FreeBSD/Linux Kernel Cross Reference
sys/dev/acpica/acpi.c
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: releng/10.1/sys/dev/acpica/acpi.c 269038 2014-07-24 00:02:39Z jhb $");
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
71 static MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices");
72
73 /* Hooks for the ACPI CA debugging infrastructure */
74 #define _COMPONENT ACPI_BUS
75 ACPI_MODULE_NAME("ACPI")
76
77 static d_open_t acpiopen;
78 static d_close_t acpiclose;
79 static d_ioctl_t acpiioctl;
80
81 static 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
89 struct acpi_interface {
90 ACPI_STRING *data;
91 int num;
92 };
93
94 /* Global mutex for locking access to the ACPI subsystem. */
95 struct mtx acpi_mutex;
96
97 /* Bitmap of device quirks. */
98 int acpi_quirks;
99
100 /* Supported sleep states. */
101 static BOOLEAN acpi_sleep_states[ACPI_S_STATE_COUNT];
102
103 static int acpi_modevent(struct module *mod, int event, void *junk);
104 static int acpi_probe(device_t dev);
105 static int acpi_attach(device_t dev);
106 static int acpi_suspend(device_t dev);
107 static int acpi_resume(device_t dev);
108 static int acpi_shutdown(device_t dev);
109 static device_t acpi_add_child(device_t bus, u_int order, const char *name,
110 int unit);
111 static int acpi_print_child(device_t bus, device_t child);
112 static void acpi_probe_nomatch(device_t bus, device_t child);
113 static void acpi_driver_added(device_t dev, driver_t *driver);
114 static int acpi_read_ivar(device_t dev, device_t child, int index,
115 uintptr_t *result);
116 static int acpi_write_ivar(device_t dev, device_t child, int index,
117 uintptr_t value);
118 static struct resource_list *acpi_get_rlist(device_t dev, device_t child);
119 static void acpi_reserve_resources(device_t dev);
120 static int acpi_sysres_alloc(device_t dev);
121 static int acpi_set_resource(device_t dev, device_t child, int type,
122 int rid, u_long start, u_long count);
123 static struct resource *acpi_alloc_resource(device_t bus, device_t child,
124 int type, int *rid, u_long start, u_long end,
125 u_long count, u_int flags);
126 static int acpi_adjust_resource(device_t bus, device_t child, int type,
127 struct resource *r, u_long start, u_long end);
128 static int acpi_release_resource(device_t bus, device_t child, int type,
129 int rid, struct resource *r);
130 static void acpi_delete_resource(device_t bus, device_t child, int type,
131 int rid);
132 static uint32_t acpi_isa_get_logicalid(device_t dev);
133 static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count);
134 static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids);
135 static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev,
136 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters,
137 ACPI_BUFFER *ret);
138 static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level,
139 void *context, void **retval);
140 static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev,
141 int max_depth, acpi_scan_cb_t user_fn, void *arg);
142 static int acpi_set_powerstate(device_t child, int state);
143 static int acpi_isa_pnp_probe(device_t bus, device_t child,
144 struct isa_pnp_id *ids);
145 static void acpi_probe_children(device_t bus);
146 static void acpi_probe_order(ACPI_HANDLE handle, int *order);
147 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level,
148 void *context, void **status);
149 static void acpi_sleep_enable(void *arg);
150 static ACPI_STATUS acpi_sleep_disable(struct acpi_softc *sc);
151 static ACPI_STATUS acpi_EnterSleepState(struct acpi_softc *sc, int state);
152 static void acpi_shutdown_final(void *arg, int howto);
153 static void acpi_enable_fixed_events(struct acpi_softc *sc);
154 static BOOLEAN acpi_has_hid(ACPI_HANDLE handle);
155 static void acpi_resync_clock(struct acpi_softc *sc);
156 static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate);
157 static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate);
158 static int acpi_wake_prep_walk(int sstate);
159 static int acpi_wake_sysctl_walk(device_t dev);
160 static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS);
161 static void acpi_system_eventhandler_sleep(void *arg, int state);
162 static void acpi_system_eventhandler_wakeup(void *arg, int state);
163 static int acpi_sname2sstate(const char *sname);
164 static const char *acpi_sstate2sname(int sstate);
165 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS);
166 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS);
167 static int acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS);
168 static int acpi_pm_func(u_long cmd, void *arg, ...);
169 static int acpi_child_location_str_method(device_t acdev, device_t child,
170 char *buf, size_t buflen);
171 static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child,
172 char *buf, size_t buflen);
173 #if defined(__i386__) || defined(__amd64__)
174 static void acpi_enable_pcie(void);
175 #endif
176 static void acpi_hint_device_unit(device_t acdev, device_t child,
177 const char *name, int *unitp);
178 static void acpi_reset_interfaces(device_t dev);
179
180 static device_method_t acpi_methods[] = {
181 /* Device interface */
182 DEVMETHOD(device_probe, acpi_probe),
183 DEVMETHOD(device_attach, acpi_attach),
184 DEVMETHOD(device_shutdown, acpi_shutdown),
185 DEVMETHOD(device_detach, bus_generic_detach),
186 DEVMETHOD(device_suspend, acpi_suspend),
187 DEVMETHOD(device_resume, acpi_resume),
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 DEVMETHOD_END
221 };
222
223 static driver_t acpi_driver = {
224 "acpi",
225 acpi_methods,
226 sizeof(struct acpi_softc),
227 };
228
229 static devclass_t acpi_devclass;
230 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0);
231 MODULE_VERSION(acpi, 1);
232
233 ACPI_SERIAL_DECL(acpi, "ACPI root bus");
234
235 /* Local pools for managing system resources for ACPI child devices. */
236 static struct rman acpi_rman_io, acpi_rman_mem;
237
238 #define ACPI_MINIMUM_AWAKETIME 5
239
240 /* Holds the description of the acpi0 device. */
241 static char acpi_desc[ACPI_OEM_ID_SIZE + ACPI_OEM_TABLE_ID_SIZE + 2];
242
243 SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging");
244 static char acpi_ca_version[12];
245 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD,
246 acpi_ca_version, 0, "Version of Intel ACPI-CA");
247
248 /*
249 * Allow overriding _OSI methods.
250 */
251 static char acpi_install_interface[256];
252 TUNABLE_STR("hw.acpi.install_interface", acpi_install_interface,
253 sizeof(acpi_install_interface));
254 static char acpi_remove_interface[256];
255 TUNABLE_STR("hw.acpi.remove_interface", acpi_remove_interface,
256 sizeof(acpi_remove_interface));
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 */
265 static int acpi_serialize_methods;
266 TUNABLE_INT("hw.acpi.serialize_methods", &acpi_serialize_methods);
267
268 /* Allow users to dump Debug objects without ACPI debugger. */
269 static int acpi_debug_objects;
270 TUNABLE_INT("debug.acpi.enable_debug_objects", &acpi_debug_objects);
271 SYSCTL_PROC(_debug_acpi, OID_AUTO, enable_debug_objects,
272 CTLFLAG_RW | CTLTYPE_INT, NULL, 0, acpi_debug_objects_sysctl, "I",
273 "Enable Debug objects");
274
275 /* Allow the interpreter to ignore common mistakes in BIOS. */
276 static int acpi_interpreter_slack = 1;
277 TUNABLE_INT("debug.acpi.interpreter_slack", &acpi_interpreter_slack);
278 SYSCTL_INT(_debug_acpi, OID_AUTO, interpreter_slack, CTLFLAG_RDTUN,
279 &acpi_interpreter_slack, 1, "Turn on interpreter slack mode.");
280
281 #ifdef __amd64__
282 /* Reset system clock while resuming. XXX Remove once tested. */
283 static int acpi_reset_clock = 1;
284 TUNABLE_INT("debug.acpi.reset_clock", &acpi_reset_clock);
285 SYSCTL_INT(_debug_acpi, OID_AUTO, reset_clock, CTLFLAG_RW,
286 &acpi_reset_clock, 1, "Reset system clock while resuming.");
287 #endif
288
289 /* Allow users to override quirks. */
290 TUNABLE_INT("debug.acpi.quirks", &acpi_quirks);
291
292 static int acpi_susp_bounce;
293 SYSCTL_INT(_debug_acpi, OID_AUTO, suspend_bounce, CTLFLAG_RW,
294 &acpi_susp_bounce, 0, "Don't actually suspend, just test devices.");
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 */
302 static int
303 acpi_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 */
325 ACPI_STATUS
326 acpi_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 */
367 int
368 acpi_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 */
426 static int
427 acpi_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 (BUS_PROBE_NOWILDCARD);
435 }
436
437 static int
438 acpi_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)
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(AcpiEvaluateObject(ACPI_ROOT_OBJECT,
617 __DECONST(char *, AcpiGbl_SleepStateNames[state]), NULL, NULL)) &&
618 ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB)))
619 acpi_sleep_states[state] = TRUE;
620
621 /*
622 * Dispatch the default sleep state to devices. The lid switch is set
623 * to UNKNOWN by default to avoid surprising users.
624 */
625 sc->acpi_power_button_sx = acpi_sleep_states[ACPI_STATE_S5] ?
626 ACPI_STATE_S5 : ACPI_STATE_UNKNOWN;
627 sc->acpi_lid_switch_sx = ACPI_STATE_UNKNOWN;
628 sc->acpi_standby_sx = acpi_sleep_states[ACPI_STATE_S1] ?
629 ACPI_STATE_S1 : ACPI_STATE_UNKNOWN;
630 sc->acpi_suspend_sx = acpi_sleep_states[ACPI_STATE_S3] ?
631 ACPI_STATE_S3 : ACPI_STATE_UNKNOWN;
632
633 /* Pick the first valid sleep state for the sleep button default. */
634 sc->acpi_sleep_button_sx = ACPI_STATE_UNKNOWN;
635 for (state = ACPI_STATE_S1; state <= ACPI_STATE_S4; state++)
636 if (acpi_sleep_states[state]) {
637 sc->acpi_sleep_button_sx = state;
638 break;
639 }
640
641 acpi_enable_fixed_events(sc);
642
643 /*
644 * Scan the namespace and attach/initialise children.
645 */
646
647 /* Register our shutdown handler. */
648 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc,
649 SHUTDOWN_PRI_LAST);
650
651 /*
652 * Register our acpi event handlers.
653 * XXX should be configurable eg. via userland policy manager.
654 */
655 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep,
656 sc, ACPI_EVENT_PRI_LAST);
657 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup,
658 sc, ACPI_EVENT_PRI_LAST);
659
660 /* Flag our initial states. */
661 sc->acpi_enabled = TRUE;
662 sc->acpi_sstate = ACPI_STATE_S0;
663 sc->acpi_sleep_disabled = TRUE;
664
665 /* Create the control device */
666 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644,
667 "acpi");
668 sc->acpi_dev_t->si_drv1 = sc;
669
670 if ((error = acpi_machdep_init(dev)))
671 goto out;
672
673 /* Register ACPI again to pass the correct argument of pm_func. */
674 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc);
675
676 if (!acpi_disabled("bus"))
677 acpi_probe_children(dev);
678
679 /* Update all GPEs and enable runtime GPEs. */
680 status = AcpiUpdateAllGpes();
681 if (ACPI_FAILURE(status))
682 device_printf(dev, "Could not update all GPEs: %s\n",
683 AcpiFormatException(status));
684
685 /* Allow sleep request after a while. */
686 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME);
687
688 error = 0;
689
690 out:
691 return_VALUE (error);
692 }
693
694 static void
695 acpi_set_power_children(device_t dev, int state)
696 {
697 device_t child, parent;
698 device_t *devlist;
699 struct pci_devinfo *dinfo;
700 int dstate, i, numdevs;
701
702 if (device_get_children(dev, &devlist, &numdevs) != 0)
703 return;
704
705 /*
706 * Retrieve and set D-state for the sleep state if _SxD is present.
707 * Skip children who aren't attached since they are handled separately.
708 */
709 parent = device_get_parent(dev);
710 for (i = 0; i < numdevs; i++) {
711 child = devlist[i];
712 dinfo = device_get_ivars(child);
713 dstate = state;
714 if (device_is_attached(child) &&
715 acpi_device_pwr_for_sleep(parent, dev, &dstate) == 0)
716 acpi_set_powerstate(child, dstate);
717 }
718 free(devlist, M_TEMP);
719 }
720
721 static int
722 acpi_suspend(device_t dev)
723 {
724 int error;
725
726 GIANT_REQUIRED;
727
728 error = bus_generic_suspend(dev);
729 if (error == 0)
730 acpi_set_power_children(dev, ACPI_STATE_D3);
731
732 return (error);
733 }
734
735 static int
736 acpi_resume(device_t dev)
737 {
738
739 GIANT_REQUIRED;
740
741 acpi_set_power_children(dev, ACPI_STATE_D0);
742
743 return (bus_generic_resume(dev));
744 }
745
746 static int
747 acpi_shutdown(device_t dev)
748 {
749
750 GIANT_REQUIRED;
751
752 /* Allow children to shutdown first. */
753 bus_generic_shutdown(dev);
754
755 /*
756 * Enable any GPEs that are able to power-on the system (i.e., RTC).
757 * Also, disable any that are not valid for this state (most).
758 */
759 acpi_wake_prep_walk(ACPI_STATE_S5);
760
761 return (0);
762 }
763
764 /*
765 * Handle a new device being added
766 */
767 static device_t
768 acpi_add_child(device_t bus, u_int order, const char *name, int unit)
769 {
770 struct acpi_device *ad;
771 device_t child;
772
773 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL)
774 return (NULL);
775
776 resource_list_init(&ad->ad_rl);
777
778 child = device_add_child_ordered(bus, order, name, unit);
779 if (child != NULL)
780 device_set_ivars(child, ad);
781 else
782 free(ad, M_ACPIDEV);
783 return (child);
784 }
785
786 static int
787 acpi_print_child(device_t bus, device_t child)
788 {
789 struct acpi_device *adev = device_get_ivars(child);
790 struct resource_list *rl = &adev->ad_rl;
791 int retval = 0;
792
793 retval += bus_print_child_header(bus, child);
794 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx");
795 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx");
796 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
797 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld");
798 if (device_get_flags(child))
799 retval += printf(" flags %#x", device_get_flags(child));
800 retval += bus_print_child_footer(bus, child);
801
802 return (retval);
803 }
804
805 /*
806 * If this device is an ACPI child but no one claimed it, attempt
807 * to power it off. We'll power it back up when a driver is added.
808 *
809 * XXX Disabled for now since many necessary devices (like fdc and
810 * ATA) don't claim the devices we created for them but still expect
811 * them to be powered up.
