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