Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /******************************************************************************* |
| 2 | * |
| 3 | * Module Name: nsxfeval - Public interfaces to the ACPI subsystem |
| 4 | * ACPI Object evaluation interfaces |
| 5 | * |
| 6 | ******************************************************************************/ |
| 7 | |
| 8 | /* |
Bob Moore | fbb7a2d | 2014-02-08 09:42:25 +0800 | [diff] [blame] | 9 | * Copyright (C) 2000 - 2014, Intel Corp. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | * All rights reserved. |
| 11 | * |
| 12 | * Redistribution and use in source and binary forms, with or without |
| 13 | * modification, are permitted provided that the following conditions |
| 14 | * are met: |
| 15 | * 1. Redistributions of source code must retain the above copyright |
| 16 | * notice, this list of conditions, and the following disclaimer, |
| 17 | * without modification. |
| 18 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer |
| 19 | * substantially similar to the "NO WARRANTY" disclaimer below |
| 20 | * ("Disclaimer") and any redistribution must be conditioned upon |
| 21 | * including a substantially similar Disclaimer requirement for further |
| 22 | * binary redistribution. |
| 23 | * 3. Neither the names of the above-listed copyright holders nor the names |
| 24 | * of any contributors may be used to endorse or promote products derived |
| 25 | * from this software without specific prior written permission. |
| 26 | * |
| 27 | * Alternatively, this software may be distributed under the terms of the |
| 28 | * GNU General Public License ("GPL") version 2 as published by the Free |
| 29 | * Software Foundation. |
| 30 | * |
| 31 | * NO WARRANTY |
| 32 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 33 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 34 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR |
| 35 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 36 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 37 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 38 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 39 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 40 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| 41 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 42 | * POSSIBILITY OF SUCH DAMAGES. |
| 43 | */ |
| 44 | |
Lv Zheng | 839e928 | 2013-10-29 09:29:51 +0800 | [diff] [blame] | 45 | #define EXPORT_ACPI_INTERFACES |
| 46 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | #include <acpi/acpi.h> |
Len Brown | e2f7a77 | 2009-01-09 00:30:03 -0500 | [diff] [blame] | 48 | #include "accommon.h" |
| 49 | #include "acnamesp.h" |
| 50 | #include "acinterp.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | #define _COMPONENT ACPI_NAMESPACE |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 53 | ACPI_MODULE_NAME("nsxfeval") |
Lin Ming | bbc2413 | 2008-08-04 13:22:10 +0800 | [diff] [blame] | 54 | |
| 55 | /* Local prototypes */ |
| 56 | static void acpi_ns_resolve_references(struct acpi_evaluate_info *info); |
| 57 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | /******************************************************************************* |
| 59 | * |
| 60 | * FUNCTION: acpi_evaluate_object_typed |
| 61 | * |
Bob Moore | ba494be | 2012-07-12 09:40:10 +0800 | [diff] [blame] | 62 | * PARAMETERS: handle - Object handle (optional) |
| 63 | * pathname - Object pathname (optional) |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 64 | * external_params - List of parameters to pass to method, |
Bob Moore | 73a3090 | 2012-10-31 02:26:55 +0000 | [diff] [blame] | 65 | * terminated by NULL. May be NULL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | * if no parameters are being passed. |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 67 | * return_buffer - Where to put method's return value (if |
Bob Moore | 73a3090 | 2012-10-31 02:26:55 +0000 | [diff] [blame] | 68 | * any). If NULL, no value is returned. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | * return_type - Expected type of return object |
| 70 | * |
| 71 | * RETURN: Status |
| 72 | * |
| 73 | * DESCRIPTION: Find and evaluate the given object, passing the given |
Bob Moore | 73a3090 | 2012-10-31 02:26:55 +0000 | [diff] [blame] | 74 | * parameters if necessary. One of "Handle" or "Pathname" must |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | * be valid (non-null) |
| 76 | * |
| 77 | ******************************************************************************/ |
Lin Ming | bbc2413 | 2008-08-04 13:22:10 +0800 | [diff] [blame] | 78 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 80 | acpi_evaluate_object_typed(acpi_handle handle, |
| 81 | acpi_string pathname, |
Len Brown | fd35094 | 2007-05-09 23:34:35 -0400 | [diff] [blame] | 82 | struct acpi_object_list *external_params, |
| 83 | struct acpi_buffer *return_buffer, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 84 | acpi_object_type return_type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 86 | acpi_status status; |
Lv Zheng | bb3fec1 | 2014-01-08 13:43:23 +0800 | [diff] [blame] | 87 | u8 free_buffer_on_error = FALSE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 89 | ACPI_FUNCTION_TRACE(acpi_evaluate_object_typed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | |
| 91 | /* Return buffer must be valid */ |
| 92 | |
| 93 | if (!return_buffer) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 94 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | } |
| 96 | |
| 97 | if (return_buffer->length == ACPI_ALLOCATE_BUFFER) { |
Lv Zheng | bb3fec1 | 2014-01-08 13:43:23 +0800 | [diff] [blame] | 98 | free_buffer_on_error = TRUE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | } |
| 100 | |
| 101 | /* Evaluate the object */ |
| 102 | |
Lv Zheng | bb3fec1 | 2014-01-08 13:43:23 +0800 | [diff] [blame] | 103 | status = acpi_evaluate_object(handle, pathname, |
| 104 | external_params, return_buffer); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 105 | if (ACPI_FAILURE(status)) { |
| 106 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | } |
| 108 | |
| 109 | /* Type ANY means "don't care" */ |
| 110 | |
| 111 | if (return_type == ACPI_TYPE_ANY) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 112 | return_ACPI_STATUS(AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | } |
| 114 | |
| 115 | if (return_buffer->length == 0) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 116 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | /* Error because caller specifically asked for a return value */ |