812 */
813 static void
814 acpi_probe_nomatch(device_t bus, device_t child)
815 {
816 #ifdef ACPI_ENABLE_POWERDOWN_NODRIVER
817 acpi_set_powerstate(child, ACPI_STATE_D3);
818 #endif
819 }
820
821 /*
822 * If a new driver has a chance to probe a child, first power it up.
823 *
824 * XXX Disabled for now (see acpi_probe_nomatch for details).
825 */
826 static void
827 acpi_driver_added(device_t dev, driver_t *driver)
828 {
829 device_t child, *devlist;
830 int i, numdevs;
831
832 DEVICE_IDENTIFY(driver, dev);
833 if (device_get_children(dev, &devlist, &numdevs))
834 return;
835 for (i = 0; i < numdevs; i++) {
836 child = devlist[i];
837 if (device_get_state(child) == DS_NOTPRESENT) {
838 #ifdef ACPI_ENABLE_POWERDOWN_NODRIVER
839 acpi_set_powerstate(child, ACPI_STATE_D0);
840 if (device_probe_and_attach(child) != 0)
841 acpi_set_powerstate(child, ACPI_STATE_D3);
842 #else
843 device_probe_and_attach(child);
844 #endif
845 }
846 }
847 free(devlist, M_TEMP);
848 }
849
850 /* Location hint for devctl(8) */
851 static int
852 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf,
853 size_t buflen)
854 {
855 struct acpi_device *dinfo = device_get_ivars(child);
856
857 if (dinfo->ad_handle)
858 snprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle));
859 else
860 snprintf(buf, buflen, "unknown");
861 return (0);
862 }
863
864 /* PnP information for devctl(8) */
865 static int
866 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf,
867 size_t buflen)
868 {
869 struct acpi_device *dinfo = device_get_ivars(child);
870 ACPI_DEVICE_INFO *adinfo;
871
872 if (ACPI_FAILURE(AcpiGetObjectInfo(dinfo->ad_handle, &adinfo))) {
873 snprintf(buf, buflen, "unknown");
874 return (0);
875 }
876
877 snprintf(buf, buflen, "_HID=%s _UID=%lu",
878 (adinfo->Valid & ACPI_VALID_HID) ?
879 adinfo->HardwareId.String : "none",
880 (adinfo->Valid & ACPI_VALID_UID) ?
881 strtoul(adinfo->UniqueId.String, NULL, 10) : 0UL);
882 AcpiOsFree(adinfo);
883
884 return (0);
885 }
886
887 /*
888 * Handle per-device ivars
889 */
890 static int
891 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
892 {
893 struct acpi_device *ad;
894
895 if ((ad = device_get_ivars(child)) == NULL) {
896 device_printf(child, "device has no ivars\n");
897 return (ENOENT);
898 }
899
900 /* ACPI and ISA compatibility ivars */
901 switch(index) {
902 case ACPI_IVAR_HANDLE:
903 *(ACPI_HANDLE *)result = ad->ad_handle;
904 break;
905 case ACPI_IVAR_PRIVATE:
906 *(void **)result = ad->ad_private;
907 break;
908 case ACPI_IVAR_FLAGS:
909 *(int *)result = ad->ad_flags;
910 break;
911 case ISA_IVAR_VENDORID:
912 case ISA_IVAR_SERIAL:
913 case ISA_IVAR_COMPATID:
914 *(int *)result = -1;
915 break;
916 case ISA_IVAR_LOGICALID:
917 *(int *)result = acpi_isa_get_logicalid(child);
918 break;
919 default:
920 return (ENOENT);
921 }
922
923 return (0);
924 }
925
926 static int
927 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value)
928 {
929 struct acpi_device *ad;
930
931 if ((ad = device_get_ivars(child)) == NULL) {
932 device_printf(child, "device has no ivars\n");
933 return (ENOENT);
934 }
935
936 switch(index) {
937 case ACPI_IVAR_HANDLE:
938 ad->ad_handle = (ACPI_HANDLE)value;
939 break;
940 case ACPI_IVAR_PRIVATE:
941 ad->ad_private = (void *)value;
942 break;
943 case ACPI_IVAR_FLAGS:
944 ad->ad_flags = (int)value;
945 break;
946 default:
947 panic("bad ivar write request (%d)", index);
948 return (ENOENT);
949 }
950
951 return (0);
952 }
953
954 /*
955 * Handle child resource allocation/removal
956 */
957 static struct resource_list *
958 acpi_get_rlist(device_t dev, device_t child)
959 {
960 struct acpi_device *ad;
961
962 ad = device_get_ivars(child);
963 return (&ad->ad_rl);
964 }
965
966 static int
967 acpi_match_resource_hint(device_t dev, int type, long value)
968 {
969 struct acpi_device *ad = device_get_ivars(dev);
970 struct resource_list *rl = &ad->ad_rl;
971 struct resource_list_entry *rle;
972
973 STAILQ_FOREACH(rle, rl, link) {
974 if (rle->type != type)
975 continue;
976 if (rle->start <= value && rle->end >= value)
977 return (1);
978 }
979 return (0);
980 }
981
982 /*
983 * Wire device unit numbers based on resource matches in hints.
984 */
985 static void
986 acpi_hint_device_unit(device_t acdev, device_t child, const char *name,
987 int *unitp)
988 {
989 const char *s;
990 long value;
991 int line, matches, unit;
992
993 /*
994 * Iterate over all the hints for the devices with the specified
995 * name to see if one's resources are a subset of this device.
996 */
997 line = 0;
998 for (;;) {
999 if (resource_find_dev(&line, name, &unit, "at", NULL) != 0)
1000 break;
1001
1002 /* Must have an "at" for acpi or isa. */
1003 resource_string_value(name, unit, "at", &s);
1004 if (!(strcmp(s, "acpi0") == 0 || strcmp(s, "acpi") == 0 ||
1005 strcmp(s, "isa0") == 0 || strcmp(s, "isa") == 0))
1006 continue;
1007
1008 /*
1009 * Check for matching resources. We must have at least one match.
1010 * Since I/O and memory resources cannot be shared, if we get a
1011 * match on either of those, ignore any mismatches in IRQs or DRQs.
1012 *
1013 * XXX: We may want to revisit this to be more lenient and wire
1014 * as long as it gets one match.
1015 */
1016 matches = 0;
1017 if (resource_long_value(name, unit, "port", &value) == 0) {
1018 /*
1019 * Floppy drive controllers are notorious for having a
1020 * wide variety of resources not all of which include the
1021 * first port that is specified by the hint (typically
1022 * 0x3f0) (see the comment above fdc_isa_alloc_resources()
1023 * in fdc_isa.c). However, they do all seem to include
1024 * port + 2 (e.g. 0x3f2) so for a floppy device, look for
1025 * 'value + 2' in the port resources instead of the hint
1026 * value.
1027 */
1028 if (strcmp(name, "fdc") == 0)
1029 value += 2;
1030 if (acpi_match_resource_hint(child, SYS_RES_IOPORT, value))
1031 matches++;
1032 else
1033 continue;
1034 }
1035 if (resource_long_value(name, unit, "maddr", &value) == 0) {
1036 if (acpi_match_resource_hint(child, SYS_RES_MEMORY, value))
1037 matches++;
1038 else
1039 continue;
1040 }
1041 if (matches > 0)
1042 goto matched;
1043 if (resource_long_value(name, unit, "irq", &value) == 0) {
1044 if (acpi_match_resource_hint(child, SYS_RES_IRQ, value))
1045 matches++;
1046 else
1047 continue;
1048 }
1049 if (resource_long_value(name, unit, "drq", &value) == 0) {
1050 if (acpi_match_resource_hint(child, SYS_RES_DRQ, value))
1051 matches++;
1052 else
1053 continue;
1054 }
1055
1056 matched:
1057 if (matches > 0) {
1058 /* We have a winner! */
1059 *unitp = unit;
1060 break;
1061 }
1062 }
1063 }
1064
1065 /*
1066 * Pre-allocate/manage all memory and IO resources. Since rman can't handle
1067 * duplicates, we merge any in the sysresource attach routine.
1068 */
1069 static int
1070 acpi_sysres_alloc(device_t dev)
1071 {
1072 struct resource *res;
1073 struct resource_list *rl;
1074 struct resource_list_entry *rle;
1075 struct rman *rm;
1076 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL };
1077 device_t *children;
1078 int child_count, i;
1079
1080 /*
1081 * Probe/attach any sysresource devices. This would be unnecessary if we
1082 * had multi-pass probe/attach.
1083 */
1084 if (device_get_children(dev, &children, &child_count) != 0)
1085 return (ENXIO);
1086 for (i = 0; i < child_count; i++) {
1087 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL)
1088 device_probe_and_attach(children[i]);
1089 }
1090 free(children, M_TEMP);
1091
1092 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev);
1093 STAILQ_FOREACH(rle, rl, link) {
1094 if (rle->res != NULL) {
1095 device_printf(dev, "duplicate resource for %lx\n", rle->start);
1096 continue;
1097 }
1098
1099 /* Only memory and IO resources are valid here. */
1100 switch (rle->type) {
1101 case SYS_RES_IOPORT:
1102 rm = &acpi_rman_io;
1103 break;
1104 case SYS_RES_MEMORY:
1105 rm = &acpi_rman_mem;
1106 break;
1107 default:
1108 continue;
1109 }
1110
1111 /* Pre-allocate resource and add to our rman pool. */
1112 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type,
1113 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 0);
1114 if (res != NULL) {
1115 rman_manage_region(rm, rman_get_start(res), rman_get_end(res));
1116 rle->res = res;
1117 } else
1118 device_printf(dev, "reservation of %lx, %lx (%d) failed\n",
1119 rle->start, rle->count, rle->type);
1120 }
1121 return (0);
1122 }
1123
1124 static char *pcilink_ids[] = { "PNP0C0F", NULL };
1125 static char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL };
1126
1127 /*
1128 * Reserve declared resources for devices found during attach once system
1129 * resources have been allocated.
1130 */
1131 static void
1132 acpi_reserve_resources(device_t dev)
1133 {
1134 struct resource_list_entry *rle;
1135 struct resource_list *rl;
1136 struct acpi_device *ad;
1137 struct acpi_softc *sc;
1138 device_t *children;
1139 int child_count, i;
1140
1141 sc = device_get_softc(dev);
1142 if (device_get_children(dev, &children, &child_count) != 0)
1143 return;
1144 for (i = 0; i < child_count; i++) {
1145 ad = device_get_ivars(children[i]);
1146 rl = &ad->ad_rl;
1147
1148 /* Don't reserve system resources. */
1149 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL)
1150 continue;
1151
1152 STAILQ_FOREACH(rle, rl, link) {
1153 /*
1154 * Don't reserve IRQ resources. There are many sticky things
1155 * to get right otherwise (e.g. IRQs for psm, atkbd, and HPET
1156 * when using legacy routing).
1157 */
1158 if (rle->type == SYS_RES_IRQ)
1159 continue;
1160
1161 /*
1162 * Don't reserve the resource if it is already allocated.
1163 * The acpi_ec(4) driver can allocate its resources early
1164 * if ECDT is present.
1165 */
1166 if (rle->res != NULL)
1167 continue;
1168
1169 /*
1170 * Try to reserve the resource from our parent. If this
1171 * fails because the resource is a system resource, just
1172 * let it be. The resource range is already reserved so
1173 * that other devices will not use it. If the driver
1174 * needs to allocate the resource, then
1175 * acpi_alloc_resource() will sub-alloc from the system
1176 * resource.
1177 */
1178 resource_list_reserve(rl, dev, children[i], rle->type, &rle->rid,
1179 rle->start, rle->end, rle->count, 0);
1180 }
1181 }
1182 free(children, M_TEMP);
1183 sc->acpi_resources_reserved = 1;
1184 }
1185
1186 static int
1187 acpi_set_resource(device_t dev, device_t child, int type, int rid,
1188 u_long start, u_long count)
1189 {
1190 struct acpi_softc *sc = device_get_softc(dev);
1191 struct acpi_device *ad = device_get_ivars(child);
1192 struct resource_list *rl = &ad->ad_rl;
1193 ACPI_DEVICE_INFO *devinfo;
1194 u_long end;
1195
1196 /* Ignore IRQ resources for PCI link devices. */
1197 if (type == SYS_RES_IRQ && ACPI_ID_PROBE(dev, child, pcilink_ids) != NULL)
1198 return (0);
1199
1200 /*
1201 * Ignore most resources for PCI root bridges. Some BIOSes
1202 * incorrectly enumerate the memory ranges they decode as plain
1203 * memory resources instead of as ResourceProducer ranges. Other
1204 * BIOSes incorrectly list system resource entries for I/O ranges
1205 * under the PCI bridge. Do allow the one known-correct case on
1206 * x86 of a PCI bridge claiming the I/O ports used for PCI config
1207 * access.
1208 */
1209 if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) {
1210 if (ACPI_SUCCESS(AcpiGetObjectInfo(ad->ad_handle, &devinfo))) {
1211 if ((devinfo->Flags & ACPI_PCI_ROOT_BRIDGE) != 0) {
1212 #if defined(__i386__) || defined(__amd64__)
1213 if (!(type == SYS_RES_IOPORT && start == CONF1_ADDR_PORT))
1214 #endif
1215 {
1216 AcpiOsFree(devinfo);
1217 return (0);
1218 }
1219 }
1220 AcpiOsFree(devinfo);
1221 }
1222 }
1223
1224 /* If the resource is already allocated, fail. */
1225 if (resource_list_busy(rl, type, rid))
1226 return (EBUSY);
1227
1228 /* If the resource is already reserved, release it. */
1229 if (resource_list_reserved(rl, type, rid))
1230 resource_list_unreserve(rl, dev, child, type, rid);
1231
1232 /* Add the resource. */
1233 end = (start + count - 1);
1234 resource_list_add(rl, type, rid, start, end, count);
1235
1236 /* Don't reserve resources until the system resources are allocated. */
1237 if (!sc->acpi_resources_reserved)
1238 return (0);
1239
1240 /* Don't reserve system resources. */
1241 if (ACPI_ID_PROBE(dev, child, sysres_ids) != NULL)
1242 return (0);
1243
1244 /*
1245 * Don't reserve IRQ resources. There are many sticky things to
1246 * get right otherwise (e.g. IRQs for psm, atkbd, and HPET when
1247 * using legacy routing).
1248 */
1249 if (type == SYS_RES_IRQ)
1250 return (0);
1251
1252 /*
1253 * Reserve the resource.
1254 *
1255 * XXX: Ignores failure for now. Failure here is probably a
1256 * BIOS/firmware bug?
