2 * Copyright (c) 2000 Takanori Watanabe <takawata@jp.kfreebsd.org>
3 * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.kfreebsd.org>
4 * Copyright (c) 2000, 2001 Michael Smith
5 * Copyright (c) 2000 BSDi
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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
29 * $FreeBSD: src/sys/dev/acpica/acpi.c,v 1.243.2.4.4.1 2009/04/15 03:14:26 kensmith Exp $
33 #include <sys/param.h>
34 #include <sys/kernel.h>
36 #include <sys/fcntl.h>
37 #include <sys/malloc.h>
38 #include <sys/module.h>
41 #include <sys/ioccom.h>
42 #include <sys/reboot.h>
43 #include <sys/sysctl.h>
44 #include <sys/ctype.h>
45 #include <sys/linker.h>
46 #include <sys/power.h>
48 #include <sys/device.h>
49 #include <sys/spinlock.h>
50 #include <sys/spinlock2.h>
53 #include <bus/isa/isavar.h>
54 #include <bus/isa/pnpvar.h>
57 #include <dev/acpica5/acpivar.h>
58 #include <dev/acpica5/acpiio.h>
64 #include <bus/pci/pci_cfgreg.h>
65 #include <bus/pci/pcivar.h>
66 #include <bus/pci/pci_private.h>
68 #include <vm/vm_param.h>
70 MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices");
72 #define GIANT_REQUIRED
75 /* Hooks for the ACPI CA debugging infrastructure */
76 #define _COMPONENT ACPI_BUS
77 ACPI_MODULE_NAME("ACPI")
79 static d_open_t acpiopen;
80 static d_close_t acpiclose;
81 static d_ioctl_t acpiioctl;
83 static struct dev_ops acpi_ops = {
90 /* Global mutex for locking access to the ACPI subsystem. */
91 struct lock acpi_lock;
92 /* Bitmap of device quirks. */
95 static int acpi_modevent(struct module *mod, int event, void *junk);
96 static void acpi_identify(driver_t *driver, device_t parent);
97 static int acpi_probe(device_t dev);
98 static int acpi_attach(device_t dev);
99 static int acpi_suspend(device_t dev);
100 static int acpi_resume(device_t dev);
101 static int acpi_shutdown(device_t dev);
102 static device_t acpi_add_child(device_t bus, device_t parent, int order, const char *name,
104 static int acpi_print_child(device_t bus, device_t child);
105 static void acpi_probe_nomatch(device_t bus, device_t child);
106 static void acpi_driver_added(device_t dev, driver_t *driver);
107 static int acpi_read_ivar(device_t dev, device_t child, int index,
109 static int acpi_write_ivar(device_t dev, device_t child, int index,
111 static struct resource_list *acpi_get_rlist(device_t dev, device_t child);
112 static int acpi_sysres_alloc(device_t dev);
113 static struct resource *acpi_alloc_resource(device_t bus, device_t child,
114 int type, int *rid, u_long start, u_long end,
115 u_long count, u_int flags);
116 static int acpi_release_resource(device_t bus, device_t child, int type,
117 int rid, struct resource *r);
118 static void acpi_delete_resource(device_t bus, device_t child, int type,
120 static uint32_t acpi_isa_get_logicalid(device_t dev);
121 static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count);
122 static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids);
123 static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev,
124 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters,
126 static int acpi_device_pwr_for_sleep(device_t bus, device_t dev,
128 static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level,
129 void *context, void **retval);
130 static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev,
131 int max_depth, acpi_scan_cb_t user_fn, void *arg);
132 static int acpi_set_powerstate_method(device_t bus, device_t child,
134 static int acpi_isa_pnp_probe(device_t bus, device_t child,
135 struct isa_pnp_id *ids);
136 static void acpi_probe_children(device_t bus);
137 static void acpi_probe_order(ACPI_HANDLE handle, int *order);
138 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level,
139 void *context, void **status);
140 static ACPI_STATUS acpi_EnterSleepState(struct acpi_softc *sc, int state);
141 static void acpi_shutdown_final(void *arg, int howto);
142 static void acpi_enable_fixed_events(struct acpi_softc *sc);
143 static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate);
144 static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate);
145 static int acpi_wake_prep_walk(int sstate);
146 static int acpi_wake_sysctl_walk(device_t dev);
148 static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS);
150 static void acpi_system_eventhandler_sleep(void *arg, int state);
151 static void acpi_system_eventhandler_wakeup(void *arg, int state);
152 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS);
153 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS);
154 static int acpi_pm_func(u_long cmd, void *arg, ...);
155 static int acpi_child_location_str_method(device_t acdev, device_t child,
156 char *buf, size_t buflen);
157 static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child,
158 char *buf, size_t buflen);
159 static void acpi_enable_pcie(void);
161 static device_method_t acpi_methods[] = {
162 /* Device interface */
163 DEVMETHOD(device_identify, acpi_identify),
164 DEVMETHOD(device_probe, acpi_probe),
165 DEVMETHOD(device_attach, acpi_attach),
166 DEVMETHOD(device_shutdown, acpi_shutdown),
167 DEVMETHOD(device_detach, bus_generic_detach),
168 DEVMETHOD(device_suspend, acpi_suspend),
169 DEVMETHOD(device_resume, acpi_resume),
172 DEVMETHOD(bus_add_child, acpi_add_child),
173 DEVMETHOD(bus_print_child, acpi_print_child),
174 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch),
175 DEVMETHOD(bus_driver_added, acpi_driver_added),
176 DEVMETHOD(bus_read_ivar, acpi_read_ivar),
177 DEVMETHOD(bus_write_ivar, acpi_write_ivar),
178 DEVMETHOD(bus_get_resource_list, acpi_get_rlist),
179 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource),
180 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
181 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource),
182 DEVMETHOD(bus_release_resource, acpi_release_resource),
183 DEVMETHOD(bus_delete_resource, acpi_delete_resource),
184 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method),
185 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method),
186 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
187 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
188 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
189 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
192 DEVMETHOD(acpi_id_probe, acpi_device_id_probe),
193 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj),
194 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep),
195 DEVMETHOD(acpi_scan_children, acpi_device_scan_children),
198 DEVMETHOD(pci_set_powerstate, acpi_set_powerstate_method),
201 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe),
206 static driver_t acpi_driver = {
209 sizeof(struct acpi_softc),
212 static devclass_t acpi_devclass;
213 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0);
214 MODULE_VERSION(acpi, 1);
216 ACPI_SERIAL_DECL(acpi, "ACPI serializer")
218 /* Local pools for managing system resources for ACPI child devices. */
219 static struct rman acpi_rman_io, acpi_rman_mem;
221 #define ACPI_MINIMUM_AWAKETIME 5
223 static const char* sleep_state_names[] = {
224 "S0", "S1", "S2", "S3", "S4", "S5", "NONE"};
226 SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging");
227 static char acpi_ca_version[12];
228 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD,
229 acpi_ca_version, 0, "Version of Intel ACPI-CA");
232 * Allow override of whether methods execute in parallel or not.
233 * Enable this for serial behavior, which fixes "AE_ALREADY_EXISTS"
234 * errors for AML that really can't handle parallel method execution.
235 * It is off by default since this breaks recursive methods and
236 * some IBMs use such code.
238 static int acpi_serialize_methods;
239 TUNABLE_INT("hw.acpi.serialize_methods", &acpi_serialize_methods);
241 /* Power devices off and on in suspend and resume. XXX Remove once tested. */
242 static int acpi_do_powerstate = 1;
243 TUNABLE_INT("debug.acpi.do_powerstate", &acpi_do_powerstate);
244 SYSCTL_INT(_debug_acpi, OID_AUTO, do_powerstate, CTLFLAG_RW,
245 &acpi_do_powerstate, 1, "Turn off devices when suspending.");
247 /* Allow users to override quirks. */
248 TUNABLE_INT("debug.acpi.quirks", &acpi_quirks);
250 static int acpi_susp_bounce;
251 SYSCTL_INT(_debug_acpi, OID_AUTO, suspend_bounce, CTLFLAG_RW,
252 &acpi_susp_bounce, 0, "Don't actually suspend, just test devices.");
255 * ACPI can only be loaded as a module by the loader; activating it after
256 * system bootstrap time is not useful, and can be fatal to the system.
257 * It also cannot be unloaded, since the entire system bus heirarchy hangs
261 acpi_modevent(struct module *mod, int event, void *junk)
266 kprintf("The ACPI driver cannot be loaded after boot.\n");
271 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI)
281 * Perform early initialization.
286 static int started = 0;
290 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
292 /* Only run the startup code once. The MADT driver also calls this. */
294 return_VALUE (AE_OK);
298 * Pre-allocate space for RSDT/XSDT and DSDT tables and allow resizing
299 * if more tables exist.
301 if (ACPI_FAILURE(status = AcpiInitializeTables(NULL, 2, TRUE))) {
302 kprintf("ACPI: Table initialisation failed: %s\n",
303 AcpiFormatException(status));
304 return_VALUE (status);
307 /* Set up any quirks we have for this system. */
309 if (acpi_quirks == ACPI_Q_OK)
310 acpi_table_quirks(&acpi_quirks);
313 /* If the user manually set the disabled hint to 0, force-enable ACPI. */
314 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0)
315 acpi_quirks &= ~ACPI_Q_BROKEN;
316 if (acpi_quirks & ACPI_Q_BROKEN) {
317 kprintf("ACPI disabled by blacklist. Contact your BIOS vendor.\n");
321 return_VALUE (status);
325 * Detect ACPI, perform early initialisation
328 acpi_identify(driver_t *driver, device_t parent)
332 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
337 /* Check that we haven't been disabled with a hint. */
338 if (resource_disabled("acpi", 0))
341 /* Make sure we're not being doubly invoked. */
342 if (device_find_child(parent, "acpi", 0) != NULL)
345 ksnprintf(acpi_ca_version, sizeof(acpi_ca_version), "%x", ACPI_CA_VERSION);
347 /* Initialize root tables. */
348 if (ACPI_FAILURE(acpi_Startup())) {
349 kprintf("ACPI: Try disabling either ACPI or apic support.\n");
353 /* Attach the actual ACPI device. */
354 if ((child = BUS_ADD_CHILD(parent, parent, 10, "acpi", 0)) == NULL) {
355 device_printf(parent, "device_identify failed\n");
361 * Fetch some descriptive data from ACPI to put in our attach message.
