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("$FreeBSD$");
35 #include <sys/param.h>
36 #include <sys/kernel.h>
38 #include <sys/fcntl.h>
39 #include <sys/malloc.h>
40 #include <sys/module.h>
43 #include <sys/ioccom.h>
44 #include <sys/reboot.h>
45 #include <sys/sysctl.h>
46 #include <sys/ctype.h>
47 #include <sys/linker.h>
48 #include <sys/mount.h>
49 #include <sys/power.h>
51 #include <sys/sched.h>
53 #include <sys/timetc.h>
55 #if defined(__i386__) || defined(__amd64__)
56 #include <machine/clock.h>
57 #include <machine/pci_cfgreg.h>
59 #include <machine/resource.h>
60 #include <machine/bus.h>
62 #include <isa/isavar.h>
63 #include <isa/pnpvar.h>
65 #include <contrib/dev/acpica/include/acpi.h>
66 #include <contrib/dev/acpica/include/accommon.h>
67 #include <contrib/dev/acpica/include/acnamesp.h>
69 #include <dev/acpica/acpivar.h>
70 #include <dev/acpica/acpiio.h>
72 #include <dev/pci/pcivar.h>
74 #include <vm/vm_param.h>
76 static MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices");
78 /* Hooks for the ACPI CA debugging infrastructure */
79 #define _COMPONENT ACPI_BUS
80 ACPI_MODULE_NAME("ACPI")
82 static d_open_t acpiopen;
83 static d_close_t acpiclose;
84 static d_ioctl_t acpiioctl;
86 static struct cdevsw acpi_cdevsw = {
87 .d_version = D_VERSION,
94 struct acpi_interface {
99 static char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL };
100 static char *pcilink_ids[] = { "PNP0C0F", NULL };
102 /* Global mutex for locking access to the ACPI subsystem. */
103 struct mtx acpi_mutex;
104 struct callout acpi_sleep_timer;
106 /* Bitmap of device quirks. */
109 /* Supported sleep states. */
110 static BOOLEAN acpi_sleep_states[ACPI_S_STATE_COUNT];
112 static void acpi_lookup(void *arg, const char *name, device_t *dev);
113 static int acpi_modevent(struct module *mod, int event, void *junk);
114 static int acpi_probe(device_t dev);
115 static int acpi_attach(device_t dev);
116 static int acpi_suspend(device_t dev);
117 static int acpi_resume(device_t dev);
118 static int acpi_shutdown(device_t dev);
119 static device_t acpi_add_child(device_t bus, u_int order, const char *name,
121 static int acpi_print_child(device_t bus, device_t child);
122 static void acpi_probe_nomatch(device_t bus, device_t child);
123 static void acpi_driver_added(device_t dev, driver_t *driver);
124 static void acpi_child_deleted(device_t dev, device_t child);
125 static int acpi_read_ivar(device_t dev, device_t child, int index,
127 static int acpi_write_ivar(device_t dev, device_t child, int index,
129 static struct resource_list *acpi_get_rlist(device_t dev, device_t child);
130 static void acpi_reserve_resources(device_t dev);
131 static int acpi_sysres_alloc(device_t dev);
132 static int acpi_set_resource(device_t dev, device_t child, int type,
133 int rid, rman_res_t start, rman_res_t count);
134 static struct resource *acpi_alloc_resource(device_t bus, device_t child,
135 int type, int *rid, rman_res_t start, rman_res_t end,
136 rman_res_t count, u_int flags);
137 static int acpi_adjust_resource(device_t bus, device_t child, int type,
138 struct resource *r, rman_res_t start, rman_res_t end);
139 static int acpi_release_resource(device_t bus, device_t child, int type,
140 int rid, struct resource *r);
141 static void acpi_delete_resource(device_t bus, device_t child, int type,
143 static uint32_t acpi_isa_get_logicalid(device_t dev);
144 static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count);
145 static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids);
146 static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev,
147 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters,
149 static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level,
150 void *context, void **retval);
151 static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev,
152 int max_depth, acpi_scan_cb_t user_fn, void *arg);
153 static int acpi_isa_pnp_probe(device_t bus, device_t child,
154 struct isa_pnp_id *ids);
155 static void acpi_platform_osc(device_t dev);
156 static void acpi_probe_children(device_t bus);
157 static void acpi_probe_order(ACPI_HANDLE handle, int *order);
158 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level,
159 void *context, void **status);
160 static void acpi_sleep_enable(void *arg);
161 static ACPI_STATUS acpi_sleep_disable(struct acpi_softc *sc);
162 static ACPI_STATUS acpi_EnterSleepState(struct acpi_softc *sc, int state);
163 static void acpi_shutdown_final(void *arg, int howto);
164 static void acpi_enable_fixed_events(struct acpi_softc *sc);
165 static void acpi_resync_clock(struct acpi_softc *sc);
166 static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate);
167 static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate);
168 static int acpi_wake_prep_walk(int sstate);
169 static int acpi_wake_sysctl_walk(device_t dev);
170 static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS);
171 static void acpi_system_eventhandler_sleep(void *arg, int state);
172 static void acpi_system_eventhandler_wakeup(void *arg, int state);
173 static int acpi_sname2sstate(const char *sname);
174 static const char *acpi_sstate2sname(int sstate);
175 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS);
176 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS);
177 static int acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS);
178 static int acpi_pm_func(u_long cmd, void *arg, ...);
179 static int acpi_child_location_str_method(device_t acdev, device_t child,
180 char *buf, size_t buflen);
181 static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child,
182 char *buf, size_t buflen);
183 static void acpi_enable_pcie(void);
184 static void acpi_hint_device_unit(device_t acdev, device_t child,
185 const char *name, int *unitp);
186 static void acpi_reset_interfaces(device_t dev);
188 static device_method_t acpi_methods[] = {
189 /* Device interface */
190 DEVMETHOD(device_probe, acpi_probe),
191 DEVMETHOD(device_attach, acpi_attach),
192 DEVMETHOD(device_shutdown, acpi_shutdown),
193 DEVMETHOD(device_detach, bus_generic_detach),
194 DEVMETHOD(device_suspend, acpi_suspend),
195 DEVMETHOD(device_resume, acpi_resume),
198 DEVMETHOD(bus_add_child, acpi_add_child),
199 DEVMETHOD(bus_print_child, acpi_print_child),
200 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch),
201 DEVMETHOD(bus_driver_added, acpi_driver_added),
202 DEVMETHOD(bus_child_deleted, acpi_child_deleted),
203 DEVMETHOD(bus_read_ivar, acpi_read_ivar),
204 DEVMETHOD(bus_write_ivar, acpi_write_ivar),
205 DEVMETHOD(bus_get_resource_list, acpi_get_rlist),
206 DEVMETHOD(bus_set_resource, acpi_set_resource),
207 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
208 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource),
209 DEVMETHOD(bus_adjust_resource, acpi_adjust_resource),
210 DEVMETHOD(bus_release_resource, acpi_release_resource),
211 DEVMETHOD(bus_delete_resource, acpi_delete_resource),
212 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method),
213 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method),
214 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
215 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
216 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
217 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
218 DEVMETHOD(bus_hint_device_unit, acpi_hint_device_unit),
219 DEVMETHOD(bus_get_cpus, acpi_get_cpus),
220 DEVMETHOD(bus_get_domain, acpi_get_domain),
223 DEVMETHOD(acpi_id_probe, acpi_device_id_probe),
224 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj),
225 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep),
226 DEVMETHOD(acpi_scan_children, acpi_device_scan_children),
229 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe),
234 static driver_t acpi_driver = {
237 sizeof(struct acpi_softc),
240 static devclass_t acpi_devclass;
241 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0);
242 MODULE_VERSION(acpi, 1);
244 ACPI_SERIAL_DECL(acpi, "ACPI root bus");
246 /* Local pools for managing system resources for ACPI child devices. */
247 static struct rman acpi_rman_io, acpi_rman_mem;
249 #define ACPI_MINIMUM_AWAKETIME 5
251 /* Holds the description of the acpi0 device. */
252 static char acpi_desc[ACPI_OEM_ID_SIZE + ACPI_OEM_TABLE_ID_SIZE + 2];
254 SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging");
255 static char acpi_ca_version[12];
256 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD,
257 acpi_ca_version, 0, "Version of Intel ACPI-CA");
260 * Allow overriding _OSI methods.
262 static char acpi_install_interface[256];
263 TUNABLE_STR("hw.acpi.install_interface", acpi_install_interface,
264 sizeof(acpi_install_interface));
265 static char acpi_remove_interface[256];
266 TUNABLE_STR("hw.acpi.remove_interface", acpi_remove_interface,
267 sizeof(acpi_remove_interface));
269 /* Allow users to dump Debug objects without ACPI debugger. */
270 static int acpi_debug_objects;
271 TUNABLE_INT("debug.acpi.enable_debug_objects", &acpi_debug_objects);
272 SYSCTL_PROC(_debug_acpi, OID_AUTO, enable_debug_objects,
273 CTLFLAG_RW | CTLTYPE_INT, NULL, 0, acpi_debug_objects_sysctl, "I",
274 "Enable Debug objects");
276 /* Allow the interpreter to ignore common mistakes in BIOS. */
277 static int acpi_interpreter_slack = 1;
278 TUNABLE_INT("debug.acpi.interpreter_slack", &acpi_interpreter_slack);
279 SYSCTL_INT(_debug_acpi, OID_AUTO, interpreter_slack, CTLFLAG_RDTUN,
280 &acpi_interpreter_slack, 1, "Turn on interpreter slack mode.");
282 /* Ignore register widths set by FADT and use default widths instead. */
283 static int acpi_ignore_reg_width = 1;
284 TUNABLE_INT("debug.acpi.default_register_width", &acpi_ignore_reg_width);
285 SYSCTL_INT(_debug_acpi, OID_AUTO, default_register_width, CTLFLAG_RDTUN,
286 &acpi_ignore_reg_width, 1, "Ignore register widths set by FADT");
288 /* Allow users to override quirks. */
289 TUNABLE_INT("debug.acpi.quirks", &acpi_quirks);
291 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 * Initialize the ACPICA subsystem.
341 if (ACPI_FAILURE(status = AcpiInitializeSubsystem())) {
342 printf("ACPI: Could not initialize Subsystem: %s\n",
343 AcpiFormatException(status));
344 return_VALUE (status);
348 * Pre-allocate space for RSDT/XSDT and DSDT tables and allow resizing
349 * if more tables exist.
351 if (ACPI_FAILURE(status = AcpiInitializeTables(NULL, 2, TRUE))) {
352 printf("ACPI: Table initialisation failed: %s\n",
353 AcpiFormatException(status));
354 return_VALUE (status);
357 /* Set up any quirks we have for this system. */
358 if (acpi_quirks == ACPI_Q_OK)
359 acpi_table_quirks(&acpi_quirks);
361 /* If the user manually set the disabled hint to 0, force-enable ACPI. */
362 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0)
363 acpi_quirks &= ~ACPI_Q_BROKEN;
364 if (acpi_quirks & ACPI_Q_BROKEN) {
365 printf("ACPI disabled by blacklist. Contact your BIOS vendor.\n");
369 return_VALUE (status);
373 * Detect ACPI and perform early initialisation.
378 ACPI_TABLE_RSDP *rsdp;
379 ACPI_TABLE_HEADER *rsdt;
380 ACPI_PHYSICAL_ADDRESS paddr;
383 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
388 /* Check that we haven't been disabled with a hint. */
389 if (resource_disabled("acpi", 0))
392 /* Check for other PM systems. */
393 if (power_pm_get_type() != POWER_PM_TYPE_NONE &&
394 power_pm_get_type() != POWER_PM_TYPE_ACPI) {
395 printf("ACPI identify failed, other PM system enabled.\n");
399 /* Initialize root tables. */
400 if (ACPI_FAILURE(acpi_Startup())) {
401 printf("ACPI: Try disabling either ACPI or apic support.\n");
405 if ((paddr = AcpiOsGetRootPointer()) == 0 ||
406 (rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP))) == NULL)
408 if (rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress != 0)
409 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress;
411 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress;
412 AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP));
414 if ((rsdt = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER))) == NULL)
416 sbuf_new(&sb, acpi_desc, sizeof(acpi_desc), SBUF_FIXEDLEN);
417 sbuf_bcat(&sb, rsdt->OemId, ACPI_OEM_ID_SIZE);
420 sbuf_bcat(&sb, rsdt->OemTableId, ACPI_OEM_TABLE_ID_SIZE);
424 AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER));
426 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%x", ACPI_CA_VERSION);
432 * Fetch some descriptive data from ACPI to put in our attach message.
435 acpi_probe(device_t dev)
438 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
440 device_set_desc(dev, acpi_desc);
442 return_VALUE (BUS_PROBE_NOWILDCARD);
446 acpi_attach(device_t dev)
448 struct acpi_softc *sc;
455 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
457 sc = device_get_softc(dev);
459 callout_init(&sc->susp_force_to, 1);
463 /* Initialize resource manager. */
464 acpi_rman_io.rm_type = RMAN_ARRAY;
465 acpi_rman_io.rm_start = 0;
466 acpi_rman_io.rm_end = 0xffff;
467 acpi_rman_io.rm_descr = "ACPI I/O ports";
468 if (rman_init(&acpi_rman_io) != 0)
469 panic("acpi rman_init IO ports failed");
470 acpi_rman_mem.rm_type = RMAN_ARRAY;
471 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses";
472 if (rman_init(&acpi_rman_mem) != 0)
473 panic("acpi rman_init memory failed");
475 /* Initialise the ACPI mutex */
476 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF);
479 * Set the globals from our tunables. This is needed because ACPI-CA
480 * uses UINT8 for some values and we have no tunable_byte.
