ath9k_htc: Add queue statistics to xmit debugfs file

Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/htc.h

@@ -257,12 +257,15 @@ struct ath9k_htc_tx_ctl {
 #define TX_STAT_INC(c) (hif_dev->htc_handle->drv_priv->debug.tx_stats.c++)
 #define RX_STAT_INC(c) (hif_dev->htc_handle->drv_priv->debug.rx_stats.c++)
 
+#define TX_QSTAT_INC(q) (priv->debug.tx_stats.queue_stats[q]++)
+
 struct ath_tx_stats {
 	u32 buf_queued;
 	u32 buf_completed;
 	u32 skb_queued;
 	u32 skb_completed;
 	u32 skb_dropped;
+	u32 queue_stats[WME_NUM_AC];
 };
 
 struct ath_rx_stats {

drivers/net/wireless/ath/ath9k/htc_drv_main.c

@@ -617,6 +617,19 @@ static ssize_t read_file_xmit(struct file *file, char __user *user_buf,
 			"%20s : %10u\n", "SKBs dropped",
 			priv->debug.tx_stats.skb_dropped);
 
+	len += snprintf(buf + len, sizeof(buf) - len,
+			"%20s : %10u\n", "BE queued",
+			priv->debug.tx_stats.queue_stats[WME_AC_BE]);
+	len += snprintf(buf + len, sizeof(buf) - len,
+			"%20s : %10u\n", "BK queued",
+			priv->debug.tx_stats.queue_stats[WME_AC_BK]);
+	len += snprintf(buf + len, sizeof(buf) - len,
+			"%20s : %10u\n", "VI queued",
+			priv->debug.tx_stats.queue_stats[WME_AC_VI]);
+	len += snprintf(buf + len, sizeof(buf) - len,
+			"%20s : %10u\n", "VO queued",
+			priv->debug.tx_stats.queue_stats[WME_AC_VO]);
+
 	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 }
 

drivers/net/wireless/ath/ath9k/htc_drv_txrx.c

@@ -135,16 +135,20 @@ int ath9k_htc_tx_start(struct ath9k_htc_priv *priv, struct sk_buff *skb)
 
 		switch (hw_qnum) {
 		case 0:
+			TX_QSTAT_INC(WME_AC_BE);
 			epid = priv->data_be_ep;
 			break;
 		case 2:
+			TX_QSTAT_INC(WME_AC_VI);
 			epid = priv->data_vi_ep;
 			break;
 		case 3:
+			TX_QSTAT_INC(WME_AC_VO);
 			epid = priv->data_vo_ep;
 			break;
 		case 1:
 		default:
+			TX_QSTAT_INC(WME_AC_BK);
 			epid = priv->data_bk_ep;
 			break;
 		}