Currently, there are no ways to retrieve the queue size set by vhost backend. Implement the {rxq,txq}_info_get callbacks so that DPDK applications can use the queue size to setup mempool properly.
Signed-off-by: Hengqi Chen <hengqi.c...@gmail.com> --- drivers/net/virtio/virtio_ethdev.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c index 2d2635b669..b61d251814 100644 --- a/drivers/net/virtio/virtio_ethdev.c +++ b/drivers/net/virtio/virtio_ethdev.c @@ -616,6 +616,28 @@ virtio_dev_priv_dump(struct rte_eth_dev *dev, FILE *f) return 0; } +static void +virtio_rxq_info_get(struct rte_eth_dev *dev, uint16_t rx_queue_id, + struct rte_eth_rxq_info *qinfo) +{ + uint16_t vq_idx = 2 * rx_queue_id + VTNET_SQ_RQ_QUEUE_IDX; + struct virtio_hw *hw = dev->data->dev_private; + struct virtqueue *vq = hw->vqs[vq_idx]; + + qinfo->nb_desc = vq->vq_nentries; +} + +static void +virtio_txq_info_get(struct rte_eth_dev *dev, uint16_t tx_queue_id, + struct rte_eth_txq_info *qinfo) +{ + uint16_t vq_idx = 2 * tx_queue_id + VTNET_SQ_TQ_QUEUE_IDX; + struct virtio_hw *hw = dev->data->dev_private; + struct virtqueue *vq = hw->vqs[vq_idx]; + + qinfo->nb_desc = vq->vq_nentries; +} + /* * dev_ops for virtio, bare necessities for basic operation */ @@ -630,6 +652,8 @@ static const struct eth_dev_ops virtio_eth_dev_ops = { .allmulticast_disable = virtio_dev_allmulticast_disable, .mtu_set = virtio_mtu_set, .dev_infos_get = virtio_dev_info_get, + .rxq_info_get = virtio_rxq_info_get, + .txq_info_get = virtio_txq_info_get, .stats_get = virtio_dev_stats_get, .xstats_get = virtio_dev_xstats_get, .xstats_get_names = virtio_dev_xstats_get_names, -- 2.43.5