ath10k: enable debugfs provision to enable Peer Stats feature

Provide a debugfs entry to enable/ disable Peer Stats feature.
Peer Stats feature is for developers/users who are more interested
in studying in Rx/Tx stats with multiple clients connected, hence
disable this by default. Enabling this feature by default results
in unneccessary processing of Peer Stats event for every 500ms
and updating peer_stats list (allocating memory) and cleaning it up
ifexceeds the higher limit and this can be an unnecessary overhead
during long run stress testing.

Signed-off-by: Mohammed Shafi Shajakhan <mohammed@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

1 files changed, 75 insertions, 5 deletions

diff --git a/drivers/net/wireless/ath/ath10k/debug.c b/drivers/net/wireless/ath/ath10k/debug.c
index dec7e054b4b6..76bbe17b25b6 100644
--- a/drivers/net/wireless/ath/ath10k/debug.c
+++ b/drivers/net/wireless/ath/ath10k/debug.c
@@ -323,7 +323,7 @@ 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, peer_stats_svc;
+	bool is_start, is_started, is_end;
 	size_t num_peers;
 	size_t num_vdevs;
 	int ret;
@@ -350,13 +350,11 @@ void ath10k_debug_fw_stats_process(struct ath10k *ar, struct sk_buff *skb)
 	 *  b) consume stat update events until another one with pdev stats is
 	 *     delivered which is treated as end-of-data and is itself discarded
 	 */
-
-	peer_stats_svc = test_bit(WMI_SERVICE_PEER_STATS, ar->wmi.svc_map);
-	if (peer_stats_svc)
+	if (ath10k_peer_stats_enabled(ar))
 		ath10k_sta_update_rx_duration(ar, &stats.peers);
 
 	if (ar->debug.fw_stats_done) {
-		if (!peer_stats_svc)
+		if (!ath10k_peer_stats_enabled(ar))
 			ath10k_warn(ar, "received unsolicited stats update event\n");
 
 		goto free;
@@ -2184,6 +2182,73 @@ static const struct file_operations fops_btcoex = {
 	.open = simple_open
 };
 
+static ssize_t ath10k_write_peer_stats(struct file *file,
+				       const char __user *ubuf,
+				       size_t count, loff_t *ppos)
+{
+	struct ath10k *ar = file->private_data;
+	char buf[32];
+	size_t buf_size;
+	int ret = 0;
+	bool val;
+
+	buf_size = min(count, (sizeof(buf) - 1));
+	if (copy_from_user(buf, ubuf, buf_size))
+		return -EFAULT;
+
+	buf[buf_size] = '\0';
+
+	if (strtobool(buf, &val) != 0)
+		return -EINVAL;
+
+	mutex_lock(&ar->conf_mutex);
+
+	if (ar->state != ATH10K_STATE_ON &&
+	    ar->state != ATH10K_STATE_RESTARTED) {
+		ret = -ENETDOWN;
+		goto exit;
+	}
+
+	if (!(test_bit(ATH10K_FLAG_PEER_STATS, &ar->dev_flags) ^ val))
+		goto exit;
+
+	if (val)
+		set_bit(ATH10K_FLAG_PEER_STATS, &ar->dev_flags);
+	else
+		clear_bit(ATH10K_FLAG_PEER_STATS, &ar->dev_flags);
+
+	ath10k_info(ar, "restarting firmware due to Peer stats change");
+
+	queue_work(ar->workqueue, &ar->restart_work);
+	ret = count;
+
+exit:
+	mutex_unlock(&ar->conf_mutex);
+	return ret;
+}
+
+static ssize_t ath10k_read_peer_stats(struct file *file, char __user *ubuf,
+				      size_t count, loff_t *ppos)
+
+{
+	char buf[32];
+	struct ath10k *ar = file->private_data;
+	int len = 0;
+
+	mutex_lock(&ar->conf_mutex);
+	len = scnprintf(buf, sizeof(buf) - len, "%d\n",
+			test_bit(ATH10K_FLAG_PEER_STATS, &ar->dev_flags));
+	mutex_unlock(&ar->conf_mutex);
+
+	return simple_read_from_buffer(ubuf, count, ppos, buf, len);
+}
+
+static const struct file_operations fops_peer_stats = {
+	.read = ath10k_read_peer_stats,
+	.write = ath10k_write_peer_stats,
+	.open = simple_open
+};
+
 static ssize_t ath10k_debug_fw_checksums_read(struct file *file,
 					      char __user *user_buf,
 					      size_t count, loff_t *ppos)
@@ -2347,6 +2412,11 @@ int ath10k_debug_register(struct ath10k *ar)
 		debugfs_create_file("btcoex", S_IRUGO | S_IWUSR,
 				    ar->debug.debugfs_phy, ar, &fops_btcoex);
 
+	if (test_bit(WMI_SERVICE_PEER_STATS, ar->wmi.svc_map))
+		debugfs_create_file("peer_stats", S_IRUGO | S_IWUSR,
+				    ar->debug.debugfs_phy, ar,
+				    &fops_peer_stats);
+
 	debugfs_create_file("fw_checksums", S_IRUSR,
 			    ar->debug.debugfs_phy, ar, &fops_fw_checksums);