482 AcpiGbl_EnableInterpreterSlack = acpi_interpreter_slack ? TRUE : FALSE;
483 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE;
484 AcpiGbl_UseDefaultRegisterWidths = acpi_ignore_reg_width ? TRUE : FALSE;
488 * Disable all debugging layers and levels.
494 /* Override OS interfaces if the user requested. */
495 acpi_reset_interfaces(dev);
497 /* Load ACPI name space. */
498 status = AcpiLoadTables();
499 if (ACPI_FAILURE(status)) {
500 device_printf(dev, "Could not load Namespace: %s\n",
501 AcpiFormatException(status));
505 /* Handle MCFG table if present. */
509 * Note that some systems (specifically, those with namespace evaluation
510 * issues that require the avoidance of parts of the namespace) must
511 * avoid running _INI and _STA on everything, as well as dodging the final
514 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT).
516 * XXX We should arrange for the object init pass after we have attached
517 * all our child devices, but on many systems it works here.
520 if (testenv("debug.acpi.avoid"))
521 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT;
523 /* Bring the hardware and basic handlers online. */
524 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) {
525 device_printf(dev, "Could not enable ACPI: %s\n",
526 AcpiFormatException(status));
531 * Call the ECDT probe function to provide EC functionality before
532 * the namespace has been evaluated.
534 * XXX This happens before the sysresource devices have been probed and
535 * attached so its resources come from nexus0. In practice, this isn't
536 * a problem but should be addressed eventually.
538 acpi_ec_ecdt_probe(dev);
540 /* Bring device objects and regions online. */
541 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) {
542 device_printf(dev, "Could not initialize ACPI objects: %s\n",
543 AcpiFormatException(status));
548 * Setup our sysctl tree.
550 * XXX: This doesn't check to make sure that none of these fail.
552 sysctl_ctx_init(&sc->acpi_sysctl_ctx);
553 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx,
554 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO,
555 device_get_name(dev), CTLFLAG_RD, 0, "");
556 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
557 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD,
558 0, 0, acpi_supported_sleep_state_sysctl, "A",
559 "List supported ACPI sleep states.");
560 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
561 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW,
562 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A",
563 "Power button ACPI sleep state.");
564 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
565 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW,
566 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A",
567 "Sleep button ACPI sleep state.");
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 "Lid ACPI sleep state. Set to S3 if you want to suspend your laptop when close the Lid.");
572 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
573 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW,
574 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", "");
575 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
576 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW,
577 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", "");
578 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
579 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0,
580 "sleep delay in seconds");
581 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
582 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode");
583 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
584 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode");
585 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
586 OID_AUTO, "disable_on_reboot", CTLFLAG_RW,
587 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system");
588 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
589 OID_AUTO, "handle_reboot", CTLFLAG_RW,
590 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot");
593 * Default to 1 second before sleeping to give some machines time to
596 sc->acpi_sleep_delay = 1;
598 sc->acpi_verbose = 1;
599 if ((env = kern_getenv("hw.acpi.verbose")) != NULL) {
600 if (strcmp(env, "0") != 0)
601 sc->acpi_verbose = 1;
605 /* Only enable reboot by default if the FADT says it is available. */
606 if (AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER)
607 sc->acpi_handle_reboot = 1;
609 #if !ACPI_REDUCED_HARDWARE
610 /* Only enable S4BIOS by default if the FACS says it is available. */
611 if (AcpiGbl_FACS != NULL && AcpiGbl_FACS->Flags & ACPI_FACS_S4_BIOS_PRESENT)
615 /* Probe all supported sleep states. */
616 acpi_sleep_states[ACPI_STATE_S0] = TRUE;
617 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++)
618 if (ACPI_SUCCESS(AcpiEvaluateObject(ACPI_ROOT_OBJECT,
619 __DECONST(char *, AcpiGbl_SleepStateNames[state]), NULL, NULL)) &&
620 ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB)))
621 acpi_sleep_states[state] = TRUE;
624 * Dispatch the default sleep state to devices. The lid switch is set
625 * to UNKNOWN by default to avoid surprising users.
627 sc->acpi_power_button_sx = acpi_sleep_states[ACPI_STATE_S5] ?
628 ACPI_STATE_S5 : ACPI_STATE_UNKNOWN;
629 sc->acpi_lid_switch_sx = ACPI_STATE_UNKNOWN;
630 sc->acpi_standby_sx = acpi_sleep_states[ACPI_STATE_S1] ?
631 ACPI_STATE_S1 : ACPI_STATE_UNKNOWN;
632 sc->acpi_suspend_sx = acpi_sleep_states[ACPI_STATE_S3] ?
633 ACPI_STATE_S3 : ACPI_STATE_UNKNOWN;
635 /* Pick the first valid sleep state for the sleep button default. */
636 sc->acpi_sleep_button_sx = ACPI_STATE_UNKNOWN;
637 for (state = ACPI_STATE_S1; state <= ACPI_STATE_S4; state++)
638 if (acpi_sleep_states[state]) {
639 sc->acpi_sleep_button_sx = state;
643 acpi_enable_fixed_events(sc);
646 * Scan the namespace and attach/initialise children.
649 /* Register our shutdown handler. */
650 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc,
654 * Register our acpi event handlers.
655 * XXX should be configurable eg. via userland policy manager.
657 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep,
658 sc, ACPI_EVENT_PRI_LAST);
659 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup,
660 sc, ACPI_EVENT_PRI_LAST);
662 /* Flag our initial states. */
663 sc->acpi_enabled = TRUE;
664 sc->acpi_sstate = ACPI_STATE_S0;
665 sc->acpi_sleep_disabled = TRUE;
667 /* Create the control device */
668 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0664,
670 sc->acpi_dev_t->si_drv1 = sc;
672 if ((error = acpi_machdep_init(dev)))
675 /* Register ACPI again to pass the correct argument of pm_func. */
676 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc);
678 acpi_platform_osc(dev);
680 if (!acpi_disabled("bus")) {
681 EVENTHANDLER_REGISTER(dev_lookup, acpi_lookup, NULL, 1000);
682 acpi_probe_children(dev);
685 /* Update all GPEs and enable runtime GPEs. */
686 status = AcpiUpdateAllGpes();
687 if (ACPI_FAILURE(status))
688 device_printf(dev, "Could not update all GPEs: %s\n",
689 AcpiFormatException(status));
691 /* Allow sleep request after a while. */
692 callout_init_mtx(&acpi_sleep_timer, &acpi_mutex, 0);
693 callout_reset(&acpi_sleep_timer, hz * ACPI_MINIMUM_AWAKETIME,
694 acpi_sleep_enable, sc);
699 return_VALUE (error);
703 acpi_set_power_children(device_t dev, int state)
707 int dstate, i, numdevs;
709 if (device_get_children(dev, &devlist, &numdevs) != 0)
713 * Retrieve and set D-state for the sleep state if _SxD is present.
714 * Skip children who aren't attached since they are handled separately.
716 for (i = 0; i < numdevs; i++) {
719 if (device_is_attached(child) &&
720 acpi_device_pwr_for_sleep(dev, child, &dstate) == 0)
721 acpi_set_powerstate(child, dstate);
723 free(devlist, M_TEMP);
727 acpi_suspend(device_t dev)
733 error = bus_generic_suspend(dev);
735 acpi_set_power_children(dev, ACPI_STATE_D3);
741 acpi_resume(device_t dev)
746 acpi_set_power_children(dev, ACPI_STATE_D0);
748 return (bus_generic_resume(dev));
752 acpi_shutdown(device_t dev)
757 /* Allow children to shutdown first. */
758 bus_generic_shutdown(dev);
761 * Enable any GPEs that are able to power-on the system (i.e., RTC).
762 * Also, disable any that are not valid for this state (most).
764 acpi_wake_prep_walk(ACPI_STATE_S5);
770 * Handle a new device being added
773 acpi_add_child(device_t bus, u_int order, const char *name, int unit)
775 struct acpi_device *ad;
778 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL)
781 resource_list_init(&ad->ad_rl);
783 child = device_add_child_ordered(bus, order, name, unit);
785 device_set_ivars(child, ad);
792 acpi_print_child(device_t bus, device_t child)
794 struct acpi_device *adev = device_get_ivars(child);
795 struct resource_list *rl = &adev->ad_rl;
798 retval += bus_print_child_header(bus, child);
799 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#jx");
800 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#jx");
801 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%jd");
802 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%jd");
803 if (device_get_flags(child))
804 retval += printf(" flags %#x", device_get_flags(child));
805 retval += bus_print_child_domain(bus, child);
806 retval += bus_print_child_footer(bus, child);
812 * If this device is an ACPI child but no one claimed it, attempt
813 * to power it off. We'll power it back up when a driver is added.
815 * XXX Disabled for now since many necessary devices (like fdc and
816 * ATA) don't claim the devices we created for them but still expect
817 * them to be powered up.
820 acpi_probe_nomatch(device_t bus, device_t child)
822 #ifdef ACPI_ENABLE_POWERDOWN_NODRIVER
823 acpi_set_powerstate(child, ACPI_STATE_D3);
828 * If a new driver has a chance to probe a child, first power it up.
830 * XXX Disabled for now (see acpi_probe_nomatch for details).
833 acpi_driver_added(device_t dev, driver_t *driver)
835 device_t child, *devlist;
838 DEVICE_IDENTIFY(driver, dev);
839 if (device_get_children(dev, &devlist, &numdevs))
841 for (i = 0; i < numdevs; i++) {
843 if (device_get_state(child) == DS_NOTPRESENT) {
844 #ifdef ACPI_ENABLE_POWERDOWN_NODRIVER
845 acpi_set_powerstate(child, ACPI_STATE_D0);
846 if (device_probe_and_attach(child) != 0)
847 acpi_set_powerstate(child, ACPI_STATE_D3);
849 device_probe_and_attach(child);
853 free(devlist, M_TEMP);
856 /* Location hint for devctl(8) */
858 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf,
861 struct acpi_device *dinfo = device_get_ivars(child);
865 if (dinfo->ad_handle) {
866 snprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle));
867 if (ACPI_SUCCESS(acpi_GetInteger(dinfo->ad_handle, "_PXM", &pxm))) {
868 snprintf(buf2, 32, " _PXM=%d", pxm);
869 strlcat(buf, buf2, buflen);
872 snprintf(buf, buflen, "");
877 /* PnP information for devctl(8) */
879 acpi_pnpinfo_str(ACPI_HANDLE handle, char *buf, size_t buflen)
881 ACPI_DEVICE_INFO *adinfo;
883 if (ACPI_FAILURE(AcpiGetObjectInfo(handle, &adinfo))) {
884 snprintf(buf, buflen, "unknown");
888 snprintf(buf, buflen, "_HID=%s _UID=%lu _CID=%s",
889 (adinfo->Valid & ACPI_VALID_HID) ?
890 adinfo->HardwareId.String : "none",
891 (adinfo->Valid & ACPI_VALID_UID) ?
892 strtoul(adinfo->UniqueId.String, NULL, 10) : 0UL,
893 ((adinfo->Valid & ACPI_VALID_CID) &&
894 adinfo->CompatibleIdList.Count > 0) ?
895 adinfo->CompatibleIdList.Ids[0].String : "none");
902 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf,
905 struct acpi_device *dinfo = device_get_ivars(child);
907 return (acpi_pnpinfo_str(dinfo->ad_handle, buf, buflen));
911 * Handle device deletion.
914 acpi_child_deleted(device_t dev, device_t child)
916 struct acpi_device *dinfo = device_get_ivars(child);
918 if (acpi_get_device(dinfo->ad_handle) == child)
919 AcpiDetachData(dinfo->ad_handle, acpi_fake_objhandler);
923 * Handle per-device ivars
926 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
928 struct acpi_device *ad;
930 if ((ad = device_get_ivars(child)) == NULL) {
931 device_printf(child, "device has no ivars\n");
935 /* ACPI and ISA compatibility ivars */
937 case ACPI_IVAR_HANDLE:
938 *(ACPI_HANDLE *)result = ad->ad_handle;
940 case ACPI_IVAR_PRIVATE:
941 *(void **)result = ad->ad_private;
943 case ACPI_IVAR_FLAGS:
944 *(int *)result = ad->ad_flags;
946 case ISA_IVAR_VENDORID:
947 case ISA_IVAR_SERIAL:
948 case ISA_IVAR_COMPATID:
951 case ISA_IVAR_LOGICALID:
952 *(int *)result = acpi_isa_get_logicalid(child);
955 *(uint8_t*)result = (ad->ad_cls_class >> 16) & 0xff;
957 case PCI_IVAR_SUBCLASS:
958 *(uint8_t*)result = (ad->ad_cls_class >> 8) & 0xff;
960 case PCI_IVAR_PROGIF:
961 *(uint8_t*)result = (ad->ad_cls_class >> 0) & 0xff;
971 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value)
973 struct acpi_device *ad;
975 if ((ad = device_get_ivars(child)) == NULL) {
976 device_printf(child, "device has no ivars\n");
981 case ACPI_IVAR_HANDLE:
982 ad->ad_handle = (ACPI_HANDLE)value;
984 case ACPI_IVAR_PRIVATE:
985 ad->ad_private = (void *)value;
987 case ACPI_IVAR_FLAGS:
988 ad->ad_flags = (int)value;
991 panic("bad ivar write request (%d)", index);
999 * Handle child resource allocation/removal
1001 static struct resource_list *
1002 acpi_get_rlist(device_t dev, device_t child)
1004 struct acpi_device *ad;
1006 ad = device_get_ivars(child);
1007 return (&ad->ad_rl);
1011 acpi_match_resource_hint(device_t dev, int type, long value)
1013 struct acpi_device *ad = device_get_ivars(dev);
1014 struct resource_list *rl = &ad->ad_rl;
1015 struct resource_list_entry *rle;
1017 STAILQ_FOREACH(rle, rl, link) {
1018 if (rle->type != type)
1020 if (rle->start <= value && rle->end >= value)
1027 * Wire device unit numbers based on resource matches in hints.
