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 35 #include <sys/param.h> 36 #include <sys/kernel.h> 37 #include <sys/proc.h> 38 #include <sys/fcntl.h> 39 #include <sys/malloc.h> 40 #include <sys/module.h> 41 #include <sys/bus.h> 42 #include <sys/conf.h> 43 #include <sys/ioccom.h> 44 #include <sys/reboot.h> 45 #include <sys/sysctl.h> 46 #include <sys/ctype.h> 47 #include <sys/linker.h> 48 #include <sys/power.h> 49 #include <sys/sbuf.h> 50 #include <sys/sched.h> 51 #include <sys/smp.h> 52 #include <sys/timetc.h> 53 54 #if defined(__i386__) || defined(__amd64__) 55 #include <machine/pci_cfgreg.h> 56 #endif 57 #include <machine/resource.h> 58 #include <machine/bus.h> 59 #include <sys/rman.h> 60 #include <isa/isavar.h> 61 #include <isa/pnpvar.h> 62 63 #include <contrib/dev/acpica/include/acpi.h> 64 #include <contrib/dev/acpica/include/accommon.h> 65 #include <contrib/dev/acpica/include/acnamesp.h> 66 67 #include <dev/acpica/acpivar.h> 68 #include <dev/acpica/acpiio.h> 69 70 #include <dev/pci/pcivar.h> 71 72 #include <vm/vm_param.h> 73 74 static MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 75 76 /* Hooks for the ACPI CA debugging infrastructure */ 77 #define _COMPONENT ACPI_BUS 78 ACPI_MODULE_NAME("ACPI") 79 80 static d_open_t acpiopen; 81 static d_close_t acpiclose; 82 static d_ioctl_t acpiioctl; 83 84 static struct cdevsw acpi_cdevsw = { 85 .d_version = D_VERSION, 86 .d_open = acpiopen, 87 .d_close = acpiclose, 88 .d_ioctl = acpiioctl, 89 .d_name = "acpi", 90 }; 91 92 struct acpi_interface { 93 ACPI_STRING *data; 94 int num; 95 }; 96 97 static char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 98 static char *pcilink_ids[] = { "PNP0C0F", NULL }; 99 100 /* Global mutex for locking access to the ACPI subsystem. */ 101 struct mtx acpi_mutex; 102 struct callout acpi_sleep_timer; 103 104 /* Bitmap of device quirks. */ 105 int acpi_quirks; 106 107 /* Supported sleep states. */ 108 static BOOLEAN acpi_sleep_states[ACPI_S_STATE_COUNT]; 109 110 static void acpi_lookup(void *arg, const char *name, device_t *dev); 111 static int acpi_modevent(struct module *mod, int event, void *junk); 112 static int acpi_probe(device_t dev); 113 static int acpi_attach(device_t dev); 114 static int acpi_suspend(device_t dev); 115 static int acpi_resume(device_t dev); 116 static int acpi_shutdown(device_t dev); 117 static device_t acpi_add_child(device_t bus, u_int order, const char *name, 118 int unit); 119 static int acpi_print_child(device_t bus, device_t child); 120 static void acpi_probe_nomatch(device_t bus, device_t child); 121 static void acpi_driver_added(device_t dev, driver_t *driver); 122 static int acpi_read_ivar(device_t dev, device_t child, int index, 123 uintptr_t *result); 124 static int acpi_write_ivar(device_t dev, device_t child, int index, 125 uintptr_t value); 126 static struct resource_list *acpi_get_rlist(device_t dev, device_t child); 127 static void acpi_reserve_resources(device_t dev); 128 static int acpi_sysres_alloc(device_t dev); 129 static int acpi_set_resource(device_t dev, device_t child, int type, 130 int rid, rman_res_t start, rman_res_t count); 131 static struct resource *acpi_alloc_resource(device_t bus, device_t child, 132 int type, int *rid, rman_res_t start, rman_res_t end, 133 rman_res_t count, u_int flags); 134 static int acpi_adjust_resource(device_t bus, device_t child, int type, 135 struct resource *r, rman_res_t start, rman_res_t end); 136 static int acpi_release_resource(device_t bus, device_t child, int type, 137 int rid, struct resource *r); 138 static void acpi_delete_resource(device_t bus, device_t child, int type, 139 int rid); 140 static uint32_t acpi_isa_get_logicalid(device_t dev); 141 static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count); 142 static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids); 143 static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev, 144 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters, 145 ACPI_BUFFER *ret); 146 static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, 147 void *context, void **retval); 148 static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev, 149 int max_depth, acpi_scan_cb_t user_fn, void *arg); 150 static int acpi_set_powerstate(device_t child, int state); 151 static int acpi_isa_pnp_probe(device_t bus, device_t child, 152 struct isa_pnp_id *ids); 153 static void acpi_probe_children(device_t bus); 154 static void acpi_probe_order(ACPI_HANDLE handle, int *order); 155 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, 156 void *context, void **status); 157 static void acpi_sleep_enable(void *arg); 158 static ACPI_STATUS acpi_sleep_disable(struct acpi_softc *sc); 159 static ACPI_STATUS acpi_EnterSleepState(struct acpi_softc *sc, int state); 160 static void acpi_shutdown_final(void *arg, int howto); 161 static void acpi_enable_fixed_events(struct acpi_softc *sc); 162 static BOOLEAN acpi_has_hid(ACPI_HANDLE handle); 163 static void acpi_resync_clock(struct acpi_softc *sc); 164 static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate); 165 static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate); 166 static int acpi_wake_prep_walk(int sstate); 167 static int acpi_wake_sysctl_walk(device_t dev); 168 static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS); 169 static void acpi_system_eventhandler_sleep(void *arg, int state); 170 static void acpi_system_eventhandler_wakeup(void *arg, int state); 171 static int acpi_sname2sstate(const char *sname); 172 static const char *acpi_sstate2sname(int sstate); 173 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 174 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 175 static int acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS); 176 static int acpi_pm_func(u_long cmd, void *arg, ...); 177 static int acpi_child_location_str_method(device_t acdev, device_t child, 178 char *buf, size_t buflen); 179 static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child, 180 char *buf, size_t buflen); 181 #if defined(__i386__) || defined(__amd64__) 182 static void acpi_enable_pcie(void); 183 #endif 184 static void acpi_hint_device_unit(device_t acdev, device_t child, 185 const char *name, int *unitp); 186 static void acpi_reset_interfaces(device_t dev); 187 188 static device_method_t acpi_methods[] = { 189 /* Device interface */ 190 DEVMETHOD(device_probe, acpi_probe), 191 DEVMETHOD(device_attach, acpi_attach), 192 DEVMETHOD(device_shutdown, acpi_shutdown), 193 DEVMETHOD(device_detach, bus_generic_detach), 194 DEVMETHOD(device_suspend, acpi_suspend), 195 DEVMETHOD(device_resume, acpi_resume), 196 197 /* Bus interface */ 198 DEVMETHOD(bus_add_child, acpi_add_child), 199 DEVMETHOD(bus_print_child, acpi_print_child), 200 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch), 201 DEVMETHOD(bus_driver_added, acpi_driver_added), 202 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 203 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 204 DEVMETHOD(bus_get_resource_list, acpi_get_rlist), 205 DEVMETHOD(bus_set_resource, acpi_set_resource), 206 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 207 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 208 DEVMETHOD(bus_adjust_resource, acpi_adjust_resource), 209 DEVMETHOD(bus_release_resource, acpi_release_resource), 210 DEVMETHOD(bus_delete_resource, acpi_delete_resource), 211 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method), 212 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method), 213 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 214 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 215 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 216 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 217 DEVMETHOD(bus_hint_device_unit, acpi_hint_device_unit), 218 DEVMETHOD(bus_get_cpus, acpi_get_cpus), 219 DEVMETHOD(bus_get_domain, acpi_get_domain), 220 221 /* ACPI bus */ 222 DEVMETHOD(acpi_id_probe, acpi_device_id_probe), 223 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj), 224 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep), 225 DEVMETHOD(acpi_scan_children, acpi_device_scan_children), 226 227 /* ISA emulation */ 228 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 229 230 DEVMETHOD_END 231 }; 232 233 static driver_t acpi_driver = { 234 "acpi", 235 acpi_methods, 236 sizeof(struct acpi_softc), 237 }; 238 239 static devclass_t acpi_devclass; 240 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0); 241 MODULE_VERSION(acpi, 1); 242 243 ACPI_SERIAL_DECL(acpi, "ACPI root bus"); 244 245 /* Local pools for managing system resources for ACPI child devices. */ 246 static struct rman acpi_rman_io, acpi_rman_mem; 247 248 #define ACPI_MINIMUM_AWAKETIME 5 249 250 /* Holds the description of the acpi0 device. */ 251 static char acpi_desc[ACPI_OEM_ID_SIZE + ACPI_OEM_TABLE_ID_SIZE + 2]; 252 253 SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging"); 254 static char acpi_ca_version[12]; 255 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, 256 acpi_ca_version, 0, "Version of Intel ACPI-CA"); 257 258 /* 259 * Allow overriding _OSI methods. 260 */ 261 static char acpi_install_interface[256]; 262 TUNABLE_STR("hw.acpi.install_interface", acpi_install_interface, 263 sizeof(acpi_install_interface)); 264 static char acpi_remove_interface[256]; 265 TUNABLE_STR("hw.acpi.remove_interface", acpi_remove_interface, 266 sizeof(acpi_remove_interface)); 267 268 /* Allow users to dump Debug objects without ACPI debugger. */ 269 static int acpi_debug_objects; 270 TUNABLE_INT("debug.acpi.enable_debug_objects", &acpi_debug_objects); 271 SYSCTL_PROC(_debug_acpi, OID_AUTO, enable_debug_objects, 272 CTLFLAG_RW | CTLTYPE_INT, NULL, 0, acpi_debug_objects_sysctl, "I", 273 "Enable Debug objects"); 274 275 /* Allow the interpreter to ignore common mistakes in BIOS. */ 276 static int acpi_interpreter_slack = 1; 277 TUNABLE_INT("debug.acpi.interpreter_slack", &acpi_interpreter_slack); 278 SYSCTL_INT(_debug_acpi, OID_AUTO, interpreter_slack, CTLFLAG_RDTUN, 279 &acpi_interpreter_slack, 1, "Turn on interpreter slack mode."); 280 281 /* Ignore register widths set by FADT and use default widths instead. */ 282 static int acpi_ignore_reg_width = 1; 283 TUNABLE_INT("debug.acpi.default_register_width", &acpi_ignore_reg_width); 284 SYSCTL_INT(_debug_acpi, OID_AUTO, default_register_width, CTLFLAG_RDTUN, 285 &acpi_ignore_reg_width, 1, "Ignore register widths set by FADT"); 286 287 /* Allow users to override quirks. */ 288 TUNABLE_INT("debug.acpi.quirks", &acpi_quirks); 289 290 static int acpi_susp_bounce; 291 SYSCTL_INT(_debug_acpi, OID_AUTO, suspend_bounce, CTLFLAG_RW, 292 &acpi_susp_bounce, 0, "Don't actually suspend, just test devices."); 293 294 /* 295 * ACPI can only be loaded as a module by the loader; activating it after 296 * system bootstrap time is not useful, and can be fatal to the system. 297 * It also cannot be unloaded, since the entire system bus hierarchy hangs 298 * off it. 299 */ 300 static int 301 acpi_modevent(struct module *mod, int event, void *junk) 302 { 303 switch (event) { 304 case MOD_LOAD: 305 if (!cold) { 306 printf("The ACPI driver cannot be loaded after boot.\n"); 307 return (EPERM); 308 } 309 break; 310 case MOD_UNLOAD: 311 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 312 return (EBUSY); 313 break; 314 default: 315 break; 316 } 317 return (0); 318 } 319 320 /* 321 * Perform early initialization. 322 */ 323 ACPI_STATUS 324 acpi_Startup(void) 325 { 326 static int started = 0; 327 ACPI_STATUS status; 328 int val; 329 330 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 331 332 /* Only run the startup code once. The MADT driver also calls this. */ 333 if (started) 334 return_VALUE (AE_OK); 335 started = 1; 336 337 /* 338 * Initialize the ACPICA subsystem. 339 */ 340 if (ACPI_FAILURE(status = AcpiInitializeSubsystem())) { 341 printf("ACPI: Could not initialize Subsystem: %s\n", 342 AcpiFormatException(status)); 343 return_VALUE (status); 344 } 345 346 /* 347 * Pre-allocate space for RSDT/XSDT and DSDT tables and allow resizing 348 * if more tables exist. 349 */ 350 if (ACPI_FAILURE(status = AcpiInitializeTables(NULL, 2, TRUE))) { 351 printf("ACPI: Table initialisation failed: %s\n", 352 AcpiFormatException(status)); 353 return_VALUE (status); 354 } 355 356 /* Set up any quirks we have for this system. */ 357 if (acpi_quirks == ACPI_Q_OK) 358 acpi_table_quirks(&acpi_quirks); 359 360 /* If the user manually set the disabled hint to 0, force-enable ACPI. */ 361 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0) 362 acpi_quirks &= ~ACPI_Q_BROKEN; 363 if (acpi_quirks & ACPI_Q_BROKEN) { 364 printf("ACPI disabled by blacklist. Contact your BIOS vendor.\n"); 365 status = AE_SUPPORT; 366 } 367 368 return_VALUE (status); 369 } 370 371 /* 372 * Detect ACPI and perform early initialisation. 373 */ 374 int 375 acpi_identify(void) 376 { 377 ACPI_TABLE_RSDP *rsdp; 378 ACPI_TABLE_HEADER *rsdt; 379 ACPI_PHYSICAL_ADDRESS paddr; 380 struct sbuf sb; 381 382 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 383 384 if (!cold) 385 return (ENXIO); 386 387 /* Check that we haven't been disabled with a hint. */ 388 if (resource_disabled("acpi", 0)) 389 return (ENXIO); 390 391 /* Check for other PM systems. */ 392 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 393 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 394 printf("ACPI identify failed, other PM system enabled.\n"); 395 return (ENXIO); 396 } 397 398 /* Initialize root tables. */ 399 if (ACPI_FAILURE(acpi_Startup())) { 400 printf("ACPI: Try disabling either ACPI or apic support.\n"); 401 return (ENXIO); 402 } 403 404 if ((paddr = AcpiOsGetRootPointer()) == 0 || 405 (rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP))) == NULL) 406 return (ENXIO); 407 if (rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress != 0) 408 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress; 409 else 410 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress; 411 AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP)); 412 413 if ((rsdt = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER))) == NULL) 414 return (ENXIO); 415 sbuf_new(&sb, acpi_desc, sizeof(acpi_desc), SBUF_FIXEDLEN); 416 sbuf_bcat(&sb, rsdt->OemId, ACPI_OEM_ID_SIZE); 417 sbuf_trim(&sb); 418 sbuf_putc(&sb, ' '); 419 sbuf_bcat(&sb, rsdt->OemTableId, ACPI_OEM_TABLE_ID_SIZE); 420 sbuf_trim(&sb); 421 sbuf_finish(&sb); 422 sbuf_delete(&sb); 423 AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER)); 424 425 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%x", ACPI_CA_VERSION); 426 427 return (0); 428 } 429 430 /* 431 * Fetch some descriptive data from ACPI to put in our attach message. 