1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB 2*4882a593Smuzhiyun /* Copyright (c) 2020 Mellanox Technologies Ltd. */ 3*4882a593Smuzhiyun 4*4882a593Smuzhiyun #include <linux/module.h> 5*4882a593Smuzhiyun #include <linux/mlx5/driver.h> 6*4882a593Smuzhiyun #include <linux/mlx5/device.h> 7*4882a593Smuzhiyun #include "mlx5_vdpa_ifc.h" 8*4882a593Smuzhiyun #include "mlx5_vnet.h" 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun MODULE_AUTHOR("Eli Cohen <eli@mellanox.com>"); 11*4882a593Smuzhiyun MODULE_DESCRIPTION("Mellanox VDPA driver"); 12*4882a593Smuzhiyun MODULE_LICENSE("Dual BSD/GPL"); 13*4882a593Smuzhiyun required_caps_supported(struct mlx5_core_dev * mdev)14*4882a593Smuzhiyunstatic bool required_caps_supported(struct mlx5_core_dev *mdev) 15*4882a593Smuzhiyun { 16*4882a593Smuzhiyun u8 event_mode; 17*4882a593Smuzhiyun u64 got; 18*4882a593Smuzhiyun 19*4882a593Smuzhiyun got = MLX5_CAP_GEN_64(mdev, general_obj_types); 20*4882a593Smuzhiyun 21*4882a593Smuzhiyun if (!(got & MLX5_GENERAL_OBJ_TYPES_CAP_VIRTIO_NET_Q)) 22*4882a593Smuzhiyun return false; 23*4882a593Smuzhiyun 24*4882a593Smuzhiyun event_mode = MLX5_CAP_DEV_VDPA_EMULATION(mdev, event_mode); 25*4882a593Smuzhiyun if (!(event_mode & MLX5_VIRTIO_Q_EVENT_MODE_QP_MODE)) 26*4882a593Smuzhiyun return false; 27*4882a593Smuzhiyun 28*4882a593Smuzhiyun if (!MLX5_CAP_DEV_VDPA_EMULATION(mdev, eth_frame_offload_type)) 29*4882a593Smuzhiyun return false; 30*4882a593Smuzhiyun 31*4882a593Smuzhiyun return true; 32*4882a593Smuzhiyun } 33*4882a593Smuzhiyun mlx5_vdpa_add(struct mlx5_core_dev * mdev)34*4882a593Smuzhiyunstatic void *mlx5_vdpa_add(struct mlx5_core_dev *mdev) 35*4882a593Smuzhiyun { 36*4882a593Smuzhiyun struct mlx5_vdpa_dev *vdev; 37*4882a593Smuzhiyun 38*4882a593Smuzhiyun if (mlx5_core_is_pf(mdev)) 39*4882a593Smuzhiyun return NULL; 40*4882a593Smuzhiyun 41*4882a593Smuzhiyun if (!required_caps_supported(mdev)) { 42*4882a593Smuzhiyun dev_info(mdev->device, "virtio net emulation not supported\n"); 43*4882a593Smuzhiyun return NULL; 44*4882a593Smuzhiyun } 45*4882a593Smuzhiyun vdev = mlx5_vdpa_add_dev(mdev); 46*4882a593Smuzhiyun if (IS_ERR(vdev)) 47*4882a593Smuzhiyun return NULL; 48*4882a593Smuzhiyun 49*4882a593Smuzhiyun return vdev; 50*4882a593Smuzhiyun } 51*4882a593Smuzhiyun mlx5_vdpa_remove(struct mlx5_core_dev * mdev,void * context)52*4882a593Smuzhiyunstatic void mlx5_vdpa_remove(struct mlx5_core_dev *mdev, void *context) 53*4882a593Smuzhiyun { 54*4882a593Smuzhiyun struct mlx5_vdpa_dev *vdev = context; 55*4882a593Smuzhiyun 56*4882a593Smuzhiyun mlx5_vdpa_remove_dev(vdev); 57*4882a593Smuzhiyun } 58*4882a593Smuzhiyun 59*4882a593Smuzhiyun static struct mlx5_interface mlx5_vdpa_interface = { 60*4882a593Smuzhiyun .add = mlx5_vdpa_add, 61*4882a593Smuzhiyun .remove = mlx5_vdpa_remove, 62*4882a593Smuzhiyun .protocol = MLX5_INTERFACE_PROTOCOL_VDPA, 63*4882a593Smuzhiyun }; 64*4882a593Smuzhiyun mlx5_vdpa_init(void)65*4882a593Smuzhiyunstatic int __init mlx5_vdpa_init(void) 66*4882a593Smuzhiyun { 67*4882a593Smuzhiyun return mlx5_register_interface(&mlx5_vdpa_interface); 68*4882a593Smuzhiyun } 69*4882a593Smuzhiyun mlx5_vdpa_exit(void)70*4882a593Smuzhiyunstatic void __exit mlx5_vdpa_exit(void) 71*4882a593Smuzhiyun { 72*4882a593Smuzhiyun mlx5_unregister_interface(&mlx5_vdpa_interface); 73*4882a593Smuzhiyun } 74*4882a593Smuzhiyun 75*4882a593Smuzhiyun module_init(mlx5_vdpa_init); 76*4882a593Smuzhiyun module_exit(mlx5_vdpa_exit); 77