1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB 2 /* Copyright (c) 2020 Mellanox Technologies Ltd. */ 3 4 #include <linux/module.h> 5 #include <linux/mlx5/driver.h> 6 #include <linux/mlx5/device.h> 7 #include "mlx5_vdpa_ifc.h" 8 #include "mlx5_vnet.h" 9 10 MODULE_AUTHOR("Eli Cohen <eli@mellanox.com>"); 11 MODULE_DESCRIPTION("Mellanox VDPA driver"); 12 MODULE_LICENSE("Dual BSD/GPL"); 13 required_caps_supported(struct mlx5_core_dev * mdev)14static bool required_caps_supported(struct mlx5_core_dev *mdev) 15 { 16 u8 event_mode; 17 u64 got; 18 19 got = MLX5_CAP_GEN_64(mdev, general_obj_types); 20 21 if (!(got & MLX5_GENERAL_OBJ_TYPES_CAP_VIRTIO_NET_Q)) 22 return false; 23 24 event_mode = MLX5_CAP_DEV_VDPA_EMULATION(mdev, event_mode); 25 if (!(event_mode & MLX5_VIRTIO_Q_EVENT_MODE_QP_MODE)) 26 return false; 27 28 if (!MLX5_CAP_DEV_VDPA_EMULATION(mdev, eth_frame_offload_type)) 29 return false; 30 31 return true; 32 } 33 mlx5_vdpa_add(struct mlx5_core_dev * mdev)34static void *mlx5_vdpa_add(struct mlx5_core_dev *mdev) 35 { 36 struct mlx5_vdpa_dev *vdev; 37 38 if (mlx5_core_is_pf(mdev)) 39 return NULL; 40 41 if (!required_caps_supported(mdev)) { 42 dev_info(mdev->device, "virtio net emulation not supported\n"); 43 return NULL; 44 } 45 vdev = mlx5_vdpa_add_dev(mdev); 46 if (IS_ERR(vdev)) 47 return NULL; 48 49 return vdev; 50 } 51 mlx5_vdpa_remove(struct mlx5_core_dev * mdev,void * context)52static void mlx5_vdpa_remove(struct mlx5_core_dev *mdev, void *context) 53 { 54 struct mlx5_vdpa_dev *vdev = context; 55 56 mlx5_vdpa_remove_dev(vdev); 57 } 58 59 static struct mlx5_interface mlx5_vdpa_interface = { 60 .add = mlx5_vdpa_add, 61 .remove = mlx5_vdpa_remove, 62 .protocol = MLX5_INTERFACE_PROTOCOL_VDPA, 63 }; 64 mlx5_vdpa_init(void)65static int __init mlx5_vdpa_init(void) 66 { 67 return mlx5_register_interface(&mlx5_vdpa_interface); 68 } 69 mlx5_vdpa_exit(void)70static void __exit mlx5_vdpa_exit(void) 71 { 72 mlx5_unregister_interface(&mlx5_vdpa_interface); 73 } 74 75 module_init(mlx5_vdpa_init); 76 module_exit(mlx5_vdpa_exit); 77