acpi.c revision 346999
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 346999 2019-05-01 17:30:14Z jhb $"); 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 * Don't reserve resources for CPU devices. Some of these 1350 * resources need to be allocated as shareable, but reservations 1351 * are always non-shareable. 1352 */ 1353 if (device_get_devclass(child) == devclass_find("cpu")) 1354 return (0); 1355 1356 /* 1357 * Reserve the resource. 1358 * 1359 * XXX: Ignores failure for now. Failure here is probably a 1360 * BIOS/firmware bug? 1361 */ 1362 resource_list_reserve(rl, dev, child, type, &rid, start, end, count, 0); 1363 return (0); 1364} 1365 1366static struct resource * 1367acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 1368 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags) 1369{ 1370 ACPI_RESOURCE ares; 1371 struct acpi_device *ad; 1372 struct resource_list_entry *rle; 1373 struct resource_list *rl; 1374 struct resource *res; 1375 int isdefault = RMAN_IS_DEFAULT_RANGE(start, end); 1376 1377 /* 1378 * First attempt at allocating the resource. For direct children, 1379 * use resource_list_alloc() to handle reserved resources. For 1380 * other devices, pass the request up to our parent. 1381 */ 1382 if (bus == device_get_parent(child)) { 1383 ad = device_get_ivars(child); 1384 rl = &ad->ad_rl; 1385 1386 /* 1387 * Simulate the behavior of the ISA bus for direct children 1388 * devices. That is, if a non-default range is specified for 1389 * a resource that doesn't exist, use bus_set_resource() to 1390 * add the resource before allocating it. Note that these 1391 * resources will not be reserved. 1392 */ 1393 if (!isdefault && resource_list_find(rl, type, *rid) == NULL) 1394 resource_list_add(rl, type, *rid, start, end, count); 1395 res = resource_list_alloc(rl, bus, child, type, rid, start, end, count, 1396 flags); 1397 if (res != NULL && type == SYS_RES_IRQ) { 1398 /* 1399 * Since bus_config_intr() takes immediate effect, we cannot 1400 * configure the interrupt associated with a device when we 1401 * parse the resources but have to defer it until a driver 1402 * actually allocates the interrupt via bus_alloc_resource(). 1403 * 1404 * XXX: Should we handle the lookup failing? 1405 */ 1406 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares))) 1407 acpi_config_intr(child, &ares); 1408 } 1409 1410 /* 1411 * If this is an allocation of the "default" range for a given 1412 * RID, fetch the exact bounds for this resource from the 1413 * resource list entry to try to allocate the range from the 1414 * system resource regions. 1415 */ 1416 if (res == NULL && isdefault) { 1417 rle = resource_list_find(rl, type, *rid); 1418 if (rle != NULL) { 1419 start = rle->start; 1420 end = rle->end; 1421 count = rle->count; 1422 } 1423 } 1424 } else 1425 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid, 1426 start, end, count, flags); 1427 1428 /* 1429 * If the first attempt failed and this is an allocation of a 1430 * specific range, try to satisfy the request via a suballocation 1431 * from our system resource regions. 1432 */ 1433 if (res == NULL && start + count - 1 == end) 1434 res = acpi_alloc_sysres(child, type, rid, start, end, count, flags); 1435 return (res); 1436} 1437 1438/* 1439 * Attempt to allocate a specific resource range from the system 1440 * resource ranges. Note that we only handle memory and I/O port 1441 * system resources. 1442 */ 1443struct resource * 1444acpi_alloc_sysres(device_t child, int type, int *rid, rman_res_t start, 1445 rman_res_t end, rman_res_t count, u_int flags) 1446{ 1447 struct rman *rm; 1448 struct resource *res; 1449 1450 switch (type) { 1451 case SYS_RES_IOPORT: 1452 rm = &acpi_rman_io; 1453 break; 1454 case SYS_RES_MEMORY: 1455 rm = &acpi_rman_mem; 1456 break; 1457 default: 1458 return (NULL); 1459 } 1460 1461 KASSERT(start + count - 1 == end, ("wildcard resource range")); 1462 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE, 1463 child); 1464 if (res == NULL) 1465 return (NULL); 1466 1467 rman_set_rid(res, *rid); 1468 1469 /* If requested, activate the resource using the parent's method. */ 1470 if (flags & RF_ACTIVE) 1471 if (bus_activate_resource(child, type, *rid, res) != 0) { 1472 rman_release_resource(res); 1473 return (NULL); 1474 } 1475 1476 return (res); 1477} 1478 1479static int 1480acpi_is_resource_managed(int type, struct resource *r) 1481{ 1482 1483 /* We only handle memory and IO resources through rman. */ 1484 switch (type) { 1485 case SYS_RES_IOPORT: 1486 return (rman_is_region_manager(r, &acpi_rman_io)); 1487 case SYS_RES_MEMORY: 1488 return (rman_is_region_manager(r, &acpi_rman_mem)); 1489 } 1490 return (0); 1491} 1492 1493static int 1494acpi_adjust_resource(device_t bus, device_t child, int type, struct resource *r, 1495 rman_res_t start, rman_res_t end) 1496{ 1497 1498 if (acpi_is_resource_managed(type, r)) 1499 return (rman_adjust_resource(r, start, end)); 1500 return (bus_generic_adjust_resource(bus, child, type, r, start, end)); 1501} 1502 1503static int 1504acpi_release_resource(device_t bus, device_t child, int type, int rid, 1505 struct resource *r) 1506{ 1507 int ret; 1508 1509 /* 1510 * If this resource belongs to one of our internal managers, 1511 * deactivate it and release it to the local pool. 1512 */ 1513 if (acpi_is_resource_managed(type, r)) { 1514 if (rman_get_flags(r) & RF_ACTIVE) { 1515 ret = bus_deactivate_resource(child, type, rid, r); 1516 if (ret != 0) 1517 return (ret); 1518 } 1519 return (rman_release_resource(r)); 1520 } 1521 1522 return (bus_generic_rl_release_resource(bus, child, type, rid, r)); 1523} 1524 1525static void 1526acpi_delete_resource(device_t bus, device_t child, int type, int rid) 1527{ 1528 struct resource_list *rl; 1529 1530 rl = acpi_get_rlist(bus, child); 1531 if (resource_list_busy(rl, type, rid)) { 1532 device_printf(bus, "delete_resource: Resource still owned by child" 1533 " (type=%d, rid=%d)\n", type, rid); 1534 return; 1535 } 1536 resource_list_unreserve(rl, bus, child, type, rid); 1537 resource_list_delete(rl, type, rid); 1538} 1539 1540/* Allocate an IO port or memory resource, given its GAS. */ 1541int 1542acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas, 1543 struct resource **res, u_int flags) 1544{ 1545 int error, res_type; 1546 1547 error = ENOMEM; 1548 if (type == NULL || rid == NULL || gas == NULL || res == NULL) 1549 return (EINVAL); 1550 1551 /* We only support memory and IO spaces. */ 1552 switch (gas->SpaceId) { 1553 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1554 res_type = SYS_RES_MEMORY; 1555 break; 1556 case ACPI_ADR_SPACE_SYSTEM_IO: 1557 res_type = SYS_RES_IOPORT; 1558 break; 1559 default: 1560 return (EOPNOTSUPP); 1561 } 1562 1563 /* 1564 * If the register width is less than 8, assume the BIOS author means 1565 * it is a bit field and just allocate a byte. 1566 */ 1567 if (gas->BitWidth && gas->BitWidth < 8) 1568 gas->BitWidth = 8; 1569 1570 /* Validate the address after we're sure we support the space. */ 1571 if (gas->Address == 0 || gas->BitWidth == 0) 1572 return (EINVAL); 1573 1574 bus_set_resource(dev, res_type, *rid, gas->Address, 1575 gas->BitWidth / 8); 1576 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags); 1577 if (*res != NULL) { 1578 *type = res_type; 1579 error = 0; 1580 } else 1581 bus_delete_resource(dev, res_type, *rid); 1582 1583 return (error); 1584} 1585 1586/* Probe _HID and _CID for compatible ISA PNP ids. */ 1587static uint32_t 1588acpi_isa_get_logicalid(device_t dev) 1589{ 1590 ACPI_DEVICE_INFO *devinfo; 1591 ACPI_HANDLE h; 1592 uint32_t pnpid; 1593 1594 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1595 1596 /* Fetch and validate the HID. */ 1597 if ((h = acpi_get_handle(dev)) == NULL || 1598 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1599 return_VALUE (0); 1600 1601 pnpid = (devinfo->Valid & ACPI_VALID_HID) != 0 && 1602 devinfo->HardwareId.Length >= ACPI_EISAID_STRING_SIZE ? 1603 PNP_EISAID(devinfo->HardwareId.String) : 0; 1604 AcpiOsFree(devinfo); 1605 1606 return_VALUE (pnpid); 1607} 1608 1609static int 1610acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 1611{ 1612 ACPI_DEVICE_INFO *devinfo; 1613 ACPI_PNP_DEVICE_ID *ids; 1614 ACPI_HANDLE h; 1615 uint32_t *pnpid; 1616 int i, valid; 1617 1618 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1619 1620 pnpid = cids; 1621 1622 /* Fetch and validate the CID */ 1623 if ((h = acpi_get_handle(dev)) == NULL || 1624 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1625 return_VALUE (0); 1626 1627 if ((devinfo->Valid & ACPI_VALID_CID) == 0) { 1628 AcpiOsFree(devinfo); 1629 return_VALUE (0); 1630 } 1631 1632 if (devinfo->CompatibleIdList.Count < count) 1633 count = devinfo->CompatibleIdList.Count; 1634 ids = devinfo->CompatibleIdList.Ids; 1635 for (i = 0, valid = 0; i < count; i++) 1636 if (ids[i].Length >= ACPI_EISAID_STRING_SIZE && 1637 strncmp(ids[i].String, "PNP", 3) == 0) { 1638 *pnpid++ = PNP_EISAID(ids[i].String); 1639 valid++; 1640 } 1641 AcpiOsFree(devinfo); 1642 1643 return_VALUE (valid); 1644} 1645 1646static char * 1647acpi_device_id_probe(device_t bus, device_t dev, char **ids) 1648{ 1649 ACPI_HANDLE h; 1650 ACPI_OBJECT_TYPE t; 1651 int i; 1652 1653 h = acpi_get_handle(dev); 1654 if (ids == NULL || h == NULL) 1655 return (NULL); 1656 t = acpi_get_type(dev); 1657 if (t != ACPI_TYPE_DEVICE && t != ACPI_TYPE_PROCESSOR) 1658 return (NULL); 1659 1660 /* Try to match one of the array of IDs with a HID or CID. */ 1661 for (i = 0; ids[i] != NULL; i++) { 1662 if (acpi_MatchHid(h, ids[i])) 1663 return (ids[i]); 1664 } 1665 return (NULL); 1666} 1667 1668static ACPI_STATUS 1669acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname, 1670 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret) 1671{ 1672 ACPI_HANDLE h; 1673 1674 if (dev == NULL) 1675 h = ACPI_ROOT_OBJECT; 1676 else if ((h = acpi_get_handle(dev)) == NULL) 1677 return (AE_BAD_PARAMETER); 1678 return (AcpiEvaluateObject(h, pathname, parameters, ret)); 1679} 1680 1681int 1682acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate) 1683{ 1684 struct acpi_softc *sc; 1685 ACPI_HANDLE handle; 1686 ACPI_STATUS status; 1687 char sxd[8]; 1688 1689 handle = acpi_get_handle(dev); 1690 1691 /* 1692 * XXX If we find these devices, don't try to power them down. 1693 * The serial and IRDA ports on my T23 hang the system when 1694 * set to D3 and it appears that such legacy devices may 1695 * need special handling in their drivers. 