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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: evgpeblk - GPE block creation and initialization. | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
75a44ce0 | 8 | * Copyright (C) 2000 - 2008, 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> | |
45 | #include <acpi/acevents.h> | |
46 | #include <acpi/acnamesp.h> | |
47 | ||
48 | #define _COMPONENT ACPI_EVENTS | |
4be44fcd | 49 | ACPI_MODULE_NAME("evgpeblk") |
1da177e4 | 50 | |
44f6c012 | 51 | /* Local prototypes */ |
44f6c012 | 52 | static acpi_status |
4be44fcd LB |
53 | acpi_ev_save_method_info(acpi_handle obj_handle, |
54 | u32 level, void *obj_desc, void **return_value); | |
44f6c012 RM |
55 | |
56 | static acpi_status | |
4be44fcd LB |
57 | acpi_ev_match_prw_and_gpe(acpi_handle obj_handle, |
58 | u32 level, void *info, void **return_value); | |
44f6c012 | 59 | |
4be44fcd LB |
60 | static struct acpi_gpe_xrupt_info *acpi_ev_get_gpe_xrupt_block(u32 |
61 | interrupt_number); | |
44f6c012 RM |
62 | |
63 | static acpi_status | |
4be44fcd | 64 | acpi_ev_delete_gpe_xrupt(struct acpi_gpe_xrupt_info *gpe_xrupt); |
44f6c012 RM |
65 | |
66 | static acpi_status | |
4be44fcd LB |
67 | acpi_ev_install_gpe_block(struct acpi_gpe_block_info *gpe_block, |
68 | u32 interrupt_number); | |
44f6c012 RM |
69 | |
70 | static acpi_status | |
4be44fcd | 71 | acpi_ev_create_gpe_info_blocks(struct acpi_gpe_block_info *gpe_block); |
1da177e4 LT |
72 | |
73 | /******************************************************************************* | |
74 | * | |
75 | * FUNCTION: acpi_ev_valid_gpe_event | |
76 | * | |
77 | * PARAMETERS: gpe_event_info - Info for this GPE | |
78 | * | |
79 | * RETURN: TRUE if the gpe_event is valid | |
80 | * | |
96db255c | 81 | * DESCRIPTION: Validate a GPE event. DO NOT CALL FROM INTERRUPT LEVEL. |
1da177e4 LT |
82 | * Should be called only when the GPE lists are semaphore locked |
83 | * and not subject to change. | |
84 | * | |
85 | ******************************************************************************/ | |
86 | ||
4be44fcd | 87 | u8 acpi_ev_valid_gpe_event(struct acpi_gpe_event_info *gpe_event_info) |
1da177e4 | 88 | { |
4be44fcd LB |
89 | struct acpi_gpe_xrupt_info *gpe_xrupt_block; |
90 | struct acpi_gpe_block_info *gpe_block; | |
1da177e4 | 91 | |
4be44fcd | 92 | ACPI_FUNCTION_ENTRY(); |
1da177e4 LT |
93 | |
94 | /* No need for spin lock since we are not changing any list elements */ | |
95 | ||
96 | /* Walk the GPE interrupt levels */ | |
97 | ||
98 | gpe_xrupt_block = acpi_gbl_gpe_xrupt_list_head; | |
99 | while (gpe_xrupt_block) { | |
100 | gpe_block = gpe_xrupt_block->gpe_block_list_head; | |
101 | ||
102 | /* Walk the GPE blocks on this interrupt level */ | |
103 | ||
104 | while (gpe_block) { | |
105 | if ((&gpe_block->event_info[0] <= gpe_event_info) && | |
4be44fcd LB |
106 | (&gpe_block-> |
107 | event_info[((acpi_size) gpe_block-> | |
108 | register_count) * 8] > | |
109 | gpe_event_info)) { | |
1da177e4 LT |
110 | return (TRUE); |
111 | } | |
112 | ||
113 | gpe_block = gpe_block->next; | |
114 | } | |
115 | ||
116 | gpe_xrupt_block = gpe_xrupt_block->next; | |
117 | } | |
118 | ||
119 | return (FALSE); | |
120 | } | |
121 | ||
1da177e4 LT |
122 | /******************************************************************************* |
123 | * | |
124 | * FUNCTION: acpi_ev_walk_gpe_list | |
125 | * | |
126 | * PARAMETERS: gpe_walk_callback - Routine called for each GPE block | |
e97d6bf1 | 127 | * Context - Value passed to callback |
1da177e4 LT |
128 | * |
129 | * RETURN: Status | |
130 | * | |
131 | * DESCRIPTION: Walk the GPE lists. | |
132 | * | |
133 | ******************************************************************************/ | |
134 | ||
e97d6bf1 BM |
135 | acpi_status |
136 | acpi_ev_walk_gpe_list(acpi_gpe_callback gpe_walk_callback, void *context) | |
1da177e4 | 137 | { |
4be44fcd LB |
138 | struct acpi_gpe_block_info *gpe_block; |
139 | struct acpi_gpe_xrupt_info *gpe_xrupt_info; | |
140 | acpi_status status = AE_OK; | |
b8e4d893 | 141 | acpi_cpu_flags flags; |
1da177e4 | 142 | |
b229cf92 | 143 | ACPI_FUNCTION_TRACE(ev_walk_gpe_list); |
1da177e4 | 144 | |
4be44fcd | 145 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
1da177e4 LT |
146 | |
147 | /* Walk the interrupt level descriptor list */ | |
148 | ||
149 | gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head; | |
150 | while (gpe_xrupt_info) { | |
52fc0b02 | 151 | |
1da177e4 LT |
152 | /* Walk all Gpe Blocks attached to this interrupt level */ |
153 | ||
154 | gpe_block = gpe_xrupt_info->gpe_block_list_head; | |
155 | while (gpe_block) { | |
52fc0b02 | 156 | |
1da177e4 LT |
157 | /* One callback per GPE block */ |
158 | ||
e97d6bf1 BM |
159 | status = |
160 | gpe_walk_callback(gpe_xrupt_info, gpe_block, | |
161 | context); | |
4be44fcd | 162 | if (ACPI_FAILURE(status)) { |
e97d6bf1 BM |
163 | if (status == AE_CTRL_END) { /* Callback abort */ |
164 | status = AE_OK; | |
165 | } | |
1da177e4 LT |
166 | goto unlock_and_exit; |
167 | } | |
168 | ||
169 | gpe_block = gpe_block->next; | |
170 | } | |
171 | ||
172 | gpe_xrupt_info = gpe_xrupt_info->next; | |
173 | } | |
174 | ||
4be44fcd LB |
175 | unlock_and_exit: |
176 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
177 | return_ACPI_STATUS(status); | |
1da177e4 LT |
178 | } |
179 | ||
44f6c012 | 180 | /******************************************************************************* |
1da177e4 LT |
181 | * |
182 | * FUNCTION: acpi_ev_delete_gpe_handlers | |
183 | * | |
184 | * PARAMETERS: gpe_xrupt_info - GPE Interrupt info | |
185 | * gpe_block - Gpe Block info | |
186 | * | |
187 | * RETURN: Status | |
188 | * | |
