blob: e22f4a973c0fdc4d4cf5670e8ace14d83e75abe1 [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 Moore6c9deb72007-02-02 19:48:24 +03008 * Copyright (C) 2000 - 2007, R. Byron Moore
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>
45#include <acpi/acevents.h>
46#include <acpi/acnamesp.h>
47
48#define _COMPONENT ACPI_EVENTS
Len Brown4be44fc2005-08-05 00:44:28 -040049ACPI_MODULE_NAME("evgpe")
Linus Torvalds1da177e2005-04-16 15:20:36 -070050
Robert Moore44f6c012005-04-18 22:49:35 -040051/* Local prototypes */
Len Brown4be44fc2005-08-05 00:44:28 -040052static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context);
Linus Torvalds1da177e2005-04-16 15:20:36 -070053
54/*******************************************************************************
55 *
56 * FUNCTION: acpi_ev_set_gpe_type
57 *
58 * PARAMETERS: gpe_event_info - GPE to set
59 * Type - New type
60 *
61 * RETURN: Status
62 *
63 * DESCRIPTION: Sets the new type for the GPE (wake, run, or wake/run)
64 *
65 ******************************************************************************/
66
67acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -040068acpi_ev_set_gpe_type(struct acpi_gpe_event_info *gpe_event_info, u8 type)
Linus Torvalds1da177e2005-04-16 15:20:36 -070069{
Len Brown4be44fc2005-08-05 00:44:28 -040070 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -070071
Bob Mooreb229cf92006-04-21 17:15:00 -040072 ACPI_FUNCTION_TRACE(ev_set_gpe_type);
Linus Torvalds1da177e2005-04-16 15:20:36 -070073
74 /* Validate type and update register enable masks */
75
76 switch (type) {
77 case ACPI_GPE_TYPE_WAKE:
78 case ACPI_GPE_TYPE_RUNTIME:
79 case ACPI_GPE_TYPE_WAKE_RUN:
80 break;
81
82 default:
Len Brown4be44fc2005-08-05 00:44:28 -040083 return_ACPI_STATUS(AE_BAD_PARAMETER);
Linus Torvalds1da177e2005-04-16 15:20:36 -070084 }
85
86 /* Disable the GPE if currently enabled */
87
Len Brown4be44fc2005-08-05 00:44:28 -040088 status = acpi_ev_disable_gpe(gpe_event_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -070089
90 /* Type was validated above */
91
Len Brown4be44fc2005-08-05 00:44:28 -040092 gpe_event_info->flags &= ~ACPI_GPE_TYPE_MASK; /* Clear type bits */
93 gpe_event_info->flags |= type; /* Insert type */
94 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -070095}
96
Linus Torvalds1da177e2005-04-16 15:20:36 -070097/*******************************************************************************
98 *
99 * FUNCTION: acpi_ev_update_gpe_enable_masks
100 *
101 * PARAMETERS: gpe_event_info - GPE to update
102 * Type - What to do: ACPI_GPE_DISABLE or
103 * ACPI_GPE_ENABLE
104 *
105 * RETURN: Status
106 *
107 * DESCRIPTION: Updates GPE register enable masks based on the GPE type
108 *
109 ******************************************************************************/
110
111acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -0400112acpi_ev_update_gpe_enable_masks(struct acpi_gpe_event_info *gpe_event_info,
113 u8 type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114{
Len Brown4be44fc2005-08-05 00:44:28 -0400115 struct acpi_gpe_register_info *gpe_register_info;
116 u8 register_bit;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117
Bob Mooreb229cf92006-04-21 17:15:00 -0400118 ACPI_FUNCTION_TRACE(ev_update_gpe_enable_masks);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119
120 gpe_register_info = gpe_event_info->register_info;
121 if (!gpe_register_info) {
Len Brown4be44fc2005-08-05 00:44:28 -0400122 return_ACPI_STATUS(AE_NOT_EXIST);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123 }
Alexey Starikovskiy69874162007-02-02 19:48:19 +0300124 register_bit = (u8)
125 (1 <<
126 (gpe_event_info->gpe_number - gpe_register_info->base_gpe_number));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127
128 /* 1) Disable case. Simply clear all enable bits */
129
130 if (type == ACPI_GPE_DISABLE) {
Len Brown4be44fc2005-08-05 00:44:28 -0400131 ACPI_CLEAR_BIT(gpe_register_info->enable_for_wake,
132 register_bit);
133 ACPI_CLEAR_BIT(gpe_register_info->enable_for_run, register_bit);
134 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135 }
136
137 /* 2) Enable case. Set/Clear the appropriate enable bits */
138
139 switch (gpe_event_info->flags & ACPI_GPE_TYPE_MASK) {
140 case ACPI_GPE_TYPE_WAKE:
Len Brown4be44fc2005-08-05 00:44:28 -0400141 ACPI_SET_BIT(gpe_register_info->enable_for_wake, register_bit);
142 ACPI_CLEAR_BIT(gpe_register_info->enable_for_run, register_bit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143 break;
144
