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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: evregion - ACPI address_space (op_region) handler dispatch | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
4a90c7e8 | 8 | * Copyright (C) 2000 - 2006, R. Byron Moore |
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 | ||
1da177e4 LT |
44 | #include <acpi/acpi.h> |
45 | #include <acpi/acevents.h> | |
46 | #include <acpi/acnamesp.h> | |
47 | #include <acpi/acinterp.h> | |
48 | ||
49 | #define _COMPONENT ACPI_EVENTS | |
4be44fcd | 50 | ACPI_MODULE_NAME("evregion") |
1da177e4 | 51 | #define ACPI_NUM_DEFAULT_SPACES 4 |
4be44fcd LB |
52 | static u8 acpi_gbl_default_address_spaces[ACPI_NUM_DEFAULT_SPACES] = { |
53 | ACPI_ADR_SPACE_SYSTEM_MEMORY, | |
54 | ACPI_ADR_SPACE_SYSTEM_IO, | |
55 | ACPI_ADR_SPACE_PCI_CONFIG, | |
56 | ACPI_ADR_SPACE_DATA_TABLE | |
57 | }; | |
1da177e4 | 58 | |
44f6c012 RM |
59 | /* Local prototypes */ |
60 | ||
61 | static acpi_status | |
4be44fcd LB |
62 | acpi_ev_reg_run(acpi_handle obj_handle, |
63 | u32 level, void *context, void **return_value); | |
44f6c012 RM |
64 | |
65 | static acpi_status | |
4be44fcd LB |
66 | acpi_ev_install_handler(acpi_handle obj_handle, |
67 | u32 level, void *context, void **return_value); | |
1da177e4 LT |
68 | |
69 | /******************************************************************************* | |
70 | * | |
71 | * FUNCTION: acpi_ev_install_region_handlers | |
72 | * | |
73 | * PARAMETERS: None | |
74 | * | |
75 | * RETURN: Status | |
76 | * | |
77 | * DESCRIPTION: Installs the core subsystem default address space handlers. | |
78 | * | |
79 | ******************************************************************************/ | |
80 | ||
4be44fcd LB |
81 | acpi_status acpi_ev_install_region_handlers(void) |
82 | { | |
83 | acpi_status status; | |
84 | acpi_native_uint i; | |
1da177e4 | 85 | |
4be44fcd | 86 | ACPI_FUNCTION_TRACE("ev_install_region_handlers"); |
1da177e4 | 87 | |
4be44fcd LB |
88 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
89 | if (ACPI_FAILURE(status)) { | |
90 | return_ACPI_STATUS(status); | |
1da177e4 LT |
91 | } |
92 | ||
93 | /* | |
94 | * All address spaces (PCI Config, EC, SMBus) are scope dependent | |
95 | * and registration must occur for a specific device. | |
96 | * | |
97 | * In the case of the system memory and IO address spaces there is currently | |
98 | * no device associated with the address space. For these we use the root. | |
99 | * | |
100 | * We install the default PCI config space handler at the root so | |
101 | * that this space is immediately available even though the we have | |
102 | * not enumerated all the PCI Root Buses yet. This is to conform | |
103 | * to the ACPI specification which states that the PCI config | |
104 | * space must be always available -- even though we are nowhere | |
105 | * near ready to find the PCI root buses at this point. | |
106 | * | |
107 | * NOTE: We ignore AE_ALREADY_EXISTS because this means that a handler | |
108 | * has already been installed (via acpi_install_address_space_handler). | |
109 | * Similar for AE_SAME_HANDLER. | |
110 | */ | |
111 | for (i = 0; i < ACPI_NUM_DEFAULT_SPACES; i++) { | |
4be44fcd LB |
112 | status = acpi_ev_install_space_handler(acpi_gbl_root_node, |
113 | acpi_gbl_default_address_spaces | |
114 | [i], | |
115 | ACPI_DEFAULT_HANDLER, | |
116 | NULL, NULL); | |
1da177e4 LT |
117 | switch (status) { |
118 | case AE_OK: | |
119 | case AE_SAME_HANDLER: | |
120 | case AE_ALREADY_EXISTS: | |
121 | ||
122 | /* These exceptions are all OK */ | |
123 | ||
124 | status = AE_OK; | |
125 | break; | |
126 | ||
127 | default: | |
128 | ||
129 | goto unlock_and_exit; | |
130 | } | |
131 | } | |
132 | ||
4be44fcd LB |
133 | unlock_and_exit: |
134 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); | |
135 | return_ACPI_STATUS(status); | |
1da177e4 LT |
136 | } |
137 | ||
1da177e4 LT |
138 | /******************************************************************************* |
139 | * | |
140 | * FUNCTION: acpi_ev_initialize_op_regions | |
141 | * | |
142 | * PARAMETERS: None | |
143 | * | |
144 | * RETURN: Status | |
145 | * | |
146 | * DESCRIPTION: Execute _REG methods for all Operation Regions that have | |
147 | * an installed default region handler. | |
148 | * | |
149 | ******************************************************************************/ | |
150 | ||
4be44fcd | 151 | acpi_status acpi_ev_initialize_op_regions(void) |
1da177e4 | 152 | { |
4be44fcd LB |
153 | acpi_status status; |
154 | acpi_native_uint i; | |
1da177e4 | 155 | |
4be44fcd | 156 | ACPI_FUNCTION_TRACE("ev_initialize_op_regions"); |
1da177e4 | 157 | |
4be44fcd LB |
158 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
159 | if (ACPI_FAILURE(status)) { | |
160 | return_ACPI_STATUS(status); | |
1da177e4 LT |
