1 /*- 2 * Copyright (c) 2000 Takanori Watanabe <takawata@jp.kfreebsd.org> 3 * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.kfreebsd.org> 4 * Copyright (c) 2000, 2001 Michael Smith 5 * Copyright (c) 2000 BSDi 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: src/sys/dev/acpica/acpi.c,v 1.243.2.4.4.1 2009/04/15 03:14:26 kensmith Exp $ 30 */ 31 32 #include "opt_acpi.h" 33 #include <sys/param.h> 34 #include <sys/kernel.h> 35 #include <sys/proc.h> 36 #include <sys/fcntl.h> 37 #include <sys/malloc.h> 38 #include <sys/module.h> 39 #include <sys/bus.h> 40 #include <sys/conf.h> 41 #include <sys/reboot.h> 42 #include <sys/sysctl.h> 43 #include <sys/ctype.h> 44 #include <sys/linker.h> 45 #include <sys/power.h> 46 #include <sys/sbuf.h> 47 #include <sys/device.h> 48 #include <sys/spinlock.h> 49 #include <sys/spinlock2.h> 50 #include <sys/uuid.h> 51 52 #include <sys/rman.h> 53 #include <bus/isa/isavar.h> 54 #include <bus/isa/pnpvar.h> 55 56 #include "acpi.h" 57 #include <dev/acpica/acpivar.h> 58 #include <dev/acpica/acpiio.h> 59 #include "achware.h" 60 #include "acnamesp.h" 61 #include "acglobal.h" 62 63 #include "pci_if.h" 64 #include <bus/pci/pci_cfgreg.h> 65 #include <bus/pci/pcivar.h> 66 #include <bus/pci/pci_private.h> 67 68 #include <vm/vm_param.h> 69 70 MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 71 72 /* Hooks for the ACPICA debugging infrastructure */ 73 #define _COMPONENT ACPI_BUS 74 ACPI_MODULE_NAME("ACPI") 75 76 static d_open_t acpiopen; 77 static d_close_t acpiclose; 78 static d_ioctl_t acpiioctl; 79 80 static struct dev_ops acpi_ops = { 81 { "acpi", 0, 0 }, 82 .d_open = acpiopen, 83 .d_close = acpiclose, 84 .d_ioctl = acpiioctl 85 }; 86 87 struct acpi_interface { 88 ACPI_STRING *data; 89 int num; 90 }; 91 92 /* Global mutex for locking access to the ACPI subsystem. */ 93 struct lock acpi_lock; 94 95 /* Bitmap of device quirks. */ 96 int acpi_quirks; 97 98 static int acpi_modevent(struct module *mod, int event, void *junk); 99 static void acpi_identify(driver_t *driver, device_t parent); 100 static int acpi_probe(device_t dev); 101 static int acpi_attach(device_t dev); 102 static int acpi_suspend(device_t dev); 103 static int acpi_resume(device_t dev); 104 static int acpi_shutdown(device_t dev); 105 static device_t acpi_add_child(device_t bus, device_t parent, int order, const char *name, 106 int unit); 107 static int acpi_print_child(device_t bus, device_t child); 108 static void acpi_probe_nomatch(device_t bus, device_t child); 109 static void acpi_driver_added(device_t dev, driver_t *driver); 110 static int acpi_read_ivar(device_t dev, device_t child, int index, 111 uintptr_t *result); 112 static int acpi_write_ivar(device_t dev, device_t child, int index, 113 uintptr_t value); 114 static struct resource_list *acpi_get_rlist(device_t dev, device_t child); 115 static int acpi_sysres_alloc(device_t dev); 116 static struct resource *acpi_alloc_resource(device_t bus, device_t child, 117 int type, int *rid, u_long start, u_long end, 118 u_long count, u_int flags, int cpuid); 119 static int acpi_release_resource(device_t bus, device_t child, int type, 120 int rid, struct resource *r); 121 static void acpi_delete_resource(device_t bus, device_t child, int type, 122 int rid); 123 static uint32_t acpi_isa_get_logicalid(device_t dev); 124 static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count); 125 static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids); 126 static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev, 127 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters, 128 ACPI_BUFFER *ret); 129 static int acpi_device_pwr_for_sleep(device_t bus, device_t dev, 130 int *dstate); 131 static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, 132 void *context, void **retval); 133 static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev, 134 int max_depth, acpi_scan_cb_t user_fn, void *arg); 135 static int acpi_set_powerstate_method(device_t bus, device_t child, 136 int state); 137 static int acpi_isa_pnp_probe(device_t bus, device_t child, 138 struct isa_pnp_id *ids); 139 static void acpi_probe_children(device_t bus); 140 static void acpi_probe_order(ACPI_HANDLE handle, int *order); 141 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, 142 void *context, void **status); 143 static ACPI_STATUS acpi_EnterSleepState(struct acpi_softc *sc, int state); 144 static void acpi_shutdown_final(void *arg, int howto); 145 static void acpi_enable_fixed_events(struct acpi_softc *sc); 146 static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate); 147 static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate); 148 static int acpi_wake_prep_walk(int sstate); 149 static int acpi_wake_sysctl_walk(device_t dev); 150 #ifdef notyet 151 static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS); 152 #endif 153 static void acpi_system_eventhandler_sleep(void *arg, int state); 154 static void acpi_system_eventhandler_wakeup(void *arg, int state); 155 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 156 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 157 static int acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS); 158 static int acpi_pm_func(u_long cmd, void *arg, ...); 159 static int acpi_child_location_str_method(device_t acdev, device_t child, 160 char *buf, size_t buflen); 161 static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child, 162 char *buf, size_t buflen); 163 static void acpi_enable_pcie(void); 164 static void acpi_reset_interfaces(device_t dev); 165 166 static device_method_t acpi_methods[] = { 167 /* Device interface */ 168 DEVMETHOD(device_identify, acpi_identify), 169 DEVMETHOD(device_probe, acpi_probe), 170 DEVMETHOD(device_attach, acpi_attach), 171 DEVMETHOD(device_shutdown, acpi_shutdown), 172 DEVMETHOD(device_detach, bus_generic_detach), 173 DEVMETHOD(device_suspend, acpi_suspend), 174 DEVMETHOD(device_resume, acpi_resume), 175 176 /* Bus interface */ 177 DEVMETHOD(bus_add_child, acpi_add_child), 178 DEVMETHOD(bus_print_child, acpi_print_child), 179 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch), 180 DEVMETHOD(bus_driver_added, acpi_driver_added), 181 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 182 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 183 DEVMETHOD(bus_get_resource_list, acpi_get_rlist), 184 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 185 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 186 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 187 DEVMETHOD(bus_release_resource, acpi_release_resource), 188 DEVMETHOD(bus_delete_resource, acpi_delete_resource), 189 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method), 190 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method), 191 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 192 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 193 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 194 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 195 196 /* ACPI bus */ 197 DEVMETHOD(acpi_id_probe, acpi_device_id_probe), 198 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj), 199 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep), 200 DEVMETHOD(acpi_scan_children, acpi_device_scan_children), 201 202 /* PCI emulation */ 203 DEVMETHOD(pci_set_powerstate, acpi_set_powerstate_method), 204 205 /* ISA emulation */ 206 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 207 208 DEVMETHOD_END 209 }; 210 211 static driver_t acpi_driver = { 212 "acpi", 213 acpi_methods, 214 sizeof(struct acpi_softc), 215 }; 216 217 static devclass_t acpi_devclass; 218 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, NULL); 219 MODULE_VERSION(acpi, 1); 220 221 ACPI_SERIAL_DECL(acpi, "ACPI serializer") 222 223 /* Local pools for managing system resources for ACPI child devices. */ 224 static struct rman acpi_rman_io, acpi_rman_mem; 225 226 #define ACPI_MINIMUM_AWAKETIME 5 227 228 static const char* sleep_state_names[] = { 229 "S0", "S1", "S2", "S3", "S4", "S5", "NONE"}; 230 231 SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging"); 232 static char acpi_ca_version[12]; 233 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, 234 acpi_ca_version, 0, "Version of Intel ACPICA"); 235 236 /* 237 * Allow overriding _OSI methods. 238 */ 239 static char acpi_install_interface[256]; 240 TUNABLE_STR("hw.acpi.install_interface", acpi_install_interface, 241 sizeof(acpi_install_interface)); 242 static char acpi_remove_interface[256]; 243 TUNABLE_STR("hw.acpi.remove_interface", acpi_remove_interface, 244 sizeof(acpi_remove_interface)); 245 246 /* 247 * Use this tunable to disable the control method auto-serialization 248 * mechanism that was added in 20140214 and superseded the previous 249 * AcpiGbl_SerializeAllMethods global. 250 */ 251 static int acpi_auto_serialize_methods = 1; 252 TUNABLE_INT("hw.acpi.auto_serialize_methods", &acpi_auto_serialize_methods); 253 254 /* Allow users to dump Debug objects without ACPI debugger. */ 255 static int acpi_debug_objects; 256 TUNABLE_INT("debug.acpi.enable_debug_objects", &acpi_debug_objects); 257 SYSCTL_PROC(_debug_acpi, OID_AUTO, enable_debug_objects, 258 CTLFLAG_RW | CTLTYPE_INT, NULL, 0, acpi_debug_objects_sysctl, "I", 259 "Enable Debug objects"); 260 261 /* Allow the interpreter to ignore common mistakes in BIOS. */ 262 static int acpi_interpreter_slack = 1; 263 TUNABLE_INT("debug.acpi.interpreter_slack", &acpi_interpreter_slack); 264 SYSCTL_INT(_debug_acpi, OID_AUTO, interpreter_slack, CTLFLAG_RD, 265 &acpi_interpreter_slack, 1, "Turn on interpreter slack mode."); 266 267 /* Power devices off and on in suspend and resume. XXX Remove once tested. */ 268 static int acpi_do_powerstate = 1; 269 TUNABLE_INT("debug.acpi.do_powerstate", &acpi_do_powerstate); 270 SYSCTL_INT(_debug_acpi, OID_AUTO, do_powerstate, CTLFLAG_RW, 271 &acpi_do_powerstate, 1, "Turn off devices when suspending."); 272 273 /* Allow users to override quirks. */ 274 TUNABLE_INT("debug.acpi.quirks", &acpi_quirks); 275 276 static int acpi_susp_bounce; 277 SYSCTL_INT(_debug_acpi, OID_AUTO, suspend_bounce, CTLFLAG_RW, 278 &acpi_susp_bounce, 0, "Don't actually suspend, just test devices."); 279 280 /* 281 * ACPI can only be loaded as a module by the loader; activating it after 282 * system bootstrap time is not useful, and can be fatal to the system. 283 * It also cannot be unloaded, since the entire system bus heirarchy hangs 284 * off it. 285 */ 286 static int 287 acpi_modevent(struct module *mod, int event, void *junk) 288 { 289 switch (event) { 290 case MOD_LOAD: 291 if (!cold) { 292 kprintf("The ACPI driver cannot be loaded after boot.\n"); 293 return (EPERM); 294 } 295 break; 296 case MOD_UNLOAD: 297 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 298 return (EBUSY); 299 break; 300 default: 301 break; 302 } 303 return (0); 304 } 305 306 /* 307 * Perform early initialization. 308 */ 309 ACPI_STATUS 310 acpi_Startup(void) 311 { 312 static int started = 0; 313 ACPI_STATUS status; 314 int val; 315 316 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 317 318 /* Only run the startup code once. The MADT driver also calls this. */ 319 if (started) 320 return_VALUE (AE_OK); 321 started = 1; 322 323 /* 324 * Pre-allocate space for RSDT/XSDT and DSDT tables and allow resizing 325 * if more tables exist. 326 */ 327 if (ACPI_FAILURE(status = AcpiInitializeTables(NULL, 2, TRUE))) { 328 kprintf("ACPI: Table initialisation failed: %s\n", 329 AcpiFormatException(status)); 330 return_VALUE (status); 331 } 332 333 /* Set up any quirks we have for this system. */ 334 if (acpi_quirks == ACPI_Q_OK) 335 acpi_table_quirks(&acpi_quirks); 336 337 /* If the user manually set the disabled hint to 0, force-enable ACPI. */ 338 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0) 339 acpi_quirks &= ~ACPI_Q_BROKEN; 340 if (acpi_quirks & ACPI_Q_BROKEN) { 341 kprintf("ACPI disabled by blacklist. Contact your BIOS vendor.\n"); 342 status = AE_SUPPORT; 343 } 344 345 return_VALUE (status); 346 } 347 348 /* 349 * Detect ACPI, perform early initialisation 350 */ 351 static void 352 acpi_identify(driver_t *driver, device_t parent) 353 { 354 device_t child; 355 356 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 357 358 if (!cold) 359 return_VOID; 360 361 /* Check that we haven't been disabled with a hint. */ 362 if (resource_disabled("acpi", 0)) 363 return_VOID; 364 365 /* Make sure we're not being doubly invoked. */ 366 if (device_find_child(parent, "acpi", 0) != NULL) 367 return_VOID; 368 369 ksnprintf(acpi_ca_version, sizeof(acpi_ca_version), "%x", ACPI_CA_VERSION); 370 371 /* Initialize root tables. */ 372 if (ACPI_FAILURE(acpi_Startup())) { 373 kprintf("ACPI: Try disabling either ACPI or apic support.\n"); 374 return_VOID; 375 } 376 377 /* Attach the actual ACPI device. */ 378 if ((child = BUS_ADD_CHILD(parent, parent, 10, "acpi", 0)) == NULL) { 379 device_printf(parent, "device_identify failed\n"); 380 return_VOID; 381 } 382 } 383 384 /* 385 * Fetch some descriptive data from ACPI to put in our attach message. 