1257 */
1258 resource_list_reserve(rl, dev, child, type, &rid, start, end, count, 0);
1259 return (0);
1260 }
1261
1262 static struct resource *
1263 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid,
1264 u_long start, u_long end, u_long count, u_int flags)
1265 {
1266 ACPI_RESOURCE ares;
1267 struct acpi_device *ad;
1268 struct resource_list_entry *rle;
1269 struct resource_list *rl;
1270 struct resource *res;
1271 int isdefault = (start == 0UL && end == ~0UL);
1272
1273 /*
1274 * First attempt at allocating the resource. For direct children,
1275 * use resource_list_alloc() to handle reserved resources. For
1276 * other devices, pass the request up to our parent.
1277 */
1278 if (bus == device_get_parent(child)) {
1279 ad = device_get_ivars(child);
1280 rl = &ad->ad_rl;
1281
1282 /*
1283 * Simulate the behavior of the ISA bus for direct children
1284 * devices. That is, if a non-default range is specified for
1285 * a resource that doesn't exist, use bus_set_resource() to
1286 * add the resource before allocating it. Note that these
1287 * resources will not be reserved.
1288 */
1289 if (!isdefault && resource_list_find(rl, type, *rid) == NULL)
1290 resource_list_add(rl, type, *rid, start, end, count);
1291 res = resource_list_alloc(rl, bus, child, type, rid, start, end, count,
1292 flags);
1293 if (res != NULL && type == SYS_RES_IRQ) {
1294 /*
1295 * Since bus_config_intr() takes immediate effect, we cannot
1296 * configure the interrupt associated with a device when we
1297 * parse the resources but have to defer it until a driver
1298 * actually allocates the interrupt via bus_alloc_resource().
1299 *
1300 * XXX: Should we handle the lookup failing?
1301 */
1302 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares)))
1303 acpi_config_intr(child, &ares);
1304 }
1305
1306 /*
1307 * If this is an allocation of the "default" range for a given
1308 * RID, fetch the exact bounds for this resource from the
1309 * resource list entry to try to allocate the range from the
1310 * system resource regions.
1311 */
1312 if (res == NULL && isdefault) {
1313 rle = resource_list_find(rl, type, *rid);
1314 if (rle != NULL) {
1315 start = rle->start;
1316 end = rle->end;
1317 count = rle->count;
1318 }
1319 }
1320 } else
1321 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid,
1322 start, end, count, flags);
1323
1324 /*
1325 * If the first attempt failed and this is an allocation of a
1326 * specific range, try to satisfy the request via a suballocation
1327 * from our system resource regions.
1328 */
1329 if (res == NULL && start + count - 1 == end)
1330 res = acpi_alloc_sysres(child, type, rid, start, end, count, flags);
1331 return (res);
1332 }
1333
1334 /*
1335 * Attempt to allocate a specific resource range from the system
1336 * resource ranges. Note that we only handle memory and I/O port
1337 * system resources.
1338 */
1339 struct resource *
1340 acpi_alloc_sysres(device_t child, int type, int *rid, u_long start, u_long end,
1341 u_long count, u_int flags)
1342 {
1343 struct rman *rm;
1344 struct resource *res;
1345
1346 switch (type) {
1347 case SYS_RES_IOPORT:
1348 rm = &acpi_rman_io;
1349 break;
1350 case SYS_RES_MEMORY:
1351 rm = &acpi_rman_mem;
1352 break;
1353 default:
1354 return (NULL);
1355 }
1356
1357 KASSERT(start + count - 1 == end, ("wildcard resource range"));
1358 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE,
1359 child);
1360 if (res == NULL)
1361 return (NULL);
1362
1363 rman_set_rid(res, *rid);
1364
1365 /* If requested, activate the resource using the parent's method. */
1366 if (flags & RF_ACTIVE)
1367 if (bus_activate_resource(child, type, *rid, res) != 0) {
1368 rman_release_resource(res);
1369 return (NULL);
1370 }
1371
1372 return (res);
1373 }
1374
1375 static int
1376 acpi_is_resource_managed(int type, struct resource *r)
1377 {
1378
1379 /* We only handle memory and IO resources through rman. */
1380 switch (type) {
1381 case SYS_RES_IOPORT:
1382 return (rman_is_region_manager(r, &acpi_rman_io));
1383 case SYS_RES_MEMORY:
1384 return (rman_is_region_manager(r, &acpi_rman_mem));
1385 }
1386 return (0);
1387 }
1388
1389 static int
1390 acpi_adjust_resource(device_t bus, device_t child, int type, struct resource *r,
1391 u_long start, u_long end)
1392 {
1393
1394 if (acpi_is_resource_managed(type, r))
1395 return (rman_adjust_resource(r, start, end));
1396 return (bus_generic_adjust_resource(bus, child, type, r, start, end));
1397 }
1398
1399 static int
1400 acpi_release_resource(device_t bus, device_t child, int type, int rid,
1401 struct resource *r)
1402 {
1403 int ret;
1404
1405 /*
1406 * If this resource belongs to one of our internal managers,
1407 * deactivate it and release it to the local pool.
1408 */
1409 if (acpi_is_resource_managed(type, r)) {
1410 if (rman_get_flags(r) & RF_ACTIVE) {
1411 ret = bus_deactivate_resource(child, type, rid, r);
1412 if (ret != 0)
1413 return (ret);
1414 }
1415 return (rman_release_resource(r));
1416 }
1417
1418 return (bus_generic_rl_release_resource(bus, child, type, rid, r));
1419 }
1420
1421 static void
1422 acpi_delete_resource(device_t bus, device_t child, int type, int rid)
1423 {
1424 struct resource_list *rl;
1425
1426 rl = acpi_get_rlist(bus, child);
1427 if (resource_list_busy(rl, type, rid)) {
1428 device_printf(bus, "delete_resource: Resource still owned by child"
1429 " (type=%d, rid=%d)\n", type, rid);
1430 return;
1431 }
1432 resource_list_unreserve(rl, bus, child, type, rid);
1433 resource_list_delete(rl, type, rid);
1434 }
1435
1436 /* Allocate an IO port or memory resource, given its GAS. */
1437 int
1438 acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas,
1439 struct resource **res, u_int flags)
1440 {
1441 int error, res_type;
1442
1443 error = ENOMEM;
1444 if (type == NULL || rid == NULL || gas == NULL || res == NULL)
1445 return (EINVAL);
1446
1447 /* We only support memory and IO spaces. */
1448 switch (gas->SpaceId) {
1449 case ACPI_ADR_SPACE_SYSTEM_MEMORY:
1450 res_type = SYS_RES_MEMORY;
1451 break;
1452 case ACPI_ADR_SPACE_SYSTEM_IO:
1453 res_type = SYS_RES_IOPORT;
1454 break;
1455 default:
1456 return (EOPNOTSUPP);
1457 }
1458
1459 /*
1460 * If the register width is less than 8, assume the BIOS author means
1461 * it is a bit field and just allocate a byte.
1462 */
1463 if (gas->BitWidth && gas->BitWidth < 8)
1464 gas->BitWidth = 8;
1465
1466 /* Validate the address after we're sure we support the space. */
1467 if (gas->Address == 0 || gas->BitWidth == 0)
1468 return (EINVAL);
1469
1470 bus_set_resource(dev, res_type, *rid, gas->Address,
1471 gas->BitWidth / 8);
1472 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags);
1473 if (*res != NULL) {
1474 *type = res_type;
1475 error = 0;
1476 } else
1477 bus_delete_resource(dev, res_type, *rid);
1478
1479 return (error);
1480 }
1481
1482 /* Probe _HID and _CID for compatible ISA PNP ids. */
1483 static uint32_t
1484 acpi_isa_get_logicalid(device_t dev)
1485 {
1486 ACPI_DEVICE_INFO *devinfo;
1487 ACPI_HANDLE h;
1488 uint32_t pnpid;
1489
1490 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1491
1492 /* Fetch and validate the HID. */
1493 if ((h = acpi_get_handle(dev)) == NULL ||
1494 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
1495 return_VALUE (0);
1496
1497 pnpid = (devinfo->Valid & ACPI_VALID_HID) != 0 &&
1498 devinfo->HardwareId.Length >= ACPI_EISAID_STRING_SIZE ?
1499 PNP_EISAID(devinfo->HardwareId.String) : 0;
1500 AcpiOsFree(devinfo);
1501
1502 return_VALUE (pnpid);
1503 }
1504
1505 static int
1506 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count)
1507 {
1508 ACPI_DEVICE_INFO *devinfo;
1509 ACPI_PNP_DEVICE_ID *ids;
1510 ACPI_HANDLE h;
1511 uint32_t *pnpid;
1512 int i, valid;
1513
1514 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1515
1516 pnpid = cids;
1517
1518 /* Fetch and validate the CID */
1519 if ((h = acpi_get_handle(dev)) == NULL ||
1520 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
1521 return_VALUE (0);
1522
1523 if ((devinfo->Valid & ACPI_VALID_CID) == 0) {
1524 AcpiOsFree(devinfo);
1525 return_VALUE (0);
1526 }
1527
1528 if (devinfo->CompatibleIdList.Count < count)
1529 count = devinfo->CompatibleIdList.Count;
1530 ids = devinfo->CompatibleIdList.Ids;
1531 for (i = 0, valid = 0; i < count; i++)
1532 if (ids[i].Length >= ACPI_EISAID_STRING_SIZE &&
1533 strncmp(ids[i].String, "PNP", 3) == 0) {
1534 *pnpid++ = PNP_EISAID(ids[i].String);
1535 valid++;
1536 }
1537 AcpiOsFree(devinfo);
1538
1539 return_VALUE (valid);
1540 }
1541
1542 static char *
1543 acpi_device_id_probe(device_t bus, device_t dev, char **ids)
1544 {
1545 ACPI_HANDLE h;
1546 ACPI_OBJECT_TYPE t;
1547 int i;
1548
1549 h = acpi_get_handle(dev);
1550 if (ids == NULL || h == NULL)
1551 return (NULL);
1552 t = acpi_get_type(dev);
1553 if (t != ACPI_TYPE_DEVICE && t != ACPI_TYPE_PROCESSOR)
1554 return (NULL);
1555
1556 /* Try to match one of the array of IDs with a HID or CID. */
1557 for (i = 0; ids[i] != NULL; i++) {
1558 if (acpi_MatchHid(h, ids[i]))
1559 return (ids[i]);
1560 }
1561 return (NULL);
1562 }
1563
1564 static ACPI_STATUS
1565 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname,
1566 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret)
1567 {
1568 ACPI_HANDLE h;
1569
1570 if (dev == NULL)
1571 h = ACPI_ROOT_OBJECT;
1572 else if ((h = acpi_get_handle(dev)) == NULL)
1573 return (AE_BAD_PARAMETER);
1574 return (AcpiEvaluateObject(h, pathname, parameters, ret));
1575 }
1576
1577 int
1578 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate)
1579 {
1580 struct acpi_softc *sc;
1581 ACPI_HANDLE handle;
1582 ACPI_STATUS status;
1583 char sxd[8];
1584
1585 handle = acpi_get_handle(dev);
1586
1587 /*
1588 * XXX If we find these devices, don't try to power them down.
1589 * The serial and IRDA ports on my T23 hang the system when
1590 * set to D3 and it appears that such legacy devices may
1591 * need special handling in their drivers.
1592 */
1593 if (dstate == NULL || handle == NULL ||
1594 acpi_MatchHid(handle, "PNP0500") ||
1595 acpi_MatchHid(handle, "PNP0501") ||
1596 acpi_MatchHid(handle, "PNP0502") ||
1597 acpi_MatchHid(handle, "PNP0510") ||
1598 acpi_MatchHid(handle, "PNP0511"))
1599 return (ENXIO);
1600
1601 /*
1602 * Override next state with the value from _SxD, if present.
1603 * Note illegal _S0D is evaluated because some systems expect this.
1604 */
1605 sc = device_get_softc(bus);
1606 snprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate);
1607 status = acpi_GetInteger(handle, sxd, dstate);
1608 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
1609 device_printf(dev, "failed to get %s on %s: %s\n", sxd,
1610 acpi_name(handle), AcpiFormatException(status));
1611 return (ENXIO);
1612 }
1613
1614 return (0);
1615 }
1616
1617 /* Callback arg for our implementation of walking the namespace. */
1618 struct acpi_device_scan_ctx {
1619 acpi_scan_cb_t user_fn;
1620 void *arg;
1621 ACPI_HANDLE parent;
1622 };
1623
1624 static ACPI_STATUS
1625 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval)
1626 {
1627 struct acpi_device_scan_ctx *ctx;
1628 device_t dev, old_dev;
1629 ACPI_STATUS status;
1630 ACPI_OBJECT_TYPE type;
1631
1632 /*
1633 * Skip this device if we think we'll have trouble with it or it is
1634 * the parent where the scan began.
1635 */
1636 ctx = (struct acpi_device_scan_ctx *)arg;
1637 if (acpi_avoid(h) || h == ctx->parent)
1638 return (AE_OK);
1639
1640 /* If this is not a valid device type (e.g., a method), skip it. */
1641 if (ACPI_FAILURE(AcpiGetType(h, &type)))
1642 return (AE_OK);
1643 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR &&
1644 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER)
1645 return (AE_OK);
1646
1647 /*
1648 * Call the user function with the current device. If it is unchanged
1649 * afterwards, return. Otherwise, we update the handle to the new dev.
1650 */
1651 old_dev = acpi_get_device(h);
1652 dev = old_dev;
1653 status = ctx->user_fn(h, &dev, level, ctx->arg);
1654 if (ACPI_FAILURE(status) || old_dev == dev)
1655 return (status);
1656
1657 /* Remove the old child and its connection to the handle. */
1658 if (old_dev != NULL) {
1659 device_delete_child(device_get_parent(old_dev), old_dev);
1660 AcpiDetachData(h, acpi_fake_objhandler);
1661 }
1662
1663 /* Recreate the handle association if the user created a device. */
1664 if (dev != NULL)
1665 AcpiAttachData(h, acpi_fake_objhandler, dev);
1666
1667 return (AE_OK);
1668 }
1669
1670 static ACPI_STATUS
1671 acpi_device_scan_children(device_t bus, device_t dev, int max_depth,
1672 acpi_scan_cb_t user_fn, void *arg)
1673 {
1674 ACPI_HANDLE h;
1675 struct acpi_device_scan_ctx ctx;
1676
1677 if (acpi_disabled("children"))
1678 return (AE_OK);
1679
1680 if (dev == NULL)
1681 h = ACPI_ROOT_OBJECT;
1682 else if ((h = acpi_get_handle(dev)) == NULL)
1683 return (AE_BAD_PARAMETER);
1684 ctx.user_fn = user_fn;
1685 ctx.arg = arg;
1686 ctx.parent = h;
1687 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth,
1688 acpi_device_scan_cb, NULL, &ctx, NULL));
1689 }
1690
1691 /*
1692 * Even though ACPI devices are not PCI, we use the PCI approach for setting
1693 * device power states since it's close enough to ACPI.
