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 * $FreeBSD: releng/5.3/sys/dev/acpica/acpi.c 136559 2004-10-15 16:02:43Z njl $
30 */
31
32 #include "opt_acpi.h"
33 #include <sys/param.h>
34 #include <sys/kernel.h>
35 #include <sys/proc.h>
36 #include <sys/fcntl.h>
37 #include <sys/malloc.h>
38 #include <sys/module.h>
39 #include <sys/bus.h>
40 #include <sys/conf.h>
41 #include <sys/ioccom.h>
42 #include <sys/reboot.h>
43 #include <sys/sysctl.h>
44 #include <sys/ctype.h>
45 #include <sys/linker.h>
46 #include <sys/power.h>
47 #include <sys/sbuf.h>
48 #include <sys/smp.h>
49
50 #include <machine/clock.h>
51 #include <machine/resource.h>
52 #include <machine/bus.h>
53 #include <sys/rman.h>
54 #include <isa/isavar.h>
55 #include <isa/pnpvar.h>
56
57 #include "acpi.h"
58 #include <dev/acpica/acpivar.h>
59 #include <dev/acpica/acpiio.h>
60 #include <contrib/dev/acpica/acnamesp.h>
61
62 MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices");
63
64 /* Hooks for the ACPI CA debugging infrastructure */
65 #define _COMPONENT ACPI_BUS
66 ACPI_MODULE_NAME("ACPI")
67
68 static d_open_t acpiopen;
69 static d_close_t acpiclose;
70 static d_ioctl_t acpiioctl;
71
72 static struct cdevsw acpi_cdevsw = {
73 .d_version = D_VERSION,
74 .d_open = acpiopen,
75 .d_close = acpiclose,
76 .d_ioctl = acpiioctl,
77 .d_name = "acpi",
78 };
79
80 /* Global mutex for locking access to the ACPI subsystem. */
81 struct mtx acpi_mutex;
82
83 /* Bitmap of device quirks. */
84 int acpi_quirks;
85
86 static int acpi_modevent(struct module *mod, int event, void *junk);
87 static void acpi_identify(driver_t *driver, device_t parent);
88 static int acpi_probe(device_t dev);
89 static int acpi_attach(device_t dev);
90 static int acpi_shutdown(device_t dev);
91 static device_t acpi_add_child(device_t bus, int order, const char *name,
92 int unit);
93 static int acpi_print_child(device_t bus, device_t child);
94 static int acpi_read_ivar(device_t dev, device_t child, int index,
95 uintptr_t *result);
96 static int acpi_write_ivar(device_t dev, device_t child, int index,
97 uintptr_t value);
98 static struct resource_list *acpi_get_rlist(device_t dev, device_t child);
99 static int acpi_sysres_alloc(device_t dev);
100 static struct resource_list_entry *acpi_sysres_find(device_t dev, int type,
101 u_long addr);
102 static struct resource *acpi_alloc_resource(device_t bus, device_t child,
103 int type, int *rid, u_long start, u_long end,
104 u_long count, u_int flags);
105 static int acpi_release_resource(device_t bus, device_t child, int type,
106 int rid, struct resource *r);
107 static uint32_t acpi_isa_get_logicalid(device_t dev);
108 static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count);
109 static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids);
110 static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev,
111 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters,
112 ACPI_BUFFER *ret);
113 static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level,
114 void *context, void **retval);
115 static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev,
116 int max_depth, acpi_scan_cb_t user_fn, void *arg);
117 static int acpi_isa_pnp_probe(device_t bus, device_t child,
118 struct isa_pnp_id *ids);
119 static void acpi_probe_children(device_t bus);
120 static int acpi_probe_order(ACPI_HANDLE handle, int *order);
121 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level,
122 void *context, void **status);
123 static BOOLEAN acpi_MatchHid(ACPI_HANDLE h, const char *hid);
124 static void acpi_shutdown_final(void *arg, int howto);
125 static void acpi_enable_fixed_events(struct acpi_softc *sc);
126 static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate);
127 static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate);
128 static int acpi_wake_prep_walk(int sstate);
129 static int acpi_wake_sysctl_walk(device_t dev);
130 static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS);
131 static void acpi_system_eventhandler_sleep(void *arg, int state);
132 static void acpi_system_eventhandler_wakeup(void *arg, int state);
133 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS);
134 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS);
135 static int acpi_pm_func(u_long cmd, void *arg, ...);
136 static int acpi_child_location_str_method(device_t acdev, device_t child,
137 char *buf, size_t buflen);
138 static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child,
139 char *buf, size_t buflen);
140
141 static device_method_t acpi_methods[] = {
142 /* Device interface */
143 DEVMETHOD(device_identify, acpi_identify),
144 DEVMETHOD(device_probe, acpi_probe),
145 DEVMETHOD(device_attach, acpi_attach),
146 DEVMETHOD(device_shutdown, acpi_shutdown),
147 DEVMETHOD(device_detach, bus_generic_detach),
148 DEVMETHOD(device_suspend, bus_generic_suspend),
149 DEVMETHOD(device_resume, bus_generic_resume),
150
151 /* Bus interface */
152 DEVMETHOD(bus_add_child, acpi_add_child),
153 DEVMETHOD(bus_print_child, acpi_print_child),
154 DEVMETHOD(bus_read_ivar, acpi_read_ivar),
155 DEVMETHOD(bus_write_ivar, acpi_write_ivar),
156 DEVMETHOD(bus_get_resource_list, acpi_get_rlist),
157 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource),
158 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
159 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource),
160 DEVMETHOD(bus_release_resource, acpi_release_resource),
161 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method),
162 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method),
163 DEVMETHOD(bus_driver_added, bus_generic_driver_added),
164 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
165 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
166 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
167 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
168
169 /* ACPI bus */
170 DEVMETHOD(acpi_id_probe, acpi_device_id_probe),
171 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj),
172 DEVMETHOD(acpi_scan_children, acpi_device_scan_children),
173
174 /* ISA emulation */
175 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe),
176
177 {0, 0}
178 };
179
180 static driver_t acpi_driver = {
181 "acpi",
182 acpi_methods,
183 sizeof(struct acpi_softc),
184 };
185
186 static devclass_t acpi_devclass;
187 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0);
188 MODULE_VERSION(acpi, 1);
189
190 ACPI_SERIAL_DECL(acpi, "ACPI root bus");
191
192 /* Local pools for managing system resources for ACPI child devices. */
193 static struct rman acpi_rman_io, acpi_rman_mem;
194
195 #define ACPI_MINIMUM_AWAKETIME 5
196
197 static const char* sleep_state_names[] = {
198 "S0", "S1", "S2", "S3", "S4", "S5", "NONE"};
199
200 SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RW, NULL, "ACPI debugging");
201 static char acpi_ca_version[12];
202 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD,
203 acpi_ca_version, 0, "Version of Intel ACPI-CA");
204
205 /*
206 * Allow override of whether methods execute in parallel or not.
207 * Enable this for serial behavior, which fixes "AE_ALREADY_EXISTS"
208 * errors for AML that really can't handle parallel method execution.
209 * It is off by default since this breaks recursive methods and
210 * some IBMs use such code.
211 */
212 static int acpi_serialize_methods;
213 TUNABLE_INT("hw.acpi.serialize_methods", &acpi_serialize_methods);
214
215 /*
216 * ACPI can only be loaded as a module by the loader; activating it after
217 * system bootstrap time is not useful, and can be fatal to the system.
218 * It also cannot be unloaded, since the entire system bus heirarchy hangs
219 * off it.
220 */
221 static int
222 acpi_modevent(struct module *mod, int event, void *junk)
223 {
224 switch (event) {
225 case MOD_LOAD:
226 if (!cold) {
227 printf("The ACPI driver cannot be loaded after boot.\n");
228 return (EPERM);
229 }
230 break;
231 case MOD_UNLOAD:
232 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI)
233 return (EBUSY);
234 break;
235 default:
236 break;
237 }
238 return (0);
239 }
240
241 /*
242 * Perform early initialization.
243 */
244 ACPI_STATUS
245 acpi_Startup(void)
246 {
247 static int started = 0;
248 int error, val;
249
250 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
251
252 /* Only run the startup code once. The MADT driver also calls this. */
253 if (started)
254 return_VALUE (0);
255 started = 1;
256
257 /* Initialise the ACPI mutex */
258 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF);
259
260 /*
261 * Set the globals from our tunables. This is needed because ACPI-CA
262 * uses UINT8 for some values and we have no tunable_byte.
263 */
264 AcpiGbl_AllMethodsSerialized = (UINT8)acpi_serialize_methods;
265
266 /* Start up the ACPI CA subsystem. */
267 if (ACPI_FAILURE(error = AcpiInitializeSubsystem())) {
268 printf("ACPI: initialisation failed: %s\n", AcpiFormatException(error));
269 return_VALUE (error);
270 }
271
272 if (ACPI_FAILURE(error = AcpiLoadTables())) {
273 printf("ACPI: table load failed: %s\n", AcpiFormatException(error));
274 AcpiTerminate();
275 return_VALUE (error);
276 }
277
278 /* Set up any quirks we have for this system. */
279 acpi_table_quirks(&acpi_quirks);
280
281 /* If the user manually set the disabled hint to 0, override any quirk. */
282 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0)
283 acpi_quirks &= ~ACPI_Q_BROKEN;
284 if (acpi_quirks & ACPI_Q_BROKEN) {
285 printf("ACPI disabled by blacklist. Contact your BIOS vendor.\n");
286 AcpiTerminate();
287 return_VALUE (AE_ERROR);
288 }
289
290 return_VALUE (AE_OK);
291 }
292
293 /*
294 * Detect ACPI, perform early initialisation
295 */
296 static void
297 acpi_identify(driver_t *driver, device_t parent)
298 {
299 device_t child;
300
301 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
302
303 if (!cold)
304 return_VOID;
305
306 /* Check that we haven't been disabled with a hint. */
307 if (resource_disabled("acpi", 0))
308 return_VOID;
309
310 /* Make sure we're not being doubly invoked. */
311 if (device_find_child(parent, "acpi", 0) != NULL)
312 return_VOID;
313
314 /* Initialize ACPI-CA. */
315 if (ACPI_FAILURE(acpi_Startup()))
316 return_VOID;
317
318 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%#x", ACPI_CA_VERSION);
319
320 /* Attach the actual ACPI device. */
321 if ((child = BUS_ADD_CHILD(parent, 0, "acpi", 0)) == NULL) {
322 device_printf(parent, "device_identify failed\n");
323 return_VOID;
324 }
325 }
326
327 /*
328 * Fetch some descriptive data from ACPI to put in our attach message.
