net/mlx5e: TC, add hw counter to branching actions

Currently a hw count action is appended to the last action of the action
list. However, a branching action may terminate the action list before
reaching the last action.

Append a count action to a branching action.
In the next patches, filters with branching actions will read this counter
when reporting stats per action.
Signed-off-by: Oz Shlomo <ozsh@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

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

@@ -3785,6 +3785,7 @@ mlx5e_clone_flow_attr_for_post_act(struct mlx5_flow_attr *attr,
 	INIT_LIST_HEAD(&attr2->list);
 	parse_attr->filter_dev = attr->parse_attr->filter_dev;
 	attr2->action = 0;
+	attr2->counter = NULL;
 	attr2->flags = 0;
 	attr2->parse_attr = parse_attr;
 	attr2->dest_chain = 0;
@@ -4084,6 +4085,10 @@ parse_branch_ctrl(struct flow_action_entry *act, struct mlx5e_tc_act *tc_act,
 		jump_state->jumping_attr = attr->branch_false;
 
 	jump_state->jump_count = jump_count;
+
+	/* branching action requires its own counter */
+	attr->action |= MLX5_FLOW_CONTEXT_ACTION_COUNT;
+
 	return 0;
 
 err_branch_false: