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Date:   Tue, 13 Oct 2020 16:13:02 +0200
From:   Jiri Pirko <jiri@...nulli.us>
To:     Vladimir Oltean <vladimir.oltean@....com>
Cc:     netdev@...r.kernel.org, alexandre.belloni@...tlin.com,
        andrew@...n.ch, f.fainelli@...il.com, vivien.didelot@...il.com,
        alexandru.marginean@....com, claudiu.manoil@....com,
        xiaoliang.yang_1@....com, hongbo.wang@....com, kuba@...nel.org,
        idosch@...sch.org, UNGLinuxDriver@...rochip.com
Subject: Re: [RFC PATCH 08/10] net: mscc: ocelot: register devlink ports

Tue, Oct 13, 2020 at 03:48:47PM CEST, vladimir.oltean@....com wrote:
>Add devlink integration into the mscc_ocelot switchdev driver. Only the
>probed interfaces are registered with devlink, because for convenience,
>struct devlink_port was included into struct ocelot_port_private, which
>is only initialized for the ports that are used.
>
>Note that the felix DSA driver is already integrated with devlink by
>default, since that is a thing that the DSA core takes care of.
>
>Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
>---
> drivers/net/ethernet/mscc/ocelot.h         |  4 +
> drivers/net/ethernet/mscc/ocelot_net.c     | 92 ++++++++++++++++++++++
> drivers/net/ethernet/mscc/ocelot_vsc7514.c |  7 ++
> include/soc/mscc/ocelot.h                  |  1 +
> 4 files changed, 104 insertions(+)
>
>diff --git a/drivers/net/ethernet/mscc/ocelot.h b/drivers/net/ethernet/mscc/ocelot.h
>index 8eae68e0fd0b..3fee5f565920 100644
>--- a/drivers/net/ethernet/mscc/ocelot.h
>+++ b/drivers/net/ethernet/mscc/ocelot.h
>@@ -65,6 +65,8 @@ struct ocelot_port_private {
> 	struct phy *serdes;
> 
> 	struct ocelot_port_tc tc;
>+
>+	struct devlink_port devlink_port;
> };
> 
> struct ocelot_dump_ctx {
>@@ -106,6 +108,8 @@ void ocelot_port_writel(struct ocelot_port *port, u32 val, u32 reg);
> 
> int ocelot_probe_port(struct ocelot *ocelot, int port, struct regmap *target,
> 		      struct phy_device *phy);
>+int ocelot_devlink_init(struct ocelot *ocelot);
>+void ocelot_devlink_teardown(struct ocelot *ocelot);
> 
> extern struct notifier_block ocelot_netdevice_nb;
> extern struct notifier_block ocelot_switchdev_nb;
>diff --git a/drivers/net/ethernet/mscc/ocelot_net.c b/drivers/net/ethernet/mscc/ocelot_net.c
>index d3c03942546d..a11e5e7a0228 100644
>--- a/drivers/net/ethernet/mscc/ocelot_net.c
>+++ b/drivers/net/ethernet/mscc/ocelot_net.c
>@@ -8,6 +8,98 @@
> #include "ocelot.h"
> #include "ocelot_vcap.h"
> 
>+struct ocelot_devlink_private {
>+	struct ocelot *ocelot;
>+};
>+
>+static const struct devlink_ops ocelot_devlink_ops = {
>+};
>+
>+static int ocelot_port_devlink_init(struct ocelot *ocelot, int port)
>+{
>+	struct ocelot_port *ocelot_port = ocelot->ports[port];
>+	struct devlink *dl = ocelot->devlink;
>+	struct devlink_port_attrs attrs = {};
>+	struct ocelot_port_private *priv;
>+	struct devlink_port *dlp;
>+
>+	if (!ocelot_port)
>+		return 0;
>+
>+	priv = container_of(ocelot_port, struct ocelot_port_private, port);
>+	dlp = &priv->devlink_port;
>+
>+	attrs.phys.port_number = port;
>+
>+	if (priv->dev)
>+		attrs.flavour = DEVLINK_PORT_FLAVOUR_PHYSICAL;
>+	else
>+		attrs.flavour = DEVLINK_PORT_FLAVOUR_UNUSED;
>+
>+	devlink_port_attrs_set(dlp, &attrs);
>+
>+	return devlink_port_register(dl, dlp, port);

