iwlwifi: debugfs file for txfifo command testing

Add debugfs file for REPLY_TXFIFO_FLUSH host command testing.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>

1 files changed, 27 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-debugfs.c b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
index 48f890883f4e..088a2c13f59b 100644
--- a/drivers/net/wireless/iwlwifi/iwl-debugfs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
@@ -1495,6 +1495,30 @@ static ssize_t iwl_dbgfs_force_reset_write(struct file *file,
         return ret ? ret : count;
 }
 
+static ssize_t iwl_dbgfs_txfifo_flush_write(struct file *file,
+                                        const char __user *user_buf,
+                                        size_t count, loff_t *ppos) {
+
+        struct iwl_priv *priv = file->private_data;
+        char buf[8];
+        int buf_size;
+        int flush;
+
+        memset(buf, 0, sizeof(buf));
+        buf_size = min(count, sizeof(buf) -  1);
+        if (copy_from_user(buf, user_buf, buf_size))
+                return -EFAULT;
+        if (sscanf(buf, "%d", &flush) != 1)
+                return -EINVAL;
+
+        if (iwl_is_rfkill(priv))
+                return -EFAULT;
+
+        priv->cfg->ops->lib->dev_txfifo_flush(priv, IWL_DROP_ALL);
+
+        return count;
+}
+
 DEBUGFS_READ_FILE_OPS(rx_statistics);
 DEBUGFS_READ_FILE_OPS(tx_statistics);
 DEBUGFS_READ_WRITE_FILE_OPS(traffic_log);
@@ -1516,6 +1540,7 @@ DEBUGFS_READ_WRITE_FILE_OPS(plcp_delta);
 DEBUGFS_READ_WRITE_FILE_OPS(force_reset);
 DEBUGFS_READ_FILE_OPS(rxon_flags);
 DEBUGFS_READ_FILE_OPS(rxon_filter_flags);
+DEBUGFS_WRITE_FILE_OPS(txfifo_flush);
 
 /*
  * Create the debugfs files and directories
@@ -1574,6 +1599,8 @@ int iwl_dbgfs_register(struct iwl_priv *priv, const char *name)
         DEBUGFS_ADD_FILE(ucode_rx_stats, dir_debug, S_IRUSR);
         DEBUGFS_ADD_FILE(ucode_tx_stats, dir_debug, S_IRUSR);
         DEBUGFS_ADD_FILE(ucode_general_stats, dir_debug, S_IRUSR);
+        if (priv->cfg->ops->lib->dev_txfifo_flush)
+                DEBUGFS_ADD_FILE(txfifo_flush, dir_debug, S_IWUSR);
 
         if (priv->cfg->sensitivity_calib_by_driver)
                 DEBUGFS_ADD_FILE(sensitivity, dir_debug, S_IRUSR);