[dpdk-dev] [PATCH V3 5/6] net/hns3: fix queue enabling state not store after FLR

[Lijun Ou]

From: Chengchang Tang <tangchengchang at huawei.com>

FLR operation will reset the queue enabling state and
the driver needs to restore the state after reset. As
a result, it will result in unpredictable behavior with
reseted when user start or stop queue by calling the
relatived function if the driver does not do this.

This patch fix it by add a queue enabling state 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>
---
V2->V3:
- rewrite commit log

V1->V2:
- no fix
---
 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 ba96724..79c0389 100644
--- a/drivers/net/hns3/hns3_ethdev.c
+++ b/drivers/net/hns3/hns3_ethdev.c
@@ -5571,6 +5571,11 @@ 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 to 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 0e63314..0366b9d 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 to 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 85316ca..4b88b46 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