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// 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);
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