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 17 struct mctp_sk_key; 18 19 struct mctp_dev { 20 struct net_device *dev; 21 22 refcount_t refs; 23 24 unsigned int net; 25 enum mctp_phys_binding binding; 26 27 const struct mctp_netdev_ops *ops; 28 29 /* Only modified under RTNL. Reads have addrs_lock held */ 30 u8 *addrs; 31 size_t num_addrs; 32 spinlock_t addrs_lock; 33 34 struct rcu_head rcu; 35 }; 36 37 struct mctp_netdev_ops { 38 void (*release_flow)(struct mctp_dev *dev, 39 struct mctp_sk_key *key); 40 }; 41 42 #define MCTP_INITIAL_DEFAULT_NET 1 43 44 struct mctp_dev *mctp_dev_get_rtnl(const struct net_device *dev); 45 struct mctp_dev *__mctp_dev_get(const struct net_device *dev); 46 47 int mctp_register_netdev(struct net_device *dev, 48 const struct mctp_netdev_ops *ops, 49 enum mctp_phys_binding binding); 50 void mctp_unregister_netdev(struct net_device *dev); 51 52 void mctp_dev_hold(struct mctp_dev *mdev); 53 void mctp_dev_put(struct mctp_dev *mdev); 54 55 void mctp_dev_set_key(struct mctp_dev *dev, struct mctp_sk_key *key); 56 void mctp_dev_release_key(struct mctp_dev *dev, struct mctp_sk_key *key); 57 58 #endif /* __NET_MCTPDEVICE_H */ 59