Commit | Line | Data |
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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> | |
e2f7a777 LB |
45 | #include "accommon.h" |
46 | #include "acevents.h" | |
47 | #include "acnamesp.h" | |
1da177e4 LT |
48 | |
49 | #define _COMPONENT ACPI_EVENTS | |
4be44fcd | 50 | ACPI_MODULE_NAME("evgpeblk") |
1da177e4 | 51 | |
44f6c012 | 52 | /* Local prototypes */ |
44f6c012 | 53 | static acpi_status |
4be44fcd LB |
54 | acpi_ev_save_method_info(acpi_handle obj_handle, |
55 | u32 level, void *obj_desc, void **return_value); | |
44f6c012 RM |
56 | |
57 | static acpi_status | |
4be44fcd LB |
58 | acpi_ev_match_prw_and_gpe(acpi_handle obj_handle, |
59 | u32 level, void *info, void **return_value); | |
44f6c012 | 60 | |
4be44fcd LB |
61 | static struct acpi_gpe_xrupt_info *acpi_ev_get_gpe_xrupt_block(u32 |
62 | interrupt_number); | |
44f6c012 RM |
63 | |
64 | static acpi_status | |
4be44fcd | 65 | acpi_ev_delete_gpe_xrupt(struct acpi_gpe_xrupt_info *gpe_xrupt); |
44f6c012 RM |
66 | |
67 | static acpi_status | |
4be44fcd LB |
68 | acpi_ev_install_gpe_block(struct acpi_gpe_block_info *gpe_block, |
69 | u32 interrupt_number); | |
44f6c012 RM |
70 | |
71 | static acpi_status | |
4be44fcd | 72 | acpi_ev_create_gpe_info_blocks(struct acpi_gpe_block_info *gpe_block); |
1da177e4 LT |
73 | |
74 | /******************************************************************************* | |
75 | * | |
76 | * FUNCTION: acpi_ev_valid_gpe_event | |
77 | * | |
78 | * PARAMETERS: gpe_event_info - Info for this GPE | |
79 | * | |
80 | * RETURN: TRUE if the gpe_event is valid | |
81 | * | |
96db255c | 82 | * DESCRIPTION: Validate a GPE event. DO NOT CALL FROM INTERRUPT LEVEL. |
1da177e4 LT |
83 | * Should be called only when the GPE lists are semaphore locked |
84 | * and not subject to change. | |
85 | * | |
86 | ******************************************************************************/ | |
87 | ||
4be44fcd | 88 | u8 acpi_ev_valid_gpe_event(struct acpi_gpe_event_info *gpe_event_info) |
1da177e4 | 89 | { |
4be44fcd LB |
90 | struct acpi_gpe_xrupt_info *gpe_xrupt_block; |
91 | struct acpi_gpe_block_info *gpe_block; | |
1da177e4 | 92 | |
4be44fcd | 93 | ACPI_FUNCTION_ENTRY(); |
1da177e4 LT |
94 | |
95 | /* No need for spin lock since we are not changing any list elements */ | |
96 | ||
97 | /* Walk the GPE interrupt levels */ | |
98 | ||
99 | gpe_xrupt_block = acpi_gbl_gpe_xrupt_list_head; | |
100 | while (gpe_xrupt_block) { | |
101 | gpe_block = gpe_xrupt_block->gpe_block_list_head; | |
102 | ||
103 | /* Walk the GPE blocks on this interrupt level */ | |
104 | ||
105 | while (gpe_block) { | |
106 | if ((&gpe_block->event_info[0] <= gpe_event_info) && | |
4be44fcd LB |
107 | (&gpe_block-> |
108 | event_info[((acpi_size) gpe_block-> | |
109 | register_count) * 8] > | |
110 | gpe_event_info)) { | |
1da177e4 LT |
111 | return (TRUE); |
112 | } | |
113 | ||
114 | gpe_block = gpe_block->next; | |
115 | } | |
116 | ||
117 | gpe_xrupt_block = gpe_xrupt_block->next; | |
118 | } | |
119 | ||
120 | return (FALSE); | |
121 | } | |
122 | ||
1da177e4 LT |
123 | /******************************************************************************* |
124 | * | |
125 | * FUNCTION: acpi_ev_walk_gpe_list | |
126 | * | |
127 | * PARAMETERS: gpe_walk_callback - Routine called for each GPE block | |
e97d6bf1 | 128 | * Context - Value passed to callback |
1da177e4 LT |
129 | * |
130 | * RETURN: Status | |
131 | * | |
132 | * DESCRIPTION: Walk the GPE lists. | |
133 | * | |
134 | ******************************************************************************/ | |
135 | ||
e97d6bf1 BM |
136 | acpi_status |
137 | acpi_ev_walk_gpe_list(acpi_gpe_callback gpe_walk_callback, void *context) | |
1da177e4 | 138 | { |
4be44fcd LB |
139 | struct acpi_gpe_block_info *gpe_block; |
140 | struct acpi_gpe_xrupt_info *gpe_xrupt_info; | |
141 | acpi_status status = AE_OK; | |
b8e4d893 | 142 | acpi_cpu_flags flags; |
1da177e4 | 143 | |
b229cf92 | 144 | ACPI_FUNCTION_TRACE(ev_walk_gpe_list); |
1da177e4 | 145 | |
4be44fcd | 146 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
1da177e4 LT |
147 | |
148 | /* Walk the interrupt level descriptor list */ | |
149 | ||
150 | gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head; | |
151 | while (gpe_xrupt_info) { | |
52fc0b02 | 152 | |
1da177e4 LT |
153 | /* Walk all Gpe Blocks attached to this interrupt level */ |
154 | ||
155 | gpe_block = gpe_xrupt_info->gpe_block_list_head; | |
156 | while (gpe_block) { | |
52fc0b02 | 157 | |
1da177e4 LT |
158 | /* One callback per GPE block */ |
159 | ||
e97d6bf1 BM |
160 | status = |
161 | gpe_walk_callback(gpe_xrupt_info, gpe_block, | |
162 | context); | |
4be44fcd | 163 | if (ACPI_FAILURE(status)) { |
e97d6bf1 BM |
164 | if (status == AE_CTRL_END) { /* Callback abort */ |
165 | status = AE_OK; | |
166 | } | |
1da177e4 LT |
167 | goto unlock_and_exit; |
168 | } | |
169 | ||
170 | gpe_block = gpe_block->next; | |
171 | } | |
172 | ||
173 | gpe_xrupt_info = gpe_xrupt_info->next; | |
174 | } | |
175 | ||
4be44fcd LB |
176 | unlock_and_exit: |
177 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
178 | return_ACPI_STATUS(status); | |
1da177e4 LT |
179 | } |
180 | ||
44f6c012 | 181 | /******************************************************************************* |
1da177e4 LT |
182 | * |
183 | * FUNCTION: acpi_ev_delete_gpe_handlers | |
184 | * | |
185 | * PARAMETERS: gpe_xrupt_info - GPE Interrupt info | |
186 | * gpe_block - Gpe Block info | |
187 | * | |
188 | * RETURN: Status | |
189 | * | |
190 | * DESCRIPTION: Delete all Handler objects found in the GPE data structs. | |
191 | * Used only prior to termination. | |
192 | * | |
193 | ******************************************************************************/ | |
194 | ||
195 | acpi_status | |
4be44fcd | 196 | acpi_ev_delete_gpe_handlers(struct acpi_gpe_xrupt_info *gpe_xrupt_info, |
e97d6bf1 BM |
