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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) && | |
d4913dc6 BM |
107 | (&gpe_block->event_info[((acpi_size) |
108 | gpe_block-> | |
109 | register_count) * 8] > | |
4be44fcd | 110 | gpe_event_info)) { |
1da177e4 LT |
111 | return (TRUE); |
112 | } | |
113 | ||
114 | gpe_block = gpe_block->next; | |
115 | } | |
116 | ||
117 | gpe_xrupt_block = gpe_xrupt_block->next; | |
118 | } | |
119 | ||
120 | return (FALSE); | |
121 | } | |
122 | ||
1da177e4 LT |
123 | /******************************************************************************* |
124 | * | |
125 | * FUNCTION: acpi_ev_walk_gpe_list | |
126 | * | |
127 | * PARAMETERS: gpe_walk_callback - Routine called for each GPE block | |
e97d6bf1 | 128 | * Context - Value passed to callback |
1da177e4 LT |
129 | * |
130 | * RETURN: Status | |
131 | * | |
132 | * DESCRIPTION: Walk the GPE lists. | |
133 | * | |
134 | ******************************************************************************/ | |
135 | ||
e97d6bf1 BM |
136 | acpi_status |
137 | acpi_ev_walk_gpe_list(acpi_gpe_callback gpe_walk_callback, void *context) | |
1da177e4 | 138 | { |
4be44fcd LB |
139 | struct acpi_gpe_block_info *gpe_block; |
140 | struct acpi_gpe_xrupt_info *gpe_xrupt_info; | |
141 | acpi_status status = AE_OK; | |
b8e4d893 | 142 | acpi_cpu_flags flags; |
1da177e4 | 143 | |
b229cf92 | 144 | ACPI_FUNCTION_TRACE(ev_walk_gpe_list); |
1da177e4 | 145 | |
4be44fcd | 146 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
1da177e4 LT |
147 | |
148 | /* Walk the interrupt level descriptor list */ | |
149 | ||
150 | gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head; | |
151 | while (gpe_xrupt_info) { | |
52fc0b02 | 152 | |
1da177e4 LT |
153 | /* Walk all Gpe Blocks attached to this interrupt level */ |
154 | ||
155 | gpe_block = gpe_xrupt_info->gpe_block_list_head; | |
156 | while (gpe_block) { | |
52fc0b02 | 157 | |
1da177e4 LT |
158 | /* One callback per GPE block */ |
159 | ||
e97d6bf1 BM |
160 | status = |
161 | gpe_walk_callback(gpe_xrupt_info, gpe_block, | |
162 | context); | |
4be44fcd | 163 | if (ACPI_FAILURE(status)) { |
e97d6bf1 BM |
164 | if (status == AE_CTRL_END) { /* Callback abort */ |
165 | status = AE_OK; | |
166 | } | |
1da177e4 LT |
167 | goto unlock_and_exit; |
168 | } | |
169 | ||
170 | gpe_block = gpe_block->next; | |
171 | } | |
172 | ||
173 | gpe_xrupt_info = gpe_xrupt_info->next; | |
174 | } | |
175 | ||
4be44fcd LB |
176 | unlock_and_exit: |
177 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); | |
178 | return_ACPI_STATUS(status); | |
1da177e4 LT |
179 | } |
180 | ||
44f6c012 | 181 | /******************************************************************************* |
1da177e4 LT |
182 | * |
183 | * FUNCTION: acpi_ev_delete_gpe_handlers | |
184 | * | |
185 | * PARAMETERS: gpe_xrupt_info - GPE Interrupt info | |
186 | * gpe_block - Gpe Block info | |
187 | * | |
188 | * RETURN: Status | |
189 | * | |
190 | * DESCRIPTION: Delete all Handler objects found in the GPE data structs. | |
191 | * Used only prior to termination. | |
192 | * | |
193 | ******************************************************************************/ | |
194 | ||
195 | acpi_status | |
4be44fcd | 196 | acpi_ev_delete_gpe_handlers(struct acpi_gpe_xrupt_info *gpe_xrupt_info, |
e97d6bf1 BM |
197 | struct acpi_gpe_block_info *gpe_block, |
198 | void *context) | |
1da177e4 | 199 | { |
4be44fcd | 200 | struct acpi_gpe_event_info *gpe_event_info; |
67a119f9 BM |
201 | u32 i; |
202 | u32 j; | |
1da177e4 | 203 | |
b229cf92 | 204 | ACPI_FUNCTION_TRACE(ev_delete_gpe_handlers); |
1da177e4 LT |
205 | |
206 | /* Examine each GPE Register within the block */ | |
207 | ||
208 | for (i = 0; i < gpe_block->register_count; i++) { | |
52fc0b02 | 209 | |
1da177e4 LT |
210 | /* Now look at the individual GPEs in this byte register */ |
211 | ||
212 | for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) { | |
d4913dc6 BM |
213 | gpe_event_info = &gpe_block->event_info[((acpi_size) i * |
214 | ACPI_GPE_REGISTER_WIDTH) | |
215 | + j]; | |
1da177e4 | 216 | |
44f6c012 | 217 | if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) == |
4be44fcd | 218 | ACPI_GPE_DISPATCH_HANDLER) { |
8313524a | 219 | ACPI_FREE(gpe_event_info->dispatch.handler); |
1da177e4 | 220 | gpe_event_info->dispatch.handler = NULL; |
4be44fcd LB |
221 | gpe_event_info->flags &= |
222 | ~ACPI_GPE_DISPATCH_MASK; | |
1da177e4 LT |
223 | } |
224 | } | |
225 | } | |
226 | ||
4be44fcd | 227 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
228 | } |
229 | ||
1da177e4 LT |
230 | /******************************************************************************* |
231 | * | |
232 | * FUNCTION: acpi_ev_save_method_info | |
233 | * | |
234 | * PARAMETERS: Callback from walk_namespace | |
235 | * | |
236 | * RETURN: Status | |
237 | * | |
238 | * DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a | |
239 | * control method under the _GPE portion of the namespace. | |
240 | * Extract the name and GPE type from the object, saving this | |
241 | * information for quick lookup during GPE dispatch | |
242 | * | |
243 | * The name of each GPE control method is of the form: | |
244 | * "_Lxx" or "_Exx" | |
245 | * Where: | |
246 | * L - means that the GPE is level triggered | |
247 | * E - means that the GPE is edge triggered | |
248 | * xx - is the GPE number [in HEX] | |