145 case ACPI_GPE_TYPE_RUNTIME:
Len Brown4be44fc2005-08-05 00:44:28 -0400146 ACPI_CLEAR_BIT(gpe_register_info->enable_for_wake,
147 register_bit);
148 ACPI_SET_BIT(gpe_register_info->enable_for_run, register_bit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149 break;
150
151 case ACPI_GPE_TYPE_WAKE_RUN:
Len Brown4be44fc2005-08-05 00:44:28 -0400152 ACPI_SET_BIT(gpe_register_info->enable_for_wake, register_bit);
153 ACPI_SET_BIT(gpe_register_info->enable_for_run, register_bit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154 break;
155
156 default:
Len Brown4be44fc2005-08-05 00:44:28 -0400157 return_ACPI_STATUS(AE_BAD_PARAMETER);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 }
159
Len Brown4be44fc2005-08-05 00:44:28 -0400160 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161}
162
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163/*******************************************************************************
164 *
165 * FUNCTION: acpi_ev_enable_gpe
166 *
167 * PARAMETERS: gpe_event_info - GPE to enable
168 * write_to_hardware - Enable now, or just mark data structs
169 * (WAKE GPEs should be deferred)
170 *
171 * RETURN: Status
172 *
173 * DESCRIPTION: Enable a GPE based on the GPE type
174 *
175 ******************************************************************************/
176
177acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -0400178acpi_ev_enable_gpe(struct acpi_gpe_event_info *gpe_event_info,
179 u8 write_to_hardware)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180{
Len Brown4be44fc2005-08-05 00:44:28 -0400181 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182
Bob Mooreb229cf92006-04-21 17:15:00 -0400183 ACPI_FUNCTION_TRACE(ev_enable_gpe);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184
185 /* Make sure HW enable masks are updated */
186
Len Brown4be44fc2005-08-05 00:44:28 -0400187 status =
188 acpi_ev_update_gpe_enable_masks(gpe_event_info, ACPI_GPE_ENABLE);
189 if (ACPI_FAILURE(status)) {
190 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191 }
192
193 /* Mark wake-enabled or HW enable, or both */
194
195 switch (gpe_event_info->flags & ACPI_GPE_TYPE_MASK) {
196 case ACPI_GPE_TYPE_WAKE:
197
Len Brown4be44fc2005-08-05 00:44:28 -0400198 ACPI_SET_BIT(gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 break;
200
201 case ACPI_GPE_TYPE_WAKE_RUN:
202
Len Brown4be44fc2005-08-05 00:44:28 -0400203 ACPI_SET_BIT(gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204
205 /*lint -fallthrough */
206
207 case ACPI_GPE_TYPE_RUNTIME:
208
Len Brown4be44fc2005-08-05 00:44:28 -0400209 ACPI_SET_BIT(gpe_event_info->flags, ACPI_GPE_RUN_ENABLED);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210
211 if (write_to_hardware) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400212
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 /* Clear the GPE (of stale events), then enable it */
214
Len Brown4be44fc2005-08-05 00:44:28 -0400215 status = acpi_hw_clear_gpe(gpe_event_info);
216 if (ACPI_FAILURE(status)) {
217 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218 }
219
220 /* Enable the requested runtime GPE */
221
Len Brown4be44fc2005-08-05 00:44:28 -0400222 status = acpi_hw_write_gpe_enable_reg(gpe_event_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223 }
224 break;
225
226 default:
Len Brown4be44fc2005-08-05 00:44:28 -0400227 return_ACPI_STATUS(AE_BAD_PARAMETER);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228 }
229
Len Brown4be44fc2005-08-05 00:44:28 -0400230 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231}
232
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233/*******************************************************************************
234 *
235 * FUNCTION: acpi_ev_disable_gpe
236 *
237 * PARAMETERS: gpe_event_info - GPE to disable
238 *
239 * RETURN: Status
240 *
241 * DESCRIPTION: Disable a GPE based on the GPE type
242 *
243 ******************************************************************************/
244
Len Brown4be44fc2005-08-05 00:44:28 -0400245acpi_status acpi_ev_disable_gpe(struct acpi_gpe_event_info *gpe_event_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246{
Len Brown4be44fc2005-08-05 00:44:28 -0400247 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248
Bob Mooreb229cf92006-04-21 17:15:00 -0400249 ACPI_FUNCTION_TRACE(ev_disable_gpe);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250
251 if (!(gpe_event_info->flags & ACPI_GPE_ENABLE_MASK)) {
