195b482a8SLen Brown /****************************************************************************** 295b482a8SLen Brown * 395b482a8SLen Brown * Module Name: nsinit - namespace initialization 495b482a8SLen Brown * 595b482a8SLen Brown *****************************************************************************/ 695b482a8SLen Brown 795b482a8SLen Brown /* 877848130SBob Moore * Copyright (C) 2000 - 2012, Intel Corp. 995b482a8SLen Brown * All rights reserved. 1095b482a8SLen Brown * 1195b482a8SLen Brown * Redistribution and use in source and binary forms, with or without 1295b482a8SLen Brown * modification, are permitted provided that the following conditions 1395b482a8SLen Brown * are met: 1495b482a8SLen Brown * 1. Redistributions of source code must retain the above copyright 1595b482a8SLen Brown * notice, this list of conditions, and the following disclaimer, 1695b482a8SLen Brown * without modification. 1795b482a8SLen Brown * 2. Redistributions in binary form must reproduce at minimum a disclaimer 1895b482a8SLen Brown * substantially similar to the "NO WARRANTY" disclaimer below 1995b482a8SLen Brown * ("Disclaimer") and any redistribution must be conditioned upon 2095b482a8SLen Brown * including a substantially similar Disclaimer requirement for further 2195b482a8SLen Brown * binary redistribution. 2295b482a8SLen Brown * 3. Neither the names of the above-listed copyright holders nor the names 2395b482a8SLen Brown * of any contributors may be used to endorse or promote products derived 2495b482a8SLen Brown * from this software without specific prior written permission. 2595b482a8SLen Brown * 2695b482a8SLen Brown * Alternatively, this software may be distributed under the terms of the 2795b482a8SLen Brown * GNU General Public License ("GPL") version 2 as published by the Free 2895b482a8SLen Brown * Software Foundation. 2995b482a8SLen Brown * 3095b482a8SLen Brown * NO WARRANTY 3195b482a8SLen Brown * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 3295b482a8SLen Brown * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 3395b482a8SLen Brown * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 3495b482a8SLen Brown * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 3595b482a8SLen Brown * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 3695b482a8SLen Brown * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 3795b482a8SLen Brown * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 3895b482a8SLen Brown * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 3995b482a8SLen Brown * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 4095b482a8SLen Brown * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 4195b482a8SLen Brown * POSSIBILITY OF SUCH DAMAGES. 4295b482a8SLen Brown */ 4395b482a8SLen Brown 4495b482a8SLen Brown #include <acpi/acpi.h> 45e2f7a777SLen Brown #include "accommon.h" 46e2f7a777SLen Brown #include "acnamesp.h" 47e2f7a777SLen Brown #include "acdispat.h" 48e2f7a777SLen Brown #include "acinterp.h" 4995b482a8SLen Brown 5095b482a8SLen Brown #define _COMPONENT ACPI_NAMESPACE 5195b482a8SLen Brown ACPI_MODULE_NAME("nsinit") 5295b482a8SLen Brown 5395b482a8SLen Brown /* Local prototypes */ 5495b482a8SLen Brown static acpi_status 5595b482a8SLen Brown acpi_ns_init_one_object(acpi_handle obj_handle, 5695b482a8SLen Brown u32 level, void *context, void **return_value); 5795b482a8SLen Brown 5895b482a8SLen Brown static acpi_status 5995b482a8SLen Brown acpi_ns_init_one_device(acpi_handle obj_handle, 6095b482a8SLen Brown u32 nesting_level, void *context, void **return_value); 6195b482a8SLen Brown 6295b482a8SLen Brown static acpi_status 6395b482a8SLen Brown acpi_ns_find_ini_methods(acpi_handle obj_handle, 6495b482a8SLen