net/mlx5: Implement devlink port function cmds to control ipsec_packet

Implement devlink port function commands to enable / disable IPsec
packet offloads. This is used to control the IPsec capability of the
device.

When ipsec_offload is enabled for a VF, it prevents adding IPsec packet
offloads on the PF, because the two cannot be active simultaneously due
to HW constraints. Conversely, if there are any active IPsec packet
offloads on the PF, it's not allowed to enable ipsec_packet on a VF,
until PF IPsec offloads are cleared.

Signed-off-by: Dima Chumak <dchumak@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Link: https://lore.kernel.org/r/20230825062836.103744-9-saeed@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 84 insertions, 0 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
index f37d30a096c0..752fb0dfb111 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
@@ -4451,4 +4451,88 @@ unlock:
 	mutex_unlock(&esw->state_lock);
 	return err;
 }
+
+int mlx5_devlink_port_fn_ipsec_packet_get(struct devlink_port *port, bool *is_enabled,
+					  struct netlink_ext_ack *extack)
+{
+	struct mlx5_eswitch *esw;
+	struct mlx5_vport *vport;
+	int err = 0;
+
+	esw = mlx5_devlink_eswitch_get(port->devlink);
+	if (IS_ERR(esw))
+		return PTR_ERR(esw);
+
+	if (!mlx5_esw_ipsec_vf_offload_supported(esw->dev)) {
+		NL_SET_ERR_MSG_MOD(extack, "Device doesn't support IPsec packet");
+		return -EOPNOTSUPP;
+	}
+
+	vport = mlx5_devlink_port_vport_get(port);
+
+	mutex_lock(&esw->state_lock);
+	if (!vport->enabled) {
+		err = -EOPNOTSUPP;
+		goto unlock;
+	}
+
+	*is_enabled = vport->info.ipsec_packet_enabled;
+unlock:
+	mutex_unlock(&esw->state_lock);
+	return err;
+}
+
+int mlx5_devlink_port_fn_ipsec_packet_set(struct devlink_port *port,
+					  bool enable,
+					  struct netlink_ext_ack *extack)
+{
+	struct mlx5_eswitch *esw;
+	struct mlx5_vport *vport;
+	u16 vport_num;
+	int err;
+
+	esw = mlx5_devlink_eswitch_get(port->devlink);
+	if (IS_ERR(esw))
+		return PTR_ERR(esw);
+
+	vport_num = mlx5_esw_devlink_port_index_to_vport_num(port->index);
+	err = mlx5_esw_ipsec_vf_packet_offload_supported(esw->dev, vport_num);
+	if (err) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Device doesn't support IPsec packet mode");
+		return err;
+	}
+
+	vport = mlx5_devlink_port_vport_get(port);
+	mutex_lock(&esw->state_lock);
+	if (!vport->enabled) {
+		err = -EOPNOTSUPP;
+		NL_SET_ERR_MSG_MOD(extack, "Eswitch vport is disabled");
+		goto unlock;
+	}
+
+	if (vport->info.ipsec_packet_enabled == enable)
+		goto unlock;
+
+	if (!esw->enabled_ipsec_vf_count && esw->dev->num_ipsec_offloads) {
+		err = -EBUSY;
+		goto unlock;
+	}
+
+	err = mlx5_esw_ipsec_vf_packet_offload_set(esw, vport, enable);
+	if (err) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Failed to set IPsec packet mode");
+		goto unlock;
+	}
+
+	vport->info.ipsec_packet_enabled = enable;
+	if (enable)
+		esw->enabled_ipsec_vf_count++;
+	else
+		esw->enabled_ipsec_vf_count--;
+unlock:
+	mutex_unlock(&esw->state_lock);
+	return err;
+}
 #endif /* CONFIG_XFRM_OFFLOAD */