[dpdk-dev] [PATCH] net/hns3: support getting Tx and Rx queue information

["Wei Hu (Xavier)" <huwei013@chinasoftinc.com>]

From: Huisong Li <lihuisong@huawei.com>

This patch adds support for querying Rx/Tx queue information.

Currently, if there are not available Rx buffer descriptors in recieving
direction based on hns3 network engine, incoming packets will always be
dropped by hardware. This patch reports the '.rx_drop_en' information to
DPDK framework in the '.dev_infos_get', '.rxq_info_get' and
'.rx_queue_setup' ops implementation function.

Signed-off-by: Huisong Li <lihuisong@huawei.com>
Signed-off-by: Wei Hu (Xavier) <xavier.huwei@huawei.com>
---
 drivers/net/hns3/hns3_ethdev.c    | 11 +++++++
 drivers/net/hns3/hns3_ethdev_vf.c | 11 +++++++
 drivers/net/hns3/hns3_rxtx.c      | 51 +++++++++++++++++++++++++++++++
 drivers/net/hns3/hns3_rxtx.h      |  5 ++-
 4 files changed, 77 insertions(+), 1 deletion(-)

diff --git a/drivers/net/hns3/hns3_ethdev.c b/drivers/net/hns3/hns3_ethdev.c
index 81e773046..fab1914c3 100644
--- a/drivers/net/hns3/hns3_ethdev.c
+++ b/drivers/net/hns3/hns3_ethdev.c
@@ -2495,6 +2495,15 @@ hns3_dev_infos_get(struct rte_eth_dev *eth_dev, struct rte_eth_dev_info *info)
 		.nb_mtu_seg_max = HNS3_MAX_NON_TSO_BD_PER_PKT,
 	};
 
+	info->default_rxconf = (struct rte_eth_rxconf) {
+		/*
+		 * If there are no available Rx buffer descriptors, incoming
+		 * packets are always dropped by hardware based on hns3 network
+		 * engine.
+		 */
+		.rx_drop_en = 1,
+	};
+
 	info->vmdq_queue_num = 0;
 
 	info->reta_size = HNS3_RSS_IND_TBL_SIZE;
@@ -5413,6 +5422,8 @@ static const struct eth_dev_ops hns3_eth_dev_ops = {
 	.tx_queue_release       = hns3_dev_tx_queue_release,
 	.rx_queue_intr_enable   = hns3_dev_rx_queue_intr_enable,
 	.rx_queue_intr_disable  = hns3_dev_rx_queue_intr_disable,
+	.rxq_info_get           = hns3_rxq_info_get,
+	.txq_info_get           = hns3_txq_info_get,
 	.dev_configure          = hns3_dev_configure,
 	.flow_ctrl_get          = hns3_flow_ctrl_get,
 	.flow_ctrl_set          = hns3_flow_ctrl_set,
diff --git a/drivers/net/hns3/hns3_ethdev_vf.c b/drivers/net/hns3/hns3_ethdev_vf.c
index 1d2941f0e..60b576b02 100644
--- a/drivers/net/hns3/hns3_ethdev_vf.c
+++ b/drivers/net/hns3/hns3_ethdev_vf.c
@@ -947,6 +947,15 @@ hns3vf_dev_infos_get(struct rte_eth_dev *eth_dev, struct rte_eth_dev_info *info)
 		.nb_mtu_seg_max = HNS3_MAX_NON_TSO_BD_PER_PKT,
 	};
 
+	info->default_rxconf = (struct rte_eth_rxconf) {
+		/*
+		 * If there are no available Rx buffer descriptors, incoming
+		 * packets are always dropped by hardware based on hns3 network
+		 * engine.
+		 */
+		.rx_drop_en = 1,
+	};
+
 	info->vmdq_queue_num = 0;
 