1030 acpi_hint_device_unit(device_t acdev, device_t child, const char *name,
1035 int line, matches, unit;
1038 * Iterate over all the hints for the devices with the specified
1039 * name to see if one's resources are a subset of this device.
1042 while (resource_find_dev(&line, name, &unit, "at", NULL) == 0) {
1043 /* Must have an "at" for acpi or isa. */
1044 resource_string_value(name, unit, "at", &s);
1045 if (!(strcmp(s, "acpi0") == 0 || strcmp(s, "acpi") == 0 ||
1046 strcmp(s, "isa0") == 0 || strcmp(s, "isa") == 0))
1050 * Check for matching resources. We must have at least one match.
1051 * Since I/O and memory resources cannot be shared, if we get a
1052 * match on either of those, ignore any mismatches in IRQs or DRQs.
1054 * XXX: We may want to revisit this to be more lenient and wire
1055 * as long as it gets one match.
1058 if (resource_long_value(name, unit, "port", &value) == 0) {
1060 * Floppy drive controllers are notorious for having a
1061 * wide variety of resources not all of which include the
1062 * first port that is specified by the hint (typically
1063 * 0x3f0) (see the comment above fdc_isa_alloc_resources()
1064 * in fdc_isa.c). However, they do all seem to include
1065 * port + 2 (e.g. 0x3f2) so for a floppy device, look for
1066 * 'value + 2' in the port resources instead of the hint
1069 if (strcmp(name, "fdc") == 0)
1071 if (acpi_match_resource_hint(child, SYS_RES_IOPORT, value))
1076 if (resource_long_value(name, unit, "maddr", &value) == 0) {
1077 if (acpi_match_resource_hint(child, SYS_RES_MEMORY, value))
1084 if (resource_long_value(name, unit, "irq", &value) == 0) {
1085 if (acpi_match_resource_hint(child, SYS_RES_IRQ, value))
1090 if (resource_long_value(name, unit, "drq", &value) == 0) {
1091 if (acpi_match_resource_hint(child, SYS_RES_DRQ, value))
1099 /* We have a winner! */
1107 * Fetch the NUMA domain for a device by mapping the value returned by
1108 * _PXM to a NUMA domain. If the device does not have a _PXM method,
1109 * -2 is returned. If any other error occurs, -1 is returned.
1112 acpi_parse_pxm(device_t dev)
1115 #if defined(__i386__) || defined(__amd64__)
1120 handle = acpi_get_handle(dev);
1123 status = acpi_GetInteger(handle, "_PXM", &pxm);
1124 if (ACPI_SUCCESS(status))
1125 return (acpi_map_pxm_to_vm_domainid(pxm));
1126 if (status == AE_NOT_FOUND)
1134 acpi_get_cpus(device_t dev, device_t child, enum cpu_sets op, size_t setsize,
1139 d = acpi_parse_pxm(child);
1141 return (bus_generic_get_cpus(dev, child, op, setsize, cpuset));
1145 if (setsize != sizeof(cpuset_t))
1147 *cpuset = cpuset_domain[d];
1150 error = bus_generic_get_cpus(dev, child, op, setsize, cpuset);
1153 if (setsize != sizeof(cpuset_t))
1155 CPU_AND(cpuset, &cpuset_domain[d]);
1158 return (bus_generic_get_cpus(dev, child, op, setsize, cpuset));
1163 * Fetch the NUMA domain for the given device 'dev'.
1165 * If a device has a _PXM method, map that to a NUMA domain.
1166 * Otherwise, pass the request up to the parent.
1167 * If there's no matching domain or the domain cannot be
1168 * determined, return ENOENT.
1171 acpi_get_domain(device_t dev, device_t child, int *domain)
1175 d = acpi_parse_pxm(child);
1183 /* No _PXM node; go up a level */
1184 return (bus_generic_get_domain(dev, child, domain));
1188 * Pre-allocate/manage all memory and IO resources. Since rman can't handle
1189 * duplicates, we merge any in the sysresource attach routine.
1192 acpi_sysres_alloc(device_t dev)
1194 struct resource *res;
1195 struct resource_list *rl;
1196 struct resource_list_entry *rle;
1202 * Probe/attach any sysresource devices. This would be unnecessary if we
1203 * had multi-pass probe/attach.
1205 if (device_get_children(dev, &children, &child_count) != 0)
1207 for (i = 0; i < child_count; i++) {
1208 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL)
1209 device_probe_and_attach(children[i]);
1211 free(children, M_TEMP);
1213 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev);
1214 STAILQ_FOREACH(rle, rl, link) {
1215 if (rle->res != NULL) {
1216 device_printf(dev, "duplicate resource for %jx\n", rle->start);
1220 /* Only memory and IO resources are valid here. */
1221 switch (rle->type) {
1222 case SYS_RES_IOPORT:
1225 case SYS_RES_MEMORY:
1226 rm = &acpi_rman_mem;
1232 /* Pre-allocate resource and add to our rman pool. */
1233 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type,
1234 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 0);
1236 rman_manage_region(rm, rman_get_start(res), rman_get_end(res));
1238 } else if (bootverbose)
1239 device_printf(dev, "reservation of %jx, %jx (%d) failed\n",
1240 rle->start, rle->count, rle->type);
1246 * Reserve declared resources for devices found during attach once system
1247 * resources have been allocated.
1250 acpi_reserve_resources(device_t dev)
1252 struct resource_list_entry *rle;
1253 struct resource_list *rl;
1254 struct acpi_device *ad;
1255 struct acpi_softc *sc;
1259 sc = device_get_softc(dev);
1260 if (device_get_children(dev, &children, &child_count) != 0)
1262 for (i = 0; i < child_count; i++) {
1263 ad = device_get_ivars(children[i]);
1266 /* Don't reserve system resources. */
1267 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL)
1270 STAILQ_FOREACH(rle, rl, link) {
1272 * Don't reserve IRQ resources. There are many sticky things
1273 * to get right otherwise (e.g. IRQs for psm, atkbd, and HPET
1274 * when using legacy routing).
1276 if (rle->type == SYS_RES_IRQ)
1280 * Don't reserve the resource if it is already allocated.
1281 * The acpi_ec(4) driver can allocate its resources early
1282 * if ECDT is present.
1284 if (rle->res != NULL)
1288 * Try to reserve the resource from our parent. If this
1289 * fails because the resource is a system resource, just
1290 * let it be. The resource range is already reserved so
1291 * that other devices will not use it. If the driver
1292 * needs to allocate the resource, then
1293 * acpi_alloc_resource() will sub-alloc from the system
1296 resource_list_reserve(rl, dev, children[i], rle->type, &rle->rid,
1297 rle->start, rle->end, rle->count, 0);
1300 free(children, M_TEMP);
1301 sc->acpi_resources_reserved = 1;
1305 acpi_set_resource(device_t dev, device_t child, int type, int rid,
1306 rman_res_t start, rman_res_t count)
1308 struct acpi_softc *sc = device_get_softc(dev);
1309 struct acpi_device *ad = device_get_ivars(child);
1310 struct resource_list *rl = &ad->ad_rl;
1311 ACPI_DEVICE_INFO *devinfo;
1315 /* Ignore IRQ resources for PCI link devices. */
1316 if (type == SYS_RES_IRQ && ACPI_ID_PROBE(dev, child, pcilink_ids) != NULL)
1320 * Ignore most resources for PCI root bridges. Some BIOSes
1321 * incorrectly enumerate the memory ranges they decode as plain
1322 * memory resources instead of as ResourceProducer ranges. Other
1323 * BIOSes incorrectly list system resource entries for I/O ranges
1324 * under the PCI bridge. Do allow the one known-correct case on
1325 * x86 of a PCI bridge claiming the I/O ports used for PCI config
1328 if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) {
1329 if (ACPI_SUCCESS(AcpiGetObjectInfo(ad->ad_handle, &devinfo))) {
1330 if ((devinfo->Flags & ACPI_PCI_ROOT_BRIDGE) != 0) {
1331 #if defined(__i386__) || defined(__amd64__)
1332 allow = (type == SYS_RES_IOPORT && start == CONF1_ADDR_PORT);
1337 AcpiOsFree(devinfo);
1341 AcpiOsFree(devinfo);
1346 /* map with default for now */
1347 if (type == SYS_RES_IRQ)
1348 start = (rman_res_t)acpi_map_intr(child, (u_int)start,
1349 acpi_get_handle(child));
1352 /* If the resource is already allocated, fail. */
1353 if (resource_list_busy(rl, type, rid))
1356 /* If the resource is already reserved, release it. */
1357 if (resource_list_reserved(rl, type, rid))
1358 resource_list_unreserve(rl, dev, child, type, rid);
1360 /* Add the resource. */
1361 end = (start + count - 1);
1362 resource_list_add(rl, type, rid, start, end, count);
1364 /* Don't reserve resources until the system resources are allocated. */
1365 if (!sc->acpi_resources_reserved)
1368 /* Don't reserve system resources. */
1369 if (ACPI_ID_PROBE(dev, child, sysres_ids) != NULL)
1373 * Don't reserve IRQ resources. There are many sticky things to
1374 * get right otherwise (e.g. IRQs for psm, atkbd, and HPET when
1375 * using legacy routing).
1377 if (type == SYS_RES_IRQ)
1381 * Don't reserve resources for CPU devices. Some of these
1382 * resources need to be allocated as shareable, but reservations
1383 * are always non-shareable.
1385 if (device_get_devclass(child) == devclass_find("cpu"))
1389 * Reserve the resource.
1391 * XXX: Ignores failure for now. Failure here is probably a
1392 * BIOS/firmware bug?
1394 resource_list_reserve(rl, dev, child, type, &rid, start, end, count, 0);
1398 static struct resource *
1399 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid,
1400 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
1405 struct acpi_device *ad;
1406 struct resource_list_entry *rle;
1407 struct resource_list *rl;
1408 struct resource *res;
1409 int isdefault = RMAN_IS_DEFAULT_RANGE(start, end);
1412 * First attempt at allocating the resource. For direct children,
1413 * use resource_list_alloc() to handle reserved resources. For
1414 * other devices, pass the request up to our parent.
1416 if (bus == device_get_parent(child)) {
1417 ad = device_get_ivars(child);
1421 * Simulate the behavior of the ISA bus for direct children
1422 * devices. That is, if a non-default range is specified for
1423 * a resource that doesn't exist, use bus_set_resource() to
1424 * add the resource before allocating it. Note that these
1425 * resources will not be reserved.
1427 if (!isdefault && resource_list_find(rl, type, *rid) == NULL)
1428 resource_list_add(rl, type, *rid, start, end, count);
1429 res = resource_list_alloc(rl, bus, child, type, rid, start, end, count,
1432 if (res != NULL && type == SYS_RES_IRQ) {
1434 * Since bus_config_intr() takes immediate effect, we cannot
1435 * configure the interrupt associated with a device when we
1436 * parse the resources but have to defer it until a driver
1437 * actually allocates the interrupt via bus_alloc_resource().
1439 * XXX: Should we handle the lookup failing?
1441 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares)))
1442 acpi_config_intr(child, &ares);
1447 * If this is an allocation of the "default" range for a given
1448 * RID, fetch the exact bounds for this resource from the
1449 * resource list entry to try to allocate the range from the
1450 * system resource regions.
1452 if (res == NULL && isdefault) {
1453 rle = resource_list_find(rl, type, *rid);
1461 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid,
1462 start, end, count, flags);
1465 * If the first attempt failed and this is an allocation of a
1466 * specific range, try to satisfy the request via a suballocation
1467 * from our system resource regions.
1469 if (res == NULL && start + count - 1 == end)
1470 res = acpi_alloc_sysres(child, type, rid, start, end, count, flags);
1475 * Attempt to allocate a specific resource range from the system
1476 * resource ranges. Note that we only handle memory and I/O port
1480 acpi_alloc_sysres(device_t child, int type, int *rid, rman_res_t start,
1481 rman_res_t end, rman_res_t count, u_int flags)
1484 struct resource *res;
1487 case SYS_RES_IOPORT:
1490 case SYS_RES_MEMORY:
1491 rm = &acpi_rman_mem;
1497 KASSERT(start + count - 1 == end, ("wildcard resource range"));
1498 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE,
1503 rman_set_rid(res, *rid);
1505 /* If requested, activate the resource using the parent's method. */
1506 if (flags & RF_ACTIVE)
1507 if (bus_activate_resource(child, type, *rid, res) != 0) {
1508 rman_release_resource(res);
1516 acpi_is_resource_managed(int type, struct resource *r)
1519 /* We only handle memory and IO resources through rman. */
1521 case SYS_RES_IOPORT:
1522 return (rman_is_region_manager(r, &acpi_rman_io));
1523 case SYS_RES_MEMORY:
1524 return (rman_is_region_manager(r, &acpi_rman_mem));
1530 acpi_adjust_resource(device_t bus, device_t child, int type, struct resource *r,
1531 rman_res_t start, rman_res_t end)
1534 if (acpi_is_resource_managed(type, r))
1535 return (rman_adjust_resource(r, start, end));
1536 return (bus_generic_adjust_resource(bus, child, type, r, start, end));
1540 acpi_release_resource(device_t bus, device_t child, int type, int rid,
1546 * If this resource belongs to one of our internal managers,
1547 * deactivate it and release it to the local pool.
