1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 2 /* Copyright (c) 2016-2018 Mellanox Technologies. All rights reserved */ 3 4 #include <linux/kernel.h> 5 #include <linux/types.h> 6 #include <linux/rhashtable.h> 7 #include <linux/bitops.h> 8 #include <linux/in6.h> 9 #include <linux/notifier.h> 10 #include <linux/inetdevice.h> 11 #include <linux/netdevice.h> 12 #include <linux/if_bridge.h> 13 #include <linux/socket.h> 14 #include <linux/route.h> 15 #include <linux/gcd.h> 16 #include <linux/if_macvlan.h> 17 #include <linux/refcount.h> 18 #include <linux/jhash.h> 19 #include <linux/net_namespace.h> 20 #include <linux/mutex.h> 21 #include <linux/genalloc.h> 22 #include <net/netevent.h> 23 #include <net/neighbour.h> 24 #include <net/arp.h> 25 #include <net/inet_dscp.h> 26 #include <net/ip_fib.h> 27 #include <net/ip6_fib.h> 28 #include <net/nexthop.h> 29 #include <net/fib_rules.h> 30 #include <net/ip_tunnels.h> 31 #include <net/l3mdev.h> 32 #include <net/addrconf.h> 33 #include <net/ndisc.h> 34 #include <net/ipv6.h> 35 #include <net/fib_notifier.h> 36 #include <net/switchdev.h> 37 38 #include "spectrum.h" 39 #include "core.h" 40 #include "reg.h" 41 #include "spectrum_cnt.h" 42 #include "spectrum_dpipe.h" 43 #include "spectrum_ipip.h" 44 #include "spectrum_mr.h" 45 #include "spectrum_mr_tcam.h" 46 #include "spectrum_router.h" 47 #include "spectrum_span.h" 48 49 struct mlxsw_sp_fib; 50 struct mlxsw_sp_vr; 51 struct mlxsw_sp_lpm_tree; 52 struct mlxsw_sp_rif_ops; 53 54 struct mlxsw_sp_rif { 55 struct list_head nexthop_list; 56 struct list_head neigh_list; 57 struct net_device *dev; /* NULL for underlay RIF */ 58 struct mlxsw_sp_fid *fid; 59 unsigned char addr[ETH_ALEN]; 60 int mtu; 61 u16 rif_index; 62 u8 mac_profile_id; 63 u8 rif_entries; 64 u16 vr_id; 65 const struct mlxsw_sp_rif_ops *ops; 66 struct mlxsw_sp *mlxsw_sp; 67 68 unsigned int counter_ingress; 69 bool counter_ingress_valid; 70 unsigned int counter_egress; 71 bool counter_egress_valid; 72 }; 73 74 struct mlxsw_sp_rif_params { 75 struct net_device *dev; 76 union { 77 u16 system_port; 78 u16 lag_id; 79 }; 80 u16 vid; 81 bool lag; 82 bool double_entry; 83 }; 84 85 struct mlxsw_sp_rif_subport { 86 struct mlxsw_sp_rif common; 87 refcount_t ref_count; 88 union { 89 u16 system_port; 90 u16 lag_id; 91 }; 92 u16 vid; 93 bool lag; 94 }; 95 96 struct mlxsw_sp_rif_ipip_lb { 97 struct mlxsw_sp_rif common; 98 struct mlxsw_sp_rif_ipip_lb_config lb_config; 99 u16 ul_vr_id; /* Reserved for Spectrum-2. */ 100 u16 ul_rif_id; /* Reserved for Spectrum. */ 101 }; 102 103 struct mlxsw_sp_rif_params_ipip_lb { 104 struct mlxsw_sp_rif_params common; 105 struct mlxsw_sp_rif_ipip_lb_config lb_config; 106 }; 107 108 struct mlxsw_sp_rif_ops { 109 enum mlxsw_sp_rif_type type; 110 size_t rif_size; 111 112 void (*setup)(struct mlxsw_sp_rif *rif, 113 const struct mlxsw_sp_rif_params *params); 114 int (*configure)(struct mlxsw_sp_rif *rif, 115 struct netlink_ext_ack *extack); 116 void (*deconfigure)(struct mlxsw_sp_rif *rif); 117 struct mlxsw_sp_fid * (*fid_get)(struct mlxsw_sp_rif *rif, 118 struct netlink_ext_ack *extack); 119 void (*fdb_del)(struct mlxsw_sp_rif *rif, const char *mac); 120 }; 121 122 struct mlxsw_sp_rif_mac_profile { 123 unsigned char mac_prefix[ETH_ALEN]; 124 refcount_t ref_count; 125 u8 id; 126 }; 127 128 struct mlxsw_sp_router_ops { 129 int (*init)(struct mlxsw_sp *mlxsw_sp); 130 int (*ipips_init)(struct mlxsw_sp *mlxsw_sp); 131 }; 132 133 static struct mlxsw_sp_rif * 134 mlxsw_sp_rif_find_by_dev(const struct mlxsw_sp *mlxsw_sp, 135 const struct net_device *dev); 136 static void mlxsw_sp_rif_destroy(struct mlxsw_sp_rif *rif); 137 static void mlxsw_sp_lpm_tree_hold(struct mlxsw_sp_lpm_tree *lpm_tree); 138 static void mlxsw_sp_lpm_tree_put(struct mlxsw_sp *mlxsw_sp, 139 struct mlxsw_sp_lpm_tree *lpm_tree); 140 static int mlxsw_sp_vr_lpm_tree_bind(struct mlxsw_sp *mlxsw_sp, 141 const struct mlxsw_sp_fib *fib, 142 u8 tree_id); 143 static int mlxsw_sp_vr_lpm_tree_unbind(struct mlxsw_sp *mlxsw_sp, 144 const struct mlxsw_sp_fib *fib); 145 146 static unsigned int * 147 mlxsw_sp_rif_p_counter_get(struct mlxsw_sp_rif *rif, 148 enum mlxsw_sp_rif_counter_dir dir) 149 { 150 switch (dir) { 151 case MLXSW_SP_RIF_COUNTER_EGRESS: 152 return &rif->counter_egress; 153 case MLXSW_SP_RIF_COUNTER_INGRESS: 154 return &rif->counter_ingress; 155 } 156 return NULL; 157 } 158 159 static bool 160 mlxsw_sp_rif_counter_valid_get(struct mlxsw_sp_rif *rif, 161 enum mlxsw_sp_rif_counter_dir dir) 162 { 163 switch (dir) { 164 case MLXSW_SP_RIF_COUNTER_EGRESS: 165 return rif->counter_egress_valid; 166 case MLXSW_SP_RIF_COUNTER_INGRESS: 167 return rif->counter_ingress_valid; 168 } 169 return false; 170 } 171 172 static void 173 mlxsw_sp_rif_counter_valid_set(struct mlxsw_sp_rif *rif, 174 enum mlxsw_sp_rif_counter_dir dir, 175 bool valid) 176 { 177 switch (dir) { 178 case MLXSW_SP_RIF_COUNTER_EGRESS: 179 rif->counter_egress_valid = valid; 180 break; 181 case MLXSW_SP_RIF_COUNTER_INGRESS: 182 rif->counter_ingress_valid = valid; 183 break; 184 } 185 } 186 187 static int mlxsw_sp_rif_counter_edit(struct mlxsw_sp *mlxsw_sp, u16 rif_index, 188 unsigned int counter_index, bool enable, 189 enum mlxsw_sp_rif_counter_dir dir) 190 { 191 char ritr_pl[MLXSW_REG_RITR_LEN]; 192 bool is_egress = false; 193 int err; 194 195 if (dir == MLXSW_SP_RIF_COUNTER_EGRESS) 196 is_egress = true; 197 mlxsw_reg_ritr_rif_pack(ritr_pl, rif_index); 198 err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 199 if (err) 200 return err; 201 202 mlxsw_reg_ritr_counter_pack(ritr_pl, counter_index, enable, 203 is_egress); 204 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 205 } 206 207 int mlxsw_sp_rif_counter_value_get(struct mlxsw_sp *mlxsw_sp, 208 struct mlxsw_sp_rif *rif, 209 enum mlxsw_sp_rif_counter_dir dir, u64 *cnt) 210 { 211 char ricnt_pl[MLXSW_REG_RICNT_LEN]; 212 unsigned int *p_counter_index; 213 bool valid; 214 int err; 215 216 valid = mlxsw_sp_rif_counter_valid_get(rif, dir); 217 if (!valid) 218 return -EINVAL; 219 220 p_counter_index = mlxsw_sp_rif_p_counter_get(rif, dir); 221 if (!p_counter_index) 222 return -EINVAL; 223 mlxsw_reg_ricnt_pack(ricnt_pl, *p_counter_index, 224 MLXSW_REG_RICNT_OPCODE_NOP); 225 err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ricnt), ricnt_pl); 226 if (err) 227 return err; 228 *cnt = mlxsw_reg_ricnt_good_unicast_packets_get(ricnt_pl); 229 return 0; 230 } 231 232 struct mlxsw_sp_rif_counter_set_basic { 233 u64 good_unicast_packets; 234 u64 good_multicast_packets; 235 u64 good_broadcast_packets; 236 u64 good_unicast_bytes; 237 u64 good_multicast_bytes; 238 u64 good_broadcast_bytes; 239 u64 error_packets; 240 u64 discard_packets; 241 u64 error_bytes; 242 u64 discard_bytes; 243 }; 244 245 static int 246 mlxsw_sp_rif_counter_fetch_clear(struct mlxsw_sp_rif *rif, 247 enum mlxsw_sp_rif_counter_dir dir, 248 struct mlxsw_sp_rif_counter_set_basic *set) 249 { 250 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 251 char ricnt_pl[MLXSW_REG_RICNT_LEN]; 252 unsigned int *p_counter_index; 253 int err; 254 255 if (!mlxsw_sp_rif_counter_valid_get(rif, dir)) 256 return -EINVAL; 257 258 p_counter_index = mlxsw_sp_rif_p_counter_get(rif, dir); 259 if (!p_counter_index) 260 return -EINVAL; 261 262 mlxsw_reg_ricnt_pack(ricnt_pl, *p_counter_index, 263 MLXSW_REG_RICNT_OPCODE_CLEAR); 264 err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ricnt), ricnt_pl); 265 if (err) 266 return err; 267 268 if (!set) 269 return 0; 270 271 #define MLXSW_SP_RIF_COUNTER_EXTRACT(NAME) \ 272 (set->NAME = mlxsw_reg_ricnt_ ## NAME ## _get(ricnt_pl)) 273 274 MLXSW_SP_RIF_COUNTER_EXTRACT(good_unicast_packets); 275 MLXSW_SP_RIF_COUNTER_EXTRACT(good_multicast_packets); 276 MLXSW_SP_RIF_COUNTER_EXTRACT(good_broadcast_packets); 277 MLXSW_SP_RIF_COUNTER_EXTRACT(good_unicast_bytes); 278 MLXSW_SP_RIF_COUNTER_EXTRACT(good_multicast_bytes); 279 MLXSW_SP_RIF_COUNTER_EXTRACT(good_broadcast_bytes); 280 MLXSW_SP_RIF_COUNTER_EXTRACT(error_packets); 281 MLXSW_SP_RIF_COUNTER_EXTRACT(discard_packets); 282 MLXSW_SP_RIF_COUNTER_EXTRACT(error_bytes); 283 MLXSW_SP_RIF_COUNTER_EXTRACT(discard_bytes); 284 285 #undef MLXSW_SP_RIF_COUNTER_EXTRACT 286 287 return 0; 288 } 289 290 static int mlxsw_sp_rif_counter_clear(struct mlxsw_sp *mlxsw_sp, 291 unsigned int counter_index) 292 { 293 char ricnt_pl[MLXSW_REG_RICNT_LEN]; 294 295 mlxsw_reg_ricnt_pack(ricnt_pl, counter_index, 296 MLXSW_REG_RICNT_OPCODE_CLEAR); 297 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ricnt), ricnt_pl); 298 } 299 300 int mlxsw_sp_rif_counter_alloc(struct mlxsw_sp_rif *rif, 301 enum mlxsw_sp_rif_counter_dir dir) 302 { 303 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 304 unsigned int *p_counter_index; 305 int err; 306 307 if (mlxsw_sp_rif_counter_valid_get(rif, dir)) 308 return 0; 309 310 p_counter_index = mlxsw_sp_rif_p_counter_get(rif, dir); 311 if (!p_counter_index) 312 return -EINVAL; 313 314 err = mlxsw_sp_counter_alloc(mlxsw_sp, MLXSW_SP_COUNTER_SUB_POOL_RIF, 315 p_counter_index); 316 if (err) 317 return err; 318 319 err = mlxsw_sp_rif_counter_clear(mlxsw_sp, *p_counter_index); 320 if (err) 321 goto err_counter_clear; 322 323 err = mlxsw_sp_rif_counter_edit(mlxsw_sp, rif->rif_index, 324 *p_counter_index, true, dir); 325 if (err) 326 goto err_counter_edit; 327 mlxsw_sp_rif_counter_valid_set(rif, dir, true); 328 return 0; 329 330 err_counter_edit: 331 err_counter_clear: 332 mlxsw_sp_counter_free(mlxsw_sp, MLXSW_SP_COUNTER_SUB_POOL_RIF, 333 *p_counter_index); 334 return err; 335 } 336 337 void mlxsw_sp_rif_counter_free(struct mlxsw_sp_rif *rif, 338 enum mlxsw_sp_rif_counter_dir dir) 339 { 340 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 341 unsigned int *p_counter_index; 342 343 if (!mlxsw_sp_rif_counter_valid_get(rif, dir)) 344 return; 345 346 p_counter_index = mlxsw_sp_rif_p_counter_get(rif, dir); 347 if (WARN_ON(!p_counter_index)) 348 return; 349 mlxsw_sp_rif_counter_edit(mlxsw_sp, rif->rif_index, 350 *p_counter_index, false, dir); 351 mlxsw_sp_counter_free(mlxsw_sp, MLXSW_SP_COUNTER_SUB_POOL_RIF, 352 *p_counter_index); 353 mlxsw_sp_rif_counter_valid_set(rif, dir, false); 354 } 355 356 static void mlxsw_sp_rif_counters_alloc(struct mlxsw_sp_rif *rif) 357 { 358 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 359 struct devlink *devlink; 360 361 devlink = priv_to_devlink(mlxsw_sp->core); 362 if (!devlink_dpipe_table_counter_enabled(devlink, 363 MLXSW_SP_DPIPE_TABLE_NAME_ERIF)) 364 return; 365 mlxsw_sp_rif_counter_alloc(rif, MLXSW_SP_RIF_COUNTER_EGRESS); 366 } 367 368 static void mlxsw_sp_rif_counters_free(struct mlxsw_sp_rif *rif) 369 { 370 mlxsw_sp_rif_counter_free(rif, MLXSW_SP_RIF_COUNTER_EGRESS); 371 } 372 373 #define MLXSW_SP_PREFIX_COUNT (sizeof(struct in6_addr) * BITS_PER_BYTE + 1) 374 375 struct mlxsw_sp_prefix_usage { 376 DECLARE_BITMAP(b, MLXSW_SP_PREFIX_COUNT); 377 }; 378 379 #define mlxsw_sp_prefix_usage_for_each(prefix, prefix_usage) \ 380 for_each_set_bit(prefix, (prefix_usage)->b, MLXSW_SP_PREFIX_COUNT) 381 382 static bool 383 mlxsw_sp_prefix_usage_eq(struct mlxsw_sp_prefix_usage *prefix_usage1, 384 struct mlxsw_sp_prefix_usage *prefix_usage2) 385 { 386 return !memcmp(prefix_usage1, prefix_usage2, sizeof(*prefix_usage1)); 387 } 388 389 static void 390 mlxsw_sp_prefix_usage_cpy(struct mlxsw_sp_prefix_usage *prefix_usage1, 391 struct mlxsw_sp_prefix_usage *prefix_usage2) 392 { 393 memcpy(prefix_usage1, prefix_usage2, sizeof(*prefix_usage1)); 394 } 395 396 static void 397 mlxsw_sp_prefix_usage_set(struct mlxsw_sp_prefix_usage *prefix_usage, 398 unsigned char prefix_len) 399 { 400 set_bit(prefix_len, prefix_usage->b); 401 } 402 403 static void 404 mlxsw_sp_prefix_usage_clear(struct mlxsw_sp_prefix_usage *prefix_usage, 405 unsigned char prefix_len) 406 { 407 clear_bit(prefix_len, prefix_usage->b); 408 } 409 410 struct mlxsw_sp_fib_key { 411 unsigned char addr[sizeof(struct in6_addr)]; 412 unsigned char prefix_len; 413 }; 414 415 enum mlxsw_sp_fib_entry_type { 416 MLXSW_SP_FIB_ENTRY_TYPE_REMOTE, 417 MLXSW_SP_FIB_ENTRY_TYPE_LOCAL, 418 MLXSW_SP_FIB_ENTRY_TYPE_TRAP, 419 MLXSW_SP_FIB_ENTRY_TYPE_BLACKHOLE, 420 MLXSW_SP_FIB_ENTRY_TYPE_UNREACHABLE, 421 422 /* This is a special case of local delivery, where a packet should be 423 * decapsulated on reception. Note that there is no corresponding ENCAP, 424 * because that's a type of next hop, not of FIB entry. (There can be 425 * several next hops in a REMOTE entry, and some of them may be 426 * encapsulating entries.) 427 */ 428 MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP, 429 MLXSW_SP_FIB_ENTRY_TYPE_NVE_DECAP, 430 }; 431 432 struct mlxsw_sp_nexthop_group_info; 433 struct mlxsw_sp_nexthop_group; 434 struct mlxsw_sp_fib_entry; 435 436 struct mlxsw_sp_fib_node { 437 struct mlxsw_sp_fib_entry *fib_entry; 438 struct list_head list; 439 struct rhash_head ht_node; 440 struct mlxsw_sp_fib *fib; 441 struct mlxsw_sp_fib_key key; 442 }; 443 444 struct mlxsw_sp_fib_entry_decap { 445 struct mlxsw_sp_ipip_entry *ipip_entry; 446 u32 tunnel_index; 447 }; 448 449 struct mlxsw_sp_fib_entry { 450 struct mlxsw_sp_fib_node *fib_node; 451 enum mlxsw_sp_fib_entry_type type; 452 struct list_head nexthop_group_node; 453 struct mlxsw_sp_nexthop_group *nh_group; 454 struct mlxsw_sp_fib_entry_decap decap; /* Valid for decap entries. */ 455 }; 456 457 struct mlxsw_sp_fib4_entry { 458 struct mlxsw_sp_fib_entry common; 459 struct fib_info *fi; 460 u32 tb_id; 461 dscp_t dscp; 462 u8 type; 463 }; 464 465 struct mlxsw_sp_fib6_entry { 466 struct mlxsw_sp_fib_entry common; 467 struct list_head rt6_list; 468 unsigned int nrt6; 469 }; 470 471 struct mlxsw_sp_rt6 { 472 struct list_head list; 473 struct fib6_info *rt; 474 }; 475 476 struct mlxsw_sp_lpm_tree { 477 u8 id; /* tree ID */ 478 unsigned int ref_count; 479 enum mlxsw_sp_l3proto proto; 480 unsigned long prefix_ref_count[MLXSW_SP_PREFIX_COUNT]; 481 struct mlxsw_sp_prefix_usage prefix_usage; 482 }; 483 484 struct mlxsw_sp_fib { 485 struct rhashtable ht; 486 struct list_head node_list; 487 struct mlxsw_sp_vr *vr; 488 struct mlxsw_sp_lpm_tree *lpm_tree; 489 enum mlxsw_sp_l3proto proto; 490 }; 491 492 struct mlxsw_sp_vr { 493 u16 id; /* virtual router ID */ 494 u32 tb_id; /* kernel fib table id */ 495 unsigned int rif_count; 496 struct mlxsw_sp_fib *fib4; 497 struct mlxsw_sp_fib *fib6; 498 struct mlxsw_sp_mr_table *mr_table[MLXSW_SP_L3_PROTO_MAX]; 499 struct mlxsw_sp_rif *ul_rif; 500 refcount_t ul_rif_refcnt; 501 }; 502 503 static const struct rhashtable_params mlxsw_sp_fib_ht_params; 504 505 static struct mlxsw_sp_fib *mlxsw_sp_fib_create(struct mlxsw_sp *mlxsw_sp, 506 struct mlxsw_sp_vr *vr, 507 enum mlxsw_sp_l3proto proto) 508 { 509 struct mlxsw_sp_lpm_tree *lpm_tree; 510 struct mlxsw_sp_fib *fib; 511 int err; 512 513 lpm_tree = mlxsw_sp->router->lpm.proto_trees[proto]; 514 fib = kzalloc(sizeof(*fib), GFP_KERNEL); 515 if (!fib) 516 return ERR_PTR(-ENOMEM); 517 err = rhashtable_init(&fib->ht, &mlxsw_sp_fib_ht_params); 518 if (err) 519 goto err_rhashtable_init; 520 INIT_LIST_HEAD(&fib->node_list); 521 fib->proto = proto; 522 fib->vr = vr; 523 fib->lpm_tree = lpm_tree; 524 mlxsw_sp_lpm_tree_hold(lpm_tree); 525 err = mlxsw_sp_vr_lpm_tree_bind(mlxsw_sp, fib, lpm_tree->id); 526 if (err) 527 goto err_lpm_tree_bind; 528 return fib; 529 530 err_lpm_tree_bind: 531 mlxsw_sp_lpm_tree_put(mlxsw_sp, lpm_tree); 532 err_rhashtable_init: 533 kfree(fib); 534 return ERR_PTR(err); 535 } 536 537 static void mlxsw_sp_fib_destroy(struct mlxsw_sp *mlxsw_sp, 538 struct mlxsw_sp_fib *fib) 539 { 540 mlxsw_sp_vr_lpm_tree_unbind(mlxsw_sp, fib); 541 mlxsw_sp_lpm_tree_put(mlxsw_sp, fib->lpm_tree); 542 WARN_ON(!list_empty(&fib->node_list)); 543 rhashtable_destroy(&fib->ht); 544 kfree(fib); 545 } 546 547 static struct mlxsw_sp_lpm_tree * 548 mlxsw_sp_lpm_tree_find_unused(struct mlxsw_sp *mlxsw_sp) 549 { 550 static struct mlxsw_sp_lpm_tree *lpm_tree; 551 int i; 552 553 for (i = 0; i < mlxsw_sp->router->lpm.tree_count; i++) { 554 lpm_tree = &mlxsw_sp->router->lpm.trees[i]; 555 if (lpm_tree->ref_count == 0) 556 return lpm_tree; 557 } 558 return NULL; 559 } 560 561 static int mlxsw_sp_lpm_tree_alloc(struct mlxsw_sp *mlxsw_sp, 562 struct mlxsw_sp_lpm_tree *lpm_tree) 563 { 564 char ralta_pl[MLXSW_REG_RALTA_LEN]; 565 566 mlxsw_reg_ralta_pack(ralta_pl, true, 567 (enum mlxsw_reg_ralxx_protocol) lpm_tree->proto, 568 lpm_tree->id); 569 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralta), ralta_pl); 570 } 571 572 static void mlxsw_sp_lpm_tree_free(struct mlxsw_sp *mlxsw_sp, 573 struct mlxsw_sp_lpm_tree *lpm_tree) 574 { 575 char ralta_pl[MLXSW_REG_RALTA_LEN]; 576 577 mlxsw_reg_ralta_pack(ralta_pl, false, 578 (enum mlxsw_reg_ralxx_protocol) lpm_tree->proto, 579 lpm_tree->id); 580 mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralta), ralta_pl); 581 } 582 583 static int 584 mlxsw_sp_lpm_tree_left_struct_set(struct mlxsw_sp *mlxsw_sp, 585 struct mlxsw_sp_prefix_usage *prefix_usage, 586 struct mlxsw_sp_lpm_tree *lpm_tree) 587 { 588 char ralst_pl[MLXSW_REG_RALST_LEN]; 589 u8 root_bin = 0; 590 u8 prefix; 591 u8 last_prefix = MLXSW_REG_RALST_BIN_NO_CHILD; 592 593 mlxsw_sp_prefix_usage_for_each(prefix, prefix_usage) 594 root_bin = prefix; 595 596 mlxsw_reg_ralst_pack(ralst_pl, root_bin, lpm_tree->id); 597 mlxsw_sp_prefix_usage_for_each(prefix, prefix_usage) { 598 if (prefix == 0) 599 continue; 600 mlxsw_reg_ralst_bin_pack(ralst_pl, prefix, last_prefix, 601 MLXSW_REG_RALST_BIN_NO_CHILD); 602 last_prefix = prefix; 603 } 604 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralst), ralst_pl); 605 } 606 607 static struct mlxsw_sp_lpm_tree * 608 mlxsw_sp_lpm_tree_create(struct mlxsw_sp *mlxsw_sp, 609 struct mlxsw_sp_prefix_usage *prefix_usage, 610 enum mlxsw_sp_l3proto proto) 611 { 612 struct mlxsw_sp_lpm_tree *lpm_tree; 613 int err; 614 615 lpm_tree = mlxsw_sp_lpm_tree_find_unused(mlxsw_sp); 616 if (!lpm_tree) 617 return ERR_PTR(-EBUSY); 618 lpm_tree->proto = proto; 619 err = mlxsw_sp_lpm_tree_alloc(mlxsw_sp, lpm_tree); 620 if (err) 621 return ERR_PTR(err); 622 623 err = mlxsw_sp_lpm_tree_left_struct_set(mlxsw_sp, prefix_usage, 624 lpm_tree); 625 if (err) 626 goto err_left_struct_set; 627 memcpy(&lpm_tree->prefix_usage, prefix_usage, 628 sizeof(lpm_tree->prefix_usage)); 629 memset(&lpm_tree->prefix_ref_count, 0, 630 sizeof(lpm_tree->prefix_ref_count)); 631 lpm_tree->ref_count = 1; 632 return lpm_tree; 633 634 err_left_struct_set: 635 mlxsw_sp_lpm_tree_free(mlxsw_sp, lpm_tree); 636 return ERR_PTR(err); 637 } 638 639 static void mlxsw_sp_lpm_tree_destroy(struct mlxsw_sp *mlxsw_sp, 640 struct mlxsw_sp_lpm_tree *lpm_tree) 641 { 642 mlxsw_sp_lpm_tree_free(mlxsw_sp, lpm_tree); 643 } 644 645 static struct mlxsw_sp_lpm_tree * 646 mlxsw_sp_lpm_tree_get(struct mlxsw_sp *mlxsw_sp, 647 struct mlxsw_sp_prefix_usage *prefix_usage, 648 enum mlxsw_sp_l3proto proto) 649 { 650 struct mlxsw_sp_lpm_tree *lpm_tree; 651 int i; 652 653 for (i = 0; i < mlxsw_sp->router->lpm.tree_count; i++) { 654 lpm_tree = &mlxsw_sp->router->lpm.trees[i]; 655 if (lpm_tree->ref_count != 0 && 656 lpm_tree->proto == proto && 657 mlxsw_sp_prefix_usage_eq(&lpm_tree->prefix_usage, 658 prefix_usage)) { 659 mlxsw_sp_lpm_tree_hold(lpm_tree); 660 return lpm_tree; 661 } 662 } 663 return mlxsw_sp_lpm_tree_create(mlxsw_sp, prefix_usage, proto); 664 } 665 666 static void mlxsw_sp_lpm_tree_hold(struct mlxsw_sp_lpm_tree *lpm_tree) 667 { 668 lpm_tree->ref_count++; 669 } 670 671 static void mlxsw_sp_lpm_tree_put(struct mlxsw_sp *mlxsw_sp, 672 struct mlxsw_sp_lpm_tree *lpm_tree) 673 { 674 if (--lpm_tree->ref_count == 0) 675 mlxsw_sp_lpm_tree_destroy(mlxsw_sp, lpm_tree); 676 } 677 678 #define MLXSW_SP_LPM_TREE_MIN 1 /* tree 0 is reserved */ 679 680 static int mlxsw_sp_lpm_init(struct mlxsw_sp *mlxsw_sp) 681 { 682 struct mlxsw_sp_prefix_usage req_prefix_usage = {{ 0 } }; 683 struct mlxsw_sp_lpm_tree *lpm_tree; 684 u64 max_trees; 685 int err, i; 686 687 if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, MAX_LPM_TREES)) 688 return -EIO; 689 690 max_trees = MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_LPM_TREES); 691 mlxsw_sp->router->lpm.tree_count = max_trees - MLXSW_SP_LPM_TREE_MIN; 692 mlxsw_sp->router->lpm.trees = kcalloc(mlxsw_sp->router->lpm.tree_count, 693 sizeof(struct mlxsw_sp_lpm_tree), 694 GFP_KERNEL); 695 if (!mlxsw_sp->router->lpm.trees) 696 return -ENOMEM; 697 698 for (i = 0; i < mlxsw_sp->router->lpm.tree_count; i++) { 699 lpm_tree = &mlxsw_sp->router->lpm.trees[i]; 700 lpm_tree->id = i + MLXSW_SP_LPM_TREE_MIN; 701 } 702 703 lpm_tree = mlxsw_sp_lpm_tree_get(mlxsw_sp, &req_prefix_usage, 704 MLXSW_SP_L3_PROTO_IPV4); 705 if (IS_ERR(lpm_tree)) { 706 err = PTR_ERR(lpm_tree); 707 goto err_ipv4_tree_get; 708 } 709 mlxsw_sp->router->lpm.proto_trees[MLXSW_SP_L3_PROTO_IPV4] = lpm_tree; 710 711 lpm_tree = mlxsw_sp_lpm_tree_get(mlxsw_sp, &req_prefix_usage, 712 MLXSW_SP_L3_PROTO_IPV6); 713 if (IS_ERR(lpm_tree)) { 714 err = PTR_ERR(lpm_tree); 715 goto err_ipv6_tree_get; 716 } 717 mlxsw_sp->router->lpm.proto_trees[MLXSW_SP_L3_PROTO_IPV6] = lpm_tree; 718 719 return 0; 720 721 err_ipv6_tree_get: 722 lpm_tree = mlxsw_sp->router->lpm.proto_trees[MLXSW_SP_L3_PROTO_IPV4]; 723 mlxsw_sp_lpm_tree_put(mlxsw_sp, lpm_tree); 724 err_ipv4_tree_get: 725 kfree(mlxsw_sp->router->lpm.trees); 726 return err; 727 } 728 729 static void mlxsw_sp_lpm_fini(struct mlxsw_sp *mlxsw_sp) 730 { 731 struct mlxsw_sp_lpm_tree *lpm_tree; 732 733 lpm_tree = mlxsw_sp->router->lpm.proto_trees[MLXSW_SP_L3_PROTO_IPV6]; 734 mlxsw_sp_lpm_tree_put(mlxsw_sp, lpm_tree); 735 736 lpm_tree = mlxsw_sp->router->lpm.proto_trees[MLXSW_SP_L3_PROTO_IPV4]; 737 mlxsw_sp_lpm_tree_put(mlxsw_sp, lpm_tree); 738 739 kfree(mlxsw_sp->router->lpm.trees); 740 } 741 742 static bool mlxsw_sp_vr_is_used(const struct mlxsw_sp_vr *vr) 743 { 744 return !!vr->fib4 || !!vr->fib6 || 745 !!vr->mr_table[MLXSW_SP_L3_PROTO_IPV4] || 746 !!vr->mr_table[MLXSW_SP_L3_PROTO_IPV6]; 747 } 748 749 static struct mlxsw_sp_vr *mlxsw_sp_vr_find_unused(struct mlxsw_sp *mlxsw_sp) 750 { 751 struct mlxsw_sp_vr *vr; 752 int i; 753 754 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); i++) { 755 vr = &mlxsw_sp->router->vrs[i]; 756 if (!mlxsw_sp_vr_is_used(vr)) 757 return vr; 758 } 759 return NULL; 760 } 761 762 static int mlxsw_sp_vr_lpm_tree_bind(struct mlxsw_sp *mlxsw_sp, 763 const struct mlxsw_sp_fib *fib, u8 tree_id) 764 { 765 char raltb_pl[MLXSW_REG_RALTB_LEN]; 766 767 mlxsw_reg_raltb_pack(raltb_pl, fib->vr->id, 768 (enum mlxsw_reg_ralxx_protocol) fib->proto, 769 tree_id); 770 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(raltb), raltb_pl); 771 } 772 773 static int mlxsw_sp_vr_lpm_tree_unbind(struct mlxsw_sp *mlxsw_sp, 774 const struct mlxsw_sp_fib *fib) 775 { 776 char raltb_pl[MLXSW_REG_RALTB_LEN]; 777 778 /* Bind to tree 0 which is default */ 779 mlxsw_reg_raltb_pack(raltb_pl, fib->vr->id, 780 (enum mlxsw_reg_ralxx_protocol) fib->proto, 0); 781 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(raltb), raltb_pl); 782 } 783 784 static u32 mlxsw_sp_fix_tb_id(u32 tb_id) 785 { 786 /* For our purpose, squash main, default and local tables into one */ 787 if (tb_id == RT_TABLE_LOCAL || tb_id == RT_TABLE_DEFAULT) 788 tb_id = RT_TABLE_MAIN; 789 return tb_id; 790 } 791 792 static struct mlxsw_sp_vr *mlxsw_sp_vr_find(struct mlxsw_sp *mlxsw_sp, 793 u32 tb_id) 794 { 795 struct mlxsw_sp_vr *vr; 796 int i; 797 798 tb_id = mlxsw_sp_fix_tb_id(tb_id); 799 800 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); i++) { 801 vr = &mlxsw_sp->router->vrs[i]; 802 if (mlxsw_sp_vr_is_used(vr) && vr->tb_id == tb_id) 803 return vr; 804 } 805 return NULL; 806 } 807 808 int mlxsw_sp_router_tb_id_vr_id(struct mlxsw_sp *mlxsw_sp, u32 tb_id, 809 u16 *vr_id) 810 { 811 struct mlxsw_sp_vr *vr; 812 int err = 0; 813 814 mutex_lock(&mlxsw_sp->router->lock); 815 vr = mlxsw_sp_vr_find(mlxsw_sp, tb_id); 816 if (!vr) { 817 err = -ESRCH; 818 goto out; 819 } 820 *vr_id = vr->id; 821 out: 822 mutex_unlock(&mlxsw_sp->router->lock); 823 return err; 824 } 825 826 static struct mlxsw_sp_fib *mlxsw_sp_vr_fib(const struct mlxsw_sp_vr *vr, 827 enum mlxsw_sp_l3proto proto) 828 { 829 switch (proto) { 830 case MLXSW_SP_L3_PROTO_IPV4: 831 return vr->fib4; 832 case MLXSW_SP_L3_PROTO_IPV6: 833 return vr->fib6; 834 } 835 return NULL; 836 } 837 838 static struct mlxsw_sp_vr *mlxsw_sp_vr_create(struct mlxsw_sp *mlxsw_sp, 839 u32 tb_id, 840 struct netlink_ext_ack *extack) 841 { 842 struct mlxsw_sp_mr_table *mr4_table, *mr6_table; 843 struct mlxsw_sp_fib *fib4; 844 struct mlxsw_sp_fib *fib6; 845 struct mlxsw_sp_vr *vr; 846 int err; 847 848 vr = mlxsw_sp_vr_find_unused(mlxsw_sp); 849 if (!vr) { 850 NL_SET_ERR_MSG_MOD(extack, "Exceeded number of supported virtual routers"); 851 return ERR_PTR(-EBUSY); 852 } 853 fib4 = mlxsw_sp_fib_create(mlxsw_sp, vr, MLXSW_SP_L3_PROTO_IPV4); 854 if (IS_ERR(fib4)) 855 return ERR_CAST(fib4); 856 fib6 = mlxsw_sp_fib_create(mlxsw_sp, vr, MLXSW_SP_L3_PROTO_IPV6); 857 if (IS_ERR(fib6)) { 858 err = PTR_ERR(fib6); 859 goto err_fib6_create; 860 } 861 mr4_table = mlxsw_sp_mr_table_create(mlxsw_sp, vr->id, 862 MLXSW_SP_L3_PROTO_IPV4); 863 if (IS_ERR(mr4_table)) { 864 err = PTR_ERR(mr4_table); 865 goto err_mr4_table_create; 866 } 867 mr6_table = mlxsw_sp_mr_table_create(mlxsw_sp, vr->id, 868 MLXSW_SP_L3_PROTO_IPV6); 869 if (IS_ERR(mr6_table)) { 870 err = PTR_ERR(mr6_table); 871 goto err_mr6_table_create; 872 } 873 874 vr->fib4 = fib4; 875 vr->fib6 = fib6; 876 vr->mr_table[MLXSW_SP_L3_PROTO_IPV4] = mr4_table; 877 vr->mr_table[MLXSW_SP_L3_PROTO_IPV6] = mr6_table; 878 vr->tb_id = tb_id; 879 return vr; 880 881 err_mr6_table_create: 882 mlxsw_sp_mr_table_destroy(mr4_table); 883 err_mr4_table_create: 884 mlxsw_sp_fib_destroy(mlxsw_sp, fib6); 885 err_fib6_create: 886 mlxsw_sp_fib_destroy(mlxsw_sp, fib4); 887 return ERR_PTR(err); 888 } 889 890 static void mlxsw_sp_vr_destroy(struct mlxsw_sp *mlxsw_sp, 891 struct mlxsw_sp_vr *vr) 892 { 893 mlxsw_sp_mr_table_destroy(vr->mr_table[MLXSW_SP_L3_PROTO_IPV6]); 894 vr->mr_table[MLXSW_SP_L3_PROTO_IPV6] = NULL; 895 mlxsw_sp_mr_table_destroy(vr->mr_table[MLXSW_SP_L3_PROTO_IPV4]); 896 vr->mr_table[MLXSW_SP_L3_PROTO_IPV4] = NULL; 897 mlxsw_sp_fib_destroy(mlxsw_sp, vr->fib6); 898 vr->fib6 = NULL; 899 mlxsw_sp_fib_destroy(mlxsw_sp, vr->fib4); 900 vr->fib4 = NULL; 901 } 902 903 static struct mlxsw_sp_vr *mlxsw_sp_vr_get(struct mlxsw_sp *mlxsw_sp, u32 tb_id, 904 struct netlink_ext_ack *extack) 905 { 906 struct mlxsw_sp_vr *vr; 907 908 tb_id = mlxsw_sp_fix_tb_id(tb_id); 909 vr = mlxsw_sp_vr_find(mlxsw_sp, tb_id); 910 if (!vr) 911 vr = mlxsw_sp_vr_create(mlxsw_sp, tb_id, extack); 912 return vr; 913 } 914 915 static void mlxsw_sp_vr_put(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_vr *vr) 916 { 917 if (!vr->rif_count && list_empty(&vr->fib4->node_list) && 918 list_empty(&vr->fib6->node_list) && 919 mlxsw_sp_mr_table_empty(vr->mr_table[MLXSW_SP_L3_PROTO_IPV4]) && 920 mlxsw_sp_mr_table_empty(vr->mr_table[MLXSW_SP_L3_PROTO_IPV6])) 921 mlxsw_sp_vr_destroy(mlxsw_sp, vr); 922 } 923 924 static bool 925 mlxsw_sp_vr_lpm_tree_should_replace(struct mlxsw_sp_vr *vr, 926 enum mlxsw_sp_l3proto proto, u8 tree_id) 927 { 928 struct mlxsw_sp_fib *fib = mlxsw_sp_vr_fib(vr, proto); 929 930 if (!mlxsw_sp_vr_is_used(vr)) 931 return false; 932 if (fib->lpm_tree->id == tree_id) 933 return true; 934 return false; 935 } 936 937 static int mlxsw_sp_vr_lpm_tree_replace(struct mlxsw_sp *mlxsw_sp, 938 struct mlxsw_sp_fib *fib, 939 struct mlxsw_sp_lpm_tree *new_tree) 940 { 941 struct mlxsw_sp_lpm_tree *old_tree = fib->lpm_tree; 942 int err; 943 944 fib->lpm_tree = new_tree; 945 mlxsw_sp_lpm_tree_hold(new_tree); 946 err = mlxsw_sp_vr_lpm_tree_bind(mlxsw_sp, fib, new_tree->id); 947 if (err) 948 goto err_tree_bind; 949 mlxsw_sp_lpm_tree_put(mlxsw_sp, old_tree); 950 return 0; 951 952 err_tree_bind: 953 mlxsw_sp_lpm_tree_put(mlxsw_sp, new_tree); 954 fib->lpm_tree = old_tree; 955 return err; 956 } 957 958 static int mlxsw_sp_vrs_lpm_tree_replace(struct mlxsw_sp *mlxsw_sp, 959 struct mlxsw_sp_fib *fib, 960 struct mlxsw_sp_lpm_tree *new_tree) 961 { 962 enum mlxsw_sp_l3proto proto = fib->proto; 963 struct mlxsw_sp_lpm_tree *old_tree; 964 u8 old_id, new_id = new_tree->id; 965 struct mlxsw_sp_vr *vr; 966 int i, err; 967 968 old_tree = mlxsw_sp->router->lpm.proto_trees[proto]; 969 old_id = old_tree->id; 970 971 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); i++) { 972 vr = &mlxsw_sp->router->vrs[i]; 973 if (!mlxsw_sp_vr_lpm_tree_should_replace(vr, proto, old_id)) 974 continue; 975 err = mlxsw_sp_vr_lpm_tree_replace(mlxsw_sp, 976 mlxsw_sp_vr_fib(vr, proto), 977 new_tree); 978 if (err) 979 goto err_tree_replace; 980 } 981 982 memcpy(new_tree->prefix_ref_count, old_tree->prefix_ref_count, 983 sizeof(new_tree->prefix_ref_count)); 984 mlxsw_sp->router->lpm.proto_trees[proto] = new_tree; 985 mlxsw_sp_lpm_tree_put(mlxsw_sp, old_tree); 986 987 return 0; 988 989 err_tree_replace: 990 for (i--; i >= 0; i--) { 991 if (!mlxsw_sp_vr_lpm_tree_should_replace(vr, proto, new_id)) 992 continue; 993 mlxsw_sp_vr_lpm_tree_replace(mlxsw_sp, 994 mlxsw_sp_vr_fib(vr, proto), 995 old_tree); 996 } 997 return err; 998 } 999 1000 static int mlxsw_sp_vrs_init(struct mlxsw_sp *mlxsw_sp) 1001 { 1002 struct mlxsw_sp_vr *vr; 1003 u64 max_vrs; 1004 int i; 1005 1006 if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, MAX_VRS)) 1007 return -EIO; 1008 1009 max_vrs = MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); 1010 mlxsw_sp->router->vrs = kcalloc(max_vrs, sizeof(struct mlxsw_sp_vr), 1011 GFP_KERNEL); 1012 if (!mlxsw_sp->router->vrs) 1013 return -ENOMEM; 1014 1015 for (i = 0; i < max_vrs; i++) { 1016 vr = &mlxsw_sp->router->vrs[i]; 1017 vr->id = i; 1018 } 1019 1020 return 0; 1021 } 1022 1023 static void mlxsw_sp_router_fib_flush(struct mlxsw_sp *mlxsw_sp); 1024 1025 static void mlxsw_sp_vrs_fini(struct mlxsw_sp *mlxsw_sp) 1026 { 1027 /* At this stage we're guaranteed not to have new incoming 1028 * FIB notifications and the work queue is free from FIBs 1029 * sitting on top of mlxsw netdevs. However, we can still 1030 * have other FIBs queued. Flush the queue before flushing 1031 * the device's tables. No need for locks, as we're the only 1032 * writer. 1033 */ 1034 mlxsw_core_flush_owq(); 1035 mlxsw_sp_router_fib_flush(mlxsw_sp); 1036 kfree(mlxsw_sp->router->vrs); 1037 } 1038 1039 u32 mlxsw_sp_ipip_dev_ul_tb_id(const struct net_device *ol_dev) 1040 { 1041 struct net_device *d; 1042 u32 tb_id; 1043 1044 rcu_read_lock(); 1045 d = mlxsw_sp_ipip_netdev_ul_dev_get(ol_dev); 1046 if (d) 1047 tb_id = l3mdev_fib_table(d) ? : RT_TABLE_MAIN; 1048 else 1049 tb_id = RT_TABLE_MAIN; 1050 rcu_read_unlock(); 1051 1052 return tb_id; 1053 } 1054 1055 static struct mlxsw_sp_rif * 1056 mlxsw_sp_rif_create(struct mlxsw_sp *mlxsw_sp, 1057 const struct mlxsw_sp_rif_params *params, 1058 struct netlink_ext_ack *extack); 1059 1060 static struct mlxsw_sp_rif_ipip_lb * 1061 mlxsw_sp_ipip_ol_ipip_lb_create(struct mlxsw_sp *mlxsw_sp, 1062 enum mlxsw_sp_ipip_type ipipt, 1063 struct net_device *ol_dev, 1064 struct netlink_ext_ack *extack) 1065 { 1066 struct mlxsw_sp_rif_params_ipip_lb lb_params; 1067 const struct mlxsw_sp_ipip_ops *ipip_ops; 1068 struct mlxsw_sp_rif *rif; 1069 1070 ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipipt]; 1071 lb_params = (struct mlxsw_sp_rif_params_ipip_lb) { 1072 .common.dev = ol_dev, 1073 .common.lag = false, 1074 .common.double_entry = ipip_ops->double_rif_entry, 1075 .lb_config = ipip_ops->ol_loopback_config(mlxsw_sp, ol_dev), 1076 }; 1077 1078 rif = mlxsw_sp_rif_create(mlxsw_sp, &lb_params.common, extack); 1079 if (IS_ERR(rif)) 1080 return ERR_CAST(rif); 1081 return container_of(rif, struct mlxsw_sp_rif_ipip_lb, common); 1082 } 1083 1084 static struct mlxsw_sp_ipip_entry * 1085 mlxsw_sp_ipip_entry_alloc(struct mlxsw_sp *mlxsw_sp, 1086 enum mlxsw_sp_ipip_type ipipt, 1087 struct net_device *ol_dev) 1088 { 1089 const struct mlxsw_sp_ipip_ops *ipip_ops; 1090 struct mlxsw_sp_ipip_entry *ipip_entry; 1091 struct mlxsw_sp_ipip_entry *ret = NULL; 1092 int err; 1093 1094 ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipipt]; 1095 ipip_entry = kzalloc(sizeof(*ipip_entry), GFP_KERNEL); 1096 if (!ipip_entry) 1097 return ERR_PTR(-ENOMEM); 1098 1099 ipip_entry->ol_lb = mlxsw_sp_ipip_ol_ipip_lb_create(mlxsw_sp, ipipt, 1100 ol_dev, NULL); 1101 if (IS_ERR(ipip_entry->ol_lb)) { 1102 ret = ERR_CAST(ipip_entry->ol_lb); 1103 goto err_ol_ipip_lb_create; 1104 } 1105 1106 ipip_entry->ipipt = ipipt; 1107 ipip_entry->ol_dev = ol_dev; 1108 ipip_entry->parms = ipip_ops->parms_init(ol_dev); 1109 1110 err = ipip_ops->rem_ip_addr_set(mlxsw_sp, ipip_entry); 1111 if (err) { 1112 ret = ERR_PTR(err); 1113 goto err_rem_ip_addr_set; 1114 } 1115 1116 return ipip_entry; 1117 1118 err_rem_ip_addr_set: 1119 mlxsw_sp_rif_destroy(&ipip_entry->ol_lb->common); 1120 err_ol_ipip_lb_create: 1121 kfree(ipip_entry); 1122 return ret; 1123 } 1124 1125 static void mlxsw_sp_ipip_entry_dealloc(struct mlxsw_sp *mlxsw_sp, 1126 struct mlxsw_sp_ipip_entry *ipip_entry) 1127 { 1128 const struct mlxsw_sp_ipip_ops *ipip_ops = 1129 mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt]; 1130 1131 ipip_ops->rem_ip_addr_unset(mlxsw_sp, ipip_entry); 1132 mlxsw_sp_rif_destroy(&ipip_entry->ol_lb->common); 1133 kfree(ipip_entry); 1134 } 1135 1136 static bool 1137 mlxsw_sp_ipip_entry_saddr_matches(struct mlxsw_sp *mlxsw_sp, 1138 const enum mlxsw_sp_l3proto ul_proto, 1139 union mlxsw_sp_l3addr saddr, 1140 u32 ul_tb_id, 1141 struct mlxsw_sp_ipip_entry *ipip_entry) 1142 { 1143 u32 tun_ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(ipip_entry->ol_dev); 1144 enum mlxsw_sp_ipip_type ipipt = ipip_entry->ipipt; 1145 union mlxsw_sp_l3addr tun_saddr; 1146 1147 if (mlxsw_sp->router->ipip_ops_arr[ipipt]->ul_proto != ul_proto) 1148 return false; 1149 1150 tun_saddr = mlxsw_sp_ipip_netdev_saddr(ul_proto, ipip_entry->ol_dev); 1151 return tun_ul_tb_id == ul_tb_id && 1152 mlxsw_sp_l3addr_eq(&tun_saddr, &saddr); 1153 } 1154 1155 static int mlxsw_sp_ipip_decap_parsing_depth_inc(struct mlxsw_sp *mlxsw_sp, 1156 enum mlxsw_sp_ipip_type ipipt) 1157 { 1158 const struct mlxsw_sp_ipip_ops *ipip_ops; 1159 1160 ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipipt]; 1161 1162 /* Not all tunnels require to increase the default pasing depth 1163 * (96 bytes). 