acpi.c revision 340145
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: stable/11/sys/dev/acpica/acpi.c 340145 2018-11-04 23:28:56Z mmacy $"); 32 33#include "opt_acpi.h" 34#include "opt_device_numa.h" 35 36#include <sys/param.h> 37#include <sys/kernel.h> 38#include <sys/proc.h> 39#include <sys/fcntl.h> 40#include <sys/malloc.h> 41#include <sys/module.h> 42#include <sys/bus.h> 43#include <sys/conf.h> 44#include <sys/ioccom.h> 45#include <sys/reboot.h> 46#include <sys/sysctl.h> 47#include <sys/ctype.h> 48#include <sys/linker.h> 49#include <sys/power.h> 50#include <sys/sbuf.h> 51#include <sys/sched.h> 52#include <sys/smp.h> 53#include <sys/timetc.h> 54 55#if defined(__i386__) || defined(__amd64__) 56#include <machine/clock.h> 57#include <machine/pci_cfgreg.h> 58#endif 59#include <machine/resource.h> 60#include <machine/bus.h> 61#include <sys/rman.h> 62#include <isa/isavar.h> 63#include <isa/pnpvar.h> 64 65#include <contrib/dev/acpica/include/acpi.h> 66#include <contrib/dev/acpica/include/accommon.h> 67#include <contrib/dev/acpica/include/acnamesp.h> 68 69#include <dev/acpica/acpivar.h> 70#include <dev/acpica/acpiio.h> 71 72#include <vm/vm_param.h> 73 74static MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 75 76/* Hooks for the ACPI CA debugging infrastructure */ 77#define _COMPONENT ACPI_BUS 78ACPI_MODULE_NAME("ACPI") 79 80static d_open_t acpiopen; 81static d_close_t acpiclose; 82static d_ioctl_t acpiioctl; 83 84static struct cdevsw acpi_cdevsw = { 85 .d_version = D_VERSION, 86 .d_open = acpiopen, 87 .d_close = acpiclose, 88 .d_ioctl = acpiioctl, 89 .d_name = "acpi", 90}; 91 92struct acpi_interface { 93 ACPI_STRING *data; 94 int num; 95}; 96 97/* Global mutex for locking access to the ACPI subsystem. */ 98struct mtx acpi_mutex; 99struct callout acpi_sleep_timer; 100 101/* Bitmap of device quirks. */ 102int acpi_quirks; 103 104/* Supported sleep states. */ 105static BOOLEAN acpi_sleep_states[ACPI_S_STATE_COUNT]; 106 107static void acpi_lookup(void *arg, const char *name, device_t *dev); 108static int acpi_modevent(struct module *mod, int event, void *junk); 109static int acpi_probe(device_t dev); 110static int acpi_attach(device_t dev); 111static int acpi_suspend(device_t dev); 112static int acpi_resume(device_t dev); 113static int acpi_shutdown(device_t dev); 114static device_t acpi_add_child(device_t bus, u_int order, const char *name, 115 int unit); 116static int acpi_print_child(device_t bus, device_t child); 117static void acpi_probe_nomatch(device_t bus, device_t child); 118static void acpi_driver_added(device_t dev, driver_t *driver); 119static int acpi_read_ivar(device_t dev, device_t child, int index, 120 uintptr_t *result); 121static int acpi_write_ivar(device_t dev, device_t child, int index, 122 uintptr_t value); 123static struct resource_list *acpi_get_rlist(device_t dev, device_t child); 124static void acpi_reserve_resources(device_t dev); 125static int acpi_sysres_alloc(device_t dev); 126static int acpi_set_resource(device_t dev, device_t child, int type, 127 int rid, rman_res_t start, rman_res_t count); 128static struct resource *acpi_alloc_resource(device_t bus, device_t child, 129 int type, int *rid, rman_res_t start, rman_res_t end, 130 rman_res_t count, u_int flags); 131static int acpi_adjust_resource(device_t bus, device_t child, int type, 132 struct resource *r, rman_res_t start, rman_res_t end); 133static int acpi_release_resource(device_t bus, device_t child, int type, 134 int rid, struct resource *r); 135static void acpi_delete_resource(device_t bus, device_t child, int type, 136 int rid); 137static uint32_t acpi_isa_get_logicalid(device_t dev); 138static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count); 139static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids); 140static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev, 141 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters, 142 ACPI_BUFFER *ret); 143static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, 144 void *context, void **retval); 145static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev, 146 int max_depth, acpi_scan_cb_t user_fn, void *arg); 147static int acpi_set_powerstate(device_t child, int state); 148static int acpi_isa_pnp_probe(device_t bus, device_t child, 149 struct isa_pnp_id *ids); 150static void acpi_probe_children(device_t bus); 151static void acpi_probe_order(ACPI_HANDLE handle, int *order); 152static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, 153 void *context, void **status); 154static void acpi_sleep_enable(void *arg); 155static ACPI_STATUS acpi_sleep_disable(struct acpi_softc *sc); 156static ACPI_STATUS acpi_EnterSleepState(struct acpi_softc *sc, int state); 157static void acpi_shutdown_final(void *arg, int howto); 158static void acpi_enable_fixed_events(struct acpi_softc *sc); 159static BOOLEAN acpi_has_hid(ACPI_HANDLE handle); 160static void acpi_resync_clock(struct acpi_softc *sc); 161static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate); 162static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate); 163static int acpi_wake_prep_walk(int sstate); 164static int acpi_wake_sysctl_walk(device_t dev); 165static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS); 166static void acpi_system_eventhandler_sleep(void *arg, int state); 167static void acpi_system_eventhandler_wakeup(void *arg, int state); 168static int acpi_sname2sstate(const char *sname); 169static const char *acpi_sstate2sname(int sstate); 170static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 171static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 172static int acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS); 173static int acpi_pm_func(u_long cmd, void *arg, ...); 174static int acpi_child_location_str_method(device_t acdev, device_t child, 175 char *buf, size_t buflen); 176static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child, 177 char *buf, size_t buflen); 178#if defined(__i386__) || defined(__amd64__) 179static void acpi_enable_pcie(void); 180#endif 181static void acpi_hint_device_unit(device_t acdev, device_t child, 182 const char *name, int *unitp); 183static void acpi_reset_interfaces(device_t dev); 184 185static device_method_t acpi_methods[] = { 186 /* Device interface */ 187 DEVMETHOD(device_probe, acpi_probe), 188 DEVMETHOD(device_attach, acpi_attach), 189 DEVMETHOD(device_shutdown, acpi_shutdown), 190 DEVMETHOD(device_detach, bus_generic_detach), 191 DEVMETHOD(device_suspend, acpi_suspend), 192 DEVMETHOD(device_resume, acpi_resume), 193 194 /* Bus interface */ 195 DEVMETHOD(bus_add_child, acpi_add_child), 196 DEVMETHOD(bus_print_child, acpi_print_child), 197 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch), 198 DEVMETHOD(bus_driver_added, acpi_driver_added), 199 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 200 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 201 DEVMETHOD(bus_get_resource_list, acpi_get_rlist), 202 DEVMETHOD(bus_set_resource, acpi_set_resource), 203 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 204 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 205 DEVMETHOD(bus_adjust_resource, acpi_adjust_resource), 206 DEVMETHOD(bus_release_resource, acpi_release_resource), 207 DEVMETHOD(bus_delete_resource, acpi_delete_resource), 208 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method), 209 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method), 210 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 211 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 212 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 213 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 214 DEVMETHOD(bus_hint_device_unit, acpi_hint_device_unit), 215 DEVMETHOD(bus_get_cpus, acpi_get_cpus), 216 DEVMETHOD(bus_get_domain, acpi_get_domain), 217 218 /* ACPI bus */ 219 DEVMETHOD(acpi_id_probe, acpi_device_id_probe), 220 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj), 221 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep), 222 DEVMETHOD(acpi_scan_children, acpi_device_scan_children), 223 224 /* ISA emulation */ 225 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 226 227 DEVMETHOD_END 228}; 229 230static driver_t acpi_driver = { 231 "acpi", 232 acpi_methods, 233 sizeof(struct acpi_softc), 234}; 235 236static devclass_t acpi_devclass; 237DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0); 238MODULE_VERSION(acpi, 1); 239 240ACPI_SERIAL_DECL(acpi, "ACPI root bus"); 241 242/* Local pools for managing system resources for ACPI child devices. */ 243static struct rman acpi_rman_io, acpi_rman_mem; 244 245#define ACPI_MINIMUM_AWAKETIME 5 246 247/* Holds the description of the acpi0 device. */ 248static char acpi_desc[ACPI_OEM_ID_SIZE + ACPI_OEM_TABLE_ID_SIZE + 2]; 249 250SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging"); 251static char acpi_ca_version[12]; 252SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, 253 acpi_ca_version, 0, "Version of Intel ACPI-CA"); 254 255/* 256 * Allow overriding _OSI methods. 257 */ 258static char acpi_install_interface[256]; 259TUNABLE_STR("hw.acpi.install_interface", acpi_install_interface, 260 sizeof(acpi_install_interface)); 261static char acpi_remove_interface[256]; 262TUNABLE_STR("hw.acpi.remove_interface", acpi_remove_interface, 263 sizeof(acpi_remove_interface)); 264 265/* Allow users to dump Debug objects without ACPI debugger. */ 266static int acpi_debug_objects; 267TUNABLE_INT("debug.acpi.enable_debug_objects", &acpi_debug_objects); 268SYSCTL_PROC(_debug_acpi, OID_AUTO, enable_debug_objects, 269 CTLFLAG_RW | CTLTYPE_INT, NULL, 0, acpi_debug_objects_sysctl, "I", 270 "Enable Debug objects"); 271 272/* Allow the interpreter to ignore common mistakes in BIOS. */ 273static int acpi_interpreter_slack = 1; 274TUNABLE_INT("debug.acpi.interpreter_slack", &acpi_interpreter_slack); 275SYSCTL_INT(_debug_acpi, OID_AUTO, interpreter_slack, CTLFLAG_RDTUN, 276 &acpi_interpreter_slack, 1, "Turn on interpreter slack mode."); 277 278/* Ignore register widths set by FADT and use default widths instead. */ 279static int acpi_ignore_reg_width = 1; 280TUNABLE_INT("debug.acpi.default_register_width", &acpi_ignore_reg_width); 281SYSCTL_INT(_debug_acpi, OID_AUTO, default_register_width, CTLFLAG_RDTUN, 282 &acpi_ignore_reg_width, 1, "Ignore register widths set by FADT"); 283 284#ifdef __amd64__ 285/* Reset system clock while resuming. XXX Remove once tested. */ 286static int acpi_reset_clock = 1; 287TUNABLE_INT("debug.acpi.reset_clock", &acpi_reset_clock); 288SYSCTL_INT(_debug_acpi, OID_AUTO, reset_clock, CTLFLAG_RW, 289 &acpi_reset_clock, 1, "Reset system clock while resuming."); 290#endif 291 292/* Allow users to override quirks. */ 293TUNABLE_INT("debug.acpi.quirks", &acpi_quirks); 294 295int acpi_susp_bounce; 296SYSCTL_INT(_debug_acpi, OID_AUTO, suspend_bounce, CTLFLAG_RW, 297 &acpi_susp_bounce, 0, "Don't actually suspend, just test devices."); 298 299/* 300 * ACPI can only be loaded as a module by the loader; activating it after 301 * system bootstrap time is not useful, and can be fatal to the system. 302 * It also cannot be unloaded, since the entire system bus hierarchy hangs 303 * off it. 304 */ 305static int 306acpi_modevent(struct module *mod, int event, void *junk) 307{ 308 switch (event) { 309 case MOD_LOAD: 310 if (!cold) { 311 printf("The ACPI driver cannot be loaded after boot.\n"); 312 return (EPERM); 313 } 314 break; 315 case MOD_UNLOAD: 316 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 317 return (EBUSY); 318 break; 319 default: 320 break; 321 } 322 return (0); 323} 324 325/* 326 * Perform early initialization. 327 */ 328ACPI_STATUS 329acpi_Startup(void) 330{ 331 static int started = 0; 332 ACPI_STATUS status; 333 int val; 334 335 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 336 337 /* Only run the startup code once. The MADT driver also calls this. */ 338 if (started) 339 return_VALUE (AE_OK); 340 started = 1; 341 342 /* 343 * Initialize the ACPICA subsystem. 344 */ 345 if (ACPI_FAILURE(status = AcpiInitializeSubsystem())) { 346 printf("ACPI: Could not initialize Subsystem: %s\n", 347 AcpiFormatException(status)); 348 return_VALUE (status); 349 } 350 351 /* 352 * Pre-allocate space for RSDT/XSDT and DSDT tables and allow resizing 353 * if more tables exist. 354 */ 355 if (ACPI_FAILURE(status = AcpiInitializeTables(NULL, 2, TRUE))) { 356 printf("ACPI: Table initialisation failed: %s\n", 357 AcpiFormatException(status)); 358 return_VALUE (status); 359 } 360 361 /* Set up any quirks we have for this system. */ 362 if (acpi_quirks == ACPI_Q_OK) 363 acpi_table_quirks(&acpi_quirks); 364 365 /* If the user manually set the disabled hint to 0, force-enable ACPI. */ 366 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0) 367 acpi_quirks &= ~ACPI_Q_BROKEN; 368 if (acpi_quirks & ACPI_Q_BROKEN) { 369 printf("ACPI disabled by blacklist. Contact your BIOS vendor.\n"); 370 status = AE_SUPPORT; 371 } 372 373 return_VALUE (status); 374} 375 376/* 377 * Detect ACPI and perform early initialisation. 378 */ 379int 380acpi_identify(void) 381{ 382 ACPI_TABLE_RSDP *rsdp; 383 ACPI_TABLE_HEADER *rsdt; 384 ACPI_PHYSICAL_ADDRESS paddr; 385 struct sbuf sb; 386 387 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 388 389 if (!cold) 390 return (ENXIO); 391 392 /* Check that we haven't been disabled with a hint. */ 393 if (resource_disabled("acpi", 0)) 394 return (ENXIO); 395 396 /* Check for other PM systems. */ 397 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 398 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 399 printf("ACPI identify failed, other PM system enabled.\n"); 400 return (ENXIO); 401 } 402 403 /* Initialize root tables. */ 404 if (ACPI_FAILURE(acpi_Startup())) { 405 printf("ACPI: Try disabling either ACPI or apic support.\n"); 406 return (ENXIO); 407 } 408 409 if ((paddr = AcpiOsGetRootPointer()) == 0 || 410 (rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP))) == NULL) 411 return (ENXIO); 412 if (rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress != 0) 413 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress; 414 else 415 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress; 416 AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP)); 417 418 if ((rsdt = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER))) == NULL) 419 return (ENXIO); 420 sbuf_new(&sb, acpi_desc, sizeof(acpi_desc), SBUF_FIXEDLEN); 421 sbuf_bcat(&sb, rsdt->OemId, ACPI_OEM_ID_SIZE); 422 sbuf_trim(&sb); 423 sbuf_putc(&sb, ' '); 424 sbuf_bcat(&sb, rsdt->OemTableId, ACPI_OEM_TABLE_ID_SIZE); 425 sbuf_trim(&sb); 426 sbuf_finish(&sb); 427 sbuf_delete(&sb); 428 AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER)); 429 430 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%x", ACPI_CA_VERSION); 431 432 return (0); 433} 434 435/* 436 * Fetch some descriptive data from ACPI to put in our attach message. 