1/*-
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
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
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.
16 *
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
27 * SUCH DAMAGE.
28 */
29
30#include <sys/cdefs.h>
|
31__FBSDID("$FreeBSD: head/sys/dev/acpica/acpi.c 236408 2012-06-01 17:00:33Z jkim $");
|
| 31__FBSDID("$FreeBSD: head/sys/dev/acpica/acpi.c 239340 2012-08-16 20:54:52Z jkim $"); |
32
33#include "opt_acpi.h"
34#include <sys/param.h>
35#include <sys/kernel.h>
36#include <sys/proc.h>
37#include <sys/fcntl.h>
38#include <sys/malloc.h>
39#include <sys/module.h>
40#include <sys/bus.h>
41#include <sys/conf.h>
42#include <sys/ioccom.h>
43#include <sys/reboot.h>
44#include <sys/sysctl.h>
45#include <sys/ctype.h>
46#include <sys/linker.h>
47#include <sys/power.h>
48#include <sys/sbuf.h>
49#include <sys/sched.h>
50#include <sys/smp.h>
51#include <sys/timetc.h>
52
53#if defined(__i386__) || defined(__amd64__)
54#include <machine/pci_cfgreg.h>
55#endif
56#include <machine/resource.h>
57#include <machine/bus.h>
58#include <sys/rman.h>
59#include <isa/isavar.h>
60#include <isa/pnpvar.h>
61
62#include <contrib/dev/acpica/include/acpi.h>
63#include <contrib/dev/acpica/include/accommon.h>
64#include <contrib/dev/acpica/include/acnamesp.h>
65
66#include <dev/acpica/acpivar.h>
67#include <dev/acpica/acpiio.h>
68
69#include <vm/vm_param.h>
70
71static MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices");
72
73/* Hooks for the ACPI CA debugging infrastructure */
74#define _COMPONENT ACPI_BUS
75ACPI_MODULE_NAME("ACPI")
76
77static d_open_t acpiopen;
78static d_close_t acpiclose;
79static d_ioctl_t acpiioctl;
80
81static struct cdevsw acpi_cdevsw = {
82 .d_version = D_VERSION,
83 .d_open = acpiopen,
84 .d_close = acpiclose,
85 .d_ioctl = acpiioctl,
86 .d_name = "acpi",
87};
88
89struct acpi_interface {
90 ACPI_STRING *data;
91 int num;
92};
93
94/* Global mutex for locking access to the ACPI subsystem. */
95struct mtx acpi_mutex;
96
97/* Bitmap of device quirks. */
98int acpi_quirks;
99
|
100/* Optional ACPI methods for suspend and resume, e.g., _GTS and _BFS. */
101int acpi_sleep_flags;
102
|
100/* Supported sleep states. */
101static BOOLEAN acpi_sleep_states[ACPI_S_STATE_COUNT];
102
103static int acpi_modevent(struct module *mod, int event, void *junk);
104static int acpi_probe(device_t dev);
105static int acpi_attach(device_t dev);
106static int acpi_suspend(device_t dev);
107static int acpi_resume(device_t dev);
108static int acpi_shutdown(device_t dev);
109static device_t acpi_add_child(device_t bus, u_int order, const char *name,
110 int unit);
111static int acpi_print_child(device_t bus, device_t child);
112static void acpi_probe_nomatch(device_t bus, device_t child);
113static void acpi_driver_added(device_t dev, driver_t *driver);
114static int acpi_read_ivar(device_t dev, device_t child, int index,
115 uintptr_t *result);
116static int acpi_write_ivar(device_t dev, device_t child, int index,
117 uintptr_t value);
118static struct resource_list *acpi_get_rlist(device_t dev, device_t child);
119static void acpi_reserve_resources(device_t dev);
120static int acpi_sysres_alloc(device_t dev);
121static int acpi_set_resource(device_t dev, device_t child, int type,
122 int rid, u_long start, u_long count);
123static struct resource *acpi_alloc_resource(device_t bus, device_t child,
124 int type, int *rid, u_long start, u_long end,
125 u_long count, u_int flags);
126static int acpi_adjust_resource(device_t bus, device_t child, int type,
127 struct resource *r, u_long start, u_long end);
128static int acpi_release_resource(device_t bus, device_t child, int type,
129 int rid, struct resource *r);
130static void acpi_delete_resource(device_t bus, device_t child, int type,
131 int rid);
132static uint32_t acpi_isa_get_logicalid(device_t dev);
133static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count);
134static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids);
135static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev,
136 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters,
137 ACPI_BUFFER *ret);
138static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level,
139 void *context, void **retval);
140static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev,
141 int max_depth, acpi_scan_cb_t user_fn, void *arg);
142static int acpi_set_powerstate(device_t child, int state);
143static int acpi_isa_pnp_probe(device_t bus, device_t child,
144 struct isa_pnp_id *ids);
145static void acpi_probe_children(device_t bus);
146static void acpi_probe_order(ACPI_HANDLE handle, int *order);
147static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level,
148 void *context, void **status);
149static void acpi_sleep_enable(void *arg);
150static ACPI_STATUS acpi_sleep_disable(struct acpi_softc *sc);
151static ACPI_STATUS acpi_EnterSleepState(struct acpi_softc *sc, int state);
152static void acpi_shutdown_final(void *arg, int howto);
153static void acpi_enable_fixed_events(struct acpi_softc *sc);
154static BOOLEAN acpi_has_hid(ACPI_HANDLE handle);
155static void acpi_resync_clock(struct acpi_softc *sc);
156static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate);
157static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate);
158static int acpi_wake_prep_walk(int sstate);
159static int acpi_wake_sysctl_walk(device_t dev);
160static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS);
161static void acpi_system_eventhandler_sleep(void *arg, int state);
162static void acpi_system_eventhandler_wakeup(void *arg, int state);
163static int acpi_sname2sstate(const char *sname);
164static const char *acpi_sstate2sname(int sstate);
165static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS);
166static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS);
167static int acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS);
168static int acpi_pm_func(u_long cmd, void *arg, ...);
169static int acpi_child_location_str_method(device_t acdev, device_t child,
170 char *buf, size_t buflen);
171static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child,
172 char *buf, size_t buflen);
173#if defined(__i386__) || defined(__amd64__)
174static void acpi_enable_pcie(void);
175#endif
176static void acpi_hint_device_unit(device_t acdev, device_t child,
177 const char *name, int *unitp);
178static void acpi_reset_interfaces(device_t dev);
179
180static device_method_t acpi_methods[] = {
181 /* Device interface */
182 DEVMETHOD(device_probe, acpi_probe),
183 DEVMETHOD(device_attach, acpi_attach),
184 DEVMETHOD(device_shutdown, acpi_shutdown),
185 DEVMETHOD(device_detach, bus_generic_detach),
186 DEVMETHOD(device_suspend, acpi_suspend),
187 DEVMETHOD(device_resume, acpi_resume),
188
189 /* Bus interface */
190 DEVMETHOD(bus_add_child, acpi_add_child),
191 DEVMETHOD(bus_print_child, acpi_print_child),
192 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch),
193 DEVMETHOD(bus_driver_added, acpi_driver_added),
194 DEVMETHOD(bus_read_ivar, acpi_read_ivar),
195 DEVMETHOD(bus_write_ivar, acpi_write_ivar),
196 DEVMETHOD(bus_get_resource_list, acpi_get_rlist),
197 DEVMETHOD(bus_set_resource, acpi_set_resource),
198 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
199 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource),
200 DEVMETHOD(bus_adjust_resource, acpi_adjust_resource),
201 DEVMETHOD(bus_release_resource, acpi_release_resource),
202 DEVMETHOD(bus_delete_resource, acpi_delete_resource),
203 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method),
204 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method),
205 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
206 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
207 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
208 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
209 DEVMETHOD(bus_hint_device_unit, acpi_hint_device_unit),
210
211 /* ACPI bus */
212 DEVMETHOD(acpi_id_probe, acpi_device_id_probe),
213 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj),
214 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep),
215 DEVMETHOD(acpi_scan_children, acpi_device_scan_children),
216
217 /* ISA emulation */
218 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe),
219
220 {0, 0}
221};
222
223static driver_t acpi_driver = {
224 "acpi",
225 acpi_methods,
226 sizeof(struct acpi_softc),
227};
228
229static devclass_t acpi_devclass;
230DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0);
231MODULE_VERSION(acpi, 1);
232
233ACPI_SERIAL_DECL(acpi, "ACPI root bus");
234
235/* Local pools for managing system resources for ACPI child devices. */
236static struct rman acpi_rman_io, acpi_rman_mem;
237
238#define ACPI_MINIMUM_AWAKETIME 5
239
240/* Holds the description of the acpi0 device. */
241static char acpi_desc[ACPI_OEM_ID_SIZE + ACPI_OEM_TABLE_ID_SIZE + 2];
242
243SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging");
244static char acpi_ca_version[12];
245SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD,
246 acpi_ca_version, 0, "Version of Intel ACPI-CA");
247
248/*
249 * Allow overriding _OSI methods.
250 */
251static char acpi_install_interface[256];
252TUNABLE_STR("hw.acpi.install_interface", acpi_install_interface,
253 sizeof(acpi_install_interface));
254static char acpi_remove_interface[256];
255TUNABLE_STR("hw.acpi.remove_interface", acpi_remove_interface,
256 sizeof(acpi_remove_interface));
257
258/*
259 * Allow override of whether methods execute in parallel or not.
260 * Enable this for serial behavior, which fixes "AE_ALREADY_EXISTS"
261 * errors for AML that really can't handle parallel method execution.
262 * It is off by default since this breaks recursive methods and
263 * some IBMs use such code.
264 */
265static int acpi_serialize_methods;
266TUNABLE_INT("hw.acpi.serialize_methods", &acpi_serialize_methods);
267
268/* Allow users to dump Debug objects without ACPI debugger. */
269static int acpi_debug_objects;
270TUNABLE_INT("debug.acpi.enable_debug_objects", &acpi_debug_objects);
271SYSCTL_PROC(_debug_acpi, OID_AUTO, enable_debug_objects,
272 CTLFLAG_RW | CTLTYPE_INT, NULL, 0, acpi_debug_objects_sysctl, "I",
273 "Enable Debug objects");
274
275/* Allow the interpreter to ignore common mistakes in BIOS. */
276static int acpi_interpreter_slack = 1;
277TUNABLE_INT("debug.acpi.interpreter_slack", &acpi_interpreter_slack);
278SYSCTL_INT(_debug_acpi, OID_AUTO, interpreter_slack, CTLFLAG_RDTUN,
279 &acpi_interpreter_slack, 1, "Turn on interpreter slack mode.");
280
281#ifdef __amd64__
282/* Reset system clock while resuming. XXX Remove once tested. */
283static int acpi_reset_clock = 1;
284TUNABLE_INT("debug.acpi.reset_clock", &acpi_reset_clock);
285SYSCTL_INT(_debug_acpi, OID_AUTO, reset_clock, CTLFLAG_RW,
286 &acpi_reset_clock, 1, "Reset system clock while resuming.");
287#endif
288
289/* Allow users to override quirks. */
290TUNABLE_INT("debug.acpi.quirks", &acpi_quirks);
291
|
295/* Execute optional ACPI methods for suspend and resume. */
296TUNABLE_INT("debug.acpi.sleep_flags", &acpi_sleep_flags);
297SYSCTL_INT(_debug_acpi, OID_AUTO, sleep_flags, CTLFLAG_RW | CTLFLAG_TUN,
298 &acpi_sleep_flags, 0, "Execute optional ACPI methods for suspend/resume.");
299
|
292static int acpi_susp_bounce;
293SYSCTL_INT(_debug_acpi, OID_AUTO, suspend_bounce, CTLFLAG_RW,
294 &acpi_susp_bounce, 0, "Don't actually suspend, just test devices.");
295
296/*
297 * ACPI can only be loaded as a module by the loader; activating it after
298 * system bootstrap time is not useful, and can be fatal to the system.
299 * It also cannot be unloaded, since the entire system bus hierarchy hangs
300 * off it.
301 */
302static int
303acpi_modevent(struct module *mod, int event, void *junk)
304{
305 switch (event) {
306 case MOD_LOAD:
307 if (!cold) {
308 printf("The ACPI driver cannot be loaded after boot.\n");
309 return (EPERM);
310 }
311 break;
312 case MOD_UNLOAD:
313 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI)
314 return (EBUSY);
315 break;
316 default:
317 break;
318 }
319 return (0);
320}
321
322/*
323 * Perform early initialization.
324 */
325ACPI_STATUS
326acpi_Startup(void)
327{
328 static int started = 0;
329 ACPI_STATUS status;
330 int val;
331
332 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
333
334 /* Only run the startup code once. The MADT driver also calls this. */
335 if (started)
336 return_VALUE (AE_OK);
337 started = 1;
338
339 /*
340 * Pre-allocate space for RSDT/XSDT and DSDT tables and allow resizing
341 * if more tables exist.
342 */
343 if (ACPI_FAILURE(status = AcpiInitializeTables(NULL, 2, TRUE))) {
344 printf("ACPI: Table initialisation failed: %s\n",
345 AcpiFormatException(status));
346 return_VALUE (status);
347 }
348
349 /* Set up any quirks we have for this system. */
350 if (acpi_quirks == ACPI_Q_OK)
351 acpi_table_quirks(&acpi_quirks);
352
353 /* If the user manually set the disabled hint to 0, force-enable ACPI. */
354 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0)
355 acpi_quirks &= ~ACPI_Q_BROKEN;
356 if (acpi_quirks & ACPI_Q_BROKEN) {
357 printf("ACPI disabled by blacklist. Contact your BIOS vendor.\n");
358 status = AE_SUPPORT;
359 }
360
361 return_VALUE (status);
362}
363
364/*
365 * Detect ACPI and perform early initialisation.
366 */
367int
368acpi_identify(void)
369{
370 ACPI_TABLE_RSDP *rsdp;
371 ACPI_TABLE_HEADER *rsdt;
372 ACPI_PHYSICAL_ADDRESS paddr;
373 struct sbuf sb;
374
375 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
376
377 if (!cold)
378 return (ENXIO);
379
380 /* Check that we haven't been disabled with a hint. */
381 if (resource_disabled("acpi", 0))
382 return (ENXIO);
383
384 /* Check for other PM systems. */
385 if (power_pm_get_type() != POWER_PM_TYPE_NONE &&
386 power_pm_get_type() != POWER_PM_TYPE_ACPI) {
387 printf("ACPI identify failed, other PM system enabled.\n");
388 return (ENXIO);
389 }
390
391 /* Initialize root tables. */
392 if (ACPI_FAILURE(acpi_Startup())) {
393 printf("ACPI: Try disabling either ACPI or apic support.\n");
394 return (ENXIO);
395 }
396
397 if ((paddr = AcpiOsGetRootPointer()) == 0 ||
398 (rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP))) == NULL)
399 return (ENXIO);
400 if (rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress != 0)
401 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress;
402 else
403 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress;
404 AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP));
405
406 if ((rsdt = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER))) == NULL)
407 return (ENXIO);
408 sbuf_new(&sb, acpi_desc, sizeof(acpi_desc), SBUF_FIXEDLEN);
409 sbuf_bcat(&sb, rsdt->OemId, ACPI_OEM_ID_SIZE);
410 sbuf_trim(&sb);
411 sbuf_putc(&sb, ' ');
412 sbuf_bcat(&sb, rsdt->OemTableId, ACPI_OEM_TABLE_ID_SIZE);
413 sbuf_trim(&sb);
414 sbuf_finish(&sb);
415 sbuf_delete(&sb);
416 AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER));
417
418 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%x", ACPI_CA_VERSION);
419
420 return (0);
421}
422
423/*
424 * Fetch some descriptive data from ACPI to put in our attach message.
