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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: evgpeblk - GPE block creation and initialization. | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
8 | * Copyright (C) 2000 - 2005, R. Byron Moore | |
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 | |
49 | ACPI_MODULE_NAME ("evgpeblk") | |
50 | ||
44f6c012 RM |
51 | /* Local prototypes */ |
52 | ||
53 | static acpi_status | |
54 | acpi_ev_save_method_info ( | |
55 | acpi_handle obj_handle, | |
56 | u32 level, | |
57 | void *obj_desc, | |
58 | void **return_value); | |
59 | ||
60 | static acpi_status | |
61 | acpi_ev_match_prw_and_gpe ( | |
62 | acpi_handle obj_handle, | |
63 | u32 level, | |
64 | void *info, | |
65 | void **return_value); | |
66 | ||
67 | static struct acpi_gpe_xrupt_info * | |
68 | acpi_ev_get_gpe_xrupt_block ( | |
69 | u32 interrupt_level); | |
70 | ||
71 | static acpi_status | |
72 | acpi_ev_delete_gpe_xrupt ( | |
73 | struct acpi_gpe_xrupt_info *gpe_xrupt); | |
74 | ||
75 | static acpi_status | |
76 | acpi_ev_install_gpe_block ( | |
77 | struct acpi_gpe_block_info *gpe_block, | |
78 | u32 interrupt_level); | |
79 | ||
80 | static acpi_status | |
81 | acpi_ev_create_gpe_info_blocks ( | |
82 | struct acpi_gpe_block_info *gpe_block); | |
83 | ||
1da177e4 LT |
84 | |
85 | /******************************************************************************* | |
86 | * | |
87 | * FUNCTION: acpi_ev_valid_gpe_event | |
88 | * | |
89 | * PARAMETERS: gpe_event_info - Info for this GPE | |
90 | * | |
91 | * RETURN: TRUE if the gpe_event is valid | |
92 | * | |
93 | * DESCRIPTION: Validate a GPE event. DO NOT CALL FROM INTERRUPT LEVEL. | |
94 | * Should be called only when the GPE lists are semaphore locked | |
95 | * and not subject to change. | |
96 | * | |
97 | ******************************************************************************/ | |
98 | ||
99 | u8 | |
100 | acpi_ev_valid_gpe_event ( | |
101 | struct acpi_gpe_event_info *gpe_event_info) | |
102 | { | |
103 | struct acpi_gpe_xrupt_info *gpe_xrupt_block; | |
104 | struct acpi_gpe_block_info *gpe_block; | |
105 | ||
106 | ||
107 | ACPI_FUNCTION_ENTRY (); | |
108 | ||
109 | ||
110 | /* No need for spin lock since we are not changing any list elements */ | |
111 | ||
112 | /* Walk the GPE interrupt levels */ | |
113 | ||
114 | gpe_xrupt_block = acpi_gbl_gpe_xrupt_list_head; | |
115 | while (gpe_xrupt_block) { | |
116 | gpe_block = gpe_xrupt_block->gpe_block_list_head; | |
117 | ||
118 | /* Walk the GPE blocks on this interrupt level */ | |
119 | ||
120 | while (gpe_block) { | |
121 | if ((&gpe_block->event_info[0] <= gpe_event_info) && | |
122 | (&gpe_block->event_info[((acpi_size) gpe_block->register_count) * 8] > gpe_event_info)) { | |
123 | return (TRUE); | |
124 | } | |
125 | ||
126 | gpe_block = gpe_block->next; | |
127 | } | |
128 | ||
129 | gpe_xrupt_block = gpe_xrupt_block->next; | |
130 | } | |
131 | ||
132 | return (FALSE); | |
133 | } | |
134 | ||
135 | ||
136 | /******************************************************************************* | |
137 | * | |
138 | * FUNCTION: acpi_ev_walk_gpe_list | |
139 | * | |
140 | * PARAMETERS: gpe_walk_callback - Routine called for each GPE block | |
141 | * Flags - ACPI_NOT_ISR or ACPI_ISR | |
142 | * | |
143 | * RETURN: Status | |
144 | * | |
145 | * DESCRIPTION: Walk the GPE lists. | |
146 | * | |
147 | ******************************************************************************/ | |
148 | ||
149 | acpi_status | |
150 | acpi_ev_walk_gpe_list ( | |
151 | ACPI_GPE_CALLBACK gpe_walk_callback, | |
152 | u32 flags) | |
153 | { | |
154 | struct acpi_gpe_block_info *gpe_block; | |
155 | struct acpi_gpe_xrupt_info *gpe_xrupt_info; | |
156 | acpi_status status = AE_OK; | |
157 | ||
158 | ||
159 | ACPI_FUNCTION_TRACE ("ev_walk_gpe_list"); | |
160 | ||
161 | ||
162 | acpi_os_acquire_lock (acpi_gbl_gpe_lock, flags); | |
163 | ||
164 | /* Walk the interrupt level descriptor list */ | |
165 | ||
166 | gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head; | |
167 | while (gpe_xrupt_info) { | |
168 | /* Walk all Gpe Blocks attached to this interrupt level */ | |
169 | ||
170 | gpe_block = gpe_xrupt_info->gpe_block_list_head; | |
171 | while (gpe_block) { | |
172 | /* One callback per GPE block */ | |
173 | ||
174 | status = gpe_walk_callback (gpe_xrupt_info, gpe_block); | |
175 | if (ACPI_FAILURE (status)) { | |
176 | goto unlock_and_exit; | |
177 | } | |
178 | ||
179 | gpe_block = gpe_block->next; | |
180 | } | |
181 | ||
182 | gpe_xrupt_info = gpe_xrupt_info->next; | |
183 | } | |
184 | ||
185 | unlock_and_exit: | |
186 | acpi_os_release_lock (acpi_gbl_gpe_lock, flags); | |
187 | return_ACPI_STATUS (status); | |
188 | } | |
189 | ||
190 | ||
44f6c012 | 191 | /******************************************************************************* |
1da177e4 LT |
192 | * |
193 | * FUNCTION: acpi_ev_delete_gpe_handlers | |
194 | * | |
195 | * PARAMETERS: gpe_xrupt_info - GPE Interrupt info | |
196 | * gpe_block - Gpe Block info | |
197 | * | |
198 | * RETURN: Status | |
199 | * | |
200 | * DESCRIPTION: Delete all Handler objects found in the GPE data structs. | |
