| 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Module Name: evrgnini- ACPI AddressSpace (OpRegion) init |
| 4 | * |
| 5 | *****************************************************************************/ |
| 6 | |
| 7 | /* |
| 8 | * Copyright (C) 2000 - 2016, 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 "acpi.h" |
| 45 | #include "accommon.h" |
| 46 | #include "acevents.h" |
| 47 | #include "acnamesp.h" |
| 48 | |
| 49 | #define _COMPONENT ACPI_EVENTS |
| 50 | ACPI_MODULE_NAME ("evrgnini" ) |
| 51 | |
| 52 | /* Local prototypes */ |
| 53 | |
| 54 | static BOOLEAN |
| 55 | AcpiEvIsPciRootBridge ( |
| 56 | ACPI_NAMESPACE_NODE *Node); |
| 57 | |
| 58 | |
| 59 | /******************************************************************************* |
| 60 | * |
| 61 | * FUNCTION: AcpiEvSystemMemoryRegionSetup |
| 62 | * |
| 63 | * PARAMETERS: Handle - Region we are interested in |
| 64 | * Function - Start or stop |
| 65 | * HandlerContext - Address space handler context |
| 66 | * RegionContext - Region specific context |
| 67 | * |
| 68 | * RETURN: Status |
| 69 | * |
| 70 | * DESCRIPTION: Setup a SystemMemory operation region |
| 71 | * |
| 72 | ******************************************************************************/ |
| 73 | |
| 74 | ACPI_STATUS |
| 75 | AcpiEvSystemMemoryRegionSetup ( |
| 76 | ACPI_HANDLE Handle, |
| 77 | UINT32 Function, |
| 78 | void *HandlerContext, |
| 79 | void **RegionContext) |
| 80 | { |
| 81 | ACPI_OPERAND_OBJECT *RegionDesc = (ACPI_OPERAND_OBJECT *) Handle; |
| 82 | ACPI_MEM_SPACE_CONTEXT *LocalRegionContext; |
| 83 | |
| 84 | |
| 85 | ACPI_FUNCTION_TRACE (EvSystemMemoryRegionSetup); |
| 86 | |
| 87 | |
| 88 | if (Function == ACPI_REGION_DEACTIVATE) |
| 89 | { |
| 90 | if (*RegionContext) |
| 91 | { |
| 92 | LocalRegionContext = (ACPI_MEM_SPACE_CONTEXT *) *RegionContext; |
| 93 | |
| 94 | /* Delete a cached mapping if present */ |
| 95 | |
| 96 | if (LocalRegionContext->MappedLength) |
| 97 | { |
| 98 | AcpiOsUnmapMemory (LocalRegionContext->MappedLogicalAddress, |
| 99 | LocalRegionContext->MappedLength); |
| 100 | } |
| 101 | ACPI_FREE (LocalRegionContext); |
| 102 | *RegionContext = NULL; |
| 103 | } |
| 104 | return_ACPI_STATUS (AE_OK); |
| 105 | } |
| 106 | |
| 107 | /* Create a new context */ |
| 108 | |
| 109 | LocalRegionContext = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_MEM_SPACE_CONTEXT)); |
| 110 | if (!(LocalRegionContext)) |
| 111 | { |
| 112 | return_ACPI_STATUS (AE_NO_MEMORY); |
| 113 | } |
| 114 | |
| 115 | /* Save the region length and address for use in the handler */ |
| 116 | |
| 117 | LocalRegionContext->Length = RegionDesc->Region.Length; |
| 118 | LocalRegionContext->Address = RegionDesc->Region.Address; |
| 119 | |
| 120 | *RegionContext = LocalRegionContext; |
| 121 | return_ACPI_STATUS (AE_OK); |
| 122 | } |
| 123 | |
| 124 | |
| 125 | /******************************************************************************* |
| 126 | * |
