Commit | Line | Data |
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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: evgpeblk - GPE block creation and initialization. | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
a8357b0c | 8 | * Copyright (C) 2000 - 2010, Intel Corp. |
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> | |
e2f7a777 LB |
45 | #include "accommon.h" |
46 | #include "acevents.h" | |
47 | #include "acnamesp.h" | |
1da177e4 LT |
48 | |
49 | #define _COMPONENT ACPI_EVENTS | |
4be44fcd | 50 | ACPI_MODULE_NAME("evgpeblk") |
1da177e4 | 51 | |
44f6c012 | 52 | /* Local prototypes */ |
44f6c012 | 53 | static acpi_status |
4be44fcd LB |
54 | acpi_ev_save_method_info(acpi_handle obj_handle, |
55 | u32 level, void *obj_desc, void **return_value); | |
44f6c012 RM |
56 | |
57 | static acpi_status | |
4be44fcd LB |
58 | acpi_ev_match_prw_and_gpe(acpi_handle obj_handle, |
59 | u32 level, void *info, void **return_value); | |
44f6c012 | 60 | |
4be44fcd LB |
61 | static struct acpi_gpe_xrupt_info *acpi_ev_get_gpe_xrupt_block(u32 |
62 | interrupt_number); | |
44f6c012 RM |
63 | |
64 | static acpi_status | |
4be44fcd | 65 | acpi_ev_delete_gpe_xrupt(struct acpi_gpe_xrupt_info *gpe_xrupt); |
44f6c012 RM |
66 | |
67 | static acpi_status | |
4be44fcd LB |
68 | acpi_ev_install_gpe_block(struct acpi_gpe_block_info *gpe_block, |
69 | u32 interrupt_number); | |
44f6c012 RM |
70 | |
71 | static acpi_status | |
4be44fcd | 72 | acpi_ev_create_gpe_info_blocks(struct acpi_gpe_block_info *gpe_block); |
1da177e4 LT |
73 | |
74 | /******************************************************************************* | |
75 | * | |
76 | * FUNCTION: acpi_ev_valid_gpe_event | |
77 | * | |
78 | * PARAMETERS: gpe_event_info - Info for this GPE | |
79 | * | |
80 | * RETURN: TRUE if the gpe_event is valid | |
81 | * | |
96db255c | 82 | * DESCRIPTION: Validate a GPE event. DO NOT CALL FROM INTERRUPT LEVEL. |
1da177e4 LT |
83 | * Should be called only when the GPE lists are semaphore locked |
84 | * and not subject to change. | |
85 | * | |
86 | ******************************************************************************/ | |
87 | ||
4be44fcd | 88 | u8 acpi_ev_valid_gpe_event(struct acpi_gpe_event_info *gpe_event_info) |
1da177e4 | 89 | { |
4be44fcd LB |
90 | struct acpi_gpe_xrupt_info *gpe_xrupt_block; |
91 | struct acpi_gpe_block_info *gpe_block; | |
1da177e4 | 92 | |
4be44fcd | 93 | ACPI_FUNCTION_ENTRY(); |
1da177e4 LT |
94 | |
95 | /* No need for spin lock since we are not changing any list elements */ | |
96 | ||
97 | /* Walk the GPE interrupt levels */ | |
98 | ||
99 | gpe_xrupt_block = acpi_gbl_gpe_xrupt_list_head; | |
100 | while (gpe_xrupt_block) { | |
101 | gpe_block = gpe_xrupt_block->gpe_block_list_head; | |
102 | ||
103 | /* Walk the GPE blocks on this interrupt level */ | |
104 | ||
105 | while (gpe_block) { | |
106 | if ((&gpe_block->event_info[0] <= gpe_event_info) && | |
d4913dc6 BM |
107 | (&gpe_block->event_info[((acpi_size) |
108 | gpe_block-> | |
109 | register_count) * 8] > | |
4be44fcd | 110 | gpe_event_info)) { |
1da177e4 LT |
111 | return (TRUE); |
112 | } | |
113 | ||
114 | gpe_block = gpe_block->next; | |
115 | } | |
116 | ||
117 | gpe_xrupt_block = gpe_xrupt_block->next; | |
118 | } | |
119 | ||
120 | return (FALSE); | |
121 | } | |
122 | ||
1da177e4 LT |
123 | /******************************************************************************* |
124 | * | |
125 | * FUNCTION: acpi_ev_walk_gpe_list | |
126 | * | |
127 | * PARAMETERS: gpe_walk_callback - Routine called for each GPE block | |
e97d6bf1 | 128 | * Context - Value passed to callback |
1da177e4 LT |
129 | * |
130 | * RETURN: Status | |
131 | * | |
132 | * DESCRIPTION: Walk the GPE lists. | |
133 | * | |
134 | ******************************************************************************/ | |
135 | ||
e97d6bf1 BM |
136 | acpi_status |
137 | acpi_ev_walk_gpe_list(acpi_gpe_callback gpe_walk_callback, void *context) | |
1da177e4 | 138 | { |
4be44fcd LB |
139 | struct acpi_gpe_block_info *gpe_block; |
140 | struct acpi_gpe_xrupt_info *gpe_xrupt_info; | |
141 | acpi_status status = AE_OK; | |
b8e4d893 | 142 | acpi_cpu_flags flags; |
1da177e4 | 143 | |
b229cf92 | 144 | ACPI_FUNCTION_TRACE(ev_walk_gpe_list); |
1da177e4 | 145 | |
4be44fcd | 146 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
1da177e4 LT |
147 | |
148 | /* Walk the interrupt level descriptor list */ | |
149 | ||
150 | gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head; | |
151 | while (gpe_xrupt_info) { | |
52fc0b02 | 152 | |
1da177e4 LT |
153 | /* Walk all Gpe Blocks attached to this interrupt level */ |
154 | ||
155 | gpe_block = gpe_xrupt_info->gpe_block_list_head; | |
156 | while (gpe_block) { | |
52fc0b02 | 157 | |
1da177e4 LT |
158 | /* One callback per GPE block */ |
159 | ||
e97d6bf1 BM |
160 | status = |
161 | gpe_walk_callback(gpe_xrupt_info, gpe_block, | |
162 | context); | |
4be44fcd | 163 | if (ACPI_FAILURE(status)) { |
e97d6bf1 BM |
164 | if (status == AE_CTRL_END) { /* Callback abort */ |
165 | status = AE_OK; | |
166 | } | |
1da177e4 LT |
167 | goto unlock_and_exit; |
168 | } | |
169 | ||
170 | gpe_block = gpe_block->next; | |
171 | } | |
172 | ||
173 | gpe_xrupt_info = gpe_xrupt_info->next; | |
174 | } | |
175 | ||
4be44fcd LB |
176 | unlock_and_exit: |
177 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
178 | return_ACPI_STATUS(status); | |
1da177e4 LT |
179 | } |
180 | ||
44f6c012 | 181 | /******************************************************************************* |
1da177e4 LT |
182 | * |
183 | * FUNCTION: acpi_ev_delete_gpe_handlers | |
184 | * | |
185 | * PARAMETERS: gpe_xrupt_info - GPE Interrupt info | |
186 | * gpe_block - Gpe Block info | |
187 | * | |
188 | * RETURN: Status | |
189 | * | |
190 | * DESCRIPTION: Delete all Handler objects found in the GPE data structs. | |