329 */
330 static int
331 acpi_probe(device_t dev)
332 {
333 ACPI_TABLE_HEADER th;
334 char buf[20];
335 int error;
336 struct sbuf sb;
337 ACPI_STATUS status;
338
339 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
340
341 if (power_pm_get_type() != POWER_PM_TYPE_NONE &&
342 power_pm_get_type() != POWER_PM_TYPE_ACPI) {
343 device_printf(dev, "probe failed, other PM system enabled.\n");
344 return_VALUE (ENXIO);
345 }
346
347 if (ACPI_FAILURE(status = AcpiGetTableHeader(ACPI_TABLE_XSDT, 1, &th))) {
348 device_printf(dev, "couldn't get XSDT header: %s\n",
349 AcpiFormatException(status));
350 error = ENXIO;
351 } else {
352 sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN);
353 sbuf_bcat(&sb, th.OemId, 6);
354 sbuf_trim(&sb);
355 sbuf_putc(&sb, ' ');
356 sbuf_bcat(&sb, th.OemTableId, 8);
357 sbuf_trim(&sb);
358 sbuf_finish(&sb);
359 device_set_desc_copy(dev, sbuf_data(&sb));
360 sbuf_delete(&sb);
361 error = 0;
362 }
363
364 return_VALUE (error);
365 }
366
367 static int
368 acpi_attach(device_t dev)
369 {
370 struct acpi_softc *sc;
371 ACPI_STATUS status;
372 int error, state;
373 UINT32 flags;
374 UINT8 TypeA, TypeB;
375 char *env;
376
377 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
378
379 sc = device_get_softc(dev);
380 sc->acpi_dev = dev;
381
382 /* Initialize resource manager. */
383 acpi_rman_io.rm_type = RMAN_ARRAY;
384 acpi_rman_io.rm_start = 0;
385 acpi_rman_io.rm_end = 0xffff;
386 acpi_rman_io.rm_descr = "I/O ports";
387 if (rman_init(&acpi_rman_io) != 0)
388 panic("acpi rman_init IO ports failed");
389 acpi_rman_mem.rm_type = RMAN_ARRAY;
390 acpi_rman_mem.rm_start = 0;
391 acpi_rman_mem.rm_end = ~0ul;
392 acpi_rman_mem.rm_descr = "I/O memory addresses";
393 if (rman_init(&acpi_rman_mem) != 0)
394 panic("acpi rman_init memory failed");
395
396 /* Install the default address space handlers. */
397 error = ENXIO;
398 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT,
399 ACPI_ADR_SPACE_SYSTEM_MEMORY, ACPI_DEFAULT_HANDLER, NULL, NULL);
400 if (ACPI_FAILURE(status)) {
401 device_printf(dev, "Could not initialise SystemMemory handler: %s\n",
402 AcpiFormatException(status));
403 goto out;
404 }
405 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT,
406 ACPI_ADR_SPACE_SYSTEM_IO, ACPI_DEFAULT_HANDLER, NULL, NULL);
407 if (ACPI_FAILURE(status)) {
408 device_printf(dev, "Could not initialise SystemIO handler: %s\n",
409 AcpiFormatException(status));
410 goto out;
411 }
412 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT,
413 ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL);
414 if (ACPI_FAILURE(status)) {
415 device_printf(dev, "could not initialise PciConfig handler: %s\n",
416 AcpiFormatException(status));
417 goto out;
418 }
419
420 /*
421 * Note that some systems (specifically, those with namespace evaluation
422 * issues that require the avoidance of parts of the namespace) must
423 * avoid running _INI and _STA on everything, as well as dodging the final
424 * object init pass.
425 *
426 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT).
427 *
428 * XXX We should arrange for the object init pass after we have attached
429 * all our child devices, but on many systems it works here.
430 */
431 flags = 0;
432 if (testenv("debug.acpi.avoid"))
433 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT;
434
435 /* Bring the hardware and basic handlers online. */
436 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) {
437 device_printf(dev, "Could not enable ACPI: %s\n",
438 AcpiFormatException(status));
439 goto out;
440 }
441
442 /*
443 * Call the ECDT probe function to provide EC functionality before
444 * the namespace has been evaluated.
445 */
446 acpi_ec_ecdt_probe(dev);
447
448 /* Bring device objects and regions online. */
449 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) {
450 device_printf(dev, "Could not initialize ACPI objects: %s\n",
451 AcpiFormatException(status));
452 goto out;
453 }
454
455 /*
456 * Setup our sysctl tree.
457 *
458 * XXX: This doesn't check to make sure that none of these fail.
459 */
460 sysctl_ctx_init(&sc->acpi_sysctl_ctx);
461 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx,
462 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO,
463 device_get_name(dev), CTLFLAG_RD, 0, "");
464 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
465 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD,
466 0, 0, acpi_supported_sleep_state_sysctl, "A", "");
467 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
468 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW,
469 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", "");
470 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
471 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW,
472 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", "");
473 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
474 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW,
475 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", "");
476 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
477 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW,
478 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", "");
479 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
480 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW,
481 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", "");
482 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
483 OID_AUTO, "sleep_delay", CTLFLAG_RD | CTLFLAG_RW,
484 &sc->acpi_sleep_delay, 0, "sleep delay");
485 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
486 OID_AUTO, "s4bios", CTLFLAG_RD | CTLFLAG_RW,
487 &sc->acpi_s4bios, 0, "S4BIOS mode");
488 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
489 OID_AUTO, "verbose", CTLFLAG_RD | CTLFLAG_RW,
490 &sc->acpi_verbose, 0, "verbose mode");
491
492 /*
493 * Default to 1 second before sleeping to give some machines time to
494 * stabilize.
495 */
496 sc->acpi_sleep_delay = 1;
497 if (bootverbose)
498 sc->acpi_verbose = 1;
499 if ((env = getenv("hw.acpi.verbose")) && strcmp(env, "")) {
500 sc->acpi_verbose = 1;
501 freeenv(env);
502 }
503
504 /* Only enable S4BIOS by default if the FACS says it is available. */
505 if (AcpiGbl_FACS->S4Bios_f != 0)
506 sc->acpi_s4bios = 1;
507
508 /*
509 * Dispatch the default sleep state to devices. The lid switch is set
510 * to NONE by default to avoid surprising users.
511 */
512 sc->acpi_power_button_sx = ACPI_STATE_S5;
513 sc->acpi_lid_switch_sx = ACPI_S_STATES_MAX + 1;
514 sc->acpi_standby_sx = ACPI_STATE_S1;
515 sc->acpi_suspend_sx = ACPI_STATE_S3;
516
517 /* Pick the first valid sleep state for the sleep button default. */
518 sc->acpi_sleep_button_sx = ACPI_S_STATES_MAX + 1;
519 for (state = ACPI_STATE_S1; state < ACPI_STATE_S5; state++)
520 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) {
521 sc->acpi_sleep_button_sx = state;
522 break;
523 }
524
525 acpi_enable_fixed_events(sc);
526
527 /*
528 * Scan the namespace and attach/initialise children.
529 */
530
531 /* Register our shutdown handler. */
532 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc,
533 SHUTDOWN_PRI_LAST);
534
535 /*
536 * Register our acpi event handlers.
537 * XXX should be configurable eg. via userland policy manager.
538 */
539 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep,
540 sc, ACPI_EVENT_PRI_LAST);
541 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup,
542 sc, ACPI_EVENT_PRI_LAST);
543
544 /* Flag our initial states. */
545 sc->acpi_enabled = 1;
546 sc->acpi_sstate = ACPI_STATE_S0;
547 sc->acpi_sleep_disabled = 0;
548
549 /* Create the control device */
550 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644,
551 "acpi");
552 sc->acpi_dev_t->si_drv1 = sc;
553
554 if ((error = acpi_task_thread_init()))
555 goto out;
556
557 if ((error = acpi_machdep_init(dev)))
558 goto out;
559
560 /* Register ACPI again to pass the correct argument of pm_func. */
561 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc);
562
563 if (!acpi_disabled("bus"))
564 acpi_probe_children(dev);
565
566 error = 0;
567
568 out:
569 return_VALUE (error);
570 }
571
572 static int
573 acpi_shutdown(device_t dev)
574 {
575
576 /* Allow children to shutdown first. */
577 bus_generic_shutdown(dev);
578
579 /*
580 * Enable any GPEs that are able to power-on the system (i.e., RTC).
581 * Also, disable any that are not valid for this state (most).
582 */
583 acpi_wake_prep_walk(ACPI_STATE_S5);
584
585 return (0);
586 }
587
588 /*
589 * Handle a new device being added
590 */
591 static device_t
592 acpi_add_child(device_t bus, int order, const char *name, int unit)
593 {
594 struct acpi_device *ad;
595 device_t child;
596
597 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL)
598 return (NULL);
599
600 resource_list_init(&ad->ad_rl);
601
602 child = device_add_child_ordered(bus, order, name, unit);
603 if (child != NULL)
604 device_set_ivars(child, ad);
605 return (child);
606 }
607
608 static int
609 acpi_print_child(device_t bus, device_t child)
610 {
611 struct acpi_device *adev = device_get_ivars(child);
612 struct resource_list *rl = &adev->ad_rl;
613 int retval = 0;
614
615 retval += bus_print_child_header(bus, child);
616 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx");
617 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx");
618 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
619 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld");
620 if (device_get_flags(child))
621 retval += printf(" flags %#x", device_get_flags(child));
622 retval += bus_print_child_footer(bus, child);
623
624 return (retval);
625 }
626
627 /* Location hint for devctl(8) */
628 static int
629 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf,
630 size_t buflen)
631 {
632 struct acpi_device *dinfo = device_get_ivars(child);
633
634 if (dinfo->ad_handle)
635 snprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle));
636 else
637 snprintf(buf, buflen, "unknown");
638 return (0);
639 }
640
641 /* PnP information for devctl(8) */
642 static int
643 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf,
644 size_t buflen)
645 {
646 ACPI_BUFFER adbuf = {ACPI_ALLOCATE_BUFFER, NULL};
647 ACPI_DEVICE_INFO *adinfo;
648 struct acpi_device *dinfo = device_get_ivars(child);
649 char *end;
650 int error;
651
652 error = AcpiGetObjectInfo(dinfo->ad_handle, &adbuf);
653 adinfo = (ACPI_DEVICE_INFO *) adbuf.Pointer;
654 if (error)
655 snprintf(buf, buflen, "unknown");
656 else
657 snprintf(buf, buflen, "_HID=%s _UID=%lu",
658 (adinfo->Valid & ACPI_VALID_HID) ?
659 adinfo->HardwareId.Value : "none",
660 (adinfo->Valid & ACPI_VALID_UID) ?
661 strtoul(adinfo->UniqueId.Value, &end, 10) : 0);
662 if (adinfo)
663 AcpiOsFree(adinfo);
664
665 return (0);
666 }
667
668 /*
669 * Handle per-device ivars
670 */
671 static int
672 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
673 {
674 struct acpi_device *ad;
675
676 if ((ad = device_get_ivars(child)) == NULL) {
677 printf("device has no ivars\n");
678 return (ENOENT);
679 }
680
681 /* ACPI and ISA compatibility ivars */
682 switch(index) {
683 case ACPI_IVAR_HANDLE:
684 *(ACPI_HANDLE *)result = ad->ad_handle;
685 break;
686 case ACPI_IVAR_MAGIC:
687 *(int *)result = ad->ad_magic;
688 break;
689 case ACPI_IVAR_PRIVATE:
690 *(void **)result = ad->ad_private;
691 break;
692 case ACPI_IVAR_FLAGS:
693 *(int *)result = ad->ad_flags;
694 break;
695 case ISA_IVAR_VENDORID:
696 case ISA_IVAR_SERIAL:
697 case ISA_IVAR_COMPATID:
698 *(int *)result = -1;
699 break;
700 case ISA_IVAR_LOGICALID:
701 *(int *)result = acpi_isa_get_logicalid(child);
702 break;
703 default:
704 return (ENOENT);
705 }
706
707 return (0);
708 }
709
710 static int
711 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value)
712 {
713 struct acpi_device *ad;
714
715 if ((ad = device_get_ivars(child)) == NULL) {
716 printf("device has no ivars\n");
717 return (ENOENT);
718 }
719
720 switch(index) {
721 case ACPI_IVAR_HANDLE:
722 ad->ad_handle = (ACPI_HANDLE)value;
723 break;
724 case ACPI_IVAR_MAGIC:
725 ad->ad_magic = (int)value;
726 break;
727 case ACPI_IVAR_PRIVATE:
728 ad->ad_private = (void *)value;
729 break;
730 case ACPI_IVAR_FLAGS:
731 ad->ad_flags = (int)value;
732 break;
733 default:
734 panic("bad ivar write request (%d)", index);
735 return (ENOENT);
736 }
737
738 return (0);
739 }
740
741 /*
742 * Handle child resource allocation/removal
743 */
744 static struct resource_list *
745 acpi_get_rlist(device_t dev, device_t child)
746 {
747 struct acpi_device *ad;
748
749 ad = device_get_ivars(child);
750 return (&ad->ad_rl);
751 }
752
753 /*
754 * Pre-allocate/manage all memory and IO resources. Since rman can't handle
755 * duplicates, we merge any in the sysresource attach routine.