| 127 | * FUNCTION: AcpiEvIoSpaceRegionSetup |
| 128 | * |
| 129 | * PARAMETERS: Handle - Region we are interested in |
| 130 | * Function - Start or stop |
| 131 | * HandlerContext - Address space handler context |
| 132 | * RegionContext - Region specific context |
| 133 | * |
| 134 | * RETURN: Status |
| 135 | * |
| 136 | * DESCRIPTION: Setup a IO operation region |
| 137 | * |
| 138 | ******************************************************************************/ |
| 139 | |
| 140 | ACPI_STATUS |
| 141 | AcpiEvIoSpaceRegionSetup ( |
| 142 | ACPI_HANDLE Handle, |
| 143 | UINT32 Function, |
| 144 | void *HandlerContext, |
| 145 | void **RegionContext) |
| 146 | { |
| 147 | ACPI_FUNCTION_TRACE (EvIoSpaceRegionSetup); |
| 148 | |
| 149 | |
| 150 | if (Function == ACPI_REGION_DEACTIVATE) |
| 151 | { |
| 152 | *RegionContext = NULL; |
| 153 | } |
| 154 | else |
| 155 | { |
| 156 | *RegionContext = HandlerContext; |
| 157 | } |
| 158 | |
| 159 | return_ACPI_STATUS (AE_OK); |
| 160 | } |
| 161 | |
| 162 | |
| 163 | /******************************************************************************* |
| 164 | * |
| 165 | * FUNCTION: AcpiEvPciConfigRegionSetup |
| 166 | * |
| 167 | * PARAMETERS: Handle - Region we are interested in |
| 168 | * Function - Start or stop |
| 169 | * HandlerContext - Address space handler context |
| 170 | * RegionContext - Region specific context |
| 171 | * |
| 172 | * RETURN: Status |
| 173 | * |
| 174 | * DESCRIPTION: Setup a PCI_Config operation region |
| 175 | * |
| 176 | * MUTEX: Assumes namespace is not locked |
| 177 | * |
| 178 | ******************************************************************************/ |
| 179 | |
| 180 | ACPI_STATUS |
| 181 | AcpiEvPciConfigRegionSetup ( |
| 182 | ACPI_HANDLE Handle, |
| 183 | UINT32 Function, |
| 184 | void *HandlerContext, |
| 185 | void **RegionContext) |
| 186 | { |
| 187 | ACPI_STATUS Status = AE_OK; |
| 188 | UINT64 PciValue; |
| 189 | ACPI_PCI_ID *PciId = *RegionContext; |
| 190 | ACPI_OPERAND_OBJECT *HandlerObj; |
| 191 | ACPI_NAMESPACE_NODE *ParentNode; |
| 192 | ACPI_NAMESPACE_NODE *PciRootNode; |
| 193 | ACPI_NAMESPACE_NODE *PciDeviceNode; |
| 194 | ACPI_OPERAND_OBJECT *RegionObj = (ACPI_OPERAND_OBJECT *) Handle; |
| 195 | |
| 196 | |
| 197 | ACPI_FUNCTION_TRACE (EvPciConfigRegionSetup); |
| 198 | |
| 199 | |
| 200 | HandlerObj = RegionObj->Region.Handler; |
| 201 | if (!HandlerObj) |
| 202 | { |
| 203 | /* |
| 204 | * No installed handler. This shouldn't happen because the dispatch |
| 205 | * routine checks before we get here, but we check again just in case. |
| 206 | */ |
| 207 | ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, |
| 208 | "Attempting to init a region %p, with no handler\n" , RegionObj)); |
| 209 | return_ACPI_STATUS (AE_NOT_EXIST); |
| 210 | } |
| 211 | |
| 212 | *RegionContext = NULL; |
| 213 | if (Function == ACPI_REGION_DEACTIVATE) |
| 214 | { |
| 215 | if (PciId) |
| 216 | { |
| 217 | ACPI_FREE (PciId); |