Len Brown4be44fc2005-08-05 00:44:28 -0400252 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 }
254
255 /* Make sure HW enable masks are updated */
256
Len Brown4be44fc2005-08-05 00:44:28 -0400257 status =
258 acpi_ev_update_gpe_enable_masks(gpe_event_info, ACPI_GPE_DISABLE);
259 if (ACPI_FAILURE(status)) {
260 return_ACPI_STATUS(status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261 }
262
263 /* Mark wake-disabled or HW disable, or both */
264
265 switch (gpe_event_info->flags & ACPI_GPE_TYPE_MASK) {
266 case ACPI_GPE_TYPE_WAKE:
Len Brown4be44fc2005-08-05 00:44:28 -0400267 ACPI_CLEAR_BIT(gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 break;
269
270 case ACPI_GPE_TYPE_WAKE_RUN:
Len Brown4be44fc2005-08-05 00:44:28 -0400271 ACPI_CLEAR_BIT(gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272
273 /*lint -fallthrough */
274
275 case ACPI_GPE_TYPE_RUNTIME:
276
277 /* Disable the requested runtime GPE */
278
Len Brown4be44fc2005-08-05 00:44:28 -0400279 ACPI_CLEAR_BIT(gpe_event_info->flags, ACPI_GPE_RUN_ENABLED);
280 status = acpi_hw_write_gpe_enable_reg(gpe_event_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281 break;
282
283 default:
Len Brown4be44fc2005-08-05 00:44:28 -0400284 return_ACPI_STATUS(AE_BAD_PARAMETER);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285 }
286
Len Brown4be44fc2005-08-05 00:44:28 -0400287 return_ACPI_STATUS(AE_OK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288}
289
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290/*******************************************************************************
291 *
292 * FUNCTION: acpi_ev_get_gpe_event_info
293 *
294 * PARAMETERS: gpe_device - Device node. NULL for GPE0/GPE1
295 * gpe_number - Raw GPE number
296 *
297 * RETURN: A GPE event_info struct. NULL if not a valid GPE
298 *
299 * DESCRIPTION: Returns the event_info struct associated with this GPE.
300 * Validates the gpe_block and the gpe_number
301 *
302 * Should be called only when the GPE lists are semaphore locked
303 * and not subject to change.
304 *
305 ******************************************************************************/
306
Len Brown4be44fc2005-08-05 00:44:28 -0400307struct acpi_gpe_event_info *acpi_ev_get_gpe_event_info(acpi_handle gpe_device,
308 u32 gpe_number)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309{
Len Brown4be44fc2005-08-05 00:44:28 -0400310 union acpi_operand_object *obj_desc;
311 struct acpi_gpe_block_info *gpe_block;
312 acpi_native_uint i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313
Len Brown4be44fc2005-08-05 00:44:28 -0400314 ACPI_FUNCTION_ENTRY();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315
316 /* A NULL gpe_block means use the FADT-defined GPE block(s) */
317
318 if (!gpe_device) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400319
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320 /* Examine GPE Block 0 and 1 (These blocks are permanent) */
321
322 for (i = 0; i < ACPI_MAX_GPE_BLOCKS; i++) {
323 gpe_block = acpi_gbl_gpe_fadt_blocks[i];
324 if (gpe_block) {
Len Brown4be44fc2005-08-05 00:44:28 -0400325 if ((gpe_number >= gpe_block->block_base_number)
326 && (gpe_number <
327 gpe_block->block_base_number +
328 (gpe_block->register_count * 8))) {
329 return (&gpe_block->
330 event_info[gpe_number -
331 gpe_block->
332 block_base_number]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333 }
334 }
335 }
336
337 /* The gpe_number was not in the range of either FADT GPE block */
338
339 return (NULL);
340 }
341
342 /* A Non-NULL gpe_device means this is a GPE Block Device */
343
Len Brownfd350942007-05-09 23:34:35 -0400344 obj_desc = acpi_ns_get_attached_object((struct acpi_namespace_node *)
345 gpe_device);
Len Brown4be44fc2005-08-05 00:44:28 -0400346 if (!obj_desc || !obj_desc->device.gpe_block) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347 return (NULL);
348 }
349
350 gpe_block = obj_desc->device.gpe_block;
351
352 if ((gpe_number >= gpe_block->block_base_number) &&
Len Brown4be44fc2005-08-05 00:44:28 -0400353 (gpe_number <
354 gpe_block->block_base_number + (gpe_block->register_count * 8))) {
355 return (&gpe_block->
356 event_info[gpe_number - gpe_block->block_base_number]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357 }
358
359 return (NULL);
360}
361
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362/*******************************************************************************
363 *
364 * FUNCTION: acpi_ev_gpe_detect
365 *
366 * PARAMETERS: gpe_xrupt_list - Interrupt block for this interrupt.
