1 /*- 2 * Copyright (c) 2000 Takanori Watanabe <takawata@jp.freebsd.org> 3 * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.freebsd.org> 4 * Copyright (c) 2000, 2001 Michael Smith 5 * Copyright (c) 2000 BSDi 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include "opt_acpi.h" 34 #include <sys/param.h> 35 #include <sys/kernel.h> 36 #include <sys/proc.h> 37 #include <sys/fcntl.h> 38 #include <sys/malloc.h> 39 #include <sys/module.h> 40 #include <sys/bus.h> 41 #include <sys/conf.h> 42 #include <sys/ioccom.h> 43 #include <sys/reboot.h> 44 #include <sys/sysctl.h> 45 #include <sys/ctype.h> 46 #include <sys/linker.h> 47 #include <sys/power.h> 48 #include <sys/sbuf.h> 49 #include <sys/sched.h> 50 #include <sys/smp.h> 51 #include <sys/timetc.h> 52 53 #if defined(__i386__) || defined(__amd64__) 54 #include <machine/pci_cfgreg.h> 55 #endif 56 #include <machine/resource.h> 57 #include <machine/bus.h> 58 #include <sys/rman.h> 59 #include <isa/isavar.h> 60 #include <isa/pnpvar.h> 61 62 #include <contrib/dev/acpica/include/acpi.h> 63 #include <contrib/dev/acpica/include/accommon.h> 64 #include <contrib/dev/acpica/include/acnamesp.h> 65 66 #include <dev/acpica/acpivar.h> 67 #include <dev/acpica/acpiio.h> 68 69 #include <vm/vm_param.h> 70 71 static MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 72 73 /* Hooks for the ACPI CA debugging infrastructure */ 74 #define _COMPONENT ACPI_BUS 75 ACPI_MODULE_NAME("ACPI") 76 77 static d_open_t acpiopen; 78 static d_close_t acpiclose; 79 static d_ioctl_t acpiioctl; 80 81 static struct cdevsw acpi_cdevsw = { 82 .d_version = D_VERSION, 83 .d_open = acpiopen, 84 .d_close = acpiclose, 85 .d_ioctl = acpiioctl, 86 .d_name = "acpi", 87 }; 88 89 struct acpi_interface { 90 ACPI_STRING *data; 91 int num; 92 }; 93 94 /* Global mutex for locking access to the ACPI subsystem. */ 95 struct mtx acpi_mutex; 96 struct callout acpi_sleep_timer; 97 98 /* Bitmap of device quirks. */ 99 int acpi_quirks; 100 101 /* Supported sleep states. */ 102 static BOOLEAN acpi_sleep_states[ACPI_S_STATE_COUNT]; 103 104 static void acpi_lookup(void *arg, const char *name, device_t *dev); 105 static int acpi_modevent(struct module *mod, int event, void *junk); 106 static int acpi_probe(device_t dev); 107 static int acpi_attach(device_t dev); 108 static int acpi_suspend(device_t dev); 109 static int acpi_resume(device_t dev); 110 static int acpi_shutdown(device_t dev); 111 static device_t acpi_add_child(device_t bus, u_int order, const char *name, 112 int unit); 113 static int acpi_print_child(device_t bus, device_t child); 114 static void acpi_probe_nomatch(device_t bus, device_t child); 115 static void acpi_driver_added(device_t dev, driver_t *driver); 116 static int acpi_read_ivar(device_t dev, device_t child, int index, 117 uintptr_t *result); 118 static int acpi_write_ivar(device_t dev, device_t child, int index, 119 uintptr_t value); 120 static struct resource_list *acpi_get_rlist(device_t dev, device_t child); 121 static void acpi_reserve_resources(device_t dev); 122 static int acpi_sysres_alloc(device_t dev); 123 static int acpi_set_resource(device_t dev, device_t child, int type, 124 int rid, u_long start, u_long count); 125 static struct resource *acpi_alloc_resource(device_t bus, device_t child, 126 int type, int *rid, u_long start, u_long end, 127 u_long count, u_int flags); 128 static int acpi_adjust_resource(device_t bus, device_t child, int type, 129 struct resource *r, u_long start, u_long end); 130 static int acpi_release_resource(device_t bus, device_t child, int type, 131 int rid, struct resource *r); 132 static void acpi_delete_resource(device_t bus, device_t child, int type, 133 int rid); 134 static uint32_t acpi_isa_get_logicalid(device_t dev); 135 static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count); 136 static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids); 137 static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev, 138 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters, 139 ACPI_BUFFER *ret); 140 static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, 141 void *context, void **retval); 142 static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev, 143 int max_depth, acpi_scan_cb_t user_fn, void *arg); 144 static int acpi_set_powerstate(device_t child, int state); 145 static int acpi_isa_pnp_probe(device_t bus, device_t child, 146 struct isa_pnp_id *ids); 147 static void acpi_probe_children(device_t bus); 148 static void acpi_probe_order(ACPI_HANDLE handle, int *order); 149 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, 150 void *context, void **status); 151 static void acpi_sleep_enable(void *arg); 152 static ACPI_STATUS acpi_sleep_disable(struct acpi_softc *sc); 153 static ACPI_STATUS acpi_EnterSleepState(struct acpi_softc *sc, int state); 154 static void acpi_shutdown_final(void *arg, int howto); 155 static void acpi_enable_fixed_events(struct acpi_softc *sc); 156 static BOOLEAN acpi_has_hid(ACPI_HANDLE handle); 157 static void acpi_resync_clock(struct acpi_softc *sc); 158 static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate); 159 static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate); 160 static int acpi_wake_prep_walk(int sstate); 161 static int acpi_wake_sysctl_walk(device_t dev); 162 static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS); 163 static void acpi_system_eventhandler_sleep(void *arg, int state); 164 static void acpi_system_eventhandler_wakeup(void *arg, int state); 165 static int acpi_sname2sstate(const char *sname); 166 static const char *acpi_sstate2sname(int sstate); 167 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 168 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 169 static int acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS); 170 static int acpi_pm_func(u_long cmd, void *arg, ...); 171 static int acpi_child_location_str_method(device_t acdev, device_t child, 172 char *buf, size_t buflen); 173 static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child, 174 char *buf, size_t buflen); 175 #if defined(__i386__) || defined(__amd64__) 176 static void acpi_enable_pcie(void); 177 #endif 178 static void acpi_hint_device_unit(device_t acdev, device_t child, 179 const char *name, int *unitp); 180 static void acpi_reset_interfaces(device_t dev); 181 182 static device_method_t acpi_methods[] = { 183 /* Device interface */ 184 DEVMETHOD(device_probe, acpi_probe), 185 DEVMETHOD(device_attach, acpi_attach), 186 DEVMETHOD(device_shutdown, acpi_shutdown), 187 DEVMETHOD(device_detach, bus_generic_detach), 188 DEVMETHOD(device_suspend, acpi_suspend), 189 DEVMETHOD(device_resume, acpi_resume), 190 191 /* Bus interface */ 192 DEVMETHOD(bus_add_child, acpi_add_child), 193 DEVMETHOD(bus_print_child, acpi_print_child), 194 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch), 195 DEVMETHOD(bus_driver_added, acpi_driver_added), 196 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 197 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 198 DEVMETHOD(bus_get_resource_list, acpi_get_rlist), 199 DEVMETHOD(bus_set_resource, acpi_set_resource), 200 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 201 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 202 DEVMETHOD(bus_adjust_resource, acpi_adjust_resource), 203 DEVMETHOD(bus_release_resource, acpi_release_resource), 204 DEVMETHOD(bus_delete_resource, acpi_delete_resource), 205 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method), 206 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method), 207 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 208 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 209 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 210 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 211 DEVMETHOD(bus_hint_device_unit, acpi_hint_device_unit), 212 DEVMETHOD(bus_get_domain, acpi_get_domain), 213 214 /* ACPI bus */ 215 DEVMETHOD(acpi_id_probe, acpi_device_id_probe), 216 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj), 217 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep), 218 DEVMETHOD(acpi_scan_children, acpi_device_scan_children), 219 220 /* ISA emulation */ 221 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 222 223 DEVMETHOD_END 224 }; 225 226 static driver_t acpi_driver = { 227 "acpi", 228 acpi_methods, 229 sizeof(struct acpi_softc), 230 }; 231 232 static devclass_t acpi_devclass; 233 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0); 234 MODULE_VERSION(acpi, 1); 235 236 ACPI_SERIAL_DECL(acpi, "ACPI root bus"); 237 238 /* Local pools for managing system resources for ACPI child devices. */ 239 static struct rman acpi_rman_io, acpi_rman_mem; 240 241 #define ACPI_MINIMUM_AWAKETIME 5 242 243 /* Holds the description of the acpi0 device. */ 244 static char acpi_desc[ACPI_OEM_ID_SIZE + ACPI_OEM_TABLE_ID_SIZE + 2]; 245 246 SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging"); 247 static char acpi_ca_version[12]; 248 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, 249 acpi_ca_version, 0, "Version of Intel ACPI-CA"); 250 251 /* 252 * Allow overriding _OSI methods. 253 */ 254 static char acpi_install_interface[256]; 255 TUNABLE_STR("hw.acpi.install_interface", acpi_install_interface, 256 sizeof(acpi_install_interface)); 257 static char acpi_remove_interface[256]; 258 TUNABLE_STR("hw.acpi.remove_interface", acpi_remove_interface, 259 sizeof(acpi_remove_interface)); 260 261 /* Allow users to dump Debug objects without ACPI debugger. */ 262 static int acpi_debug_objects; 263 TUNABLE_INT("debug.acpi.enable_debug_objects", &acpi_debug_objects); 264 SYSCTL_PROC(_debug_acpi, OID_AUTO, enable_debug_objects, 265 CTLFLAG_RW | CTLTYPE_INT, NULL, 0, acpi_debug_objects_sysctl, "I", 266 "Enable Debug objects"); 267 268 /* Allow the interpreter to ignore common mistakes in BIOS. */ 269 static int acpi_interpreter_slack = 1; 270 TUNABLE_INT("debug.acpi.interpreter_slack", &acpi_interpreter_slack); 271 SYSCTL_INT(_debug_acpi, OID_AUTO, interpreter_slack, CTLFLAG_RDTUN, 272 &acpi_interpreter_slack, 1, "Turn on interpreter slack mode."); 273 274 /* Ignore register widths set by FADT and use default widths instead. */ 275 static int acpi_ignore_reg_width = 1; 276 TUNABLE_INT("debug.acpi.default_register_width", &acpi_ignore_reg_width); 277 SYSCTL_INT(_debug_acpi, OID_AUTO, default_register_width, CTLFLAG_RDTUN, 278 &acpi_ignore_reg_width, 1, "Ignore register widths set by FADT"); 279 280 #ifdef __amd64__ 281 /* Reset system clock while resuming. XXX Remove once tested. */ 282 static int acpi_reset_clock = 1; 283 TUNABLE_INT("debug.acpi.reset_clock", &acpi_reset_clock); 284 SYSCTL_INT(_debug_acpi, OID_AUTO, reset_clock, CTLFLAG_RW, 285 &acpi_reset_clock, 1, "Reset system clock while resuming."); 286 #endif 287 288 /* Allow users to override quirks. */ 289 TUNABLE_INT("debug.acpi.quirks", &acpi_quirks); 290 291 static int acpi_susp_bounce; 292 SYSCTL_INT(_debug_acpi, OID_AUTO, suspend_bounce, CTLFLAG_RW, 293 &acpi_susp_bounce, 0, "Don't actually suspend, just test devices."); 294 295 /* 296 * ACPI can only be loaded as a module by the loader; activating it after 297 * system bootstrap time is not useful, and can be fatal to the system. 298 * It also cannot be unloaded, since the entire system bus hierarchy hangs 299 * off it. 300 */ 301 static int 302 acpi_modevent(struct module *mod, int event, void *junk) 303 { 304 switch (event) { 305 case MOD_LOAD: 306 if (!cold) { 307 printf("The ACPI driver cannot be loaded after boot.\n"); 308 return (EPERM); 309 } 310 break; 311 case MOD_UNLOAD: 312 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 313 return (EBUSY); 314 break; 315 default: 316 break; 317 } 318 return (0); 319 } 320 321 /* 322 * Perform early initialization. 323 */ 324 ACPI_STATUS 325 acpi_Startup(void) 326 { 327 static int started = 0; 328 ACPI_STATUS status; 329 int val; 330 331 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 332 333 /* Only run the startup code once. The MADT driver also calls this. */ 334 if (started) 335 return_VALUE (AE_OK); 336 started = 1; 337 338 /* 339 * Pre-allocate space for RSDT/XSDT and DSDT tables and allow resizing 340 * if more tables exist. 341 */ 342 if (ACPI_FAILURE(status = AcpiInitializeTables(NULL, 2, TRUE))) { 343 printf("ACPI: Table initialisation failed: %s\n", 344 AcpiFormatException(status)); 345 return_VALUE (status); 346 } 347 348 /* Set up any quirks we have for this system. */ 349 if (acpi_quirks == ACPI_Q_OK) 350 acpi_table_quirks(&acpi_quirks); 351 352 /* If the user manually set the disabled hint to 0, force-enable ACPI. */ 353 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0) 354 acpi_quirks &= ~ACPI_Q_BROKEN; 355 if (acpi_quirks & ACPI_Q_BROKEN) { 356 printf("ACPI disabled by blacklist. Contact your BIOS vendor.\n"); 357 status = AE_SUPPORT; 358 } 359 360 return_VALUE (status); 361 } 362 363 /* 364 * Detect ACPI and perform early initialisation. 365 */ 366 int 367 acpi_identify(void) 368 { 369 ACPI_TABLE_RSDP *rsdp; 370 ACPI_TABLE_HEADER *rsdt; 371 ACPI_PHYSICAL_ADDRESS paddr; 372 struct sbuf sb; 373 374 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 375 376 if (!cold) 377 return (ENXIO); 378 379 /* Check that we haven't been disabled with a hint. */ 380 if (resource_disabled("acpi", 0)) 381 return (ENXIO); 382 383 /* Check for other PM systems. */ 384 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 385 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 386 printf("ACPI identify failed, other PM system enabled.\n"); 387 return (ENXIO); 388 } 389 390 /* Initialize root tables. */ 391 if (ACPI_FAILURE(acpi_Startup())) { 392 printf("ACPI: Try disabling either ACPI or apic support.\n"); 393 return (ENXIO); 394 } 395 396 if ((paddr = AcpiOsGetRootPointer()) == 0 || 397 (rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP))) == NULL) 398 return (ENXIO); 399 if (rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress != 0) 400 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress; 401 else 402 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress; 403 AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP)); 404 405 if ((rsdt = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER))) == NULL) 406 return (ENXIO); 407 sbuf_new(&sb, acpi_desc, sizeof(acpi_desc), SBUF_FIXEDLEN); 408 sbuf_bcat(&sb, rsdt->OemId, ACPI_OEM_ID_SIZE); 409 sbuf_trim(&sb); 410 sbuf_putc(&sb, ' '); 411 sbuf_bcat(&sb, rsdt->OemTableId, ACPI_OEM_TABLE_ID_SIZE); 412 sbuf_trim(&sb); 413 sbuf_finish(&sb); 414 sbuf_delete(&sb); 415 AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER)); 416 417 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%x", ACPI_CA_VERSION); 418 419 return (0); 420 } 421 422 /* 423 * Fetch some descriptive data from ACPI to put in our attach message. 