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>
69 #include <vm/vm_param.h>
71 MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices");
73 /* Hooks for the ACPI CA debugging infrastructure */
74 #define _COMPONENT ACPI_BUS
75 ACPI_MODULE_NAME("ACPI")
77 static d_open_t acpiopen;
78 static d_close_t acpiclose;
79 static d_ioctl_t acpiioctl;
81 static struct cdevsw acpi_cdevsw = {
82 .d_version = D_VERSION,
89 struct acpi_interface {
94 /* Global mutex for locking access to the ACPI subsystem. */
95 struct mtx acpi_mutex;
97 /* Bitmap of device quirks. */
100 /* Supported sleep states. */
101 static BOOLEAN acpi_sleep_states[ACPI_S_STATE_COUNT];
103 static int acpi_modevent(struct module *mod, int event, void *junk);
104 static int acpi_probe(device_t dev);
105 static int acpi_attach(device_t dev);
106 static int acpi_suspend(device_t dev);
107 static int acpi_resume(device_t dev);
108 static int acpi_shutdown(device_t dev);
109 static device_t acpi_add_child(device_t bus, u_int order, const char *name,
111 static int acpi_print_child(device_t bus, device_t child);
112 static void acpi_probe_nomatch(device_t bus, device_t child);
113 static void acpi_driver_added(device_t dev, driver_t *driver);
114 static int acpi_read_ivar(device_t dev, device_t child, int index,
116 static int acpi_write_ivar(device_t dev, device_t child, int index,
118 static struct resource_list *acpi_get_rlist(device_t dev, device_t child);
119 static void acpi_reserve_resources(device_t dev);
120 static int acpi_sysres_alloc(device_t dev);
121 static int acpi_set_resource(device_t dev, device_t child, int type,
122 int rid, u_long start, u_long count);
123 static struct resource *acpi_alloc_resource(device_t bus, device_t child,
124 int type, int *rid, u_long start, u_long end,
125 u_long count, u_int flags);
126 static int acpi_adjust_resource(device_t bus, device_t child, int type,
127 struct resource *r, u_long start, u_long end);
128 static int acpi_release_resource(device_t bus, device_t child, int type,
129 int rid, struct resource *r);
130 static void acpi_delete_resource(device_t bus, device_t child, int type,
132 static uint32_t acpi_isa_get_logicalid(device_t dev);
133 static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count);
134 static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids);
135 static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev,
136 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters,
138 static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level,
139 void *context, void **retval);
140 static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev,
141 int max_depth, acpi_scan_cb_t user_fn, void *arg);
142 static int acpi_set_powerstate(device_t child, int state);
143 static int acpi_isa_pnp_probe(device_t bus, device_t child,
144 struct isa_pnp_id *ids);
145 static void acpi_probe_children(device_t bus);
146 static void acpi_probe_order(ACPI_HANDLE handle, int *order);
147 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level,
148 void *context, void **status);
149 static void acpi_sleep_enable(void *arg);
150 static ACPI_STATUS acpi_sleep_disable(struct acpi_softc *sc);
151 static ACPI_STATUS acpi_EnterSleepState(struct acpi_softc *sc, int state);
152 static void acpi_shutdown_final(void *arg, int howto);
153 static void acpi_enable_fixed_events(struct acpi_softc *sc);
154 static BOOLEAN acpi_has_hid(ACPI_HANDLE handle);
155 static void acpi_resync_clock(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, acpi_set_resource),
198 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
199 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource),
200 DEVMETHOD(bus_adjust_resource, acpi_adjust_resource),
201 DEVMETHOD(bus_release_resource, acpi_release_resource),
202 DEVMETHOD(bus_delete_resource, acpi_delete_resource),
203 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method),
204 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method),
205 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
206 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
207 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
208 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
209 DEVMETHOD(bus_hint_device_unit, acpi_hint_device_unit),
212 DEVMETHOD(acpi_id_probe, acpi_device_id_probe),
213 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj),
214 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep),
215 DEVMETHOD(acpi_scan_children, acpi_device_scan_children),
218 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe),
223 static driver_t acpi_driver = {
226 sizeof(struct acpi_softc),
229 static devclass_t acpi_devclass;
230 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0);
231 MODULE_VERSION(acpi, 1);
233 ACPI_SERIAL_DECL(acpi, "ACPI root bus");
235 /* Local pools for managing system resources for ACPI child devices. */
236 static struct rman acpi_rman_io, acpi_rman_mem;
238 #define ACPI_MINIMUM_AWAKETIME 5
240 /* Holds the description of the acpi0 device. */
241 static char acpi_desc[ACPI_OEM_ID_SIZE + ACPI_OEM_TABLE_ID_SIZE + 2];
243 SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging");
244 static char acpi_ca_version[12];
245 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD,
246 acpi_ca_version, 0, "Version of Intel ACPI-CA");
249 * Allow overriding _OSI methods.
251 static char acpi_install_interface[256];
252 TUNABLE_STR("hw.acpi.install_interface", acpi_install_interface,
253 sizeof(acpi_install_interface));
254 static char acpi_remove_interface[256];
255 TUNABLE_STR("hw.acpi.remove_interface", acpi_remove_interface,
256 sizeof(acpi_remove_interface));
259 * Allow override of whether methods execute in parallel or not.
260 * Enable this for serial behavior, which fixes "AE_ALREADY_EXISTS"
261 * errors for AML that really can't handle parallel method execution.
262 * It is off by default since this breaks recursive methods and
263 * some IBMs use such code.
265 static int acpi_serialize_methods;
266 TUNABLE_INT("hw.acpi.serialize_methods", &acpi_serialize_methods);
268 /* Allow users to dump Debug objects without ACPI debugger. */
269 static int acpi_debug_objects;
270 TUNABLE_INT("debug.acpi.enable_debug_objects", &acpi_debug_objects);
271 SYSCTL_PROC(_debug_acpi, OID_AUTO, enable_debug_objects,
272 CTLFLAG_RW | CTLTYPE_INT, NULL, 0, acpi_debug_objects_sysctl, "I",
273 "Enable Debug objects");
275 /* Allow the interpreter to ignore common mistakes in BIOS. */
276 static int acpi_interpreter_slack = 1;
277 TUNABLE_INT("debug.acpi.interpreter_slack", &acpi_interpreter_slack);
278 SYSCTL_INT(_debug_acpi, OID_AUTO, interpreter_slack, CTLFLAG_RDTUN,
279 &acpi_interpreter_slack, 1, "Turn on interpreter slack mode.");
282 /* Reset system clock while resuming. XXX Remove once tested. */
283 static int acpi_reset_clock = 1;
284 TUNABLE_INT("debug.acpi.reset_clock", &acpi_reset_clock);
285 SYSCTL_INT(_debug_acpi, OID_AUTO, reset_clock, CTLFLAG_RW,
286 &acpi_reset_clock, 1, "Reset system clock while resuming.");
289 /* Allow users to override quirks. */
290 TUNABLE_INT("debug.acpi.quirks", &acpi_quirks);
292 static int acpi_susp_bounce;
293 SYSCTL_INT(_debug_acpi, OID_AUTO, suspend_bounce, CTLFLAG_RW,
294 &acpi_susp_bounce, 0, "Don't actually suspend, just test devices.");
297 * ACPI can only be loaded as a module by the loader; activating it after
298 * system bootstrap time is not useful, and can be fatal to the system.
299 * It also cannot be unloaded, since the entire system bus hierarchy hangs
303 acpi_modevent(struct module *mod, int event, void *junk)
308 printf("The ACPI driver cannot be loaded after boot.\n");
313 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI)
323 * Perform early initialization.
328 static int started = 0;
332 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
334 /* Only run the startup code once. The MADT driver also calls this. */
336 return_VALUE (AE_OK);
340 * Pre-allocate space for RSDT/XSDT and DSDT tables and allow resizing
341 * if more tables exist.
343 if (ACPI_FAILURE(status = AcpiInitializeTables(NULL, 2, TRUE))) {
344 printf("ACPI: Table initialisation failed: %s\n",
345 AcpiFormatException(status));
346 return_VALUE (status);
349 /* Set up any quirks we have for this system. */
350 if (acpi_quirks == ACPI_Q_OK)
351 acpi_table_quirks(&acpi_quirks);
353 /* If the user manually set the disabled hint to 0, force-enable ACPI. */
354 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0)
355 acpi_quirks &= ~ACPI_Q_BROKEN;
356 if (acpi_quirks & ACPI_Q_BROKEN) {
357 printf("ACPI disabled by blacklist. Contact your BIOS vendor.\n");
361 return_VALUE (status);
365 * Detect ACPI and perform early initialisation.
370 ACPI_TABLE_RSDP *rsdp;
371 ACPI_TABLE_HEADER *rsdt;
372 ACPI_PHYSICAL_ADDRESS paddr;
375 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
380 /* Check that we haven't been disabled with a hint. */
381 if (resource_disabled("acpi", 0))
384 /* Check for other PM systems. */
385 if (power_pm_get_type() != POWER_PM_TYPE_NONE &&
386 power_pm_get_type() != POWER_PM_TYPE_ACPI) {
387 printf("ACPI identify failed, other PM system enabled.\n");
391 /* Initialize root tables. */
392 if (ACPI_FAILURE(acpi_Startup())) {
393 printf("ACPI: Try disabling either ACPI or apic support.\n");
397 if ((paddr = AcpiOsGetRootPointer()) == 0 ||
398 (rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP))) == NULL)
400 if (rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress != 0)
401 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress;
403 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress;
404 AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP));
406 if ((rsdt = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER))) == NULL)
408 sbuf_new(&sb, acpi_desc, sizeof(acpi_desc), SBUF_FIXEDLEN);
409 sbuf_bcat(&sb, rsdt->OemId, ACPI_OEM_ID_SIZE);
412 sbuf_bcat(&sb, rsdt->OemTableId, ACPI_OEM_TABLE_ID_SIZE);
416 AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER));
418 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%x", ACPI_CA_VERSION);
424 * Fetch some descriptive data from ACPI to put in our attach message.
427 acpi_probe(device_t dev)
430 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
432 device_set_desc(dev, acpi_desc);
438 acpi_attach(device_t dev)
440 struct acpi_softc *sc;
447 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
449 sc = device_get_softc(dev);
451 callout_init(&sc->susp_force_to, TRUE);
455 /* Initialize resource manager. */
456 acpi_rman_io.rm_type = RMAN_ARRAY;
457 acpi_rman_io.rm_start = 0;
458 acpi_rman_io.rm_end = 0xffff;
459 acpi_rman_io.rm_descr = "ACPI I/O ports";
460 if (rman_init(&acpi_rman_io) != 0)
461 panic("acpi rman_init IO ports failed");
462 acpi_rman_mem.rm_type = RMAN_ARRAY;
463 acpi_rman_mem.rm_start = 0;
464 acpi_rman_mem.rm_end = ~0ul;
465 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses";
466 if (rman_init(&acpi_rman_mem) != 0)
467 panic("acpi rman_init memory failed");
469 /* Initialise the ACPI mutex */
470 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF);
473 * Set the globals from our tunables. This is needed because ACPI-CA
474 * uses UINT8 for some values and we have no tunable_byte.
476 AcpiGbl_AllMethodsSerialized = acpi_serialize_methods ? TRUE : FALSE;
477 AcpiGbl_EnableInterpreterSlack = acpi_interpreter_slack ? TRUE : FALSE;
478 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE;
482 * Disable all debugging layers and levels.
