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 static 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;
96 struct callout acpi_sleep_timer;
98 /* Bitmap of device quirks. */
101 /* Supported sleep states. */
102 static BOOLEAN acpi_sleep_states[ACPI_S_STATE_COUNT];
104 static void acpi_lookup(void *arg, const char *name, device_t *dev);
105 static int acpi_modevent(struct module *mod, int event, void *junk);
106 static int acpi_probe(device_t dev);
107 static int acpi_attach(device_t dev);
108 static int acpi_suspend(device_t dev);
109 static int acpi_resume(device_t dev);
110 static int acpi_shutdown(device_t dev);
111 static device_t acpi_add_child(device_t bus, u_int order, const char *name,
113 static int acpi_print_child(device_t bus, device_t child);
114 static void acpi_probe_nomatch(device_t bus, device_t child);
115 static void acpi_driver_added(device_t dev, driver_t *driver);
116 static int acpi_read_ivar(device_t dev, device_t child, int index,
118 static int acpi_write_ivar(device_t dev, device_t child, int index,
120 static struct resource_list *acpi_get_rlist(device_t dev, device_t child);
121 static void acpi_reserve_resources(device_t dev);
122 static int acpi_sysres_alloc(device_t dev);
123 static int acpi_set_resource(device_t dev, device_t child, int type,
124 int rid, u_long start, u_long count);
125 static struct resource *acpi_alloc_resource(device_t bus, device_t child,
126 int type, int *rid, u_long start, u_long end,
127 u_long count, u_int flags);
128 static int acpi_adjust_resource(device_t bus, device_t child, int type,
129 struct resource *r, u_long start, u_long end);
130 static int acpi_release_resource(device_t bus, device_t child, int type,
131 int rid, struct resource *r);
132 static void acpi_delete_resource(device_t bus, device_t child, int type,
134 static uint32_t acpi_isa_get_logicalid(device_t dev);
135 static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count);
136 static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids);
137 static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev,
138 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters,
140 static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level,
141 void *context, void **retval);
142 static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev,
143 int max_depth, acpi_scan_cb_t user_fn, void *arg);
144 static int acpi_set_powerstate(device_t child, int state);
145 static int acpi_isa_pnp_probe(device_t bus, device_t child,
146 struct isa_pnp_id *ids);
147 static void acpi_probe_children(device_t bus);
148 static void acpi_probe_order(ACPI_HANDLE handle, int *order);
149 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level,
150 void *context, void **status);
151 static void acpi_sleep_enable(void *arg);
152 static ACPI_STATUS acpi_sleep_disable(struct acpi_softc *sc);
153 static ACPI_STATUS acpi_EnterSleepState(struct acpi_softc *sc, int state);
154 static void acpi_shutdown_final(void *arg, int howto);
155 static void acpi_enable_fixed_events(struct acpi_softc *sc);
156 static BOOLEAN acpi_has_hid(ACPI_HANDLE handle);
157 static void acpi_resync_clock(struct acpi_softc *sc);
158 static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate);
159 static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate);
160 static int acpi_wake_prep_walk(int sstate);
161 static int acpi_wake_sysctl_walk(device_t dev);
162 static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS);
163 static void acpi_system_eventhandler_sleep(void *arg, int state);
164 static void acpi_system_eventhandler_wakeup(void *arg, int state);
165 static int acpi_sname2sstate(const char *sname);
166 static const char *acpi_sstate2sname(int sstate);
167 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS);
168 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS);
169 static int acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS);
170 static int acpi_pm_func(u_long cmd, void *arg, ...);
171 static int acpi_child_location_str_method(device_t acdev, device_t child,
172 char *buf, size_t buflen);
173 static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child,
174 char *buf, size_t buflen);
175 #if defined(__i386__) || defined(__amd64__)
176 static void acpi_enable_pcie(void);
178 static void acpi_hint_device_unit(device_t acdev, device_t child,
179 const char *name, int *unitp);
180 static void acpi_reset_interfaces(device_t dev);
182 static device_method_t acpi_methods[] = {
183 /* Device interface */
184 DEVMETHOD(device_probe, acpi_probe),
185 DEVMETHOD(device_attach, acpi_attach),
186 DEVMETHOD(device_shutdown, acpi_shutdown),
187 DEVMETHOD(device_detach, bus_generic_detach),
188 DEVMETHOD(device_suspend, acpi_suspend),
189 DEVMETHOD(device_resume, acpi_resume),
192 DEVMETHOD(bus_add_child, acpi_add_child),
193 DEVMETHOD(bus_print_child, acpi_print_child),
194 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch),
195 DEVMETHOD(bus_driver_added, acpi_driver_added),
196 DEVMETHOD(bus_read_ivar, acpi_read_ivar),
197 DEVMETHOD(bus_write_ivar, acpi_write_ivar),
198 DEVMETHOD(bus_get_resource_list, acpi_get_rlist),
199 DEVMETHOD(bus_set_resource, acpi_set_resource),
200 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
201 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource),
202 DEVMETHOD(bus_adjust_resource, acpi_adjust_resource),
203 DEVMETHOD(bus_release_resource, acpi_release_resource),
204 DEVMETHOD(bus_delete_resource, acpi_delete_resource),
205 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method),
206 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method),
207 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
208 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
209 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
210 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
211 DEVMETHOD(bus_hint_device_unit, acpi_hint_device_unit),
212 DEVMETHOD(bus_get_domain, acpi_get_domain),
215 DEVMETHOD(acpi_id_probe, acpi_device_id_probe),
216 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj),
217 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep),
218 DEVMETHOD(acpi_scan_children, acpi_device_scan_children),
221 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe),
226 static driver_t acpi_driver = {
229 sizeof(struct acpi_softc),
232 static devclass_t acpi_devclass;
233 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0);
234 MODULE_VERSION(acpi, 1);
236 ACPI_SERIAL_DECL(acpi, "ACPI root bus");
238 /* Local pools for managing system resources for ACPI child devices. */
239 static struct rman acpi_rman_io, acpi_rman_mem;
241 #define ACPI_MINIMUM_AWAKETIME 5
243 /* Holds the description of the acpi0 device. */
244 static char acpi_desc[ACPI_OEM_ID_SIZE + ACPI_OEM_TABLE_ID_SIZE + 2];
246 SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging");
247 static char acpi_ca_version[12];
248 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD,
249 acpi_ca_version, 0, "Version of Intel ACPI-CA");
252 * Allow overriding _OSI methods.
254 static char acpi_install_interface[256];
255 TUNABLE_STR("hw.acpi.install_interface", acpi_install_interface,
256 sizeof(acpi_install_interface));
257 static char acpi_remove_interface[256];
258 TUNABLE_STR("hw.acpi.remove_interface", acpi_remove_interface,
259 sizeof(acpi_remove_interface));
261 /* Allow users to dump Debug objects without ACPI debugger. */
262 static int acpi_debug_objects;
263 TUNABLE_INT("debug.acpi.enable_debug_objects", &acpi_debug_objects);
264 SYSCTL_PROC(_debug_acpi, OID_AUTO, enable_debug_objects,
265 CTLFLAG_RW | CTLTYPE_INT, NULL, 0, acpi_debug_objects_sysctl, "I",
266 "Enable Debug objects");
268 /* Allow the interpreter to ignore common mistakes in BIOS. */
269 static int acpi_interpreter_slack = 1;
270 TUNABLE_INT("debug.acpi.interpreter_slack", &acpi_interpreter_slack);
271 SYSCTL_INT(_debug_acpi, OID_AUTO, interpreter_slack, CTLFLAG_RDTUN,
272 &acpi_interpreter_slack, 1, "Turn on interpreter slack mode.");
274 /* Ignore register widths set by FADT and use default widths instead. */
275 static int acpi_ignore_reg_width = 1;
276 TUNABLE_INT("debug.acpi.default_register_width", &acpi_ignore_reg_width);
277 SYSCTL_INT(_debug_acpi, OID_AUTO, default_register_width, CTLFLAG_RDTUN,
278 &acpi_ignore_reg_width, 1, "Ignore register widths set by FADT");
281 /* Reset system clock while resuming. XXX Remove once tested. */
282 static int acpi_reset_clock = 1;
283 TUNABLE_INT("debug.acpi.reset_clock", &acpi_reset_clock);
284 SYSCTL_INT(_debug_acpi, OID_AUTO, reset_clock, CTLFLAG_RW,
285 &acpi_reset_clock, 1, "Reset system clock while resuming.");
288 /* Allow users to override quirks. */
289 TUNABLE_INT("debug.acpi.quirks", &acpi_quirks);
291 static int acpi_susp_bounce;
292 SYSCTL_INT(_debug_acpi, OID_AUTO, suspend_bounce, CTLFLAG_RW,
293 &acpi_susp_bounce, 0, "Don't actually suspend, just test devices.");
296 * ACPI can only be loaded as a module by the loader; activating it after
297 * system bootstrap time is not useful, and can be fatal to the system.
298 * It also cannot be unloaded, since the entire system bus hierarchy hangs
302 acpi_modevent(struct module *mod, int event, void *junk)
307 printf("The ACPI driver cannot be loaded after boot.\n");
312 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI)
322 * Perform early initialization.
327 static int started = 0;
331 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
333 /* Only run the startup code once. The MADT driver also calls this. */
335 return_VALUE (AE_OK);
339 * Pre-allocate space for RSDT/XSDT and DSDT tables and allow resizing
340 * if more tables exist.
342 if (ACPI_FAILURE(status = AcpiInitializeTables(NULL, 2, TRUE))) {
343 printf("ACPI: Table initialisation failed: %s\n",
344 AcpiFormatException(status));
345 return_VALUE (status);
348 /* Set up any quirks we have for this system. */
349 if (acpi_quirks == ACPI_Q_OK)
350 acpi_table_quirks(&acpi_quirks);
352 /* If the user manually set the disabled hint to 0, force-enable ACPI. */
353 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0)
354 acpi_quirks &= ~ACPI_Q_BROKEN;
355 if (acpi_quirks & ACPI_Q_BROKEN) {
356 printf("ACPI disabled by blacklist. Contact your BIOS vendor.\n");
360 return_VALUE (status);
364 * Detect ACPI and perform early initialisation.
369 ACPI_TABLE_RSDP *rsdp;
370 ACPI_TABLE_HEADER *rsdt;
371 ACPI_PHYSICAL_ADDRESS paddr;
374 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
379 /* Check that we haven't been disabled with a hint. */
380 if (resource_disabled("acpi", 0))
383 /* Check for other PM systems. */
384 if (power_pm_get_type() != POWER_PM_TYPE_NONE &&
385 power_pm_get_type() != POWER_PM_TYPE_ACPI) {
386 printf("ACPI identify failed, other PM system enabled.\n");
390 /* Initialize root tables. */
391 if (ACPI_FAILURE(acpi_Startup())) {
392 printf("ACPI: Try disabling either ACPI or apic support.\n");
396 if ((paddr = AcpiOsGetRootPointer()) == 0 ||
397 (rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP))) == NULL)
399 if (rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress != 0)
400 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress;
402 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress;
403 AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP));
405 if ((rsdt = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER))) == NULL)
407 sbuf_new(&sb, acpi_desc, sizeof(acpi_desc), SBUF_FIXEDLEN);
408 sbuf_bcat(&sb, rsdt->OemId, ACPI_OEM_ID_SIZE);
411 sbuf_bcat(&sb, rsdt->OemTableId, ACPI_OEM_TABLE_ID_SIZE);
415 AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER));
417 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%x", ACPI_CA_VERSION);
423 * Fetch some descriptive data from ACPI to put in our attach message.
426 acpi_probe(device_t dev)
429 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
431 device_set_desc(dev, acpi_desc);
433 return_VALUE (BUS_PROBE_NOWILDCARD);
437 acpi_attach(device_t dev)
439 struct acpi_softc *sc;
446 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
448 sc = device_get_softc(dev);
450 callout_init(&sc->susp_force_to, 1);
454 /* Initialize resource manager. */
455 acpi_rman_io.rm_type = RMAN_ARRAY;
456 acpi_rman_io.rm_start = 0;
457 acpi_rman_io.rm_end = 0xffff;
458 acpi_rman_io.rm_descr = "ACPI I/O ports";
459 if (rman_init(&acpi_rman_io) != 0)
460 panic("acpi rman_init IO ports failed");
461 acpi_rman_mem.rm_type = RMAN_ARRAY;
462 acpi_rman_mem.rm_start = 0;
463 acpi_rman_mem.rm_end = ~0ul;
464 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses";
465 if (rman_init(&acpi_rman_mem) != 0)
466 panic("acpi rman_init memory failed");
468 /* Initialise the ACPI mutex */
469 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF);
472 * Set the globals from our tunables. This is needed because ACPI-CA
473 * uses UINT8 for some values and we have no tunable_byte.