1549 if (acpi_is_resource_managed(type, r)) {
1550 if (rman_get_flags(r) & RF_ACTIVE) {
1551 ret = bus_deactivate_resource(child, type, rid, r);
1555 return (rman_release_resource(r));
1558 return (bus_generic_rl_release_resource(bus, child, type, rid, r));
1562 acpi_delete_resource(device_t bus, device_t child, int type, int rid)
1564 struct resource_list *rl;
1566 rl = acpi_get_rlist(bus, child);
1567 if (resource_list_busy(rl, type, rid)) {
1568 device_printf(bus, "delete_resource: Resource still owned by child"
1569 " (type=%d, rid=%d)\n", type, rid);
1572 resource_list_unreserve(rl, bus, child, type, rid);
1573 resource_list_delete(rl, type, rid);
1576 /* Allocate an IO port or memory resource, given its GAS. */
1578 acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas,
1579 struct resource **res, u_int flags)
1581 int error, res_type;
1584 if (type == NULL || rid == NULL || gas == NULL || res == NULL)
1587 /* We only support memory and IO spaces. */
1588 switch (gas->SpaceId) {
1589 case ACPI_ADR_SPACE_SYSTEM_MEMORY:
1590 res_type = SYS_RES_MEMORY;
1592 case ACPI_ADR_SPACE_SYSTEM_IO:
1593 res_type = SYS_RES_IOPORT;
1596 return (EOPNOTSUPP);
1600 * If the register width is less than 8, assume the BIOS author means
1601 * it is a bit field and just allocate a byte.
1603 if (gas->BitWidth && gas->BitWidth < 8)
1606 /* Validate the address after we're sure we support the space. */
1607 if (gas->Address == 0 || gas->BitWidth == 0)
1610 bus_set_resource(dev, res_type, *rid, gas->Address,
1612 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags);
1617 bus_delete_resource(dev, res_type, *rid);
1622 /* Probe _HID and _CID for compatible ISA PNP ids. */
1624 acpi_isa_get_logicalid(device_t dev)
1626 ACPI_DEVICE_INFO *devinfo;
1630 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1632 /* Fetch and validate the HID. */
1633 if ((h = acpi_get_handle(dev)) == NULL ||
1634 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
1637 pnpid = (devinfo->Valid & ACPI_VALID_HID) != 0 &&
1638 devinfo->HardwareId.Length >= ACPI_EISAID_STRING_SIZE ?
1639 PNP_EISAID(devinfo->HardwareId.String) : 0;
1640 AcpiOsFree(devinfo);
1642 return_VALUE (pnpid);
1646 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count)
1648 ACPI_DEVICE_INFO *devinfo;
1649 ACPI_PNP_DEVICE_ID *ids;
1654 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1658 /* Fetch and validate the CID */
1659 if ((h = acpi_get_handle(dev)) == NULL ||
1660 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
1663 if ((devinfo->Valid & ACPI_VALID_CID) == 0) {
1664 AcpiOsFree(devinfo);
1668 if (devinfo->CompatibleIdList.Count < count)
1669 count = devinfo->CompatibleIdList.Count;
1670 ids = devinfo->CompatibleIdList.Ids;
1671 for (i = 0, valid = 0; i < count; i++)
1672 if (ids[i].Length >= ACPI_EISAID_STRING_SIZE &&
1673 strncmp(ids[i].String, "PNP", 3) == 0) {
1674 *pnpid++ = PNP_EISAID(ids[i].String);
1677 AcpiOsFree(devinfo);
1679 return_VALUE (valid);
1683 acpi_device_id_probe(device_t bus, device_t dev, char **ids)
1689 h = acpi_get_handle(dev);
1690 if (ids == NULL || h == NULL)
1692 t = acpi_get_type(dev);
1693 if (t != ACPI_TYPE_DEVICE && t != ACPI_TYPE_PROCESSOR)
1696 /* Try to match one of the array of IDs with a HID or CID. */
1697 for (i = 0; ids[i] != NULL; i++) {
1698 if (acpi_MatchHid(h, ids[i]))
1705 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname,
1706 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret)
1711 h = ACPI_ROOT_OBJECT;
1712 else if ((h = acpi_get_handle(dev)) == NULL)
1713 return (AE_BAD_PARAMETER);
1714 return (AcpiEvaluateObject(h, pathname, parameters, ret));
1718 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate)
1720 struct acpi_softc *sc;
1725 handle = acpi_get_handle(dev);
1728 * XXX If we find these devices, don't try to power them down.
1729 * The serial and IRDA ports on my T23 hang the system when
1730 * set to D3 and it appears that such legacy devices may
1731 * need special handling in their drivers.
1733 if (dstate == NULL || handle == NULL ||
1734 acpi_MatchHid(handle, "PNP0500") ||
1735 acpi_MatchHid(handle, "PNP0501") ||
1736 acpi_MatchHid(handle, "PNP0502") ||
1737 acpi_MatchHid(handle, "PNP0510") ||
1738 acpi_MatchHid(handle, "PNP0511"))
1742 * Override next state with the value from _SxD, if present.
1743 * Note illegal _S0D is evaluated because some systems expect this.
1745 sc = device_get_softc(bus);
1746 snprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate);
1747 status = acpi_GetInteger(handle, sxd, dstate);
1748 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
1749 device_printf(dev, "failed to get %s on %s: %s\n", sxd,
1750 acpi_name(handle), AcpiFormatException(status));
1757 /* Callback arg for our implementation of walking the namespace. */
1758 struct acpi_device_scan_ctx {
1759 acpi_scan_cb_t user_fn;
1765 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval)
1767 struct acpi_device_scan_ctx *ctx;
1768 device_t dev, old_dev;
1770 ACPI_OBJECT_TYPE type;
1773 * Skip this device if we think we'll have trouble with it or it is
1774 * the parent where the scan began.
1776 ctx = (struct acpi_device_scan_ctx *)arg;
1777 if (acpi_avoid(h) || h == ctx->parent)
1780 /* If this is not a valid device type (e.g., a method), skip it. */
1781 if (ACPI_FAILURE(AcpiGetType(h, &type)))
1783 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR &&
1784 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER)
1788 * Call the user function with the current device. If it is unchanged
1789 * afterwards, return. Otherwise, we update the handle to the new dev.
1791 old_dev = acpi_get_device(h);
1793 status = ctx->user_fn(h, &dev, level, ctx->arg);
1794 if (ACPI_FAILURE(status) || old_dev == dev)
1797 /* Remove the old child and its connection to the handle. */
1798 if (old_dev != NULL)
1799 device_delete_child(device_get_parent(old_dev), old_dev);
1801 /* Recreate the handle association if the user created a device. */
1803 AcpiAttachData(h, acpi_fake_objhandler, dev);
1809 acpi_device_scan_children(device_t bus, device_t dev, int max_depth,
1810 acpi_scan_cb_t user_fn, void *arg)
1813 struct acpi_device_scan_ctx ctx;
1815 if (acpi_disabled("children"))
1819 h = ACPI_ROOT_OBJECT;
1820 else if ((h = acpi_get_handle(dev)) == NULL)
1821 return (AE_BAD_PARAMETER);
1822 ctx.user_fn = user_fn;
1825 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth,
1826 acpi_device_scan_cb, NULL, &ctx, NULL));
1830 * Even though ACPI devices are not PCI, we use the PCI approach for setting
1831 * device power states since it's close enough to ACPI.
1834 acpi_set_powerstate(device_t child, int state)
1839 h = acpi_get_handle(child);
1840 if (state < ACPI_STATE_D0 || state > ACPI_D_STATES_MAX)
1845 /* Ignore errors if the power methods aren't present. */
1846 status = acpi_pwr_switch_consumer(h, state);
1847 if (ACPI_SUCCESS(status)) {
1849 device_printf(child, "set ACPI power state D%d on %s\n",
1850 state, acpi_name(h));
1851 } else if (status != AE_NOT_FOUND)
1852 device_printf(child,
1853 "failed to set ACPI power state D%d on %s: %s\n", state,
1854 acpi_name(h), AcpiFormatException(status));
1860 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids)
1862 int result, cid_count, i;
1863 uint32_t lid, cids[8];
1865 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1868 * ISA-style drivers attached to ACPI may persist and
1869 * probe manually if we return ENOENT. We never want
1870 * that to happen, so don't ever return it.
1874 /* Scan the supplied IDs for a match */
1875 lid = acpi_isa_get_logicalid(child);
1876 cid_count = acpi_isa_get_compatid(child, cids, 8);
1877 while (ids && ids->ip_id) {
1878 if (lid == ids->ip_id) {
1882 for (i = 0; i < cid_count; i++) {
1883 if (cids[i] == ids->ip_id) {
1892 if (result == 0 && ids->ip_desc)
1893 device_set_desc(child, ids->ip_desc);
1895 return_VALUE (result);
1899 * Look for a MCFG table. If it is present, use the settings for
1900 * domain (segment) 0 to setup PCI config space access via the memory
1903 * On non-x86 architectures (arm64 for now), this will be done from the
1904 * PCI host bridge driver.
1907 acpi_enable_pcie(void)
1909 #if defined(__i386__) || defined(__amd64__)
1910 ACPI_TABLE_HEADER *hdr;
1911 ACPI_MCFG_ALLOCATION *alloc, *end;
1914 status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr);
1915 if (ACPI_FAILURE(status))
1918 end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length);
1919 alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1);
1920 while (alloc < end) {
1921 if (alloc->PciSegment == 0) {
1922 pcie_cfgregopen(alloc->Address, alloc->StartBusNumber,
1923 alloc->EndBusNumber);
1932 acpi_platform_osc(device_t dev)
1934 ACPI_HANDLE sb_handle;
1936 uint32_t cap_set[2];
1938 /* 0811B06E-4A27-44F9-8D60-3CBBC22E7B48 */
1939 static uint8_t acpi_platform_uuid[ACPI_UUID_LENGTH] = {
1940 0x6e, 0xb0, 0x11, 0x08, 0x27, 0x4a, 0xf9, 0x44,
1941 0x8d, 0x60, 0x3c, 0xbb, 0xc2, 0x2e, 0x7b, 0x48
1944 if (ACPI_FAILURE(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle)))
1947 cap_set[1] = 0x10; /* APEI Support */
1948 status = acpi_EvaluateOSC(sb_handle, acpi_platform_uuid, 1,
1949 nitems(cap_set), cap_set, cap_set, false);
1950 if (ACPI_FAILURE(status)) {
1951 if (status == AE_NOT_FOUND)
1953 device_printf(dev, "_OSC failed: %s\n",
1954 AcpiFormatException(status));
1960 * Scan all of the ACPI namespace and attach child devices.
1962 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and
1963 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec.
1964 * However, in violation of the spec, some systems place their PCI link
1965 * devices in \, so we have to walk the whole namespace. We check the
1966 * type of namespace nodes, so this should be ok.
1969 acpi_probe_children(device_t bus)
1972 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1975 * Scan the namespace and insert placeholders for all the devices that
1976 * we find. We also probe/attach any early devices.
1978 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because
1979 * we want to create nodes for all devices, not just those that are
1980 * currently present. (This assumes that we don't want to create/remove
1981 * devices as they appear, which might be smarter.)
1983 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n"));
1984 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, acpi_probe_child,
1987 /* Pre-allocate resources for our rman from any sysresource devices. */
1988 acpi_sysres_alloc(bus);
1990 /* Reserve resources already allocated to children. */
1991 acpi_reserve_resources(bus);
1993 /* Create any static children by calling device identify methods. */
1994 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n"));
1995 bus_generic_probe(bus);
1997 /* Probe/attach all children, created statically and from the namespace. */
1998 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "acpi bus_generic_attach\n"));
1999 bus_generic_attach(bus);
2001 /* Attach wake sysctls. */
2002 acpi_wake_sysctl_walk(bus);
2004 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n"));
2009 * Determine the probe order for a given device.
2012 acpi_probe_order(ACPI_HANDLE handle, int *order)
2014 ACPI_OBJECT_TYPE type;
2018 * 1. I/O port and memory system resource holders
2019 * 2. Clocks and timers (to handle early accesses)
2020 * 3. Embedded controllers (to handle early accesses)
2021 * 4. PCI Link Devices
2023 AcpiGetType(handle, &type);
2024 if (type == ACPI_TYPE_PROCESSOR)
2026 else if (acpi_MatchHid(handle, "PNP0C01") ||
2027 acpi_MatchHid(handle, "PNP0C02"))
2029 else if (acpi_MatchHid(handle, "PNP0100") ||
2030 acpi_MatchHid(handle, "PNP0103") ||
2031 acpi_MatchHid(handle, "PNP0B00"))
2033 else if (acpi_MatchHid(handle, "PNP0C09"))
2035 else if (acpi_MatchHid(handle, "PNP0C0F"))
2040 * Evaluate a child device and determine whether we might attach a device to
2044 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status)
2046 ACPI_DEVICE_INFO *devinfo;
2047 struct acpi_device *ad;
2048 struct acpi_prw_data prw;
2049 ACPI_OBJECT_TYPE type;
2051 device_t bus, child;
2055 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
2057 if (acpi_disabled("children"))
2058 return_ACPI_STATUS (AE_OK);
2060 /* Skip this device if we think we'll have trouble with it. */
2061 if (acpi_avoid(handle))
2062 return_ACPI_STATUS (AE_OK);
2064 bus = (device_t)context;
2065 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) {
2066 handle_str = acpi_name(handle);
2068 case ACPI_TYPE_DEVICE:
2070 * Since we scan from \, be sure to skip system scope objects.
