1 /*- 2 * Copyright (c) 2000 Takanori Watanabe <takawata@jp.kfreebsd.org> 3 * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.kfreebsd.org> 4 * Copyright (c) 2000, 2001 Michael Smith 5 * Copyright (c) 2000 BSDi 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: src/sys/dev/acpica/acpi.c,v 1.243.2.4.4.1 2009/04/15 03:14:26 kensmith Exp $ 30 */ 31 32 #include "opt_acpi.h" 33 #include <sys/param.h> 34 #include <sys/kernel.h> 35 #include <sys/proc.h> 36 #include <sys/fcntl.h> 37 #include <sys/malloc.h> 38 #include <sys/module.h> 39 #include <sys/bus.h> 40 #include <sys/conf.h> 41 #include <sys/reboot.h> 42 #include <sys/sysctl.h> 43 #include <sys/ctype.h> 44 #include <sys/linker.h> 45 #include <sys/power.h> 46 #include <sys/sbuf.h> 47 #include <sys/device.h> 48 #include <sys/spinlock.h> 49 #include <sys/spinlock2.h> 50 #include <sys/uuid.h> 51 52 #include <sys/rman.h> 53 #include <bus/isa/isavar.h> 54 #include <bus/isa/pnpvar.h> 55 56 #include "acpi.h" 57 #include <dev/acpica/acpivar.h> 58 #include <dev/acpica/acpiio.h> 59 #include <dev/acpica/acpiio_mcall.h> 60 #include "achware.h" 61 #include "acnamesp.h" 62 #include "acglobal.h" 63 64 #include "pci_if.h" 65 #include <bus/pci/pci_cfgreg.h> 66 #include <bus/pci/pcivar.h> 67 #include <bus/pci/pci_private.h> 68 69 #include <vm/vm_param.h> 70 71 MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 72 73 /* Hooks for the ACPICA 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 dev_ops acpi_ops = { 82 { "acpi", 0, 0 }, 83 .d_open = acpiopen, 84 .d_close = acpiclose, 85 .d_ioctl = acpiioctl 86 }; 87 88 struct acpi_interface { 89 ACPI_STRING *data; 90 int num; 91 }; 92 93 /* Global mutex for locking access to the ACPI subsystem. */ 94 struct lock acpi_lock; 95 96 /* Bitmap of device quirks. */ 97 int acpi_quirks; 98 99 static int acpi_modevent(struct module *mod, int event, void *junk); 100 static void acpi_identify(driver_t *driver, device_t parent); 101 static int acpi_probe(device_t dev); 102 static int acpi_attach(device_t dev); 103 static int acpi_suspend(device_t dev); 104 static int acpi_resume(device_t dev); 105 static int acpi_shutdown(device_t dev); 106 static device_t acpi_add_child(device_t bus, device_t parent, int order, const char *name, 107 int unit); 108 static int acpi_print_child(device_t bus, device_t child); 109 static void acpi_probe_nomatch(device_t bus, device_t child); 110 static void acpi_driver_added(device_t dev, driver_t *driver); 111 static int acpi_read_ivar(device_t dev, device_t child, int index, 112 uintptr_t *result); 113 static int acpi_write_ivar(device_t dev, device_t child, int index, 114 uintptr_t value); 115 static struct resource_list *acpi_get_rlist(device_t dev, device_t child); 116 static int acpi_sysres_alloc(device_t dev); 117 static struct resource *acpi_alloc_resource(device_t bus, device_t child, 118 int type, int *rid, u_long start, u_long end, 119 u_long count, u_int flags, int cpuid); 120 static int acpi_release_resource(device_t bus, device_t child, int type, 121 int rid, struct resource *r); 122 static void acpi_delete_resource(device_t bus, device_t child, int type, 123 int rid); 124 static uint32_t acpi_isa_get_logicalid(device_t dev); 125 static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count); 126 static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids); 127 static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev, 128 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters, 129 ACPI_BUFFER *ret); 130 static int acpi_device_pwr_for_sleep(device_t bus, device_t dev, 131 int *dstate); 132 static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, 133 void *context, void **retval); 134 static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev, 135 int max_depth, acpi_scan_cb_t user_fn, void *arg); 136 static int acpi_set_powerstate_method(device_t bus, device_t child, 137 int state); 138 static int acpi_isa_pnp_probe(device_t bus, device_t child, 139 struct isa_pnp_id *ids); 140 static void acpi_probe_children(device_t bus); 141 static void acpi_probe_order(ACPI_HANDLE handle, int *order); 142 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, 143 void *context, void **status); 144 static ACPI_STATUS acpi_EnterSleepState(struct acpi_softc *sc, int state); 145 static void acpi_shutdown_final(void *arg, int howto); 146 static void acpi_enable_fixed_events(struct acpi_softc *sc); 147 static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate); 148 static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate); 149 static int acpi_wake_prep_walk(int sstate); 150 static int acpi_wake_sysctl_walk(device_t dev); 151 #ifdef notyet 152 static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS); 153 #endif 154 static void acpi_system_eventhandler_sleep(void *arg, int state); 155 static void acpi_system_eventhandler_wakeup(void *arg, int state); 156 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 157 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 158 static int acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS); 159 static int acpi_pm_func(u_long cmd, void *arg, ...); 160 static int acpi_child_location_str_method(device_t acdev, device_t child, 161 char *buf, size_t buflen); 162 static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child, 163 char *buf, size_t buflen); 164 static void acpi_enable_pcie(void); 165 static void acpi_reset_interfaces(device_t dev); 166 167 static device_method_t acpi_methods[] = { 168 /* Device interface */ 169 DEVMETHOD(device_identify, acpi_identify), 170 DEVMETHOD(device_probe, acpi_probe), 171 DEVMETHOD(device_attach, acpi_attach), 172 DEVMETHOD(device_shutdown, acpi_shutdown), 173 DEVMETHOD(device_detach, bus_generic_detach), 174 DEVMETHOD(device_suspend, acpi_suspend), 175 DEVMETHOD(device_resume, acpi_resume), 176 177 /* Bus interface */ 178 DEVMETHOD(bus_add_child, acpi_add_child), 179 DEVMETHOD(bus_print_child, acpi_print_child), 180 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch), 181 DEVMETHOD(bus_driver_added, acpi_driver_added), 182 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 183 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 184 DEVMETHOD(bus_get_resource_list, acpi_get_rlist), 185 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 186 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 187 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 188 DEVMETHOD(bus_release_resource, acpi_release_resource), 189 DEVMETHOD(bus_delete_resource, acpi_delete_resource), 190 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method), 191 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method), 192 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 193 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 194 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 195 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 196 197 /* ACPI bus */ 198 DEVMETHOD(acpi_id_probe, acpi_device_id_probe), 199 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj), 200 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep), 201 DEVMETHOD(acpi_scan_children, acpi_device_scan_children), 202 203 /* PCI emulation */ 204 DEVMETHOD(pci_set_powerstate, acpi_set_powerstate_method), 205 206 /* ISA emulation */ 207 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 208 209 DEVMETHOD_END 210 }; 211 212 static driver_t acpi_driver = { 213 "acpi", 214 acpi_methods, 215 sizeof(struct acpi_softc), 216 }; 217 218 static devclass_t acpi_devclass; 219 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, NULL); 220 MODULE_VERSION(acpi, 1); 221 222 ACPI_SERIAL_DECL(acpi, "ACPI serializer"); 223 224 /* Local pools for managing system resources for ACPI child devices. */ 225 static struct rman acpi_rman_io, acpi_rman_mem; 226 227 #define ACPI_MINIMUM_AWAKETIME 5 228 229 static const char* sleep_state_names[] = { 230 "S0", "S1", "S2", "S3", "S4", "S5", "NONE"}; 231 232 SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging"); 233 static char acpi_ca_version[12]; 234 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, 235 acpi_ca_version, 0, "Version of Intel ACPICA"); 236 237 /* 238 * Allow overriding _OSI methods. 239 */ 240 static char acpi_install_interface[256]; 241 TUNABLE_STR("hw.acpi.install_interface", acpi_install_interface, 242 sizeof(acpi_install_interface)); 243 static char acpi_remove_interface[256]; 244 TUNABLE_STR("hw.acpi.remove_interface", acpi_remove_interface, 245 sizeof(acpi_remove_interface)); 246 247 /* 248 * Use this tunable to disable the control method auto-serialization 249 * mechanism that was added in 20140214 and superseded the previous 250 * AcpiGbl_SerializeAllMethods global. 251 */ 252 static int acpi_auto_serialize_methods = 1; 253 TUNABLE_INT("hw.acpi.auto_serialize_methods", &acpi_auto_serialize_methods); 254 255 /* Allow users to dump Debug objects without ACPI debugger. */ 256 static int acpi_debug_objects; 257 TUNABLE_INT("debug.acpi.enable_debug_objects", &acpi_debug_objects); 258 SYSCTL_PROC(_debug_acpi, OID_AUTO, enable_debug_objects, 259 CTLFLAG_RW | CTLTYPE_INT, NULL, 0, acpi_debug_objects_sysctl, "I", 260 "Enable Debug objects."); 261 262 /* Allow ignoring the XSDT. */ 263 static int acpi_ignore_xsdt; 264 TUNABLE_INT("debug.acpi.ignore_xsdt", &acpi_ignore_xsdt); 265 SYSCTL_INT(_debug_acpi, OID_AUTO, ignore_xsdt, CTLFLAG_RD, 266 &acpi_ignore_xsdt, 1, "Ignore the XSDT, forcing the use of the RSDT."); 267 268 /* Allow the interpreter to ignore common mistakes in BIOS. */ 269 static int acpi_interpreter_slack = 1; 270 TUNABLE_INT("debug.acpi.interpreter_slack", &acpi_interpreter_slack); 271 SYSCTL_INT(_debug_acpi, OID_AUTO, interpreter_slack, CTLFLAG_RD, 272 &acpi_interpreter_slack, 1, "Turn on interpreter slack mode."); 273 274 /* Allow preferring 32-bit FADT register addresses over the 64-bit ones. */ 275 static int acpi_fadt_addr32; 276 TUNABLE_INT("debug.acpi.fadt_addr32", &acpi_fadt_addr32); 277 SYSCTL_INT(_debug_acpi, OID_AUTO, fadt_addr32, CTLFLAG_RD, 278 &acpi_fadt_addr32, 1, 279 "Prefer 32-bit FADT register addresses over 64-bit ones."); 280 281 /* Prefer 32-bit FACS table addresses over the 64-bit ones. */ 282 static int acpi_facs_addr32 = 1; 283 TUNABLE_INT("debug.acpi.facs_addr32", &acpi_facs_addr32); 284 SYSCTL_INT(_debug_acpi, OID_AUTO, facs_addr32, CTLFLAG_RD, 285 &acpi_facs_addr32, 1, 286 "Prefer 32-bit FACS table addresses over 64-bit ones."); 287 288 static int acpi_group_module_level_code; 289 TUNABLE_INT("debug.acpi.group_module_level_code", &acpi_group_module_level_code); 290 SYSCTL_INT(_debug_acpi, OID_AUTO, group_module_level_code, CTLFLAG_RD, 291 &acpi_group_module_level_code, 1, 292 "Group module-level code."); 293 294 /* Power devices off and on in suspend and resume. XXX Remove once tested. */ 295 static int acpi_do_powerstate = 1; 296 TUNABLE_INT("debug.acpi.do_powerstate", &acpi_do_powerstate); 297 SYSCTL_INT(_debug_acpi, OID_AUTO, do_powerstate, CTLFLAG_RW, 298 &acpi_do_powerstate, 1, "Turn off devices when suspending."); 299 300 /* Allow users to override quirks. */ 301 TUNABLE_INT("debug.acpi.quirks", &acpi_quirks); 302 303 /* Allow to call ACPI methods from userland. */ 304 static int acpi_allow_mcall; 305 TUNABLE_INT("debug.acpi.allow_method_calls", &acpi_allow_mcall); 306 307 static int acpi_susp_bounce; 308 SYSCTL_INT(_debug_acpi, OID_AUTO, suspend_bounce, CTLFLAG_RW, 309 &acpi_susp_bounce, 0, "Don't actually suspend, just test devices."); 310 311 /* 312 * ACPI can only be loaded as a module by the loader; activating it after 313 * system bootstrap time is not useful, and can be fatal to the system. 314 * It also cannot be unloaded, since the entire system bus heirarchy hangs 315 * off it. 316 */ 317 static int 318 acpi_modevent(struct module *mod, int event, void *junk) 319 { 320 switch (event) { 321 case MOD_LOAD: 322 if (!cold) { 323 kprintf("The ACPI driver cannot be loaded after boot.\n"); 324 return (EPERM); 325 } 326 break; 327 case MOD_UNLOAD: 328 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 329 return (EBUSY); 330 break; 331 default: 332 break; 333 } 334 return (0); 335 } 336 337 /* 338 * Perform early initialization. 339 */ 340 ACPI_STATUS 341 acpi_Startup(void) 342 { 343 static int started = 0; 344 ACPI_STATUS status; 345 int val; 346 347 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 348 349 /* Only run the startup code once. The MADT driver also calls this. */ 350 if (started) 351 return_VALUE (AE_OK); 352 started = 1; 353 354 /* 355 * Pre-allocate space for RSDT/XSDT and DSDT tables and allow resizing 356 * if more tables exist. 357 */ 358 if (ACPI_FAILURE(status = AcpiInitializeTables(NULL, 2, TRUE))) { 359 kprintf("ACPI: Table initialisation failed: %s\n", 360 AcpiFormatException(status)); 361 return_VALUE (status); 362 } 363 364 /* Set up any quirks we have for this system. */ 365 if (acpi_quirks == ACPI_Q_OK) 366 acpi_table_quirks(&acpi_quirks); 367 368 /* If the user manually set the disabled hint to 0, force-enable ACPI. */ 369 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0) 370 acpi_quirks &= ~ACPI_Q_BROKEN; 371 if (acpi_quirks & ACPI_Q_BROKEN) { 372 kprintf("ACPI disabled by blacklist. Contact your BIOS vendor.\n"); 373 status = AE_SUPPORT; 374 } 375 376 return_VALUE (status); 377 } 378 379 /* 380 * Detect ACPI, perform early initialisation 381 */ 382 static void 383 acpi_identify(driver_t *driver, device_t parent) 384 { 385 device_t child; 386 387 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 388 389 if (!cold) 390 return_VOID; 391 392 /* Check that we haven't been disabled with a hint. */ 393 if (resource_disabled("acpi", 0)) 394 return_VOID; 395 396 /* Make sure we're not being doubly invoked. */ 397 if (device_find_child(parent, "acpi", 0) != NULL) 398 return_VOID; 399 400 ksnprintf(acpi_ca_version, sizeof(acpi_ca_version), "%x", ACPI_CA_VERSION); 401 402 /* Initialize root tables. */ 403 if (ACPI_FAILURE(acpi_Startup())) { 404 kprintf("ACPI: Try disabling either ACPI or apic support.