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/9.0/sys/dev/acpica/acpi.c 227397 2011-11-09 18:12:42Z 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 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 int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate);
156 static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate);
157 static int acpi_wake_prep_walk(int sstate);
158 static int acpi_wake_sysctl_walk(device_t dev);
159 static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS);
160 static void acpi_system_eventhandler_sleep(void *arg, int state);
161 static void acpi_system_eventhandler_wakeup(void *arg, int state);
162 static int acpi_sname2sstate(const char *sname);
163 static const char *acpi_sstate2sname(int sstate);
164 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS);
165 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS);
166 static int acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS);
167 static int acpi_pm_func(u_long cmd, void *arg, ...);
168 static int acpi_child_location_str_method(device_t acdev, device_t child,
169 char *buf, size_t buflen);
170 static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child,
171 char *buf, size_t buflen);
172 #if defined(__i386__) || defined(__amd64__)
173 static void acpi_enable_pcie(void);
174 #endif
175 static void acpi_hint_device_unit(device_t acdev, device_t child,
176 const char *name, int *unitp);
177 static void acpi_reset_interfaces(device_t dev);
178
179 static device_method_t acpi_methods[] = {
180 /* Device interface */
181 DEVMETHOD(device_probe, acpi_probe),
182 DEVMETHOD(device_attach, acpi_attach),
183 DEVMETHOD(device_shutdown, acpi_shutdown),
184 DEVMETHOD(device_detach, bus_generic_detach),
185 DEVMETHOD(device_suspend, acpi_suspend),
186 DEVMETHOD(device_resume, acpi_resume),
187
188 /* Bus interface */
189 DEVMETHOD(bus_add_child, acpi_add_child),
190 DEVMETHOD(bus_print_child, acpi_print_child),
191 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch),
192 DEVMETHOD(bus_driver_added, acpi_driver_added),
193 DEVMETHOD(bus_read_ivar, acpi_read_ivar),
194 DEVMETHOD(bus_write_ivar, acpi_write_ivar),
195 DEVMETHOD(bus_get_resource_list, acpi_get_rlist),
196 DEVMETHOD(bus_set_resource, acpi_set_resource),
197 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
198 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource),
199 DEVMETHOD(bus_adjust_resource, acpi_adjust_resource),
200 DEVMETHOD(bus_release_resource, acpi_release_resource),
201 DEVMETHOD(bus_delete_resource, acpi_delete_resource),
202 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method),
203 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method),
204 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
205 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
206 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
207 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
208 DEVMETHOD(bus_hint_device_unit, acpi_hint_device_unit),
209
210 /* ACPI bus */
211 DEVMETHOD(acpi_id_probe, acpi_device_id_probe),
212 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj),
213 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep),
214 DEVMETHOD(acpi_scan_children, acpi_device_scan_children),
215
216 /* ISA emulation */
217 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe),
218
219 {0, 0}
220 };
221
222 static driver_t acpi_driver = {
223 "acpi",
224 acpi_methods,
225 sizeof(struct acpi_softc),
226 };
227
228 static devclass_t acpi_devclass;
229 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0);
230 MODULE_VERSION(acpi, 1);
231
232 ACPI_SERIAL_DECL(acpi, "ACPI root bus");
233
234 /* Local pools for managing system resources for ACPI child devices. */
235 static struct rman acpi_rman_io, acpi_rman_mem;
236
237 #define ACPI_MINIMUM_AWAKETIME 5
238
239 /* Holds the description of the acpi0 device. */
240 static char acpi_desc[ACPI_OEM_ID_SIZE + ACPI_OEM_TABLE_ID_SIZE + 2];
241
242 SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging");
243 static char acpi_ca_version[12];
244 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD,
245 acpi_ca_version, 0, "Version of Intel ACPI-CA");
246
247 /*
248 * Allow overriding _OSI methods.
249 */
250 static char acpi_install_interface[256];
251 TUNABLE_STR("hw.acpi.install_interface", acpi_install_interface,
252 sizeof(acpi_install_interface));
253 static char acpi_remove_interface[256];
254 TUNABLE_STR("hw.acpi.remove_interface", acpi_remove_interface,
255 sizeof(acpi_remove_interface));
256
257 /*
258 * Allow override of whether methods execute in parallel or not.
259 * Enable this for serial behavior, which fixes "AE_ALREADY_EXISTS"
260 * errors for AML that really can't handle parallel method execution.
261 * It is off by default since this breaks recursive methods and
262 * some IBMs use such code.
263 */
264 static int acpi_serialize_methods;
265 TUNABLE_INT("hw.acpi.serialize_methods", &acpi_serialize_methods);
266
267 /* Allow users to dump Debug objects without ACPI debugger. */
268 static int acpi_debug_objects;
269 TUNABLE_INT("debug.acpi.enable_debug_objects", &acpi_debug_objects);
270 SYSCTL_PROC(_debug_acpi, OID_AUTO, enable_debug_objects,
271 CTLFLAG_RW | CTLTYPE_INT, NULL, 0, acpi_debug_objects_sysctl, "I",
272 "Enable Debug objects");
273
274 /* Allow the interpreter to ignore common mistakes in BIOS. */
275 static int acpi_interpreter_slack = 1;
276 TUNABLE_INT("debug.acpi.interpreter_slack", &acpi_interpreter_slack);
277 SYSCTL_INT(_debug_acpi, OID_AUTO, interpreter_slack, CTLFLAG_RDTUN,
278 &acpi_interpreter_slack, 1, "Turn on interpreter slack mode.");
279
280 /* Reset system clock while resuming. XXX Remove once tested. */
281 static int acpi_reset_clock = 1;
282 TUNABLE_INT("debug.acpi.reset_clock", &acpi_reset_clock);
283 SYSCTL_INT(_debug_acpi, OID_AUTO, reset_clock, CTLFLAG_RW,
284 &acpi_reset_clock, 1, "Reset system clock while resuming.");
285
286 /* Allow users to override quirks. */
287 TUNABLE_INT("debug.acpi.quirks", &acpi_quirks);
288
289 static int acpi_susp_bounce;
290 SYSCTL_INT(_debug_acpi, OID_AUTO, suspend_bounce, CTLFLAG_RW,
291 &acpi_susp_bounce, 0, "Don't actually suspend, just test devices.");
292
293 /*
294 * ACPI can only be loaded as a module by the loader; activating it after
295 * system bootstrap time is not useful, and can be fatal to the system.
296 * It also cannot be unloaded, since the entire system bus hierarchy hangs
297 * off it.
298 */
299 static int
300 acpi_modevent(struct module *mod, int event, void *junk)
301 {
302 switch (event) {
303 case MOD_LOAD:
304 if (!cold) {
305 printf("The ACPI driver cannot be loaded after boot.\n");
306 return (EPERM);
307 }
308 break;
309 case MOD_UNLOAD:
310 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI)
311 return (EBUSY);
312 break;
313 default:
314 break;
315 }
316 return (0);
317 }
318
319 /*
320 * Perform early initialization.
321 */
322 ACPI_STATUS
323 acpi_Startup(void)
324 {
325 static int started = 0;
326 ACPI_STATUS status;
327 int val;
328
329 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
330
331 /* Only run the startup code once. The MADT driver also calls this. */
332 if (started)
333 return_VALUE (AE_OK);
334 started = 1;
335
336 /*
337 * Pre-allocate space for RSDT/XSDT and DSDT tables and allow resizing
338 * if more tables exist.
339 */
340 if (ACPI_FAILURE(status = AcpiInitializeTables(NULL, 2, TRUE))) {
341 printf("ACPI: Table initialisation failed: %s\n",
342 AcpiFormatException(status));
343 return_VALUE (status);
344 }
345
346 /* Set up any quirks we have for this system. */
347 if (acpi_quirks == ACPI_Q_OK)
348 acpi_table_quirks(&acpi_quirks);
349
350 /* If the user manually set the disabled hint to 0, force-enable ACPI. */
351 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0)
352 acpi_quirks &= ~ACPI_Q_BROKEN;
353 if (acpi_quirks & ACPI_Q_BROKEN) {
354 printf("ACPI disabled by blacklist. Contact your BIOS vendor.\n");
355 status = AE_SUPPORT;
356 }
357
358 return_VALUE (status);
359 }
360
361 /*
362 * Detect ACPI and perform early initialisation.
363 */
364 int
365 acpi_identify(void)
366 {
367 ACPI_TABLE_RSDP *rsdp;
368 ACPI_TABLE_HEADER *rsdt;
369 ACPI_PHYSICAL_ADDRESS paddr;
370 struct sbuf sb;
371
372 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
373
374 if (!cold)
375 return (ENXIO);
376
377 /* Check that we haven't been disabled with a hint. */
378 if (resource_disabled("acpi", 0))
379 return (ENXIO);
380
381 /* Check for other PM systems. */
382 if (power_pm_get_type() != POWER_PM_TYPE_NONE &&
383 power_pm_get_type() != POWER_PM_TYPE_ACPI) {
384 printf("ACPI identify failed, other PM system enabled.\n");
385 return (ENXIO);
386 }
387
388 /* Initialize root tables. */
389 if (ACPI_FAILURE(acpi_Startup())) {
390 printf("ACPI: Try disabling either ACPI or apic support.\n");
391 return (ENXIO);
392 }
393
394 if ((paddr = AcpiOsGetRootPointer()) == 0 ||
395 (rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP))) == NULL)
396 return (ENXIO);
397 if (rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress != 0)
398 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress;
399 else
400 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress;
401 AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP));
402
403 if ((rsdt = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER))) == NULL)
404 return (ENXIO);
405 sbuf_new(&sb, acpi_desc, sizeof(acpi_desc), SBUF_FIXEDLEN);
406 sbuf_bcat(&sb, rsdt->OemId, ACPI_OEM_ID_SIZE);
407 sbuf_trim(&sb);
408 sbuf_putc(&sb, ' ');
409 sbuf_bcat(&sb, rsdt->OemTableId, ACPI_OEM_TABLE_ID_SIZE);
410 sbuf_trim(&sb);
411 sbuf_finish(&sb);
412 sbuf_delete(&sb);
413 AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER));
414
415 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%x", ACPI_CA_VERSION);
416
417 return (0);
418 }
419
420 /*
421 * Fetch some descriptive data from ACPI to put in our attach message.
422 */
423 static int
424 acpi_probe(device_t dev)
425 {
426
427 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
428
429 device_set_desc(dev, acpi_desc);
430
431 return_VALUE (0);
432 }
433
434 static int
435 acpi_attach(device_t dev)
436 {
437 struct acpi_softc *sc;
438 ACPI_STATUS status;
439 int error, state;
440 UINT32 flags;
441 UINT8 TypeA, TypeB;
442 char *env;
443
444 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
445
446 sc = device_get_softc(dev);
447 sc->acpi_dev = dev;
448 callout_init(&sc->susp_force_to, TRUE);
449
450 error = ENXIO;
451
452 /* Initialize resource manager. */
453 acpi_rman_io.rm_type = RMAN_ARRAY;
454 acpi_rman_io.rm_start = 0;
455 acpi_rman_io.rm_end = 0xffff;
456 acpi_rman_io.rm_descr = "ACPI I/O ports";
457 if (rman_init(&acpi_rman_io) != 0)
458 panic("acpi rman_init IO ports failed");
459 acpi_rman_mem.rm_type = RMAN_ARRAY;
460 acpi_rman_mem.rm_start = 0;
461 acpi_rman_mem.rm_end = ~0ul;
462 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses";
463 if (rman_init(&acpi_rman_mem) != 0)
464 panic("acpi rman_init memory failed");
465
466 /* Initialise the ACPI mutex */
467 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF);
468
469 /*
470 * Set the globals from our tunables. This is needed because ACPI-CA
471 * uses UINT8 for some values and we have no tunable_byte.
472 */
473 AcpiGbl_AllMethodsSerialized = acpi_serialize_methods ? TRUE : FALSE;
474 AcpiGbl_EnableInterpreterSlack = acpi_interpreter_slack ? TRUE : FALSE;
475 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE;
476
477 #ifndef ACPI_DEBUG
478 /*
479 * Disable all debugging layers and levels.
480 */
481 AcpiDbgLayer = 0;
482 AcpiDbgLevel = 0;
483 #endif
484
485 /* Start up the ACPI CA subsystem. */
486 status = AcpiInitializeSubsystem();
487 if (ACPI_FAILURE(status)) {
488 device_printf(dev, "Could not initialize Subsystem: %s\n",
489 AcpiFormatException(status));
490 goto out;
491 }
492
493 /* Override OS interfaces if the user requested. */
494 acpi_reset_interfaces(dev);
495
496 /* Load ACPI name space. */
497 status = AcpiLoadTables();
498 if (ACPI_FAILURE(status)) {
499 device_printf(dev, "Could not load Namespace: %s\n",
500 AcpiFormatException(status));
501 goto out;
502 }
503
504 #if defined(__i386__) || defined(__amd64__)
505 /* Handle MCFG table if present. */
506 acpi_enable_pcie();
507 #endif
508
509 /*
510 * Note that some systems (specifically, those with namespace evaluation
511 * issues that require the avoidance of parts of the namespace) must
512 * avoid running _INI and _STA on everything, as well as dodging the final
513 * object init pass.
514 *
515 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT).
516 *
517 * XXX We should arrange for the object init pass after we have attached
518 * all our child devices, but on many systems it works here.
519 */
520 flags = 0;
521 if (testenv("debug.acpi.avoid"))
522 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT;
523
524 /* Bring the hardware and basic handlers online. */
525 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) {
526 device_printf(dev, "Could not enable ACPI: %s\n",
527 AcpiFormatException(status));
528 goto out;
529 }
530
531 /*
532 * Call the ECDT probe function to provide EC functionality before
533 * the namespace has been evaluated.
534 *
535 * XXX This happens before the sysresource devices have been probed and
536 * attached so its resources come from nexus0. In practice, this isn't
537 * a problem but should be addressed eventually.
538 */
539 acpi_ec_ecdt_probe(dev);
540
541 /* Bring device objects and regions online. */
542 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) {
543 device_printf(dev, "Could not initialize ACPI objects: %s\n",
544 AcpiFormatException(status));
545 goto out;
546 }
547
548 /*
549 * Setup our sysctl tree.
550 *
551 * XXX: This doesn't check to make sure that none of these fail.
552 */
553 sysctl_ctx_init(&sc->acpi_sysctl_ctx);
554 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx,
555 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO,
556 device_get_name(dev), CTLFLAG_RD, 0, "");
557 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
558 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD,
559 0, 0, acpi_supported_sleep_state_sysctl, "A", "");
560 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
561 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW,
562 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", "");
563 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
564 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW,
565 &sc->acpi_sleep_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, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW,
568 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", "");
569 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
570 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW,
571 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", "");
572 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
573 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW,
574 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", "");
575 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
576 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0,
577 "sleep delay in seconds");
578 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
579 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode");
580 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
581 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode");
582 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
583 OID_AUTO, "disable_on_reboot", CTLFLAG_RW,
584 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system");
585 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
586 OID_AUTO, "handle_reboot", CTLFLAG_RW,
587 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot");
588
589 /*
590 * Default to 1 second before sleeping to give some machines time to
591 * stabilize.
