blob: e4e9260cdc574b2f80758caee70d5dc1e744a3b8 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/******************************************************************************
2 *
3 * Module Name: evxface - External interfaces for ACPI events
4 *
5 *****************************************************************************/
6
7/*
Bob Moorec8100dc2016-01-15 08:17:03 +08008 * Copyright (C) 2000 - 2016, Intel Corp.
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions, and the following disclaimer,
16 * without modification.
17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18 * substantially similar to the "NO WARRANTY" disclaimer below
19 * ("Disclaimer") and any redistribution must be conditioned upon
20 * including a substantially similar Disclaimer requirement for further
21 * binary redistribution.
22 * 3. Neither the names of the above-listed copyright holders nor the names
23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
25 *
26 * Alternatively, this software may be distributed under the terms of the
27 * GNU General Public License ("GPL") version 2 as published by the Free
28 * Software Foundation.
29 *
30 * NO WARRANTY
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41 * POSSIBILITY OF SUCH DAMAGES.
42 */
43
Lv Zheng839e9282013-10-29 09:29:51 +080044#define EXPORT_ACPI_INTERFACES
45
Linus Torvalds1da177e2005-04-16 15:20:36 -070046#include <acpi/acpi.h>
Len Browne2f7a772009-01-09 00:30:03 -050047#include "accommon.h"
48#include "acnamesp.h"
49#include "acevents.h"
50#include "acinterp.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070051
52#define _COMPONENT ACPI_EVENTS
Len Brown4be44fc2005-08-05 00:44:28 -040053ACPI_MODULE_NAME("evxface")
Lv Zheng0d0988a2015-02-05 16:27:03 +080054#if (!ACPI_REDUCED_HARDWARE)
55/* Local prototypes */
56static acpi_status
57acpi_ev_install_gpe_handler(acpi_handle gpe_device,
58 u32 gpe_number,
59 u32 type,
60 u8 is_raw_handler,
61 acpi_gpe_handler address, void *context);
62
63#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070064
Linus Torvalds1da177e2005-04-16 15:20:36 -070065
66/*******************************************************************************
67 *
68 * FUNCTION: acpi_install_notify_handler
69 *
Lv Zheng75c80442012-12-19 05:36:49 +000070 * PARAMETERS: device - The device for which notifies will be handled
Linus Torvalds1da177e2005-04-16 15:20:36 -070071 * handler_type - The type of handler:
Bob Moore86ed4bc2012-05-03 11:08:19 +080072 * ACPI_SYSTEM_NOTIFY: System Handler (00-7F)
73 * ACPI_DEVICE_NOTIFY: Device Handler (80-FF)
74 * ACPI_ALL_NOTIFY: Both System and Device
Lv Zheng75c80442012-12-19 05:36:49 +000075 * handler - Address of the handler
76 * context - Value passed to the handler on each GPE
Linus Torvalds1da177e2005-04-16 15:20:36 -070077 *
78 * RETURN: Status
79 *
Bob Moore86ed4bc2012-05-03 11:08:19 +080080 * DESCRIPTION: Install a handler for notifications on an ACPI Device,
81 * thermal_zone, or Processor object.
82 *
83 * NOTES: The Root namespace object may have only one handler for each
84 * type of notify (System/Device). Device/Thermal/Processor objects
85 * may have one device notify handler, and multiple system notify
86 * handlers.
Linus Torvalds1da177e2005-04-16 15:20:36 -070087 *
88 ******************************************************************************/
Lv Zheng0d0988a2015-02-05 16:27:03 +080089
Linus Torvalds1da177e2005-04-16 15:20:36 -070090acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -040091acpi_install_notify_handler(acpi_handle device,
92 u32 handler_type,
93 acpi_notify_handler handler, void *context)
Linus Torvalds1da177e2005-04-16 15:20:36 -070094{
Bob Moore86ed4bc2012-05-03 11:08:19 +080095 struct acpi_namespace_node *node =
96 ACPI_CAST_PTR(struct acpi_namespace_node, device);
Len Brown4be44fc2005-08-05 00:44:28 -040097 union acpi_operand_object *obj_desc;
Bob Moore86ed4bc2012-05-03 11:08:19 +080098 union acpi_operand_object *handler_obj;
Len Brown4be44fc2005-08-05 00:44:28 -040099 acpi_status status;
Bob Moore86ed4bc2012-05-03 11:08:19 +0800100 u32 i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101
Bob Mooreb229cf92006-04-21 17:15:00 -0400102 ACPI_FUNCTION_TRACE(acpi_install_notify_handler);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103
104 /* Parameter validation */
105
Bob Moore86ed4bc2012-05-03 11:08:19 +0800106 if ((!device) || (!handler) || (!handler_type) ||
107 (handler_type > ACPI_MAX_NOTIFY_HANDLER_TYPE)) {
Len Brown4be44fc2005-08-05 00:44:28 -0400108 return_ACPI_STATUS(AE_BAD_PARAMETER);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109 }
110
Len Brown4be44fc2005-08-05 00:44:28 -0400111 status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
112 if (ACPI_FAILURE(status)) {
113 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114 }
115
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 /*
117 * Root Object:
118 * Registering a notify handler on the root object indicates that the
Bob Moore9f15fc62008-11-12 16:01:56 +0800119 * caller wishes to receive notifications for all objects. Note that
Bob Moore86ed4bc2012-05-03 11:08:19 +0800120 * only one global handler can be registered per notify type.
121 * Ensure that a handler is not already installed.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 */
123 if (device == ACPI_ROOT_OBJECT) {
Bob Moore86ed4bc2012-05-03 11:08:19 +0800124 for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) {
125 if (handler_type & (i + 1)) {
126 if (acpi_gbl_global_notify[i].handler) {
Rafael J. Wysocki3f0be672010-02-17 23:42:59 +0100127 status = AE_ALREADY_EXISTS;
128 goto unlock_and_exit;
129 }
130
Bob Moore86ed4bc2012-05-03 11:08:19 +0800131 acpi_gbl_global_notify[i].handler = handler;
132 acpi_gbl_global_notify[i].context = context;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133 }
134 }
135
Bob Moore86ed4bc2012-05-03 11:08:19 +0800136 goto unlock_and_exit; /* Global notify handler installed, all done */
137 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138
Bob Moore86ed4bc2012-05-03 11:08:19 +0800139 /*
140 * All Other Objects:
141 * Caller will only receive notifications specific to the target
142 * object. Note that only certain object types are allowed to
143 * receive notifications.