424 */ 425 static int 426 acpi_probe(device_t dev) 427 { 428 429 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 430 431 device_set_desc(dev, acpi_desc); 432 433 return_VALUE (BUS_PROBE_NOWILDCARD); 434 } 435 436 static int 437 acpi_attach(device_t dev) 438 { 439 struct acpi_softc *sc; 440 ACPI_STATUS status; 441 int error, state; 442 UINT32 flags; 443 UINT8 TypeA, TypeB; 444 char *env; 445 446 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 447 448 sc = device_get_softc(dev); 449 sc->acpi_dev = dev; 450 callout_init(&sc->susp_force_to, TRUE); 451 452 error = ENXIO; 453 454 /* Initialize resource manager. */ 455 acpi_rman_io.rm_type = RMAN_ARRAY; 456 acpi_rman_io.rm_start = 0; 457 acpi_rman_io.rm_end = 0xffff; 458 acpi_rman_io.rm_descr = "ACPI I/O ports"; 459 if (rman_init(&acpi_rman_io) != 0) 460 panic("acpi rman_init IO ports failed"); 461 acpi_rman_mem.rm_type = RMAN_ARRAY; 462 acpi_rman_mem.rm_start = 0; 463 acpi_rman_mem.rm_end = ~0ul; 464 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses"; 465 if (rman_init(&acpi_rman_mem) != 0) 466 panic("acpi rman_init memory failed"); 467 468 /* Initialise the ACPI mutex */ 469 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF); 470 471 /* 472 * Set the globals from our tunables. This is needed because ACPI-CA 473 * uses UINT8 for some values and we have no tunable_byte. 474 */ 475 AcpiGbl_EnableInterpreterSlack = acpi_interpreter_slack ? TRUE : FALSE; 476 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE; 477 AcpiGbl_UseDefaultRegisterWidths = acpi_ignore_reg_width ? TRUE : FALSE; 478 479 #ifndef ACPI_DEBUG 480 /* 481 * Disable all debugging layers and levels. 482 */ 483 AcpiDbgLayer = 0; 484 AcpiDbgLevel = 0; 485 #endif 486 487 /* Start up the ACPI CA subsystem. */ 488 status = AcpiInitializeSubsystem(); 489 if (ACPI_FAILURE(status)) { 490 device_printf(dev, "Could not initialize Subsystem: %s\n", 491 AcpiFormatException(status)); 492 goto out; 493 } 494 495 /* Override OS interfaces if the user requested. */ 496 acpi_reset_interfaces(dev); 497 498 /* Load ACPI name space. */ 499 status = AcpiLoadTables(); 500 if (ACPI_FAILURE(status)) { 501 device_printf(dev, "Could not load Namespace: %s\n", 502 AcpiFormatException(status)); 503 goto out; 504 } 505 506 #if defined(__i386__) || defined(__amd64__) 507 /* Handle MCFG table if present. */ 508 acpi_enable_pcie(); 509 #endif 510 511 /* 512 * Note that some systems (specifically, those with namespace evaluation 513 * issues that require the avoidance of parts of the namespace) must 514 * avoid running _INI and _STA on everything, as well as dodging the final 515 * object init pass. 516 * 517 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 518 * 519 * XXX We should arrange for the object init pass after we have attached 520 * all our child devices, but on many systems it works here. 521 */ 522 flags = 0; 523 if (testenv("debug.acpi.avoid")) 524 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 525 526 /* Bring the hardware and basic handlers online. */ 527 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 528 device_printf(dev, "Could not enable ACPI: %s\n", 529 AcpiFormatException(status)); 530 goto out; 531 } 532 533 /* 534 * Call the ECDT probe function to provide EC functionality before 535 * the namespace has been evaluated. 536 * 537 * XXX This happens before the sysresource devices have been probed and 538 * attached so its resources come from nexus0. In practice, this isn't 539 * a problem but should be addressed eventually. 540 */ 541 acpi_ec_ecdt_probe(dev); 542 543 /* Bring device objects and regions online. */ 544 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 545 device_printf(dev, "Could not initialize ACPI objects: %s\n", 546 AcpiFormatException(status)); 547 goto out; 548 } 549 550 /* 551 * Setup our sysctl tree. 552 * 553 * XXX: This doesn't check to make sure that none of these fail. 554 */ 555 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 556 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 557 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 558 device_get_name(dev), CTLFLAG_RD, 0, ""); 559 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 560 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 561 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 562 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 563 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 564 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 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 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 569 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 570 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 571 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 572 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 573 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 574 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 575 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 576 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 577 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 578 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0, 579 "sleep delay in seconds"); 580 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 581 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode"); 582 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 583 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode"); 584 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 585 OID_AUTO, "disable_on_reboot", CTLFLAG_RW, 586 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system"); 587 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 588 OID_AUTO, "handle_reboot", CTLFLAG_RW, 589 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot"); 590 591 /* 592 * Default to 1 second before sleeping to give some machines time to 593 * stabilize. 594 */ 595 sc->acpi_sleep_delay = 1; 596 if (bootverbose) 597 sc->acpi_verbose = 1; 598 if ((env = kern_getenv("hw.acpi.verbose")) != NULL) { 599 if (strcmp(env, "0") != 0) 600 sc->acpi_verbose = 1; 601 freeenv(env); 602 } 603 604 /* Only enable reboot by default if the FADT says it is available. */ 605 if (AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) 606 sc->acpi_handle_reboot = 1; 607 608 /* Only enable S4BIOS by default if the FACS says it is available. */ 609 if (AcpiGbl_FACS->Flags & ACPI_FACS_S4_BIOS_PRESENT) 610 sc->acpi_s4bios = 1; 611 612 /* Probe all supported sleep states. */ 613 acpi_sleep_states[ACPI_STATE_S0] = TRUE; 614 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++) 615 if (ACPI_SUCCESS(AcpiEvaluateObject(ACPI_ROOT_OBJECT, 616 __DECONST(char *, AcpiGbl_SleepStateNames[state]), NULL, NULL)) && 617 ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) 618 acpi_sleep_states[state] = TRUE; 619 620 /* 621 * Dispatch the default sleep state to devices. The lid switch is set 622 * to UNKNOWN by default to avoid surprising users. 623 */ 624 sc->acpi_power_button_sx = acpi_sleep_states[ACPI_STATE_S5] ? 625 ACPI_STATE_S5 : ACPI_STATE_UNKNOWN; 626 sc->acpi_lid_switch_sx = ACPI_STATE_UNKNOWN; 627 sc->acpi_standby_sx = acpi_sleep_states[ACPI_STATE_S1] ? 628 ACPI_STATE_S1 : ACPI_STATE_UNKNOWN; 629 sc->acpi_suspend_sx = acpi_sleep_states[ACPI_STATE_S3] ? 630 ACPI_STATE_S3 : ACPI_STATE_UNKNOWN; 631 632 /* Pick the first valid sleep state for the sleep button default. */ 633 sc->acpi_sleep_button_sx = ACPI_STATE_UNKNOWN; 634 for (state = ACPI_STATE_S1; state <= ACPI_STATE_S4; state++) 635 if (acpi_sleep_states[state]) { 636 sc->acpi_sleep_button_sx = state; 637 break; 638 } 639 640 acpi_enable_fixed_events(sc); 641 642 /* 643 * Scan the namespace and attach/initialise children. 644 */ 645 646 /* Register our shutdown handler. */ 647 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 648 SHUTDOWN_PRI_LAST); 649 650 /* 651 * Register our acpi event handlers. 652 * XXX should be configurable eg. via userland policy manager. 653 */ 654 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 655 sc, ACPI_EVENT_PRI_LAST); 656 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 657 sc, ACPI_EVENT_PRI_LAST); 658 659 /* Flag our initial states. */ 660 sc->acpi_enabled = TRUE; 661 sc->acpi_sstate = ACPI_STATE_S0; 662 sc->acpi_sleep_disabled = TRUE; 663 664 /* Create the control device */ 665 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644, 666 "acpi"); 667 sc->acpi_dev_t->si_drv1 = sc; 668 669 if ((error = acpi_machdep_init(dev))) 670 goto out; 671 672 /* Register ACPI again to pass the correct argument of pm_func. */ 673 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 674 675 if (!acpi_disabled("bus")) { 676 EVENTHANDLER_REGISTER(dev_lookup, acpi_lookup, NULL, 1000); 677 acpi_probe_children(dev); 678 } 679 680 /* Update all GPEs and enable runtime GPEs. */ 681 status = AcpiUpdateAllGpes(); 682 if (ACPI_FAILURE(status)) 683 device_printf(dev, "Could not update all GPEs: %s\n", 684 AcpiFormatException(status)); 685 686 /* Allow sleep request after a while. */ 687 callout_init_mtx(&acpi_sleep_timer, &acpi_mutex, 0); 688 callout_reset(&acpi_sleep_timer, hz * ACPI_MINIMUM_AWAKETIME, 689 acpi_sleep_enable, sc); 690 691 error = 0; 692 693 out: 694 return_VALUE (error); 695 } 696 697 static void 698 acpi_set_power_children(device_t dev, int state) 699 { 700 device_t child; 701 device_t *devlist; 702 int dstate, i, numdevs; 703 704 if (device_get_children(dev, &devlist, &numdevs) != 0) 705 return; 706 707 /* 708 * Retrieve and set D-state for the sleep state if _SxD is present. 709 * Skip children who aren't attached since they are handled separately. 710 */ 711 for (i = 0; i < numdevs; i++) { 712 child = devlist[i]; 713 dstate = state; 714 if (device_is_attached(child) && 715 acpi_device_pwr_for_sleep(dev, child, &dstate) == 0) 716 acpi_set_powerstate(child, dstate); 717 } 718 free(devlist, M_TEMP); 719 } 720 721 static int 722 acpi_suspend(device_t dev) 723 { 724 int error; 725 726 GIANT_REQUIRED; 727 728 error = bus_generic_suspend(dev); 729 if (error == 0) 730 acpi_set_power_children(dev, ACPI_STATE_D3); 731 732 return (error); 733 } 734 735 static int 736 acpi_resume(device_t dev) 737 { 738 739 GIANT_REQUIRED; 740 741 acpi_set_power_children(dev, ACPI_STATE_D0); 742 743 return (bus_generic_resume(dev)); 744 } 745 746 static int 747 acpi_shutdown(device_t dev) 748 { 749 750 GIANT_REQUIRED; 751 752 /* Allow children to shutdown first. */ 753 bus_generic_shutdown(dev); 754 755 /* 756 * Enable any GPEs that are able to power-on the system (i.e., RTC). 757 * Also, disable any that are not valid for this state (most). 758 */ 759 acpi_wake_prep_walk(ACPI_STATE_S5); 760 761 return (0); 762 } 763 764 /* 765 * Handle a new device being added 766 */ 767 static device_t 768 acpi_add_child(device_t bus, u_int order, const char *name, int unit) 769 { 770 struct acpi_device *ad; 771 device_t child; 772 773 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 774 return (NULL); 775 776 resource_list_init(&ad->ad_rl); 777 778 child = device_add_child_ordered(bus, order, name, unit); 779 if (child != NULL) 780 device_set_ivars(child, ad); 781 else 782 free(ad, M_ACPIDEV); 783 return (child); 784 } 785 786 static int 787 acpi_print_child(device_t bus, device_t child) 788 { 789 struct acpi_device *adev = device_get_ivars(child); 790 struct resource_list *rl = &adev->ad_rl; 791 int retval = 0; 792 793 retval += bus_print_child_header(bus, child); 794 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 795 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 796 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 797 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 798 if (device_get_flags(child)) 799 retval += printf(" flags %#x", device_get_flags(child)); 800 retval += bus_print_child_domain(bus, child); 801 retval += bus_print_child_footer(bus, child); 802 803 return (retval); 804 } 805 806 /* 807 * If this device is an ACPI child but no one claimed it, attempt 808 * to power it off. We'll power it back up when a driver is added. 809 * 810 * XXX Disabled for now since many necessary devices (like fdc and 811 * ATA) don't claim the devices we created for them but still expect 812 * them to be powered up. 813 */ 814 static void 815 acpi_probe_nomatch(device_t bus, device_t child) 816 { 817 #ifdef ACPI_ENABLE_POWERDOWN_NODRIVER 818 acpi_set_powerstate(child, ACPI_STATE_D3); 819 #endif 820 } 821 822 /* 823 * If a new driver has a chance to probe a child, first power it up. 824 * 825 * XXX Disabled for now (see acpi_probe_nomatch for details). 826 */ 827 static void 828 acpi_driver_added(device_t dev, driver_t *driver) 829 { 830 device_t child, *devlist; 831 int i, numdevs; 832 833 DEVICE_IDENTIFY(driver, dev); 834 if (device_get_children(dev, &devlist, &numdevs)) 835 return; 836 for (i = 0; i < numdevs; i++) { 837 child = devlist[i]; 838 if (device_get_state(child) == DS_NOTPRESENT) { 839 #ifdef ACPI_ENABLE_POWERDOWN_NODRIVER 840 acpi_set_powerstate(child, ACPI_STATE_D0); 841 if (device_probe_and_attach(child) != 0) 842 acpi_set_powerstate(child, ACPI_STATE_D3); 843 #else 844 device_probe_and_attach(child); 845 #endif 846 } 847 } 848 free(devlist, M_TEMP); 849 } 850 851 /* Location hint for devctl(8) */ 852 static int 853 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf, 854 size_t buflen) 855 { 856 struct acpi_device *dinfo = device_get_ivars(child); 857 char buf2[32]; 858 int pxm; 859 860 if (dinfo->ad_handle) { 861 snprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle)); 862 if (ACPI_SUCCESS(acpi_GetInteger(dinfo->ad_handle, "_PXM", &pxm))) { 863 snprintf(buf2, 32, " _PXM=%d", pxm); 864 strlcat(buf, buf2, buflen); 865 } 866 } else { 867 snprintf(buf, buflen, "unknown"); 868 } 869 return (0); 870 } 871 872 /* PnP information for devctl(8) */ 873 static int 874 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 875 size_t buflen) 876 { 877 struct acpi_device *dinfo = device_get_ivars(child); 878 ACPI_DEVICE_INFO *adinfo; 879 880 if (ACPI_FAILURE(AcpiGetObjectInfo(dinfo->ad_handle, &adinfo))) { 881 snprintf(buf, buflen, "unknown"); 882 return (0); 883 } 884 885 snprintf(buf, buflen, "_HID=%s _UID=%lu", 886 (adinfo->Valid & ACPI_VALID_HID) ? 887 adinfo->HardwareId.String : "none", 888 (adinfo->Valid & ACPI_VALID_UID) ? 