| 118 | |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 119 | ACPI_ERROR((AE_INFO, "No return value")); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 120 | return_ACPI_STATUS(AE_NULL_OBJECT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | } |
| 122 | |
| 123 | /* Examine the object type returned from evaluate_object */ |
| 124 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 125 | if (((union acpi_object *)return_buffer->pointer)->type == return_type) { |
| 126 | return_ACPI_STATUS(AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | } |
| 128 | |
| 129 | /* Return object type does not match requested type */ |
| 130 | |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 131 | ACPI_ERROR((AE_INFO, |
| 132 | "Incorrect return type [%s] requested [%s]", |
| 133 | acpi_ut_get_type_name(((union acpi_object *)return_buffer-> |
| 134 | pointer)->type), |
| 135 | acpi_ut_get_type_name(return_type))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | |
Lv Zheng | bb3fec1 | 2014-01-08 13:43:23 +0800 | [diff] [blame] | 137 | if (free_buffer_on_error) { |
| 138 | /* |
| 139 | * Free a buffer created via ACPI_ALLOCATE_BUFFER. |
| 140 | * Note: We use acpi_os_free here because acpi_os_allocate was used |
| 141 | * to allocate the buffer. This purposefully bypasses the |
| 142 | * (optionally enabled) allocation tracking mechanism since we |
| 143 | * only want to track internal allocations. |
| 144 | */ |
| 145 | acpi_os_free(return_buffer->pointer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | return_buffer->pointer = NULL; |
| 147 | } |
| 148 | |
| 149 | return_buffer->length = 0; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 150 | return_ACPI_STATUS(AE_TYPE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | } |
Bob Moore | 8313524 | 2006-10-03 00:00:00 -0400 | [diff] [blame] | 152 | |
| 153 | ACPI_EXPORT_SYMBOL(acpi_evaluate_object_typed) |
Luca Tettamanti | 2c03d07 | 2009-04-07 15:32:59 +0200 | [diff] [blame] | 154 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | /******************************************************************************* |
| 156 | * |
| 157 | * FUNCTION: acpi_evaluate_object |
| 158 | * |
Bob Moore | ba494be | 2012-07-12 09:40:10 +0800 | [diff] [blame] | 159 | * PARAMETERS: handle - Object handle (optional) |
| 160 | * pathname - Object pathname (optional) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | * external_params - List of parameters to pass to method, |
Bob Moore | 73a3090 | 2012-10-31 02:26:55 +0000 | [diff] [blame] | 162 | * terminated by NULL. May be NULL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | * if no parameters are being passed. |
| 164 | * return_buffer - Where to put method's return value (if |
Bob Moore | 73a3090 | 2012-10-31 02:26:55 +0000 | [diff] [blame] | 165 | * any). If NULL, no value is returned. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | * |
| 167 | * RETURN: Status |
| 168 | * |
| 169 | * DESCRIPTION: Find and evaluate the given object, passing the given |
Bob Moore | 73a3090 | 2012-10-31 02:26:55 +0000 | [diff] [blame] | 170 | * parameters if necessary. One of "Handle" or "Pathname" must |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | * be valid (non-null) |
| 172 | * |
| 173 | ******************************************************************************/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 175 | acpi_evaluate_object(acpi_handle handle, |
| 176 | acpi_string pathname, |
| 177 | struct acpi_object_list *external_params, |
| 178 | struct acpi_buffer *return_buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 180 | acpi_status status; |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 181 | struct acpi_evaluate_info *info; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 182 | acpi_size buffer_space_needed; |
| 183 | u32 i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 185 | ACPI_FUNCTION_TRACE(acpi_evaluate_object); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 187 | /* Allocate and initialize the evaluation information block */ |
| 188 | |
| 189 | info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info)); |
| 190 | if (!info) { |
| 191 | return_ACPI_STATUS(AE_NO_MEMORY); |
| 192 | } |
| 193 | |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 194 | /* Convert and validate the device handle */ |
| 195 | |
Bob Moore | f24b664 | 2009-12-11 14:57:00 +0800 | [diff] [blame] | 196 | info->prefix_node = acpi_ns_validate_handle(handle); |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 197 | if (!info->prefix_node) { |
| 198 | status = AE_BAD_PARAMETER; |
| 199 | goto cleanup; |
| 200 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | |
| 202 | /* |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 203 | * Get the actual namespace node for the target object. |
| 204 | * Handles these cases: |
| 205 | * |
| 206 | * 1) Null node, valid pathname from root (absolute path) |
| 207 | * 2) Node and valid pathname (path relative to Node) |
| 208 | * 3) Node, Null pathname |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | */ |
Bob Moore | 04a81dc | 2012-12-31 00:05:17 +0000 | [diff] [blame] | 210 | if ((pathname) && (ACPI_IS_ROOT_PREFIX(pathname[0]))) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 211 | |
| 212 | /* The path is fully qualified, just evaluate by name */ |
| 213 | |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 214 | info->prefix_node = NULL; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 215 | } else if (!handle) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | /* |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 217 | * A handle is optional iff a fully qualified pathname is specified. |
| 218 | * Since we've already handled fully qualified names above, this is |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 219 | * an error. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | */ |
| 221 | if (!pathname) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 222 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 223 | "Both Handle and Pathname are NULL")); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 224 | } else { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 225 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 226 | "Null Handle with relative pathname [%s]", |
| 227 | pathname)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | } |
| 229 | |
