package/madwifi/patches/345-minstrel_sampling.patch

   1 --- a/ath/if_ath.c
   2 +++ b/ath/if_ath.c
   3 @@ -8103,6 +8103,7 @@ ath_tx_start(struct net_device *dev, str
   4                 ath_hal_setupxtxdesc(sc->sc_ah, ds, mrr.rate1, mrr.retries1,
   5                                      mrr.rate2, mrr.retries2,
   6                                      mrr.rate3, mrr.retries3);
   7 +               bf->rcflags = mrr.privflags;
   8         }
   9
  10  #ifndef ATH_SUPERG_FF
  11 --- a/ath/if_athvar.h
  12 +++ b/ath/if_athvar.h
  13 @@ -446,6 +446,7 @@ struct ath_buf {
  14         u_int16_t bf_flags;                             /* tx descriptor flags */
  15         u_int64_t bf_tsf;
  16         int16_t bf_channoise;
  17 +       unsigned int rcflags;
  18  #ifdef ATH_SUPERG_FF
  19         /* XXX: combine this with bf_skbaddr if it ever changes to accommodate
  20          *      multiple segments.
  21 --- a/ath_rate/minstrel/minstrel.c
  22 +++ b/ath_rate/minstrel/minstrel.c
  23 @@ -333,15 +333,19 @@ ath_rate_findrate(struct ath_softc *sc,
  24                 if (sn->static_rate_ndx >= 0) {
  25                             ndx = sn->static_rate_ndx;
  26                 } else {
  27 +                       int delta;
  28                         sn->packet_count++;
  29                         sn->random_n = (sn->a * sn->random_n) + sn->b;
  30                         offset = sn->random_n & 0xf;
  31 -                       if ((((100 * sn->sample_count) / (sn->sample_count + sn->packet_count)) < ath_lookaround_rate) && (offset < 2)) {
  32 +                       delta = (sn->packet_count * ath_lookaround_rate / 100) - sn->sample_count;
  33 +                       if ((delta > 0) && (offset < 2)) {
  34                                 sn->sample_count++;
  35                                 sn->is_sampling = 1;
  36                                 if (sn->packet_count >= 10000) {
  37                                         sn->sample_count = 0;
  38                                         sn->packet_count = 0;
  39 +                               } else if (delta > sn->num_rates * 2) {
  40 +                                       sn->sample_count += ((delta - sn->num_rates * 2) * ath_lookaround_rate) / 100;
  41                                 }
  42
  43                                 /* Don't look for slowest rate (i.e. slowest
  44 @@ -398,11 +402,14 @@ ath_rate_get_mrr(struct ath_softc *sc, s
  45                 if (sn->num_rates <= 0)
  46                         return;
  47
  48 +               mrr->privflags = sn->is_sampling;
  49                 if (sn->is_sampling) {
  50                         sn->is_sampling = 0;
  51 -                       if (sn->rs_sample_rate_slower)
  52 +                       if (sn->rs_sample_rate_slower) {
  53                                 rc1 = sn->rs_sample_rate;
  54 -                       else
  55 +                               if (sn->sample_count > 0)
  56 +                                       sn->sample_count--;
  57 +                       } else
  58                                 rc1 = sn->max_tp_rate;
  59                 } else {
  60                         rc1 = sn->max_tp_rate2;
  61 @@ -525,6 +532,9 @@ ath_rate_tx_complete(struct ath_softc *s
  62                 if (tries <= tries1)
  63                         return;
  64
  65 +               if (bf->rcflags)
  66 +                       sn->sample_count++;
  67 +
  68                 if  (tries2 < 0)
  69                         return;
  70                 tries = tries - tries1;
  71 --- a/net80211/ieee80211_rate.h
  72 +++ b/net80211/ieee80211_rate.h
  73 @@ -87,6 +87,7 @@ struct ieee80211_mrr {
  74         int retries2;
  75         int rate3;
  76         int retries3;
  77 +       int privflags;
  78  };
  79
  80  struct ieee80211_rate_ops {