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Date: Fri, 13 Sep 2019 09:06:45 +0000
From: Shalom Toledo <shalomt@...lanox.com>
To: Jiri Pirko <jiri@...nulli.us>
CC: Ido Schimmel <idosch@...sch.org>,
"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
"davem@...emloft.net" <davem@...emloft.net>,
Jiri Pirko <jiri@...lanox.com>, mlxsw <mlxsw@...lanox.com>,
Ido Schimmel <idosch@...lanox.com>
Subject: Re: [PATCH net-next 1/2] mlxsw: spectrum: Register CPU port with
devlink
On Fri, Sep 13, 2019 at 10:02:23AM +0200, Jiri Pirko wrote:
> Thu, Sep 12, 2019 at 03:07:39PM CEST, idosch@...sch.org wrote:
> >From: Shalom Toledo <shalomt@...lanox.com>
> >
> >Register CPU port with devlink.
> >
> >Signed-off-by: Shalom Toledo <shalomt@...lanox.com>
> >Signed-off-by: Ido Schimmel <idosch@...lanox.com>
> >---
> > drivers/net/ethernet/mellanox/mlxsw/core.c | 33 +++++++++++++
> > drivers/net/ethernet/mellanox/mlxsw/core.h | 5 ++
> > .../net/ethernet/mellanox/mlxsw/spectrum.c | 47 +++++++++++++++++++
> > 3 files changed, 85 insertions(+)
> >
> >diff --git a/drivers/net/ethernet/mellanox/mlxsw/core.c b/drivers/net/ethernet/mellanox/mlxsw/core.c
> >index 963a2b4b61b1..94f83d2be17e 100644
> >--- a/drivers/net/ethernet/mellanox/mlxsw/core.c
> >+++ b/drivers/net/ethernet/mellanox/mlxsw/core.c
> >@@ -1892,6 +1892,39 @@ void mlxsw_core_port_fini(struct mlxsw_core *mlxsw_core, u8 local_port)
> > }
> > EXPORT_SYMBOL(mlxsw_core_port_fini);
> >
> >+int mlxsw_core_cpu_port_init(struct mlxsw_core *mlxsw_core,
> >+ void *port_driver_priv,
> >+ const unsigned char *switch_id,
> >+ unsigned char switch_id_len)
> >+{
> >+ struct devlink *devlink = priv_to_devlink(mlxsw_core);
> >+ struct mlxsw_core_port *mlxsw_core_port =
> >+ &mlxsw_core->ports[MLXSW_PORT_CPU_PORT];
> >+ struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port;
> >+ int err;
> >+
> >+ mlxsw_core_port->local_port = MLXSW_PORT_CPU_PORT;
> >+ mlxsw_core_port->port_driver_priv = port_driver_priv;
> >+ devlink_port_attrs_set(devlink_port, DEVLINK_PORT_FLAVOUR_CPU,
> >+ 0, false, 0, switch_id, switch_id_len);
> >+ err = devlink_port_register(devlink, devlink_port, MLXSW_PORT_CPU_PORT);
> >+ if (err)
> >+ memset(mlxsw_core_port, 0, sizeof(*mlxsw_core_port));
> >+ return err;
>
> This duplicates almost 100% of code of mlxsw_core_port_init. Please do a
> common function what can be used by both.
Ok, I will send another version on Sunday.
>
>
> >+}
> >+EXPORT_SYMBOL(mlxsw_core_cpu_port_init);
> >+
> >+void mlxsw_core_cpu_port_fini(struct mlxsw_core *mlxsw_core)
> >+{
> >+ struct mlxsw_core_port *mlxsw_core_port =
> >+ &mlxsw_core->ports[MLXSW_PORT_CPU_PORT];
> >+ struct devlink_port *devlink_port = &mlxsw_core_port->devlink_port;
> >+
> >+ devlink_port_unregister(devlink_port);
> >+ memset(mlxsw_core_port, 0, sizeof(*mlxsw_core_port));
> >+}
> >+EXPORT_SYMBOL(mlxsw_core_cpu_port_fini);
> >+
> > void mlxsw_core_port_eth_set(struct mlxsw_core *mlxsw_core, u8 local_port,
> > void *port_driver_priv, struct net_device *dev)
> > {
> >diff --git a/drivers/net/ethernet/mellanox/mlxsw/core.h b/drivers/net/ethernet/mellanox/mlxsw/core.h
> >index b65a17d49e43..5d7d2ab6d155 100644
> >--- a/drivers/net/ethernet/mellanox/mlxsw/core.h
> >+++ b/drivers/net/ethernet/mellanox/mlxsw/core.h
> >@@ -177,6 +177,11 @@ int mlxsw_core_port_init(struct mlxsw_core *mlxsw_core, u8 local_port,
> > const unsigned char *switch_id,