488 /* Start up the ACPI CA subsystem. */
489 status = AcpiInitializeSubsystem();
490 if (ACPI_FAILURE(status)) {
491 device_printf(dev, "Could not initialize Subsystem: %s\n",
492 AcpiFormatException(status));
496 /* Override OS interfaces if the user requested. */
497 acpi_reset_interfaces(dev);
499 /* Load ACPI name space. */
500 status = AcpiLoadTables();
501 if (ACPI_FAILURE(status)) {
502 device_printf(dev, "Could not load Namespace: %s\n",
503 AcpiFormatException(status));
507 #if defined(__i386__) || defined(__amd64__)
508 /* Handle MCFG table if present. */
513 * Note that some systems (specifically, those with namespace evaluation
514 * issues that require the avoidance of parts of the namespace) must
515 * avoid running _INI and _STA on everything, as well as dodging the final
518 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT).
520 * XXX We should arrange for the object init pass after we have attached
521 * all our child devices, but on many systems it works here.
524 if (testenv("debug.acpi.avoid"))
525 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT;
527 /* Bring the hardware and basic handlers online. */
528 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) {
529 device_printf(dev, "Could not enable ACPI: %s\n",
530 AcpiFormatException(status));
535 * Call the ECDT probe function to provide EC functionality before
536 * the namespace has been evaluated.
538 * XXX This happens before the sysresource devices have been probed and
539 * attached so its resources come from nexus0. In practice, this isn't
540 * a problem but should be addressed eventually.
542 acpi_ec_ecdt_probe(dev);
544 /* Bring device objects and regions online. */
545 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) {
546 device_printf(dev, "Could not initialize ACPI objects: %s\n",
547 AcpiFormatException(status));
552 * Setup our sysctl tree.
554 * XXX: This doesn't check to make sure that none of these fail.
556 sysctl_ctx_init(&sc->acpi_sysctl_ctx);
557 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx,
558 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO,
559 device_get_name(dev), CTLFLAG_RD, 0, "");
560 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
561 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD,
562 0, 0, acpi_supported_sleep_state_sysctl, "A", "");
563 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
564 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW,
565 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", "");
566 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
567 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW,
568 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", "");
569 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
570 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW,
571 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", "");
572 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
573 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW,
574 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", "");
575 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
576 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW,
577 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", "");
578 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
579 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0,
580 "sleep delay in seconds");
581 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
582 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode");
583 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
584 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode");
585 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
586 OID_AUTO, "disable_on_reboot", CTLFLAG_RW,
587 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system");
588 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
589 OID_AUTO, "handle_reboot", CTLFLAG_RW,
590 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot");
593 * Default to 1 second before sleeping to give some machines time to
596 sc->acpi_sleep_delay = 1;
598 sc->acpi_verbose = 1;
599 if ((env = getenv("hw.acpi.verbose")) != NULL) {
600 if (strcmp(env, "0") != 0)
601 sc->acpi_verbose = 1;
605 /* Only enable reboot by default if the FADT says it is available. */
606 if (AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER)
607 sc->acpi_handle_reboot = 1;
609 /* Only enable S4BIOS by default if the FACS says it is available. */
610 if (AcpiGbl_FACS->Flags & ACPI_FACS_S4_BIOS_PRESENT)
613 /* Probe all supported sleep states. */
614 acpi_sleep_states[ACPI_STATE_S0] = TRUE;
615 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++)
616 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB)))
617 acpi_sleep_states[state] = TRUE;
620 * Dispatch the default sleep state to devices. The lid switch is set
621 * to UNKNOWN by default to avoid surprising users.
623 sc->acpi_power_button_sx = acpi_sleep_states[ACPI_STATE_S5] ?
624 ACPI_STATE_S5 : ACPI_STATE_UNKNOWN;
625 sc->acpi_lid_switch_sx = ACPI_STATE_UNKNOWN;
626 sc->acpi_standby_sx = acpi_sleep_states[ACPI_STATE_S1] ?
627 ACPI_STATE_S1 : ACPI_STATE_UNKNOWN;
628 sc->acpi_suspend_sx = acpi_sleep_states[ACPI_STATE_S3] ?
629 ACPI_STATE_S3 : ACPI_STATE_UNKNOWN;
631 /* Pick the first valid sleep state for the sleep button default. */
632 sc->acpi_sleep_button_sx = ACPI_STATE_UNKNOWN;
633 for (state = ACPI_STATE_S1; state <= ACPI_STATE_S4; state++)
634 if (acpi_sleep_states[state]) {
635 sc->acpi_sleep_button_sx = state;
639 acpi_enable_fixed_events(sc);
642 * Scan the namespace and attach/initialise children.
645 /* Register our shutdown handler. */
646 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc,
650 * Register our acpi event handlers.
651 * XXX should be configurable eg. via userland policy manager.
653 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep,
654 sc, ACPI_EVENT_PRI_LAST);
655 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup,
656 sc, ACPI_EVENT_PRI_LAST);
658 /* Flag our initial states. */
659 sc->acpi_enabled = TRUE;
660 sc->acpi_sstate = ACPI_STATE_S0;
661 sc->acpi_sleep_disabled = TRUE;
663 /* Create the control device */
664 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644,
666 sc->acpi_dev_t->si_drv1 = sc;
668 if ((error = acpi_machdep_init(dev)))
671 /* Register ACPI again to pass the correct argument of pm_func. */
672 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc);
674 if (!acpi_disabled("bus"))
675 acpi_probe_children(dev);
677 /* Update all GPEs and enable runtime GPEs. */
678 status = AcpiUpdateAllGpes();
679 if (ACPI_FAILURE(status))
680 device_printf(dev, "Could not update all GPEs: %s\n",
681 AcpiFormatException(status));
683 /* Allow sleep request after a while. */
684 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME);
689 return_VALUE (error);
693 acpi_set_power_children(device_t dev, int state)
695 device_t child, parent;
697 struct pci_devinfo *dinfo;
698 int dstate, i, numdevs;
700 if (device_get_children(dev, &devlist, &numdevs) != 0)
704 * Retrieve and set D-state for the sleep state if _SxD is present.
705 * Skip children who aren't attached since they are handled separately.
707 parent = device_get_parent(dev);
708 for (i = 0; i < numdevs; i++) {
710 dinfo = device_get_ivars(child);
712 if (device_is_attached(child) &&
713 acpi_device_pwr_for_sleep(parent, dev, &dstate) == 0)
714 acpi_set_powerstate(child, dstate);
716 free(devlist, M_TEMP);
720 acpi_suspend(device_t dev)
726 error = bus_generic_suspend(dev);
728 acpi_set_power_children(dev, ACPI_STATE_D3);
734 acpi_resume(device_t dev)
739 acpi_set_power_children(dev, ACPI_STATE_D0);
741 return (bus_generic_resume(dev));
745 acpi_shutdown(device_t dev)
750 /* Allow children to shutdown first. */
751 bus_generic_shutdown(dev);
754 * Enable any GPEs that are able to power-on the system (i.e., RTC).
755 * Also, disable any that are not valid for this state (most).
757 acpi_wake_prep_walk(ACPI_STATE_S5);
763 * Handle a new device being added
766 acpi_add_child(device_t bus, u_int order, const char *name, int unit)
768 struct acpi_device *ad;
771 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL)
774 resource_list_init(&ad->ad_rl);
776 child = device_add_child_ordered(bus, order, name, unit);
778 device_set_ivars(child, ad);
785 acpi_print_child(device_t bus, device_t child)
787 struct acpi_device *adev = device_get_ivars(child);
788 struct resource_list *rl = &adev->ad_rl;
791 retval += bus_print_child_header(bus, child);
792 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx");
793 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx");
794 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
795 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld");
796 if (device_get_flags(child))
797 retval += printf(" flags %#x", device_get_flags(child));
798 retval += bus_print_child_footer(bus, child);
804 * If this device is an ACPI child but no one claimed it, attempt
805 * to power it off. We'll power it back up when a driver is added.
807 * XXX Disabled for now since many necessary devices (like fdc and
808 * ATA) don't claim the devices we created for them but still expect
809 * them to be powered up.
812 acpi_probe_nomatch(device_t bus, device_t child)
814 #ifdef ACPI_ENABLE_POWERDOWN_NODRIVER
815 acpi_set_powerstate(child, ACPI_STATE_D3);
820 * If a new driver has a chance to probe a child, first power it up.
822 * XXX Disabled for now (see acpi_probe_nomatch for details).
825 acpi_driver_added(device_t dev, driver_t *driver)
827 device_t child, *devlist;
830 DEVICE_IDENTIFY(driver, dev);
831 if (device_get_children(dev, &devlist, &numdevs))
833 for (i = 0; i < numdevs; i++) {
835 if (device_get_state(child) == DS_NOTPRESENT) {
836 #ifdef ACPI_ENABLE_POWERDOWN_NODRIVER
837 acpi_set_powerstate(child, ACPI_STATE_D0);
838 if (device_probe_and_attach(child) != 0)
839 acpi_set_powerstate(child, ACPI_STATE_D3);
841 device_probe_and_attach(child);
845 free(devlist, M_TEMP);
848 /* Location hint for devctl(8) */
850 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf,
853 struct acpi_device *dinfo = device_get_ivars(child);
855 if (dinfo->ad_handle)
856 snprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle));
858 snprintf(buf, buflen, "unknown");
862 /* PnP information for devctl(8) */
864 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf,
867 struct acpi_device *dinfo = device_get_ivars(child);
868 ACPI_DEVICE_INFO *adinfo;
870 if (ACPI_FAILURE(AcpiGetObjectInfo(dinfo->ad_handle, &adinfo))) {
871 snprintf(buf, buflen, "unknown");
875 snprintf(buf, buflen, "_HID=%s _UID=%lu",
876 (adinfo->Valid & ACPI_VALID_HID) ?
877 adinfo->HardwareId.String : "none",
878 (adinfo->Valid & ACPI_VALID_UID) ?
879 strtoul(adinfo->UniqueId.String, NULL, 10) : 0UL);
886 * Handle per-device ivars
889 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
891 struct acpi_device *ad;
893 if ((ad = device_get_ivars(child)) == NULL) {
894 device_printf(child, "device has no ivars\n");
898 /* ACPI and ISA compatibility ivars */
900 case ACPI_IVAR_HANDLE:
901 *(ACPI_HANDLE *)result = ad->ad_handle;
903 case ACPI_IVAR_PRIVATE:
904 *(void **)result = ad->ad_private;
906 case ACPI_IVAR_FLAGS:
907 *(int *)result = ad->ad_flags;
909 case ISA_IVAR_VENDORID:
910 case ISA_IVAR_SERIAL:
911 case ISA_IVAR_COMPATID:
914 case ISA_IVAR_LOGICALID:
915 *(int *)result = acpi_isa_get_logicalid(child);
925 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value)
927 struct acpi_device *ad;
929 if ((ad = device_get_ivars(child)) == NULL) {
930 device_printf(child, "device has no ivars\n");
935 case ACPI_IVAR_HANDLE:
936 ad->ad_handle = (ACPI_HANDLE)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 acpi_match_resource_hint(device_t dev, int type, long value)
967 struct acpi_device *ad = device_get_ivars(dev);
968 struct resource_list *rl = &ad->ad_rl;
969 struct resource_list_entry *rle;
971 STAILQ_FOREACH(rle, rl, link) {
972 if (rle->type != type)
974 if (rle->start <= value && rle->end >= value)
981 * Wire device unit numbers based on resource matches in hints.
