ath10k: add debugfs support for Per STA total rx duration

Add debugfs support for per client total rx duration, track this
via the report of Peer stats rx duration reported for every 500ms
Signed-off-by: Mohammed Shafi Shajakhan <mohammed@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

drivers/net/wireless/ath/ath10k/core.h

@@ -316,6 +316,7 @@ struct ath10k_sta {
 #ifdef CONFIG_MAC80211_DEBUGFS
 	/* protected by conf_mutex */
 	bool aggr_mode;
+	u64 rx_duration;
 #endif
 };
 

drivers/net/wireless/ath/ath10k/debug.c

@@ -319,7 +319,7 @@ static void ath10k_debug_fw_stats_reset(struct ath10k *ar)
 void ath10k_debug_fw_stats_process(struct ath10k *ar, struct sk_buff *skb)
 {
 	struct ath10k_fw_stats stats = {};
-	bool is_start, is_started, is_end;
+	bool is_start, is_started, is_end, peer_stats_svc;
 	size_t num_peers;
 	size_t num_vdevs;
 	int ret;
@@ -347,8 +347,8 @@ void ath10k_debug_fw_stats_process(struct ath10k *ar, struct sk_buff *skb)
 	 *     delivered which is treated as end-of-data and is itself discarded
 	 */
 
-	if (ar->debug.fw_stats_done &&
-	    !test_bit(WMI_SERVICE_PEER_STATS, ar->wmi.svc_map)) {
+	peer_stats_svc = test_bit(WMI_SERVICE_PEER_STATS, ar->wmi.svc_map);
+	if (ar->debug.fw_stats_done && !peer_stats_svc) {
 		ath10k_warn(ar, "received unsolicited stats update event\n");
 		goto free;
 	}
@@ -384,6 +384,9 @@ void ath10k_debug_fw_stats_process(struct ath10k *ar, struct sk_buff *skb)
 			goto free;
 		}
 
+		if (peer_stats_svc)
+			ath10k_sta_update_rx_duration(ar, &stats.peers);
+
 		list_splice_tail_init(&stats.peers, &ar->debug.fw_stats.peers);
 		list_splice_tail_init(&stats.vdevs, &ar->debug.fw_stats.vdevs);
 	}

drivers/net/wireless/ath/ath10k/debug.h

@@ -153,6 +153,12 @@ ath10k_debug_get_new_fw_crash_data(struct ath10k *ar)
 #ifdef CONFIG_MAC80211_DEBUGFS
 void ath10k_sta_add_debugfs(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 			    struct ieee80211_sta *sta, struct dentry *dir);
+void ath10k_sta_update_rx_duration(struct ath10k *ar, struct list_head *peer);
+#else
+static inline void ath10k_sta_update_rx_duration(struct ath10k *ar,
+						 struct list_head *peer)
+{
+}
 #endif /* CONFIG_MAC80211_DEBUGFS */
 
 #ifdef CONFIG_ATH10K_DEBUG

drivers/net/wireless/ath/ath10k/debugfs_sta.c

@@ -18,6 +18,23 @@
 #include "wmi-ops.h"
 #include "debug.h"
 
+void ath10k_sta_update_rx_duration(struct ath10k *ar, struct list_head *head)
+{	struct ieee80211_sta *sta;
+	struct ath10k_fw_stats_peer *peer;
+	struct ath10k_sta *arsta;
+
+	rcu_read_lock();
+	list_for_each_entry(peer, head, list) {
+		sta = ieee80211_find_sta_by_ifaddr(ar->hw, peer->peer_macaddr,
+						   NULL);
+		if (!sta)
+			continue;
+		arsta = (struct ath10k_sta *)sta->drv_priv;
+		arsta->rx_duration += (u64)peer->rx_duration;
+	}
+	rcu_read_unlock();
+}
+
 static ssize_t ath10k_dbg_sta_read_aggr_mode(struct file *file,
 					     char __user *user_buf,
 					     size_t count, loff_t *ppos)
@@ -232,6 +249,28 @@ static const struct file_operations fops_delba = {
 	.llseek = default_llseek,
 };
 
+static ssize_t ath10k_dbg_sta_read_rx_duration(struct file *file,
+					       char __user *user_buf,
+					       size_t count, loff_t *ppos)
+{
+	struct ieee80211_sta *sta = file->private_data;
+	struct ath10k_sta *arsta = (struct ath10k_sta *)sta->drv_priv;
+	char buf[100];
+	int len = 0;
+
+	len = scnprintf(buf, sizeof(buf),
+			"%llu usecs\n", arsta->rx_duration);
+
+	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
+}
+
+static const struct file_operations fops_rx_duration = {
+	.read = ath10k_dbg_sta_read_rx_duration,
+	.open = simple_open,
+	.owner = THIS_MODULE,
+	.llseek = default_llseek,
+};
+
 void ath10k_sta_add_debugfs(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 			    struct ieee80211_sta *sta, struct dentry *dir)
 {
@@ -240,4 +279,6 @@ void ath10k_sta_add_debugfs(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 	debugfs_create_file("addba", S_IWUSR, dir, sta, &fops_addba);
 	debugfs_create_file("addba_resp", S_IWUSR, dir, sta, &fops_addba_resp);
 	debugfs_create_file("delba", S_IWUSR, dir, sta, &fops_delba);
+	debugfs_create_file("rx_duration", S_IRUGO, dir, sta,
+			    &fops_rx_duration);
 }