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
10MODULE_AUTHOR("Eli Cohen <eli@mellanox.com>");
11MODULE_DESCRIPTION("Mellanox VDPA driver");
12MODULE_LICENSE("Dual BSD/GPL");
13
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
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
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
59static struct mlx5_interface mlx5_vdpa_interface = {
60	.add = mlx5_vdpa_add,
61	.remove = mlx5_vdpa_remove,
62	.protocol = MLX5_INTERFACE_PROTOCOL_VDPA,
63};
64
65static int __init mlx5_vdpa_init(void)
66{
67	return mlx5_register_interface(&mlx5_vdpa_interface);
68}
69
70static void __exit mlx5_vdpa_exit(void)
71{
72	mlx5_unregister_interface(&mlx5_vdpa_interface);
73}
74
75module_init(mlx5_vdpa_init);
76module_exit(mlx5_vdpa_exit);
77