197 | struct acpi_gpe_block_info *gpe_block, |
198 | void *context) | |
1da177e4 | 199 | { |
4be44fcd | 200 | struct acpi_gpe_event_info *gpe_event_info; |
67a119f9 BM |
201 | u32 i; |
202 | u32 j; | |
1da177e4 | 203 | |
b229cf92 | 204 | ACPI_FUNCTION_TRACE(ev_delete_gpe_handlers); |
1da177e4 LT |
205 | |
206 | /* Examine each GPE Register within the block */ | |
207 | ||
208 | for (i = 0; i < gpe_block->register_count; i++) { | |
52fc0b02 | 209 | |
1da177e4 LT |
210 | /* Now look at the individual GPEs in this byte register */ |
211 | ||
212 | for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) { | |
4be44fcd LB |
213 | gpe_event_info = |
214 | &gpe_block-> | |
67a119f9 BM |
215 | event_info[((acpi_size) i * |
216 | ACPI_GPE_REGISTER_WIDTH) + j]; | |
1da177e4 | 217 | |
44f6c012 | 218 | if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) == |
4be44fcd | 219 | ACPI_GPE_DISPATCH_HANDLER) { |
8313524a | 220 | ACPI_FREE(gpe_event_info->dispatch.handler); |
1da177e4 | 221 | gpe_event_info->dispatch.handler = NULL; |
4be44fcd LB |
222 | gpe_event_info->flags &= |
223 | ~ACPI_GPE_DISPATCH_MASK; | |
1da177e4 LT |
224 | } |
225 | } | |
226 | } | |
227 | ||
4be44fcd | 228 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
229 | } |
230 | ||
1da177e4 LT |
231 | /******************************************************************************* |
232 | * | |
233 | * FUNCTION: acpi_ev_save_method_info | |
234 | * | |
235 | * PARAMETERS: Callback from walk_namespace | |
236 | * | |
237 | * RETURN: Status | |
238 | * | |
239 | * DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a | |
240 | * control method under the _GPE portion of the namespace. | |
241 | * Extract the name and GPE type from the object, saving this | |
242 | * information for quick lookup during GPE dispatch | |
243 | * | |
244 | * The name of each GPE control method is of the form: | |
245 | * "_Lxx" or "_Exx" | |
246 | * Where: | |
247 | * L - means that the GPE is level triggered | |
248 | * E - means that the GPE is edge triggered | |
249 | * xx - is the GPE number [in HEX] | |
250 | * | |
251 | ******************************************************************************/ | |
252 | ||
253 | static acpi_status | |
4be44fcd LB |
254 | acpi_ev_save_method_info(acpi_handle obj_handle, |
255 | u32 level, void *obj_desc, void **return_value) | |
1da177e4 | 256 | { |
4be44fcd LB |
257 | struct acpi_gpe_block_info *gpe_block = (void *)obj_desc; |
258 | struct acpi_gpe_event_info *gpe_event_info; | |
259 | u32 gpe_number; | |
260 | char name[ACPI_NAME_SIZE + 1]; | |
261 | u8 type; | |
262 | acpi_status status; | |
1da177e4 | 263 | |
b229cf92 | 264 | ACPI_FUNCTION_TRACE(ev_save_method_info); |
1da177e4 LT |
265 | |
266 | /* | |
267 | * _Lxx and _Exx GPE method support | |
268 | * | |
269 | * 1) Extract the name from the object and convert to a string | |
270 | */ | |
4be44fcd LB |
271 | ACPI_MOVE_32_TO_32(name, |
272 | &((struct acpi_namespace_node *)obj_handle)->name. | |
273 | integer); | |
1da177e4 LT |
274 | name[ACPI_NAME_SIZE] = 0; |
275 | ||
276 | /* | |
277 | * 2) Edge/Level determination is based on the 2nd character | |
278 | * of the method name | |
279 | * | |
96db255c | 280 | * NOTE: Default GPE type is RUNTIME. May be changed later to WAKE |
1da177e4 LT |
281 | * if a _PRW object is found that points to this GPE. |
282 | */ | |
283 | switch (name[1]) { | |
284 | case 'L': | |
285 | type = ACPI_GPE_LEVEL_TRIGGERED; | |
286 | break; | |
287 | ||
288 | case 'E': | |
289 | type = ACPI_GPE_EDGE_TRIGGERED; | |
290 | break; | |
291 | ||
292 | default: | |
293 | /* Unknown method type, just ignore it! */ | |
294 | ||
b229cf92 BM |
295 | ACPI_DEBUG_PRINT((ACPI_DB_LOAD, |
296 | "Ignoring unknown GPE method type: %s (name not of form _Lxx or _Exx)", | |
297 | name)); | |
4be44fcd | 298 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
299 | } |
300 | ||
301 | /* Convert the last two characters of the name to the GPE Number */ | |
302 | ||
4be44fcd | 303 | gpe_number = ACPI_STRTOUL(&name[2], NULL, 16); |
1da177e4 | 304 | if (gpe_number == ACPI_UINT32_MAX) { |
52fc0b02 | 305 | |
1da177e4 LT |
306 | /* Conversion failed; invalid method, just ignore it */ |
307 | ||
b229cf92 BM |
308 | ACPI_DEBUG_PRINT((ACPI_DB_LOAD, |
309 | "Could not extract GPE number from name: %s (name is not of form _Lxx or _Exx)", | |
310 | name)); | |
4be44fcd | 311 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
312 | } |
313 | ||
314 | /* Ensure that we have a valid GPE number for this GPE block */ | |
315 | ||
316 | if ((gpe_number < gpe_block->block_base_number) || | |
4be44fcd LB |
317 | (gpe_number >= |
318 | (gpe_block->block_base_number + | |
319 | (gpe_block->register_count * 8)))) { | |
1da177e4 | 320 | /* |
9f15fc66 BM |
321 | * Not valid for this GPE block, just ignore it. However, it may be |
322 | * valid for a different GPE block, since GPE0 and GPE1 methods both | |
323 | * appear under \_GPE. | |
1da177e4 | 324 | */ |
4be44fcd | 325 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
326 | } |
327 | ||
328 | /* | |
9f15fc66 BM |
329 | * Now we can add this information to the gpe_event_info block for use |
330 | * during dispatch of this GPE. Default type is RUNTIME, although this may | |
331 | * change when the _PRW methods are executed later. | |
1da177e4 | 332 | */ |
4be44fcd LB |
333 | gpe_event_info = |
334 | &gpe_block->event_info[gpe_number - gpe_block->block_base_number]; | |
1da177e4 | 335 | |
96db255c BM |
336 | gpe_event_info->flags = (u8) |
337 | (type | ACPI_GPE_DISPATCH_METHOD | ACPI_GPE_TYPE_RUNTIME); | |
1da177e4 | 338 | |
4be44fcd LB |
339 | gpe_event_info->dispatch.method_node = |
340 | (struct acpi_namespace_node *)obj_handle; | |
1da177e4 LT |
341 | |
342 | /* Update enable mask, but don't enable the HW GPE as of yet */ | |
343 | ||
4be44fcd | 344 | status = acpi_ev_enable_gpe(gpe_event_info, FALSE); |
1da177e4 | 345 | |
