| 1 | /******************************************************************************* |
| 2 | * |
| 3 | * Module Name: rsxface - Public interfaces to the resource manager |
| 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 | #define EXPORT_ACPI_INTERFACES |
| 45 | |
| 46 | #include "acpi.h" |
| 47 | #include "accommon.h" |
| 48 | #include "acresrc.h" |
| 49 | #include "acnamesp.h" |
| 50 | |
| 51 | #define _COMPONENT ACPI_RESOURCES |
| 52 | ACPI_MODULE_NAME ("rsxface" ) |
| 53 | |
| 54 | /* Local macros for 16,32-bit to 64-bit conversion */ |
| 55 | |
| 56 | #define ACPI_COPY_FIELD(Out, In, Field) ((Out)->Field = (In)->Field) |
| 57 | #define ACPI_COPY_ADDRESS(Out, In) \ |
| 58 | ACPI_COPY_FIELD(Out, In, ResourceType); \ |
| 59 | ACPI_COPY_FIELD(Out, In, ProducerConsumer); \ |
| 60 | ACPI_COPY_FIELD(Out, In, Decode); \ |
| 61 | ACPI_COPY_FIELD(Out, In, MinAddressFixed); \ |
| 62 | ACPI_COPY_FIELD(Out, In, MaxAddressFixed); \ |
| 63 | ACPI_COPY_FIELD(Out, In, Info); \ |
| 64 | ACPI_COPY_FIELD(Out, In, Address.Granularity); \ |
| 65 | ACPI_COPY_FIELD(Out, In, Address.Minimum); \ |
| 66 | ACPI_COPY_FIELD(Out, In, Address.Maximum); \ |
| 67 | ACPI_COPY_FIELD(Out, In, Address.TranslationOffset); \ |
| 68 | ACPI_COPY_FIELD(Out, In, Address.AddressLength); \ |
| 69 | ACPI_COPY_FIELD(Out, In, ResourceSource); |
| 70 | |
| 71 | |
| 72 | /* Local prototypes */ |
| 73 | |
| 74 | static ACPI_STATUS |
| 75 | AcpiRsMatchVendorResource ( |
| 76 | ACPI_RESOURCE *Resource, |
| 77 | void *Context); |
| 78 | |
| 79 | static ACPI_STATUS |
| 80 | AcpiRsValidateParameters ( |
| 81 | ACPI_HANDLE DeviceHandle, |
| 82 | ACPI_BUFFER *Buffer, |
| 83 | ACPI_NAMESPACE_NODE **ReturnNode); |
| 84 | |
| 85 | |
| 86 | /******************************************************************************* |
| 87 | * |
| 88 | * FUNCTION: AcpiRsValidateParameters |
| 89 | * |
| 90 | * PARAMETERS: DeviceHandle - Handle to a device |
| 91 | * Buffer - Pointer to a data buffer |
| 92 | * ReturnNode - Pointer to where the device node is returned |
| 93 | * |
| 94 | * RETURN: Status |
| 95 | * |
| 96 | * DESCRIPTION: Common parameter validation for resource interfaces |
| 97 | * |
| 98 | ******************************************************************************/ |
| 99 | |
| 100 | static ACPI_STATUS |
| 101 | AcpiRsValidateParameters ( |
| 102 | ACPI_HANDLE DeviceHandle, |
| 103 | ACPI_BUFFER *Buffer, |
| 104 | ACPI_NAMESPACE_NODE **ReturnNode) |
| 105 | { |
| 106 | ACPI_STATUS Status; |
| 107 | ACPI_NAMESPACE_NODE *Node; |
| 108 | |
| 109 | |
| 110 | ACPI_FUNCTION_TRACE (RsValidateParameters); |
| 111 | |
| 112 | |
| 113 | /* |
| 114 | * Must have a valid handle to an ACPI device |
| 115 | */ |
| 116 | if (!DeviceHandle) |
| 117 | { |
| 118 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 119 | } |
| 120 | |
| 121 | Node = AcpiNsValidateHandle (DeviceHandle); |
| 122 | if (!Node) |
| 123 | { |
| 124 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 125 | } |
