net/mlx5: E-Switch, Add API to configure rules for the offloaded mode

This allows for upper levels in the driver, e.g the TC offload code to add
e-switch offloaded steering rules. The caller provides the rule spec for
matching, action, source and destination vports.

Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
index 035e536..c0b0560 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
@@ -222,6 +222,12 @@ int mlx5_eswitch_get_vport_stats(struct mlx5_eswitch *esw,
                                 int vport,
                                 struct ifla_vf_stats *vf_stats);
 
+struct mlx5_flow_spec;
+
+struct mlx5_flow_rule *
+mlx5_eswitch_add_offloaded_rule(struct mlx5_eswitch *esw,
+                               struct mlx5_flow_spec *spec,
+                               u32 action, u32 src_vport, u32 dst_vport);
 struct mlx5_flow_rule *
 mlx5_eswitch_create_vport_rx_rule(struct mlx5_eswitch *esw, int vport, u32 tirn);
 

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
index 27122c0..a357e8e 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
@@ -43,6 +43,49 @@ enum {
        FDB_SLOW_PATH
 };
 
+struct mlx5_flow_rule *
+mlx5_eswitch_add_offloaded_rule(struct mlx5_eswitch *esw,
+                               struct mlx5_flow_spec *spec,
+                               u32 action, u32 src_vport, u32 dst_vport)
+{
+       struct mlx5_flow_destination dest = { 0 };
+       struct mlx5_fc *counter = NULL;
+       struct mlx5_flow_rule *rule;
+       void *misc;
+
+       if (esw->mode != SRIOV_OFFLOADS)
+               return ERR_PTR(-EOPNOTSUPP);
+
+       if (action & MLX5_FLOW_CONTEXT_ACTION_FWD_DEST) {
+               dest.type = MLX5_FLOW_DESTINATION_TYPE_VPORT;
+               dest.vport_num = dst_vport;
+               action = MLX5_FLOW_CONTEXT_ACTION_FWD_DEST;
+       } else if (action & MLX5_FLOW_CONTEXT_ACTION_COUNT) {
+               counter = mlx5_fc_create(esw->dev, true);
+               if (IS_ERR(counter))
+                       return ERR_CAST(counter);
+               dest.type = MLX5_FLOW_DESTINATION_TYPE_COUNTER;
+               dest.counter = counter;
+       }
+
+       misc = MLX5_ADDR_OF(fte_match_param, spec->match_value, misc_parameters);
+       MLX5_SET(fte_match_set_misc, misc, source_port, src_vport);
+
+       misc = MLX5_ADDR_OF(fte_match_param, spec->match_criteria, misc_parameters);
+       MLX5_SET_TO_ONES(fte_match_set_misc, misc, source_port);
+
+       spec->match_criteria_enable = MLX5_MATCH_OUTER_HEADERS |
+                                     MLX5_MATCH_MISC_PARAMETERS;
+
+       rule = mlx5_add_flow_rule((struct mlx5_flow_table *)esw->fdb_table.fdb,
+                                 spec, action, 0, &dest);
+
+       if (IS_ERR(rule))
+               mlx5_fc_destroy(esw->dev, counter);
+
+       return rule;
+}
+
 static struct mlx5_flow_rule *
 mlx5_eswitch_add_send_to_vport_rule(struct mlx5_eswitch *esw, int vport, u32 sqn)
 {