| 218 | } |
| 219 | return_ACPI_STATUS (Status); |
| 220 | } |
| 221 | |
| 222 | ParentNode = RegionObj->Region.Node->Parent; |
| 223 | |
| 224 | /* |
| 225 | * Get the _SEG and _BBN values from the device upon which the handler |
| 226 | * is installed. |
| 227 | * |
| 228 | * We need to get the _SEG and _BBN objects relative to the PCI BUS device. |
| 229 | * This is the device the handler has been registered to handle. |
| 230 | */ |
| 231 | |
| 232 | /* |
| 233 | * If the AddressSpace.Node is still pointing to the root, we need |
| 234 | * to scan upward for a PCI Root bridge and re-associate the OpRegion |
| 235 | * handlers with that device. |
| 236 | */ |
| 237 | if (HandlerObj->AddressSpace.Node == AcpiGbl_RootNode) |
| 238 | { |
| 239 | /* Start search from the parent object */ |
| 240 | |
| 241 | PciRootNode = ParentNode; |
| 242 | while (PciRootNode != AcpiGbl_RootNode) |
| 243 | { |
| 244 | /* Get the _HID/_CID in order to detect a RootBridge */ |
| 245 | |
| 246 | if (AcpiEvIsPciRootBridge (PciRootNode)) |
| 247 | { |
| 248 | /* Install a handler for this PCI root bridge */ |
| 249 | |
| 250 | Status = AcpiInstallAddressSpaceHandler ( |
| 251 | (ACPI_HANDLE) PciRootNode, |
| 252 | ACPI_ADR_SPACE_PCI_CONFIG, |
| 253 | ACPI_DEFAULT_HANDLER, NULL, NULL); |
| 254 | if (ACPI_FAILURE (Status)) |
| 255 | { |
| 256 | if (Status == AE_SAME_HANDLER) |
| 257 | { |
| 258 | /* |
| 259 | * It is OK if the handler is already installed on the |
| 260 | * root bridge. Still need to return a context object |
| 261 | * for the new PCI_Config operation region, however. |
| 262 | */ |
| 263 | Status = AE_OK; |
| 264 | } |
| 265 | else |
| 266 | { |
| 267 | ACPI_EXCEPTION ((AE_INFO, Status, |
| 268 | "Could not install PciConfig handler " |
| 269 | "for Root Bridge %4.4s" , |
| 270 | AcpiUtGetNodeName (PciRootNode))); |
| 271 | } |
| 272 | } |
| 273 | break; |
| 274 | } |
| 275 | |
| 276 | PciRootNode = PciRootNode->Parent; |
| 277 | } |
| 278 | |
| 279 | /* PCI root bridge not found, use namespace root node */ |
| 280 | } |
| 281 | else |
| 282 | { |
| 283 | PciRootNode = HandlerObj->AddressSpace.Node; |
| 284 | } |
| 285 | |
| 286 | /* |
| 287 | * If this region is now initialized, we are done. |
| 288 | * (InstallAddressSpaceHandler could have initialized it) |
| 289 | */ |
| 290 | if (RegionObj->Region.Flags & AOPOBJ_SETUP_COMPLETE) |
| 291 | { |
| 292 | return_ACPI_STATUS (AE_OK); |
| 293 | } |
| 294 | |
| 295 | /* Region is still not initialized. Create a new context */ |
| 296 | |
| 297 | PciId = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_PCI_ID)); |
| 298 | if (!PciId) |
| 299 | { |
| 300 | return_ACPI_STATUS (AE_NO_MEMORY); |
| 301 | } |
| 302 | |
| 303 | /* |
| 304 | * For PCI_Config space access, we need the segment, bus, device and |
| 305 | * function numbers. Acquire them here. |
| 306 | * |
| 307 | * Find the parent device object. (This allows the operation region to be |
