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 51 #include <sys/rman.h> 52 #include <bus/isa/isavar.h> 53 #include <bus/isa/pnpvar.h> 54 55 #include "acpi.h" 56 #include <dev/acpica/acpivar.h> 57 #include <dev/acpica/acpiio.h> 58 #include "achware.h" 59 #include "acnamesp.h" 60 #include "acglobal.h" 61 62 #include "pci_if.h" 63 #include <bus/pci/pci_cfgreg.h> 64 #include <bus/pci/pcivar.h> 65 #include <bus/pci/pci_private.h> 66 67 #include <vm/vm_param.h> 68 69 MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 70 71 /* Hooks for the ACPI CA debugging infrastructure */ 72 #define _COMPONENT ACPI_BUS 73 ACPI_MODULE_NAME("ACPI") 74 75 static d_open_t acpiopen; 76 static d_close_t acpiclose; 77 static d_ioctl_t acpiioctl; 78 79 static struct dev_ops acpi_ops = { 80 { "acpi", 0, 0 }, 81 .d_open = acpiopen, 82 .d_close = acpiclose, 83 .d_ioctl = acpiioctl 84 }; 85 86 /* Global mutex for locking access to the ACPI subsystem. */ 87 struct lock acpi_lock; 88 89 /* Bitmap of device quirks. */ 90 int acpi_quirks; 91 92 static int acpi_modevent(struct module *mod, int event, void *junk); 93 static void acpi_identify(driver_t *driver, device_t parent); 94 static int acpi_probe(device_t dev); 95 static int acpi_attach(device_t dev); 96 static int acpi_suspend(device_t dev); 97 static int acpi_resume(device_t dev); 98 static int acpi_shutdown(device_t dev); 99 static device_t acpi_add_child(device_t bus, device_t parent, int order, const char *name, 100 int unit); 101 static int acpi_print_child(device_t bus, device_t child); 102 static void acpi_probe_nomatch(device_t bus, device_t child); 103 static void acpi_driver_added(device_t dev, driver_t *driver); 104 static int acpi_read_ivar(device_t dev, device_t child, int index, 105 uintptr_t *result); 106 static int acpi_write_ivar(device_t dev, device_t child, int index, 107 uintptr_t value); 108 static struct resource_list *acpi_get_rlist(device_t dev, device_t child); 109 static int acpi_sysres_alloc(device_t dev); 110 static struct resource *acpi_alloc_resource(device_t bus, device_t child, 111 int type, int *rid, u_long start, u_long end, 112 u_long count, u_int flags, int cpuid); 113 static int acpi_release_resource(device_t bus, device_t child, int type, 114 int rid, struct resource *r); 115 static void acpi_delete_resource(device_t bus, device_t child, int type, 116 int rid); 117 static uint32_t acpi_isa_get_logicalid(device_t dev); 118 static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count); 119 static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids); 120 static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev, 121 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters, 122 ACPI_BUFFER *ret); 123 static int acpi_device_pwr_for_sleep(device_t bus, device_t dev, 124 int *dstate); 125 static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, 126 void *context, void **retval); 127 static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev, 128 int max_depth, acpi_scan_cb_t user_fn, void *arg); 129 static int acpi_set_powerstate_method(device_t bus, device_t child, 130 int state); 131 static int acpi_isa_pnp_probe(device_t bus, device_t child, 132 struct isa_pnp_id *ids); 133 static void acpi_probe_children(device_t bus); 134 static void acpi_probe_order(ACPI_HANDLE handle, int *order); 135 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, 136 void *context, void **status); 137 static ACPI_STATUS acpi_EnterSleepState(struct acpi_softc *sc, int state); 138 static void acpi_shutdown_final(void *arg, int howto); 139 static void acpi_enable_fixed_events(struct acpi_softc *sc); 140 static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate); 141 static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate); 142 static int acpi_wake_prep_walk(int sstate); 143 static int acpi_wake_sysctl_walk(device_t dev); 144 #ifdef notyet 145 static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS); 146 #endif 147 static void acpi_system_eventhandler_sleep(void *arg, int state); 148 static void acpi_system_eventhandler_wakeup(void *arg, int state); 149 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 150 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 151 static int acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS); 152 static int acpi_pm_func(u_long cmd, void *arg, ...); 153 static int acpi_child_location_str_method(device_t acdev, device_t child, 154 char *buf, size_t buflen); 155 static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child, 156 char *buf, size_t buflen); 157 static void acpi_enable_pcie(void); 158 159 static device_method_t acpi_methods[] = { 160 /* Device interface */ 161 DEVMETHOD(device_identify, acpi_identify), 162 DEVMETHOD(device_probe, acpi_probe), 163 DEVMETHOD(device_attach, acpi_attach), 164 DEVMETHOD(device_shutdown, acpi_shutdown), 165 DEVMETHOD(device_detach, bus_generic_detach), 166 DEVMETHOD(device_suspend, acpi_suspend), 167 DEVMETHOD(device_resume, acpi_resume), 168 169 /* Bus interface */ 170 DEVMETHOD(bus_add_child, acpi_add_child), 171 DEVMETHOD(bus_print_child, acpi_print_child), 172 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch), 173 DEVMETHOD(bus_driver_added, acpi_driver_added), 174 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 175 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 176 DEVMETHOD(bus_get_resource_list, acpi_get_rlist), 177 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 178 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 179 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 180 DEVMETHOD(bus_release_resource, acpi_release_resource), 181 DEVMETHOD(bus_delete_resource, acpi_delete_resource), 182 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method), 183 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method), 184 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 185 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 186 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 187 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 188 189 /* ACPI bus */ 190 DEVMETHOD(acpi_id_probe, acpi_device_id_probe), 191 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj), 192 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep), 193 DEVMETHOD(acpi_scan_children, acpi_device_scan_children), 194 195 /* PCI emulation */ 196 DEVMETHOD(pci_set_powerstate, acpi_set_powerstate_method), 197 198 /* ISA emulation */ 199 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 200 201 DEVMETHOD_END 202 }; 203 204 static driver_t acpi_driver = { 205 "acpi", 206 acpi_methods, 207 sizeof(struct acpi_softc), 208 }; 209 210 static devclass_t acpi_devclass; 211 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, NULL); 212 MODULE_VERSION(acpi, 1); 213 214 ACPI_SERIAL_DECL(acpi, "ACPI serializer") 215 216 /* Local pools for managing system resources for ACPI child devices. */ 217 static struct rman acpi_rman_io, acpi_rman_mem; 218 219 #define ACPI_MINIMUM_AWAKETIME 5 220 221 static const char* sleep_state_names[] = { 222 "S0", "S1", "S2", "S3", "S4", "S5", "NONE"}; 223 224 SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging"); 225 static char acpi_ca_version[12]; 226 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, 227 acpi_ca_version, 0, "Version of Intel ACPICA"); 228 229 /* 230 * Use this tunable to disable the control method auto-serialization 231 * mechanism that was added in 20140214 and superseded the previous 232 * AcpiGbl_SerializeAllMethods global. 233 */ 234 static int acpi_auto_serialize_methods = 1; 235 TUNABLE_INT("hw.acpi.auto_serialize_methods", &acpi_auto_serialize_methods); 236 237 /* Allow users to dump Debug objects without ACPI debugger. */ 238 static int acpi_debug_objects; 239 TUNABLE_INT("debug.acpi.enable_debug_objects", &acpi_debug_objects); 240 SYSCTL_PROC(_debug_acpi, OID_AUTO, enable_debug_objects, 241 CTLFLAG_RW | CTLTYPE_INT, NULL, 0, acpi_debug_objects_sysctl, "I", 242 "Enable Debug objects"); 243 244 /* Allow the interpreter to ignore common mistakes in BIOS. */ 245 static int acpi_interpreter_slack = 1; 246 TUNABLE_INT("debug.acpi.interpreter_slack", &acpi_interpreter_slack); 247 SYSCTL_INT(_debug_acpi, OID_AUTO, interpreter_slack, CTLFLAG_RD, 248 &acpi_interpreter_slack, 1, "Turn on interpreter slack mode."); 249 250 /* Power devices off and on in suspend and resume. XXX Remove once tested. */ 251 static int acpi_do_powerstate = 1; 252 TUNABLE_INT("debug.acpi.do_powerstate", &acpi_do_powerstate); 253 SYSCTL_INT(_debug_acpi, OID_AUTO, do_powerstate, CTLFLAG_RW, 254 &acpi_do_powerstate, 1, "Turn off devices when suspending."); 255 256 /* Allow users to override quirks. */ 257 TUNABLE_INT("debug.acpi.quirks", &acpi_quirks); 258 259 static int acpi_susp_bounce; 260 SYSCTL_INT(_debug_acpi, OID_AUTO, suspend_bounce, CTLFLAG_RW, 261 &acpi_susp_bounce, 0, "Don't actually suspend, just test devices."); 262 263 /* 264 * ACPI can only be loaded as a module by the loader; activating it after 265 * system bootstrap time is not useful, and can be fatal to the system. 266 * It also cannot be unloaded, since the entire system bus heirarchy hangs 267 * off it. 268 */ 269 static int 270 acpi_modevent(struct module *mod, int event, void *junk) 271 { 272 switch (event) { 273 case MOD_LOAD: 274 if (!cold) { 275 kprintf("The ACPI driver cannot be loaded after boot.\n"); 276 return (EPERM); 277 } 278 break; 279 case MOD_UNLOAD: 280 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 281 return (EBUSY); 282 break; 283 default: 284 break; 285 } 286 return (0); 287 } 288 289 /* 290 * Perform early initialization. 291 */ 292 ACPI_STATUS 293 acpi_Startup(void) 294 { 295 static int started = 0; 296 ACPI_STATUS status; 297 int val; 298 299 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 300 301 /* Only run the startup code once. The MADT driver also calls this. */ 302 if (started) 303 return_VALUE (AE_OK); 304 started = 1; 305 306 /* 307 * Pre-allocate space for RSDT/XSDT and DSDT tables and allow resizing 308 * if more tables exist. 309 */ 310 if (ACPI_FAILURE(status = AcpiInitializeTables(NULL, 2, TRUE))) { 311 kprintf("ACPI: Table initialisation failed: %s\n", 312 AcpiFormatException(status)); 313 return_VALUE (status); 314 } 315 316 /* Set up any quirks we have for this system. */ 317 if (acpi_quirks == ACPI_Q_OK) 318 acpi_table_quirks(&acpi_quirks); 319 320 /* If the user manually set the disabled hint to 0, force-enable ACPI. */ 321 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0) 322 acpi_quirks &= ~ACPI_Q_BROKEN; 323 if (acpi_quirks & ACPI_Q_BROKEN) { 324 kprintf("ACPI disabled by blacklist. Contact your BIOS vendor.\n"); 325 status = AE_SUPPORT; 326 } 327 328 return_VALUE (status); 329 } 330 331 /* 332 * Detect ACPI, perform early initialisation 333 */ 334 static void 335 acpi_identify(driver_t *driver, device_t parent) 336 { 337 device_t child; 338 339 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 340 341 if (!cold) 342 return_VOID; 343 344 /* Check that we haven't been disabled with a hint. */ 345 if (resource_disabled("acpi", 0)) 346 return_VOID; 347 348 /* Make sure we're not being doubly invoked. */ 349 if (device_find_child(parent, "acpi", 0) != NULL) 350 return_VOID; 351 352 ksnprintf(acpi_ca_version, sizeof(acpi_ca_version), "%x", ACPI_CA_VERSION); 353 354 /* Initialize root tables. */ 355 if (ACPI_FAILURE(acpi_Startup())) { 356 kprintf("ACPI: Try disabling either ACPI or apic support.\n"); 357 return_VOID; 358 } 359 360 /* Attach the actual ACPI device. */ 361 if ((child = BUS_ADD_CHILD(parent, parent, 10, "acpi", 0)) == NULL) { 362 device_printf(parent, "device_identify failed\n"); 363 return_VOID; 364 } 365 } 366 367 /* 368 * Fetch some descriptive data from ACPI to put in our attach message. 369 */ 370 static int 371 acpi_probe(device_t dev) 372 { 373 ACPI_TABLE_RSDP *rsdp; 374 ACPI_TABLE_HEADER *rsdt; 375 ACPI_PHYSICAL_ADDRESS paddr; 376 char buf[ACPI_OEM_ID_SIZE + ACPI_OEM_TABLE_ID_SIZE + 2]; 377 struct sbuf sb; 378 379 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 380 381 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 382 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 383 device_printf(dev, "probe failed, other PM system enabled.