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, D_MPSAFE }, 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 struct lwkt_token acpi_token = LWKT_TOKEN_INITIALIZER(acpi_token); 96 97 /* Bitmap of device quirks. */ 98 int acpi_quirks; 99 100 static int acpi_modevent(struct module *mod, int event, void *junk); 101 static void acpi_identify(driver_t *driver, device_t parent); 102 static int acpi_probe(device_t dev); 103 static int acpi_attach(device_t dev); 104 static int acpi_suspend(device_t dev); 105 static int acpi_resume(device_t dev); 106 static int acpi_shutdown(device_t dev); 107 static device_t acpi_add_child(device_t bus, device_t parent, int order, const char *name, 108 int unit); 109 static int acpi_print_child(device_t bus, device_t child); 110 static void acpi_probe_nomatch(device_t bus, device_t child); 111 static void acpi_driver_added(device_t dev, driver_t *driver); 112 static int acpi_read_ivar(device_t dev, device_t child, int index, 113 uintptr_t *result); 114 static int acpi_write_ivar(device_t dev, device_t child, int index, 115 uintptr_t value); 116 static struct resource_list *acpi_get_rlist(device_t dev, device_t child); 117 static int acpi_sysres_alloc(device_t dev); 118 static struct resource *acpi_alloc_resource(device_t bus, device_t child, 119 int type, int *rid, u_long start, u_long end, 120 u_long count, u_int flags, int cpuid); 121 static int acpi_release_resource(device_t bus, device_t child, int type, 122 int rid, struct resource *r); 123 static void acpi_delete_resource(device_t bus, device_t child, int type, 124 int rid); 125 static uint32_t acpi_isa_get_logicalid(device_t dev); 126 static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count); 127 static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids); 128 static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev, 129 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters, 130 ACPI_BUFFER *ret); 131 static int acpi_device_pwr_for_sleep(device_t bus, device_t dev, 132 int *dstate); 133 static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, 134 void *context, void **retval); 135 static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev, 136 int max_depth, acpi_scan_cb_t user_fn, void *arg); 137 static int acpi_set_powerstate_method(device_t bus, device_t child, 138 int state); 139 static int acpi_isa_pnp_probe(device_t bus, device_t child, 140 struct isa_pnp_id *ids); 141 static void acpi_probe_children(device_t bus); 142 static void acpi_probe_order(ACPI_HANDLE handle, int *order); 143 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, 144 void *context, void **status); 145 static ACPI_STATUS acpi_EnterSleepState(struct acpi_softc *sc, int state); 146 static void acpi_shutdown_final(void *arg, int howto); 147 static void acpi_enable_fixed_events(struct acpi_softc *sc); 148 static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate); 149 static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate); 150 static int acpi_wake_prep_walk(int sstate); 151 static int acpi_wake_sysctl_walk(device_t dev); 152 #ifdef notyet 153 static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS); 154 #endif 155 static void acpi_system_eventhandler_sleep(void *arg, int state); 156 static void acpi_system_eventhandler_wakeup(void *arg, int state); 157 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 158 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 159 static int acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS); 160 static int acpi_pm_func(u_long cmd, void *arg, ...); 161 static int acpi_child_location_str_method(device_t acdev, device_t child, 162 char *buf, size_t buflen); 163 static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child, 164 char *buf, size_t buflen); 165 static void acpi_enable_pcie(void); 166 static void acpi_reset_interfaces(device_t dev); 167 168 static device_method_t acpi_methods[] = { 169 /* Device interface */ 170 DEVMETHOD(device_identify, acpi_identify), 171 DEVMETHOD(device_probe, acpi_probe), 172 DEVMETHOD(device_attach, acpi_attach), 173 DEVMETHOD(device_shutdown, acpi_shutdown), 174 DEVMETHOD(device_detach, bus_generic_detach), 175 DEVMETHOD(device_suspend, acpi_suspend), 176 DEVMETHOD(device_resume, acpi_resume), 177 178 /* Bus interface */ 179 DEVMETHOD(bus_add_child, acpi_add_child), 180 DEVMETHOD(bus_print_child, acpi_print_child), 181 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch), 182 DEVMETHOD(bus_driver_added, acpi_driver_added), 183 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 184 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 185 DEVMETHOD(bus_get_resource_list, acpi_get_rlist), 186 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 187 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 188 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 189 DEVMETHOD(bus_release_resource, acpi_release_resource), 190 DEVMETHOD(bus_delete_resource, acpi_delete_resource), 191 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method), 192 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method), 193 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 194 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 195 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 196 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 197 198 /* ACPI bus */ 199 DEVMETHOD(acpi_id_probe, acpi_device_id_probe), 200 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj), 201 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep), 202 DEVMETHOD(acpi_scan_children, acpi_device_scan_children), 203 204 /* PCI emulation */ 205 DEVMETHOD(pci_set_powerstate, acpi_set_powerstate_method), 206 207 /* ISA emulation */ 208 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 209 210 DEVMETHOD_END 211 }; 212 213 static driver_t acpi_driver = { 214 "acpi", 215 acpi_methods, 216 sizeof(struct acpi_softc), 217 }; 218 219 static devclass_t acpi_devclass; 220 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, NULL); 221 MODULE_VERSION(acpi, 1); 222 223 ACPI_SERIAL_DECL(acpi, "ACPI serializer"); 224 225 /* Local pools for managing system resources for ACPI child devices. */ 226 static struct rman acpi_rman_io, acpi_rman_mem; 227 228 #define ACPI_MINIMUM_AWAKETIME 5 229 230 static const char* sleep_state_names[] = { 231 "S0", "S1", "S2", "S3", "S4", "S5", "NONE"}; 232 233 SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging"); 234 static char acpi_ca_version[12]; 235 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, 236 acpi_ca_version, 0, "Version of Intel ACPICA"); 237 238 /* 239 * Allow overriding _OSI methods. 240 */ 241 static char acpi_install_interface[256]; 242 TUNABLE_STR("hw.acpi.install_interface", acpi_install_interface, 243 sizeof(acpi_install_interface)); 244 static char acpi_remove_interface[256]; 245 TUNABLE_STR("hw.acpi.remove_interface", acpi_remove_interface, 246 sizeof(acpi_remove_interface)); 247 248 /* 249 * Use this tunable to disable the control method auto-serialization 250 * mechanism that was added in 20140214 and superseded the previous 251 * AcpiGbl_SerializeAllMethods global. 252 */ 253 static int acpi_auto_serialize_methods = 1; 254 TUNABLE_INT("hw.acpi.auto_serialize_methods", &acpi_auto_serialize_methods); 255 256 /* Allow users to dump Debug objects without ACPI debugger. */ 257 static int acpi_debug_objects; 258 TUNABLE_INT("debug.acpi.enable_debug_objects", &acpi_debug_objects); 259 SYSCTL_PROC(_debug_acpi, OID_AUTO, enable_debug_objects, 260 CTLFLAG_RW | CTLTYPE_INT, NULL, 0, acpi_debug_objects_sysctl, "I", 261 "Enable Debug objects."); 262 263 /* Allow ignoring the XSDT. */ 264 static int acpi_ignore_xsdt; 265 TUNABLE_INT("debug.acpi.ignore_xsdt", &acpi_ignore_xsdt); 266 SYSCTL_INT(_debug_acpi, OID_AUTO, ignore_xsdt, CTLFLAG_RD, 267 &acpi_ignore_xsdt, 1, "Ignore the XSDT, forcing the use of the RSDT."); 268 269 /* Allow the interpreter to ignore common mistakes in BIOS. */ 270 static int acpi_interpreter_slack = 1; 271 TUNABLE_INT("debug.acpi.interpreter_slack", &acpi_interpreter_slack); 272 SYSCTL_INT(_debug_acpi, OID_AUTO, interpreter_slack, CTLFLAG_RD, 273 &acpi_interpreter_slack, 1, "Turn on interpreter slack mode."); 274 275 /* Allow preferring 32-bit FADT register addresses over the 64-bit ones. */ 276 static int acpi_fadt_addr32; 277 TUNABLE_INT("debug.acpi.fadt_addr32", &acpi_fadt_addr32); 278 SYSCTL_INT(_debug_acpi, OID_AUTO, fadt_addr32, CTLFLAG_RD, 279 &acpi_fadt_addr32, 1, 280 "Prefer 32-bit FADT register addresses over 64-bit ones."); 281 282 /* Prefer 32-bit FACS table addresses over the 64-bit ones. */ 283 static int acpi_facs_addr32 = 1; 284 TUNABLE_INT("debug.acpi.facs_addr32", &acpi_facs_addr32); 285 SYSCTL_INT(_debug_acpi, OID_AUTO, facs_addr32, CTLFLAG_RD, 286 &acpi_facs_addr32, 1, 287 "Prefer 32-bit FACS table addresses over 64-bit ones."); 288 289 static int acpi_group_module_level_code; 290 TUNABLE_INT("debug.acpi.group_module_level_code", &acpi_group_module_level_code); 291 SYSCTL_INT(_debug_acpi, OID_AUTO, group_module_level_code, CTLFLAG_RD, 292 &acpi_group_module_level_code, 1, 293 "Group module-level code."); 294 295 /* Power devices off and on in suspend and resume. XXX Remove once tested. */ 296 static int acpi_do_powerstate = 1; 297 TUNABLE_INT("debug.acpi.do_powerstate", &acpi_do_powerstate); 298 SYSCTL_INT(_debug_acpi, OID_AUTO, do_powerstate, CTLFLAG_RW, 299 &acpi_do_powerstate, 1, "Turn off devices when suspending."); 300 301 /* Allow users to override quirks. */ 302 TUNABLE_INT("debug.acpi.quirks", &acpi_quirks); 303 304 /* Allow to call ACPI methods from userland. */ 305 static int acpi_allow_mcall; 306 TUNABLE_INT("debug.acpi.allow_method_calls", &acpi_allow_mcall); 307 308 static int acpi_susp_bounce; 309 SYSCTL_INT(_debug_acpi, OID_AUTO, suspend_bounce, CTLFLAG_RW, 310 &acpi_susp_bounce, 0, "Don't actually suspend, just test devices."); 311 312 /* 313 * ACPI can only be loaded as a module by the loader; activating it after 314 * system bootstrap time is not useful, and can be fatal to the system. 315 * It also cannot be unloaded, since the entire system bus heirarchy hangs 316 * off it. 317 */ 318 static int 319 acpi_modevent(struct module *mod, int event, void *junk) 320 { 321 switch (event) { 322 case MOD_LOAD: 323 if (!cold) { 324 kprintf("The ACPI driver cannot be loaded after boot.\n"); 325 return (EPERM); 326 } 327 break; 328 case MOD_UNLOAD: 329 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 330 return (EBUSY); 331 break; 332 default: 333 break; 334 } 335 return (0); 336 } 337 338 /* 339 * Perform early initialization. 340 */ 341 ACPI_STATUS 342 acpi_Startup(void) 343 { 344 static int started = 0; 345 ACPI_STATUS status; 346 int val; 347 348 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 349 350 /* Only run the startup code once. The MADT driver also calls this. */ 351 if (started) 352 return_VALUE (AE_OK); 353 started = 1; 354 355 /* 356 * Pre-allocate space for RSDT/XSDT and DSDT tables and allow resizing 357 * if more tables exist. 358 */ 359 if (ACPI_FAILURE(status = AcpiInitializeTables(NULL, 2, TRUE))) { 360 kprintf("ACPI: Table initialisation failed: %s\n", 361 AcpiFormatException(status)); 362 return_VALUE (status); 363 } 364 365 /* Set up any quirks we have for this system. */ 366 if (acpi_quirks == ACPI_Q_OK) 367 acpi_table_quirks(&acpi_quirks); 368 369 /* If the user manually set the disabled hint to 0, force-enable ACPI. */ 370 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0) 371 acpi_quirks &= ~ACPI_Q_BROKEN; 372 if (acpi_quirks & ACPI_Q_BROKEN) { 373 kprintf("ACPI disabled by blacklist. Contact your BIOS vendor.\n"); 374 status = AE_SUPPORT; 375 } 376 377 return_VALUE (status); 378 } 379 380 /* 381 * Detect ACPI, perform early initialisation 382 */ 383 static void 384 acpi_identify(driver_t *driver, device_t parent) 385 { 386 device_t child; 387 388 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 389 390 if (!cold) 391 return_VOID; 392 393 /* Check that we haven't been disabled with a hint. */ 394 if (resource_disabled("acpi", 0)) 395 return_VOID; 396 397 /* Make sure we're not being doubly invoked. */ 398 if (device_find_child(parent, "acpi", 0) != NULL) 399 return_VOID; 400 401 ksnprintf(acpi_ca_version, sizeof(acpi_ca_version), "%x", ACPI_CA_VERSION); 402 403 /* Initialize root tables. */ 404 if (ACPI_FAILURE(acpi_Startup())) { 405 kprintf("ACPI: Try disabling either ACPI or apic support.\n"); 406 return_VOID; 407 } 408 409 /* Attach the actual ACPI device. */ 410 if ((child = BUS_ADD_CHILD(parent, parent, 10, "acpi", 0)) == NULL) { 411 device_printf(parent, "device_identify failed\n"); 412 return_VOID; 413 } 414 } 415 416 /* 417 * Fetch some descriptive data from ACPI to put in our attach message. 418 */ 419 static int 420 acpi_probe(device_t dev) 421 { 422 ACPI_TABLE_RSDP *rsdp; 423 ACPI_TABLE_HEADER *rsdt; 424 ACPI_PHYSICAL_ADDRESS paddr; 425 char buf[ACPI_OEM_ID_SIZE + ACPI_OEM_TABLE_ID_SIZE + 2]; 426 struct sbuf sb; 427 428 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 429 430 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 431 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 432 device_printf(dev, "probe failed, other PM system enabled.