 	info->reta_size = HNS3_RSS_IND_TBL_SIZE;
@@ -2473,6 +2482,8 @@ static const struct eth_dev_ops hns3vf_eth_dev_ops = {
 	.tx_queue_release   = hns3_dev_tx_queue_release,
 	.rx_queue_intr_enable   = hns3_dev_rx_queue_intr_enable,
 	.rx_queue_intr_disable  = hns3_dev_rx_queue_intr_disable,
+	.rxq_info_get       = hns3_rxq_info_get,
+	.txq_info_get       = hns3_txq_info_get,
 	.dev_configure      = hns3vf_dev_configure,
 	.mac_addr_add       = hns3vf_add_mac_addr,
 	.mac_addr_remove    = hns3vf_remove_mac_addr,
diff --git a/drivers/net/hns3/hns3_rxtx.c b/drivers/net/hns3/hns3_rxtx.c
index c0f798159..67920370a 100644
--- a/drivers/net/hns3/hns3_rxtx.c
+++ b/drivers/net/hns3/hns3_rxtx.c
@@ -1251,6 +1251,12 @@ hns3_rx_queue_setup(struct rte_eth_dev *dev, uint16_t idx, uint16_t nb_desc,
 		return -EINVAL;
 	}
 
+	if (conf->rx_drop_en == 0)
+		hns3_warn(hw, "if there are no available Rx descriptors,"
+			  "incoming packets are always dropped. input parameter"
+			  " conf->rx_drop_en(%u) is uneffective.",
+			  conf->rx_drop_en);
+
 	if (dev->data->rx_queues[idx]) {
 		hns3_rx_queue_release(dev->data->rx_queues[idx]);
 		dev->data->rx_queues[idx] = NULL;
@@ -2814,3 +2820,48 @@ void hns3_set_rxtx_function(struct rte_eth_dev *eth_dev)
 		eth_dev->tx_pkt_prepare = hns3_dummy_rxtx_burst;
 	}
 }
+
+void
+hns3_rxq_info_get(struct rte_eth_dev *dev, uint16_t queue_id,
+		  struct rte_eth_rxq_info *qinfo)
+{
+	struct hns3_hw *hw = HNS3_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+	struct hns3_rx_queue *rxq = dev->data->rx_queues[queue_id];
+
+	if (rxq == NULL) {
+		hns3_err(hw, "queue pointer of rx queue_id (%u) is NULL.",
+			 queue_id);
+		return;
+	}
+
+	qinfo->mp = rxq->mb_pool;
+	qinfo->nb_desc = rxq->nb_rx_desc;
+	qinfo->scattered_rx = dev->data->scattered_rx;
+
+	/*
+	 * If there are no available Rx buffer descriptors, incoming packets
+	 * are always dropped by hardware based on hns3 network engine.
+	 */
+	qinfo->conf.rx_drop_en = 1;
+	qinfo->conf.offloads = dev->data->dev_conf.rxmode.offloads;
+	qinfo->conf.rx_free_thresh = rxq->rx_free_thresh;
+	qinfo->conf.rx_deferred_start = rxq->rx_deferred_start;
+}
+
+void
+hns3_txq_info_get(struct rte_eth_dev *dev, uint16_t queue_id,
+		  struct rte_eth_txq_info *qinfo)
+{
+	struct hns3_hw *hw = HNS3_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+	struct hns3_tx_queue *txq = dev->data->tx_queues[queue_id];
+
+	if (txq == NULL) {
+		hns3_err(hw, "queue pointer of tx queue_id (%u) is NULL.",
+			 queue_id);
+		return;
+	}
+
+	qinfo->nb_desc = txq->nb_tx_desc;
+	qinfo->conf.offloads = dev->data->dev_conf.txmode.offloads;
+	qinfo->conf.tx_deferred_start = txq->tx_deferred_start;
+}
diff --git a/drivers/net/hns3/hns3_rxtx.h b/drivers/net/hns3/hns3_rxtx.h
index 0d20a27c8..f1fb3b56a 100644
--- a/drivers/net/hns3/hns3_rxtx.h
+++ b/drivers/net/hns3/hns3_rxtx.h
@@ -402,5 +402,8 @@ int hns3_set_fake_rx_or_tx_queues(struct rte_eth_dev *dev, uint16_t nb_rx_q,
 int hns3_config_gro(struct hns3_hw *hw, bool en);
 int hns3_restore_gro_conf(struct hns3_hw *hw);
 void hns3_update_all_queues_pvid_state(struct hns3_hw *hw);
-
+void hns3_rxq_info_get(struct rte_eth_dev *dev, uint16_t queue_id,
+		       struct rte_eth_rxq_info *qinfo);
+void hns3_txq_info_get(struct rte_eth_dev *dev, uint16_t queue_id,
+		       struct rte_eth_txq_info *qinfo);
 #endif /* _HNS3_RXTX_H_ */
-- 
2.27.0