c9755e14a0
When a device changes its configuration ROM, it announces this with a
bus reset. firewire-core has to check which node initiated a bus reset
and whether any unit directories went away or were added on this node.
Tested with an IOI FWB-IDE01AB which has its link-on bit set if bus
power is available but does not respond to ROM read requests if self
power is off. This implements
- recognition of the units if self power is switched on after fw-core
gave up the initial attempt to read the config ROM,
- shutdown of the units when self power is switched off.
Also tested with a second PC running Linux/ieee1394. When the eth1394
driver is inserted and removed on that node, fw-core now notices the
addition and removal of the IPv4 unit on the ieee1394 node.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
76 lines
1.8 KiB
C
76 lines
1.8 KiB
C
/*
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* Copyright (C) 2003-2006 Kristian Hoegsberg <krh@bitplanet.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef __fw_topology_h
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#define __fw_topology_h
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enum {
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FW_NODE_CREATED,
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FW_NODE_UPDATED,
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FW_NODE_DESTROYED,
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FW_NODE_LINK_ON,
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FW_NODE_LINK_OFF,
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FW_NODE_INITIATED_RESET,
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};
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struct fw_node {
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u16 node_id;
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u8 color;
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u8 port_count;
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u8 link_on : 1;
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u8 initiated_reset : 1;
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u8 b_path : 1;
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u8 phy_speed : 2; /* As in the self ID packet. */
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u8 max_speed : 2; /* Minimum of all phy-speeds on the path from the
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* local node to this node. */
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u8 max_depth : 4; /* Maximum depth to any leaf node */
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u8 max_hops : 4; /* Max hops in this sub tree */
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atomic_t ref_count;
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/* For serializing node topology into a list. */
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struct list_head link;
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/* Upper layer specific data. */
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void *data;
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struct fw_node *ports[0];
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};
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static inline struct fw_node *
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fw_node_get(struct fw_node *node)
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{
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atomic_inc(&node->ref_count);
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return node;
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}
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static inline void
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fw_node_put(struct fw_node *node)
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{
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if (atomic_dec_and_test(&node->ref_count))
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kfree(node);
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}
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void
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fw_destroy_nodes(struct fw_card *card);
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int
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fw_compute_block_crc(u32 *block);
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#endif /* __fw_topology_h */
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