\n"); 433 return_VALUE (ENXIO); 434 } 435 436 if ((paddr = AcpiOsGetRootPointer()) == 0 || 437 (rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP))) == NULL) 438 return_VALUE (ENXIO); 439 if (acpi_ignore_xsdt == 0 && 440 rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress != 0) 441 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress; 442 else 443 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress; 444 AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP)); 445 446 if ((rsdt = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER))) == NULL) 447 return_VALUE (ENXIO); 448 sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN); 449 sbuf_bcat(&sb, rsdt->OemId, ACPI_OEM_ID_SIZE); 450 sbuf_trim(&sb); 451 sbuf_putc(&sb, ' '); 452 sbuf_bcat(&sb, rsdt->OemTableId, ACPI_OEM_TABLE_ID_SIZE); 453 sbuf_trim(&sb); 454 sbuf_finish(&sb); 455 device_set_desc_copy(dev, sbuf_data(&sb)); 456 sbuf_delete(&sb); 457 AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER)); 458 459 return_VALUE (0); 460 } 461 462 static int 463 acpi_attach(device_t dev) 464 { 465 struct acpi_softc *sc; 466 ACPI_STATUS status; 467 int error, state; 468 UINT32 flags; 469 UINT8 TypeA, TypeB; 470 char *env; 471 472 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 473 474 sc = device_get_softc(dev); 475 sc->acpi_dev = dev; 476 callout_init(&sc->susp_force_to); 477 478 if ((error = acpi_task_thread_init())) { 479 device_printf(dev, "Could not start task thread.\n"); 480 goto out2; 481 } 482 483 error = ENXIO; 484 485 /* Initialize resource manager. */ 486 acpi_rman_io.rm_type = RMAN_ARRAY; 487 acpi_rman_io.rm_start = 0; 488 acpi_rman_io.rm_end = 0xffff; 489 acpi_rman_io.rm_descr = "ACPI I/O ports"; 490 if (rman_init(&acpi_rman_io, -1) != 0) 491 panic("acpi rman_init IO ports failed"); 492 acpi_rman_mem.rm_type = RMAN_ARRAY; 493 acpi_rman_mem.rm_start = 0; 494 acpi_rman_mem.rm_end = ~0ul; 495 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses"; 496 if (rman_init(&acpi_rman_mem, -1) != 0) 497 panic("acpi rman_init memory failed"); 498 499 /* Initialise the ACPI mutex */ 500 ACPI_LOCK_INIT(acpi, "acpi"); 501 ACPI_SERIAL_INIT(acpi); 502 503 ACPI_LOCK(acpi); 504 505 /* 506 * Set the globals from our tunables. This is needed because ACPICA 507 * uses UINT8 for some values and we have no tunable_byte. 508 */ 509 AcpiGbl_AutoSerializeMethods = acpi_auto_serialize_methods ? TRUE : FALSE; 510 AcpiGbl_DoNotUseXsdt = acpi_ignore_xsdt ? TRUE : FALSE; 511 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE; 512 AcpiGbl_EnableInterpreterSlack = acpi_interpreter_slack ? TRUE : FALSE; 513 AcpiGbl_GroupModuleLevelCode = acpi_group_module_level_code ? TRUE : FALSE; 514 AcpiGbl_Use32BitFadtAddresses = acpi_fadt_addr32 ? TRUE : FALSE; 515 AcpiGbl_Use32BitFacsAddresses = acpi_facs_addr32 ? TRUE : FALSE; 516 517 #ifndef ACPI_DEBUG 518 /* 519 * Disable Debug Object output. 520 */ 521 AcpiDbgLevel &= ~ACPI_LV_DEBUG_OBJECT; 522 #endif 523 524 /* Start up the ACPICA subsystem. */ 525 status = AcpiInitializeSubsystem(); 526 if (ACPI_FAILURE(status)) { 527 device_printf(dev, "Could not initialize Subsystem: %s\n", 528 AcpiFormatException(status)); 529 goto out; 530 } 531 532 /* Override OS interfaces if the user requested. */ 533 acpi_reset_interfaces(dev); 534 535 /* Load ACPI name space. */ 536 status = AcpiLoadTables(); 537 if (ACPI_FAILURE(status)) { 538 device_printf(dev, "Could not load Namespace: %s\n", 539 AcpiFormatException(status)); 540 goto out; 541 } 542 543 /* Handle MCFG table if present. */ 544 acpi_enable_pcie(); 545 546 /* 547 * Note that some systems (specifically, those with namespace evaluation 548 * issues that require the avoidance of parts of the namespace) must 549 * avoid running _INI and _STA on everything, as well as dodging the final 550 * object init pass. 551 * 552 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 553 * 554 * XXX We should arrange for the object init pass after we have attached 555 * all our child devices, but on many systems it works here. 556 */ 557 flags = ACPI_FULL_INITIALIZATION; 558 if (ktestenv("debug.acpi.avoid")) 559 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 560 561 /* Bring the hardware and basic handlers online. */ 562 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 563 device_printf(dev, "Could not enable ACPI: %s\n", 564 AcpiFormatException(status)); 565 goto out; 566 } 567 568 /* 569 * Fix up the interrupt timer after enabling ACPI, so that the 570 * interrupt cputimer that choked by ACPI power management could 571 * be resurrected before probing various devices. 572 */ 573 DELAY(5000); 574 cputimer_intr_pmfixup(); 575 576 /* 577 * Call the ECDT probe function to provide EC functionality before 578 * the namespace has been evaluated. 579 * 580 * XXX This happens before the sysresource devices have been probed and 581 * attached so its resources come from nexus0. In practice, this isn't 582 * a problem but should be addressed eventually. 583 */ 584 acpi_ec_ecdt_probe(dev); 585 586 /* Bring device objects and regions online. */ 587 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 588 device_printf(dev, "Could not initialize ACPI objects: %s\n", 589 AcpiFormatException(status)); 590 goto out; 591 } 592 593 /* 594 * Setup our sysctl tree. 595 * 596 * XXX: This doesn't check to make sure that none of these fail. 597 */ 598 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 599 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 600 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 601 device_get_name(dev), CTLFLAG_RD, 0, ""); 602 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 603 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 604 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 605 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 606 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 607 &sc->acpi_power_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, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 610 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 611 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 612 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 613 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 614 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 615 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 616 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 617 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 618 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 619 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 620 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 621 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0, 622 "sleep delay"); 623 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 624 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode"); 625 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 626 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode"); 627 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 628 OID_AUTO, "disable_on_reboot", CTLFLAG_RW, 629 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system"); 630 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 631 OID_AUTO, "handle_reboot", CTLFLAG_RW, 632 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot"); 633 634 /* 635 * Default to 1 second before sleeping to give some machines time to 636 * stabilize. 637 */ 638 sc->acpi_sleep_delay = 1; 639 if (bootverbose) 640 sc->acpi_verbose = 1; 641 if ((env = kgetenv("hw.acpi.verbose")) != NULL) { 642 if (strcmp(env, "0") != 0) 643 sc->acpi_verbose = 1; 644 kfreeenv(env); 645 } 646 647 /* Only enable reboot by default if the FADT says it is available. */ 648 if (AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) 649 sc->acpi_handle_reboot = 1; 650 651 /* Only enable S4BIOS by default if the FACS says it is available. */ 652 if (AcpiGbl_FACS->Flags & ACPI_FACS_S4_BIOS_PRESENT) 653 sc->acpi_s4bios = 1; 654 655 /* 656 * Dispatch the default sleep state to devices. The lid switch is set 657 * to NONE by default to avoid surprising users. 658 */ 659 sc->acpi_power_button_sx = ACPI_STATE_S5; 660 sc->acpi_lid_switch_sx = ACPI_S_STATES_MAX + 1; 661 sc->acpi_standby_sx = ACPI_STATE_S1; 662 sc->acpi_suspend_sx = ACPI_STATE_S3; 663 664 /* Pick the first valid sleep state for the sleep button default. */ 665 sc->acpi_sleep_button_sx = ACPI_S_STATES_MAX + 1; 666 for (state = ACPI_STATE_S1; state <= ACPI_STATE_S4; state++) 667 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) { 668 sc->acpi_sleep_button_sx = state; 669 break; 670 } 671 672 acpi_enable_fixed_events(sc); 673 674 /* 675 * Scan the namespace and attach/initialise children. 676 */ 677 678 /* Register our shutdown handler. */ 679 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 680 SHUTDOWN_PRI_LAST); 681 682 /* 683 * Register our acpi event handlers. 684 * XXX should be configurable eg. via userland policy manager. 685 */ 686 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 687 sc, ACPI_EVENT_PRI_LAST); 688 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 689 sc, ACPI_EVENT_PRI_LAST); 690 691 /* Flag our initial states. */ 692 sc->acpi_enabled = 1; 693 sc->acpi_sstate = ACPI_STATE_S0; 694 sc->acpi_sleep_disabled = 0; 695 /* Create the control device */ 696 sc->acpi_dev_t = make_dev(&acpi_ops, 0, UID_ROOT, GID_WHEEL, 0644, "acpi"); 697 sc->acpi_dev_t->si_drv1 = sc; 698 699 if ((error = acpi_machdep_init(dev))) 700 goto out; 701 702 /* Register ACPI again to pass the correct argument of pm_func. */ 703 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 704 705 if (!acpi_disabled("bus")) 706 acpi_probe_children(dev); 707 708 /* Update all GPEs and enable runtime GPEs. */ 709 status = AcpiUpdateAllGpes(); 710 if (ACPI_FAILURE(status)) { 711 device_printf(dev, "Could not update all GPEs: %s\n", 712 AcpiFormatException(status)); 713 } 714 715 /* Allow sleep request after a while. */ 716 /* timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); */ 717 718 error = 0; 719 720 out: 721 ACPI_UNLOCK(acpi); 722 out2: 723 cputimer_intr_pmfixup(); 724 acpi_task_thread_schedule(); 725 726 return_VALUE (error); 727 } 728 729 static int 730 acpi_suspend(device_t dev) 731 { 732 device_t child, *devlist; 733 int error, i, numdevs, pstate; 734 735 /* First give child devices a chance to suspend. */ 736 error = bus_generic_suspend(dev); 737 if (error) 738 return (error); 739 740 /* 741 * Now, set them into the appropriate power state, usually D3. If the 742 * device has an _SxD method for the next sleep state, use that power 743 * state instead. 744 */ 745 device_get_children(dev, &devlist, &numdevs); 746 for (i = 0; i < numdevs; i++) { 747 /* If the device is not attached, we've powered it down elsewhere. */ 748 child = devlist[i]; 749 if (!device_is_attached(child)) 750 continue; 751 752 /* 753 * Default to D3 for all sleep states. The _SxD method is optional 754 * so set the powerstate even if it's absent. 755 */ 756 pstate = PCI_POWERSTATE_D3; 757 error = acpi_device_pwr_for_sleep(device_get_parent(child), 758 child, &pstate); 759 if ((error == 0 || error == ESRCH) && acpi_do_powerstate) 760 pci_set_powerstate(child, pstate); 761 } 762 kfree(devlist, M_TEMP); 763 error = 0; 764 765 return (error); 766 } 767 768 static int 769 acpi_resume(device_t dev) 770 { 771 ACPI_HANDLE handle; 772 int i, numdevs; 773 device_t child, *devlist; 774 775 /* 776 * Put all devices in D0 before resuming them. Call _S0D on each one 777 * since some systems expect this. 778 */ 779 device_get_children(dev, &devlist, &numdevs); 780 for (i = 0; i < numdevs; i++) { 781 child = devlist[i]; 782 handle = acpi_get_handle(child); 783 if (handle) 784 AcpiEvaluateObject(handle, "_S0D", NULL, NULL); 785 if (device_is_attached(child) && acpi_do_powerstate) 786 pci_set_powerstate(child, PCI_POWERSTATE_D0); 787 } 788 kfree(devlist, M_TEMP); 789 790 return (bus_generic_resume(dev)); 791 } 792 793 static int 794 acpi_shutdown(device_t dev) 795 { 796 /* Allow children to shutdown first. */ 797 bus_generic_shutdown(dev); 798 799 /* 800 * Enable any GPEs that are able to power-on the system (i.e., RTC). 801 * Also, disable any that are not valid for this state (most). 802 */ 803 acpi_wake_prep_walk(ACPI_STATE_S5); 804 805 return (0); 806 } 807 808 /* 809 * Handle a new device being added 810 */ 811 static device_t 812 acpi_add_child(device_t bus, device_t parent, int order, const char *name, int unit) 813 { 814 struct acpi_device *ad; 815 device_t child; 816 817 if ((ad = kmalloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 818 return (NULL); 819 820 resource_list_init(&ad->ad_rl); 821 child = device_add_child_ordered(parent, order, name, unit); 822 if (child != NULL) 823 device_set_ivars(child, ad); 824 else 825 kfree(ad, M_ACPIDEV); 826 return (child); 827 } 828 829 static int 830 acpi_print_child(device_t bus, device_t child) 831 { 832 struct acpi_device *adev = device_get_ivars(child); 833 struct resource_list *rl = &adev->ad_rl; 834 int retval = 0; 835 836 retval += bus_print_child_header(bus, child); 837 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 838 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 839 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 840 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 841 if (device_get_flags(child)) 842 retval += kprintf(" flags %#x", device_get_flags(child)); 843 retval += bus_print_child_footer(bus, child); 844 845 return (retval); 846 } 847 848 /* 849 * If this device is an ACPI child but no one claimed it, attempt 850 * to power it off. We'll power it back up when a driver is added. 