ath9k: make rate control debugfs stats per station

Move them to the same debugfs file that the other rc modules use.

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

1 files changed, 113 insertions, 2 deletions

diff --git a/drivers/net/wireless/ath/ath9k/rc.c b/drivers/net/wireless/ath/ath9k/rc.c
index abebf2466a13..5db3a12356ec 100644
--- a/drivers/net/wireless/ath/ath9k/rc.c
+++ b/drivers/net/wireless/ath/ath9k/rc.c
@@ -1026,6 +1026,16 @@ static bool ath_rc_update_per(struct ath_softc *sc,
         return state_change;
 }
 
+static void ath_debug_stat_retries(struct ath_rate_priv *rc, int rix,
+                                   int xretries, int retries, u8 per)
+{
+        struct ath_rc_stats *stats = &rc->rcstats[rix];
+
+        stats->xretries += xretries;
+        stats->retries += retries;
+        stats->per = per;
+}
+
 /* Update PER, RSSI and whatever else that the code thinks it is doing.
    If you can make sense of all this, you really need to go out more. */
 
@@ -1098,7 +1108,7 @@ 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,
+        ath_debug_stat_retries(ath_rc_priv, tx_rate, xretries, retries,
                                ath_rc_priv->per[tx_rate]);
 
 }
@@ -1294,6 +1304,7 @@ static void ath_rc_init(struct ath_softc *sc,
         ath_rc_sort_validrates(rate_table, ath_rc_priv);
         ath_rc_priv->rate_max_phy = ath_rc_priv->valid_rate_index[k-4];
         sc->cur_rate_table = rate_table;
+        ath_rc_priv->rate_table = rate_table;
 
         ath_print(common, ATH_DBG_CONFIG,
                   "RC Initialized with capabilities: 0x%x\n",
@@ -1340,6 +1351,15 @@ static bool ath_tx_aggr_check(struct ath_softc *sc, struct ath_node *an,
 /* mac80211 Rate Control callbacks */
 /***********************************/
 
+static void ath_debug_stat_rc(struct ath_rate_priv *rc, int final_rate)
+{
+        struct ath_rc_stats *stats;
+
+        stats = &rc->rcstats[final_rate];
+        stats->success++;
+}
+
+
 static void ath_tx_status(void *priv, struct ieee80211_supported_band *sband,
                           struct ieee80211_sta *sta, void *priv_sta,
                           struct sk_buff *skb)
@@ -1419,7 +1439,7 @@ static void ath_tx_status(void *priv, struct ieee80211_supported_band *sband,
                 }
         }
 
-        ath_debug_stat_rc(sc, ath_rc_get_rateindex(sc->cur_rate_table,
+        ath_debug_stat_rc(ath_rc_priv, ath_rc_get_rateindex(sc->cur_rate_table,
                 &tx_info->status.rates[final_ts_idx]));
 }
 
@@ -1521,6 +1541,94 @@ static void ath_rate_update(void *priv, struct ieee80211_supported_band *sband,
         }
 }
 
+#ifdef CONFIG_ATH9K_DEBUGFS
+
+static int ath9k_debugfs_open(struct inode *inode, struct file *file)
+{
+        file->private_data = inode->i_private;
+        return 0;
+}
+
+static ssize_t read_file_rcstat(struct file *file, char __user *user_buf,
+                                size_t count, loff_t *ppos)
+{
+        struct ath_rate_priv *rc = file->private_data;
+        char *buf;
+        unsigned int len = 0, max;
+        int i = 0;
+        ssize_t retval;
+
+        if (rc->rate_table == NULL)
+                return 0;
+
+        max = 80 + rc->rate_table->rate_cnt * 1024 + 1;
+        buf = kmalloc(max, GFP_KERNEL);
+        if (buf == NULL)
+                return -ENOMEM;
+
+        len += sprintf(buf, "%6s %6s %6s "
+                       "%10s %10s %10s %10s\n",
+                       "HT", "MCS", "Rate",
+                       "Success", "Retries", "XRetries", "PER");
+
+        for (i = 0; i < rc->rate_table->rate_cnt; i++) {
+                u32 ratekbps = rc->rate_table->info[i].ratekbps;
+                struct ath_rc_stats *stats = &rc->rcstats[i];
+                char mcs[5];
+                char htmode[5];
+                int used_mcs = 0, used_htmode = 0;
+
+                if (WLAN_RC_PHY_HT(rc->rate_table->info[i].phy)) {
+                        used_mcs = snprintf(mcs, 5, "%d",
+                                rc->rate_table->info[i].ratecode);
+
+                        if (WLAN_RC_PHY_40(rc->rate_table->info[i].phy))
+                                used_htmode = snprintf(htmode, 5, "HT40");
+                        else if (WLAN_RC_PHY_20(rc->rate_table->info[i].phy))
+                                used_htmode = snprintf(htmode, 5, "HT20");
+                        else
+                                used_htmode = snprintf(htmode, 5, "????");
+                }
+
+                mcs[used_mcs] = '\0';
+                htmode[used_htmode] = '\0';
+
+                len += snprintf(buf + len, max - len,
+                        "%6s %6s %3u.%d: "
+                        "%10u %10u %10u %10u\n",
+                        htmode,
+                        mcs,
+                        ratekbps / 1000,
+                        (ratekbps % 1000) / 100,
+                        stats->success,
+                        stats->retries,
+                        stats->xretries,
+                        stats->per);
+        }
+
+        if (len > max)
+                len = max;
+
+        retval = simple_read_from_buffer(user_buf, count, ppos, buf, len);
+        kfree(buf);
+        return retval;
+}
+
+static const struct file_operations fops_rcstat = {
+        .read = read_file_rcstat,
+        .open = ath9k_debugfs_open,
+        .owner = THIS_MODULE
+};
+
+static void ath_rate_add_sta_debugfs(void *priv, void *priv_sta,
+                                     struct dentry *dir)
+{
+        struct ath_rate_priv *rc = priv_sta;
+        debugfs_create_file("rc_stats", S_IRUGO, dir, rc, &fops_rcstat);
+}
+
+#endif /* CONFIG_ATH9K_DEBUGFS */
+
 static void *ath_rate_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir)
 {
         struct ath_wiphy *aphy = hw->priv;
@@ -1567,6 +1675,9 @@ static struct rate_control_ops ath_rate_ops = {
         .free = ath_rate_free,
         .alloc_sta = ath_rate_alloc_sta,
         .free_sta = ath_rate_free_sta,
+#ifdef CONFIG_ATH9K_DEBUGFS
+        .add_sta_debugfs = ath_rate_add_sta_debugfs,
+#endif
 };
 
 int ath_rate_control_register(void)