/****************************************************************************** * * Module Name: nsinit - namespace initialization * *****************************************************************************/ /* * 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 <acpi/acpi.h> #include <acpi/acnamesp.h> #include <acpi/acdispat.h> #include <acpi/acinterp.h> #define _COMPONENT ACPI_NAMESPACE ACPI_MODULE_NAME("nsinit") /* Local prototypes */ static acpi_status acpi_ns_init_one_object(acpi_handle obj_handle, u32 level, void *context, void **return_value); static acpi_status acpi_ns_init_one_device(acpi_handle obj_handle, u32 nesting_level, void *context, void **return_value); /******************************************************************************* * * FUNCTION: acpi_ns_initialize_objects * * PARAMETERS: None * * RETURN: Status * * DESCRIPTION: Walk the entire namespace and perform any necessary * initialization on the objects found therein * ******************************************************************************/ acpi_status acpi_ns_initialize_objects(void) { acpi_status status; struct acpi_init_walk_info info; ACPI_FUNCTION_TRACE("ns_initialize_objects"); ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "**** Starting initialization of namespace objects ****\n")); ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, "Completing Region/Field/Buffer/Package initialization:")); /* Set all init info to zero */ ACPI_MEMSET(&info, 0, sizeof(struct acpi_init_walk_info)); /* Walk entire namespace from the supplied root */ status = acpi_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, ACPI_UINT32_MAX, acpi_ns_init_one_object, &info, NULL); if (ACPI_FAILURE(status)) { ACPI_EXCEPTION((AE_INFO, status, "During walk_namespace")); } ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, "\nInitialized %hd/%hd Regions %hd/%hd Fields %hd/%hd Buffers %hd/%hd Packages (%hd nodes)\n", info.op_region_init, info.op_region_count, info.field_init, info.field_count, info.buffer_init, info.buffer_count, info.package_init, info.package_count, info.object_count)); ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "%hd Control Methods found\n", info.method_count)); ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "%hd Op Regions found\n", info.op_region_count)); return_ACPI_STATUS(AE_OK); } /******************************************************************************* * * FUNCTION: acpi_ns_initialize_devices * * PARAMETERS: None * * RETURN: acpi_status * * DESCRIPTION: Walk the entire namespace and initialize all ACPI devices. * This means running _INI on all present devices. * * Note: We install PCI config space handler on region access, * not here. * ******************************************************************************/ acpi_status acpi_ns_initialize_devices(void) { acpi_status status; struct acpi_device_walk_info info; ACPI_FUNCTION_TRACE("ns_initialize_devices"); /* Init counters */ info.device_count = 0; info.num_STA = 0; info.num_INI = 0; ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, "Executing all Device _STA and_INI methods:")); status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } /* Walk namespace for all objects */ status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, ACPI_UINT32_MAX, TRUE, acpi_ns_init_one_device, &info, NULL); (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); if (ACPI_FAILURE(status)) { ACPI_EXCEPTION((AE_INFO, status, "During walk_namespace")); } ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, "\n%hd Devices found - executed %hd _STA, %hd _INI methods\n", info.device_count, info.num_STA, info.num_INI)); return_ACPI_STATUS(status); } /******************************************************************************* * * FUNCTION: acpi_ns_init_one_object * * PARAMETERS: obj_handle - Node * Level - Current nesting level * Context - Points to a init info struct * return_value - Not used * * RETURN: Status * * DESCRIPTION: Callback from acpi_walk_namespace. Invoked for every object * within the namespace. * * Currently, the only objects that require initialization are: * 1) Methods * 2) Op Regions * ******************************************************************************/ static acpi_status acpi_ns_init_one_object(acpi_handle obj_handle, u32 level, void *context, void **return_value) { acpi_object_type type; acpi_status status; struct acpi_init_walk_info *info = (struct acpi_init_walk_info *)context; struct acpi_namespace_node *node = (struct acpi_namespace_node *)obj_handle; union acpi_operand_object *obj_desc; ACPI_FUNCTION_NAME("ns_init_one_object"); info->object_count++; /* And even then, we are only interested in a few object types */ type = acpi_ns_get_type(obj_handle); obj_desc = acpi_ns_get_attached_object(node); if (!obj_desc) { return (AE_OK); } /* Increment counters for object types we are looking for */ switch (type) { case ACPI_TYPE_REGION: info->op_region_count++; break; case ACPI_TYPE_BUFFER_FIELD: