1 /*- 2 * Copyright (c) 2000 Takanori Watanabe <takawata@jp.freebsd.org> 3 * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.freebsd.org> 4 * Copyright (c) 2000, 2001 Michael Smith 5 * Copyright (c) 2000 BSDi 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include "opt_acpi.h" 34 #include <sys/param.h> 35 #include <sys/kernel.h> 36 #include <sys/proc.h> 37 #include <sys/fcntl.h> 38 #include <sys/malloc.h> 39 #include <sys/module.h> 40 #include <sys/bus.h> 41 #include <sys/conf.h> 42 #include <sys/ioccom.h> 43 #include <sys/reboot.h> 44 #include <sys/sysctl.h> 45 #include <sys/ctype.h> 46 #include <sys/linker.h> 47 #include <sys/power.h> 48 #include <sys/sbuf.h> 49 #include <sys/sched.h> 50 #include <sys/smp.h> 51 #include <sys/timetc.h> 52 53 #if defined(__i386__) || defined(__amd64__) 54 #include <machine/pci_cfgreg.h> 55 #endif 56 #include <machine/resource.h> 57 #include <machine/bus.h> 58 #include <sys/rman.h> 59 #include <isa/isavar.h> 60 #include <isa/pnpvar.h> 61 62 #include <contrib/dev/acpica/include/acpi.h> 63 #include <contrib/dev/acpica/include/accommon.h> 64 #include <contrib/dev/acpica/include/acnamesp.h> 65 66 #include <dev/acpica/acpivar.h> 67 #include <dev/acpica/acpiio.h> 68 69 #include <vm/vm_param.h> 70 71 static MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 72 73 /* Hooks for the ACPI CA debugging infrastructure */ 74 #define _COMPONENT ACPI_BUS 75 ACPI_MODULE_NAME("ACPI") 76 77 static d_open_t acpiopen; 78 static d_close_t acpiclose; 79 static d_ioctl_t acpiioctl; 80 81 static struct cdevsw acpi_cdevsw = { 82 .d_version = D_VERSION, 83 .d_open = acpiopen, 84 .d_close = acpiclose, 85 .d_ioctl = acpiioctl, 86 .d_name = "acpi", 87 }; 88 89 struct acpi_interface { 90 ACPI_STRING *data; 91 int num; 92 }; 93 94 /* Global mutex for locking access to the ACPI subsystem. */ 95 struct mtx acpi_mutex; 96 97 /* Bitmap of device quirks. */ 98 int acpi_quirks; 99 100 /* 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 void acpi_reserve_resources(device_t dev); 120 static int acpi_sysres_alloc(device_t dev); 121 static int acpi_set_resource(device_t dev, device_t child, int type, 122 int rid, u_long start, u_long count); 123 static struct resource *acpi_alloc_resource(device_t bus, device_t child, 124 int type, int *rid, u_long start, u_long end, 125 u_long count, u_int flags); 126 static int acpi_adjust_resource(device_t bus, device_t child, int type, 127 struct resource *r, u_long start, u_long end); 128 static int acpi_release_resource(device_t bus, device_t child, int type, 129 int rid, struct resource *r); 130 static void acpi_delete_resource(device_t bus, device_t child, int type, 131 int rid); 132 static uint32_t acpi_isa_get_logicalid(device_t dev); 133 static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count); 134 static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids); 135 static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev, 136 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters, 137 ACPI_BUFFER *ret); 138 static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, 139 void *context, void **retval); 140 static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev, 141 int max_depth, acpi_scan_cb_t user_fn, void *arg); 142 static int acpi_set_powerstate(device_t child, int state); 143 static int acpi_isa_pnp_probe(device_t bus, device_t child, 144 struct isa_pnp_id *ids); 145 static void acpi_probe_children(device_t bus); 146 static void acpi_probe_order(ACPI_HANDLE handle, int *order); 147 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, 148 void *context, void **status); 149 static void acpi_sleep_enable(void *arg); 150 static ACPI_STATUS acpi_sleep_disable(struct acpi_softc *sc); 151 static ACPI_STATUS acpi_EnterSleepState(struct acpi_softc *sc, int state); 152 static void acpi_shutdown_final(void *arg, int howto); 153 static void acpi_enable_fixed_events(struct acpi_softc *sc); 154 static BOOLEAN acpi_has_hid(ACPI_HANDLE handle); 155 static void acpi_resync_clock(struct acpi_softc *sc); 156 static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate); 157 static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate); 158 static int acpi_wake_prep_walk(int sstate); 159 static int acpi_wake_sysctl_walk(device_t dev); 160 static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS); 161 static void acpi_system_eventhandler_sleep(void *arg, int state); 162 static void acpi_system_eventhandler_wakeup(void *arg, int state); 163 static int acpi_sname2sstate(const char *sname); 164 static const char *acpi_sstate2sname(int sstate); 165 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 166 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 167 static int acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS); 168 static int acpi_pm_func(u_long cmd, void *arg, ...); 169 static int acpi_child_location_str_method(device_t acdev, device_t child, 170 char *buf, size_t buflen); 171 static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child, 172 char *buf, size_t buflen); 173 #if defined(__i386__) || defined(__amd64__) 174 static void acpi_enable_pcie(void); 175 #endif 176 static void acpi_hint_device_unit(device_t acdev, device_t child, 177 const char *name, int *unitp); 178 static void acpi_reset_interfaces(device_t dev); 179 180 static device_method_t acpi_methods[] = { 181 /* Device interface */ 182 DEVMETHOD(device_probe, acpi_probe), 183 DEVMETHOD(device_attach, acpi_attach), 184 DEVMETHOD(device_shutdown, acpi_shutdown), 185 DEVMETHOD(device_detach, bus_generic_detach), 186 DEVMETHOD(device_suspend, acpi_suspend), 187 DEVMETHOD(device_resume, acpi_resume), 188 189 /* Bus interface */ 190 DEVMETHOD(bus_add_child, acpi_add_child), 191 DEVMETHOD(bus_print_child, acpi_print_child), 192 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch), 193 DEVMETHOD(bus_driver_added, acpi_driver_added), 194 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 195 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 196 DEVMETHOD(bus_get_resource_list, acpi_get_rlist), 197 DEVMETHOD(bus_set_resource, acpi_set_resource), 198 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 199 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 200 DEVMETHOD(bus_adjust_resource, acpi_adjust_resource), 201 DEVMETHOD(bus_release_resource, acpi_release_resource), 202 DEVMETHOD(bus_delete_resource, acpi_delete_resource), 203 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method), 204 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method), 205 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 206 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 207 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 208 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 209 DEVMETHOD(bus_hint_device_unit, acpi_hint_device_unit), 210 211 /* ACPI bus */ 212 DEVMETHOD(acpi_id_probe, acpi_device_id_probe), 213 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj), 214 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep), 215 DEVMETHOD(acpi_scan_children, acpi_device_scan_children), 216 217 /* ISA emulation */ 218 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 219 220 DEVMETHOD_END 221 }; 222 223 static driver_t acpi_driver = { 224 "acpi", 225 acpi_methods, 226 sizeof(struct acpi_softc), 227 }; 228 229 static devclass_t acpi_devclass; 230 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0); 231 MODULE_VERSION(acpi, 1); 232 233 ACPI_SERIAL_DECL(acpi, "ACPI root bus"); 234 235 /* Local pools for managing system resources for ACPI child devices. */ 236 static struct rman acpi_rman_io, acpi_rman_mem; 237 238 #define ACPI_MINIMUM_AWAKETIME 5 239 240 /* Holds the description of the acpi0 device. */ 241 static char acpi_desc[ACPI_OEM_ID_SIZE + ACPI_OEM_TABLE_ID_SIZE + 2]; 242 243 SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging"); 244 static char acpi_ca_version[12]; 245 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, 246 acpi_ca_version, 0, "Version of Intel ACPI-CA"); 247 248 /* 249 * Allow overriding _OSI methods. 250 */ 251 static char acpi_install_interface[256]; 252 TUNABLE_STR("hw.acpi.install_interface", acpi_install_interface, 253 sizeof(acpi_install_interface)); 254 static char acpi_remove_interface[256]; 255 TUNABLE_STR("hw.acpi.remove_interface", acpi_remove_interface, 256 sizeof(acpi_remove_interface)); 257 258 /* 259 * Allow override of whether methods execute in parallel or not. 260 * Enable this for serial behavior, which fixes "AE_ALREADY_EXISTS" 261 * errors for AML that really can't handle parallel method execution. 262 * It is off by default since this breaks recursive methods and 263 * some IBMs use such code. 264 */ 265 static int acpi_serialize_methods; 266 TUNABLE_INT("hw.acpi.serialize_methods", &acpi_serialize_methods); 267 268 /* Allow users to dump Debug objects without ACPI debugger. */ 269 static int acpi_debug_objects; 270 TUNABLE_INT("debug.acpi.enable_debug_objects", &acpi_debug_objects); 271 SYSCTL_PROC(_debug_acpi, OID_AUTO, enable_debug_objects, 272 CTLFLAG_RW | CTLTYPE_INT, NULL, 0, acpi_debug_objects_sysctl, "I", 273 "Enable Debug objects"); 274 275 /* Allow the interpreter to ignore common mistakes in BIOS. */ 276 static int acpi_interpreter_slack = 1; 277 TUNABLE_INT("debug.acpi.interpreter_slack", &acpi_interpreter_slack); 278 SYSCTL_INT(_debug_acpi, OID_AUTO, interpreter_slack, CTLFLAG_RDTUN, 279 &acpi_interpreter_slack, 1, "Turn on interpreter slack mode."); 280 281 #ifdef __amd64__ 282 /* Reset system clock while resuming. XXX Remove once tested. */ 283 static int acpi_reset_clock = 1; 284 TUNABLE_INT("debug.acpi.reset_clock", &acpi_reset_clock); 285 SYSCTL_INT(_debug_acpi, OID_AUTO, reset_clock, CTLFLAG_RW, 286 &acpi_reset_clock, 1, "Reset system clock while resuming."); 287 #endif 288 289 /* Allow users to override quirks. */ 290 TUNABLE_INT("debug.acpi.quirks", &acpi_quirks); 291 292 static int acpi_susp_bounce; 293 SYSCTL_INT(_debug_acpi, OID_AUTO, suspend_bounce, CTLFLAG_RW, 294 &acpi_susp_bounce, 0, "Don't actually suspend, just test devices."); 295 296 /* 297 * ACPI can only be loaded as a module by the loader; activating it after 298 * system bootstrap time is not useful, and can be fatal to the system. 299 * It also cannot be unloaded, since the entire system bus hierarchy hangs 300 * off it. 301 */ 302 static int 303 acpi_modevent(struct module *mod, int event, void *junk) 304 { 305 switch (event) { 306 case MOD_LOAD: 307 if (!cold) { 308 printf("The ACPI driver cannot be loaded after boot.\n"); 309 return (EPERM); 310 } 311 break; 312 case MOD_UNLOAD: 313 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 314 return (EBUSY); 315 break; 316 default: 317 break; 318 } 319 return (0); 320 } 321 322 /* 323 * Perform early initialization. 324 */ 325 ACPI_STATUS 326 acpi_Startup(void) 327 { 328 static int started = 0; 329 ACPI_STATUS status; 330 int val; 331 332 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 333 334 /* Only run the startup code once. The MADT driver also calls this. */ 335 if (started) 336 return_VALUE (AE_OK); 337 started = 1; 338 339 /* 340 * Pre-allocate space for RSDT/XSDT and DSDT tables and allow resizing 341 * if more tables exist. 342 */ 343 if (ACPI_FAILURE(status = AcpiInitializeTables(NULL, 2, TRUE))) { 344 printf("ACPI: Table initialisation failed: %s\n", 345 AcpiFormatException(status)); 346 return_VALUE (status); 347 } 348 349 /* Set up any quirks we have for this system. */ 350 if (acpi_quirks == ACPI_Q_OK) 351 acpi_table_quirks(&acpi_quirks); 352 353 /* If the user manually set the disabled hint to 0, force-enable ACPI. */ 354 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0) 355 acpi_quirks &= ~ACPI_Q_BROKEN; 356 if (acpi_quirks & ACPI_Q_BROKEN) { 357 printf("ACPI disabled by blacklist. Contact your BIOS vendor.\n"); 358 status = AE_SUPPORT; 359 } 360 361 return_VALUE (status); 362 } 363 364 /* 365 * Detect ACPI and perform early initialisation. 366 */ 367 int 368 acpi_identify(void) 369 { 370 ACPI_TABLE_RSDP *rsdp; 371 ACPI_TABLE_HEADER *rsdt; 372 ACPI_PHYSICAL_ADDRESS paddr; 373 struct sbuf sb; 374 375 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 376 377 if (!cold) 378 return (ENXIO); 379 380 /* Check that we haven't been disabled with a hint. */ 381 if (resource_disabled("acpi", 0)) 382 return (ENXIO); 383 384 /* Check for other PM systems. */ 385 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 386 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 387 printf("ACPI identify failed, other PM system enabled.\n"); 388 return (ENXIO); 389 } 390 391 /* Initialize root tables. */ 392 if (ACPI_FAILURE(acpi_Startup())) { 393 printf("ACPI: Try disabling either ACPI or apic support.\n"); 394 return (ENXIO); 395 } 396 397 if ((paddr = AcpiOsGetRootPointer()) == 0 || 398 (rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP))) == NULL) 399 return (ENXIO); 400 if (rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress != 0) 401 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress; 402 else 403 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress; 404 AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP)); 405 406 if ((rsdt = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER))) == NULL) 407 return (ENXIO); 408 sbuf_new(&sb, acpi_desc, sizeof(acpi_desc), SBUF_FIXEDLEN); 409 sbuf_bcat(&sb, rsdt->OemId, ACPI_OEM_ID_SIZE); 410 sbuf_trim(&sb); 411 sbuf_putc(&sb, ' '); 412 sbuf_bcat(&sb, rsdt->OemTableId, ACPI_OEM_TABLE_ID_SIZE); 413 sbuf_trim(&sb); 414 sbuf_finish(&sb); 415 sbuf_delete(&sb); 416 AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER)); 417 418 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%x", ACPI_CA_VERSION); 419 420 return (0); 421 } 422 423 /* 424 * Fetch some descriptive data from ACPI to put in our attach message. 425 */ 426 static int 427 acpi_probe(device_t dev) 428 { 429 430 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 431 432 device_set_desc(dev, acpi_desc); 433 434 return_VALUE (BUS_PROBE_NOWILDCARD); 435 } 436 437 static int 438 acpi_attach(device_t dev) 439 { 440 struct acpi_softc *sc; 441 ACPI_STATUS status; 442 int error, state; 443 UINT32 flags; 444 UINT8 TypeA, TypeB; 445 char *env; 446 447 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 448 449 sc = device_get_softc(dev); 450 sc->acpi_dev = dev; 451 callout_init(&sc->susp_force_to, TRUE); 452 453 error = ENXIO; 454 455 /* Initialize resource manager. */ 456 acpi_rman_io.rm_type = RMAN_ARRAY; 457 acpi_rman_io.rm_start = 0; 458 acpi_rman_io.rm_end = 0xffff; 459 acpi_rman_io.rm_descr = "ACPI I/O ports"; 460 if (rman_init(&acpi_rman_io) != 0) 461 panic("acpi rman_init IO ports failed"); 462 acpi_rman_mem.rm_type = RMAN_ARRAY; 463 acpi_rman_mem.rm_start = 0; 464 acpi_rman_mem.rm_end = ~0ul; 465 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses"; 466 if (rman_init(&acpi_rman_mem) != 0) 467 panic("acpi rman_init memory failed"); 468 469 /* Initialise the ACPI mutex */ 470 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF); 471 472 /* 473 * Set the globals from our tunables. This is needed because ACPI-CA 474 * uses UINT8 for some values and we have no tunable_byte. 475 */ 476 AcpiGbl_AllMethodsSerialized = acpi_serialize_methods ? TRUE : FALSE; 477 AcpiGbl_EnableInterpreterSlack = acpi_interpreter_slack ? TRUE : FALSE; 478 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE; 479 480 #ifndef ACPI_DEBUG 481 /* 482 * Disable all debugging layers and levels. 