984 acpi_hint_device_unit(device_t acdev, device_t child, const char *name,
989 int line, matches, unit;
992 * Iterate over all the hints for the devices with the specified
993 * name to see if one's resources are a subset of this device.
997 if (resource_find_dev(&line, name, &unit, "at", NULL) != 0)
1000 /* Must have an "at" for acpi or isa. */
1001 resource_string_value(name, unit, "at", &s);
1002 if (!(strcmp(s, "acpi0") == 0 || strcmp(s, "acpi") == 0 ||
1003 strcmp(s, "isa0") == 0 || strcmp(s, "isa") == 0))
1007 * Check for matching resources. We must have at least one match.
1008 * Since I/O and memory resources cannot be shared, if we get a
1009 * match on either of those, ignore any mismatches in IRQs or DRQs.
1011 * XXX: We may want to revisit this to be more lenient and wire
1012 * as long as it gets one match.
1015 if (resource_long_value(name, unit, "port", &value) == 0) {
1017 * Floppy drive controllers are notorious for having a
1018 * wide variety of resources not all of which include the
1019 * first port that is specified by the hint (typically
1020 * 0x3f0) (see the comment above fdc_isa_alloc_resources()
1021 * in fdc_isa.c). However, they do all seem to include
1022 * port + 2 (e.g. 0x3f2) so for a floppy device, look for
1023 * 'value + 2' in the port resources instead of the hint
1026 if (strcmp(name, "fdc") == 0)
1028 if (acpi_match_resource_hint(child, SYS_RES_IOPORT, value))
1033 if (resource_long_value(name, unit, "maddr", &value) == 0) {
1034 if (acpi_match_resource_hint(child, SYS_RES_MEMORY, value))
1041 if (resource_long_value(name, unit, "irq", &value) == 0) {
1042 if (acpi_match_resource_hint(child, SYS_RES_IRQ, value))
1047 if (resource_long_value(name, unit, "drq", &value) == 0) {
1048 if (acpi_match_resource_hint(child, SYS_RES_DRQ, value))
1056 /* We have a winner! */
1064 * Pre-allocate/manage all memory and IO resources. Since rman can't handle
1065 * duplicates, we merge any in the sysresource attach routine.
1068 acpi_sysres_alloc(device_t dev)
1070 struct resource *res;
1071 struct resource_list *rl;
1072 struct resource_list_entry *rle;
1074 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL };
1079 * Probe/attach any sysresource devices. This would be unnecessary if we
1080 * had multi-pass probe/attach.
1082 if (device_get_children(dev, &children, &child_count) != 0)
1084 for (i = 0; i < child_count; i++) {
1085 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL)
1086 device_probe_and_attach(children[i]);
1088 free(children, M_TEMP);
1090 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev);
1091 STAILQ_FOREACH(rle, rl, link) {
1092 if (rle->res != NULL) {
1093 device_printf(dev, "duplicate resource for %lx\n", rle->start);
1097 /* Only memory and IO resources are valid here. */
1098 switch (rle->type) {
1099 case SYS_RES_IOPORT:
1102 case SYS_RES_MEMORY:
1103 rm = &acpi_rman_mem;
1109 /* Pre-allocate resource and add to our rman pool. */
1110 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type,
1111 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 0);
1113 rman_manage_region(rm, rman_get_start(res), rman_get_end(res));
1116 device_printf(dev, "reservation of %lx, %lx (%d) failed\n",
1117 rle->start, rle->count, rle->type);
1122 static char *pcilink_ids[] = { "PNP0C0F", NULL };
1123 static char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL };
1126 * Reserve declared resources for devices found during attach once system
1127 * resources have been allocated.
1130 acpi_reserve_resources(device_t dev)
1132 struct resource_list_entry *rle;
1133 struct resource_list *rl;
1134 struct acpi_device *ad;
1135 struct acpi_softc *sc;
1139 sc = device_get_softc(dev);
1140 if (device_get_children(dev, &children, &child_count) != 0)
1142 for (i = 0; i < child_count; i++) {
1143 ad = device_get_ivars(children[i]);
1146 /* Don't reserve system resources. */
1147 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL)
1150 STAILQ_FOREACH(rle, rl, link) {
1152 * Don't reserve IRQ resources. There are many sticky things
1153 * to get right otherwise (e.g. IRQs for psm, atkbd, and HPET
1154 * when using legacy routing).
1156 if (rle->type == SYS_RES_IRQ)
1160 * Don't reserve the resource if it is already allocated.
1161 * The acpi_ec(4) driver can allocate its resources early
1162 * if ECDT is present.
1164 if (rle->res != NULL)
1168 * Try to reserve the resource from our parent. If this
1169 * fails because the resource is a system resource, just
1170 * let it be. The resource range is already reserved so
1171 * that other devices will not use it. If the driver
1172 * needs to allocate the resource, then
1173 * acpi_alloc_resource() will sub-alloc from the system
1176 resource_list_reserve(rl, dev, children[i], rle->type, &rle->rid,
1177 rle->start, rle->end, rle->count, 0);
1180 free(children, M_TEMP);
1181 sc->acpi_resources_reserved = 1;
1185 acpi_set_resource(device_t dev, device_t child, int type, int rid,
1186 u_long start, u_long count)
1188 struct acpi_softc *sc = device_get_softc(dev);
1189 struct acpi_device *ad = device_get_ivars(child);
1190 struct resource_list *rl = &ad->ad_rl;
1193 /* Ignore IRQ resources for PCI link devices. */
1194 if (type == SYS_RES_IRQ && ACPI_ID_PROBE(dev, child, pcilink_ids) != NULL)
1197 /* If the resource is already allocated, fail. */
1198 if (resource_list_busy(rl, type, rid))
1201 /* If the resource is already reserved, release it. */
1202 if (resource_list_reserved(rl, type, rid))
1203 resource_list_unreserve(rl, dev, child, type, rid);
1205 /* Add the resource. */
1206 end = (start + count - 1);
1207 resource_list_add(rl, type, rid, start, end, count);
1209 /* Don't reserve resources until the system resources are allocated. */
1210 if (!sc->acpi_resources_reserved)
1213 /* Don't reserve system resources. */
1214 if (ACPI_ID_PROBE(dev, child, sysres_ids) != NULL)
1218 * Don't reserve IRQ resources. There are many sticky things to
1219 * get right otherwise (e.g. IRQs for psm, atkbd, and HPET when
1220 * using legacy routing).
1222 if (type == SYS_RES_IRQ)
1226 * Reserve the resource.
1228 * XXX: Ignores failure for now. Failure here is probably a
1229 * BIOS/firmware bug?
1231 resource_list_reserve(rl, dev, child, type, &rid, start, end, count, 0);
1235 static struct resource *
1236 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid,
1237 u_long start, u_long end, u_long count, u_int flags)
1240 struct acpi_device *ad;
1241 struct resource_list_entry *rle;
1242 struct resource_list *rl;
1243 struct resource *res;
1244 int isdefault = (start == 0UL && end == ~0UL);
1247 * First attempt at allocating the resource. For direct children,
1248 * use resource_list_alloc() to handle reserved resources. For
1249 * other devices, pass the request up to our parent.
1251 if (bus == device_get_parent(child)) {
1252 ad = device_get_ivars(child);
1256 * Simulate the behavior of the ISA bus for direct children
1257 * devices. That is, if a non-default range is specified for
1258 * a resource that doesn't exist, use bus_set_resource() to
1259 * add the resource before allocating it. Note that these
1260 * resources will not be reserved.
1262 if (!isdefault && resource_list_find(rl, type, *rid) == NULL)
1263 resource_list_add(rl, type, *rid, start, end, count);
1264 res = resource_list_alloc(rl, bus, child, type, rid, start, end, count,
1266 if (res != NULL && type == SYS_RES_IRQ) {
1268 * Since bus_config_intr() takes immediate effect, we cannot
1269 * configure the interrupt associated with a device when we
1270 * parse the resources but have to defer it until a driver
1271 * actually allocates the interrupt via bus_alloc_resource().
1273 * XXX: Should we handle the lookup failing?
1275 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares)))
1276 acpi_config_intr(child, &ares);
1280 * If this is an allocation of the "default" range for a given
1281 * RID, fetch the exact bounds for this resource from the
1282 * resource list entry to try to allocate the range from the
1283 * system resource regions.
1285 if (res == NULL && isdefault) {
1286 rle = resource_list_find(rl, type, *rid);
1294 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid,
1295 start, end, count, flags);
1298 * If the first attempt failed and this is an allocation of a
1299 * specific range, try to satisfy the request via a suballocation
1300 * from our system resource regions.
1302 if (res == NULL && start + count - 1 == end)
1303 res = acpi_alloc_sysres(child, type, rid, start, end, count, flags);
1308 * Attempt to allocate a specific resource range from the system
1309 * resource ranges. Note that we only handle memory and I/O port
1313 acpi_alloc_sysres(device_t child, int type, int *rid, u_long start, u_long end,
1314 u_long count, u_int flags)
1317 struct resource *res;
1320 case SYS_RES_IOPORT:
1323 case SYS_RES_MEMORY:
1324 rm = &acpi_rman_mem;
1330 KASSERT(start + count - 1 == end, ("wildcard resource range"));
1331 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE,
1336 rman_set_rid(res, *rid);
1338 /* If requested, activate the resource using the parent's method. */
1339 if (flags & RF_ACTIVE)
1340 if (bus_activate_resource(child, type, *rid, res) != 0) {
1341 rman_release_resource(res);
1349 acpi_is_resource_managed(int type, struct resource *r)
1352 /* We only handle memory and IO resources through rman. */
1354 case SYS_RES_IOPORT:
1355 return (rman_is_region_manager(r, &acpi_rman_io));
1356 case SYS_RES_MEMORY:
1357 return (rman_is_region_manager(r, &acpi_rman_mem));
1363 acpi_adjust_resource(device_t bus, device_t child, int type, struct resource *r,
1364 u_long start, u_long end)
1367 if (acpi_is_resource_managed(type, r))
1368 return (rman_adjust_resource(r, start, end));
1369 return (bus_generic_adjust_resource(bus, child, type, r, start, end));
1373 acpi_release_resource(device_t bus, device_t child, int type, int rid,
1379 * If this resource belongs to one of our internal managers,
1380 * deactivate it and release it to the local pool.
1382 if (acpi_is_resource_managed(type, r)) {
1383 if (rman_get_flags(r) & RF_ACTIVE) {
1384 ret = bus_deactivate_resource(child, type, rid, r);
1388 return (rman_release_resource(r));
1391 return (bus_generic_rl_release_resource(bus, child, type, rid, r));
1395 acpi_delete_resource(device_t bus, device_t child, int type, int rid)
1397 struct resource_list *rl;
1399 rl = acpi_get_rlist(bus, child);
1400 if (resource_list_busy(rl, type, rid)) {
1401 device_printf(bus, "delete_resource: Resource still owned by child"
1402 " (type=%d, rid=%d)\n", type, rid);
1405 resource_list_unreserve(rl, bus, child, type, rid);
1406 resource_list_delete(rl, type, rid);
1409 /* Allocate an IO port or memory resource, given its GAS. */
1411 acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas,
1412 struct resource **res, u_int flags)
1414 int error, res_type;
1417 if (type == NULL || rid == NULL || gas == NULL || res == NULL)
1420 /* We only support memory and IO spaces. */
1421 switch (gas->SpaceId) {
1422 case ACPI_ADR_SPACE_SYSTEM_MEMORY:
1423 res_type = SYS_RES_MEMORY;
1425 case ACPI_ADR_SPACE_SYSTEM_IO:
1426 res_type = SYS_RES_IOPORT;
1429 return (EOPNOTSUPP);
1433 * If the register width is less than 8, assume the BIOS author means
1434 * it is a bit field and just allocate a byte.
