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authorBob Moore <robert.moore@intel.com>2010-04-26 23:41:19 -0400
committerLen Brown <len.brown@intel.com>2010-05-06 03:05:54 -0400
commit3fe50208b29b2463eb6c181c1433dd1beb39f282 (patch)
treea35b7e47a5130e2d0179e34c69a7cae55a327b77
parent186c307f008d2a53961cd970aaf7cb9c33e79cb1 (diff)
ACPICA: Split large file, evgpeblk
Create two new files, evgpeinit.c and evgpeutil.c. Updated unix and linux makefiles. Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat
-rw-r--r--drivers/acpi/acpica/Makefile2
-rw-r--r--drivers/acpi/acpica/acevents.h50
-rw-r--r--drivers/acpi/acpica/evgpeblk.c909
-rw-r--r--drivers/acpi/acpica/evgpeinit.c653
-rw-r--r--drivers/acpi/acpica/evgpeutil.c337
5 files changed, 1025 insertions, 926 deletions
diff --git a/drivers/acpi/acpica/Makefile b/drivers/acpi/acpica/Makefile
index c1102098dbfb..d93cc06f4bf8 100644
--- a/drivers/acpi/acpica/Makefile
+++ b/drivers/acpi/acpica/Makefile
@@ -14,7 +14,7 @@ acpi-y := dsfield.o dsmthdat.o dsopcode.o dswexec.o dswscope.o \
14 14
15acpi-y += evevent.o evregion.o evsci.o evxfevnt.o \ 15acpi-y += evevent.o evregion.o evsci.o evxfevnt.o \
16 evmisc.o evrgnini.o evxface.o evxfregn.o \ 16 evmisc.o evrgnini.o evxface.o evxfregn.o \
17 evgpe.o evgpeblk.o 17 evgpe.o evgpeblk.o evgpeinit.o evgpeutil.o
18 18
19acpi-y += exconfig.o exfield.o exnames.o exoparg6.o exresolv.o exstorob.o\ 19acpi-y += exconfig.o exfield.o exnames.o exoparg6.o exresolv.o exstorob.o\
20 exconvrt.o exfldio.o exoparg1.o exprep.o exresop.o exsystem.o\ 20 exconvrt.o exfldio.o exoparg1.o exprep.o exresop.o exsystem.o\
diff --git a/drivers/acpi/acpica/acevents.h b/drivers/acpi/acpica/acevents.h
index 0f83dc46bd93..64d1e5c2d4ae 100644
--- a/drivers/acpi/acpica/acevents.h
+++ b/drivers/acpi/acpica/acevents.h
@@ -73,8 +73,10 @@ acpi_ev_queue_notify_request(struct acpi_namespace_node *node,
73 u32 notify_value); 73 u32 notify_value);
74 74
75/* 75/*
76 * evgpe - GPE handling and dispatch 76 * evgpe - Low-level GPE support
77 */ 77 */
78u32 acpi_ev_gpe_detect(struct acpi_gpe_xrupt_info *gpe_xrupt_list);
79
78acpi_status 80acpi_status
79acpi_ev_update_gpe_enable_masks(struct acpi_gpe_event_info *gpe_event_info); 81acpi_ev_update_gpe_enable_masks(struct acpi_gpe_event_info *gpe_event_info);
80 82
@@ -90,18 +92,8 @@ struct acpi_gpe_event_info *acpi_ev_low_get_gpe_info(u32 gpe_number,
90 *gpe_block); 92 *gpe_block);
91 93
92/* 94/*
93 * evgpeblk 95 * evgpeblk - Upper-level GPE block support
94 */ 96 */
95u8 acpi_ev_valid_gpe_event(struct acpi_gpe_event_info *gpe_event_info);
96
97acpi_status
98acpi_ev_walk_gpe_list(acpi_gpe_callback gpe_walk_callback, void *context);
99
100acpi_status
101acpi_ev_delete_gpe_handlers(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
102 struct acpi_gpe_block_info *gpe_block,
103 void *context);
104
105acpi_status 97acpi_status
106acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device, 98acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device,
107 struct acpi_generic_address *gpe_block_address, 99 struct acpi_generic_address *gpe_block_address,
@@ -110,8 +102,6 @@ acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device,
110 u32 interrupt_number, 102 u32 interrupt_number,
111 struct acpi_gpe_block_info **return_gpe_block); 103 struct acpi_gpe_block_info **return_gpe_block);
112 104
113void acpi_ev_update_gpes(acpi_owner_id table_owner_id);
114
115acpi_status 105acpi_status
116acpi_ev_initialize_gpe_block(struct acpi_namespace_node *gpe_device, 106acpi_ev_initialize_gpe_block(struct acpi_namespace_node *gpe_device,
117 struct acpi_gpe_block_info *gpe_block); 107 struct acpi_gpe_block_info *gpe_block);
@@ -122,10 +112,38 @@ u32
122acpi_ev_gpe_dispatch(struct acpi_gpe_event_info *gpe_event_info, 112acpi_ev_gpe_dispatch(struct acpi_gpe_event_info *gpe_event_info,
123 u32 gpe_number); 113 u32 gpe_number);
124 114
125u32 acpi_ev_gpe_detect(struct acpi_gpe_xrupt_info *gpe_xrupt_list); 115/*
126 116 * evgpeinit - GPE initialization and update
117 */
127acpi_status acpi_ev_gpe_initialize(void); 118acpi_status acpi_ev_gpe_initialize(void);
128 119
120void acpi_ev_update_gpes(acpi_owner_id table_owner_id);
121
122acpi_status
123acpi_ev_match_gpe_method(acpi_handle obj_handle,
124 u32 level, void *context, void **return_value);
125
126acpi_status
127acpi_ev_match_prw_and_gpe(acpi_handle obj_handle,
128 u32 level, void *context, void **return_value);
129
130/*
131 * evgpeutil - GPE utilities
132 */
133acpi_status
134acpi_ev_walk_gpe_list(acpi_gpe_callback gpe_walk_callback, void *context);
135
136u8 acpi_ev_valid_gpe_event(struct acpi_gpe_event_info *gpe_event_info);
137
138struct acpi_gpe_xrupt_info *acpi_ev_get_gpe_xrupt_block(u32 interrupt_number);
139
140acpi_status acpi_ev_delete_gpe_xrupt(struct acpi_gpe_xrupt_info *gpe_xrupt);
141
142acpi_status
143acpi_ev_delete_gpe_handlers(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
144 struct acpi_gpe_block_info *gpe_block,
145 void *context);
146
129/* 147/*
130 * evregion - Address Space handling 148 * evregion - Address Space handling
131 */ 149 */
diff --git a/drivers/acpi/acpica/evgpeblk.c b/drivers/acpi/acpica/evgpeblk.c
index 3341d1dfe78a..7c28f2d9fd35 100644
--- a/drivers/acpi/acpica/evgpeblk.c
+++ b/drivers/acpi/acpica/evgpeblk.c
@@ -45,27 +45,12 @@
45#include "accommon.h" 45#include "accommon.h"
46#include "acevents.h" 46#include "acevents.h"
47#include "acnamesp.h" 47#include "acnamesp.h"
48#include "acinterp.h"
49 48
50#define _COMPONENT ACPI_EVENTS 49#define _COMPONENT ACPI_EVENTS
51ACPI_MODULE_NAME("evgpeblk") 50ACPI_MODULE_NAME("evgpeblk")
52 51
53/* Local prototypes */ 52/* Local prototypes */
54static acpi_status 53static acpi_status
55acpi_ev_match_gpe_method(acpi_handle obj_handle,
56 u32 level, void *obj_desc, void **return_value);
57
58static acpi_status
59acpi_ev_match_prw_and_gpe(acpi_handle obj_handle,
60 u32 level, void *info, void **return_value);
61
62static struct acpi_gpe_xrupt_info *acpi_ev_get_gpe_xrupt_block(u32
63 interrupt_number);
64
65static acpi_status
66acpi_ev_delete_gpe_xrupt(struct acpi_gpe_xrupt_info *gpe_xrupt);
67
68static acpi_status
69acpi_ev_install_gpe_block(struct acpi_gpe_block_info *gpe_block, 54acpi_ev_install_gpe_block(struct acpi_gpe_block_info *gpe_block,
70 u32 interrupt_number); 55 u32 interrupt_number);
71 56
@@ -74,632 +59,6 @@ acpi_ev_create_gpe_info_blocks(struct acpi_gpe_block_info *gpe_block);
74 59
75/******************************************************************************* 60/*******************************************************************************
76 * 61 *
77 * FUNCTION: acpi_ev_valid_gpe_event
78 *
79 * PARAMETERS: gpe_event_info - Info for this GPE
80 *
81 * RETURN: TRUE if the gpe_event is valid
82 *
83 * DESCRIPTION: Validate a GPE event. DO NOT CALL FROM INTERRUPT LEVEL.
84 * Should be called only when the GPE lists are semaphore locked
85 * and not subject to change.
