Commit | Line | Data |
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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: evgpe - General Purpose Event handling and dispatch | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
6c9deb72 | 8 | * Copyright (C) 2000 - 2007, R. Byron Moore |
1da177e4 LT |
9 | * 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 | |
4be44fcd | 49 | ACPI_MODULE_NAME("evgpe") |
1da177e4 | 50 | |
44f6c012 | 51 | /* Local prototypes */ |
4be44fcd | 52 | static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context); |
1da177e4 LT |
53 | |
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 | ||
67 | acpi_status | |
4be44fcd | 68 | acpi_ev_set_gpe_type(struct acpi_gpe_event_info *gpe_event_info, u8 type) |
1da177e4 | 69 | { |
4be44fcd | 70 | acpi_status status; |
1da177e4 | 71 | |
b229cf92 | 72 | ACPI_FUNCTION_TRACE(ev_set_gpe_type); |
1da177e4 LT |
73 | |
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: | |
4be44fcd | 83 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
84 | } |
85 | ||
86 | /* Disable the GPE if currently enabled */ | |
87 | ||
4be44fcd | 88 | status = acpi_ev_disable_gpe(gpe_event_info); |
1da177e4 LT |
89 | |
90 | /* Type was validated above */ | |
91 | ||
4be44fcd LB |
92 | gpe_event_info->flags &= ~ACPI_GPE_TYPE_MASK; /* Clear type bits */ |
93 | gpe_event_info->flags |= type; /* Insert type */ | |
94 | return_ACPI_STATUS(status); | |
1da177e4 LT |
95 | } |
96 | ||
1da177e4 LT |
97 | /******************************************************************************* |
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 | ||
111 | acpi_status | |
4be44fcd LB |
112 | acpi_ev_update_gpe_enable_masks(struct acpi_gpe_event_info *gpe_event_info, |
113 | u8 type) | |
1da177e4 | 114 | { |
4be44fcd LB |
115 | struct acpi_gpe_register_info *gpe_register_info; |
116 | u8 register_bit; | |
1da177e4 | 117 | |
b229cf92 | 118 | ACPI_FUNCTION_TRACE(ev_update_gpe_enable_masks); |
1da177e4 LT |
119 | |
120 | gpe_register_info = gpe_event_info->register_info; | |
121 | if (!gpe_register_info) { | |
4be44fcd | 122 | return_ACPI_STATUS(AE_NOT_EXIST); |
1da177e4 | 123 | } |
69874165 AS |
124 | register_bit = (u8) |
125 | (1 << | |
126 | (gpe_event_info->gpe_number - gpe_register_info->base_gpe_number)); | |
1da177e4 LT |
127 | |
128 | /* 1) Disable case. Simply clear all enable bits */ | |
129 | ||
130 | if (type == ACPI_GPE_DISABLE) { | |
4be44fcd LB |
131 | 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); | |
1da177e4 LT |
135 | } |
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: | |
4be44fcd LB |
141 | ACPI_SET_BIT(gpe_register_info->enable_for_wake, register_bit); |
142 | ACPI_CLEAR_BIT(gpe_register_info->enable_for_run, register_bit); | |
1da177e4 LT |
143 | break; |
144 | ||
145 | case ACPI_GPE_TYPE_RUNTIME: | |
4be44fcd LB |
146 | ACPI_CLEAR_BIT(gpe_register_info->enable_for_wake, |
147 | register_bit); | |
148 | ACPI_SET_BIT(gpe_register_info->enable_for_run, register_bit); | |
1da177e4 LT |
149 | break; |
150 | ||
151 | case ACPI_GPE_TYPE_WAKE_RUN: | |
4be44fcd LB |
152 | ACPI_SET_BIT(gpe_register_info->enable_for_wake, register_bit); |
153 | ACPI_SET_BIT(gpe_register_info->enable_for_run, register_bit); | |
1da177e4 LT |
154 | break; |
155 | ||
156 | default: | |
4be44fcd | 157 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
158 | } |
159 | ||
4be44fcd | 160 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
161 | } |
162 | ||
1da177e4 LT |
163 | /******************************************************************************* |
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 | ||
177 | acpi_status | |
4be44fcd LB |
178 | acpi_ev_enable_gpe(struct acpi_gpe_event_info *gpe_event_info, |
