ixgbe: cleanup PHY init

This change cleans up several situations in which we were either stepping
over possible errors, or calling initialization routines multiple times.
Also includes whitespace fixes where applicable.
Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com>
Tested-by: Stephen Ko <stephen.s.ko@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ixgbe/ixgbe_82598.c

@@ -280,10 +280,22 @@ static enum ixgbe_media_type ixgbe_get_media_type_82598(struct ixgbe_hw *hw)
 {
 	enum ixgbe_media_type media_type;
 
+	/* Detect if there is a copper PHY attached. */
+	switch (hw->phy.type) {
+	case ixgbe_phy_cu_unknown:
+	case ixgbe_phy_tn:
+	case ixgbe_phy_aq:
+		media_type = ixgbe_media_type_copper;
+		goto out;
+	default:
+		break;
+	}
+
 	/* Media type for I82598 is based on device ID */
 	switch (hw->device_id) {
 	case IXGBE_DEV_ID_82598:
 	case IXGBE_DEV_ID_82598_BX:
+		/* Default device ID is mezzanine card KX/KX4 */
 		media_type = ixgbe_media_type_backplane;
 		break;
 	case IXGBE_DEV_ID_82598AF_DUAL_PORT:
@@ -306,7 +318,7 @@ static enum ixgbe_media_type ixgbe_get_media_type_82598(struct ixgbe_hw *hw)
 		media_type = ixgbe_media_type_unknown;
 		break;
 	}
-
+out:
 	return media_type;
 }
 
@@ -632,7 +644,7 @@ static s32 ixgbe_check_mac_link_82598(struct ixgbe_hw *hw,
  *  @hw: pointer to hardware structure
  *  @speed: new link speed
  *  @autoneg: true if auto-negotiation enabled
- *  @autoneg_wait_to_complete: true if waiting is needed to complete
+ *  @autoneg_wait_to_complete: true when waiting for completion is needed
  *
  *  Set the link speed in the AUTOC register and restarts link.
  **/
@@ -671,7 +683,8 @@ static s32 ixgbe_setup_mac_link_82598(struct ixgbe_hw *hw,
 		 * ixgbe_hw This will write the AUTOC register based on the new
 		 * stored values
 		 */
-		status = ixgbe_start_mac_link_82598(hw, autoneg_wait_to_complete);
+		status = ixgbe_start_mac_link_82598(hw,
+						    autoneg_wait_to_complete);
 	}
 
 	return status;
@@ -1090,10 +1103,12 @@ static u32 ixgbe_get_supported_physical_layer_82598(struct ixgbe_hw *hw)
 
 	/* Copper PHY must be checked before AUTOC LMS to determine correct
 	 * physical layer because 10GBase-T PHYs use LMS = KX4/KX */
-	if (hw->phy.type == ixgbe_phy_tn ||
-	    hw->phy.type == ixgbe_phy_cu_unknown) {
-		hw->phy.ops.read_reg(hw, MDIO_PMA_EXTABLE, MDIO_MMD_PMAPMD,
-				     &ext_ability);
+	switch (hw->phy.type) {
+	case ixgbe_phy_tn:
+	case ixgbe_phy_aq:
+	case ixgbe_phy_cu_unknown:
+		hw->phy.ops.read_reg(hw, MDIO_PMA_EXTABLE,
+		MDIO_MMD_PMAPMD, &ext_ability);
 		if (ext_ability & MDIO_PMA_EXTABLE_10GBT)
 			physical_layer |= IXGBE_PHYSICAL_LAYER_10GBASE_T;
 		if (ext_ability & MDIO_PMA_EXTABLE_1000BT)
@@ -1101,6 +1116,8 @@ static u32 ixgbe_get_supported_physical_layer_82598(struct ixgbe_hw *hw)
 		if (ext_ability & MDIO_PMA_EXTABLE_100BTX)
 			physical_layer |= IXGBE_PHYSICAL_LAYER_100BASE_TX;
 		goto out;
+	default:
+		break;
 	}
 
 	switch (autoc & IXGBE_AUTOC_LMS_MASK) {

drivers/net/ixgbe/ixgbe_82599.c

@@ -470,8 +470,6 @@ static void ixgbe_enable_tx_laser_multispeed_fiber(struct ixgbe_hw *hw)
  **/
 static void ixgbe_flap_tx_laser_multispeed_fiber(struct ixgbe_hw *hw)
 {
-	hw_dbg(hw, "ixgbe_flap_tx_laser_multispeed_fiber\n");
-
 	if (hw->mac.autotry_restart) {
 		ixgbe_disable_tx_laser_multispeed_fiber(hw);
 		ixgbe_enable_tx_laser_multispeed_fiber(hw);
@@ -494,17 +492,21 @@ s32 ixgbe_setup_mac_link_multispeed_fiber(struct ixgbe_hw *hw,
                                           bool autoneg_wait_to_complete)
 {
 	s32 status = 0;
-	ixgbe_link_speed phy_link_speed;
+	ixgbe_link_speed link_speed = IXGBE_LINK_SPEED_UNKNOWN;
 	ixgbe_link_speed highest_link_speed = IXGBE_LINK_SPEED_UNKNOWN;
 	u32 speedcnt = 0;
 	u32 esdp_reg = IXGBE_READ_REG(hw, IXGBE_ESDP);
+	u32 i = 0;
 	bool link_up = false;
 	bool negotiation;
-	int i;
 
