blob: afbd5cb391f671eeedef586c3c6aa515fd8eba62 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/******************************************************************************
2 *
3 * Module Name: evgpe - General Purpose Event handling and dispatch
4 *
5 *****************************************************************************/
6
7/*
Bob Moore77848132012-01-12 13:27:23 +08008 * Copyright (C) 2000 - 2012, 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
44#include <acpi/acpi.h>
Len Browne2f7a772009-01-09 00:30:03 -050045#include "accommon.h"
46#include "acevents.h"
47#include "acnamesp.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070048
49#define _COMPONENT ACPI_EVENTS
Len Brown4be44fc2005-08-05 00:44:28 -040050ACPI_MODULE_NAME("evgpe")
Bob Moore33620c52012-02-14 18:14:27 +080051#if (!ACPI_REDUCED_HARDWARE) /* Entire module */
Robert Moore44f6c012005-04-18 22:49:35 -040052/* Local prototypes */
Len Brown4be44fc2005-08-05 00:44:28 -040053static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context);
Linus Torvalds1da177e2005-04-16 15:20:36 -070054
Lin Ming5a284cd2010-12-13 13:39:07 +080055static void ACPI_SYSTEM_XFACE acpi_ev_asynch_enable_gpe(void *context);
56
Linus Torvalds1da177e2005-04-16 15:20:36 -070057/*******************************************************************************
58 *
Rafael J. Wysockia44061a2010-07-01 10:11:45 +080059 * FUNCTION: acpi_ev_update_gpe_enable_mask
Linus Torvalds1da177e2005-04-16 15:20:36 -070060 *
61 * PARAMETERS: gpe_event_info - GPE to update
Linus Torvalds1da177e2005-04-16 15:20:36 -070062 *
63 * RETURN: Status
64 *
Rafael J. Wysockia44061a2010-07-01 10:11:45 +080065 * DESCRIPTION: Updates GPE register enable mask based upon whether there are
66 * runtime references to this GPE
Linus Torvalds1da177e2005-04-16 15:20:36 -070067 *
68 ******************************************************************************/
69
70acpi_status
Rafael J. Wysockia44061a2010-07-01 10:11:45 +080071acpi_ev_update_gpe_enable_mask(struct acpi_gpe_event_info *gpe_event_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -070072{
Len Brown4be44fc2005-08-05 00:44:28 -040073 struct acpi_gpe_register_info *gpe_register_info;
Rafael J. Wysockie4e9a732010-06-08 10:48:26 +020074 u32 register_bit;
Linus Torvalds1da177e2005-04-16 15:20:36 -070075
Rafael J. Wysockia44061a2010-07-01 10:11:45 +080076 ACPI_FUNCTION_TRACE(ev_update_gpe_enable_mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -070077
78 gpe_register_info = gpe_event_info->register_info;
79 if (!gpe_register_info) {
Len Brown4be44fc2005-08-05 00:44:28 -040080 return_ACPI_STATUS(AE_NOT_EXIST);
Linus Torvalds1da177e2005-04-16 15:20:36 -070081 }
Bob Moored4913dc2009-03-06 10:05:18 +080082
Lin Mingb76df672010-07-01 10:07:17 +080083 register_bit = acpi_hw_get_gpe_register_bit(gpe_event_info,
Rafael J. Wysockie4e9a732010-06-08 10:48:26 +020084 gpe_register_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -070085
Rafael J. Wysockia44061a2010-07-01 10:11:45 +080086 /* Clear the run bit up front */
Lin Ming0f849d22010-04-06 14:52:37 +080087
Rafael J. Wysocki9630bdd2010-02-17 23:41:07 +010088 ACPI_CLEAR_BIT(gpe_register_info->enable_for_run, register_bit);
Linus Torvalds1da177e2005-04-16 15:20:36 -070089
Rafael J. Wysockia44061a2010-07-01 10:11:45 +080090 /* Set the mask bit only if there are references to this GPE */
Linus Torvalds1da177e2005-04-16 15:20:36 -070091
Lin Ming0f849d22010-04-06 14:52:37 +080092 if (gpe_event_info->runtime_count) {
Rafael J. Wysockia44061a2010-07-01 10:11:45 +080093 ACPI_SET_BIT(gpe_register_info->enable_for_run, (u8)register_bit);
Lin Ming0f849d22010-04-06 14:52:37 +080094 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070095
Len Brown4be44fc2005-08-05 00:44:28 -040096 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -070097}
98
Rafael J. Wysocki3bd741b2010-07-01 11:01:12 +080099/*******************************************************************************
100 *
101 * FUNCTION: acpi_ev_enable_gpe
102 *
103 * PARAMETERS: gpe_event_info - GPE to enable
104 *
105 * RETURN: Status
106 *
Lin Mingda503372010-12-13 13:39:37 +0800107 * DESCRIPTION: Clear a GPE of stale events and enable it.