Brown u32 nesting_level, void *context, void **return_value); 6595b482a8SLen Brown 6695b482a8SLen Brown /******************************************************************************* 6795b482a8SLen Brown * 6895b482a8SLen Brown * FUNCTION: acpi_ns_initialize_objects 6995b482a8SLen Brown * 7095b482a8SLen Brown * PARAMETERS: None 7195b482a8SLen Brown * 7295b482a8SLen Brown * RETURN: Status 7395b482a8SLen Brown * 7495b482a8SLen Brown * DESCRIPTION: Walk the entire namespace and perform any necessary 7595b482a8SLen Brown * initialization on the objects found therein 7695b482a8SLen Brown * 7795b482a8SLen Brown ******************************************************************************/ 7895b482a8SLen Brown 7995b482a8SLen Brown acpi_status acpi_ns_initialize_objects(void) 8095b482a8SLen Brown { 8195b482a8SLen Brown acpi_status status; 8295b482a8SLen Brown struct acpi_init_walk_info info; 8395b482a8SLen Brown 8495b482a8SLen Brown ACPI_FUNCTION_TRACE(ns_initialize_objects); 8595b482a8SLen Brown 8695b482a8SLen Brown ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, 8795b482a8SLen Brown "**** Starting initialization of namespace objects ****\n")); 8895b482a8SLen Brown ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, 89*2fae3e56SBob Moore "Completing Region/Field/Buffer/Package initialization:\n")); 9095b482a8SLen Brown 9195b482a8SLen Brown /* Set all init info to zero */ 9295b482a8SLen Brown 9395b482a8SLen Brown ACPI_MEMSET(&info, 0, sizeof(struct acpi_init_walk_info)); 9495b482a8SLen Brown 9595b482a8SLen Brown /* Walk entire namespace from the supplied root */ 9695b482a8SLen Brown 9795b482a8SLen Brown status = acpi_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 981f86e8c1SLv Zheng ACPI_UINT32_MAX, acpi_ns_init_one_object, 991f86e8c1SLv Zheng NULL, &info, NULL); 10095b482a8SLen Brown if (ACPI_FAILURE(status)) { 10195b482a8SLen Brown ACPI_EXCEPTION((AE_INFO, status, "During WalkNamespace")); 10295b482a8SLen Brown } 10395b482a8SLen Brown 10495b482a8SLen Brown ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, 105*2fae3e56SBob Moore "Initialized %u/%u Regions %u/%u Fields %u/%u " 10696b7b7adSAlexey Starikovskiy "Buffers %u/%u Packages (%u nodes)\n", 10795b482a8SLen Brown info.op_region_init, info.op_region_count, 10895b482a8SLen Brown info.field_init, info.field_count, 10995b482a8SLen Brown info.buffer_init, info.buffer_count, 11095b482a8SLen Brown info.package_init, info.package_count, 11195b482a8SLen Brown info.object_count)); 11295b482a8SLen Brown 11395b482a8SLen Brown ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, 11496b7b7adSAlexey Starikovskiy "%u Control Methods found\n", info.method_count)); 11595b482a8SLen Brown ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, 11696b7b7adSAlexey Starikovskiy "%u Op Regions found\n", info.op_region_count)); 11795b482a8SLen Brown 11895b482a8SLen Brown return_ACPI_STATUS(AE_OK); 11995b482a8SLen Brown } 12095b482a8SLen Brown 12195b482a8SLen Brown /******************************************************************************* 12295b482a8SLen Brown * 12395b482a8SLen Brown * FUNCTION: acpi_ns_initialize_devices 12495b482a8SLen Brown * 12595b482a8SLen Brown * PARAMETERS: None 12695b482a8SLen Brown * 12795b482a8SLen Brown * RETURN: acpi_status 12895b482a8SLen Brown * 12995b482a8SLen Brown * DESCRIPTION: Walk the entire namespace and initialize all ACPI devices. 13095b482a8SLen Brown * This means running _INI on all present devices. 