2 * Copyright (c) 2000 Takanori Watanabe <takawata@jp.freebsd.org>
3 * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.freebsd.org>
4 * Copyright (c) 2000, 2001 Michael Smith
5 * Copyright (c) 2000 BSDi
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
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
34 #include <sys/param.h>
35 #include <sys/kernel.h>
37 #include <sys/fcntl.h>
38 #include <sys/malloc.h>
39 #include <sys/module.h>
42 #include <sys/ioccom.h>
43 #include <sys/reboot.h>
44 #include <sys/sysctl.h>
45 #include <sys/ctype.h>
46 #include <sys/linker.h>
47 #include <sys/power.h>
49 #include <sys/sched.h>
51 #include <sys/timetc.h>
53 #if defined(__i386__) || defined(__amd64__)
54 #include <machine/pci_cfgreg.h>
56 #include <machine/resource.h>
57 #include <machine/bus.h>
59 #include <isa/isavar.h>
60 #include <isa/pnpvar.h>
62 #include <contrib/dev/acpica/include/acpi.h>
63 #include <contrib/dev/acpica/include/accommon.h>
64 #include <contrib/dev/acpica/include/acnamesp.h>
66 #include <dev/acpica/acpivar.h>
67 #include <dev/acpica/acpiio.h>
70 #include <dev/pci/pcivar.h>
71 #include <dev/pci/pci_private.h>
73 #include <vm/vm_param.h>
75 MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices");
77 /* Hooks for the ACPI CA debugging infrastructure */
78 #define _COMPONENT ACPI_BUS
79 ACPI_MODULE_NAME("ACPI")
81 static d_open_t acpiopen;
82 static d_close_t acpiclose;
83 static d_ioctl_t acpiioctl;
85 static struct cdevsw acpi_cdevsw = {
86 .d_version = D_VERSION,
93 struct acpi_interface {
98 /* Global mutex for locking access to the ACPI subsystem. */
99 struct mtx acpi_mutex;
101 /* Bitmap of device quirks. */
104 /* Supported sleep states. */
105 static BOOLEAN acpi_sleep_states[ACPI_S_STATE_COUNT];
107 static int acpi_modevent(struct module *mod, int event, void *junk);
108 static int acpi_probe(device_t dev);
109 static int acpi_attach(device_t dev);
110 static int acpi_suspend(device_t dev);
111 static int acpi_resume(device_t dev);
112 static int acpi_shutdown(device_t dev);
113 static device_t acpi_add_child(device_t bus, u_int order, const char *name,
115 static int acpi_print_child(device_t bus, device_t child);
116 static void acpi_probe_nomatch(device_t bus, device_t child);
117 static void acpi_driver_added(device_t dev, driver_t *driver);
118 static int acpi_read_ivar(device_t dev, device_t child, int index,
120 static int acpi_write_ivar(device_t dev, device_t child, int index,
122 static struct resource_list *acpi_get_rlist(device_t dev, device_t child);
123 static int acpi_sysres_alloc(device_t dev);
124 static struct resource *acpi_alloc_resource(device_t bus, device_t child,
125 int type, int *rid, u_long start, u_long end,
126 u_long count, u_int flags);
127 static int acpi_release_resource(device_t bus, device_t child, int type,
128 int rid, struct resource *r);
129 static void acpi_delete_resource(device_t bus, device_t child, int type,
131 static uint32_t acpi_isa_get_logicalid(device_t dev);
132 static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count);
133 static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids);
134 static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev,
135 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters,
137 static int acpi_device_pwr_for_sleep(device_t bus, device_t dev,
139 static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level,
140 void *context, void **retval);
141 static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev,
142 int max_depth, acpi_scan_cb_t user_fn, void *arg);
143 static int acpi_set_powerstate_method(device_t bus, device_t child,
145 static int acpi_isa_pnp_probe(device_t bus, device_t child,
146 struct isa_pnp_id *ids);
147 static void acpi_probe_children(device_t bus);
148 static void acpi_probe_order(ACPI_HANDLE handle, int *order);
149 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level,
150 void *context, void **status);
151 static void acpi_sleep_enable(void *arg);
152 static ACPI_STATUS acpi_sleep_disable(struct acpi_softc *sc);
153 static ACPI_STATUS acpi_EnterSleepState(struct acpi_softc *sc, int state);
154 static void acpi_shutdown_final(void *arg, int howto);
155 static void acpi_enable_fixed_events(struct acpi_softc *sc);
156 static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate);
157 static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate);
158 static int acpi_wake_prep_walk(int sstate);
159 static int acpi_wake_sysctl_walk(device_t dev);
160 static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS);
161 static void acpi_system_eventhandler_sleep(void *arg, int state);
162 static void acpi_system_eventhandler_wakeup(void *arg, int state);
163 static int acpi_sname2sstate(const char *sname);
164 static const char *acpi_sstate2sname(int sstate);
165 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS);
166 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS);
167 static int acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS);
168 static int acpi_pm_func(u_long cmd, void *arg, ...);
169 static int acpi_child_location_str_method(device_t acdev, device_t child,
170 char *buf, size_t buflen);
171 static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child,
172 char *buf, size_t buflen);
173 #if defined(__i386__) || defined(__amd64__)
174 static void acpi_enable_pcie(void);
176 static void acpi_hint_device_unit(device_t acdev, device_t child,
177 const char *name, int *unitp);
178 static void acpi_reset_interfaces(device_t dev);
180 static device_method_t acpi_methods[] = {
181 /* Device interface */
182 DEVMETHOD(device_probe, acpi_probe),
183 DEVMETHOD(device_attach, acpi_attach),
184 DEVMETHOD(device_shutdown, acpi_shutdown),
185 DEVMETHOD(device_detach, bus_generic_detach),
186 DEVMETHOD(device_suspend, acpi_suspend),
187 DEVMETHOD(device_resume, acpi_resume),
190 DEVMETHOD(bus_add_child, acpi_add_child),
191 DEVMETHOD(bus_print_child, acpi_print_child),
192 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch),
193 DEVMETHOD(bus_driver_added, acpi_driver_added),
194 DEVMETHOD(bus_read_ivar, acpi_read_ivar),
195 DEVMETHOD(bus_write_ivar, acpi_write_ivar),
196 DEVMETHOD(bus_get_resource_list, acpi_get_rlist),
197 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource),
198 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
199 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource),
200 DEVMETHOD(bus_release_resource, acpi_release_resource),
201 DEVMETHOD(bus_delete_resource, acpi_delete_resource),
202 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method),
203 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method),
204 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
205 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
206 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
207 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
208 DEVMETHOD(bus_hint_device_unit, acpi_hint_device_unit),
211 DEVMETHOD(acpi_id_probe, acpi_device_id_probe),
212 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj),
213 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep),
214 DEVMETHOD(acpi_scan_children, acpi_device_scan_children),
217 DEVMETHOD(pci_set_powerstate, acpi_set_powerstate_method),
220 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe),
225 static driver_t acpi_driver = {
228 sizeof(struct acpi_softc),
231 static devclass_t acpi_devclass;
232 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0);
233 MODULE_VERSION(acpi, 1);
235 ACPI_SERIAL_DECL(acpi, "ACPI root bus");
237 /* Local pools for managing system resources for ACPI child devices. */
238 static struct rman acpi_rman_io, acpi_rman_mem;
240 #define ACPI_MINIMUM_AWAKETIME 5
242 /* Holds the description of the acpi0 device. */
243 static char acpi_desc[ACPI_OEM_ID_SIZE + ACPI_OEM_TABLE_ID_SIZE + 2];
245 SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging");
246 static char acpi_ca_version[12];
247 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD,
248 acpi_ca_version, 0, "Version of Intel ACPI-CA");
251 * Allow overriding _OSI methods.
253 static char acpi_install_interface[256];
254 TUNABLE_STR("hw.acpi.install_interface", acpi_install_interface,
255 sizeof(acpi_install_interface));
256 static char acpi_remove_interface[256];
257 TUNABLE_STR("hw.acpi.remove_interface", acpi_remove_interface,
258 sizeof(acpi_remove_interface));
261 * Allow override of whether methods execute in parallel or not.
262 * Enable this for serial behavior, which fixes "AE_ALREADY_EXISTS"
263 * errors for AML that really can't handle parallel method execution.
264 * It is off by default since this breaks recursive methods and
265 * some IBMs use such code.
267 static int acpi_serialize_methods;
268 TUNABLE_INT("hw.acpi.serialize_methods", &acpi_serialize_methods);
270 /* Allow users to dump Debug objects without ACPI debugger. */
271 static int acpi_debug_objects;
272 TUNABLE_INT("debug.acpi.enable_debug_objects", &acpi_debug_objects);
273 SYSCTL_PROC(_debug_acpi, OID_AUTO, enable_debug_objects,
274 CTLFLAG_RW | CTLTYPE_INT, NULL, 0, acpi_debug_objects_sysctl, "I",
275 "Enable Debug objects");
277 /* Allow the interpreter to ignore common mistakes in BIOS. */
278 static int acpi_interpreter_slack = 1;
279 TUNABLE_INT("debug.acpi.interpreter_slack", &acpi_interpreter_slack);
280 SYSCTL_INT(_debug_acpi, OID_AUTO, interpreter_slack, CTLFLAG_RDTUN,
281 &acpi_interpreter_slack, 1, "Turn on interpreter slack mode.");
283 /* Power devices off and on in suspend and resume. XXX Remove once tested. */
284 static int acpi_do_powerstate = 1;
285 TUNABLE_INT("debug.acpi.do_powerstate", &acpi_do_powerstate);
286 SYSCTL_INT(_debug_acpi, OID_AUTO, do_powerstate, CTLFLAG_RW,
287 &acpi_do_powerstate, 1, "Turn off devices when suspending.");
289 /* Reset system clock while resuming. XXX Remove once tested. */
290 static int acpi_reset_clock = 1;
291 TUNABLE_INT("debug.acpi.reset_clock", &acpi_reset_clock);
292 SYSCTL_INT(_debug_acpi, OID_AUTO, reset_clock, CTLFLAG_RW,
293 &acpi_reset_clock, 1, "Reset system clock while resuming.");
295 /* Allow users to override quirks. */
296 TUNABLE_INT("debug.acpi.quirks", &acpi_quirks);
298 static int acpi_susp_bounce;
299 SYSCTL_INT(_debug_acpi, OID_AUTO, suspend_bounce, CTLFLAG_RW,
300 &acpi_susp_bounce, 0, "Don't actually suspend, just test devices.");
303 * ACPI can only be loaded as a module by the loader; activating it after
304 * system bootstrap time is not useful, and can be fatal to the system.
305 * It also cannot be unloaded, since the entire system bus hierarchy hangs
309 acpi_modevent(struct module *mod, int event, void *junk)
314 printf("The ACPI driver cannot be loaded after boot.\n");
319 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI)
329 * Perform early initialization.
334 static int started = 0;
338 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
340 /* Only run the startup code once. The MADT driver also calls this. */
342 return_VALUE (AE_OK);
346 * Pre-allocate space for RSDT/XSDT and DSDT tables and allow resizing
347 * if more tables exist.