161 | } |
162 | ||
163 | /* | |
164 | * Run the _REG methods for op_regions in each default address space | |
165 | */ | |
166 | for (i = 0; i < ACPI_NUM_DEFAULT_SPACES; i++) { | |
52fc0b02 | 167 | |
1da177e4 LT |
168 | /* TBD: Make sure handler is the DEFAULT handler, otherwise |
169 | * _REG will have already been run. | |
170 | */ | |
4be44fcd LB |
171 | status = acpi_ev_execute_reg_methods(acpi_gbl_root_node, |
172 | acpi_gbl_default_address_spaces | |
173 | [i]); | |
1da177e4 LT |
174 | } |
175 | ||
4be44fcd LB |
176 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
177 | return_ACPI_STATUS(status); | |
1da177e4 LT |
178 | } |
179 | ||
1da177e4 LT |
180 | /******************************************************************************* |
181 | * | |
182 | * FUNCTION: acpi_ev_execute_reg_method | |
183 | * | |
44f6c012 RM |
184 | * PARAMETERS: region_obj - Region object |
185 | * Function - Passed to _REG: On (1) or Off (0) | |
1da177e4 LT |
186 | * |
187 | * RETURN: Status | |
188 | * | |
189 | * DESCRIPTION: Execute _REG method for a region | |
190 | * | |
191 | ******************************************************************************/ | |
192 | ||
193 | acpi_status | |
4be44fcd | 194 | acpi_ev_execute_reg_method(union acpi_operand_object *region_obj, u32 function) |
1da177e4 | 195 | { |
4be44fcd LB |
196 | struct acpi_parameter_info info; |
197 | union acpi_operand_object *params[3]; | |
198 | union acpi_operand_object *region_obj2; | |
199 | acpi_status status; | |
1da177e4 | 200 | |
4be44fcd | 201 | ACPI_FUNCTION_TRACE("ev_execute_reg_method"); |
1da177e4 | 202 | |
4be44fcd | 203 | region_obj2 = acpi_ns_get_secondary_object(region_obj); |
1da177e4 | 204 | if (!region_obj2) { |
4be44fcd | 205 | return_ACPI_STATUS(AE_NOT_EXIST); |
1da177e4 LT |
206 | } |
207 | ||
208 | if (region_obj2->extra.method_REG == NULL) { | |
4be44fcd | 209 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
210 | } |
211 | ||
212 | /* | |
213 | * The _REG method has two arguments: | |
214 | * | |
215 | * Arg0, Integer: Operation region space ID | |
216 | * Same value as region_obj->Region.space_id | |
217 | * Arg1, Integer: connection status | |
218 | * 1 for connecting the handler, | |
219 | * 0 for disconnecting the handler | |
220 | * Passed as a parameter | |
221 | */ | |
4be44fcd | 222 | params[0] = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER); |
1da177e4 | 223 | if (!params[0]) { |
4be44fcd | 224 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
225 | } |
226 | ||
4be44fcd | 227 | params[1] = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER); |
1da177e4 LT |
228 | if (!params[1]) { |
229 | status = AE_NO_MEMORY; | |
230 | goto cleanup; | |
231 | } | |
232 | ||
233 | /* Setup the parameter objects */ | |
234 | ||
235 | params[0]->integer.value = region_obj->region.space_id; | |
236 | params[1]->integer.value = function; | |
237 | params[2] = NULL; | |
238 | ||
239 | info.node = region_obj2->extra.method_REG; | |
240 | info.parameters = params; | |
241 | info.parameter_type = ACPI_PARAM_ARGS; | |
242 | ||
243 | /* Execute the method, no return value */ | |
244 | ||
4be44fcd LB |
245 | ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname |
246 | (ACPI_TYPE_METHOD, info.node, NULL)); | |
247 | status = acpi_ns_evaluate_by_handle(&info); | |
1da177e4 | 248 | |
4be44fcd | 249 | acpi_ut_remove_reference(params[1]); |
1da177e4 | 250 | |
4be44fcd LB |
251 | cleanup: |
252 | acpi_ut_remove_reference(params[0]); | |
1da177e4 | 253 | |
4be44fcd | 254 | return_ACPI_STATUS(status); |
1da177e4 LT |
255 | } |
256 | ||
1da177e4 LT |
257 | /******************************************************************************* |
258 | * | |
259 | * FUNCTION: acpi_ev_address_space_dispatch | |
260 | * | |
261 | * PARAMETERS: region_obj - Internal region object | |
262 | * Function - Read or Write operation | |
263 | * Address - Where in the space to read or write | |
264 | * bit_width - Field width in bits (8, 16, 32, or 64) | |
265 | * Value - Pointer to in or out value | |
266 | * | |
267 | * RETURN: Status | |
268 | * | |
269 | * DESCRIPTION: Dispatch an address space or operation region access to | |
270 | * a previously installed handler. | |
271 | * | |
272 | ******************************************************************************/ | |
273 | ||
274 | acpi_status | |
4be44fcd LB |
275 | acpi_ev_address_space_dispatch(union acpi_operand_object *region_obj, |
276 | u32 function, | |
277 | acpi_physical_address address, | |
278 | u32 bit_width, void *value) | |
1da177e4 | 279 | { |
4be44fcd LB |
280 | acpi_status status; |
281 | acpi_status status2; | |
282 | acpi_adr_space_handler handler; | |
283 | acpi_adr_space_setup region_setup; | |
284 | union acpi_operand_object *handler_desc; | |
285 | union acpi_operand_object *region_obj2; | |