483 */ 484 AcpiDbgLayer = 0; 485 AcpiDbgLevel = 0; 486 #endif 487 488 /* Start up the ACPI CA subsystem. */ 489 status = AcpiInitializeSubsystem(); 490 if (ACPI_FAILURE(status)) { 491 device_printf(dev, "Could not initialize Subsystem: %s\n", 492 AcpiFormatException(status)); 493 goto out; 494 } 495 496 /* Override OS interfaces if the user requested. */ 497 acpi_reset_interfaces(dev); 498 499 /* Load ACPI name space. */ 500 status = AcpiLoadTables(); 501 if (ACPI_FAILURE(status)) { 502 device_printf(dev, "Could not load Namespace: %s\n", 503 AcpiFormatException(status)); 504 goto out; 505 } 506 507 #if defined(__i386__) || defined(__amd64__) 508 /* Handle MCFG table if present. */ 509 acpi_enable_pcie(); 510 #endif 511 512 /* 513 * Note that some systems (specifically, those with namespace evaluation 514 * issues that require the avoidance of parts of the namespace) must 515 * avoid running _INI and _STA on everything, as well as dodging the final 516 * object init pass. 517 * 518 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 519 * 520 * XXX We should arrange for the object init pass after we have attached 521 * all our child devices, but on many systems it works here. 522 */ 523 flags = 0; 524 if (testenv("debug.acpi.avoid")) 525 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 526 527 /* Bring the hardware and basic handlers online. */ 528 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 529 device_printf(dev, "Could not enable ACPI: %s\n", 530 AcpiFormatException(status)); 531 goto out; 532 } 533 534 /* 535 * Call the ECDT probe function to provide EC functionality before 536 * the namespace has been evaluated. 537 * 538 * XXX This happens before the sysresource devices have been probed and 539 * attached so its resources come from nexus0. In practice, this isn't 540 * a problem but should be addressed eventually. 541 */ 542 acpi_ec_ecdt_probe(dev); 543 544 /* Bring device objects and regions online. */ 545 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 546 device_printf(dev, "Could not initialize ACPI objects: %s\n", 547 AcpiFormatException(status)); 548 goto out; 549 } 550 551 /* 552 * Setup our sysctl tree. 553 * 554 * XXX: This doesn't check to make sure that none of these fail. 555 */ 556 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 557 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 558 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 559 device_get_name(dev), CTLFLAG_RD, 0, ""); 560 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 561 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 562 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 563 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 564 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 565 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 566 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 567 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 568 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 569 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 570 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 571 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 572 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 573 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 574 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 575 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 576 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 577 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 578 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 579 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0, 580 "sleep delay in seconds"); 581 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 582 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode"); 583 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 584 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode"); 585 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 586 OID_AUTO, "disable_on_reboot", CTLFLAG_RW, 587 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system"); 588 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 589 OID_AUTO, "handle_reboot", CTLFLAG_RW, 590 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot"); 591 592 /* 593 * Default to 1 second before sleeping to give some machines time to 594 * stabilize. 595 */ 596 sc->acpi_sleep_delay = 1; 597 if (bootverbose) 598 sc->acpi_verbose = 1; 599 if ((env = getenv("hw.acpi.verbose")) != NULL) { 600 if (strcmp(env, "0") != 0) 601 sc->acpi_verbose = 1; 602 freeenv(env); 603 } 604 605 /* Only enable reboot by default if the FADT says it is available. */ 606 if (AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) 607 sc->acpi_handle_reboot = 1; 608 609 /* Only enable S4BIOS by default if the FACS says it is available. */ 610 if (AcpiGbl_FACS->Flags & ACPI_FACS_S4_BIOS_PRESENT) 611 sc->acpi_s4bios = 1; 612 613 /* Probe all supported sleep states. */ 614 acpi_sleep_states[ACPI_STATE_S0] = TRUE; 615 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++) 616 if (ACPI_SUCCESS(AcpiEvaluateObject(ACPI_ROOT_OBJECT, 617 __DECONST(char *, AcpiGbl_SleepStateNames[state]), NULL, NULL)) && 618 ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) 619 acpi_sleep_states[state] = TRUE; 620 621 /* 622 * Dispatch the default sleep state to devices. The lid switch is set 623 * to UNKNOWN by default to avoid surprising users. 624 */ 625 sc->acpi_power_button_sx = acpi_sleep_states[ACPI_STATE_S5] ? 626 ACPI_STATE_S5 : ACPI_STATE_UNKNOWN; 627 sc->acpi_lid_switch_sx = ACPI_STATE_UNKNOWN; 628 sc->acpi_standby_sx = acpi_sleep_states[ACPI_STATE_S1] ? 629 ACPI_STATE_S1 : ACPI_STATE_UNKNOWN; 630 sc->acpi_suspend_sx = acpi_sleep_states[ACPI_STATE_S3] ? 631 ACPI_STATE_S3 : ACPI_STATE_UNKNOWN; 632 633 /* Pick the first valid sleep state for the sleep button default. */ 634 sc->acpi_sleep_button_sx = ACPI_STATE_UNKNOWN; 635 for (state = ACPI_STATE_S1; state <= ACPI_STATE_S4; state++) 636 if (acpi_sleep_states[state]) { 637 sc->acpi_sleep_button_sx = state; 638 break; 639 } 640 641 acpi_enable_fixed_events(sc); 642 643 /* 644 * Scan the namespace and attach/initialise children. 645 */ 646 647 /* Register our shutdown handler. */ 648 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 649 SHUTDOWN_PRI_LAST); 650 651 /* 652 * Register our acpi event handlers. 653 * XXX should be configurable eg. via userland policy manager. 654 */ 655 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 656 sc, ACPI_EVENT_PRI_LAST); 657 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 658 sc, ACPI_EVENT_PRI_LAST); 659 660 /* Flag our initial states. */ 661 sc->acpi_enabled = TRUE; 662 sc->acpi_sstate = ACPI_STATE_S0; 663 sc->acpi_sleep_disabled = TRUE; 664 665 /* Create the control device */ 666 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644, 667 "acpi"); 668 sc->acpi_dev_t->si_drv1 = sc; 669 670 if ((error = acpi_machdep_init(dev))) 671 goto out; 672 673 /* Register ACPI again to pass the correct argument of pm_func. */ 674 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 675 676 if (!acpi_disabled("bus")) 677 acpi_probe_children(dev); 678 679 /* Update all GPEs and enable runtime GPEs. */ 680 status = AcpiUpdateAllGpes(); 681 if (ACPI_FAILURE(status)) 682 device_printf(dev, "Could not update all GPEs: %s\n", 683 AcpiFormatException(status)); 684 685 /* Allow sleep request after a while. */ 686 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); 687 688 error = 0; 689 690 out: 691 return_VALUE (error); 692 } 693 694 static void 695 acpi_set_power_children(device_t dev, int state) 696 { 697 device_t child, parent; 698 device_t *devlist; 699 int dstate, i, numdevs; 700 701 if (device_get_children(dev, &devlist, &numdevs) != 0) 702 return; 703 704 /* 705 * Retrieve and set D-state for the sleep state if _SxD is present. 706 * Skip children who aren't attached since they are handled separately. 707 */ 708 parent = device_get_parent(dev); 709 for (i = 0; i < numdevs; i++) { 710 child = devlist[i]; 711 dstate = state; 712 if (device_is_attached(child) && 713 acpi_device_pwr_for_sleep(parent, dev, &dstate) == 0) 714 acpi_set_powerstate(child, dstate); 715 } 716 free(devlist, M_TEMP); 717 } 718 719 static int 720 acpi_suspend(device_t dev) 721 { 722 int error; 723 724 GIANT_REQUIRED; 725 726 error = bus_generic_suspend(dev); 727 if (error == 0) 728 acpi_set_power_children(dev, ACPI_STATE_D3); 729 730 return (error); 731 } 732 733 static int 734 acpi_resume(device_t dev) 735 { 736 737 GIANT_REQUIRED; 738 739 acpi_set_power_children(dev, ACPI_STATE_D0); 740 741 return (bus_generic_resume(dev)); 742 } 743 744 static int 745 acpi_shutdown(device_t dev) 746 { 747 748 GIANT_REQUIRED; 749 750 /* Allow children to shutdown first. */ 751 bus_generic_shutdown(dev); 752 753 /* 754 * Enable any GPEs that are able to power-on the system (i.e., RTC). 755 * Also, disable any that are not valid for this state (most). 756 */ 757 acpi_wake_prep_walk(ACPI_STATE_S5); 758 759 return (0); 760 } 761 762 /* 763 * Handle a new device being added 764 */ 765 static device_t 766 acpi_add_child(device_t bus, u_int order, const char *name, int unit) 767 { 768 struct acpi_device *ad; 769 device_t child; 770 771 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 772 return (NULL); 773 774 resource_list_init(&ad->ad_rl); 775 776 child = device_add_child_ordered(bus, order, name, unit); 777 if (child != NULL) 778 device_set_ivars(child, ad); 779 else 780 free(ad, M_ACPIDEV); 781 return (child); 782 } 783 784 static int 785 acpi_print_child(device_t bus, device_t child) 786 { 787 struct acpi_device *adev = device_get_ivars(child); 788 struct resource_list *rl = &adev->ad_rl; 789 int retval = 0; 790 791 retval += bus_print_child_header(bus, child); 792 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 793 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 794 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 795 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 796 if (device_get_flags(child)) 797 retval += printf(" flags %#x", device_get_flags(child)); 798 retval += bus_print_child_footer(bus, child); 799 800 return (retval); 801 } 802 803 /* 804 * If this device is an ACPI child but no one claimed it, attempt 805 * to power it off. We'll power it back up when a driver is added. 806 * 807 * XXX Disabled for now since many necessary devices (like fdc and 808 * ATA) don't claim the devices we created for them but still expect 809 * them to be powered up. 810 */ 811 static void 812 acpi_probe_nomatch(device_t bus, device_t child) 813 { 814 #ifdef ACPI_ENABLE_POWERDOWN_NODRIVER 815 acpi_set_powerstate(child, ACPI_STATE_D3); 816 #endif 817 } 818 819 /* 820 * If a new driver has a chance to probe a child, first power it up. 821 * 822 * XXX Disabled for now (see acpi_probe_nomatch for details). 823 */ 824 static void 825 acpi_driver_added(device_t dev, driver_t *driver) 826 { 827 device_t child, *devlist; 828 int i, numdevs; 829 830 DEVICE_IDENTIFY(driver, dev); 831 if (device_get_children(dev, &devlist, &numdevs)) 832 return; 833 for (i = 0; i < numdevs; i++) { 834 child = devlist[i]; 835 if (device_get_state(child) == DS_NOTPRESENT) { 836 #ifdef ACPI_ENABLE_POWERDOWN_NODRIVER 837 acpi_set_powerstate(child, ACPI_STATE_D0); 838 if (device_probe_and_attach(child) != 0) 839 acpi_set_powerstate(child, ACPI_STATE_D3); 840 #else 841 device_probe_and_attach(child); 842 #endif 843 } 844 } 845 free(devlist, M_TEMP); 846 } 847 848 /* Location hint for devctl(8) */ 849 static int 850 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf, 851 size_t buflen) 852 { 853 struct acpi_device *dinfo = device_get_ivars(child); 854 855 if (dinfo->ad_handle) 856 snprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle)); 857 else 858 snprintf(buf, buflen, "unknown"); 859 return (0); 860 } 861 862 /* PnP information for devctl(8) */ 863 static int 864 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 865 size_t buflen) 866 { 867 struct acpi_device *dinfo = device_get_ivars(child); 868 ACPI_DEVICE_INFO *adinfo; 869 870 if (ACPI_FAILURE(AcpiGetObjectInfo(dinfo->ad_handle, &adinfo))) { 871 snprintf(buf, buflen, "unknown"); 872 return (0); 873 } 874 875 snprintf(buf, buflen, "_HID=%s _UID=%lu", 876 (adinfo->Valid & ACPI_VALID_HID) ? 877 adinfo->HardwareId.String : "none", 878 (adinfo->Valid & ACPI_VALID_UID) ? 879 strtoul(adinfo->UniqueId.String, NULL, 10) : 0UL); 880 AcpiOsFree(adinfo); 881 882 return (0); 883 } 884 885 /* 886 * Handle per-device ivars 887 */ 888 static int 889 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 890 { 891 struct acpi_device *ad; 892 893 if ((ad = device_get_ivars(child)) == NULL) { 894 device_printf(child, "device has no ivars\n"); 895 return (ENOENT); 896 } 897 898 /* ACPI and ISA compatibility ivars */ 899 switch(index) { 900 case ACPI_IVAR_HANDLE: 901 *(ACPI_HANDLE *)result = ad->ad_handle; 902 break; 903 case ACPI_IVAR_PRIVATE: 904 *(void **)result = ad->ad_private; 905 break; 906 case ACPI_IVAR_FLAGS: 907 *(int *)result = ad->ad_flags; 908 break; 909 case ISA_IVAR_VENDORID: 910 case ISA_IVAR_SERIAL: 911 case ISA_IVAR_COMPATID: 912 *(int *)result = -1; 913 break; 914 case ISA_IVAR_LOGICALID: 915 *(int *)result = acpi_isa_get_logicalid(child); 916 break; 917 default: 918 return (ENOENT); 919 } 920 921 return (0); 922 } 923 924 static int 925 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 926 { 927 struct acpi_device *ad; 928 929 if ((ad = device_get_ivars(child)) == NULL) { 930 device_printf(child, "device has no ivars\n"); 931 return (ENOENT); 932 } 933 934 switch(index) { 935 case ACPI_IVAR_HANDLE: 936 ad->ad_handle = (ACPI_HANDLE)value; 937 break; 938 case ACPI_IVAR_PRIVATE: 939 ad->ad_private = (void *)value; 940 break; 941 case ACPI_IVAR_FLAGS: 942 ad->ad_flags = (int)value; 943 break; 944 default: 945 panic("bad ivar write request (%d)", index); 946 return (ENOENT); 947 } 948 949 return (0); 950 } 951 952 /* 953 * Handle child resource allocation/removal 954 */ 955 static struct resource_list * 956 acpi_get_rlist(device_t dev, device_t child) 957 { 958 struct acpi_device *ad; 959 960 ad = device_get_ivars(child); 961 return (&ad->ad_rl); 962 } 963 964 static int 965 acpi_match_resource_hint(device_t dev, int type, long value) 966 { 967 struct acpi_device *ad = device_get_ivars(dev); 968 struct resource_list *rl = &ad->ad_rl; 969 struct resource_list_entry *rle; 970 971 STAILQ_FOREACH(rle, rl, link) { 972 if (rle->type != type) 973 continue; 974 if (rle->start <= value && rle->end >= value) 975 return (1); 976 } 977 return (0); 978 } 979 980 /* 981 * Wire device unit numbers based on resource matches in hints. 