425 */
426static int
427acpi_probe(device_t dev)
428{
429
430 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
431
432 device_set_desc(dev, acpi_desc);
433
434 return_VALUE (0);
435}
436
437static int
438acpi_attach(device_t dev)
439{
440 struct acpi_softc *sc;
441 ACPI_STATUS status;
442 int error, state;
443 UINT32 flags;
444 UINT8 TypeA, TypeB;
445 char *env;
446
447 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
448
449 sc = device_get_softc(dev);
450 sc->acpi_dev = dev;
451 callout_init(&sc->susp_force_to, TRUE);
452
453 error = ENXIO;
454
455 /* Initialize resource manager. */
456 acpi_rman_io.rm_type = RMAN_ARRAY;
457 acpi_rman_io.rm_start = 0;
458 acpi_rman_io.rm_end = 0xffff;
459 acpi_rman_io.rm_descr = "ACPI I/O ports";
460 if (rman_init(&acpi_rman_io) != 0)
461 panic("acpi rman_init IO ports failed");
462 acpi_rman_mem.rm_type = RMAN_ARRAY;
463 acpi_rman_mem.rm_start = 0;
464 acpi_rman_mem.rm_end = ~0ul;
465 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses";
466 if (rman_init(&acpi_rman_mem) != 0)
467 panic("acpi rman_init memory failed");
468
469 /* Initialise the ACPI mutex */
470 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF);
471
472 /*
473 * Set the globals from our tunables. This is needed because ACPI-CA
474 * uses UINT8 for some values and we have no tunable_byte.
475 */
476 AcpiGbl_AllMethodsSerialized = acpi_serialize_methods ? TRUE : FALSE;
477 AcpiGbl_EnableInterpreterSlack = acpi_interpreter_slack ? TRUE : FALSE;
478 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE;
479
480#ifndef ACPI_DEBUG
481 /*
482 * Disable all debugging layers and levels.
483 */
484 AcpiDbgLayer = 0;
485 AcpiDbgLevel = 0;
486#endif
487
488 /* Start up the ACPI CA subsystem. */
489 status = AcpiInitializeSubsystem();
490 if (ACPI_FAILURE(status)) {
491 device_printf(dev, "Could not initialize Subsystem: %s\n",
492 AcpiFormatException(status));
493 goto out;
494 }
495
496 /* Override OS interfaces if the user requested. */
497 acpi_reset_interfaces(dev);
498
499 /* Load ACPI name space. */
500 status = AcpiLoadTables();
501 if (ACPI_FAILURE(status)) {
502 device_printf(dev, "Could not load Namespace: %s\n",
503 AcpiFormatException(status));
504 goto out;
505 }
506
507#if defined(__i386__) || defined(__amd64__)
508 /* Handle MCFG table if present. */
509 acpi_enable_pcie();
510#endif
511
512 /*
513 * Note that some systems (specifically, those with namespace evaluation
514 * issues that require the avoidance of parts of the namespace) must
515 * avoid running _INI and _STA on everything, as well as dodging the final
516 * object init pass.
517 *
518 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT).
519 *
520 * XXX We should arrange for the object init pass after we have attached
521 * all our child devices, but on many systems it works here.
522 */
523 flags = 0;
524 if (testenv("debug.acpi.avoid"))
525 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT;
526
527 /* Bring the hardware and basic handlers online. */
528 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) {
529 device_printf(dev, "Could not enable ACPI: %s\n",
530 AcpiFormatException(status));
531 goto out;
532 }
533
534 /*
535 * Call the ECDT probe function to provide EC functionality before
536 * the namespace has been evaluated.
537 *
538 * XXX This happens before the sysresource devices have been probed and
539 * attached so its resources come from nexus0. In practice, this isn't
540 * a problem but should be addressed eventually.
541 */
542 acpi_ec_ecdt_probe(dev);
543
544 /* Bring device objects and regions online. */
545 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) {
546 device_printf(dev, "Could not initialize ACPI objects: %s\n",
547 AcpiFormatException(status));
548 goto out;
549 }
550
551 /*
552 * Setup our sysctl tree.
553 *
554 * XXX: This doesn't check to make sure that none of these fail.
555 */
556 sysctl_ctx_init(&sc->acpi_sysctl_ctx);
557 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx,
558 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO,
559 device_get_name(dev), CTLFLAG_RD, 0, "");
560 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
561 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD,
562 0, 0, acpi_supported_sleep_state_sysctl, "A", "");
563 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
564 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW,
565 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", "");
566 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
567 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW,
568 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", "");
569 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
570 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW,
571 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", "");
572 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
573 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW,
574 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", "");
575 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
576 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW,
577 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", "");
578 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
579 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0,
580 "sleep delay in seconds");
581 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
582 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode");
583 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
584 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode");
585 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
586 OID_AUTO, "disable_on_reboot", CTLFLAG_RW,
587 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system");
588 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
589 OID_AUTO, "handle_reboot", CTLFLAG_RW,
590 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot");
591
592 /*
593 * Default to 1 second before sleeping to give some machines time to
594 * stabilize.
595 */
596 sc->acpi_sleep_delay = 1;
597 if (bootverbose)
598 sc->acpi_verbose = 1;
599 if ((env = getenv("hw.acpi.verbose")) != NULL) {
600 if (strcmp(env, "0") != 0)
601 sc->acpi_verbose = 1;
602 freeenv(env);
603 }
604
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;
608
609 /* Only enable S4BIOS by default if the FACS says it is available. */
610 if (AcpiGbl_FACS->Flags & ACPI_FACS_S4_BIOS_PRESENT)
611 sc->acpi_s4bios = 1;
612
613 /* Probe all supported sleep states. */
614 acpi_sleep_states[ACPI_STATE_S0] = TRUE;
615 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++)
616 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB)))
617 acpi_sleep_states[state] = TRUE;
618
619 /*
620 * Dispatch the default sleep state to devices. The lid switch is set
621 * to UNKNOWN by default to avoid surprising users.
622 */
623 sc->acpi_power_button_sx = acpi_sleep_states[ACPI_STATE_S5] ?
624 ACPI_STATE_S5 : ACPI_STATE_UNKNOWN;
625 sc->acpi_lid_switch_sx = ACPI_STATE_UNKNOWN;
626 sc->acpi_standby_sx = acpi_sleep_states[ACPI_STATE_S1] ?
627 ACPI_STATE_S1 : ACPI_STATE_UNKNOWN;
628 sc->acpi_suspend_sx = acpi_sleep_states[ACPI_STATE_S3] ?
629 ACPI_STATE_S3 : ACPI_STATE_UNKNOWN;
630
631 /* Pick the first valid sleep state for the sleep button default. */
632 sc->acpi_sleep_button_sx = ACPI_STATE_UNKNOWN;
633 for (state = ACPI_STATE_S1; state <= ACPI_STATE_S4; state++)
634 if (acpi_sleep_states[state]) {
635 sc->acpi_sleep_button_sx = state;
636 break;
637 }
638
639 acpi_enable_fixed_events(sc);
640
641 /*
642 * Scan the namespace and attach/initialise children.
643 */
644
645 /* Register our shutdown handler. */
646 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc,
647 SHUTDOWN_PRI_LAST);
648
649 /*
650 * Register our acpi event handlers.
651 * XXX should be configurable eg. via userland policy manager.
652 */
653 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep,
654 sc, ACPI_EVENT_PRI_LAST);
655 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup,
656 sc, ACPI_EVENT_PRI_LAST);
657
658 /* Flag our initial states. */
659 sc->acpi_enabled = TRUE;
660 sc->acpi_sstate = ACPI_STATE_S0;
661 sc->acpi_sleep_disabled = TRUE;
662
663 /* Create the control device */
664 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644,
665 "acpi");
666 sc->acpi_dev_t->si_drv1 = sc;
667
668 if ((error = acpi_machdep_init(dev)))
669 goto out;
670
671 /* Register ACPI again to pass the correct argument of pm_func. */
672 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc);
673
674 if (!acpi_disabled("bus"))
675 acpi_probe_children(dev);
676
677 /* Update all GPEs and enable runtime GPEs. */
678 status = AcpiUpdateAllGpes();
679 if (ACPI_FAILURE(status))
680 device_printf(dev, "Could not update all GPEs: %s\n",
681 AcpiFormatException(status));
682
683 /* Allow sleep request after a while. */
684 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME);
685
686 error = 0;
687
688 out:
689 return_VALUE (error);
690}
691
692static void
693acpi_set_power_children(device_t dev, int state)
694{
695 device_t child, parent;
696 device_t *devlist;
697 struct pci_devinfo *dinfo;
698 int dstate, i, numdevs;
699
700 if (device_get_children(dev, &devlist, &numdevs) != 0)
701 return;
702
703 /*
704 * Retrieve and set D-state for the sleep state if _SxD is present.
705 * Skip children who aren't attached since they are handled separately.
706 */
707 parent = device_get_parent(dev);
708 for (i = 0; i < numdevs; i++) {
709 child = devlist[i];
710 dinfo = device_get_ivars(child);
711 dstate = state;
712 if (device_is_attached(child) &&
713 acpi_device_pwr_for_sleep(parent, dev, &dstate) == 0)
714 acpi_set_powerstate(child, dstate);
715 }
716 free(devlist, M_TEMP);
717}
718
719static int
720acpi_suspend(device_t dev)
721{
722 int error;
723
724 GIANT_REQUIRED;
725
726 error = bus_generic_suspend(dev);
727 if (error == 0)
728 acpi_set_power_children(dev, ACPI_STATE_D3);
729
730 return (error);
731}
732
733static int
734acpi_resume(device_t dev)
735{
736
737 GIANT_REQUIRED;
738
739 acpi_set_power_children(dev, ACPI_STATE_D0);
740
741 return (bus_generic_resume(dev));
742}
743
744static int
745acpi_shutdown(device_t dev)
746{
747
748 GIANT_REQUIRED;
749
750 /* Allow children to shutdown first. */
751 bus_generic_shutdown(dev);
752
753 /*
754 * Enable any GPEs that are able to power-on the system (i.e., RTC).
755 * Also, disable any that are not valid for this state (most).
756 */
757 acpi_wake_prep_walk(ACPI_STATE_S5);
758
759 return (0);
760}
761
762/*
763 * Handle a new device being added
764 */
765static device_t
766acpi_add_child(device_t bus, u_int order, const char *name, int unit)
767{
768 struct acpi_device *ad;
769 device_t child;
770
771 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL)
772 return (NULL);
773
774 resource_list_init(&ad->ad_rl);
775
776 child = device_add_child_ordered(bus, order, name, unit);
777 if (child != NULL)
778 device_set_ivars(child, ad);
779 else
780 free(ad, M_ACPIDEV);
781 return (child);
782}
783
784static int
785acpi_print_child(device_t bus, device_t child)
786{
787 struct acpi_device *adev = device_get_ivars(child);
788 struct resource_list *rl = &adev->ad_rl;
789 int retval = 0;
790
791 retval += bus_print_child_header(bus, child);
792 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx");
793 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx");
794 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
795 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld");
796 if (device_get_flags(child))
797 retval += printf(" flags %#x", device_get_flags(child));
798 retval += bus_print_child_footer(bus, child);
799
800 return (retval);
801}
802
803/*
804 * If this device is an ACPI child but no one claimed it, attempt
805 * to power it off. We'll power it back up when a driver is added.
806 *
807 * XXX Disabled for now since many necessary devices (like fdc and
808 * ATA) don't claim the devices we created for them but still expect
809 * them to be powered up.
810 */
811static void
812acpi_probe_nomatch(device_t bus, device_t child)
813{
814#ifdef ACPI_ENABLE_POWERDOWN_NODRIVER
815 acpi_set_powerstate(child, ACPI_STATE_D3);
816#endif
817}
818
819/*
820 * If a new driver has a chance to probe a child, first power it up.
821 *
822 * XXX Disabled for now (see acpi_probe_nomatch for details).
823 */
824static void
825acpi_driver_added(device_t dev, driver_t *driver)
826{
827 device_t child, *devlist;
828 int i, numdevs;
829
830 DEVICE_IDENTIFY(driver, dev);
831 if (device_get_children(dev, &devlist, &numdevs))
832 return;
833 for (i = 0; i < numdevs; i++) {
834 child = devlist[i];
835 if (device_get_state(child) == DS_NOTPRESENT) {
836#ifdef ACPI_ENABLE_POWERDOWN_NODRIVER
837 acpi_set_powerstate(child, ACPI_STATE_D0);
838 if (device_probe_and_attach(child) != 0)
839 acpi_set_powerstate(child, ACPI_STATE_D3);
840#else
841 device_probe_and_attach(child);
842#endif
843 }
844 }
845 free(devlist, M_TEMP);
846}
847
848/* Location hint for devctl(8) */
849static int
850acpi_child_location_str_method(device_t cbdev, device_t child, char *buf,
851 size_t buflen)
852{
853 struct acpi_device *dinfo = device_get_ivars(child);
854
855 if (dinfo->ad_handle)
856 snprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle));
857 else
858 snprintf(buf, buflen, "unknown");
859 return (0);
860}
861
862/* PnP information for devctl(8) */
863static int
864acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf,
865 size_t buflen)
866{
867 struct acpi_device *dinfo = device_get_ivars(child);
868 ACPI_DEVICE_INFO *adinfo;
869
870 if (ACPI_FAILURE(AcpiGetObjectInfo(dinfo->ad_handle, &adinfo))) {
871 snprintf(buf, buflen, "unknown");
872 return (0);
873 }
874
875 snprintf(buf, buflen, "_HID=%s _UID=%lu",
876 (adinfo->Valid & ACPI_VALID_HID) ?
877 adinfo->HardwareId.String : "none",
878 (adinfo->Valid & ACPI_VALID_UID) ?
879 strtoul(adinfo->UniqueId.String, NULL, 10) : 0UL);
880 AcpiOsFree(adinfo);
881
882 return (0);
883}
884
885/*
886 * Handle per-device ivars
887 */
888static int
889acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
890{
891 struct acpi_device *ad;
892
893 if ((ad = device_get_ivars(child)) == NULL) {
894 device_printf(child, "device has no ivars\n");
895 return (ENOENT);
896 }
897
898 /* ACPI and ISA compatibility ivars */
899 switch(index) {
900 case ACPI_IVAR_HANDLE:
901 *(ACPI_HANDLE *)result = ad->ad_handle;
902 break;
903 case ACPI_IVAR_PRIVATE:
904 *(void **)result = ad->ad_private;
905 break;
906 case ACPI_IVAR_FLAGS:
907 *(int *)result = ad->ad_flags;
908 break;
909 case ISA_IVAR_VENDORID:
910 case ISA_IVAR_SERIAL:
911 case ISA_IVAR_COMPATID:
912 *(int *)result = -1;
913 break;
914 case ISA_IVAR_LOGICALID:
915 *(int *)result = acpi_isa_get_logicalid(child);
916 break;
917 default:
918 return (ENOENT);
919 }
920
921 return (0);
922}
923
924static int
925acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value)
926{
927 struct acpi_device *ad;
928
929 if ((ad = device_get_ivars(child)) == NULL) {
930 device_printf(child, "device has no ivars\n");
931 return (ENOENT);
932 }
933
934 switch(index) {
935 case ACPI_IVAR_HANDLE:
936 ad->ad_handle = (ACPI_HANDLE)value;
937 break;
938 case ACPI_IVAR_PRIVATE:
939 ad->ad_private = (void *)value;
940 break;
941 case ACPI_IVAR_FLAGS:
942 ad->ad_flags = (int)value;
943 break;
944 default:
945 panic("bad ivar write request (%d)", index);
946 return (ENOENT);
947 }
948
949 return (0);
950}
951
952/*
953 * Handle child resource allocation/removal
954 */
955static struct resource_list *
956acpi_get_rlist(device_t dev, device_t child)
957{
958 struct acpi_device *ad;
959
960 ad = device_get_ivars(child);
961 return (&ad->ad_rl);
962}
963
964static int
965acpi_match_resource_hint(device_t dev, int type, long value)
966{
967 struct acpi_device *ad = device_get_ivars(dev);
968 struct resource_list *rl = &ad->ad_rl;
969 struct resource_list_entry *rle;
970
971 STAILQ_FOREACH(rle, rl, link) {
972 if (rle->type != type)
973 continue;
974 if (rle->start <= value && rle->end >= value)
975 return (1);
976 }
977 return (0);
978}
979
980/*
981 * Wire device unit numbers based on resource matches in hints.
