blob: ccf7932474475874678a122afcfdad9b02e7d695 [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/*
David E. Box82a80942015-02-05 15:20:45 +08008 * Copyright (C) 2000 - 2015, 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
Feng Tang1d94e1e2012-08-17 11:10:02 +080083 register_bit = acpi_hw_get_gpe_register_bit(gpe_event_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -070084
Rafael J. Wysockia44061a2010-07-01 10:11:45 +080085 /* Clear the run bit up front */
Lin Ming0f849d22010-04-06 14:52:37 +080086
Rafael J. Wysocki9630bdd2010-02-17 23:41:07 +010087 ACPI_CLEAR_BIT(gpe_register_info->enable_for_run, register_bit);
Linus Torvalds1da177e2005-04-16 15:20:36 -070088
Rafael J. Wysockia44061a2010-07-01 10:11:45 +080089 /* Set the mask bit only if there are references to this GPE */
Linus Torvalds1da177e2005-04-16 15:20:36 -070090
Lin Ming0f849d22010-04-06 14:52:37 +080091 if (gpe_event_info->runtime_count) {
Lv Zheng1f86e8c2012-10-31 02:25:45 +000092 ACPI_SET_BIT(gpe_register_info->enable_for_run,
93 (u8)register_bit);
Lin Ming0f849d22010-04-06 14:52:37 +080094 }
Rafael J. Wysocki0ee0d342015-04-15 04:00:27 +020095 gpe_register_info->enable_mask = gpe_register_info->enable_for_run;
Linus Torvalds1da177e2005-04-16 15:20:36 -070096
Len Brown4be44fc2005-08-05 00:44:28 -040097 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -070098}
99
Rafael J. Wysocki3bd741b2010-07-01 11:01:12 +0800100/*******************************************************************************
101 *
102 * FUNCTION: acpi_ev_enable_gpe
103 *
Lv Zhengf19f1a72014-10-10 10:39:39 +0800104 * PARAMETERS: gpe_event_info - GPE to enable
Rafael J. Wysocki3bd741b2010-07-01 11:01:12 +0800105 *
106 * RETURN: Status
107 *
Lin Mingda503372010-12-13 13:39:37 +0800108 * DESCRIPTION: Clear a GPE of stale events and enable it.
Rafael J. Wysocki3bd741b2010-07-01 11:01:12 +0800109 *
110 ******************************************************************************/
Lv Zhengf19f1a72014-10-10 10:39:39 +0800111
Lv Zheng1f86e8c2012-10-31 02:25:45 +0000112acpi_status acpi_ev_enable_gpe(struct acpi_gpe_event_info *gpe_event_info)
Rafael J. Wysocki3bd741b2010-07-01 11:01:12 +0800113{
114 acpi_status status;
115
116 ACPI_FUNCTION_TRACE(ev_enable_gpe);
117
Rafael J. Wysocki3bd741b2010-07-01 11:01:12 +0800118 /* Clear the GPE (of stale events) */
Lv Zhengf19f1a72014-10-10 10:39:39 +0800119
Rafael J. Wysocki3bd741b2010-07-01 11:01:12 +0800120 status = acpi_hw_clear_gpe(gpe_event_info);
121 if (ACPI_FAILURE(status)) {
122 return_ACPI_STATUS(status);
123 }
124
125 /* Enable the requested GPE */
Rafael J. Wysocki3bd741b2010-07-01 11:01:12 +0800126
Rafael J. Wysocki0ee0d342015-04-15 04:00:27 +0200127 status = acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_ENABLE);
Rafael J. Wysocki3bd741b2010-07-01 11:01:12 +0800128 return_ACPI_STATUS(status);
129}
130
Lin Ming0f849d22010-04-06 14:52:37 +0800131/*******************************************************************************
132 *
Lin Ming3a378982010-12-13 13:36:15 +0800133 * FUNCTION: acpi_ev_add_gpe_reference
Rafael J. Wysocki28f4f8a2010-08-03 23:55:14 +0200134 *
Lin Mingda503372010-12-13 13:39:37 +0800135 * PARAMETERS: gpe_event_info - Add a reference to this GPE
Rafael J. Wysocki28f4f8a2010-08-03 23:55:14 +0200136 *
137 * RETURN: Status
138 *
139 * DESCRIPTION: Add a reference to a GPE. On the first reference, the GPE is
140 * hardware-enabled.