201 | * Used only prior to termination. | |
202 | * | |
203 | ******************************************************************************/ | |
204 | ||
205 | acpi_status | |
206 | acpi_ev_delete_gpe_handlers ( | |
207 | struct acpi_gpe_xrupt_info *gpe_xrupt_info, | |
208 | struct acpi_gpe_block_info *gpe_block) | |
209 | { | |
210 | struct acpi_gpe_event_info *gpe_event_info; | |
211 | acpi_native_uint i; | |
212 | acpi_native_uint j; | |
213 | ||
214 | ||
215 | ACPI_FUNCTION_TRACE ("ev_delete_gpe_handlers"); | |
216 | ||
217 | ||
218 | /* Examine each GPE Register within the block */ | |
219 | ||
220 | for (i = 0; i < gpe_block->register_count; i++) { | |
221 | /* Now look at the individual GPEs in this byte register */ | |
222 | ||
223 | for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) { | |
224 | gpe_event_info = &gpe_block->event_info[(i * ACPI_GPE_REGISTER_WIDTH) + j]; | |
225 | ||
44f6c012 RM |
226 | if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) == |
227 | ACPI_GPE_DISPATCH_HANDLER) { | |
1da177e4 LT |
228 | ACPI_MEM_FREE (gpe_event_info->dispatch.handler); |
229 | gpe_event_info->dispatch.handler = NULL; | |
230 | gpe_event_info->flags &= ~ACPI_GPE_DISPATCH_MASK; | |
231 | } | |
232 | } | |
233 | } | |
234 | ||
235 | return_ACPI_STATUS (AE_OK); | |
236 | } | |
237 | ||
238 | ||
239 | /******************************************************************************* | |
240 | * | |
241 | * FUNCTION: acpi_ev_save_method_info | |
242 | * | |
243 | * PARAMETERS: Callback from walk_namespace | |
244 | * | |
245 | * RETURN: Status | |
246 | * | |
247 | * DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a | |
248 | * control method under the _GPE portion of the namespace. | |
249 | * Extract the name and GPE type from the object, saving this | |
250 | * information for quick lookup during GPE dispatch | |
251 | * | |
252 | * The name of each GPE control method is of the form: | |
253 | * "_Lxx" or "_Exx" | |
254 | * Where: | |
255 | * L - means that the GPE is level triggered | |
256 | * E - means that the GPE is edge triggered | |
257 | * xx - is the GPE number [in HEX] | |
258 | * | |
259 | ******************************************************************************/ | |
260 | ||
261 | static acpi_status | |
262 | acpi_ev_save_method_info ( | |
263 | acpi_handle obj_handle, | |
264 | u32 level, | |
265 | void *obj_desc, | |
266 | void **return_value) | |
267 | { | |
268 | struct acpi_gpe_block_info *gpe_block = (void *) obj_desc; | |
269 | struct acpi_gpe_event_info *gpe_event_info; | |
270 | u32 gpe_number; | |
271 | char name[ACPI_NAME_SIZE + 1]; | |
272 | u8 type; | |
273 | acpi_status status; | |
274 | ||
275 | ||
276 | ACPI_FUNCTION_TRACE ("ev_save_method_info"); | |
277 | ||
278 | ||
279 | /* | |
280 | * _Lxx and _Exx GPE method support | |
281 | * | |
282 | * 1) Extract the name from the object and convert to a string | |
283 | */ | |
284 | ACPI_MOVE_32_TO_32 (name, | |
285 | &((struct acpi_namespace_node *) obj_handle)->name.integer); | |
286 | name[ACPI_NAME_SIZE] = 0; | |
287 | ||
288 | /* | |
289 | * 2) Edge/Level determination is based on the 2nd character | |
290 | * of the method name | |
291 | * | |
292 | * NOTE: Default GPE type is RUNTIME. May be changed later to WAKE | |
293 | * if a _PRW object is found that points to this GPE. | |
294 | */ | |
295 | switch (name[1]) { | |
296 | case 'L': | |
297 | type = ACPI_GPE_LEVEL_TRIGGERED; | |
298 | break; | |
299 | ||
300 | case 'E': | |
301 | type = ACPI_GPE_EDGE_TRIGGERED; | |
302 | break; | |
303 | ||
304 | default: | |
305 | /* Unknown method type, just ignore it! */ | |
306 | ||
307 | ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, | |
308 | "Unknown GPE method type: %s (name not of form _Lxx or _Exx)\n", | |
309 | name)); | |
310 | return_ACPI_STATUS (AE_OK); | |
311 | } | |
312 | ||
313 | /* Convert the last two characters of the name to the GPE Number */ | |
314 | ||
315 | gpe_number = ACPI_STRTOUL (&name[2], NULL, 16); | |
316 | if (gpe_number == ACPI_UINT32_MAX) { | |
317 | /* Conversion failed; invalid method, just ignore it */ | |
318 | ||
319 | ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, | |
320 | "Could not extract GPE number from name: %s (name is not of form _Lxx or _Exx)\n", | |
321 | name)); | |
322 | return_ACPI_STATUS (AE_OK); | |
323 | } | |
324 | ||
325 | /* Ensure that we have a valid GPE number for this GPE block */ | |
326 | ||
327 | if ((gpe_number < gpe_block->block_base_number) || | |
328 | (gpe_number >= (gpe_block->block_base_number + (gpe_block->register_count * 8)))) { | |
329 | /* | |
330 | * Not valid for this GPE block, just ignore it | |
331 | * However, it may be valid for a different GPE block, since GPE0 and GPE1 | |
332 | * methods both appear under \_GPE. | |
333 | */ | |
334 | return_ACPI_STATUS (AE_OK); | |
335 | } | |
336 | ||
337 | /* | |
338 | * Now we can add this information to the gpe_event_info block | |
339 | * for use during dispatch of this GPE. Default type is RUNTIME, although | |
340 | * this may change when the _PRW methods are executed later. | |