249 | * | |
250 | ******************************************************************************/ | |
251 | ||
252 | static acpi_status | |
4be44fcd LB |
253 | acpi_ev_save_method_info(acpi_handle obj_handle, |
254 | u32 level, void *obj_desc, void **return_value) | |
1da177e4 | 255 | { |
4be44fcd LB |
256 | struct acpi_gpe_block_info *gpe_block = (void *)obj_desc; |
257 | struct acpi_gpe_event_info *gpe_event_info; | |
258 | u32 gpe_number; | |
259 | char name[ACPI_NAME_SIZE + 1]; | |
260 | u8 type; | |
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 | 294 | ACPI_DEBUG_PRINT((ACPI_DB_LOAD, |
d4913dc6 BM |
295 | "Ignoring unknown GPE method type: %s " |
296 | "(name not of form _Lxx or _Exx)", 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 | 307 | ACPI_DEBUG_PRINT((ACPI_DB_LOAD, |
d4913dc6 BM |
308 | "Could not extract GPE number from name: %s " |
309 | "(name is not of form _Lxx or _Exx)", 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) || | |
d4913dc6 BM |
316 | (gpe_number >= (gpe_block->block_base_number + |
317 | (gpe_block->register_count * 8)))) { | |
1da177e4 | 318 | /* |
9f15fc66 BM |
319 | * Not valid for this GPE block, just ignore it. However, it may be |
320 | * valid for a different GPE block, since GPE0 and GPE1 methods both | |
321 | * appear under \_GPE. | |
1da177e4 | 322 | */ |
4be44fcd | 323 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
324 | } |
325 | ||
326 | /* | |
9f15fc66 BM |
327 | * Now we can add this information to the gpe_event_info block for use |
328 | * during dispatch of this GPE. Default type is RUNTIME, although this may | |
329 | * change when the _PRW methods are executed later. | |
1da177e4 | 330 | */ |
4be44fcd LB |
331 | gpe_event_info = |
332 | &gpe_block->event_info[gpe_number - gpe_block->block_base_number]; | |
1da177e4 | 333 | |
96db255c BM |
334 | gpe_event_info->flags = (u8) |
335 | (type | ACPI_GPE_DISPATCH_METHOD | ACPI_GPE_TYPE_RUNTIME); | |
1da177e4 | 336 | |
4be44fcd LB |
337 | gpe_event_info->dispatch.method_node = |
338 | (struct acpi_namespace_node *)obj_handle; | |
1da177e4 LT |
339 | |
340 | /* Update enable mask, but don't enable the HW GPE as of yet */ | |
341 | ||
4be44fcd | 342 | status = acpi_ev_enable_gpe(gpe_event_info, FALSE); |
1da177e4 | 343 | |
4be44fcd LB |
344 | ACPI_DEBUG_PRINT((ACPI_DB_LOAD, |
345 | "Registered GPE method %s as GPE number 0x%.2X\n", | |
346 | name, gpe_number)); | |
347 | return_ACPI_STATUS(status); | |
1da177e4 LT |
348 | } |
349 | ||
1da177e4 LT |
350 | /******************************************************************************* |
351 | * | |
352 | * FUNCTION: acpi_ev_match_prw_and_gpe | |
353 | * | |
354 | * PARAMETERS: Callback from walk_namespace | |
355 | * | |
96db255c | 356 | * RETURN: Status. NOTE: We ignore errors so that the _PRW walk is |
1da177e4 LT |
357 | * not aborted on a single _PRW failure. |
358 | * | |
359 | * DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a | |
96db255c | 360 | * Device. Run the _PRW method. If present, extract the GPE |
1da177e4 LT |
361 | * number and mark the GPE as a WAKE GPE. |
362 | * | |
363 | ******************************************************************************/ | |
364 | ||
365 | static acpi_status | |
4be44fcd LB |
366 | acpi_ev_match_prw_and_gpe(acpi_handle obj_handle, |
367 | u32 level, void *info, void **return_value) | |
1da177e4 | 368 | { |
4be44fcd LB |
369 | struct acpi_gpe_walk_info *gpe_info = (void *)info; |
370 | struct acpi_namespace_node *gpe_device; | |
371 | struct acpi_gpe_block_info *gpe_block; | |
372 | struct acpi_namespace_node *target_gpe_device; | |
373 | struct acpi_gpe_event_info *gpe_event_info; | |
374 | union acpi_operand_object *pkg_desc; | |
375 | union acpi_operand_object *obj_desc; | |
376 | u32 gpe_number; | |
377 | acpi_status status; | |
378 | ||
b229cf92 | 379 | ACPI_FUNCTION_TRACE(ev_match_prw_and_gpe); |
1da177e4 LT |
380 | |
381 | /* Check for a _PRW method under this device */ | |
382 | ||
4be44fcd LB |
383 | status = acpi_ut_evaluate_object(obj_handle, METHOD_NAME__PRW, |
384 | ACPI_BTYPE_PACKAGE, &pkg_desc); | |
385 | if (ACPI_FAILURE(status)) { | |
52fc0b02 | 386 | |
1da177e4 LT |
387 | /* Ignore all errors from _PRW, we don't want to abort the subsystem */ |
388 | ||
4be44fcd | 389 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
390 | } |
391 | ||
392 | /* The returned _PRW package must have at least two elements */ | |
393 | ||
394 | if (pkg_desc->package.count < 2) { | |
395 | goto cleanup; | |
396 | } | |
397 | ||
398 | /* Extract pointers from the input context */ | |
399 | ||
400 | gpe_device = gpe_info->gpe_device; | |
401 | gpe_block = gpe_info->gpe_block; | |
402 | ||
403 | /* | |
9f15fc66 BM |
404 | * The _PRW object must return a package, we are only interested in the |
405 | * first element | |
1da177e4 LT |
406 | */ |
407 | obj_desc = pkg_desc->package.elements[0]; | |
408 | ||
3371c19c | 409 | if (obj_desc->common.type == ACPI_TYPE_INTEGER) { |
52fc0b02 | 410 | |
1da177e4 LT |
411 | /* Use FADT-defined GPE device (from definition of _PRW) */ |
412 | ||
413 | target_gpe_device = acpi_gbl_fadt_gpe_device; | |
414 | ||
415 | /* Integer is the GPE number in the FADT described GPE blocks */ | |
416 | ||
417 | gpe_number = (u32) obj_desc->integer.value; | |
3371c19c | 418 | } else if (obj_desc->common.type == ACPI_TYPE_PACKAGE) { |
52fc0b02 | 419 | |
