[PATCH v3 07/13] net/txgbe: 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/txgbe/txgbe_ethdev.c | 13 +++++++++++++
 drivers/net/txgbe/txgbe_rxtx.c   |  6 ++++++
 drivers/net/txgbe/txgbe_rxtx.h   |  1 +
 3 files changed, 20 insertions(+)

diff --git a/drivers/net/txgbe/txgbe_ethdev.c b/drivers/net/txgbe/txgbe_ethdev.c
index bafa9cf829..a956216abb 100644
--- a/drivers/net/txgbe/txgbe_ethdev.c
+++ b/drivers/net/txgbe/txgbe_ethdev.c
@@ -2344,6 +2344,7 @@ txgbe_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 	struct txgbe_hw_stats *hw_stats = TXGBE_DEV_STATS(dev);
 	struct txgbe_stat_mappings *stat_mappings =
 			TXGBE_DEV_STAT_MAPPINGS(dev);
+	struct txgbe_tx_queue *txq;
 	uint32_t i, j;
 
 	txgbe_read_stats_registers(hw, hw_stats);
@@ -2398,6 +2399,11 @@ txgbe_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;
 }
 
@@ -2406,6 +2412,13 @@ txgbe_dev_stats_reset(struct rte_eth_dev *dev)
 {
 	struct txgbe_hw *hw = TXGBE_DEV_HW(dev);
 	struct txgbe_hw_stats *hw_stats = TXGBE_DEV_STATS(dev);
+	struct txgbe_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/txgbe/txgbe_rxtx.c b/drivers/net/txgbe/txgbe_rxtx.c
index 06acbd0881..4e4b78fb43 100644
--- a/drivers/net/txgbe/txgbe_rxtx.c
+++ b/drivers/net/txgbe/txgbe_rxtx.c
@@ -894,6 +894,7 @@ txgbe_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts,
 		tx_pkt = *tx_pkts++;
 		if (txgbe_check_pkt_err(tx_pkt)) {
 			rte_pktmbuf_free(tx_pkt);
+			txq->desc_error++;
 			continue;
 		}
 
@@ -2523,6 +2524,7 @@ txgbe_dev_tx_queue_setup(struct rte_eth_dev *dev,
 	txgbe_set_tx_function(dev, txq);
 
 	txq->ops->reset(txq);
+	txq->desc_error = 0;
 
 	dev->data->tx_queues[queue_idx] = txq;
 
@@ -4980,6 +4982,10 @@ txgbe_tx_queue_clear_error(void *param)
 		if (!txq->resetting)
 			continue;
 
+		/* Increase the count of Tx desc error since
+		 * it causes the queue reset.
+		 */
+		txq->desc_error++;
 		txgbe_dev_save_tx_queue(hw, i);
 
 		/* tx ring reset */
diff --git a/drivers/net/txgbe/txgbe_rxtx.h b/drivers/net/txgbe/txgbe_rxtx.h
index e668b60b1e..622a0d3981 100644
--- a/drivers/net/txgbe/txgbe_rxtx.h
+++ b/drivers/net/txgbe/txgbe_rxtx.h
@@ -412,6 +412,7 @@ struct txgbe_tx_queue {
 	/**< indicates that IPsec TX feature is in use */
 #endif
 	const struct rte_memzone *mz;
+	uint64_t	    desc_error;
 	bool		    resetting;
 };
 
-- 
2.27.0