| 126 | |
| 127 | if (Node->Type != ACPI_TYPE_DEVICE) |
| 128 | { |
| 129 | return_ACPI_STATUS (AE_TYPE); |
| 130 | } |
| 131 | |
| 132 | /* |
| 133 | * Validate the user buffer object |
| 134 | * |
| 135 | * if there is a non-zero buffer length we also need a valid pointer in |
| 136 | * the buffer. If it's a zero buffer length, we'll be returning the |
| 137 | * needed buffer size (later), so keep going. |
| 138 | */ |
| 139 | Status = AcpiUtValidateBuffer (Buffer); |
| 140 | if (ACPI_FAILURE (Status)) |
| 141 | { |
| 142 | return_ACPI_STATUS (Status); |
| 143 | } |
| 144 | |
| 145 | *ReturnNode = Node; |
| 146 | return_ACPI_STATUS (AE_OK); |
| 147 | } |
| 148 | |
| 149 | |
| 150 | /******************************************************************************* |
| 151 | * |
| 152 | * FUNCTION: AcpiGetIrqRoutingTable |
| 153 | * |
| 154 | * PARAMETERS: DeviceHandle - Handle to the Bus device we are querying |
| 155 | * RetBuffer - Pointer to a buffer to receive the |
| 156 | * current resources for the device |
| 157 | * |
| 158 | * RETURN: Status |
| 159 | * |
| 160 | * DESCRIPTION: This function is called to get the IRQ routing table for a |
| 161 | * specific bus. The caller must first acquire a handle for the |
| 162 | * desired bus. The routine table is placed in the buffer pointed |
| 163 | * to by the RetBuffer variable parameter. |
| 164 | * |
| 165 | * If the function fails an appropriate status will be returned |
| 166 | * and the value of RetBuffer is undefined. |
| 167 | * |
| 168 | * This function attempts to execute the _PRT method contained in |
| 169 | * the object indicated by the passed DeviceHandle. |
| 170 | * |
| 171 | ******************************************************************************/ |
| 172 | |
| 173 | ACPI_STATUS |
| 174 | AcpiGetIrqRoutingTable ( |
| 175 | ACPI_HANDLE DeviceHandle, |
| 176 | ACPI_BUFFER *RetBuffer) |
| 177 | { |
| 178 | ACPI_STATUS Status; |
| 179 | ACPI_NAMESPACE_NODE *Node; |
| 180 | |
| 181 | |
| 182 | ACPI_FUNCTION_TRACE (AcpiGetIrqRoutingTable); |
| 183 | |
| 184 | |
| 185 | /* Validate parameters then dispatch to internal routine */ |
| 186 | |
| 187 | Status = AcpiRsValidateParameters (DeviceHandle, RetBuffer, &Node); |
| 188 | if (ACPI_FAILURE (Status)) |
| 189 | { |
| 190 | return_ACPI_STATUS (Status); |
| 191 | } |
| 192 | |
| 193 | Status = AcpiRsGetPrtMethodData (Node, RetBuffer); |
| 194 | return_ACPI_STATUS (Status); |
| 195 | } |
| 196 | |
| 197 | ACPI_EXPORT_SYMBOL (AcpiGetIrqRoutingTable) |
| 198 | |
| 199 | |
| 200 | /******************************************************************************* |
| 201 | * |
| 202 | * FUNCTION: AcpiGetCurrentResources |
| 203 | * |
| 204 | * PARAMETERS: DeviceHandle - Handle to the device object for the |
| 205 | * device we are querying |
| 206 | * RetBuffer - Pointer to a buffer to receive the |
| 207 | * current resources for the device |
| 208 | * |
| 209 | * RETURN: Status |
| 210 | * |
