// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB /* Copyright (c) 2020 Mellanox Technologies Ltd. */ #include <linux/module.h> #include <linux/mlx5/driver.h> #include <linux/mlx5/device.h> #include "mlx5_vdpa_ifc.h" #include "mlx5_vnet.h" MODULE_AUTHOR("Eli Cohen <eli@mellanox.com>"); MODULE_DESCRIPTION("Mellanox VDPA driver"); MODULE_LICENSE("Dual BSD/GPL"); static bool required_caps_supported(struct mlx5_core_dev *mdev) { u8 event_mode; u64 got; got = MLX5_CAP_GEN_64(mdev, general_obj_types); if (!(got & MLX5_GENERAL_OBJ_TYPES_CAP_VIRTIO_NET_Q)) return false; event_mode = MLX5_CAP_DEV_VDPA_EMULATION(mdev, event_mode); if (!(event_mode & MLX5_VIRTIO_Q_EVENT_MODE_QP_MODE)) return false; if (!MLX5_CAP_DEV_VDPA_EMULATION(mdev, eth_frame_offload_type)) return false; return true; } static void *mlx5_vdpa_add(struct mlx5_core_dev *mdev) { struct mlx5_vdpa_dev *vdev; if (mlx5_core_is_pf(mdev)) return NULL; if (!required_caps_supported(mdev)) { dev_info(mdev->device, "virtio net emulation not supported\n"); return NULL; } vdev = mlx5_vdpa_add_dev(mdev); if (IS_ERR(vdev)) return NULL; return vdev; } static void mlx5_vdpa_remove(struct mlx5_core_dev *mdev, void *context) { struct mlx5_vdpa_dev *vdev = context; mlx5_vdpa_remove_dev(vdev); } static struct mlx5_interface mlx5_vdpa_interface = { .add = mlx5_vdpa_add, .remove = mlx5_vdpa_remove, .protocol = MLX5_INTERFACE_PROTOCOL_VDPA, }; static int __init mlx5_vdpa_init(void) { return mlx5_register_interface(&mlx5_vdpa_interface); } static void __exit mlx5_vdpa_exit(void) { mlx5_unregister_interface(&mlx5_vdpa_interface); } module_init(mlx5_vdpa_init); module_exit(mlx5_vdpa_exit);