net: phylink/dsa: fix DSA and CPU links

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>

5 files changed, 56 insertions, 28 deletions

diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index f392613f6373..543bd9cdd3ca 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -428,37 +428,21 @@ static int mv88e6xxx_port_setup_mac(struct mv88e6xxx_chip *chip, int port,
 	if (!chip->info->ops->port_set_link)
 		return 0;
 
-	if (speed = SPEED_MAX) {
-		if (chip->info->ops->port_max_speed_mode)
-			mode = chip->info->ops->port_max_speed_mode(port);
-		if (chip->info->ops->port_max_speed)
-			speed = chip->info->ops->port_max_speed(port);
-	}
-
 	/* Port's MAC control must not be changed unless the link is down */
 	err = chip->info->ops->port_set_link(chip, port, LINK_FORCED_DOWN);
 	if (err)
 		return err;
 
-	if (chip->info->ops->port_set_speed_duplex) {
-		err = chip->info->ops->port_set_speed_duplex(chip, port,
-							     speed, duplex);
-		if (err && err != -EOPNOTSUPP)
-			goto restore_link;
-	}
-
 	if (chip->info->ops->port_set_pause) {
 		err = chip->info->ops->port_set_pause(chip, port, pause);
 		if (err)
-			goto restore_link;
+			return err;
 	}
 
-	err = mv88e6xxx_port_config_interface(chip, port, mode);
-restore_link:
 	if (chip->info->ops->port_set_link(chip, port, link))
 		dev_err(chip->dev, "p%d: failed to restore MAC's link\n", port);
 
-	return err;
+	return 0;
 }
 
 static int mv88e6xxx_phy_is_internal(struct dsa_switch *ds, int port)
@@ -559,6 +543,19 @@ static int mv88e6xxx_serdes_pcs_link_up(struct mv88e6xxx_chip *chip, int port,
 	return 0;
 }
 
+static void mv88e6xxx_default_config(struct dsa_switch *ds, int port,
+				     struct phylink_link_state *state)
+{
+	struct mv88e6xxx_chip *chip = ds->priv;
+
+	if (chip->info->ops->port_max_speed_mode)
+		state->interface = chip->info->ops->port_max_speed_mode(port);
+
+	state->duplex = DUPLEX_FULL;
+	state->speed = chip->info->ops->port_max_speed(port);
+	state->link = true;
+}
+
 static void mv88e6065_phylink_validate(struct mv88e6xxx_chip *chip, int port,
 				       unsigned long *mask,
 				       struct phylink_link_state *state)
@@ -2571,16 +2568,10 @@ static int mv88e6xxx_setup_port(struct mv88e6xxx_chip *chip, int port)
 	 * state to any particular values on physical ports, but force the CPU
 	 * port and all DSA ports to their maximum bandwidth and full duplex.
 	 */
-	if (dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port))
-		err = mv88e6xxx_port_setup_mac(chip, port, LINK_FORCED_UP,
-					       SPEED_MAX, DUPLEX_FULL,
-					       PAUSE_OFF,
-					       PHY_INTERFACE_MODE_NA);
-	else
-		err = mv88e6xxx_port_setup_mac(chip, port, LINK_UNFORCED,
-					       SPEED_UNFORCED, DUPLEX_UNFORCED,
-					       PAUSE_ON,
-					       PHY_INTERFACE_MODE_NA);
+	err = mv88e6xxx_port_setup_mac(chip, port, LINK_UNFORCED,
+				       SPEED_UNFORCED, DUPLEX_UNFORCED,
+				       PAUSE_ON,
+				       PHY_INTERFACE_MODE_NA);
 	if (err)
 		return err;
 
