1 /* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 */ 2 /* Copyright (c) 2015-2018 Mellanox Technologies. All rights reserved */ 3 4 #ifndef _MLXSW_CORE_H 5 #define _MLXSW_CORE_H 6 7 #include <linux/module.h> 8 #include <linux/device.h> 9 #include <linux/slab.h> 10 #include <linux/gfp.h> 11 #include <linux/types.h> 12 #include <linux/skbuff.h> 13 #include <linux/workqueue.h> 14 #include <linux/net_namespace.h> 15 #include <net/devlink.h> 16 17 #include "trap.h" 18 #include "reg.h" 19 #include "cmd.h" 20 #include "resources.h" 21 22 enum mlxsw_core_resource_id { 23 MLXSW_CORE_RESOURCE_PORTS = 1, 24 MLXSW_CORE_RESOURCE_MAX, 25 }; 26 27 struct mlxsw_core; 28 struct mlxsw_core_port; 29 struct mlxsw_driver; 30 struct mlxsw_bus; 31 struct mlxsw_bus_info; 32 struct mlxsw_fw_rev; 33 34 unsigned int mlxsw_core_max_ports(const struct mlxsw_core *mlxsw_core); 35 36 void *mlxsw_core_driver_priv(struct mlxsw_core *mlxsw_core); 37 38 bool mlxsw_core_res_query_enabled(const struct mlxsw_core *mlxsw_core); 39 40 bool mlxsw_core_temp_warn_enabled(const struct mlxsw_core *mlxsw_core); 41 42 bool 43 mlxsw_core_fw_rev_minor_subminor_validate(const struct mlxsw_fw_rev *rev, 44 const struct mlxsw_fw_rev *req_rev); 45 46 int mlxsw_core_driver_register(struct mlxsw_driver *mlxsw_driver); 47 void mlxsw_core_driver_unregister(struct mlxsw_driver *mlxsw_driver); 48 49 int mlxsw_core_bus_device_register(const struct mlxsw_bus_info *mlxsw_bus_info, 50 const struct mlxsw_bus *mlxsw_bus, 51 void *bus_priv, bool reload, 52 struct devlink *devlink, 53 struct netlink_ext_ack *extack); 54 void mlxsw_core_bus_device_unregister(struct mlxsw_core *mlxsw_core, bool reload); 55 56 struct mlxsw_tx_info { 57 u16 local_port; 58 bool is_emad; 59 }; 60 61 struct mlxsw_rx_md_info { 62 u32 cookie_index; 63 u32 latency; 64 u32 tx_congestion; 65 union { 66 /* Valid when 'tx_port_valid' is set. */ 67 u16 tx_sys_port; 68 u16 tx_lag_id; 69 }; 70 u16 tx_lag_port_index; /* Valid when 'tx_port_is_lag' is set. */ 71 u8 tx_tc; 72 u8 latency_valid:1, 73 tx_congestion_valid:1, 74 tx_tc_valid:1, 75 tx_port_valid:1, 76 tx_port_is_lag:1, 77 unused:3; 78 }; 79 80 bool mlxsw_core_skb_transmit_busy(struct mlxsw_core *mlxsw_core, 81 const struct mlxsw_tx_info *tx_info); 82 int mlxsw_core_skb_transmit(struct mlxsw_core *mlxsw_core, struct sk_buff *skb, 83 const struct mlxsw_tx_info *tx_info); 84 void mlxsw_core_ptp_transmitted(struct mlxsw_core *mlxsw_core, 85 struct sk_buff *skb, u16 local_port); 86 87 struct mlxsw_rx_listener { 88 void (*func)(struct sk_buff *skb, u16 local_port, void *priv); 89 u16 local_port; 90 u8 mirror_reason; 91 u16 trap_id; 92 }; 93 94 struct mlxsw_event_listener { 95 void (*func)(const struct mlxsw_reg_info *reg, 96 char *payload, void *priv); 97 enum mlxsw_event_trap_id trap_id; 98 }; 99 100 struct mlxsw_listener { 101 u16 trap_id; 102 union { 103 struct mlxsw_rx_listener rx_listener; 104 struct mlxsw_event_listener event_listener; 105 }; 106 enum mlxsw_reg_hpkt_action en_action; /* Action when enabled */ 107 enum mlxsw_reg_hpkt_action dis_action; /* Action when disabled */ 108 u8 en_trap_group; /* Trap group when enabled */ 109 u8 dis_trap_group; /* Trap group when disabled */ 110 u8 is_ctrl:1, /* should go via control buffer or not */ 111 is_event:1, 112 enabled_on_register:1; /* Trap should be enabled when listener 113 * is registered. 