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b3c69eef25
The stageqdepth (global, over all staging queues) was being kept incorrectly. It was being incremented whenever things were added, but only decremented during a flush. During active fast frames activity it wasn't being decremented, resulting in it always having a non-zero value during normal fast-frames operation. It was only used when checking if the aging queue should be checked; we may as well just defer to each of those staging queue counters (which look correct, thankfully.) Whilst I'm here, add locking assertions in the staging queue add/remove functions. The current crash shows that the staging queue has one frame, but only has a tail pointer set (the head pointer being set to NULL.) I'd like to grab a few more crashes where these locking assertions are in place so I can narrow down the issue between "somehow locking is messed up and things are racy" and "the stage queue head/tail pointer manipulation logic is subtly wrong." Tested: * AR5416 STA, AR5413 AP; with FastFrames enabled in the AR5416 HAL. PR: kern/174283
137 lines
4.9 KiB
C
137 lines
4.9 KiB
C
/*-
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* Copyright (c) 2009 Sam Leffler, Errno Consulting
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _NET80211_IEEE80211_SUPERG_H_
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#define _NET80211_IEEE80211_SUPERG_H_
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/*
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* Atheros' 802.11 SuperG protocol support.
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*/
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/*
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* Atheros advanced capability information element.
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*/
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struct ieee80211_ath_ie {
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uint8_t ath_id; /* IEEE80211_ELEMID_VENDOR */
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uint8_t ath_len; /* length in bytes */
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uint8_t ath_oui[3]; /* ATH_OUI */
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uint8_t ath_oui_type; /* ATH_OUI_TYPE */
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uint8_t ath_oui_subtype; /* ATH_OUI_SUBTYPE */
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uint8_t ath_version; /* spec revision */
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uint8_t ath_capability; /* capability info */
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#define ATHEROS_CAP_TURBO_PRIME 0x01 /* dynamic turbo--aka Turbo' */
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#define ATHEROS_CAP_COMPRESSION 0x02 /* data compression */
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#define ATHEROS_CAP_FAST_FRAME 0x04 /* fast (jumbo) frames */
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#define ATHEROS_CAP_XR 0x08 /* Xtended Range support */
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#define ATHEROS_CAP_AR 0x10 /* Advanded Radar support */
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#define ATHEROS_CAP_BURST 0x20 /* Bursting - not negotiated */
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#define ATHEROS_CAP_WME 0x40 /* CWMin tuning */
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#define ATHEROS_CAP_BOOST 0x80 /* use turbo/!turbo mode */
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uint8_t ath_defkeyix[2];
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} __packed;
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#define ATH_OUI_VERSION 0x00
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#define ATH_OUI_SUBTYPE 0x01
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#ifdef _KERNEL
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struct ieee80211_stageq {
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struct mbuf *head; /* frames linked w/ m_nextpkt */
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struct mbuf *tail; /* last frame in queue */
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int depth; /* # items on head */
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};
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struct ieee80211_superg {
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/* fast-frames staging q */
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struct ieee80211_stageq ff_stageq[WME_NUM_AC];
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};
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void ieee80211_superg_attach(struct ieee80211com *);
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void ieee80211_superg_detach(struct ieee80211com *);
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void ieee80211_superg_vattach(struct ieee80211vap *);
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void ieee80211_superg_vdetach(struct ieee80211vap *);
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uint8_t *ieee80211_add_ath(uint8_t *, uint8_t, ieee80211_keyix);
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uint8_t *ieee80211_add_athcaps(uint8_t *, const struct ieee80211_node *);
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void ieee80211_parse_ath(struct ieee80211_node *, uint8_t *);
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int ieee80211_parse_athparams(struct ieee80211_node *, uint8_t *,
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const struct ieee80211_frame *);
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void ieee80211_ff_node_init(struct ieee80211_node *);
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void ieee80211_ff_node_cleanup(struct ieee80211_node *);
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struct mbuf *ieee80211_ff_check(struct ieee80211_node *, struct mbuf *);
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void ieee80211_ff_age(struct ieee80211com *, struct ieee80211_stageq *,
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int quanta);
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/*
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* See ieee80211_ff_age() for a description of the locking
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* expectation here.
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*/
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static __inline void
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ieee80211_ff_flush(struct ieee80211com *ic, int ac)
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{
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struct ieee80211_superg *sg = ic->ic_superg;
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if (sg != NULL && sg->ff_stageq[ac].depth)
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ieee80211_ff_age(ic, &sg->ff_stageq[ac], 0x7fffffff);
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}
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/*
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* See ieee80211_ff_age() for a description of the locking
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* expectation here.
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*/
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static __inline void
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ieee80211_ff_age_all(struct ieee80211com *ic, int quanta)
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{
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struct ieee80211_superg *sg = ic->ic_superg;
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if (sg != NULL) {
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if (sg->ff_stageq[WME_AC_VO].depth)
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ieee80211_ff_age(ic, &sg->ff_stageq[WME_AC_VO], quanta);
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if (sg->ff_stageq[WME_AC_VI].depth)
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ieee80211_ff_age(ic, &sg->ff_stageq[WME_AC_VI], quanta);
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if (sg->ff_stageq[WME_AC_BE].depth)
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ieee80211_ff_age(ic, &sg->ff_stageq[WME_AC_BE], quanta);
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if (sg->ff_stageq[WME_AC_BK].depth)
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ieee80211_ff_age(ic, &sg->ff_stageq[WME_AC_BK], quanta);
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}
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}
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struct mbuf *ieee80211_ff_encap(struct ieee80211vap *, struct mbuf *,
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int, struct ieee80211_key *);
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struct mbuf *ieee80211_ff_decap(struct ieee80211_node *, struct mbuf *);
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static __inline struct mbuf *
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ieee80211_decap_fastframe(struct ieee80211vap *vap, struct ieee80211_node *ni,
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struct mbuf *m)
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{
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return IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ?
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ieee80211_ff_decap(ni, m) : m;
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}
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#endif /* _KERNEL */
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#endif /* _NET80211_IEEE80211_SUPERG_H_ */
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