475 AcpiGbl_EnableInterpreterSlack = acpi_interpreter_slack ? TRUE : FALSE;
476 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE;
477 AcpiGbl_UseDefaultRegisterWidths = acpi_ignore_reg_width ? TRUE : FALSE;
481 * Disable all debugging layers and levels.
487 /* Start up the ACPI CA subsystem. */
488 status = AcpiInitializeSubsystem();
489 if (ACPI_FAILURE(status)) {
490 device_printf(dev, "Could not initialize Subsystem: %s\n",
491 AcpiFormatException(status));
495 /* Override OS interfaces if the user requested. */
496 acpi_reset_interfaces(dev);
498 /* Load ACPI name space. */
499 status = AcpiLoadTables();
500 if (ACPI_FAILURE(status)) {
501 device_printf(dev, "Could not load Namespace: %s\n",
502 AcpiFormatException(status));
506 #if defined(__i386__) || defined(__amd64__)
507 /* Handle MCFG table if present. */
512 * Note that some systems (specifically, those with namespace evaluation
513 * issues that require the avoidance of parts of the namespace) must
514 * avoid running _INI and _STA on everything, as well as dodging the final
517 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT).
519 * XXX We should arrange for the object init pass after we have attached
520 * all our child devices, but on many systems it works here.
523 if (testenv("debug.acpi.avoid"))
524 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT;
526 /* Bring the hardware and basic handlers online. */
527 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) {
528 device_printf(dev, "Could not enable ACPI: %s\n",
529 AcpiFormatException(status));
534 * Call the ECDT probe function to provide EC functionality before
535 * the namespace has been evaluated.
537 * XXX This happens before the sysresource devices have been probed and
538 * attached so its resources come from nexus0. In practice, this isn't
539 * a problem but should be addressed eventually.
541 acpi_ec_ecdt_probe(dev);
543 /* Bring device objects and regions online. */
544 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) {
545 device_printf(dev, "Could not initialize ACPI objects: %s\n",
546 AcpiFormatException(status));
551 * Setup our sysctl tree.
553 * XXX: This doesn't check to make sure that none of these fail.
555 sysctl_ctx_init(&sc->acpi_sysctl_ctx);
556 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx,
557 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO,
558 device_get_name(dev), CTLFLAG_RD, 0, "");
559 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
560 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD,
561 0, 0, acpi_supported_sleep_state_sysctl, "A", "");
562 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
563 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW,
564 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", "");
565 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
566 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW,
567 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", "");
568 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
569 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW,
570 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", "");
571 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
572 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW,
573 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", "");
574 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
575 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW,
576 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", "");
577 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
578 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0,
579 "sleep delay in seconds");
580 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
581 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode");
582 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
583 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode");
584 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
585 OID_AUTO, "disable_on_reboot", CTLFLAG_RW,
586 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system");
587 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
588 OID_AUTO, "handle_reboot", CTLFLAG_RW,
589 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot");
592 * Default to 1 second before sleeping to give some machines time to
595 sc->acpi_sleep_delay = 1;
597 sc->acpi_verbose = 1;
598 if ((env = kern_getenv("hw.acpi.verbose")) != NULL) {
599 if (strcmp(env, "0") != 0)
600 sc->acpi_verbose = 1;
604 /* Only enable reboot by default if the FADT says it is available. */
605 if (AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER)
606 sc->acpi_handle_reboot = 1;
608 #if !ACPI_REDUCED_HARDWARE
609 /* Only enable S4BIOS by default if the FACS says it is available. */
610 if (AcpiGbl_FACS != NULL && AcpiGbl_FACS->Flags & ACPI_FACS_S4_BIOS_PRESENT)
614 /* Probe all supported sleep states. */
615 acpi_sleep_states[ACPI_STATE_S0] = TRUE;
616 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++)
617 if (ACPI_SUCCESS(AcpiEvaluateObject(ACPI_ROOT_OBJECT,
618 __DECONST(char *, AcpiGbl_SleepStateNames[state]), NULL, NULL)) &&
619 ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB)))
620 acpi_sleep_states[state] = TRUE;
623 * Dispatch the default sleep state to devices. The lid switch is set
624 * to UNKNOWN by default to avoid surprising users.
626 sc->acpi_power_button_sx = acpi_sleep_states[ACPI_STATE_S5] ?
627 ACPI_STATE_S5 : ACPI_STATE_UNKNOWN;
628 sc->acpi_lid_switch_sx = ACPI_STATE_UNKNOWN;
629 sc->acpi_standby_sx = acpi_sleep_states[ACPI_STATE_S1] ?
630 ACPI_STATE_S1 : ACPI_STATE_UNKNOWN;
631 sc->acpi_suspend_sx = acpi_sleep_states[ACPI_STATE_S3] ?
632 ACPI_STATE_S3 : ACPI_STATE_UNKNOWN;
634 /* Pick the first valid sleep state for the sleep button default. */
635 sc->acpi_sleep_button_sx = ACPI_STATE_UNKNOWN;
636 for (state = ACPI_STATE_S1; state <= ACPI_STATE_S4; state++)
637 if (acpi_sleep_states[state]) {
638 sc->acpi_sleep_button_sx = state;
642 acpi_enable_fixed_events(sc);
645 * Scan the namespace and attach/initialise children.
648 /* Register our shutdown handler. */
649 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc,
653 * Register our acpi event handlers.
654 * XXX should be configurable eg. via userland policy manager.
656 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep,
657 sc, ACPI_EVENT_PRI_LAST);
658 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup,
659 sc, ACPI_EVENT_PRI_LAST);
661 /* Flag our initial states. */
662 sc->acpi_enabled = TRUE;
663 sc->acpi_sstate = ACPI_STATE_S0;
664 sc->acpi_sleep_disabled = TRUE;
666 /* Create the control device */
667 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644,
669 sc->acpi_dev_t->si_drv1 = sc;
671 if ((error = acpi_machdep_init(dev)))
674 /* Register ACPI again to pass the correct argument of pm_func. */
675 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc);
677 if (!acpi_disabled("bus")) {
678 EVENTHANDLER_REGISTER(dev_lookup, acpi_lookup, NULL, 1000);
679 acpi_probe_children(dev);
682 /* Update all GPEs and enable runtime GPEs. */
683 status = AcpiUpdateAllGpes();
684 if (ACPI_FAILURE(status))
685 device_printf(dev, "Could not update all GPEs: %s\n",
686 AcpiFormatException(status));
688 /* Allow sleep request after a while. */
689 callout_init_mtx(&acpi_sleep_timer, &acpi_mutex, 0);
690 callout_reset(&acpi_sleep_timer, hz * ACPI_MINIMUM_AWAKETIME,
691 acpi_sleep_enable, sc);
696 return_VALUE (error);
700 acpi_set_power_children(device_t dev, int state)
704 int dstate, i, numdevs;
706 if (device_get_children(dev, &devlist, &numdevs) != 0)
710 * Retrieve and set D-state for the sleep state if _SxD is present.
711 * Skip children who aren't attached since they are handled separately.
713 for (i = 0; i < numdevs; i++) {
716 if (device_is_attached(child) &&
717 acpi_device_pwr_for_sleep(dev, child, &dstate) == 0)
718 acpi_set_powerstate(child, dstate);
720 free(devlist, M_TEMP);
724 acpi_suspend(device_t dev)
730 error = bus_generic_suspend(dev);
732 acpi_set_power_children(dev, ACPI_STATE_D3);
738 acpi_resume(device_t dev)
743 acpi_set_power_children(dev, ACPI_STATE_D0);
745 return (bus_generic_resume(dev));
749 acpi_shutdown(device_t dev)
754 /* Allow children to shutdown first. */
755 bus_generic_shutdown(dev);
758 * Enable any GPEs that are able to power-on the system (i.e., RTC).
759 * Also, disable any that are not valid for this state (most).
761 acpi_wake_prep_walk(ACPI_STATE_S5);
767 * Handle a new device being added
770 acpi_add_child(device_t bus, u_int order, const char *name, int unit)
772 struct acpi_device *ad;
775 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL)
778 resource_list_init(&ad->ad_rl);
780 child = device_add_child_ordered(bus, order, name, unit);
782 device_set_ivars(child, ad);
789 acpi_print_child(device_t bus, device_t child)
791 struct acpi_device *adev = device_get_ivars(child);
792 struct resource_list *rl = &adev->ad_rl;
795 retval += bus_print_child_header(bus, child);
796 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx");
797 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx");
798 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
799 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld");
800 if (device_get_flags(child))
801 retval += printf(" flags %#x", device_get_flags(child));
802 retval += bus_print_child_domain(bus, child);
803 retval += bus_print_child_footer(bus, child);
809 * If this device is an ACPI child but no one claimed it, attempt
810 * to power it off. We'll power it back up when a driver is added.
812 * XXX Disabled for now since many necessary devices (like fdc and
813 * ATA) don't claim the devices we created for them but still expect
814 * them to be powered up.
817 acpi_probe_nomatch(device_t bus, device_t child)
819 #ifdef ACPI_ENABLE_POWERDOWN_NODRIVER
820 acpi_set_powerstate(child, ACPI_STATE_D3);
825 * If a new driver has a chance to probe a child, first power it up.
827 * XXX Disabled for now (see acpi_probe_nomatch for details).
830 acpi_driver_added(device_t dev, driver_t *driver)
832 device_t child, *devlist;
835 DEVICE_IDENTIFY(driver, dev);
836 if (device_get_children(dev, &devlist, &numdevs))
838 for (i = 0; i < numdevs; i++) {
840 if (device_get_state(child) == DS_NOTPRESENT) {
841 #ifdef ACPI_ENABLE_POWERDOWN_NODRIVER
842 acpi_set_powerstate(child, ACPI_STATE_D0);
843 if (device_probe_and_attach(child) != 0)
844 acpi_set_powerstate(child, ACPI_STATE_D3);
846 device_probe_and_attach(child);
850 free(devlist, M_TEMP);
853 /* Location hint for devctl(8) */
855 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf,
858 struct acpi_device *dinfo = device_get_ivars(child);
862 if (dinfo->ad_handle) {
863 snprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle));
864 if (ACPI_SUCCESS(acpi_GetInteger(dinfo->ad_handle, "_PXM", &pxm))) {
865 snprintf(buf2, 32, " _PXM=%d", pxm);
866 strlcat(buf, buf2, buflen);
869 snprintf(buf, buflen, "unknown");
874 /* PnP information for devctl(8) */
876 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf,
879 struct acpi_device *dinfo = device_get_ivars(child);
880 ACPI_DEVICE_INFO *adinfo;
882 if (ACPI_FAILURE(AcpiGetObjectInfo(dinfo->ad_handle, &adinfo))) {
883 snprintf(buf, buflen, "unknown");
887 snprintf(buf, buflen, "_HID=%s _UID=%lu",
888 (adinfo->Valid & ACPI_VALID_HID) ?
889 adinfo->HardwareId.String : "none",
890 (adinfo->Valid & ACPI_VALID_UID) ?
891 strtoul(adinfo->UniqueId.String, NULL, 10) : 0UL);
898 * Handle per-device ivars
901 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
903 struct acpi_device *ad;
905 if ((ad = device_get_ivars(child)) == NULL) {
906 device_printf(child, "device has no ivars\n");
910 /* ACPI and ISA compatibility ivars */
912 case ACPI_IVAR_HANDLE:
913 *(ACPI_HANDLE *)result = ad->ad_handle;
915 case ACPI_IVAR_PRIVATE:
916 *(void **)result = ad->ad_private;
918 case ACPI_IVAR_FLAGS:
919 *(int *)result = ad->ad_flags;
921 case ISA_IVAR_VENDORID:
922 case ISA_IVAR_SERIAL:
923 case ISA_IVAR_COMPATID:
926 case ISA_IVAR_LOGICALID:
927 *(int *)result = acpi_isa_get_logicalid(child);
937 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value)
939 struct acpi_device *ad;
941 if ((ad = device_get_ivars(child)) == NULL) {
942 device_printf(child, "device has no ivars\n");
947 case ACPI_IVAR_HANDLE:
948 ad->ad_handle = (ACPI_HANDLE)value;
950 case ACPI_IVAR_PRIVATE:
951 ad->ad_private = (void *)value;
953 case ACPI_IVAR_FLAGS:
954 ad->ad_flags = (int)value;
957 panic("bad ivar write request (%d)", index);
965 * Handle child resource allocation/removal
967 static struct resource_list *
968 acpi_get_rlist(device_t dev, device_t child)
970 struct acpi_device *ad;
972 ad = device_get_ivars(child);
977 acpi_match_resource_hint(device_t dev, int type, long value)
979 struct acpi_device *ad = device_get_ivars(dev);
980 struct resource_list *rl = &ad->ad_rl;
981 struct resource_list_entry *rle;
983 STAILQ_FOREACH(rle, rl, link) {
984 if (rle->type != type)
986 if (rle->start <= value && rle->end >= value)
993 * Wire device unit numbers based on resource matches in hints.