141 *
142 ******************************************************************************/
143
Lv Zheng1f86e8c2012-10-31 02:25:45 +0000144acpi_status
145acpi_ev_add_gpe_reference(struct acpi_gpe_event_info *gpe_event_info)
Rafael J. Wysocki28f4f8a2010-08-03 23:55:14 +0200146{
147 acpi_status status = AE_OK;
148
Lin Ming3a378982010-12-13 13:36:15 +0800149 ACPI_FUNCTION_TRACE(ev_add_gpe_reference);
150
Rafael J. Wysocki28f4f8a2010-08-03 23:55:14 +0200151 if (gpe_event_info->runtime_count == ACPI_UINT8_MAX) {
152 return_ACPI_STATUS(AE_LIMIT);
153 }
154
155 gpe_event_info->runtime_count++;
156 if (gpe_event_info->runtime_count == 1) {
Lin Mingda503372010-12-13 13:39:37 +0800157
158 /* Enable on first reference */
159
Rafael J. Wysocki28f4f8a2010-08-03 23:55:14 +0200160 status = acpi_ev_update_gpe_enable_mask(gpe_event_info);
161 if (ACPI_SUCCESS(status)) {
162 status = acpi_ev_enable_gpe(gpe_event_info);
163 }
164
165 if (ACPI_FAILURE(status)) {
166 gpe_event_info->runtime_count--;
167 }
168 }
169
170 return_ACPI_STATUS(status);
171}
172
173/*******************************************************************************
174 *
Lin Ming3a378982010-12-13 13:36:15 +0800175 * FUNCTION: acpi_ev_remove_gpe_reference
Rafael J. Wysocki28f4f8a2010-08-03 23:55:14 +0200176 *
Lin Mingda503372010-12-13 13:39:37 +0800177 * PARAMETERS: gpe_event_info - Remove a reference to this GPE
Rafael J. Wysocki28f4f8a2010-08-03 23:55:14 +0200178 *
179 * RETURN: Status
180 *
181 * DESCRIPTION: Remove a reference to a GPE. When the last reference is
182 * removed, the GPE is hardware-disabled.
183 *
184 ******************************************************************************/
185
Lv Zheng1f86e8c2012-10-31 02:25:45 +0000186acpi_status
187acpi_ev_remove_gpe_reference(struct acpi_gpe_event_info *gpe_event_info)
Rafael J. Wysocki28f4f8a2010-08-03 23:55:14 +0200188{
189 acpi_status status = AE_OK;
190
Lin Ming3a378982010-12-13 13:36:15 +0800191 ACPI_FUNCTION_TRACE(ev_remove_gpe_reference);
192
Rafael J. Wysocki28f4f8a2010-08-03 23:55:14 +0200193 if (!gpe_event_info->runtime_count) {
194 return_ACPI_STATUS(AE_LIMIT);
195 }
196
197 gpe_event_info->runtime_count--;
198 if (!gpe_event_info->runtime_count) {
Lin Mingda503372010-12-13 13:39:37 +0800199
200 /* Disable on last reference */
201
Rafael J. Wysocki28f4f8a2010-08-03 23:55:14 +0200202 status = acpi_ev_update_gpe_enable_mask(gpe_event_info);
203 if (ACPI_SUCCESS(status)) {
Lv Zheng1f86e8c2012-10-31 02:25:45 +0000204 status =
205 acpi_hw_low_set_gpe(gpe_event_info,
Rafael J. Wysocki0ee0d342015-04-15 04:00:27 +0200206 ACPI_GPE_DISABLE);
Rafael J. Wysocki28f4f8a2010-08-03 23:55:14 +0200207 }
208
209 if (ACPI_FAILURE(status)) {
210 gpe_event_info->runtime_count++;
211 }
212 }
213
214 return_ACPI_STATUS(status);
215}
216
217/*******************************************************************************
218 *
Lin Ming0f849d22010-04-06 14:52:37 +0800219 * FUNCTION: acpi_ev_low_get_gpe_info
220 *
221 * PARAMETERS: gpe_number - Raw GPE number
222 * gpe_block - A GPE info block
223 *
224 * RETURN: A GPE event_info struct. NULL if not a valid GPE (The gpe_number
225 * is not within the specified GPE block)
226 *
227 * DESCRIPTION: Returns the event_info struct associated with this GPE. This is
228 * the low-level implementation of ev_get_gpe_event_info.
229 *
230 ******************************************************************************/
231
232struct acpi_gpe_event_info *acpi_ev_low_get_gpe_info(u32 gpe_number,
233 struct acpi_gpe_block_info
234 *gpe_block)
235{
236 u32 gpe_index;
237
238 /*
239 * Validate that the gpe_number is within the specified gpe_block.