851 * 852 * XXX Disabled for now since many necessary devices (like fdc and 853 * ATA) don't claim the devices we created for them but still expect 854 * them to be powered up. 855 */ 856 static void 857 acpi_probe_nomatch(device_t bus, device_t child) 858 { 859 860 /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */ 861 } 862 863 /* 864 * If a new driver has a chance to probe a child, first power it up. 865 * 866 * XXX Disabled for now (see acpi_probe_nomatch for details). 867 */ 868 static void 869 acpi_driver_added(device_t dev, driver_t *driver) 870 { 871 device_t child, *devlist; 872 int i, numdevs; 873 874 DEVICE_IDENTIFY(driver, dev); 875 device_get_children(dev, &devlist, &numdevs); 876 for (i = 0; i < numdevs; i++) { 877 child = devlist[i]; 878 if (device_get_state(child) == DS_NOTPRESENT) { 879 /* pci_set_powerstate(child, PCI_POWERSTATE_D0); */ 880 if (device_probe_and_attach(child) != 0) 881 ; /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */ 882 } 883 } 884 kfree(devlist, M_TEMP); 885 } 886 887 /* Location hint for devctl(8) */ 888 static int 889 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf, 890 size_t buflen) 891 { 892 struct acpi_device *dinfo = device_get_ivars(child); 893 894 if (dinfo->ad_handle) 895 ksnprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle)); 896 else 897 ksnprintf(buf, buflen, "unknown"); 898 return (0); 899 } 900 901 /* PnP information for devctl(8) */ 902 static int 903 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 904 size_t buflen) 905 { 906 ACPI_DEVICE_INFO *adinfo; 907 struct acpi_device *dinfo = device_get_ivars(child); 908 char *end; 909 910 if (ACPI_FAILURE(AcpiGetObjectInfo(dinfo->ad_handle, &adinfo))) { 911 ksnprintf(buf, buflen, "unknown"); 912 } else { 913 ksnprintf(buf, buflen, "_HID=%s _UID=%lu", 914 (adinfo->Valid & ACPI_VALID_HID) ? 915 adinfo->HardwareId.String : "none", 916 (adinfo->Valid & ACPI_VALID_UID) ? 917 strtoul(adinfo->UniqueId.String, &end, 10) : 0); 918 if (adinfo) 919 AcpiOsFree(adinfo); 920 } 921 return (0); 922 } 923 924 /* 925 * Handle per-device ivars 926 */ 927 static int 928 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 929 { 930 struct acpi_device *ad; 931 932 if ((ad = device_get_ivars(child)) == NULL) { 933 device_printf(child, "device has no ivars\n"); 934 return (ENOENT); 935 } 936 937 /* ACPI and ISA compatibility ivars */ 938 switch(index) { 939 case ACPI_IVAR_HANDLE: 940 *(ACPI_HANDLE *)result = ad->ad_handle; 941 break; 942 case ACPI_IVAR_MAGIC: 943 *result = ad->ad_magic; 944 break; 945 case ACPI_IVAR_PRIVATE: 946 *(void **)result = ad->ad_private; 947 break; 948 case ACPI_IVAR_FLAGS: 949 *(int *)result = ad->ad_flags; 950 break; 951 case ISA_IVAR_VENDORID: 952 case ISA_IVAR_SERIAL: 953 case ISA_IVAR_COMPATID: 954 *(int *)result = -1; 955 break; 956 case ISA_IVAR_LOGICALID: 957 *(int *)result = acpi_isa_get_logicalid(child); 958 break; 959 default: 960 return (ENOENT); 961 } 962 963 return (0); 964 } 965 966 static int 967 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 968 { 969 struct acpi_device *ad; 970 971 if ((ad = device_get_ivars(child)) == NULL) { 972 device_printf(child, "device has no ivars\n"); 973 return (ENOENT); 974 } 975 976 switch(index) { 977 case ACPI_IVAR_HANDLE: 978 ad->ad_handle = (ACPI_HANDLE)value; 979 break; 980 case ACPI_IVAR_MAGIC: 981 ad->ad_magic = value; 982 break; 983 case ACPI_IVAR_PRIVATE: 984 ad->ad_private = (void *)value; 985 break; 986 case ACPI_IVAR_FLAGS: 987 ad->ad_flags = (int)value; 988 break; 989 default: 990 panic("bad ivar write request (%d)", index); 991 return (ENOENT); 992 } 993 994 return (0); 995 } 996 997 /* 998 * Handle child resource allocation/removal 999 */ 1000 static struct resource_list * 1001 acpi_get_rlist(device_t dev, device_t child) 1002 { 1003 struct acpi_device *ad; 1004 1005 ad = device_get_ivars(child); 1006 return (&ad->ad_rl); 1007 } 1008 1009 /* 1010 * Pre-allocate/manage all memory and IO resources. Since rman can't handle 1011 * duplicates, we merge any in the sysresource attach routine. 1012 */ 1013 static int 1014 acpi_sysres_alloc(device_t dev) 1015 { 1016 struct resource *res; 1017 struct resource_list *rl; 1018 struct resource_list_entry *rle; 1019 struct rman *rm; 1020 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 1021 device_t *children; 1022 int child_count, i; 1023 /* 1024 * Probe/attach any sysresource devices. This would be unnecessary if we 1025 * had multi-pass probe/attach. 1026 */ 1027 if (device_get_children(dev, &children, &child_count) != 0) 1028 return (ENXIO); 1029 for (i = 0; i < child_count; i++) { 1030 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 1031 device_probe_and_attach(children[i]); 1032 } 1033 kfree(children, M_TEMP); 1034 1035 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev); 1036 if(!rl) 1037 return 0; 1038 SLIST_FOREACH(rle, rl, link) { 1039 if (rle->res != NULL) { 1040 device_printf(dev, "duplicate resource for %lx\n", rle->start); 1041 continue; 1042 } 1043 1044 /* Only memory and IO resources are valid here. */ 1045 switch (rle->type) { 1046 case SYS_RES_IOPORT: 1047 rm = &acpi_rman_io; 1048 break; 1049 case SYS_RES_MEMORY: 1050 rm = &acpi_rman_mem; 1051 break; 1052 default: 1053 continue; 1054 } 1055 1056 /* Pre-allocate resource and add to our rman pool. */ 1057 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type, 1058 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 1059 0, -1); 1060 if (res != NULL) { 1061 rman_manage_region(rm, rman_get_start(res), rman_get_end(res)); 1062 rle->res = res; 1063 } else 1064 device_printf(dev, "reservation of %lx, %lx (%d) failed\n", 1065 rle->start, rle->count, rle->type); 1066 } 1067 return (0); 1068 } 1069 1070 static struct resource * 1071 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 1072 u_long start, u_long end, u_long count, u_int flags, int cpuid) 1073 { 1074 ACPI_RESOURCE ares; 1075 struct acpi_device *ad = device_get_ivars(child); 1076 struct resource_list *rl = &ad->ad_rl; 1077 struct resource_list_entry *rle; 1078 struct resource *res; 1079 struct rman *rm; 1080 1081 res = NULL; 1082 1083 /* We only handle memory and IO resources through rman. */ 1084 switch (type) { 1085 case SYS_RES_IOPORT: 1086 rm = &acpi_rman_io; 1087 break; 1088 case SYS_RES_MEMORY: 1089 rm = &acpi_rman_mem; 1090 break; 1091 default: 1092 rm = NULL; 1093 } 1094 1095 ACPI_SERIAL_BEGIN(acpi); 1096 1097 /* 1098 * If this is an allocation of the "default" range for a given RID, and 1099 * we know what the resources for this device are (i.e., they're on the 1100 * child's resource list), use those start/end values. 1101 */ 1102 if (bus == device_get_parent(child) && start == 0UL && end == ~0UL) { 1103 rle = resource_list_find(rl, type, *rid); 1104 if (rle == NULL) 1105 goto out; 1106 start = rle->start; 1107 end = rle->end; 1108 count = rle->count; 1109 cpuid = rle->cpuid; 1110 } 1111 1112 /* 1113 * If this is an allocation of a specific range, see if we can satisfy 1114 * the request from our system resource regions. If we can't, pass the 1115 * request up to the parent. 1116 */ 1117 if (start + count - 1 == end && rm != NULL) 1118 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE, 1119 child); 1120 if (res == NULL) { 1121 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid, 1122 start, end, count, flags, cpuid); 1123 } else { 1124 rman_set_rid(res, *rid); 1125 1126 /* If requested, activate the resource using the parent's method. */ 1127 if (flags & RF_ACTIVE) 1128 if (bus_activate_resource(child, type, *rid, res) != 0) { 1129 rman_release_resource(res); 1130 res = NULL; 1131 goto out; 1132 } 1133 } 1134 1135 if (res != NULL && device_get_parent(child) == bus) 1136 switch (type) { 1137 case SYS_RES_IRQ: 1138 /* 1139 * Since bus_config_intr() takes immediate effect, we cannot 1140 * configure the interrupt associated with a device when we 1141 * parse the resources but have to defer it until a driver 1142 * actually allocates the interrupt via bus_alloc_resource(). 1143 * 1144 * NB: Lookup failure is fine, since the device may add its 1145 * own interrupt resources, e.g. MSI or MSI-X. 1146 */ 1147 if (ACPI_SUCCESS( 1148 acpi_lookup_irq_resource(child, *rid, res, &ares))) { 1149 acpi_config_intr(child, &ares); 1150 } else { 1151 kprintf("irq resource not found\n"); 1152 } 1153 break; 1154 } 1155 1156 out: 1157 ACPI_SERIAL_END(acpi); 1158 return (res); 1159 } 1160 1161 static int 1162 acpi_release_resource(device_t bus, device_t child, int type, int rid, 1163 struct resource *r) 1164 { 1165 struct rman *rm; 1166 int ret; 1167 1168 /* We only handle memory and IO resources through rman. */ 1169 switch (type) { 1170 case SYS_RES_IOPORT: 1171 rm = &acpi_rman_io; 1172 break; 1173 case SYS_RES_MEMORY: 1174 rm = &acpi_rman_mem; 1175 break; 1176 default: 1177 rm = NULL; 1178 } 1179 1180 ACPI_SERIAL_BEGIN(acpi); 1181 1182 /* 1183 * If this resource belongs to one of our internal managers, 1184 * deactivate it and release it to the local pool. If it doesn't, 1185 * pass this request up to the parent. 1186 */ 1187 if (rm != NULL && rman_is_region_manager(r, rm)) { 1188 if (rman_get_flags(r) & RF_ACTIVE) { 1189 ret = bus_deactivate_resource(child, type, rid, r); 1190 if (ret != 0) 1191 goto out; 1192 } 1193 ret = rman_release_resource(r); 1194 } else 1195 ret = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, type, rid, r); 1196 1197 out: 1198 ACPI_SERIAL_END(acpi); 1199 return (ret); 1200 } 1201 1202 static void 1203 acpi_delete_resource(device_t bus, device_t child, int type, int rid) 1204 { 1205 struct resource_list *rl; 1206 1207 rl = acpi_get_rlist(bus, child); 1208 resource_list_delete(rl, type, rid); 1209 } 1210 1211 /* Allocate an IO port or memory resource, given its GAS. */ 1212 int 1213 acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas, 1214 struct resource **res, u_int flags) 1215 { 1216 int error, res_type; 1217 1218 error = ENOMEM; 1219 if (type == NULL || rid == NULL || gas == NULL || res == NULL) 1220 return (EINVAL); 1221 1222 /* We only support memory and IO spaces. */ 1223 switch (gas->SpaceId) { 1224 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1225 res_type = SYS_RES_MEMORY; 1226 break; 1227 case ACPI_ADR_SPACE_SYSTEM_IO: 1228 res_type = SYS_RES_IOPORT; 1229 break; 1230 default: 1231 return (EOPNOTSUPP); 1232 } 1233 1234 /* 1235 * If the register width is less than 8, assume the BIOS author means 1236 * it is a bit field and just allocate a byte. 1237 */ 1238 if (gas->BitWidth && gas->BitWidth < 8) 1239 gas->BitWidth = 8; 1240 1241 /* Validate the address after we're sure we support the space. */ 1242 if (gas->Address == 0 || gas->BitWidth == 0) 1243 return (EINVAL); 1244 1245 bus_set_resource(dev, res_type, *rid, gas->Address, 1246 gas->BitWidth / 8, -1); 1247 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags); 1248 if (*res != NULL) { 1249 *type = res_type; 1250 error = 0; 1251 } else 1252 bus_delete_resource(dev, res_type, *rid); 1253 1254 return (error); 1255 } 1256 1257 ACPI_STATUS 1258 acpi_eval_osc(device_t dev, ACPI_HANDLE handle, const char *uuidstr, 1259 int revision, uint32_t *buf, int count) 1260 { 1261 ACPI_BUFFER retbuf = { ACPI_ALLOCATE_BUFFER, NULL }; 1262 ACPI_OBJECT_LIST arglist; 1263 ACPI_OBJECT arg[4]; 1264 ACPI_OBJECT *retobj; 1265 ACPI_STATUS status; 1266 struct uuid uuid; 1267 uint32_t error; 1268 uint8_t oscuuid[16]; 1269 int i; 1270 1271 if (parse_uuid(uuidstr, &uuid) != 0) 1272 return (AE_ERROR); 1273 le_uuid_enc(oscuuid, &uuid); 1274 1275 arglist.Pointer = arg; 1276 arglist.Count = 4; 1277 arg[0].Type = ACPI_TYPE_BUFFER; 1278 arg[0].Buffer.Length = sizeof(oscuuid); 1279 arg[0].Buffer.Pointer = oscuuid; /* UUID */ 1280 arg[1].Type = ACPI_TYPE_INTEGER; 1281 arg[1].Integer.Value = revision; /* revision */ 1282 arg[2].Type = ACPI_TYPE_INTEGER; 1283 arg[2].Integer.Value = count; /* # of cap integers */ 1284 arg[3].Type = ACPI_TYPE_BUFFER; 1285 arg[3].Buffer.Length = count * sizeof(uint32_t); /* capabilities buffer */ 1286 arg[3].Buffer.Pointer = (uint8_t *)buf; 1287 1288 status = AcpiEvaluateObject(handle, "_OSC", &arglist, &retbuf); 1289 if (ACPI_FAILURE(status)) 1290 goto done; 1291 retobj = retbuf.Pointer; 1292 error = ((uint32_t *)retobj->Buffer.Pointer)[0] & ACPI_OSCERR_MASK; 1293 if (error == 0) 1294 goto done; 1295 status = AE_ERROR; 1296 if (error & ACPI_OSCERR_OSCFAIL) 1297 device_printf(dev, "_OSC unable to process request\n"); 1298 if (error & ACPI_OSCERR_UUID) 1299 device_printf(dev, "_OSC unrecognized UUID (%s)\n", uuidstr); 1300 if (error & ACPI_OSCERR_REVISION) 1301 device_printf(dev, "_OSC unrecognized revision ID (%d)\n", revision); 1302 if (error & ACPI_OSCERR_CAPSMASKED) { 1303 if ((buf[0] & ACPI_OSC_QUERY_SUPPORT) == 0) { 1304 for (i = 1; i < count; i++) { 1305 device_printf(dev, 1306 "_OSC capabilities have been masked: buf[%d]:%#x\n", 1307 i, buf[i] & ~((uint32_t *)retobj->Buffer.Pointer)[i]); 1308 } 1309 status = AE_SUPPORT; 1310 } else { 1311 status = AE_OK; 1312 } 1313 } 1314 1315 done: 1316 if (retbuf.Pointer != NULL) 1317 AcpiOsFree(retbuf.Pointer); 1318 return (status); 1319 } 1320 1321 /* Probe _HID and _CID for compatible ISA PNP ids. */ 1322 static uint32_t 1323 acpi_isa_get_logicalid(device_t dev) 1324 { 1325 ACPI_DEVICE_INFO *devinfo; 1326 ACPI_HANDLE h; 1327 uint32_t pnpid; 1328 1329 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1330 1331 devinfo = NULL; 1332 pnpid = 0; 1333 1334 /* Fetch and validate the HID. */ 1335 if ((h = acpi_get_handle(dev)) == NULL || 1336 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1337 goto out; 1338 1339 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 1340 pnpid = PNP_EISAID(devinfo->HardwareId.String); 1341 1342 out: 1343 if (devinfo) 1344 AcpiOsFree(devinfo); 1345 return_VALUE (pnpid); 1346 } 1347 1348 static int 1349 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 1350 { 1351 ACPI_DEVICE_INFO *devinfo; 1352 ACPI_HANDLE h; 1353 uint32_t *pnpid; 1354 int valid, i; 1355 1356 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1357 1358 devinfo = NULL; 1359 pnpid = cids; 1360 valid = 0; 1361 1362 /* Fetch and validate the CID */ 1363 if ((h = acpi_get_handle(dev)) == NULL || 1364 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)) || 1365 (devinfo->Valid & ACPI_VALID_CID) == 0) 1366 goto out; 1367 1368 if (devinfo->CompatibleIdList.Count < count) 1369 count = devinfo->CompatibleIdList.Count; 1370 for (i = 0; i < count; i++) { 1371 if (strncmp(devinfo->CompatibleIdList.Ids[i].String, "PNP", 3) != 0) 1372 continue; 1373 *pnpid++ = PNP_EISAID(devinfo->CompatibleIdList.Ids[i].String); 1374 valid++; 1375 } 1376 1377 out: 1378 if (devinfo) 1379 AcpiOsFree(devinfo); 1380 return_VALUE (valid); 1381 } 1382 1383 static char * 1384 acpi_device_id_probe(device_t bus, device_t dev, char **ids) 1385 { 1386 ACPI_HANDLE h; 1387 int i; 1388 1389 h = acpi_get_handle(dev); 1390 if (ids == NULL || h == NULL || acpi_get_type(dev) != ACPI_TYPE_DEVICE) 1391 return (NULL); 1392 1393 /* Try to match one of the array of IDs with a HID or CID. */ 1394 for (i = 0; ids[i] != NULL; i++) { 1395 if (acpi_MatchHid(h, ids[i])) 1396 return (ids[i]); 1397 } 1398 return (NULL); 1399 } 1400 1401 static ACPI_STATUS 1402 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname, 1403 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret) 1404 { 1405 ACPI_HANDLE h; 1406 1407 if (dev == NULL) 1408 h = ACPI_ROOT_OBJECT; 1409 else if ((h = acpi_get_handle(dev)) == NULL) 1410 return (AE_BAD_PARAMETER); 1411 return (AcpiEvaluateObject(h, pathname, parameters, ret)); 1412 } 1413 1414 static int 1415 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate) 1416 { 1417 struct acpi_softc *sc; 1418 ACPI_HANDLE handle; 1419 ACPI_STATUS status; 1420 char sxd[8]; 1421 int error; 1422 1423 sc = device_get_softc(bus); 1424 handle = acpi_get_handle(dev); 1425 1426 /* 1427 * XXX If we find these devices, don't try to power them down. 1428 * The serial and IRDA ports on my T23 hang the system when 1429 * set to D3 and it appears that such legacy devices may 1430 * need special handling in their drivers. 1431 */ 1432 if (handle == NULL || 1433 acpi_MatchHid(handle, "PNP0500") || 1434 acpi_MatchHid(handle, "PNP0501") || 1435 acpi_MatchHid(handle, "PNP0502") || 1436 acpi_MatchHid(handle, "PNP0510") || 1437 acpi_MatchHid(handle, "PNP0511")) 1438 return (ENXIO); 1439 1440 /* 1441 * Override next state with the value from _SxD, if present. If no 1442 * dstate argument was provided, don't fetch the return value. 1443 */ 1444 ksnprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate); 1445 if (dstate) 1446 status = acpi_GetInteger(handle, sxd, dstate); 1447 else 1448 status = AcpiEvaluateObject(handle, sxd, NULL, NULL); 1449 1450 switch (status) { 1451 case AE_OK: 1452 error = 0; 1453 break; 1454 case AE_NOT_FOUND: 1455 error = ESRCH; 1456 break; 1457 default: 1458 error = ENXIO; 1459 break; 1460 } 1461 1462 return (error); 1463 } 1464 1465 /* Callback arg for our implementation of walking the namespace. */ 1466 struct acpi_device_scan_ctx { 1467 acpi_scan_cb_t user_fn; 1468 void *arg; 1469 ACPI_HANDLE parent; 1470 }; 1471 1472 static ACPI_STATUS 1473 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval) 1474 { 1475 struct acpi_device_scan_ctx *ctx; 1476 device_t dev, old_dev; 1477 ACPI_STATUS status; 1478 ACPI_OBJECT_TYPE type; 1479 1480 /* 1481 * Skip this device if we think we'll have trouble with it or it is 1482 * the parent where the scan began. 1483 */ 1484 ctx = (struct acpi_device_scan_ctx *)arg; 1485 if (acpi_avoid(h) || h == ctx->parent) 1486 return (AE_OK); 1487 1488 /* If this is not a valid device type (e.g., a method), skip it. */ 1489 if (ACPI_FAILURE(AcpiGetType(h, &type))) 1490 return (AE_OK); 1491 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR && 1492 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER) 1493 return (AE_OK); 1494 1495 /* 1496 * Call the user function with the current device. If it is unchanged 1497 * afterwards, return. Otherwise, we update the handle to the new dev. 1498 */ 1499 old_dev = acpi_get_device(h); 1500 dev = old_dev; 1501 status = ctx->user_fn(h, &dev, level, ctx->arg); 1502 if (ACPI_FAILURE(status) || old_dev == dev) 1503 return (status); 1504 1505 /* Remove the old child and its connection to the handle. */ 1506 if (old_dev != NULL) { 1507 device_delete_child(device_get_parent(old_dev), old_dev); 1508 AcpiDetachData(h, acpi_fake_objhandler); 1509 } 1510 1511 /* Recreate the handle association if the user created a device. */ 1512 if (dev != NULL) 1513 AcpiAttachData(h, acpi_fake_objhandler, dev); 1514 1515 return (AE_OK); 1516 } 1517 1518 static ACPI_STATUS 1519 acpi_device_scan_children(device_t bus, device_t dev, int max_depth, 1520 acpi_scan_cb_t user_fn, void *arg) 1521 { 1522 ACPI_HANDLE h; 1523 struct acpi_device_scan_ctx ctx; 1524 1525 if (acpi_disabled("children")) 1526 return (AE_OK); 1527 1528 if (dev == NULL) 1529 h = ACPI_ROOT_OBJECT; 1530 else if ((h = acpi_get_handle(dev)) == NULL) 1531 return (AE_BAD_PARAMETER); 1532 ctx.user_fn = user_fn; 1533 ctx.arg = arg; 1534 ctx.parent = h; 1535 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth, 1536 acpi_device_scan_cb, NULL, &ctx, NULL)); 1537 } 1538 1539 /* 1540 * Even though ACPI devices are not PCI, we use the PCI approach for setting 1541 * device power states since it's close enough to ACPI. 1542 */ 1543 static int 1544 acpi_set_powerstate_method(device_t bus, device_t child, int state) 1545 { 1546 ACPI_HANDLE h; 1547 ACPI_STATUS status; 1548 int error; 1549 1550 error = 0; 1551 h = acpi_get_handle(child); 1552 if (state < ACPI_STATE_D0 || state > ACPI_STATE_D3) 1553 return (EINVAL); 1554 if (h == NULL) 1555 return (0); 1556 1557 /* Ignore errors if the power methods aren't present. */ 1558 status = acpi_pwr_switch_consumer(h, state); 1559 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND 1560 && status != AE_BAD_PARAMETER) 1561 device_printf(bus, "failed to set ACPI power state D%d on %s: %s\n", 1562 state, acpi_name(h), AcpiFormatException(status)); 1563 1564 return (error); 1565 } 1566 1567 static int 1568 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 1569 { 1570 int result, cid_count, i; 1571 uint32_t lid, cids[8]; 1572 1573 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1574 1575 /* 1576 * ISA-style drivers attached to ACPI may persist and 1577 * probe manually if we return ENOENT. We never want 1578 * that to happen, so don't ever return it. 1579 */ 1580 result = ENXIO; 1581 1582 /* Scan the supplied IDs for a match */ 1583 lid = acpi_isa_get_logicalid(child); 1584 cid_count = acpi_isa_get_compatid(child, cids, 8); 1585 while (ids && ids->ip_id) { 1586 if (lid == ids->ip_id) { 1587 result = 0; 1588 goto out; 1589 } 1590 for (i = 0; i < cid_count; i++) { 1591 if (cids[i] == ids->ip_id) { 1592 result = 0; 1593 goto out; 1594 } 1595 } 1596 ids++; 1597 } 1598 1599 out: 1600 if (result == 0 && ids->ip_desc) 1601 device_set_desc(child, ids->ip_desc); 1602 1603 return_VALUE (result); 1604 } 1605 1606 /* 1607 * Look for a MCFG table. If it is present, use the settings for 1608 * domain (segment) 0 to setup PCI config space access via the memory 1609 * map. 1610 */ 1611 static void 1612 acpi_enable_pcie(void) 1613 { 1614 ACPI_TABLE_HEADER *hdr; 1615 ACPI_MCFG_ALLOCATION *alloc, *end; 1616 ACPI_STATUS status; 1617 1618 status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr); 1619 if (ACPI_FAILURE(status)) 1620 return; 1621 1622 end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length); 1623 alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1); 1624 while (alloc < end) { 1625 if (alloc->PciSegment == 0) { 1626 pcie_cfgregopen(alloc->Address, alloc->StartBusNumber, 1627 alloc->EndBusNumber); 1628 return; 1629 } 1630 alloc++; 1631 } 1632 } 1633 1634 /* 1635 * Scan all of the ACPI namespace and attach child devices. 1636 * 1637 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and 1638 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec. 1639 * However, in violation of the spec, some systems place their PCI link 1640 * devices in \, so we have to walk the whole namespace. We check the 1641 * type of namespace nodes, so this should be ok. 1642 */ 1643 static void 1644 acpi_probe_children(device_t bus) 1645 { 1646 1647 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1648 1649 /* 1650 * Scan the namespace and insert placeholders for all the devices that 1651 * we find. We also probe/attach any early devices. 1652 * 1653 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1654 * we want to create nodes for all devices, not just those that are 1655 * currently present. (This assumes that we don't want to create/remove 1656 * devices as they appear, which might be smarter.) 1657 */ 1658 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1659 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, 1660 acpi_probe_child, NULL, bus, NULL); 1661 1662 /* Pre-allocate resources for our rman from any sysresource devices. */ 1663 acpi_sysres_alloc(bus); 1664 /* Create any static children by calling device identify methods. */ 1665 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1666 bus_generic_probe(bus); 1667 1668 /* Probe/attach all children, created staticly and from the namespace. */ 1669 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 1670 bus_generic_attach(bus); 1671 1672 /* 1673 * Some of these children may have attached others as part of their attach 1674 * process (eg. the root PCI bus driver), so rescan. 1675 */ 1676 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 1677 bus_generic_attach(bus); 1678 1679 /* Attach wake sysctls. */ 1680 acpi_wake_sysctl_walk(bus); 1681 1682 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1683 return_VOID; 1684 } 1685 1686 /* 1687 * Determine the probe order for a given device. 1688 */ 1689 static void 1690 acpi_probe_order(ACPI_HANDLE handle, int *order) 1691 { 1692 ACPI_OBJECT_TYPE type; 1693 1694 /* 1695 * 1. I/O port and memory system resource holders 1696 * 2. Embedded controllers (to handle early accesses) 1697 * 3. PCI Link Devices 1698 * 100000. CPUs 1699 */ 1700 AcpiGetType(handle, &type); 1701 if (acpi_MatchHid(handle, "PNP0C01") || acpi_MatchHid(handle, "PNP0C02")) 1702 *order = 1; 1703 else if (acpi_MatchHid(handle, "PNP0C09")) 1704 *order = 2; 1705 else if (acpi_MatchHid(handle, "PNP0C0F")) 1706 *order = 3; 1707 else if (type == ACPI_TYPE_PROCESSOR) 1708 *order = 100000; 1709 } 1710 1711 /* 1712 * Evaluate a child device and determine whether we might attach a device to 1713 * it. 1714 */ 1715 static ACPI_STATUS 1716 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1717 { 1718 struct acpi_prw_data prw; 1719 ACPI_OBJECT_TYPE type; 1720 ACPI_HANDLE h; 1721 device_t bus, child; 1722 int order; 1723 char *handle_str; 1724 1725 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1726 1727 if (acpi_disabled("children")) 1728 return_ACPI_STATUS (AE_OK); 1729 1730 /* Skip this device if we think we'll have trouble with it. */ 1731 if (acpi_avoid(handle)) 1732 return_ACPI_STATUS (AE_OK); 1733 1734 bus = (device_t)context; 1735 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1736 handle_str = acpi_name(handle); 1737 switch (type) { 1738 case ACPI_TYPE_DEVICE: 1739 /* 1740 * Since we scan from \, be sure to skip system scope objects. 1741 * \_SB_ and \_TZ_ are defined in ACPICA as devices to work around 1742 * BIOS bugs. For example, \_SB_ is to allow \_SB_._INI to be run 1743 * during the intialization and \_TZ_ is to support Notify() on it. 1744 */ 1745 if (strcmp(handle_str, "\\_SB_") == 0 || 1746 strcmp(handle_str, "\\_TZ_") == 0) 1747 break; 1748 1749 if (acpi_parse_prw(handle, &prw) == 0) 1750 AcpiSetupGpeForWake(handle, prw.gpe_handle, prw.gpe_bit); 1751 1752 /* FALLTHROUGH */ 1753 case ACPI_TYPE_PROCESSOR: 1754 case ACPI_TYPE_THERMAL: 1755 case ACPI_TYPE_POWER: 1756 /* 1757 * Create a placeholder device for this node. Sort the 1758 * placeholder so that the probe/attach passes will run 1759 * breadth-first. Orders less than ACPI_DEV_BASE_ORDER 1760 * are reserved for special objects (i.e., system 1761 * resources). CPU devices have a very high order to 1762 * ensure they are probed after other devices. 1763 */ 1764 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str)); 1765 order = level * 10 + 100; 1766 acpi_probe_order(handle, &order); 1767 child = BUS_ADD_CHILD(bus, bus, order, NULL, -1); 1768 if (child == NULL) 1769 break; 1770 1771 /* Associate the handle with the device_t and vice versa. */ 1772 acpi_set_handle(child, handle); 1773 AcpiAttachData(handle, acpi_fake_objhandler, child); 1774 1775 /* 1776 * Check that the device is present. If it's not present, 1777 * leave it disabled (so that we have a device_t attached to 1778 * the handle, but we don't probe it). 1779 * 1780 * XXX PCI link devices sometimes report "present" but not 1781 * "functional" (i.e. if disabled). Go ahead and probe them 1782 * anyway since we may enable them later. 