1 /*- 2 * Copyright (c) 2000 Takanori Watanabe <takawata@jp.freebsd.org> 3 * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.freebsd.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 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include "opt_acpi.h" 34 #include <sys/param.h> 35 #include <sys/kernel.h> 36 #include <sys/proc.h> 37 #include <sys/fcntl.h> 38 #include <sys/malloc.h> 39 #include <sys/module.h> 40 #include <sys/bus.h> 41 #include <sys/conf.h> 42 #include <sys/ioccom.h> 43 #include <sys/reboot.h> 44 #include <sys/sysctl.h> 45 #include <sys/ctype.h> 46 #include <sys/linker.h> 47 #include <sys/power.h> 48 #include <sys/sbuf.h> 49 #include <sys/sched.h> 50 #include <sys/smp.h> 51 #include <sys/timetc.h> 52 53 #if defined(__i386__) || defined(__amd64__) 54 #include <machine/pci_cfgreg.h> 55 #endif 56 #include <machine/resource.h> 57 #include <machine/bus.h> 58 #include <sys/rman.h> 59 #include <isa/isavar.h> 60 #include <isa/pnpvar.h> 61 62 #include <contrib/dev/acpica/include/acpi.h> 63 #include <contrib/dev/acpica/include/accommon.h> 64 #include <contrib/dev/acpica/include/acnamesp.h> 65 66 #include <dev/acpica/acpivar.h> 67 #include <dev/acpica/acpiio.h> 68 69 #include "pci_if.h" 70 #include <dev/pci/pcivar.h> 71 #include <dev/pci/pci_private.h> 72 73 #include <vm/vm_param.h> 74 75 MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 76 77 /* Hooks for the ACPI CA debugging infrastructure */ 78 #define _COMPONENT ACPI_BUS 79 ACPI_MODULE_NAME("ACPI") 80 81 static d_open_t acpiopen; 82 static d_close_t acpiclose; 83 static d_ioctl_t acpiioctl; 84 85 static struct cdevsw acpi_cdevsw = { 86 .d_version = D_VERSION, 87 .d_open = acpiopen, 88 .d_close = acpiclose, 89 .d_ioctl = acpiioctl, 90 .d_name = "acpi", 91 }; 92 93 /* Global mutex for locking access to the ACPI subsystem. */ 94 struct mtx acpi_mutex; 95 96 /* Bitmap of device quirks. */ 97 int acpi_quirks; 98 99 /* Supported sleep states. */ 100 static BOOLEAN acpi_sleep_states[ACPI_S_STATE_COUNT]; 101 102 static int acpi_modevent(struct module *mod, int event, void *junk); 103 static int acpi_probe(device_t dev); 104 static int acpi_attach(device_t dev); 105 static int acpi_suspend(device_t dev); 106 static int acpi_resume(device_t dev); 107 static int acpi_shutdown(device_t dev); 108 static device_t acpi_add_child(device_t bus, u_int order, const char *name, 109 int unit); 110 static int acpi_print_child(device_t bus, device_t child); 111 static void acpi_probe_nomatch(device_t bus, device_t child); 112 static void acpi_driver_added(device_t dev, driver_t *driver); 113 static int acpi_read_ivar(device_t dev, device_t child, int index, 114 uintptr_t *result); 115 static int acpi_write_ivar(device_t dev, device_t child, int index, 116 uintptr_t value); 117 static struct resource_list *acpi_get_rlist(device_t dev, device_t child); 118 static int acpi_sysres_alloc(device_t dev); 119 static struct resource *acpi_alloc_resource(device_t bus, device_t child, 120 int type, int *rid, u_long start, u_long end, 121 u_long count, u_int flags); 122 static int acpi_release_resource(device_t bus, device_t child, int type, 123 int rid, struct resource *r); 124 static void acpi_delete_resource(device_t bus, device_t child, int type, 125 int rid); 126 static uint32_t acpi_isa_get_logicalid(device_t dev); 127 static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count); 128 static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids); 129 static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev, 130 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters, 131 ACPI_BUFFER *ret); 132 static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, 133 void *context, void **retval); 134 static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev, 135 int max_depth, acpi_scan_cb_t user_fn, void *arg); 136 static int acpi_set_powerstate_method(device_t bus, device_t child, 137 int state); 138 static int acpi_isa_pnp_probe(device_t bus, device_t child, 139 struct isa_pnp_id *ids); 140 static void acpi_probe_children(device_t bus); 141 static void acpi_probe_order(ACPI_HANDLE handle, int *order); 142 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, 143 void *context, void **status); 144 static void acpi_sleep_enable(void *arg); 145 static ACPI_STATUS acpi_sleep_disable(struct acpi_softc *sc); 146 static ACPI_STATUS acpi_EnterSleepState(struct acpi_softc *sc, int state); 147 static void acpi_shutdown_final(void *arg, int howto); 148 static void acpi_enable_fixed_events(struct acpi_softc *sc); 149 static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate); 150 static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate); 151 static int acpi_wake_prep_walk(int sstate); 152 static int acpi_wake_sysctl_walk(device_t dev); 153 static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS); 154 static void acpi_system_eventhandler_sleep(void *arg, int state); 155 static void acpi_system_eventhandler_wakeup(void *arg, int state); 156 static int acpi_sname2sstate(const char *sname); 157 static const char *acpi_sstate2sname(int sstate); 158 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 159 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 160 static int acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS); 161 static int acpi_pm_func(u_long cmd, void *arg, ...); 162 static int acpi_child_location_str_method(device_t acdev, device_t child, 163 char *buf, size_t buflen); 164 static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child, 165 char *buf, size_t buflen); 166 #if defined(__i386__) || defined(__amd64__) 167 static void acpi_enable_pcie(void); 168 #endif 169 static void acpi_hint_device_unit(device_t acdev, device_t child, 170 const char *name, int *unitp); 171 172 static device_method_t acpi_methods[] = { 173 /* Device interface */ 174 DEVMETHOD(device_probe, acpi_probe), 175 DEVMETHOD(device_attach, acpi_attach), 176 DEVMETHOD(device_shutdown, acpi_shutdown), 177 DEVMETHOD(device_detach, bus_generic_detach), 178 DEVMETHOD(device_suspend, acpi_suspend), 179 DEVMETHOD(device_resume, acpi_resume), 180 181 /* Bus interface */ 182 DEVMETHOD(bus_add_child, acpi_add_child), 183 DEVMETHOD(bus_print_child, acpi_print_child), 184 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch), 185 DEVMETHOD(bus_driver_added, acpi_driver_added), 186 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 187 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 188 DEVMETHOD(bus_get_resource_list, acpi_get_rlist), 189 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 190 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 191 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 192 DEVMETHOD(bus_release_resource, acpi_release_resource), 193 DEVMETHOD(bus_delete_resource, acpi_delete_resource), 194 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method), 195 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method), 196 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 197 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 198 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 199 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 200 DEVMETHOD(bus_hint_device_unit, acpi_hint_device_unit), 201 202 /* ACPI bus */ 203 DEVMETHOD(acpi_id_probe, acpi_device_id_probe), 204 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj), 205 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep), 206 DEVMETHOD(acpi_scan_children, acpi_device_scan_children), 207 208 /* PCI emulation */ 209 DEVMETHOD(pci_set_powerstate, acpi_set_powerstate_method), 210 211 /* ISA emulation */ 212 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 213 214 {0, 0} 215 }; 216 217 static driver_t acpi_driver = { 218 "acpi", 219 acpi_methods, 220 sizeof(struct acpi_softc), 221 }; 222 223 static devclass_t acpi_devclass; 224 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0); 225 MODULE_VERSION(acpi, 1); 226 227 ACPI_SERIAL_DECL(acpi, "ACPI root bus"); 228 229 /* Local pools for managing system resources for ACPI child devices. */ 230 static struct rman acpi_rman_io, acpi_rman_mem; 231 232 #define ACPI_MINIMUM_AWAKETIME 5 233 234 /* Holds the description of the acpi0 device. */ 235 static char acpi_desc[ACPI_OEM_ID_SIZE + ACPI_OEM_TABLE_ID_SIZE + 2]; 236 237 SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging"); 238 static char acpi_ca_version[12]; 239 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, 240 acpi_ca_version, 0, "Version of Intel ACPI-CA"); 241 242 /* 243 * Allow override of whether methods execute in parallel or not. 244 * Enable this for serial behavior, which fixes "AE_ALREADY_EXISTS" 245 * errors for AML that really can't handle parallel method execution. 246 * It is off by default since this breaks recursive methods and 247 * some IBMs use such code. 248 */ 249 static int acpi_serialize_methods; 250 TUNABLE_INT("hw.acpi.serialize_methods", &acpi_serialize_methods); 251 252 /* Allow users to dump Debug objects without ACPI debugger. */ 253 static int acpi_debug_objects; 254 TUNABLE_INT("debug.acpi.enable_debug_objects", &acpi_debug_objects); 255 SYSCTL_PROC(_debug_acpi, OID_AUTO, enable_debug_objects, 256 CTLFLAG_RW | CTLTYPE_INT, NULL, 0, acpi_debug_objects_sysctl, "I", 257 "Enable Debug objects"); 258 259 /* Allow the interpreter to ignore common mistakes in BIOS. */ 260 static int acpi_interpreter_slack = 1; 261 TUNABLE_INT("debug.acpi.interpreter_slack", &acpi_interpreter_slack); 262 SYSCTL_INT(_debug_acpi, OID_AUTO, interpreter_slack, CTLFLAG_RDTUN, 263 &acpi_interpreter_slack, 1, "Turn on interpreter slack mode."); 264 265 /* Power devices off and on in suspend and resume. XXX Remove once tested. */ 266 static int acpi_do_powerstate = 1; 267 TUNABLE_INT("debug.acpi.do_powerstate", &acpi_do_powerstate); 268 SYSCTL_INT(_debug_acpi, OID_AUTO, do_powerstate, CTLFLAG_RW, 269 &acpi_do_powerstate, 1, "Turn off devices when suspending."); 270 271 /* Reset system clock while resuming. XXX Remove once tested. */ 272 static int acpi_reset_clock = 1; 273 TUNABLE_INT("debug.acpi.reset_clock", &acpi_reset_clock); 274 SYSCTL_INT(_debug_acpi, OID_AUTO, reset_clock, CTLFLAG_RW, 275 &acpi_reset_clock, 1, "Reset system clock while resuming."); 276 277 /* Allow users to override quirks. */ 278 TUNABLE_INT("debug.acpi.quirks", &acpi_quirks); 279 280 static int acpi_susp_bounce; 281 SYSCTL_INT(_debug_acpi, OID_AUTO, suspend_bounce, CTLFLAG_RW, 282 &acpi_susp_bounce, 0, "Don't actually suspend, just test devices."); 283 284 /* 285 * ACPI can only be loaded as a module by the loader; activating it after 286 * system bootstrap time is not useful, and can be fatal to the system. 287 * It also cannot be unloaded, since the entire system bus hierarchy hangs 288 * off it. 289 */ 290 static int 291 acpi_modevent(struct module *mod, int event, void *junk) 292 { 293 switch (event) { 294 case MOD_LOAD: 295 if (!cold) { 296 printf("The ACPI driver cannot be loaded after boot.\n"); 297 return (EPERM); 298 } 299 break; 300 case MOD_UNLOAD: 301 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 302 return (EBUSY); 303 break; 304 default: 305 break; 306 } 307 return (0); 308 } 309 310 /* 311 * Perform early initialization. 312 */ 313 ACPI_STATUS 314 acpi_Startup(void) 315 { 316 static int started = 0; 317 ACPI_STATUS status; 318 int val; 319 320 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 321 322 /* Only run the startup code once. The MADT driver also calls this. */ 323 if (started) 324 return_VALUE (AE_OK); 325 started = 1; 326 327 /* 328 * Pre-allocate space for RSDT/XSDT and DSDT tables and allow resizing 329 * if more tables exist. 330 */ 331 if (ACPI_FAILURE(status = AcpiInitializeTables(NULL, 2, TRUE))) { 332 printf("ACPI: Table initialisation failed: %s\n", 333 AcpiFormatException(status)); 334 return_VALUE (status); 335 } 336 337 /* Set up any quirks we have for this system. */ 338 if (acpi_quirks == ACPI_Q_OK) 339 acpi_table_quirks(&acpi_quirks); 340 341 /* If the user manually set the disabled hint to 0, force-enable ACPI. */ 342 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0) 343 acpi_quirks &= ~ACPI_Q_BROKEN; 344 if (acpi_quirks & ACPI_Q_BROKEN) { 345 printf("ACPI disabled by blacklist. Contact your BIOS vendor.\n"); 346 status = AE_SUPPORT; 347 } 348 349 return_VALUE (status); 350 } 351 352 /* 353 * Detect ACPI and perform early initialisation. 354 */ 355 int 356 acpi_identify(void) 357 { 358 ACPI_TABLE_RSDP *rsdp; 359 ACPI_TABLE_HEADER *rsdt; 360 ACPI_PHYSICAL_ADDRESS paddr; 361 struct sbuf sb; 362 363 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 364 365 if (!cold) 366 return (ENXIO); 367 368 /* Check that we haven't been disabled with a hint. */ 369 if (resource_disabled("acpi", 0)) 370 return (ENXIO); 371 372 /* Check for other PM systems. */ 373 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 374 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 375 printf("ACPI identify failed, other PM system enabled.\n"); 376 return (ENXIO); 377 } 378 379 /* Initialize root tables. */ 380 if (ACPI_FAILURE(acpi_Startup())) { 381 printf("ACPI: Try disabling either ACPI or apic support.