179 | u8 write_to_hardware) | |
1da177e4 | 180 | { |
4be44fcd | 181 | acpi_status status; |
1da177e4 | 182 | |
b229cf92 | 183 | ACPI_FUNCTION_TRACE(ev_enable_gpe); |
1da177e4 LT |
184 | |
185 | /* Make sure HW enable masks are updated */ | |
186 | ||
4be44fcd LB |
187 | status = |
188 | acpi_ev_update_gpe_enable_masks(gpe_event_info, ACPI_GPE_ENABLE); | |
189 | if (ACPI_FAILURE(status)) { | |
190 | return_ACPI_STATUS(status); | |
1da177e4 LT |
191 | } |
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 | ||
4be44fcd | 198 | ACPI_SET_BIT(gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED); |
1da177e4 LT |
199 | break; |
200 | ||
201 | case ACPI_GPE_TYPE_WAKE_RUN: | |
202 | ||
4be44fcd | 203 | ACPI_SET_BIT(gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED); |
1da177e4 LT |
204 | |
205 | /*lint -fallthrough */ | |
206 | ||
207 | case ACPI_GPE_TYPE_RUNTIME: | |
208 | ||
4be44fcd | 209 | ACPI_SET_BIT(gpe_event_info->flags, ACPI_GPE_RUN_ENABLED); |
1da177e4 LT |
210 | |
211 | if (write_to_hardware) { | |
52fc0b02 | 212 | |
1da177e4 LT |
213 | /* Clear the GPE (of stale events), then enable it */ |
214 | ||
4be44fcd LB |
215 | status = acpi_hw_clear_gpe(gpe_event_info); |
216 | if (ACPI_FAILURE(status)) { | |
217 | return_ACPI_STATUS(status); | |
1da177e4 LT |
218 | } |
219 | ||
220 | /* Enable the requested runtime GPE */ | |
221 | ||
4be44fcd | 222 | status = acpi_hw_write_gpe_enable_reg(gpe_event_info); |
1da177e4 LT |
223 | } |
224 | break; | |
225 | ||
226 | default: | |
4be44fcd | 227 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
228 | } |
229 | ||
4be44fcd | 230 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
231 | } |
232 | ||
1da177e4 LT |
233 | /******************************************************************************* |
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 | ||
4be44fcd | 245 | acpi_status acpi_ev_disable_gpe(struct acpi_gpe_event_info *gpe_event_info) |
1da177e4 | 246 | { |
4be44fcd | 247 | acpi_status status; |
1da177e4 | 248 | |
b229cf92 | 249 | ACPI_FUNCTION_TRACE(ev_disable_gpe); |
1da177e4 LT |
250 | |
251 | if (!(gpe_event_info->flags & ACPI_GPE_ENABLE_MASK)) { | |
4be44fcd | 252 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
253 | } |
254 | ||
255 | /* Make sure HW enable masks are updated */ | |
256 | ||
4be44fcd LB |
257 | status = |
258 | acpi_ev_update_gpe_enable_masks(gpe_event_info, ACPI_GPE_DISABLE); | |
259 | if (ACPI_FAILURE(status)) { | |
260 | return_ACPI_STATUS(status); | |
1da177e4 LT |
261 | } |
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: | |
4be44fcd | 267 | ACPI_CLEAR_BIT(gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED); |
1da177e4 LT |
268 | break; |
269 | ||
270 | case ACPI_GPE_TYPE_WAKE_RUN: | |
4be44fcd | 271 | ACPI_CLEAR_BIT(gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED); |
1da177e4 LT |
272 | |
273 | /*lint -fallthrough */ | |
274 | ||
275 | case ACPI_GPE_TYPE_RUNTIME: | |
276 | ||
277 | /* Disable the requested runtime GPE */ | |
278 | ||
4be44fcd LB |
279 | ACPI_CLEAR_BIT(gpe_event_info->flags, ACPI_GPE_RUN_ENABLED); |
280 | status = acpi_hw_write_gpe_enable_reg(gpe_event_info); | |
1da177e4 LT |
281 | break; |
282 | ||
283 | default: | |
4be44fcd | 284 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
285 | } |
286 | ||
4be44fcd | 287 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
288 | } |
289 | ||
1da177e4 LT |
290 | /******************************************************************************* |
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 | ||
4be44fcd LB |
307 | struct acpi_gpe_event_info *acpi_ev_get_gpe_event_info(acpi_handle gpe_device, |
308 | u32 gpe_number) | |
1da177e4 | 309 | { |
4be44fcd LB |