364 acpi_probe(device_t dev)
366 ACPI_TABLE_RSDP *rsdp;
367 ACPI_TABLE_HEADER *rsdt;
368 ACPI_PHYSICAL_ADDRESS paddr;
369 char buf[ACPI_OEM_ID_SIZE + ACPI_OEM_TABLE_ID_SIZE + 2];
372 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
374 if (power_pm_get_type() != POWER_PM_TYPE_NONE &&
375 power_pm_get_type() != POWER_PM_TYPE_ACPI) {
376 device_printf(dev, "probe failed, other PM system enabled.\n");
377 return_VALUE (ENXIO);
380 if ((paddr = AcpiOsGetRootPointer()) == 0 ||
381 (rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP))) == NULL)
382 return_VALUE (ENXIO);
383 if (rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress != 0)
384 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress;
386 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress;
387 AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP));
389 if ((rsdt = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER))) == NULL)
390 return_VALUE (ENXIO);
391 sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN);
392 sbuf_bcat(&sb, rsdt->OemId, ACPI_OEM_ID_SIZE);
395 sbuf_bcat(&sb, rsdt->OemTableId, ACPI_OEM_TABLE_ID_SIZE);
398 device_set_desc_copy(dev, sbuf_data(&sb));
400 AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER));
406 acpi_attach(device_t dev)
408 struct acpi_softc *sc;
409 ACPI_TABLE_FACS *facs;
416 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
418 sc = device_get_softc(dev);
420 callout_init(&sc->susp_force_to);
422 if ((error = acpi_task_thread_init())) {
423 device_printf(dev, "Could not start task thread.\n");
429 /* Initialize resource manager. */
430 acpi_rman_io.rm_type = RMAN_ARRAY;
431 acpi_rman_io.rm_start = 0;
432 acpi_rman_io.rm_end = 0xffff;
433 acpi_rman_io.rm_descr = "ACPI I/O ports";
434 if (rman_init(&acpi_rman_io) != 0)
435 panic("acpi rman_init IO ports failed");
436 acpi_rman_mem.rm_type = RMAN_ARRAY;
437 acpi_rman_mem.rm_start = 0;
438 acpi_rman_mem.rm_end = ~0ul;
439 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses";
440 if (rman_init(&acpi_rman_mem) != 0)
441 panic("acpi rman_init memory failed");
443 /* Initialise the ACPI mutex */
444 ACPI_LOCK_INIT(acpi, "acpi");
445 ACPI_SERIAL_INIT(acpi);
448 * Set the globals from our tunables. This is needed because ACPI-CA
449 * uses UINT8 for some values and we have no tunable_byte.
451 AcpiGbl_AllMethodsSerialized = acpi_serialize_methods;
452 AcpiGbl_EnableInterpreterSlack = TRUE;
454 /* Start up the ACPI CA subsystem. */
455 status = AcpiInitializeSubsystem();
456 if (ACPI_FAILURE(status)) {
457 device_printf(dev, "Could not initialize Subsystem: %s\n",
458 AcpiFormatException(status));
462 /* Load ACPI name space. */
463 status = AcpiLoadTables();
464 if (ACPI_FAILURE(status)) {
465 device_printf(dev, "Could not load Namespace: %s\n",
466 AcpiFormatException(status));
470 /* Handle MCFG table if present. */
473 /* Install the default address space handlers. */
474 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT,
475 ACPI_ADR_SPACE_SYSTEM_MEMORY, ACPI_DEFAULT_HANDLER, NULL, NULL);
476 if (ACPI_FAILURE(status)) {
477 device_printf(dev, "Could not initialise SystemMemory handler: %s\n",
478 AcpiFormatException(status));
481 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT,
482 ACPI_ADR_SPACE_SYSTEM_IO, ACPI_DEFAULT_HANDLER, NULL, NULL);
483 if (ACPI_FAILURE(status)) {
484 device_printf(dev, "Could not initialise SystemIO handler: %s\n",
485 AcpiFormatException(status));
488 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT,
489 ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL);
490 if (ACPI_FAILURE(status)) {
491 device_printf(dev, "could not initialise PciConfig handler: %s\n",
492 AcpiFormatException(status));
497 * Note that some systems (specifically, those with namespace evaluation
498 * issues that require the avoidance of parts of the namespace) must
499 * avoid running _INI and _STA on everything, as well as dodging the final
502 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT).
504 * XXX We should arrange for the object init pass after we have attached
505 * all our child devices, but on many systems it works here.
508 if (ktestenv("debug.acpi.avoid"))
509 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT;
511 /* Bring the hardware and basic handlers online. */
512 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) {
513 device_printf(dev, "Could not enable ACPI: %s\n",
514 AcpiFormatException(status));
519 * Call the ECDT probe function to provide EC functionality before
520 * the namespace has been evaluated.
522 * XXX This happens before the sysresource devices have been probed and
523 * attached so its resources come from nexus0. In practice, this isn't
524 * a problem but should be addressed eventually.
526 acpi_ec_ecdt_probe(dev);
528 /* Bring device objects and regions online. */
529 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) {
530 device_printf(dev, "Could not initialize ACPI objects: %s\n",
531 AcpiFormatException(status));
536 * Setup our sysctl tree.
538 * XXX: This doesn't check to make sure that none of these fail.
540 sysctl_ctx_init(&sc->acpi_sysctl_ctx);
541 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx,
542 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO,
543 device_get_name(dev), CTLFLAG_RD, 0, "");
544 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
545 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD,
546 0, 0, acpi_supported_sleep_state_sysctl, "A", "");
547 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
548 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW,
549 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", "");
550 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
551 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW,
552 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", "");
553 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
554 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW,
555 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", "");
556 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
557 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW,
558 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", "");
559 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
560 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW,
561 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", "");
562 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
563 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0,
565 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
566 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode");
567 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
568 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode");
569 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
570 OID_AUTO, "disable_on_reboot", CTLFLAG_RW,
571 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system");
572 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
573 OID_AUTO, "handle_reboot", CTLFLAG_RW,
574 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot");
577 * Default to 1 second before sleeping to give some machines time to
580 sc->acpi_sleep_delay = 1;
582 sc->acpi_verbose = 1;
583 if ((env = kgetenv("hw.acpi.verbose")) != NULL) {
584 if (strcmp(env, "0") != 0)
585 sc->acpi_verbose = 1;
589 /* Only enable S4BIOS by default if the FACS says it is available. */
590 status = AcpiGetTable(ACPI_SIG_FACS, 0, (ACPI_TABLE_HEADER **)&facs);
591 if (ACPI_FAILURE(status)) {
592 device_printf(dev, "couldn't get FACS: %s\n",
593 AcpiFormatException(status));
597 if (facs->Flags & ACPI_FACS_S4_BIOS_PRESENT)
601 * Dispatch the default sleep state to devices. The lid switch is set
602 * to NONE by default to avoid surprising users.
604 sc->acpi_power_button_sx = ACPI_STATE_S5;
605 sc->acpi_lid_switch_sx = ACPI_S_STATES_MAX + 1;
606 sc->acpi_standby_sx = ACPI_STATE_S1;
607 sc->acpi_suspend_sx = ACPI_STATE_S3;
609 /* Pick the first valid sleep state for the sleep button default. */
610 sc->acpi_sleep_button_sx = ACPI_S_STATES_MAX + 1;
611 for (state = ACPI_STATE_S1; state <= ACPI_STATE_S4; state++)
612 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) {
613 sc->acpi_sleep_button_sx = state;
617 acpi_enable_fixed_events(sc);
620 * Scan the namespace and attach/initialise children.
623 /* Register our shutdown handler. */
624 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc,
628 * Register our acpi event handlers.
629 * XXX should be configurable eg. via userland policy manager.
631 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep,
632 sc, ACPI_EVENT_PRI_LAST);
633 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup,
634 sc, ACPI_EVENT_PRI_LAST);
636 /* Flag our initial states. */
637 sc->acpi_enabled = 1;
638 sc->acpi_sstate = ACPI_STATE_S0;
639 sc->acpi_sleep_disabled = 0;
640 /* Create the control device */
641 sc->acpi_dev_t = make_dev(&acpi_ops, 0, UID_ROOT, GID_WHEEL, 0644,
643 sc->acpi_dev_t->si_drv1 = sc;
645 if ((error = acpi_machdep_init(dev)))
648 /* Register ACPI again to pass the correct argument of pm_func. */
649 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc);
651 if (!acpi_disabled("bus"))
652 acpi_probe_children(dev);
657 cputimer_intr_pmfixup();
658 return_VALUE (error);
662 acpi_suspend(device_t dev)
664 device_t child, *devlist;
665 int error, i, numdevs, pstate;
669 /* First give child devices a chance to suspend. */
670 error = bus_generic_suspend(dev);
675 * Now, set them into the appropriate power state, usually D3. If the
676 * device has an _SxD method for the next sleep state, use that power
679 device_get_children(dev, &devlist, &numdevs);
680 for (i = 0; i < numdevs; i++) {
681 /* If the device is not attached, we've powered it down elsewhere. */
683 if (!device_is_attached(child))
687 * Default to D3 for all sleep states. The _SxD method is optional
688 * so set the powerstate even if it's absent.
690 pstate = PCI_POWERSTATE_D3;
691 error = acpi_device_pwr_for_sleep(device_get_parent(child),
693 if ((error == 0 || error == ESRCH) && acpi_do_powerstate)
694 pci_set_powerstate(child, pstate);
696 kfree(devlist, M_TEMP);
703 acpi_resume(device_t dev)
707 device_t child, *devlist;
712 * Put all devices in D0 before resuming them. Call _S0D on each one
713 * since some systems expect this.
