[dpdk-dev] [PATCH v3 7/8] net/hns3: support query Tx descriptor status

["Min Hu (Connor)" <humin29@huawei.com>]

From: Hongbo Zheng <zhenghongbo3@huawei.com>

Add support for query Tx descriptor status in hns3 driver. Check the
descriptor specified and provide the status information of the
corresponding descriptor.

Signed-off-by: Hongbo Zheng <zhenghongbo3@huawei.com>
Signed-off-by: Min Hu (Connor) <humin29@huawei.com>
---
 doc/guides/nics/features/hns3.ini      |  1 +
 doc/guides/nics/features/hns3_vf.ini   |  1 +
 doc/guides/rel_notes/release_21_05.rst |  1 +
 drivers/net/hns3/hns3_ethdev.c         |  1 +
 drivers/net/hns3/hns3_ethdev_vf.c      |  1 +
 drivers/net/hns3/hns3_rxtx.c           | 28 ++++++++++++++++++++++++++++
 drivers/net/hns3/hns3_rxtx.h           |  1 +
 7 files changed, 34 insertions(+)

diff --git a/doc/guides/nics/features/hns3.ini b/doc/guides/nics/features/hns3.ini
index 3aeea8e..2c0cb89 100644
--- a/doc/guides/nics/features/hns3.ini
+++ b/doc/guides/nics/features/hns3.ini
@@ -35,6 +35,7 @@ L4 checksum offload  = Y
 Inner L3 checksum    = Y
 Inner L4 checksum    = Y
 Packet type parsing  = Y
+Tx descriptor status = Y
 Basic stats          = Y
 Extended stats       = Y
 Stats per queue      = Y
diff --git a/doc/guides/nics/features/hns3_vf.ini b/doc/guides/nics/features/hns3_vf.ini
index c796cd5..e60b09b 100644
--- a/doc/guides/nics/features/hns3_vf.ini
+++ b/doc/guides/nics/features/hns3_vf.ini
@@ -32,6 +32,7 @@ L4 checksum offload  = Y
 Inner L3 checksum    = Y
 Inner L4 checksum    = Y
 Packet type parsing  = Y
+Tx descriptor status = Y
 Basic stats          = Y
 Extended stats       = Y
 Stats per queue      = Y
diff --git a/doc/guides/rel_notes/release_21_05.rst b/doc/guides/rel_notes/release_21_05.rst
index c3324d8..e8b0c6e 100644
--- a/doc/guides/rel_notes/release_21_05.rst
+++ b/doc/guides/rel_notes/release_21_05.rst
@@ -62,6 +62,7 @@ New Features
   * Added support for copper port in Kunpeng930.
   * Added support for runtime config to select IO burst function.
   * Added support for outer UDP checksum in Kunpeng930.
+  * Added support for query Tx descriptor status.
 
 * **Updated NXP DPAA2 driver.**
 
diff --git a/drivers/net/hns3/hns3_ethdev.c b/drivers/net/hns3/hns3_ethdev.c
index 82538d4..8c65be4 100644
--- a/drivers/net/hns3/hns3_ethdev.c
+++ b/drivers/net/hns3/hns3_ethdev.c
@@ -6774,6 +6774,7 @@ hns3_dev_init(struct rte_eth_dev *eth_dev)
 	eth_dev->rx_pkt_burst = NULL;
 	eth_dev->tx_pkt_burst = NULL;
 	eth_dev->tx_pkt_prepare = NULL;
+	eth_dev->tx_descriptor_status = NULL;
 	rte_free(eth_dev->process_private);
 	eth_dev->process_private = NULL;
 	return ret;
diff --git a/drivers/net/hns3/hns3_ethdev_vf.c b/drivers/net/hns3/hns3_ethdev_vf.c
index 7ee468f..4412da3 100644
--- a/drivers/net/hns3/hns3_ethdev_vf.c
+++ b/drivers/net/hns3/hns3_ethdev_vf.c
@@ -2917,6 +2917,7 @@ hns3vf_dev_init(struct rte_eth_dev *eth_dev)
 	eth_dev->rx_pkt_burst = NULL;
 	eth_dev->tx_pkt_burst = NULL;
 	eth_dev->tx_pkt_prepare = NULL;
+	eth_dev->tx_descriptor_status = NULL;
 	rte_free(eth_dev->process_private);
 	eth_dev->process_private = NULL;
 