\n"); 382 return (ENXIO); 383 } 384 385 if ((paddr = AcpiOsGetRootPointer()) == 0 || 386 (rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP))) == NULL) 387 return (ENXIO); 388 if (rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress != 0) 389 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress; 390 else 391 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress; 392 AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP)); 393 394 if ((rsdt = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER))) == NULL) 395 return (ENXIO); 396 sbuf_new(&sb, acpi_desc, sizeof(acpi_desc), SBUF_FIXEDLEN); 397 sbuf_bcat(&sb, rsdt->OemId, ACPI_OEM_ID_SIZE); 398 sbuf_trim(&sb); 399 sbuf_putc(&sb, ' '); 400 sbuf_bcat(&sb, rsdt->OemTableId, ACPI_OEM_TABLE_ID_SIZE); 401 sbuf_trim(&sb); 402 sbuf_finish(&sb); 403 sbuf_delete(&sb); 404 AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER)); 405 406 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%x", ACPI_CA_VERSION); 407 408 return (0); 409 } 410 411 /* 412 * Fetch some descriptive data from ACPI to put in our attach message. 413 */ 414 static int 415 acpi_probe(device_t dev) 416 { 417 418 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 419 420 device_set_desc(dev, acpi_desc); 421 422 return_VALUE (0); 423 } 424 425 static int 426 acpi_attach(device_t dev) 427 { 428 struct acpi_softc *sc; 429 ACPI_STATUS status; 430 int error, state; 431 UINT32 flags; 432 UINT8 TypeA, TypeB; 433 char *env; 434 435 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 436 437 sc = device_get_softc(dev); 438 sc->acpi_dev = dev; 439 callout_init(&sc->susp_force_to, TRUE); 440 441 error = ENXIO; 442 443 /* Initialize resource manager. */ 444 acpi_rman_io.rm_type = RMAN_ARRAY; 445 acpi_rman_io.rm_start = 0; 446 acpi_rman_io.rm_end = 0xffff; 447 acpi_rman_io.rm_descr = "ACPI I/O ports"; 448 if (rman_init(&acpi_rman_io) != 0) 449 panic("acpi rman_init IO ports failed"); 450 acpi_rman_mem.rm_type = RMAN_ARRAY; 451 acpi_rman_mem.rm_start = 0; 452 acpi_rman_mem.rm_end = ~0ul; 453 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses"; 454 if (rman_init(&acpi_rman_mem) != 0) 455 panic("acpi rman_init memory failed"); 456 457 /* Initialise the ACPI mutex */ 458 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF); 459 460 /* 461 * Set the globals from our tunables. This is needed because ACPI-CA 462 * uses UINT8 for some values and we have no tunable_byte. 463 */ 464 AcpiGbl_AllMethodsSerialized = acpi_serialize_methods ? TRUE : FALSE; 465 AcpiGbl_EnableInterpreterSlack = acpi_interpreter_slack ? TRUE : FALSE; 466 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE; 467 468 #ifndef ACPI_DEBUG 469 /* 470 * Disable all debugging layers and levels. 471 */ 472 AcpiDbgLayer = 0; 473 AcpiDbgLevel = 0; 474 #endif 475 476 /* Start up the ACPI CA subsystem. */ 477 status = AcpiInitializeSubsystem(); 478 if (ACPI_FAILURE(status)) { 479 device_printf(dev, "Could not initialize Subsystem: %s\n", 480 AcpiFormatException(status)); 481 goto out; 482 } 483 484 /* Load ACPI name space. */ 485 status = AcpiLoadTables(); 486 if (ACPI_FAILURE(status)) { 487 device_printf(dev, "Could not load Namespace: %s\n", 488 AcpiFormatException(status)); 489 goto out; 490 } 491 492 #if defined(__i386__) || defined(__amd64__) 493 /* Handle MCFG table if present. */ 494 acpi_enable_pcie(); 495 #endif 496 497 /* Install the default address space handlers. */ 498 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 499 ACPI_ADR_SPACE_SYSTEM_MEMORY, ACPI_DEFAULT_HANDLER, NULL, NULL); 500 if (ACPI_FAILURE(status)) { 501 device_printf(dev, "Could not initialise SystemMemory handler: %s\n", 502 AcpiFormatException(status)); 503 goto out; 504 } 505 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 506 ACPI_ADR_SPACE_SYSTEM_IO, ACPI_DEFAULT_HANDLER, NULL, NULL); 507 if (ACPI_FAILURE(status)) { 508 device_printf(dev, "Could not initialise SystemIO handler: %s\n", 509 AcpiFormatException(status)); 510 goto out; 511 } 512 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 513 ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL); 514 if (ACPI_FAILURE(status)) { 515 device_printf(dev, "could not initialise PciConfig handler: %s\n", 516 AcpiFormatException(status)); 517 goto out; 518 } 519 520 /* 521 * Note that some systems (specifically, those with namespace evaluation 522 * issues that require the avoidance of parts of the namespace) must 523 * avoid running _INI and _STA on everything, as well as dodging the final 524 * object init pass. 525 * 526 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 527 * 528 * XXX We should arrange for the object init pass after we have attached 529 * all our child devices, but on many systems it works here. 530 */ 531 flags = 0; 532 if (testenv("debug.acpi.avoid")) 533 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 534 535 /* Bring the hardware and basic handlers online. */ 536 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 537 device_printf(dev, "Could not enable ACPI: %s\n", 538 AcpiFormatException(status)); 539 goto out; 540 } 541 542 /* 543 * Call the ECDT probe function to provide EC functionality before 544 * the namespace has been evaluated. 545 * 546 * XXX This happens before the sysresource devices have been probed and 547 * attached so its resources come from nexus0. In practice, this isn't 548 * a problem but should be addressed eventually. 549 */ 550 acpi_ec_ecdt_probe(dev); 551 552 /* Bring device objects and regions online. */ 553 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 554 device_printf(dev, "Could not initialize ACPI objects: %s\n", 555 AcpiFormatException(status)); 556 goto out; 557 } 558 559 /* 560 * Setup our sysctl tree. 561 * 562 * XXX: This doesn't check to make sure that none of these fail. 563 */ 564 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 565 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 566 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 567 device_get_name(dev), CTLFLAG_RD, 0, ""); 568 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 569 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 570 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 571 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 572 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 573 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 574 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 575 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 576 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 577 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 578 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 579 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 580 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 581 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 582 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 583 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 584 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 585 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 586 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 587 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0, 588 "sleep delay"); 589 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 590 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode"); 591 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 592 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode"); 593 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 594 OID_AUTO, "disable_on_reboot", CTLFLAG_RW, 595 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system"); 596 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 597 OID_AUTO, "handle_reboot", CTLFLAG_RW, 598 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot"); 599 600 /* 601 * Default to 1 second before sleeping to give some machines time to 602 * stabilize. 603 */ 604 sc->acpi_sleep_delay = 1; 605 if (bootverbose) 606 sc->acpi_verbose = 1; 607 if ((env = getenv("hw.acpi.verbose")) != NULL) { 608 if (strcmp(env, "0") != 0) 609 sc->acpi_verbose = 1; 610 freeenv(env); 611 } 612 613 /* Only enable S4BIOS by default if the FACS says it is available. */ 614 if (AcpiGbl_FACS->Flags & ACPI_FACS_S4_BIOS_PRESENT) 615 sc->acpi_s4bios = 1; 616 617 /* Probe all supported sleep states. */ 618 acpi_sleep_states[ACPI_STATE_S0] = TRUE; 619 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++) 620 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) 621 acpi_sleep_states[state] = TRUE; 622 623 /* 624 * Dispatch the default sleep state to devices. The lid switch is set 625 * to UNKNOWN by default to avoid surprising users. 626 */ 627 sc->acpi_power_button_sx = acpi_sleep_states[ACPI_STATE_S5] ? 628 ACPI_STATE_S5 : ACPI_STATE_UNKNOWN; 629 sc->acpi_lid_switch_sx = ACPI_STATE_UNKNOWN; 630 sc->acpi_standby_sx = acpi_sleep_states[ACPI_STATE_S1] ? 631 ACPI_STATE_S1 : ACPI_STATE_UNKNOWN; 632 sc->acpi_suspend_sx = acpi_sleep_states[ACPI_STATE_S3] ? 633 ACPI_STATE_S3 : ACPI_STATE_UNKNOWN; 634 635 /* Pick the first valid sleep state for the sleep button default. */ 636 sc->acpi_sleep_button_sx = ACPI_STATE_UNKNOWN; 637 for (state = ACPI_STATE_S1; state <= ACPI_STATE_S4; state++) 638 if (acpi_sleep_states[state]) { 639 sc->acpi_sleep_button_sx = state; 640 break; 641 } 642 643 acpi_enable_fixed_events(sc); 644 645 /* 646 * Scan the namespace and attach/initialise children. 647 */ 648 649 /* Register our shutdown handler. */ 650 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 651 SHUTDOWN_PRI_LAST); 652 653 /* 654 * Register our acpi event handlers. 655 * XXX should be configurable eg. via userland policy manager. 656 */ 657 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 658 sc, ACPI_EVENT_PRI_LAST); 659 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 660 sc, ACPI_EVENT_PRI_LAST); 661 662 /* Flag our initial states. */ 663 sc->acpi_enabled = TRUE; 664 sc->acpi_sstate = ACPI_STATE_S0; 665 sc->acpi_sleep_disabled = TRUE; 666 667 /* Create the control device */ 668 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644, 669 "acpi"); 670 sc->acpi_dev_t->si_drv1 = sc; 671 672 if ((error = acpi_machdep_init(dev))) 673 goto out; 674 675 /* Register ACPI again to pass the correct argument of pm_func. */ 676 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 677 678 if (!acpi_disabled("bus")) 679 acpi_probe_children(dev); 680 681 /* Allow sleep request after a while. */ 682 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); 683 684 error = 0; 685 686 out: 687 return_VALUE (error); 688 } 689 690 static int 691 acpi_suspend(device_t dev) 692 { 693 device_t child, *devlist; 694 int error, i, numdevs, pstate; 695 696 GIANT_REQUIRED; 697 698 /* First give child devices a chance to suspend. */ 699 error = bus_generic_suspend(dev); 700 if (error) 701 return (error); 702 703 /* 704 * Now, set them into the appropriate power state, usually D3. If the 705 * device has an _SxD method for the next sleep state, use that power 706 * state instead. 707 */ 708 error = device_get_children(dev, &devlist, &numdevs); 709 if (error) 710 return (error); 711 for (i = 0; i < numdevs; i++) { 712 /* If the device is not attached, we've powered it down elsewhere. */ 713 child = devlist[i]; 714 if (!device_is_attached(child)) 715 continue; 716 717 /* 718 * Default to D3 for all sleep states. The _SxD method is optional 719 * so set the powerstate even if it's absent. 720 */ 721 pstate = PCI_POWERSTATE_D3; 722 error = acpi_device_pwr_for_sleep(device_get_parent(child), 723 child, &pstate); 724 if ((error == 0 || error == ESRCH) && acpi_do_powerstate) 725 pci_set_powerstate(child, pstate); 726 } 727 free(devlist, M_TEMP); 728 error = 0; 729 730 return (error); 731 } 732 733 static int 734 acpi_resume(device_t dev) 735 { 736 ACPI_HANDLE handle; 737 int i, numdevs, error; 738 device_t child, *devlist; 739 740 GIANT_REQUIRED; 741 742 /* 743 * Put all devices in D0 before resuming them. Call _S0D on each one 744 * since some systems expect this. 745 */ 746 error = device_get_children(dev, &devlist, &numdevs); 747 if (error) 748 return (error); 749 for (i = 0; i < numdevs; i++) { 750 child = devlist[i]; 751 handle = acpi_get_handle(child); 752 if (handle) 753 AcpiEvaluateObject(handle, "_S0D", NULL, NULL); 754 if (device_is_attached(child) && acpi_do_powerstate) 755 pci_set_powerstate(child, PCI_POWERSTATE_D0); 756 } 757 free(devlist, M_TEMP); 758 759 return (bus_generic_resume(dev)); 760 } 761 762 static int 763 acpi_shutdown(device_t dev) 764 { 765 766 GIANT_REQUIRED; 767 768 /* Allow children to shutdown first. */ 769 bus_generic_shutdown(dev); 770 771 /* 772 * Enable any GPEs that are able to power-on the system (i.e., RTC). 773 * Also, disable any that are not valid for this state (most). 774 */ 775 acpi_wake_prep_walk(ACPI_STATE_S5); 776 777 return (0); 778 } 779 780 /* 781 * Handle a new device being added 782 */ 783 static device_t 784 acpi_add_child(device_t bus, u_int order, const char *name, int unit) 785 { 786 struct acpi_device *ad; 787 device_t child; 788 789 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 790 return (NULL); 791 792 resource_list_init(&ad->ad_rl); 793 794 child = device_add_child_ordered(bus, order, name, unit); 795 if (child != NULL) 796 device_set_ivars(child, ad); 797 else 798 free(ad, M_ACPIDEV); 799 return (child); 800 } 801 802 static int 803 acpi_print_child(device_t bus, device_t child) 804 { 805 struct acpi_device *adev = device_get_ivars(child); 806 struct resource_list *rl = &adev->ad_rl; 807 int retval = 0; 808 809 retval += bus_print_child_header(bus, child); 810 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 811 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 812 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 813 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 814 if (device_get_flags(child)) 815 retval += printf(" flags %#x", device_get_flags(child)); 816 retval += bus_print_child_footer(bus, child); 817 818 return (retval); 819 } 820 821 /* 822 * If this device is an ACPI child but no one claimed it, attempt 823 * to power it off. We'll power it back up when a driver is added. 