1164 */ 1165 if (ipip_ops->inc_parsing_depth) 1166 return mlxsw_sp_parsing_depth_inc(mlxsw_sp); 1167 1168 return 0; 1169 } 1170 1171 static void mlxsw_sp_ipip_decap_parsing_depth_dec(struct mlxsw_sp *mlxsw_sp, 1172 enum mlxsw_sp_ipip_type ipipt) 1173 { 1174 const struct mlxsw_sp_ipip_ops *ipip_ops = 1175 mlxsw_sp->router->ipip_ops_arr[ipipt]; 1176 1177 if (ipip_ops->inc_parsing_depth) 1178 mlxsw_sp_parsing_depth_dec(mlxsw_sp); 1179 } 1180 1181 static int 1182 mlxsw_sp_fib_entry_decap_init(struct mlxsw_sp *mlxsw_sp, 1183 struct mlxsw_sp_fib_entry *fib_entry, 1184 struct mlxsw_sp_ipip_entry *ipip_entry) 1185 { 1186 u32 tunnel_index; 1187 int err; 1188 1189 err = mlxsw_sp_kvdl_alloc(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ, 1190 1, &tunnel_index); 1191 if (err) 1192 return err; 1193 1194 err = mlxsw_sp_ipip_decap_parsing_depth_inc(mlxsw_sp, 1195 ipip_entry->ipipt); 1196 if (err) 1197 goto err_parsing_depth_inc; 1198 1199 ipip_entry->decap_fib_entry = fib_entry; 1200 fib_entry->decap.ipip_entry = ipip_entry; 1201 fib_entry->decap.tunnel_index = tunnel_index; 1202 1203 return 0; 1204 1205 err_parsing_depth_inc: 1206 mlxsw_sp_kvdl_free(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ, 1, 1207 fib_entry->decap.tunnel_index); 1208 return err; 1209 } 1210 1211 static void mlxsw_sp_fib_entry_decap_fini(struct mlxsw_sp *mlxsw_sp, 1212 struct mlxsw_sp_fib_entry *fib_entry) 1213 { 1214 enum mlxsw_sp_ipip_type ipipt = fib_entry->decap.ipip_entry->ipipt; 1215 1216 /* Unlink this node from the IPIP entry that it's the decap entry of. */ 1217 fib_entry->decap.ipip_entry->decap_fib_entry = NULL; 1218 fib_entry->decap.ipip_entry = NULL; 1219 mlxsw_sp_ipip_decap_parsing_depth_dec(mlxsw_sp, ipipt); 1220 mlxsw_sp_kvdl_free(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ, 1221 1, fib_entry->decap.tunnel_index); 1222 } 1223 1224 static struct mlxsw_sp_fib_node * 1225 mlxsw_sp_fib_node_lookup(struct mlxsw_sp_fib *fib, const void *addr, 1226 size_t addr_len, unsigned char prefix_len); 1227 static int mlxsw_sp_fib_entry_update(struct mlxsw_sp *mlxsw_sp, 1228 struct mlxsw_sp_fib_entry *fib_entry); 1229 1230 static void 1231 mlxsw_sp_ipip_entry_demote_decap(struct mlxsw_sp *mlxsw_sp, 1232 struct mlxsw_sp_ipip_entry *ipip_entry) 1233 { 1234 struct mlxsw_sp_fib_entry *fib_entry = ipip_entry->decap_fib_entry; 1235 1236 mlxsw_sp_fib_entry_decap_fini(mlxsw_sp, fib_entry); 1237 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP; 1238 1239 mlxsw_sp_fib_entry_update(mlxsw_sp, fib_entry); 1240 } 1241 1242 static void 1243 mlxsw_sp_ipip_entry_promote_decap(struct mlxsw_sp *mlxsw_sp, 1244 struct mlxsw_sp_ipip_entry *ipip_entry, 1245 struct mlxsw_sp_fib_entry *decap_fib_entry) 1246 { 1247 if (mlxsw_sp_fib_entry_decap_init(mlxsw_sp, decap_fib_entry, 1248 ipip_entry)) 1249 return; 1250 decap_fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP; 1251 1252 if (mlxsw_sp_fib_entry_update(mlxsw_sp, decap_fib_entry)) 1253 mlxsw_sp_ipip_entry_demote_decap(mlxsw_sp, ipip_entry); 1254 } 1255 1256 static struct mlxsw_sp_fib_entry * 1257 mlxsw_sp_router_ip2me_fib_entry_find(struct mlxsw_sp *mlxsw_sp, u32 tb_id, 1258 enum mlxsw_sp_l3proto proto, 1259 const union mlxsw_sp_l3addr *addr, 1260 enum mlxsw_sp_fib_entry_type type) 1261 { 1262 struct mlxsw_sp_fib_node *fib_node; 1263 unsigned char addr_prefix_len; 1264 struct mlxsw_sp_fib *fib; 1265 struct mlxsw_sp_vr *vr; 1266 const void *addrp; 1267 size_t addr_len; 1268 u32 addr4; 1269 1270 vr = mlxsw_sp_vr_find(mlxsw_sp, tb_id); 1271 if (!vr) 1272 return NULL; 1273 fib = mlxsw_sp_vr_fib(vr, proto); 1274 1275 switch (proto) { 1276 case MLXSW_SP_L3_PROTO_IPV4: 1277 addr4 = be32_to_cpu(addr->addr4); 1278 addrp = &addr4; 1279 addr_len = 4; 1280 addr_prefix_len = 32; 1281 break; 1282 case MLXSW_SP_L3_PROTO_IPV6: 1283 addrp = &addr->addr6; 1284 addr_len = 16; 1285 addr_prefix_len = 128; 1286 break; 1287 default: 1288 WARN_ON(1); 1289 return NULL; 1290 } 1291 1292 fib_node = mlxsw_sp_fib_node_lookup(fib, addrp, addr_len, 1293 addr_prefix_len); 1294 if (!fib_node || fib_node->fib_entry->type != type) 1295 return NULL; 1296 1297 return fib_node->fib_entry; 1298 } 1299 1300 /* Given an IPIP entry, find the corresponding decap route. */ 1301 static struct mlxsw_sp_fib_entry * 1302 mlxsw_sp_ipip_entry_find_decap(struct mlxsw_sp *mlxsw_sp, 1303 struct mlxsw_sp_ipip_entry *ipip_entry) 1304 { 1305 static struct mlxsw_sp_fib_node *fib_node; 1306 const struct mlxsw_sp_ipip_ops *ipip_ops; 1307 unsigned char saddr_prefix_len; 1308 union mlxsw_sp_l3addr saddr; 1309 struct mlxsw_sp_fib *ul_fib; 1310 struct mlxsw_sp_vr *ul_vr; 1311 const void *saddrp; 1312 size_t saddr_len; 1313 u32 ul_tb_id; 1314 u32 saddr4; 1315 1316 ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt]; 1317 1318 ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(ipip_entry->ol_dev); 1319 ul_vr = mlxsw_sp_vr_find(mlxsw_sp, ul_tb_id); 1320 if (!ul_vr) 1321 return NULL; 1322 1323 ul_fib = mlxsw_sp_vr_fib(ul_vr, ipip_ops->ul_proto); 1324 saddr = mlxsw_sp_ipip_netdev_saddr(ipip_ops->ul_proto, 1325 ipip_entry->ol_dev); 1326 1327 switch (ipip_ops->ul_proto) { 1328 case MLXSW_SP_L3_PROTO_IPV4: 1329 saddr4 = be32_to_cpu(saddr.addr4); 1330 saddrp = &saddr4; 1331 saddr_len = 4; 1332 saddr_prefix_len = 32; 1333 break; 1334 case MLXSW_SP_L3_PROTO_IPV6: 1335 saddrp = &saddr.addr6; 1336 saddr_len = 16; 1337 saddr_prefix_len = 128; 1338 break; 1339 default: 1340 WARN_ON(1); 1341 return NULL; 1342 } 1343 1344 fib_node = mlxsw_sp_fib_node_lookup(ul_fib, saddrp, saddr_len, 1345 saddr_prefix_len); 1346 if (!fib_node || 1347 fib_node->fib_entry->type != MLXSW_SP_FIB_ENTRY_TYPE_TRAP) 1348 return NULL; 1349 1350 return fib_node->fib_entry; 1351 } 1352 1353 static struct mlxsw_sp_ipip_entry * 1354 mlxsw_sp_ipip_entry_create(struct mlxsw_sp *mlxsw_sp, 1355 enum mlxsw_sp_ipip_type ipipt, 1356 struct net_device *ol_dev) 1357 { 1358 struct mlxsw_sp_ipip_entry *ipip_entry; 1359 1360 ipip_entry = mlxsw_sp_ipip_entry_alloc(mlxsw_sp, ipipt, ol_dev); 1361 if (IS_ERR(ipip_entry)) 1362 return ipip_entry; 1363 1364 list_add_tail(&ipip_entry->ipip_list_node, 1365 &mlxsw_sp->router->ipip_list); 1366 1367 return ipip_entry; 1368 } 1369 1370 static void 1371 mlxsw_sp_ipip_entry_destroy(struct mlxsw_sp *mlxsw_sp, 1372 struct mlxsw_sp_ipip_entry *ipip_entry) 1373 { 1374 list_del(&ipip_entry->ipip_list_node); 1375 mlxsw_sp_ipip_entry_dealloc(mlxsw_sp, ipip_entry); 1376 } 1377 1378 static bool 1379 mlxsw_sp_ipip_entry_matches_decap(struct mlxsw_sp *mlxsw_sp, 1380 const struct net_device *ul_dev, 1381 enum mlxsw_sp_l3proto ul_proto, 1382 union mlxsw_sp_l3addr ul_dip, 1383 struct mlxsw_sp_ipip_entry *ipip_entry) 1384 { 1385 u32 ul_tb_id = l3mdev_fib_table(ul_dev) ? : RT_TABLE_MAIN; 1386 enum mlxsw_sp_ipip_type ipipt = ipip_entry->ipipt; 1387 1388 if (mlxsw_sp->router->ipip_ops_arr[ipipt]->ul_proto != ul_proto) 1389 return false; 1390 1391 return mlxsw_sp_ipip_entry_saddr_matches(mlxsw_sp, ul_proto, ul_dip, 1392 ul_tb_id, ipip_entry); 1393 } 1394 1395 /* Given decap parameters, find the corresponding IPIP entry. */ 1396 static struct mlxsw_sp_ipip_entry * 1397 mlxsw_sp_ipip_entry_find_by_decap(struct mlxsw_sp *mlxsw_sp, int ul_dev_ifindex, 1398 enum mlxsw_sp_l3proto ul_proto, 1399 union mlxsw_sp_l3addr ul_dip) 1400 { 1401 struct mlxsw_sp_ipip_entry *ipip_entry = NULL; 1402 struct net_device *ul_dev; 1403 1404 rcu_read_lock(); 1405 1406 ul_dev = dev_get_by_index_rcu(mlxsw_sp_net(mlxsw_sp), ul_dev_ifindex); 1407 if (!ul_dev) 1408 goto out_unlock; 1409 1410 list_for_each_entry(ipip_entry, &mlxsw_sp->router->ipip_list, 1411 ipip_list_node) 1412 if (mlxsw_sp_ipip_entry_matches_decap(mlxsw_sp, ul_dev, 1413 ul_proto, ul_dip, 1414 ipip_entry)) 1415 goto out_unlock; 1416 1417 rcu_read_unlock(); 1418 1419 return NULL; 1420 1421 out_unlock: 1422 rcu_read_unlock(); 1423 return ipip_entry; 1424 } 1425 1426 static bool mlxsw_sp_netdev_ipip_type(const struct mlxsw_sp *mlxsw_sp, 1427 const struct net_device *dev, 1428 enum mlxsw_sp_ipip_type *p_type) 1429 { 1430 struct mlxsw_sp_router *router = mlxsw_sp->router; 1431 const struct mlxsw_sp_ipip_ops *ipip_ops; 1432 enum mlxsw_sp_ipip_type ipipt; 1433 1434 for (ipipt = 0; ipipt < MLXSW_SP_IPIP_TYPE_MAX; ++ipipt) { 1435 ipip_ops = router->ipip_ops_arr[ipipt]; 1436 if (dev->type == ipip_ops->dev_type) { 1437 if (p_type) 1438 *p_type = ipipt; 1439 return true; 1440 } 1441 } 1442 return false; 1443 } 1444 1445 static bool mlxsw_sp_netdev_is_ipip_ol(const struct mlxsw_sp *mlxsw_sp, 1446 const struct net_device *dev) 1447 { 1448 return mlxsw_sp_netdev_ipip_type(mlxsw_sp, dev, NULL); 1449 } 1450 1451 static struct mlxsw_sp_ipip_entry * 1452 mlxsw_sp_ipip_entry_find_by_ol_dev(struct mlxsw_sp *mlxsw_sp, 1453 const struct net_device *ol_dev) 1454 { 1455 struct mlxsw_sp_ipip_entry *ipip_entry; 1456 1457 list_for_each_entry(ipip_entry, &mlxsw_sp->router->ipip_list, 1458 ipip_list_node) 1459 if (ipip_entry->ol_dev == ol_dev) 1460 return ipip_entry; 1461 1462 return NULL; 1463 } 1464 1465 static struct mlxsw_sp_ipip_entry * 1466 mlxsw_sp_ipip_entry_find_by_ul_dev(const struct mlxsw_sp *mlxsw_sp, 1467 const struct net_device *ul_dev, 1468 struct mlxsw_sp_ipip_entry *start) 1469 { 1470 struct mlxsw_sp_ipip_entry *ipip_entry; 1471 1472 ipip_entry = list_prepare_entry(start, &mlxsw_sp->router->ipip_list, 1473 ipip_list_node); 1474 list_for_each_entry_continue(ipip_entry, &mlxsw_sp->router->ipip_list, 1475 ipip_list_node) { 1476 struct net_device *ol_dev = ipip_entry->ol_dev; 1477 struct net_device *ipip_ul_dev; 1478 1479 rcu_read_lock(); 1480 ipip_ul_dev = mlxsw_sp_ipip_netdev_ul_dev_get(ol_dev); 1481 rcu_read_unlock(); 1482 1483 if (ipip_ul_dev == ul_dev) 1484 return ipip_entry; 1485 } 1486 1487 return NULL; 1488 } 1489 1490 static bool mlxsw_sp_netdev_is_ipip_ul(struct mlxsw_sp *mlxsw_sp, 1491 const struct net_device *dev) 1492 { 1493 return mlxsw_sp_ipip_entry_find_by_ul_dev(mlxsw_sp, dev, NULL); 1494 } 1495 1496 static bool mlxsw_sp_netdevice_ipip_can_offload(struct mlxsw_sp *mlxsw_sp, 1497 const struct net_device *ol_dev, 1498 enum mlxsw_sp_ipip_type ipipt) 1499 { 1500 const struct mlxsw_sp_ipip_ops *ops 1501 = mlxsw_sp->router->ipip_ops_arr[ipipt]; 1502 1503 return ops->can_offload(mlxsw_sp, ol_dev); 1504 } 1505 1506 static int mlxsw_sp_netdevice_ipip_ol_reg_event(struct mlxsw_sp *mlxsw_sp, 1507 struct net_device *ol_dev) 1508 { 1509 enum mlxsw_sp_ipip_type ipipt = MLXSW_SP_IPIP_TYPE_MAX; 1510 struct mlxsw_sp_ipip_entry *ipip_entry; 1511 enum mlxsw_sp_l3proto ul_proto; 1512 union mlxsw_sp_l3addr saddr; 1513 u32 ul_tb_id; 1514 1515 mlxsw_sp_netdev_ipip_type(mlxsw_sp, ol_dev, &ipipt); 1516 if (mlxsw_sp_netdevice_ipip_can_offload(mlxsw_sp, ol_dev, ipipt)) { 1517 ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(ol_dev); 1518 ul_proto = mlxsw_sp->router->ipip_ops_arr[ipipt]->ul_proto; 1519 saddr = mlxsw_sp_ipip_netdev_saddr(ul_proto, ol_dev); 1520 if (!mlxsw_sp_ipip_demote_tunnel_by_saddr(mlxsw_sp, ul_proto, 1521 saddr, ul_tb_id, 1522 NULL)) { 1523 ipip_entry = mlxsw_sp_ipip_entry_create(mlxsw_sp, ipipt, 1524 ol_dev); 1525 if (IS_ERR(ipip_entry)) 1526 return PTR_ERR(ipip_entry); 1527 } 1528 } 1529 1530 return 0; 1531 } 1532 1533 static void mlxsw_sp_netdevice_ipip_ol_unreg_event(struct mlxsw_sp *mlxsw_sp, 1534 struct net_device *ol_dev) 1535 { 1536 struct mlxsw_sp_ipip_entry *ipip_entry; 1537 1538 ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev); 1539 if (ipip_entry) 1540 mlxsw_sp_ipip_entry_destroy(mlxsw_sp, ipip_entry); 1541 } 1542 1543 static void 1544 mlxsw_sp_ipip_entry_ol_up_event(struct mlxsw_sp *mlxsw_sp, 1545 struct mlxsw_sp_ipip_entry *ipip_entry) 1546 { 1547 struct mlxsw_sp_fib_entry *decap_fib_entry; 1548 1549 decap_fib_entry = mlxsw_sp_ipip_entry_find_decap(mlxsw_sp, ipip_entry); 1550 if (decap_fib_entry) 1551 mlxsw_sp_ipip_entry_promote_decap(mlxsw_sp, ipip_entry, 1552 decap_fib_entry); 1553 } 1554 1555 static int 1556 mlxsw_sp_rif_ipip_lb_op(struct mlxsw_sp_rif_ipip_lb *lb_rif, u16 ul_vr_id, 1557 u16 ul_rif_id, bool enable) 1558 { 1559 struct mlxsw_sp_rif_ipip_lb_config lb_cf = lb_rif->lb_config; 1560 enum mlxsw_reg_ritr_loopback_ipip_options ipip_options; 1561 struct mlxsw_sp_rif *rif = &lb_rif->common; 1562 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 1563 char ritr_pl[MLXSW_REG_RITR_LEN]; 1564 struct in6_addr *saddr6; 1565 u32 saddr4; 1566 1567 ipip_options = MLXSW_REG_RITR_LOOPBACK_IPIP_OPTIONS_GRE_KEY_PRESET; 1568 switch (lb_cf.ul_protocol) { 1569 case MLXSW_SP_L3_PROTO_IPV4: 1570 saddr4 = be32_to_cpu(lb_cf.saddr.addr4); 1571 mlxsw_reg_ritr_pack(ritr_pl, enable, MLXSW_REG_RITR_LOOPBACK_IF, 1572 rif->rif_index, rif->vr_id, rif->dev->mtu); 1573 mlxsw_reg_ritr_loopback_ipip4_pack(ritr_pl, lb_cf.lb_ipipt, 1574 ipip_options, ul_vr_id, 1575 ul_rif_id, saddr4, 1576 lb_cf.okey); 1577 break; 1578 1579 case MLXSW_SP_L3_PROTO_IPV6: 1580 saddr6 = &lb_cf.saddr.addr6; 1581 mlxsw_reg_ritr_pack(ritr_pl, enable, MLXSW_REG_RITR_LOOPBACK_IF, 1582 rif->rif_index, rif->vr_id, rif->dev->mtu); 1583 mlxsw_reg_ritr_loopback_ipip6_pack(ritr_pl, lb_cf.lb_ipipt, 1584 ipip_options, ul_vr_id, 1585 ul_rif_id, saddr6, 1586 lb_cf.okey); 1587 break; 1588 } 1589 1590 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 1591 } 1592 1593 static int mlxsw_sp_netdevice_ipip_ol_update_mtu(struct mlxsw_sp *mlxsw_sp, 1594 struct net_device *ol_dev) 1595 { 1596 struct mlxsw_sp_ipip_entry *ipip_entry; 1597 struct mlxsw_sp_rif_ipip_lb *lb_rif; 1598 int err = 0; 1599 1600 ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev); 1601 if (ipip_entry) { 1602 lb_rif = ipip_entry->ol_lb; 1603 err = mlxsw_sp_rif_ipip_lb_op(lb_rif, lb_rif->ul_vr_id, 1604 lb_rif->ul_rif_id, true); 1605 if (err) 1606 goto out; 1607 lb_rif->common.mtu = ol_dev->mtu; 1608 } 1609 1610 out: 1611 return err; 1612 } 1613 1614 static void mlxsw_sp_netdevice_ipip_ol_up_event(struct mlxsw_sp *mlxsw_sp, 1615 struct net_device *ol_dev) 1616 { 1617 struct mlxsw_sp_ipip_entry *ipip_entry; 1618 1619 ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev); 1620 if (ipip_entry) 1621 mlxsw_sp_ipip_entry_ol_up_event(mlxsw_sp, ipip_entry); 1622 } 1623 1624 static void 1625 mlxsw_sp_ipip_entry_ol_down_event(struct mlxsw_sp *mlxsw_sp, 1626 struct mlxsw_sp_ipip_entry *ipip_entry) 1627 { 1628 if (ipip_entry->decap_fib_entry) 1629 mlxsw_sp_ipip_entry_demote_decap(mlxsw_sp, ipip_entry); 1630 } 1631 1632 static void mlxsw_sp_netdevice_ipip_ol_down_event(struct mlxsw_sp *mlxsw_sp, 1633 struct net_device *ol_dev) 1634 { 1635 struct mlxsw_sp_ipip_entry *ipip_entry; 1636 1637 ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev); 1638 if (ipip_entry) 1639 mlxsw_sp_ipip_entry_ol_down_event(mlxsw_sp, ipip_entry); 1640 } 1641 1642 static void mlxsw_sp_nexthop_rif_migrate(struct mlxsw_sp *mlxsw_sp, 1643 struct mlxsw_sp_rif *old_rif, 1644 struct mlxsw_sp_rif *new_rif); 1645 static int 1646 mlxsw_sp_ipip_entry_ol_lb_update(struct mlxsw_sp *mlxsw_sp, 1647 struct mlxsw_sp_ipip_entry *ipip_entry, 1648 bool keep_encap, 1649 struct netlink_ext_ack *extack) 1650 { 1651 struct mlxsw_sp_rif_ipip_lb *old_lb_rif = ipip_entry->ol_lb; 1652 struct mlxsw_sp_rif_ipip_lb *new_lb_rif; 1653 1654 new_lb_rif = mlxsw_sp_ipip_ol_ipip_lb_create(mlxsw_sp, 1655 ipip_entry->ipipt, 1656 ipip_entry->ol_dev, 1657 extack); 1658 if (IS_ERR(new_lb_rif)) 1659 return PTR_ERR(new_lb_rif); 1660 ipip_entry->ol_lb = new_lb_rif; 1661 1662 if (keep_encap) 1663 mlxsw_sp_nexthop_rif_migrate(mlxsw_sp, &old_lb_rif->common, 1664 &new_lb_rif->common); 1665 1666 mlxsw_sp_rif_destroy(&old_lb_rif->common); 1667 1668 return 0; 1669 } 1670 1671 static void mlxsw_sp_nexthop_rif_update(struct mlxsw_sp *mlxsw_sp, 1672 struct mlxsw_sp_rif *rif); 1673 1674 /** 1675 * __mlxsw_sp_ipip_entry_update_tunnel - Update offload related to IPIP entry. 1676 * @mlxsw_sp: mlxsw_sp. 1677 * @ipip_entry: IPIP entry. 1678 * @recreate_loopback: Recreates the associated loopback RIF. 1679 * @keep_encap: Updates next hops that use the tunnel netdevice. This is only 1680 * relevant when recreate_loopback is true. 1681 * @update_nexthops: Updates next hops, keeping the current loopback RIF. This 1682 * is only relevant when recreate_loopback is false. 1683 * @extack: extack. 1684 * 1685 * Return: Non-zero value on failure. 1686 */ 1687 int __mlxsw_sp_ipip_entry_update_tunnel(struct mlxsw_sp *mlxsw_sp, 1688 struct mlxsw_sp_ipip_entry *ipip_entry, 1689 bool recreate_loopback, 1690 bool keep_encap, 1691 bool update_nexthops, 1692 struct netlink_ext_ack *extack) 1693 { 1694 int err; 1695 1696 /* RIFs can't be edited, so to update loopback, we need to destroy and 1697 * recreate it. That creates a window of opportunity where RALUE and 1698 * RATR registers end up referencing a RIF that's already gone. RATRs 1699 * are handled in mlxsw_sp_ipip_entry_ol_lb_update(), and to take care 1700 * of RALUE, demote the decap route back. 1701 */ 1702 if (ipip_entry->decap_fib_entry) 1703 mlxsw_sp_ipip_entry_demote_decap(mlxsw_sp, ipip_entry); 1704 1705 if (recreate_loopback) { 1706 err = mlxsw_sp_ipip_entry_ol_lb_update(mlxsw_sp, ipip_entry, 1707 keep_encap, extack); 1708 if (err) 1709 return err; 1710 } else if (update_nexthops) { 1711 mlxsw_sp_nexthop_rif_update(mlxsw_sp, 1712 &ipip_entry->ol_lb->common); 1713 } 1714 1715 if (ipip_entry->ol_dev->flags & IFF_UP) 1716 mlxsw_sp_ipip_entry_ol_up_event(mlxsw_sp, ipip_entry); 1717 1718 return 0; 1719 } 1720 1721 static int mlxsw_sp_netdevice_ipip_ol_vrf_event(struct mlxsw_sp *mlxsw_sp, 1722 struct net_device *ol_dev, 1723 struct netlink_ext_ack *extack) 1724 { 1725 struct mlxsw_sp_ipip_entry *ipip_entry = 1726 mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev); 1727 1728 if (!ipip_entry) 1729 return 0; 1730 1731 return __mlxsw_sp_ipip_entry_update_tunnel(mlxsw_sp, ipip_entry, 1732 true, false, false, extack); 1733 } 1734 1735 static int 1736 mlxsw_sp_netdevice_ipip_ul_vrf_event(struct mlxsw_sp *mlxsw_sp, 1737 struct mlxsw_sp_ipip_entry *ipip_entry, 1738 struct net_device *ul_dev, 1739 bool *demote_this, 1740 struct netlink_ext_ack *extack) 1741 { 1742 u32 ul_tb_id = l3mdev_fib_table(ul_dev) ? : RT_TABLE_MAIN; 1743 enum mlxsw_sp_l3proto ul_proto; 1744 union mlxsw_sp_l3addr saddr; 1745 1746 /* Moving underlay to a different VRF might cause local address 1747 * conflict, and the conflicting tunnels need to be demoted. 1748 */ 1749 ul_proto = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt]->ul_proto; 1750 saddr = mlxsw_sp_ipip_netdev_saddr(ul_proto, ipip_entry->ol_dev); 1751 if (mlxsw_sp_ipip_demote_tunnel_by_saddr(mlxsw_sp, ul_proto, 1752 saddr, ul_tb_id, 1753 ipip_entry)) { 1754 *demote_this = true; 1755 return 0; 1756 } 1757 1758 return __mlxsw_sp_ipip_entry_update_tunnel(mlxsw_sp, ipip_entry, 1759 true, true, false, extack); 1760 } 1761 1762 static int 1763 mlxsw_sp_netdevice_ipip_ul_up_event(struct mlxsw_sp *mlxsw_sp, 1764 struct mlxsw_sp_ipip_entry *ipip_entry, 1765 struct net_device *ul_dev) 1766 { 1767 return __mlxsw_sp_ipip_entry_update_tunnel(mlxsw_sp, ipip_entry, 1768 false, false, true, NULL); 1769 } 1770 1771 static int 1772 mlxsw_sp_netdevice_ipip_ul_down_event(struct mlxsw_sp *mlxsw_sp, 1773 struct mlxsw_sp_ipip_entry *ipip_entry, 1774 struct net_device *ul_dev) 1775 { 1776 /* A down underlay device causes encapsulated packets to not be 1777 * forwarded, but decap still works. So refresh next hops without 1778 * touching anything else. 1779 */ 1780 return __mlxsw_sp_ipip_entry_update_tunnel(mlxsw_sp, ipip_entry, 1781 false, false, true, NULL); 1782 } 1783 1784 static int 1785 mlxsw_sp_netdevice_ipip_ol_change_event(struct mlxsw_sp *mlxsw_sp, 1786 struct net_device *ol_dev, 1787 struct netlink_ext_ack *extack) 1788 { 1789 const struct mlxsw_sp_ipip_ops *ipip_ops; 1790 struct mlxsw_sp_ipip_entry *ipip_entry; 1791 int err; 1792 1793 ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev); 1794 if (!ipip_entry) 1795 /* A change might make a tunnel eligible for offloading, but 1796 * that is currently not implemented. What falls to slow path 1797 * stays there. 1798 */ 1799 return 0; 1800 1801 /* A change might make a tunnel not eligible for offloading. */ 1802 if (!mlxsw_sp_netdevice_ipip_can_offload(mlxsw_sp, ol_dev, 1803 ipip_entry->ipipt)) { 1804 mlxsw_sp_ipip_entry_demote_tunnel(mlxsw_sp, ipip_entry); 1805 return 0; 1806 } 1807 1808 ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt]; 1809 err = ipip_ops->ol_netdev_change(mlxsw_sp, ipip_entry, extack); 1810 return err; 1811 } 1812 1813 void mlxsw_sp_ipip_entry_demote_tunnel(struct mlxsw_sp *mlxsw_sp, 1814 struct mlxsw_sp_ipip_entry *ipip_entry) 1815 { 1816 struct net_device *ol_dev = ipip_entry->ol_dev; 1817 1818 if (ol_dev->flags & IFF_UP) 1819 mlxsw_sp_ipip_entry_ol_down_event(mlxsw_sp, ipip_entry); 1820 mlxsw_sp_ipip_entry_destroy(mlxsw_sp, ipip_entry); 1821 } 1822 1823 /* The configuration where several tunnels have the same local address in the 1824 * same underlay table needs special treatment in the HW. That is currently not 1825 * implemented in the driver. This function finds and demotes the first tunnel 1826 * with a given source address, except the one passed in the argument 1827 * `except'. 1828 */ 1829 bool 1830 mlxsw_sp_ipip_demote_tunnel_by_saddr(struct mlxsw_sp *mlxsw_sp, 1831 enum mlxsw_sp_l3proto ul_proto, 1832 union mlxsw_sp_l3addr saddr, 1833 u32 ul_tb_id, 1834 const struct mlxsw_sp_ipip_entry *except) 1835 { 1836 struct mlxsw_sp_ipip_entry *ipip_entry, *tmp; 1837 1838 list_for_each_entry_safe(ipip_entry, tmp, &mlxsw_sp->router->ipip_list, 1839 ipip_list_node) { 1840 if (ipip_entry != except && 1841 mlxsw_sp_ipip_entry_saddr_matches(mlxsw_sp, ul_proto, saddr, 1842 ul_tb_id, ipip_entry)) { 1843 mlxsw_sp_ipip_entry_demote_tunnel(mlxsw_sp, ipip_entry); 1844 return true; 1845 } 1846 } 1847 1848 return false; 1849 } 1850 1851 static void mlxsw_sp_ipip_demote_tunnel_by_ul_netdev(struct mlxsw_sp *mlxsw_sp, 1852 struct net_device *ul_dev) 1853 { 1854 struct mlxsw_sp_ipip_entry *ipip_entry, *tmp; 1855 1856 list_for_each_entry_safe(ipip_entry, tmp, &mlxsw_sp->router->ipip_list, 1857 ipip_list_node) { 1858 struct net_device *ol_dev = ipip_entry->ol_dev; 1859 struct net_device *ipip_ul_dev; 1860 1861 rcu_read_lock(); 1862 ipip_ul_dev = mlxsw_sp_ipip_netdev_ul_dev_get(ol_dev); 1863 rcu_read_unlock(); 1864 if (ipip_ul_dev == ul_dev) 1865 mlxsw_sp_ipip_entry_demote_tunnel(mlxsw_sp, ipip_entry); 1866 } 1867 } 1868 1869 static int mlxsw_sp_netdevice_ipip_ol_event(struct mlxsw_sp *mlxsw_sp, 1870 struct net_device *ol_dev, 1871 unsigned long event, 1872 struct netdev_notifier_info *info) 1873 { 1874 struct netdev_notifier_changeupper_info *chup; 1875 struct netlink_ext_ack *extack; 1876 int err = 0; 1877 1878 switch (event) { 1879 case NETDEV_REGISTER: 1880 err = mlxsw_sp_netdevice_ipip_ol_reg_event(mlxsw_sp, ol_dev); 1881 break; 1882 case NETDEV_UNREGISTER: 1883 mlxsw_sp_netdevice_ipip_ol_unreg_event(mlxsw_sp, ol_dev); 1884 break; 1885 case NETDEV_UP: 1886 mlxsw_sp_netdevice_ipip_ol_up_event(mlxsw_sp, ol_dev); 1887 break; 1888 case NETDEV_DOWN: 1889 mlxsw_sp_netdevice_ipip_ol_down_event(mlxsw_sp, ol_dev); 1890 break; 1891 case NETDEV_CHANGEUPPER: 1892 chup = container_of(info, typeof(*chup), info); 1893 extack = info->extack; 1894 if (netif_is_l3_master(chup->upper_dev)) 1895 err = mlxsw_sp_netdevice_ipip_ol_vrf_event(mlxsw_sp, 1896 ol_dev, 1897 extack); 1898 break; 1899 case NETDEV_CHANGE: 1900 extack = info->extack; 1901 err = mlxsw_sp_netdevice_ipip_ol_change_event(mlxsw_sp, 1902 ol_dev, extack); 1903 break; 1904 case NETDEV_CHANGEMTU: 1905 err = mlxsw_sp_netdevice_ipip_ol_update_mtu(mlxsw_sp, ol_dev); 1906 break; 1907 } 1908 return err; 1909 } 1910 1911 static int 1912 __mlxsw_sp_netdevice_ipip_ul_event(struct mlxsw_sp *mlxsw_sp, 1913 struct mlxsw_sp_ipip_entry *ipip_entry, 1914 struct net_device *ul_dev, 1915 bool *demote_this, 1916 unsigned long event, 1917 struct netdev_notifier_info *info) 1918 { 1919 struct netdev_notifier_changeupper_info *chup; 1920 struct netlink_ext_ack *extack; 1921 1922 switch (event) { 1923 case NETDEV_CHANGEUPPER: 1924 chup = container_of(info, typeof(*chup), info); 1925 extack = info->extack; 1926 if (netif_is_l3_master(chup->upper_dev)) 1927 return mlxsw_sp_netdevice_ipip_ul_vrf_event(mlxsw_sp, 1928 ipip_entry, 1929 ul_dev, 1930 demote_this, 1931 extack); 1932 break; 1933 1934 case NETDEV_UP: 1935 return mlxsw_sp_netdevice_ipip_ul_up_event(mlxsw_sp, ipip_entry, 1936 ul_dev); 1937 case NETDEV_DOWN: 1938 return mlxsw_sp_netdevice_ipip_ul_down_event(mlxsw_sp, 1939 ipip_entry, 1940 ul_dev); 1941 } 1942 return 0; 1943 } 1944 1945 static int 1946 mlxsw_sp_netdevice_ipip_ul_event(struct mlxsw_sp *mlxsw_sp, 1947 struct net_device *ul_dev, 1948 unsigned long event, 1949 struct netdev_notifier_info *info) 1950 { 1951 struct mlxsw_sp_ipip_entry *ipip_entry = NULL; 1952 int err; 1953 1954 while ((ipip_entry = mlxsw_sp_ipip_entry_find_by_ul_dev(mlxsw_sp, 1955 ul_dev, 1956 ipip_entry))) { 1957 struct mlxsw_sp_ipip_entry *prev; 1958 bool demote_this = false; 1959 1960 err = __mlxsw_sp_netdevice_ipip_ul_event(mlxsw_sp, ipip_entry, 1961 ul_dev, &demote_this, 1962 event, info); 1963 if (err) { 1964 mlxsw_sp_ipip_demote_tunnel_by_ul_netdev(mlxsw_sp, 1965 ul_dev); 1966 return err; 1967 } 1968 1969 if (demote_this) { 1970 if (list_is_first(&ipip_entry->ipip_list_node, 1971 &mlxsw_sp->router->ipip_list)) 1972 prev = NULL; 1973 else 1974 /* This can't be cached from previous iteration, 1975 * because that entry could be gone now. 1976 */ 1977 prev = list_prev_entry(ipip_entry, 1978 ipip_list_node); 1979 mlxsw_sp_ipip_entry_demote_tunnel(mlxsw_sp, ipip_entry); 1980 ipip_entry = prev; 1981 } 1982 } 1983 1984 return 0; 1985 } 1986 1987 int mlxsw_sp_router_nve_promote_decap(struct mlxsw_sp *mlxsw_sp, u32 ul_tb_id, 1988 enum mlxsw_sp_l3proto ul_proto, 1989 const union mlxsw_sp_l3addr *ul_sip, 1990 u32 tunnel_index) 1991 { 1992 enum mlxsw_sp_fib_entry_type type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP; 1993 struct mlxsw_sp_router *router = mlxsw_sp->router; 1994 struct mlxsw_sp_fib_entry *fib_entry; 1995 int err = 0; 1996 1997 mutex_lock(&mlxsw_sp->router->lock); 1998 1999 if (WARN_ON_ONCE(router->nve_decap_config.valid)) { 2000 err = -EINVAL; 2001 goto out; 2002 } 2003 2004 router->nve_decap_config.ul_tb_id = ul_tb_id; 2005 router->nve_decap_config.tunnel_index = tunnel_index; 2006 router->nve_decap_config.ul_proto = ul_proto; 2007 router->nve_decap_config.ul_sip = *ul_sip; 2008 router->nve_decap_config.valid = true; 2009 2010 /* It is valid to create a tunnel with a local IP and only later 2011 * assign this IP address to a local interface 2012 */ 2013 fib_entry = mlxsw_sp_router_ip2me_fib_entry_find(mlxsw_sp, ul_tb_id, 2014 ul_proto, ul_sip, 2015 type); 2016 if (!fib_entry) 2017 goto out; 2018 2019 fib_entry->decap.tunnel_index = tunnel_index; 2020 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_NVE_DECAP; 2021 2022 err = mlxsw_sp_fib_entry_update(mlxsw_sp, fib_entry); 2023 if (err) 2024 goto err_fib_entry_update; 2025 2026 goto out; 2027 2028 err_fib_entry_update: 2029 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP; 2030 mlxsw_sp_fib_entry_update(mlxsw_sp, fib_entry); 2031 out: 2032 mutex_unlock(&mlxsw_sp->router->lock); 2033 return err; 2034 } 2035 2036 void mlxsw_sp_router_nve_demote_decap(struct mlxsw_sp *mlxsw_sp, u32 ul_tb_id, 2037 enum mlxsw_sp_l3proto ul_proto, 2038 const union mlxsw_sp_l3addr *ul_sip) 2039 { 2040 enum mlxsw_sp_fib_entry_type type = MLXSW_SP_FIB_ENTRY_TYPE_NVE_DECAP; 2041 struct mlxsw_sp_router *router = mlxsw_sp->router; 2042 struct mlxsw_sp_fib_entry *fib_entry; 2043 2044 mutex_lock(&mlxsw_sp->router->lock); 2045 2046 if (WARN_ON_ONCE(!router->nve_decap_config.valid)) 2047 goto out; 2048 2049 router->nve_decap_config.valid = false; 2050 2051 fib_entry = mlxsw_sp_router_ip2me_fib_entry_find(mlxsw_sp, ul_tb_id, 2052 ul_proto, ul_sip, 2053 type); 2054 if (!fib_entry) 2055 goto out; 2056 2057 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP; 2058 mlxsw_sp_fib_entry_update(mlxsw_sp, fib_entry); 2059 out: 2060 mutex_unlock(&mlxsw_sp->router->lock); 2061 } 2062 2063 static bool mlxsw_sp_router_nve_is_decap(struct mlxsw_sp *mlxsw_sp, 2064 u32 ul_tb_id, 2065 enum mlxsw_sp_l3proto ul_proto, 2066 const union mlxsw_sp_l3addr *ul_sip) 2067 { 2068 struct mlxsw_sp_router *router = mlxsw_sp->router; 2069 2070 return router->nve_decap_config.valid && 2071 router->nve_decap_config.ul_tb_id == ul_tb_id && 2072 router->nve_decap_config.ul_proto == ul_proto && 2073 !memcmp(&router->nve_decap_config.ul_sip, ul_sip, 2074 sizeof(*ul_sip)); 2075 } 2076 2077 struct mlxsw_sp_neigh_key { 2078 struct neighbour *n; 2079 }; 2080 2081 struct mlxsw_sp_neigh_entry { 2082 struct list_head rif_list_node; 2083 struct rhash_head ht_node; 2084 struct mlxsw_sp_neigh_key key; 2085 u16 rif; 2086 bool connected; 2087 unsigned char ha[ETH_ALEN]; 2088 struct list_head nexthop_list; /* list of nexthops using 2089 * this neigh entry 2090 */ 2091 struct list_head nexthop_neighs_list_node; 2092 unsigned int counter_index; 2093 bool counter_valid; 2094 }; 2095 2096 static const struct rhashtable_params mlxsw_sp_neigh_ht_params = { 2097 .key_offset = offsetof(struct mlxsw_sp_neigh_entry, key), 2098 .head_offset = offsetof(struct mlxsw_sp_neigh_entry, ht_node), 2099 .key_len = sizeof(struct mlxsw_sp_neigh_key), 2100 }; 2101 2102 struct mlxsw_sp_neigh_entry * 2103 mlxsw_sp_rif_neigh_next(struct mlxsw_sp_rif *rif, 2104 struct mlxsw_sp_neigh_entry *neigh_entry) 2105 { 2106 if (!neigh_entry) { 2107 if (list_empty(&rif->neigh_list)) 2108 return NULL; 2109 else 2110 return list_first_entry(&rif->neigh_list, 2111 typeof(*neigh_entry), 2112 rif_list_node); 2113 } 2114 if (list_is_last(&neigh_entry->rif_list_node, &rif->neigh_list)) 2115 return NULL; 2116 return list_next_entry(neigh_entry, rif_list_node); 2117 } 2118 2119 int mlxsw_sp_neigh_entry_type(struct mlxsw_sp_neigh_entry *neigh_entry) 2120 { 2121 return neigh_entry->key.n->tbl->family; 2122 } 2123 2124 unsigned char * 2125 mlxsw_sp_neigh_entry_ha(struct mlxsw_sp_neigh_entry *neigh_entry) 2126 { 2127 return neigh_entry->ha; 2128 } 2129 2130 u32 mlxsw_sp_neigh4_entry_dip(struct mlxsw_sp_neigh_entry *neigh_entry) 2131 { 2132 struct neighbour *n; 2133 2134 n = neigh_entry->key.n; 2135 return ntohl(*((__be32 *) n->primary_key)); 2136 } 2137 2138 struct in6_addr * 2139 mlxsw_sp_neigh6_entry_dip(struct mlxsw_sp_neigh_entry *neigh_entry) 2140 { 2141 struct neighbour *n; 2142 2143 n = neigh_entry->key.n; 2144 return (struct in6_addr *) &n->primary_key; 2145 } 2146 2147 int mlxsw_sp_neigh_counter_get(struct mlxsw_sp *mlxsw_sp, 2148 struct mlxsw_sp_neigh_entry *neigh_entry, 2149 u64 *p_counter) 2150 { 2151 if (!neigh_entry->counter_valid) 2152 return -EINVAL; 2153 2154 return mlxsw_sp_flow_counter_get(mlxsw_sp, neigh_entry->counter_index, 2155 p_counter, NULL); 2156 } 2157 2158 static struct mlxsw_sp_neigh_entry * 2159 mlxsw_sp_neigh_entry_alloc(struct mlxsw_sp *mlxsw_sp, struct neighbour *n, 2160 u16 rif) 2161 { 2162 struct mlxsw_sp_neigh_entry *neigh_entry; 2163 2164 neigh_entry = kzalloc(sizeof(*neigh_entry), GFP_KERNEL); 2165 if (!neigh_entry) 2166 return NULL; 2167 2168 neigh_entry->key.n = n; 2169 neigh_entry->rif = rif; 2170 INIT_LIST_HEAD(&neigh_entry->nexthop_list); 2171 2172 return neigh_entry; 2173 } 2174 2175 static void mlxsw_sp_neigh_entry_free(struct mlxsw_sp_neigh_entry *neigh_entry) 2176 { 2177 kfree(neigh_entry); 2178 } 2179 2180 static int 2181 mlxsw_sp_neigh_entry_insert(struct mlxsw_sp *mlxsw_sp, 2182 struct mlxsw_sp_neigh_entry *neigh_entry) 2183 { 2184 return rhashtable_insert_fast(&mlxsw_sp->router->neigh_ht, 2185 &neigh_entry->ht_node, 2186 mlxsw_sp_neigh_ht_params); 2187 } 2188 2189 