This patch enables netifd to query 802.11ac-driver for the maximum
supported A-MPDU length exponent, possibly increasing VHT throughput by
more aggressive frame aggregation.
v2: refreshed patch
Signed-off-by: Matti Laakso <malaakso at elisanet.fi>
---
diff --git a/package/kernel/mac80211/files/lib/netifd/wireless/mac80211.sh
b/package/kernel/mac80211/files/lib/netifd/wireless/mac80211.sh
index 00c2108..dc9a43a 100644
--- a/package/kernel/mac80211/files/lib/netifd/wireless/mac80211.sh
+++ b/package/kernel/mac80211/files/lib/netifd/wireless/mac80211.sh
@@ -36,7 +36,7 @@ drv_mac80211_init_device_config() {
htc_vht \
rx_antenna_pattern \
tx_antenna_pattern
- config_add_int vht_max_mpdu vht_max_rx_stbc vht_link_adapt vht160
+ config_add_int vht_max_a_mpdu_len_exp vht_max_mpdu vht_max_rx_stbc
vht_link_adapt vht160
}
drv_mac80211_init_iface_config() {
@@ -201,6 +201,7 @@ mac80211_hostapd_setup_base() {
htc_vht:1 \
rx_antenna_pattern:1 \
tx_antenna_pattern:1 \
+ vht_max_a_mpdu_len_exp:7 \
vht_max_mpdu:11454 \
rx_stbc:4 \
vht_link_adapt:3 \
@@ -251,6 +252,24 @@ mac80211_hostapd_setup_base() {
vht_max_mpdu_hw=11454
[ "$vht_max_mpdu_hw" != 3895 ] && \
vht_capab="$vht_capab[MAX-MPDU-$vht_max_mpdu_hw]"
+
+ # maximum A-MPDU length exponent
+ vht_max_a_mpdu_len_exp_hw=0
+ [ "$(($vht_cap & 58720256))" -ge 8388608 -a 1 -le
"$vht_max_a_mpdu_len_exp" ] && \
+ vht_max_a_mpdu_len_exp_hw=1
+ [ "$(($vht_cap & 58720256))" -ge 16777216 -a 2 -le
"$vht_max_a_mpdu_len_exp" ] && \
+ vht_max_a_mpdu_len_exp_hw=2
+ [ "$(($vht_cap & 58720256))" -ge 25165824 -a 3 -le
"$vht_max_a_mpdu_len_exp" ] && \
+ vht_max_a_mpdu_len_exp_hw=3
+ [ "$(($vht_cap & 58720256))" -ge 33554432 -a 4 -le
"$vht_max_a_mpdu_len_exp" ] && \
+ vht_max_a_mpdu_len_exp_hw=4
+ [ "$(($vht_cap & 58720256))" -ge 41943040 -a 5 -le
"$vht_max_a_mpdu_len_exp" ] && \
+ vht_max_a_mpdu_len_exp_hw=5
+ [ "$(($vht_cap & 58720256))" -ge 50331648 -a 6 -le
"$vht_max_a_mpdu_len_exp" ] && \
+ vht_max_a_mpdu_len_exp_hw=6
+ [ "$(($vht_cap & 58720256))" -ge 58720256 -a 7 -le
"$vht_max_a_mpdu_len_exp" ] && \
+ vht_max_a_mpdu_len_exp_hw=7
+
vht_capab="$vht_capab[MAX-A-MPDU-LEN-EXP$vht_max_a_mpdu_len_exp_hw]"
# whether or not the STA supports link adaptation using VHT
variant
vht_link_adapt_hw=0
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