| /****************************************************************************** |
| * |
| * 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); |
| } |