86 *
87 ******************************************************************************/
88
89u8 acpi_ev_valid_gpe_event(struct acpi_gpe_event_info *gpe_event_info)
90{
91 struct acpi_gpe_xrupt_info *gpe_xrupt_block;
92 struct acpi_gpe_block_info *gpe_block;
93
94 ACPI_FUNCTION_ENTRY();
95
96 /* No need for spin lock since we are not changing any list elements */
97
98 /* Walk the GPE interrupt levels */
99
100 gpe_xrupt_block = acpi_gbl_gpe_xrupt_list_head;
101 while (gpe_xrupt_block) {
102 gpe_block = gpe_xrupt_block->gpe_block_list_head;
103
104 /* Walk the GPE blocks on this interrupt level */
105
106 while (gpe_block) {
107 if ((&gpe_block->event_info[0] <= gpe_event_info) &&
108 (&gpe_block->event_info[gpe_block->gpe_count] >
109 gpe_event_info)) {
110 return (TRUE);
111 }
112
113 gpe_block = gpe_block->next;
114 }
115
116 gpe_xrupt_block = gpe_xrupt_block->next;
117 }
118
119 return (FALSE);
120}
121
122/*******************************************************************************
123 *
124 * FUNCTION: acpi_ev_walk_gpe_list
125 *
126 * PARAMETERS: gpe_walk_callback - Routine called for each GPE block
127 * Context - Value passed to callback
128 *
129 * RETURN: Status
130 *
131 * DESCRIPTION: Walk the GPE lists.
132 *
133 ******************************************************************************/
134
135acpi_status
136acpi_ev_walk_gpe_list(acpi_gpe_callback gpe_walk_callback, void *context)
137{
138 struct acpi_gpe_block_info *gpe_block;
139 struct acpi_gpe_xrupt_info *gpe_xrupt_info;
140 acpi_status status = AE_OK;
141 acpi_cpu_flags flags;
142
143 ACPI_FUNCTION_TRACE(ev_walk_gpe_list);
144
145 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
146
147 /* Walk the interrupt level descriptor list */
148
149 gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head;
150 while (gpe_xrupt_info) {
151
152 /* Walk all Gpe Blocks attached to this interrupt level */
153
154 gpe_block = gpe_xrupt_info->gpe_block_list_head;
155 while (gpe_block) {
156
157 /* One callback per GPE block */
158
159 status =
160 gpe_walk_callback(gpe_xrupt_info, gpe_block,
161 context);
162 if (ACPI_FAILURE(status)) {
163 if (status == AE_CTRL_END) { /* Callback abort */
164 status = AE_OK;
165 }
166 goto unlock_and_exit;
167 }
168
169 gpe_block = gpe_block->next;
170 }
171
172 gpe_xrupt_info = gpe_xrupt_info->next;
173 }
174
175 unlock_and_exit:
176 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
177 return_ACPI_STATUS(status);
178}
179
180/*******************************************************************************
181 *
182 * FUNCTION: acpi_ev_delete_gpe_handlers
183 *
184 * PARAMETERS: gpe_xrupt_info - GPE Interrupt info
185 * gpe_block - Gpe Block info
186 *
187 * RETURN: Status
188 *
189 * DESCRIPTION: Delete all Handler objects found in the GPE data structs.
190 * Used only prior to termination.
191 *
192 ******************************************************************************/
193
194acpi_status
195acpi_ev_delete_gpe_handlers(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
196 struct acpi_gpe_block_info *gpe_block,
197 void *context)
198{
199 struct acpi_gpe_event_info *gpe_event_info;
200 u32 i;
201 u32 j;
202
203 ACPI_FUNCTION_TRACE(ev_delete_gpe_handlers);
204
205 /* Examine each GPE Register within the block */
206
207 for (i = 0; i < gpe_block->register_count; i++) {
208
209 /* Now look at the individual GPEs in this byte register */
210
211 for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) {
212 gpe_event_info = &gpe_block->event_info[((acpi_size) i *
213 ACPI_GPE_REGISTER_WIDTH)
214 + j];
215
216 if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
217 ACPI_GPE_DISPATCH_HANDLER) {
218 ACPI_FREE(gpe_event_info->dispatch.handler);
219 gpe_event_info->dispatch.handler = NULL;
220 gpe_event_info->flags &=
221 ~ACPI_GPE_DISPATCH_MASK;
222 }
223 }
224 }
225
226 return_ACPI_STATUS(AE_OK);
227}
228
229/*******************************************************************************
230 *
231 * FUNCTION: acpi_ev_match_gpe_method
232 *
233 * PARAMETERS: Callback from walk_namespace
234 *
235 * RETURN: Status
236 *
237 * DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a
238 * control method under the _GPE portion of the namespace.
239 * Extract the name and GPE type from the object, saving this
240 * information for quick lookup during GPE dispatch. Allows a
241 * per-owner_id evaluation if execute_by_owner_id is TRUE in the
242 * walk_info parameter block.
243 *
244 * The name of each GPE control method is of the form:
245 * "_Lxx" or "_Exx", 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 * If walk_info->execute_by_owner_id is TRUE, we only execute examine GPE methods
251 * with that owner.
252 * If walk_info->enable_this_gpe is TRUE, the GPE that is referred to by a GPE
253 * method is immediately enabled (Used for Load/load_table operators)
254 *
255 ******************************************************************************/
256
257static acpi_status
258acpi_ev_match_gpe_method(acpi_handle obj_handle,
259 u32 level, void *context, void **return_value)
260{
261 struct acpi_namespace_node *method_node =
262 ACPI_CAST_PTR(struct acpi_namespace_node, obj_handle);
263 struct acpi_gpe_walk_info *walk_info =
264 ACPI_CAST_PTR(struct acpi_gpe_walk_info, context);
265 struct acpi_gpe_event_info *gpe_event_info;
266 struct acpi_namespace_node *gpe_device;
267 acpi_status status;
268 u32 gpe_number;
269 char name[ACPI_NAME_SIZE + 1];
270 u8 type;
271
272 ACPI_FUNCTION_TRACE(ev_match_gpe_method);
273
274 /* Check if requested owner_id matches this owner_id */
275
276 if ((walk_info->execute_by_owner_id) &&
277 (method_node->owner_id != walk_info->owner_id)) {
278 return_ACPI_STATUS(AE_OK);
279 }
280
281 /*
282 * Match and decode the _Lxx and _Exx GPE method names
283 *
284 * 1) Extract the method name and null terminate it
285 */
286 ACPI_MOVE_32_TO_32(name, &method_node->name.integer);
287 name[ACPI_NAME_SIZE] = 0;
288
289 /* 2) Name must begin with an underscore */
290
291 if (name[0] != '_') {
292 return_ACPI_STATUS(AE_OK); /* Ignore this method */
293 }
294
295 /*
296 * 3) Edge/Level determination is based on the 2nd character
297 * of the method name
298 *
299 * NOTE: Default GPE type is RUNTIME only. Later, if a _PRW object is
300 * found that points to this GPE, the ACPI_GPE_CAN_WAKE flag is set.
301 */
302 switch (name[1]) {
303 case 'L':
304 type = ACPI_GPE_LEVEL_TRIGGERED;
305 break;
306
307 case 'E':
308 type = ACPI_GPE_EDGE_TRIGGERED;
309 break;
310
311 default:
312 /* Unknown method type, just ignore it */
313
314 ACPI_DEBUG_PRINT((ACPI_DB_LOAD,
315 "Ignoring unknown GPE method type: %s "
316 "(name not of form _Lxx or _Exx)", name));
317 return_ACPI_STATUS(AE_OK);
318 }
319
320 /* 4) The last two characters of the name are the hex GPE Number */
321
322 gpe_number = ACPI_STRTOUL(&name[2], NULL, 16);
323 if (gpe_number == ACPI_UINT32_MAX) {
324
325 /* Conversion failed; invalid method, just ignore it */
326
327 ACPI_DEBUG_PRINT((ACPI_DB_LOAD,
328 "Could not extract GPE number from name: %s "
329 "(name is not of form _Lxx or _Exx)", name));
330 return_ACPI_STATUS(AE_OK);
331 }
332
333 /* Ensure that we have a valid GPE number for this GPE block */
334
335 gpe_event_info =
336 acpi_ev_low_get_gpe_info(gpe_number, walk_info->gpe_block);
337 if (!gpe_event_info) {
338 /*
339 * This gpe_number is not valid for this GPE block, just ignore it.
340 * However, it may be valid for a different GPE block, since GPE0
341 * and GPE1 methods both appear under \_GPE.
342 */
343 return_ACPI_STATUS(AE_OK);
344 }
345
346 if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
347 ACPI_GPE_DISPATCH_HANDLER) {
348
349 /* If there is already a handler, ignore this GPE method */
350
351 return_ACPI_STATUS(AE_OK);
352 }
353
354 if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
355 ACPI_GPE_DISPATCH_METHOD) {
356 /*
357 * If there is already a method, ignore this method. But check
358 * for a type mismatch (if both the _Lxx AND _Exx exist)
359 */
360 if (type != (gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK)) {
361 ACPI_ERROR((AE_INFO,
362 "For GPE 0x%.2X, found both _L%2.2X and _E%2.2X methods",
363 gpe_number, gpe_number, gpe_number));
364 }
365 return_ACPI_STATUS(AE_OK);
366 }
367
368 /*
369 * Add the GPE information from above to the gpe_event_info block for
370 * use during dispatch of this GPE.
371 */
372 gpe_event_info->flags |= (u8)(type | ACPI_GPE_DISPATCH_METHOD);
373 gpe_event_info->dispatch.method_node = method_node;
374
375 /*
376 * Enable this GPE if requested. This only happens when during the
377 * execution of a Load or load_table operator. We have found a new
378 * GPE method and want to immediately enable the GPE if it is a
379 * runtime GPE.
