target/linux/s3c24xx/files-2.6.30/drivers/ar6000/include/ieee80211_node.h

   1 /*-
   2  * Copyright (c) 2001 Atsushi Onoe
   3  * Copyright (c) 2002-2004 Sam Leffler, Errno Consulting
   4  * Copyright (c) 2006 Atheros Communications, Inc.
   5  *
   6  * Wireless Network driver for Atheros AR6001
   7  * All rights reserved.
   8  *
   9  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  10  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  11  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  12  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  13  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  14  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  15  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  16  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  17  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  18  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  19  *
  20  */
  21 #ifndef _IEEE80211_NODE_H_
  22 #define _IEEE80211_NODE_H_
  23
  24 /*
  25  * Node locking definitions.
  26  */
  27 #define IEEE80211_NODE_LOCK_INIT(_nt)   A_MUTEX_INIT(&(_nt)->nt_nodelock)
  28 #define IEEE80211_NODE_LOCK_DESTROY(_nt)
  29 #define IEEE80211_NODE_LOCK(_nt)        A_MUTEX_LOCK(&(_nt)->nt_nodelock)
  30 #define IEEE80211_NODE_UNLOCK(_nt)      A_MUTEX_UNLOCK(&(_nt)->nt_nodelock)
  31 #define IEEE80211_NODE_LOCK_BH(_nt)     A_MUTEX_LOCK(&(_nt)->nt_nodelock)
  32 #define IEEE80211_NODE_UNLOCK_BH(_nt)   A_MUTEX_UNLOCK(&(_nt)->nt_nodelock)
  33 #define IEEE80211_NODE_LOCK_ASSERT(_nt)
  34
  35 /*
  36  * Node reference counting definitions.
  37  *
  38  * ieee80211_node_initref   initialize the reference count to 1
  39  * ieee80211_node_incref    add a reference
  40  * ieee80211_node_decref    remove a reference
  41  * ieee80211_node_dectestref    remove a reference and return 1 if this
  42  *              is the last reference, otherwise 0
  43  * ieee80211_node_refcnt    reference count for printing (only)
  44  */
  45 #define ieee80211_node_initref(_ni)     ((_ni)->ni_refcnt = 1)
  46 #define ieee80211_node_incref(_ni)      ((_ni)->ni_refcnt++)
  47 #define ieee80211_node_decref(_ni)      ((_ni)->ni_refcnt--)
  48 #define ieee80211_node_dectestref(_ni)  (((_ni)->ni_refcnt--) == 0)
  49 #define ieee80211_node_refcnt(_ni)      ((_ni)->ni_refcnt)
  50
  51 #define IEEE80211_NODE_HASHSIZE 32
  52 /* simple hash is enough for variation of macaddr */
  53 #define IEEE80211_NODE_HASH(addr)   \
  54     (((const A_UINT8 *)(addr))[IEEE80211_ADDR_LEN - 1] % \
  55         IEEE80211_NODE_HASHSIZE)
  56
  57 /*
  58  * Table of ieee80211_node instances.  Each ieee80211com
  59  * has at least one for holding the scan candidates.
  60  * When operating as an access point or in ibss mode there
  61  * is a second table for associated stations or neighbors.
  62  */
  63 struct ieee80211_node_table {
  64     void                   *nt_wmip;       /* back reference */
  65     A_MUTEX_T               nt_nodelock;    /* on node table */
  66     struct bss              *nt_node_first; /* information of all nodes */
  67     struct bss              *nt_node_last;  /* information of all nodes */
  68     struct bss              *nt_hash[IEEE80211_NODE_HASHSIZE];
  69     const char              *nt_name;   /* for debugging */
  70     A_UINT32                nt_scangen; /* gen# for timeout scan */
  71     A_TIMER                 nt_inact_timer;
  72     A_UINT8                 isTimerArmed;   /* is the node timer armed */
  73 };
  74
  75 #define WLAN_NODE_INACT_TIMEOUT_MSEC            10000
  76
  77 #endif /* _IEEE80211_NODE_H_ */