nsinit.c revision 281075
1/****************************************************************************** 2 * 3 * Module Name: nsinit - namespace initialization 4 * 5 *****************************************************************************/ 6 7/* 8 * Copyright (C) 2000 - 2015, Intel Corp. 9 * All rights reserved. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions, and the following disclaimer, 16 * without modification. 17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 18 * substantially similar to the "NO WARRANTY" disclaimer below 19 * ("Disclaimer") and any redistribution must be conditioned upon 20 * including a substantially similar Disclaimer requirement for further 21 * binary redistribution. 22 * 3. Neither the names of the above-listed copyright holders nor the names 23 * of any contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * Alternatively, this software may be distributed under the terms of the 27 * GNU General Public License ("GPL") version 2 as published by the Free 28 * Software Foundation. 29 * 30 * NO WARRANTY 31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 41 * POSSIBILITY OF SUCH DAMAGES. 42 */ 43 44#include <contrib/dev/acpica/include/acpi.h> 45#include <contrib/dev/acpica/include/accommon.h> 46#include <contrib/dev/acpica/include/acnamesp.h> 47#include <contrib/dev/acpica/include/acdispat.h> 48#include <contrib/dev/acpica/include/acinterp.h> 49 50#define _COMPONENT ACPI_NAMESPACE 51 ACPI_MODULE_NAME ("nsinit") 52 53/* Local prototypes */ 54 55static ACPI_STATUS 56AcpiNsInitOneObject ( 57 ACPI_HANDLE ObjHandle, 58 UINT32 Level, 59 void *Context, 60 void **ReturnValue); 61 62static ACPI_STATUS 63AcpiNsInitOneDevice ( 64 ACPI_HANDLE ObjHandle, 65 UINT32 NestingLevel, 66 void *Context, 67 void **ReturnValue); 68 69static ACPI_STATUS 70AcpiNsFindIniMethods ( 71 ACPI_HANDLE ObjHandle, 72 UINT32 NestingLevel, 73 void *Context, 74 void **ReturnValue); 75 76 77/******************************************************************************* 78 * 79 * FUNCTION: AcpiNsInitializeObjects 80 * 81 * PARAMETERS: None 82 * 83 * RETURN: Status 84 * 85 * DESCRIPTION: Walk the entire namespace and perform any necessary 86 * initialization on the objects found therein 87 * 88 ******************************************************************************/ 89 90ACPI_STATUS 91AcpiNsInitializeObjects ( 92 void) 93{ 94 ACPI_STATUS Status; 95 ACPI_INIT_WALK_INFO Info; 96 97 98 ACPI_FUNCTION_TRACE (NsInitializeObjects); 99 100 101 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, 102 "**** Starting initialization of namespace objects ****\n")); 103 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, 104 "Completing Region/Field/Buffer/Package initialization:\n")); 105 106 /* Set all init info to zero */ 107 108 ACPI_MEMSET (&Info, 0, sizeof (ACPI_INIT_WALK_INFO)); 109 110 /* Walk entire namespace from the supplied root */ 111 112 Status = AcpiWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 113 ACPI_UINT32_MAX, AcpiNsInitOneObject, NULL, 114 &Info, NULL); 115 if (ACPI_FAILURE (Status)) 116 { 117 ACPI_EXCEPTION ((AE_INFO, Status, "During WalkNamespace")); 118 } 119 120 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, 121 " Initialized %u/%u Regions %u/%u Fields %u/%u " 122 "Buffers %u/%u Packages (%u nodes)\n", 123 Info.OpRegionInit, Info.OpRegionCount, 124 Info.FieldInit, Info.FieldCount, 125 Info.BufferInit, Info.BufferCount, 126 Info.PackageInit, Info.PackageCount, Info.ObjectCount)); 127 128 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, 129 "%u Control Methods found\n%u Op Regions found\n", 130 Info.MethodCount, Info.OpRegionCount)); 131 132 return_ACPI_STATUS (AE_OK); 133} 134 135 136/******************************************************************************* 137 * 138 * FUNCTION: AcpiNsInitializeDevices 139 * 140 * PARAMETERS: None 141 * 142 * RETURN: ACPI_STATUS 143 * 144 * DESCRIPTION: Walk the entire namespace and initialize all ACPI devices. 