mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-25 08:21:14 +00:00
62 lines
1.7 KiB
Diff
62 lines
1.7 KiB
Diff
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);
|
|
}
|