[dpdk-dev] [PATCH v3 3/4] net/mlx5: add L2 and L3 encap to Direct Verbs flow

Yongseok Koh yskoh at mellanox.com
Wed Oct 10 02:43:18 CEST 2018


On Tue, Oct 09, 2018 at 10:25:36PM +0300, Dekel Peled wrote:
> This patch adds support for Direct Verbs encap operations, L2 and L3.
> 
> Signed-off-by: Dekel Peled <dekelp at mellanox.com>
> ---

Acked-by: Yongseok Koh <yskoh at mellanox.com>

Thanks

>  drivers/net/mlx5/mlx5_flow_dv.c | 227 +++++++++++++++++++++++++++++++++++++++-
>  1 file changed, 222 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/net/mlx5/mlx5_flow_dv.c b/drivers/net/mlx5/mlx5_flow_dv.c
> index 80e7b24..73a22ba 100644
> --- a/drivers/net/mlx5/mlx5_flow_dv.c
> +++ b/drivers/net/mlx5/mlx5_flow_dv.c
> @@ -84,6 +84,168 @@
>  }
>  
>  /**
> + * Validate the tunnel encap action.
> + *
> + * @param[in] action_flags
> + *   holds the actions detected until now.
> + * @param[in] action
> + *   Pointer to the encap action.
> + * @param[in] attr
> + *   Pointer to flow attributes
> + * @param[out] error
> + *   Pointer to error structure.
> + *
> + * @return
> + *   0 on success, a negative errno value otherwise and rte_ernno is set.
> + */
> +static int
> +flow_dv_validate_action_tunnel_encap(uint64_t action_flags,
> +				     const struct rte_flow_action *action,
> +				     const struct rte_flow_attr *attr,
> +				     struct rte_flow_error *error)
> +{
> +	const struct rte_flow_action_tunnel_encap *tunnel_encap = action->conf;
> +
> +	if (!tunnel_encap || !(tunnel_encap->buf))
> +		return rte_flow_error_set(error, EINVAL,
> +					  RTE_FLOW_ERROR_TYPE_ACTION, action,
> +					  "configuration cannot be null");
> +	if (action_flags & MLX5_FLOW_ACTION_DROP)
> +		return rte_flow_error_set(error, EINVAL,
> +					  RTE_FLOW_ERROR_TYPE_ACTION, NULL,
> +					  "can't drop and encap in same flow");
> +	if (action_flags & (MLX5_FLOW_ACTION_TUNNEL_ENCAP |
> +			    MLX5_FLOW_ACTION_TUNNEL_ENCAP_L3))
> +		return rte_flow_error_set(error, EINVAL,
> +					  RTE_FLOW_ERROR_TYPE_ACTION, NULL,
> +					  "can't have 2 encap actions in same"
> +					  " flow");
> +	if (attr->ingress)
> +		return rte_flow_error_set(error, ENOTSUP,
> +					  RTE_FLOW_ERROR_TYPE_ATTR_INGRESS,
> +					  NULL,
> +					  "encap action not supported for "
> +					  "ingress");
> +	return 0;
> +}
> +
> +/**
> + * Validate the tunnel encap L3 action
> + *
> + * @param[in] action_flags
> + *   holds the actions detected until now.
> + * @param[in] action
> + *   Pointer to the encap action.
> + * @param[in] attr
> + *   Pointer to flow attributes
> + * @param[out] error
> + *   Pointer to error structure.
> + *
> + * @return
> + *   0 on success, a negative errno value otherwise and rte_ernno is set.
> + */
> +static int
> +flow_dv_validate_action_tunnel_encap_l3(uint64_t action_flags,
> +					const struct rte_flow_action *action,
> +					const struct rte_flow_attr *attr,
> +					struct rte_flow_error *error)
> +{
> +	const struct rte_flow_action_tunnel_encap_l3 *tunnel_encap_l3 =
> +			action->conf;
> +
> +	if (!tunnel_encap_l3 || !(tunnel_encap_l3->buf))
> +		return rte_flow_error_set(error, EINVAL,
> +					  RTE_FLOW_ERROR_TYPE_ACTION, action,
> +					  "configuration cannot be null");
> +	if (action_flags & MLX5_FLOW_ACTION_DROP)
> +		return rte_flow_error_set(error, EINVAL,
> +					  RTE_FLOW_ERROR_TYPE_ACTION, NULL,
