Release 4.17 drivers/acpi/acpica/nsload.c
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/******************************************************************************
*
* Module Name: nsload - namespace loading/expanding/contracting procedures
*
* Copyright (C) 2000 - 2018, Intel Corp.
*
*****************************************************************************/
#include <acpi/acpi.h>
#include "accommon.h"
#include "acnamesp.h"
#include "acdispat.h"
#include "actables.h"
#include "acinterp.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);
/* 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;
}
/*
* 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_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.
*/
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:
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"));
acpi_ex_enter_interpreter();
status = acpi_ds_initialize_objects(table_index, node);
acpi_ex_exit_interpreter();
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"**** Completed Table Object Initialization\n"));
/*
* This case handles the legacy option that groups all module-level
* code blocks together and defers execution until all of the tables
* are loaded. Execute all of these blocks at this time.
* Execute any module-level code that was detected during the table
* load phase.
*
* Note: this option is deprecated and will be eliminated in the
* future. Use of this option can cause problems with AML code that
* depends upon in-order immediate execution of module-level code.
*/
acpi_ns_exec_module_code_list();
return_ACPI_STATUS(status);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Robert Moore | 58 | 32.77% | 8 | 53.33% |
| Linus Torvalds (pre-git) | 43 | 24.29% | 2 | 13.33% |
| Linus Torvalds | 41 | 23.16% | 1 | 6.67% |
| Andy Grover | 28 | 15.82% | 2 | 13.33% |
| Lv Zheng | 7 | 3.95% | 2 | 13.33% |
| Total | 177 | 100.00% | 15 | 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);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Andy Grover | 83 | 89.25% | 2 | 33.33% |
| Robert Moore | 9 | 9.68% | 3 | 50.00% |
| 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);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 129 | 77.71% | 2 | 22.22% |
| Andy Grover | 17 | 10.24% | 2 | 22.22% |
| Linus Torvalds | 14 | 8.43% | 1 | 11.11% |
| Robert Moore | 3 | 1.81% | 3 | 33.33% |
| 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);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 34 | 62.96% | 2 | 33.33% |
| Linus Torvalds | 17 | 31.48% | 1 | 16.67% |
| Andy Grover | 1 | 1.85% | 1 | 16.67% |
| Robert Moore | 1 | 1.85% | 1 | 16.67% |
| Len Brown | 1 | 1.85% | 1 | 16.67% |
| Total | 54 | 100.00% | 6 | 100.00% |
#endif
#endif
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 218 | 39.07% | 2 | 6.45% |
| Andy Grover | 137 | 24.55% | 6 | 19.35% |
| Robert Moore | 104 | 18.64% | 13 | 41.94% |
| Linus Torvalds | 73 | 13.08% | 2 | 6.45% |
| Len Brown | 10 | 1.79% | 3 | 9.68% |
| Lv Zheng | 10 | 1.79% | 2 | 6.45% |
| Mika Kukkonen | 3 | 0.54% | 1 | 3.23% |
| Erik Schmauss | 2 | 0.36% | 1 | 3.23% |
| Patrick Mochel | 1 | 0.18% | 1 | 3.23% |
| Total | 558 | 100.00% | 31 | 100.00% |
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