889 strtoul(adinfo->UniqueId.String, NULL, 10) : 0UL); 890 AcpiOsFree(adinfo); 891 892 return (0); 893 } 894 895 /* 896 * Handle per-device ivars 897 */ 898 static int 899 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 900 { 901 struct acpi_device *ad; 902 903 if ((ad = device_get_ivars(child)) == NULL) { 904 device_printf(child, "device has no ivars\n"); 905 return (ENOENT); 906 } 907 908 /* ACPI and ISA compatibility ivars */ 909 switch(index) { 910 case ACPI_IVAR_HANDLE: 911 *(ACPI_HANDLE *)result = ad->ad_handle; 912 break; 913 case ACPI_IVAR_PRIVATE: 914 *(void **)result = ad->ad_private; 915 break; 916 case ACPI_IVAR_FLAGS: 917 *(int *)result = ad->ad_flags; 918 break; 919 case ISA_IVAR_VENDORID: 920 case ISA_IVAR_SERIAL: 921 case ISA_IVAR_COMPATID: 922 *(int *)result = -1; 923 break; 924 case ISA_IVAR_LOGICALID: 925 *(int *)result = acpi_isa_get_logicalid(child); 926 break; 927 default: 928 return (ENOENT); 929 } 930 931 return (0); 932 } 933 934 static int 935 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 936 { 937 struct acpi_device *ad; 938 939 if ((ad = device_get_ivars(child)) == NULL) { 940 device_printf(child, "device has no ivars\n"); 941 return (ENOENT); 942 } 943 944 switch(index) { 945 case ACPI_IVAR_HANDLE: 946 ad->ad_handle = (ACPI_HANDLE)value; 947 break; 948 case ACPI_IVAR_PRIVATE: 949 ad->ad_private = (void *)value; 950 break; 951 case ACPI_IVAR_FLAGS: 952 ad->ad_flags = (int)value; 953 break; 954 default: 955 panic("bad ivar write request (%d)", index); 956 return (ENOENT); 957 } 958 959 return (0); 960 } 961 962 /* 963 * Handle child resource allocation/removal 964 */ 965 static struct resource_list * 966 acpi_get_rlist(device_t dev, device_t child) 967 { 968 struct acpi_device *ad; 969 970 ad = device_get_ivars(child); 971 return (&ad->ad_rl); 972 } 973 974 static int 975 acpi_match_resource_hint(device_t dev, int type, long value) 976 { 977 struct acpi_device *ad = device_get_ivars(dev); 978 struct resource_list *rl = &ad->ad_rl; 979 struct resource_list_entry *rle; 980 981 STAILQ_FOREACH(rle, rl, link) { 982 if (rle->type != type) 983 continue; 984 if (rle->start <= value && rle->end >= value) 985 return (1); 986 } 987 return (0); 988 } 989 990 /* 991 * Wire device unit numbers based on resource matches in hints. 992 */ 993 static void 994 acpi_hint_device_unit(device_t acdev, device_t child, const char *name, 995 int *unitp) 996 { 997 const char *s; 998 long value; 999 int line, matches, unit; 1000 1001 /* 1002 * Iterate over all the hints for the devices with the specified 1003 * name to see if one's resources are a subset of this device. 1004 */ 1005 line = 0; 1006 for (;;) { 1007 if (resource_find_dev(&line, name, &unit, "at", NULL) != 0) 1008 break; 1009 1010 /* Must have an "at" for acpi or isa. */ 1011 resource_string_value(name, unit, "at", &s); 1012 if (!(strcmp(s, "acpi0") == 0 || strcmp(s, "acpi") == 0 || 1013 strcmp(s, "isa0") == 0 || strcmp(s, "isa") == 0)) 1014 continue; 1015 1016 /* 1017 * Check for matching resources. We must have at least one match. 1018 * Since I/O and memory resources cannot be shared, if we get a 1019 * match on either of those, ignore any mismatches in IRQs or DRQs. 1020 * 1021 * XXX: We may want to revisit this to be more lenient and wire 1022 * as long as it gets one match. 1023 */ 1024 matches = 0; 1025 if (resource_long_value(name, unit, "port", &value) == 0) { 1026 /* 1027 * Floppy drive controllers are notorious for having a 1028 * wide variety of resources not all of which include the 1029 * first port that is specified by the hint (typically 1030 * 0x3f0) (see the comment above fdc_isa_alloc_resources() 1031 * in fdc_isa.c). However, they do all seem to include 1032 * port + 2 (e.g. 0x3f2) so for a floppy device, look for 1033 * 'value + 2' in the port resources instead of the hint 1034 * value. 1035 */ 1036 if (strcmp(name, "fdc") == 0) 1037 value += 2; 1038 if (acpi_match_resource_hint(child, SYS_RES_IOPORT, value)) 1039 matches++; 1040 else 1041 continue; 1042 } 1043 if (resource_long_value(name, unit, "maddr", &value) == 0) { 1044 if (acpi_match_resource_hint(child, SYS_RES_MEMORY, value)) 1045 matches++; 1046 else 1047 continue; 1048 } 1049 if (matches > 0) 1050 goto matched; 1051 if (resource_long_value(name, unit, "irq", &value) == 0) { 1052 if (acpi_match_resource_hint(child, SYS_RES_IRQ, value)) 1053 matches++; 1054 else 1055 continue; 1056 } 1057 if (resource_long_value(name, unit, "drq", &value) == 0) { 1058 if (acpi_match_resource_hint(child, SYS_RES_DRQ, value)) 1059 matches++; 1060 else 1061 continue; 1062 } 1063 1064 matched: 1065 if (matches > 0) { 1066 /* We have a winner! */ 1067 *unitp = unit; 1068 break; 1069 } 1070 } 1071 } 1072 1073 /* 1074 * Fech the NUMA domain for the given device. 1075 * 1076 * If a device has a _PXM method, map that to a NUMA domain. 1077 * 1078 * If none is found, then it'll call the parent method. 1079 * If there's no domain, return ENOENT. 1080 */ 1081 int 1082 acpi_get_domain(device_t dev, device_t child, int *domain) 1083 { 1084 #if MAXMEMDOM > 1 1085 ACPI_HANDLE h; 1086 int d, pxm; 1087 1088 h = acpi_get_handle(child); 1089 if ((h != NULL) && 1090 ACPI_SUCCESS(acpi_GetInteger(h, "_PXM", &pxm))) { 1091 d = acpi_map_pxm_to_vm_domainid(pxm); 1092 if (d < 0) 1093 return (ENOENT); 1094 *domain = d; 1095 return (0); 1096 } 1097 #endif 1098 /* No _PXM node; go up a level */ 1099 return (bus_generic_get_domain(dev, child, domain)); 1100 } 1101 1102 /* 1103 * Pre-allocate/manage all memory and IO resources. Since rman can't handle 1104 * duplicates, we merge any in the sysresource attach routine. 1105 */ 1106 static int 1107 acpi_sysres_alloc(device_t dev) 1108 { 1109 struct resource *res; 1110 struct resource_list *rl; 1111 struct resource_list_entry *rle; 1112 struct rman *rm; 1113 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 1114 device_t *children; 1115 int child_count, i; 1116 1117 /* 1118 * Probe/attach any sysresource devices. This would be unnecessary if we 1119 * had multi-pass probe/attach. 1120 */ 1121 if (device_get_children(dev, &children, &child_count) != 0) 1122 return (ENXIO); 1123 for (i = 0; i < child_count; i++) { 1124 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 1125 device_probe_and_attach(children[i]); 1126 } 1127 free(children, M_TEMP); 1128 1129 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev); 1130 STAILQ_FOREACH(rle, rl, link) { 1131 if (rle->res != NULL) { 1132 device_printf(dev, "duplicate resource for %lx\n", rle->start); 1133 continue; 1134 } 1135 1136 /* Only memory and IO resources are valid here. */ 1137 switch (rle->type) { 1138 case SYS_RES_IOPORT: 1139 rm = &acpi_rman_io; 1140 break; 1141 case SYS_RES_MEMORY: 1142 rm = &acpi_rman_mem; 1143 break; 1144 default: 1145 continue; 1146 } 1147 1148 /* Pre-allocate resource and add to our rman pool. */ 1149 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type, 1150 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 0); 1151 if (res != NULL) { 1152 rman_manage_region(rm, rman_get_start(res), rman_get_end(res)); 1153 rle->res = res; 1154 } else 1155 device_printf(dev, "reservation of %lx, %lx (%d) failed\n", 1156 rle->start, rle->count, rle->type); 1157 } 1158 return (0); 1159 } 1160 1161 static char *pcilink_ids[] = { "PNP0C0F", NULL }; 1162 static char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 1163 1164 /* 1165 * Reserve declared resources for devices found during attach once system 1166 * resources have been allocated. 1167 */ 1168 static void 1169 acpi_reserve_resources(device_t dev) 1170 { 1171 struct resource_list_entry *rle; 1172 struct resource_list *rl; 1173 struct acpi_device *ad; 1174 struct acpi_softc *sc; 1175 device_t *children; 1176 int child_count, i; 1177 1178 sc = device_get_softc(dev); 1179 if (device_get_children(dev, &children, &child_count) != 0) 1180 return; 1181 for (i = 0; i < child_count; i++) { 1182 ad = device_get_ivars(children[i]); 1183 rl = &ad->ad_rl; 1184 1185 /* Don't reserve system resources. */ 1186 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 1187 continue; 1188 1189 STAILQ_FOREACH(rle, rl, link) { 1190 /* 1191 * Don't reserve IRQ resources. There are many sticky things 1192 * to get right otherwise (e.g. IRQs for psm, atkbd, and HPET 1193 * when using legacy routing). 1194 */ 1195 if (rle->type == SYS_RES_IRQ) 1196 continue; 1197 1198 /* 1199 * Don't reserve the resource if it is already allocated. 1200 * The acpi_ec(4) driver can allocate its resources early 1201 * if ECDT is present. 1202 */ 1203 if (rle->res != NULL) 1204 continue; 1205 1206 /* 1207 * Try to reserve the resource from our parent. If this 1208 * fails because the resource is a system resource, just 1209 * let it be. The resource range is already reserved so 1210 * that other devices will not use it. If the driver 1211 * needs to allocate the resource, then 1212 * acpi_alloc_resource() will sub-alloc from the system 1213 * resource. 1214 */ 1215 resource_list_reserve(rl, dev, children[i], rle->type, &rle->rid, 1216 rle->start, rle->end, rle->count, 0); 1217 } 1218 } 1219 free(children, M_TEMP); 1220 sc->acpi_resources_reserved = 1; 1221 } 1222 1223 static int 1224 acpi_set_resource(device_t dev, device_t child, int type, int rid, 1225 u_long start, u_long count) 1226 { 1227 struct acpi_softc *sc = device_get_softc(dev); 1228 struct acpi_device *ad = device_get_ivars(child); 1229 struct resource_list *rl = &ad->ad_rl; 1230 ACPI_DEVICE_INFO *devinfo; 1231 u_long end; 1232 1233 /* Ignore IRQ resources for PCI link devices. */ 1234 if (type == SYS_RES_IRQ && ACPI_ID_PROBE(dev, child, pcilink_ids) != NULL) 1235 return (0); 1236 1237 /* 1238 * Ignore most resources for PCI root bridges. Some BIOSes 1239 * incorrectly enumerate the memory ranges they decode as plain 1240 * memory resources instead of as ResourceProducer ranges. Other 1241 * BIOSes incorrectly list system resource entries for I/O ranges 1242 * under the PCI bridge. Do allow the one known-correct case on 1243 * x86 of a PCI bridge claiming the I/O ports used for PCI config 1244 * access. 1245 */ 1246 if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) { 1247 if (ACPI_SUCCESS(AcpiGetObjectInfo(ad->ad_handle, &devinfo))) { 1248 if ((devinfo->Flags & ACPI_PCI_ROOT_BRIDGE) != 0) { 1249 #if defined(__i386__) || defined(__amd64__) 1250 if (!(type == SYS_RES_IOPORT && start == CONF1_ADDR_PORT)) 1251 #endif 1252 { 1253 AcpiOsFree(devinfo); 1254 return (0); 1255 } 1256 } 1257 AcpiOsFree(devinfo); 1258 } 1259 } 1260 1261 /* If the resource is already allocated, fail. */ 1262 if (resource_list_busy(rl, type, rid)) 1263 return (EBUSY); 1264 1265 /* If the resource is already reserved, release it. */ 1266 if (resource_list_reserved(rl, type, rid)) 1267 resource_list_unreserve(rl, dev, child, type, rid); 1268 1269 /* Add the resource. */ 1270 end = (start + count - 1); 1271 resource_list_add(rl, type, rid, start, end, count); 1272 1273 /* Don't reserve resources until the system resources are allocated. */ 1274 if (!sc->acpi_resources_reserved) 1275 return (0); 1276 1277 /* Don't reserve system resources. */ 1278 if (ACPI_ID_PROBE(dev, child, sysres_ids) != NULL) 1279 return (0); 1280 1281 /* 1282 * Don't reserve IRQ resources. There are many sticky things to 1283 * get right otherwise (e.g. IRQs for psm, atkbd, and HPET when 1284 * using legacy routing). 1285 */ 1286 if (type == SYS_RES_IRQ) 1287 return (0); 1288 1289 /* 1290 * Reserve the resource. 1291 * 1292 * XXX: Ignores failure for now. Failure here is probably a 1293 * BIOS/firmware bug? 1294 */ 1295 resource_list_reserve(rl, dev, child, type, &rid, start, end, count, 0); 1296 return (0); 1297 } 1298 1299 static struct resource * 1300 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 1301 u_long start, u_long end, u_long count, u_int flags) 1302 { 1303 ACPI_RESOURCE ares; 1304 struct acpi_device *ad; 1305 struct resource_list_entry *rle; 1306 struct resource_list *rl; 1307 struct resource *res; 1308 int isdefault = (start == 0UL && end == ~0UL); 1309 1310 /* 1311 * First attempt at allocating the resource. For direct children, 1312 * use resource_list_alloc() to handle reserved resources. For 1313 * other devices, pass the request up to our parent. 1314 */ 1315 if (bus == device_get_parent(child)) { 1316 ad = device_get_ivars(child); 1317 rl = &ad->ad_rl; 1318 1319 /* 1320 * Simulate the behavior of the ISA bus for direct children 1321 * devices. That is, if a non-default range is specified for 1322 * a resource that doesn't exist, use bus_set_resource() to 1323 * add the resource before allocating it. Note that these 1324 * resources will not be reserved. 1325 */ 1326 if (!isdefault && resource_list_find(rl, type, *rid) == NULL) 1327 resource_list_add(rl, type, *rid, start, end, count); 1328 res = resource_list_alloc(rl, bus, child, type, rid, start, end, count, 1329 flags); 1330 if (res != NULL && type == SYS_RES_IRQ) { 1331 /* 1332 * Since bus_config_intr() takes immediate effect, we cannot 1333 * configure the interrupt associated with a device when we 1334 * parse the resources but have to defer it until a driver 1335 * actually allocates the interrupt via bus_alloc_resource(). 1336 * 1337 * XXX: Should we handle the lookup failing? 1338 */ 1339 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares))) 1340 acpi_config_intr(child, &ares); 1341 } 1342 1343 /* 1344 * If this is an allocation of the "default" range for a given 1345 * RID, fetch the exact bounds for this resource from the 1346 * resource list entry to try to allocate the range from the 1347 * system resource regions. 1348 */ 1349 if (res == NULL && isdefault) { 1350 rle = resource_list_find(rl, type, *rid); 1351 if (rle != NULL) { 1352 start = rle->start; 1353 end = rle->end; 1354 count = rle->count; 1355 } 1356 } 1357 } else 1358 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid, 1359 start, end, count, flags); 1360 1361 /* 1362 * If the first attempt failed and this is an allocation of a 1363 * specific range, try to satisfy the request via a suballocation 1364 * from our system resource regions. 1365 */ 1366 if (res == NULL && start + count - 1 == end) 1367 res = acpi_alloc_sysres(child, type, rid, start, end, count, flags); 1368 return (res); 1369 } 1370 1371 /* 1372 * Attempt to allocate a specific resource range from the system 1373 * resource ranges. Note that we only handle memory and I/O port 1374 * system resources. 