982 */ 983 static void 984 acpi_hint_device_unit(device_t acdev, device_t child, const char *name, 985 int *unitp) 986 { 987 const char *s; 988 long value; 989 int line, matches, unit; 990 991 /* 992 * Iterate over all the hints for the devices with the specified 993 * name to see if one's resources are a subset of this device. 994 */ 995 line = 0; 996 for (;;) { 997 if (resource_find_dev(&line, name, &unit, "at", NULL) != 0) 998 break; 999 1000 /* Must have an "at" for acpi or isa. */ 1001 resource_string_value(name, unit, "at", &s); 1002 if (!(strcmp(s, "acpi0") == 0 || strcmp(s, "acpi") == 0 || 1003 strcmp(s, "isa0") == 0 || strcmp(s, "isa") == 0)) 1004 continue; 1005 1006 /* 1007 * Check for matching resources. We must have at least one match. 1008 * Since I/O and memory resources cannot be shared, if we get a 1009 * match on either of those, ignore any mismatches in IRQs or DRQs. 1010 * 1011 * XXX: We may want to revisit this to be more lenient and wire 1012 * as long as it gets one match. 1013 */ 1014 matches = 0; 1015 if (resource_long_value(name, unit, "port", &value) == 0) { 1016 /* 1017 * Floppy drive controllers are notorious for having a 1018 * wide variety of resources not all of which include the 1019 * first port that is specified by the hint (typically 1020 * 0x3f0) (see the comment above fdc_isa_alloc_resources() 1021 * in fdc_isa.c). However, they do all seem to include 1022 * port + 2 (e.g. 0x3f2) so for a floppy device, look for 1023 * 'value + 2' in the port resources instead of the hint 1024 * value. 1025 */ 1026 if (strcmp(name, "fdc") == 0) 1027 value += 2; 1028 if (acpi_match_resource_hint(child, SYS_RES_IOPORT, value)) 1029 matches++; 1030 else 1031 continue; 1032 } 1033 if (resource_long_value(name, unit, "maddr", &value) == 0) { 1034 if (acpi_match_resource_hint(child, SYS_RES_MEMORY, value)) 1035 matches++; 1036 else 1037 continue; 1038 } 1039 if (matches > 0) 1040 goto matched; 1041 if (resource_long_value(name, unit, "irq", &value) == 0) { 1042 if (acpi_match_resource_hint(child, SYS_RES_IRQ, value)) 1043 matches++; 1044 else 1045 continue; 1046 } 1047 if (resource_long_value(name, unit, "drq", &value) == 0) { 1048 if (acpi_match_resource_hint(child, SYS_RES_DRQ, value)) 1049 matches++; 1050 else 1051 continue; 1052 } 1053 1054 matched: 1055 if (matches > 0) { 1056 /* We have a winner! */ 1057 *unitp = unit; 1058 break; 1059 } 1060 } 1061 } 1062 1063 /* 1064 * Pre-allocate/manage all memory and IO resources. Since rman can't handle 1065 * duplicates, we merge any in the sysresource attach routine. 1066 */ 1067 static int 1068 acpi_sysres_alloc(device_t dev) 1069 { 1070 struct resource *res; 1071 struct resource_list *rl; 1072 struct resource_list_entry *rle; 1073 struct rman *rm; 1074 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 1075 device_t *children; 1076 int child_count, i; 1077 1078 /* 1079 * Probe/attach any sysresource devices. This would be unnecessary if we 1080 * had multi-pass probe/attach. 1081 */ 1082 if (device_get_children(dev, &children, &child_count) != 0) 1083 return (ENXIO); 1084 for (i = 0; i < child_count; i++) { 1085 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 1086 device_probe_and_attach(children[i]); 1087 } 1088 free(children, M_TEMP); 1089 1090 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev); 1091 STAILQ_FOREACH(rle, rl, link) { 1092 if (rle->res != NULL) { 1093 device_printf(dev, "duplicate resource for %lx\n", rle->start); 1094 continue; 1095 } 1096 1097 /* Only memory and IO resources are valid here. */ 1098 switch (rle->type) { 1099 case SYS_RES_IOPORT: 1100 rm = &acpi_rman_io; 1101 break; 1102 case SYS_RES_MEMORY: 1103 rm = &acpi_rman_mem; 1104 break; 1105 default: 1106 continue; 1107 } 1108 1109 /* Pre-allocate resource and add to our rman pool. */ 1110 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type, 1111 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 0); 1112 if (res != NULL) { 1113 rman_manage_region(rm, rman_get_start(res), rman_get_end(res)); 1114 rle->res = res; 1115 } else 1116 device_printf(dev, "reservation of %lx, %lx (%d) failed\n", 1117 rle->start, rle->count, rle->type); 1118 } 1119 return (0); 1120 } 1121 1122 static char *pcilink_ids[] = { "PNP0C0F", NULL }; 1123 static char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 1124 1125 /* 1126 * Reserve declared resources for devices found during attach once system 1127 * resources have been allocated. 1128 */ 1129 static void 1130 acpi_reserve_resources(device_t dev) 1131 { 1132 struct resource_list_entry *rle; 1133 struct resource_list *rl; 1134 struct acpi_device *ad; 1135 struct acpi_softc *sc; 1136 device_t *children; 1137 int child_count, i; 1138 1139 sc = device_get_softc(dev); 1140 if (device_get_children(dev, &children, &child_count) != 0) 1141 return; 1142 for (i = 0; i < child_count; i++) { 1143 ad = device_get_ivars(children[i]); 1144 rl = &ad->ad_rl; 1145 1146 /* Don't reserve system resources. */ 1147 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 1148 continue; 1149 1150 STAILQ_FOREACH(rle, rl, link) { 1151 /* 1152 * Don't reserve IRQ resources. There are many sticky things 1153 * to get right otherwise (e.g. IRQs for psm, atkbd, and HPET 1154 * when using legacy routing). 1155 */ 1156 if (rle->type == SYS_RES_IRQ) 1157 continue; 1158 1159 /* 1160 * Don't reserve the resource if it is already allocated. 1161 * The acpi_ec(4) driver can allocate its resources early 1162 * if ECDT is present. 1163 */ 1164 if (rle->res != NULL) 1165 continue; 1166 1167 /* 1168 * Try to reserve the resource from our parent. If this 1169 * fails because the resource is a system resource, just 1170 * let it be. The resource range is already reserved so 1171 * that other devices will not use it. If the driver 1172 * needs to allocate the resource, then 1173 * acpi_alloc_resource() will sub-alloc from the system 1174 * resource. 1175 */ 1176 resource_list_reserve(rl, dev, children[i], rle->type, &rle->rid, 1177 rle->start, rle->end, rle->count, 0); 1178 } 1179 } 1180 free(children, M_TEMP); 1181 sc->acpi_resources_reserved = 1; 1182 } 1183 1184 static int 1185 acpi_set_resource(device_t dev, device_t child, int type, int rid, 1186 u_long start, u_long count) 1187 { 1188 struct acpi_softc *sc = device_get_softc(dev); 1189 struct acpi_device *ad = device_get_ivars(child); 1190 struct resource_list *rl = &ad->ad_rl; 1191 ACPI_DEVICE_INFO *devinfo; 1192 u_long end; 1193 1194 /* Ignore IRQ resources for PCI link devices. */ 1195 if (type == SYS_RES_IRQ && ACPI_ID_PROBE(dev, child, pcilink_ids) != NULL) 1196 return (0); 1197 1198 /* 1199 * Ignore most resources for PCI root bridges. Some BIOSes 1200 * incorrectly enumerate the memory ranges they decode as plain 1201 * memory resources instead of as ResourceProducer ranges. Other 1202 * BIOSes incorrectly list system resource entries for I/O ranges 1203 * under the PCI bridge. Do allow the one known-correct case on 1204 * x86 of a PCI bridge claiming the I/O ports used for PCI config 1205 * access. 1206 */ 1207 if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) { 1208 if (ACPI_SUCCESS(AcpiGetObjectInfo(ad->ad_handle, &devinfo))) { 1209 if ((devinfo->Flags & ACPI_PCI_ROOT_BRIDGE) != 0) { 1210 #if defined(__i386__) || defined(__amd64__) 1211 if (!(type == SYS_RES_IOPORT && start == CONF1_ADDR_PORT)) 1212 #endif 1213 { 1214 AcpiOsFree(devinfo); 1215 return (0); 1216 } 1217 } 1218 AcpiOsFree(devinfo); 1219 } 1220 } 1221 1222 /* If the resource is already allocated, fail. */ 1223 if (resource_list_busy(rl, type, rid)) 1224 return (EBUSY); 1225 1226 /* If the resource is already reserved, release it. */ 1227 if (resource_list_reserved(rl, type, rid)) 1228 resource_list_unreserve(rl, dev, child, type, rid); 1229 1230 /* Add the resource. */ 1231 end = (start + count - 1); 1232 resource_list_add(rl, type, rid, start, end, count); 1233 1234 /* Don't reserve resources until the system resources are allocated. */ 1235 if (!sc->acpi_resources_reserved) 1236 return (0); 1237 1238 /* Don't reserve system resources. */ 1239 if (ACPI_ID_PROBE(dev, child, sysres_ids) != NULL) 1240 return (0); 1241 1242 /* 1243 * Don't reserve IRQ resources. There are many sticky things to 1244 * get right otherwise (e.g. IRQs for psm, atkbd, and HPET when 1245 * using legacy routing). 1246 */ 1247 if (type == SYS_RES_IRQ) 1248 return (0); 1249 1250 /* 1251 * Reserve the resource. 1252 * 1253 * XXX: Ignores failure for now. Failure here is probably a 1254 * BIOS/firmware bug? 1255 */ 1256 resource_list_reserve(rl, dev, child, type, &rid, start, end, count, 0); 1257 return (0); 1258 } 1259 1260 static struct resource * 1261 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 1262 u_long start, u_long end, u_long count, u_int flags) 1263 { 1264 ACPI_RESOURCE ares; 1265 struct acpi_device *ad; 1266 struct resource_list_entry *rle; 1267 struct resource_list *rl; 1268 struct resource *res; 1269 int isdefault = (start == 0UL && end == ~0UL); 1270 1271 /* 1272 * First attempt at allocating the resource. For direct children, 1273 * use resource_list_alloc() to handle reserved resources. For 1274 * other devices, pass the request up to our parent. 1275 */ 1276 if (bus == device_get_parent(child)) { 1277 ad = device_get_ivars(child); 1278 rl = &ad->ad_rl; 1279 1280 /* 1281 * Simulate the behavior of the ISA bus for direct children 1282 * devices. That is, if a non-default range is specified for 1283 * a resource that doesn't exist, use bus_set_resource() to 1284 * add the resource before allocating it. Note that these 1285 * resources will not be reserved. 1286 */ 1287 if (!isdefault && resource_list_find(rl, type, *rid) == NULL) 1288 resource_list_add(rl, type, *rid, start, end, count); 1289 res = resource_list_alloc(rl, bus, child, type, rid, start, end, count, 1290 flags); 1291 if (res != NULL && type == SYS_RES_IRQ) { 1292 /* 1293 * Since bus_config_intr() takes immediate effect, we cannot 1294 * configure the interrupt associated with a device when we 1295 * parse the resources but have to defer it until a driver 1296 * actually allocates the interrupt via bus_alloc_resource(). 1297 * 1298 * XXX: Should we handle the lookup failing? 1299 */ 1300 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares))) 1301 acpi_config_intr(child, &ares); 1302 } 1303 1304 /* 1305 * If this is an allocation of the "default" range for a given 1306 * RID, fetch the exact bounds for this resource from the 1307 * resource list entry to try to allocate the range from the 1308 * system resource regions. 1309 */ 1310 if (res == NULL && isdefault) { 1311 rle = resource_list_find(rl, type, *rid); 1312 if (rle != NULL) { 1313 start = rle->start; 1314 end = rle->end; 1315 count = rle->count; 1316 } 1317 } 1318 } else 1319 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid, 1320 start, end, count, flags); 1321 1322 /* 1323 * If the first attempt failed and this is an allocation of a 1324 * specific range, try to satisfy the request via a suballocation 1325 * from our system resource regions. 1326 */ 1327 if (res == NULL && start + count - 1 == end) 1328 res = acpi_alloc_sysres(child, type, rid, start, end, count, flags); 1329 return (res); 1330 } 1331 1332 /* 1333 * Attempt to allocate a specific resource range from the system 1334 * resource ranges. Note that we only handle memory and I/O port 1335 * system resources. 1336 */ 1337 struct resource * 1338 acpi_alloc_sysres(device_t child, int type, int *rid, u_long start, u_long end, 1339 u_long count, u_int flags) 1340 { 1341 struct rman *rm; 1342 struct resource *res; 1343 1344 switch (type) { 1345 case SYS_RES_IOPORT: 1346 rm = &acpi_rman_io; 1347 break; 1348 case SYS_RES_MEMORY: 1349 rm = &acpi_rman_mem; 1350 break; 1351 default: 1352 return (NULL); 1353 } 1354 1355 KASSERT(start + count - 1 == end, ("wildcard resource range")); 1356 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE, 1357 child); 1358 if (res == NULL) 1359 return (NULL); 1360 1361 rman_set_rid(res, *rid); 1362 1363 /* If requested, activate the resource using the parent's method. */ 1364 if (flags & RF_ACTIVE) 1365 if (bus_activate_resource(child, type, *rid, res) != 0) { 1366 rman_release_resource(res); 1367 return (NULL); 1368 } 1369 1370 return (res); 1371 } 1372 1373 static int 1374 acpi_is_resource_managed(int type, struct resource *r) 1375 { 1376 1377 /* We only handle memory and IO resources through rman. */ 1378 switch (type) { 1379 case SYS_RES_IOPORT: 1380 return (rman_is_region_manager(r, &acpi_rman_io)); 1381 case SYS_RES_MEMORY: 1382 return (rman_is_region_manager(r, &acpi_rman_mem)); 1383 } 1384 return (0); 1385 } 1386 1387 static int 1388 acpi_adjust_resource(device_t bus, device_t child, int type, struct resource *r, 1389 u_long start, u_long end) 1390 { 1391 1392 if (acpi_is_resource_managed(type, r)) 1393 return (rman_adjust_resource(r, start, end)); 1394 return (bus_generic_adjust_resource(bus, child, type, r, start, end)); 1395 } 1396 1397 static int 1398 acpi_release_resource(device_t bus, device_t child, int type, int rid, 1399 struct resource *r) 1400 { 1401 int ret; 1402 1403 /* 1404 * If this resource belongs to one of our internal managers, 1405 * deactivate it and release it to the local pool. 1406 */ 1407 if (acpi_is_resource_managed(type, r)) { 1408 if (rman_get_flags(r) & RF_ACTIVE) { 1409 ret = bus_deactivate_resource(child, type, rid, r); 1410 if (ret != 0) 1411 return (ret); 1412 } 1413 return (rman_release_resource(r)); 1414 } 1415 1416 return (bus_generic_rl_release_resource(bus, child, type, rid, r)); 1417 } 1418 1419 static void 1420 acpi_delete_resource(device_t bus, device_t child, int type, int rid) 1421 { 1422 struct resource_list *rl; 1423 1424 rl = acpi_get_rlist(bus, child); 1425 if (resource_list_busy(rl, type, rid)) { 1426 device_printf(bus, "delete_resource: Resource still owned by child" 1427 " (type=%d, rid=%d)\n", type, rid); 1428 return; 1429 } 1430 resource_list_unreserve(rl, bus, child, type, rid); 1431 resource_list_delete(rl, type, rid); 1432 } 1433 1434 /* Allocate an IO port or memory resource, given its GAS. */ 1435 int 1436 acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas, 1437 struct resource **res, u_int flags) 1438 { 1439 int error, res_type; 1440 1441 error = ENOMEM; 1442 if (type == NULL || rid == NULL || gas == NULL || res == NULL) 1443 return (EINVAL); 1444 1445 /* We only support memory and IO spaces. */ 1446 switch (gas->SpaceId) { 1447 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1448 res_type = SYS_RES_MEMORY; 1449 break; 1450 case ACPI_ADR_SPACE_SYSTEM_IO: 1451 res_type = SYS_RES_IOPORT; 1452 break; 1453 default: 1454 return (EOPNOTSUPP); 1455 } 1456 1457 /* 1458 * If the register width is less than 8, assume the BIOS author means 1459 * it is a bit field and just allocate a byte. 1460 */ 1461 if (gas->BitWidth && gas->BitWidth < 8) 1462 gas->BitWidth = 8; 1463 1464 /* Validate the address after we're sure we support the space. */ 1465 if (gas->Address == 0 || gas->BitWidth == 0) 1466 return (EINVAL); 1467 1468 bus_set_resource(dev, res_type, *rid, gas->Address, 1469 gas->BitWidth / 8); 1470 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags); 1471 if (*res != NULL) { 1472 *type = res_type; 1473 error = 0; 1474 } else 1475 bus_delete_resource(dev, res_type, *rid); 1476 1477 return (error); 1478 } 1479 1480 /* Probe _HID and _CID for compatible ISA PNP ids. */ 1481 static uint32_t 1482 acpi_isa_get_logicalid(device_t dev) 1483 { 1484 ACPI_DEVICE_INFO *devinfo; 1485 ACPI_HANDLE h; 1486 uint32_t pnpid; 1487 1488 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1489 1490 /* Fetch and validate the HID. */ 1491 if ((h = acpi_get_handle(dev)) == NULL || 1492 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1493 return_VALUE (0); 1494 1495 pnpid = (devinfo->Valid & ACPI_VALID_HID) != 0 && 1496 devinfo->HardwareId.Length >= ACPI_EISAID_STRING_SIZE ? 