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 ignore processor orders in MADT. */ 293 static int acpi_cpu_unordered; 294 TUNABLE_INT("debug.acpi.cpu_unordered", &acpi_cpu_unordered); 295 SYSCTL_INT(_debug_acpi, OID_AUTO, cpu_unordered, CTLFLAG_RDTUN, 296 &acpi_cpu_unordered, 0, 297 "Do not use the MADT to match ACPI Processor objects to CPUs."); 298 299 /* Allow users to override quirks. */ 300 TUNABLE_INT("debug.acpi.quirks", &acpi_quirks); 301 302 /* Execute optional ACPI methods for suspend and resume. */ 303 TUNABLE_INT("debug.acpi.sleep_flags", &acpi_sleep_flags); 304 SYSCTL_INT(_debug_acpi, OID_AUTO, sleep_flags, CTLFLAG_RW | CTLFLAG_TUN, 305 &acpi_sleep_flags, 0, "Execute optional ACPI methods for suspend/resume."); 306 307 static int acpi_susp_bounce; 308 SYSCTL_INT(_debug_acpi, OID_AUTO, suspend_bounce, CTLFLAG_RW, 309 &acpi_susp_bounce, 0, "Don't actually suspend, just test devices."); 310 311 /* 312 * ACPI can only be loaded as a module by the loader; activating it after 313 * system bootstrap time is not useful, and can be fatal to the system. 314 * It also cannot be unloaded, since the entire system bus hierarchy hangs 315 * off it. 316 */ 317 static int 318 acpi_modevent(struct module *mod, int event, void *junk) 319 { 320 switch (event) { 321 case MOD_LOAD: 322 if (!cold) { 323 printf("The ACPI driver cannot be loaded after boot.\n"); 324 return (EPERM); 325 } 326 break; 327 case MOD_UNLOAD: 328 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 329 return (EBUSY); 330 break; 331 default: 332 break; 333 } 334 return (0); 335 } 336 337 /* 338 * Perform early initialization. 339 */ 340 ACPI_STATUS 341 acpi_Startup(void) 342 { 343 static int started = 0; 344 ACPI_STATUS status; 345 int val; 346 347 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 348 349 /* Only run the startup code once. The MADT driver also calls this. */ 350 if (started) 351 return_VALUE (AE_OK); 352 started = 1; 353 354 /* 355 * Pre-allocate space for RSDT/XSDT and DSDT tables and allow resizing 356 * if more tables exist. 357 */ 358 if (ACPI_FAILURE(status = AcpiInitializeTables(NULL, 2, TRUE))) { 359 printf("ACPI: Table initialisation failed: %s\n", 360 AcpiFormatException(status)); 361 return_VALUE (status); 362 } 363 364 /* Set up any quirks we have for this system. */ 365 if (acpi_quirks == ACPI_Q_OK) 366 acpi_table_quirks(&acpi_quirks); 367 368 /* If the user manually set the disabled hint to 0, force-enable ACPI. */ 369 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0) 370 acpi_quirks &= ~ACPI_Q_BROKEN; 371 if (acpi_quirks & ACPI_Q_BROKEN) { 372 printf("ACPI disabled by blacklist. Contact your BIOS vendor.\n"); 373 status = AE_SUPPORT; 374 } 375 376 return_VALUE (status); 377 } 378 379 /* 380 * Detect ACPI and perform early initialisation. 381 */ 382 int 383 acpi_identify(void) 384 { 385 ACPI_TABLE_RSDP *rsdp; 386 ACPI_TABLE_HEADER *rsdt; 387 ACPI_PHYSICAL_ADDRESS paddr; 388 struct sbuf sb; 389 390 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 391 392 if (!cold) 393 return (ENXIO); 394 395 /* Check that we haven't been disabled with a hint. */ 396 if (resource_disabled("acpi", 0)) 397 return (ENXIO); 398 399 /* Check for other PM systems. */ 400 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 401 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 402 printf("ACPI identify failed, other PM system enabled.\n"); 403 return (ENXIO); 404 } 405 406 /* Initialize root tables. */ 407 if (ACPI_FAILURE(acpi_Startup())) { 408 printf("ACPI: Try disabling either ACPI or apic support.\n"); 409 return (ENXIO); 410 } 411 412 if ((paddr = AcpiOsGetRootPointer()) == 0 || 413 (rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP))) == NULL) 414 return (ENXIO); 415 if (rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress != 0) 416 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress; 417 else 418 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress; 419 AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP)); 420 421 if ((rsdt = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER))) == NULL) 422 return (ENXIO); 423 sbuf_new(&sb, acpi_desc, sizeof(acpi_desc), SBUF_FIXEDLEN); 424 sbuf_bcat(&sb, rsdt->OemId, ACPI_OEM_ID_SIZE); 425 sbuf_trim(&sb); 426 sbuf_putc(&sb, ' '); 427 sbuf_bcat(&sb, rsdt->OemTableId, ACPI_OEM_TABLE_ID_SIZE); 428 sbuf_trim(&sb); 429 sbuf_finish(&sb); 430 sbuf_delete(&sb); 431 AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER)); 432 433 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%x", ACPI_CA_VERSION); 434 435 return (0); 436 } 437 438 /* 439 * Fetch some descriptive data from ACPI to put in our attach message. 440 */ 441 static int 442 acpi_probe(device_t dev) 443 { 444 445 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 446 447 device_set_desc(dev, acpi_desc); 448 449 return_VALUE (0); 450 } 451 452 static int 453 acpi_attach(device_t dev) 454 { 455 struct acpi_softc *sc; 456 ACPI_STATUS status; 457 int error, state; 458 UINT32 flags; 459 UINT8 TypeA, TypeB; 460 char *env; 461 462 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 463 464 sc = device_get_softc(dev); 465 sc->acpi_dev = dev; 466 callout_init(&sc->susp_force_to, TRUE); 467 468 error = ENXIO; 469 470 /* Initialize resource manager. */ 471 acpi_rman_io.rm_type = RMAN_ARRAY; 472 acpi_rman_io.rm_start = 0; 473 acpi_rman_io.rm_end = 0xffff; 474 acpi_rman_io.rm_descr = "ACPI I/O ports"; 475 if (rman_init(&acpi_rman_io) != 0) 476 panic("acpi rman_init IO ports failed"); 477 acpi_rman_mem.rm_type = RMAN_ARRAY; 478 acpi_rman_mem.rm_start = 0; 479 acpi_rman_mem.rm_end = ~0ul; 480 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses"; 481 if (rman_init(&acpi_rman_mem) != 0) 482 panic("acpi rman_init memory failed"); 483 484 /* Initialise the ACPI mutex */ 485 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF); 486 487 /* 488 * Set the globals from our tunables. This is needed because ACPI-CA 489 * uses UINT8 for some values and we have no tunable_byte. 490 */ 491 AcpiGbl_AllMethodsSerialized = acpi_serialize_methods ? TRUE : FALSE; 492 AcpiGbl_EnableInterpreterSlack = acpi_interpreter_slack ? TRUE : FALSE; 493 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE; 494 495 #ifndef ACPI_DEBUG 496 /* 497 * Disable all debugging layers and levels. 498 */ 499 AcpiDbgLayer = 0; 500 AcpiDbgLevel = 0; 501 #endif 502 503 /* Start up the ACPI CA subsystem. */ 504 status = AcpiInitializeSubsystem(); 505 if (ACPI_FAILURE(status)) { 506 device_printf(dev, "Could not initialize Subsystem: %s\n", 507 AcpiFormatException(status)); 508 goto out; 509 } 510 511 /* Override OS interfaces if the user requested. */ 512 acpi_reset_interfaces(dev); 513 514 /* Load ACPI name space. */ 515 status = AcpiLoadTables(); 516 if (ACPI_FAILURE(status)) { 517 device_printf(dev, "Could not load Namespace: %s\n", 518 AcpiFormatException(status)); 519 goto out; 520 } 521 522 #if defined(__i386__) || defined(__amd64__) 523 /* Handle MCFG table if present. */ 524 acpi_enable_pcie(); 525 #endif 526 527 /* 528 * Note that some systems (specifically, those with namespace evaluation 529 * issues that require the avoidance of parts of the namespace) must 530 * avoid running _INI and _STA on everything, as well as dodging the final 531 * object init pass. 532 * 533 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 534 * 535 * XXX We should arrange for the object init pass after we have attached 536 * all our child devices, but on many systems it works here. 537 */ 538 flags = 0; 539 if (testenv("debug.acpi.avoid")) 540 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 541 542 /* Bring the hardware and basic handlers online. */ 543 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 544 device_printf(dev, "Could not enable ACPI: %s\n", 545 AcpiFormatException(status)); 546 goto out; 547 } 548 549 /* 550 * Call the ECDT probe function to provide EC functionality before 551 * the namespace has been evaluated. 552 * 553 * XXX This happens before the sysresource devices have been probed and 554 * attached so its resources come from nexus0. In practice, this isn't 555 * a problem but should be addressed eventually. 556 */ 557 acpi_ec_ecdt_probe(dev); 558 559 /* Bring device objects and regions online. */ 560 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 561 device_printf(dev, "Could not initialize ACPI objects: %s\n", 562 AcpiFormatException(status)); 563 goto out; 564 } 565 566 /* 567 * Setup our sysctl tree. 568 * 569 * XXX: This doesn't check to make sure that none of these fail. 570 */ 571 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 572 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 573 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 574 device_get_name(dev), CTLFLAG_RD, 0, ""); 575 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 576 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 577 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 578 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 579 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 580 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 581 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 582 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 583 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 584 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 585 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 586 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 587 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 588 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 589 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 590 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 591 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 592 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 593 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 594 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0, 595 "sleep delay in seconds"); 596 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 597 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode"); 598 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 599 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode"); 600 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 601 OID_AUTO, "disable_on_reboot", CTLFLAG_RW, 602 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system"); 603 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 604 OID_AUTO, "handle_reboot", CTLFLAG_RW, 605 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot"); 606 607 /* 608 * Default to 1 second before sleeping to give some machines time to 609 * stabilize. 610 */ 611 sc->acpi_sleep_delay = 1; 612 if (bootverbose) 613 sc->acpi_verbose = 1; 614 if ((env = getenv("hw.acpi.verbose")) != NULL) { 615 if (strcmp(env, "0") != 0) 616 sc->acpi_verbose = 1; 617 freeenv(env); 618 } 619 620 /* Only enable reboot by default if the FADT says it is available. */ 621 if (AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) 622 sc->acpi_handle_reboot = 1; 623 624 /* Only enable S4BIOS by default if the FACS says it is available. */ 625 if (AcpiGbl_FACS->Flags & ACPI_FACS_S4_BIOS_PRESENT) 626 sc->acpi_s4bios = 1; 627 628 /* Probe all supported sleep states. */ 629 acpi_sleep_states[ACPI_STATE_S0] = TRUE; 630 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++) 631 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) 632 acpi_sleep_states[state] = TRUE; 633 634 /* 635 * Dispatch the default sleep state to devices. The lid switch is set 636 * to UNKNOWN by default to avoid surprising users. 637 */ 638 sc->acpi_power_button_sx = acpi_sleep_states[ACPI_STATE_S5] ? 639 ACPI_STATE_S5 : ACPI_STATE_UNKNOWN; 640 sc->acpi_lid_switch_sx = ACPI_STATE_UNKNOWN; 641 sc->acpi_standby_sx = acpi_sleep_states[ACPI_STATE_S1] ? 642 ACPI_STATE_S1 : ACPI_STATE_UNKNOWN; 643 sc->acpi_suspend_sx = acpi_sleep_states[ACPI_STATE_S3] ? 644 ACPI_STATE_S3 : ACPI_STATE_UNKNOWN; 645 646 /* Pick the first valid sleep state for the sleep button default. */ 647 sc->acpi_sleep_button_sx = ACPI_STATE_UNKNOWN; 648 for (state = ACPI_STATE_S1; state <= ACPI_STATE_S4; state++) 649 if (acpi_sleep_states[state]) { 650 sc->acpi_sleep_button_sx = state; 651 break; 652 } 653 654 acpi_enable_fixed_events(sc); 655 656 /* 657 * Scan the namespace and attach/initialise children. 658 */ 659 660 /* Register our shutdown handler. */ 661 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 662 SHUTDOWN_PRI_LAST); 663 664 /* 665 * Register our acpi event handlers. 666 * XXX should be configurable eg. via userland policy manager. 