982 */
983static void
984acpi_hint_device_unit(device_t acdev, device_t child, const char *name,
985 int *unitp)
986{
987 const char *s;
988 long value;
989 int line, matches, unit;
990
991 /*
992 * Iterate over all the hints for the devices with the specified
993 * name to see if one's resources are a subset of this device.
994 */
995 line = 0;
996 for (;;) {
997 if (resource_find_dev(&line, name, &unit, "at", NULL) != 0)
998 break;
999
1000 /* Must have an "at" for acpi or isa. */
1001 resource_string_value(name, unit, "at", &s);
1002 if (!(strcmp(s, "acpi0") == 0 || strcmp(s, "acpi") == 0 ||
1003 strcmp(s, "isa0") == 0 || strcmp(s, "isa") == 0))
1004 continue;
1005
1006 /*
1007 * Check for matching resources. We must have at least one match.
1008 * Since I/O and memory resources cannot be shared, if we get a
1009 * match on either of those, ignore any mismatches in IRQs or DRQs.
1010 *
1011 * XXX: We may want to revisit this to be more lenient and wire
1012 * as long as it gets one match.
1013 */
1014 matches = 0;
1015 if (resource_long_value(name, unit, "port", &value) == 0) {
1016 /*
1017 * Floppy drive controllers are notorious for having a
1018 * wide variety of resources not all of which include the
1019 * first port that is specified by the hint (typically
1020 * 0x3f0) (see the comment above fdc_isa_alloc_resources()
1021 * in fdc_isa.c). However, they do all seem to include
1022 * port + 2 (e.g. 0x3f2) so for a floppy device, look for
1023 * 'value + 2' in the port resources instead of the hint
1024 * value.
1025 */
1026 if (strcmp(name, "fdc") == 0)
1027 value += 2;
1028 if (acpi_match_resource_hint(child, SYS_RES_IOPORT, value))
1029 matches++;
1030 else
1031 continue;
1032 }
1033 if (resource_long_value(name, unit, "maddr", &value) == 0) {
1034 if (acpi_match_resource_hint(child, SYS_RES_MEMORY, value))
1035 matches++;
1036 else
1037 continue;
1038 }
1039 if (matches > 0)
1040 goto matched;
1041 if (resource_long_value(name, unit, "irq", &value) == 0) {
1042 if (acpi_match_resource_hint(child, SYS_RES_IRQ, value))
1043 matches++;
1044 else
1045 continue;
1046 }
1047 if (resource_long_value(name, unit, "drq", &value) == 0) {
1048 if (acpi_match_resource_hint(child, SYS_RES_DRQ, value))
1049 matches++;
1050 else
1051 continue;
1052 }
1053
1054 matched:
1055 if (matches > 0) {
1056 /* We have a winner! */
1057 *unitp = unit;
1058 break;
1059 }
1060 }
1061}
1062
1063/*
1064 * Pre-allocate/manage all memory and IO resources. Since rman can't handle
1065 * duplicates, we merge any in the sysresource attach routine.
1066 */
1067static int
1068acpi_sysres_alloc(device_t dev)
1069{
1070 struct resource *res;
1071 struct resource_list *rl;
1072 struct resource_list_entry *rle;
1073 struct rman *rm;
1074 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL };
1075 device_t *children;
1076 int child_count, i;
1077
1078 /*
1079 * Probe/attach any sysresource devices. This would be unnecessary if we
1080 * had multi-pass probe/attach.
1081 */
1082 if (device_get_children(dev, &children, &child_count) != 0)
1083 return (ENXIO);
1084 for (i = 0; i < child_count; i++) {
1085 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL)
1086 device_probe_and_attach(children[i]);
1087 }
1088 free(children, M_TEMP);
1089
1090 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev);
1091 STAILQ_FOREACH(rle, rl, link) {
1092 if (rle->res != NULL) {
1093 device_printf(dev, "duplicate resource for %lx\n", rle->start);
1094 continue;
1095 }
1096
1097 /* Only memory and IO resources are valid here. */
1098 switch (rle->type) {
1099 case SYS_RES_IOPORT:
1100 rm = &acpi_rman_io;
1101 break;
1102 case SYS_RES_MEMORY:
1103 rm = &acpi_rman_mem;
1104 break;
1105 default:
1106 continue;
1107 }
1108
1109 /* Pre-allocate resource and add to our rman pool. */
1110 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type,
1111 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 0);
1112 if (res != NULL) {
1113 rman_manage_region(rm, rman_get_start(res), rman_get_end(res));
1114 rle->res = res;
1115 } else
1116 device_printf(dev, "reservation of %lx, %lx (%d) failed\n",
1117 rle->start, rle->count, rle->type);
1118 }
1119 return (0);
1120}
1121
1122static char *pcilink_ids[] = { "PNP0C0F", NULL };
1123static char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL };
1124
1125/*
1126 * Reserve declared resources for devices found during attach once system
1127 * resources have been allocated.
1128 */
1129static void
1130acpi_reserve_resources(device_t dev)
1131{
1132 struct resource_list_entry *rle;
1133 struct resource_list *rl;
1134 struct acpi_device *ad;
1135 struct acpi_softc *sc;
1136 device_t *children;
1137 int child_count, i;
1138
1139 sc = device_get_softc(dev);
1140 if (device_get_children(dev, &children, &child_count) != 0)
1141 return;
1142 for (i = 0; i < child_count; i++) {
1143 ad = device_get_ivars(children[i]);
1144 rl = &ad->ad_rl;
1145
1146 /* Don't reserve system resources. */
1147 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL)
1148 continue;
1149
1150 STAILQ_FOREACH(rle, rl, link) {
1151 /*
1152 * Don't reserve IRQ resources. There are many sticky things
1153 * to get right otherwise (e.g. IRQs for psm, atkbd, and HPET
1154 * when using legacy routing).
1155 */
1156 if (rle->type == SYS_RES_IRQ)
1157 continue;
1158
1159 /*
1160 * Don't reserve the resource if it is already allocated.
1161 * The acpi_ec(4) driver can allocate its resources early
1162 * if ECDT is present.
1163 */
1164 if (rle->res != NULL)
1165 continue;
1166
1167 /*
1168 * Try to reserve the resource from our parent. If this
1169 * fails because the resource is a system resource, just
1170 * let it be. The resource range is already reserved so
1171 * that other devices will not use it. If the driver
1172 * needs to allocate the resource, then
1173 * acpi_alloc_resource() will sub-alloc from the system
1174 * resource.
1175 */
1176 resource_list_reserve(rl, dev, children[i], rle->type, &rle->rid,
1177 rle->start, rle->end, rle->count, 0);
1178 }
1179 }
1180 free(children, M_TEMP);
1181 sc->acpi_resources_reserved = 1;
1182}
1183
1184static int
1185acpi_set_resource(device_t dev, device_t child, int type, int rid,
1186 u_long start, u_long count)
1187{
1188 struct acpi_softc *sc = device_get_softc(dev);
1189 struct acpi_device *ad = device_get_ivars(child);
1190 struct resource_list *rl = &ad->ad_rl;
1191 u_long end;
1192
1193 /* Ignore IRQ resources for PCI link devices. */
1194 if (type == SYS_RES_IRQ && ACPI_ID_PROBE(dev, child, pcilink_ids) != NULL)
1195 return (0);
1196
1197 /* If the resource is already allocated, fail. */
1198 if (resource_list_busy(rl, type, rid))
1199 return (EBUSY);
1200
1201 /* If the resource is already reserved, release it. */
1202 if (resource_list_reserved(rl, type, rid))
1203 resource_list_unreserve(rl, dev, child, type, rid);
1204
1205 /* Add the resource. */
1206 end = (start + count - 1);
1207 resource_list_add(rl, type, rid, start, end, count);
1208
1209 /* Don't reserve resources until the system resources are allocated. */
1210 if (!sc->acpi_resources_reserved)
1211 return (0);
1212
1213 /* Don't reserve system resources. */
1214 if (ACPI_ID_PROBE(dev, child, sysres_ids) != NULL)
1215 return (0);
1216
1217 /*
1218 * Don't reserve IRQ resources. There are many sticky things to
1219 * get right otherwise (e.g. IRQs for psm, atkbd, and HPET when
1220 * using legacy routing).
1221 */
1222 if (type == SYS_RES_IRQ)
1223 return (0);
1224
1225 /*
1226 * Reserve the resource.
1227 *
1228 * XXX: Ignores failure for now. Failure here is probably a
1229 * BIOS/firmware bug?
1230 */
1231 resource_list_reserve(rl, dev, child, type, &rid, start, end, count, 0);
1232 return (0);
1233}
1234
1235static struct resource *
1236acpi_alloc_resource(device_t bus, device_t child, int type, int *rid,
1237 u_long start, u_long end, u_long count, u_int flags)
1238{
1239 ACPI_RESOURCE ares;
1240 struct acpi_device *ad;
1241 struct resource_list_entry *rle;
1242 struct resource_list *rl;
1243 struct resource *res;
1244 int isdefault = (start == 0UL && end == ~0UL);
1245
1246 /*
1247 * First attempt at allocating the resource. For direct children,
1248 * use resource_list_alloc() to handle reserved resources. For
1249 * other devices, pass the request up to our parent.
1250 */
1251 if (bus == device_get_parent(child)) {
1252 ad = device_get_ivars(child);
1253 rl = &ad->ad_rl;
1254
1255 /*
1256 * Simulate the behavior of the ISA bus for direct children
1257 * devices. That is, if a non-default range is specified for
1258 * a resource that doesn't exist, use bus_set_resource() to
1259 * add the resource before allocating it. Note that these
1260 * resources will not be reserved.
1261 */
1262 if (!isdefault && resource_list_find(rl, type, *rid) == NULL)
1263 resource_list_add(rl, type, *rid, start, end, count);
1264 res = resource_list_alloc(rl, bus, child, type, rid, start, end, count,
1265 flags);
1266 if (res != NULL && type == SYS_RES_IRQ) {
1267 /*
1268 * Since bus_config_intr() takes immediate effect, we cannot
1269 * configure the interrupt associated with a device when we
1270 * parse the resources but have to defer it until a driver
1271 * actually allocates the interrupt via bus_alloc_resource().
1272 *
1273 * XXX: Should we handle the lookup failing?
1274 */
1275 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares)))
1276 acpi_config_intr(child, &ares);
1277 }
1278
1279 /*
1280 * If this is an allocation of the "default" range for a given
1281 * RID, fetch the exact bounds for this resource from the
1282 * resource list entry to try to allocate the range from the
1283 * system resource regions.
1284 */
1285 if (res == NULL && isdefault) {
1286 rle = resource_list_find(rl, type, *rid);
1287 if (rle != NULL) {
1288 start = rle->start;
1289 end = rle->end;
1290 count = rle->count;
1291 }
1292 }
1293 } else
1294 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid,
1295 start, end, count, flags);
1296
1297 /*
1298 * If the first attempt failed and this is an allocation of a
1299 * specific range, try to satisfy the request via a suballocation
1300 * from our system resource regions.
1301 */
1302 if (res == NULL && start + count - 1 == end)
1303 res = acpi_alloc_sysres(child, type, rid, start, end, count, flags);
1304 return (res);
1305}
1306
1307/*
1308 * Attempt to allocate a specific resource range from the system
1309 * resource ranges. Note that we only handle memory and I/O port
1310 * system resources.
1311 */
1312struct resource *
1313acpi_alloc_sysres(device_t child, int type, int *rid, u_long start, u_long end,
1314 u_long count, u_int flags)
1315{
1316 struct rman *rm;
1317 struct resource *res;
1318
1319 switch (type) {
1320 case SYS_RES_IOPORT:
1321 rm = &acpi_rman_io;
1322 break;
1323 case SYS_RES_MEMORY:
1324 rm = &acpi_rman_mem;
1325 break;
1326 default:
1327 return (NULL);
1328 }
1329
1330 KASSERT(start + count - 1 == end, ("wildcard resource range"));
1331 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE,
1332 child);
1333 if (res == NULL)
1334 return (NULL);
1335
1336 rman_set_rid(res, *rid);
1337
1338 /* If requested, activate the resource using the parent's method. */
1339 if (flags & RF_ACTIVE)
1340 if (bus_activate_resource(child, type, *rid, res) != 0) {
1341 rman_release_resource(res);
1342 return (NULL);
1343 }
1344
1345 return (res);
1346}
1347
1348static int
1349acpi_is_resource_managed(int type, struct resource *r)
1350{
1351
1352 /* We only handle memory and IO resources through rman. */
1353 switch (type) {
1354 case SYS_RES_IOPORT:
1355 return (rman_is_region_manager(r, &acpi_rman_io));
1356 case SYS_RES_MEMORY:
1357 return (rman_is_region_manager(r, &acpi_rman_mem));
1358 }
1359 return (0);
1360}
1361
1362static int
1363acpi_adjust_resource(device_t bus, device_t child, int type, struct resource *r,
1364 u_long start, u_long end)
1365{
1366
1367 if (acpi_is_resource_managed(type, r))
1368 return (rman_adjust_resource(r, start, end));
1369 return (bus_generic_adjust_resource(bus, child, type, r, start, end));
1370}
1371
1372static int
1373acpi_release_resource(device_t bus, device_t child, int type, int rid,
1374 struct resource *r)
1375{
1376 int ret;
1377
1378 /*
1379 * If this resource belongs to one of our internal managers,
1380 * deactivate it and release it to the local pool.
1381 */
1382 if (acpi_is_resource_managed(type, r)) {
1383 if (rman_get_flags(r) & RF_ACTIVE) {
1384 ret = bus_deactivate_resource(child, type, rid, r);
1385 if (ret != 0)
1386 return (ret);
1387 }
1388 return (rman_release_resource(r));
1389 }
1390
1391 return (bus_generic_rl_release_resource(bus, child, type, rid, r));
1392}
1393
1394static void
1395acpi_delete_resource(device_t bus, device_t child, int type, int rid)
1396{
1397 struct resource_list *rl;
1398
1399 rl = acpi_get_rlist(bus, child);
1400 if (resource_list_busy(rl, type, rid)) {
1401 device_printf(bus, "delete_resource: Resource still owned by child"
1402 " (type=%d, rid=%d)\n", type, rid);
1403 return;
1404 }
1405 resource_list_unreserve(rl, bus, child, type, rid);
1406 resource_list_delete(rl, type, rid);
1407}
1408
1409/* Allocate an IO port or memory resource, given its GAS. */
1410int
1411acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas,
1412 struct resource **res, u_int flags)
1413{
1414 int error, res_type;
1415
1416 error = ENOMEM;
1417 if (type == NULL || rid == NULL || gas == NULL || res == NULL)
1418 return (EINVAL);
1419
1420 /* We only support memory and IO spaces. */
1421 switch (gas->SpaceId) {
1422 case ACPI_ADR_SPACE_SYSTEM_MEMORY:
1423 res_type = SYS_RES_MEMORY;
1424 break;
1425 case ACPI_ADR_SPACE_SYSTEM_IO:
1426 res_type = SYS_RES_IOPORT;
1427 break;
1428 default:
1429 return (EOPNOTSUPP);
1430 }
1431
1432 /*
1433 * If the register width is less than 8, assume the BIOS author means
1434 * it is a bit field and just allocate a byte.