1783 */ 1784 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 1785 /* Never disable PCI link devices. */ 1786 if (acpi_MatchHid(handle, "PNP0C0F")) 1787 break; 1788 /* 1789 * Docking stations should remain enabled since the system 1790 * may be undocked at boot. 1791 */ 1792 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h))) 1793 break; 1794 1795 device_disable(child); 1796 break; 1797 } 1798 1799 /* 1800 * Get the device's resource settings and attach them. 1801 * Note that if the device has _PRS but no _CRS, we need 1802 * to decide when it's appropriate to try to configure the 1803 * device. Ignore the return value here; it's OK for the 1804 * device not to have any resources. 1805 */ 1806 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 1807 break; 1808 } 1809 } 1810 1811 return_ACPI_STATUS (AE_OK); 1812 } 1813 1814 /* 1815 * AcpiAttachData() requires an object handler but never uses it. This is a 1816 * placeholder object handler so we can store a device_t in an ACPI_HANDLE. 1817 */ 1818 void 1819 acpi_fake_objhandler(ACPI_HANDLE h, void *data) 1820 { 1821 } 1822 1823 static void 1824 acpi_shutdown_final(void *arg, int howto) 1825 { 1826 struct acpi_softc *sc; 1827 ACPI_STATUS status; 1828 1829 /* 1830 * XXX Shutdown code should only run on the BSP (cpuid 0). 1831 * Some chipsets do not power off the system correctly if called from 1832 * an AP. 1833 */ 1834 sc = arg; 1835 if ((howto & RB_POWEROFF) != 0) { 1836 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 1837 if (ACPI_FAILURE(status)) { 1838 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 1839 AcpiFormatException(status)); 1840 return; 1841 } 1842 device_printf(sc->acpi_dev, "Powering system off\n"); 1843 ACPI_DISABLE_IRQS(); 1844 status = AcpiEnterSleepState(ACPI_STATE_S5); 1845 if (ACPI_FAILURE(status)) { 1846 device_printf(sc->acpi_dev, "power-off failed - %s\n", 1847 AcpiFormatException(status)); 1848 } else { 1849 DELAY(1000000); 1850 device_printf(sc->acpi_dev, "power-off failed - timeout\n"); 1851 } 1852 } else if ((howto & RB_HALT) == 0 && sc->acpi_handle_reboot) { 1853 /* Reboot using the reset register. */ 1854 status = AcpiReset(); 1855 if (ACPI_FAILURE(status)) { 1856 if (status != AE_NOT_EXIST) 1857 device_printf(sc->acpi_dev, "reset failed - %s\n", 1858 AcpiFormatException(status)); 1859 } else { 1860 DELAY(1000000); 1861 device_printf(sc->acpi_dev, "reset failed - timeout\n"); 1862 } 1863 } else if (sc->acpi_do_disable && panicstr == NULL) { 1864 /* 1865 * Only disable ACPI if the user requested. On some systems, writing 1866 * the disable value to SMI_CMD hangs the system. 1867 */ 1868 device_printf(sc->acpi_dev, "Shutting down\n"); 1869 AcpiTerminate(); 1870 } 1871 } 1872 1873 static void 1874 acpi_enable_fixed_events(struct acpi_softc *sc) 1875 { 1876 static int first_time = 1; 1877 1878 /* Enable and clear fixed events and install handlers. */ 1879 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) { 1880 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 1881 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 1882 acpi_event_power_button_sleep, sc); 1883 if (first_time) 1884 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 1885 } 1886 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) { 1887 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 1888 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 1889 acpi_event_sleep_button_sleep, sc); 1890 if (first_time) 1891 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 1892 } 1893 1894 first_time = 0; 1895 } 1896 1897 /* 1898 * Returns true if the device is actually present and should 1899 * be attached to. This requires the present, enabled, UI-visible 1900 * and diagnostics-passed bits to be set. 1901 */ 1902 BOOLEAN 1903 acpi_DeviceIsPresent(device_t dev) 1904 { 1905 ACPI_DEVICE_INFO *devinfo; 1906 ACPI_HANDLE h; 1907 int ret; 1908 1909 ret = FALSE; 1910 if ((h = acpi_get_handle(dev)) == NULL || 1911 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1912 return (FALSE); 1913 1914 /* If no _STA method, must be present */ 1915 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1916 ret = TRUE; 1917 1918 /* Return true for 'present' and 'functioning' */ 1919 if (ACPI_DEVICE_PRESENT(devinfo->CurrentStatus)) 1920 ret = TRUE; 1921 1922 AcpiOsFree(devinfo); 1923 return (ret); 1924 } 1925 1926 /* 1927 * Returns true if the battery is actually present and inserted. 1928 */ 1929 BOOLEAN 1930 acpi_BatteryIsPresent(device_t dev) 1931 { 1932 ACPI_DEVICE_INFO *devinfo; 1933 ACPI_HANDLE h; 1934 int ret; 1935 1936 ret = FALSE; 1937 if ((h = acpi_get_handle(dev)) == NULL || 1938 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1939 return (FALSE); 1940 1941 /* If no _STA method, must be present */ 1942 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1943 ret = TRUE; 1944 1945 /* Return true for 'present', 'battery present', and 'functioning' */ 1946 if (ACPI_BATTERY_PRESENT(devinfo->CurrentStatus)) 1947 ret = TRUE; 1948 1949 AcpiOsFree(devinfo); 1950 return (ret); 1951 } 1952 1953 /* 1954 * Match a HID string against a handle 1955 */ 1956 BOOLEAN 1957 acpi_MatchHid(ACPI_HANDLE h, const char *hid) 1958 { 1959 ACPI_DEVICE_INFO *devinfo; 1960 int ret, i; 1961 1962 ret = FALSE; 1963 if (hid == NULL || h == NULL || 1964 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1965 return (ret); 1966 1967 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 1968 strcmp(hid, devinfo->HardwareId.String) == 0) 1969 ret = TRUE; 1970 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) { 1971 for (i = 0; i < devinfo->CompatibleIdList.Count; i++) { 1972 if (strcmp(hid, devinfo->CompatibleIdList.Ids[i].String) == 0) { 1973 ret = TRUE; 1974 break; 1975 } 1976 } 1977 } 1978 1979 AcpiOsFree(devinfo); 1980 return (ret); 1981 } 1982 1983 /* 1984 * Match a UID string against a handle 1985 */ 1986 BOOLEAN 1987 acpi_MatchUid(ACPI_HANDLE h, const char *uid) 1988 { 1989 ACPI_DEVICE_INFO *devinfo; 1990 int ret; 1991 1992 ret = FALSE; 1993 if (uid == NULL || h == NULL || 1994 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1995 return (ret); 1996 1997 if ((devinfo->Valid & ACPI_VALID_UID) != 0 && 1998 strcmp(uid, devinfo->UniqueId.String) == 0) 1999 ret = TRUE; 2000 2001 AcpiOsFree(devinfo); 2002 return (ret); 2003 } 2004 2005 /* 2006 * Return the handle of a named object within our scope, ie. that of (parent) 2007 * or one if its parents. 2008 */ 2009 ACPI_STATUS 2010 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 2011 { 2012 ACPI_HANDLE r; 2013 ACPI_STATUS status; 2014 2015 /* Walk back up the tree to the root */ 2016 for (;;) { 2017 status = AcpiGetHandle(parent, path, &r); 2018 if (ACPI_SUCCESS(status)) { 2019 *result = r; 2020 return (AE_OK); 2021 } 2022 /* XXX Return error here? */ 2023 if (status != AE_NOT_FOUND) 2024 return (AE_OK); 2025 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 2026 return (AE_NOT_FOUND); 2027 parent = r; 2028 } 2029 } 2030 2031 /* 2032 * Allocate a buffer with a preset data size. 2033 */ 2034 ACPI_BUFFER * 2035 acpi_AllocBuffer(int size) 2036 { 2037 ACPI_BUFFER *buf; 2038 2039 if ((buf = kmalloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 2040 return (NULL); 2041 buf->Length = size; 2042 buf->Pointer = (void *)(buf + 1); 2043 return (buf); 2044 } 2045 2046 ACPI_STATUS 2047 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 2048 { 2049 ACPI_OBJECT arg1; 2050 ACPI_OBJECT_LIST args; 2051 2052 arg1.Type = ACPI_TYPE_INTEGER; 2053 arg1.Integer.Value = number; 2054 args.Count = 1; 2055 args.Pointer = &arg1; 2056 2057 return (AcpiEvaluateObject(handle, path, &args, NULL)); 2058 } 2059 2060 /* 2061 * Evaluate a path that should return an integer. 2062 */ 2063 ACPI_STATUS 2064 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 2065 { 2066 ACPI_STATUS status; 2067 ACPI_BUFFER buf; 2068 ACPI_OBJECT param; 2069 2070 if (handle == NULL) 2071 handle = ACPI_ROOT_OBJECT; 2072 2073 /* 2074 * Assume that what we've been pointed at is an Integer object, or 2075 * a method that will return an Integer. 2076 */ 2077 buf.Pointer = ¶m; 2078 buf.Length = sizeof(param); 2079 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2080 if (ACPI_SUCCESS(status)) { 2081 if (param.Type == ACPI_TYPE_INTEGER) 2082 *number = param.Integer.Value; 2083 else 2084 status = AE_TYPE; 2085 } 2086 2087 /* 2088 * In some applications, a method that's expected to return an Integer 2089 * may instead return a Buffer (probably to simplify some internal 2090 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 2091 * convert it into an Integer as best we can. 2092 * 2093 * This is a hack. 2094 */ 2095 if (status == AE_BUFFER_OVERFLOW) { 2096 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 2097 status = AE_NO_MEMORY; 2098 } else { 2099 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2100 if (ACPI_SUCCESS(status)) 2101 status = acpi_ConvertBufferToInteger(&buf, number); 2102 AcpiOsFree(buf.Pointer); 2103 } 2104 } 2105 return (status); 2106 } 2107 2108 ACPI_STATUS 2109 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 2110 { 2111 ACPI_OBJECT *p; 2112 UINT8 *val; 2113 int i; 2114 2115 p = (ACPI_OBJECT *)bufp->Pointer; 2116 if (p->Type == ACPI_TYPE_INTEGER) { 2117 *number = p->Integer.Value; 2118 return (AE_OK); 2119 } 2120 if (p->Type != ACPI_TYPE_BUFFER) 2121 return (AE_TYPE); 2122 if (p->Buffer.Length > sizeof(int)) 2123 return (AE_BAD_DATA); 2124 2125 *number = 0; 2126 val = p->Buffer.Pointer; 2127 for (i = 0; i < p->Buffer.Length; i++) 2128 *number += val[i] << (i * 8); 2129 return (AE_OK); 2130 } 2131 2132 /* 2133 * Iterate over the elements of an a package object, calling the supplied 2134 * function for each element. 2135 * 2136 * XXX possible enhancement might be to abort traversal on error. 2137 */ 2138 ACPI_STATUS 2139 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 2140 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 2141 { 2142 ACPI_OBJECT *comp; 2143 int i; 2144 2145 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 2146 return (AE_BAD_PARAMETER); 2147 2148 /* Iterate over components */ 2149 i = 0; 2150 comp = pkg->Package.Elements; 2151 for (; i < pkg->Package.Count; i++, comp++) 2152 func(comp, arg); 2153 2154 return (AE_OK); 2155 } 2156 2157 /* 2158 * Find the (index)th resource object in a set. 2159 */ 2160 ACPI_STATUS 2161 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 2162 { 2163 ACPI_RESOURCE *rp; 2164 int i; 2165 2166 rp = (ACPI_RESOURCE *)buf->Pointer; 2167 i = index; 2168 while (i-- > 0) { 2169 /* Range check */ 2170 if (rp > (ACPI_RESOURCE *)((uint8_t *)buf->Pointer + buf->Length)) 2171 return (AE_BAD_PARAMETER); 2172 2173 /* Check for terminator */ 2174 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2175 return (AE_NOT_FOUND); 2176 rp = ACPI_NEXT_RESOURCE(rp); 2177 } 2178 if (resp != NULL) 2179 *resp = rp; 2180 2181 return (AE_OK); 2182 } 2183 2184 /* 2185 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 2186 * 2187 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 2188 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 2189 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 2190 * resources. 2191 */ 2192 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 2193 2194 ACPI_STATUS 2195 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 2196 { 2197 ACPI_RESOURCE *rp; 2198 void *newp; 2199 2200 /* Initialise the buffer if necessary. */ 2201 if (buf->Pointer == NULL) { 2202 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 2203 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 2204 return (AE_NO_MEMORY); 2205 rp = (ACPI_RESOURCE *)buf->Pointer; 2206 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2207 rp->Length = ACPI_RS_SIZE_MIN; 2208 } 2209 if (res == NULL) 2210 return (AE_OK); 2211 2212 /* 2213 * Scan the current buffer looking for the terminator. 2214 * This will either find the terminator or hit the end 2215 * of the buffer and return an error. 2216 */ 2217 rp = (ACPI_RESOURCE *)buf->Pointer; 2218 for (;;) { 2219 /* Range check, don't go outside the buffer */ 2220 if (rp >= (ACPI_RESOURCE *)((uint8_t *)buf->Pointer + buf->Length)) 2221 return (AE_BAD_PARAMETER); 2222 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2223 break; 2224 rp = ACPI_NEXT_RESOURCE(rp); 2225 } 2226 2227 /* 2228 * Check the size of the buffer and expand if required. 2229 * 2230 * Required size is: 2231 * size of existing resources before terminator + 2232 * size of new resource and header + 2233 * size of terminator. 2234 * 2235 * Note that this loop should really only run once, unless 2236 * for some reason we are stuffing a *really* huge resource. 2237 */ 2238 while ((((uint8_t *)rp - (uint8_t *)buf->Pointer) + 2239 res->Length + ACPI_RS_SIZE_NO_DATA + 2240 ACPI_RS_SIZE_MIN) >= buf->Length) { 2241 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 2242 return (AE_NO_MEMORY); 2243 bcopy(buf->Pointer, newp, buf->Length); 2244 rp = (ACPI_RESOURCE *)((uint8_t *)newp + 2245 ((uint8_t *)rp - (uint8_t *)buf->Pointer)); 2246 AcpiOsFree(buf->Pointer); 2247 buf->Pointer = newp; 2248 buf->Length += buf->Length; 2249 } 2250 2251 /* Insert the new resource. */ 2252 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA); 2253 2254 /* And add the terminator. */ 2255 rp = ACPI_NEXT_RESOURCE(rp); 2256 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2257 rp->Length = ACPI_RS_SIZE_MIN; 2258 2259 return (AE_OK); 2260 } 2261 2262 /* 2263 * Set interrupt model. 2264 */ 2265 ACPI_STATUS 2266 acpi_SetIntrModel(int model) 2267 { 2268 2269 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 2270 } 2271 2272 /* 2273 * DEPRECATED. This interface has serious deficiencies and will be 2274 * removed. 