diff --git a/drivers/firewire/fw-topology.h b/drivers/firewire/fw-topology.h
new file mode 100644
index 0000000..7582d6e
--- /dev/null
+++ b/drivers/firewire/fw-topology.h
@@ -0,0 +1,84 @@
+/*						-*- c-basic-offset: 8 -*-
+ *
+ * fw-topology.h -- Incremental bus scan, based on bus topology
+ *
+ * Copyright (C) 2003-2006 Kristian Hoegsberg <krh@bitplanet.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#ifndef __fw_topology_h
+#define __fw_topology_h
+
+enum {
+	FW_NODE_CREATED =   0x00,
+	FW_NODE_UPDATED =   0x01,
+	FW_NODE_DESTROYED = 0x02,
+	FW_NODE_LINK_ON =   0x03,
+	FW_NODE_LINK_OFF =  0x04
+};
+
+struct fw_port {
+	struct fw_node *node;
+	unsigned speed : 3; /* S100, S200, ... S3200 */
+};
+
+struct fw_node {
+	u16 node_id;
+        u8 color;
+	u8 port_count;
+	unsigned link_on : 1;
+	unsigned initiated_reset : 1;
+	unsigned b_path : 1;
+	u8 phy_speed; /* As in the self ID packet. */
+	u8 max_speed; /* Minimum of all phy-speeds and port speeds on
+		       * the path from the local node to this node. */
+
+	atomic_t ref_count;
+
+        /* For serializing node topology into a list. */
+	struct list_head link;
+
+	/* Upper layer specific data. */
+	void *data;
+
+        struct fw_port ports[0];
+};
+
+extern inline struct fw_node *
+fw_node(struct list_head *l)
+{
+        return list_entry (l, struct fw_node, link);
+}
+
+extern inline struct fw_node *
+fw_node_get(struct fw_node *node)
+{
+	atomic_inc(&node->ref_count);
+
+	return node;
+}
+
+extern inline void
+fw_node_put(struct fw_node *node)
+{
+	if (atomic_dec_and_test(&node->ref_count))
+		kfree(node);
+}
+
+void
+fw_destroy_nodes(struct fw_card *card);
+
+#endif