437 */ 438static int 439acpi_probe(device_t dev) 440{ 441 442 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 443 444 device_set_desc(dev, acpi_desc); 445 446 return_VALUE (BUS_PROBE_NOWILDCARD); 447} 448 449static int 450acpi_attach(device_t dev) 451{ 452 struct acpi_softc *sc; 453 ACPI_STATUS status; 454 int error, state; 455 UINT32 flags; 456 UINT8 TypeA, TypeB; 457 char *env; 458 459 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 460 461 sc = device_get_softc(dev); 462 sc->acpi_dev = dev; 463 callout_init(&sc->susp_force_to, 1); 464 465 error = ENXIO; 466 467 /* Initialize resource manager. */ 468 acpi_rman_io.rm_type = RMAN_ARRAY; 469 acpi_rman_io.rm_start = 0; 470 acpi_rman_io.rm_end = 0xffff; 471 acpi_rman_io.rm_descr = "ACPI I/O ports"; 472 if (rman_init(&acpi_rman_io) != 0) 473 panic("acpi rman_init IO ports failed"); 474 acpi_rman_mem.rm_type = RMAN_ARRAY; 475 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses"; 476 if (rman_init(&acpi_rman_mem) != 0) 477 panic("acpi rman_init memory failed"); 478 479 /* Initialise the ACPI mutex */ 480 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF); 481 482 /* 483 * Set the globals from our tunables. This is needed because ACPI-CA 484 * uses UINT8 for some values and we have no tunable_byte. 485 */ 486 AcpiGbl_EnableInterpreterSlack = acpi_interpreter_slack ? TRUE : FALSE; 487 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE; 488 AcpiGbl_UseDefaultRegisterWidths = acpi_ignore_reg_width ? TRUE : FALSE; 489 490#ifndef ACPI_DEBUG 491 /* 492 * Disable all debugging layers and levels. 493 */ 494 AcpiDbgLayer = 0; 495 AcpiDbgLevel = 0; 496#endif 497 498 /* Override OS interfaces if the user requested. */ 499 acpi_reset_interfaces(dev); 500 501 /* Load ACPI name space. */ 502 status = AcpiLoadTables(); 503 if (ACPI_FAILURE(status)) { 504 device_printf(dev, "Could not load Namespace: %s\n", 505 AcpiFormatException(status)); 506 goto out; 507 } 508 509#if defined(__i386__) || defined(__amd64__) 510 /* Handle MCFG table if present. */ 511 acpi_enable_pcie(); 512#endif 513 514 /* 515 * Note that some systems (specifically, those with namespace evaluation 516 * issues that require the avoidance of parts of the namespace) must 517 * avoid running _INI and _STA on everything, as well as dodging the final 518 * object init pass. 519 * 520 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 521 * 522 * XXX We should arrange for the object init pass after we have attached 523 * all our child devices, but on many systems it works here. 524 */ 525 flags = 0; 526 if (testenv("debug.acpi.avoid")) 527 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 528 529 /* Bring the hardware and basic handlers online. */ 530 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 531 device_printf(dev, "Could not enable ACPI: %s\n", 532 AcpiFormatException(status)); 533 goto out; 534 } 535 536 /* 537 * Call the ECDT probe function to provide EC functionality before 538 * the namespace has been evaluated. 539 * 540 * XXX This happens before the sysresource devices have been probed and 541 * attached so its resources come from nexus0. In practice, this isn't 542 * a problem but should be addressed eventually. 543 */ 544 acpi_ec_ecdt_probe(dev); 545 546 /* Bring device objects and regions online. */ 547 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 548 device_printf(dev, "Could not initialize ACPI objects: %s\n", 549 AcpiFormatException(status)); 550 goto out; 551 } 552 553 /* 554 * Setup our sysctl tree. 555 * 556 * XXX: This doesn't check to make sure that none of these fail. 557 */ 558 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 559 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 560 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 561 device_get_name(dev), CTLFLAG_RD, 0, ""); 562 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 563 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 564 0, 0, acpi_supported_sleep_state_sysctl, "A", 565 "List supported ACPI sleep states."); 566 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 567 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 568 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", 569 "Power button ACPI sleep state."); 570 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 571 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 572 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", 573 "Sleep button ACPI sleep state."); 574 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 575 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 576 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", 577 "Lid ACPI sleep state. Set to S3 if you want to suspend your laptop when close the Lid."); 578 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 579 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 580 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 581 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 582 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 583 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 584 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 585 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0, 586 "sleep delay in seconds"); 587 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 588 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode"); 589 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 590 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode"); 591 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 592 OID_AUTO, "disable_on_reboot", CTLFLAG_RW, 593 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system"); 594 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 595 OID_AUTO, "handle_reboot", CTLFLAG_RW, 596 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot"); 597 598 /* 599 * Default to 1 second before sleeping to give some machines time to 600 * stabilize. 601 */ 602 sc->acpi_sleep_delay = 1; 603 if (bootverbose) 604 sc->acpi_verbose = 1; 605 if ((env = kern_getenv("hw.acpi.verbose")) != NULL) { 606 if (strcmp(env, "0") != 0) 607 sc->acpi_verbose = 1; 608 freeenv(env); 609 } 610 611 /* Only enable reboot by default if the FADT says it is available. */ 612 if (AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) 613 sc->acpi_handle_reboot = 1; 614 615#if !ACPI_REDUCED_HARDWARE 616 /* Only enable S4BIOS by default if the FACS says it is available. */ 617 if (AcpiGbl_FACS != NULL && AcpiGbl_FACS->Flags & ACPI_FACS_S4_BIOS_PRESENT) 618 sc->acpi_s4bios = 1; 619#endif 620 621 /* Probe all supported sleep states. */ 622 acpi_sleep_states[ACPI_STATE_S0] = TRUE; 623 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++) 624 if (ACPI_SUCCESS(AcpiEvaluateObject(ACPI_ROOT_OBJECT, 625 __DECONST(char *, AcpiGbl_SleepStateNames[state]), NULL, NULL)) && 626 ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) 627 acpi_sleep_states[state] = TRUE; 628 629 /* 630 * Dispatch the default sleep state to devices. The lid switch is set 631 * to UNKNOWN by default to avoid surprising users. 632 */ 633 sc->acpi_power_button_sx = acpi_sleep_states[ACPI_STATE_S5] ? 634 ACPI_STATE_S5 : ACPI_STATE_UNKNOWN; 635 sc->acpi_lid_switch_sx = ACPI_STATE_UNKNOWN; 636 sc->acpi_standby_sx = acpi_sleep_states[ACPI_STATE_S1] ? 637 ACPI_STATE_S1 : ACPI_STATE_UNKNOWN; 638 sc->acpi_suspend_sx = acpi_sleep_states[ACPI_STATE_S3] ? 639 ACPI_STATE_S3 : ACPI_STATE_UNKNOWN; 640 641 /* Pick the first valid sleep state for the sleep button default. */ 642 sc->acpi_sleep_button_sx = ACPI_STATE_UNKNOWN; 643 for (state = ACPI_STATE_S1; state <= ACPI_STATE_S4; state++) 644 if (acpi_sleep_states[state]) { 645 sc->acpi_sleep_button_sx = state; 646 break; 647 } 648 649 acpi_enable_fixed_events(sc); 650 651 /* 652 * Scan the namespace and attach/initialise children. 653 */ 654 655 /* Register our shutdown handler. */ 656 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 657 SHUTDOWN_PRI_LAST); 658 659 /* 660 * Register our acpi event handlers. 661 * XXX should be configurable eg. via userland policy manager. 662 */ 663 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 664 sc, ACPI_EVENT_PRI_LAST); 665 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 666 sc, ACPI_EVENT_PRI_LAST); 667 668 /* Flag our initial states. */ 669 sc->acpi_enabled = TRUE; 670 sc->acpi_sstate = ACPI_STATE_S0; 671 sc->acpi_sleep_disabled = TRUE; 672 673 /* Create the control device */ 674 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644, 675 "acpi"); 676 sc->acpi_dev_t->si_drv1 = sc; 677 678 if ((error = acpi_machdep_init(dev))) 679 goto out; 680 681 /* Register ACPI again to pass the correct argument of pm_func. */ 682 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 683 684 if (!acpi_disabled("bus")) { 685 EVENTHANDLER_REGISTER(dev_lookup, acpi_lookup, NULL, 1000); 686 acpi_probe_children(dev); 687 } 688 689 /* Update all GPEs and enable runtime GPEs. */ 690 status = AcpiUpdateAllGpes(); 691 if (ACPI_FAILURE(status)) 692 device_printf(dev, "Could not update all GPEs: %s\n", 693 AcpiFormatException(status)); 694 695 /* Allow sleep request after a while. */ 696 callout_init_mtx(&acpi_sleep_timer, &acpi_mutex, 0); 697 callout_reset(&acpi_sleep_timer, hz * ACPI_MINIMUM_AWAKETIME, 698 acpi_sleep_enable, sc); 699 700 error = 0; 701 702 out: 703 return_VALUE (error); 704} 705 706static void 707acpi_set_power_children(device_t dev, int state) 708{ 709 device_t child; 710 device_t *devlist; 711 int dstate, i, numdevs; 712 713 if (device_get_children(dev, &devlist, &numdevs) != 0) 714 return; 715 716 /* 717 * Retrieve and set D-state for the sleep state if _SxD is present. 718 * Skip children who aren't attached since they are handled separately. 719 */ 720 for (i = 0; i < numdevs; i++) { 721 child = devlist[i]; 722 dstate = state; 723 if (device_is_attached(child) && 724 acpi_device_pwr_for_sleep(dev, child, &dstate) == 0) 725 acpi_set_powerstate(child, dstate); 726 } 727 free(devlist, M_TEMP); 728} 729 730static int 731acpi_suspend(device_t dev) 732{ 733 int error; 734 735 GIANT_REQUIRED; 736 737 error = bus_generic_suspend(dev); 738 if (error == 0) 739 acpi_set_power_children(dev, ACPI_STATE_D3); 740 741 return (error); 742} 743 744static int 745acpi_resume(device_t dev) 746{ 747 748 GIANT_REQUIRED; 749 750 acpi_set_power_children(dev, ACPI_STATE_D0); 751 752 return (bus_generic_resume(dev)); 753} 754 755static int 756acpi_shutdown(device_t dev) 757{ 758 759 GIANT_REQUIRED; 760 761 /* Allow children to shutdown first. */ 762 bus_generic_shutdown(dev); 763 764 /* 765 * Enable any GPEs that are able to power-on the system (i.e., RTC). 766 * Also, disable any that are not valid for this state (most). 767 */ 768 acpi_wake_prep_walk(ACPI_STATE_S5); 769 770 return (0); 771} 772 773/* 774 * Handle a new device being added 775 */ 776static device_t 777acpi_add_child(device_t bus, u_int order, const char *name, int unit) 778{ 779 struct acpi_device *ad; 780 device_t child; 781 782 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 783 return (NULL); 784 785 resource_list_init(&ad->ad_rl); 786 787 child = device_add_child_ordered(bus, order, name, unit); 788 if (child != NULL) 789 device_set_ivars(child, ad); 790 else 791 free(ad, M_ACPIDEV); 792 return (child); 793} 794 795static int 796acpi_print_child(device_t bus, device_t child) 797{ 798 struct acpi_device *adev = device_get_ivars(child); 799 struct resource_list *rl = &adev->ad_rl; 800 int retval = 0; 801 802 retval += bus_print_child_header(bus, child); 803 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#jx"); 804 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#jx"); 805 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%jd"); 806 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%jd"); 807 if (device_get_flags(child)) 808 retval += printf(" flags %#x", device_get_flags(child)); 809 retval += bus_print_child_domain(bus, child); 810 retval += bus_print_child_footer(bus, child); 811 812 return (retval); 813} 814 815/* 816 * If this device is an ACPI child but no one claimed it, attempt 817 * to power it off. We'll power it back up when a driver is added. 818 * 819 * XXX Disabled for now since many necessary devices (like fdc and 820 * ATA) don't claim the devices we created for them but still expect 821 * them to be powered up. 822 */ 823static void 824acpi_probe_nomatch(device_t bus, device_t child) 825{ 826#ifdef ACPI_ENABLE_POWERDOWN_NODRIVER 827 acpi_set_powerstate(child, ACPI_STATE_D3); 828#endif 829} 830 831/* 832 * If a new driver has a chance to probe a child, first power it up. 833 * 834 * XXX Disabled for now (see acpi_probe_nomatch for details). 835 */ 836static void 837acpi_driver_added(device_t dev, driver_t *driver) 838{ 839 device_t child, *devlist; 840 int i, numdevs; 841 842 DEVICE_IDENTIFY(driver, dev); 843 if (device_get_children(dev, &devlist, &numdevs)) 844 return; 845 for (i = 0; i < numdevs; i++) { 846 child = devlist[i]; 847 if (device_get_state(child) == DS_NOTPRESENT) { 848#ifdef ACPI_ENABLE_POWERDOWN_NODRIVER 849 acpi_set_powerstate(child, ACPI_STATE_D0); 850 if (device_probe_and_attach(child) != 0) 851 acpi_set_powerstate(child, ACPI_STATE_D3); 852#else 853 device_probe_and_attach(child); 854#endif 855 } 856 } 857 free(devlist, M_TEMP); 858} 859 860/* Location hint for devctl(8) */ 861static int 862acpi_child_location_str_method(device_t cbdev, device_t child, char *buf, 863 size_t buflen) 864{ 865 struct acpi_device *dinfo = device_get_ivars(child); 866 char buf2[32]; 867 int pxm; 868 869 if (dinfo->ad_handle) { 870 snprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle)); 871 if (ACPI_SUCCESS(acpi_GetInteger(dinfo->ad_handle, "_PXM", &pxm))) { 872 snprintf(buf2, 32, " _PXM=%d", pxm); 873 strlcat(buf, buf2, buflen); 874 } 875 } else { 876 snprintf(buf, buflen, "unknown"); 877 } 878 return (0); 879} 880 881/* PnP information for devctl(8) */ 882static int 883acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 884 size_t buflen) 885{ 886 struct acpi_device *dinfo = device_get_ivars(child); 887 ACPI_DEVICE_INFO *adinfo; 888 889 if (ACPI_FAILURE(AcpiGetObjectInfo(dinfo->ad_handle, &adinfo))) { 890 snprintf(buf, buflen, "unknown"); 891 return (0); 892 } 893 894 snprintf(buf, buflen, "_HID=%s _UID=%lu", 895 (adinfo->Valid & ACPI_VALID_HID) ? 896 adinfo->HardwareId.String : "none", 897 (adinfo->Valid & ACPI_VALID_UID) ? 898 strtoul(adinfo->UniqueId.String, NULL, 10) : 0UL); 899 AcpiOsFree(adinfo); 900 901 return (0); 902} 903 904/* 905 * Handle per-device ivars 906 */ 907static int 908acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 909{ 910 struct acpi_device *ad; 911 912 if ((ad = device_get_ivars(child)) == NULL) { 913 device_printf(child, "device has no ivars\n"); 914 return (ENOENT); 915 } 916 917 /* ACPI and ISA compatibility ivars */ 918 switch(index) { 919 case ACPI_IVAR_HANDLE: 920 *(ACPI_HANDLE *)result = ad->ad_handle; 921 break; 922 case ACPI_IVAR_PRIVATE: 923 *(void **)result = ad->ad_private; 924 break; 925 case ACPI_IVAR_FLAGS: 926 *(int *)result = ad->ad_flags; 927 break; 928 case ISA_IVAR_VENDORID: 929 case ISA_IVAR_SERIAL: 930 case ISA_IVAR_COMPATID: 931 *(int *)result = -1; 932 break; 933 case ISA_IVAR_LOGICALID: 934 *(int *)result = acpi_isa_get_logicalid(child); 935 break; 936 default: 937 return (ENOENT); 938 } 939 940 return (0); 941} 942 943static int 944acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 945{ 946 struct acpi_device *ad; 947 948 if ((ad = device_get_ivars(child)) == NULL) { 949 device_printf(child, "device has no ivars\n"); 950 return (ENOENT); 951 } 952 953 switch(index) { 954 case ACPI_IVAR_HANDLE: 955 ad->ad_handle = (ACPI_HANDLE)value; 956 break; 957 case ACPI_IVAR_PRIVATE: 958 ad->ad_private = (void *)value; 959 break; 960 case ACPI_IVAR_FLAGS: 961 ad->ad_flags = (int)value; 962 break; 963 default: 964 panic("bad ivar write request (%d)", index); 965 return (ENOENT); 966 } 967 968 return (0); 969} 970 971/* 972 * Handle child resource allocation/removal 973 */ 974static struct resource_list * 975acpi_get_rlist(device_t dev, device_t child) 976{ 977 struct acpi_device *ad; 978 979 ad = device_get_ivars(child); 980 return (&ad->ad_rl); 981} 982 983static int 984acpi_match_resource_hint(device_t dev, int type, long value) 985{ 986 struct acpi_device *ad = device_get_ivars(dev); 987 struct resource_list *rl = &ad->ad_rl; 988 struct resource_list_entry *rle; 989 990 STAILQ_FOREACH(rle, rl, link) { 991 if (rle->type != type) 992 continue; 993 if (rle->start <= value && rle->end >= value) 994 return (1); 995 } 996 return (0); 997} 998 999/* 1000 * Wire device unit numbers based on resource matches in hints. 