diff options
| author | Felix Fietkau <nbd@nbd.name> | 2021-01-15 15:02:38 +0300 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2021-01-22 11:11:37 +0300 |
| commit | 1ae8bba9a23b6cc9efbd9b4ca485ed057d5639a6 (patch) | |
| tree | 1544c812a501ad793ea9744953763ec3d1af4c9f /net/mac80211 | |
| parent | eeafcb0c80c81d6f569fc72630f573ea56112f2b (diff) | |
| download | linux-1ae8bba9a23b6cc9efbd9b4ca485ed057d5639a6.tar.xz | |
mac80211: minstrel_ht: improve ampdu length estimation
If the driver does not report A-MPDU length, estimate it based on the rate.
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Link: https://lore.kernel.org/r/20210115120242.89616-6-nbd@nbd.name
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211')
| -rw-r--r-- | net/mac80211/rc80211_minstrel_ht.c | 38 |
1 files changed, 27 insertions, 11 deletions
diff --git a/net/mac80211/rc80211_minstrel_ht.c b/net/mac80211/rc80211_minstrel_ht.c index 9280461ed3cc..8b2376898ec8 100644 --- a/net/mac80211/rc80211_minstrel_ht.c +++ b/net/mac80211/rc80211_minstrel_ht.c @@ -382,13 +382,37 @@ minstrel_get_ratestats(struct minstrel_ht_sta *mi, int index) return &mi->groups[index / MCS_GROUP_RATES].rates[index % MCS_GROUP_RATES]; } +static inline int minstrel_get_duration(int index) +{ + const struct mcs_group *group = &minstrel_mcs_groups[index / MCS_GROUP_RATES]; + unsigned int duration = group->duration[index % MCS_GROUP_RATES]; + + return duration << group->shift; +} + static unsigned int minstrel_ht_avg_ampdu_len(struct minstrel_ht_sta *mi) { - if (!mi->avg_ampdu_len) - return AVG_AMPDU_SIZE; + int duration; + + if (mi->avg_ampdu_len) + return MINSTREL_TRUNC(mi->avg_ampdu_len); + + if (minstrel_ht_is_legacy_group(mi->max_tp_rate[0] / MCS_GROUP_RATES)) + return 1; + + duration = minstrel_get_duration(mi->max_tp_rate[0]); - return MINSTREL_TRUNC(mi->avg_ampdu_len); + if (duration > 400 * 1000) + return 2; + + if (duration > 250 * 1000) + return 4; + + if (duration > 150 * 1000) + return 8; + + return 16; } /* @@ -588,14 +612,6 @@ minstrel_ht_prob_rate_reduce_streams(struct minstrel_ht_sta *mi) } } -static inline int -minstrel_get_duration(int index) -{ - const struct mcs_group *group = &minstrel_mcs_groups[index / MCS_GROUP_RATES]; - unsigned int duration = group->duration[index % MCS_GROUP_RATES]; - return duration << group->shift; -} - static bool minstrel_ht_probe_group(struct minstrel_ht_sta *mi, const struct mcs_group *tp_group, int tp_idx, const struct mcs_group *group) |