144 */
145
146 /* Are Notifies allowed on this object? */
147
148 if (!acpi_ev_is_notify_object(node)) {
149 status = AE_TYPE;
150 goto unlock_and_exit;
151 }
152
153 /* Check for an existing internal object, might not exist */
154
155 obj_desc = acpi_ns_get_attached_object(node);
156 if (!obj_desc) {
157
158 /* Create a new object */
159
160 obj_desc = acpi_ut_create_internal_object(node->type);
161 if (!obj_desc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 status = AE_NO_MEMORY;
163 goto unlock_and_exit;
164 }
165
Bob Moore86ed4bc2012-05-03 11:08:19 +0800166 /* Attach new object to the Node, remove local reference */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167
Bob Moore86ed4bc2012-05-03 11:08:19 +0800168 status = acpi_ns_attach_object(device, obj_desc, node->type);
169 acpi_ut_remove_reference(obj_desc);
170 if (ACPI_FAILURE(status)) {
171 goto unlock_and_exit;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172 }
173 }
174
Bob Moore86ed4bc2012-05-03 11:08:19 +0800175 /* Ensure that the handler is not already installed in the lists */
176
177 for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) {
178 if (handler_type & (i + 1)) {
179 handler_obj = obj_desc->common_notify.notify_list[i];
180 while (handler_obj) {
181 if (handler_obj->notify.handler == handler) {
182 status = AE_ALREADY_EXISTS;
183 goto unlock_and_exit;
184 }
185
186 handler_obj = handler_obj->notify.next[i];
187 }
188 }
189 }
190
191 /* Create and populate a new notify handler object */
192
193 handler_obj = acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_NOTIFY);
194 if (!handler_obj) {
195 status = AE_NO_MEMORY;
196 goto unlock_and_exit;
197 }
198
199 handler_obj->notify.node = node;
200 handler_obj->notify.handler_type = handler_type;
201 handler_obj->notify.handler = handler;
202 handler_obj->notify.context = context;
203
204 /* Install the handler at the list head(s) */
205
206 for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) {
207 if (handler_type & (i + 1)) {
208 handler_obj->notify.next[i] =
209 obj_desc->common_notify.notify_list[i];
210
211 obj_desc->common_notify.notify_list[i] = handler_obj;
212 }
213 }
214
215 /* Add an extra reference if handler was installed in both lists */
216
217 if (handler_type == ACPI_ALL_NOTIFY) {
218 acpi_ut_add_reference(handler_obj);
219 }
220
221unlock_and_exit:
Len Brown4be44fc2005-08-05 00:44:28 -0400222 (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
223 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225
Bob Moore83135242006-10-03 00:00:00 -0400226ACPI_EXPORT_SYMBOL(acpi_install_notify_handler)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227
228/*******************************************************************************
229 *
230 * FUNCTION: acpi_remove_notify_handler
231 *
Lv Zheng75c80442012-12-19 05:36:49 +0000232 * PARAMETERS: device - The device for which the handler is installed
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 * handler_type - The type of handler:
Bob Moore86ed4bc2012-05-03 11:08:19 +0800234 * ACPI_SYSTEM_NOTIFY: System Handler (00-7F)
235 * ACPI_DEVICE_NOTIFY: Device Handler (80-FF)
236 * ACPI_ALL_NOTIFY: Both System and Device
Lv Zheng75c80442012-12-19 05:36:49 +0000237 * handler - Address of the handler
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 *
239 * RETURN: Status
240 *
241 * DESCRIPTION: Remove a handler for notifies on an ACPI device
242 *
243 ******************************************************************************/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -0400245acpi_remove_notify_handler(acpi_handle device,
246 u32 handler_type, acpi_notify_handler handler)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247{
Bob Moore86ed4bc2012-05-03 11:08:19 +0800248 struct acpi_namespace_node *node =
249 ACPI_CAST_PTR(struct acpi_namespace_node, device);
Len Brown4be44fc2005-08-05 00:44:28 -0400250 union acpi_operand_object *obj_desc;
Bob Moore86ed4bc2012-05-03 11:08:19 +0800251 union acpi_operand_object *handler_obj;
252 union acpi_operand_object *previous_handler_obj;
Lv Zheng69c841b2014-04-04 12:37:51 +0800253 acpi_status status = AE_OK;
Bob Moore86ed4bc2012-05-03 11:08:19 +0800254 u32 i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255
Bob Mooreb229cf92006-04-21 17:15:00 -0400256 ACPI_FUNCTION_TRACE(acpi_remove_notify_handler);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257
258 /* Parameter validation */
259
Bob Moore86ed4bc2012-05-03 11:08:19 +0800260 if ((!device) || (!handler) || (!handler_type) ||
261 (handler_type > ACPI_MAX_NOTIFY_HANDLER_TYPE)) {
262 return_ACPI_STATUS(AE_BAD_PARAMETER);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 }
Lv Zheng3e8214e2012-12-19 05:37:15 +0000264
Bob Moore86ed4bc2012-05-03 11:08:19 +0800265 /* Root Object. Global handlers are removed here */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266
Bob Moore86ed4bc2012-05-03 11:08:19 +0800267 if (device == ACPI_ROOT_OBJECT) {
268 for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) {
269 if (handler_type & (i + 1)) {
Lv Zheng69c841b2014-04-04 12:37:51 +0800270 status =
271 acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
272 if (ACPI_FAILURE(status)) {
273 return_ACPI_STATUS(status);
274 }
275
Bob Moore86ed4bc2012-05-03 11:08:19 +0800276 if (!acpi_gbl_global_notify[i].handler ||
277 (acpi_gbl_global_notify[i].handler !=
278 handler)) {
279 status = AE_NOT_EXIST;
280 goto unlock_and_exit;
281 }
282
283 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
284 "Removing global notify handler\n"));
285
