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, int cpuid);
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, NULL);
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;
415 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
417 sc = device_get_softc(dev);
419 callout_init(&sc->susp_force_to);
421 if ((error = acpi_task_thread_init())) {
422 device_printf(dev, "Could not start task thread.\n");
428 /* Initialize resource manager. */
429 acpi_rman_io.rm_type = RMAN_ARRAY;
430 acpi_rman_io.rm_start = 0;
431 acpi_rman_io.rm_end = 0xffff;
432 acpi_rman_io.rm_descr = "ACPI I/O ports";
433 if (rman_init(&acpi_rman_io, -1) != 0)
434 panic("acpi rman_init IO ports failed");
435 acpi_rman_mem.rm_type = RMAN_ARRAY;
436 acpi_rman_mem.rm_start = 0;
437 acpi_rman_mem.rm_end = ~0ul;
438 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses";
439 if (rman_init(&acpi_rman_mem, -1) != 0)
440 panic("acpi rman_init memory failed");
442 /* Initialise the ACPI mutex */
443 ACPI_LOCK_INIT(acpi, "acpi");
444 ACPI_SERIAL_INIT(acpi);
447 * Set the globals from our tunables. This is needed because ACPI-CA
448 * uses UINT8 for some values and we have no tunable_byte.
450 AcpiGbl_AllMethodsSerialized = acpi_serialize_methods;
451 AcpiGbl_EnableInterpreterSlack = TRUE;
453 /* Start up the ACPI CA subsystem. */
454 status = AcpiInitializeSubsystem();
455 if (ACPI_FAILURE(status)) {
456 device_printf(dev, "Could not initialize Subsystem: %s\n",
457 AcpiFormatException(status));
461 /* Load ACPI name space. */
462 status = AcpiLoadTables();
463 if (ACPI_FAILURE(status)) {
464 device_printf(dev, "Could not load Namespace: %s\n",
465 AcpiFormatException(status));
469 /* Handle MCFG table if present. */
472 /* Install the default address space handlers. */
473 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT,
474 ACPI_ADR_SPACE_SYSTEM_MEMORY, ACPI_DEFAULT_HANDLER, NULL, NULL);
475 if (ACPI_FAILURE(status)) {
476 device_printf(dev, "Could not initialise SystemMemory handler: %s\n",
477 AcpiFormatException(status));
480 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT,
481 ACPI_ADR_SPACE_SYSTEM_IO, ACPI_DEFAULT_HANDLER, NULL, NULL);
482 if (ACPI_FAILURE(status)) {
483 device_printf(dev, "Could not initialise SystemIO handler: %s\n",
484 AcpiFormatException(status));
487 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT,
488 ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL);
489 if (ACPI_FAILURE(status)) {
490 device_printf(dev, "could not initialise PciConfig handler: %s\n",
491 AcpiFormatException(status));
496 * Note that some systems (specifically, those with namespace evaluation
497 * issues that require the avoidance of parts of the namespace) must
498 * avoid running _INI and _STA on everything, as well as dodging the final
501 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT).
503 * XXX We should arrange for the object init pass after we have attached
504 * all our child devices, but on many systems it works here.
507 if (ktestenv("debug.acpi.avoid"))
508 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT;
510 /* Bring the hardware and basic handlers online. */
511 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) {
512 device_printf(dev, "Could not enable ACPI: %s\n",
513 AcpiFormatException(status));
518 * Fix up the interrupt timer after enabling ACPI, so that the
519 * interrupt cputimer that choked by ACPI power management could
520 * be resurrected before probing various devices.
523 cputimer_intr_pmfixup();
526 * Call the ECDT probe function to provide EC functionality before
527 * the namespace has been evaluated.
529 * XXX This happens before the sysresource devices have been probed and
530 * attached so its resources come from nexus0. In practice, this isn't
531 * a problem but should be addressed eventually.
533 acpi_ec_ecdt_probe(dev);
535 /* Bring device objects and regions online. */
536 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) {
537 device_printf(dev, "Could not initialize ACPI objects: %s\n",
538 AcpiFormatException(status));
543 * Setup our sysctl tree.
545 * XXX: This doesn't check to make sure that none of these fail.
547 sysctl_ctx_init(&sc->acpi_sysctl_ctx);
548 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx,
549 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO,
550 device_get_name(dev), CTLFLAG_RD, 0, "");
551 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
552 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD,
553 0, 0, acpi_supported_sleep_state_sysctl, "A", "");
554 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
555 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW,
556 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", "");
557 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
558 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW,
559 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", "");
560 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
561 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW,
562 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", "");
563 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
564 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW,
565 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", "");
566 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
567 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW,
568 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", "");
569 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
570 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0,
572 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
573 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode");
574 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
575 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode");
576 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
577 OID_AUTO, "disable_on_reboot", CTLFLAG_RW,
578 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system");
579 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
580 OID_AUTO, "handle_reboot", CTLFLAG_RW,
581 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot");
584 * Default to 1 second before sleeping to give some machines time to
587 sc->acpi_sleep_delay = 1;
589 sc->acpi_verbose = 1;
590 if ((env = kgetenv("hw.acpi.verbose")) != NULL) {
591 if (strcmp(env, "0") != 0)
592 sc->acpi_verbose = 1;
596 /* Only enable reboot by default if the FADT says it is available. */
597 if (AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER)
598 sc->acpi_handle_reboot = 1;
600 /* Only enable S4BIOS by default if the FACS says it is available. */
601 if (AcpiGbl_FACS->Flags & ACPI_FACS_S4_BIOS_PRESENT)
605 * Dispatch the default sleep state to devices. The lid switch is set
606 * to NONE by default to avoid surprising users.
608 sc->acpi_power_button_sx = ACPI_STATE_S5;
609 sc->acpi_lid_switch_sx = ACPI_S_STATES_MAX + 1;
610 sc->acpi_standby_sx = ACPI_STATE_S1;
611 sc->acpi_suspend_sx = ACPI_STATE_S3;
613 /* Pick the first valid sleep state for the sleep button default. */
614 sc->acpi_sleep_button_sx = ACPI_S_STATES_MAX + 1;
615 for (state = ACPI_STATE_S1; state <= ACPI_STATE_S4; state++)
616 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) {
617 sc->acpi_sleep_button_sx = state;
621 acpi_enable_fixed_events(sc);
624 * Scan the namespace and attach/initialise children.
627 /* Register our shutdown handler. */
628 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc,
632 * Register our acpi event handlers.
633 * XXX should be configurable eg. via userland policy manager.
635 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep,
636 sc, ACPI_EVENT_PRI_LAST);
637 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup,
638 sc, ACPI_EVENT_PRI_LAST);
640 /* Flag our initial states. */
641 sc->acpi_enabled = 1;
642 sc->acpi_sstate = ACPI_STATE_S0;
643 sc->acpi_sleep_disabled = 0;
644 /* Create the control device */
645 sc->acpi_dev_t = make_dev(&acpi_ops, 0, UID_ROOT, GID_WHEEL, 0644,
647 sc->acpi_dev_t->si_drv1 = sc;
649 if ((error = acpi_machdep_init(dev)))
652 /* Register ACPI again to pass the correct argument of pm_func. */
653 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc);
655 if (!acpi_disabled("bus"))
656 acpi_probe_children(dev);
658 /* Update all GPEs and enable runtime GPEs. */
659 status = AcpiUpdateAllGpes();
660 if (ACPI_FAILURE(status)) {
661 device_printf(dev, "Could not update all GPEs: %s\n",
662 AcpiFormatException(status));
665 /* Allow sleep request after a while. */
666 /* timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); */
671 cputimer_intr_pmfixup();
672 return_VALUE (error);
676 acpi_suspend(device_t dev)
678 device_t child, *devlist;
679 int error, i, numdevs, pstate;
683 /* First give child devices a chance to suspend. */
684 error = bus_generic_suspend(dev);
689 * Now, set them into the appropriate power state, usually D3. If the
690 * device has an _SxD method for the next sleep state, use that power
693 device_get_children(dev, &devlist, &numdevs);
694 for (i = 0; i < numdevs; i++) {
695 /* If the device is not attached, we've powered it down elsewhere. */
697 if (!device_is_attached(child))
701 * Default to D3 for all sleep states. The _SxD method is optional
702 * so set the powerstate even if it's absent.