189 | * DESCRIPTION: Delete all Handler objects found in the GPE data structs. | |
190 | * Used only prior to termination. | |
191 | * | |
192 | ******************************************************************************/ | |
193 | ||
194 | acpi_status | |
4be44fcd | 195 | acpi_ev_delete_gpe_handlers(struct acpi_gpe_xrupt_info *gpe_xrupt_info, |
e97d6bf1 BM |
196 | struct acpi_gpe_block_info *gpe_block, |
197 | void *context) | |
1da177e4 | 198 | { |
4be44fcd | 199 | struct acpi_gpe_event_info *gpe_event_info; |
67a119f9 BM |
200 | u32 i; |
201 | u32 j; | |
1da177e4 | 202 | |
b229cf92 | 203 | ACPI_FUNCTION_TRACE(ev_delete_gpe_handlers); |
1da177e4 LT |
204 | |
205 | /* Examine each GPE Register within the block */ | |
206 | ||
207 | for (i = 0; i < gpe_block->register_count; i++) { | |
52fc0b02 | 208 | |
1da177e4 LT |
209 | /* Now look at the individual GPEs in this byte register */ |
210 | ||
211 | for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) { | |
4be44fcd LB |
212 | gpe_event_info = |
213 | &gpe_block-> | |
67a119f9 BM |
214 | event_info[((acpi_size) i * |
215 | ACPI_GPE_REGISTER_WIDTH) + 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; | |
261 | acpi_status status; | |
1da177e4 | 262 | |
b229cf92 | 263 | ACPI_FUNCTION_TRACE(ev_save_method_info); |
1da177e4 LT |
264 | |
265 | /* | |
266 | * _Lxx and _Exx GPE method support | |
267 | * | |
268 | * 1) Extract the name from the object and convert to a string | |
269 | */ | |
4be44fcd LB |
270 | ACPI_MOVE_32_TO_32(name, |
271 | &((struct acpi_namespace_node *)obj_handle)->name. | |
272 | integer); | |
1da177e4 LT |
273 | name[ACPI_NAME_SIZE] = 0; |
274 | ||
275 | /* | |
276 | * 2) Edge/Level determination is based on the 2nd character | |
277 | * of the method name | |
278 | * | |
96db255c | 279 | * NOTE: Default GPE type is RUNTIME. May be changed later to WAKE |
1da177e4 LT |
280 | * if a _PRW object is found that points to this GPE. |
281 | */ | |
282 | switch (name[1]) { | |
283 | case 'L': | |
284 | type = ACPI_GPE_LEVEL_TRIGGERED; | |
285 | break; | |
286 | ||
287 | case 'E': | |
288 | type = ACPI_GPE_EDGE_TRIGGERED; | |
289 | break; | |
290 | ||
291 | default: | |
292 | /* Unknown method type, just ignore it! */ | |
293 | ||
b229cf92 BM |
294 | ACPI_DEBUG_PRINT((ACPI_DB_LOAD, |
295 | "Ignoring unknown GPE method type: %s (name not of form _Lxx or _Exx)", | |
296 | name)); | |
4be44fcd | 297 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
298 | } |
299 | ||
300 | /* Convert the last two characters of the name to the GPE Number */ | |
301 | ||
4be44fcd | 302 | gpe_number = ACPI_STRTOUL(&name[2], NULL, 16); |
1da177e4 | 303 | if (gpe_number == ACPI_UINT32_MAX) { |
52fc0b02 | 304 | |
1da177e4 LT |
305 | /* Conversion failed; invalid method, just ignore it */ |
306 | ||
b229cf92 BM |
307 | ACPI_DEBUG_PRINT((ACPI_DB_LOAD, |
308 | "Could not extract GPE number from name: %s (name is not of form _Lxx or _Exx)", | |
309 | name)); | |
4be44fcd | 310 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
311 | } |
312 | ||
313 | /* Ensure that we have a valid GPE number for this GPE block */ | |
314 | ||
315 | if ((gpe_number < gpe_block->block_base_number) || | |
4be44fcd LB |
316 | (gpe_number >= |
317 | (gpe_block->block_base_number + | |
318 | (gpe_block->register_count * 8)))) { | |
1da177e4 | 319 | /* |
9f15fc66 BM |
320 | * Not valid for this GPE block, just ignore it. However, it may be |
321 | * valid for a different GPE block, since GPE0 and GPE1 methods both | |
322 | * appear under \_GPE. | |
1da177e4 | 323 | */ |
4be44fcd | 324 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
325 | } |
326 | ||
327 | /* | |
9f15fc66 BM |
328 | * Now we can add this information to the gpe_event_info block for use |
329 | * during dispatch of this GPE. Default type is RUNTIME, although this may | |
330 | * change when the _PRW methods are executed later. | |
1da177e4 | 331 | */ |
4be44fcd LB |
332 | gpe_event_info = |
333 | &gpe_block->event_info[gpe_number - gpe_block->block_base_number]; | |
1da177e4 | 334 | |
96db255c BM |
335 | gpe_event_info->flags = (u8) |
336 | (type | ACPI_GPE_DISPATCH_METHOD | ACPI_GPE_TYPE_RUNTIME); | |
1da177e4 | 337 | |
4be44fcd LB |
338 | gpe_event_info->dispatch.method_node = |
339 | (struct acpi_namespace_node *)obj_handle; | |
1da177e4 LT |
340 | |
341 | /* Update enable mask, but don't enable the HW GPE as of yet */ | |
342 | ||
4be44fcd | 343 | status = acpi_ev_enable_gpe(gpe_event_info, FALSE); |
1da177e4 | 344 | |
4be44fcd LB |
345 | ACPI_DEBUG_PRINT((ACPI_DB_LOAD, |
346 | "Registered GPE method %s as GPE number 0x%.2X\n", | |
347 | name, gpe_number)); | |
348 | return_ACPI_STATUS(status); | |
1da177e4 LT |
349 | } |
350 | ||
1da177e4 LT |
351 | /******************************************************************************* |
352 | * | |
353 | * FUNCTION: acpi_ev_match_prw_and_gpe | |
354 | * | |
355 | * PARAMETERS: Callback from walk_namespace | |
356 | * | |
96db255c | 357 | * RETURN: Status. NOTE: We ignore errors so that the _PRW walk is |
1da177e4 LT |
358 | * not aborted on a single _PRW failure. |
359 | * | |
360 | * DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a | |
96db255c | 361 | * Device. Run the _PRW method. If present, extract the GPE |
1da177e4 LT |
362 | * number and mark the GPE as a WAKE GPE. |
363 | * | |
364 | ******************************************************************************/ | |
365 | ||
366 | static acpi_status | |
4be44fcd LB |
367 | acpi_ev_match_prw_and_gpe(acpi_handle obj_handle, |
368 | u32 level, void *info, void **return_value) | |
1da177e4 | 369 | { |
4be44fcd LB |
370 | struct acpi_gpe_walk_info *gpe_info = (void *)info; |
371 | struct acpi_namespace_node *gpe_device; | |
