f139749001
Use a speed probe to determine the speed over 1394b buses and of nodes which report a link speed less than their PHY speed. Log the effective maximum speed of newly created nodes in dmesg. Also, read the config ROM (except bus info block) at the maximum speed rather than S100. This isn't a real optimization though because we still only use quadlet read requests for the entire ROM. The patch also adds support for S1600 and S3200, although such hardware does not exist yet. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Kristian Høgsberg <krh@redhat.com>
86 lines
2 KiB
C
86 lines
2 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 = 0x00,
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FW_NODE_UPDATED = 0x01,
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FW_NODE_DESTROYED = 0x02,
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FW_NODE_LINK_ON = 0x03,
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FW_NODE_LINK_OFF = 0x04,
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};
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struct fw_port {
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struct fw_node *node;
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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_port ports[0];
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};
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static inline struct fw_node *
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fw_node(struct list_head *l)
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{
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return list_entry(l, struct fw_node, link);
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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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