1001 */ 1002static void 1003acpi_hint_device_unit(device_t acdev, device_t child, const char *name, 1004 int *unitp) 1005{ 1006 const char *s; 1007 long value; 1008 int line, matches, unit; 1009 1010 /* 1011 * Iterate over all the hints for the devices with the specified 1012 * name to see if one's resources are a subset of this device. 1013 */ 1014 line = 0; 1015 for (;;) { 1016 if (resource_find_dev(&line, name, &unit, "at", NULL) != 0) 1017 break; 1018 1019 /* Must have an "at" for acpi or isa. */ 1020 resource_string_value(name, unit, "at", &s); 1021 if (!(strcmp(s, "acpi0") == 0 || strcmp(s, "acpi") == 0 || 1022 strcmp(s, "isa0") == 0 || strcmp(s, "isa") == 0)) 1023 continue; 1024 1025 /* 1026 * Check for matching resources. We must have at least one match. 1027 * Since I/O and memory resources cannot be shared, if we get a 1028 * match on either of those, ignore any mismatches in IRQs or DRQs. 1029 * 1030 * XXX: We may want to revisit this to be more lenient and wire 1031 * as long as it gets one match. 1032 */ 1033 matches = 0; 1034 if (resource_long_value(name, unit, "port", &value) == 0) { 1035 /* 1036 * Floppy drive controllers are notorious for having a 1037 * wide variety of resources not all of which include the 1038 * first port that is specified by the hint (typically 1039 * 0x3f0) (see the comment above fdc_isa_alloc_resources() 1040 * in fdc_isa.c). However, they do all seem to include 1041 * port + 2 (e.g. 0x3f2) so for a floppy device, look for 1042 * 'value + 2' in the port resources instead of the hint 1043 * value. 1044 */ 1045 if (strcmp(name, "fdc") == 0) 1046 value += 2; 1047 if (acpi_match_resource_hint(child, SYS_RES_IOPORT, value)) 1048 matches++; 1049 else 1050 continue; 1051 } 1052 if (resource_long_value(name, unit, "maddr", &value) == 0) { 1053 if (acpi_match_resource_hint(child, SYS_RES_MEMORY, value)) 1054 matches++; 1055 else 1056 continue; 1057 } 1058 if (matches > 0) 1059 goto matched; 1060 if (resource_long_value(name, unit, "irq", &value) == 0) { 1061 if (acpi_match_resource_hint(child, SYS_RES_IRQ, value)) 1062 matches++; 1063 else 1064 continue; 1065 } 1066 if (resource_long_value(name, unit, "drq", &value) == 0) { 1067 if (acpi_match_resource_hint(child, SYS_RES_DRQ, value)) 1068 matches++; 1069 else 1070 continue; 1071 } 1072 1073 matched: 1074 if (matches > 0) { 1075 /* We have a winner! */ 1076 *unitp = unit; 1077 break; 1078 } 1079 } 1080} 1081 1082/* 1083 * Fetch the NUMA domain for a device by mapping the value returned by 1084 * _PXM to a NUMA domain. If the device does not have a _PXM method, 1085 * -2 is returned. If any other error occurs, -1 is returned. 1086 */ 1087static int 1088acpi_parse_pxm(device_t dev) 1089{ 1090#ifdef DEVICE_NUMA 1091 ACPI_HANDLE handle; 1092 ACPI_STATUS status; 1093 int pxm; 1094 1095 handle = acpi_get_handle(dev); 1096 if (handle == NULL) 1097 return (-2); 1098 status = acpi_GetInteger(handle, "_PXM", &pxm); 1099 if (ACPI_SUCCESS(status)) 1100 return (acpi_map_pxm_to_vm_domainid(pxm)); 1101 if (status == AE_NOT_FOUND) 1102 return (-2); 1103#endif 1104 return (-1); 1105} 1106 1107int 1108acpi_get_cpus(device_t dev, device_t child, enum cpu_sets op, size_t setsize, 1109 cpuset_t *cpuset) 1110{ 1111 int d, error; 1112 1113 d = acpi_parse_pxm(child); 1114 if (d < 0) 1115 return (bus_generic_get_cpus(dev, child, op, setsize, cpuset)); 1116 1117 switch (op) { 1118 case LOCAL_CPUS: 1119 if (setsize != sizeof(cpuset_t)) 1120 return (EINVAL); 1121 *cpuset = cpuset_domain[d]; 1122 return (0); 1123 case INTR_CPUS: 1124 error = bus_generic_get_cpus(dev, child, op, setsize, cpuset); 1125 if (error != 0) 1126 return (error); 1127 if (setsize != sizeof(cpuset_t)) 1128 return (EINVAL); 1129 CPU_AND(cpuset, &cpuset_domain[d]); 1130 return (0); 1131 default: 1132 return (bus_generic_get_cpus(dev, child, op, setsize, cpuset)); 1133 } 1134} 1135 1136/* 1137 * Fetch the NUMA domain for the given device 'dev'. 1138 * 1139 * If a device has a _PXM method, map that to a NUMA domain. 1140 * Otherwise, pass the request up to the parent. 1141 * If there's no matching domain or the domain cannot be 1142 * determined, return ENOENT. 1143 */ 1144int 1145acpi_get_domain(device_t dev, device_t child, int *domain) 1146{ 1147 int d; 1148 1149 d = acpi_parse_pxm(child); 1150 if (d >= 0) { 1151 *domain = d; 1152 return (0); 1153 } 1154 if (d == -1) 1155 return (ENOENT); 1156 1157 /* No _PXM node; go up a level */ 1158 return (bus_generic_get_domain(dev, child, domain)); 1159} 1160 1161/* 1162 * Pre-allocate/manage all memory and IO resources. Since rman can't handle 1163 * duplicates, we merge any in the sysresource attach routine. 1164 */ 1165static int 1166acpi_sysres_alloc(device_t dev) 1167{ 1168 struct resource *res; 1169 struct resource_list *rl; 1170 struct resource_list_entry *rle; 1171 struct rman *rm; 1172 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 1173 device_t *children; 1174 int child_count, i; 1175 1176 /* 1177 * Probe/attach any sysresource devices. This would be unnecessary if we 1178 * had multi-pass probe/attach. 1179 */ 1180 if (device_get_children(dev, &children, &child_count) != 0) 1181 return (ENXIO); 1182 for (i = 0; i < child_count; i++) { 1183 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 1184 device_probe_and_attach(children[i]); 1185 } 1186 free(children, M_TEMP); 1187 1188 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev); 1189 STAILQ_FOREACH(rle, rl, link) { 1190 if (rle->res != NULL) { 1191 device_printf(dev, "duplicate resource for %jx\n", rle->start); 1192 continue; 1193 } 1194 1195 /* Only memory and IO resources are valid here. */ 1196 switch (rle->type) { 1197 case SYS_RES_IOPORT: 1198 rm = &acpi_rman_io; 1199 break; 1200 case SYS_RES_MEMORY: 1201 rm = &acpi_rman_mem; 1202 break; 1203 default: 1204 continue; 1205 } 1206 1207 /* Pre-allocate resource and add to our rman pool. */ 1208 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type, 1209 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 0); 1210 if (res != NULL) { 1211 rman_manage_region(rm, rman_get_start(res), rman_get_end(res)); 1212 rle->res = res; 1213 } else if (bootverbose) 1214 device_printf(dev, "reservation of %jx, %jx (%d) failed\n", 1215 rle->start, rle->count, rle->type); 1216 } 1217 return (0); 1218} 1219 1220static char *pcilink_ids[] = { "PNP0C0F", NULL }; 1221static char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 1222 1223/* 1224 * Reserve declared resources for devices found during attach once system 1225 * resources have been allocated. 1226 */ 1227static void 1228acpi_reserve_resources(device_t dev) 1229{ 1230 struct resource_list_entry *rle; 1231 struct resource_list *rl; 1232 struct acpi_device *ad; 1233 struct acpi_softc *sc; 1234 device_t *children; 1235 int child_count, i; 1236 1237 sc = device_get_softc(dev); 1238 if (device_get_children(dev, &children, &child_count) != 0) 1239 return; 1240 for (i = 0; i < child_count; i++) { 1241 ad = device_get_ivars(children[i]); 1242 rl = &ad->ad_rl; 1243 1244 /* Don't reserve system resources. */ 1245 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 1246 continue; 1247 1248 STAILQ_FOREACH(rle, rl, link) { 1249 /* 1250 * Don't reserve IRQ resources. There are many sticky things 1251 * to get right otherwise (e.g. IRQs for psm, atkbd, and HPET 1252 * when using legacy routing). 1253 */ 1254 if (rle->type == SYS_RES_IRQ) 1255 continue; 1256 1257 /* 1258 * Don't reserve the resource if it is already allocated. 1259 * The acpi_ec(4) driver can allocate its resources early 1260 * if ECDT is present. 1261 */ 1262 if (rle->res != NULL) 1263 continue; 1264 1265 /* 1266 * Try to reserve the resource from our parent. If this 1267 * fails because the resource is a system resource, just 1268 * let it be. The resource range is already reserved so 1269 * that other devices will not use it. If the driver 1270 * needs to allocate the resource, then 1271 * acpi_alloc_resource() will sub-alloc from the system 1272 * resource. 1273 */ 1274 resource_list_reserve(rl, dev, children[i], rle->type, &rle->rid, 1275 rle->start, rle->end, rle->count, 0); 1276 } 1277 } 1278 free(children, M_TEMP); 1279 sc->acpi_resources_reserved = 1; 1280} 1281 1282static int 1283acpi_set_resource(device_t dev, device_t child, int type, int rid, 1284 rman_res_t start, rman_res_t count) 1285{ 1286 struct acpi_softc *sc = device_get_softc(dev); 1287 struct acpi_device *ad = device_get_ivars(child); 1288 struct resource_list *rl = &ad->ad_rl; 1289 ACPI_DEVICE_INFO *devinfo; 1290 rman_res_t end; 1291 1292 /* Ignore IRQ resources for PCI link devices. */ 1293 if (type == SYS_RES_IRQ && ACPI_ID_PROBE(dev, child, pcilink_ids) != NULL) 1294 return (0); 1295 1296 /* 1297 * Ignore most resources for PCI root bridges. Some BIOSes 1298 * incorrectly enumerate the memory ranges they decode as plain 1299 * memory resources instead of as ResourceProducer ranges. Other 1300 * BIOSes incorrectly list system resource entries for I/O ranges 1301 * under the PCI bridge. Do allow the one known-correct case on 1302 * x86 of a PCI bridge claiming the I/O ports used for PCI config 1303 * access. 1304 */ 1305 if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) { 1306 if (ACPI_SUCCESS(AcpiGetObjectInfo(ad->ad_handle, &devinfo))) { 1307 if ((devinfo->Flags & ACPI_PCI_ROOT_BRIDGE) != 0) { 1308#if defined(__i386__) || defined(__amd64__) 1309 if (!(type == SYS_RES_IOPORT && start == CONF1_ADDR_PORT)) 1310#endif 1311 { 1312 AcpiOsFree(devinfo); 1313 return (0); 1314 } 1315 } 1316 AcpiOsFree(devinfo); 1317 } 1318 } 1319 1320 /* If the resource is already allocated, fail. */ 1321 if (resource_list_busy(rl, type, rid)) 1322 return (EBUSY); 1323 1324 /* If the resource is already reserved, release it. */ 1325 if (resource_list_reserved(rl, type, rid)) 1326 resource_list_unreserve(rl, dev, child, type, rid); 1327 1328 /* Add the resource. */ 1329 end = (start + count - 1); 1330 resource_list_add(rl, type, rid, start, end, count); 1331 1332 /* Don't reserve resources until the system resources are allocated. */ 1333 if (!sc->acpi_resources_reserved) 1334 return (0); 1335 1336 /* Don't reserve system resources. */ 1337 if (ACPI_ID_PROBE(dev, child, sysres_ids) != NULL) 1338 return (0); 1339 1340 /* 1341 * Don't reserve IRQ resources. There are many sticky things to 1342 * get right otherwise (e.g. IRQs for psm, atkbd, and HPET when 1343 * using legacy routing). 1344 */ 1345 if (type == SYS_RES_IRQ) 1346 return (0); 1347 1348 /* 1349 * Reserve the resource. 1350 * 1351 * XXX: Ignores failure for now. Failure here is probably a 1352 * BIOS/firmware bug? 1353 */ 1354 resource_list_reserve(rl, dev, child, type, &rid, start, end, count, 0); 1355 return (0); 1356} 1357 1358static struct resource * 1359acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 1360 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags) 1361{ 1362 ACPI_RESOURCE ares; 1363 struct acpi_device *ad; 1364 struct resource_list_entry *rle; 1365 struct resource_list *rl; 1366 struct resource *res; 1367 int isdefault = RMAN_IS_DEFAULT_RANGE(start, end); 1368 1369 /* 1370 * First attempt at allocating the resource. For direct children, 1371 * use resource_list_alloc() to handle reserved resources. For 1372 * other devices, pass the request up to our parent. 1373 */ 1374 if (bus == device_get_parent(child)) { 1375 ad = device_get_ivars(child); 1376 rl = &ad->ad_rl; 1377 1378 /* 1379 * Simulate the behavior of the ISA bus for direct children 1380 * devices. That is, if a non-default range is specified for 1381 * a resource that doesn't exist, use bus_set_resource() to 1382 * add the resource before allocating it. Note that these 1383 * resources will not be reserved. 1384 */ 1385 if (!isdefault && resource_list_find(rl, type, *rid) == NULL) 1386 resource_list_add(rl, type, *rid, start, end, count); 1387 res = resource_list_alloc(rl, bus, child, type, rid, start, end, count, 1388 flags); 1389 if (res != NULL && type == SYS_RES_IRQ) { 1390 /* 1391 * Since bus_config_intr() takes immediate effect, we cannot 1392 * configure the interrupt associated with a device when we 1393 * parse the resources but have to defer it until a driver 1394 * actually allocates the interrupt via bus_alloc_resource(). 1395 * 1396 * XXX: Should we handle the lookup failing? 1397 */ 1398 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares))) 1399 acpi_config_intr(child, &ares); 1400 } 1401 1402 /* 1403 * If this is an allocation of the "default" range for a given 1404 * RID, fetch the exact bounds for this resource from the 1405 * resource list entry to try to allocate the range from the 1406 * system resource regions. 1407 */ 1408 if (res == NULL && isdefault) { 1409 rle = resource_list_find(rl, type, *rid); 1410 if (rle != NULL) { 1411 start = rle->start; 1412 end = rle->end; 1413 count = rle->count; 1414 } 1415 } 1416 } else 1417 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid, 1418 start, end, count, flags); 1419 1420 /* 1421 * If the first attempt failed and this is an allocation of a 1422 * specific range, try to satisfy the request via a suballocation 1423 * from our system resource regions. 1424 */ 1425 if (res == NULL && start + count - 1 == end) 1426 res = acpi_alloc_sysres(child, type, rid, start, end, count, flags); 1427 return (res); 1428} 1429 1430/* 1431 * Attempt to allocate a specific resource range from the system 1432 * resource ranges. Note that we only handle memory and I/O port 1433 * system resources. 