projects/linux·blob v4.12-rc2 · refs

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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 <[email protected]>
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 struct list_head dpipe_table_list;
29 struct devlink_dpipe_headers *dpipe_headers;
30 const struct devlink_ops *ops;
31 struct device *dev;
32 possible_net_t _net;
33 char priv[0] __aligned(NETDEV_ALIGN);
34};
35
36struct devlink_port {
37 struct list_head list;
38 struct devlink *devlink;
39 unsigned index;
40 bool registered;
41 enum devlink_port_type type;
42 enum devlink_port_type desired_type;
43 void *type_dev;
44 bool split;
45 u32 split_group;
46};
47
48struct devlink_sb_pool_info {
49 enum devlink_sb_pool_type pool_type;
50 u32 size;
51 enum devlink_sb_threshold_type threshold_type;
52};
53
54/**
55 * struct devlink_dpipe_field - dpipe field object
56 * @name: field name
57 * @id: index inside the headers field array
58 * @bitwidth: bitwidth
59 * @mapping_type: mapping type
60 */
61struct devlink_dpipe_field {
62 const char *name;
63 unsigned int id;
64 unsigned int bitwidth;
65 enum devlink_dpipe_field_mapping_type mapping_type;
66};
67
68/**
69 * struct devlink_dpipe_header - dpipe header object
70 * @name: header name
71 * @id: index, global/local detrmined by global bit
72 * @fields: fields
73 * @fields_count: number of fields
74 * @global: indicates if header is shared like most protocol header
75 * or driver specific
76 */
77struct devlink_dpipe_header {
78 const char *name;
79 unsigned int id;
80 struct devlink_dpipe_field *fields;
81 unsigned int fields_count;
82 bool global;
83};
84
85/**
86 * struct devlink_dpipe_match - represents match operation
87 * @type: type of match
88 * @header_index: header index (packets can have several headers of same
89 * type like in case of tunnels)
90 * @header: header
91 * @fieled_id: field index
92 */
93struct devlink_dpipe_match {
94 enum devlink_dpipe_match_type type;
95 unsigned int header_index;
96 struct devlink_dpipe_header *header;
97 unsigned int field_id;
98};
99
100/**
101 * struct devlink_dpipe_action - represents action operation
102 * @type: type of action
103 * @header_index: header index (packets can have several headers of same
104 * type like in case of tunnels)
105 * @header: header
106 * @fieled_id: field index
107 */
108struct devlink_dpipe_action {
109 enum devlink_dpipe_action_type type;
110 unsigned int header_index;
111 struct devlink_dpipe_header *header;
112 unsigned int field_id;
113};
114
115/**
116 * struct devlink_dpipe_value - represents value of match/action
117 * @action: action
118 * @match: match
119 * @mapping_value: in case the field has some mapping this value
120 * specified the mapping value
121 * @mapping_valid: specify if mapping value is valid
122 * @value_size: value size
123 * @value: value
124 * @mask: bit mask
125 */
126struct devlink_dpipe_value {
127 union {
128 struct devlink_dpipe_action *action;
129 struct devlink_dpipe_match *match;
130 };
131 unsigned int mapping_value;
132 bool mapping_valid;
133 unsigned int value_size;
134 void *value;
135 void *mask;
136};
137
138/**
139 * struct devlink_dpipe_entry - table entry object
140 * @index: index of the entry in the table
141 * @match_values: match values
142 * @matche_values_count: count of matches tuples
143 * @action_values: actions values
144 * @action_values_count: count of actions values
145 * @counter: value of counter
146 * @counter_valid: Specify if value is valid from hardware
147 */
148struct devlink_dpipe_entry {
149 u64 index;
150 struct devlink_dpipe_value *match_values;
151 unsigned int match_values_count;
152 struct devlink_dpipe_value *action_values;
153 unsigned int action_values_count;
154 u64 counter;
155 bool counter_valid;
156};
157
158/**
159 * struct devlink_dpipe_dump_ctx - context provided to driver in order
160 * to dump
161 * @info: info
162 * @cmd: devlink command
163 * @skb: skb
164 * @nest: top attribute
165 * @hdr: hdr
166 */
167struct devlink_dpipe_dump_ctx {
168 struct genl_info *info;
169 enum devlink_command cmd;
170 struct sk_buff *skb;
171 struct nlattr *nest;
172 void *hdr;
173};
174
175struct devlink_dpipe_table_ops;
176
177/**
178 * struct devlink_dpipe_table - table object
179 * @priv: private
180 * @name: table name
181 * @size: maximum number of entries
182 * @counters_enabled: indicates if counters are active
183 * @counter_control_extern: indicates if counter control is in dpipe or