1435 */
1436 if (gas->BitWidth && gas->BitWidth < 8)
1437 gas->BitWidth = 8;
1438
1439 /* Validate the address after we're sure we support the space. */
1440 if (gas->Address == 0 || gas->BitWidth == 0)
1441 return (EINVAL);
1442
1443 bus_set_resource(dev, res_type, *rid, gas->Address,
1444 gas->BitWidth / 8);
1445 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags);
1446 if (*res != NULL) {
1447 *type = res_type;
1448 error = 0;
1449 } else
1450 bus_delete_resource(dev, res_type, *rid);
1451
1452 return (error);
1453}
1454
1455/* Probe _HID and _CID for compatible ISA PNP ids. */
1456static uint32_t
1457acpi_isa_get_logicalid(device_t dev)
1458{
1459 ACPI_DEVICE_INFO *devinfo;
1460 ACPI_HANDLE h;
1461 uint32_t pnpid;
1462
1463 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1464
1465 /* Fetch and validate the HID. */
1466 if ((h = acpi_get_handle(dev)) == NULL ||
1467 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
1468 return_VALUE (0);
1469
1470 pnpid = (devinfo->Valid & ACPI_VALID_HID) != 0 &&
1471 devinfo->HardwareId.Length >= ACPI_EISAID_STRING_SIZE ?
1472 PNP_EISAID(devinfo->HardwareId.String) : 0;
1473 AcpiOsFree(devinfo);
1474
1475 return_VALUE (pnpid);
1476}
1477
1478static int
1479acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count)
1480{
1481 ACPI_DEVICE_INFO *devinfo;
1482 ACPI_DEVICE_ID *ids;
1483 ACPI_HANDLE h;
1484 uint32_t *pnpid;
1485 int i, valid;
1486
1487 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1488
1489 pnpid = cids;
1490
1491 /* Fetch and validate the CID */
1492 if ((h = acpi_get_handle(dev)) == NULL ||
1493 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
1494 return_VALUE (0);
1495
1496 if ((devinfo->Valid & ACPI_VALID_CID) == 0) {
1497 AcpiOsFree(devinfo);
1498 return_VALUE (0);
1499 }
1500
1501 if (devinfo->CompatibleIdList.Count < count)
1502 count = devinfo->CompatibleIdList.Count;
1503 ids = devinfo->CompatibleIdList.Ids;
1504 for (i = 0, valid = 0; i < count; i++)
1505 if (ids[i].Length >= ACPI_EISAID_STRING_SIZE &&
1506 strncmp(ids[i].String, "PNP", 3) == 0) {
1507 *pnpid++ = PNP_EISAID(ids[i].String);
1508 valid++;
1509 }
1510 AcpiOsFree(devinfo);
1511
1512 return_VALUE (valid);
1513}
1514
1515static char *
1516acpi_device_id_probe(device_t bus, device_t dev, char **ids)
1517{
1518 ACPI_HANDLE h;
1519 ACPI_OBJECT_TYPE t;
1520 int i;
1521
1522 h = acpi_get_handle(dev);
1523 if (ids == NULL || h == NULL)
1524 return (NULL);
1525 t = acpi_get_type(dev);
1526 if (t != ACPI_TYPE_DEVICE && t != ACPI_TYPE_PROCESSOR)
1527 return (NULL);
1528
1529 /* Try to match one of the array of IDs with a HID or CID. */
1530 for (i = 0; ids[i] != NULL; i++) {
1531 if (acpi_MatchHid(h, ids[i]))
1532 return (ids[i]);
1533 }
1534 return (NULL);
1535}
1536
1537static ACPI_STATUS
1538acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname,
1539 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret)
1540{
1541 ACPI_HANDLE h;
1542
1543 if (dev == NULL)
1544 h = ACPI_ROOT_OBJECT;
1545 else if ((h = acpi_get_handle(dev)) == NULL)
1546 return (AE_BAD_PARAMETER);
1547 return (AcpiEvaluateObject(h, pathname, parameters, ret));
1548}
1549
1550int
1551acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate)
1552{
1553 struct acpi_softc *sc;
1554 ACPI_HANDLE handle;
1555 ACPI_STATUS status;
1556 char sxd[8];
1557
1558 handle = acpi_get_handle(dev);
1559
1560 /*
1561 * XXX If we find these devices, don't try to power them down.
1562 * The serial and IRDA ports on my T23 hang the system when
1563 * set to D3 and it appears that such legacy devices may
1564 * need special handling in their drivers.
1565 */
1566 if (dstate == NULL || handle == NULL ||
1567 acpi_MatchHid(handle, "PNP0500") ||
1568 acpi_MatchHid(handle, "PNP0501") ||
1569 acpi_MatchHid(handle, "PNP0502") ||
1570 acpi_MatchHid(handle, "PNP0510") ||
1571 acpi_MatchHid(handle, "PNP0511"))
1572 return (ENXIO);
1573
1574 /*
1575 * Override next state with the value from _SxD, if present.
1576 * Note illegal _S0D is evaluated because some systems expect this.
1577 */
1578 sc = device_get_softc(bus);
1579 snprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate);
1580 status = acpi_GetInteger(handle, sxd, dstate);
1581 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
1582 device_printf(dev, "failed to get %s on %s: %s\n", sxd,
1583 acpi_name(handle), AcpiFormatException(status));
1584 return (ENXIO);
1585 }
1586
1587 return (0);
1588}
1589
1590/* Callback arg for our implementation of walking the namespace. */
1591struct acpi_device_scan_ctx {
1592 acpi_scan_cb_t user_fn;
1593 void *arg;
1594 ACPI_HANDLE parent;
1595};
1596
1597static ACPI_STATUS
1598acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval)
1599{
1600 struct acpi_device_scan_ctx *ctx;
1601 device_t dev, old_dev;
1602 ACPI_STATUS status;
1603 ACPI_OBJECT_TYPE type;
1604
1605 /*
1606 * Skip this device if we think we'll have trouble with it or it is
1607 * the parent where the scan began.
1608 */
1609 ctx = (struct acpi_device_scan_ctx *)arg;
1610 if (acpi_avoid(h) || h == ctx->parent)
1611 return (AE_OK);
1612
1613 /* If this is not a valid device type (e.g., a method), skip it. */
1614 if (ACPI_FAILURE(AcpiGetType(h, &type)))
1615 return (AE_OK);
1616 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR &&
1617 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER)
1618 return (AE_OK);
1619
1620 /*
1621 * Call the user function with the current device. If it is unchanged
1622 * afterwards, return. Otherwise, we update the handle to the new dev.
1623 */
1624 old_dev = acpi_get_device(h);
1625 dev = old_dev;
1626 status = ctx->user_fn(h, &dev, level, ctx->arg);
1627 if (ACPI_FAILURE(status) || old_dev == dev)
1628 return (status);
1629
1630 /* Remove the old child and its connection to the handle. */
1631 if (old_dev != NULL) {
1632 device_delete_child(device_get_parent(old_dev), old_dev);
1633 AcpiDetachData(h, acpi_fake_objhandler);
1634 }
1635
1636 /* Recreate the handle association if the user created a device. */
1637 if (dev != NULL)
1638 AcpiAttachData(h, acpi_fake_objhandler, dev);
1639
1640 return (AE_OK);
1641}
1642
1643static ACPI_STATUS
1644acpi_device_scan_children(device_t bus, device_t dev, int max_depth,
1645 acpi_scan_cb_t user_fn, void *arg)
1646{
1647 ACPI_HANDLE h;
1648 struct acpi_device_scan_ctx ctx;
1649
1650 if (acpi_disabled("children"))
1651 return (AE_OK);
1652
1653 if (dev == NULL)
1654 h = ACPI_ROOT_OBJECT;
1655 else if ((h = acpi_get_handle(dev)) == NULL)
1656 return (AE_BAD_PARAMETER);
1657 ctx.user_fn = user_fn;
1658 ctx.arg = arg;
1659 ctx.parent = h;
1660 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth,
1661 acpi_device_scan_cb, NULL, &ctx, NULL));
1662}
1663
1664/*
1665 * Even though ACPI devices are not PCI, we use the PCI approach for setting
1666 * device power states since it's close enough to ACPI.
1667 */
1668static int
1669acpi_set_powerstate(device_t child, int state)
1670{
1671 ACPI_HANDLE h;
1672 ACPI_STATUS status;
1673
1674 h = acpi_get_handle(child);
1675 if (state < ACPI_STATE_D0 || state > ACPI_D_STATES_MAX)
1676 return (EINVAL);
1677 if (h == NULL)
1678 return (0);
1679
1680 /* Ignore errors if the power methods aren't present. */
1681 status = acpi_pwr_switch_consumer(h, state);
1682 if (ACPI_SUCCESS(status)) {
1683 if (bootverbose)
1684 device_printf(child, "set ACPI power state D%d on %s\n",
1685 state, acpi_name(h));
1686 } else if (status != AE_NOT_FOUND)
1687 device_printf(child,
1688 "failed to set ACPI power state D%d on %s: %s\n", state,
1689 acpi_name(h), AcpiFormatException(status));
1690
1691 return (0);
1692}
1693
1694static int
1695acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids)
1696{
1697 int result, cid_count, i;
1698 uint32_t lid, cids[8];
1699
1700 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1701
1702 /*
1703 * ISA-style drivers attached to ACPI may persist and
1704 * probe manually if we return ENOENT. We never want
1705 * that to happen, so don't ever return it.
1706 */
1707 result = ENXIO;
1708
1709 /* Scan the supplied IDs for a match */
1710 lid = acpi_isa_get_logicalid(child);
1711 cid_count = acpi_isa_get_compatid(child, cids, 8);
1712 while (ids && ids->ip_id) {
1713 if (lid == ids->ip_id) {
1714 result = 0;
1715 goto out;
1716 }
1717 for (i = 0; i < cid_count; i++) {
1718 if (cids[i] == ids->ip_id) {
1719 result = 0;
1720 goto out;
1721 }
1722 }
1723 ids++;
1724 }
1725
1726 out:
1727 if (result == 0 && ids->ip_desc)
1728 device_set_desc(child, ids->ip_desc);
1729
1730 return_VALUE (result);
1731}
1732
1733#if defined(__i386__) || defined(__amd64__)
1734/*
1735 * Look for a MCFG table. If it is present, use the settings for
1736 * domain (segment) 0 to setup PCI config space access via the memory
1737 * map.
1738 */
1739static void
1740acpi_enable_pcie(void)
1741{
1742 ACPI_TABLE_HEADER *hdr;
1743 ACPI_MCFG_ALLOCATION *alloc, *end;
1744 ACPI_STATUS status;
1745
1746 status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr);
1747 if (ACPI_FAILURE(status))
1748 return;
1749
1750 end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length);
1751 alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1);
1752 while (alloc < end) {
1753 if (alloc->PciSegment == 0) {
1754 pcie_cfgregopen(alloc->Address, alloc->StartBusNumber,
1755 alloc->EndBusNumber);
1756 return;
1757 }
1758 alloc++;
1759 }
1760}
1761#endif
1762
1763/*
1764 * Scan all of the ACPI namespace and attach child devices.
1765 *
1766 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and
1767 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec.
1768 * However, in violation of the spec, some systems place their PCI link
1769 * devices in \, so we have to walk the whole namespace. We check the
1770 * type of namespace nodes, so this should be ok.
1771 */
1772static void
1773acpi_probe_children(device_t bus)
1774{
1775
1776 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1777
1778 /*
1779 * Scan the namespace and insert placeholders for all the devices that
1780 * we find. We also probe/attach any early devices.
1781 *
1782 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because
1783 * we want to create nodes for all devices, not just those that are
1784 * currently present. (This assumes that we don't want to create/remove
1785 * devices as they appear, which might be smarter.)
1786 */
1787 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n"));
1788 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, acpi_probe_child,
1789 NULL, bus, NULL);
1790
1791 /* Pre-allocate resources for our rman from any sysresource devices. */
1792 acpi_sysres_alloc(bus);
1793
1794 /* Reserve resources already allocated to children. */
1795 acpi_reserve_resources(bus);
1796
1797 /* Create any static children by calling device identify methods. */
1798 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n"));
1799 bus_generic_probe(bus);
1800
1801 /* Probe/attach all children, created statically and from the namespace. */
1802 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "acpi bus_generic_attach\n"));
1803 bus_generic_attach(bus);
1804
1805 /* Attach wake sysctls. */
1806 acpi_wake_sysctl_walk(bus);
1807
1808 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n"));
1809 return_VOID;
1810}
1811
1812/*
1813 * Determine the probe order for a given device.
1814 */
1815static void
1816acpi_probe_order(ACPI_HANDLE handle, int *order)
1817{
1818 ACPI_OBJECT_TYPE type;
1819
1820 /*
1821 * 0. CPUs
1822 * 1. I/O port and memory system resource holders
1823 * 2. Clocks and timers (to handle early accesses)
1824 * 3. Embedded controllers (to handle early accesses)
1825 * 4. PCI Link Devices
1826 */
1827 AcpiGetType(handle, &type);
1828 if (type == ACPI_TYPE_PROCESSOR)
1829 *order = 0;
1830 else if (acpi_MatchHid(handle, "PNP0C01") ||
1831 acpi_MatchHid(handle, "PNP0C02"))
1832 *order = 1;
1833 else if (acpi_MatchHid(handle, "PNP0100") ||
1834 acpi_MatchHid(handle, "PNP0103") ||
1835 acpi_MatchHid(handle, "PNP0B00"))
1836 *order = 2;
1837 else if (acpi_MatchHid(handle, "PNP0C09"))
1838 *order = 3;
1839 else if (acpi_MatchHid(handle, "PNP0C0F"))
1840 *order = 4;
1841}
1842
1843/*
1844 * Evaluate a child device and determine whether we might attach a device to
1845 * it.
1846 */
1847static ACPI_STATUS
1848acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status)
1849{
1850 struct acpi_prw_data prw;
1851 ACPI_OBJECT_TYPE type;
1852 ACPI_HANDLE h;
1853 device_t bus, child;
1854 char *handle_str;
1855 int order;
1856
1857 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1858
1859 if (acpi_disabled("children"))
1860 return_ACPI_STATUS (AE_OK);
1861
1862 /* Skip this device if we think we'll have trouble with it. */
1863 if (acpi_avoid(handle))
1864 return_ACPI_STATUS (AE_OK);
1865
1866 bus = (device_t)context;
1867 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) {
1868 handle_str = acpi_name(handle);
1869 switch (type) {
1870 case ACPI_TYPE_DEVICE:
1871 /*
1872 * Since we scan from \, be sure to skip system scope objects.
1873 * \_SB_ and \_TZ_ are defined in ACPICA as devices to work around
1874 * BIOS bugs. For example, \_SB_ is to allow \_SB_._INI to be run
1875 * during the intialization and \_TZ_ is to support Notify() on it.
1876 */
1877 if (strcmp(handle_str, "\\_SB_") == 0 ||
1878 strcmp(handle_str, "\\_TZ_") == 0)
1879 break;
1880 if (acpi_parse_prw(handle, &prw) == 0)
1881 AcpiSetupGpeForWake(handle, prw.gpe_handle, prw.gpe_bit);
1882
1883 /*
1884 * Ignore devices that do not have a _HID or _CID. They should
1885 * be discovered by other buses (e.g. the PCI bus driver).
1886 */
1887 if (!acpi_has_hid(handle))
1888 break;
1889 /* FALLTHROUGH */
1890 case ACPI_TYPE_PROCESSOR:
1891 case ACPI_TYPE_THERMAL:
1892 case ACPI_TYPE_POWER:
1893 /*
1894 * Create a placeholder device for this node. Sort the
1895 * placeholder so that the probe/attach passes will run
1896 * breadth-first. Orders less than ACPI_DEV_BASE_ORDER
1897 * are reserved for special objects (i.e., system
1898 * resources).