Rafael J. Wysocki3bd741b2010-07-01 11:01:12 +0800108 *
109 ******************************************************************************/
110acpi_status
111acpi_ev_enable_gpe(struct acpi_gpe_event_info *gpe_event_info)
112{
113 acpi_status status;
114
115 ACPI_FUNCTION_TRACE(ev_enable_gpe);
116
117 /*
Lin Mingbba63a22010-12-13 13:39:17 +0800118 * We will only allow a GPE to be enabled if it has either an associated
119 * method (_Lxx/_Exx) or a handler, or is using the implicit notify
120 * feature. Otherwise, the GPE will be immediately disabled by
121 * acpi_ev_gpe_dispatch the first time it fires.
Rafael J. Wysocki3bd741b2010-07-01 11:01:12 +0800122 */
Lin Mingbba63a22010-12-13 13:39:17 +0800123 if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
124 ACPI_GPE_DISPATCH_NONE) {
Rafael J. Wysocki3bd741b2010-07-01 11:01:12 +0800125 return_ACPI_STATUS(AE_NO_HANDLER);
126 }
127
128 /* Clear the GPE (of stale events) */
129 status = acpi_hw_clear_gpe(gpe_event_info);
130 if (ACPI_FAILURE(status)) {
131 return_ACPI_STATUS(status);
132 }
133
134 /* Enable the requested GPE */
135 status = acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_ENABLE);
136
137 return_ACPI_STATUS(status);
138}
139
Lin Ming0f849d22010-04-06 14:52:37 +0800140
141/*******************************************************************************
142 *
Lin Ming3a378982010-12-13 13:36:15 +0800143 * FUNCTION: acpi_ev_add_gpe_reference
Rafael J. Wysocki28f4f8a2010-08-03 23:55:14 +0200144 *
Lin Mingda503372010-12-13 13:39:37 +0800145 * PARAMETERS: gpe_event_info - Add a reference to this GPE
Rafael J. Wysocki28f4f8a2010-08-03 23:55:14 +0200146 *
147 * RETURN: Status
148 *
149 * DESCRIPTION: Add a reference to a GPE. On the first reference, the GPE is
150 * hardware-enabled.
151 *
152 ******************************************************************************/
153
Lin Ming3a378982010-12-13 13:36:15 +0800154acpi_status acpi_ev_add_gpe_reference(struct acpi_gpe_event_info *gpe_event_info)
Rafael J. Wysocki28f4f8a2010-08-03 23:55:14 +0200155{
156 acpi_status status = AE_OK;
157
Lin Ming3a378982010-12-13 13:36:15 +0800158 ACPI_FUNCTION_TRACE(ev_add_gpe_reference);
159
Rafael J. Wysocki28f4f8a2010-08-03 23:55:14 +0200160 if (gpe_event_info->runtime_count == ACPI_UINT8_MAX) {
161 return_ACPI_STATUS(AE_LIMIT);
162 }
163
164 gpe_event_info->runtime_count++;
165 if (gpe_event_info->runtime_count == 1) {
Lin Mingda503372010-12-13 13:39:37 +0800166
167 /* Enable on first reference */
168
Rafael J. Wysocki28f4f8a2010-08-03 23:55:14 +0200169 status = acpi_ev_update_gpe_enable_mask(gpe_event_info);
170 if (ACPI_SUCCESS(status)) {
171 status = acpi_ev_enable_gpe(gpe_event_info);
172 }
173
174 if (ACPI_FAILURE(status)) {
175 gpe_event_info->runtime_count--;
176 }
177 }
178
179 return_ACPI_STATUS(status);
180}
181
182/*******************************************************************************
183 *
Lin Ming3a378982010-12-13 13:36:15 +0800184 * FUNCTION: acpi_ev_remove_gpe_reference
Rafael J. Wysocki28f4f8a2010-08-03 23:55:14 +0200185 *
Lin Mingda503372010-12-13 13:39:37 +0800186 * PARAMETERS: gpe_event_info - Remove a reference to this GPE
Rafael J. Wysocki28f4f8a2010-08-03 23:55:14 +0200187 *
188 * RETURN: Status
189 *
190 * DESCRIPTION: Remove a reference to a GPE. When the last reference is
191 * removed, the GPE is hardware-disabled.