1694 */
1695 static int
1696 acpi_set_powerstate(device_t child, int state)
1697 {
1698 ACPI_HANDLE h;
1699 ACPI_STATUS status;
1700
1701 h = acpi_get_handle(child);
1702 if (state < ACPI_STATE_D0 || state > ACPI_D_STATES_MAX)
1703 return (EINVAL);
1704 if (h == NULL)
1705 return (0);
1706
1707 /* Ignore errors if the power methods aren't present. */
1708 status = acpi_pwr_switch_consumer(h, state);
1709 if (ACPI_SUCCESS(status)) {
1710 if (bootverbose)
1711 device_printf(child, "set ACPI power state D%d on %s\n",
1712 state, acpi_name(h));
1713 } else if (status != AE_NOT_FOUND)
1714 device_printf(child,
1715 "failed to set ACPI power state D%d on %s: %s\n", state,
1716 acpi_name(h), AcpiFormatException(status));
1717
1718 return (0);
1719 }
1720
1721 static int
1722 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids)
1723 {
1724 int result, cid_count, i;
1725 uint32_t lid, cids[8];
1726
1727 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1728
1729 /*
1730 * ISA-style drivers attached to ACPI may persist and
1731 * probe manually if we return ENOENT. We never want
1732 * that to happen, so don't ever return it.
1733 */
1734 result = ENXIO;
1735
1736 /* Scan the supplied IDs for a match */
1737 lid = acpi_isa_get_logicalid(child);
1738 cid_count = acpi_isa_get_compatid(child, cids, 8);
1739 while (ids && ids->ip_id) {
1740 if (lid == ids->ip_id) {
1741 result = 0;
1742 goto out;
1743 }
1744 for (i = 0; i < cid_count; i++) {
1745 if (cids[i] == ids->ip_id) {
1746 result = 0;
1747 goto out;
1748 }
1749 }
1750 ids++;
1751 }
1752
1753 out:
1754 if (result == 0 && ids->ip_desc)
1755 device_set_desc(child, ids->ip_desc);
1756
1757 return_VALUE (result);
1758 }
1759
1760 #if defined(__i386__) || defined(__amd64__)
1761 /*
1762 * Look for a MCFG table. If it is present, use the settings for
1763 * domain (segment) 0 to setup PCI config space access via the memory
1764 * map.
1765 */
1766 static void
1767 acpi_enable_pcie(void)
1768 {
1769 ACPI_TABLE_HEADER *hdr;
1770 ACPI_MCFG_ALLOCATION *alloc, *end;
1771 ACPI_STATUS status;
1772
1773 status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr);
1774 if (ACPI_FAILURE(status))
1775 return;
1776
1777 end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length);
1778 alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1);
1779 while (alloc < end) {
1780 if (alloc->PciSegment == 0) {
1781 pcie_cfgregopen(alloc->Address, alloc->StartBusNumber,
1782 alloc->EndBusNumber);
1783 return;
1784 }
1785 alloc++;
1786 }
1787 }
1788 #endif
1789
1790 /*
1791 * Scan all of the ACPI namespace and attach child devices.
1792 *
1793 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and
1794 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec.
1795 * However, in violation of the spec, some systems place their PCI link
1796 * devices in \, so we have to walk the whole namespace. We check the
1797 * type of namespace nodes, so this should be ok.
1798 */
1799 static void
1800 acpi_probe_children(device_t bus)
1801 {
1802
1803 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1804
1805 /*
1806 * Scan the namespace and insert placeholders for all the devices that
1807 * we find. We also probe/attach any early devices.
1808 *
1809 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because
1810 * we want to create nodes for all devices, not just those that are
1811 * currently present. (This assumes that we don't want to create/remove
1812 * devices as they appear, which might be smarter.)
1813 */
1814 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n"));
1815 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, acpi_probe_child,
1816 NULL, bus, NULL);
1817
1818 /* Pre-allocate resources for our rman from any sysresource devices. */
1819 acpi_sysres_alloc(bus);
1820
1821 /* Reserve resources already allocated to children. */
1822 acpi_reserve_resources(bus);
1823
1824 /* Create any static children by calling device identify methods. */
1825 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n"));
1826 bus_generic_probe(bus);
1827
1828 /* Probe/attach all children, created statically and from the namespace. */
1829 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "acpi bus_generic_attach\n"));
1830 bus_generic_attach(bus);
1831
1832 /* Attach wake sysctls. */
1833 acpi_wake_sysctl_walk(bus);
1834
1835 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n"));
1836 return_VOID;
1837 }
1838
1839 /*
1840 * Determine the probe order for a given device.
1841 */
1842 static void
1843 acpi_probe_order(ACPI_HANDLE handle, int *order)
1844 {
1845 ACPI_OBJECT_TYPE type;
1846
1847 /*
1848 * 0. CPUs
1849 * 1. I/O port and memory system resource holders
1850 * 2. Clocks and timers (to handle early accesses)
1851 * 3. Embedded controllers (to handle early accesses)
1852 * 4. PCI Link Devices
1853 */
1854 AcpiGetType(handle, &type);
1855 if (type == ACPI_TYPE_PROCESSOR)
1856 *order = 0;
1857 else if (acpi_MatchHid(handle, "PNP0C01") ||
1858 acpi_MatchHid(handle, "PNP0C02"))
1859 *order = 1;
1860 else if (acpi_MatchHid(handle, "PNP0100") ||
1861 acpi_MatchHid(handle, "PNP0103") ||
1862 acpi_MatchHid(handle, "PNP0B00"))
1863 *order = 2;
1864 else if (acpi_MatchHid(handle, "PNP0C09"))
1865 *order = 3;
1866 else if (acpi_MatchHid(handle, "PNP0C0F"))
1867 *order = 4;
1868 }
1869
1870 /*
1871 * Evaluate a child device and determine whether we might attach a device to
1872 * it.
1873 */
1874 static ACPI_STATUS
1875 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status)
1876 {
1877 struct acpi_prw_data prw;
1878 ACPI_OBJECT_TYPE type;
1879 ACPI_HANDLE h;
1880 device_t bus, child;
1881 char *handle_str;
1882 int order;
1883
1884 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1885
1886 if (acpi_disabled("children"))
1887 return_ACPI_STATUS (AE_OK);
1888
1889 /* Skip this device if we think we'll have trouble with it. */
1890 if (acpi_avoid(handle))
1891 return_ACPI_STATUS (AE_OK);
1892
1893 bus = (device_t)context;
1894 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) {
1895 handle_str = acpi_name(handle);
1896 switch (type) {
1897 case ACPI_TYPE_DEVICE:
1898 /*
1899 * Since we scan from \, be sure to skip system scope objects.
1900 * \_SB_ and \_TZ_ are defined in ACPICA as devices to work around
1901 * BIOS bugs. For example, \_SB_ is to allow \_SB_._INI to be run
1902 * during the intialization and \_TZ_ is to support Notify() on it.
1903 */
1904 if (strcmp(handle_str, "\\_SB_") == 0 ||
1905 strcmp(handle_str, "\\_TZ_") == 0)
1906 break;
1907 if (acpi_parse_prw(handle, &prw) == 0)
1908 AcpiSetupGpeForWake(handle, prw.gpe_handle, prw.gpe_bit);
1909
1910 /*
1911 * Ignore devices that do not have a _HID or _CID. They should
1912 * be discovered by other buses (e.g. the PCI bus driver).
1913 */
1914 if (!acpi_has_hid(handle))
1915 break;
1916 /* FALLTHROUGH */
1917 case ACPI_TYPE_PROCESSOR:
1918 case ACPI_TYPE_THERMAL:
1919 case ACPI_TYPE_POWER:
1920 /*
1921 * Create a placeholder device for this node. Sort the
1922 * placeholder so that the probe/attach passes will run
1923 * breadth-first. Orders less than ACPI_DEV_BASE_ORDER
1924 * are reserved for special objects (i.e., system
1925 * resources).
1926 */
1927 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str));
1928 order = level * 10 + ACPI_DEV_BASE_ORDER;
1929 acpi_probe_order(handle, &order);
1930 child = BUS_ADD_CHILD(bus, order, NULL, -1);
1931 if (child == NULL)
1932 break;
1933
1934 /* Associate the handle with the device_t and vice versa. */
1935 acpi_set_handle(child, handle);
1936 AcpiAttachData(handle, acpi_fake_objhandler, child);
1937
1938 /*
1939 * Check that the device is present. If it's not present,
1940 * leave it disabled (so that we have a device_t attached to
1941 * the handle, but we don't probe it).
1942 *
1943 * XXX PCI link devices sometimes report "present" but not
1944 * "functional" (i.e. if disabled). Go ahead and probe them
1945 * anyway since we may enable them later.
1946 */
1947 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) {
1948 /* Never disable PCI link devices. */
1949 if (acpi_MatchHid(handle, "PNP0C0F"))
1950 break;
1951 /*
1952 * Docking stations should remain enabled since the system
1953 * may be undocked at boot.
1954 */
1955 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h)))
1956 break;
1957
1958 device_disable(child);
1959 break;
1960 }
1961
1962 /*
1963 * Get the device's resource settings and attach them.
1964 * Note that if the device has _PRS but no _CRS, we need
1965 * to decide when it's appropriate to try to configure the
1966 * device. Ignore the return value here; it's OK for the
1967 * device not to have any resources.
1968 */
1969 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL);
1970 break;
1971 }
1972 }
1973
1974 return_ACPI_STATUS (AE_OK);
1975 }
1976
1977 /*
1978 * AcpiAttachData() requires an object handler but never uses it. This is a
1979 * placeholder object handler so we can store a device_t in an ACPI_HANDLE.
1980 */
1981 void
1982 acpi_fake_objhandler(ACPI_HANDLE h, void *data)
1983 {
1984 }
1985
1986 static void
1987 acpi_shutdown_final(void *arg, int howto)
1988 {
1989 struct acpi_softc *sc = (struct acpi_softc *)arg;
1990 register_t intr;
1991 ACPI_STATUS status;
1992
1993 /*
1994 * XXX Shutdown code should only run on the BSP (cpuid 0).
1995 * Some chipsets do not power off the system correctly if called from
1996 * an AP.
1997 */
1998 if ((howto & RB_POWEROFF) != 0) {
1999 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5);
2000 if (ACPI_FAILURE(status)) {
2001 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n",
2002 AcpiFormatException(status));
2003 return;
2004 }
2005 device_printf(sc->acpi_dev, "Powering system off\n");
2006 intr = intr_disable();
2007 status = AcpiEnterSleepState(ACPI_STATE_S5);
2008 if (ACPI_FAILURE(status)) {
2009 intr_restore(intr);
2010 device_printf(sc->acpi_dev, "power-off failed - %s\n",
2011 AcpiFormatException(status));
2012 } else {
2013 DELAY(1000000);
2014 intr_restore(intr);
2015 device_printf(sc->acpi_dev, "power-off failed - timeout\n");
2016 }
2017 } else if ((howto & RB_HALT) == 0 && sc->acpi_handle_reboot) {
2018 /* Reboot using the reset register. */
2019 status = AcpiReset();
2020 if (ACPI_SUCCESS(status)) {
2021 DELAY(1000000);
2022 device_printf(sc->acpi_dev, "reset failed - timeout\n");
2023 } else if (status != AE_NOT_EXIST)
2024 device_printf(sc->acpi_dev, "reset failed - %s\n",
2025 AcpiFormatException(status));
2026 } else if (sc->acpi_do_disable && panicstr == NULL) {
2027 /*
2028 * Only disable ACPI if the user requested. On some systems, writing
2029 * the disable value to SMI_CMD hangs the system.
2030 */
2031 device_printf(sc->acpi_dev, "Shutting down\n");
2032 AcpiTerminate();
2033 }
2034 }
2035
2036 static void
2037 acpi_enable_fixed_events(struct acpi_softc *sc)
2038 {
2039 static int first_time = 1;
2040
2041 /* Enable and clear fixed events and install handlers. */
2042 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) {
2043 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON);
2044 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON,
2045 acpi_event_power_button_sleep, sc);
2046 if (first_time)
2047 device_printf(sc->acpi_dev, "Power Button (fixed)\n");
2048 }
2049 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) {
2050 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON);
2051 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON,
2052 acpi_event_sleep_button_sleep, sc);
2053 if (first_time)
2054 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n");
2055 }
2056
2057 first_time = 0;
2058 }
2059
2060 /*
2061 * Returns true if the device is actually present and should
2062 * be attached to. This requires the present, enabled, UI-visible
2063 * and diagnostics-passed bits to be set.
2064 */
2065 BOOLEAN
2066 acpi_DeviceIsPresent(device_t dev)
2067 {
2068 ACPI_DEVICE_INFO *devinfo;
2069 ACPI_HANDLE h;
2070 BOOLEAN present;
2071
2072 if ((h = acpi_get_handle(dev)) == NULL ||
2073 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
2074 return (FALSE);
2075
2076 /* If no _STA method, must be present */
2077 present = (devinfo->Valid & ACPI_VALID_STA) == 0 ||
2078 ACPI_DEVICE_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE;
2079
2080 AcpiOsFree(devinfo);
2081 return (present);
2082 }
2083
2084 /*
2085 * Returns true if the battery is actually present and inserted.
2086 */
2087 BOOLEAN
2088 acpi_BatteryIsPresent(device_t dev)
2089 {
2090 ACPI_DEVICE_INFO *devinfo;
2091 ACPI_HANDLE h;
2092 BOOLEAN present;
2093
2094 if ((h = acpi_get_handle(dev)) == NULL ||
2095 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
2096 return (FALSE);
2097
2098 /* If no _STA method, must be present */
2099 present = (devinfo->Valid & ACPI_VALID_STA) == 0 ||
2100 ACPI_BATTERY_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE;
2101
2102 AcpiOsFree(devinfo);
2103 return (present);
2104 }
2105
2106 /*
2107 * Returns true if a device has at least one valid device ID.
