include/net/mctpdevice.h

   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 */