996 acpi_hint_device_unit(device_t acdev, device_t child, const char *name,
1001 int line, matches, unit;
1004 * Iterate over all the hints for the devices with the specified
1005 * name to see if one's resources are a subset of this device.
1009 if (resource_find_dev(&line, name, &unit, "at", NULL) != 0)
1012 /* Must have an "at" for acpi or isa. */
1013 resource_string_value(name, unit, "at", &s);
1014 if (!(strcmp(s, "acpi0") == 0 || strcmp(s, "acpi") == 0 ||
1015 strcmp(s, "isa0") == 0 || strcmp(s, "isa") == 0))
1019 * Check for matching resources. We must have at least one match.
1020 * Since I/O and memory resources cannot be shared, if we get a
1021 * match on either of those, ignore any mismatches in IRQs or DRQs.
1023 * XXX: We may want to revisit this to be more lenient and wire
1024 * as long as it gets one match.
1027 if (resource_long_value(name, unit, "port", &value) == 0) {
1029 * Floppy drive controllers are notorious for having a
1030 * wide variety of resources not all of which include the
1031 * first port that is specified by the hint (typically
1032 * 0x3f0) (see the comment above fdc_isa_alloc_resources()
1033 * in fdc_isa.c). However, they do all seem to include
1034 * port + 2 (e.g. 0x3f2) so for a floppy device, look for
1035 * 'value + 2' in the port resources instead of the hint
1038 if (strcmp(name, "fdc") == 0)
1040 if (acpi_match_resource_hint(child, SYS_RES_IOPORT, value))
1045 if (resource_long_value(name, unit, "maddr", &value) == 0) {
1046 if (acpi_match_resource_hint(child, SYS_RES_MEMORY, value))
1053 if (resource_long_value(name, unit, "irq", &value) == 0) {
1054 if (acpi_match_resource_hint(child, SYS_RES_IRQ, value))
1059 if (resource_long_value(name, unit, "drq", &value) == 0) {
1060 if (acpi_match_resource_hint(child, SYS_RES_DRQ, value))
1068 /* We have a winner! */
1076 * Fetch the VM domain for the given device 'dev'.
1078 * Return 1 + domain if there's a domain, 0 if not found;
1082 acpi_parse_pxm(device_t dev, int *domain)
1088 h = acpi_get_handle(dev);
1090 ACPI_SUCCESS(acpi_GetInteger(h, "_PXM", &pxm))) {
1091 d = acpi_map_pxm_to_vm_domainid(pxm);
1103 * Fetch the NUMA domain for the given device.
1105 * If a device has a _PXM method, map that to a NUMA domain.
1107 * If none is found, then it'll call the parent method.
1108 * If there's no domain, return ENOENT.
1111 acpi_get_domain(device_t dev, device_t child, int *domain)
1115 ret = acpi_parse_pxm(child, domain);
1123 /* No _PXM node; go up a level */
1124 return (bus_generic_get_domain(dev, child, domain));
1128 * Pre-allocate/manage all memory and IO resources. Since rman can't handle
1129 * duplicates, we merge any in the sysresource attach routine.
1132 acpi_sysres_alloc(device_t dev)
1134 struct resource *res;
1135 struct resource_list *rl;
1136 struct resource_list_entry *rle;
1138 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL };
1143 * Probe/attach any sysresource devices. This would be unnecessary if we
1144 * had multi-pass probe/attach.
1146 if (device_get_children(dev, &children, &child_count) != 0)
1148 for (i = 0; i < child_count; i++) {
1149 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL)
1150 device_probe_and_attach(children[i]);
1152 free(children, M_TEMP);
1154 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev);
1155 STAILQ_FOREACH(rle, rl, link) {
1156 if (rle->res != NULL) {
1157 device_printf(dev, "duplicate resource for %lx\n", rle->start);
1161 /* Only memory and IO resources are valid here. */
1162 switch (rle->type) {
1163 case SYS_RES_IOPORT:
1166 case SYS_RES_MEMORY:
1167 rm = &acpi_rman_mem;
1173 /* Pre-allocate resource and add to our rman pool. */
1174 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type,
1175 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 0);
1177 rman_manage_region(rm, rman_get_start(res), rman_get_end(res));
1179 } else if (bootverbose)
1180 device_printf(dev, "reservation of %lx, %lx (%d) failed\n",
1181 rle->start, rle->count, rle->type);
1186 static char *pcilink_ids[] = { "PNP0C0F", NULL };
1187 static char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL };
1190 * Reserve declared resources for devices found during attach once system
1191 * resources have been allocated.
1194 acpi_reserve_resources(device_t dev)
1196 struct resource_list_entry *rle;
1197 struct resource_list *rl;
1198 struct acpi_device *ad;
1199 struct acpi_softc *sc;
1203 sc = device_get_softc(dev);
1204 if (device_get_children(dev, &children, &child_count) != 0)
1206 for (i = 0; i < child_count; i++) {
1207 ad = device_get_ivars(children[i]);
1210 /* Don't reserve system resources. */
1211 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL)
1214 STAILQ_FOREACH(rle, rl, link) {
1216 * Don't reserve IRQ resources. There are many sticky things
1217 * to get right otherwise (e.g. IRQs for psm, atkbd, and HPET
1218 * when using legacy routing).
1220 if (rle->type == SYS_RES_IRQ)
1224 * Don't reserve the resource if it is already allocated.
1225 * The acpi_ec(4) driver can allocate its resources early
1226 * if ECDT is present.
1228 if (rle->res != NULL)
1232 * Try to reserve the resource from our parent. If this
1233 * fails because the resource is a system resource, just
1234 * let it be. The resource range is already reserved so
1235 * that other devices will not use it. If the driver
1236 * needs to allocate the resource, then
1237 * acpi_alloc_resource() will sub-alloc from the system
1240 resource_list_reserve(rl, dev, children[i], rle->type, &rle->rid,
1241 rle->start, rle->end, rle->count, 0);
1244 free(children, M_TEMP);
1245 sc->acpi_resources_reserved = 1;
1249 acpi_set_resource(device_t dev, device_t child, int type, int rid,
1250 u_long start, u_long count)
1252 struct acpi_softc *sc = device_get_softc(dev);
1253 struct acpi_device *ad = device_get_ivars(child);
1254 struct resource_list *rl = &ad->ad_rl;
1255 ACPI_DEVICE_INFO *devinfo;
1258 /* Ignore IRQ resources for PCI link devices. */
1259 if (type == SYS_RES_IRQ && ACPI_ID_PROBE(dev, child, pcilink_ids) != NULL)
1263 * Ignore most resources for PCI root bridges. Some BIOSes
1264 * incorrectly enumerate the memory ranges they decode as plain
1265 * memory resources instead of as ResourceProducer ranges. Other
1266 * BIOSes incorrectly list system resource entries for I/O ranges
1267 * under the PCI bridge. Do allow the one known-correct case on
1268 * x86 of a PCI bridge claiming the I/O ports used for PCI config
1271 if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) {
1272 if (ACPI_SUCCESS(AcpiGetObjectInfo(ad->ad_handle, &devinfo))) {
1273 if ((devinfo->Flags & ACPI_PCI_ROOT_BRIDGE) != 0) {
1274 #if defined(__i386__) || defined(__amd64__)
1275 if (!(type == SYS_RES_IOPORT && start == CONF1_ADDR_PORT))
1278 AcpiOsFree(devinfo);
1282 AcpiOsFree(devinfo);
1286 /* If the resource is already allocated, fail. */
1287 if (resource_list_busy(rl, type, rid))
1290 /* If the resource is already reserved, release it. */
1291 if (resource_list_reserved(rl, type, rid))
1292 resource_list_unreserve(rl, dev, child, type, rid);
1294 /* Add the resource. */
1295 end = (start + count - 1);
1296 resource_list_add(rl, type, rid, start, end, count);
1298 /* Don't reserve resources until the system resources are allocated. */
1299 if (!sc->acpi_resources_reserved)
1302 /* Don't reserve system resources. */
1303 if (ACPI_ID_PROBE(dev, child, sysres_ids) != NULL)
1307 * Don't reserve IRQ resources. There are many sticky things to
1308 * get right otherwise (e.g. IRQs for psm, atkbd, and HPET when
1309 * using legacy routing).
1311 if (type == SYS_RES_IRQ)
1315 * Reserve the resource.
1317 * XXX: Ignores failure for now. Failure here is probably a
1318 * BIOS/firmware bug?
1320 resource_list_reserve(rl, dev, child, type, &rid, start, end, count, 0);
1324 static struct resource *
1325 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid,
1326 u_long start, u_long end, u_long count, u_int flags)
1329 struct acpi_device *ad;
1330 struct resource_list_entry *rle;
1331 struct resource_list *rl;
1332 struct resource *res;
1333 int isdefault = (start == 0UL && end == ~0UL);
1336 * First attempt at allocating the resource. For direct children,
1337 * use resource_list_alloc() to handle reserved resources. For
1338 * other devices, pass the request up to our parent.
1340 if (bus == device_get_parent(child)) {
1341 ad = device_get_ivars(child);
1345 * Simulate the behavior of the ISA bus for direct children
1346 * devices. That is, if a non-default range is specified for
1347 * a resource that doesn't exist, use bus_set_resource() to
1348 * add the resource before allocating it. Note that these
1349 * resources will not be reserved.
1351 if (!isdefault && resource_list_find(rl, type, *rid) == NULL)
1352 resource_list_add(rl, type, *rid, start, end, count);
1353 res = resource_list_alloc(rl, bus, child, type, rid, start, end, count,
1355 if (res != NULL && type == SYS_RES_IRQ) {
1357 * Since bus_config_intr() takes immediate effect, we cannot
1358 * configure the interrupt associated with a device when we
1359 * parse the resources but have to defer it until a driver
1360 * actually allocates the interrupt via bus_alloc_resource().
1362 * XXX: Should we handle the lookup failing?
1364 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares)))
1365 acpi_config_intr(child, &ares);
1369 * If this is an allocation of the "default" range for a given
1370 * RID, fetch the exact bounds for this resource from the
1371 * resource list entry to try to allocate the range from the
1372 * system resource regions.
1374 if (res == NULL && isdefault) {
1375 rle = resource_list_find(rl, type, *rid);
1383 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid,
1384 start, end, count, flags);
1387 * If the first attempt failed and this is an allocation of a
1388 * specific range, try to satisfy the request via a suballocation
1389 * from our system resource regions.
1391 if (res == NULL && start + count - 1 == end)
1392 res = acpi_alloc_sysres(child, type, rid, start, end, count, flags);
1397 * Attempt to allocate a specific resource range from the system
1398 * resource ranges. Note that we only handle memory and I/O port
1402 acpi_alloc_sysres(device_t child, int type, int *rid, u_long start, u_long end,
1403 u_long count, u_int flags)
1406 struct resource *res;
1409 case SYS_RES_IOPORT:
1412 case SYS_RES_MEMORY:
1413 rm = &acpi_rman_mem;
1419 KASSERT(start + count - 1 == end, ("wildcard resource range"));
1420 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE,
1425 rman_set_rid(res, *rid);
1427 /* If requested, activate the resource using the parent's method. */
1428 if (flags & RF_ACTIVE)
1429 if (bus_activate_resource(child, type, *rid, res) != 0) {
1430 rman_release_resource(res);
1438 acpi_is_resource_managed(int type, struct resource *r)
1441 /* We only handle memory and IO resources through rman. */
1443 case SYS_RES_IOPORT:
1444 return (rman_is_region_manager(r, &acpi_rman_io));
1445 case SYS_RES_MEMORY:
1446 return (rman_is_region_manager(r, &acpi_rman_mem));
1452 acpi_adjust_resource(device_t bus, device_t child, int type, struct resource *r,
1453 u_long start, u_long end)
1456 if (acpi_is_resource_managed(type, r))
1457 return (rman_adjust_resource(r, start, end));
1458 return (bus_generic_adjust_resource(bus, child, type, r, start, end));
1462 acpi_release_resource(device_t bus, device_t child, int type, int rid,
1468 * If this resource belongs to one of our internal managers,
1469 * deactivate it and release it to the local pool.
