From: Wei Hu (Xavier) <xavier.huwei@huawei.com>
Date: Mon, 24 Aug 2020 11:01:28 +0000 (+0800)
Subject: net/hns3: report Rx drop packets enable configuration
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=a02f1461c75b4be31d4a37ea3fae95aee86cdff2;p=dpdk.git

net/hns3: report Rx drop packets enable configuration

Currently, if there are not available Rx buffer descriptors in receiving
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>
---

diff --git a/drivers/net/hns3/hns3_ethdev.c b/drivers/net/hns3/hns3_ethdev.c
index 81e773046e..bcbbd7e81b 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;
diff --git a/drivers/net/hns3/hns3_ethdev_vf.c b/drivers/net/hns3/hns3_ethdev_vf.c
index 63089d0bd4..e6c69ce75f 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;
diff --git a/drivers/net/hns3/hns3_rxtx.c b/drivers/net/hns3/hns3_rxtx.c
index c0f798159c..3e5e32e387 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;