| 211 | * DESCRIPTION: This function is called to get the current resources for a |
| 212 | * specific device. The caller must first acquire a handle for |
| 213 | * the desired device. The resource data is placed in the buffer |
| 214 | * pointed to by the RetBuffer variable parameter. |
| 215 | * |
| 216 | * If the function fails an appropriate status will be returned |
| 217 | * and the value of RetBuffer is undefined. |
| 218 | * |
| 219 | * This function attempts to execute the _CRS method contained in |
| 220 | * the object indicated by the passed DeviceHandle. |
| 221 | * |
| 222 | ******************************************************************************/ |
| 223 | |
| 224 | ACPI_STATUS |
| 225 | AcpiGetCurrentResources ( |
| 226 | ACPI_HANDLE DeviceHandle, |
| 227 | ACPI_BUFFER *RetBuffer) |
| 228 | { |
| 229 | ACPI_STATUS Status; |
| 230 | ACPI_NAMESPACE_NODE *Node; |
| 231 | |
| 232 | |
| 233 | ACPI_FUNCTION_TRACE (AcpiGetCurrentResources); |
| 234 | |
| 235 | |
| 236 | /* Validate parameters then dispatch to internal routine */ |
| 237 | |
| 238 | Status = AcpiRsValidateParameters (DeviceHandle, RetBuffer, &Node); |
| 239 | if (ACPI_FAILURE (Status)) |
| 240 | { |
| 241 | return_ACPI_STATUS (Status); |
| 242 | } |
| 243 | |
| 244 | Status = AcpiRsGetCrsMethodData (Node, RetBuffer); |
| 245 | return_ACPI_STATUS (Status); |
| 246 | } |
| 247 | |
| 248 | ACPI_EXPORT_SYMBOL (AcpiGetCurrentResources) |
| 249 | |
| 250 | |
| 251 | /******************************************************************************* |
| 252 | * |
| 253 | * FUNCTION: AcpiGetPossibleResources |
| 254 | * |
| 255 | * PARAMETERS: DeviceHandle - Handle to the device object for the |
| 256 | * device we are querying |
| 257 | * RetBuffer - Pointer to a buffer to receive the |
| 258 | * resources for the device |
| 259 | * |
| 260 | * RETURN: Status |
| 261 | * |
| 262 | * DESCRIPTION: This function is called to get a list of the possible resources |
| 263 | * for a specific device. The caller must first acquire a handle |
| 264 | * for the desired device. The resource data is placed in the |
| 265 | * buffer pointed to by the RetBuffer variable. |
| 266 | * |
| 267 | * If the function fails an appropriate status will be returned |
| 268 | * and the value of RetBuffer is undefined. |
| 269 | * |
| 270 | ******************************************************************************/ |
| 271 | |
| 272 | ACPI_STATUS |
| 273 | AcpiGetPossibleResources ( |
| 274 | ACPI_HANDLE DeviceHandle, |
| 275 | ACPI_BUFFER *RetBuffer) |
| 276 | { |
| 277 | ACPI_STATUS Status; |
| 278 | ACPI_NAMESPACE_NODE *Node; |
| 279 | |
| 280 | |
| 281 | ACPI_FUNCTION_TRACE (AcpiGetPossibleResources); |
| 282 | |
| 283 | |
| 284 | /* Validate parameters then dispatch to internal routine */ |
| 285 | |
| 286 | Status = AcpiRsValidateParameters (DeviceHandle, RetBuffer, &Node); |
| 287 | if (ACPI_FAILURE (Status)) |
| 288 | { |
| 289 | return_ACPI_STATUS (Status); |
| 290 | } |