4be44fcd LB |
346 | ACPI_DEBUG_PRINT((ACPI_DB_LOAD, |
347 | "Registered GPE method %s as GPE number 0x%.2X\n", | |
348 | name, gpe_number)); | |
349 | return_ACPI_STATUS(status); | |
1da177e4 LT |
350 | } |
351 | ||
1da177e4 LT |
352 | /******************************************************************************* |
353 | * | |
354 | * FUNCTION: acpi_ev_match_prw_and_gpe | |
355 | * | |
356 | * PARAMETERS: Callback from walk_namespace | |
357 | * | |
96db255c | 358 | * RETURN: Status. NOTE: We ignore errors so that the _PRW walk is |
1da177e4 LT |
359 | * not aborted on a single _PRW failure. |
360 | * | |
361 | * DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a | |
96db255c | 362 | * Device. Run the _PRW method. If present, extract the GPE |
1da177e4 LT |
363 | * number and mark the GPE as a WAKE GPE. |
364 | * | |
365 | ******************************************************************************/ | |
366 | ||
367 | static acpi_status | |
4be44fcd LB |
368 | acpi_ev_match_prw_and_gpe(acpi_handle obj_handle, |
369 | u32 level, void *info, void **return_value) | |
1da177e4 | 370 | { |
4be44fcd LB |
371 | struct acpi_gpe_walk_info *gpe_info = (void *)info; |
372 | struct acpi_namespace_node *gpe_device; | |
373 | struct acpi_gpe_block_info *gpe_block; | |
374 | struct acpi_namespace_node *target_gpe_device; | |
375 | struct acpi_gpe_event_info *gpe_event_info; | |
376 | union acpi_operand_object *pkg_desc; | |
377 | union acpi_operand_object *obj_desc; | |
378 | u32 gpe_number; | |
379 | acpi_status status; | |
380 | ||
b229cf92 | 381 | ACPI_FUNCTION_TRACE(ev_match_prw_and_gpe); |
1da177e4 LT |
382 | |
383 | /* Check for a _PRW method under this device */ | |
384 | ||
4be44fcd LB |
385 | status = acpi_ut_evaluate_object(obj_handle, METHOD_NAME__PRW, |
386 | ACPI_BTYPE_PACKAGE, &pkg_desc); | |
387 | if (ACPI_FAILURE(status)) { | |
52fc0b02 | 388 | |
1da177e4 LT |
389 | /* Ignore all errors from _PRW, we don't want to abort the subsystem */ |
390 | ||
4be44fcd | 391 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
392 | } |
393 | ||
394 | /* The returned _PRW package must have at least two elements */ | |
395 | ||
396 | if (pkg_desc->package.count < 2) { | |
397 | goto cleanup; | |
398 | } | |
399 | ||
400 | /* Extract pointers from the input context */ | |
401 | ||
402 | gpe_device = gpe_info->gpe_device; | |
403 | gpe_block = gpe_info->gpe_block; | |
404 | ||
405 | /* | |
9f15fc66 BM |
406 | * The _PRW object must return a package, we are only interested in the |
407 | * first element | |
1da177e4 LT |
408 | */ |
409 | obj_desc = pkg_desc->package.elements[0]; | |
410 | ||
4be44fcd | 411 | if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_INTEGER) { |
52fc0b02 | 412 | |
1da177e4 LT |
413 | /* Use FADT-defined GPE device (from definition of _PRW) */ |
414 | ||
415 | target_gpe_device = acpi_gbl_fadt_gpe_device; | |
416 | ||
417 | /* Integer is the GPE number in the FADT described GPE blocks */ | |
418 | ||
419 | gpe_number = (u32) obj_desc->integer.value; | |
4be44fcd | 420 | } else if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_PACKAGE) { |
52fc0b02 | 421 | |
1da177e4 LT |
422 | /* Package contains a GPE reference and GPE number within a GPE block */ |
423 | ||
424 | if ((obj_desc->package.count < 2) || | |
4be44fcd LB |
425 | (ACPI_GET_OBJECT_TYPE(obj_desc->package.elements[0]) != |
426 | ACPI_TYPE_LOCAL_REFERENCE) | |
427 | || (ACPI_GET_OBJECT_TYPE(obj_desc->package.elements[1]) != | |
428 | ACPI_TYPE_INTEGER)) { | |
1da177e4 LT |
429 | goto cleanup; |
430 | } | |
431 | ||
432 | /* Get GPE block reference and decode */ | |
433 | ||
4be44fcd LB |
434 | target_gpe_device = |
435 | obj_desc->package.elements[0]->reference.node; | |
1da177e4 | 436 | gpe_number = (u32) obj_desc->package.elements[1]->integer.value; |
4be44fcd | 437 | } else { |
1da177e4 LT |
438 | /* Unknown type, just ignore it */ |
439 | ||
440 | goto cleanup; | |
441 | } | |
442 | ||
443 | /* | |
444 | * Is this GPE within this block? | |
445 | * | |
9f15fc66 | 446 | * TRUE if and only if these conditions are true: |
1da177e4 LT |
447 | * 1) The GPE devices match. |
448 | * 2) The GPE index(number) is within the range of the Gpe Block | |
449 | * associated with the GPE device. | |
450 | */ | |
451 | if ((gpe_device == target_gpe_device) && | |
4be44fcd LB |
452 | (gpe_number >= gpe_block->block_base_number) && |
453 | (gpe_number < | |
454 | gpe_block->block_base_number + (gpe_block->register_count * 8))) { | |
455 | gpe_event_info = | |
456 | &gpe_block->event_info[gpe_number - | |
457 | gpe_block->block_base_number]; | |
1da177e4 LT |
458 | |
459 | /* Mark GPE for WAKE-ONLY but WAKE_DISABLED */ | |
460 | ||
4be44fcd LB |
461 | gpe_event_info->flags &= |
462 | ~(ACPI_GPE_WAKE_ENABLED | ACPI_GPE_RUN_ENABLED); | |
96db255c | 463 | |
4be44fcd LB |
464 | status = |
465 | acpi_ev_set_gpe_type(gpe_event_info, ACPI_GPE_TYPE_WAKE); | |
466 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
467 | goto cleanup; |
468 | } | |
9f15fc66 | 469 | |
4be44fcd LB |
470 | status = |
471 | acpi_ev_update_gpe_enable_masks(gpe_event_info, | |
472 | ACPI_GPE_DISABLE); | |
1da177e4 LT |
473 | } |
474 | ||
4be44fcd LB |
475 | cleanup: |
476 | acpi_ut_remove_reference(pkg_desc); | |
477 | return_ACPI_STATUS(AE_OK); | |
1da177e4 LT |
478 | } |
479 | ||
1da177e4 LT |
480 | /******************************************************************************* |
481 | * | |
482 | * FUNCTION: acpi_ev_get_gpe_xrupt_block | |
483 | * | |
6f42ccf2 | 484 | * PARAMETERS: interrupt_number - Interrupt for a GPE block |
1da177e4 LT |
485 | * |
486 | * RETURN: A GPE interrupt block | |
487 | * | |
96db255c | 488 | * DESCRIPTION: Get or Create a GPE interrupt block. There is one interrupt |
9f15fc66 BM |
489 | * block per unique interrupt level used for GPEs. Should be |
490 | * called only when the GPE lists are semaphore locked and not | |