667 */ 668 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 669 sc, ACPI_EVENT_PRI_LAST); 670 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 671 sc, ACPI_EVENT_PRI_LAST); 672 673 /* Flag our initial states. */ 674 sc->acpi_enabled = TRUE; 675 sc->acpi_sstate = ACPI_STATE_S0; 676 sc->acpi_sleep_disabled = TRUE; 677 678 /* Create the control device */ 679 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644, 680 "acpi"); 681 sc->acpi_dev_t->si_drv1 = sc; 682 683 if ((error = acpi_machdep_init(dev))) 684 goto out; 685 686 /* Register ACPI again to pass the correct argument of pm_func. */ 687 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 688 689 if (!acpi_disabled("bus")) 690 acpi_probe_children(dev); 691 692 /* Update all GPEs and enable runtime GPEs. */ 693 status = AcpiUpdateAllGpes(); 694 if (ACPI_FAILURE(status)) 695 device_printf(dev, "Could not update all GPEs: %s\n", 696 AcpiFormatException(status)); 697 698 /* Allow sleep request after a while. */ 699 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); 700 701 error = 0; 702 703 out: 704 return_VALUE (error); 705 } 706 707 static void 708 acpi_set_power_children(device_t dev, int state) 709 { 710 device_t child, parent; 711 device_t *devlist; 712 struct pci_devinfo *dinfo; 713 int dstate, i, numdevs; 714 715 if (device_get_children(dev, &devlist, &numdevs) != 0) 716 return; 717 718 /* 719 * Retrieve and set D-state for the sleep state if _SxD is present. 720 * Skip children who aren't attached since they are handled separately. 721 */ 722 parent = device_get_parent(dev); 723 for (i = 0; i < numdevs; i++) { 724 child = devlist[i]; 725 dinfo = device_get_ivars(child); 726 dstate = state; 727 if (device_is_attached(child) && 728 acpi_device_pwr_for_sleep(parent, dev, &dstate) == 0) 729 acpi_set_powerstate(child, dstate); 730 } 731 free(devlist, M_TEMP); 732 } 733 734 static int 735 acpi_suspend(device_t dev) 736 { 737 int error; 738 739 GIANT_REQUIRED; 740 741 error = bus_generic_suspend(dev); 742 if (error == 0) 743 acpi_set_power_children(dev, ACPI_STATE_D3); 744 745 return (error); 746 } 747 748 static int 749 acpi_resume(device_t dev) 750 { 751 752 GIANT_REQUIRED; 753 754 acpi_set_power_children(dev, ACPI_STATE_D0); 755 756 return (bus_generic_resume(dev)); 757 } 758 759 static int 760 acpi_shutdown(device_t dev) 761 { 762 763 GIANT_REQUIRED; 764 765 /* Allow children to shutdown first. */ 766 bus_generic_shutdown(dev); 767 768 /* 769 * Enable any GPEs that are able to power-on the system (i.e., RTC). 770 * Also, disable any that are not valid for this state (most). 771 */ 772 acpi_wake_prep_walk(ACPI_STATE_S5); 773 774 return (0); 775 } 776 777 /* 778 * Handle a new device being added 779 */ 780 static device_t 781 acpi_add_child(device_t bus, u_int order, const char *name, int unit) 782 { 783 struct acpi_device *ad; 784 device_t child; 785 786 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 787 return (NULL); 788 789 resource_list_init(&ad->ad_rl); 790 791 child = device_add_child_ordered(bus, order, name, unit); 792 if (child != NULL) 793 device_set_ivars(child, ad); 794 else 795 free(ad, M_ACPIDEV); 796 return (child); 797 } 798 799 static int 800 acpi_print_child(device_t bus, device_t child) 801 { 802 struct acpi_device *adev = device_get_ivars(child); 803 struct resource_list *rl = &adev->ad_rl; 804 int retval = 0; 805 806 retval += bus_print_child_header(bus, child); 807 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 808 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 809 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 810 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 811 if (device_get_flags(child)) 812 retval += printf(" flags %#x", device_get_flags(child)); 813 retval += bus_print_child_footer(bus, child); 814 815 return (retval); 816 } 817 818 /* 819 * If this device is an ACPI child but no one claimed it, attempt 820 * to power it off. We'll power it back up when a driver is added. 821 * 822 * XXX Disabled for now since many necessary devices (like fdc and 823 * ATA) don't claim the devices we created for them but still expect 824 * them to be powered up. 825 */ 826 static void 827 acpi_probe_nomatch(device_t bus, device_t child) 828 { 829 #ifdef ACPI_ENABLE_POWERDOWN_NODRIVER 830 acpi_set_powerstate(child, ACPI_STATE_D3); 831 #endif 832 } 833 834 /* 835 * If a new driver has a chance to probe a child, first power it up. 836 * 837 * XXX Disabled for now (see acpi_probe_nomatch for details). 838 */ 839 static void 840 acpi_driver_added(device_t dev, driver_t *driver) 841 { 842 device_t child, *devlist; 843 int i, numdevs; 844 845 DEVICE_IDENTIFY(driver, dev); 846 if (device_get_children(dev, &devlist, &numdevs)) 847 return; 848 for (i = 0; i < numdevs; i++) { 849 child = devlist[i]; 850 if (device_get_state(child) == DS_NOTPRESENT) { 851 #ifdef ACPI_ENABLE_POWERDOWN_NODRIVER 852 acpi_set_powerstate(child, ACPI_STATE_D0); 853 if (device_probe_and_attach(child) != 0) 854 acpi_set_powerstate(child, ACPI_STATE_D3); 855 #else 856 device_probe_and_attach(child); 857 #endif 858 } 859 } 860 free(devlist, M_TEMP); 861 } 862 863 /* Location hint for devctl(8) */ 864 static int 865 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf, 866 size_t buflen) 867 { 868 struct acpi_device *dinfo = device_get_ivars(child); 869 870 if (dinfo->ad_handle) 871 snprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle)); 872 else 873 snprintf(buf, buflen, "unknown"); 874 return (0); 875 } 876 877 /* PnP information for devctl(8) */ 878 static int 879 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 880 size_t buflen) 881 { 882 struct acpi_device *dinfo = device_get_ivars(child); 883 ACPI_DEVICE_INFO *adinfo; 884 885 if (ACPI_FAILURE(AcpiGetObjectInfo(dinfo->ad_handle, &adinfo))) { 886 snprintf(buf, buflen, "unknown"); 887 return (0); 888 } 889 890 snprintf(buf, buflen, "_HID=%s _UID=%lu", 891 (adinfo->Valid & ACPI_VALID_HID) ? 892 adinfo->HardwareId.String : "none", 893 (adinfo->Valid & ACPI_VALID_UID) ? 894 strtoul(adinfo->UniqueId.String, NULL, 10) : 0UL); 895 AcpiOsFree(adinfo); 896 897 return (0); 898 } 899 900 /* 901 * Handle per-device ivars 902 */ 903 static int 904 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 905 { 906 struct acpi_device *ad; 907 908 if ((ad = device_get_ivars(child)) == NULL) { 909 device_printf(child, "device has no ivars\n"); 910 return (ENOENT); 911 } 912 913 /* ACPI and ISA compatibility ivars */ 914 switch(index) { 915 case ACPI_IVAR_HANDLE: 916 *(ACPI_HANDLE *)result = ad->ad_handle; 917 break; 918 case ACPI_IVAR_PRIVATE: 919 *(void **)result = ad->ad_private; 920 break; 921 case ACPI_IVAR_FLAGS: 922 *(int *)result = ad->ad_flags; 923 break; 924 case ISA_IVAR_VENDORID: 925 case ISA_IVAR_SERIAL: 926 case ISA_IVAR_COMPATID: 927 *(int *)result = -1; 928 break; 929 case ISA_IVAR_LOGICALID: 930 *(int *)result = acpi_isa_get_logicalid(child); 931 break; 932 default: 933 return (ENOENT); 934 } 935 936 return (0); 937 } 938 939 static int 940 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 941 { 942 struct acpi_device *ad; 943 944 if ((ad = device_get_ivars(child)) == NULL) { 945 device_printf(child, "device has no ivars\n"); 946 return (ENOENT); 947 } 948 949 switch(index) { 950 case ACPI_IVAR_HANDLE: 951 ad->ad_handle = (ACPI_HANDLE)value; 952 break; 953 case ACPI_IVAR_PRIVATE: 954 ad->ad_private = (void *)value; 955 break; 956 case ACPI_IVAR_FLAGS: 957 ad->ad_flags = (int)value; 958 break; 959 default: 960 panic("bad ivar write request (%d)", index); 961 return (ENOENT); 962 } 963 964 return (0); 965 } 966 967 /* 968 * Handle child resource allocation/removal 969 */ 970 static struct resource_list * 971 acpi_get_rlist(device_t dev, device_t child) 972 { 973 struct acpi_device *ad; 974 975 ad = device_get_ivars(child); 976 return (&ad->ad_rl); 977 } 978 979 static int 980 acpi_match_resource_hint(device_t dev, int type, long value) 981 { 982 struct acpi_device *ad = device_get_ivars(dev); 983 struct resource_list *rl = &ad->ad_rl; 984 struct resource_list_entry *rle; 985 986 STAILQ_FOREACH(rle, rl, link) { 987 if (rle->type != type) 988 continue; 989 if (rle->start <= value && rle->end >= value) 990 return (1); 991 } 992 return (0); 993 } 994 995 /* 996 * Wire device unit numbers based on resource matches in hints. 997 */ 998 static void 999 acpi_hint_device_unit(device_t acdev, device_t child, const char *name, 1000 int *unitp) 1001 { 1002 const char *s; 1003 long value; 1004 int line, matches, unit; 1005 1006 /* 1007 * Iterate over all the hints for the devices with the specified 1008 * name to see if one's resources are a subset of this device. 1009 */ 1010 line = 0; 1011 for (;;) { 1012 if (resource_find_dev(&line, name, &unit, "at", NULL) != 0) 1013 break; 1014 1015 /* Must have an "at" for acpi or isa. */ 1016 resource_string_value(name, unit, "at", &s); 1017 if (!(strcmp(s, "acpi0") == 0 || strcmp(s, "acpi") == 0 || 1018 strcmp(s, "isa0") == 0 || strcmp(s, "isa") == 0)) 1019 continue; 1020 1021 /* 1022 * Check for matching resources. We must have at least one match. 1023 * Since I/O and memory resources cannot be shared, if we get a 1024 * match on either of those, ignore any mismatches in IRQs or DRQs. 1025 * 1026 * XXX: We may want to revisit this to be more lenient and wire 1027 * as long as it gets one match. 1028 */ 1029 matches = 0; 1030 if (resource_long_value(name, unit, "port", &value) == 0) { 1031 /* 1032 * Floppy drive controllers are notorious for having a 1033 * wide variety of resources not all of which include the 1034 * first port that is specified by the hint (typically 1035 * 0x3f0) (see the comment above fdc_isa_alloc_resources() 1036 * in fdc_isa.c). However, they do all seem to include 1037 * port + 2 (e.g. 0x3f2) so for a floppy device, look for 1038 * 'value + 2' in the port resources instead of the hint 1039 * value. 1040 */ 1041 if (strcmp(name, "fdc") == 0) 1042 value += 2; 1043 if (acpi_match_resource_hint(child, SYS_RES_IOPORT, value)) 1044 matches++; 1045 else 1046 continue; 1047 } 1048 if (resource_long_value(name, unit, "maddr", &value) == 0) { 1049 if (acpi_match_resource_hint(child, SYS_RES_MEMORY, value)) 1050 matches++; 1051 else 1052 continue; 1053 } 1054 if (matches > 0) 1055 goto matched; 1056 if (resource_long_value(name, unit, "irq", &value) == 0) { 1057 if (acpi_match_resource_hint(child, SYS_RES_IRQ, value)) 1058 matches++; 1059 else 1060 continue; 1061 } 1062 if (resource_long_value(name, unit, "drq", &value) == 0) { 1063 if (acpi_match_resource_hint(child, SYS_RES_DRQ, value)) 1064 matches++; 1065 else 1066 continue; 1067 } 1068 1069 matched: 1070 if (matches > 0) { 1071 /* We have a winner! */ 1072 *unitp = unit; 1073 break; 1074 } 1075 } 1076 } 1077 1078 /* 1079 * Pre-allocate/manage all memory and IO resources. Since rman can't handle 1080 * duplicates, we merge any in the sysresource attach routine. 1081 */ 1082 static int 1083 acpi_sysres_alloc(device_t dev) 1084 { 1085 struct resource *res; 1086 struct resource_list *rl; 1087 struct resource_list_entry *rle; 1088 struct rman *rm; 1089 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 1090 device_t *children; 1091 int child_count, i; 1092 1093 /* 1094 * Probe/attach any sysresource devices. This would be unnecessary if we 1095 * had multi-pass probe/attach. 1096 */ 1097 if (device_get_children(dev, &children, &child_count) != 0) 1098 return (ENXIO); 1099 for (i = 0; i < child_count; i++) { 1100 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 1101 device_probe_and_attach(children[i]); 1102 } 1103 free(children, M_TEMP); 1104 1105 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev); 1106 STAILQ_FOREACH(rle, rl, link) { 1107 if (rle->res != NULL) { 1108 device_printf(dev, "duplicate resource for %lx\n", rle->start); 1109 continue; 1110 } 1111 1112 /* Only memory and IO resources are valid here. */ 1113 switch (rle->type) { 1114 case SYS_RES_IOPORT: 1115 rm = &acpi_rman_io; 1116 break; 1117 case SYS_RES_MEMORY: 1118 rm = &acpi_rman_mem; 1119 break; 1120 default: 1121 continue; 1122 } 1123 1124 /* Pre-allocate resource and add to our rman pool. */ 1125 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type, 1126 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 0); 1127 if (res != NULL) { 1128 rman_manage_region(rm, rman_get_start(res), rman_get_end(res)); 1129 rle->res = res; 1130 } else 1131 device_printf(dev, "reservation of %lx, %lx (%d) failed\n", 1132 rle->start, rle->count, rle->type); 1133 } 1134 return (0); 1135 } 1136 1137 static char *pcilink_ids[] = { "PNP0C0F", NULL }; 1138 static char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 1139 1140 /* 1141 * Reserve declared resources for devices found during attach once system 1142 * resources have been allocated. 1143 */ 1144 static void 1145 acpi_reserve_resources(device_t dev) 1146 { 1147 struct resource_list_entry *rle; 1148 struct resource_list *rl; 1149 struct acpi_device *ad; 1150 struct acpi_softc *sc; 1151 device_t *children; 1152 int child_count, i; 1153 1154 sc = device_get_softc(dev); 1155 if (device_get_children(dev, &children, &child_count) != 0) 1156 return; 1157 for (i = 0; i < child_count; i++) { 1158 ad = device_get_ivars(children[i]); 1159 rl = &ad->ad_rl; 1160 1161 /* Don't reserve system resources. */ 1162 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 1163 continue; 1164 1165 STAILQ_FOREACH(rle, rl, link) { 1166 /* 1167 * Don't reserve IRQ resources. There are many sticky things 1168 * to get right otherwise (e.g. IRQs for psm, atkbd, and HPET 1169 * when using legacy routing). 1170 */ 1171 if (rle->type == SYS_RES_IRQ) 1172 continue; 1173 1174 /* 1175 * Don't reserve the resource if it is already allocated. 1176 * The acpi_ec(4) driver can allocate its resources early 1177 * if ECDT is present. 