1696 */ 1697 if (dstate == NULL || handle == NULL || 1698 acpi_MatchHid(handle, "PNP0500") || 1699 acpi_MatchHid(handle, "PNP0501") || 1700 acpi_MatchHid(handle, "PNP0502") || 1701 acpi_MatchHid(handle, "PNP0510") || 1702 acpi_MatchHid(handle, "PNP0511")) 1703 return (ENXIO); 1704 1705 /* 1706 * Override next state with the value from _SxD, if present. 1707 * Note illegal _S0D is evaluated because some systems expect this. 1708 */ 1709 sc = device_get_softc(bus); 1710 snprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate); 1711 status = acpi_GetInteger(handle, sxd, dstate); 1712 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { 1713 device_printf(dev, "failed to get %s on %s: %s\n", sxd, 1714 acpi_name(handle), AcpiFormatException(status)); 1715 return (ENXIO); 1716 } 1717 1718 return (0); 1719} 1720 1721/* Callback arg for our implementation of walking the namespace. */ 1722struct acpi_device_scan_ctx { 1723 acpi_scan_cb_t user_fn; 1724 void *arg; 1725 ACPI_HANDLE parent; 1726}; 1727 1728static ACPI_STATUS 1729acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval) 1730{ 1731 struct acpi_device_scan_ctx *ctx; 1732 device_t dev, old_dev; 1733 ACPI_STATUS status; 1734 ACPI_OBJECT_TYPE type; 1735 1736 /* 1737 * Skip this device if we think we'll have trouble with it or it is 1738 * the parent where the scan began. 1739 */ 1740 ctx = (struct acpi_device_scan_ctx *)arg; 1741 if (acpi_avoid(h) || h == ctx->parent) 1742 return (AE_OK); 1743 1744 /* If this is not a valid device type (e.g., a method), skip it. */ 1745 if (ACPI_FAILURE(AcpiGetType(h, &type))) 1746 return (AE_OK); 1747 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR && 1748 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER) 1749 return (AE_OK); 1750 1751 /* 1752 * Call the user function with the current device. If it is unchanged 1753 * afterwards, return. Otherwise, we update the handle to the new dev. 1754 */ 1755 old_dev = acpi_get_device(h); 1756 dev = old_dev; 1757 status = ctx->user_fn(h, &dev, level, ctx->arg); 1758 if (ACPI_FAILURE(status) || old_dev == dev) 1759 return (status); 1760 1761 /* Remove the old child and its connection to the handle. */ 1762 if (old_dev != NULL) { 1763 device_delete_child(device_get_parent(old_dev), old_dev); 1764 AcpiDetachData(h, acpi_fake_objhandler); 1765 } 1766 1767 /* Recreate the handle association if the user created a device. */ 1768 if (dev != NULL) 1769 AcpiAttachData(h, acpi_fake_objhandler, dev); 1770 1771 return (AE_OK); 1772} 1773 1774static ACPI_STATUS 1775acpi_device_scan_children(device_t bus, device_t dev, int max_depth, 1776 acpi_scan_cb_t user_fn, void *arg) 1777{ 1778 ACPI_HANDLE h; 1779 struct acpi_device_scan_ctx ctx; 1780 1781 if (acpi_disabled("children")) 1782 return (AE_OK); 1783 1784 if (dev == NULL) 1785 h = ACPI_ROOT_OBJECT; 1786 else if ((h = acpi_get_handle(dev)) == NULL) 1787 return (AE_BAD_PARAMETER); 1788 ctx.user_fn = user_fn; 1789 ctx.arg = arg; 1790 ctx.parent = h; 1791 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth, 1792 acpi_device_scan_cb, NULL, &ctx, NULL)); 1793} 1794 1795/* 1796 * Even though ACPI devices are not PCI, we use the PCI approach for setting 1797 * device power states since it's close enough to ACPI. 1798 */ 1799static int 1800acpi_set_powerstate(device_t child, int state) 1801{ 1802 ACPI_HANDLE h; 1803 ACPI_STATUS status; 1804 1805 h = acpi_get_handle(child); 1806 if (state < ACPI_STATE_D0 || state > ACPI_D_STATES_MAX) 1807 return (EINVAL); 1808 if (h == NULL) 1809 return (0); 1810 1811 /* Ignore errors if the power methods aren't present. */ 1812 status = acpi_pwr_switch_consumer(h, state); 1813 if (ACPI_SUCCESS(status)) { 1814 if (bootverbose) 1815 device_printf(child, "set ACPI power state D%d on %s\n", 1816 state, acpi_name(h)); 1817 } else if (status != AE_NOT_FOUND) 1818 device_printf(child, 1819 "failed to set ACPI power state D%d on %s: %s\n", state, 1820 acpi_name(h), AcpiFormatException(status)); 1821 1822 return (0); 1823} 1824 1825static int 1826acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 1827{ 1828 int result, cid_count, i; 1829 uint32_t lid, cids[8]; 1830 1831 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1832 1833 /* 1834 * ISA-style drivers attached to ACPI may persist and 1835 * probe manually if we return ENOENT. We never want 1836 * that to happen, so don't ever return it. 1837 */ 1838 result = ENXIO; 1839 1840 /* Scan the supplied IDs for a match */ 1841 lid = acpi_isa_get_logicalid(child); 1842 cid_count = acpi_isa_get_compatid(child, cids, 8); 1843 while (ids && ids->ip_id) { 1844 if (lid == ids->ip_id) { 1845 result = 0; 1846 goto out; 1847 } 1848 for (i = 0; i < cid_count; i++) { 1849 if (cids[i] == ids->ip_id) { 1850 result = 0; 1851 goto out; 1852 } 1853 } 1854 ids++; 1855 } 1856 1857 out: 1858 if (result == 0 && ids->ip_desc) 1859 device_set_desc(child, ids->ip_desc); 1860 1861 return_VALUE (result); 1862} 1863 1864#if defined(__i386__) || defined(__amd64__) 1865/* 1866 * Look for a MCFG table. If it is present, use the settings for 1867 * domain (segment) 0 to setup PCI config space access via the memory 1868 * map. 1869 */ 1870static void 1871acpi_enable_pcie(void) 1872{ 1873 ACPI_TABLE_HEADER *hdr; 1874 ACPI_MCFG_ALLOCATION *alloc, *end; 1875 ACPI_STATUS status; 1876 1877 status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr); 1878 if (ACPI_FAILURE(status)) 1879 return; 1880 1881 end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length); 1882 alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1); 1883 while (alloc < end) { 1884 if (alloc->PciSegment == 0) { 1885 pcie_cfgregopen(alloc->Address, alloc->StartBusNumber, 1886 alloc->EndBusNumber); 1887 return; 1888 } 1889 alloc++; 1890 } 1891} 1892#endif 1893 1894/* 1895 * Scan all of the ACPI namespace and attach child devices. 1896 * 1897 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and 1898 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec. 1899 * However, in violation of the spec, some systems place their PCI link 1900 * devices in \, so we have to walk the whole namespace. We check the 1901 * type of namespace nodes, so this should be ok. 1902 */ 1903static void 1904acpi_probe_children(device_t bus) 1905{ 1906 1907 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1908 1909 /* 1910 * Scan the namespace and insert placeholders for all the devices that 1911 * we find. We also probe/attach any early devices. 1912 * 1913 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1914 * we want to create nodes for all devices, not just those that are 1915 * currently present. (This assumes that we don't want to create/remove 1916 * devices as they appear, which might be smarter.) 1917 */ 1918 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1919 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, acpi_probe_child, 1920 NULL, bus, NULL); 1921 1922 /* Pre-allocate resources for our rman from any sysresource devices. */ 1923 acpi_sysres_alloc(bus); 1924 1925 /* Reserve resources already allocated to children. */ 1926 acpi_reserve_resources(bus); 1927 1928 /* Create any static children by calling device identify methods. */ 1929 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1930 bus_generic_probe(bus); 1931 1932 /* Probe/attach all children, created statically and from the namespace. */ 1933 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "acpi bus_generic_attach\n")); 1934 bus_generic_attach(bus); 1935 1936 /* Attach wake sysctls. */ 1937 acpi_wake_sysctl_walk(bus); 1938 1939 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1940 return_VOID; 1941} 1942 1943/* 1944 * Determine the probe order for a given device. 1945 */ 1946static void 1947acpi_probe_order(ACPI_HANDLE handle, int *order) 1948{ 1949 ACPI_OBJECT_TYPE type; 1950 1951 /* 1952 * 0. CPUs 1953 * 1. I/O port and memory system resource holders 1954 * 2. Clocks and timers (to handle early accesses) 1955 * 3. Embedded controllers (to handle early accesses) 1956 * 4. PCI Link Devices 1957 */ 1958 AcpiGetType(handle, &type); 1959 if (type == ACPI_TYPE_PROCESSOR) 1960 *order = 0; 1961 else if (acpi_MatchHid(handle, "PNP0C01") || 1962 acpi_MatchHid(handle, "PNP0C02")) 1963 *order = 1; 1964 else if (acpi_MatchHid(handle, "PNP0100") || 1965 acpi_MatchHid(handle, "PNP0103") || 1966 acpi_MatchHid(handle, "PNP0B00")) 1967 *order = 2; 1968 else if (acpi_MatchHid(handle, "PNP0C09")) 1969 *order = 3; 1970 else if (acpi_MatchHid(handle, "PNP0C0F")) 1971 *order = 4; 1972} 1973 1974/* 1975 * Evaluate a child device and determine whether we might attach a device to 1976 * it. 1977 */ 1978static ACPI_STATUS 1979acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1980{ 1981 struct acpi_prw_data prw; 1982 ACPI_OBJECT_TYPE type; 1983 ACPI_HANDLE h; 1984 device_t bus, child; 1985 char *handle_str; 1986 int order; 1987 1988 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1989 1990 if (acpi_disabled("children")) 1991 return_ACPI_STATUS (AE_OK); 1992 1993 /* Skip this device if we think we'll have trouble with it. */ 1994 if (acpi_avoid(handle)) 1995 return_ACPI_STATUS (AE_OK); 1996 1997 bus = (device_t)context; 1998 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1999 handle_str = acpi_name(handle); 2000 switch (type) { 2001 case ACPI_TYPE_DEVICE: 2002 /* 2003 * Since we scan from \, be sure to skip system scope objects. 2004 * \_SB_ and \_TZ_ are defined in ACPICA as devices to work around 2005 * BIOS bugs. For example, \_SB_ is to allow \_SB_._INI to be run 2006 * during the initialization and \_TZ_ is to support Notify() on it. 2007 */ 2008 if (strcmp(handle_str, "\\_SB_") == 0 || 2009 strcmp(handle_str, "\\_TZ_") == 0) 2010 break; 2011 if (acpi_parse_prw(handle, &prw) == 0) 2012 AcpiSetupGpeForWake(handle, prw.gpe_handle, prw.gpe_bit); 2013 2014 /* 2015 * Ignore devices that do not have a _HID or _CID. They should 2016 * be discovered by other buses (e.g. the PCI bus driver). 