\n"); 384 return_VALUE (ENXIO); 385 } 386 387 if ((paddr = AcpiOsGetRootPointer()) == 0 || 388 (rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP))) == NULL) 389 return_VALUE (ENXIO); 390 if (rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress != 0) 391 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress; 392 else 393 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress; 394 AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP)); 395 396 if ((rsdt = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER))) == NULL) 397 return_VALUE (ENXIO); 398 sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN); 399 sbuf_bcat(&sb, rsdt->OemId, ACPI_OEM_ID_SIZE); 400 sbuf_trim(&sb); 401 sbuf_putc(&sb, ' '); 402 sbuf_bcat(&sb, rsdt->OemTableId, ACPI_OEM_TABLE_ID_SIZE); 403 sbuf_trim(&sb); 404 sbuf_finish(&sb); 405 device_set_desc_copy(dev, sbuf_data(&sb)); 406 sbuf_delete(&sb); 407 AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER)); 408 409 return_VALUE (0); 410 } 411 412 static int 413 acpi_attach(device_t dev) 414 { 415 struct acpi_softc *sc; 416 ACPI_STATUS status; 417 int error, state; 418 UINT32 flags; 419 UINT8 TypeA, TypeB; 420 char *env; 421 422 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 423 424 sc = device_get_softc(dev); 425 sc->acpi_dev = dev; 426 callout_init(&sc->susp_force_to); 427 428 if ((error = acpi_task_thread_init())) { 429 device_printf(dev, "Could not start task thread.\n"); 430 goto out; 431 } 432 433 error = ENXIO; 434 435 /* Initialize resource manager. */ 436 acpi_rman_io.rm_type = RMAN_ARRAY; 437 acpi_rman_io.rm_start = 0; 438 acpi_rman_io.rm_end = 0xffff; 439 acpi_rman_io.rm_descr = "ACPI I/O ports"; 440 if (rman_init(&acpi_rman_io, -1) != 0) 441 panic("acpi rman_init IO ports failed"); 442 acpi_rman_mem.rm_type = RMAN_ARRAY; 443 acpi_rman_mem.rm_start = 0; 444 acpi_rman_mem.rm_end = ~0ul; 445 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses"; 446 if (rman_init(&acpi_rman_mem, -1) != 0) 447 panic("acpi rman_init memory failed"); 448 449 /* Initialise the ACPI mutex */ 450 ACPI_LOCK_INIT(acpi, "acpi"); 451 ACPI_SERIAL_INIT(acpi); 452 453 /* 454 * Set the globals from our tunables. This is needed because ACPI-CA 455 * uses UINT8 for some values and we have no tunable_byte. 456 */ 457 AcpiGbl_AutoSerializeMethods = acpi_auto_serialize_methods ? TRUE : FALSE; 458 AcpiGbl_EnableInterpreterSlack = acpi_interpreter_slack ? TRUE : FALSE; 459 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE; 460 461 #ifndef ACPI_DEBUG 462 /* 463 * Disable Debug Object output. 464 */ 465 AcpiDbgLevel &= ~ACPI_LV_DEBUG_OBJECT; 466 #endif 467 468 /* Start up the ACPI CA subsystem. */ 469 status = AcpiInitializeSubsystem(); 470 if (ACPI_FAILURE(status)) { 471 device_printf(dev, "Could not initialize Subsystem: %s\n", 472 AcpiFormatException(status)); 473 goto out; 474 } 475 476 /* Load ACPI name space. */ 477 status = AcpiLoadTables(); 478 if (ACPI_FAILURE(status)) { 479 device_printf(dev, "Could not load Namespace: %s\n", 480 AcpiFormatException(status)); 481 goto out; 482 } 483 484 /* Handle MCFG table if present. */ 485 acpi_enable_pcie(); 486 487 /* Install the default address space handlers. */ 488 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 489 ACPI_ADR_SPACE_SYSTEM_MEMORY, ACPI_DEFAULT_HANDLER, NULL, NULL); 490 if (ACPI_FAILURE(status)) { 491 device_printf(dev, "Could not initialise SystemMemory handler: %s\n", 492 AcpiFormatException(status)); 493 goto out; 494 } 495 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 496 ACPI_ADR_SPACE_SYSTEM_IO, ACPI_DEFAULT_HANDLER, NULL, NULL); 497 if (ACPI_FAILURE(status)) { 498 device_printf(dev, "Could not initialise SystemIO handler: %s\n", 499 AcpiFormatException(status)); 500 goto out; 501 } 502 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 503 ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL); 504 if (ACPI_FAILURE(status)) { 505 device_printf(dev, "could not initialise PciConfig handler: %s\n", 506 AcpiFormatException(status)); 507 goto out; 508 } 509 510 /* 511 * Note that some systems (specifically, those with namespace evaluation 512 * issues that require the avoidance of parts of the namespace) must 513 * avoid running _INI and _STA on everything, as well as dodging the final 514 * object init pass. 515 * 516 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 517 * 518 * XXX We should arrange for the object init pass after we have attached 519 * all our child devices, but on many systems it works here. 520 */ 521 flags = 0; 522 if (ktestenv("debug.acpi.avoid")) 523 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 524 525 /* Bring the hardware and basic handlers online. */ 526 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 527 device_printf(dev, "Could not enable ACPI: %s\n", 528 AcpiFormatException(status)); 529 goto out; 530 } 531 532 /* 533 * Fix up the interrupt timer after enabling ACPI, so that the 534 * interrupt cputimer that choked by ACPI power management could 535 * be resurrected before probing various devices. 536 */ 537 DELAY(5000); 538 cputimer_intr_pmfixup(); 539 540 /* 541 * Call the ECDT probe function to provide EC functionality before 542 * the namespace has been evaluated. 543 * 544 * XXX This happens before the sysresource devices have been probed and 545 * attached so its resources come from nexus0. In practice, this isn't 546 * a problem but should be addressed eventually. 547 */ 548 acpi_ec_ecdt_probe(dev); 549 550 /* Bring device objects and regions online. */ 551 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 552 device_printf(dev, "Could not initialize ACPI objects: %s\n", 553 AcpiFormatException(status)); 554 goto out; 555 } 556 557 /* 558 * Setup our sysctl tree. 559 * 560 * XXX: This doesn't check to make sure that none of these fail. 561 */ 562 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 563 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 564 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 565 device_get_name(dev), CTLFLAG_RD, 0, ""); 566 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 567 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 568 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 569 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 570 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 571 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 572 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 573 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 574 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 575 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 576 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 577 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 578 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 579 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 580 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 581 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 582 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 583 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 584 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 585 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0, 586 "sleep delay"); 587 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 588 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode"); 589 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 590 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode"); 591 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 592 OID_AUTO, "disable_on_reboot", CTLFLAG_RW, 593 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system"); 594 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 595 OID_AUTO, "handle_reboot", CTLFLAG_RW, 596 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot"); 597 598 /* 599 * Default to 1 second before sleeping to give some machines time to 600 * stabilize. 601 */ 602 sc->acpi_sleep_delay = 1; 603 if (bootverbose) 604 sc->acpi_verbose = 1; 605 if ((env = kgetenv("hw.acpi.verbose")) != NULL) { 606 if (strcmp(env, "0") != 0) 607 sc->acpi_verbose = 1; 608 kfreeenv(env); 609 } 610 611 /* Only enable reboot by default if the FADT says it is available. */ 612 if (AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) 613 sc->acpi_handle_reboot = 1; 614 615 /* Only enable S4BIOS by default if the FACS says it is available. */ 616 if (AcpiGbl_FACS->Flags & ACPI_FACS_S4_BIOS_PRESENT) 617 sc->acpi_s4bios = 1; 618 619 /* 620 * Dispatch the default sleep state to devices. The lid switch is set 621 * to NONE by default to avoid surprising users. 622 */ 623 sc->acpi_power_button_sx = ACPI_STATE_S5; 624 sc->acpi_lid_switch_sx = ACPI_S_STATES_MAX + 1; 625 sc->acpi_standby_sx = ACPI_STATE_S1; 626 sc->acpi_suspend_sx = ACPI_STATE_S3; 627 628 /* Pick the first valid sleep state for the sleep button default. */ 629 sc->acpi_sleep_button_sx = ACPI_S_STATES_MAX + 1; 630 for (state = ACPI_STATE_S1; state <= ACPI_STATE_S4; state++) 631 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) { 632 sc->acpi_sleep_button_sx = state; 633 break; 634 } 635 636 acpi_enable_fixed_events(sc); 637 638 /* 639 * Scan the namespace and attach/initialise children. 640 */ 641 642 /* Register our shutdown handler. */ 643 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 644 SHUTDOWN_PRI_LAST); 645 646 /* 647 * Register our acpi event handlers. 648 * XXX should be configurable eg. via userland policy manager. 649 */ 650 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 651 sc, ACPI_EVENT_PRI_LAST); 652 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 653 sc, ACPI_EVENT_PRI_LAST); 654 655 /* Flag our initial states. */ 656 sc->acpi_enabled = 1; 657 sc->acpi_sstate = ACPI_STATE_S0; 658 sc->acpi_sleep_disabled = 0; 659 /* Create the control device */ 660 sc->acpi_dev_t = make_dev(&acpi_ops, 0, UID_ROOT, GID_WHEEL, 0644, 661 "acpi"); 662 sc->acpi_dev_t->si_drv1 = sc; 663 664 if ((error = acpi_machdep_init(dev))) 665 goto out; 666 667 /* Register ACPI again to pass the correct argument of pm_func. */ 668 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 669 670 if (!acpi_disabled("bus")) 671 acpi_probe_children(dev); 672 673 /* Update all GPEs and enable runtime GPEs. */ 674 status = AcpiUpdateAllGpes(); 675 if (ACPI_FAILURE(status)) { 676 device_printf(dev, "Could not update all GPEs: %s\n", 677 AcpiFormatException(status)); 678 } 679 680 /* Allow sleep request after a while. */ 681 /* timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); */ 682 683 error = 0; 684 685 out: 686 cputimer_intr_pmfixup(); 687 acpi_task_thread_schedule(); 688 return_VALUE (error); 689 } 690 691 static int 692 acpi_suspend(device_t dev) 693 { 694 device_t child, *devlist; 695 int error, i, numdevs, pstate; 696 697 /* First give child devices a chance to suspend. */ 698 error = bus_generic_suspend(dev); 699 if (error) 700 return (error); 701 702 /* 703 * Now, set them into the appropriate power state, usually D3. If the 704 * device has an _SxD method for the next sleep state, use that power 705 * state instead. 706 */ 707 device_get_children(dev, &devlist, &numdevs); 708 for (i = 0; i < numdevs; i++) { 709 /* If the device is not attached, we've powered it down elsewhere. */ 710 child = devlist[i]; 711 if (!device_is_attached(child)) 712 continue; 713 714 /* 715 * Default to D3 for all sleep states. The _SxD method is optional 716 * so set the powerstate even if it's absent. 717 */ 718 pstate = PCI_POWERSTATE_D3; 719 error = acpi_device_pwr_for_sleep(device_get_parent(child), 720 child, &pstate); 721 if ((error == 0 || error == ESRCH) && acpi_do_powerstate) 722 pci_set_powerstate(child, pstate); 723 } 724 kfree(devlist, M_TEMP); 725 error = 0; 726 727 return (error); 728 } 729 730 static int 731 acpi_resume(device_t dev) 732 { 733 ACPI_HANDLE handle; 734 int i, numdevs; 735 device_t child, *devlist; 736 737 /* 738 * Put all devices in D0 before resuming them. Call _S0D on each one 739 * since some systems expect this. 740 */ 741 device_get_children(dev, &devlist, &numdevs); 742 for (i = 0; i < numdevs; i++) { 743 child = devlist[i]; 744 handle = acpi_get_handle(child); 745 if (handle) 746 AcpiEvaluateObject(handle, "_S0D", NULL, NULL); 747 if (device_is_attached(child) && acpi_do_powerstate) 748 pci_set_powerstate(child, PCI_POWERSTATE_D0); 749 } 750 kfree(devlist, M_TEMP); 751 752 return (bus_generic_resume(dev)); 753 } 754 755 static int 756 acpi_shutdown(device_t dev) 757 { 758 /* Allow children to shutdown first. */ 759 bus_generic_shutdown(dev); 760 761 /* 762 * Enable any GPEs that are able to power-on the system (i.e., RTC). 763 * Also, disable any that are not valid for this state (most). 