349 if (ACPI_FAILURE(status = AcpiInitializeTables(NULL, 2, TRUE))) {
350 printf("ACPI: Table initialisation failed: %s\n",
351 AcpiFormatException(status));
352 return_VALUE (status);
355 /* Set up any quirks we have for this system. */
356 if (acpi_quirks == ACPI_Q_OK)
357 acpi_table_quirks(&acpi_quirks);
359 /* If the user manually set the disabled hint to 0, force-enable ACPI. */
360 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0)
361 acpi_quirks &= ~ACPI_Q_BROKEN;
362 if (acpi_quirks & ACPI_Q_BROKEN) {
363 printf("ACPI disabled by blacklist. Contact your BIOS vendor.\n");
367 return_VALUE (status);
371 * Detect ACPI and perform early initialisation.
376 ACPI_TABLE_RSDP *rsdp;
377 ACPI_TABLE_HEADER *rsdt;
378 ACPI_PHYSICAL_ADDRESS paddr;
381 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
386 /* Check that we haven't been disabled with a hint. */
387 if (resource_disabled("acpi", 0))
390 /* Check for other PM systems. */
391 if (power_pm_get_type() != POWER_PM_TYPE_NONE &&
392 power_pm_get_type() != POWER_PM_TYPE_ACPI) {
393 printf("ACPI identify failed, other PM system enabled.\n");
397 /* Initialize root tables. */
398 if (ACPI_FAILURE(acpi_Startup())) {
399 printf("ACPI: Try disabling either ACPI or apic support.\n");
403 if ((paddr = AcpiOsGetRootPointer()) == 0 ||
404 (rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP))) == NULL)
406 if (rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress != 0)
407 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress;
409 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress;
410 AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP));
412 if ((rsdt = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER))) == NULL)
414 sbuf_new(&sb, acpi_desc, sizeof(acpi_desc), SBUF_FIXEDLEN);
415 sbuf_bcat(&sb, rsdt->OemId, ACPI_OEM_ID_SIZE);
418 sbuf_bcat(&sb, rsdt->OemTableId, ACPI_OEM_TABLE_ID_SIZE);
422 AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER));
424 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%x", ACPI_CA_VERSION);
430 * Fetch some descriptive data from ACPI to put in our attach message.
433 acpi_probe(device_t dev)
436 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
438 device_set_desc(dev, acpi_desc);
444 acpi_attach(device_t dev)
446 struct acpi_softc *sc;
453 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
455 sc = device_get_softc(dev);
457 callout_init(&sc->susp_force_to, TRUE);
461 /* Initialize resource manager. */
462 acpi_rman_io.rm_type = RMAN_ARRAY;
463 acpi_rman_io.rm_start = 0;
464 acpi_rman_io.rm_end = 0xffff;
465 acpi_rman_io.rm_descr = "ACPI I/O ports";
466 if (rman_init(&acpi_rman_io) != 0)
467 panic("acpi rman_init IO ports failed");
468 acpi_rman_mem.rm_type = RMAN_ARRAY;
469 acpi_rman_mem.rm_start = 0;
470 acpi_rman_mem.rm_end = ~0ul;
471 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses";
472 if (rman_init(&acpi_rman_mem) != 0)
473 panic("acpi rman_init memory failed");
475 /* Initialise the ACPI mutex */
476 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF);
479 * Set the globals from our tunables. This is needed because ACPI-CA
480 * uses UINT8 for some values and we have no tunable_byte.
482 AcpiGbl_AllMethodsSerialized = acpi_serialize_methods ? TRUE : FALSE;
483 AcpiGbl_EnableInterpreterSlack = acpi_interpreter_slack ? TRUE : FALSE;
484 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE;
488 * Disable all debugging layers and levels.
494 /* Start up the ACPI CA subsystem. */
495 status = AcpiInitializeSubsystem();
496 if (ACPI_FAILURE(status)) {
497 device_printf(dev, "Could not initialize Subsystem: %s\n",
498 AcpiFormatException(status));
502 /* Override OS interfaces if the user requested. */
503 acpi_reset_interfaces(dev);
505 /* Load ACPI name space. */
506 status = AcpiLoadTables();
507 if (ACPI_FAILURE(status)) {
508 device_printf(dev, "Could not load Namespace: %s\n",
509 AcpiFormatException(status));
513 #if defined(__i386__) || defined(__amd64__)
514 /* Handle MCFG table if present. */
519 * Note that some systems (specifically, those with namespace evaluation
520 * issues that require the avoidance of parts of the namespace) must
521 * avoid running _INI and _STA on everything, as well as dodging the final
524 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT).
526 * XXX We should arrange for the object init pass after we have attached
527 * all our child devices, but on many systems it works here.
530 if (testenv("debug.acpi.avoid"))
531 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT;
533 /* Bring the hardware and basic handlers online. */
534 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) {
535 device_printf(dev, "Could not enable ACPI: %s\n",
536 AcpiFormatException(status));
541 * Call the ECDT probe function to provide EC functionality before
542 * the namespace has been evaluated.
544 * XXX This happens before the sysresource devices have been probed and
545 * attached so its resources come from nexus0. In practice, this isn't
546 * a problem but should be addressed eventually.
548 acpi_ec_ecdt_probe(dev);
550 /* Bring device objects and regions online. */
551 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) {
552 device_printf(dev, "Could not initialize ACPI objects: %s\n",
553 AcpiFormatException(status));
558 * Setup our sysctl tree.
560 * XXX: This doesn't check to make sure that none of these fail.
562 sysctl_ctx_init(&sc->acpi_sysctl_ctx);
563 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx,
564 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO,
565 device_get_name(dev), CTLFLAG_RD, 0, "");
566 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
567 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD,
568 0, 0, acpi_supported_sleep_state_sysctl, "A", "");
569 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
570 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW,
571 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", "");
572 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
573 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW,
574 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", "");
575 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
576 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW,
577 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", "");
578 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
579 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW,
580 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", "");
581 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
582 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW,
583 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", "");
584 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
585 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0,
587 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
588 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode");
589 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
590 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode");
591 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
592 OID_AUTO, "disable_on_reboot", CTLFLAG_RW,
593 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system");
594 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
595 OID_AUTO, "handle_reboot", CTLFLAG_RW,
596 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot");
599 * Default to 1 second before sleeping to give some machines time to
602 sc->acpi_sleep_delay = 1;
604 sc->acpi_verbose = 1;
605 if ((env = getenv("hw.acpi.verbose")) != NULL) {
606 if (strcmp(env, "0") != 0)
607 sc->acpi_verbose = 1;
611 /* Only enable reboot by default if the FADT says it is available. */
612 if (AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER)
613 sc->acpi_handle_reboot = 1;
615 /* Only enable S4BIOS by default if the FACS says it is available. */
616 if (AcpiGbl_FACS->Flags & ACPI_FACS_S4_BIOS_PRESENT)
619 /* Probe all supported sleep states. */
620 acpi_sleep_states[ACPI_STATE_S0] = TRUE;
621 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++)
622 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB)))
623 acpi_sleep_states[state] = TRUE;
626 * Dispatch the default sleep state to devices. The lid switch is set
627 * to UNKNOWN by default to avoid surprising users.
629 sc->acpi_power_button_sx = acpi_sleep_states[ACPI_STATE_S5] ?
630 ACPI_STATE_S5 : ACPI_STATE_UNKNOWN;
631 sc->acpi_lid_switch_sx = ACPI_STATE_UNKNOWN;
632 sc->acpi_standby_sx = acpi_sleep_states[ACPI_STATE_S1] ?
633 ACPI_STATE_S1 : ACPI_STATE_UNKNOWN;
634 sc->acpi_suspend_sx = acpi_sleep_states[ACPI_STATE_S3] ?
635 ACPI_STATE_S3 : ACPI_STATE_UNKNOWN;
637 /* Pick the first valid sleep state for the sleep button default. */
638 sc->acpi_sleep_button_sx = ACPI_STATE_UNKNOWN;
639 for (state = ACPI_STATE_S1; state <= ACPI_STATE_S4; state++)
640 if (acpi_sleep_states[state]) {
641 sc->acpi_sleep_button_sx = state;
645 acpi_enable_fixed_events(sc);
648 * Scan the namespace and attach/initialise children.
651 /* Register our shutdown handler. */
652 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc,
656 * Register our acpi event handlers.
657 * XXX should be configurable eg. via userland policy manager.
659 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep,
660 sc, ACPI_EVENT_PRI_LAST);
661 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup,
662 sc, ACPI_EVENT_PRI_LAST);
664 /* Flag our initial states. */
665 sc->acpi_enabled = TRUE;
666 sc->acpi_sstate = ACPI_STATE_S0;
667 sc->acpi_sleep_disabled = TRUE;
669 /* Create the control device */
670 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644,
672 sc->acpi_dev_t->si_drv1 = sc;
674 if ((error = acpi_machdep_init(dev)))
677 /* Register ACPI again to pass the correct argument of pm_func. */
678 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc);
680 if (!acpi_disabled("bus"))
681 acpi_probe_children(dev);
683 /* Allow sleep request after a while. */
684 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME);
689 return_VALUE (error);
693 acpi_suspend(device_t dev)
695 device_t child, *devlist;
696 int error, i, numdevs, pstate;
700 /* First give child devices a chance to suspend. */
701 error = bus_generic_suspend(dev);
706 * Now, set them into the appropriate power state, usually D3. If the
707 * device has an _SxD method for the next sleep state, use that power
710 error = device_get_children(dev, &devlist, &numdevs);
713 for (i = 0; i < numdevs; i++) {
714 /* If the device is not attached, we've powered it down elsewhere. */
716 if (!device_is_attached(child))
720 * Default to D3 for all sleep states. The _SxD method is optional
721 * so set the powerstate even if it's absent.
723 pstate = PCI_POWERSTATE_D3;
724 error = acpi_device_pwr_for_sleep(device_get_parent(child),
726 if ((error == 0 || error == ESRCH) && acpi_do_powerstate)
727 pci_set_powerstate(child, pstate);
729 free(devlist, M_TEMP);
736 acpi_resume(device_t dev)
739 int i, numdevs, error;
740 device_t child, *devlist;
745 * Put all devices in D0 before resuming them. Call _S0D on each one
746 * since some systems expect this.
748 error = device_get_children(dev, &devlist, &numdevs);
751 for (i = 0; i < numdevs; i++) {
753 handle = acpi_get_handle(child);
755 AcpiEvaluateObject(handle, "_S0D", NULL, NULL);
756 if (device_is_attached(child) && acpi_do_powerstate)
757 pci_set_powerstate(child, PCI_POWERSTATE_D0);
759 free(devlist, M_TEMP);
761 return (bus_generic_resume(dev));
765 acpi_shutdown(device_t dev)
770 /* Allow children to shutdown first. */
771 bus_generic_shutdown(dev);
774 * Enable any GPEs that are able to power-on the system (i.e., RTC).
775 * Also, disable any that are not valid for this state (most).