756 */
757 static int
758 acpi_sysres_alloc(device_t dev)
759 {
760 struct resource *res;
761 struct resource_list *rl;
762 struct resource_list_entry *rle;
763 struct rman *rm;
764
765 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev);
766 SLIST_FOREACH(rle, rl, link) {
767 if (rle->res != NULL) {
768 device_printf(dev, "duplicate resource for %lx\n", rle->start);
769 continue;
770 }
771
772 /* Only memory and IO resources are valid here. */
773 switch (rle->type) {
774 case SYS_RES_IOPORT:
775 rm = &acpi_rman_io;
776 break;
777 case SYS_RES_MEMORY:
778 rm = &acpi_rman_mem;
779 break;
780 default:
781 continue;
782 }
783
784 /* Pre-allocate resource and add to our rman pool. */
785 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type,
786 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 0);
787 if (res != NULL) {
788 rman_manage_region(rm, rman_get_start(res), rman_get_end(res));
789 rle->res = res;
790 } else
791 device_printf(dev, "reservation of %lx, %lx (%d) failed\n",
792 rle->start, rle->count, rle->type);
793 }
794 return (0);
795 }
796
797 /* Find if we manage a given resource. */
798 static struct resource_list_entry *
799 acpi_sysres_find(device_t dev, int type, u_long addr)
800 {
801 struct resource_list *rl;
802 struct resource_list_entry *rle;
803
804 ACPI_SERIAL_ASSERT(acpi);
805
806 /* We only consider IO and memory resources for our pool. */
807 rle = NULL;
808 if (type != SYS_RES_IOPORT && type != SYS_RES_MEMORY)
809 goto out;
810
811 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev);
812 SLIST_FOREACH(rle, rl, link) {
813 if (type == rle->type && addr >= rle->start &&
814 addr < rle->start + rle->count)
815 break;
816 }
817
818 out:
819 return (rle);
820 }
821
822 static struct resource *
823 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid,
824 u_long start, u_long end, u_long count, u_int flags)
825 {
826 ACPI_RESOURCE ares;
827 struct acpi_device *ad = device_get_ivars(child);
828 struct resource_list *rl = &ad->ad_rl;
829 struct resource_list_entry *rle;
830 struct resource *res;
831 struct rman *rm;
832
833 res = NULL;
834 ACPI_SERIAL_BEGIN(acpi);
835
836 /*
837 * If this is an allocation of the "default" range for a given RID, and
838 * we know what the resources for this device are (i.e., they're on the
839 * child's resource list), use those start/end values.
840 */
841 if (start == 0UL && end == ~0UL) {
842 rle = resource_list_find(rl, type, *rid);
843 if (rle == NULL)
844 goto out;
845 start = rle->start;
846 end = rle->end;
847 count = rle->count;
848 }
849
850 /* If we don't manage this address, pass the request up to the parent. */
851 rle = acpi_sysres_find(bus, type, start);
852 if (rle == NULL) {
853 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid,
854 start, end, count, flags);
855 } else {
856
857 /* We only handle memory and IO resources through rman. */
858 switch (type) {
859 case SYS_RES_IOPORT:
860 rm = &acpi_rman_io;
861 break;
862 case SYS_RES_MEMORY:
863 rm = &acpi_rman_mem;
864 break;
865 default:
866 panic("acpi_alloc_resource: invalid res type %d", type);
867 }
868
869 /* If we do know it, allocate it from the local pool. */
870 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE,
871 child);
872 if (res == NULL)
873 goto out;
874
875 /* Copy the bus tag and handle from the pre-allocated resource. */
876 rman_set_bustag(res, rman_get_bustag(rle->res));
877 rman_set_bushandle(res, rman_get_start(res));
878
879 /* If requested, activate the resource using the parent's method. */
880 if (flags & RF_ACTIVE)
881 if (bus_activate_resource(child, type, *rid, res) != 0) {
882 rman_release_resource(res);
883 res = NULL;
884 goto out;
885 }
886 }
887
888 if (res != NULL && device_get_parent(child) == bus)
889 switch (type) {
890 case SYS_RES_IRQ:
891 /*
892 * Since bus_config_intr() takes immediate effect, we cannot
893 * configure the interrupt associated with a device when we
894 * parse the resources but have to defer it until a driver
895 * actually allocates the interrupt via bus_alloc_resource().
896 *
897 * XXX: Should we handle the lookup failing?
898 */
899 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares)))
900 acpi_config_intr(child, &ares);
901 break;
902 }
903
904 out:
905 ACPI_SERIAL_END(acpi);
906 return (res);
907 }
908
909 static int
910 acpi_release_resource(device_t bus, device_t child, int type, int rid,
911 struct resource *r)
912 {
913 int ret;
914
915 ACPI_SERIAL_BEGIN(acpi);
916
917 /*
918 * If we know about this address, deactivate it and release it to the
919 * local pool. If we don't, pass this request up to the parent.
920 */
921 if (acpi_sysres_find(bus, type, rman_get_start(r)) == NULL) {
922 if (rman_get_flags(r) & RF_ACTIVE) {
923 ret = bus_deactivate_resource(child, type, rid, r);
924 if (ret != 0)
925 goto out;
926 }
927 ret = rman_release_resource(r);
928 } else
929 ret = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, type, rid, r);
930
931 out:
932 ACPI_SERIAL_END(acpi);
933 return (ret);
934 }
935
936 /* Allocate an IO port or memory resource, given its GAS. */
937 struct resource *
938 acpi_bus_alloc_gas(device_t dev, int *rid, ACPI_GENERIC_ADDRESS *gas)
939 {
940 int type;
941
942 if (gas == NULL || !ACPI_VALID_ADDRESS(gas->Address) ||
943 gas->RegisterBitWidth < 8)
944 return (NULL);
945
946 switch (gas->AddressSpaceId) {
947 case ACPI_ADR_SPACE_SYSTEM_MEMORY:
948 type = SYS_RES_MEMORY;
949 break;
950 case ACPI_ADR_SPACE_SYSTEM_IO:
951 type = SYS_RES_IOPORT;
952 break;
953 default:
954 return (NULL);
955 }
956
957 bus_set_resource(dev, type, *rid, gas->Address, gas->RegisterBitWidth / 8);
958 return (bus_alloc_resource_any(dev, type, rid, RF_ACTIVE));
959 }
960
961 /* Probe _HID and _CID for compatible ISA PNP ids. */
962 static uint32_t
963 acpi_isa_get_logicalid(device_t dev)
964 {
965 ACPI_DEVICE_INFO *devinfo;
966 ACPI_BUFFER buf;
967 ACPI_HANDLE h;
968 ACPI_STATUS error;
969 u_int32_t pnpid;
970
971 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
972
973 pnpid = 0;
974 buf.Pointer = NULL;
975 buf.Length = ACPI_ALLOCATE_BUFFER;
976
977 /* Fetch and validate the HID. */
978 if ((h = acpi_get_handle(dev)) == NULL)
979 goto out;
980 error = AcpiGetObjectInfo(h, &buf);
981 if (ACPI_FAILURE(error))
982 goto out;
983 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer;
984
985 if ((devinfo->Valid & ACPI_VALID_HID) != 0)
986 pnpid = PNP_EISAID(devinfo->HardwareId.Value);
987
988 out:
989 if (buf.Pointer != NULL)
990 AcpiOsFree(buf.Pointer);
991 return_VALUE (pnpid);
992 }
993
994 static int
995 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count)
996 {
997 ACPI_DEVICE_INFO *devinfo;
998 ACPI_BUFFER buf;
999 ACPI_HANDLE h;
1000 ACPI_STATUS error;
1001 uint32_t *pnpid;
1002 int valid, i;
1003
1004 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1005
1006 pnpid = cids;
1007 valid = 0;
1008 buf.Pointer = NULL;
1009 buf.Length = ACPI_ALLOCATE_BUFFER;
1010
1011 /* Fetch and validate the CID */
1012 if ((h = acpi_get_handle(dev)) == NULL)
1013 goto out;
1014 error = AcpiGetObjectInfo(h, &buf);
1015 if (ACPI_FAILURE(error))
1016 goto out;
1017 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer;
1018 if ((devinfo->Valid & ACPI_VALID_CID) == 0)
1019 goto out;
1020
1021 if (devinfo->CompatibilityId.Count < count)
1022 count = devinfo->CompatibilityId.Count;
1023 for (i = 0; i < count; i++) {
1024 if (strncmp(devinfo->CompatibilityId.Id[i].Value, "PNP", 3) != 0)
1025 continue;
1026 *pnpid++ = PNP_EISAID(devinfo->CompatibilityId.Id[i].Value);
1027 valid++;
1028 }
1029
1030 out:
1031 if (buf.Pointer != NULL)
1032 AcpiOsFree(buf.Pointer);
1033 return_VALUE (valid);
1034 }
1035
1036 static char *
1037 acpi_device_id_probe(device_t bus, device_t dev, char **ids)
1038 {
1039 ACPI_HANDLE h;
1040 int i;
1041
1042 h = acpi_get_handle(dev);
1043 if (ids == NULL || h == NULL || acpi_get_type(dev) != ACPI_TYPE_DEVICE)
1044 return (NULL);
1045
1046 /* Try to match one of the array of IDs with a HID or CID. */
1047 for (i = 0; ids[i] != NULL; i++) {
1048 if (acpi_MatchHid(h, ids[i]))
1049 return (ids[i]);
1050 }
1051 return (NULL);
1052 }
1053
1054 static ACPI_STATUS
1055 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname,
1056 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret)
1057 {
1058 ACPI_HANDLE h;
1059
1060 if (dev == NULL)
1061 h = ACPI_ROOT_OBJECT;
1062 else if ((h = acpi_get_handle(dev)) == NULL)
1063 return (AE_BAD_PARAMETER);
1064 return (AcpiEvaluateObject(h, pathname, parameters, ret));
1065 }
1066
1067 /* Callback arg for our implementation of walking the namespace. */
1068 struct acpi_device_scan_ctx {
1069 acpi_scan_cb_t user_fn;
1070 void *arg;
1071 ACPI_HANDLE parent;
1072 };
1073
1074 static ACPI_STATUS
1075 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval)
1076 {
1077 struct acpi_device_scan_ctx *ctx;
1078 device_t dev, old_dev;
1079 ACPI_STATUS status;
1080 ACPI_OBJECT_TYPE type;
1081
1082 /*
1083 * Skip this device if we think we'll have trouble with it or it is
1084 * the parent where the scan began.