715 device_get_children(dev, &devlist, &numdevs);
716 for (i = 0; i < numdevs; i++) {
718 handle = acpi_get_handle(child);
720 AcpiEvaluateObject(handle, "_S0D", NULL, NULL);
721 if (device_is_attached(child) && acpi_do_powerstate)
722 pci_set_powerstate(child, PCI_POWERSTATE_D0);
724 kfree(devlist, M_TEMP);
726 return (bus_generic_resume(dev));
730 acpi_shutdown(device_t dev)
735 /* Allow children to shutdown first. */
736 bus_generic_shutdown(dev);
739 * Enable any GPEs that are able to power-on the system (i.e., RTC).
740 * Also, disable any that are not valid for this state (most).
742 acpi_wake_prep_walk(ACPI_STATE_S5);
748 * Handle a new device being added
751 acpi_add_child(device_t bus, device_t parent, int order, const char *name, int unit)
753 struct acpi_device *ad;
756 if ((ad = kmalloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL)
759 resource_list_init(&ad->ad_rl);
760 child = device_add_child_ordered(parent, order, name, unit);
762 device_set_ivars(child, ad);
764 kfree(ad, M_ACPIDEV);
769 acpi_print_child(device_t bus, device_t child)
771 struct acpi_device *adev = device_get_ivars(child);
772 struct resource_list *rl = &adev->ad_rl;
775 retval += bus_print_child_header(bus, child);
776 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx");
777 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx");
778 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
779 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld");
780 if (device_get_flags(child))
781 retval += kprintf(" flags %#x", device_get_flags(child));
782 retval += bus_print_child_footer(bus, child);
788 * If this device is an ACPI child but no one claimed it, attempt
789 * to power it off. We'll power it back up when a driver is added.
791 * XXX Disabled for now since many necessary devices (like fdc and
792 * ATA) don't claim the devices we created for them but still expect
793 * them to be powered up.
796 acpi_probe_nomatch(device_t bus, device_t child)
799 /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */
803 * If a new driver has a chance to probe a child, first power it up.
805 * XXX Disabled for now (see acpi_probe_nomatch for details).
808 acpi_driver_added(device_t dev, driver_t *driver)
810 device_t child, *devlist;
813 DEVICE_IDENTIFY(driver, dev);
814 device_get_children(dev, &devlist, &numdevs);
815 for (i = 0; i < numdevs; i++) {
817 if (device_get_state(child) == DS_NOTPRESENT) {
818 /* pci_set_powerstate(child, PCI_POWERSTATE_D0); */
819 if (device_probe_and_attach(child) != 0)
820 ; /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */
823 kfree(devlist, M_TEMP);
826 /* Location hint for devctl(8) */
828 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf,
831 struct acpi_device *dinfo = device_get_ivars(child);
833 if (dinfo->ad_handle)
834 ksnprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle));
836 ksnprintf(buf, buflen, "unknown");
840 /* PnP information for devctl(8) */
842 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf,
845 ACPI_DEVICE_INFO *adinfo;
846 struct acpi_device *dinfo = device_get_ivars(child);
850 error = AcpiGetObjectInfo(dinfo->ad_handle, &adinfo);
852 ksnprintf(buf, buflen, "unknown");
854 ksnprintf(buf, buflen, "_HID=%s _UID=%lu",
855 (adinfo->Valid & ACPI_VALID_HID) ?
856 adinfo->HardwareId.String : "none",
857 (adinfo->Valid & ACPI_VALID_UID) ?
858 strtoul(adinfo->UniqueId.String, &end, 10) : 0);
866 * Handle per-device ivars
869 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
871 struct acpi_device *ad;
873 if ((ad = device_get_ivars(child)) == NULL) {
874 kprintf("device has no ivars\n");
878 /* ACPI and ISA compatibility ivars */
880 case ACPI_IVAR_HANDLE:
881 *(ACPI_HANDLE *)result = ad->ad_handle;
883 case ACPI_IVAR_MAGIC:
884 *(uintptr_t *)result = ad->ad_magic;
886 case ACPI_IVAR_PRIVATE:
887 *(void **)result = ad->ad_private;
889 case ACPI_IVAR_FLAGS:
890 *(int *)result = ad->ad_flags;
892 case ISA_IVAR_VENDORID:
893 case ISA_IVAR_SERIAL:
894 case ISA_IVAR_COMPATID:
897 case ISA_IVAR_LOGICALID:
898 *(int *)result = acpi_isa_get_logicalid(child);
908 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value)
910 struct acpi_device *ad;
912 if ((ad = device_get_ivars(child)) == NULL) {
913 kprintf("device has no ivars\n");
918 case ACPI_IVAR_HANDLE:
919 ad->ad_handle = (ACPI_HANDLE)value;
921 case ACPI_IVAR_MAGIC:
922 ad->ad_magic = (uintptr_t)value;
924 case ACPI_IVAR_PRIVATE:
925 ad->ad_private = (void *)value;
927 case ACPI_IVAR_FLAGS:
928 ad->ad_flags = (int)value;
931 panic("bad ivar write request (%d)", index);
939 * Handle child resource allocation/removal
941 static struct resource_list *
942 acpi_get_rlist(device_t dev, device_t child)
944 struct acpi_device *ad;
946 ad = device_get_ivars(child);
951 * Pre-allocate/manage all memory and IO resources. Since rman can't handle
952 * duplicates, we merge any in the sysresource attach routine.
955 acpi_sysres_alloc(device_t dev)
957 struct resource *res;
958 struct resource_list *rl;
959 struct resource_list_entry *rle;
961 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL };
965 * Probe/attach any sysresource devices. This would be unnecessary if we
966 * had multi-pass probe/attach.
968 if (device_get_children(dev, &children, &child_count) != 0)
970 for (i = 0; i < child_count; i++) {
971 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL)
972 device_probe_and_attach(children[i]);
974 kfree(children, M_TEMP);
976 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev);
979 SLIST_FOREACH(rle, rl, link) {
980 if (rle->res != NULL) {
981 device_printf(dev, "duplicate resource for %lx\n", rle->start);
985 /* Only memory and IO resources are valid here. */
997 /* Pre-allocate resource and add to our rman pool. */
998 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type,
999 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 0);
1001 rman_manage_region(rm, rman_get_start(res), rman_get_end(res));
1004 device_printf(dev, "reservation of %lx, %lx (%d) failed\n",
1005 rle->start, rle->count, rle->type);
1010 static struct resource *
1011 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid,
1012 u_long start, u_long end, u_long count, u_int flags)
1015 struct acpi_device *ad = device_get_ivars(child);
1016 struct resource_list *rl = &ad->ad_rl;
1017 struct resource_list_entry *rle;
1018 struct resource *res;
1023 /* We only handle memory and IO resources through rman. */
1025 case SYS_RES_IOPORT:
1028 case SYS_RES_MEMORY:
1029 rm = &acpi_rman_mem;
1035 ACPI_SERIAL_BEGIN(acpi);
1038 * If this is an allocation of the "default" range for a given RID, and
1039 * we know what the resources for this device are (i.e., they're on the
1040 * child's resource list), use those start/end values.
1042 if (bus == device_get_parent(child) && start == 0UL && end == ~0UL) {
1043 rle = resource_list_find(rl, type, *rid);
1052 * If this is an allocation of a specific range, see if we can satisfy
1053 * the request from our system resource regions. If we can't, pass the
1054 * request up to the parent.
1056 if (start + count - 1 == end && rm != NULL)
1057 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE,
1060 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid,
1061 start, end, count, flags);
1063 rman_set_rid(res, *rid);
1065 /* If requested, activate the resource using the parent's method. */
1066 if (flags & RF_ACTIVE)
1067 if (bus_activate_resource(child, type, *rid, res) != 0) {
1068 rman_release_resource(res);
1074 if (res != NULL && device_get_parent(child) == bus)
1078 * Since bus_config_intr() takes immediate effect, we cannot
1079 * configure the interrupt associated with a device when we
1080 * parse the resources but have to defer it until a driver
1081 * actually allocates the interrupt via bus_alloc_resource().
1083 * XXX: Should we handle the lookup failing?
1085 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares)))
1086 acpi_config_intr(child, &ares);
1088 kprintf("irq resource not found\n");
1093 ACPI_SERIAL_END(acpi);
1098 acpi_release_resource(device_t bus, device_t child, int type, int rid,
1104 /* We only handle memory and IO resources through rman. */
1106 case SYS_RES_IOPORT:
1109 case SYS_RES_MEMORY:
1110 rm = &acpi_rman_mem;
1116 ACPI_SERIAL_BEGIN(acpi);
1119 * If this resource belongs to one of our internal managers,
1120 * deactivate it and release it to the local pool. If it doesn't,
1121 * pass this request up to the parent.
1123 if (rm != NULL && rman_is_region_manager(r, rm)) {
1124 if (rman_get_flags(r) & RF_ACTIVE) {
1125 ret = bus_deactivate_resource(child, type, rid, r);
1129 ret = rman_release_resource(r);
1131 ret = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, type, rid, r);
1134 ACPI_SERIAL_END(acpi);
1139 acpi_delete_resource(device_t bus, device_t child, int type, int rid)
1141 struct resource_list *rl;
1143 rl = acpi_get_rlist(bus, child);
1144 resource_list_delete(rl, type, rid);
1147 /* Allocate an IO port or memory resource, given its GAS. */
1149 acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas,
1150 struct resource **res, u_int flags)
1152 int error, res_type;
1155 if (type == NULL || rid == NULL || gas == NULL || res == NULL)
1158 /* We only support memory and IO spaces. */
1159 switch (gas->SpaceId) {
1160 case ACPI_ADR_SPACE_SYSTEM_MEMORY:
1161 res_type = SYS_RES_MEMORY;
1163 case ACPI_ADR_SPACE_SYSTEM_IO:
1164 res_type = SYS_RES_IOPORT;
1167 return (EOPNOTSUPP);
1171 * If the register width is less than 8, assume the BIOS author means
1172 * it is a bit field and just allocate a byte.
