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 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 /* Supported sleep states. */ 101 static BOOLEAN acpi_sleep_states[ACPI_S_STATE_COUNT]; 102 103 static int acpi_modevent(struct module *mod, int event, void *junk); 104 static int acpi_probe(device_t dev); 105 static int acpi_attach(device_t dev); 106 static int acpi_suspend(device_t dev); 107 static int acpi_resume(device_t dev); 108 static int acpi_shutdown(device_t dev); 109 static device_t acpi_add_child(device_t bus, u_int order, const char *name, 110 int unit); 111 static int acpi_print_child(device_t bus, device_t child); 112 static void acpi_probe_nomatch(device_t bus, device_t child); 113 static void acpi_driver_added(device_t dev, driver_t *driver); 114 static int acpi_read_ivar(device_t dev, device_t child, int index, 115 uintptr_t *result); 116 static int acpi_write_ivar(device_t dev, device_t child, int index, 117 uintptr_t value); 118 static struct resource_list *acpi_get_rlist(device_t dev, device_t child); 119 static int acpi_sysres_alloc(device_t dev); 120 static struct resource *acpi_alloc_resource(device_t bus, device_t child, 121 int type, int *rid, u_long start, u_long end, 122 u_long count, u_int flags); 123 static int acpi_release_resource(device_t bus, device_t child, int type, 124 int rid, struct resource *r); 125 static void acpi_delete_resource(device_t bus, device_t child, int type, 126 int rid); 127 static uint32_t acpi_isa_get_logicalid(device_t dev); 128 static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count); 129 static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids); 130 static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev, 131 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters, 132 ACPI_BUFFER *ret); 133 static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, 134 void *context, void **retval); 135 static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev, 136 int max_depth, acpi_scan_cb_t user_fn, void *arg); 137 static int acpi_set_powerstate(device_t child, int state); 138 static int acpi_isa_pnp_probe(device_t bus, device_t child, 139 struct isa_pnp_id *ids); 140 static void acpi_probe_children(device_t bus); 141 static void acpi_probe_order(ACPI_HANDLE handle, int *order); 142 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, 143 void *context, void **status); 144 static void acpi_sleep_enable(void *arg); 145 static ACPI_STATUS acpi_sleep_disable(struct acpi_softc *sc); 146 static ACPI_STATUS acpi_EnterSleepState(struct acpi_softc *sc, int state); 147 static void acpi_shutdown_final(void *arg, int howto); 148 static void acpi_enable_fixed_events(struct acpi_softc *sc); 149 static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate); 150 static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate); 151 static int acpi_wake_prep_walk(int sstate); 152 static int acpi_wake_sysctl_walk(device_t dev); 153 static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS); 154 static void acpi_system_eventhandler_sleep(void *arg, int state); 155 static void acpi_system_eventhandler_wakeup(void *arg, int state); 156 static int acpi_sname2sstate(const char *sname); 157 static const char *acpi_sstate2sname(int sstate); 158 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 159 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 160 static int acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS); 161 static int acpi_pm_func(u_long cmd, void *arg, ...); 162 static int acpi_child_location_str_method(device_t acdev, device_t child, 163 char *buf, size_t buflen); 164 static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child, 165 char *buf, size_t buflen); 166 #if defined(__i386__) || defined(__amd64__) 167 static void acpi_enable_pcie(void); 168 #endif 169 static void acpi_hint_device_unit(device_t acdev, device_t child, 170 const char *name, int *unitp); 171 static void acpi_reset_interfaces(device_t dev); 172 173 static device_method_t acpi_methods[] = { 174 /* Device interface */ 175 DEVMETHOD(device_probe, acpi_probe), 176 DEVMETHOD(device_attach, acpi_attach), 177 DEVMETHOD(device_shutdown, acpi_shutdown), 178 DEVMETHOD(device_detach, bus_generic_detach), 179 DEVMETHOD(device_suspend, acpi_suspend), 180 DEVMETHOD(device_resume, acpi_resume), 181 182 /* Bus interface */ 183 DEVMETHOD(bus_add_child, acpi_add_child), 184 DEVMETHOD(bus_print_child, acpi_print_child), 185 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch), 186 DEVMETHOD(bus_driver_added, acpi_driver_added), 187 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 188 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 189 DEVMETHOD(bus_get_resource_list, acpi_get_rlist), 190 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 191 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 192 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 193 DEVMETHOD(bus_release_resource, acpi_release_resource), 194 DEVMETHOD(bus_delete_resource, acpi_delete_resource), 195 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method), 196 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method), 197 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 198 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 199 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 200 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 201 DEVMETHOD(bus_hint_device_unit, acpi_hint_device_unit), 202 203 /* ACPI bus */ 204 DEVMETHOD(acpi_id_probe, acpi_device_id_probe), 205 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj), 206 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep), 207 DEVMETHOD(acpi_scan_children, acpi_device_scan_children), 208 209 /* ISA emulation */ 210 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 211 212 {0, 0} 213 }; 214 215 static driver_t acpi_driver = { 216 "acpi", 217 acpi_methods, 218 sizeof(struct acpi_softc), 219 }; 220 221 static devclass_t acpi_devclass; 222 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0); 223 MODULE_VERSION(acpi, 1); 224 225 ACPI_SERIAL_DECL(acpi, "ACPI root bus"); 226 227 /* Local pools for managing system resources for ACPI child devices. */ 228 static struct rman acpi_rman_io, acpi_rman_mem; 229 230 #define ACPI_MINIMUM_AWAKETIME 5 231 232 /* Holds the description of the acpi0 device. */ 233 static char acpi_desc[ACPI_OEM_ID_SIZE + ACPI_OEM_TABLE_ID_SIZE + 2]; 234 235 SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging"); 236 static char acpi_ca_version[12]; 237 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, 238 acpi_ca_version, 0, "Version of Intel ACPI-CA"); 239 240 /* 241 * Allow overriding _OSI methods. 242 */ 243 static char acpi_install_interface[256]; 244 TUNABLE_STR("hw.acpi.install_interface", acpi_install_interface, 245 sizeof(acpi_install_interface)); 246 static char acpi_remove_interface[256]; 247 TUNABLE_STR("hw.acpi.remove_interface", acpi_remove_interface, 248 sizeof(acpi_remove_interface)); 249 250 /* 251 * Allow override of whether methods execute in parallel or not. 252 * Enable this for serial behavior, which fixes "AE_ALREADY_EXISTS" 253 * errors for AML that really can't handle parallel method execution. 254 * It is off by default since this breaks recursive methods and 255 * some IBMs use such code. 256 */ 257 static int acpi_serialize_methods; 258 TUNABLE_INT("hw.acpi.serialize_methods", &acpi_serialize_methods); 259 260 /* Allow users to dump Debug objects without ACPI debugger. */ 261 static int acpi_debug_objects; 262 TUNABLE_INT("debug.acpi.enable_debug_objects", &acpi_debug_objects); 263 SYSCTL_PROC(_debug_acpi, OID_AUTO, enable_debug_objects, 264 CTLFLAG_RW | CTLTYPE_INT, NULL, 0, acpi_debug_objects_sysctl, "I", 265 "Enable Debug objects"); 266 267 /* Allow the interpreter to ignore common mistakes in BIOS. */ 268 static int acpi_interpreter_slack = 1; 269 TUNABLE_INT("debug.acpi.interpreter_slack", &acpi_interpreter_slack); 270 SYSCTL_INT(_debug_acpi, OID_AUTO, interpreter_slack, CTLFLAG_RDTUN, 271 &acpi_interpreter_slack, 1, "Turn on interpreter slack mode."); 272 273 /* Reset system clock while resuming. XXX Remove once tested. */ 274 static int acpi_reset_clock = 1; 275 TUNABLE_INT("debug.acpi.reset_clock", &acpi_reset_clock); 276 SYSCTL_INT(_debug_acpi, OID_AUTO, reset_clock, CTLFLAG_RW, 277 &acpi_reset_clock, 1, "Reset system clock while resuming."); 278 279 /* Allow users to override quirks. */ 280 TUNABLE_INT("debug.acpi.quirks", &acpi_quirks); 281 282 static int acpi_susp_bounce; 283 SYSCTL_INT(_debug_acpi, OID_AUTO, suspend_bounce, CTLFLAG_RW, 284 &acpi_susp_bounce, 0, "Don't actually suspend, just test devices."); 285 286 /* 287 * ACPI can only be loaded as a module by the loader; activating it after 288 * system bootstrap time is not useful, and can be fatal to the system. 289 * It also cannot be unloaded, since the entire system bus hierarchy hangs 290 * off it. 291 */ 292 static int 293 acpi_modevent(struct module *mod, int event, void *junk) 294 { 295 switch (event) { 296 case MOD_LOAD: 297 if (!cold) { 298 printf("The ACPI driver cannot be loaded after boot.\n"); 299 return (EPERM); 300 } 301 break; 302 case MOD_UNLOAD: 303 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 304 return (EBUSY); 305 break; 306 default: 307 break; 308 } 309 return (0); 310 } 311 312 /* 313 * Perform early initialization. 314 */ 315 ACPI_STATUS 316 acpi_Startup(void) 317 { 318 static int started = 0; 319 ACPI_STATUS status; 320 int val; 321 322 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 323 324 /* Only run the startup code once. The MADT driver also calls this. */ 325 if (started) 326 return_VALUE (AE_OK); 327 started = 1; 328 329 /* 330 * Pre-allocate space for RSDT/XSDT and DSDT tables and allow resizing 331 * if more tables exist. 332 */ 333 if (ACPI_FAILURE(status = AcpiInitializeTables(NULL, 2, TRUE))) { 334 printf("ACPI: Table initialisation failed: %s\n", 335 AcpiFormatException(status)); 336 return_VALUE (status); 337 } 338 339 /* Set up any quirks we have for this system. */ 340 if (acpi_quirks == ACPI_Q_OK) 341 acpi_table_quirks(&acpi_quirks); 342 343 /* If the user manually set the disabled hint to 0, force-enable ACPI. */ 344 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0) 345 acpi_quirks &= ~ACPI_Q_BROKEN; 346 if (acpi_quirks & ACPI_Q_BROKEN) { 347 printf("ACPI disabled by blacklist. Contact your BIOS vendor.\n"); 348 status = AE_SUPPORT; 349 } 350 351 return_VALUE (status); 352 } 353 354 /* 355 * Detect ACPI and perform early initialisation. 356 */ 357 int 358 acpi_identify(void) 359 { 360 ACPI_TABLE_RSDP *rsdp; 361 ACPI_TABLE_HEADER *rsdt; 362 ACPI_PHYSICAL_ADDRESS paddr; 363 struct sbuf sb; 364 365 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 366 367 if (!cold) 368 return (ENXIO); 369 370 /* Check that we haven't been disabled with a hint. */ 371 if (resource_disabled("acpi", 0)) 372 return (ENXIO); 373 374 /* Check for other PM systems. */ 375 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 376 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 377 printf("ACPI identify failed, other PM system enabled.\n"); 378 return (ENXIO); 379 } 380 381 /* Initialize root tables. */ 382 if (ACPI_FAILURE(acpi_Startup())) { 383 printf("ACPI: Try disabling either ACPI or apic support.\n"); 384 return (ENXIO); 385 } 386 387 if ((paddr = AcpiOsGetRootPointer()) == 0 || 388 (rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP))) == NULL) 389 return (ENXIO); 390 if (rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress != 0) 391 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress; 392 else 393 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress; 394 AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP)); 395 396 if ((rsdt = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER))) == NULL) 397 return (ENXIO); 398 sbuf_new(&sb, acpi_desc, sizeof(acpi_desc), SBUF_FIXEDLEN); 399 sbuf_bcat(&sb, rsdt->OemId, ACPI_OEM_ID_SIZE); 400 sbuf_trim(&sb); 401 sbuf_putc(&sb, ' '); 402 sbuf_bcat(&sb, rsdt->OemTableId, ACPI_OEM_TABLE_ID_SIZE); 403 sbuf_trim(&sb); 404 sbuf_finish(&sb); 405 sbuf_delete(&sb); 406 AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER)); 407 408 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%x", ACPI_CA_VERSION); 409 410 return (0); 411 } 412 413 /* 414 * Fetch some descriptive data from ACPI to put in our attach message. 