1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
686 lines
17 KiB
C
686 lines
17 KiB
C
/*******************************************************************************
|
|
*
|
|
* Module Name: nsalloc - Namespace allocation and deletion utilities
|
|
*
|
|
******************************************************************************/
|
|
|
|
/*
|
|
* Copyright (C) 2000 - 2005, 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>
|
|
|
|
|
|
#define _COMPONENT ACPI_NAMESPACE
|
|
ACPI_MODULE_NAME ("nsalloc")
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ns_create_node
|
|
*
|
|
* PARAMETERS: acpi_name - Name of the new node
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Create a namespace node
|
|
*
|
|
******************************************************************************/
|
|
|
|
struct acpi_namespace_node *
|
|
acpi_ns_create_node (
|
|
u32 name)
|
|
{
|
|
struct acpi_namespace_node *node;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE ("ns_create_node");
|
|
|
|
|
|
node = ACPI_MEM_CALLOCATE (sizeof (struct acpi_namespace_node));
|
|
if (!node) {
|
|
return_PTR (NULL);
|
|
}
|
|
|
|
ACPI_MEM_TRACKING (acpi_gbl_memory_lists[ACPI_MEM_LIST_NSNODE].total_allocated++);
|
|
|
|
node->name.integer = name;
|
|
node->reference_count = 1;
|
|
ACPI_SET_DESCRIPTOR_TYPE (node, ACPI_DESC_TYPE_NAMED);
|
|
|
|
return_PTR (node);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ns_delete_node
|
|
*
|
|
* PARAMETERS: Node - Node to be deleted
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Delete a namespace node
|
|
*
|
|
******************************************************************************/
|
|
|
|
void
|
|
acpi_ns_delete_node (
|
|
struct acpi_namespace_node *node)
|
|
{
|
|
struct acpi_namespace_node *parent_node;
|
|
struct acpi_namespace_node *prev_node;
|
|
struct acpi_namespace_node *next_node;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_PTR ("ns_delete_node", node);
|
|
|
|
|
|
parent_node = acpi_ns_get_parent_node (node);
|
|
|
|
prev_node = NULL;
|
|
next_node = parent_node->child;
|
|
|
|
/* Find the node that is the previous peer in the parent's child list */
|
|
|
|
while (next_node != node) {
|
|
prev_node = next_node;
|
|
next_node = prev_node->peer;
|
|
}
|
|
|
|
if (prev_node) {
|
|
/* Node is not first child, unlink it */
|
|
|
|
prev_node->peer = next_node->peer;
|
|
if (next_node->flags & ANOBJ_END_OF_PEER_LIST) {
|
|
prev_node->flags |= ANOBJ_END_OF_PEER_LIST;
|
|
}
|
|
}
|
|
else {
|
|
/* Node is first child (has no previous peer) */
|
|
|
|
if (next_node->flags & ANOBJ_END_OF_PEER_LIST) {
|
|
/* No peers at all */
|
|
|
|
parent_node->child = NULL;
|
|
}
|
|
else { /* Link peer list to parent */
|
|
|
|
parent_node->child = next_node->peer;
|
|
}
|
|
}
|
|
|
|
|
|
ACPI_MEM_TRACKING (acpi_gbl_memory_lists[ACPI_MEM_LIST_NSNODE].total_freed++);
|
|
|
|
/*
|
|
* Detach an object if there is one then delete the node
|
|
*/
|
|
acpi_ns_detach_object (node);
|
|
ACPI_MEM_FREE (node);
|
|
return_VOID;
|
|
}
|
|
|
|
|
|
#ifdef ACPI_ALPHABETIC_NAMESPACE
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ns_compare_names
|
|
*
|
|
* PARAMETERS: Name1 - First name to compare
|
|
* Name2 - Second name to compare
|
|
*
|
|
* RETURN: value from strncmp
|
|
*
|
|
* DESCRIPTION: Compare two ACPI names. Names that are prefixed with an
|
|
* underscore are forced to be alphabetically first.