491 | * subject to change. | |
1da177e4 LT |
492 | * |
493 | ******************************************************************************/ | |
494 | ||
4be44fcd LB |
495 | static struct acpi_gpe_xrupt_info *acpi_ev_get_gpe_xrupt_block(u32 |
496 | interrupt_number) | |
1da177e4 | 497 | { |
4be44fcd LB |
498 | struct acpi_gpe_xrupt_info *next_gpe_xrupt; |
499 | struct acpi_gpe_xrupt_info *gpe_xrupt; | |
500 | acpi_status status; | |
b8e4d893 | 501 | acpi_cpu_flags flags; |
1da177e4 | 502 | |
b229cf92 | 503 | ACPI_FUNCTION_TRACE(ev_get_gpe_xrupt_block); |
1da177e4 | 504 | |
44f6c012 | 505 | /* No need for lock since we are not changing any list elements here */ |
1da177e4 LT |
506 | |
507 | next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head; | |
508 | while (next_gpe_xrupt) { | |
6f42ccf2 | 509 | if (next_gpe_xrupt->interrupt_number == interrupt_number) { |
4be44fcd | 510 | return_PTR(next_gpe_xrupt); |
1da177e4 LT |
511 | } |
512 | ||
513 | next_gpe_xrupt = next_gpe_xrupt->next; | |
514 | } | |
515 | ||
516 | /* Not found, must allocate a new xrupt descriptor */ | |
517 | ||
8313524a | 518 | gpe_xrupt = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_xrupt_info)); |
1da177e4 | 519 | if (!gpe_xrupt) { |
4be44fcd | 520 | return_PTR(NULL); |
1da177e4 LT |
521 | } |
522 | ||
6f42ccf2 | 523 | gpe_xrupt->interrupt_number = interrupt_number; |
1da177e4 LT |
524 | |
525 | /* Install new interrupt descriptor with spin lock */ | |
526 | ||
4be44fcd | 527 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
1da177e4 LT |
528 | if (acpi_gbl_gpe_xrupt_list_head) { |
529 | next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head; | |
530 | while (next_gpe_xrupt->next) { | |
531 | next_gpe_xrupt = next_gpe_xrupt->next; | |
532 | } | |
533 | ||
534 | next_gpe_xrupt->next = gpe_xrupt; | |
535 | gpe_xrupt->previous = next_gpe_xrupt; | |
4be44fcd | 536 | } else { |
1da177e4 LT |
537 | acpi_gbl_gpe_xrupt_list_head = gpe_xrupt; |
538 | } | |
4be44fcd | 539 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
1da177e4 LT |
540 | |
541 | /* Install new interrupt handler if not SCI_INT */ | |
542 | ||
f3d2e786 | 543 | if (interrupt_number != acpi_gbl_FADT.sci_interrupt) { |
4be44fcd LB |
544 | status = acpi_os_install_interrupt_handler(interrupt_number, |
545 | acpi_ev_gpe_xrupt_handler, | |
546 | gpe_xrupt); | |
547 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
548 | ACPI_ERROR((AE_INFO, |
549 | "Could not install GPE interrupt handler at level 0x%X", | |
550 | interrupt_number)); | |
4be44fcd | 551 | return_PTR(NULL); |
1da177e4 LT |
552 | } |
553 | } | |
554 | ||
4be44fcd | 555 | return_PTR(gpe_xrupt); |
1da177e4 LT |
556 | } |
557 | ||
1da177e4 LT |
558 | /******************************************************************************* |
559 | * | |
560 | * FUNCTION: acpi_ev_delete_gpe_xrupt | |
561 | * | |
562 | * PARAMETERS: gpe_xrupt - A GPE interrupt info block | |
563 | * | |
564 | * RETURN: Status | |
565 | * | |
566 | * DESCRIPTION: Remove and free a gpe_xrupt block. Remove an associated | |
567 | * interrupt handler if not the SCI interrupt. | |
568 | * | |
569 | ******************************************************************************/ | |
570 | ||
571 | static acpi_status | |
4be44fcd | 572 | acpi_ev_delete_gpe_xrupt(struct acpi_gpe_xrupt_info *gpe_xrupt) |
1da177e4 | 573 | { |
4be44fcd | 574 | acpi_status status; |
b8e4d893 | 575 | acpi_cpu_flags flags; |
1da177e4 | 576 | |
b229cf92 | 577 | ACPI_FUNCTION_TRACE(ev_delete_gpe_xrupt); |
1da177e4 LT |
578 | |
579 | /* We never want to remove the SCI interrupt handler */ | |
580 | ||
f3d2e786 | 581 | if (gpe_xrupt->interrupt_number == acpi_gbl_FADT.sci_interrupt) { |
1da177e4 | 582 | gpe_xrupt->gpe_block_list_head = NULL; |
4be44fcd | 583 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
584 | } |
585 | ||
586 | /* Disable this interrupt */ | |
587 | ||
96db255c BM |
588 | status = |
589 | acpi_os_remove_interrupt_handler(gpe_xrupt->interrupt_number, | |
590 | acpi_ev_gpe_xrupt_handler); | |
4be44fcd LB |
591 | if (ACPI_FAILURE(status)) { |
592 | return_ACPI_STATUS(status); | |
1da177e4 LT |
593 | } |
594 | ||
595 | /* Unlink the interrupt block with lock */ | |
596 | ||
4be44fcd | 597 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
1da177e4 LT |
598 | if (gpe_xrupt->previous) { |
599 | gpe_xrupt->previous->next = gpe_xrupt->next; | |
e0b91050 BM |
600 | } else { |
601 | /* No previous, update list head */ | |
602 | ||
603 | acpi_gbl_gpe_xrupt_list_head = gpe_xrupt->next; | |
1da177e4 LT |
604 | } |
605 | ||
606 | if (gpe_xrupt->next) { | |
607 | gpe_xrupt->next->previous = gpe_xrupt->previous; | |
608 | } | |
4be44fcd | 609 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
1da177e4 LT |
610 | |
611 | /* Free the block */ | |
612 | ||
8313524a | 613 | ACPI_FREE(gpe_xrupt); |
4be44fcd | 614 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
615 | } |
616 | ||
1da177e4 LT |
617 | /******************************************************************************* |
618 | * | |
619 | * FUNCTION: acpi_ev_install_gpe_block | |
620 | * | |
9f15fc66 BM |
621 | * PARAMETERS: gpe_block - New GPE block |
622 | * interrupt_number - Xrupt to be associated with this | |
623 | * GPE block | |
1da177e4 LT |
624 | * |
625 | * RETURN: Status | |
626 | * | |
627 | * DESCRIPTION: Install new GPE block with mutex support | |
628 | * | |
629 | ******************************************************************************/ | |
630 | ||
631 | static acpi_status | |
4be44fcd LB |
632 | acpi_ev_install_gpe_block(struct acpi_gpe_block_info *gpe_block, |
633 | u32 interrupt_number) | |
1da177e4 | 634 | { |
4be44fcd LB |
635 | struct acpi_gpe_block_info *next_gpe_block; |
636 | struct acpi_gpe_xrupt_info *gpe_xrupt_block; | |
637 | acpi_status status; | |
b8e4d893 | 638 | acpi_cpu_flags flags; |
1da177e4 | 639 | |
b229cf92 | 640 | ACPI_FUNCTION_TRACE(ev_install_gpe_block); |