1471 if (acpi_is_resource_managed(type, r)) {
1472 if (rman_get_flags(r) & RF_ACTIVE) {
1473 ret = bus_deactivate_resource(child, type, rid, r);
1477 return (rman_release_resource(r));
1480 return (bus_generic_rl_release_resource(bus, child, type, rid, r));
1484 acpi_delete_resource(device_t bus, device_t child, int type, int rid)
1486 struct resource_list *rl;
1488 rl = acpi_get_rlist(bus, child);
1489 if (resource_list_busy(rl, type, rid)) {
1490 device_printf(bus, "delete_resource: Resource still owned by child"
1491 " (type=%d, rid=%d)\n", type, rid);
1494 resource_list_unreserve(rl, bus, child, type, rid);
1495 resource_list_delete(rl, type, rid);
1498 /* Allocate an IO port or memory resource, given its GAS. */
1500 acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas,
1501 struct resource **res, u_int flags)
1503 int error, res_type;
1506 if (type == NULL || rid == NULL || gas == NULL || res == NULL)
1509 /* We only support memory and IO spaces. */
1510 switch (gas->SpaceId) {
1511 case ACPI_ADR_SPACE_SYSTEM_MEMORY:
1512 res_type = SYS_RES_MEMORY;
1514 case ACPI_ADR_SPACE_SYSTEM_IO:
1515 res_type = SYS_RES_IOPORT;
1518 return (EOPNOTSUPP);
1522 * If the register width is less than 8, assume the BIOS author means
1523 * it is a bit field and just allocate a byte.
1525 if (gas->BitWidth && gas->BitWidth < 8)
1528 /* Validate the address after we're sure we support the space. */
1529 if (gas->Address == 0 || gas->BitWidth == 0)
1532 bus_set_resource(dev, res_type, *rid, gas->Address,
1534 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags);
1539 bus_delete_resource(dev, res_type, *rid);
1544 /* Probe _HID and _CID for compatible ISA PNP ids. */
1546 acpi_isa_get_logicalid(device_t dev)
1548 ACPI_DEVICE_INFO *devinfo;
1552 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1554 /* Fetch and validate the HID. */
1555 if ((h = acpi_get_handle(dev)) == NULL ||
1556 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
1559 pnpid = (devinfo->Valid & ACPI_VALID_HID) != 0 &&
1560 devinfo->HardwareId.Length >= ACPI_EISAID_STRING_SIZE ?
1561 PNP_EISAID(devinfo->HardwareId.String) : 0;
1562 AcpiOsFree(devinfo);
1564 return_VALUE (pnpid);
1568 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count)
1570 ACPI_DEVICE_INFO *devinfo;
1571 ACPI_PNP_DEVICE_ID *ids;
1576 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1580 /* Fetch and validate the CID */
1581 if ((h = acpi_get_handle(dev)) == NULL ||
1582 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
1585 if ((devinfo->Valid & ACPI_VALID_CID) == 0) {
1586 AcpiOsFree(devinfo);
1590 if (devinfo->CompatibleIdList.Count < count)
1591 count = devinfo->CompatibleIdList.Count;
1592 ids = devinfo->CompatibleIdList.Ids;
1593 for (i = 0, valid = 0; i < count; i++)
1594 if (ids[i].Length >= ACPI_EISAID_STRING_SIZE &&
1595 strncmp(ids[i].String, "PNP", 3) == 0) {
1596 *pnpid++ = PNP_EISAID(ids[i].String);
1599 AcpiOsFree(devinfo);
1601 return_VALUE (valid);
1605 acpi_device_id_probe(device_t bus, device_t dev, char **ids)
1611 h = acpi_get_handle(dev);
1612 if (ids == NULL || h == NULL)
1614 t = acpi_get_type(dev);
1615 if (t != ACPI_TYPE_DEVICE && t != ACPI_TYPE_PROCESSOR)
1618 /* Try to match one of the array of IDs with a HID or CID. */
1619 for (i = 0; ids[i] != NULL; i++) {
1620 if (acpi_MatchHid(h, ids[i]))
1627 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname,
1628 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret)
1633 h = ACPI_ROOT_OBJECT;
1634 else if ((h = acpi_get_handle(dev)) == NULL)
1635 return (AE_BAD_PARAMETER);
1636 return (AcpiEvaluateObject(h, pathname, parameters, ret));
1640 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate)
1642 struct acpi_softc *sc;
1647 handle = acpi_get_handle(dev);
1650 * XXX If we find these devices, don't try to power them down.
1651 * The serial and IRDA ports on my T23 hang the system when
1652 * set to D3 and it appears that such legacy devices may
1653 * need special handling in their drivers.
1655 if (dstate == NULL || handle == NULL ||
1656 acpi_MatchHid(handle, "PNP0500") ||
1657 acpi_MatchHid(handle, "PNP0501") ||
1658 acpi_MatchHid(handle, "PNP0502") ||
1659 acpi_MatchHid(handle, "PNP0510") ||
1660 acpi_MatchHid(handle, "PNP0511"))
1664 * Override next state with the value from _SxD, if present.
1665 * Note illegal _S0D is evaluated because some systems expect this.
1667 sc = device_get_softc(bus);
1668 snprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate);
1669 status = acpi_GetInteger(handle, sxd, dstate);
1670 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
1671 device_printf(dev, "failed to get %s on %s: %s\n", sxd,
1672 acpi_name(handle), AcpiFormatException(status));
1679 /* Callback arg for our implementation of walking the namespace. */
1680 struct acpi_device_scan_ctx {
1681 acpi_scan_cb_t user_fn;
1687 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval)
1689 struct acpi_device_scan_ctx *ctx;
1690 device_t dev, old_dev;
1692 ACPI_OBJECT_TYPE type;
1695 * Skip this device if we think we'll have trouble with it or it is
1696 * the parent where the scan began.
1698 ctx = (struct acpi_device_scan_ctx *)arg;
1699 if (acpi_avoid(h) || h == ctx->parent)
1702 /* If this is not a valid device type (e.g., a method), skip it. */
1703 if (ACPI_FAILURE(AcpiGetType(h, &type)))
1705 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR &&
1706 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER)
1710 * Call the user function with the current device. If it is unchanged
1711 * afterwards, return. Otherwise, we update the handle to the new dev.
1713 old_dev = acpi_get_device(h);
1715 status = ctx->user_fn(h, &dev, level, ctx->arg);
1716 if (ACPI_FAILURE(status) || old_dev == dev)
1719 /* Remove the old child and its connection to the handle. */
1720 if (old_dev != NULL) {
1721 device_delete_child(device_get_parent(old_dev), old_dev);
1722 AcpiDetachData(h, acpi_fake_objhandler);
1725 /* Recreate the handle association if the user created a device. */
1727 AcpiAttachData(h, acpi_fake_objhandler, dev);
1733 acpi_device_scan_children(device_t bus, device_t dev, int max_depth,
1734 acpi_scan_cb_t user_fn, void *arg)
1737 struct acpi_device_scan_ctx ctx;
1739 if (acpi_disabled("children"))
1743 h = ACPI_ROOT_OBJECT;
1744 else if ((h = acpi_get_handle(dev)) == NULL)
1745 return (AE_BAD_PARAMETER);
1746 ctx.user_fn = user_fn;
1749 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth,
1750 acpi_device_scan_cb, NULL, &ctx, NULL));
1754 * Even though ACPI devices are not PCI, we use the PCI approach for setting
1755 * device power states since it's close enough to ACPI.
1758 acpi_set_powerstate(device_t child, int state)
1763 h = acpi_get_handle(child);
1764 if (state < ACPI_STATE_D0 || state > ACPI_D_STATES_MAX)
1769 /* Ignore errors if the power methods aren't present. */
1770 status = acpi_pwr_switch_consumer(h, state);
1771 if (ACPI_SUCCESS(status)) {
1773 device_printf(child, "set ACPI power state D%d on %s\n",
1774 state, acpi_name(h));
1775 } else if (status != AE_NOT_FOUND)
1776 device_printf(child,
1777 "failed to set ACPI power state D%d on %s: %s\n", state,
1778 acpi_name(h), AcpiFormatException(status));
1784 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids)
1786 int result, cid_count, i;
1787 uint32_t lid, cids[8];
1789 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1792 * ISA-style drivers attached to ACPI may persist and
1793 * probe manually if we return ENOENT. We never want
1794 * that to happen, so don't ever return it.
1798 /* Scan the supplied IDs for a match */
1799 lid = acpi_isa_get_logicalid(child);
1800 cid_count = acpi_isa_get_compatid(child, cids, 8);
1801 while (ids && ids->ip_id) {
1802 if (lid == ids->ip_id) {
1806 for (i = 0; i < cid_count; i++) {
1807 if (cids[i] == ids->ip_id) {
1816 if (result == 0 && ids->ip_desc)
1817 device_set_desc(child, ids->ip_desc);
1819 return_VALUE (result);
1822 #if defined(__i386__) || defined(__amd64__)
1824 * Look for a MCFG table. If it is present, use the settings for
1825 * domain (segment) 0 to setup PCI config space access via the memory
1829 acpi_enable_pcie(void)
1831 ACPI_TABLE_HEADER *hdr;
1832 ACPI_MCFG_ALLOCATION *alloc, *end;
1835 status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr);
1836 if (ACPI_FAILURE(status))
1839 end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length);
1840 alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1);
1841 while (alloc < end) {
1842 if (alloc->PciSegment == 0) {
1843 pcie_cfgregopen(alloc->Address, alloc->StartBusNumber,
1844 alloc->EndBusNumber);
1853 * Scan all of the ACPI namespace and attach child devices.
1855 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and
1856 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec.
1857 * However, in violation of the spec, some systems place their PCI link
1858 * devices in \, so we have to walk the whole namespace. We check the
1859 * type of namespace nodes, so this should be ok.
1862 acpi_probe_children(device_t bus)
1865 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1868 * Scan the namespace and insert placeholders for all the devices that
1869 * we find. We also probe/attach any early devices.
1871 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because
1872 * we want to create nodes for all devices, not just those that are
1873 * currently present. (This assumes that we don't want to create/remove
1874 * devices as they appear, which might be smarter.)
1876 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n"));
1877 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, acpi_probe_child,
1880 /* Pre-allocate resources for our rman from any sysresource devices. */
1881 acpi_sysres_alloc(bus);
1883 /* Reserve resources already allocated to children. */
1884 acpi_reserve_resources(bus);
1886 /* Create any static children by calling device identify methods. */
1887 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n"));
1888 bus_generic_probe(bus);
1890 /* Probe/attach all children, created statically and from the namespace. */
1891 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "acpi bus_generic_attach\n"));
1892 bus_generic_attach(bus);
1894 /* Attach wake sysctls. */
1895 acpi_wake_sysctl_walk(bus);
1897 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n"));
1902 * Determine the probe order for a given device.
1905 acpi_probe_order(ACPI_HANDLE handle, int *order)
1907 ACPI_OBJECT_TYPE type;
1911 * 1. I/O port and memory system resource holders
1912 * 2. Clocks and timers (to handle early accesses)
1913 * 3. Embedded controllers (to handle early accesses)
1914 * 4. PCI Link Devices
1916 AcpiGetType(handle, &type);
1917 if (type == ACPI_TYPE_PROCESSOR)
1919 else if (acpi_MatchHid(handle, "PNP0C01") ||
1920 acpi_MatchHid(handle, "PNP0C02"))
1922 else if (acpi_MatchHid(handle, "PNP0100") ||
1923 acpi_MatchHid(handle, "PNP0103") ||
1924 acpi_MatchHid(handle, "PNP0B00"))
1926 else if (acpi_MatchHid(handle, "PNP0C09"))
1928 else if (acpi_MatchHid(handle, "PNP0C0F"))
1933 * Evaluate a child device and determine whether we might attach a device to
1937 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status)
1939 struct acpi_prw_data prw;
1940 ACPI_OBJECT_TYPE type;
1942 device_t bus, child;
1946 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1948 if (acpi_disabled("children"))
1949 return_ACPI_STATUS (AE_OK);
1951 /* Skip this device if we think we'll have trouble with it. */
1952 if (acpi_avoid(handle))
1953 return_ACPI_STATUS (AE_OK);
1955 bus = (device_t)context;
1956 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) {
1957 handle_str = acpi_name(handle);
1959 case ACPI_TYPE_DEVICE:
1961 * Since we scan from \, be sure to skip system scope objects.
