diff --git a/Documentation/devicetree/bindings/net/dsa/arrow,xrs700x.yaml b/Documentation/devicetree/bindings/net/dsa/arrow,xrs700x.yaml
index 3f01b65f3b22705a31d7aee582431b7eb004f52f..eb01a8f37ce449eecd32a1fc6340e28a7fba058b 100644
--- a/Documentation/devicetree/bindings/net/dsa/arrow,xrs700x.yaml
+++ b/Documentation/devicetree/bindings/net/dsa/arrow,xrs700x.yaml
@@ -63,6 +63,8 @@ examples:
reg = <3>;
label = "cpu";
ethernet = <&fec1>;
+ phy-mode = "rgmii-id";
+
fixed-link {
speed = <1000>;
full-duplex;
diff --git a/Documentation/devicetree/bindings/net/dsa/brcm,b53.yaml b/Documentation/devicetree/bindings/net/dsa/brcm,b53.yaml
index 23114d691d2a17b0797ac01add974f05e40b4146..2e01371b8288ce1cfcb7a838b4a849a304c82519 100644
--- a/Documentation/devicetree/bindings/net/dsa/brcm,b53.yaml
+++ b/Documentation/devicetree/bindings/net/dsa/brcm,b53.yaml
@@ -254,6 +254,8 @@ examples:
ethernet = <&amac2>;
label = "cpu";
reg = <8>;
+ phy-mode = "internal";
+
fixed-link {
speed = <1000>;
full-duplex;
diff --git a/Documentation/devicetree/bindings/net/dsa/dsa-port.yaml b/Documentation/devicetree/bindings/net/dsa/dsa-port.yaml
index 09317e16cb5dbde4e792a17ef90c37e60c9bcd5c..10ad7e71097b57d7fa08bc58004b35423ff4b640 100644
--- a/Documentation/devicetree/bindings/net/dsa/dsa-port.yaml
+++ b/Documentation/devicetree/bindings/net/dsa/dsa-port.yaml
@@ -76,6 +76,23 @@ properties:
required:
- reg
+# CPU and DSA ports must have phylink-compatible link descriptions
+if:
+ oneOf:
+ - required: [ ethernet ]
+ - required: [ link ]
+then:
+ allOf:
+ - required:
+ - phy-mode
+ - oneOf:
+ - required:
+ - fixed-link
+ - required:
+ - phy-handle
+ - required:
+ - managed
+
additionalProperties: true
...
diff --git a/Documentation/devicetree/bindings/net/dsa/hirschmann,hellcreek.yaml b/Documentation/devicetree/bindings/net/dsa/hirschmann,hellcreek.yaml
index 228683773151c04a1105d06d0a11226f87b488cd..1ff44dd68a61274216e08551bb91ea85722e30f7 100644
--- a/Documentation/devicetree/bindings/net/dsa/hirschmann,hellcreek.yaml
+++ b/Documentation/devicetree/bindings/net/dsa/hirschmann,hellcreek.yaml
@@ -93,6 +93,12 @@ examples:
reg = <0>;
label = "cpu";
ethernet = <&gmac0>;
+ phy-mode = "mii";
+
+ fixed-link {
+ speed = <100>;
+ full-duplex;
+ };
};
port@2 {
diff --git a/Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml b/Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml
index 6bbd8145b6c1aba45663db05eda8a4465f52448d..456802affc9d88bdd5e33e301574d1c0bc98f9be 100644
--- a/Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml
+++ b/Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml
@@ -109,6 +109,8 @@ examples:
reg = <5>;
label = "cpu";
ethernet = <ð0>;
+ phy-mode = "rgmii";
+
fixed-link {
speed = <1000>;
full-duplex;
@@ -146,6 +148,8 @@ examples:
reg = <6>;
label = "cpu";
ethernet = <ð0>;
+ phy-mode = "rgmii";
+
fixed-link {
speed = <1000>;
full-duplex;
diff --git a/Documentation/devicetree/bindings/net/dsa/renesas,rzn1-a5psw.yaml b/Documentation/devicetree/bindings/net/dsa/renesas,rzn1-a5psw.yaml
