dsinit.c

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

/*
 * Copyright (C) 2000 - 2012, 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"

#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_object_type type;
    acpi_status status;

    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 */

    type = acpi_ns_get_type(obj_handle);

    switch (type) {
    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:

        info->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);
}

/*******************************************************************************
 *
 * 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"));
    ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, "Parsing all Control Methods:"));

    /* Set all init info to zero */

    ACPI_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 */

    status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
    if (ACPI_FAILURE(status)) {
        return_ACPI_STATUS(status);
    }

    /*
     * 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_UNLOCK, acpi_ds_init_one_object,
                   NULL, &info, NULL);
    if (ACPI_FAILURE(status)) {
        ACPI_EXCEPTION((AE_INFO, status, "During WalkNamespace"));
    }
    (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);

    status = acpi_get_table_by_index(table_index, &table);
    if (ACPI_FAILURE(status)) {
        return_ACPI_STATUS(status);
    }

    ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
                  "\nTable [%4.4s](id %4.4X) - %u Objects with %u Devices %u Methods %u Regions\n",
                  table->signature, owner_id, info.object_count,
                  info.device_count, info.method_count,
                  info.op_region_count));

    ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
              "%u Methods, %u Regions\n", info.method_count,
              info.op_region_count));

    return_ACPI_STATUS(AE_OK);
}