| 291 | |
| 292 | Status = AcpiRsGetPrsMethodData (Node, RetBuffer); |
| 293 | return_ACPI_STATUS (Status); |
| 294 | } |
| 295 | |
| 296 | ACPI_EXPORT_SYMBOL (AcpiGetPossibleResources) |
| 297 | |
| 298 | |
| 299 | /******************************************************************************* |
| 300 | * |
| 301 | * FUNCTION: AcpiSetCurrentResources |
| 302 | * |
| 303 | * PARAMETERS: DeviceHandle - Handle to the device object for the |
| 304 | * device we are setting resources |
| 305 | * InBuffer - Pointer to a buffer containing the |
| 306 | * resources to be set for the device |
| 307 | * |
| 308 | * RETURN: Status |
| 309 | * |
| 310 | * DESCRIPTION: This function is called to set the current resources for a |
| 311 | * specific device. The caller must first acquire a handle for |
| 312 | * the desired device. The resource data is passed to the routine |
| 313 | * the buffer pointed to by the InBuffer variable. |
| 314 | * |
| 315 | ******************************************************************************/ |
| 316 | |
| 317 | ACPI_STATUS |
| 318 | AcpiSetCurrentResources ( |
| 319 | ACPI_HANDLE DeviceHandle, |
| 320 | ACPI_BUFFER *InBuffer) |
| 321 | { |
| 322 | ACPI_STATUS Status; |
| 323 | ACPI_NAMESPACE_NODE *Node; |
| 324 | |
| 325 | |
| 326 | ACPI_FUNCTION_TRACE (AcpiSetCurrentResources); |
| 327 | |
| 328 | |
| 329 | /* Validate the buffer, don't allow zero length */ |
| 330 | |
| 331 | if ((!InBuffer) || |
| 332 | (!InBuffer->Pointer) || |
| 333 | (!InBuffer->Length)) |
| 334 | { |
| 335 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 336 | } |
| 337 | |
| 338 | /* Validate parameters then dispatch to internal routine */ |
| 339 | |
| 340 | Status = AcpiRsValidateParameters (DeviceHandle, InBuffer, &Node); |
| 341 | if (ACPI_FAILURE (Status)) |
| 342 | { |
| 343 | return_ACPI_STATUS (Status); |
| 344 | } |
| 345 | |
| 346 | Status = AcpiRsSetSrsMethodData (Node, InBuffer); |
| 347 | return_ACPI_STATUS (Status); |
| 348 | } |
| 349 | |
| 350 | ACPI_EXPORT_SYMBOL (AcpiSetCurrentResources) |
| 351 | |
| 352 | |
| 353 | /******************************************************************************* |
| 354 | * |
| 355 | * FUNCTION: AcpiGetEventResources |
| 356 | * |
| 357 | * PARAMETERS: DeviceHandle - Handle to the device object for the |
| 358 | * device we are getting resources |
| 359 | * InBuffer - Pointer to a buffer containing the |
| 360 | * resources to be set for the device |
| 361 | * |
| 362 | * RETURN: Status |
| 363 | * |
| 364 | * DESCRIPTION: This function is called to get the event resources for a |
| 365 | * specific device. The caller must first acquire a handle for |
| 366 | * the desired device. The resource data is passed to the routine |
| 367 | * the buffer pointed to by the InBuffer variable. Uses the |
| 368 | * _AEI method. |
| 369 | * |
| 370 | ******************************************************************************/ |
| 371 | |
| 372 | ACPI_STATUS |