184 * external tool
185 * @table_ops: table operations
186 * @rcu: rcu
187 */
188struct devlink_dpipe_table {
189 void *priv;
190 struct list_head list;
191 const char *name;
192 u64 size;
193 bool counters_enabled;
194 bool counter_control_extern;
195 struct devlink_dpipe_table_ops *table_ops;
196 struct rcu_head rcu;
197};
198
199/**
200 * struct devlink_dpipe_table_ops - dpipe_table ops
201 * @actions_dump - dumps all tables actions
202 * @matches_dump - dumps all tables matches
203 * @entries_dump - dumps all active entries in the table
204 * @counters_set_update - when changing the counter status hardware sync
205 * maybe needed to allocate/free counter related
206 * resources
207 */
208struct devlink_dpipe_table_ops {
209 int (*actions_dump)(void *priv, struct sk_buff *skb);
210 int (*matches_dump)(void *priv, struct sk_buff *skb);
211 int (*entries_dump)(void *priv, bool counters_enabled,
212 struct devlink_dpipe_dump_ctx *dump_ctx);
213 int (*counters_set_update)(void *priv, bool enable);
214};
215
216/**
217 * struct devlink_dpipe_headers - dpipe headers
218 * @headers - header array can be shared (global bit) or driver specific
219 * @headers_count - count of headers
220 */
221struct devlink_dpipe_headers {
222 struct devlink_dpipe_header **headers;
223 unsigned int headers_count;
224};
225
226struct devlink_ops {
227 int (*port_type_set)(struct devlink_port *devlink_port,
228 enum devlink_port_type port_type);
229 int (*port_split)(struct devlink *devlink, unsigned int port_index,
230 unsigned int count);
231 int (*port_unsplit)(struct devlink *devlink, unsigned int port_index);
232 int (*sb_pool_get)(struct devlink *devlink, unsigned int sb_index,
233 u16 pool_index,
234 struct devlink_sb_pool_info *pool_info);
235 int (*sb_pool_set)(struct devlink *devlink, unsigned int sb_index,
236 u16 pool_index, u32 size,
237 enum devlink_sb_threshold_type threshold_type);
238 int (*sb_port_pool_get)(struct devlink_port *devlink_port,
239 unsigned int sb_index, u16 pool_index,
240 u32 *p_threshold);
241 int (*sb_port_pool_set)(struct devlink_port *devlink_port,
242 unsigned int sb_index, u16 pool_index,
243 u32 threshold);
244 int (*sb_tc_pool_bind_get)(struct devlink_port *devlink_port,
245 unsigned int sb_index,
246 u16 tc_index,
247 enum devlink_sb_pool_type pool_type,
248 u16 *p_pool_index, u32 *p_threshold);
249 int (*sb_tc_pool_bind_set)(struct devlink_port *devlink_port,
250 unsigned int sb_index,
251 u16 tc_index,
252 enum devlink_sb_pool_type pool_type,
253 u16 pool_index, u32 threshold);
254 int (*sb_occ_snapshot)(struct devlink *devlink,
255 unsigned int sb_index);
256 int (*sb_occ_max_clear)(struct devlink *devlink,
257 unsigned int sb_index);
258 int (*sb_occ_port_pool_get)(struct devlink_port *devlink_port,
259 unsigned int sb_index, u16 pool_index,
260 u32 *p_cur, u32 *p_max);
261 int (*sb_occ_tc_port_bind_get)(struct devlink_port *devlink_port,
262 unsigned int sb_index,
263 u16 tc_index,
264 enum devlink_sb_pool_type pool_type,
265 u32 *p_cur, u32 *p_max);
266
267 int (*eswitch_mode_get)(struct devlink *devlink, u16 *p_mode);
268 int (*eswitch_mode_set)(struct devlink *devlink, u16 mode);
269 int (*eswitch_inline_mode_get)(struct devlink *devlink, u8 *p_inline_mode);
270 int (*eswitch_inline_mode_set)(struct devlink *devlink, u8 inline_mode);
271 int (*eswitch_encap_mode_get)(struct devlink *devlink, u8 *p_encap_mode);
272 int (*eswitch_encap_mode_set)(struct devlink *devlink, u8 encap_mode);
273};
274
275static inline void *devlink_priv(struct devlink *devlink)
276{
277 BUG_ON(!devlink);
278 return &devlink->priv;
279}
280
281static inline struct devlink *priv_to_devlink(void *priv)
282{
283 BUG_ON(!priv);
284 return container_of(priv, struct devlink, priv);
285}
286
287struct ib_device;
288
289#if IS_ENABLED(CONFIG_NET_DEVLINK)
290
291struct devlink *devlink_alloc(const struct devlink_ops *ops, size_t priv_size);
292int devlink_register(struct devlink *devlink, struct device *dev);
293void devlink_unregister(struct devlink *devlink);
294void devlink_free(struct devlink *devlink);
295int devlink_port_register(struct devlink *devlink,
296 struct devlink_port *devlink_port,
297 unsigned int port_index);
298void devlink_port_unregister(struct devlink_port *devlink_port);
299void devlink_port_type_eth_set(struct devlink_port *devlink_port,
300 struct net_device *netdev);
301void devlink_port_type_ib_set(struct devlink_port *devlink_port,
302 struct ib_device *ibdev);