380 */
381 if (walk_info->enable_this_gpe) {
382
383 /* Ignore GPEs that can wake the system */
384
385 if (!(gpe_event_info->flags & ACPI_GPE_CAN_WAKE) ||
386 !acpi_gbl_leave_wake_gpes_disabled) {
387 walk_info->count++;
388 gpe_device = walk_info->gpe_device;
389
390 if (gpe_device == acpi_gbl_fadt_gpe_device) {
391 gpe_device = NULL;
392 }
393
394 status = acpi_enable_gpe(gpe_device, gpe_number,
395 ACPI_GPE_TYPE_RUNTIME);
396 if (ACPI_FAILURE(status)) {
397 ACPI_EXCEPTION((AE_INFO, status,
398 "Could not enable GPE 0x%02X",
399 gpe_number));
400 }
401 }
402 }
403
404 ACPI_DEBUG_PRINT((ACPI_DB_LOAD,
405 "Registered GPE method %s as GPE number 0x%.2X\n",
406 name, gpe_number));
407 return_ACPI_STATUS(AE_OK);
408}
409
410/*******************************************************************************
411 *
412 * FUNCTION: acpi_ev_match_prw_and_gpe
413 *
414 * PARAMETERS: Callback from walk_namespace
415 *
416 * RETURN: Status. NOTE: We ignore errors so that the _PRW walk is
417 * not aborted on a single _PRW failure.
418 *
419 * DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a
420 * Device. Run the _PRW method. If present, extract the GPE
421 * number and mark the GPE as a CAN_WAKE GPE. Allows a
422 * per-owner_id execution if execute_by_owner_id is TRUE in the
423 * walk_info parameter block.
424 *
425 * If walk_info->execute_by_owner_id is TRUE, we only execute _PRWs with that
426 * owner.
427 * If walk_info->gpe_device is NULL, we execute every _PRW found. Otherwise,
428 * we only execute _PRWs that refer to the input gpe_device.
429 *
430 ******************************************************************************/
431
432static acpi_status
433acpi_ev_match_prw_and_gpe(acpi_handle obj_handle,
434 u32 level, void *context, void **return_value)
435{
436 struct acpi_gpe_walk_info *walk_info =
437 ACPI_CAST_PTR(struct acpi_gpe_walk_info, context);
438 struct acpi_namespace_node *gpe_device;
439 struct acpi_gpe_block_info *gpe_block;
440 struct acpi_namespace_node *target_gpe_device;
441 struct acpi_namespace_node *prw_node;
442 struct acpi_gpe_event_info *gpe_event_info;
443 union acpi_operand_object *pkg_desc;
444 union acpi_operand_object *obj_desc;
445 u32 gpe_number;
446 acpi_status status;
447
448 ACPI_FUNCTION_TRACE(ev_match_prw_and_gpe);
449
450 /* Check for a _PRW method under this device */
451
452 status = acpi_ns_get_node(obj_handle, METHOD_NAME__PRW,
453 ACPI_NS_NO_UPSEARCH, &prw_node);
454 if (ACPI_FAILURE(status)) {
455 return_ACPI_STATUS(AE_OK);
456 }
457
458 /* Check if requested owner_id matches this owner_id */
459
460 if ((walk_info->execute_by_owner_id) &&
461 (prw_node->owner_id != walk_info->owner_id)) {
462 return_ACPI_STATUS(AE_OK);
463 }
464
465 /* Execute the _PRW */
466
467 status = acpi_ut_evaluate_object(prw_node, NULL,
468 ACPI_BTYPE_PACKAGE, &pkg_desc);
469 if (ACPI_FAILURE(status)) {
470 return_ACPI_STATUS(AE_OK);
471 }
472
473 /* The returned _PRW package must have at least two elements */
474
475 if (pkg_desc->package.count < 2) {
476 goto cleanup;
477 }
478
479 /* Extract pointers from the input context */
480
481 gpe_device = walk_info->gpe_device;
482 gpe_block = walk_info->gpe_block;
483
484 /*
485 * The _PRW object must return a package, we are only interested
486 * in the first element
487 */
488 obj_desc = pkg_desc->package.elements[0];
489
490 if (obj_desc->common.type == ACPI_TYPE_INTEGER) {
491
492 /* Use FADT-defined GPE device (from definition of _PRW) */
493
494 target_gpe_device = NULL;
495 if (gpe_device) {
496 target_gpe_device = acpi_gbl_fadt_gpe_device;
497 }
498
499 /* Integer is the GPE number in the FADT described GPE blocks */
500
501 gpe_number = (u32) obj_desc->integer.value;
502 } else if (obj_desc->common.type == ACPI_TYPE_PACKAGE) {
503
504 /* Package contains a GPE reference and GPE number within a GPE block */
505
506 if ((obj_desc->package.count < 2) ||
507 ((obj_desc->package.elements[0])->common.type !=
508 ACPI_TYPE_LOCAL_REFERENCE) ||
509 ((obj_desc->package.elements[1])->common.type !=
510 ACPI_TYPE_INTEGER)) {
511 goto cleanup;
512 }
513
514 /* Get GPE block reference and decode */
515
516 target_gpe_device =
517 obj_desc->package.elements[0]->reference.node;
518 gpe_number = (u32) obj_desc->package.elements[1]->integer.value;
519 } else {
520 /* Unknown type, just ignore it */
521
522 goto cleanup;
523 }
524
525 /* Get the gpe_event_info for this GPE */
526
527 if (gpe_device) {
528 /*
529 * Is this GPE within this block?
530 *
531 * TRUE if and only if these conditions are true:
532 * 1) The GPE devices match.
533 * 2) The GPE index(number) is within the range of the Gpe Block
534 * associated with the GPE device.
535 */
536 if (gpe_device != target_gpe_device) {
537 goto cleanup;
538 }
539
540 gpe_event_info =
541 acpi_ev_low_get_gpe_info(gpe_number, gpe_block);
542 } else {
543 /* gpe_device is NULL, just match the target_device and gpe_number */
544
545 gpe_event_info =
546 acpi_ev_get_gpe_event_info(target_gpe_device, gpe_number);
547 }
548
549 if (gpe_event_info) {
550 if (!(gpe_event_info->flags & ACPI_GPE_CAN_WAKE)) {
551
552 /* This GPE can wake the system */
553
554 gpe_event_info->flags |= ACPI_GPE_CAN_WAKE;
555 walk_info->count++;
556 }
557 }
558
559 cleanup:
560 acpi_ut_remove_reference(pkg_desc);
561 return_ACPI_STATUS(AE_OK);
562}
563
564/*******************************************************************************
565 *
566 * FUNCTION: acpi_ev_get_gpe_xrupt_block
567 *
568 * PARAMETERS: interrupt_number - Interrupt for a GPE block
569 *
570 * RETURN: A GPE interrupt block
571 *
572 * DESCRIPTION: Get or Create a GPE interrupt block. There is one interrupt
573 * block per unique interrupt level used for GPEs. Should be
574 * called only when the GPE lists are semaphore locked and not
575 * subject to change.
576 *
577 ******************************************************************************/
578
579static struct acpi_gpe_xrupt_info *acpi_ev_get_gpe_xrupt_block(u32
580 interrupt_number)
581{
582 struct acpi_gpe_xrupt_info *next_gpe_xrupt;
583 struct acpi_gpe_xrupt_info *gpe_xrupt;
584 acpi_status status;
585 acpi_cpu_flags flags;
586
587 ACPI_FUNCTION_TRACE(ev_get_gpe_xrupt_block);
588
589 /* No need for lock since we are not changing any list elements here */
590
591 next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head;
592 while (next_gpe_xrupt) {
593 if (next_gpe_xrupt->interrupt_number == interrupt_number) {
594 return_PTR(next_gpe_xrupt);
595 }
596
597 next_gpe_xrupt = next_gpe_xrupt->next;
598 }
599
600 /* Not found, must allocate a new xrupt descriptor */
601
602 gpe_xrupt = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_xrupt_info));
603 if (!gpe_xrupt) {
604 return_PTR(NULL);
605 }
606
607 gpe_xrupt->interrupt_number = interrupt_number;
608
609 /* Install new interrupt descriptor with spin lock */
610
611 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
612 if (acpi_gbl_gpe_xrupt_list_head) {
613 next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head;
614 while (next_gpe_xrupt->next) {
615 next_gpe_xrupt = next_gpe_xrupt->next;
616 }
617
618 next_gpe_xrupt->next = gpe_xrupt;
619 gpe_xrupt->previous = next_gpe_xrupt;
620 } else {
621 acpi_gbl_gpe_xrupt_list_head = gpe_xrupt;
622 }
623 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
624
625 /* Install new interrupt handler if not SCI_INT */
626
627 if (interrupt_number != acpi_gbl_FADT.sci_interrupt) {
628 status = acpi_os_install_interrupt_handler(interrupt_number,
629 acpi_ev_gpe_xrupt_handler,
630 gpe_xrupt);
631 if (ACPI_FAILURE(status)) {
632 ACPI_ERROR((AE_INFO,
633 "Could not install GPE interrupt handler at level 0x%X",
634 interrupt_number));
635 return_PTR(NULL);
636 }
637 }
638
639 return_PTR(gpe_xrupt);
640}
641
642/*******************************************************************************
643 *
644 * FUNCTION: acpi_ev_delete_gpe_xrupt
645 *
646 * PARAMETERS: gpe_xrupt - A GPE interrupt info block
647 *
648 * RETURN: Status
649 *
650 * DESCRIPTION: Remove and free a gpe_xrupt block. Remove an associated
651 * interrupt handler if not the SCI interrupt.