1375 */ 1376 struct resource * 1377 acpi_alloc_sysres(device_t child, int type, int *rid, u_long start, u_long end, 1378 u_long count, u_int flags) 1379 { 1380 struct rman *rm; 1381 struct resource *res; 1382 1383 switch (type) { 1384 case SYS_RES_IOPORT: 1385 rm = &acpi_rman_io; 1386 break; 1387 case SYS_RES_MEMORY: 1388 rm = &acpi_rman_mem; 1389 break; 1390 default: 1391 return (NULL); 1392 } 1393 1394 KASSERT(start + count - 1 == end, ("wildcard resource range")); 1395 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE, 1396 child); 1397 if (res == NULL) 1398 return (NULL); 1399 1400 rman_set_rid(res, *rid); 1401 1402 /* If requested, activate the resource using the parent's method. */ 1403 if (flags & RF_ACTIVE) 1404 if (bus_activate_resource(child, type, *rid, res) != 0) { 1405 rman_release_resource(res); 1406 return (NULL); 1407 } 1408 1409 return (res); 1410 } 1411 1412 static int 1413 acpi_is_resource_managed(int type, struct resource *r) 1414 { 1415 1416 /* We only handle memory and IO resources through rman. */ 1417 switch (type) { 1418 case SYS_RES_IOPORT: 1419 return (rman_is_region_manager(r, &acpi_rman_io)); 1420 case SYS_RES_MEMORY: 1421 return (rman_is_region_manager(r, &acpi_rman_mem)); 1422 } 1423 return (0); 1424 } 1425 1426 static int 1427 acpi_adjust_resource(device_t bus, device_t child, int type, struct resource *r, 1428 u_long start, u_long end) 1429 { 1430 1431 if (acpi_is_resource_managed(type, r)) 1432 return (rman_adjust_resource(r, start, end)); 1433 return (bus_generic_adjust_resource(bus, child, type, r, start, end)); 1434 } 1435 1436 static int 1437 acpi_release_resource(device_t bus, device_t child, int type, int rid, 1438 struct resource *r) 1439 { 1440 int ret; 1441 1442 /* 1443 * If this resource belongs to one of our internal managers, 1444 * deactivate it and release it to the local pool. 1445 */ 1446 if (acpi_is_resource_managed(type, r)) { 1447 if (rman_get_flags(r) & RF_ACTIVE) { 1448 ret = bus_deactivate_resource(child, type, rid, r); 1449 if (ret != 0) 1450 return (ret); 1451 } 1452 return (rman_release_resource(r)); 1453 } 1454 1455 return (bus_generic_rl_release_resource(bus, child, type, rid, r)); 1456 } 1457 1458 static void 1459 acpi_delete_resource(device_t bus, device_t child, int type, int rid) 1460 { 1461 struct resource_list *rl; 1462 1463 rl = acpi_get_rlist(bus, child); 1464 if (resource_list_busy(rl, type, rid)) { 1465 device_printf(bus, "delete_resource: Resource still owned by child" 1466 " (type=%d, rid=%d)\n", type, rid); 1467 return; 1468 } 1469 resource_list_unreserve(rl, bus, child, type, rid); 1470 resource_list_delete(rl, type, rid); 1471 } 1472 1473 /* Allocate an IO port or memory resource, given its GAS. */ 1474 int 1475 acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas, 1476 struct resource **res, u_int flags) 1477 { 1478 int error, res_type; 1479 1480 error = ENOMEM; 1481 if (type == NULL || rid == NULL || gas == NULL || res == NULL) 1482 return (EINVAL); 1483 1484 /* We only support memory and IO spaces. */ 1485 switch (gas->SpaceId) { 1486 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1487 res_type = SYS_RES_MEMORY; 1488 break; 1489 case ACPI_ADR_SPACE_SYSTEM_IO: 1490 res_type = SYS_RES_IOPORT; 1491 break; 1492 default: 1493 return (EOPNOTSUPP); 1494 } 1495 1496 /* 1497 * If the register width is less than 8, assume the BIOS author means 1498 * it is a bit field and just allocate a byte. 1499 */ 1500 if (gas->BitWidth && gas->BitWidth < 8) 1501 gas->BitWidth = 8; 1502 1503 /* Validate the address after we're sure we support the space. */ 1504 if (gas->Address == 0 || gas->BitWidth == 0) 1505 return (EINVAL); 1506 1507 bus_set_resource(dev, res_type, *rid, gas->Address, 1508 gas->BitWidth / 8); 1509 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags); 1510 if (*res != NULL) { 1511 *type = res_type; 1512 error = 0; 1513 } else 1514 bus_delete_resource(dev, res_type, *rid); 1515 1516 return (error); 1517 } 1518 1519 /* Probe _HID and _CID for compatible ISA PNP ids. */ 1520 static uint32_t 1521 acpi_isa_get_logicalid(device_t dev) 1522 { 1523 ACPI_DEVICE_INFO *devinfo; 1524 ACPI_HANDLE h; 1525 uint32_t pnpid; 1526 1527 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1528 1529 /* Fetch and validate the HID. */ 1530 if ((h = acpi_get_handle(dev)) == NULL || 1531 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1532 return_VALUE (0); 1533 1534 pnpid = (devinfo->Valid & ACPI_VALID_HID) != 0 && 1535 devinfo->HardwareId.Length >= ACPI_EISAID_STRING_SIZE ? 1536 PNP_EISAID(devinfo->HardwareId.String) : 0; 1537 AcpiOsFree(devinfo); 1538 1539 return_VALUE (pnpid); 1540 } 1541 1542 static int 1543 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 1544 { 1545 ACPI_DEVICE_INFO *devinfo; 1546 ACPI_PNP_DEVICE_ID *ids; 1547 ACPI_HANDLE h; 1548 uint32_t *pnpid; 1549 int i, valid; 1550 1551 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1552 1553 pnpid = cids; 1554 1555 /* Fetch and validate the CID */ 1556 if ((h = acpi_get_handle(dev)) == NULL || 1557 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1558 return_VALUE (0); 1559 1560 if ((devinfo->Valid & ACPI_VALID_CID) == 0) { 1561 AcpiOsFree(devinfo); 1562 return_VALUE (0); 1563 } 1564 1565 if (devinfo->CompatibleIdList.Count < count) 1566 count = devinfo->CompatibleIdList.Count; 1567 ids = devinfo->CompatibleIdList.Ids; 1568 for (i = 0, valid = 0; i < count; i++) 1569 if (ids[i].Length >= ACPI_EISAID_STRING_SIZE && 1570 strncmp(ids[i].String, "PNP", 3) == 0) { 1571 *pnpid++ = PNP_EISAID(ids[i].String); 1572 valid++; 1573 } 1574 AcpiOsFree(devinfo); 1575 1576 return_VALUE (valid); 1577 } 1578 1579 static char * 1580 acpi_device_id_probe(device_t bus, device_t dev, char **ids) 1581 { 1582 ACPI_HANDLE h; 1583 ACPI_OBJECT_TYPE t; 1584 int i; 1585 1586 h = acpi_get_handle(dev); 1587 if (ids == NULL || h == NULL) 1588 return (NULL); 1589 t = acpi_get_type(dev); 1590 if (t != ACPI_TYPE_DEVICE && t != ACPI_TYPE_PROCESSOR) 1591 return (NULL); 1592 1593 /* Try to match one of the array of IDs with a HID or CID. */ 1594 for (i = 0; ids[i] != NULL; i++) { 1595 if (acpi_MatchHid(h, ids[i])) 1596 return (ids[i]); 1597 } 1598 return (NULL); 1599 } 1600 1601 static ACPI_STATUS 1602 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname, 1603 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret) 1604 { 1605 ACPI_HANDLE h; 1606 1607 if (dev == NULL) 1608 h = ACPI_ROOT_OBJECT; 1609 else if ((h = acpi_get_handle(dev)) == NULL) 1610 return (AE_BAD_PARAMETER); 1611 return (AcpiEvaluateObject(h, pathname, parameters, ret)); 1612 } 1613 1614 int 1615 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate) 1616 { 1617 struct acpi_softc *sc; 1618 ACPI_HANDLE handle; 1619 ACPI_STATUS status; 1620 char sxd[8]; 1621 1622 handle = acpi_get_handle(dev); 1623 1624 /* 1625 * XXX If we find these devices, don't try to power them down. 1626 * The serial and IRDA ports on my T23 hang the system when 1627 * set to D3 and it appears that such legacy devices may 1628 * need special handling in their drivers. 1629 */ 1630 if (dstate == NULL || handle == NULL || 1631 acpi_MatchHid(handle, "PNP0500") || 1632 acpi_MatchHid(handle, "PNP0501") || 1633 acpi_MatchHid(handle, "PNP0502") || 1634 acpi_MatchHid(handle, "PNP0510") || 1635 acpi_MatchHid(handle, "PNP0511")) 1636 return (ENXIO); 1637 1638 /* 1639 * Override next state with the value from _SxD, if present. 1640 * Note illegal _S0D is evaluated because some systems expect this. 1641 */ 1642 sc = device_get_softc(bus); 1643 snprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate); 1644 status = acpi_GetInteger(handle, sxd, dstate); 1645 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { 1646 device_printf(dev, "failed to get %s on %s: %s\n", sxd, 1647 acpi_name(handle), AcpiFormatException(status)); 1648 return (ENXIO); 1649 } 1650 1651 return (0); 1652 } 1653 1654 /* Callback arg for our implementation of walking the namespace. */ 1655 struct acpi_device_scan_ctx { 1656 acpi_scan_cb_t user_fn; 1657 void *arg; 1658 ACPI_HANDLE parent; 1659 }; 1660 1661 static ACPI_STATUS 1662 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval) 1663 { 1664 struct acpi_device_scan_ctx *ctx; 1665 device_t dev, old_dev; 1666 ACPI_STATUS status; 1667 ACPI_OBJECT_TYPE type; 1668 1669 /* 1670 * Skip this device if we think we'll have trouble with it or it is 1671 * the parent where the scan began. 1672 */ 1673 ctx = (struct acpi_device_scan_ctx *)arg; 1674 if (acpi_avoid(h) || h == ctx->parent) 1675 return (AE_OK); 1676 1677 /* If this is not a valid device type (e.g., a method), skip it. */ 1678 if (ACPI_FAILURE(AcpiGetType(h, &type))) 1679 return (AE_OK); 1680 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR && 1681 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER) 1682 return (AE_OK); 1683 1684 /* 1685 * Call the user function with the current device. If it is unchanged 1686 * afterwards, return. Otherwise, we update the handle to the new dev. 1687 */ 1688 old_dev = acpi_get_device(h); 1689 dev = old_dev; 1690 status = ctx->user_fn(h, &dev, level, ctx->arg); 1691 if (ACPI_FAILURE(status) || old_dev == dev) 1692 return (status); 1693 1694 /* Remove the old child and its connection to the handle. */ 1695 if (old_dev != NULL) { 1696 device_delete_child(device_get_parent(old_dev), old_dev); 1697 AcpiDetachData(h, acpi_fake_objhandler); 1698 } 1699 1700 /* Recreate the handle association if the user created a device. */ 1701 if (dev != NULL) 1702 AcpiAttachData(h, acpi_fake_objhandler, dev); 1703 1704 return (AE_OK); 1705 } 1706 1707 static ACPI_STATUS 1708 acpi_device_scan_children(device_t bus, device_t dev, int max_depth, 1709 acpi_scan_cb_t user_fn, void *arg) 1710 { 1711 ACPI_HANDLE h; 1712 struct acpi_device_scan_ctx ctx; 1713 1714 if (acpi_disabled("children")) 1715 return (AE_OK); 1716 1717 if (dev == NULL) 1718 h = ACPI_ROOT_OBJECT; 1719 else if ((h = acpi_get_handle(dev)) == NULL) 1720 return (AE_BAD_PARAMETER); 1721 ctx.user_fn = user_fn; 1722 ctx.arg = arg; 1723 ctx.parent = h; 1724 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth, 1725 acpi_device_scan_cb, NULL, &ctx, NULL)); 1726 } 1727 1728 /* 1729 * Even though ACPI devices are not PCI, we use the PCI approach for setting 1730 * device power states since it's close enough to ACPI. 1731 */ 1732 static int 1733 acpi_set_powerstate(device_t child, int state) 1734 { 1735 ACPI_HANDLE h; 1736 ACPI_STATUS status; 1737 1738 h = acpi_get_handle(child); 1739 if (state < ACPI_STATE_D0 || state > ACPI_D_STATES_MAX) 1740 return (EINVAL); 1741 if (h == NULL) 1742 return (0); 1743 1744 /* Ignore errors if the power methods aren't present. */ 1745 status = acpi_pwr_switch_consumer(h, state); 1746 if (ACPI_SUCCESS(status)) { 1747 if (bootverbose) 1748 device_printf(child, "set ACPI power state D%d on %s\n", 1749 state, acpi_name(h)); 1750 } else if (status != AE_NOT_FOUND) 1751 device_printf(child, 1752 "failed to set ACPI power state D%d on %s: %s\n", state, 1753 acpi_name(h), AcpiFormatException(status)); 1754 1755 return (0); 1756 } 1757 1758 static int 1759 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 1760 { 1761 int result, cid_count, i; 1762 uint32_t lid, cids[8]; 1763 1764 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1765 1766 /* 1767 * ISA-style drivers attached to ACPI may persist and 1768 * probe manually if we return ENOENT. We never want 1769 * that to happen, so don't ever return it. 1770 */ 1771 result = ENXIO; 1772 1773 /* Scan the supplied IDs for a match */ 1774 lid = acpi_isa_get_logicalid(child); 1775 cid_count = acpi_isa_get_compatid(child, cids, 8); 1776 while (ids && ids->ip_id) { 1777 if (lid == ids->ip_id) { 1778 result = 0; 1779 goto out; 1780 } 1781 for (i = 0; i < cid_count; i++) { 1782 if (cids[i] == ids->ip_id) { 1783 result = 0; 1784 goto out; 1785 } 1786 } 1787 ids++; 1788 } 1789 1790 out: 1791 if (result == 0 && ids->ip_desc) 1792 device_set_desc(child, ids->ip_desc); 1793 1794 return_VALUE (result); 1795 } 1796 1797 #if defined(__i386__) || defined(__amd64__) 1798 /* 1799 * Look for a MCFG table. If it is present, use the settings for 1800 * domain (segment) 0 to setup PCI config space access via the memory 1801 * map. 1802 */ 1803 static void 1804 acpi_enable_pcie(void) 1805 { 1806 ACPI_TABLE_HEADER *hdr; 1807 ACPI_MCFG_ALLOCATION *alloc, *end; 1808 ACPI_STATUS status; 1809 1810 status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr); 1811 if (ACPI_FAILURE(status)) 1812 return; 1813 1814 end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length); 1815 alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1); 1816 while (alloc < end) { 1817 if (alloc->PciSegment == 0) { 1818 pcie_cfgregopen(alloc->Address, alloc->StartBusNumber, 1819 alloc->EndBusNumber); 1820 return; 1821 } 1822 alloc++; 1823 } 1824 } 1825 #endif 1826 1827 /* 1828 * Scan all of the ACPI namespace and attach child devices. 1829 * 1830 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and 1831 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec. 1832 * However, in violation of the spec, some systems place their PCI link 1833 * devices in \, so we have to walk the whole namespace. We check the 1834 * type of namespace nodes, so this should be ok. 1835 */ 1836 static void 1837 acpi_probe_children(device_t bus) 1838 { 1839 1840 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1841 1842 /* 1843 * Scan the namespace and insert placeholders for all the devices that 1844 * we find. We also probe/attach any early devices. 1845 * 1846 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1847 * we want to create nodes for all devices, not just those that are 1848 * currently present. (This assumes that we don't want to create/remove 1849 * devices as they appear, which might be smarter.) 1850 */ 1851 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1852 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, acpi_probe_child, 1853 NULL, bus, NULL); 1854 1855 /* Pre-allocate resources for our rman from any sysresource devices. */ 1856 acpi_sysres_alloc(bus); 1857 1858 /* Reserve resources already allocated to children. */ 1859 acpi_reserve_resources(bus); 1860 1861 /* Create any static children by calling device identify methods. */ 1862 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1863 bus_generic_probe(bus); 1864 1865 /* Probe/attach all children, created statically and from the namespace. */ 1866 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "acpi bus_generic_attach\n")); 1867 bus_generic_attach(bus); 1868 1869 /* Attach wake sysctls. */ 1870 acpi_wake_sysctl_walk(bus); 1871 1872 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1873 return_VOID; 1874 } 1875 1876 /* 1877 * Determine the probe order for a given device. 1878 */ 1879 static void 1880 acpi_probe_order(ACPI_HANDLE handle, int *order) 1881 { 1882 ACPI_OBJECT_TYPE type; 1883 1884 /* 1885 * 0. CPUs 1886 * 1. I/O port and memory system resource holders 1887 * 2. Clocks and timers (to handle early accesses) 1888 * 3. Embedded controllers (to handle early accesses) 1889 * 4. PCI Link Devices 1890 */ 1891 AcpiGetType(handle, &type); 1892 if (type == ACPI_TYPE_PROCESSOR) 1893 *order = 0; 1894 else if (acpi_MatchHid(handle, "PNP0C01") || 1895 acpi_MatchHid(handle, "PNP0C02")) 1896 *order = 1; 1897 else if (acpi_MatchHid(handle, "PNP0100") || 1898 acpi_MatchHid(handle, "PNP0103") || 1899 acpi_MatchHid(handle, "PNP0B00")) 1900 *order = 2; 1901 else if (acpi_MatchHid(handle, "PNP0C09")) 1902 *order = 3; 1903 else if (acpi_MatchHid(handle, "PNP0C0F")) 1904 *order = 4; 1905 } 1906 1907 /* 1908 * Evaluate a child device and determine whether we might attach a device to 1909 * it. 1910 */ 1911 static ACPI_STATUS 1912 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1913 { 1914 struct acpi_prw_data prw; 1915 ACPI_OBJECT_TYPE type; 1916 ACPI_HANDLE h; 1917 device_t bus, child; 1918 char *handle_str; 1919 int order; 1920 1921 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1922 1923 if (acpi_disabled("children")) 1924 return_ACPI_STATUS (AE_OK); 1925 1926 /* Skip this device if we think we'll have trouble with it. */ 1927 if (acpi_avoid(handle)) 1928 return_ACPI_STATUS (AE_OK); 1929 1930 bus = (device_t)context; 1931 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1932 handle_str = acpi_name(handle); 1933 switch (type) { 1934 case ACPI_TYPE_DEVICE: 1935 /* 1936 * Since we scan from \, be sure to skip system scope objects. 