145 * This means running _INI on all present devices. 146 * 147 * Note: We install PCI config space handler on region access, 148 * not here. 149 * 150 ******************************************************************************/ 151 152ACPI_STATUS 153AcpiNsInitializeDevices ( 154 void) 155{ 156 ACPI_STATUS Status; 157 ACPI_DEVICE_WALK_INFO Info; 158 159 160 ACPI_FUNCTION_TRACE (NsInitializeDevices); 161 162 163 /* Init counters */ 164 165 Info.DeviceCount = 0; 166 Info.Num_STA = 0; 167 Info.Num_INI = 0; 168 169 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, 170 "Initializing Device/Processor/Thermal objects " 171 "and executing _INI/_STA methods:\n")); 172 173 /* Tree analysis: find all subtrees that contain _INI methods */ 174 175 Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 176 ACPI_UINT32_MAX, FALSE, AcpiNsFindIniMethods, NULL, &Info, NULL); 177 if (ACPI_FAILURE (Status)) 178 { 179 goto ErrorExit; 180 } 181 182 /* Allocate the evaluation information block */ 183 184 Info.EvaluateInfo = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO)); 185 if (!Info.EvaluateInfo) 186 { 187 Status = AE_NO_MEMORY; 188 goto ErrorExit; 189 } 190 191 /* 192 * Execute the "global" _INI method that may appear at the root. This 193 * support is provided for Windows compatibility (Vista+) and is not 194 * part of the ACPI specification. 195 */ 196 Info.EvaluateInfo->PrefixNode = AcpiGbl_RootNode; 197 Info.EvaluateInfo->RelativePathname = METHOD_NAME__INI; 198 Info.EvaluateInfo->Parameters = NULL; 199 Info.EvaluateInfo->Flags = ACPI_IGNORE_RETURN_VALUE; 200 201 Status = AcpiNsEvaluate (Info.EvaluateInfo); 202 if (ACPI_SUCCESS (Status)) 203 { 204 Info.Num_INI++; 205 } 206 207 /* Walk namespace to execute all _INIs on present devices */ 208 209 Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 210 ACPI_UINT32_MAX, FALSE, AcpiNsInitOneDevice, NULL, &Info, NULL); 211 212 /* 213 * Any _OSI requests should be completed by now. If the BIOS has 214 * requested any Windows OSI strings, we will always truncate 215 * I/O addresses to 16 bits -- for Windows compatibility. 216 */ 217 if (AcpiGbl_OsiData >= ACPI_OSI_WIN_2000) 218 { 219 AcpiGbl_TruncateIoAddresses = TRUE; 220 } 221 222 ACPI_FREE (Info.EvaluateInfo); 223 if (ACPI_FAILURE (Status)) 224 { 225 goto ErrorExit; 226 } 227 228 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, 229 " Executed %u _INI methods requiring %u _STA executions " 230 "(examined %u objects)\n", 231 Info.Num_INI, Info.Num_STA, Info.DeviceCount)); 232 233 return_ACPI_STATUS (Status); 234 235 236ErrorExit: 237 ACPI_EXCEPTION ((AE_INFO, Status, "During device initialization")); 238 return_ACPI_STATUS (Status); 239} 240 241 242/******************************************************************************* 243 * 244 * FUNCTION: AcpiNsInitOneObject 245 * 246 * PARAMETERS: ObjHandle - Node 247 * Level - Current nesting level 248 * Context - Points to a init info struct 249 * ReturnValue - Not used 250 * 251 * RETURN: Status 252 * 253 * DESCRIPTION: Callback from AcpiWalkNamespace. Invoked for every object 254 * within the namespace. 