764 */ 765 acpi_wake_prep_walk(ACPI_STATE_S5); 766 767 return (0); 768 } 769 770 /* 771 * Handle a new device being added 772 */ 773 static device_t 774 acpi_add_child(device_t bus, device_t parent, int order, const char *name, int unit) 775 { 776 struct acpi_device *ad; 777 device_t child; 778 779 if ((ad = kmalloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 780 return (NULL); 781 782 resource_list_init(&ad->ad_rl); 783 child = device_add_child_ordered(parent, order, name, unit); 784 if (child != NULL) 785 device_set_ivars(child, ad); 786 else 787 kfree(ad, M_ACPIDEV); 788 return (child); 789 } 790 791 static int 792 acpi_print_child(device_t bus, device_t child) 793 { 794 struct acpi_device *adev = device_get_ivars(child); 795 struct resource_list *rl = &adev->ad_rl; 796 int retval = 0; 797 798 retval += bus_print_child_header(bus, child); 799 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 800 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 801 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 802 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 803 if (device_get_flags(child)) 804 retval += kprintf(" flags %#x", device_get_flags(child)); 805 retval += bus_print_child_footer(bus, child); 806 807 return (retval); 808 } 809 810 /* 811 * If this device is an ACPI child but no one claimed it, attempt 812 * to power it off. We'll power it back up when a driver is added. 813 * 814 * XXX Disabled for now since many necessary devices (like fdc and 815 * ATA) don't claim the devices we created for them but still expect 816 * them to be powered up. 817 */ 818 static void 819 acpi_probe_nomatch(device_t bus, device_t child) 820 { 821 822 /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */ 823 } 824 825 /* 826 * If a new driver has a chance to probe a child, first power it up. 827 * 828 * XXX Disabled for now (see acpi_probe_nomatch for details). 829 */ 830 static void 831 acpi_driver_added(device_t dev, driver_t *driver) 832 { 833 device_t child, *devlist; 834 int i, numdevs; 835 836 DEVICE_IDENTIFY(driver, dev); 837 device_get_children(dev, &devlist, &numdevs); 838 for (i = 0; i < numdevs; i++) { 839 child = devlist[i]; 840 if (device_get_state(child) == DS_NOTPRESENT) { 841 /* pci_set_powerstate(child, PCI_POWERSTATE_D0); */ 842 if (device_probe_and_attach(child) != 0) 843 ; /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */ 844 } 845 } 846 kfree(devlist, M_TEMP); 847 } 848 849 /* Location hint for devctl(8) */ 850 static int 851 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf, 852 size_t buflen) 853 { 854 struct acpi_device *dinfo = device_get_ivars(child); 855 856 if (dinfo->ad_handle) 857 ksnprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle)); 858 else 859 ksnprintf(buf, buflen, "unknown"); 860 return (0); 861 } 862 863 /* PnP information for devctl(8) */ 864 static int 865 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 866 size_t buflen) 867 { 868 ACPI_DEVICE_INFO *adinfo; 869 struct acpi_device *dinfo = device_get_ivars(child); 870 char *end; 871 int error; 872 873 error = AcpiGetObjectInfo(dinfo->ad_handle, &adinfo); 874 if (error) { 875 ksnprintf(buf, buflen, "unknown"); 876 } else { 877 ksnprintf(buf, buflen, "_HID=%s _UID=%lu", 878 (adinfo->Valid & ACPI_VALID_HID) ? 879 adinfo->HardwareId.String : "none", 880 (adinfo->Valid & ACPI_VALID_UID) ? 881 strtoul(adinfo->UniqueId.String, &end, 10) : 0); 882 if (adinfo) 883 AcpiOsFree(adinfo); 884 } 885 return (0); 886 } 887 888 /* 889 * Handle per-device ivars 890 */ 891 static int 892 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 893 { 894 struct acpi_device *ad; 895 896 if ((ad = device_get_ivars(child)) == NULL) { 897 kprintf("device has no ivars\n"); 898 return (ENOENT); 899 } 900 901 /* ACPI and ISA compatibility ivars */ 902 switch(index) { 903 case ACPI_IVAR_HANDLE: 904 *(ACPI_HANDLE *)result = ad->ad_handle; 905 break; 906 case ACPI_IVAR_MAGIC: 907 *result = ad->ad_magic; 908 break; 909 case ACPI_IVAR_PRIVATE: 910 *(void **)result = ad->ad_private; 911 break; 912 case ACPI_IVAR_FLAGS: 913 *(int *)result = ad->ad_flags; 914 break; 915 case ISA_IVAR_VENDORID: 916 case ISA_IVAR_SERIAL: 917 case ISA_IVAR_COMPATID: 918 *(int *)result = -1; 919 break; 920 case ISA_IVAR_LOGICALID: 921 *(int *)result = acpi_isa_get_logicalid(child); 922 break; 923 default: 924 return (ENOENT); 925 } 926 927 return (0); 928 } 929 930 static int 931 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 932 { 933 struct acpi_device *ad; 934 935 if ((ad = device_get_ivars(child)) == NULL) { 936 kprintf("device has no ivars\n"); 937 return (ENOENT); 938 } 939 940 switch(index) { 941 case ACPI_IVAR_HANDLE: 942 ad->ad_handle = (ACPI_HANDLE)value; 943 break; 944 case ACPI_IVAR_MAGIC: 945 ad->ad_magic = value; 946 break; 947 case ACPI_IVAR_PRIVATE: 948 ad->ad_private = (void *)value; 949 break; 950 case ACPI_IVAR_FLAGS: 951 ad->ad_flags = (int)value; 952 break; 953 default: 954 panic("bad ivar write request (%d)", index); 955 return (ENOENT); 956 } 957 958 return (0); 959 } 960 961 /* 962 * Handle child resource allocation/removal 963 */ 964 static struct resource_list * 965 acpi_get_rlist(device_t dev, device_t child) 966 { 967 struct acpi_device *ad; 968 969 ad = device_get_ivars(child); 970 return (&ad->ad_rl); 971 } 972 973 /* 974 * Pre-allocate/manage all memory and IO resources. Since rman can't handle 975 * duplicates, we merge any in the sysresource attach routine. 976 */ 977 static int 978 acpi_sysres_alloc(device_t dev) 979 { 980 struct resource *res; 981 struct resource_list *rl; 982 struct resource_list_entry *rle; 983 struct rman *rm; 984 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 985 device_t *children; 986 int child_count, i; 987 /* 988 * Probe/attach any sysresource devices. This would be unnecessary if we 989 * had multi-pass probe/attach. 990 */ 991 if (device_get_children(dev, &children, &child_count) != 0) 992 return (ENXIO); 993 for (i = 0; i < child_count; i++) { 994 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 995 device_probe_and_attach(children[i]); 996 } 997 kfree(children, M_TEMP); 998 999 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev); 1000 if(!rl) 1001 return 0; 1002 SLIST_FOREACH(rle, rl, link) { 1003 if (rle->res != NULL) { 1004 device_printf(dev, "duplicate resource for %lx\n", rle->start); 1005 continue; 1006 } 1007 1008 /* Only memory and IO resources are valid here. */ 1009 switch (rle->type) { 1010 case SYS_RES_IOPORT: 1011 rm = &acpi_rman_io; 1012 break; 1013 case SYS_RES_MEMORY: 1014 rm = &acpi_rman_mem; 1015 break; 1016 default: 1017 continue; 1018 } 1019 1020 /* Pre-allocate resource and add to our rman pool. */ 1021 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type, 1022 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 1023 0, -1); 1024 if (res != NULL) { 1025 rman_manage_region(rm, rman_get_start(res), rman_get_end(res)); 1026 rle->res = res; 1027 } else 1028 device_printf(dev, "reservation of %lx, %lx (%d) failed\n", 1029 rle->start, rle->count, rle->type); 1030 } 1031 return (0); 1032 } 1033 1034 static struct resource * 1035 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 1036 u_long start, u_long end, u_long count, u_int flags, int cpuid) 1037 { 1038 ACPI_RESOURCE ares; 1039 struct acpi_device *ad = device_get_ivars(child); 1040 struct resource_list *rl = &ad->ad_rl; 1041 struct resource_list_entry *rle; 1042 struct resource *res; 1043 struct rman *rm; 1044 1045 res = NULL; 1046 1047 /* We only handle memory and IO resources through rman. */ 1048 switch (type) { 1049 case SYS_RES_IOPORT: 1050 rm = &acpi_rman_io; 1051 break; 1052 case SYS_RES_MEMORY: 1053 rm = &acpi_rman_mem; 1054 break; 1055 default: 1056 rm = NULL; 1057 } 1058 1059 ACPI_SERIAL_BEGIN(acpi); 1060 1061 /* 1062 * If this is an allocation of the "default" range for a given RID, and 1063 * we know what the resources for this device are (i.e., they're on the 1064 * child's resource list), use those start/end values. 1065 */ 1066 if (bus == device_get_parent(child) && start == 0UL && end == ~0UL) { 1067 rle = resource_list_find(rl, type, *rid); 1068 if (rle == NULL) 1069 goto out; 1070 start = rle->start; 1071 end = rle->end; 1072 count = rle->count; 1073 cpuid = rle->cpuid; 1074 } 1075 1076 /* 1077 * If this is an allocation of a specific range, see if we can satisfy 1078 * the request from our system resource regions. If we can't, pass the 1079 * request up to the parent. 1080 */ 1081 if (start + count - 1 == end && rm != NULL) 1082 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE, 1083 child); 1084 if (res == NULL) { 1085 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid, 1086 start, end, count, flags, cpuid); 1087 } else { 1088 rman_set_rid(res, *rid); 1089 1090 /* If requested, activate the resource using the parent's method. */ 1091 if (flags & RF_ACTIVE) 1092 if (bus_activate_resource(child, type, *rid, res) != 0) { 1093 rman_release_resource(res); 1094 res = NULL; 1095 goto out; 1096 } 1097 } 1098 1099 if (res != NULL && device_get_parent(child) == bus) 1100 switch (type) { 1101 case SYS_RES_IRQ: 1102 /* 1103 * Since bus_config_intr() takes immediate effect, we cannot 1104 * configure the interrupt associated with a device when we 1105 * parse the resources but have to defer it until a driver 1106 * actually allocates the interrupt via bus_alloc_resource(). 1107 * 1108 * XXX: Should we handle the lookup failing? 1109 */ 1110 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares))) 1111 acpi_config_intr(child, &ares); 1112 else 1113 kprintf("irq resource not found\n"); 1114 break; 1115 } 1116 1117 out: 1118 ACPI_SERIAL_END(acpi); 1119 return (res); 1120 } 1121 1122 static int 1123 acpi_release_resource(device_t bus, device_t child, int type, int rid, 1124 struct resource *r) 1125 { 1126 struct rman *rm; 1127 int ret; 1128 1129 /* We only handle memory and IO resources through rman. */ 1130 switch (type) { 1131 case SYS_RES_IOPORT: 1132 rm = &acpi_rman_io; 1133 break; 1134 case SYS_RES_MEMORY: 1135 rm = &acpi_rman_mem; 1136 break; 1137 default: 1138 rm = NULL; 1139 } 1140 1141 ACPI_SERIAL_BEGIN(acpi); 1142 1143 /* 1144 * If this resource belongs to one of our internal managers, 1145 * deactivate it and release it to the local pool. If it doesn't, 1146 * pass this request up to the parent. 1147 */ 1148 if (rm != NULL && rman_is_region_manager(r, rm)) { 1149 if (rman_get_flags(r) & RF_ACTIVE) { 1150 ret = bus_deactivate_resource(child, type, rid, r); 1151 if (ret != 0) 1152 goto out; 1153 } 1154 ret = rman_release_resource(r); 1155 } else 1156 ret = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, type, rid, r); 1157 1158 out: 1159 ACPI_SERIAL_END(acpi); 1160 return (ret); 1161 } 1162 1163 static void 1164 acpi_delete_resource(device_t bus, device_t child, int type, int rid) 1165 { 1166 struct resource_list *rl; 1167 1168 rl = acpi_get_rlist(bus, child); 1169 resource_list_delete(rl, type, rid); 1170 } 1171 1172 /* Allocate an IO port or memory resource, given its GAS. */ 1173 int 1174 acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas, 1175 struct resource **res, u_int flags) 1176 { 1177 int error, res_type; 1178 1179 error = ENOMEM; 1180 if (type == NULL || rid == NULL || gas == NULL || res == NULL) 1181 return (EINVAL); 1182 1183 /* We only support memory and IO spaces. */ 1184 switch (gas->SpaceId) { 1185 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1186 res_type = SYS_RES_MEMORY; 1187 break; 1188 case ACPI_ADR_SPACE_SYSTEM_IO: 1189 res_type = SYS_RES_IOPORT; 1190 break; 1191 default: 1192 return (EOPNOTSUPP); 1193 } 1194 1195 /* 1196 * If the register width is less than 8, assume the BIOS author means 1197 * it is a bit field and just allocate a byte. 1198 */ 1199 if (gas->BitWidth && gas->BitWidth < 8) 1200 gas->BitWidth = 8; 1201 1202 /* Validate the address after we're sure we support the space. */ 1203 if (gas->Address == 0 || gas->BitWidth == 0) 1204 return (EINVAL); 1205 1206 bus_set_resource(dev, res_type, *rid, gas->Address, 1207 gas->BitWidth / 8, -1); 1208 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags); 1209 if (*res != NULL) { 1210 *type = res_type; 1211 error = 0; 1212 } else 1213 bus_delete_resource(dev, res_type, *rid); 1214 1215 return (error); 1216 } 1217 1218 /* Probe _HID and _CID for compatible ISA PNP ids. */ 1219 static uint32_t 1220 acpi_isa_get_logicalid(device_t dev) 1221 { 1222 ACPI_DEVICE_INFO *devinfo; 1223 ACPI_HANDLE h; 1224 ACPI_STATUS error; 1225 uint32_t pnpid; 1226 1227 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1228 1229 devinfo = NULL; 1230 pnpid = 0; 1231 1232 /* Fetch and validate the HID. */ 1233 if ((h = acpi_get_handle(dev)) == NULL) 1234 goto out; 1235 error = AcpiGetObjectInfo(h, &devinfo); 1236 if (ACPI_FAILURE(error)) 1237 goto out; 1238 1239 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 1240 pnpid = PNP_EISAID(devinfo->HardwareId.String); 1241 1242 out: 1243 if (devinfo) 1244 AcpiOsFree(devinfo); 1245 return_VALUE (pnpid); 1246 } 1247 1248 static int 1249 