824 * 825 * XXX Disabled for now since many necessary devices (like fdc and 826 * ATA) don't claim the devices we created for them but still expect 827 * them to be powered up. 828 */ 829 static void 830 acpi_probe_nomatch(device_t bus, device_t child) 831 { 832 #ifdef ACPI_ENABLE_POWERDOWN_NODRIVER 833 pci_set_powerstate(child, PCI_POWERSTATE_D3); 834 #endif 835 } 836 837 /* 838 * If a new driver has a chance to probe a child, first power it up. 839 * 840 * XXX Disabled for now (see acpi_probe_nomatch for details). 841 */ 842 static void 843 acpi_driver_added(device_t dev, driver_t *driver) 844 { 845 device_t child, *devlist; 846 int i, numdevs; 847 848 DEVICE_IDENTIFY(driver, dev); 849 if (device_get_children(dev, &devlist, &numdevs)) 850 return; 851 for (i = 0; i < numdevs; i++) { 852 child = devlist[i]; 853 if (device_get_state(child) == DS_NOTPRESENT) { 854 #ifdef ACPI_ENABLE_POWERDOWN_NODRIVER 855 pci_set_powerstate(child, PCI_POWERSTATE_D0); 856 if (device_probe_and_attach(child) != 0) 857 pci_set_powerstate(child, PCI_POWERSTATE_D3); 858 #else 859 device_probe_and_attach(child); 860 #endif 861 } 862 } 863 free(devlist, M_TEMP); 864 } 865 866 /* Location hint for devctl(8) */ 867 static int 868 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf, 869 size_t buflen) 870 { 871 struct acpi_device *dinfo = device_get_ivars(child); 872 873 if (dinfo->ad_handle) 874 snprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle)); 875 else 876 snprintf(buf, buflen, "unknown"); 877 return (0); 878 } 879 880 /* PnP information for devctl(8) */ 881 static int 882 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 883 size_t buflen) 884 { 885 struct acpi_device *dinfo = device_get_ivars(child); 886 ACPI_DEVICE_INFO *adinfo; 887 888 if (ACPI_FAILURE(AcpiGetObjectInfo(dinfo->ad_handle, &adinfo))) { 889 snprintf(buf, buflen, "unknown"); 890 return (0); 891 } 892 893 snprintf(buf, buflen, "_HID=%s _UID=%lu", 894 (adinfo->Valid & ACPI_VALID_HID) ? 895 adinfo->HardwareId.String : "none", 896 (adinfo->Valid & ACPI_VALID_UID) ? 897 strtoul(adinfo->UniqueId.String, NULL, 10) : 0UL); 898 AcpiOsFree(adinfo); 899 900 return (0); 901 } 902 903 /* 904 * Handle per-device ivars 905 */ 906 static int 907 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 908 { 909 struct acpi_device *ad; 910 911 if ((ad = device_get_ivars(child)) == NULL) { 912 device_printf(child, "device has no ivars\n"); 913 return (ENOENT); 914 } 915 916 /* ACPI and ISA compatibility ivars */ 917 switch(index) { 918 case ACPI_IVAR_HANDLE: 919 *(ACPI_HANDLE *)result = ad->ad_handle; 920 break; 921 case ACPI_IVAR_PRIVATE: 922 *(void **)result = ad->ad_private; 923 break; 924 case ACPI_IVAR_FLAGS: 925 *(int *)result = ad->ad_flags; 926 break; 927 case ISA_IVAR_VENDORID: 928 case ISA_IVAR_SERIAL: 929 case ISA_IVAR_COMPATID: 930 *(int *)result = -1; 931 break; 932 case ISA_IVAR_LOGICALID: 933 *(int *)result = acpi_isa_get_logicalid(child); 934 break; 935 default: 936 return (ENOENT); 937 } 938 939 return (0); 940 } 941 942 static int 943 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 944 { 945 struct acpi_device *ad; 946 947 if ((ad = device_get_ivars(child)) == NULL) { 948 device_printf(child, "device has no ivars\n"); 949 return (ENOENT); 950 } 951 952 switch(index) { 953 case ACPI_IVAR_HANDLE: 954 ad->ad_handle = (ACPI_HANDLE)value; 955 break; 956 case ACPI_IVAR_PRIVATE: 957 ad->ad_private = (void *)value; 958 break; 959 case ACPI_IVAR_FLAGS: 960 ad->ad_flags = (int)value; 961 break; 962 default: 963 panic("bad ivar write request (%d)", index); 964 return (ENOENT); 965 } 966 967 return (0); 968 } 969 970 /* 971 * Handle child resource allocation/removal 972 */ 973 static struct resource_list * 974 acpi_get_rlist(device_t dev, device_t child) 975 { 976 struct acpi_device *ad; 977 978 ad = device_get_ivars(child); 979 return (&ad->ad_rl); 980 } 981 982 static int 983 acpi_match_resource_hint(device_t dev, int type, long value) 984 { 985 struct acpi_device *ad = device_get_ivars(dev); 986 struct resource_list *rl = &ad->ad_rl; 987 struct resource_list_entry *rle; 988 989 STAILQ_FOREACH(rle, rl, link) { 990 if (rle->type != type) 991 continue; 992 if (rle->start <= value && rle->end >= value) 993 return (1); 994 } 995 return (0); 996 } 997 998 /* 999 * Wire device unit numbers based on resource matches in hints. 1000 */ 1001 static void 1002 acpi_hint_device_unit(device_t acdev, device_t child, const char *name, 1003 int *unitp) 1004 { 1005 const char *s; 1006 long value; 1007 int line, matches, unit; 1008 1009 /* 1010 * Iterate over all the hints for the devices with the specified 1011 * name to see if one's resources are a subset of this device. 1012 */ 1013 line = 0; 1014 for (;;) { 1015 if (resource_find_dev(&line, name, &unit, "at", NULL) != 0) 1016 break; 1017 1018 /* Must have an "at" for acpi or isa. */ 1019 resource_string_value(name, unit, "at", &s); 1020 if (!(strcmp(s, "acpi0") == 0 || strcmp(s, "acpi") == 0 || 1021 strcmp(s, "isa0") == 0 || strcmp(s, "isa") == 0)) 1022 continue; 1023 1024 /* 1025 * Check for matching resources. We must have at least one match. 1026 * Since I/O and memory resources cannot be shared, if we get a 1027 * match on either of those, ignore any mismatches in IRQs or DRQs. 1028 * 1029 * XXX: We may want to revisit this to be more lenient and wire 1030 * as long as it gets one match. 1031 */ 1032 matches = 0; 1033 if (resource_long_value(name, unit, "port", &value) == 0) { 1034 /* 1035 * Floppy drive controllers are notorious for having a 1036 * wide variety of resources not all of which include the 1037 * first port that is specified by the hint (typically 1038 * 0x3f0) (see the comment above fdc_isa_alloc_resources() 1039 * in fdc_isa.c). However, they do all seem to include 1040 * port + 2 (e.g. 0x3f2) so for a floppy device, look for 1041 * 'value + 2' in the port resources instead of the hint 1042 * value. 1043 */ 1044 if (strcmp(name, "fdc") == 0) 1045 value += 2; 1046 if (acpi_match_resource_hint(child, SYS_RES_IOPORT, value)) 1047 matches++; 1048 else 1049 continue; 1050 } 1051 if (resource_long_value(name, unit, "maddr", &value) == 0) { 1052 if (acpi_match_resource_hint(child, SYS_RES_MEMORY, value)) 1053 matches++; 1054 else 1055 continue; 1056 } 1057 if (matches > 0) 1058 goto matched; 1059 if (resource_long_value(name, unit, "irq", &value) == 0) { 1060 if (acpi_match_resource_hint(child, SYS_RES_IRQ, value)) 1061 matches++; 1062 else 1063 continue; 1064 } 1065 if (resource_long_value(name, unit, "drq", &value) == 0) { 1066 if (acpi_match_resource_hint(child, SYS_RES_DRQ, value)) 1067 matches++; 1068 else 1069 continue; 1070 } 1071 1072 matched: 1073 if (matches > 0) { 1074 /* We have a winner! */ 1075 *unitp = unit; 1076 break; 1077 } 1078 } 1079 } 1080 1081 /* 1082 * Pre-allocate/manage all memory and IO resources. Since rman can't handle 1083 * duplicates, we merge any in the sysresource attach routine. 1084 */ 1085 static int 1086 acpi_sysres_alloc(device_t dev) 1087 { 1088 struct resource *res; 1089 struct resource_list *rl; 1090 struct resource_list_entry *rle; 1091 struct rman *rm; 1092 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 1093 device_t *children; 1094 int child_count, i; 1095 1096 /* 1097 * Probe/attach any sysresource devices. This would be unnecessary if we 1098 * had multi-pass probe/attach. 1099 */ 1100 if (device_get_children(dev, &children, &child_count) != 0) 1101 return (ENXIO); 1102 for (i = 0; i < child_count; i++) { 1103 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 1104 device_probe_and_attach(children[i]); 1105 } 1106 free(children, M_TEMP); 1107 1108 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev); 1109 STAILQ_FOREACH(rle, rl, link) { 1110 if (rle->res != NULL) { 1111 device_printf(dev, "duplicate resource for %lx\n", rle->start); 1112 continue; 1113 } 1114 1115 /* Only memory and IO resources are valid here. */ 1116 switch (rle->type) { 1117 case SYS_RES_IOPORT: 1118 rm = &acpi_rman_io; 1119 break; 1120 case SYS_RES_MEMORY: 1121 rm = &acpi_rman_mem; 1122 break; 1123 default: 1124 continue; 1125 } 1126 1127 /* Pre-allocate resource and add to our rman pool. */ 1128 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type, 1129 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 0); 1130 if (res != NULL) { 1131 rman_manage_region(rm, rman_get_start(res), rman_get_end(res)); 1132 rle->res = res; 1133 } else 1134 device_printf(dev, "reservation of %lx, %lx (%d) failed\n", 1135 rle->start, rle->count, rle->type); 1136 } 1137 return (0); 1138 } 1139 1140 static struct resource * 1141 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 1142 u_long start, u_long end, u_long count, u_int flags) 1143 { 1144 ACPI_RESOURCE ares; 1145 struct acpi_device *ad = device_get_ivars(child); 1146 struct resource_list *rl = &ad->ad_rl; 1147 struct resource_list_entry *rle; 1148 struct resource *res; 1149 struct rman *rm; 1150 1151 res = NULL; 1152 1153 /* We only handle memory and IO resources through rman. */ 1154 switch (type) { 1155 case SYS_RES_IOPORT: 1156 rm = &acpi_rman_io; 1157 break; 1158 case SYS_RES_MEMORY: 1159 rm = &acpi_rman_mem; 1160 break; 1161 default: 1162 rm = NULL; 1163 } 1164 1165 ACPI_SERIAL_BEGIN(acpi); 1166 1167 /* 1168 * If this is an allocation of the "default" range for a given RID, and 1169 * we know what the resources for this device are (i.e., they're on the 1170 * child's resource list), use those start/end values. 1171 */ 1172 if (bus == device_get_parent(child) && start == 0UL && end == ~0UL) { 1173 rle = resource_list_find(rl, type, *rid); 1174 if (rle == NULL) 1175 goto out; 1176 start = rle->start; 1177 end = rle->end; 1178 count = rle->count; 1179 } 1180 1181 /* 1182 * If this is an allocation of a specific range, see if we can satisfy 1183 * the request from our system resource regions. If we can't, pass the 1184 * request up to the parent. 1185 */ 1186 if (start + count - 1 == end && rm != NULL) 1187 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE, 1188 child); 1189 if (res == NULL) { 1190 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid, 1191 start, end, count, flags); 1192 } else { 1193 rman_set_rid(res, *rid); 1194 1195 /* If requested, activate the resource using the parent's method. */ 1196 if (flags & RF_ACTIVE) 1197 if (bus_activate_resource(child, type, *rid, res) != 0) { 1198 rman_release_resource(res); 1199 res = NULL; 1200 goto out; 1201 } 1202 } 1203 1204 if (res != NULL && device_get_parent(child) == bus) 1205 switch (type) { 1206 case SYS_RES_IRQ: 1207 /* 1208 * Since bus_config_intr() takes immediate effect, we cannot 1209 * configure the interrupt associated with a device when we 1210 * parse the resources but have to defer it until a driver 1211 * actually allocates the interrupt via bus_alloc_resource(). 1212 * 1213 * XXX: Should we handle the lookup failing? 1214 */ 1215 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares))) 1216 acpi_config_intr(child, &ares); 1217 break; 1218 } 1219 1220 out: 1221 ACPI_SERIAL_END(acpi); 1222 return (res); 1223 } 1224 1225 static int 1226 acpi_release_resource(device_t bus, device_t child, int type, int rid, 1227 struct resource *r) 1228 { 1229 struct rman *rm; 1230 int ret; 1231 1232 /* We only handle memory and IO resources through rman. */ 1233 switch (type) { 1234 case SYS_RES_IOPORT: 1235 rm = &acpi_rman_io; 1236 break; 1237 case SYS_RES_MEMORY: 1238 rm = &acpi_rman_mem; 1239 break; 1240 default: 1241 rm = NULL; 1242 } 1243 1244 ACPI_SERIAL_BEGIN(acpi); 1245 1246 /* 1247 * If this resource belongs to one of our internal managers, 1248 * deactivate it and release it to the local pool. If it doesn't, 1249 * pass this request up to the parent. 