include/net/devlink.h

   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
  22 struct devlink_ops;
  23
  24 struct 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
  33 struct 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
  45 struct 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
  54 static inline void *devlink_priv(struct devlink *devlink)
  55 {
  56         BUG_ON(!devlink);
  57         return &devlink->priv;
  58 }
  59
  60 static inline struct devlink *priv_to_devlink(void *priv)
  61 {
  62         BUG_ON(!priv);
  63         return container_of(priv, struct devlink, priv);
  64 }
  65
  66 struct ib_device;
  67
  68 #if IS_ENABLED(CONFIG_NET_DEVLINK)
  69
  70 struct devlink *devlink_alloc(const struct devlink_ops *ops, size_t priv_size);
  71 int devlink_register(struct devlink *devlink, struct device *dev);
  72 void devlink_unregister(struct devlink *devlink);
  73 void devlink_free(struct devlink *devlink);
  74 int devlink_port_register(struct devlink *devlink,
  75                           struct devlink_port *devlink_port,
  76                           unsigned int port_index);
  77 void devlink_port_unregister(struct devlink_port *devlink_port);
  78 void devlink_port_type_eth_set(struct devlink_port *devlink_port,
  79                                struct net_device *netdev);
  80 void devlink_port_type_ib_set(struct devlink_port *devlink_port,
  81                               struct ib_device *ibdev);
  82 void devlink_port_type_clear(struct devlink_port *devlink_port);
  83 void devlink_port_split_set(struct devlink_port *devlink_port,
  84                             u32 split_group);
  85
  86 #else
  87
  88 static 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
  94 static inline int devlink_register(struct devlink *devlink, struct device *dev)
  95 {
  96         return 0;
  97 }
  98
  99 static inline void devlink_unregister(struct devlink *devlink)
 100 {
 101 }
 102
 103 static inline void devlink_free(struct devlink *devlink)
 104 {
 105         kfree(devlink);
 106 }
 107
 108 static 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
 115 static inline void devlink_port_unregister(struct devlink_port *devlink_port)
 116 {
 117 }
 118
 119 static inline void devlink_port_type_eth_set(struct devlink_port *devlink_port,
 120                                              struct net_device *netdev)
 121 {
 122 }
 123
 124 static inline void devlink_port_type_ib_set(struct devlink_port *devlink_port,
 125                                             struct ib_device *ibdev)
 126 {
 127 }
 128
 129 static inline void devlink_port_type_clear(struct devlink_port *devlink_port)
 130 {
 131 }
 132
 133 static 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_ */