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 * Fetch the VM domain for the given device 'dev'. 1075 * 1076 * Return 1 + domain if there's a domain, 0 if not found; 1077 * -1 upon an error. 1078 */ 1079 int 1080 acpi_parse_pxm(device_t dev, int *domain) 1081 { 1082 #if MAXMEMDOM > 1 1083 ACPI_HANDLE h; 1084 int d, pxm; 1085 1086 h = acpi_get_handle(dev); 1087 if ((h != NULL) && 1088 ACPI_SUCCESS(acpi_GetInteger(h, "_PXM", &pxm))) { 1089 d = acpi_map_pxm_to_vm_domainid(pxm); 1090 if (d < 0) 1091 return (-1); 1092 *domain = d; 1093 return (1); 1094 } 1095 #endif 1096 1097 return (0); 1098 } 1099 1100 /* 1101 * Fetch the NUMA domain for the given device. 1102 * 1103 * If a device has a _PXM method, map that to a NUMA domain. 1104 * 1105 * If none is found, then it'll call the parent method. 1106 * If there's no domain, return ENOENT. 1107 */ 1108 int 1109 acpi_get_domain(device_t dev, device_t child, int *domain) 1110 { 1111 int ret; 1112 1113 ret = acpi_parse_pxm(child, domain); 1114 /* Error */ 1115 if (ret == -1) 1116 return (ENOENT); 1117 /* Found */ 1118 if (ret == 1) 1119 return (0); 1120 1121 /* No _PXM node; go up a level */ 1122 return (bus_generic_get_domain(dev, child, domain)); 1123 } 1124 1125 /* 1126 * Pre-allocate/manage all memory and IO resources. Since rman can't handle 1127 * duplicates, we merge any in the sysresource attach routine. 1128 */ 1129 static int 1130 acpi_sysres_alloc(device_t dev) 1131 { 1132 struct resource *res; 1133 struct resource_list *rl; 1134 struct resource_list_entry *rle; 1135 struct rman *rm; 1136 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 1137 device_t *children; 1138 int child_count, i; 1139 1140 /* 1141 * Probe/attach any sysresource devices. This would be unnecessary if we 1142 * had multi-pass probe/attach. 1143 */ 1144 if (device_get_children(dev, &children, &child_count) != 0) 1145 return (ENXIO); 1146 for (i = 0; i < child_count; i++) { 1147 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 1148 device_probe_and_attach(children[i]); 1149 } 1150 free(children, M_TEMP); 1151 1152 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev); 1153 STAILQ_FOREACH(rle, rl, link) { 1154 if (rle->res != NULL) { 1155 device_printf(dev, "duplicate resource for %lx\n", rle->start); 1156 continue; 1157 } 1158 1159 /* Only memory and IO resources are valid here. */ 1160 switch (rle->type) { 1161 case SYS_RES_IOPORT: 1162 rm = &acpi_rman_io; 1163 break; 1164 case SYS_RES_MEMORY: 1165 rm = &acpi_rman_mem; 1166 break; 1167 default: 1168 continue; 1169 } 1170 1171 /* Pre-allocate resource and add to our rman pool. */ 1172 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type, 1173 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 0); 1174 if (res != NULL) { 1175 rman_manage_region(rm, rman_get_start(res), rman_get_end(res)); 1176 rle->res = res; 1177 } else if (bootverbose) 1178 device_printf(dev, "reservation of %lx, %lx (%d) failed\n", 1179 rle->start, rle->count, rle->type); 1180 } 1181 return (0); 1182 } 1183 1184 static char *pcilink_ids[] = { "PNP0C0F", NULL }; 1185 static char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 1186 1187 /* 1188 * Reserve declared resources for devices found during attach once system 1189 * resources have been allocated. 1190 */ 1191 static void 1192 acpi_reserve_resources(device_t dev) 1193 { 1194 struct resource_list_entry *rle; 1195 struct resource_list *rl; 1196 struct acpi_device *ad; 1197 struct acpi_softc *sc; 1198 device_t *children; 1199 int child_count, i; 1200 1201 sc = device_get_softc(dev); 1202 if (device_get_children(dev, &children, &child_count) != 0) 1203 return; 1204 for (i = 0; i < child_count; i++) { 1205 ad = device_get_ivars(children[i]); 1206 rl = &ad->ad_rl; 1207 1208 /* Don't reserve system resources. */ 1209 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 1210 continue; 1211 1212 STAILQ_FOREACH(rle, rl, link) { 1213 /* 1214 * Don't reserve IRQ resources. There are many sticky things 1215 * to get right otherwise (e.g. IRQs for psm, atkbd, and HPET 1216 * when using legacy routing). 1217 */ 1218 if (rle->type == SYS_RES_IRQ) 1219 continue; 1220 1221 /* 1222 * Don't reserve the resource if it is already allocated. 1223 * The acpi_ec(4) driver can allocate its resources early 1224 * if ECDT is present. 1225 */ 1226 if (rle->res != NULL) 1227 continue; 1228 1229 /* 1230 * Try to reserve the resource from our parent. If this 1231 * fails because the resource is a system resource, just 1232 * let it be. The resource range is already reserved so 1233 * that other devices will not use it. If the driver 1234 * needs to allocate the resource, then 1235 * acpi_alloc_resource() will sub-alloc from the system 1236 * resource. 1237 */ 1238 resource_list_reserve(rl, dev, children[i], rle->type, &rle->rid, 1239 rle->start, rle->end, rle->count, 0); 1240 } 1241 } 1242 free(children, M_TEMP); 1243 sc->acpi_resources_reserved = 1; 1244 } 1245 1246 static int 1247 acpi_set_resource(device_t dev, device_t child, int type, int rid, 1248 u_long start, u_long count) 1249 { 1250 struct acpi_softc *sc = device_get_softc(dev); 1251 struct acpi_device *ad = device_get_ivars(child); 1252 struct resource_list *rl = &ad->ad_rl; 1253 ACPI_DEVICE_INFO *devinfo; 1254 u_long end; 1255 1256 /* Ignore IRQ resources for PCI link devices. */ 1257 if (type == SYS_RES_IRQ && ACPI_ID_PROBE(dev, child, pcilink_ids) != NULL) 1258 return (0); 1259 1260 /* 1261 * Ignore most resources for PCI root bridges. Some BIOSes 1262 * incorrectly enumerate the memory ranges they decode as plain 1263 * memory resources instead of as ResourceProducer ranges. Other 1264 * BIOSes incorrectly list system resource entries for I/O ranges 1265 * under the PCI bridge. Do allow the one known-correct case on 1266 * x86 of a PCI bridge claiming the I/O ports used for PCI config 1267 * access. 1268 */ 1269 if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) { 1270 if (ACPI_SUCCESS(AcpiGetObjectInfo(ad->ad_handle, &devinfo))) { 1271 if ((devinfo->Flags & ACPI_PCI_ROOT_BRIDGE) != 0) { 1272 #if defined(__i386__) || defined(__amd64__) 1273 if (!(type == SYS_RES_IOPORT && start == CONF1_ADDR_PORT)) 1274 #endif 1275 { 1276 AcpiOsFree(devinfo); 1277 return (0); 1278 } 1279 } 1280 AcpiOsFree(devinfo); 1281 } 1282 } 1283 1284 /* If the resource is already allocated, fail. */ 1285 if (resource_list_busy(rl, type, rid)) 1286 return (EBUSY); 1287 1288 /* If the resource is already reserved, release it. */ 1289 if (resource_list_reserved(rl, type, rid)) 1290 resource_list_unreserve(rl, dev, child, type, rid); 1291 1292 /* Add the resource. */ 1293 end = (start + count - 1); 1294 resource_list_add(rl, type, rid, start, end, count); 1295 1296 /* Don't reserve resources until the system resources are allocated. */ 1297 if (!sc->acpi_resources_reserved) 1298 return (0); 1299 1300 /* Don't reserve system resources. */ 1301 if (ACPI_ID_PROBE(dev, child, sysres_ids) != NULL) 1302 return (0); 1303 1304 /* 1305 * Don't reserve IRQ resources. There are many sticky things to 1306 * get right otherwise (e.g. IRQs for psm, atkbd, and HPET when 1307 * using legacy routing). 1308 */ 1309 if (type == SYS_RES_IRQ) 1310 return (0); 1311 1312 /* 1313 * Reserve the resource. 1314 * 1315 * XXX: Ignores failure for now. Failure here is probably a 1316 * BIOS/firmware bug? 1317 */ 1318 resource_list_reserve(rl, dev, child, type, &rid, start, end, count, 0); 1319 return (0); 1320 } 1321 1322 static struct resource * 1323 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 1324 u_long start, u_long end, u_long count, u_int flags) 1325 { 1326 ACPI_RESOURCE ares; 1327 struct acpi_device *ad; 1328 struct resource_list_entry *rle; 1329 struct resource_list *rl; 1330 struct resource *res; 1331 int isdefault = (start == 0UL && end == ~0UL); 1332 1333 /* 1334 * First attempt at allocating the resource. For direct children, 1335 * use resource_list_alloc() to handle reserved resources. For 1336 * other devices, pass the request up to our parent. 1337 */ 1338 if (bus == device_get_parent(child)) { 1339 ad = device_get_ivars(child); 1340 rl = &ad->ad_rl; 1341 1342 /* 1343 * Simulate the behavior of the ISA bus for direct children 1344 * devices. That is, if a non-default range is specified for 1345 * a resource that doesn't exist, use bus_set_resource() to 1346 * add the resource before allocating it. Note that these 1347 * resources will not be reserved. 1348 */ 1349 if (!isdefault && resource_list_find(rl, type, *rid) == NULL) 1350 resource_list_add(rl, type, *rid, start, end, count); 1351 res = resource_list_alloc(rl, bus, child, type, rid, start, end, count, 1352 flags); 1353 if (res != NULL && type == SYS_RES_IRQ) { 1354 /* 1355 * Since bus_config_intr() takes immediate effect, we cannot 1356 * configure the interrupt associated with a device when we 1357 * parse the resources but have to defer it until a driver 1358 * actually allocates the interrupt via bus_alloc_resource(). 1359 * 1360 * XXX: Should we handle the lookup failing? 1361 */ 1362 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares))) 1363 acpi_config_intr(child, &ares); 1364 } 1365 1366 /* 1367 * If this is an allocation of the "default" range for a given 1368 * RID, fetch the exact bounds for this resource from the 1369 * resource list entry to try to allocate the range from the 1370 * system resource regions. 1371 */ 1372 if (res == NULL && isdefault) { 1373 rle = resource_list_find(rl, type, *rid); 1374 if (rle != NULL) { 1375 start = rle->start; 1376 end = rle->end; 1377 count = rle->count; 1378 } 1379 } 1380 } else 1381 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid, 1382 start, end, count, flags); 1383 1384 /* 1385 * If the first attempt failed and this is an allocation of a 1386 * specific range, try to satisfy the request via a suballocation 1387 * from our system resource regions. 1388 */ 1389 if (res == NULL && start + count - 1 == end) 1390 res = acpi_alloc_sysres(child, type, rid, start, end, count, flags); 1391 return (res); 1392 } 1393 1394 /* 1395 * Attempt to allocate a specific resource range from the system 1396 * resource ranges. Note that we only handle memory and I/O port 1397 * system resources. 