114 */ 115 }; 116 117 #define __MLXSW_RXL(_func, _trap_id, _en_action, _is_ctrl, _en_trap_group, \ 118 _dis_action, _enabled_on_register, _dis_trap_group, \ 119 _mirror_reason) \ 120 { \ 121 .trap_id = MLXSW_TRAP_ID_##_trap_id, \ 122 .rx_listener = \ 123 { \ 124 .func = _func, \ 125 .local_port = MLXSW_PORT_DONT_CARE, \ 126 .mirror_reason = _mirror_reason, \ 127 .trap_id = MLXSW_TRAP_ID_##_trap_id, \ 128 }, \ 129 .en_action = MLXSW_REG_HPKT_ACTION_##_en_action, \ 130 .dis_action = MLXSW_REG_HPKT_ACTION_##_dis_action, \ 131 .en_trap_group = MLXSW_REG_HTGT_TRAP_GROUP_##_en_trap_group, \ 132 .dis_trap_group = MLXSW_REG_HTGT_TRAP_GROUP_##_dis_trap_group, \ 133 .is_ctrl = _is_ctrl, \ 134 .enabled_on_register = _enabled_on_register, \ 135 } 136 137 #define MLXSW_RXL(_func, _trap_id, _en_action, _is_ctrl, _trap_group, \ 138 _dis_action) \ 139 __MLXSW_RXL(_func, _trap_id, _en_action, _is_ctrl, _trap_group, \ 140 _dis_action, true, _trap_group, 0) 141 142 #define MLXSW_RXL_DIS(_func, _trap_id, _en_action, _is_ctrl, _en_trap_group, \ 143 _dis_action, _dis_trap_group) \ 144 __MLXSW_RXL(_func, _trap_id, _en_action, _is_ctrl, _en_trap_group, \ 145 _dis_action, false, _dis_trap_group, 0) 146 147 #define MLXSW_RXL_MIRROR(_func, _session_id, _trap_group, _mirror_reason) \ 148 __MLXSW_RXL(_func, MIRROR_SESSION##_session_id, TRAP_TO_CPU, false, \ 149 _trap_group, TRAP_TO_CPU, true, _trap_group, \ 150 _mirror_reason) 151 152 #define MLXSW_EVENTL(_func, _trap_id, _trap_group) \ 153 { \ 154 .trap_id = MLXSW_TRAP_ID_##_trap_id, \ 155 .event_listener = \ 156 { \ 157 .func = _func, \ 158 .trap_id = MLXSW_TRAP_ID_##_trap_id, \ 159 }, \ 160 .en_action = MLXSW_REG_HPKT_ACTION_TRAP_TO_CPU, \ 161 .en_trap_group = MLXSW_REG_HTGT_TRAP_GROUP_##_trap_group, \ 162 .is_event = true, \ 163 .enabled_on_register = true, \ 164 } 165 166 int mlxsw_core_rx_listener_register(struct mlxsw_core *mlxsw_core, 167 const struct mlxsw_rx_listener *rxl, 168 void *priv, bool enabled); 169 void mlxsw_core_rx_listener_unregister(struct mlxsw_core *mlxsw_core, 170 const struct mlxsw_rx_listener *rxl); 171 172 int mlxsw_core_event_listener_register(struct mlxsw_core *mlxsw_core, 173 const struct mlxsw_event_listener *el, 174 void *priv); 175 void mlxsw_core_event_listener_unregister(struct mlxsw_core *mlxsw_core, 176 const struct mlxsw_event_listener *el); 177 178 int mlxsw_core_trap_register(struct mlxsw_core *mlxsw_core, 179 const struct mlxsw_listener *listener, 180 void *priv); 181 void mlxsw_core_trap_unregister(struct mlxsw_core *mlxsw_core, 182 const struct mlxsw_listener *listener, 183 void *priv); 184 int mlxsw_core_trap_state_set(struct mlxsw_core *mlxsw_core, 185 const struct mlxsw_listener *listener, 186 bool enabled); 187 188 typedef void mlxsw_reg_trans_cb_t(struct mlxsw_core *mlxsw_core, char *payload, 189 size_t payload_len, unsigned long cb_priv); 190 191 int