1436 if (gas->BitWidth && gas->BitWidth < 8)
1439 /* Validate the address after we're sure we support the space. */
1440 if (gas->Address == 0 || gas->BitWidth == 0)
1443 bus_set_resource(dev, res_type, *rid, gas->Address,
1445 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags);
1450 bus_delete_resource(dev, res_type, *rid);
1455 /* Probe _HID and _CID for compatible ISA PNP ids. */
1457 acpi_isa_get_logicalid(device_t dev)
1459 ACPI_DEVICE_INFO *devinfo;
1463 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1465 /* Fetch and validate the HID. */
1466 if ((h = acpi_get_handle(dev)) == NULL ||
1467 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
1470 pnpid = (devinfo->Valid & ACPI_VALID_HID) != 0 &&
1471 devinfo->HardwareId.Length >= ACPI_EISAID_STRING_SIZE ?
1472 PNP_EISAID(devinfo->HardwareId.String) : 0;
1473 AcpiOsFree(devinfo);
1475 return_VALUE (pnpid);
1479 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count)
1481 ACPI_DEVICE_INFO *devinfo;
1482 ACPI_DEVICE_ID *ids;
1487 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1491 /* Fetch and validate the CID */
1492 if ((h = acpi_get_handle(dev)) == NULL ||
1493 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
1496 if ((devinfo->Valid & ACPI_VALID_CID) == 0) {
1497 AcpiOsFree(devinfo);
1501 if (devinfo->CompatibleIdList.Count < count)
1502 count = devinfo->CompatibleIdList.Count;
1503 ids = devinfo->CompatibleIdList.Ids;
1504 for (i = 0, valid = 0; i < count; i++)
1505 if (ids[i].Length >= ACPI_EISAID_STRING_SIZE &&
1506 strncmp(ids[i].String, "PNP", 3) == 0) {
1507 *pnpid++ = PNP_EISAID(ids[i].String);
1510 AcpiOsFree(devinfo);
1512 return_VALUE (valid);
1516 acpi_device_id_probe(device_t bus, device_t dev, char **ids)
1522 h = acpi_get_handle(dev);
1523 if (ids == NULL || h == NULL)
1525 t = acpi_get_type(dev);
1526 if (t != ACPI_TYPE_DEVICE && t != ACPI_TYPE_PROCESSOR)
1529 /* Try to match one of the array of IDs with a HID or CID. */
1530 for (i = 0; ids[i] != NULL; i++) {
1531 if (acpi_MatchHid(h, ids[i]))
1538 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname,
1539 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret)
1544 h = ACPI_ROOT_OBJECT;
1545 else if ((h = acpi_get_handle(dev)) == NULL)
1546 return (AE_BAD_PARAMETER);
1547 return (AcpiEvaluateObject(h, pathname, parameters, ret));
1551 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate)
1553 struct acpi_softc *sc;
1558 handle = acpi_get_handle(dev);
1561 * XXX If we find these devices, don't try to power them down.
1562 * The serial and IRDA ports on my T23 hang the system when
1563 * set to D3 and it appears that such legacy devices may
1564 * need special handling in their drivers.
1566 if (dstate == NULL || handle == NULL ||
1567 acpi_MatchHid(handle, "PNP0500") ||
1568 acpi_MatchHid(handle, "PNP0501") ||
1569 acpi_MatchHid(handle, "PNP0502") ||
1570 acpi_MatchHid(handle, "PNP0510") ||
1571 acpi_MatchHid(handle, "PNP0511"))
1575 * Override next state with the value from _SxD, if present.
1576 * Note illegal _S0D is evaluated because some systems expect this.
1578 sc = device_get_softc(bus);
1579 snprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate);
1580 status = acpi_GetInteger(handle, sxd, dstate);
1581 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
1582 device_printf(dev, "failed to get %s on %s: %s\n", sxd,
1583 acpi_name(handle), AcpiFormatException(status));
1590 /* Callback arg for our implementation of walking the namespace. */
1591 struct acpi_device_scan_ctx {
1592 acpi_scan_cb_t user_fn;
1598 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval)
1600 struct acpi_device_scan_ctx *ctx;
1601 device_t dev, old_dev;
1603 ACPI_OBJECT_TYPE type;
1606 * Skip this device if we think we'll have trouble with it or it is
1607 * the parent where the scan began.
1609 ctx = (struct acpi_device_scan_ctx *)arg;
1610 if (acpi_avoid(h) || h == ctx->parent)
1613 /* If this is not a valid device type (e.g., a method), skip it. */
1614 if (ACPI_FAILURE(AcpiGetType(h, &type)))
1616 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR &&
1617 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER)
1621 * Call the user function with the current device. If it is unchanged
1622 * afterwards, return. Otherwise, we update the handle to the new dev.
1624 old_dev = acpi_get_device(h);
1626 status = ctx->user_fn(h, &dev, level, ctx->arg);
1627 if (ACPI_FAILURE(status) || old_dev == dev)
1630 /* Remove the old child and its connection to the handle. */
1631 if (old_dev != NULL) {
1632 device_delete_child(device_get_parent(old_dev), old_dev);
1633 AcpiDetachData(h, acpi_fake_objhandler);
1636 /* Recreate the handle association if the user created a device. */
1638 AcpiAttachData(h, acpi_fake_objhandler, dev);
1644 acpi_device_scan_children(device_t bus, device_t dev, int max_depth,
1645 acpi_scan_cb_t user_fn, void *arg)
1648 struct acpi_device_scan_ctx ctx;
1650 if (acpi_disabled("children"))
1654 h = ACPI_ROOT_OBJECT;
1655 else if ((h = acpi_get_handle(dev)) == NULL)
1656 return (AE_BAD_PARAMETER);
1657 ctx.user_fn = user_fn;
1660 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth,
1661 acpi_device_scan_cb, NULL, &ctx, NULL));
1665 * Even though ACPI devices are not PCI, we use the PCI approach for setting
1666 * device power states since it's close enough to ACPI.
1669 acpi_set_powerstate(device_t child, int state)
1674 h = acpi_get_handle(child);
1675 if (state < ACPI_STATE_D0 || state > ACPI_D_STATES_MAX)
1680 /* Ignore errors if the power methods aren't present. */
1681 status = acpi_pwr_switch_consumer(h, state);
1682 if (ACPI_SUCCESS(status)) {
1684 device_printf(child, "set ACPI power state D%d on %s\n",
1685 state, acpi_name(h));
1686 } else if (status != AE_NOT_FOUND)
1687 device_printf(child,
1688 "failed to set ACPI power state D%d on %s: %s\n", state,
1689 acpi_name(h), AcpiFormatException(status));
1695 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids)
1697 int result, cid_count, i;
1698 uint32_t lid, cids[8];
1700 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1703 * ISA-style drivers attached to ACPI may persist and
1704 * probe manually if we return ENOENT. We never want
1705 * that to happen, so don't ever return it.
1709 /* Scan the supplied IDs for a match */
1710 lid = acpi_isa_get_logicalid(child);
1711 cid_count = acpi_isa_get_compatid(child, cids, 8);
1712 while (ids && ids->ip_id) {
1713 if (lid == ids->ip_id) {
1717 for (i = 0; i < cid_count; i++) {
1718 if (cids[i] == ids->ip_id) {
1727 if (result == 0 && ids->ip_desc)
1728 device_set_desc(child, ids->ip_desc);
1730 return_VALUE (result);
1733 #if defined(__i386__) || defined(__amd64__)
1735 * Look for a MCFG table. If it is present, use the settings for
1736 * domain (segment) 0 to setup PCI config space access via the memory
1740 acpi_enable_pcie(void)
1742 ACPI_TABLE_HEADER *hdr;
1743 ACPI_MCFG_ALLOCATION *alloc, *end;
1746 status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr);
1747 if (ACPI_FAILURE(status))
1750 end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length);
1751 alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1);
1752 while (alloc < end) {
1753 if (alloc->PciSegment == 0) {
1754 pcie_cfgregopen(alloc->Address, alloc->StartBusNumber,
1755 alloc->EndBusNumber);
1764 * Scan all of the ACPI namespace and attach child devices.
1766 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and
1767 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec.
1768 * However, in violation of the spec, some systems place their PCI link
1769 * devices in \, so we have to walk the whole namespace. We check the
1770 * type of namespace nodes, so this should be ok.
1773 acpi_probe_children(device_t bus)
1776 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1779 * Scan the namespace and insert placeholders for all the devices that
1780 * we find. We also probe/attach any early devices.
1782 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because
1783 * we want to create nodes for all devices, not just those that are
1784 * currently present. (This assumes that we don't want to create/remove
1785 * devices as they appear, which might be smarter.)
1787 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n"));
1788 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, acpi_probe_child,
1791 /* Pre-allocate resources for our rman from any sysresource devices. */
1792 acpi_sysres_alloc(bus);
1794 /* Reserve resources already allocated to children. */
1795 acpi_reserve_resources(bus);
1797 /* Create any static children by calling device identify methods. */
1798 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n"));
1799 bus_generic_probe(bus);
1801 /* Probe/attach all children, created statically and from the namespace. */
1802 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "acpi bus_generic_attach\n"));
1803 bus_generic_attach(bus);
1805 /* Attach wake sysctls. */
1806 acpi_wake_sysctl_walk(bus);
1808 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n"));
1813 * Determine the probe order for a given device.
1816 acpi_probe_order(ACPI_HANDLE handle, int *order)
1818 ACPI_OBJECT_TYPE type;
1822 * 1. I/O port and memory system resource holders
1823 * 2. Clocks and timers (to handle early accesses)
1824 * 3. Embedded controllers (to handle early accesses)
1825 * 4. PCI Link Devices
1827 AcpiGetType(handle, &type);
1828 if (type == ACPI_TYPE_PROCESSOR)
1830 else if (acpi_MatchHid(handle, "PNP0C01") ||
1831 acpi_MatchHid(handle, "PNP0C02"))
1833 else if (acpi_MatchHid(handle, "PNP0100") ||
1834 acpi_MatchHid(handle, "PNP0103") ||
1835 acpi_MatchHid(handle, "PNP0B00"))
1837 else if (acpi_MatchHid(handle, "PNP0C09"))
1839 else if (acpi_MatchHid(handle, "PNP0C0F"))
1844 * Evaluate a child device and determine whether we might attach a device to
1848 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status)
1850 struct acpi_prw_data prw;
1851 ACPI_OBJECT_TYPE type;
1853 device_t bus, child;
1857 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1859 if (acpi_disabled("children"))
1860 return_ACPI_STATUS (AE_OK);
1862 /* Skip this device if we think we'll have trouble with it. */
1863 if (acpi_avoid(handle))
1864 return_ACPI_STATUS (AE_OK);
1866 bus = (device_t)context;
1867 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) {
1868 handle_str = acpi_name(handle);
1870 case ACPI_TYPE_DEVICE:
1872 * Since we scan from \, be sure to skip system scope objects.
1873 * \_SB_ and \_TZ_ are defined in ACPICA as devices to work around
1874 * BIOS bugs. For example, \_SB_ is to allow \_SB_._INI to be run
1875 * during the intialization and \_TZ_ is to support Notify() on it.
