1 /* $OpenBSD: if_urtwn.c,v 1.16 2011/02/10 17:26:40 jakemsr Exp $ */
4 * Copyright (c) 2010 Damien Bergamini <damien.bergamini@free.fr>
5 * Copyright (c) 2014 Kevin Lo <kevlo@FreeBSD.org>
6 * Copyright (c) 2015-2016 Andriy Voskoboinyk <avos@FreeBSD.org>
8 * Permission to use, copy, modify, and distribute this software for any
9 * purpose with or without fee is hereby granted, provided that the above
10 * copyright notice and this permission notice appear in all copies.
12 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
13 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
14 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
15 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
16 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
17 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
18 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
23 #ifndef IF_RTWN_RIDX_H
24 #define IF_RTWN_RIDX_H
26 /* HW rate indices. */
27 #define RTWN_RIDX_CCK1 0
28 #define RTWN_RIDX_CCK2 1
29 #define RTWN_RIDX_CCK55 2
30 #define RTWN_RIDX_CCK11 3
31 #define RTWN_RIDX_OFDM6 4
32 #define RTWN_RIDX_OFDM9 5
33 #define RTWN_RIDX_OFDM12 6
34 #define RTWN_RIDX_OFDM18 7
35 #define RTWN_RIDX_OFDM24 8
36 #define RTWN_RIDX_OFDM36 9
37 #define RTWN_RIDX_OFDM48 10
38 #define RTWN_RIDX_OFDM54 11
40 #define RTWN_RIDX_HT_MCS_SHIFT 12
41 #define RTWN_RIDX_HT_MCS(i) (RTWN_RIDX_HT_MCS_SHIFT + (i))
43 #define RTWN_RIDX_COUNT 28
44 #define RTWN_RIDX_UNKNOWN (uint8_t)-1
46 #define RTWN_RATE_IS_CCK(rate) ((rate) <= RTWN_RIDX_CCK11)
47 #define RTWN_RATE_IS_OFDM(rate) \
48 ((rate) >= RTWN_RIDX_OFDM6 && (rate) != RTWN_RIDX_UNKNOWN)
51 static const uint8_t ridx2rate[] =
52 { 2, 4, 11, 22, 12, 18, 24, 36, 48, 72, 96, 108 };
54 static __inline uint8_t
55 rate2ridx(uint8_t rate)
57 if (rate & IEEE80211_RATE_MCS) {
58 return ((rate & 0xf) + RTWN_RIDX_HT_MCS_SHIFT);
75 default: return RTWN_RIDX_UNKNOWN;
79 /* XXX move to net80211 */
80 static __inline__ uint8_t
81 rtwn_ctl_mcsrate(const struct ieee80211_rate_table *rt, uint8_t ridx)
85 /* Check if we are using MCS rate. */
86 KASSERT(ridx >= RTWN_RIDX_HT_MCS(0) && ridx != RTWN_RIDX_UNKNOWN,
87 ("bad mcs rate index %d", ridx));
89 rate = (ridx - RTWN_RIDX_HT_MCS(0)) | IEEE80211_RATE_MCS;
90 cix = rt->info[rt->rateCodeToIndex[rate]].ctlRateIndex;
91 KASSERT(cix != (uint8_t)-1, ("rate %d (%d) has no info", rate, ridx));
92 return rt->info[cix].dot11Rate;
95 #endif /* IF_RTWN_RIDX_H */