341 | */ | |
342 | gpe_event_info = &gpe_block->event_info[gpe_number - gpe_block->block_base_number]; | |
343 | ||
344 | gpe_event_info->flags = (u8) (type | ACPI_GPE_DISPATCH_METHOD | | |
345 | ACPI_GPE_TYPE_RUNTIME); | |
346 | ||
347 | gpe_event_info->dispatch.method_node = (struct acpi_namespace_node *) obj_handle; | |
348 | ||
349 | /* Update enable mask, but don't enable the HW GPE as of yet */ | |
350 | ||
351 | status = acpi_ev_enable_gpe (gpe_event_info, FALSE); | |
352 | ||
353 | ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, | |
354 | "Registered GPE method %s as GPE number 0x%.2X\n", | |
355 | name, gpe_number)); | |
356 | return_ACPI_STATUS (status); | |
357 | } | |
358 | ||
359 | ||
360 | /******************************************************************************* | |
361 | * | |
362 | * FUNCTION: acpi_ev_match_prw_and_gpe | |
363 | * | |
364 | * PARAMETERS: Callback from walk_namespace | |
365 | * | |
366 | * RETURN: Status. NOTE: We ignore errors so that the _PRW walk is | |
367 | * not aborted on a single _PRW failure. | |
368 | * | |
369 | * DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a | |
370 | * Device. Run the _PRW method. If present, extract the GPE | |
371 | * number and mark the GPE as a WAKE GPE. | |
372 | * | |
373 | ******************************************************************************/ | |
374 | ||
375 | static acpi_status | |
376 | acpi_ev_match_prw_and_gpe ( | |
377 | acpi_handle obj_handle, | |
378 | u32 level, | |
379 | void *info, | |
380 | void **return_value) | |
381 | { | |
382 | struct acpi_gpe_walk_info *gpe_info = (void *) info; | |
383 | struct acpi_namespace_node *gpe_device; | |
384 | struct acpi_gpe_block_info *gpe_block; | |
385 | struct acpi_namespace_node *target_gpe_device; | |
386 | struct acpi_gpe_event_info *gpe_event_info; | |
387 | union acpi_operand_object *pkg_desc; | |
388 | union acpi_operand_object *obj_desc; | |
389 | u32 gpe_number; | |
390 | acpi_status status; | |
391 | ||
392 | ||
393 | ACPI_FUNCTION_TRACE ("ev_match_prw_and_gpe"); | |
394 | ||
395 | ||
396 | /* Check for a _PRW method under this device */ | |
397 | ||
398 | status = acpi_ut_evaluate_object (obj_handle, METHOD_NAME__PRW, | |
399 | ACPI_BTYPE_PACKAGE, &pkg_desc); | |
400 | if (ACPI_FAILURE (status)) { | |
401 | /* Ignore all errors from _PRW, we don't want to abort the subsystem */ | |
402 | ||
403 | return_ACPI_STATUS (AE_OK); | |
404 | } | |
405 | ||
406 | /* The returned _PRW package must have at least two elements */ | |
407 | ||
408 | if (pkg_desc->package.count < 2) { | |
409 | goto cleanup; | |
410 | } | |
411 | ||
412 | /* Extract pointers from the input context */ | |
413 | ||
414 | gpe_device = gpe_info->gpe_device; | |
415 | gpe_block = gpe_info->gpe_block; | |
416 | ||
417 | /* | |
418 | * The _PRW object must return a package, we are only interested | |
419 | * in the first element | |
420 | */ | |
421 | obj_desc = pkg_desc->package.elements[0]; | |
422 | ||
423 | if (ACPI_GET_OBJECT_TYPE (obj_desc) == ACPI_TYPE_INTEGER) { | |
424 | /* Use FADT-defined GPE device (from definition of _PRW) */ | |
425 | ||
426 | target_gpe_device = acpi_gbl_fadt_gpe_device; | |
427 | ||
428 | /* Integer is the GPE number in the FADT described GPE blocks */ | |
429 | ||
430 | gpe_number = (u32) obj_desc->integer.value; | |
431 | } | |
432 | else if (ACPI_GET_OBJECT_TYPE (obj_desc) == ACPI_TYPE_PACKAGE) { | |
433 | /* Package contains a GPE reference and GPE number within a GPE block */ | |
434 | ||
435 | if ((obj_desc->package.count < 2) || | |
436 | (ACPI_GET_OBJECT_TYPE (obj_desc->package.elements[0]) != ACPI_TYPE_LOCAL_REFERENCE) || | |
437 | (ACPI_GET_OBJECT_TYPE (obj_desc->package.elements[1]) != ACPI_TYPE_INTEGER)) { | |
438 | goto cleanup; | |
439 | } | |
440 | ||
441 | /* Get GPE block reference and decode */ | |
442 | ||
443 | target_gpe_device = obj_desc->package.elements[0]->reference.node; | |
444 | gpe_number = (u32) obj_desc->package.elements[1]->integer.value; | |
445 | } | |
446 | else { | |
447 | /* Unknown type, just ignore it */ | |
448 | ||
449 | goto cleanup; | |
450 | } | |
451 | ||
452 | /* | |
453 | * Is this GPE within this block? | |
454 | * | |
455 | * TRUE iff these conditions are true: | |
456 | * 1) The GPE devices match. | |
457 | * 2) The GPE index(number) is within the range of the Gpe Block | |
458 | * associated with the GPE device. | |
459 | */ | |
460 | if ((gpe_device == target_gpe_device) && | |
461 | (gpe_number >= gpe_block->block_base_number) && | |
462 | (gpe_number < gpe_block->block_base_number + (gpe_block->register_count * 8))) { | |
463 | gpe_event_info = &gpe_block->event_info[gpe_number - gpe_block->block_base_number]; | |
464 | ||
465 | /* Mark GPE for WAKE-ONLY but WAKE_DISABLED */ | |
466 | ||
467 | gpe_event_info->flags &= ~(ACPI_GPE_WAKE_ENABLED | ACPI_GPE_RUN_ENABLED); | |
468 | status = acpi_ev_set_gpe_type (gpe_event_info, ACPI_GPE_TYPE_WAKE); | |
469 | if (ACPI_FAILURE (status)) { | |
470 | goto cleanup; | |
471 | } | |
472 | status = acpi_ev_update_gpe_enable_masks (gpe_event_info, ACPI_GPE_DISABLE); | |
473 | } | |
474 | ||
475 | cleanup: | |
