[PATCH] net/iavf: fix Tx preparation

[Yang, Qiming]

Hi,

> -----Original Message-----
> From: Qi Zhang <qi.z.zhang at intel.com>
> Sent: Thursday, November 2, 2023 8:05 PM
> To: Xing, Beilei <beilei.xing at intel.com>
> Cc: dev at dpdk.org; Zhang, Qi Z <qi.z.zhang at intel.com>; stable at dpdk.org
> Subject: [PATCH] net/iavf: fix Tx preparation
>
> 1. check nb_segs > Tx ring size for TSO case.
> 2. report nb_mtu_seg_max and nb_seg_max in dev_info.
>
> Fixes: a2b29a7733ef ("net/avf: enable basic Rx Tx")
> Cc: stable at dpdk.org
>
> Signed-off-by: Qi Zhang <qi.z.zhang at intel.com>
> ---
>  drivers/net/iavf/iavf_ethdev.c | 2 ++
>  drivers/net/iavf/iavf_rxtx.c   | 3 ++-
>  2 files changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/iavf/iavf_ethdev.c b/drivers/net/iavf/iavf_ethdev.c
> index 98cc5c8ea8..0c6ab4ac5a 100644
> --- a/drivers/net/iavf/iavf_ethdev.c
> +++ b/drivers/net/iavf/iavf_ethdev.c
> @@ -1207,6 +1207,8 @@ iavf_dev_info_get(struct rte_eth_dev *dev, struct
> rte_eth_dev_info *dev_info)
>               .nb_max = IAVF_MAX_RING_DESC,
>               .nb_min = IAVF_MIN_RING_DESC,
>               .nb_align = IAVF_ALIGN_RING_DESC,
> +             .nb_mtu_seg_max = IAVF_TX_MAX_MTU_SEG,
> +             .nb_seg_max = IAVF_MAX_RING_DESC,
>       };
>
>       dev_info->err_handle_mode =
> RTE_ETH_ERROR_HANDLE_MODE_PASSIVE;
> diff --git a/drivers/net/iavf/iavf_rxtx.c b/drivers/net/iavf/iavf_rxtx.c index
> 610912f635..45f638c1d2 100644
> --- a/drivers/net/iavf/iavf_rxtx.c
> +++ b/drivers/net/iavf/iavf_rxtx.c
> @@ -3656,7 +3656,8 @@ iavf_prep_pkts(__rte_unused void *tx_queue,
> struct rte_mbuf **tx_pkts,
>                               return i;
>                       }
>               } else if ((m->tso_segsz < IAVF_MIN_TSO_MSS) ||
> -                        (m->tso_segsz > IAVF_MAX_TSO_MSS)) {
> +                        (m->tso_segsz > IAVF_MAX_TSO_MSS) ||
> +                        (m->nb_segs > txq->nb_tx_desc)) {
>                       /* MSS outside the range are considered malicious */
>                       rte_errno = EINVAL;
>                       return i;
> --
> 2.31.1

Acked-by: Qiming Yang <qiming.yang at intel.com>