13195b482a8SLen Brown * 13295b482a8SLen Brown * Note: We install PCI config space handler on region access, 13395b482a8SLen Brown * not here. 13495b482a8SLen Brown * 13595b482a8SLen Brown ******************************************************************************/ 13695b482a8SLen Brown 13795b482a8SLen Brown acpi_status acpi_ns_initialize_devices(void) 13895b482a8SLen Brown { 13995b482a8SLen Brown acpi_status status; 14095b482a8SLen Brown struct acpi_device_walk_info info; 14195b482a8SLen Brown 14295b482a8SLen Brown ACPI_FUNCTION_TRACE(ns_initialize_devices); 14395b482a8SLen Brown 14495b482a8SLen Brown /* Init counters */ 14595b482a8SLen Brown 14695b482a8SLen Brown info.device_count = 0; 14795b482a8SLen Brown info.num_STA = 0; 14895b482a8SLen Brown info.num_INI = 0; 14995b482a8SLen Brown 15095b482a8SLen Brown ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, 151d4913dc6SBob Moore "Initializing Device/Processor/Thermal objects " 152*2fae3e56SBob Moore "and executing _INI methods:\n")); 15395b482a8SLen Brown 15495b482a8SLen Brown /* Tree analysis: find all subtrees that contain _INI methods */ 15595b482a8SLen Brown 15695b482a8SLen Brown status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 15795b482a8SLen Brown ACPI_UINT32_MAX, FALSE, 1582263576cSLin Ming acpi_ns_find_ini_methods, NULL, &info, 1592263576cSLin Ming NULL); 16095b482a8SLen Brown if (ACPI_FAILURE(status)) { 16195b482a8SLen Brown goto error_exit; 16295b482a8SLen Brown } 16395b482a8SLen Brown 16495b482a8SLen Brown /* Allocate the evaluation information block */ 16595b482a8SLen Brown 16695b482a8SLen Brown info.evaluate_info = 16795b482a8SLen Brown ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info)); 16895b482a8SLen Brown if (!info.evaluate_info) { 16995b482a8SLen Brown status = AE_NO_MEMORY; 17095b482a8SLen Brown goto error_exit; 17195b482a8SLen Brown } 17295b482a8SLen Brown 1739e64155eSBob Moore /* 1749e64155eSBob Moore * Execute the "global" _INI method that may appear at the root. This 1759e64155eSBob Moore * support is provided for Windows compatibility (Vista+) and is not 1769e64155eSBob Moore * part of the ACPI specification. 1779e64155eSBob Moore */ 1789e64155eSBob Moore info.evaluate_info->prefix_node = acpi_gbl_root_node; 1799e64155eSBob Moore info.evaluate_info->pathname = METHOD_NAME__INI; 1809e64155eSBob Moore info.evaluate_info->parameters = NULL; 1819e64155eSBob Moore info.evaluate_info->flags = ACPI_IGNORE_RETURN_VALUE; 1829e64155eSBob Moore 1839e64155eSBob Moore status = acpi_ns_evaluate(info.evaluate_info); 1849e64155eSBob Moore if (ACPI_SUCCESS(status)) { 1859e64155eSBob Moore info.num_INI++; 1869e64155eSBob Moore } 1879e64155eSBob Moore 18895b482a8SLen Brown /* Walk namespace to execute all _INIs on present devices */ 18995b482a8SLen Brown 19095b482a8SLen Brown status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 19195b482a8SLen Brown ACPI_UINT32_MAX, FALSE, 1922263576cSLin Ming acpi_ns_init_one_device, NULL, &info, 1932263576cSLin Ming NULL); 19495b482a8SLen Brown 195b681f7d9SMatthew Garrett /* 196b681f7d9SMatthew Garrett * Any _OSI requests should be completed by now. If the BIOS has 197b681f7d9SMatthew Garrett * requested any Windows OSI strings, we will always truncate 198b681f7d9SMatthew Garrett * I/O addresses to 16 bits -- for Windows compatibility. 199b681f7d9SMatthew Garrett */ 200b681f7d9SMatthew Garrett if (acpi_gbl_osi_data >= ACPI_OSI_WIN_2000) { 201b681f7d9SMatthew Garrett acpi_gbl_truncate_io_addresses = TRUE; 202b681f7d9SMatthew Garrett } 203b681f7d9SMatthew Garrett 20495b482a8SLen Brown ACPI_FREE(info.evaluate_info); 20595b482a8SLen Brown if (ACPI_FAILURE(status)) { 20695b482a8SLen Brown goto error_exit; 20795b482a8SLen Brown } 20895b482a8SLen Brown 20995b482a8SLen Brown ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, 210*2fae3e56SBob Moore "Executed %u _INI methods requiring %u _STA executions " 2115821f754SBob Moore "(examined %u objects)\n", 21295b482a8SLen Brown info.num_INI, info.num_STA, info.device_count)); 21395b482a8SLen Brown 21495b482a8SLen Brown return_ACPI_STATUS(status); 21595b482a8SLen Brown 21695b482a8SLen Brown error_exit: 21795b482a8SLen Brown ACPI_EXCEPTION((AE_INFO, status, "During device initialization")); 21895b482a8SLen Brown return_ACPI_STATUS(status); 21995b482a8SLen Brown } 22095b482a8SLen Brown 22195b482a8SLen Brown /******************************************************************************* 22295b482a8SLen Brown * 22395b482a8SLen Brown * FUNCTION: acpi_ns_init_one_object 22495b482a8SLen Brown * 22595b482a8SLen Brown * PARAMETERS: obj_handle - Node 226ba494beeSBob Moore * level - Current nesting level 227ba494beeSBob Moore * context - Points to a init info struct 22895b482a8SLen Brown * return_value - Not used 22995b482a8SLen Brown * 23095b482a8SLen Brown * RETURN: Status 23195b482a8SLen Brown * 23295b482a8SLen Brown * DESCRIPTION: Callback from acpi_walk_namespace. Invoked for every object 23395b482a8SLen Brown * within the namespace. 23495b482a8SLen Brown * 23595b482a8SLen Brown * Currently, the only objects that require initialization are: 23695b482a8SLen Brown * 1) Methods 23795b482a8SLen Brown * 2) Op Regions 23895b482a8SLen Brown * 23995b482a8SLen Brown ******************************************************************************/ 24095b482a8SLen Brown 24195b482a8SLen Brown static acpi_status 24295b482a8SLen Brown acpi_ns_init_one_object(acpi_handle obj_handle, 24395b482a8SLen Brown u32 level, void *context, void **return_value) 24495b482a8SLen Brown { 24595b482a8SLen Brown acpi_object_type type; 24695b482a8SLen Brown acpi_status status = AE_OK; 24795b482a8SLen Brown struct acpi_init_walk_info *info = 24895b482a8SLen Brown (struct acpi_init_walk_info *)context; 24995b482a8SLen Brown struct acpi_namespace_node *node = 25095b482a8SLen Brown (struct acpi_namespace_node *)obj_handle; 25195b482a8SLen Brown union acpi_operand_object *obj_desc; 25295b482a8SLen Brown 25395b482a8SLen Brown ACPI_FUNCTION_NAME(ns_init_one_object); 25495b482a8SLen Brown 25595b482a8SLen Brown info->object_count++; 25695b482a8SLen Brown 25795b482a8SLen Brown /* And even then, we are only interested in a few object types */ 25895b482a8SLen Brown 25995b482a8SLen Brown type = acpi_ns_get_type(obj_handle); 26095b482a8SLen Brown obj_desc = acpi_ns_get_attached_object(node); 26195b482a8SLen Brown if (!obj_desc) { 26295b482a8SLen Brown return (AE_OK); 26395b482a8SLen Brown } 26495b482a8SLen Brown 26595b482a8SLen Brown /* Increment counters for object types we are looking for */ 26695b482a8SLen Brown 26795b482a8SLen Brown switch (type) { 26895b482a8SLen Brown case ACPI_TYPE_REGION: 26995b482a8SLen Brown info->op_region_count++; 27095b482a8SLen Brown break; 27195b482a8SLen Brown 27295b482a8SLen Brown case ACPI_TYPE_BUFFER_FIELD: 27395b482a8SLen Brown info->field_count++; 27495b482a8SLen Brown break; 27595b482a8SLen Brown 27695b482a8SLen Brown case ACPI_TYPE_LOCAL_BANK_FIELD: 27795b482a8SLen Brown info->field_count++; 27895b482a8SLen Brown break; 27995b482a8SLen Brown 28095b482a8SLen Brown case ACPI_TYPE_BUFFER: 28195b482a8SLen Brown info->buffer_count++; 28295b482a8SLen Brown break; 28395b482a8SLen Brown 28495b482a8SLen Brown case ACPI_TYPE_PACKAGE: 28595b482a8SLen Brown info->package_count++; 28695b482a8SLen Brown break; 28795b482a8SLen Brown 28895b482a8SLen Brown default: 28995b482a8SLen Brown 29095b482a8SLen Brown /* No init required, just exit now */ 29195b482a8SLen Brown return (AE_OK); 29295b482a8SLen Brown } 29395b482a8SLen Brown 294d4913dc6SBob Moore /* If the object is already initialized, nothing else to do */ 295d4913dc6SBob Moore 29695b482a8SLen Brown if (obj_desc->common.flags & AOPOBJ_DATA_VALID) { 29795b482a8SLen Brown return (AE_OK); 29895b482a8SLen Brown } 29995b482a8SLen Brown 300d4913dc6SBob Moore /* Must lock the interpreter before executing AML code */ 301d4913dc6SBob Moore 30295b482a8SLen Brown acpi_ex_enter_interpreter(); 30395b482a8SLen Brown 30495b482a8SLen Brown /* 30595b482a8SLen Brown * Each of these types can contain executable AML code within the 30695b482a8SLen Brown * declaration. 