777 acpi_wake_prep_walk(ACPI_STATE_S5);
783 * Handle a new device being added
786 acpi_add_child(device_t bus, u_int order, const char *name, int unit)
788 struct acpi_device *ad;
791 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL)
794 resource_list_init(&ad->ad_rl);
796 child = device_add_child_ordered(bus, order, name, unit);
798 device_set_ivars(child, ad);
805 acpi_print_child(device_t bus, device_t child)
807 struct acpi_device *adev = device_get_ivars(child);
808 struct resource_list *rl = &adev->ad_rl;
811 retval += bus_print_child_header(bus, child);
812 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx");
813 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx");
814 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
815 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld");
816 if (device_get_flags(child))
817 retval += printf(" flags %#x", device_get_flags(child));
818 retval += bus_print_child_footer(bus, child);
824 * If this device is an ACPI child but no one claimed it, attempt
825 * to power it off. We'll power it back up when a driver is added.
827 * XXX Disabled for now since many necessary devices (like fdc and
828 * ATA) don't claim the devices we created for them but still expect
829 * them to be powered up.
832 acpi_probe_nomatch(device_t bus, device_t child)
834 #ifdef ACPI_ENABLE_POWERDOWN_NODRIVER
835 pci_set_powerstate(child, PCI_POWERSTATE_D3);
840 * If a new driver has a chance to probe a child, first power it up.
842 * XXX Disabled for now (see acpi_probe_nomatch for details).
845 acpi_driver_added(device_t dev, driver_t *driver)
847 device_t child, *devlist;
850 DEVICE_IDENTIFY(driver, dev);
851 if (device_get_children(dev, &devlist, &numdevs))
853 for (i = 0; i < numdevs; i++) {
855 if (device_get_state(child) == DS_NOTPRESENT) {
856 #ifdef ACPI_ENABLE_POWERDOWN_NODRIVER
857 pci_set_powerstate(child, PCI_POWERSTATE_D0);
858 if (device_probe_and_attach(child) != 0)
859 pci_set_powerstate(child, PCI_POWERSTATE_D3);
861 device_probe_and_attach(child);
865 free(devlist, M_TEMP);
868 /* Location hint for devctl(8) */
870 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf,
873 struct acpi_device *dinfo = device_get_ivars(child);
875 if (dinfo->ad_handle)
876 snprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle));
878 snprintf(buf, buflen, "unknown");
882 /* PnP information for devctl(8) */
884 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf,
887 struct acpi_device *dinfo = device_get_ivars(child);
888 ACPI_DEVICE_INFO *adinfo;
890 if (ACPI_FAILURE(AcpiGetObjectInfo(dinfo->ad_handle, &adinfo))) {
891 snprintf(buf, buflen, "unknown");
895 snprintf(buf, buflen, "_HID=%s _UID=%lu",
896 (adinfo->Valid & ACPI_VALID_HID) ?
897 adinfo->HardwareId.String : "none",
898 (adinfo->Valid & ACPI_VALID_UID) ?
899 strtoul(adinfo->UniqueId.String, NULL, 10) : 0UL);
906 * Handle per-device ivars
909 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
911 struct acpi_device *ad;
913 if ((ad = device_get_ivars(child)) == NULL) {
914 device_printf(child, "device has no ivars\n");
918 /* ACPI and ISA compatibility ivars */
920 case ACPI_IVAR_HANDLE:
921 *(ACPI_HANDLE *)result = ad->ad_handle;
923 case ACPI_IVAR_MAGIC:
924 *(uintptr_t *)result = ad->ad_magic;
926 case ACPI_IVAR_PRIVATE:
927 *(void **)result = ad->ad_private;
929 case ACPI_IVAR_FLAGS:
930 *(int *)result = ad->ad_flags;
932 case ISA_IVAR_VENDORID:
933 case ISA_IVAR_SERIAL:
934 case ISA_IVAR_COMPATID:
937 case ISA_IVAR_LOGICALID:
938 *(int *)result = acpi_isa_get_logicalid(child);
948 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value)
950 struct acpi_device *ad;
952 if ((ad = device_get_ivars(child)) == NULL) {
953 device_printf(child, "device has no ivars\n");
958 case ACPI_IVAR_HANDLE:
959 ad->ad_handle = (ACPI_HANDLE)value;
961 case ACPI_IVAR_MAGIC:
962 ad->ad_magic = (uintptr_t)value;
964 case ACPI_IVAR_PRIVATE:
965 ad->ad_private = (void *)value;
967 case ACPI_IVAR_FLAGS:
968 ad->ad_flags = (int)value;
971 panic("bad ivar write request (%d)", index);
979 * Handle child resource allocation/removal
981 static struct resource_list *
982 acpi_get_rlist(device_t dev, device_t child)
984 struct acpi_device *ad;
986 ad = device_get_ivars(child);
991 acpi_match_resource_hint(device_t dev, int type, long value)
993 struct acpi_device *ad = device_get_ivars(dev);
994 struct resource_list *rl = &ad->ad_rl;
995 struct resource_list_entry *rle;
997 STAILQ_FOREACH(rle, rl, link) {
998 if (rle->type != type)
1000 if (rle->start <= value && rle->end >= value)
1007 * Wire device unit numbers based on resource matches in hints.
1010 acpi_hint_device_unit(device_t acdev, device_t child, const char *name,
1015 int line, matches, unit;
1018 * Iterate over all the hints for the devices with the specified
1019 * name to see if one's resources are a subset of this device.
1023 if (resource_find_dev(&line, name, &unit, "at", NULL) != 0)
1026 /* Must have an "at" for acpi or isa. */
1027 resource_string_value(name, unit, "at", &s);
1028 if (!(strcmp(s, "acpi0") == 0 || strcmp(s, "acpi") == 0 ||
1029 strcmp(s, "isa0") == 0 || strcmp(s, "isa") == 0))
1033 * Check for matching resources. We must have at least one match.
1034 * Since I/O and memory resources cannot be shared, if we get a
1035 * match on either of those, ignore any mismatches in IRQs or DRQs.
1037 * XXX: We may want to revisit this to be more lenient and wire
1038 * as long as it gets one match.
1041 if (resource_long_value(name, unit, "port", &value) == 0) {
1043 * Floppy drive controllers are notorious for having a
1044 * wide variety of resources not all of which include the
1045 * first port that is specified by the hint (typically
1046 * 0x3f0) (see the comment above fdc_isa_alloc_resources()
1047 * in fdc_isa.c). However, they do all seem to include
1048 * port + 2 (e.g. 0x3f2) so for a floppy device, look for
1049 * 'value + 2' in the port resources instead of the hint
1052 if (strcmp(name, "fdc") == 0)
1054 if (acpi_match_resource_hint(child, SYS_RES_IOPORT, value))
1059 if (resource_long_value(name, unit, "maddr", &value) == 0) {
1060 if (acpi_match_resource_hint(child, SYS_RES_MEMORY, value))
1067 if (resource_long_value(name, unit, "irq", &value) == 0) {
1068 if (acpi_match_resource_hint(child, SYS_RES_IRQ, value))
1073 if (resource_long_value(name, unit, "drq", &value) == 0) {
1074 if (acpi_match_resource_hint(child, SYS_RES_DRQ, value))
1082 /* We have a winner! */
1090 * Pre-allocate/manage all memory and IO resources. Since rman can't handle
1091 * duplicates, we merge any in the sysresource attach routine.
1094 acpi_sysres_alloc(device_t dev)
1096 struct resource *res;
1097 struct resource_list *rl;
1098 struct resource_list_entry *rle;
1100 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL };
1105 * Probe/attach any sysresource devices. This would be unnecessary if we
1106 * had multi-pass probe/attach.
1108 if (device_get_children(dev, &children, &child_count) != 0)
1110 for (i = 0; i < child_count; i++) {
1111 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL)
1112 device_probe_and_attach(children[i]);
1114 free(children, M_TEMP);
1116 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev);
1117 STAILQ_FOREACH(rle, rl, link) {
1118 if (rle->res != NULL) {
1119 device_printf(dev, "duplicate resource for %lx\n", rle->start);
1123 /* Only memory and IO resources are valid here. */
1124 switch (rle->type) {
1125 case SYS_RES_IOPORT:
1128 case SYS_RES_MEMORY:
1129 rm = &acpi_rman_mem;
1135 /* Pre-allocate resource and add to our rman pool. */
1136 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type,
1137 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 0);
1139 rman_manage_region(rm, rman_get_start(res), rman_get_end(res));
1142 device_printf(dev, "reservation of %lx, %lx (%d) failed\n",
1143 rle->start, rle->count, rle->type);
1148 static struct resource *
1149 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid,
1150 u_long start, u_long end, u_long count, u_int flags)
1153 struct acpi_device *ad = device_get_ivars(child);
1154 struct resource_list *rl = &ad->ad_rl;
1155 struct resource_list_entry *rle;
1156 struct resource *res;
1161 /* We only handle memory and IO resources through rman. */
1163 case SYS_RES_IOPORT:
1166 case SYS_RES_MEMORY:
1167 rm = &acpi_rman_mem;
1173 ACPI_SERIAL_BEGIN(acpi);
1176 * If this is an allocation of the "default" range for a given RID, and
1177 * we know what the resources for this device are (i.e., they're on the
1178 * child's resource list), use those start/end values.
1180 if (bus == device_get_parent(child) && start == 0UL && end == ~0UL) {
1181 rle = resource_list_find(rl, type, *rid);
1190 * If this is an allocation of a specific range, see if we can satisfy
1191 * the request from our system resource regions. If we can't, pass the
1192 * request up to the parent.
1194 if (start + count - 1 == end && rm != NULL)
1195 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE,
1198 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid,
1199 start, end, count, flags);
1201 rman_set_rid(res, *rid);
1203 /* If requested, activate the resource using the parent's method. */
1204 if (flags & RF_ACTIVE)
1205 if (bus_activate_resource(child, type, *rid, res) != 0) {
1206 rman_release_resource(res);
1212 if (res != NULL && device_get_parent(child) == bus)
1216 * Since bus_config_intr() takes immediate effect, we cannot
1217 * configure the interrupt associated with a device when we
1218 * parse the resources but have to defer it until a driver
1219 * actually allocates the interrupt via bus_alloc_resource().
1221 * XXX: Should we handle the lookup failing?
1223 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares)))
1224 acpi_config_intr(child, &ares);
1229 ACPI_SERIAL_END(acpi);
1234 acpi_release_resource(device_t bus, device_t child, int type, int rid,
1240 /* We only handle memory and IO resources through rman. */
1242 case SYS_RES_IOPORT:
1245 case SYS_RES_MEMORY:
1246 rm = &acpi_rman_mem;
1252 ACPI_SERIAL_BEGIN(acpi);
1255 * If this resource belongs to one of our internal managers,
1256 * deactivate it and release it to the local pool. If it doesn't,
1257 * pass this request up to the parent.
