Estimate the tx throughput based on the expected per-packet tx time.
This is useful for mesh implementations that rely on expected throughput,
e.g. 802.11s or batman-adv.
Signed-off-by: Felix Fietkau <nbd@xxxxxxxx>
---
net/mac80211/sta_info.c | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c
index 8c550aab9bdc..3d2134abf23c 100644
--- a/net/mac80211/sta_info.c
+++ b/net/mac80211/sta_info.c
@@ -2956,6 +2956,27 @@ static void sta_set_link_sinfo(struct sta_info *sta,
}
}
+static u32 sta_estimate_expected_throughput(struct sta_info *sta,
+ struct station_info *sinfo)
+{
+ struct ieee80211_sub_if_data *sdata = sta->sdata;
+ struct ieee80211_local *local = sdata->local;
+ struct rate_info *ri = &sinfo->txrate;
+ struct ieee80211_hw *hw = &local->hw;
+ struct ieee80211_chanctx_conf *conf;
+ u32 duration;
+ u8 band = 0;
+
+ conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
+ if (conf)
+ band = conf->def.chan->band;
+
+ duration = ieee80211_rate_expected_tx_airtime(hw, NULL, ri, band, true, 1024);
+ duration += duration >> 4; /* add assumed packet error rate of ~6% */
+
+ return ((1024 * USEC_PER_SEC) / duration) * 8;
+}
+
void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo,
bool tidstats)
{
@@ -3180,6 +3201,8 @@ void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo,
sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_TDLS_PEER);
thr = sta_get_expected_throughput(sta);
+ if (!thr && (sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_BITRATE)))
+ thr = sta_estimate_expected_throughput(sta, sinfo);
if (thr != 0) {
sinfo->filled |= BIT_ULL(NL80211_STA_INFO_EXPECTED_THROUGHPUT);
--
2.51.0