2275 * 2276 * Immediately enter the sleep state. In the old model, acpiconf(8) ran 2277 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this. 2278 */ 2279 ACPI_STATUS 2280 acpi_SetSleepState(struct acpi_softc *sc, int state) 2281 { 2282 static int once; 2283 2284 if (!once) { 2285 device_printf(sc->acpi_dev, 2286 "warning: acpi_SetSleepState() deprecated, need to update your software\n"); 2287 once = 1; 2288 } 2289 return (acpi_EnterSleepState(sc, state)); 2290 } 2291 2292 static void 2293 acpi_sleep_force(void *arg) 2294 { 2295 struct acpi_softc *sc; 2296 2297 sc = arg; 2298 device_printf(sc->acpi_dev, 2299 "suspend request timed out, forcing sleep now\n"); 2300 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2301 device_printf(sc->acpi_dev, "force sleep state S%d failed\n", 2302 sc->acpi_next_sstate); 2303 } 2304 2305 /* 2306 * Request that the system enter the given suspend state. All /dev/apm 2307 * devices and devd(8) will be notified. Userland then has a chance to 2308 * save state and acknowledge the request. The system sleeps once all 2309 * acks are in. 2310 */ 2311 int 2312 acpi_ReqSleepState(struct acpi_softc *sc, int state) 2313 { 2314 #ifdef notyet 2315 struct apm_clone_data *clone; 2316 #endif 2317 2318 if (state < ACPI_STATE_S1 || state > ACPI_STATE_S5) 2319 return (EINVAL); 2320 2321 /* S5 (soft-off) should be entered directly with no waiting. */ 2322 if (state == ACPI_STATE_S5) { 2323 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, state))) 2324 return (0); 2325 else 2326 return (ENXIO); 2327 } 2328 2329 /* This platform does not support acpi suspend/resume. */ 2330 return (EOPNOTSUPP); 2331 2332 /* If a suspend request is already in progress, just return. */ 2333 ACPI_LOCK(acpi); 2334 if (sc->acpi_next_sstate != 0) { 2335 ACPI_UNLOCK(acpi); 2336 return (0); 2337 } 2338 2339 /* Record the pending state and notify all apm devices. */ 2340 sc->acpi_next_sstate = state; 2341 #if 0 2342 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2343 clone->notify_status = APM_EV_NONE; 2344 if ((clone->flags & ACPI_EVF_DEVD) == 0) { 2345 KNOTE(&clone->sel_read.si_note, 0); 2346 } 2347 } 2348 #endif 2349 2350 /* If devd(8) is not running, immediately enter the sleep state. */ 2351 if (devctl_process_running() == FALSE) { 2352 ACPI_UNLOCK(acpi); 2353 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) { 2354 return (0); 2355 } else { 2356 return (ENXIO); 2357 } 2358 } 2359 2360 /* Now notify devd(8) also. */ 2361 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state); 2362 2363 /* 2364 * Set a timeout to fire if userland doesn't ack the suspend request 2365 * in time. This way we still eventually go to sleep if we were 2366 * overheating or running low on battery, even if userland is hung. 2367 * We cancel this timeout once all userland acks are in or the 2368 * suspend request is aborted. 2369 */ 2370 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc); 2371 ACPI_UNLOCK(acpi); 2372 2373 return (0); 2374 } 2375 2376 /* 2377 * Acknowledge (or reject) a pending sleep state. The caller has 2378 * prepared for suspend and is now ready for it to proceed. If the 2379 * error argument is non-zero, it indicates suspend should be cancelled 2380 * and gives an errno value describing why. Once all votes are in, 2381 * we suspend the system. 2382 */ 2383 int 2384 acpi_AckSleepState(struct apm_clone_data *clone, int error) 2385 { 2386 struct acpi_softc *sc; 2387 int ret, sleeping; 2388 2389 /* This platform does not support acpi suspend/resume. */ 2390 return (EOPNOTSUPP); 2391 2392 /* If no pending sleep state, return an error. */ 2393 ACPI_LOCK(acpi); 2394 sc = clone->acpi_sc; 2395 if (sc->acpi_next_sstate == 0) { 2396 ACPI_UNLOCK(acpi); 2397 return (ENXIO); 2398 } 2399 2400 /* Caller wants to abort suspend process. */ 2401 if (error) { 2402 sc->acpi_next_sstate = 0; 2403 callout_stop(&sc->susp_force_to); 2404 device_printf(sc->acpi_dev, 2405 "listener on %s cancelled the pending suspend\n", 2406 devtoname(clone->cdev)); 2407 ACPI_UNLOCK(acpi); 2408 return (0); 2409 } 2410 2411 /* 2412 * Mark this device as acking the suspend request. Then, walk through 2413 * all devices, seeing if they agree yet. We only count devices that 2414 * are writable since read-only devices couldn't ack the request. 2415 */ 2416 clone->notify_status = APM_EV_ACKED; 2417 sleeping = TRUE; 2418 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2419 if ((clone->flags & ACPI_EVF_WRITE) != 0 && 2420 clone->notify_status != APM_EV_ACKED) { 2421 sleeping = FALSE; 2422 break; 2423 } 2424 } 2425 2426 /* If all devices have voted "yes", we will suspend now. */ 2427 if (sleeping) 2428 callout_stop(&sc->susp_force_to); 2429 ACPI_UNLOCK(acpi); 2430 ret = 0; 2431 if (sleeping) { 2432 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2433 ret = ENODEV; 2434 } 2435 2436 return (ret); 2437 } 2438 2439 static void 2440 acpi_sleep_enable(void *arg) 2441 { 2442 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0; 2443 } 2444 2445 enum acpi_sleep_state { 2446 ACPI_SS_NONE, 2447 ACPI_SS_GPE_SET, 2448 ACPI_SS_DEV_SUSPEND, 2449 ACPI_SS_SLP_PREP, 2450 ACPI_SS_SLEPT, 2451 }; 2452 2453 /* 2454 * Enter the desired system sleep state. 2455 * 2456 * Currently we support S1-S5 but S4 is only S4BIOS 2457 */ 2458 static ACPI_STATUS 2459 acpi_EnterSleepState(struct acpi_softc *sc, int state) 2460 { 2461 ACPI_STATUS status; 2462 UINT8 TypeA; 2463 UINT8 TypeB; 2464 enum acpi_sleep_state slp_state; 2465 2466 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2467 2468 /* Re-entry once we're suspending is not allowed. */ 2469 status = AE_OK; 2470 ACPI_LOCK(acpi); 2471 if (sc->acpi_sleep_disabled) { 2472 ACPI_UNLOCK(acpi); 2473 device_printf(sc->acpi_dev, 2474 "suspend request ignored (not ready yet)\n"); 2475 return (AE_ERROR); 2476 } 2477 sc->acpi_sleep_disabled = 1; 2478 ACPI_UNLOCK(acpi); 2479 2480 /* 2481 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE 2482 * drivers need this. 2483 */ 2484 //get_mplock(); 2485 2486 slp_state = ACPI_SS_NONE; 2487 switch (state) { 2488 case ACPI_STATE_S1: 2489 case ACPI_STATE_S2: 2490 case ACPI_STATE_S3: 2491 case ACPI_STATE_S4: 2492 status = AcpiGetSleepTypeData(state, &TypeA, &TypeB); 2493 if (status == AE_NOT_FOUND) { 2494 device_printf(sc->acpi_dev, 2495 "Sleep state S%d not supported by BIOS\n", state); 2496 break; 2497 } else if (ACPI_FAILURE(status)) { 2498 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n", 2499 AcpiFormatException(status)); 2500 break; 2501 } 2502 2503 sc->acpi_sstate = state; 2504 2505 /* Enable any GPEs as appropriate and requested by the user. */ 2506 acpi_wake_prep_walk(state); 2507 slp_state = ACPI_SS_GPE_SET; 2508 2509 /* 2510 * Inform all devices that we are going to sleep. If at least one 2511 * device fails, DEVICE_SUSPEND() automatically resumes the tree. 2512 * 2513 * XXX Note that a better two-pass approach with a 'veto' pass 2514 * followed by a "real thing" pass would be better, but the current 2515 * bus interface does not provide for this. 2516 */ 2517 if (DEVICE_SUSPEND(root_bus) != 0) { 2518 device_printf(sc->acpi_dev, "device_suspend failed\n"); 2519 break; 2520 } 2521 slp_state = ACPI_SS_DEV_SUSPEND; 2522 2523 /* If testing device suspend only, back out of everything here. */ 2524 if (acpi_susp_bounce) 2525 break; 2526 2527 status = AcpiEnterSleepStatePrep(state); 2528 if (ACPI_FAILURE(status)) { 2529 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2530 AcpiFormatException(status)); 2531 break; 2532 } 2533 slp_state = ACPI_SS_SLP_PREP; 2534 2535 if (sc->acpi_sleep_delay > 0) 2536 DELAY(sc->acpi_sleep_delay * 1000000); 2537 2538 if (state != ACPI_STATE_S1) { 2539 acpi_sleep_machdep(sc, state); 2540 2541 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 2542 if (state == ACPI_STATE_S4) 2543 AcpiEnable(); 2544 } else { 2545 ACPI_DISABLE_IRQS(); 2546 status = AcpiEnterSleepState(state); 2547 if (ACPI_FAILURE(status)) { 2548 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 2549 AcpiFormatException(status)); 2550 break; 2551 } 2552 } 2553 slp_state = ACPI_SS_SLEPT; 2554 break; 2555 case ACPI_STATE_S5: 2556 /* 2557 * Shut down cleanly and power off. This will call us back through the 2558 * shutdown handlers. 2559 */ 2560 shutdown_nice(RB_POWEROFF); 2561 break; 2562 case ACPI_STATE_S0: 2563 default: 2564 status = AE_BAD_PARAMETER; 2565 break; 2566 } 2567 2568 /* 2569 * Back out state according to how far along we got in the suspend 2570 * process. This handles both the error and success cases. 2571 */ 2572 sc->acpi_next_sstate = 0; 2573 if (slp_state >= ACPI_SS_GPE_SET) { 2574 acpi_wake_prep_walk(state); 2575 sc->acpi_sstate = ACPI_STATE_S0; 2576 } 2577 if (slp_state >= ACPI_SS_SLP_PREP) 2578 AcpiLeaveSleepState(state); 2579 if (slp_state >= ACPI_SS_DEV_SUSPEND) 2580 DEVICE_RESUME(root_bus); 2581 if (slp_state >= ACPI_SS_SLEPT) 2582 acpi_enable_fixed_events(sc); 2583 2584 /* Allow another sleep request after a while. */ 2585 /* XXX: needs timeout */ 2586 if (state != ACPI_STATE_S5) 2587 acpi_sleep_enable(sc); 2588 2589 /* Run /etc/rc.resume after we are back. */ 2590 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state); 2591 2592 //rel_mplock(); 2593 2594 return_ACPI_STATUS (status); 2595 } 2596 2597 /* Enable or disable the device's GPE. */ 2598 int 2599 acpi_wake_set_enable(device_t dev, int enable) 2600 { 2601 struct acpi_prw_data prw; 2602 ACPI_STATUS status; 2603 int flags; 2604 2605 /* Make sure the device supports waking the system and get the GPE. */ 2606 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 2607 return (ENXIO); 2608 2609 flags = acpi_get_flags(dev); 2610 if (enable) { 2611 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 2612 ACPI_GPE_ENABLE); 2613 if (ACPI_FAILURE(status)) { 2614 device_printf(dev, "enable wake failed\n"); 2615 return (ENXIO); 2616 } 2617 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); 2618 } else { 2619 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 2620 ACPI_GPE_DISABLE); 2621 if (ACPI_FAILURE(status)) { 2622 device_printf(dev, "disable wake failed\n"); 2623 return (ENXIO); 2624 } 2625 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); 2626 } 2627 2628 return (0); 2629 } 2630 2631 static int 2632 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate) 2633 { 2634 struct acpi_prw_data prw; 2635 device_t dev; 2636 2637 /* Check that this is a wake-capable device and get its GPE. */ 2638 if (acpi_parse_prw(handle, &prw) != 0) 2639 return (ENXIO); 2640 dev = acpi_get_device(handle); 2641 2642 /* 2643 * The destination sleep state must be less than (i.e., higher power) 2644 * or equal to the value specified by _PRW. If this GPE cannot be 2645 * enabled for the next sleep state, then disable it. If it can and 2646 * the user requested it be enabled, turn on any required power resources 2647 * and set _PSW. 2648 */ 2649 if (sstate > prw.lowest_wake) { 2650 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_DISABLE); 2651 if (bootverbose) 2652 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n", 2653 acpi_name(handle), sstate); 2654 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) { 2655 acpi_pwr_wake_enable(handle, 1); 2656 acpi_SetInteger(handle, "_PSW", 1); 2657 if (bootverbose) 2658 device_printf(dev, "wake_prep enabled for %s (S%d)\n", 2659 acpi_name(handle), sstate); 2660 } 2661 2662 return (0); 2663 } 2664 2665 static int 2666 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate) 2667 { 2668 struct acpi_prw_data prw; 2669 device_t dev; 2670 2671 /* 2672 * Check that this is a wake-capable device and get its GPE. Return 2673 * now if the user didn't enable this device for wake. 2674 */ 2675 if (acpi_parse_prw(handle, &prw) != 0) 2676 return (ENXIO); 2677 dev = acpi_get_device(handle); 2678 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0) 2679 return (0); 2680 2681 /* 2682 * If this GPE couldn't be enabled for the previous sleep state, it was 2683 * disabled before going to sleep so re-enable it. If it was enabled, 2684 * clear _PSW and turn off any power resources it used. 2685 */ 2686 if (sstate > prw.lowest_wake) { 2687 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_ENABLE); 2688 if (bootverbose) 2689 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle)); 2690 } else { 2691 acpi_SetInteger(handle, "_PSW", 0); 2692 acpi_pwr_wake_enable(handle, 0); 2693 if (bootverbose) 2694 device_printf(dev, "run_prep cleaned up for %s\n", 2695 acpi_name(handle)); 2696 } 2697 2698 return (0); 2699 } 2700 2701 static ACPI_STATUS 2702 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 2703 { 2704 int sstate; 2705 2706 /* If suspending, run the sleep prep function, otherwise wake. */ 2707 sstate = *(int *)context; 2708 if (AcpiGbl_SystemAwakeAndRunning) 2709 acpi_wake_sleep_prep(handle, sstate); 2710 else 2711 acpi_wake_run_prep(handle, sstate); 2712 return (AE_OK); 2713 } 2714 2715 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */ 2716 static int 2717 acpi_wake_prep_walk(int sstate) 2718 { 2719 ACPI_HANDLE sb_handle; 2720 2721 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) { 2722 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100, 2723 acpi_wake_prep, NULL, &sstate, NULL); 2724 } 2725 return (0); 2726 } 2727 2728 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */ 2729 static int 2730 acpi_wake_sysctl_walk(device_t dev) 2731 { 2732 #ifdef notyet 2733 int error, i, numdevs; 2734 device_t *devlist; 2735 device_t child; 2736 ACPI_STATUS status; 2737 2738 error = device_get_children(dev, &devlist, &numdevs); 2739 if (error != 0 || numdevs == 0) { 2740 if (numdevs == 0) 2741 kfree(devlist, M_TEMP); 2742 return (error); 2743 } 2744 for (i = 0; i < numdevs; i++) { 2745 child = devlist[i]; 2746 acpi_wake_sysctl_walk(child); 2747 if (!device_is_attached(child)) 2748 continue; 2749 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL); 2750 if (ACPI_SUCCESS(status)) { 2751 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child), 2752 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO, 2753 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0, 2754 acpi_wake_set_sysctl, "I", "Device set to wake the system"); 2755 } 2756 } 2757 kfree(devlist, M_TEMP); 2758 #endif 2759 2760 return (0); 2761 } 2762 2763 #ifdef notyet 2764 /* Enable or disable wake from userland. */ 2765 static int 2766 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS) 2767 { 2768 int enable, error; 2769 device_t dev; 2770 2771 dev = (device_t)arg1; 2772 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0; 2773 2774 error = sysctl_handle_int(oidp, &enable, 0, req); 2775 if (error != 0 || req->newptr == NULL) 2776 return (error); 2777 if (enable != 0 && enable != 1) 2778 return (EINVAL); 2779 2780 return (acpi_wake_set_enable(dev, enable)); 2781 } 2782 #endif 2783 2784 /* Parse a device's _PRW into a structure. */ 2785 int 2786 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) 2787 { 2788 ACPI_STATUS status; 2789 ACPI_BUFFER prw_buffer; 2790 ACPI_OBJECT *res, *res2; 2791 int error, i, power_count; 2792 2793 if (h == NULL || prw == NULL) 2794 return (EINVAL); 2795 2796 /* 2797 * The _PRW object (7.2.9) is only required for devices that have the 2798 * ability to wake the system from a sleeping state. 