[PATCH net-next v13 13/18] net: phy: marvell10g: Support SFP through phy_port

Maxime Chevallier
2025-09-21T16:07:52Z

Convert the Marvell10G driver to use the generic SFP handling, through a
dedicated .attach_port() handler to populate the port's supported
interfaces.

As the 88x3310 supports multiple MDI, the .attach_port() logic handles
both SFP attach with 10GBaseR support, and support for the "regular"
port that usually is a BaseT port.

Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Tested-by: Oleksij Rempel <o.rempel@pengutronix.de>
Tested-by: Florian Fainelli <florian.fainelli@broadcom.com>
Tested-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
---
drivers/net/phy/marvell10g.c | 54 ++++++++++++++++++++++--------------
drivers/net/phy/phy_port.c | 44 +++++++++++++++++++++++++++++
include/linux/phy_port.h | 1 +
3 files changed, 78 insertions(+), 21 deletions(-)

diff --git a/drivers/net/phy/marvell10g.c b/drivers/net/phy/marvell10g.c
index 13e81dff42c1..833ea0c0dc22 100644
--- a/drivers/net/phy/marvell10g.c
+++ b/drivers/net/phy/marvell10g.c
@@ -28,7 +28,7 @@
#include <linux/hwmon.h>
#include <linux/marvell_phy.h>
#include <linux/phy.h>
-#include <linux/sfp.h>
+#include <linux/phy_port.h>
#include <linux/netdevice.h>

#define MV_PHY_ALASKA_NBT_QUIRK_MASK 0xfffffffe
@@ -463,36 +463,36 @@ static int mv3310_set_edpd(struct phy_device *phydev, u16 edpd)
return err;
}

-static int mv3310_sfp_insert(void *upstream, const struct sfp_eeprom_id *id)
+static int mv3310_attach_mii_port(struct phy_device *phydev,
+ struct phy_port *port)
{
- struct phy_device *phydev = upstream;
- __ETHTOOL_DECLARE_LINK_MODE_MASK(support) = { 0, };
- DECLARE_PHY_INTERFACE_MASK(interfaces);
- phy_interface_t iface;
-
- sfp_parse_support(phydev->sfp_bus, id, support, interfaces);
- iface = sfp_select_interface(phydev->sfp_bus, support);
+ __set_bit(PHY_INTERFACE_MODE_10GBASER, port->interfaces);

- if (iface != PHY_INTERFACE_MODE_10GBASER) {
- dev_err(&phydev->mdio.dev, "incompatible SFP module inserted\n");
- return -EINVAL;
- }
return 0;
}

-static const struct sfp_upstream_ops mv3310_sfp_ops = {
- .attach = phy_sfp_attach,
- .detach = phy_sfp_detach,
- .connect_phy = phy_sfp_connect_phy,
- .disconnect_phy = phy_sfp_disconnect_phy,
- .module_insert = mv3310_sfp_insert,
-};
+static int mv3310_attach_mdi_port(struct phy_device *phydev,
+ struct phy_port *port)
+{
+ /* This PHY can do combo-ports, i.e. 2 MDI outputs, usually one
+ * of them going to an SFP and the other one to a RJ45
+ * connector. If we don't have any representation for the port
+ * in DT, and we are dealing with a non-SFP port, then we
+ * mask the port's capabilities to report BaseT-only modes
+ */
+ if (port->not_described)
+ return phy_port_restrict_mediums(port,
+ BIT(ETHTOOL_LINK_MEDIUM_BASET));
+
+ return 0;
+}

static int mv3310_probe(struct phy_device *phydev)
{
const struct mv3310_chip *chip = to_mv3310_chip(phydev);
struct mv3310_priv *priv;
u32 mmd_mask = MDIO_DEVS_PMAPMD | MDIO_DEVS_AN;
+ DECLARE_PHY_INTERFACE_MASK(interfaces);
int ret;

if (!phydev->is_c45 ||
@@ -543,9 +543,13 @@ static int mv3310_probe(struct phy_device *phydev)
if (ret)
return ret;

+ __set_bit(PHY_INTERFACE_MODE_10GBASER, interfaces);
+
chip->init_supported_interfaces(priv->supported_interfaces);