255 * 256 * Currently, the only objects that require initialization are: 257 * 1) Methods 258 * 2) Op Regions 259 * 260 ******************************************************************************/ 261 262static ACPI_STATUS 263AcpiNsInitOneObject ( 264 ACPI_HANDLE ObjHandle, 265 UINT32 Level, 266 void *Context, 267 void **ReturnValue) 268{ 269 ACPI_OBJECT_TYPE Type; 270 ACPI_STATUS Status = AE_OK; 271 ACPI_INIT_WALK_INFO *Info = (ACPI_INIT_WALK_INFO *) Context; 272 ACPI_NAMESPACE_NODE *Node = (ACPI_NAMESPACE_NODE *) ObjHandle; 273 ACPI_OPERAND_OBJECT *ObjDesc; 274 275 276 ACPI_FUNCTION_NAME (NsInitOneObject); 277 278 279 Info->ObjectCount++; 280 281 /* And even then, we are only interested in a few object types */ 282 283 Type = AcpiNsGetType (ObjHandle); 284 ObjDesc = AcpiNsGetAttachedObject (Node); 285 if (!ObjDesc) 286 { 287 return (AE_OK); 288 } 289 290 /* Increment counters for object types we are looking for */ 291 292 switch (Type) 293 { 294 case ACPI_TYPE_REGION: 295 296 Info->OpRegionCount++; 297 break; 298 299 case ACPI_TYPE_BUFFER_FIELD: 300 301 Info->FieldCount++; 302 break; 303 304 case ACPI_TYPE_LOCAL_BANK_FIELD: 305 306 Info->FieldCount++; 307 break; 308 309 case ACPI_TYPE_BUFFER: 310 311 Info->BufferCount++; 312 break; 313 314 case ACPI_TYPE_PACKAGE: 315 316 Info->PackageCount++; 317 break; 318 319 default: 320 321 /* No init required, just exit now */ 322 323 return (AE_OK); 324 } 325 326 /* If the object is already initialized, nothing else to do */ 327 328 if (ObjDesc->Common.Flags & AOPOBJ_DATA_VALID) 329 { 330 return (AE_OK); 331 } 332 333 /* Must lock the interpreter before executing AML code */ 334 335 AcpiExEnterInterpreter (); 336 337 /* 338 * Each of these types can contain executable AML code within the 339 * declaration. 340 */ 341 switch (Type) 342 { 343 case ACPI_TYPE_REGION: 344 345 Info->OpRegionInit++; 346 Status = AcpiDsGetRegionArguments (ObjDesc); 347 break; 348 349 case ACPI_TYPE_BUFFER_FIELD: 350 351 Info->FieldInit++; 352 Status = AcpiDsGetBufferFieldArguments (ObjDesc); 353 break; 354 355 case ACPI_TYPE_LOCAL_BANK_FIELD: 356 357 Info->FieldInit++; 358 Status = AcpiDsGetBankFieldArguments (ObjDesc); 359 break; 360 361 case ACPI_TYPE_BUFFER: 362 363 Info->BufferInit++; 364 Status = AcpiDsGetBufferArguments (ObjDesc); 365 break; 366 367 case ACPI_TYPE_PACKAGE: 368 369 Info->PackageInit++; 370 Status = AcpiDsGetPackageArguments (ObjDesc); 371 break; 372 373 default: 374 375 /* No other types can get here */ 376 377 break; 378 } 379 380 if (ACPI_FAILURE (Status)) 381 { 382 ACPI_EXCEPTION ((AE_INFO, Status, 383 "Could not execute arguments for [%4.4s] (%s)", 384 AcpiUtGetNodeName (Node), AcpiUtGetTypeName (Type))); 385 } 386 387 /* 388 * We ignore errors from above, and always return OK, since we don't want 389 * to abort the walk on any single error. 390 */ 391 AcpiExExitInterpreter (); 392 return (AE_OK); 393} 394 395 396/******************************************************************************* 397 * 398 * FUNCTION: AcpiNsFindIniMethods 399 * 400 * PARAMETERS: ACPI_WALK_CALLBACK 401 * 402 * RETURN: ACPI_STATUS 403 * 404 * DESCRIPTION: Called during namespace walk. Finds objects named _INI under 405 * device/processor/thermal objects, and marks the entire subtree 406 * with a SUBTREE_HAS_INI flag. This flag is used during the 407 * subsequent device initialization walk to avoid entire subtrees 408 * that do not contain an _INI. 409 * 410 ******************************************************************************/ 411 412static ACPI_STATUS 413AcpiNsFindIniMethods ( 414 ACPI_HANDLE ObjHandle, 415 UINT32 NestingLevel, 