2017 */ 2018 if (!acpi_has_hid(handle)) 2019 break; 2020 /* FALLTHROUGH */ 2021 case ACPI_TYPE_PROCESSOR: 2022 case ACPI_TYPE_THERMAL: 2023 case ACPI_TYPE_POWER: 2024 /* 2025 * Create a placeholder device for this node. Sort the 2026 * placeholder so that the probe/attach passes will run 2027 * breadth-first. Orders less than ACPI_DEV_BASE_ORDER 2028 * are reserved for special objects (i.e., system 2029 * resources). 2030 */ 2031 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str)); 2032 order = level * 10 + ACPI_DEV_BASE_ORDER; 2033 acpi_probe_order(handle, &order); 2034 child = BUS_ADD_CHILD(bus, order, NULL, -1); 2035 if (child == NULL) 2036 break; 2037 2038 /* Associate the handle with the device_t and vice versa. */ 2039 acpi_set_handle(child, handle); 2040 AcpiAttachData(handle, acpi_fake_objhandler, child); 2041 2042 /* 2043 * Check that the device is present. If it's not present, 2044 * leave it disabled (so that we have a device_t attached to 2045 * the handle, but we don't probe it). 2046 * 2047 * XXX PCI link devices sometimes report "present" but not 2048 * "functional" (i.e. if disabled). Go ahead and probe them 2049 * anyway since we may enable them later. 2050 */ 2051 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 2052 /* Never disable PCI link devices. */ 2053 if (acpi_MatchHid(handle, "PNP0C0F")) 2054 break; 2055 /* 2056 * Docking stations should remain enabled since the system 2057 * may be undocked at boot. 2058 */ 2059 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h))) 2060 break; 2061 2062 device_disable(child); 2063 break; 2064 } 2065 2066 /* 2067 * Get the device's resource settings and attach them. 2068 * Note that if the device has _PRS but no _CRS, we need 2069 * to decide when it's appropriate to try to configure the 2070 * device. Ignore the return value here; it's OK for the 2071 * device not to have any resources. 2072 */ 2073 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 2074 break; 2075 } 2076 } 2077 2078 return_ACPI_STATUS (AE_OK); 2079} 2080 2081/* 2082 * AcpiAttachData() requires an object handler but never uses it. This is a 2083 * placeholder object handler so we can store a device_t in an ACPI_HANDLE. 2084 */ 2085void 2086acpi_fake_objhandler(ACPI_HANDLE h, void *data) 2087{ 2088} 2089 2090static void 2091acpi_shutdown_final(void *arg, int howto) 2092{ 2093 struct acpi_softc *sc = (struct acpi_softc *)arg; 2094 register_t intr; 2095 ACPI_STATUS status; 2096 2097 /* 2098 * XXX Shutdown code should only run on the BSP (cpuid 0). 2099 * Some chipsets do not power off the system correctly if called from 2100 * an AP. 2101 */ 2102 if ((howto & RB_POWEROFF) != 0) { 2103 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 2104 if (ACPI_FAILURE(status)) { 2105 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2106 AcpiFormatException(status)); 2107 return; 2108 } 2109 device_printf(sc->acpi_dev, "Powering system off\n"); 2110 intr = intr_disable(); 2111 status = AcpiEnterSleepState(ACPI_STATE_S5); 2112 if (ACPI_FAILURE(status)) { 2113 intr_restore(intr); 2114 device_printf(sc->acpi_dev, "power-off failed - %s\n", 2115 AcpiFormatException(status)); 2116 } else { 2117 DELAY(1000000); 2118 intr_restore(intr); 2119 device_printf(sc->acpi_dev, "power-off failed - timeout\n"); 2120 } 2121 } else if ((howto & RB_HALT) == 0 && sc->acpi_handle_reboot) { 2122 /* Reboot using the reset register. */ 2123 status = AcpiReset(); 2124 if (ACPI_SUCCESS(status)) { 2125 DELAY(1000000); 2126 device_printf(sc->acpi_dev, "reset failed - timeout\n"); 2127 } else if (status != AE_NOT_EXIST) 2128 device_printf(sc->acpi_dev, "reset failed - %s\n", 2129 AcpiFormatException(status)); 2130 } else if (sc->acpi_do_disable && panicstr == NULL) { 2131 /* 2132 * Only disable ACPI if the user requested. On some systems, writing 2133 * the disable value to SMI_CMD hangs the system. 2134 */ 2135 device_printf(sc->acpi_dev, "Shutting down\n"); 2136 AcpiTerminate(); 2137 } 2138} 2139 2140static void 2141acpi_enable_fixed_events(struct acpi_softc *sc) 2142{ 2143 static int first_time = 1; 2144 2145 /* Enable and clear fixed events and install handlers. */ 2146 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) { 2147 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 2148 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 2149 acpi_event_power_button_sleep, sc); 2150 if (first_time) 2151 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 2152 } 2153 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) { 2154 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 2155 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 2156 acpi_event_sleep_button_sleep, sc); 2157 if (first_time) 2158 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 2159 } 2160 2161 first_time = 0; 2162} 2163 2164/* 2165 * Returns true if the device is actually present and should 2166 * be attached to. This requires the present, enabled, UI-visible 2167 * and diagnostics-passed bits to be set. 2168 */ 2169BOOLEAN 2170acpi_DeviceIsPresent(device_t dev) 2171{ 2172 ACPI_DEVICE_INFO *devinfo; 2173 ACPI_HANDLE h; 2174 BOOLEAN present; 2175 2176 if ((h = acpi_get_handle(dev)) == NULL || 2177 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2178 return (FALSE); 2179 2180 /* Onboard serial ports on certain AMD motherboards have an invalid _STA 2181 * method that always returns 0. Force them to always be treated as present. 2182 * 2183 * This may solely be a quirk of a preproduction BIOS. 2184 */ 2185 if (acpi_MatchHid(h, "AMDI0020") || acpi_MatchHid(h, "AMDI0010")) 2186 return (TRUE); 2187 2188 /* If no _STA method, must be present */ 2189 present = (devinfo->Valid & ACPI_VALID_STA) == 0 || 2190 ACPI_DEVICE_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE; 2191 2192 AcpiOsFree(devinfo); 2193 return (present); 2194} 2195 2196/* 2197 * Returns true if the battery is actually present and inserted. 2198 */ 2199BOOLEAN 2200acpi_BatteryIsPresent(device_t dev) 2201{ 2202 ACPI_DEVICE_INFO *devinfo; 2203 ACPI_HANDLE h; 2204 BOOLEAN present; 2205 2206 if ((h = acpi_get_handle(dev)) == NULL || 2207 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2208 return (FALSE); 2209 2210 /* If no _STA method, must be present */ 2211 present = (devinfo->Valid & ACPI_VALID_STA) == 0 || 2212 ACPI_BATTERY_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE; 2213 2214 AcpiOsFree(devinfo); 2215 return (present); 2216} 2217 2218/* 2219 * Returns true if a device has at least one valid device ID. 2220 */ 2221static BOOLEAN 2222acpi_has_hid(ACPI_HANDLE h) 2223{ 2224 ACPI_DEVICE_INFO *devinfo; 2225 BOOLEAN ret; 2226 2227 if (h == NULL || 2228 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2229 return (FALSE); 2230 2231 ret = FALSE; 2232 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 2233 ret = TRUE; 2234 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) 2235 if (devinfo->CompatibleIdList.Count > 0) 2236 ret = TRUE; 2237 2238 AcpiOsFree(devinfo); 2239 return (ret); 2240} 2241 2242/* 2243 * Match a HID string against a handle 2244 */ 2245BOOLEAN 2246acpi_MatchHid(ACPI_HANDLE h, const char *hid) 2247{ 2248 ACPI_DEVICE_INFO *devinfo; 2249 BOOLEAN ret; 2250 int i; 2251 2252 if (hid == NULL || h == NULL || 2253 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2254 return (FALSE); 2255 2256 ret = FALSE; 2257 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 2258 strcmp(hid, devinfo->HardwareId.String) == 0) 2259 ret = TRUE; 2260 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) 2261 for (i = 0; i < devinfo->CompatibleIdList.Count; i++) { 2262 if (strcmp(hid, devinfo->CompatibleIdList.Ids[i].String) == 0) { 2263 ret = TRUE; 2264 break; 2265 } 2266 } 2267 2268 AcpiOsFree(devinfo); 2269 return (ret); 2270} 2271 2272/* 2273 * Return the handle of a named object within our scope, ie. that of (parent) 2274 * or one if its parents. 2275 */ 2276ACPI_STATUS 2277acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 2278{ 2279 ACPI_HANDLE r; 2280 ACPI_STATUS status; 2281 2282 /* Walk back up the tree to the root */ 2283 for (;;) { 2284 status = AcpiGetHandle(parent, path, &r); 2285 if (ACPI_SUCCESS(status)) { 2286 *result = r; 2287 return (AE_OK); 2288 } 2289 /* XXX Return error here? */ 2290 if (status != AE_NOT_FOUND) 2291 return (AE_OK); 2292 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 2293 return (AE_NOT_FOUND); 2294 parent = r; 2295 } 2296} 2297 2298/* 2299 * Allocate a buffer with a preset data size. 2300 */ 2301ACPI_BUFFER * 2302acpi_AllocBuffer(int size) 2303{ 2304 ACPI_BUFFER *buf; 2305 2306 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 2307 return (NULL); 2308 buf->Length = size; 2309 buf->Pointer = (void *)(buf + 1); 2310 return (buf); 2311} 2312 2313ACPI_STATUS 2314acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 2315{ 2316 ACPI_OBJECT arg1; 2317 ACPI_OBJECT_LIST args; 2318 2319 arg1.Type = ACPI_TYPE_INTEGER; 2320 arg1.Integer.Value = number; 2321 args.Count = 1; 2322 args.Pointer = &arg1; 2323 2324 return (AcpiEvaluateObject(handle, path, &args, NULL)); 2325} 2326 2327/* 2328 * Evaluate a path that should return an integer. 2329 */ 2330ACPI_STATUS 2331acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 2332{ 2333 ACPI_STATUS status; 2334 ACPI_BUFFER buf; 2335 ACPI_OBJECT param; 2336 2337 if (handle == NULL) 2338 handle = ACPI_ROOT_OBJECT; 2339 2340 /* 2341 * Assume that what we've been pointed at is an Integer object, or 2342 * a method that will return an Integer. 2343 */ 2344 buf.Pointer = ¶m; 2345 buf.Length = sizeof(param); 2346 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2347 if (ACPI_SUCCESS(status)) { 2348 if (param.Type == ACPI_TYPE_INTEGER) 2349 *number = param.Integer.Value; 2350 else 2351 status = AE_TYPE; 2352 } 2353 2354 /* 2355 * In some applications, a method that's expected to return an Integer 2356 * may instead return a Buffer (probably to simplify some internal 2357 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 2358 * convert it into an Integer as best we can. 2359 * 2360 * This is a hack. 2361 */ 2362 if (status == AE_BUFFER_OVERFLOW) { 2363 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 2364 status = AE_NO_MEMORY; 2365 } else { 2366 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2367 if (ACPI_SUCCESS(status)) 2368 status = acpi_ConvertBufferToInteger(&buf, number); 2369 AcpiOsFree(buf.Pointer); 2370 } 2371 } 2372 return (status); 2373} 2374 2375ACPI_STATUS 2376acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 2377{ 2378 ACPI_OBJECT *p; 2379 UINT8 *val; 2380 int i; 2381 2382 p = (ACPI_OBJECT *)bufp->Pointer; 2383 if (p->Type == ACPI_TYPE_INTEGER) { 2384 *number = p->Integer.Value; 2385 return (AE_OK); 2386 } 2387 if (p->Type != ACPI_TYPE_BUFFER) 2388 return (AE_TYPE); 2389 if (p->Buffer.Length > sizeof(int)) 2390 return (AE_BAD_DATA); 2391 2392 *number = 0; 2393 val = p->Buffer.Pointer; 2394 for (i = 0; i < p->Buffer.Length; i++) 2395 *number += val[i] << (i * 8); 2396 return (AE_OK); 2397} 2398 2399/* 2400 * Iterate over the elements of an a package object, calling the supplied 2401 * function for each element. 