367 * Can have multiple GPE blocks attached.
368 *
369 * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
370 *
371 * DESCRIPTION: Detect if any GP events have occurred. This function is
372 * executed at interrupt level.
373 *
374 ******************************************************************************/
375
Len Brown4be44fc2005-08-05 00:44:28 -0400376u32 acpi_ev_gpe_detect(struct acpi_gpe_xrupt_info * gpe_xrupt_list)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377{
Len Brown4be44fc2005-08-05 00:44:28 -0400378 acpi_status status;
379 struct acpi_gpe_block_info *gpe_block;
Bob Moore08978312005-10-21 00:00:00 -0400380 struct acpi_gpe_register_info *gpe_register_info;
381 u32 int_status = ACPI_INTERRUPT_NOT_HANDLED;
382 u8 enabled_status_byte;
383 u32 status_reg;
384 u32 enable_reg;
Bob Mooreb8e4d892006-01-27 16:43:00 -0500385 acpi_cpu_flags flags;
Len Brown4be44fc2005-08-05 00:44:28 -0400386 acpi_native_uint i;
387 acpi_native_uint j;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388
Bob Mooreb229cf92006-04-21 17:15:00 -0400389 ACPI_FUNCTION_NAME(ev_gpe_detect);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390
391 /* Check for the case where there are no GPEs */
392
393 if (!gpe_xrupt_list) {
394 return (int_status);
395 }
396
Bob Moore967440e32006-06-23 17:04:00 -0400397 /*
398 * We need to obtain the GPE lock for both the data structs and registers
399 * Note: Not necessary to obtain the hardware lock, since the GPE registers
400 * are owned by the gpe_lock.
401 */
Len Brown4be44fc2005-08-05 00:44:28 -0400402 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
Bob Moore4c90ece2006-06-08 16:29:00 -0400403
404 /* Examine all GPE blocks attached to this interrupt level */
405
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 gpe_block = gpe_xrupt_list->gpe_block_list_head;
407 while (gpe_block) {
408 /*
409 * Read all of the 8-bit GPE status and enable registers
410 * in this GPE block, saving all of them.
411 * Find all currently active GP events.