1398 */ 1399 struct resource * 1400 acpi_alloc_sysres(device_t child, int type, int *rid, u_long start, u_long end, 1401 u_long count, u_int flags) 1402 { 1403 struct rman *rm; 1404 struct resource *res; 1405 1406 switch (type) { 1407 case SYS_RES_IOPORT: 1408 rm = &acpi_rman_io; 1409 break; 1410 case SYS_RES_MEMORY: 1411 rm = &acpi_rman_mem; 1412 break; 1413 default: 1414 return (NULL); 1415 } 1416 1417 KASSERT(start + count - 1 == end, ("wildcard resource range")); 1418 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE, 1419 child); 1420 if (res == NULL) 1421 return (NULL); 1422 1423 rman_set_rid(res, *rid); 1424 1425 /* If requested, activate the resource using the parent's method. */ 1426 if (flags & RF_ACTIVE) 1427 if (bus_activate_resource(child, type, *rid, res) != 0) { 1428 rman_release_resource(res); 1429 return (NULL); 1430 } 1431 1432 return (res); 1433 } 1434 1435 static int 1436 acpi_is_resource_managed(int type, struct resource *r) 1437 { 1438 1439 /* We only handle memory and IO resources through rman. */ 1440 switch (type) { 1441 case SYS_RES_IOPORT: 1442 return (rman_is_region_manager(r, &acpi_rman_io)); 1443 case SYS_RES_MEMORY: 1444 return (rman_is_region_manager(r, &acpi_rman_mem)); 1445 } 1446 return (0); 1447 } 1448 1449 static int 1450 acpi_adjust_resource(device_t bus, device_t child, int type, struct resource *r, 1451 u_long start, u_long end) 1452 { 1453 1454 if (acpi_is_resource_managed(type, r)) 1455 return (rman_adjust_resource(r, start, end)); 1456 return (bus_generic_adjust_resource(bus, child, type, r, start, end)); 1457 } 1458 1459 static int 1460 acpi_release_resource(device_t bus, device_t child, int type, int rid, 1461 struct resource *r) 1462 { 1463 int ret; 1464 1465 /* 1466 * If this resource belongs to one of our internal managers, 1467 * deactivate it and release it to the local pool. 1468 */ 1469 if (acpi_is_resource_managed(type, r)) { 1470 if (rman_get_flags(r) & RF_ACTIVE) { 1471 ret = bus_deactivate_resource(child, type, rid, r); 1472 if (ret != 0) 1473 return (ret); 1474 } 1475 return (rman_release_resource(r)); 1476 } 1477 1478 return (bus_generic_rl_release_resource(bus, child, type, rid, r)); 1479 } 1480 1481 static void 1482 acpi_delete_resource(device_t bus, device_t child, int type, int rid) 1483 { 1484 struct resource_list *rl; 1485 1486 rl = acpi_get_rlist(bus, child); 1487 if (resource_list_busy(rl, type, rid)) { 1488 device_printf(bus, "delete_resource: Resource still owned by child" 1489 " (type=%d, rid=%d)\n", type, rid); 1490 return; 1491 } 1492 resource_list_unreserve(rl, bus, child, type, rid); 1493 resource_list_delete(rl, type, rid); 1494 } 1495 1496 /* Allocate an IO port or memory resource, given its GAS. */ 1497 int 1498 acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas, 1499 struct resource **res, u_int flags) 1500 { 1501 int error, res_type; 1502 1503 error = ENOMEM; 1504 if (type == NULL || rid == NULL || gas == NULL || res == NULL) 1505 return (EINVAL); 1506 1507 /* We only support memory and IO spaces. */ 1508 switch (gas->SpaceId) { 1509 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1510 res_type = SYS_RES_MEMORY; 1511 break; 1512 case ACPI_ADR_SPACE_SYSTEM_IO: 1513 res_type = SYS_RES_IOPORT; 1514 break; 1515 default: 1516 return (EOPNOTSUPP); 1517 } 1518 1519 /* 1520 * If the register width is less than 8, assume the BIOS author means 1521 * it is a bit field and just allocate a byte. 1522 */ 1523 if (gas->BitWidth && gas->BitWidth < 8) 1524 gas->BitWidth = 8; 1525 1526 /* Validate the address after we're sure we support the space. */ 1527 if (gas->Address == 0 || gas->BitWidth == 0) 1528 return (EINVAL); 1529 1530 bus_set_resource(dev, res_type, *rid, gas->Address, 1531 gas->BitWidth / 8); 1532 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags); 1533 if (*res != NULL) { 1534 *type = res_type; 1535 error = 0; 1536 } else 1537 bus_delete_resource(dev, res_type, *rid); 1538 1539 return (error); 1540 } 1541 1542 /* Probe _HID and _CID for compatible ISA PNP ids. */ 1543 static uint32_t 1544 acpi_isa_get_logicalid(device_t dev) 1545 { 1546 ACPI_DEVICE_INFO *devinfo; 1547 ACPI_HANDLE h; 1548 uint32_t pnpid; 1549 1550 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1551 1552 /* Fetch and validate the HID. */ 1553 if ((h = acpi_get_handle(dev)) == NULL || 1554 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1555 return_VALUE (0); 1556 1557 pnpid = (devinfo->Valid & ACPI_VALID_HID) != 0 && 1558 devinfo->HardwareId.Length >= ACPI_EISAID_STRING_SIZE ? 1559 PNP_EISAID(devinfo->HardwareId.String) : 0; 1560 AcpiOsFree(devinfo); 1561 1562 return_VALUE (pnpid); 1563 } 1564 1565 static int 1566 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 1567 { 1568 ACPI_DEVICE_INFO *devinfo; 1569 ACPI_PNP_DEVICE_ID *ids; 1570 ACPI_HANDLE h; 1571 uint32_t *pnpid; 1572 int i, valid; 1573 1574 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1575 1576 pnpid = cids; 1577 1578 /* Fetch and validate the CID */ 1579 if ((h = acpi_get_handle(dev)) == NULL || 1580 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1581 return_VALUE (0); 1582 1583 if ((devinfo->Valid & ACPI_VALID_CID) == 0) { 1584 AcpiOsFree(devinfo); 1585 return_VALUE (0); 1586 } 1587 1588 if (devinfo->CompatibleIdList.Count < count) 1589 count = devinfo->CompatibleIdList.Count; 1590 ids = devinfo->CompatibleIdList.Ids; 1591 for (i = 0, valid = 0; i < count; i++) 1592 if (ids[i].Length >= ACPI_EISAID_STRING_SIZE && 1593 strncmp(ids[i].String, "PNP", 3) == 0) { 1594 *pnpid++ = PNP_EISAID(ids[i].String); 1595 valid++; 1596 } 1597 AcpiOsFree(devinfo); 1598 1599 return_VALUE (valid); 1600 } 1601 1602 static char * 1603 acpi_device_id_probe(device_t bus, device_t dev, char **ids) 1604 { 1605 ACPI_HANDLE h; 1606 ACPI_OBJECT_TYPE t; 1607 int i; 1608 1609 h = acpi_get_handle(dev); 1610 if (ids == NULL || h == NULL) 1611 return (NULL); 1612 t = acpi_get_type(dev); 1613 if (t != ACPI_TYPE_DEVICE && t != ACPI_TYPE_PROCESSOR) 1614 return (NULL); 1615 1616 /* Try to match one of the array of IDs with a HID or CID. */ 1617 for (i = 0; ids[i] != NULL; i++) { 1618 if (acpi_MatchHid(h, ids[i])) 1619 return (ids[i]); 1620 } 1621 return (NULL); 1622 } 1623 1624 static ACPI_STATUS 1625 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname, 1626 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret) 1627 { 1628 ACPI_HANDLE h; 1629 1630 if (dev == NULL) 1631 h = ACPI_ROOT_OBJECT; 1632 else if ((h = acpi_get_handle(dev)) == NULL) 1633 return (AE_BAD_PARAMETER); 1634 return (AcpiEvaluateObject(h, pathname, parameters, ret)); 1635 } 1636 1637 int 1638 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate) 1639 { 1640 struct acpi_softc *sc; 1641 ACPI_HANDLE handle; 1642 ACPI_STATUS status; 1643 char sxd[8]; 1644 1645 handle = acpi_get_handle(dev); 1646 1647 /* 1648 * XXX If we find these devices, don't try to power them down. 1649 * The serial and IRDA ports on my T23 hang the system when 1650 * set to D3 and it appears that such legacy devices may 1651 * need special handling in their drivers. 1652 */ 1653 if (dstate == NULL || handle == NULL || 1654 acpi_MatchHid(handle, "PNP0500") || 1655 acpi_MatchHid(handle, "PNP0501") || 1656 acpi_MatchHid(handle, "PNP0502") || 1657 acpi_MatchHid(handle, "PNP0510") || 1658 acpi_MatchHid(handle, "PNP0511")) 1659 return (ENXIO); 1660 1661 /* 1662 * Override next state with the value from _SxD, if present. 1663 * Note illegal _S0D is evaluated because some systems expect this. 1664 */ 1665 sc = device_get_softc(bus); 1666 snprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate); 1667 status = acpi_GetInteger(handle, sxd, dstate); 1668 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { 1669 device_printf(dev, "failed to get %s on %s: %s\n", sxd, 1670 acpi_name(handle), AcpiFormatException(status)); 1671 return (ENXIO); 1672 } 1673 1674 return (0); 1675 } 1676 1677 /* Callback arg for our implementation of walking the namespace. */ 1678 struct acpi_device_scan_ctx { 1679 acpi_scan_cb_t user_fn; 1680 void *arg; 1681 ACPI_HANDLE parent; 1682 }; 1683 1684 static ACPI_STATUS 1685 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval) 1686 { 1687 struct acpi_device_scan_ctx *ctx; 1688 device_t dev, old_dev; 1689 ACPI_STATUS status; 1690 ACPI_OBJECT_TYPE type; 1691 1692 /* 1693 * Skip this device if we think we'll have trouble with it or it is 1694 * the parent where the scan began. 1695 */ 1696 ctx = (struct acpi_device_scan_ctx *)arg; 1697 if (acpi_avoid(h) || h == ctx->parent) 1698 return (AE_OK); 1699 1700 /* If this is not a valid device type (e.g., a method), skip it. */ 1701 if (ACPI_FAILURE(AcpiGetType(h, &type))) 1702 return (AE_OK); 1703 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR && 1704 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER) 1705 return (AE_OK); 1706 1707 /* 1708 * Call the user function with the current device. If it is unchanged 1709 * afterwards, return. Otherwise, we update the handle to the new dev. 1710 */ 1711 old_dev = acpi_get_device(h); 1712 dev = old_dev; 1713 status = ctx->user_fn(h, &dev, level, ctx->arg); 1714 if (ACPI_FAILURE(status) || old_dev == dev) 1715 return (status); 1716 1717 /* Remove the old child and its connection to the handle. */ 1718 if (old_dev != NULL) { 1719 device_delete_child(device_get_parent(old_dev), old_dev); 1720 AcpiDetachData(h, acpi_fake_objhandler); 1721 } 1722 1723 /* Recreate the handle association if the user created a device. */ 1724 if (dev != NULL) 1725 AcpiAttachData(h, acpi_fake_objhandler, dev); 1726 1727 return (AE_OK); 1728 } 1729 1730 static ACPI_STATUS 1731 acpi_device_scan_children(device_t bus, device_t dev, int max_depth, 1732 acpi_scan_cb_t user_fn, void *arg) 1733 { 1734 ACPI_HANDLE h; 1735 struct acpi_device_scan_ctx ctx; 1736 1737 if (acpi_disabled("children")) 1738 return (AE_OK); 1739 1740 if (dev == NULL) 1741 h = ACPI_ROOT_OBJECT; 1742 else if ((h = acpi_get_handle(dev)) == NULL) 1743 return (AE_BAD_PARAMETER); 1744 ctx.user_fn = user_fn; 1745 ctx.arg = arg; 1746 ctx.parent = h; 1747 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth, 1748 acpi_device_scan_cb, NULL, &ctx, NULL)); 1749 } 1750 1751 /* 1752 * Even though ACPI devices are not PCI, we use the PCI approach for setting 1753 * device power states since it's close enough to ACPI. 1754 */ 1755 static int 1756 acpi_set_powerstate(device_t child, int state) 1757 { 1758 ACPI_HANDLE h; 1759 ACPI_STATUS status; 1760 1761 h = acpi_get_handle(child); 1762 if (state < ACPI_STATE_D0 || state > ACPI_D_STATES_MAX) 1763 return (EINVAL); 1764 if (h == NULL) 1765 return (0); 1766 1767 /* Ignore errors if the power methods aren't present. */ 1768 status = acpi_pwr_switch_consumer(h, state); 1769 if (ACPI_SUCCESS(status)) { 1770 if (bootverbose) 1771 device_printf(child, "set ACPI power state D%d on %s\n", 1772 state, acpi_name(h)); 1773 } else if (status != AE_NOT_FOUND) 1774 device_printf(child, 1775 "failed to set ACPI power state D%d on %s: %s\n", state, 1776 acpi_name(h), AcpiFormatException(status)); 1777 1778 return (0); 1779 } 1780 1781 static int 1782 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 1783 { 1784 int result, cid_count, i; 1785 uint32_t lid, cids[8]; 1786 1787 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1788 1789 /* 1790 * ISA-style drivers attached to ACPI may persist and 1791 * probe manually if we return ENOENT. We never want 1792 * that to happen, so don't ever return it. 1793 */ 1794 result = ENXIO; 1795 1796 /* Scan the supplied IDs for a match */ 1797 lid = acpi_isa_get_logicalid(child); 1798 cid_count = acpi_isa_get_compatid(child, cids, 8); 1799 while (ids && ids->ip_id) { 1800 if (lid == ids->ip_id) { 1801 result = 0; 1802 goto out; 1803 } 1804 for (i = 0; i < cid_count; i++) { 1805 if (cids[i] == ids->ip_id) { 1806 result = 0; 1807 goto out; 1808 } 1809 } 1810 ids++; 1811 } 1812 1813 out: 1814 if (result == 0 && ids->ip_desc) 1815 device_set_desc(child, ids->ip_desc); 1816 1817 return_VALUE (result); 1818 } 1819 1820 #if defined(__i386__) || defined(__amd64__) 1821 /* 1822 * Look for a MCFG table. If it is present, use the settings for 1823 * domain (segment) 0 to setup PCI config space access via the memory 1824 * map. 1825 */ 1826 static void 1827 acpi_enable_pcie(void) 1828 { 1829 ACPI_TABLE_HEADER *hdr; 1830 ACPI_MCFG_ALLOCATION *alloc, *end; 1831 ACPI_STATUS status; 1832 1833 status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr); 1834 if (ACPI_FAILURE(status)) 1835 return; 1836 1837 end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length); 1838 alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1); 1839 while (alloc < end) { 1840 if (alloc->PciSegment == 0) { 1841 pcie_cfgregopen(alloc->Address, alloc->StartBusNumber, 1842 alloc->EndBusNumber); 1843 return; 1844 } 1845 alloc++; 1846 } 1847 } 1848 #endif 1849 1850 /* 1851 * Scan all of the ACPI namespace and attach child devices. 