286 acpi_gbl_global_notify[i].handler = NULL;
287 acpi_gbl_global_notify[i].context = NULL;
Lv Zheng69c841b2014-04-04 12:37:51 +0800288
289 (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
290
291 /* Make sure all deferred notify tasks are completed */
292
293 acpi_os_wait_events_complete();
Bob Moore86ed4bc2012-05-03 11:08:19 +0800294 }
295 }
296
Lv Zheng69c841b2014-04-04 12:37:51 +0800297 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298 }
299
Bob Moore86ed4bc2012-05-03 11:08:19 +0800300 /* All other objects: Are Notifies allowed on this object? */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301
Bob Moore86ed4bc2012-05-03 11:08:19 +0800302 if (!acpi_ev_is_notify_object(node)) {
Lv Zheng69c841b2014-04-04 12:37:51 +0800303 return_ACPI_STATUS(AE_TYPE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 }
305
Bob Moore86ed4bc2012-05-03 11:08:19 +0800306 /* Must have an existing internal object */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307
Bob Moore86ed4bc2012-05-03 11:08:19 +0800308 obj_desc = acpi_ns_get_attached_object(node);
309 if (!obj_desc) {
Lv Zheng69c841b2014-04-04 12:37:51 +0800310 return_ACPI_STATUS(AE_NOT_EXIST);
Bob Moore86ed4bc2012-05-03 11:08:19 +0800311 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312
Bob Moore86ed4bc2012-05-03 11:08:19 +0800313 /* Internal object exists. Find the handler and remove it */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314
Bob Moore86ed4bc2012-05-03 11:08:19 +0800315 for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) {
316 if (handler_type & (i + 1)) {
Lv Zheng69c841b2014-04-04 12:37:51 +0800317 status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
318 if (ACPI_FAILURE(status)) {
319 return_ACPI_STATUS(status);
320 }
321
Bob Moore86ed4bc2012-05-03 11:08:19 +0800322 handler_obj = obj_desc->common_notify.notify_list[i];
323 previous_handler_obj = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324
Bob Moore86ed4bc2012-05-03 11:08:19 +0800325 /* Attempt to find the handler in the handler list */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326
Bob Moore86ed4bc2012-05-03 11:08:19 +0800327 while (handler_obj &&
328 (handler_obj->notify.handler != handler)) {
329 previous_handler_obj = handler_obj;
330 handler_obj = handler_obj->notify.next[i];
331 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332
Bob Moore86ed4bc2012-05-03 11:08:19 +0800333 if (!handler_obj) {
Bob Mooref6dd9222006-07-07 20:44:38 -0400334 status = AE_NOT_EXIST;
335 goto unlock_and_exit;
336 }
337
Bob Moore86ed4bc2012-05-03 11:08:19 +0800338 /* Remove the handler object from the list */
339
340 if (previous_handler_obj) { /* Handler is not at the list head */
341 previous_handler_obj->notify.next[i] =
342 handler_obj->notify.next[i];
343 } else { /* Handler is at the list head */
344
345 obj_desc->common_notify.notify_list[i] =
346 handler_obj->notify.next[i];
Rafael J. Wysocki3f0be672010-02-17 23:42:59 +0100347 }
348
Lv Zheng69c841b2014-04-04 12:37:51 +0800349 (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
350
351 /* Make sure all deferred notify tasks are completed */
352
353 acpi_os_wait_events_complete();
Bob Moore86ed4bc2012-05-03 11:08:19 +0800354 acpi_ut_remove_reference(handler_obj);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 }
356 }
357
Lv Zheng69c841b2014-04-04 12:37:51 +0800358 return_ACPI_STATUS(status);
359
Bob Moore86ed4bc2012-05-03 11:08:19 +0800360unlock_and_exit:
Len Brown4be44fc2005-08-05 00:44:28 -0400361 (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
362 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364
Bob Moore83135242006-10-03 00:00:00 -0400365ACPI_EXPORT_SYMBOL(acpi_remove_notify_handler)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366
367/*******************************************************************************
368 *
Bob Moore33620c52012-02-14 18:14:27 +0800369 * FUNCTION: acpi_install_exception_handler
370 *
Bob Mooreba494be2012-07-12 09:40:10 +0800371 * PARAMETERS: handler - Pointer to the handler function for the
Bob Moore33620c52012-02-14 18:14:27 +0800372 * event
373 *
374 * RETURN: Status
375 *
376 * DESCRIPTION: Saves the pointer to the handler function
377 *
378 ******************************************************************************/
379#ifdef ACPI_FUTURE_USAGE
380acpi_status acpi_install_exception_handler(acpi_exception_handler handler)
381{
382 acpi_status status;
383
384 ACPI_FUNCTION_TRACE(acpi_install_exception_handler);
385
386 status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
387 if (ACPI_FAILURE(status)) {
388 return_ACPI_STATUS(status);
389 }
390
391 /* Don't allow two handlers. */
392
393 if (acpi_gbl_exception_handler) {
394 status = AE_ALREADY_EXISTS;
395 goto cleanup;
396 }
397
398 /* Install the handler */
399
400 acpi_gbl_exception_handler = handler;
401
Lv Zheng10622bf2013-10-29 09:30:02 +0800402cleanup:
Bob Moore33620c52012-02-14 18:14:27 +0800403 (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
404 return_ACPI_STATUS(status);
405}
406
407ACPI_EXPORT_SYMBOL(acpi_install_exception_handler)
Lv Zheng4d946f72015-10-19 10:25:56 +0800408#endif
Bob Moore33620c52012-02-14 18:14:27 +0800409
410#if (!ACPI_REDUCED_HARDWARE)
411/*******************************************************************************
412 *
Lv Zhenga2fd4b42013-09-23 09:52:05 +0800413 * FUNCTION: acpi_install_sci_handler
414 *
415 * PARAMETERS: address - Address of the handler
416 * context - Value passed to the handler on each SCI
417 *
418 * RETURN: Status
419 *
420 * DESCRIPTION: Install a handler for a System Control Interrupt.