mlxsw_reg_trans_query(struct mlxsw_core *mlxsw_core, 192 const struct mlxsw_reg_info *reg, char *payload, 193 struct list_head *bulk_list, 194 mlxsw_reg_trans_cb_t *cb, unsigned long cb_priv); 195 int mlxsw_reg_trans_write(struct mlxsw_core *mlxsw_core, 196 const struct mlxsw_reg_info *reg, char *payload, 197 struct list_head *bulk_list, 198 mlxsw_reg_trans_cb_t *cb, unsigned long cb_priv); 199 int mlxsw_reg_trans_bulk_wait(struct list_head *bulk_list); 200 201 int mlxsw_reg_query(struct mlxsw_core *mlxsw_core, 202 const struct mlxsw_reg_info *reg, char *payload); 203 int mlxsw_reg_write(struct mlxsw_core *mlxsw_core, 204 const struct mlxsw_reg_info *reg, char *payload); 205 206 struct mlxsw_rx_info { 207 bool is_lag; 208 union { 209 u16 sys_port; 210 u16 lag_id; 211 } u; 212 u16 lag_port_index; 213 u8 mirror_reason; 214 int trap_id; 215 }; 216 217 void mlxsw_core_skb_receive(struct mlxsw_core *mlxsw_core, struct sk_buff *skb, 218 struct mlxsw_rx_info *rx_info); 219 220 void mlxsw_core_lag_mapping_set(struct mlxsw_core *mlxsw_core, 221 u16 lag_id, u8 port_index, u16 local_port); 222 u16 mlxsw_core_lag_mapping_get(struct mlxsw_core *mlxsw_core, 223 u16 lag_id, u8 port_index); 224 void mlxsw_core_lag_mapping_clear(struct mlxsw_core *mlxsw_core, 225 u16 lag_id, u16 local_port); 226 227 void *mlxsw_core_port_driver_priv(struct mlxsw_core_port *mlxsw_core_port); 228 int mlxsw_core_port_init(struct mlxsw_core *mlxsw_core, u16 local_port, 229 u32 port_number, bool split, u32 split_port_subnumber, 230 bool splittable, u32 lanes, 231 const unsigned char *switch_id, 232 unsigned char switch_id_len); 233 void mlxsw_core_port_fini(struct mlxsw_core *mlxsw_core, u16 local_port); 234 int mlxsw_core_cpu_port_init(struct mlxsw_core *mlxsw_core, 235 void *port_driver_priv, 236 const unsigned char *switch_id, 237 unsigned char switch_id_len); 238 void mlxsw_core_cpu_port_fini(struct mlxsw_core *mlxsw_core); 239 void mlxsw_core_port_eth_set(struct mlxsw_core *mlxsw_core, u16 local_port, 240 void *port_driver_priv, struct net_device *dev); 241 void mlxsw_core_port_ib_set(struct mlxsw_core *mlxsw_core, u16 local_port, 242 void *port_driver_priv); 243 void mlxsw_core_port_clear(struct mlxsw_core *mlxsw_core, u16 local_port, 244 void *port_driver_priv); 245 enum devlink_port_type mlxsw_core_port_type_get(struct mlxsw_core *mlxsw_core, 246 u16 local_port); 247 struct devlink_port * 248 mlxsw_core_port_devlink_port_get(struct mlxsw_core *mlxsw_core, 249 u16 local_port); 250 bool mlxsw_core_port_is_xm(const struct mlxsw_core *mlxsw_core, u16 local_port); 251 struct mlxsw_env *mlxsw_core_env(const struct mlxsw_core *mlxsw_core); 252 253 int mlxsw_core_schedule_dw(struct delayed_work *dwork, unsigned long delay); 254 bool mlxsw_core_schedule_work(struct work_struct *work); 255 void mlxsw_core_flush_owq(void); 256 int mlxsw_core_resources_query(struct mlxsw_core *mlxsw_core, char *mbox, 257 struct mlxsw_res *res); 258 259 #define MLXSW_CONFIG_PROFILE_SWID_COUNT 8 260 261 struct mlxsw_swid_config { 262 u8 used_type:1, 263 used_properties:1; 264 u8 type; 265 u8 properties; 266 }; 267 268 struct