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

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

From: Hongbo Zheng <zhenghongbo3@huawei.com>

Add support for query Rx 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           | 36 ++++++++++++++++++++++++++++++++++
 drivers/net/hns3/hns3_rxtx.h           |  1 +
 7 files changed, 42 insertions(+)

diff --git a/doc/guides/nics/features/hns3.ini b/doc/guides/nics/features/hns3.ini
index 2c0cb89..3988be4 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
+Rx descriptor status = Y
 Tx descriptor status = Y
 Basic stats          = Y
 Extended stats       = Y
diff --git a/doc/guides/nics/features/hns3_vf.ini b/doc/guides/nics/features/hns3_vf.ini
index e60b09b..1640669 100644
--- a/doc/guides/nics/features/hns3_vf.ini
+++ b/doc/guides/nics/features/hns3_vf.ini
@@ -33,6 +33,7 @@ Inner L3 checksum    = Y
 Inner L4 checksum    = Y
 Packet type parsing  = Y
 Tx descriptor status = Y
+Rx 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 e8b0c6e..6e1fc81 100644
--- a/doc/guides/rel_notes/release_21_05.rst
+++ b/doc/guides/rel_notes/release_21_05.rst
@@ -63,6 +63,7 @@ New Features
   * 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.
+  * Added support for query Rx descriptor status.
 
 * **Updated NXP DPAA2 driver.**
 
diff --git a/drivers/net/hns3/hns3_ethdev.c b/drivers/net/hns3/hns3_ethdev.c
index 8c65be4..b7bfac8 100644
--- a/drivers/net/hns3/hns3_ethdev.c
+++ b/drivers/net/hns3/hns3_ethdev.c
@@ -6772,6 +6772,7 @@ hns3_dev_init(struct rte_eth_dev *eth_dev)
 err_mp_init_secondary:
 	eth_dev->dev_ops = NULL;
 	eth_dev->rx_pkt_burst = NULL;
+	eth_dev->rx_descriptor_status = NULL;
 	eth_dev->tx_pkt_burst = NULL;
 	eth_dev->tx_pkt_prepare = NULL;
 	eth_dev->tx_descriptor_status = NULL;
diff --git a/drivers/net/hns3/hns3_ethdev_vf.c b/drivers/net/hns3/hns3_ethdev_vf.c
index 4412da3..34a6927 100644
--- a/drivers/net/hns3/hns3_ethdev_vf.c
+++ b/drivers/net/hns3/hns3_ethdev_vf.c
@@ -2915,6 +2915,7 @@ hns3vf_dev_init(struct rte_eth_dev *eth_dev)
 err_mp_init_secondary:
 	eth_dev->dev_ops = NULL;
 	eth_dev->rx_pkt_burst = NULL;
+	eth_dev->rx_descriptor_status = NULL;
 	eth_dev->tx_pkt_burst = NULL;
 	eth_dev->tx_pkt_prepare = NULL;
 	eth_dev->tx_descriptor_status = NULL;
diff --git a/drivers/net/hns3/hns3_rxtx.c b/drivers/net/hns3/hns3_rxtx.c
index a84da15..feeb702 100644
--- a/drivers/net/hns3/hns3_rxtx.c
+++ b/drivers/net/hns3/hns3_rxtx.c
@@ -4042,6 +4042,7 @@ void hns3_set_rxtx_function(struct rte_eth_dev *eth_dev)
 	if (hns->hw.adapter_state == HNS3_NIC_STARTED &&
 	    __atomic_load_n(&hns->hw.reset.resetting, __ATOMIC_RELAXED) == 0) {
 		eth_dev->rx_pkt_burst = hns3_get_rx_function(eth_dev);
+		eth_dev->rx_descriptor_status = hns3_dev_rx_descriptor_status;
 		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;
@@ -4258,6 +4259,41 @@ hns3_tx_done_cleanup(void *txq, uint32_t free_cnt)
 }
 
 int
+hns3_dev_rx_descriptor_status(void *rx_queue, uint16_t offset)
+{
+	volatile struct hns3_desc *rxdp;
+	struct hns3_rx_queue *rxq;
+	struct rte_eth_dev *dev;
+	uint32_t bd_base_info;
+	uint16_t desc_id;
+
+	rxq = (struct hns3_rx_queue *)rx_queue;
+	if (offset >= rxq->nb_rx_desc)
+		return -EINVAL;
+
+	desc_id = (rxq->next_to_use + offset) % rxq->nb_rx_desc;
+	rxdp = &rxq->rx_ring[desc_id];
+	bd_base_info = rte_le_to_cpu_32(rxdp->rx.bd_base_info);
+	dev = &rte_eth_devices[rxq->port_id];
+	if (dev->rx_pkt_burst == hns3_recv_pkts ||
+	    dev->rx_pkt_burst == hns3_recv_scattered_pkts) {
+		if (offset >= rxq->nb_rx_desc - rxq->rx_free_hold)
+			return RTE_ETH_RX_DESC_UNAVAIL;
+	} else if (dev->rx_pkt_burst == hns3_recv_pkts_vec ||
+		   dev->rx_pkt_burst == hns3_recv_pkts_vec_sve){
+		if (offset >= rxq->nb_rx_desc - rxq->rx_rearm_nb)
+			return RTE_ETH_RX_DESC_UNAVAIL;
+	} else {
+		return RTE_ETH_RX_DESC_UNAVAIL;
+	}
+
+	if (!(bd_base_info & BIT(HNS3_RXD_VLD_B)))
+		return RTE_ETH_RX_DESC_AVAIL;
+	else
+		return RTE_ETH_RX_DESC_DONE;
+}
+
+int
 hns3_dev_tx_descriptor_status(void *tx_queue, uint16_t offset)
 {
 	volatile struct hns3_desc *txdp;
diff --git a/drivers/net/hns3/hns3_rxtx.h b/drivers/net/hns3/hns3_rxtx.h
index 82d5aa0..f9b3048 100644
--- a/drivers/net/hns3/hns3_rxtx.h
+++ b/drivers/net/hns3/hns3_rxtx.h
@@ -720,6 +720,7 @@ 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_rx_descriptor_status(void *rx_queue, uint16_t offset);
 int hns3_dev_tx_descriptor_status(void *tx_queue, uint16_t offset);
 
 #endif /* _HNS3_RXTX_H_ */
-- 
2.7.4