ice: refactor FC functions

Create a helper function for configuring requested flow control so that it
can be utilized by other functions looking to configure flow control
settings. Utilize the existing helper ice_copy_phy_caps_to_cfg() to copy a
PHY capability to configuration instead duplicating the code for it.
Signed-off-by: Paul Greenwalt <paul.greenwalt@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

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

@@ -2515,28 +2515,19 @@ enum ice_status ice_update_link_info(struct ice_port_info *pi)
 }
 
 /**
- * ice_set_fc
- * @pi: port information structure
- * @aq_failures: pointer to status code, specific to ice_set_fc routine
- * @ena_auto_link_update: enable automatic link update
- *
- * Set the requested flow control mode.
+ * ice_cfg_phy_fc - Configure PHY FC data based on FC mode
+ * @cfg: PHY configuration data to set FC mode
+ * @req_mode: FC mode to configure
  */
-enum ice_status
-ice_set_fc(struct ice_port_info *pi, u8 *aq_failures, bool ena_auto_link_update)
+static enum ice_status
+ice_cfg_phy_fc(struct ice_aqc_set_phy_cfg_data *cfg, enum ice_fc_mode req_mode)
 {
-	struct ice_aqc_set_phy_cfg_data cfg = { 0 };
-	struct ice_aqc_get_phy_caps_data *pcaps;
-	enum ice_status status;
 	u8 pause_mask = 0x0;
-	struct ice_hw *hw;
 
-	if (!pi)
-		return ICE_ERR_PARAM;
-	hw = pi->hw;
-	*aq_failures = ICE_SET_FC_AQ_FAIL_NONE;
+	if (!cfg)
+		return ICE_ERR_BAD_PTR;
 
-	switch (pi->fc.req_mode) {
+	switch (req_mode) {
 	case ICE_FC_FULL:
 		pause_mask |= ICE_AQC_PHY_EN_TX_LINK_PAUSE;
 		pause_mask |= ICE_AQC_PHY_EN_RX_LINK_PAUSE;
@@ -2551,6 +2542,38 @@ ice_set_fc(struct ice_port_info *pi, u8 *aq_failures, bool ena_auto_link_update)
 		break;
 	}
 
+	/* clear the old pause settings */
+	cfg->caps &= ~(ICE_AQC_PHY_EN_TX_LINK_PAUSE |
+		ICE_AQC_PHY_EN_RX_LINK_PAUSE);
+
+	/* set the new capabilities */
+	cfg->caps |= pause_mask;
+
+	return 0;
+}
+
+/**
+ * ice_set_fc
+ * @pi: port information structure
+ * @aq_failures: pointer to status code, specific to ice_set_fc routine
+ * @ena_auto_link_update: enable automatic link update
+ *
+ * Set the requested flow control mode.
+ */
+enum ice_status
+ice_set_fc(struct ice_port_info *pi, u8 *aq_failures, bool ena_auto_link_update)
+{
+	struct ice_aqc_set_phy_cfg_data  cfg = { 0 };
+	struct ice_aqc_get_phy_caps_data *pcaps;
+	enum ice_status status;
+	struct ice_hw *hw;
+
+	if (!pi)
+		return ICE_ERR_BAD_PTR;
+
+	*aq_failures = 0;
+	hw = pi->hw;
+
 	pcaps = devm_kzalloc(ice_hw_to_dev(hw), sizeof(*pcaps), GFP_KERNEL);
 	if (!pcaps)
 		return ICE_ERR_NO_MEMORY;
@@ -2563,12 +2586,12 @@ ice_set_fc(struct ice_port_info *pi, u8 *aq_failures, bool ena_auto_link_update)
 		goto out;
 	}
 
-	/* clear the old pause settings */
-	cfg.caps = pcaps->caps & ~(ICE_AQC_PHY_EN_TX_LINK_PAUSE |
-				   ICE_AQC_PHY_EN_RX_LINK_PAUSE);
+	ice_copy_phy_caps_to_cfg(pcaps, &cfg);
 
-	/* set the new capabilities */
-	cfg.caps |= pause_mask;
+	/* Configure the set PHY data */
+	status = ice_cfg_phy_fc(&cfg, pi->fc.req_mode);
+	if (status)
+		goto out;
 
 	/* If the capabilities have changed, then set the new config */
 	if (cfg.caps != pcaps->caps) {
@@ -2577,13 +2600,6 @@ ice_set_fc(struct ice_port_info *pi, u8 *aq_failures, bool ena_auto_link_update)
 		/* Auto restart link so settings take effect */
 		if (ena_auto_link_update)
 			cfg.caps |= ICE_AQ_PHY_ENA_AUTO_LINK_UPDT;
-		/* Copy over all the old settings */
-		cfg.phy_type_high = pcaps->phy_type_high;
-		cfg.phy_type_low = pcaps->phy_type_low;
-		cfg.low_power_ctrl = pcaps->low_power_ctrl;
-		cfg.eee_cap = pcaps->eee_cap;
-		cfg.eeer_value = pcaps->eeer_value;
-		cfg.link_fec_opt = pcaps->link_fec_options;
 
 		status = ice_aq_set_phy_cfg(hw, pi->lport, &cfg, NULL);
 		if (status) {
@@ -2629,6 +2645,7 @@ ice_copy_phy_caps_to_cfg(struct ice_aqc_get_phy_caps_data *caps,
 	if (!caps || !cfg)
 		return;
 
+	memset(cfg, 0, sizeof(*cfg));
 	cfg->phy_type_low = caps->phy_type_low;
 	cfg->phy_type_high = caps->phy_type_high;
 	cfg->caps = caps->caps;