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 1250 { 1251 ACPI_DEVICE_INFO *devinfo; 1252 ACPI_HANDLE h; 1253 ACPI_STATUS error; 1254 uint32_t *pnpid; 1255 int valid, i; 1256 1257 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1258 1259 devinfo = NULL; 1260 pnpid = cids; 1261 valid = 0; 1262 1263 /* Fetch and validate the CID */ 1264 if ((h = acpi_get_handle(dev)) == NULL) 1265 goto out; 1266 error = AcpiGetObjectInfo(h, &devinfo); 1267 if (ACPI_FAILURE(error)) 1268 goto out; 1269 if ((devinfo->Valid & ACPI_VALID_CID) == 0) 1270 goto out; 1271 1272 if (devinfo->CompatibleIdList.Count < count) 1273 count = devinfo->CompatibleIdList.Count; 1274 for (i = 0; i < count; i++) { 1275 if (strncmp(devinfo->CompatibleIdList.Ids[i].String, "PNP", 3) != 0) 1276 continue; 1277 *pnpid++ = PNP_EISAID(devinfo->CompatibleIdList.Ids[i].String); 1278 valid++; 1279 } 1280 1281 out: 1282 if (devinfo) 1283 AcpiOsFree(devinfo); 1284 return_VALUE (valid); 1285 } 1286 1287 static char * 1288 acpi_device_id_probe(device_t bus, device_t dev, char **ids) 1289 { 1290 ACPI_HANDLE h; 1291 int i; 1292 1293 h = acpi_get_handle(dev); 1294 if (ids == NULL || h == NULL || acpi_get_type(dev) != ACPI_TYPE_DEVICE) 1295 return (NULL); 1296 1297 /* Try to match one of the array of IDs with a HID or CID. */ 1298 for (i = 0; ids[i] != NULL; i++) { 1299 if (acpi_MatchHid(h, ids[i])) 1300 return (ids[i]); 1301 } 1302 return (NULL); 1303 } 1304 1305 static ACPI_STATUS 1306 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname, 1307 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret) 1308 { 1309 ACPI_HANDLE h; 1310 1311 if (dev == NULL) 1312 h = ACPI_ROOT_OBJECT; 1313 else if ((h = acpi_get_handle(dev)) == NULL) 1314 return (AE_BAD_PARAMETER); 1315 return (AcpiEvaluateObject(h, pathname, parameters, ret)); 1316 } 1317 1318 static int 1319 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate) 1320 { 1321 struct acpi_softc *sc; 1322 ACPI_HANDLE handle; 1323 ACPI_STATUS status; 1324 char sxd[8]; 1325 int error; 1326 1327 sc = device_get_softc(bus); 1328 handle = acpi_get_handle(dev); 1329 1330 /* 1331 * XXX If we find these devices, don't try to power them down. 1332 * The serial and IRDA ports on my T23 hang the system when 1333 * set to D3 and it appears that such legacy devices may 1334 * need special handling in their drivers. 1335 */ 1336 if (handle == NULL || 1337 acpi_MatchHid(handle, "PNP0500") || 1338 acpi_MatchHid(handle, "PNP0501") || 1339 acpi_MatchHid(handle, "PNP0502") || 1340 acpi_MatchHid(handle, "PNP0510") || 1341 acpi_MatchHid(handle, "PNP0511")) 1342 return (ENXIO); 1343 1344 /* 1345 * Override next state with the value from _SxD, if present. If no 1346 * dstate argument was provided, don't fetch the return value. 1347 */ 1348 ksnprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate); 1349 if (dstate) 1350 status = acpi_GetInteger(handle, sxd, dstate); 1351 else 1352 status = AcpiEvaluateObject(handle, sxd, NULL, NULL); 1353 1354 switch (status) { 1355 case AE_OK: 1356 error = 0; 1357 break; 1358 case AE_NOT_FOUND: 1359 error = ESRCH; 1360 break; 1361 default: 1362 error = ENXIO; 1363 break; 1364 } 1365 1366 return (error); 1367 } 1368 1369 /* Callback arg for our implementation of walking the namespace. */ 1370 struct acpi_device_scan_ctx { 1371 acpi_scan_cb_t user_fn; 1372 void *arg; 1373 ACPI_HANDLE parent; 1374 }; 1375 1376 static ACPI_STATUS 1377 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval) 1378 { 1379 struct acpi_device_scan_ctx *ctx; 1380 device_t dev, old_dev; 1381 ACPI_STATUS status; 1382 ACPI_OBJECT_TYPE type; 1383 1384 /* 1385 * Skip this device if we think we'll have trouble with it or it is 1386 * the parent where the scan began. 1387 */ 1388 ctx = (struct acpi_device_scan_ctx *)arg; 1389 if (acpi_avoid(h) || h == ctx->parent) 1390 return (AE_OK); 1391 1392 /* If this is not a valid device type (e.g., a method), skip it. */ 1393 if (ACPI_FAILURE(AcpiGetType(h, &type))) 1394 return (AE_OK); 1395 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR && 1396 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER) 1397 return (AE_OK); 1398 1399 /* 1400 * Call the user function with the current device. If it is unchanged 1401 * afterwards, return. Otherwise, we update the handle to the new dev. 1402 */ 1403 old_dev = acpi_get_device(h); 1404 dev = old_dev; 1405 status = ctx->user_fn(h, &dev, level, ctx->arg); 1406 if (ACPI_FAILURE(status) || old_dev == dev) 1407 return (status); 1408 1409 /* Remove the old child and its connection to the handle. */ 1410 if (old_dev != NULL) { 1411 device_delete_child(device_get_parent(old_dev), old_dev); 1412 AcpiDetachData(h, acpi_fake_objhandler); 1413 } 1414 1415 /* Recreate the handle association if the user created a device. */ 1416 if (dev != NULL) 1417 AcpiAttachData(h, acpi_fake_objhandler, dev); 1418 1419 return (AE_OK); 1420 } 1421 1422 static ACPI_STATUS 1423 acpi_device_scan_children(device_t bus, device_t dev, int max_depth, 1424 acpi_scan_cb_t user_fn, void *arg) 1425 { 1426 ACPI_HANDLE h; 1427 struct acpi_device_scan_ctx ctx; 1428 1429 if (acpi_disabled("children")) 1430 return (AE_OK); 1431 1432 if (dev == NULL) 1433 h = ACPI_ROOT_OBJECT; 1434 else if ((h = acpi_get_handle(dev)) == NULL) 1435 return (AE_BAD_PARAMETER); 1436 ctx.user_fn = user_fn; 1437 ctx.arg = arg; 1438 ctx.parent = h; 1439 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth, 1440 acpi_device_scan_cb, NULL, &ctx, NULL)); 1441 } 1442 1443 /* 1444 * Even though ACPI devices are not PCI, we use the PCI approach for setting 1445 * device power states since it's close enough to ACPI. 1446 */ 1447 static int 1448 acpi_set_powerstate_method(device_t bus, device_t child, int state) 1449 { 1450 ACPI_HANDLE h; 1451 ACPI_STATUS status; 1452 int error; 1453 1454 error = 0; 1455 h = acpi_get_handle(child); 1456 if (state < ACPI_STATE_D0 || state > ACPI_STATE_D3) 1457 return (EINVAL); 1458 if (h == NULL) 1459 return (0); 1460 1461 /* Ignore errors if the power methods aren't present. */ 1462 status = acpi_pwr_switch_consumer(h, state); 1463 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND 1464 && status != AE_BAD_PARAMETER) 1465 device_printf(bus, "failed to set ACPI power state D%d on %s: %s\n", 1466 state, acpi_name(h), AcpiFormatException(status)); 1467 1468 return (error); 1469 } 1470 1471 static int 1472 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 1473 { 1474 int result, cid_count, i; 1475 uint32_t lid, cids[8]; 1476 1477 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1478 1479 /* 1480 * ISA-style drivers attached to ACPI may persist and 1481 * probe manually if we return ENOENT. We never want 1482 * that to happen, so don't ever return it. 1483 */ 1484 result = ENXIO; 1485 1486 /* Scan the supplied IDs for a match */ 1487 lid = acpi_isa_get_logicalid(child); 1488 cid_count = acpi_isa_get_compatid(child, cids, 8); 1489 while (ids && ids->ip_id) { 1490 if (lid == ids->ip_id) { 1491 result = 0; 1492 goto out; 1493 } 1494 for (i = 0; i < cid_count; i++) { 1495 if (cids[i] == ids->ip_id) { 1496 result = 0; 1497 goto out; 1498 } 1499 } 1500 ids++; 1501 } 1502 1503 out: 1504 if (result == 0 && ids->ip_desc) 1505 device_set_desc(child, ids->ip_desc); 1506 1507 return_VALUE (result); 1508 } 1509 1510 /* 1511 * Look for a MCFG table. If it is present, use the settings for 1512 * domain (segment) 0 to setup PCI config space access via the memory 1513 * map. 1514 */ 1515 static void 1516 acpi_enable_pcie(void) 1517 { 1518 ACPI_TABLE_HEADER *hdr; 1519 ACPI_MCFG_ALLOCATION *alloc, *end; 1520 ACPI_STATUS status; 1521 1522 status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr); 1523 if (ACPI_FAILURE(status)) 1524 return; 1525 1526 end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length); 1527 alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1); 1528 while (alloc < end) { 1529 if (alloc->PciSegment == 0) { 1530 pcie_cfgregopen(alloc->Address, alloc->StartBusNumber, 1531 alloc->EndBusNumber); 1532 return; 1533 } 1534 alloc++; 1535 } 1536 } 1537 1538 /* 1539 * Scan all of the ACPI namespace and attach child devices. 1540 * 1541 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and 1542 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec. 1543 * However, in violation of the spec, some systems place their PCI link 1544 * devices in \, so we have to walk the whole namespace. We check the 1545 * type of namespace nodes, so this should be ok. 1546 */ 1547 static void 1548 acpi_probe_children(device_t bus) 1549 { 1550 1551 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1552 1553 /* 1554 * Scan the namespace and insert placeholders for all the devices that 1555 * we find. We also probe/attach any early devices. 1556 * 1557 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1558 * we want to create nodes for all devices, not just those that are 1559 * currently present. (This assumes that we don't want to create/remove 1560 * devices as they appear, which might be smarter.) 1561 */ 1562 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1563 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, 1564 acpi_probe_child, NULL, bus, NULL); 1565 1566 /* Pre-allocate resources for our rman from any sysresource devices. */ 1567 acpi_sysres_alloc(bus); 1568 /* Create any static children by calling device identify methods. */ 1569 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1570 bus_generic_probe(bus); 1571 1572 /* Probe/attach all children, created staticly and from the namespace. */ 1573 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 1574 bus_generic_attach(bus); 1575 1576 /* 1577 * Some of these children may have attached others as part of their attach 1578 * process (eg. the root PCI bus driver), so rescan. 1579 */ 1580 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 1581 bus_generic_attach(bus); 1582 1583 /* Attach wake sysctls. */ 1584 acpi_wake_sysctl_walk(bus); 1585 1586 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1587 return_VOID; 1588 } 1589 1590 /* 1591 * Determine the probe order for a given device. 1592 */ 1593 static void 1594 acpi_probe_order(ACPI_HANDLE handle, int *order) 1595 { 1596 ACPI_OBJECT_TYPE type; 1597 1598 /* 1599 * 1. I/O port and memory system resource holders 1600 * 2. Embedded controllers (to handle early accesses) 1601 * 3. PCI Link Devices 1602 * 100000. CPUs 1603 */ 1604 AcpiGetType(handle, &type); 1605 if (acpi_MatchHid(handle, "PNP0C01") || acpi_MatchHid(handle, "PNP0C02")) 1606 *order = 1; 1607 else if (acpi_MatchHid(handle, "PNP0C09")) 1608 *order = 2; 1609 else if (acpi_MatchHid(handle, "PNP0C0F")) 1610 *order = 3; 1611 else if (type == ACPI_TYPE_PROCESSOR) 1612 *order = 100000; 1613 } 1614 1615 /* 1616 * Evaluate a child device and determine whether we might attach a device to 1617 * it. 1618 */ 1619 static ACPI_STATUS 1620 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1621 { 1622 struct acpi_prw_data prw; 1623 ACPI_OBJECT_TYPE type; 1624 ACPI_HANDLE h; 1625 device_t bus, child; 1626 int order; 1627 char *handle_str; 1628 1629 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1630 1631 if (acpi_disabled("children")) 1632 return_ACPI_STATUS (AE_OK); 1633 1634 /* Skip this device if we think we'll have trouble with it. */ 1635 if (acpi_avoid(handle)) 1636 return_ACPI_STATUS (AE_OK); 1637 1638 bus = (device_t)context; 1639 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1640 handle_str = acpi_name(handle); 1641 switch (type) { 1642 case ACPI_TYPE_DEVICE: 1643 /* 1644 * Since we scan from \, be sure to skip system scope objects. 1645 * \_SB_ and \_TZ_ are defined in ACPICA as devices to work around 1646 * BIOS bugs. For example, \_SB_ is to allow \_SB_._INI to be run 1647 * during the intialization and \_TZ_ is to support Notify() on it. 1648 */ 1649 if (strcmp(handle_str, "\\_SB_") == 0 || 1650 strcmp(handle_str, "\\_TZ_") == 0) 1651 break; 1652 1653 if (acpi_parse_prw(handle, &prw) == 0) 1654 AcpiSetupGpeForWake(handle, prw.gpe_handle, prw.gpe_bit); 1655 1656 /* FALLTHROUGH */ 1657 case ACPI_TYPE_PROCESSOR: 1658 case ACPI_TYPE_THERMAL: 1659 case ACPI_TYPE_POWER: 1660 /* 1661 * Create a placeholder device for this node. Sort the 1662 * placeholder so that the probe/attach passes will run 1663 * breadth-first. Orders less than ACPI_DEV_BASE_ORDER 1664 * are reserved for special objects (i.e., system 1665 * resources). CPU devices have a very high order to 1666 * ensure they are probed after other devices. 