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44#include <acpi/acpi.h>
45#include "accommon.h"
46#include "acevents.h"
47#include "acnamesp.h"
48#include "acinterp.h"
49
50#define _COMPONENT ACPI_EVENTS
51ACPI_MODULE_NAME("evmisc")
52
53
54static void ACPI_SYSTEM_XFACE acpi_ev_notify_dispatch(void *context);
55
56static u32 acpi_ev_global_lock_handler(void *context);
57
58static acpi_status acpi_ev_remove_global_lock_handler(void);
59
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73
74u8 acpi_ev_is_notify_object(struct acpi_namespace_node *node)
75{
76 switch (node->type) {
77 case ACPI_TYPE_DEVICE:
78 case ACPI_TYPE_PROCESSOR:
79 case ACPI_TYPE_THERMAL:
80
81
82
83 return (TRUE);
84
85 default:
86 return (FALSE);
87 }
88}
89
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102
103
104acpi_status
105acpi_ev_queue_notify_request(struct acpi_namespace_node * node,
106 u32 notify_value)
107{
108 union acpi_operand_object *obj_desc;
109 union acpi_operand_object *handler_obj = NULL;
110 union acpi_generic_state *notify_info;
111 acpi_status status = AE_OK;
112
113 ACPI_FUNCTION_NAME(ev_queue_notify_request);
114
115
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117
118
119
120
121
122 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
123 "Dispatching Notify on [%4.4s] Node %p Value 0x%2.2X (%s)\n",
124 acpi_ut_get_node_name(node), node, notify_value,
125 acpi_ut_get_notify_name(notify_value)));
126
127
128
129 obj_desc = acpi_ns_get_attached_object(node);
130 if (obj_desc) {
131
132
133
134 switch (node->type) {
135
136
137
138 case ACPI_TYPE_DEVICE:
139 case ACPI_TYPE_THERMAL:
140 case ACPI_TYPE_PROCESSOR:
141
142 if (notify_value <= ACPI_MAX_SYS_NOTIFY) {
143 handler_obj =
144 obj_desc->common_notify.system_notify;
145 } else {
146 handler_obj =
147 obj_desc->common_notify.device_notify;
148 }
149 break;
150
151 default:
152
153
154
155 return (AE_TYPE);
156 }
157 }
158
159
160
161
162
163
164
165
166 if ((acpi_gbl_system_notify.handler &&
167 (notify_value <= ACPI_MAX_SYS_NOTIFY)) ||
168 (acpi_gbl_device_notify.handler &&
169 (notify_value > ACPI_MAX_SYS_NOTIFY)) || handler_obj) {
170 notify_info = acpi_ut_create_generic_state();
171 if (!notify_info) {
172 return (AE_NO_MEMORY);
173 }
174
175 if (!handler_obj) {
176 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
177 "Executing system notify handler for Notify (%4.4s, %X) "
178 "node %p\n",
179 acpi_ut_get_node_name(node),
180 notify_value, node));
181 }
182
183 notify_info->common.descriptor_type =
184 ACPI_DESC_TYPE_STATE_NOTIFY;
185 notify_info->notify.node = node;
186 notify_info->notify.value = (u16) notify_value;
187 notify_info->notify.handler_obj = handler_obj;
188
189 status =
190 acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_ev_notify_dispatch,
191 notify_info);
192 if (ACPI_FAILURE(status)) {
193 acpi_ut_delete_generic_state(notify_info);
194 }
195 } else {
196
197
198 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
199 "No notify handler for Notify (%4.4s, %X) node %p\n",
200 acpi_ut_get_node_name(node), notify_value,
201 node));
202 }
203
204 return (status);
205}
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219
220static void ACPI_SYSTEM_XFACE acpi_ev_notify_dispatch(void *context)
221{
222 union acpi_generic_state *notify_info =
223 (union acpi_generic_state *)context;