192 *
193 ******************************************************************************/
194
Lin Ming3a378982010-12-13 13:36:15 +0800195acpi_status acpi_ev_remove_gpe_reference(struct acpi_gpe_event_info *gpe_event_info)
Rafael J. Wysocki28f4f8a2010-08-03 23:55:14 +0200196{
197 acpi_status status = AE_OK;
198
Lin Ming3a378982010-12-13 13:36:15 +0800199 ACPI_FUNCTION_TRACE(ev_remove_gpe_reference);
200
Rafael J. Wysocki28f4f8a2010-08-03 23:55:14 +0200201 if (!gpe_event_info->runtime_count) {
202 return_ACPI_STATUS(AE_LIMIT);
203 }
204
205 gpe_event_info->runtime_count--;
206 if (!gpe_event_info->runtime_count) {
Lin Mingda503372010-12-13 13:39:37 +0800207
208 /* Disable on last reference */
209
Rafael J. Wysocki28f4f8a2010-08-03 23:55:14 +0200210 status = acpi_ev_update_gpe_enable_mask(gpe_event_info);
211 if (ACPI_SUCCESS(status)) {
212 status = acpi_hw_low_set_gpe(gpe_event_info,
213 ACPI_GPE_DISABLE);
214 }
215
216 if (ACPI_FAILURE(status)) {
217 gpe_event_info->runtime_count++;
218 }
219 }
220
221 return_ACPI_STATUS(status);
222}
223
224/*******************************************************************************
225 *
Lin Ming0f849d22010-04-06 14:52:37 +0800226 * FUNCTION: acpi_ev_low_get_gpe_info
227 *
228 * PARAMETERS: gpe_number - Raw GPE number
229 * gpe_block - A GPE info block
230 *
231 * RETURN: A GPE event_info struct. NULL if not a valid GPE (The gpe_number
232 * is not within the specified GPE block)
233 *
234 * DESCRIPTION: Returns the event_info struct associated with this GPE. This is
235 * the low-level implementation of ev_get_gpe_event_info.
236 *
237 ******************************************************************************/
238
239struct acpi_gpe_event_info *acpi_ev_low_get_gpe_info(u32 gpe_number,
240 struct acpi_gpe_block_info
241 *gpe_block)
242{
243 u32 gpe_index;
244
245 /*
246 * Validate that the gpe_number is within the specified gpe_block.
247 * (Two steps)
248 */
249 if (!gpe_block || (gpe_number < gpe_block->block_base_number)) {
250 return (NULL);
251 }
252
253 gpe_index = gpe_number - gpe_block->block_base_number;
254 if (gpe_index >= gpe_block->gpe_count) {
255 return (NULL);
256 }
257
258 return (&gpe_block->event_info[gpe_index]);
259}
260
261
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262/*******************************************************************************
263 *
264 * FUNCTION: acpi_ev_get_gpe_event_info
265 *
Bob Moore9f15fc62008-11-12 16:01:56 +0800266 * PARAMETERS: gpe_device - Device node. NULL for GPE0/GPE1
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 * gpe_number - Raw GPE number
268 *
269 * RETURN: A GPE event_info struct. NULL if not a valid GPE
270 *
271 * DESCRIPTION: Returns the event_info struct associated with this GPE.
272 * Validates the gpe_block and the gpe_number
273 *
274 * Should be called only when the GPE lists are semaphore locked
275 * and not subject to change.
276 *
277 ******************************************************************************/
278
Len Brown4be44fc2005-08-05 00:44:28 -0400279struct acpi_gpe_event_info *acpi_ev_get_gpe_event_info(acpi_handle gpe_device,
280 u32 gpe_number)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281{
Len Brown4be44fc2005-08-05 00:44:28 -0400282 union acpi_operand_object *obj_desc;
Lin Ming0f849d22010-04-06 14:52:37 +0800283 struct acpi_gpe_event_info *gpe_info;
Bob Moore67a119f2008-06-10 13:42:13 +0800284 u32 i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285
Len Brown4be44fc2005-08-05 00:44:28 -0400286 ACPI_FUNCTION_ENTRY();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287
Bob Moore186c3072010-04-27 11:32:28 +0800288 /* A NULL gpe_device means use the FADT-defined GPE block(s) */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289
290 if (!gpe_device) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400291
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292 /* Examine GPE Block 0 and 1 (These blocks are permanent) */
293
294 for (i = 0; i < ACPI_MAX_GPE_BLOCKS; i++) {
Lin Ming0f849d22010-04-06 14:52:37 +0800295 gpe_info = acpi_ev_low_get_gpe_info(gpe_number,
296 acpi_gbl_gpe_fadt_blocks
297 [i]);
298 if (gpe_info) {
299 return (gpe_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 }
301 }
302
303 /* The gpe_number was not in the range of either FADT GPE block */
304
305 return (NULL);
306 }
307
308 /* A Non-NULL gpe_device means this is a GPE Block Device */
309
Len Brownfd350942007-05-09 23:34:35 -0400310 obj_desc = acpi_ns_get_attached_object((struct acpi_namespace_node *)
311 gpe_device);
Len Brown4be44fc2005-08-05 00:44:28 -0400312 if (!obj_desc || !obj_desc->device.gpe_block) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313 return (NULL);
314 }
315
Lin Ming0f849d22010-04-06 14:52:37 +0800316 return (acpi_ev_low_get_gpe_info
317 (gpe_number, obj_desc->device.gpe_block));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318}
319
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320/*******************************************************************************
321 *
322 * FUNCTION: acpi_ev_gpe_detect
323 *
324 * PARAMETERS: gpe_xrupt_list - Interrupt block for this interrupt.