static void 2190 mlxsw_sp_neigh_entry_remove(struct mlxsw_sp *mlxsw_sp, 2191 struct mlxsw_sp_neigh_entry *neigh_entry) 2192 { 2193 rhashtable_remove_fast(&mlxsw_sp->router->neigh_ht, 2194 &neigh_entry->ht_node, 2195 mlxsw_sp_neigh_ht_params); 2196 } 2197 2198 static bool 2199 mlxsw_sp_neigh_counter_should_alloc(struct mlxsw_sp *mlxsw_sp, 2200 struct mlxsw_sp_neigh_entry *neigh_entry) 2201 { 2202 struct devlink *devlink; 2203 const char *table_name; 2204 2205 switch (mlxsw_sp_neigh_entry_type(neigh_entry)) { 2206 case AF_INET: 2207 table_name = MLXSW_SP_DPIPE_TABLE_NAME_HOST4; 2208 break; 2209 case AF_INET6: 2210 table_name = MLXSW_SP_DPIPE_TABLE_NAME_HOST6; 2211 break; 2212 default: 2213 WARN_ON(1); 2214 return false; 2215 } 2216 2217 devlink = priv_to_devlink(mlxsw_sp->core); 2218 return devlink_dpipe_table_counter_enabled(devlink, table_name); 2219 } 2220 2221 static void 2222 mlxsw_sp_neigh_counter_alloc(struct mlxsw_sp *mlxsw_sp, 2223 struct mlxsw_sp_neigh_entry *neigh_entry) 2224 { 2225 if (!mlxsw_sp_neigh_counter_should_alloc(mlxsw_sp, neigh_entry)) 2226 return; 2227 2228 if (mlxsw_sp_flow_counter_alloc(mlxsw_sp, &neigh_entry->counter_index)) 2229 return; 2230 2231 neigh_entry->counter_valid = true; 2232 } 2233 2234 static void 2235 mlxsw_sp_neigh_counter_free(struct mlxsw_sp *mlxsw_sp, 2236 struct mlxsw_sp_neigh_entry *neigh_entry) 2237 { 2238 if (!neigh_entry->counter_valid) 2239 return; 2240 mlxsw_sp_flow_counter_free(mlxsw_sp, 2241 neigh_entry->counter_index); 2242 neigh_entry->counter_valid = false; 2243 } 2244 2245 static struct mlxsw_sp_neigh_entry * 2246 mlxsw_sp_neigh_entry_create(struct mlxsw_sp *mlxsw_sp, struct neighbour *n) 2247 { 2248 struct mlxsw_sp_neigh_entry *neigh_entry; 2249 struct mlxsw_sp_rif *rif; 2250 int err; 2251 2252 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, n->dev); 2253 if (!rif) 2254 return ERR_PTR(-EINVAL); 2255 2256 neigh_entry = mlxsw_sp_neigh_entry_alloc(mlxsw_sp, n, rif->rif_index); 2257 if (!neigh_entry) 2258 return ERR_PTR(-ENOMEM); 2259 2260 err = mlxsw_sp_neigh_entry_insert(mlxsw_sp, neigh_entry); 2261 if (err) 2262 goto err_neigh_entry_insert; 2263 2264 mlxsw_sp_neigh_counter_alloc(mlxsw_sp, neigh_entry); 2265 atomic_inc(&mlxsw_sp->router->neighs_update.neigh_count); 2266 list_add(&neigh_entry->rif_list_node, &rif->neigh_list); 2267 2268 return neigh_entry; 2269 2270 err_neigh_entry_insert: 2271 mlxsw_sp_neigh_entry_free(neigh_entry); 2272 return ERR_PTR(err); 2273 } 2274 2275 static void 2276 mlxsw_sp_neigh_entry_destroy(struct mlxsw_sp *mlxsw_sp, 2277 struct mlxsw_sp_neigh_entry *neigh_entry) 2278 { 2279 list_del(&neigh_entry->rif_list_node); 2280 atomic_dec(&mlxsw_sp->router->neighs_update.neigh_count); 2281 mlxsw_sp_neigh_counter_free(mlxsw_sp, neigh_entry); 2282 mlxsw_sp_neigh_entry_remove(mlxsw_sp, neigh_entry); 2283 mlxsw_sp_neigh_entry_free(neigh_entry); 2284 } 2285 2286 static struct mlxsw_sp_neigh_entry * 2287 mlxsw_sp_neigh_entry_lookup(struct mlxsw_sp *mlxsw_sp, struct neighbour *n) 2288 { 2289 struct mlxsw_sp_neigh_key key; 2290 2291 key.n = n; 2292 return rhashtable_lookup_fast(&mlxsw_sp->router->neigh_ht, 2293 &key, mlxsw_sp_neigh_ht_params); 2294 } 2295 2296 static void 2297 mlxsw_sp_router_neighs_update_interval_init(struct mlxsw_sp *mlxsw_sp) 2298 { 2299 unsigned long interval; 2300 2301 #if IS_ENABLED(CONFIG_IPV6) 2302 interval = min_t(unsigned long, 2303 NEIGH_VAR(&arp_tbl.parms, DELAY_PROBE_TIME), 2304 NEIGH_VAR(&nd_tbl.parms, DELAY_PROBE_TIME)); 2305 #else 2306 interval = NEIGH_VAR(&arp_tbl.parms, DELAY_PROBE_TIME); 2307 #endif 2308 mlxsw_sp->router->neighs_update.interval = jiffies_to_msecs(interval); 2309 } 2310 2311 static void mlxsw_sp_router_neigh_ent_ipv4_process(struct mlxsw_sp *mlxsw_sp, 2312 char *rauhtd_pl, 2313 int ent_index) 2314 { 2315 u64 max_rifs = MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS); 2316 struct net_device *dev; 2317 struct neighbour *n; 2318 __be32 dipn; 2319 u32 dip; 2320 u16 rif; 2321 2322 mlxsw_reg_rauhtd_ent_ipv4_unpack(rauhtd_pl, ent_index, &rif, &dip); 2323 2324 if (WARN_ON_ONCE(rif >= max_rifs)) 2325 return; 2326 if (!mlxsw_sp->router->rifs[rif]) { 2327 dev_err_ratelimited(mlxsw_sp->bus_info->dev, "Incorrect RIF in neighbour entry\n"); 2328 return; 2329 } 2330 2331 dipn = htonl(dip); 2332 dev = mlxsw_sp->router->rifs[rif]->dev; 2333 n = neigh_lookup(&arp_tbl, &dipn, dev); 2334 if (!n) 2335 return; 2336 2337 netdev_dbg(dev, "Updating neighbour with IP=%pI4h\n", &dip); 2338 neigh_event_send(n, NULL); 2339 neigh_release(n); 2340 } 2341 2342 #if IS_ENABLED(CONFIG_IPV6) 2343 static void mlxsw_sp_router_neigh_ent_ipv6_process(struct mlxsw_sp *mlxsw_sp, 2344 char *rauhtd_pl, 2345 int rec_index) 2346 { 2347 struct net_device *dev; 2348 struct neighbour *n; 2349 struct in6_addr dip; 2350 u16 rif; 2351 2352 mlxsw_reg_rauhtd_ent_ipv6_unpack(rauhtd_pl, rec_index, &rif, 2353 (char *) &dip); 2354 2355 if (!mlxsw_sp->router->rifs[rif]) { 2356 dev_err_ratelimited(mlxsw_sp->bus_info->dev, "Incorrect RIF in neighbour entry\n"); 2357 return; 2358 } 2359 2360 dev = mlxsw_sp->router->rifs[rif]->dev; 2361 n = neigh_lookup(&nd_tbl, &dip, dev); 2362 if (!n) 2363 return; 2364 2365 netdev_dbg(dev, "Updating neighbour with IP=%pI6c\n", &dip); 2366 neigh_event_send(n, NULL); 2367 neigh_release(n); 2368 } 2369 #else 2370 static void mlxsw_sp_router_neigh_ent_ipv6_process(struct mlxsw_sp *mlxsw_sp, 2371 char *rauhtd_pl, 2372 int rec_index) 2373 { 2374 } 2375 #endif 2376 2377 static void mlxsw_sp_router_neigh_rec_ipv4_process(struct mlxsw_sp *mlxsw_sp, 2378 char *rauhtd_pl, 2379 int rec_index) 2380 { 2381 u8 num_entries; 2382 int i; 2383 2384 num_entries = mlxsw_reg_rauhtd_ipv4_rec_num_entries_get(rauhtd_pl, 2385 rec_index); 2386 /* Hardware starts counting at 0, so add 1. */ 2387 num_entries++; 2388 2389 /* Each record consists of several neighbour entries. */ 2390 for (i = 0; i < num_entries; i++) { 2391 int ent_index; 2392 2393 ent_index = rec_index * MLXSW_REG_RAUHTD_IPV4_ENT_PER_REC + i; 2394 mlxsw_sp_router_neigh_ent_ipv4_process(mlxsw_sp, rauhtd_pl, 2395 ent_index); 2396 } 2397 2398 } 2399 2400 static void mlxsw_sp_router_neigh_rec_ipv6_process(struct mlxsw_sp *mlxsw_sp, 2401 char *rauhtd_pl, 2402 int rec_index) 2403 { 2404 /* One record contains one entry. */ 2405 mlxsw_sp_router_neigh_ent_ipv6_process(mlxsw_sp, rauhtd_pl, 2406 rec_index); 2407 } 2408 2409 static void mlxsw_sp_router_neigh_rec_process(struct mlxsw_sp *mlxsw_sp, 2410 char *rauhtd_pl, int rec_index) 2411 { 2412 switch (mlxsw_reg_rauhtd_rec_type_get(rauhtd_pl, rec_index)) { 2413 case MLXSW_REG_RAUHTD_TYPE_IPV4: 2414 mlxsw_sp_router_neigh_rec_ipv4_process(mlxsw_sp, rauhtd_pl, 2415 rec_index); 2416 break; 2417 case MLXSW_REG_RAUHTD_TYPE_IPV6: 2418 mlxsw_sp_router_neigh_rec_ipv6_process(mlxsw_sp, rauhtd_pl, 2419 rec_index); 2420 break; 2421 } 2422 } 2423 2424 static bool mlxsw_sp_router_rauhtd_is_full(char *rauhtd_pl) 2425 { 2426 u8 num_rec, last_rec_index, num_entries; 2427 2428 num_rec = mlxsw_reg_rauhtd_num_rec_get(rauhtd_pl); 2429 last_rec_index = num_rec - 1; 2430 2431 if (num_rec < MLXSW_REG_RAUHTD_REC_MAX_NUM) 2432 return false; 2433 if (mlxsw_reg_rauhtd_rec_type_get(rauhtd_pl, last_rec_index) == 2434 MLXSW_REG_RAUHTD_TYPE_IPV6) 2435 return true; 2436 2437 num_entries = mlxsw_reg_rauhtd_ipv4_rec_num_entries_get(rauhtd_pl, 2438 last_rec_index); 2439 if (++num_entries == MLXSW_REG_RAUHTD_IPV4_ENT_PER_REC) 2440 return true; 2441 return false; 2442 } 2443 2444 static int 2445 __mlxsw_sp_router_neighs_update_rauhtd(struct mlxsw_sp *mlxsw_sp, 2446 char *rauhtd_pl, 2447 enum mlxsw_reg_rauhtd_type type) 2448 { 2449 int i, num_rec; 2450 int err; 2451 2452 /* Ensure the RIF we read from the device does not change mid-dump. */ 2453 mutex_lock(&mlxsw_sp->router->lock); 2454 do { 2455 mlxsw_reg_rauhtd_pack(rauhtd_pl, type); 2456 err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(rauhtd), 2457 rauhtd_pl); 2458 if (err) { 2459 dev_err_ratelimited(mlxsw_sp->bus_info->dev, "Failed to dump neighbour table\n"); 2460 break; 2461 } 2462 num_rec = mlxsw_reg_rauhtd_num_rec_get(rauhtd_pl); 2463 for (i = 0; i < num_rec; i++) 2464 mlxsw_sp_router_neigh_rec_process(mlxsw_sp, rauhtd_pl, 2465 i); 2466 } while (mlxsw_sp_router_rauhtd_is_full(rauhtd_pl)); 2467 mutex_unlock(&mlxsw_sp->router->lock); 2468 2469 return err; 2470 } 2471 2472 static int mlxsw_sp_router_neighs_update_rauhtd(struct mlxsw_sp *mlxsw_sp) 2473 { 2474 enum mlxsw_reg_rauhtd_type type; 2475 char *rauhtd_pl; 2476 int err; 2477 2478 if (!atomic_read(&mlxsw_sp->router->neighs_update.neigh_count)) 2479 return 0; 2480 2481 rauhtd_pl = kmalloc(MLXSW_REG_RAUHTD_LEN, GFP_KERNEL); 2482 if (!rauhtd_pl) 2483 return -ENOMEM; 2484 2485 type = MLXSW_REG_RAUHTD_TYPE_IPV4; 2486 err = __mlxsw_sp_router_neighs_update_rauhtd(mlxsw_sp, rauhtd_pl, type); 2487 if (err) 2488 goto out; 2489 2490 type = MLXSW_REG_RAUHTD_TYPE_IPV6; 2491 err = __mlxsw_sp_router_neighs_update_rauhtd(mlxsw_sp, rauhtd_pl, type); 2492 out: 2493 kfree(rauhtd_pl); 2494 return err; 2495 } 2496 2497 static void mlxsw_sp_router_neighs_update_nh(struct mlxsw_sp *mlxsw_sp) 2498 { 2499 struct mlxsw_sp_neigh_entry *neigh_entry; 2500 2501 mutex_lock(&mlxsw_sp->router->lock); 2502 list_for_each_entry(neigh_entry, &mlxsw_sp->router->nexthop_neighs_list, 2503 nexthop_neighs_list_node) 2504 /* If this neigh have nexthops, make the kernel think this neigh 2505 * is active regardless of the traffic. 2506 */ 2507 neigh_event_send(neigh_entry->key.n, NULL); 2508 mutex_unlock(&mlxsw_sp->router->lock); 2509 } 2510 2511 static void 2512 mlxsw_sp_router_neighs_update_work_schedule(struct mlxsw_sp *mlxsw_sp) 2513 { 2514 unsigned long interval = mlxsw_sp->router->neighs_update.interval; 2515 2516 mlxsw_core_schedule_dw(&mlxsw_sp->router->neighs_update.dw, 2517 msecs_to_jiffies(interval)); 2518 } 2519 2520 static void mlxsw_sp_router_neighs_update_work(struct work_struct *work) 2521 { 2522 struct mlxsw_sp_router *router; 2523 int err; 2524 2525 router = container_of(work, struct mlxsw_sp_router, 2526 neighs_update.dw.work); 2527 err = mlxsw_sp_router_neighs_update_rauhtd(router->mlxsw_sp); 2528 if (err) 2529 dev_err(router->mlxsw_sp->bus_info->dev, "Could not update kernel for neigh activity"); 2530 2531 mlxsw_sp_router_neighs_update_nh(router->mlxsw_sp); 2532 2533 mlxsw_sp_router_neighs_update_work_schedule(router->mlxsw_sp); 2534 } 2535 2536 static void mlxsw_sp_router_probe_unresolved_nexthops(struct work_struct *work) 2537 { 2538 struct mlxsw_sp_neigh_entry *neigh_entry; 2539 struct mlxsw_sp_router *router; 2540 2541 router = container_of(work, struct mlxsw_sp_router, 2542 nexthop_probe_dw.work); 2543 /* Iterate over nexthop neighbours, find those who are unresolved and 2544 * send arp on them. This solves the chicken-egg problem when 2545 * the nexthop wouldn't get offloaded until the neighbor is resolved 2546 * but it wouldn't get resolved ever in case traffic is flowing in HW 2547 * using different nexthop. 2548 */ 2549 mutex_lock(&router->lock); 2550 list_for_each_entry(neigh_entry, &router->nexthop_neighs_list, 2551 nexthop_neighs_list_node) 2552 if (!neigh_entry->connected) 2553 neigh_event_send(neigh_entry->key.n, NULL); 2554 mutex_unlock(&router->lock); 2555 2556 mlxsw_core_schedule_dw(&router->nexthop_probe_dw, 2557 MLXSW_SP_UNRESOLVED_NH_PROBE_INTERVAL); 2558 } 2559 2560 static void 2561 mlxsw_sp_nexthop_neigh_update(struct mlxsw_sp *mlxsw_sp, 2562 struct mlxsw_sp_neigh_entry *neigh_entry, 2563 bool removing, bool dead); 2564 2565 static enum mlxsw_reg_rauht_op mlxsw_sp_rauht_op(bool adding) 2566 { 2567 return adding ? MLXSW_REG_RAUHT_OP_WRITE_ADD : 2568 MLXSW_REG_RAUHT_OP_WRITE_DELETE; 2569 } 2570 2571 static int 2572 mlxsw_sp_router_neigh_entry_op4(struct mlxsw_sp *mlxsw_sp, 2573 struct mlxsw_sp_neigh_entry *neigh_entry, 2574 enum mlxsw_reg_rauht_op op) 2575 { 2576 struct neighbour *n = neigh_entry->key.n; 2577 u32 dip = ntohl(*((__be32 *) n->primary_key)); 2578 char rauht_pl[MLXSW_REG_RAUHT_LEN]; 2579 2580 mlxsw_reg_rauht_pack4(rauht_pl, op, neigh_entry->rif, neigh_entry->ha, 2581 dip); 2582 if (neigh_entry->counter_valid) 2583 mlxsw_reg_rauht_pack_counter(rauht_pl, 2584 neigh_entry->counter_index); 2585 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rauht), rauht_pl); 2586 } 2587 2588 static int 2589 mlxsw_sp_router_neigh_entry_op6(struct mlxsw_sp *mlxsw_sp, 2590 struct mlxsw_sp_neigh_entry *neigh_entry, 2591 enum mlxsw_reg_rauht_op op) 2592 { 2593 struct neighbour *n = neigh_entry->key.n; 2594 char rauht_pl[MLXSW_REG_RAUHT_LEN]; 2595 const char *dip = n->primary_key; 2596 2597 mlxsw_reg_rauht_pack6(rauht_pl, op, neigh_entry->rif, neigh_entry->ha, 2598 dip); 2599 if (neigh_entry->counter_valid) 2600 mlxsw_reg_rauht_pack_counter(rauht_pl, 2601 neigh_entry->counter_index); 2602 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rauht), rauht_pl); 2603 } 2604 2605 bool mlxsw_sp_neigh_ipv6_ignore(struct mlxsw_sp_neigh_entry *neigh_entry) 2606 { 2607 struct neighbour *n = neigh_entry->key.n; 2608 2609 /* Packets with a link-local destination address are trapped 2610 * after LPM lookup and never reach the neighbour table, so 2611 * there is no need to program such neighbours to the device. 2612 */ 2613 if (ipv6_addr_type((struct in6_addr *) &n->primary_key) & 2614 IPV6_ADDR_LINKLOCAL) 2615 return true; 2616 return false; 2617 } 2618 2619 static void 2620 mlxsw_sp_neigh_entry_update(struct mlxsw_sp *mlxsw_sp, 2621 struct mlxsw_sp_neigh_entry *neigh_entry, 2622 bool adding) 2623 { 2624 enum mlxsw_reg_rauht_op op = mlxsw_sp_rauht_op(adding); 2625 int err; 2626 2627 if (!adding && !neigh_entry->connected) 2628 return; 2629 neigh_entry->connected = adding; 2630 if (neigh_entry->key.n->tbl->family == AF_INET) { 2631 err = mlxsw_sp_router_neigh_entry_op4(mlxsw_sp, neigh_entry, 2632 op); 2633 if (err) 2634 return; 2635 } else if (neigh_entry->key.n->tbl->family == AF_INET6) { 2636 if (mlxsw_sp_neigh_ipv6_ignore(neigh_entry)) 2637 return; 2638 err = mlxsw_sp_router_neigh_entry_op6(mlxsw_sp, neigh_entry, 2639 op); 2640 if (err) 2641 return; 2642 } else { 2643 WARN_ON_ONCE(1); 2644 return; 2645 } 2646 2647 if (adding) 2648 neigh_entry->key.n->flags |= NTF_OFFLOADED; 2649 else 2650 neigh_entry->key.n->flags &= ~NTF_OFFLOADED; 2651 } 2652 2653 void 2654 mlxsw_sp_neigh_entry_counter_update(struct mlxsw_sp *mlxsw_sp, 2655 struct mlxsw_sp_neigh_entry *neigh_entry, 2656 bool adding) 2657 { 2658 if (adding) 2659 mlxsw_sp_neigh_counter_alloc(mlxsw_sp, neigh_entry); 2660 else 2661 mlxsw_sp_neigh_counter_free(mlxsw_sp, neigh_entry); 2662 mlxsw_sp_neigh_entry_update(mlxsw_sp, neigh_entry, true); 2663 } 2664 2665 struct mlxsw_sp_netevent_work { 2666 struct work_struct work; 2667 struct mlxsw_sp *mlxsw_sp; 2668 struct neighbour *n; 2669 }; 2670 2671 static void mlxsw_sp_router_neigh_event_work(struct work_struct *work) 2672 { 2673 struct mlxsw_sp_netevent_work *net_work = 2674 container_of(work, struct mlxsw_sp_netevent_work, work); 2675 struct mlxsw_sp *mlxsw_sp = net_work->mlxsw_sp; 2676 struct mlxsw_sp_neigh_entry *neigh_entry; 2677 struct neighbour *n = net_work->n; 2678 unsigned char ha[ETH_ALEN]; 2679 bool entry_connected; 2680 u8 nud_state, dead; 2681 2682 /* If these parameters are changed after we release the lock, 2683 * then we are guaranteed to receive another event letting us 2684 * know about it. 2685 */ 2686 read_lock_bh(&n->lock); 2687 memcpy(ha, n->ha, ETH_ALEN); 2688 nud_state = n->nud_state; 2689 dead = n->dead; 2690 read_unlock_bh(&n->lock); 2691 2692 mutex_lock(&mlxsw_sp->router->lock); 2693 mlxsw_sp_span_respin(mlxsw_sp); 2694 2695 entry_connected = nud_state & NUD_VALID && !dead; 2696 neigh_entry = mlxsw_sp_neigh_entry_lookup(mlxsw_sp, n); 2697 if (!entry_connected && !neigh_entry) 2698 goto out; 2699 if (!neigh_entry) { 2700 neigh_entry = mlxsw_sp_neigh_entry_create(mlxsw_sp, n); 2701 if (IS_ERR(neigh_entry)) 2702 goto out; 2703 } 2704 2705 if (neigh_entry->connected && entry_connected && 2706 !memcmp(neigh_entry->ha, ha, ETH_ALEN)) 2707 goto out; 2708 2709 memcpy(neigh_entry->ha, ha, ETH_ALEN); 2710 mlxsw_sp_neigh_entry_update(mlxsw_sp, neigh_entry, entry_connected); 2711 mlxsw_sp_nexthop_neigh_update(mlxsw_sp, neigh_entry, !entry_connected, 2712 dead); 2713 2714 if (!neigh_entry->connected && list_empty(&neigh_entry->nexthop_list)) 2715 mlxsw_sp_neigh_entry_destroy(mlxsw_sp, neigh_entry); 2716 2717 out: 2718 mutex_unlock(&mlxsw_sp->router->lock); 2719 neigh_release(n); 2720 kfree(net_work); 2721 } 2722 2723 static int mlxsw_sp_mp_hash_init(struct mlxsw_sp *mlxsw_sp); 2724 2725 static void mlxsw_sp_router_mp_hash_event_work(struct work_struct *work) 2726 { 2727 struct mlxsw_sp_netevent_work *net_work = 2728 container_of(work, struct mlxsw_sp_netevent_work, work); 2729 struct mlxsw_sp *mlxsw_sp = net_work->mlxsw_sp; 2730 2731 mlxsw_sp_mp_hash_init(mlxsw_sp); 2732 kfree(net_work); 2733 } 2734 2735 static int __mlxsw_sp_router_init(struct mlxsw_sp *mlxsw_sp); 2736 2737 static void mlxsw_sp_router_update_priority_work(struct work_struct *work) 2738 { 2739 struct mlxsw_sp_netevent_work *net_work = 2740 container_of(work, struct mlxsw_sp_netevent_work, work); 2741 struct mlxsw_sp *mlxsw_sp = net_work->mlxsw_sp; 2742 2743 __mlxsw_sp_router_init(mlxsw_sp); 2744 kfree(net_work); 2745 } 2746 2747 static int mlxsw_sp_router_schedule_work(struct net *net, 2748 struct notifier_block *nb, 2749 void (*cb)(struct work_struct *)) 2750 { 2751 struct mlxsw_sp_netevent_work *net_work; 2752 struct mlxsw_sp_router *router; 2753 2754 router = container_of(nb, struct mlxsw_sp_router, netevent_nb); 2755 if (!net_eq(net, mlxsw_sp_net(router->mlxsw_sp))) 2756 return NOTIFY_DONE; 2757 2758 net_work = kzalloc(sizeof(*net_work), GFP_ATOMIC); 2759 if (!net_work) 2760 return NOTIFY_BAD; 2761 2762 INIT_WORK(&net_work->work, cb); 2763 net_work->mlxsw_sp = router->mlxsw_sp; 2764 mlxsw_core_schedule_work(&net_work->work); 2765 return NOTIFY_DONE; 2766 } 2767 2768 static int mlxsw_sp_router_netevent_event(struct notifier_block *nb, 2769 unsigned long event, void *ptr) 2770 { 2771 struct mlxsw_sp_netevent_work *net_work; 2772 struct mlxsw_sp_port *mlxsw_sp_port; 2773 struct mlxsw_sp *mlxsw_sp; 2774 unsigned long interval; 2775 struct neigh_parms *p; 2776 struct neighbour *n; 2777 2778 switch (event) { 2779 case NETEVENT_DELAY_PROBE_TIME_UPDATE: 2780 p = ptr; 2781 2782 /* We don't care about changes in the default table. */ 2783 if (!p->dev || (p->tbl->family != AF_INET && 2784 p->tbl->family != AF_INET6)) 2785 return NOTIFY_DONE; 2786 2787 /* We are in atomic context and can't take RTNL mutex, 2788 * so use RCU variant to walk the device chain. 2789 */ 2790 mlxsw_sp_port = mlxsw_sp_port_lower_dev_hold(p->dev); 2791 if (!mlxsw_sp_port) 2792 return NOTIFY_DONE; 2793 2794 mlxsw_sp = mlxsw_sp_port->mlxsw_sp; 2795 interval = jiffies_to_msecs(NEIGH_VAR(p, DELAY_PROBE_TIME)); 2796 mlxsw_sp->router->neighs_update.interval = interval; 2797 2798 mlxsw_sp_port_dev_put(mlxsw_sp_port); 2799 break; 2800 case NETEVENT_NEIGH_UPDATE: 2801 n = ptr; 2802 2803 if (n->tbl->family != AF_INET && n->tbl->family != AF_INET6) 2804 return NOTIFY_DONE; 2805 2806 mlxsw_sp_port = mlxsw_sp_port_lower_dev_hold(n->dev); 2807 if (!mlxsw_sp_port) 2808 return NOTIFY_DONE; 2809 2810 net_work = kzalloc(sizeof(*net_work), GFP_ATOMIC); 2811 if (!net_work) { 2812 mlxsw_sp_port_dev_put(mlxsw_sp_port); 2813 return NOTIFY_BAD; 2814 } 2815 2816 INIT_WORK(&net_work->work, mlxsw_sp_router_neigh_event_work); 2817 net_work->mlxsw_sp = mlxsw_sp_port->mlxsw_sp; 2818 net_work->n = n; 2819 2820 /* Take a reference to ensure the neighbour won't be 2821 * destructed until we drop the reference in delayed 2822 * work. 2823 */ 2824 neigh_clone(n); 2825 mlxsw_core_schedule_work(&net_work->work); 2826 mlxsw_sp_port_dev_put(mlxsw_sp_port); 2827 break; 2828 case NETEVENT_IPV4_MPATH_HASH_UPDATE: 2829 case NETEVENT_IPV6_MPATH_HASH_UPDATE: 2830 return mlxsw_sp_router_schedule_work(ptr, nb, 2831 mlxsw_sp_router_mp_hash_event_work); 2832 2833 case NETEVENT_IPV4_FWD_UPDATE_PRIORITY_UPDATE: 2834 return mlxsw_sp_router_schedule_work(ptr, nb, 2835 mlxsw_sp_router_update_priority_work); 2836 } 2837 2838 return NOTIFY_DONE; 2839 } 2840 2841 static int mlxsw_sp_neigh_init(struct mlxsw_sp *mlxsw_sp) 2842 { 2843 int err; 2844 2845 err = rhashtable_init(&mlxsw_sp->router->neigh_ht, 2846 &mlxsw_sp_neigh_ht_params); 2847 if (err) 2848 return err; 2849 2850 /* Initialize the polling interval according to the default 2851 * table. 2852 */ 2853 mlxsw_sp_router_neighs_update_interval_init(mlxsw_sp); 2854 2855 /* Create the delayed works for the activity_update */ 2856 INIT_DELAYED_WORK(&mlxsw_sp->router->neighs_update.dw, 2857 mlxsw_sp_router_neighs_update_work); 2858 INIT_DELAYED_WORK(&mlxsw_sp->router->nexthop_probe_dw, 2859 mlxsw_sp_router_probe_unresolved_nexthops); 2860 atomic_set(&mlxsw_sp->router->neighs_update.neigh_count, 0); 2861 mlxsw_core_schedule_dw(&mlxsw_sp->router->neighs_update.dw, 0); 2862 mlxsw_core_schedule_dw(&mlxsw_sp->router->nexthop_probe_dw, 0); 2863 return 0; 2864 } 2865 2866 static void mlxsw_sp_neigh_fini(struct mlxsw_sp *mlxsw_sp) 2867 { 2868 cancel_delayed_work_sync(&mlxsw_sp->router->neighs_update.dw); 2869 cancel_delayed_work_sync(&mlxsw_sp->router->nexthop_probe_dw); 2870 rhashtable_destroy(&mlxsw_sp->router->neigh_ht); 2871 } 2872 2873 static void mlxsw_sp_neigh_rif_gone_sync(struct mlxsw_sp *mlxsw_sp, 2874 struct mlxsw_sp_rif *rif) 2875 { 2876 struct mlxsw_sp_neigh_entry *neigh_entry, *tmp; 2877 2878 list_for_each_entry_safe(neigh_entry, tmp, &rif->neigh_list, 2879 rif_list_node) { 2880 mlxsw_sp_neigh_entry_update(mlxsw_sp, neigh_entry, false); 2881 mlxsw_sp_neigh_entry_destroy(mlxsw_sp, neigh_entry); 2882 } 2883 } 2884 2885 enum mlxsw_sp_nexthop_type { 2886 MLXSW_SP_NEXTHOP_TYPE_ETH, 2887 MLXSW_SP_NEXTHOP_TYPE_IPIP, 2888 }; 2889 2890 enum mlxsw_sp_nexthop_action { 2891 /* Nexthop forwards packets to an egress RIF */ 2892 MLXSW_SP_NEXTHOP_ACTION_FORWARD, 2893 /* Nexthop discards packets */ 2894 MLXSW_SP_NEXTHOP_ACTION_DISCARD, 2895 /* Nexthop traps packets */ 2896 MLXSW_SP_NEXTHOP_ACTION_TRAP, 2897 }; 2898 2899 struct mlxsw_sp_nexthop_key { 2900 struct fib_nh *fib_nh; 2901 }; 2902 2903 struct mlxsw_sp_nexthop { 2904 struct list_head neigh_list_node; /* member of neigh entry list */ 2905 struct list_head rif_list_node; 2906 struct list_head router_list_node; 2907 struct mlxsw_sp_nexthop_group_info *nhgi; /* pointer back to the group 2908 * this nexthop belongs to 2909 */ 2910 struct rhash_head ht_node; 2911 struct neigh_table *neigh_tbl; 2912 struct mlxsw_sp_nexthop_key key; 2913 unsigned char gw_addr[sizeof(struct in6_addr)]; 2914 int ifindex; 2915 int nh_weight; 2916 int norm_nh_weight; 2917 int num_adj_entries; 2918 struct mlxsw_sp_rif *rif; 2919 u8 should_offload:1, /* set indicates this nexthop should be written 2920 * to the adjacency table. 2921 */ 2922 offloaded:1, /* set indicates this nexthop was written to the 2923 * adjacency table. 2924 */ 2925 update:1; /* set indicates this nexthop should be updated in the 2926 * adjacency table (f.e., its MAC changed). 2927 */ 2928 enum mlxsw_sp_nexthop_action action; 2929 enum mlxsw_sp_nexthop_type type; 2930 union { 2931 struct mlxsw_sp_neigh_entry *neigh_entry; 2932 struct mlxsw_sp_ipip_entry *ipip_entry; 2933 }; 2934 unsigned int counter_index; 2935 bool counter_valid; 2936 }; 2937 2938 enum mlxsw_sp_nexthop_group_type { 2939 MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV4, 2940 MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV6, 2941 MLXSW_SP_NEXTHOP_GROUP_TYPE_OBJ, 2942 }; 2943 2944 struct mlxsw_sp_nexthop_group_info { 2945 struct mlxsw_sp_nexthop_group *nh_grp; 2946 u32 adj_index; 2947 u16 ecmp_size; 2948 u16 count; 2949 int sum_norm_weight; 2950 u8 adj_index_valid:1, 2951 gateway:1, /* routes using the group use a gateway */ 2952 is_resilient:1; 2953 struct list_head list; /* member in nh_res_grp_list */ 2954 struct mlxsw_sp_nexthop nexthops[]; 2955 #define nh_rif nexthops[0].rif 2956 }; 2957 2958 struct mlxsw_sp_nexthop_group_vr_key { 2959 u16 vr_id; 2960 enum mlxsw_sp_l3proto proto; 2961 }; 2962 2963 struct mlxsw_sp_nexthop_group_vr_entry { 2964 struct list_head list; /* member in vr_list */ 2965 struct rhash_head ht_node; /* member in vr_ht */ 2966 refcount_t ref_count; 2967 struct mlxsw_sp_nexthop_group_vr_key key; 2968 }; 2969 2970 struct mlxsw_sp_nexthop_group { 2971 struct rhash_head ht_node; 2972 struct list_head fib_list; /* list of fib entries that use this group */ 2973 union { 2974 struct { 2975 struct fib_info *fi; 2976 } ipv4; 2977 struct { 2978 u32 id; 2979 } obj; 2980 }; 2981 struct mlxsw_sp_nexthop_group_info *nhgi; 2982 struct list_head vr_list; 2983 struct rhashtable vr_ht; 2984 enum mlxsw_sp_nexthop_group_type type; 2985 bool can_destroy; 2986 }; 2987 2988 void mlxsw_sp_nexthop_counter_alloc(struct mlxsw_sp *mlxsw_sp, 2989 struct mlxsw_sp_nexthop *nh) 2990 { 2991 struct devlink *devlink; 2992 2993 devlink = priv_to_devlink(mlxsw_sp->core); 2994 if (!devlink_dpipe_table_counter_enabled(devlink, 2995 MLXSW_SP_DPIPE_TABLE_NAME_ADJ)) 2996 return; 2997 2998 if (mlxsw_sp_flow_counter_alloc(mlxsw_sp, &nh->counter_index)) 2999 return; 3000 3001 nh->counter_valid = true; 3002 } 3003 3004 void mlxsw_sp_nexthop_counter_free(struct mlxsw_sp *mlxsw_sp, 3005 struct mlxsw_sp_nexthop *nh) 3006 { 3007 if (!nh->counter_valid) 3008 return; 3009 mlxsw_sp_flow_counter_free(mlxsw_sp, nh->counter_index); 3010 nh->counter_valid = false; 3011 } 3012 3013 int mlxsw_sp_nexthop_counter_get(struct mlxsw_sp *mlxsw_sp, 3014 struct mlxsw_sp_nexthop *nh, u64 *p_counter) 3015 { 3016 if (!nh->counter_valid) 3017 return -EINVAL; 3018 3019 return mlxsw_sp_flow_counter_get(mlxsw_sp, nh->counter_index, 3020 p_counter, NULL); 3021 } 3022 3023 struct mlxsw_sp_nexthop *mlxsw_sp_nexthop_next(struct mlxsw_sp_router *router, 3024 struct mlxsw_sp_nexthop *nh) 3025 { 3026 if (!nh) { 3027 if (list_empty(&router->nexthop_list)) 3028 return NULL; 3029 else 3030 return list_first_entry(&router->nexthop_list, 3031 typeof(*nh), router_list_node); 3032 } 3033 if (list_is_last(&nh->router_list_node, &router->nexthop_list)) 3034 return NULL; 3035 return list_next_entry(nh, router_list_node); 3036 } 3037 3038 bool mlxsw_sp_nexthop_is_forward(const struct mlxsw_sp_nexthop *nh) 3039 { 3040 return nh->offloaded && nh->action == MLXSW_SP_NEXTHOP_ACTION_FORWARD; 3041 } 3042 3043 unsigned char *mlxsw_sp_nexthop_ha(struct mlxsw_sp_nexthop *nh) 3044 { 3045 if (nh->type != MLXSW_SP_NEXTHOP_TYPE_ETH || 3046 !mlxsw_sp_nexthop_is_forward(nh)) 3047 return NULL; 3048 return nh->neigh_entry->ha; 3049 } 3050 3051 int mlxsw_sp_nexthop_indexes(struct mlxsw_sp_nexthop *nh, u32 *p_adj_index, 3052 u32 *p_adj_size, u32 *p_adj_hash_index) 3053 { 3054 struct mlxsw_sp_nexthop_group_info *nhgi = nh->nhgi; 3055 u32 adj_hash_index = 0; 3056 int i; 3057 3058 if (!nh->offloaded || !nhgi->adj_index_valid) 3059 return -EINVAL; 3060 3061 *p_adj_index = nhgi->adj_index; 3062 *p_adj_size = nhgi->ecmp_size; 3063 3064 for (i = 0; i < nhgi->count; i++) { 3065 struct mlxsw_sp_nexthop *nh_iter = &nhgi->nexthops[i]; 3066 3067 if (nh_iter == nh) 3068 break; 3069 if (nh_iter->offloaded) 3070 adj_hash_index += nh_iter->num_adj_entries; 3071 } 3072 3073 *p_adj_hash_index = adj_hash_index; 3074 return 0; 3075 } 3076 3077 struct mlxsw_sp_rif *mlxsw_sp_nexthop_rif(struct mlxsw_sp_nexthop *nh) 3078 { 3079 return nh->rif; 3080 } 3081 3082 bool mlxsw_sp_nexthop_group_has_ipip(struct mlxsw_sp_nexthop *nh) 3083 { 3084 struct mlxsw_sp_nexthop_group_info *nhgi = nh->nhgi; 3085 int i; 3086 3087 for (i = 0; i < nhgi->count; i++) { 3088 struct mlxsw_sp_nexthop *nh_iter = &nhgi->nexthops[i]; 3089 3090 if (nh_iter->type == MLXSW_SP_NEXTHOP_TYPE_IPIP) 3091 return true; 3092 } 3093 return false; 3094 } 3095 3096 static const struct rhashtable_params mlxsw_sp_nexthop_group_vr_ht_params = { 3097 .key_offset = offsetof(struct mlxsw_sp_nexthop_group_vr_entry, key), 3098 .head_offset = offsetof(struct mlxsw_sp_nexthop_group_vr_entry, ht_node), 3099 .key_len = sizeof(struct mlxsw_sp_nexthop_group_vr_key), 3100 .automatic_shrinking = true, 3101 }; 3102 3103 static struct mlxsw_sp_nexthop_group_vr_entry * 3104 mlxsw_sp_nexthop_group_vr_entry_lookup(struct mlxsw_sp_nexthop_group *nh_grp, 3105 const struct mlxsw_sp_fib *fib) 3106 { 3107 struct mlxsw_sp_nexthop_group_vr_key key; 3108 3109 memset(&key, 0, sizeof(key)); 3110 key.vr_id = fib->vr->id; 3111 key.proto = fib->proto; 3112 return rhashtable_lookup_fast(&nh_grp->vr_ht, &key, 3113 mlxsw_sp_nexthop_group_vr_ht_params); 3114 } 3115 3116 static int 3117 mlxsw_sp_nexthop_group_vr_entry_create(struct mlxsw_sp_nexthop_group *nh_grp, 3118 const struct mlxsw_sp_fib *fib) 3119 { 3120 struct mlxsw_sp_nexthop_group_vr_entry *vr_entry; 3121 int err; 3122 3123 vr_entry = kzalloc(sizeof(*vr_entry), GFP_KERNEL); 3124 if (!vr_entry) 3125 return -ENOMEM; 3126 3127 vr_entry->key.vr_id = fib->vr->id; 3128 vr_entry->key.proto = fib->proto; 3129 refcount_set(&vr_entry->ref_count, 1); 3130 3131 err = rhashtable_insert_fast(&nh_grp->vr_ht, &vr_entry->ht_node, 3132 mlxsw_sp_nexthop_group_vr_ht_params); 3133 if (err) 3134 goto err_hashtable_insert; 3135 3136 list_add(&vr_entry->list, &nh_grp->vr_list); 3137 3138 return 0; 3139 3140 err_hashtable_insert: 3141 kfree(vr_entry); 3142 return err; 3143 } 3144 3145 static void 3146 mlxsw_sp_nexthop_group_vr_entry_destroy(struct mlxsw_sp_nexthop_group *nh_grp, 3147 struct mlxsw_sp_nexthop_group_vr_entry *vr_entry) 3148 { 3149 list_del(&vr_entry->list); 3150 rhashtable_remove_fast(&nh_grp->vr_ht, &vr_entry->ht_node, 3151 mlxsw_sp_nexthop_group_vr_ht_params); 3152 kfree(vr_entry); 3153 } 3154 3155 static int 3156 mlxsw_sp_nexthop_group_vr_link(struct mlxsw_sp_nexthop_group *nh_grp, 3157 const struct mlxsw_sp_fib *fib) 3158 { 3159 struct mlxsw_sp_nexthop_group_vr_entry *vr_entry; 3160 3161 vr_entry = mlxsw_sp_nexthop_group_vr_entry_lookup(nh_grp, fib); 3162 if (vr_entry) { 3163 refcount_inc(&vr_entry->ref_count); 3164 return 0; 3165 } 3166 3167 return mlxsw_sp_nexthop_group_vr_entry_create(nh_grp, fib); 3168 } 3169 3170 static void 3171 mlxsw_sp_nexthop_group_vr_unlink(struct mlxsw_sp_nexthop_group *nh_grp, 3172 const struct mlxsw_sp_fib *fib) 3173 { 3174 struct mlxsw_sp_nexthop_group_vr_entry *vr_entry; 3175 3176 vr_entry = mlxsw_sp_nexthop_group_vr_entry_lookup(nh_grp, fib); 3177 if (WARN_ON_ONCE(!vr_entry)) 3178 return; 3179 3180 if (!refcount_dec_and_test(&vr_entry->ref_count)) 3181 return; 3182 3183 mlxsw_sp_nexthop_group_vr_entry_destroy(nh_grp, vr_entry); 3184 } 3185 3186 struct mlxsw_sp_nexthop_group_cmp_arg { 3187 enum mlxsw_sp_nexthop_group_type type; 3188 union { 3189 struct fib_info *fi; 3190 struct mlxsw_sp_fib6_entry *fib6_entry; 3191 u32 id; 3192 }; 3193 }; 3194 3195 static bool 3196 mlxsw_sp_nexthop6_group_has_nexthop(const struct mlxsw_sp_nexthop_group *nh_grp, 3197 const struct in6_addr *gw, int ifindex, 3198 int weight) 3199 { 3200 int i; 3201 3202 for (i = 0; i < nh_grp->nhgi->count; i++) { 3203 const struct mlxsw_sp_nexthop *nh; 3204 3205 nh = &nh_grp->nhgi->nexthops[i]; 3206 if (nh->ifindex == ifindex && nh->nh_weight == weight && 3207 ipv6_addr_equal(gw, (struct in6_addr *) nh->gw_addr)) 3208 return true; 3209 } 3210 3211 return false; 3212 } 3213 3214 static bool 3215 mlxsw_sp_nexthop6_group_cmp(const struct mlxsw_sp_nexthop_group *nh_grp, 3216 const struct mlxsw_sp_fib6_entry *fib6_entry) 3217 { 3218 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 3219 3220 if (nh_grp->nhgi->count != fib6_entry->nrt6) 3221 return false; 3222 3223 list_for_each_entry(mlxsw_sp_rt6, &fib6_entry->rt6_list, list) { 3224 struct fib6_nh *fib6_nh = mlxsw_sp_rt6->rt->fib6_nh; 3225 struct in6_addr *gw; 3226 int ifindex, weight; 3227 3228 ifindex = fib6_nh->fib_nh_dev->ifindex; 3229 weight = fib6_nh->fib_nh_weight; 3230 gw = &fib6_nh->fib_nh_gw6; 3231 if (!mlxsw_sp_nexthop6_group_has_nexthop(nh_grp, gw, ifindex, 3232 weight)) 3233 return false; 3234 } 3235 3236 return true; 3237 } 3238 3239 static int 3240 mlxsw_sp_nexthop_group_cmp(struct rhashtable_compare_arg *arg, const void *ptr) 3241 { 3242 const struct mlxsw_sp_nexthop_group_cmp_arg *cmp_arg = arg->key; 3243 const struct mlxsw_sp_nexthop_group *nh_grp = ptr; 3244 3245 if (nh_grp->type != cmp_arg->type) 3246 return 1; 3247 3248 switch (cmp_arg->type) { 3249 case MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV4: 3250 return cmp_arg->fi != nh_grp->ipv4.fi; 3251 case MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV6: 3252 return !mlxsw_sp_nexthop6_group_cmp(nh_grp, 3253 cmp_arg->fib6_entry); 3254 case MLXSW_SP_NEXTHOP_GROUP_TYPE_OBJ: 3255 return cmp_arg->id != nh_grp->obj.id; 3256 default: 3257 WARN_ON(1); 3258 return 1; 3259 } 3260 } 3261 3262 static u32 mlxsw_sp_nexthop_group_hash_obj(const void *data, u32 len, u32 seed) 3263 { 3264 const struct mlxsw_sp_nexthop_group *nh_grp = data; 3265 const struct mlxsw_sp_nexthop *nh; 3266 struct fib_info *fi; 3267 unsigned int val; 