1899 */
1900 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str));
1901 order = level * 10 + ACPI_DEV_BASE_ORDER;
1902 acpi_probe_order(handle, &order);
1903 child = BUS_ADD_CHILD(bus, order, NULL, -1);
1904 if (child == NULL)
1905 break;
1906
1907 /* Associate the handle with the device_t and vice versa. */
1908 acpi_set_handle(child, handle);
1909 AcpiAttachData(handle, acpi_fake_objhandler, child);
1910
1911 /*
1912 * Check that the device is present. If it's not present,
1913 * leave it disabled (so that we have a device_t attached to
1914 * the handle, but we don't probe it).
1915 *
1916 * XXX PCI link devices sometimes report "present" but not
1917 * "functional" (i.e. if disabled). Go ahead and probe them
1918 * anyway since we may enable them later.
1919 */
1920 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) {
1921 /* Never disable PCI link devices. */
1922 if (acpi_MatchHid(handle, "PNP0C0F"))
1923 break;
1924 /*
1925 * Docking stations should remain enabled since the system
1926 * may be undocked at boot.
1927 */
1928 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h)))
1929 break;
1930
1931 device_disable(child);
1932 break;
1933 }
1934
1935 /*
1936 * Get the device's resource settings and attach them.
1937 * Note that if the device has _PRS but no _CRS, we need
1938 * to decide when it's appropriate to try to configure the
1939 * device. Ignore the return value here; it's OK for the
1940 * device not to have any resources.
1941 */
1942 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL);
1943 break;
1944 }
1945 }
1946
1947 return_ACPI_STATUS (AE_OK);
1948}
1949
1950/*
1951 * AcpiAttachData() requires an object handler but never uses it. This is a
1952 * placeholder object handler so we can store a device_t in an ACPI_HANDLE.
1953 */
1954void
1955acpi_fake_objhandler(ACPI_HANDLE h, void *data)
1956{
1957}
1958
1959static void
1960acpi_shutdown_final(void *arg, int howto)
1961{
1962 struct acpi_softc *sc = (struct acpi_softc *)arg;
1963 register_t intr;
1964 ACPI_STATUS status;
1965
1966 /*
1967 * XXX Shutdown code should only run on the BSP (cpuid 0).
1968 * Some chipsets do not power off the system correctly if called from
1969 * an AP.
1970 */
1971 if ((howto & RB_POWEROFF) != 0) {
1972 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5);
1973 if (ACPI_FAILURE(status)) {
1974 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n",
1975 AcpiFormatException(status));
1976 return;
1977 }
1978 device_printf(sc->acpi_dev, "Powering system off\n");
1979 intr = intr_disable();
|
1988 status = AcpiEnterSleepState(ACPI_STATE_S5, acpi_sleep_flags);
|
| 1980 status = AcpiEnterSleepState(ACPI_STATE_S5); |
1981 if (ACPI_FAILURE(status)) {
1982 intr_restore(intr);
1983 device_printf(sc->acpi_dev, "power-off failed - %s\n",
1984 AcpiFormatException(status));
1985 } else {
1986 DELAY(1000000);
1987 intr_restore(intr);
1988 device_printf(sc->acpi_dev, "power-off failed - timeout\n");
1989 }
1990 } else if ((howto & RB_HALT) == 0 && sc->acpi_handle_reboot) {
1991 /* Reboot using the reset register. */
1992 status = AcpiReset();
1993 if (ACPI_SUCCESS(status)) {
1994 DELAY(1000000);
1995 device_printf(sc->acpi_dev, "reset failed - timeout\n");
1996 } else if (status != AE_NOT_EXIST)
1997 device_printf(sc->acpi_dev, "reset failed - %s\n",
1998 AcpiFormatException(status));
1999 } else if (sc->acpi_do_disable && panicstr == NULL) {
2000 /*
2001 * Only disable ACPI if the user requested. On some systems, writing
2002 * the disable value to SMI_CMD hangs the system.
2003 */
2004 device_printf(sc->acpi_dev, "Shutting down\n");
2005 AcpiTerminate();
2006 }
2007}
2008
2009static void
2010acpi_enable_fixed_events(struct acpi_softc *sc)
2011{
2012 static int first_time = 1;
2013
2014 /* Enable and clear fixed events and install handlers. */
2015 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) {
2016 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON);
2017 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON,
2018 acpi_event_power_button_sleep, sc);
2019 if (first_time)
2020 device_printf(sc->acpi_dev, "Power Button (fixed)\n");
2021 }
2022 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) {
2023 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON);
2024 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON,
2025 acpi_event_sleep_button_sleep, sc);
2026 if (first_time)
2027 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n");
2028 }
2029
2030 first_time = 0;
2031}
2032
2033/*
2034 * Returns true if the device is actually present and should
2035 * be attached to. This requires the present, enabled, UI-visible
2036 * and diagnostics-passed bits to be set.
2037 */
2038BOOLEAN
2039acpi_DeviceIsPresent(device_t dev)
2040{
2041 ACPI_DEVICE_INFO *devinfo;
2042 ACPI_HANDLE h;
2043 BOOLEAN present;
2044
2045 if ((h = acpi_get_handle(dev)) == NULL ||
2046 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
2047 return (FALSE);
2048
2049 /* If no _STA method, must be present */
2050 present = (devinfo->Valid & ACPI_VALID_STA) == 0 ||
2051 ACPI_DEVICE_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE;
2052
2053 AcpiOsFree(devinfo);
2054 return (present);
2055}
2056
2057/*
2058 * Returns true if the battery is actually present and inserted.
2059 */
2060BOOLEAN
2061acpi_BatteryIsPresent(device_t dev)
2062{
2063 ACPI_DEVICE_INFO *devinfo;
2064 ACPI_HANDLE h;
2065 BOOLEAN present;
2066
2067 if ((h = acpi_get_handle(dev)) == NULL ||
2068 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
2069 return (FALSE);
2070
2071 /* If no _STA method, must be present */
2072 present = (devinfo->Valid & ACPI_VALID_STA) == 0 ||
2073 ACPI_BATTERY_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE;
2074
2075 AcpiOsFree(devinfo);
2076 return (present);
2077}
2078
2079/*
2080 * Returns true if a device has at least one valid device ID.
2081 */
2082static BOOLEAN
2083acpi_has_hid(ACPI_HANDLE h)
2084{
2085 ACPI_DEVICE_INFO *devinfo;
2086 BOOLEAN ret;
2087
2088 if (h == NULL ||
2089 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
2090 return (FALSE);
2091
2092 ret = FALSE;
2093 if ((devinfo->Valid & ACPI_VALID_HID) != 0)
2094 ret = TRUE;
2095 else if ((devinfo->Valid & ACPI_VALID_CID) != 0)
2096 if (devinfo->CompatibleIdList.Count > 0)
2097 ret = TRUE;
2098
2099 AcpiOsFree(devinfo);
2100 return (ret);
2101}
2102
2103/*
2104 * Match a HID string against a handle
2105 */
2106BOOLEAN
2107acpi_MatchHid(ACPI_HANDLE h, const char *hid)
2108{
2109 ACPI_DEVICE_INFO *devinfo;
2110 BOOLEAN ret;
2111 int i;
2112
2113 if (hid == NULL || h == NULL ||
2114 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
2115 return (FALSE);
2116
2117 ret = FALSE;
2118 if ((devinfo->Valid & ACPI_VALID_HID) != 0 &&
2119 strcmp(hid, devinfo->HardwareId.String) == 0)
2120 ret = TRUE;
2121 else if ((devinfo->Valid & ACPI_VALID_CID) != 0)
2122 for (i = 0; i < devinfo->CompatibleIdList.Count; i++) {
2123 if (strcmp(hid, devinfo->CompatibleIdList.Ids[i].String) == 0) {
2124 ret = TRUE;
2125 break;
2126 }
2127 }
2128
2129 AcpiOsFree(devinfo);
2130 return (ret);
2131}
2132
2133/*
2134 * Return the handle of a named object within our scope, ie. that of (parent)
2135 * or one if its parents.
2136 */
2137ACPI_STATUS
2138acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result)
2139{
2140 ACPI_HANDLE r;
2141 ACPI_STATUS status;
2142
2143 /* Walk back up the tree to the root */
2144 for (;;) {
2145 status = AcpiGetHandle(parent, path, &r);
2146 if (ACPI_SUCCESS(status)) {
2147 *result = r;
2148 return (AE_OK);
2149 }
2150 /* XXX Return error here? */
2151 if (status != AE_NOT_FOUND)
2152 return (AE_OK);
2153 if (ACPI_FAILURE(AcpiGetParent(parent, &r)))
2154 return (AE_NOT_FOUND);
2155 parent = r;
2156 }
2157}
2158
2159/*
2160 * Allocate a buffer with a preset data size.
2161 */
2162ACPI_BUFFER *
2163acpi_AllocBuffer(int size)
2164{
2165 ACPI_BUFFER *buf;
2166
2167 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL)
2168 return (NULL);
2169 buf->Length = size;
2170 buf->Pointer = (void *)(buf + 1);
2171 return (buf);
2172}
2173
2174ACPI_STATUS
2175acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number)
2176{
2177 ACPI_OBJECT arg1;
2178 ACPI_OBJECT_LIST args;
2179
2180 arg1.Type = ACPI_TYPE_INTEGER;
2181 arg1.Integer.Value = number;
2182 args.Count = 1;
2183 args.Pointer = &arg1;
2184
2185 return (AcpiEvaluateObject(handle, path, &args, NULL));
2186}
2187
2188/*
2189 * Evaluate a path that should return an integer.
2190 */
2191ACPI_STATUS
2192acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number)
2193{
2194 ACPI_STATUS status;
2195 ACPI_BUFFER buf;
2196 ACPI_OBJECT param;
2197
2198 if (handle == NULL)
2199 handle = ACPI_ROOT_OBJECT;
2200
2201 /*
2202 * Assume that what we've been pointed at is an Integer object, or
2203 * a method that will return an Integer.
2204 */
2205 buf.Pointer = ¶m;
2206 buf.Length = sizeof(param);
2207 status = AcpiEvaluateObject(handle, path, NULL, &buf);
2208 if (ACPI_SUCCESS(status)) {
2209 if (param.Type == ACPI_TYPE_INTEGER)
2210 *number = param.Integer.Value;
2211 else
2212 status = AE_TYPE;
2213 }
2214
2215 /*
2216 * In some applications, a method that's expected to return an Integer
2217 * may instead return a Buffer (probably to simplify some internal
2218 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer,
2219 * convert it into an Integer as best we can.
2220 *
2221 * This is a hack.
2222 */
2223 if (status == AE_BUFFER_OVERFLOW) {
2224 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) {
2225 status = AE_NO_MEMORY;
2226 } else {
2227 status = AcpiEvaluateObject(handle, path, NULL, &buf);
2228 if (ACPI_SUCCESS(status))
2229 status = acpi_ConvertBufferToInteger(&buf, number);
2230 AcpiOsFree(buf.Pointer);
2231 }
2232 }
2233 return (status);
2234}
2235
2236ACPI_STATUS
2237acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number)
2238{
2239 ACPI_OBJECT *p;
2240 UINT8 *val;
2241 int i;
2242
2243 p = (ACPI_OBJECT *)bufp->Pointer;
2244 if (p->Type == ACPI_TYPE_INTEGER) {
2245 *number = p->Integer.Value;
2246 return (AE_OK);
2247 }
2248 if (p->Type != ACPI_TYPE_BUFFER)
2249 return (AE_TYPE);
2250 if (p->Buffer.Length > sizeof(int))
2251 return (AE_BAD_DATA);
2252
2253 *number = 0;
2254 val = p->Buffer.Pointer;
2255 for (i = 0; i < p->Buffer.Length; i++)
2256 *number += val[i] << (i * 8);
2257 return (AE_OK);
2258}
2259
2260/*
2261 * Iterate over the elements of an a package object, calling the supplied
2262 * function for each element.
2263 *
2264 * XXX possible enhancement might be to abort traversal on error.
2265 */
2266ACPI_STATUS
2267acpi_ForeachPackageObject(ACPI_OBJECT *pkg,
2268 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg)
2269{
2270 ACPI_OBJECT *comp;
2271 int i;
2272
2273 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE)
2274 return (AE_BAD_PARAMETER);
2275
2276 /* Iterate over components */
2277 i = 0;
2278 comp = pkg->Package.Elements;
2279 for (; i < pkg->Package.Count; i++, comp++)
2280 func(comp, arg);
2281
2282 return (AE_OK);
2283}
2284
2285/*
2286 * Find the (index)th resource object in a set.
2287 */
2288ACPI_STATUS
2289acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp)
2290{
2291 ACPI_RESOURCE *rp;
2292 int i;
2293
2294 rp = (ACPI_RESOURCE *)buf->Pointer;
2295 i = index;
2296 while (i-- > 0) {
2297 /* Range check */
2298 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length))
2299 return (AE_BAD_PARAMETER);
2300
2301 /* Check for terminator */
2302 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0)
2303 return (AE_NOT_FOUND);
2304 rp = ACPI_NEXT_RESOURCE(rp);
2305 }
2306 if (resp != NULL)
2307 *resp = rp;
2308
2309 return (AE_OK);
2310}
2311
2312/*
2313 * Append an ACPI_RESOURCE to an ACPI_BUFFER.
2314 *
2315 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER
2316 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible
2317 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of
2318 * resources.
2319 */
2320#define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512
2321
2322ACPI_STATUS
2323acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res)
2324{
2325 ACPI_RESOURCE *rp;
2326 void *newp;
2327
2328 /* Initialise the buffer if necessary. */
2329 if (buf->Pointer == NULL) {
2330 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE;
2331 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL)
2332 return (AE_NO_MEMORY);
2333 rp = (ACPI_RESOURCE *)buf->Pointer;
2334 rp->Type = ACPI_RESOURCE_TYPE_END_TAG;
2335 rp->Length = 0;
2336 }
2337 if (res == NULL)
2338 return (AE_OK);
2339
2340 /*
2341 * Scan the current buffer looking for the terminator.
2342 * This will either find the terminator or hit the end
2343 * of the buffer and return an error.
2344 */
2345 rp = (ACPI_RESOURCE *)buf->Pointer;
2346 for (;;) {
2347 /* Range check, don't go outside the buffer */
2348 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length))
2349 return (AE_BAD_PARAMETER);
2350 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0)
2351 break;
2352 rp = ACPI_NEXT_RESOURCE(rp);
2353 }
2354
2355 /*
2356 * Check the size of the buffer and expand if required.
2357 *
2358 * Required size is:
2359 * size of existing resources before terminator +
2360 * size of new resource and header +
2361 * size of terminator.
2362 *
2363 * Note that this loop should really only run once, unless
2364 * for some reason we are stuffing a *really* huge resource.
2365 */
2366 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) +
2367 res->Length + ACPI_RS_SIZE_NO_DATA +
2368 ACPI_RS_SIZE_MIN) >= buf->Length) {
2369 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL)
2370 return (AE_NO_MEMORY);
2371 bcopy(buf->Pointer, newp, buf->Length);
2372 rp = (ACPI_RESOURCE *)((u_int8_t *)newp +
2373 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer));
2374 AcpiOsFree(buf->Pointer);
2375 buf->Pointer = newp;
2376 buf->Length += buf->Length;
2377 }
2378
2379 /* Insert the new resource. */
2380 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA);
2381
2382 /* And add the terminator. */
2383 rp = ACPI_NEXT_RESOURCE(rp);
2384 rp->Type = ACPI_RESOURCE_TYPE_END_TAG;
2385 rp->Length = 0;
2386
2387 return (AE_OK);
2388}
2389
2390/*
2391 * Set interrupt model.
2392 */
2393ACPI_STATUS
2394acpi_SetIntrModel(int model)
2395{
2396
2397 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model));
2398}
2399
2400/*
2401 * Walk subtables of a table and call a callback routine for each
2402 * subtable. The caller should provide the first subtable and a
2403 * pointer to the end of the table. This can be used to walk tables
2404 * such as MADT and SRAT that use subtable entries.
