/drivers/staging/ath6kl/wlan/include/ieee80211_node.h

 1//------------------------------------------------------------------------------
 2// <copyright file="ieee80211_node.h" company="Atheros">
 3//    Copyright (c) 2004-2010 Atheros Corporation.  All rights reserved.
 4// 
 5//
 6// Permission to use, copy, modify, and/or distribute this software for any
 7// purpose with or without fee is hereby granted, provided that the above
 8// copyright notice and this permission notice appear in all copies.
 9//
10// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17//
18//
19//------------------------------------------------------------------------------
20//==============================================================================
21// Author(s): ="Atheros"
22//==============================================================================
23#ifndef _IEEE80211_NODE_H_
24#define _IEEE80211_NODE_H_
25
26/*
27 * Node locking definitions.
28 */
29#define IEEE80211_NODE_LOCK_INIT(_nt)   A_MUTEX_INIT(&(_nt)->nt_nodelock)
30#define IEEE80211_NODE_LOCK_DESTROY(_nt) if (A_IS_MUTEX_VALID(&(_nt)->nt_nodelock)) { \
31                                               A_MUTEX_DELETE(&(_nt)->nt_nodelock); }
32       
33#define IEEE80211_NODE_LOCK(_nt)        A_MUTEX_LOCK(&(_nt)->nt_nodelock)
34#define IEEE80211_NODE_UNLOCK(_nt)      A_MUTEX_UNLOCK(&(_nt)->nt_nodelock)
35#define IEEE80211_NODE_LOCK_BH(_nt)     A_MUTEX_LOCK(&(_nt)->nt_nodelock)
36#define IEEE80211_NODE_UNLOCK_BH(_nt)   A_MUTEX_UNLOCK(&(_nt)->nt_nodelock)
37#define IEEE80211_NODE_LOCK_ASSERT(_nt)
38
39/*
40 * Node reference counting definitions.
41 *
42 * ieee80211_node_initref   initialize the reference count to 1
43 * ieee80211_node_incref    add a reference
44 * ieee80211_node_decref    remove a reference
45 * ieee80211_node_dectestref    remove a reference and return 1 if this
46 *              is the last reference, otherwise 0
47 * ieee80211_node_refcnt    reference count for printing (only)
48 */
49#define ieee80211_node_initref(_ni)     ((_ni)->ni_refcnt = 1)
50#define ieee80211_node_incref(_ni)      ((_ni)->ni_refcnt++)
51#define ieee80211_node_decref(_ni)      ((_ni)->ni_refcnt--)
52#define ieee80211_node_dectestref(_ni)  (((_ni)->ni_refcnt--) == 1)
53#define ieee80211_node_refcnt(_ni)      ((_ni)->ni_refcnt)
54
55#define IEEE80211_NODE_HASHSIZE 32
56/* simple hash is enough for variation of macaddr */
57#define IEEE80211_NODE_HASH(addr)   \
58    (((const u8 *)(addr))[IEEE80211_ADDR_LEN - 1] % \
59        IEEE80211_NODE_HASHSIZE)
60
61/*
62 * Table of ieee80211_node instances.  Each ieee80211com
63 * has at least one for holding the scan candidates.
64 * When operating as an access point or in ibss mode there
65 * is a second table for associated stations or neighbors.
66 */
67struct ieee80211_node_table {
68    void                   *nt_wmip;       /* back reference */
69    A_MUTEX_T               nt_nodelock;    /* on node table */
70    struct bss              *nt_node_first; /* information of all nodes */
71    struct bss              *nt_node_last;  /* information of all nodes */
72    struct bss              *nt_hash[IEEE80211_NODE_HASHSIZE];
73    const char              *nt_name;   /* for debugging */
74    u32 nt_scangen; /* gen# for timeout scan */
75#ifdef THREAD_X
76    A_TIMER                 nt_inact_timer;
77    u8 isTimerArmed;   /* is the node timer armed */
78#endif
79    u32 nt_nodeAge; /* node aging time */
80#ifdef OS_ROAM_MANAGEMENT
81    u32 nt_si_gen; /* gen# for scan indication*/
82#endif
83};
84
85#ifdef THREAD_X
86#define WLAN_NODE_INACT_TIMEOUT_MSEC            20000
87#else
88#define WLAN_NODE_INACT_TIMEOUT_MSEC            120000
89#endif
90   
91#define WLAN_NODE_INACT_CNT            4
92
93#endif /* _IEEE80211_NODE_H_ */