1852 * 1853 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and 1854 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec. 1855 * However, in violation of the spec, some systems place their PCI link 1856 * devices in \, so we have to walk the whole namespace. We check the 1857 * type of namespace nodes, so this should be ok. 1858 */ 1859 static void 1860 acpi_probe_children(device_t bus) 1861 { 1862 1863 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1864 1865 /* 1866 * Scan the namespace and insert placeholders for all the devices that 1867 * we find. We also probe/attach any early devices. 1868 * 1869 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1870 * we want to create nodes for all devices, not just those that are 1871 * currently present. (This assumes that we don't want to create/remove 1872 * devices as they appear, which might be smarter.) 1873 */ 1874 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1875 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, acpi_probe_child, 1876 NULL, bus, NULL); 1877 1878 /* Pre-allocate resources for our rman from any sysresource devices. */ 1879 acpi_sysres_alloc(bus); 1880 1881 /* Reserve resources already allocated to children. */ 1882 acpi_reserve_resources(bus); 1883 1884 /* Create any static children by calling device identify methods. */ 1885 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1886 bus_generic_probe(bus); 1887 1888 /* Probe/attach all children, created statically and from the namespace. */ 1889 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "acpi bus_generic_attach\n")); 1890 bus_generic_attach(bus); 1891 1892 /* Attach wake sysctls. */ 1893 acpi_wake_sysctl_walk(bus); 1894 1895 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1896 return_VOID; 1897 } 1898 1899 /* 1900 * Determine the probe order for a given device. 1901 */ 1902 static void 1903 acpi_probe_order(ACPI_HANDLE handle, int *order) 1904 { 1905 ACPI_OBJECT_TYPE type; 1906 1907 /* 1908 * 0. CPUs 1909 * 1. I/O port and memory system resource holders 1910 * 2. Clocks and timers (to handle early accesses) 1911 * 3. Embedded controllers (to handle early accesses) 1912 * 4. PCI Link Devices 1913 */ 1914 AcpiGetType(handle, &type); 1915 if (type == ACPI_TYPE_PROCESSOR) 1916 *order = 0; 1917 else if (acpi_MatchHid(handle, "PNP0C01") || 1918 acpi_MatchHid(handle, "PNP0C02")) 1919 *order = 1; 1920 else if (acpi_MatchHid(handle, "PNP0100") || 1921 acpi_MatchHid(handle, "PNP0103") || 1922 acpi_MatchHid(handle, "PNP0B00")) 1923 *order = 2; 1924 else if (acpi_MatchHid(handle, "PNP0C09")) 1925 *order = 3; 1926 else if (acpi_MatchHid(handle, "PNP0C0F")) 1927 *order = 4; 1928 } 1929 1930 /* 1931 * Evaluate a child device and determine whether we might attach a device to 1932 * it. 1933 */ 1934 static ACPI_STATUS 1935 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1936 { 1937 struct acpi_prw_data prw; 1938 ACPI_OBJECT_TYPE type; 1939 ACPI_HANDLE h; 1940 device_t bus, child; 1941 char *handle_str; 1942 int order; 1943 1944 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1945 1946 if (acpi_disabled("children")) 1947 return_ACPI_STATUS (AE_OK); 1948 1949 /* Skip this device if we think we'll have trouble with it. */ 1950 if (acpi_avoid(handle)) 1951 return_ACPI_STATUS (AE_OK); 1952 1953 bus = (device_t)context; 1954 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1955 handle_str = acpi_name(handle); 1956 switch (type) { 1957 case ACPI_TYPE_DEVICE: 1958 /* 1959 * Since we scan from \, be sure to skip system scope objects. 1960 * \_SB_ and \_TZ_ are defined in ACPICA as devices to work around 1961 * BIOS bugs. For example, \_SB_ is to allow \_SB_._INI to be run 1962 * during the intialization and \_TZ_ is to support Notify() on it. 1963 */ 1964 if (strcmp(handle_str, "\\_SB_") == 0 || 1965 strcmp(handle_str, "\\_TZ_") == 0) 1966 break; 1967 if (acpi_parse_prw(handle, &prw) == 0) 1968 AcpiSetupGpeForWake(handle, prw.gpe_handle, prw.gpe_bit); 1969 1970 /* 1971 * Ignore devices that do not have a _HID or _CID. They should 1972 * be discovered by other buses (e.g. the PCI bus driver). 1973 */ 1974 if (!acpi_has_hid(handle)) 1975 break; 1976 /* FALLTHROUGH */ 1977 case ACPI_TYPE_PROCESSOR: 1978 case ACPI_TYPE_THERMAL: 1979 case ACPI_TYPE_POWER: 1980 /* 1981 * Create a placeholder device for this node. Sort the 1982 * placeholder so that the probe/attach passes will run 1983 * breadth-first. Orders less than ACPI_DEV_BASE_ORDER 1984 * are reserved for special objects (i.e., system 1985 * resources). 1986 */ 1987 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str)); 1988 order = level * 10 + ACPI_DEV_BASE_ORDER; 1989 acpi_probe_order(handle, &order); 1990 child = BUS_ADD_CHILD(bus, order, NULL, -1); 1991 if (child == NULL) 1992 break; 1993 1994 /* Associate the handle with the device_t and vice versa. */ 1995 acpi_set_handle(child, handle); 1996 AcpiAttachData(handle, acpi_fake_objhandler, child); 1997 1998 /* 1999 * Check that the device is present. If it's not present, 2000 * leave it disabled (so that we have a device_t attached to 2001 * the handle, but we don't probe it). 2002 * 2003 * XXX PCI link devices sometimes report "present" but not 2004 * "functional" (i.e. if disabled). Go ahead and probe them 2005 * anyway since we may enable them later. 2006 */ 2007 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 2008 /* Never disable PCI link devices. */ 2009 if (acpi_MatchHid(handle, "PNP0C0F")) 2010 break; 2011 /* 2012 * Docking stations should remain enabled since the system 2013 * may be undocked at boot. 2014 */ 2015 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h))) 2016 break; 2017 2018 device_disable(child); 2019 break; 2020 } 2021 2022 /* 2023 * Get the device's resource settings and attach them. 2024 * Note that if the device has _PRS but no _CRS, we need 2025 * to decide when it's appropriate to try to configure the 2026 * device. Ignore the return value here; it's OK for the 2027 * device not to have any resources. 2028 */ 2029 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 2030 break; 2031 } 2032 } 2033 2034 return_ACPI_STATUS (AE_OK); 2035 } 2036 2037 /* 2038 * AcpiAttachData() requires an object handler but never uses it. This is a 2039 * placeholder object handler so we can store a device_t in an ACPI_HANDLE. 2040 */ 2041 void 2042 acpi_fake_objhandler(ACPI_HANDLE h, void *data) 2043 { 2044 } 2045 2046 static void 2047 acpi_shutdown_final(void *arg, int howto) 2048 { 2049 struct acpi_softc *sc = (struct acpi_softc *)arg; 2050 register_t intr; 2051 ACPI_STATUS status; 2052 2053 /* 2054 * XXX Shutdown code should only run on the BSP (cpuid 0). 2055 * Some chipsets do not power off the system correctly if called from 2056 * an AP. 2057 */ 2058 if ((howto & RB_POWEROFF) != 0) { 2059 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 2060 if (ACPI_FAILURE(status)) { 2061 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2062 AcpiFormatException(status)); 2063 return; 2064 } 2065 device_printf(sc->acpi_dev, "Powering system off\n"); 2066 intr = intr_disable(); 2067 status = AcpiEnterSleepState(ACPI_STATE_S5); 2068 if (ACPI_FAILURE(status)) { 2069 intr_restore(intr); 2070 device_printf(sc->acpi_dev, "power-off failed - %s\n", 2071 AcpiFormatException(status)); 2072 } else { 2073 DELAY(1000000); 2074 intr_restore(intr); 2075 device_printf(sc->acpi_dev, "power-off failed - timeout\n"); 2076 } 2077 } else if ((howto & RB_HALT) == 0 && sc->acpi_handle_reboot) { 2078 /* Reboot using the reset register. */ 2079 status = AcpiReset(); 2080 if (ACPI_SUCCESS(status)) { 2081 DELAY(1000000); 2082 device_printf(sc->acpi_dev, "reset failed - timeout\n"); 2083 } else if (status != AE_NOT_EXIST) 2084 device_printf(sc->acpi_dev, "reset failed - %s\n", 2085 AcpiFormatException(status)); 2086 } else if (sc->acpi_do_disable && panicstr == NULL) { 2087 /* 2088 * Only disable ACPI if the user requested. On some systems, writing 2089 * the disable value to SMI_CMD hangs the system. 2090 */ 2091 device_printf(sc->acpi_dev, "Shutting down\n"); 2092 AcpiTerminate(); 2093 } 2094 } 2095 2096 static void 2097 acpi_enable_fixed_events(struct acpi_softc *sc) 2098 { 2099 static int first_time = 1; 2100 2101 /* Enable and clear fixed events and install handlers. */ 2102 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) { 2103 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 2104 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 2105 acpi_event_power_button_sleep, sc); 2106 if (first_time) 2107 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 2108 } 2109 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) { 2110 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 2111 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 2112 acpi_event_sleep_button_sleep, sc); 2113 if (first_time) 2114 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 2115 } 2116 2117 first_time = 0; 2118 } 2119 2120 /* 2121 * Returns true if the device is actually present and should 2122 * be attached to. This requires the present, enabled, UI-visible 2123 * and diagnostics-passed bits to be set. 2124 */ 2125 BOOLEAN 2126 acpi_DeviceIsPresent(device_t dev) 2127 { 2128 ACPI_DEVICE_INFO *devinfo; 2129 ACPI_HANDLE h; 2130 BOOLEAN present; 2131 2132 if ((h = acpi_get_handle(dev)) == NULL || 2133 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2134 return (FALSE); 2135 2136 /* If no _STA method, must be present */ 2137 present = (devinfo->Valid & ACPI_VALID_STA) == 0 || 2138 ACPI_DEVICE_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE; 2139 2140 AcpiOsFree(devinfo); 2141 return (present); 2142 } 2143 2144 /* 2145 * Returns true if the battery is actually present and inserted. 