ice: Add code to go from ICE_FWD_TO_VSI_LIST to ICE_FWD_TO_VSI

When a switch rule is initially created we set the filter action to
ICE_FWD_TO_VSI. The filter action changes to ICE_FWD_TO_VSI_LIST
whenever more than one VSI is subscribed to the same switch rule. When
the switch rule goes from 2 VSIs in the list to 1 VSI we remove and
delete the VSI list rule, but we currently don't update the switch rule
in hardware. This is causing switch rules to be lost, so fix that by
making a call to ice_update_pkt_fwd_rule() with the necessary changes.

Signed-off-by: Brett Creeley <brett.creeley@intel.com>
Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/ice/ice_switch.c

@@ -1422,8 +1422,8 @@ ice_rem_update_vsi_list(struct ice_hw *hw, u16 vsi_handle,
 	fm_list->vsi_count--;
 	clear_bit(vsi_handle, fm_list->vsi_list_info->vsi_map);
 
-	if ((fm_list->vsi_count == 1 && lkup_type != ICE_SW_LKUP_VLAN) ||
-	    (fm_list->vsi_count == 0 && lkup_type == ICE_SW_LKUP_VLAN)) {
+	if (fm_list->vsi_count == 1 && lkup_type != ICE_SW_LKUP_VLAN) {
+		struct ice_fltr_info tmp_fltr_info = fm_list->fltr_info;
 		struct ice_vsi_list_map_info *vsi_list_info =
 			fm_list->vsi_list_info;
 		u16 rem_vsi_handle;
@@ -1432,6 +1432,8 @@ ice_rem_update_vsi_list(struct ice_hw *hw, u16 vsi_handle,
 						ICE_MAX_VSI);
 		if (!ice_is_vsi_valid(hw, rem_vsi_handle))
 			return ICE_ERR_OUT_OF_RANGE;
+
+		/* Make sure VSI list is empty before removing it below */
 		status = ice_update_vsi_list_rule(hw, &rem_vsi_handle, 1,
 						  vsi_list_id, true,
 						  ice_aqc_opc_update_sw_rules,
@@ -1439,16 +1441,34 @@ ice_rem_update_vsi_list(struct ice_hw *hw, u16 vsi_handle,
 		if (status)
 			return status;
 
+		tmp_fltr_info.fltr_act = ICE_FWD_TO_VSI;
+		tmp_fltr_info.fwd_id.hw_vsi_id =
+			ice_get_hw_vsi_num(hw, rem_vsi_handle);
+		tmp_fltr_info.vsi_handle = rem_vsi_handle;
+		status = ice_update_pkt_fwd_rule(hw, &tmp_fltr_info);
+		if (status) {
+			ice_debug(hw, ICE_DBG_SW,
+				  "Failed to update pkt fwd rule to FWD_TO_VSI on HW VSI %d, error %d\n",
+				  tmp_fltr_info.fwd_id.hw_vsi_id, status);
+			return status;
+		}
+
+		fm_list->fltr_info = tmp_fltr_info;
+	}
+
+	if ((fm_list->vsi_count == 1 && lkup_type != ICE_SW_LKUP_VLAN) ||
+	    (fm_list->vsi_count == 0 && lkup_type == ICE_SW_LKUP_VLAN)) {
+		struct ice_vsi_list_map_info *vsi_list_info =
+			fm_list->vsi_list_info;
+
 		/* Remove the VSI list since it is no longer used */
 		status = ice_remove_vsi_list_rule(hw, vsi_list_id, lkup_type);
-		if (status)
+		if (status) {
+			ice_debug(hw, ICE_DBG_SW,
+				  "Failed to remove VSI list %d, error %d\n",
+				  vsi_list_id, status);
 			return status;
-
-		/* Change the list entry action from VSI_LIST to VSI */
-		fm_list->fltr_info.fltr_act = ICE_FWD_TO_VSI;
-		fm_list->fltr_info.fwd_id.hw_vsi_id =
-			ice_get_hw_vsi_num(hw, rem_vsi_handle);
-		fm_list->fltr_info.vsi_handle = rem_vsi_handle;
+		}
 
 		list_del(&vsi_list_info->list_entry);
 		devm_kfree(ice_hw_to_dev(hw), vsi_list_info);