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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 | /****************************************************************************** * * Module Name: evrgnini- ACPI address_space (op_region) init * *****************************************************************************/ /* * Copyright (C) 2000 - 2016, Intel Corp. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions, and the following disclaimer, * without modification. * 2. Redistributions in binary form must reproduce at minimum a disclaimer * substantially similar to the "NO WARRANTY" disclaimer below * ("Disclaimer") and any redistribution must be conditioned upon * including a substantially similar Disclaimer requirement for further * binary redistribution. * 3. Neither the names of the above-listed copyright holders nor the names * of any contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * Alternatively, this software may be distributed under the terms of the * GNU General Public License ("GPL") version 2 as published by the Free * Software Foundation. * * NO WARRANTY * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGES. */ #include <acpi/acpi.h> #include "accommon.h" #include "acevents.h" #include "acnamesp.h" #define _COMPONENT ACPI_EVENTS ACPI_MODULE_NAME("evrgnini") /* Local prototypes */ static u8 acpi_ev_is_pci_root_bridge(struct acpi_namespace_node *node); /******************************************************************************* * * FUNCTION: acpi_ev_system_memory_region_setup * * PARAMETERS: handle - Region we are interested in * function - Start or stop * handler_context - Address space handler context * region_context - Region specific context * * RETURN: Status * * DESCRIPTION: Setup a system_memory operation region * ******************************************************************************/ acpi_status acpi_ev_system_memory_region_setup(acpi_handle handle, u32 function, void *handler_context, void **region_context) { union acpi_operand_object *region_desc = (union acpi_operand_object *)handle; struct acpi_mem_space_context *local_region_context; ACPI_FUNCTION_TRACE(ev_system_memory_region_setup); if (function == ACPI_REGION_DEACTIVATE) { if (*region_context) { local_region_context = (struct acpi_mem_space_context *)*region_context; /* Delete a cached mapping if present */ if (local_region_context->mapped_length) { acpi_os_unmap_memory(local_region_context-> mapped_logical_address, local_region_context-> mapped_length); } ACPI_FREE(local_region_context); *region_context = NULL; } return_ACPI_STATUS(AE_OK); } /* Create a new context */ local_region_context = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_mem_space_context)); if (!(local_region_context)) { return_ACPI_STATUS(AE_NO_MEMORY); } /* Save the region length and address for use in the handler */ local_region_context->length = region_desc->region.length; local_region_context->address = region_desc->region.address; *region_context = local_region_context; return_ACPI_STATUS(AE_OK); } /******************************************************************************* * * FUNCTION: acpi_ev_io_space_region_setup * * PARAMETERS: handle - Region we are interested in * function - Start or stop * handler_context - Address space handler context * region_context - Region specific context * * RETURN: Status * * DESCRIPTION: Setup a IO operation region * ******************************************************************************/ acpi_status acpi_ev_io_space_region_setup(acpi_handle handle, u32 function, void *handler_context, void **region_context) { ACPI_FUNCTION_TRACE(ev_io_space_region_setup); if (function == ACPI_REGION_DEACTIVATE) { *region_context = NULL; } else { *region_context = handler_context; } return_ACPI_STATUS(AE_OK); } /******************************************************************************* * * FUNCTION: acpi_ev_pci_config_region_setup * * PARAMETERS: handle - Region we are interested in * function - Start or stop * handler_context - Address space handler context * region_context - Region specific context * * RETURN: Status * * DESCRIPTION: Setup a PCI_Config operation region * * MUTEX: Assumes namespace is not locked * ******************************************************************************/ acpi_status acpi_ev_pci_config_region_setup(acpi_handle handle, u32 function, void *handler_context, void **region_context) { acpi_status status = AE_OK; u64 pci_value; struct acpi_pci_id *pci_id = *region_context; union acpi_operand_object *handler_obj; struct acpi_namespace_node *parent_node; struct acpi_namespace_node *pci_root_node; struct acpi_namespace_node *pci_device_node; union acpi_operand_object *region_obj = (union acpi_operand_object *)handle; ACPI_FUNCTION_TRACE(ev_pci_config_region_setup); handler_obj = region_obj->region.handler; if (!handler_obj) { /* * No installed handler. This shouldn't happen because the dispatch * routine checks before we get here, but we check again just in case. */ ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, "Attempting to init a region %p, with no handler\n", region_obj)); return_ACPI_STATUS(AE_NOT_EXIST); } *region_context = NULL; if (function == ACPI_REGION_DEACTIVATE) { if (pci_id) { ACPI_FREE(pci_id); } return_ACPI_STATUS(status); } parent_node = region_obj->region.node->parent; /* * Get the _SEG and _BBN values from the device upon which the handler * is installed. * * We need to get the _SEG and _BBN objects relative to the PCI BUS device. * This is the device the handler has been registered to handle. */ /* * If the address_space.Node is still pointing to the root, we need * to scan upward for a PCI Root bridge and re-associate the op_region * handlers with that device. */ if (handler_obj->address_space.node == acpi_gbl_root_node) { /* Start search from the parent object */ pci_root_node = parent_node; while (pci_root_node != acpi_gbl_root_node) { /* Get the _HID/_CID in order to detect a root_bridge */ if (acpi_ev_is_pci_root_bridge(pci_root_node)) { /* Install a handler for this PCI root bridge */ status = acpi_install_address_space_handler((acpi_handle) pci_root_node, ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL); if (ACPI_FAILURE(status)) { if (status == AE_SAME_HANDLER) { /* * It is OK if the handler is already installed on the * root bridge. Still need to return a context object * for the new PCI_Config operation region, however. */ status = AE_OK; } else { ACPI_EXCEPTION((AE_INFO, status, "Could not install PciConfig handler " "for Root Bridge %4.4s", acpi_ut_get_node_name (pci_root_node))); } } break; } pci_root_node = pci_root_node->parent; } /* PCI root bridge not found, use namespace root node */ } else { pci_root_node = handler_obj->address_space.node; } /* * If this region is now initialized, we are done. * (install_address_space_handler could have initialized it) */ if (region_obj->region.flags & AOPOBJ_SETUP_COMPLETE) { return_ACPI_STATUS(AE_OK); } /* Region is still not initialized. Create a new context */ pci_id = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_pci_id)); if (!pci_id) { return_ACPI_STATUS(AE_NO_MEMORY); } /* * For PCI_Config space access, we need the segment, bus, device and * function numbers. Acquire them here. * * Find the parent device object. (This allows the operation region to be * within a subscope under the device, such as a control method.) */ pci_device_node = region_obj->region.node; while (pci_device_node && (pci_device_node->type != ACPI_TYPE_DEVICE)) { pci_device_node = pci_device_node->parent; } if (!pci_device_node) { ACPI_FREE(pci_id); return_ACPI_STATUS(AE_AML_OPERAND_TYPE); } /* * Get the PCI device and function numbers from the _ADR object * contained in the parent's scope. */ status = acpi_ut_evaluate_numeric_object(METHOD_NAME__ADR, pci_device_node, &pci_value); /* * The default is zero, and since the allocation above zeroed the data, * just do nothing on failure. */ if (ACPI_SUCCESS(status)) { pci_id->device = ACPI_HIWORD(ACPI_LODWORD(pci_value)); pci_id->function = ACPI_LOWORD(ACPI_LODWORD(pci_value)); } /* The PCI segment number comes from the _SEG method */ status = acpi_ut_evaluate_numeric_object(METHOD_NAME__SEG, pci_root_node, &pci_value); if (ACPI_SUCCESS(status)) { pci_id->segment = ACPI_LOWORD(pci_value); } /* The PCI bus number comes from the _BBN method */ status = acpi_ut_evaluate_numeric_object(METHOD_NAME__BBN, pci_root_node, &pci_value); if (ACPI_SUCCESS(status)) { pci_id->bus = ACPI_LOWORD(pci_value); } /* Complete/update the PCI ID for this device */ status = acpi_hw_derive_pci_id(pci_id, pci_root_node, region_obj->region.node); if (ACPI_FAILURE(status)) { ACPI_FREE(pci_id); return_ACPI_STATUS(status); } *region_context = pci_id; return_ACPI_STATUS(AE_OK); } /******************************************************************************* * * FUNCTION: acpi_ev_is_pci_root_bridge * * PARAMETERS: node - Device node being examined * * RETURN: TRUE if device is a PCI/PCI-Express Root Bridge * * DESCRIPTION: Determine if the input device represents a PCI Root Bridge by * examining the _HID and _CID for the device. * ******************************************************************************/ static u8 acpi_ev_is_pci_root_bridge(struct acpi_namespace_node *node) { acpi_status status; struct acpi_pnp_device_id *hid; struct acpi_pnp_device_id_list *cid; u32 i; u8 match; /* Get the _HID and check for a PCI Root Bridge */ status = acpi_ut_execute_HID(node, &hid); if (ACPI_FAILURE(status)) { return (FALSE); } match = acpi_ut_is_pci_root_bridge(hid->string); ACPI_FREE(hid); if (match) { return (TRUE); } /* The _HID did not match. Get the _CID and check for a PCI Root Bridge */ status = acpi_ut_execute_CID(node, &cid); if (ACPI_FAILURE(status)) { return (FALSE); } /* Check all _CIDs in the returned list */ for (i = 0; i < cid->count; i++) { if (acpi_ut_is_pci_root_bridge(cid->ids[i].string)) { ACPI_FREE(cid); return (TRUE); } } ACPI_FREE(cid); return (FALSE); } /******************************************************************************* * * FUNCTION: acpi_ev_pci_bar_region_setup * * PARAMETERS: handle - Region we are interested in * function - Start or stop * handler_context - Address space handler context * region_context - Region specific context * * RETURN: Status * * DESCRIPTION: Setup a pci_BAR