1da177e4 | 641 | |
4be44fcd LB |
642 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
643 | if (ACPI_FAILURE(status)) { | |
644 | return_ACPI_STATUS(status); | |
1da177e4 LT |
645 | } |
646 | ||
4be44fcd | 647 | gpe_xrupt_block = acpi_ev_get_gpe_xrupt_block(interrupt_number); |
1da177e4 LT |
648 | if (!gpe_xrupt_block) { |
649 | status = AE_NO_MEMORY; | |
650 | goto unlock_and_exit; | |
651 | } | |
652 | ||
44f6c012 | 653 | /* Install the new block at the end of the list with lock */ |
1da177e4 | 654 | |
4be44fcd | 655 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
1da177e4 LT |
656 | if (gpe_xrupt_block->gpe_block_list_head) { |
657 | next_gpe_block = gpe_xrupt_block->gpe_block_list_head; | |
658 | while (next_gpe_block->next) { | |
659 | next_gpe_block = next_gpe_block->next; | |
660 | } | |
661 | ||
662 | next_gpe_block->next = gpe_block; | |
663 | gpe_block->previous = next_gpe_block; | |
4be44fcd | 664 | } else { |
1da177e4 LT |
665 | gpe_xrupt_block->gpe_block_list_head = gpe_block; |
666 | } | |
667 | ||
668 | gpe_block->xrupt_block = gpe_xrupt_block; | |
4be44fcd | 669 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
1da177e4 | 670 | |
4be44fcd LB |
671 | unlock_and_exit: |
672 | status = acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
673 | return_ACPI_STATUS(status); | |
1da177e4 LT |
674 | } |
675 | ||
1da177e4 LT |
676 | /******************************************************************************* |
677 | * | |
678 | * FUNCTION: acpi_ev_delete_gpe_block | |
679 | * | |
9f15fc66 | 680 | * PARAMETERS: gpe_block - Existing GPE block |
1da177e4 LT |
681 | * |
682 | * RETURN: Status | |
683 | * | |
684 | * DESCRIPTION: Remove a GPE block | |
685 | * | |
686 | ******************************************************************************/ | |
687 | ||
4be44fcd | 688 | acpi_status acpi_ev_delete_gpe_block(struct acpi_gpe_block_info *gpe_block) |
1da177e4 | 689 | { |
4be44fcd | 690 | acpi_status status; |
b8e4d893 | 691 | acpi_cpu_flags flags; |
1da177e4 | 692 | |
b229cf92 | 693 | ACPI_FUNCTION_TRACE(ev_install_gpe_block); |
1da177e4 | 694 | |
4be44fcd LB |
695 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
696 | if (ACPI_FAILURE(status)) { | |
697 | return_ACPI_STATUS(status); | |
1da177e4 LT |
698 | } |
699 | ||
700 | /* Disable all GPEs in this block */ | |
701 | ||
e97d6bf1 BM |
702 | status = |
703 | acpi_hw_disable_gpe_block(gpe_block->xrupt_block, gpe_block, NULL); | |
1da177e4 LT |
704 | |
705 | if (!gpe_block->previous && !gpe_block->next) { | |
52fc0b02 | 706 | |
1da177e4 LT |
707 | /* This is the last gpe_block on this interrupt */ |
708 | ||
4be44fcd LB |
709 | status = acpi_ev_delete_gpe_xrupt(gpe_block->xrupt_block); |
710 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
711 | goto unlock_and_exit; |
712 | } | |
4be44fcd | 713 | } else { |
1da177e4 LT |
714 | /* Remove the block on this interrupt with lock */ |
715 | ||
4be44fcd | 716 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
1da177e4 LT |
717 | if (gpe_block->previous) { |
718 | gpe_block->previous->next = gpe_block->next; | |
4be44fcd LB |
719 | } else { |
720 | gpe_block->xrupt_block->gpe_block_list_head = | |
721 | gpe_block->next; | |
1da177e4 LT |
722 | } |
723 | ||
724 | if (gpe_block->next) { | |
725 | gpe_block->next->previous = gpe_block->previous; | |
726 | } | |
4be44fcd | 727 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
1da177e4 LT |
728 | } |
729 | ||
e97d6bf1 BM |
730 | acpi_current_gpe_count -= |
731 | gpe_block->register_count * ACPI_GPE_REGISTER_WIDTH; | |
732 | ||
1da177e4 LT |
733 | /* Free the gpe_block */ |
734 | ||
8313524a BM |
735 | ACPI_FREE(gpe_block->register_info); |
736 | ACPI_FREE(gpe_block->event_info); | |
737 | ACPI_FREE(gpe_block); | |
1da177e4 | 738 | |
4be44fcd LB |
739 | unlock_and_exit: |
740 | status = acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
741 | return_ACPI_STATUS(status); | |
1da177e4 LT |
742 | } |
743 | ||
1da177e4 LT |
744 | /******************************************************************************* |
745 | * | |
746 | * FUNCTION: acpi_ev_create_gpe_info_blocks | |
747 | * | |
748 | * PARAMETERS: gpe_block - New GPE block | |
749 | * | |
750 | * RETURN: Status | |
751 | * | |
752 | * DESCRIPTION: Create the register_info and event_info blocks for this GPE block | |
753 | * | |
754 | ******************************************************************************/ | |
755 | ||
756 | static acpi_status | |
4be44fcd | 757 | acpi_ev_create_gpe_info_blocks(struct acpi_gpe_block_info *gpe_block) |
1da177e4 | 758 | { |
4be44fcd LB |
759 | struct acpi_gpe_register_info *gpe_register_info = NULL; |
760 | struct acpi_gpe_event_info *gpe_event_info = NULL; | |
761 | struct acpi_gpe_event_info *this_event; | |
762 | struct acpi_gpe_register_info *this_register; | |
67a119f9 BM |
763 | u32 i; |
764 | u32 j; | |
4be44fcd | 765 | acpi_status status; |
1da177e4 | 766 | |
b229cf92 | 767 | ACPI_FUNCTION_TRACE(ev_create_gpe_info_blocks); |
1da177e4 LT |
768 | |
769 | /* Allocate the GPE register information block */ | |
770 | ||
8313524a BM |
771 | gpe_register_info = ACPI_ALLOCATE_ZEROED((acpi_size) gpe_block-> |
772 | register_count * | |
773 | sizeof(struct | |
774 | acpi_gpe_register_info)); | |
1da177e4 | 775 | if (!gpe_register_info) { |
b8e4d893 | 776 | ACPI_ERROR((AE_INFO, |
b229cf92 | 777 | "Could not allocate the GpeRegisterInfo table")); |
4be44fcd | 778 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
779 | } |
780 | ||
781 | /* | |
782 | * Allocate the GPE event_info block. There are eight distinct GPEs | |
96db255c | 783 | * per register. Initialization to zeros is sufficient. |
1da177e4 | 784 | */ |
8313524a BM |
785 | gpe_event_info = ACPI_ALLOCATE_ZEROED(((acpi_size) gpe_block-> |
786 | register_count * | |
787 | ACPI_GPE_REGISTER_WIDTH) * | |
788 | sizeof(struct | |
789 | acpi_gpe_event_info)); | |