| 373 | AcpiGetEventResources ( |
| 374 | ACPI_HANDLE DeviceHandle, |
| 375 | ACPI_BUFFER *RetBuffer) |
| 376 | { |
| 377 | ACPI_STATUS Status; |
| 378 | ACPI_NAMESPACE_NODE *Node; |
| 379 | |
| 380 | |
| 381 | ACPI_FUNCTION_TRACE (AcpiGetEventResources); |
| 382 | |
| 383 | |
| 384 | /* Validate parameters then dispatch to internal routine */ |
| 385 | |
| 386 | Status = AcpiRsValidateParameters (DeviceHandle, RetBuffer, &Node); |
| 387 | if (ACPI_FAILURE (Status)) |
| 388 | { |
| 389 | return_ACPI_STATUS (Status); |
| 390 | } |
| 391 | |
| 392 | Status = AcpiRsGetAeiMethodData (Node, RetBuffer); |
| 393 | return_ACPI_STATUS (Status); |
| 394 | } |
| 395 | |
| 396 | ACPI_EXPORT_SYMBOL (AcpiGetEventResources) |
| 397 | |
| 398 | |
| 399 | /****************************************************************************** |
| 400 | * |
| 401 | * FUNCTION: AcpiResourceToAddress64 |
| 402 | * |
| 403 | * PARAMETERS: Resource - Pointer to a resource |
| 404 | * Out - Pointer to the users's return buffer |
| 405 | * (a struct acpi_resource_address64) |
| 406 | * |
| 407 | * RETURN: Status |
| 408 | * |
| 409 | * DESCRIPTION: If the resource is an address16, address32, or address64, |
| 410 | * copy it to the address64 return buffer. This saves the |
| 411 | * caller from having to duplicate code for different-sized |
| 412 | * addresses. |
| 413 | * |
| 414 | ******************************************************************************/ |
| 415 | |
| 416 | ACPI_STATUS |
| 417 | AcpiResourceToAddress64 ( |
| 418 | ACPI_RESOURCE *Resource, |
| 419 | ACPI_RESOURCE_ADDRESS64 *Out) |
| 420 | { |
| 421 | ACPI_RESOURCE_ADDRESS16 *Address16; |
| 422 | ACPI_RESOURCE_ADDRESS32 *Address32; |
| 423 | |
| 424 | |
| 425 | if (!Resource || !Out) |
| 426 | { |
| 427 | return (AE_BAD_PARAMETER); |
| 428 | } |
| 429 | |
| 430 | /* Convert 16 or 32 address descriptor to 64 */ |
| 431 | |
| 432 | switch (Resource->Type) |
| 433 | { |
| 434 | case ACPI_RESOURCE_TYPE_ADDRESS16: |
| 435 | |
| 436 | Address16 = ACPI_CAST_PTR ( |
| 437 | ACPI_RESOURCE_ADDRESS16, &Resource->Data); |
| 438 | ACPI_COPY_ADDRESS (Out, Address16); |
| 439 | break; |
| 440 | |
| 441 | case ACPI_RESOURCE_TYPE_ADDRESS32: |
| 442 | |
| 443 | Address32 = ACPI_CAST_PTR ( |
| 444 | ACPI_RESOURCE_ADDRESS32, &Resource->Data); |
| 445 | ACPI_COPY_ADDRESS (Out, Address32); |
| 446 | break; |
| 447 | |
| 448 | case ACPI_RESOURCE_TYPE_ADDRESS64: |
| 449 | |
| 450 | /* Simple copy for 64 bit source */ |
| 451 | |
| 452 | memcpy (Out, &Resource->Data, sizeof (ACPI_RESOURCE_ADDRESS64)); |
| 453 | break; |
| 454 | |
| 455 | default: |
| 456 | |
| 457 | return (AE_BAD_PARAMETER); |
| 458 | } |
| 459 | |
| 460 | return (AE_OK); |
| 461 | } |
| 462 | |
| 463 | ACPI_EXPORT_SYMBOL (AcpiResourceToAddress64) |
| 464 | |
| 465 | |
| 466 | /******************************************************************************* |
| 467 | * |
| 468 | * FUNCTION: AcpiGetVendorResource |
| 469 | * |