191 | * Used only prior to termination. | |
192 | * | |
193 | ******************************************************************************/ | |
194 | ||
195 | acpi_status | |
4be44fcd | 196 | acpi_ev_delete_gpe_handlers(struct acpi_gpe_xrupt_info *gpe_xrupt_info, |
e97d6bf1 BM |
197 | struct acpi_gpe_block_info *gpe_block, |
198 | void *context) | |
1da177e4 | 199 | { |
4be44fcd | 200 | struct acpi_gpe_event_info *gpe_event_info; |
67a119f9 BM |
201 | u32 i; |
202 | u32 j; | |
1da177e4 | 203 | |
b229cf92 | 204 | ACPI_FUNCTION_TRACE(ev_delete_gpe_handlers); |
1da177e4 LT |
205 | |
206 | /* Examine each GPE Register within the block */ | |
207 | ||
208 | for (i = 0; i < gpe_block->register_count; i++) { | |
52fc0b02 | 209 | |
1da177e4 LT |
210 | /* Now look at the individual GPEs in this byte register */ |
211 | ||
212 | for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) { | |
d4913dc6 BM |
213 | gpe_event_info = &gpe_block->event_info[((acpi_size) i * |
214 | ACPI_GPE_REGISTER_WIDTH) | |
215 | + j]; | |
1da177e4 | 216 | |
44f6c012 | 217 | if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) == |
4be44fcd | 218 | ACPI_GPE_DISPATCH_HANDLER) { |
8313524a | 219 | ACPI_FREE(gpe_event_info->dispatch.handler); |
1da177e4 | 220 | gpe_event_info->dispatch.handler = NULL; |
4be44fcd LB |
221 | gpe_event_info->flags &= |
222 | ~ACPI_GPE_DISPATCH_MASK; | |
1da177e4 LT |
223 | } |
224 | } | |
225 | } | |
226 | ||
4be44fcd | 227 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
228 | } |
229 | ||
1da177e4 LT |
230 | /******************************************************************************* |
231 | * | |
232 | * FUNCTION: acpi_ev_save_method_info | |
233 | * | |
234 | * PARAMETERS: Callback from walk_namespace | |
235 | * | |
236 | * RETURN: Status | |
237 | * | |
238 | * DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a | |
239 | * control method under the _GPE portion of the namespace. | |
240 | * Extract the name and GPE type from the object, saving this | |
241 | * information for quick lookup during GPE dispatch | |
242 | * | |
243 | * The name of each GPE control method is of the form: | |
244 | * "_Lxx" or "_Exx" | |
245 | * Where: | |
246 | * L - means that the GPE is level triggered | |
247 | * E - means that the GPE is edge triggered | |
248 | * xx - is the GPE number [in HEX] | |
249 | * | |
250 | ******************************************************************************/ | |
251 | ||
252 | static acpi_status | |
4be44fcd LB |
253 | acpi_ev_save_method_info(acpi_handle obj_handle, |
254 | u32 level, void *obj_desc, void **return_value) | |
1da177e4 | 255 | { |
4be44fcd LB |
256 | struct acpi_gpe_block_info *gpe_block = (void *)obj_desc; |
257 | struct acpi_gpe_event_info *gpe_event_info; | |
258 | u32 gpe_number; | |
259 | char name[ACPI_NAME_SIZE + 1]; | |
260 | u8 type; | |
1da177e4 | 261 | |
b229cf92 | 262 | ACPI_FUNCTION_TRACE(ev_save_method_info); |
1da177e4 LT |
263 | |
264 | /* | |
265 | * _Lxx and _Exx GPE method support | |
266 | * | |
267 | * 1) Extract the name from the object and convert to a string | |
268 | */ | |
4be44fcd LB |
269 | ACPI_MOVE_32_TO_32(name, |
270 | &((struct acpi_namespace_node *)obj_handle)->name. | |
271 | integer); | |
1da177e4 LT |
272 | name[ACPI_NAME_SIZE] = 0; |
273 | ||
274 | /* | |
275 | * 2) Edge/Level determination is based on the 2nd character | |
276 | * of the method name | |
277 | * | |
96db255c | 278 | * NOTE: Default GPE type is RUNTIME. May be changed later to WAKE |
1da177e4 LT |
279 | * if a _PRW object is found that points to this GPE. |
280 | */ | |
281 | switch (name[1]) { | |
282 | case 'L': | |
283 | type = ACPI_GPE_LEVEL_TRIGGERED; | |
284 | break; | |
285 | ||
286 | case 'E': | |
287 | type = ACPI_GPE_EDGE_TRIGGERED; | |
288 | break; | |
289 | ||
290 | default: | |
291 | /* Unknown method type, just ignore it! */ | |
292 | ||
b229cf92 | 293 | ACPI_DEBUG_PRINT((ACPI_DB_LOAD, |
d4913dc6 BM |
294 | "Ignoring unknown GPE method type: %s " |
295 | "(name not of form _Lxx or _Exx)", name)); | |
4be44fcd | 296 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
297 | } |
298 | ||
299 | /* Convert the last two characters of the name to the GPE Number */ | |
300 | ||
4be44fcd | 301 | gpe_number = ACPI_STRTOUL(&name[2], NULL, 16); |
1da177e4 | 302 | if (gpe_number == ACPI_UINT32_MAX) { |
52fc0b02 | 303 | |
1da177e4 LT |
304 | /* Conversion failed; invalid method, just ignore it */ |
305 | ||
b229cf92 | 306 | ACPI_DEBUG_PRINT((ACPI_DB_LOAD, |
d4913dc6 BM |
307 | "Could not extract GPE number from name: %s " |
308 | "(name is not of form _Lxx or _Exx)", name)); | |
4be44fcd | 309 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
310 | } |
311 | ||
312 | /* Ensure that we have a valid GPE number for this GPE block */ | |
313 | ||
314 | if ((gpe_number < gpe_block->block_base_number) || | |
d4913dc6 BM |
315 | (gpe_number >= (gpe_block->block_base_number + |
316 | (gpe_block->register_count * 8)))) { | |
1da177e4 | 317 | /* |
9f15fc66 BM |
318 | * Not valid for this GPE block, just ignore it. However, it may be |
319 | * valid for a different GPE block, since GPE0 and GPE1 methods both | |
320 | * appear under \_GPE. | |
1da177e4 | 321 | */ |
4be44fcd | 322 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
323 | } |
324 | ||
325 | /* | |
9f15fc66 | 326 | * Now we can add this information to the gpe_event_info block for use |
9630bdd9 | 327 | * during dispatch of this GPE. |
1da177e4 | 328 | */ |
4be44fcd LB |
329 | gpe_event_info = |
330 | &gpe_block->event_info[gpe_number - gpe_block->block_base_number]; | |
1da177e4 | 331 | |
9630bdd9 | 332 | gpe_event_info->flags = (u8) (type | ACPI_GPE_DISPATCH_METHOD); |
1da177e4 | 333 | |
4be44fcd LB |
334 | gpe_event_info->dispatch.method_node = |
335 | (struct acpi_namespace_node *)obj_handle; | |
1da177e4 | 336 | |
