2 * Copyright (c) 2000 Takanori Watanabe <takawata@jp.kfreebsd.org>
3 * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.kfreebsd.org>
4 * Copyright (c) 2000, 2001 Michael Smith
5 * Copyright (c) 2000 BSDi
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * $FreeBSD: src/sys/dev/acpica/acpi.c,v 1.243.2.4.4.1 2009/04/15 03:14:26 kensmith Exp $
33 #include <sys/param.h>
34 #include <sys/kernel.h>
36 #include <sys/fcntl.h>
37 #include <sys/malloc.h>
38 #include <sys/module.h>
41 #include <sys/reboot.h>
42 #include <sys/sysctl.h>
43 #include <sys/ctype.h>
44 #include <sys/linker.h>
45 #include <sys/power.h>
47 #include <sys/device.h>
48 #include <sys/spinlock.h>
49 #include <sys/spinlock2.h>
53 #include <bus/isa/isavar.h>
54 #include <bus/isa/pnpvar.h>
57 #include <dev/acpica/acpivar.h>
58 #include <dev/acpica/acpiio.h>
64 #include <bus/pci/pci_cfgreg.h>
65 #include <bus/pci/pcivar.h>
66 #include <bus/pci/pci_private.h>
68 #include <vm/vm_param.h>
70 MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices");
72 /* Hooks for the ACPICA debugging infrastructure */
73 #define _COMPONENT ACPI_BUS
74 ACPI_MODULE_NAME("ACPI");
76 static d_open_t acpiopen;
77 static d_close_t acpiclose;
78 static d_ioctl_t acpiioctl;
80 static struct dev_ops acpi_ops = {
87 struct acpi_interface {
92 /* Global mutex for locking access to the ACPI subsystem. */
93 struct lock acpi_lock;
95 /* Bitmap of device quirks. */
98 static int acpi_modevent(struct module *mod, int event, void *junk);
99 static void acpi_identify(driver_t *driver, device_t parent);
100 static int acpi_probe(device_t dev);
101 static int acpi_attach(device_t dev);
102 static int acpi_suspend(device_t dev);
103 static int acpi_resume(device_t dev);
104 static int acpi_shutdown(device_t dev);
105 static device_t acpi_add_child(device_t bus, device_t parent, int order, const char *name,
107 static int acpi_print_child(device_t bus, device_t child);
108 static void acpi_probe_nomatch(device_t bus, device_t child);
109 static void acpi_driver_added(device_t dev, driver_t *driver);
110 static int acpi_read_ivar(device_t dev, device_t child, int index,
112 static int acpi_write_ivar(device_t dev, device_t child, int index,
114 static struct resource_list *acpi_get_rlist(device_t dev, device_t child);
115 static int acpi_sysres_alloc(device_t dev);
116 static struct resource *acpi_alloc_resource(device_t bus, device_t child,
117 int type, int *rid, u_long start, u_long end,
118 u_long count, u_int flags, int cpuid);
119 static int acpi_release_resource(device_t bus, device_t child, int type,
120 int rid, struct resource *r);
121 static void acpi_delete_resource(device_t bus, device_t child, int type,
123 static uint32_t acpi_isa_get_logicalid(device_t dev);
124 static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count);
125 static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids);
126 static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev,
127 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters,
129 static int acpi_device_pwr_for_sleep(device_t bus, device_t dev,
131 static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level,
132 void *context, void **retval);
133 static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev,
134 int max_depth, acpi_scan_cb_t user_fn, void *arg);
135 static int acpi_set_powerstate_method(device_t bus, device_t child,
137 static int acpi_isa_pnp_probe(device_t bus, device_t child,
138 struct isa_pnp_id *ids);
139 static void acpi_probe_children(device_t bus);
140 static void acpi_probe_order(ACPI_HANDLE handle, int *order);
141 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level,
142 void *context, void **status);
143 static ACPI_STATUS acpi_EnterSleepState(struct acpi_softc *sc, int state);
144 static void acpi_shutdown_final(void *arg, int howto);
145 static void acpi_enable_fixed_events(struct acpi_softc *sc);
146 static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate);
147 static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate);
148 static int acpi_wake_prep_walk(int sstate);
149 static int acpi_wake_sysctl_walk(device_t dev);
151 static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS);
153 static void acpi_system_eventhandler_sleep(void *arg, int state);
154 static void acpi_system_eventhandler_wakeup(void *arg, int state);
155 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS);
156 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS);
157 static int acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS);
158 static int acpi_pm_func(u_long cmd, void *arg, ...);
159 static int acpi_child_location_str_method(device_t acdev, device_t child,
160 char *buf, size_t buflen);
161 static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child,
162 char *buf, size_t buflen);
163 static void acpi_enable_pcie(void);
164 static void acpi_reset_interfaces(device_t dev);
166 static device_method_t acpi_methods[] = {
167 /* Device interface */
168 DEVMETHOD(device_identify, acpi_identify),
169 DEVMETHOD(device_probe, acpi_probe),
170 DEVMETHOD(device_attach, acpi_attach),
171 DEVMETHOD(device_shutdown, acpi_shutdown),
172 DEVMETHOD(device_detach, bus_generic_detach),
173 DEVMETHOD(device_suspend, acpi_suspend),
174 DEVMETHOD(device_resume, acpi_resume),
177 DEVMETHOD(bus_add_child, acpi_add_child),
178 DEVMETHOD(bus_print_child, acpi_print_child),
179 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch),
180 DEVMETHOD(bus_driver_added, acpi_driver_added),
181 DEVMETHOD(bus_read_ivar, acpi_read_ivar),
182 DEVMETHOD(bus_write_ivar, acpi_write_ivar),
183 DEVMETHOD(bus_get_resource_list, acpi_get_rlist),
184 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource),
185 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
186 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource),
187 DEVMETHOD(bus_release_resource, acpi_release_resource),
188 DEVMETHOD(bus_delete_resource, acpi_delete_resource),
189 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method),
190 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method),
191 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
192 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
193 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
194 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
197 DEVMETHOD(acpi_id_probe, acpi_device_id_probe),
198 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj),
199 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep),
200 DEVMETHOD(acpi_scan_children, acpi_device_scan_children),
203 DEVMETHOD(pci_set_powerstate, acpi_set_powerstate_method),
206 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe),
211 static driver_t acpi_driver = {
214 sizeof(struct acpi_softc),
217 static devclass_t acpi_devclass;
218 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, NULL);
219 MODULE_VERSION(acpi, 1);
221 ACPI_SERIAL_DECL(acpi, "ACPI serializer");
223 /* Local pools for managing system resources for ACPI child devices. */
224 static struct rman acpi_rman_io, acpi_rman_mem;
226 #define ACPI_MINIMUM_AWAKETIME 5
228 static const char* sleep_state_names[] = {
229 "S0", "S1", "S2", "S3", "S4", "S5", "NONE"};
231 SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging");
232 static char acpi_ca_version[12];
233 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD,
234 acpi_ca_version, 0, "Version of Intel ACPICA");
237 * Allow overriding _OSI methods.
239 static char acpi_install_interface[256];
240 TUNABLE_STR("hw.acpi.install_interface", acpi_install_interface,
241 sizeof(acpi_install_interface));
242 static char acpi_remove_interface[256];
243 TUNABLE_STR("hw.acpi.remove_interface", acpi_remove_interface,
244 sizeof(acpi_remove_interface));
247 * Use this tunable to disable the control method auto-serialization
248 * mechanism that was added in 20140214 and superseded the previous
249 * AcpiGbl_SerializeAllMethods global.
251 static int acpi_auto_serialize_methods = 1;
252 TUNABLE_INT("hw.acpi.auto_serialize_methods", &acpi_auto_serialize_methods);
254 /* Allow users to dump Debug objects without ACPI debugger. */
255 static int acpi_debug_objects;
256 TUNABLE_INT("debug.acpi.enable_debug_objects", &acpi_debug_objects);
257 SYSCTL_PROC(_debug_acpi, OID_AUTO, enable_debug_objects,
258 CTLFLAG_RW | CTLTYPE_INT, NULL, 0, acpi_debug_objects_sysctl, "I",
259 "Enable Debug objects.");
261 /* Allow ignoring the XSDT. */
262 static int acpi_ignore_xsdt;
263 TUNABLE_INT("debug.acpi.ignore_xsdt", &acpi_ignore_xsdt);
264 SYSCTL_INT(_debug_acpi, OID_AUTO, ignore_xsdt, CTLFLAG_RD,
265 &acpi_ignore_xsdt, 1, "Ignore the XSDT, forcing the use of the RSDT.");
267 /* Allow the interpreter to ignore common mistakes in BIOS. */
268 static int acpi_interpreter_slack = 1;
269 TUNABLE_INT("debug.acpi.interpreter_slack", &acpi_interpreter_slack);
270 SYSCTL_INT(_debug_acpi, OID_AUTO, interpreter_slack, CTLFLAG_RD,
271 &acpi_interpreter_slack, 1, "Turn on interpreter slack mode.");
273 /* Allow preferring 32-bit FADT register addresses over the 64-bit ones. */
274 static int acpi_fadt_addr32;
275 TUNABLE_INT("debug.acpi.fadt_addr32", &acpi_fadt_addr32);
276 SYSCTL_INT(_debug_acpi, OID_AUTO, fadt_addr32, CTLFLAG_RD,
277 &acpi_fadt_addr32, 1,
278 "Prefer 32-bit FADT register addresses over 64-bit ones.");
280 /* Power devices off and on in suspend and resume. XXX Remove once tested. */
281 static int acpi_do_powerstate = 1;
282 TUNABLE_INT("debug.acpi.do_powerstate", &acpi_do_powerstate);
283 SYSCTL_INT(_debug_acpi, OID_AUTO, do_powerstate, CTLFLAG_RW,
284 &acpi_do_powerstate, 1, "Turn off devices when suspending.");
286 /* Allow users to override quirks. */
287 TUNABLE_INT("debug.acpi.quirks", &acpi_quirks);
289 static int acpi_susp_bounce;
290 SYSCTL_INT(_debug_acpi, OID_AUTO, suspend_bounce, CTLFLAG_RW,
291 &acpi_susp_bounce, 0, "Don't actually suspend, just test devices.");
294 * ACPI can only be loaded as a module by the loader; activating it after
295 * system bootstrap time is not useful, and can be fatal to the system.
296 * It also cannot be unloaded, since the entire system bus heirarchy hangs
300 acpi_modevent(struct module *mod, int event, void *junk)
305 kprintf("The ACPI driver cannot be loaded after boot.\n");
310 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI)
320 * Perform early initialization.
325 static int started = 0;
329 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
331 /* Only run the startup code once. The MADT driver also calls this. */
333 return_VALUE (AE_OK);
337 * Pre-allocate space for RSDT/XSDT and DSDT tables and allow resizing
338 * if more tables exist.
