1/* SPDX-License-Identifier: GPL-2.0 */
 2/*
 3 * Management Component Transport Protocol (MCTP) - device
 4 * definitions.
 5 *
 6 * Copyright (c) 2021 Code Construct
 7 * Copyright (c) 2021 Google
 8 */
 9
10#ifndef __NET_MCTPDEVICE_H
11#define __NET_MCTPDEVICE_H
12
13#include <linux/list.h>
14#include <linux/types.h>
15#include <linux/refcount.h>
16
17struct mctp_sk_key;
18
19struct mctp_dev {
20	struct net_device	*dev;
21
22	refcount_t		refs;
23
24	unsigned int		net;
25
26	const struct mctp_netdev_ops *ops;
27
28	/* Only modified under RTNL. Reads have addrs_lock held */
29	u8			*addrs;
30	size_t			num_addrs;
31	spinlock_t		addrs_lock;
32
33	struct rcu_head		rcu;
34};
35
36struct mctp_netdev_ops {
37	void			(*release_flow)(struct mctp_dev *dev,
38						struct mctp_sk_key *key);
39};
40
41#define MCTP_INITIAL_DEFAULT_NET	1
42
43struct mctp_dev *mctp_dev_get_rtnl(const struct net_device *dev);
44struct mctp_dev *__mctp_dev_get(const struct net_device *dev);
45
46int mctp_register_netdev(struct net_device *dev,
47			 const struct mctp_netdev_ops *ops);
48void mctp_unregister_netdev(struct net_device *dev);
49
50void mctp_dev_hold(struct mctp_dev *mdev);
51void mctp_dev_put(struct mctp_dev *mdev);
52
53void mctp_dev_set_key(struct mctp_dev *dev, struct mctp_sk_key *key);
54void mctp_dev_release_key(struct mctp_dev *dev, struct mctp_sk_key *key);
55
56#endif /* __NET_MCTPDEVICE_H */