386 */ 387 static int 388 acpi_probe(device_t dev) 389 { 390 ACPI_TABLE_RSDP *rsdp; 391 ACPI_TABLE_HEADER *rsdt; 392 ACPI_PHYSICAL_ADDRESS paddr; 393 char buf[ACPI_OEM_ID_SIZE + ACPI_OEM_TABLE_ID_SIZE + 2]; 394 struct sbuf sb; 395 396 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 397 398 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 399 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 400 device_printf(dev, "probe failed, other PM system enabled.\n"); 401 return_VALUE (ENXIO); 402 } 403 404 if ((paddr = AcpiOsGetRootPointer()) == 0 || 405 (rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP))) == NULL) 406 return_VALUE (ENXIO); 407 if (rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress != 0) 408 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress; 409 else 410 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress; 411 AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP)); 412 413 if ((rsdt = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER))) == NULL) 414 return_VALUE (ENXIO); 415 sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN); 416 sbuf_bcat(&sb, rsdt->OemId, ACPI_OEM_ID_SIZE); 417 sbuf_trim(&sb); 418 sbuf_putc(&sb, ' '); 419 sbuf_bcat(&sb, rsdt->OemTableId, ACPI_OEM_TABLE_ID_SIZE); 420 sbuf_trim(&sb); 421 sbuf_finish(&sb); 422 device_set_desc_copy(dev, sbuf_data(&sb)); 423 sbuf_delete(&sb); 424 AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER)); 425 426 return_VALUE (0); 427 } 428 429 static int 430 acpi_attach(device_t dev) 431 { 432 struct acpi_softc *sc; 433 ACPI_STATUS status; 434 int error, state; 435 UINT32 flags; 436 UINT8 TypeA, TypeB; 437 char *env; 438 439 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 440 441 sc = device_get_softc(dev); 442 sc->acpi_dev = dev; 443 callout_init(&sc->susp_force_to); 444 445 if ((error = acpi_task_thread_init())) { 446 device_printf(dev, "Could not start task thread.\n"); 447 goto out; 448 } 449 450 error = ENXIO; 451 452 /* Initialize resource manager. */ 453 acpi_rman_io.rm_type = RMAN_ARRAY; 454 acpi_rman_io.rm_start = 0; 455 acpi_rman_io.rm_end = 0xffff; 456 acpi_rman_io.rm_descr = "ACPI I/O ports"; 457 if (rman_init(&acpi_rman_io, -1) != 0) 458 panic("acpi rman_init IO ports failed"); 459 acpi_rman_mem.rm_type = RMAN_ARRAY; 460 acpi_rman_mem.rm_start = 0; 461 acpi_rman_mem.rm_end = ~0ul; 462 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses"; 463 if (rman_init(&acpi_rman_mem, -1) != 0) 464 panic("acpi rman_init memory failed"); 465 466 /* Initialise the ACPI mutex */ 467 ACPI_LOCK_INIT(acpi, "acpi"); 468 ACPI_SERIAL_INIT(acpi); 469 470 /* 471 * Set the globals from our tunables. This is needed because ACPICA 472 * uses UINT8 for some values and we have no tunable_byte. 473 */ 474 AcpiGbl_AutoSerializeMethods = acpi_auto_serialize_methods ? TRUE : FALSE; 475 AcpiGbl_EnableInterpreterSlack = acpi_interpreter_slack ? TRUE : FALSE; 476 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE; 477 478 #ifndef ACPI_DEBUG 479 /* 480 * Disable Debug Object output. 481 */ 482 AcpiDbgLevel &= ~ACPI_LV_DEBUG_OBJECT; 483 #endif 484 485 /* Start up the ACPICA subsystem. */ 486 status = AcpiInitializeSubsystem(); 487 if (ACPI_FAILURE(status)) { 488 device_printf(dev, "Could not initialize Subsystem: %s\n", 489 AcpiFormatException(status)); 490 goto out; 491 } 492 493 /* Override OS interfaces if the user requested. */ 494 acpi_reset_interfaces(dev); 495 496 /* Load ACPI name space. */ 497 status = AcpiLoadTables(); 498 if (ACPI_FAILURE(status)) { 499 device_printf(dev, "Could not load Namespace: %s\n", 500 AcpiFormatException(status)); 501 goto out; 502 } 503 504 /* Handle MCFG table if present. */ 505 acpi_enable_pcie(); 506 507 /* 508 * Note that some systems (specifically, those with namespace evaluation 509 * issues that require the avoidance of parts of the namespace) must 510 * avoid running _INI and _STA on everything, as well as dodging the final 511 * object init pass. 512 * 513 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 514 * 515 * XXX We should arrange for the object init pass after we have attached 516 * all our child devices, but on many systems it works here. 517 */ 518 flags = 0; 519 if (ktestenv("debug.acpi.avoid")) 520 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 521 522 /* Bring the hardware and basic handlers online. */ 523 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 524 device_printf(dev, "Could not enable ACPI: %s\n", 525 AcpiFormatException(status)); 526 goto out; 527 } 528 529 /* 530 * Fix up the interrupt timer after enabling ACPI, so that the 531 * interrupt cputimer that choked by ACPI power management could 532 * be resurrected before probing various devices. 533 */ 534 DELAY(5000); 535 cputimer_intr_pmfixup(); 536 537 /* 538 * Call the ECDT probe function to provide EC functionality before 539 * the namespace has been evaluated. 540 * 541 * XXX This happens before the sysresource devices have been probed and 542 * attached so its resources come from nexus0. In practice, this isn't 543 * a problem but should be addressed eventually. 544 */ 545 acpi_ec_ecdt_probe(dev); 546 547 /* Bring device objects and regions online. */ 548 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 549 device_printf(dev, "Could not initialize ACPI objects: %s\n", 550 AcpiFormatException(status)); 551 goto out; 552 } 553 554 /* 555 * Setup our sysctl tree. 556 * 557 * XXX: This doesn't check to make sure that none of these fail. 558 */ 559 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 560 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 561 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 562 device_get_name(dev), CTLFLAG_RD, 0, ""); 563 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 564 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 565 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 566 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 567 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 568 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 569 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 570 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 571 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 572 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 573 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 574 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 575 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 576 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 577 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 578 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 579 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 580 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 581 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 582 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0, 583 "sleep delay"); 584 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 585 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode"); 586 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 587 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode"); 588 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 589 OID_AUTO, "disable_on_reboot", CTLFLAG_RW, 590 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system"); 591 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 592 OID_AUTO, "handle_reboot", CTLFLAG_RW, 593 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot"); 594 595 /* 596 * Default to 1 second before sleeping to give some machines time to 597 * stabilize. 598 */ 599 sc->acpi_sleep_delay = 1; 600 if (bootverbose) 601 sc->acpi_verbose = 1; 602 if ((env = kgetenv("hw.acpi.verbose")) != NULL) { 603 if (strcmp(env, "0") != 0) 604 sc->acpi_verbose = 1; 605 kfreeenv(env); 606 } 607 608 /* Only enable reboot by default if the FADT says it is available. */ 609 if (AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) 610 sc->acpi_handle_reboot = 1; 611 612 /* Only enable S4BIOS by default if the FACS says it is available. */ 613 if (AcpiGbl_FACS->Flags & ACPI_FACS_S4_BIOS_PRESENT) 614 sc->acpi_s4bios = 1; 615 616 /* 617 * Dispatch the default sleep state to devices. The lid switch is set 618 * to NONE by default to avoid surprising users. 619 */ 620 sc->acpi_power_button_sx = ACPI_STATE_S5; 621 sc->acpi_lid_switch_sx = ACPI_S_STATES_MAX + 1; 622 sc->acpi_standby_sx = ACPI_STATE_S1; 623 sc->acpi_suspend_sx = ACPI_STATE_S3; 624 625 /* Pick the first valid sleep state for the sleep button default. */ 626 sc->acpi_sleep_button_sx = ACPI_S_STATES_MAX + 1; 627 for (state = ACPI_STATE_S1; state <= ACPI_STATE_S4; state++) 628 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) { 629 sc->acpi_sleep_button_sx = state; 630 break; 631 } 632 633 acpi_enable_fixed_events(sc); 634 635 /* 636 * Scan the namespace and attach/initialise children. 637 */ 638 639 /* Register our shutdown handler. */ 640 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 641 SHUTDOWN_PRI_LAST); 642 643 /* 644 * Register our acpi event handlers. 645 * XXX should be configurable eg. via userland policy manager. 646 */ 647 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 648 sc, ACPI_EVENT_PRI_LAST); 649 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 650 sc, ACPI_EVENT_PRI_LAST); 651 652 /* Flag our initial states. */ 653 sc->acpi_enabled = 1; 654 sc->acpi_sstate = ACPI_STATE_S0; 655 sc->acpi_sleep_disabled = 0; 656 /* Create the control device */ 657 sc->acpi_dev_t = make_dev(&acpi_ops, 0, UID_ROOT, GID_WHEEL, 0644, 658 "acpi"); 659 sc->acpi_dev_t->si_drv1 = sc; 660 661 if ((error = acpi_machdep_init(dev))) 662 goto out; 663 664 /* Register ACPI again to pass the correct argument of pm_func. */ 665 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 666 667 if (!acpi_disabled("bus")) 668 acpi_probe_children(dev); 669 670 /* Update all GPEs and enable runtime GPEs. */ 671 status = AcpiUpdateAllGpes(); 672 if (ACPI_FAILURE(status)) { 673 device_printf(dev, "Could not update all GPEs: %s\n", 674 AcpiFormatException(status)); 675 } 676 677 /* Allow sleep request after a while. */ 678 /* timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); */ 679 680 error = 0; 681 682 out: 683 cputimer_intr_pmfixup(); 684 acpi_task_thread_schedule(); 685 return_VALUE (error); 686 } 687 688 static int 689 acpi_suspend(device_t dev) 690 { 691 device_t child, *devlist; 692 int error, i, numdevs, pstate; 693 694 /* First give child devices a chance to suspend. */ 695 error = bus_generic_suspend(dev); 696 if (error) 697 return (error); 698 699 /* 700 * Now, set them into the appropriate power state, usually D3. If the 701 * device has an _SxD method for the next sleep state, use that power 702 * state instead. 703 */ 704 device_get_children(dev, &devlist, &numdevs); 705 for (i = 0; i < numdevs; i++) { 706 /* If the device is not attached, we've powered it down elsewhere. */ 707 child = devlist[i]; 708 if (!device_is_attached(child)) 709 continue; 710 711 /* 712 * Default to D3 for all sleep states. The _SxD method is optional 713 * so set the powerstate even if it's absent. 714 */ 715 pstate = PCI_POWERSTATE_D3; 716 error = acpi_device_pwr_for_sleep(device_get_parent(child), 717 child, &pstate); 718 if ((error == 0 || error == ESRCH) && acpi_do_powerstate) 719 pci_set_powerstate(child, pstate); 720 } 721 kfree(devlist, M_TEMP); 722 error = 0; 723 724 return (error); 725 } 726 727 static int 728 acpi_resume(device_t dev) 729 { 730 ACPI_HANDLE handle; 731 int i, numdevs; 732 device_t child, *devlist; 733 734 /* 735 * Put all devices in D0 before resuming them. Call _S0D on each one 736 * since some systems expect this. 737 */ 738 device_get_children(dev, &devlist, &numdevs); 739 for (i = 0; i < numdevs; i++) { 740 child = devlist[i]; 741 handle = acpi_get_handle(child); 742 if (handle) 743 AcpiEvaluateObject(handle, "_S0D", NULL, NULL); 744 if (device_is_attached(child) && acpi_do_powerstate) 745 pci_set_powerstate(child, PCI_POWERSTATE_D0); 746 } 747 kfree(devlist, M_TEMP); 748 749 return (bus_generic_resume(dev)); 750 } 751 752 static int 753 acpi_shutdown(device_t dev) 754 { 755 /* Allow children to shutdown first. */ 756 bus_generic_shutdown(dev); 757 758 /* 759 * Enable any GPEs that are able to power-on the system (i.e., RTC). 760 * Also, disable any that are not valid for this state (most). 761 */ 762 acpi_wake_prep_walk(ACPI_STATE_S5); 763 764 return (0); 765 } 766 767 /* 768 * Handle a new device being added 769 */ 770 static device_t 771 acpi_add_child(device_t bus, device_t parent, int order, const char *name, int unit) 772 { 773 struct acpi_device *ad; 774 device_t child; 775 776 if ((ad = kmalloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 777 return (NULL); 778 779 resource_list_init(&ad->ad_rl); 780 child = device_add_child_ordered(parent, order, name, unit); 781 if (child != NULL) 782 device_set_ivars(child, ad); 783 else 784 kfree(ad, M_ACPIDEV); 785 return (child); 786 } 787 788 static int 789 acpi_print_child(device_t bus, device_t child) 790 { 791 struct acpi_device *adev = device_get_ivars(child); 792 struct resource_list *rl = &adev->ad_rl; 793 int retval = 0; 794 795 retval += bus_print_child_header(bus, child); 796 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 797 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 798 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 799 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 800 if (device_get_flags(child)) 801 retval += kprintf(" flags %#x", device_get_flags(child)); 802 retval += bus_print_child_footer(bus, child); 803 804 return (retval); 805 } 806 807 /* 808 * If this device is an ACPI child but no one claimed it, attempt 809 * to power it off. We'll power it back up when a driver is added. 