| 230 | status = AE_BAD_PARAMETER; |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 231 | goto cleanup; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | } |
| 233 | |
Bob Moore | 29a241c | 2013-05-30 10:00:01 +0800 | [diff] [blame] | 234 | info->relative_pathname = pathname; |
| 235 | |
| 236 | /* |
| 237 | * Convert all external objects passed as arguments to the |
| 238 | * internal version(s). |
| 239 | */ |
| 240 | if (external_params && external_params->count) { |
| 241 | info->param_count = (u16)external_params->count; |
| 242 | |
| 243 | /* Warn on impossible argument count */ |
| 244 | |
| 245 | if (info->param_count > ACPI_METHOD_NUM_ARGS) { |
| 246 | ACPI_WARN_PREDEFINED((AE_INFO, pathname, |
| 247 | ACPI_WARN_ALWAYS, |
| 248 | "Excess arguments (%u) - using only %u", |
| 249 | info->param_count, |
| 250 | ACPI_METHOD_NUM_ARGS)); |
| 251 | |
| 252 | info->param_count = ACPI_METHOD_NUM_ARGS; |
| 253 | } |
| 254 | |
| 255 | /* |
| 256 | * Allocate a new parameter block for the internal objects |
| 257 | * Add 1 to count to allow for null terminated internal list |
| 258 | */ |
| 259 | info->parameters = ACPI_ALLOCATE_ZEROED(((acpi_size) info-> |
| 260 | param_count + |
| 261 | 1) * sizeof(void *)); |
| 262 | if (!info->parameters) { |
| 263 | status = AE_NO_MEMORY; |
| 264 | goto cleanup; |
| 265 | } |
| 266 | |
| 267 | /* Convert each external object in the list to an internal object */ |
| 268 | |
| 269 | for (i = 0; i < info->param_count; i++) { |
| 270 | status = |
| 271 | acpi_ut_copy_eobject_to_iobject(&external_params-> |
| 272 | pointer[i], |
| 273 | &info-> |
| 274 | parameters[i]); |
| 275 | if (ACPI_FAILURE(status)) { |
| 276 | goto cleanup; |
| 277 | } |
| 278 | } |
| 279 | |
| 280 | info->parameters[info->param_count] = NULL; |
| 281 | } |
| 282 | |
| 283 | #if 0 |
| 284 | |
| 285 | /* |
| 286 | * Begin incoming argument count analysis. Check for too few args |
| 287 | * and too many args. |
| 288 | */ |
| 289 | |
| 290 | switch (acpi_ns_get_type(info->node)) { |
| 291 | case ACPI_TYPE_METHOD: |
| 292 | |
| 293 | /* Check incoming argument count against the method definition */ |
| 294 | |
| 295 | if (info->obj_desc->method.param_count > info->param_count) { |
| 296 | ACPI_ERROR((AE_INFO, |
| 297 | "Insufficient arguments (%u) - %u are required", |
| 298 | info->param_count, |
| 299 | info->obj_desc->method.param_count)); |
| 300 | |
| 301 | status = AE_MISSING_ARGUMENTS; |
| 302 | goto cleanup; |
| 303 | } |
| 304 | |
| 305 | else if (info->obj_desc->method.param_count < info->param_count) { |
| 306 | ACPI_WARNING((AE_INFO, |
| 307 | "Excess arguments (%u) - only %u are required", |
| 308 | info->param_count, |
| 309 | info->obj_desc->method.param_count)); |
| 310 | |
| 311 | /* Just pass the required number of arguments */ |
| 312 | |
| 313 | info->param_count = info->obj_desc->method.param_count; |
| 314 | } |
| 315 | |
| 316 | /* |
| 317 | * Any incoming external objects to be passed as arguments to the |
| 318 | * method must be converted to internal objects |
| 319 | */ |
| 320 | if (info->param_count) { |
| 321 | /* |
| 322 | * Allocate a new parameter block for the internal objects |
| 323 | * Add 1 to count to allow for null terminated internal list |
| 324 | */ |
| 325 | info->parameters = ACPI_ALLOCATE_ZEROED(((acpi_size) |
| 326 | info-> |
| 327 | param_count + |
| 328 | 1) * |
| 329 | sizeof(void *)); |
| 330 | if (!info->parameters) { |
| 331 | status = AE_NO_MEMORY; |
| 332 | goto cleanup; |
| 333 | } |
| 334 | |
| 335 | /* Convert each external object in the list to an internal object */ |
| 336 | |
| 337 | for (i = 0; i < info->param_count; i++) { |
| 338 | status = |
| 339 | acpi_ut_copy_eobject_to_iobject |
| 340 | (&external_params->pointer[i], |
| 341 | &info->parameters[i]); |
| 342 | if (ACPI_FAILURE(status)) { |
| 343 | goto cleanup; |
| 344 | } |
| 345 | } |
| 346 | |
| 347 | info->parameters[info->param_count] = NULL; |
| 348 | } |
| 349 | break; |
| 350 | |
| 351 | default: |
| 352 | |
| 353 | /* Warn if arguments passed to an object that is not a method */ |
| 354 | |
| 355 | if (info->param_count) { |
| 356 | ACPI_WARNING((AE_INFO, |
| 357 | "%u arguments were passed to a non-method ACPI object", |
| 358 | info->param_count)); |
| 359 | } |
| 360 | break; |
| 361 | } |
| 362 | |
| 363 | #endif |
| 364 | |
| 365 | /* Now we can evaluate the object */ |
| 366 | |
| 367 | status = acpi_ns_evaluate(info); |
| 368 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | /* |
| 370 | * If we are expecting a return value, and all went well above, |
| 371 | * copy the return value to an external object. |
| 372 | */ |
| 373 | if (return_buffer) { |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 374 | if (!info->return_object) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | return_buffer->length = 0; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 376 | } else { |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 377 | if (ACPI_GET_DESCRIPTOR_TYPE(info->return_object) == |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 378 | ACPI_DESC_TYPE_NAMED) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | /* |
| 380 | * If we received a NS Node as a return object, this means that |
| 381 | * the object we are evaluating has nothing interesting to |
| 382 | * return (such as a mutex, etc.) We return an error because |
| 383 | * these types are essentially unsupported by this interface. |
| 384 | * We don't check up front because this makes it easier to add |
| 385 | * support for various types at a later date if necessary. |
| 386 | */ |
| 387 | status = AE_TYPE; |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 388 | info->return_object = NULL; /* No need to delete a NS Node */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | return_buffer->length = 0; |
| 390 | } |
| 391 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 392 | if (ACPI_SUCCESS(status)) { |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 393 | |
Lin Ming | bbc2413 | 2008-08-04 13:22:10 +0800 | [diff] [blame] | 394 | /* Dereference Index and ref_of references */ |
| 395 | |
| 396 | acpi_ns_resolve_references(info); |
| 397 | |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 398 | /* Get the size of the returned object */ |
| 399 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 400 | status = |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 401 | acpi_ut_get_object_size(info->return_object, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 402 | &buffer_space_needed); |