index 4d428f5ad044ba05ade0d5df9de6a5ff5e14c4c4..14a1f0b4c32b3fb6003b9d35acb6bd58d04744a5 100644
--- a/Documentation/devicetree/bindings/net/dsa/renesas,rzn1-a5psw.yaml
+++ b/Documentation/devicetree/bindings/net/dsa/renesas,rzn1-a5psw.yaml
@@ -131,6 +131,8 @@ examples:
reg = <4>;
ethernet = <&gmac2>;
label = "cpu";
+ phy-mode = "internal";
+
fixed-link {
speed = <1000>;
full-duplex;
diff --git a/drivers/of/base.c b/drivers/of/base.c
index 7fa960bd3df16addf7e026cc0741d60e6ddbc892..42da760e0f45d92cca93224d78fa9d20c5812dd9 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -578,6 +578,7 @@ int of_device_compatible_match(struct device_node *device,
return score;
}
+EXPORT_SYMBOL_GPL(of_device_compatible_match);
/**
* of_machine_is_compatible - Test root of device tree for a given compatible value
diff --git a/net/dsa/dsa2.c b/net/dsa/dsa2.c
index cac48a741f27c419f68a2258c0ff0a254687db55..055a6d1d43727413ebfaf483f0f82d49c876caf9 100644
--- a/net/dsa/dsa2.c
+++ b/net/dsa/dsa2.c
@@ -469,10 +469,16 @@ static int dsa_port_setup(struct dsa_port *dp)
dsa_port_disable(dp);
break;
case DSA_PORT_TYPE_CPU:
- err = dsa_port_link_register_of(dp);
- if (err)
- break;
- dsa_port_link_registered = true;
+ if (dp->dn) {
+ err = dsa_shared_port_link_register_of(dp);
+ if (err)
+ break;
+ dsa_port_link_registered = true;
+ } else {
+ dev_warn(ds->dev,
+ "skipping link registration for CPU port %d\n",
+ dp->index);
+ }
err = dsa_port_enable(dp, NULL);
if (err)
@@ -481,10 +487,16 @@ static int dsa_port_setup(struct dsa_port *dp)
break;
case DSA_PORT_TYPE_DSA:
- err = dsa_port_link_register_of(dp);
- if (err)
- break;
- dsa_port_link_registered = true;
+ if (dp->dn) {
+ err = dsa_shared_port_link_register_of(dp);
+ if (err)
+ break;
+ dsa_port_link_registered = true;
+ } else {
+ dev_warn(ds->dev,
+ "skipping link registration for DSA port %d\n",
+ dp->index);
+ }
err = dsa_port_enable(dp, NULL);
if (err)
@@ -505,7 +517,7 @@ static int dsa_port_setup(struct dsa_port *dp)
if (err && dsa_port_enabled)
dsa_port_disable(dp);
if (err && dsa_port_link_registered)
- dsa_port_link_unregister_of(dp);
+ dsa_shared_port_link_unregister_of(dp);
if (err) {
if (ds->ops->port_teardown)
ds->ops->port_teardown(ds, dp->index);
@@ -577,11 +589,13 @@ static void dsa_port_teardown(struct dsa_port *dp)
break;
case DSA_PORT_TYPE_CPU:
dsa_port_disable(dp);
- dsa_port_link_unregister_of(dp);
+ if (dp->dn)
+ dsa_shared_port_link_unregister_of(dp);
break;
case DSA_PORT_TYPE_DSA:
dsa_port_disable(dp);
- dsa_port_link_unregister_of(dp);
+ if (dp->dn)
+ dsa_shared_port_link_unregister_of(dp);
break;
case DSA_PORT_TYPE_USER:
if (dp->slave) {
diff --git a/net/dsa/dsa_priv.h b/net/dsa/dsa_priv.h
index d9722e49864b06176fa781706e3f76c57f3bff3e..8924366467e094b55c323c80311d8a228e20689c 100644
--- a/net/dsa/dsa_priv.h
+++ b/net/dsa/dsa_priv.h
@@ -285,8 +285,8 @@ int dsa_port_mrp_add_ring_role(const struct dsa_port *dp,
int dsa_port_mrp_del_ring_role(const struct dsa_port *dp,
const struct switchdev_obj_ring_role_mrp *mrp);