1497 PNP_EISAID(devinfo->HardwareId.String) : 0; 1498 AcpiOsFree(devinfo); 1499 1500 return_VALUE (pnpid); 1501 } 1502 1503 static int 1504 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 1505 { 1506 ACPI_DEVICE_INFO *devinfo; 1507 ACPI_PNP_DEVICE_ID *ids; 1508 ACPI_HANDLE h; 1509 uint32_t *pnpid; 1510 int i, valid; 1511 1512 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1513 1514 pnpid = cids; 1515 1516 /* Fetch and validate the CID */ 1517 if ((h = acpi_get_handle(dev)) == NULL || 1518 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1519 return_VALUE (0); 1520 1521 if ((devinfo->Valid & ACPI_VALID_CID) == 0) { 1522 AcpiOsFree(devinfo); 1523 return_VALUE (0); 1524 } 1525 1526 if (devinfo->CompatibleIdList.Count < count) 1527 count = devinfo->CompatibleIdList.Count; 1528 ids = devinfo->CompatibleIdList.Ids; 1529 for (i = 0, valid = 0; i < count; i++) 1530 if (ids[i].Length >= ACPI_EISAID_STRING_SIZE && 1531 strncmp(ids[i].String, "PNP", 3) == 0) { 1532 *pnpid++ = PNP_EISAID(ids[i].String); 1533 valid++; 1534 } 1535 AcpiOsFree(devinfo); 1536 1537 return_VALUE (valid); 1538 } 1539 1540 static char * 1541 acpi_device_id_probe(device_t bus, device_t dev, char **ids) 1542 { 1543 ACPI_HANDLE h; 1544 ACPI_OBJECT_TYPE t; 1545 int i; 1546 1547 h = acpi_get_handle(dev); 1548 if (ids == NULL || h == NULL) 1549 return (NULL); 1550 t = acpi_get_type(dev); 1551 if (t != ACPI_TYPE_DEVICE && t != ACPI_TYPE_PROCESSOR) 1552 return (NULL); 1553 1554 /* Try to match one of the array of IDs with a HID or CID. */ 1555 for (i = 0; ids[i] != NULL; i++) { 1556 if (acpi_MatchHid(h, ids[i])) 1557 return (ids[i]); 1558 } 1559 return (NULL); 1560 } 1561 1562 static ACPI_STATUS 1563 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname, 1564 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret) 1565 { 1566 ACPI_HANDLE h; 1567 1568 if (dev == NULL) 1569 h = ACPI_ROOT_OBJECT; 1570 else if ((h = acpi_get_handle(dev)) == NULL) 1571 return (AE_BAD_PARAMETER); 1572 return (AcpiEvaluateObject(h, pathname, parameters, ret)); 1573 } 1574 1575 int 1576 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate) 1577 { 1578 struct acpi_softc *sc; 1579 ACPI_HANDLE handle; 1580 ACPI_STATUS status; 1581 char sxd[8]; 1582 1583 handle = acpi_get_handle(dev); 1584 1585 /* 1586 * XXX If we find these devices, don't try to power them down. 1587 * The serial and IRDA ports on my T23 hang the system when 1588 * set to D3 and it appears that such legacy devices may 1589 * need special handling in their drivers. 1590 */ 1591 if (dstate == NULL || handle == NULL || 1592 acpi_MatchHid(handle, "PNP0500") || 1593 acpi_MatchHid(handle, "PNP0501") || 1594 acpi_MatchHid(handle, "PNP0502") || 1595 acpi_MatchHid(handle, "PNP0510") || 1596 acpi_MatchHid(handle, "PNP0511")) 1597 return (ENXIO); 1598 1599 /* 1600 * Override next state with the value from _SxD, if present. 1601 * Note illegal _S0D is evaluated because some systems expect this. 1602 */ 1603 sc = device_get_softc(bus); 1604 snprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate); 1605 status = acpi_GetInteger(handle, sxd, dstate); 1606 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { 1607 device_printf(dev, "failed to get %s on %s: %s\n", sxd, 1608 acpi_name(handle), AcpiFormatException(status)); 1609 return (ENXIO); 1610 } 1611 1612 return (0); 1613 } 1614 1615 /* Callback arg for our implementation of walking the namespace. */ 1616 struct acpi_device_scan_ctx { 1617 acpi_scan_cb_t user_fn; 1618 void *arg; 1619 ACPI_HANDLE parent; 1620 }; 1621 1622 static ACPI_STATUS 1623 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval) 1624 { 1625 struct acpi_device_scan_ctx *ctx; 1626 device_t dev, old_dev; 1627 ACPI_STATUS status; 1628 ACPI_OBJECT_TYPE type; 1629 1630 /* 1631 * Skip this device if we think we'll have trouble with it or it is 1632 * the parent where the scan began. 1633 */ 1634 ctx = (struct acpi_device_scan_ctx *)arg; 1635 if (acpi_avoid(h) || h == ctx->parent) 1636 return (AE_OK); 1637 1638 /* If this is not a valid device type (e.g., a method), skip it. */ 1639 if (ACPI_FAILURE(AcpiGetType(h, &type))) 1640 return (AE_OK); 1641 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR && 1642 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER) 1643 return (AE_OK); 1644 1645 /* 1646 * Call the user function with the current device. If it is unchanged 1647 * afterwards, return. Otherwise, we update the handle to the new dev. 1648 */ 1649 old_dev = acpi_get_device(h); 1650 dev = old_dev; 1651 status = ctx->user_fn(h, &dev, level, ctx->arg); 1652 if (ACPI_FAILURE(status) || old_dev == dev) 1653 return (status); 1654 1655 /* Remove the old child and its connection to the handle. */ 1656 if (old_dev != NULL) { 1657 device_delete_child(device_get_parent(old_dev), old_dev); 1658 AcpiDetachData(h, acpi_fake_objhandler); 1659 } 1660 1661 /* Recreate the handle association if the user created a device. */ 1662 if (dev != NULL) 1663 AcpiAttachData(h, acpi_fake_objhandler, dev); 1664 1665 return (AE_OK); 1666 } 1667 1668 static ACPI_STATUS 1669 acpi_device_scan_children(device_t bus, device_t dev, int max_depth, 1670 acpi_scan_cb_t user_fn, void *arg) 1671 { 1672 ACPI_HANDLE h; 1673 struct acpi_device_scan_ctx ctx; 1674 1675 if (acpi_disabled("children")) 1676 return (AE_OK); 1677 1678 if (dev == NULL) 1679 h = ACPI_ROOT_OBJECT; 1680 else if ((h = acpi_get_handle(dev)) == NULL) 1681 return (AE_BAD_PARAMETER); 1682 ctx.user_fn = user_fn; 1683 ctx.arg = arg; 1684 ctx.parent = h; 1685 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth, 1686 acpi_device_scan_cb, NULL, &ctx, NULL)); 1687 } 1688 1689 /* 1690 * Even though ACPI devices are not PCI, we use the PCI approach for setting 1691 * device power states since it's close enough to ACPI. 1692 */ 1693 static int 1694 acpi_set_powerstate(device_t child, int state) 1695 { 1696 ACPI_HANDLE h; 1697 ACPI_STATUS status; 1698 1699 h = acpi_get_handle(child); 1700 if (state < ACPI_STATE_D0 || state > ACPI_D_STATES_MAX) 1701 return (EINVAL); 1702 if (h == NULL) 1703 return (0); 1704 1705 /* Ignore errors if the power methods aren't present. */ 1706 status = acpi_pwr_switch_consumer(h, state); 1707 if (ACPI_SUCCESS(status)) { 1708 if (bootverbose) 1709 device_printf(child, "set ACPI power state D%d on %s\n", 1710 state, acpi_name(h)); 1711 } else if (status != AE_NOT_FOUND) 1712 device_printf(child, 1713 "failed to set ACPI power state D%d on %s: %s\n", state, 1714 acpi_name(h), AcpiFormatException(status)); 1715 1716 return (0); 1717 } 1718 1719 static int 1720 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 1721 { 1722 int result, cid_count, i; 1723 uint32_t lid, cids[8]; 1724 1725 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1726 1727 /* 1728 * ISA-style drivers attached to ACPI may persist and 1729 * probe manually if we return ENOENT. We never want 1730 * that to happen, so don't ever return it. 1731 */ 1732 result = ENXIO; 1733 1734 /* Scan the supplied IDs for a match */ 1735 lid = acpi_isa_get_logicalid(child); 1736 cid_count = acpi_isa_get_compatid(child, cids, 8); 1737 while (ids && ids->ip_id) { 1738 if (lid == ids->ip_id) { 1739 result = 0; 1740 goto out; 1741 } 1742 for (i = 0; i < cid_count; i++) { 1743 if (cids[i] == ids->ip_id) { 1744 result = 0; 1745 goto out; 1746 } 1747 } 1748 ids++; 1749 } 1750 1751 out: 1752 if (result == 0 && ids->ip_desc) 1753 device_set_desc(child, ids->ip_desc); 1754 1755 return_VALUE (result); 1756 } 1757 1758 #if defined(__i386__) || defined(__amd64__) 1759 /* 1760 * Look for a MCFG table. If it is present, use the settings for 1761 * domain (segment) 0 to setup PCI config space access via the memory 1762 * map. 1763 */ 1764 static void 1765 acpi_enable_pcie(void) 1766 { 1767 ACPI_TABLE_HEADER *hdr; 1768 ACPI_MCFG_ALLOCATION *alloc, *end; 1769 ACPI_STATUS status; 1770 1771 status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr); 1772 if (ACPI_FAILURE(status)) 1773 return; 1774 1775 end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length); 1776 alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1); 1777 while (alloc < end) { 1778 if (alloc->PciSegment == 0) { 1779 pcie_cfgregopen(alloc->Address, alloc->StartBusNumber, 1780 alloc->EndBusNumber); 1781 return; 1782 } 1783 alloc++; 1784 } 1785 } 1786 #endif 1787 1788 /* 1789 * Scan all of the ACPI namespace and attach child devices. 1790 * 1791 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and 1792 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec. 1793 * However, in violation of the spec, some systems place their PCI link 1794 * devices in \, so we have to walk the whole namespace. We check the 1795 * type of namespace nodes, so this should be ok. 1796 */ 1797 static void 1798 acpi_probe_children(device_t bus) 1799 { 1800 1801 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1802 1803 /* 1804 * Scan the namespace and insert placeholders for all the devices that 1805 * we find. We also probe/attach any early devices. 1806 * 1807 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1808 * we want to create nodes for all devices, not just those that are 1809 * currently present. (This assumes that we don't want to create/remove 1810 * devices as they appear, which might be smarter.) 1811 */ 1812 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1813 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, acpi_probe_child, 1814 NULL, bus, NULL); 1815 1816 /* Pre-allocate resources for our rman from any sysresource devices. */ 1817 acpi_sysres_alloc(bus); 1818 1819 /* Reserve resources already allocated to children. */ 1820 acpi_reserve_resources(bus); 1821 1822 /* Create any static children by calling device identify methods. */ 1823 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1824 bus_generic_probe(bus); 1825 1826 /* Probe/attach all children, created statically and from the namespace. */ 1827 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "acpi bus_generic_attach\n")); 1828 bus_generic_attach(bus); 1829 1830 /* Attach wake sysctls. */ 1831 acpi_wake_sysctl_walk(bus); 1832 1833 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1834 return_VOID; 1835 } 1836 1837 /* 1838 * Determine the probe order for a given device. 1839 */ 1840 static void 1841 acpi_probe_order(ACPI_HANDLE handle, int *order) 1842 { 1843 ACPI_OBJECT_TYPE type; 1844 1845 /* 1846 * 0. CPUs 1847 * 1. I/O port and memory system resource holders 1848 * 2. Clocks and timers (to handle early accesses) 1849 * 3. Embedded controllers (to handle early accesses) 1850 * 4. PCI Link Devices 1851 */ 1852 AcpiGetType(handle, &type); 1853 if (type == ACPI_TYPE_PROCESSOR) 1854 *order = 0; 1855 else if (acpi_MatchHid(handle, "PNP0C01") || 1856 acpi_MatchHid(handle, "PNP0C02")) 1857 *order = 1; 1858 else if (acpi_MatchHid(handle, "PNP0100") || 1859 acpi_MatchHid(handle, "PNP0103") || 1860 acpi_MatchHid(handle, "PNP0B00")) 1861 *order = 2; 1862 else if (acpi_MatchHid(handle, "PNP0C09")) 1863 *order = 3; 1864 else if (acpi_MatchHid(handle, "PNP0C0F")) 1865 *order = 4; 1866 } 1867 1868 /* 1869 * Evaluate a child device and determine whether we might attach a device to 1870 * it. 1871 */ 1872 static ACPI_STATUS 1873 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1874 { 1875 struct acpi_prw_data prw; 1876 ACPI_OBJECT_TYPE type; 1877 ACPI_HANDLE h; 1878 device_t bus, child; 1879 char *handle_str; 1880 int order; 1881 1882 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1883 1884 if (acpi_disabled("children")) 1885 return_ACPI_STATUS (AE_OK); 1886 1887 /* Skip this device if we think we'll have trouble with it. */ 1888 if (acpi_avoid(handle)) 1889 return_ACPI_STATUS (AE_OK); 1890 1891 bus = (device_t)context; 1892 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1893 handle_str = acpi_name(handle); 1894 switch (type) { 1895 case ACPI_TYPE_DEVICE: 1896 /* 1897 * Since we scan from \, be sure to skip system scope objects. 1898 * \_SB_ and \_TZ_ are defined in ACPICA as devices to work around 1899 * BIOS bugs. For example, \_SB_ is to allow \_SB_._INI to be run 1900 * during the intialization and \_TZ_ is to support Notify() on it. 1901 */ 1902 if (strcmp(handle_str, "\\_SB_") == 0 || 1903 strcmp(handle_str, "\\_TZ_") == 0) 1904 break; 1905 if (acpi_parse_prw(handle, &prw) == 0) 1906 AcpiSetupGpeForWake(handle, prw.gpe_handle, prw.gpe_bit); 1907 1908 /* 1909 * Ignore devices that do not have a _HID or _CID. They should 1910 * be discovered by other buses (e.g. the PCI bus driver). 