1 /******************************************************************************
2 *
3 * Module Name: psxface - Parser external interfaces
4 *
5 *****************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2011, 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 "acparser.h"
47 #include "acdispat.h"
48 #include "acinterp.h"
49 #include "actables.h"
50
51 #define _COMPONENT ACPI_PARSER
52 ACPI_MODULE_NAME("psxface")
53
54 /* Local Prototypes */
55 static void acpi_ps_start_trace(struct acpi_evaluate_info *info);
56
57 static void acpi_ps_stop_trace(struct acpi_evaluate_info *info);
58
59 static void
60 acpi_ps_update_parameter_list(struct acpi_evaluate_info *info, u16 action);
61
62 /*******************************************************************************
63 *
64 * FUNCTION: acpi_debug_trace
65 *
66 * PARAMETERS: method_name - Valid ACPI name string
67 * debug_level - Optional level mask. 0 to use default
68 * debug_layer - Optional layer mask. 0 to use default
69 * Flags - bit 1: one shot(1) or persistent(0)
70 *
71 * RETURN: Status
72 *
73 * DESCRIPTION: External interface to enable debug tracing during control
74 * method execution
75 *
76 ******************************************************************************/
77
78 acpi_status
acpi_debug_trace(char * name,u32 debug_level,u32 debug_layer,u32 flags)79 acpi_debug_trace(char *name, u32 debug_level, u32 debug_layer, u32 flags)
80 {
81 acpi_status status;
82
83 status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
84 if (ACPI_FAILURE(status)) {
85 return (status);
86 }
87
88 /* TBDs: Validate name, allow full path or just nameseg */
89
90 acpi_gbl_trace_method_name = *ACPI_CAST_PTR(u32, name);
91 acpi_gbl_trace_flags = flags;
92
93 if (debug_level) {
94 acpi_gbl_trace_dbg_level = debug_level;
95 }
96 if (debug_layer) {
97 acpi_gbl_trace_dbg_layer = debug_layer;
98 }
99
100 (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
101 return (AE_OK);
102 }
103
104 /*******************************************************************************
105 *
106 * FUNCTION: acpi_ps_start_trace
107 *
108 * PARAMETERS: Info - Method info struct
109 *
110 * RETURN: None
111 *
112 * DESCRIPTION: Start control method execution trace
113 *
114 ******************************************************************************/
115
acpi_ps_start_trace(struct acpi_evaluate_info * info)116 static void acpi_ps_start_trace(struct acpi_evaluate_info *info)
117 {
118 acpi_status status;
119
120 ACPI_FUNCTION_ENTRY();
121
122 status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
123 if (ACPI_FAILURE(status)) {
124 return;
125 }
126
127 if ((!acpi_gbl_trace_method_name) ||
128 (acpi_gbl_trace_method_name != info->resolved_node->name.integer)) {
129 goto exit;
130 }
131
132 acpi_gbl_original_dbg_level = acpi_dbg_level;
133 acpi_gbl_original_dbg_layer = acpi_dbg_layer;
134
135 acpi_dbg_level = 0x00FFFFFF;
136 acpi_dbg_layer = ACPI_UINT32_MAX;
137
138 if (acpi_gbl_trace_dbg_level) {
139 acpi_dbg_level = acpi_gbl_trace_dbg_level;
140 }
141 if (acpi_gbl_trace_dbg_layer) {
142 acpi_dbg_layer = acpi_gbl_trace_dbg_layer;
143 }
144
145 exit:
146 (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
147 }
148
149 /*******************************************************************************
150 *
151 * FUNCTION: acpi_ps_stop_trace
152 *
153 * PARAMETERS: Info - Method info struct
154 *
155 * RETURN: None
156 *
157 * DESCRIPTION: Stop control method execution trace
158 *
159 ******************************************************************************/
160
acpi_ps_stop_trace(struct acpi_evaluate_info * info)161 static void acpi_ps_stop_trace(struct acpi_evaluate_info *info)
162 {
163 acpi_status status;
164
165 ACPI_FUNCTION_ENTRY();
166
167 status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
168 if (ACPI_FAILURE(status)) {
169 return;
170 }
171
172 if ((!acpi_gbl_trace_method_name) ||
173 (acpi_gbl_trace_method_name != info->resolved_node->name.integer)) {
174 goto exit;
175 }
176
177 /* Disable further tracing if type is one-shot */
178
179 if (acpi_gbl_trace_flags & 1) {
180 acpi_gbl_trace_method_name = 0;
181 acpi_gbl_trace_dbg_level = 0;
182 acpi_gbl_trace_dbg_layer = 0;
183 }
184
185 acpi_dbg_level = acpi_gbl_original_dbg_level;
186 acpi_dbg_layer = acpi_gbl_original_dbg_layer;
187
188 exit:
189 (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
190 }
191
192 /*******************************************************************************
193 *
194 * FUNCTION: acpi_ps_execute_method
195 *
196 * PARAMETERS: Info - Method info block, contains:
197 * Node - Method Node to execute
198 * obj_desc - Method object
199 * Parameters - List of parameters to pass to the method,
200 * terminated by NULL. Params itself may be
201 * NULL if no parameters are being passed.
202 * return_object - Where to put method's return value (if
203 * any). If NULL, no value is returned.
204 * parameter_type - Type of Parameter list
205 * return_object - Where to put method's return value (if
206 * any). If NULL, no value is returned.