416 void *Context, 417 void **ReturnValue) 418{ 419 ACPI_DEVICE_WALK_INFO *Info = ACPI_CAST_PTR (ACPI_DEVICE_WALK_INFO, Context); 420 ACPI_NAMESPACE_NODE *Node; 421 ACPI_NAMESPACE_NODE *ParentNode; 422 423 424 /* Keep count of device/processor/thermal objects */ 425 426 Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjHandle); 427 if ((Node->Type == ACPI_TYPE_DEVICE) || 428 (Node->Type == ACPI_TYPE_PROCESSOR) || 429 (Node->Type == ACPI_TYPE_THERMAL)) 430 { 431 Info->DeviceCount++; 432 return (AE_OK); 433 } 434 435 /* We are only looking for methods named _INI */ 436 437 if (!ACPI_COMPARE_NAME (Node->Name.Ascii, METHOD_NAME__INI)) 438 { 439 return (AE_OK); 440 } 441 442 /* 443 * The only _INI methods that we care about are those that are 444 * present under Device, Processor, and Thermal objects. 445 */ 446 ParentNode = Node->Parent; 447 switch (ParentNode->Type) 448 { 449 case ACPI_TYPE_DEVICE: 450 case ACPI_TYPE_PROCESSOR: 451 case ACPI_TYPE_THERMAL: 452 453 /* Mark parent and bubble up the INI present flag to the root */ 454 455 while (ParentNode) 456 { 457 ParentNode->Flags |= ANOBJ_SUBTREE_HAS_INI; 458 ParentNode = ParentNode->Parent; 459 } 460 break; 461 462 default: 463 464 break; 465 } 466 467 return (AE_OK); 468} 469 470 471/******************************************************************************* 472 * 473 * FUNCTION: AcpiNsInitOneDevice 474 * 475 * PARAMETERS: ACPI_WALK_CALLBACK 476 * 477 * RETURN: ACPI_STATUS 478 * 479 * DESCRIPTION: This is called once per device soon after ACPI is enabled 480 * to initialize each device. It determines if the device is 481 * present, and if so, calls _INI. 482 * 483 ******************************************************************************/ 484 485static ACPI_STATUS 486AcpiNsInitOneDevice ( 487 ACPI_HANDLE ObjHandle, 488 UINT32 NestingLevel, 489 void *Context, 490 void **ReturnValue) 491{ 492 ACPI_DEVICE_WALK_INFO *WalkInfo = ACPI_CAST_PTR (ACPI_DEVICE_WALK_INFO, Context); 493 ACPI_EVALUATE_INFO *Info = WalkInfo->EvaluateInfo; 494 UINT32 Flags; 495 ACPI_STATUS Status; 496 ACPI_NAMESPACE_NODE *DeviceNode; 497 498 499 ACPI_FUNCTION_TRACE (NsInitOneDevice); 500 501 502 /* We are interested in Devices, Processors and ThermalZones only */ 503 504 DeviceNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjHandle); 505 if ((DeviceNode->Type != ACPI_TYPE_DEVICE) && 506 (DeviceNode->Type != ACPI_TYPE_PROCESSOR) && 507 (DeviceNode->Type != ACPI_TYPE_THERMAL)) 508 { 509 return_ACPI_STATUS (AE_OK); 510 } 511 512 /* 513 * Because of an earlier namespace analysis, all subtrees that contain an 514 * _INI method are tagged. 515 * 516 * If this device subtree does not contain any _INI methods, we 517 * can exit now and stop traversing this entire subtree. 518 */ 519 if (!(DeviceNode->Flags & ANOBJ_SUBTREE_HAS_INI)) 520 { 521 return_ACPI_STATUS (AE_CTRL_DEPTH); 522 } 523 524 /* 525 * Run _STA to determine if this device is present and functioning. We 526 * must know this information for two important reasons (from ACPI spec): 527 * 528 * 1) We can only run _INI if the device is present. 529 * 2) We must abort the device tree walk on this subtree if the device is 530 * not present and is not functional (we will not examine the children) 531 * 532 * The _STA method is not required to be present under the device, we 533 * assume the device is present if _STA does not exist. 