1250 */ 1251 if (rm != NULL && rman_is_region_manager(r, rm)) { 1252 if (rman_get_flags(r) & RF_ACTIVE) { 1253 ret = bus_deactivate_resource(child, type, rid, r); 1254 if (ret != 0) 1255 goto out; 1256 } 1257 ret = rman_release_resource(r); 1258 } else 1259 ret = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, type, rid, r); 1260 1261 out: 1262 ACPI_SERIAL_END(acpi); 1263 return (ret); 1264 } 1265 1266 static void 1267 acpi_delete_resource(device_t bus, device_t child, int type, int rid) 1268 { 1269 struct resource_list *rl; 1270 1271 rl = acpi_get_rlist(bus, child); 1272 resource_list_delete(rl, type, rid); 1273 } 1274 1275 /* Allocate an IO port or memory resource, given its GAS. */ 1276 int 1277 acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas, 1278 struct resource **res, u_int flags) 1279 { 1280 int error, res_type; 1281 1282 error = ENOMEM; 1283 if (type == NULL || rid == NULL || gas == NULL || res == NULL) 1284 return (EINVAL); 1285 1286 /* We only support memory and IO spaces. */ 1287 switch (gas->SpaceId) { 1288 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1289 res_type = SYS_RES_MEMORY; 1290 break; 1291 case ACPI_ADR_SPACE_SYSTEM_IO: 1292 res_type = SYS_RES_IOPORT; 1293 break; 1294 default: 1295 return (EOPNOTSUPP); 1296 } 1297 1298 /* 1299 * If the register width is less than 8, assume the BIOS author means 1300 * it is a bit field and just allocate a byte. 1301 */ 1302 if (gas->BitWidth && gas->BitWidth < 8) 1303 gas->BitWidth = 8; 1304 1305 /* Validate the address after we're sure we support the space. */ 1306 if (gas->Address == 0 || gas->BitWidth == 0) 1307 return (EINVAL); 1308 1309 bus_set_resource(dev, res_type, *rid, gas->Address, 1310 gas->BitWidth / 8); 1311 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags); 1312 if (*res != NULL) { 1313 *type = res_type; 1314 error = 0; 1315 } else 1316 bus_delete_resource(dev, res_type, *rid); 1317 1318 return (error); 1319 } 1320 1321 /* Probe _HID and _CID for compatible ISA PNP ids. */ 1322 static uint32_t 1323 acpi_isa_get_logicalid(device_t dev) 1324 { 1325 ACPI_DEVICE_INFO *devinfo; 1326 ACPI_HANDLE h; 1327 uint32_t pnpid; 1328 1329 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1330 1331 /* Fetch and validate the HID. */ 1332 if ((h = acpi_get_handle(dev)) == NULL || 1333 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1334 return_VALUE (0); 1335 1336 pnpid = (devinfo->Valid & ACPI_VALID_HID) != 0 && 1337 devinfo->HardwareId.Length >= ACPI_EISAID_STRING_SIZE ? 1338 PNP_EISAID(devinfo->HardwareId.String) : 0; 1339 AcpiOsFree(devinfo); 1340 1341 return_VALUE (pnpid); 1342 } 1343 1344 static int 1345 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 1346 { 1347 ACPI_DEVICE_INFO *devinfo; 1348 ACPI_DEVICE_ID *ids; 1349 ACPI_HANDLE h; 1350 uint32_t *pnpid; 1351 int i, valid; 1352 1353 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1354 1355 pnpid = cids; 1356 1357 /* Fetch and validate the CID */ 1358 if ((h = acpi_get_handle(dev)) == NULL || 1359 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1360 return_VALUE (0); 1361 1362 if ((devinfo->Valid & ACPI_VALID_CID) == 0) { 1363 AcpiOsFree(devinfo); 1364 return_VALUE (0); 1365 } 1366 1367 if (devinfo->CompatibleIdList.Count < count) 1368 count = devinfo->CompatibleIdList.Count; 1369 ids = devinfo->CompatibleIdList.Ids; 1370 for (i = 0, valid = 0; i < count; i++) 1371 if (ids[i].Length >= ACPI_EISAID_STRING_SIZE && 1372 strncmp(ids[i].String, "PNP", 3) == 0) { 1373 *pnpid++ = PNP_EISAID(ids[i].String); 1374 valid++; 1375 } 1376 AcpiOsFree(devinfo); 1377 1378 return_VALUE (valid); 1379 } 1380 1381 static char * 1382 acpi_device_id_probe(device_t bus, device_t dev, char **ids) 1383 { 1384 ACPI_HANDLE h; 1385 ACPI_OBJECT_TYPE t; 1386 int i; 1387 1388 h = acpi_get_handle(dev); 1389 if (ids == NULL || h == NULL) 1390 return (NULL); 1391 t = acpi_get_type(dev); 1392 if (t != ACPI_TYPE_DEVICE && t != ACPI_TYPE_PROCESSOR) 1393 return (NULL); 1394 1395 /* Try to match one of the array of IDs with a HID or CID. */ 1396 for (i = 0; ids[i] != NULL; i++) { 1397 if (acpi_MatchHid(h, ids[i])) 1398 return (ids[i]); 1399 } 1400 return (NULL); 1401 } 1402 1403 static ACPI_STATUS 1404 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname, 1405 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret) 1406 { 1407 ACPI_HANDLE h; 1408 1409 if (dev == NULL) 1410 h = ACPI_ROOT_OBJECT; 1411 else if ((h = acpi_get_handle(dev)) == NULL) 1412 return (AE_BAD_PARAMETER); 1413 return (AcpiEvaluateObject(h, pathname, parameters, ret)); 1414 } 1415 1416 int 1417 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate) 1418 { 1419 struct acpi_softc *sc; 1420 ACPI_HANDLE handle; 1421 ACPI_STATUS status; 1422 char sxd[8]; 1423 int error; 1424 1425 sc = device_get_softc(bus); 1426 handle = acpi_get_handle(dev); 1427 1428 /* 1429 * XXX If we find these devices, don't try to power them down. 1430 * The serial and IRDA ports on my T23 hang the system when 1431 * set to D3 and it appears that such legacy devices may 1432 * need special handling in their drivers. 1433 */ 1434 if (handle == NULL || 1435 acpi_MatchHid(handle, "PNP0500") || 1436 acpi_MatchHid(handle, "PNP0501") || 1437 acpi_MatchHid(handle, "PNP0502") || 1438 acpi_MatchHid(handle, "PNP0510") || 1439 acpi_MatchHid(handle, "PNP0511")) 1440 return (ENXIO); 1441 1442 /* 1443 * Override next state with the value from _SxD, if present. If no 1444 * dstate argument was provided, don't fetch the return value. 1445 */ 1446 snprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate); 1447 if (dstate) 1448 status = acpi_GetInteger(handle, sxd, dstate); 1449 else 1450 status = AcpiEvaluateObject(handle, sxd, NULL, NULL); 1451 1452 switch (status) { 1453 case AE_OK: 1454 error = 0; 1455 break; 1456 case AE_NOT_FOUND: 1457 error = ESRCH; 1458 break; 1459 default: 1460 error = ENXIO; 1461 break; 1462 } 1463 1464 return (error); 1465 } 1466 1467 /* Callback arg for our implementation of walking the namespace. */ 1468 struct acpi_device_scan_ctx { 1469 acpi_scan_cb_t user_fn; 1470 void *arg; 1471 ACPI_HANDLE parent; 1472 }; 1473 1474 static ACPI_STATUS 1475 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval) 1476 { 1477 struct acpi_device_scan_ctx *ctx; 1478 device_t dev, old_dev; 1479 ACPI_STATUS status; 1480 ACPI_OBJECT_TYPE type; 1481 1482 /* 1483 * Skip this device if we think we'll have trouble with it or it is 1484 * the parent where the scan began. 1485 */ 1486 ctx = (struct acpi_device_scan_ctx *)arg; 1487 if (acpi_avoid(h) || h == ctx->parent) 1488 return (AE_OK); 1489 1490 /* If this is not a valid device type (e.g., a method), skip it. */ 1491 if (ACPI_FAILURE(AcpiGetType(h, &type))) 1492 return (AE_OK); 1493 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR && 1494 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER) 1495 return (AE_OK); 1496 1497 /* 1498 * Call the user function with the current device. If it is unchanged 1499 * afterwards, return. Otherwise, we update the handle to the new dev. 1500 */ 1501 old_dev = acpi_get_device(h); 1502 dev = old_dev; 1503 status = ctx->user_fn(h, &dev, level, ctx->arg); 1504 if (ACPI_FAILURE(status) || old_dev == dev) 1505 return (status); 1506 1507 /* Remove the old child and its connection to the handle. */ 1508 if (old_dev != NULL) { 1509 device_delete_child(device_get_parent(old_dev), old_dev); 1510 AcpiDetachData(h, acpi_fake_objhandler); 1511 } 1512 1513 /* Recreate the handle association if the user created a device. */ 1514 if (dev != NULL) 1515 AcpiAttachData(h, acpi_fake_objhandler, dev); 1516 1517 return (AE_OK); 1518 } 1519 1520 static ACPI_STATUS 1521 acpi_device_scan_children(device_t bus, device_t dev, int max_depth, 1522 acpi_scan_cb_t user_fn, void *arg) 1523 { 1524 ACPI_HANDLE h; 1525 struct acpi_device_scan_ctx ctx; 1526 1527 if (acpi_disabled("children")) 1528 return (AE_OK); 1529 1530 if (dev == NULL) 1531 h = ACPI_ROOT_OBJECT; 1532 else if ((h = acpi_get_handle(dev)) == NULL) 1533 return (AE_BAD_PARAMETER); 1534 ctx.user_fn = user_fn; 1535 ctx.arg = arg; 1536 ctx.parent = h; 1537 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth, 1538 acpi_device_scan_cb, NULL, &ctx, NULL)); 1539 } 1540 1541 /* 1542 * Even though ACPI devices are not PCI, we use the PCI approach for setting 1543 * device power states since it's close enough to ACPI. 1544 */ 1545 static int 1546 acpi_set_powerstate_method(device_t bus, device_t child, int state) 1547 { 1548 ACPI_HANDLE h; 1549 ACPI_STATUS status; 1550 int error; 1551 1552 error = 0; 1553 h = acpi_get_handle(child); 1554 if (state < ACPI_STATE_D0 || state > ACPI_D_STATES_MAX) 1555 return (EINVAL); 1556 if (h == NULL) 1557 return (0); 1558 1559 /* Ignore errors if the power methods aren't present. */ 1560 status = acpi_pwr_switch_consumer(h, state); 1561 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND 1562 && status != AE_BAD_PARAMETER) 1563 device_printf(bus, "failed to set ACPI power state D%d on %s: %s\n", 1564 state, acpi_name(h), AcpiFormatException(status)); 1565 1566 return (error); 1567 } 1568 1569 static int 1570 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 1571 { 1572 int result, cid_count, i; 1573 uint32_t lid, cids[8]; 1574 1575 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1576 1577 /* 1578 * ISA-style drivers attached to ACPI may persist and 1579 * probe manually if we return ENOENT. We never want 1580 * that to happen, so don't ever return it. 1581 */ 1582 result = ENXIO; 1583 1584 /* Scan the supplied IDs for a match */ 1585 lid = acpi_isa_get_logicalid(child); 1586 cid_count = acpi_isa_get_compatid(child, cids, 8); 1587 while (ids && ids->ip_id) { 1588 if (lid == ids->ip_id) { 1589 result = 0; 1590 goto out; 1591 } 1592 for (i = 0; i < cid_count; i++) { 1593 if (cids[i] == ids->ip_id) { 1594 result = 0; 1595 goto out; 1596 } 1597 } 1598 ids++; 1599 } 1600 1601 out: 1602 if (result == 0 && ids->ip_desc) 1603 device_set_desc(child, ids->ip_desc); 1604 1605 return_VALUE (result); 1606 } 1607 1608 #if defined(__i386__) || defined(__amd64__) 1609 /* 1610 * Look for a MCFG table. If it is present, use the settings for 1611 * domain (segment) 0 to setup PCI config space access via the memory 1612 * map. 1613 */ 1614 static void 1615 acpi_enable_pcie(void) 1616 { 1617 ACPI_TABLE_HEADER *hdr; 1618 ACPI_MCFG_ALLOCATION *alloc, *end; 1619 ACPI_STATUS status; 1620 1621 status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr); 1622 if (ACPI_FAILURE(status)) 1623 return; 1624 1625 end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length); 1626 alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1); 1627 while (alloc < end) { 1628 if (alloc->PciSegment == 0) { 1629 pcie_cfgregopen(alloc->Address, alloc->StartBusNumber, 1630 alloc->EndBusNumber); 1631 return; 1632 } 1633 alloc++; 1634 } 1635 } 1636 #endif 1637 1638 /* 1639 * Scan all of the ACPI namespace and attach child devices. 1640 * 1641 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and 1642 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec. 1643 * However, in violation of the spec, some systems place their PCI link 1644 * devices in \, so we have to walk the whole namespace. We check the 1645 * type of namespace nodes, so this should be ok. 1646 */ 1647 static void 1648 acpi_probe_children(device_t bus) 1649 { 1650 1651 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1652 1653 /* 1654 * Scan the namespace and insert placeholders for all the devices that 1655 * we find. We also probe/attach any early devices. 1656 * 1657 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1658 * we want to create nodes for all devices, not just those that are 1659 * currently present. (This assumes that we don't want to create/remove 1660 * devices as they appear, which might be smarter.) 1661 */ 1662 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1663 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, acpi_probe_child, 1664 NULL, bus, NULL); 1665 1666 /* Pre-allocate resources for our rman from any sysresource devices. */ 1667 acpi_sysres_alloc(bus); 1668 1669 /* Create any static children by calling device identify methods. */ 1670 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1671 bus_generic_probe(bus); 1672 1673 /* Probe/attach all children, created staticly and from the namespace. */ 1674 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "acpi bus_generic_attach\n")); 1675 bus_generic_attach(bus); 1676 1677 /* Attach wake sysctls. */ 1678 acpi_wake_sysctl_walk(bus); 1679 1680 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1681 return_VOID; 1682 } 1683 1684 /* 1685 * Determine the probe order for a given device. 1686 */ 1687 static void 1688 acpi_probe_order(ACPI_HANDLE handle, int *order) 1689 { 1690 ACPI_OBJECT_TYPE type; 1691 1692 /* 1693 * 1. CPUs 1694 * 2. I/O port and memory system resource holders 1695 * 3. Embedded controllers (to handle early accesses) 1696 * 4. PCI Link Devices 1697 */ 1698 AcpiGetType(handle, &type); 1699 if (type == ACPI_TYPE_PROCESSOR) 1700 *order = 1; 1701 else if (acpi_MatchHid(handle, "PNP0C01") || acpi_MatchHid(handle, "PNP0C02")) 1702 *order = 2; 1703 else if (acpi_MatchHid(handle, "PNP0C09")) 1704 *order = 3; 1705 else if (acpi_MatchHid(handle, "PNP0C0F")) 1706 *order = 4; 1707 } 1708 1709 /* 1710 * Evaluate a child device and determine whether we might attach a device to 1711 * it. 1712 */ 1713 static ACPI_STATUS 1714 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1715 { 1716 ACPI_OBJECT_TYPE type; 1717 ACPI_HANDLE h; 1718 device_t bus, child; 1719 int order; 1720 char *handle_str, **search; 1721 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI_", "\\_SB_", NULL}; 1722 1723 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1724 1725 /* Skip this device if we think we'll have trouble with it. */ 1726 if (acpi_avoid(handle)) 1727 return_ACPI_STATUS (AE_OK); 1728 1729 bus = (device_t)context; 1730 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1731 switch (type) { 1732 case ACPI_TYPE_DEVICE: 1733 case ACPI_TYPE_PROCESSOR: 1734 case ACPI_TYPE_THERMAL: 1735 case ACPI_TYPE_POWER: 1736 if (acpi_disabled("children")) 1737 break; 1738 1739 /* 1740 * Since we scan from \, be sure to skip system scope objects. 