1877 if (strcmp(handle_str, "\\_SB_") == 0 ||
1878 strcmp(handle_str, "\\_TZ_") == 0)
1880 if (acpi_parse_prw(handle, &prw) == 0)
1881 AcpiSetupGpeForWake(handle, prw.gpe_handle, prw.gpe_bit);
1884 * Ignore devices that do not have a _HID or _CID. They should
1885 * be discovered by other buses (e.g. the PCI bus driver).
1887 if (!acpi_has_hid(handle))
1890 case ACPI_TYPE_PROCESSOR:
1891 case ACPI_TYPE_THERMAL:
1892 case ACPI_TYPE_POWER:
1894 * Create a placeholder device for this node. Sort the
1895 * placeholder so that the probe/attach passes will run
1896 * breadth-first. Orders less than ACPI_DEV_BASE_ORDER
1897 * are reserved for special objects (i.e., system
1900 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str));
1901 order = level * 10 + ACPI_DEV_BASE_ORDER;
1902 acpi_probe_order(handle, &order);
1903 child = BUS_ADD_CHILD(bus, order, NULL, -1);
1907 /* Associate the handle with the device_t and vice versa. */
1908 acpi_set_handle(child, handle);
1909 AcpiAttachData(handle, acpi_fake_objhandler, child);
1912 * Check that the device is present. If it's not present,
1913 * leave it disabled (so that we have a device_t attached to
1914 * the handle, but we don't probe it).
1916 * XXX PCI link devices sometimes report "present" but not
1917 * "functional" (i.e. if disabled). Go ahead and probe them
1918 * anyway since we may enable them later.
1920 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) {
1921 /* Never disable PCI link devices. */
1922 if (acpi_MatchHid(handle, "PNP0C0F"))
1925 * Docking stations should remain enabled since the system
1926 * may be undocked at boot.
1928 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h)))
1931 device_disable(child);
1936 * Get the device's resource settings and attach them.
1937 * Note that if the device has _PRS but no _CRS, we need
1938 * to decide when it's appropriate to try to configure the
1939 * device. Ignore the return value here; it's OK for the
1940 * device not to have any resources.
1942 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL);
1947 return_ACPI_STATUS (AE_OK);
1951 * AcpiAttachData() requires an object handler but never uses it. This is a
1952 * placeholder object handler so we can store a device_t in an ACPI_HANDLE.
1955 acpi_fake_objhandler(ACPI_HANDLE h, void *data)
1960 acpi_shutdown_final(void *arg, int howto)
1962 struct acpi_softc *sc = (struct acpi_softc *)arg;
1966 * XXX Shutdown code should only run on the BSP (cpuid 0).
1967 * Some chipsets do not power off the system correctly if called from
1970 if ((howto & RB_POWEROFF) != 0) {
1971 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5);
1972 if (ACPI_FAILURE(status)) {
1973 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n",
1974 AcpiFormatException(status));
1977 device_printf(sc->acpi_dev, "Powering system off\n");
1978 ACPI_DISABLE_IRQS();
1979 status = AcpiEnterSleepState(ACPI_STATE_S5);
1980 if (ACPI_FAILURE(status))
1981 device_printf(sc->acpi_dev, "power-off failed - %s\n",
1982 AcpiFormatException(status));
1985 device_printf(sc->acpi_dev, "power-off failed - timeout\n");
1987 } else if ((howto & RB_HALT) == 0 && sc->acpi_handle_reboot) {
1988 /* Reboot using the reset register. */
1989 status = AcpiReset();
1990 if (ACPI_SUCCESS(status)) {
1992 device_printf(sc->acpi_dev, "reset failed - timeout\n");
1993 } else if (status != AE_NOT_EXIST)
1994 device_printf(sc->acpi_dev, "reset failed - %s\n",
1995 AcpiFormatException(status));
1996 } else if (sc->acpi_do_disable && panicstr == NULL) {
1998 * Only disable ACPI if the user requested. On some systems, writing
1999 * the disable value to SMI_CMD hangs the system.
2001 device_printf(sc->acpi_dev, "Shutting down\n");
2007 acpi_enable_fixed_events(struct acpi_softc *sc)
2009 static int first_time = 1;
2011 /* Enable and clear fixed events and install handlers. */
2012 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) {
2013 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON);
2014 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON,
2015 acpi_event_power_button_sleep, sc);
2017 device_printf(sc->acpi_dev, "Power Button (fixed)\n");
2019 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) {
2020 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON);
2021 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON,
2022 acpi_event_sleep_button_sleep, sc);
2024 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n");
2031 * Returns true if the device is actually present and should
2032 * be attached to. This requires the present, enabled, UI-visible
2033 * and diagnostics-passed bits to be set.
2036 acpi_DeviceIsPresent(device_t dev)
2038 ACPI_DEVICE_INFO *devinfo;
2042 if ((h = acpi_get_handle(dev)) == NULL ||
2043 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
2046 /* If no _STA method, must be present */
2047 present = (devinfo->Valid & ACPI_VALID_STA) == 0 ||
2048 ACPI_DEVICE_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE;
2050 AcpiOsFree(devinfo);
2055 * Returns true if the battery is actually present and inserted.
2058 acpi_BatteryIsPresent(device_t dev)
2060 ACPI_DEVICE_INFO *devinfo;
2064 if ((h = acpi_get_handle(dev)) == NULL ||
2065 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
2068 /* If no _STA method, must be present */
2069 present = (devinfo->Valid & ACPI_VALID_STA) == 0 ||
2070 ACPI_BATTERY_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE;
2072 AcpiOsFree(devinfo);
2077 * Returns true if a device has at least one valid device ID.
2080 acpi_has_hid(ACPI_HANDLE h)
2082 ACPI_DEVICE_INFO *devinfo;
2086 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
2090 if ((devinfo->Valid & ACPI_VALID_HID) != 0)
2092 else if ((devinfo->Valid & ACPI_VALID_CID) != 0)
2093 if (devinfo->CompatibleIdList.Count > 0)
2096 AcpiOsFree(devinfo);
2101 * Match a HID string against a handle
2104 acpi_MatchHid(ACPI_HANDLE h, const char *hid)
2106 ACPI_DEVICE_INFO *devinfo;
2110 if (hid == NULL || h == NULL ||
2111 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
2115 if ((devinfo->Valid & ACPI_VALID_HID) != 0 &&
2116 strcmp(hid, devinfo->HardwareId.String) == 0)
2118 else if ((devinfo->Valid & ACPI_VALID_CID) != 0)
2119 for (i = 0; i < devinfo->CompatibleIdList.Count; i++) {
2120 if (strcmp(hid, devinfo->CompatibleIdList.Ids[i].String) == 0) {
2126 AcpiOsFree(devinfo);
2131 * Return the handle of a named object within our scope, ie. that of (parent)
2132 * or one if its parents.
2135 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result)
2140 /* Walk back up the tree to the root */
2142 status = AcpiGetHandle(parent, path, &r);
2143 if (ACPI_SUCCESS(status)) {
2147 /* XXX Return error here? */
2148 if (status != AE_NOT_FOUND)
2150 if (ACPI_FAILURE(AcpiGetParent(parent, &r)))
2151 return (AE_NOT_FOUND);
2157 * Allocate a buffer with a preset data size.
2160 acpi_AllocBuffer(int size)
2164 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL)
2167 buf->Pointer = (void *)(buf + 1);
2172 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number)
2175 ACPI_OBJECT_LIST args;
2177 arg1.Type = ACPI_TYPE_INTEGER;
2178 arg1.Integer.Value = number;
2180 args.Pointer = &arg1;
2182 return (AcpiEvaluateObject(handle, path, &args, NULL));
2186 * Evaluate a path that should return an integer.
2189 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number)
2196 handle = ACPI_ROOT_OBJECT;
2199 * Assume that what we've been pointed at is an Integer object, or
2200 * a method that will return an Integer.
2202 buf.Pointer = ¶m;
2203 buf.Length = sizeof(param);
2204 status = AcpiEvaluateObject(handle, path, NULL, &buf);
2205 if (ACPI_SUCCESS(status)) {
2206 if (param.Type == ACPI_TYPE_INTEGER)
2207 *number = param.Integer.Value;
2213 * In some applications, a method that's expected to return an Integer
2214 * may instead return a Buffer (probably to simplify some internal
2215 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer,
2216 * convert it into an Integer as best we can.
2220 if (status == AE_BUFFER_OVERFLOW) {
2221 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) {
2222 status = AE_NO_MEMORY;
2224 status = AcpiEvaluateObject(handle, path, NULL, &buf);
2225 if (ACPI_SUCCESS(status))
2226 status = acpi_ConvertBufferToInteger(&buf, number);
2227 AcpiOsFree(buf.Pointer);
2234 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number)
2240 p = (ACPI_OBJECT *)bufp->Pointer;
2241 if (p->Type == ACPI_TYPE_INTEGER) {
2242 *number = p->Integer.Value;
2245 if (p->Type != ACPI_TYPE_BUFFER)
2247 if (p->Buffer.Length > sizeof(int))
2248 return (AE_BAD_DATA);
2251 val = p->Buffer.Pointer;
2252 for (i = 0; i < p->Buffer.Length; i++)
2253 *number += val[i] << (i * 8);
2258 * Iterate over the elements of an a package object, calling the supplied
2259 * function for each element.
2261 * XXX possible enhancement might be to abort traversal on error.
2264 acpi_ForeachPackageObject(ACPI_OBJECT *pkg,
2265 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg)
2270 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE)
2271 return (AE_BAD_PARAMETER);
2273 /* Iterate over components */
2275 comp = pkg->Package.Elements;
2276 for (; i < pkg->Package.Count; i++, comp++)
2283 * Find the (index)th resource object in a set.
2286 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp)
2291 rp = (ACPI_RESOURCE *)buf->Pointer;
2295 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length))
2296 return (AE_BAD_PARAMETER);
2298 /* Check for terminator */
2299 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0)
2300 return (AE_NOT_FOUND);
2301 rp = ACPI_NEXT_RESOURCE(rp);
2310 * Append an ACPI_RESOURCE to an ACPI_BUFFER.
2312 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER
2313 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible
2314 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of
2317 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512
2320 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res)
2325 /* Initialise the buffer if necessary. */
2326 if (buf->Pointer == NULL) {
2327 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE;
2328 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL)
2329 return (AE_NO_MEMORY);
2330 rp = (ACPI_RESOURCE *)buf->Pointer;
2331 rp->Type = ACPI_RESOURCE_TYPE_END_TAG;
2338 * Scan the current buffer looking for the terminator.
2339 * This will either find the terminator or hit the end
2340 * of the buffer and return an error.
2342 rp = (ACPI_RESOURCE *)buf->Pointer;
2344 /* Range check, don't go outside the buffer */
2345 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length))
2346 return (AE_BAD_PARAMETER);
2347 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0)
2349 rp = ACPI_NEXT_RESOURCE(rp);
2353 * Check the size of the buffer and expand if required.
2356 * size of existing resources before terminator +
2357 * size of new resource and header +
2358 * size of terminator.
2360 * Note that this loop should really only run once, unless
2361 * for some reason we are stuffing a *really* huge resource.