1da177e4 LT |
420 | /* Package contains a GPE reference and GPE number within a GPE block */ |
421 | ||
422 | if ((obj_desc->package.count < 2) || | |
3371c19c | 423 | ((obj_desc->package.elements[0])->common.type != |
d4913dc6 BM |
424 | ACPI_TYPE_LOCAL_REFERENCE) || |
425 | ((obj_desc->package.elements[1])->common.type != | |
426 | ACPI_TYPE_INTEGER)) { | |
1da177e4 LT |
427 | goto cleanup; |
428 | } | |
429 | ||
430 | /* Get GPE block reference and decode */ | |
431 | ||
4be44fcd LB |
432 | target_gpe_device = |
433 | obj_desc->package.elements[0]->reference.node; | |
1da177e4 | 434 | gpe_number = (u32) obj_desc->package.elements[1]->integer.value; |
4be44fcd | 435 | } else { |
1da177e4 LT |
436 | /* Unknown type, just ignore it */ |
437 | ||
438 | goto cleanup; | |
439 | } | |
440 | ||
441 | /* | |
442 | * Is this GPE within this block? | |
443 | * | |
9f15fc66 | 444 | * TRUE if and only if these conditions are true: |
1da177e4 LT |
445 | * 1) The GPE devices match. |
446 | * 2) The GPE index(number) is within the range of the Gpe Block | |
447 | * associated with the GPE device. | |
448 | */ | |
449 | if ((gpe_device == target_gpe_device) && | |
4be44fcd | 450 | (gpe_number >= gpe_block->block_base_number) && |
d4913dc6 BM |
451 | (gpe_number < gpe_block->block_base_number + |
452 | (gpe_block->register_count * 8))) { | |
453 | gpe_event_info = &gpe_block->event_info[gpe_number - | |
454 | gpe_block-> | |
455 | block_base_number]; | |
1da177e4 LT |
456 | |
457 | /* Mark GPE for WAKE-ONLY but WAKE_DISABLED */ | |
458 | ||
4be44fcd LB |
459 | gpe_event_info->flags &= |
460 | ~(ACPI_GPE_WAKE_ENABLED | ACPI_GPE_RUN_ENABLED); | |
96db255c | 461 | |
4be44fcd LB |
462 | status = |
463 | acpi_ev_set_gpe_type(gpe_event_info, ACPI_GPE_TYPE_WAKE); | |
464 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
465 | goto cleanup; |
466 | } | |
9f15fc66 | 467 | |
4be44fcd LB |
468 | status = |
469 | acpi_ev_update_gpe_enable_masks(gpe_event_info, | |
470 | ACPI_GPE_DISABLE); | |
1da177e4 LT |
471 | } |
472 | ||
4be44fcd LB |
473 | cleanup: |
474 | acpi_ut_remove_reference(pkg_desc); | |
475 | return_ACPI_STATUS(AE_OK); | |
1da177e4 LT |
476 | } |
477 | ||
1da177e4 LT |
478 | /******************************************************************************* |
479 | * | |
480 | * FUNCTION: acpi_ev_get_gpe_xrupt_block | |
481 | * | |
6f42ccf2 | 482 | * PARAMETERS: interrupt_number - Interrupt for a GPE block |
1da177e4 LT |
483 | * |
484 | * RETURN: A GPE interrupt block | |
485 | * | |
96db255c | 486 | * DESCRIPTION: Get or Create a GPE interrupt block. There is one interrupt |
9f15fc66 BM |
487 | * block per unique interrupt level used for GPEs. Should be |
488 | * called only when the GPE lists are semaphore locked and not | |
489 | * subject to change. | |
1da177e4 LT |
490 | * |
491 | ******************************************************************************/ | |
492 | ||
4be44fcd LB |
493 | static struct acpi_gpe_xrupt_info *acpi_ev_get_gpe_xrupt_block(u32 |
494 | interrupt_number) | |
1da177e4 | 495 | { |
4be44fcd LB |
496 | struct acpi_gpe_xrupt_info *next_gpe_xrupt; |
497 | struct acpi_gpe_xrupt_info *gpe_xrupt; | |
498 | acpi_status status; | |
b8e4d893 | 499 | acpi_cpu_flags flags; |
1da177e4 | 500 | |
b229cf92 | 501 | ACPI_FUNCTION_TRACE(ev_get_gpe_xrupt_block); |
1da177e4 | 502 | |
44f6c012 | 503 | /* No need for lock since we are not changing any list elements here */ |
1da177e4 LT |
504 | |
505 | next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head; | |
506 | while (next_gpe_xrupt) { | |
6f42ccf2 | 507 | if (next_gpe_xrupt->interrupt_number == interrupt_number) { |
4be44fcd | 508 | return_PTR(next_gpe_xrupt); |
1da177e4 LT |
509 | } |
510 | ||
511 | next_gpe_xrupt = next_gpe_xrupt->next; | |
512 | } | |
513 | ||
514 | /* Not found, must allocate a new xrupt descriptor */ | |
515 | ||
8313524a | 516 | gpe_xrupt = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_xrupt_info)); |
1da177e4 | 517 | if (!gpe_xrupt) { |
4be44fcd | 518 | return_PTR(NULL); |
1da177e4 LT |
519 | } |
520 | ||
6f42ccf2 | 521 | gpe_xrupt->interrupt_number = interrupt_number; |
1da177e4 LT |
522 | |
523 | /* Install new interrupt descriptor with spin lock */ | |
524 | ||
4be44fcd | 525 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
1da177e4 LT |
526 | if (acpi_gbl_gpe_xrupt_list_head) { |
527 | next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head; | |
528 | while (next_gpe_xrupt->next) { | |
529 | next_gpe_xrupt = next_gpe_xrupt->next; | |
530 | } | |
531 | ||
532 | next_gpe_xrupt->next = gpe_xrupt; | |
533 | gpe_xrupt->previous = next_gpe_xrupt; | |
4be44fcd | 534 | } else { |
1da177e4 LT |
535 | acpi_gbl_gpe_xrupt_list_head = gpe_xrupt; |
536 | } | |
4be44fcd | 537 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
1da177e4 LT |
538 | |
539 | /* Install new interrupt handler if not SCI_INT */ | |
540 | ||
f3d2e786 | 541 | if (interrupt_number != acpi_gbl_FADT.sci_interrupt) { |
4be44fcd LB |
542 | status = acpi_os_install_interrupt_handler(interrupt_number, |
543 | acpi_ev_gpe_xrupt_handler, | |
544 | gpe_xrupt); | |
545 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
546 | ACPI_ERROR((AE_INFO, |
547 | "Could not install GPE interrupt handler at level 0x%X", | |
548 | interrupt_number)); | |
4be44fcd | 549 | return_PTR(NULL); |
1da177e4 LT |
550 | } |
551 | } | |
552 | ||