2405 */
2406void
2407acpi_walk_subtables(void *first, void *end, acpi_subtable_handler *handler,
2408 void *arg)
2409{
2410 ACPI_SUBTABLE_HEADER *entry;
2411
2412 for (entry = first; (void *)entry < end; ) {
2413 /* Avoid an infinite loop if we hit a bogus entry. */
2414 if (entry->Length < sizeof(ACPI_SUBTABLE_HEADER))
2415 return;
2416
2417 handler(entry, arg);
2418 entry = ACPI_ADD_PTR(ACPI_SUBTABLE_HEADER, entry, entry->Length);
2419 }
2420}
2421
2422/*
2423 * DEPRECATED. This interface has serious deficiencies and will be
2424 * removed.
2425 *
2426 * Immediately enter the sleep state. In the old model, acpiconf(8) ran
2427 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this.
2428 */
2429ACPI_STATUS
2430acpi_SetSleepState(struct acpi_softc *sc, int state)
2431{
2432 static int once;
2433
2434 if (!once) {
2435 device_printf(sc->acpi_dev,
2436"warning: acpi_SetSleepState() deprecated, need to update your software\n");
2437 once = 1;
2438 }
2439 return (acpi_EnterSleepState(sc, state));
2440}
2441
2442#if defined(__amd64__) || defined(__i386__)
2443static void
2444acpi_sleep_force_task(void *context)
2445{
2446 struct acpi_softc *sc = (struct acpi_softc *)context;
2447
2448 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate)))
2449 device_printf(sc->acpi_dev, "force sleep state S%d failed\n",
2450 sc->acpi_next_sstate);
2451}
2452
2453static void
2454acpi_sleep_force(void *arg)
2455{
2456 struct acpi_softc *sc = (struct acpi_softc *)arg;
2457
2458 device_printf(sc->acpi_dev,
2459 "suspend request timed out, forcing sleep now\n");
2460 /*
2461 * XXX Suspending from callout cause the freeze in DEVICE_SUSPEND().
2462 * Suspend from acpi_task thread in stead.
2463 */
2464 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER,
2465 acpi_sleep_force_task, sc)))
2466 device_printf(sc->acpi_dev, "AcpiOsExecute() for sleeping failed\n");
2467}
2468#endif
2469
2470/*
2471 * Request that the system enter the given suspend state. All /dev/apm
2472 * devices and devd(8) will be notified. Userland then has a chance to
2473 * save state and acknowledge the request. The system sleeps once all
2474 * acks are in.
2475 */
2476int
2477acpi_ReqSleepState(struct acpi_softc *sc, int state)
2478{
2479#if defined(__amd64__) || defined(__i386__)
2480 struct apm_clone_data *clone;
2481 ACPI_STATUS status;
2482
2483 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX)
2484 return (EINVAL);
2485 if (!acpi_sleep_states[state])
2486 return (EOPNOTSUPP);
2487
2488 /* If a suspend request is already in progress, just return. */
2489 if (sc->acpi_next_sstate != 0) {
2490 return (0);
2491 }
2492
2493 /* Wait until sleep is enabled. */
2494 while (sc->acpi_sleep_disabled) {
2495 AcpiOsSleep(1000);
2496 }
2497
2498 ACPI_LOCK(acpi);
2499
2500 sc->acpi_next_sstate = state;
2501
2502 /* S5 (soft-off) should be entered directly with no waiting. */
2503 if (state == ACPI_STATE_S5) {
2504 ACPI_UNLOCK(acpi);
2505 status = acpi_EnterSleepState(sc, state);
2506 return (ACPI_SUCCESS(status) ? 0 : ENXIO);
2507 }
2508
2509 /* Record the pending state and notify all apm devices. */
2510 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) {
2511 clone->notify_status = APM_EV_NONE;
2512 if ((clone->flags & ACPI_EVF_DEVD) == 0) {
2513 selwakeuppri(&clone->sel_read, PZERO);
2514 KNOTE_LOCKED(&clone->sel_read.si_note, 0);
2515 }
2516 }
2517
2518 /* If devd(8) is not running, immediately enter the sleep state. */
2519 if (!devctl_process_running()) {
2520 ACPI_UNLOCK(acpi);
2521 status = acpi_EnterSleepState(sc, state);
2522 return (ACPI_SUCCESS(status) ? 0 : ENXIO);
2523 }
2524
2525 /*
2526 * Set a timeout to fire if userland doesn't ack the suspend request
2527 * in time. This way we still eventually go to sleep if we were
2528 * overheating or running low on battery, even if userland is hung.
2529 * We cancel this timeout once all userland acks are in or the
2530 * suspend request is aborted.
2531 */
2532 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc);
2533 ACPI_UNLOCK(acpi);
2534
2535 /* Now notify devd(8) also. */
2536 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state);
2537
2538 return (0);
2539#else
2540 /* This platform does not support acpi suspend/resume. */
2541 return (EOPNOTSUPP);
2542#endif
2543}
2544
2545/*
2546 * Acknowledge (or reject) a pending sleep state. The caller has
2547 * prepared for suspend and is now ready for it to proceed. If the
2548 * error argument is non-zero, it indicates suspend should be cancelled
2549 * and gives an errno value describing why. Once all votes are in,
2550 * we suspend the system.
2551 */
2552int
2553acpi_AckSleepState(struct apm_clone_data *clone, int error)
2554{
2555#if defined(__amd64__) || defined(__i386__)
2556 struct acpi_softc *sc;
2557 int ret, sleeping;
2558
2559 /* If no pending sleep state, return an error. */
2560 ACPI_LOCK(acpi);
2561 sc = clone->acpi_sc;
2562 if (sc->acpi_next_sstate == 0) {
2563 ACPI_UNLOCK(acpi);
2564 return (ENXIO);
2565 }
2566
2567 /* Caller wants to abort suspend process. */
2568 if (error) {
2569 sc->acpi_next_sstate = 0;
2570 callout_stop(&sc->susp_force_to);
2571 device_printf(sc->acpi_dev,
2572 "listener on %s cancelled the pending suspend\n",
2573 devtoname(clone->cdev));
2574 ACPI_UNLOCK(acpi);
2575 return (0);
2576 }
2577
2578 /*
2579 * Mark this device as acking the suspend request. Then, walk through
2580 * all devices, seeing if they agree yet. We only count devices that
2581 * are writable since read-only devices couldn't ack the request.
2582 */
2583 sleeping = TRUE;
2584 clone->notify_status = APM_EV_ACKED;
2585 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) {
2586 if ((clone->flags & ACPI_EVF_WRITE) != 0 &&
2587 clone->notify_status != APM_EV_ACKED) {
2588 sleeping = FALSE;
2589 break;
2590 }
2591 }
2592
2593 /* If all devices have voted "yes", we will suspend now. */
2594 if (sleeping)
2595 callout_stop(&sc->susp_force_to);
2596 ACPI_UNLOCK(acpi);
2597 ret = 0;
2598 if (sleeping) {
2599 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate)))
2600 ret = ENODEV;
2601 }
2602 return (ret);
2603#else
2604 /* This platform does not support acpi suspend/resume. */
2605 return (EOPNOTSUPP);
2606#endif
2607}
2608
2609static void
2610acpi_sleep_enable(void *arg)
2611{
2612 struct acpi_softc *sc = (struct acpi_softc *)arg;
2613
2614 /* Reschedule if the system is not fully up and running. */
2615 if (!AcpiGbl_SystemAwakeAndRunning) {
2616 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME);
2617 return;
2618 }
2619
2620 ACPI_LOCK(acpi);
2621 sc->acpi_sleep_disabled = FALSE;
2622 ACPI_UNLOCK(acpi);
2623}
2624
2625static ACPI_STATUS
2626acpi_sleep_disable(struct acpi_softc *sc)
2627{
2628 ACPI_STATUS status;
2629
2630 /* Fail if the system is not fully up and running. */
2631 if (!AcpiGbl_SystemAwakeAndRunning)
2632 return (AE_ERROR);
2633
2634 ACPI_LOCK(acpi);
2635 status = sc->acpi_sleep_disabled ? AE_ERROR : AE_OK;
2636 sc->acpi_sleep_disabled = TRUE;
2637 ACPI_UNLOCK(acpi);
2638
2639 return (status);
2640}
2641
2642enum acpi_sleep_state {
2643 ACPI_SS_NONE,
2644 ACPI_SS_GPE_SET,
2645 ACPI_SS_DEV_SUSPEND,
2646 ACPI_SS_SLP_PREP,
2647 ACPI_SS_SLEPT,
2648};
2649
2650/*
2651 * Enter the desired system sleep state.
2652 *
2653 * Currently we support S1-S5 but S4 is only S4BIOS
2654 */
2655static ACPI_STATUS
2656acpi_EnterSleepState(struct acpi_softc *sc, int state)
2657{
2658 register_t intr;
2659 ACPI_STATUS status;
2660 enum acpi_sleep_state slp_state;
2661 int sleep_result;
2662
2663 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
2664
2665 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX)
2666 return_ACPI_STATUS (AE_BAD_PARAMETER);
2667 if (!acpi_sleep_states[state]) {
2668 device_printf(sc->acpi_dev, "Sleep state S%d not supported by BIOS\n",
2669 state);
2670 return (AE_SUPPORT);
2671 }
2672
2673 /* Re-entry once we're suspending is not allowed. */
2674 status = acpi_sleep_disable(sc);
2675 if (ACPI_FAILURE(status)) {
2676 device_printf(sc->acpi_dev,
2677 "suspend request ignored (not ready yet)\n");
2678 return (status);
2679 }
2680
2681 if (state == ACPI_STATE_S5) {
2682 /*
2683 * Shut down cleanly and power off. This will call us back through the
2684 * shutdown handlers.
2685 */
2686 shutdown_nice(RB_POWEROFF);
2687 return_ACPI_STATUS (AE_OK);
2688 }
2689
2690 EVENTHANDLER_INVOKE(power_suspend);
2691
2692 if (smp_started) {
2693 thread_lock(curthread);
2694 sched_bind(curthread, 0);
2695 thread_unlock(curthread);
2696 }
2697
2698 /*
2699 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE
2700 * drivers need this.
2701 */
2702 mtx_lock(&Giant);
2703
2704 slp_state = ACPI_SS_NONE;
2705
2706 sc->acpi_sstate = state;
2707
2708 /* Enable any GPEs as appropriate and requested by the user. */
2709 acpi_wake_prep_walk(state);
2710 slp_state = ACPI_SS_GPE_SET;
2711
2712 /*
2713 * Inform all devices that we are going to sleep. If at least one
2714 * device fails, DEVICE_SUSPEND() automatically resumes the tree.
2715 *
2716 * XXX Note that a better two-pass approach with a 'veto' pass
2717 * followed by a "real thing" pass would be better, but the current
2718 * bus interface does not provide for this.
2719 */
2720 if (DEVICE_SUSPEND(root_bus) != 0) {
2721 device_printf(sc->acpi_dev, "device_suspend failed\n");
2722 goto backout;
2723 }
2724 slp_state = ACPI_SS_DEV_SUSPEND;
2725
2726 /* If testing device suspend only, back out of everything here. */
2727 if (acpi_susp_bounce)
2728 goto backout;
2729
2730 status = AcpiEnterSleepStatePrep(state);
2731 if (ACPI_FAILURE(status)) {
2732 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n",
2733 AcpiFormatException(status));
2734 goto backout;
2735 }
2736 slp_state = ACPI_SS_SLP_PREP;
2737
2738 if (sc->acpi_sleep_delay > 0)
2739 DELAY(sc->acpi_sleep_delay * 1000000);
2740
2741 intr = intr_disable();
2742 if (state != ACPI_STATE_S1) {
2743 sleep_result = acpi_sleep_machdep(sc, state);
2744 acpi_wakeup_machdep(sc, state, sleep_result, 0);
|
2753 AcpiLeaveSleepStatePrep(state, acpi_sleep_flags);
|
| 2745 AcpiLeaveSleepStatePrep(state); |
2746 intr_restore(intr);
2747
2748 /* call acpi_wakeup_machdep() again with interrupt enabled */
2749 acpi_wakeup_machdep(sc, state, sleep_result, 1);
2750
2751 if (sleep_result == -1)
2752 goto backout;
2753
2754 /* Re-enable ACPI hardware on wakeup from sleep state 4. */
2755 if (state == ACPI_STATE_S4)
2756 AcpiEnable();
2757 } else {
|
2766 status = AcpiEnterSleepState(state, acpi_sleep_flags);
2767 AcpiLeaveSleepStatePrep(state, acpi_sleep_flags);
|
2758 status = AcpiEnterSleepState(state);
2759 AcpiLeaveSleepStatePrep(state); |
2760 intr_restore(intr);
2761 if (ACPI_FAILURE(status)) {
2762 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n",
2763 AcpiFormatException(status));
2764 goto backout;
2765 }
2766 }
2767 slp_state = ACPI_SS_SLEPT;
2768
2769 /*
2770 * Back out state according to how far along we got in the suspend
2771 * process. This handles both the error and success cases.
2772 */
2773backout:
2774 if (slp_state >= ACPI_SS_GPE_SET) {
2775 acpi_wake_prep_walk(state);
2776 sc->acpi_sstate = ACPI_STATE_S0;
2777 }
2778 if (slp_state >= ACPI_SS_DEV_SUSPEND)
2779 DEVICE_RESUME(root_bus);
2780 if (slp_state >= ACPI_SS_SLP_PREP)
2781 AcpiLeaveSleepState(state);
2782 if (slp_state >= ACPI_SS_SLEPT) {
2783 acpi_resync_clock(sc);
2784 acpi_enable_fixed_events(sc);
2785 }
2786 sc->acpi_next_sstate = 0;
2787
2788 mtx_unlock(&Giant);
2789
2790 if (smp_started) {
2791 thread_lock(curthread);
2792 sched_unbind(curthread);
2793 thread_unlock(curthread);
2794 }
2795
2796 EVENTHANDLER_INVOKE(power_resume);
2797
2798 /* Allow another sleep request after a while. */
2799 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME);
2800
2801 /* Run /etc/rc.resume after we are back. */
2802 if (devctl_process_running())
2803 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state);
2804
2805 return_ACPI_STATUS (status);
2806}
2807
2808static void
2809acpi_resync_clock(struct acpi_softc *sc)
2810{
2811#ifdef __amd64__
2812 if (!acpi_reset_clock)
2813 return;
2814
2815 /*
2816 * Warm up timecounter again and reset system clock.
2817 */
2818 (void)timecounter->tc_get_timecount(timecounter);
2819 (void)timecounter->tc_get_timecount(timecounter);
2820 inittodr(time_second + sc->acpi_sleep_delay);
2821#endif
2822}
2823
2824/* Enable or disable the device's wake GPE. */
2825int
2826acpi_wake_set_enable(device_t dev, int enable)
2827{
2828 struct acpi_prw_data prw;
2829 ACPI_STATUS status;
2830 int flags;
2831
2832 /* Make sure the device supports waking the system and get the GPE. */
2833 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0)
2834 return (ENXIO);
2835
2836 flags = acpi_get_flags(dev);
2837 if (enable) {
2838 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit,
2839 ACPI_GPE_ENABLE);
2840 if (ACPI_FAILURE(status)) {
2841 device_printf(dev, "enable wake failed\n");
2842 return (ENXIO);
2843 }
2844 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED);
2845 } else {
2846 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit,
2847 ACPI_GPE_DISABLE);
2848 if (ACPI_FAILURE(status)) {
2849 device_printf(dev, "disable wake failed\n");
2850 return (ENXIO);
2851 }
2852 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED);
2853 }
2854
2855 return (0);
2856}
2857
2858static int
2859acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate)
2860{
2861 struct acpi_prw_data prw;
2862 device_t dev;
2863
2864 /* Check that this is a wake-capable device and get its GPE. */
2865 if (acpi_parse_prw(handle, &prw) != 0)
2866 return (ENXIO);
2867 dev = acpi_get_device(handle);
2868
2869 /*
2870 * The destination sleep state must be less than (i.e., higher power)
2871 * or equal to the value specified by _PRW. If this GPE cannot be
2872 * enabled for the next sleep state, then disable it. If it can and
2873 * the user requested it be enabled, turn on any required power resources
2874 * and set _PSW.