286 | void *region_context = NULL; | |
1da177e4 | 287 | |
4be44fcd | 288 | ACPI_FUNCTION_TRACE("ev_address_space_dispatch"); |
1da177e4 | 289 | |
4be44fcd | 290 | region_obj2 = acpi_ns_get_secondary_object(region_obj); |
1da177e4 | 291 | if (!region_obj2) { |
4be44fcd | 292 | return_ACPI_STATUS(AE_NOT_EXIST); |
1da177e4 LT |
293 | } |
294 | ||
295 | /* Ensure that there is a handler associated with this region */ | |
296 | ||
297 | handler_desc = region_obj->region.handler; | |
298 | if (!handler_desc) { | |
b8e4d893 BM |
299 | ACPI_ERROR((AE_INFO, |
300 | "No handler for Region [%4.4s] (%p) [%s]", | |
301 | acpi_ut_get_node_name(region_obj->region.node), | |
302 | region_obj, | |
303 | acpi_ut_get_region_name(region_obj->region. | |
304 | space_id))); | |
4be44fcd LB |
305 | |
306 | return_ACPI_STATUS(AE_NOT_EXIST); | |
1da177e4 LT |
307 | } |
308 | ||
309 | /* | |
310 | * It may be the case that the region has never been initialized | |
311 | * Some types of regions require special init code | |
312 | */ | |
313 | if (!(region_obj->region.flags & AOPOBJ_SETUP_COMPLETE)) { | |
314 | /* | |
315 | * This region has not been initialized yet, do it | |
316 | */ | |
317 | region_setup = handler_desc->address_space.setup; | |
318 | if (!region_setup) { | |
52fc0b02 | 319 | |
1da177e4 LT |
320 | /* No initialization routine, exit with error */ |
321 | ||
b8e4d893 BM |
322 | ACPI_ERROR((AE_INFO, |
323 | "No init routine for region(%p) [%s]", | |
324 | region_obj, | |
325 | acpi_ut_get_region_name(region_obj->region. | |
326 | space_id))); | |
4be44fcd | 327 | return_ACPI_STATUS(AE_NOT_EXIST); |
1da177e4 LT |
328 | } |
329 | ||
330 | /* | |
44f6c012 RM |
331 | * We must exit the interpreter because the region |
332 | * setup will potentially execute control methods | |
333 | * (e.g., _REG method for this region) | |
1da177e4 | 334 | */ |
4be44fcd | 335 | acpi_ex_exit_interpreter(); |
1da177e4 | 336 | |
4be44fcd LB |
337 | status = region_setup(region_obj, ACPI_REGION_ACTIVATE, |
338 | handler_desc->address_space.context, | |
339 | ®ion_context); | |
1da177e4 LT |
340 | |
341 | /* Re-enter the interpreter */ | |
342 | ||
4be44fcd LB |
343 | status2 = acpi_ex_enter_interpreter(); |
344 | if (ACPI_FAILURE(status2)) { | |
345 | return_ACPI_STATUS(status2); | |
1da177e4 LT |
346 | } |
347 | ||
348 | /* Check for failure of the Region Setup */ | |
349 | ||
4be44fcd | 350 | if (ACPI_FAILURE(status)) { |
b8e4d893 BM |
351 | ACPI_EXCEPTION((AE_INFO, status, |
352 | "During region initialization: [%s]", | |
353 | acpi_ut_get_region_name(region_obj-> | |
354 | region. | |
355 | space_id))); | |
4be44fcd | 356 | return_ACPI_STATUS(status); |
1da177e4 LT |
357 | } |
358 | ||
359 | /* | |
360 | * Region initialization may have been completed by region_setup | |
361 | */ | |
362 | if (!(region_obj->region.flags & AOPOBJ_SETUP_COMPLETE)) { | |
363 | region_obj->region.flags |= AOPOBJ_SETUP_COMPLETE; | |
364 | ||
365 | if (region_obj2->extra.region_context) { | |
52fc0b02 | 366 | |
1da177e4 LT |
367 | /* The handler for this region was already installed */ |
368 | ||
8313524a | 369 | ACPI_FREE(region_context); |
4be44fcd | 370 | } else { |
1da177e4 LT |
371 | /* |
372 | * Save the returned context for use in all accesses to | |
373 | * this particular region | |
374 | */ | |
4be44fcd LB |
375 | region_obj2->extra.region_context = |
376 | region_context; | |
1da177e4 LT |
377 | } |
378 | } | |
379 | } | |
380 | ||
381 | /* We have everything we need, we can invoke the address space handler */ | |
382 | ||
383 | handler = handler_desc->address_space.handler; | |
384 | ||
4be44fcd LB |
385 | ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, |
386 | "Handler %p (@%p) Address %8.8X%8.8X [%s]\n", | |
387 | ®ion_obj->region.handler->address_space, handler, | |
388 | ACPI_FORMAT_UINT64(address), | |
389 | acpi_ut_get_region_name(region_obj->region. | |
390 | space_id))); | |
1da177e4 | 391 | |
4be44fcd LB |
392 | if (! |
393 | (handler_desc->address_space. | |
394 | hflags & ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)) { | |
1da177e4 LT |
395 | /* |
396 | * For handlers other than the default (supplied) handlers, we must | |
397 | * exit the interpreter because the handler *might* block -- we don't | |
398 | * know what it will do, so we can't hold the lock on the intepreter. | |
399 | */ | |
400 | acpi_ex_exit_interpreter(); | |
401 | } | |
402 | ||
403 | /* Call the handler */ | |
404 | ||
4be44fcd | 405 | status = handler(function, address, bit_width, value, |
1da177e4 LT |
406 | handler_desc->address_space.context, |
407 | region_obj2->extra.region_context); | |
408 | ||
4be44fcd | 409 | if (ACPI_FAILURE(status)) { |
b8e4d893 BM |
410 | ACPI_EXCEPTION((AE_INFO, status, "Returned by Handler for [%s]", |
411 | acpi_ut_get_region_name(region_obj->region. | |
412 | space_id))); | |