3268 int i; 3269 3270 switch (nh_grp->type) { 3271 case MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV4: 3272 fi = nh_grp->ipv4.fi; 3273 return jhash(&fi, sizeof(fi), seed); 3274 case MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV6: 3275 val = nh_grp->nhgi->count; 3276 for (i = 0; i < nh_grp->nhgi->count; i++) { 3277 nh = &nh_grp->nhgi->nexthops[i]; 3278 val ^= jhash(&nh->ifindex, sizeof(nh->ifindex), seed); 3279 val ^= jhash(&nh->gw_addr, sizeof(nh->gw_addr), seed); 3280 } 3281 return jhash(&val, sizeof(val), seed); 3282 case MLXSW_SP_NEXTHOP_GROUP_TYPE_OBJ: 3283 return jhash(&nh_grp->obj.id, sizeof(nh_grp->obj.id), seed); 3284 default: 3285 WARN_ON(1); 3286 return 0; 3287 } 3288 } 3289 3290 static u32 3291 mlxsw_sp_nexthop6_group_hash(struct mlxsw_sp_fib6_entry *fib6_entry, u32 seed) 3292 { 3293 unsigned int val = fib6_entry->nrt6; 3294 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 3295 3296 list_for_each_entry(mlxsw_sp_rt6, &fib6_entry->rt6_list, list) { 3297 struct fib6_nh *fib6_nh = mlxsw_sp_rt6->rt->fib6_nh; 3298 struct net_device *dev = fib6_nh->fib_nh_dev; 3299 struct in6_addr *gw = &fib6_nh->fib_nh_gw6; 3300 3301 val ^= jhash(&dev->ifindex, sizeof(dev->ifindex), seed); 3302 val ^= jhash(gw, sizeof(*gw), seed); 3303 } 3304 3305 return jhash(&val, sizeof(val), seed); 3306 } 3307 3308 static u32 3309 mlxsw_sp_nexthop_group_hash(const void *data, u32 len, u32 seed) 3310 { 3311 const struct mlxsw_sp_nexthop_group_cmp_arg *cmp_arg = data; 3312 3313 switch (cmp_arg->type) { 3314 case MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV4: 3315 return jhash(&cmp_arg->fi, sizeof(cmp_arg->fi), seed); 3316 case MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV6: 3317 return mlxsw_sp_nexthop6_group_hash(cmp_arg->fib6_entry, seed); 3318 case MLXSW_SP_NEXTHOP_GROUP_TYPE_OBJ: 3319 return jhash(&cmp_arg->id, sizeof(cmp_arg->id), seed); 3320 default: 3321 WARN_ON(1); 3322 return 0; 3323 } 3324 } 3325 3326 static const struct rhashtable_params mlxsw_sp_nexthop_group_ht_params = { 3327 .head_offset = offsetof(struct mlxsw_sp_nexthop_group, ht_node), 3328 .hashfn = mlxsw_sp_nexthop_group_hash, 3329 .obj_hashfn = mlxsw_sp_nexthop_group_hash_obj, 3330 .obj_cmpfn = mlxsw_sp_nexthop_group_cmp, 3331 }; 3332 3333 static int mlxsw_sp_nexthop_group_insert(struct mlxsw_sp *mlxsw_sp, 3334 struct mlxsw_sp_nexthop_group *nh_grp) 3335 { 3336 if (nh_grp->type == MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV6 && 3337 !nh_grp->nhgi->gateway) 3338 return 0; 3339 3340 return rhashtable_insert_fast(&mlxsw_sp->router->nexthop_group_ht, 3341 &nh_grp->ht_node, 3342 mlxsw_sp_nexthop_group_ht_params); 3343 } 3344 3345 static void mlxsw_sp_nexthop_group_remove(struct mlxsw_sp *mlxsw_sp, 3346 struct mlxsw_sp_nexthop_group *nh_grp) 3347 { 3348 if (nh_grp->type == MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV6 && 3349 !nh_grp->nhgi->gateway) 3350 return; 3351 3352 rhashtable_remove_fast(&mlxsw_sp->router->nexthop_group_ht, 3353 &nh_grp->ht_node, 3354 mlxsw_sp_nexthop_group_ht_params); 3355 } 3356 3357 static struct mlxsw_sp_nexthop_group * 3358 mlxsw_sp_nexthop4_group_lookup(struct mlxsw_sp *mlxsw_sp, 3359 struct fib_info *fi) 3360 { 3361 struct mlxsw_sp_nexthop_group_cmp_arg cmp_arg; 3362 3363 cmp_arg.type = MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV4; 3364 cmp_arg.fi = fi; 3365 return rhashtable_lookup_fast(&mlxsw_sp->router->nexthop_group_ht, 3366 &cmp_arg, 3367 mlxsw_sp_nexthop_group_ht_params); 3368 } 3369 3370 static struct mlxsw_sp_nexthop_group * 3371 mlxsw_sp_nexthop6_group_lookup(struct mlxsw_sp *mlxsw_sp, 3372 struct mlxsw_sp_fib6_entry *fib6_entry) 3373 { 3374 struct mlxsw_sp_nexthop_group_cmp_arg cmp_arg; 3375 3376 cmp_arg.type = MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV6; 3377 cmp_arg.fib6_entry = fib6_entry; 3378 return rhashtable_lookup_fast(&mlxsw_sp->router->nexthop_group_ht, 3379 &cmp_arg, 3380 mlxsw_sp_nexthop_group_ht_params); 3381 } 3382 3383 static const struct rhashtable_params mlxsw_sp_nexthop_ht_params = { 3384 .key_offset = offsetof(struct mlxsw_sp_nexthop, key), 3385 .head_offset = offsetof(struct mlxsw_sp_nexthop, ht_node), 3386 .key_len = sizeof(struct mlxsw_sp_nexthop_key), 3387 }; 3388 3389 static int mlxsw_sp_nexthop_insert(struct mlxsw_sp *mlxsw_sp, 3390 struct mlxsw_sp_nexthop *nh) 3391 { 3392 return rhashtable_insert_fast(&mlxsw_sp->router->nexthop_ht, 3393 &nh->ht_node, mlxsw_sp_nexthop_ht_params); 3394 } 3395 3396 static void mlxsw_sp_nexthop_remove(struct mlxsw_sp *mlxsw_sp, 3397 struct mlxsw_sp_nexthop *nh) 3398 { 3399 rhashtable_remove_fast(&mlxsw_sp->router->nexthop_ht, &nh->ht_node, 3400 mlxsw_sp_nexthop_ht_params); 3401 } 3402 3403 static struct mlxsw_sp_nexthop * 3404 mlxsw_sp_nexthop_lookup(struct mlxsw_sp *mlxsw_sp, 3405 struct mlxsw_sp_nexthop_key key) 3406 { 3407 return rhashtable_lookup_fast(&mlxsw_sp->router->nexthop_ht, &key, 3408 mlxsw_sp_nexthop_ht_params); 3409 } 3410 3411 static int mlxsw_sp_adj_index_mass_update_vr(struct mlxsw_sp *mlxsw_sp, 3412 enum mlxsw_sp_l3proto proto, 3413 u16 vr_id, 3414 u32 adj_index, u16 ecmp_size, 3415 u32 new_adj_index, 3416 u16 new_ecmp_size) 3417 { 3418 char raleu_pl[MLXSW_REG_RALEU_LEN]; 3419 3420 mlxsw_reg_raleu_pack(raleu_pl, 3421 (enum mlxsw_reg_ralxx_protocol) proto, vr_id, 3422 adj_index, ecmp_size, new_adj_index, 3423 new_ecmp_size); 3424 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(raleu), raleu_pl); 3425 } 3426 3427 static int mlxsw_sp_adj_index_mass_update(struct mlxsw_sp *mlxsw_sp, 3428 struct mlxsw_sp_nexthop_group *nh_grp, 3429 u32 old_adj_index, u16 old_ecmp_size) 3430 { 3431 struct mlxsw_sp_nexthop_group_info *nhgi = nh_grp->nhgi; 3432 struct mlxsw_sp_nexthop_group_vr_entry *vr_entry; 3433 int err; 3434 3435 list_for_each_entry(vr_entry, &nh_grp->vr_list, list) { 3436 err = mlxsw_sp_adj_index_mass_update_vr(mlxsw_sp, 3437 vr_entry->key.proto, 3438 vr_entry->key.vr_id, 3439 old_adj_index, 3440 old_ecmp_size, 3441 nhgi->adj_index, 3442 nhgi->ecmp_size); 3443 if (err) 3444 goto err_mass_update_vr; 3445 } 3446 return 0; 3447 3448 err_mass_update_vr: 3449 list_for_each_entry_continue_reverse(vr_entry, &nh_grp->vr_list, list) 3450 mlxsw_sp_adj_index_mass_update_vr(mlxsw_sp, vr_entry->key.proto, 3451 vr_entry->key.vr_id, 3452 nhgi->adj_index, 3453 nhgi->ecmp_size, 3454 old_adj_index, old_ecmp_size); 3455 return err; 3456 } 3457 3458 static int __mlxsw_sp_nexthop_eth_update(struct mlxsw_sp *mlxsw_sp, 3459 u32 adj_index, 3460 struct mlxsw_sp_nexthop *nh, 3461 bool force, char *ratr_pl) 3462 { 3463 struct mlxsw_sp_neigh_entry *neigh_entry = nh->neigh_entry; 3464 enum mlxsw_reg_ratr_op op; 3465 u16 rif_index; 3466 3467 rif_index = nh->rif ? nh->rif->rif_index : 3468 mlxsw_sp->router->lb_rif_index; 3469 op = force ? MLXSW_REG_RATR_OP_WRITE_WRITE_ENTRY : 3470 MLXSW_REG_RATR_OP_WRITE_WRITE_ENTRY_ON_ACTIVITY; 3471 mlxsw_reg_ratr_pack(ratr_pl, op, true, MLXSW_REG_RATR_TYPE_ETHERNET, 3472 adj_index, rif_index); 3473 switch (nh->action) { 3474 case MLXSW_SP_NEXTHOP_ACTION_FORWARD: 3475 mlxsw_reg_ratr_eth_entry_pack(ratr_pl, neigh_entry->ha); 3476 break; 3477 case MLXSW_SP_NEXTHOP_ACTION_DISCARD: 3478 mlxsw_reg_ratr_trap_action_set(ratr_pl, 3479 MLXSW_REG_RATR_TRAP_ACTION_DISCARD_ERRORS); 3480 break; 3481 case MLXSW_SP_NEXTHOP_ACTION_TRAP: 3482 mlxsw_reg_ratr_trap_action_set(ratr_pl, 3483 MLXSW_REG_RATR_TRAP_ACTION_TRAP); 3484 mlxsw_reg_ratr_trap_id_set(ratr_pl, MLXSW_TRAP_ID_RTR_EGRESS0); 3485 break; 3486 default: 3487 WARN_ON_ONCE(1); 3488 return -EINVAL; 3489 } 3490 if (nh->counter_valid) 3491 mlxsw_reg_ratr_counter_pack(ratr_pl, nh->counter_index, true); 3492 else 3493 mlxsw_reg_ratr_counter_pack(ratr_pl, 0, false); 3494 3495 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ratr), ratr_pl); 3496 } 3497 3498 int mlxsw_sp_nexthop_eth_update(struct mlxsw_sp *mlxsw_sp, u32 adj_index, 3499 struct mlxsw_sp_nexthop *nh, bool force, 3500 char *ratr_pl) 3501 { 3502 int i; 3503 3504 for (i = 0; i < nh->num_adj_entries; i++) { 3505 int err; 3506 3507 err = __mlxsw_sp_nexthop_eth_update(mlxsw_sp, adj_index + i, 3508 nh, force, ratr_pl); 3509 if (err) 3510 return err; 3511 } 3512 3513 return 0; 3514 } 3515 3516 static int __mlxsw_sp_nexthop_ipip_update(struct mlxsw_sp *mlxsw_sp, 3517 u32 adj_index, 3518 struct mlxsw_sp_nexthop *nh, 3519 bool force, char *ratr_pl) 3520 { 3521 const struct mlxsw_sp_ipip_ops *ipip_ops; 3522 3523 ipip_ops = mlxsw_sp->router->ipip_ops_arr[nh->ipip_entry->ipipt]; 3524 return ipip_ops->nexthop_update(mlxsw_sp, adj_index, nh->ipip_entry, 3525 force, ratr_pl); 3526 } 3527 3528 static int mlxsw_sp_nexthop_ipip_update(struct mlxsw_sp *mlxsw_sp, 3529 u32 adj_index, 3530 struct mlxsw_sp_nexthop *nh, bool force, 3531 char *ratr_pl) 3532 { 3533 int i; 3534 3535 for (i = 0; i < nh->num_adj_entries; i++) { 3536 int err; 3537 3538 err = __mlxsw_sp_nexthop_ipip_update(mlxsw_sp, adj_index + i, 3539 nh, force, ratr_pl); 3540 if (err) 3541 return err; 3542 } 3543 3544 return 0; 3545 } 3546 3547 static int mlxsw_sp_nexthop_update(struct mlxsw_sp *mlxsw_sp, u32 adj_index, 3548 struct mlxsw_sp_nexthop *nh, bool force, 3549 char *ratr_pl) 3550 { 3551 /* When action is discard or trap, the nexthop must be 3552 * programmed as an Ethernet nexthop. 3553 */ 3554 if (nh->type == MLXSW_SP_NEXTHOP_TYPE_ETH || 3555 nh->action == MLXSW_SP_NEXTHOP_ACTION_DISCARD || 3556 nh->action == MLXSW_SP_NEXTHOP_ACTION_TRAP) 3557 return mlxsw_sp_nexthop_eth_update(mlxsw_sp, adj_index, nh, 3558 force, ratr_pl); 3559 else 3560 return mlxsw_sp_nexthop_ipip_update(mlxsw_sp, adj_index, nh, 3561 force, ratr_pl); 3562 } 3563 3564 static int 3565 mlxsw_sp_nexthop_group_update(struct mlxsw_sp *mlxsw_sp, 3566 struct mlxsw_sp_nexthop_group_info *nhgi, 3567 bool reallocate) 3568 { 3569 char ratr_pl[MLXSW_REG_RATR_LEN]; 3570 u32 adj_index = nhgi->adj_index; /* base */ 3571 struct mlxsw_sp_nexthop *nh; 3572 int i; 3573 3574 for (i = 0; i < nhgi->count; i++) { 3575 nh = &nhgi->nexthops[i]; 3576 3577 if (!nh->should_offload) { 3578 nh->offloaded = 0; 3579 continue; 3580 } 3581 3582 if (nh->update || reallocate) { 3583 int err = 0; 3584 3585 err = mlxsw_sp_nexthop_update(mlxsw_sp, adj_index, nh, 3586 true, ratr_pl); 3587 if (err) 3588 return err; 3589 nh->update = 0; 3590 nh->offloaded = 1; 3591 } 3592 adj_index += nh->num_adj_entries; 3593 } 3594 return 0; 3595 } 3596 3597 static int 3598 mlxsw_sp_nexthop_fib_entries_update(struct mlxsw_sp *mlxsw_sp, 3599 struct mlxsw_sp_nexthop_group *nh_grp) 3600 { 3601 struct mlxsw_sp_fib_entry *fib_entry; 3602 int err; 3603 3604 list_for_each_entry(fib_entry, &nh_grp->fib_list, nexthop_group_node) { 3605 err = mlxsw_sp_fib_entry_update(mlxsw_sp, fib_entry); 3606 if (err) 3607 return err; 3608 } 3609 return 0; 3610 } 3611 3612 struct mlxsw_sp_adj_grp_size_range { 3613 u16 start; /* Inclusive */ 3614 u16 end; /* Inclusive */ 3615 }; 3616 3617 /* Ordered by range start value */ 3618 static const struct mlxsw_sp_adj_grp_size_range 3619 mlxsw_sp1_adj_grp_size_ranges[] = { 3620 { .start = 1, .end = 64 }, 3621 { .start = 512, .end = 512 }, 3622 { .start = 1024, .end = 1024 }, 3623 { .start = 2048, .end = 2048 }, 3624 { .start = 4096, .end = 4096 }, 3625 }; 3626 3627 /* Ordered by range start value */ 3628 static const struct mlxsw_sp_adj_grp_size_range 3629 mlxsw_sp2_adj_grp_size_ranges[] = { 3630 { .start = 1, .end = 128 }, 3631 { .start = 256, .end = 256 }, 3632 { .start = 512, .end = 512 }, 3633 { .start = 1024, .end = 1024 }, 3634 { .start = 2048, .end = 2048 }, 3635 { .start = 4096, .end = 4096 }, 3636 }; 3637 3638 static void mlxsw_sp_adj_grp_size_round_up(const struct mlxsw_sp *mlxsw_sp, 3639 u16 *p_adj_grp_size) 3640 { 3641 int i; 3642 3643 for (i = 0; i < mlxsw_sp->router->adj_grp_size_ranges_count; i++) { 3644 const struct mlxsw_sp_adj_grp_size_range *size_range; 3645 3646 size_range = &mlxsw_sp->router->adj_grp_size_ranges[i]; 3647 3648 if (*p_adj_grp_size >= size_range->start && 3649 *p_adj_grp_size <= size_range->end) 3650 return; 3651 3652 if (*p_adj_grp_size <= size_range->end) { 3653 *p_adj_grp_size = size_range->end; 3654 return; 3655 } 3656 } 3657 } 3658 3659 static void mlxsw_sp_adj_grp_size_round_down(const struct mlxsw_sp *mlxsw_sp, 3660 u16 *p_adj_grp_size, 3661 unsigned int alloc_size) 3662 { 3663 int i; 3664 3665 for (i = mlxsw_sp->router->adj_grp_size_ranges_count - 1; i >= 0; i--) { 3666 const struct mlxsw_sp_adj_grp_size_range *size_range; 3667 3668 size_range = &mlxsw_sp->router->adj_grp_size_ranges[i]; 3669 3670 if (alloc_size >= size_range->end) { 3671 *p_adj_grp_size = size_range->end; 3672 return; 3673 } 3674 } 3675 } 3676 3677 static int mlxsw_sp_fix_adj_grp_size(struct mlxsw_sp *mlxsw_sp, 3678 u16 *p_adj_grp_size) 3679 { 3680 unsigned int alloc_size; 3681 int err; 3682 3683 /* Round up the requested group size to the next size supported 3684 * by the device and make sure the request can be satisfied. 3685 */ 3686 mlxsw_sp_adj_grp_size_round_up(mlxsw_sp, p_adj_grp_size); 3687 err = mlxsw_sp_kvdl_alloc_count_query(mlxsw_sp, 3688 MLXSW_SP_KVDL_ENTRY_TYPE_ADJ, 3689 *p_adj_grp_size, &alloc_size); 3690 if (err) 3691 return err; 3692 /* It is possible the allocation results in more allocated 3693 * entries than requested. Try to use as much of them as 3694 * possible. 3695 */ 3696 mlxsw_sp_adj_grp_size_round_down(mlxsw_sp, p_adj_grp_size, alloc_size); 3697 3698 return 0; 3699 } 3700 3701 static void 3702 mlxsw_sp_nexthop_group_normalize(struct mlxsw_sp_nexthop_group_info *nhgi) 3703 { 3704 int i, g = 0, sum_norm_weight = 0; 3705 struct mlxsw_sp_nexthop *nh; 3706 3707 for (i = 0; i < nhgi->count; i++) { 3708 nh = &nhgi->nexthops[i]; 3709 3710 if (!nh->should_offload) 3711 continue; 3712 if (g > 0) 3713 g = gcd(nh->nh_weight, g); 3714 else 3715 g = nh->nh_weight; 3716 } 3717 3718 for (i = 0; i < nhgi->count; i++) { 3719 nh = &nhgi->nexthops[i]; 3720 3721 if (!nh->should_offload) 3722 continue; 3723 nh->norm_nh_weight = nh->nh_weight / g; 3724 sum_norm_weight += nh->norm_nh_weight; 3725 } 3726 3727 nhgi->sum_norm_weight = sum_norm_weight; 3728 } 3729 3730 static void 3731 mlxsw_sp_nexthop_group_rebalance(struct mlxsw_sp_nexthop_group_info *nhgi) 3732 { 3733 int i, weight = 0, lower_bound = 0; 3734 int total = nhgi->sum_norm_weight; 3735 u16 ecmp_size = nhgi->ecmp_size; 3736 3737 for (i = 0; i < nhgi->count; i++) { 3738 struct mlxsw_sp_nexthop *nh = &nhgi->nexthops[i]; 3739 int upper_bound; 3740 3741 if (!nh->should_offload) 3742 continue; 3743 weight += nh->norm_nh_weight; 3744 upper_bound = DIV_ROUND_CLOSEST(ecmp_size * weight, total); 3745 nh->num_adj_entries = upper_bound - lower_bound; 3746 lower_bound = upper_bound; 3747 } 3748 } 3749 3750 static struct mlxsw_sp_nexthop * 3751 mlxsw_sp_rt6_nexthop(struct mlxsw_sp_nexthop_group *nh_grp, 3752 const struct mlxsw_sp_rt6 *mlxsw_sp_rt6); 3753 3754 static void 3755 mlxsw_sp_nexthop4_group_offload_refresh(struct mlxsw_sp *mlxsw_sp, 3756 struct mlxsw_sp_nexthop_group *nh_grp) 3757 { 3758 int i; 3759 3760 for (i = 0; i < nh_grp->nhgi->count; i++) { 3761 struct mlxsw_sp_nexthop *nh = &nh_grp->nhgi->nexthops[i]; 3762 3763 if (nh->offloaded) 3764 nh->key.fib_nh->fib_nh_flags |= RTNH_F_OFFLOAD; 3765 else 3766 nh->key.fib_nh->fib_nh_flags &= ~RTNH_F_OFFLOAD; 3767 } 3768 } 3769 3770 static void 3771 __mlxsw_sp_nexthop6_group_offload_refresh(struct mlxsw_sp_nexthop_group *nh_grp, 3772 struct mlxsw_sp_fib6_entry *fib6_entry) 3773 { 3774 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 3775 3776 list_for_each_entry(mlxsw_sp_rt6, &fib6_entry->rt6_list, list) { 3777 struct fib6_nh *fib6_nh = mlxsw_sp_rt6->rt->fib6_nh; 3778 struct mlxsw_sp_nexthop *nh; 3779 3780 nh = mlxsw_sp_rt6_nexthop(nh_grp, mlxsw_sp_rt6); 3781 if (nh && nh->offloaded) 3782 fib6_nh->fib_nh_flags |= RTNH_F_OFFLOAD; 3783 else 3784 fib6_nh->fib_nh_flags &= ~RTNH_F_OFFLOAD; 3785 } 3786 } 3787 3788 static void 3789 mlxsw_sp_nexthop6_group_offload_refresh(struct mlxsw_sp *mlxsw_sp, 3790 struct mlxsw_sp_nexthop_group *nh_grp) 3791 { 3792 struct mlxsw_sp_fib6_entry *fib6_entry; 3793 3794 /* Unfortunately, in IPv6 the route and the nexthop are described by 3795 * the same struct, so we need to iterate over all the routes using the 3796 * nexthop group and set / clear the offload indication for them. 3797 */ 3798 list_for_each_entry(fib6_entry, &nh_grp->fib_list, 3799 common.nexthop_group_node) 3800 __mlxsw_sp_nexthop6_group_offload_refresh(nh_grp, fib6_entry); 3801 } 3802 3803 static void 3804 mlxsw_sp_nexthop_bucket_offload_refresh(struct mlxsw_sp *mlxsw_sp, 3805 const struct mlxsw_sp_nexthop *nh, 3806 u16 bucket_index) 3807 { 3808 struct mlxsw_sp_nexthop_group *nh_grp = nh->nhgi->nh_grp; 3809 bool offload = false, trap = false; 3810 3811 if (nh->offloaded) { 3812 if (nh->action == MLXSW_SP_NEXTHOP_ACTION_TRAP) 3813 trap = true; 3814 else 3815 offload = true; 3816 } 3817 nexthop_bucket_set_hw_flags(mlxsw_sp_net(mlxsw_sp), nh_grp->obj.id, 3818 bucket_index, offload, trap); 3819 } 3820 3821 static void 3822 mlxsw_sp_nexthop_obj_group_offload_refresh(struct mlxsw_sp *mlxsw_sp, 3823 struct mlxsw_sp_nexthop_group *nh_grp) 3824 { 3825 int i; 3826 3827 /* Do not update the flags if the nexthop group is being destroyed 3828 * since: 3829 * 1. The nexthop objects is being deleted, in which case the flags are 3830 * irrelevant. 3831 * 2. The nexthop group was replaced by a newer group, in which case 3832 * the flags of the nexthop object were already updated based on the 3833 * new group. 3834 */ 3835 if (nh_grp->can_destroy) 3836 return; 3837 3838 nexthop_set_hw_flags(mlxsw_sp_net(mlxsw_sp), nh_grp->obj.id, 3839 nh_grp->nhgi->adj_index_valid, false); 3840 3841 /* Update flags of individual nexthop buckets in case of a resilient 3842 * nexthop group. 3843 */ 3844 if (!nh_grp->nhgi->is_resilient) 3845 return; 3846 3847 for (i = 0; i < nh_grp->nhgi->count; i++) { 3848 struct mlxsw_sp_nexthop *nh = &nh_grp->nhgi->nexthops[i]; 3849 3850 mlxsw_sp_nexthop_bucket_offload_refresh(mlxsw_sp, nh, i); 3851 } 3852 } 3853 3854 static void 3855 mlxsw_sp_nexthop_group_offload_refresh(struct mlxsw_sp *mlxsw_sp, 3856 struct mlxsw_sp_nexthop_group *nh_grp) 3857 { 3858 switch (nh_grp->type) { 3859 case MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV4: 3860 mlxsw_sp_nexthop4_group_offload_refresh(mlxsw_sp, nh_grp); 3861 break; 3862 case MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV6: 3863 mlxsw_sp_nexthop6_group_offload_refresh(mlxsw_sp, nh_grp); 3864 break; 3865 case MLXSW_SP_NEXTHOP_GROUP_TYPE_OBJ: 3866 mlxsw_sp_nexthop_obj_group_offload_refresh(mlxsw_sp, nh_grp); 3867 break; 3868 } 3869 } 3870 3871 static int 3872 mlxsw_sp_nexthop_group_refresh(struct mlxsw_sp *mlxsw_sp, 3873 struct mlxsw_sp_nexthop_group *nh_grp) 3874 { 3875 struct mlxsw_sp_nexthop_group_info *nhgi = nh_grp->nhgi; 3876 u16 ecmp_size, old_ecmp_size; 3877 struct mlxsw_sp_nexthop *nh; 3878 bool offload_change = false; 3879 u32 adj_index; 3880 bool old_adj_index_valid; 3881 u32 old_adj_index; 3882 int i, err2, err; 3883 3884 if (!nhgi->gateway) 3885 return mlxsw_sp_nexthop_fib_entries_update(mlxsw_sp, nh_grp); 3886 3887 for (i = 0; i < nhgi->count; i++) { 3888 nh = &nhgi->nexthops[i]; 3889 3890 if (nh->should_offload != nh->offloaded) { 3891 offload_change = true; 3892 if (nh->should_offload) 3893 nh->update = 1; 3894 } 3895 } 3896 if (!offload_change) { 3897 /* Nothing was added or removed, so no need to reallocate. Just 3898 * update MAC on existing adjacency indexes. 3899 */ 3900 err = mlxsw_sp_nexthop_group_update(mlxsw_sp, nhgi, false); 3901 if (err) { 3902 dev_warn(mlxsw_sp->bus_info->dev, "Failed to update neigh MAC in adjacency table.\n"); 3903 goto set_trap; 3904 } 3905 /* Flags of individual nexthop buckets might need to be 3906 * updated. 3907 */ 3908 mlxsw_sp_nexthop_group_offload_refresh(mlxsw_sp, nh_grp); 3909 return 0; 3910 } 3911 mlxsw_sp_nexthop_group_normalize(nhgi); 3912 if (!nhgi->sum_norm_weight) { 3913 /* No neigh of this group is connected so we just set 3914 * the trap and let everthing flow through kernel. 3915 */ 3916 err = 0; 3917 goto set_trap; 3918 } 3919 3920 ecmp_size = nhgi->sum_norm_weight; 3921 err = mlxsw_sp_fix_adj_grp_size(mlxsw_sp, &ecmp_size); 3922 if (err) 3923 /* No valid allocation size available. */ 3924 goto set_trap; 3925 3926 err = mlxsw_sp_kvdl_alloc(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ, 3927 ecmp_size, &adj_index); 3928 if (err) { 3929 /* We ran out of KVD linear space, just set the 3930 * trap and let everything flow through kernel. 3931 */ 3932 dev_warn(mlxsw_sp->bus_info->dev, "Failed to allocate KVD linear area for nexthop group.\n"); 3933 goto set_trap; 3934 } 3935 old_adj_index_valid = nhgi->adj_index_valid; 3936 old_adj_index = nhgi->adj_index; 3937 old_ecmp_size = nhgi->ecmp_size; 3938 nhgi->adj_index_valid = 1; 3939 nhgi->adj_index = adj_index; 3940 nhgi->ecmp_size = ecmp_size; 3941 mlxsw_sp_nexthop_group_rebalance(nhgi); 3942 err = mlxsw_sp_nexthop_group_update(mlxsw_sp, nhgi, true); 3943 if (err) { 3944 dev_warn(mlxsw_sp->bus_info->dev, "Failed to update neigh MAC in adjacency table.\n"); 3945 goto set_trap; 3946 } 3947 3948 mlxsw_sp_nexthop_group_offload_refresh(mlxsw_sp, nh_grp); 3949 3950 if (!old_adj_index_valid) { 3951 /* The trap was set for fib entries, so we have to call 3952 * fib entry update to unset it and use adjacency index. 3953 */ 3954 err = mlxsw_sp_nexthop_fib_entries_update(mlxsw_sp, nh_grp); 3955 if (err) { 3956 dev_warn(mlxsw_sp->bus_info->dev, "Failed to add adjacency index to fib entries.\n"); 3957 goto set_trap; 3958 } 3959 return 0; 3960 } 3961 3962 err = mlxsw_sp_adj_index_mass_update(mlxsw_sp, nh_grp, 3963 old_adj_index, old_ecmp_size); 3964 mlxsw_sp_kvdl_free(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ, 3965 old_ecmp_size, old_adj_index); 3966 if (err) { 3967 dev_warn(mlxsw_sp->bus_info->dev, "Failed to mass-update adjacency index for nexthop group.\n"); 3968 goto set_trap; 3969 } 3970 3971 return 0; 3972 3973 set_trap: 3974 old_adj_index_valid = nhgi->adj_index_valid; 3975 nhgi->adj_index_valid = 0; 3976 for (i = 0; i < nhgi->count; i++) { 3977 nh = &nhgi->nexthops[i]; 3978 nh->offloaded = 0; 3979 } 3980 err2 = mlxsw_sp_nexthop_fib_entries_update(mlxsw_sp, nh_grp); 3981 if (err2) 3982 dev_warn(mlxsw_sp->bus_info->dev, "Failed to set traps for fib entries.\n"); 3983 mlxsw_sp_nexthop_group_offload_refresh(mlxsw_sp, nh_grp); 3984 if (old_adj_index_valid) 3985 mlxsw_sp_kvdl_free(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ, 3986 nhgi->ecmp_size, nhgi->adj_index); 3987 return err; 3988 } 3989 3990 static void __mlxsw_sp_nexthop_neigh_update(struct mlxsw_sp_nexthop *nh, 3991 bool removing) 3992 { 3993 if (!removing) { 3994 nh->action = MLXSW_SP_NEXTHOP_ACTION_FORWARD; 3995 nh->should_offload = 1; 3996 } else if (nh->nhgi->is_resilient) { 3997 nh->action = MLXSW_SP_NEXTHOP_ACTION_TRAP; 3998 nh->should_offload = 1; 3999 } else { 4000 nh->should_offload = 0; 4001 } 4002 nh->update = 1; 4003 } 4004 4005 static int 4006 mlxsw_sp_nexthop_dead_neigh_replace(struct mlxsw_sp *mlxsw_sp, 4007 struct mlxsw_sp_neigh_entry *neigh_entry) 4008 { 4009 struct neighbour *n, *old_n = neigh_entry->key.n; 4010 struct mlxsw_sp_nexthop *nh; 4011 bool entry_connected; 4012 u8 nud_state, dead; 4013 int err; 4014 4015 nh = list_first_entry(&neigh_entry->nexthop_list, 4016 struct mlxsw_sp_nexthop, neigh_list_node); 4017 4018 n = neigh_lookup(nh->neigh_tbl, &nh->gw_addr, nh->rif->dev); 4019 if (!n) { 4020 n = neigh_create(nh->neigh_tbl, &nh->gw_addr, nh->rif->dev); 4021 if (IS_ERR(n)) 4022 return PTR_ERR(n); 4023 neigh_event_send(n, NULL); 4024 } 4025 4026 mlxsw_sp_neigh_entry_remove(mlxsw_sp, neigh_entry); 4027 neigh_entry->key.n = n; 4028 err = mlxsw_sp_neigh_entry_insert(mlxsw_sp, neigh_entry); 4029 if (err) 4030 goto err_neigh_entry_insert; 4031 4032 read_lock_bh(&n->lock); 4033 nud_state = n->nud_state; 4034 dead = n->dead; 4035 read_unlock_bh(&n->lock); 4036 entry_connected = nud_state & NUD_VALID && !dead; 4037 4038 list_for_each_entry(nh, &neigh_entry->nexthop_list, 4039 neigh_list_node) { 4040 neigh_release(old_n); 4041 neigh_clone(n); 4042 __mlxsw_sp_nexthop_neigh_update(nh, !entry_connected); 4043 mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh->nhgi->nh_grp); 4044 } 4045 4046 neigh_release(n); 4047 4048 return 0; 4049 4050 err_neigh_entry_insert: 4051 neigh_entry->key.n = old_n; 4052 mlxsw_sp_neigh_entry_insert(mlxsw_sp, neigh_entry); 4053 neigh_release(n); 4054 return err; 4055 } 4056 4057 static void 4058 mlxsw_sp_nexthop_neigh_update(struct mlxsw_sp *mlxsw_sp, 4059 struct mlxsw_sp_neigh_entry *neigh_entry, 4060 bool removing, bool dead) 4061 { 4062 struct mlxsw_sp_nexthop *nh; 4063 4064 if (list_empty(&neigh_entry->nexthop_list)) 4065 return; 4066 4067 if (dead) { 4068 int err; 4069 4070 err = mlxsw_sp_nexthop_dead_neigh_replace(mlxsw_sp, 4071 neigh_entry); 4072 if (err) 4073 dev_err(mlxsw_sp->bus_info->dev, "Failed to replace dead neigh\n"); 4074 return; 4075 } 4076 4077 list_for_each_entry(nh, &neigh_entry->nexthop_list, 4078 neigh_list_node) { 4079 __mlxsw_sp_nexthop_neigh_update(nh, removing); 4080 mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh->nhgi->nh_grp); 4081 } 4082 } 4083 4084 static void mlxsw_sp_nexthop_rif_init(struct mlxsw_sp_nexthop *nh, 4085 struct mlxsw_sp_rif *rif) 4086 { 4087 if (nh->rif) 4088 return; 4089 4090 nh->rif = rif; 4091 list_add(&nh->rif_list_node, &rif->nexthop_list); 4092 } 4093 4094 static void mlxsw_sp_nexthop_rif_fini(struct mlxsw_sp_nexthop *nh) 4095 { 4096 if (!nh->rif) 4097 return; 4098 4099 list_del(&nh->rif_list_node); 4100 nh->rif = NULL; 4101 } 4102 4103 static int mlxsw_sp_nexthop_neigh_init(struct mlxsw_sp *mlxsw_sp, 4104 struct mlxsw_sp_nexthop *nh) 4105 { 4106 struct mlxsw_sp_neigh_entry *neigh_entry; 4107 struct neighbour *n; 4108 u8 nud_state, dead; 4109 int err; 4110 4111 if (!nh->nhgi->gateway || nh->neigh_entry) 4112 return 0; 4113 4114 /* Take a reference of neigh here ensuring that neigh would 4115 * not be destructed before the nexthop entry is finished. 4116 * The reference is taken either in neigh_lookup() or 4117 * in neigh_create() in case n is not found. 4118 */ 4119 n = neigh_lookup(nh->neigh_tbl, &nh->gw_addr, nh->rif->dev); 4120 if (!n) { 4121 n = neigh_create(nh->neigh_tbl, &nh->gw_addr, nh->rif->dev); 4122 if (IS_ERR(n)) 4123 return PTR_ERR(n); 4124 neigh_event_send(n, NULL); 4125 } 4126 neigh_entry = mlxsw_sp_neigh_entry_lookup(mlxsw_sp, n); 4127 if (!neigh_entry) { 4128 neigh_entry = mlxsw_sp_neigh_entry_create(mlxsw_sp, n); 4129 if (IS_ERR(neigh_entry)) { 4130 err = -EINVAL; 4131 goto err_neigh_entry_create; 4132 } 4133 } 4134 4135 /* If that is the first nexthop connected to that neigh, add to 4136 * nexthop_neighs_list 4137 */ 4138 if (list_empty(&neigh_entry->nexthop_list)) 4139 list_add_tail(&neigh_entry->nexthop_neighs_list_node, 4140 &mlxsw_sp->router->nexthop_neighs_list); 4141 4142 nh->neigh_entry = neigh_entry; 4143 list_add_tail(&nh->neigh_list_node, &neigh_entry->nexthop_list); 4144 read_lock_bh(&n->lock); 4145 nud_state = n->nud_state; 4146 dead = n->dead; 4147 read_unlock_bh(&n->lock); 4148 __mlxsw_sp_nexthop_neigh_update(nh, !(nud_state & NUD_VALID && !dead)); 4149 4150 return 0; 4151 4152 err_neigh_entry_create: 4153 neigh_release(n); 4154 return err; 4155 } 4156 4157 static void mlxsw_sp_nexthop_neigh_fini(struct mlxsw_sp *mlxsw_sp, 4158 struct mlxsw_sp_nexthop *nh) 4159 { 4160 struct mlxsw_sp_neigh_entry *neigh_entry = nh->neigh_entry; 4161 struct neighbour *n; 4162 4163 if (!neigh_entry) 4164 return; 4165 n = neigh_entry->key.n; 4166 4167 __mlxsw_sp_nexthop_neigh_update(nh, true); 4168 list_del(&nh->neigh_list_node); 4169 nh->neigh_entry = NULL; 4170 4171 /* If that is the last nexthop connected to that neigh, remove from 4172 * nexthop_neighs_list 4173 */ 4174 if (list_empty(&neigh_entry->nexthop_list)) 4175 list_del(&neigh_entry->nexthop_neighs_list_node); 4176 4177 if (!neigh_entry->connected && list_empty(&neigh_entry->nexthop_list)) 4178 mlxsw_sp_neigh_entry_destroy(mlxsw_sp, neigh_entry); 4179 4180 neigh_release(n); 4181 } 4182 4183 static bool mlxsw_sp_ipip_netdev_ul_up(struct net_device *ol_dev) 4184 { 4185 struct net_device *ul_dev; 4186 bool is_up; 4187 4188 rcu_read_lock(); 4189 ul_dev = mlxsw_sp_ipip_netdev_ul_dev_get(ol_dev); 4190 is_up = ul_dev ? (ul_dev->flags & IFF_UP) : true; 4191 rcu_read_unlock(); 4192 4193 return is_up; 4194 } 4195 4196 static void mlxsw_sp_nexthop_ipip_init(struct mlxsw_sp *mlxsw_sp, 4197 struct mlxsw_sp_nexthop *nh, 4198 struct mlxsw_sp_ipip_entry *ipip_entry) 4199 { 4200 bool removing; 4201 4202 if (!nh->nhgi->gateway || nh->ipip_entry) 4203 return; 4204 4205 nh->ipip_entry = ipip_entry; 4206 removing = !mlxsw_sp_ipip_netdev_ul_up(ipip_entry->ol_dev); 4207 __mlxsw_sp_nexthop_neigh_update(nh, removing); 4208 mlxsw_sp_nexthop_rif_init(nh, &ipip_entry->ol_lb->common); 4209 } 4210 4211 static void mlxsw_sp_nexthop_ipip_fini(struct mlxsw_sp *mlxsw_sp, 4212 struct mlxsw_sp_nexthop *nh) 4213 { 4214 struct mlxsw_sp_ipip_entry *ipip_entry = nh->ipip_entry; 4215 4216 if (!ipip_entry) 4217 return; 4218 4219 __mlxsw_sp_nexthop_neigh_update(nh, true); 4220 nh->ipip_entry = NULL; 4221 } 4222 4223 static bool mlxsw_sp_nexthop4_ipip_type(const struct mlxsw_sp *mlxsw_sp, 4224 const struct fib_nh *fib_nh, 4225 enum mlxsw_sp_ipip_type *p_ipipt) 4226 { 4227 struct net_device *dev = fib_nh->fib_nh_dev; 4228 4229 return dev && 4230 fib_nh->nh_parent->fib_type == RTN_UNICAST && 4231 mlxsw_sp_netdev_ipip_type(mlxsw_sp, dev, p_ipipt); 4232 } 4233 4234 static int mlxsw_sp_nexthop_type_init(struct mlxsw_sp *mlxsw_sp, 4235 struct mlxsw_sp_nexthop *nh, 4236 const struct net_device *dev) 4237 { 4238 const struct mlxsw_sp_ipip_ops *ipip_ops; 4239 struct mlxsw_sp_ipip_entry *ipip_entry; 4240 struct mlxsw_sp_rif *rif; 4241 int err; 4242 4243 ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, dev); 4244 if (ipip_entry) { 4245 ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt]; 4246 if (ipip_ops->can_offload(mlxsw_sp, dev)) { 4247 nh->type = MLXSW_SP_NEXTHOP_TYPE_IPIP; 4248 mlxsw_sp_nexthop_ipip_init(mlxsw_sp, nh, ipip_entry); 4249 return 0; 4250 } 4251 } 4252 4253 nh->type = MLXSW_SP_NEXTHOP_TYPE_ETH; 4254 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); 4255 if (!rif) 4256 return 0; 4257 4258 mlxsw_sp_nexthop_rif_init(nh, rif); 4259 err = mlxsw_sp_nexthop_neigh_init(mlxsw_sp, nh); 4260 if (err) 4261 goto err_neigh_init; 4262 4263 return 0; 4264 4265 err_neigh_init: 4266 mlxsw_sp_nexthop_rif_fini(nh); 4267 return err; 4268 } 4269 4270 static void mlxsw_sp_nexthop_type_fini(struct mlxsw_sp *mlxsw_sp, 4271 struct mlxsw_sp_nexthop *nh) 4272 { 4273 switch (nh->type) { 4274 case MLXSW_SP_NEXTHOP_TYPE_ETH: 4275 mlxsw_sp_nexthop_neigh_fini(mlxsw_sp, nh); 4276 mlxsw_sp_nexthop_rif_fini(nh); 4277 break; 4278 case MLXSW_SP_NEXTHOP_TYPE_IPIP: 4279 mlxsw_sp_nexthop_rif_fini(nh); 4280 mlxsw_sp_nexthop_ipip_fini(mlxsw_sp, nh); 4281 break; 4282 } 4283 } 4284 4285 static int mlxsw_sp_nexthop4_init(struct mlxsw_sp *mlxsw_sp, 4286 struct mlxsw_sp_nexthop_group *nh_grp, 4287 struct mlxsw_sp_nexthop *nh, 4288 struct fib_nh *fib_nh) 4289 { 4290 struct net_device *dev = fib_nh->fib_nh_dev; 4291 struct in_device *in_dev; 4292 int err; 4293 4294 nh->nhgi = nh_grp->nhgi; 4295 nh->key.fib_nh = fib_nh; 4296 #ifdef CONFIG_IP_ROUTE_MULTIPATH 4297 nh->nh_weight = fib_nh->fib_nh_weight; 4298 #else 4299 nh->nh_weight = 1; 4300 #endif 4301 memcpy(&nh->gw_addr, &fib_nh->fib_nh_gw4, sizeof(fib_nh->fib_nh_gw4)); 4302 nh->neigh_tbl = &arp_tbl; 4303 err = mlxsw_sp_nexthop_insert(mlxsw_sp, nh); 4304 if (err) 4305 return err; 4306 4307 mlxsw_sp_nexthop_counter_alloc(mlxsw_sp, nh); 4308 list_add_tail(&nh->router_list_node, &mlxsw_sp->router->nexthop_list); 4309 4310 if (!dev) 4311 return 0; 4312 nh->ifindex = dev->ifindex; 4313 4314 rcu_read_lock(); 4315 in_dev = __in_dev_get_rcu(dev); 4316 if (in_dev && IN_DEV_IGNORE_ROUTES_WITH_LINKDOWN(in_dev) && 4317 fib_nh->fib_nh_flags & RTNH_F_LINKDOWN) { 4318 rcu_read_unlock(); 4319 return 0; 4320 } 4321 rcu_read_unlock(); 4322 4323 err = mlxsw_sp_nexthop_type_init(mlxsw_sp, nh, dev); 4324 if (err) 4325 goto err_nexthop_neigh_init; 4326 4327 return 0; 4328 4329 err_nexthop_neigh_init: 4330 list_del(&nh->router_list_node); 4331 mlxsw_sp_nexthop_counter_free(mlxsw_sp, nh); 4332 mlxsw_sp_nexthop_remove(mlxsw_sp, nh); 4333 return err; 4334 } 4335 4336 static void mlxsw_sp_nexthop4_fini(struct mlxsw_sp *mlxsw_sp, 4337 struct mlxsw_sp_nexthop *nh) 4338 { 4339 mlxsw_sp_nexthop_type_fini(mlxsw_sp, nh); 4340 list_del(&nh->router_list_node); 4341 mlxsw_sp_nexthop_counter_free(mlxsw_sp, nh); 4342 mlxsw_sp_nexthop_remove(mlxsw_sp, nh); 4343 } 4344 4345 static void mlxsw_sp_nexthop4_event(struct mlxsw_sp *mlxsw_sp, 4346 unsigned long event, struct fib_nh *fib_nh) 4347 { 4348 struct mlxsw_sp_nexthop_key key; 4349 struct mlxsw_sp_nexthop *nh; 4350 4351 key.fib_nh = fib_nh; 4352 nh = mlxsw_sp_nexthop_lookup(mlxsw_sp, key); 4353 if (!nh) 