592 */
593 sc->acpi_sleep_delay = 1;
594 if (bootverbose)
595 sc->acpi_verbose = 1;
596 if ((env = getenv("hw.acpi.verbose")) != NULL) {
597 if (strcmp(env, "") != 0)
598 sc->acpi_verbose = 1;
599 freeenv(env);
600 }
601
602 /* Only enable reboot by default if the FADT says it is available. */
603 if (AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER)
604 sc->acpi_handle_reboot = 1;
605
606 /* Only enable S4BIOS by default if the FACS says it is available. */
607 if (AcpiGbl_FACS->Flags & ACPI_FACS_S4_BIOS_PRESENT)
608 sc->acpi_s4bios = 1;
609
610 /* Probe all supported sleep states. */
611 acpi_sleep_states[ACPI_STATE_S0] = TRUE;
612 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++)
613 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB)))
614 acpi_sleep_states[state] = TRUE;
615
616 /*
617 * Dispatch the default sleep state to devices. The lid switch is set
618 * to UNKNOWN by default to avoid surprising users.
619 */
620 sc->acpi_power_button_sx = acpi_sleep_states[ACPI_STATE_S5] ?
621 ACPI_STATE_S5 : ACPI_STATE_UNKNOWN;
622 sc->acpi_lid_switch_sx = ACPI_STATE_UNKNOWN;
623 sc->acpi_standby_sx = acpi_sleep_states[ACPI_STATE_S1] ?
624 ACPI_STATE_S1 : ACPI_STATE_UNKNOWN;
625 sc->acpi_suspend_sx = acpi_sleep_states[ACPI_STATE_S3] ?
626 ACPI_STATE_S3 : ACPI_STATE_UNKNOWN;
627
628 /* Pick the first valid sleep state for the sleep button default. */
629 sc->acpi_sleep_button_sx = ACPI_STATE_UNKNOWN;
630 for (state = ACPI_STATE_S1; state <= ACPI_STATE_S4; state++)
631 if (acpi_sleep_states[state]) {
632 sc->acpi_sleep_button_sx = state;
633 break;
634 }
635
636 acpi_enable_fixed_events(sc);
637
638 /*
639 * Scan the namespace and attach/initialise children.
640 */
641
642 /* Register our shutdown handler. */
643 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc,
644 SHUTDOWN_PRI_LAST);
645
646 /*
647 * Register our acpi event handlers.
648 * XXX should be configurable eg. via userland policy manager.
649 */
650 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep,
651 sc, ACPI_EVENT_PRI_LAST);
652 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup,
653 sc, ACPI_EVENT_PRI_LAST);
654
655 /* Flag our initial states. */
656 sc->acpi_enabled = TRUE;
657 sc->acpi_sstate = ACPI_STATE_S0;
658 sc->acpi_sleep_disabled = TRUE;
659
660 /* Create the control device */
661 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644,
662 "acpi");
663 sc->acpi_dev_t->si_drv1 = sc;
664
665 if ((error = acpi_machdep_init(dev)))
666 goto out;
667
668 /* Register ACPI again to pass the correct argument of pm_func. */
669 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc);
670
671 if (!acpi_disabled("bus"))
672 acpi_probe_children(dev);
673
674 /* Update all GPEs and enable runtime GPEs. */
675 status = AcpiUpdateAllGpes();
676 if (ACPI_FAILURE(status))
677 device_printf(dev, "Could not update all GPEs: %s\n",
678 AcpiFormatException(status));
679
680 /* Allow sleep request after a while. */
681 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME);
682
683 error = 0;
684
685 out:
686 return_VALUE (error);
687 }
688
689 static void
690 acpi_set_power_children(device_t dev, int state)
691 {
692 device_t child, parent;
693 device_t *devlist;
694 struct pci_devinfo *dinfo;
695 int dstate, i, numdevs;
696
697 if (device_get_children(dev, &devlist, &numdevs) != 0)
698 return;
699
700 /*
701 * Retrieve and set D-state for the sleep state if _SxD is present.
702 * Skip children who aren't attached since they are handled separately.
703 */
704 parent = device_get_parent(dev);
705 for (i = 0; i < numdevs; i++) {
706 child = devlist[i];
707 dinfo = device_get_ivars(child);
708 dstate = state;
709 if (device_is_attached(child) &&
710 acpi_device_pwr_for_sleep(parent, dev, &dstate) == 0)
711 acpi_set_powerstate(child, dstate);
712 }
713 free(devlist, M_TEMP);
714 }
715
716 static int
717 acpi_suspend(device_t dev)
718 {
719 int error;
720
721 GIANT_REQUIRED;
722
723 error = bus_generic_suspend(dev);
724 if (error == 0)
725 acpi_set_power_children(dev, ACPI_STATE_D3);
726
727 return (error);
728 }
729
730 static int
731 acpi_resume(device_t dev)
732 {
733
734 GIANT_REQUIRED;
735
736 acpi_set_power_children(dev, ACPI_STATE_D0);
737
738 return (bus_generic_resume(dev));
739 }
740
741 static int
742 acpi_shutdown(device_t dev)
743 {
744
745 GIANT_REQUIRED;
746
747 /* Allow children to shutdown first. */
748 bus_generic_shutdown(dev);
749
750 /*
751 * Enable any GPEs that are able to power-on the system (i.e., RTC).
752 * Also, disable any that are not valid for this state (most).
753 */
754 acpi_wake_prep_walk(ACPI_STATE_S5);
755
756 return (0);
757 }
758
759 /*
760 * Handle a new device being added
761 */
762 static device_t
763 acpi_add_child(device_t bus, u_int order, const char *name, int unit)
764 {
765 struct acpi_device *ad;
766 device_t child;
767
768 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL)
769 return (NULL);
770
771 resource_list_init(&ad->ad_rl);
772
773 child = device_add_child_ordered(bus, order, name, unit);
774 if (child != NULL)
775 device_set_ivars(child, ad);
776 else
777 free(ad, M_ACPIDEV);
778 return (child);
779 }
780
781 static int
782 acpi_print_child(device_t bus, device_t child)
783 {
784 struct acpi_device *adev = device_get_ivars(child);
785 struct resource_list *rl = &adev->ad_rl;
786 int retval = 0;
787
788 retval += bus_print_child_header(bus, child);
789 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx");
790 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx");
791 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
792 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld");
793 if (device_get_flags(child))
794 retval += printf(" flags %#x", device_get_flags(child));
795 retval += bus_print_child_footer(bus, child);
796
797 return (retval);
798 }
799
800 /*
801 * If this device is an ACPI child but no one claimed it, attempt
802 * to power it off. We'll power it back up when a driver is added.
803 *
804 * XXX Disabled for now since many necessary devices (like fdc and
805 * ATA) don't claim the devices we created for them but still expect
806 * them to be powered up.
807 */
808 static void
809 acpi_probe_nomatch(device_t bus, device_t child)
810 {
811 #ifdef ACPI_ENABLE_POWERDOWN_NODRIVER
812 acpi_set_powerstate(child, ACPI_STATE_D3);
813 #endif
814 }
815
816 /*
817 * If a new driver has a chance to probe a child, first power it up.
818 *
819 * XXX Disabled for now (see acpi_probe_nomatch for details).
820 */
821 static void
822 acpi_driver_added(device_t dev, driver_t *driver)
823 {
824 device_t child, *devlist;
825 int i, numdevs;
826
827 DEVICE_IDENTIFY(driver, dev);
828 if (device_get_children(dev, &devlist, &numdevs))
829 return;
830 for (i = 0; i < numdevs; i++) {
831 child = devlist[i];
832 if (device_get_state(child) == DS_NOTPRESENT) {
833 #ifdef ACPI_ENABLE_POWERDOWN_NODRIVER
834 acpi_set_powerstate(child, ACPI_STATE_D0);
835 if (device_probe_and_attach(child) != 0)
836 acpi_set_powerstate(child, ACPI_STATE_D3);
837 #else
838 device_probe_and_attach(child);
839 #endif
840 }
841 }
842 free(devlist, M_TEMP);
843 }
844
845 /* Location hint for devctl(8) */
846 static int
847 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf,
848 size_t buflen)
849 {
850 struct acpi_device *dinfo = device_get_ivars(child);
851
852 if (dinfo->ad_handle)
853 snprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle));
854 else
855 snprintf(buf, buflen, "unknown");
856 return (0);
857 }
858
859 /* PnP information for devctl(8) */
860 static int
861 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf,
862 size_t buflen)
863 {
864 struct acpi_device *dinfo = device_get_ivars(child);
865 ACPI_DEVICE_INFO *adinfo;
866
867 if (ACPI_FAILURE(AcpiGetObjectInfo(dinfo->ad_handle, &adinfo))) {
868 snprintf(buf, buflen, "unknown");
869 return (0);
870 }
871
872 snprintf(buf, buflen, "_HID=%s _UID=%lu",
873 (adinfo->Valid & ACPI_VALID_HID) ?
874 adinfo->HardwareId.String : "none",
875 (adinfo->Valid & ACPI_VALID_UID) ?
876 strtoul(adinfo->UniqueId.String, NULL, 10) : 0UL);
877 AcpiOsFree(adinfo);
878
879 return (0);
880 }
881
882 /*
883 * Handle per-device ivars
884 */
885 static int
886 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
887 {
888 struct acpi_device *ad;
889
890 if ((ad = device_get_ivars(child)) == NULL) {
891 device_printf(child, "device has no ivars\n");
892 return (ENOENT);
893 }
894
895 /* ACPI and ISA compatibility ivars */
896 switch(index) {
897 case ACPI_IVAR_HANDLE:
898 *(ACPI_HANDLE *)result = ad->ad_handle;
899 break;
900 case ACPI_IVAR_PRIVATE:
901 *(void **)result = ad->ad_private;
902 break;
903 case ACPI_IVAR_FLAGS:
904 *(int *)result = ad->ad_flags;
905 break;
906 case ISA_IVAR_VENDORID:
907 case ISA_IVAR_SERIAL:
908 case ISA_IVAR_COMPATID:
909 *(int *)result = -1;
910 break;
911 case ISA_IVAR_LOGICALID:
912 *(int *)result = acpi_isa_get_logicalid(child);
913 break;
914 default:
915 return (ENOENT);
916 }
917
918 return (0);
919 }
920
921 static int
922 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value)
923 {
924 struct acpi_device *ad;
925
926 if ((ad = device_get_ivars(child)) == NULL) {
927 device_printf(child, "device has no ivars\n");
928 return (ENOENT);
929 }
930
931 switch(index) {
932 case ACPI_IVAR_HANDLE:
933 ad->ad_handle = (ACPI_HANDLE)value;
934 break;
935 case ACPI_IVAR_PRIVATE:
936 ad->ad_private = (void *)value;
937 break;
938 case ACPI_IVAR_FLAGS:
939 ad->ad_flags = (int)value;
940 break;
941 default:
942 panic("bad ivar write request (%d)", index);
943 return (ENOENT);
944 }
945
946 return (0);
947 }
948
949 /*
950 * Handle child resource allocation/removal
951 */
952 static struct resource_list *
953 acpi_get_rlist(device_t dev, device_t child)
954 {
955 struct acpi_device *ad;
956
957 ad = device_get_ivars(child);
958 return (&ad->ad_rl);
959 }
960
961 static int
962 acpi_match_resource_hint(device_t dev, int type, long value)
963 {
964 struct acpi_device *ad = device_get_ivars(dev);
965 struct resource_list *rl = &ad->ad_rl;
966 struct resource_list_entry *rle;
967
968 STAILQ_FOREACH(rle, rl, link) {
969 if (rle->type != type)
970 continue;
971 if (rle->start <= value && rle->end >= value)
972 return (1);
973 }
974 return (0);
975 }
976
977 /*
978 * Wire device unit numbers based on resource matches in hints.
979 */
980 static void
981 acpi_hint_device_unit(device_t acdev, device_t child, const char *name,
982 int *unitp)
983 {
984 const char *s;
985 long value;
986 int line, matches, unit;
987
988 /*
989 * Iterate over all the hints for the devices with the specified
990 * name to see if one's resources are a subset of this device.
991 */
992 line = 0;
993 for (;;) {
994 if (resource_find_dev(&line, name, &unit, "at", NULL) != 0)
995 break;
996
997 /* Must have an "at" for acpi or isa. */
998 resource_string_value(name, unit, "at", &s);
999 if (!(strcmp(s, "acpi0") == 0 || strcmp(s, "acpi") == 0 ||
1000 strcmp(s, "isa0") == 0 || strcmp(s, "isa") == 0))
1001 continue;
1002
1003 /*
1004 * Check for matching resources. We must have at least one match.
1005 * Since I/O and memory resources cannot be shared, if we get a
1006 * match on either of those, ignore any mismatches in IRQs or DRQs.
1007 *
1008 * XXX: We may want to revisit this to be more lenient and wire
1009 * as long as it gets one match.
1010 */
1011 matches = 0;
1012 if (resource_long_value(name, unit, "port", &value) == 0) {
1013 /*
1014 * Floppy drive controllers are notorious for having a
1015 * wide variety of resources not all of which include the
1016 * first port that is specified by the hint (typically
1017 * 0x3f0) (see the comment above fdc_isa_alloc_resources()
1018 * in fdc_isa.c). However, they do all seem to include
1019 * port + 2 (e.g. 0x3f2) so for a floppy device, look for
1020 * 'value + 2' in the port resources instead of the hint
1021 * value.
1022 */
1023 if (strcmp(name, "fdc") == 0)
1024 value += 2;
1025 if (acpi_match_resource_hint(child, SYS_RES_IOPORT, value))
1026 matches++;
1027 else
1028 continue;
1029 }
1030 if (resource_long_value(name, unit, "maddr", &value) == 0) {
1031 if (acpi_match_resource_hint(child, SYS_RES_MEMORY, value))
1032 matches++;
1033 else
1034 continue;
1035 }
1036 if (matches > 0)
1037 goto matched;
1038 if (resource_long_value(name, unit, "irq", &value) == 0) {
1039 if (acpi_match_resource_hint(child, SYS_RES_IRQ, value))
1040 matches++;
1041 else
1042 continue;
1043 }
1044 if (resource_long_value(name, unit, "drq", &value) == 0) {
1045 if (acpi_match_resource_hint(child, SYS_RES_DRQ, value))
1046 matches++;
1047 else
1048 continue;
1049 }
1050
1051 matched:
1052 if (matches > 0) {
1053 /* We have a winner! */
1054 *unitp = unit;
1055 break;
1056 }
1057 }
1058 }
1059
1060 /*
1061 * Pre-allocate/manage all memory and IO resources. Since rman can't handle
1062 * duplicates, we merge any in the sysresource attach routine.