1962 * \_SB_ and \_TZ_ are defined in ACPICA as devices to work around
1963 * BIOS bugs. For example, \_SB_ is to allow \_SB_._INI to be run
1964 * during the intialization and \_TZ_ is to support Notify() on it.
1966 if (strcmp(handle_str, "\\_SB_") == 0 ||
1967 strcmp(handle_str, "\\_TZ_") == 0)
1969 if (acpi_parse_prw(handle, &prw) == 0)
1970 AcpiSetupGpeForWake(handle, prw.gpe_handle, prw.gpe_bit);
1973 * Ignore devices that do not have a _HID or _CID. They should
1974 * be discovered by other buses (e.g. the PCI bus driver).
1976 if (!acpi_has_hid(handle))
1979 case ACPI_TYPE_PROCESSOR:
1980 case ACPI_TYPE_THERMAL:
1981 case ACPI_TYPE_POWER:
1983 * Create a placeholder device for this node. Sort the
1984 * placeholder so that the probe/attach passes will run
1985 * breadth-first. Orders less than ACPI_DEV_BASE_ORDER
1986 * are reserved for special objects (i.e., system
1989 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str));
1990 order = level * 10 + ACPI_DEV_BASE_ORDER;
1991 acpi_probe_order(handle, &order);
1992 child = BUS_ADD_CHILD(bus, order, NULL, -1);
1996 /* Associate the handle with the device_t and vice versa. */
1997 acpi_set_handle(child, handle);
1998 AcpiAttachData(handle, acpi_fake_objhandler, child);
2001 * Check that the device is present. If it's not present,
2002 * leave it disabled (so that we have a device_t attached to
2003 * the handle, but we don't probe it).
2005 * XXX PCI link devices sometimes report "present" but not
2006 * "functional" (i.e. if disabled). Go ahead and probe them
2007 * anyway since we may enable them later.
2009 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) {
2010 /* Never disable PCI link devices. */
2011 if (acpi_MatchHid(handle, "PNP0C0F"))
2014 * Docking stations should remain enabled since the system
2015 * may be undocked at boot.
2017 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h)))
2020 device_disable(child);
2025 * Get the device's resource settings and attach them.
2026 * Note that if the device has _PRS but no _CRS, we need
2027 * to decide when it's appropriate to try to configure the
2028 * device. Ignore the return value here; it's OK for the
2029 * device not to have any resources.
2031 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL);
2036 return_ACPI_STATUS (AE_OK);
2040 * AcpiAttachData() requires an object handler but never uses it. This is a
2041 * placeholder object handler so we can store a device_t in an ACPI_HANDLE.
2044 acpi_fake_objhandler(ACPI_HANDLE h, void *data)
2049 acpi_shutdown_final(void *arg, int howto)
2051 struct acpi_softc *sc = (struct acpi_softc *)arg;
2056 * XXX Shutdown code should only run on the BSP (cpuid 0).
2057 * Some chipsets do not power off the system correctly if called from
2060 if ((howto & RB_POWEROFF) != 0) {
2061 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5);
2062 if (ACPI_FAILURE(status)) {
2063 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n",
2064 AcpiFormatException(status));
2067 device_printf(sc->acpi_dev, "Powering system off\n");
2068 intr = intr_disable();
2069 status = AcpiEnterSleepState(ACPI_STATE_S5);
2070 if (ACPI_FAILURE(status)) {
2072 device_printf(sc->acpi_dev, "power-off failed - %s\n",
2073 AcpiFormatException(status));
2077 device_printf(sc->acpi_dev, "power-off failed - timeout\n");
2079 } else if ((howto & RB_HALT) == 0 && sc->acpi_handle_reboot) {
2080 /* Reboot using the reset register. */
2081 status = AcpiReset();
2082 if (ACPI_SUCCESS(status)) {
2084 device_printf(sc->acpi_dev, "reset failed - timeout\n");
2085 } else if (status != AE_NOT_EXIST)
2086 device_printf(sc->acpi_dev, "reset failed - %s\n",
2087 AcpiFormatException(status));
2088 } else if (sc->acpi_do_disable && panicstr == NULL) {
2090 * Only disable ACPI if the user requested. On some systems, writing
2091 * the disable value to SMI_CMD hangs the system.
2093 device_printf(sc->acpi_dev, "Shutting down\n");
2099 acpi_enable_fixed_events(struct acpi_softc *sc)
2101 static int first_time = 1;
2103 /* Enable and clear fixed events and install handlers. */
2104 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) {
2105 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON);
2106 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON,
2107 acpi_event_power_button_sleep, sc);
2109 device_printf(sc->acpi_dev, "Power Button (fixed)\n");
2111 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) {
2112 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON);
2113 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON,
2114 acpi_event_sleep_button_sleep, sc);
2116 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n");
2123 * Returns true if the device is actually present and should
2124 * be attached to. This requires the present, enabled, UI-visible
2125 * and diagnostics-passed bits to be set.
2128 acpi_DeviceIsPresent(device_t dev)
2130 ACPI_DEVICE_INFO *devinfo;
2134 if ((h = acpi_get_handle(dev)) == NULL ||
2135 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
2138 /* If no _STA method, must be present */
2139 present = (devinfo->Valid & ACPI_VALID_STA) == 0 ||
2140 ACPI_DEVICE_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE;
2142 AcpiOsFree(devinfo);
2147 * Returns true if the battery is actually present and inserted.
2150 acpi_BatteryIsPresent(device_t dev)
2152 ACPI_DEVICE_INFO *devinfo;
2156 if ((h = acpi_get_handle(dev)) == NULL ||
2157 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
2160 /* If no _STA method, must be present */
2161 present = (devinfo->Valid & ACPI_VALID_STA) == 0 ||
2162 ACPI_BATTERY_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE;
2164 AcpiOsFree(devinfo);
2169 * Returns true if a device has at least one valid device ID.
2172 acpi_has_hid(ACPI_HANDLE h)
2174 ACPI_DEVICE_INFO *devinfo;
2178 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
2182 if ((devinfo->Valid & ACPI_VALID_HID) != 0)
2184 else if ((devinfo->Valid & ACPI_VALID_CID) != 0)
2185 if (devinfo->CompatibleIdList.Count > 0)
2188 AcpiOsFree(devinfo);
2193 * Match a HID string against a handle
2196 acpi_MatchHid(ACPI_HANDLE h, const char *hid)
2198 ACPI_DEVICE_INFO *devinfo;
2202 if (hid == NULL || h == NULL ||
2203 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
2207 if ((devinfo->Valid & ACPI_VALID_HID) != 0 &&
2208 strcmp(hid, devinfo->HardwareId.String) == 0)
2210 else if ((devinfo->Valid & ACPI_VALID_CID) != 0)
2211 for (i = 0; i < devinfo->CompatibleIdList.Count; i++) {
2212 if (strcmp(hid, devinfo->CompatibleIdList.Ids[i].String) == 0) {
2218 AcpiOsFree(devinfo);
2223 * Return the handle of a named object within our scope, ie. that of (parent)
2224 * or one if its parents.
2227 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result)
2232 /* Walk back up the tree to the root */
2234 status = AcpiGetHandle(parent, path, &r);
2235 if (ACPI_SUCCESS(status)) {
2239 /* XXX Return error here? */
2240 if (status != AE_NOT_FOUND)
2242 if (ACPI_FAILURE(AcpiGetParent(parent, &r)))
2243 return (AE_NOT_FOUND);
2249 * Allocate a buffer with a preset data size.
2252 acpi_AllocBuffer(int size)
2256 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL)
2259 buf->Pointer = (void *)(buf + 1);
2264 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number)
2267 ACPI_OBJECT_LIST args;
2269 arg1.Type = ACPI_TYPE_INTEGER;
2270 arg1.Integer.Value = number;
2272 args.Pointer = &arg1;
2274 return (AcpiEvaluateObject(handle, path, &args, NULL));
2278 * Evaluate a path that should return an integer.
2281 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number)
2288 handle = ACPI_ROOT_OBJECT;
2291 * Assume that what we've been pointed at is an Integer object, or
2292 * a method that will return an Integer.
2294 buf.Pointer = ¶m;
2295 buf.Length = sizeof(param);
2296 status = AcpiEvaluateObject(handle, path, NULL, &buf);
2297 if (ACPI_SUCCESS(status)) {
2298 if (param.Type == ACPI_TYPE_INTEGER)
2299 *number = param.Integer.Value;
2305 * In some applications, a method that's expected to return an Integer
2306 * may instead return a Buffer (probably to simplify some internal
2307 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer,
2308 * convert it into an Integer as best we can.
2312 if (status == AE_BUFFER_OVERFLOW) {
2313 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) {
2314 status = AE_NO_MEMORY;
2316 status = AcpiEvaluateObject(handle, path, NULL, &buf);
2317 if (ACPI_SUCCESS(status))
2318 status = acpi_ConvertBufferToInteger(&buf, number);
2319 AcpiOsFree(buf.Pointer);
2326 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number)
2332 p = (ACPI_OBJECT *)bufp->Pointer;
2333 if (p->Type == ACPI_TYPE_INTEGER) {
2334 *number = p->Integer.Value;
2337 if (p->Type != ACPI_TYPE_BUFFER)
2339 if (p->Buffer.Length > sizeof(int))
2340 return (AE_BAD_DATA);
2343 val = p->Buffer.Pointer;
2344 for (i = 0; i < p->Buffer.Length; i++)
2345 *number += val[i] << (i * 8);
2350 * Iterate over the elements of an a package object, calling the supplied
2351 * function for each element.
2353 * XXX possible enhancement might be to abort traversal on error.
2356 acpi_ForeachPackageObject(ACPI_OBJECT *pkg,
2357 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg)
2362 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE)
2363 return (AE_BAD_PARAMETER);
2365 /* Iterate over components */
2367 comp = pkg->Package.Elements;
2368 for (; i < pkg->Package.Count; i++, comp++)
2375 * Find the (index)th resource object in a set.
2378 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp)
2383 rp = (ACPI_RESOURCE *)buf->Pointer;
2387 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length))
2388 return (AE_BAD_PARAMETER);
2390 /* Check for terminator */
2391 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0)
2392 return (AE_NOT_FOUND);
2393 rp = ACPI_NEXT_RESOURCE(rp);
2402 * Append an ACPI_RESOURCE to an ACPI_BUFFER.
2404 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER
2405 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible
2406 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of
2409 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512
2412 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res)
2417 /* Initialise the buffer if necessary. */
2418 if (buf->Pointer == NULL) {
2419 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE;
2420 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL)
2421 return (AE_NO_MEMORY);
2422 rp = (ACPI_RESOURCE *)buf->Pointer;
2423 rp->Type = ACPI_RESOURCE_TYPE_END_TAG;
2424 rp->Length = ACPI_RS_SIZE_MIN;
2430 * Scan the current buffer looking for the terminator.
2431 * This will either find the terminator or hit the end
2432 * of the buffer and return an error.
2434 rp = (ACPI_RESOURCE *)buf->Pointer;
2436 /* Range check, don't go outside the buffer */
2437 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length))
2438 return (AE_BAD_PARAMETER);
2439 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0)
2441 rp = ACPI_NEXT_RESOURCE(rp);
2445 * Check the size of the buffer and expand if required.
2448 * size of existing resources before terminator +
2449 * size of new resource and header +
2450 * size of terminator.
2452 * Note that this loop should really only run once, unless
2453 * for some reason we are stuffing a *really* huge resource.