2402 * 2403 * XXX possible enhancement might be to abort traversal on error. 2404 */ 2405ACPI_STATUS 2406acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 2407 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 2408{ 2409 ACPI_OBJECT *comp; 2410 int i; 2411 2412 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 2413 return (AE_BAD_PARAMETER); 2414 2415 /* Iterate over components */ 2416 i = 0; 2417 comp = pkg->Package.Elements; 2418 for (; i < pkg->Package.Count; i++, comp++) 2419 func(comp, arg); 2420 2421 return (AE_OK); 2422} 2423 2424/* 2425 * Find the (index)th resource object in a set. 2426 */ 2427ACPI_STATUS 2428acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 2429{ 2430 ACPI_RESOURCE *rp; 2431 int i; 2432 2433 rp = (ACPI_RESOURCE *)buf->Pointer; 2434 i = index; 2435 while (i-- > 0) { 2436 /* Range check */ 2437 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2438 return (AE_BAD_PARAMETER); 2439 2440 /* Check for terminator */ 2441 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2442 return (AE_NOT_FOUND); 2443 rp = ACPI_NEXT_RESOURCE(rp); 2444 } 2445 if (resp != NULL) 2446 *resp = rp; 2447 2448 return (AE_OK); 2449} 2450 2451/* 2452 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 2453 * 2454 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 2455 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 2456 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 2457 * resources. 2458 */ 2459#define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 2460 2461ACPI_STATUS 2462acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 2463{ 2464 ACPI_RESOURCE *rp; 2465 void *newp; 2466 2467 /* Initialise the buffer if necessary. */ 2468 if (buf->Pointer == NULL) { 2469 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 2470 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 2471 return (AE_NO_MEMORY); 2472 rp = (ACPI_RESOURCE *)buf->Pointer; 2473 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2474 rp->Length = ACPI_RS_SIZE_MIN; 2475 } 2476 if (res == NULL) 2477 return (AE_OK); 2478 2479 /* 2480 * Scan the current buffer looking for the terminator. 2481 * This will either find the terminator or hit the end 2482 * of the buffer and return an error. 2483 */ 2484 rp = (ACPI_RESOURCE *)buf->Pointer; 2485 for (;;) { 2486 /* Range check, don't go outside the buffer */ 2487 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2488 return (AE_BAD_PARAMETER); 2489 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2490 break; 2491 rp = ACPI_NEXT_RESOURCE(rp); 2492 } 2493 2494 /* 2495 * Check the size of the buffer and expand if required. 2496 * 2497 * Required size is: 2498 * size of existing resources before terminator + 2499 * size of new resource and header + 2500 * size of terminator. 2501 * 2502 * Note that this loop should really only run once, unless 2503 * for some reason we are stuffing a *really* huge resource. 2504 */ 2505 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 2506 res->Length + ACPI_RS_SIZE_NO_DATA + 2507 ACPI_RS_SIZE_MIN) >= buf->Length) { 2508 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 2509 return (AE_NO_MEMORY); 2510 bcopy(buf->Pointer, newp, buf->Length); 2511 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 2512 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 2513 AcpiOsFree(buf->Pointer); 2514 buf->Pointer = newp; 2515 buf->Length += buf->Length; 2516 } 2517 2518 /* Insert the new resource. */ 2519 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA); 2520 2521 /* And add the terminator. */ 2522 rp = ACPI_NEXT_RESOURCE(rp); 2523 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2524 rp->Length = ACPI_RS_SIZE_MIN; 2525 2526 return (AE_OK); 2527} 2528 2529ACPI_STATUS 2530acpi_EvaluateOSC(ACPI_HANDLE handle, uint8_t *uuid, int revision, int count, 2531 uint32_t *caps_in, uint32_t *caps_out, bool query) 2532{ 2533 ACPI_OBJECT arg[4], *ret; 2534 ACPI_OBJECT_LIST arglist; 2535 ACPI_BUFFER buf; 2536 ACPI_STATUS status; 2537 2538 arglist.Pointer = arg; 2539 arglist.Count = 4; 2540 arg[0].Type = ACPI_TYPE_BUFFER; 2541 arg[0].Buffer.Length = ACPI_UUID_LENGTH; 2542 arg[0].Buffer.Pointer = uuid; 2543 arg[1].Type = ACPI_TYPE_INTEGER; 2544 arg[1].Integer.Value = revision; 2545 arg[2].Type = ACPI_TYPE_INTEGER; 2546 arg[2].Integer.Value = count; 2547 arg[3].Type = ACPI_TYPE_BUFFER; 2548 arg[3].Buffer.Length = count * sizeof(*caps_in); 2549 arg[3].Buffer.Pointer = (uint8_t *)caps_in; 2550 caps_in[0] = query ? 1 : 0; 2551 buf.Pointer = NULL; 2552 buf.Length = ACPI_ALLOCATE_BUFFER; 2553 status = AcpiEvaluateObjectTyped(handle, "_OSC", &arglist, &buf, 2554 ACPI_TYPE_BUFFER); 2555 if (ACPI_FAILURE(status)) 2556 return (status); 2557 if (caps_out != NULL) { 2558 ret = buf.Pointer; 2559 if (ret->Buffer.Length != count * sizeof(*caps_out)) { 2560 AcpiOsFree(buf.Pointer); 2561 return (AE_BUFFER_OVERFLOW); 2562 } 2563 bcopy(ret->Buffer.Pointer, caps_out, ret->Buffer.Length); 2564 } 2565 AcpiOsFree(buf.Pointer); 2566 return (status); 2567} 2568 2569/* 2570 * Set interrupt model. 2571 */ 2572ACPI_STATUS 2573acpi_SetIntrModel(int model) 2574{ 2575 2576 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 2577} 2578 2579/* 2580 * Walk subtables of a table and call a callback routine for each 2581 * subtable. The caller should provide the first subtable and a 2582 * pointer to the end of the table. This can be used to walk tables 2583 * such as MADT and SRAT that use subtable entries. 2584 */ 2585void 2586acpi_walk_subtables(void *first, void *end, acpi_subtable_handler *handler, 2587 void *arg) 2588{ 2589 ACPI_SUBTABLE_HEADER *entry; 2590 2591 for (entry = first; (void *)entry < end; ) { 2592 /* Avoid an infinite loop if we hit a bogus entry. */ 2593 if (entry->Length < sizeof(ACPI_SUBTABLE_HEADER)) 2594 return; 2595 2596 handler(entry, arg); 2597 entry = ACPI_ADD_PTR(ACPI_SUBTABLE_HEADER, entry, entry->Length); 2598 } 2599} 2600 2601/* 2602 * DEPRECATED. This interface has serious deficiencies and will be 2603 * removed. 2604 * 2605 * Immediately enter the sleep state. In the old model, acpiconf(8) ran 2606 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this. 2607 */ 2608ACPI_STATUS 2609acpi_SetSleepState(struct acpi_softc *sc, int state) 2610{ 2611 static int once; 2612 2613 if (!once) { 2614 device_printf(sc->acpi_dev, 2615"warning: acpi_SetSleepState() deprecated, need to update your software\n"); 2616 once = 1; 2617 } 2618 return (acpi_EnterSleepState(sc, state)); 2619} 2620 2621#if defined(__amd64__) || defined(__i386__) 2622static void 2623acpi_sleep_force_task(void *context) 2624{ 2625 struct acpi_softc *sc = (struct acpi_softc *)context; 2626 2627 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2628 device_printf(sc->acpi_dev, "force sleep state S%d failed\n", 2629 sc->acpi_next_sstate); 2630} 2631 2632static void 2633acpi_sleep_force(void *arg) 2634{ 2635 struct acpi_softc *sc = (struct acpi_softc *)arg; 2636 2637 device_printf(sc->acpi_dev, 2638 "suspend request timed out, forcing sleep now\n"); 2639 /* 2640 * XXX Suspending from callout causes freezes in DEVICE_SUSPEND(). 2641 * Suspend from acpi_task thread instead. 2642 */ 2643 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 2644 acpi_sleep_force_task, sc))) 2645 device_printf(sc->acpi_dev, "AcpiOsExecute() for sleeping failed\n"); 2646} 2647#endif 2648 2649/* 2650 * Request that the system enter the given suspend state. All /dev/apm 2651 * devices and devd(8) will be notified. Userland then has a chance to 2652 * save state and acknowledge the request. The system sleeps once all 2653 * acks are in. 2654 */ 2655int 2656acpi_ReqSleepState(struct acpi_softc *sc, int state) 2657{ 2658#if defined(__amd64__) || defined(__i386__) 2659 struct apm_clone_data *clone; 2660 ACPI_STATUS status; 2661 2662 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX) 2663 return (EINVAL); 2664 if (!acpi_sleep_states[state]) 2665 return (EOPNOTSUPP); 2666 2667 /* 2668 * If a reboot/shutdown/suspend request is already in progress or 2669 * suspend is blocked due to an upcoming shutdown, just return. 2670 */ 2671 if (rebooting || sc->acpi_next_sstate != 0 || suspend_blocked) { 2672 return (0); 2673 } 2674 2675 /* Wait until sleep is enabled. */ 2676 while (sc->acpi_sleep_disabled) { 2677 AcpiOsSleep(1000); 2678 } 2679 2680 ACPI_LOCK(acpi); 2681 2682 sc->acpi_next_sstate = state; 2683 2684 /* S5 (soft-off) should be entered directly with no waiting. */ 2685 if (state == ACPI_STATE_S5) { 2686 ACPI_UNLOCK(acpi); 2687 status = acpi_EnterSleepState(sc, state); 2688 return (ACPI_SUCCESS(status) ? 0 : ENXIO); 2689 } 2690 2691 /* Record the pending state and notify all apm devices. */ 2692 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2693 clone->notify_status = APM_EV_NONE; 2694 if ((clone->flags & ACPI_EVF_DEVD) == 0) { 2695 selwakeuppri(&clone->sel_read, PZERO); 2696 KNOTE_LOCKED(&clone->sel_read.si_note, 0); 2697 } 2698 } 2699 2700 /* If devd(8) is not running, immediately enter the sleep state. */ 2701 if (!devctl_process_running()) { 2702 ACPI_UNLOCK(acpi); 2703 status = acpi_EnterSleepState(sc, state); 2704 return (ACPI_SUCCESS(status) ? 0 : ENXIO); 2705 } 2706 2707 /* 2708 * Set a timeout to fire if userland doesn't ack the suspend request 2709 * in time. This way we still eventually go to sleep if we were 2710 * overheating or running low on battery, even if userland is hung. 2711 * We cancel this timeout once all userland acks are in or the 2712 * suspend request is aborted. 