|
|
*
|
|
******************************************************************************/
|
|
|
|
int
|
|
acpi_ns_compare_names (
|
|
char *name1,
|
|
char *name2)
|
|
{
|
|
char reversed_name1[ACPI_NAME_SIZE];
|
|
char reversed_name2[ACPI_NAME_SIZE];
|
|
u32 i;
|
|
u32 j;
|
|
|
|
|
|
/*
|
|
* Replace all instances of "underscore" with a value that is smaller so
|
|
* that all names that are prefixed with underscore(s) are alphabetically
|
|
* first.
|
|
*
|
|
* Reverse the name bytewise so we can just do a 32-bit compare instead
|
|
* of a strncmp.
|
|
*/
|
|
for (i = 0, j= (ACPI_NAME_SIZE - 1); i < ACPI_NAME_SIZE; i++, j--) {
|
|
reversed_name1[j] = name1[i];
|
|
if (name1[i] == '_') {
|
|
reversed_name1[j] = '*';
|
|
}
|
|
|
|
reversed_name2[j] = name2[i];
|
|
if (name2[i] == '_') {
|
|
reversed_name2[j] = '*';
|
|
}
|
|
}
|
|
|
|
return (*(int *) reversed_name1 - *(int *) reversed_name2);
|
|
}
|
|
#endif
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ns_install_node
|
|
*
|
|
* PARAMETERS: walk_state - Current state of the walk
|
|
* parent_node - The parent of the new Node
|
|
* Node - The new Node to install
|
|
* Type - ACPI object type of the new Node
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Initialize a new namespace node and install it amongst
|
|
* its peers.
|
|
*
|
|
* Note: Current namespace lookup is linear search. However, the
|
|
* nodes are linked in alphabetical order to 1) put all reserved
|
|
* names (start with underscore) first, and to 2) make a readable
|
|
* namespace dump.
|
|
*
|
|
******************************************************************************/
|
|
|
|
void
|
|
acpi_ns_install_node (
|
|
struct acpi_walk_state *walk_state,
|
|
struct acpi_namespace_node *parent_node, /* Parent */
|
|
struct acpi_namespace_node *node, /* New Child*/
|
|
acpi_object_type type)
|
|
{
|
|
u16 owner_id = 0;
|
|
struct acpi_namespace_node *child_node;
|
|
#ifdef ACPI_ALPHABETIC_NAMESPACE
|
|
|
|
struct acpi_namespace_node *previous_child_node;
|
|
#endif
|
|
|
|
|
|
ACPI_FUNCTION_TRACE ("ns_install_node");
|
|
|
|
|
|
/*
|
|
* Get the owner ID from the Walk state
|
|
* The owner ID is used to track table deletion and
|
|
* deletion of objects created by methods
|
|
*/
|
|
if (walk_state) {
|
|
owner_id = walk_state->owner_id;
|
|
}
|
|
|
|
/* Link the new entry into the parent and existing children */
|
|
|
|
child_node = parent_node->child;
|
|
if (!child_node) {
|
|
parent_node->child = node;
|
|
node->flags |= ANOBJ_END_OF_PEER_LIST;
|
|
node->peer = parent_node;
|
|
}
|
|
else {
|
|
#ifdef ACPI_ALPHABETIC_NAMESPACE
|
|
/*
|
|
* Walk the list whilst searching for the correct
|
|
* alphabetic placement.
|
|
*/
|
|
previous_child_node = NULL;
|
|
while (acpi_ns_compare_names (acpi_ut_get_node_name (child_node), acpi_ut_get_node_name (node)) < 0) {
|
|
if (child_node->flags & ANOBJ_END_OF_PEER_LIST) {
|
|
/* Last peer; Clear end-of-list flag */
|
|
|
|
child_node->flags &= ~ANOBJ_END_OF_PEER_LIST;
|
|
|
|
/* This node is the new peer to the child node */
|
|
|
|
child_node->peer = node;
|
|
|
|
/* This node is the new end-of-list */
|
|
|
|
node->flags |= ANOBJ_END_OF_PEER_LIST;
|
|
node->peer = parent_node;
|
|
break;
|
|
}
|
|
|
|
/* Get next peer */
|
|
|
|
previous_child_node = child_node;
|
|
child_node = child_node->peer;
|
|
}
|
|
|
|
/* Did the node get inserted at the end-of-list? */
|
|
|
|
if (!(node->flags & ANOBJ_END_OF_PEER_LIST)) {
|
|
/*
|
|
* Loop above terminated without reaching the end-of-list.
