1 /****************************************************************************** 2 * 3 * Module Name: uteval - Object evaluation 4 * 5 *****************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2018, Intel Corp. 12 * All rights reserved. 13 * 14 * 2. License 15 * 16 * 2.1. This is your license from Intel Corp. under its intellectual property 17 * rights. You may have additional license terms from the party that provided 18 * you this software, covering your right to use that party's intellectual 19 * property rights. 20 * 21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 22 * copy of the source code appearing in this file ("Covered Code") an 23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 24 * base code distributed originally by Intel ("Original Intel Code") to copy, 25 * make derivatives, distribute, use and display any portion of the Covered 26 * Code in any form, with the right to sublicense such rights; and 27 * 28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 29 * license (with the right to sublicense), under only those claims of Intel 30 * patents that are infringed by the Original Intel Code, to make, use, sell, 31 * offer to sell, and import the Covered Code and derivative works thereof 32 * solely to the minimum extent necessary to exercise the above copyright 33 * license, and in no event shall the patent license extend to any additions 34 * to or modifications of the Original Intel Code. No other license or right 35 * is granted directly or by implication, estoppel or otherwise; 36 * 37 * The above copyright and patent license is granted only if the following 38 * conditions are met: 39 * 40 * 3. Conditions 41 * 42 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 43 * Redistribution of source code of any substantial portion of the Covered 44 * Code or modification with rights to further distribute source must include 45 * the above Copyright Notice, the above License, this list of Conditions, 46 * and the following Disclaimer and Export Compliance provision. In addition, 47 * Licensee must cause all Covered Code to which Licensee contributes to 48 * contain a file documenting the changes Licensee made to create that Covered 49 * Code and the date of any change. Licensee must include in that file the 50 * documentation of any changes made by any predecessor Licensee. Licensee 51 * must include a prominent statement that the modification is derived, 52 * directly or indirectly, from Original Intel Code. 53 * 54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 55 * Redistribution of source code of any substantial portion of the Covered 56 * Code or modification without rights to further distribute source must 57 * include the following Disclaimer and Export Compliance provision in the 58 * documentation and/or other materials provided with distribution. In 59 * addition, Licensee may not authorize further sublicense of source of any 60 * portion of the Covered Code, and must include terms to the effect that the 61 * license from Licensee to its licensee is limited to the intellectual 62 * property embodied in the software Licensee provides to its licensee, and 63 * not to intellectual property embodied in modifications its licensee may 64 * make. 65 * 66 * 3.3. Redistribution of Executable. Redistribution in executable form of any 67 * substantial portion of the Covered Code or modification must reproduce the 68 * above Copyright Notice, and the following Disclaimer and Export Compliance 69 * provision in the documentation and/or other materials provided with the 70 * distribution. 71 * 72 * 3.4. Intel retains all right, title, and interest in and to the Original 73 * Intel Code. 74 * 75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 76 * Intel shall be used in advertising or otherwise to promote the sale, use or 77 * other dealings in products derived from or relating to the Covered Code 78 * without prior written authorization from Intel. 