412 */
413 for (i = 0; i < gpe_block->register_count; i++) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400414
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415 /* Get the next status/enable pair */
416
417 gpe_register_info = &gpe_block->register_info[i];
418
419 /* Read the Status Register */
420
Len Brown4be44fc2005-08-05 00:44:28 -0400421 status =
422 acpi_hw_low_level_read(ACPI_GPE_REGISTER_WIDTH,
423 &status_reg,
424 &gpe_register_info->
425 status_address);
426 if (ACPI_FAILURE(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427 goto unlock_and_exit;
428 }
429
430 /* Read the Enable Register */
431
Len Brown4be44fc2005-08-05 00:44:28 -0400432 status =
433 acpi_hw_low_level_read(ACPI_GPE_REGISTER_WIDTH,
434 &enable_reg,
435 &gpe_register_info->
436 enable_address);
437 if (ACPI_FAILURE(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438 goto unlock_and_exit;
439 }
440
Len Brown4be44fc2005-08-05 00:44:28 -0400441 ACPI_DEBUG_PRINT((ACPI_DB_INTERRUPTS,
442 "Read GPE Register at GPE%X: Status=%02X, Enable=%02X\n",
443 gpe_register_info->base_gpe_number,
444 status_reg, enable_reg));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445
Robert Moore44f6c012005-04-18 22:49:35 -0400446 /* Check if there is anything active at all in this register */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447
448 enabled_status_byte = (u8) (status_reg & enable_reg);
449 if (!enabled_status_byte) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400450
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451 /* No active GPEs in this register, move on */
452
453 continue;
454 }
455
456 /* Now look at the individual GPEs in this byte register */
457
458 for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) {
Bob Moore52fc0b02006-10-02 00:00:00 -0400459
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460 /* Examine one GPE bit */
461
Alexey Starikovskiy69874162007-02-02 19:48:19 +0300462 if (enabled_status_byte & (1 << j)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463 /*
464 * Found an active GPE. Dispatch the event to a handler
465 * or method.
466 */
Len Brown4be44fc2005-08-05 00:44:28 -0400467 int_status |=
468 acpi_ev_gpe_dispatch(&gpe_block->
469 event_info[(i *
470 ACPI_GPE_REGISTER_WIDTH)
471 +
472 j],
473 (u32) j +
474 gpe_register_info->
475 base_gpe_number);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476 }
477 }
478 }
479
480 gpe_block = gpe_block->next;
481 }
482
Len Brown4be44fc2005-08-05 00:44:28 -0400483 unlock_and_exit:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484
Len Brown4be44fc2005-08-05 00:44:28 -0400485 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486 return (int_status);
487}
488
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489/*******************************************************************************
490 *
491 * FUNCTION: acpi_ev_asynch_execute_gpe_method
492 *
493 * PARAMETERS: Context (gpe_event_info) - Info for this GPE
494 *
495 * RETURN: None
496 *
Bob Moore41195322006-05-26 16:36:00 -0400497 * DESCRIPTION: Perform the actual execution of a GPE control method. This
498 * function is called from an invocation of acpi_os_execute and
499 * therefore does NOT execute at interrupt level - so that
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500 * the control method itself is not executed in the context of
501 * an interrupt handler.
502 *
503 ******************************************************************************/
504
Len Brown4be44fc2005-08-05 00:44:28 -0400505static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506{
Len Brown4be44fc2005-08-05 00:44:28 -0400507 struct acpi_gpe_event_info *gpe_event_info = (void *)context;
Len Brown4be44fc2005-08-05 00:44:28 -0400508 acpi_status status;
509 struct acpi_gpe_event_info local_gpe_event_info;
Bob Moore41195322006-05-26 16:36:00 -0400510 struct acpi_evaluate_info *info;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511
Bob Mooreb229cf92006-04-21 17:15:00 -0400512 ACPI_FUNCTION_TRACE(ev_asynch_execute_gpe_method);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513
Len Brown4be44fc2005-08-05 00:44:28 -0400514 status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
515 if (ACPI_FAILURE(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516 return_VOID;
517 }
518
519 /* Must revalidate the gpe_number/gpe_block */
520
Len Brown4be44fc2005-08-05 00:44:28 -0400521 if (!acpi_ev_valid_gpe_event(gpe_event_info)) {
522 status = acpi_ut_release_mutex(ACPI_MTX_EVENTS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523 return_VOID;
524 }
525
526 /* Set the GPE flags for return to enabled state */
527
Len Brown4be44fc2005-08-05 00:44:28 -0400528 (void)acpi_ev_enable_gpe(gpe_event_info, FALSE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529
530 /*
531 * Take a snapshot of the GPE info for this level - we copy the
532 * info to prevent a race condition with remove_handler/remove_block.