1937 * \_SB_ and \_TZ_ are defined in ACPICA as devices to work around 1938 * BIOS bugs. For example, \_SB_ is to allow \_SB_._INI to be run 1939 * during the intialization and \_TZ_ is to support Notify() on it. 1940 */ 1941 if (strcmp(handle_str, "\\_SB_") == 0 || 1942 strcmp(handle_str, "\\_TZ_") == 0) 1943 break; 1944 if (acpi_parse_prw(handle, &prw) == 0) 1945 AcpiSetupGpeForWake(handle, prw.gpe_handle, prw.gpe_bit); 1946 1947 /* 1948 * Ignore devices that do not have a _HID or _CID. They should 1949 * be discovered by other buses (e.g. the PCI bus driver). 1950 */ 1951 if (!acpi_has_hid(handle)) 1952 break; 1953 /* FALLTHROUGH */ 1954 case ACPI_TYPE_PROCESSOR: 1955 case ACPI_TYPE_THERMAL: 1956 case ACPI_TYPE_POWER: 1957 /* 1958 * Create a placeholder device for this node. Sort the 1959 * placeholder so that the probe/attach passes will run 1960 * breadth-first. Orders less than ACPI_DEV_BASE_ORDER 1961 * are reserved for special objects (i.e., system 1962 * resources). 1963 */ 1964 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str)); 1965 order = level * 10 + ACPI_DEV_BASE_ORDER; 1966 acpi_probe_order(handle, &order); 1967 child = BUS_ADD_CHILD(bus, order, NULL, -1); 1968 if (child == NULL) 1969 break; 1970 1971 /* Associate the handle with the device_t and vice versa. */ 1972 acpi_set_handle(child, handle); 1973 AcpiAttachData(handle, acpi_fake_objhandler, child); 1974 1975 /* 1976 * Check that the device is present. If it's not present, 1977 * leave it disabled (so that we have a device_t attached to 1978 * the handle, but we don't probe it). 1979 * 1980 * XXX PCI link devices sometimes report "present" but not 1981 * "functional" (i.e. if disabled). Go ahead and probe them 1982 * anyway since we may enable them later. 1983 */ 1984 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 1985 /* Never disable PCI link devices. */ 1986 if (acpi_MatchHid(handle, "PNP0C0F")) 1987 break; 1988 /* 1989 * Docking stations should remain enabled since the system 1990 * may be undocked at boot. 1991 */ 1992 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h))) 1993 break; 1994 1995 device_disable(child); 1996 break; 1997 } 1998 1999 /* 2000 * Get the device's resource settings and attach them. 2001 * Note that if the device has _PRS but no _CRS, we need 2002 * to decide when it's appropriate to try to configure the 2003 * device. Ignore the return value here; it's OK for the 2004 * device not to have any resources. 2005 */ 2006 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 2007 break; 2008 } 2009 } 2010 2011 return_ACPI_STATUS (AE_OK); 2012 } 2013 2014 /* 2015 * AcpiAttachData() requires an object handler but never uses it. This is a 2016 * placeholder object handler so we can store a device_t in an ACPI_HANDLE. 2017 */ 2018 void 2019 acpi_fake_objhandler(ACPI_HANDLE h, void *data) 2020 { 2021 } 2022 2023 static void 2024 acpi_shutdown_final(void *arg, int howto) 2025 { 2026 struct acpi_softc *sc = (struct acpi_softc *)arg; 2027 register_t intr; 2028 ACPI_STATUS status; 2029 2030 /* 2031 * XXX Shutdown code should only run on the BSP (cpuid 0). 2032 * Some chipsets do not power off the system correctly if called from 2033 * an AP. 2034 */ 2035 if ((howto & RB_POWEROFF) != 0) { 2036 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 2037 if (ACPI_FAILURE(status)) { 2038 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2039 AcpiFormatException(status)); 2040 return; 2041 } 2042 device_printf(sc->acpi_dev, "Powering system off\n"); 2043 intr = intr_disable(); 2044 status = AcpiEnterSleepState(ACPI_STATE_S5); 2045 if (ACPI_FAILURE(status)) { 2046 intr_restore(intr); 2047 device_printf(sc->acpi_dev, "power-off failed - %s\n", 2048 AcpiFormatException(status)); 2049 } else { 2050 DELAY(1000000); 2051 intr_restore(intr); 2052 device_printf(sc->acpi_dev, "power-off failed - timeout\n"); 2053 } 2054 } else if ((howto & RB_HALT) == 0 && sc->acpi_handle_reboot) { 2055 /* Reboot using the reset register. */ 2056 status = AcpiReset(); 2057 if (ACPI_SUCCESS(status)) { 2058 DELAY(1000000); 2059 device_printf(sc->acpi_dev, "reset failed - timeout\n"); 2060 } else if (status != AE_NOT_EXIST) 2061 device_printf(sc->acpi_dev, "reset failed - %s\n", 2062 AcpiFormatException(status)); 2063 } else if (sc->acpi_do_disable && panicstr == NULL) { 2064 /* 2065 * Only disable ACPI if the user requested. On some systems, writing 2066 * the disable value to SMI_CMD hangs the system. 2067 */ 2068 device_printf(sc->acpi_dev, "Shutting down\n"); 2069 AcpiTerminate(); 2070 } 2071 } 2072 2073 static void 2074 acpi_enable_fixed_events(struct acpi_softc *sc) 2075 { 2076 static int first_time = 1; 2077 2078 /* Enable and clear fixed events and install handlers. */ 2079 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) { 2080 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 2081 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 2082 acpi_event_power_button_sleep, sc); 2083 if (first_time) 2084 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 2085 } 2086 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) { 2087 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 2088 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 2089 acpi_event_sleep_button_sleep, sc); 2090 if (first_time) 2091 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 2092 } 2093 2094 first_time = 0; 2095 } 2096 2097 /* 2098 * Returns true if the device is actually present and should 2099 * be attached to. This requires the present, enabled, UI-visible 2100 * and diagnostics-passed bits to be set. 2101 */ 2102 BOOLEAN 2103 acpi_DeviceIsPresent(device_t dev) 2104 { 2105 ACPI_DEVICE_INFO *devinfo; 2106 ACPI_HANDLE h; 2107 BOOLEAN present; 2108 2109 if ((h = acpi_get_handle(dev)) == NULL || 2110 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2111 return (FALSE); 2112 2113 /* If no _STA method, must be present */ 2114 present = (devinfo->Valid & ACPI_VALID_STA) == 0 || 2115 ACPI_DEVICE_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE; 2116 2117 AcpiOsFree(devinfo); 2118 return (present); 2119 } 2120 2121 /* 2122 * Returns true if the battery is actually present and inserted. 2123 */ 2124 BOOLEAN 2125 acpi_BatteryIsPresent(device_t dev) 2126 { 2127 ACPI_DEVICE_INFO *devinfo; 2128 ACPI_HANDLE h; 2129 BOOLEAN present; 2130 2131 if ((h = acpi_get_handle(dev)) == NULL || 2132 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2133 return (FALSE); 2134 2135 /* If no _STA method, must be present */ 2136 present = (devinfo->Valid & ACPI_VALID_STA) == 0 || 2137 ACPI_BATTERY_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE; 2138 2139 AcpiOsFree(devinfo); 2140 return (present); 2141 } 2142 2143 /* 2144 * Returns true if a device has at least one valid device ID. 2145 */ 2146 static BOOLEAN 2147 acpi_has_hid(ACPI_HANDLE h) 2148 { 2149 ACPI_DEVICE_INFO *devinfo; 2150 BOOLEAN ret; 2151 2152 if (h == NULL || 2153 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2154 return (FALSE); 2155 2156 ret = FALSE; 2157 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 2158 ret = TRUE; 2159 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) 2160 if (devinfo->CompatibleIdList.Count > 0) 2161 ret = TRUE; 2162 2163 AcpiOsFree(devinfo); 2164 return (ret); 2165 } 2166 2167 /* 2168 * Match a HID string against a handle 2169 */ 2170 BOOLEAN 2171 acpi_MatchHid(ACPI_HANDLE h, const char *hid) 2172 { 2173 ACPI_DEVICE_INFO *devinfo; 2174 BOOLEAN ret; 2175 int i; 2176 2177 if (hid == NULL || h == NULL || 2178 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2179 return (FALSE); 2180 2181 ret = FALSE; 2182 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 2183 strcmp(hid, devinfo->HardwareId.String) == 0) 2184 ret = TRUE; 2185 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) 2186 for (i = 0; i < devinfo->CompatibleIdList.Count; i++) { 2187 if (strcmp(hid, devinfo->CompatibleIdList.Ids[i].String) == 0) { 2188 ret = TRUE; 2189 break; 2190 } 2191 } 2192 2193 AcpiOsFree(devinfo); 2194 return (ret); 2195 } 2196 2197 /* 2198 * Return the handle of a named object within our scope, ie. that of (parent) 2199 * or one if its parents. 2200 */ 2201 ACPI_STATUS 2202 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 2203 { 2204 ACPI_HANDLE r; 2205 ACPI_STATUS status; 2206 2207 /* Walk back up the tree to the root */ 2208 for (;;) { 2209 status = AcpiGetHandle(parent, path, &r); 2210 if (ACPI_SUCCESS(status)) { 2211 *result = r; 2212 return (AE_OK); 2213 } 2214 /* XXX Return error here? */ 2215 if (status != AE_NOT_FOUND) 2216 return (AE_OK); 2217 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 2218 return (AE_NOT_FOUND); 2219 parent = r; 2220 } 2221 } 2222 2223 /* 2224 * Allocate a buffer with a preset data size. 2225 */ 2226 ACPI_BUFFER * 2227 acpi_AllocBuffer(int size) 2228 { 2229 ACPI_BUFFER *buf; 2230 2231 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 2232 return (NULL); 2233 buf->Length = size; 2234 buf->Pointer = (void *)(buf + 1); 2235 return (buf); 2236 } 2237 2238 ACPI_STATUS 2239 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 2240 { 2241 ACPI_OBJECT arg1; 2242 ACPI_OBJECT_LIST args; 2243 2244 arg1.Type = ACPI_TYPE_INTEGER; 2245 arg1.Integer.Value = number; 2246 args.Count = 1; 2247 args.Pointer = &arg1; 2248 2249 return (AcpiEvaluateObject(handle, path, &args, NULL)); 2250 } 2251 2252 /* 2253 * Evaluate a path that should return an integer. 2254 */ 2255 ACPI_STATUS 2256 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 2257 { 2258 ACPI_STATUS status; 2259 ACPI_BUFFER buf; 2260 ACPI_OBJECT param; 2261 2262 if (handle == NULL) 2263 handle = ACPI_ROOT_OBJECT; 2264 2265 /* 2266 * Assume that what we've been pointed at is an Integer object, or 2267 * a method that will return an Integer. 2268 */ 2269 buf.Pointer = ¶m; 2270 buf.Length = sizeof(param); 2271 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2272 if (ACPI_SUCCESS(status)) { 2273 if (param.Type == ACPI_TYPE_INTEGER) 2274 *number = param.Integer.Value; 2275 else 2276 status = AE_TYPE; 2277 } 2278 2279 /* 2280 * In some applications, a method that's expected to return an Integer 2281 * may instead return a Buffer (probably to simplify some internal 2282 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 2283 * convert it into an Integer as best we can. 2284 * 2285 * This is a hack. 2286 */ 2287 if (status == AE_BUFFER_OVERFLOW) { 2288 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 2289 status = AE_NO_MEMORY; 2290 } else { 2291 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2292 if (ACPI_SUCCESS(status)) 2293 status = acpi_ConvertBufferToInteger(&buf, number); 2294 AcpiOsFree(buf.Pointer); 2295 } 2296 } 2297 return (status); 2298 } 2299 2300 ACPI_STATUS 2301 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 2302 { 2303 ACPI_OBJECT *p; 2304 UINT8 *val; 2305 int i; 2306 2307 p = (ACPI_OBJECT *)bufp->Pointer; 2308 if (p->Type == ACPI_TYPE_INTEGER) { 2309 *number = p->Integer.Value; 2310 return (AE_OK); 2311 } 2312 if (p->Type != ACPI_TYPE_BUFFER) 2313 return (AE_TYPE); 2314 if (p->Buffer.Length > sizeof(int)) 2315 return (AE_BAD_DATA); 2316 2317 *number = 0; 2318 val = p->Buffer.Pointer; 2319 for (i = 0; i < p->Buffer.Length; i++) 2320 *number += val[i] << (i * 8); 2321 return (AE_OK); 2322 } 2323 2324 /* 2325 * Iterate over the elements of an a package object, calling the supplied 2326 * function for each element. 2327 * 2328 * XXX possible enhancement might be to abort traversal on error. 2329 */ 2330 ACPI_STATUS 2331 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 2332 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 2333 { 2334 ACPI_OBJECT *comp; 2335 int i; 2336 2337 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 2338 return (AE_BAD_PARAMETER); 2339 2340 /* Iterate over components */ 2341 i = 0; 2342 comp = pkg->Package.Elements; 2343 for (; i < pkg->Package.Count; i++, comp++) 2344 func(comp, arg); 2345 2346 return (AE_OK); 2347 } 2348 2349 /* 2350 * Find the (index)th resource object in a set. 2351 */ 2352 ACPI_STATUS 2353 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 2354 { 2355 ACPI_RESOURCE *rp; 2356 int i; 2357 2358 rp = (ACPI_RESOURCE *)buf->Pointer; 2359 i = index; 2360 while (i-- > 0) { 2361 /* Range check */ 2362 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2363 return (AE_BAD_PARAMETER); 2364 2365 /* Check for terminator */ 2366 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2367 return (AE_NOT_FOUND); 2368 rp = ACPI_NEXT_RESOURCE(rp); 2369 } 2370 if (resp != NULL) 2371 *resp = rp; 2372 2373 return (AE_OK); 2374 } 2375 2376 /* 2377 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 2378 * 2379 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 2380 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 2381 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 2382 * resources. 2383 */ 2384 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 2385 2386 ACPI_STATUS 2387 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 2388 { 2389 ACPI_RESOURCE *rp; 2390 void *newp; 2391 2392 /* Initialise the buffer if necessary. */ 2393 if (buf->Pointer == NULL) { 2394 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 2395 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 2396 return (AE_NO_MEMORY); 2397 rp = (ACPI_RESOURCE *)buf->Pointer; 2398 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2399 rp->Length = ACPI_RS_SIZE_MIN; 2400 } 2401 if (res == NULL) 2402 return (AE_OK); 2403 2404 /* 2405 * Scan the current buffer looking for the terminator. 2406 * This will either find the terminator or hit the end 2407 * of the buffer and return an error. 2408 */ 2409 rp = (ACPI_RESOURCE *)buf->Pointer; 2410 for (;;) { 2411 /* Range check, don't go outside the buffer */ 2412 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2413 return (AE_BAD_PARAMETER); 2414 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2415 break; 2416 rp = ACPI_NEXT_RESOURCE(rp); 2417 } 2418 2419 /* 2420 * Check the size of the buffer and expand if required. 2421 * 2422 * Required size is: 2423 * size of existing resources before terminator + 2424 * size of new resource and header + 2425 * size of terminator. 2426 * 2427 * Note that this loop should really only run once, unless 2428 * for some reason we are stuffing a *really* huge resource. 2429 */ 2430 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 2431 res->Length + ACPI_RS_SIZE_NO_DATA + 2432 ACPI_RS_SIZE_MIN) >= buf->Length) { 2433 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 2434 return (AE_NO_MEMORY); 2435 bcopy(buf->Pointer, newp, buf->Length); 2436 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 2437 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 2438 AcpiOsFree(buf->Pointer); 2439 buf->Pointer = newp; 2440 buf->Length += buf->Length; 2441 } 2442 2443 /* Insert the new resource. */ 2444 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA); 2445 2446 /* And add the terminator. */ 2447 rp = ACPI_NEXT_RESOURCE(rp); 2448 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2449 rp->Length = ACPI_RS_SIZE_MIN; 2450 2451 return (AE_OK); 2452 } 2453 2454 /* 2455 * Set interrupt model. 