240 * (Two steps)
241 */
242 if (!gpe_block || (gpe_number < gpe_block->block_base_number)) {
243 return (NULL);
244 }
245
246 gpe_index = gpe_number - gpe_block->block_base_number;
247 if (gpe_index >= gpe_block->gpe_count) {
248 return (NULL);
249 }
250
251 return (&gpe_block->event_info[gpe_index]);
252}
253
254
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255/*******************************************************************************
256 *
257 * FUNCTION: acpi_ev_get_gpe_event_info
258 *
Bob Moore9f15fc62008-11-12 16:01:56 +0800259 * PARAMETERS: gpe_device - Device node. NULL for GPE0/GPE1
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260 * gpe_number - Raw GPE number
261 *
262 * RETURN: A GPE event_info struct. NULL if not a valid GPE
263 *
264 * DESCRIPTION: Returns the event_info struct associated with this GPE.
265 * Validates the gpe_block and the gpe_number
266 *
267 * Should be called only when the GPE lists are semaphore locked
268 * and not subject to change.
269 *
270 ******************************************************************************/
271
Len Brown4be44fc2005-08-05 00:44:28 -0400272struct acpi_gpe_event_info *acpi_ev_get_gpe_event_info(acpi_handle gpe_device,
273 u32 gpe_number)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274{
Len Brown4be44fc2005-08-05 00:44:28 -0400275 union acpi_operand_object *obj_desc;
Lin Ming0f849d22010-04-06 14:52:37 +0800276 struct acpi_gpe_event_info *gpe_info;
Bob Moore67a119f2008-06-10 13:42:13 +0800277 u32 i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278
Len Brown4be44fc2005-08-05 00:44:28 -0400279 ACPI_FUNCTION_ENTRY();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280
Bob Moore186c3072010-04-27 11:32:28 +0800281 /* A NULL gpe_device means use the FADT-defined GPE block(s) */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282
283 if (!gpe_device) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400284
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285 /* Examine GPE Block 0 and 1 (These blocks are permanent) */
286
287 for (i = 0; i < ACPI_MAX_GPE_BLOCKS; i++) {
Lin Ming0f849d22010-04-06 14:52:37 +0800288 gpe_info = acpi_ev_low_get_gpe_info(gpe_number,
289 acpi_gbl_gpe_fadt_blocks
290 [i]);
291 if (gpe_info) {
292 return (gpe_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 }
294 }
295
296 /* The gpe_number was not in the range of either FADT GPE block */
297
298 return (NULL);
299 }
300
301 /* A Non-NULL gpe_device means this is a GPE Block Device */
302
Lv Zheng1f86e8c2012-10-31 02:25:45 +0000303 obj_desc =
304 acpi_ns_get_attached_object((struct acpi_namespace_node *)
Len Brownfd350942007-05-09 23:34:35 -0400305 gpe_device);
Len Brown4be44fc2005-08-05 00:44:28 -0400306 if (!obj_desc || !obj_desc->device.gpe_block) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307 return (NULL);
308 }
309
Lin Ming0f849d22010-04-06 14:52:37 +0800310 return (acpi_ev_low_get_gpe_info
311 (gpe_number, obj_desc->device.gpe_block));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312}
313
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314/*******************************************************************************
315 *
316 * FUNCTION: acpi_ev_gpe_detect
317 *
318 * PARAMETERS: gpe_xrupt_list - Interrupt block for this interrupt.
319 * Can have multiple GPE blocks attached.
320 *
321 * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
322 *
Bob Moore9f15fc62008-11-12 16:01:56 +0800323 * DESCRIPTION: Detect if any GP events have occurred. This function is
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324 * executed at interrupt level.
325 *
326 ******************************************************************************/
327
Lv Zhengf19f1a72014-10-10 10:39:39 +0800328u32 acpi_ev_gpe_detect(struct acpi_gpe_xrupt_info *gpe_xrupt_list)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329{
Len Brown4be44fc2005-08-05 00:44:28 -0400330 acpi_status status;
331 struct acpi_gpe_block_info *gpe_block;
Lv Zheng779ba5a2015-02-05 15:20:22 +0800332 struct acpi_namespace_node *gpe_device;
Bob Moore08978312005-10-21 00:00:00 -0400333 struct acpi_gpe_register_info *gpe_register_info;
Lv Zheng779ba5a2015-02-05 15:20:22 +0800334 struct acpi_gpe_event_info *gpe_event_info;
335 u32 gpe_number;
Lv Zheng0d0988a2015-02-05 16:27:03 +0800336 struct acpi_gpe_handler_info *gpe_handler_info;
Bob Moore08978312005-10-21 00:00:00 -0400337 u32 int_status = ACPI_INTERRUPT_NOT_HANDLED;
338 u8 enabled_status_byte;
339 u32 status_reg;
340 u32 enable_reg;
Bob Mooreb8e4d892006-01-27 16:43:00 -0500341 acpi_cpu_flags flags;
Bob Moore67a119f2008-06-10 13:42:13 +0800342 u32 i;
343 u32 j;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344
Bob Mooreb229cf92006-04-21 17:15:00 -0400345 ACPI_FUNCTION_NAME(ev_gpe_detect);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346
347 /* Check for the case where there are no GPEs */
348
349 if (!gpe_xrupt_list) {
350 return (int_status);
351 }
352
Bob Moore967440e32006-06-23 17:04:00 -0400353 /*
354 * We need to obtain the GPE lock for both the data structs and registers
Bob Moore9f15fc62008-11-12 16:01:56 +0800355 * Note: Not necessary to obtain the hardware lock, since the GPE
356 * registers are owned by the gpe_lock.
