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Date: Fri, 25 Sep 2020 15:53:27 +0200
From: Alexandre Belloni <alexandre.belloni@...tlin.com>
To: Vladimir Oltean <vladimir.oltean@....com>
Cc: davem@...emloft.net, andrew@...n.ch, f.fainelli@...il.com,
vivien.didelot@...il.com, horatiu.vultur@...rochip.com,
joergen.andreasen@...rochip.com, allan.nielsen@...rochip.com,
alexandru.marginean@....com, claudiu.manoil@....com,
netdev@...r.kernel.org, UNGLinuxDriver@...rochip.com
Subject: Re: [RFC PATCH net-next 07/14] net: mscc: ocelot: introduce
conversion helpers between port and netdev
On 25/09/2020 15:18:48+0300, Vladimir Oltean wrote:
> Since the mscc_ocelot_switch_lib is common between a pure switchdev and
> a DSA driver, the procedure of retrieving a net_device for a certain
> port index differs, as those are registered by their individual
> front-ends.
>
> Up to now that has been dealt with by always passing the port index to
> the switch library, but now, we're going to need to work with net_device
> pointers from the tc-flower offload, for things like indev, or mirred.
> It is not desirable to refactor that, so let's make sure that the flower
> offload core has the ability to translate between a net_device and a
> port index properly.
>
> Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
Acked-by: Alexandre Belloni <alexandre.belloni@...tlin.com>
> ---
> drivers/net/dsa/ocelot/felix.c | 22 ++++++++++++++++
> drivers/net/dsa/ocelot/felix.h | 3 +++
> drivers/net/dsa/ocelot/felix_vsc9959.c | 2 ++
> drivers/net/dsa/ocelot/seville_vsc9953.c | 2 ++
> drivers/net/ethernet/mscc/ocelot.h | 2 ++
> drivers/net/ethernet/mscc/ocelot_net.c | 30 ++++++++++++++++++++++
> drivers/net/ethernet/mscc/ocelot_vsc7514.c | 2 ++
> include/soc/mscc/ocelot.h | 2 ++
> 8 files changed, 65 insertions(+)
>
> diff --git a/drivers/net/dsa/ocelot/felix.c b/drivers/net/dsa/ocelot/felix.c
> index 8ebdebc44c72..a0b803fdbac8 100644
> --- a/drivers/net/dsa/ocelot/felix.c
> +++ b/drivers/net/dsa/ocelot/felix.c
> @@ -810,3 +810,25 @@ const struct dsa_switch_ops felix_switch_ops = {
> .cls_flower_stats = felix_cls_flower_stats,
> .port_setup_tc = felix_port_setup_tc,
> };
> +
> +struct net_device *felix_port_to_netdev(struct ocelot *ocelot, int port)
> +{
> + struct felix *felix = ocelot_to_felix(ocelot);
> + struct dsa_switch *ds = felix->ds;
> +
> + if (!dsa_is_user_port(ds, port))
> + return NULL;
> +
> + return dsa_to_port(ds, port)->slave;
> +}
> +
> +int felix_netdev_to_port(struct net_device *dev)
> +{
> + struct dsa_port *dp;
> +
> + dp = dsa_port_from_netdev(dev);
> + if (IS_ERR(dp))
> + return -EINVAL;
> +
> + return dp->index;
> +}
> diff --git a/drivers/net/dsa/ocelot/felix.h b/drivers/net/dsa/ocelot/felix.h
> index 6f6383904cc9..83bab486c61a 100644
> --- a/drivers/net/dsa/ocelot/felix.h
> +++ b/drivers/net/dsa/ocelot/felix.h
> @@ -51,4 +51,7 @@ struct felix {
> resource_size_t imdio_base;
> };
>
> +struct net_device *felix_port_to_netdev(struct ocelot *ocelot, int port);
> +int felix_netdev_to_port(struct net_device *dev);
> +
> #endif
> diff --git a/drivers/net/dsa/ocelot/felix_vsc9959.c b/drivers/net/dsa/ocelot/felix_vsc9959.c
> index 601853e05754..66e991ab9df5 100644
> --- a/drivers/net/dsa/ocelot/felix_vsc9959.c
> +++ b/drivers/net/dsa/ocelot/felix_vsc9959.c
> @@ -867,6 +867,8 @@ static u16 vsc9959_wm_enc(u16 value)
> static const struct ocelot_ops vsc9959_ops = {
> .reset = vsc9959_reset,
> .wm_enc = vsc9959_wm_enc,
> + .port_to_netdev = felix_port_to_netdev,
> + .netdev_to_port = felix_netdev_to_port,
> };
>