340 if (ACPI_FAILURE(status = AcpiInitializeTables(NULL, 2, TRUE))) {
341 kprintf("ACPI: Table initialisation failed: %s\n",
342 AcpiFormatException(status));
343 return_VALUE (status);
346 /* Set up any quirks we have for this system. */
347 if (acpi_quirks == ACPI_Q_OK)
348 acpi_table_quirks(&acpi_quirks);
350 /* If the user manually set the disabled hint to 0, force-enable ACPI. */
351 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0)
352 acpi_quirks &= ~ACPI_Q_BROKEN;
353 if (acpi_quirks & ACPI_Q_BROKEN) {
354 kprintf("ACPI disabled by blacklist. Contact your BIOS vendor.\n");
358 return_VALUE (status);
362 * Detect ACPI, perform early initialisation
365 acpi_identify(driver_t *driver, device_t parent)
369 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
374 /* Check that we haven't been disabled with a hint. */
375 if (resource_disabled("acpi", 0))
378 /* Make sure we're not being doubly invoked. */
379 if (device_find_child(parent, "acpi", 0) != NULL)
382 ksnprintf(acpi_ca_version, sizeof(acpi_ca_version), "%x", ACPI_CA_VERSION);
384 /* Initialize root tables. */
385 if (ACPI_FAILURE(acpi_Startup())) {
386 kprintf("ACPI: Try disabling either ACPI or apic support.\n");
390 /* Attach the actual ACPI device. */
391 if ((child = BUS_ADD_CHILD(parent, parent, 10, "acpi", 0)) == NULL) {
392 device_printf(parent, "device_identify failed\n");
398 * Fetch some descriptive data from ACPI to put in our attach message.
401 acpi_probe(device_t dev)
403 ACPI_TABLE_RSDP *rsdp;
404 ACPI_TABLE_HEADER *rsdt;
405 ACPI_PHYSICAL_ADDRESS paddr;
406 char buf[ACPI_OEM_ID_SIZE + ACPI_OEM_TABLE_ID_SIZE + 2];
409 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
411 if (power_pm_get_type() != POWER_PM_TYPE_NONE &&
412 power_pm_get_type() != POWER_PM_TYPE_ACPI) {
413 device_printf(dev, "probe failed, other PM system enabled.\n");
414 return_VALUE (ENXIO);
417 if ((paddr = AcpiOsGetRootPointer()) == 0 ||
418 (rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP))) == NULL)
419 return_VALUE (ENXIO);
420 if (acpi_ignore_xsdt == 0 &&
421 rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress != 0)
422 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress;
424 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress;
425 AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP));
427 if ((rsdt = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER))) == NULL)
428 return_VALUE (ENXIO);
429 sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN);
430 sbuf_bcat(&sb, rsdt->OemId, ACPI_OEM_ID_SIZE);
433 sbuf_bcat(&sb, rsdt->OemTableId, ACPI_OEM_TABLE_ID_SIZE);
436 device_set_desc_copy(dev, sbuf_data(&sb));
438 AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER));
444 acpi_attach(device_t dev)
446 struct acpi_softc *sc;
453 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
455 sc = device_get_softc(dev);
457 callout_init(&sc->susp_force_to);
459 if ((error = acpi_task_thread_init())) {
460 device_printf(dev, "Could not start task thread.\n");
466 /* Initialize resource manager. */
467 acpi_rman_io.rm_type = RMAN_ARRAY;
468 acpi_rman_io.rm_start = 0;
469 acpi_rman_io.rm_end = 0xffff;
470 acpi_rman_io.rm_descr = "ACPI I/O ports";
471 if (rman_init(&acpi_rman_io, -1) != 0)
472 panic("acpi rman_init IO ports failed");
473 acpi_rman_mem.rm_type = RMAN_ARRAY;
474 acpi_rman_mem.rm_start = 0;
475 acpi_rman_mem.rm_end = ~0ul;
476 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses";
477 if (rman_init(&acpi_rman_mem, -1) != 0)
478 panic("acpi rman_init memory failed");
480 /* Initialise the ACPI mutex */
481 ACPI_LOCK_INIT(acpi, "acpi");
482 ACPI_SERIAL_INIT(acpi);
485 * Set the globals from our tunables. This is needed because ACPICA
486 * uses UINT8 for some values and we have no tunable_byte.
488 AcpiGbl_AutoSerializeMethods = acpi_auto_serialize_methods ? TRUE : FALSE;
489 AcpiGbl_DoNotUseXsdt = acpi_ignore_xsdt ? TRUE : FALSE;
490 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE;
491 AcpiGbl_EnableInterpreterSlack = acpi_interpreter_slack ? TRUE : FALSE;
492 AcpiGbl_Use32BitFadtAddresses = acpi_fadt_addr32 ? TRUE : FALSE;
496 * Disable Debug Object output.
498 AcpiDbgLevel &= ~ACPI_LV_DEBUG_OBJECT;
501 /* Start up the ACPICA subsystem. */
502 status = AcpiInitializeSubsystem();
503 if (ACPI_FAILURE(status)) {
504 device_printf(dev, "Could not initialize Subsystem: %s\n",
505 AcpiFormatException(status));
509 /* Override OS interfaces if the user requested. */
510 acpi_reset_interfaces(dev);
512 /* Load ACPI name space. */
513 status = AcpiLoadTables();
514 if (ACPI_FAILURE(status)) {
515 device_printf(dev, "Could not load Namespace: %s\n",
516 AcpiFormatException(status));
520 /* Handle MCFG table if present. */
524 * Note that some systems (specifically, those with namespace evaluation
525 * issues that require the avoidance of parts of the namespace) must
526 * avoid running _INI and _STA on everything, as well as dodging the final
529 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT).
531 * XXX We should arrange for the object init pass after we have attached
532 * all our child devices, but on many systems it works here.
534 flags = ACPI_FULL_INITIALIZATION;
535 if (ktestenv("debug.acpi.avoid"))
536 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT;
538 /* Bring the hardware and basic handlers online. */
539 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) {
540 device_printf(dev, "Could not enable ACPI: %s\n",
541 AcpiFormatException(status));
546 * Fix up the interrupt timer after enabling ACPI, so that the
547 * interrupt cputimer that choked by ACPI power management could
548 * be resurrected before probing various devices.
551 cputimer_intr_pmfixup();
554 * Call the ECDT probe function to provide EC functionality before
555 * the namespace has been evaluated.
557 * XXX This happens before the sysresource devices have been probed and
558 * attached so its resources come from nexus0. In practice, this isn't
559 * a problem but should be addressed eventually.
561 acpi_ec_ecdt_probe(dev);
563 /* Bring device objects and regions online. */
564 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) {
565 device_printf(dev, "Could not initialize ACPI objects: %s\n",
566 AcpiFormatException(status));
571 * Setup our sysctl tree.
573 * XXX: This doesn't check to make sure that none of these fail.
575 sysctl_ctx_init(&sc->acpi_sysctl_ctx);
576 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx,
577 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO,
578 device_get_name(dev), CTLFLAG_RD, 0, "");
579 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
580 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD,
581 0, 0, acpi_supported_sleep_state_sysctl, "A", "");
582 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
583 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW,
584 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", "");
585 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
586 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW,
587 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", "");
588 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
589 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW,
590 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", "");
591 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
592 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW,
593 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", "");
594 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
595 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW,
596 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", "");
597 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
598 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0,
600 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
601 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode");
602 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
603 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode");
604 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
605 OID_AUTO, "disable_on_reboot", CTLFLAG_RW,
606 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system");
607 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
608 OID_AUTO, "handle_reboot", CTLFLAG_RW,
609 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot");
612 * Default to 1 second before sleeping to give some machines time to
615 sc->acpi_sleep_delay = 1;
617 sc->acpi_verbose = 1;
618 if ((env = kgetenv("hw.acpi.verbose")) != NULL) {
619 if (strcmp(env, "0") != 0)
620 sc->acpi_verbose = 1;
624 /* Only enable reboot by default if the FADT says it is available. */
625 if (AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER)
626 sc->acpi_handle_reboot = 1;
628 /* Only enable S4BIOS by default if the FACS says it is available. */
629 if (AcpiGbl_FACS->Flags & ACPI_FACS_S4_BIOS_PRESENT)
633 * Dispatch the default sleep state to devices. The lid switch is set
634 * to NONE by default to avoid surprising users.
636 sc->acpi_power_button_sx = ACPI_STATE_S5;
637 sc->acpi_lid_switch_sx = ACPI_S_STATES_MAX + 1;
638 sc->acpi_standby_sx = ACPI_STATE_S1;
639 sc->acpi_suspend_sx = ACPI_STATE_S3;
641 /* Pick the first valid sleep state for the sleep button default. */
642 sc->acpi_sleep_button_sx = ACPI_S_STATES_MAX + 1;
643 for (state = ACPI_STATE_S1; state <= ACPI_STATE_S4; state++)
644 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) {
645 sc->acpi_sleep_button_sx = state;
649 acpi_enable_fixed_events(sc);
652 * Scan the namespace and attach/initialise children.
655 /* Register our shutdown handler. */
656 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc,
660 * Register our acpi event handlers.
661 * XXX should be configurable eg. via userland policy manager.
663 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep,
664 sc, ACPI_EVENT_PRI_LAST);
665 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup,
666 sc, ACPI_EVENT_PRI_LAST);
668 /* Flag our initial states. */
669 sc->acpi_enabled = 1;
670 sc->acpi_sstate = ACPI_STATE_S0;
671 sc->acpi_sleep_disabled = 0;
672 /* Create the control device */
673 sc->acpi_dev_t = make_dev(&acpi_ops, 0, UID_ROOT, GID_WHEEL, 0644,
675 sc->acpi_dev_t->si_drv1 = sc;
677 if ((error = acpi_machdep_init(dev)))
680 /* Register ACPI again to pass the correct argument of pm_func. */
681 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc);
683 if (!acpi_disabled("bus"))
684 acpi_probe_children(dev);
686 /* Update all GPEs and enable runtime GPEs. */
687 status = AcpiUpdateAllGpes();
688 if (ACPI_FAILURE(status)) {
689 device_printf(dev, "Could not update all GPEs: %s\n",
690 AcpiFormatException(status));
693 /* Allow sleep request after a while. */
694 /* timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); */
699 cputimer_intr_pmfixup();
700 acpi_task_thread_schedule();
701 return_VALUE (error);
705 acpi_suspend(device_t dev)
707 device_t child, *devlist;
708 int error, i, numdevs, pstate;
710 /* First give child devices a chance to suspend. */
711 error = bus_generic_suspend(dev);
716 * Now, set them into the appropriate power state, usually D3. If the
717 * device has an _SxD method for the next sleep state, use that power
720 device_get_children(dev, &devlist, &numdevs);
721 for (i = 0; i < numdevs; i++) {
722 /* If the device is not attached, we've powered it down elsewhere. */
724 if (!device_is_attached(child))
728 * Default to D3 for all sleep states. The _SxD method is optional
729 * so set the powerstate even if it's absent.
