[dpdk-dev] [PATCH 1/2] drivers/net/mlx5: fix representor interrupts handler

Gregory Etelson getelson at nvidia.com
Wed Oct 28 10:59:34 CET 2020

Representor is a port in DPDK that is connected to a VF in such a way
that assuming there are no offload flows, each packet that is sent
from the VF will be received by the corresponding representor. While
each packet that is sent to a representor will be received by the VF.
This is very useful in case of SRIOV mode, where the first packet that
is sent by the VF will be received by the DPDK application which will
decide if this flow should be offloaded to the E-Switch.

Representor shares interrupts handler with host PF over the PCI
address. Therefore after PF completes it's interrupts handler
initialization no additional actions required for representor.

Fixes: 26c08b979d26 ("net/mlx5: add port representor awareness")

Signed-off-by: Gregory Etelson <getelson at nvidia.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo at nvidia.com>
 drivers/net/mlx5/mlx5_rxq.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/net/mlx5/mlx5_rxq.c b/drivers/net/mlx5/mlx5_rxq.c
index 8d05315e61..df8542f7db 100644
--- a/drivers/net/mlx5/mlx5_rxq.c
+++ b/drivers/net/mlx5/mlx5_rxq.c
@@ -902,6 +902,11 @@ mlx5_rx_intr_vec_enable(struct rte_eth_dev *dev)
 	unsigned int count = 0;
 	struct rte_intr_handle *intr_handle = dev->intr_handle;
+	/**
+	 * representor shares dev->intr_handle with PF
+	 */
+	if (priv->representor)
+		return 0;
 	if (!dev->data->dev_conf.intr_conf.rxq)
 		return 0;
@@ -982,6 +987,11 @@ mlx5_rx_intr_vec_disable(struct rte_eth_dev *dev)
 	unsigned int rxqs_n = priv->rxqs_n;
 	unsigned int n = RTE_MIN(rxqs_n, (uint32_t)RTE_MAX_RXTX_INTR_VEC_ID);
+	/**
+	 * representor shares dev->intr_handle with PF
+	 */
+	if (priv->representor)
+		return;
 	if (!dev->data->dev_conf.intr_conf.rxq)
 	if (!intr_handle->intr_vec)

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