2875 */
2876 if (sstate > prw.lowest_wake) {
2877 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_DISABLE);
2878 if (bootverbose)
2879 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n",
2880 acpi_name(handle), sstate);
2881 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) {
2882 acpi_pwr_wake_enable(handle, 1);
2883 acpi_SetInteger(handle, "_PSW", 1);
2884 if (bootverbose)
2885 device_printf(dev, "wake_prep enabled for %s (S%d)\n",
2886 acpi_name(handle), sstate);
2887 }
2888
2889 return (0);
2890}
2891
2892static int
2893acpi_wake_run_prep(ACPI_HANDLE handle, int sstate)
2894{
2895 struct acpi_prw_data prw;
2896 device_t dev;
2897
2898 /*
2899 * Check that this is a wake-capable device and get its GPE. Return
2900 * now if the user didn't enable this device for wake.
2901 */
2902 if (acpi_parse_prw(handle, &prw) != 0)
2903 return (ENXIO);
2904 dev = acpi_get_device(handle);
2905 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0)
2906 return (0);
2907
2908 /*
2909 * If this GPE couldn't be enabled for the previous sleep state, it was
2910 * disabled before going to sleep so re-enable it. If it was enabled,
2911 * clear _PSW and turn off any power resources it used.
2912 */
2913 if (sstate > prw.lowest_wake) {
2914 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_ENABLE);
2915 if (bootverbose)
2916 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle));
2917 } else {
2918 acpi_SetInteger(handle, "_PSW", 0);
2919 acpi_pwr_wake_enable(handle, 0);
2920 if (bootverbose)
2921 device_printf(dev, "run_prep cleaned up for %s\n",
2922 acpi_name(handle));
2923 }
2924
2925 return (0);
2926}
2927
2928static ACPI_STATUS
2929acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status)
2930{
2931 int sstate;
2932
2933 /* If suspending, run the sleep prep function, otherwise wake. */
2934 sstate = *(int *)context;
2935 if (AcpiGbl_SystemAwakeAndRunning)
2936 acpi_wake_sleep_prep(handle, sstate);
2937 else
2938 acpi_wake_run_prep(handle, sstate);
2939 return (AE_OK);
2940}
2941
2942/* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */
2943static int
2944acpi_wake_prep_walk(int sstate)
2945{
2946 ACPI_HANDLE sb_handle;
2947
2948 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle)))
2949 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100,
2950 acpi_wake_prep, NULL, &sstate, NULL);
2951 return (0);
2952}
2953
2954/* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */
2955static int
2956acpi_wake_sysctl_walk(device_t dev)
2957{
2958 int error, i, numdevs;
2959 device_t *devlist;
2960 device_t child;
2961 ACPI_STATUS status;
2962
2963 error = device_get_children(dev, &devlist, &numdevs);
2964 if (error != 0 || numdevs == 0) {
2965 if (numdevs == 0)
2966 free(devlist, M_TEMP);
2967 return (error);
2968 }
2969 for (i = 0; i < numdevs; i++) {
2970 child = devlist[i];
2971 acpi_wake_sysctl_walk(child);
2972 if (!device_is_attached(child))
2973 continue;
2974 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL);
2975 if (ACPI_SUCCESS(status)) {
2976 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child),
2977 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO,
2978 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0,
2979 acpi_wake_set_sysctl, "I", "Device set to wake the system");
2980 }
2981 }
2982 free(devlist, M_TEMP);
2983
2984 return (0);
2985}
2986
2987/* Enable or disable wake from userland. */
2988static int
2989acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS)
2990{
2991 int enable, error;
2992 device_t dev;
2993
2994 dev = (device_t)arg1;
2995 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0;
2996
2997 error = sysctl_handle_int(oidp, &enable, 0, req);
2998 if (error != 0 || req->newptr == NULL)
2999 return (error);
3000 if (enable != 0 && enable != 1)
3001 return (EINVAL);
3002
3003 return (acpi_wake_set_enable(dev, enable));
3004}
3005
3006/* Parse a device's _PRW into a structure. */
3007int
3008acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw)
3009{
3010 ACPI_STATUS status;
3011 ACPI_BUFFER prw_buffer;
3012 ACPI_OBJECT *res, *res2;
3013 int error, i, power_count;
3014
3015 if (h == NULL || prw == NULL)
3016 return (EINVAL);
3017
3018 /*
3019 * The _PRW object (7.2.9) is only required for devices that have the
3020 * ability to wake the system from a sleeping state.
3021 */
3022 error = EINVAL;
3023 prw_buffer.Pointer = NULL;
3024 prw_buffer.Length = ACPI_ALLOCATE_BUFFER;
3025 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer);
3026 if (ACPI_FAILURE(status))
3027 return (ENOENT);
3028 res = (ACPI_OBJECT *)prw_buffer.Pointer;
3029 if (res == NULL)
3030 return (ENOENT);
3031 if (!ACPI_PKG_VALID(res, 2))
3032 goto out;
3033
3034 /*
3035 * Element 1 of the _PRW object:
3036 * The lowest power system sleeping state that can be entered while still
3037 * providing wake functionality. The sleeping state being entered must
3038 * be less than (i.e., higher power) or equal to this value.
3039 */
3040 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0)
3041 goto out;
3042
3043 /*
3044 * Element 0 of the _PRW object:
3045 */
3046 switch (res->Package.Elements[0].Type) {
3047 case ACPI_TYPE_INTEGER:
3048 /*
3049 * If the data type of this package element is numeric, then this
3050 * _PRW package element is the bit index in the GPEx_EN, in the
3051 * GPE blocks described in the FADT, of the enable bit that is
3052 * enabled for the wake event.
3053 */
3054 prw->gpe_handle = NULL;
3055 prw->gpe_bit = res->Package.Elements[0].Integer.Value;
3056 error = 0;
3057 break;
3058 case ACPI_TYPE_PACKAGE:
3059 /*
3060 * If the data type of this package element is a package, then this
3061 * _PRW package element is itself a package containing two
3062 * elements. The first is an object reference to the GPE Block
3063 * device that contains the GPE that will be triggered by the wake
3064 * event. The second element is numeric and it contains the bit
3065 * index in the GPEx_EN, in the GPE Block referenced by the
3066 * first element in the package, of the enable bit that is enabled for
3067 * the wake event.
3068 *
3069 * For example, if this field is a package then it is of the form:
3070 * Package() {\_SB.PCI0.ISA.GPE, 2}
3071 */
3072 res2 = &res->Package.Elements[0];
3073 if (!ACPI_PKG_VALID(res2, 2))
3074 goto out;
3075 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]);
3076 if (prw->gpe_handle == NULL)
3077 goto out;
3078 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0)
3079 goto out;
3080 error = 0;
3081 break;
3082 default:
3083 goto out;
3084 }
3085
3086 /* Elements 2 to N of the _PRW object are power resources. */
3087 power_count = res->Package.Count - 2;
3088 if (power_count > ACPI_PRW_MAX_POWERRES) {
3089 printf("ACPI device %s has too many power resources\n", acpi_name(h));
3090 power_count = 0;
3091 }
3092 prw->power_res_count = power_count;
3093 for (i = 0; i < power_count; i++)
3094 prw->power_res[i] = res->Package.Elements[i];
3095
3096out:
3097 if (prw_buffer.Pointer != NULL)
3098 AcpiOsFree(prw_buffer.Pointer);
3099 return (error);
3100}
3101
3102/*
3103 * ACPI Event Handlers
3104 */
3105
3106/* System Event Handlers (registered by EVENTHANDLER_REGISTER) */
3107
3108static void
3109acpi_system_eventhandler_sleep(void *arg, int state)
3110{
3111 struct acpi_softc *sc = (struct acpi_softc *)arg;
3112 int ret;
3113
3114 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
3115
3116 /* Check if button action is disabled or unknown. */
3117 if (state == ACPI_STATE_UNKNOWN)
3118 return;
3119
3120 /* Request that the system prepare to enter the given suspend state. */
3121 ret = acpi_ReqSleepState(sc, state);
3122 if (ret != 0)
3123 device_printf(sc->acpi_dev,
3124 "request to enter state S%d failed (err %d)\n", state, ret);
3125
3126 return_VOID;
3127}
3128
3129static void
3130acpi_system_eventhandler_wakeup(void *arg, int state)
3131{
3132
3133 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
3134
3135 /* Currently, nothing to do for wakeup. */
3136
3137 return_VOID;
3138}
3139
3140/*
3141 * ACPICA Event Handlers (FixedEvent, also called from button notify handler)
3142 */
3143static void
3144acpi_invoke_sleep_eventhandler(void *context)
3145{
3146
3147 EVENTHANDLER_INVOKE(acpi_sleep_event, *(int *)context);
3148}
3149
3150static void
3151acpi_invoke_wake_eventhandler(void *context)
3152{
3153
3154 EVENTHANDLER_INVOKE(acpi_wakeup_event, *(int *)context);
3155}
3156
3157UINT32
3158acpi_event_power_button_sleep(void *context)
3159{
3160 struct acpi_softc *sc = (struct acpi_softc *)context;
3161
3162 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
3163
3164 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER,
3165 acpi_invoke_sleep_eventhandler, &sc->acpi_power_button_sx)))
3166 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
3167 return_VALUE (ACPI_INTERRUPT_HANDLED);
3168}
3169
3170UINT32
3171acpi_event_power_button_wake(void *context)
3172{
3173 struct acpi_softc *sc = (struct acpi_softc *)context;
3174
3175 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
3176
3177 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER,
3178 acpi_invoke_wake_eventhandler, &sc->acpi_power_button_sx)))
3179 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
3180 return_VALUE (ACPI_INTERRUPT_HANDLED);
3181}
3182
3183UINT32
3184acpi_event_sleep_button_sleep(void *context)
3185{
3186 struct acpi_softc *sc = (struct acpi_softc *)context;
3187
3188 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
3189
3190 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER,
3191 acpi_invoke_sleep_eventhandler, &sc->acpi_sleep_button_sx)))
3192 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
3193 return_VALUE (ACPI_INTERRUPT_HANDLED);
3194}
3195
3196UINT32
3197acpi_event_sleep_button_wake(void *context)
3198{
3199 struct acpi_softc *sc = (struct acpi_softc *)context;
3200
3201 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
3202
3203 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER,
3204 acpi_invoke_wake_eventhandler, &sc->acpi_sleep_button_sx)))
3205 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
3206 return_VALUE (ACPI_INTERRUPT_HANDLED);
3207}
3208
3209/*
3210 * XXX This static buffer is suboptimal. There is no locking so only
3211 * use this for single-threaded callers.
3212 */
3213char *
3214acpi_name(ACPI_HANDLE handle)
3215{
3216 ACPI_BUFFER buf;
3217 static char data[256];
3218
3219 buf.Length = sizeof(data);
3220 buf.Pointer = data;
3221
3222 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf)))
3223 return (data);
3224 return ("(unknown)");
3225}
3226
3227/*
3228 * Debugging/bug-avoidance. Avoid trying to fetch info on various
3229 * parts of the namespace.
3230 */
3231int
3232acpi_avoid(ACPI_HANDLE handle)
3233{
3234 char *cp, *env, *np;
3235 int len;
3236
3237 np = acpi_name(handle);
3238 if (*np == '\\')
3239 np++;
3240 if ((env = getenv("debug.acpi.avoid")) == NULL)
3241 return (0);
3242
3243 /* Scan the avoid list checking for a match */
3244 cp = env;
3245 for (;;) {
3246 while (*cp != 0 && isspace(*cp))
3247 cp++;
3248 if (*cp == 0)
3249 break;
3250 len = 0;
3251 while (cp[len] != 0 && !isspace(cp[len]))
3252 len++;
3253 if (!strncmp(cp, np, len)) {
3254 freeenv(env);
3255 return(1);
3256 }
3257 cp += len;
3258 }
3259 freeenv(env);
3260
3261 return (0);
3262}
3263
3264/*
3265 * Debugging/bug-avoidance. Disable ACPI subsystem components.
3266 */
3267int
3268acpi_disabled(char *subsys)
3269{
3270 char *cp, *env;
3271 int len;
3272
3273 if ((env = getenv("debug.acpi.disabled")) == NULL)
3274 return (0);
3275 if (strcmp(env, "all") == 0) {
3276 freeenv(env);
3277 return (1);
3278 }
3279
3280 /* Scan the disable list, checking for a match. */
3281 cp = env;
3282 for (;;) {
3283 while (*cp != '\0' && isspace(*cp))
3284 cp++;
3285 if (*cp == '\0')
3286 break;
3287 len = 0;
3288 while (cp[len] != '\0' && !isspace(cp[len]))
3289 len++;
3290 if (strncmp(cp, subsys, len) == 0) {
3291 freeenv(env);
3292 return (1);
3293 }
3294 cp += len;
3295 }
3296 freeenv(env);
3297
3298 return (0);
3299}
3300
3301/*
3302 * Control interface.
3303 *
3304 * We multiplex ioctls for all participating ACPI devices here. Individual
3305 * drivers wanting to be accessible via /dev/acpi should use the
3306 * register/deregister interface to make their handlers visible.
3307 */
3308struct acpi_ioctl_hook
3309{
3310 TAILQ_ENTRY(acpi_ioctl_hook) link;
3311 u_long cmd;
3312 acpi_ioctl_fn fn;
3313 void *arg;
3314};
3315
3316static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks;
3317static int acpi_ioctl_hooks_initted;
3318
3319int
3320acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg)
3321{
3322 struct acpi_ioctl_hook *hp;
3323
3324 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL)
3325 return (ENOMEM);
3326 hp->cmd = cmd;
3327 hp->fn = fn;
3328 hp->arg = arg;
3329
3330 ACPI_LOCK(acpi);
3331 if (acpi_ioctl_hooks_initted == 0) {
3332 TAILQ_INIT(&acpi_ioctl_hooks);
3333 acpi_ioctl_hooks_initted = 1;
3334 }
3335 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link);
3336 ACPI_UNLOCK(acpi);
3337
3338 return (0);
3339}
3340
3341void
3342acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn)
3343{
3344 struct acpi_ioctl_hook *hp;
3345
3346 ACPI_LOCK(acpi);
3347 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link)
3348 if (hp->cmd == cmd && hp->fn == fn)
3349 break;
3350
3351 if (hp != NULL) {
3352 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link);
3353 free(hp, M_ACPIDEV);
3354 }
3355 ACPI_UNLOCK(acpi);
3356}
3357
3358static int
3359acpiopen(struct cdev *dev, int flag, int fmt, struct thread *td)
3360{
3361 return (0);
3362}
3363
3364static int
3365acpiclose(struct cdev *dev, int flag, int fmt, struct thread *td)
3366{
3367 return (0);
3368}
3369
3370static int
3371acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
3372{
3373 struct acpi_softc *sc;
3374 struct acpi_ioctl_hook *hp;
3375 int error, state;
3376
3377 error = 0;
3378 hp = NULL;
3379 sc = dev->si_drv1;
3380
3381 /*
3382 * Scan the list of registered ioctls, looking for handlers.
3383 */
3384 ACPI_LOCK(acpi);
3385 if (acpi_ioctl_hooks_initted)
3386 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) {
3387 if (hp->cmd == cmd)
3388 break;
3389 }
3390 ACPI_UNLOCK(acpi);
3391 if (hp)
3392 return (hp->fn(cmd, addr, hp->arg));
3393
3394 /*
3395 * Core ioctls are not permitted for non-writable user.