4be44fcd LB |
337 | ACPI_DEBUG_PRINT((ACPI_DB_LOAD, |
338 | "Registered GPE method %s as GPE number 0x%.2X\n", | |
339 | name, gpe_number)); | |
9630bdd9 | 340 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
341 | } |
342 | ||
1da177e4 LT |
343 | /******************************************************************************* |
344 | * | |
345 | * FUNCTION: acpi_ev_match_prw_and_gpe | |
346 | * | |
347 | * PARAMETERS: Callback from walk_namespace | |
348 | * | |
96db255c | 349 | * RETURN: Status. NOTE: We ignore errors so that the _PRW walk is |
1da177e4 LT |
350 | * not aborted on a single _PRW failure. |
351 | * | |
352 | * DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a | |
96db255c | 353 | * Device. Run the _PRW method. If present, extract the GPE |
1da177e4 LT |
354 | * number and mark the GPE as a WAKE GPE. |
355 | * | |
356 | ******************************************************************************/ | |
357 | ||
358 | static acpi_status | |
4be44fcd LB |
359 | acpi_ev_match_prw_and_gpe(acpi_handle obj_handle, |
360 | u32 level, void *info, void **return_value) | |
1da177e4 | 361 | { |
4be44fcd LB |
362 | struct acpi_gpe_walk_info *gpe_info = (void *)info; |
363 | struct acpi_namespace_node *gpe_device; | |
364 | struct acpi_gpe_block_info *gpe_block; | |
365 | struct acpi_namespace_node *target_gpe_device; | |
366 | struct acpi_gpe_event_info *gpe_event_info; | |
367 | union acpi_operand_object *pkg_desc; | |
368 | union acpi_operand_object *obj_desc; | |
369 | u32 gpe_number; | |
370 | acpi_status status; | |
371 | ||
b229cf92 | 372 | ACPI_FUNCTION_TRACE(ev_match_prw_and_gpe); |
1da177e4 LT |
373 | |
374 | /* Check for a _PRW method under this device */ | |
375 | ||
4be44fcd LB |
376 | status = acpi_ut_evaluate_object(obj_handle, METHOD_NAME__PRW, |
377 | ACPI_BTYPE_PACKAGE, &pkg_desc); | |
378 | if (ACPI_FAILURE(status)) { | |
52fc0b02 | 379 | |
1da177e4 LT |
380 | /* Ignore all errors from _PRW, we don't want to abort the subsystem */ |
381 | ||
4be44fcd | 382 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
383 | } |
384 | ||
385 | /* The returned _PRW package must have at least two elements */ | |
386 | ||
387 | if (pkg_desc->package.count < 2) { | |
388 | goto cleanup; | |
389 | } | |
390 | ||
391 | /* Extract pointers from the input context */ | |
392 | ||
393 | gpe_device = gpe_info->gpe_device; | |
394 | gpe_block = gpe_info->gpe_block; | |
395 | ||
396 | /* | |
9f15fc66 BM |
397 | * The _PRW object must return a package, we are only interested in the |
398 | * first element | |
1da177e4 LT |
399 | */ |
400 | obj_desc = pkg_desc->package.elements[0]; | |
401 | ||
3371c19c | 402 | if (obj_desc->common.type == ACPI_TYPE_INTEGER) { |
52fc0b02 | 403 | |
1da177e4 LT |
404 | /* Use FADT-defined GPE device (from definition of _PRW) */ |
405 | ||
406 | target_gpe_device = acpi_gbl_fadt_gpe_device; | |
407 | ||
408 | /* Integer is the GPE number in the FADT described GPE blocks */ | |
409 | ||
410 | gpe_number = (u32) obj_desc->integer.value; | |
3371c19c | 411 | } else if (obj_desc->common.type == ACPI_TYPE_PACKAGE) { |
52fc0b02 | 412 | |
1da177e4 LT |
413 | /* Package contains a GPE reference and GPE number within a GPE block */ |
414 | ||
415 | if ((obj_desc->package.count < 2) || | |
3371c19c | 416 | ((obj_desc->package.elements[0])->common.type != |
d4913dc6 BM |
417 | ACPI_TYPE_LOCAL_REFERENCE) || |
418 | ((obj_desc->package.elements[1])->common.type != | |
419 | ACPI_TYPE_INTEGER)) { | |
1da177e4 LT |
420 | goto cleanup; |
421 | } | |
422 | ||
423 | /* Get GPE block reference and decode */ | |
424 | ||
4be44fcd LB |
425 | target_gpe_device = |
426 | obj_desc->package.elements[0]->reference.node; | |
1da177e4 | 427 | gpe_number = (u32) obj_desc->package.elements[1]->integer.value; |
4be44fcd | 428 | } else { |
1da177e4 LT |
429 | /* Unknown type, just ignore it */ |
430 | ||
431 | goto cleanup; | |
432 | } | |
433 | ||
434 | /* | |
435 | * Is this GPE within this block? | |
436 | * | |
9f15fc66 | 437 | * TRUE if and only if these conditions are true: |
1da177e4 LT |
438 | * 1) The GPE devices match. |
439 | * 2) The GPE index(number) is within the range of the Gpe Block | |
440 | * associated with the GPE device. | |
441 | */ | |
442 | if ((gpe_device == target_gpe_device) && | |
4be44fcd | 443 | (gpe_number >= gpe_block->block_base_number) && |
d4913dc6 BM |
444 | (gpe_number < gpe_block->block_base_number + |
445 | (gpe_block->register_count * 8))) { | |
446 | gpe_event_info = &gpe_block->event_info[gpe_number - | |
447 | gpe_block-> | |
448 | block_base_number]; | |
1da177e4 | 449 | |
9630bdd9 | 450 | gpe_event_info->flags |= ACPI_GPE_CAN_WAKE; |
1da177e4 LT |
451 | } |
452 | ||
4be44fcd LB |
453 | cleanup: |
454 | acpi_ut_remove_reference(pkg_desc); | |
455 | return_ACPI_STATUS(AE_OK); | |
1da177e4 LT |
456 | } |
457 | ||
1da177e4 LT |
458 | /******************************************************************************* |
459 | * | |
460 | * FUNCTION: acpi_ev_get_gpe_xrupt_block | |
461 | * | |
6f42ccf2 | 462 | * PARAMETERS: interrupt_number - Interrupt for a GPE block |
1da177e4 LT |
463 | * |
464 | * RETURN: A GPE interrupt block | |
465 | * | |
96db255c | 466 | * DESCRIPTION: Get or Create a GPE interrupt block. There is one interrupt |
9f15fc66 BM |
467 | * block per unique interrupt level used for GPEs. Should be |
468 | * called only when the GPE lists are semaphore locked and not | |
469 | * subject to change. | |
1da177e4 LT |
470 | * |
471 | ******************************************************************************/ | |
472 | ||
4be44fcd LB |
473 | static struct acpi_gpe_xrupt_info *acpi_ev_get_gpe_xrupt_block(u32 |
474 | interrupt_number) | |
1da177e4 | 475 | { |
4be44fcd LB |
476 | struct acpi_gpe_xrupt_info *next_gpe_xrupt; |
477 | struct acpi_gpe_xrupt_info *gpe_xrupt; | |
478 | acpi_status status; | |
