Create a new debugfs entry called 'rc_fixed_txpower_idx' in debugfs dir
for each station. By writing a positive static tx-power idx into this
file, minstrel_ht applies this tx-power idx to each packet or each mrr
stage, depending on what the hardware supports. By writing (u32)-1 to
the file, minstrel will return to automatic mode which currently just
passes -1 as tx-power idx, indicating that the driver should use a
default.
The debugfs entry will only be created if either tpc per packet or per
mrr is supported.
Signed-off-by: Jonas Jelonek <jelonek.jonas@xxxxxxxxx>
---
net/mac80211/rc80211_minstrel_ht.c | 14 ++++++++++++++
net/mac80211/rc80211_minstrel_ht.h | 11 +++++++++++
net/mac80211/rc80211_minstrel_ht_debugfs.c | 11 +++++++++++
3 files changed, 36 insertions(+)
diff --git a/net/mac80211/rc80211_minstrel_ht.c b/net/mac80211/rc80211_minstrel_ht.c
index 24c3c055db6d..222b51e7d9ee 100644
--- a/net/mac80211/rc80211_minstrel_ht.c
+++ b/net/mac80211/rc80211_minstrel_ht.c
@@ -1486,6 +1486,14 @@ minstrel_ht_set_rate(struct minstrel_priv *mp, struct minstrel_ht_sta *mi,
ratetbl->rate[offset].idx = idx;
ratetbl->rate[offset].flags = flags;
+
+#ifdef CONFIG_MAC80211_DEBUGFS
+ if (mi->fixed_txpower_idx != -1) {
+ ratetbl->rate[offset].txpower_idx = mi->fixed_txpower_idx;
+ return;
+ }
+#endif
+ ratetbl->rate[offset].txpower_idx = -1;
}
static inline int
@@ -1603,8 +1611,14 @@ minstrel_ht_get_rate(void *priv, struct ieee80211_sta *sta, void *priv_sta,
info->flags |= mi->tx_flags;
#ifdef CONFIG_MAC80211_DEBUGFS
+ if (mi->fixed_txpower_idx != -1)
+ info->control.txpower_idx = mi->fixed_txpower_idx;
+
if (mp->fixed_rate_idx != -1)
return;
+#else
+ /* Pass -1 to indicate 'ignore txpower' or 'use default' */
+ info->control.txpower_idx = -1;
#endif
/* Don't use EAPOL frames for sampling on non-mrr hw */
diff --git a/net/mac80211/rc80211_minstrel_ht.h b/net/mac80211/rc80211_minstrel_ht.h
index 1766ff0c78d3..15222d66c4b8 100644
--- a/net/mac80211/rc80211_minstrel_ht.h
+++ b/net/mac80211/rc80211_minstrel_ht.h
@@ -194,6 +194,17 @@ struct minstrel_ht_sta {
/* MCS rate group info and statistics */
struct minstrel_mcs_group_data groups[MINSTREL_GROUPS_NB];
+
+#ifdef CONFIG_MAC80211_DEBUGFS
+ /*
+ * enable fixed tx-power processing per STA
+ * - write static index to debugfs:ieee80211/phyX/netdev:wlanY
+ * /stations/<MAC>/rc_fixed_txpower_idx
+ * - write -1 to enable automatic processing again
+ * - setting will be applied on next update
+ */
+ u32 fixed_txpower_idx;
+#endif
};
void minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir);
diff --git a/net/mac80211/rc80211_minstrel_ht_debugfs.c b/net/mac80211/rc80211_minstrel_ht_debugfs.c
index 25b8a67a63a4..d625d860d01a 100644
--- a/net/mac80211/rc80211_minstrel_ht_debugfs.c
+++ b/net/mac80211/rc80211_minstrel_ht_debugfs.c
@@ -329,8 +329,19 @@ static const struct file_operations minstrel_ht_stat_csv_fops = {
void
minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir)
{
+ struct minstrel_priv *mp = priv;
+ struct minstrel_ht_sta *mi = priv_sta;
+
debugfs_create_file("rc_stats", 0444, dir, priv_sta,
&minstrel_ht_stat_fops);
debugfs_create_file("rc_stats_csv", 0444, dir, priv_sta,
&minstrel_ht_stat_csv_fops);
+
+ if (ieee80211_hw_check(mp->hw, SUPPORTS_TPC_PER_PACKET) ||
+ ieee80211_hw_check(mp->hw, SUPPORTS_TPC_PER_MRR))
+ {
+ mi->fixed_txpower_idx = (u32)-1;
+ debugfs_create_u32("rc_fixed_txpower_idx", S_IRUGO | S_IWUGO,
+ dir, &mi->fixed_txpower_idx);
+ }
}
--
2.30.2
