[dpdk-dev] [PATCH 2/4] i40e: PF Add support for per-queue start/stop

["Chen Jing D(Mark)" <jing.d.chen@intel.com>]

From: "Chen Jing D(Mark)" <jing.d.chen@intel.com>

I40E driver add function pointer to start/stop specific RX/TX queue.

Signed-off-by: Chen Jing D(Mark) <jing.d.chen@intel.com>
Reviewed-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
Reviewed-by: Changchun Ouyang <changchun.ouyang@intel.com>
Reviewed-by: Huawei Xie <huawei.xie@intel.com>
---
 lib/librte_pmd_i40e/i40e_ethdev.c |    4 +
 lib/librte_pmd_i40e/i40e_rxtx.c   |  112 +++++++++++++++++++++++++++++++++++++
 lib/librte_pmd_i40e/i40e_rxtx.h   |    4 +
 3 files changed, 120 insertions(+), 0 deletions(-)

diff --git a/lib/librte_pmd_i40e/i40e_ethdev.c b/lib/librte_pmd_i40e/i40e_ethdev.c
index 9ed31b5..81a1deb 100644
--- a/lib/librte_pmd_i40e/i40e_ethdev.c
+++ b/lib/librte_pmd_i40e/i40e_ethdev.c
@@ -232,6 +232,10 @@ static struct eth_dev_ops i40e_eth_dev_ops = {
 	.vlan_offload_set             = i40e_vlan_offload_set,
 	.vlan_strip_queue_set         = i40e_vlan_strip_queue_set,
 	.vlan_pvid_set                = i40e_vlan_pvid_set,
+	.rx_queue_start               = i40e_dev_rx_queue_start,
+	.rx_queue_stop                = i40e_dev_rx_queue_stop,
+	.tx_queue_start               = i40e_dev_tx_queue_start,
+	.tx_queue_stop                = i40e_dev_tx_queue_stop,
 	.rx_queue_setup               = i40e_dev_rx_queue_setup,
 	.rx_queue_release             = i40e_dev_rx_queue_release,
 	.rx_queue_count               = i40e_dev_rx_queue_count,
diff --git a/lib/librte_pmd_i40e/i40e_rxtx.c b/lib/librte_pmd_i40e/i40e_rxtx.c
index 83b9462..323c004 100644
--- a/lib/librte_pmd_i40e/i40e_rxtx.c
+++ b/lib/librte_pmd_i40e/i40e_rxtx.c
@@ -1429,6 +1429,118 @@ i40e_xmit_pkts_simple(void *tx_queue,
 }
 