4be44fcd | 553 | return_PTR(gpe_xrupt); |
1da177e4 LT |
554 | } |
555 | ||
1da177e4 LT |
556 | /******************************************************************************* |
557 | * | |
558 | * FUNCTION: acpi_ev_delete_gpe_xrupt | |
559 | * | |
560 | * PARAMETERS: gpe_xrupt - A GPE interrupt info block | |
561 | * | |
562 | * RETURN: Status | |
563 | * | |
564 | * DESCRIPTION: Remove and free a gpe_xrupt block. Remove an associated | |
565 | * interrupt handler if not the SCI interrupt. | |
566 | * | |
567 | ******************************************************************************/ | |
568 | ||
569 | static acpi_status | |
4be44fcd | 570 | acpi_ev_delete_gpe_xrupt(struct acpi_gpe_xrupt_info *gpe_xrupt) |
1da177e4 | 571 | { |
4be44fcd | 572 | acpi_status status; |
b8e4d893 | 573 | acpi_cpu_flags flags; |
1da177e4 | 574 | |
b229cf92 | 575 | ACPI_FUNCTION_TRACE(ev_delete_gpe_xrupt); |
1da177e4 LT |
576 | |
577 | /* We never want to remove the SCI interrupt handler */ | |
578 | ||
f3d2e786 | 579 | if (gpe_xrupt->interrupt_number == acpi_gbl_FADT.sci_interrupt) { |
1da177e4 | 580 | gpe_xrupt->gpe_block_list_head = NULL; |
4be44fcd | 581 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
582 | } |
583 | ||
584 | /* Disable this interrupt */ | |
585 | ||
96db255c BM |
586 | status = |
587 | acpi_os_remove_interrupt_handler(gpe_xrupt->interrupt_number, | |
588 | acpi_ev_gpe_xrupt_handler); | |
4be44fcd LB |
589 | if (ACPI_FAILURE(status)) { |
590 | return_ACPI_STATUS(status); | |
1da177e4 LT |
591 | } |
592 | ||
593 | /* Unlink the interrupt block with lock */ | |
594 | ||
4be44fcd | 595 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
1da177e4 LT |
596 | if (gpe_xrupt->previous) { |
597 | gpe_xrupt->previous->next = gpe_xrupt->next; | |
e0b91050 BM |
598 | } else { |
599 | /* No previous, update list head */ | |
600 | ||
601 | acpi_gbl_gpe_xrupt_list_head = gpe_xrupt->next; | |
1da177e4 LT |
602 | } |
603 | ||
604 | if (gpe_xrupt->next) { | |
605 | gpe_xrupt->next->previous = gpe_xrupt->previous; | |
606 | } | |
4be44fcd | 607 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
1da177e4 LT |
608 | |
609 | /* Free the block */ | |
610 | ||
8313524a | 611 | ACPI_FREE(gpe_xrupt); |
4be44fcd | 612 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
613 | } |
614 | ||
1da177e4 LT |
615 | /******************************************************************************* |
616 | * | |
617 | * FUNCTION: acpi_ev_install_gpe_block | |
618 | * | |
9f15fc66 BM |
619 | * PARAMETERS: gpe_block - New GPE block |
620 | * interrupt_number - Xrupt to be associated with this | |
621 | * GPE block | |
1da177e4 LT |
622 | * |
623 | * RETURN: Status | |
624 | * | |
625 | * DESCRIPTION: Install new GPE block with mutex support | |
626 | * | |
627 | ******************************************************************************/ | |
628 | ||
629 | static acpi_status | |
4be44fcd LB |
630 | acpi_ev_install_gpe_block(struct acpi_gpe_block_info *gpe_block, |
631 | u32 interrupt_number) | |
1da177e4 | 632 | { |
4be44fcd LB |
633 | struct acpi_gpe_block_info *next_gpe_block; |
634 | struct acpi_gpe_xrupt_info *gpe_xrupt_block; | |
635 | acpi_status status; | |
b8e4d893 | 636 | acpi_cpu_flags flags; |
1da177e4 | 637 | |
b229cf92 | 638 | ACPI_FUNCTION_TRACE(ev_install_gpe_block); |
1da177e4 | 639 | |
4be44fcd LB |
640 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
641 | if (ACPI_FAILURE(status)) { | |
642 | return_ACPI_STATUS(status); | |
1da177e4 LT |
643 | } |
644 | ||
4be44fcd | 645 | gpe_xrupt_block = acpi_ev_get_gpe_xrupt_block(interrupt_number); |
1da177e4 LT |
646 | if (!gpe_xrupt_block) { |
647 | status = AE_NO_MEMORY; | |
648 | goto unlock_and_exit; | |
649 | } | |
650 | ||
44f6c012 | 651 | /* Install the new block at the end of the list with lock */ |
1da177e4 | 652 | |
4be44fcd | 653 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
1da177e4 LT |
654 | if (gpe_xrupt_block->gpe_block_list_head) { |
655 | next_gpe_block = gpe_xrupt_block->gpe_block_list_head; | |
656 | while (next_gpe_block->next) { | |
657 | next_gpe_block = next_gpe_block->next; | |
658 | } | |
659 | ||
660 | next_gpe_block->next = gpe_block; | |
661 | gpe_block->previous = next_gpe_block; | |
4be44fcd | 662 | } else { |
1da177e4 LT |
663 | gpe_xrupt_block->gpe_block_list_head = gpe_block; |
664 | } | |
665 | ||
666 | gpe_block->xrupt_block = gpe_xrupt_block; | |
4be44fcd | 667 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
1da177e4 | 668 | |
4be44fcd LB |
669 | unlock_and_exit: |
670 | status = acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
671 | return_ACPI_STATUS(status); | |
1da177e4 LT |
672 | } |
673 | ||
1da177e4 LT |
674 | /******************************************************************************* |
675 | * | |
676 | * FUNCTION: acpi_ev_delete_gpe_block | |
677 | * | |
9f15fc66 | 678 | * PARAMETERS: gpe_block - Existing GPE block |
1da177e4 LT |
679 | * |
680 | * RETURN: Status | |
681 | * | |
682 | * DESCRIPTION: Remove a GPE block | |
683 | * | |
684 | ******************************************************************************/ | |
685 | ||
4be44fcd | 686 | acpi_status acpi_ev_delete_gpe_block(struct acpi_gpe_block_info *gpe_block) |
1da177e4 | 687 | { |
4be44fcd | 688 | acpi_status status; |
b8e4d893 | 689 | acpi_cpu_flags flags; |
1da177e4 | 690 | |
b229cf92 | 691 | ACPI_FUNCTION_TRACE(ev_install_gpe_block); |
