[dpdk-dev] [PATCH 8/8] net/iavf: support check DD bit of a RX descriptor

[Robin Zhang]

Add implementation of inline API rx_descriptor_done in iavf PMD.

Signed-off-by: Robin Zhang <robinx.zhang at intel.com>
---
 drivers/net/iavf/iavf_ethdev.c |  1 +
 drivers/net/iavf/iavf_rxtx.c   | 26 ++++++++++++++++++++++++++
 drivers/net/iavf/iavf_rxtx.h   |  1 +
 3 files changed, 28 insertions(+)

diff --git a/drivers/net/iavf/iavf_ethdev.c b/drivers/net/iavf/iavf_ethdev.c
index 836c09f58..b7a819a0e 100644
--- a/drivers/net/iavf/iavf_ethdev.c
+++ b/drivers/net/iavf/iavf_ethdev.c
@@ -1417,6 +1417,7 @@ iavf_dev_init(struct rte_eth_dev *eth_dev)
 	/* assign ops func pointer */
 	eth_dev->dev_ops = &iavf_eth_dev_ops;
 	eth_dev->rx_queue_count = iavf_dev_rxq_count;
+	eth_dev->rx_descriptor_done = iavf_dev_rx_desc_done;
 	eth_dev->rx_descriptor_status = iavf_dev_rx_desc_status;
 	eth_dev->tx_descriptor_status = iavf_dev_tx_desc_status;
 	eth_dev->rx_pkt_burst = &iavf_recv_pkts;
diff --git a/drivers/net/iavf/iavf_rxtx.c b/drivers/net/iavf/iavf_rxtx.c
index 1b0efe043..d9e3aac1d 100644
--- a/drivers/net/iavf/iavf_rxtx.c
+++ b/drivers/net/iavf/iavf_rxtx.c
@@ -2337,6 +2337,32 @@ iavf_dev_rxq_count(struct rte_eth_dev *dev, uint16_t queue_id)
 	return desc;
 }
 
+int
+iavf_dev_rx_desc_done(void *rx_queue, uint16_t offset)
+{
+	volatile union iavf_rx_desc *rxdp;
+	struct iavf_rx_queue *rxq = rx_queue;
+	uint16_t desc;
+	int ret;
+
+	if (unlikely(offset >= rxq->nb_rx_desc)) {
+		PMD_DRV_LOG(ERR, "Invalid RX descriptor id %u", offset);
+		return 0;
+	}
+
+	desc = rxq->rx_tail + offset;
+	if (desc >= rxq->nb_rx_desc)
+		desc -= rxq->nb_rx_desc;
+
+	rxdp = &rxq->rx_ring[desc];
+
+	ret = !!(((rte_le_to_cpu_64(rxdp->wb.qword1.status_error_len) &
+		IAVF_RXD_QW1_STATUS_MASK) >> IAVF_RXD_QW1_STATUS_SHIFT) &
+				(1 << IAVF_RX_DESC_STATUS_DD_SHIFT));
+
+	return ret;
+}
+
 int
 iavf_dev_rx_desc_status(void *rx_queue, uint16_t offset)
 {
diff --git a/drivers/net/iavf/iavf_rxtx.h b/drivers/net/iavf/iavf_rxtx.h
index 3d02c6589..d5c002858 100644
--- a/drivers/net/iavf/iavf_rxtx.h
+++ b/drivers/net/iavf/iavf_rxtx.h
@@ -404,6 +404,7 @@ void iavf_dev_rxq_info_get(struct rte_eth_dev *dev, uint16_t queue_id,
 void iavf_dev_txq_info_get(struct rte_eth_dev *dev, uint16_t queue_id,
 			  struct rte_eth_txq_info *qinfo);
 uint32_t iavf_dev_rxq_count(struct rte_eth_dev *dev, uint16_t queue_id);
+int iavf_dev_rx_desc_done(void *rx_queue, uint16_t offset);
 int iavf_dev_rx_desc_status(void *rx_queue, uint16_t offset);
 int iavf_dev_tx_desc_status(void *tx_queue, uint16_t offset);
 
-- 
2.17.1