1 files changed, 85 insertions, 0 deletions

diff --git a/net/mac80211/debugfs.c b/net/mac80211/debugfs.c
index 5c52429038c3..ad41d74530c6 100644
--- a/net/mac80211/debugfs.c
+++ b/net/mac80211/debugfs.c
@@ -150,6 +150,87 @@ static const struct file_operations aqm_ops = {
 	.llseek = default_llseek,
 };
 
+static ssize_t aql_txq_limit_read(struct file *file,
+				  char __user *user_buf,
+				  size_t count,
+				  loff_t *ppos)
+{
+	struct ieee80211_local *local = file->private_data;
+	char buf[400];
+	int len = 0;
+
+	len = scnprintf(buf, sizeof(buf),
+			"AC	AQL limit low	AQL limit high\n"
+			"VO	%u		%u\n"
+			"VI	%u		%u\n"
+			"BE	%u		%u\n"
+			"BK	%u		%u\n",
+			local->aql_txq_limit_low[IEEE80211_AC_VO],
+			local->aql_txq_limit_high[IEEE80211_AC_VO],
+			local->aql_txq_limit_low[IEEE80211_AC_VI],
+			local->aql_txq_limit_high[IEEE80211_AC_VI],
+			local->aql_txq_limit_low[IEEE80211_AC_BE],
+			local->aql_txq_limit_high[IEEE80211_AC_BE],
+			local->aql_txq_limit_low[IEEE80211_AC_BK],
+			local->aql_txq_limit_high[IEEE80211_AC_BK]);
+	return simple_read_from_buffer(user_buf, count, ppos,
+				       buf, len);
+}
+
+static ssize_t aql_txq_limit_write(struct file *file,
+				   const char __user *user_buf,
+				   size_t count,
+				   loff_t *ppos)
+{
+	struct ieee80211_local *local = file->private_data;
+	char buf[100];
+	size_t len;
+	u32 ac, q_limit_low, q_limit_high, q_limit_low_old, q_limit_high_old;
+	struct sta_info *sta;
+
+	if (count > sizeof(buf))
+		return -EINVAL;
+
+	if (copy_from_user(buf, user_buf, count))
+		return -EFAULT;
+
+	buf[sizeof(buf) - 1] = 0;
+	len = strlen(buf);
+	if (len > 0 && buf[len - 1] == '\n')
+		buf[len - 1] = 0;
+
+	if (sscanf(buf, "%u %u %u", &ac, &q_limit_low, &q_limit_high) != 3)
+		return -EINVAL;
+
+	if (ac >= IEEE80211_NUM_ACS)
+		return -EINVAL;
+
+	q_limit_low_old = local->aql_txq_limit_low[ac];
+	q_limit_high_old = local->aql_txq_limit_high[ac];
+
+	local->aql_txq_limit_low[ac] = q_limit_low;
+	local->aql_txq_limit_high[ac] = q_limit_high;
+
+	mutex_lock(&local->sta_mtx);
+	list_for_each_entry(sta, &local->sta_list, list) {
+		/* If a sta has customized queue limits, keep it */
+		if (sta->airtime[ac].aql_limit_low == q_limit_low_old &&
+		    sta->airtime[ac].aql_limit_high == q_limit_high_old) {
+			sta->airtime[ac].aql_limit_low = q_limit_low;
+			sta->airtime[ac].aql_limit_high = q_limit_high;
+		}
+	}
+	mutex_unlock(&local->sta_mtx);
+	return count;
+}
+
+static const struct file_operations aql_txq_limit_ops = {
+	.write = aql_txq_limit_write,
+	.read = aql_txq_limit_read,
+	.open = simple_open,
+	.llseek = default_llseek,
+};
+
 static ssize_t force_tx_status_read(struct file *file,
 				    char __user *user_buf,
 				    size_t count,
@@ -444,6 +525,10 @@ void debugfs_hw_add(struct ieee80211_local *local)
 	debugfs_create_u16("airtime_flags", 0600,
 			   phyd, &local->airtime_flags);
 
+	DEBUGFS_ADD(aql_txq_limit);
+	debugfs_create_u32("aql_threshold", 0600,
+			   phyd, &local->aql_threshold);
+
 	statsd = debugfs_create_dir("statistics", phyd);
 
 	/* if the dir failed, don't put all the other things into the root! */