4354 return; 4355 4356 switch (event) { 4357 case FIB_EVENT_NH_ADD: 4358 mlxsw_sp_nexthop_type_init(mlxsw_sp, nh, fib_nh->fib_nh_dev); 4359 break; 4360 case FIB_EVENT_NH_DEL: 4361 mlxsw_sp_nexthop_type_fini(mlxsw_sp, nh); 4362 break; 4363 } 4364 4365 mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh->nhgi->nh_grp); 4366 } 4367 4368 static void mlxsw_sp_nexthop_rif_update(struct mlxsw_sp *mlxsw_sp, 4369 struct mlxsw_sp_rif *rif) 4370 { 4371 struct mlxsw_sp_nexthop *nh; 4372 bool removing; 4373 4374 list_for_each_entry(nh, &rif->nexthop_list, rif_list_node) { 4375 switch (nh->type) { 4376 case MLXSW_SP_NEXTHOP_TYPE_ETH: 4377 removing = false; 4378 break; 4379 case MLXSW_SP_NEXTHOP_TYPE_IPIP: 4380 removing = !mlxsw_sp_ipip_netdev_ul_up(rif->dev); 4381 break; 4382 default: 4383 WARN_ON(1); 4384 continue; 4385 } 4386 4387 __mlxsw_sp_nexthop_neigh_update(nh, removing); 4388 mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh->nhgi->nh_grp); 4389 } 4390 } 4391 4392 static void mlxsw_sp_nexthop_rif_migrate(struct mlxsw_sp *mlxsw_sp, 4393 struct mlxsw_sp_rif *old_rif, 4394 struct mlxsw_sp_rif *new_rif) 4395 { 4396 struct mlxsw_sp_nexthop *nh; 4397 4398 list_splice_init(&old_rif->nexthop_list, &new_rif->nexthop_list); 4399 list_for_each_entry(nh, &new_rif->nexthop_list, rif_list_node) 4400 nh->rif = new_rif; 4401 mlxsw_sp_nexthop_rif_update(mlxsw_sp, new_rif); 4402 } 4403 4404 static void mlxsw_sp_nexthop_rif_gone_sync(struct mlxsw_sp *mlxsw_sp, 4405 struct mlxsw_sp_rif *rif) 4406 { 4407 struct mlxsw_sp_nexthop *nh, *tmp; 4408 4409 list_for_each_entry_safe(nh, tmp, &rif->nexthop_list, rif_list_node) { 4410 mlxsw_sp_nexthop_type_fini(mlxsw_sp, nh); 4411 mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh->nhgi->nh_grp); 4412 } 4413 } 4414 4415 static int mlxsw_sp_adj_trap_entry_init(struct mlxsw_sp *mlxsw_sp) 4416 { 4417 enum mlxsw_reg_ratr_trap_action trap_action; 4418 char ratr_pl[MLXSW_REG_RATR_LEN]; 4419 int err; 4420 4421 err = mlxsw_sp_kvdl_alloc(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ, 1, 4422 &mlxsw_sp->router->adj_trap_index); 4423 if (err) 4424 return err; 4425 4426 trap_action = MLXSW_REG_RATR_TRAP_ACTION_TRAP; 4427 mlxsw_reg_ratr_pack(ratr_pl, MLXSW_REG_RATR_OP_WRITE_WRITE_ENTRY, true, 4428 MLXSW_REG_RATR_TYPE_ETHERNET, 4429 mlxsw_sp->router->adj_trap_index, 4430 mlxsw_sp->router->lb_rif_index); 4431 mlxsw_reg_ratr_trap_action_set(ratr_pl, trap_action); 4432 mlxsw_reg_ratr_trap_id_set(ratr_pl, MLXSW_TRAP_ID_RTR_EGRESS0); 4433 err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ratr), ratr_pl); 4434 if (err) 4435 goto err_ratr_write; 4436 4437 return 0; 4438 4439 err_ratr_write: 4440 mlxsw_sp_kvdl_free(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ, 1, 4441 mlxsw_sp->router->adj_trap_index); 4442 return err; 4443 } 4444 4445 static void mlxsw_sp_adj_trap_entry_fini(struct mlxsw_sp *mlxsw_sp) 4446 { 4447 mlxsw_sp_kvdl_free(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_ADJ, 1, 4448 mlxsw_sp->router->adj_trap_index); 4449 } 4450 4451 static int mlxsw_sp_nexthop_group_inc(struct mlxsw_sp *mlxsw_sp) 4452 { 4453 int err; 4454 4455 if (refcount_inc_not_zero(&mlxsw_sp->router->num_groups)) 4456 return 0; 4457 4458 err = mlxsw_sp_adj_trap_entry_init(mlxsw_sp); 4459 if (err) 4460 return err; 4461 4462 refcount_set(&mlxsw_sp->router->num_groups, 1); 4463 4464 return 0; 4465 } 4466 4467 static void mlxsw_sp_nexthop_group_dec(struct mlxsw_sp *mlxsw_sp) 4468 { 4469 if (!refcount_dec_and_test(&mlxsw_sp->router->num_groups)) 4470 return; 4471 4472 mlxsw_sp_adj_trap_entry_fini(mlxsw_sp); 4473 } 4474 4475 static void 4476 mlxsw_sp_nh_grp_activity_get(struct mlxsw_sp *mlxsw_sp, 4477 const struct mlxsw_sp_nexthop_group *nh_grp, 4478 unsigned long *activity) 4479 { 4480 char *ratrad_pl; 4481 int i, err; 4482 4483 ratrad_pl = kmalloc(MLXSW_REG_RATRAD_LEN, GFP_KERNEL); 4484 if (!ratrad_pl) 4485 return; 4486 4487 mlxsw_reg_ratrad_pack(ratrad_pl, nh_grp->nhgi->adj_index, 4488 nh_grp->nhgi->count); 4489 err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ratrad), ratrad_pl); 4490 if (err) 4491 goto out; 4492 4493 for (i = 0; i < nh_grp->nhgi->count; i++) { 4494 if (!mlxsw_reg_ratrad_activity_vector_get(ratrad_pl, i)) 4495 continue; 4496 bitmap_set(activity, i, 1); 4497 } 4498 4499 out: 4500 kfree(ratrad_pl); 4501 } 4502 4503 #define MLXSW_SP_NH_GRP_ACTIVITY_UPDATE_INTERVAL 1000 /* ms */ 4504 4505 static void 4506 mlxsw_sp_nh_grp_activity_update(struct mlxsw_sp *mlxsw_sp, 4507 const struct mlxsw_sp_nexthop_group *nh_grp) 4508 { 4509 unsigned long *activity; 4510 4511 activity = bitmap_zalloc(nh_grp->nhgi->count, GFP_KERNEL); 4512 if (!activity) 4513 return; 4514 4515 mlxsw_sp_nh_grp_activity_get(mlxsw_sp, nh_grp, activity); 4516 nexthop_res_grp_activity_update(mlxsw_sp_net(mlxsw_sp), nh_grp->obj.id, 4517 nh_grp->nhgi->count, activity); 4518 4519 bitmap_free(activity); 4520 } 4521 4522 static void 4523 mlxsw_sp_nh_grp_activity_work_schedule(struct mlxsw_sp *mlxsw_sp) 4524 { 4525 unsigned int interval = MLXSW_SP_NH_GRP_ACTIVITY_UPDATE_INTERVAL; 4526 4527 mlxsw_core_schedule_dw(&mlxsw_sp->router->nh_grp_activity_dw, 4528 msecs_to_jiffies(interval)); 4529 } 4530 4531 static void mlxsw_sp_nh_grp_activity_work(struct work_struct *work) 4532 { 4533 struct mlxsw_sp_nexthop_group_info *nhgi; 4534 struct mlxsw_sp_router *router; 4535 bool reschedule = false; 4536 4537 router = container_of(work, struct mlxsw_sp_router, 4538 nh_grp_activity_dw.work); 4539 4540 mutex_lock(&router->lock); 4541 4542 list_for_each_entry(nhgi, &router->nh_res_grp_list, list) { 4543 mlxsw_sp_nh_grp_activity_update(router->mlxsw_sp, nhgi->nh_grp); 4544 reschedule = true; 4545 } 4546 4547 mutex_unlock(&router->lock); 4548 4549 if (!reschedule) 4550 return; 4551 mlxsw_sp_nh_grp_activity_work_schedule(router->mlxsw_sp); 4552 } 4553 4554 static int 4555 mlxsw_sp_nexthop_obj_single_validate(struct mlxsw_sp *mlxsw_sp, 4556 const struct nh_notifier_single_info *nh, 4557 struct netlink_ext_ack *extack) 4558 { 4559 int err = -EINVAL; 4560 4561 if (nh->is_fdb) 4562 NL_SET_ERR_MSG_MOD(extack, "FDB nexthops are not supported"); 4563 else if (nh->has_encap) 4564 NL_SET_ERR_MSG_MOD(extack, "Encapsulating nexthops are not supported"); 4565 else 4566 err = 0; 4567 4568 return err; 4569 } 4570 4571 static int 4572 mlxsw_sp_nexthop_obj_group_entry_validate(struct mlxsw_sp *mlxsw_sp, 4573 const struct nh_notifier_single_info *nh, 4574 struct netlink_ext_ack *extack) 4575 { 4576 int err; 4577 4578 err = mlxsw_sp_nexthop_obj_single_validate(mlxsw_sp, nh, extack); 4579 if (err) 4580 return err; 4581 4582 /* Device only nexthops with an IPIP device are programmed as 4583 * encapsulating adjacency entries. 4584 */ 4585 if (!nh->gw_family && !nh->is_reject && 4586 !mlxsw_sp_netdev_ipip_type(mlxsw_sp, nh->dev, NULL)) { 4587 NL_SET_ERR_MSG_MOD(extack, "Nexthop group entry does not have a gateway"); 4588 return -EINVAL; 4589 } 4590 4591 return 0; 4592 } 4593 4594 static int 4595 mlxsw_sp_nexthop_obj_group_validate(struct mlxsw_sp *mlxsw_sp, 4596 const struct nh_notifier_grp_info *nh_grp, 4597 struct netlink_ext_ack *extack) 4598 { 4599 int i; 4600 4601 if (nh_grp->is_fdb) { 4602 NL_SET_ERR_MSG_MOD(extack, "FDB nexthop groups are not supported"); 4603 return -EINVAL; 4604 } 4605 4606 for (i = 0; i < nh_grp->num_nh; i++) { 4607 const struct nh_notifier_single_info *nh; 4608 int err; 4609 4610 nh = &nh_grp->nh_entries[i].nh; 4611 err = mlxsw_sp_nexthop_obj_group_entry_validate(mlxsw_sp, nh, 4612 extack); 4613 if (err) 4614 return err; 4615 } 4616 4617 return 0; 4618 } 4619 4620 static int 4621 mlxsw_sp_nexthop_obj_res_group_size_validate(struct mlxsw_sp *mlxsw_sp, 4622 const struct nh_notifier_res_table_info *nh_res_table, 4623 struct netlink_ext_ack *extack) 4624 { 4625 unsigned int alloc_size; 4626 bool valid_size = false; 4627 int err, i; 4628 4629 if (nh_res_table->num_nh_buckets < 32) { 4630 NL_SET_ERR_MSG_MOD(extack, "Minimum number of buckets is 32"); 4631 return -EINVAL; 4632 } 4633 4634 for (i = 0; i < mlxsw_sp->router->adj_grp_size_ranges_count; i++) { 4635 const struct mlxsw_sp_adj_grp_size_range *size_range; 4636 4637 size_range = &mlxsw_sp->router->adj_grp_size_ranges[i]; 4638 4639 if (nh_res_table->num_nh_buckets >= size_range->start && 4640 nh_res_table->num_nh_buckets <= size_range->end) { 4641 valid_size = true; 4642 break; 4643 } 4644 } 4645 4646 if (!valid_size) { 4647 NL_SET_ERR_MSG_MOD(extack, "Invalid number of buckets"); 4648 return -EINVAL; 4649 } 4650 4651 err = mlxsw_sp_kvdl_alloc_count_query(mlxsw_sp, 4652 MLXSW_SP_KVDL_ENTRY_TYPE_ADJ, 4653 nh_res_table->num_nh_buckets, 4654 &alloc_size); 4655 if (err || nh_res_table->num_nh_buckets != alloc_size) { 4656 NL_SET_ERR_MSG_MOD(extack, "Number of buckets does not fit allocation size of any KVDL partition"); 4657 return -EINVAL; 4658 } 4659 4660 return 0; 4661 } 4662 4663 static int 4664 mlxsw_sp_nexthop_obj_res_group_validate(struct mlxsw_sp *mlxsw_sp, 4665 const struct nh_notifier_res_table_info *nh_res_table, 4666 struct netlink_ext_ack *extack) 4667 { 4668 int err; 4669 u16 i; 4670 4671 err = mlxsw_sp_nexthop_obj_res_group_size_validate(mlxsw_sp, 4672 nh_res_table, 4673 extack); 4674 if (err) 4675 return err; 4676 4677 for (i = 0; i < nh_res_table->num_nh_buckets; i++) { 4678 const struct nh_notifier_single_info *nh; 4679 int err; 4680 4681 nh = &nh_res_table->nhs[i]; 4682 err = mlxsw_sp_nexthop_obj_group_entry_validate(mlxsw_sp, nh, 4683 extack); 4684 if (err) 4685 return err; 4686 } 4687 4688 return 0; 4689 } 4690 4691 static int mlxsw_sp_nexthop_obj_validate(struct mlxsw_sp *mlxsw_sp, 4692 unsigned long event, 4693 struct nh_notifier_info *info) 4694 { 4695 struct nh_notifier_single_info *nh; 4696 4697 if (event != NEXTHOP_EVENT_REPLACE && 4698 event != NEXTHOP_EVENT_RES_TABLE_PRE_REPLACE && 4699 event != NEXTHOP_EVENT_BUCKET_REPLACE) 4700 return 0; 4701 4702 switch (info->type) { 4703 case NH_NOTIFIER_INFO_TYPE_SINGLE: 4704 return mlxsw_sp_nexthop_obj_single_validate(mlxsw_sp, info->nh, 4705 info->extack); 4706 case NH_NOTIFIER_INFO_TYPE_GRP: 4707 return mlxsw_sp_nexthop_obj_group_validate(mlxsw_sp, 4708 info->nh_grp, 4709 info->extack); 4710 case NH_NOTIFIER_INFO_TYPE_RES_TABLE: 4711 return mlxsw_sp_nexthop_obj_res_group_validate(mlxsw_sp, 4712 info->nh_res_table, 4713 info->extack); 4714 case NH_NOTIFIER_INFO_TYPE_RES_BUCKET: 4715 nh = &info->nh_res_bucket->new_nh; 4716 return mlxsw_sp_nexthop_obj_group_entry_validate(mlxsw_sp, nh, 4717 info->extack); 4718 default: 4719 NL_SET_ERR_MSG_MOD(info->extack, "Unsupported nexthop type"); 4720 return -EOPNOTSUPP; 4721 } 4722 } 4723 4724 static bool mlxsw_sp_nexthop_obj_is_gateway(struct mlxsw_sp *mlxsw_sp, 4725 const struct nh_notifier_info *info) 4726 { 4727 const struct net_device *dev; 4728 4729 switch (info->type) { 4730 case NH_NOTIFIER_INFO_TYPE_SINGLE: 4731 dev = info->nh->dev; 4732 return info->nh->gw_family || info->nh->is_reject || 4733 mlxsw_sp_netdev_ipip_type(mlxsw_sp, dev, NULL); 4734 case NH_NOTIFIER_INFO_TYPE_GRP: 4735 case NH_NOTIFIER_INFO_TYPE_RES_TABLE: 4736 /* Already validated earlier. */ 4737 return true; 4738 default: 4739 return false; 4740 } 4741 } 4742 4743 static void mlxsw_sp_nexthop_obj_blackhole_init(struct mlxsw_sp *mlxsw_sp, 4744 struct mlxsw_sp_nexthop *nh) 4745 { 4746 u16 lb_rif_index = mlxsw_sp->router->lb_rif_index; 4747 4748 nh->action = MLXSW_SP_NEXTHOP_ACTION_DISCARD; 4749 nh->should_offload = 1; 4750 /* While nexthops that discard packets do not forward packets 4751 * via an egress RIF, they still need to be programmed using a 4752 * valid RIF, so use the loopback RIF created during init. 4753 */ 4754 nh->rif = mlxsw_sp->router->rifs[lb_rif_index]; 4755 } 4756 4757 static void mlxsw_sp_nexthop_obj_blackhole_fini(struct mlxsw_sp *mlxsw_sp, 4758 struct mlxsw_sp_nexthop *nh) 4759 { 4760 nh->rif = NULL; 4761 nh->should_offload = 0; 4762 } 4763 4764 static int 4765 mlxsw_sp_nexthop_obj_init(struct mlxsw_sp *mlxsw_sp, 4766 struct mlxsw_sp_nexthop_group *nh_grp, 4767 struct mlxsw_sp_nexthop *nh, 4768 struct nh_notifier_single_info *nh_obj, int weight) 4769 { 4770 struct net_device *dev = nh_obj->dev; 4771 int err; 4772 4773 nh->nhgi = nh_grp->nhgi; 4774 nh->nh_weight = weight; 4775 4776 switch (nh_obj->gw_family) { 4777 case AF_INET: 4778 memcpy(&nh->gw_addr, &nh_obj->ipv4, sizeof(nh_obj->ipv4)); 4779 nh->neigh_tbl = &arp_tbl; 4780 break; 4781 case AF_INET6: 4782 memcpy(&nh->gw_addr, &nh_obj->ipv6, sizeof(nh_obj->ipv6)); 4783 #if IS_ENABLED(CONFIG_IPV6) 4784 nh->neigh_tbl = &nd_tbl; 4785 #endif 4786 break; 4787 } 4788 4789 mlxsw_sp_nexthop_counter_alloc(mlxsw_sp, nh); 4790 list_add_tail(&nh->router_list_node, &mlxsw_sp->router->nexthop_list); 4791 nh->ifindex = dev->ifindex; 4792 4793 err = mlxsw_sp_nexthop_type_init(mlxsw_sp, nh, dev); 4794 if (err) 4795 goto err_type_init; 4796 4797 if (nh_obj->is_reject) 4798 mlxsw_sp_nexthop_obj_blackhole_init(mlxsw_sp, nh); 4799 4800 /* In a resilient nexthop group, all the nexthops must be written to 4801 * the adjacency table. Even if they do not have a valid neighbour or 4802 * RIF. 4803 */ 4804 if (nh_grp->nhgi->is_resilient && !nh->should_offload) { 4805 nh->action = MLXSW_SP_NEXTHOP_ACTION_TRAP; 4806 nh->should_offload = 1; 4807 } 4808 4809 return 0; 4810 4811 err_type_init: 4812 list_del(&nh->router_list_node); 4813 mlxsw_sp_nexthop_counter_free(mlxsw_sp, nh); 4814 return err; 4815 } 4816 4817 static void mlxsw_sp_nexthop_obj_fini(struct mlxsw_sp *mlxsw_sp, 4818 struct mlxsw_sp_nexthop *nh) 4819 { 4820 if (nh->action == MLXSW_SP_NEXTHOP_ACTION_DISCARD) 4821 mlxsw_sp_nexthop_obj_blackhole_fini(mlxsw_sp, nh); 4822 mlxsw_sp_nexthop_type_fini(mlxsw_sp, nh); 4823 list_del(&nh->router_list_node); 4824 mlxsw_sp_nexthop_counter_free(mlxsw_sp, nh); 4825 nh->should_offload = 0; 4826 } 4827 4828 static int 4829 mlxsw_sp_nexthop_obj_group_info_init(struct mlxsw_sp *mlxsw_sp, 4830 struct mlxsw_sp_nexthop_group *nh_grp, 4831 struct nh_notifier_info *info) 4832 { 4833 struct mlxsw_sp_nexthop_group_info *nhgi; 4834 struct mlxsw_sp_nexthop *nh; 4835 bool is_resilient = false; 4836 unsigned int nhs; 4837 int err, i; 4838 4839 switch (info->type) { 4840 case NH_NOTIFIER_INFO_TYPE_SINGLE: 4841 nhs = 1; 4842 break; 4843 case NH_NOTIFIER_INFO_TYPE_GRP: 4844 nhs = info->nh_grp->num_nh; 4845 break; 4846 case NH_NOTIFIER_INFO_TYPE_RES_TABLE: 4847 nhs = info->nh_res_table->num_nh_buckets; 4848 is_resilient = true; 4849 break; 4850 default: 4851 return -EINVAL; 4852 } 4853 4854 nhgi = kzalloc(struct_size(nhgi, nexthops, nhs), GFP_KERNEL); 4855 if (!nhgi) 4856 return -ENOMEM; 4857 nh_grp->nhgi = nhgi; 4858 nhgi->nh_grp = nh_grp; 4859 nhgi->gateway = mlxsw_sp_nexthop_obj_is_gateway(mlxsw_sp, info); 4860 nhgi->is_resilient = is_resilient; 4861 nhgi->count = nhs; 4862 for (i = 0; i < nhgi->count; i++) { 4863 struct nh_notifier_single_info *nh_obj; 4864 int weight; 4865 4866 nh = &nhgi->nexthops[i]; 4867 switch (info->type) { 4868 case NH_NOTIFIER_INFO_TYPE_SINGLE: 4869 nh_obj = info->nh; 4870 weight = 1; 4871 break; 4872 case NH_NOTIFIER_INFO_TYPE_GRP: 4873 nh_obj = &info->nh_grp->nh_entries[i].nh; 4874 weight = info->nh_grp->nh_entries[i].weight; 4875 break; 4876 case NH_NOTIFIER_INFO_TYPE_RES_TABLE: 4877 nh_obj = &info->nh_res_table->nhs[i]; 4878 weight = 1; 4879 break; 4880 default: 4881 err = -EINVAL; 4882 goto err_nexthop_obj_init; 4883 } 4884 err = mlxsw_sp_nexthop_obj_init(mlxsw_sp, nh_grp, nh, nh_obj, 4885 weight); 4886 if (err) 4887 goto err_nexthop_obj_init; 4888 } 4889 err = mlxsw_sp_nexthop_group_inc(mlxsw_sp); 4890 if (err) 4891 goto err_group_inc; 4892 err = mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh_grp); 4893 if (err) { 4894 NL_SET_ERR_MSG_MOD(info->extack, "Failed to write adjacency entries to the device"); 4895 goto err_group_refresh; 4896 } 4897 4898 /* Add resilient nexthop groups to a list so that the activity of their 4899 * nexthop buckets will be periodically queried and cleared. 4900 */ 4901 if (nhgi->is_resilient) { 4902 if (list_empty(&mlxsw_sp->router->nh_res_grp_list)) 4903 mlxsw_sp_nh_grp_activity_work_schedule(mlxsw_sp); 4904 list_add(&nhgi->list, &mlxsw_sp->router->nh_res_grp_list); 4905 } 4906 4907 return 0; 4908 4909 err_group_refresh: 4910 mlxsw_sp_nexthop_group_dec(mlxsw_sp); 4911 err_group_inc: 4912 i = nhgi->count; 4913 err_nexthop_obj_init: 4914 for (i--; i >= 0; i--) { 4915 nh = &nhgi->nexthops[i]; 4916 mlxsw_sp_nexthop_obj_fini(mlxsw_sp, nh); 4917 } 4918 kfree(nhgi); 4919 return err; 4920 } 4921 4922 static void 4923 mlxsw_sp_nexthop_obj_group_info_fini(struct mlxsw_sp *mlxsw_sp, 4924 struct mlxsw_sp_nexthop_group *nh_grp) 4925 { 4926 struct mlxsw_sp_nexthop_group_info *nhgi = nh_grp->nhgi; 4927 struct mlxsw_sp_router *router = mlxsw_sp->router; 4928 int i; 4929 4930 if (nhgi->is_resilient) { 4931 list_del(&nhgi->list); 4932 if (list_empty(&mlxsw_sp->router->nh_res_grp_list)) 4933 cancel_delayed_work(&router->nh_grp_activity_dw); 4934 } 4935 4936 mlxsw_sp_nexthop_group_dec(mlxsw_sp); 4937 for (i = nhgi->count - 1; i >= 0; i--) { 4938 struct mlxsw_sp_nexthop *nh = &nhgi->nexthops[i]; 4939 4940 mlxsw_sp_nexthop_obj_fini(mlxsw_sp, nh); 4941 } 4942 mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh_grp); 4943 WARN_ON_ONCE(nhgi->adj_index_valid); 4944 kfree(nhgi); 4945 } 4946 4947 static struct mlxsw_sp_nexthop_group * 4948 mlxsw_sp_nexthop_obj_group_create(struct mlxsw_sp *mlxsw_sp, 4949 struct nh_notifier_info *info) 4950 { 4951 struct mlxsw_sp_nexthop_group *nh_grp; 4952 int err; 4953 4954 nh_grp = kzalloc(sizeof(*nh_grp), GFP_KERNEL); 4955 if (!nh_grp) 4956 return ERR_PTR(-ENOMEM); 4957 INIT_LIST_HEAD(&nh_grp->vr_list); 4958 err = rhashtable_init(&nh_grp->vr_ht, 4959 &mlxsw_sp_nexthop_group_vr_ht_params); 4960 if (err) 4961 goto err_nexthop_group_vr_ht_init; 4962 INIT_LIST_HEAD(&nh_grp->fib_list); 4963 nh_grp->type = MLXSW_SP_NEXTHOP_GROUP_TYPE_OBJ; 4964 nh_grp->obj.id = info->id; 4965 4966 err = mlxsw_sp_nexthop_obj_group_info_init(mlxsw_sp, nh_grp, info); 4967 if (err) 4968 goto err_nexthop_group_info_init; 4969 4970 nh_grp->can_destroy = false; 4971 4972 return nh_grp; 4973 4974 err_nexthop_group_info_init: 4975 rhashtable_destroy(&nh_grp->vr_ht); 4976 err_nexthop_group_vr_ht_init: 4977 kfree(nh_grp); 4978 return ERR_PTR(err); 4979 } 4980 4981 static void 4982 mlxsw_sp_nexthop_obj_group_destroy(struct mlxsw_sp *mlxsw_sp, 4983 struct mlxsw_sp_nexthop_group *nh_grp) 4984 { 4985 if (!nh_grp->can_destroy) 4986 return; 4987 mlxsw_sp_nexthop_obj_group_info_fini(mlxsw_sp, nh_grp); 4988 WARN_ON_ONCE(!list_empty(&nh_grp->fib_list)); 4989 WARN_ON_ONCE(!list_empty(&nh_grp->vr_list)); 4990 rhashtable_destroy(&nh_grp->vr_ht); 4991 kfree(nh_grp); 4992 } 4993 4994 static struct mlxsw_sp_nexthop_group * 4995 mlxsw_sp_nexthop_obj_group_lookup(struct mlxsw_sp *mlxsw_sp, u32 id) 4996 { 4997 struct mlxsw_sp_nexthop_group_cmp_arg cmp_arg; 4998 4999 cmp_arg.type = MLXSW_SP_NEXTHOP_GROUP_TYPE_OBJ; 5000 cmp_arg.id = id; 5001 return rhashtable_lookup_fast(&mlxsw_sp->router->nexthop_group_ht, 5002 &cmp_arg, 5003 mlxsw_sp_nexthop_group_ht_params); 5004 } 5005 5006 static int mlxsw_sp_nexthop_obj_group_add(struct mlxsw_sp *mlxsw_sp, 5007 struct mlxsw_sp_nexthop_group *nh_grp) 5008 { 5009 return mlxsw_sp_nexthop_group_insert(mlxsw_sp, nh_grp); 5010 } 5011 5012 static int 5013 mlxsw_sp_nexthop_obj_group_replace(struct mlxsw_sp *mlxsw_sp, 5014 struct mlxsw_sp_nexthop_group *nh_grp, 5015 struct mlxsw_sp_nexthop_group *old_nh_grp, 5016 struct netlink_ext_ack *extack) 5017 { 5018 struct mlxsw_sp_nexthop_group_info *old_nhgi = old_nh_grp->nhgi; 5019 struct mlxsw_sp_nexthop_group_info *new_nhgi = nh_grp->nhgi; 5020 int err; 5021 5022 old_nh_grp->nhgi = new_nhgi; 5023 new_nhgi->nh_grp = old_nh_grp; 5024 nh_grp->nhgi = old_nhgi; 5025 old_nhgi->nh_grp = nh_grp; 5026 5027 if (old_nhgi->adj_index_valid && new_nhgi->adj_index_valid) { 5028 /* Both the old adjacency index and the new one are valid. 5029 * Routes are currently using the old one. Tell the device to 5030 * replace the old adjacency index with the new one. 5031 */ 5032 err = mlxsw_sp_adj_index_mass_update(mlxsw_sp, old_nh_grp, 5033 old_nhgi->adj_index, 5034 old_nhgi->ecmp_size); 5035 if (err) { 5036 NL_SET_ERR_MSG_MOD(extack, "Failed to replace old adjacency index with new one"); 5037 goto err_out; 5038 } 5039 } else if (old_nhgi->adj_index_valid && !new_nhgi->adj_index_valid) { 5040 /* The old adjacency index is valid, while the new one is not. 5041 * Iterate over all the routes using the group and change them 5042 * to trap packets to the CPU. 5043 */ 5044 err = mlxsw_sp_nexthop_fib_entries_update(mlxsw_sp, old_nh_grp); 5045 if (err) { 5046 NL_SET_ERR_MSG_MOD(extack, "Failed to update routes to trap packets"); 5047 goto err_out; 5048 } 5049 } else if (!old_nhgi->adj_index_valid && new_nhgi->adj_index_valid) { 5050 /* The old adjacency index is invalid, while the new one is. 5051 * Iterate over all the routes using the group and change them 5052 * to forward packets using the new valid index. 5053 */ 5054 err = mlxsw_sp_nexthop_fib_entries_update(mlxsw_sp, old_nh_grp); 5055 if (err) { 5056 NL_SET_ERR_MSG_MOD(extack, "Failed to update routes to forward packets"); 5057 goto err_out; 5058 } 5059 } 5060 5061 /* Make sure the flags are set / cleared based on the new nexthop group 5062 * information. 5063 */ 5064 mlxsw_sp_nexthop_obj_group_offload_refresh(mlxsw_sp, old_nh_grp); 5065 5066 /* At this point 'nh_grp' is just a shell that is not used by anyone 5067 * and its nexthop group info is the old info that was just replaced 5068 * with the new one. Remove it. 5069 */ 5070 nh_grp->can_destroy = true; 5071 mlxsw_sp_nexthop_obj_group_destroy(mlxsw_sp, nh_grp); 5072 5073 return 0; 5074 5075 err_out: 5076 old_nhgi->nh_grp = old_nh_grp; 5077 nh_grp->nhgi = new_nhgi; 5078 new_nhgi->nh_grp = nh_grp; 5079 old_nh_grp->nhgi = old_nhgi; 5080 return err; 5081 } 5082 5083 static int mlxsw_sp_nexthop_obj_new(struct mlxsw_sp *mlxsw_sp, 5084 struct nh_notifier_info *info) 5085 { 5086 struct mlxsw_sp_nexthop_group *nh_grp, *old_nh_grp; 5087 struct netlink_ext_ack *extack = info->extack; 5088 int err; 5089 5090 nh_grp = mlxsw_sp_nexthop_obj_group_create(mlxsw_sp, info); 5091 if (IS_ERR(nh_grp)) 5092 return PTR_ERR(nh_grp); 5093 5094 old_nh_grp = mlxsw_sp_nexthop_obj_group_lookup(mlxsw_sp, info->id); 5095 if (!old_nh_grp) 5096 err = mlxsw_sp_nexthop_obj_group_add(mlxsw_sp, nh_grp); 5097 else 5098 err = mlxsw_sp_nexthop_obj_group_replace(mlxsw_sp, nh_grp, 5099 old_nh_grp, extack); 5100 5101 if (err) { 5102 nh_grp->can_destroy = true; 5103 mlxsw_sp_nexthop_obj_group_destroy(mlxsw_sp, nh_grp); 5104 } 5105 5106 return err; 5107 } 5108 5109 static void mlxsw_sp_nexthop_obj_del(struct mlxsw_sp *mlxsw_sp, 5110 struct nh_notifier_info *info) 5111 { 5112 struct mlxsw_sp_nexthop_group *nh_grp; 5113 5114 nh_grp = mlxsw_sp_nexthop_obj_group_lookup(mlxsw_sp, info->id); 5115 if (!nh_grp) 5116 return; 5117 5118 nh_grp->can_destroy = true; 5119 mlxsw_sp_nexthop_group_remove(mlxsw_sp, nh_grp); 5120 5121 /* If the group still has routes using it, then defer the delete 5122 * operation until the last route using it is deleted. 5123 */ 5124 if (!list_empty(&nh_grp->fib_list)) 5125 return; 5126 mlxsw_sp_nexthop_obj_group_destroy(mlxsw_sp, nh_grp); 5127 } 5128 5129 static int mlxsw_sp_nexthop_obj_bucket_query(struct mlxsw_sp *mlxsw_sp, 5130 u32 adj_index, char *ratr_pl) 5131 { 5132 MLXSW_REG_ZERO(ratr, ratr_pl); 5133 mlxsw_reg_ratr_op_set(ratr_pl, MLXSW_REG_RATR_OP_QUERY_READ); 5134 mlxsw_reg_ratr_adjacency_index_low_set(ratr_pl, adj_index); 5135 mlxsw_reg_ratr_adjacency_index_high_set(ratr_pl, adj_index >> 16); 5136 5137 return mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ratr), ratr_pl); 5138 } 5139 5140 static int mlxsw_sp_nexthop_obj_bucket_compare(char *ratr_pl, char *ratr_pl_new) 5141 { 5142 /* Clear the opcode and activity on both the old and new payload as 5143 * they are irrelevant for the comparison. 5144 */ 5145 mlxsw_reg_ratr_op_set(ratr_pl, MLXSW_REG_RATR_OP_QUERY_READ); 5146 mlxsw_reg_ratr_a_set(ratr_pl, 0); 5147 mlxsw_reg_ratr_op_set(ratr_pl_new, MLXSW_REG_RATR_OP_QUERY_READ); 5148 mlxsw_reg_ratr_a_set(ratr_pl_new, 0); 5149 5150 /* If the contents of the adjacency entry are consistent with the 5151 * replacement request, then replacement was successful. 5152 */ 5153 if (!memcmp(ratr_pl, ratr_pl_new, MLXSW_REG_RATR_LEN)) 5154 return 0; 5155 5156 return -EINVAL; 5157 } 5158 5159 static int 5160 mlxsw_sp_nexthop_obj_bucket_adj_update(struct mlxsw_sp *mlxsw_sp, 5161 struct mlxsw_sp_nexthop *nh, 5162 struct nh_notifier_info *info) 5163 { 5164 u16 bucket_index = info->nh_res_bucket->bucket_index; 5165 struct netlink_ext_ack *extack = info->extack; 5166 bool force = info->nh_res_bucket->force; 5167 char ratr_pl_new[MLXSW_REG_RATR_LEN]; 5168 char ratr_pl[MLXSW_REG_RATR_LEN]; 5169 u32 adj_index; 5170 int err; 5171 5172 /* No point in trying an atomic replacement if the idle timer interval 5173 * is smaller than the interval in which we query and clear activity. 5174 */ 5175 if (!force && info->nh_res_bucket->idle_timer_ms < 5176 MLXSW_SP_NH_GRP_ACTIVITY_UPDATE_INTERVAL) 5177 force = true; 5178 5179 adj_index = nh->nhgi->adj_index + bucket_index; 5180 err = mlxsw_sp_nexthop_update(mlxsw_sp, adj_index, nh, force, ratr_pl); 5181 if (err) { 5182 NL_SET_ERR_MSG_MOD(extack, "Failed to overwrite nexthop bucket"); 5183 return err; 5184 } 5185 5186 if (!force) { 5187 err = mlxsw_sp_nexthop_obj_bucket_query(mlxsw_sp, adj_index, 5188 ratr_pl_new); 5189 if (err) { 5190 NL_SET_ERR_MSG_MOD(extack, "Failed to query nexthop bucket state after replacement. State might be inconsistent"); 5191 return err; 5192 } 5193 5194 err = mlxsw_sp_nexthop_obj_bucket_compare(ratr_pl, ratr_pl_new); 5195 if (err) { 5196 NL_SET_ERR_MSG_MOD(extack, "Nexthop bucket was not replaced because it was active during replacement"); 5197 return err; 5198 } 5199 } 5200 5201 nh->update = 0; 5202 nh->offloaded = 1; 5203 mlxsw_sp_nexthop_bucket_offload_refresh(mlxsw_sp, nh, bucket_index); 5204 5205 return 0; 5206 } 5207 5208 static int mlxsw_sp_nexthop_obj_bucket_replace(struct mlxsw_sp *mlxsw_sp, 5209 struct nh_notifier_info *info) 5210 { 5211 u16 bucket_index = info->nh_res_bucket->bucket_index; 5212 struct netlink_ext_ack *extack = info->extack; 5213 struct mlxsw_sp_nexthop_group_info *nhgi; 5214 struct nh_notifier_single_info *nh_obj; 5215 struct mlxsw_sp_nexthop_group *nh_grp; 5216 struct mlxsw_sp_nexthop *nh; 5217 int err; 5218 5219 nh_grp = mlxsw_sp_nexthop_obj_group_lookup(mlxsw_sp, info->id); 5220 if (!nh_grp) { 5221 NL_SET_ERR_MSG_MOD(extack, "Nexthop group was not found"); 5222 return -EINVAL; 5223 } 5224 5225 nhgi = nh_grp->nhgi; 5226 5227 if (bucket_index >= nhgi->count) { 5228 NL_SET_ERR_MSG_MOD(extack, "Nexthop bucket index out of range"); 5229 return -EINVAL; 5230 } 5231 5232 nh = &nhgi->nexthops[bucket_index]; 5233 mlxsw_sp_nexthop_obj_fini(mlxsw_sp, nh); 5234 5235 nh_obj = &info->nh_res_bucket->new_nh; 5236 err = mlxsw_sp_nexthop_obj_init(mlxsw_sp, nh_grp, nh, nh_obj, 1); 5237 if (err) { 5238 NL_SET_ERR_MSG_MOD(extack, "Failed to initialize nexthop object for nexthop bucket replacement"); 5239 goto err_nexthop_obj_init; 5240 } 5241 5242 err = mlxsw_sp_nexthop_obj_bucket_adj_update(mlxsw_sp, nh, info); 5243 if (err) 5244 goto err_nexthop_obj_bucket_adj_update; 5245 5246 return 0; 5247 5248 err_nexthop_obj_bucket_adj_update: 5249 mlxsw_sp_nexthop_obj_fini(mlxsw_sp, nh); 5250 err_nexthop_obj_init: 5251 nh_obj = &info->nh_res_bucket->old_nh; 5252 mlxsw_sp_nexthop_obj_init(mlxsw_sp, nh_grp, nh, nh_obj, 1); 5253 /* The old adjacency entry was not overwritten */ 5254 nh->update = 0; 5255 nh->offloaded = 1; 5256 return err; 5257 } 5258 5259 static int mlxsw_sp_nexthop_obj_event(struct notifier_block *nb, 5260 unsigned long event, void *ptr) 5261 { 5262 struct nh_notifier_info *info = ptr; 5263 struct mlxsw_sp_router *router; 5264 int err = 0; 5265 5266 router = container_of(nb, struct mlxsw_sp_router, nexthop_nb); 5267 err = mlxsw_sp_nexthop_obj_validate(router->mlxsw_sp, event, info); 5268 if (err) 5269 goto out; 5270 5271 mutex_lock(&router->lock); 5272 5273 switch (event) { 5274 case NEXTHOP_EVENT_REPLACE: 5275 err = mlxsw_sp_nexthop_obj_new(router->mlxsw_sp, info); 5276 break; 5277 case NEXTHOP_EVENT_DEL: 5278 mlxsw_sp_nexthop_obj_del(router->mlxsw_sp, info); 5279 break; 5280 case NEXTHOP_EVENT_BUCKET_REPLACE: 5281 err = mlxsw_sp_nexthop_obj_bucket_replace(router->mlxsw_sp, 5282 info); 5283 break; 5284 default: 5285 break; 5286 } 5287 5288 mutex_unlock(&router->lock); 5289 5290 out: 5291 return notifier_from_errno(err); 5292 } 5293 5294 static bool mlxsw_sp_fi_is_gateway(const struct mlxsw_sp *mlxsw_sp, 5295 struct fib_info *fi) 5296 { 5297 const struct fib_nh *nh = fib_info_nh(fi, 0); 5298 5299 return nh->fib_nh_gw_family || 5300 mlxsw_sp_nexthop4_ipip_type(mlxsw_sp, nh, NULL); 5301 } 5302 5303 static int 5304 mlxsw_sp_nexthop4_group_info_init(struct mlxsw_sp *mlxsw_sp, 5305 struct mlxsw_sp_nexthop_group *nh_grp) 5306 { 5307 unsigned int nhs = fib_info_num_path(nh_grp->ipv4.fi); 5308 struct mlxsw_sp_nexthop_group_info *nhgi; 5309 struct mlxsw_sp_nexthop *nh; 5310 int err, i; 5311 5312 nhgi = kzalloc(struct_size(nhgi, nexthops, nhs), GFP_KERNEL); 5313 if (!nhgi) 5314 return -ENOMEM; 5315 nh_grp->nhgi = nhgi; 5316 nhgi->nh_grp = nh_grp; 5317 nhgi->gateway = mlxsw_sp_fi_is_gateway(mlxsw_sp, nh_grp->ipv4.fi); 5318 nhgi->count = nhs; 5319 for (i = 0; i < nhgi->count; i++) { 5320 struct fib_nh *fib_nh; 5321 5322 nh = &nhgi->nexthops[i]; 5323 fib_nh = fib_info_nh(nh_grp->ipv4.fi, i); 5324 err = mlxsw_sp_nexthop4_init(mlxsw_sp, nh_grp, nh, fib_nh); 5325 if (err) 5326 goto err_nexthop4_init; 5327 } 5328 err = mlxsw_sp_nexthop_group_inc(mlxsw_sp); 5329 if (err) 5330 goto err_group_inc; 5331 err = mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh_grp); 5332 if (err) 5333 goto err_group_refresh; 5334 5335 return 0; 5336 5337 err_group_refresh: 5338 mlxsw_sp_nexthop_group_dec(mlxsw_sp); 5339 err_group_inc: 5340 i = nhgi->count; 5341 err_nexthop4_init: 5342 for (i--; i >= 0; i--) { 5343 nh = &nhgi->nexthops[i]; 5344 mlxsw_sp_nexthop4_fini(mlxsw_sp, nh); 5345 } 5346 kfree(nhgi); 5347 return err; 5348 } 5349 5350 static void 5351 mlxsw_sp_nexthop4_group_info_fini(struct mlxsw_sp *mlxsw_sp, 5352 struct mlxsw_sp_nexthop_group *nh_grp) 5353 { 5354 struct mlxsw_sp_nexthop_group_info *nhgi = nh_grp->nhgi; 5355 int i; 5356 5357 mlxsw_sp_nexthop_group_dec(mlxsw_sp); 5358 for (i = nhgi->count - 1; i >= 0; i--) { 5359 struct mlxsw_sp_nexthop *nh = &nhgi->nexthops[i]; 5360 5361 mlxsw_sp_nexthop4_fini(mlxsw_sp, nh); 5362 } 5363 mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh_grp); 5364 WARN_ON_ONCE(nhgi->adj_index_valid); 5365 kfree(nhgi); 5366 } 5367 5368 static struct mlxsw_sp_nexthop_group * 5369 mlxsw_sp_nexthop4_group_create(struct mlxsw_sp *mlxsw_sp, struct fib_info *fi) 5370 { 5371 struct mlxsw_sp_nexthop_group *nh_grp; 5372 int err; 5373 5374 nh_grp = kzalloc(sizeof(*nh_grp), GFP_KERNEL); 5375 if (!nh_grp) 5376 return ERR_PTR(-ENOMEM); 5377 INIT_LIST_HEAD(&nh_grp->vr_list); 5378 err = rhashtable_init(&nh_grp->vr_ht, 5379 &mlxsw_sp_nexthop_group_vr_ht_params); 5380 if (err) 5381 goto err_nexthop_group_vr_ht_init; 5382 INIT_LIST_HEAD(&nh_grp->fib_list); 5383 nh_grp->type = MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV4; 5384 nh_grp->ipv4.fi = fi; 5385 fib_info_hold(fi); 5386 5387 err = mlxsw_sp_nexthop4_group_info_init(mlxsw_sp, nh_grp); 5388 if (err) 5389 goto err_nexthop_group_info_init; 5390 5391 err = mlxsw_sp_nexthop_group_insert(mlxsw_sp, nh_grp); 5392 if (err) 5393 goto err_nexthop_group_insert; 5394 5395 nh_grp->can_destroy = true; 5396 5397 return nh_grp; 5398 5399 err_nexthop_group_insert: 5400 mlxsw_sp_nexthop4_group_info_fini(mlxsw_sp, nh_grp); 5401 err_nexthop_group_info_init: 5402 fib_info_put(fi); 5403 rhashtable_destroy(&nh_grp->vr_ht); 5404 err_nexthop_group_vr_ht_init: 5405 kfree(nh_grp); 5406 return ERR_PTR(err); 5407 } 5408 5409 static void 5410 mlxsw_sp_nexthop4_group_destroy(struct mlxsw_sp *mlxsw_sp, 5411 struct mlxsw_sp_nexthop_group *nh_grp) 5412 { 5413 if (!nh_grp->can_destroy) 5414 return; 5415 mlxsw_sp_nexthop_group_remove(mlxsw_sp, nh_grp); 5416 mlxsw_sp_nexthop4_group_info_fini(mlxsw_sp, nh_grp); 5417 fib_info_put(nh_grp->ipv4.fi); 5418 WARN_ON_ONCE(!list_empty(&nh_grp->vr_list)); 5419 rhashtable_destroy(&nh_grp->vr_ht); 5420 kfree(nh_grp); 5421 } 5422 5423 static int mlxsw_sp_nexthop4_group_get(struct mlxsw_sp *mlxsw_sp, 5424 struct mlxsw_sp_fib_entry *fib_entry, 5425 struct fib_info *fi) 5426 { 5427 struct mlxsw_sp_nexthop_group *nh_grp; 5428 5429 if (fi->nh) { 5430 nh_grp = mlxsw_sp_nexthop_obj_group_lookup(mlxsw_sp, 5431 fi->nh->id); 5432 if (WARN_ON_ONCE(!nh_grp)) 5433 return -EINVAL; 5434 goto out; 5435 } 5436 5437 nh_grp = mlxsw_sp_nexthop4_group_lookup(mlxsw_sp, fi); 5438 if (!nh_grp) { 5439 nh_grp = mlxsw_sp_nexthop4_group_create(mlxsw_sp, fi); 5440 if (IS_ERR(nh_grp)) 