30795b482a8SLen Brown */ 30895b482a8SLen Brown switch (type) { 30995b482a8SLen Brown case ACPI_TYPE_REGION: 31095b482a8SLen Brown 31195b482a8SLen Brown info->op_region_init++; 31295b482a8SLen Brown status = acpi_ds_get_region_arguments(obj_desc); 31395b482a8SLen Brown break; 31495b482a8SLen Brown 31595b482a8SLen Brown case ACPI_TYPE_BUFFER_FIELD: 31695b482a8SLen Brown 31795b482a8SLen Brown info->field_init++; 31895b482a8SLen Brown status = acpi_ds_get_buffer_field_arguments(obj_desc); 31995b482a8SLen Brown break; 32095b482a8SLen Brown 32195b482a8SLen Brown case ACPI_TYPE_LOCAL_BANK_FIELD: 32295b482a8SLen Brown 32395b482a8SLen Brown info->field_init++; 32495b482a8SLen Brown status = acpi_ds_get_bank_field_arguments(obj_desc); 32595b482a8SLen Brown break; 32695b482a8SLen Brown 32795b482a8SLen Brown case ACPI_TYPE_BUFFER: 32895b482a8SLen Brown 32995b482a8SLen Brown info->buffer_init++; 33095b482a8SLen Brown status = acpi_ds_get_buffer_arguments(obj_desc); 33195b482a8SLen Brown break; 33295b482a8SLen Brown 33395b482a8SLen Brown case ACPI_TYPE_PACKAGE: 33495b482a8SLen Brown 33595b482a8SLen Brown info->package_init++; 33695b482a8SLen Brown status = acpi_ds_get_package_arguments(obj_desc); 33795b482a8SLen Brown break; 33895b482a8SLen Brown 33995b482a8SLen Brown default: 34095b482a8SLen Brown /* No other types can get here */ 34195b482a8SLen Brown break; 34295b482a8SLen Brown } 34395b482a8SLen Brown 34495b482a8SLen Brown if (ACPI_FAILURE(status)) { 34595b482a8SLen Brown ACPI_EXCEPTION((AE_INFO, status, 34695b482a8SLen Brown "Could not execute arguments for [%4.4s] (%s)", 34795b482a8SLen Brown acpi_ut_get_node_name(node), 34895b482a8SLen Brown acpi_ut_get_type_name(type))); 34995b482a8SLen Brown } 35095b482a8SLen Brown 35195b482a8SLen Brown /* 35295b482a8SLen Brown * We ignore errors from above, and always return OK, since we don't want 35395b482a8SLen Brown * to abort the walk on any single error. 35495b482a8SLen Brown */ 35595b482a8SLen Brown acpi_ex_exit_interpreter(); 35695b482a8SLen Brown return (AE_OK); 35795b482a8SLen Brown } 35895b482a8SLen Brown 35995b482a8SLen Brown /******************************************************************************* 36095b482a8SLen Brown * 36195b482a8SLen Brown * FUNCTION: acpi_ns_find_ini_methods 36295b482a8SLen Brown * 36395b482a8SLen Brown * PARAMETERS: acpi_walk_callback 36495b482a8SLen Brown * 36595b482a8SLen Brown * RETURN: acpi_status 36695b482a8SLen Brown * 36795b482a8SLen Brown * DESCRIPTION: Called during namespace walk. Finds objects named _INI under 36895b482a8SLen Brown * device/processor/thermal objects, and marks the entire subtree 36995b482a8SLen Brown * with a SUBTREE_HAS_INI flag. This flag is used during the 37095b482a8SLen Brown * subsequent device initialization walk to avoid entire subtrees 37195b482a8SLen Brown * that do not contain an _INI. 37295b482a8SLen Brown * 37395b482a8SLen Brown ******************************************************************************/ 37495b482a8SLen Brown 37595b482a8SLen Brown static acpi_status 37695b482a8SLen Brown acpi_ns_find_ini_methods(acpi_handle obj_handle, 37795b482a8SLen Brown u32 nesting_level, void *context, void **return_value) 37895b482a8SLen Brown { 37995b482a8SLen Brown