2713 */ 2714 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc); 2715 ACPI_UNLOCK(acpi); 2716 2717 /* Now notify devd(8) also. */ 2718 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state); 2719 2720 return (0); 2721#else 2722 /* This platform does not support acpi suspend/resume. */ 2723 return (EOPNOTSUPP); 2724#endif 2725} 2726 2727/* 2728 * Acknowledge (or reject) a pending sleep state. The caller has 2729 * prepared for suspend and is now ready for it to proceed. If the 2730 * error argument is non-zero, it indicates suspend should be cancelled 2731 * and gives an errno value describing why. Once all votes are in, 2732 * we suspend the system. 2733 */ 2734int 2735acpi_AckSleepState(struct apm_clone_data *clone, int error) 2736{ 2737#if defined(__amd64__) || defined(__i386__) 2738 struct acpi_softc *sc; 2739 int ret, sleeping; 2740 2741 /* If no pending sleep state, return an error. */ 2742 ACPI_LOCK(acpi); 2743 sc = clone->acpi_sc; 2744 if (sc->acpi_next_sstate == 0) { 2745 ACPI_UNLOCK(acpi); 2746 return (ENXIO); 2747 } 2748 2749 /* Caller wants to abort suspend process. */ 2750 if (error) { 2751 sc->acpi_next_sstate = 0; 2752 callout_stop(&sc->susp_force_to); 2753 device_printf(sc->acpi_dev, 2754 "listener on %s cancelled the pending suspend\n", 2755 devtoname(clone->cdev)); 2756 ACPI_UNLOCK(acpi); 2757 return (0); 2758 } 2759 2760 /* 2761 * Mark this device as acking the suspend request. Then, walk through 2762 * all devices, seeing if they agree yet. We only count devices that 2763 * are writable since read-only devices couldn't ack the request. 2764 */ 2765 sleeping = TRUE; 2766 clone->notify_status = APM_EV_ACKED; 2767 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2768 if ((clone->flags & ACPI_EVF_WRITE) != 0 && 2769 clone->notify_status != APM_EV_ACKED) { 2770 sleeping = FALSE; 2771 break; 2772 } 2773 } 2774 2775 /* If all devices have voted "yes", we will suspend now. */ 2776 if (sleeping) 2777 callout_stop(&sc->susp_force_to); 2778 ACPI_UNLOCK(acpi); 2779 ret = 0; 2780 if (sleeping) { 2781 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2782 ret = ENODEV; 2783 } 2784 return (ret); 2785#else 2786 /* This platform does not support acpi suspend/resume. */ 2787 return (EOPNOTSUPP); 2788#endif 2789} 2790 2791static void 2792acpi_sleep_enable(void *arg) 2793{ 2794 struct acpi_softc *sc = (struct acpi_softc *)arg; 2795 2796 ACPI_LOCK_ASSERT(acpi); 2797 2798 /* Reschedule if the system is not fully up and running. */ 2799 if (!AcpiGbl_SystemAwakeAndRunning) { 2800 callout_schedule(&acpi_sleep_timer, hz * ACPI_MINIMUM_AWAKETIME); 2801 return; 2802 } 2803 2804 sc->acpi_sleep_disabled = FALSE; 2805} 2806 2807static ACPI_STATUS 2808acpi_sleep_disable(struct acpi_softc *sc) 2809{ 2810 ACPI_STATUS status; 2811 2812 /* Fail if the system is not fully up and running. */ 2813 if (!AcpiGbl_SystemAwakeAndRunning) 2814 return (AE_ERROR); 2815 2816 ACPI_LOCK(acpi); 2817 status = sc->acpi_sleep_disabled ? AE_ERROR : AE_OK; 2818 sc->acpi_sleep_disabled = TRUE; 2819 ACPI_UNLOCK(acpi); 2820 2821 return (status); 2822} 2823 2824enum acpi_sleep_state { 2825 ACPI_SS_NONE, 2826 ACPI_SS_GPE_SET, 2827 ACPI_SS_DEV_SUSPEND, 2828 ACPI_SS_SLP_PREP, 2829 ACPI_SS_SLEPT, 2830}; 2831 2832/* 2833 * Enter the desired system sleep state. 2834 * 2835 * Currently we support S1-S5 but S4 is only S4BIOS 2836 */ 2837static ACPI_STATUS 2838acpi_EnterSleepState(struct acpi_softc *sc, int state) 2839{ 2840 register_t intr; 2841 ACPI_STATUS status; 2842 ACPI_EVENT_STATUS power_button_status; 2843 enum acpi_sleep_state slp_state; 2844 int sleep_result; 2845 2846 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2847 2848 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX) 2849 return_ACPI_STATUS (AE_BAD_PARAMETER); 2850 if (!acpi_sleep_states[state]) { 2851 device_printf(sc->acpi_dev, "Sleep state S%d not supported by BIOS\n", 2852 state); 2853 return (AE_SUPPORT); 2854 } 2855 2856 /* Re-entry once we're suspending is not allowed. */ 2857 status = acpi_sleep_disable(sc); 2858 if (ACPI_FAILURE(status)) { 2859 device_printf(sc->acpi_dev, 2860 "suspend request ignored (not ready yet)\n"); 2861 return (status); 2862 } 2863 2864 if (state == ACPI_STATE_S5) { 2865 /* 2866 * Shut down cleanly and power off. This will call us back through the 2867 * shutdown handlers. 2868 */ 2869 shutdown_nice(RB_POWEROFF); 2870 return_ACPI_STATUS (AE_OK); 2871 } 2872 2873 EVENTHANDLER_INVOKE(power_suspend_early); 2874 stop_all_proc(); 2875 EVENTHANDLER_INVOKE(power_suspend); 2876 2877#ifdef EARLY_AP_STARTUP 2878 MPASS(mp_ncpus == 1 || smp_started); 2879 thread_lock(curthread); 2880 sched_bind(curthread, 0); 2881 thread_unlock(curthread); 2882#else 2883 if (smp_started) { 2884 thread_lock(curthread); 2885 sched_bind(curthread, 0); 2886 thread_unlock(curthread); 2887 } 2888#endif 2889 2890 /* 2891 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE 2892 * drivers need this. 2893 */ 2894 mtx_lock(&Giant); 2895 2896 slp_state = ACPI_SS_NONE; 2897 2898 sc->acpi_sstate = state; 2899 2900 /* Enable any GPEs as appropriate and requested by the user. */ 2901 acpi_wake_prep_walk(state); 2902 slp_state = ACPI_SS_GPE_SET; 2903 2904 /* 2905 * Inform all devices that we are going to sleep. If at least one 2906 * device fails, DEVICE_SUSPEND() automatically resumes the tree. 2907 * 2908 * XXX Note that a better two-pass approach with a 'veto' pass 2909 * followed by a "real thing" pass would be better, but the current 2910 * bus interface does not provide for this. 2911 */ 2912 if (DEVICE_SUSPEND(root_bus) != 0) { 2913 device_printf(sc->acpi_dev, "device_suspend failed\n"); 2914 goto backout; 2915 } 2916 slp_state = ACPI_SS_DEV_SUSPEND; 2917 2918 status = AcpiEnterSleepStatePrep(state); 2919 if (ACPI_FAILURE(status)) { 2920 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2921 AcpiFormatException(status)); 2922 goto backout; 2923 } 2924 slp_state = ACPI_SS_SLP_PREP; 2925 2926 if (sc->acpi_sleep_delay > 0) 2927 DELAY(sc->acpi_sleep_delay * 1000000); 2928 2929 suspendclock(); 2930 intr = intr_disable(); 2931 if (state != ACPI_STATE_S1) { 2932 sleep_result = acpi_sleep_machdep(sc, state); 2933 acpi_wakeup_machdep(sc, state, sleep_result, 0); 2934 2935 /* 2936 * XXX According to ACPI specification SCI_EN bit should be restored 2937 * by ACPI platform (BIOS, firmware) to its pre-sleep state. 2938 * Unfortunately some BIOSes fail to do that and that leads to 2939 * unexpected and serious consequences during wake up like a system 2940 * getting stuck in SMI handlers. 2941 * This hack is picked up from Linux, which claims that it follows 2942 * Windows behavior. 2943 */ 2944 if (sleep_result == 1 && state != ACPI_STATE_S4) 2945 AcpiWriteBitRegister(ACPI_BITREG_SCI_ENABLE, ACPI_ENABLE_EVENT); 2946 2947 if (sleep_result == 1 && state == ACPI_STATE_S3) { 2948 /* 2949 * Prevent mis-interpretation of the wakeup by power button 2950 * as a request for power off. 2951 * Ideally we should post an appropriate wakeup event, 2952 * perhaps using acpi_event_power_button_wake or alike. 2953 * 2954 * Clearing of power button status after wakeup is mandated 2955 * by ACPI specification in section "Fixed Power Button". 2956 * 2957 * XXX As of ACPICA 20121114 AcpiGetEventStatus provides 2958 * status as 0/1 corressponding to inactive/active despite 2959 * its type being ACPI_EVENT_STATUS. In other words, 2960 * we should not test for ACPI_EVENT_FLAG_SET for time being. 2961 */ 2962 if (ACPI_SUCCESS(AcpiGetEventStatus(ACPI_EVENT_POWER_BUTTON, 2963 &power_button_status)) && power_button_status != 0) { 2964 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 2965 device_printf(sc->acpi_dev, 2966 "cleared fixed power button status\n"); 2967 } 2968 } 2969 2970 intr_restore(intr); 2971 2972 /* call acpi_wakeup_machdep() again with interrupt enabled */ 2973 acpi_wakeup_machdep(sc, state, sleep_result, 1); 2974 2975 AcpiLeaveSleepStatePrep(state); 2976 2977 if (sleep_result == -1) 2978 goto backout; 2979 2980 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 2981 if (state == ACPI_STATE_S4) 2982 AcpiEnable(); 2983 } else { 2984 status = AcpiEnterSleepState(state); 2985 intr_restore(intr); 2986 AcpiLeaveSleepStatePrep(state); 2987 if (ACPI_FAILURE(status)) { 2988 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 2989 AcpiFormatException(status)); 2990 goto backout; 2991 } 2992 } 2993 slp_state = ACPI_SS_SLEPT; 2994 2995 /* 2996 * Back out state according to how far along we got in the suspend 2997 * process. This handles both the error and success cases. 2998 */ 2999backout: 3000 if (slp_state >= ACPI_SS_SLP_PREP) 3001 resumeclock(); 3002 if (slp_state >= ACPI_SS_GPE_SET) { 3003 acpi_wake_prep_walk(state); 3004 sc->acpi_sstate = ACPI_STATE_S0; 3005 } 3006 if (slp_state >= ACPI_SS_DEV_SUSPEND) 3007 DEVICE_RESUME(root_bus); 3008 if (slp_state >= ACPI_SS_SLP_PREP) 3009 AcpiLeaveSleepState(state); 3010 if (slp_state >= ACPI_SS_SLEPT) { 3011#if defined(__i386__) || defined(__amd64__) 3012 /* NB: we are still using ACPI timecounter at this point. */ 3013 resume_TSC(); 3014#endif 3015 acpi_resync_clock(sc); 3016 acpi_enable_fixed_events(sc); 3017 } 3018 sc->acpi_next_sstate = 0; 3019 3020 mtx_unlock(&Giant); 3021 3022#ifdef EARLY_AP_STARTUP 3023 thread_lock(curthread); 3024 sched_unbind(curthread); 3025 thread_unlock(curthread); 3026#else 3027 if (smp_started) { 3028 thread_lock(curthread); 3029 sched_unbind(curthread); 3030 thread_unlock(curthread); 3031 } 3032#endif 3033 3034 resume_all_proc(); 3035 3036 EVENTHANDLER_INVOKE(power_resume); 3037 3038 /* Allow another sleep request after a while. */ 3039 callout_schedule(&acpi_sleep_timer, hz * ACPI_MINIMUM_AWAKETIME); 3040 3041 /* Run /etc/rc.resume after we are back. */ 3042 if (devctl_process_running()) 3043 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state); 3044 3045 return_ACPI_STATUS (status); 3046} 3047 3048static void 3049acpi_resync_clock(struct acpi_softc *sc) 3050{ 3051#ifdef __amd64__ 3052 if (!acpi_reset_clock) 3053 return; 3054 3055 /* 3056 * Warm up timecounter again and reset system clock. 