2456 */ 2457 ACPI_STATUS 2458 acpi_SetIntrModel(int model) 2459 { 2460 2461 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 2462 } 2463 2464 /* 2465 * Walk subtables of a table and call a callback routine for each 2466 * subtable. The caller should provide the first subtable and a 2467 * pointer to the end of the table. This can be used to walk tables 2468 * such as MADT and SRAT that use subtable entries. 2469 */ 2470 void 2471 acpi_walk_subtables(void *first, void *end, acpi_subtable_handler *handler, 2472 void *arg) 2473 { 2474 ACPI_SUBTABLE_HEADER *entry; 2475 2476 for (entry = first; (void *)entry < end; ) { 2477 /* Avoid an infinite loop if we hit a bogus entry. */ 2478 if (entry->Length < sizeof(ACPI_SUBTABLE_HEADER)) 2479 return; 2480 2481 handler(entry, arg); 2482 entry = ACPI_ADD_PTR(ACPI_SUBTABLE_HEADER, entry, entry->Length); 2483 } 2484 } 2485 2486 /* 2487 * DEPRECATED. This interface has serious deficiencies and will be 2488 * removed. 2489 * 2490 * Immediately enter the sleep state. In the old model, acpiconf(8) ran 2491 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this. 2492 */ 2493 ACPI_STATUS 2494 acpi_SetSleepState(struct acpi_softc *sc, int state) 2495 { 2496 static int once; 2497 2498 if (!once) { 2499 device_printf(sc->acpi_dev, 2500 "warning: acpi_SetSleepState() deprecated, need to update your software\n"); 2501 once = 1; 2502 } 2503 return (acpi_EnterSleepState(sc, state)); 2504 } 2505 2506 #if defined(__amd64__) || defined(__i386__) 2507 static void 2508 acpi_sleep_force_task(void *context) 2509 { 2510 struct acpi_softc *sc = (struct acpi_softc *)context; 2511 2512 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2513 device_printf(sc->acpi_dev, "force sleep state S%d failed\n", 2514 sc->acpi_next_sstate); 2515 } 2516 2517 static void 2518 acpi_sleep_force(void *arg) 2519 { 2520 struct acpi_softc *sc = (struct acpi_softc *)arg; 2521 2522 device_printf(sc->acpi_dev, 2523 "suspend request timed out, forcing sleep now\n"); 2524 /* 2525 * XXX Suspending from callout causes freezes in DEVICE_SUSPEND(). 2526 * Suspend from acpi_task thread instead. 2527 */ 2528 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 2529 acpi_sleep_force_task, sc))) 2530 device_printf(sc->acpi_dev, "AcpiOsExecute() for sleeping failed\n"); 2531 } 2532 #endif 2533 2534 /* 2535 * Request that the system enter the given suspend state. All /dev/apm 2536 * devices and devd(8) will be notified. Userland then has a chance to 2537 * save state and acknowledge the request. The system sleeps once all 2538 * acks are in. 2539 */ 2540 int 2541 acpi_ReqSleepState(struct acpi_softc *sc, int state) 2542 { 2543 #if defined(__amd64__) || defined(__i386__) 2544 struct apm_clone_data *clone; 2545 ACPI_STATUS status; 2546 2547 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX) 2548 return (EINVAL); 2549 if (!acpi_sleep_states[state]) 2550 return (EOPNOTSUPP); 2551 2552 /* If a suspend request is already in progress, just return. */ 2553 if (sc->acpi_next_sstate != 0) { 2554 return (0); 2555 } 2556 2557 /* Wait until sleep is enabled. */ 2558 while (sc->acpi_sleep_disabled) { 2559 AcpiOsSleep(1000); 2560 } 2561 2562 ACPI_LOCK(acpi); 2563 2564 sc->acpi_next_sstate = state; 2565 2566 /* S5 (soft-off) should be entered directly with no waiting. */ 2567 if (state == ACPI_STATE_S5) { 2568 ACPI_UNLOCK(acpi); 2569 status = acpi_EnterSleepState(sc, state); 2570 return (ACPI_SUCCESS(status) ? 0 : ENXIO); 2571 } 2572 2573 /* Record the pending state and notify all apm devices. */ 2574 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2575 clone->notify_status = APM_EV_NONE; 2576 if ((clone->flags & ACPI_EVF_DEVD) == 0) { 2577 selwakeuppri(&clone->sel_read, PZERO); 2578 KNOTE_LOCKED(&clone->sel_read.si_note, 0); 2579 } 2580 } 2581 2582 /* If devd(8) is not running, immediately enter the sleep state. */ 2583 if (!devctl_process_running()) { 2584 ACPI_UNLOCK(acpi); 2585 status = acpi_EnterSleepState(sc, state); 2586 return (ACPI_SUCCESS(status) ? 0 : ENXIO); 2587 } 2588 2589 /* 2590 * Set a timeout to fire if userland doesn't ack the suspend request 2591 * in time. This way we still eventually go to sleep if we were 2592 * overheating or running low on battery, even if userland is hung. 2593 * We cancel this timeout once all userland acks are in or the 2594 * suspend request is aborted. 2595 */ 2596 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc); 2597 ACPI_UNLOCK(acpi); 2598 2599 /* Now notify devd(8) also. */ 2600 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state); 2601 2602 return (0); 2603 #else 2604 /* This platform does not support acpi suspend/resume. */ 2605 return (EOPNOTSUPP); 2606 #endif 2607 } 2608 2609 /* 2610 * Acknowledge (or reject) a pending sleep state. The caller has 2611 * prepared for suspend and is now ready for it to proceed. If the 2612 * error argument is non-zero, it indicates suspend should be cancelled 2613 * and gives an errno value describing why. Once all votes are in, 2614 * we suspend the system. 2615 */ 2616 int 2617 acpi_AckSleepState(struct apm_clone_data *clone, int error) 2618 { 2619 #if defined(__amd64__) || defined(__i386__) 2620 struct acpi_softc *sc; 2621 int ret, sleeping; 2622 2623 /* If no pending sleep state, return an error. */ 2624 ACPI_LOCK(acpi); 2625 sc = clone->acpi_sc; 2626 if (sc->acpi_next_sstate == 0) { 2627 ACPI_UNLOCK(acpi); 2628 return (ENXIO); 2629 } 2630 2631 /* Caller wants to abort suspend process. */ 2632 if (error) { 2633 sc->acpi_next_sstate = 0; 2634 callout_stop(&sc->susp_force_to); 2635 device_printf(sc->acpi_dev, 2636 "listener on %s cancelled the pending suspend\n", 2637 devtoname(clone->cdev)); 2638 ACPI_UNLOCK(acpi); 2639 return (0); 2640 } 2641 2642 /* 2643 * Mark this device as acking the suspend request. Then, walk through 2644 * all devices, seeing if they agree yet. We only count devices that 2645 * are writable since read-only devices couldn't ack the request. 2646 */ 2647 sleeping = TRUE; 2648 clone->notify_status = APM_EV_ACKED; 2649 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2650 if ((clone->flags & ACPI_EVF_WRITE) != 0 && 2651 clone->notify_status != APM_EV_ACKED) { 2652 sleeping = FALSE; 2653 break; 2654 } 2655 } 2656 2657 /* If all devices have voted "yes", we will suspend now. */ 2658 if (sleeping) 2659 callout_stop(&sc->susp_force_to); 2660 ACPI_UNLOCK(acpi); 2661 ret = 0; 2662 if (sleeping) { 2663 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2664 ret = ENODEV; 2665 } 2666 return (ret); 2667 #else 2668 /* This platform does not support acpi suspend/resume. */ 2669 return (EOPNOTSUPP); 2670 #endif 2671 } 2672 2673 static void 2674 acpi_sleep_enable(void *arg) 2675 { 2676 struct acpi_softc *sc = (struct acpi_softc *)arg; 2677 2678 ACPI_LOCK_ASSERT(acpi); 2679 2680 /* Reschedule if the system is not fully up and running. */ 2681 if (!AcpiGbl_SystemAwakeAndRunning) { 2682 callout_schedule(&acpi_sleep_timer, hz * ACPI_MINIMUM_AWAKETIME); 2683 return; 2684 } 2685 2686 sc->acpi_sleep_disabled = FALSE; 2687 } 2688 2689 static ACPI_STATUS 2690 acpi_sleep_disable(struct acpi_softc *sc) 2691 { 2692 ACPI_STATUS status; 2693 2694 /* Fail if the system is not fully up and running. */ 2695 if (!AcpiGbl_SystemAwakeAndRunning) 2696 return (AE_ERROR); 2697 2698 ACPI_LOCK(acpi); 2699 status = sc->acpi_sleep_disabled ? AE_ERROR : AE_OK; 2700 sc->acpi_sleep_disabled = TRUE; 2701 ACPI_UNLOCK(acpi); 2702 2703 return (status); 2704 } 2705 2706 enum acpi_sleep_state { 2707 ACPI_SS_NONE, 2708 ACPI_SS_GPE_SET, 2709 ACPI_SS_DEV_SUSPEND, 2710 ACPI_SS_SLP_PREP, 2711 ACPI_SS_SLEPT, 2712 }; 2713 2714 /* 2715 * Enter the desired system sleep state. 2716 * 2717 * Currently we support S1-S5 but S4 is only S4BIOS 2718 */ 2719 static ACPI_STATUS 2720 acpi_EnterSleepState(struct acpi_softc *sc, int state) 2721 { 2722 register_t intr; 2723 ACPI_STATUS status; 2724 ACPI_EVENT_STATUS power_button_status; 2725 enum acpi_sleep_state slp_state; 2726 int sleep_result; 2727 2728 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2729 2730 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX) 2731 return_ACPI_STATUS (AE_BAD_PARAMETER); 2732 if (!acpi_sleep_states[state]) { 2733 device_printf(sc->acpi_dev, "Sleep state S%d not supported by BIOS\n", 2734 state); 2735 return (AE_SUPPORT); 2736 } 2737 2738 /* Re-entry once we're suspending is not allowed. */ 2739 status = acpi_sleep_disable(sc); 2740 if (ACPI_FAILURE(status)) { 2741 device_printf(sc->acpi_dev, 2742 "suspend request ignored (not ready yet)\n"); 2743 return (status); 2744 } 2745 2746 if (state == ACPI_STATE_S5) { 2747 /* 2748 * Shut down cleanly and power off. This will call us back through the 2749 * shutdown handlers. 2750 */ 2751 shutdown_nice(RB_POWEROFF); 2752 return_ACPI_STATUS (AE_OK); 2753 } 2754 2755 EVENTHANDLER_INVOKE(power_suspend_early); 2756 stop_all_proc(); 2757 EVENTHANDLER_INVOKE(power_suspend); 2758 2759 if (smp_started) { 2760 thread_lock(curthread); 2761 sched_bind(curthread, 0); 2762 thread_unlock(curthread); 2763 } 2764 2765 /* 2766 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE 2767 * drivers need this. 2768 */ 2769 mtx_lock(&Giant); 2770 2771 slp_state = ACPI_SS_NONE; 2772 2773 sc->acpi_sstate = state; 2774 2775 /* Enable any GPEs as appropriate and requested by the user. */ 2776 acpi_wake_prep_walk(state); 2777 slp_state = ACPI_SS_GPE_SET; 2778 2779 /* 2780 * Inform all devices that we are going to sleep. If at least one 2781 * device fails, DEVICE_SUSPEND() automatically resumes the tree. 2782 * 2783 * XXX Note that a better two-pass approach with a 'veto' pass 2784 * followed by a "real thing" pass would be better, but the current 2785 * bus interface does not provide for this. 2786 */ 2787 if (DEVICE_SUSPEND(root_bus) != 0) { 2788 device_printf(sc->acpi_dev, "device_suspend failed\n"); 2789 goto backout; 2790 } 2791 slp_state = ACPI_SS_DEV_SUSPEND; 2792 2793 /* If testing device suspend only, back out of everything here. */ 2794 if (acpi_susp_bounce) 2795 goto backout; 2796 2797 status = AcpiEnterSleepStatePrep(state); 2798 if (ACPI_FAILURE(status)) { 2799 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2800 AcpiFormatException(status)); 2801 goto backout; 2802 } 2803 slp_state = ACPI_SS_SLP_PREP; 2804 2805 if (sc->acpi_sleep_delay > 0) 2806 DELAY(sc->acpi_sleep_delay * 1000000); 2807 2808 intr = intr_disable(); 2809 if (state != ACPI_STATE_S1) { 2810 sleep_result = acpi_sleep_machdep(sc, state); 2811 acpi_wakeup_machdep(sc, state, sleep_result, 0); 2812 2813 /* 2814 * XXX According to ACPI specification SCI_EN bit should be restored 2815 * by ACPI platform (BIOS, firmware) to its pre-sleep state. 2816 * Unfortunately some BIOSes fail to do that and that leads to 2817 * unexpected and serious consequences during wake up like a system 2818 * getting stuck in SMI handlers. 2819 * This hack is picked up from Linux, which claims that it follows 2820 * Windows behavior. 2821 */ 2822 if (sleep_result == 1 && state != ACPI_STATE_S4) 2823 AcpiWriteBitRegister(ACPI_BITREG_SCI_ENABLE, ACPI_ENABLE_EVENT); 2824 2825 AcpiLeaveSleepStatePrep(state); 2826 2827 if (sleep_result == 1 && state == ACPI_STATE_S3) { 2828 /* 2829 * Prevent mis-interpretation of the wakeup by power button 2830 * as a request for power off. 2831 * Ideally we should post an appropriate wakeup event, 2832 * perhaps using acpi_event_power_button_wake or alike. 2833 * 2834 * Clearing of power button status after wakeup is mandated 2835 * by ACPI specification in section "Fixed Power Button". 2836 * 2837 * XXX As of ACPICA 20121114 AcpiGetEventStatus provides 2838 * status as 0/1 corressponding to inactive/active despite 2839 * its type being ACPI_EVENT_STATUS. In other words, 2840 * we should not test for ACPI_EVENT_FLAG_SET for time being. 2841 */ 2842 if (ACPI_SUCCESS(AcpiGetEventStatus(ACPI_EVENT_POWER_BUTTON, 2843 &power_button_status)) && power_button_status != 0) { 2844 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 2845 device_printf(sc->acpi_dev, 2846 "cleared fixed power button status\n"); 2847 } 2848 } 2849 2850 intr_restore(intr); 2851 2852 /* call acpi_wakeup_machdep() again with interrupt enabled */ 2853 acpi_wakeup_machdep(sc, state, sleep_result, 1); 2854 2855 if (sleep_result == -1) 2856 goto backout; 2857 2858 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 2859 if (state == ACPI_STATE_S4) 2860 AcpiEnable(); 2861 } else { 2862 status = AcpiEnterSleepState(state); 2863 AcpiLeaveSleepStatePrep(state); 2864 intr_restore(intr); 2865 if (ACPI_FAILURE(status)) { 2866 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 2867 AcpiFormatException(status)); 2868 goto backout; 2869 } 2870 } 2871 slp_state = ACPI_SS_SLEPT; 2872 2873 /* 2874 * Back out state according to how far along we got in the suspend 2875 * process. This handles both the error and success cases. 2876 */ 2877 backout: 2878 if (slp_state >= ACPI_SS_GPE_SET) { 2879 acpi_wake_prep_walk(state); 2880 sc->acpi_sstate = ACPI_STATE_S0; 2881 } 2882 if (slp_state >= ACPI_SS_DEV_SUSPEND) 2883 DEVICE_RESUME(root_bus); 2884 if (slp_state >= ACPI_SS_SLP_PREP) 2885 AcpiLeaveSleepState(state); 2886 if (slp_state >= ACPI_SS_SLEPT) { 2887 acpi_resync_clock(sc); 2888 acpi_enable_fixed_events(sc); 2889 } 2890 sc->acpi_next_sstate = 0; 2891 2892 mtx_unlock(&Giant); 2893 2894 if (smp_started) { 2895 thread_lock(curthread); 2896 sched_unbind(curthread); 2897 thread_unlock(curthread); 2898 } 2899 2900 resume_all_proc(); 2901 2902 EVENTHANDLER_INVOKE(power_resume); 2903 2904 /* Allow another sleep request after a while. */ 2905 callout_schedule(&acpi_sleep_timer, hz * ACPI_MINIMUM_AWAKETIME); 2906 2907 /* Run /etc/rc.resume after we are back. */ 2908 if (devctl_process_running()) 2909 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state); 2910 2911 return_ACPI_STATUS (status); 2912 } 2913 2914 static void 2915 acpi_resync_clock(struct acpi_softc *sc) 2916 { 2917 #ifdef __amd64__ 2918 if (!acpi_reset_clock) 2919 return; 2920 2921 /* 2922 * Warm up timecounter again and reset system clock. 