struct acpi_device_walk_info *info = 38095b482a8SLen Brown ACPI_CAST_PTR(struct acpi_device_walk_info, context); 38195b482a8SLen Brown struct acpi_namespace_node *node; 38295b482a8SLen Brown struct acpi_namespace_node *parent_node; 38395b482a8SLen Brown 38495b482a8SLen Brown /* Keep count of device/processor/thermal objects */ 38595b482a8SLen Brown 38695b482a8SLen Brown node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_handle); 38795b482a8SLen Brown if ((node->type == ACPI_TYPE_DEVICE) || 38895b482a8SLen Brown (node->type == ACPI_TYPE_PROCESSOR) || 38995b482a8SLen Brown (node->type == ACPI_TYPE_THERMAL)) { 39095b482a8SLen Brown info->device_count++; 39195b482a8SLen Brown return (AE_OK); 39295b482a8SLen Brown } 39395b482a8SLen Brown 39495b482a8SLen Brown /* We are only looking for methods named _INI */ 39595b482a8SLen Brown 39695b482a8SLen Brown if (!ACPI_COMPARE_NAME(node->name.ascii, METHOD_NAME__INI)) { 39795b482a8SLen Brown return (AE_OK); 39895b482a8SLen Brown } 39995b482a8SLen Brown 40095b482a8SLen Brown /* 40195b482a8SLen Brown * The only _INI methods that we care about are those that are 40295b482a8SLen Brown * present under Device, Processor, and Thermal objects. 40395b482a8SLen Brown */ 404c45b5c09SAlexey Starikovskiy parent_node = node->parent; 40595b482a8SLen Brown switch (parent_node->type) { 40695b482a8SLen Brown case ACPI_TYPE_DEVICE: 40795b482a8SLen Brown case ACPI_TYPE_PROCESSOR: 40895b482a8SLen Brown case ACPI_TYPE_THERMAL: 40995b482a8SLen Brown 41095b482a8SLen Brown /* Mark parent and bubble up the INI present flag to the root */ 41195b482a8SLen Brown 41295b482a8SLen Brown while (parent_node) { 41395b482a8SLen Brown parent_node->flags |= ANOBJ_SUBTREE_HAS_INI; 414c45b5c09SAlexey Starikovskiy parent_node = parent_node->parent; 41595b482a8SLen Brown } 41695b482a8SLen Brown break; 41795b482a8SLen Brown 41895b482a8SLen Brown default: 41995b482a8SLen Brown break; 42095b482a8SLen Brown } 42195b482a8SLen Brown 42295b482a8SLen Brown return (AE_OK); 42395b482a8SLen Brown } 42495b482a8SLen Brown 42595b482a8SLen Brown /******************************************************************************* 42695b482a8SLen Brown * 42795b482a8SLen Brown * FUNCTION: acpi_ns_init_one_device 42895b482a8SLen Brown * 42995b482a8SLen Brown * PARAMETERS: acpi_walk_callback 43095b482a8SLen Brown * 43195b482a8SLen Brown * RETURN: acpi_status 43295b482a8SLen Brown * 43395b482a8SLen Brown * DESCRIPTION: This is called once per device soon after ACPI is enabled 43495b482a8SLen Brown * to initialize each device. It determines if the device is 43595b482a8SLen Brown * present, and if so, calls _INI. 43695b482a8SLen Brown * 43795b482a8SLen Brown ******************************************************************************/ 43895b482a8SLen Brown 43995b482a8SLen Brown static acpi_status 44095b482a8SLen Brown acpi_ns_init_one_device(acpi_handle obj_handle, 44195b482a8SLen Brown u32 nesting_level, void *context, void **return_value) 44295b482a8SLen Brown { 44395b482a8SLen Brown struct acpi_device_walk_info *walk_info = 44495b482a8SLen Brown ACPI_CAST_PTR(struct acpi_device_walk_info, context); 44595b482a8SLen Brown struct acpi_evaluate_info *info = walk_info->evaluate_info; 44695b482a8SLen Brown u32 flags; 44795b482a8SLen Brown acpi_status status; 44895b482a8SLen Brown struct acpi_namespace_node *device_node; 44995b482a8SLen Brown 45095b482a8SLen Brown ACPI_FUNCTION_TRACE(ns_init_one_device); 45195b482a8SLen Brown 45295b482a8SLen Brown /* We are interested in Devices, Processors and thermal_zones only */ 45395b482a8SLen Brown 45495b482a8SLen Brown device_node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_handle); 45595b482a8SLen Brown if ((device_node->type != ACPI_TYPE_DEVICE) && 45695b482a8SLen Brown (device_node->type != ACPI_TYPE_PROCESSOR) && 45795b482a8SLen Brown (device_node->type != ACPI_TYPE_THERMAL)) { 45895b482a8SLen Brown return_ACPI_STATUS(AE_OK); 45995b482a8SLen Brown } 46095b482a8SLen Brown 46195b482a8SLen Brown /* 46295b482a8SLen Brown * Because of an earlier namespace analysis, all subtrees that contain an 46395b482a8SLen Brown * _INI method are tagged. 