\n"); 405 return_VOID; 406 } 407 408 /* Attach the actual ACPI device. */ 409 if ((child = BUS_ADD_CHILD(parent, parent, 10, "acpi", 0)) == NULL) { 410 device_printf(parent, "device_identify failed\n"); 411 return_VOID; 412 } 413 } 414 415 /* 416 * Fetch some descriptive data from ACPI to put in our attach message. 417 */ 418 static int 419 acpi_probe(device_t dev) 420 { 421 ACPI_TABLE_RSDP *rsdp; 422 ACPI_TABLE_HEADER *rsdt; 423 ACPI_PHYSICAL_ADDRESS paddr; 424 char buf[ACPI_OEM_ID_SIZE + ACPI_OEM_TABLE_ID_SIZE + 2]; 425 struct sbuf sb; 426 427 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 428 429 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 430 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 431 device_printf(dev, "probe failed, other PM system enabled.\n"); 432 return_VALUE (ENXIO); 433 } 434 435 if ((paddr = AcpiOsGetRootPointer()) == 0 || 436 (rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP))) == NULL) 437 return_VALUE (ENXIO); 438 if (acpi_ignore_xsdt == 0 && 439 rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress != 0) 440 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress; 441 else 442 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress; 443 AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP)); 444 445 if ((rsdt = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER))) == NULL) 446 return_VALUE (ENXIO); 447 sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN); 448 sbuf_bcat(&sb, rsdt->OemId, ACPI_OEM_ID_SIZE); 449 sbuf_trim(&sb); 450 sbuf_putc(&sb, ' '); 451 sbuf_bcat(&sb, rsdt->OemTableId, ACPI_OEM_TABLE_ID_SIZE); 452 sbuf_trim(&sb); 453 sbuf_finish(&sb); 454 device_set_desc_copy(dev, sbuf_data(&sb)); 455 sbuf_delete(&sb); 456 AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER)); 457 458 return_VALUE (0); 459 } 460 461 static int 462 acpi_attach(device_t dev) 463 { 464 struct acpi_softc *sc; 465 ACPI_STATUS status; 466 int error, state; 467 UINT32 flags; 468 UINT8 TypeA, TypeB; 469 char *env; 470 471 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 472 473 sc = device_get_softc(dev); 474 sc->acpi_dev = dev; 475 callout_init(&sc->susp_force_to); 476 477 if ((error = acpi_task_thread_init())) { 478 device_printf(dev, "Could not start task thread.\n"); 479 goto out; 480 } 481 482 error = ENXIO; 483 484 /* Initialize resource manager. */ 485 acpi_rman_io.rm_type = RMAN_ARRAY; 486 acpi_rman_io.rm_start = 0; 487 acpi_rman_io.rm_end = 0xffff; 488 acpi_rman_io.rm_descr = "ACPI I/O ports"; 489 if (rman_init(&acpi_rman_io, -1) != 0) 490 panic("acpi rman_init IO ports failed"); 491 acpi_rman_mem.rm_type = RMAN_ARRAY; 492 acpi_rman_mem.rm_start = 0; 493 acpi_rman_mem.rm_end = ~0ul; 494 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses"; 495 if (rman_init(&acpi_rman_mem, -1) != 0) 496 panic("acpi rman_init memory failed"); 497 498 /* Initialise the ACPI mutex */ 499 ACPI_LOCK_INIT(acpi, "acpi"); 500 ACPI_SERIAL_INIT(acpi); 501 502 /* 503 * Set the globals from our tunables. This is needed because ACPICA 504 * uses UINT8 for some values and we have no tunable_byte. 505 */ 506 AcpiGbl_AutoSerializeMethods = acpi_auto_serialize_methods ? TRUE : FALSE; 507 AcpiGbl_DoNotUseXsdt = acpi_ignore_xsdt ? TRUE : FALSE; 508 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE; 509 AcpiGbl_EnableInterpreterSlack = acpi_interpreter_slack ? TRUE : FALSE; 510 AcpiGbl_GroupModuleLevelCode = acpi_group_module_level_code ? TRUE : FALSE; 511 AcpiGbl_Use32BitFadtAddresses = acpi_fadt_addr32 ? TRUE : FALSE; 512 AcpiGbl_Use32BitFacsAddresses = acpi_facs_addr32 ? TRUE : FALSE; 513 514 #ifndef ACPI_DEBUG 515 /* 516 * Disable Debug Object output. 517 */ 518 AcpiDbgLevel &= ~ACPI_LV_DEBUG_OBJECT; 519 #endif 520 521 /* Start up the ACPICA subsystem. */ 522 status = AcpiInitializeSubsystem(); 523 if (ACPI_FAILURE(status)) { 524 device_printf(dev, "Could not initialize Subsystem: %s\n", 525 AcpiFormatException(status)); 526 goto out; 527 } 528 529 /* Override OS interfaces if the user requested. */ 530 acpi_reset_interfaces(dev); 531 532 /* Load ACPI name space. */ 533 status = AcpiLoadTables(); 534 if (ACPI_FAILURE(status)) { 535 device_printf(dev, "Could not load Namespace: %s\n", 536 AcpiFormatException(status)); 537 goto out; 538 } 539 540 /* Handle MCFG table if present. */ 541 acpi_enable_pcie(); 542 543 /* 544 * Note that some systems (specifically, those with namespace evaluation 545 * issues that require the avoidance of parts of the namespace) must 546 * avoid running _INI and _STA on everything, as well as dodging the final 547 * object init pass. 548 * 549 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 550 * 551 * XXX We should arrange for the object init pass after we have attached 552 * all our child devices, but on many systems it works here. 553 */ 554 flags = ACPI_FULL_INITIALIZATION; 555 if (ktestenv("debug.acpi.avoid")) 556 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 557 558 /* Bring the hardware and basic handlers online. */ 559 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 560 device_printf(dev, "Could not enable ACPI: %s\n", 561 AcpiFormatException(status)); 562 goto out; 563 } 564 565 /* 566 * Fix up the interrupt timer after enabling ACPI, so that the 567 * interrupt cputimer that choked by ACPI power management could 568 * be resurrected before probing various devices. 569 */ 570 DELAY(5000); 571 cputimer_intr_pmfixup(); 572 573 /* 574 * Call the ECDT probe function to provide EC functionality before 575 * the namespace has been evaluated. 576 * 577 * XXX This happens before the sysresource devices have been probed and 578 * attached so its resources come from nexus0. In practice, this isn't 579 * a problem but should be addressed eventually. 580 */ 581 acpi_ec_ecdt_probe(dev); 582 583 /* Bring device objects and regions online. */ 584 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 585 device_printf(dev, "Could not initialize ACPI objects: %s\n", 586 AcpiFormatException(status)); 587 goto out; 588 } 589 590 /* 591 * Setup our sysctl tree. 592 * 593 * XXX: This doesn't check to make sure that none of these fail. 594 */ 595 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 596 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 597 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 598 device_get_name(dev), CTLFLAG_RD, 0, ""); 599 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 600 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 601 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 602 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 603 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 604 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 605 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 606 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 607 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 608 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 609 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 610 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 611 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 612 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 613 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 614 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 615 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 616 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 617 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 618 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0, 619 "sleep delay"); 620 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 621 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode"); 622 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 623 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode"); 624 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 625 OID_AUTO, "disable_on_reboot", CTLFLAG_RW, 626 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system"); 627 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 628 OID_AUTO, "handle_reboot", CTLFLAG_RW, 629 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot"); 630 631 /* 632 * Default to 1 second before sleeping to give some machines time to 633 * stabilize. 634 */ 635 sc->acpi_sleep_delay = 1; 636 if (bootverbose) 637 sc->acpi_verbose = 1; 638 if ((env = kgetenv("hw.acpi.verbose")) != NULL) { 639 if (strcmp(env, "0") != 0) 640 sc->acpi_verbose = 1; 641 kfreeenv(env); 642 } 643 644 /* Only enable reboot by default if the FADT says it is available. */ 645 if (AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) 646 sc->acpi_handle_reboot = 1; 647 648 /* Only enable S4BIOS by default if the FACS says it is available. */ 649 if (AcpiGbl_FACS->Flags & ACPI_FACS_S4_BIOS_PRESENT) 650 sc->acpi_s4bios = 1; 651 652 /* 653 * Dispatch the default sleep state to devices. The lid switch is set 654 * to NONE by default to avoid surprising users. 655 */ 656 sc->acpi_power_button_sx = ACPI_STATE_S5; 657 sc->acpi_lid_switch_sx = ACPI_S_STATES_MAX + 1; 658 sc->acpi_standby_sx = ACPI_STATE_S1; 659 sc->acpi_suspend_sx = ACPI_STATE_S3; 660 661 /* Pick the first valid sleep state for the sleep button default. */ 662 sc->acpi_sleep_button_sx = ACPI_S_STATES_MAX + 1; 663 for (state = ACPI_STATE_S1; state <= ACPI_STATE_S4; state++) 664 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) { 665 sc->acpi_sleep_button_sx = state; 666 break; 667 } 668 669 acpi_enable_fixed_events(sc); 670 671 /* 672 * Scan the namespace and attach/initialise children. 673 */ 674 675 /* Register our shutdown handler. */ 676 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 677 SHUTDOWN_PRI_LAST); 678 679 /* 680 * Register our acpi event handlers. 681 * XXX should be configurable eg. via userland policy manager. 682 */ 683 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 684 sc, ACPI_EVENT_PRI_LAST); 685 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 686 sc, ACPI_EVENT_PRI_LAST); 687 688 /* Flag our initial states. */ 689 sc->acpi_enabled = 1; 690 sc->acpi_sstate = ACPI_STATE_S0; 691 sc->acpi_sleep_disabled = 0; 692 /* Create the control device */ 693 sc->acpi_dev_t = make_dev(&acpi_ops, 0, UID_ROOT, GID_WHEEL, 0644, "acpi"); 694 sc->acpi_dev_t->si_drv1 = sc; 695 696 if ((error = acpi_machdep_init(dev))) 697 goto out; 698 699 /* Register ACPI again to pass the correct argument of pm_func. */ 700 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 701 702 if (!acpi_disabled("bus")) 703 acpi_probe_children(dev); 704 705 /* Update all GPEs and enable runtime GPEs. */ 706 status = AcpiUpdateAllGpes(); 707 if (ACPI_FAILURE(status)) { 708 device_printf(dev, "Could not update all GPEs: %s\n", 709 AcpiFormatException(status)); 710 } 711 712 /* Allow sleep request after a while. */ 713 /* timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); */ 714 715 error = 0; 716 717 out: 718 cputimer_intr_pmfixup(); 719 acpi_task_thread_schedule(); 720 return_VALUE (error); 721 } 722 723 static int 724 acpi_suspend(device_t dev) 725 { 726 device_t child, *devlist; 727 int error, i, numdevs, pstate; 728 729 /* First give child devices a chance to suspend. */ 730 error = bus_generic_suspend(dev); 731 if (error) 732 return (error); 733 734 /* 735 * Now, set them into the appropriate power state, usually D3. If the 736 * device has an _SxD method for the next sleep state, use that power 737 * state instead. 738 */ 739 device_get_children(dev, &devlist, &numdevs); 740 for (i = 0; i < numdevs; i++) { 741 /* If the device is not attached, we've powered it down elsewhere. */ 742 child = devlist[i]; 743 if (!device_is_attached(child)) 744 continue; 745 746 /* 747 * Default to D3 for all sleep states. The _SxD method is optional 748 * so set the powerstate even if it's absent. 749 */ 750 pstate = PCI_POWERSTATE_D3; 751 error = acpi_device_pwr_for_sleep(device_get_parent(child), 752 child, &pstate); 753 if ((error == 0 || error == ESRCH) && acpi_do_powerstate) 754 pci_set_powerstate(child, pstate); 755 } 756 kfree(devlist, M_TEMP); 757 error = 0; 758 759 return (error); 760 } 761 762 static int 763 acpi_resume(device_t dev) 764 { 765 ACPI_HANDLE handle; 766 int i, numdevs; 767 device_t child, *devlist; 768 769 /* 770 * Put all devices in D0 before resuming them. Call _S0D on each one 771 * since some systems expect this. 772 */ 773 device_get_children(dev, &devlist, &numdevs); 774 for (i = 0; i < numdevs; i++) { 775 child = devlist[i]; 776 handle = acpi_get_handle(child); 777 if (handle) 778 AcpiEvaluateObject(handle, "_S0D", NULL, NULL); 779 if (device_is_attached(child) && acpi_do_powerstate) 780 pci_set_powerstate(child, PCI_POWERSTATE_D0); 781 } 782 kfree(devlist, M_TEMP); 783 784 return (bus_generic_resume(dev)); 785 } 786 787 static int 788 acpi_shutdown(device_t dev) 789 { 790 /* Allow children to shutdown first. */ 791 bus_generic_shutdown(dev); 792 793 /* 794 * Enable any GPEs that are able to power-on the system (i.e., RTC). 795 * Also, disable any that are not valid for this state (most). 