1434 */ 1435struct resource * 1436acpi_alloc_sysres(device_t child, int type, int *rid, rman_res_t start, 1437 rman_res_t end, rman_res_t count, u_int flags) 1438{ 1439 struct rman *rm; 1440 struct resource *res; 1441 1442 switch (type) { 1443 case SYS_RES_IOPORT: 1444 rm = &acpi_rman_io; 1445 break; 1446 case SYS_RES_MEMORY: 1447 rm = &acpi_rman_mem; 1448 break; 1449 default: 1450 return (NULL); 1451 } 1452 1453 KASSERT(start + count - 1 == end, ("wildcard resource range")); 1454 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE, 1455 child); 1456 if (res == NULL) 1457 return (NULL); 1458 1459 rman_set_rid(res, *rid); 1460 1461 /* If requested, activate the resource using the parent's method. */ 1462 if (flags & RF_ACTIVE) 1463 if (bus_activate_resource(child, type, *rid, res) != 0) { 1464 rman_release_resource(res); 1465 return (NULL); 1466 } 1467 1468 return (res); 1469} 1470 1471static int 1472acpi_is_resource_managed(int type, struct resource *r) 1473{ 1474 1475 /* We only handle memory and IO resources through rman. */ 1476 switch (type) { 1477 case SYS_RES_IOPORT: 1478 return (rman_is_region_manager(r, &acpi_rman_io)); 1479 case SYS_RES_MEMORY: 1480 return (rman_is_region_manager(r, &acpi_rman_mem)); 1481 } 1482 return (0); 1483} 1484 1485static int 1486acpi_adjust_resource(device_t bus, device_t child, int type, struct resource *r, 1487 rman_res_t start, rman_res_t end) 1488{ 1489 1490 if (acpi_is_resource_managed(type, r)) 1491 return (rman_adjust_resource(r, start, end)); 1492 return (bus_generic_adjust_resource(bus, child, type, r, start, end)); 1493} 1494 1495static int 1496acpi_release_resource(device_t bus, device_t child, int type, int rid, 1497 struct resource *r) 1498{ 1499 int ret; 1500 1501 /* 1502 * If this resource belongs to one of our internal managers, 1503 * deactivate it and release it to the local pool. 1504 */ 1505 if (acpi_is_resource_managed(type, r)) { 1506 if (rman_get_flags(r) & RF_ACTIVE) { 1507 ret = bus_deactivate_resource(child, type, rid, r); 1508 if (ret != 0) 1509 return (ret); 1510 } 1511 return (rman_release_resource(r)); 1512 } 1513 1514 return (bus_generic_rl_release_resource(bus, child, type, rid, r)); 1515} 1516 1517static void 1518acpi_delete_resource(device_t bus, device_t child, int type, int rid) 1519{ 1520 struct resource_list *rl; 1521 1522 rl = acpi_get_rlist(bus, child); 1523 if (resource_list_busy(rl, type, rid)) { 1524 device_printf(bus, "delete_resource: Resource still owned by child" 1525 " (type=%d, rid=%d)\n", type, rid); 1526 return; 1527 } 1528 resource_list_unreserve(rl, bus, child, type, rid); 1529 resource_list_delete(rl, type, rid); 1530} 1531 1532/* Allocate an IO port or memory resource, given its GAS. */ 1533int 1534acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas, 1535 struct resource **res, u_int flags) 1536{ 1537 int error, res_type; 1538 1539 error = ENOMEM; 1540 if (type == NULL || rid == NULL || gas == NULL || res == NULL) 1541 return (EINVAL); 1542 1543 /* We only support memory and IO spaces. */ 1544 switch (gas->SpaceId) { 1545 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1546 res_type = SYS_RES_MEMORY; 1547 break; 1548 case ACPI_ADR_SPACE_SYSTEM_IO: 1549 res_type = SYS_RES_IOPORT; 1550 break; 1551 default: 1552 return (EOPNOTSUPP); 1553 } 1554 1555 /* 1556 * If the register width is less than 8, assume the BIOS author means 1557 * it is a bit field and just allocate a byte. 1558 */ 1559 if (gas->BitWidth && gas->BitWidth < 8) 1560 gas->BitWidth = 8; 1561 1562 /* Validate the address after we're sure we support the space. */ 1563 if (gas->Address == 0 || gas->BitWidth == 0) 1564 return (EINVAL); 1565 1566 bus_set_resource(dev, res_type, *rid, gas->Address, 1567 gas->BitWidth / 8); 1568 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags); 1569 if (*res != NULL) { 1570 *type = res_type; 1571 error = 0; 1572 } else 1573 bus_delete_resource(dev, res_type, *rid); 1574 1575 return (error); 1576} 1577 1578/* Probe _HID and _CID for compatible ISA PNP ids. */ 1579static uint32_t 1580acpi_isa_get_logicalid(device_t dev) 1581{ 1582 ACPI_DEVICE_INFO *devinfo; 1583 ACPI_HANDLE h; 1584 uint32_t pnpid; 1585 1586 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1587 1588 /* Fetch and validate the HID. */ 1589 if ((h = acpi_get_handle(dev)) == NULL || 1590 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1591 return_VALUE (0); 1592 1593 pnpid = (devinfo->Valid & ACPI_VALID_HID) != 0 && 1594 devinfo->HardwareId.Length >= ACPI_EISAID_STRING_SIZE ? 1595 PNP_EISAID(devinfo->HardwareId.String) : 0; 1596 AcpiOsFree(devinfo); 1597 1598 return_VALUE (pnpid); 1599} 1600 1601static int 1602acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 1603{ 1604 ACPI_DEVICE_INFO *devinfo; 1605 ACPI_PNP_DEVICE_ID *ids; 1606 ACPI_HANDLE h; 1607 uint32_t *pnpid; 1608 int i, valid; 1609 1610 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1611 1612 pnpid = cids; 1613 1614 /* Fetch and validate the CID */ 1615 if ((h = acpi_get_handle(dev)) == NULL || 1616 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1617 return_VALUE (0); 1618 1619 if ((devinfo->Valid & ACPI_VALID_CID) == 0) { 1620 AcpiOsFree(devinfo); 1621 return_VALUE (0); 1622 } 1623 1624 if (devinfo->CompatibleIdList.Count < count) 1625 count = devinfo->CompatibleIdList.Count; 1626 ids = devinfo->CompatibleIdList.Ids; 1627 for (i = 0, valid = 0; i < count; i++) 1628 if (ids[i].Length >= ACPI_EISAID_STRING_SIZE && 1629 strncmp(ids[i].String, "PNP", 3) == 0) { 1630 *pnpid++ = PNP_EISAID(ids[i].String); 1631 valid++; 1632 } 1633 AcpiOsFree(devinfo); 1634 1635 return_VALUE (valid); 1636} 1637 1638static char * 1639acpi_device_id_probe(device_t bus, device_t dev, char **ids) 1640{ 1641 ACPI_HANDLE h; 1642 ACPI_OBJECT_TYPE t; 1643 int i; 1644 1645 h = acpi_get_handle(dev); 1646 if (ids == NULL || h == NULL) 1647 return (NULL); 1648 t = acpi_get_type(dev); 1649 if (t != ACPI_TYPE_DEVICE && t != ACPI_TYPE_PROCESSOR) 1650 return (NULL); 1651 1652 /* Try to match one of the array of IDs with a HID or CID. */ 1653 for (i = 0; ids[i] != NULL; i++) { 1654 if (acpi_MatchHid(h, ids[i])) 1655 return (ids[i]); 1656 } 1657 return (NULL); 1658} 1659 1660static ACPI_STATUS 1661acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname, 1662 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret) 1663{ 1664 ACPI_HANDLE h; 1665 1666 if (dev == NULL) 1667 h = ACPI_ROOT_OBJECT; 1668 else if ((h = acpi_get_handle(dev)) == NULL) 1669 return (AE_BAD_PARAMETER); 1670 return (AcpiEvaluateObject(h, pathname, parameters, ret)); 1671} 1672 1673int 1674acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate) 1675{ 1676 struct acpi_softc *sc; 1677 ACPI_HANDLE handle; 1678 ACPI_STATUS status; 1679 char sxd[8]; 1680 1681 handle = acpi_get_handle(dev); 1682 1683 /* 1684 * XXX If we find these devices, don't try to power them down. 1685 * The serial and IRDA ports on my T23 hang the system when 1686 * set to D3 and it appears that such legacy devices may 1687 * need special handling in their drivers. 1688 */ 1689 if (dstate == NULL || handle == NULL || 1690 acpi_MatchHid(handle, "PNP0500") || 1691 acpi_MatchHid(handle, "PNP0501") || 1692 acpi_MatchHid(handle, "PNP0502") || 1693 acpi_MatchHid(handle, "PNP0510") || 1694 acpi_MatchHid(handle, "PNP0511")) 1695 return (ENXIO); 1696 1697 /* 1698 * Override next state with the value from _SxD, if present. 1699 * Note illegal _S0D is evaluated because some systems expect this. 1700 */ 1701 sc = device_get_softc(bus); 1702 snprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate); 1703 status = acpi_GetInteger(handle, sxd, dstate); 1704 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { 1705 device_printf(dev, "failed to get %s on %s: %s\n", sxd, 1706 acpi_name(handle), AcpiFormatException(status)); 1707 return (ENXIO); 1708 } 1709 1710 return (0); 1711} 1712 1713/* Callback arg for our implementation of walking the namespace. */ 1714struct acpi_device_scan_ctx { 1715 acpi_scan_cb_t user_fn; 1716 void *arg; 1717 ACPI_HANDLE parent; 1718}; 1719 1720static ACPI_STATUS 1721acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval) 1722{ 1723 struct acpi_device_scan_ctx *ctx; 1724 device_t dev, old_dev; 1725 ACPI_STATUS status; 1726 ACPI_OBJECT_TYPE type; 1727 1728 /* 1729 * Skip this device if we think we'll have trouble with it or it is 1730 * the parent where the scan began. 1731 */ 1732 ctx = (struct acpi_device_scan_ctx *)arg; 1733 if (acpi_avoid(h) || h == ctx->parent) 1734 return (AE_OK); 1735 1736 /* If this is not a valid device type (e.g., a method), skip it. */ 1737 if (ACPI_FAILURE(AcpiGetType(h, &type))) 1738 return (AE_OK); 1739 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR && 1740 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER) 1741 return (AE_OK); 1742 1743 /* 1744 * Call the user function with the current device. If it is unchanged 1745 * afterwards, return. Otherwise, we update the handle to the new dev. 1746 */ 1747 old_dev = acpi_get_device(h); 1748 dev = old_dev; 1749 status = ctx->user_fn(h, &dev, level, ctx->arg); 1750 if (ACPI_FAILURE(status) || old_dev == dev) 1751 return (status); 1752 1753 /* Remove the old child and its connection to the handle. */ 1754 if (old_dev != NULL) { 1755 device_delete_child(device_get_parent(old_dev), old_dev); 1756 AcpiDetachData(h, acpi_fake_objhandler); 1757 } 1758 1759 /* Recreate the handle association if the user created a device. */ 1760 if (dev != NULL) 1761 AcpiAttachData(h, acpi_fake_objhandler, dev); 1762 1763 return (AE_OK); 1764} 1765 1766static ACPI_STATUS 1767acpi_device_scan_children(device_t bus, device_t dev, int max_depth, 1768 acpi_scan_cb_t user_fn, void *arg) 1769{ 1770 ACPI_HANDLE h; 1771 struct acpi_device_scan_ctx ctx; 1772 1773 if (acpi_disabled("children")) 1774 return (AE_OK); 1775 1776 if (dev == NULL) 1777 h = ACPI_ROOT_OBJECT; 1778 else if ((h = acpi_get_handle(dev)) == NULL) 1779 return (AE_BAD_PARAMETER); 1780 ctx.user_fn = user_fn; 1781 ctx.arg = arg; 1782 ctx.parent = h; 1783 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth, 1784 acpi_device_scan_cb, NULL, &ctx, NULL)); 1785} 1786 1787/* 1788 * Even though ACPI devices are not PCI, we use the PCI approach for setting 1789 * device power states since it's close enough to ACPI. 1790 */ 1791static int 1792acpi_set_powerstate(device_t child, int state) 1793{ 1794 ACPI_HANDLE h; 1795 ACPI_STATUS status; 1796 1797 h = acpi_get_handle(child); 1798 if (state < ACPI_STATE_D0 || state > ACPI_D_STATES_MAX) 1799 return (EINVAL); 1800 if (h == NULL) 1801 return (0); 1802 1803 /* Ignore errors if the power methods aren't present. */ 1804 status = acpi_pwr_switch_consumer(h, state); 1805 if (ACPI_SUCCESS(status)) { 1806 if (bootverbose) 1807 device_printf(child, "set ACPI power state D%d on %s\n", 1808 state, acpi_name(h)); 1809 } else if (status != AE_NOT_FOUND) 1810 device_printf(child, 1811 "failed to set ACPI power state D%d on %s: %s\n", state, 1812 acpi_name(h), AcpiFormatException(status)); 1813 1814 return (0); 1815} 1816 1817static int 1818acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 1819{ 1820 int result, cid_count, i; 1821 uint32_t lid, cids[8]; 1822 1823 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1824 1825 /* 1826 * ISA-style drivers attached to ACPI may persist and 1827 * probe manually if we return ENOENT. We never want 1828 * that to happen, so don't ever return it. 1829 */ 1830 result = ENXIO; 1831 1832 /* Scan the supplied IDs for a match */ 1833 lid = acpi_isa_get_logicalid(child); 1834 cid_count = acpi_isa_get_compatid(child, cids, 8); 1835 while (ids && ids->ip_id) { 1836 if (lid == ids->ip_id) { 1837 result = 0; 1838 goto out; 1839 } 1840 for (i = 0; i < cid_count; i++) { 1841 if (cids[i] == ids->ip_id) { 1842 result = 0; 1843 goto out; 1844 } 1845 } 1846 ids++; 1847 } 1848 1849 out: 1850 if (result == 0 && ids->ip_desc) 1851 device_set_desc(child, ids->ip_desc); 1852 1853 return_VALUE (result); 1854} 1855 1856#if defined(__i386__) || defined(__amd64__) 1857/* 1858 * Look for a MCFG table. If it is present, use the settings for 1859 * domain (segment) 0 to setup PCI config space access via the memory 1860 * map. 1861 */ 1862static void 1863acpi_enable_pcie(void) 1864{ 1865 ACPI_TABLE_HEADER *hdr; 1866 ACPI_MCFG_ALLOCATION *alloc, *end; 1867 ACPI_STATUS status; 1868 1869 status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr); 1870 if (ACPI_FAILURE(status)) 1871 return; 1872 1873 end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length); 1874 alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1); 1875 while (alloc < end) { 1876 if (alloc->PciSegment == 0) { 1877 pcie_cfgregopen(alloc->Address, alloc->StartBusNumber, 1878 alloc->EndBusNumber); 1879 return; 1880 } 1881 alloc++; 1882 } 1883} 1884#endif 1885 1886/* 1887 * Scan all of the ACPI namespace and attach child devices. 1888 * 1889 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and 1890 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec. 1891 * However, in violation of the spec, some systems place their PCI link 1892 * devices in \, so we have to walk the whole namespace. We check the 1893 * type of namespace nodes, so this should be ok. 1894 */ 1895static void 1896acpi_probe_children(device_t bus) 1897{ 1898 1899 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1900 1901 /* 1902 * Scan the namespace and insert placeholders for all the devices that 1903 * we find. We also probe/attach any early devices. 1904 * 1905 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1906 * we want to create nodes for all devices, not just those that are 1907 * currently present. (This assumes that we don't want to create/remove 1908 * devices as they appear, which might be smarter.) 1909 */ 1910 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1911 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, acpi_probe_child, 1912 NULL, bus, NULL); 1913 1914 /* Pre-allocate resources for our rman from any sysresource devices. */ 1915 acpi_sysres_alloc(bus); 1916 1917 /* Reserve resources already allocated to children. */ 1918 acpi_reserve_resources(bus); 1919 1920 /* Create any static children by calling device identify methods. */ 1921 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1922 bus_generic_probe(bus); 1923 1924 /* Probe/attach all children, created statically and from the namespace. */ 1925 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "acpi bus_generic_attach\n")); 1926 bus_generic_attach(bus); 1927 1928 /* Attach wake sysctls. */ 1929 acpi_wake_sysctl_walk(bus); 1930 1931 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1932 return_VOID; 1933} 1934 1935/* 1936 * Determine the probe order for a given device. 1937 */ 1938static void 1939acpi_probe_order(ACPI_HANDLE handle, int *order) 1940{ 1941 ACPI_OBJECT_TYPE type; 1942 1943 /* 1944 * 0. CPUs 1945 * 1. I/O port and memory system resource holders 1946 * 2. Clocks and timers (to handle early accesses) 1947 * 3. Embedded controllers (to handle early accesses) 1948 * 4. PCI Link Devices 1949 */ 1950 AcpiGetType(handle, &type); 1951 if (type == ACPI_TYPE_PROCESSOR) 1952 *order = 0; 1953 else if (acpi_MatchHid(handle, "PNP0C01") || 1954 acpi_MatchHid(handle, "PNP0C02")) 1955 *order = 1; 1956 else if (acpi_MatchHid(handle, "PNP0100") || 1957 acpi_MatchHid(handle, "PNP0103") || 1958 acpi_MatchHid(handle, "PNP0B00")) 1959 *order = 2; 1960 else if (acpi_MatchHid(handle, "PNP0C09")) 1961 *order = 3; 1962 else if (acpi_MatchHid(handle, "PNP0C0F")) 1963 *order = 4; 1964} 1965 1966/* 1967 * Evaluate a child device and determine whether we might attach a device to 1968 * it. 1969 */ 1970static ACPI_STATUS 1971acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1972{ 1973 struct acpi_prw_data prw; 1974 ACPI_OBJECT_TYPE type; 1975 ACPI_HANDLE h; 1976 device_t bus, child; 1977 char *handle_str; 1978 int order; 1979 1980 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1981 1982 if (acpi_disabled("children")) 1983 return_ACPI_STATUS (AE_OK); 1984 1985 /* Skip this device if we think we'll have trouble with it. */ 1986 if (acpi_avoid(handle)) 1987 return_ACPI_STATUS (AE_OK); 1988 1989 bus = (device_t)context; 1990 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1991 handle_str = acpi_name(handle); 1992 switch (type) { 1993 case ACPI_TYPE_DEVICE: 1994 /* 1995 * Since we scan from \, be sure to skip system scope objects. 1996 * \_SB_ and \_TZ_ are defined in ACPICA as devices to work around 1997 * BIOS bugs. For example, \_SB_ is to allow \_SB_._INI to be run 1998 * during the initialization and \_TZ_ is to support Notify() on it. 1999 */ 2000 if (strcmp(handle_str, "\\_SB_") == 0 || 2001 strcmp(handle_str, "\\_TZ_") == 0) 2002 break; 2003 if (acpi_parse_prw(handle, &prw) == 0) 2004 AcpiSetupGpeForWake(handle, prw.gpe_handle, prw.gpe_bit); 2005 2006 /* 2007 * Ignore devices that do not have a _HID or _CID. They should 2008 * be discovered by other buses (e.g. the PCI bus driver). 