@@ -5597,6 +5588,7 @@ static const struct dsa_switch_ops mv88e6xxx_switch_ops = {
 	.get_tag_protocol	= mv88e6xxx_get_tag_protocol,
 	.setup			= mv88e6xxx_setup,
 	.teardown		= mv88e6xxx_teardown,
+	.phylink_default_config	= mv88e6xxx_default_config,
 	.phylink_validate	= mv88e6xxx_validate,
 	.phylink_mac_link_state	= mv88e6xxx_serdes_pcs_get_state,
 	.phylink_mac_config	= mv88e6xxx_mac_config,
diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c
index 6680de39e338..a32eb56d48f3 100644
--- a/drivers/net/phy/phylink.c
+++ b/drivers/net/phy/phylink.c
@@ -1188,6 +1188,21 @@ void phylink_start(struct phylink *pl)
 
 	ASSERT_RTNL();
 
+	/*
+	 * If no PHY or SFP attached, and but we're in PHY mode,
+	 * attempt to pick up a default configuration.
+	 */
+	if (pl->cfg_link_an_mode == MLO_AN_PHY && !pl->phydev && !pl->sfp_bus) {
+		if (pl->mac_ops->default_config) {
+			pl->mac_ops->default_config(pl->config,
+						    &pl->link_config);
+			pl->cfg_link_an_mode = MLO_AN_FIXED;
+			pl->cur_link_an_mode = MLO_AN_FIXED;
+		} else {
+			phylink_warn(pl, "no default configuration\n");
+		}
+	}
+
 	phylink_info(pl, "configuring for %s/%s link mode\n",
 		     phylink_an_mode_str(pl->cur_link_an_mode),
 		     phy_modes(pl->link_config.interface));
diff --git a/include/linux/phylink.h b/include/linux/phylink.h
index f19cd028afb0..32794f90924b 100644
--- a/include/linux/phylink.h
+++ b/include/linux/phylink.h
@@ -91,6 +91,8 @@ struct phylink_config {
  * The individual methods are described more fully below.
  */
 struct phylink_mac_ops {
+	void (*default_config)(struct phylink_config *config,
+			       struct phylink_link_state *state);
 	void (*validate)(struct phylink_config *config,
 			 unsigned long *supported,
 			 struct phylink_link_state *state);
diff --git a/include/net/dsa.h b/include/net/dsa.h
index 75c8fac82017..11f8875d34a1 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -438,6 +438,8 @@ struct dsa_switch_ops {
 	/*
 	 * PHYLINK integration
 	 */
+	void	(*phylink_default_config)(struct dsa_switch *ds, int port,
+					  struct phylink_link_state *state);
 	void	(*phylink_validate)(struct dsa_switch *ds, int port,
 				    unsigned long *supported,
 				    struct phylink_link_state *state);
diff --git a/net/dsa/port.c b/net/dsa/port.c
index 376d02373e59..2938a1b93d4f 100644
--- a/net/dsa/port.c
+++ b/net/dsa/port.c
@@ -485,6 +485,22 @@ static struct phy_device *dsa_port_get_phy_device(struct dsa_port *dp)
 	return phydev;
 }
 
+static void dsa_port_phylink_default_config(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;
+
+	if (dp->type == DSA_PORT_TYPE_USER ||
+	    !ds->ops->phylink_default_config) {
+		dev_err(ds->dev, "p%d: improper configuration for port\n",
+			dp->index);
+		return;
+	}
+
+	ds->ops->phylink_default_config(ds, dp->index, state);
+}
+
 static void dsa_port_phylink_validate(struct phylink_config *config,
 				      unsigned long *supported,
 				      struct phylink_link_state *state)
@@ -590,6 +606,7 @@ static void dsa_port_phylink_mac_link_up(struct phylink_config *config,
 }
 
 const struct phylink_mac_ops dsa_port_phylink_mac_ops = {
+	.default_config = dsa_port_phylink_default_config,
 	.validate = dsa_port_phylink_validate,
 	.mac_pcs_get_state = dsa_port_phylink_mac_pcs_get_state,
 	.mac_config = dsa_port_phylink_mac_config,