[PATCH v3 09/13] net/ngbe: add Tx descriptor error statistics

[Jiawen Wu <jiawenwu@trustnetic.com>]

Count the number of packets not sent due to Tx descriptor error.

Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
---
 drivers/net/ngbe/ngbe_ethdev.c | 13 +++++++++++++
 drivers/net/ngbe/ngbe_rxtx.c   |  2 ++
 drivers/net/ngbe/ngbe_rxtx.h   |  1 +
 3 files changed, 16 insertions(+)

diff --git a/drivers/net/ngbe/ngbe_ethdev.c b/drivers/net/ngbe/ngbe_ethdev.c
index 6c45ffaad3..353d17acc8 100644
--- a/drivers/net/ngbe/ngbe_ethdev.c
+++ b/drivers/net/ngbe/ngbe_ethdev.c
@@ -1507,6 +1507,7 @@ ngbe_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 	struct ngbe_hw_stats *hw_stats = NGBE_DEV_STATS(dev);
 	struct ngbe_stat_mappings *stat_mappings =
 			NGBE_DEV_STAT_MAPPINGS(dev);
+	struct ngbe_tx_queue *txq;
 	uint32_t i, j;
 
 	ngbe_read_stats_registers(hw, hw_stats);
@@ -1559,6 +1560,11 @@ ngbe_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 
 	/* Tx Errors */
 	stats->oerrors  = 0;
+	for (i = 0; i < dev->data->nb_tx_queues; i++) {
+		txq = dev->data->tx_queues[i];
+		stats->oerrors += txq->desc_error;
+	}
+
 	return 0;
 }
 
@@ -1567,6 +1573,13 @@ ngbe_dev_stats_reset(struct rte_eth_dev *dev)
 {
 	struct ngbe_hw *hw = ngbe_dev_hw(dev);
 	struct ngbe_hw_stats *hw_stats = NGBE_DEV_STATS(dev);
+	struct ngbe_tx_queue *txq;
+	uint32_t i;
+
+	for (i = 0; i < dev->data->nb_tx_queues; i++) {
+		txq = dev->data->tx_queues[i];
+		txq->desc_error = 0;
+	}
 
 	/* HW registers are cleared on read */
 	hw->offset_loaded = 0;
diff --git a/drivers/net/ngbe/ngbe_rxtx.c b/drivers/net/ngbe/ngbe_rxtx.c
index 25a314f10a..8d31d47de9 100644
--- a/drivers/net/ngbe/ngbe_rxtx.c
+++ b/drivers/net/ngbe/ngbe_rxtx.c
@@ -629,6 +629,7 @@ ngbe_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
 		tx_pkt = *tx_pkts++;
 		if (ngbe_check_pkt_err(tx_pkt)) {
 			rte_pktmbuf_free(tx_pkt);
+			txq->desc_error++;
 			continue;
 		}
 
@@ -2100,6 +2101,7 @@ ngbe_dev_tx_queue_setup(struct rte_eth_dev *dev,
 	ngbe_set_tx_function(dev, txq);
 
 	txq->ops->reset(txq);
+	txq->desc_error = 0;
 
 	dev->data->tx_queues[queue_idx] = txq;
 
diff --git a/drivers/net/ngbe/ngbe_rxtx.h b/drivers/net/ngbe/ngbe_rxtx.h
index 7574db32d8..8534ec123a 100644
--- a/drivers/net/ngbe/ngbe_rxtx.h
+++ b/drivers/net/ngbe/ngbe_rxtx.h
@@ -375,6 +375,7 @@ struct ngbe_tx_queue {
 
 	const struct ngbe_txq_ops *ops;       /**< txq ops */
 	const struct rte_memzone *mz;
+	uint64_t            desc_error;
 };
 
 struct ngbe_txq_ops {
-- 
2.27.0