1178 */ 1179 if (rle->res != NULL) 1180 continue; 1181 1182 /* 1183 * Try to reserve the resource from our parent. If this 1184 * fails because the resource is a system resource, just 1185 * let it be. The resource range is already reserved so 1186 * that other devices will not use it. If the driver 1187 * needs to allocate the resource, then 1188 * acpi_alloc_resource() will sub-alloc from the system 1189 * resource. 1190 */ 1191 resource_list_reserve(rl, dev, children[i], rle->type, &rle->rid, 1192 rle->start, rle->end, rle->count, 0); 1193 } 1194 } 1195 free(children, M_TEMP); 1196 sc->acpi_resources_reserved = 1; 1197 } 1198 1199 static int 1200 acpi_set_resource(device_t dev, device_t child, int type, int rid, 1201 u_long start, u_long count) 1202 { 1203 struct acpi_softc *sc = device_get_softc(dev); 1204 struct acpi_device *ad = device_get_ivars(child); 1205 struct resource_list *rl = &ad->ad_rl; 1206 u_long end; 1207 1208 /* Ignore IRQ resources for PCI link devices. */ 1209 if (type == SYS_RES_IRQ && ACPI_ID_PROBE(dev, child, pcilink_ids) != NULL) 1210 return (0); 1211 1212 /* If the resource is already allocated, fail. */ 1213 if (resource_list_busy(rl, type, rid)) 1214 return (EBUSY); 1215 1216 /* If the resource is already reserved, release it. */ 1217 if (resource_list_reserved(rl, type, rid)) 1218 resource_list_unreserve(rl, dev, child, type, rid); 1219 1220 /* Add the resource. */ 1221 end = (start + count - 1); 1222 resource_list_add(rl, type, rid, start, end, count); 1223 1224 /* Don't reserve resources until the system resources are allocated. */ 1225 if (!sc->acpi_resources_reserved) 1226 return (0); 1227 1228 /* Don't reserve system resources. */ 1229 if (ACPI_ID_PROBE(dev, child, sysres_ids) != NULL) 1230 return (0); 1231 1232 /* 1233 * Don't reserve IRQ resources. There are many sticky things to 1234 * get right otherwise (e.g. IRQs for psm, atkbd, and HPET when 1235 * using legacy routing). 1236 */ 1237 if (type == SYS_RES_IRQ) 1238 return (0); 1239 1240 /* 1241 * Reserve the resource. 1242 * 1243 * XXX: Ignores failure for now. Failure here is probably a 1244 * BIOS/firmware bug? 1245 */ 1246 resource_list_reserve(rl, dev, child, type, &rid, start, end, count, 0); 1247 return (0); 1248 } 1249 1250 static struct resource * 1251 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 1252 u_long start, u_long end, u_long count, u_int flags) 1253 { 1254 ACPI_RESOURCE ares; 1255 struct acpi_device *ad; 1256 struct resource_list_entry *rle; 1257 struct resource_list *rl; 1258 struct resource *res; 1259 int isdefault = (start == 0UL && end == ~0UL); 1260 1261 /* 1262 * First attempt at allocating the resource. For direct children, 1263 * use resource_list_alloc() to handle reserved resources. For 1264 * other devices, pass the request up to our parent. 1265 */ 1266 if (bus == device_get_parent(child)) { 1267 ad = device_get_ivars(child); 1268 rl = &ad->ad_rl; 1269 1270 /* 1271 * Simulate the behavior of the ISA bus for direct children 1272 * devices. That is, if a non-default range is specified for 1273 * a resource that doesn't exist, use bus_set_resource() to 1274 * add the resource before allocating it. Note that these 1275 * resources will not be reserved. 1276 */ 1277 if (!isdefault && resource_list_find(rl, type, *rid) == NULL) 1278 resource_list_add(rl, type, *rid, start, end, count); 1279 res = resource_list_alloc(rl, bus, child, type, rid, start, end, count, 1280 flags); 1281 if (res != NULL && type == SYS_RES_IRQ) { 1282 /* 1283 * Since bus_config_intr() takes immediate effect, we cannot 1284 * configure the interrupt associated with a device when we 1285 * parse the resources but have to defer it until a driver 1286 * actually allocates the interrupt via bus_alloc_resource(). 1287 * 1288 * XXX: Should we handle the lookup failing? 1289 */ 1290 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares))) 1291 acpi_config_intr(child, &ares); 1292 } 1293 1294 /* 1295 * If this is an allocation of the "default" range for a given 1296 * RID, fetch the exact bounds for this resource from the 1297 * resource list entry to try to allocate the range from the 1298 * system resource regions. 1299 */ 1300 if (res == NULL && isdefault) { 1301 rle = resource_list_find(rl, type, *rid); 1302 if (rle != NULL) { 1303 start = rle->start; 1304 end = rle->end; 1305 count = rle->count; 1306 } 1307 } 1308 } else 1309 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid, 1310 start, end, count, flags); 1311 1312 /* 1313 * If the first attempt failed and this is an allocation of a 1314 * specific range, try to satisfy the request via a suballocation 1315 * from our system resource regions. 1316 */ 1317 if (res == NULL && start + count - 1 == end) 1318 res = acpi_alloc_sysres(child, type, rid, start, end, count, flags); 1319 return (res); 1320 } 1321 1322 /* 1323 * Attempt to allocate a specific resource range from the system 1324 * resource ranges. Note that we only handle memory and I/O port 1325 * system resources. 1326 */ 1327 struct resource * 1328 acpi_alloc_sysres(device_t child, int type, int *rid, u_long start, u_long end, 1329 u_long count, u_int flags) 1330 { 1331 struct rman *rm; 1332 struct resource *res; 1333 1334 switch (type) { 1335 case SYS_RES_IOPORT: 1336 rm = &acpi_rman_io; 1337 break; 1338 case SYS_RES_MEMORY: 1339 rm = &acpi_rman_mem; 1340 break; 1341 default: 1342 return (NULL); 1343 } 1344 1345 KASSERT(start + count - 1 == end, ("wildcard resource range")); 1346 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE, 1347 child); 1348 if (res == NULL) 1349 return (NULL); 1350 1351 rman_set_rid(res, *rid); 1352 1353 /* If requested, activate the resource using the parent's method. */ 1354 if (flags & RF_ACTIVE) 1355 if (bus_activate_resource(child, type, *rid, res) != 0) { 1356 rman_release_resource(res); 1357 return (NULL); 1358 } 1359 1360 return (res); 1361 } 1362 1363 static int 1364 acpi_is_resource_managed(int type, struct resource *r) 1365 { 1366 1367 /* We only handle memory and IO resources through rman. */ 1368 switch (type) { 1369 case SYS_RES_IOPORT: 1370 return (rman_is_region_manager(r, &acpi_rman_io)); 1371 case SYS_RES_MEMORY: 1372 return (rman_is_region_manager(r, &acpi_rman_mem)); 1373 } 1374 return (0); 1375 } 1376 1377 static int 1378 acpi_adjust_resource(device_t bus, device_t child, int type, struct resource *r, 1379 u_long start, u_long end) 1380 { 1381 1382 if (acpi_is_resource_managed(type, r)) 1383 return (rman_adjust_resource(r, start, end)); 1384 return (bus_generic_adjust_resource(bus, child, type, r, start, end)); 1385 } 1386 1387 static int 1388 acpi_release_resource(device_t bus, device_t child, int type, int rid, 1389 struct resource *r) 1390 { 1391 int ret; 1392 1393 /* 1394 * If this resource belongs to one of our internal managers, 1395 * deactivate it and release it to the local pool. 1396 */ 1397 if (acpi_is_resource_managed(type, r)) { 1398 if (rman_get_flags(r) & RF_ACTIVE) { 1399 ret = bus_deactivate_resource(child, type, rid, r); 1400 if (ret != 0) 1401 return (ret); 1402 } 1403 return (rman_release_resource(r)); 1404 } 1405 1406 return (bus_generic_rl_release_resource(bus, child, type, rid, r)); 1407 } 1408 1409 static void 1410 acpi_delete_resource(device_t bus, device_t child, int type, int rid) 1411 { 1412 struct resource_list *rl; 1413 1414 rl = acpi_get_rlist(bus, child); 1415 if (resource_list_busy(rl, type, rid)) { 1416 device_printf(bus, "delete_resource: Resource still owned by child" 1417 " (type=%d, rid=%d)\n", type, rid); 1418 return; 1419 } 1420 resource_list_unreserve(rl, bus, child, type, rid); 1421 resource_list_delete(rl, type, rid); 1422 } 1423 1424 /* Allocate an IO port or memory resource, given its GAS. */ 1425 int 1426 acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas, 1427 struct resource **res, u_int flags) 1428 { 1429 int error, res_type; 1430 1431 error = ENOMEM; 1432 if (type == NULL || rid == NULL || gas == NULL || res == NULL) 1433 return (EINVAL); 1434 1435 /* We only support memory and IO spaces. */ 1436 switch (gas->SpaceId) { 1437 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1438 res_type = SYS_RES_MEMORY; 1439 break; 1440 case ACPI_ADR_SPACE_SYSTEM_IO: 1441 res_type = SYS_RES_IOPORT; 1442 break; 1443 default: 1444 return (EOPNOTSUPP); 1445 } 1446 1447 /* 1448 * If the register width is less than 8, assume the BIOS author means 1449 * it is a bit field and just allocate a byte. 1450 */ 1451 if (gas->BitWidth && gas->BitWidth < 8) 1452 gas->BitWidth = 8; 1453 1454 /* Validate the address after we're sure we support the space. */ 1455 if (gas->Address == 0 || gas->BitWidth == 0) 1456 return (EINVAL); 1457 1458 bus_set_resource(dev, res_type, *rid, gas->Address, 1459 gas->BitWidth / 8); 1460 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags); 1461 if (*res != NULL) { 1462 *type = res_type; 1463 error = 0; 1464 } else 1465 bus_delete_resource(dev, res_type, *rid); 1466 1467 return (error); 1468 } 1469 1470 /* Probe _HID and _CID for compatible ISA PNP ids. */ 1471 static uint32_t 1472 acpi_isa_get_logicalid(device_t dev) 1473 { 1474 ACPI_DEVICE_INFO *devinfo; 1475 ACPI_HANDLE h; 1476 uint32_t pnpid; 1477 1478 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1479 1480 /* Fetch and validate the HID. */ 1481 if ((h = acpi_get_handle(dev)) == NULL || 1482 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1483 return_VALUE (0); 1484 1485 pnpid = (devinfo->Valid & ACPI_VALID_HID) != 0 && 1486 devinfo->HardwareId.Length >= ACPI_EISAID_STRING_SIZE ? 1487 PNP_EISAID(devinfo->HardwareId.String) : 0; 1488 AcpiOsFree(devinfo); 1489 1490 return_VALUE (pnpid); 1491 } 1492 1493 static int 1494 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 1495 { 1496 ACPI_DEVICE_INFO *devinfo; 1497 ACPI_DEVICE_ID *ids; 1498 ACPI_HANDLE h; 1499 uint32_t *pnpid; 1500 int i, valid; 1501 1502 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1503 1504 pnpid = cids; 1505 1506 /* Fetch and validate the CID */ 1507 if ((h = acpi_get_handle(dev)) == NULL || 1508 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1509 return_VALUE (0); 1510 1511 if ((devinfo->Valid & ACPI_VALID_CID) == 0) { 1512 AcpiOsFree(devinfo); 1513 return_VALUE (0); 1514 } 1515 1516 if (devinfo->CompatibleIdList.Count < count) 1517 count = devinfo->CompatibleIdList.Count; 1518 ids = devinfo->CompatibleIdList.Ids; 1519 for (i = 0, valid = 0; i < count; i++) 1520 if (ids[i].Length >= ACPI_EISAID_STRING_SIZE && 1521 strncmp(ids[i].String, "PNP", 3) == 0) { 1522 *pnpid++ = PNP_EISAID(ids[i].String); 1523 valid++; 1524 } 1525 AcpiOsFree(devinfo); 1526 1527 return_VALUE (valid); 1528 } 1529 1530 static char * 1531 acpi_device_id_probe(device_t bus, device_t dev, char **ids) 1532 { 1533 ACPI_HANDLE h; 1534 ACPI_OBJECT_TYPE t; 1535 int i; 1536 1537 h = acpi_get_handle(dev); 1538 if (ids == NULL || h == NULL) 1539 return (NULL); 1540 t = acpi_get_type(dev); 1541 if (t != ACPI_TYPE_DEVICE && t != ACPI_TYPE_PROCESSOR) 1542 return (NULL); 1543 1544 /* Try to match one of the array of IDs with a HID or CID. */ 1545 for (i = 0; ids[i] != NULL; i++) { 1546 if (acpi_MatchHid(h, ids[i])) 1547 return (ids[i]); 1548 } 1549 return (NULL); 1550 } 1551 1552 static ACPI_STATUS 1553 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname, 1554 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret) 1555 { 1556 ACPI_HANDLE h; 1557 1558 if (dev == NULL) 1559 h = ACPI_ROOT_OBJECT; 1560 else if ((h = acpi_get_handle(dev)) == NULL) 1561 return (AE_BAD_PARAMETER); 1562 return (AcpiEvaluateObject(h, pathname, parameters, ret)); 1563 } 1564 1565 int 1566 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate) 1567 { 1568 struct acpi_softc *sc; 1569 ACPI_HANDLE handle; 1570 ACPI_STATUS status; 1571 char sxd[8]; 1572 1573 handle = acpi_get_handle(dev); 1574 1575 /* 1576 * XXX If we find these devices, don't try to power them down. 1577 * The serial and IRDA ports on my T23 hang the system when 1578 * set to D3 and it appears that such legacy devices may 1579 * need special handling in their drivers. 1580 */ 1581 if (dstate == NULL || handle == NULL || 1582 acpi_MatchHid(handle, "PNP0500") || 1583 acpi_MatchHid(handle, "PNP0501") || 1584 acpi_MatchHid(handle, "PNP0502") || 1585 acpi_MatchHid(handle, "PNP0510") || 1586 acpi_MatchHid(handle, "PNP0511")) 1587 return (ENXIO); 1588 1589 /* 1590 * Override next state with the value from _SxD, if present. 1591 * Note illegal _S0D is evaluated because some systems expect this. 1592 */ 1593 sc = device_get_softc(bus); 1594 snprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate); 1595 status = acpi_GetInteger(handle, sxd, dstate); 1596 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { 1597 device_printf(dev, "failed to get %s on %s: %s\n", sxd, 1598 acpi_name(handle), AcpiFormatException(status)); 1599 return (ENXIO); 1600 } 1601 1602 return (0); 1603 } 1604 1605 /* Callback arg for our implementation of walking the namespace. */ 1606 struct acpi_device_scan_ctx { 1607 acpi_scan_cb_t user_fn; 1608 void *arg; 1609 ACPI_HANDLE parent; 1610 }; 1611 1612 static ACPI_STATUS 1613 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval) 1614 { 1615 struct acpi_device_scan_ctx *ctx; 1616 device_t dev, old_dev; 1617 ACPI_STATUS status; 1618 ACPI_OBJECT_TYPE type; 1619 1620 /* 1621 * Skip this device if we think we'll have trouble with it or it is 1622 * the parent where the scan began. 