Go to most recent revision | Details | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
6595 | serge | 1 | /****************************************************************************** |
2 | * |
||
3 | * Module Name: uteval - Object evaluation |
||
4 | * |
||
5 | *****************************************************************************/ |
||
6 | |||
7 | /* |
||
8 | * Copyright (C) 2000 - 2015, 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 |
||
45 | #include "accommon.h" |
||
46 | #include "acnamesp.h" |
||
47 | |||
48 | #define _COMPONENT ACPI_UTILITIES |
||
49 | ACPI_MODULE_NAME("uteval") |
||
50 | |||
51 | /******************************************************************************* |
||
52 | * |
||
53 | * FUNCTION: acpi_ut_evaluate_object |
||
54 | * |
||
55 | * PARAMETERS: prefix_node - Starting node |
||
56 | * path - Path to object from starting node |
||
57 | * expected_return_types - Bitmap of allowed return types |
||
58 | * return_desc - Where a return value is stored |
||
59 | * |
||
60 | * RETURN: Status |
||
61 | * |
||
62 | * DESCRIPTION: Evaluates a namespace object and verifies the type of the |
||
63 | * return object. Common code that simplifies accessing objects |
||
64 | * that have required return objects of fixed types. |
||
65 | * |
||
66 | * NOTE: Internal function, no parameter validation |
||
67 | * |
||
68 | ******************************************************************************/ |
||
69 | |||
70 | acpi_status |
||
71 | acpi_ut_evaluate_object(struct acpi_namespace_node *prefix_node, |
||
72 | char *path, |
||
73 | u32 expected_return_btypes, |
||
74 | union acpi_operand_object **return_desc) |
||
75 | { |
||
76 | struct acpi_evaluate_info *info; |
||
77 | acpi_status status; |
||
78 | u32 return_btype; |
||
79 | |||
80 | ACPI_FUNCTION_TRACE(ut_evaluate_object); |
||
81 | |||
82 | /* Allocate the evaluation information block */ |
||
83 | |||
84 | info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info)); |
||
85 | if (!info) { |
||
86 | return_ACPI_STATUS(AE_NO_MEMORY); |
||
87 | } |
||
88 | |||
89 | info->prefix_node = prefix_node; |
||
90 | info->relative_pathname = path; |
||
91 | |||
92 | /* Evaluate the object/method */ |
||
93 | |||
94 | status = acpi_ns_evaluate(info); |
||
95 | if (ACPI_FAILURE(status)) { |
||
96 | if (status == AE_NOT_FOUND) { |
||
97 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
||
98 | "[%4.4s.%s] was not found\n", |
||
99 | acpi_ut_get_node_name(prefix_node), |
||
100 | path)); |
||
101 | } else { |
||
102 | ACPI_ERROR_METHOD("Method execution failed", |
||
103 | prefix_node, path, status); |
||
104 | } |
||
105 | |||
106 | goto cleanup; |
||
107 | } |
||
108 | |||
109 | /* Did we get a return object? */ |
||
110 | |||
111 | if (!info->return_object) { |
||
112 | if (expected_return_btypes) { |
||
113 | ACPI_ERROR_METHOD("No object was returned from", |
||
114 | prefix_node, path, AE_NOT_EXIST); |
||
115 | |||
116 | status = AE_NOT_EXIST; |
||
117 | } |
||
118 | |||
119 | goto cleanup; |
||
120 | } |
||
121 | |||
122 | /* Map the return object type to the bitmapped type */ |
||
123 | |||
124 | switch ((info->return_object)->common.type) { |
||
125 | case ACPI_TYPE_INTEGER: |
||
126 | |||
127 | return_btype = ACPI_BTYPE_INTEGER; |
||
128 | break; |
||
129 | |||
130 | case ACPI_TYPE_BUFFER: |
||
131 | |||
132 | return_btype = ACPI_BTYPE_BUFFER; |
||
133 | break; |
||
134 | |||
135 | case ACPI_TYPE_STRING: |
||
136 | |||
137 | return_btype = ACPI_BTYPE_STRING; |
||
138 | break; |
||
139 | |||
140 | case ACPI_TYPE_PACKAGE: |
||
141 | |||
142 | return_btype = ACPI_BTYPE_PACKAGE; |
||
143 | break; |
||
144 | |||
145 | default: |
||