b8e4d893 | 479 | acpi_cpu_flags flags; |
1da177e4 | 480 | |
b229cf92 | 481 | ACPI_FUNCTION_TRACE(ev_get_gpe_xrupt_block); |
1da177e4 | 482 | |
44f6c012 | 483 | /* No need for lock since we are not changing any list elements here */ |
1da177e4 LT |
484 | |
485 | next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head; | |
486 | while (next_gpe_xrupt) { | |
6f42ccf2 | 487 | if (next_gpe_xrupt->interrupt_number == interrupt_number) { |
4be44fcd | 488 | return_PTR(next_gpe_xrupt); |
1da177e4 LT |
489 | } |
490 | ||
491 | next_gpe_xrupt = next_gpe_xrupt->next; | |
492 | } | |
493 | ||
494 | /* Not found, must allocate a new xrupt descriptor */ | |
495 | ||
8313524a | 496 | gpe_xrupt = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_xrupt_info)); |
1da177e4 | 497 | if (!gpe_xrupt) { |
4be44fcd | 498 | return_PTR(NULL); |
1da177e4 LT |
499 | } |
500 | ||
6f42ccf2 | 501 | gpe_xrupt->interrupt_number = interrupt_number; |
1da177e4 LT |
502 | |
503 | /* Install new interrupt descriptor with spin lock */ | |
504 | ||
4be44fcd | 505 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
1da177e4 LT |
506 | if (acpi_gbl_gpe_xrupt_list_head) { |
507 | next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head; | |
508 | while (next_gpe_xrupt->next) { | |
509 | next_gpe_xrupt = next_gpe_xrupt->next; | |
510 | } | |
511 | ||
512 | next_gpe_xrupt->next = gpe_xrupt; | |
513 | gpe_xrupt->previous = next_gpe_xrupt; | |
4be44fcd | 514 | } else { |
1da177e4 LT |
515 | acpi_gbl_gpe_xrupt_list_head = gpe_xrupt; |
516 | } | |
4be44fcd | 517 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
1da177e4 LT |
518 | |
519 | /* Install new interrupt handler if not SCI_INT */ | |
520 | ||
f3d2e786 | 521 | if (interrupt_number != acpi_gbl_FADT.sci_interrupt) { |
4be44fcd LB |
522 | status = acpi_os_install_interrupt_handler(interrupt_number, |
523 | acpi_ev_gpe_xrupt_handler, | |
524 | gpe_xrupt); | |
525 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
526 | ACPI_ERROR((AE_INFO, |
527 | "Could not install GPE interrupt handler at level 0x%X", | |
528 | interrupt_number)); | |
4be44fcd | 529 | return_PTR(NULL); |
1da177e4 LT |
530 | } |
531 | } | |
532 | ||
4be44fcd | 533 | return_PTR(gpe_xrupt); |
1da177e4 LT |
534 | } |
535 | ||
1da177e4 LT |
536 | /******************************************************************************* |
537 | * | |
538 | * FUNCTION: acpi_ev_delete_gpe_xrupt | |
539 | * | |
540 | * PARAMETERS: gpe_xrupt - A GPE interrupt info block | |
541 | * | |
542 | * RETURN: Status | |
543 | * | |
544 | * DESCRIPTION: Remove and free a gpe_xrupt block. Remove an associated | |
545 | * interrupt handler if not the SCI interrupt. | |
546 | * | |
547 | ******************************************************************************/ | |
548 | ||
549 | static acpi_status | |
4be44fcd | 550 | acpi_ev_delete_gpe_xrupt(struct acpi_gpe_xrupt_info *gpe_xrupt) |
1da177e4 | 551 | { |
4be44fcd | 552 | acpi_status status; |
b8e4d893 | 553 | acpi_cpu_flags flags; |
1da177e4 | 554 | |
b229cf92 | 555 | ACPI_FUNCTION_TRACE(ev_delete_gpe_xrupt); |
1da177e4 LT |
556 | |
557 | /* We never want to remove the SCI interrupt handler */ | |
558 | ||
f3d2e786 | 559 | if (gpe_xrupt->interrupt_number == acpi_gbl_FADT.sci_interrupt) { |
1da177e4 | 560 | gpe_xrupt->gpe_block_list_head = NULL; |
4be44fcd | 561 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
562 | } |
563 | ||
564 | /* Disable this interrupt */ | |
565 | ||
96db255c BM |
566 | status = |
567 | acpi_os_remove_interrupt_handler(gpe_xrupt->interrupt_number, | |
568 | acpi_ev_gpe_xrupt_handler); | |
4be44fcd LB |
569 | if (ACPI_FAILURE(status)) { |
570 | return_ACPI_STATUS(status); | |
1da177e4 LT |
571 | } |
572 | ||
573 | /* Unlink the interrupt block with lock */ | |
574 | ||
4be44fcd | 575 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
1da177e4 LT |
576 | if (gpe_xrupt->previous) { |
577 | gpe_xrupt->previous->next = gpe_xrupt->next; | |
e0b91050 BM |
578 | } else { |
579 | /* No previous, update list head */ | |
580 | ||
581 | acpi_gbl_gpe_xrupt_list_head = gpe_xrupt->next; | |
1da177e4 LT |
582 | } |
583 | ||
584 | if (gpe_xrupt->next) { | |
585 | gpe_xrupt->next->previous = gpe_xrupt->previous; | |
586 | } | |
4be44fcd | 587 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
1da177e4 LT |
588 | |
589 | /* Free the block */ | |
590 | ||
8313524a | 591 | ACPI_FREE(gpe_xrupt); |
4be44fcd | 592 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
593 | } |
594 | ||
1da177e4 LT |
595 | /******************************************************************************* |
596 | * | |
597 | * FUNCTION: acpi_ev_install_gpe_block | |
598 | * | |
9f15fc66 BM |
599 | * PARAMETERS: gpe_block - New GPE block |
600 | * interrupt_number - Xrupt to be associated with this | |
601 | * GPE block | |
1da177e4 LT |
602 | * |
603 | * RETURN: Status | |
604 | * | |
605 | * DESCRIPTION: Install new GPE block with mutex support | |
606 | * | |
607 | ******************************************************************************/ | |
608 | ||
609 | static acpi_status | |
4be44fcd LB |
610 | acpi_ev_install_gpe_block(struct acpi_gpe_block_info *gpe_block, |
611 | u32 interrupt_number) | |
1da177e4 | 612 | { |
4be44fcd LB |
613 | struct acpi_gpe_block_info *next_gpe_block; |
614 | struct acpi_gpe_xrupt_info *gpe_xrupt_block; | |
615 | acpi_status status; | |
b8e4d893 | 616 | acpi_cpu_flags flags; |
1da177e4 | 617 | |
b229cf92 | 618 | ACPI_FUNCTION_TRACE(ev_install_gpe_block); |
1da177e4 | 619 | |
4be44fcd LB |
620 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
621 | if (ACPI_FAILURE(status)) { | |
622 | return_ACPI_STATUS(status); | |
1da177e4 LT |
623 | } |
624 | ||
4be44fcd | 625 | gpe_xrupt_block = acpi_ev_get_gpe_xrupt_block(interrupt_number); |
1da177e4 LT |
626 | if (!gpe_xrupt_block) { |
