[dpdk-dev] [PATCH 5/5] net/hns3: fix queue enabling status not store after FLR

[Lijun Ou]

From: Chengchang Tang <tangchengchang at huawei.com>

The FLR will resets the queue enabling status. In the
current code, the queue enabling status is not restored
after the reset. Therefore, if upper layer users have
called queue start/stop function before the reset, the
behavior after the reset is not as expected.

This patch fix it by add a queue enabling status restore
function to the reset handler.

Fixes: fa29fe45a7b4 ("net/hns3: support queue start and stop")
Cc: stable at dpdk.org

Signed-off-by: Chengchang Tang <tangchengchang at huawei.com>
Signed-off-by: Lijun Ou <oulijun at huawei.com>
---
 drivers/net/hns3/hns3_ethdev.c    |  5 +++++
 drivers/net/hns3/hns3_ethdev_vf.c |  5 +++++
 drivers/net/hns3/hns3_rxtx.c      | 20 ++++++++++++++++++++
 drivers/net/hns3/hns3_rxtx.h      |  1 +
 4 files changed, 31 insertions(+)

diff --git a/drivers/net/hns3/hns3_ethdev.c b/drivers/net/hns3/hns3_ethdev.c
index 5a76240..c1a81af 100644
--- a/drivers/net/hns3/hns3_ethdev.c
+++ b/drivers/net/hns3/hns3_ethdev.c
@@ -5569,6 +5569,11 @@ hns3_start_service(struct hns3_adapter *hns)
 		/* Enable interrupt of all rx queues before enabling queues */
 		hns3_dev_all_rx_queue_intr_enable(hw, true);
 		/*
+		 * Enable state of each rxq and txq will be recovered after
+		 * reset, so we need restore them before enable all tqps;
+		 */
+		hns3_restore_tqp_enable_state(hw);
+		/*
 		 * When finished the initialization, enable queues to receive
 		 * and transmit packets.
 		 */
diff --git a/drivers/net/hns3/hns3_ethdev_vf.c b/drivers/net/hns3/hns3_ethdev_vf.c
index 2f6d91b..511cd26 100644
--- a/drivers/net/hns3/hns3_ethdev_vf.c
+++ b/drivers/net/hns3/hns3_ethdev_vf.c
@@ -2424,6 +2424,11 @@ hns3vf_start_service(struct hns3_adapter *hns)
 		/* Enable interrupt of all rx queues before enabling queues */
 		hns3_dev_all_rx_queue_intr_enable(hw, true);
 		/*
+		 * Enable state of each rxq and txq will be recovered after
+		 * reset, so we need restore them before enable all tqps;
+		 */
+		hns3_restore_tqp_enable_state(hw);
+		/*
 		 * When finished the initialization, enable queues to receive
 		 * and transmit packets.
 		 */
diff --git a/drivers/net/hns3/hns3_rxtx.c b/drivers/net/hns3/hns3_rxtx.c
index 285c06d..c76e635 100644
--- a/drivers/net/hns3/hns3_rxtx.c
+++ b/drivers/net/hns3/hns3_rxtx.c
@@ -503,6 +503,26 @@ hns3_start_all_rxqs(struct rte_eth_dev *dev)
 }
 
 void
+hns3_restore_tqp_enable_state(struct hns3_hw *hw)
+{
+	struct hns3_rx_queue *rxq;
+	struct hns3_tx_queue *txq;
+	uint16_t i;
+
+	for (i = 0; i < hw->data->nb_rx_queues; i++) {
+		rxq = hw->data->rx_queues[i];
+		if (rxq != NULL)
+			hns3_enable_rxq(rxq, rxq->enabled);
+	}
+
+	for (i = 0; i < hw->data->nb_tx_queues; i++) {
+		txq = hw->data->tx_queues[i];
+		if (txq != NULL)
+			hns3_enable_txq(txq, txq->enabled);
+	}
+}
+
+void
 hns3_stop_all_txqs(struct rte_eth_dev *dev)
 {
 	struct hns3_hw *hw = HNS3_DEV_PRIVATE_TO_HW(dev->data->dev_private);
diff --git a/drivers/net/hns3/hns3_rxtx.h b/drivers/net/hns3/hns3_rxtx.h
index 8b32abe..6538848 100644
--- a/drivers/net/hns3/hns3_rxtx.h
+++ b/drivers/net/hns3/hns3_rxtx.h
@@ -677,5 +677,6 @@ uint32_t hns3_get_tqp_reg_offset(uint16_t idx);
 int hns3_start_all_txqs(struct rte_eth_dev *dev);
 int hns3_start_all_rxqs(struct rte_eth_dev *dev);
 void hns3_stop_all_txqs(struct rte_eth_dev *dev);
+void hns3_restore_tqp_enable_state(struct hns3_hw *hw);
 
 #endif /* _HNS3_RXTX_H_ */
-- 
2.7.4