Linux-2.6.12-rc2

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!

1 files changed, 685 insertions, 0 deletions

diff --git a/drivers/acpi/namespace/nsalloc.c b/drivers/acpi/namespace/nsalloc.c
new file mode 100644
index 00000000000..bfd922c5c7d
--- /dev/null
+++ b/drivers/acpi/namespace/nsalloc.c
@@ -0,0 +1,685 @@
+/*******************************************************************************
+ *
+ * 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;
+}
+
+