1174 if (gas->BitWidth && gas->BitWidth < 8)
1177 /* Validate the address after we're sure we support the space. */
1178 if (gas->Address == 0 || gas->BitWidth == 0)
1181 bus_set_resource(dev, res_type, *rid, gas->Address,
1183 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags);
1188 bus_delete_resource(dev, res_type, *rid);
1193 /* Probe _HID and _CID for compatible ISA PNP ids. */
1195 acpi_isa_get_logicalid(device_t dev)
1197 ACPI_DEVICE_INFO *devinfo;
1202 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1206 /* Fetch and validate the HID. */
1207 if ((h = acpi_get_handle(dev)) == NULL)
1209 error = AcpiGetObjectInfo(h, &devinfo);
1210 if (ACPI_FAILURE(error))
1213 if ((devinfo->Valid & ACPI_VALID_HID) != 0)
1214 pnpid = PNP_EISAID(devinfo->HardwareId.String);
1218 AcpiOsFree(devinfo);
1219 return_VALUE (pnpid);
1223 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count)
1225 ACPI_DEVICE_INFO *devinfo;
1231 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1236 /* Fetch and validate the CID */
1237 if ((h = acpi_get_handle(dev)) == NULL)
1239 error = AcpiGetObjectInfo(h, &devinfo);
1240 if (ACPI_FAILURE(error))
1242 if ((devinfo->Valid & ACPI_VALID_CID) == 0)
1245 if (devinfo->CompatibleIdList.Count < count)
1246 count = devinfo->CompatibleIdList.Count;
1247 for (i = 0; i < count; i++) {
1248 if (strncmp(devinfo->CompatibleIdList.Ids[i].String, "PNP", 3) != 0)
1250 *pnpid++ = PNP_EISAID(devinfo->CompatibleIdList.Ids[i].String);
1256 AcpiOsFree(devinfo);
1257 return_VALUE (valid);
1261 acpi_device_id_probe(device_t bus, device_t dev, char **ids)
1266 h = acpi_get_handle(dev);
1267 if (ids == NULL || h == NULL || acpi_get_type(dev) != ACPI_TYPE_DEVICE)
1270 /* Try to match one of the array of IDs with a HID or CID. */
1271 for (i = 0; ids[i] != NULL; i++) {
1272 if (acpi_MatchHid(h, ids[i]))
1279 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname,
1280 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret)
1285 h = ACPI_ROOT_OBJECT;
1286 else if ((h = acpi_get_handle(dev)) == NULL)
1287 return (AE_BAD_PARAMETER);
1288 return (AcpiEvaluateObject(h, pathname, parameters, ret));
1292 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate)
1294 struct acpi_softc *sc;
1300 sc = device_get_softc(bus);
1301 handle = acpi_get_handle(dev);
1304 * XXX If we find these devices, don't try to power them down.
1305 * The serial and IRDA ports on my T23 hang the system when
1306 * set to D3 and it appears that such legacy devices may
1307 * need special handling in their drivers.
1309 if (handle == NULL ||
1310 acpi_MatchHid(handle, "PNP0500") ||
1311 acpi_MatchHid(handle, "PNP0501") ||
1312 acpi_MatchHid(handle, "PNP0502") ||
1313 acpi_MatchHid(handle, "PNP0510") ||
1314 acpi_MatchHid(handle, "PNP0511"))
1318 * Override next state with the value from _SxD, if present. If no
1319 * dstate argument was provided, don't fetch the return value.
1321 ksnprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate);
1323 status = acpi_GetInteger(handle, sxd, dstate);
1325 status = AcpiEvaluateObject(handle, sxd, NULL, NULL);
1342 /* Callback arg for our implementation of walking the namespace. */
1343 struct acpi_device_scan_ctx {
1344 acpi_scan_cb_t user_fn;
1350 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval)
1352 struct acpi_device_scan_ctx *ctx;
1353 device_t dev, old_dev;
1355 ACPI_OBJECT_TYPE type;
1358 * Skip this device if we think we'll have trouble with it or it is
1359 * the parent where the scan began.
1361 ctx = (struct acpi_device_scan_ctx *)arg;
1362 if (acpi_avoid(h) || h == ctx->parent)
1365 /* If this is not a valid device type (e.g., a method), skip it. */
1366 if (ACPI_FAILURE(AcpiGetType(h, &type)))
1368 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR &&
1369 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER)
1373 * Call the user function with the current device. If it is unchanged
1374 * afterwards, return. Otherwise, we update the handle to the new dev.
1376 old_dev = acpi_get_device(h);
1378 status = ctx->user_fn(h, &dev, level, ctx->arg);
1379 if (ACPI_FAILURE(status) || old_dev == dev)
1382 /* Remove the old child and its connection to the handle. */
1383 if (old_dev != NULL) {
1384 device_delete_child(device_get_parent(old_dev), old_dev);
1385 AcpiDetachData(h, acpi_fake_objhandler);
1388 /* Recreate the handle association if the user created a device. */
1390 AcpiAttachData(h, acpi_fake_objhandler, dev);
1396 acpi_device_scan_children(device_t bus, device_t dev, int max_depth,
1397 acpi_scan_cb_t user_fn, void *arg)
1400 struct acpi_device_scan_ctx ctx;
1402 if (acpi_disabled("children"))
1406 h = ACPI_ROOT_OBJECT;
1407 else if ((h = acpi_get_handle(dev)) == NULL)
1408 return (AE_BAD_PARAMETER);
1409 ctx.user_fn = user_fn;
1412 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth, NULL,
1413 acpi_device_scan_cb, &ctx, NULL));
1417 * Even though ACPI devices are not PCI, we use the PCI approach for setting
1418 * device power states since it's close enough to ACPI.
1421 acpi_set_powerstate_method(device_t bus, device_t child, int state)
1428 h = acpi_get_handle(child);
1429 if (state < ACPI_STATE_D0 || state > ACPI_STATE_D3)
1434 /* Ignore errors if the power methods aren't present. */
1435 status = acpi_pwr_switch_consumer(h, state);
1436 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND
1437 && status != AE_BAD_PARAMETER)
1438 device_printf(bus, "failed to set ACPI power state D%d on %s: %s\n",
1439 state, acpi_name(h), AcpiFormatException(status));
1445 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids)
1447 int result, cid_count, i;
1448 uint32_t lid, cids[8];
1450 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1453 * ISA-style drivers attached to ACPI may persist and
1454 * probe manually if we return ENOENT. We never want
1455 * that to happen, so don't ever return it.
1459 /* Scan the supplied IDs for a match */
1460 lid = acpi_isa_get_logicalid(child);
1461 cid_count = acpi_isa_get_compatid(child, cids, 8);
1462 while (ids && ids->ip_id) {
1463 if (lid == ids->ip_id) {
1467 for (i = 0; i < cid_count; i++) {
1468 if (cids[i] == ids->ip_id) {
1477 if (result == 0 && ids->ip_desc)
1478 device_set_desc(child, ids->ip_desc);
1480 return_VALUE (result);
1484 * Look for a MCFG table. If it is present, use the settings for
1485 * domain (segment) 0 to setup PCI config space access via the memory
1489 acpi_enable_pcie(void)
1491 ACPI_TABLE_HEADER *hdr;
1492 ACPI_MCFG_ALLOCATION *alloc, *end;
1495 status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr);
1496 if (ACPI_FAILURE(status))
1499 end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length);
1500 alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1);
1501 while (alloc < end) {
1502 if (alloc->PciSegment == 0) {
1503 pcie_cfgregopen(alloc->Address, alloc->StartBusNumber,
1504 alloc->EndBusNumber);
1512 * Scan all of the ACPI namespace and attach child devices.
1514 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and
1515 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec.
1516 * However, in violation of the spec, some systems place their PCI link
1517 * devices in \, so we have to walk the whole namespace. We check the
1518 * type of namespace nodes, so this should be ok.
1521 acpi_probe_children(device_t bus)
1524 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1527 * Scan the namespace and insert placeholders for all the devices that
1528 * we find. We also probe/attach any early devices.
1530 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because
1531 * we want to create nodes for all devices, not just those that are
1532 * currently present. (This assumes that we don't want to create/remove
1533 * devices as they appear, which might be smarter.)
1535 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n"));
1536 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, NULL,
1537 acpi_probe_child, bus, NULL);
1539 /* Pre-allocate resources for our rman from any sysresource devices. */
1540 acpi_sysres_alloc(bus);
1541 /* Create any static children by calling device identify methods. */
1542 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n"));
1543 bus_generic_probe(bus);
1545 /* Probe/attach all children, created staticly and from the namespace. */
1546 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n"));
1547 bus_generic_attach(bus);
1550 * Some of these children may have attached others as part of their attach
1551 * process (eg. the root PCI bus driver), so rescan.
1553 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n"));
1554 bus_generic_attach(bus);
1556 /* Attach wake sysctls. */
1557 acpi_wake_sysctl_walk(bus);
1559 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n"));
1564 * Determine the probe order for a given device.
1567 acpi_probe_order(ACPI_HANDLE handle, int *order)
1569 ACPI_OBJECT_TYPE type;
1572 * 1. I/O port and memory system resource holders
1573 * 2. Embedded controllers (to handle early accesses)
1574 * 3. PCI Link Devices
1577 AcpiGetType(handle, &type);
1578 if (acpi_MatchHid(handle, "PNP0C01") || acpi_MatchHid(handle, "PNP0C02"))
1580 else if (acpi_MatchHid(handle, "PNP0C09"))
1582 else if (acpi_MatchHid(handle, "PNP0C0F"))
1584 else if (type == ACPI_TYPE_PROCESSOR)
1589 * Evaluate a child device and determine whether we might attach a device to
1593 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status)
1595 ACPI_OBJECT_TYPE type;
1597 device_t bus, child;
1599 char *handle_str, **search;
1600 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI_", "\\_SB_", NULL};
1602 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1604 /* Skip this device if we think we'll have trouble with it. */
1605 if (acpi_avoid(handle))
1606 return_ACPI_STATUS (AE_OK);
1608 bus = (device_t)context;
1609 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) {
1611 case ACPI_TYPE_DEVICE:
1612 case ACPI_TYPE_PROCESSOR:
1613 case ACPI_TYPE_THERMAL:
1614 case ACPI_TYPE_POWER:
1615 if (acpi_disabled("children"))
1619 * Since we scan from \, be sure to skip system scope objects.
1620 * At least \_SB and \_TZ are detected as devices (ACPI-CA bug?)
