ath9k: Add debugfs files for printing TX rate details
Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath9k/core.h b/drivers/net/wireless/ath9k/core.h
index 8683fc8..791f1ac 100644
--- a/drivers/net/wireless/ath9k/core.h
+++ b/drivers/net/wireless/ath9k/core.h
@@ -131,8 +131,18 @@
u32 dtim;
};
+struct ath_legacy_rc_stats {
+ u32 success;
+};
+
+struct ath_11n_rc_stats {
+ u32 success;
+};
+
struct ath_stats {
struct ath_interrupt_stats istats;
+ struct ath_legacy_rc_stats legacy_rcstats[12]; /* max(11a,11b,11g) */
+ struct ath_11n_rc_stats n_rcstats[16]; /* 0..15 MCS rates */
};
struct ath9k_debug {
@@ -141,6 +151,7 @@
struct dentry *debugfs_phy;
struct dentry *debugfs_dma;
struct dentry *debugfs_interrupt;
+ struct dentry *debugfs_rcstat;
struct ath_stats stats;
};
@@ -148,6 +159,7 @@
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);
#else
@@ -170,6 +182,11 @@
{
}
+static inline void ath_debug_stat_rc(struct ath_softc *sc,
+ struct sk_buff *skb)
+{
+}
+
#endif /* CONFIG_ATH9K_DEBUG */
struct ath_config {
diff --git a/drivers/net/wireless/ath9k/debug.c b/drivers/net/wireless/ath9k/debug.c
index 1680164..6181e49 100644
--- a/drivers/net/wireless/ath9k/debug.c
+++ b/drivers/net/wireless/ath9k/debug.c
@@ -222,6 +222,98 @@
.owner = THIS_MODULE
};
+static void ath_debug_stat_11n_rc(struct ath_softc *sc, struct sk_buff *skb)
+{
+ struct ath_tx_info_priv *tx_info_priv = NULL;
+ struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
+ struct ieee80211_tx_rate *rates = tx_info->status.rates;
+ int final_ts_idx, idx;
+
+ tx_info_priv = ATH_TX_INFO_PRIV(tx_info);
+ final_ts_idx = tx_info_priv->tx.ts_rateindex;
+ idx = sc->cur_rate_table->info[rates[final_ts_idx].idx].dot11rate;
+
+ sc->sc_debug.stats.n_rcstats[idx].success++;
+}
+
+static void ath_debug_stat_legacy_rc(struct ath_softc *sc, struct sk_buff *skb)
+{
+ struct ath_tx_info_priv *tx_info_priv = NULL;
+ struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
+ struct ieee80211_tx_rate *rates = tx_info->status.rates;
+ int final_ts_idx, idx;
+
+ tx_info_priv = ATH_TX_INFO_PRIV(tx_info);
+ final_ts_idx = tx_info_priv->tx.ts_rateindex;
+ idx = rates[final_ts_idx].idx;
+
+ sc->sc_debug.stats.legacy_rcstats[idx].success++;
+}
+
+void ath_debug_stat_rc(struct ath_softc *sc, struct sk_buff *skb)
+{
+ if (conf_is_ht(&sc->hw->conf))
+ ath_debug_stat_11n_rc(sc, skb);
+ else
+ ath_debug_stat_legacy_rc(sc, skb);
+}
+
+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];
+ unsigned int len = 0;
+ int i = 0;
+
+ len += sprintf(buf, "%7s %13s\n\n", "Rate", "Success");
+
+ 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);
+ }
+
+ return simple_read_from_buffer(user_buf, count, ppos, buf, len);
+}
+
+static ssize_t ath_read_file_stat_legacy_rc(struct file *file,
+ char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ struct ath_softc *sc = file->private_data;
+ char buf[512];
+ unsigned int len = 0;
+ int i = 0;
+
+ len += sprintf(buf, "%7s %13s\n\n", "Rate", "Success");
+
+ for (i = 0; i < sc->cur_rate_table->rate_cnt; i++) {
+ len += snprintf(buf + len, sizeof(buf) - len, "%5u: %12u\n",
+ sc->cur_rate_table->info[i].ratekbps / 1000,
+ sc->sc_debug.stats.legacy_rcstats[i].success);
+ }
+
+ return simple_read_from_buffer(user_buf, count, ppos, buf, len);
+}
+
+static ssize_t read_file_rcstat(struct file *file, char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ struct ath_softc *sc = file->private_data;
+
+ if (conf_is_ht(&sc->hw->conf))
+ return ath_read_file_stat_11n_rc(file, user_buf, count, ppos);
+ else
+ return ath_read_file_stat_legacy_rc(file, user_buf, count ,ppos);
+}
+
+static const struct file_operations fops_rcstat = {
+ .read = read_file_rcstat,
+ .open = ath9k_debugfs_open,
+ .owner = THIS_MODULE
+};
int ath9k_init_debug(struct ath_softc *sc)
{
@@ -248,6 +340,13 @@
if (!sc->sc_debug.debugfs_interrupt)
goto err;
+ sc->sc_debug.debugfs_rcstat = debugfs_create_file("rcstat",
+ S_IRUGO,
+ sc->sc_debug.debugfs_phy,
+ sc, &fops_rcstat);
+ if (!sc->sc_debug.debugfs_rcstat)
+ goto err;
+
return 0;
err:
ath9k_exit_debug(sc);
@@ -256,6 +355,7 @@
void ath9k_exit_debug(struct ath_softc *sc)
{
+ debugfs_remove(sc->sc_debug.debugfs_rcstat);
debugfs_remove(sc->sc_debug.debugfs_interrupt);
debugfs_remove(sc->sc_debug.debugfs_dma);
debugfs_remove(sc->sc_debug.debugfs_phy);
diff --git a/drivers/net/wireless/ath9k/rc.c b/drivers/net/wireless/ath9k/rc.c
index a8c4f97..704b627 100644
--- a/drivers/net/wireless/ath9k/rc.c
+++ b/drivers/net/wireless/ath9k/rc.c
@@ -1544,6 +1544,8 @@
ieee80211_start_tx_ba_session(sc->hw, hdr->addr1, tid);
}
}
+
+ ath_debug_stat_rc(sc, skb);
exit:
kfree(tx_info_priv);
}