2455 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) +
2456 res->Length + ACPI_RS_SIZE_NO_DATA +
2457 ACPI_RS_SIZE_MIN) >= buf->Length) {
2458 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL)
2459 return (AE_NO_MEMORY);
2460 bcopy(buf->Pointer, newp, buf->Length);
2461 rp = (ACPI_RESOURCE *)((u_int8_t *)newp +
2462 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer));
2463 AcpiOsFree(buf->Pointer);
2464 buf->Pointer = newp;
2465 buf->Length += buf->Length;
2468 /* Insert the new resource. */
2469 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA);
2471 /* And add the terminator. */
2472 rp = ACPI_NEXT_RESOURCE(rp);
2473 rp->Type = ACPI_RESOURCE_TYPE_END_TAG;
2474 rp->Length = ACPI_RS_SIZE_MIN;
2480 * Set interrupt model.
2483 acpi_SetIntrModel(int model)
2486 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model));
2490 * Walk subtables of a table and call a callback routine for each
2491 * subtable. The caller should provide the first subtable and a
2492 * pointer to the end of the table. This can be used to walk tables
2493 * such as MADT and SRAT that use subtable entries.
2496 acpi_walk_subtables(void *first, void *end, acpi_subtable_handler *handler,
2499 ACPI_SUBTABLE_HEADER *entry;
2501 for (entry = first; (void *)entry < end; ) {
2502 /* Avoid an infinite loop if we hit a bogus entry. */
2503 if (entry->Length < sizeof(ACPI_SUBTABLE_HEADER))
2506 handler(entry, arg);
2507 entry = ACPI_ADD_PTR(ACPI_SUBTABLE_HEADER, entry, entry->Length);
2512 * DEPRECATED. This interface has serious deficiencies and will be
2515 * Immediately enter the sleep state. In the old model, acpiconf(8) ran
2516 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this.
2519 acpi_SetSleepState(struct acpi_softc *sc, int state)
2524 device_printf(sc->acpi_dev,
2525 "warning: acpi_SetSleepState() deprecated, need to update your software\n");
2528 return (acpi_EnterSleepState(sc, state));
2531 #if defined(__amd64__) || defined(__i386__)
2533 acpi_sleep_force_task(void *context)
2535 struct acpi_softc *sc = (struct acpi_softc *)context;
2537 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate)))
2538 device_printf(sc->acpi_dev, "force sleep state S%d failed\n",
2539 sc->acpi_next_sstate);
2543 acpi_sleep_force(void *arg)
2545 struct acpi_softc *sc = (struct acpi_softc *)arg;
2547 device_printf(sc->acpi_dev,
2548 "suspend request timed out, forcing sleep now\n");
2550 * XXX Suspending from callout causes freezes in DEVICE_SUSPEND().
2551 * Suspend from acpi_task thread instead.
2553 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER,
2554 acpi_sleep_force_task, sc)))
2555 device_printf(sc->acpi_dev, "AcpiOsExecute() for sleeping failed\n");
2560 * Request that the system enter the given suspend state. All /dev/apm
2561 * devices and devd(8) will be notified. Userland then has a chance to
2562 * save state and acknowledge the request. The system sleeps once all
2566 acpi_ReqSleepState(struct acpi_softc *sc, int state)
2568 #if defined(__amd64__) || defined(__i386__)
2569 struct apm_clone_data *clone;
2572 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX)
2574 if (!acpi_sleep_states[state])
2575 return (EOPNOTSUPP);
2578 * If a reboot/shutdown/suspend request is already in progress or
2579 * suspend is blocked due to an upcoming shutdown, just return.
2581 if (rebooting || sc->acpi_next_sstate != 0 || suspend_blocked) {
2585 /* Wait until sleep is enabled. */
2586 while (sc->acpi_sleep_disabled) {
2592 sc->acpi_next_sstate = state;
2594 /* S5 (soft-off) should be entered directly with no waiting. */
2595 if (state == ACPI_STATE_S5) {
2597 status = acpi_EnterSleepState(sc, state);
2598 return (ACPI_SUCCESS(status) ? 0 : ENXIO);
2601 /* Record the pending state and notify all apm devices. */
2602 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) {
2603 clone->notify_status = APM_EV_NONE;
2604 if ((clone->flags & ACPI_EVF_DEVD) == 0) {
2605 selwakeuppri(&clone->sel_read, PZERO);
2606 KNOTE_LOCKED(&clone->sel_read.si_note, 0);
2610 /* If devd(8) is not running, immediately enter the sleep state. */
2611 if (!devctl_process_running()) {
2613 status = acpi_EnterSleepState(sc, state);
2614 return (ACPI_SUCCESS(status) ? 0 : ENXIO);
2618 * Set a timeout to fire if userland doesn't ack the suspend request
2619 * in time. This way we still eventually go to sleep if we were
2620 * overheating or running low on battery, even if userland is hung.
2621 * We cancel this timeout once all userland acks are in or the
2622 * suspend request is aborted.
2624 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc);
2627 /* Now notify devd(8) also. */
2628 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state);
2632 /* This platform does not support acpi suspend/resume. */
2633 return (EOPNOTSUPP);
2638 * Acknowledge (or reject) a pending sleep state. The caller has
2639 * prepared for suspend and is now ready for it to proceed. If the
2640 * error argument is non-zero, it indicates suspend should be cancelled
2641 * and gives an errno value describing why. Once all votes are in,
2642 * we suspend the system.
2645 acpi_AckSleepState(struct apm_clone_data *clone, int error)
2647 #if defined(__amd64__) || defined(__i386__)
2648 struct acpi_softc *sc;
2651 /* If no pending sleep state, return an error. */
2653 sc = clone->acpi_sc;
2654 if (sc->acpi_next_sstate == 0) {
2659 /* Caller wants to abort suspend process. */
2661 sc->acpi_next_sstate = 0;
2662 callout_stop(&sc->susp_force_to);
2663 device_printf(sc->acpi_dev,
2664 "listener on %s cancelled the pending suspend\n",
2665 devtoname(clone->cdev));
2671 * Mark this device as acking the suspend request. Then, walk through
2672 * all devices, seeing if they agree yet. We only count devices that
2673 * are writable since read-only devices couldn't ack the request.
2676 clone->notify_status = APM_EV_ACKED;
2677 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) {
2678 if ((clone->flags & ACPI_EVF_WRITE) != 0 &&
2679 clone->notify_status != APM_EV_ACKED) {
2685 /* If all devices have voted "yes", we will suspend now. */
2687 callout_stop(&sc->susp_force_to);
2691 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate)))
2696 /* This platform does not support acpi suspend/resume. */
2697 return (EOPNOTSUPP);
2702 acpi_sleep_enable(void *arg)
2704 struct acpi_softc *sc = (struct acpi_softc *)arg;
2706 ACPI_LOCK_ASSERT(acpi);
2708 /* Reschedule if the system is not fully up and running. */
2709 if (!AcpiGbl_SystemAwakeAndRunning) {
2710 callout_schedule(&acpi_sleep_timer, hz * ACPI_MINIMUM_AWAKETIME);
2714 sc->acpi_sleep_disabled = FALSE;
2718 acpi_sleep_disable(struct acpi_softc *sc)
2722 /* Fail if the system is not fully up and running. */
2723 if (!AcpiGbl_SystemAwakeAndRunning)
2727 status = sc->acpi_sleep_disabled ? AE_ERROR : AE_OK;
2728 sc->acpi_sleep_disabled = TRUE;
2734 enum acpi_sleep_state {
2737 ACPI_SS_DEV_SUSPEND,
2743 * Enter the desired system sleep state.
2745 * Currently we support S1-S5 but S4 is only S4BIOS
2748 acpi_EnterSleepState(struct acpi_softc *sc, int state)
2752 ACPI_EVENT_STATUS power_button_status;
2753 enum acpi_sleep_state slp_state;
2756 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
2758 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX)
2759 return_ACPI_STATUS (AE_BAD_PARAMETER);
2760 if (!acpi_sleep_states[state]) {
2761 device_printf(sc->acpi_dev, "Sleep state S%d not supported by BIOS\n",
2763 return (AE_SUPPORT);
2766 /* Re-entry once we're suspending is not allowed. */
2767 status = acpi_sleep_disable(sc);
2768 if (ACPI_FAILURE(status)) {
2769 device_printf(sc->acpi_dev,
2770 "suspend request ignored (not ready yet)\n");
2774 if (state == ACPI_STATE_S5) {
2776 * Shut down cleanly and power off. This will call us back through the
2777 * shutdown handlers.
2779 shutdown_nice(RB_POWEROFF);
2780 return_ACPI_STATUS (AE_OK);
2783 EVENTHANDLER_INVOKE(power_suspend_early);
2785 EVENTHANDLER_INVOKE(power_suspend);
2788 thread_lock(curthread);
2789 sched_bind(curthread, 0);
2790 thread_unlock(curthread);
2794 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE
2795 * drivers need this.
2799 slp_state = ACPI_SS_NONE;
2801 sc->acpi_sstate = state;
2803 /* Enable any GPEs as appropriate and requested by the user. */
2804 acpi_wake_prep_walk(state);
2805 slp_state = ACPI_SS_GPE_SET;
2808 * Inform all devices that we are going to sleep. If at least one
2809 * device fails, DEVICE_SUSPEND() automatically resumes the tree.
2811 * XXX Note that a better two-pass approach with a 'veto' pass
2812 * followed by a "real thing" pass would be better, but the current
2813 * bus interface does not provide for this.
2815 if (DEVICE_SUSPEND(root_bus) != 0) {
2816 device_printf(sc->acpi_dev, "device_suspend failed\n");
2819 slp_state = ACPI_SS_DEV_SUSPEND;
2821 /* If testing device suspend only, back out of everything here. */
2822 if (acpi_susp_bounce)
2825 status = AcpiEnterSleepStatePrep(state);
2826 if (ACPI_FAILURE(status)) {
2827 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n",
2828 AcpiFormatException(status));
2831 slp_state = ACPI_SS_SLP_PREP;
2833 if (sc->acpi_sleep_delay > 0)
2834 DELAY(sc->acpi_sleep_delay * 1000000);
2836 intr = intr_disable();
2837 if (state != ACPI_STATE_S1) {
2838 sleep_result = acpi_sleep_machdep(sc, state);
2839 acpi_wakeup_machdep(sc, state, sleep_result, 0);
2842 * XXX According to ACPI specification SCI_EN bit should be restored
2843 * by ACPI platform (BIOS, firmware) to its pre-sleep state.
2844 * Unfortunately some BIOSes fail to do that and that leads to
2845 * unexpected and serious consequences during wake up like a system
2846 * getting stuck in SMI handlers.
2847 * This hack is picked up from Linux, which claims that it follows
2850 if (sleep_result == 1 && state != ACPI_STATE_S4)
2851 AcpiWriteBitRegister(ACPI_BITREG_SCI_ENABLE, ACPI_ENABLE_EVENT);
2853 AcpiLeaveSleepStatePrep(state);
2855 if (sleep_result == 1 && state == ACPI_STATE_S3) {
2857 * Prevent mis-interpretation of the wakeup by power button
2858 * as a request for power off.
2859 * Ideally we should post an appropriate wakeup event,
2860 * perhaps using acpi_event_power_button_wake or alike.
2862 * Clearing of power button status after wakeup is mandated
2863 * by ACPI specification in section "Fixed Power Button".
2865 * XXX As of ACPICA 20121114 AcpiGetEventStatus provides
2866 * status as 0/1 corressponding to inactive/active despite
2867 * its type being ACPI_EVENT_STATUS. In other words,
2868 * we should not test for ACPI_EVENT_FLAG_SET for time being.
2870 if (ACPI_SUCCESS(AcpiGetEventStatus(ACPI_EVENT_POWER_BUTTON,
2871 &power_button_status)) && power_button_status != 0) {
2872 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON);
2873 device_printf(sc->acpi_dev,
2874 "cleared fixed power button status\n");
2880 /* call acpi_wakeup_machdep() again with interrupt enabled */
2881 acpi_wakeup_machdep(sc, state, sleep_result, 1);
2883 if (sleep_result == -1)
2886 /* Re-enable ACPI hardware on wakeup from sleep state 4. */
2887 if (state == ACPI_STATE_S4)
2890 status = AcpiEnterSleepState(state);
2891 AcpiLeaveSleepStatePrep(state);
2893 if (ACPI_FAILURE(status)) {
2894 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n",
2895 AcpiFormatException(status));
2899 slp_state = ACPI_SS_SLEPT;
2902 * Back out state according to how far along we got in the suspend
2903 * process. This handles both the error and success cases.
