diff options
Diffstat (limited to 'package/kernel')
| -rw-r--r-- | package/kernel/mac80211/patches/subsys/383-mac80211-minstrel_ht-add-flag-to-indicate-missing-in.patch | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/subsys/383-mac80211-minstrel_ht-add-flag-to-indicate-missing-in.patch b/package/kernel/mac80211/patches/subsys/383-mac80211-minstrel_ht-add-flag-to-indicate-missing-in.patch new file mode 100644 index 0000000000..2c706b101f --- /dev/null +++ b/package/kernel/mac80211/patches/subsys/383-mac80211-minstrel_ht-add-flag-to-indicate-missing-in.patch @@ -0,0 +1,121 @@ +From: Felix Fietkau <nbd@nbd.name> +Date: Wed, 16 Jan 2019 21:47:54 +0100 +Subject: [PATCH] mac80211: minstrel_ht: add flag to indicate + missing/inaccurate tx A-MPDU length + +Some hardware (e.g. MediaTek MT7603) cannot report A-MPDU length in tx status +information. Add support for a flag to indicate that, to allow minstrel_ht +to use a fixed value in its internal calculation (which gives better results +than just defaulting to 1). + +Signed-off-by: Felix Fietkau <nbd@nbd.name> +--- + +--- a/include/net/mac80211.h ++++ b/include/net/mac80211.h +@@ -2132,6 +2132,9 @@ struct ieee80211_txq { + * @IEEE80211_HW_NEEDS_ALIGNED4_SKBS: Driver need aligned skbs to four-byte. + * Padding will be added after ieee80211_hdr, before IV/LLC. + * ++ * @IEEE80211_HW_TX_STATUS_NO_AMPDU_LEN: Driver does not report accurate A-MPDU ++ * length in tx status information ++ * + * @NUM_IEEE80211_HW_FLAGS: number of hardware flags, used for sizing arrays + */ + enum ieee80211_hw_flags { +@@ -2178,6 +2181,7 @@ enum ieee80211_hw_flags { + IEEE80211_HW_DEAUTH_NEED_MGD_TX_PREP, + IEEE80211_HW_DOESNT_SUPPORT_QOS_NDP, + IEEE80211_HW_NEEDS_ALIGNED4_SKBS, ++ IEEE80211_HW_TX_STATUS_NO_AMPDU_LEN, + + /* keep last, obviously */ + NUM_IEEE80211_HW_FLAGS +--- a/net/mac80211/debugfs.c ++++ b/net/mac80211/debugfs.c +@@ -215,6 +215,7 @@ static const char *hw_flag_names[] = { + FLAG(DEAUTH_NEED_MGD_TX_PREP), + FLAG(DOESNT_SUPPORT_QOS_NDP), + FLAG(NEEDS_ALIGNED4_SKBS), ++ FLAG(TX_STATUS_NO_AMPDU_LEN), + #undef FLAG + }; + +--- a/net/mac80211/rc80211_minstrel_ht.c ++++ b/net/mac80211/rc80211_minstrel_ht.c +@@ -294,6 +294,15 @@ minstrel_get_ratestats(struct minstrel_h + return &mi->groups[index / MCS_GROUP_RATES].rates[index % MCS_GROUP_RATES]; + } + ++static unsigned int ++minstrel_ht_avg_ampdu_len(struct minstrel_ht_sta *mi) ++{ ++ if (!mi->avg_ampdu_len) ++ return AVG_AMPDU_SIZE; ++ ++ return MINSTREL_TRUNC(mi->avg_ampdu_len); ++} ++ + /* + * Return current throughput based on the average A-MPDU length, taking into + * account the expected number of retransmissions and their expected length +@@ -309,7 +318,7 @@ minstrel_ht_get_tp_avg(struct minstrel_h + return 0; + + if (group != MINSTREL_CCK_GROUP) +- nsecs = 1000 * mi->overhead / MINSTREL_TRUNC(mi->avg_ampdu_len); ++ nsecs = 1000 * mi->overhead / minstrel_ht_avg_ampdu_len(mi); + + nsecs += minstrel_mcs_groups[group].duration[rate] << + minstrel_mcs_groups[group].shift; +@@ -503,8 +512,12 @@ minstrel_ht_update_stats(struct minstrel + u16 tmp_cck_tp_rate[MAX_THR_RATES], index; + + if (mi->ampdu_packets > 0) { +- mi->avg_ampdu_len = minstrel_ewma(mi->avg_ampdu_len, +- MINSTREL_FRAC(mi->ampdu_len, mi->ampdu_packets), EWMA_LEVEL); ++ if (!ieee80211_hw_check(mp->hw, TX_STATUS_NO_AMPDU_LEN)) ++ mi->avg_ampdu_len = minstrel_ewma(mi->avg_ampdu_len, ++ MINSTREL_FRAC(mi->ampdu_len, mi->ampdu_packets), ++ EWMA_LEVEL); ++ else ++ mi->avg_ampdu_len = 0; + mi->ampdu_len = 0; + mi->ampdu_packets = 0; + } +@@ -709,7 +722,9 @@ minstrel_ht_tx_status(void *priv, struct + mi->ampdu_len += info->status.ampdu_len; + + if (!mi->sample_wait && !mi->sample_tries && mi->sample_count > 0) { +- mi->sample_wait = 16 + 2 * MINSTREL_TRUNC(mi->avg_ampdu_len); ++ int avg_ampdu_len = minstrel_ht_avg_ampdu_len(mi); ++ ++ mi->sample_wait = 16 + 2 * avg_ampdu_len; + mi->sample_tries = 1; + mi->sample_count--; + } +@@ -777,7 +792,7 @@ minstrel_calc_retransmit(struct minstrel + unsigned int cw = mp->cw_min; + unsigned int ctime = 0; + unsigned int t_slot = 9; /* FIXME */ +- unsigned int ampdu_len = MINSTREL_TRUNC(mi->avg_ampdu_len); ++ unsigned int ampdu_len = minstrel_ht_avg_ampdu_len(mi); + unsigned int overhead = 0, overhead_rtscts = 0; + + mrs = minstrel_get_ratestats(mi, index); +--- a/net/mac80211/rc80211_minstrel_ht_debugfs.c ++++ b/net/mac80211/rc80211_minstrel_ht_debugfs.c +@@ -163,9 +163,10 @@ minstrel_ht_stats_open(struct inode *ino + "lookaround %d\n", + max(0, (int) mi->total_packets - (int) mi->sample_packets), + mi->sample_packets); +- p += sprintf(p, "Average # of aggregated frames per A-MPDU: %d.%d\n", +- MINSTREL_TRUNC(mi->avg_ampdu_len), +- MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10); ++ if (mi->avg_ampdu_len) ++ p += sprintf(p, "Average # of aggregated frames per A-MPDU: %d.%d\n", ++ MINSTREL_TRUNC(mi->avg_ampdu_len), ++ MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10); + ms->len = p - ms->buf; + WARN_ON(ms->len + sizeof(*ms) > 32768); + |