2071 * \_SB_ and \_TZ_ are defined in ACPICA as devices to work around
2072 * BIOS bugs. For example, \_SB_ is to allow \_SB_._INI to be run
2073 * during the initialization and \_TZ_ is to support Notify() on it.
2075 if (strcmp(handle_str, "\\_SB_") == 0 ||
2076 strcmp(handle_str, "\\_TZ_") == 0)
2078 if (acpi_parse_prw(handle, &prw) == 0)
2079 AcpiSetupGpeForWake(handle, prw.gpe_handle, prw.gpe_bit);
2082 * Ignore devices that do not have a _HID or _CID. They should
2083 * be discovered by other buses (e.g. the PCI bus driver).
2085 if (!acpi_has_hid(handle))
2088 case ACPI_TYPE_PROCESSOR:
2089 case ACPI_TYPE_THERMAL:
2090 case ACPI_TYPE_POWER:
2092 * Create a placeholder device for this node. Sort the
2093 * placeholder so that the probe/attach passes will run
2094 * breadth-first. Orders less than ACPI_DEV_BASE_ORDER
2095 * are reserved for special objects (i.e., system
2098 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str));
2099 order = level * 10 + ACPI_DEV_BASE_ORDER;
2100 acpi_probe_order(handle, &order);
2101 child = BUS_ADD_CHILD(bus, order, NULL, -1);
2105 /* Associate the handle with the device_t and vice versa. */
2106 acpi_set_handle(child, handle);
2107 AcpiAttachData(handle, acpi_fake_objhandler, child);
2110 * Check that the device is present. If it's not present,
2111 * leave it disabled (so that we have a device_t attached to
2112 * the handle, but we don't probe it).
2114 * XXX PCI link devices sometimes report "present" but not
2115 * "functional" (i.e. if disabled). Go ahead and probe them
2116 * anyway since we may enable them later.
2118 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) {
2119 /* Never disable PCI link devices. */
2120 if (acpi_MatchHid(handle, "PNP0C0F"))
2123 * Docking stations should remain enabled since the system
2124 * may be undocked at boot.
2126 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h)))
2129 device_disable(child);
2134 * Get the device's resource settings and attach them.
2135 * Note that if the device has _PRS but no _CRS, we need
2136 * to decide when it's appropriate to try to configure the
2137 * device. Ignore the return value here; it's OK for the
2138 * device not to have any resources.
2140 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL);
2142 ad = device_get_ivars(child);
2143 ad->ad_cls_class = 0xffffff;
2144 if (ACPI_SUCCESS(AcpiGetObjectInfo(handle, &devinfo))) {
2145 if ((devinfo->Valid & ACPI_VALID_CLS) != 0 &&
2146 devinfo->ClassCode.Length >= ACPI_PCICLS_STRING_SIZE) {
2147 ad->ad_cls_class = strtoul(devinfo->ClassCode.String,
2150 AcpiOsFree(devinfo);
2156 return_ACPI_STATUS (AE_OK);
2160 * AcpiAttachData() requires an object handler but never uses it. This is a
2161 * placeholder object handler so we can store a device_t in an ACPI_HANDLE.
2164 acpi_fake_objhandler(ACPI_HANDLE h, void *data)
2169 acpi_shutdown_final(void *arg, int howto)
2171 struct acpi_softc *sc = (struct acpi_softc *)arg;
2176 * XXX Shutdown code should only run on the BSP (cpuid 0).
2177 * Some chipsets do not power off the system correctly if called from
2180 if ((howto & RB_POWEROFF) != 0) {
2181 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5);
2182 if (ACPI_FAILURE(status)) {
2183 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n",
2184 AcpiFormatException(status));
2187 device_printf(sc->acpi_dev, "Powering system off\n");
2188 intr = intr_disable();
2189 status = AcpiEnterSleepState(ACPI_STATE_S5);
2190 if (ACPI_FAILURE(status)) {
2192 device_printf(sc->acpi_dev, "power-off failed - %s\n",
2193 AcpiFormatException(status));
2197 device_printf(sc->acpi_dev, "power-off failed - timeout\n");
2199 } else if ((howto & RB_HALT) == 0 && sc->acpi_handle_reboot) {
2200 /* Reboot using the reset register. */
2201 status = AcpiReset();
2202 if (ACPI_SUCCESS(status)) {
2204 device_printf(sc->acpi_dev, "reset failed - timeout\n");
2205 } else if (status != AE_NOT_EXIST)
2206 device_printf(sc->acpi_dev, "reset failed - %s\n",
2207 AcpiFormatException(status));
2208 } else if (sc->acpi_do_disable && panicstr == NULL) {
2210 * Only disable ACPI if the user requested. On some systems, writing
2211 * the disable value to SMI_CMD hangs the system.
2213 device_printf(sc->acpi_dev, "Shutting down\n");
2219 acpi_enable_fixed_events(struct acpi_softc *sc)
2221 static int first_time = 1;
2223 /* Enable and clear fixed events and install handlers. */
2224 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) {
2225 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON);
2226 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON,
2227 acpi_event_power_button_sleep, sc);
2229 device_printf(sc->acpi_dev, "Power Button (fixed)\n");
2231 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) {
2232 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON);
2233 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON,
2234 acpi_event_sleep_button_sleep, sc);
2236 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n");
2243 * Returns true if the device is actually present and should
2244 * be attached to. This requires the present, enabled, UI-visible
2245 * and diagnostics-passed bits to be set.
2248 acpi_DeviceIsPresent(device_t dev)
2254 h = acpi_get_handle(dev);
2258 * Onboard serial ports on certain AMD motherboards have an invalid _STA
2259 * method that always returns 0. Force them to always be treated as present.
2261 * This may solely be a quirk of a preproduction BIOS.
2263 if (acpi_MatchHid(h, "AMDI0020") || acpi_MatchHid(h, "AMDI0010"))
2266 status = acpi_GetInteger(h, "_STA", &s);
2269 * If no _STA method or if it failed, then assume that
2270 * the device is present.
2272 if (ACPI_FAILURE(status))
2275 return (ACPI_DEVICE_PRESENT(s) ? TRUE : FALSE);
2279 * Returns true if the battery is actually present and inserted.
2282 acpi_BatteryIsPresent(device_t dev)
2288 h = acpi_get_handle(dev);
2291 status = acpi_GetInteger(h, "_STA", &s);
2294 * If no _STA method or if it failed, then assume that
2295 * the device is present.
2297 if (ACPI_FAILURE(status))
2300 return (ACPI_BATTERY_PRESENT(s) ? TRUE : FALSE);
2304 * Returns true if a device has at least one valid device ID.
2307 acpi_has_hid(ACPI_HANDLE h)
2309 ACPI_DEVICE_INFO *devinfo;
2313 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
2317 if ((devinfo->Valid & ACPI_VALID_HID) != 0)
2319 else if ((devinfo->Valid & ACPI_VALID_CID) != 0)
2320 if (devinfo->CompatibleIdList.Count > 0)
2323 AcpiOsFree(devinfo);
2328 * Match a HID string against a handle
2331 acpi_MatchHid(ACPI_HANDLE h, const char *hid)
2333 ACPI_DEVICE_INFO *devinfo;
2337 if (hid == NULL || h == NULL ||
2338 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
2342 if ((devinfo->Valid & ACPI_VALID_HID) != 0 &&
2343 strcmp(hid, devinfo->HardwareId.String) == 0)
2345 else if ((devinfo->Valid & ACPI_VALID_CID) != 0)
2346 for (i = 0; i < devinfo->CompatibleIdList.Count; i++) {
2347 if (strcmp(hid, devinfo->CompatibleIdList.Ids[i].String) == 0) {
2353 AcpiOsFree(devinfo);
2358 * Return the handle of a named object within our scope, ie. that of (parent)
2359 * or one if its parents.
2362 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result)
2367 /* Walk back up the tree to the root */
2369 status = AcpiGetHandle(parent, path, &r);
2370 if (ACPI_SUCCESS(status)) {
2374 /* XXX Return error here? */
2375 if (status != AE_NOT_FOUND)
2377 if (ACPI_FAILURE(AcpiGetParent(parent, &r)))
2378 return (AE_NOT_FOUND);
2384 * Allocate a buffer with a preset data size.
2387 acpi_AllocBuffer(int size)
2391 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL)
2394 buf->Pointer = (void *)(buf + 1);
2399 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number)
2402 ACPI_OBJECT_LIST args;
2404 arg1.Type = ACPI_TYPE_INTEGER;
2405 arg1.Integer.Value = number;
2407 args.Pointer = &arg1;
2409 return (AcpiEvaluateObject(handle, path, &args, NULL));
2413 * Evaluate a path that should return an integer.
2416 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number)
2423 handle = ACPI_ROOT_OBJECT;
2426 * Assume that what we've been pointed at is an Integer object, or
2427 * a method that will return an Integer.
2429 buf.Pointer = ¶m;
2430 buf.Length = sizeof(param);
2431 status = AcpiEvaluateObject(handle, path, NULL, &buf);
2432 if (ACPI_SUCCESS(status)) {
2433 if (param.Type == ACPI_TYPE_INTEGER)
2434 *number = param.Integer.Value;
2440 * In some applications, a method that's expected to return an Integer
2441 * may instead return a Buffer (probably to simplify some internal
2442 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer,
2443 * convert it into an Integer as best we can.
2447 if (status == AE_BUFFER_OVERFLOW) {
2448 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) {
2449 status = AE_NO_MEMORY;
2451 status = AcpiEvaluateObject(handle, path, NULL, &buf);
2452 if (ACPI_SUCCESS(status))
2453 status = acpi_ConvertBufferToInteger(&buf, number);
2454 AcpiOsFree(buf.Pointer);
2461 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number)
2467 p = (ACPI_OBJECT *)bufp->Pointer;
2468 if (p->Type == ACPI_TYPE_INTEGER) {
2469 *number = p->Integer.Value;
2472 if (p->Type != ACPI_TYPE_BUFFER)
2474 if (p->Buffer.Length > sizeof(int))
2475 return (AE_BAD_DATA);
2478 val = p->Buffer.Pointer;
2479 for (i = 0; i < p->Buffer.Length; i++)
2480 *number += val[i] << (i * 8);
2485 * Iterate over the elements of an a package object, calling the supplied
2486 * function for each element.
2488 * XXX possible enhancement might be to abort traversal on error.
2491 acpi_ForeachPackageObject(ACPI_OBJECT *pkg,
2492 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg)
2497 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE)
2498 return (AE_BAD_PARAMETER);
2500 /* Iterate over components */
2502 comp = pkg->Package.Elements;
2503 for (; i < pkg->Package.Count; i++, comp++)
2510 * Find the (index)th resource object in a set.
2513 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp)
2518 rp = (ACPI_RESOURCE *)buf->Pointer;
2522 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length))
2523 return (AE_BAD_PARAMETER);
2525 /* Check for terminator */
2526 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0)
2527 return (AE_NOT_FOUND);
2528 rp = ACPI_NEXT_RESOURCE(rp);
2537 * Append an ACPI_RESOURCE to an ACPI_BUFFER.
2539 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER
2540 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible
2541 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of
2544 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512
2547 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res)
2552 /* Initialise the buffer if necessary. */
2553 if (buf->Pointer == NULL) {
2554 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE;
2555 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL)
2556 return (AE_NO_MEMORY);
2557 rp = (ACPI_RESOURCE *)buf->Pointer;
2558 rp->Type = ACPI_RESOURCE_TYPE_END_TAG;
2559 rp->Length = ACPI_RS_SIZE_MIN;
2565 * Scan the current buffer looking for the terminator.
2566 * This will either find the terminator or hit the end
2567 * of the buffer and return an error.
2569 rp = (ACPI_RESOURCE *)buf->Pointer;
2571 /* Range check, don't go outside the buffer */
2572 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length))
2573 return (AE_BAD_PARAMETER);
2574 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0)
2576 rp = ACPI_NEXT_RESOURCE(rp);
2580 * Check the size of the buffer and expand if required.
2583 * size of existing resources before terminator +
2584 * size of new resource and header +
2585 * size of terminator.
2587 * Note that this loop should really only run once, unless
2588 * for some reason we are stuffing a *really* huge resource.
2590 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) +
2591 res->Length + ACPI_RS_SIZE_NO_DATA +
2592 ACPI_RS_SIZE_MIN) >= buf->Length) {
2593 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL)
2594 return (AE_NO_MEMORY);
2595 bcopy(buf->Pointer, newp, buf->Length);
2596 rp = (ACPI_RESOURCE *)((u_int8_t *)newp +
2597 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer));
2598 AcpiOsFree(buf->Pointer);
2599 buf->Pointer = newp;
2600 buf->Length += buf->Length;
2603 /* Insert the new resource. */
2604 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA);
2606 /* And add the terminator. */
2607 rp = ACPI_NEXT_RESOURCE(rp);
2608 rp->Type = ACPI_RESOURCE_TYPE_END_TAG;
2609 rp->Length = ACPI_RS_SIZE_MIN;
2615 acpi_DSMQuery(ACPI_HANDLE h, uint8_t *uuid, int revision)
2618 * ACPI spec 9.1.1 defines this.
2620 * "Arg2: Function Index Represents a specific function whose meaning is
2621 * specific to the UUID and Revision ID. Function indices should start
2622 * with 1. Function number zero is a query function (see the special
2623 * return code defined below)."
2629 if (!ACPI_SUCCESS(acpi_EvaluateDSM(h, uuid, revision, 0, NULL, &buf))) {
2630 ACPI_INFO(("Failed to enumerate DSM functions\n"));
2634 obj = (ACPI_OBJECT *)buf.Pointer;
2635 KASSERT(obj, ("Object not allowed to be NULL\n"));
2638 * From ACPI 6.2 spec 9.1.1:
2639 * If Function Index = 0, a Buffer containing a function index bitfield.