1741 * At least \_SB and \_TZ are detected as devices (ACPI-CA bug?) 1742 */ 1743 handle_str = acpi_name(handle); 1744 for (search = scopes; *search != NULL; search++) { 1745 if (strcmp(handle_str, *search) == 0) 1746 break; 1747 } 1748 if (*search != NULL) 1749 break; 1750 1751 /* 1752 * Create a placeholder device for this node. Sort the 1753 * placeholder so that the probe/attach passes will run 1754 * breadth-first. Orders less than ACPI_DEV_BASE_ORDER 1755 * are reserved for special objects (i.e., system 1756 * resources). 1757 */ 1758 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str)); 1759 order = level * 10 + 100; 1760 acpi_probe_order(handle, &order); 1761 child = BUS_ADD_CHILD(bus, order, NULL, -1); 1762 if (child == NULL) 1763 break; 1764 1765 /* Associate the handle with the device_t and vice versa. */ 1766 acpi_set_handle(child, handle); 1767 AcpiAttachData(handle, acpi_fake_objhandler, child); 1768 1769 /* 1770 * Check that the device is present. If it's not present, 1771 * leave it disabled (so that we have a device_t attached to 1772 * the handle, but we don't probe it). 1773 * 1774 * XXX PCI link devices sometimes report "present" but not 1775 * "functional" (i.e. if disabled). Go ahead and probe them 1776 * anyway since we may enable them later. 1777 */ 1778 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 1779 /* Never disable PCI link devices. */ 1780 if (acpi_MatchHid(handle, "PNP0C0F")) 1781 break; 1782 /* 1783 * Docking stations should remain enabled since the system 1784 * may be undocked at boot. 1785 */ 1786 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h))) 1787 break; 1788 1789 device_disable(child); 1790 break; 1791 } 1792 1793 /* 1794 * Get the device's resource settings and attach them. 1795 * Note that if the device has _PRS but no _CRS, we need 1796 * to decide when it's appropriate to try to configure the 1797 * device. Ignore the return value here; it's OK for the 1798 * device not to have any resources. 1799 */ 1800 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 1801 break; 1802 } 1803 } 1804 1805 return_ACPI_STATUS (AE_OK); 1806 } 1807 1808 /* 1809 * AcpiAttachData() requires an object handler but never uses it. This is a 1810 * placeholder object handler so we can store a device_t in an ACPI_HANDLE. 1811 */ 1812 void 1813 acpi_fake_objhandler(ACPI_HANDLE h, void *data) 1814 { 1815 } 1816 1817 static void 1818 acpi_shutdown_final(void *arg, int howto) 1819 { 1820 struct acpi_softc *sc = (struct acpi_softc *)arg; 1821 ACPI_STATUS status; 1822 1823 /* 1824 * XXX Shutdown code should only run on the BSP (cpuid 0). 1825 * Some chipsets do not power off the system correctly if called from 1826 * an AP. 1827 */ 1828 if ((howto & RB_POWEROFF) != 0) { 1829 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 1830 if (ACPI_FAILURE(status)) { 1831 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 1832 AcpiFormatException(status)); 1833 return; 1834 } 1835 device_printf(sc->acpi_dev, "Powering system off\n"); 1836 ACPI_DISABLE_IRQS(); 1837 status = AcpiEnterSleepState(ACPI_STATE_S5); 1838 if (ACPI_FAILURE(status)) 1839 device_printf(sc->acpi_dev, "power-off failed - %s\n", 1840 AcpiFormatException(status)); 1841 else { 1842 DELAY(1000000); 1843 device_printf(sc->acpi_dev, "power-off failed - timeout\n"); 1844 } 1845 } else if ((howto & RB_HALT) == 0 && 1846 (AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) && 1847 sc->acpi_handle_reboot) { 1848 /* Reboot using the reset register. */ 1849 status = AcpiWrite( 1850 AcpiGbl_FADT.ResetValue, &AcpiGbl_FADT.ResetRegister); 1851 if (ACPI_FAILURE(status)) 1852 device_printf(sc->acpi_dev, "reset failed - %s\n", 1853 AcpiFormatException(status)); 1854 else { 1855 DELAY(1000000); 1856 device_printf(sc->acpi_dev, "reset failed - timeout\n"); 1857 } 1858 } else if (sc->acpi_do_disable && panicstr == NULL) { 1859 /* 1860 * Only disable ACPI if the user requested. On some systems, writing 1861 * the disable value to SMI_CMD hangs the system. 1862 */ 1863 device_printf(sc->acpi_dev, "Shutting down\n"); 1864 AcpiTerminate(); 1865 } 1866 } 1867 1868 static void 1869 acpi_enable_fixed_events(struct acpi_softc *sc) 1870 { 1871 static int first_time = 1; 1872 1873 /* Enable and clear fixed events and install handlers. */ 1874 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) { 1875 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 1876 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 1877 acpi_event_power_button_sleep, sc); 1878 if (first_time) 1879 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 1880 } 1881 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) { 1882 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 1883 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 1884 acpi_event_sleep_button_sleep, sc); 1885 if (first_time) 1886 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 1887 } 1888 1889 first_time = 0; 1890 } 1891 1892 /* 1893 * Returns true if the device is actually present and should 1894 * be attached to. This requires the present, enabled, UI-visible 1895 * and diagnostics-passed bits to be set. 1896 */ 1897 BOOLEAN 1898 acpi_DeviceIsPresent(device_t dev) 1899 { 1900 ACPI_DEVICE_INFO *devinfo; 1901 ACPI_HANDLE h; 1902 BOOLEAN present; 1903 1904 if ((h = acpi_get_handle(dev)) == NULL || 1905 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1906 return (FALSE); 1907 1908 /* If no _STA method, must be present */ 1909 present = (devinfo->Valid & ACPI_VALID_STA) == 0 || 1910 ACPI_DEVICE_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE; 1911 1912 AcpiOsFree(devinfo); 1913 return (present); 1914 } 1915 1916 /* 1917 * Returns true if the battery is actually present and inserted. 1918 */ 1919 BOOLEAN 1920 acpi_BatteryIsPresent(device_t dev) 1921 { 1922 ACPI_DEVICE_INFO *devinfo; 1923 ACPI_HANDLE h; 1924 BOOLEAN present; 1925 1926 if ((h = acpi_get_handle(dev)) == NULL || 1927 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1928 return (FALSE); 1929 1930 /* If no _STA method, must be present */ 1931 present = (devinfo->Valid & ACPI_VALID_STA) == 0 || 1932 ACPI_BATTERY_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE; 1933 1934 AcpiOsFree(devinfo); 1935 return (present); 1936 } 1937 1938 /* 1939 * Match a HID string against a handle 1940 */ 1941 BOOLEAN 1942 acpi_MatchHid(ACPI_HANDLE h, const char *hid) 1943 { 1944 ACPI_DEVICE_INFO *devinfo; 1945 BOOLEAN ret; 1946 int i; 1947 1948 if (hid == NULL || h == NULL || 1949 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1950 return (FALSE); 1951 1952 ret = FALSE; 1953 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 1954 strcmp(hid, devinfo->HardwareId.String) == 0) 1955 ret = TRUE; 1956 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) 1957 for (i = 0; i < devinfo->CompatibleIdList.Count; i++) { 1958 if (strcmp(hid, devinfo->CompatibleIdList.Ids[i].String) == 0) { 1959 ret = TRUE; 1960 break; 1961 } 1962 } 1963 1964 AcpiOsFree(devinfo); 1965 return (ret); 1966 } 1967 1968 /* 1969 * Return the handle of a named object within our scope, ie. that of (parent) 1970 * or one if its parents. 1971 */ 1972 ACPI_STATUS 1973 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 1974 { 1975 ACPI_HANDLE r; 1976 ACPI_STATUS status; 1977 1978 /* Walk back up the tree to the root */ 1979 for (;;) { 1980 status = AcpiGetHandle(parent, path, &r); 1981 if (ACPI_SUCCESS(status)) { 1982 *result = r; 1983 return (AE_OK); 1984 } 1985 /* XXX Return error here? */ 1986 if (status != AE_NOT_FOUND) 1987 return (AE_OK); 1988 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 1989 return (AE_NOT_FOUND); 1990 parent = r; 1991 } 1992 } 1993 1994 /* Find the difference between two PM tick counts. */ 1995 uint32_t 1996 acpi_TimerDelta(uint32_t end, uint32_t start) 1997 { 1998 uint32_t delta; 1999 2000 if (end >= start) 2001 delta = end - start; 2002 else if (AcpiGbl_FADT.Flags & ACPI_FADT_32BIT_TIMER) 2003 delta = ((0xFFFFFFFF - start) + end + 1); 2004 else 2005 delta = ((0x00FFFFFF - start) + end + 1) & 0x00FFFFFF; 2006 return (delta); 2007 } 2008 2009 /* 2010 * Allocate a buffer with a preset data size. 2011 */ 2012 ACPI_BUFFER * 2013 acpi_AllocBuffer(int size) 2014 { 2015 ACPI_BUFFER *buf; 2016 2017 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 2018 return (NULL); 2019 buf->Length = size; 2020 buf->Pointer = (void *)(buf + 1); 2021 return (buf); 2022 } 2023 2024 ACPI_STATUS 2025 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 2026 { 2027 ACPI_OBJECT arg1; 2028 ACPI_OBJECT_LIST args; 2029 2030 arg1.Type = ACPI_TYPE_INTEGER; 2031 arg1.Integer.Value = number; 2032 args.Count = 1; 2033 args.Pointer = &arg1; 2034 2035 return (AcpiEvaluateObject(handle, path, &args, NULL)); 2036 } 2037 2038 /* 2039 * Evaluate a path that should return an integer. 2040 */ 2041 ACPI_STATUS 2042 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 2043 { 2044 ACPI_STATUS status; 2045 ACPI_BUFFER buf; 2046 ACPI_OBJECT param; 2047 2048 if (handle == NULL) 2049 handle = ACPI_ROOT_OBJECT; 2050 2051 /* 2052 * Assume that what we've been pointed at is an Integer object, or 2053 * a method that will return an Integer. 2054 */ 2055 buf.Pointer = ¶m; 2056 buf.Length = sizeof(param); 2057 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2058 if (ACPI_SUCCESS(status)) { 2059 if (param.Type == ACPI_TYPE_INTEGER) 2060 *number = param.Integer.Value; 2061 else 2062 status = AE_TYPE; 2063 } 2064 2065 /* 2066 * In some applications, a method that's expected to return an Integer 2067 * may instead return a Buffer (probably to simplify some internal 2068 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 2069 * convert it into an Integer as best we can. 2070 * 2071 * This is a hack. 2072 */ 2073 if (status == AE_BUFFER_OVERFLOW) { 2074 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 2075 status = AE_NO_MEMORY; 2076 } else { 2077 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2078 if (ACPI_SUCCESS(status)) 2079 status = acpi_ConvertBufferToInteger(&buf, number); 2080 AcpiOsFree(buf.Pointer); 2081 } 2082 } 2083 return (status); 2084 } 2085 2086 ACPI_STATUS 2087 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 2088 { 2089 ACPI_OBJECT *p; 2090 UINT8 *val; 2091 int i; 2092 2093 p = (ACPI_OBJECT *)bufp->Pointer; 2094 if (p->Type == ACPI_TYPE_INTEGER) { 2095 *number = p->Integer.Value; 2096 return (AE_OK); 2097 } 2098 if (p->Type != ACPI_TYPE_BUFFER) 2099 return (AE_TYPE); 2100 if (p->Buffer.Length > sizeof(int)) 2101 return (AE_BAD_DATA); 2102 2103 *number = 0; 2104 val = p->Buffer.Pointer; 2105 for (i = 0; i < p->Buffer.Length; i++) 2106 *number += val[i] << (i * 8); 2107 return (AE_OK); 2108 } 2109 2110 /* 2111 * Iterate over the elements of an a package object, calling the supplied 2112 * function for each element. 2113 * 2114 * XXX possible enhancement might be to abort traversal on error. 2115 */ 2116 ACPI_STATUS 2117 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 2118 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 2119 { 2120 ACPI_OBJECT *comp; 2121 int i; 2122 2123 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 2124 return (AE_BAD_PARAMETER); 2125 2126 /* Iterate over components */ 2127 i = 0; 2128 comp = pkg->Package.Elements; 2129 for (; i < pkg->Package.Count; i++, comp++) 2130 func(comp, arg); 2131 2132 return (AE_OK); 2133 } 2134 2135 /* 2136 * Find the (index)th resource object in a set. 2137 */ 2138 ACPI_STATUS 2139 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 2140 { 2141 ACPI_RESOURCE *rp; 2142 int i; 2143 2144 rp = (ACPI_RESOURCE *)buf->Pointer; 2145 i = index; 2146 while (i-- > 0) { 2147 /* Range check */ 2148 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2149 return (AE_BAD_PARAMETER); 2150 2151 /* Check for terminator */ 2152 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2153 return (AE_NOT_FOUND); 2154 rp = ACPI_NEXT_RESOURCE(rp); 2155 } 2156 if (resp != NULL) 2157 *resp = rp; 2158 2159 return (AE_OK); 2160 } 2161 2162 /* 2163 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 2164 * 2165 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 2166 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 2167 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 2168 * resources. 2169 */ 2170 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 2171 2172 ACPI_STATUS 2173 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 2174 { 2175 ACPI_RESOURCE *rp; 2176 void *newp; 2177 2178 /* Initialise the buffer if necessary. */ 2179 if (buf->Pointer == NULL) { 2180 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 2181 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 2182 return (AE_NO_MEMORY); 2183 rp = (ACPI_RESOURCE *)buf->Pointer; 2184 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2185 rp->Length = 0; 2186 } 2187 if (res == NULL) 2188 return (AE_OK); 2189 2190 /* 2191 * Scan the current buffer looking for the terminator. 2192 * This will either find the terminator or hit the end 2193 * of the buffer and return an error. 2194 */ 2195 rp = (ACPI_RESOURCE *)buf->Pointer; 2196 for (;;) { 2197 /* Range check, don't go outside the buffer */ 2198 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2199 return (AE_BAD_PARAMETER); 2200 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2201 break; 2202 rp = ACPI_NEXT_RESOURCE(rp); 2203 } 2204 2205 /* 2206 * Check the size of the buffer and expand if required. 