3057 */ 3058 (void)timecounter->tc_get_timecount(timecounter); 3059 (void)timecounter->tc_get_timecount(timecounter); 3060 inittodr(time_second + sc->acpi_sleep_delay); 3061#endif 3062} 3063 3064/* Enable or disable the device's wake GPE. */ 3065int 3066acpi_wake_set_enable(device_t dev, int enable) 3067{ 3068 struct acpi_prw_data prw; 3069 ACPI_STATUS status; 3070 int flags; 3071 3072 /* Make sure the device supports waking the system and get the GPE. */ 3073 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 3074 return (ENXIO); 3075 3076 flags = acpi_get_flags(dev); 3077 if (enable) { 3078 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 3079 ACPI_GPE_ENABLE); 3080 if (ACPI_FAILURE(status)) { 3081 device_printf(dev, "enable wake failed\n"); 3082 return (ENXIO); 3083 } 3084 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); 3085 } else { 3086 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 3087 ACPI_GPE_DISABLE); 3088 if (ACPI_FAILURE(status)) { 3089 device_printf(dev, "disable wake failed\n"); 3090 return (ENXIO); 3091 } 3092 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); 3093 } 3094 3095 return (0); 3096} 3097 3098static int 3099acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate) 3100{ 3101 struct acpi_prw_data prw; 3102 device_t dev; 3103 3104 /* Check that this is a wake-capable device and get its GPE. */ 3105 if (acpi_parse_prw(handle, &prw) != 0) 3106 return (ENXIO); 3107 dev = acpi_get_device(handle); 3108 3109 /* 3110 * The destination sleep state must be less than (i.e., higher power) 3111 * or equal to the value specified by _PRW. If this GPE cannot be 3112 * enabled for the next sleep state, then disable it. If it can and 3113 * the user requested it be enabled, turn on any required power resources 3114 * and set _PSW. 3115 */ 3116 if (sstate > prw.lowest_wake) { 3117 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_DISABLE); 3118 if (bootverbose) 3119 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n", 3120 acpi_name(handle), sstate); 3121 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) { 3122 acpi_pwr_wake_enable(handle, 1); 3123 acpi_SetInteger(handle, "_PSW", 1); 3124 if (bootverbose) 3125 device_printf(dev, "wake_prep enabled for %s (S%d)\n", 3126 acpi_name(handle), sstate); 3127 } 3128 3129 return (0); 3130} 3131 3132static int 3133acpi_wake_run_prep(ACPI_HANDLE handle, int sstate) 3134{ 3135 struct acpi_prw_data prw; 3136 device_t dev; 3137 3138 /* 3139 * Check that this is a wake-capable device and get its GPE. Return 3140 * now if the user didn't enable this device for wake. 3141 */ 3142 if (acpi_parse_prw(handle, &prw) != 0) 3143 return (ENXIO); 3144 dev = acpi_get_device(handle); 3145 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0) 3146 return (0); 3147 3148 /* 3149 * If this GPE couldn't be enabled for the previous sleep state, it was 3150 * disabled before going to sleep so re-enable it. If it was enabled, 3151 * clear _PSW and turn off any power resources it used. 3152 */ 3153 if (sstate > prw.lowest_wake) { 3154 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_ENABLE); 3155 if (bootverbose) 3156 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle)); 3157 } else { 3158 acpi_SetInteger(handle, "_PSW", 0); 3159 acpi_pwr_wake_enable(handle, 0); 3160 if (bootverbose) 3161 device_printf(dev, "run_prep cleaned up for %s\n", 3162 acpi_name(handle)); 3163 } 3164 3165 return (0); 3166} 3167 3168static ACPI_STATUS 3169acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 3170{ 3171 int sstate; 3172 3173 /* If suspending, run the sleep prep function, otherwise wake. */ 3174 sstate = *(int *)context; 3175 if (AcpiGbl_SystemAwakeAndRunning) 3176 acpi_wake_sleep_prep(handle, sstate); 3177 else 3178 acpi_wake_run_prep(handle, sstate); 3179 return (AE_OK); 3180} 3181 3182/* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */ 3183static int 3184acpi_wake_prep_walk(int sstate) 3185{ 3186 ACPI_HANDLE sb_handle; 3187 3188 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) 3189 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100, 3190 acpi_wake_prep, NULL, &sstate, NULL); 3191 return (0); 3192} 3193 3194/* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */ 3195static int 3196acpi_wake_sysctl_walk(device_t dev) 3197{ 3198 int error, i, numdevs; 3199 device_t *devlist; 3200 device_t child; 3201 ACPI_STATUS status; 3202 3203 error = device_get_children(dev, &devlist, &numdevs); 3204 if (error != 0 || numdevs == 0) { 3205 if (numdevs == 0) 3206 free(devlist, M_TEMP); 3207 return (error); 3208 } 3209 for (i = 0; i < numdevs; i++) { 3210 child = devlist[i]; 3211 acpi_wake_sysctl_walk(child); 3212 if (!device_is_attached(child)) 3213 continue; 3214 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL); 3215 if (ACPI_SUCCESS(status)) { 3216 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child), 3217 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO, 3218 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0, 3219 acpi_wake_set_sysctl, "I", "Device set to wake the system"); 3220 } 3221 } 3222 free(devlist, M_TEMP); 3223 3224 return (0); 3225} 3226 3227/* Enable or disable wake from userland. */ 3228static int 3229acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS) 3230{ 3231 int enable, error; 3232 device_t dev; 3233 3234 dev = (device_t)arg1; 3235 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0; 3236 3237 error = sysctl_handle_int(oidp, &enable, 0, req); 3238 if (error != 0 || req->newptr == NULL) 3239 return (error); 3240 if (enable != 0 && enable != 1) 3241 return (EINVAL); 3242 3243 return (acpi_wake_set_enable(dev, enable)); 3244} 3245 3246/* Parse a device's _PRW into a structure. */ 3247int 3248acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) 3249{ 3250 ACPI_STATUS status; 3251 ACPI_BUFFER prw_buffer; 3252 ACPI_OBJECT *res, *res2; 3253 int error, i, power_count; 3254 3255 if (h == NULL || prw == NULL) 3256 return (EINVAL); 3257 3258 /* 3259 * The _PRW object (7.2.9) is only required for devices that have the 3260 * ability to wake the system from a sleeping state. 3261 */ 3262 error = EINVAL; 3263 prw_buffer.Pointer = NULL; 3264 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 3265 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 3266 if (ACPI_FAILURE(status)) 3267 return (ENOENT); 3268 res = (ACPI_OBJECT *)prw_buffer.Pointer; 3269 if (res == NULL) 3270 return (ENOENT); 3271 if (!ACPI_PKG_VALID(res, 2)) 3272 goto out; 3273 3274 /* 3275 * Element 1 of the _PRW object: 3276 * The lowest power system sleeping state that can be entered while still 3277 * providing wake functionality. The sleeping state being entered must 3278 * be less than (i.e., higher power) or equal to this value. 3279 */ 3280 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) 3281 goto out; 3282 3283 /* 3284 * Element 0 of the _PRW object: 3285 */ 3286 switch (res->Package.Elements[0].Type) { 3287 case ACPI_TYPE_INTEGER: 3288 /* 3289 * If the data type of this package element is numeric, then this 3290 * _PRW package element is the bit index in the GPEx_EN, in the 3291 * GPE blocks described in the FADT, of the enable bit that is 3292 * enabled for the wake event. 3293 */ 3294 prw->gpe_handle = NULL; 3295 prw->gpe_bit = res->Package.Elements[0].Integer.Value; 3296 error = 0; 3297 break; 3298 case ACPI_TYPE_PACKAGE: 3299 /* 3300 * If the data type of this package element is a package, then this 3301 * _PRW package element is itself a package containing two 3302 * elements. The first is an object reference to the GPE Block 3303 * device that contains the GPE that will be triggered by the wake 3304 * event. The second element is numeric and it contains the bit 3305 * index in the GPEx_EN, in the GPE Block referenced by the 3306 * first element in the package, of the enable bit that is enabled for 3307 * the wake event. 3308 * 3309 * For example, if this field is a package then it is of the form: 3310 * Package() {\_SB.PCI0.ISA.GPE, 2} 3311 */ 3312 res2 = &res->Package.Elements[0]; 3313 if (!ACPI_PKG_VALID(res2, 2)) 3314 goto out; 3315 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 3316 if (prw->gpe_handle == NULL) 3317 goto out; 3318 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) 3319 goto out; 3320 error = 0; 3321 break; 3322 default: 3323 goto out; 3324 } 3325 3326 /* Elements 2 to N of the _PRW object are power resources. */ 3327 power_count = res->Package.Count - 2; 3328 if (power_count > ACPI_PRW_MAX_POWERRES) { 3329 printf("ACPI device %s has too many power resources\n", acpi_name(h)); 3330 power_count = 0; 3331 } 3332 prw->power_res_count = power_count; 3333 for (i = 0; i < power_count; i++) 3334 prw->power_res[i] = res->Package.Elements[i]; 3335 3336out: 3337 if (prw_buffer.Pointer != NULL) 3338 AcpiOsFree(prw_buffer.Pointer); 3339 return (error); 3340} 3341 3342/* 3343 * ACPI Event Handlers 3344 */ 3345 3346/* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 3347 3348static void 3349acpi_system_eventhandler_sleep(void *arg, int state) 3350{ 3351 struct acpi_softc *sc = (struct acpi_softc *)arg; 3352 int ret; 3353 3354 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 3355 3356 /* Check if button action is disabled or unknown. */ 3357 if (state == ACPI_STATE_UNKNOWN) 3358 return; 3359 3360 /* Request that the system prepare to enter the given suspend state. */ 3361 ret = acpi_ReqSleepState(sc, state); 3362 if (ret != 0) 3363 device_printf(sc->acpi_dev, 3364 "request to enter state S%d failed (err %d)\n", state, ret); 3365 3366 return_VOID; 3367} 3368 3369static void 3370acpi_system_eventhandler_wakeup(void *arg, int state) 3371{ 3372 3373 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 3374 3375 /* Currently, nothing to do for wakeup. */ 3376 3377 return_VOID; 3378} 3379 3380/* 3381 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 3382 */ 3383static void 3384acpi_invoke_sleep_eventhandler(void *context) 3385{ 3386 3387 EVENTHANDLER_INVOKE(acpi_sleep_event, *(int *)context); 3388} 3389 3390static void 3391acpi_invoke_wake_eventhandler(void *context) 3392{ 3393 3394 EVENTHANDLER_INVOKE(acpi_wakeup_event, *(int *)context); 3395} 3396 3397UINT32 3398acpi_event_power_button_sleep(void *context) 3399{ 3400 struct acpi_softc *sc = (struct acpi_softc *)context; 3401 3402 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3403 