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net/mlx5: fix Rx descriptors info for MPRQ

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The number of descriptors configured is returned to a user
via the 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 of this big buffer. Take that
into account and return the number of MPRQ buffers multiplied
by the number of strides in this case.

Fixes: 26f1bae837eb ("net/mlx5: add Rx/Tx burst mode info")
Cc: stable@dpdk.org

Signed-off-by: Alexander Kozyrev <akozyrev@nvidia.com>
Acked-by: Viacheslav Ovsiienko <viacheslavo@nvidia.com>
This commit is contained in:
Alexander Kozyrev 2020-11-08 04:28:04 +00:00 committed by Ferruh Yigit
parent 5c68764377
commit 70a3ee6bb7
1 changed files with 4 additions and 2 deletions
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6
drivers/net/mlx5/mlx5_rxtx.c
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@ -548,7 +548,7 @@ mlx5_rxq_info_get(struct rte_eth_dev *dev, uint16_t rx_queue_id,
if (!rxq)
return;
qinfo->mp = mlx5_rxq_mprq_enabled(&rxq_ctrl->rxq) ?
qinfo->mp = mlx5_rxq_mprq_enabled(rxq) ?
rxq->mprq_mp : rxq->mp;
qinfo->conf.rx_thresh.pthresh = 0;
qinfo->conf.rx_thresh.hthresh = 0;
@ -558,7 +558,9 @@ 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) ?
(1 << rxq->elts_n) * (1 << rxq->strd_num_n) :
(1 << rxq->elts_n);
}
/**