5441 return PTR_ERR(nh_grp); 5442 } 5443 out: 5444 list_add_tail(&fib_entry->nexthop_group_node, &nh_grp->fib_list); 5445 fib_entry->nh_group = nh_grp; 5446 return 0; 5447 } 5448 5449 static void mlxsw_sp_nexthop4_group_put(struct mlxsw_sp *mlxsw_sp, 5450 struct mlxsw_sp_fib_entry *fib_entry) 5451 { 5452 struct mlxsw_sp_nexthop_group *nh_grp = fib_entry->nh_group; 5453 5454 list_del(&fib_entry->nexthop_group_node); 5455 if (!list_empty(&nh_grp->fib_list)) 5456 return; 5457 5458 if (nh_grp->type == MLXSW_SP_NEXTHOP_GROUP_TYPE_OBJ) { 5459 mlxsw_sp_nexthop_obj_group_destroy(mlxsw_sp, nh_grp); 5460 return; 5461 } 5462 5463 mlxsw_sp_nexthop4_group_destroy(mlxsw_sp, nh_grp); 5464 } 5465 5466 static bool 5467 mlxsw_sp_fib4_entry_should_offload(const struct mlxsw_sp_fib_entry *fib_entry) 5468 { 5469 struct mlxsw_sp_fib4_entry *fib4_entry; 5470 5471 fib4_entry = container_of(fib_entry, struct mlxsw_sp_fib4_entry, 5472 common); 5473 return !fib4_entry->dscp; 5474 } 5475 5476 static bool 5477 mlxsw_sp_fib_entry_should_offload(const struct mlxsw_sp_fib_entry *fib_entry) 5478 { 5479 struct mlxsw_sp_nexthop_group *nh_group = fib_entry->nh_group; 5480 5481 switch (fib_entry->fib_node->fib->proto) { 5482 case MLXSW_SP_L3_PROTO_IPV4: 5483 if (!mlxsw_sp_fib4_entry_should_offload(fib_entry)) 5484 return false; 5485 break; 5486 case MLXSW_SP_L3_PROTO_IPV6: 5487 break; 5488 } 5489 5490 switch (fib_entry->type) { 5491 case MLXSW_SP_FIB_ENTRY_TYPE_REMOTE: 5492 return !!nh_group->nhgi->adj_index_valid; 5493 case MLXSW_SP_FIB_ENTRY_TYPE_LOCAL: 5494 return !!nh_group->nhgi->nh_rif; 5495 case MLXSW_SP_FIB_ENTRY_TYPE_BLACKHOLE: 5496 case MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP: 5497 case MLXSW_SP_FIB_ENTRY_TYPE_NVE_DECAP: 5498 return true; 5499 default: 5500 return false; 5501 } 5502 } 5503 5504 static struct mlxsw_sp_nexthop * 5505 mlxsw_sp_rt6_nexthop(struct mlxsw_sp_nexthop_group *nh_grp, 5506 const struct mlxsw_sp_rt6 *mlxsw_sp_rt6) 5507 { 5508 int i; 5509 5510 for (i = 0; i < nh_grp->nhgi->count; i++) { 5511 struct mlxsw_sp_nexthop *nh = &nh_grp->nhgi->nexthops[i]; 5512 struct fib6_info *rt = mlxsw_sp_rt6->rt; 5513 5514 if (nh->rif && nh->rif->dev == rt->fib6_nh->fib_nh_dev && 5515 ipv6_addr_equal((const struct in6_addr *) &nh->gw_addr, 5516 &rt->fib6_nh->fib_nh_gw6)) 5517 return nh; 5518 } 5519 5520 return NULL; 5521 } 5522 5523 static void 5524 mlxsw_sp_fib4_offload_failed_flag_set(struct mlxsw_sp *mlxsw_sp, 5525 struct fib_entry_notifier_info *fen_info) 5526 { 5527 u32 *p_dst = (u32 *) &fen_info->dst; 5528 struct fib_rt_info fri; 5529 5530 fri.fi = fen_info->fi; 5531 fri.tb_id = fen_info->tb_id; 5532 fri.dst = cpu_to_be32(*p_dst); 5533 fri.dst_len = fen_info->dst_len; 5534 fri.dscp = fen_info->dscp; 5535 fri.type = fen_info->type; 5536 fri.offload = false; 5537 fri.trap = false; 5538 fri.offload_failed = true; 5539 fib_alias_hw_flags_set(mlxsw_sp_net(mlxsw_sp), &fri); 5540 } 5541 5542 static void 5543 mlxsw_sp_fib4_entry_hw_flags_set(struct mlxsw_sp *mlxsw_sp, 5544 struct mlxsw_sp_fib_entry *fib_entry) 5545 { 5546 u32 *p_dst = (u32 *) fib_entry->fib_node->key.addr; 5547 int dst_len = fib_entry->fib_node->key.prefix_len; 5548 struct mlxsw_sp_fib4_entry *fib4_entry; 5549 struct fib_rt_info fri; 5550 bool should_offload; 5551 5552 should_offload = mlxsw_sp_fib_entry_should_offload(fib_entry); 5553 fib4_entry = container_of(fib_entry, struct mlxsw_sp_fib4_entry, 5554 common); 5555 fri.fi = fib4_entry->fi; 5556 fri.tb_id = fib4_entry->tb_id; 5557 fri.dst = cpu_to_be32(*p_dst); 5558 fri.dst_len = dst_len; 5559 fri.dscp = fib4_entry->dscp; 5560 fri.type = fib4_entry->type; 5561 fri.offload = should_offload; 5562 fri.trap = !should_offload; 5563 fri.offload_failed = false; 5564 fib_alias_hw_flags_set(mlxsw_sp_net(mlxsw_sp), &fri); 5565 } 5566 5567 static void 5568 mlxsw_sp_fib4_entry_hw_flags_clear(struct mlxsw_sp *mlxsw_sp, 5569 struct mlxsw_sp_fib_entry *fib_entry) 5570 { 5571 u32 *p_dst = (u32 *) fib_entry->fib_node->key.addr; 5572 int dst_len = fib_entry->fib_node->key.prefix_len; 5573 struct mlxsw_sp_fib4_entry *fib4_entry; 5574 struct fib_rt_info fri; 5575 5576 fib4_entry = container_of(fib_entry, struct mlxsw_sp_fib4_entry, 5577 common); 5578 fri.fi = fib4_entry->fi; 5579 fri.tb_id = fib4_entry->tb_id; 5580 fri.dst = cpu_to_be32(*p_dst); 5581 fri.dst_len = dst_len; 5582 fri.dscp = fib4_entry->dscp; 5583 fri.type = fib4_entry->type; 5584 fri.offload = false; 5585 fri.trap = false; 5586 fri.offload_failed = false; 5587 fib_alias_hw_flags_set(mlxsw_sp_net(mlxsw_sp), &fri); 5588 } 5589 5590 #if IS_ENABLED(CONFIG_IPV6) 5591 static void 5592 mlxsw_sp_fib6_offload_failed_flag_set(struct mlxsw_sp *mlxsw_sp, 5593 struct fib6_info **rt_arr, 5594 unsigned int nrt6) 5595 { 5596 int i; 5597 5598 /* In IPv6 a multipath route is represented using multiple routes, so 5599 * we need to set the flags on all of them. 5600 */ 5601 for (i = 0; i < nrt6; i++) 5602 fib6_info_hw_flags_set(mlxsw_sp_net(mlxsw_sp), rt_arr[i], 5603 false, false, true); 5604 } 5605 #else 5606 static void 5607 mlxsw_sp_fib6_offload_failed_flag_set(struct mlxsw_sp *mlxsw_sp, 5608 struct fib6_info **rt_arr, 5609 unsigned int nrt6) 5610 { 5611 } 5612 #endif 5613 5614 #if IS_ENABLED(CONFIG_IPV6) 5615 static void 5616 mlxsw_sp_fib6_entry_hw_flags_set(struct mlxsw_sp *mlxsw_sp, 5617 struct mlxsw_sp_fib_entry *fib_entry) 5618 { 5619 struct mlxsw_sp_fib6_entry *fib6_entry; 5620 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 5621 bool should_offload; 5622 5623 should_offload = mlxsw_sp_fib_entry_should_offload(fib_entry); 5624 5625 /* In IPv6 a multipath route is represented using multiple routes, so 5626 * we need to set the flags on all of them. 5627 */ 5628 fib6_entry = container_of(fib_entry, struct mlxsw_sp_fib6_entry, 5629 common); 5630 list_for_each_entry(mlxsw_sp_rt6, &fib6_entry->rt6_list, list) 5631 fib6_info_hw_flags_set(mlxsw_sp_net(mlxsw_sp), mlxsw_sp_rt6->rt, 5632 should_offload, !should_offload, false); 5633 } 5634 #else 5635 static void 5636 mlxsw_sp_fib6_entry_hw_flags_set(struct mlxsw_sp *mlxsw_sp, 5637 struct mlxsw_sp_fib_entry *fib_entry) 5638 { 5639 } 5640 #endif 5641 5642 #if IS_ENABLED(CONFIG_IPV6) 5643 static void 5644 mlxsw_sp_fib6_entry_hw_flags_clear(struct mlxsw_sp *mlxsw_sp, 5645 struct mlxsw_sp_fib_entry *fib_entry) 5646 { 5647 struct mlxsw_sp_fib6_entry *fib6_entry; 5648 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 5649 5650 fib6_entry = container_of(fib_entry, struct mlxsw_sp_fib6_entry, 5651 common); 5652 list_for_each_entry(mlxsw_sp_rt6, &fib6_entry->rt6_list, list) 5653 fib6_info_hw_flags_set(mlxsw_sp_net(mlxsw_sp), mlxsw_sp_rt6->rt, 5654 false, false, false); 5655 } 5656 #else 5657 static void 5658 mlxsw_sp_fib6_entry_hw_flags_clear(struct mlxsw_sp *mlxsw_sp, 5659 struct mlxsw_sp_fib_entry *fib_entry) 5660 { 5661 } 5662 #endif 5663 5664 static void 5665 mlxsw_sp_fib_entry_hw_flags_set(struct mlxsw_sp *mlxsw_sp, 5666 struct mlxsw_sp_fib_entry *fib_entry) 5667 { 5668 switch (fib_entry->fib_node->fib->proto) { 5669 case MLXSW_SP_L3_PROTO_IPV4: 5670 mlxsw_sp_fib4_entry_hw_flags_set(mlxsw_sp, fib_entry); 5671 break; 5672 case MLXSW_SP_L3_PROTO_IPV6: 5673 mlxsw_sp_fib6_entry_hw_flags_set(mlxsw_sp, fib_entry); 5674 break; 5675 } 5676 } 5677 5678 static void 5679 mlxsw_sp_fib_entry_hw_flags_clear(struct mlxsw_sp *mlxsw_sp, 5680 struct mlxsw_sp_fib_entry *fib_entry) 5681 { 5682 switch (fib_entry->fib_node->fib->proto) { 5683 case MLXSW_SP_L3_PROTO_IPV4: 5684 mlxsw_sp_fib4_entry_hw_flags_clear(mlxsw_sp, fib_entry); 5685 break; 5686 case MLXSW_SP_L3_PROTO_IPV6: 5687 mlxsw_sp_fib6_entry_hw_flags_clear(mlxsw_sp, fib_entry); 5688 break; 5689 } 5690 } 5691 5692 static void 5693 mlxsw_sp_fib_entry_hw_flags_refresh(struct mlxsw_sp *mlxsw_sp, 5694 struct mlxsw_sp_fib_entry *fib_entry, 5695 enum mlxsw_reg_ralue_op op) 5696 { 5697 switch (op) { 5698 case MLXSW_REG_RALUE_OP_WRITE_WRITE: 5699 mlxsw_sp_fib_entry_hw_flags_set(mlxsw_sp, fib_entry); 5700 break; 5701 case MLXSW_REG_RALUE_OP_WRITE_DELETE: 5702 mlxsw_sp_fib_entry_hw_flags_clear(mlxsw_sp, fib_entry); 5703 break; 5704 default: 5705 break; 5706 } 5707 } 5708 5709 static void 5710 mlxsw_sp_fib_entry_ralue_pack(char *ralue_pl, 5711 const struct mlxsw_sp_fib_entry *fib_entry, 5712 enum mlxsw_reg_ralue_op op) 5713 { 5714 struct mlxsw_sp_fib *fib = fib_entry->fib_node->fib; 5715 enum mlxsw_reg_ralxx_protocol proto; 5716 u32 *p_dip; 5717 5718 proto = (enum mlxsw_reg_ralxx_protocol) fib->proto; 5719 5720 switch (fib->proto) { 5721 case MLXSW_SP_L3_PROTO_IPV4: 5722 p_dip = (u32 *) fib_entry->fib_node->key.addr; 5723 mlxsw_reg_ralue_pack4(ralue_pl, proto, op, fib->vr->id, 5724 fib_entry->fib_node->key.prefix_len, 5725 *p_dip); 5726 break; 5727 case MLXSW_SP_L3_PROTO_IPV6: 5728 mlxsw_reg_ralue_pack6(ralue_pl, proto, op, fib->vr->id, 5729 fib_entry->fib_node->key.prefix_len, 5730 fib_entry->fib_node->key.addr); 5731 break; 5732 } 5733 } 5734 5735 static int mlxsw_sp_fib_entry_op_remote(struct mlxsw_sp *mlxsw_sp, 5736 struct mlxsw_sp_fib_entry *fib_entry, 5737 enum mlxsw_reg_ralue_op op) 5738 { 5739 struct mlxsw_sp_nexthop_group *nh_group = fib_entry->nh_group; 5740 struct mlxsw_sp_nexthop_group_info *nhgi = nh_group->nhgi; 5741 char ralue_pl[MLXSW_REG_RALUE_LEN]; 5742 enum mlxsw_reg_ralue_trap_action trap_action; 5743 u16 trap_id = 0; 5744 u32 adjacency_index = 0; 5745 u16 ecmp_size = 0; 5746 5747 /* In case the nexthop group adjacency index is valid, use it 5748 * with provided ECMP size. Otherwise, setup trap and pass 5749 * traffic to kernel. 5750 */ 5751 if (mlxsw_sp_fib_entry_should_offload(fib_entry)) { 5752 trap_action = MLXSW_REG_RALUE_TRAP_ACTION_NOP; 5753 adjacency_index = nhgi->adj_index; 5754 ecmp_size = nhgi->ecmp_size; 5755 } else if (!nhgi->adj_index_valid && nhgi->count && nhgi->nh_rif) { 5756 trap_action = MLXSW_REG_RALUE_TRAP_ACTION_NOP; 5757 adjacency_index = mlxsw_sp->router->adj_trap_index; 5758 ecmp_size = 1; 5759 } else { 5760 trap_action = MLXSW_REG_RALUE_TRAP_ACTION_TRAP; 5761 trap_id = MLXSW_TRAP_ID_RTR_INGRESS0; 5762 } 5763 5764 mlxsw_sp_fib_entry_ralue_pack(ralue_pl, fib_entry, op); 5765 mlxsw_reg_ralue_act_remote_pack(ralue_pl, trap_action, trap_id, 5766 adjacency_index, ecmp_size); 5767 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), ralue_pl); 5768 } 5769 5770 static int mlxsw_sp_fib_entry_op_local(struct mlxsw_sp *mlxsw_sp, 5771 struct mlxsw_sp_fib_entry *fib_entry, 5772 enum mlxsw_reg_ralue_op op) 5773 { 5774 struct mlxsw_sp_rif *rif = fib_entry->nh_group->nhgi->nh_rif; 5775 enum mlxsw_reg_ralue_trap_action trap_action; 5776 char ralue_pl[MLXSW_REG_RALUE_LEN]; 5777 u16 trap_id = 0; 5778 u16 rif_index = 0; 5779 5780 if (mlxsw_sp_fib_entry_should_offload(fib_entry)) { 5781 trap_action = MLXSW_REG_RALUE_TRAP_ACTION_NOP; 5782 rif_index = rif->rif_index; 5783 } else { 5784 trap_action = MLXSW_REG_RALUE_TRAP_ACTION_TRAP; 5785 trap_id = MLXSW_TRAP_ID_RTR_INGRESS0; 5786 } 5787 5788 mlxsw_sp_fib_entry_ralue_pack(ralue_pl, fib_entry, op); 5789 mlxsw_reg_ralue_act_local_pack(ralue_pl, trap_action, trap_id, 5790 rif_index); 5791 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), ralue_pl); 5792 } 5793 5794 static int mlxsw_sp_fib_entry_op_trap(struct mlxsw_sp *mlxsw_sp, 5795 struct mlxsw_sp_fib_entry *fib_entry, 5796 enum mlxsw_reg_ralue_op op) 5797 { 5798 char ralue_pl[MLXSW_REG_RALUE_LEN]; 5799 5800 mlxsw_sp_fib_entry_ralue_pack(ralue_pl, fib_entry, op); 5801 mlxsw_reg_ralue_act_ip2me_pack(ralue_pl); 5802 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), ralue_pl); 5803 } 5804 5805 static int mlxsw_sp_fib_entry_op_blackhole(struct mlxsw_sp *mlxsw_sp, 5806 struct mlxsw_sp_fib_entry *fib_entry, 5807 enum mlxsw_reg_ralue_op op) 5808 { 5809 enum mlxsw_reg_ralue_trap_action trap_action; 5810 char ralue_pl[MLXSW_REG_RALUE_LEN]; 5811 5812 trap_action = MLXSW_REG_RALUE_TRAP_ACTION_DISCARD_ERROR; 5813 mlxsw_sp_fib_entry_ralue_pack(ralue_pl, fib_entry, op); 5814 mlxsw_reg_ralue_act_local_pack(ralue_pl, trap_action, 0, 0); 5815 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), ralue_pl); 5816 } 5817 5818 static int 5819 mlxsw_sp_fib_entry_op_unreachable(struct mlxsw_sp *mlxsw_sp, 5820 struct mlxsw_sp_fib_entry *fib_entry, 5821 enum mlxsw_reg_ralue_op op) 5822 { 5823 enum mlxsw_reg_ralue_trap_action trap_action; 5824 char ralue_pl[MLXSW_REG_RALUE_LEN]; 5825 u16 trap_id; 5826 5827 trap_action = MLXSW_REG_RALUE_TRAP_ACTION_TRAP; 5828 trap_id = MLXSW_TRAP_ID_RTR_INGRESS1; 5829 5830 mlxsw_sp_fib_entry_ralue_pack(ralue_pl, fib_entry, op); 5831 mlxsw_reg_ralue_act_local_pack(ralue_pl, trap_action, trap_id, 0); 5832 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), ralue_pl); 5833 } 5834 5835 static int 5836 mlxsw_sp_fib_entry_op_ipip_decap(struct mlxsw_sp *mlxsw_sp, 5837 struct mlxsw_sp_fib_entry *fib_entry, 5838 enum mlxsw_reg_ralue_op op) 5839 { 5840 struct mlxsw_sp_ipip_entry *ipip_entry = fib_entry->decap.ipip_entry; 5841 const struct mlxsw_sp_ipip_ops *ipip_ops; 5842 char ralue_pl[MLXSW_REG_RALUE_LEN]; 5843 int err; 5844 5845 if (WARN_ON(!ipip_entry)) 5846 return -EINVAL; 5847 5848 ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt]; 5849 err = ipip_ops->decap_config(mlxsw_sp, ipip_entry, 5850 fib_entry->decap.tunnel_index); 5851 if (err) 5852 return err; 5853 5854 mlxsw_sp_fib_entry_ralue_pack(ralue_pl, fib_entry, op); 5855 mlxsw_reg_ralue_act_ip2me_tun_pack(ralue_pl, 5856 fib_entry->decap.tunnel_index); 5857 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), ralue_pl); 5858 } 5859 5860 static int mlxsw_sp_fib_entry_op_nve_decap(struct mlxsw_sp *mlxsw_sp, 5861 struct mlxsw_sp_fib_entry *fib_entry, 5862 enum mlxsw_reg_ralue_op op) 5863 { 5864 char ralue_pl[MLXSW_REG_RALUE_LEN]; 5865 5866 mlxsw_sp_fib_entry_ralue_pack(ralue_pl, fib_entry, op); 5867 mlxsw_reg_ralue_act_ip2me_tun_pack(ralue_pl, 5868 fib_entry->decap.tunnel_index); 5869 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), ralue_pl); 5870 } 5871 5872 static int __mlxsw_sp_fib_entry_op(struct mlxsw_sp *mlxsw_sp, 5873 struct mlxsw_sp_fib_entry *fib_entry, 5874 enum mlxsw_reg_ralue_op op) 5875 { 5876 switch (fib_entry->type) { 5877 case MLXSW_SP_FIB_ENTRY_TYPE_REMOTE: 5878 return mlxsw_sp_fib_entry_op_remote(mlxsw_sp, fib_entry, op); 5879 case MLXSW_SP_FIB_ENTRY_TYPE_LOCAL: 5880 return mlxsw_sp_fib_entry_op_local(mlxsw_sp, fib_entry, op); 5881 case MLXSW_SP_FIB_ENTRY_TYPE_TRAP: 5882 return mlxsw_sp_fib_entry_op_trap(mlxsw_sp, fib_entry, op); 5883 case MLXSW_SP_FIB_ENTRY_TYPE_BLACKHOLE: 5884 return mlxsw_sp_fib_entry_op_blackhole(mlxsw_sp, fib_entry, op); 5885 case MLXSW_SP_FIB_ENTRY_TYPE_UNREACHABLE: 5886 return mlxsw_sp_fib_entry_op_unreachable(mlxsw_sp, fib_entry, 5887 op); 5888 case MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP: 5889 return mlxsw_sp_fib_entry_op_ipip_decap(mlxsw_sp, 5890 fib_entry, op); 5891 case MLXSW_SP_FIB_ENTRY_TYPE_NVE_DECAP: 5892 return mlxsw_sp_fib_entry_op_nve_decap(mlxsw_sp, fib_entry, op); 5893 } 5894 return -EINVAL; 5895 } 5896 5897 static int mlxsw_sp_fib_entry_op(struct mlxsw_sp *mlxsw_sp, 5898 struct mlxsw_sp_fib_entry *fib_entry, 5899 enum mlxsw_reg_ralue_op op) 5900 { 5901 int err = __mlxsw_sp_fib_entry_op(mlxsw_sp, fib_entry, op); 5902 5903 if (err) 5904 return err; 5905 5906 mlxsw_sp_fib_entry_hw_flags_refresh(mlxsw_sp, fib_entry, op); 5907 5908 return err; 5909 } 5910 5911 static int mlxsw_sp_fib_entry_update(struct mlxsw_sp *mlxsw_sp, 5912 struct mlxsw_sp_fib_entry *fib_entry) 5913 { 5914 return mlxsw_sp_fib_entry_op(mlxsw_sp, fib_entry, 5915 MLXSW_REG_RALUE_OP_WRITE_WRITE); 5916 } 5917 5918 static int mlxsw_sp_fib_entry_del(struct mlxsw_sp *mlxsw_sp, 5919 struct mlxsw_sp_fib_entry *fib_entry) 5920 { 5921 return mlxsw_sp_fib_entry_op(mlxsw_sp, fib_entry, 5922 MLXSW_REG_RALUE_OP_WRITE_DELETE); 5923 } 5924 5925 static int 5926 mlxsw_sp_fib4_entry_type_set(struct mlxsw_sp *mlxsw_sp, 5927 const struct fib_entry_notifier_info *fen_info, 5928 struct mlxsw_sp_fib_entry *fib_entry) 5929 { 5930 struct mlxsw_sp_nexthop_group_info *nhgi = fib_entry->nh_group->nhgi; 5931 union mlxsw_sp_l3addr dip = { .addr4 = htonl(fen_info->dst) }; 5932 struct mlxsw_sp_router *router = mlxsw_sp->router; 5933 u32 tb_id = mlxsw_sp_fix_tb_id(fen_info->tb_id); 5934 int ifindex = nhgi->nexthops[0].ifindex; 5935 struct mlxsw_sp_ipip_entry *ipip_entry; 5936 5937 switch (fen_info->type) { 5938 case RTN_LOCAL: 5939 ipip_entry = mlxsw_sp_ipip_entry_find_by_decap(mlxsw_sp, ifindex, 5940 MLXSW_SP_L3_PROTO_IPV4, dip); 5941 if (ipip_entry && ipip_entry->ol_dev->flags & IFF_UP) { 5942 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP; 5943 return mlxsw_sp_fib_entry_decap_init(mlxsw_sp, 5944 fib_entry, 5945 ipip_entry); 5946 } 5947 if (mlxsw_sp_router_nve_is_decap(mlxsw_sp, tb_id, 5948 MLXSW_SP_L3_PROTO_IPV4, 5949 &dip)) { 5950 u32 tunnel_index; 5951 5952 tunnel_index = router->nve_decap_config.tunnel_index; 5953 fib_entry->decap.tunnel_index = tunnel_index; 5954 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_NVE_DECAP; 5955 return 0; 5956 } 5957 fallthrough; 5958 case RTN_BROADCAST: 5959 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP; 5960 return 0; 5961 case RTN_BLACKHOLE: 5962 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_BLACKHOLE; 5963 return 0; 5964 case RTN_UNREACHABLE: 5965 case RTN_PROHIBIT: 5966 /* Packets hitting these routes need to be trapped, but 5967 * can do so with a lower priority than packets directed 5968 * at the host, so use action type local instead of trap. 5969 */ 5970 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_UNREACHABLE; 5971 return 0; 5972 case RTN_UNICAST: 5973 if (nhgi->gateway) 5974 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_REMOTE; 5975 else 5976 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_LOCAL; 5977 return 0; 5978 default: 5979 return -EINVAL; 5980 } 5981 } 5982 5983 static void 5984 mlxsw_sp_fib_entry_type_unset(struct mlxsw_sp *mlxsw_sp, 5985 struct mlxsw_sp_fib_entry *fib_entry) 5986 { 5987 switch (fib_entry->type) { 5988 case MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP: 5989 mlxsw_sp_fib_entry_decap_fini(mlxsw_sp, fib_entry); 5990 break; 5991 default: 5992 break; 5993 } 5994 } 5995 5996 static void 5997 mlxsw_sp_fib4_entry_type_unset(struct mlxsw_sp *mlxsw_sp, 5998 struct mlxsw_sp_fib4_entry *fib4_entry) 5999 { 6000 mlxsw_sp_fib_entry_type_unset(mlxsw_sp, &fib4_entry->common); 6001 } 6002 6003 static struct mlxsw_sp_fib4_entry * 6004 mlxsw_sp_fib4_entry_create(struct mlxsw_sp *mlxsw_sp, 6005 struct mlxsw_sp_fib_node *fib_node, 6006 const struct fib_entry_notifier_info *fen_info) 6007 { 6008 struct mlxsw_sp_fib4_entry *fib4_entry; 6009 struct mlxsw_sp_fib_entry *fib_entry; 6010 int err; 6011 6012 fib4_entry = kzalloc(sizeof(*fib4_entry), GFP_KERNEL); 6013 if (!fib4_entry) 6014 return ERR_PTR(-ENOMEM); 6015 fib_entry = &fib4_entry->common; 6016 6017 err = mlxsw_sp_nexthop4_group_get(mlxsw_sp, fib_entry, fen_info->fi); 6018 if (err) 6019 goto err_nexthop4_group_get; 6020 6021 err = mlxsw_sp_nexthop_group_vr_link(fib_entry->nh_group, 6022 fib_node->fib); 6023 if (err) 6024 goto err_nexthop_group_vr_link; 6025 6026 err = mlxsw_sp_fib4_entry_type_set(mlxsw_sp, fen_info, fib_entry); 6027 if (err) 6028 goto err_fib4_entry_type_set; 6029 6030 fib4_entry->fi = fen_info->fi; 6031 fib_info_hold(fib4_entry->fi); 6032 fib4_entry->tb_id = fen_info->tb_id; 6033 fib4_entry->type = fen_info->type; 6034 fib4_entry->dscp = fen_info->dscp; 6035 6036 fib_entry->fib_node = fib_node; 6037 6038 return fib4_entry; 6039 6040 err_fib4_entry_type_set: 6041 mlxsw_sp_nexthop_group_vr_unlink(fib_entry->nh_group, fib_node->fib); 6042 err_nexthop_group_vr_link: 6043 mlxsw_sp_nexthop4_group_put(mlxsw_sp, &fib4_entry->common); 6044 err_nexthop4_group_get: 6045 kfree(fib4_entry); 6046 return ERR_PTR(err); 6047 } 6048 6049 static void mlxsw_sp_fib4_entry_destroy(struct mlxsw_sp *mlxsw_sp, 6050 struct mlxsw_sp_fib4_entry *fib4_entry) 6051 { 6052 struct mlxsw_sp_fib_node *fib_node = fib4_entry->common.fib_node; 6053 6054 fib_info_put(fib4_entry->fi); 6055 mlxsw_sp_fib4_entry_type_unset(mlxsw_sp, fib4_entry); 6056 mlxsw_sp_nexthop_group_vr_unlink(fib4_entry->common.nh_group, 6057 fib_node->fib); 6058 mlxsw_sp_nexthop4_group_put(mlxsw_sp, &fib4_entry->common); 6059 kfree(fib4_entry); 6060 } 6061 6062 static struct mlxsw_sp_fib4_entry * 6063 mlxsw_sp_fib4_entry_lookup(struct mlxsw_sp *mlxsw_sp, 6064 const struct fib_entry_notifier_info *fen_info) 6065 { 6066 struct mlxsw_sp_fib4_entry *fib4_entry; 6067 struct mlxsw_sp_fib_node *fib_node; 6068 struct mlxsw_sp_fib *fib; 6069 struct mlxsw_sp_vr *vr; 6070 6071 vr = mlxsw_sp_vr_find(mlxsw_sp, fen_info->tb_id); 6072 if (!vr) 6073 return NULL; 6074 fib = mlxsw_sp_vr_fib(vr, MLXSW_SP_L3_PROTO_IPV4); 6075 6076 fib_node = mlxsw_sp_fib_node_lookup(fib, &fen_info->dst, 6077 sizeof(fen_info->dst), 6078 fen_info->dst_len); 6079 if (!fib_node) 6080 return NULL; 6081 6082 fib4_entry = container_of(fib_node->fib_entry, 6083 struct mlxsw_sp_fib4_entry, common); 6084 if (fib4_entry->tb_id == fen_info->tb_id && 6085 fib4_entry->dscp == fen_info->dscp && 6086 fib4_entry->type == fen_info->type && 6087 fib4_entry->fi == fen_info->fi) 6088 return fib4_entry; 6089 6090 return NULL; 6091 } 6092 6093 static const struct rhashtable_params mlxsw_sp_fib_ht_params = { 6094 .key_offset = offsetof(struct mlxsw_sp_fib_node, key), 6095 .head_offset = offsetof(struct mlxsw_sp_fib_node, ht_node), 6096 .key_len = sizeof(struct mlxsw_sp_fib_key), 6097 .automatic_shrinking = true, 6098 }; 6099 6100 static int mlxsw_sp_fib_node_insert(struct mlxsw_sp_fib *fib, 6101 struct mlxsw_sp_fib_node *fib_node) 6102 { 6103 return rhashtable_insert_fast(&fib->ht, &fib_node->ht_node, 6104 mlxsw_sp_fib_ht_params); 6105 } 6106 6107 static void mlxsw_sp_fib_node_remove(struct mlxsw_sp_fib *fib, 6108 struct mlxsw_sp_fib_node *fib_node) 6109 { 6110 rhashtable_remove_fast(&fib->ht, &fib_node->ht_node, 6111 mlxsw_sp_fib_ht_params); 6112 } 6113 6114 static struct mlxsw_sp_fib_node * 6115 mlxsw_sp_fib_node_lookup(struct mlxsw_sp_fib *fib, const void *addr, 6116 size_t addr_len, unsigned char prefix_len) 6117 { 6118 struct mlxsw_sp_fib_key key; 6119 6120 memset(&key, 0, sizeof(key)); 6121 memcpy(key.addr, addr, addr_len); 6122 key.prefix_len = prefix_len; 6123 return rhashtable_lookup_fast(&fib->ht, &key, mlxsw_sp_fib_ht_params); 6124 } 6125 6126 static struct mlxsw_sp_fib_node * 6127 mlxsw_sp_fib_node_create(struct mlxsw_sp_fib *fib, const void *addr, 6128 size_t addr_len, unsigned char prefix_len) 6129 { 6130 struct mlxsw_sp_fib_node *fib_node; 6131 6132 fib_node = kzalloc(sizeof(*fib_node), GFP_KERNEL); 6133 if (!fib_node) 6134 return NULL; 6135 6136 list_add(&fib_node->list, &fib->node_list); 6137 memcpy(fib_node->key.addr, addr, addr_len); 6138 fib_node->key.prefix_len = prefix_len; 6139 6140 return fib_node; 6141 } 6142 6143 static void mlxsw_sp_fib_node_destroy(struct mlxsw_sp_fib_node *fib_node) 6144 { 6145 list_del(&fib_node->list); 6146 kfree(fib_node); 6147 } 6148 6149 static int mlxsw_sp_fib_lpm_tree_link(struct mlxsw_sp *mlxsw_sp, 6150 struct mlxsw_sp_fib_node *fib_node) 6151 { 6152 struct mlxsw_sp_prefix_usage req_prefix_usage; 6153 struct mlxsw_sp_fib *fib = fib_node->fib; 6154 struct mlxsw_sp_lpm_tree *lpm_tree; 6155 int err; 6156 6157 lpm_tree = mlxsw_sp->router->lpm.proto_trees[fib->proto]; 6158 if (lpm_tree->prefix_ref_count[fib_node->key.prefix_len] != 0) 6159 goto out; 6160 6161 mlxsw_sp_prefix_usage_cpy(&req_prefix_usage, &lpm_tree->prefix_usage); 6162 mlxsw_sp_prefix_usage_set(&req_prefix_usage, fib_node->key.prefix_len); 6163 lpm_tree = mlxsw_sp_lpm_tree_get(mlxsw_sp, &req_prefix_usage, 6164 fib->proto); 6165 if (IS_ERR(lpm_tree)) 6166 return PTR_ERR(lpm_tree); 6167 6168 err = mlxsw_sp_vrs_lpm_tree_replace(mlxsw_sp, fib, lpm_tree); 6169 if (err) 6170 goto err_lpm_tree_replace; 6171 6172 out: 6173 lpm_tree->prefix_ref_count[fib_node->key.prefix_len]++; 6174 return 0; 6175 6176 err_lpm_tree_replace: 6177 mlxsw_sp_lpm_tree_put(mlxsw_sp, lpm_tree); 6178 return err; 6179 } 6180 6181 static void mlxsw_sp_fib_lpm_tree_unlink(struct mlxsw_sp *mlxsw_sp, 6182 struct mlxsw_sp_fib_node *fib_node) 6183 { 6184 struct mlxsw_sp_lpm_tree *lpm_tree = fib_node->fib->lpm_tree; 6185 struct mlxsw_sp_prefix_usage req_prefix_usage; 6186 struct mlxsw_sp_fib *fib = fib_node->fib; 6187 int err; 6188 6189 if (--lpm_tree->prefix_ref_count[fib_node->key.prefix_len] != 0) 6190 return; 6191 /* Try to construct a new LPM tree from the current prefix usage 6192 * minus the unused one. If we fail, continue using the old one. 6193 */ 6194 mlxsw_sp_prefix_usage_cpy(&req_prefix_usage, &lpm_tree->prefix_usage); 6195 mlxsw_sp_prefix_usage_clear(&req_prefix_usage, 6196 fib_node->key.prefix_len); 6197 lpm_tree = mlxsw_sp_lpm_tree_get(mlxsw_sp, &req_prefix_usage, 6198 fib->proto); 6199 if (IS_ERR(lpm_tree)) 6200 return; 6201 6202 err = mlxsw_sp_vrs_lpm_tree_replace(mlxsw_sp, fib, lpm_tree); 6203 if (err) 6204 goto err_lpm_tree_replace; 6205 6206 return; 6207 6208 err_lpm_tree_replace: 6209 mlxsw_sp_lpm_tree_put(mlxsw_sp, lpm_tree); 6210 } 6211 6212 static int mlxsw_sp_fib_node_init(struct mlxsw_sp *mlxsw_sp, 6213 struct mlxsw_sp_fib_node *fib_node, 6214 struct mlxsw_sp_fib *fib) 6215 { 6216 int err; 6217 6218 err = mlxsw_sp_fib_node_insert(fib, fib_node); 6219 if (err) 6220 return err; 6221 fib_node->fib = fib; 6222 6223 err = mlxsw_sp_fib_lpm_tree_link(mlxsw_sp, fib_node); 6224 if (err) 6225 goto err_fib_lpm_tree_link; 6226 6227 return 0; 6228 6229 err_fib_lpm_tree_link: 6230 fib_node->fib = NULL; 6231 mlxsw_sp_fib_node_remove(fib, fib_node); 6232 return err; 6233 } 6234 6235 static void mlxsw_sp_fib_node_fini(struct mlxsw_sp *mlxsw_sp, 6236 struct mlxsw_sp_fib_node *fib_node) 6237 { 6238 struct mlxsw_sp_fib *fib = fib_node->fib; 6239 6240 mlxsw_sp_fib_lpm_tree_unlink(mlxsw_sp, fib_node); 6241 fib_node->fib = NULL; 6242 mlxsw_sp_fib_node_remove(fib, fib_node); 6243 } 6244 6245 static struct mlxsw_sp_fib_node * 6246 mlxsw_sp_fib_node_get(struct mlxsw_sp *mlxsw_sp, u32 tb_id, const void *addr, 6247 size_t addr_len, unsigned char prefix_len, 6248 enum mlxsw_sp_l3proto proto) 6249 { 6250 struct mlxsw_sp_fib_node *fib_node; 6251 struct mlxsw_sp_fib *fib; 6252 struct mlxsw_sp_vr *vr; 6253 int err; 6254 6255 vr = mlxsw_sp_vr_get(mlxsw_sp, tb_id, NULL); 6256 if (IS_ERR(vr)) 6257 return ERR_CAST(vr); 6258 fib = mlxsw_sp_vr_fib(vr, proto); 6259 6260 fib_node = mlxsw_sp_fib_node_lookup(fib, addr, addr_len, prefix_len); 6261 if (fib_node) 6262 return fib_node; 6263 6264 fib_node = mlxsw_sp_fib_node_create(fib, addr, addr_len, prefix_len); 6265 if (!fib_node) { 6266 err = -ENOMEM; 6267 goto err_fib_node_create; 6268 } 6269 6270 err = mlxsw_sp_fib_node_init(mlxsw_sp, fib_node, fib); 6271 if (err) 6272 goto err_fib_node_init; 6273 6274 return fib_node; 6275 6276 err_fib_node_init: 6277 mlxsw_sp_fib_node_destroy(fib_node); 6278 err_fib_node_create: 6279 mlxsw_sp_vr_put(mlxsw_sp, vr); 6280 return ERR_PTR(err); 6281 } 6282 6283 static void mlxsw_sp_fib_node_put(struct mlxsw_sp *mlxsw_sp, 6284 struct mlxsw_sp_fib_node *fib_node) 6285 { 6286 struct mlxsw_sp_vr *vr = fib_node->fib->vr; 6287 6288 if (fib_node->fib_entry) 6289 return; 6290 mlxsw_sp_fib_node_fini(mlxsw_sp, fib_node); 6291 mlxsw_sp_fib_node_destroy(fib_node); 6292 mlxsw_sp_vr_put(mlxsw_sp, vr); 6293 } 6294 6295 static int mlxsw_sp_fib_node_entry_link(struct mlxsw_sp *mlxsw_sp, 6296 struct mlxsw_sp_fib_entry *fib_entry) 6297 { 6298 struct mlxsw_sp_fib_node *fib_node = fib_entry->fib_node; 6299 int err; 6300 6301 fib_node->fib_entry = fib_entry; 6302 6303 err = mlxsw_sp_fib_entry_update(mlxsw_sp, fib_entry); 6304 if (err) 6305 goto err_fib_entry_update; 6306 6307 return 0; 6308 6309 err_fib_entry_update: 6310 fib_node->fib_entry = NULL; 6311 return err; 6312 } 6313 6314 static void 6315 mlxsw_sp_fib_node_entry_unlink(struct mlxsw_sp *mlxsw_sp, 6316 struct mlxsw_sp_fib_entry *fib_entry) 6317 { 6318 struct mlxsw_sp_fib_node *fib_node = fib_entry->fib_node; 6319 6320 mlxsw_sp_fib_entry_del(mlxsw_sp, fib_entry); 6321 fib_node->fib_entry = NULL; 6322 } 6323 6324 static bool mlxsw_sp_fib4_allow_replace(struct mlxsw_sp_fib4_entry *fib4_entry) 6325 { 6326 struct mlxsw_sp_fib_node *fib_node = fib4_entry->common.fib_node; 6327 struct mlxsw_sp_fib4_entry *fib4_replaced; 6328 6329 if (!fib_node->fib_entry) 6330 return true; 6331 6332 fib4_replaced = container_of(fib_node->fib_entry, 6333 struct mlxsw_sp_fib4_entry, common); 6334 if (fib4_entry->tb_id == RT_TABLE_MAIN && 6335 fib4_replaced->tb_id == RT_TABLE_LOCAL) 6336 return false; 6337 6338 return true; 6339 } 6340 6341 static int 6342 mlxsw_sp_router_fib4_replace(struct mlxsw_sp *mlxsw_sp, 6343 const struct fib_entry_notifier_info *fen_info) 6344 { 6345 struct mlxsw_sp_fib4_entry *fib4_entry, *fib4_replaced; 6346 struct mlxsw_sp_fib_entry *replaced; 6347 struct mlxsw_sp_fib_node *fib_node; 6348 int err; 6349 6350 if (fen_info->fi->nh && 6351 !mlxsw_sp_nexthop_obj_group_lookup(mlxsw_sp, fen_info->fi->nh->id)) 6352 return 0; 6353 6354 fib_node = mlxsw_sp_fib_node_get(mlxsw_sp, fen_info->tb_id, 6355 &fen_info->dst, sizeof(fen_info->dst), 6356 fen_info->dst_len, 6357 MLXSW_SP_L3_PROTO_IPV4); 6358 if (IS_ERR(fib_node)) { 6359 dev_warn(mlxsw_sp->bus_info->dev, "Failed to get FIB node\n"); 6360 return PTR_ERR(fib_node); 6361 } 6362 6363 fib4_entry = mlxsw_sp_fib4_entry_create(mlxsw_sp, fib_node, fen_info); 6364 if (IS_ERR(fib4_entry)) { 6365 dev_warn(mlxsw_sp->bus_info->dev, "Failed to create FIB entry\n"); 6366 err = PTR_ERR(fib4_entry); 6367 goto err_fib4_entry_create; 6368 } 6369 6370 if (!mlxsw_sp_fib4_allow_replace(fib4_entry)) { 6371 mlxsw_sp_fib4_entry_destroy(mlxsw_sp, fib4_entry); 6372 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 6373 return 0; 6374 } 6375 6376 replaced = fib_node->fib_entry; 6377 err = mlxsw_sp_fib_node_entry_link(mlxsw_sp, &fib4_entry->common); 6378 if (err) { 6379 dev_warn(mlxsw_sp->bus_info->dev, "Failed to link FIB entry to node\n"); 6380 goto err_fib_node_entry_link; 6381 } 6382 6383 /* Nothing to replace */ 6384 if (!replaced) 6385 return 0; 6386 6387 mlxsw_sp_fib_entry_hw_flags_clear(mlxsw_sp, replaced); 6388 fib4_replaced = container_of(replaced, struct mlxsw_sp_fib4_entry, 6389 common); 6390 mlxsw_sp_fib4_entry_destroy(mlxsw_sp, fib4_replaced); 6391 6392 return 0; 6393 6394 err_fib_node_entry_link: 6395 fib_node->fib_entry = replaced; 6396 mlxsw_sp_fib4_entry_destroy(mlxsw_sp, fib4_entry); 6397 err_fib4_entry_create: 6398 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 6399 return err; 6400 } 6401 6402 static void mlxsw_sp_router_fib4_del(struct mlxsw_sp *mlxsw_sp, 6403 struct fib_entry_notifier_info *fen_info) 6404 { 6405 struct mlxsw_sp_fib4_entry *fib4_entry; 6406 struct mlxsw_sp_fib_node *fib_node; 6407 6408 fib4_entry = mlxsw_sp_fib4_entry_lookup(mlxsw_sp, fen_info); 6409 if (!fib4_entry) 6410 return; 6411 fib_node = fib4_entry->common.fib_node; 6412 6413 mlxsw_sp_fib_node_entry_unlink(mlxsw_sp, &fib4_entry->common); 6414 mlxsw_sp_fib4_entry_destroy(mlxsw_sp, fib4_entry); 6415 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 6416 } 6417 6418 static bool mlxsw_sp_fib6_rt_should_ignore(const struct fib6_info *rt) 6419 { 6420 /* Multicast routes aren't supported, so ignore them. Neighbour 6421 * Discovery packets are specifically trapped. 6422 */ 6423 if (ipv6_addr_type(&rt->fib6_dst.addr) & IPV6_ADDR_MULTICAST) 6424 return true; 6425 6426 /* Cloned routes are irrelevant in the forwarding path. */ 6427 if (rt->fib6_flags & RTF_CACHE) 6428 return true; 6429 6430 return false; 6431 } 6432 6433 static struct mlxsw_sp_rt6 *mlxsw_sp_rt6_create(struct fib6_info *rt) 6434 { 6435 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 6436 6437 mlxsw_sp_rt6 = kzalloc(sizeof(*mlxsw_sp_rt6), GFP_KERNEL); 6438 if (!mlxsw_sp_rt6) 6439 return ERR_PTR(-ENOMEM); 6440 6441 /* In case of route replace, replaced route is deleted with 6442 * no notification. Take reference to prevent accessing freed 6443 * memory. 