1623 */ 1624 ctx = (struct acpi_device_scan_ctx *)arg; 1625 if (acpi_avoid(h) || h == ctx->parent) 1626 return (AE_OK); 1627 1628 /* If this is not a valid device type (e.g., a method), skip it. */ 1629 if (ACPI_FAILURE(AcpiGetType(h, &type))) 1630 return (AE_OK); 1631 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR && 1632 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER) 1633 return (AE_OK); 1634 1635 /* 1636 * Call the user function with the current device. If it is unchanged 1637 * afterwards, return. Otherwise, we update the handle to the new dev. 1638 */ 1639 old_dev = acpi_get_device(h); 1640 dev = old_dev; 1641 status = ctx->user_fn(h, &dev, level, ctx->arg); 1642 if (ACPI_FAILURE(status) || old_dev == dev) 1643 return (status); 1644 1645 /* Remove the old child and its connection to the handle. */ 1646 if (old_dev != NULL) { 1647 device_delete_child(device_get_parent(old_dev), old_dev); 1648 AcpiDetachData(h, acpi_fake_objhandler); 1649 } 1650 1651 /* Recreate the handle association if the user created a device. */ 1652 if (dev != NULL) 1653 AcpiAttachData(h, acpi_fake_objhandler, dev); 1654 1655 return (AE_OK); 1656 } 1657 1658 static ACPI_STATUS 1659 acpi_device_scan_children(device_t bus, device_t dev, int max_depth, 1660 acpi_scan_cb_t user_fn, void *arg) 1661 { 1662 ACPI_HANDLE h; 1663 struct acpi_device_scan_ctx ctx; 1664 1665 if (acpi_disabled("children")) 1666 return (AE_OK); 1667 1668 if (dev == NULL) 1669 h = ACPI_ROOT_OBJECT; 1670 else if ((h = acpi_get_handle(dev)) == NULL) 1671 return (AE_BAD_PARAMETER); 1672 ctx.user_fn = user_fn; 1673 ctx.arg = arg; 1674 ctx.parent = h; 1675 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth, 1676 acpi_device_scan_cb, NULL, &ctx, NULL)); 1677 } 1678 1679 /* 1680 * Even though ACPI devices are not PCI, we use the PCI approach for setting 1681 * device power states since it's close enough to ACPI. 1682 */ 1683 static int 1684 acpi_set_powerstate(device_t child, int state) 1685 { 1686 ACPI_HANDLE h; 1687 ACPI_STATUS status; 1688 1689 h = acpi_get_handle(child); 1690 if (state < ACPI_STATE_D0 || state > ACPI_D_STATES_MAX) 1691 return (EINVAL); 1692 if (h == NULL) 1693 return (0); 1694 1695 /* Ignore errors if the power methods aren't present. */ 1696 status = acpi_pwr_switch_consumer(h, state); 1697 if (ACPI_SUCCESS(status)) { 1698 if (bootverbose) 1699 device_printf(child, "set ACPI power state D%d on %s\n", 1700 state, acpi_name(h)); 1701 } else if (status != AE_NOT_FOUND) 1702 device_printf(child, 1703 "failed to set ACPI power state D%d on %s: %s\n", state, 1704 acpi_name(h), AcpiFormatException(status)); 1705 1706 return (0); 1707 } 1708 1709 static int 1710 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 1711 { 1712 int result, cid_count, i; 1713 uint32_t lid, cids[8]; 1714 1715 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1716 1717 /* 1718 * ISA-style drivers attached to ACPI may persist and 1719 * probe manually if we return ENOENT. We never want 1720 * that to happen, so don't ever return it. 1721 */ 1722 result = ENXIO; 1723 1724 /* Scan the supplied IDs for a match */ 1725 lid = acpi_isa_get_logicalid(child); 1726 cid_count = acpi_isa_get_compatid(child, cids, 8); 1727 while (ids && ids->ip_id) { 1728 if (lid == ids->ip_id) { 1729 result = 0; 1730 goto out; 1731 } 1732 for (i = 0; i < cid_count; i++) { 1733 if (cids[i] == ids->ip_id) { 1734 result = 0; 1735 goto out; 1736 } 1737 } 1738 ids++; 1739 } 1740 1741 out: 1742 if (result == 0 && ids->ip_desc) 1743 device_set_desc(child, ids->ip_desc); 1744 1745 return_VALUE (result); 1746 } 1747 1748 #if defined(__i386__) || defined(__amd64__) 1749 /* 1750 * Look for a MCFG table. If it is present, use the settings for 1751 * domain (segment) 0 to setup PCI config space access via the memory 1752 * map. 1753 */ 1754 static void 1755 acpi_enable_pcie(void) 1756 { 1757 ACPI_TABLE_HEADER *hdr; 1758 ACPI_MCFG_ALLOCATION *alloc, *end; 1759 ACPI_STATUS status; 1760 1761 status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr); 1762 if (ACPI_FAILURE(status)) 1763 return; 1764 1765 end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length); 1766 alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1); 1767 while (alloc < end) { 1768 if (alloc->PciSegment == 0) { 1769 pcie_cfgregopen(alloc->Address, alloc->StartBusNumber, 1770 alloc->EndBusNumber); 1771 return; 1772 } 1773 alloc++; 1774 } 1775 } 1776 #endif 1777 1778 /* 1779 * Scan all of the ACPI namespace and attach child devices. 1780 * 1781 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and 1782 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec. 1783 * However, in violation of the spec, some systems place their PCI link 1784 * devices in \, so we have to walk the whole namespace. We check the 1785 * type of namespace nodes, so this should be ok. 1786 */ 1787 static void 1788 acpi_probe_children(device_t bus) 1789 { 1790 1791 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1792 1793 /* 1794 * Scan the namespace and insert placeholders for all the devices that 1795 * we find. We also probe/attach any early devices. 1796 * 1797 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1798 * we want to create nodes for all devices, not just those that are 1799 * currently present. (This assumes that we don't want to create/remove 1800 * devices as they appear, which might be smarter.) 1801 */ 1802 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1803 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, acpi_probe_child, 1804 NULL, bus, NULL); 1805 1806 /* Pre-allocate resources for our rman from any sysresource devices. */ 1807 acpi_sysres_alloc(bus); 1808 1809 /* Reserve resources already allocated to children. */ 1810 acpi_reserve_resources(bus); 1811 1812 /* Create any static children by calling device identify methods. */ 1813 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1814 bus_generic_probe(bus); 1815 1816 /* Probe/attach all children, created statically and from the namespace. */ 1817 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "acpi bus_generic_attach\n")); 1818 bus_generic_attach(bus); 1819 1820 /* Attach wake sysctls. */ 1821 acpi_wake_sysctl_walk(bus); 1822 1823 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1824 return_VOID; 1825 } 1826 1827 /* 1828 * Determine the probe order for a given device. 1829 */ 1830 static void 1831 acpi_probe_order(ACPI_HANDLE handle, int *order) 1832 { 1833 ACPI_OBJECT_TYPE type; 1834 1835 /* 1836 * 0. CPUs 1837 * 1. I/O port and memory system resource holders 1838 * 2. Clocks and timers (to handle early accesses) 1839 * 3. Embedded controllers (to handle early accesses) 1840 * 4. PCI Link Devices 1841 */ 1842 AcpiGetType(handle, &type); 1843 if (type == ACPI_TYPE_PROCESSOR) 1844 *order = 0; 1845 else if (acpi_MatchHid(handle, "PNP0C01") || 1846 acpi_MatchHid(handle, "PNP0C02")) 1847 *order = 1; 1848 else if (acpi_MatchHid(handle, "PNP0100") || 1849 acpi_MatchHid(handle, "PNP0103") || 1850 acpi_MatchHid(handle, "PNP0B00")) 1851 *order = 2; 1852 else if (acpi_MatchHid(handle, "PNP0C09")) 1853 *order = 3; 1854 else if (acpi_MatchHid(handle, "PNP0C0F")) 1855 *order = 4; 1856 } 1857 1858 /* 1859 * Evaluate a child device and determine whether we might attach a device to 1860 * it. 1861 */ 1862 static ACPI_STATUS 1863 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1864 { 1865 struct acpi_prw_data prw; 1866 ACPI_BUFFER buf; 1867 ACPI_OBJECT obj; 1868 ACPI_OBJECT_TYPE type; 1869 ACPI_HANDLE h; 1870 struct pcpu *pc; 1871 device_t bus, child; 1872 char *handle_str; 1873 u_int cpuid; 1874 int order, unit; 1875 1876 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1877 1878 if (acpi_disabled("children")) 1879 return_ACPI_STATUS (AE_OK); 1880 1881 /* Skip this device if we think we'll have trouble with it. */ 1882 if (acpi_avoid(handle)) 1883 return_ACPI_STATUS (AE_OK); 1884 1885 bus = (device_t)context; 1886 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1887 handle_str = acpi_name(handle); 1888 switch (type) { 1889 case ACPI_TYPE_DEVICE: 1890 /* 1891 * Since we scan from \, be sure to skip system scope objects. 1892 * \_SB_ and \_TZ_ are defined in ACPICA as devices to work around 1893 * BIOS bugs. For example, \_SB_ is to allow \_SB_._INI to be run 1894 * during the intialization and \_TZ_ is to support Notify() on it. 1895 */ 1896 if (strcmp(handle_str, "\\_SB_") == 0 || 1897 strcmp(handle_str, "\\_TZ_") == 0) 1898 break; 1899 if (acpi_parse_prw(handle, &prw) == 0) 1900 AcpiSetupGpeForWake(handle, prw.gpe_handle, prw.gpe_bit); 1901 1902 /* 1903 * Ignore devices that do not have a _HID or _CID. They should 1904 * be discovered by other buses (e.g. the PCI bus driver). 1905 */ 1906 if (!acpi_has_hid(handle)) 1907 break; 1908 /* FALLTHROUGH */ 1909 case ACPI_TYPE_PROCESSOR: 1910 case ACPI_TYPE_THERMAL: 1911 case ACPI_TYPE_POWER: 1912 unit = -1; 1913 if (type == ACPI_TYPE_PROCESSOR && acpi_cpu_unordered == 0) { 1914 ACPI_STATUS s; 1915 buf.Pointer = &obj; 1916 buf.Length = sizeof(obj); 1917 s = AcpiEvaluateObject(handle, NULL, NULL, &buf); 1918 if (ACPI_SUCCESS(s)) { 1919 CPU_FOREACH(cpuid) { 1920 pc = pcpu_find(cpuid); 1921 if (pc->pc_acpi_id == obj.Processor.ProcId) { 1922 unit = cpuid; 1923 if (bootverbose) 1924 printf("ACPI: %s (ACPI ID %u) -> cpu%d\n", 1925 handle_str, obj.Processor.ProcId, unit); 1926 break; 1927 } 1928 } 1929 if (unit == -1) { 1930 if (bootverbose) 1931 printf("ACPI: %s (ACPI ID %u) ignored\n", 1932 handle_str, obj.Processor.ProcId); 1933 break; 1934 } 1935 } 1936 } 1937 /* 1938 * Create a placeholder device for this node. Sort the 1939 * placeholder so that the probe/attach passes will run 1940 * breadth-first. Orders less than ACPI_DEV_BASE_ORDER 1941 * are reserved for special objects (i.e., system 1942 * resources). 1943 */ 1944 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str)); 1945 order = level * 10 + ACPI_DEV_BASE_ORDER; 1946 acpi_probe_order(handle, &order); 1947 child = BUS_ADD_CHILD(bus, order, NULL, unit); 1948 if (child == NULL) 1949 break; 1950 1951 /* Associate the handle with the device_t and vice versa. */ 1952 acpi_set_handle(child, handle); 1953 AcpiAttachData(handle, acpi_fake_objhandler, child); 1954 1955 /* 1956 * Check that the device is present. If it's not present, 1957 * leave it disabled (so that we have a device_t attached to 1958 * the handle, but we don't probe it). 1959 * 1960 * XXX PCI link devices sometimes report "present" but not 1961 * "functional" (i.e. if disabled). Go ahead and probe them 1962 * anyway since we may enable them later. 1963 */ 1964 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 1965 /* Never disable PCI link devices. */ 1966 if (acpi_MatchHid(handle, "PNP0C0F")) 1967 break; 1968 /* 1969 * Docking stations should remain enabled since the system 1970 * may be undocked at boot. 1971 */ 1972 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h))) 1973 break; 1974 1975 device_disable(child); 1976 break; 1977 } 1978 1979 /* 1980 * Get the device's resource settings and attach them. 1981 * Note that if the device has _PRS but no _CRS, we need 1982 * to decide when it's appropriate to try to configure the 1983 * device. Ignore the return value here; it's OK for the 1984 * device not to have any resources. 1985 */ 1986 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 1987 break; 1988 } 1989 } 1990 1991 return_ACPI_STATUS (AE_OK); 1992 } 1993 1994 /* 1995 * AcpiAttachData() requires an object handler but never uses it. This is a 1996 * placeholder object handler so we can store a device_t in an ACPI_HANDLE. 1997 */ 1998 void 1999 acpi_fake_objhandler(ACPI_HANDLE h, void *data) 2000 { 2001 } 2002 2003 static void 2004 acpi_shutdown_final(void *arg, int howto) 2005 { 2006 struct acpi_softc *sc = (struct acpi_softc *)arg; 2007 register_t intr; 2008 ACPI_STATUS status; 2009 2010 /* 2011 * XXX Shutdown code should only run on the BSP (cpuid 0). 2012 * Some chipsets do not power off the system correctly if called from 2013 * an AP. 2014 */ 2015 if ((howto & RB_POWEROFF) != 0) { 2016 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 2017 if (ACPI_FAILURE(status)) { 2018 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2019 AcpiFormatException(status)); 2020 return; 2021 } 2022 device_printf(sc->acpi_dev, "Powering system off\n"); 2023 intr = intr_disable(); 2024 status = AcpiEnterSleepState(ACPI_STATE_S5, acpi_sleep_flags); 2025 if (ACPI_FAILURE(status)) { 2026 intr_restore(intr); 2027 device_printf(sc->acpi_dev, "power-off failed - %s\n", 2028 AcpiFormatException(status)); 2029 } else { 2030 DELAY(1000000); 2031 intr_restore(intr); 2032 device_printf(sc->acpi_dev, "power-off failed - timeout\n"); 2033 } 2034 } else if ((howto & RB_HALT) == 0 && sc->acpi_handle_reboot) { 2035 /* Reboot using the reset register. */ 2036 status = AcpiReset(); 2037 if (ACPI_SUCCESS(status)) { 2038 DELAY(1000000); 2039 device_printf(sc->acpi_dev, "reset failed - timeout\n"); 2040 } else if (status != AE_NOT_EXIST) 2041 device_printf(sc->acpi_dev, "reset failed - %s\n", 2042 AcpiFormatException(status)); 2043 } else if (sc->acpi_do_disable && panicstr == NULL) { 2044 /* 2045 * Only disable ACPI if the user requested. On some systems, writing 2046 * the disable value to SMI_CMD hangs the system. 