533 */
Len Brown4be44fc2005-08-05 00:44:28 -0400534 ACPI_MEMCPY(&local_gpe_event_info, gpe_event_info,
535 sizeof(struct acpi_gpe_event_info));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536
Len Brown4be44fc2005-08-05 00:44:28 -0400537 status = acpi_ut_release_mutex(ACPI_MTX_EVENTS);
538 if (ACPI_FAILURE(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539 return_VOID;
540 }
541
542 /*
543 * Must check for control method type dispatch one more
544 * time to avoid race with ev_gpe_install_handler
545 */
Robert Moore44f6c012005-04-18 22:49:35 -0400546 if ((local_gpe_event_info.flags & ACPI_GPE_DISPATCH_MASK) ==
Len Brown4be44fc2005-08-05 00:44:28 -0400547 ACPI_GPE_DISPATCH_METHOD) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548
Bob Moore41195322006-05-26 16:36:00 -0400549 /* Allocate the evaluation information block */
550
551 info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info));
552 if (!info) {
553 status = AE_NO_MEMORY;
554 } else {
555 /*
556 * Invoke the GPE Method (_Lxx, _Exx) i.e., evaluate the _Lxx/_Exx
557 * control method that corresponds to this GPE
558 */
559 info->prefix_node =
560 local_gpe_event_info.dispatch.method_node;
561 info->parameters =
562 ACPI_CAST_PTR(union acpi_operand_object *,
563 gpe_event_info);
564 info->parameter_type = ACPI_PARAM_GPE;
565 info->flags = ACPI_IGNORE_RETURN_VALUE;
566
567 status = acpi_ns_evaluate(info);
568 ACPI_FREE(info);
569 }
570
Len Brown4be44fc2005-08-05 00:44:28 -0400571 if (ACPI_FAILURE(status)) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500572 ACPI_EXCEPTION((AE_INFO, status,
Bob Moore2e420052007-02-02 19:48:18 +0300573 "while evaluating GPE method [%4.4s]",
Bob Mooreb8e4d892006-01-27 16:43:00 -0500574 acpi_ut_get_node_name
575 (local_gpe_event_info.dispatch.
Bob Moore4c90ece2006-06-08 16:29:00 -0400576 method_node)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577 }
578 }
579
Robert Moore44f6c012005-04-18 22:49:35 -0400580 if ((local_gpe_event_info.flags & ACPI_GPE_XRUPT_TYPE_MASK) ==
Len Brown4be44fc2005-08-05 00:44:28 -0400581 ACPI_GPE_LEVEL_TRIGGERED) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582 /*
583 * GPE is level-triggered, we clear the GPE status bit after
584 * handling the event.
585 */
Len Brown4be44fc2005-08-05 00:44:28 -0400586 status = acpi_hw_clear_gpe(&local_gpe_event_info);
587 if (ACPI_FAILURE(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588 return_VOID;
589 }
590 }
591
592 /* Enable this GPE */
593
Len Brown4be44fc2005-08-05 00:44:28 -0400594 (void)acpi_hw_write_gpe_enable_reg(&local_gpe_event_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595 return_VOID;
596}
597
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598/*******************************************************************************
599 *
600 * FUNCTION: acpi_ev_gpe_dispatch
601 *
Robert Moore44f6c012005-04-18 22:49:35 -0400602 * PARAMETERS: gpe_event_info - Info for this GPE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603 * gpe_number - Number relative to the parent GPE block
604 *
605 * RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
606 *
607 * DESCRIPTION: Dispatch a General Purpose Event to either a function (e.g. EC)
608 * or method (e.g. _Lxx/_Exx) handler.
609 *
610 * This function executes at interrupt level.
611 *
612 ******************************************************************************/
613
614u32
Len Brown4be44fc2005-08-05 00:44:28 -0400615acpi_ev_gpe_dispatch(struct acpi_gpe_event_info *gpe_event_info, u32 gpe_number)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616{
Len Brown4be44fc2005-08-05 00:44:28 -0400617 acpi_status status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618
Bob Mooreb229cf92006-04-21 17:15:00 -0400619 ACPI_FUNCTION_TRACE(ev_gpe_dispatch);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620
Bob Moorefdffb722007-02-02 19:48:19 +0300621 acpi_gpe_count++;
622
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623 /*
624 * If edge-triggered, clear the GPE status bit now. Note that
625 * level-triggered events are cleared after the GPE is serviced.