1259 if (rm != NULL && rman_is_region_manager(r, rm)) {
1260 if (rman_get_flags(r) & RF_ACTIVE) {
1261 ret = bus_deactivate_resource(child, type, rid, r);
1265 ret = rman_release_resource(r);
1267 ret = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, type, rid, r);
1270 ACPI_SERIAL_END(acpi);
1275 acpi_delete_resource(device_t bus, device_t child, int type, int rid)
1277 struct resource_list *rl;
1279 rl = acpi_get_rlist(bus, child);
1280 resource_list_delete(rl, type, rid);
1283 /* Allocate an IO port or memory resource, given its GAS. */
1285 acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas,
1286 struct resource **res, u_int flags)
1288 int error, res_type;
1291 if (type == NULL || rid == NULL || gas == NULL || res == NULL)
1294 /* We only support memory and IO spaces. */
1295 switch (gas->SpaceId) {
1296 case ACPI_ADR_SPACE_SYSTEM_MEMORY:
1297 res_type = SYS_RES_MEMORY;
1299 case ACPI_ADR_SPACE_SYSTEM_IO:
1300 res_type = SYS_RES_IOPORT;
1303 return (EOPNOTSUPP);
1307 * If the register width is less than 8, assume the BIOS author means
1308 * it is a bit field and just allocate a byte.
1310 if (gas->BitWidth && gas->BitWidth < 8)
1313 /* Validate the address after we're sure we support the space. */
1314 if (gas->Address == 0 || gas->BitWidth == 0)
1317 bus_set_resource(dev, res_type, *rid, gas->Address,
1319 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags);
1324 bus_delete_resource(dev, res_type, *rid);
1329 /* Probe _HID and _CID for compatible ISA PNP ids. */
1331 acpi_isa_get_logicalid(device_t dev)
1333 ACPI_DEVICE_INFO *devinfo;
1337 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1339 /* Fetch and validate the HID. */
1340 if ((h = acpi_get_handle(dev)) == NULL ||
1341 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
1344 pnpid = (devinfo->Valid & ACPI_VALID_HID) != 0 &&
1345 devinfo->HardwareId.Length >= ACPI_EISAID_STRING_SIZE ?
1346 PNP_EISAID(devinfo->HardwareId.String) : 0;
1347 AcpiOsFree(devinfo);
1349 return_VALUE (pnpid);
1353 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count)
1355 ACPI_DEVICE_INFO *devinfo;
1356 ACPI_DEVICE_ID *ids;
1361 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1365 /* Fetch and validate the CID */
1366 if ((h = acpi_get_handle(dev)) == NULL ||
1367 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
1370 if ((devinfo->Valid & ACPI_VALID_CID) == 0) {
1371 AcpiOsFree(devinfo);
1375 if (devinfo->CompatibleIdList.Count < count)
1376 count = devinfo->CompatibleIdList.Count;
1377 ids = devinfo->CompatibleIdList.Ids;
1378 for (i = 0, valid = 0; i < count; i++)
1379 if (ids[i].Length >= ACPI_EISAID_STRING_SIZE &&
1380 strncmp(ids[i].String, "PNP", 3) == 0) {
1381 *pnpid++ = PNP_EISAID(ids[i].String);
1384 AcpiOsFree(devinfo);
1386 return_VALUE (valid);
1390 acpi_device_id_probe(device_t bus, device_t dev, char **ids)
1396 h = acpi_get_handle(dev);
1397 if (ids == NULL || h == NULL)
1399 t = acpi_get_type(dev);
1400 if (t != ACPI_TYPE_DEVICE && t != ACPI_TYPE_PROCESSOR)
1403 /* Try to match one of the array of IDs with a HID or CID. */
1404 for (i = 0; ids[i] != NULL; i++) {
1405 if (acpi_MatchHid(h, ids[i]))
1412 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname,
1413 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret)
1418 h = ACPI_ROOT_OBJECT;
1419 else if ((h = acpi_get_handle(dev)) == NULL)
1420 return (AE_BAD_PARAMETER);
1421 return (AcpiEvaluateObject(h, pathname, parameters, ret));
1425 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate)
1427 struct acpi_softc *sc;
1433 sc = device_get_softc(bus);
1434 handle = acpi_get_handle(dev);
1437 * XXX If we find these devices, don't try to power them down.
1438 * The serial and IRDA ports on my T23 hang the system when
1439 * set to D3 and it appears that such legacy devices may
1440 * need special handling in their drivers.
1442 if (handle == NULL ||
1443 acpi_MatchHid(handle, "PNP0500") ||
1444 acpi_MatchHid(handle, "PNP0501") ||
1445 acpi_MatchHid(handle, "PNP0502") ||
1446 acpi_MatchHid(handle, "PNP0510") ||
1447 acpi_MatchHid(handle, "PNP0511"))
1451 * Override next state with the value from _SxD, if present. If no
1452 * dstate argument was provided, don't fetch the return value.
1454 snprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate);
1456 status = acpi_GetInteger(handle, sxd, dstate);
1458 status = AcpiEvaluateObject(handle, sxd, NULL, NULL);
1475 /* Callback arg for our implementation of walking the namespace. */
1476 struct acpi_device_scan_ctx {
1477 acpi_scan_cb_t user_fn;
1483 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval)
1485 struct acpi_device_scan_ctx *ctx;
1486 device_t dev, old_dev;
1488 ACPI_OBJECT_TYPE type;
1491 * Skip this device if we think we'll have trouble with it or it is
1492 * the parent where the scan began.
1494 ctx = (struct acpi_device_scan_ctx *)arg;
1495 if (acpi_avoid(h) || h == ctx->parent)
1498 /* If this is not a valid device type (e.g., a method), skip it. */
1499 if (ACPI_FAILURE(AcpiGetType(h, &type)))
1501 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR &&
1502 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER)
1506 * Call the user function with the current device. If it is unchanged
1507 * afterwards, return. Otherwise, we update the handle to the new dev.
1509 old_dev = acpi_get_device(h);
1511 status = ctx->user_fn(h, &dev, level, ctx->arg);
1512 if (ACPI_FAILURE(status) || old_dev == dev)
1515 /* Remove the old child and its connection to the handle. */
1516 if (old_dev != NULL) {
1517 device_delete_child(device_get_parent(old_dev), old_dev);
1518 AcpiDetachData(h, acpi_fake_objhandler);
1521 /* Recreate the handle association if the user created a device. */
1523 AcpiAttachData(h, acpi_fake_objhandler, dev);
1529 acpi_device_scan_children(device_t bus, device_t dev, int max_depth,
1530 acpi_scan_cb_t user_fn, void *arg)
1533 struct acpi_device_scan_ctx ctx;
1535 if (acpi_disabled("children"))
1539 h = ACPI_ROOT_OBJECT;
1540 else if ((h = acpi_get_handle(dev)) == NULL)
1541 return (AE_BAD_PARAMETER);
1542 ctx.user_fn = user_fn;
1545 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth,
1546 acpi_device_scan_cb, NULL, &ctx, NULL));
1550 * Even though ACPI devices are not PCI, we use the PCI approach for setting
1551 * device power states since it's close enough to ACPI.
1554 acpi_set_powerstate_method(device_t bus, device_t child, int state)
1561 h = acpi_get_handle(child);
1562 if (state < ACPI_STATE_D0 || state > ACPI_D_STATES_MAX)
1567 /* Ignore errors if the power methods aren't present. */
1568 status = acpi_pwr_switch_consumer(h, state);
1569 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND
1570 && status != AE_BAD_PARAMETER)
1571 device_printf(bus, "failed to set ACPI power state D%d on %s: %s\n",
1572 state, acpi_name(h), AcpiFormatException(status));
1578 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids)
1580 int result, cid_count, i;
1581 uint32_t lid, cids[8];
1583 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1586 * ISA-style drivers attached to ACPI may persist and
1587 * probe manually if we return ENOENT. We never want
1588 * that to happen, so don't ever return it.
1592 /* Scan the supplied IDs for a match */
1593 lid = acpi_isa_get_logicalid(child);
1594 cid_count = acpi_isa_get_compatid(child, cids, 8);
1595 while (ids && ids->ip_id) {
1596 if (lid == ids->ip_id) {
1600 for (i = 0; i < cid_count; i++) {
1601 if (cids[i] == ids->ip_id) {
1610 if (result == 0 && ids->ip_desc)
1611 device_set_desc(child, ids->ip_desc);
1613 return_VALUE (result);
1616 #if defined(__i386__) || defined(__amd64__)
1618 * Look for a MCFG table. If it is present, use the settings for
1619 * domain (segment) 0 to setup PCI config space access via the memory
1623 acpi_enable_pcie(void)
1625 ACPI_TABLE_HEADER *hdr;
1626 ACPI_MCFG_ALLOCATION *alloc, *end;
1629 status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr);
1630 if (ACPI_FAILURE(status))
1633 end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length);
1634 alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1);
1635 while (alloc < end) {
1636 if (alloc->PciSegment == 0) {
1637 pcie_cfgregopen(alloc->Address, alloc->StartBusNumber,
1638 alloc->EndBusNumber);
1647 * Scan all of the ACPI namespace and attach child devices.
1649 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and
1650 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec.
1651 * However, in violation of the spec, some systems place their PCI link
1652 * devices in \, so we have to walk the whole namespace. We check the
1653 * type of namespace nodes, so this should be ok.
1656 acpi_probe_children(device_t bus)
1659 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1662 * Scan the namespace and insert placeholders for all the devices that
1663 * we find. We also probe/attach any early devices.
1665 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because
1666 * we want to create nodes for all devices, not just those that are
1667 * currently present. (This assumes that we don't want to create/remove
1668 * devices as they appear, which might be smarter.)
1670 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n"));
1671 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, acpi_probe_child,
1674 /* Pre-allocate resources for our rman from any sysresource devices. */
1675 acpi_sysres_alloc(bus);
1677 /* Create any static children by calling device identify methods. */
1678 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n"));
1679 bus_generic_probe(bus);
1681 /* Probe/attach all children, created staticly and from the namespace. */
1682 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "acpi bus_generic_attach\n"));
1683 bus_generic_attach(bus);
1685 /* Attach wake sysctls. */
1686 acpi_wake_sysctl_walk(bus);
1688 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n"));
1693 * Determine the probe order for a given device.
1696 acpi_probe_order(ACPI_HANDLE handle, int *order)
1698 ACPI_OBJECT_TYPE type;
1702 * 2. I/O port and memory system resource holders
1703 * 3. Embedded controllers (to handle early accesses)
1704 * 4. PCI Link Devices
1706 AcpiGetType(handle, &type);
1707 if (type == ACPI_TYPE_PROCESSOR)
1709 else if (acpi_MatchHid(handle, "PNP0C01") || acpi_MatchHid(handle, "PNP0C02"))
1711 else if (acpi_MatchHid(handle, "PNP0C09"))
1713 else if (acpi_MatchHid(handle, "PNP0C0F"))
1718 * Evaluate a child device and determine whether we might attach a device to
1722 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status)
1724 ACPI_OBJECT_TYPE type;
1726 device_t bus, child;
1730 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1732 if (acpi_disabled("children"))
1733 return_ACPI_STATUS (AE_OK);
1735 /* Skip this device if we think we'll have trouble with it. */
1736 if (acpi_avoid(handle))
1737 return_ACPI_STATUS (AE_OK);
1739 bus = (device_t)context;
1740 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) {
1741 handle_str = acpi_name(handle);
1743 case ACPI_TYPE_DEVICE:
1745 * Since we scan from \, be sure to skip system scope objects.
