nsxfname.c revision 83174
1219820Sjeff/****************************************************************************** 2219820Sjeff * 3219820Sjeff * Module Name: nsxfname - Public interfaces to the ACPI subsystem 4219820Sjeff * ACPI Namespace oriented interfaces 5219820Sjeff * $Revision: 80 $ 6219820Sjeff * 7219820Sjeff *****************************************************************************/ 8219820Sjeff 9219820Sjeff/****************************************************************************** 10219820Sjeff * 11219820Sjeff * 1. Copyright Notice 12219820Sjeff * 13219820Sjeff * Some or all of this work - Copyright (c) 1999, 2000, 2001, Intel Corp. 14219820Sjeff * All rights reserved. 15219820Sjeff * 16219820Sjeff * 2. License 17219820Sjeff * 18219820Sjeff * 2.1. This is your license from Intel Corp. under its intellectual property 19219820Sjeff * rights. You may have additional license terms from the party that provided 20219820Sjeff * you this software, covering your right to use that party's intellectual 21219820Sjeff * property rights. 22219820Sjeff * 23219820Sjeff * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 24219820Sjeff * copy of the source code appearing in this file ("Covered Code") an 25219820Sjeff * irrevocable, perpetual, worldwide license under Intel's copyrights in the 26219820Sjeff * base code distributed originally by Intel ("Original Intel Code") to copy, 27219820Sjeff * make derivatives, distribute, use and display any portion of the Covered 28219820Sjeff * Code in any form, with the right to sublicense such rights; and 29219820Sjeff * 30219820Sjeff * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 31219820Sjeff * license (with the right to sublicense), under only those claims of Intel 32219820Sjeff * patents that are infringed by the Original Intel Code, to make, use, sell, 33219820Sjeff * offer to sell, and import the Covered Code and derivative works thereof 34219820Sjeff * solely to the minimum extent necessary to exercise the above copyright 35219820Sjeff * license, and in no event shall the patent license extend to any additions 36219820Sjeff * to or modifications of the Original Intel Code. No other license or right 37219820Sjeff * is granted directly or by implication, estoppel or otherwise; 38219820Sjeff * 39219820Sjeff * The above copyright and patent license is granted only if the following 40219820Sjeff * conditions are met: 41219820Sjeff * 42219820Sjeff * 3. Conditions 43219820Sjeff * 44219820Sjeff * 3.1. Redistribution of Source with Rights to Further Distribute Source. 45219820Sjeff * Redistribution of source code of any substantial portion of the Covered 46219820Sjeff * Code or modification with rights to further distribute source must include 47219820Sjeff * the above Copyright Notice, the above License, this list of Conditions, 48219820Sjeff * and the following Disclaimer and Export Compliance provision. In addition, 49219820Sjeff * Licensee must cause all Covered Code to which Licensee contributes to 50219820Sjeff * contain a file documenting the changes Licensee made to create that Covered 51219820Sjeff * Code and the date of any change. Licensee must include in that file the 52219820Sjeff * documentation of any changes made by any predecessor Licensee. Licensee 53219820Sjeff * must include a prominent statement that the modification is derived, 54219820Sjeff * directly or indirectly, from Original Intel Code. 55219820Sjeff * 56219820Sjeff * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 57219820Sjeff * Redistribution of source code of any substantial portion of the Covered 58219820Sjeff * Code or modification without rights to further distribute source must 59219820Sjeff * include the following Disclaimer and Export Compliance provision in the 60219820Sjeff * documentation and/or other materials provided with distribution. In 61219820Sjeff * addition, Licensee may not authorize further sublicense of source of any 62219820Sjeff * portion of the Covered Code, and must include terms to the effect that the 63219820Sjeff * license from Licensee to its