310 | union acpi_operand_object *obj_desc; |
311 | struct acpi_gpe_block_info *gpe_block; | |
312 | acpi_native_uint i; | |
1da177e4 | 313 | |
4be44fcd | 314 | ACPI_FUNCTION_ENTRY(); |
1da177e4 LT |
315 | |
316 | /* A NULL gpe_block means use the FADT-defined GPE block(s) */ | |
317 | ||
318 | if (!gpe_device) { | |
52fc0b02 | 319 | |
1da177e4 LT |
320 | /* 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) { | |
4be44fcd LB |
325 | 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]); | |
1da177e4 LT |
333 | } |
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 | ||
fd350943 LB |
344 | obj_desc = acpi_ns_get_attached_object((struct acpi_namespace_node *) |
345 | gpe_device); | |
4be44fcd | 346 | if (!obj_desc || !obj_desc->device.gpe_block) { |
1da177e4 LT |
347 | return (NULL); |
348 | } | |
349 | ||
350 | gpe_block = obj_desc->device.gpe_block; | |
351 | ||
352 | if ((gpe_number >= gpe_block->block_base_number) && | |
4be44fcd LB |
353 | (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]); | |
1da177e4 LT |
357 | } |
358 | ||
359 | return (NULL); | |
360 | } | |
361 | ||
1da177e4 LT |
362 | /******************************************************************************* |
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 | ||
4be44fcd | 376 | u32 acpi_ev_gpe_detect(struct acpi_gpe_xrupt_info * gpe_xrupt_list) |
1da177e4 | 377 | { |
0897831b BM |
378 | acpi_status status; |
379 | struct acpi_gpe_block_info *gpe_block; | |
380 | struct acpi_gpe_register_info *gpe_register_info; | |
4be44fcd LB |
381 | u32 int_status = ACPI_INTERRUPT_NOT_HANDLED; |
382 | u8 enabled_status_byte; | |
4be44fcd LB |
383 | u32 status_reg; |
384 | u32 enable_reg; | |
b8e4d893 | 385 | acpi_cpu_flags flags; |
4be44fcd LB |
386 | acpi_native_uint i; |
387 | acpi_native_uint j; | |
388 | ||
b229cf92 | 389 | ACPI_FUNCTION_NAME(ev_gpe_detect); |
1da177e4 LT |
390 | |
391 | /* Check for the case where there are no GPEs */ | |
392 | ||
393 | if (!gpe_xrupt_list) { | |
394 | return (int_status); | |
395 | } | |
396 | ||
967440e3 BM |
397 | /* |
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 | */ | |
4be44fcd | 402 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
4c90ece2 BM |
403 | |
404 | /* Examine all GPE blocks attached to this interrupt level */ | |
405 | ||
1da177e4 LT |
406 | 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++) { | |
52fc0b02 | 414 | |
1da177e4 LT |
415 | /* Get the next status/enable pair */ |
416 | ||
417 | gpe_register_info = &gpe_block->register_info[i]; | |
418 | ||
419 | /* Read the Status Register */ | |
420 | ||
4be44fcd LB |
421 | 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)) { | |
1da177e4 LT |
427 | goto unlock_and_exit; |
428 | } | |
429 | ||
430 | /* Read the Enable Register */ | |
431 | ||
4be44fcd LB |
432 | 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)) { | |
1da177e4 LT |
438 | goto unlock_and_exit; |
439 | } | |
440 | ||
4be44fcd LB |
441 | 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)); | |
1da177e4 | 445 | |
44f6c012 | 446 | /* Check if there is anything active at all in this register */ |
1da177e4 LT |
447 | |
448 | enabled_status_byte = (u8) (status_reg & enable_reg); | |
449 | if (!enabled_status_byte) { | |
52fc0b02 | 450 | |
1da177e4 LT |
451 | /* 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++) { | |
52fc0b02 | 459 | |
1da177e4 LT |
460 | /* Examine one GPE bit */ |
461 | ||
69874165 | 462 | if (enabled_status_byte & (1 << j)) { |
1da177e4 LT |
463 | /* |
464 | * Found an active GPE. Dispatch the event to a handler | |
465 | * or method. | |
466 | */ | |
4be44fcd LB |
467 | 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); | |
1da177e4 LT |
476 | } |
477 | } | |
478 | } | |
479 | ||
