/****************************************************************************** * * Module Name: evrgnini- ACPI address_space (op_region) init * *****************************************************************************/ /* * Copyright (C) 2000 - 2006, R. Byron Moore * 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 #include #include #define _COMPONENT ACPI_EVENTS ACPI_MODULE_NAME("evrgnini") /******************************************************************************* * * 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; acpi_integer 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; union acpi_operand_object *region_obj = (union acpi_operand_object *)handle; struct acpi_device_id object_hID; 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 = acpi_ns_get_parent_node(region_obj->region.node); /* * 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) { status = acpi_ut_execute_HID(pci_root_node, &object_hID); if (ACPI_SUCCESS(status)) { /* * Got a valid _HID string, check if this is a PCI root. * New for ACPI 3.0: check for a PCI Express root also. */ if (! (ACPI_STRNCMP (object_hID.value, PCI_ROOT_HID_STRING, sizeof(PCI_ROOT_HID_STRING)) || !(ACPI_STRNCMP (object_hID.value, PCI_EXPRESS_ROOT_HID_STRING, sizeof(PCI_EXPRESS_ROOT_HID_STRING))))) { /* 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 = acpi_ns_get_parent_node(pci_root_node); } /* 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. */ /* * 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, parent_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 this device's pci_id */ acpi_os_derive_pci_id(pci_root_node, region_obj->region.node, &pci_id); *region_context = pci_id; return_ACPI_STATUS(AE_OK); } /******************************************************************************* * * 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. * ******************************************************************************/ 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; struct acpi_namespace_node *method_node; acpi_name *reg_name_ptr = (acpi_name *) METHOD_NAME__REG; union acpi_operand_object *region_obj2; 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); } region_obj2 = acpi_ns_get_secondary_object(region_obj); if (!region_obj2) { return_ACPI_STATUS(AE_NOT_EXIST); } node = acpi_ns_get_parent_node(region_obj->region.node); space_id = region_obj->region.space_id; /* Setup defaults */ region_obj->region.handler = NULL; region_obj2->extra.method_REG = NULL; region_obj->common.flags &= ~(AOPOBJ_SETUP_COMPLETE); region_obj->common.flags |= AOPOBJ_OBJECT_INITIALIZED; /* Find any "_REG" method associated with this region definition */ status = acpi_ns_search_node(*reg_name_ptr, node, ACPI_TYPE_METHOD, &method_node); if (ACPI_SUCCESS(status)) { /* * The _REG method is optional and there can be only one per region * definition. This will be executed when the handler is attached * or removed */ region_obj2->extra.method_REG = method_node; } /* * The following loop depends upon the root Node having no parent * ie: acpi_gbl_root_node->parent_entry 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: handler_obj = obj_desc->device.handler; break; case ACPI_TYPE_PROCESSOR: handler_obj = obj_desc->processor.handler; break; case ACPI_TYPE_THERMAL: handler_obj = obj_desc->thermal_zone.handler; break; default: /* Ignore other objects */ break; } while (handler_obj) { /* Is this handler of the correct type? */ if (handler_obj->address_space.space_id == space_id) { /* 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, 1); 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); } /* Try next handler in the list */ handler_obj = handler_obj->address_space.next; } } /* * This node does not have the handler we need; * Pop up one level */ node = acpi_ns_get_parent_node(node); } /* 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); }