1da177e4 LT |
413 | } |
414 | ||
4be44fcd LB |
415 | if (! |
416 | (handler_desc->address_space. | |
417 | hflags & ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)) { | |
1da177e4 LT |
418 | /* |
419 | * We just returned from a non-default handler, we must re-enter the | |
420 | * interpreter | |
421 | */ | |
4be44fcd LB |
422 | status2 = acpi_ex_enter_interpreter(); |
423 | if (ACPI_FAILURE(status2)) { | |
424 | return_ACPI_STATUS(status2); | |
1da177e4 LT |
425 | } |
426 | } | |
427 | ||
4be44fcd | 428 | return_ACPI_STATUS(status); |
1da177e4 LT |
429 | } |
430 | ||
1da177e4 LT |
431 | /******************************************************************************* |
432 | * | |
433 | * FUNCTION: acpi_ev_detach_region | |
434 | * | |
435 | * PARAMETERS: region_obj - Region Object | |
436 | * acpi_ns_is_locked - Namespace Region Already Locked? | |
437 | * | |
438 | * RETURN: None | |
439 | * | |
440 | * DESCRIPTION: Break the association between the handler and the region | |
441 | * this is a two way association. | |
442 | * | |
443 | ******************************************************************************/ | |
444 | ||
445 | void | |
4be44fcd LB |
446 | acpi_ev_detach_region(union acpi_operand_object *region_obj, |
447 | u8 acpi_ns_is_locked) | |
1da177e4 | 448 | { |
4be44fcd LB |
449 | union acpi_operand_object *handler_obj; |
450 | union acpi_operand_object *obj_desc; | |
451 | union acpi_operand_object **last_obj_ptr; | |
452 | acpi_adr_space_setup region_setup; | |
453 | void **region_context; | |
454 | union acpi_operand_object *region_obj2; | |
455 | acpi_status status; | |
1da177e4 | 456 | |
4be44fcd | 457 | ACPI_FUNCTION_TRACE("ev_detach_region"); |
1da177e4 | 458 | |
4be44fcd | 459 | region_obj2 = acpi_ns_get_secondary_object(region_obj); |
1da177e4 LT |
460 | if (!region_obj2) { |
461 | return_VOID; | |
462 | } | |
463 | region_context = ®ion_obj2->extra.region_context; | |
464 | ||
465 | /* Get the address handler from the region object */ | |
466 | ||
467 | handler_obj = region_obj->region.handler; | |
468 | if (!handler_obj) { | |
52fc0b02 | 469 | |
1da177e4 LT |
470 | /* This region has no handler, all done */ |
471 | ||
472 | return_VOID; | |
473 | } | |
474 | ||
475 | /* Find this region in the handler's list */ | |
476 | ||
477 | obj_desc = handler_obj->address_space.region_list; | |
478 | last_obj_ptr = &handler_obj->address_space.region_list; | |
479 | ||
480 | while (obj_desc) { | |
52fc0b02 | 481 | |
1da177e4 LT |
482 | /* Is this the correct Region? */ |
483 | ||
484 | if (obj_desc == region_obj) { | |
4be44fcd LB |
485 | ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, |
486 | "Removing Region %p from address handler %p\n", | |
487 | region_obj, handler_obj)); | |
1da177e4 LT |
488 | |
489 | /* This is it, remove it from the handler's list */ | |
490 | ||
491 | *last_obj_ptr = obj_desc->region.next; | |
4be44fcd | 492 | obj_desc->region.next = NULL; /* Must clear field */ |
1da177e4 LT |
493 | |
494 | if (acpi_ns_is_locked) { | |
4be44fcd LB |
495 | status = |
496 | acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); | |
497 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
498 | return_VOID; |
499 | } | |
500 | } | |
501 | ||
502 | /* Now stop region accesses by executing the _REG method */ | |
503 | ||
4be44fcd LB |
504 | status = acpi_ev_execute_reg_method(region_obj, 0); |
505 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
506 | ACPI_EXCEPTION((AE_INFO, status, |
507 | "from region _REG, [%s]", | |
508 | acpi_ut_get_region_name | |
509 | (region_obj->region.space_id))); | |
1da177e4 LT |
510 | } |
511 | ||
512 | if (acpi_ns_is_locked) { | |
4be44fcd LB |
513 | status = |
514 | acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); | |
515 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
516 | return_VOID; |
517 | } | |
518 | } | |
519 | ||
520 | /* Call the setup handler with the deactivate notification */ | |
521 | ||
522 | region_setup = handler_obj->address_space.setup; | |
4be44fcd LB |
523 | status = |
524 | region_setup(region_obj, ACPI_REGION_DEACTIVATE, | |
525 | handler_obj->address_space.context, | |
526 | region_context); | |
1da177e4 LT |
527 | |
528 | /* Init routine may fail, Just ignore errors */ | |
529 | ||
4be44fcd | 530 | if (ACPI_FAILURE(status)) { |
b8e4d893 BM |
531 | ACPI_EXCEPTION((AE_INFO, status, |
532 | "from region init, [%s]", | |
533 | acpi_ut_get_region_name | |
534 | (region_obj->region.space_id))); | |
1da177e4 LT |
535 | } |
536 | ||
537 | region_obj->region.flags &= ~(AOPOBJ_SETUP_COMPLETE); | |
538 | ||
539 | /* | |
540 | * Remove handler reference in the region | |
541 | * | |
542 | * NOTE: this doesn't mean that the region goes away | |
543 | * The region is just inaccessible as indicated to | |
544 | * the _REG method | |
545 | * | |