652 *
653 ******************************************************************************/
654
655static acpi_status
656acpi_ev_delete_gpe_xrupt(struct acpi_gpe_xrupt_info *gpe_xrupt)
657{
658 acpi_status status;
659 acpi_cpu_flags flags;
660
661 ACPI_FUNCTION_TRACE(ev_delete_gpe_xrupt);
662
663 /* We never want to remove the SCI interrupt handler */
664
665 if (gpe_xrupt->interrupt_number == acpi_gbl_FADT.sci_interrupt) {
666 gpe_xrupt->gpe_block_list_head = NULL;
667 return_ACPI_STATUS(AE_OK);
668 }
669
670 /* Disable this interrupt */
671
672 status =
673 acpi_os_remove_interrupt_handler(gpe_xrupt->interrupt_number,
674 acpi_ev_gpe_xrupt_handler);
675 if (ACPI_FAILURE(status)) {
676 return_ACPI_STATUS(status);
677 }
678
679 /* Unlink the interrupt block with lock */
680
681 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
682 if (gpe_xrupt->previous) {
683 gpe_xrupt->previous->next = gpe_xrupt->next;
684 } else {
685 /* No previous, update list head */
686
687 acpi_gbl_gpe_xrupt_list_head = gpe_xrupt->next;
688 }
689
690 if (gpe_xrupt->next) {
691 gpe_xrupt->next->previous = gpe_xrupt->previous;
692 }
693 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
694
695 /* Free the block */
696
697 ACPI_FREE(gpe_xrupt);
698 return_ACPI_STATUS(AE_OK);
699}
700
701/*******************************************************************************
702 *
703 * FUNCTION: acpi_ev_install_gpe_block 62 * FUNCTION: acpi_ev_install_gpe_block
704 * 63 *
705 * PARAMETERS: gpe_block - New GPE block 64 * PARAMETERS: gpe_block - New GPE block
@@ -1060,123 +419,6 @@ acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device,
1060 419
1061/******************************************************************************* 420/*******************************************************************************
1062 * 421 *
1063 * FUNCTION: acpi_ev_update_gpes
1064 *
1065 * PARAMETERS: table_owner_id - ID of the newly-loaded ACPI table
1066 *
1067 * RETURN: None
1068 *
1069 * DESCRIPTION: Check for new GPE methods (_Lxx/_Exx) made available as a
1070 * result of a Load() or load_table() operation. If new GPE
1071 * methods have been installed, register the new methods and
1072 * enable and runtime GPEs that are associated with them. Also,
1073 * run any newly loaded _PRW methods in order to discover any
1074 * new CAN_WAKE GPEs.
1075 *
1076 ******************************************************************************/
1077
1078void acpi_ev_update_gpes(acpi_owner_id table_owner_id)
1079{
1080 struct acpi_gpe_xrupt_info *gpe_xrupt_info;
1081 struct acpi_gpe_block_info *gpe_block;
1082 struct acpi_gpe_walk_info walk_info;
1083 acpi_status status = AE_OK;
1084 u32 new_wake_gpe_count = 0;
1085
1086 /* We will examine only _PRW/_Lxx/_Exx methods owned by this table */
1087
1088 walk_info.owner_id = table_owner_id;
1089 walk_info.execute_by_owner_id = TRUE;
1090 walk_info.count = 0;
1091
1092 if (acpi_gbl_leave_wake_gpes_disabled) {
1093 /*
1094 * 1) Run any newly-loaded _PRW methods to find any GPEs that
1095 * can now be marked as CAN_WAKE GPEs. Note: We must run the
1096 * _PRW methods before we process the _Lxx/_Exx methods because
1097 * we will enable all runtime GPEs associated with the new
1098 * _Lxx/_Exx methods at the time we process those methods.
1099 *
1100 * Unlock interpreter so that we can run the _PRW methods.
1101 */
1102 walk_info.gpe_block = NULL;
1103 walk_info.gpe_device = NULL;
1104
1105 acpi_ex_exit_interpreter();
1106
1107 status =
1108 acpi_ns_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
1109 ACPI_UINT32_MAX,
1110 ACPI_NS_WALK_NO_UNLOCK,
1111 acpi_ev_match_prw_and_gpe, NULL,
1112 &walk_info, NULL);
1113 if (ACPI_FAILURE(status)) {
1114 ACPI_EXCEPTION((AE_INFO, status,
1115 "While executing _PRW methods"));
1116 }
1117
1118 acpi_ex_enter_interpreter();
1119 new_wake_gpe_count = walk_info.count;
1120 }
1121
1122 /*
1123 * 2) Find any _Lxx/_Exx GPE methods that have just been loaded.
1124 *
1125 * Any GPEs that correspond to new _Lxx/_Exx methods and are not
1126 * marked as CAN_WAKE are immediately enabled.
1127 *
1128 * Examine the namespace underneath each gpe_device within the
1129 * gpe_block lists.
1130 */
1131 status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
1132 if (ACPI_FAILURE(status)) {
1133 return;
1134 }
1135
1136 walk_info.count = 0;
1137 walk_info.enable_this_gpe = TRUE;
1138
1139 /* Walk the interrupt level descriptor list */
1140
1141 gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head;
1142 while (gpe_xrupt_info) {
1143
1144 /* Walk all Gpe Blocks attached to this interrupt level */
1145
1146 gpe_block = gpe_xrupt_info->gpe_block_list_head;
1147 while (gpe_block) {
1148 walk_info.gpe_block = gpe_block;
1149 walk_info.gpe_device = gpe_block->node;
1150
1151 status = acpi_ns_walk_namespace(ACPI_TYPE_METHOD,
1152 walk_info.gpe_device,
1153 ACPI_UINT32_MAX,
1154 ACPI_NS_WALK_NO_UNLOCK,
1155 acpi_ev_match_gpe_method,
1156 NULL, &walk_info, NULL);
1157 if (ACPI_FAILURE(status)) {
1158 ACPI_EXCEPTION((AE_INFO, status,
1159 "While decoding _Lxx/_Exx methods"));
1160 }
1161
1162 gpe_block = gpe_block->next;
1163 }
1164
1165 gpe_xrupt_info = gpe_xrupt_info->next;
1166 }
1167
1168 if (walk_info.count || new_wake_gpe_count) {
1169 ACPI_INFO((AE_INFO,
1170 "Enabled %u new runtime GPEs, added %u new wakeup GPEs",
1171 walk_info.count, new_wake_gpe_count));
1172 }
1173
1174 (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
1175 return;
1176}
1177
1178/*******************************************************************************
1179 *
1180 * FUNCTION: acpi_ev_initialize_gpe_block 422 * FUNCTION: acpi_ev_initialize_gpe_block
1181 * 423 *
1182 * PARAMETERS: gpe_device - Handle to the parent GPE block 424 * PARAMETERS: gpe_device - Handle to the parent GPE block
@@ -1296,154 +538,3 @@ acpi_ev_initialize_gpe_block(struct acpi_namespace_node *gpe_device,
1296 538
1297 return_ACPI_STATUS(AE_OK); 539 return_ACPI_STATUS(AE_OK);
1298} 540}
1299
1300/*******************************************************************************
1301 *
1302 * FUNCTION: acpi_ev_gpe_initialize
1303 *
1304 * PARAMETERS: None
1305 *
1306 * RETURN: Status
1307 *
1308 * DESCRIPTION: Initialize the GPE data structures
1309 *
1310 ******************************************************************************/
1311
1312acpi_status acpi_ev_gpe_initialize(void)
1313{
1314 u32 register_count0 = 0;
1315 u32 register_count1 = 0;
1316 u32 gpe_number_max = 0;
1317 acpi_status status;
1318
1319 ACPI_FUNCTION_TRACE(ev_gpe_initialize);
1320
1321 status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
1322 if (ACPI_FAILURE(status)) {
1323 return_ACPI_STATUS(status);
1324 }
1325
1326 /*
1327 * Initialize the GPE Block(s) defined in the FADT
1328 *
1329 * Why the GPE register block lengths are divided by 2: From the ACPI
1330 * Spec, section "General-Purpose Event Registers", we have:
1331 *
1332 * "Each register block contains two registers of equal length
1333 * GPEx_STS and GPEx_EN (where x is 0 or 1). The length of the
1334 * GPE0_STS and GPE0_EN registers is equal to half the GPE0_LEN
1335 * The length of the GPE1_STS and GPE1_EN registers is equal to
1336 * half the GPE1_LEN. If a generic register block is not supported
1337 * then its respective block pointer and block length values in the
1338 * FADT table contain zeros. The GPE0_LEN and GPE1_LEN do not need
1339 * to be the same size."
1340 */
1341
1342 /*
1343 * Determine the maximum GPE number for this machine.
1344 *
1345 * Note: both GPE0 and GPE1 are optional, and either can exist without
1346 * the other.
1347 *
1348 * If EITHER the register length OR the block address are zero, then that
1349 * particular block is not supported.