|
|
* Insert the new node at the current location
|
|
*/
|
|
if (previous_child_node) {
|
|
/* Insert node alphabetically */
|
|
|
|
node->peer = child_node;
|
|
previous_child_node->peer = node;
|
|
}
|
|
else {
|
|
/* Insert node alphabetically at start of list */
|
|
|
|
node->peer = child_node;
|
|
parent_node->child = node;
|
|
}
|
|
}
|
|
#else
|
|
while (!(child_node->flags & ANOBJ_END_OF_PEER_LIST)) {
|
|
child_node = child_node->peer;
|
|
}
|
|
|
|
child_node->peer = node;
|
|
|
|
/* Clear end-of-list flag */
|
|
|
|
child_node->flags &= ~ANOBJ_END_OF_PEER_LIST;
|
|
node->flags |= ANOBJ_END_OF_PEER_LIST;
|
|
node->peer = parent_node;
|
|
#endif
|
|
}
|
|
|
|
/* Init the new entry */
|
|
|
|
node->owner_id = owner_id;
|
|
node->type = (u8) type;
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
|
|
"%4.4s (%s) [Node %p Owner %X] added to %4.4s (%s) [Node %p]\n",
|
|
acpi_ut_get_node_name (node), acpi_ut_get_type_name (node->type), node, owner_id,
|
|
acpi_ut_get_node_name (parent_node), acpi_ut_get_type_name (parent_node->type),
|
|
parent_node));
|
|
|
|
/*
|
|
* Increment the reference count(s) of all parents up to
|
|
* the root!
|
|
*/
|
|
while ((node = acpi_ns_get_parent_node (node)) != NULL) {
|
|
node->reference_count++;
|
|
}
|
|
|
|
return_VOID;
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ns_delete_children
|
|
*
|
|
* PARAMETERS: parent_node - Delete this objects children
|
|
*
|
|
* RETURN: None.
|
|
*
|
|
* DESCRIPTION: Delete all children of the parent object. In other words,
|
|
* deletes a "scope".
|
|
*
|
|
******************************************************************************/
|
|
|
|
void
|
|
acpi_ns_delete_children (
|
|
struct acpi_namespace_node *parent_node)
|
|
{
|
|
struct acpi_namespace_node *child_node;
|
|
struct acpi_namespace_node *next_node;
|
|
struct acpi_namespace_node *node;
|
|
u8 flags;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_PTR ("ns_delete_children", parent_node);
|
|
|
|
|
|
if (!parent_node) {
|
|
return_VOID;
|
|
}
|
|
|
|
/* If no children, all done! */
|
|
|
|
child_node = parent_node->child;
|
|
if (!child_node) {
|
|
return_VOID;
|
|
}
|
|
|
|
/*
|
|
* Deallocate all children at this level
|
|
*/
|
|
do {
|
|
/* Get the things we need */
|
|
|
|
next_node = child_node->peer;
|
|
flags = child_node->flags;
|
|
|
|
/* Grandchildren should have all been deleted already */
|
|
|
|
if (child_node->child) {
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Found a grandchild! P=%p C=%p\n",
|
|
parent_node, child_node));
|
|
}
|
|
|
|
/* Now we can free this child object */
|
|
|
|
ACPI_MEM_TRACKING (acpi_gbl_memory_lists[ACPI_MEM_LIST_NSNODE].total_freed++);
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "Object %p, Remaining %X\n",
|
|
child_node, acpi_gbl_current_node_count));
|
|
|
|
/*
|
|
* Detach an object if there is one, then free the child node
|
|
*/
|
|
acpi_ns_detach_object (child_node);
|
|
|
|
/*
|
|
* Decrement the reference count(s) of all parents up to
|
|