372 | struct acpi_gpe_block_info *gpe_block; | |
373 | struct acpi_namespace_node *target_gpe_device; | |
374 | struct acpi_gpe_event_info *gpe_event_info; | |
375 | union acpi_operand_object *pkg_desc; | |
376 | union acpi_operand_object *obj_desc; | |
377 | u32 gpe_number; | |
378 | acpi_status status; | |
379 | ||
b229cf92 | 380 | ACPI_FUNCTION_TRACE(ev_match_prw_and_gpe); |
1da177e4 LT |
381 | |
382 | /* Check for a _PRW method under this device */ | |
383 | ||
4be44fcd LB |
384 | status = acpi_ut_evaluate_object(obj_handle, METHOD_NAME__PRW, |
385 | ACPI_BTYPE_PACKAGE, &pkg_desc); | |
386 | if (ACPI_FAILURE(status)) { | |
52fc0b02 | 387 | |
1da177e4 LT |
388 | /* Ignore all errors from _PRW, we don't want to abort the subsystem */ |
389 | ||
4be44fcd | 390 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
391 | } |
392 | ||
393 | /* The returned _PRW package must have at least two elements */ | |
394 | ||
395 | if (pkg_desc->package.count < 2) { | |
396 | goto cleanup; | |
397 | } | |
398 | ||
399 | /* Extract pointers from the input context */ | |
400 | ||
401 | gpe_device = gpe_info->gpe_device; | |
402 | gpe_block = gpe_info->gpe_block; | |
403 | ||
404 | /* | |
9f15fc66 BM |
405 | * The _PRW object must return a package, we are only interested in the |
406 | * first element | |
1da177e4 LT |
407 | */ |
408 | obj_desc = pkg_desc->package.elements[0]; | |
409 | ||
4be44fcd | 410 | if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_INTEGER) { |
52fc0b02 | 411 | |
1da177e4 LT |
412 | /* Use FADT-defined GPE device (from definition of _PRW) */ |
413 | ||
414 | target_gpe_device = acpi_gbl_fadt_gpe_device; | |
415 | ||
416 | /* Integer is the GPE number in the FADT described GPE blocks */ | |
417 | ||
418 | gpe_number = (u32) obj_desc->integer.value; | |
4be44fcd | 419 | } else if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_PACKAGE) { |
52fc0b02 | 420 | |
1da177e4 LT |
421 | /* Package contains a GPE reference and GPE number within a GPE block */ |
422 | ||
423 | if ((obj_desc->package.count < 2) || | |
4be44fcd LB |
424 | (ACPI_GET_OBJECT_TYPE(obj_desc->package.elements[0]) != |
425 | ACPI_TYPE_LOCAL_REFERENCE) | |
426 | || (ACPI_GET_OBJECT_TYPE(obj_desc->package.elements[1]) != | |
427 | ACPI_TYPE_INTEGER)) { | |
1da177e4 LT |
428 | goto cleanup; |
429 | } | |
430 | ||
431 | /* Get GPE block reference and decode */ | |
432 | ||
4be44fcd LB |
433 | target_gpe_device = |
434 | obj_desc->package.elements[0]->reference.node; | |
1da177e4 | 435 | gpe_number = (u32) obj_desc->package.elements[1]->integer.value; |
4be44fcd | 436 | } else { |
1da177e4 LT |
437 | /* Unknown type, just ignore it */ |
438 | ||
439 | goto cleanup; | |
440 | } | |
441 | ||
442 | /* | |
443 | * Is this GPE within this block? | |
444 | * | |
9f15fc66 | 445 | * TRUE if and only if these conditions are true: |
1da177e4 LT |
446 | * 1) The GPE devices match. |
447 | * 2) The GPE index(number) is within the range of the Gpe Block | |
448 | * associated with the GPE device. | |
449 | */ | |
450 | if ((gpe_device == target_gpe_device) && | |
4be44fcd LB |
451 | (gpe_number >= gpe_block->block_base_number) && |
452 | (gpe_number < | |
453 | gpe_block->block_base_number + (gpe_block->register_count * 8))) { | |
454 | gpe_event_info = | |
455 | &gpe_block->event_info[gpe_number - | |
456 | gpe_block->block_base_number]; | |
1da177e4 LT |
457 | |
458 | /* Mark GPE for WAKE-ONLY but WAKE_DISABLED */ | |
459 | ||
4be44fcd LB |
460 | gpe_event_info->flags &= |
461 | ~(ACPI_GPE_WAKE_ENABLED | ACPI_GPE_RUN_ENABLED); | |
96db255c | 462 | |
4be44fcd LB |
463 | status = |
464 | acpi_ev_set_gpe_type(gpe_event_info, ACPI_GPE_TYPE_WAKE); | |
465 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
466 | goto cleanup; |
467 | } | |
9f15fc66 | 468 | |
4be44fcd LB |
469 | status = |
470 | acpi_ev_update_gpe_enable_masks(gpe_event_info, | |
471 | ACPI_GPE_DISABLE); | |
1da177e4 LT |
472 | } |
473 | ||
4be44fcd LB |
474 | cleanup: |
475 | acpi_ut_remove_reference(pkg_desc); | |
476 | return_ACPI_STATUS(AE_OK); | |
1da177e4 LT |
477 | } |
478 | ||
1da177e4 LT |
479 | /******************************************************************************* |
480 | * | |
481 | * FUNCTION: acpi_ev_get_gpe_xrupt_block | |
482 | * | |
6f42ccf2 | 483 | * PARAMETERS: interrupt_number - Interrupt for a GPE block |
1da177e4 LT |
484 | * |
485 | * RETURN: A GPE interrupt block | |
486 | * | |
96db255c | 487 | * DESCRIPTION: Get or Create a GPE interrupt block. There is one interrupt |
9f15fc66 BM |
488 | * block per unique interrupt level used for GPEs. Should be |
489 | * called only when the GPE lists are semaphore locked and not | |
490 | * subject to change. | |
1da177e4 LT |
491 | * |
492 | ******************************************************************************/ | |
493 | ||
4be44fcd LB |
494 | static struct acpi_gpe_xrupt_info *acpi_ev_get_gpe_xrupt_block(u32 |
495 | interrupt_number) | |
1da177e4 | 496 | { |
4be44fcd LB |
497 | struct acpi_gpe_xrupt_info *next_gpe_xrupt; |
498 | struct acpi_gpe_xrupt_info *gpe_xrupt; | |
499 | acpi_status status; | |
b8e4d893 | 500 | acpi_cpu_flags flags; |
1da177e4 | 501 | |
b229cf92 | 502 | ACPI_FUNCTION_TRACE(ev_get_gpe_xrupt_block); |
1da177e4 | 503 | |
44f6c012 | 504 | /* No need for lock since we are not changing any list elements here */ |
1da177e4 LT |
505 | |
506 | next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head; | |
507 | while (next_gpe_xrupt) { | |
6f42ccf2 | 508 | if (next_gpe_xrupt->interrupt_number == interrupt_number) { |
4be44fcd | 509 | return_PTR(next_gpe_xrupt); |
1da177e4 LT |
510 | } |
511 | ||
512 | next_gpe_xrupt = next_gpe_xrupt->next; | |
513 | } | |
514 | ||
515 | /* Not found, must allocate a new xrupt descriptor */ | |
