1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2002-2009 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 * without modification. 13 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 14 * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any 15 * redistribution must be conditioned upon including a substantially 16 * similar Disclaimer requirement for further binary redistribution. 17 * 18 * NO WARRANTY 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY 22 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 23 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, 24 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 27 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 29 * THE POSSIBILITY OF SUCH DAMAGES. 30 * 31 * $FreeBSD$ 32 */ 33 #ifndef __IF_ATH_TDMA_H__ 34 #define __IF_ATH_TDMA_H__ 35 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); \ 45 } while (0) 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) 50 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); 56 57 #endif 58