627 | status = AE_NO_MEMORY; | |
628 | goto unlock_and_exit; | |
629 | } | |
630 | ||
44f6c012 | 631 | /* Install the new block at the end of the list with lock */ |
1da177e4 | 632 | |
4be44fcd | 633 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
1da177e4 LT |
634 | if (gpe_xrupt_block->gpe_block_list_head) { |
635 | next_gpe_block = gpe_xrupt_block->gpe_block_list_head; | |
636 | while (next_gpe_block->next) { | |
637 | next_gpe_block = next_gpe_block->next; | |
638 | } | |
639 | ||
640 | next_gpe_block->next = gpe_block; | |
641 | gpe_block->previous = next_gpe_block; | |
4be44fcd | 642 | } else { |
1da177e4 LT |
643 | gpe_xrupt_block->gpe_block_list_head = gpe_block; |
644 | } | |
645 | ||
646 | gpe_block->xrupt_block = gpe_xrupt_block; | |
4be44fcd | 647 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
1da177e4 | 648 | |
4be44fcd LB |
649 | unlock_and_exit: |
650 | status = acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
651 | return_ACPI_STATUS(status); | |
1da177e4 LT |
652 | } |
653 | ||
1da177e4 LT |
654 | /******************************************************************************* |
655 | * | |
656 | * FUNCTION: acpi_ev_delete_gpe_block | |
657 | * | |
9f15fc66 | 658 | * PARAMETERS: gpe_block - Existing GPE block |
1da177e4 LT |
659 | * |
660 | * RETURN: Status | |
661 | * | |
662 | * DESCRIPTION: Remove a GPE block | |
663 | * | |
664 | ******************************************************************************/ | |
665 | ||
4be44fcd | 666 | acpi_status acpi_ev_delete_gpe_block(struct acpi_gpe_block_info *gpe_block) |
1da177e4 | 667 | { |
4be44fcd | 668 | acpi_status status; |
b8e4d893 | 669 | acpi_cpu_flags flags; |
1da177e4 | 670 | |
b229cf92 | 671 | ACPI_FUNCTION_TRACE(ev_install_gpe_block); |
1da177e4 | 672 | |
4be44fcd LB |
673 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
674 | if (ACPI_FAILURE(status)) { | |
675 | return_ACPI_STATUS(status); | |
1da177e4 LT |
676 | } |
677 | ||
678 | /* Disable all GPEs in this block */ | |
679 | ||
e97d6bf1 BM |
680 | status = |
681 | acpi_hw_disable_gpe_block(gpe_block->xrupt_block, gpe_block, NULL); | |
1da177e4 LT |
682 | |
683 | if (!gpe_block->previous && !gpe_block->next) { | |
52fc0b02 | 684 | |
1da177e4 LT |
685 | /* This is the last gpe_block on this interrupt */ |
686 | ||
4be44fcd LB |
687 | status = acpi_ev_delete_gpe_xrupt(gpe_block->xrupt_block); |
688 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
689 | goto unlock_and_exit; |
690 | } | |
4be44fcd | 691 | } else { |
1da177e4 LT |
692 | /* Remove the block on this interrupt with lock */ |
693 | ||
4be44fcd | 694 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
1da177e4 LT |
695 | if (gpe_block->previous) { |
696 | gpe_block->previous->next = gpe_block->next; | |
4be44fcd LB |
697 | } else { |
698 | gpe_block->xrupt_block->gpe_block_list_head = | |
699 | gpe_block->next; | |
1da177e4 LT |
700 | } |
701 | ||
702 | if (gpe_block->next) { | |
703 | gpe_block->next->previous = gpe_block->previous; | |
704 | } | |
4be44fcd | 705 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
1da177e4 LT |
706 | } |
707 | ||
e97d6bf1 BM |
708 | acpi_current_gpe_count -= |
709 | gpe_block->register_count * ACPI_GPE_REGISTER_WIDTH; | |
710 | ||
1da177e4 LT |
711 | /* Free the gpe_block */ |
712 | ||
8313524a BM |
713 | ACPI_FREE(gpe_block->register_info); |
714 | ACPI_FREE(gpe_block->event_info); | |
715 | ACPI_FREE(gpe_block); | |
1da177e4 | 716 | |
4be44fcd LB |
717 | unlock_and_exit: |
718 | status = acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
719 | return_ACPI_STATUS(status); | |
1da177e4 LT |
720 | } |
721 | ||
1da177e4 LT |
722 | /******************************************************************************* |
723 | * | |
724 | * FUNCTION: acpi_ev_create_gpe_info_blocks | |
725 | * | |
726 | * PARAMETERS: gpe_block - New GPE block | |
727 | * | |
728 | * RETURN: Status | |
729 | * | |
730 | * DESCRIPTION: Create the register_info and event_info blocks for this GPE block | |
731 | * | |
732 | ******************************************************************************/ | |
733 | ||
734 | static acpi_status | |
4be44fcd | 735 | acpi_ev_create_gpe_info_blocks(struct acpi_gpe_block_info *gpe_block) |
1da177e4 | 736 | { |
4be44fcd LB |
737 | struct acpi_gpe_register_info *gpe_register_info = NULL; |
738 | struct acpi_gpe_event_info *gpe_event_info = NULL; | |
739 | struct acpi_gpe_event_info *this_event; | |
740 | struct acpi_gpe_register_info *this_register; | |
67a119f9 BM |
741 | u32 i; |
742 | u32 j; | |
4be44fcd | 743 | acpi_status status; |
1da177e4 | 744 | |
b229cf92 | 745 | ACPI_FUNCTION_TRACE(ev_create_gpe_info_blocks); |
1da177e4 LT |
746 | |
747 | /* Allocate the GPE register information block */ | |
748 | ||
8313524a BM |
749 | gpe_register_info = ACPI_ALLOCATE_ZEROED((acpi_size) gpe_block-> |
750 | register_count * | |
751 | sizeof(struct | |
752 | acpi_gpe_register_info)); | |
1da177e4 | 753 | if (!gpe_register_info) { |
b8e4d893 | 754 | ACPI_ERROR((AE_INFO, |
b229cf92 | 755 | "Could not allocate the GpeRegisterInfo table")); |
4be44fcd | 756 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
757 | } |
758 | ||
759 | /* | |
760 | * Allocate the GPE event_info block. There are eight distinct GPEs | |
96db255c | 761 | * per register. Initialization to zeros is sufficient. |
1da177e4 | 762 | */ |
8313524a BM |
763 | gpe_event_info = ACPI_ALLOCATE_ZEROED(((acpi_size) gpe_block-> |
764 | register_count * | |
765 | ACPI_GPE_REGISTER_WIDTH) * | |
766 | sizeof(struct | |
767 | acpi_gpe_event_info)); | |
1da177e4 | 768 | if (!gpe_event_info) { |
b8e4d893 | 769 | ACPI_ERROR((AE_INFO, |
b229cf92 | 770 | "Could not allocate the GpeEventInfo table")); |
1da177e4 LT |
771 | status = AE_NO_MEMORY; |
772 | goto error_exit; | |
773 | } | |
774 | ||
775 | /* Save the new Info arrays in the GPE block */ | |
