Release 4.7 drivers/acpi/acpica/nsload.c

/******************************************************************************
 *
 * Module Name: nsload - namespace loading/expanding/contracting procedures
 *
 *****************************************************************************/

/*
 * Copyright (C) 2000 - 2016, 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 "acnamesp.h"
#include "acdispat.h"
#include "actables.h"


#define _COMPONENT          ACPI_NAMESPACE
ACPI_MODULE_NAME("nsload")

/* Local prototypes */
#ifdef ACPI_FUTURE_IMPLEMENTATION
acpi_status acpi_ns_unload_namespace(acpi_handle handle);

static acpi_status acpi_ns_delete_subtree(acpi_handle start_handle);
#endif

#ifndef ACPI_NO_METHOD_EXECUTION
/*******************************************************************************
 *
 * FUNCTION:    acpi_ns_load_table
 *
 * PARAMETERS:  table_index     - Index for table to be loaded
 *              node            - Owning NS node
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Load one ACPI table into the namespace
 *
 ******************************************************************************/


acpi_status

acpi_ns_load_table(u32 table_index, struct acpi_namespace_node *node)
{
	acpi_status status;

	ACPI_FUNCTION_TRACE(ns_load_table);

	/*
         * Parse the table and load the namespace with all named
         * objects found within. Control methods are NOT parsed
         * at this time. In fact, the control methods cannot be
         * parsed until the entire namespace is loaded, because
         * if a control method makes a forward reference (call)
         * to another control method, we can't continue parsing
         * because we don't know how many arguments to parse next!
         */
	status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	/* If table already loaded into namespace, just return */

	if (acpi_tb_is_table_loaded(table_index)) {
		status = AE_ALREADY_EXISTS;
		goto unlock;
	}

	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
			  "**** Loading table into namespace ****\n"));

	status = acpi_tb_allocate_owner_id(table_index);
	if (ACPI_FAILURE(status)) {
		goto unlock;
	}

	status = acpi_ns_parse_table(table_index, node);
	if (ACPI_SUCCESS(status)) {
		acpi_tb_set_table_loaded_flag(table_index, TRUE);
	} else {
		/*
                 * On error, delete any namespace objects created by this table.
                 * We cannot initialize these objects, so delete them. There are
                 * a couple of expecially bad cases:
                 * AE_ALREADY_EXISTS - namespace collision.
                 * AE_NOT_FOUND - the target of a Scope operator does not
                 * exist. This target of Scope must already exist in the
                 * namespace, as per the ACPI specification.
                 */
		(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
		acpi_ns_delete_namespace_by_owner(acpi_gbl_root_table_list.
						  tables[table_index].owner_id);

		acpi_tb_release_owner_id(table_index);
		return_ACPI_STATUS(status);
	}

unlock:
	(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);

	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	/*
         * Now we can parse the control methods. We always parse
         * them here for a sanity check, and if configured for
         * just-in-time parsing, we delete the control method
         * parse trees.
         */
	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
			  "**** Begin Table Object Initialization\n"));

	status = acpi_ds_initialize_objects(table_index, node);

	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
			  "**** Completed Table Object Initialization\n"));

	/*
         * Execute any module-level code that was detected during the table load
         * phase. Although illegal since ACPI 2.0, there are many machines that
         * contain this type of code. Each block of detected executable AML code
         * outside of any control method is wrapped with a temporary control
         * method object and placed on a global list. The methods on this list
         * are executed below.
         *
         * This case executes the module-level code for each table immediately
         * after the table has been loaded. This provides compatibility with
         * other ACPI implementations. Optionally, the execution can be deferred
         * until later, see acpi_initialize_objects.
         */
	if (!acpi_gbl_group_module_level_code) {
		acpi_ns_exec_module_code_list();
	}

	return_ACPI_STATUS(status);
}

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robert moore
robert moore
87
40.47%
8
57.14%
pre-git
pre-git
49
22.79%
2
14.29%
linus torvalds
linus torvalds
43
20.00%
1
7.14%
andy grover
andy grover
31
14.42%
2
14.29%
rafael j. wysocki
rafael j. wysocki
5
2.33%
1
7.14%
Total
215
100.00%
14
100.00%

#ifdef ACPI_OBSOLETE_FUNCTIONS
/*******************************************************************************
 *
 * FUNCTION:    acpi_load_namespace
 *
 * PARAMETERS:  None
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Load the name space from what ever is pointed to by DSDT.
 *              (DSDT points to either the BIOS or a buffer.)
 *
 ******************************************************************************/



acpi_status acpi_ns_load_namespace(void)
{
	acpi_status status;

	ACPI_FUNCTION_TRACE(acpi_load_name_space);

	/* There must be at least a DSDT installed */

	if (acpi_gbl_DSDT == NULL) {
		ACPI_ERROR((AE_INFO, "DSDT is not in memory"));
		return_ACPI_STATUS(AE_NO_ACPI_TABLES);
	}

	/*
         * Load the namespace. The DSDT is required,
         * but the SSDT and PSDT tables are optional.
         */
	status = acpi_ns_load_table_by_type(ACPI_TABLE_ID_DSDT);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	/* Ignore exceptions from these */