2923 */ 2924 (void)timecounter->tc_get_timecount(timecounter); 2925 (void)timecounter->tc_get_timecount(timecounter); 2926 inittodr(time_second + sc->acpi_sleep_delay); 2927 #endif 2928 } 2929 2930 /* Enable or disable the device's wake GPE. */ 2931 int 2932 acpi_wake_set_enable(device_t dev, int enable) 2933 { 2934 struct acpi_prw_data prw; 2935 ACPI_STATUS status; 2936 int flags; 2937 2938 /* Make sure the device supports waking the system and get the GPE. */ 2939 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 2940 return (ENXIO); 2941 2942 flags = acpi_get_flags(dev); 2943 if (enable) { 2944 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 2945 ACPI_GPE_ENABLE); 2946 if (ACPI_FAILURE(status)) { 2947 device_printf(dev, "enable wake failed\n"); 2948 return (ENXIO); 2949 } 2950 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); 2951 } else { 2952 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 2953 ACPI_GPE_DISABLE); 2954 if (ACPI_FAILURE(status)) { 2955 device_printf(dev, "disable wake failed\n"); 2956 return (ENXIO); 2957 } 2958 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); 2959 } 2960 2961 return (0); 2962 } 2963 2964 static int 2965 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate) 2966 { 2967 struct acpi_prw_data prw; 2968 device_t dev; 2969 2970 /* Check that this is a wake-capable device and get its GPE. */ 2971 if (acpi_parse_prw(handle, &prw) != 0) 2972 return (ENXIO); 2973 dev = acpi_get_device(handle); 2974 2975 /* 2976 * The destination sleep state must be less than (i.e., higher power) 2977 * or equal to the value specified by _PRW. If this GPE cannot be 2978 * enabled for the next sleep state, then disable it. If it can and 2979 * the user requested it be enabled, turn on any required power resources 2980 * and set _PSW. 2981 */ 2982 if (sstate > prw.lowest_wake) { 2983 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_DISABLE); 2984 if (bootverbose) 2985 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n", 2986 acpi_name(handle), sstate); 2987 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) { 2988 acpi_pwr_wake_enable(handle, 1); 2989 acpi_SetInteger(handle, "_PSW", 1); 2990 if (bootverbose) 2991 device_printf(dev, "wake_prep enabled for %s (S%d)\n", 2992 acpi_name(handle), sstate); 2993 } 2994 2995 return (0); 2996 } 2997 2998 static int 2999 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate) 3000 { 3001 struct acpi_prw_data prw; 3002 device_t dev; 3003 3004 /* 3005 * Check that this is a wake-capable device and get its GPE. Return 3006 * now if the user didn't enable this device for wake. 3007 */ 3008 if (acpi_parse_prw(handle, &prw) != 0) 3009 return (ENXIO); 3010 dev = acpi_get_device(handle); 3011 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0) 3012 return (0); 3013 3014 /* 3015 * If this GPE couldn't be enabled for the previous sleep state, it was 3016 * disabled before going to sleep so re-enable it. If it was enabled, 3017 * clear _PSW and turn off any power resources it used. 3018 */ 3019 if (sstate > prw.lowest_wake) { 3020 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_ENABLE); 3021 if (bootverbose) 3022 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle)); 3023 } else { 3024 acpi_SetInteger(handle, "_PSW", 0); 3025 acpi_pwr_wake_enable(handle, 0); 3026 if (bootverbose) 3027 device_printf(dev, "run_prep cleaned up for %s\n", 3028 acpi_name(handle)); 3029 } 3030 3031 return (0); 3032 } 3033 3034 static ACPI_STATUS 3035 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 3036 { 3037 int sstate; 3038 3039 /* If suspending, run the sleep prep function, otherwise wake. */ 3040 sstate = *(int *)context; 3041 if (AcpiGbl_SystemAwakeAndRunning) 3042 acpi_wake_sleep_prep(handle, sstate); 3043 else 3044 acpi_wake_run_prep(handle, sstate); 3045 return (AE_OK); 3046 } 3047 3048 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */ 3049 static int 3050 acpi_wake_prep_walk(int sstate) 3051 { 3052 ACPI_HANDLE sb_handle; 3053 3054 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) 3055 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100, 3056 acpi_wake_prep, NULL, &sstate, NULL); 3057 return (0); 3058 } 3059 3060 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */ 3061 static int 3062 acpi_wake_sysctl_walk(device_t dev) 3063 { 3064 int error, i, numdevs; 3065 device_t *devlist; 3066 device_t child; 3067 ACPI_STATUS status; 3068 3069 error = device_get_children(dev, &devlist, &numdevs); 3070 if (error != 0 || numdevs == 0) { 3071 if (numdevs == 0) 3072 free(devlist, M_TEMP); 3073 return (error); 3074 } 3075 for (i = 0; i < numdevs; i++) { 3076 child = devlist[i]; 3077 acpi_wake_sysctl_walk(child); 3078 if (!device_is_attached(child)) 3079 continue; 3080 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL); 3081 if (ACPI_SUCCESS(status)) { 3082 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child), 3083 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO, 3084 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0, 3085 acpi_wake_set_sysctl, "I", "Device set to wake the system"); 3086 } 3087 } 3088 free(devlist, M_TEMP); 3089 3090 return (0); 3091 } 3092 3093 /* Enable or disable wake from userland. */ 3094 static int 3095 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS) 3096 { 3097 int enable, error; 3098 device_t dev; 3099 3100 dev = (device_t)arg1; 3101 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0; 3102 3103 error = sysctl_handle_int(oidp, &enable, 0, req); 3104 if (error != 0 || req->newptr == NULL) 3105 return (error); 3106 if (enable != 0 && enable != 1) 3107 return (EINVAL); 3108 3109 return (acpi_wake_set_enable(dev, enable)); 3110 } 3111 3112 /* Parse a device's _PRW into a structure. */ 3113 int 3114 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) 3115 { 3116 ACPI_STATUS status; 3117 ACPI_BUFFER prw_buffer; 3118 ACPI_OBJECT *res, *res2; 3119 int error, i, power_count; 3120 3121 if (h == NULL || prw == NULL) 3122 return (EINVAL); 3123 3124 /* 3125 * The _PRW object (7.2.9) is only required for devices that have the 3126 * ability to wake the system from a sleeping state. 3127 */ 3128 error = EINVAL; 3129 prw_buffer.Pointer = NULL; 3130 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 3131 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 3132 if (ACPI_FAILURE(status)) 3133 return (ENOENT); 3134 res = (ACPI_OBJECT *)prw_buffer.Pointer; 3135 if (res == NULL) 3136 return (ENOENT); 3137 if (!ACPI_PKG_VALID(res, 2)) 3138 goto out; 3139 3140 /* 3141 * Element 1 of the _PRW object: 3142 * The lowest power system sleeping state that can be entered while still 3143 * providing wake functionality. The sleeping state being entered must 3144 * be less than (i.e., higher power) or equal to this value. 3145 */ 3146 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) 3147 goto out; 3148 3149 /* 3150 * Element 0 of the _PRW object: 3151 */ 3152 switch (res->Package.Elements[0].Type) { 3153 case ACPI_TYPE_INTEGER: 3154 /* 3155 * If the data type of this package element is numeric, then this 3156 * _PRW package element is the bit index in the GPEx_EN, in the 3157 * GPE blocks described in the FADT, of the enable bit that is 3158 * enabled for the wake event. 3159 */ 3160 prw->gpe_handle = NULL; 3161 prw->gpe_bit = res->Package.Elements[0].Integer.Value; 3162 error = 0; 3163 break; 3164 case ACPI_TYPE_PACKAGE: 3165 /* 3166 * If the data type of this package element is a package, then this 3167 * _PRW package element is itself a package containing two 3168 * elements. The first is an object reference to the GPE Block 3169 * device that contains the GPE that will be triggered by the wake 3170 * event. The second element is numeric and it contains the bit 3171 * index in the GPEx_EN, in the GPE Block referenced by the 3172 * first element in the package, of the enable bit that is enabled for 3173 * the wake event. 3174 * 3175 * For example, if this field is a package then it is of the form: 3176 * Package() {\_SB.PCI0.ISA.GPE, 2} 3177 */ 3178 res2 = &res->Package.Elements[0]; 3179 if (!ACPI_PKG_VALID(res2, 2)) 3180 goto out; 3181 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 3182 if (prw->gpe_handle == NULL) 3183 goto out; 3184 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) 3185 goto out; 3186 error = 0; 3187 break; 3188 default: 3189 goto out; 3190 } 3191 3192 /* Elements 2 to N of the _PRW object are power resources. */ 3193 power_count = res->Package.Count - 2; 3194 if (power_count > ACPI_PRW_MAX_POWERRES) { 3195 printf("ACPI device %s has too many power resources\n", acpi_name(h)); 3196 power_count = 0; 3197 } 3198 prw->power_res_count = power_count; 3199 for (i = 0; i < power_count; i++) 3200 prw->power_res[i] = res->Package.Elements[i]; 3201 3202 out: 3203 if (prw_buffer.Pointer != NULL) 3204 AcpiOsFree(prw_buffer.Pointer); 3205 return (error); 3206 } 3207 3208 /* 3209 * ACPI Event Handlers 3210 */ 3211 3212 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 3213 3214 static void 3215 acpi_system_eventhandler_sleep(void *arg, int state) 3216 { 3217 struct acpi_softc *sc = (struct acpi_softc *)arg; 3218 int ret; 3219 3220 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 3221 3222 /* Check if button action is disabled or unknown. */ 3223 if (state == ACPI_STATE_UNKNOWN) 3224 return; 3225 3226 /* Request that the system prepare to enter the given suspend state. */ 3227 ret = acpi_ReqSleepState(sc, state); 3228 if (ret != 0) 3229 device_printf(sc->acpi_dev, 3230 "request to enter state S%d failed (err %d)\n", state, ret); 3231 3232 return_VOID; 3233 } 3234 3235 static void 3236 acpi_system_eventhandler_wakeup(void *arg, int state) 3237 { 3238 3239 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 3240 3241 /* Currently, nothing to do for wakeup. */ 3242 3243 return_VOID; 3244 } 3245 3246 /* 3247 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 3248 */ 3249 static void 3250 acpi_invoke_sleep_eventhandler(void *context) 3251 { 3252 3253 EVENTHANDLER_INVOKE(acpi_sleep_event, *(int *)context); 3254 } 3255 3256 static void 3257 acpi_invoke_wake_eventhandler(void *context) 3258 { 3259 3260 EVENTHANDLER_INVOKE(acpi_wakeup_event, *(int *)context); 3261 } 3262 3263 UINT32 3264 acpi_event_power_button_sleep(void *context) 3265 { 3266 struct acpi_softc *sc = (struct acpi_softc *)context; 3267 3268 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3269 3270 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3271 acpi_invoke_sleep_eventhandler, &sc->acpi_power_button_sx))) 3272 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3273 return_VALUE (ACPI_INTERRUPT_HANDLED); 3274 } 3275 3276 UINT32 3277 acpi_event_power_button_wake(void *context) 3278 { 3279 struct acpi_softc *sc = (struct acpi_softc *)context; 3280 3281 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3282 3283 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3284 acpi_invoke_wake_eventhandler, &sc->acpi_power_button_sx))) 3285 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3286 return_VALUE (ACPI_INTERRUPT_HANDLED); 3287 } 3288 3289 UINT32 3290 acpi_event_sleep_button_sleep(void *context) 3291 { 3292 struct acpi_softc *sc = (struct acpi_softc *)context; 3293 3294 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3295 3296 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3297 acpi_invoke_sleep_eventhandler, &sc->acpi_sleep_button_sx))) 3298 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3299 return_VALUE (ACPI_INTERRUPT_HANDLED); 3300 } 3301 3302 UINT32 3303 acpi_event_sleep_button_wake(void *context) 3304 { 3305 struct acpi_softc *sc = (struct acpi_softc *)context; 3306 3307 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3308 3309 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3310 acpi_invoke_wake_eventhandler, &sc->acpi_sleep_button_sx))) 3311 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3312 return_VALUE (ACPI_INTERRUPT_HANDLED); 3313 } 3314 3315 /* 3316 * XXX This static buffer is suboptimal. There is no locking so only 3317 * use this for single-threaded callers. 3318 */ 3319 char * 3320 acpi_name(ACPI_HANDLE handle) 3321 { 3322 ACPI_BUFFER buf; 3323 static char data[256]; 3324 3325 buf.Length = sizeof(data); 3326 buf.Pointer = data; 3327 3328 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf))) 3329 return (data); 3330 return ("(unknown)"); 3331 } 3332 3333 /* 3334 * Debugging/bug-avoidance. Avoid trying to fetch info on various 3335 * parts of the namespace. 3336 */ 3337 int 3338 acpi_avoid(ACPI_HANDLE handle) 3339 { 3340 char *cp, *env, *np; 3341 int len; 3342 3343 np = acpi_name(handle); 3344 if (*np == '\\') 3345 np++; 3346 if ((env = kern_getenv("debug.acpi.avoid")) == NULL) 3347 return (0); 3348 3349 /* Scan the avoid list checking for a match */ 3350 cp = env; 3351 for (;;) { 3352 while (*cp != 0 && isspace(*cp)) 3353 cp++; 3354 if (*cp == 0) 3355 break; 3356 len = 0; 3357 while (cp[len] != 0 && !isspace(cp[len])) 3358 len++; 3359 if (!strncmp(cp, np, len)) { 3360 freeenv(env); 3361 return(1); 3362 } 3363 cp += len; 3364 } 3365 freeenv(env); 3366 3367 return (0); 3368 } 3369 3370 /* 3371 * Debugging/bug-avoidance. Disable ACPI subsystem components. 3372 */ 3373 int 3374 acpi_disabled(char *subsys) 3375 { 3376 char *cp, *env; 3377 int len; 3378 3379 if ((env = kern_getenv("debug.acpi.disabled")) == NULL) 3380 return (0); 3381 if (strcmp(env, "all") == 0) { 3382 freeenv(env); 3383 return (1); 3384 } 3385 3386 /* Scan the disable list, checking for a match. */ 3387 cp = env; 3388 for (;;) { 3389 while (*cp != '\0' && isspace(*cp)) 3390 cp++; 3391 if (*cp == '\0') 3392 break; 3393 len = 0; 3394 while (cp[len] != '\0' && !isspace(cp[len])) 3395 len++; 3396 if (strncmp(cp, subsys, len) == 0) { 3397 freeenv(env); 3398 return (1); 3399 } 3400 cp += len; 3401 } 3402 freeenv(env); 3403 3404 return (0); 3405 } 3406 3407 static void 3408 acpi_lookup(void *arg, const char *name, device_t *dev) 3409 { 3410 ACPI_HANDLE handle; 3411 3412 if (*dev != NULL) 3413 return; 3414 3415 /* 3416 * Allow any handle name that is specified as an absolute path and 3417 * starts with '\'. We could restrict this to \_SB and friends, 3418 * but see acpi_probe_children() for notes on why we scan the entire 3419 * namespace for devices. 3420 * 3421 * XXX: The pathname argument to AcpiGetHandle() should be fixed to 3422 * be const. 3423 */ 3424 if (name[0] != '\\') 3425 return; 3426 if (ACPI_FAILURE(AcpiGetHandle(ACPI_ROOT_OBJECT, __DECONST(char *, name), 3427 &handle))) 3428 return; 3429 *dev = acpi_get_device(handle); 3430 } 3431 3432 /* 3433 * Control interface. 3434 * 3435 * We multiplex ioctls for all participating ACPI devices here. Individual 3436 * drivers wanting to be accessible via /dev/acpi should use the 3437 * register/deregister interface to make their handlers visible. 3438 */ 3439 struct acpi_ioctl_hook 3440 { 3441 TAILQ_ENTRY(acpi_ioctl_hook) link; 3442 u_long cmd; 3443 acpi_ioctl_fn fn; 3444 void *arg; 3445 }; 3446 3447 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 3448 static int acpi_ioctl_hooks_initted; 3449 3450 int 3451 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 3452 { 3453 struct acpi_ioctl_hook *hp; 3454 3455 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 3456 return (ENOMEM); 3457 hp->cmd = cmd; 3458 hp->fn = fn; 3459 hp->arg = arg; 3460 3461 ACPI_LOCK(acpi); 3462 if (acpi_ioctl_hooks_initted == 0) { 3463 TAILQ_INIT(&acpi_ioctl_hooks); 3464 acpi_ioctl_hooks_initted = 1; 3465 } 3466 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 3467 ACPI_UNLOCK(acpi); 3468 3469 return (0); 3470 } 3471 3472 void 3473 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 3474 { 3475 struct acpi_ioctl_hook *hp; 3476 3477 ACPI_LOCK(acpi); 3478 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 3479 if (hp->cmd == cmd && hp->fn == fn) 3480 break; 3481 3482 if (hp != NULL) { 3483 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 3484 free(hp, M_ACPIDEV); 3485 } 3486 ACPI_UNLOCK(acpi); 3487 } 3488 3489 static int 3490 acpiopen(struct cdev *dev, int flag, int fmt, struct thread *td) 3491 { 3492 return (0); 3493 } 3494 3495 static int 3496 acpiclose(struct cdev *dev, int flag, int fmt, struct thread *td) 3497 { 3498 return (0); 3499 } 3500 3501 static int 3502 acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 3503 { 3504 struct acpi_softc *sc; 3505 struct acpi_ioctl_hook *hp; 3506 int error, state; 3507 3508 error = 0; 3509 hp = NULL; 3510 sc = dev->si_drv1; 3511 3512 /* 3513 * Scan the list of registered ioctls, looking for handlers. 