1085 */
1086 ctx = (struct acpi_device_scan_ctx *)arg;
1087 if (acpi_avoid(h) || h == ctx->parent)
1088 return (AE_OK);
1089
1090 /* If this is not a valid device type (e.g., a method), skip it. */
1091 if (ACPI_FAILURE(AcpiGetType(h, &type)))
1092 return (AE_OK);
1093 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR &&
1094 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER)
1095 return (AE_OK);
1096
1097 /*
1098 * Call the user function with the current device. If it is unchanged
1099 * afterwards, return. Otherwise, we update the handle to the new dev.
1100 */
1101 old_dev = acpi_get_device(h);
1102 dev = old_dev;
1103 status = ctx->user_fn(h, &dev, level, ctx->arg);
1104 if (ACPI_FAILURE(status) || old_dev == dev)
1105 return (status);
1106
1107 /* Remove the old child and its connection to the handle. */
1108 if (old_dev != NULL) {
1109 device_delete_child(device_get_parent(old_dev), old_dev);
1110 AcpiDetachData(h, acpi_fake_objhandler);
1111 }
1112
1113 /* Recreate the handle association if the user created a device. */
1114 if (dev != NULL)
1115 AcpiAttachData(h, acpi_fake_objhandler, dev);
1116
1117 return (AE_OK);
1118 }
1119
1120 static ACPI_STATUS
1121 acpi_device_scan_children(device_t bus, device_t dev, int max_depth,
1122 acpi_scan_cb_t user_fn, void *arg)
1123 {
1124 ACPI_HANDLE h;
1125 struct acpi_device_scan_ctx ctx;
1126
1127 if (acpi_disabled("children"))
1128 return (AE_OK);
1129
1130 if (dev == NULL)
1131 h = ACPI_ROOT_OBJECT;
1132 else if ((h = acpi_get_handle(dev)) == NULL)
1133 return (AE_BAD_PARAMETER);
1134 ctx.user_fn = user_fn;
1135 ctx.arg = arg;
1136 ctx.parent = h;
1137 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth,
1138 acpi_device_scan_cb, &ctx, NULL));
1139 }
1140
1141 static int
1142 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids)
1143 {
1144 int result, cid_count, i;
1145 uint32_t lid, cids[8];
1146
1147 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1148
1149 /*
1150 * ISA-style drivers attached to ACPI may persist and
1151 * probe manually if we return ENOENT. We never want
1152 * that to happen, so don't ever return it.
1153 */
1154 result = ENXIO;
1155
1156 /* Scan the supplied IDs for a match */
1157 lid = acpi_isa_get_logicalid(child);
1158 cid_count = acpi_isa_get_compatid(child, cids, 8);
1159 while (ids && ids->ip_id) {
1160 if (lid == ids->ip_id) {
1161 result = 0;
1162 goto out;
1163 }
1164 for (i = 0; i < cid_count; i++) {
1165 if (cids[i] == ids->ip_id) {
1166 result = 0;
1167 goto out;
1168 }
1169 }
1170 ids++;
1171 }
1172
1173 out:
1174 if (result == 0 && ids->ip_desc)
1175 device_set_desc(child, ids->ip_desc);
1176
1177 return_VALUE (result);
1178 }
1179
1180 /*
1181 * Scan relevant portions of the ACPI namespace and attach child devices.
1182 *
1183 * Note that we only expect to find devices in the \_PR_, \_TZ_, \_SI_ and
1184 * \_SB_ scopes, and \_PR_ and \_TZ_ become obsolete in the ACPI 2.0 spec.
1185 */
1186 static void
1187 acpi_probe_children(device_t bus)
1188 {
1189 ACPI_HANDLE parent;
1190 ACPI_STATUS status;
1191 int i;
1192 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI", "\\_SB_", NULL};
1193
1194 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1195
1196 /*
1197 * Scan the namespace and insert placeholders for all the devices that
1198 * we find. We also probe/attach any early devices.
1199 *
1200 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because
1201 * we want to create nodes for all devices, not just those that are
1202 * currently present. (This assumes that we don't want to create/remove
1203 * devices as they appear, which might be smarter.)
1204 */
1205 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n"));
1206 for (i = 0; scopes[i] != NULL; i++) {
1207 status = AcpiGetHandle(ACPI_ROOT_OBJECT, scopes[i], &parent);
1208 if (ACPI_SUCCESS(status)) {
1209 AcpiWalkNamespace(ACPI_TYPE_ANY, parent, 100, acpi_probe_child,
1210 bus, NULL);
1211 }
1212 }
1213
1214 /* Pre-allocate resources for our rman from any sysresource devices. */
1215 acpi_sysres_alloc(bus);
1216
1217 /* Create any static children by calling device identify methods. */
1218 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n"));
1219 bus_generic_probe(bus);
1220
1221 /* Probe/attach all children, created staticly and from the namespace. */
1222 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n"));
1223 bus_generic_attach(bus);
1224
1225 /*
1226 * Some of these children may have attached others as part of their attach
1227 * process (eg. the root PCI bus driver), so rescan.
1228 */
1229 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n"));
1230 bus_generic_attach(bus);
1231
1232 /* Attach wake sysctls. */
1233 acpi_wake_sysctl_walk(bus);
1234
1235 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n"));
1236 return_VOID;
1237 }
1238
1239 /*
1240 * Determine the probe order for a given device and return non-zero if it
1241 * should be attached immediately.
1242 */
1243 static int
1244 acpi_probe_order(ACPI_HANDLE handle, int *order)
1245 {
1246 int ret;
1247
1248 /*
1249 * 1. I/O port and memory system resource holders
1250 * 2. Embedded controllers (to handle early accesses)
1251 */
1252 ret = 0;
1253 if (acpi_MatchHid(handle, "PNP0C01") || acpi_MatchHid(handle, "PNP0C02")) {
1254 *order = 1;
1255 ret = 1;
1256 } else if (acpi_MatchHid(handle, "PNP0C09")) {
1257 *order = 2;
1258 ret = 1;
1259 }
1260
1261 return (ret);
1262 }
1263
1264 /*
1265 * Evaluate a child device and determine whether we might attach a device to
1266 * it.
1267 */
1268 static ACPI_STATUS
1269 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status)
1270 {
1271 ACPI_OBJECT_TYPE type;
1272 device_t child, bus;
1273 int order, probe_now;
1274
1275 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1276
1277 /* Skip this device if we think we'll have trouble with it. */
1278 if (acpi_avoid(handle))
1279 return_ACPI_STATUS (AE_OK);
1280
1281 bus = (device_t)context;
1282 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) {
1283 switch (type) {
1284 case ACPI_TYPE_DEVICE:
1285 case ACPI_TYPE_PROCESSOR:
1286 case ACPI_TYPE_THERMAL:
1287 case ACPI_TYPE_POWER:
1288 if (acpi_disabled("children"))
1289 break;
1290
1291 /*
1292 * Create a placeholder device for this node. Sort the placeholder
1293 * so that the probe/attach passes will run breadth-first. Orders
1294 * less than 10 are reserved for special objects (i.e., system
1295 * resources). Larger values are used for all other devices.
1296 */
1297 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n",
1298 acpi_name(handle)));
1299 order = (level + 1) * 10;
1300 probe_now = acpi_probe_order(handle, &order);
1301 child = BUS_ADD_CHILD(bus, order, NULL, -1);
1302 if (child == NULL)
1303 break;
1304
1305 /* Associate the handle with the device_t and vice versa. */
1306 acpi_set_handle(child, handle);
1307 AcpiAttachData(handle, acpi_fake_objhandler, child);
1308
1309 /*
1310 * Check that the device is present. If it's not present,
1311 * leave it disabled (so that we have a device_t attached to
1312 * the handle, but we don't probe it).
1313 */
1314 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) {
1315 device_disable(child);
1316 break;
1317 }
1318
1319 /*
1320 * Get the device's resource settings and attach them.
1321 * Note that if the device has _PRS but no _CRS, we need
1322 * to decide when it's appropriate to try to configure the
1323 * device. Ignore the return value here; it's OK for the
1324 * device not to have any resources.
1325 */
1326 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL);
1327
1328 /* If order was overridden, probe/attach now rather than later. */
1329 if (probe_now)
1330 device_probe_and_attach(child);
1331 break;
1332 }
1333 }
1334
1335 return_ACPI_STATUS (AE_OK);
1336 }
1337
1338 /*
1339 * AcpiAttachData() requires an object handler but never uses it. This is a
1340 * placeholder object handler so we can store a device_t in an ACPI_HANDLE.
1341 */
1342 void
1343 acpi_fake_objhandler(ACPI_HANDLE h, UINT32 fn, void *data)
1344 {
1345 }
1346
1347 static void
1348 acpi_shutdown_final(void *arg, int howto)
1349 {
1350 ACPI_STATUS status;
1351
1352 /*
1353 * XXX Shutdown code should only run on the BSP (cpuid 0).
1354 * Some chipsets do not power off the system correctly if called from
1355 * an AP.
1356 */
1357 if ((howto & RB_POWEROFF) != 0) {
1358 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5);
1359 if (ACPI_FAILURE(status)) {
1360 printf("AcpiEnterSleepStatePrep failed - %s\n",
1361 AcpiFormatException(status));
1362 return;
1363 }
1364 printf("Powering system off using ACPI\n");
1365 ACPI_DISABLE_IRQS();
1366 status = AcpiEnterSleepState(ACPI_STATE_S5);
1367 if (ACPI_FAILURE(status)) {
1368 printf("ACPI power-off failed - %s\n", AcpiFormatException(status));
1369 } else {
1370 DELAY(1000000);
1371 printf("ACPI power-off failed - timeout\n");
1372 }
1373 } else {
1374 printf("Shutting down ACPI\n");
1375 AcpiTerminate();
1376 }
1377 }
1378
1379 static void
1380 acpi_enable_fixed_events(struct acpi_softc *sc)
1381 {
1382 static int first_time = 1;
1383
1384 /* Enable and clear fixed events and install handlers. */
1385 if (AcpiGbl_FADT != NULL && AcpiGbl_FADT->PwrButton == 0) {
1386 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON);
1387 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON,
1388 acpi_event_power_button_sleep, sc);
1389 if (first_time)
1390 device_printf(sc->acpi_dev, "Power Button (fixed)\n");
1391 }
1392 if (AcpiGbl_FADT != NULL && AcpiGbl_FADT->SleepButton == 0) {
1393 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON);
1394 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON,
1395 acpi_event_sleep_button_sleep, sc);
1396 if (first_time)
1397 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n");
1398 }
1399
1400 first_time = 0;
1401 }
1402
1403 /*
1404 * Returns true if the device is actually present and should
1405 * be attached to. This requires the present, enabled, UI-visible
1406 * and diagnostics-passed bits to be set.
