acpi.c revision 197536
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: head/sys/dev/acpica/acpi.c 197536 2009-09-27 14:00:16Z jkim $"); 32 33#include "opt_acpi.h" 34#include <sys/param.h> 35#include <sys/kernel.h> 36#include <sys/proc.h> 37#include <sys/fcntl.h> 38#include <sys/malloc.h> 39#include <sys/module.h> 40#include <sys/bus.h> 41#include <sys/conf.h> 42#include <sys/ioccom.h> 43#include <sys/reboot.h> 44#include <sys/sysctl.h> 45#include <sys/ctype.h> 46#include <sys/linker.h> 47#include <sys/power.h> 48#include <sys/sbuf.h> 49#ifdef SMP 50#include <sys/sched.h> 51#endif 52#include <sys/smp.h> 53#include <sys/timetc.h> 54 55#if defined(__i386__) || defined(__amd64__) 56#include <machine/pci_cfgreg.h> 57#endif 58#include <machine/resource.h> 59#include <machine/bus.h> 60#include <sys/rman.h> 61#include <isa/isavar.h> 62#include <isa/pnpvar.h> 63 64#include <contrib/dev/acpica/include/acpi.h> 65#include <contrib/dev/acpica/include/accommon.h> 66#include <contrib/dev/acpica/include/acnamesp.h> 67 68#include <dev/acpica/acpivar.h> 69#include <dev/acpica/acpiio.h> 70 71#include "pci_if.h" 72#include <dev/pci/pcivar.h> 73#include <dev/pci/pci_private.h> 74 75#include <vm/vm_param.h> 76 77MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 78 79/* Hooks for the ACPI CA debugging infrastructure */ 80#define _COMPONENT ACPI_BUS 81ACPI_MODULE_NAME("ACPI") 82 83static d_open_t acpiopen; 84static d_close_t acpiclose; 85static d_ioctl_t acpiioctl; 86 87static struct cdevsw acpi_cdevsw = { 88 .d_version = D_VERSION, 89 .d_open = acpiopen, 90 .d_close = acpiclose, 91 .d_ioctl = acpiioctl, 92 .d_name = "acpi", 93}; 94 95/* Global mutex for locking access to the ACPI subsystem. */ 96struct mtx acpi_mutex; 97 98/* Bitmap of device quirks. */ 99int acpi_quirks; 100 101/* Supported sleep states. */ 102static BOOLEAN acpi_sleep_states[ACPI_S_STATE_COUNT]; 103 104static int acpi_modevent(struct module *mod, int event, void *junk); 105static int acpi_probe(device_t dev); 106static int acpi_attach(device_t dev); 107static int acpi_suspend(device_t dev); 108static int acpi_resume(device_t dev); 109static int acpi_shutdown(device_t dev); 110static device_t acpi_add_child(device_t bus, int order, const char *name, 111 int unit); 112static int acpi_print_child(device_t bus, device_t child); 113static void acpi_probe_nomatch(device_t bus, device_t child); 114static void acpi_driver_added(device_t dev, driver_t *driver); 115static int acpi_read_ivar(device_t dev, device_t child, int index, 116 uintptr_t *result); 117static int acpi_write_ivar(device_t dev, device_t child, int index, 118 uintptr_t value); 119static struct resource_list *acpi_get_rlist(device_t dev, device_t child); 120static int acpi_sysres_alloc(device_t dev); 121static struct resource *acpi_alloc_resource(device_t bus, device_t child, 122 int type, int *rid, u_long start, u_long end, 123 u_long count, u_int flags); 124static int acpi_release_resource(device_t bus, device_t child, int type, 125 int rid, struct resource *r); 126static void acpi_delete_resource(device_t bus, device_t child, int type, 127 int rid); 128static uint32_t acpi_isa_get_logicalid(device_t dev); 129static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count); 130static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids); 131static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev, 132 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters, 133 ACPI_BUFFER *ret); 134static int acpi_device_pwr_for_sleep(device_t bus, device_t dev, 135 int *dstate); 136static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, 137 void *context, void **retval); 138static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev, 139 int max_depth, acpi_scan_cb_t user_fn, void *arg); 140static int acpi_set_powerstate_method(device_t bus, device_t child, 141 int state); 142static int acpi_isa_pnp_probe(device_t bus, device_t child, 143 struct isa_pnp_id *ids); 144static void acpi_probe_children(device_t bus); 145static void acpi_probe_order(ACPI_HANDLE handle, int *order); 146static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, 147 void *context, void **status); 148static BOOLEAN acpi_MatchHid(ACPI_HANDLE h, const char *hid); 149static void acpi_sleep_enable(void *arg); 150static ACPI_STATUS acpi_sleep_disable(struct acpi_softc *sc); 151static ACPI_STATUS acpi_EnterSleepState(struct acpi_softc *sc, int state); 152static void acpi_shutdown_final(void *arg, int howto); 153static void acpi_enable_fixed_events(struct acpi_softc *sc); 154static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate); 155static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate); 156static int acpi_wake_prep_walk(int sstate); 157static int acpi_wake_sysctl_walk(device_t dev); 158static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS); 159static void acpi_system_eventhandler_sleep(void *arg, int state); 160static void acpi_system_eventhandler_wakeup(void *arg, int state); 161static int acpi_sname2sstate(const char *sname); 162static const char *acpi_sstate2sname(int sstate); 163static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 164static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 165static int acpi_pm_func(u_long cmd, void *arg, ...); 166static int acpi_child_location_str_method(device_t acdev, device_t child, 167 char *buf, size_t buflen); 168static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child, 169 char *buf, size_t buflen); 170#if defined(__i386__) || defined(__amd64__) 171static void acpi_enable_pcie(void); 172#endif 173static void acpi_hint_device_unit(device_t acdev, device_t child, 174 const char *name, int *unitp); 175 176static device_method_t acpi_methods[] = { 177 /* Device interface */ 178 DEVMETHOD(device_probe, acpi_probe), 179 DEVMETHOD(device_attach, acpi_attach), 180 DEVMETHOD(device_shutdown, acpi_shutdown), 181 DEVMETHOD(device_detach, bus_generic_detach), 182 DEVMETHOD(device_suspend, acpi_suspend), 183 DEVMETHOD(device_resume, acpi_resume), 184 185 /* Bus interface */ 186 DEVMETHOD(bus_add_child, acpi_add_child), 187 DEVMETHOD(bus_print_child, acpi_print_child), 188 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch), 189 DEVMETHOD(bus_driver_added, acpi_driver_added), 190 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 191 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 192 DEVMETHOD(bus_get_resource_list, acpi_get_rlist), 193 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 194 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 195 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 196 DEVMETHOD(bus_release_resource, acpi_release_resource), 197 DEVMETHOD(bus_delete_resource, acpi_delete_resource), 198 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method), 199 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method), 200 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 201 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 202 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 203 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 204 DEVMETHOD(bus_hint_device_unit, acpi_hint_device_unit), 205 206 /* ACPI bus */ 207 DEVMETHOD(acpi_id_probe, acpi_device_id_probe), 208 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj), 209 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep), 210 DEVMETHOD(acpi_scan_children, acpi_device_scan_children), 211 212 /* PCI emulation */ 213 DEVMETHOD(pci_set_powerstate, acpi_set_powerstate_method), 214 215 /* ISA emulation */ 216 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 217 218 {0, 0} 219}; 220 221static driver_t acpi_driver = { 222 "acpi", 223 acpi_methods, 224 sizeof(struct acpi_softc), 225}; 226 227static devclass_t acpi_devclass; 228DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0); 229MODULE_VERSION(acpi, 1); 230 231ACPI_SERIAL_DECL(acpi, "ACPI root bus"); 232 233/* Local pools for managing system resources for ACPI child devices. */ 234static struct rman acpi_rman_io, acpi_rman_mem; 235 236#define ACPI_MINIMUM_AWAKETIME 5 237 238/* Holds the description of the acpi0 device. */ 239static char acpi_desc[ACPI_OEM_ID_SIZE + ACPI_OEM_TABLE_ID_SIZE + 2]; 240 241SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging"); 242static char acpi_ca_version[12]; 243SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, 244 acpi_ca_version, 0, "Version of Intel ACPI-CA"); 245 246/* 247 * Allow override of whether methods execute in parallel or not. 248 * Enable this for serial behavior, which fixes "AE_ALREADY_EXISTS" 249 * errors for AML that really can't handle parallel method execution. 250 * It is off by default since this breaks recursive methods and 251 * some IBMs use such code. 252 */ 253static int acpi_serialize_methods; 254TUNABLE_INT("hw.acpi.serialize_methods", &acpi_serialize_methods); 255 256/* Power devices off and on in suspend and resume. XXX Remove once tested. */ 257static int acpi_do_powerstate = 1; 258TUNABLE_INT("debug.acpi.do_powerstate", &acpi_do_powerstate); 259SYSCTL_INT(_debug_acpi, OID_AUTO, do_powerstate, CTLFLAG_RW, 260 &acpi_do_powerstate, 1, "Turn off devices when suspending."); 261 262/* Reset system clock while resuming. XXX Remove once tested. */ 263static int acpi_reset_clock = 1; 264TUNABLE_INT("debug.acpi.reset_clock", &acpi_reset_clock); 265SYSCTL_INT(_debug_acpi, OID_AUTO, reset_clock, CTLFLAG_RW, 266 &acpi_reset_clock, 1, "Reset system clock while resuming."); 267 268/* Allow users to override quirks. */ 269TUNABLE_INT("debug.acpi.quirks", &acpi_quirks); 270 271static int acpi_susp_bounce; 272SYSCTL_INT(_debug_acpi, OID_AUTO, suspend_bounce, CTLFLAG_RW, 273 &acpi_susp_bounce, 0, "Don't actually suspend, just test devices."); 274 275/* 276 * ACPI can only be loaded as a module by the loader; activating it after 277 * system bootstrap time is not useful, and can be fatal to the system. 278 * It also cannot be unloaded, since the entire system bus hierarchy hangs 279 * off it. 280 */ 281static int 282acpi_modevent(struct module *mod, int event, void *junk) 283{ 284 switch (event) { 285 case MOD_LOAD: 286 if (!cold) { 287 printf("The ACPI driver cannot be loaded after boot.\n"); 288 return (EPERM); 289 } 290 break; 291 case MOD_UNLOAD: 292 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 293 return (EBUSY); 294 break; 295 default: 296 break; 297 } 298 return (0); 299} 300 301/* 302 * Perform early initialization. 303 */ 304ACPI_STATUS 305acpi_Startup(void) 306{ 307 static int started = 0; 308 ACPI_STATUS status; 309 int val; 310 311 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 312 313 /* Only run the startup code once. The MADT driver also calls this. */ 314 if (started) 315 return_VALUE (AE_OK); 316 started = 1; 317 318 /* 319 * Pre-allocate space for RSDT/XSDT and DSDT tables and allow resizing 320 * if more tables exist. 321 */ 322 if (ACPI_FAILURE(status = AcpiInitializeTables(NULL, 2, TRUE))) { 323 printf("ACPI: Table initialisation failed: %s\n", 324 AcpiFormatException(status)); 325 return_VALUE (status); 326 } 327 328 /* Set up any quirks we have for this system. */ 329 if (acpi_quirks == ACPI_Q_OK) 330 acpi_table_quirks(&acpi_quirks); 331 332 /* If the user manually set the disabled hint to 0, force-enable ACPI. */ 333 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0) 334 acpi_quirks &= ~ACPI_Q_BROKEN; 335 if (acpi_quirks & ACPI_Q_BROKEN) { 336 printf("ACPI disabled by blacklist. Contact your BIOS vendor.\n"); 337 status = AE_SUPPORT; 338 } 339 340 return_VALUE (status); 341} 342 343/* 344 * Detect ACPI and perform early initialisation. 345 */ 346int 347acpi_identify(void) 348{ 349 ACPI_TABLE_RSDP *rsdp; 350 ACPI_TABLE_HEADER *rsdt; 351 ACPI_PHYSICAL_ADDRESS paddr; 352 struct sbuf sb; 353 354 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 355 356 if (!cold) 357 return (ENXIO); 358 359 /* Check that we haven't been disabled with a hint. */ 360 if (resource_disabled("acpi", 0)) 361 return (ENXIO); 362 363 /* Check for other PM systems. */ 364 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 365 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 366 printf("ACPI identify failed, other PM system enabled.\n"); 367 return (ENXIO); 368 } 369 370 /* Initialize root tables. */ 371 if (ACPI_FAILURE(acpi_Startup())) { 372 printf("ACPI: Try disabling either ACPI or apic support.\n"); 373 return (ENXIO); 374 } 375 376 if ((paddr = AcpiOsGetRootPointer()) == 0 || 377 (rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP))) == NULL) 378 return (ENXIO); 379 if (rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress != 0) 380 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress; 381 else 382 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress; 383 AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP)); 384 385 if ((rsdt = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER))) == NULL) 386 return (ENXIO); 387 sbuf_new(&sb, acpi_desc, sizeof(acpi_desc), SBUF_FIXEDLEN); 388 sbuf_bcat(&sb, rsdt->OemId, ACPI_OEM_ID_SIZE); 389 sbuf_trim(&sb); 390 sbuf_putc(&sb, ' '); 391 sbuf_bcat(&sb, rsdt->OemTableId, ACPI_OEM_TABLE_ID_SIZE); 392 sbuf_trim(&sb); 393 sbuf_finish(&sb); 394 sbuf_delete(&sb); 395 AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER)); 396 397 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%x", ACPI_CA_VERSION); 398 399 return (0); 400} 401 402/* 403 * Fetch some descriptive data from ACPI to put in our attach message. 