Re: [dpdk-dev] [PATCH v2 2/8] common/cnxk: flush smq

[Jerin Jacob <jerinjacobk@gmail.com>]

On Sat, Sep 18, 2021 at 8:02 PM <skoteshwar@marvell.com> wrote:
>
> From: Satha Rao <skoteshwar@marvell.com>
>
> Added new API to flush all SMQs related nix interface

nix-> NIX

Add more details in the commit log for meaning flush.

Change the subject to : common/cnxk: support SMQ flush

>
> Signed-off-by: Satha Rao <skoteshwar@marvell.com>
> ---
>  drivers/common/cnxk/hw/nix.h         |  6 +++++
>  drivers/common/cnxk/roc_nix.h        |  1 +
>  drivers/common/cnxk/roc_nix_tm_ops.c | 50 ++++++++++++++++++++++++++++++++++++
>  drivers/common/cnxk/version.map      |  1 +
>  4 files changed, 58 insertions(+)
>
> diff --git a/drivers/common/cnxk/hw/nix.h b/drivers/common/cnxk/hw/nix.h
> index a0ffd25..bc908c2 100644
> --- a/drivers/common/cnxk/hw/nix.h
> +++ b/drivers/common/cnxk/hw/nix.h
> @@ -2189,4 +2189,10 @@ struct nix_lso_format {
>  #define NIX_LSO_FORMAT_IDX_TSOV4 0
>  #define NIX_LSO_FORMAT_IDX_TSOV6 1
>
> +/* [CN10K, .) */
> +#define NIX_SENDSTATALG_MASK     0x7
> +#define NIX_SENDSTATALG_SEL_MASK  0x8
> +#define NIX_SENDSTAT_IOFFSET_MASK 0xFFF
> +#define NIX_SENDSTAT_OOFFSET_MASK 0xFFF
> +
>  #endif /* __NIX_HW_H__ */
> diff --git a/drivers/common/cnxk/roc_nix.h b/drivers/common/cnxk/roc_nix.h
> index b0e6fab..ac7bd7e 100644
> --- a/drivers/common/cnxk/roc_nix.h
> +++ b/drivers/common/cnxk/roc_nix.h
> @@ -468,6 +468,7 @@ int __roc_api roc_nix_tm_rsrc_count(struct roc_nix *roc_nix,
>  int __roc_api roc_nix_tm_node_name_get(struct roc_nix *roc_nix,
>                                        uint32_t node_id, char *buf,
>                                        size_t buflen);
> +int __roc_api roc_nix_smq_flush(struct roc_nix *roc_nix);
>
>  /* MAC */
>  int __roc_api roc_nix_mac_rxtx_start_stop(struct roc_nix *roc_nix, bool start);
> diff --git a/drivers/common/cnxk/roc_nix_tm_ops.c b/drivers/common/cnxk/roc_nix_tm_ops.c
> index ed244d4..d9741f5 100644
> --- a/drivers/common/cnxk/roc_nix_tm_ops.c
> +++ b/drivers/common/cnxk/roc_nix_tm_ops.c
> @@ -311,6 +311,56 @@
>  }
>
>  int
> +roc_nix_smq_flush(struct roc_nix *roc_nix)
> +{
> +       struct nix *nix = roc_nix_to_nix_priv(roc_nix);
> +       struct nix_tm_node_list *list;
> +       enum roc_nix_tm_tree tree;
> +       struct nix_tm_node *node;
> +       int rc = 0;
> +
> +       if (!(nix->tm_flags & NIX_TM_HIERARCHY_ENA))
> +               return 0;
> +
> +       tree = nix->tm_tree;
> +       list = nix_tm_node_list(nix, tree);
> +
> +       /* XOFF & Flush all SMQ's. HRM mandates
> +        * all SQ's empty before SMQ flush is issued.
> +        */
> +       TAILQ_FOREACH(node, list, node) {
> +               if (node->hw_lvl != NIX_TXSCH_LVL_SMQ)
> +                       continue;
> +               if (!(node->flags & NIX_TM_NODE_HWRES))
> +                       continue;
> +
> +               rc = nix_tm_smq_xoff(nix, node, true);
> +               if (rc) {
> +                       plt_err("Failed to enable smq %u, rc=%d", node->hw_id,
> +                               rc);
> +                       goto exit;
> +               }
> +       }
> +
> +       /* XON all SMQ's */
> +       TAILQ_FOREACH(node, list, node) {
> +               if (node->hw_lvl != NIX_TXSCH_LVL_SMQ)
> +                       continue;
> +               if (!(node->flags & NIX_TM_NODE_HWRES))
> +                       continue;
> +
> +               rc = nix_tm_smq_xoff(nix, node, false);
> +               if (rc) {
> +                       plt_err("Failed to enable smq %u, rc=%d", node->hw_id,
> +                               rc);
> +                       goto exit;
> +               }
> +       }
> +exit:
> +       return rc;
> +}
> +
> +int
>  roc_nix_tm_hierarchy_disable(struct roc_nix *roc_nix)
>  {
>         struct nix *nix = roc_nix_to_nix_priv(roc_nix);
> diff --git a/drivers/common/cnxk/version.map b/drivers/common/cnxk/version.map
> index 5df2e56..388f938 100644
> --- a/drivers/common/cnxk/version.map
> +++ b/drivers/common/cnxk/version.map
> @@ -170,6 +170,7 @@ INTERNAL {
>         roc_nix_xstats_names_get;
>         roc_nix_switch_hdr_set;
>         roc_nix_eeprom_info_get;
> +       roc_nix_smq_flush;
>         roc_nix_tm_dump;
>         roc_nix_tm_fini;
>         roc_nix_tm_free_resources;
> --
> 1.8.3.1
>