1622 handle_str = acpi_name(handle);
1623 for (search = scopes; *search != NULL; search++) {
1624 if (strcmp(handle_str, *search) == 0)
1627 if (*search != NULL)
1631 * Create a placeholder device for this node. Sort the
1632 * placeholder so that the probe/attach passes will run
1633 * breadth-first. Orders less than ACPI_DEV_BASE_ORDER
1634 * are reserved for special objects (i.e., system
1635 * resources). CPU devices have a very high order to
1636 * ensure they are probed after other devices.
1638 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str));
1639 order = level * 10 + 100;
1640 acpi_probe_order(handle, &order);
1641 child = BUS_ADD_CHILD(bus, bus, order, NULL, -1);
1645 /* Associate the handle with the device_t and vice versa. */
1646 acpi_set_handle(child, handle);
1647 AcpiAttachData(handle, acpi_fake_objhandler, child);
1650 * Check that the device is present. If it's not present,
1651 * leave it disabled (so that we have a device_t attached to
1652 * the handle, but we don't probe it).
1654 * XXX PCI link devices sometimes report "present" but not
1655 * "functional" (i.e. if disabled). Go ahead and probe them
1656 * anyway since we may enable them later.
1658 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) {
1659 /* Never disable PCI link devices. */
1660 if (acpi_MatchHid(handle, "PNP0C0F"))
1663 * Docking stations should remain enabled since the system
1664 * may be undocked at boot.
1666 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h)))
1669 device_disable(child);
1674 * Get the device's resource settings and attach them.
1675 * Note that if the device has _PRS but no _CRS, we need
1676 * to decide when it's appropriate to try to configure the
1677 * device. Ignore the return value here; it's OK for the
1678 * device not to have any resources.
1680 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL);
1685 return_ACPI_STATUS (AE_OK);
1689 * AcpiAttachData() requires an object handler but never uses it. This is a
1690 * placeholder object handler so we can store a device_t in an ACPI_HANDLE.
1693 acpi_fake_objhandler(ACPI_HANDLE h, void *data)
1698 acpi_shutdown_final(void *arg, int howto)
1700 struct acpi_softc *sc;
1704 * XXX Shutdown code should only run on the BSP (cpuid 0).
1705 * Some chipsets do not power off the system correctly if called from
1709 if ((howto & RB_POWEROFF) != 0) {
1710 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5);
1711 if (ACPI_FAILURE(status)) {
1712 kprintf("AcpiEnterSleepStatePrep failed - %s\n",
1713 AcpiFormatException(status));
1716 kprintf("Powering system off using ACPI\n");
1717 ACPI_DISABLE_IRQS();
1718 status = AcpiEnterSleepState(ACPI_STATE_S5);
1719 if (ACPI_FAILURE(status)) {
1720 kprintf("ACPI power-off failed - %s\n", AcpiFormatException(status));
1723 kprintf("ACPI power-off failed - timeout\n");
1725 } else if ((howto & RB_HALT) == 0 &&
1726 (AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) &&
1727 sc->acpi_handle_reboot) {
1728 /* Reboot using the reset register. */
1730 AcpiGbl_FADT.ResetValue, &AcpiGbl_FADT.ResetRegister);
1731 if (ACPI_FAILURE(status)) {
1732 kprintf("ACPI reset failed - %s\n", AcpiFormatException(status));
1735 kprintf("ACPI reset failed - timeout\n");
1737 } else if (sc->acpi_do_disable && panicstr == NULL) {
1739 * Only disable ACPI if the user requested. On some systems, writing
1740 * the disable value to SMI_CMD hangs the system.
1742 kprintf("Shutting down ACPI\n");
1748 acpi_enable_fixed_events(struct acpi_softc *sc)
1750 static int first_time = 1;
1752 /* Enable and clear fixed events and install handlers. */
1753 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) {
1754 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON);
1755 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON,
1756 acpi_event_power_button_sleep, sc);
1758 device_printf(sc->acpi_dev, "Power Button (fixed)\n");
1760 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) {
1761 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON);
1762 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON,
1763 acpi_event_sleep_button_sleep, sc);
1765 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n");
1772 * Returns true if the device is actually present and should
1773 * be attached to. This requires the present, enabled, UI-visible
1774 * and diagnostics-passed bits to be set.
1777 acpi_DeviceIsPresent(device_t dev)
1779 ACPI_DEVICE_INFO *devinfo;
1785 if ((h = acpi_get_handle(dev)) == NULL)
1787 error = AcpiGetObjectInfo(h, &devinfo);
1788 if (ACPI_FAILURE(error))
1791 /* If no _STA method, must be present */
1792 if ((devinfo->Valid & ACPI_VALID_STA) == 0)
1795 /* Return true for 'present' and 'functioning' */
1796 if (ACPI_DEVICE_PRESENT(devinfo->CurrentStatus))
1799 AcpiOsFree(devinfo);
1804 * Returns true if the battery is actually present and inserted.
1807 acpi_BatteryIsPresent(device_t dev)
1809 ACPI_DEVICE_INFO *devinfo;
1815 if ((h = acpi_get_handle(dev)) == NULL)
1817 error = AcpiGetObjectInfo(h, &devinfo);
1818 if (ACPI_FAILURE(error))
1821 /* If no _STA method, must be present */
1822 if ((devinfo->Valid & ACPI_VALID_STA) == 0)
1825 /* Return true for 'present', 'battery present', and 'functioning' */
1826 if (ACPI_BATTERY_PRESENT(devinfo->CurrentStatus))
1829 AcpiOsFree(devinfo);
1834 * Match a HID string against a handle
1837 acpi_MatchHid(ACPI_HANDLE h, const char *hid)
1839 ACPI_DEVICE_INFO *devinfo;
1844 if (hid == NULL || h == NULL)
1846 error = AcpiGetObjectInfo(h, &devinfo);
1847 if (ACPI_FAILURE(error))
1850 if ((devinfo->Valid & ACPI_VALID_HID) != 0 &&
1851 strcmp(hid, devinfo->HardwareId.String) == 0)
1853 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) {
1854 for (i = 0; i < devinfo->CompatibleIdList.Count; i++) {
1855 if (strcmp(hid, devinfo->CompatibleIdList.Ids[i].String) == 0) {
1862 AcpiOsFree(devinfo);
1867 * Return the handle of a named object within our scope, ie. that of (parent)
1868 * or one if its parents.
1871 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result)
1876 /* Walk back up the tree to the root */
1878 status = AcpiGetHandle(parent, path, &r);
1879 if (ACPI_SUCCESS(status)) {
1883 /* XXX Return error here? */
1884 if (status != AE_NOT_FOUND)
1886 if (ACPI_FAILURE(AcpiGetParent(parent, &r)))
1887 return (AE_NOT_FOUND);
1892 /* Find the difference between two PM tick counts. */
1894 acpi_TimerDelta(uint32_t end, uint32_t start)
1899 delta = end - start;
1900 else if (AcpiGbl_FADT.Flags & ACPI_FADT_32BIT_TIMER)
1901 delta = ((0xFFFFFFFF - start) + end + 1);
1903 delta = ((0x00FFFFFF - start) + end + 1) & 0x00FFFFFF;
1908 * Allocate a buffer with a preset data size.
1911 acpi_AllocBuffer(int size)
1915 if ((buf = kmalloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL)
1918 buf->Pointer = (void *)(buf + 1);
1923 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number)
1926 ACPI_OBJECT_LIST args;
1928 arg1.Type = ACPI_TYPE_INTEGER;
1929 arg1.Integer.Value = number;
1931 args.Pointer = &arg1;
1933 return (AcpiEvaluateObject(handle, path, &args, NULL));
1937 * Evaluate a path that should return an integer.
1940 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number)
1947 handle = ACPI_ROOT_OBJECT;
1950 * Assume that what we've been pointed at is an Integer object, or
1951 * a method that will return an Integer.
1953 buf.Pointer = ¶m;
1954 buf.Length = sizeof(param);
1955 status = AcpiEvaluateObject(handle, path, NULL, &buf);
1956 if (ACPI_SUCCESS(status)) {
1957 if (param.Type == ACPI_TYPE_INTEGER)
1958 *number = param.Integer.Value;
1964 * In some applications, a method that's expected to return an Integer
1965 * may instead return a Buffer (probably to simplify some internal
1966 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer,
1967 * convert it into an Integer as best we can.
1971 if (status == AE_BUFFER_OVERFLOW) {
1972 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) {
1973 status = AE_NO_MEMORY;
1975 status = AcpiEvaluateObject(handle, path, NULL, &buf);
1976 if (ACPI_SUCCESS(status))
1977 status = acpi_ConvertBufferToInteger(&buf, number);
1978 AcpiOsFree(buf.Pointer);
1985 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number)
1991 p = (ACPI_OBJECT *)bufp->Pointer;
1992 if (p->Type == ACPI_TYPE_INTEGER) {
1993 *number = p->Integer.Value;
1996 if (p->Type != ACPI_TYPE_BUFFER)
1998 if (p->Buffer.Length > sizeof(int))
1999 return (AE_BAD_DATA);
2002 val = p->Buffer.Pointer;
2003 for (i = 0; i < p->Buffer.Length; i++)
2004 *number += val[i] << (i * 8);
2009 * Iterate over the elements of an a package object, calling the supplied
2010 * function for each element.
2012 * XXX possible enhancement might be to abort traversal on error.
2015 acpi_ForeachPackageObject(ACPI_OBJECT *pkg,
2016 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg)
2021 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE)
2022 return (AE_BAD_PARAMETER);
2024 /* Iterate over components */
2026 comp = pkg->Package.Elements;
2027 for (; i < pkg->Package.Count; i++, comp++)
2034 * Find the (index)th resource object in a set.
2037 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp)
2042 rp = (ACPI_RESOURCE *)buf->Pointer;
2046 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length))
2047 return (AE_BAD_PARAMETER);
2049 /* Check for terminator */
2050 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0)
2051 return (AE_NOT_FOUND);
2052 rp = ACPI_NEXT_RESOURCE(rp);
2061 * Append an ACPI_RESOURCE to an ACPI_BUFFER.
2063 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER
2064 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible
2065 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of
2068 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512
2071 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res)
2076 /* Initialise the buffer if necessary. */
2077 if (buf->Pointer == NULL) {
2078 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE;
2079 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL)
2080 return (AE_NO_MEMORY);
2081 rp = (ACPI_RESOURCE *)buf->Pointer;
2082 rp->Type = ACPI_RESOURCE_TYPE_END_TAG;
2089 * Scan the current buffer looking for the terminator.
2090 * This will either find the terminator or hit the end
2091 * of the buffer and return an error.
2093 rp = (ACPI_RESOURCE *)buf->Pointer;
2095 /* Range check, don't go outside the buffer */
2096 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length))
2097 return (AE_BAD_PARAMETER);
2098 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0)
2100 rp = ACPI_NEXT_RESOURCE(rp);
2104 * Check the size of the buffer and expand if required.
2107 * size of existing resources before terminator +
2108 * size of new resource and header +
2109 * size of terminator.
2111 * Note that this loop should really only run once, unless
2112 * for some reason we are stuffing a *really* huge resource.
2114 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) +
2115 res->Length + ACPI_RS_SIZE_NO_DATA +
2116 ACPI_RS_SIZE_MIN) >= buf->Length) {
2117 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL)
2118 return (AE_NO_MEMORY);
2119 bcopy(buf->Pointer, newp, buf->Length);
2120 rp = (ACPI_RESOURCE *)((u_int8_t *)newp +
2121 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer));
2122 AcpiOsFree(buf->Pointer);
2123 buf->Pointer = newp;
2124 buf->Length += buf->Length;
2127 /* Insert the new resource. */
2128 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA);
2130 /* And add the terminator. */
2131 rp = ACPI_NEXT_RESOURCE(rp);
2132 rp->Type = ACPI_RESOURCE_TYPE_END_TAG;
2139 * Set interrupt model.
2142 acpi_SetIntrModel(int model)
2145 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model));
2149 * DEPRECATED. This interface has serious deficiencies and will be
2152 * Immediately enter the sleep state. In the old model, acpiconf(8) ran
2153 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this.
2156 acpi_SetSleepState(struct acpi_softc *sc, int state)
2162 "warning: acpi_SetSleepState() deprecated, need to update your software\n");
2165 return (acpi_EnterSleepState(sc, state));
2169 acpi_sleep_force(void *arg)
2171 struct acpi_softc *sc;
2173 kprintf("acpi: suspend request timed out, forcing sleep now\n");
2175 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate)))
2176 kprintf("acpi: force sleep state S%d failed\n", sc->acpi_next_sstate);
2180 * Request that the system enter the given suspend state. All /dev/apm
2181 * devices and devd(8) will be notified. Userland then has a chance to
2182 * save state and acknowledge the request. The system sleeps once all
2186 acpi_ReqSleepState(struct acpi_softc *sc, int state)
2189 struct apm_clone_data *clone;
2192 if (state < ACPI_STATE_S1 || state > ACPI_STATE_S5)
2195 /* S5 (soft-off) should be entered directly with no waiting. */
2196 if (state == ACPI_STATE_S5) {
2197 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, state)))
2203 #if !defined(__i386__)
2204 /* This platform does not support acpi suspend/resume. */
2205 return (EOPNOTSUPP);
2208 /* If a suspend request is already in progress, just return. */
2210 if (sc->acpi_next_sstate != 0) {
2215 /* Record the pending state and notify all apm devices. */
2216 sc->acpi_next_sstate = state;
2218 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) {
2219 clone->notify_status = APM_EV_NONE;
2220 if ((clone->flags & ACPI_EVF_DEVD) == 0) {
2221 KNOTE(&clone->sel_read.si_note, 0);
2226 /* If devd(8) is not running, immediately enter the sleep state. */
2227 if (devctl_process_running() == FALSE) {
2229 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) {
2236 /* Now notify devd(8) also. */
2237 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state);
2240 * Set a timeout to fire if userland doesn't ack the suspend request
2241 * in time. This way we still eventually go to sleep if we were
2242 * overheating or running low on battery, even if userland is hung.
2243 * We cancel this timeout once all userland acks are in or the
2244 * suspend request is aborted.
2246 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc);
2252 * Acknowledge (or reject) a pending sleep state. The caller has
2253 * prepared for suspend and is now ready for it to proceed. If the
2254 * error argument is non-zero, it indicates suspend should be cancelled
2255 * and gives an errno value describing why. Once all votes are in,
2256 * we suspend the system.
2259 acpi_AckSleepState(struct apm_clone_data *clone, int error)
2261 struct acpi_softc *sc;
2264 #if !defined(__i386__)
2265 /* This platform does not support acpi suspend/resume. */
2266 return (EOPNOTSUPP);
2269 /* If no pending sleep state, return an error. */
2271 sc = clone->acpi_sc;
2272 if (sc->acpi_next_sstate == 0) {
2277 /* Caller wants to abort suspend process. */
2279 sc->acpi_next_sstate = 0;
2280 callout_stop(&sc->susp_force_to);
2281 kprintf("acpi: listener on %s cancelled the pending suspend\n",
2282 devtoname(clone->cdev));
2288 * Mark this device as acking the suspend request. Then, walk through
2289 * all devices, seeing if they agree yet. We only count devices that
2290 * are writable since read-only devices couldn't ack the request.
2292 clone->notify_status = APM_EV_ACKED;
2294 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) {
2295 if ((clone->flags & ACPI_EVF_WRITE) != 0 &&
2296 clone->notify_status != APM_EV_ACKED) {
2302 /* If all devices have voted "yes", we will suspend now. */
2304 callout_stop(&sc->susp_force_to);
2308 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate)))
2316 acpi_sleep_enable(void *arg)
2319 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0;
2322 enum acpi_sleep_state {
2325 ACPI_SS_DEV_SUSPEND,
2331 * Enter the desired system sleep state.
2333 * Currently we support S1-S5 but S4 is only S4BIOS
2336 acpi_EnterSleepState(struct acpi_softc *sc, int state)
2341 enum acpi_sleep_state slp_state;
2343 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
2345 /* Re-entry once we're suspending is not allowed. */
2348 if (sc->acpi_sleep_disabled) {
2350 kprintf("acpi: suspend request ignored (not ready yet)\n");
2353 sc->acpi_sleep_disabled = 1;
2357 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE
2358 * drivers need this.
2361 slp_state = ACPI_SS_NONE;
2367 status = AcpiGetSleepTypeData(state, &TypeA, &TypeB);
2368 if (status == AE_NOT_FOUND) {
2369 device_printf(sc->acpi_dev,
2370 "Sleep state S%d not supported by BIOS\n", state);
2372 } else if (ACPI_FAILURE(status)) {
2373 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n",
2374 AcpiFormatException(status));
2378 sc->acpi_sstate = state;
2380 /* Enable any GPEs as appropriate and requested by the user. */
2381 acpi_wake_prep_walk(state);
2382 slp_state = ACPI_SS_GPE_SET;
2385 * Inform all devices that we are going to sleep. If at least one
2386 * device fails, DEVICE_SUSPEND() automatically resumes the tree.
2388 * XXX Note that a better two-pass approach with a 'veto' pass
2389 * followed by a "real thing" pass would be better, but the current
2390 * bus interface does not provide for this.
2392 if (DEVICE_SUSPEND(root_bus) != 0) {
2393 device_printf(sc->acpi_dev, "device_suspend failed\n");
2396 slp_state = ACPI_SS_DEV_SUSPEND;
2398 /* If testing device suspend only, back out of everything here. */
2399 if (acpi_susp_bounce)
2402 status = AcpiEnterSleepStatePrep(state);
2403 if (ACPI_FAILURE(status)) {
2404 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n",
2405 AcpiFormatException(status));
2408 slp_state = ACPI_SS_SLP_PREP;
2410 if (sc->acpi_sleep_delay > 0)
2411 DELAY(sc->acpi_sleep_delay * 1000000);
2413 if (state != ACPI_STATE_S1) {
2414 acpi_sleep_machdep(sc, state);
2416 /* Re-enable ACPI hardware on wakeup from sleep state 4. */
2417 if (state == ACPI_STATE_S4)
2420 ACPI_DISABLE_IRQS();
2421 status = AcpiEnterSleepState(state);
2422 if (ACPI_FAILURE(status)) {
2423 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n",
2424 AcpiFormatException(status));
2428 slp_state = ACPI_SS_SLEPT;
2432 * Shut down cleanly and power off. This will call us back through the
2433 * shutdown handlers.
2435 shutdown_nice(RB_POWEROFF);
2439 status = AE_BAD_PARAMETER;
2444 * Back out state according to how far along we got in the suspend
2445 * process. This handles both the error and success cases.