415 */ 416 static int 417 acpi_probe(device_t dev) 418 { 419 420 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 421 422 device_set_desc(dev, acpi_desc); 423 424 return_VALUE (0); 425 } 426 427 static int 428 acpi_attach(device_t dev) 429 { 430 struct acpi_softc *sc; 431 ACPI_STATUS status; 432 int error, state; 433 UINT32 flags; 434 UINT8 TypeA, TypeB; 435 char *env; 436 437 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 438 439 sc = device_get_softc(dev); 440 sc->acpi_dev = dev; 441 callout_init(&sc->susp_force_to, TRUE); 442 443 error = ENXIO; 444 445 /* Initialize resource manager. */ 446 acpi_rman_io.rm_type = RMAN_ARRAY; 447 acpi_rman_io.rm_start = 0; 448 acpi_rman_io.rm_end = 0xffff; 449 acpi_rman_io.rm_descr = "ACPI I/O ports"; 450 if (rman_init(&acpi_rman_io) != 0) 451 panic("acpi rman_init IO ports failed"); 452 acpi_rman_mem.rm_type = RMAN_ARRAY; 453 acpi_rman_mem.rm_start = 0; 454 acpi_rman_mem.rm_end = ~0ul; 455 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses"; 456 if (rman_init(&acpi_rman_mem) != 0) 457 panic("acpi rman_init memory failed"); 458 459 /* Initialise the ACPI mutex */ 460 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF); 461 462 /* 463 * Set the globals from our tunables. This is needed because ACPI-CA 464 * uses UINT8 for some values and we have no tunable_byte. 465 */ 466 AcpiGbl_AllMethodsSerialized = acpi_serialize_methods ? TRUE : FALSE; 467 AcpiGbl_EnableInterpreterSlack = acpi_interpreter_slack ? TRUE : FALSE; 468 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE; 469 470 #ifndef ACPI_DEBUG 471 /* 472 * Disable all debugging layers and levels. 473 */ 474 AcpiDbgLayer = 0; 475 AcpiDbgLevel = 0; 476 #endif 477 478 /* Start up the ACPI CA subsystem. */ 479 status = AcpiInitializeSubsystem(); 480 if (ACPI_FAILURE(status)) { 481 device_printf(dev, "Could not initialize Subsystem: %s\n", 482 AcpiFormatException(status)); 483 goto out; 484 } 485 486 /* Override OS interfaces if the user requested. */ 487 acpi_reset_interfaces(dev); 488 489 /* Load ACPI name space. */ 490 status = AcpiLoadTables(); 491 if (ACPI_FAILURE(status)) { 492 device_printf(dev, "Could not load Namespace: %s\n", 493 AcpiFormatException(status)); 494 goto out; 495 } 496 497 #if defined(__i386__) || defined(__amd64__) 498 /* Handle MCFG table if present. */ 499 acpi_enable_pcie(); 500 #endif 501 502 /* 503 * Note that some systems (specifically, those with namespace evaluation 504 * issues that require the avoidance of parts of the namespace) must 505 * avoid running _INI and _STA on everything, as well as dodging the final 506 * object init pass. 507 * 508 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 509 * 510 * XXX We should arrange for the object init pass after we have attached 511 * all our child devices, but on many systems it works here. 512 */ 513 flags = 0; 514 if (testenv("debug.acpi.avoid")) 515 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 516 517 /* Bring the hardware and basic handlers online. */ 518 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 519 device_printf(dev, "Could not enable ACPI: %s\n", 520 AcpiFormatException(status)); 521 goto out; 522 } 523 524 /* 525 * Call the ECDT probe function to provide EC functionality before 526 * the namespace has been evaluated. 527 * 528 * XXX This happens before the sysresource devices have been probed and 529 * attached so its resources come from nexus0. In practice, this isn't 530 * a problem but should be addressed eventually. 531 */ 532 acpi_ec_ecdt_probe(dev); 533 534 /* Bring device objects and regions online. */ 535 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 536 device_printf(dev, "Could not initialize ACPI objects: %s\n", 537 AcpiFormatException(status)); 538 goto out; 539 } 540 541 /* 542 * Setup our sysctl tree. 543 * 544 * XXX: This doesn't check to make sure that none of these fail. 545 */ 546 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 547 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 548 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 549 device_get_name(dev), CTLFLAG_RD, 0, ""); 550 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 551 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 552 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 553 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 554 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 555 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 556 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 557 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 558 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 559 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 560 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 561 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 562 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 563 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 564 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 565 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 566 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 567 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 568 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 569 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0, 570 "sleep delay"); 571 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 572 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode"); 573 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 574 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode"); 575 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 576 OID_AUTO, "disable_on_reboot", CTLFLAG_RW, 577 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system"); 578 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 579 OID_AUTO, "handle_reboot", CTLFLAG_RW, 580 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot"); 581 582 /* 583 * Default to 1 second before sleeping to give some machines time to 584 * stabilize. 585 */ 586 sc->acpi_sleep_delay = 1; 587 if (bootverbose) 588 sc->acpi_verbose = 1; 589 if ((env = getenv("hw.acpi.verbose")) != NULL) { 590 if (strcmp(env, "0") != 0) 591 sc->acpi_verbose = 1; 592 freeenv(env); 593 } 594 595 /* Only enable reboot by default if the FADT says it is available. */ 596 if (AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) 597 sc->acpi_handle_reboot = 1; 598 599 /* Only enable S4BIOS by default if the FACS says it is available. */ 600 if (AcpiGbl_FACS->Flags & ACPI_FACS_S4_BIOS_PRESENT) 601 sc->acpi_s4bios = 1; 602 603 /* Probe all supported sleep states. */ 604 acpi_sleep_states[ACPI_STATE_S0] = TRUE; 605 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++) 606 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) 607 acpi_sleep_states[state] = TRUE; 608 609 /* 610 * Dispatch the default sleep state to devices. The lid switch is set 611 * to UNKNOWN by default to avoid surprising users. 612 */ 613 sc->acpi_power_button_sx = acpi_sleep_states[ACPI_STATE_S5] ? 614 ACPI_STATE_S5 : ACPI_STATE_UNKNOWN; 615 sc->acpi_lid_switch_sx = ACPI_STATE_UNKNOWN; 616 sc->acpi_standby_sx = acpi_sleep_states[ACPI_STATE_S1] ? 617 ACPI_STATE_S1 : ACPI_STATE_UNKNOWN; 618 sc->acpi_suspend_sx = acpi_sleep_states[ACPI_STATE_S3] ? 619 ACPI_STATE_S3 : ACPI_STATE_UNKNOWN; 620 621 /* Pick the first valid sleep state for the sleep button default. */ 622 sc->acpi_sleep_button_sx = ACPI_STATE_UNKNOWN; 623 for (state = ACPI_STATE_S1; state <= ACPI_STATE_S4; state++) 624 if (acpi_sleep_states[state]) { 625 sc->acpi_sleep_button_sx = state; 626 break; 627 } 628 629 acpi_enable_fixed_events(sc); 630 631 /* 632 * Scan the namespace and attach/initialise children. 633 */ 634 635 /* Register our shutdown handler. */ 636 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 637 SHUTDOWN_PRI_LAST); 638 639 /* 640 * Register our acpi event handlers. 641 * XXX should be configurable eg. via userland policy manager. 642 */ 643 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 644 sc, ACPI_EVENT_PRI_LAST); 645 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 646 sc, ACPI_EVENT_PRI_LAST); 647 648 /* Flag our initial states. */ 649 sc->acpi_enabled = TRUE; 650 sc->acpi_sstate = ACPI_STATE_S0; 651 sc->acpi_sleep_disabled = TRUE; 652 653 /* Create the control device */ 654 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644, 655 "acpi"); 656 sc->acpi_dev_t->si_drv1 = sc; 657 658 if ((error = acpi_machdep_init(dev))) 659 goto out; 660 661 /* Register ACPI again to pass the correct argument of pm_func. */ 662 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 663 664 if (!acpi_disabled("bus")) 665 acpi_probe_children(dev); 666 667 /* Update all GPEs and enable runtime GPEs. */ 668 status = AcpiUpdateAllGpes(); 669 if (ACPI_FAILURE(status)) 670 device_printf(dev, "Could not update all GPEs: %s\n", 671 AcpiFormatException(status)); 672 673 /* Allow sleep request after a while. */ 674 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); 675 676 error = 0; 677 678 out: 679 return_VALUE (error); 680 } 681 682 static void 683 acpi_set_power_children(device_t dev, int state) 684 { 685 device_t child, parent; 686 device_t *devlist; 687 struct pci_devinfo *dinfo; 688 int dstate, i, numdevs; 689 690 if (device_get_children(dev, &devlist, &numdevs) != 0) 691 return; 692 693 /* 694 * Retrieve and set D-state for the sleep state if _SxD is present. 695 * Skip children who aren't attached since they are handled separately. 696 */ 697 parent = device_get_parent(dev); 698 for (i = 0; i < numdevs; i++) { 699 child = devlist[i]; 700 dinfo = device_get_ivars(child); 701 dstate = state; 702 if (device_is_attached(child) && 703 acpi_device_pwr_for_sleep(parent, dev, &dstate) == 0) 704 acpi_set_powerstate(child, dstate); 705 } 706 free(devlist, M_TEMP); 707 } 708 709 static int 710 acpi_suspend(device_t dev) 711 { 712 int error; 713 714 GIANT_REQUIRED; 715 716 error = bus_generic_suspend(dev); 717 if (error == 0) 718 acpi_set_power_children(dev, ACPI_STATE_D3); 719 720 return (error); 721 } 722 723 static int 724 acpi_resume(device_t dev) 725 { 726 727 GIANT_REQUIRED; 728 729 acpi_set_power_children(dev, ACPI_STATE_D0); 730 731 return (bus_generic_resume(dev)); 732 } 733 734 static int 735 acpi_shutdown(device_t dev) 736 { 737 738 GIANT_REQUIRED; 739 740 /* Allow children to shutdown first. */ 741 bus_generic_shutdown(dev); 742 743 /* 744 * Enable any GPEs that are able to power-on the system (i.e., RTC). 745 * Also, disable any that are not valid for this state (most). 746 */ 747 acpi_wake_prep_walk(ACPI_STATE_S5); 748 749 return (0); 750 } 751 752 /* 753 * Handle a new device being added 754 */ 755 static device_t 756 acpi_add_child(device_t bus, u_int order, const char *name, int unit) 757 { 758 struct acpi_device *ad; 759 device_t child; 760 761 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 762 return (NULL); 763 764 resource_list_init(&ad->ad_rl); 765 766 child = device_add_child_ordered(bus, order, name, unit); 767 if (child != NULL) 768 device_set_ivars(child, ad); 769 else 770 free(ad, M_ACPIDEV); 771 return (child); 772 } 773 774 static int 775 acpi_print_child(device_t bus, device_t child) 776 { 777 struct acpi_device *adev = device_get_ivars(child); 778 struct resource_list *rl = &adev->ad_rl; 779 int retval = 0; 780 781 retval += bus_print_child_header(bus, child); 782 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 783 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 784 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 785 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 786 if (device_get_flags(child)) 787 retval += printf(" flags %#x", device_get_flags(child)); 788 retval += bus_print_child_footer(bus, child); 789 790 return (retval); 791 } 792 793 /* 794 * If this device is an ACPI child but no one claimed it, attempt 795 * to power it off. We'll power it back up when a driver is added. 796 * 797 * XXX Disabled for now since many necessary devices (like fdc and 798 * ATA) don't claim the devices we created for them but still expect 799 * them to be powered up. 800 */ 801 static void 802 acpi_probe_nomatch(device_t bus, device_t child) 803 { 804 #ifdef ACPI_ENABLE_POWERDOWN_NODRIVER 805 acpi_set_powerstate(child, ACPI_STATE_D3); 806 #endif 807 } 808 809 /* 810 * If a new driver has a chance to probe a child, first power it up. 811 * 812 * XXX Disabled for now (see acpi_probe_nomatch for details). 813 */ 814 static void 815 acpi_driver_added(device_t dev, driver_t *driver) 816 { 817 device_t child, *devlist; 818 int i, numdevs; 819 820 DEVICE_IDENTIFY(driver, dev); 821 if (device_get_children(dev, &devlist, &numdevs)) 822 return; 823 for (i = 0; i < numdevs; i++) { 824 child = devlist[i]; 825 if (device_get_state(child) == DS_NOTPRESENT) { 826 #ifdef ACPI_ENABLE_POWERDOWN_NODRIVER 827 acpi_set_powerstate(child, ACPI_STATE_D0); 828 if (device_probe_and_attach(child) != 0) 829 acpi_set_powerstate(child, ACPI_STATE_D3); 830 #else 831 device_probe_and_attach(child); 832 #endif 833 } 834 } 835 free(devlist, M_TEMP); 836 } 837 838 /* Location hint for devctl(8) */ 839 static int 840 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf, 841 size_t buflen) 842 { 843 struct acpi_device *dinfo = device_get_ivars(child); 844 845 if (dinfo->ad_handle) 846 snprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle)); 847 else 848 snprintf(buf, buflen, "unknown"); 849 return (0); 850 } 851 852 /* PnP information for devctl(8) */ 853 static int 854 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 855 size_t buflen) 856 { 857 struct acpi_device *dinfo = device_get_ivars(child); 858 ACPI_DEVICE_INFO *adinfo; 859 860 if (ACPI_FAILURE(AcpiGetObjectInfo(dinfo->ad_handle, &adinfo))) { 861 snprintf(buf, buflen, "unknown"); 862 return (0); 863 } 864 865 snprintf(buf, buflen, "_HID=%s _UID=%lu", 866 (adinfo->Valid & ACPI_VALID_HID) ? 867 adinfo->HardwareId.String : "none", 868 (adinfo->Valid & ACPI_VALID_UID) ? 