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Subject[RFC net-next 10/13] net/mlx5e: Handle SWITCHDEV_PORT_ATTR_GET event
Date
Following patches will change the way we communicate getting or setting
a port's attribute and use a blocking notifier to perform those tasks.

Prepare mlx5e/en_rep.c to support receiving notifier events targeting
SWITCHDEV_PORT_ATTR_GET and simply translate that into the existing
switchdev_ops::switchdev_port_attr_get operation.

We register a single blocking switchdev notifier for the entire set of
representors given that mlx5e_rep_register_vport_reps() gets called for
an Ethernet device.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
.../net/ethernet/mellanox/mlx5/core/en_main.c | 4 +-
.../net/ethernet/mellanox/mlx5/core/en_rep.c | 45 ++++++++++++++++++-
.../net/ethernet/mellanox/mlx5/core/en_rep.h | 2 +-
3 files changed, 48 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index dee0c8f3d4e9..fcfe1c9d3575 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -5036,7 +5036,9 @@ static void *mlx5e_add(struct mlx5_core_dev *mdev)
#ifdef CONFIG_MLX5_ESWITCH
if (MLX5_ESWITCH_MANAGER(mdev) &&
mlx5_eswitch_mode(mdev->priv.eswitch) == SRIOV_OFFLOADS) {
- mlx5e_rep_register_vport_reps(mdev);
+ err = mlx5e_rep_register_vport_reps(mdev);
+ if (err)
+ return NULL;
return mdev;
}
#endif
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
index 04736212a21c..9bac78e111c6 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
@@ -1289,6 +1289,21 @@ static const struct switchdev_ops mlx5e_rep_switchdev_ops = {
.switchdev_port_attr_get = mlx5e_attr_get,
};

+static int mlx5e_rep_swdev_port_attr_event(unsigned long event,
+ struct net_device *dev,
+ struct switchdev_notifier_port_attr_info *port_attr_info)
+{
+ int rc;
+
+ if (event != SWITCHDEV_PORT_ATTR_GET)
+ return NOTIFY_DONE;
+
+ rc = mlx5e_attr_get(dev, port_attr_info->attr);
+ port_attr_info->handled = true;
+
+ return notifier_from_errno(rc);
+}
+
static const struct net_device_ops mlx5e_netdev_ops_vf_rep = {
.ndo_open = mlx5e_vf_rep_open,
.ndo_stop = mlx5e_vf_rep_close,
@@ -1321,6 +1336,22 @@ static const struct net_device_ops mlx5e_netdev_ops_uplink_rep = {
.ndo_get_vf_stats = mlx5e_get_vf_stats,
};

+static int mlx5e_rep_swdev_blocking_event(struct notifier_block *nb,
+ unsigned long event, void *ptr)
+{
+ struct net_device *netdev = switchdev_notifier_info_to_dev(ptr);
+
+ if (netdev->netdev_ops != &mlx5e_netdev_ops_vf_rep)
+ return NOTIFY_DONE;
+
+ switch (event) {
+ case SWITCHDEV_PORT_ATTR_GET:
+ return mlx5e_rep_swdev_port_attr_event(event, netdev, ptr);
+ }
+
+ return NOTIFY_DONE;
+}
+
bool mlx5e_eswitch_rep(struct net_device *netdev)
{
if (netdev->netdev_ops == &mlx5e_netdev_ops_vf_rep ||
@@ -1798,11 +1829,20 @@ static void *mlx5e_vport_rep_get_proto_dev(struct mlx5_eswitch_rep *rep)
return rpriv->netdev;
}

-void mlx5e_rep_register_vport_reps(struct mlx5_core_dev *mdev)
+static struct notifier_block mlx5e_rep_swdev_nb = {
+ .notifier_call = mlx5e_rep_swdev_blocking_event,
+};
+
+int mlx5e_rep_register_vport_reps(struct mlx5_core_dev *mdev)
{
struct mlx5_eswitch *esw = mdev->priv.eswitch;
int total_vfs = MLX5_TOTAL_VPORTS(mdev);
int vport;
+ int rc;
+
+ rc = register_switchdev_blocking_notifier(&mlx5e_rep_swdev_nb);
+ if (rc)
+ return rc;

for (vport = 0; vport < total_vfs; vport++) {
struct mlx5_eswitch_rep_if rep_if = {};
@@ -1812,6 +1852,8 @@ void mlx5e_rep_register_vport_reps(struct mlx5_core_dev *mdev)
rep_if.get_proto_dev = mlx5e_vport_rep_get_proto_dev;
mlx5_eswitch_register_vport_rep(esw, vport, &rep_if, REP_ETH);
}
+
+ return rc;
}

void mlx5e_rep_unregister_vport_reps(struct mlx5_core_dev *mdev)
@@ -1822,4 +1864,5 @@ void mlx5e_rep_unregister_vport_reps(struct mlx5_core_dev *mdev)

for (vport = total_vfs - 1; vport >= 0; vport--)
mlx5_eswitch_unregister_vport_rep(esw, vport, REP_ETH);
+ unregister_switchdev_blocking_notifier(&mlx5e_rep_swdev_nb);
}
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.h b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.h
index edd722824697..b9e0507f6100 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.h
@@ -162,7 +162,7 @@ struct mlx5e_rep_sq {
};

void *mlx5e_alloc_nic_rep_priv(struct mlx5_core_dev *mdev);
-void mlx5e_rep_register_vport_reps(struct mlx5_core_dev *mdev);
+int mlx5e_rep_register_vport_reps(struct mlx5_core_dev *mdev);
void mlx5e_rep_unregister_vport_reps(struct mlx5_core_dev *mdev);
bool mlx5e_is_uplink_rep(struct mlx5e_priv *priv);
int mlx5e_add_sqs_fwd_rules(struct mlx5e_priv *priv);
--
2.17.1
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