2146 */ 2147 BOOLEAN 2148 acpi_BatteryIsPresent(device_t dev) 2149 { 2150 ACPI_DEVICE_INFO *devinfo; 2151 ACPI_HANDLE h; 2152 BOOLEAN present; 2153 2154 if ((h = acpi_get_handle(dev)) == NULL || 2155 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2156 return (FALSE); 2157 2158 /* If no _STA method, must be present */ 2159 present = (devinfo->Valid & ACPI_VALID_STA) == 0 || 2160 ACPI_BATTERY_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE; 2161 2162 AcpiOsFree(devinfo); 2163 return (present); 2164 } 2165 2166 /* 2167 * Returns true if a device has at least one valid device ID. 2168 */ 2169 static BOOLEAN 2170 acpi_has_hid(ACPI_HANDLE h) 2171 { 2172 ACPI_DEVICE_INFO *devinfo; 2173 BOOLEAN ret; 2174 2175 if (h == NULL || 2176 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2177 return (FALSE); 2178 2179 ret = FALSE; 2180 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 2181 ret = TRUE; 2182 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) 2183 if (devinfo->CompatibleIdList.Count > 0) 2184 ret = TRUE; 2185 2186 AcpiOsFree(devinfo); 2187 return (ret); 2188 } 2189 2190 /* 2191 * Match a HID string against a handle 2192 */ 2193 BOOLEAN 2194 acpi_MatchHid(ACPI_HANDLE h, const char *hid) 2195 { 2196 ACPI_DEVICE_INFO *devinfo; 2197 BOOLEAN ret; 2198 int i; 2199 2200 if (hid == NULL || h == NULL || 2201 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2202 return (FALSE); 2203 2204 ret = FALSE; 2205 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 2206 strcmp(hid, devinfo->HardwareId.String) == 0) 2207 ret = TRUE; 2208 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) 2209 for (i = 0; i < devinfo->CompatibleIdList.Count; i++) { 2210 if (strcmp(hid, devinfo->CompatibleIdList.Ids[i].String) == 0) { 2211 ret = TRUE; 2212 break; 2213 } 2214 } 2215 2216 AcpiOsFree(devinfo); 2217 return (ret); 2218 } 2219 2220 /* 2221 * Return the handle of a named object within our scope, ie. that of (parent) 2222 * or one if its parents. 2223 */ 2224 ACPI_STATUS 2225 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 2226 { 2227 ACPI_HANDLE r; 2228 ACPI_STATUS status; 2229 2230 /* Walk back up the tree to the root */ 2231 for (;;) { 2232 status = AcpiGetHandle(parent, path, &r); 2233 if (ACPI_SUCCESS(status)) { 2234 *result = r; 2235 return (AE_OK); 2236 } 2237 /* XXX Return error here? */ 2238 if (status != AE_NOT_FOUND) 2239 return (AE_OK); 2240 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 2241 return (AE_NOT_FOUND); 2242 parent = r; 2243 } 2244 } 2245 2246 /* 2247 * Allocate a buffer with a preset data size. 2248 */ 2249 ACPI_BUFFER * 2250 acpi_AllocBuffer(int size) 2251 { 2252 ACPI_BUFFER *buf; 2253 2254 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 2255 return (NULL); 2256 buf->Length = size; 2257 buf->Pointer = (void *)(buf + 1); 2258 return (buf); 2259 } 2260 2261 ACPI_STATUS 2262 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 2263 { 2264 ACPI_OBJECT arg1; 2265 ACPI_OBJECT_LIST args; 2266 2267 arg1.Type = ACPI_TYPE_INTEGER; 2268 arg1.Integer.Value = number; 2269 args.Count = 1; 2270 args.Pointer = &arg1; 2271 2272 return (AcpiEvaluateObject(handle, path, &args, NULL)); 2273 } 2274 2275 /* 2276 * Evaluate a path that should return an integer. 2277 */ 2278 ACPI_STATUS 2279 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 2280 { 2281 ACPI_STATUS status; 2282 ACPI_BUFFER buf; 2283 ACPI_OBJECT param; 2284 2285 if (handle == NULL) 2286 handle = ACPI_ROOT_OBJECT; 2287 2288 /* 2289 * Assume that what we've been pointed at is an Integer object, or 2290 * a method that will return an Integer. 2291 */ 2292 buf.Pointer = ¶m; 2293 buf.Length = sizeof(param); 2294 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2295 if (ACPI_SUCCESS(status)) { 2296 if (param.Type == ACPI_TYPE_INTEGER) 2297 *number = param.Integer.Value; 2298 else 2299 status = AE_TYPE; 2300 } 2301 2302 /* 2303 * In some applications, a method that's expected to return an Integer 2304 * may instead return a Buffer (probably to simplify some internal 2305 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 2306 * convert it into an Integer as best we can. 2307 * 2308 * This is a hack. 2309 */ 2310 if (status == AE_BUFFER_OVERFLOW) { 2311 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 2312 status = AE_NO_MEMORY; 2313 } else { 2314 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2315 if (ACPI_SUCCESS(status)) 2316 status = acpi_ConvertBufferToInteger(&buf, number); 2317 AcpiOsFree(buf.Pointer); 2318 } 2319 } 2320 return (status); 2321 } 2322 2323 ACPI_STATUS 2324 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 2325 { 2326 ACPI_OBJECT *p; 2327 UINT8 *val; 2328 int i; 2329 2330 p = (ACPI_OBJECT *)bufp->Pointer; 2331 if (p->Type == ACPI_TYPE_INTEGER) { 2332 *number = p->Integer.Value; 2333 return (AE_OK); 2334 } 2335 if (p->Type != ACPI_TYPE_BUFFER) 2336 return (AE_TYPE); 2337 if (p->Buffer.Length > sizeof(int)) 2338 return (AE_BAD_DATA); 2339 2340 *number = 0; 2341 val = p->Buffer.Pointer; 2342 for (i = 0; i < p->Buffer.Length; i++) 2343 *number += val[i] << (i * 8); 2344 return (AE_OK); 2345 } 2346 2347 /* 2348 * Iterate over the elements of an a package object, calling the supplied 2349 * function for each element. 2350 * 2351 * XXX possible enhancement might be to abort traversal on error. 2352 */ 2353 ACPI_STATUS 2354 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 2355 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 2356 { 2357 ACPI_OBJECT *comp; 2358 int i; 2359 2360 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 2361 return (AE_BAD_PARAMETER); 2362 2363 /* Iterate over components */ 2364 i = 0; 2365 comp = pkg->Package.Elements; 2366 for (; i < pkg->Package.Count; i++, comp++) 2367 func(comp, arg); 2368 2369 return (AE_OK); 2370 } 2371 2372 /* 2373 * Find the (index)th resource object in a set. 2374 */ 2375 ACPI_STATUS 2376 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 2377 { 2378 ACPI_RESOURCE *rp; 2379 int i; 2380 2381 rp = (ACPI_RESOURCE *)buf->Pointer; 2382 i = index; 2383 while (i-- > 0) { 2384 /* Range check */ 2385 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2386 return (AE_BAD_PARAMETER); 2387 2388 /* Check for terminator */ 2389 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2390 return (AE_NOT_FOUND); 2391 rp = ACPI_NEXT_RESOURCE(rp); 2392 } 2393 if (resp != NULL) 2394 *resp = rp; 2395 2396 return (AE_OK); 2397 } 2398 2399 /* 2400 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 2401 * 2402 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 2403 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 2404 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 2405 * resources. 2406 */ 2407 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 2408 2409 ACPI_STATUS 2410 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 2411 { 2412 ACPI_RESOURCE *rp; 2413 void *newp; 2414 2415 /* Initialise the buffer if necessary. */ 2416 if (buf->Pointer == NULL) { 2417 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 2418 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 2419 return (AE_NO_MEMORY); 2420 rp = (ACPI_RESOURCE *)buf->Pointer; 2421 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2422 rp->Length = ACPI_RS_SIZE_MIN; 2423 } 2424 if (res == NULL) 2425 return (AE_OK); 2426 2427 /* 2428 * Scan the current buffer looking for the terminator. 2429 * This will either find the terminator or hit the end 2430 * of the buffer and return an error. 2431 */ 2432 rp = (ACPI_RESOURCE *)buf->Pointer; 2433 for (;;) { 2434 /* Range check, don't go outside the buffer */ 2435 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2436 return (AE_BAD_PARAMETER); 2437 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2438 break; 2439 rp = ACPI_NEXT_RESOURCE(rp); 2440 } 2441 2442 /* 2443 * Check the size of the buffer and expand if required. 2444 * 2445 * Required size is: 2446 * size of existing resources before terminator + 2447 * size of new resource and header + 2448 * size of terminator. 2449 * 2450 * Note that this loop should really only run once, unless 2451 * for some reason we are stuffing a *really* huge resource. 2452 */ 2453 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 2454 res->Length + ACPI_RS_SIZE_NO_DATA + 2455 ACPI_RS_SIZE_MIN) >= buf->Length) { 2456 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 2457 return (AE_NO_MEMORY); 2458 bcopy(buf->Pointer, newp, buf->Length); 2459 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 2460 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 2461 AcpiOsFree(buf->Pointer); 2462 buf->Pointer = newp; 2463 buf->Length += buf->Length; 2464 } 2465 2466 /* Insert the new resource. */ 2467 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA); 2468 2469 /* And add the terminator. */ 2470 rp = ACPI_NEXT_RESOURCE(rp); 2471 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2472 rp->Length = ACPI_RS_SIZE_MIN; 2473 2474 return (AE_OK); 2475 } 2476 2477 /* 2478 * Set interrupt model. 2479 */ 2480 ACPI_STATUS 2481 acpi_SetIntrModel(int model) 2482 { 2483 2484 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 2485 } 2486 2487 /* 2488 * Walk subtables of a table and call a callback routine for each 2489 * subtable. The caller should provide the first subtable and a 2490 * pointer to the end of the table. This can be used to walk tables 2491 * such as MADT and SRAT that use subtable entries. 2492 */ 2493 void 2494 acpi_walk_subtables(void *first, void *end, acpi_subtable_handler *handler, 2495 void *arg) 2496 { 2497 ACPI_SUBTABLE_HEADER *entry; 2498 2499 for (entry = first; (void *)entry < end; ) { 2500 /* Avoid an infinite loop if we hit a bogus entry. */ 2501 if (entry->Length < sizeof(ACPI_SUBTABLE_HEADER)) 2502 return; 2503 2504 handler(entry, arg); 2505 entry = ACPI_ADD_PTR(ACPI_SUBTABLE_HEADER, entry, entry->Length); 2506 } 2507 } 2508 2509 /* 2510 * DEPRECATED. This interface has serious deficiencies and will be 2511 * removed. 2512 * 2513 * Immediately enter the sleep state. In the old model, acpiconf(8) ran 2514 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this. 2515 */ 2516 ACPI_STATUS 2517 acpi_SetSleepState(struct acpi_softc *sc, int state) 2518 { 2519 static int once; 2520 2521 if (!once) { 2522 device_printf(sc->acpi_dev, 2523 "warning: acpi_SetSleepState() deprecated, need to update your software\n"); 2524 once = 1; 2525 } 2526 return (acpi_EnterSleepState(sc, state)); 2527 } 2528 2529 #if defined(__amd64__) || defined(__i386__) 2530 static void 2531 acpi_sleep_force_task(void *context) 2532 { 2533 struct acpi_softc *sc = (struct acpi_softc *)context; 2534 2535 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2536 device_printf(sc->acpi_dev, "force sleep state S%d failed\n", 2537 sc->acpi_next_sstate); 2538 } 2539 2540 static void 2541 acpi_sleep_force(void *arg) 2542 { 2543 struct acpi_softc *sc = (struct acpi_softc *)arg; 2544 2545 device_printf(sc->acpi_dev, 2546 "suspend request timed out, forcing sleep now\n"); 2547 /* 2548 * XXX Suspending from callout causes freezes in DEVICE_SUSPEND(). 