325 * Can have multiple GPE blocks attached.
326 *
327 * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
328 *
Bob Moore9f15fc62008-11-12 16:01:56 +0800329 * DESCRIPTION: Detect if any GP events have occurred. This function is
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330 * executed at interrupt level.
331 *
332 ******************************************************************************/
333
Len Brown4be44fc2005-08-05 00:44:28 -0400334u32 acpi_ev_gpe_detect(struct acpi_gpe_xrupt_info * gpe_xrupt_list)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335{
Len Brown4be44fc2005-08-05 00:44:28 -0400336 acpi_status status;
337 struct acpi_gpe_block_info *gpe_block;
Bob Moore08978312005-10-21 00:00:00 -0400338 struct acpi_gpe_register_info *gpe_register_info;
339 u32 int_status = ACPI_INTERRUPT_NOT_HANDLED;
340 u8 enabled_status_byte;
341 u32 status_reg;
342 u32 enable_reg;
Bob Mooreb8e4d892006-01-27 16:43:00 -0500343 acpi_cpu_flags flags;
Bob Moore67a119f2008-06-10 13:42:13 +0800344 u32 i;
345 u32 j;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346
Bob Mooreb229cf92006-04-21 17:15:00 -0400347 ACPI_FUNCTION_NAME(ev_gpe_detect);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348
349 /* Check for the case where there are no GPEs */
350
351 if (!gpe_xrupt_list) {
352 return (int_status);
353 }
354
Bob Moore967440e32006-06-23 17:04:00 -0400355 /*
356 * We need to obtain the GPE lock for both the data structs and registers
Bob Moore9f15fc62008-11-12 16:01:56 +0800357 * Note: Not necessary to obtain the hardware lock, since the GPE
358 * registers are owned by the gpe_lock.
Bob Moore967440e32006-06-23 17:04:00 -0400359 */
Len Brown4be44fc2005-08-05 00:44:28 -0400360 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
Bob Moore4c90ece2006-06-08 16:29:00 -0400361
362 /* Examine all GPE blocks attached to this interrupt level */
363
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364 gpe_block = gpe_xrupt_list->gpe_block_list_head;
365 while (gpe_block) {
366 /*
Bob Moore9f15fc62008-11-12 16:01:56 +0800367 * Read all of the 8-bit GPE status and enable registers in this GPE
368 * block, saving all of them. Find all currently active GP events.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369 */
370 for (i = 0; i < gpe_block->register_count; i++) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400371
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372 /* Get the next status/enable pair */
373
374 gpe_register_info = &gpe_block->register_info[i];
375
Lin Ming6dfad332011-02-14 15:29:34 +0800376 /*
377 * Optimization: If there are no GPEs enabled within this
378 * register, we can safely ignore the entire register.