480 | gpe_block = gpe_block->next; | |
481 | } | |
482 | ||
4be44fcd | 483 | unlock_and_exit: |
1da177e4 | 484 | |
4be44fcd | 485 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
1da177e4 LT |
486 | return (int_status); |
487 | } | |
488 | ||
1da177e4 LT |
489 | /******************************************************************************* |
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 | * | |
4119532c BM |
497 | * 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 | |
1da177e4 LT |
500 | * the control method itself is not executed in the context of |
501 | * an interrupt handler. | |
502 | * | |
503 | ******************************************************************************/ | |
504 | ||
4be44fcd | 505 | static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context) |
1da177e4 | 506 | { |
4be44fcd | 507 | struct acpi_gpe_event_info *gpe_event_info = (void *)context; |
4be44fcd LB |
508 | acpi_status status; |
509 | struct acpi_gpe_event_info local_gpe_event_info; | |
4119532c | 510 | struct acpi_evaluate_info *info; |
1da177e4 | 511 | |
b229cf92 | 512 | ACPI_FUNCTION_TRACE(ev_asynch_execute_gpe_method); |
1da177e4 | 513 | |
4be44fcd LB |
514 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
515 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
516 | return_VOID; |
517 | } | |
518 | ||
519 | /* Must revalidate the gpe_number/gpe_block */ | |
520 | ||
4be44fcd LB |
521 | if (!acpi_ev_valid_gpe_event(gpe_event_info)) { |
522 | status = acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
1da177e4 LT |
523 | return_VOID; |
524 | } | |
525 | ||
526 | /* Set the GPE flags for return to enabled state */ | |
527 | ||
4be44fcd | 528 | (void)acpi_ev_enable_gpe(gpe_event_info, FALSE); |
1da177e4 LT |
529 | |
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 | */ | |
4be44fcd LB |
534 | ACPI_MEMCPY(&local_gpe_event_info, gpe_event_info, |
535 | sizeof(struct acpi_gpe_event_info)); | |
1da177e4 | 536 | |
4be44fcd LB |
537 | status = acpi_ut_release_mutex(ACPI_MTX_EVENTS); |
538 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
539 | 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 | */ | |
44f6c012 | 546 | if ((local_gpe_event_info.flags & ACPI_GPE_DISPATCH_MASK) == |
4be44fcd | 547 | ACPI_GPE_DISPATCH_METHOD) { |
1da177e4 | 548 | |
4119532c BM |
549 | /* 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 | ||
4be44fcd | 571 | if (ACPI_FAILURE(status)) { |
b8e4d893 | 572 | ACPI_EXCEPTION((AE_INFO, status, |
2e42005b | 573 | "while evaluating GPE method [%4.4s]", |
b8e4d893 BM |
574 | acpi_ut_get_node_name |
575 | (local_gpe_event_info.dispatch. | |
4c90ece2 | 576 | method_node))); |
1da177e4 LT |
577 | } |
578 | } | |
579 | ||
44f6c012 | 580 | if ((local_gpe_event_info.flags & ACPI_GPE_XRUPT_TYPE_MASK) == |
4be44fcd | 581 | ACPI_GPE_LEVEL_TRIGGERED) { |
1da177e4 LT |
582 | /* |
583 | * GPE is level-triggered, we clear the GPE status bit after | |
584 | * handling the event. | |
585 | */ | |
4be44fcd LB |
586 | status = acpi_hw_clear_gpe(&local_gpe_event_info); |
587 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
588 | return_VOID; |
589 | } | |
590 | } | |
591 | ||
592 | /* Enable this GPE */ | |
593 | ||
4be44fcd | 594 | (void)acpi_hw_write_gpe_enable_reg(&local_gpe_event_info); |
1da177e4 LT |
595 | return_VOID; |
596 | } | |
597 | ||
1da177e4 LT |
598 | /******************************************************************************* |
599 | * | |
600 | * FUNCTION: acpi_ev_gpe_dispatch | |
601 | * | |
44f6c012 | 602 | * PARAMETERS: gpe_event_info - Info for this GPE |
1da177e4 LT |
603 | * 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 | ||
614 | u32 | |
4be44fcd | 615 | acpi_ev_gpe_dispatch(struct acpi_gpe_event_info *gpe_event_info, u32 gpe_number) |