1667 */ 1668 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str)); 1669 order = level * 10 + 100; 1670 acpi_probe_order(handle, &order); 1671 child = BUS_ADD_CHILD(bus, bus, order, NULL, -1); 1672 if (child == NULL) 1673 break; 1674 1675 /* Associate the handle with the device_t and vice versa. */ 1676 acpi_set_handle(child, handle); 1677 AcpiAttachData(handle, acpi_fake_objhandler, child); 1678 1679 /* 1680 * Check that the device is present. If it's not present, 1681 * leave it disabled (so that we have a device_t attached to 1682 * the handle, but we don't probe it). 1683 * 1684 * XXX PCI link devices sometimes report "present" but not 1685 * "functional" (i.e. if disabled). Go ahead and probe them 1686 * anyway since we may enable them later. 1687 */ 1688 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 1689 /* Never disable PCI link devices. */ 1690 if (acpi_MatchHid(handle, "PNP0C0F")) 1691 break; 1692 /* 1693 * Docking stations should remain enabled since the system 1694 * may be undocked at boot. 1695 */ 1696 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h))) 1697 break; 1698 1699 device_disable(child); 1700 break; 1701 } 1702 1703 /* 1704 * Get the device's resource settings and attach them. 1705 * Note that if the device has _PRS but no _CRS, we need 1706 * to decide when it's appropriate to try to configure the 1707 * device. Ignore the return value here; it's OK for the 1708 * device not to have any resources. 1709 */ 1710 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 1711 break; 1712 } 1713 } 1714 1715 return_ACPI_STATUS (AE_OK); 1716 } 1717 1718 /* 1719 * AcpiAttachData() requires an object handler but never uses it. This is a 1720 * placeholder object handler so we can store a device_t in an ACPI_HANDLE. 1721 */ 1722 void 1723 acpi_fake_objhandler(ACPI_HANDLE h, void *data) 1724 { 1725 } 1726 1727 static void 1728 acpi_shutdown_final(void *arg, int howto) 1729 { 1730 struct acpi_softc *sc; 1731 ACPI_STATUS status; 1732 1733 /* 1734 * XXX Shutdown code should only run on the BSP (cpuid 0). 1735 * Some chipsets do not power off the system correctly if called from 1736 * an AP. 1737 */ 1738 sc = arg; 1739 if ((howto & RB_POWEROFF) != 0) { 1740 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 1741 if (ACPI_FAILURE(status)) { 1742 kprintf("AcpiEnterSleepStatePrep failed - %s\n", 1743 AcpiFormatException(status)); 1744 return; 1745 } 1746 kprintf("Powering system off using ACPI\n"); 1747 ACPI_DISABLE_IRQS(); 1748 status = AcpiEnterSleepState(ACPI_STATE_S5); 1749 if (ACPI_FAILURE(status)) { 1750 kprintf("ACPI power-off failed - %s\n", AcpiFormatException(status)); 1751 } else { 1752 DELAY(1000000); 1753 kprintf("ACPI power-off failed - timeout\n"); 1754 } 1755 } else if ((howto & RB_HALT) == 0 && sc->acpi_handle_reboot) { 1756 /* Reboot using the reset register. */ 1757 status = AcpiReset(); 1758 if (ACPI_FAILURE(status)) { 1759 if (status != AE_NOT_EXIST) 1760 kprintf("ACPI reset failed - %s\n", AcpiFormatException(status)); 1761 } else { 1762 DELAY(1000000); 1763 kprintf("ACPI reset failed - timeout\n"); 1764 } 1765 } else if (sc->acpi_do_disable && panicstr == NULL) { 1766 /* 1767 * Only disable ACPI if the user requested. On some systems, writing 1768 * the disable value to SMI_CMD hangs the system. 1769 */ 1770 kprintf("Shutting down ACPI\n"); 1771 AcpiTerminate(); 1772 } 1773 } 1774 1775 static void 1776 acpi_enable_fixed_events(struct acpi_softc *sc) 1777 { 1778 static int first_time = 1; 1779 1780 /* Enable and clear fixed events and install handlers. */ 1781 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) { 1782 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 1783 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 1784 acpi_event_power_button_sleep, sc); 1785 if (first_time) 1786 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 1787 } 1788 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) { 1789 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 1790 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 1791 acpi_event_sleep_button_sleep, sc); 1792 if (first_time) 1793 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 1794 } 1795 1796 first_time = 0; 1797 } 1798 1799 /* 1800 * Returns true if the device is actually present and should 1801 * be attached to. This requires the present, enabled, UI-visible 1802 * and diagnostics-passed bits to be set. 1803 */ 1804 BOOLEAN 1805 acpi_DeviceIsPresent(device_t dev) 1806 { 1807 ACPI_DEVICE_INFO *devinfo; 1808 ACPI_HANDLE h; 1809 ACPI_STATUS error; 1810 int ret; 1811 1812 ret = FALSE; 1813 if ((h = acpi_get_handle(dev)) == NULL) 1814 return (FALSE); 1815 error = AcpiGetObjectInfo(h, &devinfo); 1816 if (ACPI_FAILURE(error)) 1817 return (FALSE); 1818 1819 /* If no _STA method, must be present */ 1820 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1821 ret = TRUE; 1822 1823 /* Return true for 'present' and 'functioning' */ 1824 if (ACPI_DEVICE_PRESENT(devinfo->CurrentStatus)) 1825 ret = TRUE; 1826 1827 AcpiOsFree(devinfo); 1828 return (ret); 1829 } 1830 1831 /* 1832 * Returns true if the battery is actually present and inserted. 1833 */ 1834 BOOLEAN 1835 acpi_BatteryIsPresent(device_t dev) 1836 { 1837 ACPI_DEVICE_INFO *devinfo; 1838 ACPI_HANDLE h; 1839 ACPI_STATUS error; 1840 int ret; 1841 1842 ret = FALSE; 1843 if ((h = acpi_get_handle(dev)) == NULL) 1844 return (FALSE); 1845 error = AcpiGetObjectInfo(h, &devinfo); 1846 if (ACPI_FAILURE(error)) 1847 return (FALSE); 1848 1849 /* If no _STA method, must be present */ 1850 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1851 ret = TRUE; 1852 1853 /* Return true for 'present', 'battery present', and 'functioning' */ 1854 if (ACPI_BATTERY_PRESENT(devinfo->CurrentStatus)) 1855 ret = TRUE; 1856 1857 AcpiOsFree(devinfo); 1858 return (ret); 1859 } 1860 1861 /* 1862 * Match a HID string against a handle 1863 */ 1864 BOOLEAN 1865 acpi_MatchHid(ACPI_HANDLE h, const char *hid) 1866 { 1867 ACPI_DEVICE_INFO *devinfo; 1868 ACPI_STATUS error; 1869 int ret, i; 1870 1871 ret = FALSE; 1872 if (hid == NULL || h == NULL) 1873 return (ret); 1874 error = AcpiGetObjectInfo(h, &devinfo); 1875 if (ACPI_FAILURE(error)) 1876 return (ret); 1877 1878 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 1879 strcmp(hid, devinfo->HardwareId.String) == 0) 1880 ret = TRUE; 1881 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) { 1882 for (i = 0; i < devinfo->CompatibleIdList.Count; i++) { 1883 if (strcmp(hid, devinfo->CompatibleIdList.Ids[i].String) == 0) { 1884 ret = TRUE; 1885 break; 1886 } 1887 } 1888 } 1889 1890 AcpiOsFree(devinfo); 1891 return (ret); 1892 } 1893 1894 /* 1895 * Return the handle of a named object within our scope, ie. that of (parent) 1896 * or one if its parents. 1897 */ 1898 ACPI_STATUS 1899 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 1900 { 1901 ACPI_HANDLE r; 1902 ACPI_STATUS status; 1903 1904 /* Walk back up the tree to the root */ 1905 for (;;) { 1906 status = AcpiGetHandle(parent, path, &r); 1907 if (ACPI_SUCCESS(status)) { 1908 *result = r; 1909 return (AE_OK); 1910 } 1911 /* XXX Return error here? */ 1912 if (status != AE_NOT_FOUND) 1913 return (AE_OK); 1914 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 1915 return (AE_NOT_FOUND); 1916 parent = r; 1917 } 1918 } 1919 1920 /* 1921 * Allocate a buffer with a preset data size. 1922 */ 1923 ACPI_BUFFER * 1924 acpi_AllocBuffer(int size) 1925 { 1926 ACPI_BUFFER *buf; 1927 1928 if ((buf = kmalloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 1929 return (NULL); 1930 buf->Length = size; 1931 buf->Pointer = (void *)(buf + 1); 1932 return (buf); 1933 } 1934 1935 ACPI_STATUS 1936 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 1937 { 1938 ACPI_OBJECT arg1; 1939 ACPI_OBJECT_LIST args; 1940 1941 arg1.Type = ACPI_TYPE_INTEGER; 1942 arg1.Integer.Value = number; 1943 args.Count = 1; 1944 args.Pointer = &arg1; 1945 1946 return (AcpiEvaluateObject(handle, path, &args, NULL)); 1947 } 1948 1949 /* 1950 * Evaluate a path that should return an integer. 1951 */ 1952 ACPI_STATUS 1953 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 1954 { 1955 ACPI_STATUS status; 1956 ACPI_BUFFER buf; 1957 ACPI_OBJECT param; 1958 1959 if (handle == NULL) 1960 handle = ACPI_ROOT_OBJECT; 1961 1962 /* 1963 * Assume that what we've been pointed at is an Integer object, or 1964 * a method that will return an Integer. 1965 */ 1966 buf.Pointer = ¶m; 1967 buf.Length = sizeof(param); 1968 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1969 if (ACPI_SUCCESS(status)) { 1970 if (param.Type == ACPI_TYPE_INTEGER) 1971 *number = param.Integer.Value; 1972 else 1973 status = AE_TYPE; 1974 } 1975 1976 /* 1977 * In some applications, a method that's expected to return an Integer 1978 * may instead return a Buffer (probably to simplify some internal 1979 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 1980 * convert it into an Integer as best we can. 1981 * 1982 * This is a hack. 1983 */ 1984 if (status == AE_BUFFER_OVERFLOW) { 1985 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 1986 status = AE_NO_MEMORY; 1987 } else { 1988 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1989 if (ACPI_SUCCESS(status)) 1990 status = acpi_ConvertBufferToInteger(&buf, number); 1991 AcpiOsFree(buf.Pointer); 1992 } 1993 } 1994 return (status); 1995 } 1996 1997 ACPI_STATUS 1998 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 1999 { 2000 ACPI_OBJECT *p; 2001 UINT8 *val; 2002 int i; 2003 2004 p = (ACPI_OBJECT *)bufp->Pointer; 2005 if (p->Type == ACPI_TYPE_INTEGER) { 2006 *number = p->Integer.Value; 2007 return (AE_OK); 2008 } 2009 if (p->Type != ACPI_TYPE_BUFFER) 2010 return (AE_TYPE); 2011 if (p->Buffer.Length > sizeof(int)) 2012 return (AE_BAD_DATA); 2013 2014 *number = 0; 2015 val = p->Buffer.Pointer; 2016 for (i = 0; i < p->Buffer.Length; i++) 2017 *number += val[i] << (i * 8); 2018 return (AE_OK); 2019 } 2020 2021 /* 2022 * Iterate over the elements of an a package object, calling the supplied 2023 * function for each element. 2024 * 2025 * XXX possible enhancement might be to abort traversal on error. 2026 */ 2027 ACPI_STATUS 2028 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 2029 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 2030 { 2031 ACPI_OBJECT *comp; 2032 int i; 2033 2034 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 2035 return (AE_BAD_PARAMETER); 2036 2037 /* Iterate over components */ 2038 i = 0; 2039 comp = pkg->Package.Elements; 2040 for (; i < pkg->Package.Count; i++, comp++) 2041 func(comp, arg); 2042 2043 return (AE_OK); 2044 } 2045 2046 /* 2047 * Find the (index)th resource object in a set. 2048 */ 2049 ACPI_STATUS 2050 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 2051 { 2052 ACPI_RESOURCE *rp; 2053 int i; 2054 2055 rp = (ACPI_RESOURCE *)buf->Pointer; 2056 i = index; 2057 while (i-- > 0) { 2058 /* Range check */ 2059 if (rp > (ACPI_RESOURCE *)((uint8_t *)buf->Pointer + buf->Length)) 2060 return (AE_BAD_PARAMETER); 2061 2062 /* Check for terminator */ 2063 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2064 return (AE_NOT_FOUND); 2065 rp = ACPI_NEXT_RESOURCE(rp); 2066 } 2067 if (resp != NULL) 2068 *resp = rp; 2069 2070 return (AE_OK); 2071 } 2072 2073 /* 2074 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 2075 * 2076 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 2077 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 2078 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 2079 * resources. 2080 */ 2081 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 2082 2083 ACPI_STATUS 2084 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 2085 { 2086 ACPI_RESOURCE *rp; 2087 void *newp; 2088 2089 /* Initialise the buffer if necessary. */ 2090 if (buf->Pointer == NULL) { 2091 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 2092 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 2093 return (AE_NO_MEMORY); 2094 rp = (ACPI_RESOURCE *)buf->Pointer; 2095 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2096 rp->Length = 0; 2097 } 2098 if (res == NULL) 2099 return (AE_OK); 2100 2101 /* 2102 * Scan the current buffer looking for the terminator. 2103 * This will either find the terminator or hit the end 2104 * of the buffer and return an error. 2105 */ 2106 rp = (ACPI_RESOURCE *)buf->Pointer; 2107 for (;;) { 2108 /* Range check, don't go outside the buffer */ 2109 if (rp >= (ACPI_RESOURCE *)((uint8_t *)buf->Pointer + buf->Length)) 2110 return (AE_BAD_PARAMETER); 2111 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2112 break; 2113 rp = ACPI_NEXT_RESOURCE(rp); 2114 } 2115 2116 /* 2117 * Check the size of the buffer and expand if required. 2118 * 2119 * Required size is: 2120 * size of existing resources before terminator + 2121 * size of new resource and header + 2122 * size of terminator. 