207 * pass_number - Parse or execute pass
208 *
209 * RETURN: Status
210 *
211 * DESCRIPTION: Execute a control method
212 *
213 ******************************************************************************/
214
acpi_ps_execute_method(struct acpi_evaluate_info * info)215 acpi_status acpi_ps_execute_method(struct acpi_evaluate_info *info)
216 {
217 acpi_status status;
218 union acpi_parse_object *op;
219 struct acpi_walk_state *walk_state;
220
221 ACPI_FUNCTION_TRACE(ps_execute_method);
222
223 /* Quick validation of DSDT header */
224
225 acpi_tb_check_dsdt_header();
226
227 /* Validate the Info and method Node */
228
229 if (!info || !info->resolved_node) {
230 return_ACPI_STATUS(AE_NULL_ENTRY);
231 }
232
233 /* Init for new method, wait on concurrency semaphore */
234
235 status =
236 acpi_ds_begin_method_execution(info->resolved_node, info->obj_desc,
237 NULL);
238 if (ACPI_FAILURE(status)) {
239 return_ACPI_STATUS(status);
240 }
241
242 /*
243 * The caller "owns" the parameters, so give each one an extra reference
244 */
245 acpi_ps_update_parameter_list(info, REF_INCREMENT);
246
247 /* Begin tracing if requested */
248
249 acpi_ps_start_trace(info);
250
251 /*
252 * Execute the method. Performs parse simultaneously
253 */
254 ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
255 "**** Begin Method Parse/Execute [%4.4s] **** Node=%p Obj=%p\n",
256 info->resolved_node->name.ascii, info->resolved_node,
257 info->obj_desc));
258
259 /* Create and init a Root Node */
260
261 op = acpi_ps_create_scope_op();
262 if (!op) {
263 status = AE_NO_MEMORY;
264 goto cleanup;
265 }
266
267 /* Create and initialize a new walk state */
268
269 info->pass_number = ACPI_IMODE_EXECUTE;
270 walk_state =
271 acpi_ds_create_walk_state(info->obj_desc->method.owner_id, NULL,
272 NULL, NULL);
273 if (!walk_state) {
274 status = AE_NO_MEMORY;
275 goto cleanup;
276 }
277
278 status = acpi_ds_init_aml_walk(walk_state, op, info->resolved_node,
279 info->obj_desc->method.aml_start,
280 info->obj_desc->method.aml_length, info,
281 info->pass_number);
282 if (ACPI_FAILURE(status)) {
283 acpi_ds_delete_walk_state(walk_state);
284 goto cleanup;
285 }
286
287 if (info->obj_desc->method.info_flags & ACPI_METHOD_MODULE_LEVEL) {
288 walk_state->parse_flags |= ACPI_PARSE_MODULE_LEVEL;
289 }
290
291 /* Invoke an internal method if necessary */
292
293 if (info->obj_desc->method.info_flags & ACPI_METHOD_INTERNAL_ONLY) {
294 status =
295 info->obj_desc->method.dispatch.implementation(walk_state);
296 info->return_object = walk_state->return_desc;
297
298 /* Cleanup states */
299
300 acpi_ds_scope_stack_clear(walk_state);
301 acpi_ps_cleanup_scope(&walk_state->parser_state);
302 acpi_ds_terminate_control_method(walk_state->method_desc,
303 walk_state);
304 acpi_ds_delete_walk_state(walk_state);
305 goto cleanup;
306 }
307
308 /*
309 * Start method evaluation with an implicit return of zero.
310 * This is done for Windows compatibility.
311 */
312 if (acpi_gbl_enable_interpreter_slack) {
313 walk_state->implicit_return_obj =
314 acpi_ut_create_integer_object((u64) 0);
315 if (!walk_state->implicit_return_obj) {
316 status = AE_NO_MEMORY;
317 acpi_ds_delete_walk_state(walk_state);
318 goto cleanup;
319 }
320 }
321
322 /* Parse the AML */
323
324 status = acpi_ps_parse_aml(walk_state);
325
326 /* walk_state was deleted by parse_aml */
327
328 cleanup:
329 acpi_ps_delete_parse_tree(op);
330
331 /* End optional tracing */
332
333 acpi_ps_stop_trace(info);
334
335 /* Take away the extra reference that we gave the parameters above */
336
337 acpi_ps_update_parameter_list(info, REF_DECREMENT);
338
339 /* Exit now if error above */
340
341 if (ACPI_FAILURE(status)) {
342 return_ACPI_STATUS(status);
343 }
344
345 /*
346 * If the method has returned an object, signal this to the caller with
347 * a control exception code
348 */
349 if (info->return_object) {
350 ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "Method returned ObjDesc=%p\n",
351 info->return_object));
352 ACPI_DUMP_STACK_ENTRY(info->return_object);
353
354 status = AE_CTRL_RETURN_VALUE;
355 }
356
357 return_ACPI_STATUS(status);
358 }
359
360 /*******************************************************************************
361 *
362 * FUNCTION: acpi_ps_update_parameter_list
363 *
364 * PARAMETERS: Info - See struct acpi_evaluate_info
365 * (Used: parameter_type and Parameters)
366 * Action - Add or Remove reference
367 *
368 * RETURN: Status
369 *
370 * DESCRIPTION: Update reference count on all method parameter objects
371 *
372 ******************************************************************************/
373
374 static void
acpi_ps_update_parameter_list(struct acpi_evaluate_info * info,u16 action)375 acpi_ps_update_parameter_list(struct acpi_evaluate_info *info, u16 action)
376 {
377 u32 i;
378
379 if (info->parameters) {
380
381 /* Update reference count for each parameter */
382
383 for (i = 0; info->parameters[i]; i++) {
384
385 /* Ignore errors, just do them all */
386
387 (void)acpi_ut_update_object_reference(info->
388 parameters[i],
389 action);
390 }
391 }
392 }
393