95 lines
2.7 KiB
C
95 lines
2.7 KiB
C
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/* $OpenBSD: if_urtwn.c,v 1.16 2011/02/10 17:26:40 jakemsr Exp $ */
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/*-
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* Copyright (c) 2010 Damien Bergamini <damien.bergamini@free.fr>
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* Copyright (c) 2014 Kevin Lo <kevlo@FreeBSD.org>
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* Copyright (c) 2015-2016 Andriy Voskoboinyk <avos@FreeBSD.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* $FreeBSD$
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*/
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#ifndef IF_RTWN_RIDX_H
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#define IF_RTWN_RIDX_H
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/* HW rate indices. */
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#define RTWN_RIDX_CCK1 0
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#define RTWN_RIDX_CCK2 1
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#define RTWN_RIDX_CCK55 2
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#define RTWN_RIDX_CCK11 3
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#define RTWN_RIDX_OFDM6 4
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#define RTWN_RIDX_OFDM9 5
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#define RTWN_RIDX_OFDM12 6
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#define RTWN_RIDX_OFDM18 7
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#define RTWN_RIDX_OFDM24 8
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#define RTWN_RIDX_OFDM36 9
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#define RTWN_RIDX_OFDM48 10
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#define RTWN_RIDX_OFDM54 11
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#define RTWN_RIDX_MCS(i) (12 + (i))
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#define RTWN_RIDX_COUNT 28
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#define RTWN_RIDX_UNKNOWN (uint8_t)-1
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#define RTWN_RATE_IS_CCK(rate) ((rate) <= RTWN_RIDX_CCK11)
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#define RTWN_RATE_IS_OFDM(rate) \
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((rate) >= RTWN_RIDX_OFDM6 && (rate) != RTWN_RIDX_UNKNOWN)
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static const uint8_t ridx2rate[] =
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{ 2, 4, 11, 22, 12, 18, 24, 36, 48, 72, 96, 108 };
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static __inline uint8_t
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rate2ridx(uint8_t rate)
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{
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if (rate & IEEE80211_RATE_MCS) {
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/* 11n rates start at idx 12 */
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return ((rate & 0xf) + 12);
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}
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switch (rate) {
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/* 11g */
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case 12: return 4;
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case 18: return 5;
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case 24: return 6;
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case 36: return 7;
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case 48: return 8;
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case 72: return 9;
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case 96: return 10;
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case 108: return 11;
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/* 11b */
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case 2: return 0;
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case 4: return 1;
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case 11: return 2;
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case 22: return 3;
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default: return RTWN_RIDX_UNKNOWN;
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}
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}
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/* XXX move to net80211 */
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static __inline__ uint8_t
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rtwn_ctl_mcsrate(const struct ieee80211_rate_table *rt, uint8_t ridx)
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{
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uint8_t cix, rate;
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/* Check if we are using MCS rate. */
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KASSERT(ridx >= RTWN_RIDX_MCS(0) && ridx != RTWN_RIDX_UNKNOWN,
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("bad mcs rate index %d", ridx));
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rate = (ridx - RTWN_RIDX_MCS(0)) | IEEE80211_RATE_MCS;
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cix = rt->info[rt->rateCodeToIndex[rate]].ctlRateIndex;
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KASSERT(cix != (uint8_t)-1, ("rate %d (%d) has no info", rate, ridx));
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return rt->info[cix].dot11Rate;
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}
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#endif /* IF_RTWN_RIDX_H */
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