ath9k: Add retry counters to rate control debug file

Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

3 files changed, 30 insertions, 4 deletions

diff --git a/drivers/net/wireless/ath9k/core.h b/drivers/net/wireless/ath9k/core.h
index 63d3eb6cda88..64fc5c269f22 100644
--- a/drivers/net/wireless/ath9k/core.h
+++ b/drivers/net/wireless/ath9k/core.h
@@ -137,6 +137,8 @@ struct ath_legacy_rc_stats {
 
 struct ath_11n_rc_stats {
         u32 success;
+        u32 retries;
+        u32 xretries;
 };
 
 struct ath_stats {
@@ -160,6 +162,8 @@ int ath9k_init_debug(struct ath_softc *sc);
 void ath9k_exit_debug(struct ath_softc *sc);
 void ath_debug_stat_interrupt(struct ath_softc *sc, enum ath9k_int status);
 void ath_debug_stat_rc(struct ath_softc *sc, struct sk_buff *skb);
+void ath_debug_stat_retries(struct ath_softc *sc, int rix,
+                            int xretries, int retries);
 
 #else
 
@@ -187,6 +191,11 @@ static inline void ath_debug_stat_rc(struct ath_softc *sc,
 {
 }
 
+static inline void ath_debug_stat_retries(struct ath_softc *sc, int rix,
+                                          int xretries, int retries)
+{
+}
+
 #endif /* CONFIG_ATH9K_DEBUG */
 
 struct ath_config {
diff --git a/drivers/net/wireless/ath9k/debug.c b/drivers/net/wireless/ath9k/debug.c
index 6181e49eecba..2de1b8a57b94 100644
--- a/drivers/net/wireless/ath9k/debug.c
+++ b/drivers/net/wireless/ath9k/debug.c
@@ -258,21 +258,36 @@ void ath_debug_stat_rc(struct ath_softc *sc, struct sk_buff *skb)
                 ath_debug_stat_legacy_rc(sc, skb);
 }
 
+/* FIXME: legacy rates, later on .. */
+void ath_debug_stat_retries(struct ath_softc *sc, int rix,
+                            int xretries, int retries)
+{
+        if (conf_is_ht(&sc->hw->conf)) {
+                int idx = sc->cur_rate_table->info[rix].dot11rate;
+
+                sc->sc_debug.stats.n_rcstats[idx].xretries += xretries;
+                sc->sc_debug.stats.n_rcstats[idx].retries += retries;
+        }
+}
+
 static ssize_t ath_read_file_stat_11n_rc(struct file *file,
                                          char __user *user_buf,
                                          size_t count, loff_t *ppos)
 {
         struct ath_softc *sc = file->private_data;
-        char buf[512];
+        char buf[1024];
         unsigned int len = 0;
         int i = 0;
 
-        len += sprintf(buf, "%7s %13s\n\n", "Rate", "Success");
+        len += sprintf(buf, "%7s %13s %8s %8s\n\n", "Rate", "Success",
+                       "Retries", "XRetries");
 
         for (i = 0; i <= 15; i++) {
                 len += snprintf(buf + len, sizeof(buf) - len,
-                                "%5s%3d: %8u\n", "MCS", i,
-                                sc->sc_debug.stats.n_rcstats[i].success);
+                                "%5s%3d: %8u %8u %8u\n", "MCS", i,
+                                sc->sc_debug.stats.n_rcstats[i].success,
+                                sc->sc_debug.stats.n_rcstats[i].retries,
+                                sc->sc_debug.stats.n_rcstats[i].xretries);
         }
 
         return simple_read_from_buffer(user_buf, count, ppos, buf, len);
diff --git a/drivers/net/wireless/ath9k/rc.c b/drivers/net/wireless/ath9k/rc.c
index 704b62778142..69a4ca46ce90 100644
--- a/drivers/net/wireless/ath9k/rc.c
+++ b/drivers/net/wireless/ath9k/rc.c
@@ -1267,6 +1267,8 @@ static void ath_rc_update_ht(struct ath_softc *sc,
                 ath_rc_priv->per_down_time = now_msec;
         }
 
+        ath_debug_stat_retries(sc, tx_rate, xretries, retries);
+
 #undef CHK_RSSI
 }