1407 */
1408 BOOLEAN
1409 acpi_DeviceIsPresent(device_t dev)
1410 {
1411 ACPI_DEVICE_INFO *devinfo;
1412 ACPI_HANDLE h;
1413 ACPI_BUFFER buf;
1414 ACPI_STATUS error;
1415 int ret;
1416
1417 ret = FALSE;
1418 if ((h = acpi_get_handle(dev)) == NULL)
1419 return (FALSE);
1420 buf.Pointer = NULL;
1421 buf.Length = ACPI_ALLOCATE_BUFFER;
1422 error = AcpiGetObjectInfo(h, &buf);
1423 if (ACPI_FAILURE(error))
1424 return (FALSE);
1425 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer;
1426
1427 /* If no _STA method, must be present */
1428 if ((devinfo->Valid & ACPI_VALID_STA) == 0)
1429 ret = TRUE;
1430
1431 /* Return true for 'present' and 'functioning' */
1432 if (ACPI_DEVICE_PRESENT(devinfo->CurrentStatus))
1433 ret = TRUE;
1434
1435 AcpiOsFree(buf.Pointer);
1436 return (ret);
1437 }
1438
1439 /*
1440 * Returns true if the battery is actually present and inserted.
1441 */
1442 BOOLEAN
1443 acpi_BatteryIsPresent(device_t dev)
1444 {
1445 ACPI_DEVICE_INFO *devinfo;
1446 ACPI_HANDLE h;
1447 ACPI_BUFFER buf;
1448 ACPI_STATUS error;
1449 int ret;
1450
1451 ret = FALSE;
1452 if ((h = acpi_get_handle(dev)) == NULL)
1453 return (FALSE);
1454 buf.Pointer = NULL;
1455 buf.Length = ACPI_ALLOCATE_BUFFER;
1456 error = AcpiGetObjectInfo(h, &buf);
1457 if (ACPI_FAILURE(error))
1458 return (FALSE);
1459 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer;
1460
1461 /* If no _STA method, must be present */
1462 if ((devinfo->Valid & ACPI_VALID_STA) == 0)
1463 ret = TRUE;
1464
1465 /* Return true for 'present', 'battery present', and 'functioning' */
1466 if (ACPI_BATTERY_PRESENT(devinfo->CurrentStatus))
1467 ret = TRUE;
1468
1469 AcpiOsFree(buf.Pointer);
1470 return (ret);
1471 }
1472
1473 /*
1474 * Match a HID string against a handle
1475 */
1476 static BOOLEAN
1477 acpi_MatchHid(ACPI_HANDLE h, const char *hid)
1478 {
1479 ACPI_DEVICE_INFO *devinfo;
1480 ACPI_BUFFER buf;
1481 ACPI_STATUS error;
1482 int ret, i;
1483
1484 ret = FALSE;
1485 if (hid == NULL || h == NULL)
1486 return (ret);
1487 buf.Pointer = NULL;
1488 buf.Length = ACPI_ALLOCATE_BUFFER;
1489 error = AcpiGetObjectInfo(h, &buf);
1490 if (ACPI_FAILURE(error))
1491 return (ret);
1492 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer;
1493
1494 if ((devinfo->Valid & ACPI_VALID_HID) != 0 &&
1495 strcmp(hid, devinfo->HardwareId.Value) == 0)
1496 ret = TRUE;
1497 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) {
1498 for (i = 0; i < devinfo->CompatibilityId.Count; i++) {
1499 if (strcmp(hid, devinfo->CompatibilityId.Id[i].Value) == 0) {
1500 ret = TRUE;
1501 break;
1502 }
1503 }
1504 }
1505
1506 AcpiOsFree(buf.Pointer);
1507 return (ret);
1508 }
1509
1510 /*
1511 * Return the handle of a named object within our scope, ie. that of (parent)
1512 * or one if its parents.
1513 */
1514 ACPI_STATUS
1515 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result)
1516 {
1517 ACPI_HANDLE r;
1518 ACPI_STATUS status;
1519
1520 /* Walk back up the tree to the root */
1521 for (;;) {
1522 status = AcpiGetHandle(parent, path, &r);
1523 if (ACPI_SUCCESS(status)) {
1524 *result = r;
1525 return (AE_OK);
1526 }
1527 /* XXX Return error here? */
1528 if (status != AE_NOT_FOUND)
1529 return (AE_OK);
1530 if (ACPI_FAILURE(AcpiGetParent(parent, &r)))
1531 return (AE_NOT_FOUND);
1532 parent = r;
1533 }
1534 }
1535
1536 /* Find the difference between two PM tick counts. */
1537 uint32_t
1538 acpi_TimerDelta(uint32_t end, uint32_t start)
1539 {
1540 uint32_t delta;
1541
1542 if (end >= start)
1543 delta = end - start;
1544 else if (AcpiGbl_FADT->TmrValExt == 0)
1545 delta = ((0x00FFFFFF - start) + end + 1) & 0x00FFFFFF;
1546 else
1547 delta = ((0xFFFFFFFF - start) + end + 1);
1548 return (delta);
1549 }
1550
1551 /*
1552 * Allocate a buffer with a preset data size.
1553 */
1554 ACPI_BUFFER *
1555 acpi_AllocBuffer(int size)
1556 {
1557 ACPI_BUFFER *buf;
1558
1559 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL)
1560 return (NULL);
1561 buf->Length = size;
1562 buf->Pointer = (void *)(buf + 1);
1563 return (buf);
1564 }
1565
1566 ACPI_STATUS
1567 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number)
1568 {
1569 ACPI_OBJECT arg1;
1570 ACPI_OBJECT_LIST args;
1571
1572 arg1.Type = ACPI_TYPE_INTEGER;
1573 arg1.Integer.Value = number;
1574 args.Count = 1;
1575 args.Pointer = &arg1;
1576
1577 return (AcpiEvaluateObject(handle, path, &args, NULL));
1578 }
1579
1580 /*
1581 * Evaluate a path that should return an integer.
1582 */
1583 ACPI_STATUS
1584 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number)
1585 {
1586 ACPI_STATUS status;
1587 ACPI_BUFFER buf;
1588 ACPI_OBJECT param;
1589
1590 if (handle == NULL)
1591 handle = ACPI_ROOT_OBJECT;
1592
1593 /*
1594 * Assume that what we've been pointed at is an Integer object, or
1595 * a method that will return an Integer.
1596 */
1597 buf.Pointer = ¶m;
1598 buf.Length = sizeof(param);
1599 status = AcpiEvaluateObject(handle, path, NULL, &buf);
1600 if (ACPI_SUCCESS(status)) {
1601 if (param.Type == ACPI_TYPE_INTEGER)
1602 *number = param.Integer.Value;
1603 else
1604 status = AE_TYPE;
1605 }
1606
1607 /*
1608 * In some applications, a method that's expected to return an Integer
1609 * may instead return a Buffer (probably to simplify some internal
1610 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer,
1611 * convert it into an Integer as best we can.
1612 *
1613 * This is a hack.
1614 */
1615 if (status == AE_BUFFER_OVERFLOW) {
1616 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) {
1617 status = AE_NO_MEMORY;
1618 } else {
1619 status = AcpiEvaluateObject(handle, path, NULL, &buf);
1620 if (ACPI_SUCCESS(status))
1621 status = acpi_ConvertBufferToInteger(&buf, number);
1622 AcpiOsFree(buf.Pointer);
1623 }
1624 }
1625 return (status);
1626 }
1627
1628 ACPI_STATUS
1629 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number)
1630 {
1631 ACPI_OBJECT *p;
1632 UINT8 *val;
1633 int i;
1634
1635 p = (ACPI_OBJECT *)bufp->Pointer;
1636 if (p->Type == ACPI_TYPE_INTEGER) {
1637 *number = p->Integer.Value;
1638 return (AE_OK);
1639 }
1640 if (p->Type != ACPI_TYPE_BUFFER)
1641 return (AE_TYPE);
1642 if (p->Buffer.Length > sizeof(int))
1643 return (AE_BAD_DATA);
1644
1645 *number = 0;
1646 val = p->Buffer.Pointer;
1647 for (i = 0; i < p->Buffer.Length; i++)
1648 *number += val[i] << (i * 8);
1649 return (AE_OK);
1650 }
1651
1652 /*
1653 * Iterate over the elements of an a package object, calling the supplied
1654 * function for each element.
1655 *
1656 * XXX possible enhancement might be to abort traversal on error.
1657 */
1658 ACPI_STATUS
1659 acpi_ForeachPackageObject(ACPI_OBJECT *pkg,
1660 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg)
1661 {
1662 ACPI_OBJECT *comp;
1663 int i;
1664
1665 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE)
1666 return (AE_BAD_PARAMETER);
1667
1668 /* Iterate over components */
1669 i = 0;
1670 comp = pkg->Package.Elements;
1671 for (; i < pkg->Package.Count; i++, comp++)
1672 func(comp, arg);
1673
1674 return (AE_OK);
1675 }
1676
1677 /*
1678 * Find the (index)th resource object in a set.
1679 */
1680 ACPI_STATUS
1681 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp)
1682 {
1683 ACPI_RESOURCE *rp;
1684 int i;
1685
1686 rp = (ACPI_RESOURCE *)buf->Pointer;
1687 i = index;
1688 while (i-- > 0) {
1689 /* Range check */
1690 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length))
1691 return (AE_BAD_PARAMETER);
1692
1693 /* Check for terminator */
1694 if (rp->Id == ACPI_RSTYPE_END_TAG || rp->Length == 0)
1695 return (AE_NOT_FOUND);
1696 rp = ACPI_NEXT_RESOURCE(rp);
1697 }
1698 if (resp != NULL)
1699 *resp = rp;
1700
1701 return (AE_OK);
1702 }
1703
1704 /*
1705 * Append an ACPI_RESOURCE to an ACPI_BUFFER.
1706 *
1707 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER
1708 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible
1709 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of
1710 * resources.
1711 */
1712 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512
1713
1714 ACPI_STATUS
1715 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res)
1716 {
1717 ACPI_RESOURCE *rp;
1718 void *newp;
1719
1720 /* Initialise the buffer if necessary. */
1721 if (buf->Pointer == NULL) {
1722 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE;
1723 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL)
1724 return (AE_NO_MEMORY);
1725 rp = (ACPI_RESOURCE *)buf->Pointer;
1726 rp->Id = ACPI_RSTYPE_END_TAG;
1727 rp->Length = 0;
1728 }
1729 if (res == NULL)
1730 return (AE_OK);
1731
1732 /*
1733 * Scan the current buffer looking for the terminator.
1734 * This will either find the terminator or hit the end
1735 * of the buffer and return an error.
1736 */
1737 rp = (ACPI_RESOURCE *)buf->Pointer;
1738 for (;;) {
1739 /* Range check, don't go outside the buffer */
1740 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length))
1741 return (AE_BAD_PARAMETER);
1742 if (rp->Id == ACPI_RSTYPE_END_TAG || rp->Length == 0)
1743 break;
1744 rp = ACPI_NEXT_RESOURCE(rp);
1745 }
1746
1747 /*
1748 * Check the size of the buffer and expand if required.
1749 *
1750 * Required size is:
1751 * size of existing resources before terminator +
1752 * size of new resource and header +
1753 * size of terminator.
1754 *
1755 * Note that this loop should really only run once, unless
1756 * for some reason we are stuffing a *really* huge resource.