Bob Moore967440e32006-06-23 17:04:00 -0400357 */
Len Brown4be44fc2005-08-05 00:44:28 -0400358 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
Bob Moore4c90ece2006-06-08 16:29:00 -0400359
360 /* Examine all GPE blocks attached to this interrupt level */
361
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362 gpe_block = gpe_xrupt_list->gpe_block_list_head;
363 while (gpe_block) {
Lv Zheng779ba5a2015-02-05 15:20:22 +0800364 gpe_device = gpe_block->node;
365
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 /*
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)) {
Bob Mooree1154eb2012-08-17 10:55:14 +0800382 ACPI_DEBUG_PRINT((ACPI_DB_INTERRUPTS,
Bob Moore7505da42014-04-30 10:06:15 +0800383 "Ignore disabled registers for GPE %02X-%02X: "
Bob Mooree1154eb2012-08-17 10:55:14 +0800384 "RunEnable=%02X, WakeEnable=%02X\n",
385 gpe_register_info->
386 base_gpe_number,
387 gpe_register_info->
388 base_gpe_number +
389 (ACPI_GPE_REGISTER_WIDTH - 1),
390 gpe_register_info->
391 enable_for_run,
392 gpe_register_info->
393 enable_for_wake));
Lin Ming6dfad332011-02-14 15:29:34 +0800394 continue;
395 }
396
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397 /* Read the Status Register */
398
Len Brown4be44fc2005-08-05 00:44:28 -0400399 status =
Bob Moorec6b57742009-06-24 09:44:06 +0800400 acpi_hw_read(&status_reg,
401 &gpe_register_info->status_address);
Len Brown4be44fc2005-08-05 00:44:28 -0400402 if (ACPI_FAILURE(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 goto unlock_and_exit;
404 }
405
406 /* Read the Enable Register */
407
Len Brown4be44fc2005-08-05 00:44:28 -0400408 status =
Bob Moorec6b57742009-06-24 09:44:06 +0800409 acpi_hw_read(&enable_reg,
410 &gpe_register_info->enable_address);
Len Brown4be44fc2005-08-05 00:44:28 -0400411 if (ACPI_FAILURE(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412 goto unlock_and_exit;
413 }
414
Len Brown4be44fc2005-08-05 00:44:28 -0400415 ACPI_DEBUG_PRINT((ACPI_DB_INTERRUPTS,
Bob Moore7505da42014-04-30 10:06:15 +0800416 "Read registers for GPE %02X-%02X: Status=%02X, Enable=%02X, "
Bob Mooree1154eb2012-08-17 10:55:14 +0800417 "RunEnable=%02X, WakeEnable=%02X\n",
Len Brown4be44fc2005-08-05 00:44:28 -0400418 gpe_register_info->base_gpe_number,
Bob Mooree1154eb2012-08-17 10:55:14 +0800419 gpe_register_info->base_gpe_number +
420 (ACPI_GPE_REGISTER_WIDTH - 1),
421 status_reg, enable_reg,
422 gpe_register_info->enable_for_run,
423 gpe_register_info->enable_for_wake));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424
Robert Moore44f6c012005-04-18 22:49:35 -0400425 /* Check if there is anything active at all in this register */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426
Lv Zhengf19f1a72014-10-10 10:39:39 +0800427 enabled_status_byte = (u8)(status_reg & enable_reg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428 if (!enabled_status_byte) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400429
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430 /* No active GPEs in this register, move on */
431
432 continue;
433 }
434
435 /* Now look at the individual GPEs in this byte register */
436
437 for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400438
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439 /* Examine one GPE bit */
440
Lv Zheng779ba5a2015-02-05 15:20:22 +0800441 gpe_event_info =
442 &gpe_block->
443 event_info[((acpi_size) i *
444 ACPI_GPE_REGISTER_WIDTH) + j];
445 gpe_number =
446 j + gpe_register_info->base_gpe_number;
447
Alexey Starikovskiy69874162007-02-02 19:48:19 +0300448 if (enabled_status_byte & (1 << j)) {
Lv Zheng779ba5a2015-02-05 15:20:22 +0800449
450 /* Invoke global event handler if present */
451
452 acpi_gpe_count++;
453 if (acpi_gbl_global_event_handler) {
454 acpi_gbl_global_event_handler
455 (ACPI_EVENT_TYPE_GPE,
456 gpe_device, gpe_number,
457 acpi_gbl_global_event_handler_context);
458 }
459
Lv Zheng0d0988a2015-02-05 16:27:03 +0800460 /* Found an active GPE */
461
462 if (ACPI_GPE_DISPATCH_TYPE
463 (gpe_event_info->flags) ==
464 ACPI_GPE_DISPATCH_RAW_HANDLER) {
465
466 /* Dispatch the event to a raw handler */
467
468 gpe_handler_info =
469 gpe_event_info->dispatch.