| 403 | if (ACPI_SUCCESS(status)) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 404 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | /* Validate/Allocate/Clear caller buffer */ |
| 406 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 407 | status = |
| 408 | acpi_ut_initialize_buffer |
| 409 | (return_buffer, |
| 410 | buffer_space_needed); |
| 411 | if (ACPI_FAILURE(status)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | /* |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 413 | * Caller's buffer is too small or a new one can't |
| 414 | * be allocated |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 416 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 417 | "Needed buffer size %X, %s\n", |
| 418 | (u32) |
| 419 | buffer_space_needed, |
| 420 | acpi_format_exception |
| 421 | (status))); |
| 422 | } else { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 423 | /* We have enough space for the object, build it */ |
| 424 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 425 | status = |
| 426 | acpi_ut_copy_iobject_to_eobject |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 427 | (info->return_object, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 428 | return_buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | } |
| 430 | } |
| 431 | } |
| 432 | } |
| 433 | } |
| 434 | |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 435 | if (info->return_object) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | /* |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 437 | * Delete the internal return object. NOTE: Interpreter must be |
| 438 | * locked to avoid race condition. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | */ |
Len Brown | 4d2acd9 | 2007-05-09 22:56:38 -0400 | [diff] [blame] | 440 | acpi_ex_enter_interpreter(); |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 441 | |
Len Brown | 4d2acd9 | 2007-05-09 22:56:38 -0400 | [diff] [blame] | 442 | /* Remove one reference on the return object (should delete it) */ |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 443 | |
Len Brown | 4d2acd9 | 2007-05-09 22:56:38 -0400 | [diff] [blame] | 444 | acpi_ut_remove_reference(info->return_object); |
| 445 | acpi_ex_exit_interpreter(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | } |
| 447 | |
Lv Zheng | 10622bf | 2013-10-29 09:30:02 +0800 | [diff] [blame] | 448 | cleanup: |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 449 | |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 450 | /* Free the input parameter list (if we created one) */ |
| 451 | |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 452 | if (info->parameters) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 453 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | /* Free the allocated parameter block */ |
| 455 | |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 456 | acpi_ut_delete_internal_object_list(info->parameters); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | } |
| 458 | |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 459 | ACPI_FREE(info); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 460 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | |
Bob Moore | 8313524 | 2006-10-03 00:00:00 -0400 | [diff] [blame] | 463 | ACPI_EXPORT_SYMBOL(acpi_evaluate_object) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | |
| 465 | /******************************************************************************* |
| 466 | * |
Lin Ming | bbc2413 | 2008-08-04 13:22:10 +0800 | [diff] [blame] | 467 | * FUNCTION: acpi_ns_resolve_references |
| 468 | * |
Bob Moore | ba494be | 2012-07-12 09:40:10 +0800 | [diff] [blame] | 469 | * PARAMETERS: info - Evaluation info block |
Lin Ming | bbc2413 | 2008-08-04 13:22:10 +0800 | [diff] [blame] | 470 | * |
| 471 | * RETURN: Info->return_object is replaced with the dereferenced object |
| 472 | * |
| 473 | * DESCRIPTION: Dereference certain reference objects. Called before an |
| 474 | * internal return object is converted to an external union acpi_object. |
| 475 | * |
| 476 | * Performs an automatic dereference of Index and ref_of reference objects. |
| 477 | * These reference objects are not supported by the union acpi_object, so this is a |
| 478 | * last resort effort to return something useful. Also, provides compatibility |
| 479 | * with other ACPI implementations. |
| 480 | * |
| 481 | * NOTE: does not handle references within returned package objects or nested |
| 482 | * references, but this support could be added later if found to be necessary. |
| 483 | * |
| 484 | ******************************************************************************/ |
| 485 | static void acpi_ns_resolve_references(struct acpi_evaluate_info *info) |
| 486 | { |
| 487 | union acpi_operand_object *obj_desc = NULL; |
| 488 | struct acpi_namespace_node *node; |
| 489 | |
| 490 | /* We are interested in reference objects only */ |
| 491 | |
Bob Moore | 3371c19 | 2009-02-18 14:44:03 +0800 | [diff] [blame] | 492 | if ((info->return_object)->common.type != ACPI_TYPE_LOCAL_REFERENCE) { |
Lin Ming | bbc2413 | 2008-08-04 13:22:10 +0800 | [diff] [blame] | 493 | return; |
| 494 | } |
| 495 | |
| 496 | /* |
| 497 | * Two types of references are supported - those created by Index and |
| 498 | * ref_of operators. A name reference (AML_NAMEPATH_OP) can be converted |
| 499 | * to an union acpi_object, so it is not dereferenced here. A ddb_handle |
| 500 | * (AML_LOAD_OP) cannot be dereferenced, nor can it be converted to |
| 501 | * an union acpi_object. |
| 502 | */ |
Bob Moore | 1044f1f | 2008-09-27 11:08:41 +0800 | [diff] [blame] | 503 | switch (info->return_object->reference.class) { |
| 504 | case ACPI_REFCLASS_INDEX: |
Lin Ming | bbc2413 | 2008-08-04 13:22:10 +0800 | [diff] [blame] | 505 | |
| 506 | obj_desc = *(info->return_object->reference.where); |
| 507 | break; |
| 508 | |
Bob Moore | 1044f1f | 2008-09-27 11:08:41 +0800 | [diff] [blame] | 509 | case ACPI_REFCLASS_REFOF: |
Lin Ming | bbc2413 | 2008-08-04 13:22:10 +0800 | [diff] [blame] | 510 | |
| 511 | node = info->return_object->reference.object; |
| 512 | if (node) { |
| 513 | obj_desc = node->object; |
| 514 | } |
| 515 | break; |
| 516 | |
| 517 | default: |
Chao Guan | 1d1ea1b | 2013-06-08 00:58:14 +0000 | [diff] [blame] | 518 | |
Lin Ming | bbc2413 | 2008-08-04 13:22:10 +0800 | [diff] [blame] | 519 | return; |
| 520 | } |
| 521 | |
| 522 | /* Replace the existing reference object */ |
| 523 | |
| 524 | if (obj_desc) { |
| 525 | acpi_ut_add_reference(obj_desc); |
| 526 | acpi_ut_remove_reference(info->return_object); |
