Merge branch 'remove-some-unused-phylink-legacy'

Russell King says:

====================
Remove some unused phylink legacy

I believe we are now in a position where some of the legacy phylink code
can be removed!

I believe that all DSA drivers do not make use of any pre-March 2020
phylink behaviour - all drivers now seem to set legacy_pre_march2020 to
false, and the conditions that DSA sets it to true are no longer
satisifed by any driver.

Moreover, no one uses the .mac_an_restart() method, so this can also be
removed.
====================

Link: https://lore.kernel.org/r/ZLERQ2OBrv44Ppyc@shell.armlinux.org.ukSigned-off-by: Paolo Abeni <pabeni@redhat.com>

drivers/net/dsa/b53/b53_common.c

@@ -1393,12 +1393,6 @@ static void b53_phylink_get_caps(struct dsa_switch *ds, int port,
 	/* Get the implementation specific capabilities */
 	if (dev->ops->phylink_get_caps)
 		dev->ops->phylink_get_caps(dev, port, config);
-
-	/* This driver does not make use of the speed, duplex, pause or the
-	 * advertisement in its mac_config, so it is safe to mark this driver
-	 * as non-legacy.
-	 */
-	config->legacy_pre_march2020 = false;
 }
 
 static struct phylink_pcs *b53_phylink_mac_select_pcs(struct dsa_switch *ds,

drivers/net/dsa/lan9303-core.c

@@ -1290,12 +1290,6 @@ static void lan9303_phylink_get_caps(struct dsa_switch *ds, int port,
 		__set_bit(PHY_INTERFACE_MODE_GMII,
 			  config->supported_interfaces);
 	}
-
-	/* This driver does not make use of the speed, duplex, pause or the
-	 * advertisement in its mac_config, so it is safe to mark this driver
-	 * as non-legacy.
-	 */
-	config->legacy_pre_march2020 = false;
 }
 
 static void lan9303_phylink_mac_link_up(struct dsa_switch *ds, int port,

drivers/net/dsa/microchip/ksz_common.c

@@ -1624,8 +1624,6 @@ static void ksz_phylink_get_caps(struct dsa_switch *ds, int port,
 {
 	struct ksz_device *dev = ds->priv;
 
-	config->legacy_pre_march2020 = false;
-
 	if (dev->info->supports_mii[port])
 		__set_bit(PHY_INTERFACE_MODE_MII, config->supported_interfaces);
 

drivers/net/dsa/mt7530.c

@@ -2949,12 +2949,6 @@ static void mt753x_phylink_get_caps(struct dsa_switch *ds, int port,
 	config->mac_capabilities = MAC_ASYM_PAUSE | MAC_SYM_PAUSE |
 				   MAC_10 | MAC_100 | MAC_1000FD;
 
-	/* This driver does not make use of the speed, duplex, pause or the
-	 * advertisement in its mac_config, so it is safe to mark this driver
-	 * as non-legacy.
-	 */
-	config->legacy_pre_march2020 = false;
-
 	priv->info->mac_port_get_caps(ds, port, config);
 }
 

drivers/net/dsa/mv88e6xxx/chip.c

@@ -769,10 +769,6 @@ static void mv88e6xxx_get_caps(struct dsa_switch *ds, int port,
 		__set_bit(PHY_INTERFACE_MODE_GMII,
 			  config->supported_interfaces);
 	}
-
-	/* If we have a .pcs_init, we are not legacy. */
-	if (chip->info->ops->pcs_ops)
-		config->legacy_pre_march2020 = false;
 }
 
 static struct phylink_pcs *mv88e6xxx_mac_select_pcs(struct dsa_switch *ds,

drivers/net/dsa/ocelot/felix.c

@@ -1042,12 +1042,6 @@ static void felix_phylink_get_caps(struct dsa_switch *ds, int port,
 {
 	struct ocelot *ocelot = ds->priv;
 
-	/* This driver does not make use of the speed, duplex, pause or the
-	 * advertisement in its mac_config, so it is safe to mark this driver
-	 * as non-legacy.
-	 */
-	config->legacy_pre_march2020 = false;
-
 	config->mac_capabilities = MAC_ASYM_PAUSE | MAC_SYM_PAUSE |
 				   MAC_10 | MAC_100 | MAC_1000FD |
 				   MAC_2500FD;

drivers/net/dsa/qca/qca8k-8xxx.c

@@ -1397,8 +1397,6 @@ static void qca8k_phylink_get_caps(struct dsa_switch *ds, int port,
 
 	config->mac_capabilities = MAC_ASYM_PAUSE | MAC_SYM_PAUSE |
 		MAC_10 | MAC_100 | MAC_1000FD;
-
-	config->legacy_pre_march2020 = false;
 }
 
 static void

drivers/net/dsa/sja1105/sja1105_main.c

@@ -1396,12 +1396,6 @@ static void sja1105_phylink_get_caps(struct dsa_switch *ds, int port,
 	struct sja1105_xmii_params_entry *mii;
 	phy_interface_t phy_mode;
 