| 308 | * within a subscope under the device, such as a control method.) |
| 309 | */ |
| 310 | PciDeviceNode = RegionObj->Region.Node; |
| 311 | while (PciDeviceNode && (PciDeviceNode->Type != ACPI_TYPE_DEVICE)) |
| 312 | { |
| 313 | PciDeviceNode = PciDeviceNode->Parent; |
| 314 | } |
| 315 | |
| 316 | if (!PciDeviceNode) |
| 317 | { |
| 318 | ACPI_FREE (PciId); |
| 319 | return_ACPI_STATUS (AE_AML_OPERAND_TYPE); |
| 320 | } |
| 321 | |
| 322 | /* |
| 323 | * Get the PCI device and function numbers from the _ADR object |
| 324 | * contained in the parent's scope. |
| 325 | */ |
| 326 | Status = AcpiUtEvaluateNumericObject (METHOD_NAME__ADR, |
| 327 | PciDeviceNode, &PciValue); |
| 328 | |
| 329 | /* |
| 330 | * The default is zero, and since the allocation above zeroed the data, |
| 331 | * just do nothing on failure. |
| 332 | */ |
| 333 | if (ACPI_SUCCESS (Status)) |
| 334 | { |
| 335 | PciId->Device = ACPI_HIWORD (ACPI_LODWORD (PciValue)); |
| 336 | PciId->Function = ACPI_LOWORD (ACPI_LODWORD (PciValue)); |
| 337 | } |
| 338 | |
| 339 | /* The PCI segment number comes from the _SEG method */ |
| 340 | |
| 341 | Status = AcpiUtEvaluateNumericObject (METHOD_NAME__SEG, |
| 342 | PciRootNode, &PciValue); |
| 343 | if (ACPI_SUCCESS (Status)) |
| 344 | { |
| 345 | PciId->Segment = ACPI_LOWORD (PciValue); |
| 346 | } |
| 347 | |
| 348 | /* The PCI bus number comes from the _BBN method */ |
| 349 | |
| 350 | Status = AcpiUtEvaluateNumericObject (METHOD_NAME__BBN, |
| 351 | PciRootNode, &PciValue); |
| 352 | if (ACPI_SUCCESS (Status)) |
| 353 | { |
| 354 | PciId->Bus = ACPI_LOWORD (PciValue); |
| 355 | } |
| 356 | |
| 357 | /* Complete/update the PCI ID for this device */ |
| 358 | |
| 359 | Status = AcpiHwDerivePciId (PciId, PciRootNode, RegionObj->Region.Node); |
| 360 | if (ACPI_FAILURE (Status)) |
| 361 | { |
| 362 | ACPI_FREE (PciId); |
| 363 | return_ACPI_STATUS (Status); |
| 364 | } |
| 365 | |
| 366 | *RegionContext = PciId; |
| 367 | return_ACPI_STATUS (AE_OK); |
| 368 | } |
| 369 | |
| 370 | |
| 371 | /******************************************************************************* |
| 372 | * |
| 373 | * FUNCTION: AcpiEvIsPciRootBridge |
| 374 | * |
| 375 | * PARAMETERS: Node - Device node being examined |
| 376 | * |
| 377 | * RETURN: TRUE if device is a PCI/PCI-Express Root Bridge |
| 378 | * |
| 379 | * DESCRIPTION: Determine if the input device represents a PCI Root Bridge by |
| 380 | * examining the _HID and _CID for the device. |
| 381 | * |
| 382 | ******************************************************************************/ |
| 383 | |
| 384 | static BOOLEAN |
| 385 | AcpiEvIsPciRootBridge ( |
| 386 | ACPI_NAMESPACE_NODE *Node) |
| 387 | { |
| 388 | ACPI_STATUS Status; |
| 389 | ACPI_PNP_DEVICE_ID *Hid; |
| 390 | ACPI_PNP_DEVICE_ID_LIST *Cid; |
| 391 | UINT32 i; |
| 392 | BOOLEAN Match; |
| 393 | |
| 394 | |
| 395 | /* Get the _HID and check for a PCI Root Bridge */ |
| 396 | |
| 397 | Status = AcpiUtExecute_HID (Node, &Hid); |