421 *
422 ******************************************************************************/
423acpi_status acpi_install_sci_handler(acpi_sci_handler address, void *context)
424{
425 struct acpi_sci_handler_info *new_sci_handler;
426 struct acpi_sci_handler_info *sci_handler;
427 acpi_cpu_flags flags;
428 acpi_status status;
429
430 ACPI_FUNCTION_TRACE(acpi_install_sci_handler);
431
432 if (!address) {
433 return_ACPI_STATUS(AE_BAD_PARAMETER);
434 }
435
436 /* Allocate and init a handler object */
437
438 new_sci_handler = ACPI_ALLOCATE(sizeof(struct acpi_sci_handler_info));
439 if (!new_sci_handler) {
440 return_ACPI_STATUS(AE_NO_MEMORY);
441 }
442
443 new_sci_handler->address = address;
444 new_sci_handler->context = context;
445
446 status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
447 if (ACPI_FAILURE(status)) {
448 goto exit;
449 }
450
451 /* Lock list during installation */
452
453 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
454 sci_handler = acpi_gbl_sci_handler_list;
455
456 /* Ensure handler does not already exist */
457
458 while (sci_handler) {
459 if (address == sci_handler->address) {
460 status = AE_ALREADY_EXISTS;
461 goto unlock_and_exit;
462 }
463
464 sci_handler = sci_handler->next;
465 }
466
467 /* Install the new handler into the global list (at head) */
468
469 new_sci_handler->next = acpi_gbl_sci_handler_list;
470 acpi_gbl_sci_handler_list = new_sci_handler;
471
Lv Zheng10622bf2013-10-29 09:30:02 +0800472unlock_and_exit:
Lv Zhenga2fd4b42013-09-23 09:52:05 +0800473
474 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
475 (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
476
Lv Zheng10622bf2013-10-29 09:30:02 +0800477exit:
Lv Zhenga2fd4b42013-09-23 09:52:05 +0800478 if (ACPI_FAILURE(status)) {
479 ACPI_FREE(new_sci_handler);
480 }
481 return_ACPI_STATUS(status);
482}
483
Bob Moore1d44efa2014-04-04 12:36:47 +0800484ACPI_EXPORT_SYMBOL(acpi_install_sci_handler)
485
Lv Zhenga2fd4b42013-09-23 09:52:05 +0800486/*******************************************************************************
487 *
488 * FUNCTION: acpi_remove_sci_handler
489 *
490 * PARAMETERS: address - Address of the handler
491 *
492 * RETURN: Status
493 *
494 * DESCRIPTION: Remove a handler for a System Control Interrupt.
495 *
496 ******************************************************************************/
Lv Zhenga2fd4b42013-09-23 09:52:05 +0800497acpi_status acpi_remove_sci_handler(acpi_sci_handler address)
498{
499 struct acpi_sci_handler_info *prev_sci_handler;
500 struct acpi_sci_handler_info *next_sci_handler;
501 acpi_cpu_flags flags;
502 acpi_status status;
503
504 ACPI_FUNCTION_TRACE(acpi_remove_sci_handler);
505
506 if (!address) {
507 return_ACPI_STATUS(AE_BAD_PARAMETER);
508 }
509
510 status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
511 if (ACPI_FAILURE(status)) {
512 return_ACPI_STATUS(status);
513 }
514
515 /* Remove the SCI handler with lock */
516
517 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
518
519 prev_sci_handler = NULL;
520 next_sci_handler = acpi_gbl_sci_handler_list;
521 while (next_sci_handler) {
522 if (next_sci_handler->address == address) {
523
524 /* Unlink and free the SCI handler info block */
525
526 if (prev_sci_handler) {
527 prev_sci_handler->next = next_sci_handler->next;
528 } else {
529 acpi_gbl_sci_handler_list =
530 next_sci_handler->next;
531 }
532
533 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
534 ACPI_FREE(next_sci_handler);
535 goto unlock_and_exit;
536 }
537
538 prev_sci_handler = next_sci_handler;
539 next_sci_handler = next_sci_handler->next;
540 }
541
542 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
543 status = AE_NOT_EXIST;
544
Lv Zheng10622bf2013-10-29 09:30:02 +0800545unlock_and_exit:
Lv Zhenga2fd4b42013-09-23 09:52:05 +0800546 (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
547 return_ACPI_STATUS(status);
548}
549
Bob Moore1d44efa2014-04-04 12:36:47 +0800550ACPI_EXPORT_SYMBOL(acpi_remove_sci_handler)
551
Lv Zhenga2fd4b42013-09-23 09:52:05 +0800552/*******************************************************************************
553 *
Bob Moore33620c52012-02-14 18:14:27 +0800554 * FUNCTION: acpi_install_global_event_handler
555 *
Bob Mooreba494be2012-07-12 09:40:10 +0800556 * PARAMETERS: handler - Pointer to the global event handler function
557 * context - Value passed to the handler on each event
Bob Moore33620c52012-02-14 18:14:27 +0800558 *
559 * RETURN: Status
560 *
561 * DESCRIPTION: Saves the pointer to the handler function. The global handler
562 * is invoked upon each incoming GPE and Fixed Event. It is
563 * invoked at interrupt level at the time of the event dispatch.
564 * Can be used to update event counters, etc.
565 *
566 ******************************************************************************/
567acpi_status
Lv Zheng644ef742012-10-31 02:25:36 +0000568acpi_install_global_event_handler(acpi_gbl_event_handler handler, void *context)
Bob Moore33620c52012-02-14 18:14:27 +0800569{
570 acpi_status status;
571
572 ACPI_FUNCTION_TRACE(acpi_install_global_event_handler);
573
574 /* Parameter validation */
575
576 if (!handler) {
577 return_ACPI_STATUS(AE_BAD_PARAMETER);
578 }
579
580 status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
581 if (ACPI_FAILURE(status)) {
582 return_ACPI_STATUS(status);
583 }
584
585 /* Don't allow two handlers. */
586
587 if (acpi_gbl_global_event_handler) {
588 status = AE_ALREADY_EXISTS;
589 goto cleanup;
590 }
591
592 acpi_gbl_global_event_handler = handler;
593 acpi_gbl_global_event_handler_context = context;
594
Lv Zheng10622bf2013-10-29 09:30:02 +0800595cleanup:
Bob Moore33620c52012-02-14 18:14:27 +0800596 (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
597 return_ACPI_STATUS(status);
598}
599
600ACPI_EXPORT_SYMBOL(acpi_install_global_event_handler)
601
602/*******************************************************************************
603 *
604 * FUNCTION: acpi_install_fixed_event_handler
605 *
Bob Mooreba494be2012-07-12 09:40:10 +0800606 * PARAMETERS: event - Event type to enable.
