diff mbox series

net/mlx5: fix info about Rx descriptors for MPRQ

Message ID 20201105235856.25475-1-akozyrev@nvidia.com (mailing list archive)
State Superseded, archived
Delegated to: Raslan Darawsheh
Headers
Series net/mlx5: fix info about Rx descriptors for MPRQ |

Checks

Context Check Description
ci/checkpatch warning coding style issues
ci/Intel-compilation success Compilation OK
ci/travis-robot success Travis build: passed
ci/iol-broadcom-Functional success Functional Testing PASS
ci/iol-broadcom-Performance success Performance Testing PASS
ci/iol-testing success Testing PASS
ci/iol-intel-Functional success Functional Testing PASS
ci/iol-intel-Performance success Performance Testing PASS
ci/iol-mellanox-Performance success Performance Testing PASS

Commit Message

Alexander Kozyrev Nov. 5, 2020, 11:58 p.m. UTC 
  Numbers of descriptors configured is returned to a user
via rxq_info_get API. This number is incorrect for MPRQ.
For SPRQ this number matches the number of mbufs allocated.
For MPRQ we have fewer external MPRQ buffers that can hold
multiple packets in strides os this big buffer. Take that
into account and return teh number of MPRQ buffers multiplied
by the number of strides in this case.

Fixes: 26f1bae837 ("net/mlx5: add Rx/Tx burst mode info")
Cc: stable@dpdk.org

Signed-off-by: Alexander Kozyrev <akozyrev@nvidia.com>
---
 drivers/net/mlx5/mlx5_rxtx.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/net/mlx5/mlx5_rxtx.c b/drivers/net/mlx5/mlx5_rxtx.c
index 3aee8d4def..f90124a2aa 100644
--- a/drivers/net/mlx5/mlx5_rxtx.c
+++ b/drivers/net/mlx5/mlx5_rxtx.c
@@ -566,7 +566,9 @@  mlx5_rxq_info_get(struct rte_eth_dev *dev, uint16_t rx_queue_id,
 	qinfo->conf.rx_deferred_start = rxq_ctrl ? 0 : 1;
 	qinfo->conf.offloads = dev->data->dev_conf.rxmode.offloads;
 	qinfo->scattered_rx = dev->data->scattered_rx;
-	qinfo->nb_desc = 1 << rxq->elts_n;
+	qinfo->nb_desc = mlx5_rxq_mprq_enabled(&rxq_ctrl->rxq) ?
+		(1 << rxq->elts_n) * (1 << rxq->strd_num_n) :
+		(1 << rxq->elts_n);
 }
 
 /**