470 handler;
471
472 /*
473 * There is no protection around the namespace node
474 * and the GPE handler to ensure a safe destruction
475 * because:
476 * 1. The namespace node is expected to always
477 * exist after loading a table.
478 * 2. The GPE handler is expected to be flushed by
479 * acpi_os_wait_events_complete() before the
480 * destruction.
481 */
482 acpi_os_release_lock
483 (acpi_gbl_gpe_lock, flags);
484 int_status |=
485 gpe_handler_info->
486 address(gpe_device,
487 gpe_number,
488 gpe_handler_info->
489 context);
490 flags =
491 acpi_os_acquire_lock
492 (acpi_gbl_gpe_lock);
493 } else {
494 /*
495 * Dispatch the event to a standard handler or
496 * method.
497 */
498 int_status |=
499 acpi_ev_gpe_dispatch
500 (gpe_device, gpe_event_info,
501 gpe_number);
502 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503 }
504 }
505 }
506
507 gpe_block = gpe_block->next;
508 }
509
Lv Zheng10622bf2013-10-29 09:30:02 +0800510unlock_and_exit:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511
Len Brown4be44fc2005-08-05 00:44:28 -0400512 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513 return (int_status);
514}
515
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516/*******************************************************************************
517 *
518 * FUNCTION: acpi_ev_asynch_execute_gpe_method
519 *
520 * PARAMETERS: Context (gpe_event_info) - Info for this GPE
521 *
522 * RETURN: None
523 *
Bob Moore41195322006-05-26 16:36:00 -0400524 * DESCRIPTION: Perform the actual execution of a GPE control method. This
525 * function is called from an invocation of acpi_os_execute and
526 * therefore does NOT execute at interrupt level - so that
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527 * the control method itself is not executed in the context of
528 * an interrupt handler.
529 *
530 ******************************************************************************/
531
Len Brown4be44fc2005-08-05 00:44:28 -0400532static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533{
Lin Ming5a284cd2010-12-13 13:39:07 +0800534 struct acpi_gpe_event_info *gpe_event_info = context;
David E. Boxb7be6882015-02-05 15:20:07 +0800535 acpi_status status = AE_OK;
Bob Moore41195322006-05-26 16:36:00 -0400536 struct acpi_evaluate_info *info;
Bob Moore5816b342012-06-29 10:04:17 +0800537 struct acpi_gpe_notify_info *notify;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538
Bob Mooreb229cf92006-04-21 17:15:00 -0400539 ACPI_FUNCTION_TRACE(ev_asynch_execute_gpe_method);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540
Lin Mingbba63a22010-12-13 13:39:17 +0800541 /* Do the correct dispatch - normal method or implicit notify */
542
Lv Zheng7c433122015-02-05 15:20:29 +0800543 switch (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags)) {
Lin Mingbba63a22010-12-13 13:39:17 +0800544 case ACPI_GPE_DISPATCH_NOTIFY:
Lin Mingbba63a22010-12-13 13:39:17 +0800545 /*
546 * Implicit notify.
547 * Dispatch a DEVICE_WAKE notify to the appropriate handler.
548 * NOTE: the request is queued for execution after this method
549 * completes. The notify handlers are NOT invoked synchronously
550 * from this thread -- because handlers may in turn run other
551 * control methods.
Bob Moore5816b342012-06-29 10:04:17 +0800552 *
553 * June 2012: Expand implicit notify mechanism to support
554 * notifies on multiple device objects.
