mac80211: add PID controller based rate control algorithm

Add a new rate control algorithm based on a PID controller. It samples the
percentage of failed frames over time, feeds the result into the controller and
uses its output to control the TX rate.

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

1 files changed, 12 insertions, 0 deletions

diff --git a/net/mac80211/Kconfig b/net/mac80211/Kconfig
index 09711b062807..9f8663b412d9 100644
--- a/net/mac80211/Kconfig
+++ b/net/mac80211/Kconfig
@@ -25,6 +25,18 @@ config MAC80211_RCSIMPLE
           Say Y unless you know you will have another algorithm
           available.
 
+config MAC80211_RCPID
+        bool "'PID' rate control algorithm" if EMBEDDED
+        default y
+        depends on MAC80211
+        help
+          This option enables a TX rate control algorithm for
+          mac80211 that uses a PID controller to select the TX
+          rate.
+
+          Say Y unless you're sure you want to use a different
+          rate control algorithm.
+
 config MAC80211_LEDS
         bool "Enable LED triggers"
         depends on MAC80211 && LEDS_TRIGGERS