810 * 811 * XXX Disabled for now since many necessary devices (like fdc and 812 * ATA) don't claim the devices we created for them but still expect 813 * them to be powered up. 814 */ 815 static void 816 acpi_probe_nomatch(device_t bus, device_t child) 817 { 818 819 /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */ 820 } 821 822 /* 823 * If a new driver has a chance to probe a child, first power it up. 824 * 825 * XXX Disabled for now (see acpi_probe_nomatch for details). 826 */ 827 static void 828 acpi_driver_added(device_t dev, driver_t *driver) 829 { 830 device_t child, *devlist; 831 int i, numdevs; 832 833 DEVICE_IDENTIFY(driver, dev); 834 device_get_children(dev, &devlist, &numdevs); 835 for (i = 0; i < numdevs; i++) { 836 child = devlist[i]; 837 if (device_get_state(child) == DS_NOTPRESENT) { 838 /* pci_set_powerstate(child, PCI_POWERSTATE_D0); */ 839 if (device_probe_and_attach(child) != 0) 840 ; /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */ 841 } 842 } 843 kfree(devlist, M_TEMP); 844 } 845 846 /* Location hint for devctl(8) */ 847 static int 848 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf, 849 size_t buflen) 850 { 851 struct acpi_device *dinfo = device_get_ivars(child); 852 853 if (dinfo->ad_handle) 854 ksnprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle)); 855 else 856 ksnprintf(buf, buflen, "unknown"); 857 return (0); 858 } 859 860 /* PnP information for devctl(8) */ 861 static int 862 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 863 size_t buflen) 864 { 865 ACPI_DEVICE_INFO *adinfo; 866 struct acpi_device *dinfo = device_get_ivars(child); 867 char *end; 868 869 if (ACPI_FAILURE(AcpiGetObjectInfo(dinfo->ad_handle, &adinfo))) { 870 ksnprintf(buf, buflen, "unknown"); 871 } else { 872 ksnprintf(buf, buflen, "_HID=%s _UID=%lu", 873 (adinfo->Valid & ACPI_VALID_HID) ? 874 adinfo->HardwareId.String : "none", 875 (adinfo->Valid & ACPI_VALID_UID) ? 876 strtoul(adinfo->UniqueId.String, &end, 10) : 0); 877 if (adinfo) 878 AcpiOsFree(adinfo); 879 } 880 return (0); 881 } 882 883 /* 884 * Handle per-device ivars 885 */ 886 static int 887 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 888 { 889 struct acpi_device *ad; 890 891 if ((ad = device_get_ivars(child)) == NULL) { 892 device_printf(child, "device has no ivars\n"); 893 return (ENOENT); 894 } 895 896 /* ACPI and ISA compatibility ivars */ 897 switch(index) { 898 case ACPI_IVAR_HANDLE: 899 *(ACPI_HANDLE *)result = ad->ad_handle; 900 break; 901 case ACPI_IVAR_MAGIC: 902 *result = ad->ad_magic; 903 break; 904 case ACPI_IVAR_PRIVATE: 905 *(void **)result = ad->ad_private; 906 break; 907 case ACPI_IVAR_FLAGS: 908 *(int *)result = ad->ad_flags; 909 break; 910 case ISA_IVAR_VENDORID: 911 case ISA_IVAR_SERIAL: 912 case ISA_IVAR_COMPATID: 913 *(int *)result = -1; 914 break; 915 case ISA_IVAR_LOGICALID: 916 *(int *)result = acpi_isa_get_logicalid(child); 917 break; 918 default: 919 return (ENOENT); 920 } 921 922 return (0); 923 } 924 925 static int 926 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 927 { 928 struct acpi_device *ad; 929 930 if ((ad = device_get_ivars(child)) == NULL) { 931 device_printf(child, "device has no ivars\n"); 932 return (ENOENT); 933 } 934 935 switch(index) { 936 case ACPI_IVAR_HANDLE: 937 ad->ad_handle = (ACPI_HANDLE)value; 938 break; 939 case ACPI_IVAR_MAGIC: 940 ad->ad_magic = value; 941 break; 942 case ACPI_IVAR_PRIVATE: 943 ad->ad_private = (void *)value; 944 break; 945 case ACPI_IVAR_FLAGS: 946 ad->ad_flags = (int)value; 947 break; 948 default: 949 panic("bad ivar write request (%d)", index); 950 return (ENOENT); 951 } 952 953 return (0); 954 } 955 956 /* 957 * Handle child resource allocation/removal 958 */ 959 static struct resource_list * 960 acpi_get_rlist(device_t dev, device_t child) 961 { 962 struct acpi_device *ad; 963 964 ad = device_get_ivars(child); 965 return (&ad->ad_rl); 966 } 967 968 /* 969 * Pre-allocate/manage all memory and IO resources. Since rman can't handle 970 * duplicates, we merge any in the sysresource attach routine. 971 */ 972 static int 973 acpi_sysres_alloc(device_t dev) 974 { 975 struct resource *res; 976 struct resource_list *rl; 977 struct resource_list_entry *rle; 978 struct rman *rm; 979 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 980 device_t *children; 981 int child_count, i; 982 /* 983 * Probe/attach any sysresource devices. This would be unnecessary if we 984 * had multi-pass probe/attach. 985 */ 986 if (device_get_children(dev, &children, &child_count) != 0) 987 return (ENXIO); 988 for (i = 0; i < child_count; i++) { 989 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 990 device_probe_and_attach(children[i]); 991 } 992 kfree(children, M_TEMP); 993 994 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev); 995 if(!rl) 996 return 0; 997 SLIST_FOREACH(rle, rl, link) { 998 if (rle->res != NULL) { 999 device_printf(dev, "duplicate resource for %lx\n", rle->start); 1000 continue; 1001 } 1002 1003 /* Only memory and IO resources are valid here. */ 1004 switch (rle->type) { 1005 case SYS_RES_IOPORT: 1006 rm = &acpi_rman_io; 1007 break; 1008 case SYS_RES_MEMORY: 1009 rm = &acpi_rman_mem; 1010 break; 1011 default: 1012 continue; 1013 } 1014 1015 /* Pre-allocate resource and add to our rman pool. */ 1016 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type, 1017 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 1018 0, -1); 1019 if (res != NULL) { 1020 rman_manage_region(rm, rman_get_start(res), rman_get_end(res)); 1021 rle->res = res; 1022 } else 1023 device_printf(dev, "reservation of %lx, %lx (%d) failed\n", 1024 rle->start, rle->count, rle->type); 1025 } 1026 return (0); 1027 } 1028 1029 static struct resource * 1030 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 1031 u_long start, u_long end, u_long count, u_int flags, int cpuid) 1032 { 1033 ACPI_RESOURCE ares; 1034 struct acpi_device *ad = device_get_ivars(child); 1035 struct resource_list *rl = &ad->ad_rl; 1036 struct resource_list_entry *rle; 1037 struct resource *res; 1038 struct rman *rm; 1039 1040 res = NULL; 1041 1042 /* We only handle memory and IO resources through rman. */ 1043 switch (type) { 1044 case SYS_RES_IOPORT: 1045 rm = &acpi_rman_io; 1046 break; 1047 case SYS_RES_MEMORY: 1048 rm = &acpi_rman_mem; 1049 break; 1050 default: 1051 rm = NULL; 1052 } 1053 1054 ACPI_SERIAL_BEGIN(acpi); 1055 1056 /* 1057 * If this is an allocation of the "default" range for a given RID, and 1058 * we know what the resources for this device are (i.e., they're on the 1059 * child's resource list), use those start/end values. 1060 */ 1061 if (bus == device_get_parent(child) && start == 0UL && end == ~0UL) { 1062 rle = resource_list_find(rl, type, *rid); 1063 if (rle == NULL) 1064 goto out; 1065 start = rle->start; 1066 end = rle->end; 1067 count = rle->count; 1068 cpuid = rle->cpuid; 1069 } 1070 1071 /* 1072 * If this is an allocation of a specific range, see if we can satisfy 1073 * the request from our system resource regions. If we can't, pass the 1074 * request up to the parent. 1075 */ 1076 if (start + count - 1 == end && rm != NULL) 1077 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE, 1078 child); 1079 if (res == NULL) { 1080 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid, 1081 start, end, count, flags, cpuid); 1082 } else { 1083 rman_set_rid(res, *rid); 1084 1085 /* If requested, activate the resource using the parent's method. */ 1086 if (flags & RF_ACTIVE) 1087 if (bus_activate_resource(child, type, *rid, res) != 0) { 1088 rman_release_resource(res); 1089 res = NULL; 1090 goto out; 1091 } 1092 } 1093 1094 if (res != NULL && device_get_parent(child) == bus) 1095 switch (type) { 1096 case SYS_RES_IRQ: 1097 /* 1098 * Since bus_config_intr() takes immediate effect, we cannot 1099 * configure the interrupt associated with a device when we 1100 * parse the resources but have to defer it until a driver 1101 * actually allocates the interrupt via bus_alloc_resource(). 1102 * 1103 * XXX: Should we handle the lookup failing? 1104 */ 1105 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares))) 1106 acpi_config_intr(child, &ares); 1107 else 1108 kprintf("irq resource not found\n"); 1109 break; 1110 } 1111 1112 out: 1113 ACPI_SERIAL_END(acpi); 1114 return (res); 1115 } 1116 1117 static int 1118 acpi_release_resource(device_t bus, device_t child, int type, int rid, 1119 struct resource *r) 1120 { 1121 struct rman *rm; 1122 int ret; 1123 1124 /* We only handle memory and IO resources through rman. */ 1125 switch (type) { 1126 case SYS_RES_IOPORT: 1127 rm = &acpi_rman_io; 1128 break; 1129 case SYS_RES_MEMORY: 1130 rm = &acpi_rman_mem; 1131 break; 1132 default: 1133 rm = NULL; 1134 } 1135 1136 ACPI_SERIAL_BEGIN(acpi); 1137 1138 /* 1139 * If this resource belongs to one of our internal managers, 1140 * deactivate it and release it to the local pool. If it doesn't, 1141 * pass this request up to the parent. 1142 */ 1143 if (rm != NULL && rman_is_region_manager(r, rm)) { 1144 if (rman_get_flags(r) & RF_ACTIVE) { 1145 ret = bus_deactivate_resource(child, type, rid, r); 1146 if (ret != 0) 1147 goto out; 1148 } 1149 ret = rman_release_resource(r); 1150 } else 1151 ret = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, type, rid, r); 1152 1153 out: 1154 ACPI_SERIAL_END(acpi); 1155 return (ret); 1156 } 1157 1158 static void 1159 acpi_delete_resource(device_t bus, device_t child, int type, int rid) 1160 { 1161 struct resource_list *rl; 1162 1163 rl = acpi_get_rlist(bus, child); 1164 resource_list_delete(rl, type, rid); 1165 } 1166 1167 /* Allocate an IO port or memory resource, given its GAS. */ 1168 int 1169 acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas, 1170 struct resource **res, u_int flags) 1171 { 1172 int error, res_type; 1173 1174 error = ENOMEM; 1175 if (type == NULL || rid == NULL || gas == NULL || res == NULL) 1176 return (EINVAL); 1177 1178 /* We only support memory and IO spaces. */ 1179 switch (gas->SpaceId) { 1180 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1181 res_type = SYS_RES_MEMORY; 1182 break; 1183 case ACPI_ADR_SPACE_SYSTEM_IO: 1184 res_type = SYS_RES_IOPORT; 1185 break; 1186 default: 1187 return (EOPNOTSUPP); 1188 } 1189 1190 /* 1191 * If the register width is less than 8, assume the BIOS author means 1192 * it is a bit field and just allocate a byte. 1193 */ 1194 if (gas->BitWidth && gas->BitWidth < 8) 1195 gas->BitWidth = 8; 1196 1197 /* Validate the address after we're sure we support the space. */ 1198 if (gas->Address == 0 || gas->BitWidth == 0) 1199 return (EINVAL); 1200 1201 bus_set_resource(dev, res_type, *rid, gas->Address, 1202 gas->BitWidth / 8, -1); 1203 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags); 1204 if (*res != NULL) { 1205 *type = res_type; 1206 error = 0; 1207 } else 1208 bus_delete_resource(dev, res_type, *rid); 1209 1210 return (error); 1211 } 1212 1213 ACPI_STATUS 1214 acpi_eval_osc(device_t dev, ACPI_HANDLE handle, const char *uuidstr, 1215 int revision, uint32_t *buf, int count) 1216 { 1217 ACPI_BUFFER retbuf = { ACPI_ALLOCATE_BUFFER, NULL }; 1218 ACPI_OBJECT_LIST arglist; 1219 ACPI_OBJECT arg[4]; 1220 ACPI_OBJECT *retobj; 1221 ACPI_STATUS status; 1222 struct uuid uuid; 1223 uint32_t error; 1224 uint8_t oscuuid[16]; 1225 int i; 1226 1227 if (parse_uuid(uuidstr, &uuid) != 0) 1228 return (AE_ERROR); 1229 le_uuid_enc(oscuuid, &uuid); 1230 1231 arglist.Pointer = arg; 1232 arglist.Count = 4; 1233 arg[0].Type = ACPI_TYPE_BUFFER; 1234 arg[0].Buffer.Length = sizeof(oscuuid); 1235 arg[0].Buffer.Pointer = oscuuid; /* UUID */ 1236 arg[1].Type = ACPI_TYPE_INTEGER; 1237 arg[1].Integer.Value = revision; /* revision */ 1238 arg[2].Type = ACPI_TYPE_INTEGER; 1239 arg[2].Integer.Value = count; /* # of cap integers */ 1240 arg[3].Type = ACPI_TYPE_BUFFER; 1241 arg[3].Buffer.Length = count * sizeof(uint32_t); /* capabilities buffer */ 1242 arg[3].Buffer.Pointer = (uint8_t *)buf; 1243 1244 status = AcpiEvaluateObject(handle, "_OSC", &arglist, &retbuf); 1245 if (ACPI_FAILURE(status)) { 1246 return (status); 1247 } else { 1248 retobj = retbuf.Pointer; 1249 error = ((uint32_t *)retobj->Buffer.Pointer)[0] & 1250 ~ACPI_OSC_QUERY_SUPPORT; 1251 if (error & ACPI_OSCERR_OSCFAIL) { 1252 device_printf(dev, "_OSC unable to process request\n"); 1253 status = AE_ERROR; 1254 } 1255 if (error & ACPI_OSCERR_UUID) { 1256 device_printf(dev, "_OSC unrecognized UUID (%s)\n", uuidstr); 1257 status = AE_ERROR; 1258 } 1259 if (error & ACPI_OSCERR_REVISION) { 1260 device_printf(dev, "_OSC unrecognized revision ID (%d)\n", 1261 revision); 1262 status = AE_ERROR; 1263 } 1264 if (error & ACPI_OSCERR_CAPSMASKED) { 1265 if (buf[0] & ACPI_OSC_QUERY_SUPPORT) 1266 goto done; 1267 for (i = 1; i < count; i++) { 1268 device_printf(dev, 1269 "_OSC capabilities have been masked: buf[%d]:%#x\n", 1270 i, buf[i] & ~((uint32_t *)retobj->Buffer.Pointer)[i]); 1271 } 1272 status = AE_SUPPORT; 1273 } 1274 } 1275 