731 pstate = PCI_POWERSTATE_D3;
732 error = acpi_device_pwr_for_sleep(device_get_parent(child),
734 if ((error == 0 || error == ESRCH) && acpi_do_powerstate)
735 pci_set_powerstate(child, pstate);
737 kfree(devlist, M_TEMP);
744 acpi_resume(device_t dev)
748 device_t child, *devlist;
751 * Put all devices in D0 before resuming them. Call _S0D on each one
752 * since some systems expect this.
754 device_get_children(dev, &devlist, &numdevs);
755 for (i = 0; i < numdevs; i++) {
757 handle = acpi_get_handle(child);
759 AcpiEvaluateObject(handle, "_S0D", NULL, NULL);
760 if (device_is_attached(child) && acpi_do_powerstate)
761 pci_set_powerstate(child, PCI_POWERSTATE_D0);
763 kfree(devlist, M_TEMP);
765 return (bus_generic_resume(dev));
769 acpi_shutdown(device_t dev)
771 /* Allow children to shutdown first. */
772 bus_generic_shutdown(dev);
775 * Enable any GPEs that are able to power-on the system (i.e., RTC).
776 * Also, disable any that are not valid for this state (most).
778 acpi_wake_prep_walk(ACPI_STATE_S5);
784 * Handle a new device being added
787 acpi_add_child(device_t bus, device_t parent, int order, const char *name, int unit)
789 struct acpi_device *ad;
792 if ((ad = kmalloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL)
795 resource_list_init(&ad->ad_rl);
796 child = device_add_child_ordered(parent, order, name, unit);
798 device_set_ivars(child, ad);
800 kfree(ad, M_ACPIDEV);
805 acpi_print_child(device_t bus, device_t child)
807 struct acpi_device *adev = device_get_ivars(child);
808 struct resource_list *rl = &adev->ad_rl;
811 retval += bus_print_child_header(bus, child);
812 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx");
813 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx");
814 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
815 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld");
816 if (device_get_flags(child))
817 retval += kprintf(" flags %#x", device_get_flags(child));
818 retval += bus_print_child_footer(bus, child);
824 * If this device is an ACPI child but no one claimed it, attempt
825 * to power it off. We'll power it back up when a driver is added.
827 * XXX Disabled for now since many necessary devices (like fdc and
828 * ATA) don't claim the devices we created for them but still expect
829 * them to be powered up.
832 acpi_probe_nomatch(device_t bus, device_t child)
835 /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */
839 * If a new driver has a chance to probe a child, first power it up.
841 * XXX Disabled for now (see acpi_probe_nomatch for details).
844 acpi_driver_added(device_t dev, driver_t *driver)
846 device_t child, *devlist;
849 DEVICE_IDENTIFY(driver, dev);
850 device_get_children(dev, &devlist, &numdevs);
851 for (i = 0; i < numdevs; i++) {
853 if (device_get_state(child) == DS_NOTPRESENT) {
854 /* pci_set_powerstate(child, PCI_POWERSTATE_D0); */
855 if (device_probe_and_attach(child) != 0)
856 ; /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */
859 kfree(devlist, M_TEMP);
862 /* Location hint for devctl(8) */
864 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf,
867 struct acpi_device *dinfo = device_get_ivars(child);
869 if (dinfo->ad_handle)
870 ksnprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle));
872 ksnprintf(buf, buflen, "unknown");
876 /* PnP information for devctl(8) */
878 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf,
881 ACPI_DEVICE_INFO *adinfo;
882 struct acpi_device *dinfo = device_get_ivars(child);
885 if (ACPI_FAILURE(AcpiGetObjectInfo(dinfo->ad_handle, &adinfo))) {
886 ksnprintf(buf, buflen, "unknown");
888 ksnprintf(buf, buflen, "_HID=%s _UID=%lu",
889 (adinfo->Valid & ACPI_VALID_HID) ?
890 adinfo->HardwareId.String : "none",
891 (adinfo->Valid & ACPI_VALID_UID) ?
892 strtoul(adinfo->UniqueId.String, &end, 10) : 0);
900 * Handle per-device ivars
903 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
905 struct acpi_device *ad;
907 if ((ad = device_get_ivars(child)) == NULL) {
908 device_printf(child, "device has no ivars\n");
912 /* ACPI and ISA compatibility ivars */
914 case ACPI_IVAR_HANDLE:
915 *(ACPI_HANDLE *)result = ad->ad_handle;
917 case ACPI_IVAR_MAGIC:
918 *result = ad->ad_magic;
920 case ACPI_IVAR_PRIVATE:
921 *(void **)result = ad->ad_private;
923 case ACPI_IVAR_FLAGS:
924 *(int *)result = ad->ad_flags;
926 case ISA_IVAR_VENDORID:
927 case ISA_IVAR_SERIAL:
928 case ISA_IVAR_COMPATID:
931 case ISA_IVAR_LOGICALID:
932 *(int *)result = acpi_isa_get_logicalid(child);
942 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value)
944 struct acpi_device *ad;
946 if ((ad = device_get_ivars(child)) == NULL) {
947 device_printf(child, "device has no ivars\n");
952 case ACPI_IVAR_HANDLE:
953 ad->ad_handle = (ACPI_HANDLE)value;
955 case ACPI_IVAR_MAGIC:
956 ad->ad_magic = value;
958 case ACPI_IVAR_PRIVATE:
959 ad->ad_private = (void *)value;
961 case ACPI_IVAR_FLAGS:
962 ad->ad_flags = (int)value;
965 panic("bad ivar write request (%d)", index);
973 * Handle child resource allocation/removal
975 static struct resource_list *
976 acpi_get_rlist(device_t dev, device_t child)
978 struct acpi_device *ad;
980 ad = device_get_ivars(child);
985 * Pre-allocate/manage all memory and IO resources. Since rman can't handle
986 * duplicates, we merge any in the sysresource attach routine.
989 acpi_sysres_alloc(device_t dev)
991 struct resource *res;
992 struct resource_list *rl;
993 struct resource_list_entry *rle;
995 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL };
999 * Probe/attach any sysresource devices. This would be unnecessary if we
1000 * had multi-pass probe/attach.
1002 if (device_get_children(dev, &children, &child_count) != 0)
1004 for (i = 0; i < child_count; i++) {
1005 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL)
1006 device_probe_and_attach(children[i]);
1008 kfree(children, M_TEMP);
1010 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev);
1013 SLIST_FOREACH(rle, rl, link) {
1014 if (rle->res != NULL) {
1015 device_printf(dev, "duplicate resource for %lx\n", rle->start);
1019 /* Only memory and IO resources are valid here. */
1020 switch (rle->type) {
1021 case SYS_RES_IOPORT:
1024 case SYS_RES_MEMORY:
1025 rm = &acpi_rman_mem;
1031 /* Pre-allocate resource and add to our rman pool. */
1032 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type,
1033 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count,
1036 rman_manage_region(rm, rman_get_start(res), rman_get_end(res));
1039 device_printf(dev, "reservation of %lx, %lx (%d) failed\n",
1040 rle->start, rle->count, rle->type);
1045 static struct resource *
1046 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid,
1047 u_long start, u_long end, u_long count, u_int flags, int cpuid)
1050 struct acpi_device *ad = device_get_ivars(child);
1051 struct resource_list *rl = &ad->ad_rl;
1052 struct resource_list_entry *rle;
1053 struct resource *res;
1058 /* We only handle memory and IO resources through rman. */
1060 case SYS_RES_IOPORT:
1063 case SYS_RES_MEMORY:
1064 rm = &acpi_rman_mem;
1070 ACPI_SERIAL_BEGIN(acpi);
1073 * If this is an allocation of the "default" range for a given RID, and
1074 * we know what the resources for this device are (i.e., they're on the
1075 * child's resource list), use those start/end values.
1077 if (bus == device_get_parent(child) && start == 0UL && end == ~0UL) {
1078 rle = resource_list_find(rl, type, *rid);
1088 * If this is an allocation of a specific range, see if we can satisfy
1089 * the request from our system resource regions. If we can't, pass the
1090 * request up to the parent.
1092 if (start + count - 1 == end && rm != NULL)
1093 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE,
1096 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid,
1097 start, end, count, flags, cpuid);
1099 rman_set_rid(res, *rid);
1101 /* If requested, activate the resource using the parent's method. */
1102 if (flags & RF_ACTIVE)
1103 if (bus_activate_resource(child, type, *rid, res) != 0) {
1104 rman_release_resource(res);
1110 if (res != NULL && device_get_parent(child) == bus)
1114 * Since bus_config_intr() takes immediate effect, we cannot
1115 * configure the interrupt associated with a device when we
1116 * parse the resources but have to defer it until a driver
1117 * actually allocates the interrupt via bus_alloc_resource().
1119 * XXX: Should we handle the lookup failing?
1121 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares)))
1122 acpi_config_intr(child, &ares);
1124 kprintf("irq resource not found\n");
1129 ACPI_SERIAL_END(acpi);
1134 acpi_release_resource(device_t bus, device_t child, int type, int rid,
1140 /* We only handle memory and IO resources through rman. */
1142 case SYS_RES_IOPORT:
1145 case SYS_RES_MEMORY:
1146 rm = &acpi_rman_mem;
1152 ACPI_SERIAL_BEGIN(acpi);
1155 * If this resource belongs to one of our internal managers,
1156 * deactivate it and release it to the local pool. If it doesn't,
1157 * pass this request up to the parent.
1159 if (rm != NULL && rman_is_region_manager(r, rm)) {
1160 if (rman_get_flags(r) & RF_ACTIVE) {
1161 ret = bus_deactivate_resource(child, type, rid, r);
1165 ret = rman_release_resource(r);
1167 ret = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, type, rid, r);
1170 ACPI_SERIAL_END(acpi);
1175 acpi_delete_resource(device_t bus, device_t child, int type, int rid)
1177 struct resource_list *rl;
1179 rl = acpi_get_rlist(bus, child);
1180 resource_list_delete(rl, type, rid);
1183 /* Allocate an IO port or memory resource, given its GAS. */
1185 acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas,
1186 struct resource **res, u_int flags)
1188 int error, res_type;
1191 if (type == NULL || rid == NULL || gas == NULL || res == NULL)
1194 /* We only support memory and IO spaces. */
1195 switch (gas->SpaceId) {
1196 case ACPI_ADR_SPACE_SYSTEM_MEMORY:
1197 res_type = SYS_RES_MEMORY;
1199 case ACPI_ADR_SPACE_SYSTEM_IO:
1200 res_type = SYS_RES_IOPORT;
1203 return (EOPNOTSUPP);
1207 * If the register width is less than 8, assume the BIOS author means
1208 * it is a bit field and just allocate a byte.