607 * handler - Pointer to the handler function for the
Bob Moore33620c52012-02-14 18:14:27 +0800608 * event
Bob Mooreba494be2012-07-12 09:40:10 +0800609 * context - Value passed to the handler on each GPE
Bob Moore33620c52012-02-14 18:14:27 +0800610 *
611 * RETURN: Status
612 *
613 * DESCRIPTION: Saves the pointer to the handler function and then enables the
614 * event.
615 *
616 ******************************************************************************/
617acpi_status
618acpi_install_fixed_event_handler(u32 event,
619 acpi_event_handler handler, void *context)
620{
621 acpi_status status;
622
623 ACPI_FUNCTION_TRACE(acpi_install_fixed_event_handler);
624
625 /* Parameter validation */
626
627 if (event > ACPI_EVENT_MAX) {
628 return_ACPI_STATUS(AE_BAD_PARAMETER);
629 }
630
631 status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
632 if (ACPI_FAILURE(status)) {
633 return_ACPI_STATUS(status);
634 }
635
Bob Moored4d32192013-03-08 09:21:41 +0000636 /* Do not allow multiple handlers */
Bob Moore33620c52012-02-14 18:14:27 +0800637
Bob Moored4d32192013-03-08 09:21:41 +0000638 if (acpi_gbl_fixed_event_handlers[event].handler) {
Bob Moore33620c52012-02-14 18:14:27 +0800639 status = AE_ALREADY_EXISTS;
640 goto cleanup;
641 }
642
643 /* Install the handler before enabling the event */
644
645 acpi_gbl_fixed_event_handlers[event].handler = handler;
646 acpi_gbl_fixed_event_handlers[event].context = context;
647
648 status = acpi_clear_event(event);
649 if (ACPI_SUCCESS(status))
650 status = acpi_enable_event(event, 0);
651 if (ACPI_FAILURE(status)) {
Bob Moored4d32192013-03-08 09:21:41 +0000652 ACPI_WARNING((AE_INFO,
653 "Could not enable fixed event - %s (%u)",
654 acpi_ut_get_event_name(event), event));
Bob Moore33620c52012-02-14 18:14:27 +0800655
656 /* Remove the handler */
657
658 acpi_gbl_fixed_event_handlers[event].handler = NULL;
659 acpi_gbl_fixed_event_handlers[event].context = NULL;
660 } else {
661 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
Bob Moored4d32192013-03-08 09:21:41 +0000662 "Enabled fixed event %s (%X), Handler=%p\n",
663 acpi_ut_get_event_name(event), event,
Bob Moore33620c52012-02-14 18:14:27 +0800664 handler));
665 }
666
Lv Zheng10622bf2013-10-29 09:30:02 +0800667cleanup:
Bob Moore33620c52012-02-14 18:14:27 +0800668 (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
669 return_ACPI_STATUS(status);
670}
671
672ACPI_EXPORT_SYMBOL(acpi_install_fixed_event_handler)
673
674/*******************************************************************************
675 *
676 * FUNCTION: acpi_remove_fixed_event_handler
677 *
Bob Mooreba494be2012-07-12 09:40:10 +0800678 * PARAMETERS: event - Event type to disable.
679 * handler - Address of the handler
Bob Moore33620c52012-02-14 18:14:27 +0800680 *
681 * RETURN: Status
682 *
683 * DESCRIPTION: Disables the event and unregisters the event handler.
684 *
685 ******************************************************************************/
686acpi_status
687acpi_remove_fixed_event_handler(u32 event, acpi_event_handler handler)
688{
689 acpi_status status = AE_OK;
690
691 ACPI_FUNCTION_TRACE(acpi_remove_fixed_event_handler);
692
693 /* Parameter validation */
694
695 if (event > ACPI_EVENT_MAX) {
696 return_ACPI_STATUS(AE_BAD_PARAMETER);
697 }
698
699 status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
700 if (ACPI_FAILURE(status)) {
701 return_ACPI_STATUS(status);
702 }
703
704 /* Disable the event before removing the handler */
705
706 status = acpi_disable_event(event, 0);
707
708 /* Always Remove the handler */
709
710 acpi_gbl_fixed_event_handlers[event].handler = NULL;
711 acpi_gbl_fixed_event_handlers[event].context = NULL;
712
713 if (ACPI_FAILURE(status)) {
714 ACPI_WARNING((AE_INFO,
Bob Moored4d32192013-03-08 09:21:41 +0000715 "Could not disable fixed event - %s (%u)",
716 acpi_ut_get_event_name(event), event));
Bob Moore33620c52012-02-14 18:14:27 +0800717 } else {
Bob Moored4d32192013-03-08 09:21:41 +0000718 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
719 "Disabled fixed event - %s (%X)\n",
720 acpi_ut_get_event_name(event), event));
Bob Moore33620c52012-02-14 18:14:27 +0800721 }
722
723 (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
724 return_ACPI_STATUS(status);
725}
726
727ACPI_EXPORT_SYMBOL(acpi_remove_fixed_event_handler)
728
729/*******************************************************************************
730 *
Lv Zheng0d0988a2015-02-05 16:27:03 +0800731 * FUNCTION: acpi_ev_install_gpe_handler
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732 *
Robert Moore44f6c012005-04-18 22:49:35 -0400733 * PARAMETERS: gpe_device - Namespace node for the GPE (NULL for FADT
734 * defined GPEs)
735 * gpe_number - The GPE number within the GPE block
Bob Mooreba494be2012-07-12 09:40:10 +0800736 * type - Whether this GPE should be treated as an
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737 * edge- or level-triggered interrupt.
Lv Zheng0d0988a2015-02-05 16:27:03 +0800738 * is_raw_handler - Whether this GPE should be handled using
739 * the special GPE handler mode.