516 | ||
8313524a | 517 | gpe_xrupt = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_xrupt_info)); |
1da177e4 | 518 | if (!gpe_xrupt) { |
4be44fcd | 519 | return_PTR(NULL); |
1da177e4 LT |
520 | } |
521 | ||
6f42ccf2 | 522 | gpe_xrupt->interrupt_number = interrupt_number; |
1da177e4 LT |
523 | |
524 | /* Install new interrupt descriptor with spin lock */ | |
525 | ||
4be44fcd | 526 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
1da177e4 LT |
527 | if (acpi_gbl_gpe_xrupt_list_head) { |
528 | next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head; | |
529 | while (next_gpe_xrupt->next) { | |
530 | next_gpe_xrupt = next_gpe_xrupt->next; | |
531 | } | |
532 | ||
533 | next_gpe_xrupt->next = gpe_xrupt; | |
534 | gpe_xrupt->previous = next_gpe_xrupt; | |
4be44fcd | 535 | } else { |
1da177e4 LT |
536 | acpi_gbl_gpe_xrupt_list_head = gpe_xrupt; |
537 | } | |
4be44fcd | 538 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
1da177e4 LT |
539 | |
540 | /* Install new interrupt handler if not SCI_INT */ | |
541 | ||
f3d2e786 | 542 | if (interrupt_number != acpi_gbl_FADT.sci_interrupt) { |
4be44fcd LB |
543 | status = acpi_os_install_interrupt_handler(interrupt_number, |
544 | acpi_ev_gpe_xrupt_handler, | |
545 | gpe_xrupt); | |
546 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
547 | ACPI_ERROR((AE_INFO, |
548 | "Could not install GPE interrupt handler at level 0x%X", | |
549 | interrupt_number)); | |
4be44fcd | 550 | return_PTR(NULL); |
1da177e4 LT |
551 | } |
552 | } | |
553 | ||
4be44fcd | 554 | return_PTR(gpe_xrupt); |
1da177e4 LT |
555 | } |
556 | ||
1da177e4 LT |
557 | /******************************************************************************* |
558 | * | |
559 | * FUNCTION: acpi_ev_delete_gpe_xrupt | |
560 | * | |
561 | * PARAMETERS: gpe_xrupt - A GPE interrupt info block | |
562 | * | |
563 | * RETURN: Status | |
564 | * | |
565 | * DESCRIPTION: Remove and free a gpe_xrupt block. Remove an associated | |
566 | * interrupt handler if not the SCI interrupt. | |
567 | * | |
568 | ******************************************************************************/ | |
569 | ||
570 | static acpi_status | |
4be44fcd | 571 | acpi_ev_delete_gpe_xrupt(struct acpi_gpe_xrupt_info *gpe_xrupt) |
1da177e4 | 572 | { |
4be44fcd | 573 | acpi_status status; |
b8e4d893 | 574 | acpi_cpu_flags flags; |
1da177e4 | 575 | |
b229cf92 | 576 | ACPI_FUNCTION_TRACE(ev_delete_gpe_xrupt); |
1da177e4 LT |
577 | |
578 | /* We never want to remove the SCI interrupt handler */ | |
579 | ||
f3d2e786 | 580 | if (gpe_xrupt->interrupt_number == acpi_gbl_FADT.sci_interrupt) { |
1da177e4 | 581 | gpe_xrupt->gpe_block_list_head = NULL; |
4be44fcd | 582 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
583 | } |
584 | ||
585 | /* Disable this interrupt */ | |
586 | ||
96db255c BM |
587 | status = |
588 | acpi_os_remove_interrupt_handler(gpe_xrupt->interrupt_number, | |
589 | acpi_ev_gpe_xrupt_handler); | |
4be44fcd LB |
590 | if (ACPI_FAILURE(status)) { |
591 | return_ACPI_STATUS(status); | |
1da177e4 LT |
592 | } |
593 | ||
594 | /* Unlink the interrupt block with lock */ | |
595 | ||
4be44fcd | 596 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
1da177e4 LT |
597 | if (gpe_xrupt->previous) { |
598 | gpe_xrupt->previous->next = gpe_xrupt->next; | |
e0b91050 BM |
599 | } else { |
600 | /* No previous, update list head */ | |
601 | ||
602 | acpi_gbl_gpe_xrupt_list_head = gpe_xrupt->next; | |
1da177e4 LT |
603 | } |
604 | ||
605 | if (gpe_xrupt->next) { | |
606 | gpe_xrupt->next->previous = gpe_xrupt->previous; | |
607 | } | |
4be44fcd | 608 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
1da177e4 LT |
609 | |
610 | /* Free the block */ | |
611 | ||
8313524a | 612 | ACPI_FREE(gpe_xrupt); |
4be44fcd | 613 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
614 | } |
615 | ||
1da177e4 LT |
616 | /******************************************************************************* |
617 | * | |
618 | * FUNCTION: acpi_ev_install_gpe_block | |
619 | * | |
9f15fc66 BM |
620 | * PARAMETERS: gpe_block - New GPE block |
621 | * interrupt_number - Xrupt to be associated with this | |
622 | * GPE block | |
1da177e4 LT |
623 | * |
624 | * RETURN: Status | |
625 | * | |
626 | * DESCRIPTION: Install new GPE block with mutex support | |
627 | * | |
628 | ******************************************************************************/ | |
629 | ||
630 | static acpi_status | |
4be44fcd LB |
631 | acpi_ev_install_gpe_block(struct acpi_gpe_block_info *gpe_block, |
632 | u32 interrupt_number) | |
1da177e4 | 633 | { |
4be44fcd LB |
634 | struct acpi_gpe_block_info *next_gpe_block; |
635 | struct acpi_gpe_xrupt_info *gpe_xrupt_block; | |
636 | acpi_status status; | |
b8e4d893 | 637 | acpi_cpu_flags flags; |
1da177e4 | 638 | |
b229cf92 | 639 | ACPI_FUNCTION_TRACE(ev_install_gpe_block); |
1da177e4 | 640 | |
4be44fcd LB |
641 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
642 | if (ACPI_FAILURE(status)) { | |
643 | return_ACPI_STATUS(status); | |
1da177e4 LT |
644 | } |
645 | ||
4be44fcd | 646 | gpe_xrupt_block = acpi_ev_get_gpe_xrupt_block(interrupt_number); |
1da177e4 LT |
647 | if (!gpe_xrupt_block) { |
648 | status = AE_NO_MEMORY; | |
649 | goto unlock_and_exit; | |
650 | } | |
651 | ||
44f6c012 | 652 | /* Install the new block at the end of the list with lock */ |
1da177e4 | 653 | |
4be44fcd | 654 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
1da177e4 LT |
655 | if (gpe_xrupt_block->gpe_block_list_head) { |
656 | next_gpe_block = gpe_xrupt_block->gpe_block_list_head; | |
657 | while (next_gpe_block->next) { | |
658 | next_gpe_block = next_gpe_block->next; | |
659 | } | |
660 | ||