796 */ 797 acpi_wake_prep_walk(ACPI_STATE_S5); 798 799 return (0); 800 } 801 802 /* 803 * Handle a new device being added 804 */ 805 static device_t 806 acpi_add_child(device_t bus, device_t parent, int order, const char *name, int unit) 807 { 808 struct acpi_device *ad; 809 device_t child; 810 811 if ((ad = kmalloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 812 return (NULL); 813 814 resource_list_init(&ad->ad_rl); 815 child = device_add_child_ordered(parent, order, name, unit); 816 if (child != NULL) 817 device_set_ivars(child, ad); 818 else 819 kfree(ad, M_ACPIDEV); 820 return (child); 821 } 822 823 static int 824 acpi_print_child(device_t bus, device_t child) 825 { 826 struct acpi_device *adev = device_get_ivars(child); 827 struct resource_list *rl = &adev->ad_rl; 828 int retval = 0; 829 830 retval += bus_print_child_header(bus, child); 831 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 832 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 833 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 834 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 835 if (device_get_flags(child)) 836 retval += kprintf(" flags %#x", device_get_flags(child)); 837 retval += bus_print_child_footer(bus, child); 838 839 return (retval); 840 } 841 842 /* 843 * If this device is an ACPI child but no one claimed it, attempt 844 * to power it off. We'll power it back up when a driver is added. 845 * 846 * XXX Disabled for now since many necessary devices (like fdc and 847 * ATA) don't claim the devices we created for them but still expect 848 * them to be powered up. 849 */ 850 static void 851 acpi_probe_nomatch(device_t bus, device_t child) 852 { 853 854 /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */ 855 } 856 857 /* 858 * If a new driver has a chance to probe a child, first power it up. 859 * 860 * XXX Disabled for now (see acpi_probe_nomatch for details). 861 */ 862 static void 863 acpi_driver_added(device_t dev, driver_t *driver) 864 { 865 device_t child, *devlist; 866 int i, numdevs; 867 868 DEVICE_IDENTIFY(driver, dev); 869 device_get_children(dev, &devlist, &numdevs); 870 for (i = 0; i < numdevs; i++) { 871 child = devlist[i]; 872 if (device_get_state(child) == DS_NOTPRESENT) { 873 /* pci_set_powerstate(child, PCI_POWERSTATE_D0); */ 874 if (device_probe_and_attach(child) != 0) 875 ; /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */ 876 } 877 } 878 kfree(devlist, M_TEMP); 879 } 880 881 /* Location hint for devctl(8) */ 882 static int 883 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf, 884 size_t buflen) 885 { 886 struct acpi_device *dinfo = device_get_ivars(child); 887 888 if (dinfo->ad_handle) 889 ksnprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle)); 890 else 891 ksnprintf(buf, buflen, "unknown"); 892 return (0); 893 } 894 895 /* PnP information for devctl(8) */ 896 static int 897 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 898 size_t buflen) 899 { 900 ACPI_DEVICE_INFO *adinfo; 901 struct acpi_device *dinfo = device_get_ivars(child); 902 char *end; 903 904 if (ACPI_FAILURE(AcpiGetObjectInfo(dinfo->ad_handle, &adinfo))) { 905 ksnprintf(buf, buflen, "unknown"); 906 } else { 907 ksnprintf(buf, buflen, "_HID=%s _UID=%lu", 908 (adinfo->Valid & ACPI_VALID_HID) ? 909 adinfo->HardwareId.String : "none", 910 (adinfo->Valid & ACPI_VALID_UID) ? 911 strtoul(adinfo->UniqueId.String, &end, 10) : 0); 912 if (adinfo) 913 AcpiOsFree(adinfo); 914 } 915 return (0); 916 } 917 918 /* 919 * Handle per-device ivars 920 */ 921 static int 922 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 923 { 924 struct acpi_device *ad; 925 926 if ((ad = device_get_ivars(child)) == NULL) { 927 device_printf(child, "device has no ivars\n"); 928 return (ENOENT); 929 } 930 931 /* ACPI and ISA compatibility ivars */ 932 switch(index) { 933 case ACPI_IVAR_HANDLE: 934 *(ACPI_HANDLE *)result = ad->ad_handle; 935 break; 936 case ACPI_IVAR_MAGIC: 937 *result = ad->ad_magic; 938 break; 939 case ACPI_IVAR_PRIVATE: 940 *(void **)result = ad->ad_private; 941 break; 942 case ACPI_IVAR_FLAGS: 943 *(int *)result = ad->ad_flags; 944 break; 945 case ISA_IVAR_VENDORID: 946 case ISA_IVAR_SERIAL: 947 case ISA_IVAR_COMPATID: 948 *(int *)result = -1; 949 break; 950 case ISA_IVAR_LOGICALID: 951 *(int *)result = acpi_isa_get_logicalid(child); 952 break; 953 default: 954 return (ENOENT); 955 } 956 957 return (0); 958 } 959 960 static int 961 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 962 { 963 struct acpi_device *ad; 964 965 if ((ad = device_get_ivars(child)) == NULL) { 966 device_printf(child, "device has no ivars\n"); 967 return (ENOENT); 968 } 969 970 switch(index) { 971 case ACPI_IVAR_HANDLE: 972 ad->ad_handle = (ACPI_HANDLE)value; 973 break; 974 case ACPI_IVAR_MAGIC: 975 ad->ad_magic = value; 976 break; 977 case ACPI_IVAR_PRIVATE: 978 ad->ad_private = (void *)value; 979 break; 980 case ACPI_IVAR_FLAGS: 981 ad->ad_flags = (int)value; 982 break; 983 default: 984 panic("bad ivar write request (%d)", index); 985 return (ENOENT); 986 } 987 988 return (0); 989 } 990 991 /* 992 * Handle child resource allocation/removal 993 */ 994 static struct resource_list * 995 acpi_get_rlist(device_t dev, device_t child) 996 { 997 struct acpi_device *ad; 998 999 ad = device_get_ivars(child); 1000 return (&ad->ad_rl); 1001 } 1002 1003 /* 1004 * Pre-allocate/manage all memory and IO resources. Since rman can't handle 1005 * duplicates, we merge any in the sysresource attach routine. 1006 */ 1007 static int 1008 acpi_sysres_alloc(device_t dev) 1009 { 1010 struct resource *res; 1011 struct resource_list *rl; 1012 struct resource_list_entry *rle; 1013 struct rman *rm; 1014 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 1015 device_t *children; 1016 int child_count, i; 1017 /* 1018 * Probe/attach any sysresource devices. This would be unnecessary if we 1019 * had multi-pass probe/attach. 1020 */ 1021 if (device_get_children(dev, &children, &child_count) != 0) 1022 return (ENXIO); 1023 for (i = 0; i < child_count; i++) { 1024 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 1025 device_probe_and_attach(children[i]); 1026 } 1027 kfree(children, M_TEMP); 1028 1029 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev); 1030 if(!rl) 1031 return 0; 1032 SLIST_FOREACH(rle, rl, link) { 1033 if (rle->res != NULL) { 1034 device_printf(dev, "duplicate resource for %lx\n", rle->start); 1035 continue; 1036 } 1037 1038 /* Only memory and IO resources are valid here. */ 1039 switch (rle->type) { 1040 case SYS_RES_IOPORT: 1041 rm = &acpi_rman_io; 1042 break; 1043 case SYS_RES_MEMORY: 1044 rm = &acpi_rman_mem; 1045 break; 1046 default: 1047 continue; 1048 } 1049 1050 /* Pre-allocate resource and add to our rman pool. */ 1051 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type, 1052 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 1053 0, -1); 1054 if (res != NULL) { 1055 rman_manage_region(rm, rman_get_start(res), rman_get_end(res)); 1056 rle->res = res; 1057 } else 1058 device_printf(dev, "reservation of %lx, %lx (%d) failed\n", 1059 rle->start, rle->count, rle->type); 1060 } 1061 return (0); 1062 } 1063 1064 static struct resource * 1065 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 1066 u_long start, u_long end, u_long count, u_int flags, int cpuid) 1067 { 1068 ACPI_RESOURCE ares; 1069 struct acpi_device *ad = device_get_ivars(child); 1070 struct resource_list *rl = &ad->ad_rl; 1071 struct resource_list_entry *rle; 1072 struct resource *res; 1073 struct rman *rm; 1074 1075 res = NULL; 1076 1077 /* We only handle memory and IO resources through rman. */ 1078 switch (type) { 1079 case SYS_RES_IOPORT: 1080 rm = &acpi_rman_io; 1081 break; 1082 case SYS_RES_MEMORY: 1083 rm = &acpi_rman_mem; 1084 break; 1085 default: 1086 rm = NULL; 1087 } 1088 1089 ACPI_SERIAL_BEGIN(acpi); 1090 1091 /* 1092 * If this is an allocation of the "default" range for a given RID, and 1093 * we know what the resources for this device are (i.e., they're on the 1094 * child's resource list), use those start/end values. 1095 */ 1096 if (bus == device_get_parent(child) && start == 0UL && end == ~0UL) { 1097 rle = resource_list_find(rl, type, *rid); 1098 if (rle == NULL) 1099 goto out; 1100 start = rle->start; 1101 end = rle->end; 1102 count = rle->count; 1103 cpuid = rle->cpuid; 1104 } 1105 1106 /* 1107 * If this is an allocation of a specific range, see if we can satisfy 1108 * the request from our system resource regions. If we can't, pass the 1109 * request up to the parent. 1110 */ 1111 if (start + count - 1 == end && rm != NULL) 1112 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE, 1113 child); 1114 if (res == NULL) { 1115 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid, 1116 start, end, count, flags, cpuid); 1117 } else { 1118 rman_set_rid(res, *rid); 1119 1120 /* If requested, activate the resource using the parent's method. */ 1121 if (flags & RF_ACTIVE) 1122 if (bus_activate_resource(child, type, *rid, res) != 0) { 1123 rman_release_resource(res); 1124 res = NULL; 1125 goto out; 1126 } 1127 } 1128 1129 if (res != NULL && device_get_parent(child) == bus) 1130 switch (type) { 1131 case SYS_RES_IRQ: 1132 /* 1133 * Since bus_config_intr() takes immediate effect, we cannot 1134 * configure the interrupt associated with a device when we 1135 * parse the resources but have to defer it until a driver 1136 * actually allocates the interrupt via bus_alloc_resource(). 1137 * 1138 * NB: Lookup failure is fine, since the device may add its 1139 * own interrupt resources, e.g. MSI or MSI-X. 1140 */ 1141 if (ACPI_SUCCESS( 1142 acpi_lookup_irq_resource(child, *rid, res, &ares))) { 1143 acpi_config_intr(child, &ares); 1144 } else { 1145 kprintf("irq resource not found\n"); 1146 } 1147 break; 1148 } 1149 1150 out: 1151 ACPI_SERIAL_END(acpi); 1152 return (res); 1153 } 1154 1155 static int 1156 acpi_release_resource(device_t bus, device_t child, int type, int rid, 1157 struct resource *r) 1158 { 1159 struct rman *rm; 1160 int ret; 1161 1162 /* We only handle memory and IO resources through rman. */ 1163 switch (type) { 1164 case SYS_RES_IOPORT: 1165 rm = &acpi_rman_io; 1166 break; 1167 case SYS_RES_MEMORY: 1168 rm = &acpi_rman_mem; 1169 break; 1170 default: 1171 rm = NULL; 1172 } 1173 1174 ACPI_SERIAL_BEGIN(acpi); 1175 1176 /* 1177 * If this resource belongs to one of our internal managers, 1178 * deactivate it and release it to the local pool. If it doesn't, 1179 * pass this request up to the parent. 1180 */ 1181 if (rm != NULL && rman_is_region_manager(r, rm)) { 1182 if (rman_get_flags(r) & RF_ACTIVE) { 1183 ret = bus_deactivate_resource(child, type, rid, r); 1184 if (ret != 0) 1185 goto out; 1186 } 1187 ret = rman_release_resource(r); 1188 } else 1189 ret = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, type, rid, r); 1190 1191 out: 1192 ACPI_SERIAL_END(acpi); 1193 return (ret); 1194 } 1195 1196 static void 1197 acpi_delete_resource(device_t bus, device_t child, int type, int rid) 1198 { 1199 struct resource_list *rl; 1200 1201 rl = acpi_get_rlist(bus, child); 1202 resource_list_delete(rl, type, rid); 1203 } 1204 1205 /* Allocate an IO port or memory resource, given its GAS. */ 1206 int 1207 acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas, 1208 struct resource **res, u_int flags) 1209 { 1210 int error, res_type; 1211 1212 error = ENOMEM; 1213 if (type == NULL || rid == NULL || gas == NULL || res == NULL) 1214 return (EINVAL); 1215 1216 /* We only support memory and IO spaces. */ 1217 switch (gas->SpaceId) { 1218 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1219 res_type = SYS_RES_MEMORY; 1220 break; 1221 case ACPI_ADR_SPACE_SYSTEM_IO: 1222 res_type = SYS_RES_IOPORT; 1223 break; 1224 default: 1225 return (EOPNOTSUPP); 1226 } 1227 1228 /* 1229 * If the register width is less than 8, assume the BIOS author means 1230 * it is a bit field and just allocate a byte. 1231 */ 1232 if (gas->BitWidth && gas->BitWidth < 8) 1233 gas->BitWidth = 8; 1234 1235 /* Validate the address after we're sure we support the space. */ 1236 if (gas->Address == 0 || gas->BitWidth == 0) 1237 return (EINVAL); 1238 1239 bus_set_resource(dev, res_type, *rid, gas->Address, 1240 gas->BitWidth / 8, -1); 1241 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags); 1242 if (*res != NULL) { 1243 *type = res_type; 1244 error = 0; 1245 } else 1246 bus_delete_resource(dev, res_type, *rid); 1247 1248 return (error); 1249 } 1250 1251 ACPI_STATUS 1252 acpi_eval_osc(device_t dev, ACPI_HANDLE handle, const char *uuidstr, 1253 int revision, uint32_t *buf, int count) 1254 { 1255 ACPI_BUFFER retbuf = { ACPI_ALLOCATE_BUFFER, NULL }; 1256 ACPI_OBJECT_LIST arglist; 1257 ACPI_OBJECT arg[4]; 1258 ACPI_OBJECT *retobj; 1259 ACPI_STATUS status; 1260 struct uuid uuid; 1261 uint32_t error; 1262 uint8_t oscuuid[16]; 1263 int i; 1264 1265 if (parse_uuid(uuidstr, &uuid) != 0) 1266 return (AE_ERROR); 1267 le_uuid_enc(oscuuid, &uuid); 1268 1269 arglist.Pointer = arg; 1270 arglist.Count = 4; 1271 arg[0].Type = ACPI_TYPE_BUFFER; 1272 arg[0].Buffer.Length = sizeof(oscuuid); 1273 arg[0].Buffer.Pointer = oscuuid; /* UUID */ 1274 arg[1].Type = ACPI_TYPE_INTEGER; 1275 arg[1].Integer.Value = revision; /* revision */ 1276 arg[2].Type = ACPI_TYPE_INTEGER; 1277 arg[2].Integer.Value = count; /* # of cap integers */ 1278 arg[3].Type = ACPI_TYPE_BUFFER; 1279 arg[3].Buffer.Length = count * sizeof(uint32_t); /* capabilities buffer */ 1280 arg[3].Buffer.Pointer = (uint8_t *)buf; 1281 1282 status = AcpiEvaluateObject(handle, "_OSC", &arglist, &retbuf); 1283 if (ACPI_FAILURE(status)) 1284 goto done; 1285 retobj = retbuf.Pointer; 1286 error = ((uint32_t *)retobj->Buffer.Pointer)[0] & ACPI_OSCERR_MASK; 1287 if (error == 0) 1288 goto done; 1289 status = AE_ERROR; 1290 if (error & ACPI_OSCERR_OSCFAIL) 1291 device_printf(dev, "_OSC unable to process request\n"); 1292 if (error & ACPI_OSCERR_UUID) 1293 device_printf(dev, "_OSC unrecognized UUID (%s)\n", uuidstr); 1294 if (error & ACPI_OSCERR_REVISION) 1295 device_printf(dev, "_OSC unrecognized revision ID (%d)\n", revision); 