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linux
1/*
2 * include/net/devlink.h - Network physical device Netlink interface
3 * Copyright (c) 2016 Mellanox Technologies. All rights reserved.
4 * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 */
11#ifndef _NET_DEVLINK_H_
12#define _NET_DEVLINK_H_
13
14#include <linux/device.h>
15#include <linux/slab.h>
16#include <linux/gfp.h>
17#include <linux/list.h>
18#include <linux/netdevice.h>
19#include <net/net_namespace.h>
20#include <uapi/linux/devlink.h>
21
22struct devlink_ops;
23
24struct devlink {
25 struct list_head list;
26 struct list_head port_list;
27 const struct devlink_ops *ops;
28 struct device *dev;
29 possible_net_t _net;
30 char priv[0] __aligned(NETDEV_ALIGN);
31};
32
33struct devlink_port {
34 struct list_head list;
35 struct devlink *devlink;
36 unsigned index;
37 bool registered;
38 enum devlink_port_type type;
39 enum devlink_port_type desired_type;
40 void *type_dev;
41 bool split;
42 u32 split_group;
43};
44
45struct devlink_ops {
46 size_t priv_size;
47 int (*port_type_set)(struct devlink_port *devlink_port,
48 enum devlink_port_type port_type);
49 int (*port_split)(struct devlink *devlink, unsigned int port_index,
50 unsigned int count);
51 int (*port_unsplit)(struct devlink *devlink, unsigned int port_index);
52};
53
54static inline void *devlink_priv(struct devlink *devlink)
55{
56 BUG_ON(!devlink);
57 return &devlink->priv;
58}
59
60static inline struct devlink *priv_to_devlink(void *priv)
61{
62 BUG_ON(!priv);
63 return container_of(priv, struct devlink, priv);
64}
65
66struct ib_device;
67
68#if IS_ENABLED(CONFIG_NET_DEVLINK)
69
70struct devlink *devlink_alloc(const struct devlink_ops *ops, size_t priv_size);
71int devlink_register(struct devlink *devlink, struct device *dev);
72void devlink_unregister(struct devlink *devlink);
73void devlink_free(struct devlink *devlink);
74int devlink_port_register(struct devlink *devlink,
75 struct devlink_port *devlink_port,
76 unsigned int port_index);
77void devlink_port_unregister(struct devlink_port *devlink_port);
78void devlink_port_type_eth_set(struct devlink_port *devlink_port,
79 struct net_device *netdev);
80void devlink_port_type_ib_set(struct devlink_port *devlink_port,
81 struct ib_device *ibdev);
82void devlink_port_type_clear(struct devlink_port *devlink_port);
83void devlink_port_split_set(struct devlink_port *devlink_port,
84 u32 split_group);
85
86#else
87
88static inline struct devlink *devlink_alloc(const struct devlink_ops *ops,
89 size_t priv_size)
90{
91 return kzalloc(sizeof(struct devlink) + priv_size, GFP_KERNEL);
92}
93
94static inline int devlink_register(struct devlink *devlink, struct device *dev)
95{
96 return 0;
97}
98
99static inline void devlink_unregister(struct devlink *devlink)
100{
101}
102
103static inline void devlink_free(struct devlink *devlink)
104{
105 kfree(devlink);
106}
107
108static inline int devlink_port_register(struct devlink *devlink,
109 struct devlink_port *devlink_port,
110 unsigned int port_index)
111{
112 return 0;
113}
114
115static inline void devlink_port_unregister(struct devlink_port *devlink_port)
116{
117}
118
119static inline void devlink_port_type_eth_set(struct devlink_port *devlink_port,
120 struct net_device *netdev)
121{
122}
123
124static inline void devlink_port_type_ib_set(struct devlink_port *devlink_port,
125 struct ib_device *ibdev)
126{
127}
128
129static inline void devlink_port_type_clear(struct devlink_port *devlink_port)
130{
131}
132
133static inline void devlink_port_split_set(struct devlink_port *devlink_port,
134 u32 split_group)
135{
136}
137
138#endif
139
140#endif /* _NET_DEVLINK_H_ */