cregit-Linux how code gets into the kernel

Release 4.11 drivers/acpi/acpica/dsinit.c

/******************************************************************************
 *
 * Module Name: dsinit - Object initialization namespace walk
 *
 *****************************************************************************/

/*
 * Copyright (C) 2000 - 2017, 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 "acdispat.h"
#include "acnamesp.h"
#include "actables.h"
#include "acinterp.h"


#define _COMPONENT          ACPI_DISPATCHER
ACPI_MODULE_NAME("dsinit")

/* Local prototypes */
static acpi_status
acpi_ds_init_one_object(acpi_handle obj_handle,
			u32 level, void *context, void **return_value);

/*******************************************************************************
 *
 * FUNCTION:    acpi_ds_init_one_object
 *
 * PARAMETERS:  obj_handle      - Node for the object
 *              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) Operation Regions
 *
 ******************************************************************************/


static acpi_status acpi_ds_init_one_object(acpi_handle obj_handle, u32 level, void *context, void **return_value) { struct acpi_init_walk_info *info = (struct acpi_init_walk_info *)context; struct acpi_namespace_node *node = (struct acpi_namespace_node *)obj_handle; acpi_status status; union acpi_operand_object *obj_desc; ACPI_FUNCTION_ENTRY(); /* * We are only interested in NS nodes owned by the table that * was just loaded */ if (node->owner_id != info->owner_id) { return (AE_OK); } info->object_count++; /* And even then, we are only interested in a few object types */ switch (acpi_ns_get_type(obj_handle)) { case ACPI_TYPE_REGION: status = acpi_ds_initialize_region(obj_handle); if (ACPI_FAILURE(status)) { ACPI_EXCEPTION((AE_INFO, status, "During Region initialization %p [%4.4s]", obj_handle, acpi_ut_get_node_name(obj_handle))); } info->op_region_count++; break; case ACPI_TYPE_METHOD: /* * Auto-serialization support. We will examine each method that is * not_serialized to determine if it creates any Named objects. If * it does, it will be marked serialized to prevent problems if * the method is entered by two or more threads and an attempt is * made to create the same named object twice -- which results in * an AE_ALREADY_EXISTS exception and method abort. */ info->method_count++; obj_desc = acpi_ns_get_attached_object(node); if (!obj_desc) { break; } /* Ignore if already serialized */ if (obj_desc->method.info_flags & ACPI_METHOD_SERIALIZED) { info->serial_method_count++; break; } if (acpi_gbl_auto_serialize_methods) { /* Parse/scan method and serialize it if necessary */ acpi_ds_auto_serialize_method(node, obj_desc); if (obj_desc->method. info_flags & ACPI_METHOD_SERIALIZED) { /* Method was just converted to Serialized */ info->serial_method_count++; info->serialized_method_count++; break; } } info->non_serial_method_count++; break; case ACPI_TYPE_DEVICE: info->device_count++; break; default: break; } /* * We ignore errors from above, and always return OK, since * we don't want to abort the walk on a single error. */ return (AE_OK); }

Contributors

PersonTokensPropCommitsCommitProp
Andy Grover11850.00%222.22%
Robert Moore11548.73%666.67%
Len Brown31.27%111.11%
Total236100.00%9100.00%

/******************************************************************************* * * FUNCTION: acpi_ds_initialize_objects * * PARAMETERS: table_desc - Descriptor for parent ACPI table * start_node - Root of subtree to be initialized. * * RETURN: Status * * DESCRIPTION: Walk the namespace starting at "StartNode" and perform any * necessary initialization on the objects found therein * ******************************************************************************/
acpi_status acpi_ds_initialize_objects(u32 table_index, struct acpi_namespace_node *start_node) { acpi_status status; struct acpi_init_walk_info info; struct acpi_table_header *table; acpi_owner_id owner_id; ACPI_FUNCTION_TRACE(ds_initialize_objects); status = acpi_tb_get_owner_id(table_index, &owner_id); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "**** Starting initialization of namespace objects ****\n")); /* Set all init info to zero */ memset(&info, 0, sizeof(struct acpi_init_walk_info)); info.owner_id = owner_id; info.table_index = table_index; /* Walk entire namespace from the supplied root */ /* * We don't use acpi_walk_namespace since we do not want to acquire * the namespace reader lock. */ status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, start_node, ACPI_UINT32_MAX, ACPI_NS_WALK_NO_UNLOCK, acpi_ds_init_one_object, NULL, &info, NULL); if (ACPI_FAILURE(status)) { ACPI_EXCEPTION((AE_INFO, status, "During WalkNamespace")); } status = acpi_get_table_by_index(table_index, &table); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } /* DSDT is always the first AML table */ if (ACPI_COMPARE_NAME(table->signature, ACPI_SIG_DSDT)) { ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, "\nInitializing Namespace objects:\n")); } /* Summary of objects initialized */ ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, "Table [%4.4s: %-8.8s] (id %.2X) - %4u Objects with %3u Devices, " "%3u Regions, %4u Methods (%u/%u/%u Serial/Non/Cvt)\n", table->signature, table->oem_table_id, owner_id, info.object_count, info.device_count, info.op_region_count, info.method_count, info.serial_method_count, info.non_serial_method_count, info.serialized_method_count)); ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "%u Methods, %u Regions\n", info.method_count, info.op_region_count)); return_ACPI_STATUS(AE_OK); }

Contributors

PersonTokensPropCommitsCommitProp
Andy Grover12047.06%317.65%
Robert Moore11846.27%1164.71%
Alexey Y. Starikovskiy145.49%15.88%
Lin Ming20.78%15.88%
Lv Zheng10.39%15.88%
Total255100.00%17100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Robert Moore26148.15%1760.71%
Andy Grover25346.68%414.29%
Alexey Y. Starikovskiy142.58%13.57%
Len Brown71.29%27.14%
Lv Zheng40.74%27.14%
Lin Ming20.37%13.57%
Patrick Mochel10.18%13.57%
Total542100.00%28100.00%
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