Commit | Line | Data |
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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: psxface - Parser external interfaces | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
75a44ce0 | 8 | * Copyright (C) 2000 - 2008, Intel Corp. |
1da177e4 LT |
9 | * All rights reserved. |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or without | |
12 | * modification, are permitted provided that the following conditions | |
13 | * are met: | |
14 | * 1. Redistributions of source code must retain the above copyright | |
15 | * notice, this list of conditions, and the following disclaimer, | |
16 | * without modification. | |
17 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer | |
18 | * substantially similar to the "NO WARRANTY" disclaimer below | |
19 | * ("Disclaimer") and any redistribution must be conditioned upon | |
20 | * including a substantially similar Disclaimer requirement for further | |
21 | * binary redistribution. | |
22 | * 3. Neither the names of the above-listed copyright holders nor the names | |
23 | * of any contributors may be used to endorse or promote products derived | |
24 | * from this software without specific prior written permission. | |
25 | * | |
26 | * Alternatively, this software may be distributed under the terms of the | |
27 | * GNU General Public License ("GPL") version 2 as published by the Free | |
28 | * Software Foundation. | |
29 | * | |
30 | * NO WARRANTY | |
31 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
32 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
33 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR | |
34 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
35 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
36 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
37 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
38 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
39 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
40 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
41 | * POSSIBILITY OF SUCH DAMAGES. | |
42 | */ | |
43 | ||
1da177e4 LT |
44 | #include <acpi/acpi.h> |
45 | #include <acpi/acparser.h> | |
46 | #include <acpi/acdispat.h> | |
47 | #include <acpi/acinterp.h> | |
1da177e4 | 48 | |
1da177e4 | 49 | #define _COMPONENT ACPI_PARSER |
4be44fcd | 50 | ACPI_MODULE_NAME("psxface") |
1da177e4 | 51 | |
0c9938cc | 52 | /* Local Prototypes */ |
4119532c | 53 | static void acpi_ps_start_trace(struct acpi_evaluate_info *info); |
50eca3eb | 54 | |
4119532c | 55 | static void acpi_ps_stop_trace(struct acpi_evaluate_info *info); |
50eca3eb | 56 | |
0c9938cc | 57 | static void |
4119532c | 58 | acpi_ps_update_parameter_list(struct acpi_evaluate_info *info, u16 action); |
1da177e4 | 59 | |
50eca3eb BM |
60 | /******************************************************************************* |
61 | * | |
62 | * FUNCTION: acpi_debug_trace | |
63 | * | |
64 | * PARAMETERS: method_name - Valid ACPI name string | |
65 | * debug_level - Optional level mask. 0 to use default | |
66 | * debug_layer - Optional layer mask. 0 to use default | |
67 | * Flags - bit 1: one shot(1) or persistent(0) | |
68 | * | |
69 | * RETURN: Status | |
70 | * | |
71 | * DESCRIPTION: External interface to enable debug tracing during control | |
72 | * method execution | |
73 | * | |
