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	struct list_head sb_list;
 28	const struct devlink_ops *ops;
 29	struct device *dev;
 30	possible_net_t _net;
 31	char priv[0] __aligned(NETDEV_ALIGN);
 32};
 33
 34struct devlink_port {
 35	struct list_head list;
 36	struct devlink *devlink;
 37	unsigned index;
 38	bool registered;
 39	enum devlink_port_type type;
 40	enum devlink_port_type desired_type;
 41	void *type_dev;
 42	bool split;
 43	u32 split_group;
 44};
 45
 46struct devlink_sb_pool_info {
 47	enum devlink_sb_pool_type pool_type;
 48	u32 size;
 49	enum devlink_sb_threshold_type threshold_type;
 50};
 51
 52struct devlink_ops {
 53	int (*port_type_set)(struct devlink_port *devlink_port,
 54			     enum devlink_port_type port_type);
 55	int (*port_split)(struct devlink *devlink, unsigned int port_index,
 56			  unsigned int count);
 57	int (*port_unsplit)(struct devlink *devlink, unsigned int port_index);
 58	int (*sb_pool_get)(struct devlink *devlink, unsigned int sb_index,
 59			   u16 pool_index,
 60			   struct devlink_sb_pool_info *pool_info);
 61	int (*sb_pool_set)(struct devlink *devlink, unsigned int sb_index,
 62			   u16 pool_index, u32 size,
 63			   enum devlink_sb_threshold_type threshold_type);
 64	int (*sb_port_pool_get)(struct devlink_port *devlink_port,
 65				unsigned int sb_index, u16 pool_index,
 66				u32 *p_threshold);
 67	int (*sb_port_pool_set)(struct devlink_port *devlink_port,
 68				unsigned int sb_index, u16 pool_index,
 69				u32 threshold);
 70	int (*sb_tc_pool_bind_get)(struct devlink_port *devlink_port,
 71				   unsigned int sb_index,
 72				   u16 tc_index,
 73				   enum devlink_sb_pool_type pool_type,
 74				   u16 *p_pool_index, u32 *p_threshold);
 75	int (*sb_tc_pool_bind_set)(struct devlink_port *devlink_port,
 76				   unsigned int sb_index,
 77				   u16 tc_index,
 78				   enum devlink_sb_pool_type pool_type,
 79				   u16 pool_index, u32 threshold);
 80	int (*sb_occ_snapshot)(struct devlink *devlink,
 81			       unsigned int sb_index);
 82	int (*sb_occ_max_clear)(struct devlink *devlink,
 83				unsigned int sb_index);
 84	int (*sb_occ_port_pool_get)(struct devlink_port *devlink_port,
 85				    unsigned int sb_index, u16 pool_index,
 86				    u32 *p_cur, u32 *p_max);
 87	int (*sb_occ_tc_port_bind_get)(struct devlink_port *devlink_port,
 88				       unsigned int sb_index,
 89				       u16 tc_index,
 90				       enum devlink_sb_pool_type pool_type,
 91				       u32 *p_cur, u32 *p_max);
 92
 93	int (*eswitch_mode_get)(struct devlink *devlink, u16 *p_mode);
 94	int (*eswitch_mode_set)(struct devlink *devlink, u16 mode);
 95	int (*eswitch_inline_mode_get)(struct devlink *devlink, u8 *p_inline_mode);
 96	int (*eswitch_inline_mode_set)(struct devlink *devlink, u8 inline_mode);
 97};
 98
 99static inline void *devlink_priv(struct devlink *devlink)
100{
101	BUG_ON(!devlink);
102	return &devlink->priv;
103}
104
105static inline struct devlink *priv_to_devlink(void *priv)
106{
107	BUG_ON(!priv);
108	return container_of(priv, struct devlink, priv);
109}
110
111struct ib_device;
112
113#if IS_ENABLED(CONFIG_NET_DEVLINK)
114
115struct devlink *devlink_alloc(const struct devlink_ops *ops, size_t priv_size);
116int devlink_register(struct devlink *devlink, struct device *dev);
117void devlink_unregister(struct devlink *devlink);
118void devlink_free(struct devlink *devlink);
119int devlink_port_register(struct devlink *devlink,
120			  struct devlink_port *devlink_port,
121			  unsigned int port_index);
122void devlink_port_unregister(struct devlink_port *devlink_port);
123void devlink_port_type_eth_set(struct devlink_port *devlink_port,
124			       struct net_device *netdev);
125void devlink_port_type_ib_set(struct devlink_port *devlink_port,
126			      struct ib_device *ibdev);
127void devlink_port_type_clear(struct devlink_port *devlink_port);
128void devlink_port_split_set(struct devlink_port *devlink_port,
129			    u32 split_group);
130int devlink_sb_register(struct devlink *devlink, unsigned int sb_index,
131			u32 size, u16 ingress_pools_count,
132			u16 egress_pools_count, u16 ingress_tc_count,
133			u16 egress_tc_count);
134void devlink_sb_unregister(struct devlink *devlink, unsigned int sb_index);
135
136#else
137
138static inline struct devlink *devlink_alloc(const struct devlink_ops *ops,
139					    size_t priv_size)
140{
141	return kzalloc(sizeof(struct devlink) + priv_size, GFP_KERNEL);
142}
143
144static inline int devlink_register(struct devlink *devlink, struct device *dev)
145{
146	return 0;
147}
148
149static inline void devlink_unregister(struct devlink *devlink)
150{
151}
152
153static inline void devlink_free(struct devlink *devlink)
154{
155	kfree(devlink);
156}
157
158static inline int devlink_port_register(struct devlink *devlink,
159					struct devlink_port *devlink_port,
160					unsigned int port_index)
161{
162	return 0;
163}
164
165static inline void devlink_port_unregister(struct devlink_port *devlink_port)
166{
167}
168
169static inline void devlink_port_type_eth_set(struct devlink_port *devlink_port,
170					     struct net_device *netdev)
171{
172}
173
174static inline void devlink_port_type_ib_set(struct devlink_port *devlink_port,
175					    struct ib_device *ibdev)
176{
177}
178
179static inline void devlink_port_type_clear(struct devlink_port *devlink_port)
180{
181}
182
183static inline void devlink_port_split_set(struct devlink_port *devlink_port,
184					  u32 split_group)
185{
186}
187
188static inline int devlink_sb_register(struct devlink *devlink,
189				      unsigned int sb_index, u32 size,
190				      u16 ingress_pools_count,
191				      u16 egress_pools_count,
192				      u16 ingress_tc_count,
193				      u16 egress_tc_count)
194{
195	return 0;
196}
197
198static inline void devlink_sb_unregister(struct devlink *devlink,
199					 unsigned int sb_index)
200{
201}
202
203#endif
204
205#endif /* _NET_DEVLINK_H_ */