[dpdk-dev] [PATCH 4/8] net/mlx5: add the validate sample action

[Jiawei(Jonny) Wang]

> -----Original Message-----
> From: Ori Kam <orika at mellanox.com>
> Sent: Wednesday, July 1, 2020 2:00 AM
> To: Jiawei(Jonny) Wang <jiaweiw at mellanox.com>; Slava Ovsiienko
> <viacheslavo at mellanox.com>; Matan Azrad <matan at mellanox.com>
> Cc: dev at dpdk.org; Thomas Monjalon <thomas at monjalon.net>; Raslan
> Darawsheh <rasland at mellanox.com>; ian.stokes at intel.com;
> fbl at redhat.com; Jiawei(Jonny) Wang <jiaweiw at mellanox.com>
> Subject: RE: [PATCH 4/8] net/mlx5: add the validate sample action
> 
> Hi Jiawei,
> 
> PSB.
> 
> Best,
> Ori
> 
> > -----Original Message-----
> > From: Jiawei Wang <jiaweiw at mellanox.com>
> > Sent: Thursday, June 25, 2020 7:26 PM
> > Subject: [PATCH 4/8] net/mlx5: add the validate sample action
> >
> > Add sample action validate function.
> >
> > For Sample flow support NIC-RX and FDB domain, must include an action
> > of a dest TIR in NIC_RX or DEFAULT_MISS in FDB.
> 
> What is the DEFAULT_MISS action?
> I think from reading the code that you mean that no action is allowed and it
> is always goes to e-switch manager / go to PF, am I correct?
> 
Yes, you're right,  For FDB, not addition action be allowed for sampling, the
default action is go to e-switch manager port.
The DEFAULT_MISS is rdma-core action that steering packet to default miss
of the steering domain, for FDB domain, it's e-switch manager port.

I'll update the commit log description.

Thanks.