2047 */ 2048 device_printf(sc->acpi_dev, "Shutting down\n"); 2049 AcpiTerminate(); 2050 } 2051 } 2052 2053 static void 2054 acpi_enable_fixed_events(struct acpi_softc *sc) 2055 { 2056 static int first_time = 1; 2057 2058 /* Enable and clear fixed events and install handlers. */ 2059 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) { 2060 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 2061 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 2062 acpi_event_power_button_sleep, sc); 2063 if (first_time) 2064 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 2065 } 2066 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) { 2067 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 2068 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 2069 acpi_event_sleep_button_sleep, sc); 2070 if (first_time) 2071 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 2072 } 2073 2074 first_time = 0; 2075 } 2076 2077 /* 2078 * Returns true if the device is actually present and should 2079 * be attached to. This requires the present, enabled, UI-visible 2080 * and diagnostics-passed bits to be set. 2081 */ 2082 BOOLEAN 2083 acpi_DeviceIsPresent(device_t dev) 2084 { 2085 ACPI_DEVICE_INFO *devinfo; 2086 ACPI_HANDLE h; 2087 BOOLEAN present; 2088 2089 if ((h = acpi_get_handle(dev)) == NULL || 2090 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2091 return (FALSE); 2092 2093 /* If no _STA method, must be present */ 2094 present = (devinfo->Valid & ACPI_VALID_STA) == 0 || 2095 ACPI_DEVICE_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE; 2096 2097 AcpiOsFree(devinfo); 2098 return (present); 2099 } 2100 2101 /* 2102 * Returns true if the battery is actually present and inserted. 2103 */ 2104 BOOLEAN 2105 acpi_BatteryIsPresent(device_t dev) 2106 { 2107 ACPI_DEVICE_INFO *devinfo; 2108 ACPI_HANDLE h; 2109 BOOLEAN present; 2110 2111 if ((h = acpi_get_handle(dev)) == NULL || 2112 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2113 return (FALSE); 2114 2115 /* If no _STA method, must be present */ 2116 present = (devinfo->Valid & ACPI_VALID_STA) == 0 || 2117 ACPI_BATTERY_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE; 2118 2119 AcpiOsFree(devinfo); 2120 return (present); 2121 } 2122 2123 /* 2124 * Returns true if a device has at least one valid device ID. 2125 */ 2126 static BOOLEAN 2127 acpi_has_hid(ACPI_HANDLE h) 2128 { 2129 ACPI_DEVICE_INFO *devinfo; 2130 BOOLEAN ret; 2131 2132 if (h == NULL || 2133 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2134 return (FALSE); 2135 2136 ret = FALSE; 2137 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 2138 ret = TRUE; 2139 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) 2140 if (devinfo->CompatibleIdList.Count > 0) 2141 ret = TRUE; 2142 2143 AcpiOsFree(devinfo); 2144 return (ret); 2145 } 2146 2147 /* 2148 * Match a HID string against a handle 2149 */ 2150 BOOLEAN 2151 acpi_MatchHid(ACPI_HANDLE h, const char *hid) 2152 { 2153 ACPI_DEVICE_INFO *devinfo; 2154 BOOLEAN ret; 2155 int i; 2156 2157 if (hid == NULL || h == NULL || 2158 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2159 return (FALSE); 2160 2161 ret = FALSE; 2162 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 2163 strcmp(hid, devinfo->HardwareId.String) == 0) 2164 ret = TRUE; 2165 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) 2166 for (i = 0; i < devinfo->CompatibleIdList.Count; i++) { 2167 if (strcmp(hid, devinfo->CompatibleIdList.Ids[i].String) == 0) { 2168 ret = TRUE; 2169 break; 2170 } 2171 } 2172 2173 AcpiOsFree(devinfo); 2174 return (ret); 2175 } 2176 2177 /* 2178 * Return the handle of a named object within our scope, ie. that of (parent) 2179 * or one if its parents. 2180 */ 2181 ACPI_STATUS 2182 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 2183 { 2184 ACPI_HANDLE r; 2185 ACPI_STATUS status; 2186 2187 /* Walk back up the tree to the root */ 2188 for (;;) { 2189 status = AcpiGetHandle(parent, path, &r); 2190 if (ACPI_SUCCESS(status)) { 2191 *result = r; 2192 return (AE_OK); 2193 } 2194 /* XXX Return error here? */ 2195 if (status != AE_NOT_FOUND) 2196 return (AE_OK); 2197 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 2198 return (AE_NOT_FOUND); 2199 parent = r; 2200 } 2201 } 2202 2203 /* 2204 * Allocate a buffer with a preset data size. 2205 */ 2206 ACPI_BUFFER * 2207 acpi_AllocBuffer(int size) 2208 { 2209 ACPI_BUFFER *buf; 2210 2211 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 2212 return (NULL); 2213 buf->Length = size; 2214 buf->Pointer = (void *)(buf + 1); 2215 return (buf); 2216 } 2217 2218 ACPI_STATUS 2219 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 2220 { 2221 ACPI_OBJECT arg1; 2222 ACPI_OBJECT_LIST args; 2223 2224 arg1.Type = ACPI_TYPE_INTEGER; 2225 arg1.Integer.Value = number; 2226 args.Count = 1; 2227 args.Pointer = &arg1; 2228 2229 return (AcpiEvaluateObject(handle, path, &args, NULL)); 2230 } 2231 2232 /* 2233 * Evaluate a path that should return an integer. 2234 */ 2235 ACPI_STATUS 2236 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 2237 { 2238 ACPI_STATUS status; 2239 ACPI_BUFFER buf; 2240 ACPI_OBJECT param; 2241 2242 if (handle == NULL) 2243 handle = ACPI_ROOT_OBJECT; 2244 2245 /* 2246 * Assume that what we've been pointed at is an Integer object, or 2247 * a method that will return an Integer. 2248 */ 2249 buf.Pointer = ¶m; 2250 buf.Length = sizeof(param); 2251 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2252 if (ACPI_SUCCESS(status)) { 2253 if (param.Type == ACPI_TYPE_INTEGER) 2254 *number = param.Integer.Value; 2255 else 2256 status = AE_TYPE; 2257 } 2258 2259 /* 2260 * In some applications, a method that's expected to return an Integer 2261 * may instead return a Buffer (probably to simplify some internal 2262 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 2263 * convert it into an Integer as best we can. 2264 * 2265 * This is a hack. 2266 */ 2267 if (status == AE_BUFFER_OVERFLOW) { 2268 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 2269 status = AE_NO_MEMORY; 2270 } else { 2271 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2272 if (ACPI_SUCCESS(status)) 2273 status = acpi_ConvertBufferToInteger(&buf, number); 2274 AcpiOsFree(buf.Pointer); 2275 } 2276 } 2277 return (status); 2278 } 2279 2280 ACPI_STATUS 2281 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 2282 { 2283 ACPI_OBJECT *p; 2284 UINT8 *val; 2285 int i; 2286 2287 p = (ACPI_OBJECT *)bufp->Pointer; 2288 if (p->Type == ACPI_TYPE_INTEGER) { 2289 *number = p->Integer.Value; 2290 return (AE_OK); 2291 } 2292 if (p->Type != ACPI_TYPE_BUFFER) 2293 return (AE_TYPE); 2294 if (p->Buffer.Length > sizeof(int)) 2295 return (AE_BAD_DATA); 2296 2297 *number = 0; 2298 val = p->Buffer.Pointer; 2299 for (i = 0; i < p->Buffer.Length; i++) 2300 *number += val[i] << (i * 8); 2301 return (AE_OK); 2302 } 2303 2304 /* 2305 * Iterate over the elements of an a package object, calling the supplied 2306 * function for each element. 2307 * 2308 * XXX possible enhancement might be to abort traversal on error. 2309 */ 2310 ACPI_STATUS 2311 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 2312 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 2313 { 2314 ACPI_OBJECT *comp; 2315 int i; 2316 2317 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 2318 return (AE_BAD_PARAMETER); 2319 2320 /* Iterate over components */ 2321 i = 0; 2322 comp = pkg->Package.Elements; 2323 for (; i < pkg->Package.Count; i++, comp++) 2324 func(comp, arg); 2325 2326 return (AE_OK); 2327 } 2328 2329 /* 2330 * Find the (index)th resource object in a set. 2331 */ 2332 ACPI_STATUS 2333 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 2334 { 2335 ACPI_RESOURCE *rp; 2336 int i; 2337 2338 rp = (ACPI_RESOURCE *)buf->Pointer; 2339 i = index; 2340 while (i-- > 0) { 2341 /* Range check */ 2342 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2343 return (AE_BAD_PARAMETER); 2344 2345 /* Check for terminator */ 2346 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2347 return (AE_NOT_FOUND); 2348 rp = ACPI_NEXT_RESOURCE(rp); 2349 } 2350 if (resp != NULL) 2351 *resp = rp; 2352 2353 return (AE_OK); 2354 } 2355 2356 /* 2357 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 2358 * 2359 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 2360 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 2361 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 2362 * resources. 2363 */ 2364 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 2365 2366 ACPI_STATUS 2367 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 2368 { 2369 ACPI_RESOURCE *rp; 2370 void *newp; 2371 2372 /* Initialise the buffer if necessary. */ 2373 if (buf->Pointer == NULL) { 2374 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 2375 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 2376 return (AE_NO_MEMORY); 2377 rp = (ACPI_RESOURCE *)buf->Pointer; 2378 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2379 rp->Length = 0; 2380 } 2381 if (res == NULL) 2382 return (AE_OK); 2383 2384 /* 2385 * Scan the current buffer looking for the terminator. 2386 * This will either find the terminator or hit the end 2387 * of the buffer and return an error. 2388 */ 2389 rp = (ACPI_RESOURCE *)buf->Pointer; 2390 for (;;) { 2391 /* Range check, don't go outside the buffer */ 2392 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2393 return (AE_BAD_PARAMETER); 2394 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2395 break; 2396 rp = ACPI_NEXT_RESOURCE(rp); 2397 } 2398 2399 /* 2400 * Check the size of the buffer and expand if required. 2401 * 2402 * Required size is: 2403 * size of existing resources before terminator + 2404 * size of new resource and header + 2405 * size of terminator. 2406 * 2407 * Note that this loop should really only run once, unless 2408 * for some reason we are stuffing a *really* huge resource. 2409 */ 2410 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 2411 res->Length + ACPI_RS_SIZE_NO_DATA + 2412 ACPI_RS_SIZE_MIN) >= buf->Length) { 2413 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 2414 return (AE_NO_MEMORY); 2415 bcopy(buf->Pointer, newp, buf->Length); 2416 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 2417 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 2418 AcpiOsFree(buf->Pointer); 2419 buf->Pointer = newp; 2420 buf->Length += buf->Length; 2421 } 2422 2423 /* Insert the new resource. */ 2424 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA); 2425 2426 /* And add the terminator. */ 2427 rp = ACPI_NEXT_RESOURCE(rp); 2428 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2429 rp->Length = 0; 2430 2431 return (AE_OK); 2432 } 2433 2434 /* 2435 * Set interrupt model. 2436 */ 2437 ACPI_STATUS 2438 acpi_SetIntrModel(int model) 2439 { 2440 2441 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 2442 } 2443 2444 /* 2445 * Walk subtables of a table and call a callback routine for each 2446 * subtable. The caller should provide the first subtable and a 2447 * pointer to the end of the table. This can be used to walk tables 2448 * such as MADT and SRAT that use subtable entries. 2449 */ 2450 void 2451 acpi_walk_subtables(void *first, void *end, acpi_subtable_handler *handler, 2452 void *arg) 2453 { 2454 ACPI_SUBTABLE_HEADER *entry; 2455 2456 for (entry = first; (void *)entry < end; ) { 2457 /* Avoid an infinite loop if we hit a bogus entry. */ 2458 if (entry->Length < sizeof(ACPI_SUBTABLE_HEADER)) 2459 return; 2460 2461 handler(entry, arg); 2462 entry = ACPI_ADD_PTR(ACPI_SUBTABLE_HEADER, entry, entry->Length); 2463 } 2464 } 2465 2466 /* 2467 * DEPRECATED. This interface has serious deficiencies and will be 2468 * removed. 2469 * 2470 * Immediately enter the sleep state. In the old model, acpiconf(8) ran 2471 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this. 2472 */ 2473 ACPI_STATUS 2474 acpi_SetSleepState(struct acpi_softc *sc, int state) 2475 { 2476 static int once; 2477 2478 if (!once) { 2479 device_printf(sc->acpi_dev, 2480 "warning: acpi_SetSleepState() deprecated, need to update your software\n"); 2481 once = 1; 2482 } 2483 return (acpi_EnterSleepState(sc, state)); 2484 } 2485 2486 #if defined(__amd64__) || defined(__i386__) 2487 static void 2488 acpi_sleep_force(void *arg) 2489 { 2490 struct acpi_softc *sc = (struct acpi_softc *)arg; 2491 2492 device_printf(sc->acpi_dev, 2493 "suspend request timed out, forcing sleep now\n"); 2494 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2495 device_printf(sc->acpi_dev, "force sleep state S%d failed\n", 2496 sc->acpi_next_sstate); 2497 } 2498 #endif 2499 2500 /* 2501 * Request that the system enter the given suspend state. All /dev/apm 2502 * devices and devd(8) will be notified. Userland then has a chance to 2503 * save state and acknowledge the request. The system sleeps once all 2504 * acks are in. 2505 */ 2506 int 2507 acpi_ReqSleepState(struct acpi_softc *sc, int state) 2508 { 2509 #if defined(__amd64__) || defined(__i386__) 2510 struct apm_clone_data *clone; 2511 ACPI_STATUS status; 2512 2513 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX) 2514 return (EINVAL); 2515 if (!acpi_sleep_states[state]) 2516 return (EOPNOTSUPP); 2517 2518 /* Wait until sleep is enabled. */ 2519 while (sc->acpi_sleep_disabled) { 2520 AcpiOsSleep(1000); 2521 } 2522 2523 ACPI_LOCK(acpi); 2524 2525 /* If a suspend request is already in progress, just return. */ 2526 if (sc->acpi_next_sstate != 0) { 2527 ACPI_UNLOCK(acpi); 2528 return (0); 2529 } 2530 sc->acpi_next_sstate = state; 2531 2532 /* S5 (soft-off) should be entered directly with no waiting. */ 2533 if (state == ACPI_STATE_S5) { 2534 ACPI_UNLOCK(acpi); 2535 status = acpi_EnterSleepState(sc, state); 2536 return (ACPI_SUCCESS(status) ? 