404 */ 405static int 406acpi_probe(device_t dev) 407{ 408 409 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 410 411 device_set_desc(dev, acpi_desc); 412 413 return_VALUE (0); 414} 415 416static int 417acpi_attach(device_t dev) 418{ 419 struct acpi_softc *sc; 420 ACPI_STATUS status; 421 int error, state; 422 UINT32 flags; 423 UINT8 TypeA, TypeB; 424 char *env; 425 426 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 427 428 sc = device_get_softc(dev); 429 sc->acpi_dev = dev; 430 callout_init(&sc->susp_force_to, TRUE); 431 432 error = ENXIO; 433 434 /* Initialize resource manager. */ 435 acpi_rman_io.rm_type = RMAN_ARRAY; 436 acpi_rman_io.rm_start = 0; 437 acpi_rman_io.rm_end = 0xffff; 438 acpi_rman_io.rm_descr = "ACPI I/O ports"; 439 if (rman_init(&acpi_rman_io) != 0) 440 panic("acpi rman_init IO ports failed"); 441 acpi_rman_mem.rm_type = RMAN_ARRAY; 442 acpi_rman_mem.rm_start = 0; 443 acpi_rman_mem.rm_end = ~0ul; 444 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses"; 445 if (rman_init(&acpi_rman_mem) != 0) 446 panic("acpi rman_init memory failed"); 447 448 /* Initialise the ACPI mutex */ 449 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF); 450 451 /* 452 * Set the globals from our tunables. This is needed because ACPI-CA 453 * uses UINT8 for some values and we have no tunable_byte. 454 */ 455 AcpiGbl_AllMethodsSerialized = acpi_serialize_methods; 456 AcpiGbl_EnableInterpreterSlack = TRUE; 457 458 /* Start up the ACPI CA subsystem. */ 459 status = AcpiInitializeSubsystem(); 460 if (ACPI_FAILURE(status)) { 461 device_printf(dev, "Could not initialize Subsystem: %s\n", 462 AcpiFormatException(status)); 463 goto out; 464 } 465 466 /* Load ACPI name space. */ 467 status = AcpiLoadTables(); 468 if (ACPI_FAILURE(status)) { 469 device_printf(dev, "Could not load Namespace: %s\n", 470 AcpiFormatException(status)); 471 goto out; 472 } 473 474#if defined(__i386__) || defined(__amd64__) 475 /* Handle MCFG table if present. */ 476 acpi_enable_pcie(); 477#endif 478 479 /* Install the default address space handlers. */ 480 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 481 ACPI_ADR_SPACE_SYSTEM_MEMORY, ACPI_DEFAULT_HANDLER, NULL, NULL); 482 if (ACPI_FAILURE(status)) { 483 device_printf(dev, "Could not initialise SystemMemory handler: %s\n", 484 AcpiFormatException(status)); 485 goto out; 486 } 487 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 488 ACPI_ADR_SPACE_SYSTEM_IO, ACPI_DEFAULT_HANDLER, NULL, NULL); 489 if (ACPI_FAILURE(status)) { 490 device_printf(dev, "Could not initialise SystemIO handler: %s\n", 491 AcpiFormatException(status)); 492 goto out; 493 } 494 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 495 ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL); 496 if (ACPI_FAILURE(status)) { 497 device_printf(dev, "could not initialise PciConfig handler: %s\n", 498 AcpiFormatException(status)); 499 goto out; 500 } 501 502 /* 503 * Note that some systems (specifically, those with namespace evaluation 504 * issues that require the avoidance of parts of the namespace) must 505 * avoid running _INI and _STA on everything, as well as dodging the final 506 * object init pass. 507 * 508 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 509 * 510 * XXX We should arrange for the object init pass after we have attached 511 * all our child devices, but on many systems it works here. 512 */ 513 flags = 0; 514 if (testenv("debug.acpi.avoid")) 515 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 516 517 /* Bring the hardware and basic handlers online. */ 518 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 519 device_printf(dev, "Could not enable ACPI: %s\n", 520 AcpiFormatException(status)); 521 goto out; 522 } 523 524 /* 525 * Call the ECDT probe function to provide EC functionality before 526 * the namespace has been evaluated. 527 * 528 * XXX This happens before the sysresource devices have been probed and 529 * attached so its resources come from nexus0. In practice, this isn't 530 * a problem but should be addressed eventually. 531 */ 532 acpi_ec_ecdt_probe(dev); 533 534 /* Bring device objects and regions online. */ 535 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 536 device_printf(dev, "Could not initialize ACPI objects: %s\n", 537 AcpiFormatException(status)); 538 goto out; 539 } 540 541 /* 542 * Setup our sysctl tree. 543 * 544 * XXX: This doesn't check to make sure that none of these fail. 545 */ 546 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 547 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 548 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 549 device_get_name(dev), CTLFLAG_RD, 0, ""); 550 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 551 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 552 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 553 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 554 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 555 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 556 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 557 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 558 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 559 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 560 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 561 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 562 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 563 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 564 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 565 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 566 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 567 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 568 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 569 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0, 570 "sleep delay"); 571 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 572 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode"); 573 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 574 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode"); 575 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 576 OID_AUTO, "disable_on_reboot", CTLFLAG_RW, 577 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system"); 578 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 579 OID_AUTO, "handle_reboot", CTLFLAG_RW, 580 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot"); 581 582 /* 583 * Default to 1 second before sleeping to give some machines time to 584 * stabilize. 585 */ 586 sc->acpi_sleep_delay = 1; 587 if (bootverbose) 588 sc->acpi_verbose = 1; 589 if ((env = getenv("hw.acpi.verbose")) != NULL) { 590 if (strcmp(env, "0") != 0) 591 sc->acpi_verbose = 1; 592 freeenv(env); 593 } 594 595 /* Only enable S4BIOS by default if the FACS says it is available. */ 596 if (AcpiGbl_FACS->Flags & ACPI_FACS_S4_BIOS_PRESENT) 597 sc->acpi_s4bios = 1; 598 599 /* Probe all supported sleep states. */ 600 acpi_sleep_states[ACPI_STATE_S0] = TRUE; 601 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++) 602 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) 603 acpi_sleep_states[state] = TRUE; 604 605 /* 606 * Dispatch the default sleep state to devices. The lid switch is set 607 * to UNKNOWN by default to avoid surprising users. 608 */ 609 sc->acpi_power_button_sx = acpi_sleep_states[ACPI_STATE_S5] ? 610 ACPI_STATE_S5 : ACPI_STATE_UNKNOWN; 611 sc->acpi_lid_switch_sx = ACPI_STATE_UNKNOWN; 612 sc->acpi_standby_sx = acpi_sleep_states[ACPI_STATE_S1] ? 613 ACPI_STATE_S1 : ACPI_STATE_UNKNOWN; 614 sc->acpi_suspend_sx = acpi_sleep_states[ACPI_STATE_S3] ? 615 ACPI_STATE_S3 : ACPI_STATE_UNKNOWN; 616 617 /* Pick the first valid sleep state for the sleep button default. */ 618 sc->acpi_sleep_button_sx = ACPI_STATE_UNKNOWN; 619 for (state = ACPI_STATE_S1; state <= ACPI_STATE_S4; state++) 620 if (acpi_sleep_states[state]) { 621 sc->acpi_sleep_button_sx = state; 622 break; 623 } 624 625 acpi_enable_fixed_events(sc); 626 627 /* 628 * Scan the namespace and attach/initialise children. 629 */ 630 631 /* Register our shutdown handler. */ 632 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 633 SHUTDOWN_PRI_LAST); 634 635 /* 636 * Register our acpi event handlers. 637 * XXX should be configurable eg. via userland policy manager. 638 */ 639 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 640 sc, ACPI_EVENT_PRI_LAST); 641 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 642 sc, ACPI_EVENT_PRI_LAST); 643 644 /* Flag our initial states. */ 645 sc->acpi_enabled = TRUE; 646 sc->acpi_sstate = ACPI_STATE_S0; 647 sc->acpi_sleep_disabled = TRUE; 648 649 /* Create the control device */ 650 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644, 651 "acpi"); 652 sc->acpi_dev_t->si_drv1 = sc; 653 654 if ((error = acpi_machdep_init(dev))) 655 goto out; 656 657 /* Register ACPI again to pass the correct argument of pm_func. */ 658 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 659 660 if (!acpi_disabled("bus")) 661 acpi_probe_children(dev); 662 663 /* Allow sleep request after a while. */ 664 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); 665 666 error = 0; 667 668 out: 669 return_VALUE (error); 670} 671 672static int 673acpi_suspend(device_t dev) 674{ 675 device_t child, *devlist; 676 int error, i, numdevs, pstate; 677 678 GIANT_REQUIRED; 679 680 /* First give child devices a chance to suspend. */ 681 error = bus_generic_suspend(dev); 682 if (error) 683 return (error); 684 685 /* 686 * Now, set them into the appropriate power state, usually D3. If the 687 * device has an _SxD method for the next sleep state, use that power 688 * state instead. 689 */ 690 error = device_get_children(dev, &devlist, &numdevs); 691 if (error) 692 return (error); 693 for (i = 0; i < numdevs; i++) { 694 /* If the device is not attached, we've powered it down elsewhere. */ 695 child = devlist[i]; 696 if (!device_is_attached(child)) 697 continue; 698 699 /* 700 * Default to D3 for all sleep states. The _SxD method is optional 701 * so set the powerstate even if it's absent. 702 */ 703 pstate = PCI_POWERSTATE_D3; 704 error = acpi_device_pwr_for_sleep(device_get_parent(child), 705 child, &pstate); 706 if ((error == 0 || error == ESRCH) && acpi_do_powerstate) 707 pci_set_powerstate(child, pstate); 708 } 709 free(devlist, M_TEMP); 710 error = 0; 711 712 return (error); 713} 714 715static int 716acpi_resume(device_t dev) 717{ 718 ACPI_HANDLE handle; 719 int i, numdevs, error; 720 device_t child, *devlist; 721 722 GIANT_REQUIRED; 723 724 /* 725 * Put all devices in D0 before resuming them. Call _S0D on each one 726 * since some systems expect this. 727 */ 728 error = device_get_children(dev, &devlist, &numdevs); 729 if (error) 730 return (error); 731 for (i = 0; i < numdevs; i++) { 732 child = devlist[i]; 733 handle = acpi_get_handle(child); 734 if (handle) 735 AcpiEvaluateObject(handle, "_S0D", NULL, NULL); 736 if (device_is_attached(child) && acpi_do_powerstate) 737 pci_set_powerstate(child, PCI_POWERSTATE_D0); 738 } 739 free(devlist, M_TEMP); 740 741 return (bus_generic_resume(dev)); 742} 743 744static int 745acpi_shutdown(device_t dev) 746{ 747 748 GIANT_REQUIRED; 749 750 /* Allow children to shutdown first. */ 751 bus_generic_shutdown(dev); 752 753 /* 754 * Enable any GPEs that are able to power-on the system (i.e., RTC). 755 * Also, disable any that are not valid for this state (most). 756 */ 757 acpi_wake_prep_walk(ACPI_STATE_S5); 758 759 return (0); 760} 761 762/* 763 * Handle a new device being added 764 */ 765static device_t 766acpi_add_child(device_t bus, int order, const char *name, int unit) 767{ 768 struct acpi_device *ad; 769 device_t child; 770 771 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 772 return (NULL); 773 774 resource_list_init(&ad->ad_rl); 775 776 child = device_add_child_ordered(bus, order, name, unit); 777 if (child != NULL) 778 device_set_ivars(child, ad); 779 else 780 free(ad, M_ACPIDEV); 781 return (child); 782} 783 784static int 785acpi_print_child(device_t bus, device_t child) 786{ 787 struct acpi_device *adev = device_get_ivars(child); 788 struct resource_list *rl = &adev->ad_rl; 789 int retval = 0; 790 791 retval += bus_print_child_header(bus, child); 792 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 793 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 794 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 795 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 796 if (device_get_flags(child)) 797 retval += printf(" flags %#x", device_get_flags(child)); 798 retval += bus_print_child_footer(bus, child); 799 800 return (retval); 801} 802 803/* 804 * If this device is an ACPI child but no one claimed it, attempt 805 * to power it off. We'll power it back up when a driver is added. 