2108 */
2109 static BOOLEAN
2110 acpi_has_hid(ACPI_HANDLE h)
2111 {
2112 ACPI_DEVICE_INFO *devinfo;
2113 BOOLEAN ret;
2114
2115 if (h == NULL ||
2116 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
2117 return (FALSE);
2118
2119 ret = FALSE;
2120 if ((devinfo->Valid & ACPI_VALID_HID) != 0)
2121 ret = TRUE;
2122 else if ((devinfo->Valid & ACPI_VALID_CID) != 0)
2123 if (devinfo->CompatibleIdList.Count > 0)
2124 ret = TRUE;
2125
2126 AcpiOsFree(devinfo);
2127 return (ret);
2128 }
2129
2130 /*
2131 * Match a HID string against a handle
2132 */
2133 BOOLEAN
2134 acpi_MatchHid(ACPI_HANDLE h, const char *hid)
2135 {
2136 ACPI_DEVICE_INFO *devinfo;
2137 BOOLEAN ret;
2138 int i;
2139
2140 if (hid == NULL || h == NULL ||
2141 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
2142 return (FALSE);
2143
2144 ret = FALSE;
2145 if ((devinfo->Valid & ACPI_VALID_HID) != 0 &&
2146 strcmp(hid, devinfo->HardwareId.String) == 0)
2147 ret = TRUE;
2148 else if ((devinfo->Valid & ACPI_VALID_CID) != 0)
2149 for (i = 0; i < devinfo->CompatibleIdList.Count; i++) {
2150 if (strcmp(hid, devinfo->CompatibleIdList.Ids[i].String) == 0) {
2151 ret = TRUE;
2152 break;
2153 }
2154 }
2155
2156 AcpiOsFree(devinfo);
2157 return (ret);
2158 }
2159
2160 /*
2161 * Return the handle of a named object within our scope, ie. that of (parent)
2162 * or one if its parents.
2163 */
2164 ACPI_STATUS
2165 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result)
2166 {
2167 ACPI_HANDLE r;
2168 ACPI_STATUS status;
2169
2170 /* Walk back up the tree to the root */
2171 for (;;) {
2172 status = AcpiGetHandle(parent, path, &r);
2173 if (ACPI_SUCCESS(status)) {
2174 *result = r;
2175 return (AE_OK);
2176 }
2177 /* XXX Return error here? */
2178 if (status != AE_NOT_FOUND)
2179 return (AE_OK);
2180 if (ACPI_FAILURE(AcpiGetParent(parent, &r)))
2181 return (AE_NOT_FOUND);
2182 parent = r;
2183 }
2184 }
2185
2186 /*
2187 * Allocate a buffer with a preset data size.
2188 */
2189 ACPI_BUFFER *
2190 acpi_AllocBuffer(int size)
2191 {
2192 ACPI_BUFFER *buf;
2193
2194 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL)
2195 return (NULL);
2196 buf->Length = size;
2197 buf->Pointer = (void *)(buf + 1);
2198 return (buf);
2199 }
2200
2201 ACPI_STATUS
2202 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number)
2203 {
2204 ACPI_OBJECT arg1;
2205 ACPI_OBJECT_LIST args;
2206
2207 arg1.Type = ACPI_TYPE_INTEGER;
2208 arg1.Integer.Value = number;
2209 args.Count = 1;
2210 args.Pointer = &arg1;
2211
2212 return (AcpiEvaluateObject(handle, path, &args, NULL));
2213 }
2214
2215 /*
2216 * Evaluate a path that should return an integer.
2217 */
2218 ACPI_STATUS
2219 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number)
2220 {
2221 ACPI_STATUS status;
2222 ACPI_BUFFER buf;
2223 ACPI_OBJECT param;
2224
2225 if (handle == NULL)
2226 handle = ACPI_ROOT_OBJECT;
2227
2228 /*
2229 * Assume that what we've been pointed at is an Integer object, or
2230 * a method that will return an Integer.
2231 */
2232 buf.Pointer = ¶m;
2233 buf.Length = sizeof(param);
2234 status = AcpiEvaluateObject(handle, path, NULL, &buf);
2235 if (ACPI_SUCCESS(status)) {
2236 if (param.Type == ACPI_TYPE_INTEGER)
2237 *number = param.Integer.Value;
2238 else
2239 status = AE_TYPE;
2240 }
2241
2242 /*
2243 * In some applications, a method that's expected to return an Integer
2244 * may instead return a Buffer (probably to simplify some internal
2245 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer,
2246 * convert it into an Integer as best we can.
2247 *
2248 * This is a hack.
2249 */
2250 if (status == AE_BUFFER_OVERFLOW) {
2251 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) {
2252 status = AE_NO_MEMORY;
2253 } else {
2254 status = AcpiEvaluateObject(handle, path, NULL, &buf);
2255 if (ACPI_SUCCESS(status))
2256 status = acpi_ConvertBufferToInteger(&buf, number);
2257 AcpiOsFree(buf.Pointer);
2258 }
2259 }
2260 return (status);
2261 }
2262
2263 ACPI_STATUS
2264 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number)
2265 {
2266 ACPI_OBJECT *p;
2267 UINT8 *val;
2268 int i;
2269
2270 p = (ACPI_OBJECT *)bufp->Pointer;
2271 if (p->Type == ACPI_TYPE_INTEGER) {
2272 *number = p->Integer.Value;
2273 return (AE_OK);
2274 }
2275 if (p->Type != ACPI_TYPE_BUFFER)
2276 return (AE_TYPE);
2277 if (p->Buffer.Length > sizeof(int))
2278 return (AE_BAD_DATA);
2279
2280 *number = 0;
2281 val = p->Buffer.Pointer;
2282 for (i = 0; i < p->Buffer.Length; i++)
2283 *number += val[i] << (i * 8);
2284 return (AE_OK);
2285 }
2286
2287 /*
2288 * Iterate over the elements of an a package object, calling the supplied
2289 * function for each element.
2290 *
2291 * XXX possible enhancement might be to abort traversal on error.
2292 */
2293 ACPI_STATUS
2294 acpi_ForeachPackageObject(ACPI_OBJECT *pkg,
2295 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg)
2296 {
2297 ACPI_OBJECT *comp;
2298 int i;
2299
2300 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE)
2301 return (AE_BAD_PARAMETER);
2302
2303 /* Iterate over components */
2304 i = 0;
2305 comp = pkg->Package.Elements;
2306 for (; i < pkg->Package.Count; i++, comp++)
2307 func(comp, arg);
2308
2309 return (AE_OK);
2310 }
2311
2312 /*
2313 * Find the (index)th resource object in a set.
2314 */
2315 ACPI_STATUS
2316 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp)
2317 {
2318 ACPI_RESOURCE *rp;
2319 int i;
2320
2321 rp = (ACPI_RESOURCE *)buf->Pointer;
2322 i = index;
2323 while (i-- > 0) {
2324 /* Range check */
2325 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length))
2326 return (AE_BAD_PARAMETER);
2327
2328 /* Check for terminator */
2329 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0)
2330 return (AE_NOT_FOUND);
2331 rp = ACPI_NEXT_RESOURCE(rp);
2332 }
2333 if (resp != NULL)
2334 *resp = rp;
2335
2336 return (AE_OK);
2337 }
2338
2339 /*
2340 * Append an ACPI_RESOURCE to an ACPI_BUFFER.
2341 *
2342 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER
2343 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible
2344 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of
2345 * resources.
2346 */
2347 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512
2348
2349 ACPI_STATUS
2350 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res)
2351 {
2352 ACPI_RESOURCE *rp;
2353 void *newp;
2354
2355 /* Initialise the buffer if necessary. */
2356 if (buf->Pointer == NULL) {
2357 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE;
2358 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL)
2359 return (AE_NO_MEMORY);
2360 rp = (ACPI_RESOURCE *)buf->Pointer;
2361 rp->Type = ACPI_RESOURCE_TYPE_END_TAG;
2362 rp->Length = ACPI_RS_SIZE_MIN;
2363 }
2364 if (res == NULL)
2365 return (AE_OK);
2366
2367 /*
2368 * Scan the current buffer looking for the terminator.
2369 * This will either find the terminator or hit the end
2370 * of the buffer and return an error.
2371 */
2372 rp = (ACPI_RESOURCE *)buf->Pointer;
2373 for (;;) {
2374 /* Range check, don't go outside the buffer */
2375 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length))
2376 return (AE_BAD_PARAMETER);
2377 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0)
2378 break;
2379 rp = ACPI_NEXT_RESOURCE(rp);
2380 }
2381
2382 /*
2383 * Check the size of the buffer and expand if required.
2384 *
2385 * Required size is:
2386 * size of existing resources before terminator +
2387 * size of new resource and header +
2388 * size of terminator.
2389 *
2390 * Note that this loop should really only run once, unless
2391 * for some reason we are stuffing a *really* huge resource.
2392 */
2393 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) +
2394 res->Length + ACPI_RS_SIZE_NO_DATA +
2395 ACPI_RS_SIZE_MIN) >= buf->Length) {
2396 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL)
2397 return (AE_NO_MEMORY);
2398 bcopy(buf->Pointer, newp, buf->Length);
2399 rp = (ACPI_RESOURCE *)((u_int8_t *)newp +
2400 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer));
2401 AcpiOsFree(buf->Pointer);
2402 buf->Pointer = newp;
2403 buf->Length += buf->Length;
2404 }
2405
2406 /* Insert the new resource. */
2407 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA);
2408
2409 /* And add the terminator. */
2410 rp = ACPI_NEXT_RESOURCE(rp);
2411 rp->Type = ACPI_RESOURCE_TYPE_END_TAG;
2412 rp->Length = ACPI_RS_SIZE_MIN;
2413
2414 return (AE_OK);
2415 }
2416
2417 /*
2418 * Set interrupt model.
2419 */
2420 ACPI_STATUS
2421 acpi_SetIntrModel(int model)
2422 {
2423
2424 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model));
2425 }
2426
2427 /*
2428 * Walk subtables of a table and call a callback routine for each
2429 * subtable. The caller should provide the first subtable and a
2430 * pointer to the end of the table. This can be used to walk tables
2431 * such as MADT and SRAT that use subtable entries.
2432 */
2433 void
2434 acpi_walk_subtables(void *first, void *end, acpi_subtable_handler *handler,
2435 void *arg)
2436 {
2437 ACPI_SUBTABLE_HEADER *entry;
2438
2439 for (entry = first; (void *)entry < end; ) {
2440 /* Avoid an infinite loop if we hit a bogus entry. */
2441 if (entry->Length < sizeof(ACPI_SUBTABLE_HEADER))
2442 return;
2443
2444 handler(entry, arg);
2445 entry = ACPI_ADD_PTR(ACPI_SUBTABLE_HEADER, entry, entry->Length);
2446 }
2447 }
2448
2449 /*
2450 * DEPRECATED. This interface has serious deficiencies and will be
2451 * removed.
2452 *
2453 * Immediately enter the sleep state. In the old model, acpiconf(8) ran
2454 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this.
2455 */
2456 ACPI_STATUS
2457 acpi_SetSleepState(struct acpi_softc *sc, int state)
2458 {
2459 static int once;
2460
2461 if (!once) {
2462 device_printf(sc->acpi_dev,
2463 "warning: acpi_SetSleepState() deprecated, need to update your software\n");
2464 once = 1;
2465 }
2466 return (acpi_EnterSleepState(sc, state));
2467 }
2468
2469 #if defined(__amd64__) || defined(__i386__)
2470 static void
2471 acpi_sleep_force_task(void *context)
2472 {
2473 struct acpi_softc *sc = (struct acpi_softc *)context;
2474
2475 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate)))
2476 device_printf(sc->acpi_dev, "force sleep state S%d failed\n",
2477 sc->acpi_next_sstate);
2478 }
2479
2480 static void
2481 acpi_sleep_force(void *arg)
2482 {
2483 struct acpi_softc *sc = (struct acpi_softc *)arg;
2484
2485 device_printf(sc->acpi_dev,
2486 "suspend request timed out, forcing sleep now\n");
2487 /*
2488 * XXX Suspending from callout cause the freeze in DEVICE_SUSPEND().
2489 * Suspend from acpi_task thread in stead.
2490 */
2491 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER,
2492 acpi_sleep_force_task, sc)))
2493 device_printf(sc->acpi_dev, "AcpiOsExecute() for sleeping failed\n");
2494 }
2495 #endif
2496
2497 /*
2498 * Request that the system enter the given suspend state. All /dev/apm
2499 * devices and devd(8) will be notified. Userland then has a chance to
2500 * save state and acknowledge the request. The system sleeps once all
2501 * acks are in.
2502 */
2503 int
2504 acpi_ReqSleepState(struct acpi_softc *sc, int state)
2505 {
2506 #if defined(__amd64__) || defined(__i386__)
2507 struct apm_clone_data *clone;
2508 ACPI_STATUS status;
2509
2510 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX)
2511 return (EINVAL);
2512 if (!acpi_sleep_states[state])
2513 return (EOPNOTSUPP);
2514
2515 /* If a suspend request is already in progress, just return. */
2516 if (sc->acpi_next_sstate != 0) {
2517 return (0);
2518 }
2519
2520 /* Wait until sleep is enabled. */
2521 while (sc->acpi_sleep_disabled) {
2522 AcpiOsSleep(1000);
2523 }
2524
2525 ACPI_LOCK(acpi);
2526
2527 sc->acpi_next_sstate = state;
2528
2529 /* S5 (soft-off) should be entered directly with no waiting. */
2530 if (state == ACPI_STATE_S5) {
2531 ACPI_UNLOCK(acpi);
2532 status = acpi_EnterSleepState(sc, state);
2533 return (ACPI_SUCCESS(status) ? 0 : ENXIO);
2534 }
2535
2536 /* Record the pending state and notify all apm devices. */
2537 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) {
2538 clone->notify_status = APM_EV_NONE;
2539 if ((clone->flags & ACPI_EVF_DEVD) == 0) {
2540 selwakeuppri(&clone->sel_read, PZERO);
2541 KNOTE_LOCKED(&clone->sel_read.si_note, 0);
2542 }
2543 }
2544
2545 /* If devd(8) is not running, immediately enter the sleep state. */
2546 if (!devctl_process_running()) {
2547 ACPI_UNLOCK(acpi);
2548 status = acpi_EnterSleepState(sc, state);
2549 return (ACPI_SUCCESS(status) ? 0 : ENXIO);
2550 }
2551
2552 /*
2553 * Set a timeout to fire if userland doesn't ack the suspend request
2554 * in time. This way we still eventually go to sleep if we were
2555 * overheating or running low on battery, even if userland is hung.
2556 * We cancel this timeout once all userland acks are in or the
2557 * suspend request is aborted.
2558 */
2559 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc);
2560 ACPI_UNLOCK(acpi);
2561
2562 /* Now notify devd(8) also. */
2563 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state);
2564
2565 return (0);
2566 #else
2567 /* This platform does not support acpi suspend/resume. */
2568 return (EOPNOTSUPP);
2569 #endif
2570 }
2571
2572 /*
2573 * Acknowledge (or reject) a pending sleep state. The caller has
2574 * prepared for suspend and is now ready for it to proceed. If the
2575 * error argument is non-zero, it indicates suspend should be cancelled
2576 * and gives an errno value describing why. Once all votes are in,
2577 * we suspend the system.