2906 if (slp_state >= ACPI_SS_GPE_SET) {
2907 acpi_wake_prep_walk(state);
2908 sc->acpi_sstate = ACPI_STATE_S0;
2910 if (slp_state >= ACPI_SS_DEV_SUSPEND)
2911 DEVICE_RESUME(root_bus);
2912 if (slp_state >= ACPI_SS_SLP_PREP)
2913 AcpiLeaveSleepState(state);
2914 if (slp_state >= ACPI_SS_SLEPT) {
2915 acpi_resync_clock(sc);
2916 acpi_enable_fixed_events(sc);
2918 sc->acpi_next_sstate = 0;
2923 thread_lock(curthread);
2924 sched_unbind(curthread);
2925 thread_unlock(curthread);
2930 EVENTHANDLER_INVOKE(power_resume);
2932 /* Allow another sleep request after a while. */
2933 callout_schedule(&acpi_sleep_timer, hz * ACPI_MINIMUM_AWAKETIME);
2935 /* Run /etc/rc.resume after we are back. */
2936 if (devctl_process_running())
2937 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state);
2939 return_ACPI_STATUS (status);
2943 acpi_resync_clock(struct acpi_softc *sc)
2946 if (!acpi_reset_clock)
2950 * Warm up timecounter again and reset system clock.
2952 (void)timecounter->tc_get_timecount(timecounter);
2953 (void)timecounter->tc_get_timecount(timecounter);
2954 inittodr(time_second + sc->acpi_sleep_delay);
2958 /* Enable or disable the device's wake GPE. */
2960 acpi_wake_set_enable(device_t dev, int enable)
2962 struct acpi_prw_data prw;
2966 /* Make sure the device supports waking the system and get the GPE. */
2967 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0)
2970 flags = acpi_get_flags(dev);
2972 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit,
2974 if (ACPI_FAILURE(status)) {
2975 device_printf(dev, "enable wake failed\n");
2978 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED);
2980 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit,
2982 if (ACPI_FAILURE(status)) {
2983 device_printf(dev, "disable wake failed\n");
2986 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED);
2993 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate)
2995 struct acpi_prw_data prw;
2998 /* Check that this is a wake-capable device and get its GPE. */
2999 if (acpi_parse_prw(handle, &prw) != 0)
3001 dev = acpi_get_device(handle);
3004 * The destination sleep state must be less than (i.e., higher power)
3005 * or equal to the value specified by _PRW. If this GPE cannot be
3006 * enabled for the next sleep state, then disable it. If it can and
3007 * the user requested it be enabled, turn on any required power resources
3010 if (sstate > prw.lowest_wake) {
3011 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_DISABLE);
3013 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n",
3014 acpi_name(handle), sstate);
3015 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) {
3016 acpi_pwr_wake_enable(handle, 1);
3017 acpi_SetInteger(handle, "_PSW", 1);
3019 device_printf(dev, "wake_prep enabled for %s (S%d)\n",
3020 acpi_name(handle), sstate);
3027 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate)
3029 struct acpi_prw_data prw;
3033 * Check that this is a wake-capable device and get its GPE. Return
3034 * now if the user didn't enable this device for wake.
3036 if (acpi_parse_prw(handle, &prw) != 0)
3038 dev = acpi_get_device(handle);
3039 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0)
3043 * If this GPE couldn't be enabled for the previous sleep state, it was
3044 * disabled before going to sleep so re-enable it. If it was enabled,
3045 * clear _PSW and turn off any power resources it used.
3047 if (sstate > prw.lowest_wake) {
3048 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_ENABLE);
3050 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle));
3052 acpi_SetInteger(handle, "_PSW", 0);
3053 acpi_pwr_wake_enable(handle, 0);
3055 device_printf(dev, "run_prep cleaned up for %s\n",
3063 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status)
3067 /* If suspending, run the sleep prep function, otherwise wake. */
3068 sstate = *(int *)context;
3069 if (AcpiGbl_SystemAwakeAndRunning)
3070 acpi_wake_sleep_prep(handle, sstate);
3072 acpi_wake_run_prep(handle, sstate);
3076 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */
3078 acpi_wake_prep_walk(int sstate)
3080 ACPI_HANDLE sb_handle;
3082 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle)))
3083 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100,
3084 acpi_wake_prep, NULL, &sstate, NULL);
3088 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */
3090 acpi_wake_sysctl_walk(device_t dev)
3092 int error, i, numdevs;
3097 error = device_get_children(dev, &devlist, &numdevs);
3098 if (error != 0 || numdevs == 0) {
3100 free(devlist, M_TEMP);
3103 for (i = 0; i < numdevs; i++) {
3105 acpi_wake_sysctl_walk(child);
3106 if (!device_is_attached(child))
3108 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL);
3109 if (ACPI_SUCCESS(status)) {
3110 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child),
3111 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO,
3112 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0,
3113 acpi_wake_set_sysctl, "I", "Device set to wake the system");
3116 free(devlist, M_TEMP);
3121 /* Enable or disable wake from userland. */
3123 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS)
3128 dev = (device_t)arg1;
3129 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0;
3131 error = sysctl_handle_int(oidp, &enable, 0, req);
3132 if (error != 0 || req->newptr == NULL)
3134 if (enable != 0 && enable != 1)
3137 return (acpi_wake_set_enable(dev, enable));
3140 /* Parse a device's _PRW into a structure. */
3142 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw)
3145 ACPI_BUFFER prw_buffer;
3146 ACPI_OBJECT *res, *res2;
3147 int error, i, power_count;
3149 if (h == NULL || prw == NULL)
3153 * The _PRW object (7.2.9) is only required for devices that have the
3154 * ability to wake the system from a sleeping state.
3157 prw_buffer.Pointer = NULL;
3158 prw_buffer.Length = ACPI_ALLOCATE_BUFFER;
3159 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer);
3160 if (ACPI_FAILURE(status))
3162 res = (ACPI_OBJECT *)prw_buffer.Pointer;
3165 if (!ACPI_PKG_VALID(res, 2))
3169 * Element 1 of the _PRW object:
3170 * The lowest power system sleeping state that can be entered while still
3171 * providing wake functionality. The sleeping state being entered must
3172 * be less than (i.e., higher power) or equal to this value.
3174 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0)
3178 * Element 0 of the _PRW object:
3180 switch (res->Package.Elements[0].Type) {
3181 case ACPI_TYPE_INTEGER:
3183 * If the data type of this package element is numeric, then this
3184 * _PRW package element is the bit index in the GPEx_EN, in the
3185 * GPE blocks described in the FADT, of the enable bit that is
3186 * enabled for the wake event.
3188 prw->gpe_handle = NULL;
3189 prw->gpe_bit = res->Package.Elements[0].Integer.Value;
3192 case ACPI_TYPE_PACKAGE:
3194 * If the data type of this package element is a package, then this
3195 * _PRW package element is itself a package containing two
3196 * elements. The first is an object reference to the GPE Block
3197 * device that contains the GPE that will be triggered by the wake
3198 * event. The second element is numeric and it contains the bit
3199 * index in the GPEx_EN, in the GPE Block referenced by the
3200 * first element in the package, of the enable bit that is enabled for
3203 * For example, if this field is a package then it is of the form:
3204 * Package() {\_SB.PCI0.ISA.GPE, 2}
3206 res2 = &res->Package.Elements[0];
3207 if (!ACPI_PKG_VALID(res2, 2))
3209 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]);
3210 if (prw->gpe_handle == NULL)
3212 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0)
3220 /* Elements 2 to N of the _PRW object are power resources. */
3221 power_count = res->Package.Count - 2;
3222 if (power_count > ACPI_PRW_MAX_POWERRES) {
3223 printf("ACPI device %s has too many power resources\n", acpi_name(h));
3226 prw->power_res_count = power_count;
3227 for (i = 0; i < power_count; i++)
3228 prw->power_res[i] = res->Package.Elements[i];
3231 if (prw_buffer.Pointer != NULL)
3232 AcpiOsFree(prw_buffer.Pointer);
3237 * ACPI Event Handlers
3240 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */
3243 acpi_system_eventhandler_sleep(void *arg, int state)
3245 struct acpi_softc *sc = (struct acpi_softc *)arg;
3248 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
3250 /* Check if button action is disabled or unknown. */
3251 if (state == ACPI_STATE_UNKNOWN)
3254 /* Request that the system prepare to enter the given suspend state. */
3255 ret = acpi_ReqSleepState(sc, state);
3257 device_printf(sc->acpi_dev,
3258 "request to enter state S%d failed (err %d)\n", state, ret);
3264 acpi_system_eventhandler_wakeup(void *arg, int state)
3267 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
3269 /* Currently, nothing to do for wakeup. */
3275 * ACPICA Event Handlers (FixedEvent, also called from button notify handler)
3278 acpi_invoke_sleep_eventhandler(void *context)
3281 EVENTHANDLER_INVOKE(acpi_sleep_event, *(int *)context);
3285 acpi_invoke_wake_eventhandler(void *context)
3288 EVENTHANDLER_INVOKE(acpi_wakeup_event, *(int *)context);
3292 acpi_event_power_button_sleep(void *context)
3294 struct acpi_softc *sc = (struct acpi_softc *)context;
3296 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
3298 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER,
3299 acpi_invoke_sleep_eventhandler, &sc->acpi_power_button_sx)))
3300 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
3301 return_VALUE (ACPI_INTERRUPT_HANDLED);
3305 acpi_event_power_button_wake(void *context)
3307 struct acpi_softc *sc = (struct acpi_softc *)context;
3309 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
3311 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER,
3312 acpi_invoke_wake_eventhandler, &sc->acpi_power_button_sx)))
3313 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
3314 return_VALUE (ACPI_INTERRUPT_HANDLED);
3318 acpi_event_sleep_button_sleep(void *context)
3320 struct acpi_softc *sc = (struct acpi_softc *)context;
3322 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
3324 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER,
3325 acpi_invoke_sleep_eventhandler, &sc->acpi_sleep_button_sx)))
3326 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
3327 return_VALUE (ACPI_INTERRUPT_HANDLED);
3331 acpi_event_sleep_button_wake(void *context)
3333 struct acpi_softc *sc = (struct acpi_softc *)context;
3335 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
3337 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER,
3338 acpi_invoke_wake_eventhandler, &sc->acpi_sleep_button_sx)))
3339 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
3340 return_VALUE (ACPI_INTERRUPT_HANDLED);
3344 * XXX This static buffer is suboptimal. There is no locking so only
3345 * use this for single-threaded callers.
3348 acpi_name(ACPI_HANDLE handle)
3351 static char data[256];
3353 buf.Length = sizeof(data);
3356 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf)))
3358 return ("(unknown)");
3362 * Debugging/bug-avoidance. Avoid trying to fetch info on various
3363 * parts of the namespace.
3366 acpi_avoid(ACPI_HANDLE handle)
3368 char *cp, *env, *np;
3371 np = acpi_name(handle);
3374 if ((env = kern_getenv("debug.acpi.avoid")) == NULL)
3377 /* Scan the avoid list checking for a match */
3380 while (*cp != 0 && isspace(*cp))
3385 while (cp[len] != 0 && !isspace(cp[len]))
3387 if (!strncmp(cp, np, len)) {
3399 * Debugging/bug-avoidance. Disable ACPI subsystem components.
3402 acpi_disabled(char *subsys)
3407 if ((env = kern_getenv("debug.acpi.disabled")) == NULL)
3409 if (strcmp(env, "all") == 0) {
3414 /* Scan the disable list, checking for a match. */
3417 while (*cp != '\0' && isspace(*cp))
3422 while (cp[len] != '\0' && !isspace(cp[len]))
3424 if (strncmp(cp, subsys, len) == 0) {
3436 acpi_lookup(void *arg, const char *name, device_t *dev)
3444 * Allow any handle name that is specified as an absolute path and
3445 * starts with '\'. We could restrict this to \_SB and friends,
3446 * but see acpi_probe_children() for notes on why we scan the entire
3447 * namespace for devices.
3449 * XXX: The pathname argument to AcpiGetHandle() should be fixed to
3452 if (name[0] != '\\')
3454 if (ACPI_FAILURE(AcpiGetHandle(ACPI_ROOT_OBJECT, __DECONST(char *, name),
3457 *dev = acpi_get_device(handle);
3461 * Control interface.
3463 * We multiplex ioctls for all participating ACPI devices here. Individual
3464 * drivers wanting to be accessible via /dev/acpi should use the
3465 * register/deregister interface to make their handlers visible.
