Re: [PATCH] net/bnxt: fix ring calculation for representors

[Ajit Khaparde <ajit.khaparde@broadcom.com>]

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On Tue, Feb 8, 2022 at 9:58 PM Ajit Khaparde <ajit.khaparde@broadcom.com> wrote:
>
> Currently the Tx and Rx ring count for representors is fixed.
> It does not consider the number of rings created for the parent
> function. And that can cause issues not only during initialization
> but while running traffic.
> Instead check the number of rings created for the parent function
> while configuring the ring resources for representors.
>
> Fixes: 322bd6e70272 ("net/bnxt: add port representor infrastructure")
> Cc: stable@dpdk.org
>
> Signed-off-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
> Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>
> Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Patch applied to dpdk-next-net-brcm.

> ---
>  drivers/net/bnxt/bnxt.h      |  2 +-
>  drivers/net/bnxt/bnxt_reps.c | 19 ++++++++++---------
>  2 files changed, 11 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/net/bnxt/bnxt.h b/drivers/net/bnxt/bnxt.h
> index 433f1c80be..0cbb58b2cf 100644
> --- a/drivers/net/bnxt/bnxt.h
> +++ b/drivers/net/bnxt/bnxt.h
> @@ -831,7 +831,7 @@ struct bnxt {
>         uint16_t                max_tx_rings;
>         uint16_t                max_rx_rings;
>  #define MAX_STINGRAY_RINGS             236U
> -#define BNXT_MAX_VF_REP_RINGS  8
> +#define BNXT_MAX_VF_REP_RINGS  8U
>
>         uint16_t                max_nq_rings;
>         uint16_t                max_l2_ctx;
> diff --git a/drivers/net/bnxt/bnxt_reps.c b/drivers/net/bnxt/bnxt_reps.c
> index 5e140f0cdb..9ae8848382 100644
> --- a/drivers/net/bnxt/bnxt_reps.c
> +++ b/drivers/net/bnxt/bnxt_reps.c
> @@ -548,7 +548,8 @@ int bnxt_rep_dev_info_get_op(struct rte_eth_dev *eth_dev,
>         dev_info->max_mac_addrs = parent_bp->max_l2_ctx;
>         dev_info->max_hash_mac_addrs = 0;
>
> -       max_rx_rings = BNXT_MAX_VF_REP_RINGS;
> +       max_rx_rings = RTE_MIN(parent_bp->rx_nr_rings, BNXT_MAX_VF_REP_RINGS);
> +
>         /* For the sake of symmetry, max_rx_queues = max_tx_queues */
>         dev_info->max_rx_queues = max_rx_rings;
>         dev_info->max_tx_queues = max_rx_rings;
> @@ -629,10 +630,10 @@ int bnxt_rep_rx_queue_setup_op(struct rte_eth_dev *eth_dev,
>         struct rte_mbuf **buf_ring;
>         int rc = 0;
>
> -       if (queue_idx >= BNXT_MAX_VF_REP_RINGS) {
> +       if (queue_idx >= rep_bp->rx_nr_rings) {
>                 PMD_DRV_LOG(ERR,
>                             "Cannot create Rx ring %d. %d rings available\n",
> -                           queue_idx, BNXT_MAX_VF_REP_RINGS);
> +                           queue_idx, rep_bp->rx_nr_rings);
>                 return -EINVAL;
>         }
>
> @@ -729,10 +730,10 @@ int bnxt_rep_tx_queue_setup_op(struct rte_eth_dev *eth_dev,
>         struct bnxt_tx_queue *parent_txq, *txq;
>         struct bnxt_vf_rep_tx_queue *vfr_txq;
>
> -       if (queue_idx >= BNXT_MAX_VF_REP_RINGS) {
> +       if (queue_idx >= rep_bp->rx_nr_rings) {
>                 PMD_DRV_LOG(ERR,
>                             "Cannot create Tx rings %d. %d rings available\n",
> -                           queue_idx, BNXT_MAX_VF_REP_RINGS);
> +                           queue_idx, rep_bp->rx_nr_rings);
>                 return -EINVAL;
>         }
>
> @@ -805,10 +806,10 @@ int bnxt_rep_stats_get_op(struct rte_eth_dev *eth_dev,
>                              struct rte_eth_stats *stats)
>  {
>         struct bnxt_representor *rep_bp = eth_dev->data->dev_private;
> -       int i;
> +       unsigned int i;
>
>         memset(stats, 0, sizeof(*stats));
> -       for (i = 0; i < BNXT_MAX_VF_REP_RINGS; i++) {
> +       for (i = 0; i < rep_bp->rx_nr_rings; i++) {
>                 stats->obytes += rep_bp->tx_bytes[i];
>                 stats->opackets += rep_bp->tx_pkts[i];
>                 stats->ibytes += rep_bp->rx_bytes[i];
> @@ -828,9 +829,9 @@ int bnxt_rep_stats_get_op(struct rte_eth_dev *eth_dev,
>  int bnxt_rep_stats_reset_op(struct rte_eth_dev *eth_dev)
>  {
>         struct bnxt_representor *rep_bp = eth_dev->data->dev_private;
> -       int i;
> +       unsigned int i;
>
> -       for (i = 0; i < BNXT_MAX_VF_REP_RINGS; i++) {
> +       for (i = 0; i < rep_bp->rx_nr_rings; i++) {
>                 rep_bp->tx_pkts[i] = 0;
>                 rep_bp->tx_bytes[i] = 0;
>                 rep_bp->rx_pkts[i] = 0;
> --
> 2.32.0 (Apple Git-132)
>

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