2363 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) +
2364 res->Length + ACPI_RS_SIZE_NO_DATA +
2365 ACPI_RS_SIZE_MIN) >= buf->Length) {
2366 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL)
2367 return (AE_NO_MEMORY);
2368 bcopy(buf->Pointer, newp, buf->Length);
2369 rp = (ACPI_RESOURCE *)((u_int8_t *)newp +
2370 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer));
2371 AcpiOsFree(buf->Pointer);
2372 buf->Pointer = newp;
2373 buf->Length += buf->Length;
2376 /* Insert the new resource. */
2377 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA);
2379 /* And add the terminator. */
2380 rp = ACPI_NEXT_RESOURCE(rp);
2381 rp->Type = ACPI_RESOURCE_TYPE_END_TAG;
2388 * Set interrupt model.
2391 acpi_SetIntrModel(int model)
2394 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model));
2398 * Walk subtables of a table and call a callback routine for each
2399 * subtable. The caller should provide the first subtable and a
2400 * pointer to the end of the table. This can be used to walk tables
2401 * such as MADT and SRAT that use subtable entries.
2404 acpi_walk_subtables(void *first, void *end, acpi_subtable_handler *handler,
2407 ACPI_SUBTABLE_HEADER *entry;
2409 for (entry = first; (void *)entry < end; ) {
2410 /* Avoid an infinite loop if we hit a bogus entry. */
2411 if (entry->Length < sizeof(ACPI_SUBTABLE_HEADER))
2414 handler(entry, arg);
2415 entry = ACPI_ADD_PTR(ACPI_SUBTABLE_HEADER, entry, entry->Length);
2420 * DEPRECATED. This interface has serious deficiencies and will be
2423 * Immediately enter the sleep state. In the old model, acpiconf(8) ran
2424 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this.
2427 acpi_SetSleepState(struct acpi_softc *sc, int state)
2432 device_printf(sc->acpi_dev,
2433 "warning: acpi_SetSleepState() deprecated, need to update your software\n");
2436 return (acpi_EnterSleepState(sc, state));
2439 #if defined(__amd64__) || defined(__i386__)
2441 acpi_sleep_force_task(void *context)
2443 struct acpi_softc *sc = (struct acpi_softc *)context;
2445 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate)))
2446 device_printf(sc->acpi_dev, "force sleep state S%d failed\n",
2447 sc->acpi_next_sstate);
2451 acpi_sleep_force(void *arg)
2453 struct acpi_softc *sc = (struct acpi_softc *)arg;
2455 device_printf(sc->acpi_dev,
2456 "suspend request timed out, forcing sleep now\n");
2458 * XXX Suspending from callout cause the freeze in DEVICE_SUSPEND().
2459 * Suspend from acpi_task thread in stead.
2461 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER,
2462 acpi_sleep_force_task, sc)))
2463 device_printf(sc->acpi_dev, "AcpiOsExecute() for sleeping failed\n");
2468 * Request that the system enter the given suspend state. All /dev/apm
2469 * devices and devd(8) will be notified. Userland then has a chance to
2470 * save state and acknowledge the request. The system sleeps once all
2474 acpi_ReqSleepState(struct acpi_softc *sc, int state)
2476 #if defined(__amd64__) || defined(__i386__)
2477 struct apm_clone_data *clone;
2480 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX)
2482 if (!acpi_sleep_states[state])
2483 return (EOPNOTSUPP);
2485 /* If a suspend request is already in progress, just return. */
2486 if (sc->acpi_next_sstate != 0) {
2490 /* Wait until sleep is enabled. */
2491 while (sc->acpi_sleep_disabled) {
2497 sc->acpi_next_sstate = state;
2499 /* S5 (soft-off) should be entered directly with no waiting. */
2500 if (state == ACPI_STATE_S5) {
2502 status = acpi_EnterSleepState(sc, state);
2503 return (ACPI_SUCCESS(status) ? 0 : ENXIO);
2506 /* Record the pending state and notify all apm devices. */
2507 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) {
2508 clone->notify_status = APM_EV_NONE;
2509 if ((clone->flags & ACPI_EVF_DEVD) == 0) {
2510 selwakeuppri(&clone->sel_read, PZERO);
2511 KNOTE_LOCKED(&clone->sel_read.si_note, 0);
2515 /* If devd(8) is not running, immediately enter the sleep state. */
2516 if (!devctl_process_running()) {
2518 status = acpi_EnterSleepState(sc, state);
2519 return (ACPI_SUCCESS(status) ? 0 : ENXIO);
2523 * Set a timeout to fire if userland doesn't ack the suspend request
2524 * in time. This way we still eventually go to sleep if we were
2525 * overheating or running low on battery, even if userland is hung.
2526 * We cancel this timeout once all userland acks are in or the
2527 * suspend request is aborted.
2529 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc);
2532 /* Now notify devd(8) also. */
2533 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state);
2537 /* This platform does not support acpi suspend/resume. */
2538 return (EOPNOTSUPP);
2543 * Acknowledge (or reject) a pending sleep state. The caller has
2544 * prepared for suspend and is now ready for it to proceed. If the
2545 * error argument is non-zero, it indicates suspend should be cancelled
2546 * and gives an errno value describing why. Once all votes are in,
2547 * we suspend the system.
2550 acpi_AckSleepState(struct apm_clone_data *clone, int error)
2552 #if defined(__amd64__) || defined(__i386__)
2553 struct acpi_softc *sc;
2556 /* If no pending sleep state, return an error. */
2558 sc = clone->acpi_sc;
2559 if (sc->acpi_next_sstate == 0) {
2564 /* Caller wants to abort suspend process. */
2566 sc->acpi_next_sstate = 0;
2567 callout_stop(&sc->susp_force_to);
2568 device_printf(sc->acpi_dev,
2569 "listener on %s cancelled the pending suspend\n",
2570 devtoname(clone->cdev));
2576 * Mark this device as acking the suspend request. Then, walk through
2577 * all devices, seeing if they agree yet. We only count devices that
2578 * are writable since read-only devices couldn't ack the request.
2581 clone->notify_status = APM_EV_ACKED;
2582 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) {
2583 if ((clone->flags & ACPI_EVF_WRITE) != 0 &&
2584 clone->notify_status != APM_EV_ACKED) {
2590 /* If all devices have voted "yes", we will suspend now. */
2592 callout_stop(&sc->susp_force_to);
2596 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate)))
2601 /* This platform does not support acpi suspend/resume. */
2602 return (EOPNOTSUPP);
2607 acpi_sleep_enable(void *arg)
2609 struct acpi_softc *sc = (struct acpi_softc *)arg;
2611 /* Reschedule if the system is not fully up and running. */
2612 if (!AcpiGbl_SystemAwakeAndRunning) {
2613 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME);
2618 sc->acpi_sleep_disabled = FALSE;
2623 acpi_sleep_disable(struct acpi_softc *sc)
2627 /* Fail if the system is not fully up and running. */
2628 if (!AcpiGbl_SystemAwakeAndRunning)
2632 status = sc->acpi_sleep_disabled ? AE_ERROR : AE_OK;
2633 sc->acpi_sleep_disabled = TRUE;
2639 enum acpi_sleep_state {
2642 ACPI_SS_DEV_SUSPEND,
2648 * Enter the desired system sleep state.
2650 * Currently we support S1-S5 but S4 is only S4BIOS
2653 acpi_EnterSleepState(struct acpi_softc *sc, int state)
2656 enum acpi_sleep_state slp_state;
2658 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
2660 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX)
2661 return_ACPI_STATUS (AE_BAD_PARAMETER);
2662 if (!acpi_sleep_states[state]) {
2663 device_printf(sc->acpi_dev, "Sleep state S%d not supported by BIOS\n",
2665 return (AE_SUPPORT);
2668 /* Re-entry once we're suspending is not allowed. */
2669 status = acpi_sleep_disable(sc);
2670 if (ACPI_FAILURE(status)) {
2671 device_printf(sc->acpi_dev,
2672 "suspend request ignored (not ready yet)\n");
2676 if (state == ACPI_STATE_S5) {
2678 * Shut down cleanly and power off. This will call us back through the
2679 * shutdown handlers.
2681 shutdown_nice(RB_POWEROFF);
2682 return_ACPI_STATUS (AE_OK);
2685 EVENTHANDLER_INVOKE(power_suspend);
2688 thread_lock(curthread);
2689 sched_bind(curthread, 0);
2690 thread_unlock(curthread);
2694 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE
2695 * drivers need this.
2699 slp_state = ACPI_SS_NONE;
2701 sc->acpi_sstate = state;
2703 /* Enable any GPEs as appropriate and requested by the user. */
2704 acpi_wake_prep_walk(state);
2705 slp_state = ACPI_SS_GPE_SET;
2708 * Inform all devices that we are going to sleep. If at least one
2709 * device fails, DEVICE_SUSPEND() automatically resumes the tree.
2711 * XXX Note that a better two-pass approach with a 'veto' pass
2712 * followed by a "real thing" pass would be better, but the current
2713 * bus interface does not provide for this.
2715 if (DEVICE_SUSPEND(root_bus) != 0) {
2716 device_printf(sc->acpi_dev, "device_suspend failed\n");
2719 slp_state = ACPI_SS_DEV_SUSPEND;
2721 /* If testing device suspend only, back out of everything here. */
2722 if (acpi_susp_bounce)
2725 status = AcpiEnterSleepStatePrep(state);
2726 if (ACPI_FAILURE(status)) {
2727 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n",
2728 AcpiFormatException(status));
2731 slp_state = ACPI_SS_SLP_PREP;
2733 if (sc->acpi_sleep_delay > 0)
2734 DELAY(sc->acpi_sleep_delay * 1000000);
2736 if (state != ACPI_STATE_S1) {
2737 acpi_sleep_machdep(sc, state);
2739 /* Re-enable ACPI hardware on wakeup from sleep state 4. */
2740 if (state == ACPI_STATE_S4)
2743 ACPI_DISABLE_IRQS();
2744 status = AcpiEnterSleepState(state);
2745 if (ACPI_FAILURE(status)) {
2746 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n",
2747 AcpiFormatException(status));
2751 slp_state = ACPI_SS_SLEPT;
2754 * Back out state according to how far along we got in the suspend
2755 * process. This handles both the error and success cases.
2758 if (slp_state >= ACPI_SS_GPE_SET) {
2759 acpi_wake_prep_walk(state);
2760 sc->acpi_sstate = ACPI_STATE_S0;
2762 if (slp_state >= ACPI_SS_DEV_SUSPEND)
2763 DEVICE_RESUME(root_bus);
2764 if (slp_state >= ACPI_SS_SLP_PREP)
2765 AcpiLeaveSleepState(state);
2766 if (slp_state >= ACPI_SS_SLEPT) {
2767 acpi_resync_clock(sc);
2768 acpi_enable_fixed_events(sc);
2770 sc->acpi_next_sstate = 0;
2775 thread_lock(curthread);
2776 sched_unbind(curthread);
2777 thread_unlock(curthread);
2780 EVENTHANDLER_INVOKE(power_resume);
2782 /* Allow another sleep request after a while. */
2783 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME);
2785 /* Run /etc/rc.resume after we are back. */
2786 if (devctl_process_running())
2787 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state);
2789 return_ACPI_STATUS (status);
2793 acpi_resync_clock(struct acpi_softc *sc)
2796 if (!acpi_reset_clock)
2800 * Warm up timecounter again and reset system clock.