1da177e4 | 790 | if (!gpe_event_info) { |
b8e4d893 | 791 | ACPI_ERROR((AE_INFO, |
b229cf92 | 792 | "Could not allocate the GpeEventInfo table")); |
1da177e4 LT |
793 | status = AE_NO_MEMORY; |
794 | goto error_exit; | |
795 | } | |
796 | ||
797 | /* Save the new Info arrays in the GPE block */ | |
798 | ||
799 | gpe_block->register_info = gpe_register_info; | |
4be44fcd | 800 | gpe_block->event_info = gpe_event_info; |
1da177e4 LT |
801 | |
802 | /* | |
96db255c | 803 | * Initialize the GPE Register and Event structures. A goal of these |
9f15fc66 BM |
804 | * tables is to hide the fact that there are two separate GPE register |
805 | * sets in a given GPE hardware block, the status registers occupy the | |
806 | * first half, and the enable registers occupy the second half. | |
1da177e4 LT |
807 | */ |
808 | this_register = gpe_register_info; | |
4be44fcd | 809 | this_event = gpe_event_info; |
1da177e4 LT |
810 | |
811 | for (i = 0; i < gpe_block->register_count; i++) { | |
52fc0b02 | 812 | |
1da177e4 LT |
813 | /* Init the register_info for this GPE register (8 GPEs) */ |
814 | ||
4be44fcd LB |
815 | this_register->base_gpe_number = |
816 | (u8) (gpe_block->block_base_number + | |
817 | (i * ACPI_GPE_REGISTER_WIDTH)); | |
818 | ||
59fa8505 BM |
819 | this_register->status_address.address = |
820 | gpe_block->block_address.address + i; | |
4be44fcd | 821 | |
59fa8505 BM |
822 | this_register->enable_address.address = |
823 | gpe_block->block_address.address + i + | |
824 | gpe_block->register_count; | |
4be44fcd | 825 | |
f3d2e786 BM |
826 | this_register->status_address.space_id = |
827 | gpe_block->block_address.space_id; | |
828 | this_register->enable_address.space_id = | |
829 | gpe_block->block_address.space_id; | |
830 | this_register->status_address.bit_width = | |
4be44fcd | 831 | ACPI_GPE_REGISTER_WIDTH; |
f3d2e786 | 832 | this_register->enable_address.bit_width = |
4be44fcd | 833 | ACPI_GPE_REGISTER_WIDTH; |
ecfbbc7b BM |
834 | this_register->status_address.bit_offset = 0; |
835 | this_register->enable_address.bit_offset = 0; | |
1da177e4 LT |
836 | |
837 | /* Init the event_info for each GPE within this register */ | |
838 | ||
839 | for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) { | |
69874165 AS |
840 | this_event->gpe_number = |
841 | (u8) (this_register->base_gpe_number + j); | |
1da177e4 LT |
842 | this_event->register_info = this_register; |
843 | this_event++; | |
844 | } | |
845 | ||
96db255c BM |
846 | /* Disable all GPEs within this register */ |
847 | ||
ecfbbc7b | 848 | status = acpi_write(0x00, &this_register->enable_address); |
4be44fcd | 849 | if (ACPI_FAILURE(status)) { |
1da177e4 LT |
850 | goto error_exit; |
851 | } | |
852 | ||
96db255c BM |
853 | /* Clear any pending GPE events within this register */ |
854 | ||
ecfbbc7b | 855 | status = acpi_write(0xFF, &this_register->status_address); |
4be44fcd | 856 | if (ACPI_FAILURE(status)) { |
1da177e4 LT |
857 | goto error_exit; |
858 | } | |
859 | ||
860 | this_register++; | |
861 | } | |
862 | ||
4be44fcd | 863 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 864 | |
4be44fcd | 865 | error_exit: |
1da177e4 | 866 | if (gpe_register_info) { |
8313524a | 867 | ACPI_FREE(gpe_register_info); |
1da177e4 LT |
868 | } |
869 | if (gpe_event_info) { | |
8313524a | 870 | ACPI_FREE(gpe_event_info); |
1da177e4 LT |
871 | } |
872 | ||
4be44fcd | 873 | return_ACPI_STATUS(status); |
1da177e4 LT |
874 | } |
875 | ||
1da177e4 LT |
876 | /******************************************************************************* |
877 | * | |
878 | * FUNCTION: acpi_ev_create_gpe_block | |
879 | * | |
880 | * PARAMETERS: gpe_device - Handle to the parent GPE block | |
881 | * gpe_block_address - Address and space_iD | |
882 | * register_count - Number of GPE register pairs in the block | |
883 | * gpe_block_base_number - Starting GPE number for the block | |
6f42ccf2 | 884 | * interrupt_number - H/W interrupt for the block |
1da177e4 LT |
885 | * return_gpe_block - Where the new block descriptor is returned |
886 | * | |
887 | * RETURN: Status | |
888 | * | |
96db255c BM |
889 | * DESCRIPTION: Create and Install a block of GPE registers. All GPEs within |
890 | * the block are disabled at exit. | |
891 | * Note: Assumes namespace is locked. | |
1da177e4 LT |
892 | * |
893 | ******************************************************************************/ | |
894 | ||
895 | acpi_status | |
4be44fcd LB |
896 | acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device, |
897 | struct acpi_generic_address *gpe_block_address, | |
898 | u32 register_count, | |
899 | u8 gpe_block_base_number, | |
900 | u32 interrupt_number, | |
901 | struct acpi_gpe_block_info **return_gpe_block) | |
1da177e4 | 902 | { |
4be44fcd | 903 | acpi_status status; |
96db255c | 904 | struct acpi_gpe_block_info *gpe_block; |
1da177e4 | 905 | |
b229cf92 | 906 | ACPI_FUNCTION_TRACE(ev_create_gpe_block); |
1da177e4 LT |
907 | |
908 | if (!register_count) { | |
4be44fcd | 909 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
910 | } |
911 | ||
912 | /* Allocate a new GPE block */ | |
913 | ||
8313524a | 914 | gpe_block = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_block_info)); |
1da177e4 | 915 | if (!gpe_block) { |
4be44fcd | 916 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
917 | } |
918 | ||
919 | /* Initialize the new GPE block */ | |
920 | ||
96db255c | 921 | gpe_block->node = gpe_device; |
1da177e4 LT |
922 | gpe_block->register_count = register_count; |
923 | gpe_block->block_base_number = gpe_block_base_number; | |
1da177e4 | 924 | |
4be44fcd LB |
925 | ACPI_MEMCPY(&gpe_block->block_address, gpe_block_address, |
926 | sizeof(struct acpi_generic_address)); | |
1da177e4 | 927 | |
96db255c BM |
928 | /* |
929 | * Create the register_info and event_info sub-structures | |
930 | * Note: disables and clears all GPEs in the block | |
931 | */ | |