432 */ 433 static int 434 acpi_probe(device_t dev) 435 { 436 437 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 438 439 device_set_desc(dev, acpi_desc); 440 441 return_VALUE (BUS_PROBE_NOWILDCARD); 442 } 443 444 static int 445 acpi_attach(device_t dev) 446 { 447 struct acpi_softc *sc; 448 ACPI_STATUS status; 449 int error, state; 450 UINT32 flags; 451 UINT8 TypeA, TypeB; 452 char *env; 453 454 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 455 456 sc = device_get_softc(dev); 457 sc->acpi_dev = dev; 458 callout_init(&sc->susp_force_to, 1); 459 460 error = ENXIO; 461 462 /* Initialize resource manager. */ 463 acpi_rman_io.rm_type = RMAN_ARRAY; 464 acpi_rman_io.rm_start = 0; 465 acpi_rman_io.rm_end = 0xffff; 466 acpi_rman_io.rm_descr = "ACPI I/O ports"; 467 if (rman_init(&acpi_rman_io) != 0) 468 panic("acpi rman_init IO ports failed"); 469 acpi_rman_mem.rm_type = RMAN_ARRAY; 470 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses"; 471 if (rman_init(&acpi_rman_mem) != 0) 472 panic("acpi rman_init memory failed"); 473 474 /* Initialise the ACPI mutex */ 475 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF); 476 477 /* 478 * Set the globals from our tunables. This is needed because ACPI-CA 479 * uses UINT8 for some values and we have no tunable_byte. 480 */ 481 AcpiGbl_EnableInterpreterSlack = acpi_interpreter_slack ? TRUE : FALSE; 482 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE; 483 AcpiGbl_UseDefaultRegisterWidths = acpi_ignore_reg_width ? TRUE : FALSE; 484 485 #ifndef ACPI_DEBUG 486 /* 487 * Disable all debugging layers and levels. 488 */ 489 AcpiDbgLayer = 0; 490 AcpiDbgLevel = 0; 491 #endif 492 493 /* Override OS interfaces if the user requested. */ 494 acpi_reset_interfaces(dev); 495 496 /* Load ACPI name space. */ 497 status = AcpiLoadTables(); 498 if (ACPI_FAILURE(status)) { 499 device_printf(dev, "Could not load Namespace: %s\n", 500 AcpiFormatException(status)); 501 goto out; 502 } 503 504 #if defined(__i386__) || defined(__amd64__) 505 /* Handle MCFG table if present. */ 506 acpi_enable_pcie(); 507 #endif 508 509 /* 510 * Note that some systems (specifically, those with namespace evaluation 511 * issues that require the avoidance of parts of the namespace) must 512 * avoid running _INI and _STA on everything, as well as dodging the final 513 * object init pass. 514 * 515 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 516 * 517 * XXX We should arrange for the object init pass after we have attached 518 * all our child devices, but on many systems it works here. 519 */ 520 flags = 0; 521 if (testenv("debug.acpi.avoid")) 522 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 523 524 /* Bring the hardware and basic handlers online. */ 525 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 526 device_printf(dev, "Could not enable ACPI: %s\n", 527 AcpiFormatException(status)); 528 goto out; 529 } 530 531 /* 532 * Call the ECDT probe function to provide EC functionality before 533 * the namespace has been evaluated. 534 * 535 * XXX This happens before the sysresource devices have been probed and 536 * attached so its resources come from nexus0. In practice, this isn't 537 * a problem but should be addressed eventually. 538 */ 539 acpi_ec_ecdt_probe(dev); 540 541 /* Bring device objects and regions online. */ 542 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 543 device_printf(dev, "Could not initialize ACPI objects: %s\n", 544 AcpiFormatException(status)); 545 goto out; 546 } 547 548 /* 549 * Setup our sysctl tree. 550 * 551 * XXX: This doesn't check to make sure that none of these fail. 552 */ 553 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 554 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 555 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 556 device_get_name(dev), CTLFLAG_RD, 0, ""); 557 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 558 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 559 0, 0, acpi_supported_sleep_state_sysctl, "A", 560 "List supported ACPI sleep states."); 561 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 562 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 563 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", 564 "Power button ACPI sleep state."); 565 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 566 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 567 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", 568 "Sleep button ACPI sleep state."); 569 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 570 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 571 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", 572 "Lid ACPI sleep state. Set to S3 if you want to suspend your laptop when close the Lid."); 573 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 574 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 575 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 576 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 577 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 578 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 579 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 580 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0, 581 "sleep delay in seconds"); 582 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 583 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode"); 584 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 585 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode"); 586 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 587 OID_AUTO, "disable_on_reboot", CTLFLAG_RW, 588 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system"); 589 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 590 OID_AUTO, "handle_reboot", CTLFLAG_RW, 591 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot"); 592 593 /* 594 * Default to 1 second before sleeping to give some machines time to 595 * stabilize. 596 */ 597 sc->acpi_sleep_delay = 1; 598 if (bootverbose) 599 sc->acpi_verbose = 1; 600 if ((env = kern_getenv("hw.acpi.verbose")) != NULL) { 601 if (strcmp(env, "0") != 0) 602 sc->acpi_verbose = 1; 603 freeenv(env); 604 } 605 606 /* Only enable reboot by default if the FADT says it is available. */ 607 if (AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) 608 sc->acpi_handle_reboot = 1; 609 610 #if !ACPI_REDUCED_HARDWARE 611 /* Only enable S4BIOS by default if the FACS says it is available. */ 612 if (AcpiGbl_FACS != NULL && AcpiGbl_FACS->Flags & ACPI_FACS_S4_BIOS_PRESENT) 613 sc->acpi_s4bios = 1; 614 #endif 615 616 /* Probe all supported sleep states. */ 617 acpi_sleep_states[ACPI_STATE_S0] = TRUE; 618 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++) 619 if (ACPI_SUCCESS(AcpiEvaluateObject(ACPI_ROOT_OBJECT, 620 __DECONST(char *, AcpiGbl_SleepStateNames[state]), NULL, NULL)) && 621 ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) 622 acpi_sleep_states[state] = TRUE; 623 624 /* 625 * Dispatch the default sleep state to devices. The lid switch is set 626 * to UNKNOWN by default to avoid surprising users. 627 */ 628 sc->acpi_power_button_sx = acpi_sleep_states[ACPI_STATE_S5] ? 629 ACPI_STATE_S5 : ACPI_STATE_UNKNOWN; 630 sc->acpi_lid_switch_sx = ACPI_STATE_UNKNOWN; 631 sc->acpi_standby_sx = acpi_sleep_states[ACPI_STATE_S1] ? 632 ACPI_STATE_S1 : ACPI_STATE_UNKNOWN; 633 sc->acpi_suspend_sx = acpi_sleep_states[ACPI_STATE_S3] ? 634 ACPI_STATE_S3 : ACPI_STATE_UNKNOWN; 635 636 /* Pick the first valid sleep state for the sleep button default. */ 637 sc->acpi_sleep_button_sx = ACPI_STATE_UNKNOWN; 638 for (state = ACPI_STATE_S1; state <= ACPI_STATE_S4; state++) 639 if (acpi_sleep_states[state]) { 640 sc->acpi_sleep_button_sx = state; 641 break; 642 } 643 644 acpi_enable_fixed_events(sc); 645 646 /* 647 * Scan the namespace and attach/initialise children. 648 */ 649 650 /* Register our shutdown handler. */ 651 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 652 SHUTDOWN_PRI_LAST); 653 654 /* 655 * Register our acpi event handlers. 656 * XXX should be configurable eg. via userland policy manager. 657 */ 658 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 659 sc, ACPI_EVENT_PRI_LAST); 660 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 661 sc, ACPI_EVENT_PRI_LAST); 662 663 /* Flag our initial states. */ 664 sc->acpi_enabled = TRUE; 665 sc->acpi_sstate = ACPI_STATE_S0; 666 sc->acpi_sleep_disabled = TRUE; 667 668 /* Create the control device */ 669 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644, 670 "acpi"); 671 sc->acpi_dev_t->si_drv1 = sc; 672 673 if ((error = acpi_machdep_init(dev))) 674 goto out; 675 676 /* Register ACPI again to pass the correct argument of pm_func. */ 677 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 678 679 if (!acpi_disabled("bus")) { 680 EVENTHANDLER_REGISTER(dev_lookup, acpi_lookup, NULL, 1000); 681 acpi_probe_children(dev); 682 } 683 684 /* Update all GPEs and enable runtime GPEs. */ 685 status = AcpiUpdateAllGpes(); 686 if (ACPI_FAILURE(status)) 687 device_printf(dev, "Could not update all GPEs: %s\n", 688 AcpiFormatException(status)); 689 690 /* Allow sleep request after a while. */ 691 callout_init_mtx(&acpi_sleep_timer, &acpi_mutex, 0); 692 callout_reset(&acpi_sleep_timer, hz * ACPI_MINIMUM_AWAKETIME, 693 acpi_sleep_enable, sc); 694 695 error = 0; 696 697 out: 698 return_VALUE (error); 699 } 700 701 static void 702 acpi_set_power_children(device_t dev, int state) 703 { 704 device_t child; 705 device_t *devlist; 706 int dstate, i, numdevs; 707 708 if (device_get_children(dev, &devlist, &numdevs) != 0) 709 return; 710 711 /* 712 * Retrieve and set D-state for the sleep state if _SxD is present. 713 * Skip children who aren't attached since they are handled separately. 714 */ 715 for (i = 0; i < numdevs; i++) { 716 child = devlist[i]; 717 dstate = state; 718 if (device_is_attached(child) && 719 acpi_device_pwr_for_sleep(dev, child, &dstate) == 0) 720 acpi_set_powerstate(child, dstate); 721 } 722 free(devlist, M_TEMP); 723 } 724 725 static int 726 acpi_suspend(device_t dev) 727 { 728 int error; 729 730 GIANT_REQUIRED; 731 732 error = bus_generic_suspend(dev); 733 if (error == 0) 734 acpi_set_power_children(dev, ACPI_STATE_D3); 735 736 return (error); 737 } 738 739 static int 740 acpi_resume(device_t dev) 741 { 742 743 GIANT_REQUIRED; 744 745 acpi_set_power_children(dev, ACPI_STATE_D0); 746 747 return (bus_generic_resume(dev)); 748 } 749 750 static int 751 acpi_shutdown(device_t dev) 752 { 753 754 GIANT_REQUIRED; 755 756 /* Allow children to shutdown first. */ 757 bus_generic_shutdown(dev); 758 759 /* 760 * Enable any GPEs that are able to power-on the system (i.e., RTC). 761 * Also, disable any that are not valid for this state (most). 762 */ 763 acpi_wake_prep_walk(ACPI_STATE_S5); 764 765 return (0); 766 } 767 768 /* 769 * Handle a new device being added 770 */ 771 static device_t 772 acpi_add_child(device_t bus, u_int order, const char *name, int unit) 773 { 774 struct acpi_device *ad; 775 device_t child; 776 777 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 778 return (NULL); 779 780 resource_list_init(&ad->ad_rl); 781 782 child = device_add_child_ordered(bus, order, name, unit); 783 if (child != NULL) 784 device_set_ivars(child, ad); 785 else 786 free(ad, M_ACPIDEV); 787 return (child); 788 } 789 790 static int 791 acpi_print_child(device_t bus, device_t child) 792 { 793 struct acpi_device *adev = device_get_ivars(child); 794 struct resource_list *rl = &adev->ad_rl; 795 int retval = 0; 796 797 retval += bus_print_child_header(bus, child); 798 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#jx"); 799 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#jx"); 800 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%jd"); 801 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%jd"); 802 if (device_get_flags(child)) 803 retval += printf(" flags %#x", device_get_flags(child)); 804 retval += bus_print_child_domain(bus, child); 805 retval += bus_print_child_footer(bus, child); 806 807 return (retval); 808 } 809 810 /* 811 * If this device is an ACPI child but no one claimed it, attempt 812 * to power it off. We'll power it back up when a driver is added. 813 * 814 * XXX Disabled for now since many necessary devices (like fdc and 815 * ATA) don't claim the devices we created for them but still expect 816 * them to be powered up. 817 */ 818 static void 819 acpi_probe_nomatch(device_t bus, device_t child) 820 { 821 #ifdef ACPI_ENABLE_POWERDOWN_NODRIVER 822 acpi_set_powerstate(child, ACPI_STATE_D3); 823 #endif 824 } 825 826 /* 827 * If a new driver has a chance to probe a child, first power it up. 828 * 829 * XXX Disabled for now (see acpi_probe_nomatch for details). 830 */ 831 static void 832 acpi_driver_added(device_t dev, driver_t *driver) 833 { 834 device_t child, *devlist; 835 int i, numdevs; 836 837 DEVICE_IDENTIFY(driver, dev); 838 if (device_get_children(dev, &devlist, &numdevs)) 839 return; 840 for (i = 0; i < numdevs; i++) { 841 child = devlist[i]; 842 if (device_get_state(child) == DS_NOTPRESENT) { 843 #ifdef ACPI_ENABLE_POWERDOWN_NODRIVER 844 acpi_set_powerstate(child, ACPI_STATE_D0); 845 if (device_probe_and_attach(child) != 0) 846 acpi_set_powerstate(child, ACPI_STATE_D3); 847 #else 848 device_probe_and_attach(child); 849 #endif 850 } 851 } 852 free(devlist, M_TEMP); 853 } 854 855 /* Location hint for devctl(8) */ 856 static int 857 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf, 858 size_t buflen) 859 { 860 struct acpi_device *dinfo = device_get_ivars(child); 861 char buf2[32]; 862 int pxm; 863 864 if (dinfo->ad_handle) { 865 snprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle)); 866 if (ACPI_SUCCESS(acpi_GetInteger(dinfo->ad_handle, "_PXM", &pxm))) { 867 snprintf(buf2, 32, " _PXM=%d", pxm); 868 strlcat(buf, buf2, buflen); 869 } 870 } else { 871 snprintf(buf, buflen, "unknown"); 872 } 873 return (0); 874 } 875 876 /* PnP information for devctl(8) */ 877 static int 878 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 879 size_t buflen) 880 { 881 struct acpi_device *dinfo = device_get_ivars(child); 882 ACPI_DEVICE_INFO *adinfo; 883 884 if (ACPI_FAILURE(AcpiGetObjectInfo(dinfo->ad_handle, &adinfo))) { 885 snprintf(buf, buflen, "unknown"); 886 return (0); 887 } 888 889 snprintf(buf, buflen, "_HID=%s _UID=%lu", 890 (adinfo->Valid & ACPI_VALID_HID) ? 891 adinfo->HardwareId.String : "none", 892 (adinfo->Valid & ACPI_VALID_UID) ? 893 strtoul(adinfo->UniqueId.String, NULL, 10) : 0UL); 894 AcpiOsFree(adinfo); 895 896 return (0); 897 } 898 899 /* 900 * Handle per-device ivars 901 */ 902 static int 903 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 904 { 905 struct acpi_device *ad; 906 907 if ((ad = device_get_ivars(child)) == NULL) { 908 device_printf(child, "device has no ivars\n"); 909 return (ENOENT); 910 } 911 912 /* ACPI and ISA compatibility ivars */ 913 switch(index) { 914 case ACPI_IVAR_HANDLE: 915 *(ACPI_HANDLE *)result = ad->ad_handle; 916 break; 917 case ACPI_IVAR_PRIVATE: 918 *(void **)result = ad->ad_private; 919 break; 920 case ACPI_IVAR_FLAGS: 921 *(int *)result = ad->ad_flags; 922 break; 923 case ISA_IVAR_VENDORID: 924 case ISA_IVAR_SERIAL: 925 case ISA_IVAR_COMPATID: 926 *(int *)result = -1; 927 break; 928 case ISA_IVAR_LOGICALID: 929 *(int *)result = acpi_isa_get_logicalid(child); 930 break; 931 case PCI_IVAR_CLASS: 932 *(uint8_t*)result = (ad->ad_cls_class >> 16) & 0xff; 933 break; 934 case PCI_IVAR_SUBCLASS: 935 *(uint8_t*)result = (ad->ad_cls_class >> 8) & 0xff; 936 break; 937 case PCI_IVAR_PROGIF: 938 *(uint8_t*)result = (ad->ad_cls_class >> 0) & 0xff; 939 break; 940 default: 941 return (ENOENT); 942 } 943 944 return (0); 945 } 946 947 static int 948 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 949 { 950 struct acpi_device *ad; 951 952 if ((ad = device_get_ivars(child)) == NULL) { 953 device_printf(child, "device has no ivars\n"); 954 return (ENOENT); 955 } 956 957 switch(index) { 958 case ACPI_IVAR_HANDLE: 959 ad->ad_handle = (ACPI_HANDLE)value; 960 break; 961 case ACPI_IVAR_PRIVATE: 962 ad->ad_private = (void *)value; 963 break; 964 case ACPI_IVAR_FLAGS: 965 ad->ad_flags = (int)value; 966 break; 967 default: 968 panic("bad ivar write request (%d)", index); 969 return (ENOENT); 970 } 971 972 return (0); 973 } 974 975 /* 976 * Handle child resource allocation/removal 977 */ 978 static struct resource_list * 979 acpi_get_rlist(device_t dev, device_t child) 980 { 981 struct acpi_device *ad; 982 983 ad = device_get_ivars(child); 984 return (&ad->ad_rl); 985 } 986 987 static int 988 acpi_match_resource_hint(device_t dev, int type, long value) 989 { 990 struct acpi_device *ad = device_get_ivars(dev); 991 struct resource_list *rl = &ad->ad_rl; 992 struct resource_list_entry *rle; 993 994 STAILQ_FOREACH(rle, rl, link) { 995 if (rle->type != type) 996 continue; 997 if (rle->start <= value && rle->end >= value) 998 return (1); 999 } 1000 return (0); 1001 } 1002 1003 /* 1004 * Wire device unit numbers based on resource matches in hints. 