3467 struct acpi_ioctl_hook
3469 TAILQ_ENTRY(acpi_ioctl_hook) link;
3475 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks;
3476 static int acpi_ioctl_hooks_initted;
3479 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg)
3481 struct acpi_ioctl_hook *hp;
3483 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL)
3490 if (acpi_ioctl_hooks_initted == 0) {
3491 TAILQ_INIT(&acpi_ioctl_hooks);
3492 acpi_ioctl_hooks_initted = 1;
3494 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link);
3501 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn)
3503 struct acpi_ioctl_hook *hp;
3506 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link)
3507 if (hp->cmd == cmd && hp->fn == fn)
3511 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link);
3512 free(hp, M_ACPIDEV);
3518 acpiopen(struct cdev *dev, int flag, int fmt, struct thread *td)
3524 acpiclose(struct cdev *dev, int flag, int fmt, struct thread *td)
3530 acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
3532 struct acpi_softc *sc;
3533 struct acpi_ioctl_hook *hp;
3541 * Scan the list of registered ioctls, looking for handlers.
3544 if (acpi_ioctl_hooks_initted)
3545 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) {
3551 return (hp->fn(cmd, addr, hp->arg));
3554 * Core ioctls are not permitted for non-writable user.
3555 * Currently, other ioctls just fetch information.
3556 * Not changing system behavior.
3558 if ((flag & FWRITE) == 0)
3561 /* Core system ioctls. */
3563 case ACPIIO_REQSLPSTATE:
3564 state = *(int *)addr;
3565 if (state != ACPI_STATE_S5)
3566 return (acpi_ReqSleepState(sc, state));
3567 device_printf(sc->acpi_dev, "power off via acpi ioctl not supported\n");
3570 case ACPIIO_ACKSLPSTATE:
3571 error = *(int *)addr;
3572 error = acpi_AckSleepState(sc->acpi_clone, error);
3574 case ACPIIO_SETSLPSTATE: /* DEPRECATED */
3575 state = *(int *)addr;
3576 if (state < ACPI_STATE_S0 || state > ACPI_S_STATES_MAX)
3578 if (!acpi_sleep_states[state])
3579 return (EOPNOTSUPP);
3580 if (ACPI_FAILURE(acpi_SetSleepState(sc, state)))
3592 acpi_sname2sstate(const char *sname)
3596 if (toupper(sname[0]) == 'S') {
3597 sstate = sname[1] - '0';
3598 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5 &&
3601 } else if (strcasecmp(sname, "NONE") == 0)
3602 return (ACPI_STATE_UNKNOWN);
3607 acpi_sstate2sname(int sstate)
3609 static const char *snames[] = { "S0", "S1", "S2", "S3", "S4", "S5" };
3611 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5)
3612 return (snames[sstate]);
3613 else if (sstate == ACPI_STATE_UNKNOWN)
3619 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
3625 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND);
3626 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++)
3627 if (acpi_sleep_states[state])
3628 sbuf_printf(&sb, "%s ", acpi_sstate2sname(state));
3631 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req);
3637 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
3639 char sleep_state[10];
3640 int error, new_state, old_state;
3642 old_state = *(int *)oidp->oid_arg1;
3643 strlcpy(sleep_state, acpi_sstate2sname(old_state), sizeof(sleep_state));
3644 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req);
3645 if (error == 0 && req->newptr != NULL) {
3646 new_state = acpi_sname2sstate(sleep_state);
3647 if (new_state < ACPI_STATE_S1)
3649 if (new_state < ACPI_S_STATE_COUNT && !acpi_sleep_states[new_state])
3650 return (EOPNOTSUPP);
3651 if (new_state != old_state)
3652 *(int *)oidp->oid_arg1 = new_state;
3657 /* Inform devctl(4) when we receive a Notify. */
3659 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify)
3661 char notify_buf[16];
3662 ACPI_BUFFER handle_buf;
3665 if (subsystem == NULL)
3668 handle_buf.Pointer = NULL;
3669 handle_buf.Length = ACPI_ALLOCATE_BUFFER;
3670 status = AcpiNsHandleToPathname(h, &handle_buf, FALSE);
3671 if (ACPI_FAILURE(status))
3673 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify);
3674 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf);
3675 AcpiOsFree(handle_buf.Pointer);
3680 * Support for parsing debug options from the kernel environment.
3682 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers
3683 * by specifying the names of the bits in the debug.acpi.layer and
3684 * debug.acpi.level environment variables. Bits may be unset by
3685 * prefixing the bit name with !.
3693 static struct debugtag dbg_layer[] = {
3694 {"ACPI_UTILITIES", ACPI_UTILITIES},
3695 {"ACPI_HARDWARE", ACPI_HARDWARE},
3696 {"ACPI_EVENTS", ACPI_EVENTS},
3697 {"ACPI_TABLES", ACPI_TABLES},
3698 {"ACPI_NAMESPACE", ACPI_NAMESPACE},
3699 {"ACPI_PARSER", ACPI_PARSER},
3700 {"ACPI_DISPATCHER", ACPI_DISPATCHER},
3701 {"ACPI_EXECUTER", ACPI_EXECUTER},
3702 {"ACPI_RESOURCES", ACPI_RESOURCES},
3703 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER},
3704 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES},
3705 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER},
3706 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS},
3708 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER},
3709 {"ACPI_BATTERY", ACPI_BATTERY},
3710 {"ACPI_BUS", ACPI_BUS},
3711 {"ACPI_BUTTON", ACPI_BUTTON},
3712 {"ACPI_EC", ACPI_EC},
3713 {"ACPI_FAN", ACPI_FAN},
3714 {"ACPI_POWERRES", ACPI_POWERRES},
3715 {"ACPI_PROCESSOR", ACPI_PROCESSOR},
3716 {"ACPI_THERMAL", ACPI_THERMAL},
3717 {"ACPI_TIMER", ACPI_TIMER},
3718 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS},
3722 static struct debugtag dbg_level[] = {
3723 {"ACPI_LV_INIT", ACPI_LV_INIT},
3724 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT},
3725 {"ACPI_LV_INFO", ACPI_LV_INFO},
3726 {"ACPI_LV_REPAIR", ACPI_LV_REPAIR},
3727 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS},
3729 /* Trace verbosity level 1 [Standard Trace Level] */
3730 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES},
3731 {"ACPI_LV_PARSE", ACPI_LV_PARSE},
3732 {"ACPI_LV_LOAD", ACPI_LV_LOAD},
3733 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH},
3734 {"ACPI_LV_EXEC", ACPI_LV_EXEC},
3735 {"ACPI_LV_NAMES", ACPI_LV_NAMES},
3736 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION},
3737 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD},
3738 {"ACPI_LV_TABLES", ACPI_LV_TABLES},
3739 {"ACPI_LV_VALUES", ACPI_LV_VALUES},
3740 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS},
3741 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES},
3742 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS},
3743 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE},
3744 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1},
3746 /* Trace verbosity level 2 [Function tracing and memory allocation] */
3747 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS},
3748 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS},
3749 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS},
3750 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2},
3751 {"ACPI_LV_ALL", ACPI_LV_ALL},
3753 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */
3754 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX},
3755 {"ACPI_LV_THREADS", ACPI_LV_THREADS},
3756 {"ACPI_LV_IO", ACPI_LV_IO},
3757 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS},
3758 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3},
3760 /* Exceptionally verbose output -- also used in the global "DebugLevel" */
3761 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE},
3762 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO},
3763 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES},
3764 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS},
3765 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE},
3770 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag)
3782 while (*ep && !isspace(*ep))
3793 for (i = 0; tag[i].name != NULL; i++) {
3794 if (!strncmp(cp, tag[i].name, l)) {
3796 *flag |= tag[i].value;
3798 *flag &= ~tag[i].value;
3806 acpi_set_debugging(void *junk)
3808 char *layer, *level;
3815 layer = kern_getenv("debug.acpi.layer");
3816 level = kern_getenv("debug.acpi.level");
3817 if (layer == NULL && level == NULL)
3820 printf("ACPI set debug");
3821 if (layer != NULL) {
3822 if (strcmp("NONE", layer) != 0)
3823 printf(" layer '%s'", layer);
3824 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer);
3827 if (level != NULL) {
3828 if (strcmp("NONE", level) != 0)
3829 printf(" level '%s'", level);
3830 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel);
3836 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging,
3840 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS)
3843 struct debugtag *tag;
3847 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL)
3849 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) {
3850 tag = &dbg_layer[0];
3851 dbg = &AcpiDbgLayer;
3853 tag = &dbg_level[0];
3854 dbg = &AcpiDbgLevel;
3857 /* Get old values if this is a get request. */
3858 ACPI_SERIAL_BEGIN(acpi);
3860 sbuf_cpy(&sb, "NONE");
3861 } else if (req->newptr == NULL) {
3862 for (; tag->name != NULL; tag++) {
3863 if ((*dbg & tag->value) == tag->value)
3864 sbuf_printf(&sb, "%s ", tag->name);
3869 strlcpy(temp, sbuf_data(&sb), sizeof(temp));
3872 error = sysctl_handle_string(oidp, temp, sizeof(temp), req);
3874 /* Check for error or no change */
3875 if (error == 0 && req->newptr != NULL) {
3877 kern_setenv((char *)oidp->oid_arg1, temp);
3878 acpi_set_debugging(NULL);
3880 ACPI_SERIAL_END(acpi);
3885 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING,
3886 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", "");
3887 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING,
3888 "debug.acpi.level", 0, acpi_debug_sysctl, "A", "");
3889 #endif /* ACPI_DEBUG */
3892 acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS)
3897 old = acpi_debug_objects;
3898 error = sysctl_handle_int(oidp, &acpi_debug_objects, 0, req);
3899 if (error != 0 || req->newptr == NULL)
3901 if (old == acpi_debug_objects || (old && acpi_debug_objects))
3904 ACPI_SERIAL_BEGIN(acpi);
3905 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE;
3906 ACPI_SERIAL_END(acpi);
3912 acpi_parse_interfaces(char *str, struct acpi_interface *iface)
3919 while (isspace(*p) || *p == ',')
3924 p = strdup(p, M_TEMP);
3925 for (i = 0; i < len; i++)
3930 if (isspace(p[i]) || p[i] == '\0')
3933 i += strlen(p + i) + 1;
3940 iface->data = malloc(sizeof(*iface->data) * j, M_TEMP, M_WAITOK);
3944 if (isspace(p[i]) || p[i] == '\0')
3947 iface->data[j] = p + i;
3948 i += strlen(p + i) + 1;
3956 acpi_free_interfaces(struct acpi_interface *iface)
3959 free(iface->data[0], M_TEMP);
3960 free(iface->data, M_TEMP);
3964 acpi_reset_interfaces(device_t dev)
3966 struct acpi_interface list;
3970 if (acpi_parse_interfaces(acpi_install_interface, &list) > 0) {
3971 for (i = 0; i < list.num; i++) {
3972 status = AcpiInstallInterface(list.data[i]);
3973 if (ACPI_FAILURE(status))
3975 "failed to install _OSI(\"%s\"): %s\n",
3976 list.data[i], AcpiFormatException(status));
3977 else if (bootverbose)
3978 device_printf(dev, "installed _OSI(\"%s\")\n",
3981 acpi_free_interfaces(&list);
3983 if (acpi_parse_interfaces(acpi_remove_interface, &list) > 0) {
3984 for (i = 0; i < list.num; i++) {
3985 status = AcpiRemoveInterface(list.data[i]);
3986 if (ACPI_FAILURE(status))
3988 "failed to remove _OSI(\"%s\"): %s\n",
3989 list.data[i], AcpiFormatException(status));
3990 else if (bootverbose)
3991 device_printf(dev, "removed _OSI(\"%s\")\n",
3994 acpi_free_interfaces(&list);
3999 acpi_pm_func(u_long cmd, void *arg, ...)
4001 int state, acpi_state;
4003 struct acpi_softc *sc;
4008 case POWER_CMD_SUSPEND:
4009 sc = (struct acpi_softc *)arg;
4016 state = va_arg(ap, int);
4020 case POWER_SLEEP_STATE_STANDBY:
4021 acpi_state = sc->acpi_standby_sx;
4023 case POWER_SLEEP_STATE_SUSPEND:
4024 acpi_state = sc->acpi_suspend_sx;
4026 case POWER_SLEEP_STATE_HIBERNATE:
4027 acpi_state = ACPI_STATE_S4;
4034 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state)))
4047 acpi_pm_register(void *arg)
4049 if (!cold || resource_disabled("acpi", 0))
4052 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL);
4055 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0);