1da177e4 | 692 | |
4be44fcd LB |
693 | status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); |
694 | if (ACPI_FAILURE(status)) { | |
695 | return_ACPI_STATUS(status); | |
1da177e4 LT |
696 | } |
697 | ||
698 | /* Disable all GPEs in this block */ | |
699 | ||
e97d6bf1 BM |
700 | status = |
701 | acpi_hw_disable_gpe_block(gpe_block->xrupt_block, gpe_block, NULL); | |
1da177e4 LT |
702 | |
703 | if (!gpe_block->previous && !gpe_block->next) { | |
52fc0b02 | 704 | |
1da177e4 LT |
705 | /* This is the last gpe_block on this interrupt */ |
706 | ||
4be44fcd LB |
707 | status = acpi_ev_delete_gpe_xrupt(gpe_block->xrupt_block); |
708 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
709 | goto unlock_and_exit; |
710 | } | |
4be44fcd | 711 | } else { |
1da177e4 LT |
712 | /* Remove the block on this interrupt with lock */ |
713 | ||
4be44fcd | 714 | flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
1da177e4 LT |
715 | if (gpe_block->previous) { |
716 | gpe_block->previous->next = gpe_block->next; | |
4be44fcd LB |
717 | } else { |
718 | gpe_block->xrupt_block->gpe_block_list_head = | |
719 | gpe_block->next; | |
1da177e4 LT |
720 | } |
721 | ||
722 | if (gpe_block->next) { | |
723 | gpe_block->next->previous = gpe_block->previous; | |
724 | } | |
4be44fcd | 725 | acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
1da177e4 LT |
726 | } |
727 | ||
e97d6bf1 BM |
728 | acpi_current_gpe_count -= |
729 | gpe_block->register_count * ACPI_GPE_REGISTER_WIDTH; | |
730 | ||
1da177e4 LT |
731 | /* Free the gpe_block */ |
732 | ||
8313524a BM |
733 | ACPI_FREE(gpe_block->register_info); |
734 | ACPI_FREE(gpe_block->event_info); | |
735 | ACPI_FREE(gpe_block); | |
1da177e4 | 736 | |
4be44fcd LB |
737 | unlock_and_exit: |
738 | status = acpi_ut_release_mutex(ACPI_MTX_EVENTS); | |
739 | return_ACPI_STATUS(status); | |
1da177e4 LT |
740 | } |
741 | ||
1da177e4 LT |
742 | /******************************************************************************* |
743 | * | |
744 | * FUNCTION: acpi_ev_create_gpe_info_blocks | |
745 | * | |
746 | * PARAMETERS: gpe_block - New GPE block | |
747 | * | |
748 | * RETURN: Status | |
749 | * | |
750 | * DESCRIPTION: Create the register_info and event_info blocks for this GPE block | |
751 | * | |
752 | ******************************************************************************/ | |
753 | ||
754 | static acpi_status | |
4be44fcd | 755 | acpi_ev_create_gpe_info_blocks(struct acpi_gpe_block_info *gpe_block) |
1da177e4 | 756 | { |
4be44fcd LB |
757 | struct acpi_gpe_register_info *gpe_register_info = NULL; |
758 | struct acpi_gpe_event_info *gpe_event_info = NULL; | |
759 | struct acpi_gpe_event_info *this_event; | |
760 | struct acpi_gpe_register_info *this_register; | |
67a119f9 BM |
761 | u32 i; |
762 | u32 j; | |
4be44fcd | 763 | acpi_status status; |
1da177e4 | 764 | |
b229cf92 | 765 | ACPI_FUNCTION_TRACE(ev_create_gpe_info_blocks); |
1da177e4 LT |
766 | |
767 | /* Allocate the GPE register information block */ | |
768 | ||
8313524a BM |
769 | gpe_register_info = ACPI_ALLOCATE_ZEROED((acpi_size) gpe_block-> |
770 | register_count * | |
771 | sizeof(struct | |
772 | acpi_gpe_register_info)); | |
1da177e4 | 773 | if (!gpe_register_info) { |
b8e4d893 | 774 | ACPI_ERROR((AE_INFO, |
b229cf92 | 775 | "Could not allocate the GpeRegisterInfo table")); |
4be44fcd | 776 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
777 | } |
778 | ||
779 | /* | |
780 | * Allocate the GPE event_info block. There are eight distinct GPEs | |
96db255c | 781 | * per register. Initialization to zeros is sufficient. |
1da177e4 | 782 | */ |
8313524a BM |
783 | gpe_event_info = ACPI_ALLOCATE_ZEROED(((acpi_size) gpe_block-> |
784 | register_count * | |
785 | ACPI_GPE_REGISTER_WIDTH) * | |
786 | sizeof(struct | |
787 | acpi_gpe_event_info)); | |
1da177e4 | 788 | if (!gpe_event_info) { |
b8e4d893 | 789 | ACPI_ERROR((AE_INFO, |
b229cf92 | 790 | "Could not allocate the GpeEventInfo table")); |
1da177e4 LT |
791 | status = AE_NO_MEMORY; |
792 | goto error_exit; | |
793 | } | |
794 | ||
795 | /* Save the new Info arrays in the GPE block */ | |
796 | ||
797 | gpe_block->register_info = gpe_register_info; | |
4be44fcd | 798 | gpe_block->event_info = gpe_event_info; |
1da177e4 LT |
799 | |
800 | /* | |
96db255c | 801 | * Initialize the GPE Register and Event structures. A goal of these |
9f15fc66 BM |
802 | * tables is to hide the fact that there are two separate GPE register |
803 | * sets in a given GPE hardware block, the status registers occupy the | |
804 | * first half, and the enable registers occupy the second half. | |
1da177e4 LT |
805 | */ |
806 | this_register = gpe_register_info; | |
4be44fcd | 807 | this_event = gpe_event_info; |
1da177e4 LT |
808 | |
809 | for (i = 0; i < gpe_block->register_count; i++) { | |
52fc0b02 | 810 | |
1da177e4 LT |
811 | /* Init the register_info for this GPE register (8 GPEs) */ |
812 | ||
4be44fcd LB |
813 | this_register->base_gpe_number = |
814 | (u8) (gpe_block->block_base_number + | |
815 | (i * ACPI_GPE_REGISTER_WIDTH)); | |
816 | ||
59fa8505 BM |
817 | this_register->status_address.address = |
818 | gpe_block->block_address.address + i; | |
4be44fcd | 819 | |
59fa8505 BM |
820 | this_register->enable_address.address = |
821 | gpe_block->block_address.address + i + | |
822 | gpe_block->register_count; | |
4be44fcd | 823 | |
f3d2e786 BM |