1005 */ 1006 static void 1007 acpi_hint_device_unit(device_t acdev, device_t child, const char *name, 1008 int *unitp) 1009 { 1010 const char *s; 1011 long value; 1012 int line, matches, unit; 1013 1014 /* 1015 * Iterate over all the hints for the devices with the specified 1016 * name to see if one's resources are a subset of this device. 1017 */ 1018 line = 0; 1019 while (resource_find_dev(&line, name, &unit, "at", NULL) == 0) { 1020 /* Must have an "at" for acpi or isa. */ 1021 resource_string_value(name, unit, "at", &s); 1022 if (!(strcmp(s, "acpi0") == 0 || strcmp(s, "acpi") == 0 || 1023 strcmp(s, "isa0") == 0 || strcmp(s, "isa") == 0)) 1024 continue; 1025 1026 /* 1027 * Check for matching resources. We must have at least one match. 1028 * Since I/O and memory resources cannot be shared, if we get a 1029 * match on either of those, ignore any mismatches in IRQs or DRQs. 1030 * 1031 * XXX: We may want to revisit this to be more lenient and wire 1032 * as long as it gets one match. 1033 */ 1034 matches = 0; 1035 if (resource_long_value(name, unit, "port", &value) == 0) { 1036 /* 1037 * Floppy drive controllers are notorious for having a 1038 * wide variety of resources not all of which include the 1039 * first port that is specified by the hint (typically 1040 * 0x3f0) (see the comment above fdc_isa_alloc_resources() 1041 * in fdc_isa.c). However, they do all seem to include 1042 * port + 2 (e.g. 0x3f2) so for a floppy device, look for 1043 * 'value + 2' in the port resources instead of the hint 1044 * value. 1045 */ 1046 if (strcmp(name, "fdc") == 0) 1047 value += 2; 1048 if (acpi_match_resource_hint(child, SYS_RES_IOPORT, value)) 1049 matches++; 1050 else 1051 continue; 1052 } 1053 if (resource_long_value(name, unit, "maddr", &value) == 0) { 1054 if (acpi_match_resource_hint(child, SYS_RES_MEMORY, value)) 1055 matches++; 1056 else 1057 continue; 1058 } 1059 if (matches > 0) 1060 goto matched; 1061 if (resource_long_value(name, unit, "irq", &value) == 0) { 1062 if (acpi_match_resource_hint(child, SYS_RES_IRQ, value)) 1063 matches++; 1064 else 1065 continue; 1066 } 1067 if (resource_long_value(name, unit, "drq", &value) == 0) { 1068 if (acpi_match_resource_hint(child, SYS_RES_DRQ, value)) 1069 matches++; 1070 else 1071 continue; 1072 } 1073 1074 matched: 1075 if (matches > 0) { 1076 /* We have a winner! */ 1077 *unitp = unit; 1078 break; 1079 } 1080 } 1081 } 1082 1083 /* 1084 * Fetch the NUMA domain for a device by mapping the value returned by 1085 * _PXM to a NUMA domain. If the device does not have a _PXM method, 1086 * -2 is returned. If any other error occurs, -1 is returned. 1087 */ 1088 static int 1089 acpi_parse_pxm(device_t dev) 1090 { 1091 #ifdef NUMA 1092 ACPI_HANDLE handle; 1093 ACPI_STATUS status; 1094 int pxm; 1095 1096 handle = acpi_get_handle(dev); 1097 if (handle == NULL) 1098 return (-2); 1099 status = acpi_GetInteger(handle, "_PXM", &pxm); 1100 if (ACPI_SUCCESS(status)) 1101 return (acpi_map_pxm_to_vm_domainid(pxm)); 1102 if (status == AE_NOT_FOUND) 1103 return (-2); 1104 #endif 1105 return (-1); 1106 } 1107 1108 int 1109 acpi_get_cpus(device_t dev, device_t child, enum cpu_sets op, size_t setsize, 1110 cpuset_t *cpuset) 1111 { 1112 int d, error; 1113 1114 d = acpi_parse_pxm(child); 1115 if (d < 0) 1116 return (bus_generic_get_cpus(dev, child, op, setsize, cpuset)); 1117 1118 switch (op) { 1119 case LOCAL_CPUS: 1120 if (setsize != sizeof(cpuset_t)) 1121 return (EINVAL); 1122 *cpuset = cpuset_domain[d]; 1123 return (0); 1124 case INTR_CPUS: 1125 error = bus_generic_get_cpus(dev, child, op, setsize, cpuset); 1126 if (error != 0) 1127 return (error); 1128 if (setsize != sizeof(cpuset_t)) 1129 return (EINVAL); 1130 CPU_AND(cpuset, &cpuset_domain[d]); 1131 return (0); 1132 default: 1133 return (bus_generic_get_cpus(dev, child, op, setsize, cpuset)); 1134 } 1135 } 1136 1137 /* 1138 * Fetch the NUMA domain for the given device 'dev'. 1139 * 1140 * If a device has a _PXM method, map that to a NUMA domain. 1141 * Otherwise, pass the request up to the parent. 1142 * If there's no matching domain or the domain cannot be 1143 * determined, return ENOENT. 1144 */ 1145 int 1146 acpi_get_domain(device_t dev, device_t child, int *domain) 1147 { 1148 int d; 1149 1150 d = acpi_parse_pxm(child); 1151 if (d >= 0) { 1152 *domain = d; 1153 return (0); 1154 } 1155 if (d == -1) 1156 return (ENOENT); 1157 1158 /* No _PXM node; go up a level */ 1159 return (bus_generic_get_domain(dev, child, domain)); 1160 } 1161 1162 /* 1163 * Pre-allocate/manage all memory and IO resources. Since rman can't handle 1164 * duplicates, we merge any in the sysresource attach routine. 1165 */ 1166 static int 1167 acpi_sysres_alloc(device_t dev) 1168 { 1169 struct resource *res; 1170 struct resource_list *rl; 1171 struct resource_list_entry *rle; 1172 struct rman *rm; 1173 device_t *children; 1174 int child_count, i; 1175 1176 /* 1177 * Probe/attach any sysresource devices. This would be unnecessary if we 1178 * had multi-pass probe/attach. 1179 */ 1180 if (device_get_children(dev, &children, &child_count) != 0) 1181 return (ENXIO); 1182 for (i = 0; i < child_count; i++) { 1183 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 1184 device_probe_and_attach(children[i]); 1185 } 1186 free(children, M_TEMP); 1187 1188 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev); 1189 STAILQ_FOREACH(rle, rl, link) { 1190 if (rle->res != NULL) { 1191 device_printf(dev, "duplicate resource for %jx\n", rle->start); 1192 continue; 1193 } 1194 1195 /* Only memory and IO resources are valid here. */ 1196 switch (rle->type) { 1197 case SYS_RES_IOPORT: 1198 rm = &acpi_rman_io; 1199 break; 1200 case SYS_RES_MEMORY: 1201 rm = &acpi_rman_mem; 1202 break; 1203 default: 1204 continue; 1205 } 1206 1207 /* Pre-allocate resource and add to our rman pool. */ 1208 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type, 1209 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 0); 1210 if (res != NULL) { 1211 rman_manage_region(rm, rman_get_start(res), rman_get_end(res)); 1212 rle->res = res; 1213 } else if (bootverbose) 1214 device_printf(dev, "reservation of %jx, %jx (%d) failed\n", 1215 rle->start, rle->count, rle->type); 1216 } 1217 return (0); 1218 } 1219 1220 /* 1221 * Reserve declared resources for devices found during attach once system 1222 * resources have been allocated. 1223 */ 1224 static void 1225 acpi_reserve_resources(device_t dev) 1226 { 1227 struct resource_list_entry *rle; 1228 struct resource_list *rl; 1229 struct acpi_device *ad; 1230 struct acpi_softc *sc; 1231 device_t *children; 1232 int child_count, i; 1233 1234 sc = device_get_softc(dev); 1235 if (device_get_children(dev, &children, &child_count) != 0) 1236 return; 1237 for (i = 0; i < child_count; i++) { 1238 ad = device_get_ivars(children[i]); 1239 rl = &ad->ad_rl; 1240 1241 /* Don't reserve system resources. */ 1242 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 1243 continue; 1244 1245 STAILQ_FOREACH(rle, rl, link) { 1246 /* 1247 * Don't reserve IRQ resources. There are many sticky things 1248 * to get right otherwise (e.g. IRQs for psm, atkbd, and HPET 1249 * when using legacy routing). 1250 */ 1251 if (rle->type == SYS_RES_IRQ) 1252 continue; 1253 1254 /* 1255 * Don't reserve the resource if it is already allocated. 1256 * The acpi_ec(4) driver can allocate its resources early 1257 * if ECDT is present. 1258 */ 1259 if (rle->res != NULL) 1260 continue; 1261 1262 /* 1263 * Try to reserve the resource from our parent. If this 1264 * fails because the resource is a system resource, just 1265 * let it be. The resource range is already reserved so 1266 * that other devices will not use it. If the driver 1267 * needs to allocate the resource, then 1268 * acpi_alloc_resource() will sub-alloc from the system 1269 * resource. 1270 */ 1271 resource_list_reserve(rl, dev, children[i], rle->type, &rle->rid, 1272 rle->start, rle->end, rle->count, 0); 1273 } 1274 } 1275 free(children, M_TEMP); 1276 sc->acpi_resources_reserved = 1; 1277 } 1278 1279 static int 1280 acpi_set_resource(device_t dev, device_t child, int type, int rid, 1281 rman_res_t start, rman_res_t count) 1282 { 1283 struct acpi_softc *sc = device_get_softc(dev); 1284 struct acpi_device *ad = device_get_ivars(child); 1285 struct resource_list *rl = &ad->ad_rl; 1286 #if defined(__i386__) || defined(__amd64__) 1287 ACPI_DEVICE_INFO *devinfo; 1288 #endif 1289 rman_res_t end; 1290 1291 /* Ignore IRQ resources for PCI link devices. */ 1292 if (type == SYS_RES_IRQ && ACPI_ID_PROBE(dev, child, pcilink_ids) != NULL) 1293 return (0); 1294 1295 /* 1296 * Ignore most resources for PCI root bridges. Some BIOSes 1297 * incorrectly enumerate the memory ranges they decode as plain 1298 * memory resources instead of as ResourceProducer ranges. Other 1299 * BIOSes incorrectly list system resource entries for I/O ranges 1300 * under the PCI bridge. Do allow the one known-correct case on 1301 * x86 of a PCI bridge claiming the I/O ports used for PCI config 1302 * access. 1303 */ 1304 #if defined(__i386__) || defined(__amd64__) 1305 if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) { 1306 if (ACPI_SUCCESS(AcpiGetObjectInfo(ad->ad_handle, &devinfo))) { 1307 if ((devinfo->Flags & ACPI_PCI_ROOT_BRIDGE) != 0) { 1308 if (!(type == SYS_RES_IOPORT && start == CONF1_ADDR_PORT)) { 1309 AcpiOsFree(devinfo); 1310 return (0); 1311 } 1312 } 1313 AcpiOsFree(devinfo); 1314 } 1315 } 1316 #endif 1317 1318 /* If the resource is already allocated, fail. */ 1319 if (resource_list_busy(rl, type, rid)) 1320 return (EBUSY); 1321 1322 /* If the resource is already reserved, release it. */ 1323 if (resource_list_reserved(rl, type, rid)) 1324 resource_list_unreserve(rl, dev, child, type, rid); 1325 1326 /* Add the resource. */ 1327 end = (start + count - 1); 1328 resource_list_add(rl, type, rid, start, end, count); 1329 1330 /* Don't reserve resources until the system resources are allocated. */ 1331 if (!sc->acpi_resources_reserved) 1332 return (0); 1333 1334 /* Don't reserve system resources. */ 1335 if (ACPI_ID_PROBE(dev, child, sysres_ids) != NULL) 1336 return (0); 1337 1338 /* 1339 * Don't reserve IRQ resources. There are many sticky things to 1340 * get right otherwise (e.g. IRQs for psm, atkbd, and HPET when 1341 * using legacy routing). 1342 */ 1343 if (type == SYS_RES_IRQ) 1344 return (0); 1345 1346 /* 1347 * Reserve the resource. 1348 * 1349 * XXX: Ignores failure for now. Failure here is probably a 1350 * BIOS/firmware bug? 1351 */ 1352 resource_list_reserve(rl, dev, child, type, &rid, start, end, count, 0); 1353 return (0); 1354 } 1355 1356 static struct resource * 1357 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 1358 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags) 1359 { 1360 #ifndef INTRNG 1361 ACPI_RESOURCE ares; 1362 #endif 1363 struct acpi_device *ad; 1364 struct resource_list_entry *rle; 1365 struct resource_list *rl; 1366 struct resource *res; 1367 int isdefault = RMAN_IS_DEFAULT_RANGE(start, end); 1368 1369 /* 1370 * First attempt at allocating the resource. For direct children, 1371 * use resource_list_alloc() to handle reserved resources. For 1372 * other devices, pass the request up to our parent. 1373 */ 1374 if (bus == device_get_parent(child)) { 1375 ad = device_get_ivars(child); 1376 rl = &ad->ad_rl; 1377 1378 /* 1379 * Simulate the behavior of the ISA bus for direct children 1380 * devices. That is, if a non-default range is specified for 1381 * a resource that doesn't exist, use bus_set_resource() to 1382 * add the resource before allocating it. Note that these 1383 * resources will not be reserved. 1384 */ 1385 if (!isdefault && resource_list_find(rl, type, *rid) == NULL) 1386 resource_list_add(rl, type, *rid, start, end, count); 1387 res = resource_list_alloc(rl, bus, child, type, rid, start, end, count, 1388 flags); 1389 #ifndef INTRNG 1390 if (res != NULL && type == SYS_RES_IRQ) { 1391 /* 1392 * Since bus_config_intr() takes immediate effect, we cannot 1393 * configure the interrupt associated with a device when we 1394 * parse the resources but have to defer it until a driver 1395 * actually allocates the interrupt via bus_alloc_resource(). 1396 * 1397 * XXX: Should we handle the lookup failing? 1398 */ 1399 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares))) 1400 acpi_config_intr(child, &ares); 1401 } 1402 #endif 1403 1404 /* 1405 * If this is an allocation of the "default" range for a given 1406 * RID, fetch the exact bounds for this resource from the 1407 * resource list entry to try to allocate the range from the 1408 * system resource regions. 1409 */ 1410 if (res == NULL && isdefault) { 1411 rle = resource_list_find(rl, type, *rid); 1412 if (rle != NULL) { 1413 start = rle->start; 1414 end = rle->end; 1415 count = rle->count; 1416 } 1417 } 1418 } else 1419 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid, 1420 start, end, count, flags); 1421 1422 /* 1423 * If the first attempt failed and this is an allocation of a 1424 * specific range, try to satisfy the request via a suballocation 1425 * from our system resource regions. 1426 */ 1427 if (res == NULL && start + count - 1 == end) 1428 res = acpi_alloc_sysres(child, type, rid, start, end, count, flags); 1429 return (res); 1430 } 1431 1432 /* 1433 * Attempt to allocate a specific resource range from the system 1434 * resource ranges. Note that we only handle memory and I/O port 1435 * system resources. 