 int
+i40e_dev_rx_queue_start(struct rte_eth_dev *dev, uint16_t rx_queue_id)
+{
+	struct i40e_vsi *vsi = I40E_DEV_PRIVATE_TO_VSI(dev->data->dev_private);
+	struct i40e_rx_queue *rxq;
+	int err = -1;
+	struct i40e_hw *hw = I40E_VSI_TO_HW(vsi);
+	uint16_t q_base = vsi->base_queue;
+
+	PMD_INIT_FUNC_TRACE();
+
+	if (rx_queue_id < dev->data->nb_rx_queues) {
+		rxq = dev->data->rx_queues[rx_queue_id];
+
+		err = i40e_alloc_rx_queue_mbufs(rxq);
+		if (err) {
+			PMD_DRV_LOG(ERR, "Failed to allocate RX queue mbuf\n");
+			return err;
+		}
+
+		rte_wmb();
+
+		/* Init the RX tail regieter. */
+		I40E_PCI_REG_WRITE(rxq->qrx_tail, rxq->nb_rx_desc - 1);
+
+		err = i40e_switch_rx_queue(hw, rx_queue_id + q_base, TRUE);
+
+		if (err) {
+			PMD_DRV_LOG(ERR, "Failed to switch RX queue %u on\n",
+				rx_queue_id);
+
+			i40e_rx_queue_release_mbufs(rxq);
+			i40e_reset_rx_queue(rxq);
+		}
+	}
+
+	return err;
+}
+
+int
+i40e_dev_rx_queue_stop(struct rte_eth_dev *dev, uint16_t rx_queue_id)
+{
+	struct i40e_vsi *vsi = I40E_DEV_PRIVATE_TO_VSI(dev->data->dev_private);
+	struct i40e_rx_queue *rxq;
+	int err;
+	struct i40e_hw *hw = I40E_VSI_TO_HW(vsi);
+	uint16_t q_base = vsi->base_queue;
+
+	if (rx_queue_id < dev->data->nb_rx_queues) {
+		rxq = dev->data->rx_queues[rx_queue_id];
+
+		err = i40e_switch_rx_queue(hw, rx_queue_id + q_base, FALSE);
+
+		if (err) {
+			PMD_DRV_LOG(ERR, "Failed to switch RX queue %u off\n",
+				rx_queue_id);
+			return err;
+		}
+		i40e_rx_queue_release_mbufs(rxq);
+		i40e_reset_rx_queue(rxq);
+	}
+
+	return 0;
+}
+
+int
+i40e_dev_tx_queue_start(struct rte_eth_dev *dev, uint16_t tx_queue_id)
+{
+	struct i40e_vsi *vsi = I40E_DEV_PRIVATE_TO_VSI(dev->data->dev_private);
+	int err = -1;
+	struct i40e_hw *hw = I40E_VSI_TO_HW(vsi);
+	uint16_t q_base = vsi->base_queue;
+
+	PMD_INIT_FUNC_TRACE();
+
+	if (tx_queue_id < dev->data->nb_tx_queues) {
+		err = i40e_switch_tx_queue(hw, tx_queue_id + q_base, TRUE);
+		if (err)
+			PMD_DRV_LOG(ERR, "Failed to switch TX queue %u on\n",
+				tx_queue_id);
+	}
+
+	return err;
+}
+
+int
+i40e_dev_tx_queue_stop(struct rte_eth_dev *dev, uint16_t tx_queue_id)
+{
+	struct i40e_vsi *vsi = I40E_DEV_PRIVATE_TO_VSI(dev->data->dev_private);
+	struct i40e_tx_queue *txq;
+	int err;
+	struct i40e_hw *hw = I40E_VSI_TO_HW(vsi);
+	uint16_t q_base = vsi->base_queue;
+
+	if (tx_queue_id < dev->data->nb_tx_queues) {
+		txq = dev->data->tx_queues[tx_queue_id];
+
+		err = i40e_switch_tx_queue(hw, tx_queue_id + q_base, FALSE);
+
+		if (err) {
+			PMD_DRV_LOG(ERR, "Failed to switch TX queue %u of\n",
+				tx_queue_id);
+			return err;
+		}
+
+		i40e_tx_queue_release_mbufs(txq);
+		i40e_reset_tx_queue(txq);
+	}
+
+	return 0;
+}
+
+int
 i40e_dev_rx_queue_setup(struct rte_eth_dev *dev,
 			uint16_t queue_idx,
 			uint16_t nb_desc,
diff --git a/lib/librte_pmd_i40e/i40e_rxtx.h b/lib/librte_pmd_i40e/i40e_rxtx.h
index 6db2faf..b67b4b3 100644
--- a/lib/librte_pmd_i40e/i40e_rxtx.h
+++ b/lib/librte_pmd_i40e/i40e_rxtx.h
@@ -152,6 +152,10 @@ struct i40e_tx_queue {
 	bool q_set; /**< indicate if tx queue has been configured */
 };
 
+int i40e_dev_rx_queue_start(struct rte_eth_dev *dev, uint16_t rx_queue_id);
+int i40e_dev_rx_queue_stop(struct rte_eth_dev *dev, uint16_t rx_queue_id);
+int i40e_dev_tx_queue_start(struct rte_eth_dev *dev, uint16_t tx_queue_id);
+int i40e_dev_tx_queue_stop(struct rte_eth_dev *dev, uint16_t tx_queue_id);
 int i40e_dev_rx_queue_setup(struct rte_eth_dev *dev,
 			    uint16_t queue_idx,
 			    uint16_t nb_desc,
-- 
1.7.7.6