3514 */ 3515 ACPI_LOCK(acpi); 3516 if (acpi_ioctl_hooks_initted) 3517 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 3518 if (hp->cmd == cmd) 3519 break; 3520 } 3521 ACPI_UNLOCK(acpi); 3522 if (hp) 3523 return (hp->fn(cmd, addr, hp->arg)); 3524 3525 /* 3526 * Core ioctls are not permitted for non-writable user. 3527 * Currently, other ioctls just fetch information. 3528 * Not changing system behavior. 3529 */ 3530 if ((flag & FWRITE) == 0) 3531 return (EPERM); 3532 3533 /* Core system ioctls. */ 3534 switch (cmd) { 3535 case ACPIIO_REQSLPSTATE: 3536 state = *(int *)addr; 3537 if (state != ACPI_STATE_S5) 3538 return (acpi_ReqSleepState(sc, state)); 3539 device_printf(sc->acpi_dev, "power off via acpi ioctl not supported\n"); 3540 error = EOPNOTSUPP; 3541 break; 3542 case ACPIIO_ACKSLPSTATE: 3543 error = *(int *)addr; 3544 error = acpi_AckSleepState(sc->acpi_clone, error); 3545 break; 3546 case ACPIIO_SETSLPSTATE: /* DEPRECATED */ 3547 state = *(int *)addr; 3548 if (state < ACPI_STATE_S0 || state > ACPI_S_STATES_MAX) 3549 return (EINVAL); 3550 if (!acpi_sleep_states[state]) 3551 return (EOPNOTSUPP); 3552 if (ACPI_FAILURE(acpi_SetSleepState(sc, state))) 3553 error = ENXIO; 3554 break; 3555 default: 3556 error = ENXIO; 3557 break; 3558 } 3559 3560 return (error); 3561 } 3562 3563 static int 3564 acpi_sname2sstate(const char *sname) 3565 { 3566 int sstate; 3567 3568 if (toupper(sname[0]) == 'S') { 3569 sstate = sname[1] - '0'; 3570 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5 && 3571 sname[2] == '\0') 3572 return (sstate); 3573 } else if (strcasecmp(sname, "NONE") == 0) 3574 return (ACPI_STATE_UNKNOWN); 3575 return (-1); 3576 } 3577 3578 static const char * 3579 acpi_sstate2sname(int sstate) 3580 { 3581 static const char *snames[] = { "S0", "S1", "S2", "S3", "S4", "S5" }; 3582 3583 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5) 3584 return (snames[sstate]); 3585 else if (sstate == ACPI_STATE_UNKNOWN) 3586 return ("NONE"); 3587 return (NULL); 3588 } 3589 3590 static int 3591 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3592 { 3593 int error; 3594 struct sbuf sb; 3595 UINT8 state; 3596 3597 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND); 3598 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++) 3599 if (acpi_sleep_states[state]) 3600 sbuf_printf(&sb, "%s ", acpi_sstate2sname(state)); 3601 sbuf_trim(&sb); 3602 sbuf_finish(&sb); 3603 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 3604 sbuf_delete(&sb); 3605 return (error); 3606 } 3607 3608 static int 3609 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3610 { 3611 char sleep_state[10]; 3612 int error, new_state, old_state; 3613 3614 old_state = *(int *)oidp->oid_arg1; 3615 strlcpy(sleep_state, acpi_sstate2sname(old_state), sizeof(sleep_state)); 3616 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 3617 if (error == 0 && req->newptr != NULL) { 3618 new_state = acpi_sname2sstate(sleep_state); 3619 if (new_state < ACPI_STATE_S1) 3620 return (EINVAL); 3621 if (new_state < ACPI_S_STATE_COUNT && !acpi_sleep_states[new_state]) 3622 return (EOPNOTSUPP); 3623 if (new_state != old_state) 3624 *(int *)oidp->oid_arg1 = new_state; 3625 } 3626 return (error); 3627 } 3628 3629 /* Inform devctl(4) when we receive a Notify. */ 3630 void 3631 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 3632 { 3633 char notify_buf[16]; 3634 ACPI_BUFFER handle_buf; 3635 ACPI_STATUS status; 3636 3637 if (subsystem == NULL) 3638 return; 3639 3640 handle_buf.Pointer = NULL; 3641 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 3642 status = AcpiNsHandleToPathname(h, &handle_buf); 3643 if (ACPI_FAILURE(status)) 3644 return; 3645 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 3646 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 3647 AcpiOsFree(handle_buf.Pointer); 3648 } 3649 3650 #ifdef ACPI_DEBUG 3651 /* 3652 * Support for parsing debug options from the kernel environment. 3653 * 3654 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 3655 * by specifying the names of the bits in the debug.acpi.layer and 3656 * debug.acpi.level environment variables. Bits may be unset by 3657 * prefixing the bit name with !. 3658 */ 3659 struct debugtag 3660 { 3661 char *name; 3662 UINT32 value; 3663 }; 3664 3665 static struct debugtag dbg_layer[] = { 3666 {"ACPI_UTILITIES", ACPI_UTILITIES}, 3667 {"ACPI_HARDWARE", ACPI_HARDWARE}, 3668 {"ACPI_EVENTS", ACPI_EVENTS}, 3669 {"ACPI_TABLES", ACPI_TABLES}, 3670 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 3671 {"ACPI_PARSER", ACPI_PARSER}, 3672 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 3673 {"ACPI_EXECUTER", ACPI_EXECUTER}, 3674 {"ACPI_RESOURCES", ACPI_RESOURCES}, 3675 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 3676 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 3677 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 3678 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 3679 3680 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 3681 {"ACPI_BATTERY", ACPI_BATTERY}, 3682 {"ACPI_BUS", ACPI_BUS}, 3683 {"ACPI_BUTTON", ACPI_BUTTON}, 3684 {"ACPI_EC", ACPI_EC}, 3685 {"ACPI_FAN", ACPI_FAN}, 3686 {"ACPI_POWERRES", ACPI_POWERRES}, 3687 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 3688 {"ACPI_THERMAL", ACPI_THERMAL}, 3689 {"ACPI_TIMER", ACPI_TIMER}, 3690 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 3691 {NULL, 0} 3692 }; 3693 3694 static struct debugtag dbg_level[] = { 3695 {"ACPI_LV_INIT", ACPI_LV_INIT}, 3696 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 3697 {"ACPI_LV_INFO", ACPI_LV_INFO}, 3698 {"ACPI_LV_REPAIR", ACPI_LV_REPAIR}, 3699 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 3700 3701 /* Trace verbosity level 1 [Standard Trace Level] */ 3702 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 3703 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 3704 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 3705 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 3706 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 3707 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 3708 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 3709 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 3710 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 3711 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 3712 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 3713 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 3714 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 3715 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 3716 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 3717 3718 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 3719 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 3720 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 3721 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 3722 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 3723 {"ACPI_LV_ALL", ACPI_LV_ALL}, 3724 3725 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 3726 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 3727 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 3728 {"ACPI_LV_IO", ACPI_LV_IO}, 3729 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 3730 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 3731 3732 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 3733 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 3734 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 3735 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 3736 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 3737 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 3738 {NULL, 0} 3739 }; 3740 3741 static void 3742 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 3743 { 3744 char *ep; 3745 int i, l; 3746 int set; 3747 3748 while (*cp) { 3749 if (isspace(*cp)) { 3750 cp++; 3751 continue; 3752 } 3753 ep = cp; 3754 while (*ep && !isspace(*ep)) 3755 ep++; 3756 if (*cp == '!') { 3757 set = 0; 3758 cp++; 3759 if (cp == ep) 3760 continue; 3761 } else { 3762 set = 1; 3763 } 3764 l = ep - cp; 3765 for (i = 0; tag[i].name != NULL; i++) { 3766 if (!strncmp(cp, tag[i].name, l)) { 3767 if (set) 3768 *flag |= tag[i].value; 3769 else 3770 *flag &= ~tag[i].value; 3771 } 3772 } 3773 cp = ep; 3774 } 3775 } 3776 3777 static void 3778 acpi_set_debugging(void *junk) 3779 { 3780 char *layer, *level; 3781 3782 if (cold) { 3783 AcpiDbgLayer = 0; 3784 AcpiDbgLevel = 0; 3785 } 3786 3787 layer = kern_getenv("debug.acpi.layer"); 3788 level = kern_getenv("debug.acpi.level"); 3789 if (layer == NULL && level == NULL) 3790 return; 3791 3792 printf("ACPI set debug"); 3793 if (layer != NULL) { 3794 if (strcmp("NONE", layer) != 0) 3795 printf(" layer '%s'", layer); 3796 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer); 3797 freeenv(layer); 3798 } 3799 if (level != NULL) { 3800 if (strcmp("NONE", level) != 0) 3801 printf(" level '%s'", level); 3802 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel); 3803 freeenv(level); 3804 } 3805 printf("\n"); 3806 } 3807 3808 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 3809 NULL); 3810 3811 static int 3812 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 3813 { 3814 int error, *dbg; 3815 struct debugtag *tag; 3816 struct sbuf sb; 3817 char temp[128]; 3818 3819 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 3820 return (ENOMEM); 3821 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 3822 tag = &dbg_layer[0]; 3823 dbg = &AcpiDbgLayer; 3824 } else { 3825 tag = &dbg_level[0]; 3826 dbg = &AcpiDbgLevel; 3827 } 3828 3829 /* Get old values if this is a get request. */ 3830 ACPI_SERIAL_BEGIN(acpi); 3831 if (*dbg == 0) { 3832 sbuf_cpy(&sb, "NONE"); 3833 } else if (req->newptr == NULL) { 3834 for (; tag->name != NULL; tag++) { 3835 if ((*dbg & tag->value) == tag->value) 3836 sbuf_printf(&sb, "%s ", tag->name); 3837 } 3838 } 3839 sbuf_trim(&sb); 3840 sbuf_finish(&sb); 3841 strlcpy(temp, sbuf_data(&sb), sizeof(temp)); 3842 sbuf_delete(&sb); 3843 3844 error = sysctl_handle_string(oidp, temp, sizeof(temp), req); 3845 3846 /* Check for error or no change */ 3847 if (error == 0 && req->newptr != NULL) { 3848 *dbg = 0; 3849 kern_setenv((char *)oidp->oid_arg1, temp); 3850 acpi_set_debugging(NULL); 3851 } 3852 ACPI_SERIAL_END(acpi); 3853 3854 return (error); 3855 } 3856 3857 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 3858 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 3859 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 3860 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 3861 #endif /* ACPI_DEBUG */ 3862 3863 static int 3864 acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS) 3865 { 3866 int error; 3867 int old; 3868 3869 old = acpi_debug_objects; 3870 error = sysctl_handle_int(oidp, &acpi_debug_objects, 0, req); 3871 if (error != 0 || req->newptr == NULL) 3872 return (error); 3873 if (old == acpi_debug_objects || (old && acpi_debug_objects)) 3874 return (0); 3875 3876 ACPI_SERIAL_BEGIN(acpi); 3877 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE; 3878 ACPI_SERIAL_END(acpi); 3879 3880 return (0); 3881 } 3882 3883 static int 3884 acpi_parse_interfaces(char *str, struct acpi_interface *iface) 3885 { 3886 char *p; 3887 size_t len; 3888 int i, j; 3889 3890 p = str; 3891 while (isspace(*p) || *p == ',') 3892 p++; 3893 len = strlen(p); 3894 if (len == 0) 3895 return (0); 3896 p = strdup(p, M_TEMP); 3897 for (i = 0; i < len; i++) 3898 if (p[i] == ',') 3899 p[i] = '\0'; 3900 i = j = 0; 3901 while (i < len) 3902 if (isspace(p[i]) || p[i] == '\0') 3903 i++; 3904 else { 3905 i += strlen(p + i) + 1; 3906 j++; 3907 } 3908 if (j == 0) { 3909 free(p, M_TEMP); 3910 return (0); 3911 } 3912 iface->data = malloc(sizeof(*iface->data) * j, M_TEMP, M_WAITOK); 3913 iface->num = j; 3914 i = j = 0; 3915 while (i < len) 3916 if (isspace(p[i]) || p[i] == '\0') 3917 i++; 3918 else { 3919 iface->data[j] = p + i; 3920 i += strlen(p + i) + 1; 3921 j++; 3922 } 3923 3924 return (j); 3925 } 3926 3927 static void 3928 acpi_free_interfaces(struct acpi_interface *iface) 3929 { 3930 3931 free(iface->data[0], M_TEMP); 3932 free(iface->data, M_TEMP); 3933 } 3934 3935 static void 3936 acpi_reset_interfaces(device_t dev) 3937 { 3938 struct acpi_interface list; 3939 ACPI_STATUS status; 3940 int i; 3941 3942 if (acpi_parse_interfaces(acpi_install_interface, &list) > 0) { 3943 for (i = 0; i < list.num; i++) { 3944 status = AcpiInstallInterface(list.data[i]); 3945 if (ACPI_FAILURE(status)) 3946 device_printf(dev, 3947 "failed to install _OSI(\"%s\"): %s\n", 3948 list.data[i], AcpiFormatException(status)); 3949 else if (bootverbose) 3950 device_printf(dev, "installed _OSI(\"%s\")\n", 3951 list.data[i]); 3952 } 3953 acpi_free_interfaces(&list); 3954 } 3955 if (acpi_parse_interfaces(acpi_remove_interface, &list) > 0) { 3956 for (i = 0; i < list.num; i++) { 3957 status = AcpiRemoveInterface(list.data[i]); 3958 if (ACPI_FAILURE(status)) 3959 device_printf(dev, 3960 "failed to remove _OSI(\"%s\"): %s\n", 3961 list.data[i], AcpiFormatException(status)); 3962 else if (bootverbose) 3963 device_printf(dev, "removed _OSI(\"%s\")\n", 3964 list.data[i]); 3965 } 3966 acpi_free_interfaces(&list); 3967 } 3968 } 3969 3970 static int 3971 acpi_pm_func(u_long cmd, void *arg, ...) 3972 { 3973 int state, acpi_state; 3974 int error; 3975 struct acpi_softc *sc; 3976 va_list ap; 3977 3978 error = 0; 3979 switch (cmd) { 3980 case POWER_CMD_SUSPEND: 3981 sc = (struct acpi_softc *)arg; 3982 if (sc == NULL) { 3983 error = EINVAL; 3984 goto out; 3985 } 3986 3987 va_start(ap, arg); 3988 state = va_arg(ap, int); 3989 va_end(ap); 3990 3991 switch (state) { 3992 case POWER_SLEEP_STATE_STANDBY: 3993 acpi_state = sc->acpi_standby_sx; 3994 break; 3995 case POWER_SLEEP_STATE_SUSPEND: 3996 acpi_state = sc->acpi_suspend_sx; 3997 break; 3998 case POWER_SLEEP_STATE_HIBERNATE: 3999 acpi_state = ACPI_STATE_S4; 4000 break; 4001 default: 4002 error = EINVAL; 4003 goto out; 4004 } 4005 4006 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state))) 4007 error = ENXIO; 4008 break; 4009 default: 4010 error = EINVAL; 4011 goto out; 4012 } 4013 4014 out: 4015 return (error); 4016 } 4017 4018 static void 4019 acpi_pm_register(void *arg) 4020 { 4021 if (!cold || resource_disabled("acpi", 0)) 4022 return; 4023 4024 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 4025 } 4026 4027 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 4028