 	/* Mask off requested but non-supported speeds */
-	hw->mac.ops.get_link_capabilities(hw, &phy_link_speed, &negotiation);
-	speed &= phy_link_speed;
+	status = hw->mac.ops.get_link_capabilities(hw, &link_speed,
+						   &negotiation);
+	if (status != 0)
+		return status;
+
+	speed &= link_speed;
 
 	/*
 	 * Try each speed one by one, highest priority first.  We do this in
@@ -515,9 +517,12 @@ s32 ixgbe_setup_mac_link_multispeed_fiber(struct ixgbe_hw *hw,
 		highest_link_speed = IXGBE_LINK_SPEED_10GB_FULL;
 
 		/* If we already have link at this speed, just jump out */
-		hw->mac.ops.check_link(hw, &phy_link_speed, &link_up, false);
+		status = hw->mac.ops.check_link(hw, &link_speed, &link_up,
+						false);
+		if (status != 0)
+			return status;
 
-		if ((phy_link_speed == IXGBE_LINK_SPEED_10GB_FULL) && link_up)
+		if ((link_speed == IXGBE_LINK_SPEED_10GB_FULL) && link_up)
 			goto out;
 
 		/* Set the module link speed */
@@ -548,8 +553,11 @@ s32 ixgbe_setup_mac_link_multispeed_fiber(struct ixgbe_hw *hw,
 			msleep(100);
 
 			/* If we have link, just jump out */
-			hw->mac.ops.check_link(hw, &phy_link_speed,
+			status = hw->mac.ops.check_link(hw, &link_speed,
 							&link_up, false);
+			if (status != 0)
+				return status;
+
 			if (link_up)
 				goto out;
 		}
@@ -561,9 +569,12 @@ s32 ixgbe_setup_mac_link_multispeed_fiber(struct ixgbe_hw *hw,
 			highest_link_speed = IXGBE_LINK_SPEED_1GB_FULL;
 
 		/* If we already have link at this speed, just jump out */
-		hw->mac.ops.check_link(hw, &phy_link_speed, &link_up, false);
+		status = hw->mac.ops.check_link(hw, &link_speed, &link_up,
+						false);
+		if (status != 0)
+			return status;
 
-		if ((phy_link_speed == IXGBE_LINK_SPEED_1GB_FULL) && link_up)
+		if ((link_speed == IXGBE_LINK_SPEED_1GB_FULL) && link_up)
 			goto out;
 
 		/* Set the module link speed */
@@ -589,7 +600,11 @@ s32 ixgbe_setup_mac_link_multispeed_fiber(struct ixgbe_hw *hw,
 		msleep(100);
 
 		/* If we have link, just jump out */
-		hw->mac.ops.check_link(hw, &phy_link_speed, &link_up, false);
+		status = hw->mac.ops.check_link(hw, &link_speed, &link_up,
+						false);
+		if (status != 0)
+			return status;
+
 		if (link_up)
 			goto out;
 	}
@@ -632,13 +647,10 @@ static s32 ixgbe_setup_mac_link_smartspeed(struct ixgbe_hw *hw,
 				     bool autoneg_wait_to_complete)
 {
 	s32 status = 0;
-	ixgbe_link_speed link_speed;
+	ixgbe_link_speed link_speed = IXGBE_LINK_SPEED_UNKNOWN;
 	s32 i, j;
 	bool link_up = false;
 	u32 autoc_reg = IXGBE_READ_REG(hw, IXGBE_AUTOC);
-	struct ixgbe_adapter *adapter = hw->back;
-
-	hw_dbg(hw, "ixgbe_setup_mac_link_smartspeed.\n");
 
 	 /* Set autoneg_advertised value based on input link speed */
 	hw->phy.autoneg_advertised = 0;
@@ -664,7 +676,7 @@ static s32 ixgbe_setup_mac_link_smartspeed(struct ixgbe_hw *hw,
 	for (j = 0; j < IXGBE_SMARTSPEED_MAX_RETRIES; j++) {
 		status = ixgbe_setup_mac_link_82599(hw, speed, autoneg,
 						    autoneg_wait_to_complete);
-		if (status)
+		if (status != 0)
 			goto out;
 