379 */
380 if (!(gpe_register_info->enable_for_run |
381 gpe_register_info->enable_for_wake)) {
382 continue;
383 }
384
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385 /* Read the Status Register */
386
Len Brown4be44fc2005-08-05 00:44:28 -0400387 status =
Bob Moorec6b57742009-06-24 09:44:06 +0800388 acpi_hw_read(&status_reg,
389 &gpe_register_info->status_address);
Len Brown4be44fc2005-08-05 00:44:28 -0400390 if (ACPI_FAILURE(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391 goto unlock_and_exit;
392 }
393
394 /* Read the Enable Register */
395
Len Brown4be44fc2005-08-05 00:44:28 -0400396 status =
Bob Moorec6b57742009-06-24 09:44:06 +0800397 acpi_hw_read(&enable_reg,
398 &gpe_register_info->enable_address);
Len Brown4be44fc2005-08-05 00:44:28 -0400399 if (ACPI_FAILURE(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400 goto unlock_and_exit;
401 }
402
Len Brown4be44fc2005-08-05 00:44:28 -0400403 ACPI_DEBUG_PRINT((ACPI_DB_INTERRUPTS,
Lin Mingda503372010-12-13 13:39:37 +0800404 "Read GPE Register at GPE%02X: Status=%02X, Enable=%02X\n",
Len Brown4be44fc2005-08-05 00:44:28 -0400405 gpe_register_info->base_gpe_number,
406 status_reg, enable_reg));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407
Robert Moore44f6c012005-04-18 22:49:35 -0400408 /* Check if there is anything active at all in this register */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409
410 enabled_status_byte = (u8) (status_reg & enable_reg);
411 if (!enabled_status_byte) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400412
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413 /* No active GPEs in this register, move on */
414
415 continue;
416 }
417
418 /* Now look at the individual GPEs in this byte register */
419
420 for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400421
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422 /* Examine one GPE bit */
423
Alexey Starikovskiy69874162007-02-02 19:48:19 +0300424 if (enabled_status_byte & (1 << j)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425 /*
426 * Found an active GPE. Dispatch the event to a handler
427 * or method.
428 */
Len Brown4be44fc2005-08-05 00:44:28 -0400429 int_status |=
Lin Ming8b6cd8a2010-12-13 13:38:46 +0800430 acpi_ev_gpe_dispatch(gpe_block->
431 node,
432 &gpe_block->
Bob Moore67a119f2008-06-10 13:42:13 +0800433 event_info[((acpi_size) i * ACPI_GPE_REGISTER_WIDTH) + j], j + gpe_register_info->base_gpe_number);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434 }
435 }
436 }
437
438 gpe_block = gpe_block->next;
439 }
440
Len Brown4be44fc2005-08-05 00:44:28 -0400441 unlock_and_exit:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442
Len Brown4be44fc2005-08-05 00:44:28 -0400443 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 return (int_status);
445}
446
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447/*******************************************************************************
448 *
449 * FUNCTION: acpi_ev_asynch_execute_gpe_method
450 *
451 * PARAMETERS: Context (gpe_event_info) - Info for this GPE
452 *
453 * RETURN: None
454 *
Bob Moore41195322006-05-26 16:36:00 -0400455 * DESCRIPTION: Perform the actual execution of a GPE control method. This
456 * function is called from an invocation of acpi_os_execute and
457 * therefore does NOT execute at interrupt level - so that
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458 * the control method itself is not executed in the context of
459 * an interrupt handler.
460 *
461 ******************************************************************************/
462
Len Brown4be44fc2005-08-05 00:44:28 -0400463static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464{
Lin Ming5a284cd2010-12-13 13:39:07 +0800465 struct acpi_gpe_event_info *gpe_event_info = context;
Len Brown4be44fc2005-08-05 00:44:28 -0400466 acpi_status status;
Lin Ming5a284cd2010-12-13 13:39:07 +0800467 struct acpi_gpe_event_info *local_gpe_event_info;
Bob Moore41195322006-05-26 16:36:00 -0400468 struct acpi_evaluate_info *info;
Bob Moore5816b342012-06-29 10:04:17 +0800469 struct acpi_gpe_notify_info *notify;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470
Bob Mooreb229cf92006-04-21 17:15:00 -0400471 ACPI_FUNCTION_TRACE(ev_asynch_execute_gpe_method);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472
Lin Ming5a284cd2010-12-13 13:39:07 +0800473 /* Allocate a local GPE block */
474
475 local_gpe_event_info =
476 ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_event_info));
477 if (!local_gpe_event_info) {
478 ACPI_EXCEPTION((AE_INFO, AE_NO_MEMORY, "while handling a GPE"));
479 return_VOID;
480 }
481
Len Brown4be44fc2005-08-05 00:44:28 -0400482 status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
483 if (ACPI_FAILURE(status)) {
Jesper Juhlbe33b762011-01-16 20:37:52 +0100484 ACPI_FREE(local_gpe_event_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485 return_VOID;
486 }
487
488 /* Must revalidate the gpe_number/gpe_block */
489
Len Brown4be44fc2005-08-05 00:44:28 -0400490 if (!acpi_ev_valid_gpe_event(gpe_event_info)) {
491 status = acpi_ut_release_mutex(ACPI_MTX_EVENTS);
Jesper Juhlbe33b762011-01-16 20:37:52 +0100492 ACPI_FREE(local_gpe_event_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 return_VOID;
494 }
495
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496 /*
Bob Moore9f15fc62008-11-12 16:01:56 +0800497 * Take a snapshot of the GPE info for this level - we copy the info to
498 * prevent a race condition with remove_handler/remove_block.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499 */
Lin Ming5a284cd2010-12-13 13:39:07 +0800500 ACPI_MEMCPY(local_gpe_event_info, gpe_event_info,
Len Brown4be44fc2005-08-05 00:44:28 -0400501 sizeof(struct acpi_gpe_event_info));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502
Len Brown4be44fc2005-08-05 00:44:28 -0400503 status = acpi_ut_release_mutex(ACPI_MTX_EVENTS);
504 if (ACPI_FAILURE(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505 return_VOID;
506 }
507
Lin Mingbba63a22010-12-13 13:39:17 +0800508 /* Do the correct dispatch - normal method or implicit notify */
509
510 switch (local_gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) {
511 case ACPI_GPE_DISPATCH_NOTIFY:
512
513 /*
514 * Implicit notify.