1210 if (gas->BitWidth && gas->BitWidth < 8)
1213 /* Validate the address after we're sure we support the space. */
1214 if (gas->Address == 0 || gas->BitWidth == 0)
1217 bus_set_resource(dev, res_type, *rid, gas->Address,
1218 gas->BitWidth / 8, -1);
1219 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags);
1224 bus_delete_resource(dev, res_type, *rid);
1230 acpi_eval_osc(device_t dev, ACPI_HANDLE handle, const char *uuidstr,
1231 int revision, uint32_t *buf, int count)
1233 ACPI_BUFFER retbuf = { ACPI_ALLOCATE_BUFFER, NULL };
1234 ACPI_OBJECT_LIST arglist;
1236 ACPI_OBJECT *retobj;
1240 uint8_t oscuuid[16];
1243 if (parse_uuid(uuidstr, &uuid) != 0)
1245 le_uuid_enc(oscuuid, &uuid);
1247 arglist.Pointer = arg;
1249 arg[0].Type = ACPI_TYPE_BUFFER;
1250 arg[0].Buffer.Length = sizeof(oscuuid);
1251 arg[0].Buffer.Pointer = oscuuid; /* UUID */
1252 arg[1].Type = ACPI_TYPE_INTEGER;
1253 arg[1].Integer.Value = revision; /* revision */
1254 arg[2].Type = ACPI_TYPE_INTEGER;
1255 arg[2].Integer.Value = count; /* # of cap integers */
1256 arg[3].Type = ACPI_TYPE_BUFFER;
1257 arg[3].Buffer.Length = count * sizeof(uint32_t); /* capabilities buffer */
1258 arg[3].Buffer.Pointer = (uint8_t *)buf;
1260 status = AcpiEvaluateObject(handle, "_OSC", &arglist, &retbuf);
1261 if (ACPI_FAILURE(status)) {
1264 retobj = retbuf.Pointer;
1265 error = ((uint32_t *)retobj->Buffer.Pointer)[0] &
1266 ~ACPI_OSC_QUERY_SUPPORT;
1267 if (error & ACPI_OSCERR_OSCFAIL) {
1268 device_printf(dev, "_OSC unable to process request\n");
1271 if (error & ACPI_OSCERR_UUID) {
1272 device_printf(dev, "_OSC unrecognized UUID (%s)\n", uuidstr);
1275 if (error & ACPI_OSCERR_REVISION) {
1276 device_printf(dev, "_OSC unrecognized revision ID (%d)\n",
1280 if (error & ACPI_OSCERR_CAPSMASKED) {
1281 if (buf[0] & ACPI_OSC_QUERY_SUPPORT)
1283 for (i = 1; i < count; i++) {
1285 "_OSC capabilities have been masked: buf[%d]:%#x\n",
1286 i, buf[i] & ~((uint32_t *)retobj->Buffer.Pointer)[i]);
1288 status = AE_SUPPORT;
1293 AcpiOsFree(retbuf.Pointer);
1297 /* Probe _HID and _CID for compatible ISA PNP ids. */
1299 acpi_isa_get_logicalid(device_t dev)
1301 ACPI_DEVICE_INFO *devinfo;
1305 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1310 /* Fetch and validate the HID. */
1311 if ((h = acpi_get_handle(dev)) == NULL ||
1312 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
1315 if ((devinfo->Valid & ACPI_VALID_HID) != 0)
1316 pnpid = PNP_EISAID(devinfo->HardwareId.String);
1320 AcpiOsFree(devinfo);
1321 return_VALUE (pnpid);
1325 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count)
1327 ACPI_DEVICE_INFO *devinfo;
1332 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1338 /* Fetch and validate the CID */
1339 if ((h = acpi_get_handle(dev)) == NULL ||
1340 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)) ||
1341 (devinfo->Valid & ACPI_VALID_CID) == 0)
1344 if (devinfo->CompatibleIdList.Count < count)
1345 count = devinfo->CompatibleIdList.Count;
1346 for (i = 0; i < count; i++) {
1347 if (strncmp(devinfo->CompatibleIdList.Ids[i].String, "PNP", 3) != 0)
1349 *pnpid++ = PNP_EISAID(devinfo->CompatibleIdList.Ids[i].String);
1355 AcpiOsFree(devinfo);
1356 return_VALUE (valid);
1360 acpi_device_id_probe(device_t bus, device_t dev, char **ids)
1365 h = acpi_get_handle(dev);
1366 if (ids == NULL || h == NULL || acpi_get_type(dev) != ACPI_TYPE_DEVICE)
1369 /* Try to match one of the array of IDs with a HID or CID. */
1370 for (i = 0; ids[i] != NULL; i++) {
1371 if (acpi_MatchHid(h, ids[i]))
1378 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname,
1379 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret)
1384 h = ACPI_ROOT_OBJECT;
1385 else if ((h = acpi_get_handle(dev)) == NULL)
1386 return (AE_BAD_PARAMETER);
1387 return (AcpiEvaluateObject(h, pathname, parameters, ret));
1391 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate)
1393 struct acpi_softc *sc;
1399 sc = device_get_softc(bus);
1400 handle = acpi_get_handle(dev);
1403 * XXX If we find these devices, don't try to power them down.
1404 * The serial and IRDA ports on my T23 hang the system when
1405 * set to D3 and it appears that such legacy devices may
1406 * need special handling in their drivers.
1408 if (handle == NULL ||
1409 acpi_MatchHid(handle, "PNP0500") ||
1410 acpi_MatchHid(handle, "PNP0501") ||
1411 acpi_MatchHid(handle, "PNP0502") ||
1412 acpi_MatchHid(handle, "PNP0510") ||
1413 acpi_MatchHid(handle, "PNP0511"))
1417 * Override next state with the value from _SxD, if present. If no
1418 * dstate argument was provided, don't fetch the return value.
1420 ksnprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate);
1422 status = acpi_GetInteger(handle, sxd, dstate);
1424 status = AcpiEvaluateObject(handle, sxd, NULL, NULL);
1441 /* Callback arg for our implementation of walking the namespace. */
1442 struct acpi_device_scan_ctx {
1443 acpi_scan_cb_t user_fn;
1449 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval)
1451 struct acpi_device_scan_ctx *ctx;
1452 device_t dev, old_dev;
1454 ACPI_OBJECT_TYPE type;
1457 * Skip this device if we think we'll have trouble with it or it is
1458 * the parent where the scan began.
1460 ctx = (struct acpi_device_scan_ctx *)arg;
1461 if (acpi_avoid(h) || h == ctx->parent)
1464 /* If this is not a valid device type (e.g., a method), skip it. */
1465 if (ACPI_FAILURE(AcpiGetType(h, &type)))
1467 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR &&
1468 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER)
1472 * Call the user function with the current device. If it is unchanged
1473 * afterwards, return. Otherwise, we update the handle to the new dev.
1475 old_dev = acpi_get_device(h);
1477 status = ctx->user_fn(h, &dev, level, ctx->arg);
1478 if (ACPI_FAILURE(status) || old_dev == dev)
1481 /* Remove the old child and its connection to the handle. */
1482 if (old_dev != NULL) {
1483 device_delete_child(device_get_parent(old_dev), old_dev);
1484 AcpiDetachData(h, acpi_fake_objhandler);
1487 /* Recreate the handle association if the user created a device. */
1489 AcpiAttachData(h, acpi_fake_objhandler, dev);
1495 acpi_device_scan_children(device_t bus, device_t dev, int max_depth,
1496 acpi_scan_cb_t user_fn, void *arg)
1499 struct acpi_device_scan_ctx ctx;
1501 if (acpi_disabled("children"))
1505 h = ACPI_ROOT_OBJECT;
1506 else if ((h = acpi_get_handle(dev)) == NULL)
1507 return (AE_BAD_PARAMETER);
1508 ctx.user_fn = user_fn;
1511 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth,
1512 acpi_device_scan_cb, NULL, &ctx, NULL));
1516 * Even though ACPI devices are not PCI, we use the PCI approach for setting
1517 * device power states since it's close enough to ACPI.
1520 acpi_set_powerstate_method(device_t bus, device_t child, int state)
1527 h = acpi_get_handle(child);
1528 if (state < ACPI_STATE_D0 || state > ACPI_STATE_D3)
1533 /* Ignore errors if the power methods aren't present. */
1534 status = acpi_pwr_switch_consumer(h, state);
1535 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND
1536 && status != AE_BAD_PARAMETER)
1537 device_printf(bus, "failed to set ACPI power state D%d on %s: %s\n",
1538 state, acpi_name(h), AcpiFormatException(status));
1544 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids)
1546 int result, cid_count, i;
1547 uint32_t lid, cids[8];
1549 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1552 * ISA-style drivers attached to ACPI may persist and
1553 * probe manually if we return ENOENT. We never want
1554 * that to happen, so don't ever return it.
1558 /* Scan the supplied IDs for a match */
1559 lid = acpi_isa_get_logicalid(child);
1560 cid_count = acpi_isa_get_compatid(child, cids, 8);
1561 while (ids && ids->ip_id) {
1562 if (lid == ids->ip_id) {
1566 for (i = 0; i < cid_count; i++) {
1567 if (cids[i] == ids->ip_id) {
1576 if (result == 0 && ids->ip_desc)
1577 device_set_desc(child, ids->ip_desc);
1579 return_VALUE (result);
1583 * Look for a MCFG table. If it is present, use the settings for
1584 * domain (segment) 0 to setup PCI config space access via the memory
1588 acpi_enable_pcie(void)
1590 ACPI_TABLE_HEADER *hdr;
1591 ACPI_MCFG_ALLOCATION *alloc, *end;
1594 status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr);
1595 if (ACPI_FAILURE(status))
1598 end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length);
1599 alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1);
1600 while (alloc < end) {
1601 if (alloc->PciSegment == 0) {
1602 pcie_cfgregopen(alloc->Address, alloc->StartBusNumber,
1603 alloc->EndBusNumber);
1611 * Scan all of the ACPI namespace and attach child devices.
1613 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and
1614 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec.
1615 * However, in violation of the spec, some systems place their PCI link
1616 * devices in \, so we have to walk the whole namespace. We check the
1617 * type of namespace nodes, so this should be ok.
1620 acpi_probe_children(device_t bus)
1623 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1626 * Scan the namespace and insert placeholders for all the devices that
1627 * we find. We also probe/attach any early devices.
1629 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because
1630 * we want to create nodes for all devices, not just those that are
1631 * currently present. (This assumes that we don't want to create/remove
1632 * devices as they appear, which might be smarter.)
1634 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n"));
1635 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100,
1636 acpi_probe_child, NULL, bus, NULL);
1638 /* Pre-allocate resources for our rman from any sysresource devices. */
1639 acpi_sysres_alloc(bus);
1640 /* Create any static children by calling device identify methods. */
1641 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n"));
1642 bus_generic_probe(bus);
1644 /* Probe/attach all children, created staticly and from the namespace. */
1645 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n"));
1646 bus_generic_attach(bus);
1649 * Some of these children may have attached others as part of their attach
1650 * process (eg. the root PCI bus driver), so rescan.
1652 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n"));
1653 bus_generic_attach(bus);
1655 /* Attach wake sysctls. */
1656 acpi_wake_sysctl_walk(bus);
1658 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n"));
1663 * Determine the probe order for a given device.