1757 */
1758 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) +
1759 res->Length + ACPI_RESOURCE_LENGTH_NO_DATA +
1760 ACPI_RESOURCE_LENGTH) >= buf->Length) {
1761 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL)
1762 return (AE_NO_MEMORY);
1763 bcopy(buf->Pointer, newp, buf->Length);
1764 rp = (ACPI_RESOURCE *)((u_int8_t *)newp +
1765 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer));
1766 AcpiOsFree(buf->Pointer);
1767 buf->Pointer = newp;
1768 buf->Length += buf->Length;
1769 }
1770
1771 /* Insert the new resource. */
1772 bcopy(res, rp, res->Length + ACPI_RESOURCE_LENGTH_NO_DATA);
1773
1774 /* And add the terminator. */
1775 rp = ACPI_NEXT_RESOURCE(rp);
1776 rp->Id = ACPI_RSTYPE_END_TAG;
1777 rp->Length = 0;
1778
1779 return (AE_OK);
1780 }
1781
1782 /*
1783 * Set interrupt model.
1784 */
1785 ACPI_STATUS
1786 acpi_SetIntrModel(int model)
1787 {
1788
1789 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model));
1790 }
1791
1792 static void
1793 acpi_sleep_enable(void *arg)
1794 {
1795
1796 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0;
1797 }
1798
1799 enum acpi_sleep_state {
1800 ACPI_SS_NONE,
1801 ACPI_SS_GPE_SET,
1802 ACPI_SS_DEV_SUSPEND,
1803 ACPI_SS_SLP_PREP,
1804 ACPI_SS_SLEPT,
1805 };
1806
1807 /*
1808 * Set the system sleep state
1809 *
1810 * Currently we support S1-S5 but S4 is only S4BIOS
1811 */
1812 ACPI_STATUS
1813 acpi_SetSleepState(struct acpi_softc *sc, int state)
1814 {
1815 ACPI_STATUS status;
1816 UINT8 TypeA;
1817 UINT8 TypeB;
1818 enum acpi_sleep_state slp_state;
1819
1820 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
1821
1822 status = AE_OK;
1823 ACPI_LOCK(acpi);
1824 if (sc->acpi_sleep_disabled) {
1825 if (sc->acpi_sstate != ACPI_STATE_S0)
1826 status = AE_ERROR;
1827 ACPI_UNLOCK(acpi);
1828 printf("acpi: suspend request ignored (not ready yet)\n");
1829 return (status);
1830 }
1831 sc->acpi_sleep_disabled = 1;
1832 ACPI_UNLOCK(acpi);
1833
1834 slp_state = ACPI_SS_NONE;
1835 switch (state) {
1836 case ACPI_STATE_S1:
1837 case ACPI_STATE_S2:
1838 case ACPI_STATE_S3:
1839 case ACPI_STATE_S4:
1840 status = AcpiGetSleepTypeData(state, &TypeA, &TypeB);
1841 if (status == AE_NOT_FOUND) {
1842 device_printf(sc->acpi_dev,
1843 "Sleep state S%d not supported by BIOS\n", state);
1844 break;
1845 } else if (ACPI_FAILURE(status)) {
1846 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n",
1847 AcpiFormatException(status));
1848 break;
1849 }
1850
1851 sc->acpi_sstate = state;
1852
1853 /* Enable any GPEs as appropriate and requested by the user. */
1854 acpi_wake_prep_walk(state);
1855 slp_state = ACPI_SS_GPE_SET;
1856
1857 /*
1858 * Inform all devices that we are going to sleep. If at least one
1859 * device fails, DEVICE_SUSPEND() automatically resumes the tree.
1860 *
1861 * XXX Note that a better two-pass approach with a 'veto' pass
1862 * followed by a "real thing" pass would be better, but the current
1863 * bus interface does not provide for this.
1864 */
1865 if (DEVICE_SUSPEND(root_bus) != 0) {
1866 device_printf(sc->acpi_dev, "device_suspend failed\n");
1867 break;
1868 }
1869 slp_state = ACPI_SS_DEV_SUSPEND;
1870
1871 status = AcpiEnterSleepStatePrep(state);
1872 if (ACPI_FAILURE(status)) {
1873 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n",
1874 AcpiFormatException(status));
1875 break;
1876 }
1877 slp_state = ACPI_SS_SLP_PREP;
1878
1879 if (sc->acpi_sleep_delay > 0)
1880 DELAY(sc->acpi_sleep_delay * 1000000);
1881
1882 if (state != ACPI_STATE_S1) {
1883 acpi_sleep_machdep(sc, state);
1884
1885 /* Re-enable ACPI hardware on wakeup from sleep state 4. */
1886 if (state == ACPI_STATE_S4)
1887 AcpiEnable();
1888 } else {
1889 ACPI_DISABLE_IRQS();
1890 status = AcpiEnterSleepState(state);
1891 if (ACPI_FAILURE(status)) {
1892 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n",
1893 AcpiFormatException(status));
1894 break;
1895 }
1896 }
1897 slp_state = ACPI_SS_SLEPT;
1898 break;
1899 case ACPI_STATE_S5:
1900 /*
1901 * Shut down cleanly and power off. This will call us back through the
1902 * shutdown handlers.
1903 */
1904 shutdown_nice(RB_POWEROFF);
1905 break;
1906 case ACPI_STATE_S0:
1907 default:
1908 status = AE_BAD_PARAMETER;
1909 break;
1910 }
1911
1912 /*
1913 * Back out state according to how far along we got in the suspend
1914 * process. This handles both the error and success cases.
1915 */
1916 if (slp_state >= ACPI_SS_GPE_SET) {
1917 acpi_wake_prep_walk(state);
1918 sc->acpi_sstate = ACPI_STATE_S0;
1919 }
1920 if (slp_state >= ACPI_SS_SLP_PREP)
1921 AcpiLeaveSleepState(state);
1922 if (slp_state >= ACPI_SS_DEV_SUSPEND)
1923 DEVICE_RESUME(root_bus);
1924 if (slp_state >= ACPI_SS_SLEPT)
1925 acpi_enable_fixed_events(sc);
1926
1927 /* Allow another sleep request after a while. */
1928 if (state != ACPI_STATE_S5)
1929 timeout(acpi_sleep_enable, (caddr_t)sc, hz * ACPI_MINIMUM_AWAKETIME);
1930
1931 return_ACPI_STATUS (status);
1932 }
1933
1934 /* Initialize a device's wake GPE. */
1935 int
1936 acpi_wake_init(device_t dev, int type)
1937 {
1938 struct acpi_prw_data prw;
1939
1940 /* Evaluate _PRW to find the GPE. */
1941 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0)
1942 return (ENXIO);
1943
1944 /* Set the requested type for the GPE (runtime, wake, or both). */
1945 if (ACPI_FAILURE(AcpiSetGpeType(prw.gpe_handle, prw.gpe_bit, type))) {
1946 device_printf(dev, "set GPE type failed\n");
1947 return (ENXIO);
1948 }
1949
1950 return (0);
1951 }
1952
1953 /* Enable or disable the device's wake GPE. */
1954 int
1955 acpi_wake_set_enable(device_t dev, int enable)
1956 {
1957 struct acpi_prw_data prw;
1958 ACPI_HANDLE handle;
1959 ACPI_STATUS status;
1960 int flags;
1961
1962 /* Make sure the device supports waking the system and get the GPE. */
1963 handle = acpi_get_handle(dev);
1964 if (acpi_parse_prw(handle, &prw) != 0)
1965 return (ENXIO);
1966
1967 flags = acpi_get_flags(dev);
1968 if (enable) {
1969 status = AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR);
1970 if (ACPI_FAILURE(status)) {
1971 device_printf(dev, "enable wake failed\n");
1972 return (ENXIO);
1973 }
1974 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED);
1975 } else {
1976 status = AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR);
1977 if (ACPI_FAILURE(status)) {
1978 device_printf(dev, "disable wake failed\n");
1979 return (ENXIO);
1980 }
1981 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED);
1982 }
1983
1984 return (0);
1985 }
1986
1987 static int
1988 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate)
1989 {
1990 struct acpi_prw_data prw;
1991 device_t dev;
1992
1993 /* Check that this is a wake-capable device and get its GPE. */
1994 if (acpi_parse_prw(handle, &prw) != 0)
1995 return (ENXIO);
1996 dev = acpi_get_device(handle);
1997
1998 /*
1999 * The destination sleep state must be less than (i.e., higher power)
2000 * or equal to the value specified by _PRW. If this GPE cannot be
2001 * enabled for the next sleep state, then disable it. If it can and
2002 * the user requested it be enabled, turn on any required power resources
2003 * and set _PSW.
2004 */
2005 if (sstate > prw.lowest_wake) {
2006 AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR);
2007 if (bootverbose)
2008 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n",
2009 acpi_name(handle), sstate);
2010 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) {
2011 acpi_pwr_wake_enable(handle, 1);
2012 acpi_SetInteger(handle, "_PSW", 1);
2013 if (bootverbose)
2014 device_printf(dev, "wake_prep enabled for %s (S%d)\n",
2015 acpi_name(handle), sstate);
2016 }
2017
2018 return (0);
2019 }
2020
2021 static int
2022 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate)
2023 {
2024 struct acpi_prw_data prw;
2025 device_t dev;
2026
2027 /*
2028 * Check that this is a wake-capable device and get its GPE. Return
2029 * now if the user didn't enable this device for wake.
2030 */
2031 if (acpi_parse_prw(handle, &prw) != 0)
2032 return (ENXIO);
2033 dev = acpi_get_device(handle);
2034 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0)
2035 return (0);
2036
2037 /*
2038 * If this GPE couldn't be enabled for the previous sleep state, it was
2039 * disabled before going to sleep so re-enable it. If it was enabled,
2040 * clear _PSW and turn off any power resources it used.
2041 */
2042 if (sstate > prw.lowest_wake) {
2043 AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR);
2044 if (bootverbose)
2045 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle));
2046 } else {
2047 acpi_SetInteger(handle, "_PSW", 0);
2048 acpi_pwr_wake_enable(handle, 0);
2049 if (bootverbose)
2050 device_printf(dev, "run_prep cleaned up for %s\n",
2051 acpi_name(handle));
2052 }
2053
2054 return (0);
2055 }
2056
2057 static ACPI_STATUS
2058 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status)
2059 {
2060 int sstate;
2061
2062 /* If suspending, run the sleep prep function, otherwise wake. */
2063 sstate = *(int *)context;
2064 if (AcpiGbl_SystemAwakeAndRunning)
2065 acpi_wake_sleep_prep(handle, sstate);
2066 else
2067 acpi_wake_run_prep(handle, sstate);
2068 return (AE_OK);
2069 }
2070
2071 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */
2072 static int
2073 acpi_wake_prep_walk(int sstate)
2074 {
2075 ACPI_HANDLE sb_handle;
2076
2077 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle)))
2078 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100,
2079 acpi_wake_prep, &sstate, NULL);
2080 return (0);
2081 }
2082
2083 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */
2084 static int
2085 acpi_wake_sysctl_walk(device_t dev)
2086 {
2087 int error, i, numdevs;
2088 device_t *devlist;
2089 device_t child;
2090 ACPI_STATUS status;
2091
2092 error = device_get_children(dev, &devlist, &numdevs);
2093 if (error != 0 || numdevs == 0)
2094 return (error);
2095 for (i = 0; i < numdevs; i++) {
2096 child = devlist[i];
2097 acpi_wake_sysctl_walk(child);
2098 if (!device_is_attached(child))
2099 continue;
2100 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL);
2101 if (ACPI_SUCCESS(status)) {
2102 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child),
2103 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO,
2104 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0,
2105 acpi_wake_set_sysctl, "I", "Device set to wake the system");
2106 }
2107 }
2108 free(devlist, M_TEMP);
2109
2110 return (0);
2111 }
2112
2113 /* Enable or disable wake from userland. */
2114 static int
2115 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS)
2116 {
2117 int enable, error;
2118 device_t dev;
2119
2120 dev = (device_t)arg1;
2121 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0;
2122
2123 error = sysctl_handle_int(oidp, &enable, 0, req);
2124 if (error != 0 || req->newptr == NULL)
2125 return (error);
2126 if (enable != 0 && enable != 1)
2127 return (EINVAL);
2128
2129 return (acpi_wake_set_enable(dev, enable));
2130 }
2131
2132 /* Parse a device's _PRW into a structure. */
2133 int
2134 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw)
2135 {
2136 ACPI_STATUS status;
2137 ACPI_BUFFER prw_buffer;
2138 ACPI_OBJECT *res, *res2;
2139 int error, i, power_count;
2140
2141 if (h == NULL || prw == NULL)
2142 return (EINVAL);
2143
2144 /*
2145 * The _PRW object (7.2.9) is only required for devices that have the
2146 * ability to wake the system from a sleeping state.