1436 */ 1437 struct resource * 1438 acpi_alloc_sysres(device_t child, int type, int *rid, rman_res_t start, 1439 rman_res_t end, rman_res_t count, u_int flags) 1440 { 1441 struct rman *rm; 1442 struct resource *res; 1443 1444 switch (type) { 1445 case SYS_RES_IOPORT: 1446 rm = &acpi_rman_io; 1447 break; 1448 case SYS_RES_MEMORY: 1449 rm = &acpi_rman_mem; 1450 break; 1451 default: 1452 return (NULL); 1453 } 1454 1455 KASSERT(start + count - 1 == end, ("wildcard resource range")); 1456 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE, 1457 child); 1458 if (res == NULL) 1459 return (NULL); 1460 1461 rman_set_rid(res, *rid); 1462 1463 /* If requested, activate the resource using the parent's method. */ 1464 if (flags & RF_ACTIVE) 1465 if (bus_activate_resource(child, type, *rid, res) != 0) { 1466 rman_release_resource(res); 1467 return (NULL); 1468 } 1469 1470 return (res); 1471 } 1472 1473 static int 1474 acpi_is_resource_managed(int type, struct resource *r) 1475 { 1476 1477 /* We only handle memory and IO resources through rman. */ 1478 switch (type) { 1479 case SYS_RES_IOPORT: 1480 return (rman_is_region_manager(r, &acpi_rman_io)); 1481 case SYS_RES_MEMORY: 1482 return (rman_is_region_manager(r, &acpi_rman_mem)); 1483 } 1484 return (0); 1485 } 1486 1487 static int 1488 acpi_adjust_resource(device_t bus, device_t child, int type, struct resource *r, 1489 rman_res_t start, rman_res_t end) 1490 { 1491 1492 if (acpi_is_resource_managed(type, r)) 1493 return (rman_adjust_resource(r, start, end)); 1494 return (bus_generic_adjust_resource(bus, child, type, r, start, end)); 1495 } 1496 1497 static int 1498 acpi_release_resource(device_t bus, device_t child, int type, int rid, 1499 struct resource *r) 1500 { 1501 int ret; 1502 1503 /* 1504 * If this resource belongs to one of our internal managers, 1505 * deactivate it and release it to the local pool. 1506 */ 1507 if (acpi_is_resource_managed(type, r)) { 1508 if (rman_get_flags(r) & RF_ACTIVE) { 1509 ret = bus_deactivate_resource(child, type, rid, r); 1510 if (ret != 0) 1511 return (ret); 1512 } 1513 return (rman_release_resource(r)); 1514 } 1515 1516 return (bus_generic_rl_release_resource(bus, child, type, rid, r)); 1517 } 1518 1519 static void 1520 acpi_delete_resource(device_t bus, device_t child, int type, int rid) 1521 { 1522 struct resource_list *rl; 1523 1524 rl = acpi_get_rlist(bus, child); 1525 if (resource_list_busy(rl, type, rid)) { 1526 device_printf(bus, "delete_resource: Resource still owned by child" 1527 " (type=%d, rid=%d)\n", type, rid); 1528 return; 1529 } 1530 resource_list_unreserve(rl, bus, child, type, rid); 1531 resource_list_delete(rl, type, rid); 1532 } 1533 1534 /* Allocate an IO port or memory resource, given its GAS. */ 1535 int 1536 acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas, 1537 struct resource **res, u_int flags) 1538 { 1539 int error, res_type; 1540 1541 error = ENOMEM; 1542 if (type == NULL || rid == NULL || gas == NULL || res == NULL) 1543 return (EINVAL); 1544 1545 /* We only support memory and IO spaces. */ 1546 switch (gas->SpaceId) { 1547 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1548 res_type = SYS_RES_MEMORY; 1549 break; 1550 case ACPI_ADR_SPACE_SYSTEM_IO: 1551 res_type = SYS_RES_IOPORT; 1552 break; 1553 default: 1554 return (EOPNOTSUPP); 1555 } 1556 1557 /* 1558 * If the register width is less than 8, assume the BIOS author means 1559 * it is a bit field and just allocate a byte. 1560 */ 1561 if (gas->BitWidth && gas->BitWidth < 8) 1562 gas->BitWidth = 8; 1563 1564 /* Validate the address after we're sure we support the space. */ 1565 if (gas->Address == 0 || gas->BitWidth == 0) 1566 return (EINVAL); 1567 1568 bus_set_resource(dev, res_type, *rid, gas->Address, 1569 gas->BitWidth / 8); 1570 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags); 1571 if (*res != NULL) { 1572 *type = res_type; 1573 error = 0; 1574 } else 1575 bus_delete_resource(dev, res_type, *rid); 1576 1577 return (error); 1578 } 1579 1580 /* Probe _HID and _CID for compatible ISA PNP ids. */ 1581 static uint32_t 1582 acpi_isa_get_logicalid(device_t dev) 1583 { 1584 ACPI_DEVICE_INFO *devinfo; 1585 ACPI_HANDLE h; 1586 uint32_t pnpid; 1587 1588 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1589 1590 /* Fetch and validate the HID. */ 1591 if ((h = acpi_get_handle(dev)) == NULL || 1592 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1593 return_VALUE (0); 1594 1595 pnpid = (devinfo->Valid & ACPI_VALID_HID) != 0 && 1596 devinfo->HardwareId.Length >= ACPI_EISAID_STRING_SIZE ? 1597 PNP_EISAID(devinfo->HardwareId.String) : 0; 1598 AcpiOsFree(devinfo); 1599 1600 return_VALUE (pnpid); 1601 } 1602 1603 static int 1604 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 1605 { 1606 ACPI_DEVICE_INFO *devinfo; 1607 ACPI_PNP_DEVICE_ID *ids; 1608 ACPI_HANDLE h; 1609 uint32_t *pnpid; 1610 int i, valid; 1611 1612 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1613 1614 pnpid = cids; 1615 1616 /* Fetch and validate the CID */ 1617 if ((h = acpi_get_handle(dev)) == NULL || 1618 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1619 return_VALUE (0); 1620 1621 if ((devinfo->Valid & ACPI_VALID_CID) == 0) { 1622 AcpiOsFree(devinfo); 1623 return_VALUE (0); 1624 } 1625 1626 if (devinfo->CompatibleIdList.Count < count) 1627 count = devinfo->CompatibleIdList.Count; 1628 ids = devinfo->CompatibleIdList.Ids; 1629 for (i = 0, valid = 0; i < count; i++) 1630 if (ids[i].Length >= ACPI_EISAID_STRING_SIZE && 1631 strncmp(ids[i].String, "PNP", 3) == 0) { 1632 *pnpid++ = PNP_EISAID(ids[i].String); 1633 valid++; 1634 } 1635 AcpiOsFree(devinfo); 1636 1637 return_VALUE (valid); 1638 } 1639 1640 static char * 1641 acpi_device_id_probe(device_t bus, device_t dev, char **ids) 1642 { 1643 ACPI_HANDLE h; 1644 ACPI_OBJECT_TYPE t; 1645 int i; 1646 1647 h = acpi_get_handle(dev); 1648 if (ids == NULL || h == NULL) 1649 return (NULL); 1650 t = acpi_get_type(dev); 1651 if (t != ACPI_TYPE_DEVICE && t != ACPI_TYPE_PROCESSOR) 1652 return (NULL); 1653 1654 /* Try to match one of the array of IDs with a HID or CID. */ 1655 for (i = 0; ids[i] != NULL; i++) { 1656 if (acpi_MatchHid(h, ids[i])) 1657 return (ids[i]); 1658 } 1659 return (NULL); 1660 } 1661 1662 static ACPI_STATUS 1663 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname, 1664 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret) 1665 { 1666 ACPI_HANDLE h; 1667 1668 if (dev == NULL) 1669 h = ACPI_ROOT_OBJECT; 1670 else if ((h = acpi_get_handle(dev)) == NULL) 1671 return (AE_BAD_PARAMETER); 1672 return (AcpiEvaluateObject(h, pathname, parameters, ret)); 1673 } 1674 1675 int 1676 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate) 1677 { 1678 struct acpi_softc *sc; 1679 ACPI_HANDLE handle; 1680 ACPI_STATUS status; 1681 char sxd[8]; 1682 1683 handle = acpi_get_handle(dev); 1684 1685 /* 1686 * XXX If we find these devices, don't try to power them down. 1687 * The serial and IRDA ports on my T23 hang the system when 1688 * set to D3 and it appears that such legacy devices may 1689 * need special handling in their drivers. 1690 */ 1691 if (dstate == NULL || handle == NULL || 1692 acpi_MatchHid(handle, "PNP0500") || 1693 acpi_MatchHid(handle, "PNP0501") || 1694 acpi_MatchHid(handle, "PNP0502") || 1695 acpi_MatchHid(handle, "PNP0510") || 1696 acpi_MatchHid(handle, "PNP0511")) 1697 return (ENXIO); 1698 1699 /* 1700 * Override next state with the value from _SxD, if present. 1701 * Note illegal _S0D is evaluated because some systems expect this. 1702 */ 1703 sc = device_get_softc(bus); 1704 snprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate); 1705 status = acpi_GetInteger(handle, sxd, dstate); 1706 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { 1707 device_printf(dev, "failed to get %s on %s: %s\n", sxd, 1708 acpi_name(handle), AcpiFormatException(status)); 1709 return (ENXIO); 1710 } 1711 1712 return (0); 1713 } 1714 1715 /* Callback arg for our implementation of walking the namespace. */ 1716 struct acpi_device_scan_ctx { 1717 acpi_scan_cb_t user_fn; 1718 void *arg; 1719 ACPI_HANDLE parent; 1720 }; 1721 1722 static ACPI_STATUS 1723 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval) 1724 { 1725 struct acpi_device_scan_ctx *ctx; 1726 device_t dev, old_dev; 1727 ACPI_STATUS status; 1728 ACPI_OBJECT_TYPE type; 1729 1730 /* 1731 * Skip this device if we think we'll have trouble with it or it is 1732 * the parent where the scan began. 1733 */ 1734 ctx = (struct acpi_device_scan_ctx *)arg; 1735 if (acpi_avoid(h) || h == ctx->parent) 1736 return (AE_OK); 1737 1738 /* If this is not a valid device type (e.g., a method), skip it. */ 1739 if (ACPI_FAILURE(AcpiGetType(h, &type))) 1740 return (AE_OK); 1741 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR && 1742 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER) 1743 return (AE_OK); 1744 1745 /* 1746 * Call the user function with the current device. If it is unchanged 1747 * afterwards, return. Otherwise, we update the handle to the new dev. 1748 */ 1749 old_dev = acpi_get_device(h); 1750 dev = old_dev; 1751 status = ctx->user_fn(h, &dev, level, ctx->arg); 1752 if (ACPI_FAILURE(status) || old_dev == dev) 1753 return (status); 1754 1755 /* Remove the old child and its connection to the handle. */ 1756 if (old_dev != NULL) { 1757 device_delete_child(device_get_parent(old_dev), old_dev); 1758 AcpiDetachData(h, acpi_fake_objhandler); 1759 } 1760 1761 /* Recreate the handle association if the user created a device. */ 1762 if (dev != NULL) 1763 AcpiAttachData(h, acpi_fake_objhandler, dev); 1764 1765 return (AE_OK); 1766 } 1767 1768 static ACPI_STATUS 1769 acpi_device_scan_children(device_t bus, device_t dev, int max_depth, 1770 acpi_scan_cb_t user_fn, void *arg) 1771 { 1772 ACPI_HANDLE h; 1773 struct acpi_device_scan_ctx ctx; 1774 1775 if (acpi_disabled("children")) 1776 return (AE_OK); 1777 1778 if (dev == NULL) 1779 h = ACPI_ROOT_OBJECT; 1780 else if ((h = acpi_get_handle(dev)) == NULL) 1781 return (AE_BAD_PARAMETER); 1782 ctx.user_fn = user_fn; 1783 ctx.arg = arg; 1784 ctx.parent = h; 1785 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth, 1786 acpi_device_scan_cb, NULL, &ctx, NULL)); 1787 } 1788 1789 /* 1790 * Even though ACPI devices are not PCI, we use the PCI approach for setting 1791 * device power states since it's close enough to ACPI. 1792 */ 1793 static int 1794 acpi_set_powerstate(device_t child, int state) 1795 { 1796 ACPI_HANDLE h; 1797 ACPI_STATUS status; 1798 1799 h = acpi_get_handle(child); 1800 if (state < ACPI_STATE_D0 || state > ACPI_D_STATES_MAX) 1801 return (EINVAL); 1802 if (h == NULL) 1803 return (0); 1804 1805 /* Ignore errors if the power methods aren't present. */ 1806 status = acpi_pwr_switch_consumer(h, state); 1807 if (ACPI_SUCCESS(status)) { 1808 if (bootverbose) 1809 device_printf(child, "set ACPI power state D%d on %s\n", 1810 state, acpi_name(h)); 1811 } else if (status != AE_NOT_FOUND) 1812 device_printf(child, 1813 "failed to set ACPI power state D%d on %s: %s\n", state, 1814 acpi_name(h), AcpiFormatException(status)); 1815 1816 return (0); 1817 } 1818 1819 static int 1820 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 1821 { 1822 int result, cid_count, i; 1823 uint32_t lid, cids[8]; 1824 1825 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1826 1827 /* 1828 * ISA-style drivers attached to ACPI may persist and 1829 * probe manually if we return ENOENT. We never want 1830 * that to happen, so don't ever return it. 1831 */ 1832 result = ENXIO; 1833 1834 /* Scan the supplied IDs for a match */ 1835 lid = acpi_isa_get_logicalid(child); 1836 cid_count = acpi_isa_get_compatid(child, cids, 8); 1837 while (ids && ids->ip_id) { 1838 if (lid == ids->ip_id) { 1839 result = 0; 1840 goto out; 1841 } 1842 for (i = 0; i < cid_count; i++) { 1843 if (cids[i] == ids->ip_id) { 1844 result = 0; 1845 goto out; 1846 } 1847 } 1848 ids++; 1849 } 1850 1851 out: 1852 if (result == 0 && ids->ip_desc) 1853 device_set_desc(child, ids->ip_desc); 1854 1855 return_VALUE (result); 1856 } 1857 1858 #if defined(__i386__) || defined(__amd64__) 1859 /* 1860 * Look for a MCFG table. If it is present, use the settings for 1861 * domain (segment) 0 to setup PCI config space access via the memory 1862 * map. 1863 */ 1864 static void 1865 acpi_enable_pcie(void) 1866 { 1867 ACPI_TABLE_HEADER *hdr; 1868 ACPI_MCFG_ALLOCATION *alloc, *end; 1869 ACPI_STATUS status; 1870 1871 status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr); 1872 if (ACPI_FAILURE(status)) 1873 return; 1874 1875 end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length); 1876 alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1); 1877 while (alloc < end) { 1878 if (alloc->PciSegment == 0) { 1879 pcie_cfgregopen(alloc->Address, alloc->StartBusNumber, 1880 alloc->EndBusNumber); 1881 return; 1882 } 1883 alloc++; 1884 } 1885 } 1886 #endif 1887 1888 /* 1889 * Scan all of the ACPI namespace and attach child devices. 1890 * 1891 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and 1892 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec. 1893 * However, in violation of the spec, some systems place their PCI link 1894 * devices in \, so we have to walk the whole namespace. We check the 1895 * type of namespace nodes, so this should be ok. 1896 */ 1897 static void 1898 acpi_probe_children(device_t bus) 1899 { 1900 1901 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1902 1903 /* 1904 * Scan the namespace and insert placeholders for all the devices that 1905 * we find. We also probe/attach any early devices. 1906 * 1907 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1908 * we want to create nodes for all devices, not just those that are 1909 * currently present. (This assumes that we don't want to create/remove 1910 * devices as they appear, which might be smarter.) 1911 */ 1912 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1913 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, acpi_probe_child, 1914 NULL, bus, NULL); 1915 1916 /* Pre-allocate resources for our rman from any sysresource devices. */ 1917 acpi_sysres_alloc(bus); 1918 1919 /* Reserve resources already allocated to children. */ 1920 acpi_reserve_resources(bus); 1921 1922 /* Create any static children by calling device identify methods. */ 1923 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1924 bus_generic_probe(bus); 1925 1926 /* Probe/attach all children, created statically and from the namespace. */ 1927 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "acpi bus_generic_attach\n")); 1928 bus_generic_attach(bus); 1929 1930 /* Attach wake sysctls. */ 1931 acpi_wake_sysctl_walk(bus); 1932 1933 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1934 return_VOID; 1935 } 1936 1937 /* 1938 * Determine the probe order for a given device. 1939 */ 1940 static void 1941 acpi_probe_order(ACPI_HANDLE handle, int *order) 1942 { 1943 ACPI_OBJECT_TYPE type; 1944 1945 /* 1946 * 0. CPUs 1947 * 1. I/O port and memory system resource holders 1948 * 2. Clocks and timers (to handle early accesses) 1949 * 3. Embedded controllers (to handle early accesses) 1950 * 4. PCI Link Devices 1951 */ 1952 AcpiGetType(handle, &type); 1953 if (type == ACPI_TYPE_PROCESSOR) 1954 *order = 0; 1955 else if (acpi_MatchHid(handle, "PNP0C01") || 1956 acpi_MatchHid(handle, "PNP0C02")) 1957 *order = 1; 1958 else if (acpi_MatchHid(handle, "PNP0100") || 1959 acpi_MatchHid(handle, "PNP0103") || 1960 acpi_MatchHid(handle, "PNP0B00")) 1961 *order = 2; 1962 else if (acpi_MatchHid(handle, "PNP0C09")) 1963 *order = 3; 1964 else if (acpi_MatchHid(handle, "PNP0C0F")) 1965 *order = 4; 1966 } 1967 1968 /* 1969 * Evaluate a child device and determine whether we might attach a device to 1970 * it. 1971 */ 1972 static ACPI_STATUS 1973 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1974 { 1975 ACPI_DEVICE_INFO *devinfo; 1976 struct acpi_device *ad; 1977 struct acpi_prw_data prw; 1978 ACPI_OBJECT_TYPE type; 1979 ACPI_HANDLE h; 1980 device_t bus, child; 1981 char *handle_str; 1982 int order; 1983 1984 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1985 1986 if (acpi_disabled("children")) 1987 return_ACPI_STATUS (AE_OK); 1988 1989 /* Skip this device if we think we'll have trouble with it. */ 1990 if (acpi_avoid(handle)) 1991 return_ACPI_STATUS (AE_OK); 1992 1993 bus = (device_t)context; 1994 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1995 handle_str = acpi_name(handle); 1996 switch (type) { 1997 case ACPI_TYPE_DEVICE: 1998 /* 1999 * Since we scan from \, be sure to skip system scope objects. 2000 * \_SB_ and \_TZ_ are defined in ACPICA as devices to work around 2001 * BIOS bugs. For example, \_SB_ is to allow \_SB_._INI to be run 2002 * during the initialization and \_TZ_ is to support Notify() on it. 2003 */ 2004 if (strcmp(handle_str, "\\_SB_") == 0 || 2005 strcmp(handle_str, "\\_TZ_") == 0) 2006 break; 2007 if (acpi_parse_prw(handle, &prw) == 0) 2008 AcpiSetupGpeForWake(handle, prw.gpe_handle, prw.gpe_bit); 2009 2010 /* 2011 * Ignore devices that do not have a _HID or _CID. They should 2012 * be discovered by other buses (e.g. the PCI bus driver). 