1911 */ 1912 if (!acpi_has_hid(handle)) 1913 break; 1914 /* FALLTHROUGH */ 1915 case ACPI_TYPE_PROCESSOR: 1916 case ACPI_TYPE_THERMAL: 1917 case ACPI_TYPE_POWER: 1918 /* 1919 * Create a placeholder device for this node. Sort the 1920 * placeholder so that the probe/attach passes will run 1921 * breadth-first. Orders less than ACPI_DEV_BASE_ORDER 1922 * are reserved for special objects (i.e., system 1923 * resources). 1924 */ 1925 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str)); 1926 order = level * 10 + ACPI_DEV_BASE_ORDER; 1927 acpi_probe_order(handle, &order); 1928 child = BUS_ADD_CHILD(bus, order, NULL, -1); 1929 if (child == NULL) 1930 break; 1931 1932 /* Associate the handle with the device_t and vice versa. */ 1933 acpi_set_handle(child, handle); 1934 AcpiAttachData(handle, acpi_fake_objhandler, child); 1935 1936 /* 1937 * Check that the device is present. If it's not present, 1938 * leave it disabled (so that we have a device_t attached to 1939 * the handle, but we don't probe it). 1940 * 1941 * XXX PCI link devices sometimes report "present" but not 1942 * "functional" (i.e. if disabled). Go ahead and probe them 1943 * anyway since we may enable them later. 1944 */ 1945 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 1946 /* Never disable PCI link devices. */ 1947 if (acpi_MatchHid(handle, "PNP0C0F")) 1948 break; 1949 /* 1950 * Docking stations should remain enabled since the system 1951 * may be undocked at boot. 1952 */ 1953 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h))) 1954 break; 1955 1956 device_disable(child); 1957 break; 1958 } 1959 1960 /* 1961 * Get the device's resource settings and attach them. 1962 * Note that if the device has _PRS but no _CRS, we need 1963 * to decide when it's appropriate to try to configure the 1964 * device. Ignore the return value here; it's OK for the 1965 * device not to have any resources. 1966 */ 1967 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 1968 break; 1969 } 1970 } 1971 1972 return_ACPI_STATUS (AE_OK); 1973 } 1974 1975 /* 1976 * AcpiAttachData() requires an object handler but never uses it. This is a 1977 * placeholder object handler so we can store a device_t in an ACPI_HANDLE. 1978 */ 1979 void 1980 acpi_fake_objhandler(ACPI_HANDLE h, void *data) 1981 { 1982 } 1983 1984 static void 1985 acpi_shutdown_final(void *arg, int howto) 1986 { 1987 struct acpi_softc *sc = (struct acpi_softc *)arg; 1988 register_t intr; 1989 ACPI_STATUS status; 1990 1991 /* 1992 * XXX Shutdown code should only run on the BSP (cpuid 0). 1993 * Some chipsets do not power off the system correctly if called from 1994 * an AP. 1995 */ 1996 if ((howto & RB_POWEROFF) != 0) { 1997 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 1998 if (ACPI_FAILURE(status)) { 1999 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2000 AcpiFormatException(status)); 2001 return; 2002 } 2003 device_printf(sc->acpi_dev, "Powering system off\n"); 2004 intr = intr_disable(); 2005 status = AcpiEnterSleepState(ACPI_STATE_S5); 2006 if (ACPI_FAILURE(status)) { 2007 intr_restore(intr); 2008 device_printf(sc->acpi_dev, "power-off failed - %s\n", 2009 AcpiFormatException(status)); 2010 } else { 2011 DELAY(1000000); 2012 intr_restore(intr); 2013 device_printf(sc->acpi_dev, "power-off failed - timeout\n"); 2014 } 2015 } else if ((howto & RB_HALT) == 0 && sc->acpi_handle_reboot) { 2016 /* Reboot using the reset register. */ 2017 status = AcpiReset(); 2018 if (ACPI_SUCCESS(status)) { 2019 DELAY(1000000); 2020 device_printf(sc->acpi_dev, "reset failed - timeout\n"); 2021 } else if (status != AE_NOT_EXIST) 2022 device_printf(sc->acpi_dev, "reset failed - %s\n", 2023 AcpiFormatException(status)); 2024 } else if (sc->acpi_do_disable && panicstr == NULL) { 2025 /* 2026 * Only disable ACPI if the user requested. On some systems, writing 2027 * the disable value to SMI_CMD hangs the system. 2028 */ 2029 device_printf(sc->acpi_dev, "Shutting down\n"); 2030 AcpiTerminate(); 2031 } 2032 } 2033 2034 static void 2035 acpi_enable_fixed_events(struct acpi_softc *sc) 2036 { 2037 static int first_time = 1; 2038 2039 /* Enable and clear fixed events and install handlers. */ 2040 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) { 2041 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 2042 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 2043 acpi_event_power_button_sleep, sc); 2044 if (first_time) 2045 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 2046 } 2047 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) { 2048 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 2049 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 2050 acpi_event_sleep_button_sleep, sc); 2051 if (first_time) 2052 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 2053 } 2054 2055 first_time = 0; 2056 } 2057 2058 /* 2059 * Returns true if the device is actually present and should 2060 * be attached to. This requires the present, enabled, UI-visible 2061 * and diagnostics-passed bits to be set. 2062 */ 2063 BOOLEAN 2064 acpi_DeviceIsPresent(device_t dev) 2065 { 2066 ACPI_DEVICE_INFO *devinfo; 2067 ACPI_HANDLE h; 2068 BOOLEAN present; 2069 2070 if ((h = acpi_get_handle(dev)) == NULL || 2071 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2072 return (FALSE); 2073 2074 /* If no _STA method, must be present */ 2075 present = (devinfo->Valid & ACPI_VALID_STA) == 0 || 2076 ACPI_DEVICE_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE; 2077 2078 AcpiOsFree(devinfo); 2079 return (present); 2080 } 2081 2082 /* 2083 * Returns true if the battery is actually present and inserted. 2084 */ 2085 BOOLEAN 2086 acpi_BatteryIsPresent(device_t dev) 2087 { 2088 ACPI_DEVICE_INFO *devinfo; 2089 ACPI_HANDLE h; 2090 BOOLEAN present; 2091 2092 if ((h = acpi_get_handle(dev)) == NULL || 2093 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2094 return (FALSE); 2095 2096 /* If no _STA method, must be present */ 2097 present = (devinfo->Valid & ACPI_VALID_STA) == 0 || 2098 ACPI_BATTERY_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE; 2099 2100 AcpiOsFree(devinfo); 2101 return (present); 2102 } 2103 2104 /* 2105 * Returns true if a device has at least one valid device ID. 2106 */ 2107 static BOOLEAN 2108 acpi_has_hid(ACPI_HANDLE h) 2109 { 2110 ACPI_DEVICE_INFO *devinfo; 2111 BOOLEAN ret; 2112 2113 if (h == NULL || 2114 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2115 return (FALSE); 2116 2117 ret = FALSE; 2118 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 2119 ret = TRUE; 2120 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) 2121 if (devinfo->CompatibleIdList.Count > 0) 2122 ret = TRUE; 2123 2124 AcpiOsFree(devinfo); 2125 return (ret); 2126 } 2127 2128 /* 2129 * Match a HID string against a handle 2130 */ 2131 BOOLEAN 2132 acpi_MatchHid(ACPI_HANDLE h, const char *hid) 2133 { 2134 ACPI_DEVICE_INFO *devinfo; 2135 BOOLEAN ret; 2136 int i; 2137 2138 if (hid == NULL || h == NULL || 2139 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2140 return (FALSE); 2141 2142 ret = FALSE; 2143 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 2144 strcmp(hid, devinfo->HardwareId.String) == 0) 2145 ret = TRUE; 2146 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) 2147 for (i = 0; i < devinfo->CompatibleIdList.Count; i++) { 2148 if (strcmp(hid, devinfo->CompatibleIdList.Ids[i].String) == 0) { 2149 ret = TRUE; 2150 break; 2151 } 2152 } 2153 2154 AcpiOsFree(devinfo); 2155 return (ret); 2156 } 2157 2158 /* 2159 * Return the handle of a named object within our scope, ie. that of (parent) 2160 * or one if its parents. 2161 */ 2162 ACPI_STATUS 2163 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 2164 { 2165 ACPI_HANDLE r; 2166 ACPI_STATUS status; 2167 2168 /* Walk back up the tree to the root */ 2169 for (;;) { 2170 status = AcpiGetHandle(parent, path, &r); 2171 if (ACPI_SUCCESS(status)) { 2172 *result = r; 2173 return (AE_OK); 2174 } 2175 /* XXX Return error here? */ 2176 if (status != AE_NOT_FOUND) 2177 return (AE_OK); 2178 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 2179 return (AE_NOT_FOUND); 2180 parent = r; 2181 } 2182 } 2183 2184 /* 2185 * Allocate a buffer with a preset data size. 2186 */ 2187 ACPI_BUFFER * 2188 acpi_AllocBuffer(int size) 2189 { 2190 ACPI_BUFFER *buf; 2191 2192 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 2193 return (NULL); 2194 buf->Length = size; 2195 buf->Pointer = (void *)(buf + 1); 2196 return (buf); 2197 } 2198 2199 ACPI_STATUS 2200 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 2201 { 2202 ACPI_OBJECT arg1; 2203 ACPI_OBJECT_LIST args; 2204 2205 arg1.Type = ACPI_TYPE_INTEGER; 2206 arg1.Integer.Value = number; 2207 args.Count = 1; 2208 args.Pointer = &arg1; 2209 2210 return (AcpiEvaluateObject(handle, path, &args, NULL)); 2211 } 2212 2213 /* 2214 * Evaluate a path that should return an integer. 2215 */ 2216 ACPI_STATUS 2217 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 2218 { 2219 ACPI_STATUS status; 2220 ACPI_BUFFER buf; 2221 ACPI_OBJECT param; 2222 2223 if (handle == NULL) 2224 handle = ACPI_ROOT_OBJECT; 2225 2226 /* 2227 * Assume that what we've been pointed at is an Integer object, or 2228 * a method that will return an Integer. 2229 */ 2230 buf.Pointer = ¶m; 2231 buf.Length = sizeof(param); 2232 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2233 if (ACPI_SUCCESS(status)) { 2234 if (param.Type == ACPI_TYPE_INTEGER) 2235 *number = param.Integer.Value; 2236 else 2237 status = AE_TYPE; 2238 } 2239 2240 /* 2241 * In some applications, a method that's expected to return an Integer 2242 * may instead return a Buffer (probably to simplify some internal 2243 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 2244 * convert it into an Integer as best we can. 2245 * 2246 * This is a hack. 2247 */ 2248 if (status == AE_BUFFER_OVERFLOW) { 2249 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 2250 status = AE_NO_MEMORY; 2251 } else { 2252 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2253 if (ACPI_SUCCESS(status)) 2254 status = acpi_ConvertBufferToInteger(&buf, number); 2255 AcpiOsFree(buf.Pointer); 2256 } 2257 } 2258 return (status); 2259 } 2260 2261 ACPI_STATUS 2262 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 2263 { 2264 ACPI_OBJECT *p; 2265 UINT8 *val; 2266 int i; 2267 2268 p = (ACPI_OBJECT *)bufp->Pointer; 2269 if (p->Type == ACPI_TYPE_INTEGER) { 2270 *number = p->Integer.Value; 2271 return (AE_OK); 2272 } 2273 if (p->Type != ACPI_TYPE_BUFFER) 2274 return (AE_TYPE); 2275 if (p->Buffer.Length > sizeof(int)) 2276 return (AE_BAD_DATA); 2277 2278 *number = 0; 2279 val = p->Buffer.Pointer; 2280 for (i = 0; i < p->Buffer.Length; i++) 2281 *number += val[i] << (i * 8); 2282 return (AE_OK); 2283 } 2284 2285 /* 2286 * Iterate over the elements of an a package object, calling the supplied 2287 * function for each element. 2288 * 2289 * XXX possible enhancement might be to abort traversal on error. 2290 */ 2291 ACPI_STATUS 2292 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 2293 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 2294 { 2295 ACPI_OBJECT *comp; 2296 int i; 2297 2298 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 2299 return (AE_BAD_PARAMETER); 2300 2301 /* Iterate over components */ 2302 i = 0; 2303 comp = pkg->Package.Elements; 2304 for (; i < pkg->Package.Count; i++, comp++) 2305 func(comp, arg); 2306 2307 return (AE_OK); 2308 } 2309 2310 /* 2311 * Find the (index)th resource object in a set. 2312 */ 2313 ACPI_STATUS 2314 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 2315 { 2316 ACPI_RESOURCE *rp; 2317 int i; 2318 2319 rp = (ACPI_RESOURCE *)buf->Pointer; 2320 i = index; 2321 while (i-- > 0) { 2322 /* Range check */ 2323 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2324 return (AE_BAD_PARAMETER); 2325 2326 /* Check for terminator */ 2327 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2328 return (AE_NOT_FOUND); 2329 rp = ACPI_NEXT_RESOURCE(rp); 2330 } 2331 if (resp != NULL) 2332 *resp = rp; 2333 2334 return (AE_OK); 2335 } 2336 2337 /* 2338 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 2339 * 2340 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 2341 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 2342 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 2343 * resources. 2344 */ 2345 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 2346 2347 ACPI_STATUS 2348 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 2349 { 2350 ACPI_RESOURCE *rp; 2351 void *newp; 2352 2353 /* Initialise the buffer if necessary. */ 2354 if (buf->Pointer == NULL) { 2355 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 2356 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 2357 return (AE_NO_MEMORY); 2358 rp = (ACPI_RESOURCE *)buf->Pointer; 2359 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2360 rp->Length = ACPI_RS_SIZE_MIN; 2361 } 2362 if (res == NULL) 2363 return (AE_OK); 2364 2365 /* 2366 * Scan the current buffer looking for the terminator. 2367 * This will either find the terminator or hit the end 2368 * of the buffer and return an error. 2369 */ 2370 rp = (ACPI_RESOURCE *)buf->Pointer; 2371 for (;;) { 2372 /* Range check, don't go outside the buffer */ 2373 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2374 return (AE_BAD_PARAMETER); 2375 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2376 break; 2377 rp = ACPI_NEXT_RESOURCE(rp); 2378 } 2379 2380 /* 2381 * Check the size of the buffer and expand if required. 2382 * 2383 * Required size is: 2384 * size of existing resources before terminator + 2385 * size of new resource and header + 2386 * size of terminator. 2387 * 2388 * Note that this loop should really only run once, unless 2389 * for some reason we are stuffing a *really* huge resource. 2390 */ 2391 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 2392 res->Length + ACPI_RS_SIZE_NO_DATA + 2393 ACPI_RS_SIZE_MIN) >= buf->Length) { 2394 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 2395 return (AE_NO_MEMORY); 2396 bcopy(buf->Pointer, newp, buf->Length); 2397 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 2398 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 2399 AcpiOsFree(buf->Pointer); 2400 buf->Pointer = newp; 2401 buf->Length += buf->Length; 2402 } 2403 2404 /* Insert the new resource. */ 2405 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA); 2406 2407 /* And add the terminator. */ 2408 rp = ACPI_NEXT_RESOURCE(rp); 2409 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2410 rp->Length = ACPI_RS_SIZE_MIN; 2411 2412 return (AE_OK); 2413 } 2414 2415 /* 2416 * Set interrupt model. 