Bob Mooreba494be2012-07-12 09:40:10 +0800740 * address - Address of the handler
741 * context - Value passed to the handler on each GPE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742 *
743 * RETURN: Status
744 *
Lv Zheng0d0988a2015-02-05 16:27:03 +0800745 * DESCRIPTION: Internal function to install a handler for a General Purpose
746 * Event.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700747 *
748 ******************************************************************************/
Lv Zheng0d0988a2015-02-05 16:27:03 +0800749static acpi_status
750acpi_ev_install_gpe_handler(acpi_handle gpe_device,
751 u32 gpe_number,
752 u32 type,
753 u8 is_raw_handler,
754 acpi_gpe_handler address, void *context)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700755{
Len Brown4be44fc2005-08-05 00:44:28 -0400756 struct acpi_gpe_event_info *gpe_event_info;
Lin Ming8b6cd8a2010-12-13 13:38:46 +0800757 struct acpi_gpe_handler_info *handler;
Len Brown4be44fc2005-08-05 00:44:28 -0400758 acpi_status status;
Bob Mooreb8e4d892006-01-27 16:43:00 -0500759 acpi_cpu_flags flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760
Lv Zheng0d0988a2015-02-05 16:27:03 +0800761 ACPI_FUNCTION_TRACE(ev_install_gpe_handler);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700762
763 /* Parameter validation */
764
Lin Ming0f849d22010-04-06 14:52:37 +0800765 if ((!address) || (type & ~ACPI_GPE_XRUPT_TYPE_MASK)) {
766 return_ACPI_STATUS(AE_BAD_PARAMETER);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767 }
768
Len Brown4be44fc2005-08-05 00:44:28 -0400769 status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
770 if (ACPI_FAILURE(status)) {
Lin Ming0f849d22010-04-06 14:52:37 +0800771 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772 }
773
Lv Zheng75c80442012-12-19 05:36:49 +0000774 /* Allocate and init handler object (before lock) */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775
Lin Ming8b6cd8a2010-12-13 13:38:46 +0800776 handler = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_handler_info));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777 if (!handler) {
778 status = AE_NO_MEMORY;
Bob Mooref6dd9222006-07-07 20:44:38 -0400779 goto unlock_and_exit;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700780 }
781
Rafael J. Wysocki28f4f8a2010-08-03 23:55:14 +0200782 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
783
784 /* Ensure that we have a valid GPE number */
785
786 gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
787 if (!gpe_event_info) {
788 status = AE_BAD_PARAMETER;
789 goto free_and_exit;
790 }
791
792 /* Make sure that there isn't a handler there already */
793
Lv Zheng0d0988a2015-02-05 16:27:03 +0800794 if ((ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
795 ACPI_GPE_DISPATCH_HANDLER) ||
796 (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
797 ACPI_GPE_DISPATCH_RAW_HANDLER)) {
Rafael J. Wysocki28f4f8a2010-08-03 23:55:14 +0200798 status = AE_ALREADY_EXISTS;
799 goto free_and_exit;
800 }
801
Len Brown4be44fc2005-08-05 00:44:28 -0400802 handler->address = address;
803 handler->context = context;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804 handler->method_node = gpe_event_info->dispatch.method_node;
Lv Zheng3e8214e2012-12-19 05:37:15 +0000805 handler->original_flags = (u8)(gpe_event_info->flags &
806 (ACPI_GPE_XRUPT_TYPE_MASK |
Lv Zhengf19f1a72014-10-10 10:39:39 +0800807 ACPI_GPE_DISPATCH_MASK));
Rafael J. Wysocki28f4f8a2010-08-03 23:55:14 +0200808
809 /*
Lv Zheng75c80442012-12-19 05:36:49 +0000810 * If the GPE is associated with a method, it may have been enabled
Rafael J. Wysockia2100802010-09-16 00:30:43 +0200811 * automatically during initialization, in which case it has to be
812 * disabled now to avoid spurious execution of the handler.
Rafael J. Wysocki28f4f8a2010-08-03 23:55:14 +0200813 */
Lv Zheng7c433122015-02-05 15:20:29 +0800814 if (((ACPI_GPE_DISPATCH_TYPE(handler->original_flags) ==
815 ACPI_GPE_DISPATCH_METHOD) ||
816 (ACPI_GPE_DISPATCH_TYPE(handler->original_flags) ==
817 ACPI_GPE_DISPATCH_NOTIFY)) && gpe_event_info->runtime_count) {
Lv Zheng437b7512014-10-10 10:39:45 +0800818 handler->originally_enabled = TRUE;
Lin Ming3a378982010-12-13 13:36:15 +0800819 (void)acpi_ev_remove_gpe_reference(gpe_event_info);
Lv Zheng437b7512014-10-10 10:39:45 +0800820
821 /* Sanity check of original type against new type */
822
823 if (type !=
824 (u32)(gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK)) {
825 ACPI_WARNING((AE_INFO,
826 "GPE type mismatch (level/edge)"));
827 }
Rafael J. Wysockia2100802010-09-16 00:30:43 +0200828 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830 /* Install the handler */
831
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832 gpe_event_info->dispatch.handler = handler;
833
Lv Zheng75c80442012-12-19 05:36:49 +0000834 /* Setup up dispatch flags to indicate handler (vs. method/notify) */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835
Bob Moored4913dc2009-03-06 10:05:18 +0800836 gpe_event_info->flags &=
837 ~(ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK);
Lv Zheng0d0988a2015-02-05 16:27:03 +0800838 gpe_event_info->flags |=
839 (u8)(type |
840 (is_raw_handler ? ACPI_GPE_DISPATCH_RAW_HANDLER :
841 ACPI_GPE_DISPATCH_HANDLER));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700842
Len Brown4be44fc2005-08-05 00:44:28 -0400843 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844
Lin Ming0f849d22010-04-06 14:52:37 +0800845unlock_and_exit:
Len Brown4be44fc2005-08-05 00:44:28 -0400846 (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
847 return_ACPI_STATUS(status);
Rafael J. Wysocki28f4f8a2010-08-03 23:55:14 +0200848
849free_and_exit:
850 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
851 ACPI_FREE(handler);
852 goto unlock_and_exit;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700854
Lv Zheng0d0988a2015-02-05 16:27:03 +0800855/*******************************************************************************
856 *
857 * FUNCTION: acpi_install_gpe_handler
858 *
859 * PARAMETERS: gpe_device - Namespace node for the GPE (NULL for FADT
860 * defined GPEs)
861 * gpe_number - The GPE number within the GPE block
862 * type - Whether this GPE should be treated as an
863 * edge- or level-triggered interrupt.