2578 */
2579 int
2580 acpi_AckSleepState(struct apm_clone_data *clone, int error)
2581 {
2582 #if defined(__amd64__) || defined(__i386__)
2583 struct acpi_softc *sc;
2584 int ret, sleeping;
2585
2586 /* If no pending sleep state, return an error. */
2587 ACPI_LOCK(acpi);
2588 sc = clone->acpi_sc;
2589 if (sc->acpi_next_sstate == 0) {
2590 ACPI_UNLOCK(acpi);
2591 return (ENXIO);
2592 }
2593
2594 /* Caller wants to abort suspend process. */
2595 if (error) {
2596 sc->acpi_next_sstate = 0;
2597 callout_stop(&sc->susp_force_to);
2598 device_printf(sc->acpi_dev,
2599 "listener on %s cancelled the pending suspend\n",
2600 devtoname(clone->cdev));
2601 ACPI_UNLOCK(acpi);
2602 return (0);
2603 }
2604
2605 /*
2606 * Mark this device as acking the suspend request. Then, walk through
2607 * all devices, seeing if they agree yet. We only count devices that
2608 * are writable since read-only devices couldn't ack the request.
2609 */
2610 sleeping = TRUE;
2611 clone->notify_status = APM_EV_ACKED;
2612 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) {
2613 if ((clone->flags & ACPI_EVF_WRITE) != 0 &&
2614 clone->notify_status != APM_EV_ACKED) {
2615 sleeping = FALSE;
2616 break;
2617 }
2618 }
2619
2620 /* If all devices have voted "yes", we will suspend now. */
2621 if (sleeping)
2622 callout_stop(&sc->susp_force_to);
2623 ACPI_UNLOCK(acpi);
2624 ret = 0;
2625 if (sleeping) {
2626 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate)))
2627 ret = ENODEV;
2628 }
2629 return (ret);
2630 #else
2631 /* This platform does not support acpi suspend/resume. */
2632 return (EOPNOTSUPP);
2633 #endif
2634 }
2635
2636 static void
2637 acpi_sleep_enable(void *arg)
2638 {
2639 struct acpi_softc *sc = (struct acpi_softc *)arg;
2640
2641 /* Reschedule if the system is not fully up and running. */
2642 if (!AcpiGbl_SystemAwakeAndRunning) {
2643 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME);
2644 return;
2645 }
2646
2647 ACPI_LOCK(acpi);
2648 sc->acpi_sleep_disabled = FALSE;
2649 ACPI_UNLOCK(acpi);
2650 }
2651
2652 static ACPI_STATUS
2653 acpi_sleep_disable(struct acpi_softc *sc)
2654 {
2655 ACPI_STATUS status;
2656
2657 /* Fail if the system is not fully up and running. */
2658 if (!AcpiGbl_SystemAwakeAndRunning)
2659 return (AE_ERROR);
2660
2661 ACPI_LOCK(acpi);
2662 status = sc->acpi_sleep_disabled ? AE_ERROR : AE_OK;
2663 sc->acpi_sleep_disabled = TRUE;
2664 ACPI_UNLOCK(acpi);
2665
2666 return (status);
2667 }
2668
2669 enum acpi_sleep_state {
2670 ACPI_SS_NONE,
2671 ACPI_SS_GPE_SET,
2672 ACPI_SS_DEV_SUSPEND,
2673 ACPI_SS_SLP_PREP,
2674 ACPI_SS_SLEPT,
2675 };
2676
2677 /*
2678 * Enter the desired system sleep state.
2679 *
2680 * Currently we support S1-S5 but S4 is only S4BIOS
2681 */
2682 static ACPI_STATUS
2683 acpi_EnterSleepState(struct acpi_softc *sc, int state)
2684 {
2685 register_t intr;
2686 ACPI_STATUS status;
2687 ACPI_EVENT_STATUS power_button_status;
2688 enum acpi_sleep_state slp_state;
2689 int sleep_result;
2690
2691 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
2692
2693 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX)
2694 return_ACPI_STATUS (AE_BAD_PARAMETER);
2695 if (!acpi_sleep_states[state]) {
2696 device_printf(sc->acpi_dev, "Sleep state S%d not supported by BIOS\n",
2697 state);
2698 return (AE_SUPPORT);
2699 }
2700
2701 /* Re-entry once we're suspending is not allowed. */
2702 status = acpi_sleep_disable(sc);
2703 if (ACPI_FAILURE(status)) {
2704 device_printf(sc->acpi_dev,
2705 "suspend request ignored (not ready yet)\n");
2706 return (status);
2707 }
2708
2709 if (state == ACPI_STATE_S5) {
2710 /*
2711 * Shut down cleanly and power off. This will call us back through the
2712 * shutdown handlers.
2713 */
2714 shutdown_nice(RB_POWEROFF);
2715 return_ACPI_STATUS (AE_OK);
2716 }
2717
2718 EVENTHANDLER_INVOKE(power_suspend);
2719
2720 if (smp_started) {
2721 thread_lock(curthread);
2722 sched_bind(curthread, 0);
2723 thread_unlock(curthread);
2724 }
2725
2726 /*
2727 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE
2728 * drivers need this.
2729 */
2730 mtx_lock(&Giant);
2731
2732 slp_state = ACPI_SS_NONE;
2733
2734 sc->acpi_sstate = state;
2735
2736 /* Enable any GPEs as appropriate and requested by the user. */
2737 acpi_wake_prep_walk(state);
2738 slp_state = ACPI_SS_GPE_SET;
2739
2740 /*
2741 * Inform all devices that we are going to sleep. If at least one
2742 * device fails, DEVICE_SUSPEND() automatically resumes the tree.
2743 *
2744 * XXX Note that a better two-pass approach with a 'veto' pass
2745 * followed by a "real thing" pass would be better, but the current
2746 * bus interface does not provide for this.
2747 */
2748 if (DEVICE_SUSPEND(root_bus) != 0) {
2749 device_printf(sc->acpi_dev, "device_suspend failed\n");
2750 goto backout;
2751 }
2752 slp_state = ACPI_SS_DEV_SUSPEND;
2753
2754 /* If testing device suspend only, back out of everything here. */
2755 if (acpi_susp_bounce)
2756 goto backout;
2757
2758 status = AcpiEnterSleepStatePrep(state);
2759 if (ACPI_FAILURE(status)) {
2760 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n",
2761 AcpiFormatException(status));
2762 goto backout;
2763 }
2764 slp_state = ACPI_SS_SLP_PREP;
2765
2766 if (sc->acpi_sleep_delay > 0)
2767 DELAY(sc->acpi_sleep_delay * 1000000);
2768
2769 intr = intr_disable();
2770 if (state != ACPI_STATE_S1) {
2771 sleep_result = acpi_sleep_machdep(sc, state);
2772 acpi_wakeup_machdep(sc, state, sleep_result, 0);
2773
2774 /*
2775 * XXX According to ACPI specification SCI_EN bit should be restored
2776 * by ACPI platform (BIOS, firmware) to its pre-sleep state.
2777 * Unfortunately some BIOSes fail to do that and that leads to
2778 * unexpected and serious consequences during wake up like a system
2779 * getting stuck in SMI handlers.
2780 * This hack is picked up from Linux, which claims that it follows
2781 * Windows behavior.
2782 */
2783 if (sleep_result == 1 && state != ACPI_STATE_S4)
2784 AcpiWriteBitRegister(ACPI_BITREG_SCI_ENABLE, ACPI_ENABLE_EVENT);
2785
2786 AcpiLeaveSleepStatePrep(state);
2787
2788 if (sleep_result == 1 && state == ACPI_STATE_S3) {
2789 /*
2790 * Prevent mis-interpretation of the wakeup by power button
2791 * as a request for power off.
2792 * Ideally we should post an appropriate wakeup event,
2793 * perhaps using acpi_event_power_button_wake or alike.
2794 *
2795 * Clearing of power button status after wakeup is mandated
2796 * by ACPI specification in section "Fixed Power Button".
2797 *
2798 * XXX As of ACPICA 20121114 AcpiGetEventStatus provides
2799 * status as 0/1 corressponding to inactive/active despite
2800 * its type being ACPI_EVENT_STATUS. In other words,
2801 * we should not test for ACPI_EVENT_FLAG_SET for time being.
2802 */
2803 if (ACPI_SUCCESS(AcpiGetEventStatus(ACPI_EVENT_POWER_BUTTON,
2804 &power_button_status)) && power_button_status != 0) {
2805 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON);
2806 device_printf(sc->acpi_dev,
2807 "cleared fixed power button status\n");
2808 }
2809 }
2810
2811 intr_restore(intr);
2812
2813 /* call acpi_wakeup_machdep() again with interrupt enabled */
2814 acpi_wakeup_machdep(sc, state, sleep_result, 1);
2815
2816 if (sleep_result == -1)
2817 goto backout;
2818
2819 /* Re-enable ACPI hardware on wakeup from sleep state 4. */
2820 if (state == ACPI_STATE_S4)
2821 AcpiEnable();
2822 } else {
2823 status = AcpiEnterSleepState(state);
2824 AcpiLeaveSleepStatePrep(state);
2825 intr_restore(intr);
2826 if (ACPI_FAILURE(status)) {
2827 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n",
2828 AcpiFormatException(status));
2829 goto backout;
2830 }
2831 }
2832 slp_state = ACPI_SS_SLEPT;
2833
2834 /*
2835 * Back out state according to how far along we got in the suspend
2836 * process. This handles both the error and success cases.
2837 */
2838 backout:
2839 if (slp_state >= ACPI_SS_GPE_SET) {
2840 acpi_wake_prep_walk(state);
2841 sc->acpi_sstate = ACPI_STATE_S0;
2842 }
2843 if (slp_state >= ACPI_SS_DEV_SUSPEND)
2844 DEVICE_RESUME(root_bus);
2845 if (slp_state >= ACPI_SS_SLP_PREP)
2846 AcpiLeaveSleepState(state);
2847 if (slp_state >= ACPI_SS_SLEPT) {
2848 acpi_resync_clock(sc);
2849 acpi_enable_fixed_events(sc);
2850 }
2851 sc->acpi_next_sstate = 0;
2852
2853 mtx_unlock(&Giant);
2854
2855 if (smp_started) {
2856 thread_lock(curthread);
2857 sched_unbind(curthread);
2858 thread_unlock(curthread);
2859 }
2860
2861 EVENTHANDLER_INVOKE(power_resume);
2862
2863 /* Allow another sleep request after a while. */
2864 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME);
2865
2866 /* Run /etc/rc.resume after we are back. */
2867 if (devctl_process_running())
2868 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state);
2869
2870 return_ACPI_STATUS (status);
2871 }
2872
2873 static void
2874 acpi_resync_clock(struct acpi_softc *sc)
2875 {
2876 #ifdef __amd64__
2877 if (!acpi_reset_clock)
2878 return;
2879
2880 /*
2881 * Warm up timecounter again and reset system clock.
2882 */
2883 (void)timecounter->tc_get_timecount(timecounter);
2884 (void)timecounter->tc_get_timecount(timecounter);
2885 inittodr(time_second + sc->acpi_sleep_delay);
2886 #endif
2887 }
2888
2889 /* Enable or disable the device's wake GPE. */
2890 int
2891 acpi_wake_set_enable(device_t dev, int enable)
2892 {
2893 struct acpi_prw_data prw;
2894 ACPI_STATUS status;
2895 int flags;
2896
2897 /* Make sure the device supports waking the system and get the GPE. */
2898 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0)
2899 return (ENXIO);
2900
2901 flags = acpi_get_flags(dev);
2902 if (enable) {
2903 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit,
2904 ACPI_GPE_ENABLE);
2905 if (ACPI_FAILURE(status)) {
2906 device_printf(dev, "enable wake failed\n");
2907 return (ENXIO);
2908 }
2909 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED);
2910 } else {
2911 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit,
2912 ACPI_GPE_DISABLE);
2913 if (ACPI_FAILURE(status)) {
2914 device_printf(dev, "disable wake failed\n");
2915 return (ENXIO);
2916 }
2917 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED);
2918 }
2919
2920 return (0);
2921 }
2922
2923 static int
2924 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate)
2925 {
2926 struct acpi_prw_data prw;
2927 device_t dev;
2928
2929 /* Check that this is a wake-capable device and get its GPE. */
2930 if (acpi_parse_prw(handle, &prw) != 0)
2931 return (ENXIO);
2932 dev = acpi_get_device(handle);
2933
2934 /*
2935 * The destination sleep state must be less than (i.e., higher power)
2936 * or equal to the value specified by _PRW. If this GPE cannot be
2937 * enabled for the next sleep state, then disable it. If it can and
2938 * the user requested it be enabled, turn on any required power resources
2939 * and set _PSW.
2940 */
2941 if (sstate > prw.lowest_wake) {
2942 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_DISABLE);
2943 if (bootverbose)
2944 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n",
2945 acpi_name(handle), sstate);
2946 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) {
2947 acpi_pwr_wake_enable(handle, 1);
2948 acpi_SetInteger(handle, "_PSW", 1);
2949 if (bootverbose)
2950 device_printf(dev, "wake_prep enabled for %s (S%d)\n",
2951 acpi_name(handle), sstate);
2952 }
2953
2954 return (0);
2955 }
2956
2957 static int
2958 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate)
2959 {
2960 struct acpi_prw_data prw;
2961 device_t dev;
2962
2963 /*
2964 * Check that this is a wake-capable device and get its GPE. Return
2965 * now if the user didn't enable this device for wake.
2966 */
2967 if (acpi_parse_prw(handle, &prw) != 0)
2968 return (ENXIO);
2969 dev = acpi_get_device(handle);
2970 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0)
2971 return (0);
2972
2973 /*
2974 * If this GPE couldn't be enabled for the previous sleep state, it was
2975 * disabled before going to sleep so re-enable it. If it was enabled,
2976 * clear _PSW and turn off any power resources it used.