546 | * If the region is on the handler's list | |
547 | * this better be the region's handler | |
548 | */ | |
549 | region_obj->region.handler = NULL; | |
4be44fcd | 550 | acpi_ut_remove_reference(handler_obj); |
1da177e4 LT |
551 | |
552 | return_VOID; | |
553 | } | |
554 | ||
555 | /* Walk the linked list of handlers */ | |
556 | ||
557 | last_obj_ptr = &obj_desc->region.next; | |
558 | obj_desc = obj_desc->region.next; | |
559 | } | |
560 | ||
561 | /* If we get here, the region was not in the handler's region list */ | |
562 | ||
4be44fcd LB |
563 | ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, |
564 | "Cannot remove region %p from address handler %p\n", | |
565 | region_obj, handler_obj)); | |
1da177e4 LT |
566 | |
567 | return_VOID; | |
568 | } | |
569 | ||
1da177e4 LT |
570 | /******************************************************************************* |
571 | * | |
572 | * FUNCTION: acpi_ev_attach_region | |
573 | * | |
574 | * PARAMETERS: handler_obj - Handler Object | |
575 | * region_obj - Region Object | |
576 | * acpi_ns_is_locked - Namespace Region Already Locked? | |
577 | * | |
578 | * RETURN: None | |
579 | * | |
580 | * DESCRIPTION: Create the association between the handler and the region | |
581 | * this is a two way association. | |
582 | * | |
583 | ******************************************************************************/ | |
584 | ||
585 | acpi_status | |
4be44fcd LB |
586 | acpi_ev_attach_region(union acpi_operand_object *handler_obj, |
587 | union acpi_operand_object *region_obj, | |
588 | u8 acpi_ns_is_locked) | |
1da177e4 LT |
589 | { |
590 | ||
4be44fcd | 591 | ACPI_FUNCTION_TRACE("ev_attach_region"); |
1da177e4 | 592 | |
4be44fcd LB |
593 | ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, |
594 | "Adding Region [%4.4s] %p to address handler %p [%s]\n", | |
595 | acpi_ut_get_node_name(region_obj->region.node), | |
596 | region_obj, handler_obj, | |
597 | acpi_ut_get_region_name(region_obj->region. | |
598 | space_id))); | |
1da177e4 LT |
599 | |
600 | /* Link this region to the front of the handler's list */ | |
601 | ||
602 | region_obj->region.next = handler_obj->address_space.region_list; | |
603 | handler_obj->address_space.region_list = region_obj; | |
604 | ||
605 | /* Install the region's handler */ | |
606 | ||
607 | if (region_obj->region.handler) { | |
4be44fcd | 608 | return_ACPI_STATUS(AE_ALREADY_EXISTS); |
1da177e4 LT |
609 | } |
610 | ||
611 | region_obj->region.handler = handler_obj; | |
4be44fcd | 612 | acpi_ut_add_reference(handler_obj); |
1da177e4 | 613 | |
4be44fcd | 614 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
615 | } |
616 | ||
1da177e4 LT |
617 | /******************************************************************************* |
618 | * | |
619 | * FUNCTION: acpi_ev_install_handler | |
620 | * | |
621 | * PARAMETERS: walk_namespace callback | |
622 | * | |
623 | * DESCRIPTION: This routine installs an address handler into objects that are | |
624 | * of type Region or Device. | |
625 | * | |
626 | * If the Object is a Device, and the device has a handler of | |
627 | * the same type then the search is terminated in that branch. | |
628 | * | |
629 | * This is because the existing handler is closer in proximity | |
630 | * to any more regions than the one we are trying to install. | |
631 | * | |
632 | ******************************************************************************/ | |
633 | ||
44f6c012 | 634 | static acpi_status |
4be44fcd LB |
635 | acpi_ev_install_handler(acpi_handle obj_handle, |
636 | u32 level, void *context, void **return_value) | |
1da177e4 | 637 | { |
4be44fcd LB |
638 | union acpi_operand_object *handler_obj; |
639 | union acpi_operand_object *next_handler_obj; | |
640 | union acpi_operand_object *obj_desc; | |
641 | struct acpi_namespace_node *node; | |
642 | acpi_status status; | |
1da177e4 | 643 | |
4be44fcd | 644 | ACPI_FUNCTION_NAME("ev_install_handler"); |
1da177e4 | 645 | |
4be44fcd | 646 | handler_obj = (union acpi_operand_object *)context; |
1da177e4 LT |
647 | |
648 | /* Parameter validation */ | |
649 | ||
650 | if (!handler_obj) { | |
651 | return (AE_OK); | |
652 | } | |
653 | ||
654 | /* Convert and validate the device handle */ | |
655 | ||
4be44fcd | 656 | node = acpi_ns_map_handle_to_node(obj_handle); |
1da177e4 LT |
657 | if (!node) { |
658 | return (AE_BAD_PARAMETER); | |
659 | } | |
660 | ||
661 | /* | |
662 | * We only care about regions.and objects | |
663 | * that are allowed to have address space handlers | |
664 | */ | |
665 | if ((node->type != ACPI_TYPE_DEVICE) && | |
4be44fcd | 666 | (node->type != ACPI_TYPE_REGION) && (node != acpi_gbl_root_node)) { |
1da177e4 LT |
667 | return (AE_OK); |
668 | } | |
669 | ||
670 | /* Check for an existing internal object */ | |
671 | ||
4be44fcd | 672 | obj_desc = acpi_ns_get_attached_object(node); |