1063 */
1064 static int
1065 acpi_sysres_alloc(device_t dev)
1066 {
1067 struct resource *res;
1068 struct resource_list *rl;
1069 struct resource_list_entry *rle;
1070 struct rman *rm;
1071 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL };
1072 device_t *children;
1073 int child_count, i;
1074
1075 /*
1076 * Probe/attach any sysresource devices. This would be unnecessary if we
1077 * had multi-pass probe/attach.
1078 */
1079 if (device_get_children(dev, &children, &child_count) != 0)
1080 return (ENXIO);
1081 for (i = 0; i < child_count; i++) {
1082 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL)
1083 device_probe_and_attach(children[i]);
1084 }
1085 free(children, M_TEMP);
1086
1087 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev);
1088 STAILQ_FOREACH(rle, rl, link) {
1089 if (rle->res != NULL) {
1090 device_printf(dev, "duplicate resource for %lx\n", rle->start);
1091 continue;
1092 }
1093
1094 /* Only memory and IO resources are valid here. */
1095 switch (rle->type) {
1096 case SYS_RES_IOPORT:
1097 rm = &acpi_rman_io;
1098 break;
1099 case SYS_RES_MEMORY:
1100 rm = &acpi_rman_mem;
1101 break;
1102 default:
1103 continue;
1104 }
1105
1106 /* Pre-allocate resource and add to our rman pool. */
1107 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type,
1108 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 0);
1109 if (res != NULL) {
1110 rman_manage_region(rm, rman_get_start(res), rman_get_end(res));
1111 rle->res = res;
1112 } else
1113 device_printf(dev, "reservation of %lx, %lx (%d) failed\n",
1114 rle->start, rle->count, rle->type);
1115 }
1116 return (0);
1117 }
1118
1119 static char *pcilink_ids[] = { "PNP0C0F", NULL };
1120 static char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL };
1121
1122 /*
1123 * Reserve declared resources for devices found during attach once system
1124 * resources have been allocated.
1125 */
1126 static void
1127 acpi_reserve_resources(device_t dev)
1128 {
1129 struct resource_list_entry *rle;
1130 struct resource_list *rl;
1131 struct acpi_device *ad;
1132 struct acpi_softc *sc;
1133 device_t *children;
1134 int child_count, i;
1135
1136 sc = device_get_softc(dev);
1137 if (device_get_children(dev, &children, &child_count) != 0)
1138 return;
1139 for (i = 0; i < child_count; i++) {
1140 ad = device_get_ivars(children[i]);
1141 rl = &ad->ad_rl;
1142
1143 /* Don't reserve system resources. */
1144 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL)
1145 continue;
1146
1147 STAILQ_FOREACH(rle, rl, link) {
1148 /*
1149 * Don't reserve IRQ resources. There are many sticky things
1150 * to get right otherwise (e.g. IRQs for psm, atkbd, and HPET
1151 * when using legacy routing).
1152 */
1153 if (rle->type == SYS_RES_IRQ)
1154 continue;
1155
1156 /*
1157 * Don't reserve the resource if it is already allocated.
1158 * The acpi_ec(4) driver can allocate its resources early
1159 * if ECDT is present.
1160 */
1161 if (rle->res != NULL)
1162 continue;
1163
1164 /*
1165 * Try to reserve the resource from our parent. If this
1166 * fails because the resource is a system resource, just
1167 * let it be. The resource range is already reserved so
1168 * that other devices will not use it. If the driver
1169 * needs to allocate the resource, then
1170 * acpi_alloc_resource() will sub-alloc from the system
1171 * resource.
1172 */
1173 resource_list_reserve(rl, dev, children[i], rle->type, &rle->rid,
1174 rle->start, rle->end, rle->count, 0);
1175 }
1176 }
1177 free(children, M_TEMP);
1178 sc->acpi_resources_reserved = 1;
1179 }
1180
1181 static int
1182 acpi_set_resource(device_t dev, device_t child, int type, int rid,
1183 u_long start, u_long count)
1184 {
1185 struct acpi_softc *sc = device_get_softc(dev);
1186 struct acpi_device *ad = device_get_ivars(child);
1187 struct resource_list *rl = &ad->ad_rl;
1188 u_long end;
1189
1190 /* Ignore IRQ resources for PCI link devices. */
1191 if (type == SYS_RES_IRQ && ACPI_ID_PROBE(dev, child, pcilink_ids) != NULL)
1192 return (0);
1193
1194 /* If the resource is already allocated, fail. */
1195 if (resource_list_busy(rl, type, rid))
1196 return (EBUSY);
1197
1198 /* If the resource is already reserved, release it. */
1199 if (resource_list_reserved(rl, type, rid))
1200 resource_list_unreserve(rl, dev, child, type, rid);
1201
1202 /* Add the resource. */
1203 end = (start + count - 1);
1204 resource_list_add(rl, type, rid, start, end, count);
1205
1206 /* Don't reserve resources until the system resources are allocated. */
1207 if (!sc->acpi_resources_reserved)
1208 return (0);
1209
1210 /* Don't reserve system resources. */
1211 if (ACPI_ID_PROBE(dev, child, sysres_ids) != NULL)
1212 return (0);
1213
1214 /*
1215 * Don't reserve IRQ resources. There are many sticky things to
1216 * get right otherwise (e.g. IRQs for psm, atkbd, and HPET when
1217 * using legacy routing).
1218 */
1219 if (type == SYS_RES_IRQ)
1220 return (0);
1221
1222 /*
1223 * Reserve the resource.
1224 *
1225 * XXX: Ignores failure for now. Failure here is probably a
1226 * BIOS/firmware bug?
1227 */
1228 resource_list_reserve(rl, dev, child, type, &rid, start, end, count, 0);
1229 return (0);
1230 }
1231
1232 static struct resource *
1233 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid,
1234 u_long start, u_long end, u_long count, u_int flags)
1235 {
1236 ACPI_RESOURCE ares;
1237 struct acpi_device *ad;
1238 struct resource_list_entry *rle;
1239 struct resource_list *rl;
1240 struct resource *res;
1241 int isdefault = (start == 0UL && end == ~0UL);
1242
1243 /*
1244 * First attempt at allocating the resource. For direct children,
1245 * use resource_list_alloc() to handle reserved resources. For
1246 * other devices, pass the request up to our parent.
1247 */
1248 if (bus == device_get_parent(child)) {
1249 ad = device_get_ivars(child);
1250 rl = &ad->ad_rl;
1251
1252 /*
1253 * Simulate the behavior of the ISA bus for direct children
1254 * devices. That is, if a non-default range is specified for
1255 * a resource that doesn't exist, use bus_set_resource() to
1256 * add the resource before allocating it. Note that these
1257 * resources will not be reserved.
1258 */
1259 if (!isdefault && resource_list_find(rl, type, *rid) == NULL)
1260 resource_list_add(rl, type, *rid, start, end, count);
1261 res = resource_list_alloc(rl, bus, child, type, rid, start, end, count,
1262 flags);
1263 if (res != NULL && type == SYS_RES_IRQ) {
1264 /*
1265 * Since bus_config_intr() takes immediate effect, we cannot
1266 * configure the interrupt associated with a device when we
1267 * parse the resources but have to defer it until a driver
1268 * actually allocates the interrupt via bus_alloc_resource().
1269 *
1270 * XXX: Should we handle the lookup failing?
1271 */
1272 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares)))
1273 acpi_config_intr(child, &ares);
1274 }
1275
1276 /*
1277 * If this is an allocation of the "default" range for a given
1278 * RID, fetch the exact bounds for this resource from the
1279 * resource list entry to try to allocate the range from the
1280 * system resource regions.
1281 */
1282 if (res == NULL && isdefault) {
1283 rle = resource_list_find(rl, type, *rid);
1284 if (rle != NULL) {
1285 start = rle->start;
1286 end = rle->end;
1287 count = rle->count;
1288 }
1289 }
1290 } else
1291 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid,
1292 start, end, count, flags);
1293
1294 /*
1295 * If the first attempt failed and this is an allocation of a
1296 * specific range, try to satisfy the request via a suballocation
1297 * from our system resource regions.
1298 */
1299 if (res == NULL && start + count - 1 == end)
1300 res = acpi_alloc_sysres(child, type, rid, start, end, count, flags);
1301 return (res);
1302 }
1303
1304 /*
1305 * Attempt to allocate a specific resource range from the system
1306 * resource ranges. Note that we only handle memory and I/O port
1307 * system resources.
1308 */
1309 struct resource *
1310 acpi_alloc_sysres(device_t child, int type, int *rid, u_long start, u_long end,
1311 u_long count, u_int flags)
1312 {
1313 struct rman *rm;
1314 struct resource *res;
1315
1316 switch (type) {
1317 case SYS_RES_IOPORT:
1318 rm = &acpi_rman_io;
1319 break;
1320 case SYS_RES_MEMORY:
1321 rm = &acpi_rman_mem;
1322 break;
1323 default:
1324 return (NULL);
1325 }
1326
1327 KASSERT(start + count - 1 == end, ("wildcard resource range"));
1328 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE,
1329 child);
1330 if (res == NULL)
1331 return (NULL);
1332
1333 rman_set_rid(res, *rid);
1334
1335 /* If requested, activate the resource using the parent's method. */
1336 if (flags & RF_ACTIVE)
1337 if (bus_activate_resource(child, type, *rid, res) != 0) {
1338 rman_release_resource(res);
1339 return (NULL);
1340 }
1341
1342 return (res);
1343 }
1344
1345 static int
1346 acpi_is_resource_managed(int type, struct resource *r)
1347 {
1348
1349 /* We only handle memory and IO resources through rman. */
1350 switch (type) {
1351 case SYS_RES_IOPORT:
1352 return (rman_is_region_manager(r, &acpi_rman_io));
1353 case SYS_RES_MEMORY:
1354 return (rman_is_region_manager(r, &acpi_rman_mem));
1355 }
1356 return (0);
1357 }
1358
1359 static int
1360 acpi_adjust_resource(device_t bus, device_t child, int type, struct resource *r,
1361 u_long start, u_long end)
1362 {
1363
1364 if (acpi_is_resource_managed(type, r))
1365 return (rman_adjust_resource(r, start, end));
1366 return (bus_generic_adjust_resource(bus, child, type, r, start, end));
1367 }
1368
1369 static int
1370 acpi_release_resource(device_t bus, device_t child, int type, int rid,
1371 struct resource *r)
1372 {
1373 int ret;
1374
1375 /*
1376 * If this resource belongs to one of our internal managers,
1377 * deactivate it and release it to the local pool.
1378 */
1379 if (acpi_is_resource_managed(type, r)) {
1380 if (rman_get_flags(r) & RF_ACTIVE) {
1381 ret = bus_deactivate_resource(child, type, rid, r);
1382 if (ret != 0)
1383 return (ret);
1384 }
1385 return (rman_release_resource(r));
1386 }
1387
1388 return (bus_generic_rl_release_resource(bus, child, type, rid, r));
1389 }
1390
1391 static void
1392 acpi_delete_resource(device_t bus, device_t child, int type, int rid)
1393 {
1394 struct resource_list *rl;
1395
1396 rl = acpi_get_rlist(bus, child);
1397 if (resource_list_busy(rl, type, rid)) {
1398 device_printf(bus, "delete_resource: Resource still owned by child"
1399 " (type=%d, rid=%d)\n", type, rid);
1400 return;
1401 }
1402 resource_list_unreserve(rl, bus, child, type, rid);
1403 resource_list_delete(rl, type, rid);
1404 }
1405
1406 /* Allocate an IO port or memory resource, given its GAS. */
1407 int
1408 acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas,
1409 struct resource **res, u_int flags)
1410 {
1411 int error, res_type;
1412
1413 error = ENOMEM;
1414 if (type == NULL || rid == NULL || gas == NULL || res == NULL)
1415 return (EINVAL);
1416
1417 /* We only support memory and IO spaces. */
1418 switch (gas->SpaceId) {
1419 case ACPI_ADR_SPACE_SYSTEM_MEMORY:
1420 res_type = SYS_RES_MEMORY;
1421 break;
1422 case ACPI_ADR_SPACE_SYSTEM_IO:
1423 res_type = SYS_RES_IOPORT;
1424 break;
1425 default:
1426 return (EOPNOTSUPP);
1427 }
1428
1429 /*
1430 * If the register width is less than 8, assume the BIOS author means
1431 * it is a bit field and just allocate a byte.
1432 */
1433 if (gas->BitWidth && gas->BitWidth < 8)
1434 gas->BitWidth = 8;
1435
1436 /* Validate the address after we're sure we support the space. */
1437 if (gas->Address == 0 || gas->BitWidth == 0)
1438 return (EINVAL);
1439
1440 bus_set_resource(dev, res_type, *rid, gas->Address,
1441 gas->BitWidth / 8);
1442 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags);
1443 if (*res != NULL) {
1444 *type = res_type;
1445 error = 0;
1446 } else
1447 bus_delete_resource(dev, res_type, *rid);
1448
1449 return (error);
1450 }
1451
1452 /* Probe _HID and _CID for compatible ISA PNP ids. */
1453 static uint32_t
1454 acpi_isa_get_logicalid(device_t dev)
1455 {
1456 ACPI_DEVICE_INFO *devinfo;
1457 ACPI_HANDLE h;
1458 uint32_t pnpid;
1459
1460 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1461
1462 /* Fetch and validate the HID. */
1463 if ((h = acpi_get_handle(dev)) == NULL ||
1464 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
1465 return_VALUE (0);
1466
1467 pnpid = (devinfo->Valid & ACPI_VALID_HID) != 0 &&
1468 devinfo->HardwareId.Length >= ACPI_EISAID_STRING_SIZE ?
1469 PNP_EISAID(devinfo->HardwareId.String) : 0;
1470 AcpiOsFree(devinfo);
1471
1472 return_VALUE (pnpid);
1473 }
1474
1475 static int
1476 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count)
1477 {
1478 ACPI_DEVICE_INFO *devinfo;
1479 ACPI_DEVICE_ID *ids;
1480 ACPI_HANDLE h;
1481 uint32_t *pnpid;
1482 int i, valid;
1483
1484 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1485
1486 pnpid = cids;
1487
1488 /* Fetch and validate the CID */
1489 if ((h = acpi_get_handle(dev)) == NULL ||
1490 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
1491 return_VALUE (0);
1492
1493 if ((devinfo->Valid & ACPI_VALID_CID) == 0) {
1494 AcpiOsFree(devinfo);
1495 return_VALUE (0);
1496 }
1497
1498 if (devinfo->CompatibleIdList.Count < count)
1499 count = devinfo->CompatibleIdList.Count;
1500 ids = devinfo->CompatibleIdList.Ids;
1501 for (i = 0, valid = 0; i < count; i++)
1502 if (ids[i].Length >= ACPI_EISAID_STRING_SIZE &&
1503 strncmp(ids[i].String, "PNP", 3) == 0) {
1504 *pnpid++ = PNP_EISAID(ids[i].String);
1505 valid++;
1506 }
1507 AcpiOsFree(devinfo);
1508
1509 return_VALUE (valid);
1510 }
1511
1512 static char *
1513 acpi_device_id_probe(device_t bus, device_t dev, char **ids)
1514 {
1515 ACPI_HANDLE h;
1516 ACPI_OBJECT_TYPE t;
1517 int i;
1518
1519 h = acpi_get_handle(dev);
1520 if (ids == NULL || h == NULL)
1521 return (NULL);
1522 t = acpi_get_type(dev);
1523 if (t != ACPI_TYPE_DEVICE && t != ACPI_TYPE_PROCESSOR)
1524 return (NULL);
1525
1526 /* Try to match one of the array of IDs with a HID or CID. */
1527 for (i = 0; ids[i] != NULL; i++) {
1528 if (acpi_MatchHid(h, ids[i]))
1529 return (ids[i]);
1530 }
1531 return (NULL);
1532 }
1533
1534 static ACPI_STATUS
1535 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname,
1536 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret)
1537 {
1538 ACPI_HANDLE h;
1539
1540 if (dev == NULL)
1541 h = ACPI_ROOT_OBJECT;
1542 else if ((h = acpi_get_handle(dev)) == NULL)
1543 return (AE_BAD_PARAMETER);
1544 return (AcpiEvaluateObject(h, pathname, parameters, ret));
1545 }
1546
1547 int
1548 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate)
1549 {
1550 struct acpi_softc *sc;
1551 ACPI_HANDLE handle;
1552 ACPI_STATUS status;
1553 char sxd[8];
1554
1555 handle = acpi_get_handle(dev);
1556
1557 /*
1558 * XXX If we find these devices, don't try to power them down.
