phylink: get rid of separate Cisco SGMII and 802.3z modes

Since the handling of SGMII and 802.3z is now the same, combine the
MLO_AN_xxx constants into a single MLO_AN_INBAND, and use the PHY
interface mode to distinguish between Cisco SGMII and 802.3z.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/phy/phylink.c

@@ -117,8 +117,7 @@ static const char *phylink_an_mode_str(unsigned int mode)
 	static const char *modestr[] = {
 		[MLO_AN_PHY] = "phy",
 		[MLO_AN_FIXED] = "fixed",
-		[MLO_AN_SGMII] = "SGMII",
+		[MLO_AN_INBAND] = "inband",
-		[MLO_AN_8023Z] = "802.3z",
 	};
 
 	return mode < ARRAY_SIZE(modestr) ? modestr[mode] : "unknown";
@@ -244,6 +243,7 @@ static int phylink_parse_mode(struct phylink *pl, struct device_node *np)
 		phylink_set(pl->supported, Asym_Pause);
 		phylink_set(pl->supported, Pause);
 		pl->link_config.an_enabled = true;
+		pl->link_an_mode = MLO_AN_INBAND;
 
 		switch (pl->link_config.interface) {
 		case PHY_INTERFACE_MODE_SGMII:
@@ -253,17 +253,14 @@ static int phylink_parse_mode(struct phylink *pl, struct device_node *np)
 			phylink_set(pl->supported, 100baseT_Full);
 			phylink_set(pl->supported, 1000baseT_Half);
 			phylink_set(pl->supported, 1000baseT_Full);
-			pl->link_an_mode = MLO_AN_SGMII;
 			break;
 
 		case PHY_INTERFACE_MODE_1000BASEX:
 			phylink_set(pl->supported, 1000baseX_Full);
-			pl->link_an_mode = MLO_AN_8023Z;
 			break;
 
 		case PHY_INTERFACE_MODE_2500BASEX:
 			phylink_set(pl->supported, 2500baseX_Full);
-			pl->link_an_mode = MLO_AN_8023Z;
 			break;
 
 		case PHY_INTERFACE_MODE_10GKR:
@@ -280,7 +277,6 @@ static int phylink_parse_mode(struct phylink *pl, struct device_node *np)
 			phylink_set(pl->supported, 10000baseLR_Full);
 			phylink_set(pl->supported, 10000baseLRM_Full);
 			phylink_set(pl->supported, 10000baseER_Full);
-			pl->link_an_mode = MLO_AN_SGMII;
 			break;
 
 		default:
@@ -422,8 +418,7 @@ static void phylink_resolve(struct work_struct *w)
 			phylink_mac_config(pl, &link_state);
 			break;
 
-		case MLO_AN_SGMII:
+		case MLO_AN_INBAND:
-		case MLO_AN_8023Z:
 			phylink_get_mac_state(pl, &link_state);
 			if (pl->phydev) {
 				bool changed = false;
@@ -654,7 +649,8 @@ int phylink_connect_phy(struct phylink *pl, struct phy_device *phy)
 	int ret;
 
 	if (WARN_ON(pl->link_an_mode == MLO_AN_FIXED ||
-		    pl->link_an_mode == MLO_AN_8023Z))
+		    (pl->link_an_mode == MLO_AN_INBAND &&
+		     phy_interface_mode_is_8023z(pl->link_interface))))
 		return -EINVAL;
 
 	ret = phy_attach_direct(pl->netdev, phy, 0, pl->link_interface);
@@ -677,7 +673,8 @@ int phylink_of_phy_connect(struct phylink *pl, struct device_node *dn)
 
 	/* Fixed links and 802.3z are handled without needing a PHY */
 	if (pl->link_an_mode == MLO_AN_FIXED ||
-	    pl->link_an_mode == MLO_AN_8023Z)
+	    (pl->link_an_mode == MLO_AN_INBAND &&
+	     phy_interface_mode_is_8023z(pl->link_interface)))
 		return 0;
 
 	phy_node = of_parse_phandle(dn, "phy-handle", 0);
@@ -851,8 +848,7 @@ int phylink_ethtool_ksettings_get(struct phylink *pl,
 		phylink_get_ksettings(&link_state, kset);
 		break;
 
-	case MLO_AN_SGMII:
+	case MLO_AN_INBAND:
-	case MLO_AN_8023Z:
 		/* If there is a phy attached, then use the reported
 		 * settings from the phy with no modification.
 		 */
@@ -1029,8 +1025,7 @@ int phylink_ethtool_set_pauseparam(struct phylink *pl,
 			phylink_mac_config(pl, config);
 			break;
 
