2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting
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33 #ifndef __IF_ATH_TDMA_H__
34 #define __IF_ATH_TDMA_H__
36 #define TDMA_EP_MULTIPLIER (1<<10) /* pow2 to optimize out * and / */
37 #define TDMA_LPF_LEN 6
38 #define TDMA_DUMMY_MARKER 0x127
39 #define TDMA_EP_MUL(x, mul) ((x) * (mul))
40 #define TDMA_IN(x) (TDMA_EP_MUL((x), TDMA_EP_MULTIPLIER))
41 #define TDMA_LPF(x, y, len) \
42 ((x != TDMA_DUMMY_MARKER) ? (((x) * ((len)-1) + (y)) / (len)) : (y))
43 #define TDMA_SAMPLE(x, y) do { \
44 x = TDMA_LPF((x), TDMA_IN(y), TDMA_LPF_LEN); \
46 #define TDMA_EP_RND(x,mul) \
47 ((((x)%(mul)) >= ((mul)/2)) ? \
48 ((x) + ((mul) - 1)) / (mul) : (x)/(mul))
49 #define TDMA_AVG(x) TDMA_EP_RND(x, TDMA_EP_MULTIPLIER)
51 extern void ath_tdma_config(struct ath_softc *sc, struct ieee80211vap *vap);
52 extern void ath_tdma_update(struct ieee80211_node *ni,
53 const struct ieee80211_tdma_param *tdma, int changed);
54 extern void ath_tdma_beacon_send(struct ath_softc *sc,
55 struct ieee80211vap *vap);