661 | next_gpe_block->next = gpe_block; | |
662 | gpe_block->previous = next_gpe_block; | |
4be44fcd | 663 | } else { |
1da177e4 LT |
664 | gpe_xrupt_block->gpe_block_list_head = gpe_block; |
665 | } | |
666 | ||
667 | gpe_block->xrupt_block = gpe_xrupt_block; | |
4be44fcd | 668 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
1da177e4 | 669 | |
4be44fcd LB |
670 | unlock_and_exit: |
671 | status = acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
672 | return_ACPI_STATUS(status); | |
1da177e4 LT |
673 | } |
674 | ||
1da177e4 LT |
675 | /******************************************************************************* |
676 | * | |
677 | * FUNCTION: acpi_ev_delete_gpe_block | |
678 | * | |
9f15fc66 | 679 | * PARAMETERS: gpe_block - Existing GPE block |
1da177e4 LT |
680 | * |
681 | * RETURN: Status | |
682 | * | |
683 | * DESCRIPTION: Remove a GPE block | |
684 | * | |
685 | ******************************************************************************/ | |
686 | ||
4be44fcd | 687 | acpi_status acpi_ev_delete_gpe_block(struct acpi_gpe_block_info *gpe_block) |
1da177e4 | 688 | { |
4be44fcd | 689 | acpi_status status; |
b8e4d893 | 690 | acpi_cpu_flags flags; |
1da177e4 | 691 | |
b229cf92 | 692 | ACPI_FUNCTION_TRACE(ev_install_gpe_block); |
1da177e4 | 693 | |
4be44fcd LB |
694 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
695 | if (ACPI_FAILURE(status)) { | |
696 | return_ACPI_STATUS(status); | |
1da177e4 LT |
697 | } |
698 | ||
699 | /* Disable all GPEs in this block */ | |
700 | ||
e97d6bf1 BM |
701 | status = |
702 | acpi_hw_disable_gpe_block(gpe_block->xrupt_block, gpe_block, NULL); | |
1da177e4 LT |
703 | |
704 | if (!gpe_block->previous && !gpe_block->next) { | |
52fc0b02 | 705 | |
1da177e4 LT |
706 | /* This is the last gpe_block on this interrupt */ |
707 | ||
4be44fcd LB |
708 | status = acpi_ev_delete_gpe_xrupt(gpe_block->xrupt_block); |
709 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
710 | goto unlock_and_exit; |
711 | } | |
4be44fcd | 712 | } else { |
1da177e4 LT |
713 | /* Remove the block on this interrupt with lock */ |
714 | ||
4be44fcd | 715 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
1da177e4 LT |
716 | if (gpe_block->previous) { |
717 | gpe_block->previous->next = gpe_block->next; | |
4be44fcd LB |
718 | } else { |
719 | gpe_block->xrupt_block->gpe_block_list_head = | |
720 | gpe_block->next; | |
1da177e4 LT |
721 | } |
722 | ||
723 | if (gpe_block->next) { | |
724 | gpe_block->next->previous = gpe_block->previous; | |
725 | } | |
4be44fcd | 726 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
1da177e4 LT |
727 | } |
728 | ||
e97d6bf1 BM |
729 | acpi_current_gpe_count -= |
730 | gpe_block->register_count * ACPI_GPE_REGISTER_WIDTH; | |
731 | ||
1da177e4 LT |
732 | /* Free the gpe_block */ |
733 | ||
8313524a BM |
734 | ACPI_FREE(gpe_block->register_info); |
735 | ACPI_FREE(gpe_block->event_info); | |
736 | ACPI_FREE(gpe_block); | |
1da177e4 | 737 | |
4be44fcd LB |
738 | unlock_and_exit: |
739 | status = acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
740 | return_ACPI_STATUS(status); | |
1da177e4 LT |
741 | } |
742 | ||
1da177e4 LT |
743 | /******************************************************************************* |
744 | * | |
745 | * FUNCTION: acpi_ev_create_gpe_info_blocks | |
746 | * | |
747 | * PARAMETERS: gpe_block - New GPE block | |
748 | * | |
749 | * RETURN: Status | |
750 | * | |
751 | * DESCRIPTION: Create the register_info and event_info blocks for this GPE block | |
752 | * | |
753 | ******************************************************************************/ | |
754 | ||
755 | static acpi_status | |
4be44fcd | 756 | acpi_ev_create_gpe_info_blocks(struct acpi_gpe_block_info *gpe_block) |
1da177e4 | 757 | { |
4be44fcd LB |
758 | struct acpi_gpe_register_info *gpe_register_info = NULL; |
759 | struct acpi_gpe_event_info *gpe_event_info = NULL; | |
760 | struct acpi_gpe_event_info *this_event; | |
761 | struct acpi_gpe_register_info *this_register; | |
67a119f9 BM |
762 | u32 i; |
763 | u32 j; | |
4be44fcd | 764 | acpi_status status; |
1da177e4 | 765 | |
b229cf92 | 766 | ACPI_FUNCTION_TRACE(ev_create_gpe_info_blocks); |
1da177e4 LT |
767 | |
768 | /* Allocate the GPE register information block */ | |
769 | ||
8313524a BM |
770 | gpe_register_info = ACPI_ALLOCATE_ZEROED((acpi_size) gpe_block-> |
771 | register_count * | |
772 | sizeof(struct | |
773 | acpi_gpe_register_info)); | |
1da177e4 | 774 | if (!gpe_register_info) { |
b8e4d893 | 775 | ACPI_ERROR((AE_INFO, |
b229cf92 | 776 | "Could not allocate the GpeRegisterInfo table")); |
4be44fcd | 777 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
778 | } |
779 | ||
780 | /* | |
781 | * Allocate the GPE event_info block. There are eight distinct GPEs | |
96db255c | 782 | * per register. Initialization to zeros is sufficient. |
1da177e4 | 783 | */ |
8313524a BM |
784 | gpe_event_info = ACPI_ALLOCATE_ZEROED(((acpi_size) gpe_block-> |
785 | register_count * | |
786 | ACPI_GPE_REGISTER_WIDTH) * | |
787 | sizeof(struct | |
788 | acpi_gpe_event_info)); | |
1da177e4 | 789 | if (!gpe_event_info) { |
b8e4d893 | 790 | ACPI_ERROR((AE_INFO, |
b229cf92 | 791 | "Could not allocate the GpeEventInfo table")); |
1da177e4 LT |
792 | status = AE_NO_MEMORY; |
793 | goto error_exit; | |
794 | } | |
795 | ||
796 | /* Save the new Info arrays in the GPE block */ | |
797 | ||
798 | gpe_block->register_info = gpe_register_info; | |
4be44fcd | 799 | gpe_block->event_info = gpe_event_info; |
1da177e4 LT |
800 | |
801 | /* | |
96db255c | 802 | * Initialize the GPE Register and Event structures. A goal of these |
9f15fc66 BM |
803 | * tables is to hide the fact that there are two separate GPE register |
