ice: Allow for delayed LLDP MIB change registration

Add an additional boolean parameter to the ice_init_dcb
function.  This boolean controls if the LLDP MIB change
events are registered for.  Also, add a new function
defined ice_cfg_lldp_mib_change.  The additional function
is necessary to be able to register for LLDP MIB change
events after calling ice_init_dcb.  The net effect of these
two changes is to allow a delayed registration for MIB change
events so that the driver is not accepting events before it
is ready for them.

Signed-off-by: Dave Ertman <david.m.ertman@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 35 insertions, 4 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_dcb.c b/drivers/net/ethernet/intel/ice/ice_dcb.c
index c5ee8d930611..dd7efff121bd 100644
--- a/drivers/net/ethernet/intel/ice/ice_dcb.c
+++ b/drivers/net/ethernet/intel/ice/ice_dcb.c
@@ -60,7 +60,7 @@ ice_aq_get_lldp_mib(struct ice_hw *hw, u8 bridge_type, u8 mib_type, void *buf,
  * Enable or Disable posting of an event on ARQ when LLDP MIB
  * associated with the interface changes (0x0A01)
  */
-enum ice_status
+static enum ice_status
 ice_aq_cfg_lldp_mib_change(struct ice_hw *hw, bool ena_update,
 			   struct ice_sq_cd *cd)
 {
@@ -943,10 +943,11 @@ enum ice_status ice_get_dcb_cfg(struct ice_port_info *pi)
 /**
  * ice_init_dcb
  * @hw: pointer to the HW struct
+ * @enable_mib_change: enable MIB change event
  *
  * Update DCB configuration from the Firmware
  */
-enum ice_status ice_init_dcb(struct ice_hw *hw)
+enum ice_status ice_init_dcb(struct ice_hw *hw, bool enable_mib_change)
 {
 	struct ice_port_info *pi = hw->port_info;
 	enum ice_status ret = 0;
@@ -972,9 +973,39 @@ enum ice_status ice_init_dcb(struct ice_hw *hw)
 	}
 
 	/* Configure the LLDP MIB change event */
-	ret = ice_aq_cfg_lldp_mib_change(hw, true, NULL);
+	if (enable_mib_change) {
+		ret = ice_aq_cfg_lldp_mib_change(hw, true, NULL);
+		if (!ret)
+			pi->is_sw_lldp = false;
+	}
+
+	return ret;
+}
+
+/**
+ * ice_cfg_lldp_mib_change
+ * @hw: pointer to the HW struct
+ * @ena_mib: enable/disable MIB change event
+ *
+ * Configure (disable/enable) MIB
+ */
+enum ice_status ice_cfg_lldp_mib_change(struct ice_hw *hw, bool ena_mib)
+{
+	struct ice_port_info *pi = hw->port_info;
+	enum ice_status ret;
+
+	if (!hw->func_caps.common_cap.dcb)
+		return ICE_ERR_NOT_SUPPORTED;
+
+	/* Get DCBX status */
+	pi->dcbx_status = ice_get_dcbx_status(hw);
+
+	if (pi->dcbx_status == ICE_DCBX_STATUS_DIS)
+		return ICE_ERR_NOT_READY;
+
+	ret = ice_aq_cfg_lldp_mib_change(hw, ena_mib, NULL);
 	if (!ret)
-		pi->is_sw_lldp = false;
+		pi->is_sw_lldp = !ena_mib;
 
 	return ret;
 }