4be44fcd LB |
932 | status = acpi_ev_create_gpe_info_blocks(gpe_block); |
933 | if (ACPI_FAILURE(status)) { | |
8313524a | 934 | ACPI_FREE(gpe_block); |
4be44fcd | 935 | return_ACPI_STATUS(status); |
1da177e4 LT |
936 | } |
937 | ||
96db255c | 938 | /* Install the new block in the global lists */ |
1da177e4 | 939 | |
4be44fcd LB |
940 | status = acpi_ev_install_gpe_block(gpe_block, interrupt_number); |
941 | if (ACPI_FAILURE(status)) { | |
8313524a | 942 | ACPI_FREE(gpe_block); |
4be44fcd | 943 | return_ACPI_STATUS(status); |
1da177e4 LT |
944 | } |
945 | ||
946 | /* Find all GPE methods (_Lxx, _Exx) for this block */ | |
947 | ||
4be44fcd LB |
948 | status = acpi_ns_walk_namespace(ACPI_TYPE_METHOD, gpe_device, |
949 | ACPI_UINT32_MAX, ACPI_NS_WALK_NO_UNLOCK, | |
950 | acpi_ev_save_method_info, gpe_block, | |
951 | NULL); | |
1da177e4 | 952 | |
96db255c BM |
953 | /* Return the new block */ |
954 | ||
955 | if (return_gpe_block) { | |
956 | (*return_gpe_block) = gpe_block; | |
957 | } | |
958 | ||
959 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, | |
960 | "GPE %02X to %02X [%4.4s] %u regs on int 0x%X\n", | |
961 | (u32) gpe_block->block_base_number, | |
962 | (u32) (gpe_block->block_base_number + | |
963 | ((gpe_block->register_count * | |
964 | ACPI_GPE_REGISTER_WIDTH) - 1)), | |
965 | gpe_device->name.ascii, gpe_block->register_count, | |
966 | interrupt_number)); | |
967 | ||
e97d6bf1 BM |
968 | /* Update global count of currently available GPEs */ |
969 | ||
970 | acpi_current_gpe_count += register_count * ACPI_GPE_REGISTER_WIDTH; | |
96db255c BM |
971 | return_ACPI_STATUS(AE_OK); |
972 | } | |
973 | ||
974 | /******************************************************************************* | |
975 | * | |
976 | * FUNCTION: acpi_ev_initialize_gpe_block | |
977 | * | |
978 | * PARAMETERS: gpe_device - Handle to the parent GPE block | |
979 | * gpe_block - Gpe Block info | |
980 | * | |
981 | * RETURN: Status | |
982 | * | |
983 | * DESCRIPTION: Initialize and enable a GPE block. First find and run any | |
984 | * _PRT methods associated with the block, then enable the | |
985 | * appropriate GPEs. | |
986 | * Note: Assumes namespace is locked. | |
987 | * | |
988 | ******************************************************************************/ | |
989 | ||
990 | acpi_status | |
991 | acpi_ev_initialize_gpe_block(struct acpi_namespace_node *gpe_device, | |
992 | struct acpi_gpe_block_info *gpe_block) | |
993 | { | |
994 | acpi_status status; | |
995 | struct acpi_gpe_event_info *gpe_event_info; | |
996 | struct acpi_gpe_walk_info gpe_info; | |
997 | u32 wake_gpe_count; | |
998 | u32 gpe_enabled_count; | |
67a119f9 BM |
999 | u32 i; |
1000 | u32 j; | |
96db255c | 1001 | |
b229cf92 | 1002 | ACPI_FUNCTION_TRACE(ev_initialize_gpe_block); |
96db255c BM |
1003 | |
1004 | /* Ignore a null GPE block (e.g., if no GPE block 1 exists) */ | |
1005 | ||
1006 | if (!gpe_block) { | |
1007 | return_ACPI_STATUS(AE_OK); | |
1008 | } | |
1009 | ||
1da177e4 | 1010 | /* |
96db255c BM |
1011 | * Runtime option: Should wake GPEs be enabled at runtime? The default |
1012 | * is no, they should only be enabled just as the machine goes to sleep. | |
1da177e4 LT |
1013 | */ |
1014 | if (acpi_gbl_leave_wake_gpes_disabled) { | |
1015 | /* | |
96db255c BM |
1016 | * Differentiate runtime vs wake GPEs, via the _PRW control methods. |
1017 | * Each GPE that has one or more _PRWs that reference it is by | |
1018 | * definition a wake GPE and will not be enabled while the machine | |
1019 | * is running. | |
1da177e4 LT |
1020 | */ |
1021 | gpe_info.gpe_block = gpe_block; | |
1022 | gpe_info.gpe_device = gpe_device; | |
1023 | ||
4be44fcd LB |
1024 | status = |
1025 | acpi_ns_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, | |
1026 | ACPI_UINT32_MAX, ACPI_NS_WALK_UNLOCK, | |
1027 | acpi_ev_match_prw_and_gpe, &gpe_info, | |
1028 | NULL); | |
1da177e4 LT |
1029 | } |
1030 | ||
1031 | /* | |
96db255c BM |
1032 | * Enable all GPEs in this block that have these attributes: |
1033 | * 1) are "runtime" or "run/wake" GPEs, and | |
1034 | * 2) have a corresponding _Lxx or _Exx method | |
1035 | * | |
1036 | * Any other GPEs within this block must be enabled via the acpi_enable_gpe() | |
1037 | * external interface. | |
1da177e4 LT |
1038 | */ |
1039 | wake_gpe_count = 0; | |
1040 | gpe_enabled_count = 0; | |
1041 | ||
1042 | for (i = 0; i < gpe_block->register_count; i++) { | |
1043 | for (j = 0; j < 8; j++) { | |
52fc0b02 | 1044 | |
1da177e4 LT |
1045 | /* Get the info block for this particular GPE */ |
1046 | ||
4be44fcd LB |
1047 | gpe_event_info = |
1048 | &gpe_block-> | |
67a119f9 BM |
1049 | event_info[((acpi_size) i * |
1050 | ACPI_GPE_REGISTER_WIDTH) + j]; | |
1da177e4 | 1051 | |
4be44fcd LB |
1052 | if (((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) == |
1053 | ACPI_GPE_DISPATCH_METHOD) | |
fd350943 | 1054 | && (gpe_event_info->flags & ACPI_GPE_TYPE_RUNTIME)) { |
1da177e4 LT |
1055 | gpe_enabled_count++; |
1056 | } | |
1057 | ||
1058 | if (gpe_event_info->flags & ACPI_GPE_TYPE_WAKE) { | |
1059 | wake_gpe_count++; | |
1060 | } | |
1061 | } | |
1062 | } | |
1063 | ||
4be44fcd LB |
1064 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
1065 | "Found %u Wake, Enabled %u Runtime GPEs in this block\n", | |
1066 | wake_gpe_count, gpe_enabled_count)); | |
1da177e4 | 1067 | |
96db255c | 1068 | /* Enable all valid runtime GPEs found above */ |
1da177e4 | 1069 | |
e97d6bf1 | 1070 | status = acpi_hw_enable_runtime_gpe_block(NULL, gpe_block, NULL); |
96db255c | 1071 | if (ACPI_FAILURE(status)) { |
b229cf92 | 1072 | ACPI_ERROR((AE_INFO, "Could not enable GPEs in GpeBlock %p", |
b8e4d893 | 1073 | gpe_block)); |
1da177e4 LT |
1074 | } |
1075 | ||
96db255c | 1076 | return_ACPI_STATUS(status); |
1da177e4 LT |
1077 | } |
1078 | ||
1da177e4 LT |
1079 | /******************************************************************************* |
