Kindly ping for review. Thanks.
> -----Original Message-----
> From: Liangxing Wang <[email protected]>
> Sent: 2026年7月1日 14:14
> To: [email protected]; [email protected]
> Cc: [email protected]; Liangxing Wang <[email protected]>
> Subject: [PATCH] net/vhost: support queue info query
>
> Add Rx and Tx queue info callbacks to report the vhost-user vring size as the
> queue descriptor number.
>
> The vhost-user PMD does not use the descriptor count passed by
> rte_eth_rx_queue_setup() and rte_eth_tx_queue_setup(). The actual queue
> depth is negotiated with the virtio frontend and maintained by the vhost
> library. Query the vhost vring and report its size through rxq_info_get and
> txq_info_get.
>
> With this change, testpmd using vhost-user PMD can display the correct Rx and
> Tx queue descriptor number in the port start log.
>
> Signed-off-by: Liangxing Wang <[email protected]>
> ---
> drivers/net/vhost/rte_eth_vhost.c | 38 +++++++++++++++++++++++++++++++
> 1 file changed, 38 insertions(+)
>
> diff --git a/drivers/net/vhost/rte_eth_vhost.c
> b/drivers/net/vhost/rte_eth_vhost.c
> index 05940f2461..af023c7639 100644
> --- a/drivers/net/vhost/rte_eth_vhost.c
> +++ b/drivers/net/vhost/rte_eth_vhost.c
> @@ -1480,12 +1480,50 @@ vhost_dev_priv_dump(struct rte_eth_dev *dev,
> FILE *f)
> return 0;
> }
>
> +static void
> +eth_rxq_info_get(struct rte_eth_dev *dev, uint16_t rx_queue_id,
> + struct rte_eth_rxq_info *qinfo)
> +{
> + struct rte_vhost_vring vring;
> + struct vhost_queue *vq = dev->data->rx_queues[rx_queue_id];
> +
> + qinfo->nb_desc = 0;
> +
> + if (vq == NULL || vq->vid < 0)
> + return;
> +
> + if (rte_vhost_get_vhost_vring(vq->vid, vq->virtqueue_id, &vring) < 0)
> + return;
> +
> + qinfo->nb_desc = vring.size;
> +}
> +
> +static void
> +eth_txq_info_get(struct rte_eth_dev *dev, uint16_t tx_queue_id,
> + struct rte_eth_txq_info *qinfo)
> +{
> + struct rte_vhost_vring vring;
> + struct vhost_queue *vq = dev->data->tx_queues[tx_queue_id];
> +
> + qinfo->nb_desc = 0;
> +
> + if (vq == NULL || vq->vid < 0)
> + return;
> +
> + if (rte_vhost_get_vhost_vring(vq->vid, vq->virtqueue_id, &vring) < 0)
> + return;
> +
> + qinfo->nb_desc = vring.size;
> +}
> +
> static const struct eth_dev_ops ops = {
> .dev_start = eth_dev_start,
> .dev_stop = eth_dev_stop,
> .dev_close = eth_dev_close,
> .dev_configure = eth_dev_configure,
> .dev_infos_get = eth_dev_info,
> + .rxq_info_get = eth_rxq_info_get,
> + .txq_info_get = eth_txq_info_get,
> .rx_queue_setup = eth_rx_queue_setup,
> .tx_queue_setup = eth_tx_queue_setup,
> .rx_queue_release = eth_rx_queue_release,
> --
> 2.43.0