1350 */
1351 if (acpi_gbl_FADT.gpe0_block_length &&
1352 acpi_gbl_FADT.xgpe0_block.address) {
1353
1354 /* GPE block 0 exists (has both length and address > 0) */
1355
1356 register_count0 = (u16) (acpi_gbl_FADT.gpe0_block_length / 2);
1357
1358 gpe_number_max =
1359 (register_count0 * ACPI_GPE_REGISTER_WIDTH) - 1;
1360
1361 /* Install GPE Block 0 */
1362
1363 status = acpi_ev_create_gpe_block(acpi_gbl_fadt_gpe_device,
1364 &acpi_gbl_FADT.xgpe0_block,
1365 register_count0, 0,
1366 acpi_gbl_FADT.sci_interrupt,
1367 &acpi_gbl_gpe_fadt_blocks[0]);
1368
1369 if (ACPI_FAILURE(status)) {
1370 ACPI_EXCEPTION((AE_INFO, status,
1371 "Could not create GPE Block 0"));
1372 }
1373 }
1374
1375 if (acpi_gbl_FADT.gpe1_block_length &&
1376 acpi_gbl_FADT.xgpe1_block.address) {
1377
1378 /* GPE block 1 exists (has both length and address > 0) */
1379
1380 register_count1 = (u16) (acpi_gbl_FADT.gpe1_block_length / 2);
1381
1382 /* Check for GPE0/GPE1 overlap (if both banks exist) */
1383
1384 if ((register_count0) &&
1385 (gpe_number_max >= acpi_gbl_FADT.gpe1_base)) {
1386 ACPI_ERROR((AE_INFO,
1387 "GPE0 block (GPE 0 to %u) overlaps the GPE1 block "
1388 "(GPE %u to %u) - Ignoring GPE1",
1389 gpe_number_max, acpi_gbl_FADT.gpe1_base,
1390 acpi_gbl_FADT.gpe1_base +
1391 ((register_count1 *
1392 ACPI_GPE_REGISTER_WIDTH) - 1)));
1393
1394 /* Ignore GPE1 block by setting the register count to zero */
1395
1396 register_count1 = 0;
1397 } else {
1398 /* Install GPE Block 1 */
1399
1400 status =
1401 acpi_ev_create_gpe_block(acpi_gbl_fadt_gpe_device,
1402 &acpi_gbl_FADT.xgpe1_block,
1403 register_count1,
1404 acpi_gbl_FADT.gpe1_base,
1405 acpi_gbl_FADT.
1406 sci_interrupt,
1407 &acpi_gbl_gpe_fadt_blocks
1408 [1]);
1409
1410 if (ACPI_FAILURE(status)) {
1411 ACPI_EXCEPTION((AE_INFO, status,
1412 "Could not create GPE Block 1"));
1413 }
1414
1415 /*
1416 * GPE0 and GPE1 do not have to be contiguous in the GPE number
1417 * space. However, GPE0 always starts at GPE number zero.
1418 */
1419 gpe_number_max = acpi_gbl_FADT.gpe1_base +
1420 ((register_count1 * ACPI_GPE_REGISTER_WIDTH) - 1);
1421 }
1422 }
1423
1424 /* Exit if there are no GPE registers */
1425
1426 if ((register_count0 + register_count1) == 0) {
1427
1428 /* GPEs are not required by ACPI, this is OK */
1429
1430 ACPI_DEBUG_PRINT((ACPI_DB_INIT,
1431 "There are no GPE blocks defined in the FADT\n"));
1432 status = AE_OK;
1433 goto cleanup;
1434 }
1435
1436 /* Check for Max GPE number out-of-range */
1437
1438 if (gpe_number_max > ACPI_GPE_MAX) {
1439 ACPI_ERROR((AE_INFO,
1440 "Maximum GPE number from FADT is too large: 0x%X",
1441 gpe_number_max));
1442 status = AE_BAD_VALUE;
1443 goto cleanup;
1444 }
1445
1446 cleanup:
1447 (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
1448 return_ACPI_STATUS(AE_OK);
1449}
diff --git a/drivers/acpi/acpica/evgpeinit.c b/drivers/acpi/acpica/evgpeinit.c
new file mode 100644
index 000000000000..3f6c2d26410d
--- /dev/null
+++ b/drivers/acpi/acpica/evgpeinit.c
@@ -0,0 +1,653 @@
1/******************************************************************************
2 *
3 * Module Name: evgpeinit - System GPE initialization and update
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2010, Intel Corp.
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions, and the following disclaimer,
16 * without modification.
17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18 * substantially similar to the "NO WARRANTY" disclaimer below
19 * ("Disclaimer") and any redistribution must be conditioned upon
20 * including a substantially similar Disclaimer requirement for further
21 * binary redistribution.
22 * 3. Neither the names of the above-listed copyright holders nor the names
23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
25 *
26 * Alternatively, this software may be distributed under the terms of the
27 * GNU General Public License ("GPL") version 2 as published by the Free
28 * Software Foundation.
29 *
30 * NO WARRANTY
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41 * POSSIBILITY OF SUCH DAMAGES.
42 */
43
44#include <acpi/acpi.h>
45#include "accommon.h"
46#include "acevents.h"
47#include "acnamesp.h"
48#include "acinterp.h"
49
50#define _COMPONENT ACPI_EVENTS
51ACPI_MODULE_NAME("evgpeinit")
52
53/*******************************************************************************
54 *
55 * FUNCTION: acpi_ev_gpe_initialize
56 *
57 * PARAMETERS: None
58 *
59 * RETURN: Status
60 *
61 * DESCRIPTION: Initialize the GPE data structures and the FADT GPE 0/1 blocks
62 *
63 ******************************************************************************/
64acpi_status acpi_ev_gpe_initialize(void)
65{
66 u32 register_count0 = 0;
67 u32 register_count1 = 0;
68 u32 gpe_number_max = 0;
69 acpi_status status;
70
71 ACPI_FUNCTION_TRACE(ev_gpe_initialize);
72
73 status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
74 if (ACPI_FAILURE(status)) {
75 return_ACPI_STATUS(status);
76 }
77
78 /*
79 * Initialize the GPE Block(s) defined in the FADT
80 *
81 * Why the GPE register block lengths are divided by 2: From the ACPI
82 * Spec, section "General-Purpose Event Registers", we have:
83 *
84 * "Each register block contains two registers of equal length
85 * GPEx_STS and GPEx_EN (where x is 0 or 1). The length of the
86 * GPE0_STS and GPE0_EN registers is equal to half the GPE0_LEN
87 * The length of the GPE1_STS and GPE1_EN registers is equal to
88 * half the GPE1_LEN. If a generic register block is not supported
89 * then its respective block pointer and block length values in the
90 * FADT table contain zeros. The GPE0_LEN and GPE1_LEN do not need
91 * to be the same size."
92 */
93
94 /*
95 * Determine the maximum GPE number for this machine.
96 *
97 * Note: both GPE0 and GPE1 are optional, and either can exist without
98 * the other.
99 *
100 * If EITHER the register length OR the block address are zero, then that
101 * particular block is not supported.
102 */
103 if (acpi_gbl_FADT.gpe0_block_length &&
104 acpi_gbl_FADT.xgpe0_block.address) {
105
106 /* GPE block 0 exists (has both length and address > 0) */
107
108 register_count0 = (u16)(acpi_gbl_FADT.gpe0_block_length / 2);
109
110 gpe_number_max =
111 (register_count0 * ACPI_GPE_REGISTER_WIDTH) - 1;
112
113 /* Install GPE Block 0 */
114
115 status = acpi_ev_create_gpe_block(acpi_gbl_fadt_gpe_device,
116 &acpi_gbl_FADT.xgpe0_block,
117 register_count0, 0,
118 acpi_gbl_FADT.sci_interrupt,
119 &acpi_gbl_gpe_fadt_blocks[0]);
120
121 if (ACPI_FAILURE(status)) {
122 ACPI_EXCEPTION((AE_INFO, status,
123 "Could not create GPE Block 0"));
124 }
125 }
126
127 if (acpi_gbl_FADT.gpe1_block_length &&
128 acpi_gbl_FADT.xgpe1_block.address) {
129
130 /* GPE block 1 exists (has both length and address > 0) */
131
132 register_count1 = (u16)(acpi_gbl_FADT.gpe1_block_length / 2);
133
134 /* Check for GPE0/GPE1 overlap (if both banks exist) */
135
136 if ((register_count0) &&
137 (gpe_number_max >= acpi_gbl_FADT.gpe1_base)) {
138 ACPI_ERROR((AE_INFO,
139 "GPE0 block (GPE 0 to %u) overlaps the GPE1 block "
140 "(GPE %u to %u) - Ignoring GPE1",
141 gpe_number_max, acpi_gbl_FADT.gpe1_base,
142 acpi_gbl_FADT.gpe1_base +
143 ((register_count1 *
144 ACPI_GPE_REGISTER_WIDTH) - 1)));
145
146 /* Ignore GPE1 block by setting the register count to zero */
147
148 register_count1 = 0;
149 } else {
150 /* Install GPE Block 1 */
151
152 status =
153 acpi_ev_create_gpe_block(acpi_gbl_fadt_gpe_device,
154 &acpi_gbl_FADT.xgpe1_block,
155 register_count1,
156 acpi_gbl_FADT.gpe1_base,
157 acpi_gbl_FADT.
158 sci_interrupt,
159 &acpi_gbl_gpe_fadt_blocks
160 [1]);
161
162 if (ACPI_FAILURE(status)) {
163 ACPI_EXCEPTION((AE_INFO, status,
164 "Could not create GPE Block 1"));
165 }
166
167 /*
168 * GPE0 and GPE1 do not have to be contiguous in the GPE number
169 * space. However, GPE0 always starts at GPE number zero.