804 | * sets in a given GPE hardware block, the status registers occupy the | |
805 | * first half, and the enable registers occupy the second half. | |
1da177e4 LT |
806 | */ |
807 | this_register = gpe_register_info; | |
4be44fcd | 808 | this_event = gpe_event_info; |
1da177e4 LT |
809 | |
810 | for (i = 0; i < gpe_block->register_count; i++) { | |
52fc0b02 | 811 | |
1da177e4 LT |
812 | /* Init the register_info for this GPE register (8 GPEs) */ |
813 | ||
4be44fcd LB |
814 | this_register->base_gpe_number = |
815 | (u8) (gpe_block->block_base_number + | |
816 | (i * ACPI_GPE_REGISTER_WIDTH)); | |
817 | ||
59fa8505 BM |
818 | this_register->status_address.address = |
819 | gpe_block->block_address.address + i; | |
4be44fcd | 820 | |
59fa8505 BM |
821 | this_register->enable_address.address = |
822 | gpe_block->block_address.address + i + | |
823 | gpe_block->register_count; | |
4be44fcd | 824 | |
f3d2e786 BM |
825 | this_register->status_address.space_id = |
826 | gpe_block->block_address.space_id; | |
827 | this_register->enable_address.space_id = | |
828 | gpe_block->block_address.space_id; | |
829 | this_register->status_address.bit_width = | |
4be44fcd | 830 | ACPI_GPE_REGISTER_WIDTH; |
f3d2e786 | 831 | this_register->enable_address.bit_width = |
4be44fcd | 832 | ACPI_GPE_REGISTER_WIDTH; |
f3d2e786 | 833 | this_register->status_address.bit_offset = |
4be44fcd | 834 | ACPI_GPE_REGISTER_WIDTH; |
f3d2e786 | 835 | this_register->enable_address.bit_offset = |
4be44fcd | 836 | ACPI_GPE_REGISTER_WIDTH; |
1da177e4 LT |
837 | |
838 | /* Init the event_info for each GPE within this register */ | |
839 | ||
840 | for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) { | |
69874165 AS |
841 | this_event->gpe_number = |
842 | (u8) (this_register->base_gpe_number + j); | |
1da177e4 LT |
843 | this_event->register_info = this_register; |
844 | this_event++; | |
845 | } | |
846 | ||
96db255c BM |
847 | /* Disable all GPEs within this register */ |
848 | ||
4be44fcd LB |
849 | status = acpi_hw_low_level_write(ACPI_GPE_REGISTER_WIDTH, 0x00, |
850 | &this_register-> | |
851 | enable_address); | |
852 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
853 | goto error_exit; |
854 | } | |
855 | ||
96db255c BM |
856 | /* Clear any pending GPE events within this register */ |
857 | ||
4be44fcd LB |
858 | status = acpi_hw_low_level_write(ACPI_GPE_REGISTER_WIDTH, 0xFF, |
859 | &this_register-> | |
860 | status_address); | |
861 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
862 | goto error_exit; |
863 | } | |
864 | ||
865 | this_register++; | |
866 | } | |
867 | ||
4be44fcd | 868 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 869 | |
4be44fcd | 870 | error_exit: |
1da177e4 | 871 | if (gpe_register_info) { |
8313524a | 872 | ACPI_FREE(gpe_register_info); |
1da177e4 LT |
873 | } |
874 | if (gpe_event_info) { | |
8313524a | 875 | ACPI_FREE(gpe_event_info); |
1da177e4 LT |
876 | } |
877 | ||
4be44fcd | 878 | return_ACPI_STATUS(status); |
1da177e4 LT |
879 | } |
880 | ||
1da177e4 LT |
881 | /******************************************************************************* |
882 | * | |
883 | * FUNCTION: acpi_ev_create_gpe_block | |
884 | * | |
885 | * PARAMETERS: gpe_device - Handle to the parent GPE block | |
886 | * gpe_block_address - Address and space_iD | |
887 | * register_count - Number of GPE register pairs in the block | |
888 | * gpe_block_base_number - Starting GPE number for the block | |
6f42ccf2 | 889 | * interrupt_number - H/W interrupt for the block |
1da177e4 LT |
890 | * return_gpe_block - Where the new block descriptor is returned |
891 | * | |
892 | * RETURN: Status | |
893 | * | |
96db255c BM |
894 | * DESCRIPTION: Create and Install a block of GPE registers. All GPEs within |
895 | * the block are disabled at exit. | |
896 | * Note: Assumes namespace is locked. | |
1da177e4 LT |
897 | * |
898 | ******************************************************************************/ | |
899 | ||
900 | acpi_status | |
4be44fcd LB |
901 | acpi_ev_create_gpe_block(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_number, | |
906 | struct acpi_gpe_block_info **return_gpe_block) | |
1da177e4 | 907 | { |
4be44fcd | 908 | acpi_status status; |
96db255c | 909 | struct acpi_gpe_block_info *gpe_block; |
1da177e4 | 910 | |
b229cf92 | 911 | ACPI_FUNCTION_TRACE(ev_create_gpe_block); |
1da177e4 LT |
912 | |
913 | if (!register_count) { | |
4be44fcd | 914 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
915 | } |
916 | ||
917 | /* Allocate a new GPE block */ | |
918 | ||
8313524a | 919 | gpe_block = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_block_info)); |
1da177e4 | 920 | if (!gpe_block) { |
4be44fcd | 921 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
922 | } |
923 | ||
924 | /* Initialize the new GPE block */ | |
925 | ||
96db255c | 926 | gpe_block->node = gpe_device; |
1da177e4 LT |
927 | gpe_block->register_count = register_count; |
928 | gpe_block->block_base_number = gpe_block_base_number; | |
1da177e4 | 929 | |
4be44fcd LB |
930 | ACPI_MEMCPY(&gpe_block->block_address, gpe_block_address, |
931 | sizeof(struct acpi_generic_address)); | |
1da177e4 | 932 | |
96db255c BM |
933 | /* |
934 | * Create the register_info and event_info sub-structures | |
935 | * Note: disables and clears all GPEs in the block | |
936 | */ | |
4be44fcd LB |
937 | status = acpi_ev_create_gpe_info_blocks(gpe_block); |
938 | if (ACPI_FAILURE(status)) { | |
8313524a | 939 | ACPI_FREE(gpe_block); |
4be44fcd | 940 | return_ACPI_STATUS(status); |
1da177e4 LT |
941 | } |
942 | ||
96db255c | 943 | /* Install the new block in the global lists */ |
1da177e4 | 944 | |
4be44fcd LB |
945 | status = acpi_ev_install_gpe_block(gpe_block, interrupt_number); |