6444 */ 6445 mlxsw_sp_rt6->rt = rt; 6446 fib6_info_hold(rt); 6447 6448 return mlxsw_sp_rt6; 6449 } 6450 6451 #if IS_ENABLED(CONFIG_IPV6) 6452 static void mlxsw_sp_rt6_release(struct fib6_info *rt) 6453 { 6454 fib6_info_release(rt); 6455 } 6456 #else 6457 static void mlxsw_sp_rt6_release(struct fib6_info *rt) 6458 { 6459 } 6460 #endif 6461 6462 static void mlxsw_sp_rt6_destroy(struct mlxsw_sp_rt6 *mlxsw_sp_rt6) 6463 { 6464 struct fib6_nh *fib6_nh = mlxsw_sp_rt6->rt->fib6_nh; 6465 6466 if (!mlxsw_sp_rt6->rt->nh) 6467 fib6_nh->fib_nh_flags &= ~RTNH_F_OFFLOAD; 6468 mlxsw_sp_rt6_release(mlxsw_sp_rt6->rt); 6469 kfree(mlxsw_sp_rt6); 6470 } 6471 6472 static struct fib6_info * 6473 mlxsw_sp_fib6_entry_rt(const struct mlxsw_sp_fib6_entry *fib6_entry) 6474 { 6475 return list_first_entry(&fib6_entry->rt6_list, struct mlxsw_sp_rt6, 6476 list)->rt; 6477 } 6478 6479 static struct mlxsw_sp_rt6 * 6480 mlxsw_sp_fib6_entry_rt_find(const struct mlxsw_sp_fib6_entry *fib6_entry, 6481 const struct fib6_info *rt) 6482 { 6483 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 6484 6485 list_for_each_entry(mlxsw_sp_rt6, &fib6_entry->rt6_list, list) { 6486 if (mlxsw_sp_rt6->rt == rt) 6487 return mlxsw_sp_rt6; 6488 } 6489 6490 return NULL; 6491 } 6492 6493 static bool mlxsw_sp_nexthop6_ipip_type(const struct mlxsw_sp *mlxsw_sp, 6494 const struct fib6_info *rt, 6495 enum mlxsw_sp_ipip_type *ret) 6496 { 6497 return rt->fib6_nh->fib_nh_dev && 6498 mlxsw_sp_netdev_ipip_type(mlxsw_sp, rt->fib6_nh->fib_nh_dev, ret); 6499 } 6500 6501 static int mlxsw_sp_nexthop6_init(struct mlxsw_sp *mlxsw_sp, 6502 struct mlxsw_sp_nexthop_group *nh_grp, 6503 struct mlxsw_sp_nexthop *nh, 6504 const struct fib6_info *rt) 6505 { 6506 struct net_device *dev = rt->fib6_nh->fib_nh_dev; 6507 int err; 6508 6509 nh->nhgi = nh_grp->nhgi; 6510 nh->nh_weight = rt->fib6_nh->fib_nh_weight; 6511 memcpy(&nh->gw_addr, &rt->fib6_nh->fib_nh_gw6, sizeof(nh->gw_addr)); 6512 #if IS_ENABLED(CONFIG_IPV6) 6513 nh->neigh_tbl = &nd_tbl; 6514 #endif 6515 mlxsw_sp_nexthop_counter_alloc(mlxsw_sp, nh); 6516 6517 list_add_tail(&nh->router_list_node, &mlxsw_sp->router->nexthop_list); 6518 6519 if (!dev) 6520 return 0; 6521 nh->ifindex = dev->ifindex; 6522 6523 err = mlxsw_sp_nexthop_type_init(mlxsw_sp, nh, dev); 6524 if (err) 6525 goto err_nexthop_type_init; 6526 6527 return 0; 6528 6529 err_nexthop_type_init: 6530 list_del(&nh->router_list_node); 6531 mlxsw_sp_nexthop_counter_free(mlxsw_sp, nh); 6532 return err; 6533 } 6534 6535 static void mlxsw_sp_nexthop6_fini(struct mlxsw_sp *mlxsw_sp, 6536 struct mlxsw_sp_nexthop *nh) 6537 { 6538 mlxsw_sp_nexthop_type_fini(mlxsw_sp, nh); 6539 list_del(&nh->router_list_node); 6540 mlxsw_sp_nexthop_counter_free(mlxsw_sp, nh); 6541 } 6542 6543 static bool mlxsw_sp_rt6_is_gateway(const struct mlxsw_sp *mlxsw_sp, 6544 const struct fib6_info *rt) 6545 { 6546 return rt->fib6_nh->fib_nh_gw_family || 6547 mlxsw_sp_nexthop6_ipip_type(mlxsw_sp, rt, NULL); 6548 } 6549 6550 static int 6551 mlxsw_sp_nexthop6_group_info_init(struct mlxsw_sp *mlxsw_sp, 6552 struct mlxsw_sp_nexthop_group *nh_grp, 6553 struct mlxsw_sp_fib6_entry *fib6_entry) 6554 { 6555 struct mlxsw_sp_nexthop_group_info *nhgi; 6556 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 6557 struct mlxsw_sp_nexthop *nh; 6558 int err, i; 6559 6560 nhgi = kzalloc(struct_size(nhgi, nexthops, fib6_entry->nrt6), 6561 GFP_KERNEL); 6562 if (!nhgi) 6563 return -ENOMEM; 6564 nh_grp->nhgi = nhgi; 6565 nhgi->nh_grp = nh_grp; 6566 mlxsw_sp_rt6 = list_first_entry(&fib6_entry->rt6_list, 6567 struct mlxsw_sp_rt6, list); 6568 nhgi->gateway = mlxsw_sp_rt6_is_gateway(mlxsw_sp, mlxsw_sp_rt6->rt); 6569 nhgi->count = fib6_entry->nrt6; 6570 for (i = 0; i < nhgi->count; i++) { 6571 struct fib6_info *rt = mlxsw_sp_rt6->rt; 6572 6573 nh = &nhgi->nexthops[i]; 6574 err = mlxsw_sp_nexthop6_init(mlxsw_sp, nh_grp, nh, rt); 6575 if (err) 6576 goto err_nexthop6_init; 6577 mlxsw_sp_rt6 = list_next_entry(mlxsw_sp_rt6, list); 6578 } 6579 nh_grp->nhgi = nhgi; 6580 err = mlxsw_sp_nexthop_group_inc(mlxsw_sp); 6581 if (err) 6582 goto err_group_inc; 6583 err = mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh_grp); 6584 if (err) 6585 goto err_group_refresh; 6586 6587 return 0; 6588 6589 err_group_refresh: 6590 mlxsw_sp_nexthop_group_dec(mlxsw_sp); 6591 err_group_inc: 6592 i = nhgi->count; 6593 err_nexthop6_init: 6594 for (i--; i >= 0; i--) { 6595 nh = &nhgi->nexthops[i]; 6596 mlxsw_sp_nexthop6_fini(mlxsw_sp, nh); 6597 } 6598 kfree(nhgi); 6599 return err; 6600 } 6601 6602 static void 6603 mlxsw_sp_nexthop6_group_info_fini(struct mlxsw_sp *mlxsw_sp, 6604 struct mlxsw_sp_nexthop_group *nh_grp) 6605 { 6606 struct mlxsw_sp_nexthop_group_info *nhgi = nh_grp->nhgi; 6607 int i; 6608 6609 mlxsw_sp_nexthop_group_dec(mlxsw_sp); 6610 for (i = nhgi->count - 1; i >= 0; i--) { 6611 struct mlxsw_sp_nexthop *nh = &nhgi->nexthops[i]; 6612 6613 mlxsw_sp_nexthop6_fini(mlxsw_sp, nh); 6614 } 6615 mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh_grp); 6616 WARN_ON_ONCE(nhgi->adj_index_valid); 6617 kfree(nhgi); 6618 } 6619 6620 static struct mlxsw_sp_nexthop_group * 6621 mlxsw_sp_nexthop6_group_create(struct mlxsw_sp *mlxsw_sp, 6622 struct mlxsw_sp_fib6_entry *fib6_entry) 6623 { 6624 struct mlxsw_sp_nexthop_group *nh_grp; 6625 int err; 6626 6627 nh_grp = kzalloc(sizeof(*nh_grp), GFP_KERNEL); 6628 if (!nh_grp) 6629 return ERR_PTR(-ENOMEM); 6630 INIT_LIST_HEAD(&nh_grp->vr_list); 6631 err = rhashtable_init(&nh_grp->vr_ht, 6632 &mlxsw_sp_nexthop_group_vr_ht_params); 6633 if (err) 6634 goto err_nexthop_group_vr_ht_init; 6635 INIT_LIST_HEAD(&nh_grp->fib_list); 6636 nh_grp->type = MLXSW_SP_NEXTHOP_GROUP_TYPE_IPV6; 6637 6638 err = mlxsw_sp_nexthop6_group_info_init(mlxsw_sp, nh_grp, fib6_entry); 6639 if (err) 6640 goto err_nexthop_group_info_init; 6641 6642 err = mlxsw_sp_nexthop_group_insert(mlxsw_sp, nh_grp); 6643 if (err) 6644 goto err_nexthop_group_insert; 6645 6646 nh_grp->can_destroy = true; 6647 6648 return nh_grp; 6649 6650 err_nexthop_group_insert: 6651 mlxsw_sp_nexthop6_group_info_fini(mlxsw_sp, nh_grp); 6652 err_nexthop_group_info_init: 6653 rhashtable_destroy(&nh_grp->vr_ht); 6654 err_nexthop_group_vr_ht_init: 6655 kfree(nh_grp); 6656 return ERR_PTR(err); 6657 } 6658 6659 static void 6660 mlxsw_sp_nexthop6_group_destroy(struct mlxsw_sp *mlxsw_sp, 6661 struct mlxsw_sp_nexthop_group *nh_grp) 6662 { 6663 if (!nh_grp->can_destroy) 6664 return; 6665 mlxsw_sp_nexthop_group_remove(mlxsw_sp, nh_grp); 6666 mlxsw_sp_nexthop6_group_info_fini(mlxsw_sp, nh_grp); 6667 WARN_ON_ONCE(!list_empty(&nh_grp->vr_list)); 6668 rhashtable_destroy(&nh_grp->vr_ht); 6669 kfree(nh_grp); 6670 } 6671 6672 static int mlxsw_sp_nexthop6_group_get(struct mlxsw_sp *mlxsw_sp, 6673 struct mlxsw_sp_fib6_entry *fib6_entry) 6674 { 6675 struct fib6_info *rt = mlxsw_sp_fib6_entry_rt(fib6_entry); 6676 struct mlxsw_sp_nexthop_group *nh_grp; 6677 6678 if (rt->nh) { 6679 nh_grp = mlxsw_sp_nexthop_obj_group_lookup(mlxsw_sp, 6680 rt->nh->id); 6681 if (WARN_ON_ONCE(!nh_grp)) 6682 return -EINVAL; 6683 goto out; 6684 } 6685 6686 nh_grp = mlxsw_sp_nexthop6_group_lookup(mlxsw_sp, fib6_entry); 6687 if (!nh_grp) { 6688 nh_grp = mlxsw_sp_nexthop6_group_create(mlxsw_sp, fib6_entry); 6689 if (IS_ERR(nh_grp)) 6690 return PTR_ERR(nh_grp); 6691 } 6692 6693 /* The route and the nexthop are described by the same struct, so we 6694 * need to the update the nexthop offload indication for the new route. 6695 */ 6696 __mlxsw_sp_nexthop6_group_offload_refresh(nh_grp, fib6_entry); 6697 6698 out: 6699 list_add_tail(&fib6_entry->common.nexthop_group_node, 6700 &nh_grp->fib_list); 6701 fib6_entry->common.nh_group = nh_grp; 6702 6703 return 0; 6704 } 6705 6706 static void mlxsw_sp_nexthop6_group_put(struct mlxsw_sp *mlxsw_sp, 6707 struct mlxsw_sp_fib_entry *fib_entry) 6708 { 6709 struct mlxsw_sp_nexthop_group *nh_grp = fib_entry->nh_group; 6710 6711 list_del(&fib_entry->nexthop_group_node); 6712 if (!list_empty(&nh_grp->fib_list)) 6713 return; 6714 6715 if (nh_grp->type == MLXSW_SP_NEXTHOP_GROUP_TYPE_OBJ) { 6716 mlxsw_sp_nexthop_obj_group_destroy(mlxsw_sp, nh_grp); 6717 return; 6718 } 6719 6720 mlxsw_sp_nexthop6_group_destroy(mlxsw_sp, nh_grp); 6721 } 6722 6723 static int 6724 mlxsw_sp_nexthop6_group_update(struct mlxsw_sp *mlxsw_sp, 6725 struct mlxsw_sp_fib6_entry *fib6_entry) 6726 { 6727 struct mlxsw_sp_nexthop_group *old_nh_grp = fib6_entry->common.nh_group; 6728 struct mlxsw_sp_fib_node *fib_node = fib6_entry->common.fib_node; 6729 int err; 6730 6731 mlxsw_sp_nexthop_group_vr_unlink(old_nh_grp, fib_node->fib); 6732 fib6_entry->common.nh_group = NULL; 6733 list_del(&fib6_entry->common.nexthop_group_node); 6734 6735 err = mlxsw_sp_nexthop6_group_get(mlxsw_sp, fib6_entry); 6736 if (err) 6737 goto err_nexthop6_group_get; 6738 6739 err = mlxsw_sp_nexthop_group_vr_link(fib6_entry->common.nh_group, 6740 fib_node->fib); 6741 if (err) 6742 goto err_nexthop_group_vr_link; 6743 6744 /* In case this entry is offloaded, then the adjacency index 6745 * currently associated with it in the device's table is that 6746 * of the old group. Start using the new one instead. 6747 */ 6748 err = mlxsw_sp_fib_entry_update(mlxsw_sp, &fib6_entry->common); 6749 if (err) 6750 goto err_fib_entry_update; 6751 6752 if (list_empty(&old_nh_grp->fib_list)) 6753 mlxsw_sp_nexthop6_group_destroy(mlxsw_sp, old_nh_grp); 6754 6755 return 0; 6756 6757 err_fib_entry_update: 6758 mlxsw_sp_nexthop_group_vr_unlink(fib6_entry->common.nh_group, 6759 fib_node->fib); 6760 err_nexthop_group_vr_link: 6761 mlxsw_sp_nexthop6_group_put(mlxsw_sp, &fib6_entry->common); 6762 err_nexthop6_group_get: 6763 list_add_tail(&fib6_entry->common.nexthop_group_node, 6764 &old_nh_grp->fib_list); 6765 fib6_entry->common.nh_group = old_nh_grp; 6766 mlxsw_sp_nexthop_group_vr_link(old_nh_grp, fib_node->fib); 6767 return err; 6768 } 6769 6770 static int 6771 mlxsw_sp_fib6_entry_nexthop_add(struct mlxsw_sp *mlxsw_sp, 6772 struct mlxsw_sp_fib6_entry *fib6_entry, 6773 struct fib6_info **rt_arr, unsigned int nrt6) 6774 { 6775 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 6776 int err, i; 6777 6778 for (i = 0; i < nrt6; i++) { 6779 mlxsw_sp_rt6 = mlxsw_sp_rt6_create(rt_arr[i]); 6780 if (IS_ERR(mlxsw_sp_rt6)) { 6781 err = PTR_ERR(mlxsw_sp_rt6); 6782 goto err_rt6_unwind; 6783 } 6784 6785 list_add_tail(&mlxsw_sp_rt6->list, &fib6_entry->rt6_list); 6786 fib6_entry->nrt6++; 6787 } 6788 6789 err = mlxsw_sp_nexthop6_group_update(mlxsw_sp, fib6_entry); 6790 if (err) 6791 goto err_rt6_unwind; 6792 6793 return 0; 6794 6795 err_rt6_unwind: 6796 for (; i > 0; i--) { 6797 fib6_entry->nrt6--; 6798 mlxsw_sp_rt6 = list_last_entry(&fib6_entry->rt6_list, 6799 struct mlxsw_sp_rt6, list); 6800 list_del(&mlxsw_sp_rt6->list); 6801 mlxsw_sp_rt6_destroy(mlxsw_sp_rt6); 6802 } 6803 return err; 6804 } 6805 6806 static void 6807 mlxsw_sp_fib6_entry_nexthop_del(struct mlxsw_sp *mlxsw_sp, 6808 struct mlxsw_sp_fib6_entry *fib6_entry, 6809 struct fib6_info **rt_arr, unsigned int nrt6) 6810 { 6811 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 6812 int i; 6813 6814 for (i = 0; i < nrt6; i++) { 6815 mlxsw_sp_rt6 = mlxsw_sp_fib6_entry_rt_find(fib6_entry, 6816 rt_arr[i]); 6817 if (WARN_ON_ONCE(!mlxsw_sp_rt6)) 6818 continue; 6819 6820 fib6_entry->nrt6--; 6821 list_del(&mlxsw_sp_rt6->list); 6822 mlxsw_sp_rt6_destroy(mlxsw_sp_rt6); 6823 } 6824 6825 mlxsw_sp_nexthop6_group_update(mlxsw_sp, fib6_entry); 6826 } 6827 6828 static int 6829 mlxsw_sp_fib6_entry_type_set_local(struct mlxsw_sp *mlxsw_sp, 6830 struct mlxsw_sp_fib_entry *fib_entry, 6831 const struct fib6_info *rt) 6832 { 6833 struct mlxsw_sp_nexthop_group_info *nhgi = fib_entry->nh_group->nhgi; 6834 union mlxsw_sp_l3addr dip = { .addr6 = rt->fib6_dst.addr }; 6835 u32 tb_id = mlxsw_sp_fix_tb_id(rt->fib6_table->tb6_id); 6836 struct mlxsw_sp_router *router = mlxsw_sp->router; 6837 int ifindex = nhgi->nexthops[0].ifindex; 6838 struct mlxsw_sp_ipip_entry *ipip_entry; 6839 6840 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP; 6841 ipip_entry = mlxsw_sp_ipip_entry_find_by_decap(mlxsw_sp, ifindex, 6842 MLXSW_SP_L3_PROTO_IPV6, 6843 dip); 6844 6845 if (ipip_entry && ipip_entry->ol_dev->flags & IFF_UP) { 6846 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP; 6847 return mlxsw_sp_fib_entry_decap_init(mlxsw_sp, fib_entry, 6848 ipip_entry); 6849 } 6850 if (mlxsw_sp_router_nve_is_decap(mlxsw_sp, tb_id, 6851 MLXSW_SP_L3_PROTO_IPV6, &dip)) { 6852 u32 tunnel_index; 6853 6854 tunnel_index = router->nve_decap_config.tunnel_index; 6855 fib_entry->decap.tunnel_index = tunnel_index; 6856 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_NVE_DECAP; 6857 } 6858 6859 return 0; 6860 } 6861 6862 static int mlxsw_sp_fib6_entry_type_set(struct mlxsw_sp *mlxsw_sp, 6863 struct mlxsw_sp_fib_entry *fib_entry, 6864 const struct fib6_info *rt) 6865 { 6866 if (rt->fib6_flags & RTF_LOCAL) 6867 return mlxsw_sp_fib6_entry_type_set_local(mlxsw_sp, fib_entry, 6868 rt); 6869 if (rt->fib6_flags & RTF_ANYCAST) 6870 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP; 6871 else if (rt->fib6_type == RTN_BLACKHOLE) 6872 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_BLACKHOLE; 6873 else if (rt->fib6_flags & RTF_REJECT) 6874 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_UNREACHABLE; 6875 else if (fib_entry->nh_group->nhgi->gateway) 6876 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_REMOTE; 6877 else 6878 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_LOCAL; 6879 6880 return 0; 6881 } 6882 6883 static void 6884 mlxsw_sp_fib6_entry_rt_destroy_all(struct mlxsw_sp_fib6_entry *fib6_entry) 6885 { 6886 struct mlxsw_sp_rt6 *mlxsw_sp_rt6, *tmp; 6887 6888 list_for_each_entry_safe(mlxsw_sp_rt6, tmp, &fib6_entry->rt6_list, 6889 list) { 6890 fib6_entry->nrt6--; 6891 list_del(&mlxsw_sp_rt6->list); 6892 mlxsw_sp_rt6_destroy(mlxsw_sp_rt6); 6893 } 6894 } 6895 6896 static struct mlxsw_sp_fib6_entry * 6897 mlxsw_sp_fib6_entry_create(struct mlxsw_sp *mlxsw_sp, 6898 struct mlxsw_sp_fib_node *fib_node, 6899 struct fib6_info **rt_arr, unsigned int nrt6) 6900 { 6901 struct mlxsw_sp_fib6_entry *fib6_entry; 6902 struct mlxsw_sp_fib_entry *fib_entry; 6903 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 6904 int err, i; 6905 6906 fib6_entry = kzalloc(sizeof(*fib6_entry), GFP_KERNEL); 6907 if (!fib6_entry) 6908 return ERR_PTR(-ENOMEM); 6909 fib_entry = &fib6_entry->common; 6910 6911 INIT_LIST_HEAD(&fib6_entry->rt6_list); 6912 6913 for (i = 0; i < nrt6; i++) { 6914 mlxsw_sp_rt6 = mlxsw_sp_rt6_create(rt_arr[i]); 6915 if (IS_ERR(mlxsw_sp_rt6)) { 6916 err = PTR_ERR(mlxsw_sp_rt6); 6917 goto err_rt6_unwind; 6918 } 6919 list_add_tail(&mlxsw_sp_rt6->list, &fib6_entry->rt6_list); 6920 fib6_entry->nrt6++; 6921 } 6922 6923 err = mlxsw_sp_nexthop6_group_get(mlxsw_sp, fib6_entry); 6924 if (err) 6925 goto err_rt6_unwind; 6926 6927 err = mlxsw_sp_nexthop_group_vr_link(fib_entry->nh_group, 6928 fib_node->fib); 6929 if (err) 6930 goto err_nexthop_group_vr_link; 6931 6932 err = mlxsw_sp_fib6_entry_type_set(mlxsw_sp, fib_entry, rt_arr[0]); 6933 if (err) 6934 goto err_fib6_entry_type_set; 6935 6936 fib_entry->fib_node = fib_node; 6937 6938 return fib6_entry; 6939 6940 err_fib6_entry_type_set: 6941 mlxsw_sp_nexthop_group_vr_unlink(fib_entry->nh_group, fib_node->fib); 6942 err_nexthop_group_vr_link: 6943 mlxsw_sp_nexthop6_group_put(mlxsw_sp, fib_entry); 6944 err_rt6_unwind: 6945 for (; i > 0; i--) { 6946 fib6_entry->nrt6--; 6947 mlxsw_sp_rt6 = list_last_entry(&fib6_entry->rt6_list, 6948 struct mlxsw_sp_rt6, list); 6949 list_del(&mlxsw_sp_rt6->list); 6950 mlxsw_sp_rt6_destroy(mlxsw_sp_rt6); 6951 } 6952 kfree(fib6_entry); 6953 return ERR_PTR(err); 6954 } 6955 6956 static void 6957 mlxsw_sp_fib6_entry_type_unset(struct mlxsw_sp *mlxsw_sp, 6958 struct mlxsw_sp_fib6_entry *fib6_entry) 6959 { 6960 mlxsw_sp_fib_entry_type_unset(mlxsw_sp, &fib6_entry->common); 6961 } 6962 6963 static void mlxsw_sp_fib6_entry_destroy(struct mlxsw_sp *mlxsw_sp, 6964 struct mlxsw_sp_fib6_entry *fib6_entry) 6965 { 6966 struct mlxsw_sp_fib_node *fib_node = fib6_entry->common.fib_node; 6967 6968 mlxsw_sp_fib6_entry_type_unset(mlxsw_sp, fib6_entry); 6969 mlxsw_sp_nexthop_group_vr_unlink(fib6_entry->common.nh_group, 6970 fib_node->fib); 6971 mlxsw_sp_nexthop6_group_put(mlxsw_sp, &fib6_entry->common); 6972 mlxsw_sp_fib6_entry_rt_destroy_all(fib6_entry); 6973 WARN_ON(fib6_entry->nrt6); 6974 kfree(fib6_entry); 6975 } 6976 6977 static struct mlxsw_sp_fib6_entry * 6978 mlxsw_sp_fib6_entry_lookup(struct mlxsw_sp *mlxsw_sp, 6979 const struct fib6_info *rt) 6980 { 6981 struct mlxsw_sp_fib6_entry *fib6_entry; 6982 struct mlxsw_sp_fib_node *fib_node; 6983 struct mlxsw_sp_fib *fib; 6984 struct fib6_info *cmp_rt; 6985 struct mlxsw_sp_vr *vr; 6986 6987 vr = mlxsw_sp_vr_find(mlxsw_sp, rt->fib6_table->tb6_id); 6988 if (!vr) 6989 return NULL; 6990 fib = mlxsw_sp_vr_fib(vr, MLXSW_SP_L3_PROTO_IPV6); 6991 6992 fib_node = mlxsw_sp_fib_node_lookup(fib, &rt->fib6_dst.addr, 6993 sizeof(rt->fib6_dst.addr), 6994 rt->fib6_dst.plen); 6995 if (!fib_node) 6996 return NULL; 6997 6998 fib6_entry = container_of(fib_node->fib_entry, 6999 struct mlxsw_sp_fib6_entry, common); 7000 cmp_rt = mlxsw_sp_fib6_entry_rt(fib6_entry); 7001 if (rt->fib6_table->tb6_id == cmp_rt->fib6_table->tb6_id && 7002 rt->fib6_metric == cmp_rt->fib6_metric && 7003 mlxsw_sp_fib6_entry_rt_find(fib6_entry, rt)) 7004 return fib6_entry; 7005 7006 return NULL; 7007 } 7008 7009 static bool mlxsw_sp_fib6_allow_replace(struct mlxsw_sp_fib6_entry *fib6_entry) 7010 { 7011 struct mlxsw_sp_fib_node *fib_node = fib6_entry->common.fib_node; 7012 struct mlxsw_sp_fib6_entry *fib6_replaced; 7013 struct fib6_info *rt, *rt_replaced; 7014 7015 if (!fib_node->fib_entry) 7016 return true; 7017 7018 fib6_replaced = container_of(fib_node->fib_entry, 7019 struct mlxsw_sp_fib6_entry, 7020 common); 7021 rt = mlxsw_sp_fib6_entry_rt(fib6_entry); 7022 rt_replaced = mlxsw_sp_fib6_entry_rt(fib6_replaced); 7023 if (rt->fib6_table->tb6_id == RT_TABLE_MAIN && 7024 rt_replaced->fib6_table->tb6_id == RT_TABLE_LOCAL) 7025 return false; 7026 7027 return true; 7028 } 7029 7030 static int mlxsw_sp_router_fib6_replace(struct mlxsw_sp *mlxsw_sp, 7031 struct fib6_info **rt_arr, 7032 unsigned int nrt6) 7033 { 7034 struct mlxsw_sp_fib6_entry *fib6_entry, *fib6_replaced; 7035 struct mlxsw_sp_fib_entry *replaced; 7036 struct mlxsw_sp_fib_node *fib_node; 7037 struct fib6_info *rt = rt_arr[0]; 7038 int err; 7039 7040 if (rt->fib6_src.plen) 7041 return -EINVAL; 7042 7043 if (mlxsw_sp_fib6_rt_should_ignore(rt)) 7044 return 0; 7045 7046 if (rt->nh && !mlxsw_sp_nexthop_obj_group_lookup(mlxsw_sp, rt->nh->id)) 7047 return 0; 7048 7049 fib_node = mlxsw_sp_fib_node_get(mlxsw_sp, rt->fib6_table->tb6_id, 7050 &rt->fib6_dst.addr, 7051 sizeof(rt->fib6_dst.addr), 7052 rt->fib6_dst.plen, 7053 MLXSW_SP_L3_PROTO_IPV6); 7054 if (IS_ERR(fib_node)) 7055 return PTR_ERR(fib_node); 7056 7057 fib6_entry = mlxsw_sp_fib6_entry_create(mlxsw_sp, fib_node, rt_arr, 7058 nrt6); 7059 if (IS_ERR(fib6_entry)) { 7060 err = PTR_ERR(fib6_entry); 7061 goto err_fib6_entry_create; 7062 } 7063 7064 if (!mlxsw_sp_fib6_allow_replace(fib6_entry)) { 7065 mlxsw_sp_fib6_entry_destroy(mlxsw_sp, fib6_entry); 7066 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 7067 return 0; 7068 } 7069 7070 replaced = fib_node->fib_entry; 7071 err = mlxsw_sp_fib_node_entry_link(mlxsw_sp, &fib6_entry->common); 7072 if (err) 7073 goto err_fib_node_entry_link; 7074 7075 /* Nothing to replace */ 7076 if (!replaced) 7077 return 0; 7078 7079 mlxsw_sp_fib_entry_hw_flags_clear(mlxsw_sp, replaced); 7080 fib6_replaced = container_of(replaced, struct mlxsw_sp_fib6_entry, 7081 common); 7082 mlxsw_sp_fib6_entry_destroy(mlxsw_sp, fib6_replaced); 7083 7084 return 0; 7085 7086 err_fib_node_entry_link: 7087 fib_node->fib_entry = replaced; 7088 mlxsw_sp_fib6_entry_destroy(mlxsw_sp, fib6_entry); 7089 err_fib6_entry_create: 7090 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 7091 return err; 7092 } 7093 7094 static int mlxsw_sp_router_fib6_append(struct mlxsw_sp *mlxsw_sp, 7095 struct fib6_info **rt_arr, 7096 unsigned int nrt6) 7097 { 7098 struct mlxsw_sp_fib6_entry *fib6_entry; 7099 struct mlxsw_sp_fib_node *fib_node; 7100 struct fib6_info *rt = rt_arr[0]; 7101 int err; 7102 7103 if (rt->fib6_src.plen) 7104 return -EINVAL; 7105 7106 if (mlxsw_sp_fib6_rt_should_ignore(rt)) 7107 return 0; 7108 7109 fib_node = mlxsw_sp_fib_node_get(mlxsw_sp, rt->fib6_table->tb6_id, 7110 &rt->fib6_dst.addr, 7111 sizeof(rt->fib6_dst.addr), 7112 rt->fib6_dst.plen, 7113 MLXSW_SP_L3_PROTO_IPV6); 7114 if (IS_ERR(fib_node)) 7115 return PTR_ERR(fib_node); 7116 7117 if (WARN_ON_ONCE(!fib_node->fib_entry)) { 7118 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 7119 return -EINVAL; 7120 } 7121 7122 fib6_entry = container_of(fib_node->fib_entry, 7123 struct mlxsw_sp_fib6_entry, common); 7124 err = mlxsw_sp_fib6_entry_nexthop_add(mlxsw_sp, fib6_entry, rt_arr, 7125 nrt6); 7126 if (err) 7127 goto err_fib6_entry_nexthop_add; 7128 7129 return 0; 7130 7131 err_fib6_entry_nexthop_add: 7132 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 7133 return err; 7134 } 7135 7136 static void mlxsw_sp_router_fib6_del(struct mlxsw_sp *mlxsw_sp, 7137 struct fib6_info **rt_arr, 7138 unsigned int nrt6) 7139 { 7140 struct mlxsw_sp_fib6_entry *fib6_entry; 7141 struct mlxsw_sp_fib_node *fib_node; 7142 struct fib6_info *rt = rt_arr[0]; 7143 7144 if (mlxsw_sp_fib6_rt_should_ignore(rt)) 7145 return; 7146 7147 /* Multipath routes are first added to the FIB trie and only then 7148 * notified. If we vetoed the addition, we will get a delete 7149 * notification for a route we do not have. Therefore, do not warn if 7150 * route was not found. 7151 */ 7152 fib6_entry = mlxsw_sp_fib6_entry_lookup(mlxsw_sp, rt); 7153 if (!fib6_entry) 7154 return; 7155 7156 /* If not all the nexthops are deleted, then only reduce the nexthop 7157 * group. 7158 */ 7159 if (nrt6 != fib6_entry->nrt6) { 7160 mlxsw_sp_fib6_entry_nexthop_del(mlxsw_sp, fib6_entry, rt_arr, 7161 nrt6); 7162 return; 7163 } 7164 7165 fib_node = fib6_entry->common.fib_node; 7166 7167 mlxsw_sp_fib_node_entry_unlink(mlxsw_sp, &fib6_entry->common); 7168 mlxsw_sp_fib6_entry_destroy(mlxsw_sp, fib6_entry); 7169 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 7170 } 7171 7172 static struct mlxsw_sp_mr_table * 7173 mlxsw_sp_router_fibmr_family_to_table(struct mlxsw_sp_vr *vr, int family) 7174 { 7175 if (family == RTNL_FAMILY_IPMR) 7176 return vr->mr_table[MLXSW_SP_L3_PROTO_IPV4]; 7177 else 7178 return vr->mr_table[MLXSW_SP_L3_PROTO_IPV6]; 7179 } 7180 7181 static int mlxsw_sp_router_fibmr_add(struct mlxsw_sp *mlxsw_sp, 7182 struct mfc_entry_notifier_info *men_info, 7183 bool replace) 7184 { 7185 struct mlxsw_sp_mr_table *mrt; 7186 struct mlxsw_sp_vr *vr; 7187 7188 vr = mlxsw_sp_vr_get(mlxsw_sp, men_info->tb_id, NULL); 7189 if (IS_ERR(vr)) 7190 return PTR_ERR(vr); 7191 7192 mrt = mlxsw_sp_router_fibmr_family_to_table(vr, men_info->info.family); 7193 return mlxsw_sp_mr_route_add(mrt, men_info->mfc, replace); 7194 } 7195 7196 static void mlxsw_sp_router_fibmr_del(struct mlxsw_sp *mlxsw_sp, 7197 struct mfc_entry_notifier_info *men_info) 7198 { 7199 struct mlxsw_sp_mr_table *mrt; 7200 struct mlxsw_sp_vr *vr; 7201 7202 vr = mlxsw_sp_vr_find(mlxsw_sp, men_info->tb_id); 7203 if (WARN_ON(!vr)) 7204 return; 7205 7206 mrt = mlxsw_sp_router_fibmr_family_to_table(vr, men_info->info.family); 7207 mlxsw_sp_mr_route_del(mrt, men_info->mfc); 7208 mlxsw_sp_vr_put(mlxsw_sp, vr); 7209 } 7210 7211 static int 7212 mlxsw_sp_router_fibmr_vif_add(struct mlxsw_sp *mlxsw_sp, 7213 struct vif_entry_notifier_info *ven_info) 7214 { 7215 struct mlxsw_sp_mr_table *mrt; 7216 struct mlxsw_sp_rif *rif; 7217 struct mlxsw_sp_vr *vr; 7218 7219 vr = mlxsw_sp_vr_get(mlxsw_sp, ven_info->tb_id, NULL); 7220 if (IS_ERR(vr)) 7221 return PTR_ERR(vr); 7222 7223 mrt = mlxsw_sp_router_fibmr_family_to_table(vr, ven_info->info.family); 7224 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, ven_info->dev); 7225 return mlxsw_sp_mr_vif_add(mrt, ven_info->dev, 7226 ven_info->vif_index, 7227 ven_info->vif_flags, rif); 7228 } 7229 7230 static void 7231 mlxsw_sp_router_fibmr_vif_del(struct mlxsw_sp *mlxsw_sp, 7232 struct vif_entry_notifier_info *ven_info) 7233 { 7234 struct mlxsw_sp_mr_table *mrt; 7235 struct mlxsw_sp_vr *vr; 7236 7237 vr = mlxsw_sp_vr_find(mlxsw_sp, ven_info->tb_id); 7238 if (WARN_ON(!vr)) 7239 return; 7240 7241 mrt = mlxsw_sp_router_fibmr_family_to_table(vr, ven_info->info.family); 7242 mlxsw_sp_mr_vif_del(mrt, ven_info->vif_index); 7243 mlxsw_sp_vr_put(mlxsw_sp, vr); 7244 } 7245 7246 static void mlxsw_sp_fib4_node_flush(struct mlxsw_sp *mlxsw_sp, 7247 struct mlxsw_sp_fib_node *fib_node) 7248 { 7249 struct mlxsw_sp_fib4_entry *fib4_entry; 7250 7251 fib4_entry = container_of(fib_node->fib_entry, 7252 struct mlxsw_sp_fib4_entry, common); 7253 mlxsw_sp_fib_node_entry_unlink(mlxsw_sp, fib_node->fib_entry); 7254 mlxsw_sp_fib4_entry_destroy(mlxsw_sp, fib4_entry); 7255 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 7256 } 7257 7258 static void mlxsw_sp_fib6_node_flush(struct mlxsw_sp *mlxsw_sp, 7259 struct mlxsw_sp_fib_node *fib_node) 7260 { 7261 struct mlxsw_sp_fib6_entry *fib6_entry; 7262 7263 fib6_entry = container_of(fib_node->fib_entry, 7264 struct mlxsw_sp_fib6_entry, common); 7265 mlxsw_sp_fib_node_entry_unlink(mlxsw_sp, fib_node->fib_entry); 7266 mlxsw_sp_fib6_entry_destroy(mlxsw_sp, fib6_entry); 7267 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 7268 } 7269 7270 static void mlxsw_sp_fib_node_flush(struct mlxsw_sp *mlxsw_sp, 7271 struct mlxsw_sp_fib_node *fib_node) 7272 { 7273 switch (fib_node->fib->proto) { 7274 case MLXSW_SP_L3_PROTO_IPV4: 7275 mlxsw_sp_fib4_node_flush(mlxsw_sp, fib_node); 7276 break; 7277 case MLXSW_SP_L3_PROTO_IPV6: 7278 mlxsw_sp_fib6_node_flush(mlxsw_sp, fib_node); 7279 break; 7280 } 7281 } 7282 7283 static void mlxsw_sp_vr_fib_flush(struct mlxsw_sp *mlxsw_sp, 7284 struct mlxsw_sp_vr *vr, 7285 enum mlxsw_sp_l3proto proto) 7286 { 7287 struct mlxsw_sp_fib *fib = mlxsw_sp_vr_fib(vr, proto); 7288 struct mlxsw_sp_fib_node *fib_node, *tmp; 7289 7290 list_for_each_entry_safe(fib_node, tmp, &fib->node_list, list) { 7291 bool do_break = &tmp->list == &fib->node_list; 7292 7293 mlxsw_sp_fib_node_flush(mlxsw_sp, fib_node); 7294 if (do_break) 7295 break; 7296 } 7297 } 7298 7299 static void mlxsw_sp_router_fib_flush(struct mlxsw_sp *mlxsw_sp) 7300 { 7301 int i, j; 7302 7303 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); i++) { 7304 struct mlxsw_sp_vr *vr = &mlxsw_sp->router->vrs[i]; 7305 7306 if (!mlxsw_sp_vr_is_used(vr)) 7307 continue; 7308 7309 for (j = 0; j < MLXSW_SP_L3_PROTO_MAX; j++) 7310 mlxsw_sp_mr_table_flush(vr->mr_table[j]); 7311 mlxsw_sp_vr_fib_flush(mlxsw_sp, vr, MLXSW_SP_L3_PROTO_IPV4); 7312 7313 /* If virtual router was only used for IPv4, then it's no 7314 * longer used. 7315 */ 7316 if (!mlxsw_sp_vr_is_used(vr)) 7317 continue; 7318 mlxsw_sp_vr_fib_flush(mlxsw_sp, vr, MLXSW_SP_L3_PROTO_IPV6); 7319 } 7320 } 7321 7322 struct mlxsw_sp_fib6_event_work { 7323 struct fib6_info **rt_arr; 7324 unsigned int nrt6; 7325 }; 7326 7327 struct mlxsw_sp_fib_event_work { 7328 struct work_struct work; 7329 union { 7330 struct mlxsw_sp_fib6_event_work fib6_work; 7331 struct fib_entry_notifier_info fen_info; 7332 struct fib_rule_notifier_info fr_info; 7333 struct fib_nh_notifier_info fnh_info; 7334 struct mfc_entry_notifier_info men_info; 7335 struct vif_entry_notifier_info ven_info; 7336 }; 7337 struct mlxsw_sp *mlxsw_sp; 7338 unsigned long event; 7339 }; 7340 7341 static int 7342 mlxsw_sp_router_fib6_work_init(struct mlxsw_sp_fib6_event_work *fib6_work, 7343 struct fib6_entry_notifier_info *fen6_info) 7344 { 7345 struct fib6_info *rt = fen6_info->rt; 7346 struct fib6_info **rt_arr; 7347 struct fib6_info *iter; 7348 unsigned int nrt6; 7349 int i = 0; 7350 7351 nrt6 = fen6_info->nsiblings + 1; 7352 7353 rt_arr = kcalloc(nrt6, sizeof(struct fib6_info *), GFP_ATOMIC); 7354 if (!rt_arr) 7355 return -ENOMEM; 7356 7357 fib6_work->rt_arr = rt_arr; 7358 fib6_work->nrt6 = nrt6; 7359 7360 rt_arr[0] = rt; 7361 fib6_info_hold(rt); 7362 7363 if (!fen6_info->nsiblings) 7364 return 0; 7365 7366 list_for_each_entry(iter, &rt->fib6_siblings, fib6_siblings) { 7367 if (i == fen6_info->nsiblings) 7368 break; 7369 7370 rt_arr[i + 1] = iter; 7371 fib6_info_hold(iter); 7372 i++; 7373 } 7374 WARN_ON_ONCE(i != fen6_info->nsiblings); 7375 7376 return 0; 7377 } 7378 7379 static void 7380 mlxsw_sp_router_fib6_work_fini(struct mlxsw_sp_fib6_event_work *fib6_work) 7381 { 7382 int i; 7383 7384 for (i = 0; i < fib6_work->nrt6; i++) 7385 mlxsw_sp_rt6_release(fib6_work->rt_arr[i]); 7386 kfree(fib6_work->rt_arr); 7387 } 7388 7389 static void mlxsw_sp_router_fib4_event_work(struct work_struct *work) 7390 { 7391 struct mlxsw_sp_fib_event_work *fib_work = 7392 container_of(work, struct mlxsw_sp_fib_event_work, work); 7393 struct mlxsw_sp *mlxsw_sp = fib_work->mlxsw_sp; 7394 int err; 7395 7396 mutex_lock(&mlxsw_sp->router->lock); 7397 mlxsw_sp_span_respin(mlxsw_sp); 7398 7399 switch (fib_work->event) { 7400 case FIB_EVENT_ENTRY_REPLACE: 7401 err = mlxsw_sp_router_fib4_replace(mlxsw_sp, 7402 &fib_work->fen_info); 7403 if (err) { 7404 dev_warn(mlxsw_sp->bus_info->dev, "FIB replace failed.\n"); 7405 mlxsw_sp_fib4_offload_failed_flag_set(mlxsw_sp, 7406 &fib_work->fen_info); 7407 } 7408 fib_info_put(fib_work->fen_info.fi); 7409 break; 7410 case FIB_EVENT_ENTRY_DEL: 7411 mlxsw_sp_router_fib4_del(mlxsw_sp, &fib_work->fen_info); 7412 fib_info_put(fib_work->fen_info.fi); 7413 break; 7414 case FIB_EVENT_NH_ADD: 7415 case FIB_EVENT_NH_DEL: 7416 mlxsw_sp_nexthop4_event(mlxsw_sp, fib_work->event, 7417 fib_work->fnh_info.fib_nh); 7418 fib_info_put(fib_work->fnh_info.fib_nh->nh_parent); 7419 break; 7420 } 7421 mutex_unlock(&mlxsw_sp->router->lock); 7422 kfree(fib_work); 7423 } 7424 7425 static void mlxsw_sp_router_fib6_event_work(struct work_struct *work) 7426 { 7427 struct mlxsw_sp_fib_event_work *fib_work = 7428 container_of(work, struct mlxsw_sp_fib_event_work, work); 7429 struct mlxsw_sp_fib6_event_work *fib6_work = &fib_work->fib6_work; 7430 struct mlxsw_sp *mlxsw_sp = fib_work->mlxsw_sp; 7431 int err; 7432 7433 mutex_lock(&mlxsw_sp->router->lock); 7434 mlxsw_sp_span_respin(mlxsw_sp); 7435 7436 switch (fib_work->event) { 7437 case FIB_EVENT_ENTRY_REPLACE: 7438 err = mlxsw_sp_router_fib6_replace(mlxsw_sp, 7439 fib6_work->rt_arr, 7440 fib6_work->nrt6); 7441 if (err) { 7442 dev_warn(mlxsw_sp->bus_info->dev, "FIB replace failed.\n"); 7443 mlxsw_sp_fib6_offload_failed_flag_set(mlxsw_sp, 7444 fib6_work->rt_arr, 7445 fib6_work->nrt6); 7446 } 7447 mlxsw_sp_router_fib6_work_fini(fib6_work); 7448 break; 7449 case FIB_EVENT_ENTRY_APPEND: 7450 err = mlxsw_sp_router_fib6_append(mlxsw_sp, 7451 fib6_work->rt_arr, 7452 fib6_work->nrt6); 7453 if (err) { 7454 dev_warn(mlxsw_sp->bus_info->dev, "FIB append failed.\n"); 7455 mlxsw_sp_fib6_offload_failed_flag_set(mlxsw_sp, 7456 fib6_work->rt_arr, 7457 fib6_work->nrt6); 7458 } 7459 mlxsw_sp_router_fib6_work_fini(fib6_work); 7460 break; 7461 case FIB_EVENT_ENTRY_DEL: 7462 mlxsw_sp_router_fib6_del(mlxsw_sp, 7463 fib6_work->rt_arr, 7464 fib6_work->nrt6); 7465 mlxsw_sp_router_fib6_work_fini(fib6_work); 7466 break; 7467 } 7468 mutex_unlock(&mlxsw_sp->router->lock); 7469 kfree(fib_work); 7470 } 7471 7472 static void mlxsw_sp_router_fibmr_event_work(struct work_struct *work) 7473 { 7474 struct mlxsw_sp_fib_event_work *fib_work = 7475 container_of(work, struct mlxsw_sp_fib_event_work, work); 7476 struct mlxsw_sp *mlxsw_sp = fib_work->mlxsw_sp; 7477 bool replace; 7478 int err; 7479 7480 rtnl_lock(); 7481 mutex_lock(&mlxsw_sp->router->lock); 7482 switch (fib_work->event) { 7483 case FIB_EVENT_ENTRY_REPLACE: 7484 case FIB_EVENT_ENTRY_ADD: 7485 replace = fib_work->event == FIB_EVENT_ENTRY_REPLACE; 7486 7487 err = mlxsw_sp_router_fibmr_add(mlxsw_sp, &fib_work->men_info, 7488 replace); 7489 if (err) 7490 dev_warn(mlxsw_sp->bus_info->dev, "MR entry add failed.\n"); 7491 mr_cache_put(fib_work->men_info.mfc); 7492 break; 7493 case FIB_EVENT_ENTRY_DEL: 7494 mlxsw_sp_router_fibmr_del(mlxsw_sp, &fib_work->men_info); 7495 mr_cache_put(fib_work->men_info.mfc); 7496 break; 7497 case FIB_EVENT_VIF_ADD: 7498 err = mlxsw_sp_router_fibmr_vif_add(mlxsw_sp, 7499 &fib_work->ven_info); 7500 if (err) 7501 dev_warn(mlxsw_sp->bus_info->dev, "MR VIF add failed.\n"); 7502 dev_put(fib_work->ven_info.dev); 7503 break; 7504 case FIB_EVENT_VIF_DEL: 7505 mlxsw_sp_router_fibmr_vif_del(mlxsw_sp, 7506 &fib_work->ven_info); 7507 dev_put(fib_work->ven_info.dev); 7508 break; 7509 } 7510 mutex_unlock(&mlxsw_sp->router->lock); 7511 rtnl_unlock(); 7512 kfree(fib_work); 7513 } 7514 7515 static void mlxsw_sp_router_fib4_event(struct mlxsw_sp_fib_event_work *fib_work, 7516 struct fib_notifier_info *info) 7517 { 7518 struct fib_entry_notifier_info *fen_info; 7519 struct fib_nh_notifier_info *fnh_info; 7520 7521 switch (fib_work->event) { 7522 case FIB_EVENT_ENTRY_REPLACE: 7523 case FIB_EVENT_ENTRY_DEL: 7524 fen_info = container_of(info, struct fib_entry_notifier_info, 7525 info); 7526 fib_work->fen_info = *fen_info; 7527 /* Take reference on fib_info to prevent it from being 7528 * freed while work is queued. Release it afterwards. 