776 | ||
777 | gpe_block->register_info = gpe_register_info; | |
4be44fcd | 778 | gpe_block->event_info = gpe_event_info; |
1da177e4 LT |
779 | |
780 | /* | |
96db255c | 781 | * Initialize the GPE Register and Event structures. A goal of these |
9f15fc66 BM |
782 | * tables is to hide the fact that there are two separate GPE register |
783 | * sets in a given GPE hardware block, the status registers occupy the | |
784 | * first half, and the enable registers occupy the second half. | |
1da177e4 LT |
785 | */ |
786 | this_register = gpe_register_info; | |
4be44fcd | 787 | this_event = gpe_event_info; |
1da177e4 LT |
788 | |
789 | for (i = 0; i < gpe_block->register_count; i++) { | |
52fc0b02 | 790 | |
1da177e4 LT |
791 | /* Init the register_info for this GPE register (8 GPEs) */ |
792 | ||
4be44fcd LB |
793 | this_register->base_gpe_number = |
794 | (u8) (gpe_block->block_base_number + | |
795 | (i * ACPI_GPE_REGISTER_WIDTH)); | |
796 | ||
59fa8505 BM |
797 | this_register->status_address.address = |
798 | gpe_block->block_address.address + i; | |
4be44fcd | 799 | |
59fa8505 BM |
800 | this_register->enable_address.address = |
801 | gpe_block->block_address.address + i + | |
802 | gpe_block->register_count; | |
4be44fcd | 803 | |
f3d2e786 BM |
804 | this_register->status_address.space_id = |
805 | gpe_block->block_address.space_id; | |
806 | this_register->enable_address.space_id = | |
807 | gpe_block->block_address.space_id; | |
808 | this_register->status_address.bit_width = | |
4be44fcd | 809 | ACPI_GPE_REGISTER_WIDTH; |
f3d2e786 | 810 | this_register->enable_address.bit_width = |
4be44fcd | 811 | ACPI_GPE_REGISTER_WIDTH; |
ecfbbc7b BM |
812 | this_register->status_address.bit_offset = 0; |
813 | this_register->enable_address.bit_offset = 0; | |
1da177e4 LT |
814 | |
815 | /* Init the event_info for each GPE within this register */ | |
816 | ||
817 | for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) { | |
69874165 AS |
818 | this_event->gpe_number = |
819 | (u8) (this_register->base_gpe_number + j); | |
1da177e4 LT |
820 | this_event->register_info = this_register; |
821 | this_event++; | |
822 | } | |
823 | ||
96db255c BM |
824 | /* Disable all GPEs within this register */ |
825 | ||
c6b5774c | 826 | status = acpi_hw_write(0x00, &this_register->enable_address); |
4be44fcd | 827 | if (ACPI_FAILURE(status)) { |
1da177e4 LT |
828 | goto error_exit; |
829 | } | |
830 | ||
96db255c BM |
831 | /* Clear any pending GPE events within this register */ |
832 | ||
c6b5774c | 833 | status = acpi_hw_write(0xFF, &this_register->status_address); |
4be44fcd | 834 | if (ACPI_FAILURE(status)) { |
1da177e4 LT |
835 | goto error_exit; |
836 | } | |
837 | ||
838 | this_register++; | |
839 | } | |
840 | ||
4be44fcd | 841 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 842 | |
4be44fcd | 843 | error_exit: |
1da177e4 | 844 | if (gpe_register_info) { |
8313524a | 845 | ACPI_FREE(gpe_register_info); |
1da177e4 LT |
846 | } |
847 | if (gpe_event_info) { | |
8313524a | 848 | ACPI_FREE(gpe_event_info); |
1da177e4 LT |
849 | } |
850 | ||
4be44fcd | 851 | return_ACPI_STATUS(status); |
1da177e4 LT |
852 | } |
853 | ||
1da177e4 LT |
854 | /******************************************************************************* |
855 | * | |
856 | * FUNCTION: acpi_ev_create_gpe_block | |
857 | * | |
858 | * PARAMETERS: gpe_device - Handle to the parent GPE block | |
859 | * gpe_block_address - Address and space_iD | |
860 | * register_count - Number of GPE register pairs in the block | |
861 | * gpe_block_base_number - Starting GPE number for the block | |
6f42ccf2 | 862 | * interrupt_number - H/W interrupt for the block |
1da177e4 LT |
863 | * return_gpe_block - Where the new block descriptor is returned |
864 | * | |
865 | * RETURN: Status | |
866 | * | |
96db255c BM |
867 | * DESCRIPTION: Create and Install a block of GPE registers. All GPEs within |
868 | * the block are disabled at exit. | |
869 | * Note: Assumes namespace is locked. | |
1da177e4 LT |
870 | * |
871 | ******************************************************************************/ | |
872 | ||
873 | acpi_status | |
4be44fcd LB |
874 | acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device, |
875 | struct acpi_generic_address *gpe_block_address, | |
876 | u32 register_count, | |
877 | u8 gpe_block_base_number, | |
878 | u32 interrupt_number, | |
879 | struct acpi_gpe_block_info **return_gpe_block) | |
1da177e4 | 880 | { |
4be44fcd | 881 | acpi_status status; |
96db255c | 882 | struct acpi_gpe_block_info *gpe_block; |
1da177e4 | 883 | |
b229cf92 | 884 | ACPI_FUNCTION_TRACE(ev_create_gpe_block); |
1da177e4 LT |
885 | |
886 | if (!register_count) { | |
4be44fcd | 887 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
888 | } |
889 | ||
890 | /* Allocate a new GPE block */ | |
891 | ||
8313524a | 892 | gpe_block = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_block_info)); |
1da177e4 | 893 | if (!gpe_block) { |
4be44fcd | 894 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
895 | } |
896 | ||
897 | /* Initialize the new GPE block */ | |
898 | ||
96db255c | 899 | gpe_block->node = gpe_device; |
1da177e4 LT |
900 | gpe_block->register_count = register_count; |
901 | gpe_block->block_base_number = gpe_block_base_number; | |
1da177e4 | 902 | |
4be44fcd LB |
903 | ACPI_MEMCPY(&gpe_block->block_address, gpe_block_address, |
904 | sizeof(struct acpi_generic_address)); | |
1da177e4 | 905 | |
96db255c BM |
906 | /* |
907 | * Create the register_info and event_info sub-structures | |
908 | * Note: disables and clears all GPEs in the block | |
909 | */ | |
4be44fcd LB |
910 | status = acpi_ev_create_gpe_info_blocks(gpe_block); |
911 | if (ACPI_FAILURE(status)) { | |
8313524a | 912 | ACPI_FREE(gpe_block); |
4be44fcd | 913 | return_ACPI_STATUS(status); |
1da177e4 LT |
914 | } |
915 | ||