2417 */ 2418 ACPI_STATUS 2419 acpi_SetIntrModel(int model) 2420 { 2421 2422 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 2423 } 2424 2425 /* 2426 * Walk subtables of a table and call a callback routine for each 2427 * subtable. The caller should provide the first subtable and a 2428 * pointer to the end of the table. This can be used to walk tables 2429 * such as MADT and SRAT that use subtable entries. 2430 */ 2431 void 2432 acpi_walk_subtables(void *first, void *end, acpi_subtable_handler *handler, 2433 void *arg) 2434 { 2435 ACPI_SUBTABLE_HEADER *entry; 2436 2437 for (entry = first; (void *)entry < end; ) { 2438 /* Avoid an infinite loop if we hit a bogus entry. */ 2439 if (entry->Length < sizeof(ACPI_SUBTABLE_HEADER)) 2440 return; 2441 2442 handler(entry, arg); 2443 entry = ACPI_ADD_PTR(ACPI_SUBTABLE_HEADER, entry, entry->Length); 2444 } 2445 } 2446 2447 /* 2448 * DEPRECATED. This interface has serious deficiencies and will be 2449 * removed. 2450 * 2451 * Immediately enter the sleep state. In the old model, acpiconf(8) ran 2452 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this. 2453 */ 2454 ACPI_STATUS 2455 acpi_SetSleepState(struct acpi_softc *sc, int state) 2456 { 2457 static int once; 2458 2459 if (!once) { 2460 device_printf(sc->acpi_dev, 2461 "warning: acpi_SetSleepState() deprecated, need to update your software\n"); 2462 once = 1; 2463 } 2464 return (acpi_EnterSleepState(sc, state)); 2465 } 2466 2467 #if defined(__amd64__) || defined(__i386__) 2468 static void 2469 acpi_sleep_force_task(void *context) 2470 { 2471 struct acpi_softc *sc = (struct acpi_softc *)context; 2472 2473 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2474 device_printf(sc->acpi_dev, "force sleep state S%d failed\n", 2475 sc->acpi_next_sstate); 2476 } 2477 2478 static void 2479 acpi_sleep_force(void *arg) 2480 { 2481 struct acpi_softc *sc = (struct acpi_softc *)arg; 2482 2483 device_printf(sc->acpi_dev, 2484 "suspend request timed out, forcing sleep now\n"); 2485 /* 2486 * XXX Suspending from callout cause the freeze in DEVICE_SUSPEND(). 2487 * Suspend from acpi_task thread in stead. 2488 */ 2489 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 2490 acpi_sleep_force_task, sc))) 2491 device_printf(sc->acpi_dev, "AcpiOsExecute() for sleeping failed\n"); 2492 } 2493 #endif 2494 2495 /* 2496 * Request that the system enter the given suspend state. All /dev/apm 2497 * devices and devd(8) will be notified. Userland then has a chance to 2498 * save state and acknowledge the request. The system sleeps once all 2499 * acks are in. 2500 */ 2501 int 2502 acpi_ReqSleepState(struct acpi_softc *sc, int state) 2503 { 2504 #if defined(__amd64__) || defined(__i386__) 2505 struct apm_clone_data *clone; 2506 ACPI_STATUS status; 2507 2508 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX) 2509 return (EINVAL); 2510 if (!acpi_sleep_states[state]) 2511 return (EOPNOTSUPP); 2512 2513 /* If a suspend request is already in progress, just return. */ 2514 if (sc->acpi_next_sstate != 0) { 2515 return (0); 2516 } 2517 2518 /* Wait until sleep is enabled. */ 2519 while (sc->acpi_sleep_disabled) { 2520 AcpiOsSleep(1000); 2521 } 2522 2523 ACPI_LOCK(acpi); 2524 2525 sc->acpi_next_sstate = state; 2526 2527 /* S5 (soft-off) should be entered directly with no waiting. */ 2528 if (state == ACPI_STATE_S5) { 2529 ACPI_UNLOCK(acpi); 2530 status = acpi_EnterSleepState(sc, state); 2531 return (ACPI_SUCCESS(status) ? 0 : ENXIO); 2532 } 2533 2534 /* Record the pending state and notify all apm devices. */ 2535 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2536 clone->notify_status = APM_EV_NONE; 2537 if ((clone->flags & ACPI_EVF_DEVD) == 0) { 2538 selwakeuppri(&clone->sel_read, PZERO); 2539 KNOTE_LOCKED(&clone->sel_read.si_note, 0); 2540 } 2541 } 2542 2543 /* If devd(8) is not running, immediately enter the sleep state. */ 2544 if (!devctl_process_running()) { 2545 ACPI_UNLOCK(acpi); 2546 status = acpi_EnterSleepState(sc, state); 2547 return (ACPI_SUCCESS(status) ? 0 : ENXIO); 2548 } 2549 2550 /* 2551 * Set a timeout to fire if userland doesn't ack the suspend request 2552 * in time. This way we still eventually go to sleep if we were 2553 * overheating or running low on battery, even if userland is hung. 2554 * We cancel this timeout once all userland acks are in or the 2555 * suspend request is aborted. 2556 */ 2557 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc); 2558 ACPI_UNLOCK(acpi); 2559 2560 /* Now notify devd(8) also. */ 2561 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state); 2562 2563 return (0); 2564 #else 2565 /* This platform does not support acpi suspend/resume. */ 2566 return (EOPNOTSUPP); 2567 #endif 2568 } 2569 2570 /* 2571 * Acknowledge (or reject) a pending sleep state. The caller has 2572 * prepared for suspend and is now ready for it to proceed. If the 2573 * error argument is non-zero, it indicates suspend should be cancelled 2574 * and gives an errno value describing why. Once all votes are in, 2575 * we suspend the system. 2576 */ 2577 int 2578 acpi_AckSleepState(struct apm_clone_data *clone, int error) 2579 { 2580 #if defined(__amd64__) || defined(__i386__) 2581 struct acpi_softc *sc; 2582 int ret, sleeping; 2583 2584 /* If no pending sleep state, return an error. */ 2585 ACPI_LOCK(acpi); 2586 sc = clone->acpi_sc; 2587 if (sc->acpi_next_sstate == 0) { 2588 ACPI_UNLOCK(acpi); 2589 return (ENXIO); 2590 } 2591 2592 /* Caller wants to abort suspend process. */ 2593 if (error) { 2594 sc->acpi_next_sstate = 0; 2595 callout_stop(&sc->susp_force_to); 2596 device_printf(sc->acpi_dev, 2597 "listener on %s cancelled the pending suspend\n", 2598 devtoname(clone->cdev)); 2599 ACPI_UNLOCK(acpi); 2600 return (0); 2601 } 2602 2603 /* 2604 * Mark this device as acking the suspend request. Then, walk through 2605 * all devices, seeing if they agree yet. We only count devices that 2606 * are writable since read-only devices couldn't ack the request. 2607 */ 2608 sleeping = TRUE; 2609 clone->notify_status = APM_EV_ACKED; 2610 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2611 if ((clone->flags & ACPI_EVF_WRITE) != 0 && 2612 clone->notify_status != APM_EV_ACKED) { 2613 sleeping = FALSE; 2614 break; 2615 } 2616 } 2617 2618 /* If all devices have voted "yes", we will suspend now. */ 2619 if (sleeping) 2620 callout_stop(&sc->susp_force_to); 2621 ACPI_UNLOCK(acpi); 2622 ret = 0; 2623 if (sleeping) { 2624 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2625 ret = ENODEV; 2626 } 2627 return (ret); 2628 #else 2629 /* This platform does not support acpi suspend/resume. */ 2630 return (EOPNOTSUPP); 2631 #endif 2632 } 2633 2634 static void 2635 acpi_sleep_enable(void *arg) 2636 { 2637 struct acpi_softc *sc = (struct acpi_softc *)arg; 2638 2639 /* Reschedule if the system is not fully up and running. */ 2640 if (!AcpiGbl_SystemAwakeAndRunning) { 2641 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); 2642 return; 2643 } 2644 2645 ACPI_LOCK(acpi); 2646 sc->acpi_sleep_disabled = FALSE; 2647 ACPI_UNLOCK(acpi); 2648 } 2649 2650 static ACPI_STATUS 2651 acpi_sleep_disable(struct acpi_softc *sc) 2652 { 2653 ACPI_STATUS status; 2654 2655 /* Fail if the system is not fully up and running. */ 2656 if (!AcpiGbl_SystemAwakeAndRunning) 2657 return (AE_ERROR); 2658 2659 ACPI_LOCK(acpi); 2660 status = sc->acpi_sleep_disabled ? AE_ERROR : AE_OK; 2661 sc->acpi_sleep_disabled = TRUE; 2662 ACPI_UNLOCK(acpi); 2663 2664 return (status); 2665 } 2666 2667 enum acpi_sleep_state { 2668 ACPI_SS_NONE, 2669 ACPI_SS_GPE_SET, 2670 ACPI_SS_DEV_SUSPEND, 2671 ACPI_SS_SLP_PREP, 2672 ACPI_SS_SLEPT, 2673 }; 2674 2675 /* 2676 * Enter the desired system sleep state. 2677 * 2678 * Currently we support S1-S5 but S4 is only S4BIOS 2679 */ 2680 static ACPI_STATUS 2681 acpi_EnterSleepState(struct acpi_softc *sc, int state) 2682 { 2683 register_t intr; 2684 ACPI_STATUS status; 2685 ACPI_EVENT_STATUS power_button_status; 2686 enum acpi_sleep_state slp_state; 2687 int sleep_result; 2688 2689 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2690 2691 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX) 2692 return_ACPI_STATUS (AE_BAD_PARAMETER); 2693 if (!acpi_sleep_states[state]) { 2694 device_printf(sc->acpi_dev, "Sleep state S%d not supported by BIOS\n", 2695 state); 2696 return (AE_SUPPORT); 2697 } 2698 2699 /* Re-entry once we're suspending is not allowed. */ 2700 status = acpi_sleep_disable(sc); 2701 if (ACPI_FAILURE(status)) { 2702 device_printf(sc->acpi_dev, 2703 "suspend request ignored (not ready yet)\n"); 2704 return (status); 2705 } 2706 2707 if (state == ACPI_STATE_S5) { 2708 /* 2709 * Shut down cleanly and power off. This will call us back through the 2710 * shutdown handlers. 2711 */ 2712 shutdown_nice(RB_POWEROFF); 2713 return_ACPI_STATUS (AE_OK); 2714 } 2715 2716 EVENTHANDLER_INVOKE(power_suspend); 2717 2718 if (smp_started) { 2719 thread_lock(curthread); 2720 sched_bind(curthread, 0); 2721 thread_unlock(curthread); 2722 } 2723 2724 /* 2725 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE 2726 * drivers need this. 2727 */ 2728 mtx_lock(&Giant); 2729 2730 slp_state = ACPI_SS_NONE; 2731 2732 sc->acpi_sstate = state; 2733 2734 /* Enable any GPEs as appropriate and requested by the user. */ 2735 acpi_wake_prep_walk(state); 2736 slp_state = ACPI_SS_GPE_SET; 2737 2738 /* 2739 * Inform all devices that we are going to sleep. If at least one 2740 * device fails, DEVICE_SUSPEND() automatically resumes the tree. 2741 * 2742 * XXX Note that a better two-pass approach with a 'veto' pass 2743 * followed by a "real thing" pass would be better, but the current 2744 * bus interface does not provide for this. 2745 */ 2746 if (DEVICE_SUSPEND(root_bus) != 0) { 2747 device_printf(sc->acpi_dev, "device_suspend failed\n"); 2748 goto backout; 2749 } 2750 slp_state = ACPI_SS_DEV_SUSPEND; 2751 2752 /* If testing device suspend only, back out of everything here. */ 2753 if (acpi_susp_bounce) 2754 goto backout; 2755 2756 status = AcpiEnterSleepStatePrep(state); 2757 if (ACPI_FAILURE(status)) { 2758 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2759 AcpiFormatException(status)); 2760 goto backout; 2761 } 2762 slp_state = ACPI_SS_SLP_PREP; 2763 2764 if (sc->acpi_sleep_delay > 0) 2765 DELAY(sc->acpi_sleep_delay * 1000000); 2766 2767 intr = intr_disable(); 2768 if (state != ACPI_STATE_S1) { 2769 sleep_result = acpi_sleep_machdep(sc, state); 2770 acpi_wakeup_machdep(sc, state, sleep_result, 0); 2771 2772 /* 2773 * XXX According to ACPI specification SCI_EN bit should be restored 2774 * by ACPI platform (BIOS, firmware) to its pre-sleep state. 2775 * Unfortunately some BIOSes fail to do that and that leads to 2776 * unexpected and serious consequences during wake up like a system 2777 * getting stuck in SMI handlers. 2778 * This hack is picked up from Linux, which claims that it follows 2779 * Windows behavior. 2780 */ 2781 if (sleep_result == 1 && state != ACPI_STATE_S4) 2782 AcpiWriteBitRegister(ACPI_BITREG_SCI_ENABLE, ACPI_ENABLE_EVENT); 2783 2784 AcpiLeaveSleepStatePrep(state); 2785 2786 if (sleep_result == 1 && state == ACPI_STATE_S3) { 2787 /* 2788 * Prevent mis-interpretation of the wakeup by power button 2789 * as a request for power off. 2790 * Ideally we should post an appropriate wakeup event, 2791 * perhaps using acpi_event_power_button_wake or alike. 2792 * 2793 * Clearing of power button status after wakeup is mandated 2794 * by ACPI specification in section "Fixed Power Button". 2795 * 2796 * XXX As of ACPICA 20121114 AcpiGetEventStatus provides 2797 * status as 0/1 corressponding to inactive/active despite 2798 * its type being ACPI_EVENT_STATUS. In other words, 2799 * we should not test for ACPI_EVENT_FLAG_SET for time being. 2800 */ 2801 if (ACPI_SUCCESS(AcpiGetEventStatus(ACPI_EVENT_POWER_BUTTON, 2802 &power_button_status)) && power_button_status != 0) { 2803 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 2804 device_printf(sc->acpi_dev, 2805 "cleared fixed power button status\n"); 2806 } 2807 } 2808 2809 intr_restore(intr); 2810 2811 /* call acpi_wakeup_machdep() again with interrupt enabled */ 2812 acpi_wakeup_machdep(sc, state, sleep_result, 1); 2813 2814 if (sleep_result == -1) 2815 goto backout; 2816 2817 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 2818 if (state == ACPI_STATE_S4) 2819 AcpiEnable(); 2820 } else { 2821 status = AcpiEnterSleepState(state); 2822 AcpiLeaveSleepStatePrep(state); 2823 intr_restore(intr); 2824 if (ACPI_FAILURE(status)) { 2825 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 2826 AcpiFormatException(status)); 2827 goto backout; 2828 } 2829 } 2830 slp_state = ACPI_SS_SLEPT; 2831 2832 /* 2833 * Back out state according to how far along we got in the suspend 2834 * process. This handles both the error and success cases. 2835 */ 2836 backout: 2837 if (slp_state >= ACPI_SS_GPE_SET) { 2838 acpi_wake_prep_walk(state); 2839 sc->acpi_sstate = ACPI_STATE_S0; 2840 } 2841 if (slp_state >= ACPI_SS_DEV_SUSPEND) 2842 DEVICE_RESUME(root_bus); 2843 if (slp_state >= ACPI_SS_SLP_PREP) 2844 AcpiLeaveSleepState(state); 2845 if (slp_state >= ACPI_SS_SLEPT) { 2846 acpi_resync_clock(sc); 2847 acpi_enable_fixed_events(sc); 2848 } 2849 sc->acpi_next_sstate = 0; 2850 2851 mtx_unlock(&Giant); 2852 2853 if (smp_started) { 2854 thread_lock(curthread); 2855 sched_unbind(curthread); 2856 thread_unlock(curthread); 2857 } 2858 2859 EVENTHANDLER_INVOKE(power_resume); 2860 2861 /* Allow another sleep request after a while. */ 2862 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); 2863 2864 /* Run /etc/rc.resume after we are back. */ 2865 if (devctl_process_running()) 2866 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state); 2867 2868 return_ACPI_STATUS (status); 2869 } 2870 2871 static void 2872 acpi_resync_clock(struct acpi_softc *sc) 2873 { 2874 #ifdef __amd64__ 2875 if (!acpi_reset_clock) 2876 return; 2877 2878 /* 2879 * Warm up timecounter again and reset system clock. 