2207 * 2208 * Required size is: 2209 * size of existing resources before terminator + 2210 * size of new resource and header + 2211 * size of terminator. 2212 * 2213 * Note that this loop should really only run once, unless 2214 * for some reason we are stuffing a *really* huge resource. 2215 */ 2216 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 2217 res->Length + ACPI_RS_SIZE_NO_DATA + 2218 ACPI_RS_SIZE_MIN) >= buf->Length) { 2219 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 2220 return (AE_NO_MEMORY); 2221 bcopy(buf->Pointer, newp, buf->Length); 2222 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 2223 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 2224 AcpiOsFree(buf->Pointer); 2225 buf->Pointer = newp; 2226 buf->Length += buf->Length; 2227 } 2228 2229 /* Insert the new resource. */ 2230 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA); 2231 2232 /* And add the terminator. */ 2233 rp = ACPI_NEXT_RESOURCE(rp); 2234 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2235 rp->Length = 0; 2236 2237 return (AE_OK); 2238 } 2239 2240 /* 2241 * Set interrupt model. 2242 */ 2243 ACPI_STATUS 2244 acpi_SetIntrModel(int model) 2245 { 2246 2247 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 2248 } 2249 2250 /* 2251 * Walk subtables of a table and call a callback routine for each 2252 * subtable. The caller should provide the first subtable and a 2253 * pointer to the end of the table. This can be used to walk tables 2254 * such as MADT and SRAT that use subtable entries. 2255 */ 2256 void 2257 acpi_walk_subtables(void *first, void *end, acpi_subtable_handler *handler, 2258 void *arg) 2259 { 2260 ACPI_SUBTABLE_HEADER *entry; 2261 2262 for (entry = first; (void *)entry < end; ) { 2263 /* Avoid an infinite loop if we hit a bogus entry. */ 2264 if (entry->Length < sizeof(ACPI_SUBTABLE_HEADER)) 2265 return; 2266 2267 handler(entry, arg); 2268 entry = ACPI_ADD_PTR(ACPI_SUBTABLE_HEADER, entry, entry->Length); 2269 } 2270 } 2271 2272 /* 2273 * DEPRECATED. This interface has serious deficiencies and will be 2274 * removed. 2275 * 2276 * Immediately enter the sleep state. In the old model, acpiconf(8) ran 2277 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this. 2278 */ 2279 ACPI_STATUS 2280 acpi_SetSleepState(struct acpi_softc *sc, int state) 2281 { 2282 static int once; 2283 2284 if (!once) { 2285 device_printf(sc->acpi_dev, 2286 "warning: acpi_SetSleepState() deprecated, need to update your software\n"); 2287 once = 1; 2288 } 2289 return (acpi_EnterSleepState(sc, state)); 2290 } 2291 2292 #if defined(__amd64__) || defined(__i386__) 2293 static void 2294 acpi_sleep_force(void *arg) 2295 { 2296 struct acpi_softc *sc = (struct acpi_softc *)arg; 2297 2298 device_printf(sc->acpi_dev, 2299 "suspend request timed out, forcing sleep now\n"); 2300 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2301 device_printf(sc->acpi_dev, "force sleep state S%d failed\n", 2302 sc->acpi_next_sstate); 2303 } 2304 #endif 2305 2306 /* 2307 * Request that the system enter the given suspend state. All /dev/apm 2308 * devices and devd(8) will be notified. Userland then has a chance to 2309 * save state and acknowledge the request. The system sleeps once all 2310 * acks are in. 2311 */ 2312 int 2313 acpi_ReqSleepState(struct acpi_softc *sc, int state) 2314 { 2315 #if defined(__amd64__) || defined(__i386__) 2316 struct apm_clone_data *clone; 2317 ACPI_STATUS status; 2318 2319 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX) 2320 return (EINVAL); 2321 if (!acpi_sleep_states[state]) 2322 return (EOPNOTSUPP); 2323 2324 ACPI_LOCK(acpi); 2325 2326 /* If a suspend request is already in progress, just return. */ 2327 if (sc->acpi_next_sstate != 0) { 2328 ACPI_UNLOCK(acpi); 2329 return (0); 2330 } 2331 2332 /* S5 (soft-off) should be entered directly with no waiting. */ 2333 if (state == ACPI_STATE_S5) { 2334 ACPI_UNLOCK(acpi); 2335 status = acpi_EnterSleepState(sc, state); 2336 return (ACPI_SUCCESS(status) ? 0 : ENXIO); 2337 } 2338 2339 /* Record the pending state and notify all apm devices. */ 2340 sc->acpi_next_sstate = state; 2341 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2342 clone->notify_status = APM_EV_NONE; 2343 if ((clone->flags & ACPI_EVF_DEVD) == 0) { 2344 selwakeuppri(&clone->sel_read, PZERO); 2345 KNOTE_LOCKED(&clone->sel_read.si_note, 0); 2346 } 2347 } 2348 2349 /* If devd(8) is not running, immediately enter the sleep state. */ 2350 if (!devctl_process_running()) { 2351 ACPI_UNLOCK(acpi); 2352 status = acpi_EnterSleepState(sc, state); 2353 return (ACPI_SUCCESS(status) ? 0 : ENXIO); 2354 } 2355 2356 /* 2357 * Set a timeout to fire if userland doesn't ack the suspend request 2358 * in time. This way we still eventually go to sleep if we were 2359 * overheating or running low on battery, even if userland is hung. 2360 * We cancel this timeout once all userland acks are in or the 2361 * suspend request is aborted. 2362 */ 2363 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc); 2364 ACPI_UNLOCK(acpi); 2365 2366 /* Now notify devd(8) also. */ 2367 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state); 2368 2369 return (0); 2370 #else 2371 /* This platform does not support acpi suspend/resume. */ 2372 return (EOPNOTSUPP); 2373 #endif 2374 } 2375 2376 /* 2377 * Acknowledge (or reject) a pending sleep state. The caller has 2378 * prepared for suspend and is now ready for it to proceed. If the 2379 * error argument is non-zero, it indicates suspend should be cancelled 2380 * and gives an errno value describing why. Once all votes are in, 2381 * we suspend the system. 2382 */ 2383 int 2384 acpi_AckSleepState(struct apm_clone_data *clone, int error) 2385 { 2386 #if defined(__amd64__) || defined(__i386__) 2387 struct acpi_softc *sc; 2388 int ret, sleeping; 2389 2390 /* If no pending sleep state, return an error. */ 2391 ACPI_LOCK(acpi); 2392 sc = clone->acpi_sc; 2393 if (sc->acpi_next_sstate == 0) { 2394 ACPI_UNLOCK(acpi); 2395 return (ENXIO); 2396 } 2397 2398 /* Caller wants to abort suspend process. */ 2399 if (error) { 2400 sc->acpi_next_sstate = 0; 2401 callout_stop(&sc->susp_force_to); 2402 device_printf(sc->acpi_dev, 2403 "listener on %s cancelled the pending suspend\n", 2404 devtoname(clone->cdev)); 2405 ACPI_UNLOCK(acpi); 2406 return (0); 2407 } 2408 2409 /* 2410 * Mark this device as acking the suspend request. Then, walk through 2411 * all devices, seeing if they agree yet. We only count devices that 2412 * are writable since read-only devices couldn't ack the request. 2413 */ 2414 sleeping = TRUE; 2415 clone->notify_status = APM_EV_ACKED; 2416 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2417 if ((clone->flags & ACPI_EVF_WRITE) != 0 && 2418 clone->notify_status != APM_EV_ACKED) { 2419 sleeping = FALSE; 2420 break; 2421 } 2422 } 2423 2424 /* If all devices have voted "yes", we will suspend now. */ 2425 if (sleeping) 2426 callout_stop(&sc->susp_force_to); 2427 ACPI_UNLOCK(acpi); 2428 ret = 0; 2429 if (sleeping) { 2430 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2431 ret = ENODEV; 2432 } 2433 return (ret); 2434 #else 2435 /* This platform does not support acpi suspend/resume. */ 2436 return (EOPNOTSUPP); 2437 #endif 2438 } 2439 2440 static void 2441 acpi_sleep_enable(void *arg) 2442 { 2443 struct acpi_softc *sc = (struct acpi_softc *)arg; 2444 2445 /* Reschedule if the system is not fully up and running. */ 2446 if (!AcpiGbl_SystemAwakeAndRunning) { 2447 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); 2448 return; 2449 } 2450 2451 ACPI_LOCK(acpi); 2452 sc->acpi_sleep_disabled = FALSE; 2453 ACPI_UNLOCK(acpi); 2454 } 2455 2456 static ACPI_STATUS 2457 acpi_sleep_disable(struct acpi_softc *sc) 2458 { 2459 ACPI_STATUS status; 2460 2461 /* Fail if the system is not fully up and running. */ 2462 if (!AcpiGbl_SystemAwakeAndRunning) 2463 return (AE_ERROR); 2464 2465 ACPI_LOCK(acpi); 2466 status = sc->acpi_sleep_disabled ? AE_ERROR : AE_OK; 2467 sc->acpi_sleep_disabled = TRUE; 2468 ACPI_UNLOCK(acpi); 2469 2470 return (status); 2471 } 2472 2473 enum acpi_sleep_state { 2474 ACPI_SS_NONE, 2475 ACPI_SS_GPE_SET, 2476 ACPI_SS_DEV_SUSPEND, 2477 ACPI_SS_SLP_PREP, 2478 ACPI_SS_SLEPT, 2479 }; 2480 2481 /* 2482 * Enter the desired system sleep state. 2483 * 2484 * Currently we support S1-S5 but S4 is only S4BIOS 2485 */ 2486 static ACPI_STATUS 2487 acpi_EnterSleepState(struct acpi_softc *sc, int state) 2488 { 2489 ACPI_STATUS status; 2490 enum acpi_sleep_state slp_state; 2491 2492 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2493 2494 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX) 2495 return_ACPI_STATUS (AE_BAD_PARAMETER); 2496 if (!acpi_sleep_states[state]) { 2497 device_printf(sc->acpi_dev, "Sleep state S%d not supported by BIOS\n", 2498 state); 2499 return (AE_SUPPORT); 2500 } 2501 2502 /* Re-entry once we're suspending is not allowed. */ 2503 status = acpi_sleep_disable(sc); 2504 if (ACPI_FAILURE(status)) { 2505 device_printf(sc->acpi_dev, 2506 "suspend request ignored (not ready yet)\n"); 2507 return (status); 2508 } 2509 2510 if (state == ACPI_STATE_S5) { 2511 /* 2512 * Shut down cleanly and power off. This will call us back through the 2513 * shutdown handlers. 2514 */ 2515 shutdown_nice(RB_POWEROFF); 2516 return_ACPI_STATUS (AE_OK); 2517 } 2518 2519 if (smp_started) { 2520 thread_lock(curthread); 2521 sched_bind(curthread, 0); 2522 thread_unlock(curthread); 2523 } 2524 2525 /* 2526 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE 2527 * drivers need this. 2528 */ 2529 mtx_lock(&Giant); 2530 2531 slp_state = ACPI_SS_NONE; 2532 2533 sc->acpi_sstate = state; 2534 2535 /* Enable any GPEs as appropriate and requested by the user. */ 2536 acpi_wake_prep_walk(state); 2537 slp_state = ACPI_SS_GPE_SET; 2538 2539 /* 2540 * Inform all devices that we are going to sleep. If at least one 2541 * device fails, DEVICE_SUSPEND() automatically resumes the tree. 2542 * 2543 * XXX Note that a better two-pass approach with a 'veto' pass 2544 * followed by a "real thing" pass would be better, but the current 2545 * bus interface does not provide for this. 2546 */ 2547 if (DEVICE_SUSPEND(root_bus) != 0) { 2548 device_printf(sc->acpi_dev, "device_suspend failed\n"); 2549 goto backout; 2550 } 2551 slp_state = ACPI_SS_DEV_SUSPEND; 2552 2553 /* If testing device suspend only, back out of everything here. */ 2554 if (acpi_susp_bounce) 2555 goto backout; 2556 2557 status = AcpiEnterSleepStatePrep(state); 2558 if (ACPI_FAILURE(status)) { 2559 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2560 AcpiFormatException(status)); 2561 goto backout; 2562 } 2563 slp_state = ACPI_SS_SLP_PREP; 2564 2565 if (sc->acpi_sleep_delay > 0) 2566 DELAY(sc->acpi_sleep_delay * 1000000); 2567 2568 if (state != ACPI_STATE_S1) { 2569 acpi_sleep_machdep(sc, state); 2570 2571 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 2572 if (state == ACPI_STATE_S4) 2573 AcpiEnable(); 2574 } else { 2575 ACPI_DISABLE_IRQS(); 2576 status = AcpiEnterSleepState(state); 2577 if (ACPI_FAILURE(status)) { 2578 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 2579 AcpiFormatException(status)); 2580 goto backout; 2581 } 2582 } 2583 slp_state = ACPI_SS_SLEPT; 2584 2585 /* 2586 * Back out state according to how far along we got in the suspend 2587 * process. This handles both the error and success cases. 2588 */ 2589 backout: 2590 if (slp_state >= ACPI_SS_GPE_SET) { 2591 acpi_wake_prep_walk(state); 2592 sc->acpi_sstate = ACPI_STATE_S0; 2593 } 2594 if (slp_state >= ACPI_SS_SLP_PREP) 2595 AcpiLeaveSleepState(state); 2596 if (slp_state >= ACPI_SS_DEV_SUSPEND) 2597 DEVICE_RESUME(root_bus); 2598 if (slp_state >= ACPI_SS_SLEPT) 2599 acpi_enable_fixed_events(sc); 2600 sc->acpi_next_sstate = 0; 2601 2602 mtx_unlock(&Giant); 2603 2604 if (smp_started) { 2605 thread_lock(curthread); 2606 sched_unbind(curthread); 2607 thread_unlock(curthread); 2608 } 2609 2610 /* Allow another sleep request after a while. */ 2611 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); 2612 2613 /* Run /etc/rc.resume after we are back. */ 2614 if (devctl_process_running()) 2615 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state); 2616 2617 return_ACPI_STATUS (status); 2618 } 2619 2620 void 2621 acpi_resync_clock(struct acpi_softc *sc) 2622 { 2623 2624 if (!acpi_reset_clock) 2625 return; 2626 2627 /* 2628 * Warm up timecounter again and reset system clock. 