int dsa_port_phylink_create(struct dsa_port *dp);
-int dsa_port_link_register_of(struct dsa_port *dp);
-void dsa_port_link_unregister_of(struct dsa_port *dp);
+int dsa_shared_port_link_register_of(struct dsa_port *dp);
+void dsa_shared_port_link_unregister_of(struct dsa_port *dp);
int dsa_port_hsr_join(struct dsa_port *dp, struct net_device *hsr);
void dsa_port_hsr_leave(struct dsa_port *dp, struct net_device *hsr);
int dsa_port_tag_8021q_vlan_add(struct dsa_port *dp, u16 vid, bool broadcast);
diff --git a/net/dsa/port.c b/net/dsa/port.c
index a8895ee3cd600ca8cfd1cc88a6614a910cc76b7f..7afc35db0c29c0cb4c70294e2ea1963f4e2ab9cb 100644
--- a/net/dsa/port.c
+++ b/net/dsa/port.c
@@ -1555,7 +1555,7 @@ int dsa_port_phylink_create(struct dsa_port *dp)
return 0;
}
-static int dsa_port_setup_phy_of(struct dsa_port *dp, bool enable)
+static int dsa_shared_port_setup_phy_of(struct dsa_port *dp, bool enable)
{
struct dsa_switch *ds = dp->ds;
struct phy_device *phydev;
@@ -1593,7 +1593,7 @@ static int dsa_port_setup_phy_of(struct dsa_port *dp, bool enable)
return err;
}
-static int dsa_port_fixed_link_register_of(struct dsa_port *dp)
+static int dsa_shared_port_fixed_link_register_of(struct dsa_port *dp)
{
struct device_node *dn = dp->dn;
struct dsa_switch *ds = dp->ds;
@@ -1627,7 +1627,7 @@ static int dsa_port_fixed_link_register_of(struct dsa_port *dp)
return 0;
}
-static int dsa_port_phylink_register(struct dsa_port *dp)
+static int dsa_shared_port_phylink_register(struct dsa_port *dp)
{
struct dsa_switch *ds = dp->ds;
struct device_node *port_dn = dp->dn;
@@ -1653,22 +1653,184 @@ static int dsa_port_phylink_register(struct dsa_port *dp)
return err;
}
-int dsa_port_link_register_of(struct dsa_port *dp)
+/* During the initial DSA driver migration to OF, port nodes were sometimes
+ * added to device trees with no indication of how they should operate from a
+ * link management perspective (phy-handle, fixed-link, etc). Additionally, the
+ * phy-mode may be absent. The interpretation of these port OF nodes depends on
+ * their type.
+ *
+ * User ports with no phy-handle or fixed-link are expected to connect to an
+ * internal PHY located on the ds->slave_mii_bus at an MDIO address equal to
+ * the port number. This description is still actively supported.
+ *
+ * Shared (CPU and DSA) ports with no phy-handle or fixed-link are expected to
+ * operate at the maximum speed that their phy-mode is capable of. If the
+ * phy-mode is absent, they are expected to operate using the phy-mode
+ * supported by the port that gives the highest link speed. It is unspecified
+ * if the port should use flow control or not, half duplex or full duplex, or
+ * if the phy-mode is a SERDES link, whether in-band autoneg is expected to be
+ * enabled or not.
+ *
+ * In the latter case of shared ports, omitting the link management description
+ * from the firmware node is deprecated and strongly discouraged. DSA uses
+ * phylink, which rejects the firmware nodes of these ports for lacking
+ * required properties.