| 398 | if (ACPI_FAILURE (Status)) |
| 399 | { |
| 400 | return (FALSE); |
| 401 | } |
| 402 | |
| 403 | Match = AcpiUtIsPciRootBridge (Hid->String); |
| 404 | ACPI_FREE (Hid); |
| 405 | |
| 406 | if (Match) |
| 407 | { |
| 408 | return (TRUE); |
| 409 | } |
| 410 | |
| 411 | /* The _HID did not match. Get the _CID and check for a PCI Root Bridge */ |
| 412 | |
| 413 | Status = AcpiUtExecute_CID (Node, &Cid); |
| 414 | if (ACPI_FAILURE (Status)) |
| 415 | { |
| 416 | return (FALSE); |
| 417 | } |
| 418 | |
| 419 | /* Check all _CIDs in the returned list */ |
| 420 | |
| 421 | for (i = 0; i < Cid->Count; i++) |
| 422 | { |
| 423 | if (AcpiUtIsPciRootBridge (Cid->Ids[i].String)) |
| 424 | { |
| 425 | ACPI_FREE (Cid); |
| 426 | return (TRUE); |
| 427 | } |
| 428 | } |
| 429 | |
| 430 | ACPI_FREE (Cid); |
| 431 | return (FALSE); |
| 432 | } |
| 433 | |
| 434 | |
| 435 | /******************************************************************************* |
| 436 | * |
| 437 | * FUNCTION: AcpiEvPciBarRegionSetup |
| 438 | * |
| 439 | * PARAMETERS: Handle - Region we are interested in |
| 440 | * Function - Start or stop |
| 441 | * HandlerContext - Address space handler context |
| 442 | * RegionContext - Region specific context |
| 443 | * |
| 444 | * RETURN: Status |
| 445 | * |
| 446 | * DESCRIPTION: Setup a PciBAR operation region |
| 447 | * |
| 448 | * MUTEX: Assumes namespace is not locked |
| 449 | * |
| 450 | ******************************************************************************/ |
| 451 | |
| 452 | ACPI_STATUS |
| 453 | AcpiEvPciBarRegionSetup ( |
| 454 | ACPI_HANDLE Handle, |
| 455 | UINT32 Function, |
| 456 | void *HandlerContext, |
| 457 | void **RegionContext) |
| 458 | { |
| 459 | ACPI_FUNCTION_TRACE (EvPciBarRegionSetup); |
| 460 | |
| 461 | |
| 462 | return_ACPI_STATUS (AE_OK); |
| 463 | } |
| 464 | |
| 465 | |
| 466 | /******************************************************************************* |
| 467 | * |
| 468 | * FUNCTION: AcpiEvCmosRegionSetup |
| 469 | * |
| 470 | * PARAMETERS: Handle - Region we are interested in |
| 471 | * Function - Start or stop |
| 472 | * HandlerContext - Address space handler context |
| 473 | * RegionContext - Region specific context |
| 474 | * |
| 475 | * RETURN: Status |
| 476 | * |
| 477 | * DESCRIPTION: Setup a CMOS operation region |
| 478 | * |
| 479 | * MUTEX: Assumes namespace is not locked |
| 480 | * |
| 481 | ******************************************************************************/ |
| 482 | |
| 483 | ACPI_STATUS |
| 484 | AcpiEvCmosRegionSetup ( |
| 485 | ACPI_HANDLE Handle, |
| 486 | UINT32 Function, |
| 487 | void *HandlerContext, |
| 488 | void **RegionContext) |
| 489 | { |
| 490 | ACPI_FUNCTION_TRACE (EvCmosRegionSetup); |
| 491 | |
| 492 | |
| 493 | return_ACPI_STATUS (AE_OK); |
| 494 | } |
| 495 | |
| 496 | |
| 497 | /******************************************************************************* |
| 498 | * |