diff --git a/drivers/net/hns3/hns3_rxtx.c b/drivers/net/hns3/hns3_rxtx.c
index 7529279..a84da15 100644
--- a/drivers/net/hns3/hns3_rxtx.c
+++ b/drivers/net/hns3/hns3_rxtx.c
@@ -4044,6 +4044,7 @@ void hns3_set_rxtx_function(struct rte_eth_dev *eth_dev)
 		eth_dev->rx_pkt_burst = hns3_get_rx_function(eth_dev);
 		eth_dev->tx_pkt_burst = hns3_get_tx_function(eth_dev, &prep);
 		eth_dev->tx_pkt_prepare = prep;
+		eth_dev->tx_descriptor_status = hns3_dev_tx_descriptor_status;
 	} else {
 		eth_dev->rx_pkt_burst = hns3_dummy_rxtx_burst;
 		eth_dev->tx_pkt_burst = hns3_dummy_rxtx_burst;
@@ -4256,6 +4257,33 @@ hns3_tx_done_cleanup(void *txq, uint32_t free_cnt)
 		return -ENOTSUP;
 }
 
+int
+hns3_dev_tx_descriptor_status(void *tx_queue, uint16_t offset)
+{
+	volatile struct hns3_desc *txdp;
+	struct hns3_tx_queue *txq;
+	struct rte_eth_dev *dev;
+	uint16_t desc_id;
+
+	txq = (struct hns3_tx_queue *)tx_queue;
+	if (offset >= txq->nb_tx_desc)
+		return -EINVAL;
+
+	dev = &rte_eth_devices[txq->port_id];
+	if (dev->tx_pkt_burst != hns3_xmit_pkts_simple &&
+	    dev->tx_pkt_burst != hns3_xmit_pkts &&
+	    dev->tx_pkt_burst != hns3_xmit_pkts_vec_sve &&
+	    dev->tx_pkt_burst != hns3_xmit_pkts_vec)
+		return RTE_ETH_TX_DESC_UNAVAIL;
+
+	desc_id = (txq->next_to_use + offset) % txq->nb_tx_desc;
+	txdp = &txq->tx_ring[desc_id];
+	if (txdp->tx.tp_fe_sc_vld_ra_ri & rte_cpu_to_le_16(BIT(HNS3_TXD_VLD_B)))
+		return RTE_ETH_TX_DESC_FULL;
+	else
+		return RTE_ETH_TX_DESC_DONE;
+}
+
 uint32_t
 hns3_rx_queue_count(struct rte_eth_dev *dev, uint16_t rx_queue_id)
 {
diff --git a/drivers/net/hns3/hns3_rxtx.h b/drivers/net/hns3/hns3_rxtx.h
index cd04200..82d5aa0 100644
--- a/drivers/net/hns3/hns3_rxtx.h
+++ b/drivers/net/hns3/hns3_rxtx.h
@@ -720,5 +720,6 @@ void hns3_stop_all_txqs(struct rte_eth_dev *dev);
 void hns3_restore_tqp_enable_state(struct hns3_hw *hw);
 int hns3_tx_done_cleanup(void *txq, uint32_t free_cnt);
 void hns3_enable_rxd_adv_layout(struct hns3_hw *hw);
+int hns3_dev_tx_descriptor_status(void *tx_queue, uint16_t offset);
 
 #endif /* _HNS3_RXTX_H_ */
-- 
2.7.4