rc80211-pid: export tuning parameters through debugfs

This adds all the tunable parameters used by rc80211_pid to debugfs for easy
testing and tuning.

Signed-off-by: Mattias Nissler <mattias.nissler@gmx.de>
Signed-off-by: Stefano Brivio <stefano.brivio@polimi.it>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 21 insertions, 2 deletions

diff --git a/net/mac80211/rc80211_pid.h b/net/mac80211/rc80211_pid.h
index 5d0056c1513b..425eb708182a 100644
--- a/net/mac80211/rc80211_pid.h
+++ b/net/mac80211/rc80211_pid.h
@@ -119,6 +119,20 @@ struct rc_pid_events_file_info {
         unsigned int next_entry;
 };
 
+struct rc_pid_debugfs_entries {
+        struct dentry *dir;
+        struct dentry *target;
+        struct dentry *sampling_period;
+        struct dentry *coeff_p;
+        struct dentry *coeff_i;
+        struct dentry *coeff_d;
+        struct dentry *smoothing_shift;
+        struct dentry *sharpen_factor;
+        struct dentry *sharpen_duration;
+        struct dentry *norm_offset;
+        struct dentry *fast_start;
+};
+
 void rate_control_pid_event_tx_status(struct rc_pid_event_buffer *buf,
                                              struct ieee80211_tx_status *stat);
 
@@ -222,8 +236,8 @@ struct rc_pid_info {
         /* Exponential averaging shift. */
         unsigned int smoothing_shift;
 
-        /* Sharpening shift and duration. */
-        unsigned int sharpen_shift;
+        /* Sharpening factor and duration. */
+        unsigned int sharpen_factor;
         unsigned int sharpen_duration;
 
         /* Normalization offset. */
@@ -237,6 +251,11 @@ struct rc_pid_info {
 
         /* Index of the last used rate. */
         int oldrate;
+
+#ifdef CONFIG_MAC80211_DEBUGFS
+        /* Debugfs entries created for the parameters above. */
+        struct rc_pid_debugfs_entries dentries;
+#endif
 };
 
 #endif /* RC80211_PID_H */