2013 */ 2014 if (!acpi_has_hid(handle)) 2015 break; 2016 /* FALLTHROUGH */ 2017 case ACPI_TYPE_PROCESSOR: 2018 case ACPI_TYPE_THERMAL: 2019 case ACPI_TYPE_POWER: 2020 /* 2021 * Create a placeholder device for this node. Sort the 2022 * placeholder so that the probe/attach passes will run 2023 * breadth-first. Orders less than ACPI_DEV_BASE_ORDER 2024 * are reserved for special objects (i.e., system 2025 * resources). 2026 */ 2027 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str)); 2028 order = level * 10 + ACPI_DEV_BASE_ORDER; 2029 acpi_probe_order(handle, &order); 2030 child = BUS_ADD_CHILD(bus, order, NULL, -1); 2031 if (child == NULL) 2032 break; 2033 2034 /* Associate the handle with the device_t and vice versa. */ 2035 acpi_set_handle(child, handle); 2036 AcpiAttachData(handle, acpi_fake_objhandler, child); 2037 2038 /* 2039 * Check that the device is present. If it's not present, 2040 * leave it disabled (so that we have a device_t attached to 2041 * the handle, but we don't probe it). 2042 * 2043 * XXX PCI link devices sometimes report "present" but not 2044 * "functional" (i.e. if disabled). Go ahead and probe them 2045 * anyway since we may enable them later. 2046 */ 2047 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 2048 /* Never disable PCI link devices. */ 2049 if (acpi_MatchHid(handle, "PNP0C0F")) 2050 break; 2051 /* 2052 * Docking stations should remain enabled since the system 2053 * may be undocked at boot. 2054 */ 2055 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h))) 2056 break; 2057 2058 device_disable(child); 2059 break; 2060 } 2061 2062 /* 2063 * Get the device's resource settings and attach them. 2064 * Note that if the device has _PRS but no _CRS, we need 2065 * to decide when it's appropriate to try to configure the 2066 * device. Ignore the return value here; it's OK for the 2067 * device not to have any resources. 2068 */ 2069 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 2070 2071 ad = device_get_ivars(child); 2072 ad->ad_cls_class = 0xffffff; 2073 if (ACPI_SUCCESS(AcpiGetObjectInfo(handle, &devinfo))) { 2074 if ((devinfo->Valid & ACPI_VALID_CLS) != 0 && 2075 devinfo->ClassCode.Length >= ACPI_PCICLS_STRING_SIZE) { 2076 ad->ad_cls_class = strtoul(devinfo->ClassCode.String, 2077 NULL, 16); 2078 } 2079 AcpiOsFree(devinfo); 2080 } 2081 break; 2082 } 2083 } 2084 2085 return_ACPI_STATUS (AE_OK); 2086 } 2087 2088 /* 2089 * AcpiAttachData() requires an object handler but never uses it. This is a 2090 * placeholder object handler so we can store a device_t in an ACPI_HANDLE. 2091 */ 2092 void 2093 acpi_fake_objhandler(ACPI_HANDLE h, void *data) 2094 { 2095 } 2096 2097 static void 2098 acpi_shutdown_final(void *arg, int howto) 2099 { 2100 struct acpi_softc *sc = (struct acpi_softc *)arg; 2101 register_t intr; 2102 ACPI_STATUS status; 2103 2104 /* 2105 * XXX Shutdown code should only run on the BSP (cpuid 0). 2106 * Some chipsets do not power off the system correctly if called from 2107 * an AP. 2108 */ 2109 if ((howto & RB_POWEROFF) != 0) { 2110 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 2111 if (ACPI_FAILURE(status)) { 2112 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2113 AcpiFormatException(status)); 2114 return; 2115 } 2116 device_printf(sc->acpi_dev, "Powering system off\n"); 2117 intr = intr_disable(); 2118 status = AcpiEnterSleepState(ACPI_STATE_S5); 2119 if (ACPI_FAILURE(status)) { 2120 intr_restore(intr); 2121 device_printf(sc->acpi_dev, "power-off failed - %s\n", 2122 AcpiFormatException(status)); 2123 } else { 2124 DELAY(1000000); 2125 intr_restore(intr); 2126 device_printf(sc->acpi_dev, "power-off failed - timeout\n"); 2127 } 2128 } else if ((howto & RB_HALT) == 0 && sc->acpi_handle_reboot) { 2129 /* Reboot using the reset register. */ 2130 status = AcpiReset(); 2131 if (ACPI_SUCCESS(status)) { 2132 DELAY(1000000); 2133 device_printf(sc->acpi_dev, "reset failed - timeout\n"); 2134 } else if (status != AE_NOT_EXIST) 2135 device_printf(sc->acpi_dev, "reset failed - %s\n", 2136 AcpiFormatException(status)); 2137 } else if (sc->acpi_do_disable && panicstr == NULL) { 2138 /* 2139 * Only disable ACPI if the user requested. On some systems, writing 2140 * the disable value to SMI_CMD hangs the system. 2141 */ 2142 device_printf(sc->acpi_dev, "Shutting down\n"); 2143 AcpiTerminate(); 2144 } 2145 } 2146 2147 static void 2148 acpi_enable_fixed_events(struct acpi_softc *sc) 2149 { 2150 static int first_time = 1; 2151 2152 /* Enable and clear fixed events and install handlers. */ 2153 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) { 2154 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 2155 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 2156 acpi_event_power_button_sleep, sc); 2157 if (first_time) 2158 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 2159 } 2160 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) { 2161 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 2162 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 2163 acpi_event_sleep_button_sleep, sc); 2164 if (first_time) 2165 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 2166 } 2167 2168 first_time = 0; 2169 } 2170 2171 /* 2172 * Returns true if the device is actually present and should 2173 * be attached to. This requires the present, enabled, UI-visible 2174 * and diagnostics-passed bits to be set. 2175 */ 2176 BOOLEAN 2177 acpi_DeviceIsPresent(device_t dev) 2178 { 2179 ACPI_DEVICE_INFO *devinfo; 2180 ACPI_HANDLE h; 2181 BOOLEAN present; 2182 2183 if ((h = acpi_get_handle(dev)) == NULL || 2184 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2185 return (FALSE); 2186 2187 /* If no _STA method, must be present */ 2188 present = (devinfo->Valid & ACPI_VALID_STA) == 0 || 2189 ACPI_DEVICE_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE; 2190 2191 AcpiOsFree(devinfo); 2192 return (present); 2193 } 2194 2195 /* 2196 * Returns true if the battery is actually present and inserted. 2197 */ 2198 BOOLEAN 2199 acpi_BatteryIsPresent(device_t dev) 2200 { 2201 ACPI_DEVICE_INFO *devinfo; 2202 ACPI_HANDLE h; 2203 BOOLEAN present; 2204 2205 if ((h = acpi_get_handle(dev)) == NULL || 2206 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2207 return (FALSE); 2208 2209 /* If no _STA method, must be present */ 2210 present = (devinfo->Valid & ACPI_VALID_STA) == 0 || 2211 ACPI_BATTERY_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE; 2212 2213 AcpiOsFree(devinfo); 2214 return (present); 2215 } 2216 2217 /* 2218 * Returns true if a device has at least one valid device ID. 2219 */ 2220 static BOOLEAN 2221 acpi_has_hid(ACPI_HANDLE h) 2222 { 2223 ACPI_DEVICE_INFO *devinfo; 2224 BOOLEAN ret; 2225 2226 if (h == NULL || 2227 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2228 return (FALSE); 2229 2230 ret = FALSE; 2231 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 2232 ret = TRUE; 2233 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) 2234 if (devinfo->CompatibleIdList.Count > 0) 2235 ret = TRUE; 2236 2237 AcpiOsFree(devinfo); 2238 return (ret); 2239 } 2240 2241 /* 2242 * Match a HID string against a handle 2243 */ 2244 BOOLEAN 2245 acpi_MatchHid(ACPI_HANDLE h, const char *hid) 2246 { 2247 ACPI_DEVICE_INFO *devinfo; 2248 BOOLEAN ret; 2249 int i; 2250 2251 if (hid == NULL || h == NULL || 2252 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2253 return (FALSE); 2254 2255 ret = FALSE; 2256 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 2257 strcmp(hid, devinfo->HardwareId.String) == 0) 2258 ret = TRUE; 2259 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) 2260 for (i = 0; i < devinfo->CompatibleIdList.Count; i++) { 2261 if (strcmp(hid, devinfo->CompatibleIdList.Ids[i].String) == 0) { 2262 ret = TRUE; 2263 break; 2264 } 2265 } 2266 2267 AcpiOsFree(devinfo); 2268 return (ret); 2269 } 2270 2271 /* 2272 * Return the handle of a named object within our scope, ie. that of (parent) 2273 * or one if its parents. 2274 */ 2275 ACPI_STATUS 2276 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 2277 { 2278 ACPI_HANDLE r; 2279 ACPI_STATUS status; 2280 2281 /* Walk back up the tree to the root */ 2282 for (;;) { 2283 status = AcpiGetHandle(parent, path, &r); 2284 if (ACPI_SUCCESS(status)) { 2285 *result = r; 2286 return (AE_OK); 2287 } 2288 /* XXX Return error here? */ 2289 if (status != AE_NOT_FOUND) 2290 return (AE_OK); 2291 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 2292 return (AE_NOT_FOUND); 2293 parent = r; 2294 } 2295 } 2296 2297 /* 2298 * Allocate a buffer with a preset data size. 2299 */ 2300 ACPI_BUFFER * 2301 acpi_AllocBuffer(int size) 2302 { 2303 ACPI_BUFFER *buf; 2304 2305 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 2306 return (NULL); 2307 buf->Length = size; 2308 buf->Pointer = (void *)(buf + 1); 2309 return (buf); 2310 } 2311 2312 ACPI_STATUS 2313 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 2314 { 2315 ACPI_OBJECT arg1; 2316 ACPI_OBJECT_LIST args; 2317 2318 arg1.Type = ACPI_TYPE_INTEGER; 2319 arg1.Integer.Value = number; 2320 args.Count = 1; 2321 args.Pointer = &arg1; 2322 2323 return (AcpiEvaluateObject(handle, path, &args, NULL)); 2324 } 2325 2326 /* 2327 * Evaluate a path that should return an integer. 2328 */ 2329 ACPI_STATUS 2330 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 2331 { 2332 ACPI_STATUS status; 2333 ACPI_BUFFER buf; 2334 ACPI_OBJECT param; 2335 2336 if (handle == NULL) 2337 handle = ACPI_ROOT_OBJECT; 2338 2339 /* 2340 * Assume that what we've been pointed at is an Integer object, or 2341 * a method that will return an Integer. 2342 */ 2343 buf.Pointer = ¶m; 2344 buf.Length = sizeof(param); 2345 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2346 if (ACPI_SUCCESS(status)) { 2347 if (param.Type == ACPI_TYPE_INTEGER) 2348 *number = param.Integer.Value; 2349 else 2350 status = AE_TYPE; 2351 } 2352 2353 /* 2354 * In some applications, a method that's expected to return an Integer 2355 * may instead return a Buffer (probably to simplify some internal 2356 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 2357 * convert it into an Integer as best we can. 2358 * 2359 * This is a hack. 2360 */ 2361 if (status == AE_BUFFER_OVERFLOW) { 2362 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 2363 status = AE_NO_MEMORY; 2364 } else { 2365 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2366 if (ACPI_SUCCESS(status)) 2367 status = acpi_ConvertBufferToInteger(&buf, number); 2368 AcpiOsFree(buf.Pointer); 2369 } 2370 } 2371 return (status); 2372 } 2373 2374 ACPI_STATUS 2375 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 2376 { 2377 ACPI_OBJECT *p; 2378 UINT8 *val; 2379 int i; 2380 2381 p = (ACPI_OBJECT *)bufp->Pointer; 2382 if (p->Type == ACPI_TYPE_INTEGER) { 2383 *number = p->Integer.Value; 2384 return (AE_OK); 2385 } 2386 if (p->Type != ACPI_TYPE_BUFFER) 2387 return (AE_TYPE); 2388 if (p->Buffer.Length > sizeof(int)) 2389 return (AE_BAD_DATA); 2390 2391 *number = 0; 2392 val = p->Buffer.Pointer; 2393 for (i = 0; i < p->Buffer.Length; i++) 2394 *number += val[i] << (i * 8); 2395 return (AE_OK); 2396 } 2397 2398 /* 2399 * Iterate over the elements of an a package object, calling the supplied 2400 * function for each element. 2401 * 2402 * XXX possible enhancement might be to abort traversal on error. 2403 */ 2404 ACPI_STATUS 2405 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 2406 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 2407 { 2408 ACPI_OBJECT *comp; 2409 int i; 2410 2411 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 2412 return (AE_BAD_PARAMETER); 2413 2414 /* Iterate over components */ 2415 i = 0; 2416 comp = pkg->Package.Elements; 2417 for (; i < pkg->Package.Count; i++, comp++) 2418 func(comp, arg); 2419 2420 return (AE_OK); 2421 } 2422 2423 /* 2424 * Find the (index)th resource object in a set. 2425 */ 2426 ACPI_STATUS 2427 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 2428 { 2429 ACPI_RESOURCE *rp; 2430 int i; 2431 2432 rp = (ACPI_RESOURCE *)buf->Pointer; 2433 i = index; 2434 while (i-- > 0) { 2435 /* Range check */ 2436 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2437 return (AE_BAD_PARAMETER); 2438 2439 /* Check for terminator */ 2440 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2441 return (AE_NOT_FOUND); 2442 rp = ACPI_NEXT_RESOURCE(rp); 2443 } 2444 if (resp != NULL) 2445 *resp = rp; 2446 2447 return (AE_OK); 2448 } 2449 2450 /* 2451 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 2452 * 2453 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 2454 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 2455 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 2456 * resources. 2457 */ 2458 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 2459 2460 ACPI_STATUS 2461 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 2462 { 2463 ACPI_RESOURCE *rp; 2464 void *newp; 2465 2466 /* Initialise the buffer if necessary. */ 2467 if (buf->Pointer == NULL) { 2468 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 2469 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 2470 return (AE_NO_MEMORY); 2471 rp = (ACPI_RESOURCE *)buf->Pointer; 2472 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2473 rp->Length = ACPI_RS_SIZE_MIN; 2474 } 2475 if (res == NULL) 2476 return (AE_OK); 2477 2478 /* 2479 * Scan the current buffer looking for the terminator. 2480 * This will either find the terminator or hit the end 2481 * of the buffer and return an error. 2482 */ 2483 rp = (ACPI_RESOURCE *)buf->Pointer; 2484 for (;;) { 2485 /* Range check, don't go outside the buffer */ 2486 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2487 return (AE_BAD_PARAMETER); 2488 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2489 break; 2490 rp = ACPI_NEXT_RESOURCE(rp); 2491 } 2492 2493 /* 2494 * Check the size of the buffer and expand if required. 2495 * 2496 * Required size is: 2497 * size of existing resources before terminator + 2498 * size of new resource and header + 2499 * size of terminator. 2500 * 2501 * Note that this loop should really only run once, unless 2502 * for some reason we are stuffing a *really* huge resource. 2503 */ 2504 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 2505 res->Length + ACPI_RS_SIZE_NO_DATA + 2506 ACPI_RS_SIZE_MIN) >= buf->Length) { 2507 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 2508 return (AE_NO_MEMORY); 2509 bcopy(buf->Pointer, newp, buf->Length); 2510 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 2511 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 2512 AcpiOsFree(buf->Pointer); 2513 buf->Pointer = newp; 2514 buf->Length += buf->Length; 2515 } 2516 2517 /* Insert the new resource. */ 2518 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA); 2519 2520 /* And add the terminator. */ 2521 rp = ACPI_NEXT_RESOURCE(rp); 2522 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2523 rp->Length = ACPI_RS_SIZE_MIN; 2524 2525 return (AE_OK); 2526 } 2527 2528 ACPI_STATUS 2529 acpi_EvaluateOSC(ACPI_HANDLE handle, uint8_t *uuid, int revision, int count, 2530 uint32_t *caps_in, uint32_t *caps_out, bool query) 2531 { 2532 ACPI_OBJECT arg[4], *ret; 2533 ACPI_OBJECT_LIST arglist; 2534 ACPI_BUFFER buf; 2535 ACPI_STATUS status; 2536 2537 arglist.Pointer = arg; 2538 arglist.Count = 4; 2539 arg[0].Type = ACPI_TYPE_BUFFER; 2540 arg[0].Buffer.Length = ACPI_UUID_LENGTH; 2541 arg[0].Buffer.Pointer = uuid; 2542 arg[1].Type = ACPI_TYPE_INTEGER; 2543 arg[1].Integer.Value = revision; 2544 arg[2].Type = ACPI_TYPE_INTEGER; 2545 arg[2].Integer.Value = count; 2546 arg[3].Type = ACPI_TYPE_BUFFER; 2547 arg[3].Buffer.Length = count * sizeof(*caps_in); 2548 arg[3].Buffer.Pointer = (uint8_t *)caps_in; 2549 caps_in[0] = query ? 