info->field_count++; break; case ACPI_TYPE_BUFFER: info->buffer_count++; break; case ACPI_TYPE_PACKAGE: info->package_count++; break; default: /* No init required, just exit now */ return (AE_OK); } /* * If the object is already initialized, nothing else to do */ if (obj_desc->common.flags & AOPOBJ_DATA_VALID) { return (AE_OK); } /* * Must lock the interpreter before executing AML code */ status = acpi_ex_enter_interpreter(); if (ACPI_FAILURE(status)) { return (status); } /* * Each of these types can contain executable AML code within the * declaration. */ switch (type) { case ACPI_TYPE_REGION: info->op_region_init++; status = acpi_ds_get_region_arguments(obj_desc); break; case ACPI_TYPE_BUFFER_FIELD: info->field_init++; status = acpi_ds_get_buffer_field_arguments(obj_desc); break; case ACPI_TYPE_BUFFER: info->buffer_init++; status = acpi_ds_get_buffer_arguments(obj_desc); break; case ACPI_TYPE_PACKAGE: info->package_init++; status = acpi_ds_get_package_arguments(obj_desc); break; default: /* No other types can get here */ break; } if (ACPI_FAILURE(status)) { ACPI_EXCEPTION((AE_INFO, status, "Could not execute arguments for [%4.4s] (%s)", acpi_ut_get_node_name(node), acpi_ut_get_type_name(type))); } /* * Print a dot for each object unless we are going to print the entire * pathname */ if (!(acpi_dbg_level & ACPI_LV_INIT_NAMES)) { ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, ".")); } /* * We ignore errors from above, and always return OK, since we don't want * to abort the walk on any single error. */ acpi_ex_exit_interpreter(); return (AE_OK); } /******************************************************************************* * * FUNCTION: acpi_ns_init_one_device * * PARAMETERS: acpi_walk_callback * * RETURN: acpi_status * * DESCRIPTION: This is called once per device soon after ACPI is enabled * to initialize each device. It determines if the device is * present, and if so, calls _INI. * ******************************************************************************/ static acpi_status acpi_ns_init_one_device(acpi_handle obj_handle, u32 nesting_level, void *context, void **return_value) { struct acpi_device_walk_info *info = (struct acpi_device_walk_info *)context; struct acpi_parameter_info pinfo; u32 flags; acpi_status status; struct acpi_namespace_node *ini_node; struct acpi_namespace_node *device_node; ACPI_FUNCTION_TRACE("ns_init_one_device"); device_node = acpi_ns_map_handle_to_node(obj_handle); if (!device_node) { return_ACPI_STATUS(AE_BAD_PARAMETER); } /* * We will run _STA/_INI on Devices, Processors and thermal_zones only */ if ((device_node->type != ACPI_TYPE_DEVICE) && (device_node->type != ACPI_TYPE_PROCESSOR) && (device_node->type != ACPI_TYPE_THERMAL)) { return_ACPI_STATUS(AE_OK); } if ((acpi_dbg_level <= ACPI_LV_ALL_EXCEPTIONS) && (!(acpi_dbg_level & ACPI_LV_INFO))) { ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, ".")); } info->device_count++; /* * Check if the _INI method exists for this device - * if _INI does not exist, there is no need to run _STA * No _INI means device requires no initialization */ status = acpi_ns_search_node(*ACPI_CAST_PTR(u32, METHOD_NAME__INI), device_node, ACPI_TYPE_METHOD, &ini_node); if (ACPI_FAILURE(status)) { /* No _INI method found - move on to next device */ return_ACPI_STATUS(AE_OK); } /* * Run _STA to determine if we can run _INI on the device - * the device must be present before _INI can be run. * However, _STA is not required - assume device present if no _STA */ ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname(ACPI_TYPE_METHOD, device_node, METHOD_NAME__STA)); pinfo.node = device_node; pinfo.parameters = NULL; pinfo.parameter_type = ACPI_PARAM_ARGS; status = acpi_ut_execute_STA(pinfo.node, &flags); if (ACPI_FAILURE(status)) { /* Ignore error and move on to next device */ return_ACPI_STATUS(AE_OK); } if (flags != ACPI_UINT32_MAX) { info->num_STA++; } if (!(flags & ACPI_STA_DEVICE_PRESENT)) { /* Don't look at children of a not present device */ return_ACPI_STATUS(AE_CTRL_DEPTH); } /* * The device is present and _INI exists. Run the _INI method. * (We already have the _INI node from above) */ ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname(ACPI_TYPE_METHOD, pinfo.node, METHOD_NAME__INI)); pinfo.node = ini_node; status = acpi_ns_evaluate_by_handle(&pinfo); if (ACPI_FAILURE(status)) { /* Ignore error and move on to next device */ #ifdef ACPI_DEBUG_OUTPUT char *scope_name = acpi_ns_get_external_pathname(ini_node); ACPI_WARNING((AE_INFO, "%s._INI failed: %s", scope_name, acpi_format_exception(status))); ACPI_MEM_FREE(scope_name); #endif } else { /* Delete any return object (especially if implicit_return is enabled) */ if (pinfo.return_object) { acpi_ut_remove_reference(pinfo.return_object); } /* Count of successful INIs */ info->num_INI++; } if (acpi_gbl_init_handler) { /* External initialization handler is present, call it */ status = acpi_gbl_init_handler(pinfo.node, ACPI_INIT_DEVICE_INI); } return_ACPI_STATUS(AE_OK); }