2123 * 2124 * Note that this loop should really only run once, unless 2125 * for some reason we are stuffing a *really* huge resource. 2126 */ 2127 while ((((uint8_t *)rp - (uint8_t *)buf->Pointer) + 2128 res->Length + ACPI_RS_SIZE_NO_DATA + 2129 ACPI_RS_SIZE_MIN) >= buf->Length) { 2130 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 2131 return (AE_NO_MEMORY); 2132 bcopy(buf->Pointer, newp, buf->Length); 2133 rp = (ACPI_RESOURCE *)((uint8_t *)newp + 2134 ((uint8_t *)rp - (uint8_t *)buf->Pointer)); 2135 AcpiOsFree(buf->Pointer); 2136 buf->Pointer = newp; 2137 buf->Length += buf->Length; 2138 } 2139 2140 /* Insert the new resource. */ 2141 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA); 2142 2143 /* And add the terminator. */ 2144 rp = ACPI_NEXT_RESOURCE(rp); 2145 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2146 rp->Length = 0; 2147 2148 return (AE_OK); 2149 } 2150 2151 /* 2152 * Set interrupt model. 2153 */ 2154 ACPI_STATUS 2155 acpi_SetIntrModel(int model) 2156 { 2157 2158 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 2159 } 2160 2161 /* 2162 * DEPRECATED. This interface has serious deficiencies and will be 2163 * removed. 2164 * 2165 * Immediately enter the sleep state. In the old model, acpiconf(8) ran 2166 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this. 2167 */ 2168 ACPI_STATUS 2169 acpi_SetSleepState(struct acpi_softc *sc, int state) 2170 { 2171 static int once; 2172 2173 if (!once) { 2174 kprintf( 2175 "warning: acpi_SetSleepState() deprecated, need to update your software\n"); 2176 once = 1; 2177 } 2178 return (acpi_EnterSleepState(sc, state)); 2179 } 2180 2181 static void 2182 acpi_sleep_force(void *arg) 2183 { 2184 struct acpi_softc *sc; 2185 2186 kprintf("acpi: suspend request timed out, forcing sleep now\n"); 2187 sc = arg; 2188 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2189 kprintf("acpi: force sleep state S%d failed\n", sc->acpi_next_sstate); 2190 } 2191 2192 /* 2193 * Request that the system enter the given suspend state. All /dev/apm 2194 * devices and devd(8) will be notified. Userland then has a chance to 2195 * save state and acknowledge the request. The system sleeps once all 2196 * acks are in. 2197 */ 2198 int 2199 acpi_ReqSleepState(struct acpi_softc *sc, int state) 2200 { 2201 #ifdef notyet 2202 struct apm_clone_data *clone; 2203 #endif 2204 2205 if (state < ACPI_STATE_S1 || state > ACPI_STATE_S5) 2206 return (EINVAL); 2207 2208 /* S5 (soft-off) should be entered directly with no waiting. */ 2209 if (state == ACPI_STATE_S5) { 2210 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, state))) 2211 return (0); 2212 else 2213 return (ENXIO); 2214 } 2215 2216 #if !defined(__i386__) 2217 /* This platform does not support acpi suspend/resume. */ 2218 return (EOPNOTSUPP); 2219 #endif 2220 2221 /* If a suspend request is already in progress, just return. */ 2222 ACPI_LOCK(acpi); 2223 if (sc->acpi_next_sstate != 0) { 2224 ACPI_UNLOCK(acpi); 2225 return (0); 2226 } 2227 2228 /* Record the pending state and notify all apm devices. */ 2229 sc->acpi_next_sstate = state; 2230 #if 0 2231 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2232 clone->notify_status = APM_EV_NONE; 2233 if ((clone->flags & ACPI_EVF_DEVD) == 0) { 2234 KNOTE(&clone->sel_read.si_note, 0); 2235 } 2236 } 2237 #endif 2238 2239 /* If devd(8) is not running, immediately enter the sleep state. */ 2240 if (devctl_process_running() == FALSE) { 2241 ACPI_UNLOCK(acpi); 2242 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) { 2243 return (0); 2244 } else { 2245 return (ENXIO); 2246 } 2247 } 2248 2249 /* Now notify devd(8) also. */ 2250 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state); 2251 2252 /* 2253 * Set a timeout to fire if userland doesn't ack the suspend request 2254 * in time. This way we still eventually go to sleep if we were 2255 * overheating or running low on battery, even if userland is hung. 2256 * We cancel this timeout once all userland acks are in or the 2257 * suspend request is aborted. 2258 */ 2259 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc); 2260 ACPI_UNLOCK(acpi); 2261 return (0); 2262 } 2263 2264 /* 2265 * Acknowledge (or reject) a pending sleep state. The caller has 2266 * prepared for suspend and is now ready for it to proceed. If the 2267 * error argument is non-zero, it indicates suspend should be cancelled 2268 * and gives an errno value describing why. Once all votes are in, 2269 * we suspend the system. 2270 */ 2271 int 2272 acpi_AckSleepState(struct apm_clone_data *clone, int error) 2273 { 2274 struct acpi_softc *sc; 2275 int ret, sleeping; 2276 2277 #if !defined(__i386__) 2278 /* This platform does not support acpi suspend/resume. */ 2279 return (EOPNOTSUPP); 2280 #endif 2281 2282 /* If no pending sleep state, return an error. */ 2283 ACPI_LOCK(acpi); 2284 sc = clone->acpi_sc; 2285 if (sc->acpi_next_sstate == 0) { 2286 ACPI_UNLOCK(acpi); 2287 return (ENXIO); 2288 } 2289 2290 /* Caller wants to abort suspend process. */ 2291 if (error) { 2292 sc->acpi_next_sstate = 0; 2293 callout_stop(&sc->susp_force_to); 2294 kprintf("acpi: listener on %s cancelled the pending suspend\n", 2295 devtoname(clone->cdev)); 2296 ACPI_UNLOCK(acpi); 2297 return (0); 2298 } 2299 2300 /* 2301 * Mark this device as acking the suspend request. Then, walk through 2302 * all devices, seeing if they agree yet. We only count devices that 2303 * are writable since read-only devices couldn't ack the request. 2304 */ 2305 clone->notify_status = APM_EV_ACKED; 2306 sleeping = TRUE; 2307 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2308 if ((clone->flags & ACPI_EVF_WRITE) != 0 && 2309 clone->notify_status != APM_EV_ACKED) { 2310 sleeping = FALSE; 2311 break; 2312 } 2313 } 2314 2315 /* If all devices have voted "yes", we will suspend now. */ 2316 if (sleeping) 2317 callout_stop(&sc->susp_force_to); 2318 ACPI_UNLOCK(acpi); 2319 ret = 0; 2320 if (sleeping) { 2321 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2322 ret = ENODEV; 2323 } 2324 2325 return (ret); 2326 } 2327 2328 static void 2329 acpi_sleep_enable(void *arg) 2330 { 2331 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0; 2332 } 2333 2334 enum acpi_sleep_state { 2335 ACPI_SS_NONE, 2336 ACPI_SS_GPE_SET, 2337 ACPI_SS_DEV_SUSPEND, 2338 ACPI_SS_SLP_PREP, 2339 ACPI_SS_SLEPT, 2340 }; 2341 2342 /* 2343 * Enter the desired system sleep state. 2344 * 2345 * Currently we support S1-S5 but S4 is only S4BIOS 2346 */ 2347 static ACPI_STATUS 2348 acpi_EnterSleepState(struct acpi_softc *sc, int state) 2349 { 2350 ACPI_STATUS status; 2351 UINT8 TypeA; 2352 UINT8 TypeB; 2353 enum acpi_sleep_state slp_state; 2354 2355 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2356 2357 /* Re-entry once we're suspending is not allowed. */ 2358 status = AE_OK; 2359 ACPI_LOCK(acpi); 2360 if (sc->acpi_sleep_disabled) { 2361 ACPI_UNLOCK(acpi); 2362 kprintf("acpi: suspend request ignored (not ready yet)\n"); 2363 return (AE_ERROR); 2364 } 2365 sc->acpi_sleep_disabled = 1; 2366 ACPI_UNLOCK(acpi); 2367 2368 /* 2369 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE 2370 * drivers need this. 2371 */ 2372 //get_mplock(); 2373 slp_state = ACPI_SS_NONE; 2374 switch (state) { 2375 case ACPI_STATE_S1: 2376 case ACPI_STATE_S2: 2377 case ACPI_STATE_S3: 2378 case ACPI_STATE_S4: 2379 status = AcpiGetSleepTypeData(state, &TypeA, &TypeB); 2380 if (status == AE_NOT_FOUND) { 2381 device_printf(sc->acpi_dev, 2382 "Sleep state S%d not supported by BIOS\n", state); 2383 break; 2384 } else if (ACPI_FAILURE(status)) { 2385 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n", 2386 AcpiFormatException(status)); 2387 break; 2388 } 2389 2390 sc->acpi_sstate = state; 2391 2392 /* Enable any GPEs as appropriate and requested by the user. */ 2393 acpi_wake_prep_walk(state); 2394 slp_state = ACPI_SS_GPE_SET; 2395 2396 /* 2397 * Inform all devices that we are going to sleep. If at least one 2398 * device fails, DEVICE_SUSPEND() automatically resumes the tree. 2399 * 2400 * XXX Note that a better two-pass approach with a 'veto' pass 2401 * followed by a "real thing" pass would be better, but the current 2402 * bus interface does not provide for this. 2403 */ 2404 if (DEVICE_SUSPEND(root_bus) != 0) { 2405 device_printf(sc->acpi_dev, "device_suspend failed\n"); 2406 break; 2407 } 2408 slp_state = ACPI_SS_DEV_SUSPEND; 2409 2410 /* If testing device suspend only, back out of everything here. */ 2411 if (acpi_susp_bounce) 2412 break; 2413 2414 status = AcpiEnterSleepStatePrep(state); 2415 if (ACPI_FAILURE(status)) { 2416 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2417 AcpiFormatException(status)); 2418 break; 2419 } 2420 slp_state = ACPI_SS_SLP_PREP; 2421 2422 if (sc->acpi_sleep_delay > 0) 2423 DELAY(sc->acpi_sleep_delay * 1000000); 2424 2425 if (state != ACPI_STATE_S1) { 2426 acpi_sleep_machdep(sc, state); 2427 2428 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 2429 if (state == ACPI_STATE_S4) 2430 AcpiEnable(); 2431 } else { 2432 ACPI_DISABLE_IRQS(); 2433 status = AcpiEnterSleepState(state); 2434 if (ACPI_FAILURE(status)) { 2435 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 2436 AcpiFormatException(status)); 2437 break; 2438 } 2439 } 2440 slp_state = ACPI_SS_SLEPT; 2441 break; 2442 case ACPI_STATE_S5: 2443 /* 2444 * Shut down cleanly and power off. This will call us back through the 2445 * shutdown handlers. 2446 */ 2447 shutdown_nice(RB_POWEROFF); 2448 break; 2449 case ACPI_STATE_S0: 2450 default: 2451 status = AE_BAD_PARAMETER; 2452 break; 2453 } 2454 2455 /* 2456 * Back out state according to how far along we got in the suspend 2457 * process. This handles both the error and success cases. 2458 */ 2459 sc->acpi_next_sstate = 0; 2460 if (slp_state >= ACPI_SS_GPE_SET) { 2461 acpi_wake_prep_walk(state); 2462 sc->acpi_sstate = ACPI_STATE_S0; 2463 } 2464 if (slp_state >= ACPI_SS_SLP_PREP) 2465 AcpiLeaveSleepState(state); 2466 if (slp_state >= ACPI_SS_DEV_SUSPEND) 2467 DEVICE_RESUME(root_bus); 2468 if (slp_state >= ACPI_SS_SLEPT) 2469 acpi_enable_fixed_events(sc); 2470 2471 /* Allow another sleep request after a while. */ 2472 /* XXX: needs timeout */ 2473 if (state != ACPI_STATE_S5) 2474 acpi_sleep_enable(sc); 2475 2476 /* Run /etc/rc.resume after we are back. */ 2477 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state); 2478 2479 //rel_mplock(); 2480 return_ACPI_STATUS (status); 2481 } 2482 2483 /* Enable or disable the device's GPE. */ 2484 int 2485 acpi_wake_set_enable(device_t dev, int enable) 2486 { 2487 struct acpi_prw_data prw; 2488 ACPI_STATUS status; 2489 int flags; 2490 2491 /* Make sure the device supports waking the system and get the GPE. */ 2492 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 2493 return (ENXIO); 2494 2495 flags = acpi_get_flags(dev); 2496 if (enable) { 2497 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 2498 ACPI_GPE_ENABLE); 2499 if (ACPI_FAILURE(status)) { 2500 device_printf(dev, "enable wake failed\n"); 2501 return (ENXIO); 2502 } 2503 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); 2504 } else { 2505 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 2506 ACPI_GPE_DISABLE); 2507 if (ACPI_FAILURE(status)) { 2508 device_printf(dev, "disable wake failed\n"); 2509 return (ENXIO); 2510 } 2511 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); 2512 } 2513 2514 return (0); 2515 } 2516 2517 static int 2518 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate) 2519 { 2520 struct acpi_prw_data prw; 2521 device_t dev; 2522 2523 /* Check that this is a wake-capable device and get its GPE. */ 2524 if (acpi_parse_prw(handle, &prw) != 0) 2525 return (ENXIO); 2526 dev = acpi_get_device(handle); 2527 2528 /* 2529 * The destination sleep state must be less than (i.e., higher power) 2530 * or equal to the value specified by _PRW. If this GPE cannot be 2531 * enabled for the next sleep state, then disable it. If it can and 2532 * the user requested it be enabled, turn on any required power resources 2533 * and set _PSW. 2534 */ 2535 if (sstate > prw.lowest_wake) { 2536 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_DISABLE); 2537 if (bootverbose) 2538 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n", 2539 acpi_name(handle), sstate); 2540 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) { 2541 acpi_pwr_wake_enable(handle, 1); 2542 acpi_SetInteger(handle, "_PSW", 1); 2543 if (bootverbose) 2544 device_printf(dev, "wake_prep enabled for %s (S%d)\n", 2545 acpi_name(handle), sstate); 2546 } 2547 2548 return (0); 2549 } 2550 2551 static int 2552 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate) 2553 { 2554 struct acpi_prw_data prw; 2555 device_t dev; 2556 2557 /* 2558 * Check that this