1559 * The serial and IRDA ports on my T23 hang the system when
1560 * set to D3 and it appears that such legacy devices may
1561 * need special handling in their drivers.
1562 */
1563 if (dstate == NULL || handle == NULL ||
1564 acpi_MatchHid(handle, "PNP0500") ||
1565 acpi_MatchHid(handle, "PNP0501") ||
1566 acpi_MatchHid(handle, "PNP0502") ||
1567 acpi_MatchHid(handle, "PNP0510") ||
1568 acpi_MatchHid(handle, "PNP0511"))
1569 return (ENXIO);
1570
1571 /*
1572 * Override next state with the value from _SxD, if present.
1573 * Note illegal _S0D is evaluated because some systems expect this.
1574 */
1575 sc = device_get_softc(bus);
1576 snprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate);
1577 status = acpi_GetInteger(handle, sxd, dstate);
1578 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
1579 device_printf(dev, "failed to get %s on %s: %s\n", sxd,
1580 acpi_name(handle), AcpiFormatException(status));
1581 return (ENXIO);
1582 }
1583
1584 return (0);
1585 }
1586
1587 /* Callback arg for our implementation of walking the namespace. */
1588 struct acpi_device_scan_ctx {
1589 acpi_scan_cb_t user_fn;
1590 void *arg;
1591 ACPI_HANDLE parent;
1592 };
1593
1594 static ACPI_STATUS
1595 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval)
1596 {
1597 struct acpi_device_scan_ctx *ctx;
1598 device_t dev, old_dev;
1599 ACPI_STATUS status;
1600 ACPI_OBJECT_TYPE type;
1601
1602 /*
1603 * Skip this device if we think we'll have trouble with it or it is
1604 * the parent where the scan began.
1605 */
1606 ctx = (struct acpi_device_scan_ctx *)arg;
1607 if (acpi_avoid(h) || h == ctx->parent)
1608 return (AE_OK);
1609
1610 /* If this is not a valid device type (e.g., a method), skip it. */
1611 if (ACPI_FAILURE(AcpiGetType(h, &type)))
1612 return (AE_OK);
1613 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR &&
1614 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER)
1615 return (AE_OK);
1616
1617 /*
1618 * Call the user function with the current device. If it is unchanged
1619 * afterwards, return. Otherwise, we update the handle to the new dev.
1620 */
1621 old_dev = acpi_get_device(h);
1622 dev = old_dev;
1623 status = ctx->user_fn(h, &dev, level, ctx->arg);
1624 if (ACPI_FAILURE(status) || old_dev == dev)
1625 return (status);
1626
1627 /* Remove the old child and its connection to the handle. */
1628 if (old_dev != NULL) {
1629 device_delete_child(device_get_parent(old_dev), old_dev);
1630 AcpiDetachData(h, acpi_fake_objhandler);
1631 }
1632
1633 /* Recreate the handle association if the user created a device. */
1634 if (dev != NULL)
1635 AcpiAttachData(h, acpi_fake_objhandler, dev);
1636
1637 return (AE_OK);
1638 }
1639
1640 static ACPI_STATUS
1641 acpi_device_scan_children(device_t bus, device_t dev, int max_depth,
1642 acpi_scan_cb_t user_fn, void *arg)
1643 {
1644 ACPI_HANDLE h;
1645 struct acpi_device_scan_ctx ctx;
1646
1647 if (acpi_disabled("children"))
1648 return (AE_OK);
1649
1650 if (dev == NULL)
1651 h = ACPI_ROOT_OBJECT;
1652 else if ((h = acpi_get_handle(dev)) == NULL)
1653 return (AE_BAD_PARAMETER);
1654 ctx.user_fn = user_fn;
1655 ctx.arg = arg;
1656 ctx.parent = h;
1657 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth,
1658 acpi_device_scan_cb, NULL, &ctx, NULL));
1659 }
1660
1661 /*
1662 * Even though ACPI devices are not PCI, we use the PCI approach for setting
1663 * device power states since it's close enough to ACPI.
1664 */
1665 static int
1666 acpi_set_powerstate(device_t child, int state)
1667 {
1668 ACPI_HANDLE h;
1669 ACPI_STATUS status;
1670
1671 h = acpi_get_handle(child);
1672 if (state < ACPI_STATE_D0 || state > ACPI_D_STATES_MAX)
1673 return (EINVAL);
1674 if (h == NULL)
1675 return (0);
1676
1677 /* Ignore errors if the power methods aren't present. */
1678 status = acpi_pwr_switch_consumer(h, state);
1679 if (ACPI_SUCCESS(status)) {
1680 if (bootverbose)
1681 device_printf(child, "set ACPI power state D%d on %s\n",
1682 state, acpi_name(h));
1683 } else if (status != AE_NOT_FOUND)
1684 device_printf(child,
1685 "failed to set ACPI power state D%d on %s: %s\n", state,
1686 acpi_name(h), AcpiFormatException(status));
1687
1688 return (0);
1689 }
1690
1691 static int
1692 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids)
1693 {
1694 int result, cid_count, i;
1695 uint32_t lid, cids[8];
1696
1697 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1698
1699 /*
1700 * ISA-style drivers attached to ACPI may persist and
1701 * probe manually if we return ENOENT. We never want
1702 * that to happen, so don't ever return it.
1703 */
1704 result = ENXIO;
1705
1706 /* Scan the supplied IDs for a match */
1707 lid = acpi_isa_get_logicalid(child);
1708 cid_count = acpi_isa_get_compatid(child, cids, 8);
1709 while (ids && ids->ip_id) {
1710 if (lid == ids->ip_id) {
1711 result = 0;
1712 goto out;
1713 }
1714 for (i = 0; i < cid_count; i++) {
1715 if (cids[i] == ids->ip_id) {
1716 result = 0;
1717 goto out;
1718 }
1719 }
1720 ids++;
1721 }
1722
1723 out:
1724 if (result == 0 && ids->ip_desc)
1725 device_set_desc(child, ids->ip_desc);
1726
1727 return_VALUE (result);
1728 }
1729
1730 #if defined(__i386__) || defined(__amd64__)
1731 /*
1732 * Look for a MCFG table. If it is present, use the settings for
1733 * domain (segment) 0 to setup PCI config space access via the memory
1734 * map.
1735 */
1736 static void
1737 acpi_enable_pcie(void)
1738 {
1739 ACPI_TABLE_HEADER *hdr;
1740 ACPI_MCFG_ALLOCATION *alloc, *end;
1741 ACPI_STATUS status;
1742
1743 status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr);
1744 if (ACPI_FAILURE(status))
1745 return;
1746
1747 end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length);
1748 alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1);
1749 while (alloc < end) {
1750 if (alloc->PciSegment == 0) {
1751 pcie_cfgregopen(alloc->Address, alloc->StartBusNumber,
1752 alloc->EndBusNumber);
1753 return;
1754 }
1755 alloc++;
1756 }
1757 }
1758 #endif
1759
1760 /*
1761 * Scan all of the ACPI namespace and attach child devices.
1762 *
1763 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and
1764 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec.
1765 * However, in violation of the spec, some systems place their PCI link
1766 * devices in \, so we have to walk the whole namespace. We check the
1767 * type of namespace nodes, so this should be ok.
1768 */
1769 static void
1770 acpi_probe_children(device_t bus)
1771 {
1772
1773 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1774
1775 /*
1776 * Scan the namespace and insert placeholders for all the devices that
1777 * we find. We also probe/attach any early devices.
1778 *
1779 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because
1780 * we want to create nodes for all devices, not just those that are
1781 * currently present. (This assumes that we don't want to create/remove
1782 * devices as they appear, which might be smarter.)
1783 */
1784 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n"));
1785 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, acpi_probe_child,
1786 NULL, bus, NULL);
1787
1788 /* Pre-allocate resources for our rman from any sysresource devices. */
1789 acpi_sysres_alloc(bus);
1790
1791 /* Reserve resources already allocated to children. */
1792 acpi_reserve_resources(bus);
1793
1794 /* Create any static children by calling device identify methods. */
1795 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n"));
1796 bus_generic_probe(bus);
1797
1798 /* Probe/attach all children, created statically and from the namespace. */
1799 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "acpi bus_generic_attach\n"));
1800 bus_generic_attach(bus);
1801
1802 /* Attach wake sysctls. */
1803 acpi_wake_sysctl_walk(bus);
1804
1805 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n"));
1806 return_VOID;
1807 }
1808
1809 /*
1810 * Determine the probe order for a given device.
1811 */
1812 static void
1813 acpi_probe_order(ACPI_HANDLE handle, int *order)
1814 {
1815 ACPI_OBJECT_TYPE type;
1816
1817 /*
1818 * 1. CPUs
1819 * 2. I/O port and memory system resource holders
1820 * 3. Embedded controllers (to handle early accesses)
1821 * 4. PCI Link Devices
1822 */
1823 AcpiGetType(handle, &type);
1824 if (type == ACPI_TYPE_PROCESSOR)
1825 *order = 1;
1826 else if (acpi_MatchHid(handle, "PNP0C01") || acpi_MatchHid(handle, "PNP0C02"))
1827 *order = 2;
1828 else if (acpi_MatchHid(handle, "PNP0C09"))
1829 *order = 3;
1830 else if (acpi_MatchHid(handle, "PNP0C0F"))
1831 *order = 4;
1832 }
1833
1834 /*
1835 * Evaluate a child device and determine whether we might attach a device to
1836 * it.
1837 */
1838 static ACPI_STATUS
1839 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status)
1840 {
1841 struct acpi_prw_data prw;
1842 ACPI_OBJECT_TYPE type;
1843 ACPI_HANDLE h;
1844 device_t bus, child;
1845 char *handle_str;
1846 int order;
1847
1848 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1849
1850 if (acpi_disabled("children"))
1851 return_ACPI_STATUS (AE_OK);
1852
1853 /* Skip this device if we think we'll have trouble with it. */
1854 if (acpi_avoid(handle))
1855 return_ACPI_STATUS (AE_OK);
1856
1857 bus = (device_t)context;
1858 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) {
1859 handle_str = acpi_name(handle);
1860 switch (type) {
1861 case ACPI_TYPE_DEVICE:
1862 /*
1863 * Since we scan from \, be sure to skip system scope objects.
1864 * \_SB_ and \_TZ_ are defined in ACPICA as devices to work around
1865 * BIOS bugs. For example, \_SB_ is to allow \_SB_._INI to be run
1866 * during the intialization and \_TZ_ is to support Notify() on it.
1867 */
1868 if (strcmp(handle_str, "\\_SB_") == 0 ||
1869 strcmp(handle_str, "\\_TZ_") == 0)
1870 break;
1871 if (acpi_parse_prw(handle, &prw) == 0)
1872 AcpiSetupGpeForWake(handle, prw.gpe_handle, prw.gpe_bit);
1873
1874 /*
1875 * Ignore devices that do not have a _HID or _CID. They should
1876 * be discovered by other buses (e.g. the PCI bus driver).
1877 */
1878 if (!acpi_has_hid(handle))
1879 break;
1880 /* FALLTHROUGH */
1881 case ACPI_TYPE_PROCESSOR:
1882 case ACPI_TYPE_THERMAL:
1883 case ACPI_TYPE_POWER:
1884 /*
1885 * Create a placeholder device for this node. Sort the
1886 * placeholder so that the probe/attach passes will run
1887 * breadth-first. Orders less than ACPI_DEV_BASE_ORDER
1888 * are reserved for special objects (i.e., system
1889 * resources).
1890 */
1891 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str));
1892 order = level * 10 + 100;
1893 acpi_probe_order(handle, &order);
1894 child = BUS_ADD_CHILD(bus, order, NULL, -1);
1895 if (child == NULL)
1896 break;
1897
1898 /* Associate the handle with the device_t and vice versa. */
1899 acpi_set_handle(child, handle);
1900 AcpiAttachData(handle, acpi_fake_objhandler, child);
1901
1902 /*
1903 * Check that the device is present. If it's not present,
1904 * leave it disabled (so that we have a device_t attached to
1905 * the handle, but we don't probe it).
1906 *
1907 * XXX PCI link devices sometimes report "present" but not
1908 * "functional" (i.e. if disabled). Go ahead and probe them
1909 * anyway since we may enable them later.
1910 */
1911 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) {
1912 /* Never disable PCI link devices. */
1913 if (acpi_MatchHid(handle, "PNP0C0F"))
1914 break;
1915 /*
1916 * Docking stations should remain enabled since the system
1917 * may be undocked at boot.
1918 */
1919 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h)))
1920 break;
1921
1922 device_disable(child);
1923 break;
1924 }
1925
1926 /*
1927 * Get the device's resource settings and attach them.
1928 * Note that if the device has _PRS but no _CRS, we need
1929 * to decide when it's appropriate to try to configure the
1930 * device. Ignore the return value here; it's OK for the
1931 * device not to have any resources.
1932 */
1933 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL);
1934 break;
1935 }
1936 }
1937
1938 return_ACPI_STATUS (AE_OK);
1939 }
1940
1941 /*
1942 * AcpiAttachData() requires an object handler but never uses it. This is a
1943 * placeholder object handler so we can store a device_t in an ACPI_HANDLE.
1944 */
1945 void
1946 acpi_fake_objhandler(ACPI_HANDLE h, void *data)
1947 {
1948 }
1949
1950 static void
1951 acpi_shutdown_final(void *arg, int howto)
1952 {
1953 struct acpi_softc *sc = (struct acpi_softc *)arg;
1954 ACPI_STATUS status;
1955
1956 /*
1957 * XXX Shutdown code should only run on the BSP (cpuid 0).
1958 * Some chipsets do not power off the system correctly if called from
1959 * an AP.