515 * Dispatch a DEVICE_WAKE notify to the appropriate handler.
516 * NOTE: the request is queued for execution after this method
517 * completes. The notify handlers are NOT invoked synchronously
518 * from this thread -- because handlers may in turn run other
519 * control methods.
Bob Moore5816b342012-06-29 10:04:17 +0800520 *
521 * June 2012: Expand implicit notify mechanism to support
522 * notifies on multiple device objects.
Lin Mingbba63a22010-12-13 13:39:17 +0800523 */
Bob Moore5816b342012-06-29 10:04:17 +0800524 notify = local_gpe_event_info->dispatch.notify_list;
525 while (ACPI_SUCCESS(status) && notify) {
526 status =
527 acpi_ev_queue_notify_request(notify->device_node,
528 ACPI_NOTIFY_DEVICE_WAKE);
Rafael J. Wysocki981858b2011-02-24 19:59:21 +0100529
Bob Moore5816b342012-06-29 10:04:17 +0800530 notify = notify->next;
Rafael J. Wysocki981858b2011-02-24 19:59:21 +0100531 }
532
Lin Mingbba63a22010-12-13 13:39:17 +0800533 break;
534
535 case ACPI_GPE_DISPATCH_METHOD:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536
Bob Moore41195322006-05-26 16:36:00 -0400537 /* Allocate the evaluation information block */
538
539 info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info));
540 if (!info) {
541 status = AE_NO_MEMORY;
542 } else {
543 /*
544 * Invoke the GPE Method (_Lxx, _Exx) i.e., evaluate the _Lxx/_Exx
545 * control method that corresponds to this GPE
546 */
547 info->prefix_node =
Lin Ming5a284cd2010-12-13 13:39:07 +0800548 local_gpe_event_info->dispatch.method_node;
Bob Moore41195322006-05-26 16:36:00 -0400549 info->flags = ACPI_IGNORE_RETURN_VALUE;
550
551 status = acpi_ns_evaluate(info);
552 ACPI_FREE(info);
553 }
554
Len Brown4be44fc2005-08-05 00:44:28 -0400555 if (ACPI_FAILURE(status)) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500556 ACPI_EXCEPTION((AE_INFO, status,
Bob Moore2e420052007-02-02 19:48:18 +0300557 "while evaluating GPE method [%4.4s]",
Bob Mooreb8e4d892006-01-27 16:43:00 -0500558 acpi_ut_get_node_name
Lin Ming5a284cd2010-12-13 13:39:07 +0800559 (local_gpe_event_info->dispatch.
Bob Moore4c90ece2006-06-08 16:29:00 -0400560 method_node)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561 }
Lin Mingbba63a22010-12-13 13:39:17 +0800562
563 break;
564
565 default:
566 return_VOID; /* Should never happen */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567 }
Lin Ming5a284cd2010-12-13 13:39:07 +0800568
Alexey Starikovskiy17bc54e2007-11-13 13:05:45 +0300569 /* Defer enabling of GPE until all notify handlers are done */
Lin Ming5a284cd2010-12-13 13:39:07 +0800570
571 status = acpi_os_execute(OSL_NOTIFY_HANDLER,
572 acpi_ev_asynch_enable_gpe,
573 local_gpe_event_info);
574 if (ACPI_FAILURE(status)) {
575 ACPI_FREE(local_gpe_event_info);
576 }
Alexey Starikovskiy17bc54e2007-11-13 13:05:45 +0300577 return_VOID;
578}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579
Lin Mingbba63a22010-12-13 13:39:17 +0800580
Lin Ming5a284cd2010-12-13 13:39:07 +0800581/*******************************************************************************
582 *
583 * FUNCTION: acpi_ev_asynch_enable_gpe
584 *
585 * PARAMETERS: Context (gpe_event_info) - Info for this GPE
586 * Callback from acpi_os_execute
587 *
588 * RETURN: None
589 *
590 * DESCRIPTION: Asynchronous clear/enable for GPE. This allows the GPE to
Lin Mingbba63a22010-12-13 13:39:17 +0800591 * complete (i.e., finish execution of Notify)
Lin Ming5a284cd2010-12-13 13:39:07 +0800592 *
593 ******************************************************************************/
594
595static void ACPI_SYSTEM_XFACE acpi_ev_asynch_enable_gpe(void *context)
Alexey Starikovskiy17bc54e2007-11-13 13:05:45 +0300596{
597 struct acpi_gpe_event_info *gpe_event_info = context;
Lin Mingbba63a22010-12-13 13:39:17 +0800598
599 (void)acpi_ev_finish_gpe(gpe_event_info);
600
601 ACPI_FREE(gpe_event_info);
602 return;
603}
604
605
606/*******************************************************************************
607 *
608 * FUNCTION: acpi_ev_finish_gpe
609 *
610 * PARAMETERS: gpe_event_info - Info for this GPE
611 *
612 * RETURN: Status
613 *
614 * DESCRIPTION: Clear/Enable a GPE. Common code that is used after execution
615 * of a GPE method or a synchronous or asynchronous GPE handler.
