diff options
Diffstat (limited to 'freebsd/sys/dev/rtwn/if_rtwn_ridx.h')
| -rw-r--r-- | freebsd/sys/dev/rtwn/if_rtwn_ridx.h | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/freebsd/sys/dev/rtwn/if_rtwn_ridx.h b/freebsd/sys/dev/rtwn/if_rtwn_ridx.h new file mode 100644 index 00000000..eef43898 --- /dev/null +++ b/freebsd/sys/dev/rtwn/if_rtwn_ridx.h @@ -0,0 +1,94 @@ +/* $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_MCS(i) (12 + (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) { + /* 11n rates start at idx 12 */ + return ((rate & 0xf) + 12); + } + 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_MCS(0) && ridx != RTWN_RIDX_UNKNOWN, + ("bad mcs rate index %d", ridx)); + + rate = (ridx - RTWN_RIDX_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 */ |