1da177e4 | 673 | if (!obj_desc) { |
52fc0b02 | 674 | |
1da177e4 LT |
675 | /* No object, just exit */ |
676 | ||
677 | return (AE_OK); | |
678 | } | |
679 | ||
680 | /* Devices are handled different than regions */ | |
681 | ||
4be44fcd | 682 | if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_DEVICE) { |
52fc0b02 | 683 | |
1da177e4 LT |
684 | /* Check if this Device already has a handler for this address space */ |
685 | ||
686 | next_handler_obj = obj_desc->device.handler; | |
687 | while (next_handler_obj) { | |
52fc0b02 | 688 | |
1da177e4 LT |
689 | /* Found a handler, is it for the same address space? */ |
690 | ||
4be44fcd LB |
691 | if (next_handler_obj->address_space.space_id == |
692 | handler_obj->address_space.space_id) { | |
693 | ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, | |
694 | "Found handler for region [%s] in device %p(%p) handler %p\n", | |
695 | acpi_ut_get_region_name | |
696 | (handler_obj->address_space. | |
697 | space_id), obj_desc, | |
698 | next_handler_obj, | |
699 | handler_obj)); | |
1da177e4 LT |
700 | |
701 | /* | |
702 | * Since the object we found it on was a device, then it | |
703 | * means that someone has already installed a handler for | |
704 | * the branch of the namespace from this device on. Just | |
705 | * bail out telling the walk routine to not traverse this | |
706 | * branch. This preserves the scoping rule for handlers. | |
707 | */ | |
708 | return (AE_CTRL_DEPTH); | |
709 | } | |
710 | ||
711 | /* Walk the linked list of handlers attached to this device */ | |
712 | ||
713 | next_handler_obj = next_handler_obj->address_space.next; | |
714 | } | |
715 | ||
716 | /* | |
717 | * As long as the device didn't have a handler for this | |
718 | * space we don't care about it. We just ignore it and | |
719 | * proceed. | |
720 | */ | |
721 | return (AE_OK); | |
722 | } | |
723 | ||
724 | /* Object is a Region */ | |
725 | ||
726 | if (obj_desc->region.space_id != handler_obj->address_space.space_id) { | |
727 | /* | |
728 | * This region is for a different address space | |
729 | * -- just ignore it | |
730 | */ | |
731 | return (AE_OK); | |
732 | } | |
733 | ||
734 | /* | |
735 | * Now we have a region and it is for the handler's address | |
736 | * space type. | |
737 | * | |
738 | * First disconnect region for any previous handler (if any) | |
739 | */ | |
4be44fcd | 740 | acpi_ev_detach_region(obj_desc, FALSE); |
1da177e4 LT |
741 | |
742 | /* Connect the region to the new handler */ | |
743 | ||
4be44fcd | 744 | status = acpi_ev_attach_region(handler_obj, obj_desc, FALSE); |
1da177e4 LT |
745 | return (status); |
746 | } | |
747 | ||
1da177e4 LT |
748 | /******************************************************************************* |
749 | * | |
750 | * FUNCTION: acpi_ev_install_space_handler | |
751 | * | |
752 | * PARAMETERS: Node - Namespace node for the device | |
753 | * space_id - The address space ID | |
754 | * Handler - Address of the handler | |
755 | * Setup - Address of the setup function | |
756 | * Context - Value passed to the handler on each access | |
757 | * | |
758 | * RETURN: Status | |
759 | * | |
760 | * DESCRIPTION: Install a handler for all op_regions of a given space_id. | |
761 | * Assumes namespace is locked | |
762 | * | |
763 | ******************************************************************************/ | |
764 | ||
765 | acpi_status | |
4be44fcd LB |
766 | acpi_ev_install_space_handler(struct acpi_namespace_node * node, |
767 | acpi_adr_space_type space_id, | |
768 | acpi_adr_space_handler handler, | |
769 | acpi_adr_space_setup setup, void *context) | |
1da177e4 | 770 | { |
4be44fcd LB |
771 | union acpi_operand_object *obj_desc; |
772 | union acpi_operand_object *handler_obj; | |
773 | acpi_status status; | |
774 | acpi_object_type type; | |
775 | u16 flags = 0; | |
1da177e4 | 776 | |
4be44fcd | 777 | ACPI_FUNCTION_TRACE("ev_install_space_handler"); |
1da177e4 LT |
778 | |
779 | /* | |
780 | * This registration is valid for only the types below | |
781 | * and the root. This is where the default handlers | |
782 | * get placed. | |
783 | */ | |
4be44fcd LB |
784 | if ((node->type != ACPI_TYPE_DEVICE) && |
785 | (node->type != ACPI_TYPE_PROCESSOR) && | |
786 | (node->type != ACPI_TYPE_THERMAL) && (node != acpi_gbl_root_node)) { | |
1da177e4 LT |
787 | status = AE_BAD_PARAMETER; |
788 | goto unlock_and_exit; | |
789 | } | |
790 | ||
791 | if (handler == ACPI_DEFAULT_HANDLER) { | |
792 | flags = ACPI_ADDR_HANDLER_DEFAULT_INSTALLED; | |
793 | ||
794 | switch (space_id) { | |
795 | case ACPI_ADR_SPACE_SYSTEM_MEMORY: | |
796 | handler = acpi_ex_system_memory_space_handler; | |
4be44fcd | 797 | setup = acpi_ev_system_memory_region_setup; |
1da177e4 LT |
798 | break; |
799 | ||
800 | case ACPI_ADR_SPACE_SYSTEM_IO: | |
801 | handler = acpi_ex_system_io_space_handler; | |
