patch-2.4.7 linux/drivers/ieee1394/nodemgr.h

• Lines: 73
• Date: Fri Jul 20 12:47:31 2001
• Orig file: v2.4.6/linux/drivers/ieee1394/nodemgr.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.6/linux/drivers/ieee1394/nodemgr.h linux/drivers/ieee1394/nodemgr.h
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2000	Andreas E. Bombe
+ *               2001	Ben Collins <bcollins@debian.org>
+ *
+ * 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 _IEEE1394_NODEMGR_H
+#define _IEEE1394_NODEMGR_H
+
+
+/*
+ * General information: Finding out which GUID belongs to which node is done by
+ * sending packets and therefore waiting for the answers.  Wherever it is
+ * mentioned that a node is inaccessible this could just as well mean that we
+ * just don't know yet (usually, bus reset handlers can't rely on GUIDs being
+ * associated with current nodes).
+ */
+
+struct node_entry;
+typedef struct node_entry *hpsb_guid_t;
+
+
+/*
+ * Returns a guid handle (which has its reference count incremented) or NULL if
+ * there is the GUID in question is not known of.  Getting a valid handle does
+ * not mean that the node with this GUID is currently accessible (might not be
+ * plugged in or powered down).
+ */
+hpsb_guid_t hpsb_guid_get_handle(u64 guid);
+
+/*
+ * If the handle refers to a local host, this function will return the pointer
+ * to the hpsb_host structure.  It will return NULL otherwise.  Once you have
+ * established it is a local host, you can use that knowledge from then on (the
+ * GUID won't wander to an external node).
+ *
+ * Note that the local GUID currently isn't collected, so this will always
+ * return NULL.
+ */
+struct hpsb_host *hpsb_get_host_by_ge(hpsb_guid_t handle);
+
+/*
+ * This will fill in the given, pre-initialised hpsb_packet with the current
+ * information from the GUID handle (host, node ID, generation number).  It will
+ * return false if the node owning the GUID is not accessible (and not modify the 
+ * hpsb_packet) and return true otherwise.
+ *
+ * Note that packet sending may still fail in hpsb_send_packet if a bus reset
+ * happens while you are trying to set up the packet (due to obsolete generation
+ * number).  It will at least reliably fail so that you don't accidentally and
+ * unknowingly send your packet to the wrong node.
+ */
+int hpsb_guid_fill_packet(hpsb_guid_t handle, struct hpsb_packet *pkt);
+
+
+void init_ieee1394_nodemgr(void);
+void cleanup_ieee1394_nodemgr(void);
+
+#endif /* _IEEE1394_NODEMGR_H */