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  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   26  *
   27  * $FreeBSD: stable/12/sys/net80211/ieee80211_power.h 326272 2017-11-27 15:23:17Z pfg $
   28  */
   29 #ifndef _NET80211_IEEE80211_POWER_H_
   30 #define _NET80211_IEEE80211_POWER_H_
   31 
   32 struct ieee80211com;
   33 struct ieee80211vap;
   34 struct ieee80211_node;
   35 struct mbuf;
   36 
   37 /*
   38  * Power save packet queues.  There are two queues, one
   39  * for frames coming from the net80211 layer and the other
   40  * for frames that come from the driver. Frames from the
   41  * driver are expected to have M_ENCAP marked to indicate
   42  * they have already been encapsulated and are treated as
   43  * higher priority: they are sent first when flushing the
   44  * queue on a power save state change or in response to a
   45  * ps-poll frame.
   46  *
   47  * Note that frames sent from the high priority queue are
   48  * fed directly to the driver without going through
   49  * ieee80211_start again; drivers that send up encap'd
   50  * frames are required to handle them when they come back.
   51  */
   52 struct ieee80211_psq {
   53         ieee80211_psq_lock_t psq_lock;
   54         int     psq_len;
   55         int     psq_maxlen;
   56         int     psq_drops;
   57         struct ieee80211_psq_head {
   58                 struct mbuf *head;
   59                 struct mbuf *tail;
   60                 int len;
   61         } psq_head[2];                  /* 2 priorities */
   62 };
   63 
   64 void    ieee80211_psq_init(struct ieee80211_psq *, const char *);
   65 void    ieee80211_psq_cleanup(struct ieee80211_psq *);
   66 
   67 void    ieee80211_power_attach(struct ieee80211com *);
   68 void    ieee80211_power_detach(struct ieee80211com *);
   69 void    ieee80211_power_vattach(struct ieee80211vap *);
   70 void    ieee80211_power_vdetach(struct ieee80211vap *);
   71 void    ieee80211_power_latevattach(struct ieee80211vap *);
   72 
   73 struct mbuf *ieee80211_node_psq_dequeue(struct ieee80211_node *ni, int *qlen);
   74 int     ieee80211_node_psq_drain(struct ieee80211_node *);
   75 int     ieee80211_node_psq_age(struct ieee80211_node *);
   76 
   77 /*
   78  * Don't call these directly from the stack; they are vap methods
   79  * that should be overridden.
   80  */
   81 int     ieee80211_pwrsave(struct ieee80211_node *, struct mbuf *);
   82 void    ieee80211_node_pwrsave(struct ieee80211_node *, int enable);
   83 void    ieee80211_sta_pwrsave(struct ieee80211vap *, int enable);
   84 void    ieee80211_sta_tim_notify(struct ieee80211vap *vap, int set);
   85 void    ieee80211_sta_ps_timer_check(struct ieee80211vap *vap);
   86 
   87 /* XXX what's this? */
   88 void    ieee80211_power_poll(struct ieee80211com *);
   89 #endif /* _NET80211_IEEE80211_POWER_H_ */

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