-	/* This driver does not make use of the speed, duplex, pause or the
-	 * advertisement in its mac_config, so it is safe to mark this driver
-	 * as non-legacy.
-	 */
-	config->legacy_pre_march2020 = false;
-
 	phy_mode = priv->phy_mode[port];
 	if (phy_mode == PHY_INTERFACE_MODE_SGMII ||
 	    phy_mode == PHY_INTERFACE_MODE_2500BASEX) {

drivers/net/phy/phylink.c

@@ -1079,17 +1079,13 @@ static void phylink_mac_config(struct phylink *pl,
 	pl->mac_ops->mac_config(pl->config, pl->cur_link_an_mode, state);
 }
 
-static void phylink_mac_pcs_an_restart(struct phylink *pl)
+static void phylink_pcs_an_restart(struct phylink *pl)
 {
-	if (linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
-			      pl->link_config.advertising) &&
+	if (pl->pcs && linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
+					 pl->link_config.advertising) &&
 	    phy_interface_mode_is_8023z(pl->link_config.interface) &&
-	    phylink_autoneg_inband(pl->cur_link_an_mode)) {
-		if (pl->pcs)
-			pl->pcs->ops->pcs_an_restart(pl->pcs);
-		else if (pl->config->legacy_pre_march2020)
-			pl->mac_ops->mac_an_restart(pl->config);
-	}
+	    phylink_autoneg_inband(pl->cur_link_an_mode))
+		pl->pcs->ops->pcs_an_restart(pl->pcs);
 }
 
 static void phylink_major_config(struct phylink *pl, bool restart,
@@ -1169,7 +1165,7 @@ static void phylink_major_config(struct phylink *pl, bool restart,
 		restart = true;
 
 	if (restart)
-		phylink_mac_pcs_an_restart(pl);
+		phylink_pcs_an_restart(pl);
 
 	if (pl->mac_ops->mac_finish) {
 		err = pl->mac_ops->mac_finish(pl->config, pl->cur_link_an_mode,
@@ -1205,7 +1201,7 @@ static int phylink_change_inband_advert(struct phylink *pl)
 	if (!pl->pcs && pl->config->legacy_pre_march2020) {
 		/* Legacy method */
 		phylink_mac_config(pl, &pl->link_config);
-		phylink_mac_pcs_an_restart(pl);
+		phylink_pcs_an_restart(pl);
 		return 0;
 	}
 
@@ -1234,7 +1230,7 @@ static int phylink_change_inband_advert(struct phylink *pl)
 		return ret;
 
 	if (ret > 0)
-		phylink_mac_pcs_an_restart(pl);
+		phylink_pcs_an_restart(pl);
 
 	return 0;
 }
@@ -2533,7 +2529,7 @@ int phylink_ethtool_nway_reset(struct phylink *pl)
 
 	if (pl->phydev)
 		ret = phy_restart_aneg(pl->phydev);
-	phylink_mac_pcs_an_restart(pl);
+	phylink_pcs_an_restart(pl);
 
 	return ret;
 }

include/linux/phylink.h

@@ -234,7 +234,6 @@ struct phylink_config {
  * @mac_prepare: prepare for a major reconfiguration of the interface.
  * @mac_config: configure the MAC for the selected mode and state.
  * @mac_finish: finish a major reconfiguration of the interface.
- * @mac_an_restart: restart 802.3z BaseX autonegotiation.
  * @mac_link_down: take the link down.
  * @mac_link_up: allow the link to come up.
  *
@@ -254,7 +253,6 @@ struct phylink_mac_ops {
 			   const struct phylink_link_state *state);
 	int (*mac_finish)(struct phylink_config *config, unsigned int mode,
 			  phy_interface_t iface);
-	void (*mac_an_restart)(struct phylink_config *config);
 	void (*mac_link_down)(struct phylink_config *config, unsigned int mode,
 			      phy_interface_t interface);
 	void (*mac_link_up)(struct phylink_config *config,
@@ -459,16 +457,6 @@ void mac_config(struct phylink_config *config, unsigned int mode,
 int mac_finish(struct phylink_config *config, unsigned int mode,
 		phy_interface_t iface);
 