946 | if (ACPI_FAILURE(status)) { | |
8313524a | 947 | ACPI_FREE(gpe_block); |
4be44fcd | 948 | return_ACPI_STATUS(status); |
1da177e4 LT |
949 | } |
950 | ||
951 | /* Find all GPE methods (_Lxx, _Exx) for this block */ | |
952 | ||
4be44fcd LB |
953 | status = acpi_ns_walk_namespace(ACPI_TYPE_METHOD, gpe_device, |
954 | ACPI_UINT32_MAX, ACPI_NS_WALK_NO_UNLOCK, | |
955 | acpi_ev_save_method_info, gpe_block, | |
956 | NULL); | |
1da177e4 | 957 | |
96db255c BM |
958 | /* Return the new block */ |
959 | ||
960 | if (return_gpe_block) { | |
961 | (*return_gpe_block) = gpe_block; | |
962 | } | |
963 | ||
964 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, | |
965 | "GPE %02X to %02X [%4.4s] %u regs on int 0x%X\n", | |
966 | (u32) gpe_block->block_base_number, | |
967 | (u32) (gpe_block->block_base_number + | |
968 | ((gpe_block->register_count * | |
969 | ACPI_GPE_REGISTER_WIDTH) - 1)), | |
970 | gpe_device->name.ascii, gpe_block->register_count, | |
971 | interrupt_number)); | |
972 | ||
e97d6bf1 BM |
973 | /* Update global count of currently available GPEs */ |
974 | ||
975 | acpi_current_gpe_count += register_count * ACPI_GPE_REGISTER_WIDTH; | |
96db255c BM |
976 | return_ACPI_STATUS(AE_OK); |
977 | } | |
978 | ||
979 | /******************************************************************************* | |
980 | * | |
981 | * FUNCTION: acpi_ev_initialize_gpe_block | |
982 | * | |
983 | * PARAMETERS: gpe_device - Handle to the parent GPE block | |
984 | * gpe_block - Gpe Block info | |
985 | * | |
986 | * RETURN: Status | |
987 | * | |
988 | * DESCRIPTION: Initialize and enable a GPE block. First find and run any | |
989 | * _PRT methods associated with the block, then enable the | |
990 | * appropriate GPEs. | |
991 | * Note: Assumes namespace is locked. | |
992 | * | |
993 | ******************************************************************************/ | |
994 | ||
995 | acpi_status | |
996 | acpi_ev_initialize_gpe_block(struct acpi_namespace_node *gpe_device, | |
997 | struct acpi_gpe_block_info *gpe_block) | |
998 | { | |
999 | acpi_status status; | |
1000 | struct acpi_gpe_event_info *gpe_event_info; | |
1001 | struct acpi_gpe_walk_info gpe_info; | |
1002 | u32 wake_gpe_count; | |
1003 | u32 gpe_enabled_count; | |
67a119f9 BM |
1004 | u32 i; |
1005 | u32 j; | |
96db255c | 1006 | |
b229cf92 | 1007 | ACPI_FUNCTION_TRACE(ev_initialize_gpe_block); |
96db255c BM |
1008 | |
1009 | /* Ignore a null GPE block (e.g., if no GPE block 1 exists) */ | |
1010 | ||
1011 | if (!gpe_block) { | |
1012 | return_ACPI_STATUS(AE_OK); | |
1013 | } | |
1014 | ||
1da177e4 | 1015 | /* |
96db255c BM |
1016 | * Runtime option: Should wake GPEs be enabled at runtime? The default |
1017 | * is no, they should only be enabled just as the machine goes to sleep. | |
1da177e4 LT |
1018 | */ |
1019 | if (acpi_gbl_leave_wake_gpes_disabled) { | |
1020 | /* | |
96db255c BM |
1021 | * Differentiate runtime vs wake GPEs, via the _PRW control methods. |
1022 | * Each GPE that has one or more _PRWs that reference it is by | |
1023 | * definition a wake GPE and will not be enabled while the machine | |
1024 | * is running. | |
1da177e4 LT |
1025 | */ |
1026 | gpe_info.gpe_block = gpe_block; | |
1027 | gpe_info.gpe_device = gpe_device; | |
1028 | ||
4be44fcd LB |
1029 | status = |
1030 | acpi_ns_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, | |
1031 | ACPI_UINT32_MAX, ACPI_NS_WALK_UNLOCK, | |
1032 | acpi_ev_match_prw_and_gpe, &gpe_info, | |
1033 | NULL); | |
1da177e4 LT |
1034 | } |
1035 | ||
1036 | /* | |
96db255c BM |
1037 | * Enable all GPEs in this block that have these attributes: |
1038 | * 1) are "runtime" or "run/wake" GPEs, and | |
1039 | * 2) have a corresponding _Lxx or _Exx method | |
1040 | * | |
1041 | * Any other GPEs within this block must be enabled via the acpi_enable_gpe() | |
1042 | * external interface. | |
1da177e4 LT |
1043 | */ |
1044 | wake_gpe_count = 0; | |
1045 | gpe_enabled_count = 0; | |
1046 | ||
1047 | for (i = 0; i < gpe_block->register_count; i++) { | |
1048 | for (j = 0; j < 8; j++) { | |
52fc0b02 | 1049 | |
1da177e4 LT |
1050 | /* Get the info block for this particular GPE */ |
1051 | ||
4be44fcd LB |
1052 | gpe_event_info = |
1053 | &gpe_block-> | |
67a119f9 BM |
1054 | event_info[((acpi_size) i * |
1055 | ACPI_GPE_REGISTER_WIDTH) + j]; | |
1da177e4 | 1056 | |
4be44fcd LB |
1057 | if (((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) == |
1058 | ACPI_GPE_DISPATCH_METHOD) | |
fd350943 | 1059 | && (gpe_event_info->flags & ACPI_GPE_TYPE_RUNTIME)) { |
1da177e4 LT |
1060 | gpe_enabled_count++; |
1061 | } | |
1062 | ||
1063 | if (gpe_event_info->flags & ACPI_GPE_TYPE_WAKE) { | |
1064 | wake_gpe_count++; | |
1065 | } | |
1066 | } | |
1067 | } | |
1068 | ||
4be44fcd LB |
1069 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
1070 | "Found %u Wake, Enabled %u Runtime GPEs in this block\n", | |
1071 | wake_gpe_count, gpe_enabled_count)); | |
1da177e4 | 1072 | |
96db255c | 1073 | /* Enable all valid runtime GPEs found above */ |
1da177e4 | 1074 | |
e97d6bf1 | 1075 | status = acpi_hw_enable_runtime_gpe_block(NULL, gpe_block, NULL); |
96db255c | 1076 | if (ACPI_FAILURE(status)) { |
b229cf92 | 1077 | ACPI_ERROR((AE_INFO, "Could not enable GPEs in GpeBlock %p", |
b8e4d893 | 1078 | gpe_block)); |
1da177e4 LT |
1079 | } |
1080 | ||
96db255c | 1081 | return_ACPI_STATUS(status); |
1da177e4 LT |
1082 | } |
1083 | ||
1da177e4 LT |
1084 | /******************************************************************************* |
1085 | * | |
1086 | * FUNCTION: acpi_ev_gpe_initialize | |
1087 | * | |
1088 | * PARAMETERS: None | |
1089 | * | |
1090 | * RETURN: Status | |
1091 | * | |
1092 | * DESCRIPTION: Initialize the GPE data structures | |