476 | acpi_ut_remove_reference (pkg_desc); | |
477 | return_ACPI_STATUS (AE_OK); | |
478 | } | |
479 | ||
480 | ||
481 | /******************************************************************************* | |
482 | * | |
483 | * FUNCTION: acpi_ev_get_gpe_xrupt_block | |
484 | * | |
485 | * PARAMETERS: interrupt_level - Interrupt for a GPE block | |
486 | * | |
487 | * RETURN: A GPE interrupt block | |
488 | * | |
489 | * DESCRIPTION: Get or Create a GPE interrupt block. There is one interrupt | |
490 | * block per unique interrupt level used for GPEs. | |
491 | * Should be called only when the GPE lists are semaphore locked | |
492 | * and not subject to change. | |
493 | * | |
494 | ******************************************************************************/ | |
495 | ||
496 | static struct acpi_gpe_xrupt_info * | |
497 | acpi_ev_get_gpe_xrupt_block ( | |
498 | u32 interrupt_level) | |
499 | { | |
500 | struct acpi_gpe_xrupt_info *next_gpe_xrupt; | |
501 | struct acpi_gpe_xrupt_info *gpe_xrupt; | |
502 | acpi_status status; | |
503 | ||
504 | ||
505 | ACPI_FUNCTION_TRACE ("ev_get_gpe_xrupt_block"); | |
506 | ||
507 | ||
44f6c012 | 508 | /* No need for lock since we are not changing any list elements here */ |
1da177e4 LT |
509 | |
510 | next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head; | |
511 | while (next_gpe_xrupt) { | |
512 | if (next_gpe_xrupt->interrupt_level == interrupt_level) { | |
513 | return_PTR (next_gpe_xrupt); | |
514 | } | |
515 | ||
516 | next_gpe_xrupt = next_gpe_xrupt->next; | |
517 | } | |
518 | ||
519 | /* Not found, must allocate a new xrupt descriptor */ | |
520 | ||
521 | gpe_xrupt = ACPI_MEM_CALLOCATE (sizeof (struct acpi_gpe_xrupt_info)); | |
522 | if (!gpe_xrupt) { | |
523 | return_PTR (NULL); | |
524 | } | |
525 | ||
526 | gpe_xrupt->interrupt_level = interrupt_level; | |
527 | ||
528 | /* Install new interrupt descriptor with spin lock */ | |
529 | ||
530 | acpi_os_acquire_lock (acpi_gbl_gpe_lock, ACPI_NOT_ISR); | |
531 | if (acpi_gbl_gpe_xrupt_list_head) { | |
532 | next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head; | |
533 | while (next_gpe_xrupt->next) { | |
534 | next_gpe_xrupt = next_gpe_xrupt->next; | |
535 | } | |
536 | ||
537 | next_gpe_xrupt->next = gpe_xrupt; | |
538 | gpe_xrupt->previous = next_gpe_xrupt; | |
539 | } | |
540 | else { | |
541 | acpi_gbl_gpe_xrupt_list_head = gpe_xrupt; | |
542 | } | |
543 | acpi_os_release_lock (acpi_gbl_gpe_lock, ACPI_NOT_ISR); | |
544 | ||
545 | /* Install new interrupt handler if not SCI_INT */ | |
546 | ||
547 | if (interrupt_level != acpi_gbl_FADT->sci_int) { | |
548 | status = acpi_os_install_interrupt_handler (interrupt_level, | |
549 | acpi_ev_gpe_xrupt_handler, gpe_xrupt); | |
550 | if (ACPI_FAILURE (status)) { | |
551 | ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, | |
552 | "Could not install GPE interrupt handler at level 0x%X\n", | |
553 | interrupt_level)); | |
554 | return_PTR (NULL); | |
555 | } | |
556 | } | |
557 | ||
558 | return_PTR (gpe_xrupt); | |
559 | } | |
560 | ||
561 | ||
562 | /******************************************************************************* | |
563 | * | |
564 | * FUNCTION: acpi_ev_delete_gpe_xrupt | |
565 | * | |
566 | * PARAMETERS: gpe_xrupt - A GPE interrupt info block | |
567 | * | |
568 | * RETURN: Status | |
569 | * | |
570 | * DESCRIPTION: Remove and free a gpe_xrupt block. Remove an associated | |
571 | * interrupt handler if not the SCI interrupt. | |
572 | * | |
573 | ******************************************************************************/ | |
574 | ||
575 | static acpi_status | |
576 | acpi_ev_delete_gpe_xrupt ( | |
577 | struct acpi_gpe_xrupt_info *gpe_xrupt) | |
578 | { | |
579 | acpi_status status; | |
580 | ||
581 | ||
582 | ACPI_FUNCTION_TRACE ("ev_delete_gpe_xrupt"); | |
583 | ||
584 | ||
585 | /* We never want to remove the SCI interrupt handler */ | |
586 | ||
587 | if (gpe_xrupt->interrupt_level == acpi_gbl_FADT->sci_int) { | |
588 | gpe_xrupt->gpe_block_list_head = NULL; | |
589 | return_ACPI_STATUS (AE_OK); | |
590 | } | |
591 | ||
592 | /* Disable this interrupt */ | |
593 | ||
594 | status = acpi_os_remove_interrupt_handler (gpe_xrupt->interrupt_level, | |
595 | acpi_ev_gpe_xrupt_handler); | |
596 | if (ACPI_FAILURE (status)) { | |
597 | return_ACPI_STATUS (status); | |
598 | } | |
599 | ||
600 | /* Unlink the interrupt block with lock */ | |
601 | ||
602 | acpi_os_acquire_lock (acpi_gbl_gpe_lock, ACPI_NOT_ISR); | |
603 | if (gpe_xrupt->previous) { | |
604 | gpe_xrupt->previous->next = gpe_xrupt->next; | |
605 | } | |
606 | ||
607 | if (gpe_xrupt->next) { | |
608 | gpe_xrupt->next->previous = gpe_xrupt->previous; | |
609 | } | |
610 | acpi_os_release_lock (acpi_gbl_gpe_lock, ACPI_NOT_ISR); | |
611 | ||
612 | /* Free the block */ | |
613 | ||
614 | ACPI_MEM_FREE (gpe_xrupt); | |
615 | return_ACPI_STATUS (AE_OK); | |
616 | } | |
617 | ||
618 | ||
619 | /******************************************************************************* | |
620 | * | |
621 | * FUNCTION: acpi_ev_install_gpe_block | |
622 | * | |
623 | * PARAMETERS: gpe_block - New GPE block | |