0 : ENXIO); 2537 } 2538 2539 /* Record the pending state and notify all apm devices. */ 2540 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2541 clone->notify_status = APM_EV_NONE; 2542 if ((clone->flags & ACPI_EVF_DEVD) == 0) { 2543 selwakeuppri(&clone->sel_read, PZERO); 2544 KNOTE_LOCKED(&clone->sel_read.si_note, 0); 2545 } 2546 } 2547 2548 /* If devd(8) is not running, immediately enter the sleep state. */ 2549 if (!devctl_process_running()) { 2550 ACPI_UNLOCK(acpi); 2551 status = acpi_EnterSleepState(sc, state); 2552 return (ACPI_SUCCESS(status) ? 0 : ENXIO); 2553 } 2554 2555 /* 2556 * Set a timeout to fire if userland doesn't ack the suspend request 2557 * in time. This way we still eventually go to sleep if we were 2558 * overheating or running low on battery, even if userland is hung. 2559 * We cancel this timeout once all userland acks are in or the 2560 * suspend request is aborted. 2561 */ 2562 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc); 2563 ACPI_UNLOCK(acpi); 2564 2565 /* Now notify devd(8) also. */ 2566 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state); 2567 2568 return (0); 2569 #else 2570 /* This platform does not support acpi suspend/resume. */ 2571 return (EOPNOTSUPP); 2572 #endif 2573 } 2574 2575 /* 2576 * Acknowledge (or reject) a pending sleep state. The caller has 2577 * prepared for suspend and is now ready for it to proceed. If the 2578 * error argument is non-zero, it indicates suspend should be cancelled 2579 * and gives an errno value describing why. Once all votes are in, 2580 * we suspend the system. 2581 */ 2582 int 2583 acpi_AckSleepState(struct apm_clone_data *clone, int error) 2584 { 2585 #if defined(__amd64__) || defined(__i386__) 2586 struct acpi_softc *sc; 2587 int ret, sleeping; 2588 2589 /* If no pending sleep state, return an error. */ 2590 ACPI_LOCK(acpi); 2591 sc = clone->acpi_sc; 2592 if (sc->acpi_next_sstate == 0) { 2593 ACPI_UNLOCK(acpi); 2594 return (ENXIO); 2595 } 2596 2597 /* Caller wants to abort suspend process. */ 2598 if (error) { 2599 sc->acpi_next_sstate = 0; 2600 callout_stop(&sc->susp_force_to); 2601 device_printf(sc->acpi_dev, 2602 "listener on %s cancelled the pending suspend\n", 2603 devtoname(clone->cdev)); 2604 ACPI_UNLOCK(acpi); 2605 return (0); 2606 } 2607 2608 /* 2609 * Mark this device as acking the suspend request. Then, walk through 2610 * all devices, seeing if they agree yet. We only count devices that 2611 * are writable since read-only devices couldn't ack the request. 2612 */ 2613 sleeping = TRUE; 2614 clone->notify_status = APM_EV_ACKED; 2615 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2616 if ((clone->flags & ACPI_EVF_WRITE) != 0 && 2617 clone->notify_status != APM_EV_ACKED) { 2618 sleeping = FALSE; 2619 break; 2620 } 2621 } 2622 2623 /* If all devices have voted "yes", we will suspend now. */ 2624 if (sleeping) 2625 callout_stop(&sc->susp_force_to); 2626 ACPI_UNLOCK(acpi); 2627 ret = 0; 2628 if (sleeping) { 2629 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2630 ret = ENODEV; 2631 } 2632 return (ret); 2633 #else 2634 /* This platform does not support acpi suspend/resume. */ 2635 return (EOPNOTSUPP); 2636 #endif 2637 } 2638 2639 static void 2640 acpi_sleep_enable(void *arg) 2641 { 2642 struct acpi_softc *sc = (struct acpi_softc *)arg; 2643 2644 /* Reschedule if the system is not fully up and running. */ 2645 if (!AcpiGbl_SystemAwakeAndRunning) { 2646 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); 2647 return; 2648 } 2649 2650 ACPI_LOCK(acpi); 2651 sc->acpi_sleep_disabled = FALSE; 2652 ACPI_UNLOCK(acpi); 2653 } 2654 2655 static ACPI_STATUS 2656 acpi_sleep_disable(struct acpi_softc *sc) 2657 { 2658 ACPI_STATUS status; 2659 2660 /* Fail if the system is not fully up and running. */ 2661 if (!AcpiGbl_SystemAwakeAndRunning) 2662 return (AE_ERROR); 2663 2664 ACPI_LOCK(acpi); 2665 status = sc->acpi_sleep_disabled ? AE_ERROR : AE_OK; 2666 sc->acpi_sleep_disabled = TRUE; 2667 ACPI_UNLOCK(acpi); 2668 2669 return (status); 2670 } 2671 2672 enum acpi_sleep_state { 2673 ACPI_SS_NONE, 2674 ACPI_SS_GPE_SET, 2675 ACPI_SS_DEV_SUSPEND, 2676 ACPI_SS_SLP_PREP, 2677 ACPI_SS_SLEPT, 2678 }; 2679 2680 /* 2681 * Enter the desired system sleep state. 2682 * 2683 * Currently we support S1-S5 but S4 is only S4BIOS 2684 */ 2685 static ACPI_STATUS 2686 acpi_EnterSleepState(struct acpi_softc *sc, int state) 2687 { 2688 register_t intr; 2689 ACPI_STATUS status; 2690 enum acpi_sleep_state slp_state; 2691 2692 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2693 2694 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX) 2695 return_ACPI_STATUS (AE_BAD_PARAMETER); 2696 if (!acpi_sleep_states[state]) { 2697 device_printf(sc->acpi_dev, "Sleep state S%d not supported by BIOS\n", 2698 state); 2699 return (AE_SUPPORT); 2700 } 2701 2702 /* Re-entry once we're suspending is not allowed. */ 2703 status = acpi_sleep_disable(sc); 2704 if (ACPI_FAILURE(status)) { 2705 device_printf(sc->acpi_dev, 2706 "suspend request ignored (not ready yet)\n"); 2707 return (status); 2708 } 2709 2710 if (state == ACPI_STATE_S5) { 2711 /* 2712 * Shut down cleanly and power off. This will call us back through the 2713 * shutdown handlers. 2714 */ 2715 shutdown_nice(RB_POWEROFF); 2716 return_ACPI_STATUS (AE_OK); 2717 } 2718 2719 EVENTHANDLER_INVOKE(power_suspend); 2720 2721 if (smp_started) { 2722 thread_lock(curthread); 2723 sched_bind(curthread, 0); 2724 thread_unlock(curthread); 2725 } 2726 2727 /* 2728 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE 2729 * drivers need this. 2730 */ 2731 mtx_lock(&Giant); 2732 2733 slp_state = ACPI_SS_NONE; 2734 2735 sc->acpi_sstate = state; 2736 2737 /* Enable any GPEs as appropriate and requested by the user. */ 2738 acpi_wake_prep_walk(state); 2739 slp_state = ACPI_SS_GPE_SET; 2740 2741 /* 2742 * Inform all devices that we are going to sleep. If at least one 2743 * device fails, DEVICE_SUSPEND() automatically resumes the tree. 2744 * 2745 * XXX Note that a better two-pass approach with a 'veto' pass 2746 * followed by a "real thing" pass would be better, but the current 2747 * bus interface does not provide for this. 2748 */ 2749 if (DEVICE_SUSPEND(root_bus) != 0) { 2750 device_printf(sc->acpi_dev, "device_suspend failed\n"); 2751 goto backout; 2752 } 2753 slp_state = ACPI_SS_DEV_SUSPEND; 2754 2755 /* If testing device suspend only, back out of everything here. */ 2756 if (acpi_susp_bounce) 2757 goto backout; 2758 2759 status = AcpiEnterSleepStatePrep(state); 2760 if (ACPI_FAILURE(status)) { 2761 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2762 AcpiFormatException(status)); 2763 goto backout; 2764 } 2765 slp_state = ACPI_SS_SLP_PREP; 2766 2767 if (sc->acpi_sleep_delay > 0) 2768 DELAY(sc->acpi_sleep_delay * 1000000); 2769 2770 if (state != ACPI_STATE_S1) { 2771 if (acpi_sleep_machdep(sc, state)) 2772 goto backout; 2773 2774 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 2775 if (state == ACPI_STATE_S4) 2776 AcpiEnable(); 2777 } else { 2778 intr = intr_disable(); 2779 status = AcpiEnterSleepState(state, acpi_sleep_flags); 2780 intr_restore(intr); 2781 if (ACPI_FAILURE(status)) { 2782 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 2783 AcpiFormatException(status)); 2784 goto backout; 2785 } 2786 } 2787 slp_state = ACPI_SS_SLEPT; 2788 2789 /* 2790 * Back out state according to how far along we got in the suspend 2791 * process. This handles both the error and success cases. 2792 */ 2793 backout: 2794 if (slp_state >= ACPI_SS_GPE_SET) { 2795 acpi_wake_prep_walk(state); 2796 sc->acpi_sstate = ACPI_STATE_S0; 2797 } 2798 if (slp_state >= ACPI_SS_SLP_PREP) { 2799 AcpiLeaveSleepStatePrep(state, acpi_sleep_flags); 2800 AcpiLeaveSleepState(state); 2801 } 2802 if (slp_state >= ACPI_SS_DEV_SUSPEND) 2803 DEVICE_RESUME(root_bus); 2804 if (slp_state >= ACPI_SS_SLEPT) { 2805 acpi_resync_clock(sc); 2806 acpi_enable_fixed_events(sc); 2807 } 2808 sc->acpi_next_sstate = 0; 2809 2810 mtx_unlock(&Giant); 2811 2812 if (smp_started) { 2813 thread_lock(curthread); 2814 sched_unbind(curthread); 2815 thread_unlock(curthread); 2816 } 2817 2818 EVENTHANDLER_INVOKE(power_resume); 2819 2820 /* Allow another sleep request after a while. */ 2821 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); 2822 2823 /* Run /etc/rc.resume after we are back. */ 2824 if (devctl_process_running()) 2825 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state); 2826 2827 return_ACPI_STATUS (status); 2828 } 2829 2830 static void 2831 acpi_resync_clock(struct acpi_softc *sc) 2832 { 2833 #ifdef __amd64__ 2834 if (!acpi_reset_clock) 2835 return; 2836 2837 /* 2838 * Warm up timecounter again and reset system clock. 2839 */ 2840 (void)timecounter->tc_get_timecount(timecounter); 2841 (void)timecounter->tc_get_timecount(timecounter); 2842 inittodr(time_second + sc->acpi_sleep_delay); 2843 #endif 2844 } 2845 2846 /* Enable or disable the device's wake GPE. */ 2847 int 2848 acpi_wake_set_enable(device_t dev, int enable) 2849 { 2850 struct acpi_prw_data prw; 2851 ACPI_STATUS status; 2852 int flags; 2853 2854 /* Make sure the device supports waking the system and get the GPE. */ 2855 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 2856 return (ENXIO); 2857 2858 flags = acpi_get_flags(dev); 2859 if (enable) { 2860 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 2861 ACPI_GPE_ENABLE); 2862 if (ACPI_FAILURE(status)) { 2863 device_printf(dev, "enable wake failed\n"); 2864 return (ENXIO); 2865 } 2866 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); 2867 } else { 2868 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 2869 ACPI_GPE_DISABLE); 2870 if (ACPI_FAILURE(status)) { 2871 device_printf(dev, "disable wake failed\n"); 2872 return (ENXIO); 2873 } 2874 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); 2875 } 2876 2877 return (0); 2878 } 2879 2880 static int 2881 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate) 2882 { 2883 struct acpi_prw_data prw; 2884 device_t dev; 2885 2886 /* Check that this is a wake-capable device and get its GPE. */ 2887 if (acpi_parse_prw(handle, &prw) != 0) 2888 return (ENXIO); 2889 dev = acpi_get_device(handle); 2890 2891 /* 2892 * The destination sleep state must be less than (i.e., higher power) 2893 * or equal to the value specified by _PRW. If this GPE cannot be 2894 * enabled for the next sleep state, then disable it. If it can and 2895 * the user requested it be enabled, turn on any required power resources 2896 * and set _PSW. 2897 */ 2898 if (sstate > prw.lowest_wake) { 2899 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_DISABLE); 2900 if (bootverbose) 2901 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n", 2902 acpi_name(handle), sstate); 2903 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) { 2904 acpi_pwr_wake_enable(handle, 1); 2905 acpi_SetInteger(handle, "_PSW", 1); 2906 if (bootverbose) 2907 device_printf(dev, "wake_prep enabled for %s (S%d)\n", 2908 acpi_name(handle), sstate); 2909 } 2910 2911 return (0); 2912 } 2913 2914 static int 2915 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate) 2916 { 2917 struct acpi_prw_data prw; 2918 device_t dev; 2919 2920 /* 2921 * Check that this is a wake-capable device and get its GPE. Return 2922 * now if the user didn't enable this device for wake. 2923 */ 2924 if (acpi_parse_prw(handle, &prw) != 0) 2925 return (ENXIO); 2926 dev = acpi_get_device(handle); 2927 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0) 2928 return (0); 2929 2930 /* 2931 * If this GPE couldn't be enabled for the previous sleep state, it was 2932 * disabled before going to sleep so re-enable it. If it was enabled, 2933 * clear _PSW and turn off any power resources it used. 2934 */ 2935 if (sstate > prw.lowest_wake) { 2936 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_ENABLE); 2937 if (bootverbose) 2938 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle)); 2939 } else { 2940 acpi_SetInteger(handle, "_PSW", 0); 2941 acpi_pwr_wake_enable(handle, 0); 2942 if (bootverbose) 2943 device_printf(dev, "run_prep cleaned up for %s\n", 2944 acpi_name(handle)); 2945 } 2946 2947 return (0); 2948 } 2949 2950 static ACPI_STATUS 2951 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 2952 { 2953 int sstate; 2954 2955 /* If suspending, run the sleep prep function, otherwise wake. */ 2956 sstate = *(int *)context; 2957 if (AcpiGbl_SystemAwakeAndRunning) 2958 acpi_wake_sleep_prep(handle, sstate); 2959 else 2960 acpi_wake_run_prep(handle, sstate); 2961 return (AE_OK); 2962 } 2963 2964 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */ 2965 static int 2966 acpi_wake_prep_walk(int sstate) 2967 { 2968 ACPI_HANDLE sb_handle; 2969 2970 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) 2971 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100, 2972 acpi_wake_prep, NULL, &sstate, NULL); 2973 return (0); 2974 } 2975 2976 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */ 2977 static int 2978 acpi_wake_sysctl_walk(device_t dev) 2979 { 2980 int error, i, numdevs; 2981 device_t *devlist; 2982 device_t child; 2983 ACPI_STATUS status; 2984 2985 error = device_get_children(dev, &devlist, &numdevs); 2986 if (error != 0 || numdevs == 0) { 2987 if (numdevs == 0) 2988 free(devlist, M_TEMP); 2989 return (error); 2990 } 2991 for (i = 0; i < numdevs; i++) { 2992 child = devlist[i]; 2993 acpi_wake_sysctl_walk(child); 2994 if (!device_is_attached(child)) 2995 continue; 2996 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL); 2997 if (ACPI_SUCCESS(status)) { 2998 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child), 2999 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO, 3000 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0, 3001 acpi_wake_set_sysctl, "I", "Device set to wake the system"); 3002 } 3003 } 3004 free(devlist, M_TEMP); 3005 3006 return (0); 3007 } 3008 3009 /* Enable or disable wake from userland. */ 3010 static int 3011 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS) 3012 { 3013 int enable, error; 3014 device_t dev; 3015 3016 dev = (device_t)arg1; 3017 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0; 3018 3019 error = sysctl_handle_int(oidp, &enable, 0, req); 3020 if (error != 0 || req->newptr == NULL) 3021 return (error); 3022 if (enable != 0 && enable != 1) 3023 return (EINVAL); 3024 3025 return (acpi_wake_set_enable(dev, enable)); 3026 } 3027 3028 /* Parse a device's _PRW into a structure. */ 3029 int 3030 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) 3031 { 3032 ACPI_STATUS status; 3033 ACPI_BUFFER prw_buffer; 3034 ACPI_OBJECT *res, *res2; 3035 int error, i, power_count; 3036 3037 if (h == NULL || prw == NULL) 3038 return (EINVAL); 3039 3040 /* 3041 * The _PRW object (7.2.9) is only required for devices that have the 3042 * ability to wake the system from a sleeping state. 3043 */ 3044 error = EINVAL; 3045 prw_buffer.Pointer = NULL; 3046 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 3047 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 3048 if (ACPI_FAILURE(status)) 3049 return (ENOENT); 3050 res = (ACPI_OBJECT *)prw_buffer.Pointer; 3051 if (res == NULL) 3052 return (ENOENT); 3053 if (!ACPI_PKG_VALID(res, 2)) 3054 goto out; 3055 3056 /* 3057 * Element 1 of the _PRW object: 3058 * The lowest power system sleeping state that can be entered while still 3059 * providing wake functionality. The sleeping state being entered must 3060 * be less than (i.e., higher power) or equal to this value. 3061 */ 3062 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) 3063 goto out; 3064 3065 /* 3066 * Element 0 of the _PRW object: 3067 */ 3068 switch (res->Package.Elements[0].Type) { 3069 case ACPI_TYPE_INTEGER: 3070 /* 3071 * If the data type of this package element is numeric, then this 3072 * _PRW package element is the bit index in the GPEx_EN, in the 3073 * GPE blocks described in the FADT, of the enable bit that is 3074 * enabled for the wake event. 3075 */ 3076 prw->gpe_handle = NULL; 3077 prw->gpe_bit = res->Package.Elements[0].Integer.Value; 3078 error = 0; 3079 break; 3080 case ACPI_TYPE_PACKAGE: 3081 /* 3082 * If the data type of this package element is a package, then this 3083 * _PRW package element is itself a package containing two 3084 * elements. The first is an object reference to the GPE Block 3085 * device that contains the GPE that will be triggered by the wake 3086 * event. The second element is numeric and it contains the bit 3087 * index in the GPEx_EN, in the GPE Block referenced by the 3088 * first element in the package, of the enable bit that is enabled for 3089 * the wake event. 3090 * 3091 * For example, if this field is a package then it is of the form: 3092 * Package() {\_SB.PCI0.ISA.GPE, 2} 3093 */ 3094 res2 = &res->Package.Elements[0]; 3095 if (!ACPI_PKG_VALID(res2, 2)) 3096 goto out; 3097 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 3098 if (prw->gpe_handle == NULL) 3099 goto out; 3100 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) 3101 goto out; 3102 error = 0; 3103 break; 3104 default: 3105 goto out; 3106 } 3107 3108 /* Elements 2 to N of the _PRW object are power resources. */ 3109 power_count = res->Package.Count - 2; 3110 if (power_count > ACPI_PRW_MAX_POWERRES) { 3111 printf("ACPI device %s has too many power resources\n", acpi_name(h)); 3112 power_count = 0; 3113 } 3114 prw->power_res_count = power_count; 3115 for (i = 0; i < power_count; i++) 3116 prw->power_res[i] = res->Package.Elements[i]; 3117 3118 out: 3119 if (prw_buffer.Pointer != NULL) 3120 AcpiOsFree(prw_buffer.Pointer); 3121 return (error); 3122 } 3123 3124 /* 3125 * ACPI Event Handlers 3126 */ 3127 3128 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 3129 3130 static void 3131 acpi_system_eventhandler_sleep(void *arg, int state) 3132 { 3133 struct acpi_softc *sc = (struct acpi_softc *)arg; 3134 int ret; 3135 3136 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 3137 3138 /* Check if button action is disabled or unknown. */ 3139 if (state == ACPI_STATE_UNKNOWN) 3140 return; 3141 3142 /* Request that the system prepare to enter the given suspend state. */ 3143 ret = acpi_ReqSleepState(sc, state); 3144 if (ret != 0) 3145 device_printf(sc->acpi_dev, 3146 "request to enter state S%d failed (err %d)\n", state, ret); 3147 3148 return_VOID; 3149 } 3150 3151 static void 3152 acpi_system_eventhandler_wakeup(void *arg, int state) 3153 { 3154 3155 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 3156 3157 /* Currently, nothing to do for wakeup. */ 3158 3159 return_VOID; 3160 } 3161 3162 /* 3163 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 3164 */ 3165 static void 3166 acpi_invoke_sleep_eventhandler(void *context) 3167 { 3168 3169 EVENTHANDLER_INVOKE(acpi_sleep_event, *(int *)context); 3170 } 3171 3172 static void 3173 acpi_invoke_wake_eventhandler(void *context) 3174 { 3175 3176 EVENTHANDLER_INVOKE(acpi_wakeup_event, *(int *)context); 3177 } 3178 3179 UINT32 3180 acpi_event_power_button_sleep(void *context) 3181 { 3182 struct acpi_softc *sc = (struct acpi_softc *)context; 3183 3184 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3185 3186 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3187 acpi_invoke_sleep_eventhandler, &sc->acpi_power_button_sx))) 3188 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3189 return_VALUE (ACPI_INTERRUPT_HANDLED); 3190 } 3191 3192 UINT32 3193 acpi_event_power_button_wake(void *context) 3194 { 3195 struct acpi_softc *sc = (struct acpi_softc *)context; 3196 3197 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3198 3199 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3200 acpi_invoke_wake_eventhandler, &sc->acpi_power_button_sx))) 3201 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3202 return_VALUE (ACPI_INTERRUPT_HANDLED); 3203 } 3204 3205 UINT32 3206 acpi_event_sleep_button_sleep(void *context) 3207 { 3208 struct acpi_softc *sc = (struct acpi_softc *)context; 3209 3210 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3211 3212 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3213 acpi_invoke_sleep_eventhandler, &sc->acpi_sleep_button_sx))) 3214 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3215 return_VALUE (ACPI_INTERRUPT_HANDLED); 3216 } 3217 3218 UINT32 3219 acpi_event_sleep_button_wake(void *context) 3220 { 3221 struct acpi_softc *sc = (struct acpi_softc *)context; 3222 3223 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3224 3225 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3226 acpi_invoke_wake_eventhandler, &sc->acpi_sleep_button_sx))) 3227 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3228 return_VALUE (ACPI_INTERRUPT_HANDLED); 3229 } 3230 3231 /* 3232 * XXX This static buffer is suboptimal. There is no locking so only 3233 * use this for single-threaded callers. 3234 */ 3235 char * 3236 acpi_name(ACPI_HANDLE handle) 3237 { 3238 ACPI_BUFFER buf; 3239 static char data[256]; 3240 3241 buf.Length = sizeof(data); 3242 buf.Pointer = data; 3243 3244 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf))) 3245 return (data); 3246 return ("(unknown)"); 3247 } 3248 3249 /* 3250 * Debugging/bug-avoidance. Avoid trying to fetch info on various 3251 * parts of the namespace. 3252 */ 3253 int 3254 acpi_avoid(ACPI_HANDLE handle) 3255 { 3256 char *cp, *env, *np; 3257 int len; 3258 3259 np = acpi_name(handle); 3260 if (*np == '\\') 3261 np++; 3262 if ((env = getenv("debug.acpi.avoid")) == NULL) 3263 return (0); 3264 3265 /* Scan the avoid list checking for a match */ 3266 cp = env; 3267 for (;;) { 3268 while (*cp != 0 && isspace(*cp)) 3269 cp++; 3270 if (*cp == 0) 3271 break; 3272 len = 0; 3273 while (cp[len] != 0 && !isspace(cp[len])) 3274 len++; 3275 if (!strncmp(cp, np, len)) { 3276 freeenv(env); 3277 return(1); 3278 } 3279 cp += len; 3280 } 3281 freeenv(env); 3282 3283 return (0); 3284 } 3285 3286 /* 3287 * Debugging/bug-avoidance. Disable ACPI subsystem components. 3288 */ 3289 int 3290 acpi_disabled(char *subsys) 3291 { 3292 char *cp, *env; 3293 int len; 3294 3295 if ((env = getenv("debug.acpi.disabled")) == NULL) 3296 return (0); 3297 if (strcmp(env, "all") == 0) { 3298 freeenv(env); 3299 return (1); 3300 } 3301 3302 /* Scan the disable list, checking for a match. */ 3303 cp = env; 3304 for (;;) { 3305 while (*cp != '\0' && isspace(*cp)) 3306 cp++; 3307 if (*cp == '\0') 3308 break; 3309 len = 0; 3310 while (cp[len] != '\0' && !isspace(cp[len])) 3311 len++; 3312 if (strncmp(cp, subsys, len) == 0) { 3313 freeenv(env); 3314 return (1); 3315 } 3316 cp += len; 3317 } 3318 freeenv(env); 3319 3320 return (0); 3321 } 3322 3323 /* 3324 * Control interface. 3325 * 3326 * We multiplex ioctls for all participating ACPI devices here. Individual 3327 * drivers wanting to be accessible via /dev/acpi should use the 3328 * register/deregister interface to make their handlers visible. 3329 */ 3330 struct acpi_ioctl_hook 3331 { 3332 TAILQ_ENTRY(acpi_ioctl_hook) link; 3333 u_long cmd; 3334 acpi_ioctl_fn fn; 3335 void *arg; 3336 }; 3337 3338 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 3339 static int acpi_ioctl_hooks_initted; 3340 3341 int 3342 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 3343 { 3344 struct acpi_ioctl_hook *hp; 3345 3346 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 3347 return (ENOMEM); 3348 hp->cmd = cmd; 3349 hp->fn = fn; 3350 hp->arg = arg; 3351 3352 ACPI_LOCK(acpi); 3353 if (acpi_ioctl_hooks_initted == 0) { 3354 TAILQ_INIT(&acpi_ioctl_hooks); 3355 acpi_ioctl_hooks_initted = 1; 3356 } 3357 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 3358 ACPI_UNLOCK(acpi); 3359 3360 return (0); 3361 } 3362 3363 void 3364 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 3365 { 3366 struct acpi_ioctl_hook *hp; 3367 3368 ACPI_LOCK(acpi); 3369 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 3370 if (hp->cmd == cmd && hp->fn == fn) 3371 break; 3372 3373 if (hp != NULL) { 3374 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 3375 free(hp, M_ACPIDEV); 3376 } 3377 ACPI_UNLOCK(acpi); 3378 } 3379 3380 static int 3381 acpiopen(struct cdev *dev, int flag, int fmt, struct thread *td) 3382 { 3383 return (0); 3384 } 3385 3386 static int 3387 acpiclose(struct cdev *dev, int flag, int fmt, struct thread *td) 3388 { 3389 return (0); 3390 } 3391 3392 static int 3393 acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 3394 { 3395 struct acpi_softc *sc; 3396 struct acpi_ioctl_hook *hp; 3397 int error, state; 3398 3399 error = 0; 3400 hp = NULL; 3401 sc = dev->si_drv1; 3402 3403 /* 3404 * Scan the list of registered ioctls, looking for handlers. 3405 */ 3406 ACPI_LOCK(acpi); 3407 if (acpi_ioctl_hooks_initted) 3408 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 3409 if (hp->cmd == cmd) 3410 break; 3411 } 3412 ACPI_UNLOCK(acpi); 3413 if (hp) 3414 return (hp->fn(cmd, addr, hp->arg)); 3415 3416 /* 3417 * Core ioctls are not permitted for non-writable user. 3418 * Currently, other ioctls just fetch information. 3419 * Not changing system behavior. 