1746 * \_SB_ and \_TZ_ are defined in ACPICA as devices to work around
1747 * BIOS bugs. For example, \_SB_ is to allow \_SB_._INI to be run
1748 * during the intialization and \_TZ_ is to support Notify() on it.
1750 if (strcmp(handle_str, "\\_SB_") == 0 ||
1751 strcmp(handle_str, "\\_TZ_") == 0)
1754 case ACPI_TYPE_PROCESSOR:
1755 case ACPI_TYPE_THERMAL:
1756 case ACPI_TYPE_POWER:
1758 * Create a placeholder device for this node. Sort the
1759 * placeholder so that the probe/attach passes will run
1760 * breadth-first. Orders less than ACPI_DEV_BASE_ORDER
1761 * are reserved for special objects (i.e., system
1764 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str));
1765 order = level * 10 + 100;
1766 acpi_probe_order(handle, &order);
1767 child = BUS_ADD_CHILD(bus, order, NULL, -1);
1771 /* Associate the handle with the device_t and vice versa. */
1772 acpi_set_handle(child, handle);
1773 AcpiAttachData(handle, acpi_fake_objhandler, child);
1776 * Check that the device is present. If it's not present,
1777 * leave it disabled (so that we have a device_t attached to
1778 * the handle, but we don't probe it).
1780 * XXX PCI link devices sometimes report "present" but not
1781 * "functional" (i.e. if disabled). Go ahead and probe them
1782 * anyway since we may enable them later.
1784 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) {
1785 /* Never disable PCI link devices. */
1786 if (acpi_MatchHid(handle, "PNP0C0F"))
1789 * Docking stations should remain enabled since the system
1790 * may be undocked at boot.
1792 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h)))
1795 device_disable(child);
1800 * Get the device's resource settings and attach them.
1801 * Note that if the device has _PRS but no _CRS, we need
1802 * to decide when it's appropriate to try to configure the
1803 * device. Ignore the return value here; it's OK for the
1804 * device not to have any resources.
1806 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL);
1811 return_ACPI_STATUS (AE_OK);
1815 * AcpiAttachData() requires an object handler but never uses it. This is a
1816 * placeholder object handler so we can store a device_t in an ACPI_HANDLE.
1819 acpi_fake_objhandler(ACPI_HANDLE h, void *data)
1824 acpi_shutdown_final(void *arg, int howto)
1826 struct acpi_softc *sc = (struct acpi_softc *)arg;
1830 * XXX Shutdown code should only run on the BSP (cpuid 0).
1831 * Some chipsets do not power off the system correctly if called from
1834 if ((howto & RB_POWEROFF) != 0) {
1835 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5);
1836 if (ACPI_FAILURE(status)) {
1837 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n",
1838 AcpiFormatException(status));
1841 device_printf(sc->acpi_dev, "Powering system off\n");
1842 ACPI_DISABLE_IRQS();
1843 status = AcpiEnterSleepState(ACPI_STATE_S5);
1844 if (ACPI_FAILURE(status))
1845 device_printf(sc->acpi_dev, "power-off failed - %s\n",
1846 AcpiFormatException(status));
1849 device_printf(sc->acpi_dev, "power-off failed - timeout\n");
1851 } else if ((howto & RB_HALT) == 0 && sc->acpi_handle_reboot) {
1852 /* Reboot using the reset register. */
1853 status = AcpiReset();
1854 if (ACPI_SUCCESS(status)) {
1856 device_printf(sc->acpi_dev, "reset failed - timeout\n");
1857 } else if (status != AE_NOT_EXIST)
1858 device_printf(sc->acpi_dev, "reset failed - %s\n",
1859 AcpiFormatException(status));
1860 } else if (sc->acpi_do_disable && panicstr == NULL) {
1862 * Only disable ACPI if the user requested. On some systems, writing
1863 * the disable value to SMI_CMD hangs the system.
1865 device_printf(sc->acpi_dev, "Shutting down\n");
1871 acpi_enable_fixed_events(struct acpi_softc *sc)
1873 static int first_time = 1;
1875 /* Enable and clear fixed events and install handlers. */
1876 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) {
1877 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON);
1878 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON,
1879 acpi_event_power_button_sleep, sc);
1881 device_printf(sc->acpi_dev, "Power Button (fixed)\n");
1883 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) {
1884 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON);
1885 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON,
1886 acpi_event_sleep_button_sleep, sc);
1888 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n");
1895 * Returns true if the device is actually present and should
1896 * be attached to. This requires the present, enabled, UI-visible
1897 * and diagnostics-passed bits to be set.
1900 acpi_DeviceIsPresent(device_t dev)
1902 ACPI_DEVICE_INFO *devinfo;
1906 if ((h = acpi_get_handle(dev)) == NULL ||
1907 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
1910 /* If no _STA method, must be present */
1911 present = (devinfo->Valid & ACPI_VALID_STA) == 0 ||
1912 ACPI_DEVICE_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE;
1914 AcpiOsFree(devinfo);
1919 * Returns true if the battery is actually present and inserted.
1922 acpi_BatteryIsPresent(device_t dev)
1924 ACPI_DEVICE_INFO *devinfo;
1928 if ((h = acpi_get_handle(dev)) == NULL ||
1929 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
1932 /* If no _STA method, must be present */
1933 present = (devinfo->Valid & ACPI_VALID_STA) == 0 ||
1934 ACPI_BATTERY_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE;
1936 AcpiOsFree(devinfo);
1941 * Match a HID string against a handle
1944 acpi_MatchHid(ACPI_HANDLE h, const char *hid)
1946 ACPI_DEVICE_INFO *devinfo;
1950 if (hid == NULL || h == NULL ||
1951 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
1955 if ((devinfo->Valid & ACPI_VALID_HID) != 0 &&
1956 strcmp(hid, devinfo->HardwareId.String) == 0)
1958 else if ((devinfo->Valid & ACPI_VALID_CID) != 0)
1959 for (i = 0; i < devinfo->CompatibleIdList.Count; i++) {
1960 if (strcmp(hid, devinfo->CompatibleIdList.Ids[i].String) == 0) {
1966 AcpiOsFree(devinfo);
1971 * Return the handle of a named object within our scope, ie. that of (parent)
1972 * or one if its parents.
1975 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result)
1980 /* Walk back up the tree to the root */
1982 status = AcpiGetHandle(parent, path, &r);
1983 if (ACPI_SUCCESS(status)) {
1987 /* XXX Return error here? */
1988 if (status != AE_NOT_FOUND)
1990 if (ACPI_FAILURE(AcpiGetParent(parent, &r)))
1991 return (AE_NOT_FOUND);
1996 /* Find the difference between two PM tick counts. */
1998 acpi_TimerDelta(uint32_t end, uint32_t start)
2003 delta = end - start;
2004 else if (AcpiGbl_FADT.Flags & ACPI_FADT_32BIT_TIMER)
2005 delta = ((0xFFFFFFFF - start) + end + 1);
2007 delta = ((0x00FFFFFF - start) + end + 1) & 0x00FFFFFF;
2012 * Allocate a buffer with a preset data size.
2015 acpi_AllocBuffer(int size)
2019 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL)
2022 buf->Pointer = (void *)(buf + 1);
2027 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number)
2030 ACPI_OBJECT_LIST args;
2032 arg1.Type = ACPI_TYPE_INTEGER;
2033 arg1.Integer.Value = number;
2035 args.Pointer = &arg1;
2037 return (AcpiEvaluateObject(handle, path, &args, NULL));
2041 * Evaluate a path that should return an integer.
2044 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number)
2051 handle = ACPI_ROOT_OBJECT;
2054 * Assume that what we've been pointed at is an Integer object, or
2055 * a method that will return an Integer.
2057 buf.Pointer = ¶m;
2058 buf.Length = sizeof(param);
2059 status = AcpiEvaluateObject(handle, path, NULL, &buf);
2060 if (ACPI_SUCCESS(status)) {
2061 if (param.Type == ACPI_TYPE_INTEGER)
2062 *number = param.Integer.Value;
2068 * In some applications, a method that's expected to return an Integer
2069 * may instead return a Buffer (probably to simplify some internal
2070 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer,
2071 * convert it into an Integer as best we can.
2075 if (status == AE_BUFFER_OVERFLOW) {
2076 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) {
2077 status = AE_NO_MEMORY;
2079 status = AcpiEvaluateObject(handle, path, NULL, &buf);
2080 if (ACPI_SUCCESS(status))
2081 status = acpi_ConvertBufferToInteger(&buf, number);
2082 AcpiOsFree(buf.Pointer);
2089 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number)
2095 p = (ACPI_OBJECT *)bufp->Pointer;
2096 if (p->Type == ACPI_TYPE_INTEGER) {
2097 *number = p->Integer.Value;
2100 if (p->Type != ACPI_TYPE_BUFFER)
2102 if (p->Buffer.Length > sizeof(int))
2103 return (AE_BAD_DATA);
2106 val = p->Buffer.Pointer;
2107 for (i = 0; i < p->Buffer.Length; i++)
2108 *number += val[i] << (i * 8);
2113 * Iterate over the elements of an a package object, calling the supplied
2114 * function for each element.
2116 * XXX possible enhancement might be to abort traversal on error.
2119 acpi_ForeachPackageObject(ACPI_OBJECT *pkg,
2120 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg)
2125 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE)
2126 return (AE_BAD_PARAMETER);
2128 /* Iterate over components */
2130 comp = pkg->Package.Elements;
2131 for (; i < pkg->Package.Count; i++, comp++)
2138 * Find the (index)th resource object in a set.
2141 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp)
2146 rp = (ACPI_RESOURCE *)buf->Pointer;
2150 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length))
2151 return (AE_BAD_PARAMETER);
2153 /* Check for terminator */
2154 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0)
2155 return (AE_NOT_FOUND);
2156 rp = ACPI_NEXT_RESOURCE(rp);
2165 * Append an ACPI_RESOURCE to an ACPI_BUFFER.
2167 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER
2168 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible
2169 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of
2172 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512
2175 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res)
2180 /* Initialise the buffer if necessary. */
2181 if (buf->Pointer == NULL) {
2182 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE;
2183 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL)
2184 return (AE_NO_MEMORY);
2185 rp = (ACPI_RESOURCE *)buf->Pointer;
2186 rp->Type = ACPI_RESOURCE_TYPE_END_TAG;
2193 * Scan the current buffer looking for the terminator.
2194 * This will either find the terminator or hit the end
2195 * of the buffer and return an error.
2197 rp = (ACPI_RESOURCE *)buf->Pointer;
2199 /* Range check, don't go outside the buffer */
2200 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length))
2201 return (AE_BAD_PARAMETER);
2202 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0)
2204 rp = ACPI_NEXT_RESOURCE(rp);
2208 * Check the size of the buffer and expand if required.
2211 * size of existing resources before terminator +
2212 * size of new resource and header +
2213 * size of terminator.
2215 * Note that this loop should really only run once, unless
2216 * for some reason we are stuffing a *really* huge resource.