2009 */ 2010 if (!acpi_has_hid(handle)) 2011 break; 2012 /* FALLTHROUGH */ 2013 case ACPI_TYPE_PROCESSOR: 2014 case ACPI_TYPE_THERMAL: 2015 case ACPI_TYPE_POWER: 2016 /* 2017 * Create a placeholder device for this node. Sort the 2018 * placeholder so that the probe/attach passes will run 2019 * breadth-first. Orders less than ACPI_DEV_BASE_ORDER 2020 * are reserved for special objects (i.e., system 2021 * resources). 2022 */ 2023 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str)); 2024 order = level * 10 + ACPI_DEV_BASE_ORDER; 2025 acpi_probe_order(handle, &order); 2026 child = BUS_ADD_CHILD(bus, order, NULL, -1); 2027 if (child == NULL) 2028 break; 2029 2030 /* Associate the handle with the device_t and vice versa. */ 2031 acpi_set_handle(child, handle); 2032 AcpiAttachData(handle, acpi_fake_objhandler, child); 2033 2034 /* 2035 * Check that the device is present. If it's not present, 2036 * leave it disabled (so that we have a device_t attached to 2037 * the handle, but we don't probe it). 2038 * 2039 * XXX PCI link devices sometimes report "present" but not 2040 * "functional" (i.e. if disabled). Go ahead and probe them 2041 * anyway since we may enable them later. 2042 */ 2043 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 2044 /* Never disable PCI link devices. */ 2045 if (acpi_MatchHid(handle, "PNP0C0F")) 2046 break; 2047 /* 2048 * Docking stations should remain enabled since the system 2049 * may be undocked at boot. 2050 */ 2051 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h))) 2052 break; 2053 2054 device_disable(child); 2055 break; 2056 } 2057 2058 /* 2059 * Get the device's resource settings and attach them. 2060 * Note that if the device has _PRS but no _CRS, we need 2061 * to decide when it's appropriate to try to configure the 2062 * device. Ignore the return value here; it's OK for the 2063 * device not to have any resources. 2064 */ 2065 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 2066 break; 2067 } 2068 } 2069 2070 return_ACPI_STATUS (AE_OK); 2071} 2072 2073/* 2074 * AcpiAttachData() requires an object handler but never uses it. This is a 2075 * placeholder object handler so we can store a device_t in an ACPI_HANDLE. 2076 */ 2077void 2078acpi_fake_objhandler(ACPI_HANDLE h, void *data) 2079{ 2080} 2081 2082static void 2083acpi_shutdown_final(void *arg, int howto) 2084{ 2085 struct acpi_softc *sc = (struct acpi_softc *)arg; 2086 register_t intr; 2087 ACPI_STATUS status; 2088 2089 /* 2090 * XXX Shutdown code should only run on the BSP (cpuid 0). 2091 * Some chipsets do not power off the system correctly if called from 2092 * an AP. 2093 */ 2094 if ((howto & RB_POWEROFF) != 0) { 2095 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 2096 if (ACPI_FAILURE(status)) { 2097 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2098 AcpiFormatException(status)); 2099 return; 2100 } 2101 device_printf(sc->acpi_dev, "Powering system off\n"); 2102 intr = intr_disable(); 2103 status = AcpiEnterSleepState(ACPI_STATE_S5); 2104 if (ACPI_FAILURE(status)) { 2105 intr_restore(intr); 2106 device_printf(sc->acpi_dev, "power-off failed - %s\n", 2107 AcpiFormatException(status)); 2108 } else { 2109 DELAY(1000000); 2110 intr_restore(intr); 2111 device_printf(sc->acpi_dev, "power-off failed - timeout\n"); 2112 } 2113 } else if ((howto & RB_HALT) == 0 && sc->acpi_handle_reboot) { 2114 /* Reboot using the reset register. */ 2115 status = AcpiReset(); 2116 if (ACPI_SUCCESS(status)) { 2117 DELAY(1000000); 2118 device_printf(sc->acpi_dev, "reset failed - timeout\n"); 2119 } else if (status != AE_NOT_EXIST) 2120 device_printf(sc->acpi_dev, "reset failed - %s\n", 2121 AcpiFormatException(status)); 2122 } else if (sc->acpi_do_disable && panicstr == NULL) { 2123 /* 2124 * Only disable ACPI if the user requested. On some systems, writing 2125 * the disable value to SMI_CMD hangs the system. 2126 */ 2127 device_printf(sc->acpi_dev, "Shutting down\n"); 2128 AcpiTerminate(); 2129 } 2130} 2131 2132static void 2133acpi_enable_fixed_events(struct acpi_softc *sc) 2134{ 2135 static int first_time = 1; 2136 2137 /* Enable and clear fixed events and install handlers. */ 2138 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) { 2139 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 2140 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 2141 acpi_event_power_button_sleep, sc); 2142 if (first_time) 2143 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 2144 } 2145 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) { 2146 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 2147 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 2148 acpi_event_sleep_button_sleep, sc); 2149 if (first_time) 2150 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 2151 } 2152 2153 first_time = 0; 2154} 2155 2156/* 2157 * Returns true if the device is actually present and should 2158 * be attached to. This requires the present, enabled, UI-visible 2159 * and diagnostics-passed bits to be set. 2160 */ 2161BOOLEAN 2162acpi_DeviceIsPresent(device_t dev) 2163{ 2164 ACPI_DEVICE_INFO *devinfo; 2165 ACPI_HANDLE h; 2166 BOOLEAN present; 2167 2168 if ((h = acpi_get_handle(dev)) == NULL || 2169 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2170 return (FALSE); 2171 2172 /* Onboard serial ports on certain AMD motherboards have an invalid _STA 2173 * method that always returns 0. Force them to always be treated as present. 2174 * 2175 * This may solely be a quirk of a preproduction BIOS. 2176 */ 2177 if (acpi_MatchHid(h, "AMDI0020") || acpi_MatchHid(h, "AMDI0010")) 2178 return (TRUE); 2179 2180 /* If no _STA method, must be present */ 2181 present = (devinfo->Valid & ACPI_VALID_STA) == 0 || 2182 ACPI_DEVICE_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE; 2183 2184 AcpiOsFree(devinfo); 2185 return (present); 2186} 2187 2188/* 2189 * Returns true if the battery is actually present and inserted. 2190 */ 2191BOOLEAN 2192acpi_BatteryIsPresent(device_t dev) 2193{ 2194 ACPI_DEVICE_INFO *devinfo; 2195 ACPI_HANDLE h; 2196 BOOLEAN present; 2197 2198 if ((h = acpi_get_handle(dev)) == NULL || 2199 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2200 return (FALSE); 2201 2202 /* If no _STA method, must be present */ 2203 present = (devinfo->Valid & ACPI_VALID_STA) == 0 || 2204 ACPI_BATTERY_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE; 2205 2206 AcpiOsFree(devinfo); 2207 return (present); 2208} 2209 2210/* 2211 * Returns true if a device has at least one valid device ID. 2212 */ 2213static BOOLEAN 2214acpi_has_hid(ACPI_HANDLE h) 2215{ 2216 ACPI_DEVICE_INFO *devinfo; 2217 BOOLEAN ret; 2218 2219 if (h == NULL || 2220 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2221 return (FALSE); 2222 2223 ret = FALSE; 2224 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 2225 ret = TRUE; 2226 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) 2227 if (devinfo->CompatibleIdList.Count > 0) 2228 ret = TRUE; 2229 2230 AcpiOsFree(devinfo); 2231 return (ret); 2232} 2233 2234/* 2235 * Match a HID string against a handle 2236 */ 2237BOOLEAN 2238acpi_MatchHid(ACPI_HANDLE h, const char *hid) 2239{ 2240 ACPI_DEVICE_INFO *devinfo; 2241 BOOLEAN ret; 2242 int i; 2243 2244 if (hid == NULL || h == NULL || 2245 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2246 return (FALSE); 2247 2248 ret = FALSE; 2249 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 2250 strcmp(hid, devinfo->HardwareId.String) == 0) 2251 ret = TRUE; 2252 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) 2253 for (i = 0; i < devinfo->CompatibleIdList.Count; i++) { 2254 if (strcmp(hid, devinfo->CompatibleIdList.Ids[i].String) == 0) { 2255 ret = TRUE; 2256 break; 2257 } 2258 } 2259 2260 AcpiOsFree(devinfo); 2261 return (ret); 2262} 2263 2264/* 2265 * Return the handle of a named object within our scope, ie. that of (parent) 2266 * or one if its parents. 2267 */ 2268ACPI_STATUS 2269acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 2270{ 2271 ACPI_HANDLE r; 2272 ACPI_STATUS status; 2273 2274 /* Walk back up the tree to the root */ 2275 for (;;) { 2276 status = AcpiGetHandle(parent, path, &r); 2277 if (ACPI_SUCCESS(status)) { 2278 *result = r; 2279 return (AE_OK); 2280 } 2281 /* XXX Return error here? */ 2282 if (status != AE_NOT_FOUND) 2283 return (AE_OK); 2284 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 2285 return (AE_NOT_FOUND); 2286 parent = r; 2287 } 2288} 2289 2290/* 2291 * Allocate a buffer with a preset data size. 2292 */ 2293ACPI_BUFFER * 2294acpi_AllocBuffer(int size) 2295{ 2296 ACPI_BUFFER *buf; 2297 2298 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 2299 return (NULL); 2300 buf->Length = size; 2301 buf->Pointer = (void *)(buf + 1); 2302 return (buf); 2303} 2304 2305ACPI_STATUS 2306acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 2307{ 2308 ACPI_OBJECT arg1; 2309 ACPI_OBJECT_LIST args; 2310 2311 arg1.Type = ACPI_TYPE_INTEGER; 2312 arg1.Integer.Value = number; 2313 args.Count = 1; 2314 args.Pointer = &arg1; 2315 2316 return (AcpiEvaluateObject(handle, path, &args, NULL)); 2317} 2318 2319/* 2320 * Evaluate a path that should return an integer. 2321 */ 2322ACPI_STATUS 2323acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 2324{ 2325 ACPI_STATUS status; 2326 ACPI_BUFFER buf; 2327 ACPI_OBJECT param; 2328 2329 if (handle == NULL) 2330 handle = ACPI_ROOT_OBJECT; 2331 2332 /* 2333 * Assume that what we've been pointed at is an Integer object, or 2334 * a method that will return an Integer. 2335 */ 2336 buf.Pointer = ¶m; 2337 buf.Length = sizeof(param); 2338 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2339 if (ACPI_SUCCESS(status)) { 2340 if (param.Type == ACPI_TYPE_INTEGER) 2341 *number = param.Integer.Value; 2342 else 2343 status = AE_TYPE; 2344 } 2345 2346 /* 2347 * In some applications, a method that's expected to return an Integer 2348 * may instead return a Buffer (probably to simplify some internal 2349 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 2350 * convert it into an Integer as best we can. 2351 * 2352 * This is a hack. 2353 */ 2354 if (status == AE_BUFFER_OVERFLOW) { 2355 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 2356 status = AE_NO_MEMORY; 2357 } else { 2358 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2359 if (ACPI_SUCCESS(status)) 2360 status = acpi_ConvertBufferToInteger(&buf, number); 2361 AcpiOsFree(buf.Pointer); 2362 } 2363 } 2364 return (status); 2365} 2366 2367ACPI_STATUS 2368acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 2369{ 2370 ACPI_OBJECT *p; 2371 UINT8 *val; 2372 int i; 2373 2374 p = (ACPI_OBJECT *)bufp->Pointer; 2375 if (p->Type == ACPI_TYPE_INTEGER) { 2376 *number = p->Integer.Value; 2377 return (AE_OK); 2378 } 2379 if (p->Type != ACPI_TYPE_BUFFER) 2380 return (AE_TYPE); 2381 if (p->Buffer.Length > sizeof(int)) 2382 return (AE_BAD_DATA); 2383 2384 *number = 0; 2385 val = p->Buffer.Pointer; 2386 for (i = 0; i < p->Buffer.Length; i++) 2387 *number += val[i] << (i * 8); 2388 return (AE_OK); 2389} 2390 2391/* 2392 * Iterate over the elements of an a package object, calling the supplied 2393 * function for each element. 2394 * 2395 * XXX possible enhancement might be to abort traversal on error. 2396 */ 2397ACPI_STATUS 2398acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 2399 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 2400{ 2401 ACPI_OBJECT *comp; 2402 int i; 2403 2404 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 2405 return (AE_BAD_PARAMETER); 2406 2407 /* Iterate over components */ 2408 i = 0; 2409 comp = pkg->Package.Elements; 2410 for (; i < pkg->Package.Count; i++, comp++) 2411 func(comp, arg); 2412 2413 return (AE_OK); 2414} 2415 2416/* 2417 * Find the (index)th resource object in a set. 2418 */ 2419ACPI_STATUS 2420acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 2421{ 2422 ACPI_RESOURCE *rp; 2423 int i; 2424 2425 rp = (ACPI_RESOURCE *)buf->Pointer; 2426 i = index; 2427 while (i-- > 0) { 2428 /* Range check */ 2429 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2430 return (AE_BAD_PARAMETER); 2431 2432 /* Check for terminator */ 2433 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2434 return (AE_NOT_FOUND); 2435 rp = ACPI_NEXT_RESOURCE(rp); 2436 } 2437 if (resp != NULL) 2438 *resp = rp; 2439 2440 return (AE_OK); 2441} 2442 2443/* 2444 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 2445 * 2446 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 2447 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 2448 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 2449 * resources. 2450 */ 2451#define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 2452 2453ACPI_STATUS 2454acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 2455{ 2456 ACPI_RESOURCE *rp; 2457 void *newp; 2458 2459 /* Initialise the buffer if necessary. */ 2460 if (buf->Pointer == NULL) { 2461 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 2462 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 2463 return (AE_NO_MEMORY); 2464 rp = (ACPI_RESOURCE *)buf->Pointer; 2465 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2466 rp->Length = ACPI_RS_SIZE_MIN; 2467 } 2468 if (res == NULL) 2469 return (AE_OK); 2470 2471 /* 2472 * Scan the current buffer looking for the terminator. 2473 * This will either find the terminator or hit the end 2474 * of the buffer and return an error. 2475 */ 2476 rp = (ACPI_RESOURCE *)buf->Pointer; 2477 for (;;) { 2478 /* Range check, don't go outside the buffer */ 2479 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2480 return (AE_BAD_PARAMETER); 2481 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2482 break; 2483 rp = ACPI_NEXT_RESOURCE(rp); 2484 } 2485 2486 /* 2487 * Check the size of the buffer and expand if required. 2488 * 2489 * Required size is: 2490 * size of existing resources before terminator + 2491 * size of new resource and header + 2492 * size of terminator. 2493 * 2494 * Note that this loop should really only run once, unless 2495 * for some reason we are stuffing a *really* huge resource. 2496 */ 2497 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 2498 res->Length + ACPI_RS_SIZE_NO_DATA + 2499 ACPI_RS_SIZE_MIN) >= buf->Length) { 2500 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 2501 return (AE_NO_MEMORY); 2502 bcopy(buf->Pointer, newp, buf->Length); 2503 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 2504 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 2505 AcpiOsFree(buf->Pointer); 2506 buf->Pointer = newp; 2507 buf->Length += buf->Length; 2508 } 2509 2510 /* Insert the new resource. */ 2511 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA); 2512 2513 /* And add the terminator. */ 2514 rp = ACPI_NEXT_RESOURCE(rp); 2515 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2516 rp->Length = ACPI_RS_SIZE_MIN; 2517 2518 return (AE_OK); 2519} 2520 2521ACPI_STATUS 2522acpi_EvaluateOSC(ACPI_HANDLE handle, uint8_t *uuid, int revision, int count, 2523 uint32_t *caps_in, uint32_t *caps_out, bool query) 2524{ 2525 ACPI_OBJECT arg[4], *ret; 2526 ACPI_OBJECT_LIST arglist; 2527 ACPI_BUFFER buf; 2528 ACPI_STATUS status; 2529 2530 arglist.Pointer = arg; 2531 arglist.Count = 4; 2532 arg[0].Type = ACPI_TYPE_BUFFER; 2533 arg[0].Buffer.Length = ACPI_UUID_LENGTH; 2534 arg[0].Buffer.Pointer = uuid; 2535 arg[1].Type = ACPI_TYPE_INTEGER; 2536 arg[1].Integer.Value = revision; 2537 arg[2].Type = ACPI_TYPE_INTEGER; 2538 arg[2].Integer.Value = count; 2539 arg[3].Type = ACPI_TYPE_BUFFER; 2540 arg[3].Buffer.Length = count * sizeof(*caps_in); 2541 arg[3].Buffer.Pointer = (uint8_t *)caps_in; 2542 caps_in[0] = query ? 