626 */
Robert Moore44f6c012005-04-18 22:49:35 -0400627 if ((gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK) ==
Len Brown4be44fc2005-08-05 00:44:28 -0400628 ACPI_GPE_EDGE_TRIGGERED) {
629 status = acpi_hw_clear_gpe(gpe_event_info);
630 if (ACPI_FAILURE(status)) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500631 ACPI_EXCEPTION((AE_INFO, status,
632 "Unable to clear GPE[%2X]",
633 gpe_number));
Bob Moore50eca3e2005-09-30 19:03:00 -0400634 return_UINT32(ACPI_INTERRUPT_NOT_HANDLED);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635 }
636 }
637
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638 /*
Bob Moorec5a71562007-02-02 19:48:19 +0300639 * Dispatch the GPE to either an installed handler, or the control method
640 * associated with this GPE (_Lxx or _Exx). If a handler exists, we invoke
641 * it and do not attempt to run the method. If there is neither a handler
642 * nor a method, we disable this GPE to prevent further such pointless
643 * events from firing.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644 */
645 switch (gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) {
646 case ACPI_GPE_DISPATCH_HANDLER:
647
648 /*
649 * Invoke the installed handler (at interrupt level)
650 * Ignore return status for now. TBD: leave GPE disabled on error?
651 */
Len Brown4be44fc2005-08-05 00:44:28 -0400652 (void)gpe_event_info->dispatch.handler->address(gpe_event_info->
653 dispatch.
654 handler->
655 context);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656
657 /* It is now safe to clear level-triggered events. */
658
Robert Moore44f6c012005-04-18 22:49:35 -0400659 if ((gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK) ==
Len Brown4be44fc2005-08-05 00:44:28 -0400660 ACPI_GPE_LEVEL_TRIGGERED) {
661 status = acpi_hw_clear_gpe(gpe_event_info);
662 if (ACPI_FAILURE(status)) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500663 ACPI_EXCEPTION((AE_INFO, status,
664 "Unable to clear GPE[%2X]",
665 gpe_number));
Bob Moore50eca3e2005-09-30 19:03:00 -0400666 return_UINT32(ACPI_INTERRUPT_NOT_HANDLED);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667 }
668 }
669 break;
670
671 case ACPI_GPE_DISPATCH_METHOD:
672
673 /*
Bob Moorec5a71562007-02-02 19:48:19 +0300674 * Disable the GPE, so it doesn't keep firing before the method has a
675 * chance to run (it runs asynchronously with interrupts enabled).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676 */
Len Brown4be44fc2005-08-05 00:44:28 -0400677 status = acpi_ev_disable_gpe(gpe_event_info);
678 if (ACPI_FAILURE(status)) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500679 ACPI_EXCEPTION((AE_INFO, status,
680 "Unable to disable GPE[%2X]",
681 gpe_number));
Bob Moore50eca3e2005-09-30 19:03:00 -0400682 return_UINT32(ACPI_INTERRUPT_NOT_HANDLED);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683 }
684
685 /*
686 * Execute the method associated with the GPE
687 * NOTE: Level-triggered GPEs are cleared after the method completes.
688 */
Bob Moore958dd242006-05-12 17:12:00 -0400689 status = acpi_os_execute(OSL_GPE_HANDLER,
690 acpi_ev_asynch_execute_gpe_method,
691 gpe_event_info);
Len Brown4be44fc2005-08-05 00:44:28 -0400692 if (ACPI_FAILURE(status)) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500693 ACPI_EXCEPTION((AE_INFO, status,
694 "Unable to queue handler for GPE[%2X] - event disabled",
695 gpe_number));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696 }
697 break;
698
699 default:
700
701 /* No handler or method to run! */
702
Bob Mooreb8e4d892006-01-27 16:43:00 -0500703 ACPI_ERROR((AE_INFO,
704 "No handler or method for GPE[%2X], disabling event",
705 gpe_number));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706
707 /*
Bob Moorec5a71562007-02-02 19:48:19 +0300708 * Disable the GPE. The GPE will remain disabled until the ACPI
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709 * Core Subsystem is restarted, or a handler is installed.
710 */
Len Brown4be44fc2005-08-05 00:44:28 -0400711 status = acpi_ev_disable_gpe(gpe_event_info);
712 if (ACPI_FAILURE(status)) {
Bob Mooreb8e4d892006-01-27 16:43:00 -0500713 ACPI_EXCEPTION((AE_INFO, status,
714 "Unable to disable GPE[%2X]",
715 gpe_number));
Bob Moore50eca3e2005-09-30 19:03:00 -0400716 return_UINT32(ACPI_INTERRUPT_NOT_HANDLED);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717 }
718 break;
719 }
720
Bob Moore50eca3e2005-09-30 19:03:00 -0400721 return_UINT32(ACPI_INTERRUPT_HANDLED);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722}