| 470 | * PARAMETERS: DeviceHandle - Handle for the parent device object |
| 471 | * Name - Method name for the parent resource |
| 472 | * (METHOD_NAME__CRS or METHOD_NAME__PRS) |
| 473 | * Uuid - Pointer to the UUID to be matched. |
| 474 | * includes both subtype and 16-byte UUID |
| 475 | * RetBuffer - Where the vendor resource is returned |
| 476 | * |
| 477 | * RETURN: Status |
| 478 | * |
| 479 | * DESCRIPTION: Walk a resource template for the specified device to find a |
| 480 | * vendor-defined resource that matches the supplied UUID and |
| 481 | * UUID subtype. Returns a ACPI_RESOURCE of type Vendor. |
| 482 | * |
| 483 | ******************************************************************************/ |
| 484 | |
| 485 | ACPI_STATUS |
| 486 | AcpiGetVendorResource ( |
| 487 | ACPI_HANDLE DeviceHandle, |
| 488 | char *Name, |
| 489 | ACPI_VENDOR_UUID *Uuid, |
| 490 | ACPI_BUFFER *RetBuffer) |
| 491 | { |
| 492 | ACPI_VENDOR_WALK_INFO Info; |
| 493 | ACPI_STATUS Status; |
| 494 | |
| 495 | |
| 496 | /* Other parameters are validated by AcpiWalkResources */ |
| 497 | |
| 498 | if (!Uuid || !RetBuffer) |
| 499 | { |
| 500 | return (AE_BAD_PARAMETER); |
| 501 | } |
| 502 | |
| 503 | Info.Uuid = Uuid; |
| 504 | Info.Buffer = RetBuffer; |
| 505 | Info.Status = AE_NOT_EXIST; |
| 506 | |
| 507 | /* Walk the _CRS or _PRS resource list for this device */ |
| 508 | |
| 509 | Status = AcpiWalkResources ( |
| 510 | DeviceHandle, Name, AcpiRsMatchVendorResource, &Info); |
| 511 | if (ACPI_FAILURE (Status)) |
| 512 | { |
| 513 | return (Status); |
| 514 | } |
| 515 | |
| 516 | return (Info.Status); |
| 517 | } |
| 518 | |
| 519 | ACPI_EXPORT_SYMBOL (AcpiGetVendorResource) |
| 520 | |
| 521 | |
| 522 | /******************************************************************************* |
| 523 | * |
| 524 | * FUNCTION: AcpiRsMatchVendorResource |
| 525 | * |
| 526 | * PARAMETERS: ACPI_WALK_RESOURCE_CALLBACK |
| 527 | * |
| 528 | * RETURN: Status |
| 529 | * |
| 530 | * DESCRIPTION: Match a vendor resource via the ACPI 3.0 UUID |
| 531 | * |
| 532 | ******************************************************************************/ |
| 533 | |
| 534 | static ACPI_STATUS |
| 535 | AcpiRsMatchVendorResource ( |
| 536 | ACPI_RESOURCE *Resource, |
| 537 | void *Context) |
| 538 | { |
| 539 | ACPI_VENDOR_WALK_INFO *Info = Context; |
| 540 | ACPI_RESOURCE_VENDOR_TYPED *Vendor; |
| 541 | ACPI_BUFFER *Buffer; |
| 542 | ACPI_STATUS Status; |
| 543 | |
| 544 | |
| 545 | /* Ignore all descriptors except Vendor */ |
| 546 | |
| 547 | if (Resource->Type != ACPI_RESOURCE_TYPE_VENDOR) |
| 548 | { |
| 549 | return (AE_OK); |
| 550 | } |
| 551 | |
| 552 | Vendor = &Resource->Data.VendorTyped; |
| 553 | |
| 554 | /* |
| 555 | * For a valid match, these conditions must hold: |
| 556 | * |
| 557 | * 1) Length of descriptor data must be at least as long as a UUID struct |
| 558 | * 2) The UUID subtypes must match |
| 559 | * 3) The UUID data must match |
| 560 | */ |
