mac80211: query driver for max A-MPDU length exponent
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
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1 changed files with 20 additions and 1 deletions
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@ -36,7 +36,7 @@ drv_mac80211_init_device_config() {
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htc_vht \
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rx_antenna_pattern \
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tx_antenna_pattern
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config_add_int vht_max_mpdu vht_link_adapt vht160 rx_stbc tx_stbc
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config_add_int vht_max_a_mpdu_len_exp vht_max_mpdu vht_link_adapt vht160 rx_stbc tx_stbc
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}
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drv_mac80211_init_iface_config() {
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@ -202,6 +202,7 @@ mac80211_hostapd_setup_base() {
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htc_vht:1 \
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rx_antenna_pattern:1 \
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tx_antenna_pattern:1 \
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vht_max_a_mpdu_len_exp:7 \
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vht_max_mpdu:11454 \
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rx_stbc:4 \
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tx_stbc:4 \
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@ -253,6 +254,24 @@ mac80211_hostapd_setup_base() {
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vht_max_mpdu_hw=11454
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[ "$vht_max_mpdu_hw" != 3895 ] && \
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vht_capab="$vht_capab[MAX-MPDU-$vht_max_mpdu_hw]"
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# maximum A-MPDU length exponent
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vht_max_a_mpdu_len_exp_hw=0
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[ "$(($vht_cap & 58720256))" -ge 8388608 -a 1 -le "$vht_max_a_mpdu_len_exp" ] && \
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vht_max_a_mpdu_len_exp_hw=1
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[ "$(($vht_cap & 58720256))" -ge 16777216 -a 2 -le "$vht_max_a_mpdu_len_exp" ] && \
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vht_max_a_mpdu_len_exp_hw=2
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[ "$(($vht_cap & 58720256))" -ge 25165824 -a 3 -le "$vht_max_a_mpdu_len_exp" ] && \
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vht_max_a_mpdu_len_exp_hw=3
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[ "$(($vht_cap & 58720256))" -ge 33554432 -a 4 -le "$vht_max_a_mpdu_len_exp" ] && \
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vht_max_a_mpdu_len_exp_hw=4
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[ "$(($vht_cap & 58720256))" -ge 41943040 -a 5 -le "$vht_max_a_mpdu_len_exp" ] && \
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vht_max_a_mpdu_len_exp_hw=5
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[ "$(($vht_cap & 58720256))" -ge 50331648 -a 6 -le "$vht_max_a_mpdu_len_exp" ] && \
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vht_max_a_mpdu_len_exp_hw=6
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[ "$(($vht_cap & 58720256))" -ge 58720256 -a 7 -le "$vht_max_a_mpdu_len_exp" ] && \
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vht_max_a_mpdu_len_exp_hw=7
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vht_capab="$vht_capab[MAX-A-MPDU-LEN-EXP$vht_max_a_mpdu_len_exp_hw]"
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# whether or not the STA supports link adaptation using VHT variant
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vht_link_adapt_hw=0
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