-		case MLO_AN_SGMII:
+		case MLO_AN_INBAND:
-		case MLO_AN_8023Z:
 			phylink_mac_config(pl, config);
 			phylink_mac_an_restart(pl);
 			break;
@@ -1247,9 +1242,7 @@ static int phylink_mii_read(struct phylink *pl, unsigned int phy_id,
 	case MLO_AN_PHY:
 		return -EOPNOTSUPP;
 
-	case MLO_AN_SGMII:
+	case MLO_AN_INBAND:
-		/* No phy, fall through to 8023z method */
-	case MLO_AN_8023Z:
 		if (phy_id == 0) {
 			val = phylink_get_mac_state(pl, &state);
 			if (val < 0)
@@ -1274,9 +1267,7 @@ static int phylink_mii_write(struct phylink *pl, unsigned int phy_id,
 	case MLO_AN_PHY:
 		return -EOPNOTSUPP;
 
-	case MLO_AN_SGMII:
+	case MLO_AN_INBAND:
-		/* No phy, fall through to 8023z method */
-	case MLO_AN_8023Z:
 		break;
 	}
 
@@ -1291,7 +1282,7 @@ int phylink_mii_ioctl(struct phylink *pl, struct ifreq *ifr, int cmd)
 	WARN_ON(!lockdep_rtnl_is_held());
 
 	if (pl->phydev) {
-		/* PHYs only exist for MLO_AN_PHY and MLO_AN_SGMII */
+		/* PHYs only exist for MLO_AN_PHY and SGMII */
 		switch (cmd) {
 		case SIOCGMIIPHY:
 			mii->phy_id = pl->phydev->mdio.addr;
@@ -1360,10 +1351,8 @@ static int phylink_sfp_module_insert(void *upstream,
 
 	switch (iface) {
 	case PHY_INTERFACE_MODE_SGMII:
-		mode = MLO_AN_SGMII;
-		break;
 	case PHY_INTERFACE_MODE_1000BASEX:
-		mode = MLO_AN_8023Z;
+		mode = MLO_AN_INBAND;
 		break;
 	default:
 		return -EINVAL;
@@ -1390,7 +1379,7 @@ static int phylink_sfp_module_insert(void *upstream,
 		   phylink_an_mode_str(mode), phy_modes(config.interface),
 		   __ETHTOOL_LINK_MODE_MASK_NBITS, support);
 
-	if (mode == MLO_AN_8023Z && pl->phydev)
+	if (phy_interface_mode_is_8023z(iface) && pl->phydev)
 		return -EINVAL;
 
 	changed = !bitmap_equal(pl->supported, support,

include/linux/phylink.h

@@ -20,13 +20,12 @@ enum {
 
 	MLO_AN_PHY = 0,	/* Conventional PHY */
 	MLO_AN_FIXED,	/* Fixed-link mode */
-	MLO_AN_SGMII,	/* Cisco SGMII protocol */
+	MLO_AN_INBAND,	/* In-band protocol */
-	MLO_AN_8023Z,	/* 1000base-X protocol */
 };
 
 static inline bool phylink_autoneg_inband(unsigned int mode)
 {
-	return mode == MLO_AN_SGMII || mode == MLO_AN_8023Z;
+	return mode == MLO_AN_INBAND;
 }
 
 struct phylink_link_state {
@@ -69,7 +68,7 @@ struct phylink_mac_ops {
 	/**
 	 * mac_config: configure the MAC for the selected mode and state
 	 * @ndev: net_device structure for the MAC
-	 * @mode: one of MLO_AN_FIXED, MLO_AN_PHY, MLO_AN_8023Z, MLO_AN_SGMII
+	 * @mode: one of MLO_AN_FIXED, MLO_AN_PHY, MLO_AN_INBAND
 	 * @state: state structure
 	 *
 	 * The action performed depends on the currently selected mode:
@@ -77,14 +76,10 @@ struct phylink_mac_ops {
 	 * %MLO_AN_FIXED, %MLO_AN_PHY:
 	 *   set the specified speed, duplex, pause mode, and phy interface
 	 *   mode in the provided @state.
-	 * %MLO_AN_8023Z:
+	 * %MLO_AN_INBAND:
-	 *   place the link in 1000base-X mode, advertising the parameters
+	 *   place the link in an inband negotiation mode (such as
-	 *   given in advertising in @state.
+	 *   1000base-X or Cisco SGMII mode depending on the phy interface
-	 * %MLO_AN_SGMII:
+	 *   mode), advertising the parameters given in advertising in @state.
-	 *   place the link in Cisco SGMII mode - there is no advertisment
-	 *   to make as the PHY communicates the speed and duplex to the
-	 *   MAC over the in-band control word.  Configuration of the pause
-	 *   mode is as per MLO_AN_PHY since this is not included.
 	 */
 	void (*mac_config)(struct net_device *ndev, unsigned int mode,
 			   const struct phylink_link_state *state);