4be44fcd | 802 | setup = acpi_ev_io_space_region_setup; |
1da177e4 LT |
803 | break; |
804 | ||
805 | case ACPI_ADR_SPACE_PCI_CONFIG: | |
806 | handler = acpi_ex_pci_config_space_handler; | |
4be44fcd | 807 | setup = acpi_ev_pci_config_region_setup; |
1da177e4 LT |
808 | break; |
809 | ||
810 | case ACPI_ADR_SPACE_CMOS: | |
811 | handler = acpi_ex_cmos_space_handler; | |
4be44fcd | 812 | setup = acpi_ev_cmos_region_setup; |
1da177e4 LT |
813 | break; |
814 | ||
815 | case ACPI_ADR_SPACE_PCI_BAR_TARGET: | |
816 | handler = acpi_ex_pci_bar_space_handler; | |
4be44fcd | 817 | setup = acpi_ev_pci_bar_region_setup; |
1da177e4 LT |
818 | break; |
819 | ||
820 | case ACPI_ADR_SPACE_DATA_TABLE: | |
821 | handler = acpi_ex_data_table_space_handler; | |
4be44fcd | 822 | setup = NULL; |
1da177e4 LT |
823 | break; |
824 | ||
825 | default: | |
826 | status = AE_BAD_PARAMETER; | |
827 | goto unlock_and_exit; | |
828 | } | |
829 | } | |
830 | ||
831 | /* If the caller hasn't specified a setup routine, use the default */ | |
832 | ||
833 | if (!setup) { | |
834 | setup = acpi_ev_default_region_setup; | |
835 | } | |
836 | ||
837 | /* Check for an existing internal object */ | |
838 | ||
4be44fcd | 839 | obj_desc = acpi_ns_get_attached_object(node); |
1da177e4 LT |
840 | if (obj_desc) { |
841 | /* | |
842 | * The attached device object already exists. | |
843 | * Make sure the handler is not already installed. | |
844 | */ | |
845 | handler_obj = obj_desc->device.handler; | |
846 | ||
847 | /* Walk the handler list for this device */ | |
848 | ||
849 | while (handler_obj) { | |
52fc0b02 | 850 | |
1da177e4 LT |
851 | /* Same space_id indicates a handler already installed */ |
852 | ||
853 | if (handler_obj->address_space.space_id == space_id) { | |
4be44fcd LB |
854 | if (handler_obj->address_space.handler == |
855 | handler) { | |
1da177e4 LT |
856 | /* |
857 | * It is (relatively) OK to attempt to install the SAME | |
44f6c012 RM |
858 | * handler twice. This can easily happen |
859 | * with PCI_Config space. | |
1da177e4 LT |
860 | */ |
861 | status = AE_SAME_HANDLER; | |
862 | goto unlock_and_exit; | |
4be44fcd | 863 | } else { |
1da177e4 LT |
864 | /* A handler is already installed */ |
865 | ||
866 | status = AE_ALREADY_EXISTS; | |
867 | } | |
868 | goto unlock_and_exit; | |
869 | } | |
870 | ||
871 | /* Walk the linked list of handlers */ | |
872 | ||
873 | handler_obj = handler_obj->address_space.next; | |
874 | } | |
4be44fcd LB |
875 | } else { |
876 | ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, | |
877 | "Creating object on Device %p while installing handler\n", | |
878 | node)); | |
1da177e4 LT |
879 | |
880 | /* obj_desc does not exist, create one */ | |
881 | ||
882 | if (node->type == ACPI_TYPE_ANY) { | |
883 | type = ACPI_TYPE_DEVICE; | |
4be44fcd | 884 | } else { |
1da177e4 LT |
885 | type = node->type; |
886 | } | |
887 | ||
4be44fcd | 888 | obj_desc = acpi_ut_create_internal_object(type); |
1da177e4 LT |
889 | if (!obj_desc) { |
890 | status = AE_NO_MEMORY; | |
891 | goto unlock_and_exit; | |
892 | } | |
893 | ||
894 | /* Init new descriptor */ | |
895 | ||
896 | obj_desc->common.type = (u8) type; | |
897 | ||
898 | /* Attach the new object to the Node */ | |
899 | ||
4be44fcd | 900 | status = acpi_ns_attach_object(node, obj_desc, type); |
1da177e4 LT |
901 | |
902 | /* Remove local reference to the object */ | |
903 | ||
4be44fcd | 904 | acpi_ut_remove_reference(obj_desc); |
1da177e4 | 905 | |
4be44fcd | 906 | if (ACPI_FAILURE(status)) { |
1da177e4 LT |
907 | goto unlock_and_exit; |
908 | } | |
909 | } | |
910 | ||
4be44fcd LB |
911 | ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, |
912 | "Installing address handler for region %s(%X) on Device %4.4s %p(%p)\n", | |
913 | acpi_ut_get_region_name(space_id), space_id, | |
914 | acpi_ut_get_node_name(node), node, obj_desc)); | |
1da177e4 LT |
915 | |
916 | /* | |
917 | * Install the handler | |
918 | * | |
919 | * At this point there is no existing handler. | |
920 | * Just allocate the object for the handler and link it | |
921 | * into the list. | |
922 | */ | |
4be44fcd LB |
923 | handler_obj = |
924 | acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_ADDRESS_HANDLER); | |
1da177e4 LT |
925 | if (!handler_obj) { |
926 | status = AE_NO_MEMORY; | |
927 | goto unlock_and_exit; | |
928 | } | |
929 | ||
930 | /* Init handler obj */ | |
931 | ||
4be44fcd LB |
932 | handler_obj->address_space.space_id = (u8) space_id; |
933 | handler_obj->address_space.hflags = flags; | |
1da177e4 | 934 | handler_obj->address_space.region_list = NULL; |
4be44fcd LB |
935 | handler_obj->address_space.node = node; |
936 | handler_obj->address_space.handler = handler; | |
937 | handler_obj->address_space.context = context; | |
938 | handler_obj->address_space.setup = setup; | |
1da177e4 LT |
