tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright (C) 2003-2006 Kristian Hoegsberg <krh@bitplanet.net>
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software Foundation,
16 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17 */
18
19#ifndef __fw_topology_h
20#define __fw_topology_h
21
22#include <linux/list.h>
23#include <linux/slab.h>
24
25#include <asm/atomic.h>
26
27enum {
28 FW_NODE_CREATED,
29 FW_NODE_UPDATED,
30 FW_NODE_DESTROYED,
31 FW_NODE_LINK_ON,
32 FW_NODE_LINK_OFF,
33 FW_NODE_INITIATED_RESET,
34};
35
36struct fw_node {
37 u16 node_id;
38 u8 color;
39 u8 port_count;
40 u8 link_on : 1;
41 u8 initiated_reset : 1;
42 u8 b_path : 1;
43 u8 phy_speed : 2; /* As in the self ID packet. */
44 u8 max_speed : 2; /* Minimum of all phy-speeds on the path from the
45 * local node to this node. */
46 u8 max_depth : 4; /* Maximum depth to any leaf node */
47 u8 max_hops : 4; /* Max hops in this sub tree */
48 atomic_t ref_count;
49
50 /* For serializing node topology into a list. */
51 struct list_head link;
52
53 /* Upper layer specific data. */
54 void *data;
55
56 struct fw_node *ports[0];
57};
58
59static inline struct fw_node *fw_node_get(struct fw_node *node)
60{
61 atomic_inc(&node->ref_count);
62
63 return node;
64}
65
66static inline void fw_node_put(struct fw_node *node)
67{
68 if (atomic_dec_and_test(&node->ref_count))
69 kfree(node);
70}
71
72struct fw_card;
73void fw_destroy_nodes(struct fw_card *card);
74
75int fw_compute_block_crc(u32 *block);
76
77#endif /* __fw_topology_h */