2218 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) +
2219 res->Length + ACPI_RS_SIZE_NO_DATA +
2220 ACPI_RS_SIZE_MIN) >= buf->Length) {
2221 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL)
2222 return (AE_NO_MEMORY);
2223 bcopy(buf->Pointer, newp, buf->Length);
2224 rp = (ACPI_RESOURCE *)((u_int8_t *)newp +
2225 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer));
2226 AcpiOsFree(buf->Pointer);
2227 buf->Pointer = newp;
2228 buf->Length += buf->Length;
2231 /* Insert the new resource. */
2232 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA);
2234 /* And add the terminator. */
2235 rp = ACPI_NEXT_RESOURCE(rp);
2236 rp->Type = ACPI_RESOURCE_TYPE_END_TAG;
2243 * Set interrupt model.
2246 acpi_SetIntrModel(int model)
2249 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model));
2253 * Walk subtables of a table and call a callback routine for each
2254 * subtable. The caller should provide the first subtable and a
2255 * pointer to the end of the table. This can be used to walk tables
2256 * such as MADT and SRAT that use subtable entries.
2259 acpi_walk_subtables(void *first, void *end, acpi_subtable_handler *handler,
2262 ACPI_SUBTABLE_HEADER *entry;
2264 for (entry = first; (void *)entry < end; ) {
2265 /* Avoid an infinite loop if we hit a bogus entry. */
2266 if (entry->Length < sizeof(ACPI_SUBTABLE_HEADER))
2269 handler(entry, arg);
2270 entry = ACPI_ADD_PTR(ACPI_SUBTABLE_HEADER, entry, entry->Length);
2275 * DEPRECATED. This interface has serious deficiencies and will be
2278 * Immediately enter the sleep state. In the old model, acpiconf(8) ran
2279 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this.
2282 acpi_SetSleepState(struct acpi_softc *sc, int state)
2287 device_printf(sc->acpi_dev,
2288 "warning: acpi_SetSleepState() deprecated, need to update your software\n");
2291 return (acpi_EnterSleepState(sc, state));
2294 #if defined(__amd64__) || defined(__i386__)
2296 acpi_sleep_force(void *arg)
2298 struct acpi_softc *sc = (struct acpi_softc *)arg;
2300 device_printf(sc->acpi_dev,
2301 "suspend request timed out, forcing sleep now\n");
2302 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate)))
2303 device_printf(sc->acpi_dev, "force sleep state S%d failed\n",
2304 sc->acpi_next_sstate);
2309 * Request that the system enter the given suspend state. All /dev/apm
2310 * devices and devd(8) will be notified. Userland then has a chance to
2311 * save state and acknowledge the request. The system sleeps once all
2315 acpi_ReqSleepState(struct acpi_softc *sc, int state)
2317 #if defined(__amd64__) || defined(__i386__)
2318 #if defined(__i386__)
2319 struct apm_clone_data *clone;
2323 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX)
2325 if (!acpi_sleep_states[state])
2326 return (EOPNOTSUPP);
2330 /* If a suspend request is already in progress, just return. */
2331 if (sc->acpi_next_sstate != 0) {
2336 /* S5 (soft-off) should be entered directly with no waiting. */
2337 if (state == ACPI_STATE_S5) {
2339 status = acpi_EnterSleepState(sc, state);
2340 return (ACPI_SUCCESS(status) ? 0 : ENXIO);
2343 /* Record the pending state and notify all apm devices. */
2344 sc->acpi_next_sstate = state;
2345 #if defined(__i386__)
2346 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) {
2347 clone->notify_status = APM_EV_NONE;
2348 if ((clone->flags & ACPI_EVF_DEVD) == 0) {
2349 selwakeuppri(&clone->sel_read, PZERO);
2350 KNOTE_LOCKED(&clone->sel_read.si_note, 0);
2355 /* If devd(8) is not running, immediately enter the sleep state. */
2356 if (!devctl_process_running()) {
2358 status = acpi_EnterSleepState(sc, state);
2359 return (ACPI_SUCCESS(status) ? 0 : ENXIO);
2363 * Set a timeout to fire if userland doesn't ack the suspend request
2364 * in time. This way we still eventually go to sleep if we were
2365 * overheating or running low on battery, even if userland is hung.
2366 * We cancel this timeout once all userland acks are in or the
2367 * suspend request is aborted.
2369 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc);
2372 /* Now notify devd(8) also. */
2373 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state);
2377 /* This platform does not support acpi suspend/resume. */
2378 return (EOPNOTSUPP);
2383 * Acknowledge (or reject) a pending sleep state. The caller has
2384 * prepared for suspend and is now ready for it to proceed. If the
2385 * error argument is non-zero, it indicates suspend should be cancelled
2386 * and gives an errno value describing why. Once all votes are in,
2387 * we suspend the system.
2390 acpi_AckSleepState(struct apm_clone_data *clone, int error)
2392 #if defined(__amd64__) || defined(__i386__)
2393 struct acpi_softc *sc;
2396 /* If no pending sleep state, return an error. */
2398 sc = clone->acpi_sc;
2399 if (sc->acpi_next_sstate == 0) {
2404 /* Caller wants to abort suspend process. */
2406 sc->acpi_next_sstate = 0;
2407 callout_stop(&sc->susp_force_to);
2408 device_printf(sc->acpi_dev,
2409 "listener on %s cancelled the pending suspend\n",
2410 devtoname(clone->cdev));
2416 * Mark this device as acking the suspend request. Then, walk through
2417 * all devices, seeing if they agree yet. We only count devices that
2418 * are writable since read-only devices couldn't ack the request.
2421 #if defined(__i386__)
2422 clone->notify_status = APM_EV_ACKED;
2423 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) {
2424 if ((clone->flags & ACPI_EVF_WRITE) != 0 &&
2425 clone->notify_status != APM_EV_ACKED) {
2432 /* If all devices have voted "yes", we will suspend now. */
2434 callout_stop(&sc->susp_force_to);
2438 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate)))
2443 /* This platform does not support acpi suspend/resume. */
2444 return (EOPNOTSUPP);
2449 acpi_sleep_enable(void *arg)
2451 struct acpi_softc *sc = (struct acpi_softc *)arg;
2453 /* Reschedule if the system is not fully up and running. */
2454 if (!AcpiGbl_SystemAwakeAndRunning) {
2455 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME);
2460 sc->acpi_sleep_disabled = FALSE;
2465 acpi_sleep_disable(struct acpi_softc *sc)
2469 /* Fail if the system is not fully up and running. */
2470 if (!AcpiGbl_SystemAwakeAndRunning)
2474 status = sc->acpi_sleep_disabled ? AE_ERROR : AE_OK;
2475 sc->acpi_sleep_disabled = TRUE;
2481 enum acpi_sleep_state {
2484 ACPI_SS_DEV_SUSPEND,
2490 * Enter the desired system sleep state.
2492 * Currently we support S1-S5 but S4 is only S4BIOS
2495 acpi_EnterSleepState(struct acpi_softc *sc, int state)
2498 enum acpi_sleep_state slp_state;
2500 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
2502 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX)
2503 return_ACPI_STATUS (AE_BAD_PARAMETER);
2504 if (!acpi_sleep_states[state]) {
2505 device_printf(sc->acpi_dev, "Sleep state S%d not supported by BIOS\n",
2507 return (AE_SUPPORT);
2510 /* Re-entry once we're suspending is not allowed. */
2511 status = acpi_sleep_disable(sc);
2512 if (ACPI_FAILURE(status)) {
2513 device_printf(sc->acpi_dev,
2514 "suspend request ignored (not ready yet)\n");
2518 if (state == ACPI_STATE_S5) {
2520 * Shut down cleanly and power off. This will call us back through the
2521 * shutdown handlers.
2523 shutdown_nice(RB_POWEROFF);
2524 return_ACPI_STATUS (AE_OK);
2528 thread_lock(curthread);
2529 sched_bind(curthread, 0);
2530 thread_unlock(curthread);
2534 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE
2535 * drivers need this.
2539 slp_state = ACPI_SS_NONE;
2541 sc->acpi_sstate = state;
2543 /* Enable any GPEs as appropriate and requested by the user. */
2544 acpi_wake_prep_walk(state);
2545 slp_state = ACPI_SS_GPE_SET;
2548 * Inform all devices that we are going to sleep. If at least one
2549 * device fails, DEVICE_SUSPEND() automatically resumes the tree.
2551 * XXX Note that a better two-pass approach with a 'veto' pass
2552 * followed by a "real thing" pass would be better, but the current
2553 * bus interface does not provide for this.
2555 if (DEVICE_SUSPEND(root_bus) != 0) {
2556 device_printf(sc->acpi_dev, "device_suspend failed\n");
2559 slp_state = ACPI_SS_DEV_SUSPEND;
2561 /* If testing device suspend only, back out of everything here. */
2562 if (acpi_susp_bounce)
2565 status = AcpiEnterSleepStatePrep(state);
2566 if (ACPI_FAILURE(status)) {
2567 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n",
2568 AcpiFormatException(status));
2571 slp_state = ACPI_SS_SLP_PREP;
2573 if (sc->acpi_sleep_delay > 0)
2574 DELAY(sc->acpi_sleep_delay * 1000000);
2576 if (state != ACPI_STATE_S1) {
2577 acpi_sleep_machdep(sc, state);
2579 /* Re-enable ACPI hardware on wakeup from sleep state 4. */
2580 if (state == ACPI_STATE_S4)
2583 ACPI_DISABLE_IRQS();
2584 status = AcpiEnterSleepState(state);
2585 if (ACPI_FAILURE(status)) {
2586 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n",
2587 AcpiFormatException(status));
2591 slp_state = ACPI_SS_SLEPT;
2594 * Back out state according to how far along we got in the suspend
2595 * process. This handles both the error and success cases.
2598 if (slp_state >= ACPI_SS_GPE_SET) {
2599 acpi_wake_prep_walk(state);
2600 sc->acpi_sstate = ACPI_STATE_S0;
2602 if (slp_state >= ACPI_SS_SLP_PREP)
2603 AcpiLeaveSleepState(state);
2604 if (slp_state >= ACPI_SS_DEV_SUSPEND)
2605 DEVICE_RESUME(root_bus);
2606 if (slp_state >= ACPI_SS_SLEPT)
2607 acpi_enable_fixed_events(sc);
2608 sc->acpi_next_sstate = 0;
2613 thread_lock(curthread);
2614 sched_unbind(curthread);
2615 thread_unlock(curthread);
2618 /* Allow another sleep request after a while. */
2619 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME);
2621 /* Run /etc/rc.resume after we are back. */
2622 if (devctl_process_running())
2623 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state);
2625 return_ACPI_STATUS (status);
2629 acpi_resync_clock(struct acpi_softc *sc)
2632 if (!acpi_reset_clock)
2636 * Warm up timecounter again and reset system clock.