79 * 80 * 4. Disclaimer and Export Compliance 81 * 82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 88 * PARTICULAR PURPOSE. 89 * 90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 97 * LIMITED REMEDY. 98 * 99 * 4.3. Licensee shall not export, either directly or indirectly, any of this 100 * software or system incorporating such software without first obtaining any 101 * required license or other approval from the U. S. Department of Commerce or 102 * any other agency or department of the United States Government. In the 103 * event Licensee exports any such software from the United States or 104 * re-exports any such software from a foreign destination, Licensee shall 105 * ensure that the distribution and export/re-export of the software is in 106 * compliance with all laws, regulations, orders, or other restrictions of the 107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 108 * any of its subsidiaries will export/re-export any technical data, process, 109 * software, or service, directly or indirectly, to any country for which the 110 * United States government or any agency thereof requires an export license, 111 * other governmental approval, or letter of assurance, without first obtaining 112 * such license, approval or letter. 113 * 114 ***************************************************************************** 115 * 116 * Alternatively, you may choose to be licensed under the terms of the 117 * following license: 118 * 119 * Redistribution and use in source and binary forms, with or without 120 * modification, are permitted provided that the following conditions 121 * are met: 122 * 1. Redistributions of source code must retain the above copyright 123 * notice, this list of conditions, and the following disclaimer, 124 * without modification. 125 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 126 * substantially similar to the "NO WARRANTY" disclaimer below 127 * ("Disclaimer") and any redistribution must be conditioned upon 128 * including a substantially similar Disclaimer requirement for further 129 * binary redistribution. 130 * 3. Neither the names of the above-listed copyright holders nor the names 131 * of any contributors may be used to endorse or promote products derived 132 * from this software without specific prior written permission. 133 * 134 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 135 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 136 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 137 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 138 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 139 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 140 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 141 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 142 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 143 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 144 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 145 * 146 * Alternatively, you may choose to be licensed under the terms of the 147 * GNU General Public License ("GPL") version 2 as published by the Free 148 * Software Foundation. 149 * 150 *****************************************************************************/ 151 152 #include "acpi.h" 153 #include "accommon.h" 154 #include "acnamesp.h" 155 156 157 #define _COMPONENT ACPI_UTILITIES 158 ACPI_MODULE_NAME ("uteval") 159 160 161 /******************************************************************************* 162 * 163 * FUNCTION: AcpiUtEvaluateObject 164 * 165 * PARAMETERS: PrefixNode - Starting node 166 * Path - Path to object from starting node 167 * ExpectedReturnTypes - Bitmap of allowed return types 168 * ReturnDesc - Where a return value is stored 169 * 170 * RETURN: Status 171 * 172 * DESCRIPTION: Evaluates a namespace object and verifies the type of the 173 * return object. Common code that simplifies accessing objects 174 * that have required return objects of fixed types. 