diff options
Diffstat (limited to 'net/mac80211/rc80211_minstrel_ht.c')
| -rw-r--r-- | net/mac80211/rc80211_minstrel_ht.c | 87 |
1 files changed, 59 insertions, 28 deletions
diff --git a/net/mac80211/rc80211_minstrel_ht.c b/net/mac80211/rc80211_minstrel_ht.c index 165a4518bb48..c06aa3ac6b9d 100644 --- a/net/mac80211/rc80211_minstrel_ht.c +++ b/net/mac80211/rc80211_minstrel_ht.c @@ -259,7 +259,7 @@ minstrel_ht_update_stats(struct minstrel_priv *mp, struct minstrel_ht_sta *mi) } } - /* try to sample up to half of the availble rates during each interval */ + /* try to sample up to half of the available rates during each interval */ mi->sample_count *= 4; cur_prob = 0; @@ -415,10 +415,8 @@ minstrel_ht_tx_status(void *priv, struct ieee80211_supported_band *sband, mi->sample_count--; } - if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE) { + if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE) mi->sample_packets += info->status.ampdu_len; - minstrel_next_sample_idx(mi); - } for (i = 0; !last; i++) { last = (i == IEEE80211_TX_MAX_RATES - 1) || @@ -519,9 +517,7 @@ minstrel_ht_set_rate(struct minstrel_priv *mp, struct minstrel_ht_sta *mi, rate->count = mr->retry_count; rate->flags = IEEE80211_TX_RC_MCS | group->flags; - if (txrc->short_preamble) - rate->flags |= IEEE80211_TX_RC_USE_SHORT_PREAMBLE; - if (txrc->rts || rtscts) + if (rtscts) rate->flags |= IEEE80211_TX_RC_USE_RTS_CTS; rate->idx = index % MCS_GROUP_RATES + (group->streams - 1) * MCS_GROUP_RATES; } @@ -553,13 +549,14 @@ minstrel_get_sample_rate(struct minstrel_priv *mp, struct minstrel_ht_sta *mi) sample_idx = sample_table[mg->column][mg->index]; mr = &mg->rates[sample_idx]; sample_idx += mi->sample_group * MCS_GROUP_RATES; + minstrel_next_sample_idx(mi); /* * When not using MRR, do not sample if the probability is already * higher than 95% to avoid wasting airtime */ if (!mp->has_mrr && (mr->probability > MINSTREL_FRAC(95, 100))) - goto next; + return -1; /* * Make sure that lower rates get sampled only occasionally, @@ -568,17 +565,13 @@ minstrel_get_sample_rate(struct minstrel_priv *mp, struct minstrel_ht_sta *mi) if (minstrel_get_duration(sample_idx) > minstrel_get_duration(mi->max_tp_rate)) { if (mr->sample_skipped < 20) - goto next; + return -1; if (mi->sample_slow++ > 2) - goto next; + return -1; } return sample_idx; - -next: - minstrel_next_sample_idx(mi); - return -1; } static void @@ -605,19 +598,46 @@ minstrel_ht_get_rate(void *priv, struct ieee80211_sta *sta, void *priv_sta, sample = true; minstrel_ht_set_rate(mp, mi, &ar[0], sample_idx, txrc, true, false); - minstrel_ht_set_rate(mp, mi, &ar[1], mi->max_tp_rate, - txrc, false, false); info->flags |= IEEE80211_TX_CTL_RATE_CTRL_PROBE; } else { minstrel_ht_set_rate(mp, mi, &ar[0], mi->max_tp_rate, txrc, false, false); - minstrel_ht_set_rate(mp, mi, &ar[1], mi->max_tp_rate2, - txrc, false, true); } - minstrel_ht_set_rate(mp, mi, &ar[2], mi->max_prob_rate, txrc, false, !sample); - ar[3].count = 0; - ar[3].idx = -1; + if (mp->hw->max_rates >= 3) { + /* + * At least 3 tx rates supported, use + * sample_rate -> max_tp_rate -> max_prob_rate for sampling and + * max_tp_rate -> max_tp_rate2 -> max_prob_rate by default. + */ + if (sample_idx >= 0) + minstrel_ht_set_rate(mp, mi, &ar[1], mi->max_tp_rate, + txrc, false, false); + else + minstrel_ht_set_rate(mp, mi, &ar[1], mi->max_tp_rate2, + txrc, false, true); + + minstrel_ht_set_rate(mp, mi, &ar[2], mi->max_prob_rate, + txrc, false, !sample); + + ar[3].count = 0; + ar[3].idx = -1; + } else if (mp->hw->max_rates == 2) { + /* + * Only 2 tx rates supported, use + * sample_rate -> max_prob_rate for sampling and + * max_tp_rate -> max_prob_rate by default. + */ + minstrel_ht_set_rate(mp, mi, &ar[1], mi->max_prob_rate, + txrc, false, !sample); + + ar[2].count = 0; + ar[2].idx = -1; + } else { + /* Not using MRR, only use the first rate */ + ar[1].count = 0; + ar[1].idx = -1; + } mi->total_packets++; @@ -639,18 +659,14 @@ minstrel_ht_update_caps(void *priv, struct ieee80211_supported_band *sband, struct ieee80211_mcs_info *mcs = &sta->ht_cap.mcs; struct ieee80211_local *local = hw_to_local(mp->hw); u16 sta_cap = sta->ht_cap.cap; + int n_supported = 0; int ack_dur; int stbc; int i; /* fall back to the old minstrel for legacy stations */ - if (!sta->ht_cap.ht_supported) { - msp->is_ht = false; - memset(&msp->legacy, 0, sizeof(msp->legacy)); - msp->legacy.r = msp->ratelist; - msp->legacy.sample_table = msp->sample_table; - return mac80211_minstrel.rate_init(priv, sband, sta, &msp->legacy); - } + if (!sta->ht_cap.ht_supported) + goto use_legacy; BUILD_BUG_ON(ARRAY_SIZE(minstrel_mcs_groups) != MINSTREL_MAX_STREAMS * MINSTREL_STREAM_GROUPS); @@ -705,7 +721,22 @@ minstrel_ht_update_caps(void *priv, struct ieee80211_supported_band *sband, mi->groups[i].supported = mcs->rx_mask[minstrel_mcs_groups[i].streams - 1]; + + if (mi->groups[i].supported) + n_supported++; } + + if (!n_supported) + goto use_legacy; + + return; + +use_legacy: + msp->is_ht = false; + memset(&msp->legacy, 0, sizeof(msp->legacy)); + msp->legacy.r = msp->ratelist; + msp->legacy.sample_table = msp->sample_table; + return mac80211_minstrel.rate_init(priv, sband, sta, &msp->legacy); } static void |