74 | ******************************************************************************/ | |
75 | ||
76 | acpi_status | |
77 | acpi_debug_trace(char *name, u32 debug_level, u32 debug_layer, u32 flags) | |
78 | { | |
79 | acpi_status status; | |
80 | ||
81 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); | |
82 | if (ACPI_FAILURE(status)) { | |
83 | return (status); | |
84 | } | |
85 | ||
86 | /* TBDs: Validate name, allow full path or just nameseg */ | |
87 | ||
c51a4de8 | 88 | acpi_gbl_trace_method_name = *ACPI_CAST_PTR(u32, name); |
50eca3eb BM |
89 | acpi_gbl_trace_flags = flags; |
90 | ||
91 | if (debug_level) { | |
92 | acpi_gbl_trace_dbg_level = debug_level; | |
93 | } | |
94 | if (debug_layer) { | |
95 | acpi_gbl_trace_dbg_layer = debug_layer; | |
96 | } | |
97 | ||
98 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); | |
99 | return (AE_OK); | |
100 | } | |
101 | ||
102 | /******************************************************************************* | |
103 | * | |
104 | * FUNCTION: acpi_ps_start_trace | |
105 | * | |
106 | * PARAMETERS: Info - Method info struct | |
107 | * | |
108 | * RETURN: None | |
109 | * | |
110 | * DESCRIPTION: Start control method execution trace | |
111 | * | |
112 | ******************************************************************************/ | |
113 | ||
4119532c | 114 | static void acpi_ps_start_trace(struct acpi_evaluate_info *info) |
50eca3eb BM |
115 | { |
116 | acpi_status status; | |
117 | ||
118 | ACPI_FUNCTION_ENTRY(); | |
119 | ||
120 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); | |
121 | if (ACPI_FAILURE(status)) { | |
122 | return; | |
123 | } | |
124 | ||
125 | if ((!acpi_gbl_trace_method_name) || | |
4119532c | 126 | (acpi_gbl_trace_method_name != info->resolved_node->name.integer)) { |
50eca3eb BM |
127 | goto exit; |
128 | } | |
129 | ||
130 | acpi_gbl_original_dbg_level = acpi_dbg_level; | |
131 | acpi_gbl_original_dbg_layer = acpi_dbg_layer; | |
132 | ||
133 | acpi_dbg_level = 0x00FFFFFF; | |
134 | acpi_dbg_layer = ACPI_UINT32_MAX; | |
135 | ||
136 | if (acpi_gbl_trace_dbg_level) { | |
137 | acpi_dbg_level = acpi_gbl_trace_dbg_level; | |
138 | } | |
139 | if (acpi_gbl_trace_dbg_layer) { | |
140 | acpi_dbg_layer = acpi_gbl_trace_dbg_layer; | |
141 | } | |
142 | ||
143 | exit: | |
144 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); | |
145 | } | |
146 | ||
147 | /******************************************************************************* | |
148 | * | |
149 | * FUNCTION: acpi_ps_stop_trace | |
150 | * | |
151 | * PARAMETERS: Info - Method info struct | |
152 | * | |
153 | * RETURN: None | |
154 | * | |
155 | * DESCRIPTION: Stop control method execution trace | |
156 | * | |
157 | ******************************************************************************/ | |
158 | ||
4119532c | 159 | static void acpi_ps_stop_trace(struct acpi_evaluate_info *info) |
50eca3eb BM |
160 | { |
161 | acpi_status status; | |
162 | ||
163 | ACPI_FUNCTION_ENTRY(); | |
164 | ||
165 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); | |
166 | if (ACPI_FAILURE(status)) { | |
167 | return; | |
168 | } | |
169 | ||
170 | if ((!acpi_gbl_trace_method_name) || | |
4119532c | 171 | (acpi_gbl_trace_method_name != info->resolved_node->name.integer)) { |
50eca3eb BM |
172 | goto exit; |
173 | } | |
174 | ||
175 | /* Disable further tracing if type is one-shot */ | |