1666 acpi_probe_order(ACPI_HANDLE handle, int *order)
1668 ACPI_OBJECT_TYPE type;
1671 * 1. I/O port and memory system resource holders
1672 * 2. Embedded controllers (to handle early accesses)
1673 * 3. PCI Link Devices
1676 AcpiGetType(handle, &type);
1677 if (acpi_MatchHid(handle, "PNP0C01") || acpi_MatchHid(handle, "PNP0C02"))
1679 else if (acpi_MatchHid(handle, "PNP0C09"))
1681 else if (acpi_MatchHid(handle, "PNP0C0F"))
1683 else if (type == ACPI_TYPE_PROCESSOR)
1688 * Evaluate a child device and determine whether we might attach a device to
1692 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status)
1694 struct acpi_prw_data prw;
1695 ACPI_OBJECT_TYPE type;
1697 device_t bus, child;
1701 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1703 if (acpi_disabled("children"))
1704 return_ACPI_STATUS (AE_OK);
1706 /* Skip this device if we think we'll have trouble with it. */
1707 if (acpi_avoid(handle))
1708 return_ACPI_STATUS (AE_OK);
1710 bus = (device_t)context;
1711 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) {
1712 handle_str = acpi_name(handle);
1714 case ACPI_TYPE_DEVICE:
1716 * Since we scan from \, be sure to skip system scope objects.
1717 * \_SB_ and \_TZ_ are defined in ACPICA as devices to work around
1718 * BIOS bugs. For example, \_SB_ is to allow \_SB_._INI to be run
1719 * during the intialization and \_TZ_ is to support Notify() on it.
1721 if (strcmp(handle_str, "\\_SB_") == 0 ||
1722 strcmp(handle_str, "\\_TZ_") == 0)
1725 if (acpi_parse_prw(handle, &prw) == 0)
1726 AcpiSetupGpeForWake(handle, prw.gpe_handle, prw.gpe_bit);
1729 case ACPI_TYPE_PROCESSOR:
1730 case ACPI_TYPE_THERMAL:
1731 case ACPI_TYPE_POWER:
1733 * Create a placeholder device for this node. Sort the
1734 * placeholder so that the probe/attach passes will run
1735 * breadth-first. Orders less than ACPI_DEV_BASE_ORDER
1736 * are reserved for special objects (i.e., system
1737 * resources). CPU devices have a very high order to
1738 * ensure they are probed after other devices.
1740 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str));
1741 order = level * 10 + 100;
1742 acpi_probe_order(handle, &order);
1743 child = BUS_ADD_CHILD(bus, bus, order, NULL, -1);
1747 /* Associate the handle with the device_t and vice versa. */
1748 acpi_set_handle(child, handle);
1749 AcpiAttachData(handle, acpi_fake_objhandler, child);
1752 * Check that the device is present. If it's not present,
1753 * leave it disabled (so that we have a device_t attached to
1754 * the handle, but we don't probe it).
1756 * XXX PCI link devices sometimes report "present" but not
1757 * "functional" (i.e. if disabled). Go ahead and probe them
1758 * anyway since we may enable them later.
1760 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) {
1761 /* Never disable PCI link devices. */
1762 if (acpi_MatchHid(handle, "PNP0C0F"))
1765 * Docking stations should remain enabled since the system
1766 * may be undocked at boot.
1768 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h)))
1771 device_disable(child);
1776 * Get the device's resource settings and attach them.
1777 * Note that if the device has _PRS but no _CRS, we need
1778 * to decide when it's appropriate to try to configure the
1779 * device. Ignore the return value here; it's OK for the
1780 * device not to have any resources.
1782 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL);
1787 return_ACPI_STATUS (AE_OK);
1791 * AcpiAttachData() requires an object handler but never uses it. This is a
1792 * placeholder object handler so we can store a device_t in an ACPI_HANDLE.
1795 acpi_fake_objhandler(ACPI_HANDLE h, void *data)
1800 acpi_shutdown_final(void *arg, int howto)
1802 struct acpi_softc *sc;
1806 * XXX Shutdown code should only run on the BSP (cpuid 0).
1807 * Some chipsets do not power off the system correctly if called from
1811 if ((howto & RB_POWEROFF) != 0) {
1812 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5);
1813 if (ACPI_FAILURE(status)) {
1814 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n",
1815 AcpiFormatException(status));
1818 device_printf(sc->acpi_dev, "Powering system off\n");
1819 ACPI_DISABLE_IRQS();
1820 status = AcpiEnterSleepState(ACPI_STATE_S5);
1821 if (ACPI_FAILURE(status)) {
1822 device_printf(sc->acpi_dev, "power-off failed - %s\n",
1823 AcpiFormatException(status));
1826 device_printf(sc->acpi_dev, "power-off failed - timeout\n");
1828 } else if ((howto & RB_HALT) == 0 && sc->acpi_handle_reboot) {
1829 /* Reboot using the reset register. */
1830 status = AcpiReset();
1831 if (ACPI_FAILURE(status)) {
1832 if (status != AE_NOT_EXIST)
1833 device_printf(sc->acpi_dev, "reset failed - %s\n",
1834 AcpiFormatException(status));
1837 device_printf(sc->acpi_dev, "reset failed - timeout\n");
1839 } else if (sc->acpi_do_disable && panicstr == NULL) {
1841 * Only disable ACPI if the user requested. On some systems, writing
1842 * the disable value to SMI_CMD hangs the system.
1844 device_printf(sc->acpi_dev, "Shutting down\n");
1850 acpi_enable_fixed_events(struct acpi_softc *sc)
1852 static int first_time = 1;
1854 /* Enable and clear fixed events and install handlers. */
1855 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) {
1856 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON);
1857 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON,
1858 acpi_event_power_button_sleep, sc);
1860 device_printf(sc->acpi_dev, "Power Button (fixed)\n");
1862 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) {
1863 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON);
1864 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON,
1865 acpi_event_sleep_button_sleep, sc);
1867 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n");
1874 * Returns true if the device is actually present and should
1875 * be attached to. This requires the present, enabled, UI-visible
1876 * and diagnostics-passed bits to be set.
1879 acpi_DeviceIsPresent(device_t dev)
1881 ACPI_DEVICE_INFO *devinfo;
1886 if ((h = acpi_get_handle(dev)) == NULL ||
1887 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
1890 /* If no _STA method, must be present */
1891 if ((devinfo->Valid & ACPI_VALID_STA) == 0)
1894 /* Return true for 'present' and 'functioning' */
1895 if (ACPI_DEVICE_PRESENT(devinfo->CurrentStatus))
1898 AcpiOsFree(devinfo);
1903 * Returns true if the battery is actually present and inserted.
1906 acpi_BatteryIsPresent(device_t dev)
1908 ACPI_DEVICE_INFO *devinfo;
1913 if ((h = acpi_get_handle(dev)) == NULL ||
1914 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
1917 /* If no _STA method, must be present */
1918 if ((devinfo->Valid & ACPI_VALID_STA) == 0)
1921 /* Return true for 'present', 'battery present', and 'functioning' */
1922 if (ACPI_BATTERY_PRESENT(devinfo->CurrentStatus))
1925 AcpiOsFree(devinfo);
1930 * Match a HID string against a handle
1933 acpi_MatchHid(ACPI_HANDLE h, const char *hid)
1935 ACPI_DEVICE_INFO *devinfo;
1939 if (hid == NULL || h == NULL ||
1940 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
1943 if ((devinfo->Valid & ACPI_VALID_HID) != 0 &&
1944 strcmp(hid, devinfo->HardwareId.String) == 0)
1946 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) {
1947 for (i = 0; i < devinfo->CompatibleIdList.Count; i++) {
1948 if (strcmp(hid, devinfo->CompatibleIdList.Ids[i].String) == 0) {
1955 AcpiOsFree(devinfo);
1960 * Return the handle of a named object within our scope, ie. that of (parent)
1961 * or one if its parents.
1964 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result)
1969 /* Walk back up the tree to the root */
1971 status = AcpiGetHandle(parent, path, &r);
1972 if (ACPI_SUCCESS(status)) {
1976 /* XXX Return error here? */
1977 if (status != AE_NOT_FOUND)
1979 if (ACPI_FAILURE(AcpiGetParent(parent, &r)))
1980 return (AE_NOT_FOUND);
1986 * Allocate a buffer with a preset data size.
1989 acpi_AllocBuffer(int size)
1993 if ((buf = kmalloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL)
1996 buf->Pointer = (void *)(buf + 1);
2001 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number)
2004 ACPI_OBJECT_LIST args;
2006 arg1.Type = ACPI_TYPE_INTEGER;
2007 arg1.Integer.Value = number;
2009 args.Pointer = &arg1;
2011 return (AcpiEvaluateObject(handle, path, &args, NULL));
2015 * Evaluate a path that should return an integer.
2018 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number)
2025 handle = ACPI_ROOT_OBJECT;
2028 * Assume that what we've been pointed at is an Integer object, or
2029 * a method that will return an Integer.
2031 buf.Pointer = ¶m;
2032 buf.Length = sizeof(param);
2033 status = AcpiEvaluateObject(handle, path, NULL, &buf);
2034 if (ACPI_SUCCESS(status)) {
2035 if (param.Type == ACPI_TYPE_INTEGER)
2036 *number = param.Integer.Value;
2042 * In some applications, a method that's expected to return an Integer
2043 * may instead return a Buffer (probably to simplify some internal
2044 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer,
2045 * convert it into an Integer as best we can.
2049 if (status == AE_BUFFER_OVERFLOW) {
2050 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) {
2051 status = AE_NO_MEMORY;
2053 status = AcpiEvaluateObject(handle, path, NULL, &buf);
2054 if (ACPI_SUCCESS(status))
2055 status = acpi_ConvertBufferToInteger(&buf, number);
2056 AcpiOsFree(buf.Pointer);
2063 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number)
2069 p = (ACPI_OBJECT *)bufp->Pointer;
2070 if (p->Type == ACPI_TYPE_INTEGER) {
2071 *number = p->Integer.Value;
2074 if (p->Type != ACPI_TYPE_BUFFER)
2076 if (p->Buffer.Length > sizeof(int))
2077 return (AE_BAD_DATA);
2080 val = p->Buffer.Pointer;
2081 for (i = 0; i < p->Buffer.Length; i++)
2082 *number += val[i] << (i * 8);
2087 * Iterate over the elements of an a package object, calling the supplied
2088 * function for each element.
2090 * XXX possible enhancement might be to abort traversal on error.
2093 acpi_ForeachPackageObject(ACPI_OBJECT *pkg,
2094 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg)
2099 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE)
2100 return (AE_BAD_PARAMETER);
2102 /* Iterate over components */
2104 comp = pkg->Package.Elements;
2105 for (; i < pkg->Package.Count; i++, comp++)
2112 * Find the (index)th resource object in a set.
2115 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp)
2120 rp = (ACPI_RESOURCE *)buf->Pointer;
2124 if (rp > (ACPI_RESOURCE *)((uint8_t *)buf->Pointer + buf->Length))
2125 return (AE_BAD_PARAMETER);
2127 /* Check for terminator */
2128 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0)
2129 return (AE_NOT_FOUND);
2130 rp = ACPI_NEXT_RESOURCE(rp);
2139 * Append an ACPI_RESOURCE to an ACPI_BUFFER.
