diff options
Diffstat (limited to 'package/kernel/mac80211/patches/335-mac80211-minstrel_ht-set-A-MSDU-tx-limits-based-on-s.patch')
| -rw-r--r-- | package/kernel/mac80211/patches/335-mac80211-minstrel_ht-set-A-MSDU-tx-limits-based-on-s.patch | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/335-mac80211-minstrel_ht-set-A-MSDU-tx-limits-based-on-s.patch b/package/kernel/mac80211/patches/335-mac80211-minstrel_ht-set-A-MSDU-tx-limits-based-on-s.patch new file mode 100644 index 0000000000..acaacf7cac --- /dev/null +++ b/package/kernel/mac80211/patches/335-mac80211-minstrel_ht-set-A-MSDU-tx-limits-based-on-s.patch @@ -0,0 +1,61 @@ +From: Felix Fietkau <nbd@openwrt.org> +Date: Thu, 18 Feb 2016 19:30:05 +0100 +Subject: [PATCH] mac80211: minstrel_ht: set A-MSDU tx limits based on selected + max_prob_rate + +Prevents excessive A-MSDU aggregation at low data rates or bad +conditions. + +Signed-off-by: Felix Fietkau <nbd@openwrt.org> +--- + +--- a/net/mac80211/rc80211_minstrel_ht.c ++++ b/net/mac80211/rc80211_minstrel_ht.c +@@ -883,6 +883,39 @@ minstrel_ht_set_rate(struct minstrel_pri + ratetbl->rate[offset].flags = flags; + } + ++static int ++minstrel_ht_get_max_amsdu_len(struct minstrel_ht_sta *mi) ++{ ++ int group = mi->max_prob_rate / MCS_GROUP_RATES; ++ const struct mcs_group *g = &minstrel_mcs_groups[group]; ++ int rate = mi->max_prob_rate % MCS_GROUP_RATES; ++ ++ /* Disable A-MSDU if max_prob_rate is bad */ ++ if (mi->groups[group].rates[rate].prob_ewma < MINSTREL_FRAC(50, 100)) ++ return 1; ++ ++ /* If the rate is slower than single-stream MCS1, make A-MSDU limit small */ ++ if (g->duration[rate] > MCS_DURATION(1, 0, 52)) ++ return 500; ++ ++ /* ++ * If the rate is slower than single-stream MCS4, limit A-MSDU to usual ++ * data packet size ++ */ ++ if (g->duration[rate] > MCS_DURATION(1, 0, 104)) ++ return 1500; ++ ++ /* ++ * If the rate is slower than single-stream MCS7, limit A-MSDU to twice ++ * the usual data packet size ++ */ ++ if (g->duration[rate] > MCS_DURATION(1, 0, 260)) ++ return 3000; ++ ++ /* unlimited */ ++ return 0; ++} ++ + static void + minstrel_ht_update_rates(struct minstrel_priv *mp, struct minstrel_ht_sta *mi) + { +@@ -907,6 +940,7 @@ minstrel_ht_update_rates(struct minstrel + minstrel_ht_set_rate(mp, mi, rates, i++, mi->max_prob_rate); + } + ++ mi->sta->max_rc_amsdu_len = minstrel_ht_get_max_amsdu_len(mi); + rates->rate[i].idx = -1; + rate_control_set_rates(mp->hw, mi->sta, rates); + } |