| 527 | info->return_object = obj_desc; |
| 528 | } |
| 529 | |
| 530 | return; |
| 531 | } |
| 532 | |
| 533 | /******************************************************************************* |
| 534 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | * FUNCTION: acpi_walk_namespace |
| 536 | * |
Bob Moore | ba494be | 2012-07-12 09:40:10 +0800 | [diff] [blame] | 537 | * PARAMETERS: type - acpi_object_type to search for |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | * start_object - Handle in namespace where search begins |
| 539 | * max_depth - Depth to which search is to reach |
Bob Moore | 4ef1750 | 2013-08-08 15:30:05 +0800 | [diff] [blame] | 540 | * descending_callback - Called during tree descent |
Lin Ming | 2263576 | 2009-11-13 10:06:08 +0800 | [diff] [blame] | 541 | * when an object of "Type" is found |
Bob Moore | 4ef1750 | 2013-08-08 15:30:05 +0800 | [diff] [blame] | 542 | * ascending_callback - Called during tree ascent |
Lin Ming | 2263576 | 2009-11-13 10:06:08 +0800 | [diff] [blame] | 543 | * when an object of "Type" is found |
Bob Moore | ba494be | 2012-07-12 09:40:10 +0800 | [diff] [blame] | 544 | * context - Passed to user function(s) above |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | * return_value - Location where return value of |
| 546 | * user_function is put if terminated early |
| 547 | * |
| 548 | * RETURNS Return value from the user_function if terminated early. |
| 549 | * Otherwise, returns NULL. |
| 550 | * |
| 551 | * DESCRIPTION: Performs a modified depth-first walk of the namespace tree, |
| 552 | * starting (and ending) at the object specified by start_handle. |
Lin Ming | 2263576 | 2009-11-13 10:06:08 +0800 | [diff] [blame] | 553 | * The callback function is called whenever an object that matches |
| 554 | * the type parameter is found. If the callback function returns |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | * a non-zero value, the search is terminated immediately and this |
| 556 | * value is returned to the caller. |
| 557 | * |
| 558 | * The point of this procedure is to provide a generic namespace |
| 559 | * walk routine that can be called from multiple places to |
Lin Ming | 2263576 | 2009-11-13 10:06:08 +0800 | [diff] [blame] | 560 | * provide multiple services; the callback function(s) can be |
| 561 | * tailored to each task, whether it is a print function, |
| 562 | * a compare function, etc. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | * |
| 564 | ******************************************************************************/ |
Lin Ming | bbc2413 | 2008-08-04 13:22:10 +0800 | [diff] [blame] | 565 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 567 | acpi_walk_namespace(acpi_object_type type, |
| 568 | acpi_handle start_object, |
| 569 | u32 max_depth, |
Bob Moore | 4ef1750 | 2013-08-08 15:30:05 +0800 | [diff] [blame] | 570 | acpi_walk_callback descending_callback, |
| 571 | acpi_walk_callback ascending_callback, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 572 | void *context, void **return_value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 574 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 576 | ACPI_FUNCTION_TRACE(acpi_walk_namespace); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | |
| 578 | /* Parameter validation */ |
| 579 | |
Lin Ming | 2263576 | 2009-11-13 10:06:08 +0800 | [diff] [blame] | 580 | if ((type > ACPI_TYPE_LOCAL_MAX) || |
Bob Moore | 4ef1750 | 2013-08-08 15:30:05 +0800 | [diff] [blame] | 581 | (!max_depth) || (!descending_callback && !ascending_callback)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 582 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | } |
| 584 | |
| 585 | /* |
Bob Moore | 8a335a23 | 2009-03-09 16:31:04 +0800 | [diff] [blame] | 586 | * Need to acquire the namespace reader lock to prevent interference |
| 587 | * with any concurrent table unloads (which causes the deletion of |
| 588 | * namespace objects). We cannot allow the deletion of a namespace node |
| 589 | * while the user function is using it. The exception to this are the |
| 590 | * nodes created and deleted during control method execution -- these |
| 591 | * nodes are marked as temporary nodes and are ignored by the namespace |
| 592 | * walk. Thus, control methods can be executed while holding the |
| 593 | * namespace deletion lock (and the user function can execute control |
| 594 | * methods.) |
| 595 | */ |
| 596 | status = acpi_ut_acquire_read_lock(&acpi_gbl_namespace_rw_lock); |
| 597 | if (ACPI_FAILURE(status)) { |
Lv Zheng | 7b6afb6 | 2012-12-19 05:37:29 +0000 | [diff] [blame] | 598 | return_ACPI_STATUS(status); |
Bob Moore | 8a335a23 | 2009-03-09 16:31:04 +0800 | [diff] [blame] | 599 | } |
| 600 | |
| 601 | /* |
| 602 | * Lock the namespace around the walk. The namespace will be |
| 603 | * unlocked/locked around each call to the user function - since the user |
| 604 | * function must be allowed to make ACPICA calls itself (for example, it |
| 605 | * will typically execute control methods during device enumeration.) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 607 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
| 608 | if (ACPI_FAILURE(status)) { |
Bob Moore | 8a335a23 | 2009-03-09 16:31:04 +0800 | [diff] [blame] | 609 | goto unlock_and_exit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | } |
| 611 | |
Bob Moore | d53d820 | 2013-09-23 09:51:58 +0800 | [diff] [blame] | 612 | /* Now we can validate the starting node */ |
| 613 | |
| 614 | if (!acpi_ns_validate_handle(start_object)) { |
| 615 | status = AE_BAD_PARAMETER; |
| 616 | goto unlock_and_exit2; |
| 617 | } |
| 618 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 619 | status = acpi_ns_walk_namespace(type, start_object, max_depth, |
Bob Moore | 4ef1750 | 2013-08-08 15:30:05 +0800 | [diff] [blame] | 620 | ACPI_NS_WALK_UNLOCK, |
| 621 | descending_callback, ascending_callback, |
| 622 | context, return_value); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 623 | |
Lv Zheng | 10622bf | 2013-10-29 09:30:02 +0800 | [diff] [blame] | 624 | unlock_and_exit2: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 625 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
Bob Moore | 8a335a23 | 2009-03-09 16:31:04 +0800 | [diff] [blame] | 626 | |
Lv Zheng | 10622bf | 2013-10-29 09:30:02 +0800 | [diff] [blame] | 627 | unlock_and_exit: |
Bob Moore | 8a335a23 | 2009-03-09 16:31:04 +0800 | [diff] [blame] | 628 | (void)acpi_ut_release_read_lock(&acpi_gbl_namespace_rw_lock); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 629 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 631 | |