	(void)acpi_ns_load_table_by_type(ACPI_TABLE_ID_SSDT);
	(void)acpi_ns_load_table_by_type(ACPI_TABLE_ID_PSDT);

	ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
			      "ACPI Namespace successfully loaded at root %p\n",
			      acpi_gbl_root_node));

	return_ACPI_STATUS(status);
}
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andy grover
83
89.25%
2
33.33%
robert moore
robert moore
9
9.68%
3
50.00%
len brown
len brown
1
1.08%
1
16.67%
Total
93
100.00%
6
100.00%

#endif

#ifdef ACPI_FUTURE_IMPLEMENTATION
/*******************************************************************************
 *
 * FUNCTION:    acpi_ns_delete_subtree
 *
 * PARAMETERS:  start_handle        - Handle in namespace where search begins
 *
 * RETURNS      Status
 *
 * DESCRIPTION: Walks the namespace starting at the given handle and deletes
 *              all objects, entries, and scopes in the entire subtree.
 *
 *              Namespace/Interpreter should be locked or the subsystem should
 *              be in shutdown before this routine is called.
 *
 ******************************************************************************/



static acpi_status acpi_ns_delete_subtree(acpi_handle start_handle)
{
	acpi_status status;
	acpi_handle child_handle;
	acpi_handle parent_handle;
	acpi_handle next_child_handle;
	acpi_handle dummy;
	u32 level;

	ACPI_FUNCTION_TRACE(ns_delete_subtree);

	parent_handle = start_handle;
	child_handle = NULL;
	level = 1;

	/*
         * Traverse the tree of objects until we bubble back up
         * to where we started.
         */
	while (level > 0) {

		/* Attempt to get the next object in this scope */

		status = acpi_get_next_object(ACPI_TYPE_ANY, parent_handle,
					      child_handle, &next_child_handle);

		child_handle = next_child_handle;

		/* Did we get a new object? */

		if (ACPI_SUCCESS(status)) {

			/* Check if this object has any children */

			if (ACPI_SUCCESS
			    (acpi_get_next_object
			     (ACPI_TYPE_ANY, child_handle, NULL, &dummy))) {
				/*
                                 * There is at least one child of this object,
                                 * visit the object
                                 */
				level++;
				parent_handle = child_handle;
				child_handle = NULL;
			}
		} else {
			/*
                         * No more children in this object, go back up to
                         * the object's parent
                         */
			level--;

			/* Delete all children now */

			acpi_ns_delete_children(child_handle);

			child_handle = parent_handle;
			status = acpi_get_parent(parent_handle, &parent_handle);
			if (ACPI_FAILURE(status)) {
				return_ACPI_STATUS(status);
			}
		}
	}

	/* Now delete the starting object, and we are done */

	acpi_ns_remove_node(child_handle);
	return_ACPI_STATUS(AE_OK);
}

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pre-git
pre-git
129
77.71%
2
22.22%
andy grover
andy grover
17
10.24%
2
22.22%
linus torvalds
linus torvalds
14
8.43%
1
11.11%
robert moore
robert moore
3
1.81%
3
33.33%
mika kukkonen
mika kukkonen
3
1.81%
1
11.11%
Total
166
100.00%
9
100.00%

/*******************************************************************************
 *
 *  FUNCTION:       acpi_ns_unload_name_space
 *
 *  PARAMETERS:     handle          - Root of namespace subtree to be deleted
 *
 *  RETURN:         Status
 *
 *  DESCRIPTION:    Shrinks the namespace, typically in response to an undocking
 *                  event. Deletes an entire subtree starting from (and
 *                  including) the given handle.
 *
 ******************************************************************************/



acpi_status acpi_ns_unload_namespace(acpi_handle handle)
{
	acpi_status status;

	ACPI_FUNCTION_TRACE(ns_unload_name_space);

	/* Parameter validation */

	if (!acpi_gbl_root_node) {
		return_ACPI_STATUS(AE_NO_NAMESPACE);
	}

	if (!handle) {
		return_ACPI_STATUS(AE_BAD_PARAMETER);
	}

	/* This function does the real work */

	status = acpi_ns_delete_subtree(handle);
	return_ACPI_STATUS(status);
}
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pre-git
pre-git
34
62.96%
2
33.33%
linus torvalds
linus torvalds
17
31.48%
1
16.67%
len brown
len brown
1
1.85%
1
16.67%
andy grover
andy grover
1
1.85%
1
16.67%
robert moore
robert moore
1
1.85%
1
16.67%
Total
54
100.00%
6
100.00%

#endif
#endif
Overall Contributors
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CommitProp
pre-git
pre-git
224
37.77%
2
6.45%
andy grover
andy grover
141
23.78%
7
22.58%
robert moore
robert moore
134
22.60%
14
45.16%
linus torvalds
linus torvalds
75
12.65%
2
6.45%
len brown
len brown
10
1.69%
3
9.68%
rafael j. wysocki
rafael j. wysocki
5
0.84%
1
3.23%
mika kukkonen
mika kukkonen
3
0.51%
1
3.23%
patrick mochel
patrick mochel
1
0.17%
1
3.23%
Total
593
100.00%
31
100.00%
  
Directory: drivers/acpi/acpica

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