1960 */
1961 if ((howto & RB_POWEROFF) != 0) {
1962 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5);
1963 if (ACPI_FAILURE(status)) {
1964 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n",
1965 AcpiFormatException(status));
1966 return;
1967 }
1968 device_printf(sc->acpi_dev, "Powering system off\n");
1969 ACPI_DISABLE_IRQS();
1970 status = AcpiEnterSleepState(ACPI_STATE_S5);
1971 if (ACPI_FAILURE(status))
1972 device_printf(sc->acpi_dev, "power-off failed - %s\n",
1973 AcpiFormatException(status));
1974 else {
1975 DELAY(1000000);
1976 device_printf(sc->acpi_dev, "power-off failed - timeout\n");
1977 }
1978 } else if ((howto & RB_HALT) == 0 && sc->acpi_handle_reboot) {
1979 /* Reboot using the reset register. */
1980 status = AcpiReset();
1981 if (ACPI_SUCCESS(status)) {
1982 DELAY(1000000);
1983 device_printf(sc->acpi_dev, "reset failed - timeout\n");
1984 } else if (status != AE_NOT_EXIST)
1985 device_printf(sc->acpi_dev, "reset failed - %s\n",
1986 AcpiFormatException(status));
1987 } else if (sc->acpi_do_disable && panicstr == NULL) {
1988 /*
1989 * Only disable ACPI if the user requested. On some systems, writing
1990 * the disable value to SMI_CMD hangs the system.
1991 */
1992 device_printf(sc->acpi_dev, "Shutting down\n");
1993 AcpiTerminate();
1994 }
1995 }
1996
1997 static void
1998 acpi_enable_fixed_events(struct acpi_softc *sc)
1999 {
2000 static int first_time = 1;
2001
2002 /* Enable and clear fixed events and install handlers. */
2003 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) {
2004 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON);
2005 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON,
2006 acpi_event_power_button_sleep, sc);
2007 if (first_time)
2008 device_printf(sc->acpi_dev, "Power Button (fixed)\n");
2009 }
2010 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) {
2011 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON);
2012 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON,
2013 acpi_event_sleep_button_sleep, sc);
2014 if (first_time)
2015 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n");
2016 }
2017
2018 first_time = 0;
2019 }
2020
2021 /*
2022 * Returns true if the device is actually present and should
2023 * be attached to. This requires the present, enabled, UI-visible
2024 * and diagnostics-passed bits to be set.
2025 */
2026 BOOLEAN
2027 acpi_DeviceIsPresent(device_t dev)
2028 {
2029 ACPI_DEVICE_INFO *devinfo;
2030 ACPI_HANDLE h;
2031 BOOLEAN present;
2032
2033 if ((h = acpi_get_handle(dev)) == NULL ||
2034 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
2035 return (FALSE);
2036
2037 /* If no _STA method, must be present */
2038 present = (devinfo->Valid & ACPI_VALID_STA) == 0 ||
2039 ACPI_DEVICE_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE;
2040
2041 AcpiOsFree(devinfo);
2042 return (present);
2043 }
2044
2045 /*
2046 * Returns true if the battery is actually present and inserted.
2047 */
2048 BOOLEAN
2049 acpi_BatteryIsPresent(device_t dev)
2050 {
2051 ACPI_DEVICE_INFO *devinfo;
2052 ACPI_HANDLE h;
2053 BOOLEAN present;
2054
2055 if ((h = acpi_get_handle(dev)) == NULL ||
2056 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
2057 return (FALSE);
2058
2059 /* If no _STA method, must be present */
2060 present = (devinfo->Valid & ACPI_VALID_STA) == 0 ||
2061 ACPI_BATTERY_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE;
2062
2063 AcpiOsFree(devinfo);
2064 return (present);
2065 }
2066
2067 /*
2068 * Returns true if a device has at least one valid device ID.
2069 */
2070 static BOOLEAN
2071 acpi_has_hid(ACPI_HANDLE h)
2072 {
2073 ACPI_DEVICE_INFO *devinfo;
2074 BOOLEAN ret;
2075
2076 if (h == NULL ||
2077 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
2078 return (FALSE);
2079
2080 ret = FALSE;
2081 if ((devinfo->Valid & ACPI_VALID_HID) != 0)
2082 ret = TRUE;
2083 else if ((devinfo->Valid & ACPI_VALID_CID) != 0)
2084 if (devinfo->CompatibleIdList.Count > 0)
2085 ret = TRUE;
2086
2087 AcpiOsFree(devinfo);
2088 return (ret);
2089 }
2090
2091 /*
2092 * Match a HID string against a handle
2093 */
2094 BOOLEAN
2095 acpi_MatchHid(ACPI_HANDLE h, const char *hid)
2096 {
2097 ACPI_DEVICE_INFO *devinfo;
2098 BOOLEAN ret;
2099 int i;
2100
2101 if (hid == NULL || h == NULL ||
2102 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
2103 return (FALSE);
2104
2105 ret = FALSE;
2106 if ((devinfo->Valid & ACPI_VALID_HID) != 0 &&
2107 strcmp(hid, devinfo->HardwareId.String) == 0)
2108 ret = TRUE;
2109 else if ((devinfo->Valid & ACPI_VALID_CID) != 0)
2110 for (i = 0; i < devinfo->CompatibleIdList.Count; i++) {
2111 if (strcmp(hid, devinfo->CompatibleIdList.Ids[i].String) == 0) {
2112 ret = TRUE;
2113 break;
2114 }
2115 }
2116
2117 AcpiOsFree(devinfo);
2118 return (ret);
2119 }
2120
2121 /*
2122 * Return the handle of a named object within our scope, ie. that of (parent)
2123 * or one if its parents.
2124 */
2125 ACPI_STATUS
2126 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result)
2127 {
2128 ACPI_HANDLE r;
2129 ACPI_STATUS status;
2130
2131 /* Walk back up the tree to the root */
2132 for (;;) {
2133 status = AcpiGetHandle(parent, path, &r);
2134 if (ACPI_SUCCESS(status)) {
2135 *result = r;
2136 return (AE_OK);
2137 }
2138 /* XXX Return error here? */
2139 if (status != AE_NOT_FOUND)
2140 return (AE_OK);
2141 if (ACPI_FAILURE(AcpiGetParent(parent, &r)))
2142 return (AE_NOT_FOUND);
2143 parent = r;
2144 }
2145 }
2146
2147 /*
2148 * Allocate a buffer with a preset data size.
2149 */
2150 ACPI_BUFFER *
2151 acpi_AllocBuffer(int size)
2152 {
2153 ACPI_BUFFER *buf;
2154
2155 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL)
2156 return (NULL);
2157 buf->Length = size;
2158 buf->Pointer = (void *)(buf + 1);
2159 return (buf);
2160 }
2161
2162 ACPI_STATUS
2163 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number)
2164 {
2165 ACPI_OBJECT arg1;
2166 ACPI_OBJECT_LIST args;
2167
2168 arg1.Type = ACPI_TYPE_INTEGER;
2169 arg1.Integer.Value = number;
2170 args.Count = 1;
2171 args.Pointer = &arg1;
2172
2173 return (AcpiEvaluateObject(handle, path, &args, NULL));
2174 }
2175
2176 /*
2177 * Evaluate a path that should return an integer.
2178 */
2179 ACPI_STATUS
2180 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number)
2181 {
2182 ACPI_STATUS status;
2183 ACPI_BUFFER buf;
2184 ACPI_OBJECT param;
2185
2186 if (handle == NULL)
2187 handle = ACPI_ROOT_OBJECT;
2188
2189 /*
2190 * Assume that what we've been pointed at is an Integer object, or
2191 * a method that will return an Integer.
2192 */
2193 buf.Pointer = ¶m;
2194 buf.Length = sizeof(param);
2195 status = AcpiEvaluateObject(handle, path, NULL, &buf);
2196 if (ACPI_SUCCESS(status)) {
2197 if (param.Type == ACPI_TYPE_INTEGER)
2198 *number = param.Integer.Value;
2199 else
2200 status = AE_TYPE;
2201 }
2202
2203 /*
2204 * In some applications, a method that's expected to return an Integer
2205 * may instead return a Buffer (probably to simplify some internal
2206 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer,
2207 * convert it into an Integer as best we can.
2208 *
2209 * This is a hack.
2210 */
2211 if (status == AE_BUFFER_OVERFLOW) {
2212 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) {
2213 status = AE_NO_MEMORY;
2214 } else {
2215 status = AcpiEvaluateObject(handle, path, NULL, &buf);
2216 if (ACPI_SUCCESS(status))
2217 status = acpi_ConvertBufferToInteger(&buf, number);
2218 AcpiOsFree(buf.Pointer);
2219 }
2220 }
2221 return (status);
2222 }
2223
2224 ACPI_STATUS
2225 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number)
2226 {
2227 ACPI_OBJECT *p;
2228 UINT8 *val;
2229 int i;
2230
2231 p = (ACPI_OBJECT *)bufp->Pointer;
2232 if (p->Type == ACPI_TYPE_INTEGER) {
2233 *number = p->Integer.Value;
2234 return (AE_OK);
2235 }
2236 if (p->Type != ACPI_TYPE_BUFFER)
2237 return (AE_TYPE);
2238 if (p->Buffer.Length > sizeof(int))
2239 return (AE_BAD_DATA);
2240
2241 *number = 0;
2242 val = p->Buffer.Pointer;
2243 for (i = 0; i < p->Buffer.Length; i++)
2244 *number += val[i] << (i * 8);
2245 return (AE_OK);
2246 }
2247
2248 /*
2249 * Iterate over the elements of an a package object, calling the supplied
2250 * function for each element.
2251 *
2252 * XXX possible enhancement might be to abort traversal on error.
2253 */
2254 ACPI_STATUS
2255 acpi_ForeachPackageObject(ACPI_OBJECT *pkg,
2256 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg)
2257 {
2258 ACPI_OBJECT *comp;
2259 int i;
2260
2261 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE)
2262 return (AE_BAD_PARAMETER);
2263
2264 /* Iterate over components */
2265 i = 0;
2266 comp = pkg->Package.Elements;
2267 for (; i < pkg->Package.Count; i++, comp++)
2268 func(comp, arg);
2269
2270 return (AE_OK);
2271 }
2272
2273 /*
2274 * Find the (index)th resource object in a set.
2275 */
2276 ACPI_STATUS
2277 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp)
2278 {
2279 ACPI_RESOURCE *rp;
2280 int i;
2281
2282 rp = (ACPI_RESOURCE *)buf->Pointer;
2283 i = index;
2284 while (i-- > 0) {
2285 /* Range check */
2286 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length))
2287 return (AE_BAD_PARAMETER);
2288
2289 /* Check for terminator */
2290 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0)
2291 return (AE_NOT_FOUND);
2292 rp = ACPI_NEXT_RESOURCE(rp);
2293 }
2294 if (resp != NULL)
2295 *resp = rp;
2296
2297 return (AE_OK);
2298 }
2299
2300 /*
2301 * Append an ACPI_RESOURCE to an ACPI_BUFFER.
2302 *
2303 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER
2304 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible
2305 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of
2306 * resources.
2307 */
2308 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512
2309
2310 ACPI_STATUS
2311 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res)
2312 {
2313 ACPI_RESOURCE *rp;
2314 void *newp;
2315
2316 /* Initialise the buffer if necessary. */
2317 if (buf->Pointer == NULL) {
2318 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE;
2319 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL)
2320 return (AE_NO_MEMORY);
2321 rp = (ACPI_RESOURCE *)buf->Pointer;
2322 rp->Type = ACPI_RESOURCE_TYPE_END_TAG;
2323 rp->Length = 0;
2324 }
2325 if (res == NULL)
2326 return (AE_OK);
2327
2328 /*
2329 * Scan the current buffer looking for the terminator.
2330 * This will either find the terminator or hit the end
2331 * of the buffer and return an error.
2332 */
2333 rp = (ACPI_RESOURCE *)buf->Pointer;
2334 for (;;) {
2335 /* Range check, don't go outside the buffer */
2336 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length))
2337 return (AE_BAD_PARAMETER);
2338 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0)
2339 break;
2340 rp = ACPI_NEXT_RESOURCE(rp);
2341 }
2342
2343 /*
2344 * Check the size of the buffer and expand if required.
2345 *
2346 * Required size is:
2347 * size of existing resources before terminator +
2348 * size of new resource and header +
2349 * size of terminator.
2350 *
2351 * Note that this loop should really only run once, unless
2352 * for some reason we are stuffing a *really* huge resource.
2353 */
2354 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) +
2355 res->Length + ACPI_RS_SIZE_NO_DATA +
2356 ACPI_RS_SIZE_MIN) >= buf->Length) {
2357 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL)
2358 return (AE_NO_MEMORY);
2359 bcopy(buf->Pointer, newp, buf->Length);
2360 rp = (ACPI_RESOURCE *)((u_int8_t *)newp +
2361 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer));
2362 AcpiOsFree(buf->Pointer);
2363 buf->Pointer = newp;
2364 buf->Length += buf->Length;
2365 }
2366
2367 /* Insert the new resource. */
2368 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA);
2369
2370 /* And add the terminator. */
2371 rp = ACPI_NEXT_RESOURCE(rp);
2372 rp->Type = ACPI_RESOURCE_TYPE_END_TAG;
2373 rp->Length = 0;
2374
2375 return (AE_OK);
2376 }
2377
2378 /*
2379 * Set interrupt model.
2380 */
2381 ACPI_STATUS
2382 acpi_SetIntrModel(int model)
2383 {
2384
2385 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model));
2386 }
2387
2388 /*
2389 * Walk subtables of a table and call a callback routine for each
2390 * subtable. The caller should provide the first subtable and a
2391 * pointer to the end of the table. This can be used to walk tables
2392 * such as MADT and SRAT that use subtable entries.
2393 */
2394 void
2395 acpi_walk_subtables(void *first, void *end, acpi_subtable_handler *handler,
2396 void *arg)
2397 {
2398 ACPI_SUBTABLE_HEADER *entry;
2399
2400 for (entry = first; (void *)entry < end; ) {
2401 /* Avoid an infinite loop if we hit a bogus entry. */
2402 if (entry->Length < sizeof(ACPI_SUBTABLE_HEADER))
2403 return;
2404
2405 handler(entry, arg);
2406 entry = ACPI_ADD_PTR(ACPI_SUBTABLE_HEADER, entry, entry->Length);
2407 }
2408 }
2409
2410 /*
2411 * DEPRECATED. This interface has serious deficiencies and will be
2412 * removed.
2413 *
2414 * Immediately enter the sleep state. In the old model, acpiconf(8) ran
2415 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this.