2549 * Suspend from acpi_task thread instead. 2550 */ 2551 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 2552 acpi_sleep_force_task, sc))) 2553 device_printf(sc->acpi_dev, "AcpiOsExecute() for sleeping failed\n"); 2554 } 2555 #endif 2556 2557 /* 2558 * Request that the system enter the given suspend state. All /dev/apm 2559 * devices and devd(8) will be notified. Userland then has a chance to 2560 * save state and acknowledge the request. The system sleeps once all 2561 * acks are in. 2562 */ 2563 int 2564 acpi_ReqSleepState(struct acpi_softc *sc, int state) 2565 { 2566 #if defined(__amd64__) || defined(__i386__) 2567 struct apm_clone_data *clone; 2568 ACPI_STATUS status; 2569 2570 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX) 2571 return (EINVAL); 2572 if (!acpi_sleep_states[state]) 2573 return (EOPNOTSUPP); 2574 2575 /* If a suspend request is already in progress, just return. */ 2576 if (sc->acpi_next_sstate != 0) { 2577 return (0); 2578 } 2579 2580 /* Wait until sleep is enabled. */ 2581 while (sc->acpi_sleep_disabled) { 2582 AcpiOsSleep(1000); 2583 } 2584 2585 ACPI_LOCK(acpi); 2586 2587 sc->acpi_next_sstate = state; 2588 2589 /* S5 (soft-off) should be entered directly with no waiting. */ 2590 if (state == ACPI_STATE_S5) { 2591 ACPI_UNLOCK(acpi); 2592 status = acpi_EnterSleepState(sc, state); 2593 return (ACPI_SUCCESS(status) ? 0 : ENXIO); 2594 } 2595 2596 /* Record the pending state and notify all apm devices. */ 2597 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2598 clone->notify_status = APM_EV_NONE; 2599 if ((clone->flags & ACPI_EVF_DEVD) == 0) { 2600 selwakeuppri(&clone->sel_read, PZERO); 2601 KNOTE_LOCKED(&clone->sel_read.si_note, 0); 2602 } 2603 } 2604 2605 /* If devd(8) is not running, immediately enter the sleep state. */ 2606 if (!devctl_process_running()) { 2607 ACPI_UNLOCK(acpi); 2608 status = acpi_EnterSleepState(sc, state); 2609 return (ACPI_SUCCESS(status) ? 0 : ENXIO); 2610 } 2611 2612 /* 2613 * Set a timeout to fire if userland doesn't ack the suspend request 2614 * in time. This way we still eventually go to sleep if we were 2615 * overheating or running low on battery, even if userland is hung. 2616 * We cancel this timeout once all userland acks are in or the 2617 * suspend request is aborted. 2618 */ 2619 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc); 2620 ACPI_UNLOCK(acpi); 2621 2622 /* Now notify devd(8) also. */ 2623 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state); 2624 2625 return (0); 2626 #else 2627 /* This platform does not support acpi suspend/resume. */ 2628 return (EOPNOTSUPP); 2629 #endif 2630 } 2631 2632 /* 2633 * Acknowledge (or reject) a pending sleep state. The caller has 2634 * prepared for suspend and is now ready for it to proceed. If the 2635 * error argument is non-zero, it indicates suspend should be cancelled 2636 * and gives an errno value describing why. Once all votes are in, 2637 * we suspend the system. 2638 */ 2639 int 2640 acpi_AckSleepState(struct apm_clone_data *clone, int error) 2641 { 2642 #if defined(__amd64__) || defined(__i386__) 2643 struct acpi_softc *sc; 2644 int ret, sleeping; 2645 2646 /* If no pending sleep state, return an error. */ 2647 ACPI_LOCK(acpi); 2648 sc = clone->acpi_sc; 2649 if (sc->acpi_next_sstate == 0) { 2650 ACPI_UNLOCK(acpi); 2651 return (ENXIO); 2652 } 2653 2654 /* Caller wants to abort suspend process. */ 2655 if (error) { 2656 sc->acpi_next_sstate = 0; 2657 callout_stop(&sc->susp_force_to); 2658 device_printf(sc->acpi_dev, 2659 "listener on %s cancelled the pending suspend\n", 2660 devtoname(clone->cdev)); 2661 ACPI_UNLOCK(acpi); 2662 return (0); 2663 } 2664 2665 /* 2666 * Mark this device as acking the suspend request. Then, walk through 2667 * all devices, seeing if they agree yet. We only count devices that 2668 * are writable since read-only devices couldn't ack the request. 2669 */ 2670 sleeping = TRUE; 2671 clone->notify_status = APM_EV_ACKED; 2672 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2673 if ((clone->flags & ACPI_EVF_WRITE) != 0 && 2674 clone->notify_status != APM_EV_ACKED) { 2675 sleeping = FALSE; 2676 break; 2677 } 2678 } 2679 2680 /* If all devices have voted "yes", we will suspend now. */ 2681 if (sleeping) 2682 callout_stop(&sc->susp_force_to); 2683 ACPI_UNLOCK(acpi); 2684 ret = 0; 2685 if (sleeping) { 2686 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2687 ret = ENODEV; 2688 } 2689 return (ret); 2690 #else 2691 /* This platform does not support acpi suspend/resume. */ 2692 return (EOPNOTSUPP); 2693 #endif 2694 } 2695 2696 static void 2697 acpi_sleep_enable(void *arg) 2698 { 2699 struct acpi_softc *sc = (struct acpi_softc *)arg; 2700 2701 ACPI_LOCK_ASSERT(acpi); 2702 2703 /* Reschedule if the system is not fully up and running. */ 2704 if (!AcpiGbl_SystemAwakeAndRunning) { 2705 callout_schedule(&acpi_sleep_timer, hz * ACPI_MINIMUM_AWAKETIME); 2706 return; 2707 } 2708 2709 sc->acpi_sleep_disabled = FALSE; 2710 } 2711 2712 static ACPI_STATUS 2713 acpi_sleep_disable(struct acpi_softc *sc) 2714 { 2715 ACPI_STATUS status; 2716 2717 /* Fail if the system is not fully up and running. */ 2718 if (!AcpiGbl_SystemAwakeAndRunning) 2719 return (AE_ERROR); 2720 2721 ACPI_LOCK(acpi); 2722 status = sc->acpi_sleep_disabled ? AE_ERROR : AE_OK; 2723 sc->acpi_sleep_disabled = TRUE; 2724 ACPI_UNLOCK(acpi); 2725 2726 return (status); 2727 } 2728 2729 enum acpi_sleep_state { 2730 ACPI_SS_NONE, 2731 ACPI_SS_GPE_SET, 2732 ACPI_SS_DEV_SUSPEND, 2733 ACPI_SS_SLP_PREP, 2734 ACPI_SS_SLEPT, 2735 }; 2736 2737 /* 2738 * Enter the desired system sleep state. 2739 * 2740 * Currently we support S1-S5 but S4 is only S4BIOS 2741 */ 2742 static ACPI_STATUS 2743 acpi_EnterSleepState(struct acpi_softc *sc, int state) 2744 { 2745 register_t intr; 2746 ACPI_STATUS status; 2747 ACPI_EVENT_STATUS power_button_status; 2748 enum acpi_sleep_state slp_state; 2749 int sleep_result; 2750 2751 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2752 2753 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX) 2754 return_ACPI_STATUS (AE_BAD_PARAMETER); 2755 if (!acpi_sleep_states[state]) { 2756 device_printf(sc->acpi_dev, "Sleep state S%d not supported by BIOS\n", 2757 state); 2758 return (AE_SUPPORT); 2759 } 2760 2761 /* Re-entry once we're suspending is not allowed. */ 2762 status = acpi_sleep_disable(sc); 2763 if (ACPI_FAILURE(status)) { 2764 device_printf(sc->acpi_dev, 2765 "suspend request ignored (not ready yet)\n"); 2766 return (status); 2767 } 2768 2769 if (state == ACPI_STATE_S5) { 2770 /* 2771 * Shut down cleanly and power off. This will call us back through the 2772 * shutdown handlers. 2773 */ 2774 shutdown_nice(RB_POWEROFF); 2775 return_ACPI_STATUS (AE_OK); 2776 } 2777 2778 EVENTHANDLER_INVOKE(power_suspend_early); 2779 stop_all_proc(); 2780 EVENTHANDLER_INVOKE(power_suspend); 2781 2782 if (smp_started) { 2783 thread_lock(curthread); 2784 sched_bind(curthread, 0); 2785 thread_unlock(curthread); 2786 } 2787 2788 /* 2789 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE 2790 * drivers need this. 2791 */ 2792 mtx_lock(&Giant); 2793 2794 slp_state = ACPI_SS_NONE; 2795 2796 sc->acpi_sstate = state; 2797 2798 /* Enable any GPEs as appropriate and requested by the user. */ 2799 acpi_wake_prep_walk(state); 2800 slp_state = ACPI_SS_GPE_SET; 2801 2802 /* 2803 * Inform all devices that we are going to sleep. If at least one 2804 * device fails, DEVICE_SUSPEND() automatically resumes the tree. 2805 * 2806 * XXX Note that a better two-pass approach with a 'veto' pass 2807 * followed by a "real thing" pass would be better, but the current 2808 * bus interface does not provide for this. 2809 */ 2810 if (DEVICE_SUSPEND(root_bus) != 0) { 2811 device_printf(sc->acpi_dev, "device_suspend failed\n"); 2812 goto backout; 2813 } 2814 slp_state = ACPI_SS_DEV_SUSPEND; 2815 2816 /* If testing device suspend only, back out of everything here. */ 2817 if (acpi_susp_bounce) 2818 goto backout; 2819 2820 status = AcpiEnterSleepStatePrep(state); 2821 if (ACPI_FAILURE(status)) { 2822 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2823 AcpiFormatException(status)); 2824 goto backout; 2825 } 2826 slp_state = ACPI_SS_SLP_PREP; 2827 2828 if (sc->acpi_sleep_delay > 0) 2829 DELAY(sc->acpi_sleep_delay * 1000000); 2830 2831 intr = intr_disable(); 2832 if (state != ACPI_STATE_S1) { 2833 sleep_result = acpi_sleep_machdep(sc, state); 2834 acpi_wakeup_machdep(sc, state, sleep_result, 0); 2835 2836 /* 2837 * XXX According to ACPI specification SCI_EN bit should be restored 2838 * by ACPI platform (BIOS, firmware) to its pre-sleep state. 2839 * Unfortunately some BIOSes fail to do that and that leads to 2840 * unexpected and serious consequences during wake up like a system 2841 * getting stuck in SMI handlers. 2842 * This hack is picked up from Linux, which claims that it follows 2843 * Windows behavior. 2844 */ 2845 if (sleep_result == 1 && state != ACPI_STATE_S4) 2846 AcpiWriteBitRegister(ACPI_BITREG_SCI_ENABLE, ACPI_ENABLE_EVENT); 2847 2848 AcpiLeaveSleepStatePrep(state); 2849 2850 if (sleep_result == 1 && state == ACPI_STATE_S3) { 2851 /* 2852 * Prevent mis-interpretation of the wakeup by power button 2853 * as a request for power off. 2854 * Ideally we should post an appropriate wakeup event, 2855 * perhaps using acpi_event_power_button_wake or alike. 2856 * 2857 * Clearing of power button status after wakeup is mandated 2858 * by ACPI specification in section "Fixed Power Button". 2859 * 2860 * XXX As of ACPICA 20121114 AcpiGetEventStatus provides 2861 * status as 0/1 corressponding to inactive/active despite 2862 * its type being ACPI_EVENT_STATUS. In other words, 2863 * we should not test for ACPI_EVENT_FLAG_SET for time being. 2864 */ 2865 if (ACPI_SUCCESS(AcpiGetEventStatus(ACPI_EVENT_POWER_BUTTON, 2866 &power_button_status)) && power_button_status != 0) { 2867 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 2868 device_printf(sc->acpi_dev, 2869 "cleared fixed power button status\n"); 2870 } 2871 } 2872 2873 intr_restore(intr); 2874 2875 /* call acpi_wakeup_machdep() again with interrupt enabled */ 2876 acpi_wakeup_machdep(sc, state, sleep_result, 1); 2877 2878 if (sleep_result == -1) 2879 goto backout; 2880 2881 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 2882 if (state == ACPI_STATE_S4) 2883 AcpiEnable(); 2884 } else { 2885 status = AcpiEnterSleepState(state); 2886 AcpiLeaveSleepStatePrep(state); 2887 intr_restore(intr); 2888 if (ACPI_FAILURE(status)) { 2889 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 2890 AcpiFormatException(status)); 2891 goto backout; 2892 } 2893 } 2894 slp_state = ACPI_SS_SLEPT; 2895 2896 /* 2897 * Back out state according to how far along we got in the suspend 2898 * process. This handles both the error and success cases. 