864 * address - Address of the handler
865 * context - Value passed to the handler on each GPE
866 *
867 * RETURN: Status
868 *
869 * DESCRIPTION: Install a handler for a General Purpose Event.
870 *
871 ******************************************************************************/
872
873acpi_status
874acpi_install_gpe_handler(acpi_handle gpe_device,
875 u32 gpe_number,
876 u32 type, acpi_gpe_handler address, void *context)
877{
878 acpi_status status;
879
880 ACPI_FUNCTION_TRACE(acpi_install_gpe_handler);
881
Bob Moore1fad8732015-12-29 13:54:36 +0800882 status = acpi_ev_install_gpe_handler(gpe_device, gpe_number, type,
883 FALSE, address, context);
Lv Zheng0d0988a2015-02-05 16:27:03 +0800884
885 return_ACPI_STATUS(status);
886}
887
Bob Moore83135242006-10-03 00:00:00 -0400888ACPI_EXPORT_SYMBOL(acpi_install_gpe_handler)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700889
890/*******************************************************************************
891 *
Lv Zheng0d0988a2015-02-05 16:27:03 +0800892 * FUNCTION: acpi_install_gpe_raw_handler
893 *
894 * PARAMETERS: gpe_device - Namespace node for the GPE (NULL for FADT
895 * defined GPEs)
896 * gpe_number - The GPE number within the GPE block
897 * type - Whether this GPE should be treated as an
898 * edge- or level-triggered interrupt.
899 * address - Address of the handler
900 * context - Value passed to the handler on each GPE
901 *
902 * RETURN: Status
903 *
904 * DESCRIPTION: Install a handler for a General Purpose Event.
905 *
906 ******************************************************************************/
907acpi_status
908acpi_install_gpe_raw_handler(acpi_handle gpe_device,
909 u32 gpe_number,
910 u32 type, acpi_gpe_handler address, void *context)
911{
912 acpi_status status;
913
914 ACPI_FUNCTION_TRACE(acpi_install_gpe_raw_handler);
915
Bob Moore1fad8732015-12-29 13:54:36 +0800916 status = acpi_ev_install_gpe_handler(gpe_device, gpe_number, type,
917 TRUE, address, context);
Lv Zheng0d0988a2015-02-05 16:27:03 +0800918
919 return_ACPI_STATUS(status);
920}
921
922ACPI_EXPORT_SYMBOL(acpi_install_gpe_raw_handler)
923
924/*******************************************************************************
925 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700926 * FUNCTION: acpi_remove_gpe_handler
927 *
Robert Moore44f6c012005-04-18 22:49:35 -0400928 * PARAMETERS: gpe_device - Namespace node for the GPE (NULL for FADT
929 * defined GPEs)
930 * gpe_number - The event to remove a handler
Bob Mooreba494be2012-07-12 09:40:10 +0800931 * address - Address of the handler
Linus Torvalds1da177e2005-04-16 15:20:36 -0700932 *
933 * RETURN: Status
934 *
935 * DESCRIPTION: Remove a handler for a General Purpose acpi_event.
936 *
937 ******************************************************************************/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -0400939acpi_remove_gpe_handler(acpi_handle gpe_device,
Lin Ming8b6cd8a2010-12-13 13:38:46 +0800940 u32 gpe_number, acpi_gpe_handler address)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941{
Len Brown4be44fc2005-08-05 00:44:28 -0400942 struct acpi_gpe_event_info *gpe_event_info;
Lin Ming8b6cd8a2010-12-13 13:38:46 +0800943 struct acpi_gpe_handler_info *handler;
Len Brown4be44fc2005-08-05 00:44:28 -0400944 acpi_status status;
Bob Mooreb8e4d892006-01-27 16:43:00 -0500945 acpi_cpu_flags flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700946
Bob Mooreb229cf92006-04-21 17:15:00 -0400947 ACPI_FUNCTION_TRACE(acpi_remove_gpe_handler);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700948
949 /* Parameter validation */
950
951 if (!address) {
Len Brown4be44fc2005-08-05 00:44:28 -0400952 return_ACPI_STATUS(AE_BAD_PARAMETER);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700953 }
954
Len Brown4be44fc2005-08-05 00:44:28 -0400955 status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
956 if (ACPI_FAILURE(status)) {
957 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700958 }
959
Rafael J. Wysocki28f4f8a2010-08-03 23:55:14 +0200960 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
961
Linus Torvalds1da177e2005-04-16 15:20:36 -0700962 /* Ensure that we have a valid GPE number */
963
Len Brown4be44fc2005-08-05 00:44:28 -0400964 gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700965 if (!gpe_event_info) {
966 status = AE_BAD_PARAMETER;
967 goto unlock_and_exit;
968 }
969
970 /* Make sure that a handler is indeed installed */
971
Lv Zheng0d0988a2015-02-05 16:27:03 +0800972 if ((ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) !=
973 ACPI_GPE_DISPATCH_HANDLER) &&
974 (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) !=
975 ACPI_GPE_DISPATCH_RAW_HANDLER)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700976 status = AE_NOT_EXIST;
977 goto unlock_and_exit;
978 }
979
980 /* Make sure that the installed handler is the same */
981
982 if (gpe_event_info->dispatch.handler->address != address) {
983 status = AE_BAD_PARAMETER;
984 goto unlock_and_exit;
985 }
986
Linus Torvalds1da177e2005-04-16 15:20:36 -0700987 /* Remove the handler */
988
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989 handler = gpe_event_info->dispatch.handler;
Lv Zhengc5392512015-02-05 15:20:14 +0800990 gpe_event_info->dispatch.handler = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991
992 /* Restore Method node (if any), set dispatch flags */
993
994 gpe_event_info->dispatch.method_node = handler->method_node;
Rafael J. Wysocki28f4f8a2010-08-03 23:55:14 +0200995 gpe_event_info->flags &=
Lv Zhengf19f1a72014-10-10 10:39:39 +0800996 ~(ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK);
Lin Ming3a378982010-12-13 13:36:15 +0800997 gpe_event_info->flags |= handler->original_flags;
Rafael J. Wysocki28f4f8a2010-08-03 23:55:14 +0200998
999 /*
Rafael J. Wysockia2100802010-09-16 00:30:43 +02001000 * If the GPE was previously associated with a method and it was
1001 * enabled, it should be enabled at this point to restore the
1002 * post-initialization configuration.
