[dpdk-dev] [PATCH v2 2/2] drivers/net/mlx5: fix representor interrupts handler

[Gregory Etelson]

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 its 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 | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/net/mlx5/mlx5_rxq.c b/drivers/net/mlx5/mlx5_rxq.c
index 0693c924d0..1e2fe706ad 100644
--- a/drivers/net/mlx5/mlx5_rxq.c
+++ b/drivers/net/mlx5/mlx5_rxq.c
@@ -902,6 +902,9 @@ 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;
 	mlx5_rx_intr_vec_disable(dev);
@@ -982,6 +985,9 @@ 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)
 		return;
 	if (!intr_handle->intr_vec)
-- 
2.29.2