806 * 807 * XXX Disabled for now since many necessary devices (like fdc and 808 * ATA) don't claim the devices we created for them but still expect 809 * them to be powered up. 810 */ 811static void 812acpi_probe_nomatch(device_t bus, device_t child) 813{ 814#ifdef ACPI_ENABLE_POWERDOWN_NODRIVER 815 pci_set_powerstate(child, PCI_POWERSTATE_D3); 816#endif 817} 818 819/* 820 * If a new driver has a chance to probe a child, first power it up. 821 * 822 * XXX Disabled for now (see acpi_probe_nomatch for details). 823 */ 824static void 825acpi_driver_added(device_t dev, driver_t *driver) 826{ 827 device_t child, *devlist; 828 int i, numdevs; 829 830 DEVICE_IDENTIFY(driver, dev); 831 if (device_get_children(dev, &devlist, &numdevs)) 832 return; 833 for (i = 0; i < numdevs; i++) { 834 child = devlist[i]; 835 if (device_get_state(child) == DS_NOTPRESENT) { 836#ifdef ACPI_ENABLE_POWERDOWN_NODRIVER 837 pci_set_powerstate(child, PCI_POWERSTATE_D0); 838 if (device_probe_and_attach(child) != 0) 839 pci_set_powerstate(child, PCI_POWERSTATE_D3); 840#else 841 device_probe_and_attach(child); 842#endif 843 } 844 } 845 free(devlist, M_TEMP); 846} 847 848/* Location hint for devctl(8) */ 849static int 850acpi_child_location_str_method(device_t cbdev, device_t child, char *buf, 851 size_t buflen) 852{ 853 struct acpi_device *dinfo = device_get_ivars(child); 854 855 if (dinfo->ad_handle) 856 snprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle)); 857 else 858 snprintf(buf, buflen, "unknown"); 859 return (0); 860} 861 862/* PnP information for devctl(8) */ 863static int 864acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 865 size_t buflen) 866{ 867 struct acpi_device *dinfo = device_get_ivars(child); 868 ACPI_DEVICE_INFO *adinfo; 869 870 if (ACPI_FAILURE(AcpiGetObjectInfo(dinfo->ad_handle, &adinfo))) { 871 snprintf(buf, buflen, "unknown"); 872 return (0); 873 } 874 875 snprintf(buf, buflen, "_HID=%s _UID=%lu", 876 (adinfo->Valid & ACPI_VALID_HID) ? 877 adinfo->HardwareId.String : "none", 878 (adinfo->Valid & ACPI_VALID_UID) ? 879 strtoul(adinfo->UniqueId.String, NULL, 10) : 0UL); 880 AcpiOsFree(adinfo); 881 882 return (0); 883} 884 885/* 886 * Handle per-device ivars 887 */ 888static int 889acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 890{ 891 struct acpi_device *ad; 892 893 if ((ad = device_get_ivars(child)) == NULL) { 894 device_printf(child, "device has no ivars\n"); 895 return (ENOENT); 896 } 897 898 /* ACPI and ISA compatibility ivars */ 899 switch(index) { 900 case ACPI_IVAR_HANDLE: 901 *(ACPI_HANDLE *)result = ad->ad_handle; 902 break; 903 case ACPI_IVAR_MAGIC: 904 *(uintptr_t *)result = ad->ad_magic; 905 break; 906 case ACPI_IVAR_PRIVATE: 907 *(void **)result = ad->ad_private; 908 break; 909 case ACPI_IVAR_FLAGS: 910 *(int *)result = ad->ad_flags; 911 break; 912 case ISA_IVAR_VENDORID: 913 case ISA_IVAR_SERIAL: 914 case ISA_IVAR_COMPATID: 915 *(int *)result = -1; 916 break; 917 case ISA_IVAR_LOGICALID: 918 *(int *)result = acpi_isa_get_logicalid(child); 919 break; 920 default: 921 return (ENOENT); 922 } 923 924 return (0); 925} 926 927static int 928acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 929{ 930 struct acpi_device *ad; 931 932 if ((ad = device_get_ivars(child)) == NULL) { 933 device_printf(child, "device has no ivars\n"); 934 return (ENOENT); 935 } 936 937 switch(index) { 938 case ACPI_IVAR_HANDLE: 939 ad->ad_handle = (ACPI_HANDLE)value; 940 break; 941 case ACPI_IVAR_MAGIC: 942 ad->ad_magic = (uintptr_t)value; 943 break; 944 case ACPI_IVAR_PRIVATE: 945 ad->ad_private = (void *)value; 946 break; 947 case ACPI_IVAR_FLAGS: 948 ad->ad_flags = (int)value; 949 break; 950 default: 951 panic("bad ivar write request (%d)", index); 952 return (ENOENT); 953 } 954 955 return (0); 956} 957 958/* 959 * Handle child resource allocation/removal 960 */ 961static struct resource_list * 962acpi_get_rlist(device_t dev, device_t child) 963{ 964 struct acpi_device *ad; 965 966 ad = device_get_ivars(child); 967 return (&ad->ad_rl); 968} 969 970static int 971acpi_match_resource_hint(device_t dev, int type, long value) 972{ 973 struct acpi_device *ad = device_get_ivars(dev); 974 struct resource_list *rl = &ad->ad_rl; 975 struct resource_list_entry *rle; 976 977 STAILQ_FOREACH(rle, rl, link) { 978 if (rle->type != type) 979 continue; 980 if (rle->start <= value && rle->end >= value) 981 return (1); 982 } 983 return (0); 984} 985 986/* 987 * Wire device unit numbers based on resource matches in hints. 988 */ 989static void 990acpi_hint_device_unit(device_t acdev, device_t child, const char *name, 991 int *unitp) 992{ 993 const char *s; 994 long value; 995 int line, matches, unit; 996 997 /* 998 * Iterate over all the hints for the devices with the specified 999 * name to see if one's resources are a subset of this device. 1000 */ 1001 line = 0; 1002 for (;;) { 1003 if (resource_find_dev(&line, name, &unit, "at", NULL) != 0) 1004 break; 1005 1006 /* Must have an "at" for acpi or isa. */ 1007 resource_string_value(name, unit, "at", &s); 1008 if (!(strcmp(s, "acpi0") == 0 || strcmp(s, "acpi") == 0 || 1009 strcmp(s, "isa0") == 0 || strcmp(s, "isa") == 0)) 1010 continue; 1011 1012 /* 1013 * Check for matching resources. We must have at least one match. 1014 * Since I/O and memory resources cannot be shared, if we get a 1015 * match on either of those, ignore any mismatches in IRQs or DRQs. 1016 * 1017 * XXX: We may want to revisit this to be more lenient and wire 1018 * as long as it gets one match. 1019 */ 1020 matches = 0; 1021 if (resource_long_value(name, unit, "port", &value) == 0) { 1022 /* 1023 * Floppy drive controllers are notorious for having a 1024 * wide variety of resources not all of which include the 1025 * first port that is specified by the hint (typically 1026 * 0x3f0) (see the comment above fdc_isa_alloc_resources() 1027 * in fdc_isa.c). However, they do all seem to include 1028 * port + 2 (e.g. 0x3f2) so for a floppy device, look for 1029 * 'value + 2' in the port resources instead of the hint 1030 * value. 1031 */ 1032 if (strcmp(name, "fdc") == 0) 1033 value += 2; 1034 if (acpi_match_resource_hint(child, SYS_RES_IOPORT, value)) 1035 matches++; 1036 else 1037 continue; 1038 } 1039 if (resource_long_value(name, unit, "maddr", &value) == 0) { 1040 if (acpi_match_resource_hint(child, SYS_RES_MEMORY, value)) 1041 matches++; 1042 else 1043 continue; 1044 } 1045 if (matches > 0) 1046 goto matched; 1047 if (resource_long_value(name, unit, "irq", &value) == 0) { 1048 if (acpi_match_resource_hint(child, SYS_RES_IRQ, value)) 1049 matches++; 1050 else 1051 continue; 1052 } 1053 if (resource_long_value(name, unit, "drq", &value) == 0) { 1054 if (acpi_match_resource_hint(child, SYS_RES_DRQ, value)) 1055 matches++; 1056 else 1057 continue; 1058 } 1059 1060 matched: 1061 if (matches > 0) { 1062 /* We have a winner! */ 1063 *unitp = unit; 1064 break; 1065 } 1066 } 1067} 1068 1069/* 1070 * Pre-allocate/manage all memory and IO resources. Since rman can't handle 1071 * duplicates, we merge any in the sysresource attach routine. 1072 */ 1073static int 1074acpi_sysres_alloc(device_t dev) 1075{ 1076 struct resource *res; 1077 struct resource_list *rl; 1078 struct resource_list_entry *rle; 1079 struct rman *rm; 1080 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 1081 device_t *children; 1082 int child_count, i; 1083 1084 /* 1085 * Probe/attach any sysresource devices. This would be unnecessary if we 1086 * had multi-pass probe/attach. 1087 */ 1088 if (device_get_children(dev, &children, &child_count) != 0) 1089 return (ENXIO); 1090 for (i = 0; i < child_count; i++) { 1091 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 1092 device_probe_and_attach(children[i]); 1093 } 1094 free(children, M_TEMP); 1095 1096 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev); 1097 STAILQ_FOREACH(rle, rl, link) { 1098 if (rle->res != NULL) { 1099 device_printf(dev, "duplicate resource for %lx\n", rle->start); 1100 continue; 1101 } 1102 1103 /* Only memory and IO resources are valid here. */ 1104 switch (rle->type) { 1105 case SYS_RES_IOPORT: 1106 rm = &acpi_rman_io; 1107 break; 1108 case SYS_RES_MEMORY: 1109 rm = &acpi_rman_mem; 1110 break; 1111 default: 1112 continue; 1113 } 1114 1115 /* Pre-allocate resource and add to our rman pool. */ 1116 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type, 1117 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 0); 1118 if (res != NULL) { 1119 rman_manage_region(rm, rman_get_start(res), rman_get_end(res)); 1120 rle->res = res; 1121 } else 1122 device_printf(dev, "reservation of %lx, %lx (%d) failed\n", 1123 rle->start, rle->count, rle->type); 1124 } 1125 return (0); 1126} 1127 1128static struct resource * 1129acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 1130 u_long start, u_long end, u_long count, u_int flags) 1131{ 1132 ACPI_RESOURCE ares; 1133 struct acpi_device *ad = device_get_ivars(child); 1134 struct resource_list *rl = &ad->ad_rl; 1135 struct resource_list_entry *rle; 1136 struct resource *res; 1137 struct rman *rm; 1138 1139 res = NULL; 1140 1141 /* We only handle memory and IO resources through rman. */ 1142 switch (type) { 1143 case SYS_RES_IOPORT: 1144 rm = &acpi_rman_io; 1145 break; 1146 case SYS_RES_MEMORY: 1147 rm = &acpi_rman_mem; 1148 break; 1149 default: 1150 rm = NULL; 1151 } 1152 1153 ACPI_SERIAL_BEGIN(acpi); 1154 1155 /* 1156 * If this is an allocation of the "default" range for a given RID, and 1157 * we know what the resources for this device are (i.e., they're on the 1158 * child's resource list), use those start/end values. 1159 */ 1160 if (bus == device_get_parent(child) && start == 0UL && end == ~0UL) { 1161 rle = resource_list_find(rl, type, *rid); 1162 if (rle == NULL) 1163 goto out; 1164 start = rle->start; 1165 end = rle->end; 1166 count = rle->count; 1167 } 1168 1169 /* 1170 * If this is an allocation of a specific range, see if we can satisfy 1171 * the request from our system resource regions. If we can't, pass the 1172 * request up to the parent. 1173 */ 1174 if (start + count - 1 == end && rm != NULL) 1175 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE, 1176 child); 1177 if (res == NULL) { 1178 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid, 1179 start, end, count, flags); 1180 } else { 1181 rman_set_rid(res, *rid); 1182 1183 /* If requested, activate the resource using the parent's method. */ 1184 if (flags & RF_ACTIVE) 1185 if (bus_activate_resource(child, type, *rid, res) != 0) { 1186 rman_release_resource(res); 1187 res = NULL; 1188 goto out; 1189 } 1190 } 1191 1192 if (res != NULL && device_get_parent(child) == bus) 1193 switch (type) { 1194 case SYS_RES_IRQ: 1195 /* 1196 * Since bus_config_intr() takes immediate effect, we cannot 1197 * configure the interrupt associated with a device when we 1198 * parse the resources but have to defer it until a driver 1199 * actually allocates the interrupt via bus_alloc_resource(). 1200 * 1201 * XXX: Should we handle the lookup failing? 1202 */ 1203 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares))) 1204 acpi_config_intr(child, &ares); 1205 break; 1206 } 1207 1208out: 1209 ACPI_SERIAL_END(acpi); 1210 return (res); 1211} 1212 1213static int 1214acpi_release_resource(device_t bus, device_t child, int type, int rid, 1215 struct resource *r) 1216{ 1217 struct rman *rm; 1218 int ret; 1219 1220 /* We only handle memory and IO resources through rman. */ 1221 switch (type) { 1222 case SYS_RES_IOPORT: 1223 rm = &acpi_rman_io; 1224 break; 1225 case SYS_RES_MEMORY: 1226 rm = &acpi_rman_mem; 1227 break; 1228 default: 1229 rm = NULL; 1230 } 1231 1232 ACPI_SERIAL_BEGIN(acpi); 1233 1234 /* 1235 * If this resource belongs to one of our internal managers, 1236 * deactivate it and release it to the local pool. If it doesn't, 1237 * pass this request up to the parent. 1238 */ 1239 if (rm != NULL && rman_is_region_manager(r, rm)) { 1240 if (rman_get_flags(r) & RF_ACTIVE) { 1241 ret = bus_deactivate_resource(child, type, rid, r); 1242 if (ret != 0) 1243 goto out; 1244 } 1245 ret = rman_release_resource(r); 1246 } else 1247 ret = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, type, rid, r); 1248 1249out: 1250 ACPI_SERIAL_END(acpi); 1251 return (ret); 1252} 1253 1254static void 1255acpi_delete_resource(device_t bus, device_t child, int type, int rid) 1256{ 1257 struct resource_list *rl; 1258 1259 rl = acpi_get_rlist(bus, child); 1260 resource_list_delete(rl, type, rid); 1261} 1262 1263/* Allocate an IO port or memory resource, given its GAS. */ 1264int 1265acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas, 1266 struct resource **res, u_int flags) 1267{ 1268 int error, res_type; 1269 1270 error = ENOMEM; 1271 if (type == NULL || rid == NULL || gas == NULL || res == NULL) 1272 return (EINVAL); 1273 1274 /* We only support memory and IO spaces. */ 1275 switch (gas->SpaceId) { 1276 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1277 res_type = SYS_RES_MEMORY; 1278 break; 1279 case ACPI_ADR_SPACE_SYSTEM_IO: 1280 res_type = SYS_RES_IOPORT; 1281 break; 1282 default: 1283 return (EOPNOTSUPP); 1284 } 1285 1286 /* 1287 * If the register width is less than 8, assume the BIOS author means 1288 * it is a bit field and just allocate a byte. 1289 */ 1290 if (gas->BitWidth && gas->BitWidth < 8) 1291 gas->BitWidth = 8; 1292 1293 /* Validate the address after we're sure we support the space. */ 1294 if (gas->Address == 0 || gas->BitWidth == 0) 1295 return (EINVAL); 1296 1297 bus_set_resource(dev, res_type, *rid, gas->Address, 1298 gas->BitWidth / 8); 1299 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags); 1300 if (*res != NULL) { 1301 *type = res_type; 1302 error = 0; 1303 } else 1304 bus_delete_resource(dev, res_type, *rid); 1305 1306 return (error); 1307} 1308 1309/* Probe _HID and _CID for compatible ISA PNP ids. */ 1310static uint32_t 1311acpi_isa_get_logicalid(device_t dev) 1312{ 1313 ACPI_DEVICE_INFO *devinfo; 1314 ACPI_HANDLE h; 1315 uint32_t pnpid; 1316 1317 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1318 1319 /* Fetch and validate the HID. */ 1320 if ((h = acpi_get_handle(dev)) == NULL || 1321 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1322 return_VALUE (0); 1323 1324 pnpid = (devinfo->Valid & ACPI_VALID_HID) != 0 && 1325 devinfo->HardwareId.Length >= ACPI_EISAID_STRING_SIZE ? 