1 : 0; 2543 buf.Pointer = NULL; 2544 buf.Length = ACPI_ALLOCATE_BUFFER; 2545 status = AcpiEvaluateObjectTyped(handle, "_OSC", &arglist, &buf, 2546 ACPI_TYPE_BUFFER); 2547 if (ACPI_FAILURE(status)) 2548 return (status); 2549 if (caps_out != NULL) { 2550 ret = buf.Pointer; 2551 if (ret->Buffer.Length != count * sizeof(*caps_out)) { 2552 AcpiOsFree(buf.Pointer); 2553 return (AE_BUFFER_OVERFLOW); 2554 } 2555 bcopy(ret->Buffer.Pointer, caps_out, ret->Buffer.Length); 2556 } 2557 AcpiOsFree(buf.Pointer); 2558 return (status); 2559} 2560 2561/* 2562 * Set interrupt model. 2563 */ 2564ACPI_STATUS 2565acpi_SetIntrModel(int model) 2566{ 2567 2568 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 2569} 2570 2571/* 2572 * Walk subtables of a table and call a callback routine for each 2573 * subtable. The caller should provide the first subtable and a 2574 * pointer to the end of the table. This can be used to walk tables 2575 * such as MADT and SRAT that use subtable entries. 2576 */ 2577void 2578acpi_walk_subtables(void *first, void *end, acpi_subtable_handler *handler, 2579 void *arg) 2580{ 2581 ACPI_SUBTABLE_HEADER *entry; 2582 2583 for (entry = first; (void *)entry < end; ) { 2584 /* Avoid an infinite loop if we hit a bogus entry. */ 2585 if (entry->Length < sizeof(ACPI_SUBTABLE_HEADER)) 2586 return; 2587 2588 handler(entry, arg); 2589 entry = ACPI_ADD_PTR(ACPI_SUBTABLE_HEADER, entry, entry->Length); 2590 } 2591} 2592 2593/* 2594 * DEPRECATED. This interface has serious deficiencies and will be 2595 * removed. 2596 * 2597 * Immediately enter the sleep state. In the old model, acpiconf(8) ran 2598 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this. 2599 */ 2600ACPI_STATUS 2601acpi_SetSleepState(struct acpi_softc *sc, int state) 2602{ 2603 static int once; 2604 2605 if (!once) { 2606 device_printf(sc->acpi_dev, 2607"warning: acpi_SetSleepState() deprecated, need to update your software\n"); 2608 once = 1; 2609 } 2610 return (acpi_EnterSleepState(sc, state)); 2611} 2612 2613#if defined(__amd64__) || defined(__i386__) 2614static void 2615acpi_sleep_force_task(void *context) 2616{ 2617 struct acpi_softc *sc = (struct acpi_softc *)context; 2618 2619 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2620 device_printf(sc->acpi_dev, "force sleep state S%d failed\n", 2621 sc->acpi_next_sstate); 2622} 2623 2624static void 2625acpi_sleep_force(void *arg) 2626{ 2627 struct acpi_softc *sc = (struct acpi_softc *)arg; 2628 2629 device_printf(sc->acpi_dev, 2630 "suspend request timed out, forcing sleep now\n"); 2631 /* 2632 * XXX Suspending from callout causes freezes in DEVICE_SUSPEND(). 2633 * Suspend from acpi_task thread instead. 2634 */ 2635 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 2636 acpi_sleep_force_task, sc))) 2637 device_printf(sc->acpi_dev, "AcpiOsExecute() for sleeping failed\n"); 2638} 2639#endif 2640 2641/* 2642 * Request that the system enter the given suspend state. All /dev/apm 2643 * devices and devd(8) will be notified. Userland then has a chance to 2644 * save state and acknowledge the request. The system sleeps once all 2645 * acks are in. 2646 */ 2647int 2648acpi_ReqSleepState(struct acpi_softc *sc, int state) 2649{ 2650#if defined(__amd64__) || defined(__i386__) 2651 struct apm_clone_data *clone; 2652 ACPI_STATUS status; 2653 2654 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX) 2655 return (EINVAL); 2656 if (!acpi_sleep_states[state]) 2657 return (EOPNOTSUPP); 2658 2659 /* 2660 * If a reboot/shutdown/suspend request is already in progress or 2661 * suspend is blocked due to an upcoming shutdown, just return. 2662 */ 2663 if (rebooting || sc->acpi_next_sstate != 0 || suspend_blocked) { 2664 return (0); 2665 } 2666 2667 /* Wait until sleep is enabled. */ 2668 while (sc->acpi_sleep_disabled) { 2669 AcpiOsSleep(1000); 2670 } 2671 2672 ACPI_LOCK(acpi); 2673 2674 sc->acpi_next_sstate = state; 2675 2676 /* S5 (soft-off) should be entered directly with no waiting. */ 2677 if (state == ACPI_STATE_S5) { 2678 ACPI_UNLOCK(acpi); 2679 status = acpi_EnterSleepState(sc, state); 2680 return (ACPI_SUCCESS(status) ? 0 : ENXIO); 2681 } 2682 2683 /* Record the pending state and notify all apm devices. */ 2684 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2685 clone->notify_status = APM_EV_NONE; 2686 if ((clone->flags & ACPI_EVF_DEVD) == 0) { 2687 selwakeuppri(&clone->sel_read, PZERO); 2688 KNOTE_LOCKED(&clone->sel_read.si_note, 0); 2689 } 2690 } 2691 2692 /* If devd(8) is not running, immediately enter the sleep state. */ 2693 if (!devctl_process_running()) { 2694 ACPI_UNLOCK(acpi); 2695 status = acpi_EnterSleepState(sc, state); 2696 return (ACPI_SUCCESS(status) ? 0 : ENXIO); 2697 } 2698 2699 /* 2700 * Set a timeout to fire if userland doesn't ack the suspend request 2701 * in time. This way we still eventually go to sleep if we were 2702 * overheating or running low on battery, even if userland is hung. 2703 * We cancel this timeout once all userland acks are in or the 2704 * suspend request is aborted. 2705 */ 2706 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc); 2707 ACPI_UNLOCK(acpi); 2708 2709 /* Now notify devd(8) also. */ 2710 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state); 2711 2712 return (0); 2713#else 2714 /* This platform does not support acpi suspend/resume. */ 2715 return (EOPNOTSUPP); 2716#endif 2717} 2718 2719/* 2720 * Acknowledge (or reject) a pending sleep state. The caller has 2721 * prepared for suspend and is now ready for it to proceed. If the 2722 * error argument is non-zero, it indicates suspend should be cancelled 2723 * and gives an errno value describing why. Once all votes are in, 2724 * we suspend the system. 2725 */ 2726int 2727acpi_AckSleepState(struct apm_clone_data *clone, int error) 2728{ 2729#if defined(__amd64__) || defined(__i386__) 2730 struct acpi_softc *sc; 2731 int ret, sleeping; 2732 2733 /* If no pending sleep state, return an error. */ 2734 ACPI_LOCK(acpi); 2735 sc = clone->acpi_sc; 2736 if (sc->acpi_next_sstate == 0) { 2737 ACPI_UNLOCK(acpi); 2738 return (ENXIO); 2739 } 2740 2741 /* Caller wants to abort suspend process. */ 2742 if (error) { 2743 sc->acpi_next_sstate = 0; 2744 callout_stop(&sc->susp_force_to); 2745 device_printf(sc->acpi_dev, 2746 "listener on %s cancelled the pending suspend\n", 2747 devtoname(clone->cdev)); 2748 ACPI_UNLOCK(acpi); 2749 return (0); 2750 } 2751 2752 /* 2753 * Mark this device as acking the suspend request. Then, walk through 2754 * all devices, seeing if they agree yet. We only count devices that 2755 * are writable since read-only devices couldn't ack the request. 2756 */ 2757 sleeping = TRUE; 2758 clone->notify_status = APM_EV_ACKED; 2759 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2760 if ((clone->flags & ACPI_EVF_WRITE) != 0 && 2761 clone->notify_status != APM_EV_ACKED) { 2762 sleeping = FALSE; 2763 break; 2764 } 2765 } 2766 2767 /* If all devices have voted "yes", we will suspend now. */ 2768 if (sleeping) 2769 callout_stop(&sc->susp_force_to); 2770 ACPI_UNLOCK(acpi); 2771 ret = 0; 2772 if (sleeping) { 2773 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2774 ret = ENODEV; 2775 } 2776 return (ret); 2777#else 2778 /* This platform does not support acpi suspend/resume. */ 2779 return (EOPNOTSUPP); 2780#endif 2781} 2782 2783static void 2784acpi_sleep_enable(void *arg) 2785{ 2786 struct acpi_softc *sc = (struct acpi_softc *)arg; 2787 2788 ACPI_LOCK_ASSERT(acpi); 2789 2790 /* Reschedule if the system is not fully up and running. */ 2791 if (!AcpiGbl_SystemAwakeAndRunning) { 2792 callout_schedule(&acpi_sleep_timer, hz * ACPI_MINIMUM_AWAKETIME); 2793 return; 2794 } 2795 2796 sc->acpi_sleep_disabled = FALSE; 2797} 2798 2799static ACPI_STATUS 2800acpi_sleep_disable(struct acpi_softc *sc) 2801{ 2802 ACPI_STATUS status; 2803 2804 /* Fail if the system is not fully up and running. */ 2805 if (!AcpiGbl_SystemAwakeAndRunning) 2806 return (AE_ERROR); 2807 2808 ACPI_LOCK(acpi); 2809 status = sc->acpi_sleep_disabled ? AE_ERROR : AE_OK; 2810 sc->acpi_sleep_disabled = TRUE; 2811 ACPI_UNLOCK(acpi); 2812 2813 return (status); 2814} 2815 2816enum acpi_sleep_state { 2817 ACPI_SS_NONE, 2818 ACPI_SS_GPE_SET, 2819 ACPI_SS_DEV_SUSPEND, 2820 ACPI_SS_SLP_PREP, 2821 ACPI_SS_SLEPT, 2822}; 2823 2824/* 2825 * Enter the desired system sleep state. 2826 * 2827 * Currently we support S1-S5 but S4 is only S4BIOS 2828 */ 2829static ACPI_STATUS 2830acpi_EnterSleepState(struct acpi_softc *sc, int state) 2831{ 2832 register_t intr; 2833 ACPI_STATUS status; 2834 ACPI_EVENT_STATUS power_button_status; 2835 enum acpi_sleep_state slp_state; 2836 int sleep_result; 2837 2838 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2839 2840 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX) 2841 return_ACPI_STATUS (AE_BAD_PARAMETER); 2842 if (!acpi_sleep_states[state]) { 2843 device_printf(sc->acpi_dev, "Sleep state S%d not supported by BIOS\n", 2844 state); 2845 return (AE_SUPPORT); 2846 } 2847 2848 /* Re-entry once we're suspending is not allowed. */ 2849 status = acpi_sleep_disable(sc); 2850 if (ACPI_FAILURE(status)) { 2851 device_printf(sc->acpi_dev, 2852 "suspend request ignored (not ready yet)\n"); 2853 return (status); 2854 } 2855 2856 if (state == ACPI_STATE_S5) { 2857 /* 2858 * Shut down cleanly and power off. This will call us back through the 2859 * shutdown handlers. 2860 */ 2861 shutdown_nice(RB_POWEROFF); 2862 return_ACPI_STATUS (AE_OK); 2863 } 2864 2865 EVENTHANDLER_INVOKE(power_suspend_early); 2866 stop_all_proc(); 2867 EVENTHANDLER_INVOKE(power_suspend); 2868 2869#ifdef EARLY_AP_STARTUP 2870 MPASS(mp_ncpus == 1 || smp_started); 2871 thread_lock(curthread); 2872 sched_bind(curthread, 0); 2873 thread_unlock(curthread); 2874#else 2875 if (smp_started) { 2876 thread_lock(curthread); 2877 sched_bind(curthread, 0); 2878 thread_unlock(curthread); 2879 } 2880#endif 2881 2882 /* 2883 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE 2884 * drivers need this. 2885 */ 2886 mtx_lock(&Giant); 2887 2888 slp_state = ACPI_SS_NONE; 2889 2890 sc->acpi_sstate = state; 2891 2892 /* Enable any GPEs as appropriate and requested by the user. */ 2893 acpi_wake_prep_walk(state); 2894 slp_state = ACPI_SS_GPE_SET; 2895 2896 /* 2897 * Inform all devices that we are going to sleep. If at least one 2898 * device fails, DEVICE_SUSPEND() automatically resumes the tree. 2899 * 2900 * XXX Note that a better two-pass approach with a 'veto' pass 2901 * followed by a "real thing" pass would be better, but the current 2902 * bus interface does not provide for this. 2903 */ 2904 if (DEVICE_SUSPEND(root_bus) != 0) { 2905 device_printf(sc->acpi_dev, "device_suspend failed\n"); 2906 goto backout; 2907 } 2908 slp_state = ACPI_SS_DEV_SUSPEND; 2909 2910 status = AcpiEnterSleepStatePrep(state); 2911 if (ACPI_FAILURE(status)) { 2912 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2913 AcpiFormatException(status)); 2914 goto backout; 2915 } 2916 slp_state = ACPI_SS_SLP_PREP; 2917 2918 if (sc->acpi_sleep_delay > 0) 2919 DELAY(sc->acpi_sleep_delay * 1000000); 2920 2921 suspendclock(); 2922 intr = intr_disable(); 2923 if (state != ACPI_STATE_S1) { 2924 sleep_result = acpi_sleep_machdep(sc, state); 2925 acpi_wakeup_machdep(sc, state, sleep_result, 0); 2926 2927 /* 2928 * XXX According to ACPI specification SCI_EN bit should be restored 2929 * by ACPI platform (BIOS, firmware) to its pre-sleep state. 2930 * Unfortunately some BIOSes fail to do that and that leads to 2931 * unexpected and serious consequences during wake up like a system 2932 * getting stuck in SMI handlers. 2933 * This hack is picked up from Linux, which claims that it follows 2934 * Windows behavior. 2935 */ 2936 if (sleep_result == 1 && state != ACPI_STATE_S4) 2937 AcpiWriteBitRegister(ACPI_BITREG_SCI_ENABLE, ACPI_ENABLE_EVENT); 2938 2939 if (sleep_result == 1 && state == ACPI_STATE_S3) { 2940 /* 2941 * Prevent mis-interpretation of the wakeup by power button 2942 * as a request for power off. 2943 * Ideally we should post an appropriate wakeup event, 2944 * perhaps using acpi_event_power_button_wake or alike. 2945 * 2946 * Clearing of power button status after wakeup is mandated 2947 * by ACPI specification in section "Fixed Power Button". 2948 * 2949 * XXX As of ACPICA 20121114 AcpiGetEventStatus provides 2950 * status as 0/1 corressponding to inactive/active despite 2951 * its type being ACPI_EVENT_STATUS. In other words, 2952 * we should not test for ACPI_EVENT_FLAG_SET for time being. 2953 */ 2954 if (ACPI_SUCCESS(AcpiGetEventStatus(ACPI_EVENT_POWER_BUTTON, 2955 &power_button_status)) && power_button_status != 0) { 2956 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 2957 device_printf(sc->acpi_dev, 2958 "cleared fixed power button status\n"); 2959 } 2960 } 2961 2962 intr_restore(intr); 2963 2964 /* call acpi_wakeup_machdep() again with interrupt enabled */ 2965 acpi_wakeup_machdep(sc, state, sleep_result, 1); 2966 2967 AcpiLeaveSleepStatePrep(state); 2968 2969 if (sleep_result == -1) 2970 goto backout; 2971 2972 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 2973 if (state == ACPI_STATE_S4) 2974 AcpiEnable(); 2975 } else { 2976 status = AcpiEnterSleepState(state); 2977 intr_restore(intr); 2978 AcpiLeaveSleepStatePrep(state); 2979 if (ACPI_FAILURE(status)) { 2980 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 2981 AcpiFormatException(status)); 2982 goto backout; 2983 } 2984 } 2985 slp_state = ACPI_SS_SLEPT; 2986 2987 /* 2988 * Back out state according to how far along we got in the suspend 2989 * process. This handles both the error and success cases. 2990 */ 2991backout: 2992 if (slp_state >= ACPI_SS_SLP_PREP) 2993 resumeclock(); 2994 if (slp_state >= ACPI_SS_GPE_SET) { 2995 acpi_wake_prep_walk(state); 2996 sc->acpi_sstate = ACPI_STATE_S0; 2997 } 2998 if (slp_state >= ACPI_SS_DEV_SUSPEND) 2999 DEVICE_RESUME(root_bus); 3000 if (slp_state >= ACPI_SS_SLP_PREP) 3001 AcpiLeaveSleepState(state); 3002 if (slp_state >= ACPI_SS_SLEPT) { 3003#if defined(__i386__) || defined(__amd64__) 3004 /* NB: we are still using ACPI timecounter at this point. */ 3005 resume_TSC(); 3006#endif 3007 acpi_resync_clock(sc); 3008 acpi_enable_fixed_events(sc); 3009 } 3010 sc->acpi_next_sstate = 0; 3011 3012 mtx_unlock(&Giant); 3013 3014#ifdef EARLY_AP_STARTUP 3015 thread_lock(curthread); 3016 sched_unbind(curthread); 3017 thread_unlock(curthread); 3018#else 3019 if (smp_started) { 3020 thread_lock(curthread); 3021 sched_unbind(curthread); 3022 thread_unlock(curthread); 3023 } 3024#endif 3025 3026 resume_all_proc(); 3027 3028 EVENTHANDLER_INVOKE(power_resume); 3029 3030 /* Allow another sleep request after a while. */ 3031 callout_schedule(&acpi_sleep_timer, hz * ACPI_MINIMUM_AWAKETIME); 3032 3033 /* Run /etc/rc.resume after we are back. */ 3034 if (devctl_process_running()) 3035 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state); 3036 3037 return_ACPI_STATUS (status); 3038} 3039 3040static void 3041acpi_resync_clock(struct acpi_softc *sc) 3042{ 3043#ifdef __amd64__ 3044 if (!acpi_reset_clock) 3045 return; 3046 3047 /* 3048 * Warm up timecounter again and reset system clock. 