1276 done: 1277 AcpiOsFree(retbuf.Pointer); 1278 return (status); 1279 } 1280 1281 /* Probe _HID and _CID for compatible ISA PNP ids. */ 1282 static uint32_t 1283 acpi_isa_get_logicalid(device_t dev) 1284 { 1285 ACPI_DEVICE_INFO *devinfo; 1286 ACPI_HANDLE h; 1287 uint32_t pnpid; 1288 1289 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1290 1291 devinfo = NULL; 1292 pnpid = 0; 1293 1294 /* Fetch and validate the HID. */ 1295 if ((h = acpi_get_handle(dev)) == NULL || 1296 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1297 goto out; 1298 1299 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 1300 pnpid = PNP_EISAID(devinfo->HardwareId.String); 1301 1302 out: 1303 if (devinfo) 1304 AcpiOsFree(devinfo); 1305 return_VALUE (pnpid); 1306 } 1307 1308 static int 1309 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 1310 { 1311 ACPI_DEVICE_INFO *devinfo; 1312 ACPI_HANDLE h; 1313 uint32_t *pnpid; 1314 int valid, i; 1315 1316 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1317 1318 devinfo = NULL; 1319 pnpid = cids; 1320 valid = 0; 1321 1322 /* Fetch and validate the CID */ 1323 if ((h = acpi_get_handle(dev)) == NULL || 1324 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)) || 1325 (devinfo->Valid & ACPI_VALID_CID) == 0) 1326 goto out; 1327 1328 if (devinfo->CompatibleIdList.Count < count) 1329 count = devinfo->CompatibleIdList.Count; 1330 for (i = 0; i < count; i++) { 1331 if (strncmp(devinfo->CompatibleIdList.Ids[i].String, "PNP", 3) != 0) 1332 continue; 1333 *pnpid++ = PNP_EISAID(devinfo->CompatibleIdList.Ids[i].String); 1334 valid++; 1335 } 1336 1337 out: 1338 if (devinfo) 1339 AcpiOsFree(devinfo); 1340 return_VALUE (valid); 1341 } 1342 1343 static char * 1344 acpi_device_id_probe(device_t bus, device_t dev, char **ids) 1345 { 1346 ACPI_HANDLE h; 1347 int i; 1348 1349 h = acpi_get_handle(dev); 1350 if (ids == NULL || h == NULL || acpi_get_type(dev) != ACPI_TYPE_DEVICE) 1351 return (NULL); 1352 1353 /* Try to match one of the array of IDs with a HID or CID. */ 1354 for (i = 0; ids[i] != NULL; i++) { 1355 if (acpi_MatchHid(h, ids[i])) 1356 return (ids[i]); 1357 } 1358 return (NULL); 1359 } 1360 1361 static ACPI_STATUS 1362 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname, 1363 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret) 1364 { 1365 ACPI_HANDLE h; 1366 1367 if (dev == NULL) 1368 h = ACPI_ROOT_OBJECT; 1369 else if ((h = acpi_get_handle(dev)) == NULL) 1370 return (AE_BAD_PARAMETER); 1371 return (AcpiEvaluateObject(h, pathname, parameters, ret)); 1372 } 1373 1374 static int 1375 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate) 1376 { 1377 struct acpi_softc *sc; 1378 ACPI_HANDLE handle; 1379 ACPI_STATUS status; 1380 char sxd[8]; 1381 int error; 1382 1383 sc = device_get_softc(bus); 1384 handle = acpi_get_handle(dev); 1385 1386 /* 1387 * XXX If we find these devices, don't try to power them down. 1388 * The serial and IRDA ports on my T23 hang the system when 1389 * set to D3 and it appears that such legacy devices may 1390 * need special handling in their drivers. 1391 */ 1392 if (handle == NULL || 1393 acpi_MatchHid(handle, "PNP0500") || 1394 acpi_MatchHid(handle, "PNP0501") || 1395 acpi_MatchHid(handle, "PNP0502") || 1396 acpi_MatchHid(handle, "PNP0510") || 1397 acpi_MatchHid(handle, "PNP0511")) 1398 return (ENXIO); 1399 1400 /* 1401 * Override next state with the value from _SxD, if present. If no 1402 * dstate argument was provided, don't fetch the return value. 1403 */ 1404 ksnprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate); 1405 if (dstate) 1406 status = acpi_GetInteger(handle, sxd, dstate); 1407 else 1408 status = AcpiEvaluateObject(handle, sxd, NULL, NULL); 1409 1410 switch (status) { 1411 case AE_OK: 1412 error = 0; 1413 break; 1414 case AE_NOT_FOUND: 1415 error = ESRCH; 1416 break; 1417 default: 1418 error = ENXIO; 1419 break; 1420 } 1421 1422 return (error); 1423 } 1424 1425 /* Callback arg for our implementation of walking the namespace. */ 1426 struct acpi_device_scan_ctx { 1427 acpi_scan_cb_t user_fn; 1428 void *arg; 1429 ACPI_HANDLE parent; 1430 }; 1431 1432 static ACPI_STATUS 1433 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval) 1434 { 1435 struct acpi_device_scan_ctx *ctx; 1436 device_t dev, old_dev; 1437 ACPI_STATUS status; 1438 ACPI_OBJECT_TYPE type; 1439 1440 /* 1441 * Skip this device if we think we'll have trouble with it or it is 1442 * the parent where the scan began. 1443 */ 1444 ctx = (struct acpi_device_scan_ctx *)arg; 1445 if (acpi_avoid(h) || h == ctx->parent) 1446 return (AE_OK); 1447 1448 /* If this is not a valid device type (e.g., a method), skip it. */ 1449 if (ACPI_FAILURE(AcpiGetType(h, &type))) 1450 return (AE_OK); 1451 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR && 1452 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER) 1453 return (AE_OK); 1454 1455 /* 1456 * Call the user function with the current device. If it is unchanged 1457 * afterwards, return. Otherwise, we update the handle to the new dev. 1458 */ 1459 old_dev = acpi_get_device(h); 1460 dev = old_dev; 1461 status = ctx->user_fn(h, &dev, level, ctx->arg); 1462 if (ACPI_FAILURE(status) || old_dev == dev) 1463 return (status); 1464 1465 /* Remove the old child and its connection to the handle. */ 1466 if (old_dev != NULL) { 1467 device_delete_child(device_get_parent(old_dev), old_dev); 1468 AcpiDetachData(h, acpi_fake_objhandler); 1469 } 1470 1471 /* Recreate the handle association if the user created a device. */ 1472 if (dev != NULL) 1473 AcpiAttachData(h, acpi_fake_objhandler, dev); 1474 1475 return (AE_OK); 1476 } 1477 1478 static ACPI_STATUS 1479 acpi_device_scan_children(device_t bus, device_t dev, int max_depth, 1480 acpi_scan_cb_t user_fn, void *arg) 1481 { 1482 ACPI_HANDLE h; 1483 struct acpi_device_scan_ctx ctx; 1484 1485 if (acpi_disabled("children")) 1486 return (AE_OK); 1487 1488 if (dev == NULL) 1489 h = ACPI_ROOT_OBJECT; 1490 else if ((h = acpi_get_handle(dev)) == NULL) 1491 return (AE_BAD_PARAMETER); 1492 ctx.user_fn = user_fn; 1493 ctx.arg = arg; 1494 ctx.parent = h; 1495 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth, 1496 acpi_device_scan_cb, NULL, &ctx, NULL)); 1497 } 1498 1499 /* 1500 * Even though ACPI devices are not PCI, we use the PCI approach for setting 1501 * device power states since it's close enough to ACPI. 1502 */ 1503 static int 1504 acpi_set_powerstate_method(device_t bus, device_t child, int state) 1505 { 1506 ACPI_HANDLE h; 1507 ACPI_STATUS status; 1508 int error; 1509 1510 error = 0; 1511 h = acpi_get_handle(child); 1512 if (state < ACPI_STATE_D0 || state > ACPI_STATE_D3) 1513 return (EINVAL); 1514 if (h == NULL) 1515 return (0); 1516 1517 /* Ignore errors if the power methods aren't present. */ 1518 status = acpi_pwr_switch_consumer(h, state); 1519 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND 1520 && status != AE_BAD_PARAMETER) 1521 device_printf(bus, "failed to set ACPI power state D%d on %s: %s\n", 1522 state, acpi_name(h), AcpiFormatException(status)); 1523 1524 return (error); 1525 } 1526 1527 static int 1528 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 1529 { 1530 int result, cid_count, i; 1531 uint32_t lid, cids[8]; 1532 1533 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1534 1535 /* 1536 * ISA-style drivers attached to ACPI may persist and 1537 * probe manually if we return ENOENT. We never want 1538 * that to happen, so don't ever return it. 1539 */ 1540 result = ENXIO; 1541 1542 /* Scan the supplied IDs for a match */ 1543 lid = acpi_isa_get_logicalid(child); 1544 cid_count = acpi_isa_get_compatid(child, cids, 8); 1545 while (ids && ids->ip_id) { 1546 if (lid == ids->ip_id) { 1547 result = 0; 1548 goto out; 1549 } 1550 for (i = 0; i < cid_count; i++) { 1551 if (cids[i] == ids->ip_id) { 1552 result = 0; 1553 goto out; 1554 } 1555 } 1556 ids++; 1557 } 1558 1559 out: 1560 if (result == 0 && ids->ip_desc) 1561 device_set_desc(child, ids->ip_desc); 1562 1563 return_VALUE (result); 1564 } 1565 1566 /* 1567 * Look for a MCFG table. If it is present, use the settings for 1568 * domain (segment) 0 to setup PCI config space access via the memory 1569 * map. 1570 */ 1571 static void 1572 acpi_enable_pcie(void) 1573 { 1574 ACPI_TABLE_HEADER *hdr; 1575 ACPI_MCFG_ALLOCATION *alloc, *end; 1576 ACPI_STATUS status; 1577 1578 status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr); 1579 if (ACPI_FAILURE(status)) 1580 return; 1581 1582 end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length); 1583 alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1); 1584 while (alloc < end) { 1585 if (alloc->PciSegment == 0) { 1586 pcie_cfgregopen(alloc->Address, alloc->StartBusNumber, 1587 alloc->EndBusNumber); 1588 return; 1589 } 1590 alloc++; 1591 } 1592 } 1593 1594 /* 1595 * Scan all of the ACPI namespace and attach child devices. 1596 * 1597 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and 1598 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec. 1599 * However, in violation of the spec, some systems place their PCI link 1600 * devices in \, so we have to walk the whole namespace. We check the 1601 * type of namespace nodes, so this should be ok. 1602 */ 1603 static void 1604 acpi_probe_children(device_t bus) 1605 { 1606 1607 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1608 1609 /* 1610 * Scan the namespace and insert placeholders for all the devices that 1611 * we find. We also probe/attach any early devices. 1612 * 1613 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1614 * we want to create nodes for all devices, not just those that are 1615 * currently present. (This assumes that we don't want to create/remove 1616 * devices as they appear, which might be smarter.) 1617 */ 1618 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1619 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, 1620 acpi_probe_child, NULL, bus, NULL); 1621 1622 /* Pre-allocate resources for our rman from any sysresource devices. */ 1623 acpi_sysres_alloc(bus); 1624 /* Create any static children by calling device identify methods. */ 1625 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1626 bus_generic_probe(bus); 1627 1628 /* Probe/attach all children, created staticly and from the namespace. */ 1629 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 1630 bus_generic_attach(bus); 1631 1632 /* 1633 * Some of these children may have attached others as part of their attach 1634 * process (eg. the root PCI bus driver), so rescan. 1635 */ 1636 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 1637 bus_generic_attach(bus); 1638 1639 /* Attach wake sysctls. */ 1640 acpi_wake_sysctl_walk(bus); 1641 1642 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1643 return_VOID; 1644 } 1645 1646 /* 1647 * Determine the probe order for a given device. 1648 */ 1649 static void 1650 acpi_probe_order(ACPI_HANDLE handle, int *order) 1651 { 1652 ACPI_OBJECT_TYPE type; 1653 1654 /* 1655 * 1. I/O port and memory system resource holders 1656 * 2. Embedded controllers (to handle early accesses) 1657 * 3. PCI Link Devices 1658 * 100000. CPUs 1659 */ 1660 AcpiGetType(handle, &type); 1661 if (acpi_MatchHid(handle, "PNP0C01") || acpi_MatchHid(handle, "PNP0C02")) 1662 *order = 1; 1663 else if (acpi_MatchHid(handle, "PNP0C09")) 1664 *order = 2; 1665 else if (acpi_MatchHid(handle, "PNP0C0F")) 1666 *order = 3; 1667 else if (type == ACPI_TYPE_PROCESSOR) 1668 *order = 100000; 1669 } 1670 1671 /* 1672 * Evaluate a child device and determine whether we might attach a device to 1673 * it. 1674 */ 1675 static ACPI_STATUS 1676 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1677 { 1678 struct acpi_prw_data prw; 1679 ACPI_OBJECT_TYPE type; 1680 ACPI_HANDLE h; 1681 device_t bus, child; 1682 int order; 1683 char *handle_str; 1684 1685 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1686 1687 if (acpi_disabled("children")) 1688 return_ACPI_STATUS (AE_OK); 1689 1690 /* Skip this device if we think we'll have trouble with it. */ 1691 if (acpi_avoid(handle)) 1692 return_ACPI_STATUS (AE_OK); 1693 1694 bus = (device_t)context; 1695 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1696 handle_str = acpi_name(handle); 1697 switch (type) { 1698 case ACPI_TYPE_DEVICE: 1699 /* 1700 * Since we scan from \, be sure to skip system scope objects. 1701 * \_SB_ and \_TZ_ are defined in ACPICA as devices to work around 1702 * BIOS bugs. For example, \_SB_ is to allow \_SB_._INI to be run 1703 * during the intialization and \_TZ_ is to support Notify() on it. 1704 */ 1705 if (strcmp(handle_str, "\\_SB_") == 0 || 1706 strcmp(handle_str, "\\_TZ_") == 0) 1707 break; 1708 1709 if (acpi_parse_prw(handle, &prw) == 0) 1710 AcpiSetupGpeForWake(handle, prw.gpe_handle, prw.gpe_bit); 1711 1712 /* FALLTHROUGH */ 1713 case ACPI_TYPE_PROCESSOR: 1714 case ACPI_TYPE_THERMAL: 1715 case ACPI_TYPE_POWER: 1716 /* 1717 * Create a placeholder device for this node. Sort the 1718 * placeholder so that the probe/attach passes will run 1719 * breadth-first. Orders less than ACPI_DEV_BASE_ORDER 1720 * are reserved for special objects (i.e., system 1721 * resources). CPU devices have a very high order to 1722 * ensure they are probed after other devices. 