3396 * Currently, other ioctls just fetch information.
3397 * Not changing system behavior.
3398 */
3399 if ((flag & FWRITE) == 0)
3400 return (EPERM);
3401
3402 /* Core system ioctls. */
3403 switch (cmd) {
3404 case ACPIIO_REQSLPSTATE:
3405 state = *(int *)addr;
3406 if (state != ACPI_STATE_S5)
3407 return (acpi_ReqSleepState(sc, state));
3408 device_printf(sc->acpi_dev, "power off via acpi ioctl not supported\n");
3409 error = EOPNOTSUPP;
3410 break;
3411 case ACPIIO_ACKSLPSTATE:
3412 error = *(int *)addr;
3413 error = acpi_AckSleepState(sc->acpi_clone, error);
3414 break;
3415 case ACPIIO_SETSLPSTATE: /* DEPRECATED */
3416 state = *(int *)addr;
3417 if (state < ACPI_STATE_S0 || state > ACPI_S_STATES_MAX)
3418 return (EINVAL);
3419 if (!acpi_sleep_states[state])
3420 return (EOPNOTSUPP);
3421 if (ACPI_FAILURE(acpi_SetSleepState(sc, state)))
3422 error = ENXIO;
3423 break;
3424 default:
3425 error = ENXIO;
3426 break;
3427 }
3428
3429 return (error);
3430}
3431
3432static int
3433acpi_sname2sstate(const char *sname)
3434{
3435 int sstate;
3436
3437 if (toupper(sname[0]) == 'S') {
3438 sstate = sname[1] - '0';
3439 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5 &&
3440 sname[2] == '\0')
3441 return (sstate);
3442 } else if (strcasecmp(sname, "NONE") == 0)
3443 return (ACPI_STATE_UNKNOWN);
3444 return (-1);
3445}
3446
3447static const char *
3448acpi_sstate2sname(int sstate)
3449{
3450 static const char *snames[] = { "S0", "S1", "S2", "S3", "S4", "S5" };
3451
3452 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5)
3453 return (snames[sstate]);
3454 else if (sstate == ACPI_STATE_UNKNOWN)
3455 return ("NONE");
3456 return (NULL);
3457}
3458
3459static int
3460acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
3461{
3462 int error;
3463 struct sbuf sb;
3464 UINT8 state;
3465
3466 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND);
3467 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++)
3468 if (acpi_sleep_states[state])
3469 sbuf_printf(&sb, "%s ", acpi_sstate2sname(state));
3470 sbuf_trim(&sb);
3471 sbuf_finish(&sb);
3472 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req);
3473 sbuf_delete(&sb);
3474 return (error);
3475}
3476
3477static int
3478acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
3479{
3480 char sleep_state[10];
3481 int error, new_state, old_state;
3482
3483 old_state = *(int *)oidp->oid_arg1;
3484 strlcpy(sleep_state, acpi_sstate2sname(old_state), sizeof(sleep_state));
3485 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req);
3486 if (error == 0 && req->newptr != NULL) {
3487 new_state = acpi_sname2sstate(sleep_state);
3488 if (new_state < ACPI_STATE_S1)
3489 return (EINVAL);
3490 if (new_state < ACPI_S_STATE_COUNT && !acpi_sleep_states[new_state])
3491 return (EOPNOTSUPP);
3492 if (new_state != old_state)
3493 *(int *)oidp->oid_arg1 = new_state;
3494 }
3495 return (error);
3496}
3497
3498/* Inform devctl(4) when we receive a Notify. */
3499void
3500acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify)
3501{
3502 char notify_buf[16];
3503 ACPI_BUFFER handle_buf;
3504 ACPI_STATUS status;
3505
3506 if (subsystem == NULL)
3507 return;
3508
3509 handle_buf.Pointer = NULL;
3510 handle_buf.Length = ACPI_ALLOCATE_BUFFER;
3511 status = AcpiNsHandleToPathname(h, &handle_buf);
3512 if (ACPI_FAILURE(status))
3513 return;
3514 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify);
3515 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf);
3516 AcpiOsFree(handle_buf.Pointer);
3517}
3518
3519#ifdef ACPI_DEBUG
3520/*
3521 * Support for parsing debug options from the kernel environment.
3522 *
3523 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers
3524 * by specifying the names of the bits in the debug.acpi.layer and
3525 * debug.acpi.level environment variables. Bits may be unset by
3526 * prefixing the bit name with !.
3527 */
3528struct debugtag
3529{
3530 char *name;
3531 UINT32 value;
3532};
3533
3534static struct debugtag dbg_layer[] = {
3535 {"ACPI_UTILITIES", ACPI_UTILITIES},
3536 {"ACPI_HARDWARE", ACPI_HARDWARE},
3537 {"ACPI_EVENTS", ACPI_EVENTS},
3538 {"ACPI_TABLES", ACPI_TABLES},
3539 {"ACPI_NAMESPACE", ACPI_NAMESPACE},
3540 {"ACPI_PARSER", ACPI_PARSER},
3541 {"ACPI_DISPATCHER", ACPI_DISPATCHER},
3542 {"ACPI_EXECUTER", ACPI_EXECUTER},
3543 {"ACPI_RESOURCES", ACPI_RESOURCES},
3544 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER},
3545 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES},
3546 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER},
3547 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS},
3548
3549 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER},
3550 {"ACPI_BATTERY", ACPI_BATTERY},
3551 {"ACPI_BUS", ACPI_BUS},
3552 {"ACPI_BUTTON", ACPI_BUTTON},
3553 {"ACPI_EC", ACPI_EC},
3554 {"ACPI_FAN", ACPI_FAN},
3555 {"ACPI_POWERRES", ACPI_POWERRES},
3556 {"ACPI_PROCESSOR", ACPI_PROCESSOR},
3557 {"ACPI_THERMAL", ACPI_THERMAL},
3558 {"ACPI_TIMER", ACPI_TIMER},
3559 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS},
3560 {NULL, 0}
3561};
3562
3563static struct debugtag dbg_level[] = {
3564 {"ACPI_LV_INIT", ACPI_LV_INIT},
3565 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT},
3566 {"ACPI_LV_INFO", ACPI_LV_INFO},
3567 {"ACPI_LV_REPAIR", ACPI_LV_REPAIR},
3568 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS},
3569
3570 /* Trace verbosity level 1 [Standard Trace Level] */
3571 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES},
3572 {"ACPI_LV_PARSE", ACPI_LV_PARSE},
3573 {"ACPI_LV_LOAD", ACPI_LV_LOAD},
3574 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH},
3575 {"ACPI_LV_EXEC", ACPI_LV_EXEC},
3576 {"ACPI_LV_NAMES", ACPI_LV_NAMES},
3577 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION},
3578 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD},
3579 {"ACPI_LV_TABLES", ACPI_LV_TABLES},
3580 {"ACPI_LV_VALUES", ACPI_LV_VALUES},
3581 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS},
3582 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES},
3583 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS},
3584 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE},
3585 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1},
3586
3587 /* Trace verbosity level 2 [Function tracing and memory allocation] */
3588 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS},
3589 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS},
3590 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS},
3591 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2},
3592 {"ACPI_LV_ALL", ACPI_LV_ALL},
3593
3594 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */
3595 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX},
3596 {"ACPI_LV_THREADS", ACPI_LV_THREADS},
3597 {"ACPI_LV_IO", ACPI_LV_IO},
3598 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS},
3599 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3},
3600
3601 /* Exceptionally verbose output -- also used in the global "DebugLevel" */
3602 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE},
3603 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO},
3604 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES},
3605 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS},
3606 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE},
3607 {NULL, 0}
3608};
3609
3610static void
3611acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag)
3612{
3613 char *ep;
3614 int i, l;
3615 int set;
3616
3617 while (*cp) {
3618 if (isspace(*cp)) {
3619 cp++;
3620 continue;
3621 }
3622 ep = cp;
3623 while (*ep && !isspace(*ep))
3624 ep++;
3625 if (*cp == '!') {
3626 set = 0;
3627 cp++;
3628 if (cp == ep)
3629 continue;
3630 } else {
3631 set = 1;
3632 }
3633 l = ep - cp;
3634 for (i = 0; tag[i].name != NULL; i++) {
3635 if (!strncmp(cp, tag[i].name, l)) {
3636 if (set)
3637 *flag |= tag[i].value;
3638 else
3639 *flag &= ~tag[i].value;
3640 }
3641 }
3642 cp = ep;
3643 }
3644}
3645
3646static void
3647acpi_set_debugging(void *junk)
3648{
3649 char *layer, *level;
3650
3651 if (cold) {
3652 AcpiDbgLayer = 0;
3653 AcpiDbgLevel = 0;
3654 }
3655
3656 layer = getenv("debug.acpi.layer");
3657 level = getenv("debug.acpi.level");
3658 if (layer == NULL && level == NULL)
3659 return;
3660
3661 printf("ACPI set debug");
3662 if (layer != NULL) {
3663 if (strcmp("NONE", layer) != 0)
3664 printf(" layer '%s'", layer);
3665 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer);
3666 freeenv(layer);
3667 }
3668 if (level != NULL) {
3669 if (strcmp("NONE", level) != 0)
3670 printf(" level '%s'", level);
3671 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel);
3672 freeenv(level);
3673 }
3674 printf("\n");
3675}
3676
3677SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging,
3678 NULL);
3679
3680static int
3681acpi_debug_sysctl(SYSCTL_HANDLER_ARGS)
3682{
3683 int error, *dbg;
3684 struct debugtag *tag;
3685 struct sbuf sb;
3686
3687 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL)
3688 return (ENOMEM);
3689 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) {
3690 tag = &dbg_layer[0];
3691 dbg = &AcpiDbgLayer;
3692 } else {
3693 tag = &dbg_level[0];
3694 dbg = &AcpiDbgLevel;
3695 }
3696
3697 /* Get old values if this is a get request. */
3698 ACPI_SERIAL_BEGIN(acpi);
3699 if (*dbg == 0) {
3700 sbuf_cpy(&sb, "NONE");
3701 } else if (req->newptr == NULL) {
3702 for (; tag->name != NULL; tag++) {
3703 if ((*dbg & tag->value) == tag->value)
3704 sbuf_printf(&sb, "%s ", tag->name);
3705 }
3706 }
3707 sbuf_trim(&sb);
3708 sbuf_finish(&sb);
3709
3710 /* Copy out the old values to the user. */
3711 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb));
3712 sbuf_delete(&sb);
3713
3714 /* If the user is setting a string, parse it. */
3715 if (error == 0 && req->newptr != NULL) {
3716 *dbg = 0;
3717 setenv((char *)oidp->oid_arg1, (char *)req->newptr);
3718 acpi_set_debugging(NULL);
3719 }
3720 ACPI_SERIAL_END(acpi);
3721
3722 return (error);
3723}
3724
3725SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING,
3726 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", "");
3727SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING,
3728 "debug.acpi.level", 0, acpi_debug_sysctl, "A", "");
3729#endif /* ACPI_DEBUG */
3730
3731static int
3732acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS)
3733{
3734 int error;
3735 int old;
3736
3737 old = acpi_debug_objects;
3738 error = sysctl_handle_int(oidp, &acpi_debug_objects, 0, req);
3739 if (error != 0 || req->newptr == NULL)
3740 return (error);
3741 if (old == acpi_debug_objects || (old && acpi_debug_objects))
3742 return (0);
3743
3744 ACPI_SERIAL_BEGIN(acpi);
3745 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE;
3746 ACPI_SERIAL_END(acpi);
3747
3748 return (0);
3749}
3750
3751static int
3752acpi_parse_interfaces(char *str, struct acpi_interface *iface)
3753{
3754 char *p;
3755 size_t len;
3756 int i, j;
3757
3758 p = str;
3759 while (isspace(*p) || *p == ',')
3760 p++;
3761 len = strlen(p);
3762 if (len == 0)
3763 return (0);
3764 p = strdup(p, M_TEMP);
3765 for (i = 0; i < len; i++)
3766 if (p[i] == ',')
3767 p[i] = '\0';
3768 i = j = 0;
3769 while (i < len)
3770 if (isspace(p[i]) || p[i] == '\0')
3771 i++;
3772 else {
3773 i += strlen(p + i) + 1;
3774 j++;
3775 }
3776 if (j == 0) {
3777 free(p, M_TEMP);
3778 return (0);
3779 }
3780 iface->data = malloc(sizeof(*iface->data) * j, M_TEMP, M_WAITOK);
3781 iface->num = j;
3782 i = j = 0;
3783 while (i < len)
3784 if (isspace(p[i]) || p[i] == '\0')
3785 i++;
3786 else {
3787 iface->data[j] = p + i;
3788 i += strlen(p + i) + 1;
3789 j++;
3790 }
3791
3792 return (j);
3793}
3794
3795static void
3796acpi_free_interfaces(struct acpi_interface *iface)
3797{
3798
3799 free(iface->data[0], M_TEMP);
3800 free(iface->data, M_TEMP);
3801}
3802
3803static void
3804acpi_reset_interfaces(device_t dev)
3805{
3806 struct acpi_interface list;
3807 ACPI_STATUS status;
3808 int i;
3809
3810 if (acpi_parse_interfaces(acpi_install_interface, &list) > 0) {
3811 for (i = 0; i < list.num; i++) {
3812 status = AcpiInstallInterface(list.data[i]);
3813 if (ACPI_FAILURE(status))
3814 device_printf(dev,
3815 "failed to install _OSI(\"%s\"): %s\n",
3816 list.data[i], AcpiFormatException(status));
3817 else if (bootverbose)
3818 device_printf(dev, "installed _OSI(\"%s\")\n",
3819 list.data[i]);
3820 }
3821 acpi_free_interfaces(&list);
3822 }
3823 if (acpi_parse_interfaces(acpi_remove_interface, &list) > 0) {
3824 for (i = 0; i < list.num; i++) {
3825 status = AcpiRemoveInterface(list.data[i]);
3826 if (ACPI_FAILURE(status))
3827 device_printf(dev,
3828 "failed to remove _OSI(\"%s\"): %s\n",
3829 list.data[i], AcpiFormatException(status));
3830 else if (bootverbose)
3831 device_printf(dev, "removed _OSI(\"%s\")\n",
3832 list.data[i]);
3833 }
3834 acpi_free_interfaces(&list);
3835 }
3836}
3837
3838static int
3839acpi_pm_func(u_long cmd, void *arg, ...)
3840{
3841 int state, acpi_state;
3842 int error;
3843 struct acpi_softc *sc;
3844 va_list ap;
3845
3846 error = 0;
3847 switch (cmd) {
3848 case POWER_CMD_SUSPEND:
3849 sc = (struct acpi_softc *)arg;
3850 if (sc == NULL) {
3851 error = EINVAL;
3852 goto out;
3853 }
3854
3855 va_start(ap, arg);
3856 state = va_arg(ap, int);
3857 va_end(ap);
3858
3859 switch (state) {
3860 case POWER_SLEEP_STATE_STANDBY:
3861 acpi_state = sc->acpi_standby_sx;
3862 break;
3863 case POWER_SLEEP_STATE_SUSPEND:
3864 acpi_state = sc->acpi_suspend_sx;
3865 break;
3866 case POWER_SLEEP_STATE_HIBERNATE:
3867 acpi_state = ACPI_STATE_S4;
3868 break;
3869 default:
3870 error = EINVAL;
3871 goto out;
3872 }
3873
3874 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state)))
3875 error = ENXIO;
3876 break;
3877 default:
3878 error = EINVAL;
3879 goto out;
3880 }
3881
3882out:
3883 return (error);
3884}
3885
3886static void
3887acpi_pm_register(void *arg)
3888{
3889 if (!cold || resource_disabled("acpi", 0))
3890 return;
3891
3892 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL);
3893}
3894
3895SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0);
|