is a wake-capable device and get its GPE. Return 2559 * now if the user didn't enable this device for wake. 2560 */ 2561 if (acpi_parse_prw(handle, &prw) != 0) 2562 return (ENXIO); 2563 dev = acpi_get_device(handle); 2564 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0) 2565 return (0); 2566 2567 /* 2568 * If this GPE couldn't be enabled for the previous sleep state, it was 2569 * disabled before going to sleep so re-enable it. If it was enabled, 2570 * clear _PSW and turn off any power resources it used. 2571 */ 2572 if (sstate > prw.lowest_wake) { 2573 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_ENABLE); 2574 if (bootverbose) 2575 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle)); 2576 } else { 2577 acpi_SetInteger(handle, "_PSW", 0); 2578 acpi_pwr_wake_enable(handle, 0); 2579 if (bootverbose) 2580 device_printf(dev, "run_prep cleaned up for %s\n", 2581 acpi_name(handle)); 2582 } 2583 2584 return (0); 2585 } 2586 2587 static ACPI_STATUS 2588 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 2589 { 2590 int sstate; 2591 2592 /* If suspending, run the sleep prep function, otherwise wake. */ 2593 sstate = *(int *)context; 2594 if (AcpiGbl_SystemAwakeAndRunning) 2595 acpi_wake_sleep_prep(handle, sstate); 2596 else 2597 acpi_wake_run_prep(handle, sstate); 2598 return (AE_OK); 2599 } 2600 2601 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */ 2602 static int 2603 acpi_wake_prep_walk(int sstate) 2604 { 2605 ACPI_HANDLE sb_handle; 2606 2607 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) { 2608 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100, 2609 acpi_wake_prep, NULL, &sstate, NULL); 2610 } 2611 return (0); 2612 } 2613 2614 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */ 2615 static int 2616 acpi_wake_sysctl_walk(device_t dev) 2617 { 2618 #ifdef notyet 2619 int error, i, numdevs; 2620 device_t *devlist; 2621 device_t child; 2622 ACPI_STATUS status; 2623 2624 error = device_get_children(dev, &devlist, &numdevs); 2625 if (error != 0 || numdevs == 0) { 2626 if (numdevs == 0) 2627 kfree(devlist, M_TEMP); 2628 return (error); 2629 } 2630 for (i = 0; i < numdevs; i++) { 2631 child = devlist[i]; 2632 acpi_wake_sysctl_walk(child); 2633 if (!device_is_attached(child)) 2634 continue; 2635 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL); 2636 if (ACPI_SUCCESS(status)) { 2637 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child), 2638 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO, 2639 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0, 2640 acpi_wake_set_sysctl, "I", "Device set to wake the system"); 2641 } 2642 } 2643 kfree(devlist, M_TEMP); 2644 #endif 2645 2646 return (0); 2647 } 2648 2649 #ifdef notyet 2650 /* Enable or disable wake from userland. */ 2651 static int 2652 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS) 2653 { 2654 int enable, error; 2655 device_t dev; 2656 2657 dev = (device_t)arg1; 2658 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0; 2659 2660 error = sysctl_handle_int(oidp, &enable, 0, req); 2661 if (error != 0 || req->newptr == NULL) 2662 return (error); 2663 if (enable != 0 && enable != 1) 2664 return (EINVAL); 2665 2666 return (acpi_wake_set_enable(dev, enable)); 2667 } 2668 #endif 2669 2670 /* Parse a device's _PRW into a structure. */ 2671 int 2672 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) 2673 { 2674 ACPI_STATUS status; 2675 ACPI_BUFFER prw_buffer; 2676 ACPI_OBJECT *res, *res2; 2677 int error, i, power_count; 2678 2679 if (h == NULL || prw == NULL) 2680 return (EINVAL); 2681 2682 /* 2683 * The _PRW object (7.2.9) is only required for devices that have the 2684 * ability to wake the system from a sleeping state. 2685 */ 2686 error = EINVAL; 2687 prw_buffer.Pointer = NULL; 2688 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 2689 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 2690 if (ACPI_FAILURE(status)) 2691 return (ENOENT); 2692 res = (ACPI_OBJECT *)prw_buffer.Pointer; 2693 if (res == NULL) 2694 return (ENOENT); 2695 if (!ACPI_PKG_VALID(res, 2)) 2696 goto out; 2697 2698 /* 2699 * Element 1 of the _PRW object: 2700 * The lowest power system sleeping state that can be entered while still 2701 * providing wake functionality. The sleeping state being entered must 2702 * be less than (i.e., higher power) or equal to this value. 2703 */ 2704 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) 2705 goto out; 2706 2707 /* 2708 * Element 0 of the _PRW object: 2709 */ 2710 switch (res->Package.Elements[0].Type) { 2711 case ACPI_TYPE_INTEGER: 2712 /* 2713 * If the data type of this package element is numeric, then this 2714 * _PRW package element is the bit index in the GPEx_EN, in the 2715 * GPE blocks described in the FADT, of the enable bit that is 2716 * enabled for the wake event. 2717 */ 2718 prw->gpe_handle = NULL; 2719 prw->gpe_bit = res->Package.Elements[0].Integer.Value; 2720 error = 0; 2721 break; 2722 case ACPI_TYPE_PACKAGE: 2723 /* 2724 * If the data type of this package element is a package, then this 2725 * _PRW package element is itself a package containing two 2726 * elements. The first is an object reference to the GPE Block 2727 * device that contains the GPE that will be triggered by the wake 2728 * event. The second element is numeric and it contains the bit 2729 * index in the GPEx_EN, in the GPE Block referenced by the 2730 * first element in the package, of the enable bit that is enabled for 2731 * the wake event. 2732 * 2733 * For example, if this field is a package then it is of the form: 2734 * Package() {\_SB.PCI0.ISA.GPE, 2} 2735 */ 2736 res2 = &res->Package.Elements[0]; 2737 if (!ACPI_PKG_VALID(res2, 2)) 2738 goto out; 2739 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 2740 if (prw->gpe_handle == NULL) 2741 goto out; 2742 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) 2743 goto out; 2744 error = 0; 2745 break; 2746 default: 2747 goto out; 2748 } 2749 2750 /* Elements 2 to N of the _PRW object are power resources. */ 2751 power_count = res->Package.Count - 2; 2752 if (power_count > ACPI_PRW_MAX_POWERRES) { 2753 kprintf("ACPI device %s has too many power resources\n", acpi_name(h)); 2754 power_count = 0; 2755 } 2756 prw->power_res_count = power_count; 2757 for (i = 0; i < power_count; i++) 2758 prw->power_res[i] = res->Package.Elements[i]; 2759 2760 out: 2761 if (prw_buffer.Pointer != NULL) 2762 AcpiOsFree(prw_buffer.Pointer); 2763 return (error); 2764 } 2765 2766 /* 2767 * ACPI Event Handlers 2768 */ 2769 2770 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 2771 2772 static void 2773 acpi_system_eventhandler_sleep(void *arg, int state) 2774 { 2775 int ret; 2776 2777 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2778 2779 /* Check if button action is disabled. */ 2780 if (state == ACPI_S_STATES_MAX + 1) 2781 return; 2782 2783 /* Request that the system prepare to enter the given suspend state. */ 2784 ret = acpi_ReqSleepState((struct acpi_softc *)arg, state); 2785 if (ret != 0) 2786 kprintf("acpi: request to enter state S%d failed (err %d)\n", 2787 state, ret); 2788 2789 return_VOID; 2790 } 2791 2792 static void 2793 acpi_system_eventhandler_wakeup(void *arg, int state) 2794 { 2795 2796 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2797 2798 /* Currently, nothing to do for wakeup. */ 2799 2800 return_VOID; 2801 } 2802 2803 /* 2804 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 2805 */ 2806 UINT32 2807 acpi_event_power_button_sleep(void *context) 2808 { 2809 struct acpi_softc *sc = (struct acpi_softc *)context; 2810 2811 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2812 2813 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 2814 2815 return_VALUE (ACPI_INTERRUPT_HANDLED); 2816 } 2817 2818 UINT32 2819 acpi_event_power_button_wake(void *context) 2820 { 2821 struct acpi_softc *sc = (struct acpi_softc *)context; 2822 2823 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2824 2825 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 2826 2827 return_VALUE (ACPI_INTERRUPT_HANDLED); 2828 } 2829 2830 UINT32 2831 acpi_event_sleep_button_sleep(void *context) 2832 { 2833 struct acpi_softc *sc = (struct acpi_softc *)context; 2834 2835 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2836 2837 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 2838 2839 return_VALUE (ACPI_INTERRUPT_HANDLED); 2840 } 2841 2842 UINT32 2843 acpi_event_sleep_button_wake(void *context) 2844 { 2845 struct acpi_softc *sc = (struct acpi_softc *)context; 2846 2847 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2848 2849 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 2850 2851 return_VALUE (ACPI_INTERRUPT_HANDLED); 2852 } 2853 2854 /* 2855 * XXX This static buffer is suboptimal. There is no locking so only 2856 * use this for single-threaded callers. 2857 */ 2858 char * 2859 acpi_name(ACPI_HANDLE handle) 2860 { 2861 ACPI_BUFFER buf; 2862 static char data[256]; 2863 2864 buf.Length = sizeof(data); 2865 buf.Pointer = data; 2866 2867 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf))) 2868 return (data); 2869 return ("(unknown)"); 2870 } 2871 2872 /* 2873 * Debugging/bug-avoidance. Avoid trying to fetch info on various 2874 * parts of the namespace. 2875 */ 2876 int 2877 acpi_avoid(ACPI_HANDLE handle) 2878 { 2879 char *cp, *env, *np; 2880 int len; 2881 2882 np = acpi_name(handle); 2883 if (*np == '\\') 2884 np++; 2885 if ((env = kgetenv("debug.acpi.avoid")) == NULL) 2886 return (0); 2887 2888 /* Scan the avoid list checking for a match */ 2889 cp = env; 2890 for (;;) { 2891 while (*cp != 0 && isspace(*cp)) 2892 cp++; 2893 if (*cp == 0) 2894 break; 2895 len = 0; 2896 while (cp[len] != 0 && !isspace(cp[len])) 2897 len++; 2898 if (!strncmp(cp, np, len)) { 2899 kfreeenv(env); 2900 return(1); 2901 } 2902 cp += len; 2903 } 2904 kfreeenv(env); 2905 2906 return (0); 2907 } 2908 2909 /* 2910 * Debugging/bug-avoidance. Disable ACPI subsystem components. 2911 */ 2912 int 2913 acpi_disabled(char *subsys) 2914 { 2915 char *cp, *env; 2916 int len; 2917 2918 if ((env = kgetenv("debug.acpi.disabled")) == NULL) 2919 return (0); 2920 if (strcmp(env, "all") == 0) { 2921 kfreeenv(env); 2922 return (1); 2923 } 2924 2925 /* Scan the disable list, checking for a match. */ 2926 cp = env; 2927 for (;;) { 2928 while (*cp != '\0' && isspace(*cp)) 2929 cp++; 2930 if (*cp == '\0') 2931 break; 2932 len = 0; 2933 while (cp[len] != '\0' && !isspace(cp[len])) 2934 len++; 2935 if (strncmp(cp, subsys, len) == 0) { 2936 kfreeenv(env); 2937 return (1); 2938 } 2939 cp += len; 2940 } 2941 kfreeenv(env); 2942 2943 return (0); 2944 } 2945 2946 /* 2947 * Debugging/bug-avoidance. Enable ACPI subsystem components. Most 2948 * components are enabled by default. The ones that are not have to be 2949 * enabled via debug.acpi.enabled. 2950 */ 2951 int 2952 acpi_enabled(char *subsys) 2953 { 2954 char *cp, *env; 2955 int len; 2956 2957 if ((env = kgetenv("debug.acpi.enabled")) == NULL) 2958 return (0); 2959 if (strcmp(env, "all") == 0) { 2960 kfreeenv(env); 2961 return (1); 2962 } 2963 2964 /* Scan the enable list, checking for a match. */ 2965 cp = env; 2966 for (;;) { 2967 while (*cp != '\0' && isspace(*cp)) 2968 cp++; 2969 if (*cp == '\0') 2970 break; 2971 len = 0; 2972 while (cp[len] != '\0' && !isspace(cp[len])) 2973 len++; 2974 if (strncmp(cp, subsys, len) == 0) { 2975 kfreeenv(env); 2976 return (1); 2977 } 2978 cp += len; 2979 } 2980 kfreeenv(env); 2981 2982 return (0); 2983 } 2984 2985 /* 2986 * Control interface. 2987 * 2988 * We multiplex ioctls for all participating ACPI devices here. Individual 2989 * drivers wanting to be accessible via /dev/acpi should use the 2990 * register/deregister interface to make their handlers visible. 2991 */ 2992 struct acpi_ioctl_hook 2993 { 2994 TAILQ_ENTRY(acpi_ioctl_hook) link; 2995 u_long cmd; 2996 acpi_ioctl_fn fn; 2997 void *arg; 2998 }; 2999 3000 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 3001 static int acpi_ioctl_hooks_initted; 3002 3003 int 3004 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 3005 { 3006 struct acpi_ioctl_hook *hp; 3007 3008 if ((hp = kmalloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 3009 return (ENOMEM); 3010 hp->cmd = cmd; 3011 hp->fn = fn; 3012 hp->arg = arg; 3013 3014 ACPI_LOCK(acpi); 3015 if (acpi_ioctl_hooks_initted == 0) { 3016 TAILQ_INIT(&acpi_ioctl_hooks); 3017 acpi_ioctl_hooks_initted = 1; 3018 } 3019 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 3020 ACPI_UNLOCK(acpi); 3021 3022 return (0); 3023 } 3024 3025 void 3026 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 3027 { 3028 struct acpi_ioctl_hook *hp; 3029 3030 ACPI_LOCK(acpi); 3031 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 3032 if (hp->cmd == cmd && hp->fn == fn) 3033 break; 3034 3035 if (hp != NULL) { 3036 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 3037 kfree(hp, M_ACPIDEV); 3038 } 3039 ACPI_UNLOCK(acpi); 3040 } 3041 3042 static int 3043 acpiopen(struct dev_open_args *ap) 3044 { 3045 return (0); 3046 } 3047 3048 static int 3049 acpiclose(struct dev_close_args *ap) 3050 { 3051 return (0); 3052 } 3053 3054 static int 3055 acpiioctl(struct dev_ioctl_args *ap) 3056 { 3057 struct acpi_softc *sc; 3058 struct acpi_ioctl_hook *hp; 3059 int error, state; 3060 3061 error = 0; 3062 hp = NULL; 3063 sc = ap->a_head.a_dev->si_drv1; 3064 3065 /* 3066 * Scan the list of registered ioctls, looking for handlers. 