3404 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3405 acpi_invoke_sleep_eventhandler, &sc->acpi_power_button_sx))) 3406 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3407 return_VALUE (ACPI_INTERRUPT_HANDLED); 3408} 3409 3410UINT32 3411acpi_event_power_button_wake(void *context) 3412{ 3413 struct acpi_softc *sc = (struct acpi_softc *)context; 3414 3415 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3416 3417 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3418 acpi_invoke_wake_eventhandler, &sc->acpi_power_button_sx))) 3419 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3420 return_VALUE (ACPI_INTERRUPT_HANDLED); 3421} 3422 3423UINT32 3424acpi_event_sleep_button_sleep(void *context) 3425{ 3426 struct acpi_softc *sc = (struct acpi_softc *)context; 3427 3428 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3429 3430 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3431 acpi_invoke_sleep_eventhandler, &sc->acpi_sleep_button_sx))) 3432 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3433 return_VALUE (ACPI_INTERRUPT_HANDLED); 3434} 3435 3436UINT32 3437acpi_event_sleep_button_wake(void *context) 3438{ 3439 struct acpi_softc *sc = (struct acpi_softc *)context; 3440 3441 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3442 3443 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, 3444 acpi_invoke_wake_eventhandler, &sc->acpi_sleep_button_sx))) 3445 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); 3446 return_VALUE (ACPI_INTERRUPT_HANDLED); 3447} 3448 3449/* 3450 * XXX This static buffer is suboptimal. There is no locking so only 3451 * use this for single-threaded callers. 3452 */ 3453char * 3454acpi_name(ACPI_HANDLE handle) 3455{ 3456 ACPI_BUFFER buf; 3457 static char data[256]; 3458 3459 buf.Length = sizeof(data); 3460 buf.Pointer = data; 3461 3462 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf))) 3463 return (data); 3464 return ("(unknown)"); 3465} 3466 3467/* 3468 * Debugging/bug-avoidance. Avoid trying to fetch info on various 3469 * parts of the namespace. 3470 */ 3471int 3472acpi_avoid(ACPI_HANDLE handle) 3473{ 3474 char *cp, *env, *np; 3475 int len; 3476 3477 np = acpi_name(handle); 3478 if (*np == '\\') 3479 np++; 3480 if ((env = kern_getenv("debug.acpi.avoid")) == NULL) 3481 return (0); 3482 3483 /* Scan the avoid list checking for a match */ 3484 cp = env; 3485 for (;;) { 3486 while (*cp != 0 && isspace(*cp)) 3487 cp++; 3488 if (*cp == 0) 3489 break; 3490 len = 0; 3491 while (cp[len] != 0 && !isspace(cp[len])) 3492 len++; 3493 if (!strncmp(cp, np, len)) { 3494 freeenv(env); 3495 return(1); 3496 } 3497 cp += len; 3498 } 3499 freeenv(env); 3500 3501 return (0); 3502} 3503 3504/* 3505 * Debugging/bug-avoidance. Disable ACPI subsystem components. 3506 */ 3507int 3508acpi_disabled(char *subsys) 3509{ 3510 char *cp, *env; 3511 int len; 3512 3513 if ((env = kern_getenv("debug.acpi.disabled")) == NULL) 3514 return (0); 3515 if (strcmp(env, "all") == 0) { 3516 freeenv(env); 3517 return (1); 3518 } 3519 3520 /* Scan the disable list, checking for a match. */ 3521 cp = env; 3522 for (;;) { 3523 while (*cp != '\0' && isspace(*cp)) 3524 cp++; 3525 if (*cp == '\0') 3526 break; 3527 len = 0; 3528 while (cp[len] != '\0' && !isspace(cp[len])) 3529 len++; 3530 if (strncmp(cp, subsys, len) == 0) { 3531 freeenv(env); 3532 return (1); 3533 } 3534 cp += len; 3535 } 3536 freeenv(env); 3537 3538 return (0); 3539} 3540 3541static void 3542acpi_lookup(void *arg, const char *name, device_t *dev) 3543{ 3544 ACPI_HANDLE handle; 3545 3546 if (*dev != NULL) 3547 return; 3548 3549 /* 3550 * Allow any handle name that is specified as an absolute path and 3551 * starts with '\'. We could restrict this to \_SB and friends, 3552 * but see acpi_probe_children() for notes on why we scan the entire 3553 * namespace for devices. 3554 * 3555 * XXX: The pathname argument to AcpiGetHandle() should be fixed to 3556 * be const. 3557 */ 3558 if (name[0] != '\\') 3559 return; 3560 if (ACPI_FAILURE(AcpiGetHandle(ACPI_ROOT_OBJECT, __DECONST(char *, name), 3561 &handle))) 3562 return; 3563 *dev = acpi_get_device(handle); 3564} 3565 3566/* 3567 * Control interface. 3568 * 3569 * We multiplex ioctls for all participating ACPI devices here. Individual 3570 * drivers wanting to be accessible via /dev/acpi should use the 3571 * register/deregister interface to make their handlers visible. 3572 */ 3573struct acpi_ioctl_hook 3574{ 3575 TAILQ_ENTRY(acpi_ioctl_hook) link; 3576 u_long cmd; 3577 acpi_ioctl_fn fn; 3578 void *arg; 3579}; 3580 3581static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 3582static int acpi_ioctl_hooks_initted; 3583 3584int 3585acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 3586{ 3587 struct acpi_ioctl_hook *hp; 3588 3589 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 3590 return (ENOMEM); 3591 hp->cmd = cmd; 3592 hp->fn = fn; 3593 hp->arg = arg; 3594 3595 ACPI_LOCK(acpi); 3596 if (acpi_ioctl_hooks_initted == 0) { 3597 TAILQ_INIT(&acpi_ioctl_hooks); 3598 acpi_ioctl_hooks_initted = 1; 3599 } 3600 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 3601 ACPI_UNLOCK(acpi); 3602 3603 return (0); 3604} 3605 3606void 3607acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 3608{ 3609 struct acpi_ioctl_hook *hp; 3610 3611 ACPI_LOCK(acpi); 3612 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 3613 if (hp->cmd == cmd && hp->fn == fn) 3614 break; 3615 3616 if (hp != NULL) { 3617 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 3618 free(hp, M_ACPIDEV); 3619 } 3620 ACPI_UNLOCK(acpi); 3621} 3622 3623static int 3624acpiopen(struct cdev *dev, int flag, int fmt, struct thread *td) 3625{ 3626 return (0); 3627} 3628 3629static int 3630acpiclose(struct cdev *dev, int flag, int fmt, struct thread *td) 3631{ 3632 return (0); 3633} 3634 3635static int 3636acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 3637{ 3638 struct acpi_softc *sc; 3639 struct acpi_ioctl_hook *hp; 3640 int error, state; 3641 3642 error = 0; 3643 hp = NULL; 3644 sc = dev->si_drv1; 3645 3646 /* 3647 * Scan the list of registered ioctls, looking for handlers. 3648 */ 3649 ACPI_LOCK(acpi); 3650 if (acpi_ioctl_hooks_initted) 3651 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 3652 if (hp->cmd == cmd) 3653 break; 3654 } 3655 ACPI_UNLOCK(acpi); 3656 if (hp) 3657 return (hp->fn(cmd, addr, hp->arg)); 3658 3659 /* 3660 * Core ioctls are not permitted for non-writable user. 3661 * Currently, other ioctls just fetch information. 3662 * Not changing system behavior. 3663 */ 3664 if ((flag & FWRITE) == 0) 3665 return (EPERM); 3666 3667 /* Core system ioctls. */ 3668 switch (cmd) { 3669 case ACPIIO_REQSLPSTATE: 3670 state = *(int *)addr; 3671 if (state != ACPI_STATE_S5) 3672 return (acpi_ReqSleepState(sc, state)); 3673 device_printf(sc->acpi_dev, "power off via acpi ioctl not supported\n"); 3674 error = EOPNOTSUPP; 3675 break; 3676 case ACPIIO_ACKSLPSTATE: 3677 error = *(int *)addr; 3678 error = acpi_AckSleepState(sc->acpi_clone, error); 3679 break; 3680 case ACPIIO_SETSLPSTATE: /* DEPRECATED */ 3681 state = *(int *)addr; 3682 if (state < ACPI_STATE_S0 || state > ACPI_S_STATES_MAX) 3683 return (EINVAL); 3684 if (!acpi_sleep_states[state]) 3685 return (EOPNOTSUPP); 3686 if (ACPI_FAILURE(acpi_SetSleepState(sc, state))) 3687 error = ENXIO; 3688 break; 3689 default: 3690 error = ENXIO; 3691 break; 3692 } 3693 3694 return (error); 3695} 3696 3697static int 3698acpi_sname2sstate(const char *sname) 3699{ 3700 int sstate; 3701 3702 if (toupper(sname[0]) == 'S') { 3703 sstate = sname[1] - '0'; 3704 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5 && 3705 sname[2] == '\0') 3706 return (sstate); 3707 } else if (strcasecmp(sname, "NONE") == 0) 3708 return (ACPI_STATE_UNKNOWN); 3709 return (-1); 3710} 3711 3712static const char * 3713acpi_sstate2sname(int sstate) 3714{ 3715 static const char *snames[] = { "S0", "S1", "S2", "S3", "S4", "S5" }; 3716 3717 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5) 3718 return (snames[sstate]); 3719 else if (sstate == ACPI_STATE_UNKNOWN) 3720 return ("NONE"); 3721 return (NULL); 3722} 3723 3724static int 3725acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3726{ 3727 int error; 3728 struct sbuf sb; 3729 UINT8 state; 3730 3731 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND); 3732 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++) 3733 if (acpi_sleep_states[state]) 3734 sbuf_printf(&sb, "%s ", acpi_sstate2sname(state)); 3735 sbuf_trim(&sb); 3736 sbuf_finish(&sb); 3737 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 3738 sbuf_delete(&sb); 3739 return (error); 3740} 3741 3742static int 3743acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3744{ 3745 char sleep_state[10]; 3746 int error, new_state, old_state; 3747 3748 old_state = *(int *)oidp->oid_arg1; 3749 strlcpy(sleep_state, acpi_sstate2sname(old_state), sizeof(sleep_state)); 3750 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 3751 if (error == 0 && req->newptr != NULL) { 3752 new_state = acpi_sname2sstate(sleep_state); 3753 if (new_state < ACPI_STATE_S1) 3754 return (EINVAL); 3755 if (new_state < ACPI_S_STATE_COUNT && !acpi_sleep_states[new_state]) 3756 return (EOPNOTSUPP); 3757 if (new_state != old_state) 3758 *(int *)oidp->oid_arg1 = new_state; 3759 } 3760 return (error); 3761} 3762 3763/* Inform devctl(4) when we receive a Notify. */ 3764void 3765acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 3766{ 3767 char notify_buf[16]; 3768 ACPI_BUFFER handle_buf; 3769 ACPI_STATUS status; 3770 3771 if (subsystem == NULL) 3772 return; 3773 3774 handle_buf.Pointer = NULL; 3775 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 3776 status = AcpiNsHandleToPathname(h, &handle_buf, FALSE); 3777 if (ACPI_FAILURE(status)) 3778 return; 3779 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 3780 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 3781 AcpiOsFree(handle_buf.Pointer); 3782} 3783 3784#ifdef ACPI_DEBUG 3785/* 3786 * Support for parsing debug options from the kernel environment. 3787 * 3788 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 3789 * by specifying the names of the bits in the debug.acpi.layer and 3790 * debug.acpi.level environment variables. Bits may be unset by 3791 * prefixing the bit name with !. 