a108d2d6c6
This showed up when doing heavy UDP throughput on SMP machines.
The problem with this is because the 802.11 sequence number is being
allocated separately to the CCMP PN replay number (which is assigned
during ieee80211_crypto_encap()).
Under significant throughput (200+ MBps) the TX path would be stressed
enough that frame TX/retry would force sequence number and PN allocation
to be out of order. So once the frames were reordered via 802.11 seqnos,
the CCMP PN would be far out of order, causing most frames to be discarded
by the receiver.
I've fixed this in some local work by being forced to:
(a) deal with the issues that lead to the parallel TX causing out of
order sequence numbers in the first place;
(b) fix all the packet queuing issues which lead to strange (but mostly
valid) TX.
I'll begin fixing these in a subsequent commit or five.
PR: kern/166190
128 lines
4.9 KiB
C
128 lines
4.9 KiB
C
/*-
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* Copyright (c) 2002-2009 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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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
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* redistribution must be conditioned upon including a substantially
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* similar Disclaimer requirement for further binary redistribution.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
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* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGES.
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*
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* $FreeBSD$
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*/
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#ifndef __IF_ATH_TX_H__
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#define __IF_ATH_TX_H__
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/*
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* some general macros
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*/
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#define INCR(_l, _sz) (_l) ++; (_l) &= ((_sz) - 1)
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/*
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* return block-ack bitmap index given sequence and starting sequence
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*/
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#define ATH_BA_INDEX(_st, _seq) (((_seq) - (_st)) & (IEEE80211_SEQ_RANGE - 1))
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#define WME_BA_BMP_SIZE 64
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#define WME_MAX_BA WME_BA_BMP_SIZE
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/*
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* How 'busy' to try and keep the hardware txq
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*/
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#define ATH_AGGR_MIN_QDEPTH 2
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/*
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* Watermark for scheduling TIDs in order to maximise aggregation.
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*
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* If hwq_depth is greater than this, don't schedule the TID
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* for packet scheduling - the hardware is already busy servicing
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* this TID.
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*
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* If hwq_depth is less than this, schedule the TID for packet
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* scheduling in the completion handler.
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*/
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#define ATH_AGGR_SCHED_HIGH 4
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#define ATH_AGGR_SCHED_LOW 2
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/*
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* return whether a bit at index _n in bitmap _bm is set
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* _sz is the size of the bitmap
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*/
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#define ATH_BA_ISSET(_bm, _n) (((_n) < (WME_BA_BMP_SIZE)) && \
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((_bm)[(_n) >> 5] & (1 << ((_n) & 31))))
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/* extracting the seqno from buffer seqno */
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#define SEQNO(_a) ((_a) >> IEEE80211_SEQ_SEQ_SHIFT)
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/*
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* Whether the current sequence number is within the
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* BAW.
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*/
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#define BAW_WITHIN(_start, _bawsz, _seqno) \
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((((_seqno) - (_start)) & 4095) < (_bawsz))
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extern void ath_txq_restart_dma(struct ath_softc *sc, struct ath_txq *txq);
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extern void ath_freetx(struct mbuf *m);
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extern void ath_tx_node_flush(struct ath_softc *sc, struct ath_node *an);
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extern void ath_tx_txq_drain(struct ath_softc *sc, struct ath_txq *txq);
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extern void ath_txfrag_cleanup(struct ath_softc *sc, ath_bufhead *frags,
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struct ieee80211_node *ni);
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extern int ath_txfrag_setup(struct ath_softc *sc, ath_bufhead *frags,
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struct mbuf *m0, struct ieee80211_node *ni);
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extern int ath_tx_start(struct ath_softc *sc, struct ieee80211_node *ni,
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struct ath_buf *bf, struct mbuf *m0);
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extern int ath_raw_xmit(struct ieee80211_node *ni, struct mbuf *m,
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const struct ieee80211_bpf_params *params);
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/* software queue stuff */
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extern void ath_tx_swq(struct ath_softc *sc, struct ieee80211_node *ni,
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struct ath_txq *txq, struct ath_buf *bf);
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extern void ath_tx_tid_init(struct ath_softc *sc, struct ath_node *an);
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extern void ath_tx_tid_hw_queue_aggr(struct ath_softc *sc, struct ath_node *an,
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struct ath_tid *tid);
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extern void ath_tx_tid_hw_queue_norm(struct ath_softc *sc, struct ath_node *an,
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struct ath_tid *tid);
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extern void ath_txq_sched(struct ath_softc *sc, struct ath_txq *txq);
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extern void ath_tx_normal_comp(struct ath_softc *sc, struct ath_buf *bf,
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int fail);
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extern void ath_tx_aggr_comp(struct ath_softc *sc, struct ath_buf *bf,
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int fail);
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extern void ath_tx_addto_baw(struct ath_softc *sc, struct ath_node *an,
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struct ath_tid *tid, struct ath_buf *bf);
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extern struct ieee80211_tx_ampdu * ath_tx_get_tx_tid(struct ath_node *an,
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int tid);
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/* TX addba handling */
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extern int ath_addba_request(struct ieee80211_node *ni,
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struct ieee80211_tx_ampdu *tap, int dialogtoken,
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int baparamset, int batimeout);
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extern int ath_addba_response(struct ieee80211_node *ni,
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struct ieee80211_tx_ampdu *tap, int dialogtoken,
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int code, int batimeout);
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extern void ath_addba_stop(struct ieee80211_node *ni,
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struct ieee80211_tx_ampdu *tap);
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extern void ath_bar_response(struct ieee80211_node *ni,
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struct ieee80211_tx_ampdu *tap, int status);
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extern void ath_addba_response_timeout(struct ieee80211_node *ni,
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struct ieee80211_tx_ampdu *tap);
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#endif
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