869 strtoul(adinfo->UniqueId.String, NULL, 10) : 0UL); 870 AcpiOsFree(adinfo); 871 872 return (0); 873 } 874 875 /* 876 * Handle per-device ivars 877 */ 878 static int 879 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 880 { 881 struct acpi_device *ad; 882 883 if ((ad = device_get_ivars(child)) == NULL) { 884 device_printf(child, "device has no ivars\n"); 885 return (ENOENT); 886 } 887 888 /* ACPI and ISA compatibility ivars */ 889 switch(index) { 890 case ACPI_IVAR_HANDLE: 891 *(ACPI_HANDLE *)result = ad->ad_handle; 892 break; 893 case ACPI_IVAR_PRIVATE: 894 *(void **)result = ad->ad_private; 895 break; 896 case ACPI_IVAR_FLAGS: 897 *(int *)result = ad->ad_flags; 898 break; 899 case ISA_IVAR_VENDORID: 900 case ISA_IVAR_SERIAL: 901 case ISA_IVAR_COMPATID: 902 *(int *)result = -1; 903 break; 904 case ISA_IVAR_LOGICALID: 905 *(int *)result = acpi_isa_get_logicalid(child); 906 break; 907 default: 908 return (ENOENT); 909 } 910 911 return (0); 912 } 913 914 static int 915 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 916 { 917 struct acpi_device *ad; 918 919 if ((ad = device_get_ivars(child)) == NULL) { 920 device_printf(child, "device has no ivars\n"); 921 return (ENOENT); 922 } 923 924 switch(index) { 925 case ACPI_IVAR_HANDLE: 926 ad->ad_handle = (ACPI_HANDLE)value; 927 break; 928 case ACPI_IVAR_PRIVATE: 929 ad->ad_private = (void *)value; 930 break; 931 case ACPI_IVAR_FLAGS: 932 ad->ad_flags = (int)value; 933 break; 934 default: 935 panic("bad ivar write request (%d)", index); 936 return (ENOENT); 937 } 938 939 return (0); 940 } 941 942 /* 943 * Handle child resource allocation/removal 944 */ 945 static struct resource_list * 946 acpi_get_rlist(device_t dev, device_t child) 947 { 948 struct acpi_device *ad; 949 950 ad = device_get_ivars(child); 951 return (&ad->ad_rl); 952 } 953 954 static int 955 acpi_match_resource_hint(device_t dev, int type, long value) 956 { 957 struct acpi_device *ad = device_get_ivars(dev); 958 struct resource_list *rl = &ad->ad_rl; 959 struct resource_list_entry *rle; 960 961 STAILQ_FOREACH(rle, rl, link) { 962 if (rle->type != type) 963 continue; 964 if (rle->start <= value && rle->end >= value) 965 return (1); 966 } 967 return (0); 968 } 969 970 /* 971 * Wire device unit numbers based on resource matches in hints. 972 */ 973 static void 974 acpi_hint_device_unit(device_t acdev, device_t child, const char *name, 975 int *unitp) 976 { 977 const char *s; 978 long value; 979 int line, matches, unit; 980 981 /* 982 * Iterate over all the hints for the devices with the specified 983 * name to see if one's resources are a subset of this device. 984 */ 985 line = 0; 986 for (;;) { 987 if (resource_find_dev(&line, name, &unit, "at", NULL) != 0) 988 break; 989 990 /* Must have an "at" for acpi or isa. */ 991 resource_string_value(name, unit, "at", &s); 992 if (!(strcmp(s, "acpi0") == 0 || strcmp(s, "acpi") == 0 || 993 strcmp(s, "isa0") == 0 || strcmp(s, "isa") == 0)) 994 continue; 995 996 /* 997 * Check for matching resources. We must have at least one match. 998 * Since I/O and memory resources cannot be shared, if we get a 999 * match on either of those, ignore any mismatches in IRQs or DRQs. 1000 * 1001 * XXX: We may want to revisit this to be more lenient and wire 1002 * as long as it gets one match. 1003 */ 1004 matches = 0; 1005 if (resource_long_value(name, unit, "port", &value) == 0) { 1006 /* 1007 * Floppy drive controllers are notorious for having a 1008 * wide variety of resources not all of which include the 1009 * first port that is specified by the hint (typically 1010 * 0x3f0) (see the comment above fdc_isa_alloc_resources() 1011 * in fdc_isa.c). However, they do all seem to include 1012 * port + 2 (e.g. 0x3f2) so for a floppy device, look for 1013 * 'value + 2' in the port resources instead of the hint 1014 * value. 1015 */ 1016 if (strcmp(name, "fdc") == 0) 1017 value += 2; 1018 if (acpi_match_resource_hint(child, SYS_RES_IOPORT, value)) 1019 matches++; 1020 else 1021 continue; 1022 } 1023 if (resource_long_value(name, unit, "maddr", &value) == 0) { 1024 if (acpi_match_resource_hint(child, SYS_RES_MEMORY, value)) 1025 matches++; 1026 else 1027 continue; 1028 } 1029 if (matches > 0) 1030 goto matched; 1031 if (resource_long_value(name, unit, "irq", &value) == 0) { 1032 if (acpi_match_resource_hint(child, SYS_RES_IRQ, value)) 1033 matches++; 1034 else 1035 continue; 1036 } 1037 if (resource_long_value(name, unit, "drq", &value) == 0) { 1038 if (acpi_match_resource_hint(child, SYS_RES_DRQ, value)) 1039 matches++; 1040 else 1041 continue; 1042 } 1043 1044 matched: 1045 if (matches > 0) { 1046 /* We have a winner! */ 1047 *unitp = unit; 1048 break; 1049 } 1050 } 1051 } 1052 1053 /* 1054 * Pre-allocate/manage all memory and IO resources. Since rman can't handle 1055 * duplicates, we merge any in the sysresource attach routine. 1056 */ 1057 static int 1058 acpi_sysres_alloc(device_t dev) 1059 { 1060 struct resource *res; 1061 struct resource_list *rl; 1062 struct resource_list_entry *rle; 1063 struct rman *rm; 1064 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 1065 device_t *children; 1066 int child_count, i; 1067 1068 /* 1069 * Probe/attach any sysresource devices. This would be unnecessary if we 1070 * had multi-pass probe/attach. 1071 */ 1072 if (device_get_children(dev, &children, &child_count) != 0) 1073 return (ENXIO); 1074 for (i = 0; i < child_count; i++) { 1075 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 1076 device_probe_and_attach(children[i]); 1077 } 1078 free(children, M_TEMP); 1079 1080 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev); 1081 STAILQ_FOREACH(rle, rl, link) { 1082 if (rle->res != NULL) { 1083 device_printf(dev, "duplicate resource for %lx\n", rle->start); 1084 continue; 1085 } 1086 1087 /* Only memory and IO resources are valid here. */ 1088 switch (rle->type) { 1089 case SYS_RES_IOPORT: 1090 rm = &acpi_rman_io; 1091 break; 1092 case SYS_RES_MEMORY: 1093 rm = &acpi_rman_mem; 1094 break; 1095 default: 1096 continue; 1097 } 1098 1099 /* Pre-allocate resource and add to our rman pool. */ 1100 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type, 1101 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 0); 1102 if (res != NULL) { 1103 rman_manage_region(rm, rman_get_start(res), rman_get_end(res)); 1104 rle->res = res; 1105 } else 1106 device_printf(dev, "reservation of %lx, %lx (%d) failed\n", 1107 rle->start, rle->count, rle->type); 1108 } 1109 return (0); 1110 } 1111 1112 static struct resource * 1113 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 1114 u_long start, u_long end, u_long count, u_int flags) 1115 { 1116 ACPI_RESOURCE ares; 1117 struct acpi_device *ad = device_get_ivars(child); 1118 struct resource_list *rl = &ad->ad_rl; 1119 struct resource_list_entry *rle; 1120 struct resource *res; 1121 struct rman *rm; 1122 1123 res = NULL; 1124 1125 /* We only handle memory and IO resources through rman. */ 1126 switch (type) { 1127 case SYS_RES_IOPORT: 1128 rm = &acpi_rman_io; 1129 break; 1130 case SYS_RES_MEMORY: 1131 rm = &acpi_rman_mem; 1132 break; 1133 default: 1134 rm = NULL; 1135 } 1136 1137 ACPI_SERIAL_BEGIN(acpi); 1138 1139 /* 1140 * If this is an allocation of the "default" range for a given RID, and 1141 * we know what the resources for this device are (i.e., they're on the 1142 * child's resource list), use those start/end values. 1143 */ 1144 if (bus == device_get_parent(child) && start == 0UL && end == ~0UL) { 1145 rle = resource_list_find(rl, type, *rid); 1146 if (rle == NULL) 1147 goto out; 1148 start = rle->start; 1149 end = rle->end; 1150 count = rle->count; 1151 } 1152 1153 /* 1154 * If this is an allocation of a specific range, see if we can satisfy 1155 * the request from our system resource regions. If we can't, pass the 1156 * request up to the parent. 1157 */ 1158 if (start + count - 1 == end && rm != NULL) 1159 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE, 1160 child); 1161 if (res == NULL) { 1162 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid, 1163 start, end, count, flags); 1164 } else { 1165 rman_set_rid(res, *rid); 1166 1167 /* If requested, activate the resource using the parent's method. */ 1168 if (flags & RF_ACTIVE) 1169 if (bus_activate_resource(child, type, *rid, res) != 0) { 1170 rman_release_resource(res); 1171 res = NULL; 1172 goto out; 1173 } 1174 } 1175 1176 if (res != NULL && device_get_parent(child) == bus) 1177 switch (type) { 1178 case SYS_RES_IRQ: 1179 /* 1180 * Since bus_config_intr() takes immediate effect, we cannot 1181 * configure the interrupt associated with a device when we 1182 * parse the resources but have to defer it until a driver 1183 * actually allocates the interrupt via bus_alloc_resource(). 1184 * 1185 * XXX: Should we handle the lookup failing? 1186 */ 1187 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares))) 1188 acpi_config_intr(child, &ares); 1189 break; 1190 } 1191 1192 out: 1193 ACPI_SERIAL_END(acpi); 1194 return (res); 1195 } 1196 1197 static int 1198 acpi_release_resource(device_t bus, device_t child, int type, int rid, 1199 struct resource *r) 1200 { 1201 struct rman *rm; 1202 int ret; 1203 1204 /* We only handle memory and IO resources through rman. */ 1205 switch (type) { 1206 case SYS_RES_IOPORT: 1207 rm = &acpi_rman_io; 1208 break; 1209 case SYS_RES_MEMORY: 1210 rm = &acpi_rman_mem; 1211 break; 1212 default: 1213 rm = NULL; 1214 } 1215 1216 ACPI_SERIAL_BEGIN(acpi); 1217 1218 /* 1219 * If this resource belongs to one of our internal managers, 1220 * deactivate it and release it to the local pool. If it doesn't, 1221 * pass this request up to the parent. 1222 */ 1223 if (rm != NULL && rman_is_region_manager(r, rm)) { 1224 if (rman_get_flags(r) & RF_ACTIVE) { 1225 ret = bus_deactivate_resource(child, type, rid, r); 1226 if (ret != 0) 1227 goto out; 1228 } 1229 ret = rman_release_resource(r); 1230 } else 1231 ret = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, type, rid, r); 1232 1233 out: 1234 ACPI_SERIAL_END(acpi); 1235 return (ret); 1236 } 1237 1238 static void 1239 acpi_delete_resource(device_t bus, device_t child, int type, int rid) 1240 { 1241 struct resource_list *rl; 1242 1243 rl = acpi_get_rlist(bus, child); 1244 resource_list_delete(rl, type, rid); 1245 } 1246 1247 /* Allocate an IO port or memory resource, given its GAS. */ 1248 int 1249 acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas, 1250 struct resource **res, u_int flags) 1251 { 1252 int error, res_type; 1253 1254 error = ENOMEM; 1255 if (type == NULL || rid == NULL || gas == NULL || res == NULL) 1256 return (EINVAL); 1257 1258 /* We only support memory and IO spaces. */ 1259 switch (gas->SpaceId) { 1260 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1261 res_type = SYS_RES_MEMORY; 1262 break; 1263 case ACPI_ADR_SPACE_SYSTEM_IO: 1264 res_type = SYS_RES_IOPORT; 1265 break; 1266 default: 1267 return (EOPNOTSUPP); 1268 } 1269 1270 /* 1271 * If the register width is less than 8, assume the BIOS author means 1272 * it is a bit field and just allocate a byte. 1273 */ 1274 if (gas->BitWidth && gas->BitWidth < 8) 1275 gas->BitWidth = 8; 1276 1277 /* Validate the address after we're sure we support the space. */ 1278 if (gas->Address == 0 || gas->BitWidth == 0) 1279 return (EINVAL); 1280 1281 bus_set_resource(dev, res_type, *rid, gas->Address, 1282 gas->BitWidth / 8); 1283 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags); 1284 if (*res != NULL) { 1285 *type = res_type; 1286 error = 0; 1287 } else 1288 bus_delete_resource(dev, res_type, *rid); 1289 1290 return (error); 1291 } 1292 1293 /* Probe _HID and _CID for compatible ISA PNP ids. */ 1294 static uint32_t 1295 acpi_isa_get_logicalid(device_t dev) 1296 { 1297 ACPI_DEVICE_INFO *devinfo; 1298 ACPI_HANDLE h; 1299 uint32_t pnpid; 1300 1301 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1302 1303 /* Fetch and validate the HID. */ 1304 if ((h = acpi_get_handle(dev)) == NULL || 1305 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1306 return_VALUE (0); 1307 1308 pnpid = (devinfo->Valid & ACPI_VALID_HID) != 0 && 1309 devinfo->HardwareId.Length >= ACPI_EISAID_STRING_SIZE ? 