3049 */ 3050 (void)timecounter->tc_get_timecount(timecounter); 3051 (void)timecounter->tc_get_timecount(timecounter); 3052 inittodr(time_second + sc->acpi_sleep_delay); 3053#endif 3054} 3055 3056/* Enable or disable the device's wake GPE. */ 3057int 3058acpi_wake_set_enable(device_t dev, int enable) 3059{ 3060 struct acpi_prw_data prw; 3061 ACPI_STATUS status; 3062 int flags; 3063 3064 /* Make sure the device supports waking the system and get the GPE. */ 3065 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 3066 return (ENXIO); 3067 3068 flags = acpi_get_flags(dev); 3069 if (enable) { 3070 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 3071 ACPI_GPE_ENABLE); 3072 if (ACPI_FAILURE(status)) { 3073 device_printf(dev, "enable wake failed\n"); 3074 return (ENXIO); 3075 } 3076 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); 3077 } else { 3078 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 3079 ACPI_GPE_DISABLE); 3080 if (ACPI_FAILURE(status)) { 3081 device_printf(dev, "disable wake failed\n"); 3082 return (ENXIO); 3083 } 3084 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); 3085 } 3086 3087 return (0); 3088} 3089 3090static int 3091acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate) 3092{ 3093 struct acpi_prw_data prw; 3094 device_t dev; 3095 3096 /* Check that this is a wake-capable device and get its GPE. */ 3097 if (acpi_parse_prw(handle, &prw) != 0) 3098 return (ENXIO); 3099 dev = acpi_get_device(handle); 3100 3101 /* 3102 * The destination sleep state must be less than (i.e., higher power) 3103 * or equal to the value specified by _PRW. If this GPE cannot be 3104 * enabled for the next sleep state, then disable it. If it can and 3105 * the user requested it be enabled, turn on any required power resources 3106 * and set _PSW. 3107 */ 3108 if (sstate > prw.lowest_wake) { 3109 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_DISABLE); 3110 if (bootverbose) 3111 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n", 3112 acpi_name(handle), sstate); 3113 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) { 3114 acpi_pwr_wake_enable(handle, 1); 3115 acpi_SetInteger(handle, "_PSW", 1); 3116 if (bootverbose) 3117 device_printf(dev, "wake_prep enabled for %s (S%d)\n", 3118 acpi_name(handle), sstate); 3119 } 3120 3121 return (0); 3122} 3123 3124static int 3125acpi_wake_run_prep(ACPI_HANDLE handle, int sstate) 3126{ 3127 struct acpi_prw_data prw; 3128 device_t dev; 3129 3130 /* 3131 * Check that this is a wake-capable device and get its GPE. Return 3132 * now if the user didn't enable this device for wake. 3133 */ 3134 if (acpi_parse_prw(handle, &prw) != 0) 3135 return (ENXIO); 3136 dev = acpi_get_device(handle); 3137 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0) 3138 return (0); 3139 3140 /* 3141 * If this GPE couldn't be enabled for the previous sleep state, it was 3142 * disabled before going to sleep so re-enable it. If it was enabled, 3143 * clear _PSW and turn off any power resources it used. 3144 */ 3145 if (sstate > prw.lowest_wake) { 3146 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_ENABLE); 3147 if (bootverbose) 3148 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle)); 3149 } else { 3150 acpi_SetInteger(handle, "_PSW", 0); 3151 acpi_pwr_wake_enable(handle, 0); 3152 if (bootverbose) 3153 device_printf(dev, "run_prep cleaned up for %s\n", 3154 acpi_name(handle)); 3155 } 3156 3157 return (0); 3158} 3159 3160static ACPI_STATUS 3161acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 3162{ 3163 int sstate; 3164 3165 /* If suspending, run the sleep prep function, otherwise wake. */ 3166 sstate = *(int *)context; 3167 if (AcpiGbl_SystemAwakeAndRunning) 3168 acpi_wake_sleep_prep(handle, sstate); 3169 else 3170 acpi_wake_run_prep(handle, sstate); 3171 return (AE_OK); 3172} 3173 3174/* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */ 3175static int 3176acpi_wake_prep_walk(int sstate) 3177{ 3178 ACPI_HANDLE sb_handle; 3179 3180 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) 3181 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100, 3182 acpi_wake_prep, NULL, &sstate, NULL); 3183 return (0); 3184} 3185 3186/* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */ 3187static int 3188acpi_wake_sysctl_walk(device_t dev) 3189{ 3190 int error, i, numdevs; 3191 device_t *devlist; 3192 device_t child; 3193 ACPI_STATUS status; 3194 3195 error = device_get_children(dev, &devlist, &numdevs); 3196 if (error != 0 || numdevs == 0) { 3197 if (numdevs == 0) 3198 free(devlist, M_TEMP); 3199 return (error); 3200 } 3201 for (i = 0; i < numdevs; i++) { 3202 child = devlist[i]; 3203 acpi_wake_sysctl_walk(child); 3204 if (!device_is_attached(child)) 3205 continue; 3206 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL); 3207 if (ACPI_SUCCESS(status)) { 3208 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child), 3209 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO, 3210 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0, 3211 acpi_wake_set_sysctl, "I", "Device set to wake the system"); 3212 } 3213 } 3214 free(devlist, M_TEMP); 3215 3216 return (0); 3217} 3218 3219/* Enable or disable wake from userland. */ 3220static int 3221acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS) 3222{ 3223 int enable, error; 3224 device_t dev; 3225 3226 dev = (device_t)arg1; 3227 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0; 3228 3229 error = sysctl_handle_int(oidp, &enable, 0, req); 3230 if (error != 0 || req->newptr == NULL) 3231 return (error); 3232 if (enable != 0 && enable != 1) 3233 return (EINVAL); 3234 3235 return (acpi_wake_set_enable(dev, enable)); 3236} 3237 3238/* Parse a device's _PRW into a structure. */ 3239int 3240acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) 3241{ 3242 ACPI_STATUS status; 3243 ACPI_BUFFER prw_buffer; 3244 ACPI_OBJECT *res, *res2; 3245 int error, i, power_count; 3246 3247 if (h == NULL || prw == NULL) 3248 return (EINVAL); 3249 3250 /* 3251 * The _PRW object (7.2.9) is only required for devices that have the 3252 * ability to wake the system from a sleeping state. 3253 */ 3254 error = EINVAL; 3255 prw_buffer.Pointer = NULL; 3256 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 3257 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 3258 if (ACPI_FAILURE(status)) 3259 return (ENOENT); 3260 res = (ACPI_OBJECT *)prw_buffer.Pointer; 3261 if (res == NULL) 3262 return (ENOENT); 3263 if (!ACPI_PKG_VALID(res, 2)) 3264 goto out; 3265 3266 /* 3267 * Element 1 of the _PRW object: 3268 * The lowest power system sleeping state that can be entered while still 3269 * providing wake functionality. The sleeping state being entered must 3270 * be less than (i.e., higher power) or equal to this value. 3271 */ 3272 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) 3273 goto out; 3274 3275 /* 3276 * Element 0 of the _PRW object: 3277 */ 3278 switch (res->Package.Elements[0].Type) { 3279 case ACPI_TYPE_INTEGER: 3280 /* 3281 * If the data type of this package element is numeric, then this 3282 * _PRW package element is the bit index in the GPEx_EN, in the 3283 * GPE blocks described in the FADT, of the enable bit that is 3284 * enabled for the wake event. 3285 */ 3286 prw->gpe_handle = NULL; 3287 prw->gpe_bit = res->Package.Elements[0].Integer.Value; 3288 error = 0; 3289 break; 3290 case ACPI_TYPE_PACKAGE: 3291 /* 3292 * If the data type of this package element is a package, then this 3293 * _PRW package element is itself a package containing two 3294 * elements. The first is an object reference to the GPE Block 3295 * device that contains the GPE that will be triggered by the wake 3296 * event. The second element is numeric and it contains the bit 3297 * index in the GPEx_EN, in the GPE Block referenced by the 3298 * first element in the package, of the enable bit that is enabled for 3299 * the wake event. 3300 * 3301 * For example, if this field is a package then it is of the form: 3302 * Package() {\_SB.PCI0.ISA.GPE, 2} 3303 */ 3304 res2 = &res->Package.Elements[0]; 3305 if (!ACPI_PKG_VALID(res2, 2)) 3306 goto out; 3307 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 3308 if (prw->gpe_handle == NULL) 3309 goto out; 3310 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) 3311 goto out; 3312 error = 0; 3313 break; 3314 default: 3315 goto out; 3316 } 3317 3318 /* Elements 2 to N of the _PRW object are power resources. */ 3319 power_count = res->Package.Count - 2; 3320 if (power_count > ACPI_PRW_MAX_POWERRES) { 3321 printf("ACPI device %s has too many power resources\n", acpi_name(h)); 3322 power_count = 0; 3323 } 3324 prw->power_res_count = power_count; 3325 for (i = 0; i < power_count; i++) 3326 prw->power_res[i] = res->Package.Elements[i]; 3327 3328out: 3329 if (prw_buffer.Pointer != NULL) 3330 AcpiOsFree(prw_buffer.Pointer); 3331 return (error); 3332} 3333 3334/* 3335 * ACPI Event Handlers 3336 */ 3337 3338/* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 3339 3340static void 3341acpi_system_eventhandler_sleep(void *arg, int state) 3342{ 3343 struct acpi_softc *sc = (struct acpi_softc *)arg; 3344 int ret; 3345 3346 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 3347 3348 /* Check if button action is disabled or unknown. */ 3349 if (state == ACPI_STATE_UNKNOWN) 3350 return; 3351 3352 /* Request that the system prepare to enter the given suspend state. */ 3353 ret = acpi_ReqSleepState(sc, state); 3354 if (ret != 0) 3355 device_printf(sc->acpi_dev, 3356 "request to enter state S%d failed (err %d)\n", state, ret); 3357 3358 return_VOID; 3359} 3360 3361static void 3362acpi_system_eventhandler_wakeup(void *arg, int state) 3363{ 3364 3365 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 3366 3367 /* Currently, nothing to do for wakeup. */ 3368 3369 return_VOID; 3370} 3371 3372/* 3373 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 3374 */ 3375static void 3376acpi_invoke_sleep_eventhandler(void *context) 3377{ 3378 3379 EVENTHANDLER_INVOKE(acpi_sleep_event, *(int *)context); 3380} 3381 3382static void 3383acpi_invoke_wake_eventhandler(void *context) 3384{ 3385 3386 EVENTHANDLER_INVOKE(acpi_wakeup_event, *(int *)context); 3387} 3388 3389UINT32 3390acpi_event_power_button_sleep(void *context) 3391{ 3392 struct acpi_softc *sc = (struct acpi_softc *)context; 3393 3394 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3395 3396 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3397 acpi_invoke_sleep_eventhandler, &sc->acpi_power_button_sx))) 3398 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3399 return_VALUE (ACPI_INTERRUPT_HANDLED); 3400} 3401 3402UINT32 3403acpi_event_power_button_wake(void *context) 3404{ 3405 struct acpi_softc *sc = (struct acpi_softc *)context; 3406 3407 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3408 3409 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3410 acpi_invoke_wake_eventhandler, &sc->acpi_power_button_sx))) 3411 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3412 return_VALUE (ACPI_INTERRUPT_HANDLED); 3413} 3414 3415UINT32 3416acpi_event_sleep_button_sleep(void *context) 3417{ 3418 struct acpi_softc *sc = (struct acpi_softc *)context; 3419 3420 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3421 3422 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3423 acpi_invoke_sleep_eventhandler, &sc->acpi_sleep_button_sx))) 3424 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3425 return_VALUE (ACPI_INTERRUPT_HANDLED); 3426} 3427 3428UINT32 3429acpi_event_sleep_button_wake(void *context) 3430{ 3431 struct acpi_softc *sc = (struct acpi_softc *)context; 3432 3433 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3434 3435 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3436 acpi_invoke_wake_eventhandler, &sc->acpi_sleep_button_sx))) 3437 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3438 return_VALUE (ACPI_INTERRUPT_HANDLED); 3439} 3440 3441/* 3442 * XXX This static buffer is suboptimal. There is no locking so only 3443 * use this for single-threaded callers. 3444 */ 3445char * 3446acpi_name(ACPI_HANDLE handle) 3447{ 3448 ACPI_BUFFER buf; 3449 static char data[256]; 3450 3451 buf.Length = sizeof(data); 3452 buf.Pointer = data; 3453 3454 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf))) 3455 return (data); 3456 return ("(unknown)"); 3457} 3458 3459/* 3460 * Debugging/bug-avoidance. Avoid trying to fetch info on various 3461 * parts of the namespace. 3462 */ 3463int 3464acpi_avoid(ACPI_HANDLE handle) 3465{ 3466 char *cp, *env, *np; 3467 int len; 3468 3469 np = acpi_name(handle); 3470 if (*np == '\\') 3471 np++; 3472 if ((env = kern_getenv("debug.acpi.avoid")) == NULL) 3473 return (0); 3474 3475 /* Scan the avoid list checking for a match */ 3476 cp = env; 3477 for (;;) { 3478 while (*cp != 0 && isspace(*cp)) 3479 cp++; 3480 if (*cp == 0) 3481 break; 3482 len = 0; 3483 while (cp[len] != 0 && !isspace(cp[len])) 3484 len++; 3485 if (!strncmp(cp, np, len)) { 3486 freeenv(env); 3487 return(1); 3488 } 3489 cp += len; 3490 } 3491 freeenv(env); 3492 3493 return (0); 3494} 3495 3496/* 3497 * Debugging/bug-avoidance. Disable ACPI subsystem components. 3498 */ 3499int 3500acpi_disabled(char *subsys) 3501{ 3502 char *cp, *env; 3503 int len; 3504 3505 if ((env = kern_getenv("debug.acpi.disabled")) == NULL) 3506 return (0); 3507 if (strcmp(env, "all") == 0) { 3508 freeenv(env); 3509 return (1); 3510 } 3511 3512 /* Scan the disable list, checking for a match. */ 3513 cp = env; 3514 for (;;) { 3515 while (*cp != '\0' && isspace(*cp)) 3516 cp++; 3517 if (*cp == '\0') 3518 break; 3519 len = 0; 3520 while (cp[len] != '\0' && !isspace(cp[len])) 3521 len++; 3522 if (strncmp(cp, subsys, len) == 0) { 3523 freeenv(env); 3524 return (1); 3525 } 3526 cp += len; 3527 } 3528 freeenv(env); 3529 3530 return (0); 3531} 3532 3533static void 3534acpi_lookup(void *arg, const char *name, device_t *dev) 3535{ 3536 ACPI_HANDLE handle; 3537 3538 if (*dev != NULL) 3539 return; 3540 3541 /* 3542 * Allow any handle name that is specified as an absolute path and 3543 * starts with '\'. We could restrict this to \_SB and friends, 3544 * but see acpi_probe_children() for notes on why we scan the entire 3545 * namespace for devices. 3546 * 3547 * XXX: The pathname argument to AcpiGetHandle() should be fixed to 3548 * be const. 3549 */ 3550 if (name[0] != '\\') 3551 return; 3552 if (ACPI_FAILURE(AcpiGetHandle(ACPI_ROOT_OBJECT, __DECONST(char *, name), 3553 &handle))) 3554 return; 3555 *dev = acpi_get_device(handle); 3556} 3557 3558/* 3559 * Control interface. 3560 * 3561 * We multiplex ioctls for all participating ACPI devices here. Individual 3562 * drivers wanting to be accessible via /dev/acpi should use the 3563 * register/deregister interface to make their handlers visible. 