224 acpi_notify_handler global_handler = NULL;
225 void *global_context = NULL;
226 union acpi_operand_object *handler_obj;
227
228 ACPI_FUNCTION_ENTRY();
229
230
231
232
233
234 if (notify_info->notify.value <= ACPI_MAX_SYS_NOTIFY) {
235
236
237
238 if (acpi_gbl_system_notify.handler) {
239 global_handler = acpi_gbl_system_notify.handler;
240 global_context = acpi_gbl_system_notify.context;
241 }
242 } else {
243
244
245 if (acpi_gbl_device_notify.handler) {
246 global_handler = acpi_gbl_device_notify.handler;
247 global_context = acpi_gbl_device_notify.context;
248 }
249 }
250
251
252
253 if (global_handler) {
254 global_handler(notify_info->notify.node,
255 notify_info->notify.value, global_context);
256 }
257
258
259
260 handler_obj = notify_info->notify.handler_obj;
261 if (handler_obj) {
262 handler_obj->notify.handler(notify_info->notify.node,
263 notify_info->notify.value,
264 handler_obj->notify.context);
265 }
266
267
268
269 acpi_ut_delete_generic_state(notify_info);
270}
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289
290static u32 acpi_ev_global_lock_handler(void *context)
291{
292 u8 acquired = FALSE;
293
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298
299
300 ACPI_ACQUIRE_GLOBAL_LOCK(acpi_gbl_FACS, acquired);
301 if (acquired) {
302
303
304
305 acpi_gbl_global_lock_acquired = TRUE;
306
307
308 if (ACPI_FAILURE
309 (acpi_os_signal_semaphore
310 (acpi_gbl_global_lock_semaphore, 1))) {
311 ACPI_ERROR((AE_INFO,
312 "Could not signal Global Lock semaphore"));
313 }
314 }
315
316 return (ACPI_INTERRUPT_HANDLED);
317}
318
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330
331acpi_status acpi_ev_init_global_lock_handler(void)
332{
333 acpi_status status;
334
335 ACPI_FUNCTION_TRACE(ev_init_global_lock_handler);
336
337
338
339 status = acpi_install_fixed_event_handler(ACPI_EVENT_GLOBAL,
340 acpi_ev_global_lock_handler,
341 NULL);
342
343
344
345
346
347
348
349 if (status == AE_NO_HARDWARE_RESPONSE) {
350 ACPI_ERROR((AE_INFO,
351 "No response from Global Lock hardware, disabling lock"));
352
353 acpi_gbl_global_lock_present = FALSE;
354 return_ACPI_STATUS(AE_OK);
355 }
356
357 acpi_gbl_global_lock_present = TRUE;
358 return_ACPI_STATUS(status);
359}
360
361
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371
372
373static acpi_status acpi_ev_remove_global_lock_handler(void)
374{
375 acpi_status status;
376
377 ACPI_FUNCTION_TRACE(ev_remove_global_lock_handler);
378
379 acpi_gbl_global_lock_present = FALSE;
380 status = acpi_remove_fixed_event_handler(ACPI_EVENT_GLOBAL,
381 acpi_ev_global_lock_handler);
382
383 return_ACPI_STATUS(status);
384}
385
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407static acpi_thread_id acpi_ev_global_lock_thread_id;
408static int acpi_ev_global_lock_acquired;
409
410acpi_status acpi_ev_acquire_global_lock(u16 timeout)
411{
412 acpi_status status = AE_OK;
413 u8 acquired = FALSE;
414
415 ACPI_FUNCTION_TRACE(ev_acquire_global_lock);
416
417
418
419
420
421 status = acpi_ex_system_wait_mutex(
422 acpi_gbl_global_lock_mutex->mutex.os_mutex, 0);
423 if (status == AE_TIME) {
424 if (acpi_ev_global_lock_thread_id == acpi_os_get_thread_id()) {
425 acpi_ev_global_lock_acquired++;
426 return AE_OK;
427 }
428 }
429
430 if (ACPI_FAILURE(status)) {
431 status = acpi_ex_system_wait_mutex(
432 acpi_gbl_global_lock_mutex->mutex.os_mutex,
433 timeout);
434 }
435 if (ACPI_FAILURE(status)) {