2977 */
2978 if (sstate > prw.lowest_wake) {
2979 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_ENABLE);
2980 if (bootverbose)
2981 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle));
2982 } else {
2983 acpi_SetInteger(handle, "_PSW", 0);
2984 acpi_pwr_wake_enable(handle, 0);
2985 if (bootverbose)
2986 device_printf(dev, "run_prep cleaned up for %s\n",
2987 acpi_name(handle));
2988 }
2989
2990 return (0);
2991 }
2992
2993 static ACPI_STATUS
2994 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status)
2995 {
2996 int sstate;
2997
2998 /* If suspending, run the sleep prep function, otherwise wake. */
2999 sstate = *(int *)context;
3000 if (AcpiGbl_SystemAwakeAndRunning)
3001 acpi_wake_sleep_prep(handle, sstate);
3002 else
3003 acpi_wake_run_prep(handle, sstate);
3004 return (AE_OK);
3005 }
3006
3007 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */
3008 static int
3009 acpi_wake_prep_walk(int sstate)
3010 {
3011 ACPI_HANDLE sb_handle;
3012
3013 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle)))
3014 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100,
3015 acpi_wake_prep, NULL, &sstate, NULL);
3016 return (0);
3017 }
3018
3019 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */
3020 static int
3021 acpi_wake_sysctl_walk(device_t dev)
3022 {
3023 int error, i, numdevs;
3024 device_t *devlist;
3025 device_t child;
3026 ACPI_STATUS status;
3027
3028 error = device_get_children(dev, &devlist, &numdevs);
3029 if (error != 0 || numdevs == 0) {
3030 if (numdevs == 0)
3031 free(devlist, M_TEMP);
3032 return (error);
3033 }
3034 for (i = 0; i < numdevs; i++) {
3035 child = devlist[i];
3036 acpi_wake_sysctl_walk(child);
3037 if (!device_is_attached(child))
3038 continue;
3039 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL);
3040 if (ACPI_SUCCESS(status)) {
3041 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child),
3042 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO,
3043 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0,
3044 acpi_wake_set_sysctl, "I", "Device set to wake the system");
3045 }
3046 }
3047 free(devlist, M_TEMP);
3048
3049 return (0);
3050 }
3051
3052 /* Enable or disable wake from userland. */
3053 static int
3054 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS)
3055 {
3056 int enable, error;
3057 device_t dev;
3058
3059 dev = (device_t)arg1;
3060 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0;
3061
3062 error = sysctl_handle_int(oidp, &enable, 0, req);
3063 if (error != 0 || req->newptr == NULL)
3064 return (error);
3065 if (enable != 0 && enable != 1)
3066 return (EINVAL);
3067
3068 return (acpi_wake_set_enable(dev, enable));
3069 }
3070
3071 /* Parse a device's _PRW into a structure. */
3072 int
3073 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw)
3074 {
3075 ACPI_STATUS status;
3076 ACPI_BUFFER prw_buffer;
3077 ACPI_OBJECT *res, *res2;
3078 int error, i, power_count;
3079
3080 if (h == NULL || prw == NULL)
3081 return (EINVAL);
3082
3083 /*
3084 * The _PRW object (7.2.9) is only required for devices that have the
3085 * ability to wake the system from a sleeping state.
3086 */
3087 error = EINVAL;
3088 prw_buffer.Pointer = NULL;
3089 prw_buffer.Length = ACPI_ALLOCATE_BUFFER;
3090 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer);
3091 if (ACPI_FAILURE(status))
3092 return (ENOENT);
3093 res = (ACPI_OBJECT *)prw_buffer.Pointer;
3094 if (res == NULL)
3095 return (ENOENT);
3096 if (!ACPI_PKG_VALID(res, 2))
3097 goto out;
3098
3099 /*
3100 * Element 1 of the _PRW object:
3101 * The lowest power system sleeping state that can be entered while still
3102 * providing wake functionality. The sleeping state being entered must
3103 * be less than (i.e., higher power) or equal to this value.
3104 */
3105 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0)
3106 goto out;
3107
3108 /*
3109 * Element 0 of the _PRW object:
3110 */
3111 switch (res->Package.Elements[0].Type) {
3112 case ACPI_TYPE_INTEGER:
3113 /*
3114 * If the data type of this package element is numeric, then this
3115 * _PRW package element is the bit index in the GPEx_EN, in the
3116 * GPE blocks described in the FADT, of the enable bit that is
3117 * enabled for the wake event.
3118 */
3119 prw->gpe_handle = NULL;
3120 prw->gpe_bit = res->Package.Elements[0].Integer.Value;
3121 error = 0;
3122 break;
3123 case ACPI_TYPE_PACKAGE:
3124 /*
3125 * If the data type of this package element is a package, then this
3126 * _PRW package element is itself a package containing two
3127 * elements. The first is an object reference to the GPE Block
3128 * device that contains the GPE that will be triggered by the wake
3129 * event. The second element is numeric and it contains the bit
3130 * index in the GPEx_EN, in the GPE Block referenced by the
3131 * first element in the package, of the enable bit that is enabled for
3132 * the wake event.
3133 *
3134 * For example, if this field is a package then it is of the form:
3135 * Package() {\_SB.PCI0.ISA.GPE, 2}
3136 */
3137 res2 = &res->Package.Elements[0];
3138 if (!ACPI_PKG_VALID(res2, 2))
3139 goto out;
3140 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]);
3141 if (prw->gpe_handle == NULL)
3142 goto out;
3143 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0)
3144 goto out;
3145 error = 0;
3146 break;
3147 default:
3148 goto out;
3149 }
3150
3151 /* Elements 2 to N of the _PRW object are power resources. */
3152 power_count = res->Package.Count - 2;
3153 if (power_count > ACPI_PRW_MAX_POWERRES) {
3154 printf("ACPI device %s has too many power resources\n", acpi_name(h));
3155 power_count = 0;
3156 }
3157 prw->power_res_count = power_count;
3158 for (i = 0; i < power_count; i++)
3159 prw->power_res[i] = res->Package.Elements[i];
3160
3161 out:
3162 if (prw_buffer.Pointer != NULL)
3163 AcpiOsFree(prw_buffer.Pointer);
3164 return (error);
3165 }
3166
3167 /*
3168 * ACPI Event Handlers
3169 */
3170
3171 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */
3172
3173 static void
3174 acpi_system_eventhandler_sleep(void *arg, int state)
3175 {
3176 struct acpi_softc *sc = (struct acpi_softc *)arg;
3177 int ret;
3178
3179 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
3180
3181 /* Check if button action is disabled or unknown. */
3182 if (state == ACPI_STATE_UNKNOWN)
3183 return;
3184
3185 /* Request that the system prepare to enter the given suspend state. */
3186 ret = acpi_ReqSleepState(sc, state);
3187 if (ret != 0)
3188 device_printf(sc->acpi_dev,
3189 "request to enter state S%d failed (err %d)\n", state, ret);
3190
3191 return_VOID;
3192 }
3193
3194 static void
3195 acpi_system_eventhandler_wakeup(void *arg, int state)
3196 {
3197
3198 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
3199
3200 /* Currently, nothing to do for wakeup. */
3201
3202 return_VOID;
3203 }
3204
3205 /*
3206 * ACPICA Event Handlers (FixedEvent, also called from button notify handler)
3207 */
3208 static void
3209 acpi_invoke_sleep_eventhandler(void *context)
3210 {
3211
3212 EVENTHANDLER_INVOKE(acpi_sleep_event, *(int *)context);
3213 }
3214
3215 static void
3216 acpi_invoke_wake_eventhandler(void *context)
3217 {
3218
3219 EVENTHANDLER_INVOKE(acpi_wakeup_event, *(int *)context);
3220 }
3221
3222 UINT32
3223 acpi_event_power_button_sleep(void *context)
3224 {
3225 struct acpi_softc *sc = (struct acpi_softc *)context;
3226
3227 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
3228
3229 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER,
3230 acpi_invoke_sleep_eventhandler, &sc->acpi_power_button_sx)))
3231 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
3232 return_VALUE (ACPI_INTERRUPT_HANDLED);
3233 }
3234
3235 UINT32
3236 acpi_event_power_button_wake(void *context)
3237 {
3238 struct acpi_softc *sc = (struct acpi_softc *)context;
3239
3240 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
3241
3242 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER,
3243 acpi_invoke_wake_eventhandler, &sc->acpi_power_button_sx)))
3244 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
3245 return_VALUE (ACPI_INTERRUPT_HANDLED);
3246 }
3247
3248 UINT32
3249 acpi_event_sleep_button_sleep(void *context)
3250 {
3251 struct acpi_softc *sc = (struct acpi_softc *)context;
3252
3253 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
3254
3255 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER,
3256 acpi_invoke_sleep_eventhandler, &sc->acpi_sleep_button_sx)))
3257 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
3258 return_VALUE (ACPI_INTERRUPT_HANDLED);
3259 }
3260
3261 UINT32
3262 acpi_event_sleep_button_wake(void *context)
3263 {
3264 struct acpi_softc *sc = (struct acpi_softc *)context;
3265
3266 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
3267
3268 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER,
3269 acpi_invoke_wake_eventhandler, &sc->acpi_sleep_button_sx)))
3270 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
3271 return_VALUE (ACPI_INTERRUPT_HANDLED);
3272 }
3273
3274 /*
3275 * XXX This static buffer is suboptimal. There is no locking so only
3276 * use this for single-threaded callers.
3277 */
3278 char *
3279 acpi_name(ACPI_HANDLE handle)
3280 {
3281 ACPI_BUFFER buf;
3282 static char data[256];
3283
3284 buf.Length = sizeof(data);
3285 buf.Pointer = data;
3286
3287 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf)))
3288 return (data);
3289 return ("(unknown)");
3290 }
3291
3292 /*
3293 * Debugging/bug-avoidance. Avoid trying to fetch info on various
3294 * parts of the namespace.
3295 */
3296 int
3297 acpi_avoid(ACPI_HANDLE handle)
3298 {
3299 char *cp, *env, *np;
3300 int len;
3301
3302 np = acpi_name(handle);
3303 if (*np == '\\')
3304 np++;
3305 if ((env = getenv("debug.acpi.avoid")) == NULL)
3306 return (0);
3307
3308 /* Scan the avoid list checking for a match */
3309 cp = env;
3310 for (;;) {
3311 while (*cp != 0 && isspace(*cp))
3312 cp++;
3313 if (*cp == 0)
3314 break;
3315 len = 0;
3316 while (cp[len] != 0 && !isspace(cp[len]))
3317 len++;
3318 if (!strncmp(cp, np, len)) {
3319 freeenv(env);
3320 return(1);
3321 }
3322 cp += len;
3323 }
3324 freeenv(env);
3325
3326 return (0);
3327 }
3328
3329 /*
3330 * Debugging/bug-avoidance. Disable ACPI subsystem components.
3331 */
3332 int
3333 acpi_disabled(char *subsys)
3334 {
3335 char *cp, *env;
3336 int len;
3337
3338 if ((env = getenv("debug.acpi.disabled")) == NULL)
3339 return (0);
3340 if (strcmp(env, "all") == 0) {
3341 freeenv(env);
3342 return (1);
3343 }
3344
3345 /* Scan the disable list, checking for a match. */
3346 cp = env;
3347 for (;;) {
3348 while (*cp != '\0' && isspace(*cp))
3349 cp++;
3350 if (*cp == '\0')
3351 break;
3352 len = 0;
3353 while (cp[len] != '\0' && !isspace(cp[len]))
3354 len++;
3355 if (strncmp(cp, subsys, len) == 0) {
3356 freeenv(env);
3357 return (1);
3358 }
3359 cp += len;
3360 }
3361 freeenv(env);
3362
3363 return (0);
3364 }
3365
3366 /*
3367 * Control interface.
3368 *
3369 * We multiplex ioctls for all participating ACPI devices here. Individual
3370 * drivers wanting to be accessible via /dev/acpi should use the
3371 * register/deregister interface to make their handlers visible.
3372 */
3373 struct acpi_ioctl_hook
3374 {
3375 TAILQ_ENTRY(acpi_ioctl_hook) link;
3376 u_long cmd;
3377 acpi_ioctl_fn fn;
3378 void *arg;
3379 };
3380
3381 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks;
3382 static int acpi_ioctl_hooks_initted;
3383
3384 int
3385 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg)
3386 {
3387 struct acpi_ioctl_hook *hp;
3388
3389 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL)
3390 return (ENOMEM);
3391 hp->cmd = cmd;
3392 hp->fn = fn;
3393 hp->arg = arg;
3394
3395 ACPI_LOCK(acpi);
3396 if (acpi_ioctl_hooks_initted == 0) {
3397 TAILQ_INIT(&acpi_ioctl_hooks);
3398 acpi_ioctl_hooks_initted = 1;
3399 }
3400 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link);
3401 ACPI_UNLOCK(acpi);
3402
3403 return (0);
3404 }
3405
3406 void
3407 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn)
3408 {
3409 struct acpi_ioctl_hook *hp;
3410
3411 ACPI_LOCK(acpi);
3412 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link)
3413 if (hp->cmd == cmd && hp->fn == fn)
3414 break;
3415
3416 if (hp != NULL) {
3417 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link);
3418 free(hp, M_ACPIDEV);
3419 }
3420 ACPI_UNLOCK(acpi);
3421 }
3422
3423 static int
3424 acpiopen(struct cdev *dev, int flag, int fmt, struct thread *td)
3425 {
3426 return (0);
3427 }
3428
3429 static int
3430 acpiclose(struct cdev *dev, int flag, int fmt, struct thread *td)
3431 {
3432 return (0);
3433 }
3434
3435 static int
3436 acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
3437 {
3438 struct acpi_softc *sc;
3439 struct acpi_ioctl_hook *hp;
3440 int error, state;
3441
3442 error = 0;
3443 hp = NULL;
3444 sc = dev->si_drv1;
3445
3446 /*
3447 * Scan the list of registered ioctls, looking for handlers.
3448 */
3449 ACPI_LOCK(acpi);
3450 if (acpi_ioctl_hooks_initted)
3451 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) {
3452 if (hp->cmd == cmd)
3453 break;
3454 }
3455 ACPI_UNLOCK(acpi);
3456 if (hp)
3457 return (hp->fn(cmd, addr, hp->arg));
3458
3459 /*
3460 * Core ioctls are not permitted for non-writable user.
3461 * Currently, other ioctls just fetch information.
3462 * Not changing system behavior.