824 | this_register->status_address.space_id = |
825 | gpe_block->block_address.space_id; | |
826 | this_register->enable_address.space_id = | |
827 | gpe_block->block_address.space_id; | |
828 | this_register->status_address.bit_width = | |
4be44fcd | 829 | ACPI_GPE_REGISTER_WIDTH; |
f3d2e786 | 830 | this_register->enable_address.bit_width = |
4be44fcd | 831 | ACPI_GPE_REGISTER_WIDTH; |
ecfbbc7b BM |
832 | this_register->status_address.bit_offset = 0; |
833 | this_register->enable_address.bit_offset = 0; | |
1da177e4 LT |
834 | |
835 | /* Init the event_info for each GPE within this register */ | |
836 | ||
837 | for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) { | |
69874165 AS |
838 | this_event->gpe_number = |
839 | (u8) (this_register->base_gpe_number + j); | |
1da177e4 LT |
840 | this_event->register_info = this_register; |
841 | this_event++; | |
842 | } | |
843 | ||
96db255c BM |
844 | /* Disable all GPEs within this register */ |
845 | ||
c6b5774c | 846 | status = acpi_hw_write(0x00, &this_register->enable_address); |
4be44fcd | 847 | if (ACPI_FAILURE(status)) { |
1da177e4 LT |
848 | goto error_exit; |
849 | } | |
850 | ||
96db255c BM |
851 | /* Clear any pending GPE events within this register */ |
852 | ||
c6b5774c | 853 | status = acpi_hw_write(0xFF, &this_register->status_address); |
4be44fcd | 854 | if (ACPI_FAILURE(status)) { |
1da177e4 LT |
855 | goto error_exit; |
856 | } | |
857 | ||
858 | this_register++; | |
859 | } | |
860 | ||
4be44fcd | 861 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 862 | |
4be44fcd | 863 | error_exit: |
1da177e4 | 864 | if (gpe_register_info) { |
8313524a | 865 | ACPI_FREE(gpe_register_info); |
1da177e4 LT |
866 | } |
867 | if (gpe_event_info) { | |
8313524a | 868 | ACPI_FREE(gpe_event_info); |
1da177e4 LT |
869 | } |
870 | ||
4be44fcd | 871 | return_ACPI_STATUS(status); |
1da177e4 LT |
872 | } |
873 | ||
1da177e4 LT |
874 | /******************************************************************************* |
875 | * | |
876 | * FUNCTION: acpi_ev_create_gpe_block | |
877 | * | |
878 | * PARAMETERS: gpe_device - Handle to the parent GPE block | |
879 | * gpe_block_address - Address and space_iD | |
880 | * register_count - Number of GPE register pairs in the block | |
881 | * gpe_block_base_number - Starting GPE number for the block | |
6f42ccf2 | 882 | * interrupt_number - H/W interrupt for the block |
1da177e4 LT |
883 | * return_gpe_block - Where the new block descriptor is returned |
884 | * | |
885 | * RETURN: Status | |
886 | * | |
96db255c BM |
887 | * DESCRIPTION: Create and Install a block of GPE registers. All GPEs within |
888 | * the block are disabled at exit. | |
889 | * Note: Assumes namespace is locked. | |
1da177e4 LT |
890 | * |
891 | ******************************************************************************/ | |
892 | ||
893 | acpi_status | |
4be44fcd LB |
894 | acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device, |
895 | struct acpi_generic_address *gpe_block_address, | |
896 | u32 register_count, | |
897 | u8 gpe_block_base_number, | |
898 | u32 interrupt_number, | |
899 | struct acpi_gpe_block_info **return_gpe_block) | |
1da177e4 | 900 | { |
4be44fcd | 901 | acpi_status status; |
96db255c | 902 | struct acpi_gpe_block_info *gpe_block; |
1da177e4 | 903 | |
b229cf92 | 904 | ACPI_FUNCTION_TRACE(ev_create_gpe_block); |
1da177e4 LT |
905 | |
906 | if (!register_count) { | |
4be44fcd | 907 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
908 | } |
909 | ||
910 | /* Allocate a new GPE block */ | |
911 | ||
8313524a | 912 | gpe_block = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_block_info)); |
1da177e4 | 913 | if (!gpe_block) { |
4be44fcd | 914 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
915 | } |
916 | ||
917 | /* Initialize the new GPE block */ | |
918 | ||
96db255c | 919 | gpe_block->node = gpe_device; |
1da177e4 LT |
920 | gpe_block->register_count = register_count; |
921 | gpe_block->block_base_number = gpe_block_base_number; | |
1da177e4 | 922 | |
4be44fcd LB |
923 | ACPI_MEMCPY(&gpe_block->block_address, gpe_block_address, |
924 | sizeof(struct acpi_generic_address)); | |
1da177e4 | 925 | |
96db255c BM |
926 | /* |
927 | * Create the register_info and event_info sub-structures | |
928 | * Note: disables and clears all GPEs in the block | |
929 | */ | |
4be44fcd LB |
930 | status = acpi_ev_create_gpe_info_blocks(gpe_block); |
931 | if (ACPI_FAILURE(status)) { | |
8313524a | 932 | ACPI_FREE(gpe_block); |
4be44fcd | 933 | return_ACPI_STATUS(status); |
1da177e4 LT |
934 | } |
935 | ||
96db255c | 936 | /* Install the new block in the global lists */ |
1da177e4 | 937 | |
4be44fcd LB |
938 | status = acpi_ev_install_gpe_block(gpe_block, interrupt_number); |
939 | if (ACPI_FAILURE(status)) { | |
8313524a | 940 | ACPI_FREE(gpe_block); |
4be44fcd | 941 | return_ACPI_STATUS(status); |
1da177e4 LT |
942 | } |
943 | ||
944 | /* Find all GPE methods (_Lxx, _Exx) for this block */ | |
945 | ||
4be44fcd LB |
946 | status = acpi_ns_walk_namespace(ACPI_TYPE_METHOD, gpe_device, |
947 | ACPI_UINT32_MAX, ACPI_NS_WALK_NO_UNLOCK, | |
948 | acpi_ev_save_method_info, gpe_block, | |
949 | NULL); | |
1da177e4 | 950 | |
96db255c BM |
951 | /* Return the new block */ |
952 | ||
953 | if (return_gpe_block) { | |
954 | (*return_gpe_block) = gpe_block; | |
955 | } | |
956 | ||
957 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, | |
