mac80211: add the 'minstrel' rate control algorithm

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

Author: Felix Fietkau

net/mac80211/Kconfig

@@ -22,6 +22,11 @@ config MAC80211_RC_PID
 	  mac80211 that uses a PID controller to select the TX
 	  rate.
 
+config MAC80211_RC_MINSTREL
+	bool "Minstrel"
+	---help---
+	  This option enables the 'minstrel' TX rate control algorithm
+
 choice
 	prompt "Default rate control algorithm"
 	default MAC80211_RC_DEFAULT_PID
@@ -39,11 +44,19 @@ config MAC80211_RC_DEFAULT_PID
 	  default rate control algorithm. You should choose
 	  this unless you know what you are doing.
 
+config MAC80211_RC_DEFAULT_MINSTREL
+	bool "Minstrel"
+	depends on MAC80211_RC_MINSTREL
+	---help---
+	  Select Minstrel as the default rate control algorithm.
+
+
 endchoice
 
 config MAC80211_RC_DEFAULT
 	string
 	default "pid" if MAC80211_RC_DEFAULT_PID
+	default "minstrel" if MAC80211_RC_DEFAULT_MINSTREL
 	default ""
 
 endmenu

net/mac80211/Makefile

@@ -41,4 +41,8 @@ mac80211-$(CONFIG_MAC80211_MESH) += \
 rc80211_pid-y := rc80211_pid_algo.o
 rc80211_pid-$(CONFIG_MAC80211_DEBUGFS) += rc80211_pid_debugfs.o
 
+rc80211_minstrel-y := rc80211_minstrel.o
+rc80211_minstrel-$(CONFIG_MAC80211_DEBUGFS) += rc80211_minstrel_debugfs.o
+
 mac80211-$(CONFIG_MAC80211_RC_PID) += $(rc80211_pid-y)
+mac80211-$(CONFIG_MAC80211_RC_MINSTREL) += $(rc80211_minstrel-y)

net/mac80211/main.c

@@ -1015,6 +1015,10 @@ static int __init ieee80211_init(void)
 	BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) +
 	             IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb));
 
+	ret = rc80211_minstrel_init();
+	if (ret)
+		return ret;
+
 	ret = rc80211_pid_init();
 	if (ret)
 		return ret;
@@ -1027,6 +1031,7 @@ static int __init ieee80211_init(void)
 static void __exit ieee80211_exit(void)
 {
 	rc80211_pid_exit();
+	rc80211_minstrel_exit();
 
 	/*
 	 * For key todo, it'll be empty by now but the work

net/mac80211/rate.h

@@ -125,4 +125,18 @@ static inline void rc80211_pid_exit(void)
 }
 #endif
 
+#ifdef CONFIG_MAC80211_RC_MINSTREL
+extern int rc80211_minstrel_init(void);
+extern void rc80211_minstrel_exit(void);
+#else
+static inline int rc80211_minstrel_init(void)
+{
+	return 0;
+}
+static inline void rc80211_minstrel_exit(void)
+{
+}
+#endif
+
+
 #endif /* IEEE80211_RATE_H */