1310 PNP_EISAID(devinfo->HardwareId.String) : 0; 1311 AcpiOsFree(devinfo); 1312 1313 return_VALUE (pnpid); 1314 } 1315 1316 static int 1317 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 1318 { 1319 ACPI_DEVICE_INFO *devinfo; 1320 ACPI_DEVICE_ID *ids; 1321 ACPI_HANDLE h; 1322 uint32_t *pnpid; 1323 int i, valid; 1324 1325 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1326 1327 pnpid = cids; 1328 1329 /* Fetch and validate the CID */ 1330 if ((h = acpi_get_handle(dev)) == NULL || 1331 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1332 return_VALUE (0); 1333 1334 if ((devinfo->Valid & ACPI_VALID_CID) == 0) { 1335 AcpiOsFree(devinfo); 1336 return_VALUE (0); 1337 } 1338 1339 if (devinfo->CompatibleIdList.Count < count) 1340 count = devinfo->CompatibleIdList.Count; 1341 ids = devinfo->CompatibleIdList.Ids; 1342 for (i = 0, valid = 0; i < count; i++) 1343 if (ids[i].Length >= ACPI_EISAID_STRING_SIZE && 1344 strncmp(ids[i].String, "PNP", 3) == 0) { 1345 *pnpid++ = PNP_EISAID(ids[i].String); 1346 valid++; 1347 } 1348 AcpiOsFree(devinfo); 1349 1350 return_VALUE (valid); 1351 } 1352 1353 static char * 1354 acpi_device_id_probe(device_t bus, device_t dev, char **ids) 1355 { 1356 ACPI_HANDLE h; 1357 ACPI_OBJECT_TYPE t; 1358 int i; 1359 1360 h = acpi_get_handle(dev); 1361 if (ids == NULL || h == NULL) 1362 return (NULL); 1363 t = acpi_get_type(dev); 1364 if (t != ACPI_TYPE_DEVICE && t != ACPI_TYPE_PROCESSOR) 1365 return (NULL); 1366 1367 /* Try to match one of the array of IDs with a HID or CID. */ 1368 for (i = 0; ids[i] != NULL; i++) { 1369 if (acpi_MatchHid(h, ids[i])) 1370 return (ids[i]); 1371 } 1372 return (NULL); 1373 } 1374 1375 static ACPI_STATUS 1376 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname, 1377 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret) 1378 { 1379 ACPI_HANDLE h; 1380 1381 if (dev == NULL) 1382 h = ACPI_ROOT_OBJECT; 1383 else if ((h = acpi_get_handle(dev)) == NULL) 1384 return (AE_BAD_PARAMETER); 1385 return (AcpiEvaluateObject(h, pathname, parameters, ret)); 1386 } 1387 1388 int 1389 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate) 1390 { 1391 struct acpi_softc *sc; 1392 ACPI_HANDLE handle; 1393 ACPI_STATUS status; 1394 char sxd[8]; 1395 1396 handle = acpi_get_handle(dev); 1397 1398 /* 1399 * XXX If we find these devices, don't try to power them down. 1400 * The serial and IRDA ports on my T23 hang the system when 1401 * set to D3 and it appears that such legacy devices may 1402 * need special handling in their drivers. 1403 */ 1404 if (dstate == NULL || handle == NULL || 1405 acpi_MatchHid(handle, "PNP0500") || 1406 acpi_MatchHid(handle, "PNP0501") || 1407 acpi_MatchHid(handle, "PNP0502") || 1408 acpi_MatchHid(handle, "PNP0510") || 1409 acpi_MatchHid(handle, "PNP0511")) 1410 return (ENXIO); 1411 1412 /* 1413 * Override next state with the value from _SxD, if present. 1414 * Note illegal _S0D is evaluated because some systems expect this. 1415 */ 1416 sc = device_get_softc(bus); 1417 snprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate); 1418 status = acpi_GetInteger(handle, sxd, dstate); 1419 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { 1420 device_printf(dev, "failed to get %s on %s: %s\n", sxd, 1421 acpi_name(handle), AcpiFormatException(status)); 1422 return (ENXIO); 1423 } 1424 1425 return (0); 1426 } 1427 1428 /* Callback arg for our implementation of walking the namespace. */ 1429 struct acpi_device_scan_ctx { 1430 acpi_scan_cb_t user_fn; 1431 void *arg; 1432 ACPI_HANDLE parent; 1433 }; 1434 1435 static ACPI_STATUS 1436 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval) 1437 { 1438 struct acpi_device_scan_ctx *ctx; 1439 device_t dev, old_dev; 1440 ACPI_STATUS status; 1441 ACPI_OBJECT_TYPE type; 1442 1443 /* 1444 * Skip this device if we think we'll have trouble with it or it is 1445 * the parent where the scan began. 1446 */ 1447 ctx = (struct acpi_device_scan_ctx *)arg; 1448 if (acpi_avoid(h) || h == ctx->parent) 1449 return (AE_OK); 1450 1451 /* If this is not a valid device type (e.g., a method), skip it. */ 1452 if (ACPI_FAILURE(AcpiGetType(h, &type))) 1453 return (AE_OK); 1454 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR && 1455 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER) 1456 return (AE_OK); 1457 1458 /* 1459 * Call the user function with the current device. If it is unchanged 1460 * afterwards, return. Otherwise, we update the handle to the new dev. 1461 */ 1462 old_dev = acpi_get_device(h); 1463 dev = old_dev; 1464 status = ctx->user_fn(h, &dev, level, ctx->arg); 1465 if (ACPI_FAILURE(status) || old_dev == dev) 1466 return (status); 1467 1468 /* Remove the old child and its connection to the handle. */ 1469 if (old_dev != NULL) { 1470 device_delete_child(device_get_parent(old_dev), old_dev); 1471 AcpiDetachData(h, acpi_fake_objhandler); 1472 } 1473 1474 /* Recreate the handle association if the user created a device. */ 1475 if (dev != NULL) 1476 AcpiAttachData(h, acpi_fake_objhandler, dev); 1477 1478 return (AE_OK); 1479 } 1480 1481 static ACPI_STATUS 1482 acpi_device_scan_children(device_t bus, device_t dev, int max_depth, 1483 acpi_scan_cb_t user_fn, void *arg) 1484 { 1485 ACPI_HANDLE h; 1486 struct acpi_device_scan_ctx ctx; 1487 1488 if (acpi_disabled("children")) 1489 return (AE_OK); 1490 1491 if (dev == NULL) 1492 h = ACPI_ROOT_OBJECT; 1493 else if ((h = acpi_get_handle(dev)) == NULL) 1494 return (AE_BAD_PARAMETER); 1495 ctx.user_fn = user_fn; 1496 ctx.arg = arg; 1497 ctx.parent = h; 1498 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth, 1499 acpi_device_scan_cb, NULL, &ctx, NULL)); 1500 } 1501 1502 /* 1503 * Even though ACPI devices are not PCI, we use the PCI approach for setting 1504 * device power states since it's close enough to ACPI. 1505 */ 1506 static int 1507 acpi_set_powerstate(device_t child, int state) 1508 { 1509 ACPI_HANDLE h; 1510 ACPI_STATUS status; 1511 1512 h = acpi_get_handle(child); 1513 if (state < ACPI_STATE_D0 || state > ACPI_D_STATES_MAX) 1514 return (EINVAL); 1515 if (h == NULL) 1516 return (0); 1517 1518 /* Ignore errors if the power methods aren't present. */ 1519 status = acpi_pwr_switch_consumer(h, state); 1520 if (ACPI_SUCCESS(status)) { 1521 if (bootverbose) 1522 device_printf(child, "set ACPI power state D%d on %s\n", 1523 state, acpi_name(h)); 1524 } else if (status != AE_NOT_FOUND) 1525 device_printf(child, 1526 "failed to set ACPI power state D%d on %s: %s\n", state, 1527 acpi_name(h), AcpiFormatException(status)); 1528 1529 return (0); 1530 } 1531 1532 static int 1533 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 1534 { 1535 int result, cid_count, i; 1536 uint32_t lid, cids[8]; 1537 1538 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1539 1540 /* 1541 * ISA-style drivers attached to ACPI may persist and 1542 * probe manually if we return ENOENT. We never want 1543 * that to happen, so don't ever return it. 1544 */ 1545 result = ENXIO; 1546 1547 /* Scan the supplied IDs for a match */ 1548 lid = acpi_isa_get_logicalid(child); 1549 cid_count = acpi_isa_get_compatid(child, cids, 8); 1550 while (ids && ids->ip_id) { 1551 if (lid == ids->ip_id) { 1552 result = 0; 1553 goto out; 1554 } 1555 for (i = 0; i < cid_count; i++) { 1556 if (cids[i] == ids->ip_id) { 1557 result = 0; 1558 goto out; 1559 } 1560 } 1561 ids++; 1562 } 1563 1564 out: 1565 if (result == 0 && ids->ip_desc) 1566 device_set_desc(child, ids->ip_desc); 1567 1568 return_VALUE (result); 1569 } 1570 1571 #if defined(__i386__) || defined(__amd64__) 1572 /* 1573 * Look for a MCFG table. If it is present, use the settings for 1574 * domain (segment) 0 to setup PCI config space access via the memory 1575 * map. 1576 */ 1577 static void 1578 acpi_enable_pcie(void) 1579 { 1580 ACPI_TABLE_HEADER *hdr; 1581 ACPI_MCFG_ALLOCATION *alloc, *end; 1582 ACPI_STATUS status; 1583 1584 status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr); 1585 if (ACPI_FAILURE(status)) 1586 return; 1587 1588 end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length); 1589 alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1); 1590 while (alloc < end) { 1591 if (alloc->PciSegment == 0) { 1592 pcie_cfgregopen(alloc->Address, alloc->StartBusNumber, 1593 alloc->EndBusNumber); 1594 return; 1595 } 1596 alloc++; 1597 } 1598 } 1599 #endif 1600 1601 /* 1602 * Scan all of the ACPI namespace and attach child devices. 1603 * 1604 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and 1605 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec. 1606 * However, in violation of the spec, some systems place their PCI link 1607 * devices in \, so we have to walk the whole namespace. We check the 1608 * type of namespace nodes, so this should be ok. 1609 */ 1610 static void 1611 acpi_probe_children(device_t bus) 1612 { 1613 1614 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1615 1616 /* 1617 * Scan the namespace and insert placeholders for all the devices that 1618 * we find. We also probe/attach any early devices. 1619 * 1620 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1621 * we want to create nodes for all devices, not just those that are 1622 * currently present. (This assumes that we don't want to create/remove 1623 * devices as they appear, which might be smarter.) 1624 */ 1625 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1626 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, acpi_probe_child, 1627 NULL, bus, NULL); 1628 1629 /* Pre-allocate resources for our rman from any sysresource devices. */ 1630 acpi_sysres_alloc(bus); 1631 1632 /* Create any static children by calling device identify methods. */ 1633 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1634 bus_generic_probe(bus); 1635 1636 /* Probe/attach all children, created statically and from the namespace. */ 1637 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "acpi bus_generic_attach\n")); 1638 bus_generic_attach(bus); 1639 1640 /* Attach wake sysctls. */ 1641 acpi_wake_sysctl_walk(bus); 1642 1643 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1644 return_VOID; 1645 } 1646 1647 /* 1648 * Determine the probe order for a given device. 1649 */ 1650 static void 1651 acpi_probe_order(ACPI_HANDLE handle, int *order) 1652 { 1653 ACPI_OBJECT_TYPE type; 1654 1655 /* 1656 * 1. CPUs 1657 * 2. I/O port and memory system resource holders 1658 * 3. Embedded controllers (to handle early accesses) 1659 * 4. PCI Link Devices 1660 */ 1661 AcpiGetType(handle, &type); 1662 if (type == ACPI_TYPE_PROCESSOR) 1663 *order = 1; 1664 else if (acpi_MatchHid(handle, "PNP0C01") || acpi_MatchHid(handle, "PNP0C02")) 1665 *order = 2; 1666 else if (acpi_MatchHid(handle, "PNP0C09")) 1667 *order = 3; 1668 else if (acpi_MatchHid(handle, "PNP0C0F")) 1669 *order = 4; 1670 } 1671 1672 /* 1673 * Evaluate a child device and determine whether we might attach a device to 1674 * it. 1675 */ 1676 static ACPI_STATUS 1677 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1678 { 1679 struct acpi_prw_data prw; 1680 ACPI_OBJECT_TYPE type; 1681 ACPI_HANDLE h; 1682 device_t bus, child; 1683 char *handle_str; 1684 int order; 1685 1686 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1687 1688 if (acpi_disabled("children")) 1689 return_ACPI_STATUS (AE_OK); 1690 1691 /* Skip this device if we think we'll have trouble with it. */ 1692 if (acpi_avoid(handle)) 1693 return_ACPI_STATUS (AE_OK); 1694 1695 bus = (device_t)context; 1696 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1697 handle_str = acpi_name(handle); 1698 switch (type) { 1699 case ACPI_TYPE_DEVICE: 1700 /* 1701 * Since we scan from \, be sure to skip system scope objects. 1702 * \_SB_ and \_TZ_ are defined in ACPICA as devices to work around 1703 * BIOS bugs. For example, \_SB_ is to allow \_SB_._INI to be run 1704 * during the intialization and \_TZ_ is to support Notify() on it. 1705 */ 1706 if (strcmp(handle_str, "\\_SB_") == 0 || 1707 strcmp(handle_str, "\\_TZ_") == 0) 1708 break; 1709 if (acpi_parse_prw(handle, &prw) == 0) 1710 AcpiSetupGpeForWake(handle, prw.gpe_handle, prw.gpe_bit); 1711 /* FALLTHROUGH */ 1712 case ACPI_TYPE_PROCESSOR: 1713 case ACPI_TYPE_THERMAL: 1714 case ACPI_TYPE_POWER: 1715 /* 1716 * Create a placeholder device for this node. Sort the 1717 * placeholder so that the probe/attach passes will run 1718 * breadth-first. Orders less than ACPI_DEV_BASE_ORDER 1719 * are reserved for special objects (i.e., system 1720 * resources). 1721 */ 1722 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str)); 1723 order = level * 10 + 100; 1724 acpi_probe_order(handle, &order); 1725 child = BUS_ADD_CHILD(bus, order, NULL, -1); 1726 if (child == NULL) 1727 break; 1728 1729 /* Associate the handle with the device_t and vice versa. */ 1730 acpi_set_handle(child, handle); 1731 AcpiAttachData(handle, acpi_fake_objhandler, child); 1732 1733 /* 1734 * Check that the device is present. If it's not present, 1735 * leave it disabled (so that we have a device_t attached to 1736 * the handle, but we don't probe it). 1737 * 1738 * XXX PCI link devices sometimes report "present" but not 1739 * "functional" (i.e. if disabled). Go ahead and probe them 1740 * anyway since we may enable them later. 1741 */ 1742 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 1743 /* Never disable PCI link devices. */ 1744 if (acpi_MatchHid(handle, "PNP0C0F")) 1745 break; 1746 /* 1747 * Docking stations should remain enabled since the system 1748 * may be undocked at boot. 1749 */ 1750 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h))) 1751 break; 1752 1753 device_disable(child); 1754 break; 1755 } 1756 1757 /* 1758 * Get the device's resource settings and attach them. 1759 * Note that if the device has _PRS but no _CRS, we need 1760 * to decide when it's appropriate to try to configure the 1761 * device. Ignore the return value here; it's OK for the 1762 * device not to have any resources. 1763 */ 1764 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 1765 break; 1766 } 1767 } 1768 1769 return_ACPI_STATUS (AE_OK); 1770 } 1771 1772 /* 1773 * AcpiAttachData() requires an object handler but never uses it. This is a 1774 * placeholder object handler so we can store a device_t in an ACPI_HANDLE. 