ice: implement bridge port vlan

Port VLAN in this case means push and pop VLAN action on specific vid.
There are a few limitation in hardware:
- push and pop can't be used separately
- if port VLAN is used there can't be any trunk VLANs, because pop
  action is done on all traffic received by VSI in port VLAN mode
- port VLAN mode on uplink port isn't supported

Reflect these limitations in code using dev_info to inform the user
about unsupported configuration.

In bridge mode there is a need to configure port vlan without resetting
VFs. To do that implement ice_port_vlan_on/off() functions. They are
only configuring correct vlan_ops to allow setting port vlan.

We also need to clear port vlan without resetting the VF which is not
supported right now. Change it by implementing clear_port_vlan ops.
As previous VLAN configuration isn't always the same, store current
config while creating port vlan and restore it in clear function.

Configuration steps:
- configure switchdev with bridge
- #bridge vlan add dev eth0 vid 120 pvid untagged
- #bridge vlan add dev eth1 vid 120 pvid untagged
- ping from VF0 to VF1

Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
Signed-off-by: Wojciech Drewek <wojciech.drewek@intel.com>
Tested-by: Sujai Buvaneswaran <sujai.buvaneswaran@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

1 files changed, 103 insertions, 83 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_vf_vsi_vlan_ops.c b/drivers/net/ethernet/intel/ice/ice_vf_vsi_vlan_ops.c
index b1ffb81893d4..d7b10dc67f03 100644
--- a/drivers/net/ethernet/intel/ice/ice_vf_vsi_vlan_ops.c
+++ b/drivers/net/ethernet/intel/ice/ice_vf_vsi_vlan_ops.c
@@ -21,6 +21,99 @@ noop_vlan(struct ice_vsi __always_unused *vsi)
 	return 0;
 }
 