704 pstate = PCI_POWERSTATE_D3;
705 error = acpi_device_pwr_for_sleep(device_get_parent(child),
707 if ((error == 0 || error == ESRCH) && acpi_do_powerstate)
708 pci_set_powerstate(child, pstate);
710 kfree(devlist, M_TEMP);
717 acpi_resume(device_t dev)
721 device_t child, *devlist;
726 * Put all devices in D0 before resuming them. Call _S0D on each one
727 * since some systems expect this.
729 device_get_children(dev, &devlist, &numdevs);
730 for (i = 0; i < numdevs; i++) {
732 handle = acpi_get_handle(child);
734 AcpiEvaluateObject(handle, "_S0D", NULL, NULL);
735 if (device_is_attached(child) && acpi_do_powerstate)
736 pci_set_powerstate(child, PCI_POWERSTATE_D0);
738 kfree(devlist, M_TEMP);
740 return (bus_generic_resume(dev));
744 acpi_shutdown(device_t dev)
749 /* Allow children to shutdown first. */
750 bus_generic_shutdown(dev);
753 * Enable any GPEs that are able to power-on the system (i.e., RTC).
754 * Also, disable any that are not valid for this state (most).
756 acpi_wake_prep_walk(ACPI_STATE_S5);
762 * Handle a new device being added
765 acpi_add_child(device_t bus, device_t parent, int order, const char *name, int unit)
767 struct acpi_device *ad;
770 if ((ad = kmalloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL)
773 resource_list_init(&ad->ad_rl);
774 child = device_add_child_ordered(parent, order, name, unit);
776 device_set_ivars(child, ad);
778 kfree(ad, M_ACPIDEV);
783 acpi_print_child(device_t bus, device_t child)
785 struct acpi_device *adev = device_get_ivars(child);
786 struct resource_list *rl = &adev->ad_rl;
789 retval += bus_print_child_header(bus, child);
790 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx");
791 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx");
792 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
793 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld");
794 if (device_get_flags(child))
795 retval += kprintf(" flags %#x", device_get_flags(child));
796 retval += bus_print_child_footer(bus, child);
802 * If this device is an ACPI child but no one claimed it, attempt
803 * to power it off. We'll power it back up when a driver is added.
805 * XXX Disabled for now since many necessary devices (like fdc and
806 * ATA) don't claim the devices we created for them but still expect
807 * them to be powered up.
810 acpi_probe_nomatch(device_t bus, device_t child)
813 /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */
817 * If a new driver has a chance to probe a child, first power it up.
819 * XXX Disabled for now (see acpi_probe_nomatch for details).
822 acpi_driver_added(device_t dev, driver_t *driver)
824 device_t child, *devlist;
827 DEVICE_IDENTIFY(driver, dev);
828 device_get_children(dev, &devlist, &numdevs);
829 for (i = 0; i < numdevs; i++) {
831 if (device_get_state(child) == DS_NOTPRESENT) {
832 /* pci_set_powerstate(child, PCI_POWERSTATE_D0); */
833 if (device_probe_and_attach(child) != 0)
834 ; /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */
837 kfree(devlist, M_TEMP);
840 /* Location hint for devctl(8) */
842 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf,
845 struct acpi_device *dinfo = device_get_ivars(child);
847 if (dinfo->ad_handle)
848 ksnprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle));
850 ksnprintf(buf, buflen, "unknown");
854 /* PnP information for devctl(8) */
856 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf,
859 ACPI_DEVICE_INFO *adinfo;
860 struct acpi_device *dinfo = device_get_ivars(child);
864 error = AcpiGetObjectInfo(dinfo->ad_handle, &adinfo);
866 ksnprintf(buf, buflen, "unknown");
868 ksnprintf(buf, buflen, "_HID=%s _UID=%lu",
869 (adinfo->Valid & ACPI_VALID_HID) ?
870 adinfo->HardwareId.String : "none",
871 (adinfo->Valid & ACPI_VALID_UID) ?
872 strtoul(adinfo->UniqueId.String, &end, 10) : 0);
880 * Handle per-device ivars
883 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
885 struct acpi_device *ad;
887 if ((ad = device_get_ivars(child)) == NULL) {
888 kprintf("device has no ivars\n");
892 /* ACPI and ISA compatibility ivars */
894 case ACPI_IVAR_HANDLE:
895 *(ACPI_HANDLE *)result = ad->ad_handle;
897 case ACPI_IVAR_MAGIC:
898 *(uintptr_t *)result = ad->ad_magic;
900 case ACPI_IVAR_PRIVATE:
901 *(void **)result = ad->ad_private;
903 case ACPI_IVAR_FLAGS:
904 *(int *)result = ad->ad_flags;
906 case ISA_IVAR_VENDORID:
907 case ISA_IVAR_SERIAL:
908 case ISA_IVAR_COMPATID:
911 case ISA_IVAR_LOGICALID:
912 *(int *)result = acpi_isa_get_logicalid(child);
922 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value)
924 struct acpi_device *ad;
926 if ((ad = device_get_ivars(child)) == NULL) {
927 kprintf("device has no ivars\n");
932 case ACPI_IVAR_HANDLE:
933 ad->ad_handle = (ACPI_HANDLE)value;
935 case ACPI_IVAR_MAGIC:
936 ad->ad_magic = (uintptr_t)value;
938 case ACPI_IVAR_PRIVATE:
939 ad->ad_private = (void *)value;
941 case ACPI_IVAR_FLAGS:
942 ad->ad_flags = (int)value;
945 panic("bad ivar write request (%d)", index);
953 * Handle child resource allocation/removal
955 static struct resource_list *
956 acpi_get_rlist(device_t dev, device_t child)
958 struct acpi_device *ad;
960 ad = device_get_ivars(child);
965 * Pre-allocate/manage all memory and IO resources. Since rman can't handle
966 * duplicates, we merge any in the sysresource attach routine.
969 acpi_sysres_alloc(device_t dev)
971 struct resource *res;
972 struct resource_list *rl;
973 struct resource_list_entry *rle;
975 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL };
979 * Probe/attach any sysresource devices. This would be unnecessary if we
980 * had multi-pass probe/attach.
982 if (device_get_children(dev, &children, &child_count) != 0)
984 for (i = 0; i < child_count; i++) {
985 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL)
986 device_probe_and_attach(children[i]);
988 kfree(children, M_TEMP);
990 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev);
993 SLIST_FOREACH(rle, rl, link) {
994 if (rle->res != NULL) {
995 device_printf(dev, "duplicate resource for %lx\n", rle->start);
999 /* Only memory and IO resources are valid here. */
1000 switch (rle->type) {
1001 case SYS_RES_IOPORT:
1004 case SYS_RES_MEMORY:
1005 rm = &acpi_rman_mem;
1011 /* Pre-allocate resource and add to our rman pool. */
1012 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type,
1013 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count,
1016 rman_manage_region(rm, rman_get_start(res), rman_get_end(res));
1019 device_printf(dev, "reservation of %lx, %lx (%d) failed\n",
1020 rle->start, rle->count, rle->type);
1025 static struct resource *
1026 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid,
1027 u_long start, u_long end, u_long count, u_int flags, int cpuid)
1030 struct acpi_device *ad = device_get_ivars(child);
1031 struct resource_list *rl = &ad->ad_rl;
1032 struct resource_list_entry *rle;
1033 struct resource *res;
1038 /* We only handle memory and IO resources through rman. */
1040 case SYS_RES_IOPORT:
1043 case SYS_RES_MEMORY:
1044 rm = &acpi_rman_mem;
1050 ACPI_SERIAL_BEGIN(acpi);
1053 * If this is an allocation of the "default" range for a given RID, and
1054 * we know what the resources for this device are (i.e., they're on the
1055 * child's resource list), use those start/end values.
1057 if (bus == device_get_parent(child) && start == 0UL && end == ~0UL) {
1058 rle = resource_list_find(rl, type, *rid);
1068 * If this is an allocation of a specific range, see if we can satisfy
1069 * the request from our system resource regions. If we can't, pass the
1070 * request up to the parent.
1072 if (start + count - 1 == end && rm != NULL)
1073 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE,
1076 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid,
1077 start, end, count, flags, cpuid);
1079 rman_set_rid(res, *rid);
1081 /* If requested, activate the resource using the parent's method. */
1082 if (flags & RF_ACTIVE)
1083 if (bus_activate_resource(child, type, *rid, res) != 0) {
1084 rman_release_resource(res);
1090 if (res != NULL && device_get_parent(child) == bus)
1094 * Since bus_config_intr() takes immediate effect, we cannot
1095 * configure the interrupt associated with a device when we
1096 * parse the resources but have to defer it until a driver
1097 * actually allocates the interrupt via bus_alloc_resource().