1 : 0; 2550 buf.Pointer = NULL; 2551 buf.Length = ACPI_ALLOCATE_BUFFER; 2552 status = AcpiEvaluateObjectTyped(handle, "_OSC", &arglist, &buf, 2553 ACPI_TYPE_BUFFER); 2554 if (ACPI_FAILURE(status)) 2555 return (status); 2556 if (caps_out != NULL) { 2557 ret = buf.Pointer; 2558 if (ret->Buffer.Length != count * sizeof(*caps_out)) { 2559 AcpiOsFree(buf.Pointer); 2560 return (AE_BUFFER_OVERFLOW); 2561 } 2562 bcopy(ret->Buffer.Pointer, caps_out, ret->Buffer.Length); 2563 } 2564 AcpiOsFree(buf.Pointer); 2565 return (status); 2566 } 2567 2568 /* 2569 * Set interrupt model. 2570 */ 2571 ACPI_STATUS 2572 acpi_SetIntrModel(int model) 2573 { 2574 2575 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 2576 } 2577 2578 /* 2579 * Walk subtables of a table and call a callback routine for each 2580 * subtable. The caller should provide the first subtable and a 2581 * pointer to the end of the table. This can be used to walk tables 2582 * such as MADT and SRAT that use subtable entries. 2583 */ 2584 void 2585 acpi_walk_subtables(void *first, void *end, acpi_subtable_handler *handler, 2586 void *arg) 2587 { 2588 ACPI_SUBTABLE_HEADER *entry; 2589 2590 for (entry = first; (void *)entry < end; ) { 2591 /* Avoid an infinite loop if we hit a bogus entry. */ 2592 if (entry->Length < sizeof(ACPI_SUBTABLE_HEADER)) 2593 return; 2594 2595 handler(entry, arg); 2596 entry = ACPI_ADD_PTR(ACPI_SUBTABLE_HEADER, entry, entry->Length); 2597 } 2598 } 2599 2600 /* 2601 * DEPRECATED. This interface has serious deficiencies and will be 2602 * removed. 2603 * 2604 * Immediately enter the sleep state. In the old model, acpiconf(8) ran 2605 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this. 2606 */ 2607 ACPI_STATUS 2608 acpi_SetSleepState(struct acpi_softc *sc, int state) 2609 { 2610 static int once; 2611 2612 if (!once) { 2613 device_printf(sc->acpi_dev, 2614 "warning: acpi_SetSleepState() deprecated, need to update your software\n"); 2615 once = 1; 2616 } 2617 return (acpi_EnterSleepState(sc, state)); 2618 } 2619 2620 #if defined(__amd64__) || defined(__i386__) 2621 static void 2622 acpi_sleep_force_task(void *context) 2623 { 2624 struct acpi_softc *sc = (struct acpi_softc *)context; 2625 2626 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2627 device_printf(sc->acpi_dev, "force sleep state S%d failed\n", 2628 sc->acpi_next_sstate); 2629 } 2630 2631 static void 2632 acpi_sleep_force(void *arg) 2633 { 2634 struct acpi_softc *sc = (struct acpi_softc *)arg; 2635 2636 device_printf(sc->acpi_dev, 2637 "suspend request timed out, forcing sleep now\n"); 2638 /* 2639 * XXX Suspending from callout causes freezes in DEVICE_SUSPEND(). 2640 * Suspend from acpi_task thread instead. 2641 */ 2642 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 2643 acpi_sleep_force_task, sc))) 2644 device_printf(sc->acpi_dev, "AcpiOsExecute() for sleeping failed\n"); 2645 } 2646 #endif 2647 2648 /* 2649 * Request that the system enter the given suspend state. All /dev/apm 2650 * devices and devd(8) will be notified. Userland then has a chance to 2651 * save state and acknowledge the request. The system sleeps once all 2652 * acks are in. 2653 */ 2654 int 2655 acpi_ReqSleepState(struct acpi_softc *sc, int state) 2656 { 2657 #if defined(__amd64__) || defined(__i386__) 2658 struct apm_clone_data *clone; 2659 ACPI_STATUS status; 2660 2661 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX) 2662 return (EINVAL); 2663 if (!acpi_sleep_states[state]) 2664 return (EOPNOTSUPP); 2665 2666 /* 2667 * If a reboot/shutdown/suspend request is already in progress or 2668 * suspend is blocked due to an upcoming shutdown, just return. 2669 */ 2670 if (rebooting || sc->acpi_next_sstate != 0 || suspend_blocked) { 2671 return (0); 2672 } 2673 2674 /* Wait until sleep is enabled. */ 2675 while (sc->acpi_sleep_disabled) { 2676 AcpiOsSleep(1000); 2677 } 2678 2679 ACPI_LOCK(acpi); 2680 2681 sc->acpi_next_sstate = state; 2682 2683 /* S5 (soft-off) should be entered directly with no waiting. */ 2684 if (state == ACPI_STATE_S5) { 2685 ACPI_UNLOCK(acpi); 2686 status = acpi_EnterSleepState(sc, state); 2687 return (ACPI_SUCCESS(status) ? 0 : ENXIO); 2688 } 2689 2690 /* Record the pending state and notify all apm devices. */ 2691 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2692 clone->notify_status = APM_EV_NONE; 2693 if ((clone->flags & ACPI_EVF_DEVD) == 0) { 2694 selwakeuppri(&clone->sel_read, PZERO); 2695 KNOTE_LOCKED(&clone->sel_read.si_note, 0); 2696 } 2697 } 2698 2699 /* If devd(8) is not running, immediately enter the sleep state. */ 2700 if (!devctl_process_running()) { 2701 ACPI_UNLOCK(acpi); 2702 status = acpi_EnterSleepState(sc, state); 2703 return (ACPI_SUCCESS(status) ? 0 : ENXIO); 2704 } 2705 2706 /* 2707 * Set a timeout to fire if userland doesn't ack the suspend request 2708 * in time. This way we still eventually go to sleep if we were 2709 * overheating or running low on battery, even if userland is hung. 2710 * We cancel this timeout once all userland acks are in or the 2711 * suspend request is aborted. 2712 */ 2713 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc); 2714 ACPI_UNLOCK(acpi); 2715 2716 /* Now notify devd(8) also. */ 2717 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state); 2718 2719 return (0); 2720 #else 2721 /* This platform does not support acpi suspend/resume. */ 2722 return (EOPNOTSUPP); 2723 #endif 2724 } 2725 2726 /* 2727 * Acknowledge (or reject) a pending sleep state. The caller has 2728 * prepared for suspend and is now ready for it to proceed. If the 2729 * error argument is non-zero, it indicates suspend should be cancelled 2730 * and gives an errno value describing why. Once all votes are in, 2731 * we suspend the system. 2732 */ 2733 int 2734 acpi_AckSleepState(struct apm_clone_data *clone, int error) 2735 { 2736 #if defined(__amd64__) || defined(__i386__) 2737 struct acpi_softc *sc; 2738 int ret, sleeping; 2739 2740 /* If no pending sleep state, return an error. */ 2741 ACPI_LOCK(acpi); 2742 sc = clone->acpi_sc; 2743 if (sc->acpi_next_sstate == 0) { 2744 ACPI_UNLOCK(acpi); 2745 return (ENXIO); 2746 } 2747 2748 /* Caller wants to abort suspend process. */ 2749 if (error) { 2750 sc->acpi_next_sstate = 0; 2751 callout_stop(&sc->susp_force_to); 2752 device_printf(sc->acpi_dev, 2753 "listener on %s cancelled the pending suspend\n", 2754 devtoname(clone->cdev)); 2755 ACPI_UNLOCK(acpi); 2756 return (0); 2757 } 2758 2759 /* 2760 * Mark this device as acking the suspend request. Then, walk through 2761 * all devices, seeing if they agree yet. We only count devices that 2762 * are writable since read-only devices couldn't ack the request. 2763 */ 2764 sleeping = TRUE; 2765 clone->notify_status = APM_EV_ACKED; 2766 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2767 if ((clone->flags & ACPI_EVF_WRITE) != 0 && 2768 clone->notify_status != APM_EV_ACKED) { 2769 sleeping = FALSE; 2770 break; 2771 } 2772 } 2773 2774 /* If all devices have voted "yes", we will suspend now. */ 2775 if (sleeping) 2776 callout_stop(&sc->susp_force_to); 2777 ACPI_UNLOCK(acpi); 2778 ret = 0; 2779 if (sleeping) { 2780 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2781 ret = ENODEV; 2782 } 2783 return (ret); 2784 #else 2785 /* This platform does not support acpi suspend/resume. */ 2786 return (EOPNOTSUPP); 2787 #endif 2788 } 2789 2790 static void 2791 acpi_sleep_enable(void *arg) 2792 { 2793 struct acpi_softc *sc = (struct acpi_softc *)arg; 2794 2795 ACPI_LOCK_ASSERT(acpi); 2796 2797 /* Reschedule if the system is not fully up and running. */ 2798 if (!AcpiGbl_SystemAwakeAndRunning) { 2799 callout_schedule(&acpi_sleep_timer, hz * ACPI_MINIMUM_AWAKETIME); 2800 return; 2801 } 2802 2803 sc->acpi_sleep_disabled = FALSE; 2804 } 2805 2806 static ACPI_STATUS 2807 acpi_sleep_disable(struct acpi_softc *sc) 2808 { 2809 ACPI_STATUS status; 2810 2811 /* Fail if the system is not fully up and running. */ 2812 if (!AcpiGbl_SystemAwakeAndRunning) 2813 return (AE_ERROR); 2814 2815 ACPI_LOCK(acpi); 2816 status = sc->acpi_sleep_disabled ? AE_ERROR : AE_OK; 2817 sc->acpi_sleep_disabled = TRUE; 2818 ACPI_UNLOCK(acpi); 2819 2820 return (status); 2821 } 2822 2823 enum acpi_sleep_state { 2824 ACPI_SS_NONE, 2825 ACPI_SS_GPE_SET, 2826 ACPI_SS_DEV_SUSPEND, 2827 ACPI_SS_SLP_PREP, 2828 ACPI_SS_SLEPT, 2829 }; 2830 2831 /* 2832 * Enter the desired system sleep state. 2833 * 2834 * Currently we support S1-S5 but S4 is only S4BIOS 2835 */ 2836 static ACPI_STATUS 2837 acpi_EnterSleepState(struct acpi_softc *sc, int state) 2838 { 2839 register_t intr; 2840 ACPI_STATUS status; 2841 ACPI_EVENT_STATUS power_button_status; 2842 enum acpi_sleep_state slp_state; 2843 int sleep_result; 2844 2845 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2846 2847 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX) 2848 return_ACPI_STATUS (AE_BAD_PARAMETER); 2849 if (!acpi_sleep_states[state]) { 2850 device_printf(sc->acpi_dev, "Sleep state S%d not supported by BIOS\n", 2851 state); 2852 return (AE_SUPPORT); 2853 } 2854 2855 /* Re-entry once we're suspending is not allowed. */ 2856 status = acpi_sleep_disable(sc); 2857 if (ACPI_FAILURE(status)) { 2858 device_printf(sc->acpi_dev, 2859 "suspend request ignored (not ready yet)\n"); 2860 return (status); 2861 } 2862 2863 if (state == ACPI_STATE_S5) { 2864 /* 2865 * Shut down cleanly and power off. This will call us back through the 2866 * shutdown handlers. 2867 */ 2868 shutdown_nice(RB_POWEROFF); 2869 return_ACPI_STATUS (AE_OK); 2870 } 2871 2872 EVENTHANDLER_INVOKE(power_suspend_early); 2873 stop_all_proc(); 2874 EVENTHANDLER_INVOKE(power_suspend); 2875 2876 #ifdef EARLY_AP_STARTUP 2877 MPASS(mp_ncpus == 1 || smp_started); 2878 thread_lock(curthread); 2879 sched_bind(curthread, 0); 2880 thread_unlock(curthread); 2881 #else 2882 if (smp_started) { 2883 thread_lock(curthread); 2884 sched_bind(curthread, 0); 2885 thread_unlock(curthread); 2886 } 2887 #endif 2888 2889 /* 2890 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE 2891 * drivers need this. 2892 */ 2893 mtx_lock(&Giant); 2894 2895 slp_state = ACPI_SS_NONE; 2896 2897 sc->acpi_sstate = state; 2898 2899 /* Enable any GPEs as appropriate and requested by the user. */ 2900 acpi_wake_prep_walk(state); 2901 slp_state = ACPI_SS_GPE_SET; 2902 2903 /* 2904 * Inform all devices that we are going to sleep. If at least one 2905 * device fails, DEVICE_SUSPEND() automatically resumes the tree. 2906 * 2907 * XXX Note that a better two-pass approach with a 'veto' pass 2908 * followed by a "real thing" pass would be better, but the current 2909 * bus interface does not provide for this. 2910 */ 2911 if (DEVICE_SUSPEND(root_bus) != 0) { 2912 device_printf(sc->acpi_dev, "device_suspend failed\n"); 2913 goto backout; 2914 } 2915 slp_state = ACPI_SS_DEV_SUSPEND; 2916 2917 /* If testing device suspend only, back out of everything here. */ 2918 if (acpi_susp_bounce) 2919 goto backout; 2920 2921 status = AcpiEnterSleepStatePrep(state); 2922 if (ACPI_FAILURE(status)) { 2923 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2924 AcpiFormatException(status)); 2925 goto backout; 2926 } 2927 slp_state = ACPI_SS_SLP_PREP; 2928 2929 if (sc->acpi_sleep_delay > 0) 2930 DELAY(sc->acpi_sleep_delay * 1000000); 2931 2932 intr = intr_disable(); 2933 if (state != ACPI_STATE_S1) { 2934 sleep_result = acpi_sleep_machdep(sc, state); 2935 acpi_wakeup_machdep(sc, state, sleep_result, 0); 2936 2937 /* 2938 * XXX According to ACPI specification SCI_EN bit should be restored 2939 * by ACPI platform (BIOS, firmware) to its pre-sleep state. 2940 * Unfortunately some BIOSes fail to do that and that leads to 2941 * unexpected and serious consequences during wake up like a system 2942 * getting stuck in SMI handlers. 2943 * This hack is picked up from Linux, which claims that it follows 2944 * Windows behavior. 2945 */ 2946 if (sleep_result == 1 && state != ACPI_STATE_S4) 2947 AcpiWriteBitRegister(ACPI_BITREG_SCI_ENABLE, ACPI_ENABLE_EVENT); 2948 2949 AcpiLeaveSleepStatePrep(state); 2950 2951 if (sleep_result == 1 && state == ACPI_STATE_S3) { 2952 /* 2953 * Prevent mis-interpretation of the wakeup by power button 2954 * as a request for power off. 2955 * Ideally we should post an appropriate wakeup event, 2956 * perhaps using acpi_event_power_button_wake or alike. 2957 * 2958 * Clearing of power button status after wakeup is mandated 2959 * by ACPI specification in section "Fixed Power Button". 2960 * 2961 * XXX As of ACPICA 20121114 AcpiGetEventStatus provides 2962 * status as 0/1 corressponding to inactive/active despite 2963 * its type being ACPI_EVENT_STATUS. In other words, 2964 * we should not test for ACPI_EVENT_FLAG_SET for time being. 2965 */ 2966 if (ACPI_SUCCESS(AcpiGetEventStatus(ACPI_EVENT_POWER_BUTTON, 2967 &power_button_status)) && power_button_status != 0) { 2968 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 2969 device_printf(sc->acpi_dev, 2970 "cleared fixed power button status\n"); 2971 } 2972 } 2973 2974 intr_restore(intr); 2975 2976 /* call acpi_wakeup_machdep() again with interrupt enabled */ 2977 acpi_wakeup_machdep(sc, state, sleep_result, 1); 2978 2979 if (sleep_result == -1) 2980 goto backout; 2981 2982 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 2983 if (state == ACPI_STATE_S4) 2984 AcpiEnable(); 2985 } else { 2986 status = AcpiEnterSleepState(state); 2987 AcpiLeaveSleepStatePrep(state); 2988 intr_restore(intr); 2989 if (ACPI_FAILURE(status)) { 2990 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 2991 AcpiFormatException(status)); 2992 goto backout; 2993 } 2994 } 2995 slp_state = ACPI_SS_SLEPT; 2996 2997 /* 2998 * Back out state according to how far along we got in the suspend 2999 * process. This handles both the error and success cases. 3000 */ 3001 backout: 3002 if (slp_state >= ACPI_SS_GPE_SET) { 3003 acpi_wake_prep_walk(state); 3004 sc->acpi_sstate = ACPI_STATE_S0; 3005 } 3006 if (slp_state >= ACPI_SS_DEV_SUSPEND) 3007 DEVICE_RESUME(root_bus); 3008 if (slp_state >= ACPI_SS_SLP_PREP) 3009 AcpiLeaveSleepState(state); 3010 if (slp_state >= ACPI_SS_SLEPT) { 3011 acpi_resync_clock(sc); 3012 acpi_enable_fixed_events(sc); 3013 } 3014 sc->acpi_next_sstate = 0; 3015 3016 mtx_unlock(&Giant); 3017 3018 #ifdef EARLY_AP_STARTUP 3019 thread_lock(curthread); 3020 sched_unbind(curthread); 3021 thread_unlock(curthread); 3022 #else 3023 if (smp_started) { 3024 thread_lock(curthread); 3025 sched_unbind(curthread); 3026 thread_unlock(curthread); 3027 } 3028 #endif 3029 3030 resume_all_proc(); 3031 3032 EVENTHANDLER_INVOKE(power_resume); 3033 3034 /* Allow another sleep request after a while. */ 3035 callout_schedule(&acpi_sleep_timer, hz * ACPI_MINIMUM_AWAKETIME); 3036 3037 /* Run /etc/rc.resume after we are back. */ 3038 if (devctl_process_running()) 3039 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state); 3040 3041 return_ACPI_STATUS (status); 3042 } 3043 3044 static void 3045 acpi_resync_clock(struct acpi_softc *sc) 3046 { 3047 3048 /* 3049 * Warm up timecounter again and reset system clock. 