[dpdk-dev] [PATCH] net/mlx5: setup RSS regardless of queue count

[Allain Legacy <allain.legacy@windriver.com>]

From: Dahir Osman <dahir.osman@windriver.com>

In some environments it is desirable to have the NIC perform RSS
normally on the packet regardless of the number of queues configured.
The RSS hash result that is stored in the mbuf can then be used by
the application to make decisions about how to distribute workloads
to threads, secondary processes, or even virtual machines if the
application is a virtual switch.  This change to the mlx5 driver
aligns with how other drivers in the Intel family work.

Signed-off-by: Allain Legacy <allain.legacy@windriver.com>
---
 drivers/net/mlx5/mlx5_rxq.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/mlx5/mlx5_rxq.c b/drivers/net/mlx5/mlx5_rxq.c
index ff58c4921..e6b05b0ad 100644
--- a/drivers/net/mlx5/mlx5_rxq.c
+++ b/drivers/net/mlx5/mlx5_rxq.c
@@ -1028,7 +1028,8 @@ mlx5_priv_rxq_new(struct priv *priv, uint16_t idx, uint16_t desc,
 	      tmpl->rxq.crc_present ? "disabled" : "enabled",
 	      tmpl->rxq.crc_present << 2);
 	/* Save port ID. */
-	tmpl->rxq.rss_hash = priv->rxqs_n > 1;
+	tmpl->rxq.rss_hash = (!!(dev->data->dev_conf.rxmode.mq_mode &
+				 ETH_MQ_RX_RSS));
 	tmpl->rxq.port_id = dev->data->port_id;
 	tmpl->priv = priv;
 	tmpl->rxq.mp = mp;
-- 
2.12.1