NFP_NET_VF_CFG_VLAN
writel(vlan_tag, app->pf->vfcfg_tbl2 + vf_offset + NFP_NET_VF_CFG_VLAN);
vlan_tag = readl(app->pf->vfcfg_tbl2 + vf_offset + NFP_NET_VF_CFG_VLAN);