2799 */ 2800 error = EINVAL; 2801 prw_buffer.Pointer = NULL; 2802 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 2803 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 2804 if (ACPI_FAILURE(status)) 2805 return (ENOENT); 2806 res = (ACPI_OBJECT *)prw_buffer.Pointer; 2807 if (res == NULL) 2808 return (ENOENT); 2809 if (!ACPI_PKG_VALID(res, 2)) 2810 goto out; 2811 2812 /* 2813 * Element 1 of the _PRW object: 2814 * The lowest power system sleeping state that can be entered while still 2815 * providing wake functionality. The sleeping state being entered must 2816 * be less than (i.e., higher power) or equal to this value. 2817 */ 2818 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) 2819 goto out; 2820 2821 /* 2822 * Element 0 of the _PRW object: 2823 */ 2824 switch (res->Package.Elements[0].Type) { 2825 case ACPI_TYPE_INTEGER: 2826 /* 2827 * If the data type of this package element is numeric, then this 2828 * _PRW package element is the bit index in the GPEx_EN, in the 2829 * GPE blocks described in the FADT, of the enable bit that is 2830 * enabled for the wake event. 2831 */ 2832 prw->gpe_handle = NULL; 2833 prw->gpe_bit = res->Package.Elements[0].Integer.Value; 2834 error = 0; 2835 break; 2836 case ACPI_TYPE_PACKAGE: 2837 /* 2838 * If the data type of this package element is a package, then this 2839 * _PRW package element is itself a package containing two 2840 * elements. The first is an object reference to the GPE Block 2841 * device that contains the GPE that will be triggered by the wake 2842 * event. The second element is numeric and it contains the bit 2843 * index in the GPEx_EN, in the GPE Block referenced by the 2844 * first element in the package, of the enable bit that is enabled for 2845 * the wake event. 2846 * 2847 * For example, if this field is a package then it is of the form: 2848 * Package() {\_SB.PCI0.ISA.GPE, 2} 2849 */ 2850 res2 = &res->Package.Elements[0]; 2851 if (!ACPI_PKG_VALID(res2, 2)) 2852 goto out; 2853 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 2854 if (prw->gpe_handle == NULL) 2855 goto out; 2856 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) 2857 goto out; 2858 error = 0; 2859 break; 2860 default: 2861 goto out; 2862 } 2863 2864 /* Elements 2 to N of the _PRW object are power resources. */ 2865 power_count = res->Package.Count - 2; 2866 if (power_count > ACPI_PRW_MAX_POWERRES) { 2867 kprintf("ACPI device %s has too many power resources\n", acpi_name(h)); 2868 power_count = 0; 2869 } 2870 prw->power_res_count = power_count; 2871 for (i = 0; i < power_count; i++) 2872 prw->power_res[i] = res->Package.Elements[i]; 2873 2874 out: 2875 if (prw_buffer.Pointer != NULL) 2876 AcpiOsFree(prw_buffer.Pointer); 2877 return (error); 2878 } 2879 2880 /* 2881 * ACPI Event Handlers 2882 */ 2883 2884 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 2885 2886 static void 2887 acpi_system_eventhandler_sleep(void *arg, int state) 2888 { 2889 struct acpi_softc *sc; 2890 int ret; 2891 2892 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2893 2894 sc = arg; 2895 2896 /* Check if button action is disabled. */ 2897 if (state == ACPI_S_STATES_MAX + 1) 2898 return; 2899 2900 /* Request that the system prepare to enter the given suspend state. */ 2901 ret = acpi_ReqSleepState((struct acpi_softc *)arg, state); 2902 if (ret != 0) 2903 device_printf(sc->acpi_dev, 2904 "request to enter state S%d failed (err %d)\n", state, ret); 2905 2906 return_VOID; 2907 } 2908 2909 static void 2910 acpi_system_eventhandler_wakeup(void *arg, int state) 2911 { 2912 2913 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2914 2915 /* Currently, nothing to do for wakeup. */ 2916 2917 return_VOID; 2918 } 2919 2920 /* 2921 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 2922 */ 2923 UINT32 2924 acpi_event_power_button_sleep(void *context) 2925 { 2926 struct acpi_softc *sc = (struct acpi_softc *)context; 2927 2928 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2929 2930 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 2931 2932 return_VALUE (ACPI_INTERRUPT_HANDLED); 2933 } 2934 2935 UINT32 2936 acpi_event_power_button_wake(void *context) 2937 { 2938 struct acpi_softc *sc = (struct acpi_softc *)context; 2939 2940 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2941 2942 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 2943 2944 return_VALUE (ACPI_INTERRUPT_HANDLED); 2945 } 2946 2947 UINT32 2948 acpi_event_sleep_button_sleep(void *context) 2949 { 2950 struct acpi_softc *sc = (struct acpi_softc *)context; 2951 2952 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2953 2954 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 2955 2956 return_VALUE (ACPI_INTERRUPT_HANDLED); 2957 } 2958 2959 UINT32 2960 acpi_event_sleep_button_wake(void *context) 2961 { 2962 struct acpi_softc *sc = (struct acpi_softc *)context; 2963 2964 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2965 2966 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 2967 2968 return_VALUE (ACPI_INTERRUPT_HANDLED); 2969 } 2970 2971 /* 2972 * XXX This static buffer is suboptimal. There is no locking so only 2973 * use this for single-threaded callers. 2974 */ 2975 char * 2976 acpi_name(ACPI_HANDLE handle) 2977 { 2978 ACPI_BUFFER buf; 2979 static char data[256]; 2980 2981 buf.Length = sizeof(data); 2982 buf.Pointer = data; 2983 2984 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf))) 2985 return (data); 2986 return ("(unknown)"); 2987 } 2988 2989 /* 2990 * Debugging/bug-avoidance. Avoid trying to fetch info on various 2991 * parts of the namespace. 2992 */ 2993 int 2994 acpi_avoid(ACPI_HANDLE handle) 2995 { 2996 char *cp, *env, *np; 2997 int len; 2998 2999 np = acpi_name(handle); 3000 if (*np == '\\') 3001 np++; 3002 if ((env = kgetenv("debug.acpi.avoid")) == NULL) 3003 return (0); 3004 3005 /* Scan the avoid list checking for a match */ 3006 cp = env; 3007 for (;;) { 3008 while (*cp != 0 && isspace(*cp)) 3009 cp++; 3010 if (*cp == 0) 3011 break; 3012 len = 0; 3013 while (cp[len] != 0 && !isspace(cp[len])) 3014 len++; 3015 if (!strncmp(cp, np, len)) { 3016 kfreeenv(env); 3017 return(1); 3018 } 3019 cp += len; 3020 } 3021 kfreeenv(env); 3022 3023 return (0); 3024 } 3025 3026 /* 3027 * Debugging/bug-avoidance. Disable ACPI subsystem components. 3028 */ 3029 int 3030 acpi_disabled(char *subsys) 3031 { 3032 char *cp, *env; 3033 int len; 3034 3035 if ((env = kgetenv("debug.acpi.disabled")) == NULL) 3036 return (0); 3037 if (strcmp(env, "all") == 0) { 3038 kfreeenv(env); 3039 return (1); 3040 } 3041 3042 /* Scan the disable list, checking for a match. */ 3043 cp = env; 3044 for (;;) { 3045 while (*cp != '\0' && isspace(*cp)) 3046 cp++; 3047 if (*cp == '\0') 3048 break; 3049 len = 0; 3050 while (cp[len] != '\0' && !isspace(cp[len])) 3051 len++; 3052 if (strncmp(cp, subsys, len) == 0) { 3053 kfreeenv(env); 3054 return (1); 3055 } 3056 cp += len; 3057 } 3058 kfreeenv(env); 3059 3060 return (0); 3061 } 3062 3063 /* 3064 * Debugging/bug-avoidance. Enable ACPI subsystem components. Most 3065 * components are enabled by default. The ones that are not have to be 3066 * enabled via debug.acpi.enabled. 3067 */ 3068 int 3069 acpi_enabled(char *subsys) 3070 { 3071 char *cp, *env; 3072 int len; 3073 3074 if ((env = kgetenv("debug.acpi.enabled")) == NULL) 3075 return (0); 3076 if (strcmp(env, "all") == 0) { 3077 kfreeenv(env); 3078 return (1); 3079 } 3080 3081 /* Scan the enable list, checking for a match. */ 3082 cp = env; 3083 for (;;) { 3084 while (*cp != '\0' && isspace(*cp)) 3085 cp++; 3086 if (*cp == '\0') 3087 break; 3088 len = 0; 3089 while (cp[len] != '\0' && !isspace(cp[len])) 3090 len++; 3091 if (strncmp(cp, subsys, len) == 0) { 3092 kfreeenv(env); 3093 return (1); 3094 } 3095 cp += len; 3096 } 3097 kfreeenv(env); 3098 3099 return (0); 3100 } 3101 3102 /* 3103 * Control interface. 3104 * 3105 * We multiplex ioctls for all participating ACPI devices here. Individual 3106 * drivers wanting to be accessible via /dev/acpi should use the 3107 * register/deregister interface to make their handlers visible. 3108 */ 3109 struct acpi_ioctl_hook 3110 { 3111 TAILQ_ENTRY(acpi_ioctl_hook) link; 3112 u_long cmd; 3113 acpi_ioctl_fn fn; 3114 void *arg; 3115 }; 3116 3117 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 3118 static int acpi_ioctl_hooks_initted; 3119 3120 int 3121 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 3122 { 3123 struct acpi_ioctl_hook *hp; 3124 3125 if ((hp = kmalloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 3126 return (ENOMEM); 3127 hp->cmd = cmd; 3128 hp->fn = fn; 3129 hp->arg = arg; 3130 3131 ACPI_LOCK(acpi); 3132 if (acpi_ioctl_hooks_initted == 0) { 3133 TAILQ_INIT(&acpi_ioctl_hooks); 3134 acpi_ioctl_hooks_initted = 1; 3135 } 3136 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 3137 ACPI_UNLOCK(acpi); 3138 3139 return (0); 3140 } 3141 3142 void 3143 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 3144 { 3145 struct acpi_ioctl_hook *hp; 3146 3147 ACPI_LOCK(acpi); 3148 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 3149 if (hp->cmd == cmd && hp->fn == fn) 3150 break; 3151 3152 if (hp != NULL) { 3153 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 3154 kfree(hp, M_ACPIDEV); 3155 } 3156 ACPI_UNLOCK(acpi); 3157 } 3158 3159 static int 3160 acpiopen(struct dev_open_args *ap) 3161 { 3162 return (0); 3163 } 3164 3165 static int 3166 acpiclose(struct dev_close_args *ap) 3167 { 3168 return (0); 3169 } 3170 3171 static int 3172 acpiioctl(struct dev_ioctl_args *ap) 3173 { 3174 struct acpi_softc *sc; 3175 struct acpi_ioctl_hook *hp; 3176 int error, state; 3177 3178 error = 0; 3179 hp = NULL; 3180 sc = ap->a_head.a_dev->si_drv1; 3181 3182 /* 3183 * Scan the list of registered ioctls, looking for handlers. 3184 */ 3185 lwkt_gettoken(&acpi_token); 3186 ACPI_LOCK(acpi); 3187 if (acpi_ioctl_hooks_initted) { 3188 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 3189 if (hp->cmd == ap->a_cmd) 3190 break; 3191 } 3192 } 3193 ACPI_UNLOCK(acpi); 3194 if (hp) { 3195 error = hp->fn(ap->a_cmd, ap->a_data, hp->arg); 3196 lwkt_reltoken(&acpi_token); 3197 return error; 3198 } 3199 3200 /* 3201 * Core ioctls are not permitted for non-writable user. 3202 * Currently, other ioctls just fetch information. 3203 * Not changing system behavior. 