1093 | * | |
1094 | ******************************************************************************/ | |
1095 | ||
4be44fcd | 1096 | acpi_status acpi_ev_gpe_initialize(void) |
1da177e4 | 1097 | { |
4be44fcd LB |
1098 | u32 register_count0 = 0; |
1099 | u32 register_count1 = 0; | |
1100 | u32 gpe_number_max = 0; | |
1101 | acpi_status status; | |
1da177e4 | 1102 | |
b229cf92 | 1103 | ACPI_FUNCTION_TRACE(ev_gpe_initialize); |
1da177e4 | 1104 | |
4be44fcd LB |
1105 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
1106 | if (ACPI_FAILURE(status)) { | |
1107 | return_ACPI_STATUS(status); | |
1da177e4 LT |
1108 | } |
1109 | ||
1110 | /* | |
1111 | * Initialize the GPE Block(s) defined in the FADT | |
1112 | * | |
1113 | * Why the GPE register block lengths are divided by 2: From the ACPI Spec, | |
1114 | * section "General-Purpose Event Registers", we have: | |
1115 | * | |
1116 | * "Each register block contains two registers of equal length | |
1117 | * GPEx_STS and GPEx_EN (where x is 0 or 1). The length of the | |
1118 | * GPE0_STS and GPE0_EN registers is equal to half the GPE0_LEN | |
1119 | * The length of the GPE1_STS and GPE1_EN registers is equal to | |
1120 | * half the GPE1_LEN. If a generic register block is not supported | |
1121 | * then its respective block pointer and block length values in the | |
1122 | * FADT table contain zeros. The GPE0_LEN and GPE1_LEN do not need | |
1123 | * to be the same size." | |
1124 | */ | |
1125 | ||
1126 | /* | |
1127 | * Determine the maximum GPE number for this machine. | |
1128 | * | |
1129 | * Note: both GPE0 and GPE1 are optional, and either can exist without | |
1130 | * the other. | |
1131 | * | |
1132 | * If EITHER the register length OR the block address are zero, then that | |
1133 | * particular block is not supported. | |
1134 | */ | |
f3d2e786 BM |
1135 | if (acpi_gbl_FADT.gpe0_block_length && |
1136 | acpi_gbl_FADT.xgpe0_block.address) { | |
52fc0b02 | 1137 | |
1da177e4 LT |
1138 | /* GPE block 0 exists (has both length and address > 0) */ |
1139 | ||
f3d2e786 | 1140 | register_count0 = (u16) (acpi_gbl_FADT.gpe0_block_length / 2); |
1da177e4 | 1141 | |
4be44fcd LB |
1142 | gpe_number_max = |
1143 | (register_count0 * ACPI_GPE_REGISTER_WIDTH) - 1; | |
1da177e4 LT |
1144 | |
1145 | /* Install GPE Block 0 */ | |
1146 | ||
4be44fcd | 1147 | status = acpi_ev_create_gpe_block(acpi_gbl_fadt_gpe_device, |
f3d2e786 | 1148 | &acpi_gbl_FADT.xgpe0_block, |
4be44fcd | 1149 | register_count0, 0, |
f3d2e786 | 1150 | acpi_gbl_FADT.sci_interrupt, |
4be44fcd | 1151 | &acpi_gbl_gpe_fadt_blocks[0]); |
1da177e4 | 1152 | |
4be44fcd | 1153 | if (ACPI_FAILURE(status)) { |
b8e4d893 BM |
1154 | ACPI_EXCEPTION((AE_INFO, status, |
1155 | "Could not create GPE Block 0")); | |
1da177e4 LT |
1156 | } |
1157 | } | |
1158 | ||
f3d2e786 BM |
1159 | if (acpi_gbl_FADT.gpe1_block_length && |
1160 | acpi_gbl_FADT.xgpe1_block.address) { | |
52fc0b02 | 1161 | |
1da177e4 LT |
1162 | /* GPE block 1 exists (has both length and address > 0) */ |
1163 | ||
f3d2e786 | 1164 | register_count1 = (u16) (acpi_gbl_FADT.gpe1_block_length / 2); |
1da177e4 LT |
1165 | |
1166 | /* Check for GPE0/GPE1 overlap (if both banks exist) */ | |
1167 | ||
1168 | if ((register_count0) && | |
f3d2e786 | 1169 | (gpe_number_max >= acpi_gbl_FADT.gpe1_base)) { |
b8e4d893 BM |
1170 | ACPI_ERROR((AE_INFO, |
1171 | "GPE0 block (GPE 0 to %d) overlaps the GPE1 block (GPE %d to %d) - Ignoring GPE1", | |
f3d2e786 BM |
1172 | gpe_number_max, acpi_gbl_FADT.gpe1_base, |
1173 | acpi_gbl_FADT.gpe1_base + | |
b8e4d893 BM |
1174 | ((register_count1 * |
1175 | ACPI_GPE_REGISTER_WIDTH) - 1))); | |
1da177e4 LT |
1176 | |
1177 | /* Ignore GPE1 block by setting the register count to zero */ | |
1178 | ||
1179 | register_count1 = 0; | |
4be44fcd | 1180 | } else { |
1da177e4 LT |
1181 | /* Install GPE Block 1 */ |
1182 | ||
4be44fcd LB |
1183 | status = |
1184 | acpi_ev_create_gpe_block(acpi_gbl_fadt_gpe_device, | |
f3d2e786 | 1185 | &acpi_gbl_FADT.xgpe1_block, |
4be44fcd | 1186 | register_count1, |
f3d2e786 BM |
1187 | acpi_gbl_FADT.gpe1_base, |
1188 | acpi_gbl_FADT. | |
1189 | sci_interrupt, | |
4be44fcd LB |
1190 | &acpi_gbl_gpe_fadt_blocks |
1191 | [1]); | |
1192 | ||
1193 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
1194 | ACPI_EXCEPTION((AE_INFO, status, |
1195 | "Could not create GPE Block 1")); | |
1da177e4 LT |
1196 | } |
1197 | ||
1198 | /* | |
1199 | * GPE0 and GPE1 do not have to be contiguous in the GPE number | |
1200 | * space. However, GPE0 always starts at GPE number zero. | |
1201 | */ | |
f3d2e786 | 1202 | gpe_number_max = acpi_gbl_FADT.gpe1_base + |
4be44fcd | 1203 | ((register_count1 * ACPI_GPE_REGISTER_WIDTH) - 1); |
1da177e4 LT |
1204 | } |
1205 | } | |
1206 | ||
1207 | /* Exit if there are no GPE registers */ | |
1208 | ||
1209 | if ((register_count0 + register_count1) == 0) { | |
52fc0b02 | 1210 | |
1da177e4 LT |
1211 | /* GPEs are not required by ACPI, this is OK */ |
1212 | ||
4be44fcd LB |
1213 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
1214 | "There are no GPE blocks defined in the FADT\n")); | |
1da177e4 LT |
1215 | status = AE_OK; |
1216 | goto cleanup; | |
1217 | } | |
1218 | ||
1219 | /* Check for Max GPE number out-of-range */ | |
1220 | ||
1221 | if (gpe_number_max > ACPI_GPE_MAX) { | |
b8e4d893 BM |
1222 | ACPI_ERROR((AE_INFO, |
1223 | "Maximum GPE number from FADT is too large: 0x%X", | |
1224 | gpe_number_max)); | |
1da177e4 LT |
1225 | status = AE_BAD_VALUE; |
1226 | goto cleanup; | |
1227 | } | |
1228 | ||
4be44fcd LB |
1229 | cleanup: |
1230 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); | |
1231 | return_ACPI_STATUS(AE_OK); | |
1da177e4 | 1232 | } |