1775 */ 1776 void 1777 acpi_fake_objhandler(ACPI_HANDLE h, void *data) 1778 { 1779 } 1780 1781 static void 1782 acpi_shutdown_final(void *arg, int howto) 1783 { 1784 struct acpi_softc *sc = (struct acpi_softc *)arg; 1785 ACPI_STATUS status; 1786 1787 /* 1788 * XXX Shutdown code should only run on the BSP (cpuid 0). 1789 * Some chipsets do not power off the system correctly if called from 1790 * an AP. 1791 */ 1792 if ((howto & RB_POWEROFF) != 0) { 1793 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 1794 if (ACPI_FAILURE(status)) { 1795 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 1796 AcpiFormatException(status)); 1797 return; 1798 } 1799 device_printf(sc->acpi_dev, "Powering system off\n"); 1800 ACPI_DISABLE_IRQS(); 1801 status = AcpiEnterSleepState(ACPI_STATE_S5); 1802 if (ACPI_FAILURE(status)) 1803 device_printf(sc->acpi_dev, "power-off failed - %s\n", 1804 AcpiFormatException(status)); 1805 else { 1806 DELAY(1000000); 1807 device_printf(sc->acpi_dev, "power-off failed - timeout\n"); 1808 } 1809 } else if ((howto & RB_HALT) == 0 && sc->acpi_handle_reboot) { 1810 /* Reboot using the reset register. */ 1811 status = AcpiReset(); 1812 if (ACPI_SUCCESS(status)) { 1813 DELAY(1000000); 1814 device_printf(sc->acpi_dev, "reset failed - timeout\n"); 1815 } else if (status != AE_NOT_EXIST) 1816 device_printf(sc->acpi_dev, "reset failed - %s\n", 1817 AcpiFormatException(status)); 1818 } else if (sc->acpi_do_disable && panicstr == NULL) { 1819 /* 1820 * Only disable ACPI if the user requested. On some systems, writing 1821 * the disable value to SMI_CMD hangs the system. 1822 */ 1823 device_printf(sc->acpi_dev, "Shutting down\n"); 1824 AcpiTerminate(); 1825 } 1826 } 1827 1828 static void 1829 acpi_enable_fixed_events(struct acpi_softc *sc) 1830 { 1831 static int first_time = 1; 1832 1833 /* Enable and clear fixed events and install handlers. */ 1834 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) { 1835 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 1836 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 1837 acpi_event_power_button_sleep, sc); 1838 if (first_time) 1839 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 1840 } 1841 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) { 1842 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 1843 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 1844 acpi_event_sleep_button_sleep, sc); 1845 if (first_time) 1846 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 1847 } 1848 1849 first_time = 0; 1850 } 1851 1852 /* 1853 * Returns true if the device is actually present and should 1854 * be attached to. This requires the present, enabled, UI-visible 1855 * and diagnostics-passed bits to be set. 1856 */ 1857 BOOLEAN 1858 acpi_DeviceIsPresent(device_t dev) 1859 { 1860 ACPI_DEVICE_INFO *devinfo; 1861 ACPI_HANDLE h; 1862 BOOLEAN present; 1863 1864 if ((h = acpi_get_handle(dev)) == NULL || 1865 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1866 return (FALSE); 1867 1868 /* If no _STA method, must be present */ 1869 present = (devinfo->Valid & ACPI_VALID_STA) == 0 || 1870 ACPI_DEVICE_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE; 1871 1872 AcpiOsFree(devinfo); 1873 return (present); 1874 } 1875 1876 /* 1877 * Returns true if the battery is actually present and inserted. 1878 */ 1879 BOOLEAN 1880 acpi_BatteryIsPresent(device_t dev) 1881 { 1882 ACPI_DEVICE_INFO *devinfo; 1883 ACPI_HANDLE h; 1884 BOOLEAN present; 1885 1886 if ((h = acpi_get_handle(dev)) == NULL || 1887 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1888 return (FALSE); 1889 1890 /* If no _STA method, must be present */ 1891 present = (devinfo->Valid & ACPI_VALID_STA) == 0 || 1892 ACPI_BATTERY_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE; 1893 1894 AcpiOsFree(devinfo); 1895 return (present); 1896 } 1897 1898 /* 1899 * Match a HID string against a handle 1900 */ 1901 BOOLEAN 1902 acpi_MatchHid(ACPI_HANDLE h, const char *hid) 1903 { 1904 ACPI_DEVICE_INFO *devinfo; 1905 BOOLEAN ret; 1906 int i; 1907 1908 if (hid == NULL || h == NULL || 1909 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1910 return (FALSE); 1911 1912 ret = FALSE; 1913 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 1914 strcmp(hid, devinfo->HardwareId.String) == 0) 1915 ret = TRUE; 1916 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) 1917 for (i = 0; i < devinfo->CompatibleIdList.Count; i++) { 1918 if (strcmp(hid, devinfo->CompatibleIdList.Ids[i].String) == 0) { 1919 ret = TRUE; 1920 break; 1921 } 1922 } 1923 1924 AcpiOsFree(devinfo); 1925 return (ret); 1926 } 1927 1928 /* 1929 * Return the handle of a named object within our scope, ie. that of (parent) 1930 * or one if its parents. 1931 */ 1932 ACPI_STATUS 1933 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 1934 { 1935 ACPI_HANDLE r; 1936 ACPI_STATUS status; 1937 1938 /* Walk back up the tree to the root */ 1939 for (;;) { 1940 status = AcpiGetHandle(parent, path, &r); 1941 if (ACPI_SUCCESS(status)) { 1942 *result = r; 1943 return (AE_OK); 1944 } 1945 /* XXX Return error here? */ 1946 if (status != AE_NOT_FOUND) 1947 return (AE_OK); 1948 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 1949 return (AE_NOT_FOUND); 1950 parent = r; 1951 } 1952 } 1953 1954 /* Find the difference between two PM tick counts. */ 1955 uint32_t 1956 acpi_TimerDelta(uint32_t end, uint32_t start) 1957 { 1958 uint32_t delta; 1959 1960 if (end >= start) 1961 delta = end - start; 1962 else if (AcpiGbl_FADT.Flags & ACPI_FADT_32BIT_TIMER) 1963 delta = ((0xFFFFFFFF - start) + end + 1); 1964 else 1965 delta = ((0x00FFFFFF - start) + end + 1) & 0x00FFFFFF; 1966 return (delta); 1967 } 1968 1969 /* 1970 * Allocate a buffer with a preset data size. 1971 */ 1972 ACPI_BUFFER * 1973 acpi_AllocBuffer(int size) 1974 { 1975 ACPI_BUFFER *buf; 1976 1977 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 1978 return (NULL); 1979 buf->Length = size; 1980 buf->Pointer = (void *)(buf + 1); 1981 return (buf); 1982 } 1983 1984 ACPI_STATUS 1985 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 1986 { 1987 ACPI_OBJECT arg1; 1988 ACPI_OBJECT_LIST args; 1989 1990 arg1.Type = ACPI_TYPE_INTEGER; 1991 arg1.Integer.Value = number; 1992 args.Count = 1; 1993 args.Pointer = &arg1; 1994 1995 return (AcpiEvaluateObject(handle, path, &args, NULL)); 1996 } 1997 1998 /* 1999 * Evaluate a path that should return an integer. 2000 */ 2001 ACPI_STATUS 2002 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 2003 { 2004 ACPI_STATUS status; 2005 ACPI_BUFFER buf; 2006 ACPI_OBJECT param; 2007 2008 if (handle == NULL) 2009 handle = ACPI_ROOT_OBJECT; 2010 2011 /* 2012 * Assume that what we've been pointed at is an Integer object, or 2013 * a method that will return an Integer. 2014 */ 2015 buf.Pointer = ¶m; 2016 buf.Length = sizeof(param); 2017 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2018 if (ACPI_SUCCESS(status)) { 2019 if (param.Type == ACPI_TYPE_INTEGER) 2020 *number = param.Integer.Value; 2021 else 2022 status = AE_TYPE; 2023 } 2024 2025 /* 2026 * In some applications, a method that's expected to return an Integer 2027 * may instead return a Buffer (probably to simplify some internal 2028 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 2029 * convert it into an Integer as best we can. 2030 * 2031 * This is a hack. 2032 */ 2033 if (status == AE_BUFFER_OVERFLOW) { 2034 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 2035 status = AE_NO_MEMORY; 2036 } else { 2037 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2038 if (ACPI_SUCCESS(status)) 2039 status = acpi_ConvertBufferToInteger(&buf, number); 2040 AcpiOsFree(buf.Pointer); 2041 } 2042 } 2043 return (status); 2044 } 2045 2046 ACPI_STATUS 2047 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 2048 { 2049 ACPI_OBJECT *p; 2050 UINT8 *val; 2051 int i; 2052 2053 p = (ACPI_OBJECT *)bufp->Pointer; 2054 if (p->Type == ACPI_TYPE_INTEGER) { 2055 *number = p->Integer.Value; 2056 return (AE_OK); 2057 } 2058 if (p->Type != ACPI_TYPE_BUFFER) 2059 return (AE_TYPE); 2060 if (p->Buffer.Length > sizeof(int)) 2061 return (AE_BAD_DATA); 2062 2063 *number = 0; 2064 val = p->Buffer.Pointer; 2065 for (i = 0; i < p->Buffer.Length; i++) 2066 *number += val[i] << (i * 8); 2067 return (AE_OK); 2068 } 2069 2070 /* 2071 * Iterate over the elements of an a package object, calling the supplied 2072 * function for each element. 2073 * 2074 * XXX possible enhancement might be to abort traversal on error. 2075 */ 2076 ACPI_STATUS 2077 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 2078 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 2079 { 2080 ACPI_OBJECT *comp; 2081 int i; 2082 2083 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 2084 return (AE_BAD_PARAMETER); 2085 2086 /* Iterate over components */ 2087 i = 0; 2088 comp = pkg->Package.Elements; 2089 for (; i < pkg->Package.Count; i++, comp++) 2090 func(comp, arg); 2091 2092 return (AE_OK); 2093 } 2094 2095 /* 2096 * Find the (index)th resource object in a set. 2097 */ 2098 ACPI_STATUS 2099 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 2100 { 2101 ACPI_RESOURCE *rp; 2102 int i; 2103 2104 rp = (ACPI_RESOURCE *)buf->Pointer; 2105 i = index; 2106 while (i-- > 0) { 2107 /* Range check */ 2108 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2109 return (AE_BAD_PARAMETER); 2110 2111 /* Check for terminator */ 2112 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2113 return (AE_NOT_FOUND); 2114 rp = ACPI_NEXT_RESOURCE(rp); 2115 } 2116 if (resp != NULL) 2117 *resp = rp; 2118 2119 return (AE_OK); 2120 } 2121 2122 /* 2123 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 2124 * 2125 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 2126 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 2127 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 2128 * resources. 2129 */ 2130 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 2131 2132 ACPI_STATUS 2133 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 2134 { 2135 ACPI_RESOURCE *rp; 2136 void *newp; 2137 2138 /* Initialise the buffer if necessary. */ 2139 if (buf->Pointer == NULL) { 2140 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 2141 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 2142 return (AE_NO_MEMORY); 2143 rp = (ACPI_RESOURCE *)buf->Pointer; 2144 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2145 rp->Length = 0; 2146 } 2147 if (res == NULL) 2148 return (AE_OK); 2149 2150 /* 2151 * Scan the current buffer looking for the terminator. 2152 * This will either find the terminator or hit the end 2153 * of the buffer and return an error. 2154 */ 2155 rp = (ACPI_RESOURCE *)buf->Pointer; 2156 for (;;) { 2157 /* Range check, don't go outside the buffer */ 2158 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2159 return (AE_BAD_PARAMETER); 2160 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2161 break; 2162 rp = ACPI_NEXT_RESOURCE(rp); 2163 } 2164 2165 /* 2166 * Check the size of the buffer and expand if required. 2167 * 2168 * Required size is: 2169 * size of existing resources before terminator + 2170 * size of new resource and header + 2171 * size of terminator. 2172 * 2173 * Note that this loop should really only run once, unless 2174 * for some reason we are stuffing a *really* huge resource. 2175 */ 2176 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 2177 res->Length + ACPI_RS_SIZE_NO_DATA + 2178 ACPI_RS_SIZE_MIN) >= buf->Length) { 2179 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 2180 return (AE_NO_MEMORY); 2181 bcopy(buf->Pointer, newp, buf->Length); 2182 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 2183 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 2184 AcpiOsFree(buf->Pointer); 2185 buf->Pointer = newp; 2186 buf->Length += buf->Length; 2187 } 2188 2189 /* Insert the new resource. */ 2190 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA); 2191 2192 /* And add the terminator. */ 2193 rp = ACPI_NEXT_RESOURCE(rp); 2194 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2195 rp->Length = 0; 2196 2197 return (AE_OK); 2198 } 2199 2200 /* 2201 * Set interrupt model. 2202 */ 2203 ACPI_STATUS 2204 acpi_SetIntrModel(int model) 2205 { 2206 2207 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 2208 } 2209 2210 /* 2211 * Walk subtables of a table and call a callback routine for each 2212 * subtable. The caller should provide the first subtable and a 2213 * pointer to the end of the table. This can be used to walk tables 2214 * such as MADT and SRAT that use subtable entries. 2215 */ 2216 void 2217 acpi_walk_subtables(void *first, void *end, acpi_subtable_handler *handler, 2218 void *arg) 2219 { 2220 ACPI_SUBTABLE_HEADER *entry; 2221 2222 for (entry = first; (void *)entry < end; ) { 2223 /* Avoid an infinite loop if we hit a bogus entry. */ 2224 if (entry->Length < sizeof(ACPI_SUBTABLE_HEADER)) 2225 return; 2226 2227 handler(entry, arg); 2228 entry = ACPI_ADD_PTR(ACPI_SUBTABLE_HEADER, entry, entry->Length); 2229 } 2230 } 2231 2232 /* 2233 * DEPRECATED. This interface has serious deficiencies and will be 2234 * removed. 