1326 PNP_EISAID(devinfo->HardwareId.String) : 0; 1327 AcpiOsFree(devinfo); 1328 1329 return_VALUE (pnpid); 1330} 1331 1332static int 1333acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 1334{ 1335 ACPI_DEVICE_INFO *devinfo; 1336 ACPI_DEVICE_ID *ids; 1337 ACPI_HANDLE h; 1338 uint32_t *pnpid; 1339 int i, valid; 1340 1341 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1342 1343 pnpid = cids; 1344 1345 /* Fetch and validate the CID */ 1346 if ((h = acpi_get_handle(dev)) == NULL || 1347 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1348 return_VALUE (0); 1349 1350 if ((devinfo->Valid & ACPI_VALID_CID) == 0) { 1351 AcpiOsFree(devinfo); 1352 return_VALUE (0); 1353 } 1354 1355 if (devinfo->CompatibleIdList.Count < count) 1356 count = devinfo->CompatibleIdList.Count; 1357 ids = devinfo->CompatibleIdList.Ids; 1358 for (i = 0, valid = 0; i < count; i++) 1359 if (ids[i].Length >= ACPI_EISAID_STRING_SIZE && 1360 strncmp(ids[i].String, "PNP", 3) == 0) { 1361 *pnpid++ = PNP_EISAID(ids[i].String); 1362 valid++; 1363 } 1364 AcpiOsFree(devinfo); 1365 1366 return_VALUE (valid); 1367} 1368 1369static char * 1370acpi_device_id_probe(device_t bus, device_t dev, char **ids) 1371{ 1372 ACPI_HANDLE h; 1373 ACPI_OBJECT_TYPE t; 1374 int i; 1375 1376 h = acpi_get_handle(dev); 1377 if (ids == NULL || h == NULL) 1378 return (NULL); 1379 t = acpi_get_type(dev); 1380 if (t != ACPI_TYPE_DEVICE && t != ACPI_TYPE_PROCESSOR) 1381 return (NULL); 1382 1383 /* Try to match one of the array of IDs with a HID or CID. */ 1384 for (i = 0; ids[i] != NULL; i++) { 1385 if (acpi_MatchHid(h, ids[i])) 1386 return (ids[i]); 1387 } 1388 return (NULL); 1389} 1390 1391static ACPI_STATUS 1392acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname, 1393 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret) 1394{ 1395 ACPI_HANDLE h; 1396 1397 if (dev == NULL) 1398 h = ACPI_ROOT_OBJECT; 1399 else if ((h = acpi_get_handle(dev)) == NULL) 1400 return (AE_BAD_PARAMETER); 1401 return (AcpiEvaluateObject(h, pathname, parameters, ret)); 1402} 1403 1404static int 1405acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate) 1406{ 1407 struct acpi_softc *sc; 1408 ACPI_HANDLE handle; 1409 ACPI_STATUS status; 1410 char sxd[8]; 1411 int error; 1412 1413 sc = device_get_softc(bus); 1414 handle = acpi_get_handle(dev); 1415 1416 /* 1417 * XXX If we find these devices, don't try to power them down. 1418 * The serial and IRDA ports on my T23 hang the system when 1419 * set to D3 and it appears that such legacy devices may 1420 * need special handling in their drivers. 1421 */ 1422 if (handle == NULL || 1423 acpi_MatchHid(handle, "PNP0500") || 1424 acpi_MatchHid(handle, "PNP0501") || 1425 acpi_MatchHid(handle, "PNP0502") || 1426 acpi_MatchHid(handle, "PNP0510") || 1427 acpi_MatchHid(handle, "PNP0511")) 1428 return (ENXIO); 1429 1430 /* 1431 * Override next state with the value from _SxD, if present. If no 1432 * dstate argument was provided, don't fetch the return value. 1433 */ 1434 snprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate); 1435 if (dstate) 1436 status = acpi_GetInteger(handle, sxd, dstate); 1437 else 1438 status = AcpiEvaluateObject(handle, sxd, NULL, NULL); 1439 1440 switch (status) { 1441 case AE_OK: 1442 error = 0; 1443 break; 1444 case AE_NOT_FOUND: 1445 error = ESRCH; 1446 break; 1447 default: 1448 error = ENXIO; 1449 break; 1450 } 1451 1452 return (error); 1453} 1454 1455/* Callback arg for our implementation of walking the namespace. */ 1456struct acpi_device_scan_ctx { 1457 acpi_scan_cb_t user_fn; 1458 void *arg; 1459 ACPI_HANDLE parent; 1460}; 1461 1462static ACPI_STATUS 1463acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval) 1464{ 1465 struct acpi_device_scan_ctx *ctx; 1466 device_t dev, old_dev; 1467 ACPI_STATUS status; 1468 ACPI_OBJECT_TYPE type; 1469 1470 /* 1471 * Skip this device if we think we'll have trouble with it or it is 1472 * the parent where the scan began. 1473 */ 1474 ctx = (struct acpi_device_scan_ctx *)arg; 1475 if (acpi_avoid(h) || h == ctx->parent) 1476 return (AE_OK); 1477 1478 /* If this is not a valid device type (e.g., a method), skip it. */ 1479 if (ACPI_FAILURE(AcpiGetType(h, &type))) 1480 return (AE_OK); 1481 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR && 1482 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER) 1483 return (AE_OK); 1484 1485 /* 1486 * Call the user function with the current device. If it is unchanged 1487 * afterwards, return. Otherwise, we update the handle to the new dev. 1488 */ 1489 old_dev = acpi_get_device(h); 1490 dev = old_dev; 1491 status = ctx->user_fn(h, &dev, level, ctx->arg); 1492 if (ACPI_FAILURE(status) || old_dev == dev) 1493 return (status); 1494 1495 /* Remove the old child and its connection to the handle. */ 1496 if (old_dev != NULL) { 1497 device_delete_child(device_get_parent(old_dev), old_dev); 1498 AcpiDetachData(h, acpi_fake_objhandler); 1499 } 1500 1501 /* Recreate the handle association if the user created a device. */ 1502 if (dev != NULL) 1503 AcpiAttachData(h, acpi_fake_objhandler, dev); 1504 1505 return (AE_OK); 1506} 1507 1508static ACPI_STATUS 1509acpi_device_scan_children(device_t bus, device_t dev, int max_depth, 1510 acpi_scan_cb_t user_fn, void *arg) 1511{ 1512 ACPI_HANDLE h; 1513 struct acpi_device_scan_ctx ctx; 1514 1515 if (acpi_disabled("children")) 1516 return (AE_OK); 1517 1518 if (dev == NULL) 1519 h = ACPI_ROOT_OBJECT; 1520 else if ((h = acpi_get_handle(dev)) == NULL) 1521 return (AE_BAD_PARAMETER); 1522 ctx.user_fn = user_fn; 1523 ctx.arg = arg; 1524 ctx.parent = h; 1525 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth, 1526 acpi_device_scan_cb, &ctx, NULL)); 1527} 1528 1529/* 1530 * Even though ACPI devices are not PCI, we use the PCI approach for setting 1531 * device power states since it's close enough to ACPI. 1532 */ 1533static int 1534acpi_set_powerstate_method(device_t bus, device_t child, int state) 1535{ 1536 ACPI_HANDLE h; 1537 ACPI_STATUS status; 1538 int error; 1539 1540 error = 0; 1541 h = acpi_get_handle(child); 1542 if (state < ACPI_STATE_D0 || state > ACPI_D_STATES_MAX) 1543 return (EINVAL); 1544 if (h == NULL) 1545 return (0); 1546 1547 /* Ignore errors if the power methods aren't present. */ 1548 status = acpi_pwr_switch_consumer(h, state); 1549 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND 1550 && status != AE_BAD_PARAMETER) 1551 device_printf(bus, "failed to set ACPI power state D%d on %s: %s\n", 1552 state, acpi_name(h), AcpiFormatException(status)); 1553 1554 return (error); 1555} 1556 1557static int 1558acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 1559{ 1560 int result, cid_count, i; 1561 uint32_t lid, cids[8]; 1562 1563 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1564 1565 /* 1566 * ISA-style drivers attached to ACPI may persist and 1567 * probe manually if we return ENOENT. We never want 1568 * that to happen, so don't ever return it. 1569 */ 1570 result = ENXIO; 1571 1572 /* Scan the supplied IDs for a match */ 1573 lid = acpi_isa_get_logicalid(child); 1574 cid_count = acpi_isa_get_compatid(child, cids, 8); 1575 while (ids && ids->ip_id) { 1576 if (lid == ids->ip_id) { 1577 result = 0; 1578 goto out; 1579 } 1580 for (i = 0; i < cid_count; i++) { 1581 if (cids[i] == ids->ip_id) { 1582 result = 0; 1583 goto out; 1584 } 1585 } 1586 ids++; 1587 } 1588 1589 out: 1590 if (result == 0 && ids->ip_desc) 1591 device_set_desc(child, ids->ip_desc); 1592 1593 return_VALUE (result); 1594} 1595 1596#if defined(__i386__) || defined(__amd64__) 1597/* 1598 * Look for a MCFG table. If it is present, use the settings for 1599 * domain (segment) 0 to setup PCI config space access via the memory 1600 * map. 1601 */ 1602static void 1603acpi_enable_pcie(void) 1604{ 1605 ACPI_TABLE_HEADER *hdr; 1606 ACPI_MCFG_ALLOCATION *alloc, *end; 1607 ACPI_STATUS status; 1608 1609 status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr); 1610 if (ACPI_FAILURE(status)) 1611 return; 1612 1613 end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length); 1614 alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1); 1615 while (alloc < end) { 1616 if (alloc->PciSegment == 0) { 1617 pcie_cfgregopen(alloc->Address, alloc->StartBusNumber, 1618 alloc->EndBusNumber); 1619 return; 1620 } 1621 alloc++; 1622 } 1623} 1624#endif 1625 1626/* 1627 * Scan all of the ACPI namespace and attach child devices. 1628 * 1629 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and 1630 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec. 1631 * However, in violation of the spec, some systems place their PCI link 1632 * devices in \, so we have to walk the whole namespace. We check the 1633 * type of namespace nodes, so this should be ok. 1634 */ 1635static void 1636acpi_probe_children(device_t bus) 1637{ 1638 1639 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1640 1641 /* 1642 * Scan the namespace and insert placeholders for all the devices that 1643 * we find. We also probe/attach any early devices. 1644 * 1645 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1646 * we want to create nodes for all devices, not just those that are 1647 * currently present. (This assumes that we don't want to create/remove 1648 * devices as they appear, which might be smarter.) 1649 */ 1650 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1651 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, acpi_probe_child, 1652 bus, NULL); 1653 1654 /* Pre-allocate resources for our rman from any sysresource devices. */ 1655 acpi_sysres_alloc(bus); 1656 1657 /* Create any static children by calling device identify methods. */ 1658 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1659 bus_generic_probe(bus); 1660 1661 /* Probe/attach all children, created staticly and from the namespace. */ 1662 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 1663 bus_generic_attach(bus); 1664 1665 /* 1666 * Some of these children may have attached others as part of their attach 1667 * process (eg. the root PCI bus driver), so rescan. 1668 */ 1669 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 1670 bus_generic_attach(bus); 1671 1672 /* Attach wake sysctls. */ 1673 acpi_wake_sysctl_walk(bus); 1674 1675 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1676 return_VOID; 1677} 1678 1679/* 1680 * Determine the probe order for a given device. 1681 */ 1682static void 1683acpi_probe_order(ACPI_HANDLE handle, int *order) 1684{ 1685 ACPI_OBJECT_TYPE type; 1686 1687 /* 1688 * 1. I/O port and memory system resource holders 1689 * 2. Embedded controllers (to handle early accesses) 1690 * 3. PCI Link Devices 1691 * 100000. CPUs 1692 */ 1693 AcpiGetType(handle, &type); 1694 if (acpi_MatchHid(handle, "PNP0C01") || acpi_MatchHid(handle, "PNP0C02")) 1695 *order = 1; 1696 else if (acpi_MatchHid(handle, "PNP0C09")) 1697 *order = 2; 1698 else if (acpi_MatchHid(handle, "PNP0C0F")) 1699 *order = 3; 1700 else if (type == ACPI_TYPE_PROCESSOR) 1701 *order = 100000; 1702} 1703 1704/* 1705 * Evaluate a child device and determine whether we might attach a device to 1706 * it. 1707 */ 1708static ACPI_STATUS 1709acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1710{ 1711 ACPI_OBJECT_TYPE type; 1712 ACPI_HANDLE h; 1713 device_t bus, child; 1714 int order; 1715 char *handle_str, **search; 1716 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI_", "\\_SB_", NULL}; 1717 1718 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1719 1720 /* Skip this device if we think we'll have trouble with it. */ 1721 if (acpi_avoid(handle)) 1722 return_ACPI_STATUS (AE_OK); 1723 1724 bus = (device_t)context; 1725 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1726 switch (type) { 1727 case ACPI_TYPE_DEVICE: 1728 case ACPI_TYPE_PROCESSOR: 1729 case ACPI_TYPE_THERMAL: 1730 case ACPI_TYPE_POWER: 1731 if (acpi_disabled("children")) 1732 break; 1733 1734 /* 1735 * Since we scan from \, be sure to skip system scope objects. 