958 | "GPE %02X to %02X [%4.4s] %u regs on int 0x%X\n", | |
959 | (u32) gpe_block->block_base_number, | |
960 | (u32) (gpe_block->block_base_number + | |
961 | ((gpe_block->register_count * | |
962 | ACPI_GPE_REGISTER_WIDTH) - 1)), | |
963 | gpe_device->name.ascii, gpe_block->register_count, | |
964 | interrupt_number)); | |
965 | ||
e97d6bf1 BM |
966 | /* Update global count of currently available GPEs */ |
967 | ||
968 | acpi_current_gpe_count += register_count * ACPI_GPE_REGISTER_WIDTH; | |
96db255c BM |
969 | return_ACPI_STATUS(AE_OK); |
970 | } | |
971 | ||
972 | /******************************************************************************* | |
973 | * | |
974 | * FUNCTION: acpi_ev_initialize_gpe_block | |
975 | * | |
976 | * PARAMETERS: gpe_device - Handle to the parent GPE block | |
977 | * gpe_block - Gpe Block info | |
978 | * | |
979 | * RETURN: Status | |
980 | * | |
981 | * DESCRIPTION: Initialize and enable a GPE block. First find and run any | |
982 | * _PRT methods associated with the block, then enable the | |
983 | * appropriate GPEs. | |
984 | * Note: Assumes namespace is locked. | |
985 | * | |
986 | ******************************************************************************/ | |
987 | ||
988 | acpi_status | |
989 | acpi_ev_initialize_gpe_block(struct acpi_namespace_node *gpe_device, | |
990 | struct acpi_gpe_block_info *gpe_block) | |
991 | { | |
992 | acpi_status status; | |
993 | struct acpi_gpe_event_info *gpe_event_info; | |
994 | struct acpi_gpe_walk_info gpe_info; | |
995 | u32 wake_gpe_count; | |
996 | u32 gpe_enabled_count; | |
67a119f9 BM |
997 | u32 i; |
998 | u32 j; | |
96db255c | 999 | |
b229cf92 | 1000 | ACPI_FUNCTION_TRACE(ev_initialize_gpe_block); |
96db255c BM |
1001 | |
1002 | /* Ignore a null GPE block (e.g., if no GPE block 1 exists) */ | |
1003 | ||
1004 | if (!gpe_block) { | |
1005 | return_ACPI_STATUS(AE_OK); | |
1006 | } | |
1007 | ||
1da177e4 | 1008 | /* |
96db255c BM |
1009 | * Runtime option: Should wake GPEs be enabled at runtime? The default |
1010 | * is no, they should only be enabled just as the machine goes to sleep. | |
1da177e4 LT |
1011 | */ |
1012 | if (acpi_gbl_leave_wake_gpes_disabled) { | |
1013 | /* | |
96db255c BM |
1014 | * Differentiate runtime vs wake GPEs, via the _PRW control methods. |
1015 | * Each GPE that has one or more _PRWs that reference it is by | |
1016 | * definition a wake GPE and will not be enabled while the machine | |
1017 | * is running. | |
1da177e4 LT |
1018 | */ |
1019 | gpe_info.gpe_block = gpe_block; | |
1020 | gpe_info.gpe_device = gpe_device; | |
1021 | ||
4be44fcd LB |
1022 | status = |
1023 | acpi_ns_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, | |
1024 | ACPI_UINT32_MAX, ACPI_NS_WALK_UNLOCK, | |
1025 | acpi_ev_match_prw_and_gpe, &gpe_info, | |
1026 | NULL); | |
1da177e4 LT |
1027 | } |
1028 | ||
1029 | /* | |
96db255c BM |
1030 | * Enable all GPEs in this block that have these attributes: |
1031 | * 1) are "runtime" or "run/wake" GPEs, and | |
1032 | * 2) have a corresponding _Lxx or _Exx method | |
1033 | * | |
d4913dc6 BM |
1034 | * Any other GPEs within this block must be enabled via the |
1035 | * acpi_enable_gpe() external interface. | |
1da177e4 LT |
1036 | */ |
1037 | wake_gpe_count = 0; | |
1038 | gpe_enabled_count = 0; | |
1039 | ||
1040 | for (i = 0; i < gpe_block->register_count; i++) { | |
1041 | for (j = 0; j < 8; j++) { | |
52fc0b02 | 1042 | |
1da177e4 LT |
1043 | /* Get the info block for this particular GPE */ |
1044 | ||
d4913dc6 BM |
1045 | gpe_event_info = &gpe_block->event_info[((acpi_size) i * |
1046 | ACPI_GPE_REGISTER_WIDTH) | |
1047 | + j]; | |
1da177e4 | 1048 | |
4be44fcd | 1049 | if (((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) == |
d4913dc6 BM |
1050 | ACPI_GPE_DISPATCH_METHOD) && |
1051 | (gpe_event_info->flags & ACPI_GPE_TYPE_RUNTIME)) { | |
1da177e4 LT |
1052 | gpe_enabled_count++; |
1053 | } | |
1054 | ||
1055 | if (gpe_event_info->flags & ACPI_GPE_TYPE_WAKE) { | |
1056 | wake_gpe_count++; | |
1057 | } | |
1058 | } | |
1059 | } | |
1060 | ||
4be44fcd LB |
1061 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
1062 | "Found %u Wake, Enabled %u Runtime GPEs in this block\n", | |
1063 | wake_gpe_count, gpe_enabled_count)); | |
1da177e4 | 1064 | |
96db255c | 1065 | /* Enable all valid runtime GPEs found above */ |
1da177e4 | 1066 | |
e97d6bf1 | 1067 | status = acpi_hw_enable_runtime_gpe_block(NULL, gpe_block, NULL); |
96db255c | 1068 | if (ACPI_FAILURE(status)) { |
b229cf92 | 1069 | ACPI_ERROR((AE_INFO, "Could not enable GPEs in GpeBlock %p", |
b8e4d893 | 1070 | gpe_block)); |
1da177e4 LT |
1071 | } |
1072 | ||
96db255c | 1073 | return_ACPI_STATUS(status); |
1da177e4 LT |
1074 | } |
1075 | ||
1da177e4 LT |
1076 | /******************************************************************************* |
1077 | * | |
1078 | * FUNCTION: acpi_ev_gpe_initialize | |
1079 | * | |
1080 | * PARAMETERS: None | |
1081 | * | |
1082 | * RETURN: Status | |
1083 | * | |
1084 | * DESCRIPTION: Initialize the GPE data structures | |
1085 | * | |
1086 | ******************************************************************************/ | |
1087 | ||
4be44fcd | 1088 | acpi_status acpi_ev_gpe_initialize(void) |
1da177e4 | 1089 | { |
4be44fcd LB |
1090 | u32 register_count0 = 0; |
1091 | u32 register_count1 = 0; | |
1092 | u32 gpe_number_max = 0; | |