2416 */
2417 ACPI_STATUS
2418 acpi_SetSleepState(struct acpi_softc *sc, int state)
2419 {
2420 static int once;
2421
2422 if (!once) {
2423 device_printf(sc->acpi_dev,
2424 "warning: acpi_SetSleepState() deprecated, need to update your software\n");
2425 once = 1;
2426 }
2427 return (acpi_EnterSleepState(sc, state));
2428 }
2429
2430 #if defined(__amd64__) || defined(__i386__)
2431 static void
2432 acpi_sleep_force(void *arg)
2433 {
2434 struct acpi_softc *sc = (struct acpi_softc *)arg;
2435
2436 device_printf(sc->acpi_dev,
2437 "suspend request timed out, forcing sleep now\n");
2438 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate)))
2439 device_printf(sc->acpi_dev, "force sleep state S%d failed\n",
2440 sc->acpi_next_sstate);
2441 }
2442 #endif
2443
2444 /*
2445 * Request that the system enter the given suspend state. All /dev/apm
2446 * devices and devd(8) will be notified. Userland then has a chance to
2447 * save state and acknowledge the request. The system sleeps once all
2448 * acks are in.
2449 */
2450 int
2451 acpi_ReqSleepState(struct acpi_softc *sc, int state)
2452 {
2453 #if defined(__amd64__) || defined(__i386__)
2454 struct apm_clone_data *clone;
2455 ACPI_STATUS status;
2456
2457 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX)
2458 return (EINVAL);
2459 if (!acpi_sleep_states[state])
2460 return (EOPNOTSUPP);
2461
2462 ACPI_LOCK(acpi);
2463
2464 /* If a suspend request is already in progress, just return. */
2465 if (sc->acpi_next_sstate != 0) {
2466 ACPI_UNLOCK(acpi);
2467 return (0);
2468 }
2469
2470 /* S5 (soft-off) should be entered directly with no waiting. */
2471 if (state == ACPI_STATE_S5) {
2472 ACPI_UNLOCK(acpi);
2473 status = acpi_EnterSleepState(sc, state);
2474 return (ACPI_SUCCESS(status) ? 0 : ENXIO);
2475 }
2476
2477 /* Record the pending state and notify all apm devices. */
2478 sc->acpi_next_sstate = state;
2479 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) {
2480 clone->notify_status = APM_EV_NONE;
2481 if ((clone->flags & ACPI_EVF_DEVD) == 0) {
2482 selwakeuppri(&clone->sel_read, PZERO);
2483 KNOTE_LOCKED(&clone->sel_read.si_note, 0);
2484 }
2485 }
2486
2487 /* If devd(8) is not running, immediately enter the sleep state. */
2488 if (!devctl_process_running()) {
2489 ACPI_UNLOCK(acpi);
2490 status = acpi_EnterSleepState(sc, state);
2491 return (ACPI_SUCCESS(status) ? 0 : ENXIO);
2492 }
2493
2494 /*
2495 * Set a timeout to fire if userland doesn't ack the suspend request
2496 * in time. This way we still eventually go to sleep if we were
2497 * overheating or running low on battery, even if userland is hung.
2498 * We cancel this timeout once all userland acks are in or the
2499 * suspend request is aborted.
2500 */
2501 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc);
2502 ACPI_UNLOCK(acpi);
2503
2504 /* Now notify devd(8) also. */
2505 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state);
2506
2507 return (0);
2508 #else
2509 /* This platform does not support acpi suspend/resume. */
2510 return (EOPNOTSUPP);
2511 #endif
2512 }
2513
2514 /*
2515 * Acknowledge (or reject) a pending sleep state. The caller has
2516 * prepared for suspend and is now ready for it to proceed. If the
2517 * error argument is non-zero, it indicates suspend should be cancelled
2518 * and gives an errno value describing why. Once all votes are in,
2519 * we suspend the system.
2520 */
2521 int
2522 acpi_AckSleepState(struct apm_clone_data *clone, int error)
2523 {
2524 #if defined(__amd64__) || defined(__i386__)
2525 struct acpi_softc *sc;
2526 int ret, sleeping;
2527
2528 /* If no pending sleep state, return an error. */
2529 ACPI_LOCK(acpi);
2530 sc = clone->acpi_sc;
2531 if (sc->acpi_next_sstate == 0) {
2532 ACPI_UNLOCK(acpi);
2533 return (ENXIO);
2534 }
2535
2536 /* Caller wants to abort suspend process. */
2537 if (error) {
2538 sc->acpi_next_sstate = 0;
2539 callout_stop(&sc->susp_force_to);
2540 device_printf(sc->acpi_dev,
2541 "listener on %s cancelled the pending suspend\n",
2542 devtoname(clone->cdev));
2543 ACPI_UNLOCK(acpi);
2544 return (0);
2545 }
2546
2547 /*
2548 * Mark this device as acking the suspend request. Then, walk through
2549 * all devices, seeing if they agree yet. We only count devices that
2550 * are writable since read-only devices couldn't ack the request.
2551 */
2552 sleeping = TRUE;
2553 clone->notify_status = APM_EV_ACKED;
2554 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) {
2555 if ((clone->flags & ACPI_EVF_WRITE) != 0 &&
2556 clone->notify_status != APM_EV_ACKED) {
2557 sleeping = FALSE;
2558 break;
2559 }
2560 }
2561
2562 /* If all devices have voted "yes", we will suspend now. */
2563 if (sleeping)
2564 callout_stop(&sc->susp_force_to);
2565 ACPI_UNLOCK(acpi);
2566 ret = 0;
2567 if (sleeping) {
2568 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate)))
2569 ret = ENODEV;
2570 }
2571 return (ret);
2572 #else
2573 /* This platform does not support acpi suspend/resume. */
2574 return (EOPNOTSUPP);
2575 #endif
2576 }
2577
2578 static void
2579 acpi_sleep_enable(void *arg)
2580 {
2581 struct acpi_softc *sc = (struct acpi_softc *)arg;
2582
2583 /* Reschedule if the system is not fully up and running. */
2584 if (!AcpiGbl_SystemAwakeAndRunning) {
2585 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME);
2586 return;
2587 }
2588
2589 ACPI_LOCK(acpi);
2590 sc->acpi_sleep_disabled = FALSE;
2591 ACPI_UNLOCK(acpi);
2592 }
2593
2594 static ACPI_STATUS
2595 acpi_sleep_disable(struct acpi_softc *sc)
2596 {
2597 ACPI_STATUS status;
2598
2599 /* Fail if the system is not fully up and running. */
2600 if (!AcpiGbl_SystemAwakeAndRunning)
2601 return (AE_ERROR);
2602
2603 ACPI_LOCK(acpi);
2604 status = sc->acpi_sleep_disabled ? AE_ERROR : AE_OK;
2605 sc->acpi_sleep_disabled = TRUE;
2606 ACPI_UNLOCK(acpi);
2607
2608 return (status);
2609 }
2610
2611 enum acpi_sleep_state {
2612 ACPI_SS_NONE,
2613 ACPI_SS_GPE_SET,
2614 ACPI_SS_DEV_SUSPEND,
2615 ACPI_SS_SLP_PREP,
2616 ACPI_SS_SLEPT,
2617 };
2618
2619 /*
2620 * Enter the desired system sleep state.
2621 *
2622 * Currently we support S1-S5 but S4 is only S4BIOS
2623 */
2624 static ACPI_STATUS
2625 acpi_EnterSleepState(struct acpi_softc *sc, int state)
2626 {
2627 ACPI_STATUS status;
2628 enum acpi_sleep_state slp_state;
2629
2630 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
2631
2632 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX)
2633 return_ACPI_STATUS (AE_BAD_PARAMETER);
2634 if (!acpi_sleep_states[state]) {
2635 device_printf(sc->acpi_dev, "Sleep state S%d not supported by BIOS\n",
2636 state);
2637 return (AE_SUPPORT);
2638 }
2639
2640 /* Re-entry once we're suspending is not allowed. */
2641 status = acpi_sleep_disable(sc);
2642 if (ACPI_FAILURE(status)) {
2643 device_printf(sc->acpi_dev,
2644 "suspend request ignored (not ready yet)\n");
2645 return (status);
2646 }
2647
2648 if (state == ACPI_STATE_S5) {
2649 /*
2650 * Shut down cleanly and power off. This will call us back through the
2651 * shutdown handlers.
2652 */
2653 shutdown_nice(RB_POWEROFF);
2654 return_ACPI_STATUS (AE_OK);
2655 }
2656
2657 EVENTHANDLER_INVOKE(power_suspend);
2658
2659 if (smp_started) {
2660 thread_lock(curthread);
2661 sched_bind(curthread, 0);
2662 thread_unlock(curthread);
2663 }
2664
2665 /*
2666 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE
2667 * drivers need this.
2668 */
2669 mtx_lock(&Giant);
2670
2671 slp_state = ACPI_SS_NONE;
2672
2673 sc->acpi_sstate = state;
2674
2675 /* Enable any GPEs as appropriate and requested by the user. */
2676 acpi_wake_prep_walk(state);
2677 slp_state = ACPI_SS_GPE_SET;
2678
2679 /*
2680 * Inform all devices that we are going to sleep. If at least one
2681 * device fails, DEVICE_SUSPEND() automatically resumes the tree.
2682 *
2683 * XXX Note that a better two-pass approach with a 'veto' pass
2684 * followed by a "real thing" pass would be better, but the current
2685 * bus interface does not provide for this.
2686 */
2687 if (DEVICE_SUSPEND(root_bus) != 0) {
2688 device_printf(sc->acpi_dev, "device_suspend failed\n");
2689 goto backout;
2690 }
2691 slp_state = ACPI_SS_DEV_SUSPEND;
2692
2693 /* If testing device suspend only, back out of everything here. */
2694 if (acpi_susp_bounce)
2695 goto backout;
2696
2697 status = AcpiEnterSleepStatePrep(state);
2698 if (ACPI_FAILURE(status)) {
2699 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n",
2700 AcpiFormatException(status));
2701 goto backout;
2702 }
2703 slp_state = ACPI_SS_SLP_PREP;
2704
2705 if (sc->acpi_sleep_delay > 0)
2706 DELAY(sc->acpi_sleep_delay * 1000000);
2707
2708 if (state != ACPI_STATE_S1) {
2709 acpi_sleep_machdep(sc, state);
2710
2711 /* Re-enable ACPI hardware on wakeup from sleep state 4. */
2712 if (state == ACPI_STATE_S4)
2713 AcpiEnable();
2714 } else {
2715 ACPI_DISABLE_IRQS();
2716 status = AcpiEnterSleepState(state);
2717 if (ACPI_FAILURE(status)) {
2718 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n",
2719 AcpiFormatException(status));
2720 goto backout;
2721 }
2722 }
2723 slp_state = ACPI_SS_SLEPT;
2724
2725 /*
2726 * Back out state according to how far along we got in the suspend
2727 * process. This handles both the error and success cases.
2728 */
2729 backout:
2730 if (slp_state >= ACPI_SS_GPE_SET) {
2731 acpi_wake_prep_walk(state);
2732 sc->acpi_sstate = ACPI_STATE_S0;
2733 }
2734 if (slp_state >= ACPI_SS_SLP_PREP)
2735 AcpiLeaveSleepState(state);
2736 if (slp_state >= ACPI_SS_DEV_SUSPEND)
2737 DEVICE_RESUME(root_bus);
2738 if (slp_state >= ACPI_SS_SLEPT)
2739 acpi_enable_fixed_events(sc);
2740 sc->acpi_next_sstate = 0;
2741
2742 mtx_unlock(&Giant);
2743
2744 if (smp_started) {
2745 thread_lock(curthread);
2746 sched_unbind(curthread);
2747 thread_unlock(curthread);
2748 }
2749
2750 EVENTHANDLER_INVOKE(power_resume);
2751
2752 /* Allow another sleep request after a while. */
2753 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME);
2754
2755 /* Run /etc/rc.resume after we are back. */
2756 if (devctl_process_running())
2757 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state);
2758
2759 return_ACPI_STATUS (status);
2760 }
2761
2762 void
2763 acpi_resync_clock(struct acpi_softc *sc)
2764 {
2765
2766 if (!acpi_reset_clock)
2767 return;
2768
2769 /*
2770 * Warm up timecounter again and reset system clock.
2771 */
2772 (void)timecounter->tc_get_timecount(timecounter);
2773 (void)timecounter->tc_get_timecount(timecounter);
2774 inittodr(time_second + sc->acpi_sleep_delay);
2775 }
2776
2777 /* Enable or disable the device's wake GPE. */
2778 int
2779 acpi_wake_set_enable(device_t dev, int enable)
2780 {
2781 struct acpi_prw_data prw;
2782 ACPI_STATUS status;
2783 int flags;
2784
2785 /* Make sure the device supports waking the system and get the GPE. */
2786 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0)
2787 return (ENXIO);
2788
2789 flags = acpi_get_flags(dev);
2790 if (enable) {
2791 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit,
2792 ACPI_GPE_ENABLE);
2793 if (ACPI_FAILURE(status)) {
2794 device_printf(dev, "enable wake failed\n");
2795 return (ENXIO);
2796 }
2797 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED);
2798 } else {
2799 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit,
2800 ACPI_GPE_DISABLE);
2801 if (ACPI_FAILURE(status)) {
2802 device_printf(dev, "disable wake failed\n");
2803 return (ENXIO);
2804 }
2805 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED);
2806 }
2807
2808 return (0);
2809 }
2810
2811 static int
2812 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate)
2813 {
2814 struct acpi_prw_data prw;
2815 device_t dev;
2816
2817 /* Check that this is a wake-capable device and get its GPE. */
2818 if (acpi_parse_prw(handle, &prw) != 0)
2819 return (ENXIO);
2820 dev = acpi_get_device(handle);
2821
2822 /*
2823 * The destination sleep state must be less than (i.e., higher power)
2824 * or equal to the value specified by _PRW. If this GPE cannot be
2825 * enabled for the next sleep state, then disable it. If it can and
2826 * the user requested it be enabled, turn on any required power resources
2827 * and set _PSW.
2828 */
2829 if (sstate > prw.lowest_wake) {
2830 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_DISABLE);
2831 if (bootverbose)
2832 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n",
2833 acpi_name(handle), sstate);
2834 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) {
2835 acpi_pwr_wake_enable(handle, 1);
2836 acpi_SetInteger(handle, "_PSW", 1);
2837 if (bootverbose)
2838 device_printf(dev, "wake_prep enabled for %s (S%d)\n",
2839 acpi_name(handle), sstate);
2840 }
2841
2842 return (0);
2843 }
2844
2845 static int
2846 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate)
2847 {
2848 struct acpi_prw_data prw;
2849 device_t dev;
2850
2851 /*
2852 * Check that this is a wake-capable device and get its GPE. Return
2853 * now if the user didn't enable this device for wake.
2854 */
2855 if (acpi_parse_prw(handle, &prw) != 0)
2856 return (ENXIO);
2857 dev = acpi_get_device(handle);
2858 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0)
2859 return (0);
2860
2861 /*
2862 * If this GPE couldn't be enabled for the previous sleep state, it was
2863 * disabled before going to sleep so re-enable it. If it was enabled,
2864 * clear _PSW and turn off any power resources it used.