2141 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER
2142 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible
2143 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of
2146 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512
2149 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res)
2154 /* Initialise the buffer if necessary. */
2155 if (buf->Pointer == NULL) {
2156 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE;
2157 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL)
2158 return (AE_NO_MEMORY);
2159 rp = (ACPI_RESOURCE *)buf->Pointer;
2160 rp->Type = ACPI_RESOURCE_TYPE_END_TAG;
2161 rp->Length = ACPI_RS_SIZE_MIN;
2167 * Scan the current buffer looking for the terminator.
2168 * This will either find the terminator or hit the end
2169 * of the buffer and return an error.
2171 rp = (ACPI_RESOURCE *)buf->Pointer;
2173 /* Range check, don't go outside the buffer */
2174 if (rp >= (ACPI_RESOURCE *)((uint8_t *)buf->Pointer + buf->Length))
2175 return (AE_BAD_PARAMETER);
2176 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0)
2178 rp = ACPI_NEXT_RESOURCE(rp);
2182 * Check the size of the buffer and expand if required.
2185 * size of existing resources before terminator +
2186 * size of new resource and header +
2187 * size of terminator.
2189 * Note that this loop should really only run once, unless
2190 * for some reason we are stuffing a *really* huge resource.
2192 while ((((uint8_t *)rp - (uint8_t *)buf->Pointer) +
2193 res->Length + ACPI_RS_SIZE_NO_DATA +
2194 ACPI_RS_SIZE_MIN) >= buf->Length) {
2195 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL)
2196 return (AE_NO_MEMORY);
2197 bcopy(buf->Pointer, newp, buf->Length);
2198 rp = (ACPI_RESOURCE *)((uint8_t *)newp +
2199 ((uint8_t *)rp - (uint8_t *)buf->Pointer));
2200 AcpiOsFree(buf->Pointer);
2201 buf->Pointer = newp;
2202 buf->Length += buf->Length;
2205 /* Insert the new resource. */
2206 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA);
2208 /* And add the terminator. */
2209 rp = ACPI_NEXT_RESOURCE(rp);
2210 rp->Type = ACPI_RESOURCE_TYPE_END_TAG;
2211 rp->Length = ACPI_RS_SIZE_MIN;
2217 * Set interrupt model.
2220 acpi_SetIntrModel(int model)
2223 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model));
2227 * DEPRECATED. This interface has serious deficiencies and will be
2230 * Immediately enter the sleep state. In the old model, acpiconf(8) ran
2231 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this.
2234 acpi_SetSleepState(struct acpi_softc *sc, int state)
2239 device_printf(sc->acpi_dev,
2240 "warning: acpi_SetSleepState() deprecated, need to update your software\n");
2243 return (acpi_EnterSleepState(sc, state));
2247 acpi_sleep_force(void *arg)
2249 struct acpi_softc *sc;
2252 device_printf(sc->acpi_dev,
2253 "suspend request timed out, forcing sleep now\n");
2254 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate)))
2255 device_printf(sc->acpi_dev, "force sleep state S%d failed\n",
2256 sc->acpi_next_sstate);
2260 * Request that the system enter the given suspend state. All /dev/apm
2261 * devices and devd(8) will be notified. Userland then has a chance to
2262 * save state and acknowledge the request. The system sleeps once all
2266 acpi_ReqSleepState(struct acpi_softc *sc, int state)
2269 struct apm_clone_data *clone;
2272 if (state < ACPI_STATE_S1 || state > ACPI_STATE_S5)
2275 /* S5 (soft-off) should be entered directly with no waiting. */
2276 if (state == ACPI_STATE_S5) {
2277 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, state)))
2283 #if !defined(__i386__)
2284 /* This platform does not support acpi suspend/resume. */
2285 return (EOPNOTSUPP);
2288 /* If a suspend request is already in progress, just return. */
2290 if (sc->acpi_next_sstate != 0) {
2295 /* Record the pending state and notify all apm devices. */
2296 sc->acpi_next_sstate = state;
2298 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) {
2299 clone->notify_status = APM_EV_NONE;
2300 if ((clone->flags & ACPI_EVF_DEVD) == 0) {
2301 KNOTE(&clone->sel_read.si_note, 0);
2306 /* If devd(8) is not running, immediately enter the sleep state. */
2307 if (devctl_process_running() == FALSE) {
2309 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) {
2316 /* Now notify devd(8) also. */
2317 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state);
2320 * Set a timeout to fire if userland doesn't ack the suspend request
2321 * in time. This way we still eventually go to sleep if we were
2322 * overheating or running low on battery, even if userland is hung.
2323 * We cancel this timeout once all userland acks are in or the
2324 * suspend request is aborted.
2326 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc);
2332 * Acknowledge (or reject) a pending sleep state. The caller has
2333 * prepared for suspend and is now ready for it to proceed. If the
2334 * error argument is non-zero, it indicates suspend should be cancelled
2335 * and gives an errno value describing why. Once all votes are in,
2336 * we suspend the system.
2339 acpi_AckSleepState(struct apm_clone_data *clone, int error)
2341 struct acpi_softc *sc;
2344 #if !defined(__i386__)
2345 /* This platform does not support acpi suspend/resume. */
2346 return (EOPNOTSUPP);
2349 /* If no pending sleep state, return an error. */
2351 sc = clone->acpi_sc;
2352 if (sc->acpi_next_sstate == 0) {
2357 /* Caller wants to abort suspend process. */
2359 sc->acpi_next_sstate = 0;
2360 callout_stop(&sc->susp_force_to);
2361 device_printf(sc->acpi_dev,
2362 "listener on %s cancelled the pending suspend\n",
2363 devtoname(clone->cdev));
2369 * Mark this device as acking the suspend request. Then, walk through
2370 * all devices, seeing if they agree yet. We only count devices that
2371 * are writable since read-only devices couldn't ack the request.
2373 clone->notify_status = APM_EV_ACKED;
2375 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) {
2376 if ((clone->flags & ACPI_EVF_WRITE) != 0 &&
2377 clone->notify_status != APM_EV_ACKED) {
2383 /* If all devices have voted "yes", we will suspend now. */
2385 callout_stop(&sc->susp_force_to);
2389 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate)))
2397 acpi_sleep_enable(void *arg)
2399 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0;
2402 enum acpi_sleep_state {
2405 ACPI_SS_DEV_SUSPEND,
2411 * Enter the desired system sleep state.
2413 * Currently we support S1-S5 but S4 is only S4BIOS
2416 acpi_EnterSleepState(struct acpi_softc *sc, int state)
2421 enum acpi_sleep_state slp_state;
2423 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
2425 /* Re-entry once we're suspending is not allowed. */
2428 if (sc->acpi_sleep_disabled) {
2430 device_printf(sc->acpi_dev,
2431 "suspend request ignored (not ready yet)\n");
2434 sc->acpi_sleep_disabled = 1;
2438 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE
2439 * drivers need this.
2442 slp_state = ACPI_SS_NONE;
2448 status = AcpiGetSleepTypeData(state, &TypeA, &TypeB);
2449 if (status == AE_NOT_FOUND) {
2450 device_printf(sc->acpi_dev,
2451 "Sleep state S%d not supported by BIOS\n", state);
2453 } else if (ACPI_FAILURE(status)) {
2454 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n",
2455 AcpiFormatException(status));
2459 sc->acpi_sstate = state;
2461 /* Enable any GPEs as appropriate and requested by the user. */
2462 acpi_wake_prep_walk(state);
2463 slp_state = ACPI_SS_GPE_SET;
2466 * Inform all devices that we are going to sleep. If at least one
2467 * device fails, DEVICE_SUSPEND() automatically resumes the tree.
2469 * XXX Note that a better two-pass approach with a 'veto' pass
2470 * followed by a "real thing" pass would be better, but the current
2471 * bus interface does not provide for this.
2473 if (DEVICE_SUSPEND(root_bus) != 0) {
2474 device_printf(sc->acpi_dev, "device_suspend failed\n");
2477 slp_state = ACPI_SS_DEV_SUSPEND;
2479 /* If testing device suspend only, back out of everything here. */
2480 if (acpi_susp_bounce)
2483 status = AcpiEnterSleepStatePrep(state);
2484 if (ACPI_FAILURE(status)) {
2485 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n",
2486 AcpiFormatException(status));
2489 slp_state = ACPI_SS_SLP_PREP;
2491 if (sc->acpi_sleep_delay > 0)
2492 DELAY(sc->acpi_sleep_delay * 1000000);
2494 if (state != ACPI_STATE_S1) {
2495 acpi_sleep_machdep(sc, state);
2497 /* Re-enable ACPI hardware on wakeup from sleep state 4. */
2498 if (state == ACPI_STATE_S4)
2501 ACPI_DISABLE_IRQS();
2502 status = AcpiEnterSleepState(state);
2503 if (ACPI_FAILURE(status)) {
2504 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n",
2505 AcpiFormatException(status));
2509 slp_state = ACPI_SS_SLEPT;
2513 * Shut down cleanly and power off. This will call us back through the
2514 * shutdown handlers.
2516 shutdown_nice(RB_POWEROFF);
2520 status = AE_BAD_PARAMETER;
2525 * Back out state according to how far along we got in the suspend
2526 * process. This handles both the error and success cases.
2528 sc->acpi_next_sstate = 0;
2529 if (slp_state >= ACPI_SS_GPE_SET) {
2530 acpi_wake_prep_walk(state);
2531 sc->acpi_sstate = ACPI_STATE_S0;
2533 if (slp_state >= ACPI_SS_SLP_PREP)
2534 AcpiLeaveSleepState(state);
2535 if (slp_state >= ACPI_SS_DEV_SUSPEND)
2536 DEVICE_RESUME(root_bus);
2537 if (slp_state >= ACPI_SS_SLEPT)
2538 acpi_enable_fixed_events(sc);
2540 /* Allow another sleep request after a while. */
2541 /* XXX: needs timeout */
2542 if (state != ACPI_STATE_S5)
2543 acpi_sleep_enable(sc);
2545 /* Run /etc/rc.resume after we are back. */
2546 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state);
2549 return_ACPI_STATUS (status);
2552 /* Enable or disable the device's GPE. */
2554 acpi_wake_set_enable(device_t dev, int enable)
2556 struct acpi_prw_data prw;
2560 /* Make sure the device supports waking the system and get the GPE. */
2561 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0)
2564 flags = acpi_get_flags(dev);
2566 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit,
2568 if (ACPI_FAILURE(status)) {
2569 device_printf(dev, "enable wake failed\n");
2572 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED);
2574 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit,
2576 if (ACPI_FAILURE(status)) {
2577 device_printf(dev, "disable wake failed\n");
2580 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED);
2587 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate)
2589 struct acpi_prw_data prw;
2592 /* Check that this is a wake-capable device and get its GPE. */
2593 if (acpi_parse_prw(handle, &prw) != 0)
2595 dev = acpi_get_device(handle);
2598 * The destination sleep state must be less than (i.e., higher power)
2599 * or equal to the value specified by _PRW. If this GPE cannot be
2600 * enabled for the next sleep state, then disable it. If it can and
2601 * the user requested it be enabled, turn on any required power resources
2604 if (sstate > prw.lowest_wake) {
2605 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_DISABLE);
2607 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n",
2608 acpi_name(handle), sstate);
2609 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) {
2610 acpi_pwr_wake_enable(handle, 1);
2611 acpi_SetInteger(handle, "_PSW", 1);
2613 device_printf(dev, "wake_prep enabled for %s (S%d)\n",
2614 acpi_name(handle), sstate);
2621 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate)
2623 struct acpi_prw_data prw;
2627 * Check that this is a wake-capable device and get its GPE. Return
2628 * now if the user didn't enable this device for wake.
