The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/net80211/ieee80211_power.h

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    1 /*-
    2  * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   15  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   16  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   17  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   18  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   19  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   20  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   21  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   23  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   24  *
   25  * $FreeBSD: releng/11.0/sys/net80211/ieee80211_power.h 264855 2014-04-24 01:39:53Z adrian $
   26  */
   27 #ifndef _NET80211_IEEE80211_POWER_H_
   28 #define _NET80211_IEEE80211_POWER_H_
   29 
   30 struct ieee80211com;
   31 struct ieee80211vap;
   32 struct ieee80211_node;
   33 struct mbuf;
   34 
   35 /*
   36  * Power save packet queues.  There are two queues, one
   37  * for frames coming from the net80211 layer and the other
   38  * for frames that come from the driver. Frames from the
   39  * driver are expected to have M_ENCAP marked to indicate
   40  * they have already been encapsulated and are treated as
   41  * higher priority: they are sent first when flushing the
   42  * queue on a power save state change or in response to a
   43  * ps-poll frame.
   44  *
   45  * Note that frames sent from the high priority queue are
   46  * fed directly to the driver without going through
   47  * ieee80211_start again; drivers that send up encap'd
   48  * frames are required to handle them when they come back.
   49  */
   50 struct ieee80211_psq {
   51         ieee80211_psq_lock_t psq_lock;
   52         int     psq_len;
   53         int     psq_maxlen;
   54         int     psq_drops;
   55         struct ieee80211_psq_head {
   56                 struct mbuf *head;
   57                 struct mbuf *tail;
   58                 int len;
   59         } psq_head[2];                  /* 2 priorities */
   60 };
   61 
   62 void    ieee80211_psq_init(struct ieee80211_psq *, const char *);
   63 void    ieee80211_psq_cleanup(struct ieee80211_psq *);
   64 
   65 void    ieee80211_power_attach(struct ieee80211com *);
   66 void    ieee80211_power_detach(struct ieee80211com *);
   67 void    ieee80211_power_vattach(struct ieee80211vap *);
   68 void    ieee80211_power_vdetach(struct ieee80211vap *);
   69 void    ieee80211_power_latevattach(struct ieee80211vap *);
   70 
   71 struct mbuf *ieee80211_node_psq_dequeue(struct ieee80211_node *ni, int *qlen);
   72 int     ieee80211_node_psq_drain(struct ieee80211_node *);
   73 int     ieee80211_node_psq_age(struct ieee80211_node *);
   74 
   75 /*
   76  * Don't call these directly from the stack; they are vap methods
   77  * that should be overridden.
   78  */
   79 int     ieee80211_pwrsave(struct ieee80211_node *, struct mbuf *);
   80 void    ieee80211_node_pwrsave(struct ieee80211_node *, int enable);
   81 void    ieee80211_sta_pwrsave(struct ieee80211vap *, int enable);
   82 void    ieee80211_sta_tim_notify(struct ieee80211vap *vap, int set);
   83 void    ieee80211_sta_ps_timer_check(struct ieee80211vap *vap);
   84 
   85 /* XXX what's this? */
   86 void    ieee80211_power_poll(struct ieee80211com *);
   87 #endif /* _NET80211_IEEE80211_POWER_H_ */

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