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/******************************************************************************

 *

 * Module Name: nsinit - namespace initialization

 *

 *****************************************************************************/

/*

 * Copyright (C) 2000 - 2004, 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")

/*******************************************************************************

 *

 * 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_DEBUG_PRINT ((ACPI_DB_ERROR, "walk_namespace failed! %s\n",

                        acpi_format_exception (status)));

        }

        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 of type Device or Processor */

        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_DEBUG_PRINT ((ACPI_DB_ERROR, "walk_namespace failed! %s\n",

                        acpi_format_exception (status)));

        }

        ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,

                "\n%hd Devices found containing: %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

 *

 ******************************************************************************/

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_DEBUG_PRINT_RAW ((ACPI_DB_ERROR, "\n"));

                ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,

                                "Could not execute arguments for [%4.4s] (%s), %s\n",

                                acpi_ut_get_node_name (node), acpi_ut_get_type_name (type),

                                acpi_format_exception (status)));

        }

        /* 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.

 *

 ******************************************************************************/

acpi_status

acpi_ns_init_one_device (

        acpi_handle                     obj_handle,

        u32                             nesting_level,

        void                            *context,

        void                            **return_value)

{

        acpi_status                     status;

        struct acpi_namespace_node     *node;

        u32                             flags;

        struct acpi_device_walk_info   *info = (struct acpi_device_walk_info *) context;

        ACPI_FUNCTION_TRACE ("ns_init_one_device");

        node = acpi_ns_map_handle_to_node (obj_handle);

        if (!node) {

                return_ACPI_STATUS (AE_BAD_PARAMETER);

        }

        /*

         * We will run _STA/_INI on Devices and Processors only

         */

        if ((node->type != ACPI_TYPE_DEVICE) &&

                (node->type != ACPI_TYPE_PROCESSOR)) {

                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++;

        /*

         * Run _STA to determine if we can run _INI on the device.

         */

        ACPI_DEBUG_EXEC (acpi_ut_display_init_pathname (ACPI_TYPE_METHOD, node, "_STA"));

        status = acpi_ut_execute_STA (node, &flags);

        if (ACPI_FAILURE (status)) {

                if (node->type == ACPI_TYPE_DEVICE) {

                        /* Ignore error and move on to next device */

                        return_ACPI_STATUS (AE_OK);

                }

                /* _STA is not required for Processor objects */

        }

        else {

                info->num_STA++;

                if (!(flags & 0x01)) {

                        /* Don't look at children of a not present device */

                        return_ACPI_STATUS(AE_CTRL_DEPTH);

                }

        }

        /*

         * The device is present. Run _INI.

         */

        ACPI_DEBUG_EXEC (acpi_ut_display_init_pathname (ACPI_TYPE_METHOD, obj_handle, "_INI"));

        status = acpi_ns_evaluate_relative (obj_handle, "_INI", NULL, NULL);

        if (ACPI_FAILURE (status)) {

                /* No _INI (AE_NOT_FOUND) means device requires no initialization */

                if (status != AE_NOT_FOUND) {

                        /* Ignore error and move on to next device */

        #ifdef ACPI_DEBUG_OUTPUT

                        char                *scope_name = acpi_ns_get_external_pathname (obj_handle);

                        ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "%s._INI failed: %s\n",

                                        scope_name, acpi_format_exception (status)));

                        ACPI_MEM_FREE (scope_name);

        #endif

                }

                status = AE_OK;

        }

        else {

                /* Count of successful INIs */

                info->num_INI++;

        }

        if (acpi_gbl_init_handler) {

                /* External initialization handler is present, call it */

                status = acpi_gbl_init_handler (obj_handle, ACPI_INIT_DEVICE_INI);

        }

        return_ACPI_STATUS (status);

}