Bob Moore | 8313524 | 2006-10-03 00:00:00 -0400 | [diff] [blame] | 632 | ACPI_EXPORT_SYMBOL(acpi_walk_namespace) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | |
| 634 | /******************************************************************************* |
| 635 | * |
| 636 | * FUNCTION: acpi_ns_get_device_callback |
| 637 | * |
| 638 | * PARAMETERS: Callback from acpi_get_device |
| 639 | * |
| 640 | * RETURN: Status |
| 641 | * |
| 642 | * DESCRIPTION: Takes callbacks from walk_namespace and filters out all non- |
| 643 | * present devices, or if they specified a HID, it filters based |
| 644 | * on that. |
| 645 | * |
| 646 | ******************************************************************************/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 647 | static acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 648 | acpi_ns_get_device_callback(acpi_handle obj_handle, |
| 649 | u32 nesting_level, |
| 650 | void *context, void **return_value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 652 | struct acpi_get_devices_info *info = context; |
| 653 | acpi_status status; |
| 654 | struct acpi_namespace_node *node; |
| 655 | u32 flags; |
Lv Zheng | 78e25fe | 2012-10-31 02:25:24 +0000 | [diff] [blame] | 656 | struct acpi_pnp_device_id *hid; |
| 657 | struct acpi_pnp_device_id_list *cid; |
Bob Moore | 67a119f | 2008-06-10 13:42:13 +0800 | [diff] [blame] | 658 | u32 i; |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 659 | u8 found; |
| 660 | int no_match; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 662 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
| 663 | if (ACPI_FAILURE(status)) { |
Lv Zheng | 7b6afb6 | 2012-12-19 05:37:29 +0000 | [diff] [blame] | 664 | return (status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | } |
| 666 | |
Bob Moore | f24b664 | 2009-12-11 14:57:00 +0800 | [diff] [blame] | 667 | node = acpi_ns_validate_handle(obj_handle); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 668 | status = acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
| 669 | if (ACPI_FAILURE(status)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | return (status); |
| 671 | } |
| 672 | |
| 673 | if (!node) { |
| 674 | return (AE_BAD_PARAMETER); |
| 675 | } |
| 676 | |
Lin Ming | 5f8902ac | 2010-01-21 09:15:20 +0800 | [diff] [blame] | 677 | /* |
| 678 | * First, filter based on the device HID and CID. |
| 679 | * |
| 680 | * 01/2010: For this case where a specific HID is requested, we don't |
| 681 | * want to run _STA until we have an actual HID match. Thus, we will |
| 682 | * not unnecessarily execute _STA on devices for which the caller |
| 683 | * doesn't care about. Previously, _STA was executed unconditionally |
| 684 | * on all devices found here. |
| 685 | * |
| 686 | * A side-effect of this change is that now we will continue to search |
| 687 | * for a matching HID even under device trees where the parent device |
| 688 | * would have returned a _STA that indicates it is not present or |
| 689 | * not functioning (thus aborting the search on that branch). |
| 690 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 691 | if (info->hid != NULL) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 692 | status = acpi_ut_execute_HID(node, &hid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | if (status == AE_NOT_FOUND) { |
| 694 | return (AE_OK); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 695 | } else if (ACPI_FAILURE(status)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | return (AE_CTRL_DEPTH); |
| 697 | } |
| 698 | |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 699 | no_match = ACPI_STRCMP(hid->string, info->hid); |
| 700 | ACPI_FREE(hid); |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 701 | |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 702 | if (no_match) { |
| 703 | /* |
| 704 | * HID does not match, attempt match within the |
| 705 | * list of Compatible IDs (CIDs) |
| 706 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 707 | status = acpi_ut_execute_CID(node, &cid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | if (status == AE_NOT_FOUND) { |
| 709 | return (AE_OK); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 710 | } else if (ACPI_FAILURE(status)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | return (AE_CTRL_DEPTH); |
| 712 | } |
| 713 | |
| 714 | /* Walk the CID list */ |
| 715 | |
Lv Zheng | 739dcbb | 2012-12-20 01:07:26 +0000 | [diff] [blame] | 716 | found = FALSE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | for (i = 0; i < cid->count; i++) { |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 718 | if (ACPI_STRCMP(cid->ids[i].string, info->hid) |
| 719 | == 0) { |
Lv Zheng | 3e8214e | 2012-12-19 05:37:15 +0000 | [diff] [blame] | 720 | |
Lv Zheng | 75c8044 | 2012-12-19 05:36:49 +0000 | [diff] [blame] | 721 | /* Found a matching CID */ |
Lv Zheng | 3e8214e | 2012-12-19 05:37:15 +0000 | [diff] [blame] | 722 | |
Lv Zheng | 739dcbb | 2012-12-20 01:07:26 +0000 | [diff] [blame] | 723 | found = TRUE; |
Andrew Patterson | 02f8a85 | 2008-01-22 17:18:22 -0700 | [diff] [blame] | 724 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | } |
| 726 | } |
Lv Zheng | 739dcbb | 2012-12-20 01:07:26 +0000 | [diff] [blame] | 727 | |
Bob Moore | 8313524 | 2006-10-03 00:00:00 -0400 | [diff] [blame] | 728 | ACPI_FREE(cid); |
Lv Zheng | 739dcbb | 2012-12-20 01:07:26 +0000 | [diff] [blame] | 729 | if (!found) { |
Andrew Patterson | 02f8a85 | 2008-01-22 17:18:22 -0700 | [diff] [blame] | 730 | return (AE_OK); |
Lv Zheng | 739dcbb | 2012-12-20 01:07:26 +0000 | [diff] [blame] | 731 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | } |
| 733 | } |
| 734 | |
Lin Ming | 5f8902ac | 2010-01-21 09:15:20 +0800 | [diff] [blame] | 735 | /* Run _STA to determine if device is present */ |
| 736 | |
| 737 | status = acpi_ut_execute_STA(node, &flags); |
| 738 | if (ACPI_FAILURE(status)) { |
| 739 | return (AE_CTRL_DEPTH); |
| 740 | } |
| 741 | |
| 742 | if (!(flags & ACPI_STA_DEVICE_PRESENT) && |
| 743 | !(flags & ACPI_STA_DEVICE_FUNCTIONING)) { |
| 744 | /* |
| 745 | * Don't examine the children of the device only when the |
| 746 | * device is neither present nor functional. See ACPI spec, |
| 747 | * description of _STA for more information. |
| 748 | */ |
| 749 | return (AE_CTRL_DEPTH); |
| 750 | } |
| 751 | |
| 752 | /* We have a valid device, invoke the user function */ |