624 | * interrupt_level - Level to be associated with this GPE block | |
625 | * | |
626 | * RETURN: Status | |
627 | * | |
628 | * DESCRIPTION: Install new GPE block with mutex support | |
629 | * | |
630 | ******************************************************************************/ | |
631 | ||
632 | static acpi_status | |
633 | acpi_ev_install_gpe_block ( | |
634 | struct acpi_gpe_block_info *gpe_block, | |
635 | u32 interrupt_level) | |
636 | { | |
637 | struct acpi_gpe_block_info *next_gpe_block; | |
638 | struct acpi_gpe_xrupt_info *gpe_xrupt_block; | |
639 | acpi_status status; | |
640 | ||
641 | ||
642 | ACPI_FUNCTION_TRACE ("ev_install_gpe_block"); | |
643 | ||
644 | ||
645 | status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS); | |
646 | if (ACPI_FAILURE (status)) { | |
647 | return_ACPI_STATUS (status); | |
648 | } | |
649 | ||
650 | gpe_xrupt_block = acpi_ev_get_gpe_xrupt_block (interrupt_level); | |
651 | if (!gpe_xrupt_block) { | |
652 | status = AE_NO_MEMORY; | |
653 | goto unlock_and_exit; | |
654 | } | |
655 | ||
44f6c012 | 656 | /* Install the new block at the end of the list with lock */ |
1da177e4 LT |
657 | |
658 | acpi_os_acquire_lock (acpi_gbl_gpe_lock, ACPI_NOT_ISR); | |
659 | if (gpe_xrupt_block->gpe_block_list_head) { | |
660 | next_gpe_block = gpe_xrupt_block->gpe_block_list_head; | |
661 | while (next_gpe_block->next) { | |
662 | next_gpe_block = next_gpe_block->next; | |
663 | } | |
664 | ||
665 | next_gpe_block->next = gpe_block; | |
666 | gpe_block->previous = next_gpe_block; | |
667 | } | |
668 | else { | |
669 | gpe_xrupt_block->gpe_block_list_head = gpe_block; | |
670 | } | |
671 | ||
672 | gpe_block->xrupt_block = gpe_xrupt_block; | |
673 | acpi_os_release_lock (acpi_gbl_gpe_lock, ACPI_NOT_ISR); | |
674 | ||
675 | unlock_and_exit: | |
676 | status = acpi_ut_release_mutex (ACPI_MTX_EVENTS); | |
677 | return_ACPI_STATUS (status); | |
678 | } | |
679 | ||
680 | ||
681 | /******************************************************************************* | |
682 | * | |
683 | * FUNCTION: acpi_ev_delete_gpe_block | |
684 | * | |
685 | * PARAMETERS: gpe_block - Existing GPE block | |
686 | * | |
687 | * RETURN: Status | |
688 | * | |
689 | * DESCRIPTION: Remove a GPE block | |
690 | * | |
691 | ******************************************************************************/ | |
692 | ||
693 | acpi_status | |
694 | acpi_ev_delete_gpe_block ( | |
695 | struct acpi_gpe_block_info *gpe_block) | |
696 | { | |
697 | acpi_status status; | |
698 | ||
699 | ||
700 | ACPI_FUNCTION_TRACE ("ev_install_gpe_block"); | |
701 | ||
702 | ||
703 | status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS); | |
704 | if (ACPI_FAILURE (status)) { | |
705 | return_ACPI_STATUS (status); | |
706 | } | |
707 | ||
708 | /* Disable all GPEs in this block */ | |
709 | ||
710 | status = acpi_hw_disable_gpe_block (gpe_block->xrupt_block, gpe_block); | |
711 | ||
712 | if (!gpe_block->previous && !gpe_block->next) { | |
713 | /* This is the last gpe_block on this interrupt */ | |
714 | ||
715 | status = acpi_ev_delete_gpe_xrupt (gpe_block->xrupt_block); | |
716 | if (ACPI_FAILURE (status)) { | |
717 | goto unlock_and_exit; | |
718 | } | |
719 | } | |
720 | else { | |
721 | /* Remove the block on this interrupt with lock */ | |
722 | ||
723 | acpi_os_acquire_lock (acpi_gbl_gpe_lock, ACPI_NOT_ISR); | |
724 | if (gpe_block->previous) { | |
725 | gpe_block->previous->next = gpe_block->next; | |
726 | } | |
727 | else { | |
728 | gpe_block->xrupt_block->gpe_block_list_head = gpe_block->next; | |
729 | } | |
730 | ||
731 | if (gpe_block->next) { | |
732 | gpe_block->next->previous = gpe_block->previous; | |
733 | } | |
734 | acpi_os_release_lock (acpi_gbl_gpe_lock, ACPI_NOT_ISR); | |
735 | } | |
736 | ||
737 | /* Free the gpe_block */ | |
738 | ||
739 | ACPI_MEM_FREE (gpe_block->register_info); | |
740 | ACPI_MEM_FREE (gpe_block->event_info); | |
741 | ACPI_MEM_FREE (gpe_block); | |
742 | ||
743 | unlock_and_exit: | |
744 | status = acpi_ut_release_mutex (ACPI_MTX_EVENTS); | |
745 | return_ACPI_STATUS (status); | |
746 | } | |
747 | ||
748 | ||
749 | /******************************************************************************* | |
750 | * | |
751 | * FUNCTION: acpi_ev_create_gpe_info_blocks | |
752 | * | |
753 | * PARAMETERS: gpe_block - New GPE block | |
754 | * | |
755 | * RETURN: Status | |
756 | * | |
757 | * DESCRIPTION: Create the register_info and event_info blocks for this GPE block | |
758 | * | |
759 | ******************************************************************************/ | |
760 | ||
761 | static acpi_status | |
762 | acpi_ev_create_gpe_info_blocks ( | |
763 | struct acpi_gpe_block_info *gpe_block) | |
764 | { | |
765 | struct acpi_gpe_register_info *gpe_register_info = NULL; | |
766 | struct acpi_gpe_event_info *gpe_event_info = NULL; | |
767 | struct acpi_gpe_event_info *this_event; | |
768 | struct acpi_gpe_register_info *this_register; | |
769 | acpi_native_uint i; | |
770 | acpi_native_uint j; | |
771 | acpi_status status; | |
772 | ||
773 | ||
774 | ACPI_FUNCTION_TRACE ("ev_create_gpe_info_blocks"); | |
775 | ||
776 | ||