1723 */ 1724 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str)); 1725 order = level * 10 + 100; 1726 acpi_probe_order(handle, &order); 1727 child = BUS_ADD_CHILD(bus, bus, order, NULL, -1); 1728 if (child == NULL) 1729 break; 1730 1731 /* Associate the handle with the device_t and vice versa. */ 1732 acpi_set_handle(child, handle); 1733 AcpiAttachData(handle, acpi_fake_objhandler, child); 1734 1735 /* 1736 * Check that the device is present. If it's not present, 1737 * leave it disabled (so that we have a device_t attached to 1738 * the handle, but we don't probe it). 1739 * 1740 * XXX PCI link devices sometimes report "present" but not 1741 * "functional" (i.e. if disabled). Go ahead and probe them 1742 * anyway since we may enable them later. 1743 */ 1744 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 1745 /* Never disable PCI link devices. */ 1746 if (acpi_MatchHid(handle, "PNP0C0F")) 1747 break; 1748 /* 1749 * Docking stations should remain enabled since the system 1750 * may be undocked at boot. 1751 */ 1752 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h))) 1753 break; 1754 1755 device_disable(child); 1756 break; 1757 } 1758 1759 /* 1760 * Get the device's resource settings and attach them. 1761 * Note that if the device has _PRS but no _CRS, we need 1762 * to decide when it's appropriate to try to configure the 1763 * device. Ignore the return value here; it's OK for the 1764 * device not to have any resources. 1765 */ 1766 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 1767 break; 1768 } 1769 } 1770 1771 return_ACPI_STATUS (AE_OK); 1772 } 1773 1774 /* 1775 * AcpiAttachData() requires an object handler but never uses it. This is a 1776 * placeholder object handler so we can store a device_t in an ACPI_HANDLE. 1777 */ 1778 void 1779 acpi_fake_objhandler(ACPI_HANDLE h, void *data) 1780 { 1781 } 1782 1783 static void 1784 acpi_shutdown_final(void *arg, int howto) 1785 { 1786 struct acpi_softc *sc; 1787 ACPI_STATUS status; 1788 1789 /* 1790 * XXX Shutdown code should only run on the BSP (cpuid 0). 1791 * Some chipsets do not power off the system correctly if called from 1792 * an AP. 1793 */ 1794 sc = arg; 1795 if ((howto & RB_POWEROFF) != 0) { 1796 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 1797 if (ACPI_FAILURE(status)) { 1798 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 1799 AcpiFormatException(status)); 1800 return; 1801 } 1802 device_printf(sc->acpi_dev, "Powering system off\n"); 1803 ACPI_DISABLE_IRQS(); 1804 status = AcpiEnterSleepState(ACPI_STATE_S5); 1805 if (ACPI_FAILURE(status)) { 1806 device_printf(sc->acpi_dev, "power-off failed - %s\n", 1807 AcpiFormatException(status)); 1808 } else { 1809 DELAY(1000000); 1810 device_printf(sc->acpi_dev, "power-off failed - timeout\n"); 1811 } 1812 } else if ((howto & RB_HALT) == 0 && sc->acpi_handle_reboot) { 1813 /* Reboot using the reset register. */ 1814 status = AcpiReset(); 1815 if (ACPI_FAILURE(status)) { 1816 if (status != AE_NOT_EXIST) 1817 device_printf(sc->acpi_dev, "reset failed - %s\n", 1818 AcpiFormatException(status)); 1819 } else { 1820 DELAY(1000000); 1821 device_printf(sc->acpi_dev, "reset failed - timeout\n"); 1822 } 1823 } else if (sc->acpi_do_disable && panicstr == NULL) { 1824 /* 1825 * Only disable ACPI if the user requested. On some systems, writing 1826 * the disable value to SMI_CMD hangs the system. 1827 */ 1828 device_printf(sc->acpi_dev, "Shutting down\n"); 1829 AcpiTerminate(); 1830 } 1831 } 1832 1833 static void 1834 acpi_enable_fixed_events(struct acpi_softc *sc) 1835 { 1836 static int first_time = 1; 1837 1838 /* Enable and clear fixed events and install handlers. */ 1839 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) { 1840 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 1841 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 1842 acpi_event_power_button_sleep, sc); 1843 if (first_time) 1844 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 1845 } 1846 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) { 1847 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 1848 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 1849 acpi_event_sleep_button_sleep, sc); 1850 if (first_time) 1851 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 1852 } 1853 1854 first_time = 0; 1855 } 1856 1857 /* 1858 * Returns true if the device is actually present and should 1859 * be attached to. This requires the present, enabled, UI-visible 1860 * and diagnostics-passed bits to be set. 1861 */ 1862 BOOLEAN 1863 acpi_DeviceIsPresent(device_t dev) 1864 { 1865 ACPI_DEVICE_INFO *devinfo; 1866 ACPI_HANDLE h; 1867 int ret; 1868 1869 ret = FALSE; 1870 if ((h = acpi_get_handle(dev)) == NULL || 1871 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1872 return (FALSE); 1873 1874 /* If no _STA method, must be present */ 1875 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1876 ret = TRUE; 1877 1878 /* Return true for 'present' and 'functioning' */ 1879 if (ACPI_DEVICE_PRESENT(devinfo->CurrentStatus)) 1880 ret = TRUE; 1881 1882 AcpiOsFree(devinfo); 1883 return (ret); 1884 } 1885 1886 /* 1887 * Returns true if the battery is actually present and inserted. 1888 */ 1889 BOOLEAN 1890 acpi_BatteryIsPresent(device_t dev) 1891 { 1892 ACPI_DEVICE_INFO *devinfo; 1893 ACPI_HANDLE h; 1894 int ret; 1895 1896 ret = FALSE; 1897 if ((h = acpi_get_handle(dev)) == NULL || 1898 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1899 return (FALSE); 1900 1901 /* If no _STA method, must be present */ 1902 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1903 ret = TRUE; 1904 1905 /* Return true for 'present', 'battery present', and 'functioning' */ 1906 if (ACPI_BATTERY_PRESENT(devinfo->CurrentStatus)) 1907 ret = TRUE; 1908 1909 AcpiOsFree(devinfo); 1910 return (ret); 1911 } 1912 1913 /* 1914 * Match a HID string against a handle 1915 */ 1916 BOOLEAN 1917 acpi_MatchHid(ACPI_HANDLE h, const char *hid) 1918 { 1919 ACPI_DEVICE_INFO *devinfo; 1920 int ret, i; 1921 1922 ret = FALSE; 1923 if (hid == NULL || h == NULL || 1924 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1925 return (ret); 1926 1927 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 1928 strcmp(hid, devinfo->HardwareId.String) == 0) 1929 ret = TRUE; 1930 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) { 1931 for (i = 0; i < devinfo->CompatibleIdList.Count; i++) { 1932 if (strcmp(hid, devinfo->CompatibleIdList.Ids[i].String) == 0) { 1933 ret = TRUE; 1934 break; 1935 } 1936 } 1937 } 1938 1939 AcpiOsFree(devinfo); 1940 return (ret); 1941 } 1942 1943 /* 1944 * Return the handle of a named object within our scope, ie. that of (parent) 1945 * or one if its parents. 1946 */ 1947 ACPI_STATUS 1948 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 1949 { 1950 ACPI_HANDLE r; 1951 ACPI_STATUS status; 1952 1953 /* Walk back up the tree to the root */ 1954 for (;;) { 1955 status = AcpiGetHandle(parent, path, &r); 1956 if (ACPI_SUCCESS(status)) { 1957 *result = r; 1958 return (AE_OK); 1959 } 1960 /* XXX Return error here? */ 1961 if (status != AE_NOT_FOUND) 1962 return (AE_OK); 1963 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 1964 return (AE_NOT_FOUND); 1965 parent = r; 1966 } 1967 } 1968 1969 /* 1970 * Allocate a buffer with a preset data size. 1971 */ 1972 ACPI_BUFFER * 1973 acpi_AllocBuffer(int size) 1974 { 1975 ACPI_BUFFER *buf; 1976 1977 if ((buf = kmalloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 1978 return (NULL); 1979 buf->Length = size; 1980 buf->Pointer = (void *)(buf + 1); 1981 return (buf); 1982 } 1983 1984 ACPI_STATUS 1985 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 1986 { 1987 ACPI_OBJECT arg1; 1988 ACPI_OBJECT_LIST args; 1989 1990 arg1.Type = ACPI_TYPE_INTEGER; 1991 arg1.Integer.Value = number; 1992 args.Count = 1; 1993 args.Pointer = &arg1; 1994 1995 return (AcpiEvaluateObject(handle, path, &args, NULL)); 1996 } 1997 1998 /* 1999 * Evaluate a path that should return an integer. 2000 */ 2001 ACPI_STATUS 2002 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 2003 { 2004 ACPI_STATUS status; 2005 ACPI_BUFFER buf; 2006 ACPI_OBJECT param; 2007 2008 if (handle == NULL) 2009 handle = ACPI_ROOT_OBJECT; 2010 2011 /* 2012 * Assume that what we've been pointed at is an Integer object, or 2013 * a method that will return an Integer. 2014 */ 2015 buf.Pointer = ¶m; 2016 buf.Length = sizeof(param); 2017 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2018 if (ACPI_SUCCESS(status)) { 2019 if (param.Type == ACPI_TYPE_INTEGER) 2020 *number = param.Integer.Value; 2021 else 2022 status = AE_TYPE; 2023 } 2024 2025 /* 2026 * In some applications, a method that's expected to return an Integer 2027 * may instead return a Buffer (probably to simplify some internal 2028 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 2029 * convert it into an Integer as best we can. 2030 * 2031 * This is a hack. 2032 */ 2033 if (status == AE_BUFFER_OVERFLOW) { 2034 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 2035 status = AE_NO_MEMORY; 2036 } else { 2037 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2038 if (ACPI_SUCCESS(status)) 2039 status = acpi_ConvertBufferToInteger(&buf, number); 2040 AcpiOsFree(buf.Pointer); 2041 } 2042 } 2043 return (status); 2044 } 2045 2046 ACPI_STATUS 2047 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 2048 { 2049 ACPI_OBJECT *p; 2050 UINT8 *val; 2051 int i; 2052 2053 p = (ACPI_OBJECT *)bufp->Pointer; 2054 if (p->Type == ACPI_TYPE_INTEGER) { 2055 *number = p->Integer.Value; 2056 return (AE_OK); 2057 } 2058 if (p->Type != ACPI_TYPE_BUFFER) 2059 return (AE_TYPE); 2060 if (p->Buffer.Length > sizeof(int)) 2061 return (AE_BAD_DATA); 2062 2063 *number = 0; 2064 val = p->Buffer.Pointer; 2065 for (i = 0; i < p->Buffer.Length; i++) 2066 *number += val[i] << (i * 8); 2067 return (AE_OK); 2068 } 2069 2070 /* 2071 * Iterate over the elements of an a package object, calling the supplied 2072 * function for each element. 2073 * 2074 * XXX possible enhancement might be to abort traversal on error. 2075 */ 2076 ACPI_STATUS 2077 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 2078 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 2079 { 2080 ACPI_OBJECT *comp; 2081 int i; 2082 2083 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 2084 return (AE_BAD_PARAMETER); 2085 2086 /* Iterate over components */ 2087 i = 0; 2088 comp = pkg->Package.Elements; 2089 for (; i < pkg->Package.Count; i++, comp++) 2090 func(comp, arg); 2091 2092 return (AE_OK); 2093 } 2094 2095 /* 2096 * Find the (index)th resource object in a set. 2097 */ 2098 ACPI_STATUS 2099 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 2100 { 2101 ACPI_RESOURCE *rp; 2102 int i; 2103 2104 rp = (ACPI_RESOURCE *)buf->Pointer; 2105 i = index; 2106 while (i-- > 0) { 2107 /* Range check */ 2108 if (rp > (ACPI_RESOURCE *)((uint8_t *)buf->Pointer + buf->Length)) 2109 return (AE_BAD_PARAMETER); 2110 2111 /* Check for terminator */ 2112 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2113 return (AE_NOT_FOUND); 2114 rp = ACPI_NEXT_RESOURCE(rp); 2115 } 2116 if (resp != NULL) 2117 *resp = rp; 2118 2119 return (AE_OK); 2120 } 2121 2122 /* 2123 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 2124 * 2125 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 2126 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 2127 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 2128 * resources. 2129 */ 2130 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 2131 2132 ACPI_STATUS 2133 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 2134 { 2135 ACPI_RESOURCE *rp; 2136 void *newp; 2137 2138 /* Initialise the buffer if necessary. */ 2139 if (buf->Pointer == NULL) { 2140 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 2141 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 2142 return (AE_NO_MEMORY); 2143 rp = (ACPI_RESOURCE *)buf->Pointer; 2144 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2145 rp->Length = 0; 2146 } 2147 if (res == NULL) 2148 return (AE_OK); 2149 2150 /* 2151 * Scan the current buffer looking for the terminator. 2152 * This will either find the terminator or hit the end 2153 * of the buffer and return an error. 2154 */ 2155 rp = (ACPI_RESOURCE *)buf->Pointer; 2156 for (;;) { 2157 /* Range check, don't go outside the buffer */ 2158 if (rp >= (ACPI_RESOURCE *)((uint8_t *)buf->Pointer + buf->Length)) 2159 return (AE_BAD_PARAMETER); 2160 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2161 break; 2162 rp = ACPI_NEXT_RESOURCE(rp); 2163 } 2164 2165 /* 2166 * Check the size of the buffer and expand if required. 2167 * 2168 * Required size is: 2169 * size of existing resources before terminator + 2170 * size of new resource and header + 2171 * size of terminator. 2172 * 2173 * Note that this loop should really only run once, unless 2174 * for some reason we are stuffing a *really* huge resource. 2175 */ 2176 while ((((uint8_t *)rp - (uint8_t *)buf->Pointer) + 2177 res->Length + ACPI_RS_SIZE_NO_DATA + 2178 ACPI_RS_SIZE_MIN) >= buf->Length) { 2179 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 2180 return (AE_NO_MEMORY); 2181 bcopy(buf->Pointer, newp, buf->Length); 2182 rp = (ACPI_RESOURCE *)((uint8_t *)newp + 2183 ((uint8_t *)rp - (uint8_t *)buf->Pointer)); 2184 AcpiOsFree(buf->Pointer); 2185 buf->Pointer = newp; 2186 buf->Length += buf->Length; 2187 } 2188 2189 /* Insert the new resource. */ 2190 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA); 2191 2192 /* And add the terminator. */ 2193 rp = ACPI_NEXT_RESOURCE(rp); 2194 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2195 rp->Length = 0; 2196 2197 return (AE_OK); 2198 } 2199 2200 /* 2201 * Set interrupt model. 