2235 * 2236 * Immediately enter the sleep state. In the old model, acpiconf(8) ran 2237 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this. 2238 */ 2239 ACPI_STATUS 2240 acpi_SetSleepState(struct acpi_softc *sc, int state) 2241 { 2242 static int once; 2243 2244 if (!once) { 2245 device_printf(sc->acpi_dev, 2246 "warning: acpi_SetSleepState() deprecated, need to update your software\n"); 2247 once = 1; 2248 } 2249 return (acpi_EnterSleepState(sc, state)); 2250 } 2251 2252 #if defined(__amd64__) || defined(__i386__) 2253 static void 2254 acpi_sleep_force(void *arg) 2255 { 2256 struct acpi_softc *sc = (struct acpi_softc *)arg; 2257 2258 device_printf(sc->acpi_dev, 2259 "suspend request timed out, forcing sleep now\n"); 2260 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2261 device_printf(sc->acpi_dev, "force sleep state S%d failed\n", 2262 sc->acpi_next_sstate); 2263 } 2264 #endif 2265 2266 /* 2267 * Request that the system enter the given suspend state. All /dev/apm 2268 * devices and devd(8) will be notified. Userland then has a chance to 2269 * save state and acknowledge the request. The system sleeps once all 2270 * acks are in. 2271 */ 2272 int 2273 acpi_ReqSleepState(struct acpi_softc *sc, int state) 2274 { 2275 #if defined(__amd64__) || defined(__i386__) 2276 struct apm_clone_data *clone; 2277 ACPI_STATUS status; 2278 2279 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX) 2280 return (EINVAL); 2281 if (!acpi_sleep_states[state]) 2282 return (EOPNOTSUPP); 2283 2284 ACPI_LOCK(acpi); 2285 2286 /* If a suspend request is already in progress, just return. */ 2287 if (sc->acpi_next_sstate != 0) { 2288 ACPI_UNLOCK(acpi); 2289 return (0); 2290 } 2291 2292 /* S5 (soft-off) should be entered directly with no waiting. */ 2293 if (state == ACPI_STATE_S5) { 2294 ACPI_UNLOCK(acpi); 2295 status = acpi_EnterSleepState(sc, state); 2296 return (ACPI_SUCCESS(status) ? 0 : ENXIO); 2297 } 2298 2299 /* Record the pending state and notify all apm devices. */ 2300 sc->acpi_next_sstate = state; 2301 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2302 clone->notify_status = APM_EV_NONE; 2303 if ((clone->flags & ACPI_EVF_DEVD) == 0) { 2304 selwakeuppri(&clone->sel_read, PZERO); 2305 KNOTE_LOCKED(&clone->sel_read.si_note, 0); 2306 } 2307 } 2308 2309 /* If devd(8) is not running, immediately enter the sleep state. */ 2310 if (!devctl_process_running()) { 2311 ACPI_UNLOCK(acpi); 2312 status = acpi_EnterSleepState(sc, state); 2313 return (ACPI_SUCCESS(status) ? 0 : ENXIO); 2314 } 2315 2316 /* 2317 * Set a timeout to fire if userland doesn't ack the suspend request 2318 * in time. This way we still eventually go to sleep if we were 2319 * overheating or running low on battery, even if userland is hung. 2320 * We cancel this timeout once all userland acks are in or the 2321 * suspend request is aborted. 2322 */ 2323 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc); 2324 ACPI_UNLOCK(acpi); 2325 2326 /* Now notify devd(8) also. */ 2327 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state); 2328 2329 return (0); 2330 #else 2331 /* This platform does not support acpi suspend/resume. */ 2332 return (EOPNOTSUPP); 2333 #endif 2334 } 2335 2336 /* 2337 * Acknowledge (or reject) a pending sleep state. The caller has 2338 * prepared for suspend and is now ready for it to proceed. If the 2339 * error argument is non-zero, it indicates suspend should be cancelled 2340 * and gives an errno value describing why. Once all votes are in, 2341 * we suspend the system. 2342 */ 2343 int 2344 acpi_AckSleepState(struct apm_clone_data *clone, int error) 2345 { 2346 #if defined(__amd64__) || defined(__i386__) 2347 struct acpi_softc *sc; 2348 int ret, sleeping; 2349 2350 /* If no pending sleep state, return an error. */ 2351 ACPI_LOCK(acpi); 2352 sc = clone->acpi_sc; 2353 if (sc->acpi_next_sstate == 0) { 2354 ACPI_UNLOCK(acpi); 2355 return (ENXIO); 2356 } 2357 2358 /* Caller wants to abort suspend process. */ 2359 if (error) { 2360 sc->acpi_next_sstate = 0; 2361 callout_stop(&sc->susp_force_to); 2362 device_printf(sc->acpi_dev, 2363 "listener on %s cancelled the pending suspend\n", 2364 devtoname(clone->cdev)); 2365 ACPI_UNLOCK(acpi); 2366 return (0); 2367 } 2368 2369 /* 2370 * Mark this device as acking the suspend request. Then, walk through 2371 * all devices, seeing if they agree yet. We only count devices that 2372 * are writable since read-only devices couldn't ack the request. 2373 */ 2374 sleeping = TRUE; 2375 clone->notify_status = APM_EV_ACKED; 2376 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2377 if ((clone->flags & ACPI_EVF_WRITE) != 0 && 2378 clone->notify_status != APM_EV_ACKED) { 2379 sleeping = FALSE; 2380 break; 2381 } 2382 } 2383 2384 /* If all devices have voted "yes", we will suspend now. */ 2385 if (sleeping) 2386 callout_stop(&sc->susp_force_to); 2387 ACPI_UNLOCK(acpi); 2388 ret = 0; 2389 if (sleeping) { 2390 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2391 ret = ENODEV; 2392 } 2393 return (ret); 2394 #else 2395 /* This platform does not support acpi suspend/resume. */ 2396 return (EOPNOTSUPP); 2397 #endif 2398 } 2399 2400 static void 2401 acpi_sleep_enable(void *arg) 2402 { 2403 struct acpi_softc *sc = (struct acpi_softc *)arg; 2404 2405 /* Reschedule if the system is not fully up and running. */ 2406 if (!AcpiGbl_SystemAwakeAndRunning) { 2407 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); 2408 return; 2409 } 2410 2411 ACPI_LOCK(acpi); 2412 sc->acpi_sleep_disabled = FALSE; 2413 ACPI_UNLOCK(acpi); 2414 } 2415 2416 static ACPI_STATUS 2417 acpi_sleep_disable(struct acpi_softc *sc) 2418 { 2419 ACPI_STATUS status; 2420 2421 /* Fail if the system is not fully up and running. */ 2422 if (!AcpiGbl_SystemAwakeAndRunning) 2423 return (AE_ERROR); 2424 2425 ACPI_LOCK(acpi); 2426 status = sc->acpi_sleep_disabled ? AE_ERROR : AE_OK; 2427 sc->acpi_sleep_disabled = TRUE; 2428 ACPI_UNLOCK(acpi); 2429 2430 return (status); 2431 } 2432 2433 enum acpi_sleep_state { 2434 ACPI_SS_NONE, 2435 ACPI_SS_GPE_SET, 2436 ACPI_SS_DEV_SUSPEND, 2437 ACPI_SS_SLP_PREP, 2438 ACPI_SS_SLEPT, 2439 }; 2440 2441 /* 2442 * Enter the desired system sleep state. 2443 * 2444 * Currently we support S1-S5 but S4 is only S4BIOS 2445 */ 2446 static ACPI_STATUS 2447 acpi_EnterSleepState(struct acpi_softc *sc, int state) 2448 { 2449 ACPI_STATUS status; 2450 enum acpi_sleep_state slp_state; 2451 2452 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2453 2454 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX) 2455 return_ACPI_STATUS (AE_BAD_PARAMETER); 2456 if (!acpi_sleep_states[state]) { 2457 device_printf(sc->acpi_dev, "Sleep state S%d not supported by BIOS\n", 2458 state); 2459 return (AE_SUPPORT); 2460 } 2461 2462 /* Re-entry once we're suspending is not allowed. */ 2463 status = acpi_sleep_disable(sc); 2464 if (ACPI_FAILURE(status)) { 2465 device_printf(sc->acpi_dev, 2466 "suspend request ignored (not ready yet)\n"); 2467 return (status); 2468 } 2469 2470 if (state == ACPI_STATE_S5) { 2471 /* 2472 * Shut down cleanly and power off. This will call us back through the 2473 * shutdown handlers. 2474 */ 2475 shutdown_nice(RB_POWEROFF); 2476 return_ACPI_STATUS (AE_OK); 2477 } 2478 2479 if (smp_started) { 2480 thread_lock(curthread); 2481 sched_bind(curthread, 0); 2482 thread_unlock(curthread); 2483 } 2484 2485 /* 2486 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE 2487 * drivers need this. 2488 */ 2489 mtx_lock(&Giant); 2490 2491 slp_state = ACPI_SS_NONE; 2492 2493 sc->acpi_sstate = state; 2494 2495 /* Enable any GPEs as appropriate and requested by the user. */ 2496 acpi_wake_prep_walk(state); 2497 slp_state = ACPI_SS_GPE_SET; 2498 2499 /* 2500 * Inform all devices that we are going to sleep. If at least one 2501 * device fails, DEVICE_SUSPEND() automatically resumes the tree. 2502 * 2503 * XXX Note that a better two-pass approach with a 'veto' pass 2504 * followed by a "real thing" pass would be better, but the current 2505 * bus interface does not provide for this. 2506 */ 2507 if (DEVICE_SUSPEND(root_bus) != 0) { 2508 device_printf(sc->acpi_dev, "device_suspend failed\n"); 2509 goto backout; 2510 } 2511 slp_state = ACPI_SS_DEV_SUSPEND; 2512 2513 /* If testing device suspend only, back out of everything here. */ 2514 if (acpi_susp_bounce) 2515 goto backout; 2516 2517 status = AcpiEnterSleepStatePrep(state); 2518 if (ACPI_FAILURE(status)) { 2519 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2520 AcpiFormatException(status)); 2521 goto backout; 2522 } 2523 slp_state = ACPI_SS_SLP_PREP; 2524 2525 if (sc->acpi_sleep_delay > 0) 2526 DELAY(sc->acpi_sleep_delay * 1000000); 2527 2528 if (state != ACPI_STATE_S1) { 2529 acpi_sleep_machdep(sc, state); 2530 2531 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 2532 if (state == ACPI_STATE_S4) 2533 AcpiEnable(); 2534 } else { 2535 ACPI_DISABLE_IRQS(); 2536 status = AcpiEnterSleepState(state); 2537 if (ACPI_FAILURE(status)) { 2538 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 2539 AcpiFormatException(status)); 2540 goto backout; 2541 } 2542 } 2543 slp_state = ACPI_SS_SLEPT; 2544 2545 /* 2546 * Back out state according to how far along we got in the suspend 2547 * process. This handles both the error and success cases. 2548 */ 2549 backout: 2550 if (slp_state >= ACPI_SS_GPE_SET) { 2551 acpi_wake_prep_walk(state); 2552 sc->acpi_sstate = ACPI_STATE_S0; 2553 } 2554 if (slp_state >= ACPI_SS_SLP_PREP) 2555 AcpiLeaveSleepState(state); 2556 if (slp_state >= ACPI_SS_DEV_SUSPEND) 2557 DEVICE_RESUME(root_bus); 2558 if (slp_state >= ACPI_SS_SLEPT) 2559 acpi_enable_fixed_events(sc); 2560 sc->acpi_next_sstate = 0; 2561 2562 mtx_unlock(&Giant); 2563 2564 if (smp_started) { 2565 thread_lock(curthread); 2566 sched_unbind(curthread); 2567 thread_unlock(curthread); 2568 } 2569 2570 /* Allow another sleep request after a while. */ 2571 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); 2572 2573 /* Run /etc/rc.resume after we are back. */ 2574 if (devctl_process_running()) 2575 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state); 2576 2577 return_ACPI_STATUS (status); 2578 } 2579 2580 void 2581 acpi_resync_clock(struct acpi_softc *sc) 2582 { 2583 2584 if (!acpi_reset_clock) 2585 return; 2586 2587 /* 2588 * Warm up timecounter again and reset system clock. 2589 */ 2590 (void)timecounter->tc_get_timecount(timecounter); 2591 (void)timecounter->tc_get_timecount(timecounter); 2592 inittodr(time_second + sc->acpi_sleep_delay); 2593 } 2594 2595 /* Enable or disable the device's wake GPE. */ 2596 int 2597 acpi_wake_set_enable(device_t dev, int enable) 2598 { 2599 struct acpi_prw_data prw; 2600 ACPI_STATUS status; 2601 int flags; 2602 2603 /* Make sure the device supports waking the system and get the GPE. */ 2604 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 2605 return (ENXIO); 2606 2607 flags = acpi_get_flags(dev); 2608 if (enable) { 2609 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 2610 ACPI_GPE_ENABLE); 2611 if (ACPI_FAILURE(status)) { 2612 device_printf(dev, "enable wake failed\n"); 2613 return (ENXIO); 2614 } 2615 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); 2616 } else { 2617 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 2618 ACPI_GPE_DISABLE); 2619 if (ACPI_FAILURE(status)) { 2620 device_printf(dev, "disable wake failed\n"); 2621 return (ENXIO); 2622 } 2623 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); 2624 } 2625 2626 return (0); 2627 } 2628 2629 static int 2630 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate) 2631 { 2632 struct acpi_prw_data prw; 2633 device_t dev; 2634 2635 /* Check that this is a wake-capable device and get its GPE. */ 2636 if (acpi_parse_prw(handle, &prw) != 0) 2637 return (ENXIO); 2638 dev = acpi_get_device(handle); 2639 2640 /* 2641 * The destination sleep state must be less than (i.e., higher power) 2642 * or equal to the value specified by _PRW. If this GPE cannot be 2643 * enabled for the next sleep state, then disable it. If it can and 2644 * the user requested it be enabled, turn on any required power resources 2645 * and set _PSW. 2646 */ 2647 if (sstate > prw.lowest_wake) { 2648 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_DISABLE); 2649 if (bootverbose) 2650 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n", 2651 acpi_name(handle), sstate); 2652 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) { 2653 acpi_pwr_wake_enable(handle, 1); 2654 acpi_SetInteger(handle, "_PSW", 1); 2655 if (bootverbose) 2656 device_printf(dev, "wake_prep enabled for %s (S%d)\n", 2657 acpi_name(handle), sstate); 2658 } 2659 2660 return (0); 2661 } 2662 2663 static int 2664 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate) 2665 { 2666 struct acpi_prw_data prw; 2667 device_t dev; 2668 2669 /* 2670 * Check that this is a wake-capable device and get its GPE. Return 2671 * now if the user didn't enable this device for wake. 2672 */ 2673 if (acpi_parse_prw(handle, &prw) != 0) 2674 return (ENXIO); 2675 dev = acpi_get_device(handle); 2676 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0) 2677 return (0); 2678 2679 /* 2680 * If this GPE couldn't be enabled for the previous sleep state, it was 2681 * disabled before going to sleep so re-enable it. If it was enabled, 2682 * clear _PSW and turn off any power resources it used. 2683 */ 2684 if (sstate > prw.lowest_wake) { 