On Fri, Jan 09, 2026 at 03:21:30PM +0100, Robin Jarry wrote:
> With a regular iavf device, rte_eth_dev_info_get reports 256 maximum TX
> and RX queues. Trying to configure a port with 20 queues returns an
> error:
>
> ERR: IAVF_DRIVER: iavf_dev_configure(): large VF is not supported
>
> When the large VF feature isn't supported by the PF kernel driver,
> ethdev info must not report 256 supported queues but 16.
>
> Fixes: e436cd43835b ("net/iavf: negotiate large VF and request more queues")
> Cc: [email protected]
>
> Signed-off-by: Robin Jarry <[email protected]>
> ---
> drivers/net/intel/iavf/iavf_ethdev.c | 10 ++++++++--
> 1 file changed, 8 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/net/intel/iavf/iavf_ethdev.c
> b/drivers/net/intel/iavf/iavf_ethdev.c
> index 15e49fe24814..59328ebc5ad2 100644
> --- a/drivers/net/intel/iavf/iavf_ethdev.c
> +++ b/drivers/net/intel/iavf/iavf_ethdev.c
> @@ -1126,12 +1126,18 @@ iavf_dev_info_get(struct rte_eth_dev *dev, struct
> rte_eth_dev_info *dev_info)
> struct iavf_adapter *adapter =
> IAVF_DEV_PRIVATE_TO_ADAPTER(dev->data->dev_private);
> struct iavf_info *vf = &adapter->vf;
> + uint16_t max_queue_pairs;
>
> if (adapter->closed)
> return -EIO;
>
> - dev_info->max_rx_queues = IAVF_MAX_NUM_QUEUES_LV;
> - dev_info->max_tx_queues = IAVF_MAX_NUM_QUEUES_LV;
> + if (vf->vf_res->vf_cap_flags & VIRTCHNL_VF_LARGE_NUM_QPAIRS)
> + max_queue_pairs = IAVF_MAX_NUM_QUEUES_LV;
> + else
> + max_queue_pairs = IAVF_MAX_NUM_QUEUES_DFLT;
> +
> + dev_info->max_rx_queues = max_queue_pairs;
> + dev_info->max_tx_queues = max_queue_pairs;
> dev_info->min_rx_bufsize = IAVF_BUF_SIZE_MIN;
> dev_info->max_rx_pktlen = IAVF_FRAME_SIZE_MAX;
> dev_info->max_mtu = dev_info->max_rx_pktlen - IAVF_ETH_OVERHEAD;
> --
Makes sense.
Acked-by: Bruce Richardson <[email protected]>
