56 lines
2.4 KiB
C
56 lines
2.4 KiB
C
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/*-
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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_TDMA_H__
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#define __IF_ATH_TDMA_H__
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#define TDMA_EP_MULTIPLIER (1<<10) /* pow2 to optimize out * and / */
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#define TDMA_LPF_LEN 6
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#define TDMA_DUMMY_MARKER 0x127
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#define TDMA_EP_MUL(x, mul) ((x) * (mul))
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#define TDMA_IN(x) (TDMA_EP_MUL((x), TDMA_EP_MULTIPLIER))
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#define TDMA_LPF(x, y, len) \
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((x != TDMA_DUMMY_MARKER) ? (((x) * ((len)-1) + (y)) / (len)) : (y))
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#define TDMA_SAMPLE(x, y) do { \
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x = TDMA_LPF((x), TDMA_IN(y), TDMA_LPF_LEN); \
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} while (0)
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#define TDMA_EP_RND(x,mul) \
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((((x)%(mul)) >= ((mul)/2)) ? \
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((x) + ((mul) - 1)) / (mul) : (x)/(mul))
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#define TDMA_AVG(x) TDMA_EP_RND(x, TDMA_EP_MULTIPLIER)
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extern void ath_tdma_config(struct ath_softc *sc, struct ieee80211vap *vap);
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extern void ath_tdma_update(struct ieee80211_node *ni,
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const struct ieee80211_tdma_param *tdma, int changed);
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extern void ath_tdma_beacon_send(struct ath_softc *sc,
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struct ieee80211vap *vap);
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#endif
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