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Commit 3aa33572 authored by Or Gerlitz's avatar Or Gerlitz Committed by David S. Miller
Browse files

net/mlx5: E-Switch, Add miss rule for offloads mode 



In the sriov offloads mode, packets that are not matched by any other
rule should be sent towards the e-switch manager for further processing.

Add such "miss" rule which matches ANY packet as the last rule in the
e-switch FDB and programs the HW to send the packet to vport 0 where
the e-switch manager runs.

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 69697b6e

drivers/net/ethernet/mellanox/mlx5/core/eswitch.h

+1 −0
Original line number Diff line number Diff line
@@ -144,6 +144,7 @@ struct mlx5_eswitch_fdb { 
		struct offloads_fdb {

			struct mlx5_flow_group *send_to_vport_grp;

			struct mlx5_flow_group *miss_grp;

			struct mlx5_flow_rule  *miss_rule;

		} offloads;

	};

};

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

+40 −0
Original line number Diff line number Diff line
@@ -38,6 +38,39 @@ 
#include "mlx5_core.h"

#include "eswitch.h"



static int esw_add_fdb_miss_rule(struct mlx5_eswitch *esw)

{

	struct mlx5_flow_destination dest;

	struct mlx5_flow_rule *flow_rule = NULL;

	u32 *match_v, *match_c;

	int err = 0;



	match_v = kzalloc(MLX5_ST_SZ_BYTES(fte_match_param), GFP_KERNEL);

	match_c = kzalloc(MLX5_ST_SZ_BYTES(fte_match_param), GFP_KERNEL);

	if (!match_v || !match_c) {

		esw_warn(esw->dev, "FDB: Failed to alloc match parameters\n");

		err = -ENOMEM;

		goto out;

	}



	dest.type = MLX5_FLOW_DESTINATION_TYPE_VPORT;

	dest.vport_num = 0;



	flow_rule = mlx5_add_flow_rule(esw->fdb_table.fdb, 0, match_c, match_v,

				       MLX5_FLOW_CONTEXT_ACTION_FWD_DEST, 0, &dest);

	if (IS_ERR(flow_rule)) {

		err = PTR_ERR(flow_rule);

		esw_warn(esw->dev,  "FDB: Failed to add miss flow rule err %d\n", err);

		goto out;

	}



	esw->fdb_table.offloads.miss_rule = flow_rule;

out:

	kfree(match_v);

	kfree(match_c);

	return err;

}



#define MAX_PF_SQ 256



int esw_create_offloads_fdb_table(struct mlx5_eswitch *esw, int nvports)
@@ -110,8 +143,14 @@ int esw_create_offloads_fdb_table(struct mlx5_eswitch *esw, int nvports) 
	}

	esw->fdb_table.offloads.miss_grp = g;



	err = esw_add_fdb_miss_rule(esw);

	if (err)

		goto miss_rule_err;



	return 0;



miss_rule_err:

	mlx5_destroy_flow_group(esw->fdb_table.offloads.miss_grp);

miss_err:

	mlx5_destroy_flow_group(esw->fdb_table.offloads.send_to_vport_grp);

send_vport_err:
@@ -128,6 +167,7 @@ void esw_destroy_offloads_fdb_table(struct mlx5_eswitch *esw) 
		return;



	esw_debug(esw->dev, "Destroy offloads FDB Table\n");

	mlx5_del_flow_rule(esw->fdb_table.offloads.miss_rule);

	mlx5_destroy_flow_group(esw->fdb_table.offloads.send_to_vport_grp);

	mlx5_destroy_flow_group(esw->fdb_table.offloads.miss_grp);