170 */
171 gpe_number_max = acpi_gbl_FADT.gpe1_base +
172 ((register_count1 * ACPI_GPE_REGISTER_WIDTH) - 1);
173 }
174 }
175
176 /* Exit if there are no GPE registers */
177
178 if ((register_count0 + register_count1) == 0) {
179
180 /* GPEs are not required by ACPI, this is OK */
181
182 ACPI_DEBUG_PRINT((ACPI_DB_INIT,
183 "There are no GPE blocks defined in the FADT\n"));
184 status = AE_OK;
185 goto cleanup;
186 }
187
188 /* Check for Max GPE number out-of-range */
189
190 if (gpe_number_max > ACPI_GPE_MAX) {
191 ACPI_ERROR((AE_INFO,
192 "Maximum GPE number from FADT is too large: 0x%X",
193 gpe_number_max));
194 status = AE_BAD_VALUE;
195 goto cleanup;
196 }
197
198 cleanup:
199 (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
200 return_ACPI_STATUS(AE_OK);
201}
202
203/*******************************************************************************
204 *
205 * FUNCTION: acpi_ev_update_gpes
206 *
207 * PARAMETERS: table_owner_id - ID of the newly-loaded ACPI table
208 *
209 * RETURN: None
210 *
211 * DESCRIPTION: Check for new GPE methods (_Lxx/_Exx) made available as a
212 * result of a Load() or load_table() operation. If new GPE
213 * methods have been installed, register the new methods and
214 * enable and runtime GPEs that are associated with them. Also,
215 * run any newly loaded _PRW methods in order to discover any
216 * new CAN_WAKE GPEs.
217 *
218 ******************************************************************************/
219
220void acpi_ev_update_gpes(acpi_owner_id table_owner_id)
221{
222 struct acpi_gpe_xrupt_info *gpe_xrupt_info;
223 struct acpi_gpe_block_info *gpe_block;
224 struct acpi_gpe_walk_info walk_info;
225 acpi_status status = AE_OK;
226 u32 new_wake_gpe_count = 0;
227
228 /* We will examine only _PRW/_Lxx/_Exx methods owned by this table */
229
230 walk_info.owner_id = table_owner_id;
231 walk_info.execute_by_owner_id = TRUE;
232 walk_info.count = 0;
233
234 if (acpi_gbl_leave_wake_gpes_disabled) {
235 /*
236 * 1) Run any newly-loaded _PRW methods to find any GPEs that
237 * can now be marked as CAN_WAKE GPEs. Note: We must run the
238 * _PRW methods before we process the _Lxx/_Exx methods because
239 * we will enable all runtime GPEs associated with the new
240 * _Lxx/_Exx methods at the time we process those methods.
241 *
242 * Unlock interpreter so that we can run the _PRW methods.
243 */
244 walk_info.gpe_block = NULL;
245 walk_info.gpe_device = NULL;
246
247 acpi_ex_exit_interpreter();
248
249 status =
250 acpi_ns_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
251 ACPI_UINT32_MAX,
252 ACPI_NS_WALK_NO_UNLOCK,
253 acpi_ev_match_prw_and_gpe, NULL,
254 &walk_info, NULL);
255 if (ACPI_FAILURE(status)) {
256 ACPI_EXCEPTION((AE_INFO, status,
257 "While executing _PRW methods"));
258 }
259
260 acpi_ex_enter_interpreter();
261 new_wake_gpe_count = walk_info.count;
262 }
263
264 /*
265 * 2) Find any _Lxx/_Exx GPE methods that have just been loaded.
266 *
267 * Any GPEs that correspond to new _Lxx/_Exx methods and are not
268 * marked as CAN_WAKE are immediately enabled.
269 *
270 * Examine the namespace underneath each gpe_device within the
271 * gpe_block lists.
272 */
273 status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
274 if (ACPI_FAILURE(status)) {
275 return;
276 }
277
278 walk_info.count = 0;
279 walk_info.enable_this_gpe = TRUE;
280
281 /* Walk the interrupt level descriptor list */
282
283 gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head;
284 while (gpe_xrupt_info) {
285
286 /* Walk all Gpe Blocks attached to this interrupt level */
287
288 gpe_block = gpe_xrupt_info->gpe_block_list_head;
289 while (gpe_block) {
290 walk_info.gpe_block = gpe_block;
291 walk_info.gpe_device = gpe_block->node;
292
293 status = acpi_ns_walk_namespace(ACPI_TYPE_METHOD,
294 walk_info.gpe_device,
295 ACPI_UINT32_MAX,
296 ACPI_NS_WALK_NO_UNLOCK,
297 acpi_ev_match_gpe_method,
298 NULL, &walk_info, NULL);
299 if (ACPI_FAILURE(status)) {
300 ACPI_EXCEPTION((AE_INFO, status,
301 "While decoding _Lxx/_Exx methods"));
302 }
303
304 gpe_block = gpe_block->next;
305 }
306
307 gpe_xrupt_info = gpe_xrupt_info->next;
308 }
309
310 if (walk_info.count || new_wake_gpe_count) {
311 ACPI_INFO((AE_INFO,
312 "Enabled %u new runtime GPEs, added %u new wakeup GPEs",
313 walk_info.count, new_wake_gpe_count));
314 }
315
316 (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
317 return;
318}
319
320/*******************************************************************************
321 *
322 * FUNCTION: acpi_ev_match_gpe_method
323 *
324 * PARAMETERS: Callback from walk_namespace
325 *
326 * RETURN: Status
327 *
328 * DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a
329 * control method under the _GPE portion of the namespace.
330 * Extract the name and GPE type from the object, saving this
331 * information for quick lookup during GPE dispatch. Allows a
332 * per-owner_id evaluation if execute_by_owner_id is TRUE in the
333 * walk_info parameter block.
334 *
335 * The name of each GPE control method is of the form:
336 * "_Lxx" or "_Exx", where:
337 * L - means that the GPE is level triggered
338 * E - means that the GPE is edge triggered
339 * xx - is the GPE number [in HEX]
340 *
341 * If walk_info->execute_by_owner_id is TRUE, we only execute examine GPE methods
342 * with that owner.
343 * If walk_info->enable_this_gpe is TRUE, the GPE that is referred to by a GPE
344 * method is immediately enabled (Used for Load/load_table operators)
345 *
346 ******************************************************************************/
347
348acpi_status
349acpi_ev_match_gpe_method(acpi_handle obj_handle,
350 u32 level, void *context, void **return_value)
351{
352 struct acpi_namespace_node *method_node =
353 ACPI_CAST_PTR(struct acpi_namespace_node, obj_handle);
354 struct acpi_gpe_walk_info *walk_info =
355 ACPI_CAST_PTR(struct acpi_gpe_walk_info, context);
356 struct acpi_gpe_event_info *gpe_event_info;
357 struct acpi_namespace_node *gpe_device;
358 acpi_status status;
359 u32 gpe_number;
360 char name[ACPI_NAME_SIZE + 1];
361 u8 type;
362
363 ACPI_FUNCTION_TRACE(ev_match_gpe_method);
364
365 /* Check if requested owner_id matches this owner_id */
366
367 if ((walk_info->execute_by_owner_id) &&
368 (method_node->owner_id != walk_info->owner_id)) {
369 return_ACPI_STATUS(AE_OK);
370 }
371
372 /*
373 * Match and decode the _Lxx and _Exx GPE method names
374 *
375 * 1) Extract the method name and null terminate it
376 */
377 ACPI_MOVE_32_TO_32(name, &method_node->name.integer);
378 name[ACPI_NAME_SIZE] = 0;
379
380 /* 2) Name must begin with an underscore */
381
382 if (name[0] != '_') {
383 return_ACPI_STATUS(AE_OK); /* Ignore this method */
384 }
385
386 /*
387 * 3) Edge/Level determination is based on the 2nd character
388 * of the method name
389 *
390 * NOTE: Default GPE type is RUNTIME only. Later, if a _PRW object is
391 * found that points to this GPE, the ACPI_GPE_CAN_WAKE flag is set.
392 */
393 switch (name[1]) {
394 case 'L':
395 type = ACPI_GPE_LEVEL_TRIGGERED;
396 break;
397
398 case 'E':
399 type = ACPI_GPE_EDGE_TRIGGERED;
400 break;
401
402 default:
403 /* Unknown method type, just ignore it */
404
405 ACPI_DEBUG_PRINT((ACPI_DB_LOAD,
406 "Ignoring unknown GPE method type: %s "
407 "(name not of form _Lxx or _Exx)", name));
408 return_ACPI_STATUS(AE_OK);
409 }
410
411 /* 4) The last two characters of the name are the hex GPE Number */
412
413 gpe_number = ACPI_STRTOUL(&name[2], NULL, 16);
414 if (gpe_number == ACPI_UINT32_MAX) {
415
416 /* Conversion failed; invalid method, just ignore it */
417
418 ACPI_DEBUG_PRINT((ACPI_DB_LOAD,
419 "Could not extract GPE number from name: %s "
420 "(name is not of form _Lxx or _Exx)", name));
421 return_ACPI_STATUS(AE_OK);
422 }
423
424 /* Ensure that we have a valid GPE number for this GPE block */
425
426 gpe_event_info =
427 acpi_ev_low_get_gpe_info(gpe_number, walk_info->gpe_block);
428 if (!gpe_event_info) {
429 /*
430 * This gpe_number is not valid for this GPE block, just ignore it.
