[dpdk-dev] [PATCH v2 9/9] net/mlx5: add drop action to Direct Verbs E-Switch

[Yongseok Koh]

On Thu, Apr 18, 2019 at 11:28:50AM +0000, Ori Kam wrote:
> This commit adds support for drop action when creating E-Switch flow
> using DV.
> 
> Signed-off-by: Ori Kam <orika at mellanox.com>
> ---
> v2:
> * Address ML comments.
> ---
>  drivers/net/mlx5/mlx5.c         |  9 +++++++++
>  drivers/net/mlx5/mlx5.h         |  1 +
>  drivers/net/mlx5/mlx5_flow_dv.c | 23 ++++++++++++++++-------
>  drivers/net/mlx5/mlx5_glue.c    | 12 ++++++++++++
>  drivers/net/mlx5/mlx5_glue.h    |  1 +
>  5 files changed, 39 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/net/mlx5/mlx5.c b/drivers/net/mlx5/mlx5.c
> index ff24e1d..65c69af 100644
> --- a/drivers/net/mlx5/mlx5.c
> +++ b/drivers/net/mlx5/mlx5.c
> @@ -357,6 +357,7 @@ struct mlx5_dev_spawn_data {
>  			goto error;
>  		}
>  		sh->fdb_ns = ns;
> +		sh->esw_drop_action = mlx5_glue->dr_create_flow_action_drop();
>  	}
>  #endif
>  	sh->dv_refcnt++;
> @@ -377,6 +378,10 @@ struct mlx5_dev_spawn_data {
>  		mlx5_glue->dr_destroy_ns(sh->fdb_ns);
>  		sh->fdb_ns = NULL;
>  	}
> +	if (sh->esw_drop_action) {
> +		mlx5_glue->destroy_flow_action(sh->esw_drop_action);
> +		sh->esw_drop_action = NULL;
> +	}
>  	return err;
>  #else
>  	(void)priv;
> @@ -417,6 +422,10 @@ struct mlx5_dev_spawn_data {
>  		mlx5_glue->dr_destroy_ns(sh->fdb_ns);
>  		sh->fdb_ns = NULL;
>  	}
> +	if (sh->esw_drop_action) {
> +		mlx5_glue->destroy_flow_action(sh->esw_drop_action);
> +		sh->esw_drop_action = NULL;
> +	}
>  #endif
>  	pthread_mutex_destroy(&sh->dv_mutex);
>  #else
> diff --git a/drivers/net/mlx5/mlx5.h b/drivers/net/mlx5/mlx5.h
> index 4b6dbc2..a736d57 100644
> --- a/drivers/net/mlx5/mlx5.h
> +++ b/drivers/net/mlx5/mlx5.h
> @@ -275,6 +275,7 @@ struct mlx5_ibv_shared {
>  	/* RX Direct Rules tables. */
>  	void *tx_ns; /* TX Direct Rules name space handle. */
>  	struct mlx5_flow_tbl_resource tx_tbl[MLX5_MAX_TABLES];
> +	void *esw_drop_action; /* Pointer to DR E-Switch drop action. */
>  	/* TX Direct Rules tables/ */
>  	LIST_HEAD(matchers, mlx5_flow_dv_matcher) matchers;
>  	LIST_HEAD(encap_decap, mlx5_flow_dv_encap_decap_resource) encaps_decaps;
> diff --git a/drivers/net/mlx5/mlx5_flow_dv.c b/drivers/net/mlx5/mlx5_flow_dv.c
> index 5997182..5ec8caf 100644
> --- a/drivers/net/mlx5/mlx5_flow_dv.c
> +++ b/drivers/net/mlx5/mlx5_flow_dv.c
> @@ -4049,6 +4049,7 @@ struct field_modify_info modify_tcp[] = {
>  {
>  	struct mlx5_flow_dv *dv;
>  	struct mlx5_flow *dev_flow;
> +	struct mlx5_priv *priv = dev->data->dev_private;
>  	int n;
>  	int err;
>  
> @@ -4056,13 +4057,21 @@ struct field_modify_info modify_tcp[] = {
>  		dv = &dev_flow->dv;
>  		n = dv->actions_n;
>  		if (flow->actions & MLX5_FLOW_ACTION_DROP) {
> -			dv->hrxq = mlx5_hrxq_drop_new(dev);
> -			if (!dv->hrxq) {
> -				rte_flow_error_set
> -					(error, errno,
> -					 RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
> -					 "cannot get drop hash queue");
> -				goto error;
> +			if (flow->transfer)
> +				dv->actions[n++] = priv->sh->esw_drop_action;
> +			else {
> +				dv->hrxq = mlx5_hrxq_drop_new(dev);
> +				if (!dv->hrxq) {
> +					rte_flow_error_set
> +						(error, errno,
> +						 RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
> +						 NULL,
> +						 "cannot get drop hash queue");
> +					goto error;
> +				}
> +				dv->actions[n++] =
> +					mlx5_glue->dv_create_flow_action_dest_ibv_qp
> +					(dv->hrxq->qp);