> > unsigned char switch_id_len);
> > void mlxsw_core_port_fini(struct mlxsw_core *mlxsw_core, u8 local_port);
> >+int mlxsw_core_cpu_port_init(struct mlxsw_core *mlxsw_core,
> >+ void *port_driver_priv,
> >+ const unsigned char *switch_id,
> >+ unsigned char switch_id_len);
> >+void mlxsw_core_cpu_port_fini(struct mlxsw_core *mlxsw_core);
> > void mlxsw_core_port_eth_set(struct mlxsw_core *mlxsw_core, u8 local_port,
> > void *port_driver_priv, struct net_device *dev);
> > void mlxsw_core_port_ib_set(struct mlxsw_core *mlxsw_core, u8 local_port,
> >diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
> >index 91e4792bb7e7..1fc73a9ad84d 100644
> >--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
> >+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
> >@@ -3872,6 +3872,46 @@ static void mlxsw_sp_port_remove(struct mlxsw_sp *mlxsw_sp, u8 local_port)
> > mlxsw_core_port_fini(mlxsw_sp->core, local_port);
> > }
> >
> >+static int mlxsw_sp_cpu_port_create(struct mlxsw_sp *mlxsw_sp)
> >+{
> >+ struct mlxsw_sp_port *mlxsw_sp_port;
> >+ int err;
> >+
> >+ mlxsw_sp_port = kzalloc(sizeof(*mlxsw_sp_port), GFP_KERNEL);
> >+ if (!mlxsw_sp_port)
> >+ return -ENOMEM;
> >+
> >+ mlxsw_sp_port->mlxsw_sp = mlxsw_sp;
> >+ mlxsw_sp_port->local_port = MLXSW_PORT_CPU_PORT;
> >+
> >+ mlxsw_sp->ports[MLXSW_PORT_CPU_PORT] = mlxsw_sp_port;
>
> Assign this at the end of the function and avoid NULL assignment on
> error path.
>
>
> >+
> >+ err = mlxsw_core_cpu_port_init(mlxsw_sp->core,
> >+ mlxsw_sp_port,
> >+ mlxsw_sp->base_mac,
> >+ sizeof(mlxsw_sp->base_mac));
> >+ if (err) {
> >+ dev_err(mlxsw_sp->bus_info->dev, "Failed to initialize core CPU port\n");
> >+ goto err_core_cpu_port_init;
> >+ }
> >+
> >+ return err;
> >+
> >+err_core_cpu_port_init:
> >+ mlxsw_sp->ports[MLXSW_PORT_CPU_PORT] = NULL;
> >+ kfree(mlxsw_sp_port);
> >+ return err;
> >+}
> >+
> >+static void mlxsw_sp_cpu_port_remove(struct mlxsw_sp *mlxsw_sp)
> >+{
> >+ struct mlxsw_sp_port *mlxsw_sp_port = mlxsw_sp->ports[0];
>
> s/0/MLXSW_PORT_CPU_PORT/
>
>
> >+
> >+ mlxsw_core_cpu_port_fini(mlxsw_sp->core);
> >+ mlxsw_sp->ports[MLXSW_PORT_CPU_PORT] = NULL;
> >+ kfree(mlxsw_sp_port);
> >+}
> >+
> > static bool mlxsw_sp_port_created(struct mlxsw_sp *mlxsw_sp, u8 local_port)
> > {
> > return mlxsw_sp->ports[local_port] != NULL;
> >@@ -3884,6 +3924,7 @@ static void mlxsw_sp_ports_remove(struct mlxsw_sp *mlxsw_sp)
> > for (i = 1; i < mlxsw_core_max_ports(mlxsw_sp->core); i++)
> > if (mlxsw_sp_port_created(mlxsw_sp, i))
> > mlxsw_sp_port_remove(mlxsw_sp, i);
> >+ mlxsw_sp_cpu_port_remove(mlxsw_sp);
> > kfree(mlxsw_sp->port_to_module);
> > kfree(mlxsw_sp->ports);
> > }
> >@@ -3908,6 +3949,10 @@ static int mlxsw_sp_ports_create(struct mlxsw_sp *mlxsw_sp)
> > goto err_port_to_module_alloc;
> > }
> >
> >+ err = mlxsw_sp_cpu_port_create(mlxsw_sp);
> >+ if (err)
> >+ goto err_cpu_port_create;
> >+
> > for (i = 1; i < max_ports; i++) {
> > /* Mark as invalid */
> > mlxsw_sp->port_to_module[i] = -1;
> >@@ -3931,6 +3976,8 @@ static int mlxsw_sp_ports_create(struct mlxsw_sp *mlxsw_sp)
> > for (i--; i >= 1; i--)
> > if (mlxsw_sp_port_created(mlxsw_sp, i))
> > mlxsw_sp_port_remove(mlxsw_sp, i);
> >+ mlxsw_sp_cpu_port_remove(mlxsw_sp);
> >+err_cpu_port_create:
> > kfree(mlxsw_sp->port_to_module);
> > err_port_to_module_alloc:
> > kfree(mlxsw_sp->ports);
> >--
> >2.21.0
> >
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