2865 */
2866 if (sstate > prw.lowest_wake) {
2867 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_ENABLE);
2868 if (bootverbose)
2869 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle));
2870 } else {
2871 acpi_SetInteger(handle, "_PSW", 0);
2872 acpi_pwr_wake_enable(handle, 0);
2873 if (bootverbose)
2874 device_printf(dev, "run_prep cleaned up for %s\n",
2875 acpi_name(handle));
2876 }
2877
2878 return (0);
2879 }
2880
2881 static ACPI_STATUS
2882 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status)
2883 {
2884 int sstate;
2885
2886 /* If suspending, run the sleep prep function, otherwise wake. */
2887 sstate = *(int *)context;
2888 if (AcpiGbl_SystemAwakeAndRunning)
2889 acpi_wake_sleep_prep(handle, sstate);
2890 else
2891 acpi_wake_run_prep(handle, sstate);
2892 return (AE_OK);
2893 }
2894
2895 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */
2896 static int
2897 acpi_wake_prep_walk(int sstate)
2898 {
2899 ACPI_HANDLE sb_handle;
2900
2901 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle)))
2902 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100,
2903 acpi_wake_prep, NULL, &sstate, NULL);
2904 return (0);
2905 }
2906
2907 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */
2908 static int
2909 acpi_wake_sysctl_walk(device_t dev)
2910 {
2911 int error, i, numdevs;
2912 device_t *devlist;
2913 device_t child;
2914 ACPI_STATUS status;
2915
2916 error = device_get_children(dev, &devlist, &numdevs);
2917 if (error != 0 || numdevs == 0) {
2918 if (numdevs == 0)
2919 free(devlist, M_TEMP);
2920 return (error);
2921 }
2922 for (i = 0; i < numdevs; i++) {
2923 child = devlist[i];
2924 acpi_wake_sysctl_walk(child);
2925 if (!device_is_attached(child))
2926 continue;
2927 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL);
2928 if (ACPI_SUCCESS(status)) {
2929 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child),
2930 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO,
2931 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0,
2932 acpi_wake_set_sysctl, "I", "Device set to wake the system");
2933 }
2934 }
2935 free(devlist, M_TEMP);
2936
2937 return (0);
2938 }
2939
2940 /* Enable or disable wake from userland. */
2941 static int
2942 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS)
2943 {
2944 int enable, error;
2945 device_t dev;
2946
2947 dev = (device_t)arg1;
2948 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0;
2949
2950 error = sysctl_handle_int(oidp, &enable, 0, req);
2951 if (error != 0 || req->newptr == NULL)
2952 return (error);
2953 if (enable != 0 && enable != 1)
2954 return (EINVAL);
2955
2956 return (acpi_wake_set_enable(dev, enable));
2957 }
2958
2959 /* Parse a device's _PRW into a structure. */
2960 int
2961 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw)
2962 {
2963 ACPI_STATUS status;
2964 ACPI_BUFFER prw_buffer;
2965 ACPI_OBJECT *res, *res2;
2966 int error, i, power_count;
2967
2968 if (h == NULL || prw == NULL)
2969 return (EINVAL);
2970
2971 /*
2972 * The _PRW object (7.2.9) is only required for devices that have the
2973 * ability to wake the system from a sleeping state.
2974 */
2975 error = EINVAL;
2976 prw_buffer.Pointer = NULL;
2977 prw_buffer.Length = ACPI_ALLOCATE_BUFFER;
2978 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer);
2979 if (ACPI_FAILURE(status))
2980 return (ENOENT);
2981 res = (ACPI_OBJECT *)prw_buffer.Pointer;
2982 if (res == NULL)
2983 return (ENOENT);
2984 if (!ACPI_PKG_VALID(res, 2))
2985 goto out;
2986
2987 /*
2988 * Element 1 of the _PRW object:
2989 * The lowest power system sleeping state that can be entered while still
2990 * providing wake functionality. The sleeping state being entered must
2991 * be less than (i.e., higher power) or equal to this value.
2992 */
2993 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0)
2994 goto out;
2995
2996 /*
2997 * Element 0 of the _PRW object:
2998 */
2999 switch (res->Package.Elements[0].Type) {
3000 case ACPI_TYPE_INTEGER:
3001 /*
3002 * If the data type of this package element is numeric, then this
3003 * _PRW package element is the bit index in the GPEx_EN, in the
3004 * GPE blocks described in the FADT, of the enable bit that is
3005 * enabled for the wake event.
3006 */
3007 prw->gpe_handle = NULL;
3008 prw->gpe_bit = res->Package.Elements[0].Integer.Value;
3009 error = 0;
3010 break;
3011 case ACPI_TYPE_PACKAGE:
3012 /*
3013 * If the data type of this package element is a package, then this
3014 * _PRW package element is itself a package containing two
3015 * elements. The first is an object reference to the GPE Block
3016 * device that contains the GPE that will be triggered by the wake
3017 * event. The second element is numeric and it contains the bit
3018 * index in the GPEx_EN, in the GPE Block referenced by the
3019 * first element in the package, of the enable bit that is enabled for
3020 * the wake event.
3021 *
3022 * For example, if this field is a package then it is of the form:
3023 * Package() {\_SB.PCI0.ISA.GPE, 2}
3024 */
3025 res2 = &res->Package.Elements[0];
3026 if (!ACPI_PKG_VALID(res2, 2))
3027 goto out;
3028 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]);
3029 if (prw->gpe_handle == NULL)
3030 goto out;
3031 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0)
3032 goto out;
3033 error = 0;
3034 break;
3035 default:
3036 goto out;
3037 }
3038
3039 /* Elements 2 to N of the _PRW object are power resources. */
3040 power_count = res->Package.Count - 2;
3041 if (power_count > ACPI_PRW_MAX_POWERRES) {
3042 printf("ACPI device %s has too many power resources\n", acpi_name(h));
3043 power_count = 0;
3044 }
3045 prw->power_res_count = power_count;
3046 for (i = 0; i < power_count; i++)
3047 prw->power_res[i] = res->Package.Elements[i];
3048
3049 out:
3050 if (prw_buffer.Pointer != NULL)
3051 AcpiOsFree(prw_buffer.Pointer);
3052 return (error);
3053 }
3054
3055 /*
3056 * ACPI Event Handlers
3057 */
3058
3059 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */
3060
3061 static void
3062 acpi_system_eventhandler_sleep(void *arg, int state)
3063 {
3064 struct acpi_softc *sc = (struct acpi_softc *)arg;
3065 int ret;
3066
3067 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
3068
3069 /* Check if button action is disabled or unknown. */
3070 if (state == ACPI_STATE_UNKNOWN)
3071 return;
3072
3073 /* Request that the system prepare to enter the given suspend state. */
3074 ret = acpi_ReqSleepState(sc, state);
3075 if (ret != 0)
3076 device_printf(sc->acpi_dev,
3077 "request to enter state S%d failed (err %d)\n", state, ret);
3078
3079 return_VOID;
3080 }
3081
3082 static void
3083 acpi_system_eventhandler_wakeup(void *arg, int state)
3084 {
3085
3086 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
3087
3088 /* Currently, nothing to do for wakeup. */
3089
3090 return_VOID;
3091 }
3092
3093 /*
3094 * ACPICA Event Handlers (FixedEvent, also called from button notify handler)
3095 */
3096 static void
3097 acpi_invoke_sleep_eventhandler(void *context)
3098 {
3099
3100 EVENTHANDLER_INVOKE(acpi_sleep_event, *(int *)context);
3101 }
3102
3103 static void
3104 acpi_invoke_wake_eventhandler(void *context)
3105 {
3106
3107 EVENTHANDLER_INVOKE(acpi_wakeup_event, *(int *)context);
3108 }
3109
3110 UINT32
3111 acpi_event_power_button_sleep(void *context)
3112 {
3113 struct acpi_softc *sc = (struct acpi_softc *)context;
3114
3115 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
3116
3117 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER,
3118 acpi_invoke_sleep_eventhandler, &sc->acpi_power_button_sx)))
3119 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
3120 return_VALUE (ACPI_INTERRUPT_HANDLED);
3121 }
3122
3123 UINT32
3124 acpi_event_power_button_wake(void *context)
3125 {
3126 struct acpi_softc *sc = (struct acpi_softc *)context;
3127
3128 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
3129
3130 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER,
3131 acpi_invoke_wake_eventhandler, &sc->acpi_power_button_sx)))
3132 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
3133 return_VALUE (ACPI_INTERRUPT_HANDLED);
3134 }
3135
3136 UINT32
3137 acpi_event_sleep_button_sleep(void *context)
3138 {
3139 struct acpi_softc *sc = (struct acpi_softc *)context;
3140
3141 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
3142
3143 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER,
3144 acpi_invoke_sleep_eventhandler, &sc->acpi_sleep_button_sx)))
3145 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
3146 return_VALUE (ACPI_INTERRUPT_HANDLED);
3147 }
3148
3149 UINT32
3150 acpi_event_sleep_button_wake(void *context)
3151 {
3152 struct acpi_softc *sc = (struct acpi_softc *)context;
3153
3154 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
3155
3156 if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER,
3157 acpi_invoke_wake_eventhandler, &sc->acpi_sleep_button_sx)))
3158 return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
3159 return_VALUE (ACPI_INTERRUPT_HANDLED);
3160 }
3161
3162 /*
3163 * XXX This static buffer is suboptimal. There is no locking so only
3164 * use this for single-threaded callers.
3165 */
3166 char *
3167 acpi_name(ACPI_HANDLE handle)
3168 {
3169 ACPI_BUFFER buf;
3170 static char data[256];
3171
3172 buf.Length = sizeof(data);
3173 buf.Pointer = data;
3174
3175 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf)))
3176 return (data);
3177 return ("(unknown)");
3178 }
3179
3180 /*
3181 * Debugging/bug-avoidance. Avoid trying to fetch info on various
3182 * parts of the namespace.
3183 */
3184 int
3185 acpi_avoid(ACPI_HANDLE handle)
3186 {
3187 char *cp, *env, *np;
3188 int len;
3189
3190 np = acpi_name(handle);
3191 if (*np == '\\')
3192 np++;
3193 if ((env = getenv("debug.acpi.avoid")) == NULL)
3194 return (0);
3195
3196 /* Scan the avoid list checking for a match */
3197 cp = env;
3198 for (;;) {
3199 while (*cp != 0 && isspace(*cp))
3200 cp++;
3201 if (*cp == 0)
3202 break;
3203 len = 0;
3204 while (cp[len] != 0 && !isspace(cp[len]))
3205 len++;
3206 if (!strncmp(cp, np, len)) {
3207 freeenv(env);
3208 return(1);
3209 }
3210 cp += len;
3211 }
3212 freeenv(env);
3213
3214 return (0);
3215 }
3216
3217 /*
3218 * Debugging/bug-avoidance. Disable ACPI subsystem components.
3219 */
3220 int
3221 acpi_disabled(char *subsys)
3222 {
3223 char *cp, *env;
3224 int len;
3225
3226 if ((env = getenv("debug.acpi.disabled")) == NULL)
3227 return (0);
3228 if (strcmp(env, "all") == 0) {
3229 freeenv(env);
3230 return (1);
3231 }
3232
3233 /* Scan the disable list, checking for a match. */
3234 cp = env;
3235 for (;;) {
3236 while (*cp != '\0' && isspace(*cp))
3237 cp++;
3238 if (*cp == '\0')
3239 break;
3240 len = 0;
3241 while (cp[len] != '\0' && !isspace(cp[len]))
3242 len++;
3243 if (strncmp(cp, subsys, len) == 0) {
3244 freeenv(env);
3245 return (1);
3246 }
3247 cp += len;
3248 }
3249 freeenv(env);
3250
3251 return (0);
3252 }
3253
3254 /*
3255 * Control interface.
3256 *
3257 * We multiplex ioctls for all participating ACPI devices here. Individual
3258 * drivers wanting to be accessible via /dev/acpi should use the
3259 * register/deregister interface to make their handlers visible.
3260 */
3261 struct acpi_ioctl_hook
3262 {
3263 TAILQ_ENTRY(acpi_ioctl_hook) link;
3264 u_long cmd;
3265 acpi_ioctl_fn fn;
3266 void *arg;
3267 };
3268
3269 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks;
3270 static int acpi_ioctl_hooks_initted;
3271
3272 int
3273 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg)
3274 {
3275 struct acpi_ioctl_hook *hp;
3276
3277 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL)
3278 return (ENOMEM);
3279 hp->cmd = cmd;
3280 hp->fn = fn;
3281 hp->arg = arg;
3282
3283 ACPI_LOCK(acpi);
3284 if (acpi_ioctl_hooks_initted == 0) {
3285 TAILQ_INIT(&acpi_ioctl_hooks);
3286 acpi_ioctl_hooks_initted = 1;
3287 }
3288 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link);
3289 ACPI_UNLOCK(acpi);
3290
3291 return (0);
3292 }
3293
3294 void
3295 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn)
3296 {
3297 struct acpi_ioctl_hook *hp;
3298
3299 ACPI_LOCK(acpi);
3300 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link)
3301 if (hp->cmd == cmd && hp->fn == fn)
3302 break;
3303
3304 if (hp != NULL) {
3305 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link);
3306 free(hp, M_ACPIDEV);
3307 }
3308 ACPI_UNLOCK(acpi);
3309 }
3310
3311 static int
3312 acpiopen(struct cdev *dev, int flag, int fmt, struct thread *td)
3313 {
3314 return (0);
3315 }
3316
3317 static int
3318 acpiclose(struct cdev *dev, int flag, int fmt, struct thread *td)
3319 {
3320 return (0);
3321 }
3322
3323 static int
3324 acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
3325 {
3326 struct acpi_softc *sc;
3327 struct acpi_ioctl_hook *hp;
3328 int error, state;
3329
3330 error = 0;
3331 hp = NULL;
3332 sc = dev->si_drv1;
3333
3334 /*
3335 * Scan the list of registered ioctls, looking for handlers.
3336 */
3337 ACPI_LOCK(acpi);
3338 if (acpi_ioctl_hooks_initted)
3339 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) {
3340 if (hp->cmd == cmd)
3341 break;
3342 }
3343 ACPI_UNLOCK(acpi);
3344 if (hp)
3345 return (hp->fn(cmd, addr, hp->arg));
3346
3347 /*
3348 * Core ioctls are not permitted for non-writable user.
3349 * Currently, other ioctls just fetch information.
3350 * Not changing system behavior.