2147 */
2148 error = EINVAL;
2149 prw_buffer.Pointer = NULL;
2150 prw_buffer.Length = ACPI_ALLOCATE_BUFFER;
2151 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer);
2152 if (ACPI_FAILURE(status))
2153 return (ENOENT);
2154 res = (ACPI_OBJECT *)prw_buffer.Pointer;
2155 if (res == NULL)
2156 return (ENOENT);
2157 if (!ACPI_PKG_VALID(res, 2))
2158 goto out;
2159
2160 /*
2161 * Element 1 of the _PRW object:
2162 * The lowest power system sleeping state that can be entered while still
2163 * providing wake functionality. The sleeping state being entered must
2164 * be less than (i.e., higher power) or equal to this value.
2165 */
2166 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0)
2167 goto out;
2168
2169 /*
2170 * Element 0 of the _PRW object:
2171 */
2172 switch (res->Package.Elements[0].Type) {
2173 case ACPI_TYPE_INTEGER:
2174 /*
2175 * If the data type of this package element is numeric, then this
2176 * _PRW package element is the bit index in the GPEx_EN, in the
2177 * GPE blocks described in the FADT, of the enable bit that is
2178 * enabled for the wake event.
2179 */
2180 prw->gpe_handle = NULL;
2181 prw->gpe_bit = res->Package.Elements[0].Integer.Value;
2182 error = 0;
2183 break;
2184 case ACPI_TYPE_PACKAGE:
2185 /*
2186 * If the data type of this package element is a package, then this
2187 * _PRW package element is itself a package containing two
2188 * elements. The first is an object reference to the GPE Block
2189 * device that contains the GPE that will be triggered by the wake
2190 * event. The second element is numeric and it contains the bit
2191 * index in the GPEx_EN, in the GPE Block referenced by the
2192 * first element in the package, of the enable bit that is enabled for
2193 * the wake event.
2194 *
2195 * For example, if this field is a package then it is of the form:
2196 * Package() {\_SB.PCI0.ISA.GPE, 2}
2197 */
2198 res2 = &res->Package.Elements[0];
2199 if (!ACPI_PKG_VALID(res2, 2))
2200 goto out;
2201 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]);
2202 if (prw->gpe_handle == NULL)
2203 goto out;
2204 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0)
2205 goto out;
2206 error = 0;
2207 break;
2208 default:
2209 goto out;
2210 }
2211
2212 /* Elements 2 to N of the _PRW object are power resources. */
2213 power_count = res->Package.Count - 2;
2214 if (power_count > ACPI_PRW_MAX_POWERRES) {
2215 printf("ACPI device %s has too many power resources\n", acpi_name(h));
2216 power_count = 0;
2217 }
2218 prw->power_res_count = power_count;
2219 for (i = 0; i < power_count; i++)
2220 prw->power_res[i] = res->Package.Elements[i];
2221
2222 out:
2223 if (prw_buffer.Pointer != NULL)
2224 AcpiOsFree(prw_buffer.Pointer);
2225 return (error);
2226 }
2227
2228 /*
2229 * ACPI Event Handlers
2230 */
2231
2232 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */
2233
2234 static void
2235 acpi_system_eventhandler_sleep(void *arg, int state)
2236 {
2237
2238 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
2239
2240 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX)
2241 acpi_SetSleepState((struct acpi_softc *)arg, state);
2242
2243 return_VOID;
2244 }
2245
2246 static void
2247 acpi_system_eventhandler_wakeup(void *arg, int state)
2248 {
2249
2250 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
2251
2252 /* Currently, nothing to do for wakeup. */
2253
2254 return_VOID;
2255 }
2256
2257 /*
2258 * ACPICA Event Handlers (FixedEvent, also called from button notify handler)
2259 */
2260 UINT32
2261 acpi_event_power_button_sleep(void *context)
2262 {
2263 struct acpi_softc *sc = (struct acpi_softc *)context;
2264
2265 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
2266
2267 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx);
2268
2269 return_VALUE (ACPI_INTERRUPT_HANDLED);
2270 }
2271
2272 UINT32
2273 acpi_event_power_button_wake(void *context)
2274 {
2275 struct acpi_softc *sc = (struct acpi_softc *)context;
2276
2277 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
2278
2279 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx);
2280
2281 return_VALUE (ACPI_INTERRUPT_HANDLED);
2282 }
2283
2284 UINT32
2285 acpi_event_sleep_button_sleep(void *context)
2286 {
2287 struct acpi_softc *sc = (struct acpi_softc *)context;
2288
2289 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
2290
2291 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx);
2292
2293 return_VALUE (ACPI_INTERRUPT_HANDLED);
2294 }
2295
2296 UINT32
2297 acpi_event_sleep_button_wake(void *context)
2298 {
2299 struct acpi_softc *sc = (struct acpi_softc *)context;
2300
2301 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
2302
2303 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx);
2304
2305 return_VALUE (ACPI_INTERRUPT_HANDLED);
2306 }
2307
2308 /*
2309 * XXX This static buffer is suboptimal. There is no locking so only
2310 * use this for single-threaded callers.
2311 */
2312 char *
2313 acpi_name(ACPI_HANDLE handle)
2314 {
2315 ACPI_BUFFER buf;
2316 static char data[256];
2317
2318 buf.Length = sizeof(data);
2319 buf.Pointer = data;
2320
2321 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf)))
2322 return (data);
2323 return ("(unknown)");
2324 }
2325
2326 /*
2327 * Debugging/bug-avoidance. Avoid trying to fetch info on various
2328 * parts of the namespace.
2329 */
2330 int
2331 acpi_avoid(ACPI_HANDLE handle)
2332 {
2333 char *cp, *env, *np;
2334 int len;
2335
2336 np = acpi_name(handle);
2337 if (*np == '\\')
2338 np++;
2339 if ((env = getenv("debug.acpi.avoid")) == NULL)
2340 return (0);
2341
2342 /* Scan the avoid list checking for a match */
2343 cp = env;
2344 for (;;) {
2345 while (*cp != 0 && isspace(*cp))
2346 cp++;
2347 if (*cp == 0)
2348 break;
2349 len = 0;
2350 while (cp[len] != 0 && !isspace(cp[len]))
2351 len++;
2352 if (!strncmp(cp, np, len)) {
2353 freeenv(env);
2354 return(1);
2355 }
2356 cp += len;
2357 }
2358 freeenv(env);
2359
2360 return (0);
2361 }
2362
2363 /*
2364 * Debugging/bug-avoidance. Disable ACPI subsystem components.
2365 */
2366 int
2367 acpi_disabled(char *subsys)
2368 {
2369 char *cp, *env;
2370 int len;
2371
2372 if ((env = getenv("debug.acpi.disabled")) == NULL)
2373 return (0);
2374 if (strcmp(env, "all") == 0) {
2375 freeenv(env);
2376 return (1);
2377 }
2378
2379 /* Scan the disable list, checking for a match. */
2380 cp = env;
2381 for (;;) {
2382 while (*cp != '\0' && isspace(*cp))
2383 cp++;
2384 if (*cp == '\0')
2385 break;
2386 len = 0;
2387 while (cp[len] != '\0' && !isspace(cp[len]))
2388 len++;
2389 if (strncmp(cp, subsys, len) == 0) {
2390 freeenv(env);
2391 return (1);
2392 }
2393 cp += len;
2394 }
2395 freeenv(env);
2396
2397 return (0);
2398 }
2399
2400 /*
2401 * Control interface.
2402 *
2403 * We multiplex ioctls for all participating ACPI devices here. Individual
2404 * drivers wanting to be accessible via /dev/acpi should use the
2405 * register/deregister interface to make their handlers visible.
2406 */
2407 struct acpi_ioctl_hook
2408 {
2409 TAILQ_ENTRY(acpi_ioctl_hook) link;
2410 u_long cmd;
2411 acpi_ioctl_fn fn;
2412 void *arg;
2413 };
2414
2415 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks;
2416 static int acpi_ioctl_hooks_initted;
2417
2418 int
2419 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg)
2420 {
2421 struct acpi_ioctl_hook *hp;
2422
2423 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL)
2424 return (ENOMEM);
2425 hp->cmd = cmd;
2426 hp->fn = fn;
2427 hp->arg = arg;
2428
2429 ACPI_LOCK(acpi);
2430 if (acpi_ioctl_hooks_initted == 0) {
2431 TAILQ_INIT(&acpi_ioctl_hooks);
2432 acpi_ioctl_hooks_initted = 1;
2433 }
2434 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link);
2435 ACPI_UNLOCK(acpi);
2436
2437 return (0);
2438 }
2439
2440 void
2441 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn)
2442 {
2443 struct acpi_ioctl_hook *hp;
2444
2445 ACPI_LOCK(acpi);
2446 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link)
2447 if (hp->cmd == cmd && hp->fn == fn)
2448 break;
2449
2450 if (hp != NULL) {
2451 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link);
2452 free(hp, M_ACPIDEV);
2453 }
2454 ACPI_UNLOCK(acpi);
2455 }
2456
2457 static int
2458 acpiopen(struct cdev *dev, int flag, int fmt, d_thread_t *td)
2459 {
2460 return (0);
2461 }
2462
2463 static int
2464 acpiclose(struct cdev *dev, int flag, int fmt, d_thread_t *td)
2465 {
2466 return (0);
2467 }
2468
2469 static int
2470 acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, d_thread_t *td)
2471 {
2472 struct acpi_softc *sc;
2473 struct acpi_ioctl_hook *hp;
2474 int error, state;
2475
2476 error = 0;
2477 hp = NULL;
2478 sc = dev->si_drv1;
2479
2480 /*
2481 * Scan the list of registered ioctls, looking for handlers.
2482 */
2483 ACPI_LOCK(acpi);
2484 if (acpi_ioctl_hooks_initted)
2485 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) {
2486 if (hp->cmd == cmd)
2487 break;
2488 }
2489 ACPI_UNLOCK(acpi);
2490 if (hp)
2491 return (hp->fn(cmd, addr, hp->arg));
2492
2493 /*
2494 * Core ioctls are not permitted for non-writable user.
2495 * Currently, other ioctls just fetch information.