3050 */ 3051 (void)timecounter->tc_get_timecount(timecounter); 3052 (void)timecounter->tc_get_timecount(timecounter); 3053 inittodr(time_second + sc->acpi_sleep_delay); 3054 } 3055 3056 /* Enable or disable the device's wake GPE. */ 3057 int 3058 acpi_wake_set_enable(device_t dev, int enable) 3059 { 3060 struct acpi_prw_data prw; 3061 ACPI_STATUS status; 3062 int flags; 3063 3064 /* Make sure the device supports waking the system and get the GPE. */ 3065 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 3066 return (ENXIO); 3067 3068 flags = acpi_get_flags(dev); 3069 if (enable) { 3070 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 3071 ACPI_GPE_ENABLE); 3072 if (ACPI_FAILURE(status)) { 3073 device_printf(dev, "enable wake failed\n"); 3074 return (ENXIO); 3075 } 3076 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); 3077 } else { 3078 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 3079 ACPI_GPE_DISABLE); 3080 if (ACPI_FAILURE(status)) { 3081 device_printf(dev, "disable wake failed\n"); 3082 return (ENXIO); 3083 } 3084 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); 3085 } 3086 3087 return (0); 3088 } 3089 3090 static int 3091 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate) 3092 { 3093 struct acpi_prw_data prw; 3094 device_t dev; 3095 3096 /* Check that this is a wake-capable device and get its GPE. */ 3097 if (acpi_parse_prw(handle, &prw) != 0) 3098 return (ENXIO); 3099 dev = acpi_get_device(handle); 3100 3101 /* 3102 * The destination sleep state must be less than (i.e., higher power) 3103 * or equal to the value specified by _PRW. If this GPE cannot be 3104 * enabled for the next sleep state, then disable it. If it can and 3105 * the user requested it be enabled, turn on any required power resources 3106 * and set _PSW. 3107 */ 3108 if (sstate > prw.lowest_wake) { 3109 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_DISABLE); 3110 if (bootverbose) 3111 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n", 3112 acpi_name(handle), sstate); 3113 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) { 3114 acpi_pwr_wake_enable(handle, 1); 3115 acpi_SetInteger(handle, "_PSW", 1); 3116 if (bootverbose) 3117 device_printf(dev, "wake_prep enabled for %s (S%d)\n", 3118 acpi_name(handle), sstate); 3119 } 3120 3121 return (0); 3122 } 3123 3124 static int 3125 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate) 3126 { 3127 struct acpi_prw_data prw; 3128 device_t dev; 3129 3130 /* 3131 * Check that this is a wake-capable device and get its GPE. Return 3132 * now if the user didn't enable this device for wake. 3133 */ 3134 if (acpi_parse_prw(handle, &prw) != 0) 3135 return (ENXIO); 3136 dev = acpi_get_device(handle); 3137 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0) 3138 return (0); 3139 3140 /* 3141 * If this GPE couldn't be enabled for the previous sleep state, it was 3142 * disabled before going to sleep so re-enable it. If it was enabled, 3143 * clear _PSW and turn off any power resources it used. 3144 */ 3145 if (sstate > prw.lowest_wake) { 3146 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_ENABLE); 3147 if (bootverbose) 3148 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle)); 3149 } else { 3150 acpi_SetInteger(handle, "_PSW", 0); 3151 acpi_pwr_wake_enable(handle, 0); 3152 if (bootverbose) 3153 device_printf(dev, "run_prep cleaned up for %s\n", 3154 acpi_name(handle)); 3155 } 3156 3157 return (0); 3158 } 3159 3160 static ACPI_STATUS 3161 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 3162 { 3163 int sstate; 3164 3165 /* If suspending, run the sleep prep function, otherwise wake. */ 3166 sstate = *(int *)context; 3167 if (AcpiGbl_SystemAwakeAndRunning) 3168 acpi_wake_sleep_prep(handle, sstate); 3169 else 3170 acpi_wake_run_prep(handle, sstate); 3171 return (AE_OK); 3172 } 3173 3174 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */ 3175 static int 3176 acpi_wake_prep_walk(int sstate) 3177 { 3178 ACPI_HANDLE sb_handle; 3179 3180 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) 3181 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100, 3182 acpi_wake_prep, NULL, &sstate, NULL); 3183 return (0); 3184 } 3185 3186 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */ 3187 static int 3188 acpi_wake_sysctl_walk(device_t dev) 3189 { 3190 int error, i, numdevs; 3191 device_t *devlist; 3192 device_t child; 3193 ACPI_STATUS status; 3194 3195 error = device_get_children(dev, &devlist, &numdevs); 3196 if (error != 0 || numdevs == 0) { 3197 if (numdevs == 0) 3198 free(devlist, M_TEMP); 3199 return (error); 3200 } 3201 for (i = 0; i < numdevs; i++) { 3202 child = devlist[i]; 3203 acpi_wake_sysctl_walk(child); 3204 if (!device_is_attached(child)) 3205 continue; 3206 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL); 3207 if (ACPI_SUCCESS(status)) { 3208 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child), 3209 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO, 3210 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0, 3211 acpi_wake_set_sysctl, "I", "Device set to wake the system"); 3212 } 3213 } 3214 free(devlist, M_TEMP); 3215 3216 return (0); 3217 } 3218 3219 /* Enable or disable wake from userland. */ 3220 static int 3221 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS) 3222 { 3223 int enable, error; 3224 device_t dev; 3225 3226 dev = (device_t)arg1; 3227 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0; 3228 3229 error = sysctl_handle_int(oidp, &enable, 0, req); 3230 if (error != 0 || req->newptr == NULL) 3231 return (error); 3232 if (enable != 0 && enable != 1) 3233 return (EINVAL); 3234 3235 return (acpi_wake_set_enable(dev, enable)); 3236 } 3237 3238 /* Parse a device's _PRW into a structure. */ 3239 int 3240 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) 3241 { 3242 ACPI_STATUS status; 3243 ACPI_BUFFER prw_buffer; 3244 ACPI_OBJECT *res, *res2; 3245 int error, i, power_count; 3246 3247 if (h == NULL || prw == NULL) 3248 return (EINVAL); 3249 3250 /* 3251 * The _PRW object (7.2.9) is only required for devices that have the 3252 * ability to wake the system from a sleeping state. 3253 */ 3254 error = EINVAL; 3255 prw_buffer.Pointer = NULL; 3256 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 3257 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 3258 if (ACPI_FAILURE(status)) 3259 return (ENOENT); 3260 res = (ACPI_OBJECT *)prw_buffer.Pointer; 3261 if (res == NULL) 3262 return (ENOENT); 3263 if (!ACPI_PKG_VALID(res, 2)) 3264 goto out; 3265 3266 /* 3267 * Element 1 of the _PRW object: 3268 * The lowest power system sleeping state that can be entered while still 3269 * providing wake functionality. The sleeping state being entered must 3270 * be less than (i.e., higher power) or equal to this value. 3271 */ 3272 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) 3273 goto out; 3274 3275 /* 3276 * Element 0 of the _PRW object: 3277 */ 3278 switch (res->Package.Elements[0].Type) { 3279 case ACPI_TYPE_INTEGER: 3280 /* 3281 * If the data type of this package element is numeric, then this 3282 * _PRW package element is the bit index in the GPEx_EN, in the 3283 * GPE blocks described in the FADT, of the enable bit that is 3284 * enabled for the wake event. 3285 */ 3286 prw->gpe_handle = NULL; 3287 prw->gpe_bit = res->Package.Elements[0].Integer.Value; 3288 error = 0; 3289 break; 3290 case ACPI_TYPE_PACKAGE: 3291 /* 3292 * If the data type of this package element is a package, then this 3293 * _PRW package element is itself a package containing two 3294 * elements. The first is an object reference to the GPE Block 3295 * device that contains the GPE that will be triggered by the wake 3296 * event. The second element is numeric and it contains the bit 3297 * index in the GPEx_EN, in the GPE Block referenced by the 3298 * first element in the package, of the enable bit that is enabled for 3299 * the wake event. 3300 * 3301 * For example, if this field is a package then it is of the form: 3302 * Package() {\_SB.PCI0.ISA.GPE, 2} 3303 */ 3304 res2 = &res->Package.Elements[0]; 3305 if (!ACPI_PKG_VALID(res2, 2)) 3306 goto out; 3307 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 3308 if (prw->gpe_handle == NULL) 3309 goto out; 3310 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) 3311 goto out; 3312 error = 0; 3313 break; 3314 default: 3315 goto out; 3316 } 3317 3318 /* Elements 2 to N of the _PRW object are power resources. */ 3319 power_count = res->Package.Count - 2; 3320 if (power_count > ACPI_PRW_MAX_POWERRES) { 3321 printf("ACPI device %s has too many power resources\n", acpi_name(h)); 3322 power_count = 0; 3323 } 3324 prw->power_res_count = power_count; 3325 for (i = 0; i < power_count; i++) 3326 prw->power_res[i] = res->Package.Elements[i]; 3327 3328 out: 3329 if (prw_buffer.Pointer != NULL) 3330 AcpiOsFree(prw_buffer.Pointer); 3331 return (error); 3332 } 3333 3334 /* 3335 * ACPI Event Handlers 3336 */ 3337 3338 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 3339 3340 static void 3341 acpi_system_eventhandler_sleep(void *arg, int state) 3342 { 3343 struct acpi_softc *sc = (struct acpi_softc *)arg; 3344 int ret; 3345 3346 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 3347 3348 /* Check if button action is disabled or unknown. */ 3349 if (state == ACPI_STATE_UNKNOWN) 3350 return; 3351 3352 /* Request that the system prepare to enter the given suspend state. */ 3353 ret = acpi_ReqSleepState(sc, state); 3354 if (ret != 0) 3355 device_printf(sc->acpi_dev, 3356 "request to enter state S%d failed (err %d)\n", state, ret); 3357 3358 return_VOID; 3359 } 3360 3361 static void 3362 acpi_system_eventhandler_wakeup(void *arg, int state) 3363 { 3364 3365 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 3366 3367 /* Currently, nothing to do for wakeup. */ 3368 3369 return_VOID; 3370 } 3371 3372 /* 3373 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 3374 */ 3375 static void 3376 acpi_invoke_sleep_eventhandler(void *context) 3377 { 3378 3379 EVENTHANDLER_INVOKE(acpi_sleep_event, *(int *)context); 3380 } 3381 3382 static void 3383 acpi_invoke_wake_eventhandler(void *context) 3384 { 3385 3386 EVENTHANDLER_INVOKE(acpi_wakeup_event, *(int *)context); 3387 } 3388 3389 UINT32 3390 acpi_event_power_button_sleep(void *context) 3391 { 3392 struct acpi_softc *sc = (struct acpi_softc *)context; 3393 3394 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3395 3396 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3397 acpi_invoke_sleep_eventhandler, &sc->acpi_power_button_sx))) 3398 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3399 return_VALUE (ACPI_INTERRUPT_HANDLED); 3400 } 3401 3402 UINT32 3403 acpi_event_power_button_wake(void *context) 3404 { 3405 struct acpi_softc *sc = (struct acpi_softc *)context; 3406 3407 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3408 3409 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3410 acpi_invoke_wake_eventhandler, &sc->acpi_power_button_sx))) 3411 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3412 return_VALUE (ACPI_INTERRUPT_HANDLED); 3413 } 3414 3415 UINT32 3416 acpi_event_sleep_button_sleep(void *context) 3417 { 3418 struct acpi_softc *sc = (struct acpi_softc *)context; 3419 3420 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3421 3422 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3423 acpi_invoke_sleep_eventhandler, &sc->acpi_sleep_button_sx))) 3424 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3425 return_VALUE (ACPI_INTERRUPT_HANDLED); 3426 } 3427 3428 UINT32 3429 acpi_event_sleep_button_wake(void *context) 3430 { 3431 struct acpi_softc *sc = (struct acpi_softc *)context; 3432 3433 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3434 3435 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3436 acpi_invoke_wake_eventhandler, &sc->acpi_sleep_button_sx))) 3437 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3438 return_VALUE (ACPI_INTERRUPT_HANDLED); 3439 } 3440 3441 /* 3442 * XXX This static buffer is suboptimal. There is no locking so only 3443 * use this for single-threaded callers. 3444 */ 3445 char * 3446 acpi_name(ACPI_HANDLE handle) 3447 { 3448 ACPI_BUFFER buf; 3449 static char data[256]; 3450 3451 buf.Length = sizeof(data); 3452 buf.Pointer = data; 3453 3454 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf))) 3455 return (data); 3456 return ("(unknown)"); 3457 } 3458 3459 /* 3460 * Debugging/bug-avoidance. Avoid trying to fetch info on various 3461 * parts of the namespace. 3462 */ 3463 int 3464 acpi_avoid(ACPI_HANDLE handle) 3465 { 3466 char *cp, *env, *np; 3467 int len; 3468 3469 np = acpi_name(handle); 3470 if (*np == '\\') 3471 np++; 3472 if ((env = kern_getenv("debug.acpi.avoid")) == NULL) 3473 return (0); 3474 3475 /* Scan the avoid list checking for a match */ 3476 cp = env; 3477 for (;;) { 3478 while (*cp != 0 && isspace(*cp)) 3479 cp++; 3480 if (*cp == 0) 3481 break; 3482 len = 0; 3483 while (cp[len] != 0 && !isspace(cp[len])) 3484 len++; 3485 if (!strncmp(cp, np, len)) { 3486 freeenv(env); 3487 return(1); 3488 } 3489 cp += len; 3490 } 3491 freeenv(env); 3492 3493 return (0); 3494 } 3495 3496 /* 3497 * Debugging/bug-avoidance. Disable ACPI subsystem components. 3498 */ 3499 int 3500 acpi_disabled(char *subsys) 3501 { 3502 char *cp, *env; 3503 int len; 3504 3505 if ((env = kern_getenv("debug.acpi.disabled")) == NULL) 3506 return (0); 3507 if (strcmp(env, "all") == 0) { 3508 freeenv(env); 3509 return (1); 3510 } 3511 3512 /* Scan the disable list, checking for a match. */ 3513 cp = env; 3514 for (;;) { 3515 while (*cp != '\0' && isspace(*cp)) 3516 cp++; 3517 if (*cp == '\0') 3518 break; 3519 len = 0; 3520 while (cp[len] != '\0' && !isspace(cp[len])) 3521 len++; 3522 if (strncmp(cp, subsys, len) == 0) { 3523 freeenv(env); 3524 return (1); 3525 } 3526 cp += len; 3527 } 3528 freeenv(env); 3529 3530 return (0); 3531 } 3532 3533 static void 3534 acpi_lookup(void *arg, const char *name, device_t *dev) 3535 { 3536 ACPI_HANDLE handle; 3537 3538 if (*dev != NULL) 3539 return; 3540 3541 /* 3542 * Allow any handle name that is specified as an absolute path and 3543 * starts with '\'. We could restrict this to \_SB and friends, 3544 * but see acpi_probe_children() for notes on why we scan the entire 3545 * namespace for devices. 3546 * 3547 * XXX: The pathname argument to AcpiGetHandle() should be fixed to 3548 * be const. 3549 */ 3550 if (name[0] != '\\') 3551 return; 3552 if (ACPI_FAILURE(AcpiGetHandle(ACPI_ROOT_OBJECT, __DECONST(char *, name), 3553 &handle))) 3554 return; 3555 *dev = acpi_get_device(handle); 3556 } 3557 3558 /* 3559 * Control interface. 3560 * 3561 * We multiplex ioctls for all participating ACPI devices here. Individual 3562 * drivers wanting to be accessible via /dev/acpi should use the 3563 * register/deregister interface to make their handlers visible. 