1296 if (error & ACPI_OSCERR_CAPSMASKED) { 1297 if ((buf[0] & ACPI_OSC_QUERY_SUPPORT) == 0) { 1298 for (i = 1; i < count; i++) { 1299 device_printf(dev, 1300 "_OSC capabilities have been masked: buf[%d]:%#x\n", 1301 i, buf[i] & ~((uint32_t *)retobj->Buffer.Pointer)[i]); 1302 } 1303 status = AE_SUPPORT; 1304 } else { 1305 status = AE_OK; 1306 } 1307 } 1308 1309 done: 1310 if (retbuf.Pointer != NULL) 1311 AcpiOsFree(retbuf.Pointer); 1312 return (status); 1313 } 1314 1315 /* Probe _HID and _CID for compatible ISA PNP ids. */ 1316 static uint32_t 1317 acpi_isa_get_logicalid(device_t dev) 1318 { 1319 ACPI_DEVICE_INFO *devinfo; 1320 ACPI_HANDLE h; 1321 uint32_t pnpid; 1322 1323 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1324 1325 devinfo = NULL; 1326 pnpid = 0; 1327 1328 /* Fetch and validate the HID. */ 1329 if ((h = acpi_get_handle(dev)) == NULL || 1330 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1331 goto out; 1332 1333 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 1334 pnpid = PNP_EISAID(devinfo->HardwareId.String); 1335 1336 out: 1337 if (devinfo) 1338 AcpiOsFree(devinfo); 1339 return_VALUE (pnpid); 1340 } 1341 1342 static int 1343 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 1344 { 1345 ACPI_DEVICE_INFO *devinfo; 1346 ACPI_HANDLE h; 1347 uint32_t *pnpid; 1348 int valid, i; 1349 1350 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1351 1352 devinfo = NULL; 1353 pnpid = cids; 1354 valid = 0; 1355 1356 /* Fetch and validate the CID */ 1357 if ((h = acpi_get_handle(dev)) == NULL || 1358 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)) || 1359 (devinfo->Valid & ACPI_VALID_CID) == 0) 1360 goto out; 1361 1362 if (devinfo->CompatibleIdList.Count < count) 1363 count = devinfo->CompatibleIdList.Count; 1364 for (i = 0; i < count; i++) { 1365 if (strncmp(devinfo->CompatibleIdList.Ids[i].String, "PNP", 3) != 0) 1366 continue; 1367 *pnpid++ = PNP_EISAID(devinfo->CompatibleIdList.Ids[i].String); 1368 valid++; 1369 } 1370 1371 out: 1372 if (devinfo) 1373 AcpiOsFree(devinfo); 1374 return_VALUE (valid); 1375 } 1376 1377 static char * 1378 acpi_device_id_probe(device_t bus, device_t dev, char **ids) 1379 { 1380 ACPI_HANDLE h; 1381 int i; 1382 1383 h = acpi_get_handle(dev); 1384 if (ids == NULL || h == NULL || acpi_get_type(dev) != ACPI_TYPE_DEVICE) 1385 return (NULL); 1386 1387 /* Try to match one of the array of IDs with a HID or CID. */ 1388 for (i = 0; ids[i] != NULL; i++) { 1389 if (acpi_MatchHid(h, ids[i])) 1390 return (ids[i]); 1391 } 1392 return (NULL); 1393 } 1394 1395 static ACPI_STATUS 1396 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname, 1397 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret) 1398 { 1399 ACPI_HANDLE h; 1400 1401 if (dev == NULL) 1402 h = ACPI_ROOT_OBJECT; 1403 else if ((h = acpi_get_handle(dev)) == NULL) 1404 return (AE_BAD_PARAMETER); 1405 return (AcpiEvaluateObject(h, pathname, parameters, ret)); 1406 } 1407 1408 static int 1409 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate) 1410 { 1411 struct acpi_softc *sc; 1412 ACPI_HANDLE handle; 1413 ACPI_STATUS status; 1414 char sxd[8]; 1415 int error; 1416 1417 sc = device_get_softc(bus); 1418 handle = acpi_get_handle(dev); 1419 1420 /* 1421 * XXX If we find these devices, don't try to power them down. 1422 * The serial and IRDA ports on my T23 hang the system when 1423 * set to D3 and it appears that such legacy devices may 1424 * need special handling in their drivers. 1425 */ 1426 if (handle == NULL || 1427 acpi_MatchHid(handle, "PNP0500") || 1428 acpi_MatchHid(handle, "PNP0501") || 1429 acpi_MatchHid(handle, "PNP0502") || 1430 acpi_MatchHid(handle, "PNP0510") || 1431 acpi_MatchHid(handle, "PNP0511")) 1432 return (ENXIO); 1433 1434 /* 1435 * Override next state with the value from _SxD, if present. If no 1436 * dstate argument was provided, don't fetch the return value. 1437 */ 1438 ksnprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate); 1439 if (dstate) 1440 status = acpi_GetInteger(handle, sxd, dstate); 1441 else 1442 status = AcpiEvaluateObject(handle, sxd, NULL, NULL); 1443 1444 switch (status) { 1445 case AE_OK: 1446 error = 0; 1447 break; 1448 case AE_NOT_FOUND: 1449 error = ESRCH; 1450 break; 1451 default: 1452 error = ENXIO; 1453 break; 1454 } 1455 1456 return (error); 1457 } 1458 1459 /* Callback arg for our implementation of walking the namespace. */ 1460 struct acpi_device_scan_ctx { 1461 acpi_scan_cb_t user_fn; 1462 void *arg; 1463 ACPI_HANDLE parent; 1464 }; 1465 1466 static ACPI_STATUS 1467 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval) 1468 { 1469 struct acpi_device_scan_ctx *ctx; 1470 device_t dev, old_dev; 1471 ACPI_STATUS status; 1472 ACPI_OBJECT_TYPE type; 1473 1474 /* 1475 * Skip this device if we think we'll have trouble with it or it is 1476 * the parent where the scan began. 1477 */ 1478 ctx = (struct acpi_device_scan_ctx *)arg; 1479 if (acpi_avoid(h) || h == ctx->parent) 1480 return (AE_OK); 1481 1482 /* If this is not a valid device type (e.g., a method), skip it. */ 1483 if (ACPI_FAILURE(AcpiGetType(h, &type))) 1484 return (AE_OK); 1485 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR && 1486 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER) 1487 return (AE_OK); 1488 1489 /* 1490 * Call the user function with the current device. If it is unchanged 1491 * afterwards, return. Otherwise, we update the handle to the new dev. 1492 */ 1493 old_dev = acpi_get_device(h); 1494 dev = old_dev; 1495 status = ctx->user_fn(h, &dev, level, ctx->arg); 1496 if (ACPI_FAILURE(status) || old_dev == dev) 1497 return (status); 1498 1499 /* Remove the old child and its connection to the handle. */ 1500 if (old_dev != NULL) { 1501 device_delete_child(device_get_parent(old_dev), old_dev); 1502 AcpiDetachData(h, acpi_fake_objhandler); 1503 } 1504 1505 /* Recreate the handle association if the user created a device. */ 1506 if (dev != NULL) 1507 AcpiAttachData(h, acpi_fake_objhandler, dev); 1508 1509 return (AE_OK); 1510 } 1511 1512 static ACPI_STATUS 1513 acpi_device_scan_children(device_t bus, device_t dev, int max_depth, 1514 acpi_scan_cb_t user_fn, void *arg) 1515 { 1516 ACPI_HANDLE h; 1517 struct acpi_device_scan_ctx ctx; 1518 1519 if (acpi_disabled("children")) 1520 return (AE_OK); 1521 1522 if (dev == NULL) 1523 h = ACPI_ROOT_OBJECT; 1524 else if ((h = acpi_get_handle(dev)) == NULL) 1525 return (AE_BAD_PARAMETER); 1526 ctx.user_fn = user_fn; 1527 ctx.arg = arg; 1528 ctx.parent = h; 1529 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth, 1530 acpi_device_scan_cb, NULL, &ctx, NULL)); 1531 } 1532 1533 /* 1534 * Even though ACPI devices are not PCI, we use the PCI approach for setting 1535 * device power states since it's close enough to ACPI. 1536 */ 1537 static int 1538 acpi_set_powerstate_method(device_t bus, device_t child, int state) 1539 { 1540 ACPI_HANDLE h; 1541 ACPI_STATUS status; 1542 int error; 1543 1544 error = 0; 1545 h = acpi_get_handle(child); 1546 if (state < ACPI_STATE_D0 || state > ACPI_STATE_D3) 1547 return (EINVAL); 1548 if (h == NULL) 1549 return (0); 1550 1551 /* Ignore errors if the power methods aren't present. */ 1552 status = acpi_pwr_switch_consumer(h, state); 1553 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND 1554 && status != AE_BAD_PARAMETER) 1555 device_printf(bus, "failed to set ACPI power state D%d on %s: %s\n", 1556 state, acpi_name(h), AcpiFormatException(status)); 1557 1558 return (error); 1559 } 1560 1561 static int 1562 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 1563 { 1564 int result, cid_count, i; 1565 uint32_t lid, cids[8]; 1566 1567 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1568 1569 /* 1570 * ISA-style drivers attached to ACPI may persist and 1571 * probe manually if we return ENOENT. We never want 1572 * that to happen, so don't ever return it. 1573 */ 1574 result = ENXIO; 1575 1576 /* Scan the supplied IDs for a match */ 1577 lid = acpi_isa_get_logicalid(child); 1578 cid_count = acpi_isa_get_compatid(child, cids, 8); 1579 while (ids && ids->ip_id) { 1580 if (lid == ids->ip_id) { 1581 result = 0; 1582 goto out; 1583 } 1584 for (i = 0; i < cid_count; i++) { 1585 if (cids[i] == ids->ip_id) { 1586 result = 0; 1587 goto out; 1588 } 1589 } 1590 ids++; 1591 } 1592 1593 out: 1594 if (result == 0 && ids->ip_desc) 1595 device_set_desc(child, ids->ip_desc); 1596 1597 return_VALUE (result); 1598 } 1599 1600 /* 1601 * Look for a MCFG table. If it is present, use the settings for 1602 * domain (segment) 0 to setup PCI config space access via the memory 1603 * map. 1604 */ 1605 static void 1606 acpi_enable_pcie(void) 1607 { 1608 ACPI_TABLE_HEADER *hdr; 1609 ACPI_MCFG_ALLOCATION *alloc, *end; 1610 ACPI_STATUS status; 1611 1612 status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr); 1613 if (ACPI_FAILURE(status)) 1614 return; 1615 1616 end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length); 1617 alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1); 1618 while (alloc < end) { 1619 if (alloc->PciSegment == 0) { 1620 pcie_cfgregopen(alloc->Address, alloc->StartBusNumber, 1621 alloc->EndBusNumber); 1622 return; 1623 } 1624 alloc++; 1625 } 1626 } 1627 1628 /* 1629 * Scan all of the ACPI namespace and attach child devices. 1630 * 1631 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and 1632 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec. 1633 * However, in violation of the spec, some systems place their PCI link 1634 * devices in \, so we have to walk the whole namespace. We check the 1635 * type of namespace nodes, so this should be ok. 1636 */ 1637 static void 1638 acpi_probe_children(device_t bus) 1639 { 1640 1641 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1642 1643 /* 1644 * Scan the namespace and insert placeholders for all the devices that 1645 * we find. We also probe/attach any early devices. 1646 * 1647 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1648 * we want to create nodes for all devices, not just those that are 1649 * currently present. (This assumes that we don't want to create/remove 1650 * devices as they appear, which might be smarter.) 1651 */ 1652 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1653 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, 1654 acpi_probe_child, NULL, bus, NULL); 1655 1656 /* Pre-allocate resources for our rman from any sysresource devices. */ 1657 acpi_sysres_alloc(bus); 1658 /* Create any static children by calling device identify methods. */ 1659 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1660 bus_generic_probe(bus); 1661 1662 /* Probe/attach all children, created staticly and from the namespace. */ 1663 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 1664 bus_generic_attach(bus); 1665 1666 /* 1667 * Some of these children may have attached others as part of their attach 1668 * process (eg. the root PCI bus driver), so rescan. 1669 */ 1670 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 1671 bus_generic_attach(bus); 1672 1673 /* Attach wake sysctls. */ 1674 acpi_wake_sysctl_walk(bus); 1675 1676 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1677 return_VOID; 1678 } 1679 1680 /* 1681 * Determine the probe order for a given device. 1682 */ 1683 static void 1684 acpi_probe_order(ACPI_HANDLE handle, int *order) 1685 { 1686 ACPI_OBJECT_TYPE type; 1687 1688 /* 1689 * 1. I/O port and memory system resource holders 1690 * 2. Embedded controllers (to handle early accesses) 1691 * 3. PCI Link Devices 1692 * 100000. CPUs 1693 */ 1694 AcpiGetType(handle, &type); 1695 if (acpi_MatchHid(handle, "PNP0C01") || acpi_MatchHid(handle, "PNP0C02")) 1696 *order = 1; 1697 else if (acpi_MatchHid(handle, "PNP0C09")) 1698 *order = 2; 1699 else if (acpi_MatchHid(handle, "PNP0C0F")) 1700 *order = 3; 1701 else if (type == ACPI_TYPE_PROCESSOR) 1702 *order = 100000; 1703 } 1704 1705 /* 1706 * Evaluate a child device and determine whether we might attach a device to 1707 * it. 1708 */ 1709 static ACPI_STATUS 1710 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1711 { 1712 struct acpi_prw_data prw; 1713 ACPI_OBJECT_TYPE type; 1714 ACPI_HANDLE h; 1715 device_t bus, child; 1716 int order; 1717 char *handle_str; 1718 1719 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1720 1721 if (acpi_disabled("children")) 1722 return_ACPI_STATUS (AE_OK); 1723 1724 /* Skip this device if we think we'll have trouble with it. */ 1725 if (acpi_avoid(handle)) 1726 return_ACPI_STATUS (AE_OK); 1727 1728 bus = (device_t)context; 1729 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1730 handle_str = acpi_name(handle); 1731 switch (type) { 1732 case ACPI_TYPE_DEVICE: 1733 /* 1734 * Since we scan from \, be sure to skip system scope objects. 1735 * \_SB_ and \_TZ_ are defined in ACPICA as devices to work around 1736 * BIOS bugs. For example, \_SB_ is to allow \_SB_._INI to be run 1737 * during the intialization and \_TZ_ is to support Notify() on it. 1738 */ 1739 if (strcmp(handle_str, "\\_SB_") == 0 || 1740 strcmp(handle_str, "\\_TZ_") == 0) 1741 break; 1742 1743 if (acpi_parse_prw(handle, &prw) == 0) 1744 AcpiSetupGpeForWake(handle, prw.gpe_handle, prw.gpe_bit); 1745 1746 /* FALLTHROUGH */ 1747 case ACPI_TYPE_PROCESSOR: 1748 case ACPI_TYPE_THERMAL: 1749 case ACPI_TYPE_POWER: 1750 /* 1751 * Create a placeholder device for this node. Sort the 1752 * placeholder so that the probe/attach passes will run 1753 * breadth-first. Orders less than ACPI_DEV_BASE_ORDER 1754 * are reserved for special objects (i.e., system 1755 * resources). CPU devices have a very high order to 1756 * ensure they are probed after other devices. 