> >
> > Only NIC_RX support with addition optinal actions.
> >
> > Signed-off-by: Jiawei Wang <jiaweiw at mellanox.com>
> > ---
> >  drivers/net/mlx5/linux/mlx5_os.c |  14 +++++
> >  drivers/net/mlx5/mlx5.h          |   1 +
> >  drivers/net/mlx5/mlx5_flow.h     |   1 +
> >  drivers/net/mlx5/mlx5_flow_dv.c  | 130
> > +++++++++++++++++++++++++++++++++++++++
> >  4 files changed, 146 insertions(+)
> >
> > diff --git a/drivers/net/mlx5/linux/mlx5_os.c
> > b/drivers/net/mlx5/linux/mlx5_os.c
> > index f0147e6..5c057d3 100644
> > --- a/drivers/net/mlx5/linux/mlx5_os.c
> > +++ b/drivers/net/mlx5/linux/mlx5_os.c
> > @@ -878,6 +878,20 @@
> >  			}
> >  		}
> >  #endif
> > +#if defined(HAVE_MLX5DV_DR) &&
> > defined(HAVE_MLX5_DR_CREATE_ACTION_FLOW_SAMPLE)
> > +		if (config.hca_attr.log_max_ft_sampler_num > 0  &&
> > +		    config.dv_flow_en) {
> > +			priv->sampler_en = 1;
> > +			DRV_LOG(DEBUG, "The Sampler enabled!\n");
> > +		} else {
> > +			priv->sampler_en = 0;
> > +			if (!config.hca_attr.log_max_ft_sampler_num)
> > +				DRV_LOG(WARNING, "No available register
> > for"
> > +						" Sampler.");
> > +			else
> > +				DRV_LOG(DEBUG, "DV flow is not
> > supported!\n");
> > +		}
> > +#endif
> >  	}
> >  	if (config.mprq.enabled && mprq) {
> >  		if (config.mprq.stride_num_n &&
> > diff --git a/drivers/net/mlx5/mlx5.h b/drivers/net/mlx5/mlx5.h index
> > 8a09ebc..c2a875c 100644
> > --- a/drivers/net/mlx5/mlx5.h
> > +++ b/drivers/net/mlx5/mlx5.h
> > @@ -607,6 +607,7 @@ struct mlx5_priv {
> >  	unsigned int counter_fallback:1; /* Use counter fallback management.
> > */
> >  	unsigned int mtr_en:1; /* Whether support meter. */
> >  	unsigned int mtr_reg_share:1; /* Whether support meter REG_C
> share.
> > */
> > +	unsigned int sampler_en:1; /* Whether support sampler. */
> >  	uint16_t domain_id; /* Switch domain identifier. */
> >  	uint16_t vport_id; /* Associated VF vport index (if any). */
> >  	uint32_t vport_meta_tag; /* Used for vport index match ove VF LAG.
> > */ diff --git a/drivers/net/mlx5/mlx5_flow.h
> > b/drivers/net/mlx5/mlx5_flow.h index 2c96677..902380b 100644
> > --- a/drivers/net/mlx5/mlx5_flow.h
> > +++ b/drivers/net/mlx5/mlx5_flow.h
> > @@ -200,6 +200,7 @@ enum mlx5_feature_name {  #define
> > MLX5_FLOW_ACTION_SET_IPV4_DSCP (1ull << 32)  #define
> > MLX5_FLOW_ACTION_SET_IPV6_DSCP (1ull << 33)  #define
> > MLX5_FLOW_ACTION_AGE (1ull << 34)
> > +#define MLX5_FLOW_ACTION_SAMPLE (1ull << 35)
> >
> >  #define MLX5_FLOW_FATE_ACTIONS \
> >  	(MLX5_FLOW_ACTION_DROP | MLX5_FLOW_ACTION_QUEUE | \ diff
> --git
> > a/drivers/net/mlx5/mlx5_flow_dv.c b/drivers/net/mlx5/mlx5_flow_dv.c
> > index f174009..710c0f3 100644
> > --- a/drivers/net/mlx5/mlx5_flow_dv.c
> > +++ b/drivers/net/mlx5/mlx5_flow_dv.c
> > @@ -3925,6 +3925,127 @@ struct field_modify_info modify_tcp[] = {  }
> >
> >  /**
> > + * Validate the sample action.
> > + *
> > + * @param[in] action_flags
> > + *   Holds the actions detected until now.
> > + * @param[in] action
> > + *   Pointer to the sample action.
> > + * @param[in] dev
> > + *   Pointer to the Ethernet device structure.
> > + * @param[in] attr
> > + *   Attributes of flow that includes this action.
> > + * @param[out] error
> > + *   Pointer to error structure.
> > + *
> > + * @return
> > + *   0 on success, a negative errno value otherwise and rte_errno is set.
> > + */
> > +static int
> > +flow_dv_validate_action_sample(uint64_t action_flags,
> > +			      const struct rte_flow_action *action,
> > +			      struct rte_eth_dev *dev,
> > +			      const struct rte_flow_attr *attr,
> > +			      struct rte_flow_error *error) {
> > +	struct mlx5_priv *priv = dev->data->dev_private;
> > +	struct mlx5_dev_config *dev_conf = &priv->config;
> > +	const struct rte_flow_action_sample *sample = action->conf;
> > +	const struct rte_flow_action *act = sample->actions;
> > +	uint64_t sub_action_flags = 0;
> > +	int actions_n = 0;
> > +	int ret;
> > +
> > +	if (!attr->group)
> > +		return rte_flow_error_set(error, ENOTSUP,
> > +