2447 sc->acpi_next_sstate = 0;
2448 if (slp_state >= ACPI_SS_GPE_SET) {
2449 acpi_wake_prep_walk(state);
2450 sc->acpi_sstate = ACPI_STATE_S0;
2452 if (slp_state >= ACPI_SS_SLP_PREP)
2453 AcpiLeaveSleepState(state);
2454 if (slp_state >= ACPI_SS_DEV_SUSPEND)
2455 DEVICE_RESUME(root_bus);
2456 if (slp_state >= ACPI_SS_SLEPT)
2457 acpi_enable_fixed_events(sc);
2459 /* Allow another sleep request after a while. */
2460 /* XXX: needs timeout */
2461 if (state != ACPI_STATE_S5)
2462 acpi_sleep_enable(sc);
2464 /* Run /etc/rc.resume after we are back. */
2465 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state);
2468 return_ACPI_STATUS (status);
2471 /* Initialize a device's wake GPE. */
2473 acpi_wake_init(device_t dev)
2475 struct acpi_prw_data prw;
2477 /* Evaluate _PRW to find the GPE. */
2478 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0)
2481 /* Set ACPI_GPE_CAN_WAKE on the GPE */
2482 if (ACPI_FAILURE(AcpiSetupGpeForWake(prw.gpe_handle, NULL, prw.gpe_bit))) {
2483 device_printf(dev, "enable GPE failed\n");
2490 /* Enable or disable the device's wake GPE. */
2492 acpi_wake_set_enable(device_t dev, int enable)
2494 struct acpi_prw_data prw;
2498 /* Make sure the device supports waking the system and get the GPE. */
2499 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0)
2502 flags = acpi_get_flags(dev);
2504 status = AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit);
2505 if (ACPI_FAILURE(status)) {
2506 device_printf(dev, "enable wake failed\n");
2509 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED);
2511 status = AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit);
2512 if (ACPI_FAILURE(status)) {
2513 device_printf(dev, "disable wake failed\n");
2516 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED);
2523 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate)
2525 struct acpi_prw_data prw;
2528 /* Check that this is a wake-capable device and get its GPE. */
2529 if (acpi_parse_prw(handle, &prw) != 0)
2531 dev = acpi_get_device(handle);
2534 * The destination sleep state must be less than (i.e., higher power)
2535 * or equal to the value specified by _PRW. If this GPE cannot be
2536 * enabled for the next sleep state, then disable it. If it can and
2537 * the user requested it be enabled, turn on any required power resources
2540 if (sstate > prw.lowest_wake) {
2541 AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit);
2543 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n",
2544 acpi_name(handle), sstate);
2545 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) {
2546 acpi_pwr_wake_enable(handle, 1);
2547 acpi_SetInteger(handle, "_PSW", 1);
2549 device_printf(dev, "wake_prep enabled for %s (S%d)\n",
2550 acpi_name(handle), sstate);
2557 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate)
2559 struct acpi_prw_data prw;
2563 * Check that this is a wake-capable device and get its GPE. Return
2564 * now if the user didn't enable this device for wake.
2566 if (acpi_parse_prw(handle, &prw) != 0)
2568 dev = acpi_get_device(handle);
2569 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0)
2573 * If this GPE couldn't be enabled for the previous sleep state, it was
2574 * disabled before going to sleep so re-enable it. If it was enabled,
2575 * clear _PSW and turn off any power resources it used.
2577 if (sstate > prw.lowest_wake) {
2578 AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit);
2580 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle));
2582 acpi_SetInteger(handle, "_PSW", 0);
2583 acpi_pwr_wake_enable(handle, 0);
2585 device_printf(dev, "run_prep cleaned up for %s\n",
2593 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status)
2597 /* If suspending, run the sleep prep function, otherwise wake. */
2598 sstate = *(int *)context;
2599 if (AcpiGbl_SystemAwakeAndRunning)
2600 acpi_wake_sleep_prep(handle, sstate);
2602 acpi_wake_run_prep(handle, sstate);
2606 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */
2608 acpi_wake_prep_walk(int sstate)
2610 ACPI_HANDLE sb_handle;
2612 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle)))
2613 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100, NULL,
2614 acpi_wake_prep, &sstate, NULL);
2618 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */
2620 acpi_wake_sysctl_walk(device_t dev)
2623 int error, i, numdevs;
2628 error = device_get_children(dev, &devlist, &numdevs);
2629 if (error != 0 || numdevs == 0) {
2631 kfree(devlist, M_TEMP);
2634 for (i = 0; i < numdevs; i++) {
2636 acpi_wake_sysctl_walk(child);
2637 if (!device_is_attached(child))
2639 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL);
2640 if (ACPI_SUCCESS(status)) {
2641 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child),
2642 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO,
2643 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0,
2644 acpi_wake_set_sysctl, "I", "Device set to wake the system");
2647 kfree(devlist, M_TEMP);
2654 /* Enable or disable wake from userland. */
2656 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS)
2661 dev = (device_t)arg1;
2662 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0;
2664 error = sysctl_handle_int(oidp, &enable, 0, req);
2665 if (error != 0 || req->newptr == NULL)
2667 if (enable != 0 && enable != 1)
2670 return (acpi_wake_set_enable(dev, enable));
2674 /* Parse a device's _PRW into a structure. */
2676 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw)
2679 ACPI_BUFFER prw_buffer;
2680 ACPI_OBJECT *res, *res2;
2681 int error, i, power_count;
2683 if (h == NULL || prw == NULL)
2687 * The _PRW object (7.2.9) is only required for devices that have the
2688 * ability to wake the system from a sleeping state.
2691 prw_buffer.Pointer = NULL;
2692 prw_buffer.Length = ACPI_ALLOCATE_BUFFER;
2693 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer);
2694 if (ACPI_FAILURE(status))
2696 res = (ACPI_OBJECT *)prw_buffer.Pointer;
2699 if (!ACPI_PKG_VALID(res, 2))
2703 * Element 1 of the _PRW object:
2704 * The lowest power system sleeping state that can be entered while still
2705 * providing wake functionality. The sleeping state being entered must
2706 * be less than (i.e., higher power) or equal to this value.
2708 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0)
2712 * Element 0 of the _PRW object:
2714 switch (res->Package.Elements[0].Type) {
2715 case ACPI_TYPE_INTEGER:
2717 * If the data type of this package element is numeric, then this
2718 * _PRW package element is the bit index in the GPEx_EN, in the
2719 * GPE blocks described in the FADT, of the enable bit that is
2720 * enabled for the wake event.
2722 prw->gpe_handle = NULL;
2723 prw->gpe_bit = res->Package.Elements[0].Integer.Value;
2726 case ACPI_TYPE_PACKAGE:
2728 * If the data type of this package element is a package, then this
2729 * _PRW package element is itself a package containing two
2730 * elements. The first is an object reference to the GPE Block
2731 * device that contains the GPE that will be triggered by the wake
2732 * event. The second element is numeric and it contains the bit
2733 * index in the GPEx_EN, in the GPE Block referenced by the
2734 * first element in the package, of the enable bit that is enabled for
2737 * For example, if this field is a package then it is of the form:
2738 * Package() {\_SB.PCI0.ISA.GPE, 2}
2740 res2 = &res->Package.Elements[0];
2741 if (!ACPI_PKG_VALID(res2, 2))
2743 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]);
2744 if (prw->gpe_handle == NULL)
2746 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0)
2754 /* Elements 2 to N of the _PRW object are power resources. */
2755 power_count = res->Package.Count - 2;
2756 if (power_count > ACPI_PRW_MAX_POWERRES) {
2757 kprintf("ACPI device %s has too many power resources\n", acpi_name(h));
2760 prw->power_res_count = power_count;
2761 for (i = 0; i < power_count; i++)
2762 prw->power_res[i] = res->Package.Elements[i];
2765 if (prw_buffer.Pointer != NULL)
2766 AcpiOsFree(prw_buffer.Pointer);
2771 * ACPI Event Handlers
2774 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */
2777 acpi_system_eventhandler_sleep(void *arg, int state)
2781 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
2783 /* Check if button action is disabled. */
2784 if (state == ACPI_S_STATES_MAX + 1)
2787 /* Request that the system prepare to enter the given suspend state. */
2788 ret = acpi_ReqSleepState((struct acpi_softc *)arg, state);
2790 kprintf("acpi: request to enter state S%d failed (err %d)\n",
2797 acpi_system_eventhandler_wakeup(void *arg, int state)
2800 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
2802 /* Currently, nothing to do for wakeup. */
2808 * ACPICA Event Handlers (FixedEvent, also called from button notify handler)
2811 acpi_event_power_button_sleep(void *context)
2813 struct acpi_softc *sc = (struct acpi_softc *)context;
2815 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
2817 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx);
2819 return_VALUE (ACPI_INTERRUPT_HANDLED);
2823 acpi_event_power_button_wake(void *context)
2825 struct acpi_softc *sc = (struct acpi_softc *)context;
2827 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
2829 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx);
2831 return_VALUE (ACPI_INTERRUPT_HANDLED);
2835 acpi_event_sleep_button_sleep(void *context)
2837 struct acpi_softc *sc = (struct acpi_softc *)context;
2839 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
2841 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx);
2843 return_VALUE (ACPI_INTERRUPT_HANDLED);
2847 acpi_event_sleep_button_wake(void *context)
2849 struct acpi_softc *sc = (struct acpi_softc *)context;
2851 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
2853 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx);
2855 return_VALUE (ACPI_INTERRUPT_HANDLED);
2859 * XXX This static buffer is suboptimal. There is no locking so only
2860 * use this for single-threaded callers.
2863 acpi_name(ACPI_HANDLE handle)
2866 static char data[256];
2868 buf.Length = sizeof(data);
2871 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf)))
2873 return ("(unknown)");
2877 * Debugging/bug-avoidance. Avoid trying to fetch info on various
2878 * parts of the namespace.
2881 acpi_avoid(ACPI_HANDLE handle)
2883 char *cp, *env, *np;
2886 np = acpi_name(handle);
2889 if ((env = kgetenv("debug.acpi.avoid")) == NULL)
2892 /* Scan the avoid list checking for a match */
2895 while (*cp != 0 && isspace(*cp))
2900 while (cp[len] != 0 && !isspace(cp[len]))
2902 if (!strncmp(cp, np, len)) {
2914 * Debugging/bug-avoidance. Disable ACPI subsystem components.
2917 acpi_disabled(char *subsys)
2922 if ((env = kgetenv("debug.acpi.disabled")) == NULL)
2924 if (strcmp(env, "all") == 0) {
2929 /* Scan the disable list, checking for a match. */
2932 while (*cp != '\0' && isspace(*cp))
2937 while (cp[len] != '\0' && !isspace(cp[len]))
2939 if (strncmp(cp, subsys, len) == 0) {
2951 * Debugging/bug-avoidance. Enable ACPI subsystem components. Most
2952 * components are enabled by default. The ones that are not have to be
2953 * enabled via debug.acpi.enabled.
2956 acpi_enabled(char *subsys)
2961 if ((env = kgetenv("debug.acpi.enabled")) == NULL)
2963 if (strcmp(env, "all") == 0) {
2968 /* Scan the enable list, checking for a match. */
2971 while (*cp != '\0' && isspace(*cp))
2976 while (cp[len] != '\0' && !isspace(cp[len]))
2978 if (strncmp(cp, subsys, len) == 0) {
2990 * Control interface.
2992 * We multiplex ioctls for all participating ACPI devices here. Individual
2993 * drivers wanting to be accessible via /dev/acpi should use the
2994 * register/deregister interface to make their handlers visible.