-/**
- * mac_an_restart() - restart 802.3z BaseX autonegotiation
- * @config: a pointer to a &struct phylink_config.
- *
- * Note: This is a legacy method. This function will not be called unless
- * legacy_pre_march2020 is set in &struct phylink_config and there is no
- * PCS attached.
- */
-void mac_an_restart(struct phylink_config *config);
-
 /**
  * mac_link_down() - take the link down
  * @config: a pointer to a &struct phylink_config.

include/net/dsa.h

@@ -873,8 +873,6 @@ struct dsa_switch_ops {
 	struct phylink_pcs *(*phylink_mac_select_pcs)(struct dsa_switch *ds,
 						      int port,
 						      phy_interface_t iface);
-	int	(*phylink_mac_link_state)(struct dsa_switch *ds, int port,
-					  struct phylink_link_state *state);
 	int	(*phylink_mac_prepare)(struct dsa_switch *ds, int port,
 				       unsigned int mode,
 				       phy_interface_t interface);
@@ -884,7 +882,6 @@ struct dsa_switch_ops {
 	int	(*phylink_mac_finish)(struct dsa_switch *ds, int port,
 				      unsigned int mode,
 				      phy_interface_t interface);
-	void	(*phylink_mac_an_restart)(struct dsa_switch *ds, int port);
 	void	(*phylink_mac_link_down)(struct dsa_switch *ds, int port,
 					 unsigned int mode,
 					 phy_interface_t interface);

net/dsa/port.c

@@ -1568,27 +1568,6 @@ static void dsa_port_phylink_validate(struct phylink_config *config,
 		phylink_generic_validate(config, supported, state);
 }
 
-static void dsa_port_phylink_mac_pcs_get_state(struct phylink_config *config,
-					       struct phylink_link_state *state)
-{
-	struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
-	struct dsa_switch *ds = dp->ds;
-	int err;
-
-	/* Only called for inband modes */
-	if (!ds->ops->phylink_mac_link_state) {
-		state->link = 0;
-		return;
-	}
-
-	err = ds->ops->phylink_mac_link_state(ds, dp->index, state);
-	if (err < 0) {
-		dev_err(ds->dev, "p%d: phylink_mac_link_state() failed: %d\n",
-			dp->index, err);
-		state->link = 0;
-	}
-}
-
 static struct phylink_pcs *
 dsa_port_phylink_mac_select_pcs(struct phylink_config *config,
 				phy_interface_t interface)
@@ -1646,17 +1625,6 @@ static int dsa_port_phylink_mac_finish(struct phylink_config *config,
 	return err;
 }
 
-static void dsa_port_phylink_mac_an_restart(struct phylink_config *config)
-{
-	struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
-	struct dsa_switch *ds = dp->ds;
-
-	if (!ds->ops->phylink_mac_an_restart)
-		return;
-
-	ds->ops->phylink_mac_an_restart(ds, dp->index);
-}
-
 static void dsa_port_phylink_mac_link_down(struct phylink_config *config,
 					   unsigned int mode,
 					   phy_interface_t interface)
@@ -1700,11 +1668,9 @@ static void dsa_port_phylink_mac_link_up(struct phylink_config *config,
 static const struct phylink_mac_ops dsa_port_phylink_mac_ops = {
 	.validate = dsa_port_phylink_validate,
 	.mac_select_pcs = dsa_port_phylink_mac_select_pcs,
-	.mac_pcs_get_state = dsa_port_phylink_mac_pcs_get_state,
 	.mac_prepare = dsa_port_phylink_mac_prepare,
 	.mac_config = dsa_port_phylink_mac_config,
 	.mac_finish = dsa_port_phylink_mac_finish,
-	.mac_an_restart = dsa_port_phylink_mac_an_restart,
 	.mac_link_down = dsa_port_phylink_mac_link_down,
 	.mac_link_up = dsa_port_phylink_mac_link_up,
 };
@@ -1720,13 +1686,6 @@ int dsa_port_phylink_create(struct dsa_port *dp)
 	if (err)
 		mode = PHY_INTERFACE_MODE_NA;
 
-	/* Presence of phylink_mac_link_state or phylink_mac_an_restart is
-	 * an indicator of a legacy phylink driver.
-	 */
-	if (ds->ops->phylink_mac_link_state ||
-	    ds->ops->phylink_mac_an_restart)
-		dp->pl_config.legacy_pre_march2020 = true;
-
 	if (ds->ops->phylink_get_caps)
 		ds->ops->phylink_get_caps(ds, dp->index, &dp->pl_config);