1099 * XXX: Should we handle the lookup failing?
1101 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares)))
1102 acpi_config_intr(child, &ares);
1104 kprintf("irq resource not found\n");
1109 ACPI_SERIAL_END(acpi);
1114 acpi_release_resource(device_t bus, device_t child, int type, int rid,
1120 /* We only handle memory and IO resources through rman. */
1122 case SYS_RES_IOPORT:
1125 case SYS_RES_MEMORY:
1126 rm = &acpi_rman_mem;
1132 ACPI_SERIAL_BEGIN(acpi);
1135 * If this resource belongs to one of our internal managers,
1136 * deactivate it and release it to the local pool. If it doesn't,
1137 * pass this request up to the parent.
1139 if (rm != NULL && rman_is_region_manager(r, rm)) {
1140 if (rman_get_flags(r) & RF_ACTIVE) {
1141 ret = bus_deactivate_resource(child, type, rid, r);
1145 ret = rman_release_resource(r);
1147 ret = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, type, rid, r);
1150 ACPI_SERIAL_END(acpi);
1155 acpi_delete_resource(device_t bus, device_t child, int type, int rid)
1157 struct resource_list *rl;
1159 rl = acpi_get_rlist(bus, child);
1160 resource_list_delete(rl, type, rid);
1163 /* Allocate an IO port or memory resource, given its GAS. */
1165 acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas,
1166 struct resource **res, u_int flags)
1168 int error, res_type;
1171 if (type == NULL || rid == NULL || gas == NULL || res == NULL)
1174 /* We only support memory and IO spaces. */
1175 switch (gas->SpaceId) {
1176 case ACPI_ADR_SPACE_SYSTEM_MEMORY:
1177 res_type = SYS_RES_MEMORY;
1179 case ACPI_ADR_SPACE_SYSTEM_IO:
1180 res_type = SYS_RES_IOPORT;
1183 return (EOPNOTSUPP);
1187 * If the register width is less than 8, assume the BIOS author means
1188 * it is a bit field and just allocate a byte.
1190 if (gas->BitWidth && gas->BitWidth < 8)
1193 /* Validate the address after we're sure we support the space. */
1194 if (gas->Address == 0 || gas->BitWidth == 0)
1197 bus_set_resource(dev, res_type, *rid, gas->Address,
1198 gas->BitWidth / 8, -1);
1199 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags);
1204 bus_delete_resource(dev, res_type, *rid);
1209 /* Probe _HID and _CID for compatible ISA PNP ids. */
1211 acpi_isa_get_logicalid(device_t dev)
1213 ACPI_DEVICE_INFO *devinfo;
1218 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1223 /* Fetch and validate the HID. */
1224 if ((h = acpi_get_handle(dev)) == NULL)
1226 error = AcpiGetObjectInfo(h, &devinfo);
1227 if (ACPI_FAILURE(error))
1230 if ((devinfo->Valid & ACPI_VALID_HID) != 0)
1231 pnpid = PNP_EISAID(devinfo->HardwareId.String);
1235 AcpiOsFree(devinfo);
1236 return_VALUE (pnpid);
1240 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count)
1242 ACPI_DEVICE_INFO *devinfo;
1248 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1253 /* Fetch and validate the CID */
1254 if ((h = acpi_get_handle(dev)) == NULL)
1256 error = AcpiGetObjectInfo(h, &devinfo);
1257 if (ACPI_FAILURE(error))
1259 if ((devinfo->Valid & ACPI_VALID_CID) == 0)
1262 if (devinfo->CompatibleIdList.Count < count)
1263 count = devinfo->CompatibleIdList.Count;
1264 for (i = 0; i < count; i++) {
1265 if (strncmp(devinfo->CompatibleIdList.Ids[i].String, "PNP", 3) != 0)
1267 *pnpid++ = PNP_EISAID(devinfo->CompatibleIdList.Ids[i].String);
1273 AcpiOsFree(devinfo);
1274 return_VALUE (valid);
1278 acpi_device_id_probe(device_t bus, device_t dev, char **ids)
1283 h = acpi_get_handle(dev);
1284 if (ids == NULL || h == NULL || acpi_get_type(dev) != ACPI_TYPE_DEVICE)
1287 /* Try to match one of the array of IDs with a HID or CID. */
1288 for (i = 0; ids[i] != NULL; i++) {
1289 if (acpi_MatchHid(h, ids[i]))
1296 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname,
1297 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret)
1302 h = ACPI_ROOT_OBJECT;
1303 else if ((h = acpi_get_handle(dev)) == NULL)
1304 return (AE_BAD_PARAMETER);
1305 return (AcpiEvaluateObject(h, pathname, parameters, ret));
1309 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate)
1311 struct acpi_softc *sc;
1317 sc = device_get_softc(bus);
1318 handle = acpi_get_handle(dev);
1321 * XXX If we find these devices, don't try to power them down.
1322 * The serial and IRDA ports on my T23 hang the system when
1323 * set to D3 and it appears that such legacy devices may
1324 * need special handling in their drivers.
1326 if (handle == NULL ||
1327 acpi_MatchHid(handle, "PNP0500") ||
1328 acpi_MatchHid(handle, "PNP0501") ||
1329 acpi_MatchHid(handle, "PNP0502") ||
1330 acpi_MatchHid(handle, "PNP0510") ||
1331 acpi_MatchHid(handle, "PNP0511"))
1335 * Override next state with the value from _SxD, if present. If no
1336 * dstate argument was provided, don't fetch the return value.
1338 ksnprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate);
1340 status = acpi_GetInteger(handle, sxd, dstate);
1342 status = AcpiEvaluateObject(handle, sxd, NULL, NULL);
1359 /* Callback arg for our implementation of walking the namespace. */
1360 struct acpi_device_scan_ctx {
1361 acpi_scan_cb_t user_fn;
1367 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval)
1369 struct acpi_device_scan_ctx *ctx;
1370 device_t dev, old_dev;
1372 ACPI_OBJECT_TYPE type;
1375 * Skip this device if we think we'll have trouble with it or it is
1376 * the parent where the scan began.
1378 ctx = (struct acpi_device_scan_ctx *)arg;
1379 if (acpi_avoid(h) || h == ctx->parent)
1382 /* If this is not a valid device type (e.g., a method), skip it. */
1383 if (ACPI_FAILURE(AcpiGetType(h, &type)))
1385 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR &&
1386 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER)
1390 * Call the user function with the current device. If it is unchanged
1391 * afterwards, return. Otherwise, we update the handle to the new dev.
1393 old_dev = acpi_get_device(h);
1395 status = ctx->user_fn(h, &dev, level, ctx->arg);
1396 if (ACPI_FAILURE(status) || old_dev == dev)
1399 /* Remove the old child and its connection to the handle. */
1400 if (old_dev != NULL) {
1401 device_delete_child(device_get_parent(old_dev), old_dev);
1402 AcpiDetachData(h, acpi_fake_objhandler);
1405 /* Recreate the handle association if the user created a device. */
1407 AcpiAttachData(h, acpi_fake_objhandler, dev);
1413 acpi_device_scan_children(device_t bus, device_t dev, int max_depth,
1414 acpi_scan_cb_t user_fn, void *arg)
1417 struct acpi_device_scan_ctx ctx;
1419 if (acpi_disabled("children"))
1423 h = ACPI_ROOT_OBJECT;
1424 else if ((h = acpi_get_handle(dev)) == NULL)
1425 return (AE_BAD_PARAMETER);
1426 ctx.user_fn = user_fn;
1429 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth,
1430 acpi_device_scan_cb, NULL, &ctx, NULL));
1434 * Even though ACPI devices are not PCI, we use the PCI approach for setting
1435 * device power states since it's close enough to ACPI.
1438 acpi_set_powerstate_method(device_t bus, device_t child, int state)
1445 h = acpi_get_handle(child);
1446 if (state < ACPI_STATE_D0 || state > ACPI_STATE_D3)
1451 /* Ignore errors if the power methods aren't present. */
1452 status = acpi_pwr_switch_consumer(h, state);
1453 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND
1454 && status != AE_BAD_PARAMETER)
1455 device_printf(bus, "failed to set ACPI power state D%d on %s: %s\n",
1456 state, acpi_name(h), AcpiFormatException(status));
1462 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids)
1464 int result, cid_count, i;
1465 uint32_t lid, cids[8];
1467 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1470 * ISA-style drivers attached to ACPI may persist and
1471 * probe manually if we return ENOENT. We never want
1472 * that to happen, so don't ever return it.