2629 */ 2630 (void)timecounter->tc_get_timecount(timecounter); 2631 (void)timecounter->tc_get_timecount(timecounter); 2632 inittodr(time_second + sc->acpi_sleep_delay); 2633 } 2634 2635 /* Enable or disable the device's wake GPE. */ 2636 int 2637 acpi_wake_set_enable(device_t dev, int enable) 2638 { 2639 struct acpi_prw_data prw; 2640 ACPI_STATUS status; 2641 int flags; 2642 2643 /* Make sure the device supports waking the system and get the GPE. */ 2644 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 2645 return (ENXIO); 2646 2647 flags = acpi_get_flags(dev); 2648 if (enable) { 2649 status = AcpiGpeWakeup(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_ENABLE); 2650 if (ACPI_FAILURE(status)) { 2651 device_printf(dev, "enable wake failed\n"); 2652 return (ENXIO); 2653 } 2654 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); 2655 } else { 2656 status = AcpiGpeWakeup(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_DISABLE); 2657 if (ACPI_FAILURE(status)) { 2658 device_printf(dev, "disable wake failed\n"); 2659 return (ENXIO); 2660 } 2661 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); 2662 } 2663 2664 return (0); 2665 } 2666 2667 static int 2668 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate) 2669 { 2670 struct acpi_prw_data prw; 2671 device_t dev; 2672 2673 /* Check that this is a wake-capable device and get its GPE. */ 2674 if (acpi_parse_prw(handle, &prw) != 0) 2675 return (ENXIO); 2676 dev = acpi_get_device(handle); 2677 2678 /* 2679 * The destination sleep state must be less than (i.e., higher power) 2680 * or equal to the value specified by _PRW. If this GPE cannot be 2681 * enabled for the next sleep state, then disable it. If it can and 2682 * the user requested it be enabled, turn on any required power resources 2683 * and set _PSW. 2684 */ 2685 if (sstate > prw.lowest_wake) { 2686 AcpiGpeWakeup(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_DISABLE); 2687 if (bootverbose) 2688 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n", 2689 acpi_name(handle), sstate); 2690 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) { 2691 acpi_pwr_wake_enable(handle, 1); 2692 acpi_SetInteger(handle, "_PSW", 1); 2693 if (bootverbose) 2694 device_printf(dev, "wake_prep enabled for %s (S%d)\n", 2695 acpi_name(handle), sstate); 2696 } 2697 2698 return (0); 2699 } 2700 2701 static int 2702 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate) 2703 { 2704 struct acpi_prw_data prw; 2705 device_t dev; 2706 2707 /* 2708 * Check that this is a wake-capable device and get its GPE. Return 2709 * now if the user didn't enable this device for wake. 2710 */ 2711 if (acpi_parse_prw(handle, &prw) != 0) 2712 return (ENXIO); 2713 dev = acpi_get_device(handle); 2714 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0) 2715 return (0); 2716 2717 /* 2718 * If this GPE couldn't be enabled for the previous sleep state, it was 2719 * disabled before going to sleep so re-enable it. If it was enabled, 2720 * clear _PSW and turn off any power resources it used. 2721 */ 2722 if (sstate > prw.lowest_wake) { 2723 AcpiGpeWakeup(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_ENABLE); 2724 if (bootverbose) 2725 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle)); 2726 } else { 2727 acpi_SetInteger(handle, "_PSW", 0); 2728 acpi_pwr_wake_enable(handle, 0); 2729 if (bootverbose) 2730 device_printf(dev, "run_prep cleaned up for %s\n", 2731 acpi_name(handle)); 2732 } 2733 2734 return (0); 2735 } 2736 2737 static ACPI_STATUS 2738 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 2739 { 2740 int sstate; 2741 2742 /* If suspending, run the sleep prep function, otherwise wake. */ 2743 sstate = *(int *)context; 2744 if (AcpiGbl_SystemAwakeAndRunning) 2745 acpi_wake_sleep_prep(handle, sstate); 2746 else 2747 acpi_wake_run_prep(handle, sstate); 2748 return (AE_OK); 2749 } 2750 2751 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */ 2752 static int 2753 acpi_wake_prep_walk(int sstate) 2754 { 2755 ACPI_HANDLE sb_handle; 2756 2757 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) 2758 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100, 2759 acpi_wake_prep, NULL, &sstate, NULL); 2760 return (0); 2761 } 2762 2763 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */ 2764 static int 2765 acpi_wake_sysctl_walk(device_t dev) 2766 { 2767 int error, i, numdevs; 2768 device_t *devlist; 2769 device_t child; 2770 ACPI_STATUS status; 2771 2772 error = device_get_children(dev, &devlist, &numdevs); 2773 if (error != 0 || numdevs == 0) { 2774 if (numdevs == 0) 2775 free(devlist, M_TEMP); 2776 return (error); 2777 } 2778 for (i = 0; i < numdevs; i++) { 2779 child = devlist[i]; 2780 acpi_wake_sysctl_walk(child); 2781 if (!device_is_attached(child)) 2782 continue; 2783 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL); 2784 if (ACPI_SUCCESS(status)) { 2785 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child), 2786 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO, 2787 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0, 2788 acpi_wake_set_sysctl, "I", "Device set to wake the system"); 2789 } 2790 } 2791 free(devlist, M_TEMP); 2792 2793 return (0); 2794 } 2795 2796 /* Enable or disable wake from userland. */ 2797 static int 2798 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS) 2799 { 2800 int enable, error; 2801 device_t dev; 2802 2803 dev = (device_t)arg1; 2804 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0; 2805 2806 error = sysctl_handle_int(oidp, &enable, 0, req); 2807 if (error != 0 || req->newptr == NULL) 2808 return (error); 2809 if (enable != 0 && enable != 1) 2810 return (EINVAL); 2811 2812 return (acpi_wake_set_enable(dev, enable)); 2813 } 2814 2815 /* Parse a device's _PRW into a structure. */ 2816 int 2817 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) 2818 { 2819 ACPI_STATUS status; 2820 ACPI_BUFFER prw_buffer; 2821 ACPI_OBJECT *res, *res2; 2822 int error, i, power_count; 2823 2824 if (h == NULL || prw == NULL) 2825 return (EINVAL); 2826 2827 /* 2828 * The _PRW object (7.2.9) is only required for devices that have the 2829 * ability to wake the system from a sleeping state. 2830 */ 2831 error = EINVAL; 2832 prw_buffer.Pointer = NULL; 2833 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 2834 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 2835 if (ACPI_FAILURE(status)) 2836 return (ENOENT); 2837 res = (ACPI_OBJECT *)prw_buffer.Pointer; 2838 if (res == NULL) 2839 return (ENOENT); 2840 if (!ACPI_PKG_VALID(res, 2)) 2841 goto out; 2842 2843 /* 2844 * Element 1 of the _PRW object: 2845 * The lowest power system sleeping state that can be entered while still 2846 * providing wake functionality. The sleeping state being entered must 2847 * be less than (i.e., higher power) or equal to this value. 2848 */ 2849 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) 2850 goto out; 2851 2852 /* 2853 * Element 0 of the _PRW object: 2854 */ 2855 switch (res->Package.Elements[0].Type) { 2856 case ACPI_TYPE_INTEGER: 2857 /* 2858 * If the data type of this package element is numeric, then this 2859 * _PRW package element is the bit index in the GPEx_EN, in the 2860 * GPE blocks described in the FADT, of the enable bit that is 2861 * enabled for the wake event. 2862 */ 2863 prw->gpe_handle = NULL; 2864 prw->gpe_bit = res->Package.Elements[0].Integer.Value; 2865 error = 0; 2866 break; 2867 case ACPI_TYPE_PACKAGE: 2868 /* 2869 * If the data type of this package element is a package, then this 2870 * _PRW package element is itself a package containing two 2871 * elements. The first is an object reference to the GPE Block 2872 * device that contains the GPE that will be triggered by the wake 2873 * event. The second element is numeric and it contains the bit 2874 * index in the GPEx_EN, in the GPE Block referenced by the 2875 * first element in the package, of the enable bit that is enabled for 2876 * the wake event. 2877 * 2878 * For example, if this field is a package then it is of the form: 2879 * Package() {\_SB.PCI0.ISA.GPE, 2} 2880 */ 2881 res2 = &res->Package.Elements[0]; 2882 if (!ACPI_PKG_VALID(res2, 2)) 2883 goto out; 2884 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 2885 if (prw->gpe_handle == NULL) 2886 goto out; 2887 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) 2888 goto out; 2889 error = 0; 2890 break; 2891 default: 2892 goto out; 2893 } 2894 2895 /* Elements 2 to N of the _PRW object are power resources. */ 2896 power_count = res->Package.Count - 2; 2897 if (power_count > ACPI_PRW_MAX_POWERRES) { 2898 printf("ACPI device %s has too many power resources\n", acpi_name(h)); 2899 power_count = 0; 2900 } 2901 prw->power_res_count = power_count; 2902 for (i = 0; i < power_count; i++) 2903 prw->power_res[i] = res->Package.Elements[i]; 2904 2905 out: 2906 if (prw_buffer.Pointer != NULL) 2907 AcpiOsFree(prw_buffer.Pointer); 2908 return (error); 2909 } 2910 2911 /* 2912 * ACPI Event Handlers 2913 */ 2914 2915 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 2916 2917 static void 2918 acpi_system_eventhandler_sleep(void *arg, int state) 2919 { 2920 struct acpi_softc *sc = (struct acpi_softc *)arg; 2921 int ret; 2922 2923 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2924 2925 /* Check if button action is disabled or unknown. */ 2926 if (state == ACPI_STATE_UNKNOWN) 2927 return; 2928 2929 /* Request that the system prepare to enter the given suspend state. */ 2930 ret = acpi_ReqSleepState(sc, state); 2931 if (ret != 0) 2932 device_printf(sc->acpi_dev, 2933 "request to enter state S%d failed (err %d)\n", state, ret); 2934 2935 return_VOID; 2936 } 2937 2938 static void 2939 acpi_system_eventhandler_wakeup(void *arg, int state) 2940 { 2941 2942 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2943 2944 /* Currently, nothing to do for wakeup. */ 2945 2946 return_VOID; 2947 } 2948 2949 /* 2950 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 2951 */ 2952 UINT32 2953 acpi_event_power_button_sleep(void *context) 2954 { 2955 struct acpi_softc *sc = (struct acpi_softc *)context; 2956 2957 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2958 2959 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 2960 2961 return_VALUE (ACPI_INTERRUPT_HANDLED); 2962 } 2963 2964 UINT32 2965 acpi_event_power_button_wake(void *context) 2966 { 2967 struct acpi_softc *sc = (struct acpi_softc *)context; 2968 2969 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2970 2971 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 2972 2973 return_VALUE (ACPI_INTERRUPT_HANDLED); 2974 } 2975 2976 UINT32 2977 acpi_event_sleep_button_sleep(void *context) 2978 { 2979 struct acpi_softc *sc = (struct acpi_softc *)context; 2980 2981 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2982 2983 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 2984 2985 return_VALUE (ACPI_INTERRUPT_HANDLED); 2986 } 2987 2988 UINT32 2989 acpi_event_sleep_button_wake(void *context) 2990 { 2991 struct acpi_softc *sc = (struct acpi_softc *)context; 2992 2993 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2994 2995 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 2996 2997 return_VALUE (ACPI_INTERRUPT_HANDLED); 2998 } 2999 3000 /* 3001 * XXX This static buffer is suboptimal. There is no locking so only 3002 * use this for single-threaded callers. 3003 */ 3004 char * 3005 acpi_name(ACPI_HANDLE handle) 3006 { 3007 ACPI_BUFFER buf; 3008 static char data[256]; 3009 3010 buf.Length = sizeof(data); 3011 buf.Pointer = data; 3012 3013 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf))) 3014 return (data); 3015 return ("(unknown)"); 3016 } 3017 3018 /* 3019 * Debugging/bug-avoidance. Avoid trying to fetch info on various 3020 * parts of the namespace. 3021 */ 3022 int 3023 acpi_avoid(ACPI_HANDLE handle) 3024 { 3025 char *cp, *env, *np; 3026 int len; 3027 3028 np = acpi_name(handle); 3029 if (*np == '\\') 3030 np++; 3031 if ((env = getenv("debug.acpi.avoid")) == NULL) 3032 return (0); 3033 3034 /* Scan the avoid list checking for a match */ 3035 cp = env; 3036 for (;;) { 3037 while (*cp != 0 && isspace(*cp)) 3038 cp++; 3039 if (*cp == 0) 3040 break; 3041 len = 0; 3042 while (cp[len] != 0 && !isspace(cp[len])) 3043 len++; 3044 if (!strncmp(cp, np, len)) { 3045 freeenv(env); 3046 return(1); 3047 } 3048 cp += len; 3049 } 3050 freeenv(env); 3051 3052 return (0); 3053 } 3054 3055 /* 3056 * Debugging/bug-avoidance. Disable ACPI subsystem components. 3057 */ 3058 int 3059 acpi_disabled(char *subsys) 3060 { 3061 char *cp, *env; 3062 int len; 3063 3064 if ((env = getenv("debug.acpi.disabled")) == NULL) 3065 return (0); 3066 if (strcmp(env, "all") == 0) { 3067 freeenv(env); 3068 return (1); 3069 } 3070 3071 /* Scan the disable list, checking for a match. */ 3072 cp = env; 3073 for (;;) { 3074 while (*cp != '\0' && isspace(*cp)) 3075 cp++; 3076 if (*cp == '\0') 3077 break; 3078 len = 0; 3079 while (cp[len] != '\0' && !isspace(cp[len])) 3080 len++; 3081 if (strncmp(cp, subsys, len) == 0) { 3082 freeenv(env); 3083 return (1); 3084 } 3085 cp += len; 3086 } 3087 freeenv(env); 3088 3089 return (0); 3090 } 3091 3092 /* 3093 * Control interface. 3094 * 3095 * We multiplex ioctls for all participating ACPI devices here. Individual 3096 * drivers wanting to be accessible via /dev/acpi should use the 3097 * register/deregister interface to make their handlers visible. 