2640 * Otherwise, the return value and type depends on the UUID and revision
2643 switch (obj->Type) {
2644 case ACPI_TYPE_BUFFER:
2645 ret = *(uint8_t *)obj->Buffer.Pointer;
2647 case ACPI_TYPE_INTEGER:
2648 ACPI_BIOS_WARNING((AE_INFO,
2649 "Possibly buggy BIOS with ACPI_TYPE_INTEGER for function enumeration\n"));
2650 ret = obj->Integer.Value & 0xFF;
2653 ACPI_WARNING((AE_INFO, "Unexpected return type %u\n", obj->Type));
2661 * DSM may return multiple types depending on the function. It is therefore
2662 * unsafe to use the typed evaluation. It is highly recommended that the caller
2663 * check the type of the returned object.
2666 acpi_EvaluateDSM(ACPI_HANDLE handle, uint8_t *uuid, int revision,
2667 uint64_t function, union acpi_object *package, ACPI_BUFFER *out_buf)
2670 ACPI_OBJECT_LIST arglist;
2674 if (out_buf == NULL)
2675 return (AE_NO_MEMORY);
2677 arg[0].Type = ACPI_TYPE_BUFFER;
2678 arg[0].Buffer.Length = ACPI_UUID_LENGTH;
2679 arg[0].Buffer.Pointer = uuid;
2680 arg[1].Type = ACPI_TYPE_INTEGER;
2681 arg[1].Integer.Value = revision;
2682 arg[2].Type = ACPI_TYPE_INTEGER;
2683 arg[2].Integer.Value = function;
2687 arg[3].Type = ACPI_TYPE_PACKAGE;
2688 arg[3].Package.Count = 0;
2689 arg[3].Package.Elements = NULL;
2692 arglist.Pointer = arg;
2695 buf.Length = ACPI_ALLOCATE_BUFFER;
2696 status = AcpiEvaluateObject(handle, "_DSM", &arglist, &buf);
2697 if (ACPI_FAILURE(status))
2700 KASSERT(ACPI_SUCCESS(status), ("Unexpected status"));
2707 acpi_EvaluateOSC(ACPI_HANDLE handle, uint8_t *uuid, int revision, int count,
2708 uint32_t *caps_in, uint32_t *caps_out, bool query)
2710 ACPI_OBJECT arg[4], *ret;
2711 ACPI_OBJECT_LIST arglist;
2715 arglist.Pointer = arg;
2717 arg[0].Type = ACPI_TYPE_BUFFER;
2718 arg[0].Buffer.Length = ACPI_UUID_LENGTH;
2719 arg[0].Buffer.Pointer = uuid;
2720 arg[1].Type = ACPI_TYPE_INTEGER;
2721 arg[1].Integer.Value = revision;
2722 arg[2].Type = ACPI_TYPE_INTEGER;
2723 arg[2].Integer.Value = count;
2724 arg[3].Type = ACPI_TYPE_BUFFER;
2725 arg[3].Buffer.Length = count * sizeof(*caps_in);
2726 arg[3].Buffer.Pointer = (uint8_t *)caps_in;
2727 caps_in[0] = query ? 1 : 0;
2729 buf.Length = ACPI_ALLOCATE_BUFFER;
2730 status = AcpiEvaluateObjectTyped(handle, "_OSC", &arglist, &buf,
2732 if (ACPI_FAILURE(status))
2734 if (caps_out != NULL) {
2736 if (ret->Buffer.Length != count * sizeof(*caps_out)) {
2737 AcpiOsFree(buf.Pointer);
2738 return (AE_BUFFER_OVERFLOW);
2740 bcopy(ret->Buffer.Pointer, caps_out, ret->Buffer.Length);
2742 AcpiOsFree(buf.Pointer);
2747 * Set interrupt model.
2750 acpi_SetIntrModel(int model)
2753 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model));
2757 * Walk subtables of a table and call a callback routine for each
2758 * subtable. The caller should provide the first subtable and a
2759 * pointer to the end of the table. This can be used to walk tables
2760 * such as MADT and SRAT that use subtable entries.
2763 acpi_walk_subtables(void *first, void *end, acpi_subtable_handler *handler,
2766 ACPI_SUBTABLE_HEADER *entry;
2768 for (entry = first; (void *)entry < end; ) {
2769 /* Avoid an infinite loop if we hit a bogus entry. */
2770 if (entry->Length < sizeof(ACPI_SUBTABLE_HEADER))
2773 handler(entry, arg);
2774 entry = ACPI_ADD_PTR(ACPI_SUBTABLE_HEADER, entry, entry->Length);
2779 * DEPRECATED. This interface has serious deficiencies and will be
2782 * Immediately enter the sleep state. In the old model, acpiconf(8) ran
2783 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this.
2786 acpi_SetSleepState(struct acpi_softc *sc, int state)
2791 device_printf(sc->acpi_dev,
2792 "warning: acpi_SetSleepState() deprecated, need to update your software\n");
2795 return (acpi_EnterSleepState(sc, state));
2798 #if defined(__amd64__) || defined(__i386__)
2800 acpi_sleep_force_task(void *context)
2802 struct acpi_softc *sc = (struct acpi_softc *)context;
2804 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate)))
2805 device_printf(sc->acpi_dev, "force sleep state S%d failed\n",
2806 sc->acpi_next_sstate);
2810 acpi_sleep_force(void *arg)
2812 struct acpi_softc *sc = (struct acpi_softc *)arg;
2814 device_printf(sc->acpi_dev,
2815 "suspend request timed out, forcing sleep now\n");
2817 * XXX Suspending from callout causes freezes in DEVICE_SUSPEND().
2818 * Suspend from acpi_task thread instead.
2820 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER,
2821 acpi_sleep_force_task, sc)))
2822 device_printf(sc->acpi_dev, "AcpiOsExecute() for sleeping failed\n");
2827 * Request that the system enter the given suspend state. All /dev/apm
2828 * devices and devd(8) will be notified. Userland then has a chance to
2829 * save state and acknowledge the request. The system sleeps once all
2833 acpi_ReqSleepState(struct acpi_softc *sc, int state)
2835 #if defined(__amd64__) || defined(__i386__)
2836 struct apm_clone_data *clone;
2839 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX)
2841 if (!acpi_sleep_states[state])
2842 return (EOPNOTSUPP);
2845 * If a reboot/shutdown/suspend request is already in progress or
2846 * suspend is blocked due to an upcoming shutdown, just return.
2848 if (rebooting || sc->acpi_next_sstate != 0 || suspend_blocked) {
2852 /* Wait until sleep is enabled. */
2853 while (sc->acpi_sleep_disabled) {
2859 sc->acpi_next_sstate = state;
2861 /* S5 (soft-off) should be entered directly with no waiting. */
2862 if (state == ACPI_STATE_S5) {
2864 status = acpi_EnterSleepState(sc, state);
2865 return (ACPI_SUCCESS(status) ? 0 : ENXIO);
2868 /* Record the pending state and notify all apm devices. */
2869 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) {
2870 clone->notify_status = APM_EV_NONE;
2871 if ((clone->flags & ACPI_EVF_DEVD) == 0) {
2872 selwakeuppri(&clone->sel_read, PZERO);
2873 KNOTE_LOCKED(&clone->sel_read.si_note, 0);
2877 /* If devd(8) is not running, immediately enter the sleep state. */
2878 if (!devctl_process_running()) {
2880 status = acpi_EnterSleepState(sc, state);
2881 return (ACPI_SUCCESS(status) ? 0 : ENXIO);
2885 * Set a timeout to fire if userland doesn't ack the suspend request
2886 * in time. This way we still eventually go to sleep if we were
2887 * overheating or running low on battery, even if userland is hung.
2888 * We cancel this timeout once all userland acks are in or the
2889 * suspend request is aborted.
2891 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc);
2894 /* Now notify devd(8) also. */
2895 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state);
2899 /* This platform does not support acpi suspend/resume. */
2900 return (EOPNOTSUPP);
2905 * Acknowledge (or reject) a pending sleep state. The caller has
2906 * prepared for suspend and is now ready for it to proceed. If the
2907 * error argument is non-zero, it indicates suspend should be cancelled
2908 * and gives an errno value describing why. Once all votes are in,
2909 * we suspend the system.
2912 acpi_AckSleepState(struct apm_clone_data *clone, int error)
2914 #if defined(__amd64__) || defined(__i386__)
2915 struct acpi_softc *sc;
2918 /* If no pending sleep state, return an error. */
2920 sc = clone->acpi_sc;
2921 if (sc->acpi_next_sstate == 0) {
2926 /* Caller wants to abort suspend process. */
2928 sc->acpi_next_sstate = 0;
2929 callout_stop(&sc->susp_force_to);
2930 device_printf(sc->acpi_dev,
2931 "listener on %s cancelled the pending suspend\n",
2932 devtoname(clone->cdev));
2938 * Mark this device as acking the suspend request. Then, walk through
2939 * all devices, seeing if they agree yet. We only count devices that
2940 * are writable since read-only devices couldn't ack the request.
2943 clone->notify_status = APM_EV_ACKED;
2944 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) {
2945 if ((clone->flags & ACPI_EVF_WRITE) != 0 &&
2946 clone->notify_status != APM_EV_ACKED) {
2952 /* If all devices have voted "yes", we will suspend now. */
2954 callout_stop(&sc->susp_force_to);
2958 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate)))
2963 /* This platform does not support acpi suspend/resume. */
2964 return (EOPNOTSUPP);
2969 acpi_sleep_enable(void *arg)
2971 struct acpi_softc *sc = (struct acpi_softc *)arg;
2973 ACPI_LOCK_ASSERT(acpi);
2975 /* Reschedule if the system is not fully up and running. */
2976 if (!AcpiGbl_SystemAwakeAndRunning) {
2977 callout_schedule(&acpi_sleep_timer, hz * ACPI_MINIMUM_AWAKETIME);
2981 sc->acpi_sleep_disabled = FALSE;
2985 acpi_sleep_disable(struct acpi_softc *sc)
2989 /* Fail if the system is not fully up and running. */
2990 if (!AcpiGbl_SystemAwakeAndRunning)
2994 status = sc->acpi_sleep_disabled ? AE_ERROR : AE_OK;
2995 sc->acpi_sleep_disabled = TRUE;
3001 enum acpi_sleep_state {
3004 ACPI_SS_DEV_SUSPEND,
3010 * Enter the desired system sleep state.
3012 * Currently we support S1-S5 but S4 is only S4BIOS
3015 acpi_EnterSleepState(struct acpi_softc *sc, int state)
3019 ACPI_EVENT_STATUS power_button_status;
3020 enum acpi_sleep_state slp_state;
3023 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
3025 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX)
3026 return_ACPI_STATUS (AE_BAD_PARAMETER);
3027 if (!acpi_sleep_states[state]) {
3028 device_printf(sc->acpi_dev, "Sleep state S%d not supported by BIOS\n",
3030 return (AE_SUPPORT);
3033 /* Re-entry once we're suspending is not allowed. */
3034 status = acpi_sleep_disable(sc);
3035 if (ACPI_FAILURE(status)) {
3036 device_printf(sc->acpi_dev,
3037 "suspend request ignored (not ready yet)\n");
3041 if (state == ACPI_STATE_S5) {
3043 * Shut down cleanly and power off. This will call us back through the
3044 * shutdown handlers.
3046 shutdown_nice(RB_POWEROFF);
3047 return_ACPI_STATUS (AE_OK);
3050 EVENTHANDLER_INVOKE(power_suspend_early);
3053 EVENTHANDLER_INVOKE(power_suspend);
3055 #ifdef EARLY_AP_STARTUP
3056 MPASS(mp_ncpus == 1 || smp_started);
3057 thread_lock(curthread);
3058 sched_bind(curthread, 0);
3059 thread_unlock(curthread);
3062 thread_lock(curthread);
3063 sched_bind(curthread, 0);
3064 thread_unlock(curthread);
3069 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE
3070 * drivers need this.
3074 slp_state = ACPI_SS_NONE;
3076 sc->acpi_sstate = state;
3078 /* Enable any GPEs as appropriate and requested by the user. */
3079 acpi_wake_prep_walk(state);
3080 slp_state = ACPI_SS_GPE_SET;
3083 * Inform all devices that we are going to sleep. If at least one
3084 * device fails, DEVICE_SUSPEND() automatically resumes the tree.
3086 * XXX Note that a better two-pass approach with a 'veto' pass
3087 * followed by a "real thing" pass would be better, but the current
3088 * bus interface does not provide for this.
3090 if (DEVICE_SUSPEND(root_bus) != 0) {
3091 device_printf(sc->acpi_dev, "device_suspend failed\n");
3094 slp_state = ACPI_SS_DEV_SUSPEND;
3096 status = AcpiEnterSleepStatePrep(state);
3097 if (ACPI_FAILURE(status)) {
3098 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n",
3099 AcpiFormatException(status));
3102 slp_state = ACPI_SS_SLP_PREP;
3104 if (sc->acpi_sleep_delay > 0)
3105 DELAY(sc->acpi_sleep_delay * 1000000);
3108 intr = intr_disable();
3109 if (state != ACPI_STATE_S1) {
3110 sleep_result = acpi_sleep_machdep(sc, state);
3111 acpi_wakeup_machdep(sc, state, sleep_result, 0);
3114 * XXX According to ACPI specification SCI_EN bit should be restored
3115 * by ACPI platform (BIOS, firmware) to its pre-sleep state.
3116 * Unfortunately some BIOSes fail to do that and that leads to
3117 * unexpected and serious consequences during wake up like a system
3118 * getting stuck in SMI handlers.