2899 */ 2900 backout: 2901 if (slp_state >= ACPI_SS_GPE_SET) { 2902 acpi_wake_prep_walk(state); 2903 sc->acpi_sstate = ACPI_STATE_S0; 2904 } 2905 if (slp_state >= ACPI_SS_DEV_SUSPEND) 2906 DEVICE_RESUME(root_bus); 2907 if (slp_state >= ACPI_SS_SLP_PREP) 2908 AcpiLeaveSleepState(state); 2909 if (slp_state >= ACPI_SS_SLEPT) { 2910 acpi_resync_clock(sc); 2911 acpi_enable_fixed_events(sc); 2912 } 2913 sc->acpi_next_sstate = 0; 2914 2915 mtx_unlock(&Giant); 2916 2917 if (smp_started) { 2918 thread_lock(curthread); 2919 sched_unbind(curthread); 2920 thread_unlock(curthread); 2921 } 2922 2923 resume_all_proc(); 2924 2925 EVENTHANDLER_INVOKE(power_resume); 2926 2927 /* Allow another sleep request after a while. */ 2928 callout_schedule(&acpi_sleep_timer, hz * ACPI_MINIMUM_AWAKETIME); 2929 2930 /* Run /etc/rc.resume after we are back. */ 2931 if (devctl_process_running()) 2932 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state); 2933 2934 return_ACPI_STATUS (status); 2935 } 2936 2937 static void 2938 acpi_resync_clock(struct acpi_softc *sc) 2939 { 2940 #ifdef __amd64__ 2941 if (!acpi_reset_clock) 2942 return; 2943 2944 /* 2945 * Warm up timecounter again and reset system clock. 2946 */ 2947 (void)timecounter->tc_get_timecount(timecounter); 2948 (void)timecounter->tc_get_timecount(timecounter); 2949 inittodr(time_second + sc->acpi_sleep_delay); 2950 #endif 2951 } 2952 2953 /* Enable or disable the device's wake GPE. */ 2954 int 2955 acpi_wake_set_enable(device_t dev, int enable) 2956 { 2957 struct acpi_prw_data prw; 2958 ACPI_STATUS status; 2959 int flags; 2960 2961 /* Make sure the device supports waking the system and get the GPE. */ 2962 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 2963 return (ENXIO); 2964 2965 flags = acpi_get_flags(dev); 2966 if (enable) { 2967 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 2968 ACPI_GPE_ENABLE); 2969 if (ACPI_FAILURE(status)) { 2970 device_printf(dev, "enable wake failed\n"); 2971 return (ENXIO); 2972 } 2973 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); 2974 } else { 2975 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 2976 ACPI_GPE_DISABLE); 2977 if (ACPI_FAILURE(status)) { 2978 device_printf(dev, "disable wake failed\n"); 2979 return (ENXIO); 2980 } 2981 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); 2982 } 2983 2984 return (0); 2985 } 2986 2987 static int 2988 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate) 2989 { 2990 struct acpi_prw_data prw; 2991 device_t dev; 2992 2993 /* Check that this is a wake-capable device and get its GPE. */ 2994 if (acpi_parse_prw(handle, &prw) != 0) 2995 return (ENXIO); 2996 dev = acpi_get_device(handle); 2997 2998 /* 2999 * The destination sleep state must be less than (i.e., higher power) 3000 * or equal to the value specified by _PRW. If this GPE cannot be 3001 * enabled for the next sleep state, then disable it. If it can and 3002 * the user requested it be enabled, turn on any required power resources 3003 * and set _PSW. 3004 */ 3005 if (sstate > prw.lowest_wake) { 3006 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_DISABLE); 3007 if (bootverbose) 3008 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n", 3009 acpi_name(handle), sstate); 3010 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) { 3011 acpi_pwr_wake_enable(handle, 1); 3012 acpi_SetInteger(handle, "_PSW", 1); 3013 if (bootverbose) 3014 device_printf(dev, "wake_prep enabled for %s (S%d)\n", 3015 acpi_name(handle), sstate); 3016 } 3017 3018 return (0); 3019 } 3020 3021 static int 3022 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate) 3023 { 3024 struct acpi_prw_data prw; 3025 device_t dev; 3026 3027 /* 3028 * Check that this is a wake-capable device and get its GPE. Return 3029 * now if the user didn't enable this device for wake. 3030 */ 3031 if (acpi_parse_prw(handle, &prw) != 0) 3032 return (ENXIO); 3033 dev = acpi_get_device(handle); 3034 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0) 3035 return (0); 3036 3037 /* 3038 * If this GPE couldn't be enabled for the previous sleep state, it was 3039 * disabled before going to sleep so re-enable it. If it was enabled, 3040 * clear _PSW and turn off any power resources it used. 3041 */ 3042 if (sstate > prw.lowest_wake) { 3043 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_ENABLE); 3044 if (bootverbose) 3045 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle)); 3046 } else { 3047 acpi_SetInteger(handle, "_PSW", 0); 3048 acpi_pwr_wake_enable(handle, 0); 3049 if (bootverbose) 3050 device_printf(dev, "run_prep cleaned up for %s\n", 3051 acpi_name(handle)); 3052 } 3053 3054 return (0); 3055 } 3056 3057 static ACPI_STATUS 3058 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 3059 { 3060 int sstate; 3061 3062 /* If suspending, run the sleep prep function, otherwise wake. */ 3063 sstate = *(int *)context; 3064 if (AcpiGbl_SystemAwakeAndRunning) 3065 acpi_wake_sleep_prep(handle, sstate); 3066 else 3067 acpi_wake_run_prep(handle, sstate); 3068 return (AE_OK); 3069 } 3070 3071 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */ 3072 static int 3073 acpi_wake_prep_walk(int sstate) 3074 { 3075 ACPI_HANDLE sb_handle; 3076 3077 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) 3078 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100, 3079 acpi_wake_prep, NULL, &sstate, NULL); 3080 return (0); 3081 } 3082 3083 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */ 3084 static int 3085 acpi_wake_sysctl_walk(device_t dev) 3086 { 3087 int error, i, numdevs; 3088 device_t *devlist; 3089 device_t child; 3090 ACPI_STATUS status; 3091 3092 error = device_get_children(dev, &devlist, &numdevs); 3093 if (error != 0 || numdevs == 0) { 3094 if (numdevs == 0) 3095 free(devlist, M_TEMP); 3096 return (error); 3097 } 3098 for (i = 0; i < numdevs; i++) { 3099 child = devlist[i]; 3100 acpi_wake_sysctl_walk(child); 3101 if (!device_is_attached(child)) 3102 continue; 3103 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL); 3104 if (ACPI_SUCCESS(status)) { 3105 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child), 3106 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO, 3107 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0, 3108 acpi_wake_set_sysctl, "I", "Device set to wake the system"); 3109 } 3110 } 3111 free(devlist, M_TEMP); 3112 3113 return (0); 3114 } 3115 3116 /* Enable or disable wake from userland. */ 3117 static int 3118 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS) 3119 { 3120 int enable, error; 3121 device_t dev; 3122 3123 dev = (device_t)arg1; 3124 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0; 3125 3126 error = sysctl_handle_int(oidp, &enable, 0, req); 3127 if (error != 0 || req->newptr == NULL) 3128 return (error); 3129 if (enable != 0 && enable != 1) 3130 return (EINVAL); 3131 3132 return (acpi_wake_set_enable(dev, enable)); 3133 } 3134 3135 /* Parse a device's _PRW into a structure. */ 3136 int 3137 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) 3138 { 3139 ACPI_STATUS status; 3140 ACPI_BUFFER prw_buffer; 3141 ACPI_OBJECT *res, *res2; 3142 int error, i, power_count; 3143 3144 if (h == NULL || prw == NULL) 3145 return (EINVAL); 3146 3147 /* 3148 * The _PRW object (7.2.9) is only required for devices that have the 3149 * ability to wake the system from a sleeping state. 3150 */ 3151 error = EINVAL; 3152 prw_buffer.Pointer = NULL; 3153 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 3154 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 3155 if (ACPI_FAILURE(status)) 3156 return (ENOENT); 3157 res = (ACPI_OBJECT *)prw_buffer.Pointer; 3158 if (res == NULL) 3159 return (ENOENT); 3160 if (!ACPI_PKG_VALID(res, 2)) 3161 goto out; 3162 3163 /* 3164 * Element 1 of the _PRW object: 3165 * The lowest power system sleeping state that can be entered while still 3166 * providing wake functionality. The sleeping state being entered must 3167 * be less than (i.e., higher power) or equal to this value. 3168 */ 3169 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) 3170 goto out; 3171 3172 /* 3173 * Element 0 of the _PRW object: 3174 */ 3175 switch (res->Package.Elements[0].Type) { 3176 case ACPI_TYPE_INTEGER: 3177 /* 3178 * If the data type of this package element is numeric, then this 3179 * _PRW package element is the bit index in the GPEx_EN, in the 3180 * GPE blocks described in the FADT, of the enable bit that is 3181 * enabled for the wake event. 3182 */ 3183 prw->gpe_handle = NULL; 3184 prw->gpe_bit = res->Package.Elements[0].Integer.Value; 3185 error = 0; 3186 break; 3187 case ACPI_TYPE_PACKAGE: 3188 /* 3189 * If the data type of this package element is a package, then this 3190 * _PRW package element is itself a package containing two 3191 * elements. The first is an object reference to the GPE Block 3192 * device that contains the GPE that will be triggered by the wake 3193 * event. The second element is numeric and it contains the bit 3194 * index in the GPEx_EN, in the GPE Block referenced by the 3195 * first element in the package, of the enable bit that is enabled for 3196 * the wake event. 