| 753 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 754 | status = info->user_function(obj_handle, nesting_level, info->context, |
| 755 | return_value); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | return (status); |
| 757 | } |
| 758 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | /******************************************************************************* |
| 760 | * |
| 761 | * FUNCTION: acpi_get_devices |
| 762 | * |
| 763 | * PARAMETERS: HID - HID to search for. Can be NULL. |
| 764 | * user_function - Called when a matching object is found |
Bob Moore | ba494be | 2012-07-12 09:40:10 +0800 | [diff] [blame] | 765 | * context - Passed to user function |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | * return_value - Location where return value of |
| 767 | * user_function is put if terminated early |
| 768 | * |
| 769 | * RETURNS Return value from the user_function if terminated early. |
| 770 | * Otherwise, returns NULL. |
| 771 | * |
| 772 | * DESCRIPTION: Performs a modified depth-first walk of the namespace tree, |
| 773 | * starting (and ending) at the object specified by start_handle. |
| 774 | * The user_function is called whenever an object of type |
Bob Moore | 73a3090 | 2012-10-31 02:26:55 +0000 | [diff] [blame] | 775 | * Device is found. If the user function returns |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 776 | * a non-zero value, the search is terminated immediately and this |
| 777 | * value is returned to the caller. |
| 778 | * |
| 779 | * This is a wrapper for walk_namespace, but the callback performs |
Bob Moore | 549f460 | 2008-04-10 19:06:41 +0400 | [diff] [blame] | 780 | * additional filtering. Please see acpi_ns_get_device_callback. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | * |
| 782 | ******************************************************************************/ |
| 783 | |
| 784 | acpi_status |
Al Viro | 70b30fb | 2007-08-21 16:18:20 +0100 | [diff] [blame] | 785 | acpi_get_devices(const char *HID, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 786 | acpi_walk_callback user_function, |
| 787 | void *context, void **return_value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 789 | acpi_status status; |
| 790 | struct acpi_get_devices_info info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 792 | ACPI_FUNCTION_TRACE(acpi_get_devices); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | |
| 794 | /* Parameter validation */ |
| 795 | |
| 796 | if (!user_function) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 797 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | } |
| 799 | |
| 800 | /* |
| 801 | * We're going to call their callback from OUR callback, so we need |
| 802 | * to know what it is, and their context parameter. |
| 803 | */ |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 804 | info.hid = HID; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 805 | info.context = context; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | info.user_function = user_function; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | |
| 808 | /* |
| 809 | * Lock the namespace around the walk. |
| 810 | * The namespace will be unlocked/locked around each call |
| 811 | * to the user function - since this function |
| 812 | * must be allowed to make Acpi calls itself. |
| 813 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 814 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
| 815 | if (ACPI_FAILURE(status)) { |
| 816 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 817 | } |
| 818 | |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 819 | status = acpi_ns_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, |
| 820 | ACPI_UINT32_MAX, ACPI_NS_WALK_UNLOCK, |
Lin Ming | 2263576 | 2009-11-13 10:06:08 +0800 | [diff] [blame] | 821 | acpi_ns_get_device_callback, NULL, |
| 822 | &info, return_value); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 823 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 824 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
| 825 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 826 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 827 | |
Bob Moore | 8313524 | 2006-10-03 00:00:00 -0400 | [diff] [blame] | 828 | ACPI_EXPORT_SYMBOL(acpi_get_devices) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | |
| 830 | /******************************************************************************* |
| 831 | * |
| 832 | * FUNCTION: acpi_attach_data |
| 833 | * |
| 834 | * PARAMETERS: obj_handle - Namespace node |
Bob Moore | ba494be | 2012-07-12 09:40:10 +0800 | [diff] [blame] | 835 | * handler - Handler for this attachment |
| 836 | * data - Pointer to data to be attached |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 837 | * |
| 838 | * RETURN: Status |
| 839 | * |
| 840 | * DESCRIPTION: Attach arbitrary data and handler to a namespace node. |
| 841 | * |
| 842 | ******************************************************************************/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 843 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 844 | acpi_attach_data(acpi_handle obj_handle, |
| 845 | acpi_object_handler handler, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 847 | struct acpi_namespace_node *node; |
| 848 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 849 | |
| 850 | /* Parameter validation */ |
| 851 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 852 | if (!obj_handle || !handler || !data) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | return (AE_BAD_PARAMETER); |
| 854 | } |
| 855 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 856 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
| 857 | if (ACPI_FAILURE(status)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | return (status); |
| 859 | } |
| 860 | |
| 861 | /* Convert and validate the handle */ |
| 862 | |
Bob Moore | f24b664 | 2009-12-11 14:57:00 +0800 | [diff] [blame] | 863 | node = acpi_ns_validate_handle(obj_handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | if (!node) { |
| 865 | status = AE_BAD_PARAMETER; |
| 866 | goto unlock_and_exit; |
| 867 | } |
| 868 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 869 | status = acpi_ns_attach_data(node, handler, data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 870 | |
Lv Zheng | 10622bf | 2013-10-29 09:30:02 +0800 | [diff] [blame] | 871 | unlock_and_exit: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 872 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 873 | return (status); |
| 874 | } |