96db255c | 916 | /* Install the new block in the global lists */ |
1da177e4 | 917 | |
4be44fcd LB |
918 | status = acpi_ev_install_gpe_block(gpe_block, interrupt_number); |
919 | if (ACPI_FAILURE(status)) { | |
8313524a | 920 | ACPI_FREE(gpe_block); |
4be44fcd | 921 | return_ACPI_STATUS(status); |
1da177e4 LT |
922 | } |
923 | ||
924 | /* Find all GPE methods (_Lxx, _Exx) for this block */ | |
925 | ||
4be44fcd LB |
926 | status = acpi_ns_walk_namespace(ACPI_TYPE_METHOD, gpe_device, |
927 | ACPI_UINT32_MAX, ACPI_NS_WALK_NO_UNLOCK, | |
2263576c LM |
928 | acpi_ev_save_method_info, NULL, |
929 | gpe_block, NULL); | |
1da177e4 | 930 | |
96db255c BM |
931 | /* Return the new block */ |
932 | ||
933 | if (return_gpe_block) { | |
934 | (*return_gpe_block) = gpe_block; | |
935 | } | |
936 | ||
937 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, | |
938 | "GPE %02X to %02X [%4.4s] %u regs on int 0x%X\n", | |
939 | (u32) gpe_block->block_base_number, | |
940 | (u32) (gpe_block->block_base_number + | |
941 | ((gpe_block->register_count * | |
942 | ACPI_GPE_REGISTER_WIDTH) - 1)), | |
943 | gpe_device->name.ascii, gpe_block->register_count, | |
944 | interrupt_number)); | |
945 | ||
e97d6bf1 BM |
946 | /* Update global count of currently available GPEs */ |
947 | ||
948 | acpi_current_gpe_count += register_count * ACPI_GPE_REGISTER_WIDTH; | |
96db255c BM |
949 | return_ACPI_STATUS(AE_OK); |
950 | } | |
951 | ||
952 | /******************************************************************************* | |
953 | * | |
954 | * FUNCTION: acpi_ev_initialize_gpe_block | |
955 | * | |
956 | * PARAMETERS: gpe_device - Handle to the parent GPE block | |
957 | * gpe_block - Gpe Block info | |
958 | * | |
959 | * RETURN: Status | |
960 | * | |
961 | * DESCRIPTION: Initialize and enable a GPE block. First find and run any | |
962 | * _PRT methods associated with the block, then enable the | |
963 | * appropriate GPEs. | |
964 | * Note: Assumes namespace is locked. | |
965 | * | |
966 | ******************************************************************************/ | |
967 | ||
968 | acpi_status | |
969 | acpi_ev_initialize_gpe_block(struct acpi_namespace_node *gpe_device, | |
970 | struct acpi_gpe_block_info *gpe_block) | |
971 | { | |
96db255c BM |
972 | struct acpi_gpe_event_info *gpe_event_info; |
973 | struct acpi_gpe_walk_info gpe_info; | |
974 | u32 wake_gpe_count; | |
975 | u32 gpe_enabled_count; | |
67a119f9 BM |
976 | u32 i; |
977 | u32 j; | |
96db255c | 978 | |
b229cf92 | 979 | ACPI_FUNCTION_TRACE(ev_initialize_gpe_block); |
96db255c BM |
980 | |
981 | /* Ignore a null GPE block (e.g., if no GPE block 1 exists) */ | |
982 | ||
983 | if (!gpe_block) { | |
984 | return_ACPI_STATUS(AE_OK); | |
985 | } | |
986 | ||
1da177e4 | 987 | /* |
96db255c BM |
988 | * Runtime option: Should wake GPEs be enabled at runtime? The default |
989 | * is no, they should only be enabled just as the machine goes to sleep. | |
1da177e4 LT |
990 | */ |
991 | if (acpi_gbl_leave_wake_gpes_disabled) { | |
992 | /* | |
96db255c BM |
993 | * Differentiate runtime vs wake GPEs, via the _PRW control methods. |
994 | * Each GPE that has one or more _PRWs that reference it is by | |
995 | * definition a wake GPE and will not be enabled while the machine | |
996 | * is running. | |
1da177e4 LT |
997 | */ |
998 | gpe_info.gpe_block = gpe_block; | |
999 | gpe_info.gpe_device = gpe_device; | |
1000 | ||
9630bdd9 | 1001 | acpi_ns_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, |
4be44fcd | 1002 | ACPI_UINT32_MAX, ACPI_NS_WALK_UNLOCK, |
2263576c LM |
1003 | acpi_ev_match_prw_and_gpe, NULL, |
1004 | &gpe_info, NULL); | |
1da177e4 LT |
1005 | } |
1006 | ||
1007 | /* | |
9630bdd9 RW |
1008 | * Enable all GPEs that have a corresponding method and aren't |
1009 | * capable of generating wakeups. Any other GPEs within this block | |
1010 | * must be enabled via the acpi_enable_gpe() interface. | |
1da177e4 LT |
1011 | */ |
1012 | wake_gpe_count = 0; | |
1013 | gpe_enabled_count = 0; | |
9630bdd9 RW |
1014 | if (gpe_device == acpi_gbl_fadt_gpe_device) |
1015 | gpe_device = NULL; | |
1da177e4 LT |
1016 | |
1017 | for (i = 0; i < gpe_block->register_count; i++) { | |
9630bdd9 RW |
1018 | for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) { |
1019 | acpi_status status; | |
1020 | acpi_size gpe_index; | |
1021 | int gpe_number; | |
52fc0b02 | 1022 | |
1da177e4 | 1023 | /* Get the info block for this particular GPE */ |
9630bdd9 RW |
1024 | gpe_index = (acpi_size)i * ACPI_GPE_REGISTER_WIDTH + j; |
1025 | gpe_event_info = &gpe_block->event_info[gpe_index]; | |
1da177e4 | 1026 | |
9630bdd9 | 1027 | if (gpe_event_info->flags & ACPI_GPE_CAN_WAKE) { |
1da177e4 | 1028 | wake_gpe_count++; |
9630bdd9 RW |
1029 | if (acpi_gbl_leave_wake_gpes_disabled) |
1030 | continue; | |
1da177e4 | 1031 | } |
9630bdd9 RW |
1032 | |
1033 | if (!(gpe_event_info->flags & ACPI_GPE_DISPATCH_METHOD)) | |
1034 | continue; | |
1035 | ||
1036 | gpe_number = gpe_index + gpe_block->block_base_number; | |
1037 | status = acpi_enable_gpe(gpe_device, gpe_number, | |
1038 | ACPI_GPE_TYPE_RUNTIME); | |
1039 | if (ACPI_FAILURE(status)) | |
1040 | ACPI_ERROR((AE_INFO, | |
1041 | "Failed to enable GPE %02X\n", | |
1042 | gpe_number)); | |
1043 | else | |
1044 | gpe_enabled_count++; | |
1da177e4 LT |
1045 | } |
1046 | } | |
1047 | ||
4be44fcd LB |
1048 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
1049 | "Found %u Wake, Enabled %u Runtime GPEs in this block\n", | |
1050 | wake_gpe_count, gpe_enabled_count)); | |
1da177e4 | 1051 | |
9630bdd9 | 1052 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
1053 | } |
1054 | ||
1da177e4 LT |
1055 | /******************************************************************************* |
1056 | * | |
1057 | * FUNCTION: acpi_ev_gpe_initialize | |
1058 | * | |
1059 | * PARAMETERS: None | |