* the root! (counts were incremented when the node was created)
|
|
*/
|
|
node = child_node;
|
|
while ((node = acpi_ns_get_parent_node (node)) != NULL) {
|
|
node->reference_count--;
|
|
}
|
|
|
|
/* There should be only one reference remaining on this node */
|
|
|
|
if (child_node->reference_count != 1) {
|
|
ACPI_REPORT_WARNING (("Existing references (%d) on node being deleted (%p)\n",
|
|
child_node->reference_count, child_node));
|
|
}
|
|
|
|
/* Now we can delete the node */
|
|
|
|
ACPI_MEM_FREE (child_node);
|
|
|
|
/* And move on to the next child in the list */
|
|
|
|
child_node = next_node;
|
|
|
|
} while (!(flags & ANOBJ_END_OF_PEER_LIST));
|
|
|
|
|
|
/* Clear the parent's child pointer */
|
|
|
|
parent_node->child = NULL;
|
|
|
|
return_VOID;
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ns_delete_namespace_subtree
|
|
*
|
|
* PARAMETERS: parent_node - Root of the subtree to be deleted
|
|
*
|
|
* RETURN: None.
|
|
*
|
|
* DESCRIPTION: Delete a subtree of the namespace. This includes all objects
|
|
* stored within the subtree.
|
|
*
|
|
******************************************************************************/
|
|
|
|
void
|
|
acpi_ns_delete_namespace_subtree (
|
|
struct acpi_namespace_node *parent_node)
|
|
{
|
|
struct acpi_namespace_node *child_node = NULL;
|
|
u32 level = 1;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE ("ns_delete_namespace_subtree");
|
|
|
|
|
|
if (!parent_node) {
|
|
return_VOID;
|
|
}
|
|
|
|
/*
|
|
* Traverse the tree of objects until we bubble back up
|
|
* to where we started.
|
|
*/
|
|
while (level > 0) {
|
|
/* Get the next node in this scope (NULL if none) */
|
|
|
|
child_node = acpi_ns_get_next_node (ACPI_TYPE_ANY, parent_node,
|
|
child_node);
|
|
if (child_node) {
|
|
/* Found a child node - detach any attached object */
|
|
|
|
acpi_ns_detach_object (child_node);
|
|
|
|
/* Check if this node has any children */
|
|
|
|
if (acpi_ns_get_next_node (ACPI_TYPE_ANY, child_node, NULL)) {
|
|
/*
|
|
* There is at least one child of this node,
|
|
* visit the node
|
|
*/
|
|
level++;
|
|
parent_node = child_node;
|
|
child_node = NULL;
|
|
}
|
|
}
|
|
else {
|
|
/*
|
|
* No more children of this parent node.
|
|
* Move up to the grandparent.
|
|
*/
|
|
level--;
|
|
|
|
/*
|
|
* Now delete all of the children of this parent
|
|
* all at the same time.
|
|
*/
|
|
acpi_ns_delete_children (parent_node);
|
|
|
|
/* New "last child" is this parent node */
|
|
|
|
child_node = parent_node;
|
|
|
|
/* Move up the tree to the grandparent */
|
|
|
|
parent_node = acpi_ns_get_parent_node (parent_node);
|
|
}
|
|
}
|
|
|
|
return_VOID;
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ns_remove_reference
|
|
*
|
|
* PARAMETERS: Node - Named node whose reference count is to be
|
|
* decremented
|
|
*
|
|
* RETURN: None.
|
|
*
|
|
* DESCRIPTION: Remove a Node reference. Decrements the reference count
|
|
* of all parent Nodes up to the root. Any node along
|
|
* the way that reaches zero references is freed.