1da177e4 | 616 | { |
4be44fcd | 617 | acpi_status status; |
1da177e4 | 618 | |
b229cf92 | 619 | ACPI_FUNCTION_TRACE(ev_gpe_dispatch); |
1da177e4 | 620 | |
fdffb72d BM |
621 | acpi_gpe_count++; |
622 | ||
1da177e4 LT |
623 | /* |
624 | * If edge-triggered, clear the GPE status bit now. Note that | |
625 | * level-triggered events are cleared after the GPE is serviced. | |
626 | */ | |
44f6c012 | 627 | if ((gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK) == |
4be44fcd LB |
628 | ACPI_GPE_EDGE_TRIGGERED) { |
629 | status = acpi_hw_clear_gpe(gpe_event_info); | |
630 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
631 | ACPI_EXCEPTION((AE_INFO, status, |
632 | "Unable to clear GPE[%2X]", | |
633 | gpe_number)); | |
50eca3eb | 634 | return_UINT32(ACPI_INTERRUPT_NOT_HANDLED); |
1da177e4 LT |
635 | } |
636 | } | |
637 | ||
1da177e4 | 638 | /* |
c5a71569 BM |
639 | * 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. | |
1da177e4 LT |
644 | */ |
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 | */ | |
4be44fcd LB |
652 | (void)gpe_event_info->dispatch.handler->address(gpe_event_info-> |
653 | dispatch. | |
654 | handler-> | |
655 | context); | |
1da177e4 LT |
656 | |
657 | /* It is now safe to clear level-triggered events. */ | |
658 | ||
44f6c012 | 659 | if ((gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK) == |
4be44fcd LB |
660 | ACPI_GPE_LEVEL_TRIGGERED) { |
661 | status = acpi_hw_clear_gpe(gpe_event_info); | |
662 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
663 | ACPI_EXCEPTION((AE_INFO, status, |
664 | "Unable to clear GPE[%2X]", | |
665 | gpe_number)); | |
50eca3eb | 666 | return_UINT32(ACPI_INTERRUPT_NOT_HANDLED); |
1da177e4 LT |
667 | } |
668 | } | |
669 | break; | |
670 | ||
671 | case ACPI_GPE_DISPATCH_METHOD: | |
672 | ||
673 | /* | |
c5a71569 BM |
674 | * Disable the GPE, so it doesn't keep firing before the method has a |
675 | * chance to run (it runs asynchronously with interrupts enabled). | |
1da177e4 | 676 | */ |
4be44fcd LB |
677 | status = acpi_ev_disable_gpe(gpe_event_info); |
678 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
679 | ACPI_EXCEPTION((AE_INFO, status, |
680 | "Unable to disable GPE[%2X]", | |
681 | gpe_number)); | |
50eca3eb | 682 | return_UINT32(ACPI_INTERRUPT_NOT_HANDLED); |
1da177e4 LT |
683 | } |
684 | ||
685 | /* | |
686 | * Execute the method associated with the GPE | |
687 | * NOTE: Level-triggered GPEs are cleared after the method completes. | |
688 | */ | |
958dd242 BM |
689 | status = acpi_os_execute(OSL_GPE_HANDLER, |
690 | acpi_ev_asynch_execute_gpe_method, | |
691 | gpe_event_info); | |
4be44fcd | 692 | if (ACPI_FAILURE(status)) { |
b8e4d893 BM |
693 | ACPI_EXCEPTION((AE_INFO, status, |
694 | "Unable to queue handler for GPE[%2X] - event disabled", | |
695 | gpe_number)); | |
1da177e4 LT |
696 | } |
697 | break; | |
698 | ||
699 | default: | |
700 | ||
701 | /* No handler or method to run! */ | |
702 | ||
b8e4d893 BM |
703 | ACPI_ERROR((AE_INFO, |
704 | "No handler or method for GPE[%2X], disabling event", | |
705 | gpe_number)); | |
1da177e4 LT |
706 | |
707 | /* | |
c5a71569 | 708 | * Disable the GPE. The GPE will remain disabled until the ACPI |
1da177e4 LT |
709 | * Core Subsystem is restarted, or a handler is installed. |
710 | */ | |
4be44fcd LB |
711 | status = acpi_ev_disable_gpe(gpe_event_info); |
712 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
713 | ACPI_EXCEPTION((AE_INFO, status, |
714 | "Unable to disable GPE[%2X]", | |
715 | gpe_number)); | |
50eca3eb | 716 | return_UINT32(ACPI_INTERRUPT_NOT_HANDLED); |
1da177e4 LT |
717 | } |
718 | break; | |
719 | } | |
720 | ||
50eca3eb | 721 | return_UINT32(ACPI_INTERRUPT_HANDLED); |
1da177e4 | 722 | } |