licensee is limited to the intellectual 64219820Sjeff * property embodied in the software Licensee provides to its licensee, and 65219820Sjeff * not to intellectual property embodied in modifications its licensee may 66219820Sjeff * make. 67219820Sjeff * 68219820Sjeff * 3.3. Redistribution of Executable. Redistribution in executable form of any 69219820Sjeff * substantial portion of the Covered Code or modification must reproduce the 70219820Sjeff * above Copyright Notice, and the following Disclaimer and Export Compliance 71219820Sjeff * provision in the documentation and/or other materials provided with the 72219820Sjeff * distribution. 73219820Sjeff * 74219820Sjeff * 3.4. Intel retains all right, title, and interest in and to the Original 75219820Sjeff * Intel Code. 76219820Sjeff * 77219820Sjeff * 3.5. Neither the name Intel nor any other trademark owned or controlled by 78219820Sjeff * Intel shall be used in advertising or otherwise to promote the sale, use or 79219820Sjeff * other dealings in products derived from or relating to the Covered Code 80219820Sjeff * without prior written authorization from Intel. 81219820Sjeff * 82219820Sjeff * 4. Disclaimer and Export Compliance 83219820Sjeff * 84219820Sjeff * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 85219820Sjeff * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 86219820Sjeff * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 87219820Sjeff * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 88219820Sjeff * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 89219820Sjeff * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 90219820Sjeff * PARTICULAR PURPOSE. 91219820Sjeff * 92219820Sjeff * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 93219820Sjeff * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 94219820Sjeff * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 95219820Sjeff * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 96219820Sjeff * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 97219820Sjeff * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 98219820Sjeff * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 99219820Sjeff * LIMITED REMEDY. 100219820Sjeff * 101219820Sjeff * 4.3. Licensee shall not export, either directly or indirectly, any of this 102219820Sjeff * software or system incorporating such software without first obtaining any 103219820Sjeff * required license or other approval from the U. S. Department of Commerce or 104219820Sjeff * any other agency or department of the United States Government. In the 105219820Sjeff * event Licensee exports any such software from the United States or 106219820Sjeff * re-exports any such software from a foreign destination, Licensee shall 107219820Sjeff * ensure that the distribution and export/re-export of the software is in 108219820Sjeff * compliance with all laws, regulations, orders, or other restrictions of the 109219820Sjeff * U.S. Export Administration Regulations. Licensee agrees that neither it nor 110219820Sjeff * any of its subsidiaries will export/re-export any technical data, process, 111219820Sjeff * software, or service, directly or indirectly, to any country for which the 112219820Sjeff * United States government or any agency thereof requires an export license, 113219820Sjeff * other governmental approval, or letter of assurance, without first obtaining 114219820Sjeff * such license, approval or letter. 115219820Sjeff * 116219820Sjeff *****************************************************************************/ 117219820Sjeff 118219820Sjeff#define __NSXFNAME_C__ 119219820Sjeff 120219820Sjeff#include "acpi.h" 121219820Sjeff#include "acinterp.h" 122219820Sjeff#include "acnamesp.h" 123219820Sjeff#include "amlcode.h" 124219820Sjeff#include "acparser.h" 125219820Sjeff#include "acdispat.h" 126219820Sjeff#include "acevents.h" 127219820Sjeff 128219820Sjeff 129219820Sjeff#define _COMPONENT ACPI_NAMESPACE 130219820Sjeff MODULE_NAME ("nsxfname") 131219820Sjeff 132219820Sjeff 133219820Sjeff/**************************************************************************** 134219820Sjeff * 135219820Sjeff * FUNCTION: AcpiGetHandle 136219820Sjeff * 137219820Sjeff * PARAMETERS: Parent - Object to search under (search scope). 