1757 */ 1758 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str)); 1759 order = level * 10 + 100; 1760 acpi_probe_order(handle, &order); 1761 child = BUS_ADD_CHILD(bus, bus, order, NULL, -1); 1762 if (child == NULL) 1763 break; 1764 1765 /* Associate the handle with the device_t and vice versa. */ 1766 acpi_set_handle(child, handle); 1767 AcpiAttachData(handle, acpi_fake_objhandler, child); 1768 1769 /* 1770 * Check that the device is present. If it's not present, 1771 * leave it disabled (so that we have a device_t attached to 1772 * the handle, but we don't probe it). 1773 * 1774 * XXX PCI link devices sometimes report "present" but not 1775 * "functional" (i.e. if disabled). Go ahead and probe them 1776 * anyway since we may enable them later. 1777 */ 1778 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 1779 /* Never disable PCI link devices. */ 1780 if (acpi_MatchHid(handle, "PNP0C0F")) 1781 break; 1782 /* 1783 * Docking stations should remain enabled since the system 1784 * may be undocked at boot. 1785 */ 1786 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h))) 1787 break; 1788 1789 device_disable(child); 1790 break; 1791 } 1792 1793 /* 1794 * Get the device's resource settings and attach them. 1795 * Note that if the device has _PRS but no _CRS, we need 1796 * to decide when it's appropriate to try to configure the 1797 * device. Ignore the return value here; it's OK for the 1798 * device not to have any resources. 1799 */ 1800 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 1801 break; 1802 } 1803 } 1804 1805 return_ACPI_STATUS (AE_OK); 1806 } 1807 1808 /* 1809 * AcpiAttachData() requires an object handler but never uses it. This is a 1810 * placeholder object handler so we can store a device_t in an ACPI_HANDLE. 1811 */ 1812 void 1813 acpi_fake_objhandler(ACPI_HANDLE h, void *data) 1814 { 1815 } 1816 1817 static void 1818 acpi_shutdown_final(void *arg, int howto) 1819 { 1820 struct acpi_softc *sc; 1821 ACPI_STATUS status; 1822 1823 /* 1824 * XXX Shutdown code should only run on the BSP (cpuid 0). 1825 * Some chipsets do not power off the system correctly if called from 1826 * an AP. 1827 */ 1828 sc = arg; 1829 if ((howto & RB_POWEROFF) != 0) { 1830 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 1831 if (ACPI_FAILURE(status)) { 1832 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 1833 AcpiFormatException(status)); 1834 return; 1835 } 1836 device_printf(sc->acpi_dev, "Powering system off\n"); 1837 ACPI_DISABLE_IRQS(); 1838 status = AcpiEnterSleepState(ACPI_STATE_S5); 1839 if (ACPI_FAILURE(status)) { 1840 device_printf(sc->acpi_dev, "power-off failed - %s\n", 1841 AcpiFormatException(status)); 1842 } else { 1843 DELAY(1000000); 1844 device_printf(sc->acpi_dev, "power-off failed - timeout\n"); 1845 } 1846 } else if ((howto & RB_HALT) == 0 && sc->acpi_handle_reboot) { 1847 /* Reboot using the reset register. */ 1848 status = AcpiReset(); 1849 if (ACPI_FAILURE(status)) { 1850 if (status != AE_NOT_EXIST) 1851 device_printf(sc->acpi_dev, "reset failed - %s\n", 1852 AcpiFormatException(status)); 1853 } else { 1854 DELAY(1000000); 1855 device_printf(sc->acpi_dev, "reset failed - timeout\n"); 1856 } 1857 } else if (sc->acpi_do_disable && panicstr == NULL) { 1858 /* 1859 * Only disable ACPI if the user requested. On some systems, writing 1860 * the disable value to SMI_CMD hangs the system. 1861 */ 1862 device_printf(sc->acpi_dev, "Shutting down\n"); 1863 AcpiTerminate(); 1864 } 1865 } 1866 1867 static void 1868 acpi_enable_fixed_events(struct acpi_softc *sc) 1869 { 1870 static int first_time = 1; 1871 1872 /* Enable and clear fixed events and install handlers. */ 1873 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) { 1874 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 1875 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 1876 acpi_event_power_button_sleep, sc); 1877 if (first_time) 1878 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 1879 } 1880 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) { 1881 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 1882 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 1883 acpi_event_sleep_button_sleep, sc); 1884 if (first_time) 1885 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 1886 } 1887 1888 first_time = 0; 1889 } 1890 1891 /* 1892 * Returns true if the device is actually present and should 1893 * be attached to. This requires the present, enabled, UI-visible 1894 * and diagnostics-passed bits to be set. 1895 */ 1896 BOOLEAN 1897 acpi_DeviceIsPresent(device_t dev) 1898 { 1899 ACPI_DEVICE_INFO *devinfo; 1900 ACPI_HANDLE h; 1901 int ret; 1902 1903 ret = FALSE; 1904 if ((h = acpi_get_handle(dev)) == NULL || 1905 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1906 return (FALSE); 1907 1908 /* If no _STA method, must be present */ 1909 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1910 ret = TRUE; 1911 1912 /* Return true for 'present' and 'functioning' */ 1913 if (ACPI_DEVICE_PRESENT(devinfo->CurrentStatus)) 1914 ret = TRUE; 1915 1916 AcpiOsFree(devinfo); 1917 return (ret); 1918 } 1919 1920 /* 1921 * Returns true if the battery is actually present and inserted. 1922 */ 1923 BOOLEAN 1924 acpi_BatteryIsPresent(device_t dev) 1925 { 1926 ACPI_DEVICE_INFO *devinfo; 1927 ACPI_HANDLE h; 1928 int ret; 1929 1930 ret = FALSE; 1931 if ((h = acpi_get_handle(dev)) == NULL || 1932 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1933 return (FALSE); 1934 1935 /* If no _STA method, must be present */ 1936 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1937 ret = TRUE; 1938 1939 /* Return true for 'present', 'battery present', and 'functioning' */ 1940 if (ACPI_BATTERY_PRESENT(devinfo->CurrentStatus)) 1941 ret = TRUE; 1942 1943 AcpiOsFree(devinfo); 1944 return (ret); 1945 } 1946 1947 /* 1948 * Match a HID string against a handle 1949 */ 1950 BOOLEAN 1951 acpi_MatchHid(ACPI_HANDLE h, const char *hid) 1952 { 1953 ACPI_DEVICE_INFO *devinfo; 1954 int ret, i; 1955 1956 ret = FALSE; 1957 if (hid == NULL || h == NULL || 1958 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1959 return (ret); 1960 1961 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 1962 strcmp(hid, devinfo->HardwareId.String) == 0) 1963 ret = TRUE; 1964 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) { 1965 for (i = 0; i < devinfo->CompatibleIdList.Count; i++) { 1966 if (strcmp(hid, devinfo->CompatibleIdList.Ids[i].String) == 0) { 1967 ret = TRUE; 1968 break; 1969 } 1970 } 1971 } 1972 1973 AcpiOsFree(devinfo); 1974 return (ret); 1975 } 1976 1977 /* 1978 * Match a UID string against a handle 1979 */ 1980 BOOLEAN 1981 acpi_MatchUid(ACPI_HANDLE h, const char *uid) 1982 { 1983 ACPI_DEVICE_INFO *devinfo; 1984 int ret; 1985 1986 ret = FALSE; 1987 if (uid == NULL || h == NULL || 1988 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1989 return (ret); 1990 1991 if ((devinfo->Valid & ACPI_VALID_UID) != 0 && 1992 strcmp(uid, devinfo->UniqueId.String) == 0) 1993 ret = TRUE; 1994 1995 AcpiOsFree(devinfo); 1996 return (ret); 1997 } 1998 1999 /* 2000 * Return the handle of a named object within our scope, ie. that of (parent) 2001 * or one if its parents. 2002 */ 2003 ACPI_STATUS 2004 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 2005 { 2006 ACPI_HANDLE r; 2007 ACPI_STATUS status; 2008 2009 /* Walk back up the tree to the root */ 2010 for (;;) { 2011 status = AcpiGetHandle(parent, path, &r); 2012 if (ACPI_SUCCESS(status)) { 2013 *result = r; 2014 return (AE_OK); 2015 } 2016 /* XXX Return error here? */ 2017 if (status != AE_NOT_FOUND) 2018 return (AE_OK); 2019 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 2020 return (AE_NOT_FOUND); 2021 parent = r; 2022 } 2023 } 2024 2025 /* 2026 * Allocate a buffer with a preset data size. 2027 */ 2028 ACPI_BUFFER * 2029 acpi_AllocBuffer(int size) 2030 { 2031 ACPI_BUFFER *buf; 2032 2033 if ((buf = kmalloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 2034 return (NULL); 2035 buf->Length = size; 2036 buf->Pointer = (void *)(buf + 1); 2037 return (buf); 2038 } 2039 2040 ACPI_STATUS 2041 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 2042 { 2043 ACPI_OBJECT arg1; 2044 ACPI_OBJECT_LIST args; 2045 2046 arg1.Type = ACPI_TYPE_INTEGER; 2047 arg1.Integer.Value = number; 2048 args.Count = 1; 2049 args.Pointer = &arg1; 2050 2051 return (AcpiEvaluateObject(handle, path, &args, NULL)); 2052 } 2053 2054 /* 2055 * Evaluate a path that should return an integer. 2056 */ 2057 ACPI_STATUS 2058 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 2059 { 2060 ACPI_STATUS status; 2061 ACPI_BUFFER buf; 2062 ACPI_OBJECT param; 2063 2064 if (handle == NULL) 2065 handle = ACPI_ROOT_OBJECT; 2066 2067 /* 2068 * Assume that what we've been pointed at is an Integer object, or 2069 * a method that will return an Integer. 2070 */ 2071 buf.Pointer = ¶m; 2072 buf.Length = sizeof(param); 2073 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2074 if (ACPI_SUCCESS(status)) { 2075 if (param.Type == ACPI_TYPE_INTEGER) 2076 *number = param.Integer.Value; 2077 else 2078 status = AE_TYPE; 2079 } 2080 2081 /* 2082 * In some applications, a method that's expected to return an Integer 2083 * may instead return a Buffer (probably to simplify some internal 2084 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 2085 * convert it into an Integer as best we can. 2086 * 2087 * This is a hack. 2088 */ 2089 if (status == AE_BUFFER_OVERFLOW) { 2090 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 2091 status = AE_NO_MEMORY; 2092 } else { 2093 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2094 if (ACPI_SUCCESS(status)) 2095 status = acpi_ConvertBufferToInteger(&buf, number); 2096 AcpiOsFree(buf.Pointer); 2097 } 2098 } 2099 return (status); 2100 } 2101 2102 ACPI_STATUS 2103 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 2104 { 2105 ACPI_OBJECT *p; 2106 UINT8 *val; 2107 int i; 2108 2109 p = (ACPI_OBJECT *)bufp->Pointer; 2110 if (p->Type == ACPI_TYPE_INTEGER) { 2111 *number = p->Integer.Value; 2112 return (AE_OK); 2113 } 2114 if (p->Type != ACPI_TYPE_BUFFER) 2115 return (AE_TYPE); 2116 if (p->Buffer.Length > sizeof(int)) 2117 return (AE_BAD_DATA); 2118 2119 *number = 0; 2120 val = p->Buffer.Pointer; 2121 for (i = 0; i < p->Buffer.Length; i++) 2122 *number += val[i] << (i * 8); 2123 return (AE_OK); 2124 } 2125 2126 /* 2127 * Iterate over the elements of an a package object, calling the supplied 2128 * function for each element. 2129 * 2130 * XXX possible enhancement might be to abort traversal on error. 2131 */ 2132 ACPI_STATUS 2133 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 2134 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 2135 { 2136 ACPI_OBJECT *comp; 2137 int i; 2138 2139 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 2140 return (AE_BAD_PARAMETER); 2141 2142 /* Iterate over components */ 2143 i = 0; 2144 comp = pkg->Package.Elements; 2145 for (; i < pkg->Package.Count; i++, comp++) 2146 func(comp, arg); 2147 2148 return (AE_OK); 2149 } 2150 2151 /* 2152 * Find the (index)th resource object in a set. 2153 */ 2154 ACPI_STATUS 2155 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 2156 { 2157 ACPI_RESOURCE *rp; 2158 int i; 2159 2160 rp = (ACPI_RESOURCE *)buf->Pointer; 2161 i = index; 2162 while (i-- > 0) { 2163 /* Range check */ 2164 if (rp > (ACPI_RESOURCE *)((uint8_t *)buf->Pointer + buf->Length)) 2165 return (AE_BAD_PARAMETER); 2166 2167 /* Check for terminator */ 2168 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2169 return (AE_NOT_FOUND); 2170 rp = ACPI_NEXT_RESOURCE(rp); 2171 } 2172 if (resp != NULL) 2173 *resp = rp; 2174 2175 return (AE_OK); 2176 } 2177 2178 /* 2179 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 2180 * 2181 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 2182 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 2183 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 2184 * resources. 2185 */ 2186 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 2187 2188 ACPI_STATUS 2189 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 2190 { 2191 ACPI_RESOURCE *rp; 2192 void *newp; 2193 2194 /* Initialise the buffer if necessary. */ 2195 if (buf->Pointer == NULL) { 2196 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 2197 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 2198 return (AE_NO_MEMORY); 2199 rp = (ACPI_RESOURCE *)buf->Pointer; 2200 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2201 rp->Length = ACPI_RS_SIZE_MIN; 2202 } 2203 if (res == NULL) 2204 return (AE_OK); 2205 2206 /* 2207 * Scan the current buffer looking for the terminator. 2208 * This will either find the terminator or hit the end 2209 * of the buffer and return an error. 2210 */ 2211 rp = (ACPI_RESOURCE *)buf->Pointer; 2212 for (;;) { 2213 /* Range check, don't go outside the buffer */ 2214 if (rp >= (ACPI_RESOURCE *)((uint8_t *)buf->Pointer + buf->Length)) 2215 return (AE_BAD_PARAMETER); 2216 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2217 break; 2218 rp = ACPI_NEXT_RESOURCE(rp); 2219 } 2220 2221 /* 2222 * Check the size of the buffer and expand if required. 2223 * 2224 * Required size is: 2225 * size of existing resources before terminator + 2226 * size of new resource and header + 2227 * size of terminator. 2228 * 2229 * Note that this loop should really only run once, unless 2230 * for some reason we are stuffing a *really* huge resource. 