777 | /* Allocate the GPE register information block */ | |
778 | ||
779 | gpe_register_info = ACPI_MEM_CALLOCATE ( | |
780 | (acpi_size) gpe_block->register_count * | |
781 | sizeof (struct acpi_gpe_register_info)); | |
782 | if (!gpe_register_info) { | |
783 | ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, | |
784 | "Could not allocate the gpe_register_info table\n")); | |
785 | return_ACPI_STATUS (AE_NO_MEMORY); | |
786 | } | |
787 | ||
788 | /* | |
789 | * Allocate the GPE event_info block. There are eight distinct GPEs | |
790 | * per register. Initialization to zeros is sufficient. | |
791 | */ | |
792 | gpe_event_info = ACPI_MEM_CALLOCATE ( | |
44f6c012 RM |
793 | ((acpi_size) gpe_block->register_count * |
794 | ACPI_GPE_REGISTER_WIDTH) * | |
1da177e4 LT |
795 | sizeof (struct acpi_gpe_event_info)); |
796 | if (!gpe_event_info) { | |
44f6c012 RM |
797 | ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, |
798 | "Could not allocate the gpe_event_info table\n")); | |
1da177e4 LT |
799 | status = AE_NO_MEMORY; |
800 | goto error_exit; | |
801 | } | |
802 | ||
803 | /* Save the new Info arrays in the GPE block */ | |
804 | ||
805 | gpe_block->register_info = gpe_register_info; | |
806 | gpe_block->event_info = gpe_event_info; | |
807 | ||
808 | /* | |
809 | * Initialize the GPE Register and Event structures. A goal of these | |
810 | * tables is to hide the fact that there are two separate GPE register sets | |
811 | * in a given gpe hardware block, the status registers occupy the first half, | |
812 | * and the enable registers occupy the second half. | |
813 | */ | |
814 | this_register = gpe_register_info; | |
815 | this_event = gpe_event_info; | |
816 | ||
817 | for (i = 0; i < gpe_block->register_count; i++) { | |
818 | /* Init the register_info for this GPE register (8 GPEs) */ | |
819 | ||
820 | this_register->base_gpe_number = (u8) (gpe_block->block_base_number + | |
821 | (i * ACPI_GPE_REGISTER_WIDTH)); | |
822 | ||
823 | ACPI_STORE_ADDRESS (this_register->status_address.address, | |
824 | (gpe_block->block_address.address | |
825 | + i)); | |
826 | ||
827 | ACPI_STORE_ADDRESS (this_register->enable_address.address, | |
828 | (gpe_block->block_address.address | |
829 | + i | |
830 | + gpe_block->register_count)); | |
831 | ||
832 | this_register->status_address.address_space_id = gpe_block->block_address.address_space_id; | |
833 | this_register->enable_address.address_space_id = gpe_block->block_address.address_space_id; | |
834 | this_register->status_address.register_bit_width = ACPI_GPE_REGISTER_WIDTH; | |
835 | this_register->enable_address.register_bit_width = ACPI_GPE_REGISTER_WIDTH; | |
836 | this_register->status_address.register_bit_offset = ACPI_GPE_REGISTER_WIDTH; | |
837 | this_register->enable_address.register_bit_offset = ACPI_GPE_REGISTER_WIDTH; | |
838 | ||
839 | /* Init the event_info for each GPE within this register */ | |
840 | ||
841 | for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) { | |
842 | this_event->register_bit = acpi_gbl_decode_to8bit[j]; | |
843 | this_event->register_info = this_register; | |
844 | this_event++; | |
845 | } | |
846 | ||
847 | /* | |
848 | * Clear the status/enable registers. Note that status registers | |
849 | * are cleared by writing a '1', while enable registers are cleared | |
850 | * by writing a '0'. | |
851 | */ | |
852 | status = acpi_hw_low_level_write (ACPI_GPE_REGISTER_WIDTH, 0x00, | |
853 | &this_register->enable_address); | |
854 | if (ACPI_FAILURE (status)) { | |
855 | goto error_exit; | |
856 | } | |
857 | ||
858 | status = acpi_hw_low_level_write (ACPI_GPE_REGISTER_WIDTH, 0xFF, | |
859 | &this_register->status_address); | |
860 | if (ACPI_FAILURE (status)) { | |
861 | goto error_exit; | |
862 | } | |
863 | ||
864 | this_register++; | |
865 | } | |
866 | ||
867 | return_ACPI_STATUS (AE_OK); | |
868 | ||
869 | ||
870 | error_exit: | |
871 | if (gpe_register_info) { | |
872 | ACPI_MEM_FREE (gpe_register_info); | |
873 | } | |
874 | if (gpe_event_info) { | |
875 | ACPI_MEM_FREE (gpe_event_info); | |
876 | } | |
877 | ||
878 | return_ACPI_STATUS (status); | |
879 | } | |
880 | ||
881 | ||
882 | /******************************************************************************* | |
883 | * | |
884 | * FUNCTION: acpi_ev_create_gpe_block | |
885 | * | |
886 | * PARAMETERS: gpe_device - Handle to the parent GPE block | |
887 | * gpe_block_address - Address and space_iD | |
888 | * register_count - Number of GPE register pairs in the block | |
889 | * gpe_block_base_number - Starting GPE number for the block | |
890 | * interrupt_level - H/W interrupt for the block | |
891 | * return_gpe_block - Where the new block descriptor is returned | |
892 | * | |
893 | * RETURN: Status | |
894 | * | |
895 | * DESCRIPTION: Create and Install a block of GPE registers | |
896 | * | |
897 | ******************************************************************************/ | |
898 | ||
899 | acpi_status | |
900 | acpi_ev_create_gpe_block ( | |
901 | struct acpi_namespace_node *gpe_device, | |
902 | struct acpi_generic_address *gpe_block_address, | |
903 | u32 register_count, | |