+ *
+ * For switches in this table, DSA will skip enforcing validation and will
+ * later omit registering a phylink instance for the shared ports, if they lack
+ * a fixed-link, a phy-handle, or a managed = "in-band-status" property.
+ * It becomes the responsibility of the driver to ensure that these ports
+ * operate at the maximum speed (whatever this means) and will interoperate
+ * with the DSA master or other cascade port, since phylink methods will not be
+ * invoked for them.
+ *
+ * If you are considering expanding this table for newly introduced switches,
+ * think again. It is OK to remove switches from this table if there aren't DT
+ * blobs in circulation which rely on defaulting the shared ports.
+ */
+static const char * const dsa_switches_apply_workarounds[] = {
+#if IS_ENABLED(CONFIG_NET_DSA_XRS700X)
+ "arrow,xrs7003e",
+ "arrow,xrs7003f",
+ "arrow,xrs7004e",
+ "arrow,xrs7004f",
+#endif
+#if IS_ENABLED(CONFIG_B53)
+ "brcm,bcm5325",
+ "brcm,bcm53115",
+ "brcm,bcm53125",
+ "brcm,bcm53128",
+ "brcm,bcm5365",
+ "brcm,bcm5389",
+ "brcm,bcm5395",
+ "brcm,bcm5397",
+ "brcm,bcm5398",
+ "brcm,bcm53010-srab",
+ "brcm,bcm53011-srab",
+ "brcm,bcm53012-srab",
+ "brcm,bcm53018-srab",
+ "brcm,bcm53019-srab",
+ "brcm,bcm5301x-srab",
+ "brcm,bcm11360-srab",
+ "brcm,bcm58522-srab",
+ "brcm,bcm58525-srab",
+ "brcm,bcm58535-srab",
+ "brcm,bcm58622-srab",
+ "brcm,bcm58623-srab",
+ "brcm,bcm58625-srab",
+ "brcm,bcm88312-srab",
+ "brcm,cygnus-srab",
+ "brcm,nsp-srab",
+ "brcm,omega-srab",
+ "brcm,bcm3384-switch",
+ "brcm,bcm6328-switch",
+ "brcm,bcm6368-switch",
+ "brcm,bcm63xx-switch",
+#endif
+#if IS_ENABLED(CONFIG_NET_DSA_BCM_SF2)
+ "brcm,bcm7445-switch-v4.0",
+ "brcm,bcm7278-switch-v4.0",
+ "brcm,bcm7278-switch-v4.8",
+#endif
+#if IS_ENABLED(CONFIG_NET_DSA_LANTIQ_GSWIP)
+ "lantiq,xrx200-gswip",
+ "lantiq,xrx300-gswip",
+ "lantiq,xrx330-gswip",
+#endif
+#if IS_ENABLED(CONFIG_NET_DSA_MV88E6060)
+ "marvell,mv88e6060",
+#endif
+#if IS_ENABLED(CONFIG_NET_DSA_MV88E6XXX)
+ "marvell,mv88e6085",
+ "marvell,mv88e6190",
+ "marvell,mv88e6250",
+#endif
+#if IS_ENABLED(CONFIG_NET_DSA_MICROCHIP_KSZ_COMMON)
+ "microchip,ksz8765",
+ "microchip,ksz8794",
+ "microchip,ksz8795",
+ "microchip,ksz8863",
+ "microchip,ksz8873",
+ "microchip,ksz9477",
+ "microchip,ksz9897",
+ "microchip,ksz9893",
+ "microchip,ksz9563",
+ "microchip,ksz8563",
+ "microchip,ksz9567",
+#endif
+#if IS_ENABLED(CONFIG_NET_DSA_SMSC_LAN9303_MDIO)
+ "smsc,lan9303-mdio",
+#endif
+#if IS_ENABLED(CONFIG_NET_DSA_SMSC_LAN9303_I2C)
+ "smsc,lan9303-i2c",
+#endif
+ NULL,
+};
+
+static void dsa_shared_port_validate_of(struct dsa_port *dp,
+ bool *missing_phy_mode,
+ bool *missing_link_description)
{