3098 */ 3099 struct acpi_ioctl_hook 3100 { 3101 TAILQ_ENTRY(acpi_ioctl_hook) link; 3102 u_long cmd; 3103 acpi_ioctl_fn fn; 3104 void *arg; 3105 }; 3106 3107 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 3108 static int acpi_ioctl_hooks_initted; 3109 3110 int 3111 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 3112 { 3113 struct acpi_ioctl_hook *hp; 3114 3115 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 3116 return (ENOMEM); 3117 hp->cmd = cmd; 3118 hp->fn = fn; 3119 hp->arg = arg; 3120 3121 ACPI_LOCK(acpi); 3122 if (acpi_ioctl_hooks_initted == 0) { 3123 TAILQ_INIT(&acpi_ioctl_hooks); 3124 acpi_ioctl_hooks_initted = 1; 3125 } 3126 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 3127 ACPI_UNLOCK(acpi); 3128 3129 return (0); 3130 } 3131 3132 void 3133 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 3134 { 3135 struct acpi_ioctl_hook *hp; 3136 3137 ACPI_LOCK(acpi); 3138 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 3139 if (hp->cmd == cmd && hp->fn == fn) 3140 break; 3141 3142 if (hp != NULL) { 3143 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 3144 free(hp, M_ACPIDEV); 3145 } 3146 ACPI_UNLOCK(acpi); 3147 } 3148 3149 static int 3150 acpiopen(struct cdev *dev, int flag, int fmt, struct thread *td) 3151 { 3152 return (0); 3153 } 3154 3155 static int 3156 acpiclose(struct cdev *dev, int flag, int fmt, struct thread *td) 3157 { 3158 return (0); 3159 } 3160 3161 static int 3162 acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 3163 { 3164 struct acpi_softc *sc; 3165 struct acpi_ioctl_hook *hp; 3166 int error, state; 3167 3168 error = 0; 3169 hp = NULL; 3170 sc = dev->si_drv1; 3171 3172 /* 3173 * Scan the list of registered ioctls, looking for handlers. 3174 */ 3175 ACPI_LOCK(acpi); 3176 if (acpi_ioctl_hooks_initted) 3177 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 3178 if (hp->cmd == cmd) 3179 break; 3180 } 3181 ACPI_UNLOCK(acpi); 3182 if (hp) 3183 return (hp->fn(cmd, addr, hp->arg)); 3184 3185 /* 3186 * Core ioctls are not permitted for non-writable user. 3187 * Currently, other ioctls just fetch information. 3188 * Not changing system behavior. 3189 */ 3190 if ((flag & FWRITE) == 0) 3191 return (EPERM); 3192 3193 /* Core system ioctls. */ 3194 switch (cmd) { 3195 case ACPIIO_REQSLPSTATE: 3196 state = *(int *)addr; 3197 if (state != ACPI_STATE_S5) 3198 return (acpi_ReqSleepState(sc, state)); 3199 device_printf(sc->acpi_dev, "power off via acpi ioctl not supported\n"); 3200 error = EOPNOTSUPP; 3201 break; 3202 case ACPIIO_ACKSLPSTATE: 3203 error = *(int *)addr; 3204 error = acpi_AckSleepState(sc->acpi_clone, error); 3205 break; 3206 case ACPIIO_SETSLPSTATE: /* DEPRECATED */ 3207 state = *(int *)addr; 3208 if (state < ACPI_STATE_S0 || state > ACPI_S_STATES_MAX) 3209 return (EINVAL); 3210 if (!acpi_sleep_states[state]) 3211 return (EOPNOTSUPP); 3212 if (ACPI_FAILURE(acpi_SetSleepState(sc, state))) 3213 error = ENXIO; 3214 break; 3215 default: 3216 error = ENXIO; 3217 break; 3218 } 3219 3220 return (error); 3221 } 3222 3223 static int 3224 acpi_sname2sstate(const char *sname) 3225 { 3226 int sstate; 3227 3228 if (toupper(sname[0]) == 'S') { 3229 sstate = sname[1] - '0'; 3230 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5 && 3231 sname[2] == '\0') 3232 return (sstate); 3233 } else if (strcasecmp(sname, "NONE") == 0) 3234 return (ACPI_STATE_UNKNOWN); 3235 return (-1); 3236 } 3237 3238 static const char * 3239 acpi_sstate2sname(int sstate) 3240 { 3241 static const char *snames[] = { "S0", "S1", "S2", "S3", "S4", "S5" }; 3242 3243 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5) 3244 return (snames[sstate]); 3245 else if (sstate == ACPI_STATE_UNKNOWN) 3246 return ("NONE"); 3247 return (NULL); 3248 } 3249 3250 static int 3251 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3252 { 3253 int error; 3254 struct sbuf sb; 3255 UINT8 state; 3256 3257 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND); 3258 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++) 3259 if (acpi_sleep_states[state]) 3260 sbuf_printf(&sb, "%s ", acpi_sstate2sname(state)); 3261 sbuf_trim(&sb); 3262 sbuf_finish(&sb); 3263 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 3264 sbuf_delete(&sb); 3265 return (error); 3266 } 3267 3268 static int 3269 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3270 { 3271 char sleep_state[10]; 3272 int error, new_state, old_state; 3273 3274 old_state = *(int *)oidp->oid_arg1; 3275 strlcpy(sleep_state, acpi_sstate2sname(old_state), sizeof(sleep_state)); 3276 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 3277 if (error == 0 && req->newptr != NULL) { 3278 new_state = acpi_sname2sstate(sleep_state); 3279 if (new_state < ACPI_STATE_S1) 3280 return (EINVAL); 3281 if (new_state < ACPI_S_STATE_COUNT && !acpi_sleep_states[new_state]) 3282 return (EOPNOTSUPP); 3283 if (new_state != old_state) 3284 *(int *)oidp->oid_arg1 = new_state; 3285 } 3286 return (error); 3287 } 3288 3289 /* Inform devctl(4) when we receive a Notify. */ 3290 void 3291 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 3292 { 3293 char notify_buf[16]; 3294 ACPI_BUFFER handle_buf; 3295 ACPI_STATUS status; 3296 3297 if (subsystem == NULL) 3298 return; 3299 3300 handle_buf.Pointer = NULL; 3301 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 3302 status = AcpiNsHandleToPathname(h, &handle_buf); 3303 if (ACPI_FAILURE(status)) 3304 return; 3305 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 3306 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 3307 AcpiOsFree(handle_buf.Pointer); 3308 } 3309 3310 #ifdef ACPI_DEBUG 3311 /* 3312 * Support for parsing debug options from the kernel environment. 3313 * 3314 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 3315 * by specifying the names of the bits in the debug.acpi.layer and 3316 * debug.acpi.level environment variables. Bits may be unset by 3317 * prefixing the bit name with !. 3318 */ 3319 struct debugtag 3320 { 3321 char *name; 3322 UINT32 value; 3323 }; 3324 3325 static struct debugtag dbg_layer[] = { 3326 {"ACPI_UTILITIES", ACPI_UTILITIES}, 3327 {"ACPI_HARDWARE", ACPI_HARDWARE}, 3328 {"ACPI_EVENTS", ACPI_EVENTS}, 3329 {"ACPI_TABLES", ACPI_TABLES}, 3330 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 3331 {"ACPI_PARSER", ACPI_PARSER}, 3332 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 3333 {"ACPI_EXECUTER", ACPI_EXECUTER}, 3334 {"ACPI_RESOURCES", ACPI_RESOURCES}, 3335 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 3336 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 3337 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 3338 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 3339 3340 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 3341 {"ACPI_BATTERY", ACPI_BATTERY}, 3342 {"ACPI_BUS", ACPI_BUS}, 3343 {"ACPI_BUTTON", ACPI_BUTTON}, 3344 {"ACPI_EC", ACPI_EC}, 3345 {"ACPI_FAN", ACPI_FAN}, 3346 {"ACPI_POWERRES", ACPI_POWERRES}, 3347 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 3348 {"ACPI_THERMAL", ACPI_THERMAL}, 3349 {"ACPI_TIMER", ACPI_TIMER}, 3350 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 3351 {NULL, 0} 3352 }; 3353 3354 static struct debugtag dbg_level[] = { 3355 {"ACPI_LV_INIT", ACPI_LV_INIT}, 3356 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 3357 {"ACPI_LV_INFO", ACPI_LV_INFO}, 3358 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 3359 3360 /* Trace verbosity level 1 [Standard Trace Level] */ 3361 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 3362 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 3363 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 3364 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 3365 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 3366 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 3367 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 3368 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 3369 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 3370 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 3371 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 3372 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 3373 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 3374 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 3375 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 3376 3377 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 3378 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 3379 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 3380 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 3381 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 3382 {"ACPI_LV_ALL", ACPI_LV_ALL}, 3383 3384 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 3385 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 3386 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 3387 {"ACPI_LV_IO", ACPI_LV_IO}, 3388 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 3389 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 3390 3391 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 3392 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 3393 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 3394 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 3395 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 3396 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 3397 {NULL, 0} 3398 }; 3399 3400 static void 3401 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 3402 { 3403 char *ep; 3404 int i, l; 3405 int set; 3406 3407 while (*cp) { 3408 if (isspace(*cp)) { 3409 cp++; 3410 continue; 3411 } 3412 ep = cp; 3413 while (*ep && !isspace(*ep)) 3414 ep++; 3415 if (*cp == '!') { 3416 set = 0; 3417 cp++; 3418 if (cp == ep) 3419 continue; 3420 } else { 3421 set = 1; 3422 } 3423 l = ep - cp; 3424 for (i = 0; tag[i].name != NULL; i++) { 3425 if (!strncmp(cp, tag[i].name, l)) { 3426 if (set) 3427 *flag |= tag[i].value; 3428 else 3429 *flag &= ~tag[i].value; 3430 } 3431 } 3432 cp = ep; 3433 } 3434 } 3435 3436 static void 3437 acpi_set_debugging(void *junk) 3438 { 3439 char *layer, *level; 3440 3441 if (cold) { 3442 AcpiDbgLayer = 0; 3443 AcpiDbgLevel = 0; 3444 } 3445 3446 layer = getenv("debug.acpi.layer"); 3447 level = getenv("debug.acpi.level"); 3448 if (layer == NULL && level == NULL) 3449 return; 3450 3451 printf("ACPI set debug"); 3452 if (layer != NULL) { 3453 if (strcmp("NONE", layer) != 0) 3454 printf(" layer '%s'", layer); 3455 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer); 3456 freeenv(layer); 3457 } 3458 if (level != NULL) { 3459 if (strcmp("NONE", level) != 0) 3460 printf(" level '%s'", level); 3461 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel); 3462 freeenv(level); 3463 } 3464 printf("\n"); 3465 } 3466 3467 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 3468 NULL); 3469 3470 static int 3471 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 3472 { 3473 int error, *dbg; 3474 struct debugtag *tag; 3475 struct sbuf sb; 3476 3477 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 3478 return (ENOMEM); 3479 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 3480 tag = &dbg_layer[0]; 3481 dbg = &AcpiDbgLayer; 3482 } else { 3483 tag = &dbg_level[0]; 3484 dbg = &AcpiDbgLevel; 3485 } 3486 3487 /* Get old values if this is a get request. */ 3488 ACPI_SERIAL_BEGIN(acpi); 3489 if (*dbg == 0) { 3490 sbuf_cpy(&sb, "NONE"); 3491 } else if (req->newptr == NULL) { 3492 for (; tag->name != NULL; tag++) { 3493 if ((*dbg & tag->value) == tag->value) 3494 sbuf_printf(&sb, "%s ", tag->name); 3495 } 3496 } 3497 sbuf_trim(&sb); 3498 sbuf_finish(&sb); 3499 3500 /* Copy out the old values to the user. */ 3501 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb)); 3502 sbuf_delete(&sb); 3503 3504 /* If the user is setting a string, parse it. */ 3505 if (error == 0 && req->newptr != NULL) { 3506 *dbg = 0; 3507 setenv((char *)oidp->oid_arg1, (char *)req->newptr); 3508 acpi_set_debugging(NULL); 3509 } 3510 ACPI_SERIAL_END(acpi); 3511 3512 return (error); 3513 } 3514 3515 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 3516 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 3517 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 3518 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 3519 #endif /* ACPI_DEBUG */ 3520 3521 static int 3522 acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS) 3523 { 3524 int error; 3525 int old; 3526 3527 old = acpi_debug_objects; 3528 error = sysctl_handle_int(oidp, &acpi_debug_objects, 0, req); 3529 if (error != 0 || req->newptr == NULL) 3530 return (error); 3531 if (old == acpi_debug_objects || (old && acpi_debug_objects)) 3532 return (0); 3533 3534 ACPI_SERIAL_BEGIN(acpi); 3535 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE; 3536 ACPI_SERIAL_END(acpi); 3537 3538 return (0); 3539 } 3540 3541 static int 3542 acpi_pm_func(u_long cmd, void *arg, ...) 3543 { 3544 int state, acpi_state; 3545 int error; 3546 struct acpi_softc *sc; 3547 va_list ap; 3548 3549 error = 0; 3550 switch (cmd) { 3551 case POWER_CMD_SUSPEND: 3552 sc = (struct acpi_softc *)arg; 3553 if (sc == NULL) { 3554 error = EINVAL; 3555 goto out; 3556 } 3557 3558 va_start(ap, arg); 3559 state = va_arg(ap, int); 3560 va_end(ap); 3561 3562 switch (state) { 3563 case POWER_SLEEP_STATE_STANDBY: 3564 acpi_state = sc->acpi_standby_sx; 3565 break; 3566 case POWER_SLEEP_STATE_SUSPEND: 3567 acpi_state = sc->acpi_suspend_sx; 3568 break; 3569 case POWER_SLEEP_STATE_HIBERNATE: 3570 acpi_state = ACPI_STATE_S4; 3571 break; 3572 default: 3573 error = EINVAL; 3574 goto out; 3575 } 3576 3577 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state))) 3578 error = ENXIO; 3579 break; 3580 default: 3581 error = EINVAL; 3582 goto out; 3583 } 3584 3585 out: 3586 return (error); 3587 } 3588 3589 static void 3590 acpi_pm_register(void *arg) 3591 { 3592 if (!cold || resource_disabled("acpi", 0)) 3593 return; 3594 3595 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 3596 } 3597 3598 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 3599