904 | u8 gpe_block_base_number, | |
905 | u32 interrupt_level, | |
906 | struct acpi_gpe_block_info **return_gpe_block) | |
907 | { | |
908 | struct acpi_gpe_block_info *gpe_block; | |
909 | struct acpi_gpe_event_info *gpe_event_info; | |
910 | acpi_native_uint i; | |
911 | acpi_native_uint j; | |
912 | u32 wake_gpe_count; | |
913 | u32 gpe_enabled_count; | |
914 | acpi_status status; | |
915 | struct acpi_gpe_walk_info gpe_info; | |
916 | ||
917 | ||
918 | ACPI_FUNCTION_TRACE ("ev_create_gpe_block"); | |
919 | ||
920 | ||
921 | if (!register_count) { | |
922 | return_ACPI_STATUS (AE_OK); | |
923 | } | |
924 | ||
925 | /* Allocate a new GPE block */ | |
926 | ||
927 | gpe_block = ACPI_MEM_CALLOCATE (sizeof (struct acpi_gpe_block_info)); | |
928 | if (!gpe_block) { | |
929 | return_ACPI_STATUS (AE_NO_MEMORY); | |
930 | } | |
931 | ||
932 | /* Initialize the new GPE block */ | |
933 | ||
934 | gpe_block->register_count = register_count; | |
935 | gpe_block->block_base_number = gpe_block_base_number; | |
936 | gpe_block->node = gpe_device; | |
937 | ||
44f6c012 RM |
938 | ACPI_MEMCPY (&gpe_block->block_address, gpe_block_address, |
939 | sizeof (struct acpi_generic_address)); | |
1da177e4 LT |
940 | |
941 | /* Create the register_info and event_info sub-structures */ | |
942 | ||
943 | status = acpi_ev_create_gpe_info_blocks (gpe_block); | |
944 | if (ACPI_FAILURE (status)) { | |
945 | ACPI_MEM_FREE (gpe_block); | |
946 | return_ACPI_STATUS (status); | |
947 | } | |
948 | ||
949 | /* Install the new block in the global list(s) */ | |
950 | ||
951 | status = acpi_ev_install_gpe_block (gpe_block, interrupt_level); | |
952 | if (ACPI_FAILURE (status)) { | |
953 | ACPI_MEM_FREE (gpe_block); | |
954 | return_ACPI_STATUS (status); | |
955 | } | |
956 | ||
957 | /* Find all GPE methods (_Lxx, _Exx) for this block */ | |
958 | ||
959 | status = acpi_ns_walk_namespace (ACPI_TYPE_METHOD, gpe_device, | |
960 | ACPI_UINT32_MAX, ACPI_NS_WALK_NO_UNLOCK, acpi_ev_save_method_info, | |
961 | gpe_block, NULL); | |
962 | ||
963 | /* | |
964 | * Runtime option: Should Wake GPEs be enabled at runtime? The default | |
965 | * is No, they should only be enabled just as the machine goes to sleep. | |
966 | */ | |
967 | if (acpi_gbl_leave_wake_gpes_disabled) { | |
968 | /* | |
969 | * Differentiate RUNTIME vs WAKE GPEs, via the _PRW control methods. | |
970 | * (Each GPE that has one or more _PRWs that reference it is by | |
971 | * definition a WAKE GPE and will not be enabled while the machine | |
972 | * is running.) | |
973 | */ | |
974 | gpe_info.gpe_block = gpe_block; | |
975 | gpe_info.gpe_device = gpe_device; | |
976 | ||
977 | status = acpi_ns_walk_namespace (ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, | |
978 | ACPI_UINT32_MAX, ACPI_NS_WALK_UNLOCK, acpi_ev_match_prw_and_gpe, | |
979 | &gpe_info, NULL); | |
980 | } | |
981 | ||
982 | /* | |
983 | * Enable all GPEs in this block that are 1) "runtime" or "run/wake" GPEs, | |
984 | * and 2) have a corresponding _Lxx or _Exx method. All other GPEs must | |
985 | * be enabled via the acpi_enable_gpe() external interface. | |
986 | */ | |
987 | wake_gpe_count = 0; | |
988 | gpe_enabled_count = 0; | |
989 | ||
990 | for (i = 0; i < gpe_block->register_count; i++) { | |
991 | for (j = 0; j < 8; j++) { | |
992 | /* Get the info block for this particular GPE */ | |
993 | ||
994 | gpe_event_info = &gpe_block->event_info[(i * ACPI_GPE_REGISTER_WIDTH) + j]; | |
995 | ||
996 | if (((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) == ACPI_GPE_DISPATCH_METHOD) && | |
997 | (gpe_event_info->flags & ACPI_GPE_TYPE_RUNTIME)) { | |
998 | gpe_enabled_count++; | |
999 | } | |
1000 | ||
1001 | if (gpe_event_info->flags & ACPI_GPE_TYPE_WAKE) { | |
1002 | wake_gpe_count++; | |
1003 | } | |
1004 | } | |
1005 | } | |
1006 | ||
1007 | /* Dump info about this GPE block */ | |
1008 | ||
1009 | ACPI_DEBUG_PRINT ((ACPI_DB_INIT, | |
1010 | "GPE %02X to %02X [%4.4s] %u regs on int 0x%X\n", | |
1011 | (u32) gpe_block->block_base_number, | |
1012 | (u32) (gpe_block->block_base_number + | |
1013 | ((gpe_block->register_count * ACPI_GPE_REGISTER_WIDTH) -1)), | |
1014 | gpe_device->name.ascii, | |
1015 | gpe_block->register_count, | |
1016 | interrupt_level)); | |
1017 | ||
1018 | /* Enable all valid GPEs found above */ | |
1019 | ||
1020 | status = acpi_hw_enable_runtime_gpe_block (NULL, gpe_block); | |
1021 | ||
1022 | ACPI_DEBUG_PRINT ((ACPI_DB_INIT, | |
1023 | "Found %u Wake, Enabled %u Runtime GPEs in this block\n", | |
1024 | wake_gpe_count, gpe_enabled_count)); | |
1025 | ||
1026 | /* Return the new block */ | |
1027 | ||
1028 | if (return_gpe_block) { | |
1029 | (*return_gpe_block) = gpe_block; | |
1030 | } | |
1031 | ||
1032 | return_ACPI_STATUS (AE_OK); | |
1033 | } | |
1034 | ||
1035 | ||
1036 | /******************************************************************************* | |
1037 | * | |
1038 | * FUNCTION: acpi_ev_gpe_initialize | |
1039 | * | |
1040 | * PARAMETERS: None | |
1041 | * | |
1042 | * RETURN: Status | |
1043 | * | |
1044 | * DESCRIPTION: Initialize the GPE data structures | |
1045 | * | |