2880 */ 2881 (void)timecounter->tc_get_timecount(timecounter); 2882 (void)timecounter->tc_get_timecount(timecounter); 2883 inittodr(time_second + sc->acpi_sleep_delay); 2884 #endif 2885 } 2886 2887 /* Enable or disable the device's wake GPE. */ 2888 int 2889 acpi_wake_set_enable(device_t dev, int enable) 2890 { 2891 struct acpi_prw_data prw; 2892 ACPI_STATUS status; 2893 int flags; 2894 2895 /* Make sure the device supports waking the system and get the GPE. */ 2896 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 2897 return (ENXIO); 2898 2899 flags = acpi_get_flags(dev); 2900 if (enable) { 2901 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 2902 ACPI_GPE_ENABLE); 2903 if (ACPI_FAILURE(status)) { 2904 device_printf(dev, "enable wake failed\n"); 2905 return (ENXIO); 2906 } 2907 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); 2908 } else { 2909 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 2910 ACPI_GPE_DISABLE); 2911 if (ACPI_FAILURE(status)) { 2912 device_printf(dev, "disable wake failed\n"); 2913 return (ENXIO); 2914 } 2915 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); 2916 } 2917 2918 return (0); 2919 } 2920 2921 static int 2922 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate) 2923 { 2924 struct acpi_prw_data prw; 2925 device_t dev; 2926 2927 /* Check that this is a wake-capable device and get its GPE. */ 2928 if (acpi_parse_prw(handle, &prw) != 0) 2929 return (ENXIO); 2930 dev = acpi_get_device(handle); 2931 2932 /* 2933 * The destination sleep state must be less than (i.e., higher power) 2934 * or equal to the value specified by _PRW. If this GPE cannot be 2935 * enabled for the next sleep state, then disable it. If it can and 2936 * the user requested it be enabled, turn on any required power resources 2937 * and set _PSW. 2938 */ 2939 if (sstate > prw.lowest_wake) { 2940 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_DISABLE); 2941 if (bootverbose) 2942 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n", 2943 acpi_name(handle), sstate); 2944 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) { 2945 acpi_pwr_wake_enable(handle, 1); 2946 acpi_SetInteger(handle, "_PSW", 1); 2947 if (bootverbose) 2948 device_printf(dev, "wake_prep enabled for %s (S%d)\n", 2949 acpi_name(handle), sstate); 2950 } 2951 2952 return (0); 2953 } 2954 2955 static int 2956 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate) 2957 { 2958 struct acpi_prw_data prw; 2959 device_t dev; 2960 2961 /* 2962 * Check that this is a wake-capable device and get its GPE. Return 2963 * now if the user didn't enable this device for wake. 2964 */ 2965 if (acpi_parse_prw(handle, &prw) != 0) 2966 return (ENXIO); 2967 dev = acpi_get_device(handle); 2968 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0) 2969 return (0); 2970 2971 /* 2972 * If this GPE couldn't be enabled for the previous sleep state, it was 2973 * disabled before going to sleep so re-enable it. If it was enabled, 2974 * clear _PSW and turn off any power resources it used. 2975 */ 2976 if (sstate > prw.lowest_wake) { 2977 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_ENABLE); 2978 if (bootverbose) 2979 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle)); 2980 } else { 2981 acpi_SetInteger(handle, "_PSW", 0); 2982 acpi_pwr_wake_enable(handle, 0); 2983 if (bootverbose) 2984 device_printf(dev, "run_prep cleaned up for %s\n", 2985 acpi_name(handle)); 2986 } 2987 2988 return (0); 2989 } 2990 2991 static ACPI_STATUS 2992 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 2993 { 2994 int sstate; 2995 2996 /* If suspending, run the sleep prep function, otherwise wake. */ 2997 sstate = *(int *)context; 2998 if (AcpiGbl_SystemAwakeAndRunning) 2999 acpi_wake_sleep_prep(handle, sstate); 3000 else 3001 acpi_wake_run_prep(handle, sstate); 3002 return (AE_OK); 3003 } 3004 3005 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */ 3006 static int 3007 acpi_wake_prep_walk(int sstate) 3008 { 3009 ACPI_HANDLE sb_handle; 3010 3011 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) 3012 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100, 3013 acpi_wake_prep, NULL, &sstate, NULL); 3014 return (0); 3015 } 3016 3017 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */ 3018 static int 3019 acpi_wake_sysctl_walk(device_t dev) 3020 { 3021 int error, i, numdevs; 3022 device_t *devlist; 3023 device_t child; 3024 ACPI_STATUS status; 3025 3026 error = device_get_children(dev, &devlist, &numdevs); 3027 if (error != 0 || numdevs == 0) { 3028 if (numdevs == 0) 3029 free(devlist, M_TEMP); 3030 return (error); 3031 } 3032 for (i = 0; i < numdevs; i++) { 3033 child = devlist[i]; 3034 acpi_wake_sysctl_walk(child); 3035 if (!device_is_attached(child)) 3036 continue; 3037 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL); 3038 if (ACPI_SUCCESS(status)) { 3039 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child), 3040 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO, 3041 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0, 3042 acpi_wake_set_sysctl, "I", "Device set to wake the system"); 3043 } 3044 } 3045 free(devlist, M_TEMP); 3046 3047 return (0); 3048 } 3049 3050 /* Enable or disable wake from userland. */ 3051 static int 3052 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS) 3053 { 3054 int enable, error; 3055 device_t dev; 3056 3057 dev = (device_t)arg1; 3058 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0; 3059 3060 error = sysctl_handle_int(oidp, &enable, 0, req); 3061 if (error != 0 || req->newptr == NULL) 3062 return (error); 3063 if (enable != 0 && enable != 1) 3064 return (EINVAL); 3065 3066 return (acpi_wake_set_enable(dev, enable)); 3067 } 3068 3069 /* Parse a device's _PRW into a structure. */ 3070 int 3071 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) 3072 { 3073 ACPI_STATUS status; 3074 ACPI_BUFFER prw_buffer; 3075 ACPI_OBJECT *res, *res2; 3076 int error, i, power_count; 3077 3078 if (h == NULL || prw == NULL) 3079 return (EINVAL); 3080 3081 /* 3082 * The _PRW object (7.2.9) is only required for devices that have the 3083 * ability to wake the system from a sleeping state. 3084 */ 3085 error = EINVAL; 3086 prw_buffer.Pointer = NULL; 3087 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 3088 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 3089 if (ACPI_FAILURE(status)) 3090 return (ENOENT); 3091 res = (ACPI_OBJECT *)prw_buffer.Pointer; 3092 if (res == NULL) 3093 return (ENOENT); 3094 if (!ACPI_PKG_VALID(res, 2)) 3095 goto out; 3096 3097 /* 3098 * Element 1 of the _PRW object: 3099 * The lowest power system sleeping state that can be entered while still 3100 * providing wake functionality. The sleeping state being entered must 3101 * be less than (i.e., higher power) or equal to this value. 3102 */ 3103 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) 3104 goto out; 3105 3106 /* 3107 * Element 0 of the _PRW object: 3108 */ 3109 switch (res->Package.Elements[0].Type) { 3110 case ACPI_TYPE_INTEGER: 3111 /* 3112 * If the data type of this package element is numeric, then this 3113 * _PRW package element is the bit index in the GPEx_EN, in the 3114 * GPE blocks described in the FADT, of the enable bit that is 3115 * enabled for the wake event. 3116 */ 3117 prw->gpe_handle = NULL; 3118 prw->gpe_bit = res->Package.Elements[0].Integer.Value; 3119 error = 0; 3120 break; 3121 case ACPI_TYPE_PACKAGE: 3122 /* 3123 * If the data type of this package element is a package, then this 3124 * _PRW package element is itself a package containing two 3125 * elements. The first is an object reference to the GPE Block 3126 * device that contains the GPE that will be triggered by the wake 3127 * event. The second element is numeric and it contains the bit 3128 * index in the GPEx_EN, in the GPE Block referenced by the 3129 * first element in the package, of the enable bit that is enabled for 3130 * the wake event. 3131 * 3132 * For example, if this field is a package then it is of the form: 3133 * Package() {\_SB.PCI0.ISA.GPE, 2} 3134 */ 3135 res2 = &res->Package.Elements[0]; 3136 if (!ACPI_PKG_VALID(res2, 2)) 3137 goto out; 3138 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 3139 if (prw->gpe_handle == NULL) 3140 goto out; 3141 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) 3142 goto out; 3143 error = 0; 3144 break; 3145 default: 3146 goto out; 3147 } 3148 3149 /* Elements 2 to N of the _PRW object are power resources. */ 3150 power_count = res->Package.Count - 2; 3151 if (power_count > ACPI_PRW_MAX_POWERRES) { 3152 printf("ACPI device %s has too many power resources\n", acpi_name(h)); 3153 power_count = 0; 3154 } 3155 prw->power_res_count = power_count; 3156 for (i = 0; i < power_count; i++) 3157 prw->power_res[i] = res->Package.Elements[i]; 3158 3159 out: 3160 if (prw_buffer.Pointer != NULL) 3161 AcpiOsFree(prw_buffer.Pointer); 3162 return (error); 3163 } 3164 3165 /* 3166 * ACPI Event Handlers 3167 */ 3168 3169 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 3170 3171 static void 3172 acpi_system_eventhandler_sleep(void *arg, int state) 3173 { 3174 struct acpi_softc *sc = (struct acpi_softc *)arg; 3175 int ret; 3176 3177 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 3178 3179 /* Check if button action is disabled or unknown. */ 3180 if (state == ACPI_STATE_UNKNOWN) 3181 return; 3182 3183 /* Request that the system prepare to enter the given suspend state. */ 3184 ret = acpi_ReqSleepState(sc, state); 3185 if (ret != 0) 3186 device_printf(sc->acpi_dev, 3187 "request to enter state S%d failed (err %d)\n", state, ret); 3188 3189 return_VOID; 3190 } 3191 3192 static void 3193 acpi_system_eventhandler_wakeup(void *arg, int state) 3194 { 3195 3196 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 3197 3198 /* Currently, nothing to do for wakeup. */ 3199 3200 return_VOID; 3201 } 3202 3203 /* 3204 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 3205 */ 3206 static void 3207 acpi_invoke_sleep_eventhandler(void *context) 3208 { 3209 3210 EVENTHANDLER_INVOKE(acpi_sleep_event, *(int *)context); 3211 } 3212 3213 static void 3214 acpi_invoke_wake_eventhandler(void *context) 3215 { 3216 3217 EVENTHANDLER_INVOKE(acpi_wakeup_event, *(int *)context); 3218 } 3219 3220 UINT32 3221 acpi_event_power_button_sleep(void *context) 3222 { 3223 struct acpi_softc *sc = (struct acpi_softc *)context; 3224 3225 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3226 3227 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3228 acpi_invoke_sleep_eventhandler, &sc->acpi_power_button_sx))) 3229 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3230 return_VALUE (ACPI_INTERRUPT_HANDLED); 3231 } 3232 3233 UINT32 3234 acpi_event_power_button_wake(void *context) 3235 { 3236 struct acpi_softc *sc = (struct acpi_softc *)context; 3237 3238 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3239 3240 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3241 acpi_invoke_wake_eventhandler, &sc->acpi_power_button_sx))) 3242 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3243 return_VALUE (ACPI_INTERRUPT_HANDLED); 3244 } 3245 3246 UINT32 3247 acpi_event_sleep_button_sleep(void *context) 3248 { 3249 struct acpi_softc *sc = (struct acpi_softc *)context; 3250 3251 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3252 3253 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3254 acpi_invoke_sleep_eventhandler, &sc->acpi_sleep_button_sx))) 3255 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3256 return_VALUE (ACPI_INTERRUPT_HANDLED); 3257 } 3258 3259 UINT32 3260 acpi_event_sleep_button_wake(void *context) 3261 { 3262 struct acpi_softc *sc = (struct acpi_softc *)context; 3263 3264 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3265 3266 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3267 acpi_invoke_wake_eventhandler, &sc->acpi_sleep_button_sx))) 3268 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3269 return_VALUE (ACPI_INTERRUPT_HANDLED); 3270 } 3271 3272 /* 3273 * XXX This static buffer is suboptimal. There is no locking so only 3274 * use this for single-threaded callers. 3275 */ 3276 char * 3277 acpi_name(ACPI_HANDLE handle) 3278 { 3279 ACPI_BUFFER buf; 3280 static char data[256]; 3281 3282 buf.Length = sizeof(data); 3283 buf.Pointer = data; 3284 3285 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf))) 3286 return (data); 3287 return ("(unknown)"); 3288 } 3289 3290 /* 3291 * Debugging/bug-avoidance. Avoid trying to fetch info on various 3292 * parts of the namespace. 3293 */ 3294 int 3295 acpi_avoid(ACPI_HANDLE handle) 3296 { 3297 char *cp, *env, *np; 3298 int len; 3299 3300 np = acpi_name(handle); 3301 if (*np == '\\') 3302 np++; 3303 if ((env = getenv("debug.acpi.avoid")) == NULL) 3304 return (0); 3305 3306 /* Scan the avoid list checking for a match */ 3307 cp = env; 3308 for (;;) { 3309 while (*cp != 0 && isspace(*cp)) 3310 cp++; 3311 if (*cp == 0) 3312 break; 3313 len = 0; 3314 while (cp[len] != 0 && !isspace(cp[len])) 3315 len++; 3316 if (!strncmp(cp, np, len)) { 3317 freeenv(env); 3318 return(1); 3319 } 3320 cp += len; 3321 } 3322 freeenv(env); 3323 3324 return (0); 3325 } 3326 3327 /* 3328 * Debugging/bug-avoidance. Disable ACPI subsystem components. 3329 */ 3330 int 3331 acpi_disabled(char *subsys) 3332 { 3333 char *cp, *env; 3334 int len; 3335 3336 if ((env = getenv("debug.acpi.disabled")) == NULL) 3337 return (0); 3338 if (strcmp(env, "all") == 0) { 3339 freeenv(env); 3340 return (1); 3341 } 3342 3343 /* Scan the disable list, checking for a match. */ 3344 cp = env; 3345 for (;;) { 3346 while (*cp != '\0' && isspace(*cp)) 3347 cp++; 3348 if (*cp == '\0') 3349 break; 3350 len = 0; 3351 while (cp[len] != '\0' && !isspace(cp[len])) 3352 len++; 3353 if (strncmp(cp, subsys, len) == 0) { 3354 freeenv(env); 3355 return (1); 3356 } 3357 cp += len; 3358 } 3359 freeenv(env); 3360 3361 return (0); 3362 } 3363 3364 /* 3365 * Control interface. 3366 * 3367 * We multiplex ioctls for all participating ACPI devices here. Individual 3368 * drivers wanting to be accessible via /dev/acpi should use the 3369 * register/deregister interface to make their handlers visible. 3370 */ 3371 struct acpi_ioctl_hook 3372 { 3373 TAILQ_ENTRY(acpi_ioctl_hook) link; 3374 u_long cmd; 3375 acpi_ioctl_fn fn; 3376 void *arg; 3377 }; 3378 3379 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 3380 static int acpi_ioctl_hooks_initted; 3381 3382 int 3383 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 3384 { 3385 struct acpi_ioctl_hook *hp; 3386 3387 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 3388 return (ENOMEM); 3389 hp->cmd = cmd; 3390 hp->fn = fn; 3391 hp->arg = arg; 3392 3393 ACPI_LOCK(acpi); 3394 if (acpi_ioctl_hooks_initted == 0) { 3395 TAILQ_INIT(&acpi_ioctl_hooks); 3396 acpi_ioctl_hooks_initted = 1; 3397 } 3398 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 3399 ACPI_UNLOCK(acpi); 3400 3401 return (0); 3402 } 3403 3404 void 3405 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 3406 { 3407 struct acpi_ioctl_hook *hp; 3408 3409 ACPI_LOCK(acpi); 3410 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 3411 if (hp->cmd == cmd && hp->fn == fn) 3412 break; 3413 3414 if (hp != NULL) { 3415 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 3416 free(hp, M_ACPIDEV); 3417 } 3418 ACPI_UNLOCK(acpi); 3419 } 3420 3421 static int 3422 acpiopen(struct cdev *dev, int flag, int fmt, struct thread *td) 3423 { 3424 return (0); 3425 } 3426 3427 static int 3428 acpiclose(struct cdev *dev, int flag, int fmt, struct thread *td) 3429 { 3430 return (0); 3431 } 3432 3433 static int 3434 acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 3435 { 3436 struct acpi_softc *sc; 3437 struct acpi_ioctl_hook *hp; 3438 int error, state; 3439 3440 error = 0; 3441 hp = NULL; 3442 sc = dev->si_drv1; 3443 3444 /* 3445 * Scan the list of registered ioctls, looking for handlers. 