operation region * * MUTEX: Assumes namespace is not locked * ******************************************************************************/ acpi_status acpi_ev_pci_bar_region_setup(acpi_handle handle, u32 function, void *handler_context, void **region_context) { ACPI_FUNCTION_TRACE(ev_pci_bar_region_setup); return_ACPI_STATUS(AE_OK); } /******************************************************************************* * * FUNCTION: acpi_ev_cmos_region_setup * * PARAMETERS: handle - Region we are interested in * function - Start or stop * handler_context - Address space handler context * region_context - Region specific context * * RETURN: Status * * DESCRIPTION: Setup a CMOS operation region * * MUTEX: Assumes namespace is not locked * ******************************************************************************/ acpi_status acpi_ev_cmos_region_setup(acpi_handle handle, u32 function, void *handler_context, void **region_context) { ACPI_FUNCTION_TRACE(ev_cmos_region_setup); return_ACPI_STATUS(AE_OK); } /******************************************************************************* * * FUNCTION: acpi_ev_default_region_setup * * PARAMETERS: handle - Region we are interested in * function - Start or stop * handler_context - Address space handler context * region_context - Region specific context * * RETURN: Status * * DESCRIPTION: Default region initialization * ******************************************************************************/ acpi_status acpi_ev_default_region_setup(acpi_handle handle, u32 function, void *handler_context, void **region_context) { ACPI_FUNCTION_TRACE(ev_default_region_setup); if (function == ACPI_REGION_DEACTIVATE) { *region_context = NULL; } else { *region_context = handler_context; } return_ACPI_STATUS(AE_OK); } /******************************************************************************* * * FUNCTION: acpi_ev_initialize_region * * PARAMETERS: region_obj - Region we are initializing * acpi_ns_locked - Is namespace locked? * * RETURN: Status * * DESCRIPTION: Initializes the region, finds any _REG methods and saves them * for execution at a later time * * Get the appropriate address space handler for a newly * created region. * * This also performs address space specific initialization. For * example, PCI regions must have an _ADR object that contains * a PCI address in the scope of the definition. This address is * required to perform an access to PCI config space. * * MUTEX: Interpreter should be unlocked, because we may run the _REG * method for this region. * ******************************************************************************/ acpi_status acpi_ev_initialize_region(union acpi_operand_object *region_obj, u8 acpi_ns_locked) { union acpi_operand_object *handler_obj; union acpi_operand_object *obj_desc; acpi_adr_space_type space_id; struct acpi_namespace_node *node; acpi_status status; ACPI_FUNCTION_TRACE_U32(ev_initialize_region, acpi_ns_locked); if (!region_obj) { return_ACPI_STATUS(AE_BAD_PARAMETER); } if (region_obj->common.flags & AOPOBJ_OBJECT_INITIALIZED) { return_ACPI_STATUS(AE_OK); } acpi_ev_associate_reg_method(region_obj); region_obj->common.flags |= AOPOBJ_OBJECT_INITIALIZED; node = region_obj->region.node->parent; space_id = region_obj->region.space_id; /* * The following loop depends upon the root Node having no parent * ie: acpi_gbl_root_node->Parent being set to NULL */ while (node) { /* Check to see if a handler exists */ handler_obj = NULL; obj_desc = acpi_ns_get_attached_object(node); if (obj_desc) { /* Can only be a handler if the object exists */ switch (node->type) { case ACPI_TYPE_DEVICE: case ACPI_TYPE_PROCESSOR: case ACPI_TYPE_THERMAL: handler_obj = obj_desc->common_notify.handler; break; case ACPI_TYPE_METHOD: /* * If we are executing module level code, the original * Node's object was replaced by this Method object and we * saved the handler in the method object. * * See acpi_ns_exec_module_code */ if (obj_desc->method. info_flags & ACPI_METHOD_MODULE_LEVEL) { handler_obj = obj_desc->method.dispatch.handler; } break; default: /* Ignore other objects */ break; } handler_obj = acpi_ev_find_region_handler(space_id, handler_obj); if (handler_obj) { /* Found correct handler */ ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, "Found handler %p for region %p in obj %p\n", handler_obj, region_obj, obj_desc)); status = acpi_ev_attach_region(handler_obj, region_obj, acpi_ns_locked); /* * Tell all users that this region is usable by * running the _REG method */ if (acpi_ns_locked) { status = acpi_ut_release_mutex (ACPI_MTX_NAMESPACE); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } } status = acpi_ev_execute_reg_method(region_obj, ACPI_REG_CONNECT); if (acpi_ns_locked) { status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } } return_ACPI_STATUS(AE_OK); } } /* This node does not have the handler we need; Pop up one level */ node = node->parent; } /* If we get here, there is no handler for this region */ ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, "No handler for RegionType %s(%X) (RegionObj %p)\n", acpi_ut_get_region_name(space_id), space_id, region_obj)); return_ACPI_STATUS(AE_NOT_EXIST); } |