939 | |
940 | /* Install at head of Device.address_space list */ | |
941 | ||
4be44fcd | 942 | handler_obj->address_space.next = obj_desc->device.handler; |
1da177e4 LT |
943 | |
944 | /* | |
945 | * The Device object is the first reference on the handler_obj. | |
946 | * Each region that uses the handler adds a reference. | |
947 | */ | |
948 | obj_desc->device.handler = handler_obj; | |
949 | ||
950 | /* | |
951 | * Walk the namespace finding all of the regions this | |
952 | * handler will manage. | |
953 | * | |
954 | * Start at the device and search the branch toward | |
955 | * the leaf nodes until either the leaf is encountered or | |
956 | * a device is detected that has an address handler of the | |
957 | * same type. | |
958 | * | |
959 | * In either case, back up and search down the remainder | |
960 | * of the branch | |
961 | */ | |
4be44fcd LB |
962 | status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, node, ACPI_UINT32_MAX, |
963 | ACPI_NS_WALK_UNLOCK, | |
964 | acpi_ev_install_handler, handler_obj, | |
965 | NULL); | |
1da177e4 | 966 | |
4be44fcd LB |
967 | unlock_and_exit: |
968 | return_ACPI_STATUS(status); | |
1da177e4 LT |
969 | } |
970 | ||
1da177e4 LT |
971 | /******************************************************************************* |
972 | * | |
973 | * FUNCTION: acpi_ev_execute_reg_methods | |
974 | * | |
975 | * PARAMETERS: Node - Namespace node for the device | |
976 | * space_id - The address space ID | |
977 | * | |
978 | * RETURN: Status | |
979 | * | |
980 | * DESCRIPTION: Run all _REG methods for the input Space ID; | |
981 | * Note: assumes namespace is locked, or system init time. | |
982 | * | |
983 | ******************************************************************************/ | |
984 | ||
985 | acpi_status | |
4be44fcd LB |
986 | acpi_ev_execute_reg_methods(struct acpi_namespace_node *node, |
987 | acpi_adr_space_type space_id) | |
1da177e4 | 988 | { |
4be44fcd | 989 | acpi_status status; |
1da177e4 | 990 | |
4be44fcd | 991 | ACPI_FUNCTION_TRACE("ev_execute_reg_methods"); |
1da177e4 LT |
992 | |
993 | /* | |
994 | * Run all _REG methods for all Operation Regions for this | |
995 | * space ID. This is a separate walk in order to handle any | |
996 | * interdependencies between regions and _REG methods. (i.e. handlers | |
997 | * must be installed for all regions of this Space ID before we | |
998 | * can run any _REG methods) | |
999 | */ | |
4be44fcd LB |
1000 | status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, node, ACPI_UINT32_MAX, |
1001 | ACPI_NS_WALK_UNLOCK, acpi_ev_reg_run, | |
1002 | &space_id, NULL); | |
1da177e4 | 1003 | |
4be44fcd | 1004 | return_ACPI_STATUS(status); |
1da177e4 LT |
1005 | } |
1006 | ||
1da177e4 LT |
1007 | /******************************************************************************* |
1008 | * | |
1009 | * FUNCTION: acpi_ev_reg_run | |
1010 | * | |
1011 | * PARAMETERS: walk_namespace callback | |
1012 | * | |
1013 | * DESCRIPTION: Run _REg method for region objects of the requested space_iD | |
1014 | * | |
1015 | ******************************************************************************/ | |
1016 | ||
44f6c012 | 1017 | static acpi_status |
4be44fcd LB |
1018 | acpi_ev_reg_run(acpi_handle obj_handle, |
1019 | u32 level, void *context, void **return_value) | |
1da177e4 | 1020 | { |
4be44fcd LB |
1021 | union acpi_operand_object *obj_desc; |
1022 | struct acpi_namespace_node *node; | |
1023 | acpi_adr_space_type space_id; | |
1024 | acpi_status status; | |
1da177e4 | 1025 | |
4be44fcd | 1026 | space_id = *ACPI_CAST_PTR(acpi_adr_space_type, context); |
1da177e4 LT |
1027 | |
1028 | /* Convert and validate the device handle */ | |
1029 | ||
4be44fcd | 1030 | node = acpi_ns_map_handle_to_node(obj_handle); |
1da177e4 LT |
1031 | if (!node) { |
1032 | return (AE_BAD_PARAMETER); | |
1033 | } | |
1034 | ||
1035 | /* | |
1036 | * We only care about regions.and objects | |
1037 | * that are allowed to have address space handlers | |
1038 | */ | |
4be44fcd | 1039 | if ((node->type != ACPI_TYPE_REGION) && (node != acpi_gbl_root_node)) { |
1da177e4 LT |
1040 | return (AE_OK); |
1041 | } | |
1042 | ||
1043 | /* Check for an existing internal object */ | |
1044 | ||
4be44fcd | 1045 | obj_desc = acpi_ns_get_attached_object(node); |
1da177e4 | 1046 | if (!obj_desc) { |
52fc0b02 | 1047 | |
1da177e4 LT |
1048 | /* No object, just exit */ |
1049 | ||
1050 | return (AE_OK); | |
1051 | } | |
1052 | ||
1053 | /* Object is a Region */ | |
1054 | ||
1055 | if (obj_desc->region.space_id != space_id) { | |
1056 | /* | |
1057 | * This region is for a different address space | |
1058 | * -- just ignore it | |
1059 | */ | |
1060 | return (AE_OK); | |
1061 | } | |
1062 | ||
4be44fcd | 1063 | status = acpi_ev_execute_reg_method(obj_desc, 1); |
1da177e4 LT |
1064 | return (status); |
1065 | } |