Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 03a9d11e authored by Or Gerlitz's avatar Or Gerlitz Committed by David S. Miller
Browse files

net/mlx5e: Add TC drop and mirred/redirect action parsing for SRIOV offloads 



Add the setup code that parses the TC actions needed to support offloading drop
and mirred/redirect for SRIOV e-switch. We can redirect between two devices if
they belong to the same HW switch, compare the switchdev HW ID attribute to
enforce that.

Signed-off-by: default avatarOr Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: default avatarSaeed Mahameed <saeedm@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 8438884d

drivers/net/ethernet/mellanox/mlx5/core/en_tc.c

+53 −0
Original line number Diff line number Diff line
@@ -37,8 +37,11 @@ 
#include <linux/mlx5/fs.h>

#include <linux/mlx5/device.h>

#include <linux/rhashtable.h>

#include <net/switchdev.h>

#include <net/tc_act/tc_mirred.h>

#include "en.h"

#include "en_tc.h"

#include "eswitch.h"



struct mlx5e_tc_flow {

	struct rhash_head	node;
@@ -339,6 +342,56 @@ static int parse_tc_nic_actions(struct mlx5e_priv *priv, struct tcf_exts *exts, 
	return 0;

}



static int parse_tc_fdb_actions(struct mlx5e_priv *priv, struct tcf_exts *exts,

				u32 *action, u32 *dest_vport)

{

	const struct tc_action *a;



	if (tc_no_actions(exts))

		return -EINVAL;



	*action = 0;



	tc_for_each_action(a, exts) {

		/* Only support a single action per rule */

		if (*action)

			return -EINVAL;



		if (is_tcf_gact_shot(a)) {

			*action = MLX5_FLOW_CONTEXT_ACTION_DROP |

				  MLX5_FLOW_CONTEXT_ACTION_COUNT;

			continue;

		}



		if (is_tcf_mirred_redirect(a)) {

			int ifindex = tcf_mirred_ifindex(a);

			struct net_device *out_dev;

			struct mlx5e_priv *out_priv;

			struct mlx5_eswitch_rep *out_rep;



			out_dev = __dev_get_by_index(dev_net(priv->netdev), ifindex);



			if (!switchdev_port_same_parent_id(priv->netdev, out_dev)) {

				pr_err("devices %s %s not on same switch HW, can't offload forwarding\n",

				       priv->netdev->name, out_dev->name);

				return -EINVAL;

			}



			out_priv = netdev_priv(out_dev);

			out_rep  = out_priv->ppriv;

			if (out_rep->vport == 0)

				*dest_vport = FDB_UPLINK_VPORT;

			else

				*dest_vport = out_rep->vport;

			*action = MLX5_FLOW_CONTEXT_ACTION_FWD_DEST;

			continue;

		}



		return -EINVAL;

	}

	return 0;

}



int mlx5e_configure_flower(struct mlx5e_priv *priv, __be16 protocol,

			   struct tc_cls_flower_offload *f)

{