138219820Sjeff * PathName - Pointer to an asciiz string containing the 139219820Sjeff * name 140219820Sjeff * RetHandle - Where the return handle is placed 141219820Sjeff * 142219820Sjeff * RETURN: Status 143219820Sjeff * 144219820Sjeff * DESCRIPTION: This routine will search for a caller specified name in the 145219820Sjeff * name space. The caller can restrict the search region by 146219820Sjeff * specifying a non NULL parent. The parent value is itself a 147219820Sjeff * namespace handle. 148219820Sjeff * 149219820Sjeff ******************************************************************************/ 150219820Sjeff 151219820SjeffACPI_STATUS 152219820SjeffAcpiGetHandle ( 153219820Sjeff ACPI_HANDLE Parent, 154219820Sjeff ACPI_STRING Pathname, 155219820Sjeff ACPI_HANDLE *RetHandle) 156219820Sjeff{ 157219820Sjeff ACPI_STATUS Status; 158219820Sjeff ACPI_NAMESPACE_NODE *Node = NULL; 159219820Sjeff ACPI_NAMESPACE_NODE *PrefixNode = NULL; 160219820Sjeff 161219820Sjeff 162219820Sjeff FUNCTION_ENTRY (); 163219820Sjeff 164219820Sjeff 165219820Sjeff /* Ensure that ACPI has been initialized */ 166219820Sjeff 167219820Sjeff ACPI_IS_INITIALIZATION_COMPLETE (Status); 168219820Sjeff if (ACPI_FAILURE (Status)) 169219820Sjeff { 170219820Sjeff return (Status); 171219820Sjeff } 172219820Sjeff 173219820Sjeff /* Parameter Validation */ 174219820Sjeff 175219820Sjeff if (!RetHandle || !Pathname) 176219820Sjeff { 177219820Sjeff return (AE_BAD_PARAMETER); 178219820Sjeff } 179219820Sjeff 180219820Sjeff /* Convert a parent handle to a prefix node */ 181219820Sjeff 182219820Sjeff if (Parent) 183219820Sjeff { 184219820Sjeff AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); 185219820Sjeff 186219820Sjeff PrefixNode = AcpiNsConvertHandleToEntry (Parent); 187219820Sjeff if (!PrefixNode) 188219820Sjeff { 189219820Sjeff AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 190219820Sjeff return (AE_BAD_PARAMETER); 191219820Sjeff } 192219820Sjeff 193219820Sjeff AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 194219820Sjeff } 195219820Sjeff 196219820Sjeff /* Special case for root, since we can't search for it */ 197219820Sjeff 198219820Sjeff if (STRCMP (Pathname, NS_ROOT_PATH) == 0) 199219820Sjeff { 200219820Sjeff *RetHandle = AcpiNsConvertEntryToHandle (AcpiGbl_RootNode); 201219820Sjeff return (AE_OK); 202219820Sjeff } 203 204 /* 205 * Find the Node and convert to a handle 206 */ 207 Status = AcpiNsGetNode (Pathname, PrefixNode, &Node); 208 209 *RetHandle = NULL; 210 if (ACPI_SUCCESS (Status)) 211 { 212 *RetHandle = AcpiNsConvertEntryToHandle (Node); 213 } 214 215 return (Status); 216} 217 218 219/**************************************************************************** 220 * 221 * FUNCTION: AcpiGetName 222 * 223 * PARAMETERS: Handle - Handle to be converted to a pathname 224 * NameType - Full pathname or single segment 225 * RetPathPtr - Buffer for returned path 226 * 227 * RETURN: Pointer to a string containing the fully qualified Name. 228 * 229 * DESCRIPTION: This routine returns the fully qualified name associated with 230 * the Handle parameter. This and the AcpiPathnameToHandle are 231 * complementary functions. 232 * 233 ******************************************************************************/ 234 235ACPI_STATUS 236AcpiGetName ( 237 ACPI_HANDLE Handle, 238 UINT32 NameType, 239 ACPI_BUFFER *RetPathPtr) 240{ 241 ACPI_STATUS Status; 242 ACPI_NAMESPACE_NODE *Node; 243 244 245 /* Ensure that ACPI has been initialized */ 246 247 ACPI_IS_INITIALIZATION_COMPLETE (Status); 248 if (ACPI_FAILURE (Status)) 249 { 250 return (Status); 251 } 252 253 /* Buffer pointer must be valid always */ 254 255 if (!RetPathPtr || (NameType > ACPI_NAME_TYPE_MAX)) 256 { 257 return (AE_BAD_PARAMETER); 258 } 259 260 /* Allow length to be zero and ignore the pointer */ 261 262 if ((RetPathPtr->Length) && 263 (!RetPathPtr->Pointer)) 264 { 265 return (AE_BAD_PARAMETER); 