616 *
617 ******************************************************************************/
618
619acpi_status acpi_ev_finish_gpe(struct acpi_gpe_event_info *gpe_event_info)
620{
Alexey Starikovskiy17bc54e2007-11-13 13:05:45 +0300621 acpi_status status;
Lin Ming5a284cd2010-12-13 13:39:07 +0800622
Alexey Starikovskiy17bc54e2007-11-13 13:05:45 +0300623 if ((gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK) ==
Len Brown4be44fc2005-08-05 00:44:28 -0400624 ACPI_GPE_LEVEL_TRIGGERED) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625 /*
Lin Mingbba63a22010-12-13 13:39:17 +0800626 * GPE is level-triggered, we clear the GPE status bit after
627 * handling the event.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628 */
Alexey Starikovskiy17bc54e2007-11-13 13:05:45 +0300629 status = acpi_hw_clear_gpe(gpe_event_info);
Len Brown4be44fc2005-08-05 00:44:28 -0400630 if (ACPI_FAILURE(status)) {
Lin Mingbba63a22010-12-13 13:39:17 +0800631 return (status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632 }
633 }
634
Bob Moorede5668f2010-07-06 10:30:37 +0800635 /*
Lin Mingbba63a22010-12-13 13:39:17 +0800636 * Enable this GPE, conditionally. This means that the GPE will
637 * only be physically enabled if the enable_for_run bit is set
638 * in the event_info.
Bob Moorede5668f2010-07-06 10:30:37 +0800639 */
Lin Ming3a378982010-12-13 13:36:15 +0800640 (void)acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_CONDITIONAL_ENABLE);
Lin Mingbba63a22010-12-13 13:39:17 +0800641 return (AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642}
643
Lin Mingbba63a22010-12-13 13:39:17 +0800644
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645/*******************************************************************************
646 *
647 * FUNCTION: acpi_ev_gpe_dispatch
648 *
Lin Ming8b6cd8a2010-12-13 13:38:46 +0800649 * PARAMETERS: gpe_device - Device node. NULL for GPE0/GPE1
650 * gpe_event_info - Info for this GPE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651 * gpe_number - Number relative to the parent GPE block
652 *
653 * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
654 *
655 * DESCRIPTION: Dispatch a General Purpose Event to either a function (e.g. EC)
656 * or method (e.g. _Lxx/_Exx) handler.
657 *
658 * This function executes at interrupt level.
659 *
660 ******************************************************************************/
661
662u32
Lin Ming8b6cd8a2010-12-13 13:38:46 +0800663acpi_ev_gpe_dispatch(struct acpi_namespace_node *gpe_device,
664 struct acpi_gpe_event_info *gpe_event_info, u32 gpe_number)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665{
Len Brown4be44fc2005-08-05 00:44:28 -0400666 acpi_status status;
Lin Mingbba63a22010-12-13 13:39:17 +0800667 u32 return_value;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668
Bob Mooreb229cf92006-04-21 17:15:00 -0400669 ACPI_FUNCTION_TRACE(ev_gpe_dispatch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670
Lin Minga0fcdb22010-12-13 13:39:26 +0800671 /* Invoke global event handler if present */
672
673 acpi_gpe_count++;
674 if (acpi_gbl_global_event_handler) {
675 acpi_gbl_global_event_handler(ACPI_EVENT_TYPE_GPE, gpe_device,
676 gpe_number,
677 acpi_gbl_global_event_handler_context);
678 }
Bob Moorefdffb722007-02-02 19:48:19 +0300679
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680 /*
Bob Moore9f15fc62008-11-12 16:01:56 +0800681 * If edge-triggered, clear the GPE status bit now. Note that
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682 * level-triggered events are cleared after the GPE is serviced.