1046 | ******************************************************************************/ | |
1047 | ||
1048 | acpi_status | |
1049 | acpi_ev_gpe_initialize ( | |
1050 | void) | |
1051 | { | |
1052 | u32 register_count0 = 0; | |
1053 | u32 register_count1 = 0; | |
1054 | u32 gpe_number_max = 0; | |
1055 | acpi_status status; | |
1056 | ||
1057 | ||
1058 | ACPI_FUNCTION_TRACE ("ev_gpe_initialize"); | |
1059 | ||
1060 | ||
1061 | status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE); | |
1062 | if (ACPI_FAILURE (status)) { | |
1063 | return_ACPI_STATUS (status); | |
1064 | } | |
1065 | ||
1066 | /* | |
1067 | * Initialize the GPE Block(s) defined in the FADT | |
1068 | * | |
1069 | * Why the GPE register block lengths are divided by 2: From the ACPI Spec, | |
1070 | * section "General-Purpose Event Registers", we have: | |
1071 | * | |
1072 | * "Each register block contains two registers of equal length | |
1073 | * GPEx_STS and GPEx_EN (where x is 0 or 1). The length of the | |
1074 | * GPE0_STS and GPE0_EN registers is equal to half the GPE0_LEN | |
1075 | * The length of the GPE1_STS and GPE1_EN registers is equal to | |
1076 | * half the GPE1_LEN. If a generic register block is not supported | |
1077 | * then its respective block pointer and block length values in the | |
1078 | * FADT table contain zeros. The GPE0_LEN and GPE1_LEN do not need | |
1079 | * to be the same size." | |
1080 | */ | |
1081 | ||
1082 | /* | |
1083 | * Determine the maximum GPE number for this machine. | |
1084 | * | |
1085 | * Note: both GPE0 and GPE1 are optional, and either can exist without | |
1086 | * the other. | |
1087 | * | |
1088 | * If EITHER the register length OR the block address are zero, then that | |
1089 | * particular block is not supported. | |
1090 | */ | |
1091 | if (acpi_gbl_FADT->gpe0_blk_len && | |
1092 | acpi_gbl_FADT->xgpe0_blk.address) { | |
1093 | /* GPE block 0 exists (has both length and address > 0) */ | |
1094 | ||
1095 | register_count0 = (u16) (acpi_gbl_FADT->gpe0_blk_len / 2); | |
1096 | ||
1097 | gpe_number_max = (register_count0 * ACPI_GPE_REGISTER_WIDTH) - 1; | |
1098 | ||
1099 | /* Install GPE Block 0 */ | |
1100 | ||
44f6c012 RM |
1101 | status = acpi_ev_create_gpe_block (acpi_gbl_fadt_gpe_device, |
1102 | &acpi_gbl_FADT->xgpe0_blk, register_count0, 0, | |
1103 | acpi_gbl_FADT->sci_int, &acpi_gbl_gpe_fadt_blocks[0]); | |
1da177e4 LT |
1104 | |
1105 | if (ACPI_FAILURE (status)) { | |
1106 | ACPI_REPORT_ERROR (( | |
1107 | "Could not create GPE Block 0, %s\n", | |
1108 | acpi_format_exception (status))); | |
1109 | } | |
1110 | } | |
1111 | ||
1112 | if (acpi_gbl_FADT->gpe1_blk_len && | |
1113 | acpi_gbl_FADT->xgpe1_blk.address) { | |
1114 | /* GPE block 1 exists (has both length and address > 0) */ | |
1115 | ||
1116 | register_count1 = (u16) (acpi_gbl_FADT->gpe1_blk_len / 2); | |
1117 | ||
1118 | /* Check for GPE0/GPE1 overlap (if both banks exist) */ | |
1119 | ||
1120 | if ((register_count0) && | |
1121 | (gpe_number_max >= acpi_gbl_FADT->gpe1_base)) { | |
1122 | ACPI_REPORT_ERROR (( | |
1123 | "GPE0 block (GPE 0 to %d) overlaps the GPE1 block (GPE %d to %d) - Ignoring GPE1\n", | |
1124 | gpe_number_max, acpi_gbl_FADT->gpe1_base, | |
1125 | acpi_gbl_FADT->gpe1_base + | |
1126 | ((register_count1 * ACPI_GPE_REGISTER_WIDTH) - 1))); | |
1127 | ||
1128 | /* Ignore GPE1 block by setting the register count to zero */ | |
1129 | ||
1130 | register_count1 = 0; | |
1131 | } | |
1132 | else { | |
1133 | /* Install GPE Block 1 */ | |
1134 | ||
44f6c012 RM |
1135 | status = acpi_ev_create_gpe_block (acpi_gbl_fadt_gpe_device, |
1136 | &acpi_gbl_FADT->xgpe1_blk, register_count1, | |
1137 | acpi_gbl_FADT->gpe1_base, | |
1da177e4 LT |
1138 | acpi_gbl_FADT->sci_int, &acpi_gbl_gpe_fadt_blocks[1]); |
1139 | ||
1140 | if (ACPI_FAILURE (status)) { | |
1141 | ACPI_REPORT_ERROR (( | |
1142 | "Could not create GPE Block 1, %s\n", | |
1143 | acpi_format_exception (status))); | |
1144 | } | |
1145 | ||
1146 | /* | |
1147 | * GPE0 and GPE1 do not have to be contiguous in the GPE number | |
1148 | * space. However, GPE0 always starts at GPE number zero. | |
1149 | */ | |
1150 | gpe_number_max = acpi_gbl_FADT->gpe1_base + | |
44f6c012 | 1151 | ((register_count1 * ACPI_GPE_REGISTER_WIDTH) - 1); |
1da177e4 LT |
1152 | } |
1153 | } | |
1154 | ||
1155 | /* Exit if there are no GPE registers */ | |
1156 | ||
1157 | if ((register_count0 + register_count1) == 0) { | |
1158 | /* GPEs are not required by ACPI, this is OK */ | |
1159 | ||
1160 | ACPI_DEBUG_PRINT ((ACPI_DB_INIT, | |
1161 | "There are no GPE blocks defined in the FADT\n")); | |
1162 | status = AE_OK; | |
1163 | goto cleanup; | |
1164 | } | |
1165 | ||
1166 | /* Check for Max GPE number out-of-range */ | |
1167 | ||
1168 | if (gpe_number_max > ACPI_GPE_MAX) { | |
1169 | ACPI_REPORT_ERROR (("Maximum GPE number from FADT is too large: 0x%X\n", | |
1170 | gpe_number_max)); | |
1171 | status = AE_BAD_VALUE; | |
1172 | goto cleanup; | |
1173 | } | |
1174 | ||
1175 | cleanup: | |
1176 | (void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE); | |
1177 | return_ACPI_STATUS (AE_OK); | |
1178 | } | |
1179 | ||
1180 |