mlxsw_config_profile { 269 u16 used_max_vepa_channels:1, 270 used_max_mid:1, 271 used_max_pgt:1, 272 used_max_system_port:1, 273 used_max_vlan_groups:1, 274 used_max_regions:1, 275 used_flood_tables:1, 276 used_flood_mode:1, 277 used_max_ib_mc:1, 278 used_max_pkey:1, 279 used_ar_sec:1, 280 used_adaptive_routing_group_cap:1, 281 used_kvd_sizes:1, 282 used_kvh_xlt_cache_mode:1; 283 u8 max_vepa_channels; 284 u16 max_mid; 285 u16 max_pgt; 286 u16 max_system_port; 287 u16 max_vlan_groups; 288 u16 max_regions; 289 u8 max_flood_tables; 290 u8 max_vid_flood_tables; 291 u8 flood_mode; 292 u8 max_fid_offset_flood_tables; 293 u16 fid_offset_flood_table_size; 294 u8 max_fid_flood_tables; 295 u16 fid_flood_table_size; 296 u16 max_ib_mc; 297 u16 max_pkey; 298 u8 ar_sec; 299 u16 adaptive_routing_group_cap; 300 u8 arn; 301 u32 kvd_linear_size; 302 u8 kvd_hash_single_parts; 303 u8 kvd_hash_double_parts; 304 u8 kvh_xlt_cache_mode; 305 struct mlxsw_swid_config swid_config[MLXSW_CONFIG_PROFILE_SWID_COUNT]; 306 }; 307 308 struct mlxsw_driver { 309 struct list_head list; 310 const char *kind; 311 size_t priv_size; 312 const struct mlxsw_fw_rev *fw_req_rev; 313 const char *fw_filename; 314 int (*init)(struct mlxsw_core *mlxsw_core, 315 const struct mlxsw_bus_info *mlxsw_bus_info, 316 struct netlink_ext_ack *extack); 317 void (*fini)(struct mlxsw_core *mlxsw_core); 318 int (*basic_trap_groups_set)(struct mlxsw_core *mlxsw_core); 319 int (*port_type_set)(struct mlxsw_core *mlxsw_core, u16 local_port, 320 enum devlink_port_type new_type); 321 int (*port_split)(struct mlxsw_core *mlxsw_core, u16 local_port, 322 unsigned int count, struct netlink_ext_ack *extack); 323 int (*port_unsplit)(struct mlxsw_core *mlxsw_core, u16 local_port, 324 struct netlink_ext_ack *extack); 325 int (*sb_pool_get)(struct mlxsw_core *mlxsw_core, 326 unsigned int sb_index, u16 pool_index, 327 struct devlink_sb_pool_info *pool_info); 328 int (*sb_pool_set)(struct mlxsw_core *mlxsw_core, 329 unsigned int sb_index, u16 pool_index, u32 size, 330 enum devlink_sb_threshold_type threshold_type, 331 struct netlink_ext_ack *extack); 332 int (*sb_port_pool_get)(struct mlxsw_core_port *mlxsw_core_port, 333 unsigned int sb_index, u16 pool_index, 334 u32 *p_threshold); 335 int (*sb_port_pool_set)(struct mlxsw_core_port *mlxsw_core_port, 336 unsigned int sb_index, u16 pool_index, 337 u32 threshold, struct netlink_ext_ack *extack); 338 int (*sb_tc_pool_bind_get)(struct mlxsw_core_port *mlxsw_core_port, 339 unsigned int sb_index, u16 tc_index, 340 enum devlink_sb_pool_type pool_type, 341 u16 *p_pool_index, u32 *p_threshold); 342 int (*sb_tc_pool_bind_set)(struct mlxsw_core_port *mlxsw_core_port, 343 unsigned int sb_index, u16 tc_index, 344 enum devlink_sb_pool_type pool_type, 345 u16 pool_index, u32 threshold, 346 struct netlink_ext_ack *extack); 347 int (*sb_occ_snapshot)(struct mlxsw_core *mlxsw_core, 348 unsigned int sb_index); 349 int (*sb_occ_max_clear)(struct mlxsw_core *mlxsw_core, 350 unsigned int sb_index); 351 int (*sb_occ_port_pool_get)(struct mlxsw_core_port *mlxsw_core_port, 352 unsigned int sb_index, u16 pool_index, 353 