436 return_ACPI_STATUS(status);
437 }
438
439 acpi_ev_global_lock_thread_id = acpi_os_get_thread_id();
440 acpi_ev_global_lock_acquired++;
441
442
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448
449
450 acpi_gbl_global_lock_handle++;
451 if (acpi_gbl_global_lock_handle == 0) {
452 acpi_gbl_global_lock_handle = 1;
453 }
454
455
456
457
458
459 if (!acpi_gbl_global_lock_present) {
460 acpi_gbl_global_lock_acquired = TRUE;
461 return_ACPI_STATUS(AE_OK);
462 }
463
464
465
466 ACPI_ACQUIRE_GLOBAL_LOCK(acpi_gbl_FACS, acquired);
467 if (acquired) {
468
469
470
471 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
472 "Acquired hardware Global Lock\n"));
473
474 acpi_gbl_global_lock_acquired = TRUE;
475 return_ACPI_STATUS(AE_OK);
476 }
477
478
479
480
481
482 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Waiting for hardware Global Lock\n"));
483
484
485
486
487
488 status = acpi_ex_system_wait_semaphore(acpi_gbl_global_lock_semaphore,
489 ACPI_WAIT_FOREVER);
490
491 return_ACPI_STATUS(status);
492}
493
494
495
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505
506acpi_status acpi_ev_release_global_lock(void)
507{
508 u8 pending = FALSE;
509 acpi_status status = AE_OK;
510
511 ACPI_FUNCTION_TRACE(ev_release_global_lock);
512
513
514
515 if (!acpi_gbl_global_lock_acquired) {
516 ACPI_WARNING((AE_INFO,
517 "Cannot release the ACPI Global Lock, it has not been acquired"));
518 return_ACPI_STATUS(AE_NOT_ACQUIRED);
519 }
520
521 acpi_ev_global_lock_acquired--;
522 if (acpi_ev_global_lock_acquired > 0) {
523 return AE_OK;
524 }
525
526 if (acpi_gbl_global_lock_present) {
527
528
529
530 ACPI_RELEASE_GLOBAL_LOCK(acpi_gbl_FACS, pending);
531
532
533
534
535
536 if (pending) {
537 status =
538 acpi_write_bit_register
539 (ACPI_BITREG_GLOBAL_LOCK_RELEASE,
540 ACPI_ENABLE_EVENT);
541 }
542
543 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
544 "Released hardware Global Lock\n"));
545 }
546
547 acpi_gbl_global_lock_acquired = FALSE;
548
549
550 acpi_ev_global_lock_thread_id = NULL;
551 acpi_ev_global_lock_acquired = 0;
552 acpi_os_release_mutex(acpi_gbl_global_lock_mutex->mutex.os_mutex);
553 return_ACPI_STATUS(status);
554}
555
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566
567
568void acpi_ev_terminate(void)
569{
570 u32 i;
571 acpi_status status;
572
573 ACPI_FUNCTION_TRACE(ev_terminate);
574
575 if (acpi_gbl_events_initialized) {
576
577
578
579
580
581
582
583 for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) {
584 status = acpi_disable_event(i, 0);
585 if (ACPI_FAILURE(status)) {
586 ACPI_ERROR((AE_INFO,
587 "Could not disable fixed event %d",
588 (u32) i));
589 }
590 }
591
592
593
594 status = acpi_ev_walk_gpe_list(acpi_hw_disable_gpe_block, NULL);
595
596
597
598 status = acpi_ev_remove_sci_handler();
599 if (ACPI_FAILURE(status)) {
600 ACPI_ERROR((AE_INFO, "Could not remove SCI handler"));
601 }
602
603 status = acpi_ev_remove_global_lock_handler();
604 if (ACPI_FAILURE(status)) {
605 ACPI_ERROR((AE_INFO,
606 "Could not remove Global Lock handler"));
607 }
608 }
609
610
611
612 status = acpi_ev_walk_gpe_list(acpi_ev_delete_gpe_handlers, NULL);
613
614
615
616 if (acpi_gbl_original_mode == ACPI_SYS_MODE_LEGACY) {
617 status = acpi_disable();
618 if (ACPI_FAILURE(status)) {
619 ACPI_WARNING((AE_INFO, "AcpiDisable failed"));
620 }
621 }
622 return_VOID;
623}
624