431 * However, it may be valid for a different GPE block, since GPE0
432 * and GPE1 methods both appear under \_GPE.
433 */
434 return_ACPI_STATUS(AE_OK);
435 }
436
437 if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
438 ACPI_GPE_DISPATCH_HANDLER) {
439
440 /* If there is already a handler, ignore this GPE method */
441
442 return_ACPI_STATUS(AE_OK);
443 }
444
445 if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
446 ACPI_GPE_DISPATCH_METHOD) {
447 /*
448 * If there is already a method, ignore this method. But check
449 * for a type mismatch (if both the _Lxx AND _Exx exist)
450 */
451 if (type != (gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK)) {
452 ACPI_ERROR((AE_INFO,
453 "For GPE 0x%.2X, found both _L%2.2X and _E%2.2X methods",
454 gpe_number, gpe_number, gpe_number));
455 }
456 return_ACPI_STATUS(AE_OK);
457 }
458
459 /*
460 * Add the GPE information from above to the gpe_event_info block for
461 * use during dispatch of this GPE.
462 */
463 gpe_event_info->flags |= (u8)(type | ACPI_GPE_DISPATCH_METHOD);
464 gpe_event_info->dispatch.method_node = method_node;
465
466 /*
467 * Enable this GPE if requested. This only happens when during the
468 * execution of a Load or load_table operator. We have found a new
469 * GPE method and want to immediately enable the GPE if it is a
470 * runtime GPE.
471 */
472 if (walk_info->enable_this_gpe) {
473
474 /* Ignore GPEs that can wake the system */
475
476 if (!(gpe_event_info->flags & ACPI_GPE_CAN_WAKE) ||
477 !acpi_gbl_leave_wake_gpes_disabled) {
478 walk_info->count++;
479 gpe_device = walk_info->gpe_device;
480
481 if (gpe_device == acpi_gbl_fadt_gpe_device) {
482 gpe_device = NULL;
483 }
484
485 status = acpi_enable_gpe(gpe_device, gpe_number,
486 ACPI_GPE_TYPE_RUNTIME);
487 if (ACPI_FAILURE(status)) {
488 ACPI_EXCEPTION((AE_INFO, status,
489 "Could not enable GPE 0x%02X",
490 gpe_number));
491 }
492 }
493 }
494
495 ACPI_DEBUG_PRINT((ACPI_DB_LOAD,
496 "Registered GPE method %s as GPE number 0x%.2X\n",
497 name, gpe_number));
498 return_ACPI_STATUS(AE_OK);
499}
500
501/*******************************************************************************
502 *
503 * FUNCTION: acpi_ev_match_prw_and_gpe
504 *
505 * PARAMETERS: Callback from walk_namespace
506 *
507 * RETURN: Status. NOTE: We ignore errors so that the _PRW walk is
508 * not aborted on a single _PRW failure.
509 *
510 * DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a
511 * Device. Run the _PRW method. If present, extract the GPE
512 * number and mark the GPE as a CAN_WAKE GPE. Allows a
513 * per-owner_id execution if execute_by_owner_id is TRUE in the
514 * walk_info parameter block.
515 *
516 * If walk_info->execute_by_owner_id is TRUE, we only execute _PRWs with that
517 * owner.
518 * If walk_info->gpe_device is NULL, we execute every _PRW found. Otherwise,
519 * we only execute _PRWs that refer to the input gpe_device.
520 *
521 ******************************************************************************/
522
523acpi_status
524acpi_ev_match_prw_and_gpe(acpi_handle obj_handle,
525 u32 level, void *context, void **return_value)
526{
527 struct acpi_gpe_walk_info *walk_info =
528 ACPI_CAST_PTR(struct acpi_gpe_walk_info, context);
529 struct acpi_namespace_node *gpe_device;
530 struct acpi_gpe_block_info *gpe_block;
531 struct acpi_namespace_node *target_gpe_device;
532 struct acpi_namespace_node *prw_node;
533 struct acpi_gpe_event_info *gpe_event_info;
534 union acpi_operand_object *pkg_desc;
535 union acpi_operand_object *obj_desc;
536 u32 gpe_number;
537 acpi_status status;
538
539 ACPI_FUNCTION_TRACE(ev_match_prw_and_gpe);
540
541 /* Check for a _PRW method under this device */
542
543 status = acpi_ns_get_node(obj_handle, METHOD_NAME__PRW,
544 ACPI_NS_NO_UPSEARCH, &prw_node);
545 if (ACPI_FAILURE(status)) {
546 return_ACPI_STATUS(AE_OK);
547 }
548
549 /* Check if requested owner_id matches this owner_id */
550
551 if ((walk_info->execute_by_owner_id) &&
552 (prw_node->owner_id != walk_info->owner_id)) {
553 return_ACPI_STATUS(AE_OK);
554 }
555
556 /* Execute the _PRW */
557
558 status = acpi_ut_evaluate_object(prw_node, NULL,
559 ACPI_BTYPE_PACKAGE, &pkg_desc);
560 if (ACPI_FAILURE(status)) {
561 return_ACPI_STATUS(AE_OK);
562 }
563
564 /* The returned _PRW package must have at least two elements */
565
566 if (pkg_desc->package.count < 2) {
567 goto cleanup;
568 }
569
570 /* Extract pointers from the input context */
571
572 gpe_device = walk_info->gpe_device;
573 gpe_block = walk_info->gpe_block;
574
575 /*
576 * The _PRW object must return a package, we are only interested
577 * in the first element
578 */
579 obj_desc = pkg_desc->package.elements[0];
580
581 if (obj_desc->common.type == ACPI_TYPE_INTEGER) {
582
583 /* Use FADT-defined GPE device (from definition of _PRW) */
584
585 target_gpe_device = NULL;
586 if (gpe_device) {
587 target_gpe_device = acpi_gbl_fadt_gpe_device;
588 }
589
590 /* Integer is the GPE number in the FADT described GPE blocks */
591
592 gpe_number = (u32)obj_desc->integer.value;
593 } else if (obj_desc->common.type == ACPI_TYPE_PACKAGE) {
594
595 /* Package contains a GPE reference and GPE number within a GPE block */
596
597 if ((obj_desc->package.count < 2) ||
598 ((obj_desc->package.elements[0])->common.type !=
599 ACPI_TYPE_LOCAL_REFERENCE) ||
600 ((obj_desc->package.elements[1])->common.type !=
601 ACPI_TYPE_INTEGER)) {
602 goto cleanup;
603 }
604
605 /* Get GPE block reference and decode */
606
607 target_gpe_device =
608 obj_desc->package.elements[0]->reference.node;
609 gpe_number = (u32)obj_desc->package.elements[1]->integer.value;
610 } else {
611 /* Unknown type, just ignore it */
612
613 goto cleanup;
614 }
615
616 /* Get the gpe_event_info for this GPE */
617
618 if (gpe_device) {
619 /*
620 * Is this GPE within this block?
621 *
622 * TRUE if and only if these conditions are true:
623 * 1) The GPE devices match.
624 * 2) The GPE index(number) is within the range of the Gpe Block
625 * associated with the GPE device.
626 */
627 if (gpe_device != target_gpe_device) {
628 goto cleanup;
629 }
630
631 gpe_event_info =
632 acpi_ev_low_get_gpe_info(gpe_number, gpe_block);
633 } else {
634 /* gpe_device is NULL, just match the target_device and gpe_number */
635
636 gpe_event_info =
637 acpi_ev_get_gpe_event_info(target_gpe_device, gpe_number);
638 }
639
640 if (gpe_event_info) {
641 if (!(gpe_event_info->flags & ACPI_GPE_CAN_WAKE)) {
642
643 /* This GPE can wake the system */
644
645 gpe_event_info->flags |= ACPI_GPE_CAN_WAKE;
646 walk_info->count++;
647 }
648 }
649
650 cleanup:
651 acpi_ut_remove_reference(pkg_desc);
652 return_ACPI_STATUS(AE_OK);
653}
diff --git a/drivers/acpi/acpica/evgpeutil.c b/drivers/acpi/acpica/evgpeutil.c
new file mode 100644
index 000000000000..19a0e513ea48
--- /dev/null
+++ b/drivers/acpi/acpica/evgpeutil.c
@@ -0,0 +1,337 @@
1/******************************************************************************
2 *
3 * Module Name: evgpeutil - GPE utilities
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2010, Intel Corp.
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions, and the following disclaimer,
16 * without modification.
17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18 * substantially similar to the "NO WARRANTY" disclaimer below
19 * ("Disclaimer") and any redistribution must be conditioned upon
20 * including a substantially similar Disclaimer requirement for further
21 * binary redistribution.
22 * 3. Neither the names of the above-listed copyright holders nor the names
23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
25 *
26 * Alternatively, this software may be distributed under the terms of the
27 * GNU General Public License ("GPL") version 2 as published by the Free
28 * Software Foundation.
29 *
30 * NO WARRANTY
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41 * POSSIBILITY OF SUCH DAMAGES.
42 */
43
44#include <acpi/acpi.h>
45#include "accommon.h"
46#include "acevents.h"
47
48#define _COMPONENT ACPI_EVENTS
49ACPI_MODULE_NAME("evgpeutil")
50
51/*******************************************************************************
52 *
53 * FUNCTION: acpi_ev_walk_gpe_list
54 *
55 * PARAMETERS: gpe_walk_callback - Routine called for each GPE block
56 * Context - Value passed to callback
57 *
58 * RETURN: Status
59 *
60 * DESCRIPTION: Walk the GPE lists.
