minstrel_ht: fixed rate mode through debugfs
Found several threads about fixed rate mode in minstrel_ht for test
environments, but no patches for it.
This patch provides such a mode through debugfs.
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/rc80211_minstrel.c b/net/mac80211/rc80211_minstrel.c
index 8adac67..58a8955 100644
--- a/net/mac80211/rc80211_minstrel.c
+++ b/net/mac80211/rc80211_minstrel.c
@@ -532,12 +532,21 @@
mp->hw = hw;
mp->update_interval = 100;
+#ifdef CONFIG_MAC80211_DEBUGFS
+ mp->fixed_rate_idx = (u32) -1;
+ mp->dbg_fixed_rate = debugfs_create_u32("fixed_rate_idx",
+ S_IRUGO | S_IWUGO, debugfsdir, &mp->fixed_rate_idx);
+#endif
+
return mp;
}
static void
minstrel_free(void *priv)
{
+#ifdef CONFIG_MAC80211_DEBUGFS
+ debugfs_remove(((struct minstrel_priv *)priv)->dbg_fixed_rate);
+#endif
kfree(priv);
}
diff --git a/net/mac80211/rc80211_minstrel.h b/net/mac80211/rc80211_minstrel.h
index 0f5a833..5d278ec 100644
--- a/net/mac80211/rc80211_minstrel.h
+++ b/net/mac80211/rc80211_minstrel.h
@@ -78,6 +78,18 @@
unsigned int update_interval;
unsigned int lookaround_rate;
unsigned int lookaround_rate_mrr;
+
+#ifdef CONFIG_MAC80211_DEBUGFS
+ /*
+ * enable fixed rate processing per RC
+ * - write static index to debugfs:ieee80211/phyX/rc/fixed_rate_idx
+ * - write -1 to enable RC processing again
+ * - setting will be applied on next update
+ */
+ u32 fixed_rate_idx;
+ struct dentry *dbg_fixed_rate;
+#endif
+
};
struct minstrel_debugfs_info {
diff --git a/net/mac80211/rc80211_minstrel_ht.c b/net/mac80211/rc80211_minstrel_ht.c
index 333b511..66a1eeb 100644
--- a/net/mac80211/rc80211_minstrel_ht.c
+++ b/net/mac80211/rc80211_minstrel_ht.c
@@ -609,6 +609,13 @@
info->flags |= mi->tx_flags;
sample_idx = minstrel_get_sample_rate(mp, mi);
+
+#ifdef CONFIG_MAC80211_DEBUGFS
+ /* use fixed index if set */
+ if (mp->fixed_rate_idx != -1)
+ sample_idx = mp->fixed_rate_idx;
+#endif
+
if (sample_idx >= 0) {
sample = true;
minstrel_ht_set_rate(mp, mi, &ar[0], sample_idx,