3564 */ 3565struct acpi_ioctl_hook 3566{ 3567 TAILQ_ENTRY(acpi_ioctl_hook) link; 3568 u_long cmd; 3569 acpi_ioctl_fn fn; 3570 void *arg; 3571}; 3572 3573static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 3574static int acpi_ioctl_hooks_initted; 3575 3576int 3577acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 3578{ 3579 struct acpi_ioctl_hook *hp; 3580 3581 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 3582 return (ENOMEM); 3583 hp->cmd = cmd; 3584 hp->fn = fn; 3585 hp->arg = arg; 3586 3587 ACPI_LOCK(acpi); 3588 if (acpi_ioctl_hooks_initted == 0) { 3589 TAILQ_INIT(&acpi_ioctl_hooks); 3590 acpi_ioctl_hooks_initted = 1; 3591 } 3592 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 3593 ACPI_UNLOCK(acpi); 3594 3595 return (0); 3596} 3597 3598void 3599acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 3600{ 3601 struct acpi_ioctl_hook *hp; 3602 3603 ACPI_LOCK(acpi); 3604 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 3605 if (hp->cmd == cmd && hp->fn == fn) 3606 break; 3607 3608 if (hp != NULL) { 3609 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 3610 free(hp, M_ACPIDEV); 3611 } 3612 ACPI_UNLOCK(acpi); 3613} 3614 3615static int 3616acpiopen(struct cdev *dev, int flag, int fmt, struct thread *td) 3617{ 3618 return (0); 3619} 3620 3621static int 3622acpiclose(struct cdev *dev, int flag, int fmt, struct thread *td) 3623{ 3624 return (0); 3625} 3626 3627static int 3628acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 3629{ 3630 struct acpi_softc *sc; 3631 struct acpi_ioctl_hook *hp; 3632 int error, state; 3633 3634 error = 0; 3635 hp = NULL; 3636 sc = dev->si_drv1; 3637 3638 /* 3639 * Scan the list of registered ioctls, looking for handlers. 3640 */ 3641 ACPI_LOCK(acpi); 3642 if (acpi_ioctl_hooks_initted) 3643 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 3644 if (hp->cmd == cmd) 3645 break; 3646 } 3647 ACPI_UNLOCK(acpi); 3648 if (hp) 3649 return (hp->fn(cmd, addr, hp->arg)); 3650 3651 /* 3652 * Core ioctls are not permitted for non-writable user. 3653 * Currently, other ioctls just fetch information. 3654 * Not changing system behavior. 3655 */ 3656 if ((flag & FWRITE) == 0) 3657 return (EPERM); 3658 3659 /* Core system ioctls. */ 3660 switch (cmd) { 3661 case ACPIIO_REQSLPSTATE: 3662 state = *(int *)addr; 3663 if (state != ACPI_STATE_S5) 3664 return (acpi_ReqSleepState(sc, state)); 3665 device_printf(sc->acpi_dev, "power off via acpi ioctl not supported\n"); 3666 error = EOPNOTSUPP; 3667 break; 3668 case ACPIIO_ACKSLPSTATE: 3669 error = *(int *)addr; 3670 error = acpi_AckSleepState(sc->acpi_clone, error); 3671 break; 3672 case ACPIIO_SETSLPSTATE: /* DEPRECATED */ 3673 state = *(int *)addr; 3674 if (state < ACPI_STATE_S0 || state > ACPI_S_STATES_MAX) 3675 return (EINVAL); 3676 if (!acpi_sleep_states[state]) 3677 return (EOPNOTSUPP); 3678 if (ACPI_FAILURE(acpi_SetSleepState(sc, state))) 3679 error = ENXIO; 3680 break; 3681 default: 3682 error = ENXIO; 3683 break; 3684 } 3685 3686 return (error); 3687} 3688 3689static int 3690acpi_sname2sstate(const char *sname) 3691{ 3692 int sstate; 3693 3694 if (toupper(sname[0]) == 'S') { 3695 sstate = sname[1] - '0'; 3696 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5 && 3697 sname[2] == '\0') 3698 return (sstate); 3699 } else if (strcasecmp(sname, "NONE") == 0) 3700 return (ACPI_STATE_UNKNOWN); 3701 return (-1); 3702} 3703 3704static const char * 3705acpi_sstate2sname(int sstate) 3706{ 3707 static const char *snames[] = { "S0", "S1", "S2", "S3", "S4", "S5" }; 3708 3709 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5) 3710 return (snames[sstate]); 3711 else if (sstate == ACPI_STATE_UNKNOWN) 3712 return ("NONE"); 3713 return (NULL); 3714} 3715 3716static int 3717acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3718{ 3719 int error; 3720 struct sbuf sb; 3721 UINT8 state; 3722 3723 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND); 3724 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++) 3725 if (acpi_sleep_states[state]) 3726 sbuf_printf(&sb, "%s ", acpi_sstate2sname(state)); 3727 sbuf_trim(&sb); 3728 sbuf_finish(&sb); 3729 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 3730 sbuf_delete(&sb); 3731 return (error); 3732} 3733 3734static int 3735acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3736{ 3737 char sleep_state[10]; 3738 int error, new_state, old_state; 3739 3740 old_state = *(int *)oidp->oid_arg1; 3741 strlcpy(sleep_state, acpi_sstate2sname(old_state), sizeof(sleep_state)); 3742 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 3743 if (error == 0 && req->newptr != NULL) { 3744 new_state = acpi_sname2sstate(sleep_state); 3745 if (new_state < ACPI_STATE_S1) 3746 return (EINVAL); 3747 if (new_state < ACPI_S_STATE_COUNT && !acpi_sleep_states[new_state]) 3748 return (EOPNOTSUPP); 3749 if (new_state != old_state) 3750 *(int *)oidp->oid_arg1 = new_state; 3751 } 3752 return (error); 3753} 3754 3755/* Inform devctl(4) when we receive a Notify. */ 3756void 3757acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 3758{ 3759 char notify_buf[16]; 3760 ACPI_BUFFER handle_buf; 3761 ACPI_STATUS status; 3762 3763 if (subsystem == NULL) 3764 return; 3765 3766 handle_buf.Pointer = NULL; 3767 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 3768 status = AcpiNsHandleToPathname(h, &handle_buf, FALSE); 3769 if (ACPI_FAILURE(status)) 3770 return; 3771 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 3772 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 3773 AcpiOsFree(handle_buf.Pointer); 3774} 3775 3776#ifdef ACPI_DEBUG 3777/* 3778 * Support for parsing debug options from the kernel environment. 3779 * 3780 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 3781 * by specifying the names of the bits in the debug.acpi.layer and 3782 * debug.acpi.level environment variables. Bits may be unset by 3783 * prefixing the bit name with !. 3784 */ 3785struct debugtag 3786{ 3787 char *name; 3788 UINT32 value; 3789}; 3790 3791static struct debugtag dbg_layer[] = { 3792 {"ACPI_UTILITIES", ACPI_UTILITIES}, 3793 {"ACPI_HARDWARE", ACPI_HARDWARE}, 3794 {"ACPI_EVENTS", ACPI_EVENTS}, 3795 {"ACPI_TABLES", ACPI_TABLES}, 3796 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 3797 {"ACPI_PARSER", ACPI_PARSER}, 3798 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 3799 {"ACPI_EXECUTER", ACPI_EXECUTER}, 3800 {"ACPI_RESOURCES", ACPI_RESOURCES}, 3801 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 3802 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 3803 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 3804 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 3805 3806 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 3807 {"ACPI_BATTERY", ACPI_BATTERY}, 3808 {"ACPI_BUS", ACPI_BUS}, 3809 {"ACPI_BUTTON", ACPI_BUTTON}, 3810 {"ACPI_EC", ACPI_EC}, 3811 {"ACPI_FAN", ACPI_FAN}, 3812 {"ACPI_POWERRES", ACPI_POWERRES}, 3813 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 3814 {"ACPI_THERMAL", ACPI_THERMAL}, 3815 {"ACPI_TIMER", ACPI_TIMER}, 3816 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 3817 {NULL, 0} 3818}; 3819 3820static struct debugtag dbg_level[] = { 3821 {"ACPI_LV_INIT", ACPI_LV_INIT}, 3822 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 3823 {"ACPI_LV_INFO", ACPI_LV_INFO}, 3824 {"ACPI_LV_REPAIR", ACPI_LV_REPAIR}, 3825 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 3826 3827 /* Trace verbosity level 1 [Standard Trace Level] */ 3828 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 3829 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 3830 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 3831 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 3832 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 3833 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 3834 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 3835 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 3836 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 3837 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 3838 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 3839 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 3840 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 3841 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 3842 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 3843 3844 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 3845 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 3846 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 3847 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 3848 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 3849 {"ACPI_LV_ALL", ACPI_LV_ALL}, 3850 3851 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 3852 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 3853 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 3854 {"ACPI_LV_IO", ACPI_LV_IO}, 3855 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 3856 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 3857 3858 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 3859 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 3860 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 3861 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 3862 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 3863 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 3864 {NULL, 0} 3865}; 3866 3867static void 3868acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 3869{ 3870 char *ep; 3871 int i, l; 3872 int set; 3873 3874 while (*cp) { 3875 if (isspace(*cp)) { 3876 cp++; 3877 continue; 3878 } 3879 ep = cp; 3880 while (*ep && !isspace(*ep)) 3881 ep++; 3882 if (*cp == '!') { 3883 set = 0; 3884 cp++; 3885 if (cp == ep) 3886 continue; 3887 } else { 3888 set = 1; 3889 } 3890 l = ep - cp; 3891 for (i = 0; tag[i].name != NULL; i++) { 3892 if (!strncmp(cp, tag[i].name, l)) { 3893 if (set) 3894 *flag |= tag[i].value; 3895 else 3896 *flag &= ~tag[i].value; 3897 } 3898 } 3899 cp = ep; 3900 } 3901} 3902 3903static void 3904acpi_set_debugging(void *junk) 3905{ 3906 char *layer, *level; 3907 3908 if (cold) { 3909 AcpiDbgLayer = 0; 3910 AcpiDbgLevel = 0; 3911 } 3912 3913 layer = kern_getenv("debug.acpi.layer"); 3914 level = kern_getenv("debug.acpi.level"); 3915 if (layer == NULL && level == NULL) 3916 return; 3917 3918 printf("ACPI set debug"); 3919 if (layer != NULL) { 3920 if (strcmp("NONE", layer) != 0) 3921 printf(" layer '%s'", layer); 3922 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer); 3923 freeenv(layer); 3924 } 3925 if (level != NULL) { 3926 if (strcmp("NONE", level) != 0) 3927 printf(" level '%s'", level); 3928 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel); 3929 freeenv(level); 3930 } 3931 printf("\n"); 3932} 3933 3934SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 3935 NULL); 3936 3937static int 3938acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 3939{ 3940 int error, *dbg; 3941 struct debugtag *tag; 3942 struct sbuf sb; 3943 char temp[128]; 3944 3945 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 3946 return (ENOMEM); 3947 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 3948 tag = &dbg_layer[0]; 3949 dbg = &AcpiDbgLayer; 3950 } else { 3951 tag = &dbg_level[0]; 3952 dbg = &AcpiDbgLevel; 3953 } 3954 3955 /* Get old values if this is a get request. */ 3956 ACPI_SERIAL_BEGIN(acpi); 3957 if (*dbg == 0) { 3958 sbuf_cpy(&sb, "NONE"); 3959 } else if (req->newptr == NULL) { 3960 for (; tag->name != NULL; tag++) { 3961 if ((*dbg & tag->value) == tag->value) 3962 sbuf_printf(&sb, "%s ", tag->name); 3963 } 3964 } 3965 sbuf_trim(&sb); 3966 sbuf_finish(&sb); 3967 strlcpy(temp, sbuf_data(&sb), sizeof(temp)); 3968 sbuf_delete(&sb); 3969 3970 error = sysctl_handle_string(oidp, temp, sizeof(temp), req); 3971 3972 /* Check for error or no change */ 3973 if (error == 0 && req->newptr != NULL) { 3974 *dbg = 0; 3975 kern_setenv((char *)oidp->oid_arg1, temp); 3976 acpi_set_debugging(NULL); 3977 } 3978 ACPI_SERIAL_END(acpi); 3979 3980 return (error); 3981} 3982 3983SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 3984 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 3985SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 3986 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 3987#endif /* ACPI_DEBUG */ 3988 3989static int 3990acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS) 3991{ 3992 int error; 3993 int old; 3994 3995 old = acpi_debug_objects; 3996 error = sysctl_handle_int(oidp, &acpi_debug_objects, 0, req); 3997 if (error != 0 || req->newptr == NULL) 3998 return (error); 3999 if (old == acpi_debug_objects || (old && acpi_debug_objects)) 4000 return (0); 4001 4002 ACPI_SERIAL_BEGIN(acpi); 4003 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE; 4004 ACPI_SERIAL_END(acpi); 4005 4006 return (0); 4007} 4008 4009static int 4010acpi_parse_interfaces(char *str, struct acpi_interface *iface) 4011{ 4012 char *p; 4013 size_t len; 4014 int i, j; 4015 4016 p = str; 4017 while (isspace(*p) || *p == ',') 4018 p++; 4019 len = strlen(p); 4020 if (len == 0) 4021 return (0); 4022 p = strdup(p, M_TEMP); 4023 for (i = 0; i < len; i++) 4024 if (p[i] == ',') 4025 p[i] = '\0'; 4026 i = j = 0; 4027 while (i < len) 4028 if (isspace(p[i]) || p[i] == '\0') 4029 i++; 4030 else { 4031 i += strlen(p + i) + 1; 4032 j++; 4033 } 4034 if (j == 0) { 4035 free(p, M_TEMP); 4036 return (0); 4037 } 4038 iface->data = malloc(sizeof(*iface->data) * j, M_TEMP, M_WAITOK); 4039 iface->num = j; 4040 i = j = 0; 4041 while (i < len) 4042 if (isspace(p[i]) || p[i] == '\0') 4043 i++; 4044 else { 4045 iface->data[j] = p + i; 4046 i += strlen(p + i) + 1; 4047 j++; 4048 } 4049 4050 return (j); 4051} 4052 4053static void 4054acpi_free_interfaces(struct acpi_interface *iface) 4055{ 4056 4057 free(iface->data[0], M_TEMP); 4058 free(iface->data, M_TEMP); 4059} 4060 4061static void 4062acpi_reset_interfaces(device_t dev) 4063{ 4064 struct acpi_interface list; 4065 ACPI_STATUS status; 4066 int i; 4067 4068 if (acpi_parse_interfaces(acpi_install_interface, &list) > 0) { 4069 for (i = 0; i < list.num; i++) { 4070 status = AcpiInstallInterface(list.data[i]); 4071 if (ACPI_FAILURE(status)) 4072 device_printf(dev, 4073 "failed to install _OSI(\"%s\"): %s\n", 4074 list.data[i], AcpiFormatException(status)); 4075 else if (bootverbose) 4076 device_printf(dev, "installed _OSI(\"%s\")\n", 4077 list.data[i]); 4078 } 4079 acpi_free_interfaces(&list); 4080 } 4081 if (acpi_parse_interfaces(acpi_remove_interface, &list) > 0) { 4082 for (i = 0; i < list.num; i++) { 4083 status = AcpiRemoveInterface(list.data[i]); 4084 if (ACPI_FAILURE(status)) 4085 device_printf(dev, 4086 "failed to remove _OSI(\"%s\"): %s\n", 4087 list.data[i], AcpiFormatException(status)); 4088 else if (bootverbose) 4089 device_printf(dev, "removed _OSI(\"%s\")\n", 4090 list.data[i]); 4091 } 4092 acpi_free_interfaces(&list); 4093 } 4094} 4095 4096static int 4097acpi_pm_func(u_long cmd, void *arg, ...) 4098{ 4099 int state, acpi_state; 4100 int error; 4101 struct acpi_softc *sc; 4102 va_list ap; 4103 4104 error = 0; 4105 switch (cmd) { 4106 case POWER_CMD_SUSPEND: 4107 sc = (struct acpi_softc *)arg; 4108 if (sc == NULL) { 4109 error = EINVAL; 4110 goto out; 4111 } 4112 4113 va_start(ap, arg); 4114 state = va_arg(ap, int); 4115 va_end(ap); 4116 4117 switch (state) { 4118 case POWER_SLEEP_STATE_STANDBY: 4119 acpi_state = sc->acpi_standby_sx; 4120 break; 4121 case POWER_SLEEP_STATE_SUSPEND: 4122 acpi_state = sc->acpi_suspend_sx; 4123 break; 4124 case POWER_SLEEP_STATE_HIBERNATE: 4125 acpi_state = ACPI_STATE_S4; 4126 break; 4127 default: 4128 error = EINVAL; 4129 goto out; 4130 } 4131 4132 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state))) 4133 error = ENXIO; 4134 break; 4135 default: 4136 error = EINVAL; 4137 goto out; 4138 } 4139 4140out: 4141 return (error); 4142} 4143 4144static void 4145acpi_pm_register(void *arg) 4146{ 4147 if (!cold || resource_disabled("acpi", 0)) 4148 return; 4149 4150 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 4151} 4152 4153SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 4154