2231 */ 2232 while ((((uint8_t *)rp - (uint8_t *)buf->Pointer) + 2233 res->Length + ACPI_RS_SIZE_NO_DATA + 2234 ACPI_RS_SIZE_MIN) >= buf->Length) { 2235 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 2236 return (AE_NO_MEMORY); 2237 bcopy(buf->Pointer, newp, buf->Length); 2238 rp = (ACPI_RESOURCE *)((uint8_t *)newp + 2239 ((uint8_t *)rp - (uint8_t *)buf->Pointer)); 2240 AcpiOsFree(buf->Pointer); 2241 buf->Pointer = newp; 2242 buf->Length += buf->Length; 2243 } 2244 2245 /* Insert the new resource. */ 2246 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA); 2247 2248 /* And add the terminator. */ 2249 rp = ACPI_NEXT_RESOURCE(rp); 2250 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2251 rp->Length = ACPI_RS_SIZE_MIN; 2252 2253 return (AE_OK); 2254 } 2255 2256 /* 2257 * Set interrupt model. 2258 */ 2259 ACPI_STATUS 2260 acpi_SetIntrModel(int model) 2261 { 2262 2263 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 2264 } 2265 2266 /* 2267 * DEPRECATED. This interface has serious deficiencies and will be 2268 * removed. 2269 * 2270 * Immediately enter the sleep state. In the old model, acpiconf(8) ran 2271 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this. 2272 */ 2273 ACPI_STATUS 2274 acpi_SetSleepState(struct acpi_softc *sc, int state) 2275 { 2276 static int once; 2277 2278 if (!once) { 2279 device_printf(sc->acpi_dev, 2280 "warning: acpi_SetSleepState() deprecated, need to update your software\n"); 2281 once = 1; 2282 } 2283 return (acpi_EnterSleepState(sc, state)); 2284 } 2285 2286 static void 2287 acpi_sleep_force(void *arg) 2288 { 2289 struct acpi_softc *sc; 2290 2291 sc = arg; 2292 device_printf(sc->acpi_dev, 2293 "suspend request timed out, forcing sleep now\n"); 2294 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2295 device_printf(sc->acpi_dev, "force sleep state S%d failed\n", 2296 sc->acpi_next_sstate); 2297 } 2298 2299 /* 2300 * Request that the system enter the given suspend state. All /dev/apm 2301 * devices and devd(8) will be notified. Userland then has a chance to 2302 * save state and acknowledge the request. The system sleeps once all 2303 * acks are in. 2304 */ 2305 int 2306 acpi_ReqSleepState(struct acpi_softc *sc, int state) 2307 { 2308 #ifdef notyet 2309 struct apm_clone_data *clone; 2310 #endif 2311 2312 if (state < ACPI_STATE_S1 || state > ACPI_STATE_S5) 2313 return (EINVAL); 2314 2315 /* S5 (soft-off) should be entered directly with no waiting. */ 2316 if (state == ACPI_STATE_S5) { 2317 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, state))) 2318 return (0); 2319 else 2320 return (ENXIO); 2321 } 2322 2323 /* This platform does not support acpi suspend/resume. */ 2324 return (EOPNOTSUPP); 2325 2326 /* If a suspend request is already in progress, just return. */ 2327 ACPI_LOCK(acpi); 2328 if (sc->acpi_next_sstate != 0) { 2329 ACPI_UNLOCK(acpi); 2330 return (0); 2331 } 2332 2333 /* Record the pending state and notify all apm devices. */ 2334 sc->acpi_next_sstate = state; 2335 #if 0 2336 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2337 clone->notify_status = APM_EV_NONE; 2338 if ((clone->flags & ACPI_EVF_DEVD) == 0) { 2339 KNOTE(&clone->sel_read.si_note, 0); 2340 } 2341 } 2342 #endif 2343 2344 /* If devd(8) is not running, immediately enter the sleep state. */ 2345 if (devctl_process_running() == FALSE) { 2346 ACPI_UNLOCK(acpi); 2347 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) { 2348 return (0); 2349 } else { 2350 return (ENXIO); 2351 } 2352 } 2353 2354 /* Now notify devd(8) also. */ 2355 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state); 2356 2357 /* 2358 * Set a timeout to fire if userland doesn't ack the suspend request 2359 * in time. This way we still eventually go to sleep if we were 2360 * overheating or running low on battery, even if userland is hung. 2361 * We cancel this timeout once all userland acks are in or the 2362 * suspend request is aborted. 2363 */ 2364 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc); 2365 ACPI_UNLOCK(acpi); 2366 return (0); 2367 } 2368 2369 /* 2370 * Acknowledge (or reject) a pending sleep state. The caller has 2371 * prepared for suspend and is now ready for it to proceed. If the 2372 * error argument is non-zero, it indicates suspend should be cancelled 2373 * and gives an errno value describing why. Once all votes are in, 2374 * we suspend the system. 2375 */ 2376 int 2377 acpi_AckSleepState(struct apm_clone_data *clone, int error) 2378 { 2379 struct acpi_softc *sc; 2380 int ret, sleeping; 2381 2382 /* This platform does not support acpi suspend/resume. */ 2383 return (EOPNOTSUPP); 2384 2385 /* If no pending sleep state, return an error. */ 2386 ACPI_LOCK(acpi); 2387 sc = clone->acpi_sc; 2388 if (sc->acpi_next_sstate == 0) { 2389 ACPI_UNLOCK(acpi); 2390 return (ENXIO); 2391 } 2392 2393 /* Caller wants to abort suspend process. */ 2394 if (error) { 2395 sc->acpi_next_sstate = 0; 2396 callout_stop(&sc->susp_force_to); 2397 device_printf(sc->acpi_dev, 2398 "listener on %s cancelled the pending suspend\n", 2399 devtoname(clone->cdev)); 2400 ACPI_UNLOCK(acpi); 2401 return (0); 2402 } 2403 2404 /* 2405 * Mark this device as acking the suspend request. Then, walk through 2406 * all devices, seeing if they agree yet. We only count devices that 2407 * are writable since read-only devices couldn't ack the request. 2408 */ 2409 clone->notify_status = APM_EV_ACKED; 2410 sleeping = TRUE; 2411 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2412 if ((clone->flags & ACPI_EVF_WRITE) != 0 && 2413 clone->notify_status != APM_EV_ACKED) { 2414 sleeping = FALSE; 2415 break; 2416 } 2417 } 2418 2419 /* If all devices have voted "yes", we will suspend now. */ 2420 if (sleeping) 2421 callout_stop(&sc->susp_force_to); 2422 ACPI_UNLOCK(acpi); 2423 ret = 0; 2424 if (sleeping) { 2425 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2426 ret = ENODEV; 2427 } 2428 2429 return (ret); 2430 } 2431 2432 static void 2433 acpi_sleep_enable(void *arg) 2434 { 2435 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0; 2436 } 2437 2438 enum acpi_sleep_state { 2439 ACPI_SS_NONE, 2440 ACPI_SS_GPE_SET, 2441 ACPI_SS_DEV_SUSPEND, 2442 ACPI_SS_SLP_PREP, 2443 ACPI_SS_SLEPT, 2444 }; 2445 2446 /* 2447 * Enter the desired system sleep state. 2448 * 2449 * Currently we support S1-S5 but S4 is only S4BIOS 2450 */ 2451 static ACPI_STATUS 2452 acpi_EnterSleepState(struct acpi_softc *sc, int state) 2453 { 2454 ACPI_STATUS status; 2455 UINT8 TypeA; 2456 UINT8 TypeB; 2457 enum acpi_sleep_state slp_state; 2458 2459 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2460 2461 /* Re-entry once we're suspending is not allowed. */ 2462 status = AE_OK; 2463 ACPI_LOCK(acpi); 2464 if (sc->acpi_sleep_disabled) { 2465 ACPI_UNLOCK(acpi); 2466 device_printf(sc->acpi_dev, 2467 "suspend request ignored (not ready yet)\n"); 2468 return (AE_ERROR); 2469 } 2470 sc->acpi_sleep_disabled = 1; 2471 ACPI_UNLOCK(acpi); 2472 2473 /* 2474 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE 2475 * drivers need this. 2476 */ 2477 //get_mplock(); 2478 slp_state = ACPI_SS_NONE; 2479 switch (state) { 2480 case ACPI_STATE_S1: 2481 case ACPI_STATE_S2: 2482 case ACPI_STATE_S3: 2483 case ACPI_STATE_S4: 2484 status = AcpiGetSleepTypeData(state, &TypeA, &TypeB); 2485 if (status == AE_NOT_FOUND) { 2486 device_printf(sc->acpi_dev, 2487 "Sleep state S%d not supported by BIOS\n", state); 2488 break; 2489 } else if (ACPI_FAILURE(status)) { 2490 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n", 2491 AcpiFormatException(status)); 2492 break; 2493 } 2494 2495 sc->acpi_sstate = state; 2496 2497 /* Enable any GPEs as appropriate and requested by the user. */ 2498 acpi_wake_prep_walk(state); 2499 slp_state = ACPI_SS_GPE_SET; 2500 2501 /* 2502 * Inform all devices that we are going to sleep. If at least one 2503 * device fails, DEVICE_SUSPEND() automatically resumes the tree. 2504 * 2505 * XXX Note that a better two-pass approach with a 'veto' pass 2506 * followed by a "real thing" pass would be better, but the current 2507 * bus interface does not provide for this. 2508 */ 2509 if (DEVICE_SUSPEND(root_bus) != 0) { 2510 device_printf(sc->acpi_dev, "device_suspend failed\n"); 2511 break; 2512 } 2513 slp_state = ACPI_SS_DEV_SUSPEND; 2514 2515 /* If testing device suspend only, back out of everything here. */ 2516 if (acpi_susp_bounce) 2517 break; 2518 2519 status = AcpiEnterSleepStatePrep(state); 2520 if (ACPI_FAILURE(status)) { 2521 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2522 AcpiFormatException(status)); 2523 break; 2524 } 2525 slp_state = ACPI_SS_SLP_PREP; 2526 2527 if (sc->acpi_sleep_delay > 0) 2528 DELAY(sc->acpi_sleep_delay * 1000000); 2529 2530 if (state != ACPI_STATE_S1) { 2531 acpi_sleep_machdep(sc, state); 2532 2533 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 2534 if (state == ACPI_STATE_S4) 2535 AcpiEnable(); 2536 } else { 2537 ACPI_DISABLE_IRQS(); 2538 status = AcpiEnterSleepState(state); 2539 if (ACPI_FAILURE(status)) { 2540 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 2541 AcpiFormatException(status)); 2542 break; 2543 } 2544 } 2545 slp_state = ACPI_SS_SLEPT; 2546 break; 2547 case ACPI_STATE_S5: 2548 /* 2549 * Shut down cleanly and power off. This will call us back through the 2550 * shutdown handlers. 2551 */ 2552 shutdown_nice(RB_POWEROFF); 2553 break; 2554 case ACPI_STATE_S0: 2555 default: 2556 status = AE_BAD_PARAMETER; 2557 break; 2558 } 2559 2560 /* 2561 * Back out state according to how far along we got in the suspend 2562 * process. This handles both the error and success cases. 2563 */ 2564 sc->acpi_next_sstate = 0; 2565 if (slp_state >= ACPI_SS_GPE_SET) { 2566 acpi_wake_prep_walk(state); 2567 sc->acpi_sstate = ACPI_STATE_S0; 2568 } 2569 if (slp_state >= ACPI_SS_SLP_PREP) 2570 AcpiLeaveSleepState(state); 2571 if (slp_state >= ACPI_SS_DEV_SUSPEND) 2572 DEVICE_RESUME(root_bus); 2573 if (slp_state >= ACPI_SS_SLEPT) 2574 acpi_enable_fixed_events(sc); 2575 2576 /* Allow another sleep request after a while. */ 2577 /* XXX: needs timeout */ 2578 if (state != ACPI_STATE_S5) 2579 acpi_sleep_enable(sc); 2580 2581 /* Run /etc/rc.resume after we are back. */ 2582 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state); 2583 2584 //rel_mplock(); 2585 return_ACPI_STATUS (status); 2586 } 2587 2588 /* Enable or disable the device's GPE. */ 2589 int 2590 acpi_wake_set_enable(device_t dev, int enable) 2591 { 2592 struct acpi_prw_data prw; 2593 ACPI_STATUS status; 2594 int flags; 2595 2596 /* Make sure the device supports waking the system and get the GPE. */ 2597 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 2598 return (ENXIO); 2599 2600 flags = acpi_get_flags(dev); 2601 if (enable) { 2602 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 2603 ACPI_GPE_ENABLE); 2604 if (ACPI_FAILURE(status)) { 2605 device_printf(dev, "enable wake failed\n"); 2606 return (ENXIO); 2607 } 2608 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); 2609 } else { 2610 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 2611 ACPI_GPE_DISABLE); 2612 if (ACPI_FAILURE(status)) { 2613 device_printf(dev, "disable wake failed\n"); 2614 return (ENXIO); 2615 } 2616 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); 2617 } 2618 2619 return (0); 2620 } 2621 2622 static int 2623 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate) 2624 { 2625 struct acpi_prw_data prw; 2626 device_t dev; 2627 2628 /* Check that this is a wake-capable device and get its GPE. */ 2629 if (acpi_parse_prw(handle, &prw) != 0) 2630 return (ENXIO); 2631 dev = acpi_get_device(handle); 2632 2633 /* 2634 * The destination sleep state must be less than (i.e., higher power) 2635 * or equal to the value specified by _PRW. If this GPE cannot be 2636 * enabled for the next sleep state, then disable it. If it can and 2637 * the user requested it be enabled, turn on any required power resources 2638 * and set _PSW. 2639 */ 2640 if (sstate > prw.lowest_wake) { 2641 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_DISABLE); 2642 if (bootverbose) 2643 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n", 2644 acpi_name(handle), sstate); 2645 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) { 2646 acpi_pwr_wake_enable(handle, 1); 2647 acpi_SetInteger(handle, "_PSW", 1); 2648 if (bootverbose) 2649 device_printf(dev, "wake_prep enabled for %s (S%d)\n", 2650 acpi_name(handle), sstate); 2651 } 2652 2653 return (0); 2654 } 2655 2656 static int 2657 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate) 2658 { 2659 struct acpi_prw_data prw; 2660 device_t dev; 2661 2662 /* 2663 * Check that this is a wake-capable device and get its GPE. Return 2664 * now if the user didn't enable this device for wake. 2665 */ 2666 if (acpi_parse_prw(handle, &prw) != 0) 2667 return (ENXIO); 2668 dev = acpi_get_device(handle); 2669 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0) 2670 return (0); 2671 2672 /* 2673 * If this GPE couldn't be enabled for the previous sleep state, it was 2674 * disabled before going to sleep so re-enable it. If it was enabled, 2675 * clear _PSW and turn off any power resources it used. 2676 */ 2677 if (sstate > prw.lowest_wake) { 2678 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_ENABLE); 2679 if (bootverbose) 2680 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle)); 2681 } else { 2682 acpi_SetInteger(handle, "_PSW", 0); 2683 acpi_pwr_wake_enable(handle, 0); 2684 if (bootverbose) 2685 device_printf(dev, "run_prep cleaned up for %s\n", 2686 acpi_name(handle)); 2687 } 2688 2689 return (0); 2690 } 2691 2692 static ACPI_STATUS 2693 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 2694 { 2695 int sstate; 2696 2697 /* If suspending, run the sleep prep function, otherwise wake. */ 2698 sstate = *(int *)context; 2699 if (AcpiGbl_SystemAwakeAndRunning) 2700 acpi_wake_sleep_prep(handle, sstate); 2701 else 2702 acpi_wake_run_prep(handle, sstate); 2703 return (AE_OK); 2704 } 2705 2706 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */ 2707 static int 2708 acpi_wake_prep_walk(int sstate) 2709 { 2710 ACPI_HANDLE sb_handle; 