| 499 | * FUNCTION: AcpiEvDefaultRegionSetup |
| 500 | * |
| 501 | * PARAMETERS: Handle - Region we are interested in |
| 502 | * Function - Start or stop |
| 503 | * HandlerContext - Address space handler context |
| 504 | * RegionContext - Region specific context |
| 505 | * |
| 506 | * RETURN: Status |
| 507 | * |
| 508 | * DESCRIPTION: Default region initialization |
| 509 | * |
| 510 | ******************************************************************************/ |
| 511 | |
| 512 | ACPI_STATUS |
| 513 | AcpiEvDefaultRegionSetup ( |
| 514 | ACPI_HANDLE Handle, |
| 515 | UINT32 Function, |
| 516 | void *HandlerContext, |
| 517 | void **RegionContext) |
| 518 | { |
| 519 | ACPI_FUNCTION_TRACE (EvDefaultRegionSetup); |
| 520 | |
| 521 | |
| 522 | if (Function == ACPI_REGION_DEACTIVATE) |
| 523 | { |
| 524 | *RegionContext = NULL; |
| 525 | } |
| 526 | else |
| 527 | { |
| 528 | *RegionContext = HandlerContext; |
| 529 | } |
| 530 | |
| 531 | return_ACPI_STATUS (AE_OK); |
| 532 | } |
| 533 | |
| 534 | |
| 535 | /******************************************************************************* |
| 536 | * |
| 537 | * FUNCTION: AcpiEvInitializeRegion |
| 538 | * |
| 539 | * PARAMETERS: RegionObj - Region we are initializing |
| 540 | * AcpiNsLocked - Is namespace locked? |
| 541 | * |
| 542 | * RETURN: Status |
| 543 | * |
| 544 | * DESCRIPTION: Initializes the region, finds any _REG methods and saves them |
| 545 | * for execution at a later time |
| 546 | * |
| 547 | * Get the appropriate address space handler for a newly |
| 548 | * created region. |
| 549 | * |
| 550 | * This also performs address space specific initialization. For |
| 551 | * example, PCI regions must have an _ADR object that contains |
| 552 | * a PCI address in the scope of the definition. This address is |
| 553 | * required to perform an access to PCI config space. |
| 554 | * |
| 555 | * MUTEX: Interpreter should be unlocked, because we may run the _REG |
| 556 | * method for this region. |
| 557 | * |
| 558 | ******************************************************************************/ |
| 559 | |
| 560 | ACPI_STATUS |
| 561 | AcpiEvInitializeRegion ( |
| 562 | ACPI_OPERAND_OBJECT *RegionObj, |
| 563 | BOOLEAN AcpiNsLocked) |
| 564 | { |
| 565 | ACPI_OPERAND_OBJECT *HandlerObj; |
| 566 | ACPI_OPERAND_OBJECT *ObjDesc; |
| 567 | ACPI_ADR_SPACE_TYPE SpaceId; |
| 568 | ACPI_NAMESPACE_NODE *Node; |
| 569 | ACPI_STATUS Status; |
| 570 | |
| 571 | |
| 572 | ACPI_FUNCTION_TRACE_U32 (EvInitializeRegion, AcpiNsLocked); |
| 573 | |
| 574 | |
| 575 | if (!RegionObj) |
| 576 | { |
| 577 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 578 | } |
| 579 | |
| 580 | if (RegionObj->Common.Flags & AOPOBJ_OBJECT_INITIALIZED) |
| 581 | { |
| 582 | return_ACPI_STATUS (AE_OK); |
| 583 | } |
| 584 | |
| 585 | RegionObj->Common.Flags |= AOPOBJ_OBJECT_INITIALIZED; |
| 586 | |
| 587 | Node = RegionObj->Region.Node->Parent; |
| 588 | SpaceId = RegionObj->Region.SpaceId; |