146 | |||
147 | return_btype = 0; |
||
148 | break; |
||
149 | } |
||
150 | |||
151 | if ((acpi_gbl_enable_interpreter_slack) && (!expected_return_btypes)) { |
||
152 | /* |
||
153 | * We received a return object, but one was not expected. This can |
||
154 | * happen frequently if the "implicit return" feature is enabled. |
||
155 | * Just delete the return object and return AE_OK. |
||
156 | */ |
||
157 | acpi_ut_remove_reference(info->return_object); |
||
158 | goto cleanup; |
||
159 | } |
||
160 | |||
161 | /* Is the return object one of the expected types? */ |
||
162 | |||
163 | if (!(expected_return_btypes & return_btype)) { |
||
164 | ACPI_ERROR_METHOD("Return object type is incorrect", |
||
165 | prefix_node, path, AE_TYPE); |
||
166 | |||
167 | ACPI_ERROR((AE_INFO, |
||
168 | "Type returned from %s was incorrect: %s, expected Btypes: 0x%X", |
||
169 | path, |
||
170 | acpi_ut_get_object_type_name(info->return_object), |
||
171 | expected_return_btypes)); |
||
172 | |||
173 | /* On error exit, we must delete the return object */ |
||
174 | |||
175 | acpi_ut_remove_reference(info->return_object); |
||
176 | status = AE_TYPE; |
||
177 | goto cleanup; |
||
178 | } |
||
179 | |||
180 | /* Object type is OK, return it */ |
||
181 | |||
182 | *return_desc = info->return_object; |
||
183 | |||
184 | cleanup: |
||
185 | ACPI_FREE(info); |
||
186 | return_ACPI_STATUS(status); |
||
187 | } |
||
188 | |||
189 | /******************************************************************************* |
||
190 | * |
||
191 | * FUNCTION: acpi_ut_evaluate_numeric_object |
||
192 | * |
||
193 | * PARAMETERS: object_name - Object name to be evaluated |
||
194 | * device_node - Node for the device |
||
195 | * value - Where the value is returned |
||
196 | * |
||
197 | * RETURN: Status |
||
198 | * |
||
199 | * DESCRIPTION: Evaluates a numeric namespace object for a selected device |
||
200 | * and stores result in *Value. |
||
201 | * |
||
202 | * NOTE: Internal function, no parameter validation |
||
203 | * |
||
204 | ******************************************************************************/ |
||
205 | |||
206 | acpi_status |
||
207 | acpi_ut_evaluate_numeric_object(char *object_name, |
||
208 | struct acpi_namespace_node *device_node, |
||
209 | u64 *value) |
||
210 | { |
||
211 | union acpi_operand_object *obj_desc; |
||
212 | acpi_status status; |
||
213 | |||
214 | ACPI_FUNCTION_TRACE(ut_evaluate_numeric_object); |
||
215 | |||
216 | status = acpi_ut_evaluate_object(device_node, object_name, |
||
217 | ACPI_BTYPE_INTEGER, &obj_desc); |
||
218 | if (ACPI_FAILURE(status)) { |
||
219 | return_ACPI_STATUS(status); |
||
220 | } |
||
221 | |||
222 | /* Get the returned Integer */ |
||
223 | |||
224 | *value = obj_desc->integer.value; |
||
225 | |||
226 | /* On exit, we must delete the return object */ |
||
227 | |||
228 | acpi_ut_remove_reference(obj_desc); |
||
229 | return_ACPI_STATUS(status); |
||
230 | } |
||
231 | |||
232 | /******************************************************************************* |
||
233 | * |
||
234 | * FUNCTION: acpi_ut_execute_STA |
||
235 | * |
||
236 | * PARAMETERS: device_node - Node for the device |
||
237 | * flags - Where the status flags are returned |
||
238 | * |
||
239 | * RETURN: Status |
||
240 | * |
||
241 | * DESCRIPTION: Executes _STA for selected device and stores results in |
||
242 | * *Flags. If _STA does not exist, then the device is assumed |
||
243 | * to be present/functional/enabled (as per the ACPI spec). |
||
244 | * |
||
245 | * NOTE: Internal function, no parameter validation |
||
246 | * |
||
247 | ******************************************************************************/ |