Lin Mingbba63a22010-12-13 13:39:17 +0800555 */
Lv Zhengb18da582015-02-05 15:20:01 +0800556 notify = gpe_event_info->dispatch.notify_list;
Bob Moore5816b342012-06-29 10:04:17 +0800557 while (ACPI_SUCCESS(status) && notify) {
558 status =
559 acpi_ev_queue_notify_request(notify->device_node,
560 ACPI_NOTIFY_DEVICE_WAKE);
Rafael J. Wysocki981858b2011-02-24 19:59:21 +0100561
Bob Moore5816b342012-06-29 10:04:17 +0800562 notify = notify->next;
Rafael J. Wysocki981858b2011-02-24 19:59:21 +0100563 }
564
Lin Mingbba63a22010-12-13 13:39:17 +0800565 break;
566
567 case ACPI_GPE_DISPATCH_METHOD:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568
Bob Moore41195322006-05-26 16:36:00 -0400569 /* Allocate the evaluation information block */
570
571 info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info));
572 if (!info) {
573 status = AE_NO_MEMORY;
574 } else {
575 /*
Lv Zheng75c80442012-12-19 05:36:49 +0000576 * Invoke the GPE Method (_Lxx, _Exx) i.e., evaluate the
577 * _Lxx/_Exx control method that corresponds to this GPE
Bob Moore41195322006-05-26 16:36:00 -0400578 */
579 info->prefix_node =
Lv Zhengb18da582015-02-05 15:20:01 +0800580 gpe_event_info->dispatch.method_node;
Bob Moore41195322006-05-26 16:36:00 -0400581 info->flags = ACPI_IGNORE_RETURN_VALUE;
582
583 status = acpi_ns_evaluate(info);
584 ACPI_FREE(info);
585 }
586
Len Brown4be44fc2005-08-05 00:44:28 -0400587 if (ACPI_FAILURE(status)) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500588 ACPI_EXCEPTION((AE_INFO, status,
Bob Moore2e420052007-02-02 19:48:18 +0300589 "while evaluating GPE method [%4.4s]",
Lv Zhengb18da582015-02-05 15:20:01 +0800590 acpi_ut_get_node_name(gpe_event_info->
591 dispatch.
592 method_node)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593 }
Lin Mingbba63a22010-12-13 13:39:17 +0800594 break;
595
596 default:
Chao Guan1d1ea1b2013-06-08 00:58:14 +0000597
Lv Zhengb18da582015-02-05 15:20:01 +0800598 goto error_exit; /* Should never happen */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700599 }
Lin Ming5a284cd2010-12-13 13:39:07 +0800600
Alexey Starikovskiy17bc54e2007-11-13 13:05:45 +0300601 /* Defer enabling of GPE until all notify handlers are done */
Lin Ming5a284cd2010-12-13 13:39:07 +0800602
603 status = acpi_os_execute(OSL_NOTIFY_HANDLER,
Lv Zhengb18da582015-02-05 15:20:01 +0800604 acpi_ev_asynch_enable_gpe, gpe_event_info);
605 if (ACPI_SUCCESS(status)) {
606 return_VOID;
Lin Ming5a284cd2010-12-13 13:39:07 +0800607 }
Lv Zhengb18da582015-02-05 15:20:01 +0800608
609error_exit:
610 acpi_ev_asynch_enable_gpe(gpe_event_info);
Alexey Starikovskiy17bc54e2007-11-13 13:05:45 +0300611 return_VOID;
612}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613
Lin Mingbba63a22010-12-13 13:39:17 +0800614
Lin Ming5a284cd2010-12-13 13:39:07 +0800615/*******************************************************************************
616 *
617 * FUNCTION: acpi_ev_asynch_enable_gpe
618 *
619 * PARAMETERS: Context (gpe_event_info) - Info for this GPE
620 * Callback from acpi_os_execute
621 *
622 * RETURN: None
623 *
624 * DESCRIPTION: Asynchronous clear/enable for GPE. This allows the GPE to
Lin Mingbba63a22010-12-13 13:39:17 +0800625 * complete (i.e., finish execution of Notify)
Lin Ming5a284cd2010-12-13 13:39:07 +0800626 *
627 ******************************************************************************/
628
629static void ACPI_SYSTEM_XFACE acpi_ev_asynch_enable_gpe(void *context)
Alexey Starikovskiy17bc54e2007-11-13 13:05:45 +0300630{
631 struct acpi_gpe_event_info *gpe_event_info = context;
Lv Zheng7dd88212014-12-02 08:56:55 +0800632 acpi_cpu_flags flags;
Lin Mingbba63a22010-12-13 13:39:17 +0800633
Lv Zheng7dd88212014-12-02 08:56:55 +0800634 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
Lin Mingbba63a22010-12-13 13:39:17 +0800635 (void)acpi_ev_finish_gpe(gpe_event_info);
Lv Zheng7dd88212014-12-02 08:56:55 +0800636 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
Lin Mingbba63a22010-12-13 13:39:17 +0800637
Lin Mingbba63a22010-12-13 13:39:17 +0800638 return;
639}
640
641
642/*******************************************************************************
643 *
644 * FUNCTION: acpi_ev_finish_gpe
645 *
646 * PARAMETERS: gpe_event_info - Info for this GPE
647 *
648 * RETURN: Status
649 *
650 * DESCRIPTION: Clear/Enable a GPE. Common code that is used after execution
651 * of a GPE method or a synchronous or asynchronous GPE handler.