Rafael J. Wysocki28f4f8a2010-08-03 23:55:14 +02001003 */
Lv Zheng7c433122015-02-05 15:20:29 +08001004 if (((ACPI_GPE_DISPATCH_TYPE(handler->original_flags) ==
1005 ACPI_GPE_DISPATCH_METHOD) ||
1006 (ACPI_GPE_DISPATCH_TYPE(handler->original_flags) ==
1007 ACPI_GPE_DISPATCH_NOTIFY)) && handler->originally_enabled) {
Lin Ming3a378982010-12-13 13:36:15 +08001008 (void)acpi_ev_add_gpe_reference(gpe_event_info);
Lv Zheng3e8214e2012-12-19 05:37:15 +00001009 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001010
Lv Zheng69c841b2014-04-04 12:37:51 +08001011 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
1012 (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
1013
1014 /* Make sure all deferred GPE tasks are completed */
1015
1016 acpi_os_wait_events_complete();
1017
Linus Torvalds1da177e2005-04-16 15:20:36 -07001018 /* Now we can free the handler object */
1019
Bob Moore83135242006-10-03 00:00:00 -04001020 ACPI_FREE(handler);
Lv Zheng69c841b2014-04-04 12:37:51 +08001021 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001022
Rafael J. Wysocki28f4f8a2010-08-03 23:55:14 +02001023unlock_and_exit:
1024 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
1025
Len Brown4be44fc2005-08-05 00:44:28 -04001026 (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
1027 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001028}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001029
Bob Moore83135242006-10-03 00:00:00 -04001030ACPI_EXPORT_SYMBOL(acpi_remove_gpe_handler)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001031
1032/*******************************************************************************
1033 *
1034 * FUNCTION: acpi_acquire_global_lock
1035 *
Bob Mooreba494be2012-07-12 09:40:10 +08001036 * PARAMETERS: timeout - How long the caller is willing to wait
1037 * handle - Where the handle to the lock is returned
Robert Moore44f6c012005-04-18 22:49:35 -04001038 * (if acquired)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001039 *
1040 * RETURN: Status
1041 *
1042 * DESCRIPTION: Acquire the ACPI Global Lock
1043 *
Bob Mooreba886cd2008-04-10 19:06:37 +04001044 * Note: Allows callers with the same thread ID to acquire the global lock
1045 * multiple times. In other words, externally, the behavior of the global lock
1046 * is identical to an AML mutex. On the first acquire, a new handle is
1047 * returned. On any subsequent calls to acquire by the same thread, the same
1048 * handle is returned.
1049 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001050 ******************************************************************************/
Lv Zhengf19f1a72014-10-10 10:39:39 +08001051acpi_status acpi_acquire_global_lock(u16 timeout, u32 *handle)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001052{
Len Brown4be44fc2005-08-05 00:44:28 -04001053 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001054
1055 if (!handle) {
1056 return (AE_BAD_PARAMETER);
1057 }
1058
Len Brown4d2acd92007-05-09 22:56:38 -04001059 /* Must lock interpreter to prevent race conditions */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001060
Len Brown4d2acd92007-05-09 22:56:38 -04001061 acpi_ex_enter_interpreter();
Bob Mooreba886cd2008-04-10 19:06:37 +04001062
1063 status = acpi_ex_acquire_mutex_object(timeout,
1064 acpi_gbl_global_lock_mutex,
1065 acpi_os_get_thread_id());
Linus Torvalds1da177e2005-04-16 15:20:36 -07001066
Len Brown4be44fc2005-08-05 00:44:28 -04001067 if (ACPI_SUCCESS(status)) {
Bob Mooreba886cd2008-04-10 19:06:37 +04001068
Bob Mooree5567af2008-04-10 19:06:38 +04001069 /* Return the global lock handle (updated in acpi_ev_acquire_global_lock) */
Bob Mooreba886cd2008-04-10 19:06:37 +04001070
Linus Torvalds1da177e2005-04-16 15:20:36 -07001071 *handle = acpi_gbl_global_lock_handle;
1072 }
1073
Bob Mooreba886cd2008-04-10 19:06:37 +04001074 acpi_ex_exit_interpreter();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001075 return (status);
1076}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001077
Bob Moore83135242006-10-03 00:00:00 -04001078ACPI_EXPORT_SYMBOL(acpi_acquire_global_lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001079
1080/*******************************************************************************
1081 *
1082 * FUNCTION: acpi_release_global_lock
1083 *
Bob Mooreba494be2012-07-12 09:40:10 +08001084 * PARAMETERS: handle - Returned from acpi_acquire_global_lock
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085 *
1086 * RETURN: Status
1087 *
Robert Moore44f6c012005-04-18 22:49:35 -04001088 * DESCRIPTION: Release the ACPI Global Lock. The handle must be valid.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001089 *
1090 ******************************************************************************/
Len Brown4be44fc2005-08-05 00:44:28 -04001091acpi_status acpi_release_global_lock(u32 handle)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001092{
Len Brown4be44fc2005-08-05 00:44:28 -04001093 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001094
Bob Mooref02e9fa2008-04-10 19:06:37 +04001095 if (!handle || (handle != acpi_gbl_global_lock_handle)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001096 return (AE_NOT_ACQUIRED);
1097 }
1098
Bob Mooreba886cd2008-04-10 19:06:37 +04001099 status = acpi_ex_release_mutex_object(acpi_gbl_global_lock_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100 return (status);
1101}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001102
Bob Moore83135242006-10-03 00:00:00 -04001103ACPI_EXPORT_SYMBOL(acpi_release_global_lock)
Bob Moore33620c52012-02-14 18:14:27 +08001104#endif /* !ACPI_REDUCED_HARDWARE */