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