Re: [dpdk-stable] [PATCH] net/bnxt: fix xstats by id

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

On Tue, Jun 16, 2020 at 8:36 AM Ferruh Yigit <ferruh.yigit@intel.com> wrote:
>
> The xstat by id device operation seems wrong, it fills 'xstats' struct
> via 'bnxt_dev_xstats_get_op()' call, but the retrieved values are not
> transferred to user input 'values' array.
>
> ethdev layer 'rte_eth_xstats_get_by_id()' &
> 'rte_eth_xstats_get_names_by_id' already provides "by id" support when
> device operations are missing.
> It is good for PMD to provide these device operations if it has a more
> performant way to get by id. But current implementation in PMD already
> does same thing with the ethdev APIs, so removing them provides same
> functionality.
>
> Fixes: 88920136688c ("net/bnxt: support xstats get by id")
> Cc: stable@dpdk.org
>
> Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>
Patch applied to dpdk-next-net-brcm. Thanks

> ---
>  drivers/net/bnxt/bnxt_ethdev.c |  2 -
>  drivers/net/bnxt/bnxt_stats.c  | 69 ----------------------------------
>  2 files changed, 71 deletions(-)
>
> diff --git a/drivers/net/bnxt/bnxt_ethdev.c b/drivers/net/bnxt/bnxt_ethdev.c
> index e8b4c058a1..0dcdb44adf 100644
> --- a/drivers/net/bnxt/bnxt_ethdev.c
> +++ b/drivers/net/bnxt/bnxt_ethdev.c
> @@ -4160,8 +4160,6 @@ static const struct eth_dev_ops bnxt_dev_ops = {
>         .txq_info_get = bnxt_txq_info_get_op,
>         .dev_led_on = bnxt_dev_led_on_op,
>         .dev_led_off = bnxt_dev_led_off_op,
> -       .xstats_get_by_id = bnxt_dev_xstats_get_by_id_op,
> -       .xstats_get_names_by_id = bnxt_dev_xstats_get_names_by_id_op,
>         .rx_queue_count = bnxt_rx_queue_count_op,
>         .rx_descriptor_status = bnxt_rx_descriptor_status_op,
>         .tx_descriptor_status = bnxt_tx_descriptor_status_op,
> diff --git a/drivers/net/bnxt/bnxt_stats.c b/drivers/net/bnxt/bnxt_stats.c
> index 8df6922f52..2b753cd1b8 100644
> --- a/drivers/net/bnxt/bnxt_stats.c
> +++ b/drivers/net/bnxt/bnxt_stats.c
> @@ -827,75 +827,6 @@ int bnxt_dev_xstats_reset_op(struct rte_eth_dev *eth_dev)
>         return ret;
>  }
>
> -int bnxt_dev_xstats_get_by_id_op(struct rte_eth_dev *dev, const uint64_t *ids,
> -               uint64_t *values, unsigned int limit)
> -{
> -       struct bnxt *bp = dev->data->dev_private;
> -       const unsigned int stat_cnt = RTE_DIM(bnxt_rx_stats_strings) +
> -                               RTE_DIM(bnxt_tx_stats_strings) +
> -                               RTE_DIM(bnxt_func_stats_strings) +
> -                               RTE_DIM(bnxt_rx_ext_stats_strings) +
> -                               RTE_DIM(bnxt_tx_ext_stats_strings) +
> -                               bnxt_flow_stats_cnt(bp);
> -       struct rte_eth_xstat xstats[stat_cnt];
> -       uint64_t values_copy[stat_cnt];
> -       uint16_t i;
> -       int rc;
> -
> -       rc = is_bnxt_in_error(bp);
> -       if (rc)
> -               return rc;
> -
> -       if (!ids)
> -               return bnxt_dev_xstats_get_op(dev, xstats, stat_cnt);
> -
> -       bnxt_dev_xstats_get_by_id_op(dev, NULL, values_copy, stat_cnt);
> -       for (i = 0; i < limit; i++) {
> -               if (ids[i] >= stat_cnt) {
> -                       PMD_DRV_LOG(ERR, "id value isn't valid");
> -                       return -EINVAL;
> -               }
> -               values[i] = values_copy[ids[i]];
> -       }
> -       return stat_cnt;
> -}
> -
> -int bnxt_dev_xstats_get_names_by_id_op(struct rte_eth_dev *dev,
> -                               struct rte_eth_xstat_name *xstats_names,
> -                               const uint64_t *ids, unsigned int limit)
> -{
> -       struct bnxt *bp = dev->data->dev_private;
> -       const unsigned int stat_cnt = RTE_DIM(bnxt_rx_stats_strings) +
> -                               RTE_DIM(bnxt_tx_stats_strings) +
> -                               RTE_DIM(bnxt_func_stats_strings) +
> -                               RTE_DIM(bnxt_rx_ext_stats_strings) +
> -                               RTE_DIM(bnxt_tx_ext_stats_strings) +
> -                               bnxt_flow_stats_cnt(bp);
> -       struct rte_eth_xstat_name xstats_names_copy[stat_cnt];
> -       uint16_t i;
> -       int rc;
> -
> -       rc = is_bnxt_in_error(bp);
> -       if (rc)
> -               return rc;
> -
> -       if (!ids)
> -               return bnxt_dev_xstats_get_names_op(dev, xstats_names,
> -                                                   stat_cnt);
> -       bnxt_dev_xstats_get_names_by_id_op(dev, xstats_names_copy, NULL,
> -                       stat_cnt);
> -
> -       for (i = 0; i < limit; i++) {
> -               if (ids[i] >= stat_cnt) {
> -                       PMD_DRV_LOG(ERR, "id value isn't valid");
> -                       return -EINVAL;
> -               }
> -               strcpy(xstats_names[i].name,
> -                               xstats_names_copy[ids[i]].name);
> -       }
> -       return stat_cnt;
> -}
> -
>  /* Update the input context memory with the flow counter IDs
>   * of the flows that we are interested in.
>   * Also, update the output tables with the current local values
> --
> 2.25.4
>