534 */ 535 ACPI_DEBUG_EXEC (AcpiUtDisplayInitPathname ( 536 ACPI_TYPE_METHOD, DeviceNode, METHOD_NAME__STA)); 537 538 Status = AcpiUtExecute_STA (DeviceNode, &Flags); 539 if (ACPI_FAILURE (Status)) 540 { 541 /* Ignore error and move on to next device */ 542 543 return_ACPI_STATUS (AE_OK); 544 } 545 546 /* 547 * Flags == -1 means that _STA was not found. In this case, we assume that 548 * the device is both present and functional. 549 * 550 * From the ACPI spec, description of _STA: 551 * 552 * "If a device object (including the processor object) does not have an 553 * _STA object, then OSPM assumes that all of the above bits are set (in 554 * other words, the device is present, ..., and functioning)" 555 */ 556 if (Flags != ACPI_UINT32_MAX) 557 { 558 WalkInfo->Num_STA++; 559 } 560 561 /* 562 * Examine the PRESENT and FUNCTIONING status bits 563 * 564 * Note: ACPI spec does not seem to specify behavior for the present but 565 * not functioning case, so we assume functioning if present. 566 */ 567 if (!(Flags & ACPI_STA_DEVICE_PRESENT)) 568 { 569 /* Device is not present, we must examine the Functioning bit */ 570 571 if (Flags & ACPI_STA_DEVICE_FUNCTIONING) 572 { 573 /* 574 * Device is not present but is "functioning". In this case, 575 * we will not run _INI, but we continue to examine the children 576 * of this device. 577 * 578 * From the ACPI spec, description of _STA: (Note - no mention 579 * of whether to run _INI or not on the device in question) 580 * 581 * "_STA may return bit 0 clear (not present) with bit 3 set 582 * (device is functional). This case is used to indicate a valid 583 * device for which no device driver should be loaded (for example, 584 * a bridge device.) Children of this device may be present and 585 * valid. OSPM should continue enumeration below a device whose 586 * _STA returns this bit combination" 587 */ 588 return_ACPI_STATUS (AE_OK); 589 } 590 else 591 { 592 /* 593 * Device is not present and is not functioning. We must abort the 594 * walk of this subtree immediately -- don't look at the children 595 * of such a device. 596 * 597 * From the ACPI spec, description of _INI: 598 * 599 * "If the _STA method indicates that the device is not present, 600 * OSPM will not run the _INI and will not examine the children 601 * of the device for _INI methods" 602 */ 603 return_ACPI_STATUS (AE_CTRL_DEPTH); 604 } 605 } 606 607 /* 608 * The device is present or is assumed present if no _STA exists. 609 * Run the _INI if it exists (not required to exist) 610 * 611 * Note: We know there is an _INI within this subtree, but it may not be 612 * under this particular device, it may be lower in the branch. 613 */ 614 ACPI_DEBUG_EXEC (AcpiUtDisplayInitPathname ( 615 ACPI_TYPE_METHOD, DeviceNode, METHOD_NAME__INI)); 616 617 ACPI_MEMSET (Info, 0, sizeof (ACPI_EVALUATE_INFO)); 618 Info->PrefixNode = DeviceNode; 619 Info->RelativePathname = METHOD_NAME__INI; 620 Info->Parameters = NULL; 621 Info->Flags = ACPI_IGNORE_RETURN_VALUE; 622 623 Status = AcpiNsEvaluate (Info); 624 if (ACPI_SUCCESS (Status)) 625 { 626 WalkInfo->Num_INI++; 627 } 628 629#ifdef ACPI_DEBUG_OUTPUT 630 else if (Status != AE_NOT_FOUND) 631 { 632 /* Ignore error and move on to next device */ 633 634 char *ScopeName = AcpiNsGetExternalPathname (Info->Node); 635 636 ACPI_EXCEPTION ((AE_INFO, Status, "during %s._INI execution", 637 ScopeName)); 638 ACPI_FREE (ScopeName); 639 } 640#endif 641 642 /* Ignore errors from above */ 643 644 Status = AE_OK; 645 646 /* 647 * The _INI method has been run if present; call the Global Initialization 648 * Handler for this device. 649 */ 650 if (AcpiGbl_InitHandler) 651 { 652 Status = AcpiGbl_InitHandler (DeviceNode, ACPI_INIT_DEVICE_INI); 653 } 654 655 return_ACPI_STATUS (Status); 656} 657