3119 * This hack is picked up from Linux, which claims that it follows
3122 if (sleep_result == 1 && state != ACPI_STATE_S4)
3123 AcpiWriteBitRegister(ACPI_BITREG_SCI_ENABLE, ACPI_ENABLE_EVENT);
3125 if (sleep_result == 1 && state == ACPI_STATE_S3) {
3127 * Prevent mis-interpretation of the wakeup by power button
3128 * as a request for power off.
3129 * Ideally we should post an appropriate wakeup event,
3130 * perhaps using acpi_event_power_button_wake or alike.
3132 * Clearing of power button status after wakeup is mandated
3133 * by ACPI specification in section "Fixed Power Button".
3135 * XXX As of ACPICA 20121114 AcpiGetEventStatus provides
3136 * status as 0/1 corressponding to inactive/active despite
3137 * its type being ACPI_EVENT_STATUS. In other words,
3138 * we should not test for ACPI_EVENT_FLAG_SET for time being.
3140 if (ACPI_SUCCESS(AcpiGetEventStatus(ACPI_EVENT_POWER_BUTTON,
3141 &power_button_status)) && power_button_status != 0) {
3142 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON);
3143 device_printf(sc->acpi_dev,
3144 "cleared fixed power button status\n");
3150 /* call acpi_wakeup_machdep() again with interrupt enabled */
3151 acpi_wakeup_machdep(sc, state, sleep_result, 1);
3153 AcpiLeaveSleepStatePrep(state);
3155 if (sleep_result == -1)
3158 /* Re-enable ACPI hardware on wakeup from sleep state 4. */
3159 if (state == ACPI_STATE_S4)
3162 status = AcpiEnterSleepState(state);
3164 AcpiLeaveSleepStatePrep(state);
3165 if (ACPI_FAILURE(status)) {
3166 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n",
3167 AcpiFormatException(status));
3171 slp_state = ACPI_SS_SLEPT;
3174 * Back out state according to how far along we got in the suspend
3175 * process. This handles both the error and success cases.
3178 if (slp_state >= ACPI_SS_SLP_PREP)
3180 if (slp_state >= ACPI_SS_GPE_SET) {
3181 acpi_wake_prep_walk(state);
3182 sc->acpi_sstate = ACPI_STATE_S0;
3184 if (slp_state >= ACPI_SS_DEV_SUSPEND)
3185 DEVICE_RESUME(root_bus);
3186 if (slp_state >= ACPI_SS_SLP_PREP)
3187 AcpiLeaveSleepState(state);
3188 if (slp_state >= ACPI_SS_SLEPT) {
3189 #if defined(__i386__) || defined(__amd64__)
3190 /* NB: we are still using ACPI timecounter at this point. */
3193 acpi_resync_clock(sc);
3194 acpi_enable_fixed_events(sc);
3196 sc->acpi_next_sstate = 0;
3200 #ifdef EARLY_AP_STARTUP
3201 thread_lock(curthread);
3202 sched_unbind(curthread);
3203 thread_unlock(curthread);
3206 thread_lock(curthread);
3207 sched_unbind(curthread);
3208 thread_unlock(curthread);
3215 EVENTHANDLER_INVOKE(power_resume);
3217 /* Allow another sleep request after a while. */
3218 callout_schedule(&acpi_sleep_timer, hz * ACPI_MINIMUM_AWAKETIME);
3220 /* Run /etc/rc.resume after we are back. */
3221 if (devctl_process_running())
3222 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state);
3224 return_ACPI_STATUS (status);
3228 acpi_resync_clock(struct acpi_softc *sc)
3232 * Warm up timecounter again and reset system clock.
3234 (void)timecounter->tc_get_timecount(timecounter);
3235 inittodr(time_second + sc->acpi_sleep_delay);
3238 /* Enable or disable the device's wake GPE. */
3240 acpi_wake_set_enable(device_t dev, int enable)
3242 struct acpi_prw_data prw;
3246 /* Make sure the device supports waking the system and get the GPE. */
3247 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0)
3250 flags = acpi_get_flags(dev);
3252 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit,
3254 if (ACPI_FAILURE(status)) {
3255 device_printf(dev, "enable wake failed\n");
3258 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED);
3260 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit,
3262 if (ACPI_FAILURE(status)) {
3263 device_printf(dev, "disable wake failed\n");
3266 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED);
3273 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate)
3275 struct acpi_prw_data prw;
3278 /* Check that this is a wake-capable device and get its GPE. */
3279 if (acpi_parse_prw(handle, &prw) != 0)
3281 dev = acpi_get_device(handle);
3284 * The destination sleep state must be less than (i.e., higher power)
3285 * or equal to the value specified by _PRW. If this GPE cannot be
3286 * enabled for the next sleep state, then disable it. If it can and
3287 * the user requested it be enabled, turn on any required power resources
3290 if (sstate > prw.lowest_wake) {
3291 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_DISABLE);
3293 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n",
3294 acpi_name(handle), sstate);
3295 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) {
3296 acpi_pwr_wake_enable(handle, 1);
3297 acpi_SetInteger(handle, "_PSW", 1);
3299 device_printf(dev, "wake_prep enabled for %s (S%d)\n",
3300 acpi_name(handle), sstate);
3307 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate)
3309 struct acpi_prw_data prw;
3313 * Check that this is a wake-capable device and get its GPE. Return
3314 * now if the user didn't enable this device for wake.
3316 if (acpi_parse_prw(handle, &prw) != 0)
3318 dev = acpi_get_device(handle);
3319 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0)
3323 * If this GPE couldn't be enabled for the previous sleep state, it was
3324 * disabled before going to sleep so re-enable it. If it was enabled,
3325 * clear _PSW and turn off any power resources it used.
3327 if (sstate > prw.lowest_wake) {
3328 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_ENABLE);
3330 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle));
3332 acpi_SetInteger(handle, "_PSW", 0);
3333 acpi_pwr_wake_enable(handle, 0);
3335 device_printf(dev, "run_prep cleaned up for %s\n",
3343 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status)
3347 /* If suspending, run the sleep prep function, otherwise wake. */
3348 sstate = *(int *)context;
3349 if (AcpiGbl_SystemAwakeAndRunning)
3350 acpi_wake_sleep_prep(handle, sstate);
3352 acpi_wake_run_prep(handle, sstate);
3356 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */
3358 acpi_wake_prep_walk(int sstate)
3360 ACPI_HANDLE sb_handle;
3362 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle)))
3363 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100,
3364 acpi_wake_prep, NULL, &sstate, NULL);
3368 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */
3370 acpi_wake_sysctl_walk(device_t dev)
3372 int error, i, numdevs;
3377 error = device_get_children(dev, &devlist, &numdevs);
3378 if (error != 0 || numdevs == 0) {
3380 free(devlist, M_TEMP);
3383 for (i = 0; i < numdevs; i++) {
3385 acpi_wake_sysctl_walk(child);
3386 if (!device_is_attached(child))
3388 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL);
3389 if (ACPI_SUCCESS(status)) {
3390 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child),
3391 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO,
3392 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0,
3393 acpi_wake_set_sysctl, "I", "Device set to wake the system");
3396 free(devlist, M_TEMP);
3401 /* Enable or disable wake from userland. */
3403 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS)
3408 dev = (device_t)arg1;
3409 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0;
3411 error = sysctl_handle_int(oidp, &enable, 0, req);
3412 if (error != 0 || req->newptr == NULL)
3414 if (enable != 0 && enable != 1)
3417 return (acpi_wake_set_enable(dev, enable));
3420 /* Parse a device's _PRW into a structure. */
3422 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw)
3425 ACPI_BUFFER prw_buffer;
3426 ACPI_OBJECT *res, *res2;
3427 int error, i, power_count;
3429 if (h == NULL || prw == NULL)
3433 * The _PRW object (7.2.9) is only required for devices that have the
3434 * ability to wake the system from a sleeping state.
3437 prw_buffer.Pointer = NULL;
3438 prw_buffer.Length = ACPI_ALLOCATE_BUFFER;
3439 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer);
3440 if (ACPI_FAILURE(status))
3442 res = (ACPI_OBJECT *)prw_buffer.Pointer;
3445 if (!ACPI_PKG_VALID(res, 2))
3449 * Element 1 of the _PRW object:
3450 * The lowest power system sleeping state that can be entered while still
3451 * providing wake functionality. The sleeping state being entered must
3452 * be less than (i.e., higher power) or equal to this value.
3454 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0)
3458 * Element 0 of the _PRW object:
3460 switch (res->Package.Elements[0].Type) {
3461 case ACPI_TYPE_INTEGER:
3463 * If the data type of this package element is numeric, then this
3464 * _PRW package element is the bit index in the GPEx_EN, in the
3465 * GPE blocks described in the FADT, of the enable bit that is
3466 * enabled for the wake event.
3468 prw->gpe_handle = NULL;
3469 prw->gpe_bit = res->Package.Elements[0].Integer.Value;
3472 case ACPI_TYPE_PACKAGE:
3474 * If the data type of this package element is a package, then this
3475 * _PRW package element is itself a package containing two
3476 * elements. The first is an object reference to the GPE Block
3477 * device that contains the GPE that will be triggered by the wake
3478 * event. The second element is numeric and it contains the bit
3479 * index in the GPEx_EN, in the GPE Block referenced by the
3480 * first element in the package, of the enable bit that is enabled for
3483 * For example, if this field is a package then it is of the form:
3484 * Package() {\_SB.PCI0.ISA.GPE, 2}
3486 res2 = &res->Package.Elements[0];
3487 if (!ACPI_PKG_VALID(res2, 2))
3489 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]);
3490 if (prw->gpe_handle == NULL)
3492 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0)
3500 /* Elements 2 to N of the _PRW object are power resources. */
3501 power_count = res->Package.Count - 2;
3502 if (power_count > ACPI_PRW_MAX_POWERRES) {
3503 printf("ACPI device %s has too many power resources\n", acpi_name(h));
3506 prw->power_res_count = power_count;
3507 for (i = 0; i < power_count; i++)
3508 prw->power_res[i] = res->Package.Elements[i];
3511 if (prw_buffer.Pointer != NULL)
3512 AcpiOsFree(prw_buffer.Pointer);
3517 * ACPI Event Handlers
3520 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */
3523 acpi_system_eventhandler_sleep(void *arg, int state)
3525 struct acpi_softc *sc = (struct acpi_softc *)arg;
3528 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
3530 /* Check if button action is disabled or unknown. */
3531 if (state == ACPI_STATE_UNKNOWN)
3534 /* Request that the system prepare to enter the given suspend state. */
3535 ret = acpi_ReqSleepState(sc, state);
3537 device_printf(sc->acpi_dev,
3538 "request to enter state S%d failed (err %d)\n", state, ret);
3544 acpi_system_eventhandler_wakeup(void *arg, int state)
3547 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
3549 /* Currently, nothing to do for wakeup. */
3555 * ACPICA Event Handlers (FixedEvent, also called from button notify handler)
3558 acpi_invoke_sleep_eventhandler(void *context)
3561 EVENTHANDLER_INVOKE(acpi_sleep_event, *(int *)context);
3565 acpi_invoke_wake_eventhandler(void *context)
3568 EVENTHANDLER_INVOKE(acpi_wakeup_event, *(int *)context);
3572 acpi_event_power_button_sleep(void *context)
3574 struct acpi_softc *sc = (struct acpi_softc *)context;
3576 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
3578 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER,
3579 acpi_invoke_sleep_eventhandler, &sc->acpi_power_button_sx)))
3580 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
3581 return_VALUE (ACPI_INTERRUPT_HANDLED);
3585 acpi_event_power_button_wake(void *context)
3587 struct acpi_softc *sc = (struct acpi_softc *)context;
3589 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
3591 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER,
3592 acpi_invoke_wake_eventhandler, &sc->acpi_power_button_sx)))
3593 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
3594 return_VALUE (ACPI_INTERRUPT_HANDLED);
3598 acpi_event_sleep_button_sleep(void *context)
3600 struct acpi_softc *sc = (struct acpi_softc *)context;
3602 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
3604 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER,
3605 acpi_invoke_sleep_eventhandler, &sc->acpi_sleep_button_sx)))
3606 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
3607 return_VALUE (ACPI_INTERRUPT_HANDLED);
3611 acpi_event_sleep_button_wake(void *context)
3613 struct acpi_softc *sc = (struct acpi_softc *)context;
3615 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
3617 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER,
3618 acpi_invoke_wake_eventhandler, &sc->acpi_sleep_button_sx)))
3619 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
3620 return_VALUE (ACPI_INTERRUPT_HANDLED);
3624 * XXX This static buffer is suboptimal. There is no locking so only
3625 * use this for single-threaded callers.
3628 acpi_name(ACPI_HANDLE handle)
3631 static char data[256];
3633 buf.Length = sizeof(data);
3636 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf)))
3638 return ("(unknown)");
3642 * Debugging/bug-avoidance. Avoid trying to fetch info on various
3643 * parts of the namespace.
3646 acpi_avoid(ACPI_HANDLE handle)
3648 char *cp, *env, *np;
3651 np = acpi_name(handle);
3654 if ((env = kern_getenv("debug.acpi.avoid")) == NULL)
3657 /* Scan the avoid list checking for a match */
3660 while (*cp != 0 && isspace(*cp))
3665 while (cp[len] != 0 && !isspace(cp[len]))
3667 if (!strncmp(cp, np, len)) {
3679 * Debugging/bug-avoidance. Disable ACPI subsystem components.