61 *
62 ******************************************************************************/
63acpi_status
64acpi_ev_walk_gpe_list(acpi_gpe_callback gpe_walk_callback, void *context)
65{
66 struct acpi_gpe_block_info *gpe_block;
67 struct acpi_gpe_xrupt_info *gpe_xrupt_info;
68 acpi_status status = AE_OK;
69 acpi_cpu_flags flags;
70
71 ACPI_FUNCTION_TRACE(ev_walk_gpe_list);
72
73 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
74
75 /* Walk the interrupt level descriptor list */
76
77 gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head;
78 while (gpe_xrupt_info) {
79
80 /* Walk all Gpe Blocks attached to this interrupt level */
81
82 gpe_block = gpe_xrupt_info->gpe_block_list_head;
83 while (gpe_block) {
84
85 /* One callback per GPE block */
86
87 status =
88 gpe_walk_callback(gpe_xrupt_info, gpe_block,
89 context);
90 if (ACPI_FAILURE(status)) {
91 if (status == AE_CTRL_END) { /* Callback abort */
92 status = AE_OK;
93 }
94 goto unlock_and_exit;
95 }
96
97 gpe_block = gpe_block->next;
98 }
99
100 gpe_xrupt_info = gpe_xrupt_info->next;
101 }
102
103 unlock_and_exit:
104 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
105 return_ACPI_STATUS(status);
106}
107
108/*******************************************************************************
109 *
110 * FUNCTION: acpi_ev_valid_gpe_event
111 *
112 * PARAMETERS: gpe_event_info - Info for this GPE
113 *
114 * RETURN: TRUE if the gpe_event is valid
115 *
116 * DESCRIPTION: Validate a GPE event. DO NOT CALL FROM INTERRUPT LEVEL.
117 * Should be called only when the GPE lists are semaphore locked
118 * and not subject to change.
119 *
120 ******************************************************************************/
121
122u8 acpi_ev_valid_gpe_event(struct acpi_gpe_event_info *gpe_event_info)
123{
124 struct acpi_gpe_xrupt_info *gpe_xrupt_block;
125 struct acpi_gpe_block_info *gpe_block;
126
127 ACPI_FUNCTION_ENTRY();
128
129 /* No need for spin lock since we are not changing any list elements */
130
131 /* Walk the GPE interrupt levels */
132
133 gpe_xrupt_block = acpi_gbl_gpe_xrupt_list_head;
134 while (gpe_xrupt_block) {
135 gpe_block = gpe_xrupt_block->gpe_block_list_head;
136
137 /* Walk the GPE blocks on this interrupt level */
138
139 while (gpe_block) {
140 if ((&gpe_block->event_info[0] <= gpe_event_info) &&
141 (&gpe_block->event_info[gpe_block->gpe_count] >
142 gpe_event_info)) {
143 return (TRUE);
144 }
145
146 gpe_block = gpe_block->next;
147 }
148
149 gpe_xrupt_block = gpe_xrupt_block->next;
150 }
151
152 return (FALSE);
153}
154
155/*******************************************************************************
156 *
157 * FUNCTION: acpi_ev_get_gpe_xrupt_block
158 *
159 * PARAMETERS: interrupt_number - Interrupt for a GPE block
160 *
161 * RETURN: A GPE interrupt block
162 *
163 * DESCRIPTION: Get or Create a GPE interrupt block. There is one interrupt
164 * block per unique interrupt level used for GPEs. Should be
165 * called only when the GPE lists are semaphore locked and not
166 * subject to change.
167 *
168 ******************************************************************************/
169
170struct acpi_gpe_xrupt_info *acpi_ev_get_gpe_xrupt_block(u32 interrupt_number)
171{
172 struct acpi_gpe_xrupt_info *next_gpe_xrupt;
173 struct acpi_gpe_xrupt_info *gpe_xrupt;
174 acpi_status status;
175 acpi_cpu_flags flags;
176
177 ACPI_FUNCTION_TRACE(ev_get_gpe_xrupt_block);
178
179 /* No need for lock since we are not changing any list elements here */
180
181 next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head;
182 while (next_gpe_xrupt) {
183 if (next_gpe_xrupt->interrupt_number == interrupt_number) {
184 return_PTR(next_gpe_xrupt);
185 }
186
187 next_gpe_xrupt = next_gpe_xrupt->next;
188 }
189
190 /* Not found, must allocate a new xrupt descriptor */
191
192 gpe_xrupt = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_xrupt_info));
193 if (!gpe_xrupt) {
194 return_PTR(NULL);
195 }
196
197 gpe_xrupt->interrupt_number = interrupt_number;
198
199 /* Install new interrupt descriptor with spin lock */
200
201 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
202 if (acpi_gbl_gpe_xrupt_list_head) {
203 next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head;
204 while (next_gpe_xrupt->next) {
205 next_gpe_xrupt = next_gpe_xrupt->next;
206 }
207
208 next_gpe_xrupt->next = gpe_xrupt;
209 gpe_xrupt->previous = next_gpe_xrupt;
210 } else {
211 acpi_gbl_gpe_xrupt_list_head = gpe_xrupt;
212 }
213 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
214
215 /* Install new interrupt handler if not SCI_INT */
216
217 if (interrupt_number != acpi_gbl_FADT.sci_interrupt) {
218 status = acpi_os_install_interrupt_handler(interrupt_number,
219 acpi_ev_gpe_xrupt_handler,
220 gpe_xrupt);
221 if (ACPI_FAILURE(status)) {
222 ACPI_ERROR((AE_INFO,
223 "Could not install GPE interrupt handler at level 0x%X",
224 interrupt_number));
225 return_PTR(NULL);
226 }
227 }
228
229 return_PTR(gpe_xrupt);
230}
231
232/*******************************************************************************
233 *
234 * FUNCTION: acpi_ev_delete_gpe_xrupt
235 *
236 * PARAMETERS: gpe_xrupt - A GPE interrupt info block
237 *
238 * RETURN: Status
239 *
240 * DESCRIPTION: Remove and free a gpe_xrupt block. Remove an associated
241 * interrupt handler if not the SCI interrupt.
242 *
243 ******************************************************************************/
244
245acpi_status acpi_ev_delete_gpe_xrupt(struct acpi_gpe_xrupt_info *gpe_xrupt)
246{
247 acpi_status status;
248 acpi_cpu_flags flags;
249
250 ACPI_FUNCTION_TRACE(ev_delete_gpe_xrupt);
251
252 /* We never want to remove the SCI interrupt handler */
253
254 if (gpe_xrupt->interrupt_number == acpi_gbl_FADT.sci_interrupt) {
255 gpe_xrupt->gpe_block_list_head = NULL;
256 return_ACPI_STATUS(AE_OK);
257 }
258
259 /* Disable this interrupt */
260
261 status =
262 acpi_os_remove_interrupt_handler(gpe_xrupt->interrupt_number,
263 acpi_ev_gpe_xrupt_handler);
264 if (ACPI_FAILURE(status)) {
265 return_ACPI_STATUS(status);
266 }
267
268 /* Unlink the interrupt block with lock */
269
270 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
271 if (gpe_xrupt->previous) {
272 gpe_xrupt->previous->next = gpe_xrupt->next;
273 } else {
274 /* No previous, update list head */
275
276 acpi_gbl_gpe_xrupt_list_head = gpe_xrupt->next;
277 }
278
279 if (gpe_xrupt->next) {
280 gpe_xrupt->next->previous = gpe_xrupt->previous;
281 }
282 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
283
284 /* Free the block */
285
286 ACPI_FREE(gpe_xrupt);
287 return_ACPI_STATUS(AE_OK);
288}
289
290/*******************************************************************************
291 *
292 * FUNCTION: acpi_ev_delete_gpe_handlers
293 *
294 * PARAMETERS: gpe_xrupt_info - GPE Interrupt info
295 * gpe_block - Gpe Block info
296 *
297 * RETURN: Status
298 *
299 * DESCRIPTION: Delete all Handler objects found in the GPE data structs.
300 * Used only prior to termination.
301 *
302 ******************************************************************************/
303
304acpi_status
305acpi_ev_delete_gpe_handlers(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
306 struct acpi_gpe_block_info *gpe_block,
307 void *context)
308{
309 struct acpi_gpe_event_info *gpe_event_info;
310 u32 i;
311 u32 j;
312
313 ACPI_FUNCTION_TRACE(ev_delete_gpe_handlers);
314
315 /* Examine each GPE Register within the block */
316
317 for (i = 0; i < gpe_block->register_count; i++) {
318
319 /* Now look at the individual GPEs in this byte register */
320
321 for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) {
322 gpe_event_info = &gpe_block->event_info[((acpi_size) i *
323 ACPI_GPE_REGISTER_WIDTH)
324 + j];
325
326 if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
327 ACPI_GPE_DISPATCH_HANDLER) {
328 ACPI_FREE(gpe_event_info->dispatch.handler);
329 gpe_event_info->dispatch.handler = NULL;
330 gpe_event_info->flags &=
331 ~ACPI_GPE_DISPATCH_MASK;
332 }
333 }
334 }
335
336 return_ACPI_STATUS(AE_OK);
337}
generated by cgit v1.2.2 (git 2.25.0) at 2025-11-01 12:10:55 -0400