1736 * At least \_SB and \_TZ are detected as devices (ACPI-CA bug?) 1737 */ 1738 handle_str = acpi_name(handle); 1739 for (search = scopes; *search != NULL; search++) { 1740 if (strcmp(handle_str, *search) == 0) 1741 break; 1742 } 1743 if (*search != NULL) 1744 break; 1745 1746 /* 1747 * Create a placeholder device for this node. Sort the 1748 * placeholder so that the probe/attach passes will run 1749 * breadth-first. Orders less than ACPI_DEV_BASE_ORDER 1750 * are reserved for special objects (i.e., system 1751 * resources). CPU devices have a very high order to 1752 * ensure they are probed after other devices. 1753 */ 1754 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str)); 1755 order = level * 10 + 100; 1756 acpi_probe_order(handle, &order); 1757 child = BUS_ADD_CHILD(bus, order, NULL, -1); 1758 if (child == NULL) 1759 break; 1760 1761 /* Associate the handle with the device_t and vice versa. */ 1762 acpi_set_handle(child, handle); 1763 AcpiAttachData(handle, acpi_fake_objhandler, child); 1764 1765 /* 1766 * Check that the device is present. If it's not present, 1767 * leave it disabled (so that we have a device_t attached to 1768 * the handle, but we don't probe it). 1769 * 1770 * XXX PCI link devices sometimes report "present" but not 1771 * "functional" (i.e. if disabled). Go ahead and probe them 1772 * anyway since we may enable them later. 1773 */ 1774 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 1775 /* Never disable PCI link devices. */ 1776 if (acpi_MatchHid(handle, "PNP0C0F")) 1777 break; 1778 /* 1779 * Docking stations should remain enabled since the system 1780 * may be undocked at boot. 1781 */ 1782 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h))) 1783 break; 1784 1785 device_disable(child); 1786 break; 1787 } 1788 1789 /* 1790 * Get the device's resource settings and attach them. 1791 * Note that if the device has _PRS but no _CRS, we need 1792 * to decide when it's appropriate to try to configure the 1793 * device. Ignore the return value here; it's OK for the 1794 * device not to have any resources. 1795 */ 1796 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 1797 break; 1798 } 1799 } 1800 1801 return_ACPI_STATUS (AE_OK); 1802} 1803 1804/* 1805 * AcpiAttachData() requires an object handler but never uses it. This is a 1806 * placeholder object handler so we can store a device_t in an ACPI_HANDLE. 1807 */ 1808void 1809acpi_fake_objhandler(ACPI_HANDLE h, void *data) 1810{ 1811} 1812 1813static void 1814acpi_shutdown_final(void *arg, int howto) 1815{ 1816 struct acpi_softc *sc = (struct acpi_softc *)arg; 1817 ACPI_STATUS status; 1818 1819 /* 1820 * XXX Shutdown code should only run on the BSP (cpuid 0). 1821 * Some chipsets do not power off the system correctly if called from 1822 * an AP. 1823 */ 1824 if ((howto & RB_POWEROFF) != 0) { 1825 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 1826 if (ACPI_FAILURE(status)) { 1827 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 1828 AcpiFormatException(status)); 1829 return; 1830 } 1831 device_printf(sc->acpi_dev, "Powering system off\n"); 1832 ACPI_DISABLE_IRQS(); 1833 status = AcpiEnterSleepState(ACPI_STATE_S5); 1834 if (ACPI_FAILURE(status)) 1835 device_printf(sc->acpi_dev, "power-off failed - %s\n", 1836 AcpiFormatException(status)); 1837 else { 1838 DELAY(1000000); 1839 device_printf(sc->acpi_dev, "power-off failed - timeout\n"); 1840 } 1841 } else if ((howto & RB_HALT) == 0 && 1842 (AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) && 1843 sc->acpi_handle_reboot) { 1844 /* Reboot using the reset register. */ 1845 status = AcpiWrite( 1846 AcpiGbl_FADT.ResetValue, &AcpiGbl_FADT.ResetRegister); 1847 if (ACPI_FAILURE(status)) 1848 device_printf(sc->acpi_dev, "reset failed - %s\n", 1849 AcpiFormatException(status)); 1850 else { 1851 DELAY(1000000); 1852 device_printf(sc->acpi_dev, "reset failed - timeout\n"); 1853 } 1854 } else if (sc->acpi_do_disable && panicstr == NULL) { 1855 /* 1856 * Only disable ACPI if the user requested. On some systems, writing 1857 * the disable value to SMI_CMD hangs the system. 1858 */ 1859 device_printf(sc->acpi_dev, "Shutting down\n"); 1860 AcpiTerminate(); 1861 } 1862} 1863 1864static void 1865acpi_enable_fixed_events(struct acpi_softc *sc) 1866{ 1867 static int first_time = 1; 1868 1869 /* Enable and clear fixed events and install handlers. */ 1870 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) { 1871 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 1872 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 1873 acpi_event_power_button_sleep, sc); 1874 if (first_time) 1875 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 1876 } 1877 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) { 1878 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 1879 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 1880 acpi_event_sleep_button_sleep, sc); 1881 if (first_time) 1882 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 1883 } 1884 1885 first_time = 0; 1886} 1887 1888/* 1889 * Returns true if the device is actually present and should 1890 * be attached to. This requires the present, enabled, UI-visible 1891 * and diagnostics-passed bits to be set. 1892 */ 1893BOOLEAN 1894acpi_DeviceIsPresent(device_t dev) 1895{ 1896 ACPI_DEVICE_INFO *devinfo; 1897 ACPI_HANDLE h; 1898 BOOLEAN present; 1899 1900 if ((h = acpi_get_handle(dev)) == NULL || 1901 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1902 return (FALSE); 1903 1904 /* If no _STA method, must be present */ 1905 present = (devinfo->Valid & ACPI_VALID_STA) == 0 || 1906 ACPI_DEVICE_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE; 1907 1908 AcpiOsFree(devinfo); 1909 return (present); 1910} 1911 1912/* 1913 * Returns true if the battery is actually present and inserted. 1914 */ 1915BOOLEAN 1916acpi_BatteryIsPresent(device_t dev) 1917{ 1918 ACPI_DEVICE_INFO *devinfo; 1919 ACPI_HANDLE h; 1920 BOOLEAN present; 1921 1922 if ((h = acpi_get_handle(dev)) == NULL || 1923 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1924 return (FALSE); 1925 1926 /* If no _STA method, must be present */ 1927 present = (devinfo->Valid & ACPI_VALID_STA) == 0 || 1928 ACPI_BATTERY_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE; 1929 1930 AcpiOsFree(devinfo); 1931 return (present); 1932} 1933 1934/* 1935 * Match a HID string against a handle 1936 */ 1937static BOOLEAN 1938acpi_MatchHid(ACPI_HANDLE h, const char *hid) 1939{ 1940 ACPI_DEVICE_INFO *devinfo; 1941 BOOLEAN ret; 1942 int i; 1943 1944 if (hid == NULL || h == NULL || 1945 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1946 return (FALSE); 1947 1948 ret = FALSE; 1949 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 1950 strcmp(hid, devinfo->HardwareId.String) == 0) 1951 ret = TRUE; 1952 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) 1953 for (i = 0; i < devinfo->CompatibleIdList.Count; i++) { 1954 if (strcmp(hid, devinfo->CompatibleIdList.Ids[i].String) == 0) { 1955 ret = TRUE; 1956 break; 1957 } 1958 } 1959 1960 AcpiOsFree(devinfo); 1961 return (ret); 1962} 1963 1964/* 1965 * Return the handle of a named object within our scope, ie. that of (parent) 1966 * or one if its parents. 1967 */ 1968ACPI_STATUS 1969acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 1970{ 1971 ACPI_HANDLE r; 1972 ACPI_STATUS status; 1973 1974 /* Walk back up the tree to the root */ 1975 for (;;) { 1976 status = AcpiGetHandle(parent, path, &r); 1977 if (ACPI_SUCCESS(status)) { 1978 *result = r; 1979 return (AE_OK); 1980 } 1981 /* XXX Return error here? */ 1982 if (status != AE_NOT_FOUND) 1983 return (AE_OK); 1984 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 1985 return (AE_NOT_FOUND); 1986 parent = r; 1987 } 1988} 1989 1990/* Find the difference between two PM tick counts. */ 1991uint32_t 1992acpi_TimerDelta(uint32_t end, uint32_t start) 1993{ 1994 uint32_t delta; 1995 1996 if (end >= start) 1997 delta = end - start; 1998 else if (AcpiGbl_FADT.Flags & ACPI_FADT_32BIT_TIMER) 1999 delta = ((0xFFFFFFFF - start) + end + 1); 2000 else 2001 delta = ((0x00FFFFFF - start) + end + 1) & 0x00FFFFFF; 2002 return (delta); 2003} 2004 2005/* 2006 * Allocate a buffer with a preset data size. 2007 */ 2008ACPI_BUFFER * 2009acpi_AllocBuffer(int size) 2010{ 2011 ACPI_BUFFER *buf; 2012 2013 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 2014 return (NULL); 2015 buf->Length = size; 2016 buf->Pointer = (void *)(buf + 1); 2017 return (buf); 2018} 2019 2020ACPI_STATUS 2021acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 2022{ 2023 ACPI_OBJECT arg1; 2024 ACPI_OBJECT_LIST args; 2025 2026 arg1.Type = ACPI_TYPE_INTEGER; 2027 arg1.Integer.Value = number; 2028 args.Count = 1; 2029 args.Pointer = &arg1; 2030 2031 return (AcpiEvaluateObject(handle, path, &args, NULL)); 2032} 2033 2034/* 2035 * Evaluate a path that should return an integer. 2036 */ 2037ACPI_STATUS 2038acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 2039{ 2040 ACPI_STATUS status; 2041 ACPI_BUFFER buf; 2042 ACPI_OBJECT param; 2043 2044 if (handle == NULL) 2045 handle = ACPI_ROOT_OBJECT; 2046 2047 /* 2048 * Assume that what we've been pointed at is an Integer object, or 2049 * a method that will return an Integer. 2050 */ 2051 buf.Pointer = ¶m; 2052 buf.Length = sizeof(param); 2053 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2054 if (ACPI_SUCCESS(status)) { 2055 if (param.Type == ACPI_TYPE_INTEGER) 2056 *number = param.Integer.Value; 2057 else 2058 status = AE_TYPE; 2059 } 2060 2061 /* 2062 * In some applications, a method that's expected to return an Integer 2063 * may instead return a Buffer (probably to simplify some internal 2064 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 2065 * convert it into an Integer as best we can. 2066 * 2067 * This is a hack. 2068 */ 2069 if (status == AE_BUFFER_OVERFLOW) { 2070 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 2071 status = AE_NO_MEMORY; 2072 } else { 2073 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2074 if (ACPI_SUCCESS(status)) 2075 status = acpi_ConvertBufferToInteger(&buf, number); 2076 AcpiOsFree(buf.Pointer); 2077 } 2078 } 2079 return (status); 2080} 2081 2082ACPI_STATUS 2083acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 2084{ 2085 ACPI_OBJECT *p; 2086 UINT8 *val; 2087 int i; 2088 2089 p = (ACPI_OBJECT *)bufp->Pointer; 2090 if (p->Type == ACPI_TYPE_INTEGER) { 2091 *number = p->Integer.Value; 2092 return (AE_OK); 2093 } 2094 if (p->Type != ACPI_TYPE_BUFFER) 2095 return (AE_TYPE); 2096 if (p->Buffer.Length > sizeof(int)) 2097 return (AE_BAD_DATA); 2098 2099 *number = 0; 2100 val = p->Buffer.Pointer; 2101 for (i = 0; i < p->Buffer.Length; i++) 2102 *number += val[i] << (i * 8); 2103 return (AE_OK); 2104} 2105 2106/* 2107 * Iterate over the elements of an a package object, calling the supplied 2108 * function for each element. 2109 * 2110 * XXX possible enhancement might be to abort traversal on error. 2111 */ 2112ACPI_STATUS 2113acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 2114 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 2115{ 2116 ACPI_OBJECT *comp; 2117 int i; 2118 2119 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 2120 return (AE_BAD_PARAMETER); 2121 2122 /* Iterate over components */ 2123 i = 0; 2124 comp = pkg->Package.Elements; 2125 for (; i < pkg->Package.Count; i++, comp++) 2126 func(comp, arg); 2127 2128 return (AE_OK); 2129} 2130 2131/* 2132 * Find the (index)th resource object in a set. 2133 */ 2134ACPI_STATUS 2135acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 2136{ 2137 ACPI_RESOURCE *rp; 2138 int i; 2139 2140 rp = (ACPI_RESOURCE *)buf->Pointer; 2141 i = index; 2142 while (i-- > 0) { 2143 /* Range check */ 2144 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2145 return (AE_BAD_PARAMETER); 2146 2147 /* Check for terminator */ 2148 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2149 return (AE_NOT_FOUND); 2150 rp = ACPI_NEXT_RESOURCE(rp); 2151 } 2152 if (resp != NULL) 2153 *resp = rp; 2154 2155 return (AE_OK); 2156} 2157 2158/* 2159 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 2160 * 2161 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 2162 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 2163 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 2164 * resources. 2165 */ 2166#define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 2167 2168ACPI_STATUS 2169acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 2170{ 2171 ACPI_RESOURCE *rp; 2172 void *newp; 2173 2174 /* Initialise the buffer if necessary. */ 2175 if (buf->Pointer == NULL) { 2176 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 2177 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 2178 return (AE_NO_MEMORY); 2179 rp = (ACPI_RESOURCE *)buf->Pointer; 2180 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2181 rp->Length = 0; 2182 } 2183 if (res == NULL) 2184 return (AE_OK); 2185 2186 /* 2187 * Scan the current buffer looking for the terminator. 2188 * This will either find the terminator or hit the end 2189 * of the buffer and return an error. 2190 */ 2191 rp = (ACPI_RESOURCE *)buf->Pointer; 2192 for (;;) { 2193 /* Range check, don't go outside the buffer */ 2194 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2195 return (AE_BAD_PARAMETER); 2196 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2197 break; 2198 rp = ACPI_NEXT_RESOURCE(rp); 2199 } 2200 2201 /* 2202 * Check the size of the buffer and expand if required. 