2202 */ 2203 ACPI_STATUS 2204 acpi_SetIntrModel(int model) 2205 { 2206 2207 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 2208 } 2209 2210 /* 2211 * DEPRECATED. This interface has serious deficiencies and will be 2212 * removed. 2213 * 2214 * Immediately enter the sleep state. In the old model, acpiconf(8) ran 2215 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this. 2216 */ 2217 ACPI_STATUS 2218 acpi_SetSleepState(struct acpi_softc *sc, int state) 2219 { 2220 static int once; 2221 2222 if (!once) { 2223 device_printf(sc->acpi_dev, 2224 "warning: acpi_SetSleepState() deprecated, need to update your software\n"); 2225 once = 1; 2226 } 2227 return (acpi_EnterSleepState(sc, state)); 2228 } 2229 2230 static void 2231 acpi_sleep_force(void *arg) 2232 { 2233 struct acpi_softc *sc; 2234 2235 sc = arg; 2236 device_printf(sc->acpi_dev, 2237 "suspend request timed out, forcing sleep now\n"); 2238 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2239 device_printf(sc->acpi_dev, "force sleep state S%d failed\n", 2240 sc->acpi_next_sstate); 2241 } 2242 2243 /* 2244 * Request that the system enter the given suspend state. All /dev/apm 2245 * devices and devd(8) will be notified. Userland then has a chance to 2246 * save state and acknowledge the request. The system sleeps once all 2247 * acks are in. 2248 */ 2249 int 2250 acpi_ReqSleepState(struct acpi_softc *sc, int state) 2251 { 2252 #ifdef notyet 2253 struct apm_clone_data *clone; 2254 #endif 2255 2256 if (state < ACPI_STATE_S1 || state > ACPI_STATE_S5) 2257 return (EINVAL); 2258 2259 /* S5 (soft-off) should be entered directly with no waiting. */ 2260 if (state == ACPI_STATE_S5) { 2261 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, state))) 2262 return (0); 2263 else 2264 return (ENXIO); 2265 } 2266 2267 #if !defined(__i386__) 2268 /* This platform does not support acpi suspend/resume. */ 2269 return (EOPNOTSUPP); 2270 #endif 2271 2272 /* If a suspend request is already in progress, just return. */ 2273 ACPI_LOCK(acpi); 2274 if (sc->acpi_next_sstate != 0) { 2275 ACPI_UNLOCK(acpi); 2276 return (0); 2277 } 2278 2279 /* Record the pending state and notify all apm devices. */ 2280 sc->acpi_next_sstate = state; 2281 #if 0 2282 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2283 clone->notify_status = APM_EV_NONE; 2284 if ((clone->flags & ACPI_EVF_DEVD) == 0) { 2285 KNOTE(&clone->sel_read.si_note, 0); 2286 } 2287 } 2288 #endif 2289 2290 /* If devd(8) is not running, immediately enter the sleep state. */ 2291 if (devctl_process_running() == FALSE) { 2292 ACPI_UNLOCK(acpi); 2293 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) { 2294 return (0); 2295 } else { 2296 return (ENXIO); 2297 } 2298 } 2299 2300 /* Now notify devd(8) also. */ 2301 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state); 2302 2303 /* 2304 * Set a timeout to fire if userland doesn't ack the suspend request 2305 * in time. This way we still eventually go to sleep if we were 2306 * overheating or running low on battery, even if userland is hung. 2307 * We cancel this timeout once all userland acks are in or the 2308 * suspend request is aborted. 2309 */ 2310 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc); 2311 ACPI_UNLOCK(acpi); 2312 return (0); 2313 } 2314 2315 /* 2316 * Acknowledge (or reject) a pending sleep state. The caller has 2317 * prepared for suspend and is now ready for it to proceed. If the 2318 * error argument is non-zero, it indicates suspend should be cancelled 2319 * and gives an errno value describing why. Once all votes are in, 2320 * we suspend the system. 2321 */ 2322 int 2323 acpi_AckSleepState(struct apm_clone_data *clone, int error) 2324 { 2325 struct acpi_softc *sc; 2326 int ret, sleeping; 2327 2328 #if !defined(__i386__) 2329 /* This platform does not support acpi suspend/resume. */ 2330 return (EOPNOTSUPP); 2331 #endif 2332 2333 /* If no pending sleep state, return an error. */ 2334 ACPI_LOCK(acpi); 2335 sc = clone->acpi_sc; 2336 if (sc->acpi_next_sstate == 0) { 2337 ACPI_UNLOCK(acpi); 2338 return (ENXIO); 2339 } 2340 2341 /* Caller wants to abort suspend process. */ 2342 if (error) { 2343 sc->acpi_next_sstate = 0; 2344 callout_stop(&sc->susp_force_to); 2345 device_printf(sc->acpi_dev, 2346 "listener on %s cancelled the pending suspend\n", 2347 devtoname(clone->cdev)); 2348 ACPI_UNLOCK(acpi); 2349 return (0); 2350 } 2351 2352 /* 2353 * Mark this device as acking the suspend request. Then, walk through 2354 * all devices, seeing if they agree yet. We only count devices that 2355 * are writable since read-only devices couldn't ack the request. 2356 */ 2357 clone->notify_status = APM_EV_ACKED; 2358 sleeping = TRUE; 2359 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2360 if ((clone->flags & ACPI_EVF_WRITE) != 0 && 2361 clone->notify_status != APM_EV_ACKED) { 2362 sleeping = FALSE; 2363 break; 2364 } 2365 } 2366 2367 /* If all devices have voted "yes", we will suspend now. */ 2368 if (sleeping) 2369 callout_stop(&sc->susp_force_to); 2370 ACPI_UNLOCK(acpi); 2371 ret = 0; 2372 if (sleeping) { 2373 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2374 ret = ENODEV; 2375 } 2376 2377 return (ret); 2378 } 2379 2380 static void 2381 acpi_sleep_enable(void *arg) 2382 { 2383 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0; 2384 } 2385 2386 enum acpi_sleep_state { 2387 ACPI_SS_NONE, 2388 ACPI_SS_GPE_SET, 2389 ACPI_SS_DEV_SUSPEND, 2390 ACPI_SS_SLP_PREP, 2391 ACPI_SS_SLEPT, 2392 }; 2393 2394 /* 2395 * Enter the desired system sleep state. 2396 * 2397 * Currently we support S1-S5 but S4 is only S4BIOS 2398 */ 2399 static ACPI_STATUS 2400 acpi_EnterSleepState(struct acpi_softc *sc, int state) 2401 { 2402 ACPI_STATUS status; 2403 UINT8 TypeA; 2404 UINT8 TypeB; 2405 enum acpi_sleep_state slp_state; 2406 2407 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2408 2409 /* Re-entry once we're suspending is not allowed. */ 2410 status = AE_OK; 2411 ACPI_LOCK(acpi); 2412 if (sc->acpi_sleep_disabled) { 2413 ACPI_UNLOCK(acpi); 2414 device_printf(sc->acpi_dev, 2415 "suspend request ignored (not ready yet)\n"); 2416 return (AE_ERROR); 2417 } 2418 sc->acpi_sleep_disabled = 1; 2419 ACPI_UNLOCK(acpi); 2420 2421 /* 2422 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE 2423 * drivers need this. 2424 */ 2425 //get_mplock(); 2426 slp_state = ACPI_SS_NONE; 2427 switch (state) { 2428 case ACPI_STATE_S1: 2429 case ACPI_STATE_S2: 2430 case ACPI_STATE_S3: 2431 case ACPI_STATE_S4: 2432 status = AcpiGetSleepTypeData(state, &TypeA, &TypeB); 2433 if (status == AE_NOT_FOUND) { 2434 device_printf(sc->acpi_dev, 2435 "Sleep state S%d not supported by BIOS\n", state); 2436 break; 2437 } else if (ACPI_FAILURE(status)) { 2438 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n", 2439 AcpiFormatException(status)); 2440 break; 2441 } 2442 2443 sc->acpi_sstate = state; 2444 2445 /* Enable any GPEs as appropriate and requested by the user. */ 2446 acpi_wake_prep_walk(state); 2447 slp_state = ACPI_SS_GPE_SET; 2448 2449 /* 2450 * Inform all devices that we are going to sleep. If at least one 2451 * device fails, DEVICE_SUSPEND() automatically resumes the tree. 2452 * 2453 * XXX Note that a better two-pass approach with a 'veto' pass 2454 * followed by a "real thing" pass would be better, but the current 2455 * bus interface does not provide for this. 2456 */ 2457 if (DEVICE_SUSPEND(root_bus) != 0) { 2458 device_printf(sc->acpi_dev, "device_suspend failed\n"); 2459 break; 2460 } 2461 slp_state = ACPI_SS_DEV_SUSPEND; 2462 2463 /* If testing device suspend only, back out of everything here. */ 2464 if (acpi_susp_bounce) 2465 break; 2466 2467 status = AcpiEnterSleepStatePrep(state); 2468 if (ACPI_FAILURE(status)) { 2469 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2470 AcpiFormatException(status)); 2471 break; 2472 } 2473 slp_state = ACPI_SS_SLP_PREP; 2474 2475 if (sc->acpi_sleep_delay > 0) 2476 DELAY(sc->acpi_sleep_delay * 1000000); 2477 2478 if (state != ACPI_STATE_S1) { 2479 acpi_sleep_machdep(sc, state); 2480 2481 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 2482 if (state == ACPI_STATE_S4) 2483 AcpiEnable(); 2484 } else { 2485 ACPI_DISABLE_IRQS(); 2486 status = AcpiEnterSleepState(state); 2487 if (ACPI_FAILURE(status)) { 2488 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 2489 AcpiFormatException(status)); 2490 break; 2491 } 2492 } 2493 slp_state = ACPI_SS_SLEPT; 2494 break; 2495 case ACPI_STATE_S5: 2496 /* 2497 * Shut down cleanly and power off. This will call us back through the 2498 * shutdown handlers. 2499 */ 2500 shutdown_nice(RB_POWEROFF); 2501 break; 2502 case ACPI_STATE_S0: 2503 default: 2504 status = AE_BAD_PARAMETER; 2505 break; 2506 } 2507 2508 /* 2509 * Back out state according to how far along we got in the suspend 2510 * process. This handles both the error and success cases. 2511 */ 2512 sc->acpi_next_sstate = 0; 2513 if (slp_state >= ACPI_SS_GPE_SET) { 2514 acpi_wake_prep_walk(state); 2515 sc->acpi_sstate = ACPI_STATE_S0; 2516 } 2517 if (slp_state >= ACPI_SS_SLP_PREP) 2518 AcpiLeaveSleepState(state); 2519 if (slp_state >= ACPI_SS_DEV_SUSPEND) 2520 DEVICE_RESUME(root_bus); 2521 if (slp_state >= ACPI_SS_SLEPT) 2522 acpi_enable_fixed_events(sc); 2523 2524 /* Allow another sleep request after a while. */ 2525 /* XXX: needs timeout */ 2526 if (state != ACPI_STATE_S5) 2527 acpi_sleep_enable(sc); 2528 2529 /* Run /etc/rc.resume after we are back. */ 2530 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state); 2531 2532 //rel_mplock(); 2533 return_ACPI_STATUS (status); 2534 } 2535 2536 /* Enable or disable the device's GPE. */ 2537 int 2538 acpi_wake_set_enable(device_t dev, int enable) 2539 { 2540 struct acpi_prw_data prw; 2541 ACPI_STATUS status; 2542 int flags; 2543 2544 /* Make sure the device supports waking the system and get the GPE. */ 2545 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 2546 return (ENXIO); 2547 2548 flags = acpi_get_flags(dev); 2549 if (enable) { 2550 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 2551 ACPI_GPE_ENABLE); 2552 if (ACPI_FAILURE(status)) { 2553 device_printf(dev, "enable wake failed\n"); 2554 return (ENXIO); 2555 } 2556 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); 2557 } else { 2558 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 2559 ACPI_GPE_DISABLE); 2560 if (ACPI_FAILURE(status)) { 2561 device_printf(dev, "disable wake failed\n"); 2562 return (ENXIO); 2563 } 2564 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); 2565 } 2566 2567 return (0); 2568 } 2569 2570 static int 2571 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate) 2572 { 2573 struct acpi_prw_data prw; 2574 device_t dev; 2575 2576 /* Check that this is a wake-capable device and get its GPE. */ 2577 if (acpi_parse_prw(handle, &prw) != 0) 2578 return (ENXIO); 2579 dev = acpi_get_device(handle); 2580 2581 /* 2582 * The destination sleep state must be less than (i.e., higher power) 2583 * or equal to the value specified by _PRW. If this GPE cannot be 2584 * enabled for the next sleep state, then disable it. If it can and 2585 * the user requested it be enabled, turn on any required power resources 2586 * and set _PSW. 2587 */ 2588 if (sstate > prw.lowest_wake) { 2589 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_DISABLE); 2590 if (bootverbose) 2591 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n", 2592 acpi_name(handle), sstate); 2593 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) { 2594 acpi_pwr_wake_enable(handle, 1); 2595 acpi_SetInteger(handle, "_PSW", 1); 2596 if (bootverbose) 2597 device_printf(dev, "wake_prep enabled for %s (S%d)\n", 2598 acpi_name(handle), sstate); 2599 } 2600 2601 return (0); 2602 } 2603 2604 static int 2605 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate) 2606 { 2607 struct acpi_prw_data prw; 2608 device_t dev; 2609 2610 /* 2611 * Check that this is a wake-capable device and get its GPE. Return 2612 * now if the user didn't enable this device for wake. 2613 */ 2614 if (acpi_parse_prw(handle, &prw) != 0) 2615 return (ENXIO); 2616 dev = acpi_get_device(handle); 2617 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0) 2618 return (0); 2619 2620 /* 2621 * If this GPE couldn't be enabled for the previous sleep state, it was 2622 * disabled before going to sleep so re-enable it. If it was enabled, 2623 * clear _PSW and turn off any power resources it used. 2624 */ 2625 if (sstate > prw.lowest_wake) { 2626 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_ENABLE); 2627 if (bootverbose) 2628 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle)); 2629 } else { 2630 acpi_SetInteger(handle, "_PSW", 0); 2631 acpi_pwr_wake_enable(handle, 0); 2632 if (bootverbose) 2633 device_printf(dev, "run_prep cleaned up for %s\n", 2634 acpi_name(handle)); 2635 } 2636 2637 return (0); 2638 } 2639 2640 static ACPI_STATUS 2641 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 