> > RTE_FLOW_ERROR_TYPE_ATTR_GROUP,
> > +					  NULL, "root table is not supported");
> > +	if (!priv->config.devx || !priv->sampler_en)
> > +		return rte_flow_error_set(error, ENOTSUP,
> > +
> > RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
> > +					  NULL,
> > +					  "sample action not supported");
> > +	if (!(action->conf))
> > +		return rte_flow_error_set(error, EINVAL,
> > +					  RTE_FLOW_ERROR_TYPE_ACTION,
> > action,
> > +					  "configuration cannot be null");
> > +	if (sample->ratio == 0)
> > +		return rte_flow_error_set(error, EINVAL,
> > +					  RTE_FLOW_ERROR_TYPE_ACTION,
> > action,
> > +					  "ratio value start from 1");
> > +	if (action_flags & MLX5_FLOW_ACTION_SAMPLE)
> > +		return rte_flow_error_set(error, EINVAL,
> > +					  RTE_FLOW_ERROR_TYPE_ACTION,
> > NULL,
> > +					  "Duplicate sample actions set");
> > +	if (action_flags & MLX5_FLOW_ACTION_METER)
> > +		return rte_flow_error_set(error, EINVAL,
> > +					  RTE_FLOW_ERROR_TYPE_ACTION,
> > action,
> > +					  "wrong action order, meter should "
> > +					  "be after sample action");
> > +	for (; act->type != RTE_FLOW_ACTION_TYPE_END; act++) {
> > +		if (actions_n == MLX5_DV_MAX_NUMBER_OF_ACTIONS)
> > +			return rte_flow_error_set(error, ENOTSUP,
> > +
> > RTE_FLOW_ERROR_TYPE_ACTION,
> > +						  act, "too many actions");
> > +		switch (act->type) {
> > +		case RTE_FLOW_ACTION_TYPE_QUEUE:
> > +			ret = mlx5_flow_validate_action_queue(act,
> > +							      sub_action_flags,
> > +							      dev,
> > +							      attr, error);
> > +			if (ret < 0)
> > +				return ret;
> > +			sub_action_flags |= MLX5_FLOW_ACTION_QUEUE;
> > +			break;
> > +		case RTE_FLOW_ACTION_TYPE_MARK:
> > +			ret = flow_dv_validate_action_mark(dev, act,
> > +							   sub_action_flags,
> > +							   attr, error);
> > +			if (ret < 0)
> > +				return ret;
> > +			if (dev_conf->dv_xmeta_en !=
> > MLX5_XMETA_MODE_LEGACY)
> > +				sub_action_flags |=
> > MLX5_FLOW_ACTION_MARK |
> > +
> > 	MLX5_FLOW_ACTION_MARK_EXT;
> > +			else
> > +				sub_action_flags |=
> > MLX5_FLOW_ACTION_MARK;
> > +			break;
> > +		case RTE_FLOW_ACTION_TYPE_COUNT:
> > +			ret = flow_dv_validate_action_count(dev, error);
> > +			if (ret < 0)
> > +				return ret;
> > +			sub_action_flags |= MLX5_FLOW_ACTION_COUNT;
> > +			break;
> > +		default:
> > +			return rte_flow_error_set(error, ENOTSUP,
> > +
> > RTE_FLOW_ERROR_TYPE_ACTION,
> > +						  NULL,
> > +						  "Doesn't support optional "
> > +						  "action");
> > +		}
> > +	}
> > +	if (attr->ingress && !attr->transfer) {
> > +		if (!(sub_action_flags & MLX5_FLOW_ACTION_QUEUE))
> > +			return rte_flow_error_set(error, EINVAL,
> > +
> > RTE_FLOW_ERROR_TYPE_ACTION,
> > +						  NULL,
> > +						  "Ingress must has a dest "
> > +						  "QUEUE for Sample");
> > +	} else if (attr->egress && !attr->transfer) {
> > +		return rte_flow_error_set(error, ENOTSUP,
> > +					  RTE_FLOW_ERROR_TYPE_ACTION,
> > +					  NULL,
> > +					  "Sample Only support Ingress "
> > +					  "or E-Switch");
> > +	} else if (sample->actions->type != RTE_FLOW_ACTION_TYPE_END) {
> > +		return rte_flow_error_set(error, ENOTSUP,
> > +					  RTE_FLOW_ERROR_TYPE_ACTION,
> > NULL,
> > +					  "E-Switch doesn't support any "
> > +					  "optinal action for sampling");
> > +	}
> > +	return 0;
> > +}
> > +
> > +/**
> >   * Find existing modify-header resource or create and register a new one.
> >   *
> >   * @param dev[in, out]
> > @@ -5539,6 +5660,15 @@ struct field_modify_info modify_tcp[] = {
> >  			action_flags |=
> MLX5_FLOW_ACTION_SET_IPV6_DSCP;
> >  			rw_act_num += MLX5_ACT_NUM_SET_DSCP;
> >  			break;
> > +		case RTE_FLOW_ACTION_TYPE_SAMPLE:
> > +			ret = flow_dv_validate_action_sample(action_flags,
> > +							     actions, dev,
> > +							     attr, error);
> > +			if (ret < 0)
> > +				return ret;
> > +			action_flags |= MLX5_FLOW_ACTION_SAMPLE;
> > +			++actions_n;
> > +			break;
> >  		default:
> >  			return rte_flow_error_set(error, ENOTSUP,
> >
> > RTE_FLOW_ERROR_TYPE_ACTION,
> > --
> > 1.8.3.1