> +					  "can't drop and encap in same flow");
> +	if (action_flags & (MLX5_FLOW_ACTION_TUNNEL_ENCAP |
> +			    MLX5_FLOW_ACTION_TUNNEL_ENCAP_L3))
> +		return rte_flow_error_set(error, EINVAL,
> +					  RTE_FLOW_ERROR_TYPE_ACTION, NULL,
> +					  "can't have 2 encap actions in same"
> +					  " flow");
> +	if (attr->ingress)
> +		return rte_flow_error_set(error, ENOTSUP,
> +					  RTE_FLOW_ERROR_TYPE_ATTR_INGRESS,
> +					  NULL,
> +					  "encap action not supported for "
> +					  "ingress");
> +	return 0;
> +}
> +
> +/**
> + * Convert encap action to DV specification.
> + *
> + * @param[in] dev
> + *   Pointer to rte_eth_dev structure.
> + * @param[in] action
> + *   Pointer to action structure.
> + * @param[out] error
> + *   Pointer to the error structure.
> + *
> + * @return
> + *   Pointer to action on success, NULL otherwise and rte_errno is set.
> + */
> +static struct ibv_flow_action *
> +flow_dv_create_encap(struct rte_eth_dev *dev,
> +		     const struct rte_flow_action *action,
> +		     struct rte_flow_error *error)
> +{
> +	struct ibv_flow_action *encap_verb = NULL;
> +	const struct rte_flow_action_tunnel_encap *encap_data;
> +	struct priv *priv = dev->data->dev_private;
> +
> +	encap_data = (const struct rte_flow_action_tunnel_encap *)action->conf;
> +	encap_verb = mlx5_glue->dv_create_flow_action_packet_reformat
> +		(priv->ctx, encap_data->size,
> +		 encap_data->size ? encap_data->buf : NULL,
> +		 MLX5DV_FLOW_ACTION_PACKET_REFORMAT_TYPE_L2_TO_L2_TUNNEL,
> +		 MLX5DV_FLOW_TABLE_TYPE_NIC_TX);
> +	if (!encap_verb)
> +		rte_flow_error_set(error, EINVAL, RTE_FLOW_ERROR_TYPE_ACTION,
> +				   NULL, "cannot create encap action");
> +	return encap_verb;
> +}
> +
> +/**
> + * Convert encap L3 action to DV specification.
> + *
> + * @param[in] dev
> + *   Pointer to rte_eth_dev structure.
> + * @param[in] action
> + *   Pointer to action structure.
> + * @param[out] error
> + *   Pointer to the error structure.
> + *
> + * @return
> + *   Pointer to action on success, NULL otherwise and rte_errno is set.
> + */
> +static struct ibv_flow_action *
> +flow_dv_create_encap_l3(struct rte_eth_dev *dev,
> +			const struct rte_flow_action *action,
> +			struct rte_flow_error *error)
> +{
> +	struct ibv_flow_action *encap_l3_verb = NULL;
> +	const struct rte_flow_action_tunnel_encap_l3 *encap_l3_data;
> +	struct priv *priv = dev->data->dev_private;
> +
> +	encap_l3_data =
> +		(const struct rte_flow_action_tunnel_encap_l3 *)action->conf;
> +	encap_l3_verb = mlx5_glue->dv_create_flow_action_packet_reformat
> +		(priv->ctx, encap_l3_data->size,
> +		 encap_l3_data->size ? encap_l3_data->buf : NULL,
> +		 MLX5DV_FLOW_ACTION_PACKET_REFORMAT_TYPE_L2_TO_L3_TUNNEL,
> +		 MLX5DV_FLOW_TABLE_TYPE_NIC_TX);
> +	if (!encap_l3_verb)
> +		rte_flow_error_set(error, EINVAL, RTE_FLOW_ERROR_TYPE_ACTION,
> +				   NULL, "cannot create encap L3 action");
> +	return encap_l3_verb;
> +}
> +
> +/**
>   * Verify the @p attributes will be correctly understood by the NIC and store
>   * them in the @p flow if everything is correct.
>   *
> @@ -330,6 +492,20 @@
>  			action_flags |= MLX5_FLOW_ACTION_COUNT;
>  			++actions_n;
>  			break;
> +		case RTE_FLOW_ACTION_TYPE_TUNNEL_ENCAP:
> +			ret = flow_dv_validate_action_tunnel_encap
> +				(action_flags, actions, attr, error);
> +			if (ret < 0)
> +				return ret;
