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mac80211: query driver for max A-MPDU length exponent

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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>

SVN-Revision: 40938
This commit is contained in:
John Crispin 2014-06-02 12:44:54 +00:00
parent 40218343cd
commit 43de2d08de
1 changed files with 20 additions and 1 deletions
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21
package/kernel/mac80211/files/lib/netifd/wireless/mac80211.sh
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@ -36,7 +36,7 @@ drv_mac80211_init_device_config() {
htc_vht \
rx_antenna_pattern \
tx_antenna_pattern
config_add_int vht_max_mpdu vht_link_adapt vht160 rx_stbc tx_stbc
config_add_int vht_max_a_mpdu_len_exp vht_max_mpdu vht_link_adapt vht160 rx_stbc tx_stbc
}
drv_mac80211_init_iface_config() {
@ -202,6 +202,7 @@ 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 \
tx_stbc:4 \
@ -254,6 +255,24 @@ mac80211_hostapd_setup_base() {
[ "$vht_max_mpdu_hw" != 3895 ] && \
vht_capab="$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
[ "$(($vht_cap & 201326592))" -ge 134217728 -a 2 -le "$vht_link_adapt" ] && \