175 * 176 * NOTE: Internal function, no parameter validation 177 * 178 ******************************************************************************/ 179 180 ACPI_STATUS 181 AcpiUtEvaluateObject ( 182 ACPI_NAMESPACE_NODE *PrefixNode, 183 const char *Path, 184 UINT32 ExpectedReturnBtypes, 185 ACPI_OPERAND_OBJECT **ReturnDesc) 186 { 187 ACPI_EVALUATE_INFO *Info; 188 ACPI_STATUS Status; 189 UINT32 ReturnBtype; 190 191 192 ACPI_FUNCTION_TRACE (UtEvaluateObject); 193 194 195 /* Allocate the evaluation information block */ 196 197 Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO)); 198 if (!Info) 199 { 200 return_ACPI_STATUS (AE_NO_MEMORY); 201 } 202 203 Info->PrefixNode = PrefixNode; 204 Info->RelativePathname = Path; 205 206 /* Evaluate the object/method */ 207 208 Status = AcpiNsEvaluate (Info); 209 if (ACPI_FAILURE (Status)) 210 { 211 if (Status == AE_NOT_FOUND) 212 { 213 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[%4.4s.%s] was not found\n", 214 AcpiUtGetNodeName (PrefixNode), Path)); 215 } 216 else 217 { 218 ACPI_ERROR_METHOD ("Method execution failed", 219 PrefixNode, Path, Status); 220 } 221 222 goto Cleanup; 223 } 224 225 /* Did we get a return object? */ 226 227 if (!Info->ReturnObject) 228 { 229 if (ExpectedReturnBtypes) 230 { 231 ACPI_ERROR_METHOD ("No object was returned from", 232 PrefixNode, Path, AE_NOT_EXIST); 233 234 Status = AE_NOT_EXIST; 235 } 236 237 goto Cleanup; 238 } 239 240 /* Map the return object type to the bitmapped type */ 241 242 switch ((Info->ReturnObject)->Common.Type) 243 { 244 case ACPI_TYPE_INTEGER: 245 246 ReturnBtype = ACPI_BTYPE_INTEGER; 247 break; 248 249 case ACPI_TYPE_BUFFER: 250 251 ReturnBtype = ACPI_BTYPE_BUFFER; 252 break; 253 254 case ACPI_TYPE_STRING: 255 256 ReturnBtype = ACPI_BTYPE_STRING; 257 break; 258 259 case ACPI_TYPE_PACKAGE: 260 261 ReturnBtype = ACPI_BTYPE_PACKAGE; 262 break; 263 264 default: 265 266 ReturnBtype = 0; 267 break; 268 } 269 270 if ((AcpiGbl_EnableInterpreterSlack) && 271 (!ExpectedReturnBtypes)) 272 { 273 /* 274 * We received a return object, but one was not expected. This can 275 * happen frequently if the "implicit return" feature is enabled. 276 * Just delete the return object and return AE_OK. 277 */ 278 AcpiUtRemoveReference (Info->ReturnObject); 279 goto Cleanup; 280 } 281 282 /* Is the return object one of the expected types? */ 283 284 if (!(ExpectedReturnBtypes & ReturnBtype)) 285 { 286 ACPI_ERROR_METHOD ("Return object type is incorrect", 287 PrefixNode, Path, AE_TYPE); 288 289 ACPI_ERROR ((AE_INFO, 290 "Type returned from %s was incorrect: %s, expected Btypes: 0x%X", 291 Path, AcpiUtGetObjectTypeName (Info->ReturnObject), 292 ExpectedReturnBtypes)); 293 294 /* On error exit, we must delete the return object */ 295 296 AcpiUtRemoveReference (Info->ReturnObject); 297 Status = AE_TYPE; 298 goto Cleanup; 299 } 300 301 /* Object type is OK, return it */ 302 303 *ReturnDesc = Info->ReturnObject; 304 305 Cleanup: 306 ACPI_FREE (Info); 307 return_ACPI_STATUS (Status); 308 } 309 310 311 /******************************************************************************* 312 * 313 * FUNCTION: AcpiUtEvaluateNumericObject 314 * 315 * PARAMETERS: ObjectName - Object name to be evaluated 316 * DeviceNode - Node for the device 317 * Value - Where the value is returned 318 * 319 * RETURN: Status 320 * 321 * DESCRIPTION: Evaluates a numeric namespace object for a selected device 322 * and stores result in *Value. 