1476 /* Scan the supplied IDs for a match */
1477 lid = acpi_isa_get_logicalid(child);
1478 cid_count = acpi_isa_get_compatid(child, cids, 8);
1479 while (ids && ids->ip_id) {
1480 if (lid == ids->ip_id) {
1484 for (i = 0; i < cid_count; i++) {
1485 if (cids[i] == ids->ip_id) {
1494 if (result == 0 && ids->ip_desc)
1495 device_set_desc(child, ids->ip_desc);
1497 return_VALUE (result);
1501 * Look for a MCFG table. If it is present, use the settings for
1502 * domain (segment) 0 to setup PCI config space access via the memory
1506 acpi_enable_pcie(void)
1508 ACPI_TABLE_HEADER *hdr;
1509 ACPI_MCFG_ALLOCATION *alloc, *end;
1512 status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr);
1513 if (ACPI_FAILURE(status))
1516 end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length);
1517 alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1);
1518 while (alloc < end) {
1519 if (alloc->PciSegment == 0) {
1520 pcie_cfgregopen(alloc->Address, alloc->StartBusNumber,
1521 alloc->EndBusNumber);
1529 * Scan all of the ACPI namespace and attach child devices.
1531 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and
1532 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec.
1533 * However, in violation of the spec, some systems place their PCI link
1534 * devices in \, so we have to walk the whole namespace. We check the
1535 * type of namespace nodes, so this should be ok.
1538 acpi_probe_children(device_t bus)
1541 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1544 * Scan the namespace and insert placeholders for all the devices that
1545 * we find. We also probe/attach any early devices.
1547 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because
1548 * we want to create nodes for all devices, not just those that are
1549 * currently present. (This assumes that we don't want to create/remove
1550 * devices as they appear, which might be smarter.)
1552 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n"));
1553 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100,
1554 acpi_probe_child, NULL, bus, NULL);
1556 /* Pre-allocate resources for our rman from any sysresource devices. */
1557 acpi_sysres_alloc(bus);
1558 /* Create any static children by calling device identify methods. */
1559 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n"));
1560 bus_generic_probe(bus);
1562 /* Probe/attach all children, created staticly and from the namespace. */
1563 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n"));
1564 bus_generic_attach(bus);
1567 * Some of these children may have attached others as part of their attach
1568 * process (eg. the root PCI bus driver), so rescan.
1570 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n"));
1571 bus_generic_attach(bus);
1573 /* Attach wake sysctls. */
1574 acpi_wake_sysctl_walk(bus);
1576 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n"));
1581 * Determine the probe order for a given device.
1584 acpi_probe_order(ACPI_HANDLE handle, int *order)
1586 ACPI_OBJECT_TYPE type;
1589 * 1. I/O port and memory system resource holders
1590 * 2. Embedded controllers (to handle early accesses)
1591 * 3. PCI Link Devices
1594 AcpiGetType(handle, &type);
1595 if (acpi_MatchHid(handle, "PNP0C01") || acpi_MatchHid(handle, "PNP0C02"))
1597 else if (acpi_MatchHid(handle, "PNP0C09"))
1599 else if (acpi_MatchHid(handle, "PNP0C0F"))
1601 else if (type == ACPI_TYPE_PROCESSOR)
1606 * Evaluate a child device and determine whether we might attach a device to
1610 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status)
1612 struct acpi_prw_data prw;
1613 ACPI_OBJECT_TYPE type;
1615 device_t bus, child;
1619 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1621 if (acpi_disabled("children"))
1622 return_ACPI_STATUS (AE_OK);
1624 /* Skip this device if we think we'll have trouble with it. */
1625 if (acpi_avoid(handle))
1626 return_ACPI_STATUS (AE_OK);
1628 bus = (device_t)context;
1629 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) {
1630 handle_str = acpi_name(handle);
1632 case ACPI_TYPE_DEVICE:
1634 * Since we scan from \, be sure to skip system scope objects.
1635 * \_SB_ and \_TZ_ are defined in ACPICA as devices to work around
1636 * BIOS bugs. For example, \_SB_ is to allow \_SB_._INI to be run
1637 * during the intialization and \_TZ_ is to support Notify() on it.
1639 if (strcmp(handle_str, "\\_SB_") == 0 ||
1640 strcmp(handle_str, "\\_TZ_") == 0)
1643 if (acpi_parse_prw(handle, &prw) == 0)
1644 AcpiSetupGpeForWake(handle, prw.gpe_handle, prw.gpe_bit);
1647 case ACPI_TYPE_PROCESSOR:
1648 case ACPI_TYPE_THERMAL:
1649 case ACPI_TYPE_POWER:
1651 * Create a placeholder device for this node. Sort the
1652 * placeholder so that the probe/attach passes will run
1653 * breadth-first. Orders less than ACPI_DEV_BASE_ORDER
1654 * are reserved for special objects (i.e., system
1655 * resources). CPU devices have a very high order to
1656 * ensure they are probed after other devices.
1658 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str));
1659 order = level * 10 + 100;
1660 acpi_probe_order(handle, &order);
1661 child = BUS_ADD_CHILD(bus, bus, order, NULL, -1);
1665 /* Associate the handle with the device_t and vice versa. */
1666 acpi_set_handle(child, handle);
1667 AcpiAttachData(handle, acpi_fake_objhandler, child);
1670 * Check that the device is present. If it's not present,
1671 * leave it disabled (so that we have a device_t attached to
1672 * the handle, but we don't probe it).
1674 * XXX PCI link devices sometimes report "present" but not
1675 * "functional" (i.e. if disabled). Go ahead and probe them
1676 * anyway since we may enable them later.
1678 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) {
1679 /* Never disable PCI link devices. */
1680 if (acpi_MatchHid(handle, "PNP0C0F"))
1683 * Docking stations should remain enabled since the system
1684 * may be undocked at boot.
1686 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h)))
1689 device_disable(child);
1694 * Get the device's resource settings and attach them.
1695 * Note that if the device has _PRS but no _CRS, we need
1696 * to decide when it's appropriate to try to configure the
1697 * device. Ignore the return value here; it's OK for the
1698 * device not to have any resources.
1700 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL);
1705 return_ACPI_STATUS (AE_OK);
1709 * AcpiAttachData() requires an object handler but never uses it. This is a
1710 * placeholder object handler so we can store a device_t in an ACPI_HANDLE.
1713 acpi_fake_objhandler(ACPI_HANDLE h, void *data)
1718 acpi_shutdown_final(void *arg, int howto)
1720 struct acpi_softc *sc;
1724 * XXX Shutdown code should only run on the BSP (cpuid 0).
1725 * Some chipsets do not power off the system correctly if called from
1729 if ((howto & RB_POWEROFF) != 0) {
1730 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5);
1731 if (ACPI_FAILURE(status)) {
1732 kprintf("AcpiEnterSleepStatePrep failed - %s\n",
1733 AcpiFormatException(status));
1736 kprintf("Powering system off using ACPI\n");
1737 ACPI_DISABLE_IRQS();
1738 status = AcpiEnterSleepState(ACPI_STATE_S5);
1739 if (ACPI_FAILURE(status)) {
1740 kprintf("ACPI power-off failed - %s\n", AcpiFormatException(status));
1743 kprintf("ACPI power-off failed - timeout\n");
1745 } else if ((howto & RB_HALT) == 0 && sc->acpi_handle_reboot) {
1746 /* Reboot using the reset register. */
1747 status = AcpiReset();
1748 if (ACPI_FAILURE(status)) {
1749 if (status != AE_NOT_EXIST)
1750 kprintf("ACPI reset failed - %s\n", AcpiFormatException(status));
1753 kprintf("ACPI reset failed - timeout\n");
1755 } else if (sc->acpi_do_disable && panicstr == NULL) {
1757 * Only disable ACPI if the user requested. On some systems, writing
1758 * the disable value to SMI_CMD hangs the system.
1760 kprintf("Shutting down ACPI\n");
1766 acpi_enable_fixed_events(struct acpi_softc *sc)
1768 static int first_time = 1;
1770 /* Enable and clear fixed events and install handlers. */
1771 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) {
1772 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON);
1773 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON,
1774 acpi_event_power_button_sleep, sc);
1776 device_printf(sc->acpi_dev, "Power Button (fixed)\n");
1778 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) {
1779 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON);
1780 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON,
1781 acpi_event_sleep_button_sleep, sc);
1783 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n");
1790 * Returns true if the device is actually present and should
1791 * be attached to. This requires the present, enabled, UI-visible
1792 * and diagnostics-passed bits to be set.