| 875 | |
Bob Moore | 8313524 | 2006-10-03 00:00:00 -0400 | [diff] [blame] | 876 | ACPI_EXPORT_SYMBOL(acpi_attach_data) |
| 877 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 878 | /******************************************************************************* |
| 879 | * |
| 880 | * FUNCTION: acpi_detach_data |
| 881 | * |
| 882 | * PARAMETERS: obj_handle - Namespace node handle |
Bob Moore | ba494be | 2012-07-12 09:40:10 +0800 | [diff] [blame] | 883 | * handler - Handler used in call to acpi_attach_data |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 884 | * |
| 885 | * RETURN: Status |
| 886 | * |
| 887 | * DESCRIPTION: Remove data that was previously attached to a node. |
| 888 | * |
| 889 | ******************************************************************************/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 891 | acpi_detach_data(acpi_handle obj_handle, acpi_object_handler handler) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 893 | struct acpi_namespace_node *node; |
| 894 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | |
| 896 | /* Parameter validation */ |
| 897 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 898 | if (!obj_handle || !handler) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 899 | return (AE_BAD_PARAMETER); |
| 900 | } |
| 901 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 902 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
| 903 | if (ACPI_FAILURE(status)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 904 | return (status); |
| 905 | } |
| 906 | |
| 907 | /* Convert and validate the handle */ |
| 908 | |
Bob Moore | f24b664 | 2009-12-11 14:57:00 +0800 | [diff] [blame] | 909 | node = acpi_ns_validate_handle(obj_handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | if (!node) { |
| 911 | status = AE_BAD_PARAMETER; |
| 912 | goto unlock_and_exit; |
| 913 | } |
| 914 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 915 | status = acpi_ns_detach_data(node, handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 916 | |
Lv Zheng | 10622bf | 2013-10-29 09:30:02 +0800 | [diff] [blame] | 917 | unlock_and_exit: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 918 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 919 | return (status); |
| 920 | } |
| 921 | |
Bob Moore | 8313524 | 2006-10-03 00:00:00 -0400 | [diff] [blame] | 922 | ACPI_EXPORT_SYMBOL(acpi_detach_data) |
| 923 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 924 | /******************************************************************************* |
| 925 | * |
Rafael J. Wysocki | 7c2e177 | 2014-02-04 00:42:46 +0100 | [diff] [blame] | 926 | * FUNCTION: acpi_get_data_full |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 927 | * |
| 928 | * PARAMETERS: obj_handle - Namespace node |
Bob Moore | ba494be | 2012-07-12 09:40:10 +0800 | [diff] [blame] | 929 | * handler - Handler used in call to attach_data |
| 930 | * data - Where the data is returned |
Rafael J. Wysocki | 7c2e177 | 2014-02-04 00:42:46 +0100 | [diff] [blame] | 931 | * callback - function to execute before returning |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 932 | * |
| 933 | * RETURN: Status |
| 934 | * |
Rafael J. Wysocki | 7c2e177 | 2014-02-04 00:42:46 +0100 | [diff] [blame] | 935 | * DESCRIPTION: Retrieve data that was previously attached to a namespace node |
| 936 | * and execute a callback before returning. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 937 | * |
| 938 | ******************************************************************************/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | acpi_status |
Rafael J. Wysocki | 7c2e177 | 2014-02-04 00:42:46 +0100 | [diff] [blame] | 940 | acpi_get_data_full(acpi_handle obj_handle, acpi_object_handler handler, |
| 941 | void **data, void (*callback)(void *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 942 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 943 | struct acpi_namespace_node *node; |
| 944 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | |
| 946 | /* Parameter validation */ |
| 947 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 948 | if (!obj_handle || !handler || !data) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 949 | return (AE_BAD_PARAMETER); |
| 950 | } |
| 951 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 952 | status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); |
| 953 | if (ACPI_FAILURE(status)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 954 | return (status); |
| 955 | } |
| 956 | |
| 957 | /* Convert and validate the handle */ |
| 958 | |
Bob Moore | f24b664 | 2009-12-11 14:57:00 +0800 | [diff] [blame] | 959 | node = acpi_ns_validate_handle(obj_handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 960 | if (!node) { |
| 961 | status = AE_BAD_PARAMETER; |
| 962 | goto unlock_and_exit; |
| 963 | } |
| 964 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 965 | status = acpi_ns_get_attached_data(node, handler, data); |
Rafael J. Wysocki | 7c2e177 | 2014-02-04 00:42:46 +0100 | [diff] [blame] | 966 | if (ACPI_SUCCESS(status) && callback) { |
| 967 | callback(*data); |
| 968 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 969 | |
Lv Zheng | 10622bf | 2013-10-29 09:30:02 +0800 | [diff] [blame] | 970 | unlock_and_exit: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 971 | (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | return (status); |
| 973 | } |
Bob Moore | 8313524 | 2006-10-03 00:00:00 -0400 | [diff] [blame] | 974 | |
Rafael J. Wysocki | 7c2e177 | 2014-02-04 00:42:46 +0100 | [diff] [blame] | 975 | ACPI_EXPORT_SYMBOL(acpi_get_data_full) |
| 976 | |
| 977 | /******************************************************************************* |
| 978 | * |
| 979 | * FUNCTION: acpi_get_data |
| 980 | * |
| 981 | * PARAMETERS: obj_handle - Namespace node |
| 982 | * handler - Handler used in call to attach_data |
| 983 | * data - Where the data is returned |
| 984 | * |
| 985 | * RETURN: Status |
| 986 | * |
| 987 | * DESCRIPTION: Retrieve data that was previously attached to a namespace node. |
| 988 | * |
| 989 | ******************************************************************************/ |
| 990 | acpi_status |
| 991 | acpi_get_data(acpi_handle obj_handle, acpi_object_handler handler, void **data) |
| 992 | { |
| 993 | return acpi_get_data_full(obj_handle, handler, data, NULL); |
| 994 | } |
| 995 | |
Bob Moore | 8313524 | 2006-10-03 00:00:00 -0400 | [diff] [blame] | 996 | ACPI_EXPORT_SYMBOL(acpi_get_data) |