3446 */ 3447 ACPI_LOCK(acpi); 3448 if (acpi_ioctl_hooks_initted) 3449 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 3450 if (hp->cmd == cmd) 3451 break; 3452 } 3453 ACPI_UNLOCK(acpi); 3454 if (hp) 3455 return (hp->fn(cmd, addr, hp->arg)); 3456 3457 /* 3458 * Core ioctls are not permitted for non-writable user. 3459 * Currently, other ioctls just fetch information. 3460 * Not changing system behavior. 3461 */ 3462 if ((flag & FWRITE) == 0) 3463 return (EPERM); 3464 3465 /* Core system ioctls. */ 3466 switch (cmd) { 3467 case ACPIIO_REQSLPSTATE: 3468 state = *(int *)addr; 3469 if (state != ACPI_STATE_S5) 3470 return (acpi_ReqSleepState(sc, state)); 3471 device_printf(sc->acpi_dev, "power off via acpi ioctl not supported\n"); 3472 error = EOPNOTSUPP; 3473 break; 3474 case ACPIIO_ACKSLPSTATE: 3475 error = *(int *)addr; 3476 error = acpi_AckSleepState(sc->acpi_clone, error); 3477 break; 3478 case ACPIIO_SETSLPSTATE: /* DEPRECATED */ 3479 state = *(int *)addr; 3480 if (state < ACPI_STATE_S0 || state > ACPI_S_STATES_MAX) 3481 return (EINVAL); 3482 if (!acpi_sleep_states[state]) 3483 return (EOPNOTSUPP); 3484 if (ACPI_FAILURE(acpi_SetSleepState(sc, state))) 3485 error = ENXIO; 3486 break; 3487 default: 3488 error = ENXIO; 3489 break; 3490 } 3491 3492 return (error); 3493 } 3494 3495 static int 3496 acpi_sname2sstate(const char *sname) 3497 { 3498 int sstate; 3499 3500 if (toupper(sname[0]) == 'S') { 3501 sstate = sname[1] - '0'; 3502 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5 && 3503 sname[2] == '\0') 3504 return (sstate); 3505 } else if (strcasecmp(sname, "NONE") == 0) 3506 return (ACPI_STATE_UNKNOWN); 3507 return (-1); 3508 } 3509 3510 static const char * 3511 acpi_sstate2sname(int sstate) 3512 { 3513 static const char *snames[] = { "S0", "S1", "S2", "S3", "S4", "S5" }; 3514 3515 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5) 3516 return (snames[sstate]); 3517 else if (sstate == ACPI_STATE_UNKNOWN) 3518 return ("NONE"); 3519 return (NULL); 3520 } 3521 3522 static int 3523 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3524 { 3525 int error; 3526 struct sbuf sb; 3527 UINT8 state; 3528 3529 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND); 3530 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++) 3531 if (acpi_sleep_states[state]) 3532 sbuf_printf(&sb, "%s ", acpi_sstate2sname(state)); 3533 sbuf_trim(&sb); 3534 sbuf_finish(&sb); 3535 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 3536 sbuf_delete(&sb); 3537 return (error); 3538 } 3539 3540 static int 3541 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3542 { 3543 char sleep_state[10]; 3544 int error, new_state, old_state; 3545 3546 old_state = *(int *)oidp->oid_arg1; 3547 strlcpy(sleep_state, acpi_sstate2sname(old_state), sizeof(sleep_state)); 3548 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 3549 if (error == 0 && req->newptr != NULL) { 3550 new_state = acpi_sname2sstate(sleep_state); 3551 if (new_state < ACPI_STATE_S1) 3552 return (EINVAL); 3553 if (new_state < ACPI_S_STATE_COUNT && !acpi_sleep_states[new_state]) 3554 return (EOPNOTSUPP); 3555 if (new_state != old_state) 3556 *(int *)oidp->oid_arg1 = new_state; 3557 } 3558 return (error); 3559 } 3560 3561 /* Inform devctl(4) when we receive a Notify. */ 3562 void 3563 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 3564 { 3565 char notify_buf[16]; 3566 ACPI_BUFFER handle_buf; 3567 ACPI_STATUS status; 3568 3569 if (subsystem == NULL) 3570 return; 3571 3572 handle_buf.Pointer = NULL; 3573 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 3574 status = AcpiNsHandleToPathname(h, &handle_buf); 3575 if (ACPI_FAILURE(status)) 3576 return; 3577 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 3578 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 3579 AcpiOsFree(handle_buf.Pointer); 3580 } 3581 3582 #ifdef ACPI_DEBUG 3583 /* 3584 * Support for parsing debug options from the kernel environment. 3585 * 3586 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 3587 * by specifying the names of the bits in the debug.acpi.layer and 3588 * debug.acpi.level environment variables. Bits may be unset by 3589 * prefixing the bit name with !. 3590 */ 3591 struct debugtag 3592 { 3593 char *name; 3594 UINT32 value; 3595 }; 3596 3597 static struct debugtag dbg_layer[] = { 3598 {"ACPI_UTILITIES", ACPI_UTILITIES}, 3599 {"ACPI_HARDWARE", ACPI_HARDWARE}, 3600 {"ACPI_EVENTS", ACPI_EVENTS}, 3601 {"ACPI_TABLES", ACPI_TABLES}, 3602 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 3603 {"ACPI_PARSER", ACPI_PARSER}, 3604 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 3605 {"ACPI_EXECUTER", ACPI_EXECUTER}, 3606 {"ACPI_RESOURCES", ACPI_RESOURCES}, 3607 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 3608 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 3609 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 3610 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 3611 3612 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 3613 {"ACPI_BATTERY", ACPI_BATTERY}, 3614 {"ACPI_BUS", ACPI_BUS}, 3615 {"ACPI_BUTTON", ACPI_BUTTON}, 3616 {"ACPI_EC", ACPI_EC}, 3617 {"ACPI_FAN", ACPI_FAN}, 3618 {"ACPI_POWERRES", ACPI_POWERRES}, 3619 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 3620 {"ACPI_THERMAL", ACPI_THERMAL}, 3621 {"ACPI_TIMER", ACPI_TIMER}, 3622 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 3623 {NULL, 0} 3624 }; 3625 3626 static struct debugtag dbg_level[] = { 3627 {"ACPI_LV_INIT", ACPI_LV_INIT}, 3628 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 3629 {"ACPI_LV_INFO", ACPI_LV_INFO}, 3630 {"ACPI_LV_REPAIR", ACPI_LV_REPAIR}, 3631 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 3632 3633 /* Trace verbosity level 1 [Standard Trace Level] */ 3634 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 3635 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 3636 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 3637 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 3638 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 3639 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 3640 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 3641 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 3642 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 3643 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 3644 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 3645 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 3646 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 3647 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 3648 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 3649 3650 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 3651 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 3652 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 3653 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 3654 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 3655 {"ACPI_LV_ALL", ACPI_LV_ALL}, 3656 3657 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 3658 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 3659 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 3660 {"ACPI_LV_IO", ACPI_LV_IO}, 3661 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 3662 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 3663 3664 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 3665 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 3666 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 3667 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 3668 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 3669 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 3670 {NULL, 0} 3671 }; 3672 3673 static void 3674 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 3675 { 3676 char *ep; 3677 int i, l; 3678 int set; 3679 3680 while (*cp) { 3681 if (isspace(*cp)) { 3682 cp++; 3683 continue; 3684 } 3685 ep = cp; 3686 while (*ep && !isspace(*ep)) 3687 ep++; 3688 if (*cp == '!') { 3689 set = 0; 3690 cp++; 3691 if (cp == ep) 3692 continue; 3693 } else { 3694 set = 1; 3695 } 3696 l = ep - cp; 3697 for (i = 0; tag[i].name != NULL; i++) { 3698 if (!strncmp(cp, tag[i].name, l)) { 3699 if (set) 3700 *flag |= tag[i].value; 3701 else 3702 *flag &= ~tag[i].value; 3703 } 3704 } 3705 cp = ep; 3706 } 3707 } 3708 3709 static void 3710 acpi_set_debugging(void *junk) 3711 { 3712 char *layer, *level; 3713 3714 if (cold) { 3715 AcpiDbgLayer = 0; 3716 AcpiDbgLevel = 0; 3717 } 3718 3719 layer = getenv("debug.acpi.layer"); 3720 level = getenv("debug.acpi.level"); 3721 if (layer == NULL && level == NULL) 3722 return; 3723 3724 printf("ACPI set debug"); 3725 if (layer != NULL) { 3726 if (strcmp("NONE", layer) != 0) 3727 printf(" layer '%s'", layer); 3728 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer); 3729 freeenv(layer); 3730 } 3731 if (level != NULL) { 3732 if (strcmp("NONE", level) != 0) 3733 printf(" level '%s'", level); 3734 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel); 3735 freeenv(level); 3736 } 3737 printf("\n"); 3738 } 3739 3740 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 3741 NULL); 3742 3743 static int 3744 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 3745 { 3746 int error, *dbg; 3747 struct debugtag *tag; 3748 struct sbuf sb; 3749 3750 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 3751 return (ENOMEM); 3752 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 3753 tag = &dbg_layer[0]; 3754 dbg = &AcpiDbgLayer; 3755 } else { 3756 tag = &dbg_level[0]; 3757 dbg = &AcpiDbgLevel; 3758 } 3759 3760 /* Get old values if this is a get request. */ 3761 ACPI_SERIAL_BEGIN(acpi); 3762 if (*dbg == 0) { 3763 sbuf_cpy(&sb, "NONE"); 3764 } else if (req->newptr == NULL) { 3765 for (; tag->name != NULL; tag++) { 3766 if ((*dbg & tag->value) == tag->value) 3767 sbuf_printf(&sb, "%s ", tag->name); 3768 } 3769 } 3770 sbuf_trim(&sb); 3771 sbuf_finish(&sb); 3772 3773 /* Copy out the old values to the user. */ 3774 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb)); 3775 sbuf_delete(&sb); 3776 3777 /* If the user is setting a string, parse it. */ 3778 if (error == 0 && req->newptr != NULL) { 3779 *dbg = 0; 3780 setenv((char *)oidp->oid_arg1, (char *)req->newptr); 3781 acpi_set_debugging(NULL); 3782 } 3783 ACPI_SERIAL_END(acpi); 3784 3785 return (error); 3786 } 3787 3788 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 3789 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 3790 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 3791 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 3792 #endif /* ACPI_DEBUG */ 3793 3794 static int 3795 acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS) 3796 { 3797 int error; 3798 int old; 3799 3800 old = acpi_debug_objects; 3801 error = sysctl_handle_int(oidp, &acpi_debug_objects, 0, req); 3802 if (error != 0 || req->newptr == NULL) 3803 return (error); 3804 if (old == acpi_debug_objects || (old && acpi_debug_objects)) 3805 return (0); 3806 3807 ACPI_SERIAL_BEGIN(acpi); 3808 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE; 3809 ACPI_SERIAL_END(acpi); 3810 3811 return (0); 3812 } 3813 3814 static int 3815 acpi_parse_interfaces(char *str, struct acpi_interface *iface) 3816 { 3817 char *p; 3818 size_t len; 3819 int i, j; 3820 3821 p = str; 3822 while (isspace(*p) || *p == ',') 3823 p++; 3824 len = strlen(p); 3825 if (len == 0) 3826 return (0); 3827 p = strdup(p, M_TEMP); 3828 for (i = 0; i < len; i++) 3829 if (p[i] == ',') 3830 p[i] = '\0'; 3831 i = j = 0; 3832 while (i < len) 3833 if (isspace(p[i]) || p[i] == '\0') 3834 i++; 3835 else { 3836 i += strlen(p + i) + 1; 3837 j++; 3838 } 3839 if (j == 0) { 3840 free(p, M_TEMP); 3841 return (0); 3842 } 3843 iface->data = malloc(sizeof(*iface->data) * j, M_TEMP, M_WAITOK); 3844 iface->num = j; 3845 i = j = 0; 3846 while (i < len) 3847 if (isspace(p[i]) || p[i] == '\0') 3848 i++; 3849 else { 3850 iface->data[j] = p + i; 3851 i += strlen(p + i) + 1; 3852 j++; 3853 } 3854 3855 return (j); 3856 } 3857 3858 static void 3859 acpi_free_interfaces(struct acpi_interface *iface) 3860 { 3861 3862 free(iface->data[0], M_TEMP); 3863 free(iface->data, M_TEMP); 3864 } 3865 3866 static void 3867 acpi_reset_interfaces(device_t dev) 3868 { 3869 struct acpi_interface list; 3870 ACPI_STATUS status; 3871 int i; 3872 3873 if (acpi_parse_interfaces(acpi_install_interface, &list) > 0) { 3874 for (i = 0; i < list.num; i++) { 3875 status = AcpiInstallInterface(list.data[i]); 3876 if (ACPI_FAILURE(status)) 3877 device_printf(dev, 3878 "failed to install _OSI(\"%s\"): %s\n", 3879 list.data[i], AcpiFormatException(status)); 3880 else if (bootverbose) 3881 device_printf(dev, "installed _OSI(\"%s\")\n", 3882 list.data[i]); 3883 } 3884 acpi_free_interfaces(&list); 3885 } 3886 if (acpi_parse_interfaces(acpi_remove_interface, &list) > 0) { 3887 for (i = 0; i < list.num; i++) { 3888 status = AcpiRemoveInterface(list.data[i]); 3889 if (ACPI_FAILURE(status)) 3890 device_printf(dev, 3891 "failed to remove _OSI(\"%s\"): %s\n", 3892 list.data[i], AcpiFormatException(status)); 3893 else if (bootverbose) 3894 device_printf(dev, "removed _OSI(\"%s\")\n", 3895 list.data[i]); 3896 } 3897 acpi_free_interfaces(&list); 3898 } 3899 } 3900 3901 static int 3902 acpi_pm_func(u_long cmd, void *arg, ...) 3903 { 3904 int state, acpi_state; 3905 int error; 3906 struct acpi_softc *sc; 3907 va_list ap; 3908 3909 error = 0; 3910 switch (cmd) { 3911 case POWER_CMD_SUSPEND: 3912 sc = (struct acpi_softc *)arg; 3913 if (sc == NULL) { 3914 error = EINVAL; 3915 goto out; 3916 } 3917 3918 va_start(ap, arg); 3919 state = va_arg(ap, int); 3920 va_end(ap); 3921 3922 switch (state) { 3923 case POWER_SLEEP_STATE_STANDBY: 3924 acpi_state = sc->acpi_standby_sx; 3925 break; 3926 case POWER_SLEEP_STATE_SUSPEND: 3927 acpi_state = sc->acpi_suspend_sx; 3928 break; 3929 case POWER_SLEEP_STATE_HIBERNATE: 3930 acpi_state = ACPI_STATE_S4; 3931 break; 3932 default: 3933 error = EINVAL; 3934 goto out; 3935 } 3936 3937 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state))) 3938 error = ENXIO; 3939 break; 3940 default: 3941 error = EINVAL; 3942 goto out; 3943 } 3944 3945 out: 3946 return (error); 3947 } 3948 3949 static void 3950 acpi_pm_register(void *arg) 3951 { 3952 if (!cold || resource_disabled("acpi", 0)) 3953 return; 3954 3955 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 3956 } 3957 3958 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 3959