You are missing devlink_port_type_eth_set()


>+}
>+
>+static void ocelot_port_devlink_teardown(struct ocelot *ocelot, int port)
>+{
>+	struct ocelot_port *ocelot_port = ocelot->ports[port];
>+	struct ocelot_port_private *priv;
>+	struct devlink_port *dlp;
>+
>+	if (!ocelot_port)
>+		return;
>+
>+	priv = container_of(ocelot_port, struct ocelot_port_private, port);
>+	dlp = &priv->devlink_port;
>+
>+	devlink_port_unregister(dlp);
>+}
>+
>+int ocelot_devlink_init(struct ocelot *ocelot)
>+{
>+	struct ocelot_devlink_private *dl_priv;
>+	int port, err;
>+
>+	ocelot->devlink = devlink_alloc(&ocelot_devlink_ops, sizeof(*dl_priv));
>+	if (!ocelot->devlink)
>+		return -ENOMEM;
>+	dl_priv = devlink_priv(ocelot->devlink);
>+	dl_priv->ocelot = ocelot;
>+
>+	err = devlink_register(ocelot->devlink, ocelot->dev);

>+	if (err)
>+		goto free_devlink;
>+
>+	for (port = 0; port < ocelot->num_phys_ports; port++) {
>+		err = ocelot_port_devlink_init(ocelot, port);
>+		if (err) {
>+			while (port-- > 0)
>+				ocelot_port_devlink_teardown(ocelot, port);
>+			goto unregister_devlink;
>+		}
>+	}
>+
>+	return 0;
>+
>+unregister_devlink:
>+	devlink_unregister(ocelot->devlink);
>+free_devlink:
>+	devlink_free(ocelot->devlink);
>+	return err;
>+}
>+
>+void ocelot_devlink_teardown(struct ocelot *ocelot)
>+{
>+	int port;
>+
>+	for (port = 0; port < ocelot->num_phys_ports; port++)
>+		ocelot_port_devlink_teardown(ocelot, port);
>+
>+	devlink_unregister(ocelot->devlink);
>+	devlink_free(ocelot->devlink);
>+}
>+
> int ocelot_setup_tc_cls_flower(struct ocelot_port_private *priv,
> 			       struct flow_cls_offload *f,
> 			       bool ingress)
>diff --git a/drivers/net/ethernet/mscc/ocelot_vsc7514.c b/drivers/net/ethernet/mscc/ocelot_vsc7514.c
>index ea55f4d20ecc..6512ddeafd50 100644
>--- a/drivers/net/ethernet/mscc/ocelot_vsc7514.c
>+++ b/drivers/net/ethernet/mscc/ocelot_vsc7514.c
>@@ -1292,6 +1292,12 @@ static int mscc_ocelot_probe(struct platform_device *pdev)
> 		}
> 	}
> 
>+	err = ocelot_devlink_init(ocelot);
>+	if (err) {
>+		mscc_ocelot_release_ports(ocelot);
>+		goto out_put_ports;
>+	}
>+
> 	register_netdevice_notifier(&ocelot_netdevice_nb);
> 	register_switchdev_notifier(&ocelot_switchdev_nb);
> 	register_switchdev_blocking_notifier(&ocelot_switchdev_blocking_nb);
>@@ -1307,6 +1313,7 @@ static int mscc_ocelot_remove(struct platform_device *pdev)
> {
> 	struct ocelot *ocelot = platform_get_drvdata(pdev);
> 
>+	ocelot_devlink_teardown(ocelot);
> 	ocelot_deinit_timestamp(ocelot);
> 	mscc_ocelot_release_ports(ocelot);
> 	ocelot_deinit(ocelot);
>diff --git a/include/soc/mscc/ocelot.h b/include/soc/mscc/ocelot.h
>index c6153c73dbfe..19ce7ea11163 100644
>--- a/include/soc/mscc/ocelot.h
>+++ b/include/soc/mscc/ocelot.h
>@@ -599,6 +599,7 @@ struct ocelot_port {
> 
> struct ocelot {
> 	struct device			*dev;
>+	struct devlink			*devlink;
> 
> 	const struct ocelot_ops		*ops;
> 	struct regmap			*targets[TARGET_MAX];
>-- 
>2.25.1
>

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