266 } 267 268 if (NameType == ACPI_FULL_PATHNAME) 269 { 270 /* Get the full pathname (From the namespace root) */ 271 272 Status = AcpiNsHandleToPathname (Handle, &RetPathPtr->Length, 273 RetPathPtr->Pointer); 274 return (Status); 275 } 276 277 /* 278 * Wants the single segment ACPI name. 279 * Validate handle and convert to an Node 280 */ 281 AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); 282 Node = AcpiNsConvertHandleToEntry (Handle); 283 if (!Node) 284 { 285 Status = AE_BAD_PARAMETER; 286 goto UnlockAndExit; 287 } 288 289 /* Check if name will fit in buffer */ 290 291 if (RetPathPtr->Length < PATH_SEGMENT_LENGTH) 292 { 293 RetPathPtr->Length = PATH_SEGMENT_LENGTH; 294 Status = AE_BUFFER_OVERFLOW; 295 goto UnlockAndExit; 296 } 297 298 /* Just copy the ACPI name from the Node and zero terminate it */ 299 300 STRNCPY (RetPathPtr->Pointer, (NATIVE_CHAR *) &Node->Name, 301 ACPI_NAME_SIZE); 302 ((NATIVE_CHAR *) RetPathPtr->Pointer) [ACPI_NAME_SIZE] = 0; 303 Status = AE_OK; 304 305 306UnlockAndExit: 307 308 AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 309 return (Status); 310} 311 312 313/**************************************************************************** 314 * 315 * FUNCTION: AcpiGetObjectInfo 316 * 317 * PARAMETERS: Handle - Object Handle 318 * Info - Where the info is returned 319 * 320 * RETURN: Status 321 * 322 * DESCRIPTION: Returns information about an object as gleaned from the 323 * namespace node and possibly by running several standard 324 * control methods (Such as in the case of a device.) 325 * 326 ******************************************************************************/ 327 328ACPI_STATUS 329AcpiGetObjectInfo ( 330 ACPI_HANDLE Handle, 331 ACPI_DEVICE_INFO *Info) 332{ 333 ACPI_DEVICE_ID Hid; 334 ACPI_DEVICE_ID Uid; 335 ACPI_STATUS Status; 336 UINT32 DeviceStatus = 0; 337 ACPI_INTEGER Address = 0; 338 ACPI_NAMESPACE_NODE *Node; 339 340 341 /* Ensure that ACPI has been initialized */ 342 343 ACPI_IS_INITIALIZATION_COMPLETE (Status); 344 if (ACPI_FAILURE (Status)) 345 { 346 return (Status); 347 } 348 349 /* Parameter validation */ 350 351 if (!Handle || !Info) 352 { 353 return (AE_BAD_PARAMETER); 354 } 355 356 AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); 357 358 Node = AcpiNsConvertHandleToEntry (Handle); 359 if (!Node) 360 { 361 AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 362 return (AE_BAD_PARAMETER); 363 } 364 365 Info->Type = Node->Type; 366 Info->Name = Node->Name; 367 368 AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); 369 370 /* 371 * If not a device, we are all done. 372 */ 373 if (Info->Type != ACPI_TYPE_DEVICE) 374 { 375 return (AE_OK); 376 } 377 378 379 /* 380 * Get extra info for ACPI devices only. Run the 381 * _HID, _UID, _STA, and _ADR methods. Note: none 382 * of these methods are required, so they may or may 383 * not be present. The Info->Valid bits are used 384 * to indicate which methods ran successfully. 385 */ 386 Info->Valid = 0; 387 388 /* Execute the _HID method and save the result */ 389 390 Status = AcpiUtExecute_HID (Node, &Hid); 391 if (ACPI_SUCCESS (Status)) 392 { 393 STRNCPY (Info->HardwareId, Hid.Buffer, sizeof(Info->HardwareId)); 394 395 Info->Valid |= ACPI_VALID_HID; 396 } 397 398 /* Execute the _UID method and save the result */ 399 400 Status = AcpiUtExecute_UID (Node, &Uid); 401 if (ACPI_SUCCESS (Status)) 402 { 403 STRCPY (Info->UniqueId, Uid.Buffer); 404 405 Info->Valid |= ACPI_VALID_UID; 406 } 407 408 /* 409 * Execute the _STA method and save the result 410 * _STA is not always present 411 */ 412 Status = AcpiUtExecute_STA (Node, &DeviceStatus); 413 if (ACPI_SUCCESS (Status)) 414 { 415 Info->CurrentStatus = DeviceStatus; 416 Info->Valid |= ACPI_VALID_STA; 417 } 418 419 /* 420 * Execute the _ADR method and save result if successful 421 * _ADR is not always present 422 */ 423 Status = AcpiUtEvaluateNumericObject (METHOD_NAME__ADR, 424 Node, &Address); 425 426 if (ACPI_SUCCESS (Status)) 427 { 428 Info->Address = Address; 429 Info->Valid |= ACPI_VALID_ADR; 430 } 431 432 return (AE_OK); 433} 434 435