2203 * 2204 * Required size is: 2205 * size of existing resources before terminator + 2206 * size of new resource and header + 2207 * size of terminator. 2208 * 2209 * Note that this loop should really only run once, unless 2210 * for some reason we are stuffing a *really* huge resource. 2211 */ 2212 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 2213 res->Length + ACPI_RS_SIZE_NO_DATA + 2214 ACPI_RS_SIZE_MIN) >= buf->Length) { 2215 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 2216 return (AE_NO_MEMORY); 2217 bcopy(buf->Pointer, newp, buf->Length); 2218 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 2219 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 2220 AcpiOsFree(buf->Pointer); 2221 buf->Pointer = newp; 2222 buf->Length += buf->Length; 2223 } 2224 2225 /* Insert the new resource. */ 2226 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA); 2227 2228 /* And add the terminator. */ 2229 rp = ACPI_NEXT_RESOURCE(rp); 2230 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2231 rp->Length = 0; 2232 2233 return (AE_OK); 2234} 2235 2236/* 2237 * Set interrupt model. 2238 */ 2239ACPI_STATUS 2240acpi_SetIntrModel(int model) 2241{ 2242 2243 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 2244} 2245 2246/* 2247 * Walk subtables of a table and call a callback routine for each 2248 * subtable. The caller should provide the first subtable and a 2249 * pointer to the end of the table. This can be used to walk tables 2250 * such as MADT and SRAT that use subtable entries. 2251 */ 2252void 2253acpi_walk_subtables(void *first, void *end, acpi_subtable_handler *handler, 2254 void *arg) 2255{ 2256 ACPI_SUBTABLE_HEADER *entry; 2257 2258 for (entry = first; (void *)entry < end; ) { 2259 /* Avoid an infinite loop if we hit a bogus entry. */ 2260 if (entry->Length < sizeof(ACPI_SUBTABLE_HEADER)) 2261 return; 2262 2263 handler(entry, arg); 2264 entry = ACPI_ADD_PTR(ACPI_SUBTABLE_HEADER, entry, entry->Length); 2265 } 2266} 2267 2268/* 2269 * DEPRECATED. This interface has serious deficiencies and will be 2270 * removed. 2271 * 2272 * Immediately enter the sleep state. In the old model, acpiconf(8) ran 2273 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this. 2274 */ 2275ACPI_STATUS 2276acpi_SetSleepState(struct acpi_softc *sc, int state) 2277{ 2278 static int once; 2279 2280 if (!once) { 2281 device_printf(sc->acpi_dev, 2282"warning: acpi_SetSleepState() deprecated, need to update your software\n"); 2283 once = 1; 2284 } 2285 return (acpi_EnterSleepState(sc, state)); 2286} 2287 2288#if defined(__amd64__) || defined(__i386__) 2289static void 2290acpi_sleep_force(void *arg) 2291{ 2292 struct acpi_softc *sc = (struct acpi_softc *)arg; 2293 2294 device_printf(sc->acpi_dev, 2295 "suspend request timed out, forcing sleep now\n"); 2296 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2297 device_printf(sc->acpi_dev, "force sleep state S%d failed\n", 2298 sc->acpi_next_sstate); 2299} 2300#endif 2301 2302/* 2303 * Request that the system enter the given suspend state. All /dev/apm 2304 * devices and devd(8) will be notified. Userland then has a chance to 2305 * save state and acknowledge the request. The system sleeps once all 2306 * acks are in. 2307 */ 2308int 2309acpi_ReqSleepState(struct acpi_softc *sc, int state) 2310{ 2311#if defined(__amd64__) || defined(__i386__) 2312 struct apm_clone_data *clone; 2313 2314 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX) 2315 return (EINVAL); 2316 if (!acpi_sleep_states[state]) 2317 return (EOPNOTSUPP); 2318 2319 /* S5 (soft-off) should be entered directly with no waiting. */ 2320 if (state == ACPI_STATE_S5) { 2321 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, state))) 2322 return (0); 2323 else 2324 return (ENXIO); 2325 } 2326 2327 /* If a suspend request is already in progress, just return. */ 2328 ACPI_LOCK(acpi); 2329 if (sc->acpi_next_sstate != 0) { 2330 ACPI_UNLOCK(acpi); 2331 return (0); 2332 } 2333 2334 /* Record the pending state and notify all apm devices. */ 2335 sc->acpi_next_sstate = state; 2336 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2337 clone->notify_status = APM_EV_NONE; 2338 if ((clone->flags & ACPI_EVF_DEVD) == 0) { 2339 selwakeuppri(&clone->sel_read, PZERO); 2340 KNOTE_UNLOCKED(&clone->sel_read.si_note, 0); 2341 } 2342 } 2343 2344 /* If devd(8) is not running, immediately enter the sleep state. */ 2345 if (!devctl_process_running()) { 2346 ACPI_UNLOCK(acpi); 2347 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) { 2348 return (0); 2349 } else { 2350 return (ENXIO); 2351 } 2352 } 2353 2354 /* 2355 * Set a timeout to fire if userland doesn't ack the suspend request 2356 * in time. This way we still eventually go to sleep if we were 2357 * overheating or running low on battery, even if userland is hung. 2358 * We cancel this timeout once all userland acks are in or the 2359 * suspend request is aborted. 2360 */ 2361 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc); 2362 ACPI_UNLOCK(acpi); 2363 2364 /* Now notify devd(8) also. */ 2365 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state); 2366 2367 return (0); 2368#else 2369 /* This platform does not support acpi suspend/resume. */ 2370 return (EOPNOTSUPP); 2371#endif 2372} 2373 2374/* 2375 * Acknowledge (or reject) a pending sleep state. The caller has 2376 * prepared for suspend and is now ready for it to proceed. If the 2377 * error argument is non-zero, it indicates suspend should be cancelled 2378 * and gives an errno value describing why. Once all votes are in, 2379 * we suspend the system. 2380 */ 2381int 2382acpi_AckSleepState(struct apm_clone_data *clone, int error) 2383{ 2384#if defined(__amd64__) || defined(__i386__) 2385 struct acpi_softc *sc; 2386 int ret, sleeping; 2387 2388 /* If no pending sleep state, return an error. */ 2389 ACPI_LOCK(acpi); 2390 sc = clone->acpi_sc; 2391 if (sc->acpi_next_sstate == 0) { 2392 ACPI_UNLOCK(acpi); 2393 return (ENXIO); 2394 } 2395 2396 /* Caller wants to abort suspend process. */ 2397 if (error) { 2398 sc->acpi_next_sstate = 0; 2399 callout_stop(&sc->susp_force_to); 2400 device_printf(sc->acpi_dev, 2401 "listener on %s cancelled the pending suspend\n", 2402 devtoname(clone->cdev)); 2403 ACPI_UNLOCK(acpi); 2404 return (0); 2405 } 2406 2407 /* 2408 * Mark this device as acking the suspend request. Then, walk through 2409 * all devices, seeing if they agree yet. We only count devices that 2410 * are writable since read-only devices couldn't ack the request. 2411 */ 2412 sleeping = TRUE; 2413 clone->notify_status = APM_EV_ACKED; 2414 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2415 if ((clone->flags & ACPI_EVF_WRITE) != 0 && 2416 clone->notify_status != APM_EV_ACKED) { 2417 sleeping = FALSE; 2418 break; 2419 } 2420 } 2421 2422 /* If all devices have voted "yes", we will suspend now. */ 2423 if (sleeping) 2424 callout_stop(&sc->susp_force_to); 2425 ACPI_UNLOCK(acpi); 2426 ret = 0; 2427 if (sleeping) { 2428 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2429 ret = ENODEV; 2430 } 2431 return (ret); 2432#else 2433 /* This platform does not support acpi suspend/resume. */ 2434 return (EOPNOTSUPP); 2435#endif 2436} 2437 2438static void 2439acpi_sleep_enable(void *arg) 2440{ 2441 struct acpi_softc *sc = (struct acpi_softc *)arg; 2442 2443 /* Reschedule if the system is not fully up and running. */ 2444 if (!AcpiGbl_SystemAwakeAndRunning) { 2445 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); 2446 return; 2447 } 2448 2449 ACPI_LOCK(acpi); 2450 sc->acpi_sleep_disabled = FALSE; 2451 ACPI_UNLOCK(acpi); 2452} 2453 2454static ACPI_STATUS 2455acpi_sleep_disable(struct acpi_softc *sc) 2456{ 2457 ACPI_STATUS status; 2458 2459 /* Fail if the system is not fully up and running. */ 2460 if (!AcpiGbl_SystemAwakeAndRunning) 2461 return (AE_ERROR); 2462 2463 ACPI_LOCK(acpi); 2464 status = sc->acpi_sleep_disabled ? AE_ERROR : AE_OK; 2465 sc->acpi_sleep_disabled = TRUE; 2466 ACPI_UNLOCK(acpi); 2467 2468 return (status); 2469} 2470 2471enum acpi_sleep_state { 2472 ACPI_SS_NONE, 2473 ACPI_SS_GPE_SET, 2474 ACPI_SS_DEV_SUSPEND, 2475 ACPI_SS_SLP_PREP, 2476 ACPI_SS_SLEPT, 2477}; 2478 2479/* 2480 * Enter the desired system sleep state. 2481 * 2482 * Currently we support S1-S5 but S4 is only S4BIOS 2483 */ 2484static ACPI_STATUS 2485acpi_EnterSleepState(struct acpi_softc *sc, int state) 2486{ 2487 ACPI_STATUS status; 2488 enum acpi_sleep_state slp_state; 2489 2490 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2491 2492 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX) 2493 return_ACPI_STATUS (AE_BAD_PARAMETER); 2494 if (!acpi_sleep_states[state]) { 2495 device_printf(sc->acpi_dev, "Sleep state S%d not supported by BIOS\n", 2496 state); 2497 return (AE_SUPPORT); 2498 } 2499 2500 /* Re-entry once we're suspending is not allowed. */ 2501 status = acpi_sleep_disable(sc); 2502 if (ACPI_FAILURE(status)) { 2503 device_printf(sc->acpi_dev, 2504 "suspend request ignored (not ready yet)\n"); 2505 return (status); 2506 } 2507 2508 if (state == ACPI_STATE_S5) { 2509 /* 2510 * Shut down cleanly and power off. This will call us back through the 2511 * shutdown handlers. 2512 */ 2513 shutdown_nice(RB_POWEROFF); 2514 return_ACPI_STATUS (AE_OK); 2515 } 2516 2517#ifdef SMP 2518 thread_lock(curthread); 2519 sched_bind(curthread, 0); 2520 thread_unlock(curthread); 2521#endif 2522 2523 /* 2524 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE 2525 * drivers need this. 2526 */ 2527 mtx_lock(&Giant); 2528 2529 slp_state = ACPI_SS_NONE; 2530 2531 sc->acpi_sstate = state; 2532 2533 /* Enable any GPEs as appropriate and requested by the user. */ 2534 acpi_wake_prep_walk(state); 2535 slp_state = ACPI_SS_GPE_SET; 2536 2537 /* 2538 * Inform all devices that we are going to sleep. If at least one 2539 * device fails, DEVICE_SUSPEND() automatically resumes the tree. 2540 * 2541 * XXX Note that a better two-pass approach with a 'veto' pass 2542 * followed by a "real thing" pass would be better, but the current 2543 * bus interface does not provide for this. 2544 */ 2545 if (DEVICE_SUSPEND(root_bus) != 0) { 2546 device_printf(sc->acpi_dev, "device_suspend failed\n"); 2547 goto backout; 2548 } 2549 slp_state = ACPI_SS_DEV_SUSPEND; 2550 2551 /* If testing device suspend only, back out of everything here. */ 2552 if (acpi_susp_bounce) 2553 goto backout; 2554 2555 status = AcpiEnterSleepStatePrep(state); 2556 if (ACPI_FAILURE(status)) { 2557 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2558 AcpiFormatException(status)); 2559 goto backout; 2560 } 2561 slp_state = ACPI_SS_SLP_PREP; 2562 2563 if (sc->acpi_sleep_delay > 0) 2564 DELAY(sc->acpi_sleep_delay * 1000000); 2565 2566 if (state != ACPI_STATE_S1) { 2567 acpi_sleep_machdep(sc, state); 2568 2569 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 2570 if (state == ACPI_STATE_S4) 2571 AcpiEnable(); 2572 } else { 2573 ACPI_DISABLE_IRQS(); 2574 status = AcpiEnterSleepState(state); 2575 if (ACPI_FAILURE(status)) { 2576 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 2577 AcpiFormatException(status)); 2578 goto backout; 2579 } 2580 } 2581 slp_state = ACPI_SS_SLEPT; 2582 2583 /* 2584 * Back out state according to how far along we got in the suspend 2585 * process. This handles both the error and success cases. 2586 */ 2587backout: 2588 sc->acpi_next_sstate = 0; 2589 if (slp_state >= ACPI_SS_GPE_SET) { 2590 acpi_wake_prep_walk(state); 2591 sc->acpi_sstate = ACPI_STATE_S0; 2592 } 2593 if (slp_state >= ACPI_SS_SLP_PREP) 2594 AcpiLeaveSleepState(state); 2595 if (slp_state >= ACPI_SS_DEV_SUSPEND) 2596 DEVICE_RESUME(root_bus); 2597 if (slp_state >= ACPI_SS_SLEPT) 2598 acpi_enable_fixed_events(sc); 2599 2600 mtx_unlock(&Giant); 2601 2602#ifdef SMP 2603 thread_lock(curthread); 2604 sched_unbind(curthread); 2605 thread_unlock(curthread); 2606#endif 2607 2608 /* Allow another sleep request after a while. */ 2609 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); 2610 2611 /* Run /etc/rc.resume after we are back. */ 2612 if (devctl_process_running()) 2613 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state); 2614 2615 return_ACPI_STATUS (status); 2616} 2617 2618void 2619acpi_resync_clock(struct acpi_softc *sc) 2620{ 2621 2622 if (!acpi_reset_clock) 2623 return; 2624 2625 /* 2626 * Warm up timecounter again and reset system clock. 