1795 acpi_DeviceIsPresent(device_t dev)
1797 ACPI_DEVICE_INFO *devinfo;
1803 if ((h = acpi_get_handle(dev)) == NULL)
1805 error = AcpiGetObjectInfo(h, &devinfo);
1806 if (ACPI_FAILURE(error))
1809 /* If no _STA method, must be present */
1810 if ((devinfo->Valid & ACPI_VALID_STA) == 0)
1813 /* Return true for 'present' and 'functioning' */
1814 if (ACPI_DEVICE_PRESENT(devinfo->CurrentStatus))
1817 AcpiOsFree(devinfo);
1822 * Returns true if the battery is actually present and inserted.
1825 acpi_BatteryIsPresent(device_t dev)
1827 ACPI_DEVICE_INFO *devinfo;
1833 if ((h = acpi_get_handle(dev)) == NULL)
1835 error = AcpiGetObjectInfo(h, &devinfo);
1836 if (ACPI_FAILURE(error))
1839 /* If no _STA method, must be present */
1840 if ((devinfo->Valid & ACPI_VALID_STA) == 0)
1843 /* Return true for 'present', 'battery present', and 'functioning' */
1844 if (ACPI_BATTERY_PRESENT(devinfo->CurrentStatus))
1847 AcpiOsFree(devinfo);
1852 * Match a HID string against a handle
1855 acpi_MatchHid(ACPI_HANDLE h, const char *hid)
1857 ACPI_DEVICE_INFO *devinfo;
1862 if (hid == NULL || h == NULL)
1864 error = AcpiGetObjectInfo(h, &devinfo);
1865 if (ACPI_FAILURE(error))
1868 if ((devinfo->Valid & ACPI_VALID_HID) != 0 &&
1869 strcmp(hid, devinfo->HardwareId.String) == 0)
1871 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) {
1872 for (i = 0; i < devinfo->CompatibleIdList.Count; i++) {
1873 if (strcmp(hid, devinfo->CompatibleIdList.Ids[i].String) == 0) {
1880 AcpiOsFree(devinfo);
1885 * Return the handle of a named object within our scope, ie. that of (parent)
1886 * or one if its parents.
1889 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result)
1894 /* Walk back up the tree to the root */
1896 status = AcpiGetHandle(parent, path, &r);
1897 if (ACPI_SUCCESS(status)) {
1901 /* XXX Return error here? */
1902 if (status != AE_NOT_FOUND)
1904 if (ACPI_FAILURE(AcpiGetParent(parent, &r)))
1905 return (AE_NOT_FOUND);
1910 /* Find the difference between two PM tick counts. */
1912 acpi_TimerDelta(uint32_t end, uint32_t start)
1917 delta = end - start;
1918 else if (AcpiGbl_FADT.Flags & ACPI_FADT_32BIT_TIMER)
1919 delta = ((0xFFFFFFFF - start) + end + 1);
1921 delta = ((0x00FFFFFF - start) + end + 1) & 0x00FFFFFF;
1926 * Allocate a buffer with a preset data size.
1929 acpi_AllocBuffer(int size)
1933 if ((buf = kmalloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL)
1936 buf->Pointer = (void *)(buf + 1);
1941 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number)
1944 ACPI_OBJECT_LIST args;
1946 arg1.Type = ACPI_TYPE_INTEGER;
1947 arg1.Integer.Value = number;
1949 args.Pointer = &arg1;
1951 return (AcpiEvaluateObject(handle, path, &args, NULL));
1955 * Evaluate a path that should return an integer.
1958 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number)
1965 handle = ACPI_ROOT_OBJECT;
1968 * Assume that what we've been pointed at is an Integer object, or
1969 * a method that will return an Integer.
1971 buf.Pointer = ¶m;
1972 buf.Length = sizeof(param);
1973 status = AcpiEvaluateObject(handle, path, NULL, &buf);
1974 if (ACPI_SUCCESS(status)) {
1975 if (param.Type == ACPI_TYPE_INTEGER)
1976 *number = param.Integer.Value;
1982 * In some applications, a method that's expected to return an Integer
1983 * may instead return a Buffer (probably to simplify some internal
1984 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer,
1985 * convert it into an Integer as best we can.
1989 if (status == AE_BUFFER_OVERFLOW) {
1990 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) {
1991 status = AE_NO_MEMORY;
1993 status = AcpiEvaluateObject(handle, path, NULL, &buf);
1994 if (ACPI_SUCCESS(status))
1995 status = acpi_ConvertBufferToInteger(&buf, number);
1996 AcpiOsFree(buf.Pointer);
2003 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number)
2009 p = (ACPI_OBJECT *)bufp->Pointer;
2010 if (p->Type == ACPI_TYPE_INTEGER) {
2011 *number = p->Integer.Value;
2014 if (p->Type != ACPI_TYPE_BUFFER)
2016 if (p->Buffer.Length > sizeof(int))
2017 return (AE_BAD_DATA);
2020 val = p->Buffer.Pointer;
2021 for (i = 0; i < p->Buffer.Length; i++)
2022 *number += val[i] << (i * 8);
2027 * Iterate over the elements of an a package object, calling the supplied
2028 * function for each element.
2030 * XXX possible enhancement might be to abort traversal on error.
2033 acpi_ForeachPackageObject(ACPI_OBJECT *pkg,
2034 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg)
2039 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE)
2040 return (AE_BAD_PARAMETER);
2042 /* Iterate over components */
2044 comp = pkg->Package.Elements;
2045 for (; i < pkg->Package.Count; i++, comp++)
2052 * Find the (index)th resource object in a set.
2055 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp)
2060 rp = (ACPI_RESOURCE *)buf->Pointer;
2064 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length))
2065 return (AE_BAD_PARAMETER);
2067 /* Check for terminator */
2068 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0)
2069 return (AE_NOT_FOUND);
2070 rp = ACPI_NEXT_RESOURCE(rp);
2079 * Append an ACPI_RESOURCE to an ACPI_BUFFER.
2081 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER
2082 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible
2083 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of
2086 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512
2089 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res)
2094 /* Initialise the buffer if necessary. */
2095 if (buf->Pointer == NULL) {
2096 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE;
2097 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL)
2098 return (AE_NO_MEMORY);
2099 rp = (ACPI_RESOURCE *)buf->Pointer;
2100 rp->Type = ACPI_RESOURCE_TYPE_END_TAG;
2107 * Scan the current buffer looking for the terminator.
2108 * This will either find the terminator or hit the end
2109 * of the buffer and return an error.
2111 rp = (ACPI_RESOURCE *)buf->Pointer;
2113 /* Range check, don't go outside the buffer */
2114 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length))
2115 return (AE_BAD_PARAMETER);
2116 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0)
2118 rp = ACPI_NEXT_RESOURCE(rp);
2122 * Check the size of the buffer and expand if required.
2125 * size of existing resources before terminator +
2126 * size of new resource and header +
2127 * size of terminator.
2129 * Note that this loop should really only run once, unless
2130 * for some reason we are stuffing a *really* huge resource.
2132 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) +
2133 res->Length + ACPI_RS_SIZE_NO_DATA +
2134 ACPI_RS_SIZE_MIN) >= buf->Length) {
2135 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL)
2136 return (AE_NO_MEMORY);
2137 bcopy(buf->Pointer, newp, buf->Length);
2138 rp = (ACPI_RESOURCE *)((u_int8_t *)newp +
2139 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer));
2140 AcpiOsFree(buf->Pointer);
2141 buf->Pointer = newp;
2142 buf->Length += buf->Length;
2145 /* Insert the new resource. */
2146 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA);
2148 /* And add the terminator. */
2149 rp = ACPI_NEXT_RESOURCE(rp);
2150 rp->Type = ACPI_RESOURCE_TYPE_END_TAG;
2157 * Set interrupt model.
2160 acpi_SetIntrModel(int model)
2163 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model));
2167 * DEPRECATED. This interface has serious deficiencies and will be
2170 * Immediately enter the sleep state. In the old model, acpiconf(8) ran
2171 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this.
