if_rtwn_ridx.h

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    1 /*      $OpenBSD: if_urtwn.c,v 1.16 2011/02/10 17:26:40 jakemsr Exp $   */
    2 
    3 /*-
    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>
    7  *
    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.
   11  *
   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.
   19  *
   20  * $FreeBSD$
   21  */
   22 
   23 #ifndef IF_RTWN_RIDX_H
   24 #define IF_RTWN_RIDX_H
   25 
   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
   39 
   40 #define RTWN_RIDX_HT_MCS_SHIFT  12
   41 #define RTWN_RIDX_HT_MCS(i)     (RTWN_RIDX_HT_MCS_SHIFT + (i))
   42 
   43 #define RTWN_RIDX_COUNT         28
   44 #define RTWN_RIDX_UNKNOWN       (uint8_t)-1
   45 
   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)
   49 
   50 static const uint8_t ridx2rate[] =
   51         { 2, 4, 11, 22, 12, 18, 24, 36, 48, 72, 96, 108 };
   52 
   53 static __inline uint8_t
   54 rate2ridx(uint8_t rate)
   55 {
   56         if (rate & IEEE80211_RATE_MCS) {
   57                 return ((rate & 0xf) + RTWN_RIDX_HT_MCS_SHIFT);
   58         }
   59         switch (rate) {
   60         /* 11g */
   61         case 12:        return 4;
   62         case 18:        return 5;
   63         case 24:        return 6;
   64         case 36:        return 7;
   65         case 48:        return 8;
   66         case 72:        return 9;
   67         case 96:        return 10;
   68         case 108:       return 11;
   69         /* 11b */
   70         case 2:         return 0;
   71         case 4:         return 1;
   72         case 11:        return 2;
   73         case 22:        return 3;
   74         default:        return RTWN_RIDX_UNKNOWN;
   75         }
   76 }
   77 
   78 /* XXX move to net80211 */
   79 static __inline__ uint8_t
   80 rtwn_ctl_mcsrate(const struct ieee80211_rate_table *rt, uint8_t ridx)
   81 {
   82         uint8_t cix, rate;
   83 
   84         /* Check if we are using MCS rate. */
   85         KASSERT(ridx >= RTWN_RIDX_HT_MCS(0) && ridx != RTWN_RIDX_UNKNOWN,
   86             ("bad mcs rate index %d", ridx));
   87 
   88         rate = (ridx - RTWN_RIDX_HT_MCS(0)) | IEEE80211_RATE_MCS;
   89         cix = rt->info[rt->rateCodeToIndex[rate]].ctlRateIndex;
   90         KASSERT(cix != (uint8_t)-1, ("rate %d (%d) has no info", rate, ridx));
   91         return rt->info[cix].dot11Rate;
   92 }
   93 
   94 #endif  /* IF_RTWN_RIDX_H */

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FreeBSD/Linux Kernel Cross Reference sys/dev/rtwn/if_rtwn_ridx.h

FreeBSD/Linux Kernel Cross Reference
sys/dev/rtwn/if_rtwn_ridx.h