netdev - [PATCH RFC net-next 5/8] net: phylink: pass supported PHY interface modes to phylib

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Date:   Wed, 10 Nov 2021 20:07:06 +0100
From:   Marek Behún <kabel@...nel.org>
To:     Andrew Lunn <andrew@...n.ch>, netdev@...r.kernel.org
Cc:     devicetree@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
        Russell King <rmk+kernel@...linux.org.uk>, pali@...nel.org,
        Marek Behún <kabel@...nel.org>
Subject: [PATCH RFC net-next 5/8] net: phylink: pass supported PHY interface modes to phylib

Pass the supported PHY interface types to phylib so that PHY drivers
can select an appropriate host configuration mode for their interface
according to the host capabilities.

Signed-off-by: Marek Behún <kabel@...nel.org>
---
 drivers/net/phy/phylink.c | 28 ++++++++++++++++++++++++++++
 include/linux/phy.h       |  4 ++++
 2 files changed, 32 insertions(+)

diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c
index 4a8a0adf8c6c..0697c88227f7 100644
--- a/drivers/net/phy/phylink.c
+++ b/drivers/net/phy/phylink.c
@@ -1178,6 +1178,10 @@ int phylink_connect_phy(struct phylink *pl, struct phy_device *phy)
 {
 	int ret;
 
+	/* Set the PHY's host supported interfaces */
+	phy_interface_copy(phy->host_interfaces,
+			   pl->config->supported_interfaces);
+
 	/* Use PHY device/driver interface */
 	if (pl->link_interface == PHY_INTERFACE_MODE_NA) {
 		pl->link_interface = phy->interface;
@@ -1253,6 +1257,10 @@ int phylink_fwnode_phy_connect(struct phylink *pl,
 	if (!phy_dev)
 		return -ENODEV;
 
+	/* Set the PHY's host supported interfaces */
+	phy_interface_copy(phy_dev->host_interfaces,
+			   pl->config->supported_interfaces);
+
 	ret = phy_attach_direct(pl->netdev, phy_dev, flags,
 				pl->link_interface);
 	if (ret) {
@@ -2437,6 +2445,8 @@ static bool phylink_phy_no_inband(struct phy_device *phy)
 		(phy->c45_ids.device_ids[1] & 0xfffffff0) == 0xae025150;
 }
 
+static DECLARE_PHY_INTERFACE_MASK(phylink_sfp_interfaces);
+
 static int phylink_sfp_connect_phy(void *upstream, struct phy_device *phy)
 {
 	struct phylink *pl = upstream;
@@ -2458,6 +2468,10 @@ static int phylink_sfp_connect_phy(void *upstream, struct phy_device *phy)
 	else
 		mode = MLO_AN_INBAND;
 
+	/* Set the PHY's host supported interfaces */
+	phy_interface_and(phy->host_interfaces, phylink_sfp_interfaces,
+			  pl->config->supported_interfaces);
+
 	/* Do the initial configuration */
 	ret = phylink_sfp_config(pl, mode, phy->supported, phy->advertising);
 	if (ret < 0)
@@ -2819,4 +2833,18 @@ void phylink_mii_c45_pcs_get_state(struct mdio_device *pcs,
 }
 EXPORT_SYMBOL_GPL(phylink_mii_c45_pcs_get_state);
 
+static int __init phylink_init(void)
+{
+	__set_bit(PHY_INTERFACE_MODE_USXGMII, phylink_sfp_interfaces);
+	__set_bit(PHY_INTERFACE_MODE_10GBASER, phylink_sfp_interfaces);
+	__set_bit(PHY_INTERFACE_MODE_10GKR, phylink_sfp_interfaces);
+	__set_bit(PHY_INTERFACE_MODE_5GBASER, phylink_sfp_interfaces);
+	__set_bit(PHY_INTERFACE_MODE_2500BASEX, phylink_sfp_interfaces);
+	__set_bit(PHY_INTERFACE_MODE_SGMII, phylink_sfp_interfaces);
+	__set_bit(PHY_INTERFACE_MODE_1000BASEX, phylink_sfp_interfaces);
+
+	return 0;
+}
+module_init(phylink_init);
+
 MODULE_LICENSE("GPL v2");
diff --git a/include/linux/phy.h b/include/linux/phy.h
index effa4137f173..e05146b383ab 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -569,6 +569,7 @@ struct macsec_ops;
  * @advertising: Currently advertised linkmodes
  * @adv_old: Saved advertised while power saving for WoL
  * @lp_advertising: Current link partner advertised linkmodes
+ * @host_interfaces: PHY interface modes supported by host
  * @eee_broken_modes: Energy efficient ethernet modes which should be prohibited
  * @autoneg: Flag autoneg being used
  * @link: Current link state
@@ -658,6 +659,9 @@ struct phy_device {
 	/* used with phy_speed_down */
 	__ETHTOOL_DECLARE_LINK_MODE_MASK(adv_old);
 
+	/* host supported PHY interface types */
+	DECLARE_PHY_INTERFACE_MASK(host_interfaces);
+
 	/* Energy efficient ethernet modes which should be prohibited */
 	u32 eee_broken_modes;
 
-- 
2.32.0