| 589 | |
| 590 | /* |
| 591 | * The following loop depends upon the root Node having no parent |
| 592 | * ie: AcpiGbl_RootNode->Parent being set to NULL |
| 593 | */ |
| 594 | while (Node) |
| 595 | { |
| 596 | /* Check to see if a handler exists */ |
| 597 | |
| 598 | HandlerObj = NULL; |
| 599 | ObjDesc = AcpiNsGetAttachedObject (Node); |
| 600 | if (ObjDesc) |
| 601 | { |
| 602 | /* Can only be a handler if the object exists */ |
| 603 | |
| 604 | switch (Node->Type) |
| 605 | { |
| 606 | case ACPI_TYPE_DEVICE: |
| 607 | case ACPI_TYPE_PROCESSOR: |
| 608 | case ACPI_TYPE_THERMAL: |
| 609 | |
| 610 | HandlerObj = ObjDesc->CommonNotify.Handler; |
| 611 | break; |
| 612 | |
| 613 | case ACPI_TYPE_METHOD: |
| 614 | /* |
| 615 | * If we are executing module level code, the original |
| 616 | * Node's object was replaced by this Method object and we |
| 617 | * saved the handler in the method object. |
| 618 | * |
| 619 | * See AcpiNsExecModuleCode |
| 620 | */ |
| 621 | if (!AcpiGbl_ParseTableAsTermList && |
| 622 | ObjDesc->Method.InfoFlags & ACPI_METHOD_MODULE_LEVEL) |
| 623 | { |
| 624 | HandlerObj = ObjDesc->Method.Dispatch.Handler; |
| 625 | } |
| 626 | break; |
| 627 | |
| 628 | default: |
| 629 | |
| 630 | /* Ignore other objects */ |
| 631 | |
| 632 | break; |
| 633 | } |
| 634 | |
| 635 | HandlerObj = AcpiEvFindRegionHandler (SpaceId, HandlerObj); |
| 636 | if (HandlerObj) |
| 637 | { |
| 638 | /* Found correct handler */ |
| 639 | |
| 640 | ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, |
| 641 | "Found handler %p for region %p in obj %p\n" , |
| 642 | HandlerObj, RegionObj, ObjDesc)); |
| 643 | |
| 644 | Status = AcpiEvAttachRegion (HandlerObj, RegionObj, |
| 645 | AcpiNsLocked); |
| 646 | |
| 647 | /* |
| 648 | * Tell all users that this region is usable by |
| 649 | * running the _REG method |
| 650 | */ |
| 651 | if (AcpiNsLocked) |
| 652 | { |
| 653 | Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); |
| 654 | if (ACPI_FAILURE (Status)) |
| 655 | { |
| 656 | return_ACPI_STATUS (Status); |
| 657 | } |
| 658 | } |
| 659 | |
| 660 | Status = AcpiEvExecuteRegMethod (RegionObj, ACPI_REG_CONNECT); |
| 661 | |
| 662 | if (AcpiNsLocked) |
| 663 | { |
| 664 | Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); |
| 665 | if (ACPI_FAILURE (Status)) |
| 666 | { |
| 667 | return_ACPI_STATUS (Status); |
| 668 | } |
| 669 | } |
| 670 | |
| 671 | return_ACPI_STATUS (AE_OK); |
| 672 | } |
| 673 | } |
| 674 | |
| 675 | /* This node does not have the handler we need; Pop up one level */ |
| 676 | |
| 677 | Node = Node->Parent; |
| 678 | } |
| 679 | |
| 680 | /* If we get here, there is no handler for this region */ |
| 681 | |
| 682 | ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, |
| 683 | "No handler for RegionType %s(%X) (RegionObj %p)\n" , |
| 684 | AcpiUtGetRegionName (SpaceId), SpaceId, RegionObj)); |
| 685 | |
| 686 | return_ACPI_STATUS (AE_NOT_EXIST); |
| 687 | } |
| 688 | |