2685 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_ENABLE); 2686 if (bootverbose) 2687 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle)); 2688 } else { 2689 acpi_SetInteger(handle, "_PSW", 0); 2690 acpi_pwr_wake_enable(handle, 0); 2691 if (bootverbose) 2692 device_printf(dev, "run_prep cleaned up for %s\n", 2693 acpi_name(handle)); 2694 } 2695 2696 return (0); 2697 } 2698 2699 static ACPI_STATUS 2700 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 2701 { 2702 int sstate; 2703 2704 /* If suspending, run the sleep prep function, otherwise wake. */ 2705 sstate = *(int *)context; 2706 if (AcpiGbl_SystemAwakeAndRunning) 2707 acpi_wake_sleep_prep(handle, sstate); 2708 else 2709 acpi_wake_run_prep(handle, sstate); 2710 return (AE_OK); 2711 } 2712 2713 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */ 2714 static int 2715 acpi_wake_prep_walk(int sstate) 2716 { 2717 ACPI_HANDLE sb_handle; 2718 2719 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) 2720 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100, 2721 acpi_wake_prep, NULL, &sstate, NULL); 2722 return (0); 2723 } 2724 2725 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */ 2726 static int 2727 acpi_wake_sysctl_walk(device_t dev) 2728 { 2729 int error, i, numdevs; 2730 device_t *devlist; 2731 device_t child; 2732 ACPI_STATUS status; 2733 2734 error = device_get_children(dev, &devlist, &numdevs); 2735 if (error != 0 || numdevs == 0) { 2736 if (numdevs == 0) 2737 free(devlist, M_TEMP); 2738 return (error); 2739 } 2740 for (i = 0; i < numdevs; i++) { 2741 child = devlist[i]; 2742 acpi_wake_sysctl_walk(child); 2743 if (!device_is_attached(child)) 2744 continue; 2745 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL); 2746 if (ACPI_SUCCESS(status)) { 2747 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child), 2748 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO, 2749 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0, 2750 acpi_wake_set_sysctl, "I", "Device set to wake the system"); 2751 } 2752 } 2753 free(devlist, M_TEMP); 2754 2755 return (0); 2756 } 2757 2758 /* Enable or disable wake from userland. */ 2759 static int 2760 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS) 2761 { 2762 int enable, error; 2763 device_t dev; 2764 2765 dev = (device_t)arg1; 2766 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0; 2767 2768 error = sysctl_handle_int(oidp, &enable, 0, req); 2769 if (error != 0 || req->newptr == NULL) 2770 return (error); 2771 if (enable != 0 && enable != 1) 2772 return (EINVAL); 2773 2774 return (acpi_wake_set_enable(dev, enable)); 2775 } 2776 2777 /* Parse a device's _PRW into a structure. */ 2778 int 2779 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) 2780 { 2781 ACPI_STATUS status; 2782 ACPI_BUFFER prw_buffer; 2783 ACPI_OBJECT *res, *res2; 2784 int error, i, power_count; 2785 2786 if (h == NULL || prw == NULL) 2787 return (EINVAL); 2788 2789 /* 2790 * The _PRW object (7.2.9) is only required for devices that have the 2791 * ability to wake the system from a sleeping state. 2792 */ 2793 error = EINVAL; 2794 prw_buffer.Pointer = NULL; 2795 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 2796 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 2797 if (ACPI_FAILURE(status)) 2798 return (ENOENT); 2799 res = (ACPI_OBJECT *)prw_buffer.Pointer; 2800 if (res == NULL) 2801 return (ENOENT); 2802 if (!ACPI_PKG_VALID(res, 2)) 2803 goto out; 2804 2805 /* 2806 * Element 1 of the _PRW object: 2807 * The lowest power system sleeping state that can be entered while still 2808 * providing wake functionality. The sleeping state being entered must 2809 * be less than (i.e., higher power) or equal to this value. 2810 */ 2811 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) 2812 goto out; 2813 2814 /* 2815 * Element 0 of the _PRW object: 2816 */ 2817 switch (res->Package.Elements[0].Type) { 2818 case ACPI_TYPE_INTEGER: 2819 /* 2820 * If the data type of this package element is numeric, then this 2821 * _PRW package element is the bit index in the GPEx_EN, in the 2822 * GPE blocks described in the FADT, of the enable bit that is 2823 * enabled for the wake event. 2824 */ 2825 prw->gpe_handle = NULL; 2826 prw->gpe_bit = res->Package.Elements[0].Integer.Value; 2827 error = 0; 2828 break; 2829 case ACPI_TYPE_PACKAGE: 2830 /* 2831 * If the data type of this package element is a package, then this 2832 * _PRW package element is itself a package containing two 2833 * elements. The first is an object reference to the GPE Block 2834 * device that contains the GPE that will be triggered by the wake 2835 * event. The second element is numeric and it contains the bit 2836 * index in the GPEx_EN, in the GPE Block referenced by the 2837 * first element in the package, of the enable bit that is enabled for 2838 * the wake event. 2839 * 2840 * For example, if this field is a package then it is of the form: 2841 * Package() {\_SB.PCI0.ISA.GPE, 2} 2842 */ 2843 res2 = &res->Package.Elements[0]; 2844 if (!ACPI_PKG_VALID(res2, 2)) 2845 goto out; 2846 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 2847 if (prw->gpe_handle == NULL) 2848 goto out; 2849 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) 2850 goto out; 2851 error = 0; 2852 break; 2853 default: 2854 goto out; 2855 } 2856 2857 /* Elements 2 to N of the _PRW object are power resources. */ 2858 power_count = res->Package.Count - 2; 2859 if (power_count > ACPI_PRW_MAX_POWERRES) { 2860 printf("ACPI device %s has too many power resources\n", acpi_name(h)); 2861 power_count = 0; 2862 } 2863 prw->power_res_count = power_count; 2864 for (i = 0; i < power_count; i++) 2865 prw->power_res[i] = res->Package.Elements[i]; 2866 2867 out: 2868 if (prw_buffer.Pointer != NULL) 2869 AcpiOsFree(prw_buffer.Pointer); 2870 return (error); 2871 } 2872 2873 /* 2874 * ACPI Event Handlers 2875 */ 2876 2877 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 2878 2879 static void 2880 acpi_system_eventhandler_sleep(void *arg, int state) 2881 { 2882 struct acpi_softc *sc = (struct acpi_softc *)arg; 2883 int ret; 2884 2885 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2886 2887 /* Check if button action is disabled or unknown. */ 2888 if (state == ACPI_STATE_UNKNOWN) 2889 return; 2890 2891 /* Request that the system prepare to enter the given suspend state. */ 2892 ret = acpi_ReqSleepState(sc, state); 2893 if (ret != 0) 2894 device_printf(sc->acpi_dev, 2895 "request to enter state S%d failed (err %d)\n", state, ret); 2896 2897 return_VOID; 2898 } 2899 2900 static void 2901 acpi_system_eventhandler_wakeup(void *arg, int state) 2902 { 2903 2904 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2905 2906 /* Currently, nothing to do for wakeup. */ 2907 2908 return_VOID; 2909 } 2910 2911 /* 2912 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 2913 */ 2914 UINT32 2915 acpi_event_power_button_sleep(void *context) 2916 { 2917 struct acpi_softc *sc = (struct acpi_softc *)context; 2918 2919 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2920 2921 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 2922 2923 return_VALUE (ACPI_INTERRUPT_HANDLED); 2924 } 2925 2926 UINT32 2927 acpi_event_power_button_wake(void *context) 2928 { 2929 struct acpi_softc *sc = (struct acpi_softc *)context; 2930 2931 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2932 2933 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 2934 2935 return_VALUE (ACPI_INTERRUPT_HANDLED); 2936 } 2937 2938 UINT32 2939 acpi_event_sleep_button_sleep(void *context) 2940 { 2941 struct acpi_softc *sc = (struct acpi_softc *)context; 2942 2943 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2944 2945 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 2946 2947 return_VALUE (ACPI_INTERRUPT_HANDLED); 2948 } 2949 2950 UINT32 2951 acpi_event_sleep_button_wake(void *context) 2952 { 2953 struct acpi_softc *sc = (struct acpi_softc *)context; 2954 2955 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2956 2957 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 2958 2959 return_VALUE (ACPI_INTERRUPT_HANDLED); 2960 } 2961 2962 /* 2963 * XXX This static buffer is suboptimal. There is no locking so only 2964 * use this for single-threaded callers. 2965 */ 2966 char * 2967 acpi_name(ACPI_HANDLE handle) 2968 { 2969 ACPI_BUFFER buf; 2970 static char data[256]; 2971 2972 buf.Length = sizeof(data); 2973 buf.Pointer = data; 2974 2975 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf))) 2976 return (data); 2977 return ("(unknown)"); 2978 } 2979 2980 /* 2981 * Debugging/bug-avoidance. Avoid trying to fetch info on various 2982 * parts of the namespace. 2983 */ 2984 int 2985 acpi_avoid(ACPI_HANDLE handle) 2986 { 2987 char *cp, *env, *np; 2988 int len; 2989 2990 np = acpi_name(handle); 2991 if (*np == '\\') 2992 np++; 2993 if ((env = getenv("debug.acpi.avoid")) == NULL) 2994 return (0); 2995 2996 /* Scan the avoid list checking for a match */ 2997 cp = env; 2998 for (;;) { 2999 while (*cp != 0 && isspace(*cp)) 3000 cp++; 3001 if (*cp == 0) 3002 break; 3003 len = 0; 3004 while (cp[len] != 0 && !isspace(cp[len])) 3005 len++; 3006 if (!strncmp(cp, np, len)) { 3007 freeenv(env); 3008 return(1); 3009 } 3010 cp += len; 3011 } 3012 freeenv(env); 3013 3014 return (0); 3015 } 3016 3017 /* 3018 * Debugging/bug-avoidance. Disable ACPI subsystem components. 3019 */ 3020 int 3021 acpi_disabled(char *subsys) 3022 { 3023 char *cp, *env; 3024 int len; 3025 3026 if ((env = getenv("debug.acpi.disabled")) == NULL) 3027 return (0); 3028 if (strcmp(env, "all") == 0) { 3029 freeenv(env); 3030 return (1); 3031 } 3032 3033 /* Scan the disable list, checking for a match. */ 3034 cp = env; 3035 for (;;) { 3036 while (*cp != '\0' && isspace(*cp)) 3037 cp++; 3038 if (*cp == '\0') 3039 break; 3040 len = 0; 3041 while (cp[len] != '\0' && !isspace(cp[len])) 3042 len++; 3043 if (strncmp(cp, subsys, len) == 0) { 3044 freeenv(env); 3045 return (1); 3046 } 3047 cp += len; 3048 } 3049 freeenv(env); 3050 3051 return (0); 3052 } 3053 3054 /* 3055 * Control interface. 3056 * 3057 * We multiplex ioctls for all participating ACPI devices here. Individual 3058 * drivers wanting to be accessible via /dev/acpi should use the 3059 * register/deregister interface to make their handlers visible. 3060 */ 3061 struct acpi_ioctl_hook 3062 { 3063 TAILQ_ENTRY(acpi_ioctl_hook) link; 3064 u_long cmd; 3065 acpi_ioctl_fn fn; 3066 void *arg; 3067 }; 3068 3069 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 3070 static int acpi_ioctl_hooks_initted; 3071 3072 int 3073 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 3074 { 3075 struct acpi_ioctl_hook *hp; 3076 3077 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 3078 return (ENOMEM); 3079 hp->cmd = cmd; 3080 hp->fn = fn; 3081 hp->arg = arg; 3082 3083 ACPI_LOCK(acpi); 3084 if (acpi_ioctl_hooks_initted == 0) { 3085 TAILQ_INIT(&acpi_ioctl_hooks); 3086 acpi_ioctl_hooks_initted = 1; 3087 } 3088 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 3089 ACPI_UNLOCK(acpi); 3090 3091 return (0); 3092 } 3093 3094 void 3095 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 3096 { 3097 struct acpi_ioctl_hook *hp; 3098 3099 ACPI_LOCK(acpi); 3100 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 3101 if (hp->cmd == cmd && hp->fn == fn) 3102 break; 3103 3104 if (hp != NULL) { 3105 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 3106 free(hp, M_ACPIDEV); 3107 } 3108 ACPI_UNLOCK(acpi); 3109 } 3110 3111 static int 3112 acpiopen(struct cdev *dev, int flag, int fmt, struct thread *td) 3113 { 3114 return (0); 3115 } 3116 3117 static int 3118 acpiclose(struct cdev *dev, int flag, int fmt, struct thread *td) 3119 { 3120 return (0); 3121 } 3122 3123 static int 3124 acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 3125 { 3126 struct acpi_softc *sc; 3127 struct acpi_ioctl_hook *hp; 3128 int error, state; 3129 3130 error = 0; 3131 hp = NULL; 3132 sc = dev->si_drv1; 3133 3134 /* 3135 * Scan the list of registered ioctls, looking for handlers. 3136 */ 3137 ACPI_LOCK(acpi); 3138 if (acpi_ioctl_hooks_initted) 3139 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 3140 if (hp->cmd == cmd) 3141 break; 3142 } 3143 ACPI_UNLOCK(acpi); 3144 if (hp) 3145 return (hp->fn(cmd, addr, hp->arg)); 3146 3147 /* 3148 * Core ioctls are not permitted for non-writable user. 3149 * Currently, other ioctls just fetch information. 3150 * Not changing system behavior. 