- return phy_sfp_probe(phydev, &mv3310_sfp_ops);
+ phydev->max_n_ports = 2;
+
+ return 0;
}

static void mv3310_remove(struct phy_device *phydev)
@@ -1406,6 +1410,8 @@ static struct phy_driver mv3310_drivers[] = {
.set_loopback = genphy_c45_loopback,
.get_wol = mv3110_get_wol,
.set_wol = mv3110_set_wol,
+ .attach_mii_port = mv3310_attach_mii_port,
+ .attach_mdi_port = mv3310_attach_mdi_port,
},
{
.phy_id = MARVELL_PHY_ID_88X3310,
@@ -1425,6 +1431,8 @@ static struct phy_driver mv3310_drivers[] = {
.set_tunable = mv3310_set_tunable,
.remove = mv3310_remove,
.set_loopback = genphy_c45_loopback,
+ .attach_mii_port = mv3310_attach_mii_port,
+ .attach_mdi_port = mv3310_attach_mdi_port,
},
{
.phy_id = MARVELL_PHY_ID_88E2110,
@@ -1445,6 +1453,8 @@ static struct phy_driver mv3310_drivers[] = {
.set_loopback = genphy_c45_loopback,
.get_wol = mv3110_get_wol,
.set_wol = mv3110_set_wol,
+ .attach_mii_port = mv3310_attach_mii_port,
+ .attach_mdi_port = mv3310_attach_mdi_port,
},
{
.phy_id = MARVELL_PHY_ID_88E2110,
@@ -1463,6 +1473,8 @@ static struct phy_driver mv3310_drivers[] = {
.set_tunable = mv3310_set_tunable,
.remove = mv3310_remove,
.set_loopback = genphy_c45_loopback,
+ .attach_mii_port = mv3310_attach_mii_port,
+ .attach_mdi_port = mv3310_attach_mdi_port,
},
};

diff --git a/drivers/net/phy/phy_port.c b/drivers/net/phy/phy_port.c
index 6fecaa68350e..b1ba3e56c28d 100644
--- a/drivers/net/phy/phy_port.c
+++ b/drivers/net/phy/phy_port.c
@@ -131,6 +131,50 @@ void phy_port_update_supported(struct phy_port *port)
}
EXPORT_SYMBOL_GPL(phy_port_update_supported);

+/**
+ * phy_port_filter_supported() - Make sure that port->supported match port->mediums
+ * @port: The port to filter
+ *
+ * After updating a port's mediums to a more restricted subset, this helper will
+ * make sure that port->supported only contains linkmodes that are compatible
+ * with port->mediums.
+ */
+static void phy_port_filter_supported(struct phy_port *port)
+{
+ __ETHTOOL_DECLARE_LINK_MODE_MASK(supported) = { 0 };
+ int i;
+
+ for_each_set_bit(i, &port->mediums, __ETHTOOL_LINK_MEDIUM_LAST)
+ phy_caps_medium_get_supported(supported, i, port->lanes);
+
+ linkmode_and(port->supported, port->supported, supported);
+}
+
+/**
+ * phy_port_restrict_mediums - Mask away some of the port's supported mediums
+ * @port: The port to act upon
+ * @mediums: A mask of mediums to support on the port
+ *
+ * This helper allows removing some mediums from a port's list of supported
+ * mediums, which occurs once we have enough information about the port to
+ * know its nature.
+ *
+ * Returns 0 if the change was donne correctly, a negative value otherwise.
+ */
+int phy_port_restrict_mediums(struct phy_port *port, unsigned long mediums)
+{
+ /* We forbid ending-up with a port with empty mediums */
+ if (!(port->mediums & mediums))
+ return -EINVAL;
+
+ port->mediums &= mediums;
+
+ phy_port_filter_supported(port);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(phy_port_restrict_mediums);
+
/**
* phy_port_get_type() - get the PORT_* attribute for that port.
* @port: The port we want the information from
diff --git a/include/linux/phy_port.h b/include/linux/phy_port.h
index 053c35c70071..82f1992d2395 100644
--- a/include/linux/phy_port.h
+++ b/include/linux/phy_port.h
@@ -92,6 +92,7 @@ static inline bool phy_port_is_fiber(struct phy_port *port)
}

void phy_port_update_supported(struct phy_port *port);
+int phy_port_restrict_mediums(struct phy_port *port, unsigned long mediums);

int phy_port_get_type(struct phy_port *port);

--
2.49.0