3682 acpi_disabled(char *subsys)
3687 if ((env = kern_getenv("debug.acpi.disabled")) == NULL)
3689 if (strcmp(env, "all") == 0) {
3694 /* Scan the disable list, checking for a match. */
3697 while (*cp != '\0' && isspace(*cp))
3702 while (cp[len] != '\0' && !isspace(cp[len]))
3704 if (strncmp(cp, subsys, len) == 0) {
3716 acpi_lookup(void *arg, const char *name, device_t *dev)
3724 * Allow any handle name that is specified as an absolute path and
3725 * starts with '\'. We could restrict this to \_SB and friends,
3726 * but see acpi_probe_children() for notes on why we scan the entire
3727 * namespace for devices.
3729 * XXX: The pathname argument to AcpiGetHandle() should be fixed to
3732 if (name[0] != '\\')
3734 if (ACPI_FAILURE(AcpiGetHandle(ACPI_ROOT_OBJECT, __DECONST(char *, name),
3737 *dev = acpi_get_device(handle);
3741 * Control interface.
3743 * We multiplex ioctls for all participating ACPI devices here. Individual
3744 * drivers wanting to be accessible via /dev/acpi should use the
3745 * register/deregister interface to make their handlers visible.
3747 struct acpi_ioctl_hook
3749 TAILQ_ENTRY(acpi_ioctl_hook) link;
3755 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks;
3756 static int acpi_ioctl_hooks_initted;
3759 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg)
3761 struct acpi_ioctl_hook *hp;
3763 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL)
3770 if (acpi_ioctl_hooks_initted == 0) {
3771 TAILQ_INIT(&acpi_ioctl_hooks);
3772 acpi_ioctl_hooks_initted = 1;
3774 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link);
3781 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn)
3783 struct acpi_ioctl_hook *hp;
3786 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link)
3787 if (hp->cmd == cmd && hp->fn == fn)
3791 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link);
3792 free(hp, M_ACPIDEV);
3798 acpiopen(struct cdev *dev, int flag, int fmt, struct thread *td)
3804 acpiclose(struct cdev *dev, int flag, int fmt, struct thread *td)
3810 acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
3812 struct acpi_softc *sc;
3813 struct acpi_ioctl_hook *hp;
3821 * Scan the list of registered ioctls, looking for handlers.
3824 if (acpi_ioctl_hooks_initted)
3825 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) {
3831 return (hp->fn(cmd, addr, hp->arg));
3834 * Core ioctls are not permitted for non-writable user.
3835 * Currently, other ioctls just fetch information.
3836 * Not changing system behavior.
3838 if ((flag & FWRITE) == 0)
3841 /* Core system ioctls. */
3843 case ACPIIO_REQSLPSTATE:
3844 state = *(int *)addr;
3845 if (state != ACPI_STATE_S5)
3846 return (acpi_ReqSleepState(sc, state));
3847 device_printf(sc->acpi_dev, "power off via acpi ioctl not supported\n");
3850 case ACPIIO_ACKSLPSTATE:
3851 error = *(int *)addr;
3852 error = acpi_AckSleepState(sc->acpi_clone, error);
3854 case ACPIIO_SETSLPSTATE: /* DEPRECATED */
3855 state = *(int *)addr;
3856 if (state < ACPI_STATE_S0 || state > ACPI_S_STATES_MAX)
3858 if (!acpi_sleep_states[state])
3859 return (EOPNOTSUPP);
3860 if (ACPI_FAILURE(acpi_SetSleepState(sc, state)))
3872 acpi_sname2sstate(const char *sname)
3876 if (toupper(sname[0]) == 'S') {
3877 sstate = sname[1] - '0';
3878 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5 &&
3881 } else if (strcasecmp(sname, "NONE") == 0)
3882 return (ACPI_STATE_UNKNOWN);
3887 acpi_sstate2sname(int sstate)
3889 static const char *snames[] = { "S0", "S1", "S2", "S3", "S4", "S5" };
3891 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5)
3892 return (snames[sstate]);
3893 else if (sstate == ACPI_STATE_UNKNOWN)
3899 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
3905 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND);
3906 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++)
3907 if (acpi_sleep_states[state])
3908 sbuf_printf(&sb, "%s ", acpi_sstate2sname(state));
3911 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req);
3917 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
3919 char sleep_state[10];
3920 int error, new_state, old_state;
3922 old_state = *(int *)oidp->oid_arg1;
3923 strlcpy(sleep_state, acpi_sstate2sname(old_state), sizeof(sleep_state));
3924 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req);
3925 if (error == 0 && req->newptr != NULL) {
3926 new_state = acpi_sname2sstate(sleep_state);
3927 if (new_state < ACPI_STATE_S1)
3929 if (new_state < ACPI_S_STATE_COUNT && !acpi_sleep_states[new_state])
3930 return (EOPNOTSUPP);
3931 if (new_state != old_state)
3932 *(int *)oidp->oid_arg1 = new_state;
3937 /* Inform devctl(4) when we receive a Notify. */
3939 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify)
3941 char notify_buf[16];
3942 ACPI_BUFFER handle_buf;
3945 if (subsystem == NULL)
3948 handle_buf.Pointer = NULL;
3949 handle_buf.Length = ACPI_ALLOCATE_BUFFER;
3950 status = AcpiNsHandleToPathname(h, &handle_buf, FALSE);
3951 if (ACPI_FAILURE(status))
3953 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify);
3954 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf);
3955 AcpiOsFree(handle_buf.Pointer);
3960 * Support for parsing debug options from the kernel environment.
3962 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers
3963 * by specifying the names of the bits in the debug.acpi.layer and
3964 * debug.acpi.level environment variables. Bits may be unset by
3965 * prefixing the bit name with !.
3973 static struct debugtag dbg_layer[] = {
3974 {"ACPI_UTILITIES", ACPI_UTILITIES},
3975 {"ACPI_HARDWARE", ACPI_HARDWARE},
3976 {"ACPI_EVENTS", ACPI_EVENTS},
3977 {"ACPI_TABLES", ACPI_TABLES},
3978 {"ACPI_NAMESPACE", ACPI_NAMESPACE},
3979 {"ACPI_PARSER", ACPI_PARSER},
3980 {"ACPI_DISPATCHER", ACPI_DISPATCHER},
3981 {"ACPI_EXECUTER", ACPI_EXECUTER},
3982 {"ACPI_RESOURCES", ACPI_RESOURCES},
3983 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER},
3984 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES},
3985 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER},
3986 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS},
3988 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER},
3989 {"ACPI_BATTERY", ACPI_BATTERY},
3990 {"ACPI_BUS", ACPI_BUS},
3991 {"ACPI_BUTTON", ACPI_BUTTON},
3992 {"ACPI_EC", ACPI_EC},
3993 {"ACPI_FAN", ACPI_FAN},
3994 {"ACPI_POWERRES", ACPI_POWERRES},
3995 {"ACPI_PROCESSOR", ACPI_PROCESSOR},
3996 {"ACPI_THERMAL", ACPI_THERMAL},
3997 {"ACPI_TIMER", ACPI_TIMER},
3998 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS},
4002 static struct debugtag dbg_level[] = {
4003 {"ACPI_LV_INIT", ACPI_LV_INIT},
4004 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT},
4005 {"ACPI_LV_INFO", ACPI_LV_INFO},
4006 {"ACPI_LV_REPAIR", ACPI_LV_REPAIR},
4007 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS},
4009 /* Trace verbosity level 1 [Standard Trace Level] */
4010 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES},
4011 {"ACPI_LV_PARSE", ACPI_LV_PARSE},
4012 {"ACPI_LV_LOAD", ACPI_LV_LOAD},
4013 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH},
4014 {"ACPI_LV_EXEC", ACPI_LV_EXEC},
4015 {"ACPI_LV_NAMES", ACPI_LV_NAMES},
4016 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION},
4017 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD},
4018 {"ACPI_LV_TABLES", ACPI_LV_TABLES},
4019 {"ACPI_LV_VALUES", ACPI_LV_VALUES},
4020 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS},
4021 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES},
4022 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS},
4023 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE},
4024 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1},
4026 /* Trace verbosity level 2 [Function tracing and memory allocation] */
4027 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS},
4028 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS},
4029 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS},
4030 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2},
4031 {"ACPI_LV_ALL", ACPI_LV_ALL},
4033 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */
4034 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX},
4035 {"ACPI_LV_THREADS", ACPI_LV_THREADS},
4036 {"ACPI_LV_IO", ACPI_LV_IO},
4037 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS},
4038 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3},
4040 /* Exceptionally verbose output -- also used in the global "DebugLevel" */
4041 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE},
4042 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO},
4043 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES},
4044 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS},
4045 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE},
4050 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag)
4062 while (*ep && !isspace(*ep))
4073 for (i = 0; tag[i].name != NULL; i++) {
4074 if (!strncmp(cp, tag[i].name, l)) {
4076 *flag |= tag[i].value;
4078 *flag &= ~tag[i].value;
4086 acpi_set_debugging(void *junk)
4088 char *layer, *level;
4095 layer = kern_getenv("debug.acpi.layer");
4096 level = kern_getenv("debug.acpi.level");
4097 if (layer == NULL && level == NULL)
4100 printf("ACPI set debug");
4101 if (layer != NULL) {
4102 if (strcmp("NONE", layer) != 0)
4103 printf(" layer '%s'", layer);
4104 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer);
4107 if (level != NULL) {
4108 if (strcmp("NONE", level) != 0)
4109 printf(" level '%s'", level);
4110 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel);
4116 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging,
4120 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS)
4123 struct debugtag *tag;
4127 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL)
4129 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) {
4130 tag = &dbg_layer[0];
4131 dbg = &AcpiDbgLayer;
4133 tag = &dbg_level[0];
4134 dbg = &AcpiDbgLevel;
4137 /* Get old values if this is a get request. */
4138 ACPI_SERIAL_BEGIN(acpi);
4140 sbuf_cpy(&sb, "NONE");
4141 } else if (req->newptr == NULL) {
4142 for (; tag->name != NULL; tag++) {
4143 if ((*dbg & tag->value) == tag->value)
4144 sbuf_printf(&sb, "%s ", tag->name);
4149 strlcpy(temp, sbuf_data(&sb), sizeof(temp));
4152 error = sysctl_handle_string(oidp, temp, sizeof(temp), req);
4154 /* Check for error or no change */
4155 if (error == 0 && req->newptr != NULL) {
4157 kern_setenv((char *)oidp->oid_arg1, temp);
4158 acpi_set_debugging(NULL);
4160 ACPI_SERIAL_END(acpi);
4165 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING,
4166 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", "");
4167 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING,
4168 "debug.acpi.level", 0, acpi_debug_sysctl, "A", "");
4169 #endif /* ACPI_DEBUG */
4172 acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS)
4177 old = acpi_debug_objects;
4178 error = sysctl_handle_int(oidp, &acpi_debug_objects, 0, req);
4179 if (error != 0 || req->newptr == NULL)
4181 if (old == acpi_debug_objects || (old && acpi_debug_objects))
4184 ACPI_SERIAL_BEGIN(acpi);
4185 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE;
4186 ACPI_SERIAL_END(acpi);
4192 acpi_parse_interfaces(char *str, struct acpi_interface *iface)
4199 while (isspace(*p) || *p == ',')
4204 p = strdup(p, M_TEMP);
4205 for (i = 0; i < len; i++)
4210 if (isspace(p[i]) || p[i] == '\0')
4213 i += strlen(p + i) + 1;
4220 iface->data = malloc(sizeof(*iface->data) * j, M_TEMP, M_WAITOK);
4224 if (isspace(p[i]) || p[i] == '\0')
4227 iface->data[j] = p + i;
4228 i += strlen(p + i) + 1;
4236 acpi_free_interfaces(struct acpi_interface *iface)
4239 free(iface->data[0], M_TEMP);
4240 free(iface->data, M_TEMP);
4244 acpi_reset_interfaces(device_t dev)
4246 struct acpi_interface list;
4250 if (acpi_parse_interfaces(acpi_install_interface, &list) > 0) {
4251 for (i = 0; i < list.num; i++) {
4252 status = AcpiInstallInterface(list.data[i]);
4253 if (ACPI_FAILURE(status))
4255 "failed to install _OSI(\"%s\"): %s\n",
4256 list.data[i], AcpiFormatException(status));
4257 else if (bootverbose)
4258 device_printf(dev, "installed _OSI(\"%s\")\n",
4261 acpi_free_interfaces(&list);
4263 if (acpi_parse_interfaces(acpi_remove_interface, &list) > 0) {
4264 for (i = 0; i < list.num; i++) {
4265 status = AcpiRemoveInterface(list.data[i]);
4266 if (ACPI_FAILURE(status))
4268 "failed to remove _OSI(\"%s\"): %s\n",
4269 list.data[i], AcpiFormatException(status));
4270 else if (bootverbose)
4271 device_printf(dev, "removed _OSI(\"%s\")\n",
4274 acpi_free_interfaces(&list);
4279 acpi_pm_func(u_long cmd, void *arg, ...)
4281 int state, acpi_state;
4283 struct acpi_softc *sc;
4288 case POWER_CMD_SUSPEND:
4289 sc = (struct acpi_softc *)arg;
4296 state = va_arg(ap, int);
4300 case POWER_SLEEP_STATE_STANDBY:
4301 acpi_state = sc->acpi_standby_sx;
4303 case POWER_SLEEP_STATE_SUSPEND:
4304 acpi_state = sc->acpi_suspend_sx;
4306 case POWER_SLEEP_STATE_HIBERNATE:
4307 acpi_state = ACPI_STATE_S4;
4314 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state)))
4327 acpi_pm_register(void *arg)
4329 if (!cold || resource_disabled("acpi", 0))
4332 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL);
4335 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, NULL);