2174 acpi_SetSleepState(struct acpi_softc *sc, int state)
2180 "warning: acpi_SetSleepState() deprecated, need to update your software\n");
2183 return (acpi_EnterSleepState(sc, state));
2187 acpi_sleep_force(void *arg)
2189 struct acpi_softc *sc;
2191 kprintf("acpi: suspend request timed out, forcing sleep now\n");
2193 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate)))
2194 kprintf("acpi: force sleep state S%d failed\n", sc->acpi_next_sstate);
2198 * Request that the system enter the given suspend state. All /dev/apm
2199 * devices and devd(8) will be notified. Userland then has a chance to
2200 * save state and acknowledge the request. The system sleeps once all
2204 acpi_ReqSleepState(struct acpi_softc *sc, int state)
2207 struct apm_clone_data *clone;
2210 if (state < ACPI_STATE_S1 || state > ACPI_STATE_S5)
2213 /* S5 (soft-off) should be entered directly with no waiting. */
2214 if (state == ACPI_STATE_S5) {
2215 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, state)))
2221 #if !defined(__i386__)
2222 /* This platform does not support acpi suspend/resume. */
2223 return (EOPNOTSUPP);
2226 /* If a suspend request is already in progress, just return. */
2228 if (sc->acpi_next_sstate != 0) {
2233 /* Record the pending state and notify all apm devices. */
2234 sc->acpi_next_sstate = state;
2236 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) {
2237 clone->notify_status = APM_EV_NONE;
2238 if ((clone->flags & ACPI_EVF_DEVD) == 0) {
2239 KNOTE(&clone->sel_read.si_note, 0);
2244 /* If devd(8) is not running, immediately enter the sleep state. */
2245 if (devctl_process_running() == FALSE) {
2247 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) {
2254 /* Now notify devd(8) also. */
2255 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state);
2258 * Set a timeout to fire if userland doesn't ack the suspend request
2259 * in time. This way we still eventually go to sleep if we were
2260 * overheating or running low on battery, even if userland is hung.
2261 * We cancel this timeout once all userland acks are in or the
2262 * suspend request is aborted.
2264 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc);
2270 * Acknowledge (or reject) a pending sleep state. The caller has
2271 * prepared for suspend and is now ready for it to proceed. If the
2272 * error argument is non-zero, it indicates suspend should be cancelled
2273 * and gives an errno value describing why. Once all votes are in,
2274 * we suspend the system.
2277 acpi_AckSleepState(struct apm_clone_data *clone, int error)
2279 struct acpi_softc *sc;
2282 #if !defined(__i386__)
2283 /* This platform does not support acpi suspend/resume. */
2284 return (EOPNOTSUPP);
2287 /* If no pending sleep state, return an error. */
2289 sc = clone->acpi_sc;
2290 if (sc->acpi_next_sstate == 0) {
2295 /* Caller wants to abort suspend process. */
2297 sc->acpi_next_sstate = 0;
2298 callout_stop(&sc->susp_force_to);
2299 kprintf("acpi: listener on %s cancelled the pending suspend\n",
2300 devtoname(clone->cdev));
2306 * Mark this device as acking the suspend request. Then, walk through
2307 * all devices, seeing if they agree yet. We only count devices that
2308 * are writable since read-only devices couldn't ack the request.
2310 clone->notify_status = APM_EV_ACKED;
2312 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) {
2313 if ((clone->flags & ACPI_EVF_WRITE) != 0 &&
2314 clone->notify_status != APM_EV_ACKED) {
2320 /* If all devices have voted "yes", we will suspend now. */
2322 callout_stop(&sc->susp_force_to);
2326 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate)))
2334 acpi_sleep_enable(void *arg)
2336 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0;
2339 enum acpi_sleep_state {
2342 ACPI_SS_DEV_SUSPEND,
2348 * Enter the desired system sleep state.
2350 * Currently we support S1-S5 but S4 is only S4BIOS
2353 acpi_EnterSleepState(struct acpi_softc *sc, int state)
2358 enum acpi_sleep_state slp_state;
2360 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
2362 /* Re-entry once we're suspending is not allowed. */
2365 if (sc->acpi_sleep_disabled) {
2367 kprintf("acpi: suspend request ignored (not ready yet)\n");
2370 sc->acpi_sleep_disabled = 1;
2374 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE
2375 * drivers need this.
2378 slp_state = ACPI_SS_NONE;
2384 status = AcpiGetSleepTypeData(state, &TypeA, &TypeB);
2385 if (status == AE_NOT_FOUND) {
2386 device_printf(sc->acpi_dev,
2387 "Sleep state S%d not supported by BIOS\n", state);
2389 } else if (ACPI_FAILURE(status)) {
2390 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n",
2391 AcpiFormatException(status));
2395 sc->acpi_sstate = state;
2397 /* Enable any GPEs as appropriate and requested by the user. */
2398 acpi_wake_prep_walk(state);
2399 slp_state = ACPI_SS_GPE_SET;
2402 * Inform all devices that we are going to sleep. If at least one
2403 * device fails, DEVICE_SUSPEND() automatically resumes the tree.
2405 * XXX Note that a better two-pass approach with a 'veto' pass
2406 * followed by a "real thing" pass would be better, but the current
2407 * bus interface does not provide for this.
2409 if (DEVICE_SUSPEND(root_bus) != 0) {
2410 device_printf(sc->acpi_dev, "device_suspend failed\n");
2413 slp_state = ACPI_SS_DEV_SUSPEND;
2415 /* If testing device suspend only, back out of everything here. */
2416 if (acpi_susp_bounce)
2419 status = AcpiEnterSleepStatePrep(state);
2420 if (ACPI_FAILURE(status)) {
2421 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n",
2422 AcpiFormatException(status));
2425 slp_state = ACPI_SS_SLP_PREP;
2427 if (sc->acpi_sleep_delay > 0)
2428 DELAY(sc->acpi_sleep_delay * 1000000);
2430 if (state != ACPI_STATE_S1) {
2431 acpi_sleep_machdep(sc, state);
2433 /* Re-enable ACPI hardware on wakeup from sleep state 4. */
2434 if (state == ACPI_STATE_S4)
2437 ACPI_DISABLE_IRQS();
2438 status = AcpiEnterSleepState(state);
2439 if (ACPI_FAILURE(status)) {
2440 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n",
2441 AcpiFormatException(status));
2445 slp_state = ACPI_SS_SLEPT;
2449 * Shut down cleanly and power off. This will call us back through the
2450 * shutdown handlers.
2452 shutdown_nice(RB_POWEROFF);
2456 status = AE_BAD_PARAMETER;
2461 * Back out state according to how far along we got in the suspend
2462 * process. This handles both the error and success cases.
2464 sc->acpi_next_sstate = 0;
2465 if (slp_state >= ACPI_SS_GPE_SET) {
2466 acpi_wake_prep_walk(state);
2467 sc->acpi_sstate = ACPI_STATE_S0;
2469 if (slp_state >= ACPI_SS_SLP_PREP)
2470 AcpiLeaveSleepState(state);
2471 if (slp_state >= ACPI_SS_DEV_SUSPEND)
2472 DEVICE_RESUME(root_bus);
2473 if (slp_state >= ACPI_SS_SLEPT)
2474 acpi_enable_fixed_events(sc);
2476 /* Allow another sleep request after a while. */
2477 /* XXX: needs timeout */
2478 if (state != ACPI_STATE_S5)
2479 acpi_sleep_enable(sc);
2481 /* Run /etc/rc.resume after we are back. */
2482 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state);
2485 return_ACPI_STATUS (status);
2488 /* Enable or disable the device's GPE. */
2490 acpi_wake_set_enable(device_t dev, int enable)
2492 struct acpi_prw_data prw;
2496 /* Make sure the device supports waking the system and get the GPE. */
2497 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0)
2500 flags = acpi_get_flags(dev);
2502 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit,
2504 if (ACPI_FAILURE(status)) {
2505 device_printf(dev, "enable wake failed\n");
2508 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED);
2510 status = AcpiSetGpeWakeMask(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 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_DISABLE);
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 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_ENABLE);
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,
2614 acpi_wake_prep, NULL, &sstate, NULL);
2619 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */
2621 acpi_wake_sysctl_walk(device_t dev)
2624 int error, i, numdevs;
2629 error = device_get_children(dev, &devlist, &numdevs);
2630 if (error != 0 || numdevs == 0) {
2632 kfree(devlist, M_TEMP);
2635 for (i = 0; i < numdevs; i++) {
2637 acpi_wake_sysctl_walk(child);
2638 if (!device_is_attached(child))
2640 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL);
2641 if (ACPI_SUCCESS(status)) {
2642 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child),
2643 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO,
2644 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0,
2645 acpi_wake_set_sysctl, "I", "Device set to wake the system");
2648 kfree(devlist, M_TEMP);
2655 /* Enable or disable wake from userland. */
2657 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS)
2662 dev = (device_t)arg1;
2663 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0;
2665 error = sysctl_handle_int(oidp, &enable, 0, req);
2666 if (error != 0 || req->newptr == NULL)
2668 if (enable != 0 && enable != 1)
2671 return (acpi_wake_set_enable(dev, enable));
2675 /* Parse a device's _PRW into a structure. */
2677 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw)
2680 ACPI_BUFFER prw_buffer;
2681 ACPI_OBJECT *res, *res2;
2682 int error, i, power_count;
2684 if (h == NULL || prw == NULL)
2688 * The _PRW object (7.2.9) is only required for devices that have the
2689 * ability to wake the system from a sleeping state.
