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 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 36 struct 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 48 struct 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 */ 61 struct 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 */ 77 struct 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 */ 93 struct 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 */ 108 struct 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 */ 126 struct 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 */ 148 struct 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 */ 167 struct 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 }; 174 175 struct 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 */ 188 struct 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 */ 208 struct 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 */ 221 struct devlink_dpipe_headers { 222 struct devlink_dpipe_header **headers; 223 unsigned int headers_count; 224 }; 225 226 struct 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 }; 272 273 static inline void *devlink_priv(struct devlink *devlink) 274 { 275 BUG_ON(!devlink); 276 return &devlink->priv; 277 } 278 279 static inline struct devlink *priv_to_devlink(void *priv) 280 { 281 BUG_ON(!priv); 282 return container_of(priv, struct devlink, priv); 283 } 284 285 struct ib_device; 286 287 #if IS_ENABLED(CONFIG_NET_DEVLINK) 288 289 struct devlink *devlink_alloc(const struct devlink_ops *ops, size_t priv_size); 290 int devlink_register(struct devlink *devlink, struct device *dev); 291 void devlink_unregister(struct devlink *devlink); 292 void devlink_free(struct devlink *devlink); 293 int devlink_port_register(struct devlink *devlink, 294 struct devlink_port *devlink_port, 295 unsigned int port_index); 296 void devlink_port_unregister(struct devlink_port *devlink_port); 297 void devlink_port_type_eth_set(struct devlink_port *devlink_port, 298 struct net_device *netdev); 299 void devlink_port_type_ib_set(struct devlink_port *devlink_port, 300 struct ib_device *ibdev); 301 void devlink_port_type_clear(struct devlink_port *devlink_port); 302 void devlink_port_split_set(struct devlink_port *devlink_port, 303 u32 split_group); 304 int devlink_sb_register(struct devlink *devlink, unsigned int sb_index, 305 u32 size, u16 ingress_pools_count, 306 u16 egress_pools_count, u16 ingress_tc_count, 307 u16 egress_tc_count); 308 void devlink_sb_unregister(struct devlink *devlink, unsigned int sb_index); 309 int devlink_dpipe_table_register(struct devlink *devlink, 310 const char *table_name, 311 struct devlink_dpipe_table_ops *table_ops, 312 void *priv, u64 size, 313 bool counter_control_extern); 314 void devlink_dpipe_table_unregister(struct devlink *devlink, 315 const char *table_name); 316 int devlink_dpipe_headers_register(struct devlink *devlink, 317 struct devlink_dpipe_headers *dpipe_headers); 318 void devlink_dpipe_headers_unregister(struct devlink *devlink); 319 bool devlink_dpipe_table_counter_enabled(struct devlink *devlink, 320 const char *table_name); 321 int devlink_dpipe_entry_ctx_prepare(struct devlink_dpipe_dump_ctx *dump_ctx); 322 int devlink_dpipe_entry_ctx_append(struct devlink_dpipe_dump_ctx *dump_ctx, 323 struct devlink_dpipe_entry *entry); 324 int devlink_dpipe_entry_ctx_close(struct devlink_dpipe_dump_ctx *dump_ctx); 325 int devlink_dpipe_action_put(struct sk_buff *skb, 326 struct devlink_dpipe_action *action); 327 int devlink_dpipe_match_put(struct sk_buff *skb, 328 struct devlink_dpipe_match *match); 329 330 #else 331 332 static inline struct devlink *devlink_alloc(const struct devlink_ops *ops, 333 size_t priv_size) 334 { 335 return kzalloc(sizeof(struct devlink) + priv_size, GFP_KERNEL); 336 } 337 338 static inline int devlink_register(struct devlink *devlink, struct device *dev) 339 { 340 return 0; 341 } 342 343 static inline void devlink_unregister(struct devlink *devlink) 344 { 345 } 346 347 static inline void devlink_free(struct devlink *devlink) 348 { 349 kfree(devlink); 350 } 351 352 static inline int devlink_port_register(struct devlink *devlink, 353 struct devlink_port *devlink_port, 354 unsigned int port_index) 355 { 356 return 0; 357 } 358 359 static inline void devlink_port_unregister(struct devlink_port *devlink_port) 360 { 361 } 362 363 static inline void devlink_port_type_eth_set(struct devlink_port *devlink_port, 364 struct net_device *netdev) 365 { 366 } 367 368 static inline void devlink_port_type_ib_set(struct devlink_port *devlink_port, 369 struct ib_device *ibdev) 370 { 371 } 372 373 static inline void devlink_port_type_clear(struct devlink_port *devlink_port) 374 { 375 } 376 377 static inline void devlink_port_split_set(struct devlink_port *devlink_port, 378 u32 split_group) 379 { 380 } 381 382 static inline int devlink_sb_register(struct devlink *devlink, 383 unsigned int sb_index, u32 size, 384 u16 ingress_pools_count, 385 u16 egress_pools_count, 386 u16 ingress_tc_count, 387 u16 egress_tc_count) 388 { 389 return 0; 390 } 391 392 static inline void devlink_sb_unregister(struct devlink *devlink, 393 unsigned int sb_index) 394 { 395 } 396 397 static inline int 398 devlink_dpipe_table_register(struct devlink *devlink, 399 const char *table_name, 400 struct devlink_dpipe_table_ops *table_ops, 401 void *priv, u64 size, 402 bool counter_control_extern) 403 { 404 return 0; 405 } 406 407 static inline void devlink_dpipe_table_unregister(struct devlink *devlink, 408 const char *table_name) 409 { 410 } 411 412 static inline int devlink_dpipe_headers_register(struct devlink *devlink, 413 struct devlink_dpipe_headers * 414 dpipe_headers) 415 { 416 return 0; 417 } 418 419 static inline void devlink_dpipe_headers_unregister(struct devlink *devlink) 420 { 421 } 422 423 static inline bool devlink_dpipe_table_counter_enabled(struct devlink *devlink, 424 const char *table_name) 425 { 426 return false; 427 } 428 429 static inline int 430 devlink_dpipe_entry_ctx_prepare(struct devlink_dpipe_dump_ctx *dump_ctx) 431 { 432 return 0; 433 } 434 435 static inline int 436 devlink_dpipe_entry_ctx_append(struct devlink_dpipe_dump_ctx *dump_ctx, 437 struct devlink_dpipe_entry *entry) 438 { 439 return 0; 440 } 441 442 static inline int 443 devlink_dpipe_entry_ctx_close(struct devlink_dpipe_dump_ctx *dump_ctx) 444 { 445 return 0; 446 } 447 448 static inline int 449 devlink_dpipe_action_put(struct sk_buff *skb, 450 struct devlink_dpipe_action *action) 451 { 452 return 0; 453 } 454 455 static inline int 456 devlink_dpipe_match_put(struct sk_buff *skb, 457 struct devlink_dpipe_match *match) 458 { 459 return 0; 460 } 461 462 #endif 463 464 #endif /* _NET_DEVLINK_H_ */ 465