2630 if (acpi_parse_prw(handle, &prw) != 0)
2632 dev = acpi_get_device(handle);
2633 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0)
2637 * If this GPE couldn't be enabled for the previous sleep state, it was
2638 * disabled before going to sleep so re-enable it. If it was enabled,
2639 * clear _PSW and turn off any power resources it used.
2641 if (sstate > prw.lowest_wake) {
2642 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_ENABLE);
2644 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle));
2646 acpi_SetInteger(handle, "_PSW", 0);
2647 acpi_pwr_wake_enable(handle, 0);
2649 device_printf(dev, "run_prep cleaned up for %s\n",
2657 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status)
2661 /* If suspending, run the sleep prep function, otherwise wake. */
2662 sstate = *(int *)context;
2663 if (AcpiGbl_SystemAwakeAndRunning)
2664 acpi_wake_sleep_prep(handle, sstate);
2666 acpi_wake_run_prep(handle, sstate);
2670 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */
2672 acpi_wake_prep_walk(int sstate)
2674 ACPI_HANDLE sb_handle;
2676 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) {
2677 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100,
2678 acpi_wake_prep, NULL, &sstate, NULL);
2683 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */
2685 acpi_wake_sysctl_walk(device_t dev)
2688 int error, i, numdevs;
2693 error = device_get_children(dev, &devlist, &numdevs);
2694 if (error != 0 || numdevs == 0) {
2696 kfree(devlist, M_TEMP);
2699 for (i = 0; i < numdevs; i++) {
2701 acpi_wake_sysctl_walk(child);
2702 if (!device_is_attached(child))
2704 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL);
2705 if (ACPI_SUCCESS(status)) {
2706 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child),
2707 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO,
2708 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0,
2709 acpi_wake_set_sysctl, "I", "Device set to wake the system");
2712 kfree(devlist, M_TEMP);
2719 /* Enable or disable wake from userland. */
2721 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS)
2726 dev = (device_t)arg1;
2727 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0;
2729 error = sysctl_handle_int(oidp, &enable, 0, req);
2730 if (error != 0 || req->newptr == NULL)
2732 if (enable != 0 && enable != 1)
2735 return (acpi_wake_set_enable(dev, enable));
2739 /* Parse a device's _PRW into a structure. */
2741 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw)
2744 ACPI_BUFFER prw_buffer;
2745 ACPI_OBJECT *res, *res2;
2746 int error, i, power_count;
2748 if (h == NULL || prw == NULL)
2752 * The _PRW object (7.2.9) is only required for devices that have the
2753 * ability to wake the system from a sleeping state.
2756 prw_buffer.Pointer = NULL;
2757 prw_buffer.Length = ACPI_ALLOCATE_BUFFER;
2758 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer);
2759 if (ACPI_FAILURE(status))
2761 res = (ACPI_OBJECT *)prw_buffer.Pointer;
2764 if (!ACPI_PKG_VALID(res, 2))
2768 * Element 1 of the _PRW object:
2769 * The lowest power system sleeping state that can be entered while still
2770 * providing wake functionality. The sleeping state being entered must
2771 * be less than (i.e., higher power) or equal to this value.
2773 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0)
2777 * Element 0 of the _PRW object:
2779 switch (res->Package.Elements[0].Type) {
2780 case ACPI_TYPE_INTEGER:
2782 * If the data type of this package element is numeric, then this
2783 * _PRW package element is the bit index in the GPEx_EN, in the
2784 * GPE blocks described in the FADT, of the enable bit that is
2785 * enabled for the wake event.
2787 prw->gpe_handle = NULL;
2788 prw->gpe_bit = res->Package.Elements[0].Integer.Value;
2791 case ACPI_TYPE_PACKAGE:
2793 * If the data type of this package element is a package, then this
2794 * _PRW package element is itself a package containing two
2795 * elements. The first is an object reference to the GPE Block
2796 * device that contains the GPE that will be triggered by the wake
2797 * event. The second element is numeric and it contains the bit
2798 * index in the GPEx_EN, in the GPE Block referenced by the
2799 * first element in the package, of the enable bit that is enabled for
2802 * For example, if this field is a package then it is of the form:
2803 * Package() {\_SB.PCI0.ISA.GPE, 2}
2805 res2 = &res->Package.Elements[0];
2806 if (!ACPI_PKG_VALID(res2, 2))
2808 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]);
2809 if (prw->gpe_handle == NULL)
2811 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0)
2819 /* Elements 2 to N of the _PRW object are power resources. */
2820 power_count = res->Package.Count - 2;
2821 if (power_count > ACPI_PRW_MAX_POWERRES) {
2822 kprintf("ACPI device %s has too many power resources\n", acpi_name(h));
2825 prw->power_res_count = power_count;
2826 for (i = 0; i < power_count; i++)
2827 prw->power_res[i] = res->Package.Elements[i];
2830 if (prw_buffer.Pointer != NULL)
2831 AcpiOsFree(prw_buffer.Pointer);
2836 * ACPI Event Handlers
2839 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */
2842 acpi_system_eventhandler_sleep(void *arg, int state)
2844 struct acpi_softc *sc;
2847 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
2851 /* Check if button action is disabled. */
2852 if (state == ACPI_S_STATES_MAX + 1)
2855 /* Request that the system prepare to enter the given suspend state. */
2856 ret = acpi_ReqSleepState((struct acpi_softc *)arg, state);
2858 device_printf(sc->acpi_dev,
2859 "request to enter state S%d failed (err %d)\n", state, ret);
2865 acpi_system_eventhandler_wakeup(void *arg, int state)
2868 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
2870 /* Currently, nothing to do for wakeup. */
2876 * ACPICA Event Handlers (FixedEvent, also called from button notify handler)
2879 acpi_event_power_button_sleep(void *context)
2881 struct acpi_softc *sc = (struct acpi_softc *)context;
2883 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
2885 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx);
2887 return_VALUE (ACPI_INTERRUPT_HANDLED);
2891 acpi_event_power_button_wake(void *context)
2893 struct acpi_softc *sc = (struct acpi_softc *)context;
2895 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
2897 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx);
2899 return_VALUE (ACPI_INTERRUPT_HANDLED);
2903 acpi_event_sleep_button_sleep(void *context)
2905 struct acpi_softc *sc = (struct acpi_softc *)context;
2907 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
2909 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx);
2911 return_VALUE (ACPI_INTERRUPT_HANDLED);
2915 acpi_event_sleep_button_wake(void *context)
2917 struct acpi_softc *sc = (struct acpi_softc *)context;
2919 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
2921 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx);
2923 return_VALUE (ACPI_INTERRUPT_HANDLED);
2927 * XXX This static buffer is suboptimal. There is no locking so only
2928 * use this for single-threaded callers.
2931 acpi_name(ACPI_HANDLE handle)
2934 static char data[256];
2936 buf.Length = sizeof(data);
2939 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf)))
2941 return ("(unknown)");
2945 * Debugging/bug-avoidance. Avoid trying to fetch info on various
2946 * parts of the namespace.
2949 acpi_avoid(ACPI_HANDLE handle)
2951 char *cp, *env, *np;
2954 np = acpi_name(handle);
2957 if ((env = kgetenv("debug.acpi.avoid")) == NULL)
2960 /* Scan the avoid list checking for a match */
2963 while (*cp != 0 && isspace(*cp))
2968 while (cp[len] != 0 && !isspace(cp[len]))
2970 if (!strncmp(cp, np, len)) {
2982 * Debugging/bug-avoidance. Disable ACPI subsystem components.
2985 acpi_disabled(char *subsys)
2990 if ((env = kgetenv("debug.acpi.disabled")) == NULL)
2992 if (strcmp(env, "all") == 0) {
2997 /* Scan the disable list, checking for a match. */
3000 while (*cp != '\0' && isspace(*cp))
3005 while (cp[len] != '\0' && !isspace(cp[len]))
3007 if (strncmp(cp, subsys, len) == 0) {
3019 * Debugging/bug-avoidance. Enable ACPI subsystem components. Most
3020 * components are enabled by default. The ones that are not have to be
3021 * enabled via debug.acpi.enabled.
3024 acpi_enabled(char *subsys)
3029 if ((env = kgetenv("debug.acpi.enabled")) == NULL)
3031 if (strcmp(env, "all") == 0) {
3036 /* Scan the enable list, checking for a match. */
3039 while (*cp != '\0' && isspace(*cp))
3044 while (cp[len] != '\0' && !isspace(cp[len]))
3046 if (strncmp(cp, subsys, len) == 0) {
3058 * Control interface.
3060 * We multiplex ioctls for all participating ACPI devices here. Individual
3061 * drivers wanting to be accessible via /dev/acpi should use the
3062 * register/deregister interface to make their handlers visible.
3064 struct acpi_ioctl_hook
3066 TAILQ_ENTRY(acpi_ioctl_hook) link;
3072 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks;
3073 static int acpi_ioctl_hooks_initted;
3076 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg)
3078 struct acpi_ioctl_hook *hp;
3080 if ((hp = kmalloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL)
3087 if (acpi_ioctl_hooks_initted == 0) {
3088 TAILQ_INIT(&acpi_ioctl_hooks);
3089 acpi_ioctl_hooks_initted = 1;
3091 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link);
3098 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn)
3100 struct acpi_ioctl_hook *hp;
3103 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link)
3104 if (hp->cmd == cmd && hp->fn == fn)
3108 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link);
3109 kfree(hp, M_ACPIDEV);
3115 acpiopen(struct dev_open_args *ap)
3121 acpiclose(struct dev_close_args *ap)
3127 acpiioctl(struct dev_ioctl_args *ap)
3129 struct acpi_softc *sc;
3130 struct acpi_ioctl_hook *hp;
3135 sc = ap->a_head.a_dev->si_drv1;
3138 * Scan the list of registered ioctls, looking for handlers.
3141 if (acpi_ioctl_hooks_initted)
3142 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) {
3143 if (hp->cmd == ap->a_cmd)
3148 return (hp->fn(ap->a_cmd, ap->a_data, hp->arg));
3151 * Core ioctls are not permitted for non-writable user.
3152 * Currently, other ioctls just fetch information.
3153 * Not changing system behavior.