||
248 | |||
249 | acpi_status |
||
250 | acpi_ut_execute_STA(struct acpi_namespace_node *device_node, u32 * flags) |
||
251 | { |
||
252 | union acpi_operand_object *obj_desc; |
||
253 | acpi_status status; |
||
254 | |||
255 | ACPI_FUNCTION_TRACE(ut_execute_STA); |
||
256 | |||
257 | status = acpi_ut_evaluate_object(device_node, METHOD_NAME__STA, |
||
258 | ACPI_BTYPE_INTEGER, &obj_desc); |
||
259 | if (ACPI_FAILURE(status)) { |
||
260 | if (AE_NOT_FOUND == status) { |
||
261 | /* |
||
262 | * if _STA does not exist, then (as per the ACPI specification), |
||
263 | * the returned flags will indicate that the device is present, |
||
264 | * functional, and enabled. |
||
265 | */ |
||
266 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
||
267 | "_STA on %4.4s was not found, assuming device is present\n", |
||
268 | acpi_ut_get_node_name(device_node))); |
||
269 | |||
270 | *flags = ACPI_UINT32_MAX; |
||
271 | status = AE_OK; |
||
272 | } |
||
273 | |||
274 | return_ACPI_STATUS(status); |
||
275 | } |
||
276 | |||
277 | /* Extract the status flags */ |
||
278 | |||
279 | *flags = (u32) obj_desc->integer.value; |
||
280 | |||
281 | /* On exit, we must delete the return object */ |
||
282 | |||
283 | acpi_ut_remove_reference(obj_desc); |
||
284 | return_ACPI_STATUS(status); |
||
285 | } |
||
286 | |||
287 | /******************************************************************************* |
||
288 | * |
||
289 | * FUNCTION: acpi_ut_execute_power_methods |
||
290 | * |
||
291 | * PARAMETERS: device_node - Node for the device |
||
292 | * method_names - Array of power method names |
||
293 | * method_count - Number of methods to execute |
||
294 | * out_values - Where the power method values are returned |
||
295 | * |
||
296 | * RETURN: Status, out_values |
||
297 | * |
||
298 | * DESCRIPTION: Executes the specified power methods for the device and returns |
||
299 | * the result(s). |
||
300 | * |
||
301 | * NOTE: Internal function, no parameter validation |
||
302 | * |
||
303 | ******************************************************************************/ |
||
304 | |||
305 | acpi_status |
||
306 | acpi_ut_execute_power_methods(struct acpi_namespace_node *device_node, |
||
307 | const char **method_names, |
||
308 | u8 method_count, u8 *out_values) |
||
309 | { |
||
310 | union acpi_operand_object *obj_desc; |
||
311 | acpi_status status; |
||
312 | acpi_status final_status = AE_NOT_FOUND; |
||
313 | u32 i; |
||
314 | |||
315 | ACPI_FUNCTION_TRACE(ut_execute_power_methods); |
||
316 | |||
317 | for (i = 0; i < method_count; i++) { |
||
318 | /* |
||
319 | * Execute the power method (_sx_d or _sx_w). The only allowable |
||
320 | * return type is an Integer. |
||
321 | */ |
||
322 | status = acpi_ut_evaluate_object(device_node, |
||
323 | ACPI_CAST_PTR(char, |
||
324 | method_names[i]), |
||
325 | ACPI_BTYPE_INTEGER, &obj_desc); |
||
326 | if (ACPI_SUCCESS(status)) { |
||
327 | out_values[i] = (u8)obj_desc->integer.value; |
||
328 | |||
329 | /* Delete the return object */ |
||
330 | |||
331 | acpi_ut_remove_reference(obj_desc); |
||
332 | final_status = AE_OK; /* At least one value is valid */ |
||
333 | continue; |
||
334 | } |
||
335 | |||
336 | out_values[i] = ACPI_UINT8_MAX; |
||
337 | if (status == AE_NOT_FOUND) { |
||
338 | continue; /* Ignore if not found */ |
||
339 | } |
||
340 | |||
341 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
||
342 | "Failed %s on Device %4.4s, %s\n", |
||
343 | ACPI_CAST_PTR(char, method_names[i]), |
||
344 | acpi_ut_get_node_name(device_node), |
||
345 | acpi_format_exception(status))); |
||
346 | } |
||
347 | |||
348 | return_ACPI_STATUS(final_status); |
||
349 | }> |