3564 */ 3565 struct acpi_ioctl_hook 3566 { 3567 TAILQ_ENTRY(acpi_ioctl_hook) link; 3568 u_long cmd; 3569 acpi_ioctl_fn fn; 3570 void *arg; 3571 }; 3572 3573 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 3574 static int acpi_ioctl_hooks_initted; 3575 3576 int 3577 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 3578 { 3579 struct acpi_ioctl_hook *hp; 3580 3581 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 3582 return (ENOMEM); 3583 hp->cmd = cmd; 3584 hp->fn = fn; 3585 hp->arg = arg; 3586 3587 ACPI_LOCK(acpi); 3588 if (acpi_ioctl_hooks_initted == 0) { 3589 TAILQ_INIT(&acpi_ioctl_hooks); 3590 acpi_ioctl_hooks_initted = 1; 3591 } 3592 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 3593 ACPI_UNLOCK(acpi); 3594 3595 return (0); 3596 } 3597 3598 void 3599 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 3600 { 3601 struct acpi_ioctl_hook *hp; 3602 3603 ACPI_LOCK(acpi); 3604 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 3605 if (hp->cmd == cmd && hp->fn == fn) 3606 break; 3607 3608 if (hp != NULL) { 3609 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 3610 free(hp, M_ACPIDEV); 3611 } 3612 ACPI_UNLOCK(acpi); 3613 } 3614 3615 static int 3616 acpiopen(struct cdev *dev, int flag, int fmt, struct thread *td) 3617 { 3618 return (0); 3619 } 3620 3621 static int 3622 acpiclose(struct cdev *dev, int flag, int fmt, struct thread *td) 3623 { 3624 return (0); 3625 } 3626 3627 static int 3628 acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 3629 { 3630 struct acpi_softc *sc; 3631 struct acpi_ioctl_hook *hp; 3632 int error, state; 3633 3634 error = 0; 3635 hp = NULL; 3636 sc = dev->si_drv1; 3637 3638 /* 3639 * Scan the list of registered ioctls, looking for handlers. 3640 */ 3641 ACPI_LOCK(acpi); 3642 if (acpi_ioctl_hooks_initted) 3643 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 3644 if (hp->cmd == cmd) 3645 break; 3646 } 3647 ACPI_UNLOCK(acpi); 3648 if (hp) 3649 return (hp->fn(cmd, addr, hp->arg)); 3650 3651 /* 3652 * Core ioctls are not permitted for non-writable user. 3653 * Currently, other ioctls just fetch information. 3654 * Not changing system behavior. 3655 */ 3656 if ((flag & FWRITE) == 0) 3657 return (EPERM); 3658 3659 /* Core system ioctls. */ 3660 switch (cmd) { 3661 case ACPIIO_REQSLPSTATE: 3662 state = *(int *)addr; 3663 if (state != ACPI_STATE_S5) 3664 return (acpi_ReqSleepState(sc, state)); 3665 device_printf(sc->acpi_dev, "power off via acpi ioctl not supported\n"); 3666 error = EOPNOTSUPP; 3667 break; 3668 case ACPIIO_ACKSLPSTATE: 3669 error = *(int *)addr; 3670 error = acpi_AckSleepState(sc->acpi_clone, error); 3671 break; 3672 case ACPIIO_SETSLPSTATE: /* DEPRECATED */ 3673 state = *(int *)addr; 3674 if (state < ACPI_STATE_S0 || state > ACPI_S_STATES_MAX) 3675 return (EINVAL); 3676 if (!acpi_sleep_states[state]) 3677 return (EOPNOTSUPP); 3678 if (ACPI_FAILURE(acpi_SetSleepState(sc, state))) 3679 error = ENXIO; 3680 break; 3681 default: 3682 error = ENXIO; 3683 break; 3684 } 3685 3686 return (error); 3687 } 3688 3689 static int 3690 acpi_sname2sstate(const char *sname) 3691 { 3692 int sstate; 3693 3694 if (toupper(sname[0]) == 'S') { 3695 sstate = sname[1] - '0'; 3696 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5 && 3697 sname[2] == '\0') 3698 return (sstate); 3699 } else if (strcasecmp(sname, "NONE") == 0) 3700 return (ACPI_STATE_UNKNOWN); 3701 return (-1); 3702 } 3703 3704 static const char * 3705 acpi_sstate2sname(int sstate) 3706 { 3707 static const char *snames[] = { "S0", "S1", "S2", "S3", "S4", "S5" }; 3708 3709 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5) 3710 return (snames[sstate]); 3711 else if (sstate == ACPI_STATE_UNKNOWN) 3712 return ("NONE"); 3713 return (NULL); 3714 } 3715 3716 static int 3717 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3718 { 3719 int error; 3720 struct sbuf sb; 3721 UINT8 state; 3722 3723 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND); 3724 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++) 3725 if (acpi_sleep_states[state]) 3726 sbuf_printf(&sb, "%s ", acpi_sstate2sname(state)); 3727 sbuf_trim(&sb); 3728 sbuf_finish(&sb); 3729 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 3730 sbuf_delete(&sb); 3731 return (error); 3732 } 3733 3734 static int 3735 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3736 { 3737 char sleep_state[10]; 3738 int error, new_state, old_state; 3739 3740 old_state = *(int *)oidp->oid_arg1; 3741 strlcpy(sleep_state, acpi_sstate2sname(old_state), sizeof(sleep_state)); 3742 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 3743 if (error == 0 && req->newptr != NULL) { 3744 new_state = acpi_sname2sstate(sleep_state); 3745 if (new_state < ACPI_STATE_S1) 3746 return (EINVAL); 3747 if (new_state < ACPI_S_STATE_COUNT && !acpi_sleep_states[new_state]) 3748 return (EOPNOTSUPP); 3749 if (new_state != old_state) 3750 *(int *)oidp->oid_arg1 = new_state; 3751 } 3752 return (error); 3753 } 3754 3755 /* Inform devctl(4) when we receive a Notify. */ 3756 void 3757 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 3758 { 3759 char notify_buf[16]; 3760 ACPI_BUFFER handle_buf; 3761 ACPI_STATUS status; 3762 3763 if (subsystem == NULL) 3764 return; 3765 3766 handle_buf.Pointer = NULL; 3767 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 3768 status = AcpiNsHandleToPathname(h, &handle_buf, FALSE); 3769 if (ACPI_FAILURE(status)) 3770 return; 3771 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 3772 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 3773 AcpiOsFree(handle_buf.Pointer); 3774 } 3775 3776 #ifdef ACPI_DEBUG 3777 /* 3778 * Support for parsing debug options from the kernel environment. 3779 * 3780 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 3781 * by specifying the names of the bits in the debug.acpi.layer and 3782 * debug.acpi.level environment variables. Bits may be unset by 3783 * prefixing the bit name with !. 3784 */ 3785 struct debugtag 3786 { 3787 char *name; 3788 UINT32 value; 3789 }; 3790 3791 static struct debugtag dbg_layer[] = { 3792 {"ACPI_UTILITIES", ACPI_UTILITIES}, 3793 {"ACPI_HARDWARE", ACPI_HARDWARE}, 3794 {"ACPI_EVENTS", ACPI_EVENTS}, 3795 {"ACPI_TABLES", ACPI_TABLES}, 3796 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 3797 {"ACPI_PARSER", ACPI_PARSER}, 3798 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 3799 {"ACPI_EXECUTER", ACPI_EXECUTER}, 3800 {"ACPI_RESOURCES", ACPI_RESOURCES}, 3801 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 3802 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 3803 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 3804 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 3805 3806 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 3807 {"ACPI_BATTERY", ACPI_BATTERY}, 3808 {"ACPI_BUS", ACPI_BUS}, 3809 {"ACPI_BUTTON", ACPI_BUTTON}, 3810 {"ACPI_EC", ACPI_EC}, 3811 {"ACPI_FAN", ACPI_FAN}, 3812 {"ACPI_POWERRES", ACPI_POWERRES}, 3813 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 3814 {"ACPI_THERMAL", ACPI_THERMAL}, 3815 {"ACPI_TIMER", ACPI_TIMER}, 3816 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 3817 {NULL, 0} 3818 }; 3819 3820 static struct debugtag dbg_level[] = { 3821 {"ACPI_LV_INIT", ACPI_LV_INIT}, 3822 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 3823 {"ACPI_LV_INFO", ACPI_LV_INFO}, 3824 {"ACPI_LV_REPAIR", ACPI_LV_REPAIR}, 3825 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 3826 3827 /* Trace verbosity level 1 [Standard Trace Level] */ 3828 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 3829 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 3830 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 3831 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 3832 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 3833 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 3834 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 3835 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 3836 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 3837 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 3838 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 3839 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 3840 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 3841 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 3842 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 3843 3844 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 3845 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 3846 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 3847 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 3848 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 3849 {"ACPI_LV_ALL", ACPI_LV_ALL}, 3850 3851 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 3852 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 3853 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 3854 {"ACPI_LV_IO", ACPI_LV_IO}, 3855 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 3856 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 3857 3858 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 3859 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 3860 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 3861 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 3862 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 3863 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 3864 {NULL, 0} 3865 }; 3866 3867 static void 3868 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 3869 { 3870 char *ep; 3871 int i, l; 3872 int set; 3873 3874 while (*cp) { 3875 if (isspace(*cp)) { 3876 cp++; 3877 continue; 3878 } 3879 ep = cp; 3880 while (*ep && !isspace(*ep)) 3881 ep++; 3882 if (*cp == '!') { 3883 set = 0; 3884 cp++; 3885 if (cp == ep) 3886 continue; 3887 } else { 3888 set = 1; 3889 } 3890 l = ep - cp; 3891 for (i = 0; tag[i].name != NULL; i++) { 3892 if (!strncmp(cp, tag[i].name, l)) { 3893 if (set) 3894 *flag |= tag[i].value; 3895 else 3896 *flag &= ~tag[i].value; 3897 } 3898 } 3899 cp = ep; 3900 } 3901 } 3902 3903 static void 3904 acpi_set_debugging(void *junk) 3905 { 3906 char *layer, *level; 3907 3908 if (cold) { 3909 AcpiDbgLayer = 0; 3910 AcpiDbgLevel = 0; 3911 } 3912 3913 layer = kern_getenv("debug.acpi.layer"); 3914 level = kern_getenv("debug.acpi.level"); 3915 if (layer == NULL && level == NULL) 3916 return; 3917 3918 printf("ACPI set debug"); 3919 if (layer != NULL) { 3920 if (strcmp("NONE", layer) != 0) 3921 printf(" layer '%s'", layer); 3922 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer); 3923 freeenv(layer); 3924 } 3925 if (level != NULL) { 3926 if (strcmp("NONE", level) != 0) 3927 printf(" level '%s'", level); 3928 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel); 3929 freeenv(level); 3930 } 3931 printf("\n"); 3932 } 3933 3934 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 3935 NULL); 3936 3937 static int 3938 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 3939 { 3940 int error, *dbg; 3941 struct debugtag *tag; 3942 struct sbuf sb; 3943 char temp[128]; 3944 3945 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 3946 return (ENOMEM); 3947 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 3948 tag = &dbg_layer[0]; 3949 dbg = &AcpiDbgLayer; 3950 } else { 3951 tag = &dbg_level[0]; 3952 dbg = &AcpiDbgLevel; 3953 } 3954 3955 /* Get old values if this is a get request. */ 3956 ACPI_SERIAL_BEGIN(acpi); 3957 if (*dbg == 0) { 3958 sbuf_cpy(&sb, "NONE"); 3959 } else if (req->newptr == NULL) { 3960 for (; tag->name != NULL; tag++) { 3961 if ((*dbg & tag->value) == tag->value) 3962 sbuf_printf(&sb, "%s ", tag->name); 3963 } 3964 } 3965 sbuf_trim(&sb); 3966 sbuf_finish(&sb); 3967 strlcpy(temp, sbuf_data(&sb), sizeof(temp)); 3968 sbuf_delete(&sb); 3969 3970 error = sysctl_handle_string(oidp, temp, sizeof(temp), req); 3971 3972 /* Check for error or no change */ 3973 if (error == 0 && req->newptr != NULL) { 3974 *dbg = 0; 3975 kern_setenv((char *)oidp->oid_arg1, temp); 3976 acpi_set_debugging(NULL); 3977 } 3978 ACPI_SERIAL_END(acpi); 3979 3980 return (error); 3981 } 3982 3983 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 3984 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 3985 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 3986 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 3987 #endif /* ACPI_DEBUG */ 3988 3989 static int 3990 acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS) 3991 { 3992 int error; 3993 int old; 3994 3995 old = acpi_debug_objects; 3996 error = sysctl_handle_int(oidp, &acpi_debug_objects, 0, req); 3997 if (error != 0 || req->newptr == NULL) 3998 return (error); 3999 if (old == acpi_debug_objects || (old && acpi_debug_objects)) 4000 return (0); 4001 4002 ACPI_SERIAL_BEGIN(acpi); 4003 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE; 4004 ACPI_SERIAL_END(acpi); 4005 4006 return (0); 4007 } 4008 4009 static int 4010 acpi_parse_interfaces(char *str, struct acpi_interface *iface) 4011 { 4012 char *p; 4013 size_t len; 4014 int i, j; 4015 4016 p = str; 4017 while (isspace(*p) || *p == ',') 4018 p++; 4019 len = strlen(p); 4020 if (len == 0) 4021 return (0); 4022 p = strdup(p, M_TEMP); 4023 for (i = 0; i < len; i++) 4024 if (p[i] == ',') 4025 p[i] = '\0'; 4026 i = j = 0; 4027 while (i < len) 4028 if (isspace(p[i]) || p[i] == '\0') 4029 i++; 4030 else { 4031 i += strlen(p + i) + 1; 4032 j++; 4033 } 4034 if (j == 0) { 4035 free(p, M_TEMP); 4036 return (0); 4037 } 4038 iface->data = malloc(sizeof(*iface->data) * j, M_TEMP, M_WAITOK); 4039 iface->num = j; 4040 i = j = 0; 4041 while (i < len) 4042 if (isspace(p[i]) || p[i] == '\0') 4043 i++; 4044 else { 4045 iface->data[j] = p + i; 4046 i += strlen(p + i) + 1; 4047 j++; 4048 } 4049 4050 return (j); 4051 } 4052 4053 static void 4054 acpi_free_interfaces(struct acpi_interface *iface) 4055 { 4056 4057 free(iface->data[0], M_TEMP); 4058 free(iface->data, M_TEMP); 4059 } 4060 4061 static void 4062 acpi_reset_interfaces(device_t dev) 4063 { 4064 struct acpi_interface list; 4065 ACPI_STATUS status; 4066 int i; 4067 4068 if (acpi_parse_interfaces(acpi_install_interface, &list) > 0) { 4069 for (i = 0; i < list.num; i++) { 4070 status = AcpiInstallInterface(list.data[i]); 4071 if (ACPI_FAILURE(status)) 4072 device_printf(dev, 4073 "failed to install _OSI(\"%s\"): %s\n", 4074 list.data[i], AcpiFormatException(status)); 4075 else if (bootverbose) 4076 device_printf(dev, "installed _OSI(\"%s\")\n", 4077 list.data[i]); 4078 } 4079 acpi_free_interfaces(&list); 4080 } 4081 if (acpi_parse_interfaces(acpi_remove_interface, &list) > 0) { 4082 for (i = 0; i < list.num; i++) { 4083 status = AcpiRemoveInterface(list.data[i]); 4084 if (ACPI_FAILURE(status)) 4085 device_printf(dev, 4086 "failed to remove _OSI(\"%s\"): %s\n", 4087 list.data[i], AcpiFormatException(status)); 4088 else if (bootverbose) 4089 device_printf(dev, "removed _OSI(\"%s\")\n", 4090 list.data[i]); 4091 } 4092 acpi_free_interfaces(&list); 4093 } 4094 } 4095 4096 static int 4097 acpi_pm_func(u_long cmd, void *arg, ...) 4098 { 4099 int state, acpi_state; 4100 int error; 4101 struct acpi_softc *sc; 4102 va_list ap; 4103 4104 error = 0; 4105 switch (cmd) { 4106 case POWER_CMD_SUSPEND: 4107 sc = (struct acpi_softc *)arg; 4108 if (sc == NULL) { 4109 error = EINVAL; 4110 goto out; 4111 } 4112 4113 va_start(ap, arg); 4114 state = va_arg(ap, int); 4115 va_end(ap); 4116 4117 switch (state) { 4118 case POWER_SLEEP_STATE_STANDBY: 4119 acpi_state = sc->acpi_standby_sx; 4120 break; 4121 case POWER_SLEEP_STATE_SUSPEND: 4122 acpi_state = sc->acpi_suspend_sx; 4123 break; 4124 case POWER_SLEEP_STATE_HIBERNATE: 4125 acpi_state = ACPI_STATE_S4; 4126 break; 4127 default: 4128 error = EINVAL; 4129 goto out; 4130 } 4131 4132 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state))) 4133 error = ENXIO; 4134 break; 4135 default: 4136 error = EINVAL; 4137 goto out; 4138 } 4139 4140 out: 4141 return (error); 4142 } 4143 4144 static void 4145 acpi_pm_register(void *arg) 4146 { 4147 if (!cold || resource_disabled("acpi", 0)) 4148 return; 4149 4150 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 4151 } 4152 4153 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 4154