+static void ice_port_vlan_on(struct ice_vsi *vsi)
+{
+	struct ice_vsi_vlan_ops *vlan_ops;
+	struct ice_pf *pf = vsi->back;
+
+	if (ice_is_dvm_ena(&pf->hw)) {
+		vlan_ops = &vsi->outer_vlan_ops;
+
+		/* setup outer VLAN ops */
+		vlan_ops->set_port_vlan = ice_vsi_set_outer_port_vlan;
+		vlan_ops->clear_port_vlan = ice_vsi_clear_outer_port_vlan;
+		vlan_ops->clear_port_vlan = ice_vsi_clear_outer_port_vlan;
+
+		/* setup inner VLAN ops */
+		vlan_ops = &vsi->inner_vlan_ops;
+		vlan_ops->add_vlan = noop_vlan_arg;
+		vlan_ops->del_vlan = noop_vlan_arg;
+		vlan_ops->ena_stripping = ice_vsi_ena_inner_stripping;
+		vlan_ops->dis_stripping = ice_vsi_dis_inner_stripping;
+		vlan_ops->ena_insertion = ice_vsi_ena_inner_insertion;
+		vlan_ops->dis_insertion = ice_vsi_dis_inner_insertion;
+	} else {
+		vlan_ops = &vsi->inner_vlan_ops;
+
+		vlan_ops->set_port_vlan = ice_vsi_set_inner_port_vlan;
+		vlan_ops->clear_port_vlan = ice_vsi_clear_inner_port_vlan;
+		vlan_ops->clear_port_vlan = ice_vsi_clear_inner_port_vlan;
+	}
+	vlan_ops->ena_rx_filtering = ice_vsi_ena_rx_vlan_filtering;
+}
+
+static void ice_port_vlan_off(struct ice_vsi *vsi)
+{
+	struct ice_vsi_vlan_ops *vlan_ops;
+	struct ice_pf *pf = vsi->back;
+
+	/* setup inner VLAN ops */
+	vlan_ops = &vsi->inner_vlan_ops;
+
+	vlan_ops->ena_stripping = ice_vsi_ena_inner_stripping;
+	vlan_ops->dis_stripping = ice_vsi_dis_inner_stripping;
+	vlan_ops->ena_insertion = ice_vsi_ena_inner_insertion;
+	vlan_ops->dis_insertion = ice_vsi_dis_inner_insertion;
+
+	if (ice_is_dvm_ena(&pf->hw)) {
+		vlan_ops = &vsi->outer_vlan_ops;
+
+		vlan_ops->del_vlan = ice_vsi_del_vlan;
+		vlan_ops->ena_stripping = ice_vsi_ena_outer_stripping;
+		vlan_ops->dis_stripping = ice_vsi_dis_outer_stripping;
+		vlan_ops->ena_insertion = ice_vsi_ena_outer_insertion;
+		vlan_ops->dis_insertion = ice_vsi_dis_outer_insertion;
+	} else {
+		vlan_ops->del_vlan = ice_vsi_del_vlan;
+	}
+
+	if (!test_bit(ICE_FLAG_VF_VLAN_PRUNING, pf->flags))
+		vlan_ops->ena_rx_filtering = noop_vlan;
+	else
+		vlan_ops->ena_rx_filtering =
+			ice_vsi_ena_rx_vlan_filtering;
+}
+
+/**
+ * ice_vf_vsi_enable_port_vlan - Set VSI VLAN ops to support port VLAN
+ * @vsi: VF's VSI being configured
+ *
+ * The function won't create port VLAN, it only allows to create port VLAN
+ * using VLAN ops on the VF VSI.
+ */
+void ice_vf_vsi_enable_port_vlan(struct ice_vsi *vsi)
+{
+	if (WARN_ON_ONCE(!vsi->vf))
+		return;
+
+	ice_port_vlan_on(vsi);
+}
+
+/**
+ * ice_vf_vsi_disable_port_vlan - Clear VSI support for creating port VLAN
+ * @vsi: VF's VSI being configured
+ *
+ * The function should be called after removing port VLAN on VSI
+ * (using VLAN ops)
+ */
+void ice_vf_vsi_disable_port_vlan(struct ice_vsi *vsi)
+{
+	if (WARN_ON_ONCE(!vsi->vf))
+		return;
+
+	ice_port_vlan_off(vsi);
+}
+
 /**
  * ice_vf_vsi_init_vlan_ops - Initialize default VSI VLAN ops for VF VSI
  * @vsi: VF's VSI being configured
@@ -39,91 +132,18 @@ void ice_vf_vsi_init_vlan_ops(struct ice_vsi *vsi)
 	if (WARN_ON(!vf))
 		return;
 
-	if (ice_is_dvm_ena(&pf->hw)) {
-		vlan_ops = &vsi->outer_vlan_ops;
+	if (ice_vf_is_port_vlan_ena(vf))
+		ice_port_vlan_on(vsi);
+	else
+		ice_port_vlan_off(vsi);
 