3155 if ((ap->a_fflag & FWRITE) == 0)
3158 /* Core system ioctls. */
3159 switch (ap->a_cmd) {
3160 case ACPIIO_REQSLPSTATE:
3161 state = *(int *)ap->a_data;
3162 if (state != ACPI_STATE_S5)
3163 error = acpi_ReqSleepState(sc, state);
3165 device_printf(sc->acpi_dev,
3166 "power off via acpi ioctl not supported\n");
3170 case ACPIIO_ACKSLPSTATE:
3173 error = *(int *)ap->a_data;
3174 error = acpi_AckSleepState(sc->acpi_clone, error);
3177 case ACPIIO_SETSLPSTATE: /* DEPRECATED */
3179 state = *(int *)ap->a_data;
3180 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX)
3181 if (ACPI_SUCCESS(acpi_SetSleepState(sc, state)))
3192 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
3196 UINT8 state, TypeA, TypeB;
3198 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND);
3199 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX + 1; state++)
3200 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB)))
3201 sbuf_printf(&sb, "S%d ", state);
3204 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req);
3210 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
3212 char sleep_state[10];
3214 u_int new_state, old_state;
3216 old_state = *(u_int *)oidp->oid_arg1;
3217 if (old_state > ACPI_S_STATES_MAX + 1)
3218 strlcpy(sleep_state, "unknown", sizeof(sleep_state));
3220 strlcpy(sleep_state, sleep_state_names[old_state], sizeof(sleep_state));
3221 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req);
3222 if (error == 0 && req->newptr != NULL) {
3223 new_state = ACPI_STATE_S0;
3224 for (; new_state <= ACPI_S_STATES_MAX + 1; new_state++)
3225 if (strcmp(sleep_state, sleep_state_names[new_state]) == 0)
3227 if (new_state <= ACPI_S_STATES_MAX + 1) {
3228 if (new_state != old_state)
3229 *(u_int *)oidp->oid_arg1 = new_state;
3237 /* Inform devctl(4) when we receive a Notify. */
3239 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify)
3241 char notify_buf[16];
3242 ACPI_BUFFER handle_buf;
3245 if (subsystem == NULL)
3248 handle_buf.Pointer = NULL;
3249 handle_buf.Length = ACPI_ALLOCATE_BUFFER;
3250 status = AcpiNsHandleToPathname(h, &handle_buf);
3251 if (ACPI_FAILURE(status))
3253 ksnprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify);
3254 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf);
3255 AcpiOsFree(handle_buf.Pointer);
3260 * Support for parsing debug options from the kernel environment.
3262 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers
3263 * by specifying the names of the bits in the debug.acpi.layer and
3264 * debug.acpi.level environment variables. Bits may be unset by
3265 * prefixing the bit name with !.
3273 static struct debugtag dbg_layer[] = {
3274 {"ACPI_UTILITIES", ACPI_UTILITIES},
3275 {"ACPI_HARDWARE", ACPI_HARDWARE},
3276 {"ACPI_EVENTS", ACPI_EVENTS},
3277 {"ACPI_TABLES", ACPI_TABLES},
3278 {"ACPI_NAMESPACE", ACPI_NAMESPACE},
3279 {"ACPI_PARSER", ACPI_PARSER},
3280 {"ACPI_DISPATCHER", ACPI_DISPATCHER},
3281 {"ACPI_EXECUTER", ACPI_EXECUTER},
3282 {"ACPI_RESOURCES", ACPI_RESOURCES},
3283 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER},
3284 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES},
3285 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER},
3286 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS},
3288 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER},
3289 {"ACPI_BATTERY", ACPI_BATTERY},
3290 {"ACPI_BUS", ACPI_BUS},
3291 {"ACPI_BUTTON", ACPI_BUTTON},
3292 {"ACPI_EC", ACPI_EC},
3293 {"ACPI_FAN", ACPI_FAN},
3294 {"ACPI_POWERRES", ACPI_POWERRES},
3295 {"ACPI_PROCESSOR", ACPI_PROCESSOR},
3296 {"ACPI_THERMAL", ACPI_THERMAL},
3297 {"ACPI_TIMER", ACPI_TIMER},
3298 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS},
3302 static struct debugtag dbg_level[] = {
3303 {"ACPI_LV_INIT", ACPI_LV_INIT},
3304 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT},
3305 {"ACPI_LV_INFO", ACPI_LV_INFO},
3306 {"ACPI_LV_REPAIR", ACPI_LV_REPAIR},
3307 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS},
3309 /* Trace verbosity level 1 [Standard Trace Level] */
3310 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES},
3311 {"ACPI_LV_PARSE", ACPI_LV_PARSE},
3312 {"ACPI_LV_LOAD", ACPI_LV_LOAD},
3313 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH},
3314 {"ACPI_LV_EXEC", ACPI_LV_EXEC},
3315 {"ACPI_LV_NAMES", ACPI_LV_NAMES},
3316 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION},
3317 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD},
3318 {"ACPI_LV_TABLES", ACPI_LV_TABLES},
3319 {"ACPI_LV_VALUES", ACPI_LV_VALUES},
3320 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS},
3321 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES},
3322 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS},
3323 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE},
3324 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1},
3326 /* Trace verbosity level 2 [Function tracing and memory allocation] */
3327 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS},
3328 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS},
3329 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS},
3330 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2},
3331 {"ACPI_LV_ALL", ACPI_LV_ALL},
3333 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */
3334 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX},
3335 {"ACPI_LV_THREADS", ACPI_LV_THREADS},
3336 {"ACPI_LV_IO", ACPI_LV_IO},
3337 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS},
3338 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3},
3340 /* Exceptionally verbose output -- also used in the global "DebugLevel" */
3341 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE},
3342 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO},
3343 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES},
3344 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS},
3345 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE},
3350 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag)
3362 while (*ep && !isspace(*ep))
3373 for (i = 0; tag[i].name != NULL; i++) {
3374 if (!strncmp(cp, tag[i].name, l)) {
3376 *flag |= tag[i].value;
3378 *flag &= ~tag[i].value;
3386 acpi_set_debugging(void *junk)
3388 char *layer, *level;
3395 layer = kgetenv("debug.acpi.layer");
3396 level = kgetenv("debug.acpi.level");
3397 if (layer == NULL && level == NULL)
3400 kprintf("ACPI set debug");
3401 if (layer != NULL) {
3402 if (strcmp("NONE", layer) != 0)
3403 kprintf(" layer '%s'", layer);
3404 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer);
3407 if (level != NULL) {
3408 if (strcmp("NONE", level) != 0)
3409 kprintf(" level '%s'", level);
3410 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel);
3416 SYSINIT(acpi_debugging, SI_BOOT1_TUNABLES, SI_ORDER_ANY, acpi_set_debugging,
3420 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS)
3423 struct debugtag *tag;
3426 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL)
3428 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) {
3429 tag = &dbg_layer[0];
3430 dbg = &AcpiDbgLayer;
3432 tag = &dbg_level[0];
3433 dbg = &AcpiDbgLevel;
3436 /* Get old values if this is a get request. */
3437 ACPI_SERIAL_BEGIN(acpi);
3439 sbuf_cpy(&sb, "NONE");
3440 } else if (req->newptr == NULL) {
3441 for (; tag->name != NULL; tag++) {
3442 if ((*dbg & tag->value) == tag->value)
3443 sbuf_printf(&sb, "%s ", tag->name);
3449 /* Copy out the old values to the user. */
3450 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb));
3453 /* If the user is setting a string, parse it. */
3454 if (error == 0 && req->newptr != NULL) {
3456 ksetenv((char *)oidp->oid_arg1, (char *)req->newptr);
3457 acpi_set_debugging(NULL);
3459 ACPI_SERIAL_END(acpi);
3464 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING,
3465 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", "");
3466 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING,
3467 "debug.acpi.level", 0, acpi_debug_sysctl, "A", "");
3468 #endif /* ACPI_DEBUG */
3471 acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS)
3476 old = acpi_debug_objects;
3477 error = sysctl_handle_int(oidp, &acpi_debug_objects, 0, req);
3478 if (error != 0 || req->newptr == NULL)
3480 if (old == acpi_debug_objects || (old && acpi_debug_objects))
3483 ACPI_SERIAL_BEGIN(acpi);
3484 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE;
3485 ACPI_SERIAL_END(acpi);
3492 acpi_parse_interfaces(char *str, struct acpi_interface *iface)
3499 while (isspace(*p) || *p == ',')
3504 p = kstrdup(p, M_TEMP);
3505 for (i = 0; i < len; i++)
3510 if (isspace(p[i]) || p[i] == '\0')
3513 i += strlen(p + i) + 1;
3520 iface->data = kmalloc(sizeof(*iface->data) * j, M_TEMP, M_WAITOK);
3524 if (isspace(p[i]) || p[i] == '\0')
3527 iface->data[j] = p + i;
3528 i += strlen(p + i) + 1;
3536 acpi_free_interfaces(struct acpi_interface *iface)
3538 kfree(iface->data[0], M_TEMP);
3539 kfree(iface->data, M_TEMP);
3543 acpi_reset_interfaces(device_t dev)
3545 struct acpi_interface list;
3549 if (acpi_parse_interfaces(acpi_install_interface, &list) > 0) {
3550 for (i = 0; i < list.num; i++) {
3551 status = AcpiInstallInterface(list.data[i]);
3552 if (ACPI_FAILURE(status))
3554 "failed to install _OSI(\"%s\"): %s\n",
3555 list.data[i], AcpiFormatException(status));
3556 else if (bootverbose)
3557 device_printf(dev, "installed _OSI(\"%s\")\n",
3560 acpi_free_interfaces(&list);
3562 if (acpi_parse_interfaces(acpi_remove_interface, &list) > 0) {
3563 for (i = 0; i < list.num; i++) {
3564 status = AcpiRemoveInterface(list.data[i]);
3565 if (ACPI_FAILURE(status))
3567 "failed to remove _OSI(\"%s\"): %s\n",
3568 list.data[i], AcpiFormatException(status));
3569 else if (bootverbose)
3570 device_printf(dev, "removed _OSI(\"%s\")\n",
3573 acpi_free_interfaces(&list);
3578 acpi_pm_func(u_long cmd, void *arg, ...)
3580 int state, acpi_state;
3582 struct acpi_softc *sc;
3587 case POWER_CMD_SUSPEND:
3588 sc = (struct acpi_softc *)arg;
3595 state = va_arg(ap, int);
3599 case POWER_SLEEP_STATE_STANDBY:
3600 acpi_state = sc->acpi_standby_sx;
3602 case POWER_SLEEP_STATE_SUSPEND:
3603 acpi_state = sc->acpi_suspend_sx;
3605 case POWER_SLEEP_STATE_HIBERNATE:
3606 acpi_state = ACPI_STATE_S4;
3613 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state)))
3626 acpi_pm_register(void *arg)
3628 if (!cold || resource_disabled("acpi", 0))
3631 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL);
3634 SYSINIT(power, SI_BOOT2_KLD, SI_ORDER_ANY, acpi_pm_register, 0);