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