2627 */ 2628 (void)timecounter->tc_get_timecount(timecounter); 2629 (void)timecounter->tc_get_timecount(timecounter); 2630 inittodr(time_second + sc->acpi_sleep_delay); 2631} 2632 2633/* Initialize a device's wake GPE. */ 2634int 2635acpi_wake_init(device_t dev, int type) 2636{ 2637 struct acpi_prw_data prw; 2638 2639 /* Evaluate _PRW to find the GPE. */ 2640 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 2641 return (ENXIO); 2642 2643 /* Set the requested type for the GPE (runtime, wake, or both). */ 2644 if (ACPI_FAILURE(AcpiSetGpeType(prw.gpe_handle, prw.gpe_bit, type))) { 2645 device_printf(dev, "set GPE type failed\n"); 2646 return (ENXIO); 2647 } 2648 2649 return (0); 2650} 2651 2652/* Enable or disable the device's wake GPE. */ 2653int 2654acpi_wake_set_enable(device_t dev, int enable) 2655{ 2656 struct acpi_prw_data prw; 2657 ACPI_STATUS status; 2658 int flags; 2659 2660 /* Make sure the device supports waking the system and get the GPE. */ 2661 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 2662 return (ENXIO); 2663 2664 flags = acpi_get_flags(dev); 2665 if (enable) { 2666 status = AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2667 if (ACPI_FAILURE(status)) { 2668 device_printf(dev, "enable wake failed\n"); 2669 return (ENXIO); 2670 } 2671 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); 2672 } else { 2673 status = AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2674 if (ACPI_FAILURE(status)) { 2675 device_printf(dev, "disable wake failed\n"); 2676 return (ENXIO); 2677 } 2678 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); 2679 } 2680 2681 return (0); 2682} 2683 2684static int 2685acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate) 2686{ 2687 struct acpi_prw_data prw; 2688 device_t dev; 2689 2690 /* Check that this is a wake-capable device and get its GPE. */ 2691 if (acpi_parse_prw(handle, &prw) != 0) 2692 return (ENXIO); 2693 dev = acpi_get_device(handle); 2694 2695 /* 2696 * The destination sleep state must be less than (i.e., higher power) 2697 * or equal to the value specified by _PRW. If this GPE cannot be 2698 * enabled for the next sleep state, then disable it. If it can and 2699 * the user requested it be enabled, turn on any required power resources 2700 * and set _PSW. 2701 */ 2702 if (sstate > prw.lowest_wake) { 2703 AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2704 if (bootverbose) 2705 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n", 2706 acpi_name(handle), sstate); 2707 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) { 2708 acpi_pwr_wake_enable(handle, 1); 2709 acpi_SetInteger(handle, "_PSW", 1); 2710 if (bootverbose) 2711 device_printf(dev, "wake_prep enabled for %s (S%d)\n", 2712 acpi_name(handle), sstate); 2713 } 2714 2715 return (0); 2716} 2717 2718static int 2719acpi_wake_run_prep(ACPI_HANDLE handle, int sstate) 2720{ 2721 struct acpi_prw_data prw; 2722 device_t dev; 2723 2724 /* 2725 * Check that this is a wake-capable device and get its GPE. Return 2726 * now if the user didn't enable this device for wake. 2727 */ 2728 if (acpi_parse_prw(handle, &prw) != 0) 2729 return (ENXIO); 2730 dev = acpi_get_device(handle); 2731 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0) 2732 return (0); 2733 2734 /* 2735 * If this GPE couldn't be enabled for the previous sleep state, it was 2736 * disabled before going to sleep so re-enable it. If it was enabled, 2737 * clear _PSW and turn off any power resources it used. 2738 */ 2739 if (sstate > prw.lowest_wake) { 2740 AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2741 if (bootverbose) 2742 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle)); 2743 } else { 2744 acpi_SetInteger(handle, "_PSW", 0); 2745 acpi_pwr_wake_enable(handle, 0); 2746 if (bootverbose) 2747 device_printf(dev, "run_prep cleaned up for %s\n", 2748 acpi_name(handle)); 2749 } 2750 2751 return (0); 2752} 2753 2754static ACPI_STATUS 2755acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 2756{ 2757 int sstate; 2758 2759 /* If suspending, run the sleep prep function, otherwise wake. */ 2760 sstate = *(int *)context; 2761 if (AcpiGbl_SystemAwakeAndRunning) 2762 acpi_wake_sleep_prep(handle, sstate); 2763 else 2764 acpi_wake_run_prep(handle, sstate); 2765 return (AE_OK); 2766} 2767 2768/* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */ 2769static int 2770acpi_wake_prep_walk(int sstate) 2771{ 2772 ACPI_HANDLE sb_handle; 2773 2774 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) 2775 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100, 2776 acpi_wake_prep, &sstate, NULL); 2777 return (0); 2778} 2779 2780/* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */ 2781static int 2782acpi_wake_sysctl_walk(device_t dev) 2783{ 2784 int error, i, numdevs; 2785 device_t *devlist; 2786 device_t child; 2787 ACPI_STATUS status; 2788 2789 error = device_get_children(dev, &devlist, &numdevs); 2790 if (error != 0 || numdevs == 0) { 2791 if (numdevs == 0) 2792 free(devlist, M_TEMP); 2793 return (error); 2794 } 2795 for (i = 0; i < numdevs; i++) { 2796 child = devlist[i]; 2797 acpi_wake_sysctl_walk(child); 2798 if (!device_is_attached(child)) 2799 continue; 2800 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL); 2801 if (ACPI_SUCCESS(status)) { 2802 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child), 2803 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO, 2804 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0, 2805 acpi_wake_set_sysctl, "I", "Device set to wake the system"); 2806 } 2807 } 2808 free(devlist, M_TEMP); 2809 2810 return (0); 2811} 2812 2813/* Enable or disable wake from userland. */ 2814static int 2815acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS) 2816{ 2817 int enable, error; 2818 device_t dev; 2819 2820 dev = (device_t)arg1; 2821 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0; 2822 2823 error = sysctl_handle_int(oidp, &enable, 0, req); 2824 if (error != 0 || req->newptr == NULL) 2825 return (error); 2826 if (enable != 0 && enable != 1) 2827 return (EINVAL); 2828 2829 return (acpi_wake_set_enable(dev, enable)); 2830} 2831 2832/* Parse a device's _PRW into a structure. */ 2833int 2834acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) 2835{ 2836 ACPI_STATUS status; 2837 ACPI_BUFFER prw_buffer; 2838 ACPI_OBJECT *res, *res2; 2839 int error, i, power_count; 2840 2841 if (h == NULL || prw == NULL) 2842 return (EINVAL); 2843 2844 /* 2845 * The _PRW object (7.2.9) is only required for devices that have the 2846 * ability to wake the system from a sleeping state. 2847 */ 2848 error = EINVAL; 2849 prw_buffer.Pointer = NULL; 2850 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 2851 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 2852 if (ACPI_FAILURE(status)) 2853 return (ENOENT); 2854 res = (ACPI_OBJECT *)prw_buffer.Pointer; 2855 if (res == NULL) 2856 return (ENOENT); 2857 if (!ACPI_PKG_VALID(res, 2)) 2858 goto out; 2859 2860 /* 2861 * Element 1 of the _PRW object: 2862 * The lowest power system sleeping state that can be entered while still 2863 * providing wake functionality. The sleeping state being entered must 2864 * be less than (i.e., higher power) or equal to this value. 2865 */ 2866 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) 2867 goto out; 2868 2869 /* 2870 * Element 0 of the _PRW object: 2871 */ 2872 switch (res->Package.Elements[0].Type) { 2873 case ACPI_TYPE_INTEGER: 2874 /* 2875 * If the data type of this package element is numeric, then this 2876 * _PRW package element is the bit index in the GPEx_EN, in the 2877 * GPE blocks described in the FADT, of the enable bit that is 2878 * enabled for the wake event. 2879 */ 2880 prw->gpe_handle = NULL; 2881 prw->gpe_bit = res->Package.Elements[0].Integer.Value; 2882 error = 0; 2883 break; 2884 case ACPI_TYPE_PACKAGE: 2885 /* 2886 * If the data type of this package element is a package, then this 2887 * _PRW package element is itself a package containing two 2888 * elements. The first is an object reference to the GPE Block 2889 * device that contains the GPE that will be triggered by the wake 2890 * event. The second element is numeric and it contains the bit 2891 * index in the GPEx_EN, in the GPE Block referenced by the 2892 * first element in the package, of the enable bit that is enabled for 2893 * the wake event. 2894 * 2895 * For example, if this field is a package then it is of the form: 2896 * Package() {\_SB.PCI0.ISA.GPE, 2} 2897 */ 2898 res2 = &res->Package.Elements[0]; 2899 if (!ACPI_PKG_VALID(res2, 2)) 2900 goto out; 2901 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 2902 if (prw->gpe_handle == NULL) 2903 goto out; 2904 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) 2905 goto out; 2906 error = 0; 2907 break; 2908 default: 2909 goto out; 2910 } 2911 2912 /* Elements 2 to N of the _PRW object are power resources. */ 2913 power_count = res->Package.Count - 2; 2914 if (power_count > ACPI_PRW_MAX_POWERRES) { 2915 printf("ACPI device %s has too many power resources\n", acpi_name(h)); 2916 power_count = 0; 2917 } 2918 prw->power_res_count = power_count; 2919 for (i = 0; i < power_count; i++) 2920 prw->power_res[i] = res->Package.Elements[i]; 2921 2922out: 2923 if (prw_buffer.Pointer != NULL) 2924 AcpiOsFree(prw_buffer.Pointer); 2925 return (error); 2926} 2927 2928/* 2929 * ACPI Event Handlers 2930 */ 2931 2932/* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 2933 2934static void 2935acpi_system_eventhandler_sleep(void *arg, int state) 2936{ 2937 struct acpi_softc *sc = (struct acpi_softc *)arg; 2938 int ret; 2939 2940 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2941 2942 /* Check if button action is disabled or unknown. */ 2943 if (state == ACPI_STATE_UNKNOWN) 2944 return; 2945 2946 /* Request that the system prepare to enter the given suspend state. */ 2947 ret = acpi_ReqSleepState(sc, state); 2948 if (ret != 0) 2949 device_printf(sc->acpi_dev, 2950 "request to enter state S%d failed (err %d)\n", state, ret); 2951 2952 return_VOID; 2953} 2954 2955static void 2956acpi_system_eventhandler_wakeup(void *arg, int state) 2957{ 2958 2959 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2960 2961 /* Currently, nothing to do for wakeup. */ 2962 2963 return_VOID; 2964} 2965 2966/* 2967 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 2968 */ 2969UINT32 2970acpi_event_power_button_sleep(void *context) 2971{ 2972 struct acpi_softc *sc = (struct acpi_softc *)context; 2973 2974 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2975 2976 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 2977 2978 return_VALUE (ACPI_INTERRUPT_HANDLED); 2979} 2980 2981UINT32 2982acpi_event_power_button_wake(void *context) 2983{ 2984 struct acpi_softc *sc = (struct acpi_softc *)context; 2985 2986 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2987 2988 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 2989 2990 return_VALUE (ACPI_INTERRUPT_HANDLED); 2991} 2992 2993UINT32 2994acpi_event_sleep_button_sleep(void *context) 2995{ 2996 struct acpi_softc *sc = (struct acpi_softc *)context; 2997 2998 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2999 3000 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 3001 3002 return_VALUE (ACPI_INTERRUPT_HANDLED); 3003} 3004 3005UINT32 3006acpi_event_sleep_button_wake(void *context) 3007{ 3008 struct acpi_softc *sc = (struct acpi_softc *)context; 3009 3010 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3011 3012 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 3013 3014 return_VALUE (ACPI_INTERRUPT_HANDLED); 3015} 3016 3017/* 3018 * XXX This static buffer is suboptimal. There is no locking so only 3019 * use this for single-threaded callers. 3020 */ 3021char * 3022acpi_name(ACPI_HANDLE handle) 3023{ 3024 ACPI_BUFFER buf; 3025 static char data[256]; 3026 3027 buf.Length = sizeof(data); 3028 buf.Pointer = data; 3029 3030 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf))) 3031 return (data); 3032 return ("(unknown)"); 3033} 3034 3035/* 3036 * Debugging/bug-avoidance. Avoid trying to fetch info on various 3037 * parts of the namespace. 3038 */ 3039int 3040acpi_avoid(ACPI_HANDLE handle) 3041{ 3042 char *cp, *env, *np; 3043 int len; 3044 3045 np = acpi_name(handle); 3046 if (*np == '\\') 3047 np++; 3048 if ((env = getenv("debug.acpi.avoid")) == NULL) 3049 return (0); 3050 3051 /* Scan the avoid list checking for a match */ 3052 cp = env; 3053 for (;;) { 3054 while (*cp != 0 && isspace(*cp)) 3055 cp++; 3056 if (*cp == 0) 3057 break; 3058 len = 0; 3059 while (cp[len] != 0 && !isspace(cp[len])) 3060 len++; 3061 if (!strncmp(cp, np, len)) { 3062 freeenv(env); 3063 return(1); 3064 } 3065 cp += len; 3066 } 3067 freeenv(env); 3068 3069 return (0); 3070} 3071 3072/* 3073 * Debugging/bug-avoidance. Disable ACPI subsystem components. 3074 */ 3075int 3076acpi_disabled(char *subsys) 3077{ 3078 char *cp, *env; 3079 int len; 3080 3081 if ((env = getenv("debug.acpi.disabled")) == NULL) 3082 return (0); 3083 if (strcmp(env, "all") == 0) { 3084 freeenv(env); 3085 return (1); 3086 } 3087 3088 /* Scan the disable list, checking for a match. */ 3089 cp = env; 3090 for (;;) { 3091 while (*cp != '\0' && isspace(*cp)) 3092 cp++; 3093 if (*cp == '\0') 3094 break; 3095 len = 0; 3096 while (cp[len] != '\0' && !isspace(cp[len])) 3097 len++; 3098 if (strncmp(cp, subsys, len) == 0) { 3099 freeenv(env); 3100 return (1); 3101 } 3102 cp += len; 3103 } 3104 freeenv(env); 3105 3106 return (0); 3107} 3108 3109/* 3110 * Control interface. 3111 * 3112 * We multiplex ioctls for all participating ACPI devices here. Individual 3113 * drivers wanting to be accessible via /dev/acpi should use the 3114 * register/deregister interface to make their handlers visible. 