2711 2712 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) { 2713 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100, 2714 acpi_wake_prep, NULL, &sstate, NULL); 2715 } 2716 return (0); 2717 } 2718 2719 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */ 2720 static int 2721 acpi_wake_sysctl_walk(device_t dev) 2722 { 2723 #ifdef notyet 2724 int error, i, numdevs; 2725 device_t *devlist; 2726 device_t child; 2727 ACPI_STATUS status; 2728 2729 error = device_get_children(dev, &devlist, &numdevs); 2730 if (error != 0 || numdevs == 0) { 2731 if (numdevs == 0) 2732 kfree(devlist, M_TEMP); 2733 return (error); 2734 } 2735 for (i = 0; i < numdevs; i++) { 2736 child = devlist[i]; 2737 acpi_wake_sysctl_walk(child); 2738 if (!device_is_attached(child)) 2739 continue; 2740 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL); 2741 if (ACPI_SUCCESS(status)) { 2742 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child), 2743 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO, 2744 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0, 2745 acpi_wake_set_sysctl, "I", "Device set to wake the system"); 2746 } 2747 } 2748 kfree(devlist, M_TEMP); 2749 #endif 2750 2751 return (0); 2752 } 2753 2754 #ifdef notyet 2755 /* Enable or disable wake from userland. */ 2756 static int 2757 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS) 2758 { 2759 int enable, error; 2760 device_t dev; 2761 2762 dev = (device_t)arg1; 2763 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0; 2764 2765 error = sysctl_handle_int(oidp, &enable, 0, req); 2766 if (error != 0 || req->newptr == NULL) 2767 return (error); 2768 if (enable != 0 && enable != 1) 2769 return (EINVAL); 2770 2771 return (acpi_wake_set_enable(dev, enable)); 2772 } 2773 #endif 2774 2775 /* Parse a device's _PRW into a structure. */ 2776 int 2777 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) 2778 { 2779 ACPI_STATUS status; 2780 ACPI_BUFFER prw_buffer; 2781 ACPI_OBJECT *res, *res2; 2782 int error, i, power_count; 2783 2784 if (h == NULL || prw == NULL) 2785 return (EINVAL); 2786 2787 /* 2788 * The _PRW object (7.2.9) is only required for devices that have the 2789 * ability to wake the system from a sleeping state. 2790 */ 2791 error = EINVAL; 2792 prw_buffer.Pointer = NULL; 2793 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 2794 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 2795 if (ACPI_FAILURE(status)) 2796 return (ENOENT); 2797 res = (ACPI_OBJECT *)prw_buffer.Pointer; 2798 if (res == NULL) 2799 return (ENOENT); 2800 if (!ACPI_PKG_VALID(res, 2)) 2801 goto out; 2802 2803 /* 2804 * Element 1 of the _PRW object: 2805 * The lowest power system sleeping state that can be entered while still 2806 * providing wake functionality. The sleeping state being entered must 2807 * be less than (i.e., higher power) or equal to this value. 2808 */ 2809 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) 2810 goto out; 2811 2812 /* 2813 * Element 0 of the _PRW object: 2814 */ 2815 switch (res->Package.Elements[0].Type) { 2816 case ACPI_TYPE_INTEGER: 2817 /* 2818 * If the data type of this package element is numeric, then this 2819 * _PRW package element is the bit index in the GPEx_EN, in the 2820 * GPE blocks described in the FADT, of the enable bit that is 2821 * enabled for the wake event. 2822 */ 2823 prw->gpe_handle = NULL; 2824 prw->gpe_bit = res->Package.Elements[0].Integer.Value; 2825 error = 0; 2826 break; 2827 case ACPI_TYPE_PACKAGE: 2828 /* 2829 * If the data type of this package element is a package, then this 2830 * _PRW package element is itself a package containing two 2831 * elements. The first is an object reference to the GPE Block 2832 * device that contains the GPE that will be triggered by the wake 2833 * event. The second element is numeric and it contains the bit 2834 * index in the GPEx_EN, in the GPE Block referenced by the 2835 * first element in the package, of the enable bit that is enabled for 2836 * the wake event. 2837 * 2838 * For example, if this field is a package then it is of the form: 2839 * Package() {\_SB.PCI0.ISA.GPE, 2} 2840 */ 2841 res2 = &res->Package.Elements[0]; 2842 if (!ACPI_PKG_VALID(res2, 2)) 2843 goto out; 2844 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 2845 if (prw->gpe_handle == NULL) 2846 goto out; 2847 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) 2848 goto out; 2849 error = 0; 2850 break; 2851 default: 2852 goto out; 2853 } 2854 2855 /* Elements 2 to N of the _PRW object are power resources. */ 2856 power_count = res->Package.Count - 2; 2857 if (power_count > ACPI_PRW_MAX_POWERRES) { 2858 kprintf("ACPI device %s has too many power resources\n", acpi_name(h)); 2859 power_count = 0; 2860 } 2861 prw->power_res_count = power_count; 2862 for (i = 0; i < power_count; i++) 2863 prw->power_res[i] = res->Package.Elements[i]; 2864 2865 out: 2866 if (prw_buffer.Pointer != NULL) 2867 AcpiOsFree(prw_buffer.Pointer); 2868 return (error); 2869 } 2870 2871 /* 2872 * ACPI Event Handlers 2873 */ 2874 2875 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 2876 2877 static void 2878 acpi_system_eventhandler_sleep(void *arg, int state) 2879 { 2880 struct acpi_softc *sc; 2881 int ret; 2882 2883 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2884 2885 sc = arg; 2886 2887 /* Check if button action is disabled. */ 2888 if (state == ACPI_S_STATES_MAX + 1) 2889 return; 2890 2891 /* Request that the system prepare to enter the given suspend state. */ 2892 ret = acpi_ReqSleepState((struct acpi_softc *)arg, state); 2893 if (ret != 0) 2894 device_printf(sc->acpi_dev, 2895 "request to enter state S%d failed (err %d)\n", state, ret); 2896 2897 return_VOID; 2898 } 2899 2900 static void 2901 acpi_system_eventhandler_wakeup(void *arg, int state) 2902 { 2903 2904 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2905 2906 /* Currently, nothing to do for wakeup. */ 2907 2908 return_VOID; 2909 } 2910 2911 /* 2912 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 2913 */ 2914 UINT32 2915 acpi_event_power_button_sleep(void *context) 2916 { 2917 struct acpi_softc *sc = (struct acpi_softc *)context; 2918 2919 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2920 2921 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 2922 2923 return_VALUE (ACPI_INTERRUPT_HANDLED); 2924 } 2925 2926 UINT32 2927 acpi_event_power_button_wake(void *context) 2928 { 2929 struct acpi_softc *sc = (struct acpi_softc *)context; 2930 2931 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2932 2933 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 2934 2935 return_VALUE (ACPI_INTERRUPT_HANDLED); 2936 } 2937 2938 UINT32 2939 acpi_event_sleep_button_sleep(void *context) 2940 { 2941 struct acpi_softc *sc = (struct acpi_softc *)context; 2942 2943 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2944 2945 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 2946 2947 return_VALUE (ACPI_INTERRUPT_HANDLED); 2948 } 2949 2950 UINT32 2951 acpi_event_sleep_button_wake(void *context) 2952 { 2953 struct acpi_softc *sc = (struct acpi_softc *)context; 2954 2955 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2956 2957 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 2958 2959 return_VALUE (ACPI_INTERRUPT_HANDLED); 2960 } 2961 2962 /* 2963 * XXX This static buffer is suboptimal. There is no locking so only 2964 * use this for single-threaded callers. 2965 */ 2966 char * 2967 acpi_name(ACPI_HANDLE handle) 2968 { 2969 ACPI_BUFFER buf; 2970 static char data[256]; 2971 2972 buf.Length = sizeof(data); 2973 buf.Pointer = data; 2974 2975 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf))) 2976 return (data); 2977 return ("(unknown)"); 2978 } 2979 2980 /* 2981 * Debugging/bug-avoidance. Avoid trying to fetch info on various 2982 * parts of the namespace. 2983 */ 2984 int 2985 acpi_avoid(ACPI_HANDLE handle) 2986 { 2987 char *cp, *env, *np; 2988 int len; 2989 2990 np = acpi_name(handle); 2991 if (*np == '\\') 2992 np++; 2993 if ((env = kgetenv("debug.acpi.avoid")) == NULL) 2994 return (0); 2995 2996 /* Scan the avoid list checking for a match */ 2997 cp = env; 2998 for (;;) { 2999 while (*cp != 0 && isspace(*cp)) 3000 cp++; 3001 if (*cp == 0) 3002 break; 3003 len = 0; 3004 while (cp[len] != 0 && !isspace(cp[len])) 3005 len++; 3006 if (!strncmp(cp, np, len)) { 3007 kfreeenv(env); 3008 return(1); 3009 } 3010 cp += len; 3011 } 3012 kfreeenv(env); 3013 3014 return (0); 3015 } 3016 3017 /* 3018 * Debugging/bug-avoidance. Disable ACPI subsystem components. 3019 */ 3020 int 3021 acpi_disabled(char *subsys) 3022 { 3023 char *cp, *env; 3024 int len; 3025 3026 if ((env = kgetenv("debug.acpi.disabled")) == NULL) 3027 return (0); 3028 if (strcmp(env, "all") == 0) { 3029 kfreeenv(env); 3030 return (1); 3031 } 3032 3033 /* Scan the disable list, checking for a match. */ 3034 cp = env; 3035 for (;;) { 3036 while (*cp != '\0' && isspace(*cp)) 3037 cp++; 3038 if (*cp == '\0') 3039 break; 3040 len = 0; 3041 while (cp[len] != '\0' && !isspace(cp[len])) 3042 len++; 3043 if (strncmp(cp, subsys, len) == 0) { 3044 kfreeenv(env); 3045 return (1); 3046 } 3047 cp += len; 3048 } 3049 kfreeenv(env); 3050 3051 return (0); 3052 } 3053 3054 /* 3055 * Debugging/bug-avoidance. Enable ACPI subsystem components. Most 3056 * components are enabled by default. The ones that are not have to be 3057 * enabled via debug.acpi.enabled. 3058 */ 3059 int 3060 acpi_enabled(char *subsys) 3061 { 3062 char *cp, *env; 3063 int len; 3064 3065 if ((env = kgetenv("debug.acpi.enabled")) == NULL) 3066 return (0); 3067 if (strcmp(env, "all") == 0) { 3068 kfreeenv(env); 3069 return (1); 3070 } 3071 3072 /* Scan the enable list, checking for a match. */ 3073 cp = env; 3074 for (;;) { 3075 while (*cp != '\0' && isspace(*cp)) 3076 cp++; 3077 if (*cp == '\0') 3078 break; 3079 len = 0; 3080 while (cp[len] != '\0' && !isspace(cp[len])) 3081 len++; 3082 if (strncmp(cp, subsys, len) == 0) { 3083 kfreeenv(env); 3084 return (1); 3085 } 3086 cp += len; 3087 } 3088 kfreeenv(env); 3089 3090 return (0); 3091 } 3092 3093 /* 3094 * Control interface. 3095 * 3096 * We multiplex ioctls for all participating ACPI devices here. Individual 3097 * drivers wanting to be accessible via /dev/acpi should use the 3098 * register/deregister interface to make their handlers visible. 3099 */ 3100 struct acpi_ioctl_hook 3101 { 3102 TAILQ_ENTRY(acpi_ioctl_hook) link; 3103 u_long cmd; 3104 acpi_ioctl_fn fn; 3105 void *arg; 3106 }; 3107 3108 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 3109 static int acpi_ioctl_hooks_initted; 3110 3111 int 3112 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 3113 { 3114 struct acpi_ioctl_hook *hp; 3115 3116 if ((hp = kmalloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 3117 return (ENOMEM); 3118 hp->cmd = cmd; 3119 hp->fn = fn; 3120 hp->arg = arg; 3121 3122 ACPI_LOCK(acpi); 3123 if (acpi_ioctl_hooks_initted == 0) { 3124 TAILQ_INIT(&acpi_ioctl_hooks); 3125 acpi_ioctl_hooks_initted = 1; 3126 } 3127 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 3128 ACPI_UNLOCK(acpi); 3129 3130 return (0); 3131 } 3132 3133 void 3134 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 3135 { 3136 struct acpi_ioctl_hook *hp; 3137 3138 ACPI_LOCK(acpi); 3139 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 3140 if (hp->cmd == cmd && hp->fn == fn) 3141 break; 3142 3143 if (hp != NULL) { 3144 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 3145 kfree(hp, M_ACPIDEV); 3146 } 3147 ACPI_UNLOCK(acpi); 3148 } 3149 3150 static int 3151 acpiopen(struct dev_open_args *ap) 3152 { 3153 return (0); 3154 } 3155 3156 static int 3157 acpiclose(struct dev_close_args *ap) 3158 { 3159 return (0); 3160 } 3161 3162 static int 3163 acpiioctl(struct dev_ioctl_args *ap) 3164 { 3165 struct acpi_softc *sc; 3166 struct acpi_ioctl_hook *hp; 3167 int error, state; 3168 3169 error = 0; 3170 hp = NULL; 3171 sc = ap->a_head.a_dev->si_drv1; 3172 3173 /* 3174 * Scan the list of registered ioctls, looking for handlers. 3175 */ 3176 ACPI_LOCK(acpi); 3177 if (acpi_ioctl_hooks_initted) 3178 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 3179 if (hp->cmd == ap->a_cmd) 3180 break; 3181 } 3182 ACPI_UNLOCK(acpi); 3183 if (hp) 3184 return (hp->fn(ap->a_cmd, ap->a_data, hp->arg)); 3185 3186 /* 3187 * Core ioctls are not permitted for non-writable user. 3188 * Currently, other ioctls just fetch information. 3189 * Not changing system behavior. 