3151 */ 3152 if ((flag & FWRITE) == 0) 3153 return (EPERM); 3154 3155 /* Core system ioctls. */ 3156 switch (cmd) { 3157 case ACPIIO_REQSLPSTATE: 3158 state = *(int *)addr; 3159 if (state != ACPI_STATE_S5) 3160 return (acpi_ReqSleepState(sc, state)); 3161 device_printf(sc->acpi_dev, "power off via acpi ioctl not supported\n"); 3162 error = EOPNOTSUPP; 3163 break; 3164 case ACPIIO_ACKSLPSTATE: 3165 error = *(int *)addr; 3166 error = acpi_AckSleepState(sc->acpi_clone, error); 3167 break; 3168 case ACPIIO_SETSLPSTATE: /* DEPRECATED */ 3169 state = *(int *)addr; 3170 if (state < ACPI_STATE_S0 || state > ACPI_S_STATES_MAX) 3171 return (EINVAL); 3172 if (!acpi_sleep_states[state]) 3173 return (EOPNOTSUPP); 3174 if (ACPI_FAILURE(acpi_SetSleepState(sc, state))) 3175 error = ENXIO; 3176 break; 3177 default: 3178 error = ENXIO; 3179 break; 3180 } 3181 3182 return (error); 3183 } 3184 3185 static int 3186 acpi_sname2sstate(const char *sname) 3187 { 3188 int sstate; 3189 3190 if (toupper(sname[0]) == 'S') { 3191 sstate = sname[1] - '0'; 3192 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5 && 3193 sname[2] == '\0') 3194 return (sstate); 3195 } else if (strcasecmp(sname, "NONE") == 0) 3196 return (ACPI_STATE_UNKNOWN); 3197 return (-1); 3198 } 3199 3200 static const char * 3201 acpi_sstate2sname(int sstate) 3202 { 3203 static const char *snames[] = { "S0", "S1", "S2", "S3", "S4", "S5" }; 3204 3205 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5) 3206 return (snames[sstate]); 3207 else if (sstate == ACPI_STATE_UNKNOWN) 3208 return ("NONE"); 3209 return (NULL); 3210 } 3211 3212 static int 3213 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3214 { 3215 int error; 3216 struct sbuf sb; 3217 UINT8 state; 3218 3219 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND); 3220 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++) 3221 if (acpi_sleep_states[state]) 3222 sbuf_printf(&sb, "%s ", acpi_sstate2sname(state)); 3223 sbuf_trim(&sb); 3224 sbuf_finish(&sb); 3225 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 3226 sbuf_delete(&sb); 3227 return (error); 3228 } 3229 3230 static int 3231 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3232 { 3233 char sleep_state[10]; 3234 int error, new_state, old_state; 3235 3236 old_state = *(int *)oidp->oid_arg1; 3237 strlcpy(sleep_state, acpi_sstate2sname(old_state), sizeof(sleep_state)); 3238 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 3239 if (error == 0 && req->newptr != NULL) { 3240 new_state = acpi_sname2sstate(sleep_state); 3241 if (new_state < ACPI_STATE_S1) 3242 return (EINVAL); 3243 if (new_state < ACPI_S_STATE_COUNT && !acpi_sleep_states[new_state]) 3244 return (EOPNOTSUPP); 3245 if (new_state != old_state) 3246 *(int *)oidp->oid_arg1 = new_state; 3247 } 3248 return (error); 3249 } 3250 3251 /* Inform devctl(4) when we receive a Notify. */ 3252 void 3253 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 3254 { 3255 char notify_buf[16]; 3256 ACPI_BUFFER handle_buf; 3257 ACPI_STATUS status; 3258 3259 if (subsystem == NULL) 3260 return; 3261 3262 handle_buf.Pointer = NULL; 3263 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 3264 status = AcpiNsHandleToPathname(h, &handle_buf); 3265 if (ACPI_FAILURE(status)) 3266 return; 3267 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 3268 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 3269 AcpiOsFree(handle_buf.Pointer); 3270 } 3271 3272 #ifdef ACPI_DEBUG 3273 /* 3274 * Support for parsing debug options from the kernel environment. 3275 * 3276 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 3277 * by specifying the names of the bits in the debug.acpi.layer and 3278 * debug.acpi.level environment variables. Bits may be unset by 3279 * prefixing the bit name with !. 3280 */ 3281 struct debugtag 3282 { 3283 char *name; 3284 UINT32 value; 3285 }; 3286 3287 static struct debugtag dbg_layer[] = { 3288 {"ACPI_UTILITIES", ACPI_UTILITIES}, 3289 {"ACPI_HARDWARE", ACPI_HARDWARE}, 3290 {"ACPI_EVENTS", ACPI_EVENTS}, 3291 {"ACPI_TABLES", ACPI_TABLES}, 3292 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 3293 {"ACPI_PARSER", ACPI_PARSER}, 3294 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 3295 {"ACPI_EXECUTER", ACPI_EXECUTER}, 3296 {"ACPI_RESOURCES", ACPI_RESOURCES}, 3297 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 3298 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 3299 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 3300 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 3301 3302 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 3303 {"ACPI_BATTERY", ACPI_BATTERY}, 3304 {"ACPI_BUS", ACPI_BUS}, 3305 {"ACPI_BUTTON", ACPI_BUTTON}, 3306 {"ACPI_EC", ACPI_EC}, 3307 {"ACPI_FAN", ACPI_FAN}, 3308 {"ACPI_POWERRES", ACPI_POWERRES}, 3309 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 3310 {"ACPI_THERMAL", ACPI_THERMAL}, 3311 {"ACPI_TIMER", ACPI_TIMER}, 3312 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 3313 {NULL, 0} 3314 }; 3315 3316 static struct debugtag dbg_level[] = { 3317 {"ACPI_LV_INIT", ACPI_LV_INIT}, 3318 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 3319 {"ACPI_LV_INFO", ACPI_LV_INFO}, 3320 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 3321 3322 /* Trace verbosity level 1 [Standard Trace Level] */ 3323 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 3324 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 3325 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 3326 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 3327 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 3328 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 3329 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 3330 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 3331 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 3332 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 3333 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 3334 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 3335 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 3336 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 3337 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 3338 3339 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 3340 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 3341 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 3342 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 3343 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 3344 {"ACPI_LV_ALL", ACPI_LV_ALL}, 3345 3346 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 3347 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 3348 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 3349 {"ACPI_LV_IO", ACPI_LV_IO}, 3350 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 3351 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 3352 3353 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 3354 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 3355 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 3356 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 3357 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 3358 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 3359 {NULL, 0} 3360 }; 3361 3362 static void 3363 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 3364 { 3365 char *ep; 3366 int i, l; 3367 int set; 3368 3369 while (*cp) { 3370 if (isspace(*cp)) { 3371 cp++; 3372 continue; 3373 } 3374 ep = cp; 3375 while (*ep && !isspace(*ep)) 3376 ep++; 3377 if (*cp == '!') { 3378 set = 0; 3379 cp++; 3380 if (cp == ep) 3381 continue; 3382 } else { 3383 set = 1; 3384 } 3385 l = ep - cp; 3386 for (i = 0; tag[i].name != NULL; i++) { 3387 if (!strncmp(cp, tag[i].name, l)) { 3388 if (set) 3389 *flag |= tag[i].value; 3390 else 3391 *flag &= ~tag[i].value; 3392 } 3393 } 3394 cp = ep; 3395 } 3396 } 3397 3398 static void 3399 acpi_set_debugging(void *junk) 3400 { 3401 char *layer, *level; 3402 3403 if (cold) { 3404 AcpiDbgLayer = 0; 3405 AcpiDbgLevel = 0; 3406 } 3407 3408 layer = getenv("debug.acpi.layer"); 3409 level = getenv("debug.acpi.level"); 3410 if (layer == NULL && level == NULL) 3411 return; 3412 3413 printf("ACPI set debug"); 3414 if (layer != NULL) { 3415 if (strcmp("NONE", layer) != 0) 3416 printf(" layer '%s'", layer); 3417 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer); 3418 freeenv(layer); 3419 } 3420 if (level != NULL) { 3421 if (strcmp("NONE", level) != 0) 3422 printf(" level '%s'", level); 3423 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel); 3424 freeenv(level); 3425 } 3426 printf("\n"); 3427 } 3428 3429 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 3430 NULL); 3431 3432 static int 3433 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 3434 { 3435 int error, *dbg; 3436 struct debugtag *tag; 3437 struct sbuf sb; 3438 3439 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 3440 return (ENOMEM); 3441 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 3442 tag = &dbg_layer[0]; 3443 dbg = &AcpiDbgLayer; 3444 } else { 3445 tag = &dbg_level[0]; 3446 dbg = &AcpiDbgLevel; 3447 } 3448 3449 /* Get old values if this is a get request. */ 3450 ACPI_SERIAL_BEGIN(acpi); 3451 if (*dbg == 0) { 3452 sbuf_cpy(&sb, "NONE"); 3453 } else if (req->newptr == NULL) { 3454 for (; tag->name != NULL; tag++) { 3455 if ((*dbg & tag->value) == tag->value) 3456 sbuf_printf(&sb, "%s ", tag->name); 3457 } 3458 } 3459 sbuf_trim(&sb); 3460 sbuf_finish(&sb); 3461 3462 /* Copy out the old values to the user. */ 3463 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb)); 3464 sbuf_delete(&sb); 3465 3466 /* If the user is setting a string, parse it. */ 3467 if (error == 0 && req->newptr != NULL) { 3468 *dbg = 0; 3469 setenv((char *)oidp->oid_arg1, (char *)req->newptr); 3470 acpi_set_debugging(NULL); 3471 } 3472 ACPI_SERIAL_END(acpi); 3473 3474 return (error); 3475 } 3476 3477 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 3478 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 3479 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 3480 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 3481 #endif /* ACPI_DEBUG */ 3482 3483 static int 3484 acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS) 3485 { 3486 int error; 3487 int old; 3488 3489 old = acpi_debug_objects; 3490 error = sysctl_handle_int(oidp, &acpi_debug_objects, 0, req); 3491 if (error != 0 || req->newptr == NULL) 3492 return (error); 3493 if (old == acpi_debug_objects || (old && acpi_debug_objects)) 3494 return (0); 3495 3496 ACPI_SERIAL_BEGIN(acpi); 3497 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE; 3498 ACPI_SERIAL_END(acpi); 3499 3500 return (0); 3501 } 3502 3503 static int 3504 acpi_parse_interfaces(char *str, struct acpi_interface *iface) 3505 { 3506 char *p; 3507 size_t len; 3508 int i, j; 3509 3510 p = str; 3511 while (isspace(*p) || *p == ',') 3512 p++; 3513 len = strlen(p); 3514 if (len == 0) 3515 return (0); 3516 p = strdup(p, M_TEMP); 3517 for (i = 0; i < len; i++) 3518 if (p[i] == ',') 3519 p[i] = '\0'; 3520 i = j = 0; 3521 while (i < len) 3522 if (isspace(p[i]) || p[i] == '\0') 3523 i++; 3524 else { 3525 i += strlen(p + i) + 1; 3526 j++; 3527 } 3528 if (j == 0) { 3529 free(p, M_TEMP); 3530 return (0); 3531 } 3532 iface->data = malloc(sizeof(*iface->data) * j, M_TEMP, M_WAITOK); 3533 iface->num = j; 3534 i = j = 0; 3535 while (i < len) 3536 if (isspace(p[i]) || p[i] == '\0') 3537 i++; 3538 else { 3539 iface->data[j] = p + i; 3540 i += strlen(p + i) + 1; 3541 j++; 3542 } 3543 3544 return (j); 3545 } 3546 3547 static void 3548 acpi_free_interfaces(struct acpi_interface *iface) 3549 { 3550 3551 free(iface->data[0], M_TEMP); 3552 free(iface->data, M_TEMP); 3553 } 3554 3555 static void 3556 acpi_reset_interfaces(device_t dev) 3557 { 3558 struct acpi_interface list; 3559 ACPI_STATUS status; 3560 int i; 3561 3562 if (acpi_parse_interfaces(acpi_install_interface, &list) > 0) { 3563 for (i = 0; i < list.num; i++) { 3564 status = AcpiInstallInterface(list.data[i]); 3565 if (ACPI_FAILURE(status)) 3566 device_printf(dev, 3567 "failed to install _OSI(\"%s\"): %s\n", 3568 list.data[i], AcpiFormatException(status)); 3569 else if (bootverbose) 3570 device_printf(dev, "installed _OSI(\"%s\")\n", 3571 list.data[i]); 3572 } 3573 acpi_free_interfaces(&list); 3574 } 3575 if (acpi_parse_interfaces(acpi_remove_interface, &list) > 0) { 3576 for (i = 0; i < list.num; i++) { 3577 status = AcpiRemoveInterface(list.data[i]); 3578 if (ACPI_FAILURE(status)) 3579 device_printf(dev, 3580 "failed to remove _OSI(\"%s\"): %s\n", 3581 list.data[i], AcpiFormatException(status)); 3582 else if (bootverbose) 3583 device_printf(dev, "removed _OSI(\"%s\")\n", 3584 list.data[i]); 3585 } 3586 acpi_free_interfaces(&list); 3587 } 3588 } 3589 3590 static int 3591 acpi_pm_func(u_long cmd, void *arg, ...) 3592 { 3593 int state, acpi_state; 3594 int error; 3595 struct acpi_softc *sc; 3596 va_list ap; 3597 3598 error = 0; 3599 switch (cmd) { 3600 case POWER_CMD_SUSPEND: 3601 sc = (struct acpi_softc *)arg; 3602 if (sc == NULL) { 3603 error = EINVAL; 3604 goto out; 3605 } 3606 3607 va_start(ap, arg); 3608 state = va_arg(ap, int); 3609 va_end(ap); 3610 3611 switch (state) { 3612 case POWER_SLEEP_STATE_STANDBY: 3613 acpi_state = sc->acpi_standby_sx; 3614 break; 3615 case POWER_SLEEP_STATE_SUSPEND: 3616 acpi_state = sc->acpi_suspend_sx; 3617 break; 3618 case POWER_SLEEP_STATE_HIBERNATE: 3619 acpi_state = ACPI_STATE_S4; 3620 break; 3621 default: 3622 error = EINVAL; 3623 goto out; 3624 } 3625 3626 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state))) 3627 error = ENXIO; 3628 break; 3629 default: 3630 error = EINVAL; 3631 goto out; 3632 } 3633 3634 out: 3635 return (error); 3636 } 3637 3638 static void 3639 acpi_pm_register(void *arg) 3640 { 3641 if (!cold || resource_disabled("acpi", 0)) 3642 return; 3643 3644 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 3645 } 3646 3647 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 3648