652 *
653 ******************************************************************************/
654
Lv Zhengf19f1a72014-10-10 10:39:39 +0800655acpi_status acpi_ev_finish_gpe(struct acpi_gpe_event_info * gpe_event_info)
Lin Mingbba63a22010-12-13 13:39:17 +0800656{
Alexey Starikovskiy17bc54e2007-11-13 13:05:45 +0300657 acpi_status status;
Lin Ming5a284cd2010-12-13 13:39:07 +0800658
Alexey Starikovskiy17bc54e2007-11-13 13:05:45 +0300659 if ((gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK) ==
Len Brown4be44fc2005-08-05 00:44:28 -0400660 ACPI_GPE_LEVEL_TRIGGERED) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661 /*
Lin Mingbba63a22010-12-13 13:39:17 +0800662 * GPE is level-triggered, we clear the GPE status bit after
663 * handling the event.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664 */
Alexey Starikovskiy17bc54e2007-11-13 13:05:45 +0300665 status = acpi_hw_clear_gpe(gpe_event_info);
Len Brown4be44fc2005-08-05 00:44:28 -0400666 if (ACPI_FAILURE(status)) {
Lin Mingbba63a22010-12-13 13:39:17 +0800667 return (status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668 }
669 }
670
Bob Moorede5668f2010-07-06 10:30:37 +0800671 /*
Lin Mingbba63a22010-12-13 13:39:17 +0800672 * Enable this GPE, conditionally. This means that the GPE will
Rafael J. Wysockic50f13c2014-12-01 23:50:16 +0100673 * only be physically enabled if the enable_mask bit is set
Lin Mingbba63a22010-12-13 13:39:17 +0800674 * in the event_info.
Bob Moorede5668f2010-07-06 10:30:37 +0800675 */
Lin Ming3a378982010-12-13 13:36:15 +0800676 (void)acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_CONDITIONAL_ENABLE);
Lin Mingbba63a22010-12-13 13:39:17 +0800677 return (AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678}
679
Lin Mingbba63a22010-12-13 13:39:17 +0800680
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681/*******************************************************************************
682 *
683 * FUNCTION: acpi_ev_gpe_dispatch
684 *
Lv Zhengf19f1a72014-10-10 10:39:39 +0800685 * PARAMETERS: gpe_device - Device node. NULL for GPE0/GPE1
686 * gpe_event_info - Info for this GPE
687 * gpe_number - Number relative to the parent GPE block
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688 *
689 * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
690 *
691 * DESCRIPTION: Dispatch a General Purpose Event to either a function (e.g. EC)
692 * or method (e.g. _Lxx/_Exx) handler.
693 *
694 * This function executes at interrupt level.
695 *
696 ******************************************************************************/
697
698u32
Lin Ming8b6cd8a2010-12-13 13:38:46 +0800699acpi_ev_gpe_dispatch(struct acpi_namespace_node *gpe_device,
Lv Zhengf19f1a72014-10-10 10:39:39 +0800700 struct acpi_gpe_event_info *gpe_event_info, u32 gpe_number)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701{
Len Brown4be44fc2005-08-05 00:44:28 -0400702 acpi_status status;
Lin Mingbba63a22010-12-13 13:39:17 +0800703 u32 return_value;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704
Bob Mooreb229cf92006-04-21 17:15:00 -0400705 ACPI_FUNCTION_TRACE(ev_gpe_dispatch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706
707 /*
Lin Mingbba63a22010-12-13 13:39:17 +0800708 * Always disable the GPE so that it does not keep firing before
709 * any asynchronous activity completes (either from the execution
710 * of a GPE method or an asynchronous GPE handler.)