-		/* outer VLAN ops regardless of port VLAN config */
-		vlan_ops->add_vlan = ice_vsi_add_vlan;
-		vlan_ops->ena_tx_filtering = ice_vsi_ena_tx_vlan_filtering;
-		vlan_ops->dis_tx_filtering = ice_vsi_dis_tx_vlan_filtering;
-
-		if (ice_vf_is_port_vlan_ena(vf)) {
-			/* setup outer VLAN ops */
-			vlan_ops->set_port_vlan = ice_vsi_set_outer_port_vlan;
-			/* all Rx traffic should be in the domain of the
-			 * assigned port VLAN, so prevent disabling Rx VLAN
-			 * filtering
-			 */
-			vlan_ops->dis_rx_filtering = noop_vlan;
-			vlan_ops->ena_rx_filtering =
-				ice_vsi_ena_rx_vlan_filtering;
-
-			/* setup inner VLAN ops */
-			vlan_ops = &vsi->inner_vlan_ops;
-			vlan_ops->add_vlan = noop_vlan_arg;
-			vlan_ops->del_vlan = noop_vlan_arg;
-			vlan_ops->ena_stripping = ice_vsi_ena_inner_stripping;
-			vlan_ops->dis_stripping = ice_vsi_dis_inner_stripping;
-			vlan_ops->ena_insertion = ice_vsi_ena_inner_insertion;
-			vlan_ops->dis_insertion = ice_vsi_dis_inner_insertion;
-		} else {
-			vlan_ops->dis_rx_filtering =
-				ice_vsi_dis_rx_vlan_filtering;
-
-			if (!test_bit(ICE_FLAG_VF_VLAN_PRUNING, pf->flags))
-				vlan_ops->ena_rx_filtering = noop_vlan;
-			else
-				vlan_ops->ena_rx_filtering =
-					ice_vsi_ena_rx_vlan_filtering;
-
-			vlan_ops->del_vlan = ice_vsi_del_vlan;
-			vlan_ops->ena_stripping = ice_vsi_ena_outer_stripping;
-			vlan_ops->dis_stripping = ice_vsi_dis_outer_stripping;
-			vlan_ops->ena_insertion = ice_vsi_ena_outer_insertion;
-			vlan_ops->dis_insertion = ice_vsi_dis_outer_insertion;
-
-			/* setup inner VLAN ops */
-			vlan_ops = &vsi->inner_vlan_ops;
-
-			vlan_ops->ena_stripping = ice_vsi_ena_inner_stripping;
-			vlan_ops->dis_stripping = ice_vsi_dis_inner_stripping;
-			vlan_ops->ena_insertion = ice_vsi_ena_inner_insertion;
-			vlan_ops->dis_insertion = ice_vsi_dis_inner_insertion;
-		}
-	} else {
-		vlan_ops = &vsi->inner_vlan_ops;
+	vlan_ops = ice_is_dvm_ena(&pf->hw) ?
+		&vsi->outer_vlan_ops : &vsi->inner_vlan_ops;
 
-		/* inner VLAN ops regardless of port VLAN config */
-		vlan_ops->add_vlan = ice_vsi_add_vlan;
-		vlan_ops->dis_rx_filtering = ice_vsi_dis_rx_vlan_filtering;
-		vlan_ops->ena_tx_filtering = ice_vsi_ena_tx_vlan_filtering;
-		vlan_ops->dis_tx_filtering = ice_vsi_dis_tx_vlan_filtering;
-
-		if (ice_vf_is_port_vlan_ena(vf)) {
-			vlan_ops->set_port_vlan = ice_vsi_set_inner_port_vlan;
-			vlan_ops->ena_rx_filtering =
-				ice_vsi_ena_rx_vlan_filtering;
-			/* all Rx traffic should be in the domain of the
-			 * assigned port VLAN, so prevent disabling Rx VLAN
-			 * filtering
-			 */
-			vlan_ops->dis_rx_filtering = noop_vlan;
-		} else {
-			vlan_ops->dis_rx_filtering =
-				ice_vsi_dis_rx_vlan_filtering;
-			if (!test_bit(ICE_FLAG_VF_VLAN_PRUNING, pf->flags))
-				vlan_ops->ena_rx_filtering = noop_vlan;
-			else
-				vlan_ops->ena_rx_filtering =
-					ice_vsi_ena_rx_vlan_filtering;
-
-			vlan_ops->del_vlan = ice_vsi_del_vlan;
-			vlan_ops->ena_stripping = ice_vsi_ena_inner_stripping;
-			vlan_ops->dis_stripping = ice_vsi_dis_inner_stripping;
-			vlan_ops->ena_insertion = ice_vsi_ena_inner_insertion;
-			vlan_ops->dis_insertion = ice_vsi_dis_inner_insertion;
-		}
-	}
+	vlan_ops->add_vlan = ice_vsi_add_vlan;
+	vlan_ops->dis_rx_filtering = ice_vsi_dis_rx_vlan_filtering;
+	vlan_ops->ena_tx_filtering = ice_vsi_ena_tx_vlan_filtering;
+	vlan_ops->dis_tx_filtering = ice_vsi_dis_tx_vlan_filtering;
 }
 
 /**