3190 */ 3191 if ((ap->a_fflag & FWRITE) == 0) 3192 return (EPERM); 3193 3194 /* Core system ioctls. */ 3195 switch (ap->a_cmd) { 3196 case ACPIIO_REQSLPSTATE: 3197 state = *(int *)ap->a_data; 3198 if (state != ACPI_STATE_S5) 3199 error = acpi_ReqSleepState(sc, state); 3200 else { 3201 device_printf(sc->acpi_dev, 3202 "power off via acpi ioctl not supported\n"); 3203 error = ENXIO; 3204 } 3205 break; 3206 case ACPIIO_ACKSLPSTATE: 3207 error = EOPNOTSUPP; 3208 #if 0 /* notyet */ 3209 error = *(int *)ap->a_data; 3210 error = acpi_AckSleepState(sc->acpi_clone, error); 3211 #endif 3212 break; 3213 case ACPIIO_SETSLPSTATE: /* DEPRECATED */ 3214 error = EINVAL; 3215 state = *(int *)ap->a_data; 3216 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 3217 if (ACPI_SUCCESS(acpi_SetSleepState(sc, state))) 3218 error = 0; 3219 break; 3220 case ACPIIO_DO_MCALL: 3221 if (acpi_allow_mcall == 1) { 3222 struct acpi_mcall_ioctl_arg *params; 3223 ACPI_BUFFER result = { ACPI_ALLOCATE_BUFFER, NULL }; 3224 ACPI_OBJECT *resobj; 3225 3226 error = EINVAL; 3227 params = (struct acpi_mcall_ioctl_arg *)ap->a_data; 3228 params->retval = AcpiEvaluateObject(NULL, params->path, 3229 ¶ms->args, &result); 3230 if (ACPI_SUCCESS(params->retval) && result.Pointer != NULL && 3231 params->result.Pointer != NULL) { 3232 params->result.Length = min(params->result.Length, 3233 result.Length); 3234 copyout(result.Pointer, params->result.Pointer, 3235 params->result.Length); 3236 params->reslen = result.Length; 3237 if (result.Length >= sizeof(ACPI_OBJECT)) { 3238 resobj = (ACPI_OBJECT *)params->result.Pointer; 3239 switch (resobj->Type) { 3240 case ACPI_TYPE_STRING: 3241 resobj->String.Pointer = (char *) 3242 ((UINT8 *)(resobj->String.Pointer) - 3243 (UINT8 *)result.Pointer + 3244 (UINT8 *)resobj); 3245 break; 3246 case ACPI_TYPE_BUFFER: 3247 resobj->Buffer.Pointer -= (UINT8 *)result.Pointer - 3248 (UINT8 *)resobj; 3249 break; 3250 } 3251 } 3252 error = 0; 3253 } 3254 if (result.Pointer != NULL) 3255 AcpiOsFree(result.Pointer); 3256 } else { 3257 device_printf(sc->acpi_dev, 3258 "debug.acpi.allow_method_calls must be set\n"); 3259 error = ENXIO; 3260 } 3261 break; 3262 default: 3263 error = ENXIO; 3264 break; 3265 } 3266 return (error); 3267 } 3268 3269 static int 3270 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3271 { 3272 int error; 3273 struct sbuf sb; 3274 UINT8 state, TypeA, TypeB; 3275 3276 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND); 3277 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX + 1; state++) 3278 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) 3279 sbuf_printf(&sb, "S%d ", state); 3280 sbuf_trim(&sb); 3281 sbuf_finish(&sb); 3282 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 3283 sbuf_delete(&sb); 3284 return (error); 3285 } 3286 3287 static int 3288 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3289 { 3290 char sleep_state[10]; 3291 int error; 3292 u_int new_state, old_state; 3293 3294 old_state = *(u_int *)oidp->oid_arg1; 3295 if (old_state > ACPI_S_STATES_MAX + 1) 3296 strlcpy(sleep_state, "unknown", sizeof(sleep_state)); 3297 else 3298 strlcpy(sleep_state, sleep_state_names[old_state], sizeof(sleep_state)); 3299 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 3300 if (error == 0 && req->newptr != NULL) { 3301 new_state = ACPI_STATE_S0; 3302 for (; new_state <= ACPI_S_STATES_MAX + 1; new_state++) 3303 if (strcmp(sleep_state, sleep_state_names[new_state]) == 0) 3304 break; 3305 if (new_state <= ACPI_S_STATES_MAX + 1) { 3306 if (new_state != old_state) 3307 *(u_int *)oidp->oid_arg1 = new_state; 3308 } else 3309 error = EINVAL; 3310 } 3311 3312 return (error); 3313 } 3314 3315 /* Inform devctl(4) when we receive a Notify. */ 3316 void 3317 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 3318 { 3319 char notify_buf[16]; 3320 ACPI_BUFFER handle_buf; 3321 ACPI_STATUS status; 3322 3323 if (subsystem == NULL) 3324 return; 3325 3326 handle_buf.Pointer = NULL; 3327 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 3328 status = AcpiNsHandleToPathname(h, &handle_buf, FALSE); 3329 if (ACPI_FAILURE(status)) 3330 return; 3331 ksnprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 3332 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 3333 AcpiOsFree(handle_buf.Pointer); 3334 } 3335 3336 #ifdef ACPI_DEBUG 3337 /* 3338 * Support for parsing debug options from the kernel environment. 3339 * 3340 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 3341 * by specifying the names of the bits in the debug.acpi.layer and 3342 * debug.acpi.level environment variables. Bits may be unset by 3343 * prefixing the bit name with !. 3344 */ 3345 struct debugtag 3346 { 3347 char *name; 3348 UINT32 value; 3349 }; 3350 3351 static struct debugtag dbg_layer[] = { 3352 {"ACPI_UTILITIES", ACPI_UTILITIES}, 3353 {"ACPI_HARDWARE", ACPI_HARDWARE}, 3354 {"ACPI_EVENTS", ACPI_EVENTS}, 3355 {"ACPI_TABLES", ACPI_TABLES}, 3356 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 3357 {"ACPI_PARSER", ACPI_PARSER}, 3358 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 3359 {"ACPI_EXECUTER", ACPI_EXECUTER}, 3360 {"ACPI_RESOURCES", ACPI_RESOURCES}, 3361 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 3362 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 3363 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 3364 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 3365 3366 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 3367 {"ACPI_BATTERY", ACPI_BATTERY}, 3368 {"ACPI_BUS", ACPI_BUS}, 3369 {"ACPI_BUTTON", ACPI_BUTTON}, 3370 {"ACPI_EC", ACPI_EC}, 3371 {"ACPI_FAN", ACPI_FAN}, 3372 {"ACPI_POWERRES", ACPI_POWERRES}, 3373 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 3374 {"ACPI_THERMAL", ACPI_THERMAL}, 3375 {"ACPI_TIMER", ACPI_TIMER}, 3376 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 3377 {NULL, 0} 3378 }; 3379 3380 static struct debugtag dbg_level[] = { 3381 {"ACPI_LV_INIT", ACPI_LV_INIT}, 3382 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 3383 {"ACPI_LV_INFO", ACPI_LV_INFO}, 3384 {"ACPI_LV_REPAIR", ACPI_LV_REPAIR}, 3385 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 3386 3387 /* Trace verbosity level 1 [Standard Trace Level] */ 3388 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 3389 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 3390 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 3391 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 3392 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 3393 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 3394 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 3395 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 3396 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 3397 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 3398 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 3399 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 3400 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 3401 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 3402 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 3403 3404 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 3405 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 3406 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 3407 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 3408 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 3409 {"ACPI_LV_ALL", ACPI_LV_ALL}, 3410 3411 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 3412 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 3413 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 3414 {"ACPI_LV_IO", ACPI_LV_IO}, 3415 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 3416 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 3417 3418 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 3419 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 3420 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 3421 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 3422 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 3423 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 3424 {NULL, 0} 3425 }; 3426 3427 static void 3428 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 3429 { 3430 char *ep; 3431 int i, l; 3432 int set; 3433 3434 while (*cp) { 3435 if (isspace(*cp)) { 3436 cp++; 3437 continue; 3438 } 3439 ep = cp; 3440 while (*ep && !isspace(*ep)) 3441 ep++; 3442 if (*cp == '!') { 3443 set = 0; 3444 cp++; 3445 if (cp == ep) 3446 continue; 3447 } else { 3448 set = 1; 3449 } 3450 l = ep - cp; 3451 for (i = 0; tag[i].name != NULL; i++) { 3452 if (!strncmp(cp, tag[i].name, l)) { 3453 if (set) 3454 *flag |= tag[i].value; 3455 else 3456 *flag &= ~tag[i].value; 3457 } 3458 } 3459 cp = ep; 3460 } 3461 } 3462 3463 static void 3464 acpi_set_debugging(void *junk) 3465 { 3466 char *layer, *level; 3467 3468 if (cold) { 3469 AcpiDbgLayer = 0; 3470 AcpiDbgLevel = 0; 3471 } 3472 3473 layer = kgetenv("debug.acpi.layer"); 3474 level = kgetenv("debug.acpi.level"); 3475 if (layer == NULL && level == NULL) 3476 return; 3477 3478 kprintf("ACPI set debug"); 3479 if (layer != NULL) { 3480 if (strcmp("NONE", layer) != 0) 3481 kprintf(" layer '%s'", layer); 3482 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer); 3483 kfreeenv(layer); 3484 } 3485 if (level != NULL) { 3486 if (strcmp("NONE", level) != 0) 3487 kprintf(" level '%s'", level); 3488 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel); 3489 kfreeenv(level); 3490 } 3491 kprintf("\n"); 3492 } 3493 3494 SYSINIT(acpi_debugging, SI_BOOT1_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 3495 NULL); 3496 3497 static int 3498 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 3499 { 3500 int error, *dbg; 3501 struct debugtag *tag; 3502 struct sbuf sb; 3503 3504 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 3505 return (ENOMEM); 3506 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 3507 tag = &dbg_layer[0]; 3508 dbg = &AcpiDbgLayer; 3509 } else { 3510 tag = &dbg_level[0]; 3511 dbg = &AcpiDbgLevel; 3512 } 3513 3514 /* Get old values if this is a get request. */ 3515 ACPI_SERIAL_BEGIN(acpi); 3516 if (*dbg == 0) { 3517 sbuf_cpy(&sb, "NONE"); 3518 } else if (req->newptr == NULL) { 3519 for (; tag->name != NULL; tag++) { 3520 if ((*dbg & tag->value) == tag->value) 3521 sbuf_printf(&sb, "%s ", tag->name); 3522 } 3523 } 3524 sbuf_trim(&sb); 3525 sbuf_finish(&sb); 3526 3527 /* Copy out the old values to the user. */ 3528 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb)); 3529 sbuf_delete(&sb); 3530 3531 /* If the user is setting a string, parse it. */ 3532 if (error == 0 && req->newptr != NULL) { 3533 *dbg = 0; 3534 ksetenv((char *)oidp->oid_arg1, (char *)req->newptr); 3535 acpi_set_debugging(NULL); 3536 } 3537 ACPI_SERIAL_END(acpi); 3538 3539 return (error); 3540 } 3541 3542 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 3543 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 3544 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 3545 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 3546 #endif /* ACPI_DEBUG */ 3547 3548 static int 3549 acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS) 3550 { 3551 int error; 3552 int old; 3553 3554 old = acpi_debug_objects; 3555 error = sysctl_handle_int(oidp, &acpi_debug_objects, 0, req); 3556 if (error != 0 || req->newptr == NULL) 3557 return (error); 3558 if (old == acpi_debug_objects || (old && acpi_debug_objects)) 3559 return (0); 3560 3561 ACPI_SERIAL_BEGIN(acpi); 3562 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE; 3563 ACPI_SERIAL_END(acpi); 3564 3565 return (0); 3566 } 3567 3568 3569 static int 3570 acpi_parse_interfaces(char *str, struct acpi_interface *iface) 3571 { 3572 char *p; 3573 size_t len; 3574 int i, j; 3575 3576 p = str; 3577 while (isspace(*p) || *p == ',') 3578 p++; 3579 len = strlen(p); 3580 if (len == 0) 3581 return (0); 3582 p = kstrdup(p, M_TEMP); 3583 for (i = 0; i < len; i++) 3584 if (p[i] == ',') 3585 p[i] = '\0'; 3586 i = j = 0; 3587 while (i < len) 3588 if (isspace(p[i]) || p[i] == '\0') 3589 i++; 3590 else { 3591 i += strlen(p + i) + 1; 3592 j++; 3593 } 3594 if (j == 0) { 3595 kfree(p, M_TEMP); 3596 return (0); 3597 } 3598 iface->data = kmalloc(sizeof(*iface->data) * j, M_TEMP, M_WAITOK); 3599 iface->num = j; 3600 i = j = 0; 3601 while (i < len) 3602 if (isspace(p[i]) || p[i] == '\0') 3603 i++; 3604 else { 3605 iface->data[j] = p + i; 3606 i += strlen(p + i) + 1; 3607 j++; 3608 } 3609 3610 return (j); 3611 } 3612 3613 static void 3614 acpi_free_interfaces(struct acpi_interface *iface) 3615 { 3616 kfree(iface->data[0], M_TEMP); 3617 kfree(iface->data, M_TEMP); 3618 } 3619 3620 static void 3621 acpi_reset_interfaces(device_t dev) 3622 { 3623 struct acpi_interface list; 3624 ACPI_STATUS status; 3625 int i; 3626 3627 if (acpi_parse_interfaces(acpi_install_interface, &list) > 0) { 3628 for (i = 0; i < list.num; i++) { 3629 status = AcpiInstallInterface(list.data[i]); 3630 if (ACPI_FAILURE(status)) 3631 device_printf(dev, 3632 "failed to install _OSI(\"%s\"): %s\n", 3633 list.data[i], AcpiFormatException(status)); 3634 else if (bootverbose) 3635 device_printf(dev, "installed _OSI(\"%s\")\n", 3636 list.data[i]); 3637 } 3638 acpi_free_interfaces(&list); 3639 } 3640 if (acpi_parse_interfaces(acpi_remove_interface, &list) > 0) { 3641 for (i = 0; i < list.num; i++) { 3642 status = AcpiRemoveInterface(list.data[i]); 3643 if (ACPI_FAILURE(status)) 3644 device_printf(dev, 3645 "failed to remove _OSI(\"%s\"): %s\n", 3646 list.data[i], AcpiFormatException(status)); 3647 else if (bootverbose) 3648 device_printf(dev, "removed _OSI(\"%s\")\n", 3649 list.data[i]); 3650 } 3651 acpi_free_interfaces(&list); 3652 } 3653 } 3654 3655 static int 3656 acpi_pm_func(u_long cmd, void *arg, ...) 3657 { 3658 int state, acpi_state; 3659 int error; 3660 struct acpi_softc *sc; 3661 __va_list ap; 3662 3663 error = 0; 3664 switch (cmd) { 3665 case POWER_CMD_SUSPEND: 3666 sc = (struct acpi_softc *)arg; 3667 if (sc == NULL) { 3668 error = EINVAL; 3669 goto out; 3670 } 3671 3672 __va_start(ap, arg); 3673 state = __va_arg(ap, int); 3674 __va_end(ap); 3675 3676 switch (state) { 3677 case POWER_SLEEP_STATE_STANDBY: 3678 acpi_state = sc->acpi_standby_sx; 3679 break; 3680 case POWER_SLEEP_STATE_SUSPEND: 3681 acpi_state = sc->acpi_suspend_sx; 3682 break; 3683 case POWER_SLEEP_STATE_HIBERNATE: 3684 acpi_state = ACPI_STATE_S4; 3685 break; 3686 default: 3687 error = EINVAL; 3688 goto out; 3689 } 3690 3691 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state))) 3692 error = ENXIO; 3693 break; 3694 default: 3695 error = EINVAL; 3696 goto out; 3697 } 3698 3699 out: 3700 return (error); 3701 } 3702 3703 static void 3704 acpi_pm_register(void *arg) 3705 { 3706 if (!cold || resource_disabled("acpi", 0)) 3707 return; 3708 3709 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 3710 } 3711 3712 SYSINIT(power, SI_BOOT2_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 3713