2642 { 2643 int sstate; 2644 2645 /* If suspending, run the sleep prep function, otherwise wake. */ 2646 sstate = *(int *)context; 2647 if (AcpiGbl_SystemAwakeAndRunning) 2648 acpi_wake_sleep_prep(handle, sstate); 2649 else 2650 acpi_wake_run_prep(handle, sstate); 2651 return (AE_OK); 2652 } 2653 2654 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */ 2655 static int 2656 acpi_wake_prep_walk(int sstate) 2657 { 2658 ACPI_HANDLE sb_handle; 2659 2660 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) { 2661 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100, 2662 acpi_wake_prep, NULL, &sstate, NULL); 2663 } 2664 return (0); 2665 } 2666 2667 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */ 2668 static int 2669 acpi_wake_sysctl_walk(device_t dev) 2670 { 2671 #ifdef notyet 2672 int error, i, numdevs; 2673 device_t *devlist; 2674 device_t child; 2675 ACPI_STATUS status; 2676 2677 error = device_get_children(dev, &devlist, &numdevs); 2678 if (error != 0 || numdevs == 0) { 2679 if (numdevs == 0) 2680 kfree(devlist, M_TEMP); 2681 return (error); 2682 } 2683 for (i = 0; i < numdevs; i++) { 2684 child = devlist[i]; 2685 acpi_wake_sysctl_walk(child); 2686 if (!device_is_attached(child)) 2687 continue; 2688 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL); 2689 if (ACPI_SUCCESS(status)) { 2690 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child), 2691 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO, 2692 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0, 2693 acpi_wake_set_sysctl, "I", "Device set to wake the system"); 2694 } 2695 } 2696 kfree(devlist, M_TEMP); 2697 #endif 2698 2699 return (0); 2700 } 2701 2702 #ifdef notyet 2703 /* Enable or disable wake from userland. */ 2704 static int 2705 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS) 2706 { 2707 int enable, error; 2708 device_t dev; 2709 2710 dev = (device_t)arg1; 2711 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0; 2712 2713 error = sysctl_handle_int(oidp, &enable, 0, req); 2714 if (error != 0 || req->newptr == NULL) 2715 return (error); 2716 if (enable != 0 && enable != 1) 2717 return (EINVAL); 2718 2719 return (acpi_wake_set_enable(dev, enable)); 2720 } 2721 #endif 2722 2723 /* Parse a device's _PRW into a structure. */ 2724 int 2725 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) 2726 { 2727 ACPI_STATUS status; 2728 ACPI_BUFFER prw_buffer; 2729 ACPI_OBJECT *res, *res2; 2730 int error, i, power_count; 2731 2732 if (h == NULL || prw == NULL) 2733 return (EINVAL); 2734 2735 /* 2736 * The _PRW object (7.2.9) is only required for devices that have the 2737 * ability to wake the system from a sleeping state. 2738 */ 2739 error = EINVAL; 2740 prw_buffer.Pointer = NULL; 2741 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 2742 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 2743 if (ACPI_FAILURE(status)) 2744 return (ENOENT); 2745 res = (ACPI_OBJECT *)prw_buffer.Pointer; 2746 if (res == NULL) 2747 return (ENOENT); 2748 if (!ACPI_PKG_VALID(res, 2)) 2749 goto out; 2750 2751 /* 2752 * Element 1 of the _PRW object: 2753 * The lowest power system sleeping state that can be entered while still 2754 * providing wake functionality. The sleeping state being entered must 2755 * be less than (i.e., higher power) or equal to this value. 2756 */ 2757 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) 2758 goto out; 2759 2760 /* 2761 * Element 0 of the _PRW object: 2762 */ 2763 switch (res->Package.Elements[0].Type) { 2764 case ACPI_TYPE_INTEGER: 2765 /* 2766 * If the data type of this package element is numeric, then this 2767 * _PRW package element is the bit index in the GPEx_EN, in the 2768 * GPE blocks described in the FADT, of the enable bit that is 2769 * enabled for the wake event. 2770 */ 2771 prw->gpe_handle = NULL; 2772 prw->gpe_bit = res->Package.Elements[0].Integer.Value; 2773 error = 0; 2774 break; 2775 case ACPI_TYPE_PACKAGE: 2776 /* 2777 * If the data type of this package element is a package, then this 2778 * _PRW package element is itself a package containing two 2779 * elements. The first is an object reference to the GPE Block 2780 * device that contains the GPE that will be triggered by the wake 2781 * event. The second element is numeric and it contains the bit 2782 * index in the GPEx_EN, in the GPE Block referenced by the 2783 * first element in the package, of the enable bit that is enabled for 2784 * the wake event. 2785 * 2786 * For example, if this field is a package then it is of the form: 2787 * Package() {\_SB.PCI0.ISA.GPE, 2} 2788 */ 2789 res2 = &res->Package.Elements[0]; 2790 if (!ACPI_PKG_VALID(res2, 2)) 2791 goto out; 2792 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 2793 if (prw->gpe_handle == NULL) 2794 goto out; 2795 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) 2796 goto out; 2797 error = 0; 2798 break; 2799 default: 2800 goto out; 2801 } 2802 2803 /* Elements 2 to N of the _PRW object are power resources. */ 2804 power_count = res->Package.Count - 2; 2805 if (power_count > ACPI_PRW_MAX_POWERRES) { 2806 kprintf("ACPI device %s has too many power resources\n", acpi_name(h)); 2807 power_count = 0; 2808 } 2809 prw->power_res_count = power_count; 2810 for (i = 0; i < power_count; i++) 2811 prw->power_res[i] = res->Package.Elements[i]; 2812 2813 out: 2814 if (prw_buffer.Pointer != NULL) 2815 AcpiOsFree(prw_buffer.Pointer); 2816 return (error); 2817 } 2818 2819 /* 2820 * ACPI Event Handlers 2821 */ 2822 2823 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 2824 2825 static void 2826 acpi_system_eventhandler_sleep(void *arg, int state) 2827 { 2828 struct acpi_softc *sc; 2829 int ret; 2830 2831 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2832 2833 sc = arg; 2834 2835 /* Check if button action is disabled. */ 2836 if (state == ACPI_S_STATES_MAX + 1) 2837 return; 2838 2839 /* Request that the system prepare to enter the given suspend state. */ 2840 ret = acpi_ReqSleepState((struct acpi_softc *)arg, state); 2841 if (ret != 0) 2842 device_printf(sc->acpi_dev, 2843 "request to enter state S%d failed (err %d)\n", state, ret); 2844 2845 return_VOID; 2846 } 2847 2848 static void 2849 acpi_system_eventhandler_wakeup(void *arg, int state) 2850 { 2851 2852 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2853 2854 /* Currently, nothing to do for wakeup. */ 2855 2856 return_VOID; 2857 } 2858 2859 /* 2860 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 2861 */ 2862 UINT32 2863 acpi_event_power_button_sleep(void *context) 2864 { 2865 struct acpi_softc *sc = (struct acpi_softc *)context; 2866 2867 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2868 2869 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 2870 2871 return_VALUE (ACPI_INTERRUPT_HANDLED); 2872 } 2873 2874 UINT32 2875 acpi_event_power_button_wake(void *context) 2876 { 2877 struct acpi_softc *sc = (struct acpi_softc *)context; 2878 2879 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2880 2881 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 2882 2883 return_VALUE (ACPI_INTERRUPT_HANDLED); 2884 } 2885 2886 UINT32 2887 acpi_event_sleep_button_sleep(void *context) 2888 { 2889 struct acpi_softc *sc = (struct acpi_softc *)context; 2890 2891 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2892 2893 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 2894 2895 return_VALUE (ACPI_INTERRUPT_HANDLED); 2896 } 2897 2898 UINT32 2899 acpi_event_sleep_button_wake(void *context) 2900 { 2901 struct acpi_softc *sc = (struct acpi_softc *)context; 2902 2903 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2904 2905 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 2906 2907 return_VALUE (ACPI_INTERRUPT_HANDLED); 2908 } 2909 2910 /* 2911 * XXX This static buffer is suboptimal. There is no locking so only 2912 * use this for single-threaded callers. 2913 */ 2914 char * 2915 acpi_name(ACPI_HANDLE handle) 2916 { 2917 ACPI_BUFFER buf; 2918 static char data[256]; 2919 2920 buf.Length = sizeof(data); 2921 buf.Pointer = data; 2922 2923 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf))) 2924 return (data); 2925 return ("(unknown)"); 2926 } 2927 2928 /* 2929 * Debugging/bug-avoidance. Avoid trying to fetch info on various 2930 * parts of the namespace. 2931 */ 2932 int 2933 acpi_avoid(ACPI_HANDLE handle) 2934 { 2935 char *cp, *env, *np; 2936 int len; 2937 2938 np = acpi_name(handle); 2939 if (*np == '\\') 2940 np++; 2941 if ((env = kgetenv("debug.acpi.avoid")) == NULL) 2942 return (0); 2943 2944 /* Scan the avoid list checking for a match */ 2945 cp = env; 2946 for (;;) { 2947 while (*cp != 0 && isspace(*cp)) 2948 cp++; 2949 if (*cp == 0) 2950 break; 2951 len = 0; 2952 while (cp[len] != 0 && !isspace(cp[len])) 2953 len++; 2954 if (!strncmp(cp, np, len)) { 2955 kfreeenv(env); 2956 return(1); 2957 } 2958 cp += len; 2959 } 2960 kfreeenv(env); 2961 2962 return (0); 2963 } 2964 2965 /* 2966 * Debugging/bug-avoidance. Disable ACPI subsystem components. 2967 */ 2968 int 2969 acpi_disabled(char *subsys) 2970 { 2971 char *cp, *env; 2972 int len; 2973 2974 if ((env = kgetenv("debug.acpi.disabled")) == NULL) 2975 return (0); 2976 if (strcmp(env, "all") == 0) { 2977 kfreeenv(env); 2978 return (1); 2979 } 2980 2981 /* Scan the disable list, checking for a match. */ 2982 cp = env; 2983 for (;;) { 2984 while (*cp != '\0' && isspace(*cp)) 2985 cp++; 2986 if (*cp == '\0') 2987 break; 2988 len = 0; 2989 while (cp[len] != '\0' && !isspace(cp[len])) 2990 len++; 2991 if (strncmp(cp, subsys, len) == 0) { 2992 kfreeenv(env); 2993 return (1); 2994 } 2995 cp += len; 2996 } 2997 kfreeenv(env); 2998 2999 return (0); 3000 } 3001 3002 /* 3003 * Debugging/bug-avoidance. Enable ACPI subsystem components. Most 3004 * components are enabled by default. The ones that are not have to be 3005 * enabled via debug.acpi.enabled. 3006 */ 3007 int 3008 acpi_enabled(char *subsys) 3009 { 3010 char *cp, *env; 3011 int len; 3012 3013 if ((env = kgetenv("debug.acpi.enabled")) == NULL) 3014 return (0); 3015 if (strcmp(env, "all") == 0) { 3016 kfreeenv(env); 3017 return (1); 3018 } 3019 3020 /* Scan the enable list, checking for a match. */ 3021 cp = env; 3022 for (;;) { 3023 while (*cp != '\0' && isspace(*cp)) 3024 cp++; 3025 if (*cp == '\0') 3026 break; 3027 len = 0; 3028 while (cp[len] != '\0' && !isspace(cp[len])) 3029 len++; 3030 if (strncmp(cp, subsys, len) == 0) { 3031 kfreeenv(env); 3032 return (1); 3033 } 3034 cp += len; 3035 } 3036 kfreeenv(env); 3037 3038 return (0); 3039 } 3040 3041 /* 3042 * Control interface. 3043 * 3044 * We multiplex ioctls for all participating ACPI devices here. Individual 3045 * drivers wanting to be accessible via /dev/acpi should use the 3046 * register/deregister interface to make their handlers visible. 3047 */ 3048 struct acpi_ioctl_hook 3049 { 3050 TAILQ_ENTRY(acpi_ioctl_hook) link; 3051 u_long cmd; 3052 acpi_ioctl_fn fn; 3053 void *arg; 3054 }; 3055 3056 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 3057 static int acpi_ioctl_hooks_initted; 3058 3059 int 3060 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 3061 { 3062 struct acpi_ioctl_hook *hp; 3063 3064 if ((hp = kmalloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 3065 return (ENOMEM); 3066 hp->cmd = cmd; 3067 hp->fn = fn; 3068 hp->arg = arg; 3069 3070 ACPI_LOCK(acpi); 3071 if (acpi_ioctl_hooks_initted == 0) { 3072 TAILQ_INIT(&acpi_ioctl_hooks); 3073 acpi_ioctl_hooks_initted = 1; 3074 } 3075 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 3076 ACPI_UNLOCK(acpi); 3077 3078 return (0); 3079 } 3080 3081 void 3082 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 3083 { 3084 struct acpi_ioctl_hook *hp; 3085 3086 ACPI_LOCK(acpi); 3087 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 3088 if (hp->cmd == cmd && hp->fn == fn) 3089 break; 3090 3091 if (hp != NULL) { 3092 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 3093 kfree(hp, M_ACPIDEV); 3094 } 3095 ACPI_UNLOCK(acpi); 3096 } 3097 3098 static int 3099 acpiopen(struct dev_open_args *ap) 3100 { 3101 return (0); 3102 } 3103 3104 static int 3105 acpiclose(struct dev_close_args *ap) 3106 { 3107 return (0); 3108 } 3109 3110 static int 3111 acpiioctl(struct dev_ioctl_args *ap) 3112 { 3113 struct acpi_softc *sc; 3114 struct acpi_ioctl_hook *hp; 3115 int error, state; 3116 3117 error = 0; 3118 hp = NULL; 3119 sc = ap->a_head.a_dev->si_drv1; 3120 3121 /* 3122 * Scan the list of registered ioctls, looking for handlers. 3123 */ 3124 ACPI_LOCK(acpi); 3125 if (acpi_ioctl_hooks_initted) 3126 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 3127 if (hp->cmd == ap->a_cmd) 3128 break; 3129 } 3130 ACPI_UNLOCK(acpi); 3131 if (hp) 3132 return (hp->fn(ap->a_cmd, ap->a_data, hp->arg)); 3133 3134 /* 3135 * Core ioctls are not permitted for non-writable user. 3136 * Currently, other ioctls just fetch information. 3137 * Not changing system behavior. 