2496 * Not changing system behavior.
2497 */
2498 if ((flag & FWRITE) == 0)
2499 return (EPERM);
2500
2501 /* Core system ioctls. */
2502 switch (cmd) {
2503 case ACPIIO_SETSLPSTATE:
2504 error = EINVAL;
2505 state = *(int *)addr;
2506 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX)
2507 if (ACPI_SUCCESS(acpi_SetSleepState(sc, state)))
2508 error = 0;
2509 break;
2510 default:
2511 error = ENXIO;
2512 break;
2513 }
2514
2515 return (error);
2516 }
2517
2518 static int
2519 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
2520 {
2521 int error;
2522 struct sbuf sb;
2523 UINT8 state, TypeA, TypeB;
2524
2525 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND);
2526 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX + 1; state++)
2527 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB)))
2528 sbuf_printf(&sb, "S%d ", state);
2529 sbuf_trim(&sb);
2530 sbuf_finish(&sb);
2531 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req);
2532 sbuf_delete(&sb);
2533 return (error);
2534 }
2535
2536 static int
2537 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
2538 {
2539 char sleep_state[10];
2540 int error;
2541 u_int new_state, old_state;
2542
2543 old_state = *(u_int *)oidp->oid_arg1;
2544 if (old_state > ACPI_S_STATES_MAX + 1)
2545 strlcpy(sleep_state, "unknown", sizeof(sleep_state));
2546 else
2547 strlcpy(sleep_state, sleep_state_names[old_state], sizeof(sleep_state));
2548 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req);
2549 if (error == 0 && req->newptr != NULL) {
2550 new_state = ACPI_STATE_S0;
2551 for (; new_state <= ACPI_S_STATES_MAX + 1; new_state++)
2552 if (strcmp(sleep_state, sleep_state_names[new_state]) == 0)
2553 break;
2554 if (new_state <= ACPI_S_STATES_MAX + 1) {
2555 if (new_state != old_state)
2556 *(u_int *)oidp->oid_arg1 = new_state;
2557 } else
2558 error = EINVAL;
2559 }
2560
2561 return (error);
2562 }
2563
2564 /* Inform devctl(4) when we receive a Notify. */
2565 void
2566 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify)
2567 {
2568 char notify_buf[16];
2569 ACPI_BUFFER handle_buf;
2570 ACPI_STATUS status;
2571
2572 if (subsystem == NULL)
2573 return;
2574
2575 handle_buf.Pointer = NULL;
2576 handle_buf.Length = ACPI_ALLOCATE_BUFFER;
2577 status = AcpiNsHandleToPathname(h, &handle_buf);
2578 if (ACPI_FAILURE(status))
2579 return;
2580 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify);
2581 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf);
2582 AcpiOsFree(handle_buf.Pointer);
2583 }
2584
2585 #ifdef ACPI_DEBUG
2586 /*
2587 * Support for parsing debug options from the kernel environment.
2588 *
2589 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers
2590 * by specifying the names of the bits in the debug.acpi.layer and
2591 * debug.acpi.level environment variables. Bits may be unset by
2592 * prefixing the bit name with !.
2593 */
2594 struct debugtag
2595 {
2596 char *name;
2597 UINT32 value;
2598 };
2599
2600 static struct debugtag dbg_layer[] = {
2601 {"ACPI_UTILITIES", ACPI_UTILITIES},
2602 {"ACPI_HARDWARE", ACPI_HARDWARE},
2603 {"ACPI_EVENTS", ACPI_EVENTS},
2604 {"ACPI_TABLES", ACPI_TABLES},
2605 {"ACPI_NAMESPACE", ACPI_NAMESPACE},
2606 {"ACPI_PARSER", ACPI_PARSER},
2607 {"ACPI_DISPATCHER", ACPI_DISPATCHER},
2608 {"ACPI_EXECUTER", ACPI_EXECUTER},
2609 {"ACPI_RESOURCES", ACPI_RESOURCES},
2610 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER},
2611 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES},
2612 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER},
2613 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS},
2614
2615 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER},
2616 {"ACPI_BATTERY", ACPI_BATTERY},
2617 {"ACPI_BUS", ACPI_BUS},
2618 {"ACPI_BUTTON", ACPI_BUTTON},
2619 {"ACPI_EC", ACPI_EC},
2620 {"ACPI_FAN", ACPI_FAN},
2621 {"ACPI_POWERRES", ACPI_POWERRES},
2622 {"ACPI_PROCESSOR", ACPI_PROCESSOR},
2623 {"ACPI_THERMAL", ACPI_THERMAL},
2624 {"ACPI_TIMER", ACPI_TIMER},
2625 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS},
2626 {NULL, 0}
2627 };
2628
2629 static struct debugtag dbg_level[] = {
2630 {"ACPI_LV_ERROR", ACPI_LV_ERROR},
2631 {"ACPI_LV_WARN", ACPI_LV_WARN},
2632 {"ACPI_LV_INIT", ACPI_LV_INIT},
2633 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT},
2634 {"ACPI_LV_INFO", ACPI_LV_INFO},
2635 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS},
2636
2637 /* Trace verbosity level 1 [Standard Trace Level] */
2638 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES},
2639 {"ACPI_LV_PARSE", ACPI_LV_PARSE},
2640 {"ACPI_LV_LOAD", ACPI_LV_LOAD},
2641 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH},
2642 {"ACPI_LV_EXEC", ACPI_LV_EXEC},
2643 {"ACPI_LV_NAMES", ACPI_LV_NAMES},
2644 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION},
2645 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD},
2646 {"ACPI_LV_TABLES", ACPI_LV_TABLES},
2647 {"ACPI_LV_VALUES", ACPI_LV_VALUES},
2648 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS},
2649 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES},
2650 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS},
2651 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE},
2652 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1},
2653
2654 /* Trace verbosity level 2 [Function tracing and memory allocation] */
2655 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS},
2656 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS},
2657 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS},
2658 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2},
2659 {"ACPI_LV_ALL", ACPI_LV_ALL},
2660
2661 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */
2662 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX},
2663 {"ACPI_LV_THREADS", ACPI_LV_THREADS},
2664 {"ACPI_LV_IO", ACPI_LV_IO},
2665 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS},
2666 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3},
2667
2668 /* Exceptionally verbose output -- also used in the global "DebugLevel" */
2669 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE},
2670 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO},
2671 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES},
2672 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS},
2673 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE},
2674 {NULL, 0}
2675 };
2676
2677 static void
2678 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag)
2679 {
2680 char *ep;
2681 int i, l;
2682 int set;
2683
2684 while (*cp) {
2685 if (isspace(*cp)) {
2686 cp++;
2687 continue;
2688 }
2689 ep = cp;
2690 while (*ep && !isspace(*ep))
2691 ep++;
2692 if (*cp == '!') {
2693 set = 0;
2694 cp++;
2695 if (cp == ep)
2696 continue;
2697 } else {
2698 set = 1;
2699 }
2700 l = ep - cp;
2701 for (i = 0; tag[i].name != NULL; i++) {
2702 if (!strncmp(cp, tag[i].name, l)) {
2703 if (set)
2704 *flag |= tag[i].value;
2705 else
2706 *flag &= ~tag[i].value;
2707 }
2708 }
2709 cp = ep;
2710 }
2711 }
2712
2713 static void
2714 acpi_set_debugging(void *junk)
2715 {
2716 char *layer, *level;
2717
2718 if (cold) {
2719 AcpiDbgLayer = 0;
2720 AcpiDbgLevel = 0;
2721 }
2722
2723 layer = getenv("debug.acpi.layer");
2724 level = getenv("debug.acpi.level");
2725 if (layer == NULL && level == NULL)
2726 return;
2727
2728 printf("ACPI set debug");
2729 if (layer != NULL) {
2730 if (strcmp("NONE", layer) != 0)
2731 printf(" layer '%s'", layer);
2732 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer);
2733 freeenv(layer);
2734 }
2735 if (level != NULL) {
2736 if (strcmp("NONE", level) != 0)
2737 printf(" level '%s'", level);
2738 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel);
2739 freeenv(level);
2740 }
2741 printf("\n");
2742 }
2743
2744 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging,
2745 NULL);
2746
2747 static int
2748 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS)
2749 {
2750 int error, *dbg;
2751 struct debugtag *tag;
2752 struct sbuf sb;
2753
2754 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL)
2755 return (ENOMEM);
2756 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) {
2757 tag = &dbg_layer[0];
2758 dbg = &AcpiDbgLayer;
2759 } else {
2760 tag = &dbg_level[0];
2761 dbg = &AcpiDbgLevel;
2762 }
2763
2764 /* Get old values if this is a get request. */
2765 ACPI_SERIAL_BEGIN(acpi);
2766 if (*dbg == 0) {
2767 sbuf_cpy(&sb, "NONE");
2768 } else if (req->newptr == NULL) {
2769 for (; tag->name != NULL; tag++) {
2770 if ((*dbg & tag->value) == tag->value)
2771 sbuf_printf(&sb, "%s ", tag->name);
2772 }
2773 }
2774 sbuf_trim(&sb);
2775 sbuf_finish(&sb);
2776
2777 /* Copy out the old values to the user. */
2778 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb));
2779 sbuf_delete(&sb);
2780
2781 /* If the user is setting a string, parse it. */
2782 if (error == 0 && req->newptr != NULL) {
2783 *dbg = 0;
2784 setenv((char *)oidp->oid_arg1, (char *)req->newptr);
2785 acpi_set_debugging(NULL);
2786 }
2787 ACPI_SERIAL_END(acpi);
2788
2789 return (error);
2790 }
2791
2792 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING,
2793 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", "");
2794 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING,
2795 "debug.acpi.level", 0, acpi_debug_sysctl, "A", "");
2796 #endif /* ACPI_DEBUG */
2797
2798 static int
2799 acpi_pm_func(u_long cmd, void *arg, ...)
2800 {
2801 int state, acpi_state;
2802 int error;
2803 struct acpi_softc *sc;
2804 va_list ap;
2805
2806 error = 0;
2807 switch (cmd) {
2808 case POWER_CMD_SUSPEND:
2809 sc = (struct acpi_softc *)arg;
2810 if (sc == NULL) {
2811 error = EINVAL;
2812 goto out;
2813 }
2814
2815 va_start(ap, arg);
2816 state = va_arg(ap, int);
2817 va_end(ap);
2818
2819 switch (state) {
2820 case POWER_SLEEP_STATE_STANDBY:
2821 acpi_state = sc->acpi_standby_sx;
2822 break;
2823 case POWER_SLEEP_STATE_SUSPEND:
2824 acpi_state = sc->acpi_suspend_sx;
2825 break;
2826 case POWER_SLEEP_STATE_HIBERNATE:
2827 acpi_state = ACPI_STATE_S4;
2828 break;
2829 default:
2830 error = EINVAL;
2831 goto out;
2832 }
2833
2834 acpi_SetSleepState(sc, acpi_state);
2835 break;
2836 default:
2837 error = EINVAL;
2838 goto out;
2839 }
2840
2841 out:
2842 return (error);
2843 }
2844
2845 static void
2846 acpi_pm_register(void *arg)
2847 {
2848 if (!cold || resource_disabled("acpi", 0))
2849 return;
2850
2851 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL);
2852 }
2853
2854 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0);
Cache object: f72b9b98a398b48851c552ee8945db8a
|