323 * 324 * NOTE: Internal function, no parameter validation 325 * 326 ******************************************************************************/ 327 328 ACPI_STATUS 329 AcpiUtEvaluateNumericObject ( 330 const char *ObjectName, 331 ACPI_NAMESPACE_NODE *DeviceNode, 332 UINT64 *Value) 333 { 334 ACPI_OPERAND_OBJECT *ObjDesc; 335 ACPI_STATUS Status; 336 337 338 ACPI_FUNCTION_TRACE (UtEvaluateNumericObject); 339 340 341 Status = AcpiUtEvaluateObject (DeviceNode, ObjectName, 342 ACPI_BTYPE_INTEGER, &ObjDesc); 343 if (ACPI_FAILURE (Status)) 344 { 345 return_ACPI_STATUS (Status); 346 } 347 348 /* Get the returned Integer */ 349 350 *Value = ObjDesc->Integer.Value; 351 352 /* On exit, we must delete the return object */ 353 354 AcpiUtRemoveReference (ObjDesc); 355 return_ACPI_STATUS (Status); 356 } 357 358 359 /******************************************************************************* 360 * 361 * FUNCTION: AcpiUtExecute_STA 362 * 363 * PARAMETERS: DeviceNode - Node for the device 364 * Flags - Where the status flags are returned 365 * 366 * RETURN: Status 367 * 368 * DESCRIPTION: Executes _STA for selected device and stores results in 369 * *Flags. If _STA does not exist, then the device is assumed 370 * to be present/functional/enabled (as per the ACPI spec). 371 * 372 * NOTE: Internal function, no parameter validation 373 * 374 ******************************************************************************/ 375 376 ACPI_STATUS 377 AcpiUtExecute_STA ( 378 ACPI_NAMESPACE_NODE *DeviceNode, 379 UINT32 *Flags) 380 { 381 ACPI_OPERAND_OBJECT *ObjDesc; 382 ACPI_STATUS Status; 383 384 385 ACPI_FUNCTION_TRACE (UtExecute_STA); 386 387 388 Status = AcpiUtEvaluateObject (DeviceNode, METHOD_NAME__STA, 389 ACPI_BTYPE_INTEGER, &ObjDesc); 390 if (ACPI_FAILURE (Status)) 391 { 392 if (AE_NOT_FOUND == Status) 393 { 394 /* 395 * if _STA does not exist, then (as per the ACPI specification), 396 * the returned flags will indicate that the device is present, 397 * functional, and enabled. 398 */ 399 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 400 "_STA on %4.4s was not found, assuming device is present\n", 401 AcpiUtGetNodeName (DeviceNode))); 402 403 *Flags = ACPI_UINT32_MAX; 404 Status = AE_OK; 405 } 406 407 return_ACPI_STATUS (Status); 408 } 409 410 /* Extract the status flags */ 411 412 *Flags = (UINT32) ObjDesc->Integer.Value; 413 414 /* On exit, we must delete the return object */ 415 416 AcpiUtRemoveReference (ObjDesc); 417 return_ACPI_STATUS (Status); 418 } 419 420 421 /******************************************************************************* 422 * 423 * FUNCTION: AcpiUtExecutePowerMethods 424 * 425 * PARAMETERS: DeviceNode - Node for the device 426 * MethodNames - Array of power method names 427 * MethodCount - Number of methods to execute 428 * OutValues - Where the power method values are returned 429 * 430 * RETURN: Status, OutValues 431 * 432 * DESCRIPTION: Executes the specified power methods for the device and returns 433 * the result(s). 434 * 435 * NOTE: Internal function, no parameter validation 436 * 437 ******************************************************************************/ 438 439 ACPI_STATUS 440 AcpiUtExecutePowerMethods ( 441 ACPI_NAMESPACE_NODE *DeviceNode, 442 const char **MethodNames, 443 UINT8 MethodCount, 444 UINT8 *OutValues) 445 { 446 ACPI_OPERAND_OBJECT *ObjDesc; 447 ACPI_STATUS Status; 448 ACPI_STATUS FinalStatus = AE_NOT_FOUND; 449 UINT32 i; 450 451 452 ACPI_FUNCTION_TRACE (UtExecutePowerMethods); 453 454 455 for (i = 0; i < MethodCount; i++) 456 { 457 /* 458 * Execute the power method (_SxD or _SxW). The only allowable 459 * return type is an Integer. 460 */ 461 Status = AcpiUtEvaluateObject (DeviceNode, 462 ACPI_CAST_PTR (char, MethodNames[i]), 463 ACPI_BTYPE_INTEGER, &ObjDesc); 464 if (ACPI_SUCCESS (Status)) 465 { 466 OutValues[i] = (UINT8) ObjDesc->Integer.Value; 467 468 /* Delete the return object */ 469 470 AcpiUtRemoveReference (ObjDesc); 471 FinalStatus = AE_OK; /* At least one value is valid */ 472 continue; 473 } 474 475 OutValues[i] = ACPI_UINT8_MAX; 476 if (Status == AE_NOT_FOUND) 477 { 478 continue; /* Ignore if not found */ 479 } 480 481 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Failed %s on Device %4.4s, %s\n", 482 ACPI_CAST_PTR (char, MethodNames[i]), 483 AcpiUtGetNodeName (DeviceNode), AcpiFormatException (Status))); 484 } 485 486 return_ACPI_STATUS (FinalStatus); 487 } 488