3115 */ 3116struct acpi_ioctl_hook 3117{ 3118 TAILQ_ENTRY(acpi_ioctl_hook) link; 3119 u_long cmd; 3120 acpi_ioctl_fn fn; 3121 void *arg; 3122}; 3123 3124static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 3125static int acpi_ioctl_hooks_initted; 3126 3127int 3128acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 3129{ 3130 struct acpi_ioctl_hook *hp; 3131 3132 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 3133 return (ENOMEM); 3134 hp->cmd = cmd; 3135 hp->fn = fn; 3136 hp->arg = arg; 3137 3138 ACPI_LOCK(acpi); 3139 if (acpi_ioctl_hooks_initted == 0) { 3140 TAILQ_INIT(&acpi_ioctl_hooks); 3141 acpi_ioctl_hooks_initted = 1; 3142 } 3143 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 3144 ACPI_UNLOCK(acpi); 3145 3146 return (0); 3147} 3148 3149void 3150acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 3151{ 3152 struct acpi_ioctl_hook *hp; 3153 3154 ACPI_LOCK(acpi); 3155 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 3156 if (hp->cmd == cmd && hp->fn == fn) 3157 break; 3158 3159 if (hp != NULL) { 3160 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 3161 free(hp, M_ACPIDEV); 3162 } 3163 ACPI_UNLOCK(acpi); 3164} 3165 3166static int 3167acpiopen(struct cdev *dev, int flag, int fmt, struct thread *td) 3168{ 3169 return (0); 3170} 3171 3172static int 3173acpiclose(struct cdev *dev, int flag, int fmt, struct thread *td) 3174{ 3175 return (0); 3176} 3177 3178static int 3179acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 3180{ 3181 struct acpi_softc *sc; 3182 struct acpi_ioctl_hook *hp; 3183 int error, state; 3184 3185 error = 0; 3186 hp = NULL; 3187 sc = dev->si_drv1; 3188 3189 /* 3190 * Scan the list of registered ioctls, looking for handlers. 3191 */ 3192 ACPI_LOCK(acpi); 3193 if (acpi_ioctl_hooks_initted) 3194 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 3195 if (hp->cmd == cmd) 3196 break; 3197 } 3198 ACPI_UNLOCK(acpi); 3199 if (hp) 3200 return (hp->fn(cmd, addr, hp->arg)); 3201 3202 /* 3203 * Core ioctls are not permitted for non-writable user. 3204 * Currently, other ioctls just fetch information. 3205 * Not changing system behavior. 3206 */ 3207 if ((flag & FWRITE) == 0) 3208 return (EPERM); 3209 3210 /* Core system ioctls. */ 3211 switch (cmd) { 3212 case ACPIIO_REQSLPSTATE: 3213 state = *(int *)addr; 3214 if (state != ACPI_STATE_S5) 3215 return (acpi_ReqSleepState(sc, state)); 3216 device_printf(sc->acpi_dev, "power off via acpi ioctl not supported\n"); 3217 error = EOPNOTSUPP; 3218 break; 3219 case ACPIIO_ACKSLPSTATE: 3220 error = *(int *)addr; 3221 error = acpi_AckSleepState(sc->acpi_clone, error); 3222 break; 3223 case ACPIIO_SETSLPSTATE: /* DEPRECATED */ 3224 state = *(int *)addr; 3225 if (state < ACPI_STATE_S0 || state > ACPI_S_STATES_MAX) 3226 return (EINVAL); 3227 if (!acpi_sleep_states[state]) 3228 return (EOPNOTSUPP); 3229 if (ACPI_FAILURE(acpi_SetSleepState(sc, state))) 3230 error = ENXIO; 3231 break; 3232 default: 3233 error = ENXIO; 3234 break; 3235 } 3236 3237 return (error); 3238} 3239 3240static int 3241acpi_sname2sstate(const char *sname) 3242{ 3243 int sstate; 3244 3245 if (toupper(sname[0]) == 'S') { 3246 sstate = sname[1] - '0'; 3247 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5 && 3248 sname[2] == '\0') 3249 return (sstate); 3250 } else if (strcasecmp(sname, "NONE") == 0) 3251 return (ACPI_STATE_UNKNOWN); 3252 return (-1); 3253} 3254 3255static const char * 3256acpi_sstate2sname(int sstate) 3257{ 3258 static const char *snames[] = { "S0", "S1", "S2", "S3", "S4", "S5" }; 3259 3260 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5) 3261 return (snames[sstate]); 3262 else if (sstate == ACPI_STATE_UNKNOWN) 3263 return ("NONE"); 3264 return (NULL); 3265} 3266 3267static int 3268acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3269{ 3270 int error; 3271 struct sbuf sb; 3272 UINT8 state; 3273 3274 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND); 3275 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++) 3276 if (acpi_sleep_states[state]) 3277 sbuf_printf(&sb, "%s ", acpi_sstate2sname(state)); 3278 sbuf_trim(&sb); 3279 sbuf_finish(&sb); 3280 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 3281 sbuf_delete(&sb); 3282 return (error); 3283} 3284 3285static int 3286acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3287{ 3288 char sleep_state[10]; 3289 int error, new_state, old_state; 3290 3291 old_state = *(int *)oidp->oid_arg1; 3292 strlcpy(sleep_state, acpi_sstate2sname(old_state), sizeof(sleep_state)); 3293 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 3294 if (error == 0 && req->newptr != NULL) { 3295 new_state = acpi_sname2sstate(sleep_state); 3296 if (new_state < ACPI_STATE_S1) 3297 return (EINVAL); 3298 if (new_state < ACPI_S_STATE_COUNT && !acpi_sleep_states[new_state]) 3299 return (EOPNOTSUPP); 3300 if (new_state != old_state) 3301 *(int *)oidp->oid_arg1 = new_state; 3302 } 3303 return (error); 3304} 3305 3306/* Inform devctl(4) when we receive a Notify. */ 3307void 3308acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 3309{ 3310 char notify_buf[16]; 3311 ACPI_BUFFER handle_buf; 3312 ACPI_STATUS status; 3313 3314 if (subsystem == NULL) 3315 return; 3316 3317 handle_buf.Pointer = NULL; 3318 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 3319 status = AcpiNsHandleToPathname(h, &handle_buf); 3320 if (ACPI_FAILURE(status)) 3321 return; 3322 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 3323 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 3324 AcpiOsFree(handle_buf.Pointer); 3325} 3326 3327#ifdef ACPI_DEBUG 3328/* 3329 * Support for parsing debug options from the kernel environment. 3330 * 3331 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 3332 * by specifying the names of the bits in the debug.acpi.layer and 3333 * debug.acpi.level environment variables. Bits may be unset by 3334 * prefixing the bit name with !. 3335 */ 3336struct debugtag 3337{ 3338 char *name; 3339 UINT32 value; 3340}; 3341 3342static struct debugtag dbg_layer[] = { 3343 {"ACPI_UTILITIES", ACPI_UTILITIES}, 3344 {"ACPI_HARDWARE", ACPI_HARDWARE}, 3345 {"ACPI_EVENTS", ACPI_EVENTS}, 3346 {"ACPI_TABLES", ACPI_TABLES}, 3347 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 3348 {"ACPI_PARSER", ACPI_PARSER}, 3349 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 3350 {"ACPI_EXECUTER", ACPI_EXECUTER}, 3351 {"ACPI_RESOURCES", ACPI_RESOURCES}, 3352 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 3353 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 3354 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 3355 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 3356 3357 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 3358 {"ACPI_BATTERY", ACPI_BATTERY}, 3359 {"ACPI_BUS", ACPI_BUS}, 3360 {"ACPI_BUTTON", ACPI_BUTTON}, 3361 {"ACPI_EC", ACPI_EC}, 3362 {"ACPI_FAN", ACPI_FAN}, 3363 {"ACPI_POWERRES", ACPI_POWERRES}, 3364 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 3365 {"ACPI_THERMAL", ACPI_THERMAL}, 3366 {"ACPI_TIMER", ACPI_TIMER}, 3367 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 3368 {NULL, 0} 3369}; 3370 3371static struct debugtag dbg_level[] = { 3372 {"ACPI_LV_INIT", ACPI_LV_INIT}, 3373 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 3374 {"ACPI_LV_INFO", ACPI_LV_INFO}, 3375 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 3376 3377 /* Trace verbosity level 1 [Standard Trace Level] */ 3378 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 3379 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 3380 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 3381 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 3382 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 3383 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 3384 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 3385 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 3386 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 3387 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 3388 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 3389 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 3390 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 3391 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 3392 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 3393 3394 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 3395 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 3396 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 3397 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 3398 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 3399 {"ACPI_LV_ALL", ACPI_LV_ALL}, 3400 3401 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 3402 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 3403 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 3404 {"ACPI_LV_IO", ACPI_LV_IO}, 3405 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 3406 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 3407 3408 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 3409 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 3410 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 3411 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 3412 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 3413 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 3414 {NULL, 0} 3415}; 3416 3417static void 3418acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 3419{ 3420 char *ep; 3421 int i, l; 3422 int set; 3423 3424 while (*cp) { 3425 if (isspace(*cp)) { 3426 cp++; 3427 continue; 3428 } 3429 ep = cp; 3430 while (*ep && !isspace(*ep)) 3431 ep++; 3432 if (*cp == '!') { 3433 set = 0; 3434 cp++; 3435 if (cp == ep) 3436 continue; 3437 } else { 3438 set = 1; 3439 } 3440 l = ep - cp; 3441 for (i = 0; tag[i].name != NULL; i++) { 3442 if (!strncmp(cp, tag[i].name, l)) { 3443 if (set) 3444 *flag |= tag[i].value; 3445 else 3446 *flag &= ~tag[i].value; 3447 } 3448 } 3449 cp = ep; 3450 } 3451} 3452 3453static void 3454acpi_set_debugging(void *junk) 3455{ 3456 char *layer, *level; 3457 3458 if (cold) { 3459 AcpiDbgLayer = 0; 3460 AcpiDbgLevel = 0; 3461 } 3462 3463 layer = getenv("debug.acpi.layer"); 3464 level = getenv("debug.acpi.level"); 3465 if (layer == NULL && level == NULL) 3466 return; 3467 3468 printf("ACPI set debug"); 3469 if (layer != NULL) { 3470 if (strcmp("NONE", layer) != 0) 3471 printf(" layer '%s'", layer); 3472 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer); 3473 freeenv(layer); 3474 } 3475 if (level != NULL) { 3476 if (strcmp("NONE", level) != 0) 3477 printf(" level '%s'", level); 3478 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel); 3479 freeenv(level); 3480 } 3481 printf("\n"); 3482} 3483 3484SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 3485 NULL); 3486 3487static int 3488acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 3489{ 3490 int error, *dbg; 3491 struct debugtag *tag; 3492 struct sbuf sb; 3493 3494 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 3495 return (ENOMEM); 3496 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 3497 tag = &dbg_layer[0]; 3498 dbg = &AcpiDbgLayer; 3499 } else { 3500 tag = &dbg_level[0]; 3501 dbg = &AcpiDbgLevel; 3502 } 3503 3504 /* Get old values if this is a get request. */ 3505 ACPI_SERIAL_BEGIN(acpi); 3506 if (*dbg == 0) { 3507 sbuf_cpy(&sb, "NONE"); 3508 } else if (req->newptr == NULL) { 3509 for (; tag->name != NULL; tag++) { 3510 if ((*dbg & tag->value) == tag->value) 3511 sbuf_printf(&sb, "%s ", tag->name); 3512 } 3513 } 3514 sbuf_trim(&sb); 3515 sbuf_finish(&sb); 3516 3517 /* Copy out the old values to the user. */ 3518 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb)); 3519 sbuf_delete(&sb); 3520 3521 /* If the user is setting a string, parse it. */ 3522 if (error == 0 && req->newptr != NULL) { 3523 *dbg = 0; 3524 setenv((char *)oidp->oid_arg1, (char *)req->newptr); 3525 acpi_set_debugging(NULL); 3526 } 3527 ACPI_SERIAL_END(acpi); 3528 3529 return (error); 3530} 3531 3532SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 3533 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 3534SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 3535 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 3536#endif /* ACPI_DEBUG */ 3537 3538static int 3539acpi_pm_func(u_long cmd, void *arg, ...) 3540{ 3541 int state, acpi_state; 3542 int error; 3543 struct acpi_softc *sc; 3544 va_list ap; 3545 3546 error = 0; 3547 switch (cmd) { 3548 case POWER_CMD_SUSPEND: 3549 sc = (struct acpi_softc *)arg; 3550 if (sc == NULL) { 3551 error = EINVAL; 3552 goto out; 3553 } 3554 3555 va_start(ap, arg); 3556 state = va_arg(ap, int); 3557 va_end(ap); 3558 3559 switch (state) { 3560 case POWER_SLEEP_STATE_STANDBY: 3561 acpi_state = sc->acpi_standby_sx; 3562 break; 3563 case POWER_SLEEP_STATE_SUSPEND: 3564 acpi_state = sc->acpi_suspend_sx; 3565 break; 3566 case POWER_SLEEP_STATE_HIBERNATE: 3567 acpi_state = ACPI_STATE_S4; 3568 break; 3569 default: 3570 error = EINVAL; 3571 goto out; 3572 } 3573 3574 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state))) 3575 error = ENXIO; 3576 break; 3577 default: 3578 error = EINVAL; 3579 goto out; 3580 } 3581 3582out: 3583 return (error); 3584} 3585 3586static void 3587acpi_pm_register(void *arg) 3588{ 3589 if (!cold || resource_disabled("acpi", 0)) 3590 return; 3591 3592 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 3593} 3594 3595SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 3596