2638 (void)timecounter->tc_get_timecount(timecounter);
2639 (void)timecounter->tc_get_timecount(timecounter);
2640 inittodr(time_second + sc->acpi_sleep_delay);
2643 /* Enable or disable the device's wake GPE. */
2645 acpi_wake_set_enable(device_t dev, int enable)
2647 struct acpi_prw_data prw;
2651 /* Make sure the device supports waking the system and get the GPE. */
2652 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0)
2655 flags = acpi_get_flags(dev);
2657 status = AcpiGpeWakeup(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_ENABLE);
2658 if (ACPI_FAILURE(status)) {
2659 device_printf(dev, "enable wake failed\n");
2662 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED);
2664 status = AcpiGpeWakeup(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_DISABLE);
2665 if (ACPI_FAILURE(status)) {
2666 device_printf(dev, "disable wake failed\n");
2669 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED);
2676 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate)
2678 struct acpi_prw_data prw;
2681 /* Check that this is a wake-capable device and get its GPE. */
2682 if (acpi_parse_prw(handle, &prw) != 0)
2684 dev = acpi_get_device(handle);
2687 * The destination sleep state must be less than (i.e., higher power)
2688 * or equal to the value specified by _PRW. If this GPE cannot be
2689 * enabled for the next sleep state, then disable it. If it can and
2690 * the user requested it be enabled, turn on any required power resources
2693 if (sstate > prw.lowest_wake) {
2694 AcpiGpeWakeup(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_DISABLE);
2696 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n",
2697 acpi_name(handle), sstate);
2698 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) {
2699 acpi_pwr_wake_enable(handle, 1);
2700 acpi_SetInteger(handle, "_PSW", 1);
2702 device_printf(dev, "wake_prep enabled for %s (S%d)\n",
2703 acpi_name(handle), sstate);
2710 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate)
2712 struct acpi_prw_data prw;
2716 * Check that this is a wake-capable device and get its GPE. Return
2717 * now if the user didn't enable this device for wake.
2719 if (acpi_parse_prw(handle, &prw) != 0)
2721 dev = acpi_get_device(handle);
2722 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0)
2726 * If this GPE couldn't be enabled for the previous sleep state, it was
2727 * disabled before going to sleep so re-enable it. If it was enabled,
2728 * clear _PSW and turn off any power resources it used.
2730 if (sstate > prw.lowest_wake) {
2731 AcpiGpeWakeup(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_ENABLE);
2733 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle));
2735 acpi_SetInteger(handle, "_PSW", 0);
2736 acpi_pwr_wake_enable(handle, 0);
2738 device_printf(dev, "run_prep cleaned up for %s\n",
2746 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status)
2750 /* If suspending, run the sleep prep function, otherwise wake. */
2751 sstate = *(int *)context;
2752 if (AcpiGbl_SystemAwakeAndRunning)
2753 acpi_wake_sleep_prep(handle, sstate);
2755 acpi_wake_run_prep(handle, sstate);
2759 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */
2761 acpi_wake_prep_walk(int sstate)
2763 ACPI_HANDLE sb_handle;
2765 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle)))
2766 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100,
2767 acpi_wake_prep, NULL, &sstate, NULL);
2771 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */
2773 acpi_wake_sysctl_walk(device_t dev)
2775 int error, i, numdevs;
2780 error = device_get_children(dev, &devlist, &numdevs);
2781 if (error != 0 || numdevs == 0) {
2783 free(devlist, M_TEMP);
2786 for (i = 0; i < numdevs; i++) {
2788 acpi_wake_sysctl_walk(child);
2789 if (!device_is_attached(child))
2791 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL);
2792 if (ACPI_SUCCESS(status)) {
2793 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child),
2794 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO,
2795 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0,
2796 acpi_wake_set_sysctl, "I", "Device set to wake the system");
2799 free(devlist, M_TEMP);
2804 /* Enable or disable wake from userland. */
2806 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS)
2811 dev = (device_t)arg1;
2812 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0;
2814 error = sysctl_handle_int(oidp, &enable, 0, req);
2815 if (error != 0 || req->newptr == NULL)
2817 if (enable != 0 && enable != 1)
2820 return (acpi_wake_set_enable(dev, enable));
2823 /* Parse a device's _PRW into a structure. */
2825 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw)
2828 ACPI_BUFFER prw_buffer;
2829 ACPI_OBJECT *res, *res2;
2830 int error, i, power_count;
2832 if (h == NULL || prw == NULL)
2836 * The _PRW object (7.2.9) is only required for devices that have the
2837 * ability to wake the system from a sleeping state.
2840 prw_buffer.Pointer = NULL;
2841 prw_buffer.Length = ACPI_ALLOCATE_BUFFER;
2842 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer);
2843 if (ACPI_FAILURE(status))
2845 res = (ACPI_OBJECT *)prw_buffer.Pointer;
2848 if (!ACPI_PKG_VALID(res, 2))
2852 * Element 1 of the _PRW object:
2853 * The lowest power system sleeping state that can be entered while still
2854 * providing wake functionality. The sleeping state being entered must
2855 * be less than (i.e., higher power) or equal to this value.
2857 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0)
2861 * Element 0 of the _PRW object:
2863 switch (res->Package.Elements[0].Type) {
2864 case ACPI_TYPE_INTEGER:
2866 * If the data type of this package element is numeric, then this
2867 * _PRW package element is the bit index in the GPEx_EN, in the
2868 * GPE blocks described in the FADT, of the enable bit that is
2869 * enabled for the wake event.
2871 prw->gpe_handle = NULL;
2872 prw->gpe_bit = res->Package.Elements[0].Integer.Value;
2875 case ACPI_TYPE_PACKAGE:
2877 * If the data type of this package element is a package, then this
2878 * _PRW package element is itself a package containing two
2879 * elements. The first is an object reference to the GPE Block
2880 * device that contains the GPE that will be triggered by the wake
2881 * event. The second element is numeric and it contains the bit
2882 * index in the GPEx_EN, in the GPE Block referenced by the
2883 * first element in the package, of the enable bit that is enabled for
2886 * For example, if this field is a package then it is of the form:
2887 * Package() {\_SB.PCI0.ISA.GPE, 2}
2889 res2 = &res->Package.Elements[0];
2890 if (!ACPI_PKG_VALID(res2, 2))
2892 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]);
2893 if (prw->gpe_handle == NULL)
2895 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0)
2903 /* Elements 2 to N of the _PRW object are power resources. */
2904 power_count = res->Package.Count - 2;
2905 if (power_count > ACPI_PRW_MAX_POWERRES) {
2906 printf("ACPI device %s has too many power resources\n", acpi_name(h));
2909 prw->power_res_count = power_count;
2910 for (i = 0; i < power_count; i++)
2911 prw->power_res[i] = res->Package.Elements[i];
2914 if (prw_buffer.Pointer != NULL)
2915 AcpiOsFree(prw_buffer.Pointer);
2920 * ACPI Event Handlers
2923 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */
2926 acpi_system_eventhandler_sleep(void *arg, int state)
2928 struct acpi_softc *sc = (struct acpi_softc *)arg;
2931 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
2933 /* Check if button action is disabled or unknown. */
2934 if (state == ACPI_STATE_UNKNOWN)
2937 /* Request that the system prepare to enter the given suspend state. */
2938 ret = acpi_ReqSleepState(sc, state);
2940 device_printf(sc->acpi_dev,
2941 "request to enter state S%d failed (err %d)\n", state, ret);
2947 acpi_system_eventhandler_wakeup(void *arg, int state)
2950 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
2952 /* Currently, nothing to do for wakeup. */
2958 * ACPICA Event Handlers (FixedEvent, also called from button notify handler)
2961 acpi_event_power_button_sleep(void *context)
2963 struct acpi_softc *sc = (struct acpi_softc *)context;
2965 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
2967 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx);
2969 return_VALUE (ACPI_INTERRUPT_HANDLED);
2973 acpi_event_power_button_wake(void *context)
2975 struct acpi_softc *sc = (struct acpi_softc *)context;
2977 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
2979 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx);
2981 return_VALUE (ACPI_INTERRUPT_HANDLED);
2985 acpi_event_sleep_button_sleep(void *context)
2987 struct acpi_softc *sc = (struct acpi_softc *)context;
2989 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
2991 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx);
2993 return_VALUE (ACPI_INTERRUPT_HANDLED);
2997 acpi_event_sleep_button_wake(void *context)
2999 struct acpi_softc *sc = (struct acpi_softc *)context;
3001 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
3003 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx);
3005 return_VALUE (ACPI_INTERRUPT_HANDLED);
3009 * XXX This static buffer is suboptimal. There is no locking so only
3010 * use this for single-threaded callers.
3013 acpi_name(ACPI_HANDLE handle)
3016 static char data[256];
3018 buf.Length = sizeof(data);
3021 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf)))
3023 return ("(unknown)");
3027 * Debugging/bug-avoidance. Avoid trying to fetch info on various
3028 * parts of the namespace.
3031 acpi_avoid(ACPI_HANDLE handle)
3033 char *cp, *env, *np;
3036 np = acpi_name(handle);
3039 if ((env = getenv("debug.acpi.avoid")) == NULL)
3042 /* Scan the avoid list checking for a match */
3045 while (*cp != 0 && isspace(*cp))
3050 while (cp[len] != 0 && !isspace(cp[len]))
3052 if (!strncmp(cp, np, len)) {
3064 * Debugging/bug-avoidance. Disable ACPI subsystem components.
3067 acpi_disabled(char *subsys)
3072 if ((env = getenv("debug.acpi.disabled")) == NULL)
3074 if (strcmp(env, "all") == 0) {
3079 /* Scan the disable list, checking for a match. */
3082 while (*cp != '\0' && isspace(*cp))
3087 while (cp[len] != '\0' && !isspace(cp[len]))
3089 if (strncmp(cp, subsys, len) == 0) {
3101 * Control interface.
3103 * We multiplex ioctls for all participating ACPI devices here. Individual
3104 * drivers wanting to be accessible via /dev/acpi should use the
3105 * register/deregister interface to make their handlers visible.
3107 struct acpi_ioctl_hook
3109 TAILQ_ENTRY(acpi_ioctl_hook) link;
3115 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks;
3116 static int acpi_ioctl_hooks_initted;
3119 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg)
3121 struct acpi_ioctl_hook *hp;
3123 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL)
3130 if (acpi_ioctl_hooks_initted == 0) {
3131 TAILQ_INIT(&acpi_ioctl_hooks);
3132 acpi_ioctl_hooks_initted = 1;
3134 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link);
3141 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn)
3143 struct acpi_ioctl_hook *hp;
3146 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link)
3147 if (hp->cmd == cmd && hp->fn == fn)
3151 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link);
3152 free(hp, M_ACPIDEV);
3158 acpiopen(struct cdev *dev, int flag, int fmt, struct thread *td)
3164 acpiclose(struct cdev *dev, int flag, int fmt, struct thread *td)
3170 acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
3172 struct acpi_softc *sc;
3173 struct acpi_ioctl_hook *hp;
3181 * Scan the list of registered ioctls, looking for handlers.
3184 if (acpi_ioctl_hooks_initted)
3185 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) {
3191 return (hp->fn(cmd, addr, hp->arg));
3194 * Core ioctls are not permitted for non-writable user.
3195 * Currently, other ioctls just fetch information.
3196 * Not changing system behavior.