3420 */ 3421 if ((flag & FWRITE) == 0) 3422 return (EPERM); 3423 3424 /* Core system ioctls. */ 3425 switch (cmd) { 3426 case ACPIIO_REQSLPSTATE: 3427 state = *(int *)addr; 3428 if (state != ACPI_STATE_S5) 3429 return (acpi_ReqSleepState(sc, state)); 3430 device_printf(sc->acpi_dev, "power off via acpi ioctl not supported\n"); 3431 error = EOPNOTSUPP; 3432 break; 3433 case ACPIIO_ACKSLPSTATE: 3434 error = *(int *)addr; 3435 error = acpi_AckSleepState(sc->acpi_clone, error); 3436 break; 3437 case ACPIIO_SETSLPSTATE: /* DEPRECATED */ 3438 state = *(int *)addr; 3439 if (state < ACPI_STATE_S0 || state > ACPI_S_STATES_MAX) 3440 return (EINVAL); 3441 if (!acpi_sleep_states[state]) 3442 return (EOPNOTSUPP); 3443 if (ACPI_FAILURE(acpi_SetSleepState(sc, state))) 3444 error = ENXIO; 3445 break; 3446 default: 3447 error = ENXIO; 3448 break; 3449 } 3450 3451 return (error); 3452 } 3453 3454 static int 3455 acpi_sname2sstate(const char *sname) 3456 { 3457 int sstate; 3458 3459 if (toupper(sname[0]) == 'S') { 3460 sstate = sname[1] - '0'; 3461 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5 && 3462 sname[2] == '\0') 3463 return (sstate); 3464 } else if (strcasecmp(sname, "NONE") == 0) 3465 return (ACPI_STATE_UNKNOWN); 3466 return (-1); 3467 } 3468 3469 static const char * 3470 acpi_sstate2sname(int sstate) 3471 { 3472 static const char *snames[] = { "S0", "S1", "S2", "S3", "S4", "S5" }; 3473 3474 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5) 3475 return (snames[sstate]); 3476 else if (sstate == ACPI_STATE_UNKNOWN) 3477 return ("NONE"); 3478 return (NULL); 3479 } 3480 3481 static int 3482 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3483 { 3484 int error; 3485 struct sbuf sb; 3486 UINT8 state; 3487 3488 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND); 3489 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++) 3490 if (acpi_sleep_states[state]) 3491 sbuf_printf(&sb, "%s ", acpi_sstate2sname(state)); 3492 sbuf_trim(&sb); 3493 sbuf_finish(&sb); 3494 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 3495 sbuf_delete(&sb); 3496 return (error); 3497 } 3498 3499 static int 3500 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3501 { 3502 char sleep_state[10]; 3503 int error, new_state, old_state; 3504 3505 old_state = *(int *)oidp->oid_arg1; 3506 strlcpy(sleep_state, acpi_sstate2sname(old_state), sizeof(sleep_state)); 3507 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 3508 if (error == 0 && req->newptr != NULL) { 3509 new_state = acpi_sname2sstate(sleep_state); 3510 if (new_state < ACPI_STATE_S1) 3511 return (EINVAL); 3512 if (new_state < ACPI_S_STATE_COUNT && !acpi_sleep_states[new_state]) 3513 return (EOPNOTSUPP); 3514 if (new_state != old_state) 3515 *(int *)oidp->oid_arg1 = new_state; 3516 } 3517 return (error); 3518 } 3519 3520 /* Inform devctl(4) when we receive a Notify. */ 3521 void 3522 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 3523 { 3524 char notify_buf[16]; 3525 ACPI_BUFFER handle_buf; 3526 ACPI_STATUS status; 3527 3528 if (subsystem == NULL) 3529 return; 3530 3531 handle_buf.Pointer = NULL; 3532 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 3533 status = AcpiNsHandleToPathname(h, &handle_buf); 3534 if (ACPI_FAILURE(status)) 3535 return; 3536 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 3537 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 3538 AcpiOsFree(handle_buf.Pointer); 3539 } 3540 3541 #ifdef ACPI_DEBUG 3542 /* 3543 * Support for parsing debug options from the kernel environment. 3544 * 3545 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 3546 * by specifying the names of the bits in the debug.acpi.layer and 3547 * debug.acpi.level environment variables. Bits may be unset by 3548 * prefixing the bit name with !. 3549 */ 3550 struct debugtag 3551 { 3552 char *name; 3553 UINT32 value; 3554 }; 3555 3556 static struct debugtag dbg_layer[] = { 3557 {"ACPI_UTILITIES", ACPI_UTILITIES}, 3558 {"ACPI_HARDWARE", ACPI_HARDWARE}, 3559 {"ACPI_EVENTS", ACPI_EVENTS}, 3560 {"ACPI_TABLES", ACPI_TABLES}, 3561 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 3562 {"ACPI_PARSER", ACPI_PARSER}, 3563 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 3564 {"ACPI_EXECUTER", ACPI_EXECUTER}, 3565 {"ACPI_RESOURCES", ACPI_RESOURCES}, 3566 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 3567 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 3568 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 3569 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 3570 3571 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 3572 {"ACPI_BATTERY", ACPI_BATTERY}, 3573 {"ACPI_BUS", ACPI_BUS}, 3574 {"ACPI_BUTTON", ACPI_BUTTON}, 3575 {"ACPI_EC", ACPI_EC}, 3576 {"ACPI_FAN", ACPI_FAN}, 3577 {"ACPI_POWERRES", ACPI_POWERRES}, 3578 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 3579 {"ACPI_THERMAL", ACPI_THERMAL}, 3580 {"ACPI_TIMER", ACPI_TIMER}, 3581 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 3582 {NULL, 0} 3583 }; 3584 3585 static struct debugtag dbg_level[] = { 3586 {"ACPI_LV_INIT", ACPI_LV_INIT}, 3587 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 3588 {"ACPI_LV_INFO", ACPI_LV_INFO}, 3589 {"ACPI_LV_REPAIR", ACPI_LV_REPAIR}, 3590 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 3591 3592 /* Trace verbosity level 1 [Standard Trace Level] */ 3593 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 3594 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 3595 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 3596 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 3597 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 3598 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 3599 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 3600 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 3601 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 3602 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 3603 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 3604 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 3605 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 3606 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 3607 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 3608 3609 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 3610 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 3611 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 3612 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 3613 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 3614 {"ACPI_LV_ALL", ACPI_LV_ALL}, 3615 3616 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 3617 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 3618 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 3619 {"ACPI_LV_IO", ACPI_LV_IO}, 3620 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 3621 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 3622 3623 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 3624 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 3625 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 3626 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 3627 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 3628 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 3629 {NULL, 0} 3630 }; 3631 3632 static void 3633 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 3634 { 3635 char *ep; 3636 int i, l; 3637 int set; 3638 3639 while (*cp) { 3640 if (isspace(*cp)) { 3641 cp++; 3642 continue; 3643 } 3644 ep = cp; 3645 while (*ep && !isspace(*ep)) 3646 ep++; 3647 if (*cp == '!') { 3648 set = 0; 3649 cp++; 3650 if (cp == ep) 3651 continue; 3652 } else { 3653 set = 1; 3654 } 3655 l = ep - cp; 3656 for (i = 0; tag[i].name != NULL; i++) { 3657 if (!strncmp(cp, tag[i].name, l)) { 3658 if (set) 3659 *flag |= tag[i].value; 3660 else 3661 *flag &= ~tag[i].value; 3662 } 3663 } 3664 cp = ep; 3665 } 3666 } 3667 3668 static void 3669 acpi_set_debugging(void *junk) 3670 { 3671 char *layer, *level; 3672 3673 if (cold) { 3674 AcpiDbgLayer = 0; 3675 AcpiDbgLevel = 0; 3676 } 3677 3678 layer = getenv("debug.acpi.layer"); 3679 level = getenv("debug.acpi.level"); 3680 if (layer == NULL && level == NULL) 3681 return; 3682 3683 printf("ACPI set debug"); 3684 if (layer != NULL) { 3685 if (strcmp("NONE", layer) != 0) 3686 printf(" layer '%s'", layer); 3687 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer); 3688 freeenv(layer); 3689 } 3690 if (level != NULL) { 3691 if (strcmp("NONE", level) != 0) 3692 printf(" level '%s'", level); 3693 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel); 3694 freeenv(level); 3695 } 3696 printf("\n"); 3697 } 3698 3699 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 3700 NULL); 3701 3702 static int 3703 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 3704 { 3705 int error, *dbg; 3706 struct debugtag *tag; 3707 struct sbuf sb; 3708 3709 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 3710 return (ENOMEM); 3711 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 3712 tag = &dbg_layer[0]; 3713 dbg = &AcpiDbgLayer; 3714 } else { 3715 tag = &dbg_level[0]; 3716 dbg = &AcpiDbgLevel; 3717 } 3718 3719 /* Get old values if this is a get request. */ 3720 ACPI_SERIAL_BEGIN(acpi); 3721 if (*dbg == 0) { 3722 sbuf_cpy(&sb, "NONE"); 3723 } else if (req->newptr == NULL) { 3724 for (; tag->name != NULL; tag++) { 3725 if ((*dbg & tag->value) == tag->value) 3726 sbuf_printf(&sb, "%s ", tag->name); 3727 } 3728 } 3729 sbuf_trim(&sb); 3730 sbuf_finish(&sb); 3731 3732 /* Copy out the old values to the user. */ 3733 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb)); 3734 sbuf_delete(&sb); 3735 3736 /* If the user is setting a string, parse it. */ 3737 if (error == 0 && req->newptr != NULL) { 3738 *dbg = 0; 3739 setenv((char *)oidp->oid_arg1, (char *)req->newptr); 3740 acpi_set_debugging(NULL); 3741 } 3742 ACPI_SERIAL_END(acpi); 3743 3744 return (error); 3745 } 3746 3747 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 3748 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 3749 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 3750 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 3751 #endif /* ACPI_DEBUG */ 3752 3753 static int 3754 acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS) 3755 { 3756 int error; 3757 int old; 3758 3759 old = acpi_debug_objects; 3760 error = sysctl_handle_int(oidp, &acpi_debug_objects, 0, req); 3761 if (error != 0 || req->newptr == NULL) 3762 return (error); 3763 if (old == acpi_debug_objects || (old && acpi_debug_objects)) 3764 return (0); 3765 3766 ACPI_SERIAL_BEGIN(acpi); 3767 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE; 3768 ACPI_SERIAL_END(acpi); 3769 3770 return (0); 3771 } 3772 3773 static int 3774 acpi_parse_interfaces(char *str, struct acpi_interface *iface) 3775 { 3776 char *p; 3777 size_t len; 3778 int i, j; 3779 3780 p = str; 3781 while (isspace(*p) || *p == ',') 3782 p++; 3783 len = strlen(p); 3784 if (len == 0) 3785 return (0); 3786 p = strdup(p, M_TEMP); 3787 for (i = 0; i < len; i++) 3788 if (p[i] == ',') 3789 p[i] = '\0'; 3790 i = j = 0; 3791 while (i < len) 3792 if (isspace(p[i]) || p[i] == '\0') 3793 i++; 3794 else { 3795 i += strlen(p + i) + 1; 3796 j++; 3797 } 3798 if (j == 0) { 3799 free(p, M_TEMP); 3800 return (0); 3801 } 3802 iface->data = malloc(sizeof(*iface->data) * j, M_TEMP, M_WAITOK); 3803 iface->num = j; 3804 i = j = 0; 3805 while (i < len) 3806 if (isspace(p[i]) || p[i] == '\0') 3807 i++; 3808 else { 3809 iface->data[j] = p + i; 3810 i += strlen(p + i) + 1; 3811 j++; 3812 } 3813 3814 return (j); 3815 } 3816 3817 static void 3818 acpi_free_interfaces(struct acpi_interface *iface) 3819 { 3820 3821 free(iface->data[0], M_TEMP); 3822 free(iface->data, M_TEMP); 3823 } 3824 3825 static void 3826 acpi_reset_interfaces(device_t dev) 3827 { 3828 struct acpi_interface list; 3829 ACPI_STATUS status; 3830 int i; 3831 3832 if (acpi_parse_interfaces(acpi_install_interface, &list) > 0) { 3833 for (i = 0; i < list.num; i++) { 3834 status = AcpiInstallInterface(list.data[i]); 3835 if (ACPI_FAILURE(status)) 3836 device_printf(dev, 3837 "failed to install _OSI(\"%s\"): %s\n", 3838 list.data[i], AcpiFormatException(status)); 3839 else if (bootverbose) 3840 device_printf(dev, "installed _OSI(\"%s\")\n", 3841 list.data[i]); 3842 } 3843 acpi_free_interfaces(&list); 3844 } 3845 if (acpi_parse_interfaces(acpi_remove_interface, &list) > 0) { 3846 for (i = 0; i < list.num; i++) { 3847 status = AcpiRemoveInterface(list.data[i]); 3848 if (ACPI_FAILURE(status)) 3849 device_printf(dev, 3850 "failed to remove _OSI(\"%s\"): %s\n", 3851 list.data[i], AcpiFormatException(status)); 3852 else if (bootverbose) 3853 device_printf(dev, "removed _OSI(\"%s\")\n", 3854 list.data[i]); 3855 } 3856 acpi_free_interfaces(&list); 3857 } 3858 } 3859 3860 static int 3861 acpi_pm_func(u_long cmd, void *arg, ...) 3862 { 3863 int state, acpi_state; 3864 int error; 3865 struct acpi_softc *sc; 3866 va_list ap; 3867 3868 error = 0; 3869 switch (cmd) { 3870 case POWER_CMD_SUSPEND: 3871 sc = (struct acpi_softc *)arg; 3872 if (sc == NULL) { 3873 error = EINVAL; 3874 goto out; 3875 } 3876 3877 va_start(ap, arg); 3878 state = va_arg(ap, int); 3879 va_end(ap); 3880 3881 switch (state) { 3882 case POWER_SLEEP_STATE_STANDBY: 3883 acpi_state = sc->acpi_standby_sx; 3884 break; 3885 case POWER_SLEEP_STATE_SUSPEND: 3886 acpi_state = sc->acpi_suspend_sx; 3887 break; 3888 case POWER_SLEEP_STATE_HIBERNATE: 3889 acpi_state = ACPI_STATE_S4; 3890 break; 3891 default: 3892 error = EINVAL; 3893 goto out; 3894 } 3895 3896 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state))) 3897 error = ENXIO; 3898 break; 3899 default: 3900 error = EINVAL; 3901 goto out; 3902 } 3903 3904 out: 3905 return (error); 3906 } 3907 3908 static void 3909 acpi_pm_register(void *arg) 3910 { 3911 if (!cold || resource_disabled("acpi", 0)) 3912 return; 3913 3914 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 3915 } 3916 3917 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 3918