2802 (void)timecounter->tc_get_timecount(timecounter);
2803 (void)timecounter->tc_get_timecount(timecounter);
2804 inittodr(time_second + sc->acpi_sleep_delay);
2808 /* Enable or disable the device's wake GPE. */
2810 acpi_wake_set_enable(device_t dev, int enable)
2812 struct acpi_prw_data prw;
2816 /* Make sure the device supports waking the system and get the GPE. */
2817 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0)
2820 flags = acpi_get_flags(dev);
2822 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit,
2824 if (ACPI_FAILURE(status)) {
2825 device_printf(dev, "enable wake failed\n");
2828 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED);
2830 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit,
2832 if (ACPI_FAILURE(status)) {
2833 device_printf(dev, "disable wake failed\n");
2836 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED);
2843 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate)
2845 struct acpi_prw_data prw;
2848 /* Check that this is a wake-capable device and get its GPE. */
2849 if (acpi_parse_prw(handle, &prw) != 0)
2851 dev = acpi_get_device(handle);
2854 * The destination sleep state must be less than (i.e., higher power)
2855 * or equal to the value specified by _PRW. If this GPE cannot be
2856 * enabled for the next sleep state, then disable it. If it can and
2857 * the user requested it be enabled, turn on any required power resources
2860 if (sstate > prw.lowest_wake) {
2861 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_DISABLE);
2863 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n",
2864 acpi_name(handle), sstate);
2865 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) {
2866 acpi_pwr_wake_enable(handle, 1);
2867 acpi_SetInteger(handle, "_PSW", 1);
2869 device_printf(dev, "wake_prep enabled for %s (S%d)\n",
2870 acpi_name(handle), sstate);
2877 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate)
2879 struct acpi_prw_data prw;
2883 * Check that this is a wake-capable device and get its GPE. Return
2884 * now if the user didn't enable this device for wake.
2886 if (acpi_parse_prw(handle, &prw) != 0)
2888 dev = acpi_get_device(handle);
2889 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0)
2893 * If this GPE couldn't be enabled for the previous sleep state, it was
2894 * disabled before going to sleep so re-enable it. If it was enabled,
2895 * clear _PSW and turn off any power resources it used.
2897 if (sstate > prw.lowest_wake) {
2898 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_ENABLE);
2900 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle));
2902 acpi_SetInteger(handle, "_PSW", 0);
2903 acpi_pwr_wake_enable(handle, 0);
2905 device_printf(dev, "run_prep cleaned up for %s\n",
2913 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status)
2917 /* If suspending, run the sleep prep function, otherwise wake. */
2918 sstate = *(int *)context;
2919 if (AcpiGbl_SystemAwakeAndRunning)
2920 acpi_wake_sleep_prep(handle, sstate);
2922 acpi_wake_run_prep(handle, sstate);
2926 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */
2928 acpi_wake_prep_walk(int sstate)
2930 ACPI_HANDLE sb_handle;
2932 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle)))
2933 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100,
2934 acpi_wake_prep, NULL, &sstate, NULL);
2938 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */
2940 acpi_wake_sysctl_walk(device_t dev)
2942 int error, i, numdevs;
2947 error = device_get_children(dev, &devlist, &numdevs);
2948 if (error != 0 || numdevs == 0) {
2950 free(devlist, M_TEMP);
2953 for (i = 0; i < numdevs; i++) {
2955 acpi_wake_sysctl_walk(child);
2956 if (!device_is_attached(child))
2958 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL);
2959 if (ACPI_SUCCESS(status)) {
2960 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child),
2961 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO,
2962 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0,
2963 acpi_wake_set_sysctl, "I", "Device set to wake the system");
2966 free(devlist, M_TEMP);
2971 /* Enable or disable wake from userland. */
2973 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS)
2978 dev = (device_t)arg1;
2979 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0;
2981 error = sysctl_handle_int(oidp, &enable, 0, req);
2982 if (error != 0 || req->newptr == NULL)
2984 if (enable != 0 && enable != 1)
2987 return (acpi_wake_set_enable(dev, enable));
2990 /* Parse a device's _PRW into a structure. */
2992 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw)
2995 ACPI_BUFFER prw_buffer;
2996 ACPI_OBJECT *res, *res2;
2997 int error, i, power_count;
2999 if (h == NULL || prw == NULL)
3003 * The _PRW object (7.2.9) is only required for devices that have the
3004 * ability to wake the system from a sleeping state.
3007 prw_buffer.Pointer = NULL;
3008 prw_buffer.Length = ACPI_ALLOCATE_BUFFER;
3009 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer);
3010 if (ACPI_FAILURE(status))
3012 res = (ACPI_OBJECT *)prw_buffer.Pointer;
3015 if (!ACPI_PKG_VALID(res, 2))
3019 * Element 1 of the _PRW object:
3020 * The lowest power system sleeping state that can be entered while still
3021 * providing wake functionality. The sleeping state being entered must
3022 * be less than (i.e., higher power) or equal to this value.
3024 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0)
3028 * Element 0 of the _PRW object:
3030 switch (res->Package.Elements[0].Type) {
3031 case ACPI_TYPE_INTEGER:
3033 * If the data type of this package element is numeric, then this
3034 * _PRW package element is the bit index in the GPEx_EN, in the
3035 * GPE blocks described in the FADT, of the enable bit that is
3036 * enabled for the wake event.
3038 prw->gpe_handle = NULL;
3039 prw->gpe_bit = res->Package.Elements[0].Integer.Value;
3042 case ACPI_TYPE_PACKAGE:
3044 * If the data type of this package element is a package, then this
3045 * _PRW package element is itself a package containing two
3046 * elements. The first is an object reference to the GPE Block
3047 * device that contains the GPE that will be triggered by the wake
3048 * event. The second element is numeric and it contains the bit
3049 * index in the GPEx_EN, in the GPE Block referenced by the
3050 * first element in the package, of the enable bit that is enabled for
3053 * For example, if this field is a package then it is of the form:
3054 * Package() {\_SB.PCI0.ISA.GPE, 2}
3056 res2 = &res->Package.Elements[0];
3057 if (!ACPI_PKG_VALID(res2, 2))
3059 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]);
3060 if (prw->gpe_handle == NULL)
3062 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0)
3070 /* Elements 2 to N of the _PRW object are power resources. */
3071 power_count = res->Package.Count - 2;
3072 if (power_count > ACPI_PRW_MAX_POWERRES) {
3073 printf("ACPI device %s has too many power resources\n", acpi_name(h));
3076 prw->power_res_count = power_count;
3077 for (i = 0; i < power_count; i++)
3078 prw->power_res[i] = res->Package.Elements[i];
3081 if (prw_buffer.Pointer != NULL)
3082 AcpiOsFree(prw_buffer.Pointer);
3087 * ACPI Event Handlers
3090 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */
3093 acpi_system_eventhandler_sleep(void *arg, int state)
3095 struct acpi_softc *sc = (struct acpi_softc *)arg;
3098 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
3100 /* Check if button action is disabled or unknown. */
3101 if (state == ACPI_STATE_UNKNOWN)
3104 /* Request that the system prepare to enter the given suspend state. */
3105 ret = acpi_ReqSleepState(sc, state);
3107 device_printf(sc->acpi_dev,
3108 "request to enter state S%d failed (err %d)\n", state, ret);
3114 acpi_system_eventhandler_wakeup(void *arg, int state)
3117 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
3119 /* Currently, nothing to do for wakeup. */
3125 * ACPICA Event Handlers (FixedEvent, also called from button notify handler)
3128 acpi_invoke_sleep_eventhandler(void *context)
3131 EVENTHANDLER_INVOKE(acpi_sleep_event, *(int *)context);
3135 acpi_invoke_wake_eventhandler(void *context)
3138 EVENTHANDLER_INVOKE(acpi_wakeup_event, *(int *)context);
3142 acpi_event_power_button_sleep(void *context)
3144 struct acpi_softc *sc = (struct acpi_softc *)context;
3146 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
3148 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER,
3149 acpi_invoke_sleep_eventhandler, &sc->acpi_power_button_sx)))
3150 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
3151 return_VALUE (ACPI_INTERRUPT_HANDLED);
3155 acpi_event_power_button_wake(void *context)
3157 struct acpi_softc *sc = (struct acpi_softc *)context;
3159 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
3161 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER,
3162 acpi_invoke_wake_eventhandler, &sc->acpi_power_button_sx)))
3163 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
3164 return_VALUE (ACPI_INTERRUPT_HANDLED);
3168 acpi_event_sleep_button_sleep(void *context)
3170 struct acpi_softc *sc = (struct acpi_softc *)context;
3172 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
3174 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER,
3175 acpi_invoke_sleep_eventhandler, &sc->acpi_sleep_button_sx)))
3176 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
3177 return_VALUE (ACPI_INTERRUPT_HANDLED);
3181 acpi_event_sleep_button_wake(void *context)
3183 struct acpi_softc *sc = (struct acpi_softc *)context;
3185 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
3187 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER,
3188 acpi_invoke_wake_eventhandler, &sc->acpi_sleep_button_sx)))
3189 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
3190 return_VALUE (ACPI_INTERRUPT_HANDLED);
3194 * XXX This static buffer is suboptimal. There is no locking so only
3195 * use this for single-threaded callers.
3198 acpi_name(ACPI_HANDLE handle)
3201 static char data[256];
3203 buf.Length = sizeof(data);
3206 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf)))
3208 return ("(unknown)");
3212 * Debugging/bug-avoidance. Avoid trying to fetch info on various
3213 * parts of the namespace.
3216 acpi_avoid(ACPI_HANDLE handle)
3218 char *cp, *env, *np;
3221 np = acpi_name(handle);
3224 if ((env = getenv("debug.acpi.avoid")) == NULL)
3227 /* Scan the avoid list checking for a match */
3230 while (*cp != 0 && isspace(*cp))
3235 while (cp[len] != 0 && !isspace(cp[len]))
3237 if (!strncmp(cp, np, len)) {
3249 * Debugging/bug-avoidance. Disable ACPI subsystem components.
3252 acpi_disabled(char *subsys)
3257 if ((env = getenv("debug.acpi.disabled")) == NULL)
3259 if (strcmp(env, "all") == 0) {
3264 /* Scan the disable list, checking for a match. */
3267 while (*cp != '\0' && isspace(*cp))
3272 while (cp[len] != '\0' && !isspace(cp[len]))
3274 if (strncmp(cp, subsys, len) == 0) {
3286 * Control interface.
3288 * We multiplex ioctls for all participating ACPI devices here. Individual
3289 * drivers wanting to be accessible via /dev/acpi should use the
3290 * register/deregister interface to make their handlers visible.
3292 struct acpi_ioctl_hook
3294 TAILQ_ENTRY(acpi_ioctl_hook) link;
3300 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks;
3301 static int acpi_ioctl_hooks_initted;
3304 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg)
3306 struct acpi_ioctl_hook *hp;
3308 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL)
3315 if (acpi_ioctl_hooks_initted == 0) {
3316 TAILQ_INIT(&acpi_ioctl_hooks);
3317 acpi_ioctl_hooks_initted = 1;
3319 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link);
3326 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn)
3328 struct acpi_ioctl_hook *hp;
3331 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link)
3332 if (hp->cmd == cmd && hp->fn == fn)
3336 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link);
3337 free(hp, M_ACPIDEV);
3343 acpiopen(struct cdev *dev, int flag, int fmt, struct thread *td)
3349 acpiclose(struct cdev *dev, int flag, int fmt, struct thread *td)
3355 acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
3357 struct acpi_softc *sc;
3358 struct acpi_ioctl_hook *hp;
3366 * Scan the list of registered ioctls, looking for handlers.