2692 prw_buffer.Pointer = NULL;
2693 prw_buffer.Length = ACPI_ALLOCATE_BUFFER;
2694 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer);
2695 if (ACPI_FAILURE(status))
2697 res = (ACPI_OBJECT *)prw_buffer.Pointer;
2700 if (!ACPI_PKG_VALID(res, 2))
2704 * Element 1 of the _PRW object:
2705 * The lowest power system sleeping state that can be entered while still
2706 * providing wake functionality. The sleeping state being entered must
2707 * be less than (i.e., higher power) or equal to this value.
2709 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0)
2713 * Element 0 of the _PRW object:
2715 switch (res->Package.Elements[0].Type) {
2716 case ACPI_TYPE_INTEGER:
2718 * If the data type of this package element is numeric, then this
2719 * _PRW package element is the bit index in the GPEx_EN, in the
2720 * GPE blocks described in the FADT, of the enable bit that is
2721 * enabled for the wake event.
2723 prw->gpe_handle = NULL;
2724 prw->gpe_bit = res->Package.Elements[0].Integer.Value;
2727 case ACPI_TYPE_PACKAGE:
2729 * If the data type of this package element is a package, then this
2730 * _PRW package element is itself a package containing two
2731 * elements. The first is an object reference to the GPE Block
2732 * device that contains the GPE that will be triggered by the wake
2733 * event. The second element is numeric and it contains the bit
2734 * index in the GPEx_EN, in the GPE Block referenced by the
2735 * first element in the package, of the enable bit that is enabled for
2738 * For example, if this field is a package then it is of the form:
2739 * Package() {\_SB.PCI0.ISA.GPE, 2}
2741 res2 = &res->Package.Elements[0];
2742 if (!ACPI_PKG_VALID(res2, 2))
2744 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]);
2745 if (prw->gpe_handle == NULL)
2747 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0)
2755 /* Elements 2 to N of the _PRW object are power resources. */
2756 power_count = res->Package.Count - 2;
2757 if (power_count > ACPI_PRW_MAX_POWERRES) {
2758 kprintf("ACPI device %s has too many power resources\n", acpi_name(h));
2761 prw->power_res_count = power_count;
2762 for (i = 0; i < power_count; i++)
2763 prw->power_res[i] = res->Package.Elements[i];
2766 if (prw_buffer.Pointer != NULL)
2767 AcpiOsFree(prw_buffer.Pointer);
2772 * ACPI Event Handlers
2775 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */
2778 acpi_system_eventhandler_sleep(void *arg, int state)
2782 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
2784 /* Check if button action is disabled. */
2785 if (state == ACPI_S_STATES_MAX + 1)
2788 /* Request that the system prepare to enter the given suspend state. */
2789 ret = acpi_ReqSleepState((struct acpi_softc *)arg, state);
2791 kprintf("acpi: request to enter state S%d failed (err %d)\n",
2798 acpi_system_eventhandler_wakeup(void *arg, int state)
2801 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
2803 /* Currently, nothing to do for wakeup. */
2809 * ACPICA Event Handlers (FixedEvent, also called from button notify handler)
2812 acpi_event_power_button_sleep(void *context)
2814 struct acpi_softc *sc = (struct acpi_softc *)context;
2816 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
2818 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx);
2820 return_VALUE (ACPI_INTERRUPT_HANDLED);
2824 acpi_event_power_button_wake(void *context)
2826 struct acpi_softc *sc = (struct acpi_softc *)context;
2828 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
2830 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx);
2832 return_VALUE (ACPI_INTERRUPT_HANDLED);
2836 acpi_event_sleep_button_sleep(void *context)
2838 struct acpi_softc *sc = (struct acpi_softc *)context;
2840 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
2842 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx);
2844 return_VALUE (ACPI_INTERRUPT_HANDLED);
2848 acpi_event_sleep_button_wake(void *context)
2850 struct acpi_softc *sc = (struct acpi_softc *)context;
2852 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
2854 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx);
2856 return_VALUE (ACPI_INTERRUPT_HANDLED);
2860 * XXX This static buffer is suboptimal. There is no locking so only
2861 * use this for single-threaded callers.
2864 acpi_name(ACPI_HANDLE handle)
2867 static char data[256];
2869 buf.Length = sizeof(data);
2872 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf)))
2874 return ("(unknown)");
2878 * Debugging/bug-avoidance. Avoid trying to fetch info on various
2879 * parts of the namespace.
2882 acpi_avoid(ACPI_HANDLE handle)
2884 char *cp, *env, *np;
2887 np = acpi_name(handle);
2890 if ((env = kgetenv("debug.acpi.avoid")) == NULL)
2893 /* Scan the avoid list checking for a match */
2896 while (*cp != 0 && isspace(*cp))
2901 while (cp[len] != 0 && !isspace(cp[len]))
2903 if (!strncmp(cp, np, len)) {
2915 * Debugging/bug-avoidance. Disable ACPI subsystem components.
2918 acpi_disabled(char *subsys)
2923 if ((env = kgetenv("debug.acpi.disabled")) == NULL)
2925 if (strcmp(env, "all") == 0) {
2930 /* Scan the disable list, checking for a match. */
2933 while (*cp != '\0' && isspace(*cp))
2938 while (cp[len] != '\0' && !isspace(cp[len]))
2940 if (strncmp(cp, subsys, len) == 0) {
2952 * Debugging/bug-avoidance. Enable ACPI subsystem components. Most
2953 * components are enabled by default. The ones that are not have to be
2954 * enabled via debug.acpi.enabled.
2957 acpi_enabled(char *subsys)
2962 if ((env = kgetenv("debug.acpi.enabled")) == NULL)
2964 if (strcmp(env, "all") == 0) {
2969 /* Scan the enable list, checking for a match. */
2972 while (*cp != '\0' && isspace(*cp))
2977 while (cp[len] != '\0' && !isspace(cp[len]))
2979 if (strncmp(cp, subsys, len) == 0) {
2991 * Control interface.
2993 * We multiplex ioctls for all participating ACPI devices here. Individual
2994 * drivers wanting to be accessible via /dev/acpi should use the
2995 * register/deregister interface to make their handlers visible.
2997 struct acpi_ioctl_hook
2999 TAILQ_ENTRY(acpi_ioctl_hook) link;
3005 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks;
3006 static int acpi_ioctl_hooks_initted;
3009 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg)
3011 struct acpi_ioctl_hook *hp;
3013 if ((hp = kmalloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL)
3020 if (acpi_ioctl_hooks_initted == 0) {
3021 TAILQ_INIT(&acpi_ioctl_hooks);
3022 acpi_ioctl_hooks_initted = 1;
3024 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link);
3031 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn)
3033 struct acpi_ioctl_hook *hp;
3036 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link)
3037 if (hp->cmd == cmd && hp->fn == fn)
3041 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link);
3042 kfree(hp, M_ACPIDEV);
3048 acpiopen(struct dev_open_args *ap)
3054 acpiclose(struct dev_close_args *ap)
3060 acpiioctl(struct dev_ioctl_args *ap)
3062 struct acpi_softc *sc;
3063 struct acpi_ioctl_hook *hp;
3068 sc = ap->a_head.a_dev->si_drv1;
3071 * Scan the list of registered ioctls, looking for handlers.
3074 if (acpi_ioctl_hooks_initted)
3075 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) {
3076 if (hp->cmd == ap->a_cmd)
3081 return (hp->fn(ap->a_cmd, ap->a_data, hp->arg));
3084 * Core ioctls are not permitted for non-writable user.
3085 * Currently, other ioctls just fetch information.
3086 * Not changing system behavior.
