net/mlx5: Set default max eqs for SFs

If the user hasn't configured max_io_eqs set a low default. The SF
driver shouldn't try to create more than this, but FW will enforce this
limit.

Signed-off-by: Daniel Jurgens <danielj@nvidia.com>
Reviewed-by: William Tu <witu@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Link: https://patch.msgid.link/20240712003310.355106-4-saeed@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/mellanox/mlx5/core/eswitch.h

@@ -223,6 +223,7 @@ struct mlx5_vport {
 
 	u16 vport;
 	bool                    enabled;
+	bool max_eqs_set;
 	enum mlx5_eswitch_vport_event enabled_events;
 	int index;
 	struct mlx5_devlink_port *dl_port;
@@ -579,6 +580,8 @@ int mlx5_devlink_port_fn_max_io_eqs_get(struct devlink_port *port,
 int mlx5_devlink_port_fn_max_io_eqs_set(struct devlink_port *port,
 					u32 max_io_eqs,
 					struct netlink_ext_ack *extack);
+int mlx5_devlink_port_fn_max_io_eqs_set_sf_default(struct devlink_port *port,
+						   struct netlink_ext_ack *extack);
 
 void *mlx5_eswitch_get_uplink_priv(struct mlx5_eswitch *esw, u8 rep_type);
 

drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c

@@ -68,6 +68,7 @@
 #define MLX5_ESW_FT_OFFLOADS_DROP_RULE (1)
 
 #define MLX5_ESW_MAX_CTRL_EQS 4
+#define MLX5_ESW_DEFAULT_SF_COMP_EQS 8
 
 static struct esw_vport_tbl_namespace mlx5_esw_vport_tbl_mirror_ns = {
 	.max_fte = MLX5_ESW_VPORT_TBL_SIZE,
@@ -4683,9 +4684,18 @@ mlx5_devlink_port_fn_max_io_eqs_set(struct devlink_port *port, u32 max_io_eqs,
 					    MLX5_SET_HCA_CAP_OP_MOD_GENERAL_DEVICE2);
 	if (err)
 		NL_SET_ERR_MSG_MOD(extack, "Failed setting HCA caps");
-
+	vport->max_eqs_set = true;
 out:
 	mutex_unlock(&esw->state_lock);
 	kfree(query_ctx);
 	return err;
 }
+
+int
+mlx5_devlink_port_fn_max_io_eqs_set_sf_default(struct devlink_port *port,
+					       struct netlink_ext_ack *extack)
+{
+	return mlx5_devlink_port_fn_max_io_eqs_set(port,
+						   MLX5_ESW_DEFAULT_SF_COMP_EQS,
+						   extack);
+}

drivers/net/ethernet/mellanox/mlx5/core/sf/devlink.c

@@ -161,6 +161,7 @@ int mlx5_devlink_sf_port_fn_state_get(struct devlink_port *dl_port,
 static int mlx5_sf_activate(struct mlx5_core_dev *dev, struct mlx5_sf *sf,
 			    struct netlink_ext_ack *extack)
 {
+	struct mlx5_vport *vport;
 	int err;
 
 	if (mlx5_sf_is_active(sf))
@@ -170,6 +171,13 @@ static int mlx5_sf_activate(struct mlx5_core_dev *dev, struct mlx5_sf *sf,
 		return -EBUSY;
 	}
 
+	vport = mlx5_devlink_port_vport_get(&sf->dl_port.dl_port);
+	if (!vport->max_eqs_set && MLX5_CAP_GEN_2(dev, max_num_eqs_24b)) {
+		err = mlx5_devlink_port_fn_max_io_eqs_set_sf_default(&sf->dl_port.dl_port,
+								     extack);
+		if (err)
+			return err;
+	}
 	err = mlx5_cmd_sf_enable_hca(dev, sf->hw_fn_id);
 	if (err)
 		return err;
@@ -318,7 +326,11 @@ int mlx5_devlink_sf_port_new(struct devlink *devlink,
 
 static void mlx5_sf_dealloc(struct mlx5_sf_table *table, struct mlx5_sf *sf)
 {
+	struct mlx5_vport *vport;
+
 	mutex_lock(&table->sf_state_lock);
+	vport = mlx5_devlink_port_vport_get(&sf->dl_port.dl_port);
+	vport->max_eqs_set = false;
 
 	mlx5_sf_function_id_erase(table, sf);