2996 struct acpi_ioctl_hook
2998 TAILQ_ENTRY(acpi_ioctl_hook) link;
3004 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks;
3005 static int acpi_ioctl_hooks_initted;
3008 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg)
3010 struct acpi_ioctl_hook *hp;
3012 if ((hp = kmalloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL)
3019 if (acpi_ioctl_hooks_initted == 0) {
3020 TAILQ_INIT(&acpi_ioctl_hooks);
3021 acpi_ioctl_hooks_initted = 1;
3023 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link);
3030 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn)
3032 struct acpi_ioctl_hook *hp;
3035 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link)
3036 if (hp->cmd == cmd && hp->fn == fn)
3040 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link);
3041 kfree(hp, M_ACPIDEV);
3047 acpiopen(struct dev_open_args *ap)
3053 acpiclose(struct dev_close_args *ap)
3059 acpiioctl(struct dev_ioctl_args *ap)
3061 struct acpi_softc *sc;
3062 struct acpi_ioctl_hook *hp;
3067 sc = ap->a_head.a_dev->si_drv1;
3070 * Scan the list of registered ioctls, looking for handlers.
3073 if (acpi_ioctl_hooks_initted)
3074 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) {
3075 if (hp->cmd == ap->a_cmd)
3080 return (hp->fn(ap->a_cmd, ap->a_data, hp->arg));
3083 * Core ioctls are not permitted for non-writable user.
3084 * Currently, other ioctls just fetch information.
3085 * Not changing system behavior.
3087 if ((ap->a_fflag & FWRITE) == 0)
3090 /* Core system ioctls. */
3091 switch (ap->a_cmd) {
3092 case ACPIIO_REQSLPSTATE:
3093 state = *(int *)ap->a_data;
3094 if (state != ACPI_STATE_S5)
3095 error = acpi_ReqSleepState(sc, state);
3097 kprintf("power off via acpi ioctl not supported\n");
3101 case ACPIIO_ACKSLPSTATE:
3104 error = *(int *)ap->a_data;
3105 error = acpi_AckSleepState(sc->acpi_clone, error);
3108 case ACPIIO_SETSLPSTATE: /* DEPRECATED */
3110 state = *(int *)ap->a_data;
3111 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX)
3112 if (ACPI_SUCCESS(acpi_SetSleepState(sc, state)))
3123 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
3127 UINT8 state, TypeA, TypeB;
3129 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND);
3130 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX + 1; state++)
3131 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB)))
3132 sbuf_printf(&sb, "S%d ", state);
3135 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req);
3141 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
3143 char sleep_state[10];
3145 u_int new_state, old_state;
3147 old_state = *(u_int *)oidp->oid_arg1;
3148 if (old_state > ACPI_S_STATES_MAX + 1)
3149 strlcpy(sleep_state, "unknown", sizeof(sleep_state));
3151 strlcpy(sleep_state, sleep_state_names[old_state], sizeof(sleep_state));
3152 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req);
3153 if (error == 0 && req->newptr != NULL) {
3154 new_state = ACPI_STATE_S0;
3155 for (; new_state <= ACPI_S_STATES_MAX + 1; new_state++)
3156 if (strcmp(sleep_state, sleep_state_names[new_state]) == 0)
3158 if (new_state <= ACPI_S_STATES_MAX + 1) {
3159 if (new_state != old_state)
3160 *(u_int *)oidp->oid_arg1 = new_state;
3168 /* Inform devctl(4) when we receive a Notify. */
3170 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify)
3172 char notify_buf[16];
3173 ACPI_BUFFER handle_buf;
3176 if (subsystem == NULL)
3179 handle_buf.Pointer = NULL;
3180 handle_buf.Length = ACPI_ALLOCATE_BUFFER;
3181 status = AcpiNsHandleToPathname(h, &handle_buf);
3182 if (ACPI_FAILURE(status))
3184 ksnprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify);
3185 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf);
3186 AcpiOsFree(handle_buf.Pointer);
3191 * Support for parsing debug options from the kernel environment.
3193 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers
3194 * by specifying the names of the bits in the debug.acpi.layer and
3195 * debug.acpi.level environment variables. Bits may be unset by
3196 * prefixing the bit name with !.
3204 static struct debugtag dbg_layer[] = {
3205 {"ACPI_UTILITIES", ACPI_UTILITIES},
3206 {"ACPI_HARDWARE", ACPI_HARDWARE},
3207 {"ACPI_EVENTS", ACPI_EVENTS},
3208 {"ACPI_TABLES", ACPI_TABLES},
3209 {"ACPI_NAMESPACE", ACPI_NAMESPACE},
3210 {"ACPI_PARSER", ACPI_PARSER},
3211 {"ACPI_DISPATCHER", ACPI_DISPATCHER},
3212 {"ACPI_EXECUTER", ACPI_EXECUTER},
3213 {"ACPI_RESOURCES", ACPI_RESOURCES},
3214 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER},
3215 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES},
3216 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER},
3217 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS},
3219 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER},
3220 {"ACPI_BATTERY", ACPI_BATTERY},
3221 {"ACPI_BUS", ACPI_BUS},
3222 {"ACPI_BUTTON", ACPI_BUTTON},
3223 {"ACPI_EC", ACPI_EC},
3224 {"ACPI_FAN", ACPI_FAN},
3225 {"ACPI_POWERRES", ACPI_POWERRES},
3226 {"ACPI_PROCESSOR", ACPI_PROCESSOR},
3227 {"ACPI_THERMAL", ACPI_THERMAL},
3228 {"ACPI_TIMER", ACPI_TIMER},
3229 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS},
3233 static struct debugtag dbg_level[] = {
3234 {"ACPI_LV_INIT", ACPI_LV_INIT},
3235 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT},
3236 {"ACPI_LV_INFO", ACPI_LV_INFO},
3237 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS},
3239 /* Trace verbosity level 1 [Standard Trace Level] */
3240 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES},
3241 {"ACPI_LV_PARSE", ACPI_LV_PARSE},
3242 {"ACPI_LV_LOAD", ACPI_LV_LOAD},
3243 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH},
3244 {"ACPI_LV_EXEC", ACPI_LV_EXEC},
3245 {"ACPI_LV_NAMES", ACPI_LV_NAMES},
3246 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION},
3247 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD},
3248 {"ACPI_LV_TABLES", ACPI_LV_TABLES},
3249 {"ACPI_LV_VALUES", ACPI_LV_VALUES},
3250 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS},
3251 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES},
3252 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS},
3253 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE},
3254 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1},
3256 /* Trace verbosity level 2 [Function tracing and memory allocation] */
3257 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS},
3258 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS},
3259 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS},
3260 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2},
3261 {"ACPI_LV_ALL", ACPI_LV_ALL},
3263 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */
3264 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX},
3265 {"ACPI_LV_THREADS", ACPI_LV_THREADS},
3266 {"ACPI_LV_IO", ACPI_LV_IO},
3267 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS},
3268 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3},
3270 /* Exceptionally verbose output -- also used in the global "DebugLevel" */
3271 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE},
3272 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO},
3273 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES},
3274 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS},
3275 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE},
3280 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag)
3292 while (*ep && !isspace(*ep))
3303 for (i = 0; tag[i].name != NULL; i++) {
3304 if (!strncmp(cp, tag[i].name, l)) {
3306 *flag |= tag[i].value;
3308 *flag &= ~tag[i].value;
3316 acpi_set_debugging(void *junk)
3318 char *layer, *level;
3325 layer = kgetenv("debug.acpi.layer");
3326 level = kgetenv("debug.acpi.level");
3327 if (layer == NULL && level == NULL)
3330 kprintf("ACPI set debug");
3331 if (layer != NULL) {
3332 if (strcmp("NONE", layer) != 0)
3333 kprintf(" layer '%s'", layer);
3334 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer);
3337 if (level != NULL) {
3338 if (strcmp("NONE", level) != 0)
3339 kprintf(" level '%s'", level);
3340 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel);
3346 SYSINIT(acpi_debugging, SI_BOOT1_TUNABLES, SI_ORDER_ANY, acpi_set_debugging,
3350 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS)
3353 struct debugtag *tag;
3356 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL)
3358 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) {
3359 tag = &dbg_layer[0];
3360 dbg = &AcpiDbgLayer;
3362 tag = &dbg_level[0];
3363 dbg = &AcpiDbgLevel;
3366 /* Get old values if this is a get request. */
3367 ACPI_SERIAL_BEGIN(acpi);
3369 sbuf_cpy(&sb, "NONE");
3370 } else if (req->newptr == NULL) {
3371 for (; tag->name != NULL; tag++) {
3372 if ((*dbg & tag->value) == tag->value)
3373 sbuf_printf(&sb, "%s ", tag->name);
3379 /* Copy out the old values to the user. */
3380 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb));
3383 /* If the user is setting a string, parse it. */
3384 if (error == 0 && req->newptr != NULL) {
3386 ksetenv((char *)oidp->oid_arg1, (char *)req->newptr);
3387 acpi_set_debugging(NULL);
3389 ACPI_SERIAL_END(acpi);
3394 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING,
3395 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", "");
3396 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING,
3397 "debug.acpi.level", 0, acpi_debug_sysctl, "A", "");
3398 #endif /* ACPI_DEBUG */
3401 acpi_pm_func(u_long cmd, void *arg, ...)
3403 int state, acpi_state;
3405 struct acpi_softc *sc;
3410 case POWER_CMD_SUSPEND:
3411 sc = (struct acpi_softc *)arg;
3418 state = va_arg(ap, int);
3422 case POWER_SLEEP_STATE_STANDBY:
3423 acpi_state = sc->acpi_standby_sx;
3425 case POWER_SLEEP_STATE_SUSPEND:
3426 acpi_state = sc->acpi_suspend_sx;
3428 case POWER_SLEEP_STATE_HIBERNATE:
3429 acpi_state = ACPI_STATE_S4;
3436 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state)))
3449 acpi_pm_register(void *arg)
3451 if (!cold || resource_disabled("acpi", 0))
3454 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL);
3457 SYSINIT(power, SI_BOOT2_KLD, SI_ORDER_ANY, acpi_pm_register, 0);