176 | ||
177 | if (acpi_gbl_trace_flags & 1) { | |
178 | acpi_gbl_trace_method_name = 0; | |
179 | acpi_gbl_trace_dbg_level = 0; | |
180 | acpi_gbl_trace_dbg_layer = 0; | |
181 | } | |
182 | ||
183 | acpi_dbg_level = acpi_gbl_original_dbg_level; | |
184 | acpi_dbg_layer = acpi_gbl_original_dbg_layer; | |
185 | ||
186 | exit: | |
187 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); | |
188 | } | |
189 | ||
1da177e4 LT |
190 | /******************************************************************************* |
191 | * | |
0c9938cc | 192 | * FUNCTION: acpi_ps_execute_method |
1da177e4 | 193 | * |
44f6c012 RM |
194 | * PARAMETERS: Info - Method info block, contains: |
195 | * Node - Method Node to execute | |
0c9938cc | 196 | * obj_desc - Method object |
44f6c012 | 197 | * Parameters - List of parameters to pass to the method, |
1da177e4 LT |
198 | * terminated by NULL. Params itself may be |
199 | * NULL if no parameters are being passed. | |
44f6c012 RM |
200 | * return_object - Where to put method's return value (if |
201 | * any). If NULL, no value is returned. | |
202 | * parameter_type - Type of Parameter list | |
203 | * return_object - Where to put method's return value (if | |
204 | * any). If NULL, no value is returned. | |
0c9938cc | 205 | * pass_number - Parse or execute pass |
1da177e4 LT |
206 | * |
207 | * RETURN: Status | |
208 | * | |
209 | * DESCRIPTION: Execute a control method | |
210 | * | |
211 | ******************************************************************************/ | |
212 | ||
4119532c | 213 | acpi_status acpi_ps_execute_method(struct acpi_evaluate_info *info) |
1da177e4 | 214 | { |
4be44fcd | 215 | acpi_status status; |
9bc75cff VP |
216 | union acpi_parse_object *op; |
217 | struct acpi_walk_state *walk_state; | |
1da177e4 | 218 | |
b229cf92 | 219 | ACPI_FUNCTION_TRACE(ps_execute_method); |
1da177e4 | 220 | |
0c9938cc | 221 | /* Validate the Info and method Node */ |
1da177e4 | 222 | |
4119532c | 223 | if (!info || !info->resolved_node) { |
4be44fcd | 224 | return_ACPI_STATUS(AE_NULL_ENTRY); |
1da177e4 LT |
225 | } |
226 | ||
1da177e4 LT |
227 | /* Init for new method, wait on concurrency semaphore */ |
228 | ||
4be44fcd | 229 | status = |
4119532c BM |
230 | acpi_ds_begin_method_execution(info->resolved_node, info->obj_desc, |
231 | NULL); | |
4be44fcd LB |
232 | if (ACPI_FAILURE(status)) { |
233 | return_ACPI_STATUS(status); | |
1da177e4 LT |
234 | } |
235 | ||
0c9938cc | 236 | /* |
9bc75cff | 237 | * The caller "owns" the parameters, so give each one an extra reference |
0c9938cc | 238 | */ |
4be44fcd | 239 | acpi_ps_update_parameter_list(info, REF_INCREMENT); |
1da177e4 | 240 | |
50eca3eb BM |
241 | /* Begin tracing if requested */ |
242 | ||
243 | acpi_ps_start_trace(info); | |
244 | ||
0c9938cc | 245 | /* |
9bc75cff | 246 | * Execute the method. Performs parse simultaneously |
0c9938cc | 247 | */ |
4be44fcd | 248 | ACPI_DEBUG_PRINT((ACPI_DB_PARSE, |
9bc75cff VP |
249 | "**** Begin Method Parse/Execute [%4.4s] **** Node=%p Obj=%p\n", |
250 | info->resolved_node->name.ascii, info->resolved_node, | |
251 | info->obj_desc)); | |
1da177e4 | 252 | |
9bc75cff VP |
253 | /* Create and init a Root Node */ |
254 | ||
255 | op = acpi_ps_create_scope_op(); | |
256 | if (!op) { | |
257 | status = AE_NO_MEMORY; | |
0c9938cc | 258 | goto cleanup; |
1da177e4 LT |
259 | } |