3369 if (acpi_ioctl_hooks_initted)
3370 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) {
3376 return (hp->fn(cmd, addr, hp->arg));
3379 * Core ioctls are not permitted for non-writable user.
3380 * Currently, other ioctls just fetch information.
3381 * Not changing system behavior.
3383 if ((flag & FWRITE) == 0)
3386 /* Core system ioctls. */
3388 case ACPIIO_REQSLPSTATE:
3389 state = *(int *)addr;
3390 if (state != ACPI_STATE_S5)
3391 return (acpi_ReqSleepState(sc, state));
3392 device_printf(sc->acpi_dev, "power off via acpi ioctl not supported\n");
3395 case ACPIIO_ACKSLPSTATE:
3396 error = *(int *)addr;
3397 error = acpi_AckSleepState(sc->acpi_clone, error);
3399 case ACPIIO_SETSLPSTATE: /* DEPRECATED */
3400 state = *(int *)addr;
3401 if (state < ACPI_STATE_S0 || state > ACPI_S_STATES_MAX)
3403 if (!acpi_sleep_states[state])
3404 return (EOPNOTSUPP);
3405 if (ACPI_FAILURE(acpi_SetSleepState(sc, state)))
3417 acpi_sname2sstate(const char *sname)
3421 if (toupper(sname[0]) == 'S') {
3422 sstate = sname[1] - '0';
3423 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5 &&
3426 } else if (strcasecmp(sname, "NONE") == 0)
3427 return (ACPI_STATE_UNKNOWN);
3432 acpi_sstate2sname(int sstate)
3434 static const char *snames[] = { "S0", "S1", "S2", "S3", "S4", "S5" };
3436 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5)
3437 return (snames[sstate]);
3438 else if (sstate == ACPI_STATE_UNKNOWN)
3444 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
3450 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND);
3451 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++)
3452 if (acpi_sleep_states[state])
3453 sbuf_printf(&sb, "%s ", acpi_sstate2sname(state));
3456 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req);
3462 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
3464 char sleep_state[10];
3465 int error, new_state, old_state;
3467 old_state = *(int *)oidp->oid_arg1;
3468 strlcpy(sleep_state, acpi_sstate2sname(old_state), sizeof(sleep_state));
3469 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req);
3470 if (error == 0 && req->newptr != NULL) {
3471 new_state = acpi_sname2sstate(sleep_state);
3472 if (new_state < ACPI_STATE_S1)
3474 if (new_state < ACPI_S_STATE_COUNT && !acpi_sleep_states[new_state])
3475 return (EOPNOTSUPP);
3476 if (new_state != old_state)
3477 *(int *)oidp->oid_arg1 = new_state;
3482 /* Inform devctl(4) when we receive a Notify. */
3484 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify)
3486 char notify_buf[16];
3487 ACPI_BUFFER handle_buf;
3490 if (subsystem == NULL)
3493 handle_buf.Pointer = NULL;
3494 handle_buf.Length = ACPI_ALLOCATE_BUFFER;
3495 status = AcpiNsHandleToPathname(h, &handle_buf);
3496 if (ACPI_FAILURE(status))
3498 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify);
3499 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf);
3500 AcpiOsFree(handle_buf.Pointer);
3505 * Support for parsing debug options from the kernel environment.
3507 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers
3508 * by specifying the names of the bits in the debug.acpi.layer and
3509 * debug.acpi.level environment variables. Bits may be unset by
3510 * prefixing the bit name with !.
3518 static struct debugtag dbg_layer[] = {
3519 {"ACPI_UTILITIES", ACPI_UTILITIES},
3520 {"ACPI_HARDWARE", ACPI_HARDWARE},
3521 {"ACPI_EVENTS", ACPI_EVENTS},
3522 {"ACPI_TABLES", ACPI_TABLES},
3523 {"ACPI_NAMESPACE", ACPI_NAMESPACE},
3524 {"ACPI_PARSER", ACPI_PARSER},
3525 {"ACPI_DISPATCHER", ACPI_DISPATCHER},
3526 {"ACPI_EXECUTER", ACPI_EXECUTER},
3527 {"ACPI_RESOURCES", ACPI_RESOURCES},
3528 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER},
3529 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES},
3530 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER},
3531 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS},
3533 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER},
3534 {"ACPI_BATTERY", ACPI_BATTERY},
3535 {"ACPI_BUS", ACPI_BUS},
3536 {"ACPI_BUTTON", ACPI_BUTTON},
3537 {"ACPI_EC", ACPI_EC},
3538 {"ACPI_FAN", ACPI_FAN},
3539 {"ACPI_POWERRES", ACPI_POWERRES},
3540 {"ACPI_PROCESSOR", ACPI_PROCESSOR},
3541 {"ACPI_THERMAL", ACPI_THERMAL},
3542 {"ACPI_TIMER", ACPI_TIMER},
3543 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS},
3547 static struct debugtag dbg_level[] = {
3548 {"ACPI_LV_INIT", ACPI_LV_INIT},
3549 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT},
3550 {"ACPI_LV_INFO", ACPI_LV_INFO},
3551 {"ACPI_LV_REPAIR", ACPI_LV_REPAIR},
3552 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS},
3554 /* Trace verbosity level 1 [Standard Trace Level] */
3555 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES},
3556 {"ACPI_LV_PARSE", ACPI_LV_PARSE},
3557 {"ACPI_LV_LOAD", ACPI_LV_LOAD},
3558 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH},
3559 {"ACPI_LV_EXEC", ACPI_LV_EXEC},
3560 {"ACPI_LV_NAMES", ACPI_LV_NAMES},
3561 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION},
3562 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD},
3563 {"ACPI_LV_TABLES", ACPI_LV_TABLES},
3564 {"ACPI_LV_VALUES", ACPI_LV_VALUES},
3565 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS},
3566 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES},
3567 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS},
3568 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE},
3569 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1},
3571 /* Trace verbosity level 2 [Function tracing and memory allocation] */
3572 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS},
3573 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS},
3574 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS},
3575 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2},
3576 {"ACPI_LV_ALL", ACPI_LV_ALL},
3578 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */
3579 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX},
3580 {"ACPI_LV_THREADS", ACPI_LV_THREADS},
3581 {"ACPI_LV_IO", ACPI_LV_IO},
3582 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS},
3583 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3},
3585 /* Exceptionally verbose output -- also used in the global "DebugLevel" */
3586 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE},
3587 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO},
3588 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES},
3589 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS},
3590 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE},
3595 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag)
3607 while (*ep && !isspace(*ep))
3618 for (i = 0; tag[i].name != NULL; i++) {
3619 if (!strncmp(cp, tag[i].name, l)) {
3621 *flag |= tag[i].value;
3623 *flag &= ~tag[i].value;
3631 acpi_set_debugging(void *junk)
3633 char *layer, *level;
3640 layer = getenv("debug.acpi.layer");
3641 level = getenv("debug.acpi.level");
3642 if (layer == NULL && level == NULL)
3645 printf("ACPI set debug");
3646 if (layer != NULL) {
3647 if (strcmp("NONE", layer) != 0)
3648 printf(" layer '%s'", layer);
3649 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer);
3652 if (level != NULL) {
3653 if (strcmp("NONE", level) != 0)
3654 printf(" level '%s'", level);
3655 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel);
3661 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging,
3665 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS)
3668 struct debugtag *tag;
3671 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL)
3673 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) {
3674 tag = &dbg_layer[0];
3675 dbg = &AcpiDbgLayer;
3677 tag = &dbg_level[0];
3678 dbg = &AcpiDbgLevel;
3681 /* Get old values if this is a get request. */
3682 ACPI_SERIAL_BEGIN(acpi);
3684 sbuf_cpy(&sb, "NONE");
3685 } else if (req->newptr == NULL) {
3686 for (; tag->name != NULL; tag++) {
3687 if ((*dbg & tag->value) == tag->value)
3688 sbuf_printf(&sb, "%s ", tag->name);
3694 /* Copy out the old values to the user. */
3695 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb));
3698 /* If the user is setting a string, parse it. */
3699 if (error == 0 && req->newptr != NULL) {
3701 setenv((char *)oidp->oid_arg1, (char *)req->newptr);
3702 acpi_set_debugging(NULL);
3704 ACPI_SERIAL_END(acpi);
3709 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING,
3710 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", "");
3711 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING,
3712 "debug.acpi.level", 0, acpi_debug_sysctl, "A", "");
3713 #endif /* ACPI_DEBUG */
3716 acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS)
3721 old = acpi_debug_objects;
3722 error = sysctl_handle_int(oidp, &acpi_debug_objects, 0, req);
3723 if (error != 0 || req->newptr == NULL)
3725 if (old == acpi_debug_objects || (old && acpi_debug_objects))
3728 ACPI_SERIAL_BEGIN(acpi);
3729 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE;
3730 ACPI_SERIAL_END(acpi);
3736 acpi_parse_interfaces(char *str, struct acpi_interface *iface)
3743 while (isspace(*p) || *p == ',')
3748 p = strdup(p, M_TEMP);
3749 for (i = 0; i < len; i++)
3754 if (isspace(p[i]) || p[i] == '\0')
3757 i += strlen(p + i) + 1;
3764 iface->data = malloc(sizeof(*iface->data) * j, M_TEMP, M_WAITOK);
3768 if (isspace(p[i]) || p[i] == '\0')
3771 iface->data[j] = p + i;
3772 i += strlen(p + i) + 1;
3780 acpi_free_interfaces(struct acpi_interface *iface)
3783 free(iface->data[0], M_TEMP);
3784 free(iface->data, M_TEMP);
3788 acpi_reset_interfaces(device_t dev)
3790 struct acpi_interface list;
3794 if (acpi_parse_interfaces(acpi_install_interface, &list) > 0) {
3795 for (i = 0; i < list.num; i++) {
3796 status = AcpiInstallInterface(list.data[i]);
3797 if (ACPI_FAILURE(status))
3799 "failed to install _OSI(\"%s\"): %s\n",
3800 list.data[i], AcpiFormatException(status));
3801 else if (bootverbose)
3802 device_printf(dev, "installed _OSI(\"%s\")\n",
3805 acpi_free_interfaces(&list);
3807 if (acpi_parse_interfaces(acpi_remove_interface, &list) > 0) {
3808 for (i = 0; i < list.num; i++) {
3809 status = AcpiRemoveInterface(list.data[i]);
3810 if (ACPI_FAILURE(status))
3812 "failed to remove _OSI(\"%s\"): %s\n",
3813 list.data[i], AcpiFormatException(status));
3814 else if (bootverbose)
3815 device_printf(dev, "removed _OSI(\"%s\")\n",
3818 acpi_free_interfaces(&list);
3823 acpi_pm_func(u_long cmd, void *arg, ...)
3825 int state, acpi_state;
3827 struct acpi_softc *sc;
3832 case POWER_CMD_SUSPEND:
3833 sc = (struct acpi_softc *)arg;
3840 state = va_arg(ap, int);
3844 case POWER_SLEEP_STATE_STANDBY:
3845 acpi_state = sc->acpi_standby_sx;
3847 case POWER_SLEEP_STATE_SUSPEND:
3848 acpi_state = sc->acpi_suspend_sx;
3850 case POWER_SLEEP_STATE_HIBERNATE:
3851 acpi_state = ACPI_STATE_S4;
3858 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state)))
3871 acpi_pm_register(void *arg)
3873 if (!cold || resource_disabled("acpi", 0))
3876 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL);
3879 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0);