3197 * 3198 * For example, if this field is a package then it is of the form: 3199 * Package() {\_SB.PCI0.ISA.GPE, 2} 3200 */ 3201 res2 = &res->Package.Elements[0]; 3202 if (!ACPI_PKG_VALID(res2, 2)) 3203 goto out; 3204 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 3205 if (prw->gpe_handle == NULL) 3206 goto out; 3207 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) 3208 goto out; 3209 error = 0; 3210 break; 3211 default: 3212 goto out; 3213 } 3214 3215 /* Elements 2 to N of the _PRW object are power resources. */ 3216 power_count = res->Package.Count - 2; 3217 if (power_count > ACPI_PRW_MAX_POWERRES) { 3218 printf("ACPI device %s has too many power resources\n", acpi_name(h)); 3219 power_count = 0; 3220 } 3221 prw->power_res_count = power_count; 3222 for (i = 0; i < power_count; i++) 3223 prw->power_res[i] = res->Package.Elements[i]; 3224 3225 out: 3226 if (prw_buffer.Pointer != NULL) 3227 AcpiOsFree(prw_buffer.Pointer); 3228 return (error); 3229 } 3230 3231 /* 3232 * ACPI Event Handlers 3233 */ 3234 3235 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 3236 3237 static void 3238 acpi_system_eventhandler_sleep(void *arg, int state) 3239 { 3240 struct acpi_softc *sc = (struct acpi_softc *)arg; 3241 int ret; 3242 3243 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 3244 3245 /* Check if button action is disabled or unknown. */ 3246 if (state == ACPI_STATE_UNKNOWN) 3247 return; 3248 3249 /* Request that the system prepare to enter the given suspend state. */ 3250 ret = acpi_ReqSleepState(sc, state); 3251 if (ret != 0) 3252 device_printf(sc->acpi_dev, 3253 "request to enter state S%d failed (err %d)\n", state, ret); 3254 3255 return_VOID; 3256 } 3257 3258 static void 3259 acpi_system_eventhandler_wakeup(void *arg, int state) 3260 { 3261 3262 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 3263 3264 /* Currently, nothing to do for wakeup. */ 3265 3266 return_VOID; 3267 } 3268 3269 /* 3270 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 3271 */ 3272 static void 3273 acpi_invoke_sleep_eventhandler(void *context) 3274 { 3275 3276 EVENTHANDLER_INVOKE(acpi_sleep_event, *(int *)context); 3277 } 3278 3279 static void 3280 acpi_invoke_wake_eventhandler(void *context) 3281 { 3282 3283 EVENTHANDLER_INVOKE(acpi_wakeup_event, *(int *)context); 3284 } 3285 3286 UINT32 3287 acpi_event_power_button_sleep(void *context) 3288 { 3289 struct acpi_softc *sc = (struct acpi_softc *)context; 3290 3291 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3292 3293 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3294 acpi_invoke_sleep_eventhandler, &sc->acpi_power_button_sx))) 3295 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3296 return_VALUE (ACPI_INTERRUPT_HANDLED); 3297 } 3298 3299 UINT32 3300 acpi_event_power_button_wake(void *context) 3301 { 3302 struct acpi_softc *sc = (struct acpi_softc *)context; 3303 3304 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3305 3306 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3307 acpi_invoke_wake_eventhandler, &sc->acpi_power_button_sx))) 3308 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3309 return_VALUE (ACPI_INTERRUPT_HANDLED); 3310 } 3311 3312 UINT32 3313 acpi_event_sleep_button_sleep(void *context) 3314 { 3315 struct acpi_softc *sc = (struct acpi_softc *)context; 3316 3317 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3318 3319 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3320 acpi_invoke_sleep_eventhandler, &sc->acpi_sleep_button_sx))) 3321 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3322 return_VALUE (ACPI_INTERRUPT_HANDLED); 3323 } 3324 3325 UINT32 3326 acpi_event_sleep_button_wake(void *context) 3327 { 3328 struct acpi_softc *sc = (struct acpi_softc *)context; 3329 3330 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3331 3332 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3333 acpi_invoke_wake_eventhandler, &sc->acpi_sleep_button_sx))) 3334 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3335 return_VALUE (ACPI_INTERRUPT_HANDLED); 3336 } 3337 3338 /* 3339 * XXX This static buffer is suboptimal. There is no locking so only 3340 * use this for single-threaded callers. 3341 */ 3342 char * 3343 acpi_name(ACPI_HANDLE handle) 3344 { 3345 ACPI_BUFFER buf; 3346 static char data[256]; 3347 3348 buf.Length = sizeof(data); 3349 buf.Pointer = data; 3350 3351 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf))) 3352 return (data); 3353 return ("(unknown)"); 3354 } 3355 3356 /* 3357 * Debugging/bug-avoidance. Avoid trying to fetch info on various 3358 * parts of the namespace. 3359 */ 3360 int 3361 acpi_avoid(ACPI_HANDLE handle) 3362 { 3363 char *cp, *env, *np; 3364 int len; 3365 3366 np = acpi_name(handle); 3367 if (*np == '\\') 3368 np++; 3369 if ((env = kern_getenv("debug.acpi.avoid")) == NULL) 3370 return (0); 3371 3372 /* Scan the avoid list checking for a match */ 3373 cp = env; 3374 for (;;) { 3375 while (*cp != 0 && isspace(*cp)) 3376 cp++; 3377 if (*cp == 0) 3378 break; 3379 len = 0; 3380 while (cp[len] != 0 && !isspace(cp[len])) 3381 len++; 3382 if (!strncmp(cp, np, len)) { 3383 freeenv(env); 3384 return(1); 3385 } 3386 cp += len; 3387 } 3388 freeenv(env); 3389 3390 return (0); 3391 } 3392 3393 /* 3394 * Debugging/bug-avoidance. Disable ACPI subsystem components. 3395 */ 3396 int 3397 acpi_disabled(char *subsys) 3398 { 3399 char *cp, *env; 3400 int len; 3401 3402 if ((env = kern_getenv("debug.acpi.disabled")) == NULL) 3403 return (0); 3404 if (strcmp(env, "all") == 0) { 3405 freeenv(env); 3406 return (1); 3407 } 3408 3409 /* Scan the disable list, checking for a match. */ 3410 cp = env; 3411 for (;;) { 3412 while (*cp != '\0' && isspace(*cp)) 3413 cp++; 3414 if (*cp == '\0') 3415 break; 3416 len = 0; 3417 while (cp[len] != '\0' && !isspace(cp[len])) 3418 len++; 3419 if (strncmp(cp, subsys, len) == 0) { 3420 freeenv(env); 3421 return (1); 3422 } 3423 cp += len; 3424 } 3425 freeenv(env); 3426 3427 return (0); 3428 } 3429 3430 static void 3431 acpi_lookup(void *arg, const char *name, device_t *dev) 3432 { 3433 ACPI_HANDLE handle; 3434 3435 if (*dev != NULL) 3436 return; 3437 3438 /* 3439 * Allow any handle name that is specified as an absolute path and 3440 * starts with '\'. We could restrict this to \_SB and friends, 3441 * but see acpi_probe_children() for notes on why we scan the entire 3442 * namespace for devices. 3443 * 3444 * XXX: The pathname argument to AcpiGetHandle() should be fixed to 3445 * be const. 3446 */ 3447 if (name[0] != '\\') 3448 return; 3449 if (ACPI_FAILURE(AcpiGetHandle(ACPI_ROOT_OBJECT, __DECONST(char *, name), 3450 &handle))) 3451 return; 3452 *dev = acpi_get_device(handle); 3453 } 3454 3455 /* 3456 * Control interface. 3457 * 3458 * We multiplex ioctls for all participating ACPI devices here. Individual 3459 * drivers wanting to be accessible via /dev/acpi should use the 3460 * register/deregister interface to make their handlers visible. 3461 */ 3462 struct acpi_ioctl_hook 3463 { 3464 TAILQ_ENTRY(acpi_ioctl_hook) link; 3465 u_long cmd; 3466 acpi_ioctl_fn fn; 3467 void *arg; 3468 }; 3469 3470 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 3471 static int acpi_ioctl_hooks_initted; 3472 3473 int 3474 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 3475 { 3476 struct acpi_ioctl_hook *hp; 3477 3478 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 3479 return (ENOMEM); 3480 hp->cmd = cmd; 3481 hp->fn = fn; 3482 hp->arg = arg; 3483 3484 ACPI_LOCK(acpi); 3485 if (acpi_ioctl_hooks_initted == 0) { 3486 TAILQ_INIT(&acpi_ioctl_hooks); 3487 acpi_ioctl_hooks_initted = 1; 3488 } 3489 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 3490 ACPI_UNLOCK(acpi); 3491 3492 return (0); 3493 } 3494 3495 void 3496 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 3497 { 3498 struct acpi_ioctl_hook *hp; 3499 3500 ACPI_LOCK(acpi); 3501 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 3502 if (hp->cmd == cmd && hp->fn == fn) 3503 break; 3504 3505 if (hp != NULL) { 3506 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 3507 free(hp, M_ACPIDEV); 3508 } 3509 ACPI_UNLOCK(acpi); 3510 } 3511 3512 static int 3513 acpiopen(struct cdev *dev, int flag, int fmt, struct thread *td) 3514 { 3515 return (0); 3516 } 3517 3518 static int 3519 acpiclose(struct cdev *dev, int flag, int fmt, struct thread *td) 3520 { 3521 return (0); 3522 } 3523 3524 static int 3525 acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 3526 { 3527 struct acpi_softc *sc; 3528 struct acpi_ioctl_hook *hp; 3529 int error, state; 3530 3531 error = 0; 3532 hp = NULL; 3533 sc = dev->si_drv1; 3534 3535 /* 3536 * Scan the list of registered ioctls, looking for handlers. 3537 */ 3538 ACPI_LOCK(acpi); 3539 if (acpi_ioctl_hooks_initted) 3540 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 3541 if (hp->cmd == cmd) 3542 break; 3543 } 3544 ACPI_UNLOCK(acpi); 3545 if (hp) 3546 return (hp->fn(cmd, addr, hp->arg)); 3547 3548 /* 3549 * Core ioctls are not permitted for non-writable user. 3550 * Currently, other ioctls just fetch information. 3551 * Not changing system behavior. 3552 */ 3553 if ((flag & FWRITE) == 0) 3554 return (EPERM); 3555 3556 /* Core system ioctls. */ 3557 switch (cmd) { 3558 case ACPIIO_REQSLPSTATE: 3559 state = *(int *)addr; 3560 if (state != ACPI_STATE_S5) 3561 return (acpi_ReqSleepState(sc, state)); 3562 device_printf(sc->acpi_dev, "power off via acpi ioctl not supported\n"); 3563 error = EOPNOTSUPP; 3564 break; 3565 case ACPIIO_ACKSLPSTATE: 3566 error = *(int *)addr; 3567 error = acpi_AckSleepState(sc->acpi_clone, error); 3568 break; 3569 case ACPIIO_SETSLPSTATE: /* DEPRECATED */ 3570 state = *(int *)addr; 3571 if (state < ACPI_STATE_S0 || state > ACPI_S_STATES_MAX) 3572 return (EINVAL); 3573 if (!acpi_sleep_states[state]) 3574 return (EOPNOTSUPP); 3575 if (ACPI_FAILURE(acpi_SetSleepState(sc, state))) 3576 error = ENXIO; 3577 break; 3578 default: 3579 error = ENXIO; 3580 break; 3581 } 3582 3583 return (error); 3584 } 3585 3586 static int 3587 acpi_sname2sstate(const char *sname) 3588 { 3589 int sstate; 3590 3591 if (toupper(sname[0]) == 'S') { 3592 sstate = sname[1] - '0'; 3593 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5 && 3594 sname[2] == '\0') 3595 return (sstate); 3596 } else if (strcasecmp(sname, "NONE") == 0) 3597 return (ACPI_STATE_UNKNOWN); 3598 return (-1); 3599 } 3600 3601 static const char * 3602 acpi_sstate2sname(int sstate) 3603 { 3604 static const char *snames[] = { "S0", "S1", "S2", "S3", "S4", "S5" }; 3605 3606 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5) 3607 return (snames[sstate]); 3608 else if (sstate == ACPI_STATE_UNKNOWN) 3609 return ("NONE"); 3610 return (NULL); 3611 } 3612 3613 static int 3614 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3615 { 3616 int error; 3617 struct sbuf sb; 3618 UINT8 state; 3619 3620 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND); 3621 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++) 3622 if (acpi_sleep_states[state]) 3623 sbuf_printf(&sb, "%s ", acpi_sstate2sname(state)); 3624 sbuf_trim(&sb); 3625 sbuf_finish(&sb); 3626 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 3627 sbuf_delete(&sb); 3628 return (error); 3629 } 3630 3631 static int 3632 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3633 { 3634 char sleep_state[10]; 3635 int error, new_state, old_state; 3636 3637 old_state = *(int *)oidp->oid_arg1; 3638 strlcpy(sleep_state, acpi_sstate2sname(old_state), sizeof(sleep_state)); 3639 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 3640 if (error == 0 && req->newptr != NULL) { 3641 new_state = acpi_sname2sstate(sleep_state); 3642 if (new_state < ACPI_STATE_S1) 3643 return (EINVAL); 3644 if (new_state < ACPI_S_STATE_COUNT && !acpi_sleep_states[new_state]) 3645 return (EOPNOTSUPP); 3646 if (new_state != old_state) 3647 *(int *)oidp->oid_arg1 = new_state; 3648 } 3649 return (error); 3650 } 3651 3652 /* Inform devctl(4) when we receive a Notify. */ 3653 void 3654 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 3655 { 3656 char notify_buf[16]; 3657 ACPI_BUFFER handle_buf; 3658 ACPI_STATUS status; 3659 3660 if (subsystem == NULL) 3661 return; 3662 3663 handle_buf.Pointer = NULL; 3664 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 3665 status = AcpiNsHandleToPathname(h, &handle_buf); 3666 if (ACPI_FAILURE(status)) 3667 return; 3668 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 3669 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 3670 AcpiOsFree(handle_buf.Pointer); 3671 } 3672 3673 #ifdef ACPI_DEBUG 3674 /* 3675 * Support for parsing debug options from the kernel environment. 