260 | ||
9bc75cff | 261 | /* Create and initialize a new walk state */ |
1da177e4 | 262 | |
ec3153fb | 263 | info->pass_number = ACPI_IMODE_EXECUTE; |
9bc75cff VP |
264 | walk_state = |
265 | acpi_ds_create_walk_state(info->obj_desc->method.owner_id, NULL, | |
266 | NULL, NULL); | |
267 | if (!walk_state) { | |
268 | status = AE_NO_MEMORY; | |
269 | goto cleanup; | |
270 | } | |
271 | ||
272 | status = acpi_ds_init_aml_walk(walk_state, op, info->resolved_node, | |
273 | info->obj_desc->method.aml_start, | |
274 | info->obj_desc->method.aml_length, info, | |
275 | info->pass_number); | |
276 | if (ACPI_FAILURE(status)) { | |
277 | acpi_ds_delete_walk_state(walk_state); | |
278 | goto cleanup; | |
279 | } | |
280 | ||
281 | /* Parse the AML */ | |
282 | ||
283 | status = acpi_ps_parse_aml(walk_state); | |
284 | ||
285 | /* walk_state was deleted by parse_aml */ | |
0c9938cc | 286 | |
4be44fcd | 287 | cleanup: |
9bc75cff VP |
288 | acpi_ps_delete_parse_tree(op); |
289 | ||
50eca3eb BM |
290 | /* End optional tracing */ |
291 | ||
292 | acpi_ps_stop_trace(info); | |
293 | ||
0c9938cc | 294 | /* Take away the extra reference that we gave the parameters above */ |
1da177e4 | 295 | |
4be44fcd | 296 | acpi_ps_update_parameter_list(info, REF_DECREMENT); |
1da177e4 | 297 | |
0c9938cc | 298 | /* Exit now if error above */ |
1da177e4 | 299 | |
4be44fcd LB |
300 | if (ACPI_FAILURE(status)) { |
301 | return_ACPI_STATUS(status); | |
1da177e4 LT |
302 | } |
303 | ||
0c9938cc RM |
304 | /* |
305 | * If the method has returned an object, signal this to the caller with | |
306 | * a control exception code | |
307 | */ | |
308 | if (info->return_object) { | |
b229cf92 | 309 | ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "Method returned ObjDesc=%p\n", |
4be44fcd LB |
310 | info->return_object)); |
311 | ACPI_DUMP_STACK_ENTRY(info->return_object); | |
0c9938cc RM |
312 | |
313 | status = AE_CTRL_RETURN_VALUE; | |
1da177e4 LT |
314 | } |
315 | ||
4be44fcd | 316 | return_ACPI_STATUS(status); |
0c9938cc | 317 | } |
44f6c012 | 318 | |
0c9938cc RM |
319 | /******************************************************************************* |
320 | * | |
321 | * FUNCTION: acpi_ps_update_parameter_list | |
322 | * | |
4119532c | 323 | * PARAMETERS: Info - See struct acpi_evaluate_info |
0c9938cc RM |
324 | * (Used: parameter_type and Parameters) |
325 | * Action - Add or Remove reference | |
326 | * | |
327 | * RETURN: Status | |
328 | * | |
329 | * DESCRIPTION: Update reference count on all method parameter objects | |
330 | * | |
331 | ******************************************************************************/ | |
1da177e4 | 332 | |
0c9938cc | 333 | static void |
4119532c | 334 | acpi_ps_update_parameter_list(struct acpi_evaluate_info *info, u16 action) |
0c9938cc | 335 | { |
4be44fcd | 336 | acpi_native_uint i; |
1da177e4 | 337 | |
4be44fcd | 338 | if ((info->parameter_type == ACPI_PARAM_ARGS) && (info->parameters)) { |
52fc0b02 | 339 | |
0c9938cc | 340 | /* Update reference count for each parameter */ |
1da177e4 LT |
341 | |
342 | for (i = 0; info->parameters[i]; i++) { | |
52fc0b02 | 343 | |
1da177e4 LT |
344 | /* Ignore errors, just do them all */ |
345 | ||
4be44fcd LB |
346 | (void)acpi_ut_update_object_reference(info-> |
347 | parameters[i], | |
348 | action); | |
1da177e4 LT |
349 | } |
350 | } | |
0c9938cc | 351 | } |