3067 */ 3068 ACPI_LOCK(acpi); 3069 if (acpi_ioctl_hooks_initted) 3070 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 3071 if (hp->cmd == ap->a_cmd) 3072 break; 3073 } 3074 ACPI_UNLOCK(acpi); 3075 if (hp) 3076 return (hp->fn(ap->a_cmd, ap->a_data, hp->arg)); 3077 3078 /* 3079 * Core ioctls are not permitted for non-writable user. 3080 * Currently, other ioctls just fetch information. 3081 * Not changing system behavior. 3082 */ 3083 if ((ap->a_fflag & FWRITE) == 0) 3084 return (EPERM); 3085 3086 /* Core system ioctls. */ 3087 switch (ap->a_cmd) { 3088 case ACPIIO_REQSLPSTATE: 3089 state = *(int *)ap->a_data; 3090 if (state != ACPI_STATE_S5) 3091 error = acpi_ReqSleepState(sc, state); 3092 else { 3093 kprintf("power off via acpi ioctl not supported\n"); 3094 error = ENXIO; 3095 } 3096 break; 3097 case ACPIIO_ACKSLPSTATE: 3098 error = EOPNOTSUPP; 3099 #if 0 /* notyet */ 3100 error = *(int *)ap->a_data; 3101 error = acpi_AckSleepState(sc->acpi_clone, error); 3102 #endif 3103 break; 3104 case ACPIIO_SETSLPSTATE: /* DEPRECATED */ 3105 error = EINVAL; 3106 state = *(int *)ap->a_data; 3107 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 3108 if (ACPI_SUCCESS(acpi_SetSleepState(sc, state))) 3109 error = 0; 3110 break; 3111 default: 3112 error = ENXIO; 3113 break; 3114 } 3115 return (error); 3116 } 3117 3118 static int 3119 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3120 { 3121 int error; 3122 struct sbuf sb; 3123 UINT8 state, TypeA, TypeB; 3124 3125 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND); 3126 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX + 1; state++) 3127 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) 3128 sbuf_printf(&sb, "S%d ", state); 3129 sbuf_trim(&sb); 3130 sbuf_finish(&sb); 3131 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 3132 sbuf_delete(&sb); 3133 return (error); 3134 } 3135 3136 static int 3137 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3138 { 3139 char sleep_state[10]; 3140 int error; 3141 u_int new_state, old_state; 3142 3143 old_state = *(u_int *)oidp->oid_arg1; 3144 if (old_state > ACPI_S_STATES_MAX + 1) 3145 strlcpy(sleep_state, "unknown", sizeof(sleep_state)); 3146 else 3147 strlcpy(sleep_state, sleep_state_names[old_state], sizeof(sleep_state)); 3148 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 3149 if (error == 0 && req->newptr != NULL) { 3150 new_state = ACPI_STATE_S0; 3151 for (; new_state <= ACPI_S_STATES_MAX + 1; new_state++) 3152 if (strcmp(sleep_state, sleep_state_names[new_state]) == 0) 3153 break; 3154 if (new_state <= ACPI_S_STATES_MAX + 1) { 3155 if (new_state != old_state) 3156 *(u_int *)oidp->oid_arg1 = new_state; 3157 } else 3158 error = EINVAL; 3159 } 3160 3161 return (error); 3162 } 3163 3164 /* Inform devctl(4) when we receive a Notify. */ 3165 void 3166 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 3167 { 3168 char notify_buf[16]; 3169 ACPI_BUFFER handle_buf; 3170 ACPI_STATUS status; 3171 3172 if (subsystem == NULL) 3173 return; 3174 3175 handle_buf.Pointer = NULL; 3176 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 3177 status = AcpiNsHandleToPathname(h, &handle_buf); 3178 if (ACPI_FAILURE(status)) 3179 return; 3180 ksnprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 3181 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 3182 AcpiOsFree(handle_buf.Pointer); 3183 } 3184 3185 #ifdef ACPI_DEBUG 3186 /* 3187 * Support for parsing debug options from the kernel environment. 3188 * 3189 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 3190 * by specifying the names of the bits in the debug.acpi.layer and 3191 * debug.acpi.level environment variables. Bits may be unset by 3192 * prefixing the bit name with !. 3193 */ 3194 struct debugtag 3195 { 3196 char *name; 3197 UINT32 value; 3198 }; 3199 3200 static struct debugtag dbg_layer[] = { 3201 {"ACPI_UTILITIES", ACPI_UTILITIES}, 3202 {"ACPI_HARDWARE", ACPI_HARDWARE}, 3203 {"ACPI_EVENTS", ACPI_EVENTS}, 3204 {"ACPI_TABLES", ACPI_TABLES}, 3205 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 3206 {"ACPI_PARSER", ACPI_PARSER}, 3207 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 3208 {"ACPI_EXECUTER", ACPI_EXECUTER}, 3209 {"ACPI_RESOURCES", ACPI_RESOURCES}, 3210 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 3211 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 3212 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 3213 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 3214 3215 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 3216 {"ACPI_BATTERY", ACPI_BATTERY}, 3217 {"ACPI_BUS", ACPI_BUS}, 3218 {"ACPI_BUTTON", ACPI_BUTTON}, 3219 {"ACPI_EC", ACPI_EC}, 3220 {"ACPI_FAN", ACPI_FAN}, 3221 {"ACPI_POWERRES", ACPI_POWERRES}, 3222 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 3223 {"ACPI_THERMAL", ACPI_THERMAL}, 3224 {"ACPI_TIMER", ACPI_TIMER}, 3225 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 3226 {NULL, 0} 3227 }; 3228 3229 static struct debugtag dbg_level[] = { 3230 {"ACPI_LV_INIT", ACPI_LV_INIT}, 3231 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 3232 {"ACPI_LV_INFO", ACPI_LV_INFO}, 3233 {"ACPI_LV_REPAIR", ACPI_LV_REPAIR}, 3234 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 3235 3236 /* Trace verbosity level 1 [Standard Trace Level] */ 3237 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 3238 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 3239 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 3240 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 3241 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 3242 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 3243 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 3244 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 3245 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 3246 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 3247 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 3248 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 3249 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 3250 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 3251 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 3252 3253 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 3254 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 3255 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 3256 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 3257 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 3258 {"ACPI_LV_ALL", ACPI_LV_ALL}, 3259 3260 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 3261 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 3262 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 3263 {"ACPI_LV_IO", ACPI_LV_IO}, 3264 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 3265 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 3266 3267 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 3268 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 3269 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 3270 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 3271 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 3272 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 3273 {NULL, 0} 3274 }; 3275 3276 static void 3277 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 3278 { 3279 char *ep; 3280 int i, l; 3281 int set; 3282 3283 while (*cp) { 3284 if (isspace(*cp)) { 3285 cp++; 3286 continue; 3287 } 3288 ep = cp; 3289 while (*ep && !isspace(*ep)) 3290 ep++; 3291 if (*cp == '!') { 3292 set = 0; 3293 cp++; 3294 if (cp == ep) 3295 continue; 3296 } else { 3297 set = 1; 3298 } 3299 l = ep - cp; 3300 for (i = 0; tag[i].name != NULL; i++) { 3301 if (!strncmp(cp, tag[i].name, l)) { 3302 if (set) 3303 *flag |= tag[i].value; 3304 else 3305 *flag &= ~tag[i].value; 3306 } 3307 } 3308 cp = ep; 3309 } 3310 } 3311 3312 static void 3313 acpi_set_debugging(void *junk) 3314 { 3315 char *layer, *level; 3316 3317 if (cold) { 3318 AcpiDbgLayer = 0; 3319 AcpiDbgLevel = 0; 3320 } 3321 3322 layer = kgetenv("debug.acpi.layer"); 3323 level = kgetenv("debug.acpi.level"); 3324 if (layer == NULL && level == NULL) 3325 return; 3326 3327 kprintf("ACPI set debug"); 3328 if (layer != NULL) { 3329 if (strcmp("NONE", layer) != 0) 3330 kprintf(" layer '%s'", layer); 3331 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer); 3332 kfreeenv(layer); 3333 } 3334 if (level != NULL) { 3335 if (strcmp("NONE", level) != 0) 3336 kprintf(" level '%s'", level); 3337 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel); 3338 kfreeenv(level); 3339 } 3340 kprintf("\n"); 3341 } 3342 3343 SYSINIT(acpi_debugging, SI_BOOT1_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 3344 NULL); 3345 3346 static int 3347 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 3348 { 3349 int error, *dbg; 3350 struct debugtag *tag; 3351 struct sbuf sb; 3352 3353 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 3354 return (ENOMEM); 3355 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 3356 tag = &dbg_layer[0]; 3357 dbg = &AcpiDbgLayer; 3358 } else { 3359 tag = &dbg_level[0]; 3360 dbg = &AcpiDbgLevel; 3361 } 3362 3363 /* Get old values if this is a get request. */ 3364 ACPI_SERIAL_BEGIN(acpi); 3365 if (*dbg == 0) { 3366 sbuf_cpy(&sb, "NONE"); 3367 } else if (req->newptr == NULL) { 3368 for (; tag->name != NULL; tag++) { 3369 if ((*dbg & tag->value) == tag->value) 3370 sbuf_printf(&sb, "%s ", tag->name); 3371 } 3372 } 3373 sbuf_trim(&sb); 3374 sbuf_finish(&sb); 3375 3376 /* Copy out the old values to the user. */ 3377 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb)); 3378 sbuf_delete(&sb); 3379 3380 /* If the user is setting a string, parse it. */ 3381 if (error == 0 && req->newptr != NULL) { 3382 *dbg = 0; 3383 ksetenv((char *)oidp->oid_arg1, (char *)req->newptr); 3384 acpi_set_debugging(NULL); 3385 } 3386 ACPI_SERIAL_END(acpi); 3387 3388 return (error); 3389 } 3390 3391 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 3392 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 3393 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 3394 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 3395 #endif /* ACPI_DEBUG */ 3396 3397 static int 3398 acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS) 3399 { 3400 int error; 3401 int old; 3402 3403 old = acpi_debug_objects; 3404 error = sysctl_handle_int(oidp, &acpi_debug_objects, 0, req); 3405 if (error != 0 || req->newptr == NULL) 3406 return (error); 3407 if (old == acpi_debug_objects || (old && acpi_debug_objects)) 3408 return (0); 3409 3410 ACPI_SERIAL_BEGIN(acpi); 3411 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE; 3412 ACPI_SERIAL_END(acpi); 3413 3414 return (0); 3415 } 3416 3417 static int 3418 acpi_pm_func(u_long cmd, void *arg, ...) 3419 { 3420 int state, acpi_state; 3421 int error; 3422 struct acpi_softc *sc; 3423 va_list ap; 3424 3425 error = 0; 3426 switch (cmd) { 3427 case POWER_CMD_SUSPEND: 3428 sc = (struct acpi_softc *)arg; 3429 if (sc == NULL) { 3430 error = EINVAL; 3431 goto out; 3432 } 3433 3434 va_start(ap, arg); 3435 state = va_arg(ap, int); 3436 va_end(ap); 3437 3438 switch (state) { 3439 case POWER_SLEEP_STATE_STANDBY: 3440 acpi_state = sc->acpi_standby_sx; 3441 break; 3442 case POWER_SLEEP_STATE_SUSPEND: 3443 acpi_state = sc->acpi_suspend_sx; 3444 break; 3445 case POWER_SLEEP_STATE_HIBERNATE: 3446 acpi_state = ACPI_STATE_S4; 3447 break; 3448 default: 3449 error = EINVAL; 3450 goto out; 3451 } 3452 3453 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state))) 3454 error = ENXIO; 3455 break; 3456 default: 3457 error = EINVAL; 3458 goto out; 3459 } 3460 3461 out: 3462 return (error); 3463 } 3464 3465 static void 3466 acpi_pm_register(void *arg) 3467 { 3468 if (!cold || resource_disabled("acpi", 0)) 3469 return; 3470 3471 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 3472 } 3473 3474 SYSINIT(power, SI_BOOT2_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 3475