| 561 | if ((Vendor->ByteLength < (ACPI_UUID_LENGTH + 1)) || |
| 562 | (Vendor->UuidSubtype != Info->Uuid->Subtype) || |
| 563 | (memcmp (Vendor->Uuid, Info->Uuid->Data, ACPI_UUID_LENGTH))) |
| 564 | { |
| 565 | return (AE_OK); |
| 566 | } |
| 567 | |
| 568 | /* Validate/Allocate/Clear caller buffer */ |
| 569 | |
| 570 | Buffer = Info->Buffer; |
| 571 | Status = AcpiUtInitializeBuffer (Buffer, Resource->Length); |
| 572 | if (ACPI_FAILURE (Status)) |
| 573 | { |
| 574 | return (Status); |
| 575 | } |
| 576 | |
| 577 | /* Found the correct resource, copy and return it */ |
| 578 | |
| 579 | memcpy (Buffer->Pointer, Resource, Resource->Length); |
| 580 | Buffer->Length = Resource->Length; |
| 581 | |
| 582 | /* Found the desired descriptor, terminate resource walk */ |
| 583 | |
| 584 | Info->Status = AE_OK; |
| 585 | return (AE_CTRL_TERMINATE); |
| 586 | } |
| 587 | |
| 588 | |
| 589 | /******************************************************************************* |
| 590 | * |
| 591 | * FUNCTION: AcpiWalkResourceBuffer |
| 592 | * |
| 593 | * PARAMETERS: Buffer - Formatted buffer returned by one of the |
| 594 | * various Get*Resource functions |
| 595 | * UserFunction - Called for each resource |
| 596 | * Context - Passed to UserFunction |
| 597 | * |
| 598 | * RETURN: Status |
| 599 | * |
| 600 | * DESCRIPTION: Walks the input resource template. The UserFunction is called |
| 601 | * once for each resource in the list. |
| 602 | * |
| 603 | ******************************************************************************/ |
| 604 | |
| 605 | ACPI_STATUS |
| 606 | AcpiWalkResourceBuffer ( |
| 607 | ACPI_BUFFER *Buffer, |
| 608 | ACPI_WALK_RESOURCE_CALLBACK UserFunction, |
| 609 | void *Context) |
| 610 | { |
| 611 | ACPI_STATUS Status = AE_OK; |
| 612 | ACPI_RESOURCE *Resource; |
| 613 | ACPI_RESOURCE *ResourceEnd; |
| 614 | |
| 615 | ACPI_FUNCTION_TRACE (AcpiWalkResourceBuffer); |
| 616 | |
| 617 | |
| 618 | /* Parameter validation */ |
| 619 | |
| 620 | if (!Buffer || !Buffer->Pointer || !UserFunction) |
| 621 | { |
| 622 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 623 | } |
| 624 | |
| 625 | /* Buffer contains the resource list and length */ |
| 626 | |
| 627 | Resource = ACPI_CAST_PTR (ACPI_RESOURCE, Buffer->Pointer); |
| 628 | ResourceEnd = ACPI_ADD_PTR ( |
| 629 | ACPI_RESOURCE, Buffer->Pointer, Buffer->Length); |
| 630 | |
| 631 | /* Walk the resource list until the EndTag is found (or buffer end) */ |
| 632 | |
| 633 | while (Resource < ResourceEnd) |
| 634 | { |
| 635 | /* Sanity check the resource type */ |
| 636 | |
| 637 | if (Resource->Type > ACPI_RESOURCE_TYPE_MAX) |
| 638 | { |
| 639 | Status = AE_AML_INVALID_RESOURCE_TYPE; |
| 640 | break; |
| 641 | } |
| 642 | |
| 643 | /* Sanity check the length. It must not be zero, or we loop forever */ |
| 644 | |
| 645 | if (!Resource->Length) |
| 646 | { |
| 647 | return_ACPI_STATUS (AE_AML_BAD_RESOURCE_LENGTH); |
| 648 | } |
| 649 | |