+ struct device_node *dn = dp->dn, *phy_np;
struct dsa_switch *ds = dp->ds;
- struct device_node *phy_np;
+ phy_interface_t mode;
+
+ *missing_phy_mode = false;
+ *missing_link_description = false;
+
+ if (of_get_phy_mode(dn, &mode)) {
+ *missing_phy_mode = true;
+ dev_err(ds->dev,
+ "OF node %pOF of %s port %d lacks the required \"phy-mode\" property\n",
+ dn, dsa_port_is_cpu(dp) ? "CPU" : "DSA", dp->index);
+ }
+
+ /* Note: of_phy_is_fixed_link() also returns true for
+ * managed = "in-band-status"
+ */
+ if (of_phy_is_fixed_link(dn))
+ return;
+
+ phy_np = of_parse_phandle(dn, "phy-handle", 0);
+ if (phy_np) {
+ of_node_put(phy_np);
+ return;
+ }
+
+ *missing_link_description = true;
+
+ dev_err(ds->dev,
+ "OF node %pOF of %s port %d lacks the required \"phy-handle\", \"fixed-link\" or \"managed\" properties\n",
+ dn, dsa_port_is_cpu(dp) ? "CPU" : "DSA", dp->index);
+}
+
+int dsa_shared_port_link_register_of(struct dsa_port *dp)
+{
+ struct dsa_switch *ds = dp->ds;
+ bool missing_link_description;
+ bool missing_phy_mode;
int port = dp->index;
+ dsa_shared_port_validate_of(dp, &missing_phy_mode,
+ &missing_link_description);
+
+ if ((missing_phy_mode || missing_link_description) &&
+ !of_device_compatible_match(ds->dev->of_node,
+ dsa_switches_apply_workarounds))
+ return -EINVAL;
+
if (!ds->ops->adjust_link) {
- phy_np = of_parse_phandle(dp->dn, "phy-handle", 0);
- if (of_phy_is_fixed_link(dp->dn) || phy_np) {
+ if (missing_link_description) {
+ dev_warn(ds->dev,
+ "Skipping phylink registration for %s port %d\n",
+ dsa_port_is_cpu(dp) ? "CPU" : "DSA", dp->index);
+ } else {
if (ds->ops->phylink_mac_link_down)
ds->ops->phylink_mac_link_down(ds, port,
MLO_AN_FIXED, PHY_INTERFACE_MODE_NA);
- of_node_put(phy_np);
- return dsa_port_phylink_register(dp);
+
+ return dsa_shared_port_phylink_register(dp);
}
- of_node_put(phy_np);
return 0;
}
@@ -1676,12 +1838,12 @@ int dsa_port_link_register_of(struct dsa_port *dp)
"Using legacy PHYLIB callbacks. Please migrate to PHYLINK!\n");
if (of_phy_is_fixed_link(dp->dn))
- return dsa_port_fixed_link_register_of(dp);
+ return dsa_shared_port_fixed_link_register_of(dp);
else
- return dsa_port_setup_phy_of(dp, true);
+ return dsa_shared_port_setup_phy_of(dp, true);
}
-void dsa_port_link_unregister_of(struct dsa_port *dp)
+void dsa_shared_port_link_unregister_of(struct dsa_port *dp)
{
struct dsa_switch *ds = dp->ds;
@@ -1697,7 +1859,7 @@ void dsa_port_link_unregister_of(struct dsa_port *dp)
if (of_phy_is_fixed_link(dp->dn))
of_phy_deregister_fixed_link(dp->dn);
else
- dsa_port_setup_phy_of(dp, false);
+ dsa_shared_port_setup_phy_of(dp, false);
}
int dsa_port_hsr_join(struct dsa_port *dp, struct net_device *hsr)