 		/*
@@ -677,8 +689,11 @@ static s32 ixgbe_setup_mac_link_smartspeed(struct ixgbe_hw *hw,
 			mdelay(100);
 
 			/* If we have link, just jump out */
-			hw->mac.ops.check_link(hw, &link_speed,
+			status = hw->mac.ops.check_link(hw, &link_speed,
 							&link_up, false);
+			if (status != 0)
+				goto out;
+
 			if (link_up)
 				goto out;
 		}
@@ -696,7 +711,7 @@ static s32 ixgbe_setup_mac_link_smartspeed(struct ixgbe_hw *hw,
 	hw->phy.smart_speed_active = true;
 	status = ixgbe_setup_mac_link_82599(hw, speed, autoneg,
 					    autoneg_wait_to_complete);
-	if (status)
+	if (status != 0)
 		goto out;
 
 	/*
@@ -709,8 +724,11 @@ static s32 ixgbe_setup_mac_link_smartspeed(struct ixgbe_hw *hw,
 		mdelay(100);
 
 		/* If we have link, just jump out */
-		hw->mac.ops.check_link(hw, &link_speed,
+		status = hw->mac.ops.check_link(hw, &link_speed,
 						&link_up, false);
+		if (status != 0)
+			goto out;
+
 		if (link_up)
 			goto out;
 	}
@@ -722,7 +740,7 @@ static s32 ixgbe_setup_mac_link_smartspeed(struct ixgbe_hw *hw,
 
 out:
 	if (link_up && (link_speed == IXGBE_LINK_SPEED_1GB_FULL))
-		e_info(hw, "Smartspeed has downgraded the link speed from "
+		hw_dbg(hw, "Smartspeed has downgraded the link speed from "
 		       "the maximum advertised\n");
 	return status;
 }
@@ -883,7 +901,7 @@ static s32 ixgbe_reset_hw_82599(struct ixgbe_hw *hw)
 
 	/* PHY ops must be identified and initialized prior to reset */
 
-	/* Init PHY and function pointers, perform SFP setup */
+	/* Identify PHY and related function pointers */
 	status = hw->phy.ops.init(hw);
 
 	if (status == IXGBE_ERR_SFP_NOT_SUPPORTED)
@@ -895,6 +913,9 @@ static s32 ixgbe_reset_hw_82599(struct ixgbe_hw *hw)
 		hw->phy.sfp_setup_needed = false;
 	}
 
+	if (status == IXGBE_ERR_SFP_NOT_SUPPORTED)
+		goto reset_hw_out;
+
 	/* Reset PHY */
 	if (hw->phy.reset_disable == false && hw->phy.ops.reset != NULL)
 		hw->phy.ops.reset(hw);

drivers/net/ixgbe/ixgbe_phy.c

@@ -57,6 +57,7 @@ s32 ixgbe_identify_phy_generic(struct ixgbe_hw *hw)
 {
 	s32 status = IXGBE_ERR_PHY_ADDR_INVALID;
 	u32 phy_addr;
+	u16 ext_ability = 0;
 
 	if (hw->phy.type == ixgbe_phy_unknown) {
 		for (phy_addr = 0; phy_addr < IXGBE_MAX_PHY_ADDR; phy_addr++) {
@@ -65,11 +66,28 @@ s32 ixgbe_identify_phy_generic(struct ixgbe_hw *hw)
 				ixgbe_get_phy_id(hw);
 				hw->phy.type =
 				        ixgbe_get_phy_type_from_id(hw->phy.id);
+
+				if (hw->phy.type == ixgbe_phy_unknown) {
+					hw->phy.ops.read_reg(hw,
+							     MDIO_PMA_EXTABLE,
+							     MDIO_MMD_PMAPMD,
+							     &ext_ability);
+					if (ext_ability &
+					    (MDIO_PMA_EXTABLE_10GBT |
+					     MDIO_PMA_EXTABLE_1000BT))
+						hw->phy.type =
+							 ixgbe_phy_cu_unknown;
+					else
+						hw->phy.type =
+							 ixgbe_phy_generic;
+				}
+
 				status = 0;
 				break;
 			}
 		}
 		/* clear value if nothing found */
+		if (status != 0)
 			hw->phy.mdio.prtad = 0;
 	} else {
 		status = 0;
@@ -823,7 +841,6 @@ s32 ixgbe_identify_sfp_module_generic(struct ixgbe_hw *hw)
 			goto out;
 		}
 
-		/* This is guaranteed to be 82599, no need to check for NULL */
 		hw->mac.ops.get_device_caps(hw, &enforce_sfp);
 		if (!(enforce_sfp & IXGBE_DEVICE_CAPS_ALLOW_ANY_SFP) &&
 		    !((hw->phy.sfp_type == ixgbe_sfp_type_1g_cu_core0) ||