3792 */ 3793struct debugtag 3794{ 3795 char *name; 3796 UINT32 value; 3797}; 3798 3799static struct debugtag dbg_layer[] = { 3800 {"ACPI_UTILITIES", ACPI_UTILITIES}, 3801 {"ACPI_HARDWARE", ACPI_HARDWARE}, 3802 {"ACPI_EVENTS", ACPI_EVENTS}, 3803 {"ACPI_TABLES", ACPI_TABLES}, 3804 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 3805 {"ACPI_PARSER", ACPI_PARSER}, 3806 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 3807 {"ACPI_EXECUTER", ACPI_EXECUTER}, 3808 {"ACPI_RESOURCES", ACPI_RESOURCES}, 3809 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 3810 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 3811 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 3812 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 3813 3814 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 3815 {"ACPI_BATTERY", ACPI_BATTERY}, 3816 {"ACPI_BUS", ACPI_BUS}, 3817 {"ACPI_BUTTON", ACPI_BUTTON}, 3818 {"ACPI_EC", ACPI_EC}, 3819 {"ACPI_FAN", ACPI_FAN}, 3820 {"ACPI_POWERRES", ACPI_POWERRES}, 3821 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 3822 {"ACPI_THERMAL", ACPI_THERMAL}, 3823 {"ACPI_TIMER", ACPI_TIMER}, 3824 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 3825 {NULL, 0} 3826}; 3827 3828static struct debugtag dbg_level[] = { 3829 {"ACPI_LV_INIT", ACPI_LV_INIT}, 3830 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 3831 {"ACPI_LV_INFO", ACPI_LV_INFO}, 3832 {"ACPI_LV_REPAIR", ACPI_LV_REPAIR}, 3833 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 3834 3835 /* Trace verbosity level 1 [Standard Trace Level] */ 3836 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 3837 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 3838 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 3839 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 3840 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 3841 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 3842 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 3843 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 3844 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 3845 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 3846 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 3847 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 3848 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 3849 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 3850 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 3851 3852 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 3853 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 3854 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 3855 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 3856 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 3857 {"ACPI_LV_ALL", ACPI_LV_ALL}, 3858 3859 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 3860 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 3861 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 3862 {"ACPI_LV_IO", ACPI_LV_IO}, 3863 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 3864 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 3865 3866 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 3867 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 3868 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 3869 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 3870 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 3871 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 3872 {NULL, 0} 3873}; 3874 3875static void 3876acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 3877{ 3878 char *ep; 3879 int i, l; 3880 int set; 3881 3882 while (*cp) { 3883 if (isspace(*cp)) { 3884 cp++; 3885 continue; 3886 } 3887 ep = cp; 3888 while (*ep && !isspace(*ep)) 3889 ep++; 3890 if (*cp == '!') { 3891 set = 0; 3892 cp++; 3893 if (cp == ep) 3894 continue; 3895 } else { 3896 set = 1; 3897 } 3898 l = ep - cp; 3899 for (i = 0; tag[i].name != NULL; i++) { 3900 if (!strncmp(cp, tag[i].name, l)) { 3901 if (set) 3902 *flag |= tag[i].value; 3903 else 3904 *flag &= ~tag[i].value; 3905 } 3906 } 3907 cp = ep; 3908 } 3909} 3910 3911static void 3912acpi_set_debugging(void *junk) 3913{ 3914 char *layer, *level; 3915 3916 if (cold) { 3917 AcpiDbgLayer = 0; 3918 AcpiDbgLevel = 0; 3919 } 3920 3921 layer = kern_getenv("debug.acpi.layer"); 3922 level = kern_getenv("debug.acpi.level"); 3923 if (layer == NULL && level == NULL) 3924 return; 3925 3926 printf("ACPI set debug"); 3927 if (layer != NULL) { 3928 if (strcmp("NONE", layer) != 0) 3929 printf(" layer '%s'", layer); 3930 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer); 3931 freeenv(layer); 3932 } 3933 if (level != NULL) { 3934 if (strcmp("NONE", level) != 0) 3935 printf(" level '%s'", level); 3936 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel); 3937 freeenv(level); 3938 } 3939 printf("\n"); 3940} 3941 3942SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 3943 NULL); 3944 3945static int 3946acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 3947{ 3948 int error, *dbg; 3949 struct debugtag *tag; 3950 struct sbuf sb; 3951 char temp[128]; 3952 3953 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 3954 return (ENOMEM); 3955 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 3956 tag = &dbg_layer[0]; 3957 dbg = &AcpiDbgLayer; 3958 } else { 3959 tag = &dbg_level[0]; 3960 dbg = &AcpiDbgLevel; 3961 } 3962 3963 /* Get old values if this is a get request. */ 3964 ACPI_SERIAL_BEGIN(acpi); 3965 if (*dbg == 0) { 3966 sbuf_cpy(&sb, "NONE"); 3967 } else if (req->newptr == NULL) { 3968 for (; tag->name != NULL; tag++) { 3969 if ((*dbg & tag->value) == tag->value) 3970 sbuf_printf(&sb, "%s ", tag->name); 3971 } 3972 } 3973 sbuf_trim(&sb); 3974 sbuf_finish(&sb); 3975 strlcpy(temp, sbuf_data(&sb), sizeof(temp)); 3976 sbuf_delete(&sb); 3977 3978 error = sysctl_handle_string(oidp, temp, sizeof(temp), req); 3979 3980 /* Check for error or no change */ 3981 if (error == 0 && req->newptr != NULL) { 3982 *dbg = 0; 3983 kern_setenv((char *)oidp->oid_arg1, temp); 3984 acpi_set_debugging(NULL); 3985 } 3986 ACPI_SERIAL_END(acpi); 3987 3988 return (error); 3989} 3990 3991SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 3992 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 3993SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 3994 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 3995#endif /* ACPI_DEBUG */ 3996 3997static int 3998acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS) 3999{ 4000 int error; 4001 int old; 4002 4003 old = acpi_debug_objects; 4004 error = sysctl_handle_int(oidp, &acpi_debug_objects, 0, req); 4005 if (error != 0 || req->newptr == NULL) 4006 return (error); 4007 if (old == acpi_debug_objects || (old && acpi_debug_objects)) 4008 return (0); 4009 4010 ACPI_SERIAL_BEGIN(acpi); 4011 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE; 4012 ACPI_SERIAL_END(acpi); 4013 4014 return (0); 4015} 4016 4017static int 4018acpi_parse_interfaces(char *str, struct acpi_interface *iface) 4019{ 4020 char *p; 4021 size_t len; 4022 int i, j; 4023 4024 p = str; 4025 while (isspace(*p) || *p == ',') 4026 p++; 4027 len = strlen(p); 4028 if (len == 0) 4029 return (0); 4030 p = strdup(p, M_TEMP); 4031 for (i = 0; i < len; i++) 4032 if (p[i] == ',') 4033 p[i] = '\0'; 4034 i = j = 0; 4035 while (i < len) 4036 if (isspace(p[i]) || p[i] == '\0') 4037 i++; 4038 else { 4039 i += strlen(p + i) + 1; 4040 j++; 4041 } 4042 if (j == 0) { 4043 free(p, M_TEMP); 4044 return (0); 4045 } 4046 iface->data = malloc(sizeof(*iface->data) * j, M_TEMP, M_WAITOK); 4047 iface->num = j; 4048 i = j = 0; 4049 while (i < len) 4050 if (isspace(p[i]) || p[i] == '\0') 4051 i++; 4052 else { 4053 iface->data[j] = p + i; 4054 i += strlen(p + i) + 1; 4055 j++; 4056 } 4057 4058 return (j); 4059} 4060 4061static void 4062acpi_free_interfaces(struct acpi_interface *iface) 4063{ 4064 4065 free(iface->data[0], M_TEMP); 4066 free(iface->data, M_TEMP); 4067} 4068 4069static void 4070acpi_reset_interfaces(device_t dev) 4071{ 4072 struct acpi_interface list; 4073 ACPI_STATUS status; 4074 int i; 4075 4076 if (acpi_parse_interfaces(acpi_install_interface, &list) > 0) { 4077 for (i = 0; i < list.num; i++) { 4078 status = AcpiInstallInterface(list.data[i]); 4079 if (ACPI_FAILURE(status)) 4080 device_printf(dev, 4081 "failed to install _OSI(\"%s\"): %s\n", 4082 list.data[i], AcpiFormatException(status)); 4083 else if (bootverbose) 4084 device_printf(dev, "installed _OSI(\"%s\")\n", 4085 list.data[i]); 4086 } 4087 acpi_free_interfaces(&list); 4088 } 4089 if (acpi_parse_interfaces(acpi_remove_interface, &list) > 0) { 4090 for (i = 0; i < list.num; i++) { 4091 status = AcpiRemoveInterface(list.data[i]); 4092 if (ACPI_FAILURE(status)) 4093 device_printf(dev, 4094 "failed to remove _OSI(\"%s\"): %s\n", 4095 list.data[i], AcpiFormatException(status)); 4096 else if (bootverbose) 4097 device_printf(dev, "removed _OSI(\"%s\")\n", 4098 list.data[i]); 4099 } 4100 acpi_free_interfaces(&list); 4101 } 4102} 4103 4104static int 4105acpi_pm_func(u_long cmd, void *arg, ...) 4106{ 4107 int state, acpi_state; 4108 int error; 4109 struct acpi_softc *sc; 4110 va_list ap; 4111 4112 error = 0; 4113 switch (cmd) { 4114 case POWER_CMD_SUSPEND: 4115 sc = (struct acpi_softc *)arg; 4116 if (sc == NULL) { 4117 error = EINVAL; 4118 goto out; 4119 } 4120 4121 va_start(ap, arg); 4122 state = va_arg(ap, int); 4123 va_end(ap); 4124 4125 switch (state) { 4126 case POWER_SLEEP_STATE_STANDBY: 4127 acpi_state = sc->acpi_standby_sx; 4128 break; 4129 case POWER_SLEEP_STATE_SUSPEND: 4130 acpi_state = sc->acpi_suspend_sx; 4131 break; 4132 case POWER_SLEEP_STATE_HIBERNATE: 4133 acpi_state = ACPI_STATE_S4; 4134 break; 4135 default: 4136 error = EINVAL; 4137 goto out; 4138 } 4139 4140 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state))) 4141 error = ENXIO; 4142 break; 4143 default: 4144 error = EINVAL; 4145 goto out; 4146 } 4147 4148out: 4149 return (error); 4150} 4151 4152static void 4153acpi_pm_register(void *arg) 4154{ 4155 if (!cold || resource_disabled("acpi", 0)) 4156 return; 4157 4158 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 4159} 4160 4161SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 4162