46495b482a8SLen Brown * 46595b482a8SLen Brown * If this device subtree does not contain any _INI methods, we 46695b482a8SLen Brown * can exit now and stop traversing this entire subtree. 46795b482a8SLen Brown */ 46895b482a8SLen Brown if (!(device_node->flags & ANOBJ_SUBTREE_HAS_INI)) { 46995b482a8SLen Brown return_ACPI_STATUS(AE_CTRL_DEPTH); 47095b482a8SLen Brown } 47195b482a8SLen Brown 47295b482a8SLen Brown /* 47395b482a8SLen Brown * Run _STA to determine if this device is present and functioning. We 47495b482a8SLen Brown * must know this information for two important reasons (from ACPI spec): 47595b482a8SLen Brown * 47695b482a8SLen Brown * 1) We can only run _INI if the device is present. 47795b482a8SLen Brown * 2) We must abort the device tree walk on this subtree if the device is 47895b482a8SLen Brown * not present and is not functional (we will not examine the children) 47995b482a8SLen Brown * 48095b482a8SLen Brown * The _STA method is not required to be present under the device, we 48195b482a8SLen Brown * assume the device is present if _STA does not exist. 48295b482a8SLen Brown */ 48395b482a8SLen Brown ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname 48495b482a8SLen Brown (ACPI_TYPE_METHOD, device_node, METHOD_NAME__STA)); 48595b482a8SLen Brown 48695b482a8SLen Brown status = acpi_ut_execute_STA(device_node, &flags); 48795b482a8SLen Brown if (ACPI_FAILURE(status)) { 48895b482a8SLen Brown 48995b482a8SLen Brown /* Ignore error and move on to next device */ 49095b482a8SLen Brown 49195b482a8SLen Brown return_ACPI_STATUS(AE_OK); 49295b482a8SLen Brown } 49395b482a8SLen Brown 49495b482a8SLen Brown /* 49595b482a8SLen Brown * Flags == -1 means that _STA was not found. In this case, we assume that 49695b482a8SLen Brown * the device is both present and functional. 49795b482a8SLen Brown * 49895b482a8SLen Brown * From the ACPI spec, description of _STA: 49995b482a8SLen Brown * 50095b482a8SLen Brown * "If a device object (including the processor object) does not have an 50195b482a8SLen Brown * _STA object, then OSPM assumes that all of the above bits are set (in 50295b482a8SLen Brown * other words, the device is present, ..., and functioning)" 50395b482a8SLen Brown */ 50495b482a8SLen Brown if (flags != ACPI_UINT32_MAX) { 50595b482a8SLen Brown walk_info->num_STA++; 50695b482a8SLen Brown } 50795b482a8SLen Brown 50895b482a8SLen Brown /* 50995b482a8SLen Brown * Examine the PRESENT and FUNCTIONING status bits 51095b482a8SLen Brown * 51195b482a8SLen Brown * Note: ACPI spec does not seem to specify behavior for the present but 51295b482a8SLen Brown * not functioning case, so we assume functioning if present. 51395b482a8SLen Brown */ 51495b482a8SLen Brown if (!(flags & ACPI_STA_DEVICE_PRESENT)) { 51595b482a8SLen Brown 51695b482a8SLen Brown /* Device is not present, we must examine the Functioning bit */ 51795b482a8SLen Brown 51895b482a8SLen Brown if (flags & ACPI_STA_DEVICE_FUNCTIONING) { 51995b482a8SLen Brown /* 52095b482a8SLen Brown * Device is not present but is "functioning". In this case, 52195b482a8SLen Brown * we will not run _INI, but we continue to examine the children 52295b482a8SLen Brown * of this device. 