3351 */
3352 if ((flag & FWRITE) == 0)
3353 return (EPERM);
3354
3355 /* Core system ioctls. */
3356 switch (cmd) {
3357 case ACPIIO_REQSLPSTATE:
3358 state = *(int *)addr;
3359 if (state != ACPI_STATE_S5)
3360 return (acpi_ReqSleepState(sc, state));
3361 device_printf(sc->acpi_dev, "power off via acpi ioctl not supported\n");
3362 error = EOPNOTSUPP;
3363 break;
3364 case ACPIIO_ACKSLPSTATE:
3365 error = *(int *)addr;
3366 error = acpi_AckSleepState(sc->acpi_clone, error);
3367 break;
3368 case ACPIIO_SETSLPSTATE: /* DEPRECATED */
3369 state = *(int *)addr;
3370 if (state < ACPI_STATE_S0 || state > ACPI_S_STATES_MAX)
3371 return (EINVAL);
3372 if (!acpi_sleep_states[state])
3373 return (EOPNOTSUPP);
3374 if (ACPI_FAILURE(acpi_SetSleepState(sc, state)))
3375 error = ENXIO;
3376 break;
3377 default:
3378 error = ENXIO;
3379 break;
3380 }
3381
3382 return (error);
3383 }
3384
3385 static int
3386 acpi_sname2sstate(const char *sname)
3387 {
3388 int sstate;
3389
3390 if (toupper(sname[0]) == 'S') {
3391 sstate = sname[1] - '';
3392 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5 &&
3393 sname[2] == '\0')
3394 return (sstate);
3395 } else if (strcasecmp(sname, "NONE") == 0)
3396 return (ACPI_STATE_UNKNOWN);
3397 return (-1);
3398 }
3399
3400 static const char *
3401 acpi_sstate2sname(int sstate)
3402 {
3403 static const char *snames[] = { "S0", "S1", "S2", "S3", "S4", "S5" };
3404
3405 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5)
3406 return (snames[sstate]);
3407 else if (sstate == ACPI_STATE_UNKNOWN)
3408 return ("NONE");
3409 return (NULL);
3410 }
3411
3412 static int
3413 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
3414 {
3415 int error;
3416 struct sbuf sb;
3417 UINT8 state;
3418
3419 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND);
3420 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++)
3421 if (acpi_sleep_states[state])
3422 sbuf_printf(&sb, "%s ", acpi_sstate2sname(state));
3423 sbuf_trim(&sb);
3424 sbuf_finish(&sb);
3425 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req);
3426 sbuf_delete(&sb);
3427 return (error);
3428 }
3429
3430 static int
3431 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
3432 {
3433 char sleep_state[10];
3434 int error, new_state, old_state;
3435
3436 old_state = *(int *)oidp->oid_arg1;
3437 strlcpy(sleep_state, acpi_sstate2sname(old_state), sizeof(sleep_state));
3438 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req);
3439 if (error == 0 && req->newptr != NULL) {
3440 new_state = acpi_sname2sstate(sleep_state);
3441 if (new_state < ACPI_STATE_S1)
3442 return (EINVAL);
3443 if (new_state < ACPI_S_STATE_COUNT && !acpi_sleep_states[new_state])
3444 return (EOPNOTSUPP);
3445 if (new_state != old_state)
3446 *(int *)oidp->oid_arg1 = new_state;
3447 }
3448 return (error);
3449 }
3450
3451 /* Inform devctl(4) when we receive a Notify. */
3452 void
3453 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify)
3454 {
3455 char notify_buf[16];
3456 ACPI_BUFFER handle_buf;
3457 ACPI_STATUS status;
3458
3459 if (subsystem == NULL)
3460 return;
3461
3462 handle_buf.Pointer = NULL;
3463 handle_buf.Length = ACPI_ALLOCATE_BUFFER;
3464 status = AcpiNsHandleToPathname(h, &handle_buf);
3465 if (ACPI_FAILURE(status))
3466 return;
3467 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify);
3468 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf);
3469 AcpiOsFree(handle_buf.Pointer);
3470 }
3471
3472 #ifdef ACPI_DEBUG
3473 /*
3474 * Support for parsing debug options from the kernel environment.
3475 *
3476 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers
3477 * by specifying the names of the bits in the debug.acpi.layer and
3478 * debug.acpi.level environment variables. Bits may be unset by
3479 * prefixing the bit name with !.
3480 */
3481 struct debugtag
3482 {
3483 char *name;
3484 UINT32 value;
3485 };
3486
3487 static struct debugtag dbg_layer[] = {
3488 {"ACPI_UTILITIES", ACPI_UTILITIES},
3489 {"ACPI_HARDWARE", ACPI_HARDWARE},
3490 {"ACPI_EVENTS", ACPI_EVENTS},
3491 {"ACPI_TABLES", ACPI_TABLES},
3492 {"ACPI_NAMESPACE", ACPI_NAMESPACE},
3493 {"ACPI_PARSER", ACPI_PARSER},
3494 {"ACPI_DISPATCHER", ACPI_DISPATCHER},
3495 {"ACPI_EXECUTER", ACPI_EXECUTER},
3496 {"ACPI_RESOURCES", ACPI_RESOURCES},
3497 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER},
3498 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES},
3499 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER},
3500 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS},
3501
3502 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER},
3503 {"ACPI_BATTERY", ACPI_BATTERY},
3504 {"ACPI_BUS", ACPI_BUS},
3505 {"ACPI_BUTTON", ACPI_BUTTON},
3506 {"ACPI_EC", ACPI_EC},
3507 {"ACPI_FAN", ACPI_FAN},
3508 {"ACPI_POWERRES", ACPI_POWERRES},
3509 {"ACPI_PROCESSOR", ACPI_PROCESSOR},
3510 {"ACPI_THERMAL", ACPI_THERMAL},
3511 {"ACPI_TIMER", ACPI_TIMER},
3512 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS},
3513 {NULL, 0}
3514 };
3515
3516 static struct debugtag dbg_level[] = {
3517 {"ACPI_LV_INIT", ACPI_LV_INIT},
3518 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT},
3519 {"ACPI_LV_INFO", ACPI_LV_INFO},
3520 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS},
3521
3522 /* Trace verbosity level 1 [Standard Trace Level] */
3523 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES},
3524 {"ACPI_LV_PARSE", ACPI_LV_PARSE},
3525 {"ACPI_LV_LOAD", ACPI_LV_LOAD},
3526 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH},
3527 {"ACPI_LV_EXEC", ACPI_LV_EXEC},
3528 {"ACPI_LV_NAMES", ACPI_LV_NAMES},
3529 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION},
3530 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD},
3531 {"ACPI_LV_TABLES", ACPI_LV_TABLES},
3532 {"ACPI_LV_VALUES", ACPI_LV_VALUES},
3533 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS},
3534 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES},
3535 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS},
3536 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE},
3537 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1},
3538
3539 /* Trace verbosity level 2 [Function tracing and memory allocation] */
3540 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS},
3541 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS},
3542 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS},
3543 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2},
3544 {"ACPI_LV_ALL", ACPI_LV_ALL},
3545
3546 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */
3547 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX},
3548 {"ACPI_LV_THREADS", ACPI_LV_THREADS},
3549 {"ACPI_LV_IO", ACPI_LV_IO},
3550 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS},
3551 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3},
3552
3553 /* Exceptionally verbose output -- also used in the global "DebugLevel" */
3554 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE},
3555 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO},
3556 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES},
3557 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS},
3558 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE},
3559 {NULL, 0}
3560 };
3561
3562 static void
3563 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag)
3564 {
3565 char *ep;
3566 int i, l;
3567 int set;
3568
3569 while (*cp) {
3570 if (isspace(*cp)) {
3571 cp++;
3572 continue;
3573 }
3574 ep = cp;
3575 while (*ep && !isspace(*ep))
3576 ep++;
3577 if (*cp == '!') {
3578 set = 0;
3579 cp++;
3580 if (cp == ep)
3581 continue;
3582 } else {
3583 set = 1;
3584 }
3585 l = ep - cp;
3586 for (i = 0; tag[i].name != NULL; i++) {
3587 if (!strncmp(cp, tag[i].name, l)) {
3588 if (set)
3589 *flag |= tag[i].value;
3590 else
3591 *flag &= ~tag[i].value;
3592 }
3593 }
3594 cp = ep;
3595 }
3596 }
3597
3598 static void
3599 acpi_set_debugging(void *junk)
3600 {
3601 char *layer, *level;
3602
3603 if (cold) {
3604 AcpiDbgLayer = 0;
3605 AcpiDbgLevel = 0;
3606 }
3607
3608 layer = getenv("debug.acpi.layer");
3609 level = getenv("debug.acpi.level");
3610 if (layer == NULL && level == NULL)
3611 return;
3612
3613 printf("ACPI set debug");
3614 if (layer != NULL) {
3615 if (strcmp("NONE", layer) != 0)
3616 printf(" layer '%s'", layer);
3617 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer);
3618 freeenv(layer);
3619 }
3620 if (level != NULL) {
3621 if (strcmp("NONE", level) != 0)
3622 printf(" level '%s'", level);
3623 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel);
3624 freeenv(level);
3625 }
3626 printf("\n");
3627 }
3628
3629 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging,
3630 NULL);
3631
3632 static int
3633 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS)
3634 {
3635 int error, *dbg;
3636 struct debugtag *tag;
3637 struct sbuf sb;
3638
3639 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL)
3640 return (ENOMEM);
3641 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) {
3642 tag = &dbg_layer[0];
3643 dbg = &AcpiDbgLayer;
3644 } else {
3645 tag = &dbg_level[0];
3646 dbg = &AcpiDbgLevel;
3647 }
3648
3649 /* Get old values if this is a get request. */
3650 ACPI_SERIAL_BEGIN(acpi);
3651 if (*dbg == 0) {
3652 sbuf_cpy(&sb, "NONE");
3653 } else if (req->newptr == NULL) {
3654 for (; tag->name != NULL; tag++) {
3655 if ((*dbg & tag->value) == tag->value)
3656 sbuf_printf(&sb, "%s ", tag->name);
3657 }
3658 }
3659 sbuf_trim(&sb);
3660 sbuf_finish(&sb);
3661
3662 /* Copy out the old values to the user. */
3663 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb));
3664 sbuf_delete(&sb);
3665
3666 /* If the user is setting a string, parse it. */
3667 if (error == 0 && req->newptr != NULL) {
3668 *dbg = 0;
3669 setenv((char *)oidp->oid_arg1, (char *)req->newptr);
3670 acpi_set_debugging(NULL);
3671 }
3672 ACPI_SERIAL_END(acpi);
3673
3674 return (error);
3675 }
3676
3677 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING,
3678 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", "");
3679 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING,
3680 "debug.acpi.level", 0, acpi_debug_sysctl, "A", "");
3681 #endif /* ACPI_DEBUG */
3682
3683 static int
3684 acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS)
3685 {
3686 int error;
3687 int old;
3688
3689 old = acpi_debug_objects;
3690 error = sysctl_handle_int(oidp, &acpi_debug_objects, 0, req);
3691 if (error != 0 || req->newptr == NULL)
3692 return (error);
3693 if (old == acpi_debug_objects || (old && acpi_debug_objects))
3694 return (0);
3695
3696 ACPI_SERIAL_BEGIN(acpi);
3697 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE;
3698 ACPI_SERIAL_END(acpi);
3699
3700 return (0);
3701 }
3702
3703 static int
3704 acpi_parse_interfaces(char *str, struct acpi_interface *iface)
3705 {
3706 char *p;
3707 size_t len;
3708 int i, j;
3709
3710 p = str;
3711 while (isspace(*p) || *p == ',')
3712 p++;
3713 len = strlen(p);
3714 if (len == 0)
3715 return (0);
3716 p = strdup(p, M_TEMP);
3717 for (i = 0; i < len; i++)
3718 if (p[i] == ',')
3719 p[i] = '\0';
3720 i = j = 0;
3721 while (i < len)
3722 if (isspace(p[i]) || p[i] == '\0')
3723 i++;
3724 else {
3725 i += strlen(p + i) + 1;
3726 j++;
3727 }
3728 if (j == 0) {
3729 free(p, M_TEMP);
3730 return (0);
3731 }
3732 iface->data = malloc(sizeof(*iface->data) * j, M_TEMP, M_WAITOK);
3733 iface->num = j;
3734 i = j = 0;
3735 while (i < len)
3736 if (isspace(p[i]) || p[i] == '\0')
3737 i++;
3738 else {
3739 iface->data[j] = p + i;
3740 i += strlen(p + i) + 1;
3741 j++;
3742 }
3743
3744 return (j);
3745 }
3746
3747 static void
3748 acpi_free_interfaces(struct acpi_interface *iface)
3749 {
3750
3751 free(iface->data[0], M_TEMP);
3752 free(iface->data, M_TEMP);
3753 }
3754
3755 static void
3756 acpi_reset_interfaces(device_t dev)
3757 {
3758 struct acpi_interface list;
3759 ACPI_STATUS status;
3760 int i;
3761
3762 if (acpi_parse_interfaces(acpi_install_interface, &list) > 0) {
3763 for (i = 0; i < list.num; i++) {
3764 status = AcpiInstallInterface(list.data[i]);
3765 if (ACPI_FAILURE(status))
3766 device_printf(dev,
3767 "failed to install _OSI(\"%s\"): %s\n",
3768 list.data[i], AcpiFormatException(status));
3769 else if (bootverbose)
3770 device_printf(dev, "installed _OSI(\"%s\")\n",
3771 list.data[i]);
3772 }
3773 acpi_free_interfaces(&list);
3774 }
3775 if (acpi_parse_interfaces(acpi_remove_interface, &list) > 0) {
3776 for (i = 0; i < list.num; i++) {
3777 status = AcpiRemoveInterface(list.data[i]);
3778 if (ACPI_FAILURE(status))
3779 device_printf(dev,
3780 "failed to remove _OSI(\"%s\"): %s\n",
3781 list.data[i], AcpiFormatException(status));
3782 else if (bootverbose)
3783 device_printf(dev, "removed _OSI(\"%s\")\n",
3784 list.data[i]);
3785 }
3786 acpi_free_interfaces(&list);
3787 }
3788 }
3789
3790 static int
3791 acpi_pm_func(u_long cmd, void *arg, ...)
3792 {
3793 int state, acpi_state;
3794 int error;
3795 struct acpi_softc *sc;
3796 va_list ap;
3797
3798 error = 0;
3799 switch (cmd) {
3800 case POWER_CMD_SUSPEND:
3801 sc = (struct acpi_softc *)arg;
3802 if (sc == NULL) {
3803 error = EINVAL;
3804 goto out;
3805 }
3806
3807 va_start(ap, arg);
3808 state = va_arg(ap, int);
3809 va_end(ap);
3810
3811 switch (state) {
3812 case POWER_SLEEP_STATE_STANDBY:
3813 acpi_state = sc->acpi_standby_sx;
3814 break;
3815 case POWER_SLEEP_STATE_SUSPEND:
3816 acpi_state = sc->acpi_suspend_sx;
3817 break;
3818 case POWER_SLEEP_STATE_HIBERNATE:
3819 acpi_state = ACPI_STATE_S4;
3820 break;
3821 default:
3822 error = EINVAL;
3823 goto out;
3824 }
3825
3826 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state)))
3827 error = ENXIO;
3828 break;
3829 default:
3830 error = EINVAL;
3831 goto out;
3832 }
3833
3834 out:
3835 return (error);
3836 }
3837
3838 static void
3839 acpi_pm_register(void *arg)
3840 {
3841 if (!cold || resource_disabled("acpi", 0))
3842 return;
3843
3844 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL);
3845 }
3846
3847 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0);
Cache object: d55faef680a6b1a6d27fff63b0165288
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