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Date: Fri, 1 Mar 2019 13:45:26 +0100
From: Michal Kubecek <mkubecek@...e.cz>
To: Jiri Pirko <jiri@...nulli.us>
Cc: netdev@...r.kernel.org, davem@...emloft.net, mlxsw@...lanox.com,
idosch@...lanox.com, jakub.kicinski@...ronome.com,
dirk.vandermerwe@...ronome.com, f.fainelli@...il.com,
andrew@...n.ch, vivien.didelot@...il.com
Subject: Re: [patch net-next 1/5] net: replace ndo_get_devlink for
ndo_get_devlink_port
On Fri, Mar 01, 2019 at 09:13:58AM +0100, Jiri Pirko wrote:
> From: Jiri Pirko <jiri@...lanox.com>
>
> Follow-up patch is going to need a devlink port instance according to
> a netdev. Devlink port instance should be always available when devlink
> is used.
I noticed netdevsim has devlink interface but it does not register
devlink ports for its network devices. But that seems to be rather an
omission in netdevsim, right?
> So change the recently introduced ndo_get_devlink to
> ndo_get_devlink_port. With that, adjust the wrapper for the only
> user to get devlink pointer.
>
> Signed-off-by: Jiri Pirko <jiri@...lanox.com>
Reviewed-by: Michal Kubecek <mkubecek@...e.cz>
> ---
> drivers/net/ethernet/netronome/nfp/nfp_app.h | 2 +-
> drivers/net/ethernet/netronome/nfp/nfp_devlink.c | 10 +++++-----
> drivers/net/ethernet/netronome/nfp/nfp_net_common.c | 2 +-
> drivers/net/ethernet/netronome/nfp/nfp_net_repr.c | 2 +-
> include/linux/netdevice.h | 6 +++---
> include/net/devlink.h | 16 +++++++++++++---
> 6 files changed, 24 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/net/ethernet/netronome/nfp/nfp_app.h b/drivers/net/ethernet/netronome/nfp/nfp_app.h
> index f8d422713705..a6fda07fce43 100644
> --- a/drivers/net/ethernet/netronome/nfp/nfp_app.h
> +++ b/drivers/net/ethernet/netronome/nfp/nfp_app.h
> @@ -433,6 +433,6 @@ int nfp_app_nic_vnic_alloc(struct nfp_app *app, struct nfp_net *nn,
> int nfp_app_nic_vnic_init_phy_port(struct nfp_pf *pf, struct nfp_app *app,
> struct nfp_net *nn, unsigned int id);
>
> -struct devlink *nfp_devlink_get_devlink(struct net_device *netdev);
> +struct devlink_port *nfp_devlink_get_devlink_port(struct net_device *netdev);
>
> #endif
> diff --git a/drivers/net/ethernet/netronome/nfp/nfp_devlink.c b/drivers/net/ethernet/netronome/nfp/nfp_devlink.c
> index e9eca99cf493..f24a7fc11b9f 100644
> --- a/drivers/net/ethernet/netronome/nfp/nfp_devlink.c
> +++ b/drivers/net/ethernet/netronome/nfp/nfp_devlink.c
> @@ -377,13 +377,13 @@ void nfp_devlink_port_unregister(struct nfp_port *port)
> devlink_port_unregister(&port->dl_port);
> }
>
> -struct devlink *nfp_devlink_get_devlink(struct net_device *netdev)
> +struct devlink_port *nfp_devlink_get_devlink_port(struct net_device *netdev)
> {
> - struct nfp_app *app;
> + struct nfp_port *port;
>
> - app = nfp_app_from_netdev(netdev);
> - if (!app)
> + port = nfp_port_from_netdev(netdev);
> + if (!port)
> return NULL;
>
> - return priv_to_devlink(app->pf);
> + return &port->dl_port;
> }
> diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
> index 6d1b8816552e..7dd6b3fbb394 100644
> --- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
> +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
> @@ -3531,7 +3531,7 @@ const struct net_device_ops nfp_net_netdev_ops = {
> .ndo_udp_tunnel_del = nfp_net_del_vxlan_port,
> .ndo_bpf = nfp_net_xdp,
> .ndo_get_port_parent_id = nfp_port_get_port_parent_id,
> - .ndo_get_devlink = nfp_devlink_get_devlink,
> + .ndo_get_devlink_port = nfp_devlink_get_devlink_port,
> };
>
> /**
> diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_repr.c b/drivers/net/ethernet/netronome/nfp/nfp_net_repr.c
> index d2c803bb4e56..bf621674f583 100644
> --- a/drivers/net/ethernet/netronome/nfp/nfp_net_repr.c
> +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_repr.c
> @@ -273,7 +273,7 @@ const struct net_device_ops nfp_repr_netdev_ops = {
> .ndo_set_features = nfp_port_set_features,
> .ndo_set_mac_address = eth_mac_addr,
> .ndo_get_port_parent_id = nfp_port_get_port_parent_id,
> - .ndo_get_devlink = nfp_devlink_get_devlink,
> + .ndo_get_devlink_port = nfp_devlink_get_devlink_port,
> };
>
> void
> diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
> index c10b60297d28..dc9d72b8932a 100644
> --- a/include/linux/netdevice.h
> +++ b/include/linux/netdevice.h
> @@ -1251,8 +1251,8 @@ struct devlink;
> * that got dropped are freed/returned via xdp_return_frame().
> * Returns negative number, means general error invoking ndo, meaning
> * no frames were xmit'ed and core-caller will free all frames.
> - * struct devlink *(*ndo_get_devlink)(struct net_device *dev);
> - * Get devlink instance associated with a given netdev.
> + * struct devlink_port *(*ndo_get_devlink_port)(struct net_device *dev);
> + * Get devlink port instance associated with a given netdev.
> * Called with a reference on the netdevice and devlink locks only,
> * rtnl_lock is not held.
> */
> @@ -1453,7 +1453,7 @@ struct net_device_ops {
> u32 flags);
> int (*ndo_xsk_async_xmit)(struct net_device *dev,
> u32 queue_id);
> - struct devlink * (*ndo_get_devlink)(struct net_device *dev);
> + struct devlink_port * (*ndo_get_devlink_port)(struct net_device *dev);
> };
>
> /**
> diff --git a/include/net/devlink.h b/include/net/devlink.h
> index 7f5a0bdca228..f34107def48e 100644
> --- a/include/net/devlink.h
> +++ b/include/net/devlink.h
> @@ -538,15 +538,25 @@ static inline struct devlink *priv_to_devlink(void *priv)
> return container_of(priv, struct devlink, priv);
> }
>
> -static inline struct devlink *netdev_to_devlink(struct net_device *dev)
> +static inline struct devlink_port *
> +netdev_to_devlink_port(struct net_device *dev)
> {
> #if IS_ENABLED(CONFIG_NET_DEVLINK)
> - if (dev->netdev_ops->ndo_get_devlink)
> - return dev->netdev_ops->ndo_get_devlink(dev);
> + if (dev->netdev_ops->ndo_get_devlink_port)
> + return dev->netdev_ops->ndo_get_devlink_port(dev);
> #endif
> return NULL;
> }
>
> +static inline struct devlink *netdev_to_devlink(struct net_device *dev)
> +{
> + struct devlink_port *devlink_port = netdev_to_devlink_port(dev);
> +
> + if (devlink_port)
> + return devlink_port->devlink;
> + return NULL;
> +}
> +
> struct ib_device;
>
> #if IS_ENABLED(CONFIG_NET_DEVLINK)
> --
> 2.14.5
>
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