52395b482a8SLen Brown * 524ba494beeSBob Moore * From the ACPI spec, description of _STA: (note - no mention 52595b482a8SLen Brown * of whether to run _INI or not on the device in question) 52695b482a8SLen Brown * 52795b482a8SLen Brown * "_STA may return bit 0 clear (not present) with bit 3 set 52895b482a8SLen Brown * (device is functional). This case is used to indicate a valid 52995b482a8SLen Brown * device for which no device driver should be loaded (for example, 53095b482a8SLen Brown * a bridge device.) Children of this device may be present and 53195b482a8SLen Brown * valid. OSPM should continue enumeration below a device whose 53295b482a8SLen Brown * _STA returns this bit combination" 53395b482a8SLen Brown */ 53495b482a8SLen Brown return_ACPI_STATUS(AE_OK); 53595b482a8SLen Brown } else { 53695b482a8SLen Brown /* 53795b482a8SLen Brown * Device is not present and is not functioning. We must abort the 53895b482a8SLen Brown * walk of this subtree immediately -- don't look at the children 53995b482a8SLen Brown * of such a device. 54095b482a8SLen Brown * 54195b482a8SLen Brown * From the ACPI spec, description of _INI: 54295b482a8SLen Brown * 54395b482a8SLen Brown * "If the _STA method indicates that the device is not present, 54495b482a8SLen Brown * OSPM will not run the _INI and will not examine the children 54595b482a8SLen Brown * of the device for _INI methods" 54695b482a8SLen Brown */ 54795b482a8SLen Brown return_ACPI_STATUS(AE_CTRL_DEPTH); 54895b482a8SLen Brown } 54995b482a8SLen Brown } 55095b482a8SLen Brown 55195b482a8SLen Brown /* 55295b482a8SLen Brown * The device is present or is assumed present if no _STA exists. 55395b482a8SLen Brown * Run the _INI if it exists (not required to exist) 55495b482a8SLen Brown * 55595b482a8SLen Brown * Note: We know there is an _INI within this subtree, but it may not be 55695b482a8SLen Brown * under this particular device, it may be lower in the branch. 55795b482a8SLen Brown */ 55895b482a8SLen Brown ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname 55995b482a8SLen Brown (ACPI_TYPE_METHOD, device_node, METHOD_NAME__INI)); 56095b482a8SLen Brown 56195b482a8SLen Brown info->prefix_node = device_node; 56295b482a8SLen Brown info->pathname = METHOD_NAME__INI; 56395b482a8SLen Brown info->parameters = NULL; 56495b482a8SLen Brown info->flags = ACPI_IGNORE_RETURN_VALUE; 56595b482a8SLen Brown 56695b482a8SLen Brown status = acpi_ns_evaluate(info); 56795b482a8SLen Brown 56895b482a8SLen Brown if (ACPI_SUCCESS(status)) { 56995b482a8SLen Brown walk_info->num_INI++; 57095b482a8SLen Brown } 57195b482a8SLen Brown #ifdef ACPI_DEBUG_OUTPUT 57295b482a8SLen Brown else if (status != AE_NOT_FOUND) { 57395b482a8SLen Brown 57495b482a8SLen Brown /* Ignore error and move on to next device */ 57595b482a8SLen Brown 57695b482a8SLen Brown char *scope_name = 57795b482a8SLen Brown acpi_ns_get_external_pathname(info->resolved_node); 57895b482a8SLen Brown 57995b482a8SLen Brown ACPI_EXCEPTION((AE_INFO, status, "during %s._INI execution", 58095b482a8SLen Brown scope_name)); 58195b482a8SLen Brown ACPI_FREE(scope_name); 58295b482a8SLen Brown } 58395b482a8SLen Brown #endif 58495b482a8SLen Brown 58595b482a8SLen Brown /* Ignore errors from above */ 58695b482a8SLen Brown 58795b482a8SLen Brown status = AE_OK; 58895b482a8SLen Brown 58995b482a8SLen Brown /* 59095b482a8SLen Brown * The _INI method has been run if present; call the Global Initialization 59195b482a8SLen Brown * Handler for this device. 59295b482a8SLen Brown */ 59395b482a8SLen Brown if (acpi_gbl_init_handler) { 59495b482a8SLen Brown status = 59595b482a8SLen Brown acpi_gbl_init_handler(device_node, ACPI_INIT_DEVICE_INI); 59695b482a8SLen Brown } 59795b482a8SLen Brown 59895b482a8SLen Brown return_ACPI_STATUS(status); 59995b482a8SLen Brown } 600