3204 */ 3205 if ((ap->a_fflag & FWRITE) == 0) { 3206 lwkt_reltoken(&acpi_token); 3207 return (EPERM); 3208 } 3209 3210 /* Core system ioctls. */ 3211 switch (ap->a_cmd) { 3212 case ACPIIO_REQSLPSTATE: 3213 state = *(int *)ap->a_data; 3214 if (state != ACPI_STATE_S5) 3215 error = acpi_ReqSleepState(sc, state); 3216 else { 3217 device_printf(sc->acpi_dev, 3218 "power off via acpi ioctl not supported\n"); 3219 error = ENXIO; 3220 } 3221 break; 3222 case ACPIIO_ACKSLPSTATE: 3223 error = EOPNOTSUPP; 3224 #if 0 /* notyet */ 3225 error = *(int *)ap->a_data; 3226 error = acpi_AckSleepState(sc->acpi_clone, error); 3227 #endif 3228 break; 3229 case ACPIIO_SETSLPSTATE: /* DEPRECATED */ 3230 error = EINVAL; 3231 state = *(int *)ap->a_data; 3232 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 3233 if (ACPI_SUCCESS(acpi_SetSleepState(sc, state))) 3234 error = 0; 3235 break; 3236 case ACPIIO_DO_MCALL: 3237 if (acpi_allow_mcall == 1) { 3238 struct acpi_mcall_ioctl_arg *params; 3239 ACPI_BUFFER result = { ACPI_ALLOCATE_BUFFER, NULL }; 3240 ACPI_OBJECT *resobj; 3241 3242 error = EINVAL; 3243 params = (struct acpi_mcall_ioctl_arg *)ap->a_data; 3244 params->retval = AcpiEvaluateObject(NULL, params->path, 3245 ¶ms->args, &result); 3246 if (ACPI_SUCCESS(params->retval) && result.Pointer != NULL && 3247 params->result.Pointer != NULL) { 3248 params->result.Length = min(params->result.Length, 3249 result.Length); 3250 copyout(result.Pointer, params->result.Pointer, 3251 params->result.Length); 3252 params->reslen = result.Length; 3253 if (result.Length >= sizeof(ACPI_OBJECT)) { 3254 resobj = (ACPI_OBJECT *)params->result.Pointer; 3255 switch (resobj->Type) { 3256 case ACPI_TYPE_STRING: 3257 resobj->String.Pointer = (char *) 3258 ((UINT8 *)(resobj->String.Pointer) - 3259 (UINT8 *)result.Pointer + 3260 (UINT8 *)resobj); 3261 break; 3262 case ACPI_TYPE_BUFFER: 3263 resobj->Buffer.Pointer -= (UINT8 *)result.Pointer - 3264 (UINT8 *)resobj; 3265 break; 3266 } 3267 } 3268 error = 0; 3269 } 3270 if (result.Pointer != NULL) 3271 AcpiOsFree(result.Pointer); 3272 } else { 3273 device_printf(sc->acpi_dev, 3274 "debug.acpi.allow_method_calls must be set\n"); 3275 error = ENXIO; 3276 } 3277 break; 3278 default: 3279 error = ENXIO; 3280 break; 3281 } 3282 lwkt_reltoken(&acpi_token); 3283 3284 return (error); 3285 } 3286 3287 static int 3288 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3289 { 3290 int error; 3291 struct sbuf sb; 3292 UINT8 state, TypeA, TypeB; 3293 3294 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND); 3295 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX + 1; state++) 3296 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) 3297 sbuf_printf(&sb, "S%d ", state); 3298 sbuf_trim(&sb); 3299 sbuf_finish(&sb); 3300 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 3301 sbuf_delete(&sb); 3302 return (error); 3303 } 3304 3305 static int 3306 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3307 { 3308 char sleep_state[10]; 3309 int error; 3310 u_int new_state, old_state; 3311 3312 old_state = *(u_int *)oidp->oid_arg1; 3313 if (old_state > ACPI_S_STATES_MAX + 1) 3314 strlcpy(sleep_state, "unknown", sizeof(sleep_state)); 3315 else 3316 strlcpy(sleep_state, sleep_state_names[old_state], sizeof(sleep_state)); 3317 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 3318 if (error == 0 && req->newptr != NULL) { 3319 new_state = ACPI_STATE_S0; 3320 for (; new_state <= ACPI_S_STATES_MAX + 1; new_state++) 3321 if (strcmp(sleep_state, sleep_state_names[new_state]) == 0) 3322 break; 3323 if (new_state <= ACPI_S_STATES_MAX + 1) { 3324 if (new_state != old_state) 3325 *(u_int *)oidp->oid_arg1 = new_state; 3326 } else 3327 error = EINVAL; 3328 } 3329 3330 return (error); 3331 } 3332 3333 /* Inform devctl(4) when we receive a Notify. */ 3334 void 3335 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 3336 { 3337 char notify_buf[16]; 3338 ACPI_BUFFER handle_buf; 3339 ACPI_STATUS status; 3340 3341 if (subsystem == NULL) 3342 return; 3343 3344 handle_buf.Pointer = NULL; 3345 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 3346 status = AcpiNsHandleToPathname(h, &handle_buf, FALSE); 3347 if (ACPI_FAILURE(status)) 3348 return; 3349 ksnprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 3350 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 3351 AcpiOsFree(handle_buf.Pointer); 3352 } 3353 3354 #ifdef ACPI_DEBUG 3355 /* 3356 * Support for parsing debug options from the kernel environment. 3357 * 3358 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 3359 * by specifying the names of the bits in the debug.acpi.layer and 3360 * debug.acpi.level environment variables. Bits may be unset by 3361 * prefixing the bit name with !. 3362 */ 3363 struct debugtag 3364 { 3365 char *name; 3366 UINT32 value; 3367 }; 3368 3369 static struct debugtag dbg_layer[] = { 3370 {"ACPI_UTILITIES", ACPI_UTILITIES}, 3371 {"ACPI_HARDWARE", ACPI_HARDWARE}, 3372 {"ACPI_EVENTS", ACPI_EVENTS}, 3373 {"ACPI_TABLES", ACPI_TABLES}, 3374 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 3375 {"ACPI_PARSER", ACPI_PARSER}, 3376 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 3377 {"ACPI_EXECUTER", ACPI_EXECUTER}, 3378 {"ACPI_RESOURCES", ACPI_RESOURCES}, 3379 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 3380 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 3381 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 3382 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 3383 3384 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 3385 {"ACPI_BATTERY", ACPI_BATTERY}, 3386 {"ACPI_BUS", ACPI_BUS}, 3387 {"ACPI_BUTTON", ACPI_BUTTON}, 3388 {"ACPI_EC", ACPI_EC}, 3389 {"ACPI_FAN", ACPI_FAN}, 3390 {"ACPI_POWERRES", ACPI_POWERRES}, 3391 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 3392 {"ACPI_THERMAL", ACPI_THERMAL}, 3393 {"ACPI_TIMER", ACPI_TIMER}, 3394 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 3395 {NULL, 0} 3396 }; 3397 3398 static struct debugtag dbg_level[] = { 3399 {"ACPI_LV_INIT", ACPI_LV_INIT}, 3400 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 3401 {"ACPI_LV_INFO", ACPI_LV_INFO}, 3402 {"ACPI_LV_REPAIR", ACPI_LV_REPAIR}, 3403 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 3404 3405 /* Trace verbosity level 1 [Standard Trace Level] */ 3406 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 3407 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 3408 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 3409 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 3410 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 3411 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 3412 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 3413 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 3414 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 3415 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 3416 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 3417 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 3418 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 3419 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 3420 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 3421 3422 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 3423 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 3424 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 3425 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 3426 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 3427 {"ACPI_LV_ALL", ACPI_LV_ALL}, 3428 3429 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 3430 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 3431 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 3432 {"ACPI_LV_IO", ACPI_LV_IO}, 3433 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 3434 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 3435 3436 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 3437 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 3438 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 3439 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 3440 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 3441 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 3442 {NULL, 0} 3443 }; 3444 3445 static void 3446 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 3447 { 3448 char *ep; 3449 int i, l; 3450 int set; 3451 3452 while (*cp) { 3453 if (isspace(*cp)) { 3454 cp++; 3455 continue; 3456 } 3457 ep = cp; 3458 while (*ep && !isspace(*ep)) 3459 ep++; 3460 if (*cp == '!') { 3461 set = 0; 3462 cp++; 3463 if (cp == ep) 3464 continue; 3465 } else { 3466 set = 1; 3467 } 3468 l = ep - cp; 3469 for (i = 0; tag[i].name != NULL; i++) { 3470 if (!strncmp(cp, tag[i].name, l)) { 3471 if (set) 3472 *flag |= tag[i].value; 3473 else 3474 *flag &= ~tag[i].value; 3475 } 3476 } 3477 cp = ep; 3478 } 3479 } 3480 3481 static void 3482 acpi_set_debugging(void *junk) 3483 { 3484 char *layer, *level; 3485 3486 if (cold) { 3487 AcpiDbgLayer = 0; 3488 AcpiDbgLevel = 0; 3489 } 3490 3491 layer = kgetenv("debug.acpi.layer"); 3492 level = kgetenv("debug.acpi.level"); 3493 if (layer == NULL && level == NULL) 3494 return; 3495 3496 kprintf("ACPI set debug"); 3497 if (layer != NULL) { 3498 if (strcmp("NONE", layer) != 0) 3499 kprintf(" layer '%s'", layer); 3500 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer); 3501 kfreeenv(layer); 3502 } 3503 if (level != NULL) { 3504 if (strcmp("NONE", level) != 0) 3505 kprintf(" level '%s'", level); 3506 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel); 3507 kfreeenv(level); 3508 } 3509 kprintf("\n"); 3510 } 3511 3512 SYSINIT(acpi_debugging, SI_BOOT1_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 3513 NULL); 3514 3515 static int 3516 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 3517 { 3518 int error, *dbg; 3519 struct debugtag *tag; 3520 struct sbuf sb; 3521 3522 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 3523 return (ENOMEM); 3524 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 3525 tag = &dbg_layer[0]; 3526 dbg = &AcpiDbgLayer; 3527 } else { 3528 tag = &dbg_level[0]; 3529 dbg = &AcpiDbgLevel; 3530 } 3531 3532 /* Get old values if this is a get request. */ 3533 ACPI_SERIAL_BEGIN(acpi); 3534 if (*dbg == 0) { 3535 sbuf_cpy(&sb, "NONE"); 3536 } else if (req->newptr == NULL) { 3537 for (; tag->name != NULL; tag++) { 3538 if ((*dbg & tag->value) == tag->value) 3539 sbuf_printf(&sb, "%s ", tag->name); 3540 } 3541 } 3542 sbuf_trim(&sb); 3543 sbuf_finish(&sb); 3544 3545 /* Copy out the old values to the user. */ 3546 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb)); 3547 sbuf_delete(&sb); 3548 3549 /* If the user is setting a string, parse it. */ 3550 if (error == 0 && req->newptr != NULL) { 3551 *dbg = 0; 3552 ksetenv((char *)oidp->oid_arg1, (char *)req->newptr); 3553 acpi_set_debugging(NULL); 3554 } 3555 ACPI_SERIAL_END(acpi); 3556 3557 return (error); 3558 } 3559 3560 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 3561 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 3562 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 3563 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 3564 #endif /* ACPI_DEBUG */ 3565 3566 static int 3567 acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS) 3568 { 3569 int error; 3570 int old; 3571 3572 old = acpi_debug_objects; 3573 error = sysctl_handle_int(oidp, &acpi_debug_objects, 0, req); 3574 if (error != 0 || req->newptr == NULL) 3575 return (error); 3576 if (old == acpi_debug_objects || (old && acpi_debug_objects)) 3577 return (0); 3578 3579 ACPI_SERIAL_BEGIN(acpi); 3580 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE; 3581 ACPI_SERIAL_END(acpi); 3582 3583 return (0); 3584 } 3585 3586 3587 static int 3588 acpi_parse_interfaces(char *str, struct acpi_interface *iface) 3589 { 3590 char *p; 3591 size_t len; 3592 int i, j; 3593 3594 p = str; 3595 while (isspace(*p) || *p == ',') 3596 p++; 3597 len = strlen(p); 3598 if (len == 0) 3599 return (0); 3600 p = kstrdup(p, M_TEMP); 3601 for (i = 0; i < len; i++) 3602 if (p[i] == ',') 3603 p[i] = '\0'; 3604 i = j = 0; 3605 while (i < len) 3606 if (isspace(p[i]) || p[i] == '\0') 3607 i++; 3608 else { 3609 i += strlen(p + i) + 1; 3610 j++; 3611 } 3612 if (j == 0) { 3613 kfree(p, M_TEMP); 3614 return (0); 3615 } 3616 iface->data = kmalloc(sizeof(*iface->data) * j, M_TEMP, M_WAITOK); 3617 iface->num = j; 3618 i = j = 0; 3619 while (i < len) 3620 if (isspace(p[i]) || p[i] == '\0') 3621 i++; 3622 else { 3623 iface->data[j] = p + i; 3624 i += strlen(p + i) + 1; 3625 j++; 3626 } 3627 3628 return (j); 3629 } 3630 3631 static void 3632 acpi_free_interfaces(struct acpi_interface *iface) 3633 { 3634 kfree(iface->data[0], M_TEMP); 3635 kfree(iface->data, M_TEMP); 3636 } 3637 3638 static void 3639 acpi_reset_interfaces(device_t dev) 3640 { 3641 struct acpi_interface list; 3642 ACPI_STATUS status; 3643 int i; 3644 3645 if (acpi_parse_interfaces(acpi_install_interface, &list) > 0) { 3646 for (i = 0; i < list.num; i++) { 3647 status = AcpiInstallInterface(list.data[i]); 3648 if (ACPI_FAILURE(status)) 3649 device_printf(dev, 3650 "failed to install _OSI(\"%s\"): %s\n", 3651 list.data[i], AcpiFormatException(status)); 3652 else if (bootverbose) 3653 device_printf(dev, "installed _OSI(\"%s\")\n", 3654 list.data[i]); 3655 } 3656 acpi_free_interfaces(&list); 3657 } 3658 if (acpi_parse_interfaces(acpi_remove_interface, &list) > 0) { 3659 for (i = 0; i < list.num; i++) { 3660 status = AcpiRemoveInterface(list.data[i]); 3661 if (ACPI_FAILURE(status)) 3662 device_printf(dev, 3663 "failed to remove _OSI(\"%s\"): %s\n", 3664 list.data[i], AcpiFormatException(status)); 3665 else if (bootverbose) 3666 device_printf(dev, "removed _OSI(\"%s\")\n", 3667 list.data[i]); 3668 } 3669 acpi_free_interfaces(&list); 3670 } 3671 } 3672 3673 static int 3674 acpi_pm_func(u_long cmd, void *arg, ...) 3675 { 3676 int state, acpi_state; 3677 int error; 3678 struct acpi_softc *sc; 3679 __va_list ap; 3680 3681 error = 0; 3682 switch (cmd) { 3683 case POWER_CMD_SUSPEND: 3684 sc = (struct acpi_softc *)arg; 3685 if (sc == NULL) { 3686 error = EINVAL; 3687 goto out; 3688 } 3689 3690 __va_start(ap, arg); 3691 state = __va_arg(ap, int); 3692 __va_end(ap); 3693 3694 switch (state) { 3695 case POWER_SLEEP_STATE_STANDBY: 3696 acpi_state = sc->acpi_standby_sx; 3697 break; 3698 case POWER_SLEEP_STATE_SUSPEND: 3699 acpi_state = sc->acpi_suspend_sx; 3700 break; 3701 case POWER_SLEEP_STATE_HIBERNATE: 3702 acpi_state = ACPI_STATE_S4; 3703 break; 3704 default: 3705 error = EINVAL; 3706 goto out; 3707 } 3708 3709 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state))) 3710 error = ENXIO; 3711 break; 3712 default: 3713 error = EINVAL; 3714 goto out; 3715 } 3716 3717 out: 3718 return (error); 3719 } 3720 3721 static void 3722 acpi_pm_register(void *arg) 3723 { 3724 if (!cold || resource_disabled("acpi", 0)) 3725 return; 3726 3727 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 3728 } 3729 3730 SYSINIT(power, SI_BOOT2_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 3731