3198 if ((flag & FWRITE) == 0)
3201 /* Core system ioctls. */
3203 case ACPIIO_REQSLPSTATE:
3204 state = *(int *)addr;
3205 if (state != ACPI_STATE_S5)
3206 return (acpi_ReqSleepState(sc, state));
3207 device_printf(sc->acpi_dev, "power off via acpi ioctl not supported\n");
3210 case ACPIIO_ACKSLPSTATE:
3211 error = *(int *)addr;
3212 error = acpi_AckSleepState(sc->acpi_clone, error);
3214 case ACPIIO_SETSLPSTATE: /* DEPRECATED */
3215 state = *(int *)addr;
3216 if (state < ACPI_STATE_S0 || state > ACPI_S_STATES_MAX)
3218 if (!acpi_sleep_states[state])
3219 return (EOPNOTSUPP);
3220 if (ACPI_FAILURE(acpi_SetSleepState(sc, state)))
3232 acpi_sname2sstate(const char *sname)
3236 if (toupper(sname[0]) == 'S') {
3237 sstate = sname[1] - '0';
3238 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5 &&
3241 } else if (strcasecmp(sname, "NONE") == 0)
3242 return (ACPI_STATE_UNKNOWN);
3247 acpi_sstate2sname(int sstate)
3249 static const char *snames[] = { "S0", "S1", "S2", "S3", "S4", "S5" };
3251 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5)
3252 return (snames[sstate]);
3253 else if (sstate == ACPI_STATE_UNKNOWN)
3259 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
3265 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND);
3266 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++)
3267 if (acpi_sleep_states[state])
3268 sbuf_printf(&sb, "%s ", acpi_sstate2sname(state));
3271 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req);
3277 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
3279 char sleep_state[10];
3280 int error, new_state, old_state;
3282 old_state = *(int *)oidp->oid_arg1;
3283 strlcpy(sleep_state, acpi_sstate2sname(old_state), sizeof(sleep_state));
3284 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req);
3285 if (error == 0 && req->newptr != NULL) {
3286 new_state = acpi_sname2sstate(sleep_state);
3287 if (new_state < ACPI_STATE_S1)
3289 if (new_state < ACPI_S_STATE_COUNT && !acpi_sleep_states[new_state])
3290 return (EOPNOTSUPP);
3291 if (new_state != old_state)
3292 *(int *)oidp->oid_arg1 = new_state;
3297 /* Inform devctl(4) when we receive a Notify. */
3299 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify)
3301 char notify_buf[16];
3302 ACPI_BUFFER handle_buf;
3305 if (subsystem == NULL)
3308 handle_buf.Pointer = NULL;
3309 handle_buf.Length = ACPI_ALLOCATE_BUFFER;
3310 status = AcpiNsHandleToPathname(h, &handle_buf);
3311 if (ACPI_FAILURE(status))
3313 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify);
3314 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf);
3315 AcpiOsFree(handle_buf.Pointer);
3320 * Support for parsing debug options from the kernel environment.
3322 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers
3323 * by specifying the names of the bits in the debug.acpi.layer and
3324 * debug.acpi.level environment variables. Bits may be unset by
3325 * prefixing the bit name with !.
3333 static struct debugtag dbg_layer[] = {
3334 {"ACPI_UTILITIES", ACPI_UTILITIES},
3335 {"ACPI_HARDWARE", ACPI_HARDWARE},
3336 {"ACPI_EVENTS", ACPI_EVENTS},
3337 {"ACPI_TABLES", ACPI_TABLES},
3338 {"ACPI_NAMESPACE", ACPI_NAMESPACE},
3339 {"ACPI_PARSER", ACPI_PARSER},
3340 {"ACPI_DISPATCHER", ACPI_DISPATCHER},
3341 {"ACPI_EXECUTER", ACPI_EXECUTER},
3342 {"ACPI_RESOURCES", ACPI_RESOURCES},
3343 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER},
3344 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES},
3345 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER},
3346 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS},
3348 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER},
3349 {"ACPI_BATTERY", ACPI_BATTERY},
3350 {"ACPI_BUS", ACPI_BUS},
3351 {"ACPI_BUTTON", ACPI_BUTTON},
3352 {"ACPI_EC", ACPI_EC},
3353 {"ACPI_FAN", ACPI_FAN},
3354 {"ACPI_POWERRES", ACPI_POWERRES},
3355 {"ACPI_PROCESSOR", ACPI_PROCESSOR},
3356 {"ACPI_THERMAL", ACPI_THERMAL},
3357 {"ACPI_TIMER", ACPI_TIMER},
3358 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS},
3362 static struct debugtag dbg_level[] = {
3363 {"ACPI_LV_INIT", ACPI_LV_INIT},
3364 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT},
3365 {"ACPI_LV_INFO", ACPI_LV_INFO},
3366 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS},
3368 /* Trace verbosity level 1 [Standard Trace Level] */
3369 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES},
3370 {"ACPI_LV_PARSE", ACPI_LV_PARSE},
3371 {"ACPI_LV_LOAD", ACPI_LV_LOAD},
3372 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH},
3373 {"ACPI_LV_EXEC", ACPI_LV_EXEC},
3374 {"ACPI_LV_NAMES", ACPI_LV_NAMES},
3375 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION},
3376 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD},
3377 {"ACPI_LV_TABLES", ACPI_LV_TABLES},
3378 {"ACPI_LV_VALUES", ACPI_LV_VALUES},
3379 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS},
3380 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES},
3381 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS},
3382 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE},
3383 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1},
3385 /* Trace verbosity level 2 [Function tracing and memory allocation] */
3386 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS},
3387 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS},
3388 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS},
3389 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2},
3390 {"ACPI_LV_ALL", ACPI_LV_ALL},
3392 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */
3393 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX},
3394 {"ACPI_LV_THREADS", ACPI_LV_THREADS},
3395 {"ACPI_LV_IO", ACPI_LV_IO},
3396 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS},
3397 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3},
3399 /* Exceptionally verbose output -- also used in the global "DebugLevel" */
3400 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE},
3401 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO},
3402 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES},
3403 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS},
3404 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE},
3409 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag)
3421 while (*ep && !isspace(*ep))
3432 for (i = 0; tag[i].name != NULL; i++) {
3433 if (!strncmp(cp, tag[i].name, l)) {
3435 *flag |= tag[i].value;
3437 *flag &= ~tag[i].value;
3445 acpi_set_debugging(void *junk)
3447 char *layer, *level;
3454 layer = getenv("debug.acpi.layer");
3455 level = getenv("debug.acpi.level");
3456 if (layer == NULL && level == NULL)
3459 printf("ACPI set debug");
3460 if (layer != NULL) {
3461 if (strcmp("NONE", layer) != 0)
3462 printf(" layer '%s'", layer);
3463 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer);
3466 if (level != NULL) {
3467 if (strcmp("NONE", level) != 0)
3468 printf(" level '%s'", level);
3469 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel);
3475 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging,
3479 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS)
3482 struct debugtag *tag;
3485 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL)
3487 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) {
3488 tag = &dbg_layer[0];
3489 dbg = &AcpiDbgLayer;
3491 tag = &dbg_level[0];
3492 dbg = &AcpiDbgLevel;
3495 /* Get old values if this is a get request. */
3496 ACPI_SERIAL_BEGIN(acpi);
3498 sbuf_cpy(&sb, "NONE");
3499 } else if (req->newptr == NULL) {
3500 for (; tag->name != NULL; tag++) {
3501 if ((*dbg & tag->value) == tag->value)
3502 sbuf_printf(&sb, "%s ", tag->name);
3508 /* Copy out the old values to the user. */
3509 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb));
3512 /* If the user is setting a string, parse it. */
3513 if (error == 0 && req->newptr != NULL) {
3515 setenv((char *)oidp->oid_arg1, (char *)req->newptr);
3516 acpi_set_debugging(NULL);
3518 ACPI_SERIAL_END(acpi);
3523 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING,
3524 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", "");
3525 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING,
3526 "debug.acpi.level", 0, acpi_debug_sysctl, "A", "");
3527 #endif /* ACPI_DEBUG */
3530 acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS)
3535 old = acpi_debug_objects;
3536 error = sysctl_handle_int(oidp, &acpi_debug_objects, 0, req);
3537 if (error != 0 || req->newptr == NULL)
3539 if (old == acpi_debug_objects || (old && acpi_debug_objects))
3542 ACPI_SERIAL_BEGIN(acpi);
3543 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE;
3544 ACPI_SERIAL_END(acpi);
3550 acpi_parse_interfaces(char *str, struct acpi_interface *iface)
3557 while (isspace(*p) || *p == ',')
3562 p = strdup(p, M_TEMP);
3563 for (i = 0; i < len; i++)
3568 if (isspace(p[i]) || p[i] == '\0')
3571 i += strlen(p + i) + 1;
3578 iface->data = malloc(sizeof(*iface->data) * j, M_TEMP, M_WAITOK);
3582 if (isspace(p[i]) || p[i] == '\0')
3585 iface->data[j] = p + i;
3586 i += strlen(p + i) + 1;
3594 acpi_free_interfaces(struct acpi_interface *iface)
3597 free(iface->data[0], M_TEMP);
3598 free(iface->data, M_TEMP);
3602 acpi_reset_interfaces(device_t dev)
3604 struct acpi_interface list;
3608 if (acpi_parse_interfaces(acpi_install_interface, &list) > 0) {
3609 for (i = 0; i < list.num; i++) {
3610 status = AcpiInstallInterface(list.data[i]);
3611 if (ACPI_FAILURE(status))
3613 "failed to install _OSI(\"%s\"): %s\n",
3614 list.data[i], AcpiFormatException(status));
3615 else if (bootverbose)
3616 device_printf(dev, "installed _OSI(\"%s\")\n",
3619 acpi_free_interfaces(&list);
3621 if (acpi_parse_interfaces(acpi_remove_interface, &list) > 0) {
3622 for (i = 0; i < list.num; i++) {
3623 status = AcpiRemoveInterface(list.data[i]);
3624 if (ACPI_FAILURE(status))
3626 "failed to remove _OSI(\"%s\"): %s\n",
3627 list.data[i], AcpiFormatException(status));
3628 else if (bootverbose)
3629 device_printf(dev, "removed _OSI(\"%s\")\n",
3632 acpi_free_interfaces(&list);
3637 acpi_pm_func(u_long cmd, void *arg, ...)
3639 int state, acpi_state;
3641 struct acpi_softc *sc;
3646 case POWER_CMD_SUSPEND:
3647 sc = (struct acpi_softc *)arg;
3654 state = va_arg(ap, int);
3658 case POWER_SLEEP_STATE_STANDBY:
3659 acpi_state = sc->acpi_standby_sx;
3661 case POWER_SLEEP_STATE_SUSPEND:
3662 acpi_state = sc->acpi_suspend_sx;
3664 case POWER_SLEEP_STATE_HIBERNATE:
3665 acpi_state = ACPI_STATE_S4;
3672 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state)))
3685 acpi_pm_register(void *arg)
3687 if (!cold || resource_disabled("acpi", 0))
3690 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL);
3693 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0);