u32 *p_cur, u32 *p_max); 354 int (*sb_occ_tc_port_bind_get)(struct mlxsw_core_port *mlxsw_core_port, 355 unsigned int sb_index, u16 tc_index, 356 enum devlink_sb_pool_type pool_type, 357 u32 *p_cur, u32 *p_max); 358 int (*trap_init)(struct mlxsw_core *mlxsw_core, 359 const struct devlink_trap *trap, void *trap_ctx); 360 void (*trap_fini)(struct mlxsw_core *mlxsw_core, 361 const struct devlink_trap *trap, void *trap_ctx); 362 int (*trap_action_set)(struct mlxsw_core *mlxsw_core, 363 const struct devlink_trap *trap, 364 enum devlink_trap_action action, 365 struct netlink_ext_ack *extack); 366 int (*trap_group_init)(struct mlxsw_core *mlxsw_core, 367 const struct devlink_trap_group *group); 368 int (*trap_group_set)(struct mlxsw_core *mlxsw_core, 369 const struct devlink_trap_group *group, 370 const struct devlink_trap_policer *policer, 371 struct netlink_ext_ack *extack); 372 int (*trap_policer_init)(struct mlxsw_core *mlxsw_core, 373 const struct devlink_trap_policer *policer); 374 void (*trap_policer_fini)(struct mlxsw_core *mlxsw_core, 375 const struct devlink_trap_policer *policer); 376 int (*trap_policer_set)(struct mlxsw_core *mlxsw_core, 377 const struct devlink_trap_policer *policer, 378 u64 rate, u64 burst, 379 struct netlink_ext_ack *extack); 380 int (*trap_policer_counter_get)(struct mlxsw_core *mlxsw_core, 381 const struct devlink_trap_policer *policer, 382 u64 *p_drops); 383 void (*txhdr_construct)(struct sk_buff *skb, 384 const struct mlxsw_tx_info *tx_info); 385 int (*resources_register)(struct mlxsw_core *mlxsw_core); 386 int (*kvd_sizes_get)(struct mlxsw_core *mlxsw_core, 387 const struct mlxsw_config_profile *profile, 388 u64 *p_single_size, u64 *p_double_size, 389 u64 *p_linear_size); 390 int (*params_register)(struct mlxsw_core *mlxsw_core); 391 void (*params_unregister)(struct mlxsw_core *mlxsw_core); 392 393 /* Notify a driver that a timestamped packet was transmitted. Driver 394 * is responsible for freeing the passed-in SKB. 395 */ 396 void (*ptp_transmitted)(struct mlxsw_core *mlxsw_core, 397 struct sk_buff *skb, u16 local_port); 398 399 u8 txhdr_len; 400 const struct mlxsw_config_profile *profile; 401 bool res_query_enabled; 402 bool fw_fatal_enabled; 403 bool temp_warn_enabled; 404 }; 405 406 int mlxsw_core_kvd_sizes_get(struct mlxsw_core *mlxsw_core, 407 const struct mlxsw_config_profile *profile, 408 u64 *p_single_size, u64 *p_double_size, 409 u64 *p_linear_size); 410 411 u32 mlxsw_core_read_frc_h(struct mlxsw_core *mlxsw_core); 412 u32 mlxsw_core_read_frc_l(struct mlxsw_core *mlxsw_core); 413 414 void mlxsw_core_emad_string_tlv_enable(struct mlxsw_core *mlxsw_core); 415 416 bool mlxsw_core_res_valid(struct mlxsw_core *mlxsw_core, 417 enum mlxsw_res_id res_id); 418 419 #define MLXSW_CORE_RES_VALID(mlxsw_core, short_res_id) \ 420 mlxsw_core_res_valid(mlxsw_core, MLXSW_RES_ID_##short_res_id) 421 422 u64 mlxsw_core_res_get(struct mlxsw_core *mlxsw_core, 423 enum mlxsw_res_id res_id); 424 425 #define MLXSW_CORE_RES_GET(mlxsw_core, short_res_id) \ 426 mlxsw_core_res_get(mlxsw_core, MLXSW_RES_ID_##short_res_id) 427 428 static inline struct net *mlxsw_core_net(struct mlxsw_core *mlxsw_core) 429 { 430 return devlink_net(priv_to_devlink(mlxsw_core)); 431 } 432 433 #define MLXSW_BUS_F_TXRX BIT(0) 434 #define MLXSW_BUS_F_RESET BIT(1) 435 436 struct mlxsw_bus { 437 const char *kind; 438 int (*init)(void *bus_priv, struct mlxsw_core *mlxsw_core, 439 const struct mlxsw_config_profile *profile, 440 struct mlxsw_res *res); 441 void (*fini)(void *bus_priv); 442 bool (*skb_transmit_busy)(void *bus_priv, 443 const struct mlxsw_tx_info *tx_info); 444 int (*skb_transmit)(void *bus_priv, struct sk_buff *skb, 445 const struct mlxsw_tx_info *tx_info); 446 int (*cmd_exec)(void *bus_priv, u16 opcode, u8 opcode_mod, 447 u32 in_mod, bool out_mbox_direct, 448 char *in_mbox, size_t in_mbox_size, 449 char *out_mbox, size_t out_mbox_size, 450 u8 *p_status); 451 u32 (*read_frc_h)(void *bus_priv); 452 u32 (*read_frc_l)(void *bus_priv); 453 u8 features; 454 }; 455 456 struct mlxsw_fw_rev { 457 u16 major; 458 u16 minor; 459 u16 subminor; 460 u16 can_reset_minor; 461 }; 462 463 #define MLXSW_BUS_INFO_XM_LOCAL_PORTS_MAX 4 464 465 struct mlxsw_bus_info { 466 const char *device_kind; 467 const char *device_name; 468 struct device *dev; 469 struct mlxsw_fw_rev fw_rev; 470 u8 vsd[MLXSW_CMD_BOARDINFO_VSD_LEN]; 471 u8 psid[MLXSW_CMD_BOARDINFO_PSID_LEN]; 472 u8 low_frequency:1, 473 read_frc_capable:1, 474 xm_exists:1; 475 u8 xm_local_ports_count; 476 u8 xm_local_ports[MLXSW_BUS_INFO_XM_LOCAL_PORTS_MAX]; 477 }; 478 479 struct mlxsw_hwmon; 480 481 #ifdef CONFIG_MLXSW_CORE_HWMON 482 483 int mlxsw_hwmon_init(struct mlxsw_core *mlxsw_core, 484 const struct mlxsw_bus_info *mlxsw_bus_info, 485 struct mlxsw_hwmon **p_hwmon); 486 void mlxsw_hwmon_fini(struct mlxsw_hwmon *mlxsw_hwmon); 487 488 #else 489 490 static inline int mlxsw_hwmon_init(struct mlxsw_core *mlxsw_core, 491 const struct mlxsw_bus_info *mlxsw_bus_info, 492 struct mlxsw_hwmon **p_hwmon) 493 { 494 return 0; 495 } 496 497 static inline void mlxsw_hwmon_fini(struct mlxsw_hwmon *mlxsw_hwmon) 498 { 499 } 500 501 #endif 502 503 struct mlxsw_thermal; 504 505 #ifdef CONFIG_MLXSW_CORE_THERMAL 506 507 int mlxsw_thermal_init(struct mlxsw_core *mlxsw_core, 508 const struct mlxsw_bus_info *mlxsw_bus_info, 509 struct mlxsw_thermal **p_thermal); 510 void mlxsw_thermal_fini(struct mlxsw_thermal *thermal); 511 512 #else 513 514 static inline int mlxsw_thermal_init(struct mlxsw_core *mlxsw_core, 515 const struct mlxsw_bus_info *mlxsw_bus_info, 516 struct mlxsw_thermal **p_thermal) 517 { 518 return 0; 519 } 520 521 static inline void mlxsw_thermal_fini(struct mlxsw_thermal *thermal) 522 { 523 } 524 525 #endif 526 527 enum mlxsw_devlink_param_id { 528 MLXSW_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX, 529 MLXSW_DEVLINK_PARAM_ID_ACL_REGION_REHASH_INTERVAL, 530 }; 531 532 struct mlxsw_skb_cb { 533 union { 534 struct mlxsw_tx_info tx_info; 535 struct mlxsw_rx_md_info rx_md_info; 536 }; 537 }; 538 539 static inline struct mlxsw_skb_cb *mlxsw_skb_cb(struct sk_buff *skb) 540 { 541 BUILD_BUG_ON(sizeof(mlxsw_skb_cb) > sizeof(skb->cb)); 542 return (struct mlxsw_skb_cb *) skb->cb; 543 } 544 545 #endif 546