3676 * 3677 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 3678 * by specifying the names of the bits in the debug.acpi.layer and 3679 * debug.acpi.level environment variables. Bits may be unset by 3680 * prefixing the bit name with !. 3681 */ 3682 struct debugtag 3683 { 3684 char *name; 3685 UINT32 value; 3686 }; 3687 3688 static struct debugtag dbg_layer[] = { 3689 {"ACPI_UTILITIES", ACPI_UTILITIES}, 3690 {"ACPI_HARDWARE", ACPI_HARDWARE}, 3691 {"ACPI_EVENTS", ACPI_EVENTS}, 3692 {"ACPI_TABLES", ACPI_TABLES}, 3693 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 3694 {"ACPI_PARSER", ACPI_PARSER}, 3695 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 3696 {"ACPI_EXECUTER", ACPI_EXECUTER}, 3697 {"ACPI_RESOURCES", ACPI_RESOURCES}, 3698 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 3699 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 3700 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 3701 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 3702 3703 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 3704 {"ACPI_BATTERY", ACPI_BATTERY}, 3705 {"ACPI_BUS", ACPI_BUS}, 3706 {"ACPI_BUTTON", ACPI_BUTTON}, 3707 {"ACPI_EC", ACPI_EC}, 3708 {"ACPI_FAN", ACPI_FAN}, 3709 {"ACPI_POWERRES", ACPI_POWERRES}, 3710 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 3711 {"ACPI_THERMAL", ACPI_THERMAL}, 3712 {"ACPI_TIMER", ACPI_TIMER}, 3713 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 3714 {NULL, 0} 3715 }; 3716 3717 static struct debugtag dbg_level[] = { 3718 {"ACPI_LV_INIT", ACPI_LV_INIT}, 3719 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 3720 {"ACPI_LV_INFO", ACPI_LV_INFO}, 3721 {"ACPI_LV_REPAIR", ACPI_LV_REPAIR}, 3722 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 3723 3724 /* Trace verbosity level 1 [Standard Trace Level] */ 3725 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 3726 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 3727 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 3728 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 3729 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 3730 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 3731 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 3732 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 3733 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 3734 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 3735 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 3736 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 3737 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 3738 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 3739 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 3740 3741 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 3742 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 3743 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 3744 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 3745 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 3746 {"ACPI_LV_ALL", ACPI_LV_ALL}, 3747 3748 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 3749 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 3750 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 3751 {"ACPI_LV_IO", ACPI_LV_IO}, 3752 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 3753 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 3754 3755 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 3756 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 3757 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 3758 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 3759 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 3760 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 3761 {NULL, 0} 3762 }; 3763 3764 static void 3765 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 3766 { 3767 char *ep; 3768 int i, l; 3769 int set; 3770 3771 while (*cp) { 3772 if (isspace(*cp)) { 3773 cp++; 3774 continue; 3775 } 3776 ep = cp; 3777 while (*ep && !isspace(*ep)) 3778 ep++; 3779 if (*cp == '!') { 3780 set = 0; 3781 cp++; 3782 if (cp == ep) 3783 continue; 3784 } else { 3785 set = 1; 3786 } 3787 l = ep - cp; 3788 for (i = 0; tag[i].name != NULL; i++) { 3789 if (!strncmp(cp, tag[i].name, l)) { 3790 if (set) 3791 *flag |= tag[i].value; 3792 else 3793 *flag &= ~tag[i].value; 3794 } 3795 } 3796 cp = ep; 3797 } 3798 } 3799 3800 static void 3801 acpi_set_debugging(void *junk) 3802 { 3803 char *layer, *level; 3804 3805 if (cold) { 3806 AcpiDbgLayer = 0; 3807 AcpiDbgLevel = 0; 3808 } 3809 3810 layer = kern_getenv("debug.acpi.layer"); 3811 level = kern_getenv("debug.acpi.level"); 3812 if (layer == NULL && level == NULL) 3813 return; 3814 3815 printf("ACPI set debug"); 3816 if (layer != NULL) { 3817 if (strcmp("NONE", layer) != 0) 3818 printf(" layer '%s'", layer); 3819 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer); 3820 freeenv(layer); 3821 } 3822 if (level != NULL) { 3823 if (strcmp("NONE", level) != 0) 3824 printf(" level '%s'", level); 3825 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel); 3826 freeenv(level); 3827 } 3828 printf("\n"); 3829 } 3830 3831 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 3832 NULL); 3833 3834 static int 3835 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 3836 { 3837 int error, *dbg; 3838 struct debugtag *tag; 3839 struct sbuf sb; 3840 char temp[128]; 3841 3842 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 3843 return (ENOMEM); 3844 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 3845 tag = &dbg_layer[0]; 3846 dbg = &AcpiDbgLayer; 3847 } else { 3848 tag = &dbg_level[0]; 3849 dbg = &AcpiDbgLevel; 3850 } 3851 3852 /* Get old values if this is a get request. */ 3853 ACPI_SERIAL_BEGIN(acpi); 3854 if (*dbg == 0) { 3855 sbuf_cpy(&sb, "NONE"); 3856 } else if (req->newptr == NULL) { 3857 for (; tag->name != NULL; tag++) { 3858 if ((*dbg & tag->value) == tag->value) 3859 sbuf_printf(&sb, "%s ", tag->name); 3860 } 3861 } 3862 sbuf_trim(&sb); 3863 sbuf_finish(&sb); 3864 strlcpy(temp, sbuf_data(&sb), sizeof(temp)); 3865 sbuf_delete(&sb); 3866 3867 error = sysctl_handle_string(oidp, temp, sizeof(temp), req); 3868 3869 /* Check for error or no change */ 3870 if (error == 0 && req->newptr != NULL) { 3871 *dbg = 0; 3872 kern_setenv((char *)oidp->oid_arg1, temp); 3873 acpi_set_debugging(NULL); 3874 } 3875 ACPI_SERIAL_END(acpi); 3876 3877 return (error); 3878 } 3879 3880 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 3881 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 3882 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 3883 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 3884 #endif /* ACPI_DEBUG */ 3885 3886 static int 3887 acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS) 3888 { 3889 int error; 3890 int old; 3891 3892 old = acpi_debug_objects; 3893 error = sysctl_handle_int(oidp, &acpi_debug_objects, 0, req); 3894 if (error != 0 || req->newptr == NULL) 3895 return (error); 3896 if (old == acpi_debug_objects || (old && acpi_debug_objects)) 3897 return (0); 3898 3899 ACPI_SERIAL_BEGIN(acpi); 3900 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE; 3901 ACPI_SERIAL_END(acpi); 3902 3903 return (0); 3904 } 3905 3906 static int 3907 acpi_parse_interfaces(char *str, struct acpi_interface *iface) 3908 { 3909 char *p; 3910 size_t len; 3911 int i, j; 3912 3913 p = str; 3914 while (isspace(*p) || *p == ',') 3915 p++; 3916 len = strlen(p); 3917 if (len == 0) 3918 return (0); 3919 p = strdup(p, M_TEMP); 3920 for (i = 0; i < len; i++) 3921 if (p[i] == ',') 3922 p[i] = '\0'; 3923 i = j = 0; 3924 while (i < len) 3925 if (isspace(p[i]) || p[i] == '\0') 3926 i++; 3927 else { 3928 i += strlen(p + i) + 1; 3929 j++; 3930 } 3931 if (j == 0) { 3932 free(p, M_TEMP); 3933 return (0); 3934 } 3935 iface->data = malloc(sizeof(*iface->data) * j, M_TEMP, M_WAITOK); 3936 iface->num = j; 3937 i = j = 0; 3938 while (i < len) 3939 if (isspace(p[i]) || p[i] == '\0') 3940 i++; 3941 else { 3942 iface->data[j] = p + i; 3943 i += strlen(p + i) + 1; 3944 j++; 3945 } 3946 3947 return (j); 3948 } 3949 3950 static void 3951 acpi_free_interfaces(struct acpi_interface *iface) 3952 { 3953 3954 free(iface->data[0], M_TEMP); 3955 free(iface->data, M_TEMP); 3956 } 3957 3958 static void 3959 acpi_reset_interfaces(device_t dev) 3960 { 3961 struct acpi_interface list; 3962 ACPI_STATUS status; 3963 int i; 3964 3965 if (acpi_parse_interfaces(acpi_install_interface, &list) > 0) { 3966 for (i = 0; i < list.num; i++) { 3967 status = AcpiInstallInterface(list.data[i]); 3968 if (ACPI_FAILURE(status)) 3969 device_printf(dev, 3970 "failed to install _OSI(\"%s\"): %s\n", 3971 list.data[i], AcpiFormatException(status)); 3972 else if (bootverbose) 3973 device_printf(dev, "installed _OSI(\"%s\")\n", 3974 list.data[i]); 3975 } 3976 acpi_free_interfaces(&list); 3977 } 3978 if (acpi_parse_interfaces(acpi_remove_interface, &list) > 0) { 3979 for (i = 0; i < list.num; i++) { 3980 status = AcpiRemoveInterface(list.data[i]); 3981 if (ACPI_FAILURE(status)) 3982 device_printf(dev, 3983 "failed to remove _OSI(\"%s\"): %s\n", 3984 list.data[i], AcpiFormatException(status)); 3985 else if (bootverbose) 3986 device_printf(dev, "removed _OSI(\"%s\")\n", 3987 list.data[i]); 3988 } 3989 acpi_free_interfaces(&list); 3990 } 3991 } 3992 3993 static int 3994 acpi_pm_func(u_long cmd, void *arg, ...) 3995 { 3996 int state, acpi_state; 3997 int error; 3998 struct acpi_softc *sc; 3999 va_list ap; 4000 4001 error = 0; 4002 switch (cmd) { 4003 case POWER_CMD_SUSPEND: 4004 sc = (struct acpi_softc *)arg; 4005 if (sc == NULL) { 4006 error = EINVAL; 4007 goto out; 4008 } 4009 4010 va_start(ap, arg); 4011 state = va_arg(ap, int); 4012 va_end(ap); 4013 4014 switch (state) { 4015 case POWER_SLEEP_STATE_STANDBY: 4016 acpi_state = sc->acpi_standby_sx; 4017 break; 4018 case POWER_SLEEP_STATE_SUSPEND: 4019 acpi_state = sc->acpi_suspend_sx; 4020 break; 4021 case POWER_SLEEP_STATE_HIBERNATE: 4022 acpi_state = ACPI_STATE_S4; 4023 break; 4024 default: 4025 error = EINVAL; 4026 goto out; 4027 } 4028 4029 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state))) 4030 error = ENXIO; 4031 break; 4032 default: 4033 error = EINVAL; 4034 goto out; 4035 } 4036 4037 out: 4038 return (error); 4039 } 4040 4041 static void 4042 acpi_pm_register(void *arg) 4043 { 4044 if (!cold || resource_disabled("acpi", 0)) 4045 return; 4046 4047 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 4048 } 4049 4050 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 4051