1093 | acpi_status status; | |
1da177e4 | 1094 | |
b229cf92 | 1095 | ACPI_FUNCTION_TRACE(ev_gpe_initialize); |
1da177e4 | 1096 | |
4be44fcd LB |
1097 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
1098 | if (ACPI_FAILURE(status)) { | |
1099 | return_ACPI_STATUS(status); | |
1da177e4 LT |
1100 | } |
1101 | ||
1102 | /* | |
1103 | * Initialize the GPE Block(s) defined in the FADT | |
1104 | * | |
d4913dc6 BM |
1105 | * Why the GPE register block lengths are divided by 2: From the ACPI |
1106 | * Spec, section "General-Purpose Event Registers", we have: | |
1da177e4 LT |
1107 | * |
1108 | * "Each register block contains two registers of equal length | |
1109 | * GPEx_STS and GPEx_EN (where x is 0 or 1). The length of the | |
1110 | * GPE0_STS and GPE0_EN registers is equal to half the GPE0_LEN | |
1111 | * The length of the GPE1_STS and GPE1_EN registers is equal to | |
1112 | * half the GPE1_LEN. If a generic register block is not supported | |
1113 | * then its respective block pointer and block length values in the | |
1114 | * FADT table contain zeros. The GPE0_LEN and GPE1_LEN do not need | |
1115 | * to be the same size." | |
1116 | */ | |
1117 | ||
1118 | /* | |
1119 | * Determine the maximum GPE number for this machine. | |
1120 | * | |
1121 | * Note: both GPE0 and GPE1 are optional, and either can exist without | |
1122 | * the other. | |
1123 | * | |
1124 | * If EITHER the register length OR the block address are zero, then that | |
1125 | * particular block is not supported. | |
1126 | */ | |
f3d2e786 BM |
1127 | if (acpi_gbl_FADT.gpe0_block_length && |
1128 | acpi_gbl_FADT.xgpe0_block.address) { | |
52fc0b02 | 1129 | |
1da177e4 LT |
1130 | /* GPE block 0 exists (has both length and address > 0) */ |
1131 | ||
f3d2e786 | 1132 | register_count0 = (u16) (acpi_gbl_FADT.gpe0_block_length / 2); |
1da177e4 | 1133 | |
4be44fcd LB |
1134 | gpe_number_max = |
1135 | (register_count0 * ACPI_GPE_REGISTER_WIDTH) - 1; | |
1da177e4 LT |
1136 | |
1137 | /* Install GPE Block 0 */ | |
1138 | ||
4be44fcd | 1139 | status = acpi_ev_create_gpe_block(acpi_gbl_fadt_gpe_device, |
f3d2e786 | 1140 | &acpi_gbl_FADT.xgpe0_block, |
4be44fcd | 1141 | register_count0, 0, |
f3d2e786 | 1142 | acpi_gbl_FADT.sci_interrupt, |
4be44fcd | 1143 | &acpi_gbl_gpe_fadt_blocks[0]); |
1da177e4 | 1144 | |
4be44fcd | 1145 | if (ACPI_FAILURE(status)) { |
b8e4d893 BM |
1146 | ACPI_EXCEPTION((AE_INFO, status, |
1147 | "Could not create GPE Block 0")); | |
1da177e4 LT |
1148 | } |
1149 | } | |
1150 | ||
f3d2e786 BM |
1151 | if (acpi_gbl_FADT.gpe1_block_length && |
1152 | acpi_gbl_FADT.xgpe1_block.address) { | |
52fc0b02 | 1153 | |
1da177e4 LT |
1154 | /* GPE block 1 exists (has both length and address > 0) */ |
1155 | ||
f3d2e786 | 1156 | register_count1 = (u16) (acpi_gbl_FADT.gpe1_block_length / 2); |
1da177e4 LT |
1157 | |
1158 | /* Check for GPE0/GPE1 overlap (if both banks exist) */ | |
1159 | ||
1160 | if ((register_count0) && | |
f3d2e786 | 1161 | (gpe_number_max >= acpi_gbl_FADT.gpe1_base)) { |
b8e4d893 | 1162 | ACPI_ERROR((AE_INFO, |
d4913dc6 BM |
1163 | "GPE0 block (GPE 0 to %d) overlaps the GPE1 block " |
1164 | "(GPE %d to %d) - Ignoring GPE1", | |
f3d2e786 BM |
1165 | gpe_number_max, acpi_gbl_FADT.gpe1_base, |
1166 | acpi_gbl_FADT.gpe1_base + | |
b8e4d893 BM |
1167 | ((register_count1 * |
1168 | ACPI_GPE_REGISTER_WIDTH) - 1))); | |
1da177e4 LT |
1169 | |
1170 | /* Ignore GPE1 block by setting the register count to zero */ | |
1171 | ||
1172 | register_count1 = 0; | |
4be44fcd | 1173 | } else { |
1da177e4 LT |
1174 | /* Install GPE Block 1 */ |
1175 | ||
4be44fcd LB |
1176 | status = |
1177 | acpi_ev_create_gpe_block(acpi_gbl_fadt_gpe_device, | |
f3d2e786 | 1178 | &acpi_gbl_FADT.xgpe1_block, |
4be44fcd | 1179 | register_count1, |
f3d2e786 BM |
1180 | acpi_gbl_FADT.gpe1_base, |
1181 | acpi_gbl_FADT. | |
1182 | sci_interrupt, | |
4be44fcd LB |
1183 | &acpi_gbl_gpe_fadt_blocks |
1184 | [1]); | |
1185 | ||
1186 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
1187 | ACPI_EXCEPTION((AE_INFO, status, |
1188 | "Could not create GPE Block 1")); | |
1da177e4 LT |
1189 | } |
1190 | ||
1191 | /* | |
1192 | * GPE0 and GPE1 do not have to be contiguous in the GPE number | |
1193 | * space. However, GPE0 always starts at GPE number zero. | |
1194 | */ | |
f3d2e786 | 1195 | gpe_number_max = acpi_gbl_FADT.gpe1_base + |
4be44fcd | 1196 | ((register_count1 * ACPI_GPE_REGISTER_WIDTH) - 1); |
1da177e4 LT |
1197 | } |
1198 | } | |
1199 | ||
1200 | /* Exit if there are no GPE registers */ | |
1201 | ||
1202 | if ((register_count0 + register_count1) == 0) { | |
52fc0b02 | 1203 | |
1da177e4 LT |
1204 | /* GPEs are not required by ACPI, this is OK */ |
1205 | ||
4be44fcd LB |
1206 | ACPI_DEBUG_PRINT((ACPI_DB_INIT, |
1207 | "There are no GPE blocks defined in the FADT\n")); | |
1da177e4 LT |
1208 | status = AE_OK; |
1209 | goto cleanup; | |
1210 | } | |
1211 | ||
1212 | /* Check for Max GPE number out-of-range */ | |
1213 | ||
1214 | if (gpe_number_max > ACPI_GPE_MAX) { | |
b8e4d893 BM |
1215 | ACPI_ERROR((AE_INFO, |
1216 | "Maximum GPE number from FADT is too large: 0x%X", | |
1217 | gpe_number_max)); | |
1da177e4 LT |
1218 | status = AE_BAD_VALUE; |
1219 | goto cleanup; | |
1220 | } | |
1221 | ||
4be44fcd LB |
1222 | cleanup: |
1223 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); | |
1224 | return_ACPI_STATUS(AE_OK); | |
1da177e4 | 1225 | } |