683 */
Robert Moore44f6c012005-04-18 22:49:35 -0400684 if ((gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK) ==
Len Brown4be44fc2005-08-05 00:44:28 -0400685 ACPI_GPE_EDGE_TRIGGERED) {
686 status = acpi_hw_clear_gpe(gpe_event_info);
687 if (ACPI_FAILURE(status)) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500688 ACPI_EXCEPTION((AE_INFO, status,
Lin Mingda503372010-12-13 13:39:37 +0800689 "Unable to clear GPE%02X", gpe_number));
Bob Moore50eca3e2005-09-30 19:03:00 -0400690 return_UINT32(ACPI_INTERRUPT_NOT_HANDLED);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691 }
692 }
693
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694 /*
Lin Mingbba63a22010-12-13 13:39:17 +0800695 * Always disable the GPE so that it does not keep firing before
696 * any asynchronous activity completes (either from the execution
697 * of a GPE method or an asynchronous GPE handler.)
698 *
699 * If there is no handler or method to run, just disable the
700 * GPE and leave it disabled permanently to prevent further such
701 * pointless events from firing.
702 */
703 status = acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_DISABLE);
704 if (ACPI_FAILURE(status)) {
705 ACPI_EXCEPTION((AE_INFO, status,
706 "Unable to disable GPE%02X", gpe_number));
707 return_UINT32(ACPI_INTERRUPT_NOT_HANDLED);
708 }
709
710 /*
711 * Dispatch the GPE to either an installed handler or the control
712 * method associated with this GPE (_Lxx or _Exx). If a handler
713 * exists, we invoke it and do not attempt to run the method.
714 * If there is neither a handler nor a method, leave the GPE
715 * disabled.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716 */
717 switch (gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) {
718 case ACPI_GPE_DISPATCH_HANDLER:
719
Lin Mingbba63a22010-12-13 13:39:17 +0800720 /* Invoke the installed handler (at interrupt level) */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721
Lin Mingbba63a22010-12-13 13:39:17 +0800722 return_value =
723 gpe_event_info->dispatch.handler->address(gpe_device,
724 gpe_number,
725 gpe_event_info->
726 dispatch.handler->
727 context);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728
Lin Mingbba63a22010-12-13 13:39:17 +0800729 /* If requested, clear (if level-triggered) and reenable the GPE */
730
731 if (return_value & ACPI_REENABLE_GPE) {
732 (void)acpi_ev_finish_gpe(gpe_event_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733 }
734 break;
735
736 case ACPI_GPE_DISPATCH_METHOD:
Lin Mingbba63a22010-12-13 13:39:17 +0800737 case ACPI_GPE_DISPATCH_NOTIFY:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700738
739 /*
740 * Execute the method associated with the GPE
741 * NOTE: Level-triggered GPEs are cleared after the method completes.
742 */
Bob Moore958dd242006-05-12 17:12:00 -0400743 status = acpi_os_execute(OSL_GPE_HANDLER,
744 acpi_ev_asynch_execute_gpe_method,
745 gpe_event_info);
Len Brown4be44fc2005-08-05 00:44:28 -0400746 if (ACPI_FAILURE(status)) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500747 ACPI_EXCEPTION((AE_INFO, status,
Lin Mingda503372010-12-13 13:39:37 +0800748 "Unable to queue handler for GPE%2X - event disabled",
Bob Mooreb8e4d892006-01-27 16:43:00 -0500749 gpe_number));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750 }
751 break;
752
753 default:
754
Lin Ming0f849d22010-04-06 14:52:37 +0800755 /*
756 * No handler or method to run!
757 * 03/2010: This case should no longer be possible. We will not allow
758 * a GPE to be enabled if it has no handler or method.
759 */
Bob Mooreb8e4d892006-01-27 16:43:00 -0500760 ACPI_ERROR((AE_INFO,
Lin Mingda503372010-12-13 13:39:37 +0800761 "No handler or method for GPE%02X, disabling event",
Bob Mooreb8e4d892006-01-27 16:43:00 -0500762 gpe_number));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764 break;
765 }
766
Bob Moore50eca3e2005-09-30 19:03:00 -0400767 return_UINT32(ACPI_INTERRUPT_HANDLED);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768}
Bob Moore33620c52012-02-14 18:14:27 +0800769
770#endif /* !ACPI_REDUCED_HARDWARE */