711 *
712 * If there is no handler or method to run, just disable the
713 * GPE and leave it disabled permanently to prevent further such
714 * pointless events from firing.
715 */
716 status = acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_DISABLE);
717 if (ACPI_FAILURE(status)) {
718 ACPI_EXCEPTION((AE_INFO, status,
Bob Moore7505da42014-04-30 10:06:15 +0800719 "Unable to disable GPE %02X", gpe_number));
Bob Moorefd1af712013-03-08 09:22:23 +0000720 return_UINT32(ACPI_INTERRUPT_NOT_HANDLED);
Lin Mingbba63a22010-12-13 13:39:17 +0800721 }
722
723 /*
Lv Zheng6ec5e122014-06-15 08:42:31 +0800724 * If edge-triggered, clear the GPE status bit now. Note that
725 * level-triggered events are cleared after the GPE is serviced.
726 */
727 if ((gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK) ==
728 ACPI_GPE_EDGE_TRIGGERED) {
729 status = acpi_hw_clear_gpe(gpe_event_info);
730 if (ACPI_FAILURE(status)) {
731 ACPI_EXCEPTION((AE_INFO, status,
732 "Unable to clear GPE %02X",
733 gpe_number));
734 (void)acpi_hw_low_set_gpe(gpe_event_info,
735 ACPI_GPE_CONDITIONAL_ENABLE);
736 return_UINT32(ACPI_INTERRUPT_NOT_HANDLED);
737 }
738 }
739
740 /*
Lin Mingbba63a22010-12-13 13:39:17 +0800741 * Dispatch the GPE to either an installed handler or the control
742 * method associated with this GPE (_Lxx or _Exx). If a handler
743 * exists, we invoke it and do not attempt to run the method.
744 * If there is neither a handler nor a method, leave the GPE
745 * disabled.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746 */
Lv Zheng7c433122015-02-05 15:20:29 +0800747 switch (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748 case ACPI_GPE_DISPATCH_HANDLER:
749
Lin Mingbba63a22010-12-13 13:39:17 +0800750 /* Invoke the installed handler (at interrupt level) */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751
Lin Mingbba63a22010-12-13 13:39:17 +0800752 return_value =
753 gpe_event_info->dispatch.handler->address(gpe_device,
754 gpe_number,
755 gpe_event_info->
756 dispatch.handler->
757 context);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700758
Lin Mingbba63a22010-12-13 13:39:17 +0800759 /* If requested, clear (if level-triggered) and reenable the GPE */
760
761 if (return_value & ACPI_REENABLE_GPE) {
762 (void)acpi_ev_finish_gpe(gpe_event_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763 }
764 break;
765
766 case ACPI_GPE_DISPATCH_METHOD:
Lin Mingbba63a22010-12-13 13:39:17 +0800767 case ACPI_GPE_DISPATCH_NOTIFY:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768 /*
769 * Execute the method associated with the GPE
770 * NOTE: Level-triggered GPEs are cleared after the method completes.
771 */
Bob Moore958dd242006-05-12 17:12:00 -0400772 status = acpi_os_execute(OSL_GPE_HANDLER,
773 acpi_ev_asynch_execute_gpe_method,
774 gpe_event_info);
Len Brown4be44fc2005-08-05 00:44:28 -0400775 if (ACPI_FAILURE(status)) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500776 ACPI_EXCEPTION((AE_INFO, status,
Bob Moore7505da42014-04-30 10:06:15 +0800777 "Unable to queue handler for GPE %02X - event disabled",
Bob Mooreb8e4d892006-01-27 16:43:00 -0500778 gpe_number));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779 }
780 break;
781
782 default:
Lin Ming0f849d22010-04-06 14:52:37 +0800783 /*
784 * No handler or method to run!
785 * 03/2010: This case should no longer be possible. We will not allow
786 * a GPE to be enabled if it has no handler or method.
787 */
Bob Mooreb8e4d892006-01-27 16:43:00 -0500788 ACPI_ERROR((AE_INFO,
Bob Moore7505da42014-04-30 10:06:15 +0800789 "No handler or method for GPE %02X, disabling event",
Bob Mooreb8e4d892006-01-27 16:43:00 -0500790 gpe_number));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700791
Linus Torvalds1da177e2005-04-16 15:20:36 -0700792 break;
793 }
794
Bob Moorefd1af712013-03-08 09:22:23 +0000795 return_UINT32(ACPI_INTERRUPT_HANDLED);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796}
Bob Moore33620c52012-02-14 18:14:27 +0800797
798#endif /* !ACPI_REDUCED_HARDWARE */