|
|
*
|
|
******************************************************************************/
|
|
|
|
void
|
|
acpi_ns_remove_reference (
|
|
struct acpi_namespace_node *node)
|
|
{
|
|
struct acpi_namespace_node *parent_node;
|
|
struct acpi_namespace_node *this_node;
|
|
|
|
|
|
ACPI_FUNCTION_ENTRY ();
|
|
|
|
|
|
/*
|
|
* Decrement the reference count(s) of this node and all
|
|
* nodes up to the root, Delete anything with zero remaining references.
|
|
*/
|
|
this_node = node;
|
|
while (this_node) {
|
|
/* Prepare to move up to parent */
|
|
|
|
parent_node = acpi_ns_get_parent_node (this_node);
|
|
|
|
/* Decrement the reference count on this node */
|
|
|
|
this_node->reference_count--;
|
|
|
|
/* Delete the node if no more references */
|
|
|
|
if (!this_node->reference_count) {
|
|
/* Delete all children and delete the node */
|
|
|
|
acpi_ns_delete_children (this_node);
|
|
acpi_ns_delete_node (this_node);
|
|
}
|
|
|
|
this_node = parent_node;
|
|
}
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ns_delete_namespace_by_owner
|
|
*
|
|
* PARAMETERS: owner_id - All nodes with this owner will be deleted
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Delete entries within the namespace that are owned by a
|
|
* specific ID. Used to delete entire ACPI tables. All
|
|
* reference counts are updated.
|
|
*
|
|
******************************************************************************/
|
|
|
|
void
|
|
acpi_ns_delete_namespace_by_owner (
|
|
u16 owner_id)
|
|
{
|
|
struct acpi_namespace_node *child_node;
|
|
struct acpi_namespace_node *deletion_node;
|
|
u32 level;
|
|
struct acpi_namespace_node *parent_node;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_U32 ("ns_delete_namespace_by_owner", owner_id);
|
|
|
|
|
|
parent_node = acpi_gbl_root_node;
|
|
child_node = NULL;
|
|
deletion_node = NULL;
|
|
level = 1;
|
|
|
|
/*
|
|
* Traverse the tree of nodes until we bubble back up
|
|
* to where we started.
|
|
*/
|
|
while (level > 0) {
|
|
/*
|
|
* Get the next child of this parent node. When child_node is NULL,
|
|
* the first child of the parent is returned
|
|
*/
|
|
child_node = acpi_ns_get_next_node (ACPI_TYPE_ANY, parent_node, child_node);
|
|
|
|
if (deletion_node) {
|
|
acpi_ns_remove_reference (deletion_node);
|
|
deletion_node = NULL;
|
|
}
|
|
|
|
if (child_node) {
|
|
if (child_node->owner_id == owner_id) {
|
|
/* Found a matching child node - detach any attached object */
|
|
|
|
acpi_ns_detach_object (child_node);
|
|
}
|
|
|
|
/* Check if this node has any children */
|
|
|
|
if (acpi_ns_get_next_node (ACPI_TYPE_ANY, child_node, NULL)) {
|
|
/*
|
|
* There is at least one child of this node,
|
|
* visit the node
|
|
*/
|
|
level++;
|
|
parent_node = child_node;
|
|
child_node = NULL;
|
|
}
|
|
else if (child_node->owner_id == owner_id) {
|
|
deletion_node = child_node;
|
|
}
|
|
}
|
|
else {
|
|
/*
|
|
* No more children of this parent node.
|
|
* Move up to the grandparent.
|
|
*/
|
|
level--;
|
|
if (level != 0) {
|
|
if (parent_node->owner_id == owner_id) {
|
|
deletion_node = parent_node;
|
|
}
|
|
}
|
|
|
|
/* New "last child" is this parent node */
|
|
|
|
child_node = parent_node;
|
|
|
|
/* Move up the tree to the grandparent */
|
|
|
|
parent_node = acpi_ns_get_parent_node (parent_node);
|
|
}
|
|
}
|
|
|
|
return_VOID;
|
|
}
|
|
|
|
|