1080 | * | |
1081 | * FUNCTION: acpi_ev_gpe_initialize | |
1082 | * | |
1083 | * PARAMETERS: None | |
1084 | * | |
1085 | * RETURN: Status | |
1086 | * | |
1087 | * DESCRIPTION: Initialize the GPE data structures | |
1088 | * | |
1089 | ******************************************************************************/ | |
1090 | ||
4be44fcd | 1091 | acpi_status acpi_ev_gpe_initialize(void) |
1da177e4 | 1092 | { |
4be44fcd LB |
1093 | u32 register_count0 = 0; |
1094 | u32 register_count1 = 0; | |
1095 | u32 gpe_number_max = 0; | |
1096 | acpi_status status; | |
1da177e4 | 1097 | |
b229cf92 | 1098 | ACPI_FUNCTION_TRACE(ev_gpe_initialize); |
1da177e4 | 1099 | |
4be44fcd LB |
1100 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
1101 | if (ACPI_FAILURE(status)) { | |
1102 | return_ACPI_STATUS(status); | |
1da177e4 LT |
1103 | } |
1104 | ||
1105 | /* | |
1106 | * Initialize the GPE Block(s) defined in the FADT | |
1107 | * | |
1108 | * Why the GPE register block lengths are divided by 2: From the ACPI Spec, | |
1109 | * section "General-Purpose Event Registers", we have: | |
1110 | * | |
1111 | * "Each register block contains two registers of equal length | |
1112 | * GPEx_STS and GPEx_EN (where x is 0 or 1). The length of the | |
1113 | * GPE0_STS and GPE0_EN registers is equal to half the GPE0_LEN | |
1114 | * The length of the GPE1_STS and GPE1_EN registers is equal to | |
1115 | * half the GPE1_LEN. If a generic register block is not supported | |
1116 | * then its respective block pointer and block length values in the | |
1117 | * FADT table contain zeros. The GPE0_LEN and GPE1_LEN do not need | |
1118 | * to be the same size." | |
1119 | */ | |
1120 | ||
1121 | /* | |
1122 | * Determine the maximum GPE number for this machine. | |
1123 | * | |
1124 | * Note: both GPE0 and GPE1 are optional, and either can exist without | |
1125 | * the other. | |
1126 | * | |
1127 | * If EITHER the register length OR the block address are zero, then that | |
1128 | * particular block is not supported. | |
1129 | */ | |
f3d2e786 BM |
1130 | if (acpi_gbl_FADT.gpe0_block_length && |
1131 | acpi_gbl_FADT.xgpe0_block.address) { | |
52fc0b02 | 1132 | |
1da177e4 LT |
1133 | /* GPE block 0 exists (has both length and address > 0) */ |
1134 | ||
f3d2e786 | 1135 | register_count0 = (u16) (acpi_gbl_FADT.gpe0_block_length / 2); |
1da177e4 | 1136 | |
4be44fcd LB |
1137 | gpe_number_max = |
1138 | (register_count0 * ACPI_GPE_REGISTER_WIDTH) - 1; | |
1da177e4 LT |
1139 | |
1140 | /* Install GPE Block 0 */ | |
1141 | ||
4be44fcd | 1142 | status = acpi_ev_create_gpe_block(acpi_gbl_fadt_gpe_device, |
f3d2e786 | 1143 | &acpi_gbl_FADT.xgpe0_block, |
4be44fcd | 1144 | register_count0, 0, |
f3d2e786 | 1145 | acpi_gbl_FADT.sci_interrupt, |
4be44fcd | 1146 | &acpi_gbl_gpe_fadt_blocks[0]); |
1da177e4 | 1147 | |
4be44fcd | 1148 | if (ACPI_FAILURE(status)) { |
b8e4d893 BM |
1149 | ACPI_EXCEPTION((AE_INFO, status, |
1150 | "Could not create GPE Block 0")); | |
1da177e4 LT |
1151 | } |
1152 | } | |
1153 | ||
f3d2e786 BM |
1154 | if (acpi_gbl_FADT.gpe1_block_length && |
1155 | acpi_gbl_FADT.xgpe1_block.address) { | |
52fc0b02 | 1156 | |
1da177e4 LT |
1157 | /* GPE block 1 exists (has both length and address > 0) */ |
1158 | ||
f3d2e786 | 1159 | register_count1 = (u16) (acpi_gbl_FADT.gpe1_block_length / 2); |
1da177e4 LT |
1160 | |
1161 | /* Check for GPE0/GPE1 overlap (if both banks exist) */ | |
1162 | ||
1163 | if ((register_count0) && | |
f3d2e786 | 1164 | (gpe_number_max >= acpi_gbl_FADT.gpe1_base)) { |
b8e4d893 BM |
1165 | ACPI_ERROR((AE_INFO, |
1166 | "GPE0 block (GPE 0 to %d) overlaps the GPE1 block (GPE %d to %d) - Ignoring GPE1", | |
f3d2e786 BM |
1167 | gpe_number_max, acpi_gbl_FADT.gpe1_base, |
1168 | acpi_gbl_FADT.gpe1_base + | |
b8e4d893 BM |
1169 | ((register_count1 * |
1170 | ACPI_GPE_REGISTER_WIDTH) - 1))); | |
1da177e4 LT |
1171 | |
1172 | /* Ignore GPE1 block by setting the register count to zero */ | |
1173 | ||
1174 | register_count1 = 0; | |
4be44fcd | 1175 | } else { |
1da177e4 LT |
1176 | /* Install GPE Block 1 */ |
1177 | ||
4be44fcd LB |
1178 | status = |
1179 | acpi_ev_create_gpe_block(acpi_gbl_fadt_gpe_device, | |
f3d2e786 | 1180 | &acpi_gbl_FADT.xgpe1_block, |
4be44fcd | 1181 | register_count1, |
f3d2e786 BM |
1182 | acpi_gbl_FADT.gpe1_base, |
1183 | acpi_gbl_FADT. | |
1184 | sci_interrupt, | |
4be44fcd LB |
1185 | &acpi_gbl_gpe_fadt_blocks |
1186 | [1]); | |
1187 | ||
1188 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
1189 | ACPI_EXCEPTION((AE_INFO, status, |
1190 | "Could not create GPE Block 1")); | |
1da177e4 LT |
1191 | } |
1192 | ||
1193 | /* | |
1194 | * GPE0 and GPE1 do not have to be contiguous in the GPE number | |
1195 | * space. However, GPE0 always starts at GPE number zero. | |
1196 | */ | |
f3d2e786 | 1197 | gpe_number_max = acpi_gbl_FADT.gpe1_base + |
4be44fcd | 1198 | ((register_count1 * ACPI_GPE_REGISTER_WIDTH) - 1); |
1da177e4 LT |
1199 | } |
1200 | } | |
1201 | ||
1202 | /* Exit if there are no GPE registers */ | |
1203 | ||
1204 | if ((register_count0 + register_count1) == 0) { | |
52fc0b02 | 1205 | |
1da177e4 LT |
1206 | /* GPEs are not required by ACPI, this is OK */ |
1207 | ||
4be44fcd LB |
1208 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
1209 | "There are no GPE blocks defined in the FADT\n")); | |
1da177e4 LT |
1210 | status = AE_OK; |
1211 | goto cleanup; | |
1212 | } | |
1213 | ||
1214 | /* Check for Max GPE number out-of-range */ | |
1215 | ||
1216 | if (gpe_number_max > ACPI_GPE_MAX) { | |
b8e4d893 BM |
1217 | ACPI_ERROR((AE_INFO, |
1218 | "Maximum GPE number from FADT is too large: 0x%X", | |
1219 | gpe_number_max)); | |
1da177e4 LT |
1220 | status = AE_BAD_VALUE; |
1221 | goto cleanup; | |
1222 | } | |
1223 | ||
4be44fcd LB |
1224 | cleanup: |
1225 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); | |
1226 | return_ACPI_STATUS(AE_OK); | |
1da177e4 | 1227 | } |