3463 */
3464 if ((flag & FWRITE) == 0)
3465 return (EPERM);
3466
3467 /* Core system ioctls. */
3468 switch (cmd) {
3469 case ACPIIO_REQSLPSTATE:
3470 state = *(int *)addr;
3471 if (state != ACPI_STATE_S5)
3472 return (acpi_ReqSleepState(sc, state));
3473 device_printf(sc->acpi_dev, "power off via acpi ioctl not supported\n");
3474 error = EOPNOTSUPP;
3475 break;
3476 case ACPIIO_ACKSLPSTATE:
3477 error = *(int *)addr;
3478 error = acpi_AckSleepState(sc->acpi_clone, error);
3479 break;
3480 case ACPIIO_SETSLPSTATE: /* DEPRECATED */
3481 state = *(int *)addr;
3482 if (state < ACPI_STATE_S0 || state > ACPI_S_STATES_MAX)
3483 return (EINVAL);
3484 if (!acpi_sleep_states[state])
3485 return (EOPNOTSUPP);
3486 if (ACPI_FAILURE(acpi_SetSleepState(sc, state)))
3487 error = ENXIO;
3488 break;
3489 default:
3490 error = ENXIO;
3491 break;
3492 }
3493
3494 return (error);
3495 }
3496
3497 static int
3498 acpi_sname2sstate(const char *sname)
3499 {
3500 int sstate;
3501
3502 if (toupper(sname[0]) == 'S') {
3503 sstate = sname[1] - '';
3504 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5 &&
3505 sname[2] == '\0')
3506 return (sstate);
3507 } else if (strcasecmp(sname, "NONE") == 0)
3508 return (ACPI_STATE_UNKNOWN);
3509 return (-1);
3510 }
3511
3512 static const char *
3513 acpi_sstate2sname(int sstate)
3514 {
3515 static const char *snames[] = { "S0", "S1", "S2", "S3", "S4", "S5" };
3516
3517 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5)
3518 return (snames[sstate]);
3519 else if (sstate == ACPI_STATE_UNKNOWN)
3520 return ("NONE");
3521 return (NULL);
3522 }
3523
3524 static int
3525 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
3526 {
3527 int error;
3528 struct sbuf sb;
3529 UINT8 state;
3530
3531 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND);
3532 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++)
3533 if (acpi_sleep_states[state])
3534 sbuf_printf(&sb, "%s ", acpi_sstate2sname(state));
3535 sbuf_trim(&sb);
3536 sbuf_finish(&sb);
3537 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req);
3538 sbuf_delete(&sb);
3539 return (error);
3540 }
3541
3542 static int
3543 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
3544 {
3545 char sleep_state[10];
3546 int error, new_state, old_state;
3547
3548 old_state = *(int *)oidp->oid_arg1;
3549 strlcpy(sleep_state, acpi_sstate2sname(old_state), sizeof(sleep_state));
3550 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req);
3551 if (error == 0 && req->newptr != NULL) {
3552 new_state = acpi_sname2sstate(sleep_state);
3553 if (new_state < ACPI_STATE_S1)
3554 return (EINVAL);
3555 if (new_state < ACPI_S_STATE_COUNT && !acpi_sleep_states[new_state])
3556 return (EOPNOTSUPP);
3557 if (new_state != old_state)
3558 *(int *)oidp->oid_arg1 = new_state;
3559 }
3560 return (error);
3561 }
3562
3563 /* Inform devctl(4) when we receive a Notify. */
3564 void
3565 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify)
3566 {
3567 char notify_buf[16];
3568 ACPI_BUFFER handle_buf;
3569 ACPI_STATUS status;
3570
3571 if (subsystem == NULL)
3572 return;
3573
3574 handle_buf.Pointer = NULL;
3575 handle_buf.Length = ACPI_ALLOCATE_BUFFER;
3576 status = AcpiNsHandleToPathname(h, &handle_buf);
3577 if (ACPI_FAILURE(status))
3578 return;
3579 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify);
3580 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf);
3581 AcpiOsFree(handle_buf.Pointer);
3582 }
3583
3584 #ifdef ACPI_DEBUG
3585 /*
3586 * Support for parsing debug options from the kernel environment.
3587 *
3588 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers
3589 * by specifying the names of the bits in the debug.acpi.layer and
3590 * debug.acpi.level environment variables. Bits may be unset by
3591 * prefixing the bit name with !.
3592 */
3593 struct debugtag
3594 {
3595 char *name;
3596 UINT32 value;
3597 };
3598
3599 static struct debugtag dbg_layer[] = {
3600 {"ACPI_UTILITIES", ACPI_UTILITIES},
3601 {"ACPI_HARDWARE", ACPI_HARDWARE},
3602 {"ACPI_EVENTS", ACPI_EVENTS},
3603 {"ACPI_TABLES", ACPI_TABLES},
3604 {"ACPI_NAMESPACE", ACPI_NAMESPACE},
3605 {"ACPI_PARSER", ACPI_PARSER},
3606 {"ACPI_DISPATCHER", ACPI_DISPATCHER},
3607 {"ACPI_EXECUTER", ACPI_EXECUTER},
3608 {"ACPI_RESOURCES", ACPI_RESOURCES},
3609 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER},
3610 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES},
3611 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER},
3612 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS},
3613
3614 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER},
3615 {"ACPI_BATTERY", ACPI_BATTERY},
3616 {"ACPI_BUS", ACPI_BUS},
3617 {"ACPI_BUTTON", ACPI_BUTTON},
3618 {"ACPI_EC", ACPI_EC},
3619 {"ACPI_FAN", ACPI_FAN},
3620 {"ACPI_POWERRES", ACPI_POWERRES},
3621 {"ACPI_PROCESSOR", ACPI_PROCESSOR},
3622 {"ACPI_THERMAL", ACPI_THERMAL},
3623 {"ACPI_TIMER", ACPI_TIMER},
3624 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS},
3625 {NULL, 0}
3626 };
3627
3628 static struct debugtag dbg_level[] = {
3629 {"ACPI_LV_INIT", ACPI_LV_INIT},
3630 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT},
3631 {"ACPI_LV_INFO", ACPI_LV_INFO},
3632 {"ACPI_LV_REPAIR", ACPI_LV_REPAIR},
3633 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS},
3634
3635 /* Trace verbosity level 1 [Standard Trace Level] */
3636 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES},
3637 {"ACPI_LV_PARSE", ACPI_LV_PARSE},
3638 {"ACPI_LV_LOAD", ACPI_LV_LOAD},
3639 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH},
3640 {"ACPI_LV_EXEC", ACPI_LV_EXEC},
3641 {"ACPI_LV_NAMES", ACPI_LV_NAMES},
3642 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION},
3643 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD},
3644 {"ACPI_LV_TABLES", ACPI_LV_TABLES},
3645 {"ACPI_LV_VALUES", ACPI_LV_VALUES},
3646 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS},
3647 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES},
3648 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS},
3649 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE},
3650 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1},
3651
3652 /* Trace verbosity level 2 [Function tracing and memory allocation] */
3653 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS},
3654 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS},
3655 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS},
3656 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2},
3657 {"ACPI_LV_ALL", ACPI_LV_ALL},
3658
3659 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */
3660 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX},
3661 {"ACPI_LV_THREADS", ACPI_LV_THREADS},
3662 {"ACPI_LV_IO", ACPI_LV_IO},
3663 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS},
3664 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3},
3665
3666 /* Exceptionally verbose output -- also used in the global "DebugLevel" */
3667 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE},
3668 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO},
3669 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES},
3670 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS},
3671 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE},
3672 {NULL, 0}
3673 };
3674
3675 static void
3676 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag)
3677 {
3678 char *ep;
3679 int i, l;
3680 int set;
3681
3682 while (*cp) {
3683 if (isspace(*cp)) {
3684 cp++;
3685 continue;
3686 }
3687 ep = cp;
3688 while (*ep && !isspace(*ep))
3689 ep++;
3690 if (*cp == '!') {
3691 set = 0;
3692 cp++;
3693 if (cp == ep)
3694 continue;
3695 } else {
3696 set = 1;
3697 }
3698 l = ep - cp;
3699 for (i = 0; tag[i].name != NULL; i++) {
3700 if (!strncmp(cp, tag[i].name, l)) {
3701 if (set)
3702 *flag |= tag[i].value;
3703 else
3704 *flag &= ~tag[i].value;
3705 }
3706 }
3707 cp = ep;
3708 }
3709 }
3710
3711 static void
3712 acpi_set_debugging(void *junk)
3713 {
3714 char *layer, *level;
3715
3716 if (cold) {
3717 AcpiDbgLayer = 0;
3718 AcpiDbgLevel = 0;
3719 }
3720
3721 layer = getenv("debug.acpi.layer");
3722 level = getenv("debug.acpi.level");
3723 if (layer == NULL && level == NULL)
3724 return;
3725
3726 printf("ACPI set debug");
3727 if (layer != NULL) {
3728 if (strcmp("NONE", layer) != 0)
3729 printf(" layer '%s'", layer);
3730 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer);
3731 freeenv(layer);
3732 }
3733 if (level != NULL) {
3734 if (strcmp("NONE", level) != 0)
3735 printf(" level '%s'", level);
3736 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel);
3737 freeenv(level);
3738 }
3739 printf("\n");
3740 }
3741
3742 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging,
3743 NULL);
3744
3745 static int
3746 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS)
3747 {
3748 int error, *dbg;
3749 struct debugtag *tag;
3750 struct sbuf sb;
3751
3752 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL)
3753 return (ENOMEM);
3754 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) {
3755 tag = &dbg_layer[0];
3756 dbg = &AcpiDbgLayer;
3757 } else {
3758 tag = &dbg_level[0];
3759 dbg = &AcpiDbgLevel;
3760 }
3761
3762 /* Get old values if this is a get request. */
3763 ACPI_SERIAL_BEGIN(acpi);
3764 if (*dbg == 0) {
3765 sbuf_cpy(&sb, "NONE");
3766 } else if (req->newptr == NULL) {
3767 for (; tag->name != NULL; tag++) {
3768 if ((*dbg & tag->value) == tag->value)
3769 sbuf_printf(&sb, "%s ", tag->name);
3770 }
3771 }
3772 sbuf_trim(&sb);
3773 sbuf_finish(&sb);
3774
3775 /* Copy out the old values to the user. */
3776 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb));
3777 sbuf_delete(&sb);
3778
3779 /* If the user is setting a string, parse it. */
3780 if (error == 0 && req->newptr != NULL) {
3781 *dbg = 0;
3782 setenv((char *)oidp->oid_arg1, (char *)req->newptr);
3783 acpi_set_debugging(NULL);
3784 }
3785 ACPI_SERIAL_END(acpi);
3786
3787 return (error);
3788 }
3789
3790 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING,
3791 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", "");
3792 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING,
3793 "debug.acpi.level", 0, acpi_debug_sysctl, "A", "");
3794 #endif /* ACPI_DEBUG */
3795
3796 static int
3797 acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS)
3798 {
3799 int error;
3800 int old;
3801
3802 old = acpi_debug_objects;
3803 error = sysctl_handle_int(oidp, &acpi_debug_objects, 0, req);
3804 if (error != 0 || req->newptr == NULL)
3805 return (error);
3806 if (old == acpi_debug_objects || (old && acpi_debug_objects))
3807 return (0);
3808
3809 ACPI_SERIAL_BEGIN(acpi);
3810 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE;
3811 ACPI_SERIAL_END(acpi);
3812
3813 return (0);
3814 }
3815
3816 static int
3817 acpi_parse_interfaces(char *str, struct acpi_interface *iface)
3818 {
3819 char *p;
3820 size_t len;
3821 int i, j;
3822
3823 p = str;
3824 while (isspace(*p) || *p == ',')
3825 p++;
3826 len = strlen(p);
3827 if (len == 0)
3828 return (0);
3829 p = strdup(p, M_TEMP);
3830 for (i = 0; i < len; i++)
3831 if (p[i] == ',')
3832 p[i] = '\0';
3833 i = j = 0;
3834 while (i < len)
3835 if (isspace(p[i]) || p[i] == '\0')
3836 i++;
3837 else {
3838 i += strlen(p + i) + 1;
3839 j++;
3840 }
3841 if (j == 0) {
3842 free(p, M_TEMP);
3843 return (0);
3844 }
3845 iface->data = malloc(sizeof(*iface->data) * j, M_TEMP, M_WAITOK);
3846 iface->num = j;
3847 i = j = 0;
3848 while (i < len)
3849 if (isspace(p[i]) || p[i] == '\0')
3850 i++;
3851 else {
3852 iface->data[j] = p + i;
3853 i += strlen(p + i) + 1;
3854 j++;
3855 }
3856
3857 return (j);
3858 }
3859
3860 static void
3861 acpi_free_interfaces(struct acpi_interface *iface)
3862 {
3863
3864 free(iface->data[0], M_TEMP);
3865 free(iface->data, M_TEMP);
3866 }
3867
3868 static void
3869 acpi_reset_interfaces(device_t dev)
3870 {
3871 struct acpi_interface list;
3872 ACPI_STATUS status;
3873 int i;
3874
3875 if (acpi_parse_interfaces(acpi_install_interface, &list) > 0) {
3876 for (i = 0; i < list.num; i++) {
3877 status = AcpiInstallInterface(list.data[i]);
3878 if (ACPI_FAILURE(status))
3879 device_printf(dev,
3880 "failed to install _OSI(\"%s\"): %s\n",
3881 list.data[i], AcpiFormatException(status));
3882 else if (bootverbose)
3883 device_printf(dev, "installed _OSI(\"%s\")\n",
3884 list.data[i]);
3885 }
3886 acpi_free_interfaces(&list);
3887 }
3888 if (acpi_parse_interfaces(acpi_remove_interface, &list) > 0) {
3889 for (i = 0; i < list.num; i++) {
3890 status = AcpiRemoveInterface(list.data[i]);
3891 if (ACPI_FAILURE(status))
3892 device_printf(dev,
3893 "failed to remove _OSI(\"%s\"): %s\n",
3894 list.data[i], AcpiFormatException(status));
3895 else if (bootverbose)
3896 device_printf(dev, "removed _OSI(\"%s\")\n",
3897 list.data[i]);
3898 }
3899 acpi_free_interfaces(&list);
3900 }
3901 }
3902
3903 static int
3904 acpi_pm_func(u_long cmd, void *arg, ...)
3905 {
3906 int state, acpi_state;
3907 int error;
3908 struct acpi_softc *sc;
3909 va_list ap;
3910
3911 error = 0;
3912 switch (cmd) {
3913 case POWER_CMD_SUSPEND:
3914 sc = (struct acpi_softc *)arg;
3915 if (sc == NULL) {
3916 error = EINVAL;
3917 goto out;
3918 }
3919
3920 va_start(ap, arg);
3921 state = va_arg(ap, int);
3922 va_end(ap);
3923
3924 switch (state) {
3925 case POWER_SLEEP_STATE_STANDBY:
3926 acpi_state = sc->acpi_standby_sx;
3927 break;
3928 case POWER_SLEEP_STATE_SUSPEND:
3929 acpi_state = sc->acpi_suspend_sx;
3930 break;
3931 case POWER_SLEEP_STATE_HIBERNATE:
3932 acpi_state = ACPI_STATE_S4;
3933 break;
3934 default:
3935 error = EINVAL;
3936 goto out;
3937 }
3938
3939 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state)))
3940 error = ENXIO;
3941 break;
3942 default:
3943 error = EINVAL;
3944 goto out;
3945 }
3946
3947 out:
3948 return (error);
3949 }
3950
3951 static void
3952 acpi_pm_register(void *arg)
3953 {
3954 if (!cold || resource_disabled("acpi", 0))
3955 return;
3956
3957 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL);
3958 }
3959
3960 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0);
Cache object: 647086bbc2e6c0587df336a4357b80d6
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