ath10k: add support to send delba

This per-station debugfs entry helps to send delba in manual mode
for debugging purpose. It accepts tid, initiator and reason code
as inputs.

To send delba,

echo 0 1 37 >/sys/kernel/debug/ieee80211/phyX/netdev:wlanX/
	     stations/XX:XX:XX:XX:XX:XX/delba

Signed-off-by: Rajkumar Manoharan <rmanohar@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

1 files changed, 52 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath10k/debugfs_sta.c b/drivers/net/wireless/ath/ath10k/debugfs_sta.c
index 31a72d41addd..95b5c49374e0 100644
--- a/drivers/net/wireless/ath/ath10k/debugfs_sta.c
+++ b/drivers/net/wireless/ath/ath10k/debugfs_sta.c
@@ -181,6 +181,57 @@ static const struct file_operations fops_addba_resp = {
         .llseek = default_llseek,
 };
 
+static ssize_t ath10k_dbg_sta_write_delba(struct file *file,
+                                          const 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;
+        struct ath10k *ar = arsta->arvif->ar;
+        u32 tid, initiator, reason;
+        int ret;
+        char buf[64];
+
+        simple_write_to_buffer(buf, sizeof(buf) - 1, ppos, user_buf, count);
+
+        /* make sure that buf is null terminated */
+        buf[sizeof(buf) - 1] = '\0';
+
+        ret = sscanf(buf, "%u %u %u", &tid, &initiator, &reason);
+        if (ret != 3)
+                return -EINVAL;
+
+        /* Valid TID values are 0 through 15 */
+        if (tid > HTT_DATA_TX_EXT_TID_MGMT - 2)
+                return -EINVAL;
+
+        mutex_lock(&ar->conf_mutex);
+        if ((ar->state != ATH10K_STATE_ON) ||
+            (arsta->aggr_mode != ATH10K_DBG_AGGR_MODE_MANUAL)) {
+                ret = count;
+                goto out;
+        }
+
+        ret = ath10k_wmi_delba_send(ar, arsta->arvif->vdev_id, sta->addr,
+                                    tid, initiator, reason);
+        if (ret) {
+                ath10k_warn(ar, "failed to send delba: vdev_id %u peer %pM tid %u initiator %u reason %u\n",
+                            arsta->arvif->vdev_id, sta->addr, tid, initiator,
+                            reason);
+        }
+        ret = count;
+out:
+        mutex_unlock(&ar->conf_mutex);
+        return ret;
+}
+
+static const struct file_operations fops_delba = {
+        .write = ath10k_dbg_sta_write_delba,
+        .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)
 {
@@ -188,4 +239,5 @@ void ath10k_sta_add_debugfs(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
                             &fops_aggr_mode);
         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);
 }