303void devlink_port_type_clear(struct devlink_port *devlink_port);
304void devlink_port_split_set(struct devlink_port *devlink_port,
305 u32 split_group);
306int devlink_sb_register(struct devlink *devlink, unsigned int sb_index,
307 u32 size, u16 ingress_pools_count,
308 u16 egress_pools_count, u16 ingress_tc_count,
309 u16 egress_tc_count);
310void devlink_sb_unregister(struct devlink *devlink, unsigned int sb_index);
311int devlink_dpipe_table_register(struct devlink *devlink,
312 const char *table_name,
313 struct devlink_dpipe_table_ops *table_ops,
314 void *priv, u64 size,
315 bool counter_control_extern);
316void devlink_dpipe_table_unregister(struct devlink *devlink,
317 const char *table_name);
318int devlink_dpipe_headers_register(struct devlink *devlink,
319 struct devlink_dpipe_headers *dpipe_headers);
320void devlink_dpipe_headers_unregister(struct devlink *devlink);
321bool devlink_dpipe_table_counter_enabled(struct devlink *devlink,
322 const char *table_name);
323int devlink_dpipe_entry_ctx_prepare(struct devlink_dpipe_dump_ctx *dump_ctx);
324int devlink_dpipe_entry_ctx_append(struct devlink_dpipe_dump_ctx *dump_ctx,
325 struct devlink_dpipe_entry *entry);
326int devlink_dpipe_entry_ctx_close(struct devlink_dpipe_dump_ctx *dump_ctx);
327int devlink_dpipe_action_put(struct sk_buff *skb,
328 struct devlink_dpipe_action *action);
329int devlink_dpipe_match_put(struct sk_buff *skb,
330 struct devlink_dpipe_match *match);
331
332#else
333
334static inline struct devlink *devlink_alloc(const struct devlink_ops *ops,
335 size_t priv_size)
336{
337 return kzalloc(sizeof(struct devlink) + priv_size, GFP_KERNEL);
338}
339
340static inline int devlink_register(struct devlink *devlink, struct device *dev)
341{
342 return 0;
343}
344
345static inline void devlink_unregister(struct devlink *devlink)
346{
347}
348
349static inline void devlink_free(struct devlink *devlink)
350{
351 kfree(devlink);
352}
353
354static inline int devlink_port_register(struct devlink *devlink,
355 struct devlink_port *devlink_port,
356 unsigned int port_index)
357{
358 return 0;
359}
360
361static inline void devlink_port_unregister(struct devlink_port *devlink_port)
362{
363}
364
365static inline void devlink_port_type_eth_set(struct devlink_port *devlink_port,
366 struct net_device *netdev)
367{
368}
369
370static inline void devlink_port_type_ib_set(struct devlink_port *devlink_port,
371 struct ib_device *ibdev)
372{
373}
374
375static inline void devlink_port_type_clear(struct devlink_port *devlink_port)
376{
377}
378
379static inline void devlink_port_split_set(struct devlink_port *devlink_port,
380 u32 split_group)
381{
382}
383
384static inline int devlink_sb_register(struct devlink *devlink,
385 unsigned int sb_index, u32 size,
386 u16 ingress_pools_count,
387 u16 egress_pools_count,
388 u16 ingress_tc_count,
389 u16 egress_tc_count)
390{
391 return 0;
392}
393
394static inline void devlink_sb_unregister(struct devlink *devlink,
395 unsigned int sb_index)
396{
397}
398
399static inline int
400devlink_dpipe_table_register(struct devlink *devlink,
401 const char *table_name,
402 struct devlink_dpipe_table_ops *table_ops,
403 void *priv, u64 size,
404 bool counter_control_extern)
405{
406 return 0;
407}
408
409static inline void devlink_dpipe_table_unregister(struct devlink *devlink,
410 const char *table_name)
411{
412}
413
414static inline int devlink_dpipe_headers_register(struct devlink *devlink,
415 struct devlink_dpipe_headers *
416 dpipe_headers)
417{
418 return 0;
419}
420
421static inline void devlink_dpipe_headers_unregister(struct devlink *devlink)
422{
423}
424
425static inline bool devlink_dpipe_table_counter_enabled(struct devlink *devlink,
426 const char *table_name)
427{
428 return false;
429}
430
431static inline int
432devlink_dpipe_entry_ctx_prepare(struct devlink_dpipe_dump_ctx *dump_ctx)
433{
434 return 0;
435}
436
437static inline int
438devlink_dpipe_entry_ctx_append(struct devlink_dpipe_dump_ctx *dump_ctx,
439 struct devlink_dpipe_entry *entry)
440{
441 return 0;
442}
443
444static inline int
445devlink_dpipe_entry_ctx_close(struct devlink_dpipe_dump_ctx *dump_ctx)
446{
447 return 0;
448}
449
450static inline int
451devlink_dpipe_action_put(struct sk_buff *skb,
452 struct devlink_dpipe_action *action)
453{
454 return 0;
455}
456
457static inline int
458devlink_dpipe_match_put(struct sk_buff *skb,
459 struct devlink_dpipe_match *match)
460{
461 return 0;
462}
463
464#endif
465
466#endif /* _NET_DEVLINK_H_ */