3088 if ((ap->a_fflag & FWRITE) == 0)
3091 /* Core system ioctls. */
3092 switch (ap->a_cmd) {
3093 case ACPIIO_REQSLPSTATE:
3094 state = *(int *)ap->a_data;
3095 if (state != ACPI_STATE_S5)
3096 error = acpi_ReqSleepState(sc, state);
3098 kprintf("power off via acpi ioctl not supported\n");
3102 case ACPIIO_ACKSLPSTATE:
3105 error = *(int *)ap->a_data;
3106 error = acpi_AckSleepState(sc->acpi_clone, error);
3109 case ACPIIO_SETSLPSTATE: /* DEPRECATED */
3111 state = *(int *)ap->a_data;
3112 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX)
3113 if (ACPI_SUCCESS(acpi_SetSleepState(sc, state)))
3124 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
3128 UINT8 state, TypeA, TypeB;
3130 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND);
3131 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX + 1; state++)
3132 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB)))
3133 sbuf_printf(&sb, "S%d ", state);
3136 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req);
3142 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
3144 char sleep_state[10];
3146 u_int new_state, old_state;
3148 old_state = *(u_int *)oidp->oid_arg1;
3149 if (old_state > ACPI_S_STATES_MAX + 1)
3150 strlcpy(sleep_state, "unknown", sizeof(sleep_state));
3152 strlcpy(sleep_state, sleep_state_names[old_state], sizeof(sleep_state));
3153 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req);
3154 if (error == 0 && req->newptr != NULL) {
3155 new_state = ACPI_STATE_S0;
3156 for (; new_state <= ACPI_S_STATES_MAX + 1; new_state++)
3157 if (strcmp(sleep_state, sleep_state_names[new_state]) == 0)
3159 if (new_state <= ACPI_S_STATES_MAX + 1) {
3160 if (new_state != old_state)
3161 *(u_int *)oidp->oid_arg1 = new_state;
3169 /* Inform devctl(4) when we receive a Notify. */
3171 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify)
3173 char notify_buf[16];
3174 ACPI_BUFFER handle_buf;
3177 if (subsystem == NULL)
3180 handle_buf.Pointer = NULL;
3181 handle_buf.Length = ACPI_ALLOCATE_BUFFER;
3182 status = AcpiNsHandleToPathname(h, &handle_buf);
3183 if (ACPI_FAILURE(status))
3185 ksnprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify);
3186 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf);
3187 AcpiOsFree(handle_buf.Pointer);
3192 * Support for parsing debug options from the kernel environment.
3194 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers
3195 * by specifying the names of the bits in the debug.acpi.layer and
3196 * debug.acpi.level environment variables. Bits may be unset by
3197 * prefixing the bit name with !.
3205 static struct debugtag dbg_layer[] = {
3206 {"ACPI_UTILITIES", ACPI_UTILITIES},
3207 {"ACPI_HARDWARE", ACPI_HARDWARE},
3208 {"ACPI_EVENTS", ACPI_EVENTS},
3209 {"ACPI_TABLES", ACPI_TABLES},
3210 {"ACPI_NAMESPACE", ACPI_NAMESPACE},
3211 {"ACPI_PARSER", ACPI_PARSER},
3212 {"ACPI_DISPATCHER", ACPI_DISPATCHER},
3213 {"ACPI_EXECUTER", ACPI_EXECUTER},
3214 {"ACPI_RESOURCES", ACPI_RESOURCES},
3215 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER},
3216 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES},
3217 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER},
3218 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS},
3220 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER},
3221 {"ACPI_BATTERY", ACPI_BATTERY},
3222 {"ACPI_BUS", ACPI_BUS},
3223 {"ACPI_BUTTON", ACPI_BUTTON},
3224 {"ACPI_EC", ACPI_EC},
3225 {"ACPI_FAN", ACPI_FAN},
3226 {"ACPI_POWERRES", ACPI_POWERRES},
3227 {"ACPI_PROCESSOR", ACPI_PROCESSOR},
3228 {"ACPI_THERMAL", ACPI_THERMAL},
3229 {"ACPI_TIMER", ACPI_TIMER},
3230 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS},
3234 static struct debugtag dbg_level[] = {
3235 {"ACPI_LV_INIT", ACPI_LV_INIT},
3236 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT},
3237 {"ACPI_LV_INFO", ACPI_LV_INFO},
3238 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS},
3240 /* Trace verbosity level 1 [Standard Trace Level] */
3241 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES},
3242 {"ACPI_LV_PARSE", ACPI_LV_PARSE},
3243 {"ACPI_LV_LOAD", ACPI_LV_LOAD},
3244 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH},
3245 {"ACPI_LV_EXEC", ACPI_LV_EXEC},
3246 {"ACPI_LV_NAMES", ACPI_LV_NAMES},
3247 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION},
3248 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD},
3249 {"ACPI_LV_TABLES", ACPI_LV_TABLES},
3250 {"ACPI_LV_VALUES", ACPI_LV_VALUES},
3251 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS},
3252 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES},
3253 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS},
3254 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE},
3255 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1},
3257 /* Trace verbosity level 2 [Function tracing and memory allocation] */
3258 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS},
3259 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS},
3260 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS},
3261 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2},
3262 {"ACPI_LV_ALL", ACPI_LV_ALL},
3264 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */
3265 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX},
3266 {"ACPI_LV_THREADS", ACPI_LV_THREADS},
3267 {"ACPI_LV_IO", ACPI_LV_IO},
3268 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS},
3269 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3},
3271 /* Exceptionally verbose output -- also used in the global "DebugLevel" */
3272 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE},
3273 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO},
3274 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES},
3275 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS},
3276 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE},
3281 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag)
3293 while (*ep && !isspace(*ep))
3304 for (i = 0; tag[i].name != NULL; i++) {
3305 if (!strncmp(cp, tag[i].name, l)) {
3307 *flag |= tag[i].value;
3309 *flag &= ~tag[i].value;
3317 acpi_set_debugging(void *junk)
3319 char *layer, *level;
3326 layer = kgetenv("debug.acpi.layer");
3327 level = kgetenv("debug.acpi.level");
3328 if (layer == NULL && level == NULL)
3331 kprintf("ACPI set debug");
3332 if (layer != NULL) {
3333 if (strcmp("NONE", layer) != 0)
3334 kprintf(" layer '%s'", layer);
3335 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer);
3338 if (level != NULL) {
3339 if (strcmp("NONE", level) != 0)
3340 kprintf(" level '%s'", level);
3341 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel);
3347 SYSINIT(acpi_debugging, SI_BOOT1_TUNABLES, SI_ORDER_ANY, acpi_set_debugging,
3351 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS)
3354 struct debugtag *tag;
3357 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL)
3359 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) {
3360 tag = &dbg_layer[0];
3361 dbg = &AcpiDbgLayer;
3363 tag = &dbg_level[0];
3364 dbg = &AcpiDbgLevel;
3367 /* Get old values if this is a get request. */
3368 ACPI_SERIAL_BEGIN(acpi);
3370 sbuf_cpy(&sb, "NONE");
3371 } else if (req->newptr == NULL) {
3372 for (; tag->name != NULL; tag++) {
3373 if ((*dbg & tag->value) == tag->value)
3374 sbuf_printf(&sb, "%s ", tag->name);
3380 /* Copy out the old values to the user. */
3381 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb));
3384 /* If the user is setting a string, parse it. */
3385 if (error == 0 && req->newptr != NULL) {
3387 ksetenv((char *)oidp->oid_arg1, (char *)req->newptr);
3388 acpi_set_debugging(NULL);
3390 ACPI_SERIAL_END(acpi);
3395 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING,
3396 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", "");
3397 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING,
3398 "debug.acpi.level", 0, acpi_debug_sysctl, "A", "");
3399 #endif /* ACPI_DEBUG */
3402 acpi_pm_func(u_long cmd, void *arg, ...)
3404 int state, acpi_state;
3406 struct acpi_softc *sc;
3411 case POWER_CMD_SUSPEND:
3412 sc = (struct acpi_softc *)arg;
3419 state = va_arg(ap, int);
3423 case POWER_SLEEP_STATE_STANDBY:
3424 acpi_state = sc->acpi_standby_sx;
3426 case POWER_SLEEP_STATE_SUSPEND:
3427 acpi_state = sc->acpi_suspend_sx;
3429 case POWER_SLEEP_STATE_HIBERNATE:
3430 acpi_state = ACPI_STATE_S4;
3437 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state)))
3450 acpi_pm_register(void *arg)
3452 if (!cold || resource_disabled("acpi", 0))
3455 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL);
3458 SYSINIT(power, SI_BOOT2_KLD, SI_ORDER_ANY, acpi_pm_register, 0);