Looks like a bug when rebasing it.
dv->actions[] is set twice. You should remove this line and move the below one
to this place. Right?

Thanks,
Yongseok

>  			}
>  			dv->actions[n++] = dv->hrxq->action;
>  		} else if (flow->actions &
> diff --git a/drivers/net/mlx5/mlx5_glue.c b/drivers/net/mlx5/mlx5_glue.c
> index 117190f..b32cd09c 100644
> --- a/drivers/net/mlx5/mlx5_glue.c
> +++ b/drivers/net/mlx5/mlx5_glue.c
> @@ -394,6 +394,16 @@
>  }
>  
>  static void *
> +mlx5_glue_dr_create_flow_action_drop(void)
> +{
> +#ifdef HAVE_MLX5DV_DR_ESWITCH
> +	return mlx5dv_dr_create_action_drop();
> +#else
> +	return NULL;
> +#endif
> +}
> +
> +static void *
>  mlx5_glue_dr_create_flow_tbl(void *ns, uint32_t level)
>  {
>  #ifdef HAVE_MLX5DV_DR
> @@ -861,6 +871,8 @@
>  		mlx5_glue_dr_create_flow_action_dest_flow_tbl,
>  	.dr_create_flow_action_dest_vport =
>  		mlx5_glue_dr_create_flow_action_dest_vport,
> +	.dr_create_flow_action_drop =
> +		mlx5_glue_dr_create_flow_action_drop,
>  	.dr_create_flow_tbl = mlx5_glue_dr_create_flow_tbl,
>  	.dr_destroy_flow_tbl = mlx5_glue_dr_destroy_flow_tbl,
>  	.dr_create_ns = mlx5_glue_dr_create_ns,
> diff --git a/drivers/net/mlx5/mlx5_glue.h b/drivers/net/mlx5/mlx5_glue.h
> index 26f5cb3..1d06583 100644
> --- a/drivers/net/mlx5/mlx5_glue.h
> +++ b/drivers/net/mlx5/mlx5_glue.h
> @@ -147,6 +147,7 @@ struct mlx5_glue {
>  	struct ibv_cq *(*cq_ex_to_cq)(struct ibv_cq_ex *cq);
>  	void *(*dr_create_flow_action_dest_flow_tbl)(void *tbl);
>  	void *(*dr_create_flow_action_dest_vport)(void *ns, uint32_t vport);
> +	void *(*dr_create_flow_action_drop)();
>  	void *(*dr_create_flow_tbl)(void *ns, uint32_t level);
>  	int (*dr_destroy_flow_tbl)(void *tbl);
>  	void *(*dr_create_ns)(struct ibv_context *ctx,
> -- 
> 1.8.3.1
>