| 650 | /* Invoke the user function, abort on any error returned */ |
| 651 | |
| 652 | Status = UserFunction (Resource, Context); |
| 653 | if (ACPI_FAILURE (Status)) |
| 654 | { |
| 655 | if (Status == AE_CTRL_TERMINATE) |
| 656 | { |
| 657 | /* This is an OK termination by the user function */ |
| 658 | |
| 659 | Status = AE_OK; |
| 660 | } |
| 661 | break; |
| 662 | } |
| 663 | |
| 664 | /* EndTag indicates end-of-list */ |
| 665 | |
| 666 | if (Resource->Type == ACPI_RESOURCE_TYPE_END_TAG) |
| 667 | { |
| 668 | break; |
| 669 | } |
| 670 | |
| 671 | /* Get the next resource descriptor */ |
| 672 | |
| 673 | Resource = ACPI_NEXT_RESOURCE (Resource); |
| 674 | } |
| 675 | |
| 676 | return_ACPI_STATUS (Status); |
| 677 | } |
| 678 | |
| 679 | ACPI_EXPORT_SYMBOL (AcpiWalkResourceBuffer) |
| 680 | |
| 681 | |
| 682 | /******************************************************************************* |
| 683 | * |
| 684 | * FUNCTION: AcpiWalkResources |
| 685 | * |
| 686 | * PARAMETERS: DeviceHandle - Handle to the device object for the |
| 687 | * device we are querying |
| 688 | * Name - Method name of the resources we want. |
| 689 | * (METHOD_NAME__CRS, METHOD_NAME__PRS, or |
| 690 | * METHOD_NAME__AEI) |
| 691 | * UserFunction - Called for each resource |
| 692 | * Context - Passed to UserFunction |
| 693 | * |
| 694 | * RETURN: Status |
| 695 | * |
| 696 | * DESCRIPTION: Retrieves the current or possible resource list for the |
| 697 | * specified device. The UserFunction is called once for |
| 698 | * each resource in the list. |
| 699 | * |
| 700 | ******************************************************************************/ |
| 701 | |
| 702 | ACPI_STATUS |
| 703 | AcpiWalkResources ( |
| 704 | ACPI_HANDLE DeviceHandle, |
| 705 | const char *Name, |
| 706 | ACPI_WALK_RESOURCE_CALLBACK UserFunction, |
| 707 | void *Context) |
| 708 | { |
| 709 | ACPI_STATUS Status; |
| 710 | ACPI_BUFFER Buffer; |
| 711 | |
| 712 | |
| 713 | ACPI_FUNCTION_TRACE (AcpiWalkResources); |
| 714 | |
| 715 | |
| 716 | /* Parameter validation */ |
| 717 | |
| 718 | if (!DeviceHandle || !UserFunction || !Name || |
| 719 | (!ACPI_COMPARE_NAME (Name, METHOD_NAME__CRS) && |
| 720 | !ACPI_COMPARE_NAME (Name, METHOD_NAME__PRS) && |
| 721 | !ACPI_COMPARE_NAME (Name, METHOD_NAME__AEI))) |
| 722 | { |
| 723 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 724 | } |
| 725 | |
| 726 | /* Get the _CRS/_PRS/_AEI resource list */ |
| 727 | |
| 728 | Buffer.Length = ACPI_ALLOCATE_LOCAL_BUFFER; |
| 729 | Status = AcpiRsGetMethodData (DeviceHandle, __UNCONST(Name), &Buffer); |
| 730 | if (ACPI_FAILURE (Status)) |
| 731 | { |
| 732 | return_ACPI_STATUS (Status); |
| 733 | } |
| 734 | |
| 735 | /* Walk the resource list and cleanup */ |
| 736 | |
| 737 | Status = AcpiWalkResourceBuffer (&Buffer, UserFunction, Context); |
| 738 | ACPI_FREE (Buffer.Pointer); |
| 739 | return_ACPI_STATUS (Status); |
| 740 | } |
| 741 | |
| 742 | ACPI_EXPORT_SYMBOL (AcpiWalkResources) |
| 743 | |