> +			action_flags |= MLX5_FLOW_ACTION_TUNNEL_ENCAP;
> +			break;
> +		case RTE_FLOW_ACTION_TYPE_TUNNEL_ENCAP_L3:
> +			ret = flow_dv_validate_action_tunnel_encap_l3
> +				(action_flags, actions, attr, error);
> +			if (ret < 0)
> +				return ret;
> +			action_flags |= MLX5_FLOW_ACTION_TUNNEL_ENCAP_L3;
> +			break;
>  		default:
>  			return rte_flow_error_set(error, ENOTSUP,
>  						  RTE_FLOW_ERROR_TYPE_ACTION,
> @@ -1038,14 +1214,23 @@
>  /**
>   * Store the requested actions in an array.
>   *
> + * @param[in] dev
> + *   Pointer to rte_eth_dev structure.
>   * @param[in] action
>   *   Flow action to translate.
>   * @param[in, out] dev_flow
>   *   Pointer to the mlx5_flow.
> + * @param[out] error
> + *   Pointer to the error structure.
> + *
> + * @return
> + *   0 on success, a negative errno value otherwise and rte_ernno is set.
>   */
> -static void
> -flow_dv_create_action(const struct rte_flow_action *action,
> -		      struct mlx5_flow *dev_flow)
> +static int
> +flow_dv_create_action(struct rte_eth_dev *dev,
> +		      const struct rte_flow_action *action,
> +		      struct mlx5_flow *dev_flow,
> +		      struct rte_flow_error *error)
>  {
>  	const struct rte_flow_action_queue *queue;
>  	const struct rte_flow_action_rss *rss;
> @@ -1092,10 +1277,35 @@
>  		/* Added to array only in apply since we need the QP */
>  		flow->actions |= MLX5_FLOW_ACTION_RSS;
>  		break;
> +	case RTE_FLOW_ACTION_TYPE_TUNNEL_ENCAP:
> +		dev_flow->dv.actions[actions_n].type =
> +			MLX5DV_FLOW_ACTION_IBV_FLOW_ACTION;
> +		dev_flow->dv.actions[actions_n].action =
> +			flow_dv_create_encap(dev, action, error);
> +		if (!(dev_flow->dv.actions[actions_n].action))
> +			return -rte_errno;
> +		dev_flow->dv.encap_verb =
> +			dev_flow->dv.actions[actions_n].action;
> +		flow->actions |= MLX5_FLOW_ACTION_TUNNEL_ENCAP;
> +		actions_n++;
> +		break;
> +	case RTE_FLOW_ACTION_TYPE_TUNNEL_ENCAP_L3:
> +		dev_flow->dv.actions[actions_n].type =
> +			MLX5DV_FLOW_ACTION_IBV_FLOW_ACTION;
> +		dev_flow->dv.actions[actions_n].action =
> +			flow_dv_create_encap_l3(dev, action, error);
> +		if (!(dev_flow->dv.actions[actions_n].action))
> +			return -rte_errno;
> +		dev_flow->dv.encap_verb =
> +			dev_flow->dv.actions[actions_n].action;
> +		flow->actions |= MLX5_FLOW_ACTION_TUNNEL_ENCAP_L3;
> +		actions_n++;
> +		break;
>  	default:
>  		break;
>  	}
>  	dev_flow->dv.actions_n = actions_n;
> +	return 0;
>  }
>  
>  static uint32_t matcher_zero[MLX5_ST_SZ_DW(fte_match_param)] = { 0 };
> @@ -1259,8 +1469,10 @@
>  	matcher.egress = attr->egress;
>  	if (flow_dv_matcher_register(dev, &matcher, dev_flow, error))
>  		return -rte_errno;
> -	for (; actions->type != RTE_FLOW_ACTION_TYPE_END; actions++)
> -		flow_dv_create_action(actions, dev_flow);
> +	for (; actions->type != RTE_FLOW_ACTION_TYPE_END; actions++) {
> +		if (flow_dv_create_action(dev, actions, dev_flow, error))
> +			return -rte_errno;
> +	}
>  	return 0;
>  }
>  
> @@ -1444,6 +1656,11 @@
>  		LIST_REMOVE(dev_flow, next);
>  		if (dev_flow->dv.matcher)
>  			flow_dv_matcher_release(dev, dev_flow->dv.matcher);
> +		if (dev_flow->dv.encap_verb) {
> +			claim_zero(mlx5_glue->destroy_flow_action
> +						(dev_flow->dv.encap_verb));
> +			dev_flow->dv.encap_verb = NULL;
> +		}
>  		rte_free(dev_flow);
>  	}
>  }
> -- 
> 1.8.3.1
> 


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