3138 */ 3139 if ((ap->a_fflag & FWRITE) == 0) 3140 return (EPERM); 3141 3142 /* Core system ioctls. */ 3143 switch (ap->a_cmd) { 3144 case ACPIIO_REQSLPSTATE: 3145 state = *(int *)ap->a_data; 3146 if (state != ACPI_STATE_S5) 3147 error = acpi_ReqSleepState(sc, state); 3148 else { 3149 device_printf(sc->acpi_dev, 3150 "power off via acpi ioctl not supported\n"); 3151 error = ENXIO; 3152 } 3153 break; 3154 case ACPIIO_ACKSLPSTATE: 3155 error = EOPNOTSUPP; 3156 #if 0 /* notyet */ 3157 error = *(int *)ap->a_data; 3158 error = acpi_AckSleepState(sc->acpi_clone, error); 3159 #endif 3160 break; 3161 case ACPIIO_SETSLPSTATE: /* DEPRECATED */ 3162 error = EINVAL; 3163 state = *(int *)ap->a_data; 3164 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 3165 if (ACPI_SUCCESS(acpi_SetSleepState(sc, state))) 3166 error = 0; 3167 break; 3168 default: 3169 error = ENXIO; 3170 break; 3171 } 3172 return (error); 3173 } 3174 3175 static int 3176 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3177 { 3178 int error; 3179 struct sbuf sb; 3180 UINT8 state, TypeA, TypeB; 3181 3182 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND); 3183 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX + 1; state++) 3184 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) 3185 sbuf_printf(&sb, "S%d ", state); 3186 sbuf_trim(&sb); 3187 sbuf_finish(&sb); 3188 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 3189 sbuf_delete(&sb); 3190 return (error); 3191 } 3192 3193 static int 3194 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3195 { 3196 char sleep_state[10]; 3197 int error; 3198 u_int new_state, old_state; 3199 3200 old_state = *(u_int *)oidp->oid_arg1; 3201 if (old_state > ACPI_S_STATES_MAX + 1) 3202 strlcpy(sleep_state, "unknown", sizeof(sleep_state)); 3203 else 3204 strlcpy(sleep_state, sleep_state_names[old_state], sizeof(sleep_state)); 3205 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 3206 if (error == 0 && req->newptr != NULL) { 3207 new_state = ACPI_STATE_S0; 3208 for (; new_state <= ACPI_S_STATES_MAX + 1; new_state++) 3209 if (strcmp(sleep_state, sleep_state_names[new_state]) == 0) 3210 break; 3211 if (new_state <= ACPI_S_STATES_MAX + 1) { 3212 if (new_state != old_state) 3213 *(u_int *)oidp->oid_arg1 = new_state; 3214 } else 3215 error = EINVAL; 3216 } 3217 3218 return (error); 3219 } 3220 3221 /* Inform devctl(4) when we receive a Notify. */ 3222 void 3223 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 3224 { 3225 char notify_buf[16]; 3226 ACPI_BUFFER handle_buf; 3227 ACPI_STATUS status; 3228 3229 if (subsystem == NULL) 3230 return; 3231 3232 handle_buf.Pointer = NULL; 3233 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 3234 status = AcpiNsHandleToPathname(h, &handle_buf); 3235 if (ACPI_FAILURE(status)) 3236 return; 3237 ksnprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 3238 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 3239 AcpiOsFree(handle_buf.Pointer); 3240 } 3241 3242 #ifdef ACPI_DEBUG 3243 /* 3244 * Support for parsing debug options from the kernel environment. 3245 * 3246 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 3247 * by specifying the names of the bits in the debug.acpi.layer and 3248 * debug.acpi.level environment variables. Bits may be unset by 3249 * prefixing the bit name with !. 3250 */ 3251 struct debugtag 3252 { 3253 char *name; 3254 UINT32 value; 3255 }; 3256 3257 static struct debugtag dbg_layer[] = { 3258 {"ACPI_UTILITIES", ACPI_UTILITIES}, 3259 {"ACPI_HARDWARE", ACPI_HARDWARE}, 3260 {"ACPI_EVENTS", ACPI_EVENTS}, 3261 {"ACPI_TABLES", ACPI_TABLES}, 3262 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 3263 {"ACPI_PARSER", ACPI_PARSER}, 3264 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 3265 {"ACPI_EXECUTER", ACPI_EXECUTER}, 3266 {"ACPI_RESOURCES", ACPI_RESOURCES}, 3267 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 3268 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 3269 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 3270 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 3271 3272 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 3273 {"ACPI_BATTERY", ACPI_BATTERY}, 3274 {"ACPI_BUS", ACPI_BUS}, 3275 {"ACPI_BUTTON", ACPI_BUTTON}, 3276 {"ACPI_EC", ACPI_EC}, 3277 {"ACPI_FAN", ACPI_FAN}, 3278 {"ACPI_POWERRES", ACPI_POWERRES}, 3279 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 3280 {"ACPI_THERMAL", ACPI_THERMAL}, 3281 {"ACPI_TIMER", ACPI_TIMER}, 3282 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 3283 {NULL, 0} 3284 }; 3285 3286 static struct debugtag dbg_level[] = { 3287 {"ACPI_LV_INIT", ACPI_LV_INIT}, 3288 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 3289 {"ACPI_LV_INFO", ACPI_LV_INFO}, 3290 {"ACPI_LV_REPAIR", ACPI_LV_REPAIR}, 3291 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 3292 3293 /* Trace verbosity level 1 [Standard Trace Level] */ 3294 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 3295 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 3296 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 3297 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 3298 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 3299 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 3300 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 3301 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 3302 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 3303 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 3304 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 3305 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 3306 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 3307 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 3308 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 3309 3310 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 3311 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 3312 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 3313 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 3314 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 3315 {"ACPI_LV_ALL", ACPI_LV_ALL}, 3316 3317 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 3318 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 3319 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 3320 {"ACPI_LV_IO", ACPI_LV_IO}, 3321 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 3322 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 3323 3324 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 3325 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 3326 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 3327 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 3328 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 3329 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 3330 {NULL, 0} 3331 }; 3332 3333 static void 3334 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 3335 { 3336 char *ep; 3337 int i, l; 3338 int set; 3339 3340 while (*cp) { 3341 if (isspace(*cp)) { 3342 cp++; 3343 continue; 3344 } 3345 ep = cp; 3346 while (*ep && !isspace(*ep)) 3347 ep++; 3348 if (*cp == '!') { 3349 set = 0; 3350 cp++; 3351 if (cp == ep) 3352 continue; 3353 } else { 3354 set = 1; 3355 } 3356 l = ep - cp; 3357 for (i = 0; tag[i].name != NULL; i++) { 3358 if (!strncmp(cp, tag[i].name, l)) { 3359 if (set) 3360 *flag |= tag[i].value; 3361 else 3362 *flag &= ~tag[i].value; 3363 } 3364 } 3365 cp = ep; 3366 } 3367 } 3368 3369 static void 3370 acpi_set_debugging(void *junk) 3371 { 3372 char *layer, *level; 3373 3374 if (cold) { 3375 AcpiDbgLayer = 0; 3376 AcpiDbgLevel = 0; 3377 } 3378 3379 layer = kgetenv("debug.acpi.layer"); 3380 level = kgetenv("debug.acpi.level"); 3381 if (layer == NULL && level == NULL) 3382 return; 3383 3384 kprintf("ACPI set debug"); 3385 if (layer != NULL) { 3386 if (strcmp("NONE", layer) != 0) 3387 kprintf(" layer '%s'", layer); 3388 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer); 3389 kfreeenv(layer); 3390 } 3391 if (level != NULL) { 3392 if (strcmp("NONE", level) != 0) 3393 kprintf(" level '%s'", level); 3394 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel); 3395 kfreeenv(level); 3396 } 3397 kprintf("\n"); 3398 } 3399 3400 SYSINIT(acpi_debugging, SI_BOOT1_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 3401 NULL); 3402 3403 static int 3404 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 3405 { 3406 int error, *dbg; 3407 struct debugtag *tag; 3408 struct sbuf sb; 3409 3410 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 3411 return (ENOMEM); 3412 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 3413 tag = &dbg_layer[0]; 3414 dbg = &AcpiDbgLayer; 3415 } else { 3416 tag = &dbg_level[0]; 3417 dbg = &AcpiDbgLevel; 3418 } 3419 3420 /* Get old values if this is a get request. */ 3421 ACPI_SERIAL_BEGIN(acpi); 3422 if (*dbg == 0) { 3423 sbuf_cpy(&sb, "NONE"); 3424 } else if (req->newptr == NULL) { 3425 for (; tag->name != NULL; tag++) { 3426 if ((*dbg & tag->value) == tag->value) 3427 sbuf_printf(&sb, "%s ", tag->name); 3428 } 3429 } 3430 sbuf_trim(&sb); 3431 sbuf_finish(&sb); 3432 3433 /* Copy out the old values to the user. */ 3434 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb)); 3435 sbuf_delete(&sb); 3436 3437 /* If the user is setting a string, parse it. */ 3438 if (error == 0 && req->newptr != NULL) { 3439 *dbg = 0; 3440 ksetenv((char *)oidp->oid_arg1, (char *)req->newptr); 3441 acpi_set_debugging(NULL); 3442 } 3443 ACPI_SERIAL_END(acpi); 3444 3445 return (error); 3446 } 3447 3448 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 3449 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 3450 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 3451 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 3452 #endif /* ACPI_DEBUG */ 3453 3454 static int 3455 acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS) 3456 { 3457 int error; 3458 int old; 3459 3460 old = acpi_debug_objects; 3461 error = sysctl_handle_int(oidp, &acpi_debug_objects, 0, req); 3462 if (error != 0 || req->newptr == NULL) 3463 return (error); 3464 if (old == acpi_debug_objects || (old && acpi_debug_objects)) 3465 return (0); 3466 3467 ACPI_SERIAL_BEGIN(acpi); 3468 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE; 3469 ACPI_SERIAL_END(acpi); 3470 3471 return (0); 3472 } 3473 3474 3475 static int 3476 acpi_parse_interfaces(char *str, struct acpi_interface *iface) 3477 { 3478 char *p; 3479 size_t len; 3480 int i, j; 3481 3482 p = str; 3483 while (isspace(*p) || *p == ',') 3484 p++; 3485 len = strlen(p); 3486 if (len == 0) 3487 return (0); 3488 p = kstrdup(p, M_TEMP); 3489 for (i = 0; i < len; i++) 3490 if (p[i] == ',') 3491 p[i] = '\0'; 3492 i = j = 0; 3493 while (i < len) 3494 if (isspace(p[i]) || p[i] == '\0') 3495 i++; 3496 else { 3497 i += strlen(p + i) + 1; 3498 j++; 3499 } 3500 if (j == 0) { 3501 kfree(p, M_TEMP); 3502 return (0); 3503 } 3504 iface->data = kmalloc(sizeof(*iface->data) * j, M_TEMP, M_WAITOK); 3505 iface->num = j; 3506 i = j = 0; 3507 while (i < len) 3508 if (isspace(p[i]) || p[i] == '\0') 3509 i++; 3510 else { 3511 iface->data[j] = p + i; 3512 i += strlen(p + i) + 1; 3513 j++; 3514 } 3515 3516 return (j); 3517 } 3518 3519 static void 3520 acpi_free_interfaces(struct acpi_interface *iface) 3521 { 3522 kfree(iface->data[0], M_TEMP); 3523 kfree(iface->data, M_TEMP); 3524 } 3525 3526 static void 3527 acpi_reset_interfaces(device_t dev) 3528 { 3529 struct acpi_interface list; 3530 ACPI_STATUS status; 3531 int i; 3532 3533 if (acpi_parse_interfaces(acpi_install_interface, &list) > 0) { 3534 for (i = 0; i < list.num; i++) { 3535 status = AcpiInstallInterface(list.data[i]); 3536 if (ACPI_FAILURE(status)) 3537 device_printf(dev, 3538 "failed to install _OSI(\"%s\"): %s\n", 3539 list.data[i], AcpiFormatException(status)); 3540 else if (bootverbose) 3541 device_printf(dev, "installed _OSI(\"%s\")\n", 3542 list.data[i]); 3543 } 3544 acpi_free_interfaces(&list); 3545 } 3546 if (acpi_parse_interfaces(acpi_remove_interface, &list) > 0) { 3547 for (i = 0; i < list.num; i++) { 3548 status = AcpiRemoveInterface(list.data[i]); 3549 if (ACPI_FAILURE(status)) 3550 device_printf(dev, 3551 "failed to remove _OSI(\"%s\"): %s\n", 3552 list.data[i], AcpiFormatException(status)); 3553 else if (bootverbose) 3554 device_printf(dev, "removed _OSI(\"%s\")\n", 3555 list.data[i]); 3556 } 3557 acpi_free_interfaces(&list); 3558 } 3559 } 3560 3561 static int 3562 acpi_pm_func(u_long cmd, void *arg, ...) 3563 { 3564 int state, acpi_state; 3565 int error; 3566 struct acpi_softc *sc; 3567 va_list ap; 3568 3569 error = 0; 3570 switch (cmd) { 3571 case POWER_CMD_SUSPEND: 3572 sc = (struct acpi_softc *)arg; 3573 if (sc == NULL) { 3574 error = EINVAL; 3575 goto out; 3576 } 3577 3578 va_start(ap, arg); 3579 state = va_arg(ap, int); 3580 va_end(ap); 3581 3582 switch (state) { 3583 case POWER_SLEEP_STATE_STANDBY: 3584 acpi_state = sc->acpi_standby_sx; 3585 break; 3586 case POWER_SLEEP_STATE_SUSPEND: 3587 acpi_state = sc->acpi_suspend_sx; 3588 break; 3589 case POWER_SLEEP_STATE_HIBERNATE: 3590 acpi_state = ACPI_STATE_S4; 3591 break; 3592 default: 3593 error = EINVAL; 3594 goto out; 3595 } 3596 3597 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state))) 3598 error = ENXIO; 3599 break; 3600 default: 3601 error = EINVAL; 3602 goto out; 3603 } 3604 3605 out: 3606 return (error); 3607 } 3608 3609 static void 3610 acpi_pm_register(void *arg) 3611 { 3612 if (!cold || resource_disabled("acpi", 0)) 3613 return; 3614 3615 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 3616 } 3617 3618 SYSINIT(power, SI_BOOT2_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 3619