git.openwrt.org Git - openwrt/openwrt.git/blob

   1 From: Felix Fietkau <nbd@nbd.name>
   2 Date: Wed, 6 Aug 2025 10:52:03 +0200
   3 Subject: [PATCH] mac80211: estimate expected throughput if not provided by
   4  driver/rc
   5
   6 Estimate the tx throughput based on the expected per-packet tx time.
   7 This is useful for mesh implementations that rely on expected throughput,
   8 e.g. 802.11s or batman-adv.
   9
  10 Signed-off-by: Felix Fietkau <nbd@nbd.name>
  11 ---
  12
  13 --- a/net/mac80211/sta_info.c
  14 +++ b/net/mac80211/sta_info.c
  15 @@ -2621,6 +2621,29 @@ static inline u64 sta_get_stats_bytes(st
  16         return value;
  17  }
  18
  19 +static u32 sta_estimate_expected_throughput(struct sta_info *sta,
  20 +                                           struct station_info *sinfo)
  21 +{
  22 +       struct ieee80211_sub_if_data *sdata = sta->sdata;
  23 +       struct ieee80211_local *local = sdata->local;
  24 +       struct rate_info *ri = &sinfo->txrate;
  25 +       struct ieee80211_hw *hw = &local->hw;
  26 +       struct ieee80211_chanctx_conf *conf;
  27 +       u32 duration;
  28 +       u8 band = 0;
  29 +
  30 +       conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
  31 +       if (conf)
  32 +                       band = conf->def.chan->band;
  33 +
  34 +       duration = ieee80211_rate_expected_tx_airtime(hw, NULL, ri, band, true, 1024);
  35 +       duration += duration >> 4; /* add assumed packet error rate of ~6% */
  36 +       if (!duration)
  37 +               return 0;
  38 +
  39 +       return ((1024 * USEC_PER_SEC) / duration) * 8;
  40 +}
  41 +
  42  void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo,
  43                    bool tidstats)
  44  {
  45 @@ -2865,6 +2888,8 @@ void sta_set_sinfo(struct sta_info *sta,
  46                 sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_TDLS_PEER);
  47
  48         thr = sta_get_expected_throughput(sta);
  49 +       if (!thr && (sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_BITRATE)))
  50 +           thr = sta_estimate_expected_throughput(sta, sinfo);
  51
  52         if (thr != 0) {
  53                 sinfo->filled |= BIT_ULL(NL80211_STA_INFO_EXPECTED_THROUGHPUT);