1060 | * | |
1061 | * RETURN: Status | |
1062 | * | |
1063 | * DESCRIPTION: Initialize the GPE data structures | |
1064 | * | |
1065 | ******************************************************************************/ | |
1066 | ||
4be44fcd | 1067 | acpi_status acpi_ev_gpe_initialize(void) |
1da177e4 | 1068 | { |
4be44fcd LB |
1069 | u32 register_count0 = 0; |
1070 | u32 register_count1 = 0; | |
1071 | u32 gpe_number_max = 0; | |
1072 | acpi_status status; | |
1da177e4 | 1073 | |
b229cf92 | 1074 | ACPI_FUNCTION_TRACE(ev_gpe_initialize); |
1da177e4 | 1075 | |
4be44fcd LB |
1076 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
1077 | if (ACPI_FAILURE(status)) { | |
1078 | return_ACPI_STATUS(status); | |
1da177e4 LT |
1079 | } |
1080 | ||
1081 | /* | |
1082 | * Initialize the GPE Block(s) defined in the FADT | |
1083 | * | |
d4913dc6 BM |
1084 | * Why the GPE register block lengths are divided by 2: From the ACPI |
1085 | * Spec, section "General-Purpose Event Registers", we have: | |
1da177e4 LT |
1086 | * |
1087 | * "Each register block contains two registers of equal length | |
1088 | * GPEx_STS and GPEx_EN (where x is 0 or 1). The length of the | |
1089 | * GPE0_STS and GPE0_EN registers is equal to half the GPE0_LEN | |
1090 | * The length of the GPE1_STS and GPE1_EN registers is equal to | |
1091 | * half the GPE1_LEN. If a generic register block is not supported | |
1092 | * then its respective block pointer and block length values in the | |
1093 | * FADT table contain zeros. The GPE0_LEN and GPE1_LEN do not need | |
1094 | * to be the same size." | |
1095 | */ | |
1096 | ||
1097 | /* | |
1098 | * Determine the maximum GPE number for this machine. | |
1099 | * | |
1100 | * Note: both GPE0 and GPE1 are optional, and either can exist without | |
1101 | * the other. | |
1102 | * | |
1103 | * If EITHER the register length OR the block address are zero, then that | |
1104 | * particular block is not supported. | |
1105 | */ | |
f3d2e786 BM |
1106 | if (acpi_gbl_FADT.gpe0_block_length && |
1107 | acpi_gbl_FADT.xgpe0_block.address) { | |
52fc0b02 | 1108 | |
1da177e4 LT |
1109 | /* GPE block 0 exists (has both length and address > 0) */ |
1110 | ||
f3d2e786 | 1111 | register_count0 = (u16) (acpi_gbl_FADT.gpe0_block_length / 2); |
1da177e4 | 1112 | |
4be44fcd LB |
1113 | gpe_number_max = |
1114 | (register_count0 * ACPI_GPE_REGISTER_WIDTH) - 1; | |
1da177e4 LT |
1115 | |
1116 | /* Install GPE Block 0 */ | |
1117 | ||
4be44fcd | 1118 | status = acpi_ev_create_gpe_block(acpi_gbl_fadt_gpe_device, |
f3d2e786 | 1119 | &acpi_gbl_FADT.xgpe0_block, |
4be44fcd | 1120 | register_count0, 0, |
f3d2e786 | 1121 | acpi_gbl_FADT.sci_interrupt, |
4be44fcd | 1122 | &acpi_gbl_gpe_fadt_blocks[0]); |
1da177e4 | 1123 | |
4be44fcd | 1124 | if (ACPI_FAILURE(status)) { |
b8e4d893 BM |
1125 | ACPI_EXCEPTION((AE_INFO, status, |
1126 | "Could not create GPE Block 0")); | |
1da177e4 LT |
1127 | } |
1128 | } | |
1129 | ||
f3d2e786 BM |
1130 | if (acpi_gbl_FADT.gpe1_block_length && |
1131 | acpi_gbl_FADT.xgpe1_block.address) { | |
52fc0b02 | 1132 | |
1da177e4 LT |
1133 | /* GPE block 1 exists (has both length and address > 0) */ |
1134 | ||
f3d2e786 | 1135 | register_count1 = (u16) (acpi_gbl_FADT.gpe1_block_length / 2); |
1da177e4 LT |
1136 | |
1137 | /* Check for GPE0/GPE1 overlap (if both banks exist) */ | |
1138 | ||
1139 | if ((register_count0) && | |
f3d2e786 | 1140 | (gpe_number_max >= acpi_gbl_FADT.gpe1_base)) { |
b8e4d893 | 1141 | ACPI_ERROR((AE_INFO, |
d4913dc6 BM |
1142 | "GPE0 block (GPE 0 to %d) overlaps the GPE1 block " |
1143 | "(GPE %d to %d) - Ignoring GPE1", | |
f3d2e786 BM |
1144 | gpe_number_max, acpi_gbl_FADT.gpe1_base, |
1145 | acpi_gbl_FADT.gpe1_base + | |
b8e4d893 BM |
1146 | ((register_count1 * |
1147 | ACPI_GPE_REGISTER_WIDTH) - 1))); | |
1da177e4 LT |
1148 | |
1149 | /* Ignore GPE1 block by setting the register count to zero */ | |
1150 | ||
1151 | register_count1 = 0; | |
4be44fcd | 1152 | } else { |
1da177e4 LT |
1153 | /* Install GPE Block 1 */ |
1154 | ||
4be44fcd LB |
1155 | status = |
1156 | acpi_ev_create_gpe_block(acpi_gbl_fadt_gpe_device, | |
f3d2e786 | 1157 | &acpi_gbl_FADT.xgpe1_block, |
4be44fcd | 1158 | register_count1, |
f3d2e786 BM |
1159 | acpi_gbl_FADT.gpe1_base, |
1160 | acpi_gbl_FADT. | |
1161 | sci_interrupt, | |
4be44fcd LB |
1162 | &acpi_gbl_gpe_fadt_blocks |
1163 | [1]); | |
1164 | ||
1165 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
1166 | ACPI_EXCEPTION((AE_INFO, status, |
1167 | "Could not create GPE Block 1")); | |
1da177e4 LT |
1168 | } |
1169 | ||
1170 | /* | |
1171 | * GPE0 and GPE1 do not have to be contiguous in the GPE number | |
1172 | * space. However, GPE0 always starts at GPE number zero. | |
1173 | */ | |
f3d2e786 | 1174 | gpe_number_max = acpi_gbl_FADT.gpe1_base + |
4be44fcd | 1175 | ((register_count1 * ACPI_GPE_REGISTER_WIDTH) - 1); |
1da177e4 LT |
1176 | } |
1177 | } | |
1178 | ||
1179 | /* Exit if there are no GPE registers */ | |
1180 | ||
1181 | if ((register_count0 + register_count1) == 0) { | |
52fc0b02 | 1182 | |
1da177e4 LT |
1183 | /* GPEs are not required by ACPI, this is OK */ |
1184 | ||
4be44fcd LB |
1185 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
1186 | "There are no GPE blocks defined in the FADT\n")); | |
1da177e4 LT |
1187 | status = AE_OK; |
1188 | goto cleanup; | |
1189 | } | |
1190 | ||
1191 | /* Check for Max GPE number out-of-range */ | |
1192 | ||
1193 | if (gpe_number_max > ACPI_GPE_MAX) { | |
b8e4d893 BM |
1194 | ACPI_ERROR((AE_INFO, |
1195 | "Maximum GPE number from FADT is too large: 0x%X", | |
1196 | gpe_number_max)); | |
1da177e4 LT |
1197 | status = AE_BAD_VALUE; |
1198 | goto cleanup; | |
1199 | } | |
1200 | ||
4be44fcd LB |
1201 | cleanup: |
1202 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); | |
1203 | return_ACPI_STATUS(AE_OK); | |
1da177e4 | 1204 | } |