> static int vsc9959_mdio_bus_alloc(struct ocelot *ocelot)
> diff --git a/drivers/net/dsa/ocelot/seville_vsc9953.c b/drivers/net/dsa/ocelot/seville_vsc9953.c
> index b921ad98e90a..87ca36c77606 100644
> --- a/drivers/net/dsa/ocelot/seville_vsc9953.c
> +++ b/drivers/net/dsa/ocelot/seville_vsc9953.c
> @@ -920,6 +920,8 @@ static u16 vsc9953_wm_enc(u16 value)
> static const struct ocelot_ops vsc9953_ops = {
> .reset = vsc9953_reset,
> .wm_enc = vsc9953_wm_enc,
> + .port_to_netdev = felix_port_to_netdev,
> + .netdev_to_port = felix_netdev_to_port,
> };
>
> static int vsc9953_mdio_bus_alloc(struct ocelot *ocelot)
> diff --git a/drivers/net/ethernet/mscc/ocelot.h b/drivers/net/ethernet/mscc/ocelot.h
> index dc29e05103a1..abb407dff93c 100644
> --- a/drivers/net/ethernet/mscc/ocelot.h
> +++ b/drivers/net/ethernet/mscc/ocelot.h
> @@ -98,6 +98,8 @@ int ocelot_port_lag_join(struct ocelot *ocelot, int port,
> struct net_device *bond);
> void ocelot_port_lag_leave(struct ocelot *ocelot, int port,
> struct net_device *bond);
> +struct net_device *ocelot_port_to_netdev(struct ocelot *ocelot, int port);
> +int ocelot_netdev_to_port(struct net_device *dev);
>
> u32 ocelot_port_readl(struct ocelot_port *port, u32 reg);
> void ocelot_port_writel(struct ocelot_port *port, u32 val, u32 reg);
> diff --git a/drivers/net/ethernet/mscc/ocelot_net.c b/drivers/net/ethernet/mscc/ocelot_net.c
> index 028a0150f97d..64e619f0f5b2 100644
> --- a/drivers/net/ethernet/mscc/ocelot_net.c
> +++ b/drivers/net/ethernet/mscc/ocelot_net.c
> @@ -656,6 +656,36 @@ static const struct net_device_ops ocelot_port_netdev_ops = {
> .ndo_do_ioctl = ocelot_ioctl,
> };
>
> +struct net_device *ocelot_port_to_netdev(struct ocelot *ocelot, int port)
> +{
> + struct ocelot_port *ocelot_port = ocelot->ports[port];
> + struct ocelot_port_private *priv;
> +
> + if (!ocelot_port)
> + return NULL;
> +
> + priv = container_of(ocelot_port, struct ocelot_port_private, port);
> +
> + return priv->dev;
> +}
> +
> +static bool ocelot_port_dev_check(const struct net_device *dev)
> +{
> + return dev->netdev_ops == &ocelot_port_netdev_ops;
> +}
> +
> +int ocelot_netdev_to_port(struct net_device *dev)
> +{
> + struct ocelot_port_private *priv;
> +
> + if (!dev || !ocelot_port_dev_check(dev))
> + return -EINVAL;
> +
> + priv = netdev_priv(dev);
> +
> + return priv->chip_port;
> +}
> +
> static void ocelot_port_get_strings(struct net_device *netdev, u32 sset,
> u8 *data)
> {
> diff --git a/drivers/net/ethernet/mscc/ocelot_vsc7514.c b/drivers/net/ethernet/mscc/ocelot_vsc7514.c
> index 5a93f7a76ade..a7f53fc6f746 100644
> --- a/drivers/net/ethernet/mscc/ocelot_vsc7514.c
> +++ b/drivers/net/ethernet/mscc/ocelot_vsc7514.c
> @@ -757,6 +757,8 @@ static u16 ocelot_wm_enc(u16 value)
> static const struct ocelot_ops ocelot_ops = {
> .reset = ocelot_reset,
> .wm_enc = ocelot_wm_enc,
> + .port_to_netdev = ocelot_port_to_netdev,
> + .netdev_to_port = ocelot_netdev_to_port,
> };
>
> static const struct vcap_field vsc7514_vcap_is2_keys[] = {
> diff --git a/include/soc/mscc/ocelot.h b/include/soc/mscc/ocelot.h
> index 45c7dc7b54b6..9706206125a7 100644
> --- a/include/soc/mscc/ocelot.h
> +++ b/include/soc/mscc/ocelot.h
> @@ -546,6 +546,8 @@ enum ocelot_tag_prefix {
> struct ocelot;
>
> struct ocelot_ops {
> + struct net_device *(*port_to_netdev)(struct ocelot *ocelot, int port);
> + int (*netdev_to_port)(struct net_device *dev);
> int (*reset)(struct ocelot *ocelot);
> u16 (*wm_enc)(u16 value);
> };
> --
> 2.25.1
>
--
Alexandre Belloni, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
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