7529 */ 7530 fib_info_hold(fib_work->fen_info.fi); 7531 break; 7532 case FIB_EVENT_NH_ADD: 7533 case FIB_EVENT_NH_DEL: 7534 fnh_info = container_of(info, struct fib_nh_notifier_info, 7535 info); 7536 fib_work->fnh_info = *fnh_info; 7537 fib_info_hold(fib_work->fnh_info.fib_nh->nh_parent); 7538 break; 7539 } 7540 } 7541 7542 static int mlxsw_sp_router_fib6_event(struct mlxsw_sp_fib_event_work *fib_work, 7543 struct fib_notifier_info *info) 7544 { 7545 struct fib6_entry_notifier_info *fen6_info; 7546 int err; 7547 7548 switch (fib_work->event) { 7549 case FIB_EVENT_ENTRY_REPLACE: 7550 case FIB_EVENT_ENTRY_APPEND: 7551 case FIB_EVENT_ENTRY_DEL: 7552 fen6_info = container_of(info, struct fib6_entry_notifier_info, 7553 info); 7554 err = mlxsw_sp_router_fib6_work_init(&fib_work->fib6_work, 7555 fen6_info); 7556 if (err) 7557 return err; 7558 break; 7559 } 7560 7561 return 0; 7562 } 7563 7564 static void 7565 mlxsw_sp_router_fibmr_event(struct mlxsw_sp_fib_event_work *fib_work, 7566 struct fib_notifier_info *info) 7567 { 7568 switch (fib_work->event) { 7569 case FIB_EVENT_ENTRY_REPLACE: 7570 case FIB_EVENT_ENTRY_ADD: 7571 case FIB_EVENT_ENTRY_DEL: 7572 memcpy(&fib_work->men_info, info, sizeof(fib_work->men_info)); 7573 mr_cache_hold(fib_work->men_info.mfc); 7574 break; 7575 case FIB_EVENT_VIF_ADD: 7576 case FIB_EVENT_VIF_DEL: 7577 memcpy(&fib_work->ven_info, info, sizeof(fib_work->ven_info)); 7578 dev_hold(fib_work->ven_info.dev); 7579 break; 7580 } 7581 } 7582 7583 static int mlxsw_sp_router_fib_rule_event(unsigned long event, 7584 struct fib_notifier_info *info, 7585 struct mlxsw_sp *mlxsw_sp) 7586 { 7587 struct netlink_ext_ack *extack = info->extack; 7588 struct fib_rule_notifier_info *fr_info; 7589 struct fib_rule *rule; 7590 int err = 0; 7591 7592 /* nothing to do at the moment */ 7593 if (event == FIB_EVENT_RULE_DEL) 7594 return 0; 7595 7596 fr_info = container_of(info, struct fib_rule_notifier_info, info); 7597 rule = fr_info->rule; 7598 7599 /* Rule only affects locally generated traffic */ 7600 if (rule->iifindex == mlxsw_sp_net(mlxsw_sp)->loopback_dev->ifindex) 7601 return 0; 7602 7603 switch (info->family) { 7604 case AF_INET: 7605 if (!fib4_rule_default(rule) && !rule->l3mdev) 7606 err = -EOPNOTSUPP; 7607 break; 7608 case AF_INET6: 7609 if (!fib6_rule_default(rule) && !rule->l3mdev) 7610 err = -EOPNOTSUPP; 7611 break; 7612 case RTNL_FAMILY_IPMR: 7613 if (!ipmr_rule_default(rule) && !rule->l3mdev) 7614 err = -EOPNOTSUPP; 7615 break; 7616 case RTNL_FAMILY_IP6MR: 7617 if (!ip6mr_rule_default(rule) && !rule->l3mdev) 7618 err = -EOPNOTSUPP; 7619 break; 7620 } 7621 7622 if (err < 0) 7623 NL_SET_ERR_MSG_MOD(extack, "FIB rules not supported"); 7624 7625 return err; 7626 } 7627 7628 /* Called with rcu_read_lock() */ 7629 static int mlxsw_sp_router_fib_event(struct notifier_block *nb, 7630 unsigned long event, void *ptr) 7631 { 7632 struct mlxsw_sp_fib_event_work *fib_work; 7633 struct fib_notifier_info *info = ptr; 7634 struct mlxsw_sp_router *router; 7635 int err; 7636 7637 if ((info->family != AF_INET && info->family != AF_INET6 && 7638 info->family != RTNL_FAMILY_IPMR && 7639 info->family != RTNL_FAMILY_IP6MR)) 7640 return NOTIFY_DONE; 7641 7642 router = container_of(nb, struct mlxsw_sp_router, fib_nb); 7643 7644 switch (event) { 7645 case FIB_EVENT_RULE_ADD: 7646 case FIB_EVENT_RULE_DEL: 7647 err = mlxsw_sp_router_fib_rule_event(event, info, 7648 router->mlxsw_sp); 7649 return notifier_from_errno(err); 7650 case FIB_EVENT_ENTRY_ADD: 7651 case FIB_EVENT_ENTRY_REPLACE: 7652 case FIB_EVENT_ENTRY_APPEND: 7653 if (info->family == AF_INET) { 7654 struct fib_entry_notifier_info *fen_info = ptr; 7655 7656 if (fen_info->fi->fib_nh_is_v6) { 7657 NL_SET_ERR_MSG_MOD(info->extack, "IPv6 gateway with IPv4 route is not supported"); 7658 return notifier_from_errno(-EINVAL); 7659 } 7660 } 7661 break; 7662 } 7663 7664 fib_work = kzalloc(sizeof(*fib_work), GFP_ATOMIC); 7665 if (!fib_work) 7666 return NOTIFY_BAD; 7667 7668 fib_work->mlxsw_sp = router->mlxsw_sp; 7669 fib_work->event = event; 7670 7671 switch (info->family) { 7672 case AF_INET: 7673 INIT_WORK(&fib_work->work, mlxsw_sp_router_fib4_event_work); 7674 mlxsw_sp_router_fib4_event(fib_work, info); 7675 break; 7676 case AF_INET6: 7677 INIT_WORK(&fib_work->work, mlxsw_sp_router_fib6_event_work); 7678 err = mlxsw_sp_router_fib6_event(fib_work, info); 7679 if (err) 7680 goto err_fib_event; 7681 break; 7682 case RTNL_FAMILY_IP6MR: 7683 case RTNL_FAMILY_IPMR: 7684 INIT_WORK(&fib_work->work, mlxsw_sp_router_fibmr_event_work); 7685 mlxsw_sp_router_fibmr_event(fib_work, info); 7686 break; 7687 } 7688 7689 mlxsw_core_schedule_work(&fib_work->work); 7690 7691 return NOTIFY_DONE; 7692 7693 err_fib_event: 7694 kfree(fib_work); 7695 return NOTIFY_BAD; 7696 } 7697 7698 static struct mlxsw_sp_rif * 7699 mlxsw_sp_rif_find_by_dev(const struct mlxsw_sp *mlxsw_sp, 7700 const struct net_device *dev) 7701 { 7702 int i; 7703 7704 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS); i++) 7705 if (mlxsw_sp->router->rifs[i] && 7706 mlxsw_sp->router->rifs[i]->dev == dev) 7707 return mlxsw_sp->router->rifs[i]; 7708 7709 return NULL; 7710 } 7711 7712 bool mlxsw_sp_rif_exists(struct mlxsw_sp *mlxsw_sp, 7713 const struct net_device *dev) 7714 { 7715 struct mlxsw_sp_rif *rif; 7716 7717 mutex_lock(&mlxsw_sp->router->lock); 7718 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); 7719 mutex_unlock(&mlxsw_sp->router->lock); 7720 7721 return rif; 7722 } 7723 7724 u16 mlxsw_sp_rif_vid(struct mlxsw_sp *mlxsw_sp, const struct net_device *dev) 7725 { 7726 struct mlxsw_sp_rif *rif; 7727 u16 vid = 0; 7728 7729 mutex_lock(&mlxsw_sp->router->lock); 7730 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); 7731 if (!rif) 7732 goto out; 7733 7734 /* We only return the VID for VLAN RIFs. Otherwise we return an 7735 * invalid value (0). 7736 */ 7737 if (rif->ops->type != MLXSW_SP_RIF_TYPE_VLAN) 7738 goto out; 7739 7740 vid = mlxsw_sp_fid_8021q_vid(rif->fid); 7741 7742 out: 7743 mutex_unlock(&mlxsw_sp->router->lock); 7744 return vid; 7745 } 7746 7747 static int mlxsw_sp_router_rif_disable(struct mlxsw_sp *mlxsw_sp, u16 rif) 7748 { 7749 char ritr_pl[MLXSW_REG_RITR_LEN]; 7750 int err; 7751 7752 mlxsw_reg_ritr_rif_pack(ritr_pl, rif); 7753 err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 7754 if (err) 7755 return err; 7756 7757 mlxsw_reg_ritr_enable_set(ritr_pl, false); 7758 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 7759 } 7760 7761 static void mlxsw_sp_router_rif_gone_sync(struct mlxsw_sp *mlxsw_sp, 7762 struct mlxsw_sp_rif *rif) 7763 { 7764 mlxsw_sp_router_rif_disable(mlxsw_sp, rif->rif_index); 7765 mlxsw_sp_nexthop_rif_gone_sync(mlxsw_sp, rif); 7766 mlxsw_sp_neigh_rif_gone_sync(mlxsw_sp, rif); 7767 } 7768 7769 static bool 7770 mlxsw_sp_rif_should_config(struct mlxsw_sp_rif *rif, struct net_device *dev, 7771 unsigned long event) 7772 { 7773 struct inet6_dev *inet6_dev; 7774 bool addr_list_empty = true; 7775 struct in_device *idev; 7776 7777 switch (event) { 7778 case NETDEV_UP: 7779 return rif == NULL; 7780 case NETDEV_DOWN: 7781 rcu_read_lock(); 7782 idev = __in_dev_get_rcu(dev); 7783 if (idev && idev->ifa_list) 7784 addr_list_empty = false; 7785 7786 inet6_dev = __in6_dev_get(dev); 7787 if (addr_list_empty && inet6_dev && 7788 !list_empty(&inet6_dev->addr_list)) 7789 addr_list_empty = false; 7790 rcu_read_unlock(); 7791 7792 /* macvlans do not have a RIF, but rather piggy back on the 7793 * RIF of their lower device. 7794 */ 7795 if (netif_is_macvlan(dev) && addr_list_empty) 7796 return true; 7797 7798 if (rif && addr_list_empty && 7799 !netif_is_l3_slave(rif->dev)) 7800 return true; 7801 /* It is possible we already removed the RIF ourselves 7802 * if it was assigned to a netdev that is now a bridge 7803 * or LAG slave. 7804 */ 7805 return false; 7806 } 7807 7808 return false; 7809 } 7810 7811 static enum mlxsw_sp_rif_type 7812 mlxsw_sp_dev_rif_type(const struct mlxsw_sp *mlxsw_sp, 7813 const struct net_device *dev) 7814 { 7815 enum mlxsw_sp_fid_type type; 7816 7817 if (mlxsw_sp_netdev_ipip_type(mlxsw_sp, dev, NULL)) 7818 return MLXSW_SP_RIF_TYPE_IPIP_LB; 7819 7820 /* Otherwise RIF type is derived from the type of the underlying FID. */ 7821 if (is_vlan_dev(dev) && netif_is_bridge_master(vlan_dev_real_dev(dev))) 7822 type = MLXSW_SP_FID_TYPE_8021Q; 7823 else if (netif_is_bridge_master(dev) && br_vlan_enabled(dev)) 7824 type = MLXSW_SP_FID_TYPE_8021Q; 7825 else if (netif_is_bridge_master(dev)) 7826 type = MLXSW_SP_FID_TYPE_8021D; 7827 else 7828 type = MLXSW_SP_FID_TYPE_RFID; 7829 7830 return mlxsw_sp_fid_type_rif_type(mlxsw_sp, type); 7831 } 7832 7833 static int mlxsw_sp_rif_index_alloc(struct mlxsw_sp *mlxsw_sp, u16 *p_rif_index, 7834 u8 rif_entries) 7835 { 7836 *p_rif_index = gen_pool_alloc(mlxsw_sp->router->rifs_table, 7837 rif_entries); 7838 if (*p_rif_index == 0) 7839 return -ENOBUFS; 7840 *p_rif_index -= MLXSW_SP_ROUTER_GENALLOC_OFFSET; 7841 7842 /* RIF indexes must be aligned to the allocation size. */ 7843 WARN_ON_ONCE(*p_rif_index % rif_entries); 7844 7845 return 0; 7846 } 7847 7848 static void mlxsw_sp_rif_index_free(struct mlxsw_sp *mlxsw_sp, u16 rif_index, 7849 u8 rif_entries) 7850 { 7851 gen_pool_free(mlxsw_sp->router->rifs_table, 7852 MLXSW_SP_ROUTER_GENALLOC_OFFSET + rif_index, rif_entries); 7853 } 7854 7855 static struct mlxsw_sp_rif *mlxsw_sp_rif_alloc(size_t rif_size, u16 rif_index, 7856 u16 vr_id, 7857 struct net_device *l3_dev) 7858 { 7859 struct mlxsw_sp_rif *rif; 7860 7861 rif = kzalloc(rif_size, GFP_KERNEL); 7862 if (!rif) 7863 return NULL; 7864 7865 INIT_LIST_HEAD(&rif->nexthop_list); 7866 INIT_LIST_HEAD(&rif->neigh_list); 7867 if (l3_dev) { 7868 ether_addr_copy(rif->addr, l3_dev->dev_addr); 7869 rif->mtu = l3_dev->mtu; 7870 rif->dev = l3_dev; 7871 } 7872 rif->vr_id = vr_id; 7873 rif->rif_index = rif_index; 7874 7875 return rif; 7876 } 7877 7878 struct mlxsw_sp_rif *mlxsw_sp_rif_by_index(const struct mlxsw_sp *mlxsw_sp, 7879 u16 rif_index) 7880 { 7881 return mlxsw_sp->router->rifs[rif_index]; 7882 } 7883 7884 u16 mlxsw_sp_rif_index(const struct mlxsw_sp_rif *rif) 7885 { 7886 return rif->rif_index; 7887 } 7888 7889 u16 mlxsw_sp_ipip_lb_rif_index(const struct mlxsw_sp_rif_ipip_lb *lb_rif) 7890 { 7891 return lb_rif->common.rif_index; 7892 } 7893 7894 u16 mlxsw_sp_ipip_lb_ul_vr_id(const struct mlxsw_sp_rif_ipip_lb *lb_rif) 7895 { 7896 u32 ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(lb_rif->common.dev); 7897 struct mlxsw_sp_vr *ul_vr; 7898 7899 ul_vr = mlxsw_sp_vr_get(lb_rif->common.mlxsw_sp, ul_tb_id, NULL); 7900 if (WARN_ON(IS_ERR(ul_vr))) 7901 return 0; 7902 7903 return ul_vr->id; 7904 } 7905 7906 u16 mlxsw_sp_ipip_lb_ul_rif_id(const struct mlxsw_sp_rif_ipip_lb *lb_rif) 7907 { 7908 return lb_rif->ul_rif_id; 7909 } 7910 7911 static bool 7912 mlxsw_sp_router_port_l3_stats_enabled(struct mlxsw_sp_rif *rif) 7913 { 7914 return mlxsw_sp_rif_counter_valid_get(rif, 7915 MLXSW_SP_RIF_COUNTER_EGRESS) && 7916 mlxsw_sp_rif_counter_valid_get(rif, 7917 MLXSW_SP_RIF_COUNTER_INGRESS); 7918 } 7919 7920 static int 7921 mlxsw_sp_router_port_l3_stats_enable(struct mlxsw_sp_rif *rif) 7922 { 7923 int err; 7924 7925 err = mlxsw_sp_rif_counter_alloc(rif, MLXSW_SP_RIF_COUNTER_INGRESS); 7926 if (err) 7927 return err; 7928 7929 /* Clear stale data. */ 7930 err = mlxsw_sp_rif_counter_fetch_clear(rif, 7931 MLXSW_SP_RIF_COUNTER_INGRESS, 7932 NULL); 7933 if (err) 7934 goto err_clear_ingress; 7935 7936 err = mlxsw_sp_rif_counter_alloc(rif, MLXSW_SP_RIF_COUNTER_EGRESS); 7937 if (err) 7938 goto err_alloc_egress; 7939 7940 /* Clear stale data. */ 7941 err = mlxsw_sp_rif_counter_fetch_clear(rif, 7942 MLXSW_SP_RIF_COUNTER_EGRESS, 7943 NULL); 7944 if (err) 7945 goto err_clear_egress; 7946 7947 return 0; 7948 7949 err_clear_egress: 7950 mlxsw_sp_rif_counter_free(rif, MLXSW_SP_RIF_COUNTER_EGRESS); 7951 err_alloc_egress: 7952 err_clear_ingress: 7953 mlxsw_sp_rif_counter_free(rif, MLXSW_SP_RIF_COUNTER_INGRESS); 7954 return err; 7955 } 7956 7957 static void 7958 mlxsw_sp_router_port_l3_stats_disable(struct mlxsw_sp_rif *rif) 7959 { 7960 mlxsw_sp_rif_counter_free(rif, MLXSW_SP_RIF_COUNTER_EGRESS); 7961 mlxsw_sp_rif_counter_free(rif, MLXSW_SP_RIF_COUNTER_INGRESS); 7962 } 7963 7964 static void 7965 mlxsw_sp_router_port_l3_stats_report_used(struct mlxsw_sp_rif *rif, 7966 struct netdev_notifier_offload_xstats_info *info) 7967 { 7968 if (!mlxsw_sp_router_port_l3_stats_enabled(rif)) 7969 return; 7970 netdev_offload_xstats_report_used(info->report_used); 7971 } 7972 7973 static int 7974 mlxsw_sp_router_port_l3_stats_fetch(struct mlxsw_sp_rif *rif, 7975 struct rtnl_hw_stats64 *p_stats) 7976 { 7977 struct mlxsw_sp_rif_counter_set_basic ingress; 7978 struct mlxsw_sp_rif_counter_set_basic egress; 7979 int err; 7980 7981 err = mlxsw_sp_rif_counter_fetch_clear(rif, 7982 MLXSW_SP_RIF_COUNTER_INGRESS, 7983 &ingress); 7984 if (err) 7985 return err; 7986 7987 err = mlxsw_sp_rif_counter_fetch_clear(rif, 7988 MLXSW_SP_RIF_COUNTER_EGRESS, 7989 &egress); 7990 if (err) 7991 return err; 7992 7993 #define MLXSW_SP_ROUTER_ALL_GOOD(SET, SFX) \ 7994 ((SET.good_unicast_ ## SFX) + \ 7995 (SET.good_multicast_ ## SFX) + \ 7996 (SET.good_broadcast_ ## SFX)) 7997 7998 p_stats->rx_packets = MLXSW_SP_ROUTER_ALL_GOOD(ingress, packets); 7999 p_stats->tx_packets = MLXSW_SP_ROUTER_ALL_GOOD(egress, packets); 8000 p_stats->rx_bytes = MLXSW_SP_ROUTER_ALL_GOOD(ingress, bytes); 8001 p_stats->tx_bytes = MLXSW_SP_ROUTER_ALL_GOOD(egress, bytes); 8002 p_stats->rx_errors = ingress.error_packets; 8003 p_stats->tx_errors = egress.error_packets; 8004 p_stats->rx_dropped = ingress.discard_packets; 8005 p_stats->tx_dropped = egress.discard_packets; 8006 p_stats->multicast = ingress.good_multicast_packets + 8007 ingress.good_broadcast_packets; 8008 8009 #undef MLXSW_SP_ROUTER_ALL_GOOD 8010 8011 return 0; 8012 } 8013 8014 static int 8015 mlxsw_sp_router_port_l3_stats_report_delta(struct mlxsw_sp_rif *rif, 8016 struct netdev_notifier_offload_xstats_info *info) 8017 { 8018 struct rtnl_hw_stats64 stats = {}; 8019 int err; 8020 8021 if (!mlxsw_sp_router_port_l3_stats_enabled(rif)) 8022 return 0; 8023 8024 err = mlxsw_sp_router_port_l3_stats_fetch(rif, &stats); 8025 if (err) 8026 return err; 8027 8028 netdev_offload_xstats_report_delta(info->report_delta, &stats); 8029 return 0; 8030 } 8031 8032 struct mlxsw_sp_router_hwstats_notify_work { 8033 struct work_struct work; 8034 struct net_device *dev; 8035 }; 8036 8037 static void mlxsw_sp_router_hwstats_notify_work(struct work_struct *work) 8038 { 8039 struct mlxsw_sp_router_hwstats_notify_work *hws_work = 8040 container_of(work, struct mlxsw_sp_router_hwstats_notify_work, 8041 work); 8042 8043 rtnl_lock(); 8044 rtnl_offload_xstats_notify(hws_work->dev); 8045 rtnl_unlock(); 8046 dev_put(hws_work->dev); 8047 kfree(hws_work); 8048 } 8049 8050 static void 8051 mlxsw_sp_router_hwstats_notify_schedule(struct net_device *dev) 8052 { 8053 struct mlxsw_sp_router_hwstats_notify_work *hws_work; 8054 8055 /* To collect notification payload, the core ends up sending another 8056 * notifier block message, which would deadlock on the attempt to 8057 * acquire the router lock again. Just postpone the notification until 8058 * later. 8059 */ 8060 8061 hws_work = kzalloc(sizeof(*hws_work), GFP_KERNEL); 8062 if (!hws_work) 8063 return; 8064 8065 INIT_WORK(&hws_work->work, mlxsw_sp_router_hwstats_notify_work); 8066 dev_hold(dev); 8067 hws_work->dev = dev; 8068 mlxsw_core_schedule_work(&hws_work->work); 8069 } 8070 8071 int mlxsw_sp_rif_dev_ifindex(const struct mlxsw_sp_rif *rif) 8072 { 8073 return rif->dev->ifindex; 8074 } 8075 8076 const struct net_device *mlxsw_sp_rif_dev(const struct mlxsw_sp_rif *rif) 8077 { 8078 return rif->dev; 8079 } 8080 8081 static void mlxsw_sp_rif_push_l3_stats(struct mlxsw_sp_rif *rif) 8082 { 8083 struct rtnl_hw_stats64 stats = {}; 8084 8085 if (!mlxsw_sp_router_port_l3_stats_fetch(rif, &stats)) 8086 netdev_offload_xstats_push_delta(rif->dev, 8087 NETDEV_OFFLOAD_XSTATS_TYPE_L3, 8088 &stats); 8089 } 8090 8091 static struct mlxsw_sp_rif * 8092 mlxsw_sp_rif_create(struct mlxsw_sp *mlxsw_sp, 8093 const struct mlxsw_sp_rif_params *params, 8094 struct netlink_ext_ack *extack) 8095 { 8096 u8 rif_entries = params->double_entry ? 2 : 1; 8097 u32 tb_id = l3mdev_fib_table(params->dev); 8098 const struct mlxsw_sp_rif_ops *ops; 8099 struct mlxsw_sp_fid *fid = NULL; 8100 enum mlxsw_sp_rif_type type; 8101 struct mlxsw_sp_rif *rif; 8102 struct mlxsw_sp_vr *vr; 8103 u16 rif_index; 8104 int i, err; 8105 8106 type = mlxsw_sp_dev_rif_type(mlxsw_sp, params->dev); 8107 ops = mlxsw_sp->router->rif_ops_arr[type]; 8108 8109 vr = mlxsw_sp_vr_get(mlxsw_sp, tb_id ? : RT_TABLE_MAIN, extack); 8110 if (IS_ERR(vr)) 8111 return ERR_CAST(vr); 8112 vr->rif_count++; 8113 8114 err = mlxsw_sp_rif_index_alloc(mlxsw_sp, &rif_index, rif_entries); 8115 if (err) { 8116 NL_SET_ERR_MSG_MOD(extack, "Exceeded number of supported router interfaces"); 8117 goto err_rif_index_alloc; 8118 } 8119 8120 rif = mlxsw_sp_rif_alloc(ops->rif_size, rif_index, vr->id, params->dev); 8121 if (!rif) { 8122 err = -ENOMEM; 8123 goto err_rif_alloc; 8124 } 8125 dev_hold(rif->dev); 8126 mlxsw_sp->router->rifs[rif_index] = rif; 8127 rif->mlxsw_sp = mlxsw_sp; 8128 rif->ops = ops; 8129 rif->rif_entries = rif_entries; 8130 8131 if (ops->fid_get) { 8132 fid = ops->fid_get(rif, extack); 8133 if (IS_ERR(fid)) { 8134 err = PTR_ERR(fid); 8135 goto err_fid_get; 8136 } 8137 rif->fid = fid; 8138 } 8139 8140 if (ops->setup) 8141 ops->setup(rif, params); 8142 8143 err = ops->configure(rif, extack); 8144 if (err) 8145 goto err_configure; 8146 8147 for (i = 0; i < MLXSW_SP_L3_PROTO_MAX; i++) { 8148 err = mlxsw_sp_mr_rif_add(vr->mr_table[i], rif); 8149 if (err) 8150 goto err_mr_rif_add; 8151 } 8152 8153 if (netdev_offload_xstats_enabled(rif->dev, 8154 NETDEV_OFFLOAD_XSTATS_TYPE_L3)) { 8155 err = mlxsw_sp_router_port_l3_stats_enable(rif); 8156 if (err) 8157 goto err_stats_enable; 8158 mlxsw_sp_router_hwstats_notify_schedule(rif->dev); 8159 } else { 8160 mlxsw_sp_rif_counters_alloc(rif); 8161 } 8162 8163 atomic_add(rif_entries, &mlxsw_sp->router->rifs_count); 8164 return rif; 8165 8166 err_stats_enable: 8167 err_mr_rif_add: 8168 for (i--; i >= 0; i--) 8169 mlxsw_sp_mr_rif_del(vr->mr_table[i], rif); 8170 ops->deconfigure(rif); 8171 err_configure: 8172 if (fid) 8173 mlxsw_sp_fid_put(fid); 8174 err_fid_get: 8175 mlxsw_sp->router->rifs[rif_index] = NULL; 8176 dev_put(rif->dev); 8177 kfree(rif); 8178 err_rif_alloc: 8179 mlxsw_sp_rif_index_free(mlxsw_sp, rif_index, rif_entries); 8180 err_rif_index_alloc: 8181 vr->rif_count--; 8182 mlxsw_sp_vr_put(mlxsw_sp, vr); 8183 return ERR_PTR(err); 8184 } 8185 8186 static void mlxsw_sp_rif_destroy(struct mlxsw_sp_rif *rif) 8187 { 8188 const struct mlxsw_sp_rif_ops *ops = rif->ops; 8189 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 8190 struct mlxsw_sp_fid *fid = rif->fid; 8191 u8 rif_entries = rif->rif_entries; 8192 u16 rif_index = rif->rif_index; 8193 struct mlxsw_sp_vr *vr; 8194 int i; 8195 8196 atomic_sub(rif_entries, &mlxsw_sp->router->rifs_count); 8197 mlxsw_sp_router_rif_gone_sync(mlxsw_sp, rif); 8198 vr = &mlxsw_sp->router->vrs[rif->vr_id]; 8199 8200 if (netdev_offload_xstats_enabled(rif->dev, 8201 NETDEV_OFFLOAD_XSTATS_TYPE_L3)) { 8202 mlxsw_sp_rif_push_l3_stats(rif); 8203 mlxsw_sp_router_port_l3_stats_disable(rif); 8204 mlxsw_sp_router_hwstats_notify_schedule(rif->dev); 8205 } else { 8206 mlxsw_sp_rif_counters_free(rif); 8207 } 8208 8209 for (i = 0; i < MLXSW_SP_L3_PROTO_MAX; i++) 8210 mlxsw_sp_mr_rif_del(vr->mr_table[i], rif); 8211 ops->deconfigure(rif); 8212 if (fid) 8213 /* Loopback RIFs are not associated with a FID. */ 8214 mlxsw_sp_fid_put(fid); 8215 mlxsw_sp->router->rifs[rif->rif_index] = NULL; 8216 dev_put(rif->dev); 8217 kfree(rif); 8218 mlxsw_sp_rif_index_free(mlxsw_sp, rif_index, rif_entries); 8219 vr->rif_count--; 8220 mlxsw_sp_vr_put(mlxsw_sp, vr); 8221 } 8222 8223 void mlxsw_sp_rif_destroy_by_dev(struct mlxsw_sp *mlxsw_sp, 8224 struct net_device *dev) 8225 { 8226 struct mlxsw_sp_rif *rif; 8227 8228 mutex_lock(&mlxsw_sp->router->lock); 8229 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); 8230 if (!rif) 8231 goto out; 8232 mlxsw_sp_rif_destroy(rif); 8233 out: 8234 mutex_unlock(&mlxsw_sp->router->lock); 8235 } 8236 8237 static void 8238 mlxsw_sp_rif_subport_params_init(struct mlxsw_sp_rif_params *params, 8239 struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan) 8240 { 8241 struct mlxsw_sp_port *mlxsw_sp_port = mlxsw_sp_port_vlan->mlxsw_sp_port; 8242 8243 params->vid = mlxsw_sp_port_vlan->vid; 8244 params->lag = mlxsw_sp_port->lagged; 8245 if (params->lag) 8246 params->lag_id = mlxsw_sp_port->lag_id; 8247 else 8248 params->system_port = mlxsw_sp_port->local_port; 8249 } 8250 8251 static struct mlxsw_sp_rif_subport * 8252 mlxsw_sp_rif_subport_rif(const struct mlxsw_sp_rif *rif) 8253 { 8254 return container_of(rif, struct mlxsw_sp_rif_subport, common); 8255 } 8256 8257 static struct mlxsw_sp_rif * 8258 mlxsw_sp_rif_subport_get(struct mlxsw_sp *mlxsw_sp, 8259 const struct mlxsw_sp_rif_params *params, 8260 struct netlink_ext_ack *extack) 8261 { 8262 struct mlxsw_sp_rif_subport *rif_subport; 8263 struct mlxsw_sp_rif *rif; 8264 8265 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, params->dev); 8266 if (!rif) 8267 return mlxsw_sp_rif_create(mlxsw_sp, params, extack); 8268 8269 rif_subport = mlxsw_sp_rif_subport_rif(rif); 8270 refcount_inc(&rif_subport->ref_count); 8271 return rif; 8272 } 8273 8274 static void mlxsw_sp_rif_subport_put(struct mlxsw_sp_rif *rif) 8275 { 8276 struct mlxsw_sp_rif_subport *rif_subport; 8277 8278 rif_subport = mlxsw_sp_rif_subport_rif(rif); 8279 if (!refcount_dec_and_test(&rif_subport->ref_count)) 8280 return; 8281 8282 mlxsw_sp_rif_destroy(rif); 8283 } 8284 8285 static int mlxsw_sp_rif_mac_profile_index_alloc(struct mlxsw_sp *mlxsw_sp, 8286 struct mlxsw_sp_rif_mac_profile *profile, 8287 struct netlink_ext_ack *extack) 8288 { 8289 u8 max_rif_mac_profiles = mlxsw_sp->router->max_rif_mac_profile; 8290 struct mlxsw_sp_router *router = mlxsw_sp->router; 8291 int id; 8292 8293 id = idr_alloc(&router->rif_mac_profiles_idr, profile, 0, 8294 max_rif_mac_profiles, GFP_KERNEL); 8295 8296 if (id >= 0) { 8297 profile->id = id; 8298 return 0; 8299 } 8300 8301 if (id == -ENOSPC) 8302 NL_SET_ERR_MSG_MOD(extack, 8303 "Exceeded number of supported router interface MAC profiles"); 8304 8305 return id; 8306 } 8307 8308 static struct mlxsw_sp_rif_mac_profile * 8309 mlxsw_sp_rif_mac_profile_index_free(struct mlxsw_sp *mlxsw_sp, u8 mac_profile) 8310 { 8311 struct mlxsw_sp_rif_mac_profile *profile; 8312 8313 profile = idr_remove(&mlxsw_sp->router->rif_mac_profiles_idr, 8314 mac_profile); 8315 WARN_ON(!profile); 8316 return profile; 8317 } 8318 8319 static struct mlxsw_sp_rif_mac_profile * 8320 mlxsw_sp_rif_mac_profile_alloc(const char *mac) 8321 { 8322 struct mlxsw_sp_rif_mac_profile *profile; 8323 8324 profile = kzalloc(sizeof(*profile), GFP_KERNEL); 8325 if (!profile) 8326 return NULL; 8327 8328 ether_addr_copy(profile->mac_prefix, mac); 8329 refcount_set(&profile->ref_count, 1); 8330 return profile; 8331 } 8332 8333 static struct mlxsw_sp_rif_mac_profile * 8334 mlxsw_sp_rif_mac_profile_find(const struct mlxsw_sp *mlxsw_sp, const char *mac) 8335 { 8336 struct mlxsw_sp_router *router = mlxsw_sp->router; 8337 struct mlxsw_sp_rif_mac_profile *profile; 8338 int id; 8339 8340 idr_for_each_entry(&router->rif_mac_profiles_idr, profile, id) { 8341 if (ether_addr_equal_masked(profile->mac_prefix, mac, 8342 mlxsw_sp->mac_mask)) 8343 return profile; 8344 } 8345 8346 return NULL; 8347 } 8348 8349 static u64 mlxsw_sp_rif_mac_profiles_occ_get(void *priv) 8350 { 8351 const struct mlxsw_sp *mlxsw_sp = priv; 8352 8353 return atomic_read(&mlxsw_sp->router->rif_mac_profiles_count); 8354 } 8355 8356 static u64 mlxsw_sp_rifs_occ_get(void *priv) 8357 { 8358 const struct mlxsw_sp *mlxsw_sp = priv; 8359 8360 return atomic_read(&mlxsw_sp->router->rifs_count); 8361 } 8362 8363 static struct mlxsw_sp_rif_mac_profile * 8364 mlxsw_sp_rif_mac_profile_create(struct mlxsw_sp *mlxsw_sp, const char *mac, 8365 struct netlink_ext_ack *extack) 8366 { 8367 struct mlxsw_sp_rif_mac_profile *profile; 8368 int err; 8369 8370 profile = mlxsw_sp_rif_mac_profile_alloc(mac); 8371 if (!profile) 8372 return ERR_PTR(-ENOMEM); 8373 8374 err = mlxsw_sp_rif_mac_profile_index_alloc(mlxsw_sp, profile, extack); 8375 if (err) 8376 goto profile_index_alloc_err; 8377 8378 atomic_inc(&mlxsw_sp->router->rif_mac_profiles_count); 8379 return profile; 8380 8381 profile_index_alloc_err: 8382 kfree(profile); 8383 return ERR_PTR(err); 8384 } 8385 8386 static void mlxsw_sp_rif_mac_profile_destroy(struct mlxsw_sp *mlxsw_sp, 8387 u8 mac_profile) 8388 { 8389 struct mlxsw_sp_rif_mac_profile *profile; 8390 8391 atomic_dec(&mlxsw_sp->router->rif_mac_profiles_count); 8392 profile = mlxsw_sp_rif_mac_profile_index_free(mlxsw_sp, mac_profile); 8393 kfree(profile); 8394 } 8395 8396 static int mlxsw_sp_rif_mac_profile_get(struct mlxsw_sp *mlxsw_sp, 8397 const char *mac, u8 *p_mac_profile, 8398 struct netlink_ext_ack *extack) 8399 { 8400 struct mlxsw_sp_rif_mac_profile *profile; 8401 8402 profile = mlxsw_sp_rif_mac_profile_find(mlxsw_sp, mac); 8403 if (profile) { 8404 refcount_inc(&profile->ref_count); 8405 goto out; 8406 } 8407 8408 profile = mlxsw_sp_rif_mac_profile_create(mlxsw_sp, mac, extack); 8409 if (IS_ERR(profile)) 8410 return PTR_ERR(profile); 8411 8412 out: 8413 *p_mac_profile = profile->id; 8414 return 0; 8415 } 8416 8417 static void mlxsw_sp_rif_mac_profile_put(struct mlxsw_sp *mlxsw_sp, 8418 u8 mac_profile) 8419 { 8420 struct mlxsw_sp_rif_mac_profile *profile; 8421 8422 profile = idr_find(&mlxsw_sp->router->rif_mac_profiles_idr, 8423 mac_profile); 8424 if (WARN_ON(!profile)) 8425 return; 8426 8427 if (!refcount_dec_and_test(&profile->ref_count)) 8428 return; 8429 8430 mlxsw_sp_rif_mac_profile_destroy(mlxsw_sp, mac_profile); 8431 } 8432 8433 static bool mlxsw_sp_rif_mac_profile_is_shared(const struct mlxsw_sp_rif *rif) 8434 { 8435 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 8436 struct mlxsw_sp_rif_mac_profile *profile; 8437 8438 profile = idr_find(&mlxsw_sp->router->rif_mac_profiles_idr, 8439 rif->mac_profile_id); 8440 if (WARN_ON(!profile)) 8441 return false; 8442 8443 return refcount_read(&profile->ref_count) > 1; 8444 } 8445 8446 static int mlxsw_sp_rif_mac_profile_edit(struct mlxsw_sp_rif *rif, 8447 const char *new_mac) 8448 { 8449 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 8450 struct mlxsw_sp_rif_mac_profile *profile; 8451 8452 profile = idr_find(&mlxsw_sp->router->rif_mac_profiles_idr, 8453 rif->mac_profile_id); 8454 if (WARN_ON(!profile)) 8455 return -EINVAL; 8456 8457 ether_addr_copy(profile->mac_prefix, new_mac); 8458 return 0; 8459 } 8460 8461 static int 8462 mlxsw_sp_rif_mac_profile_replace(struct mlxsw_sp *mlxsw_sp, 8463 struct mlxsw_sp_rif *rif, 8464 const char *new_mac, 8465 struct netlink_ext_ack *extack) 8466 { 8467 u8 mac_profile; 8468 int err; 8469 8470 if (!mlxsw_sp_rif_mac_profile_is_shared(rif) && 8471 !mlxsw_sp_rif_mac_profile_find(mlxsw_sp, new_mac)) 8472 return mlxsw_sp_rif_mac_profile_edit(rif, new_mac); 8473 8474 err = mlxsw_sp_rif_mac_profile_get(mlxsw_sp, new_mac, 8475 &mac_profile, extack); 8476 if (err) 8477 return err; 8478 8479 mlxsw_sp_rif_mac_profile_put(mlxsw_sp, rif->mac_profile_id); 8480 rif->mac_profile_id = mac_profile; 8481 return 0; 8482 } 8483 8484 static int 8485 __mlxsw_sp_port_vlan_router_join(struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan, 8486 struct net_device *l3_dev, 8487 struct netlink_ext_ack *extack) 8488 { 8489 struct mlxsw_sp_port *mlxsw_sp_port = mlxsw_sp_port_vlan->mlxsw_sp_port; 8490 struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp; 8491 struct mlxsw_sp_rif_params params = { 8492 .dev = l3_dev, 8493 }; 8494 u16 vid = mlxsw_sp_port_vlan->vid; 8495 struct mlxsw_sp_rif *rif; 8496 struct mlxsw_sp_fid *fid; 8497 int err; 8498 8499 mlxsw_sp_rif_subport_params_init(¶ms, mlxsw_sp_port_vlan); 8500 rif = mlxsw_sp_rif_subport_get(mlxsw_sp, ¶ms, extack); 8501 if (IS_ERR(rif)) 8502 return PTR_ERR(rif); 8503 8504 /* FID was already created, just take a reference */ 8505 fid = rif->ops->fid_get(rif, extack); 8506 err = mlxsw_sp_fid_port_vid_map(fid, mlxsw_sp_port, vid); 8507 if (err) 8508 goto err_fid_port_vid_map; 8509 8510 err = mlxsw_sp_port_vid_learning_set(mlxsw_sp_port, vid, false); 8511 if (err) 8512 goto err_port_vid_learning_set; 8513 8514 err = mlxsw_sp_port_vid_stp_set(mlxsw_sp_port, vid, 8515 BR_STATE_FORWARDING); 8516 if (err) 8517 goto err_port_vid_stp_set; 8518 8519 mlxsw_sp_port_vlan->fid = fid; 8520 8521 return 0; 8522 8523 err_port_vid_stp_set: 8524 mlxsw_sp_port_vid_learning_set(mlxsw_sp_port, vid, true); 8525 err_port_vid_learning_set: 8526 mlxsw_sp_fid_port_vid_unmap(fid, mlxsw_sp_port, vid); 8527 err_fid_port_vid_map: 8528 mlxsw_sp_fid_put(fid); 8529 mlxsw_sp_rif_subport_put(rif); 8530 return err; 8531 } 8532 8533 static void 8534 __mlxsw_sp_port_vlan_router_leave(struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan) 8535 { 8536 struct mlxsw_sp_port *mlxsw_sp_port = mlxsw_sp_port_vlan->mlxsw_sp_port; 8537 struct mlxsw_sp_fid *fid = mlxsw_sp_port_vlan->fid; 8538 struct mlxsw_sp_rif *rif = mlxsw_sp_fid_rif(fid); 8539 u16 vid = mlxsw_sp_port_vlan->vid; 8540 8541 if (WARN_ON(mlxsw_sp_fid_type(fid) != MLXSW_SP_FID_TYPE_RFID)) 8542 return; 8543 8544 mlxsw_sp_port_vlan->fid = NULL; 8545 mlxsw_sp_port_vid_stp_set(mlxsw_sp_port, vid, BR_STATE_BLOCKING); 8546 mlxsw_sp_port_vid_learning_set(mlxsw_sp_port, vid, true); 8547 mlxsw_sp_fid_port_vid_unmap(fid, mlxsw_sp_port, vid); 8548 mlxsw_sp_fid_put(fid); 8549 mlxsw_sp_rif_subport_put(rif); 8550 } 8551 8552 int 8553 mlxsw_sp_port_vlan_router_join(struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan, 8554 struct net_device *l3_dev, 8555 struct netlink_ext_ack *extack) 8556 { 8557 struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port_vlan->mlxsw_sp_port->mlxsw_sp; 8558 struct mlxsw_sp_rif *rif; 8559 int err = 0; 8560 8561 mutex_lock(&mlxsw_sp->router->lock); 8562 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, l3_dev); 8563 if (!rif) 8564 goto out; 8565 8566 err = __mlxsw_sp_port_vlan_router_join(mlxsw_sp_port_vlan, l3_dev, 8567 extack); 8568 out: 8569 mutex_unlock(&mlxsw_sp->router->lock); 8570 return err; 8571 } 8572 8573 void 8574 mlxsw_sp_port_vlan_router_leave(struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan) 8575 { 8576 struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port_vlan->mlxsw_sp_port->mlxsw_sp; 8577 8578 mutex_lock(&mlxsw_sp->router->lock); 8579 __mlxsw_sp_port_vlan_router_leave(mlxsw_sp_port_vlan); 8580 mutex_unlock(&mlxsw_sp->router->lock); 8581 } 8582 8583 static int mlxsw_sp_inetaddr_port_vlan_event(struct net_device *l3_dev, 8584 struct net_device *port_dev, 8585 unsigned long event, u16 vid, 8586 struct netlink_ext_ack *extack) 8587 { 8588 struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(port_dev); 8589 struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan; 8590 8591 mlxsw_sp_port_vlan = mlxsw_sp_port_vlan_find_by_vid(mlxsw_sp_port, vid); 8592 if (WARN_ON(!mlxsw_sp_port_vlan)) 8593 return -EINVAL; 8594 8595 switch (event) { 8596 case NETDEV_UP: 8597 return __mlxsw_sp_port_vlan_router_join(mlxsw_sp_port_vlan, 8598 l3_dev, extack); 8599 case NETDEV_DOWN: 8600 __mlxsw_sp_port_vlan_router_leave(mlxsw_sp_port_vlan); 8601 break; 8602 } 8603 8604 return 0; 8605 } 8606 8607 static int mlxsw_sp_inetaddr_port_event(struct net_device *port_dev, 8608 unsigned long event, 8609 struct netlink_ext_ack *extack) 8610 { 8611 if (netif_is_any_bridge_port(port_dev) || netif_is_lag_port(port_dev)) 8612 return 0; 8613 8614 return mlxsw_sp_inetaddr_port_vlan_event(port_dev, port_dev, event, 8615 MLXSW_SP_DEFAULT_VID, extack); 8616 } 8617 8618 static int __mlxsw_sp_inetaddr_lag_event(struct net_device *l3_dev, 8619 struct net_device *lag_dev, 8620 unsigned long event, u16 vid, 8621 struct netlink_ext_ack *extack) 8622 { 8623 struct net_device *port_dev; 8624 struct list_head *iter; 8625 int err; 8626 8627 netdev_for_each_lower_dev(lag_dev, port_dev, iter) { 8628 if (mlxsw_sp_port_dev_check(port_dev)) { 8629 err = mlxsw_sp_inetaddr_port_vlan_event(l3_dev, 8630 port_dev, 8631 event, vid, 8632 extack); 8633 if (err) 8634 return err; 8635 } 8636 } 8637 8638 return 0; 8639 } 8640 8641 static int mlxsw_sp_inetaddr_lag_event(struct net_device *lag_dev, 8642 unsigned long event, 8643 struct netlink_ext_ack *extack) 8644 { 8645 if (netif_is_bridge_port(lag_dev)) 8646 return 0; 8647 8648 return __mlxsw_sp_inetaddr_lag_event(lag_dev, lag_dev, event, 8649 MLXSW_SP_DEFAULT_VID, extack); 8650 } 8651 8652 static int mlxsw_sp_inetaddr_bridge_event(struct mlxsw_sp *mlxsw_sp, 8653 struct net_device *l3_dev, 8654 unsigned long event, 8655 struct netlink_ext_ack *extack) 8656 { 8657 struct mlxsw_sp_rif_params params = { 8658 .dev = l3_dev, 8659 }; 8660 struct mlxsw_sp_rif *rif; 8661 8662 switch (event) { 8663 case NETDEV_UP: 8664 if (netif_is_bridge_master(l3_dev) && br_vlan_enabled(l3_dev)) { 8665 u16 proto; 8666 8667 br_vlan_get_proto(l3_dev, &proto); 8668 if (proto == ETH_P_8021AD) { 8669 NL_SET_ERR_MSG_MOD(extack, "Adding an IP address to 802.1ad bridge is not supported"); 8670 return -EOPNOTSUPP; 8671 } 8672 } 8673 rif = mlxsw_sp_rif_create(mlxsw_sp, ¶ms, extack); 8674 if (IS_ERR(rif)) 8675 return PTR_ERR(rif); 8676 break; 8677 case NETDEV_DOWN: 8678 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, l3_dev); 8679 mlxsw_sp_rif_destroy(rif); 8680 break; 8681 } 8682 8683 return 0; 8684 } 8685 8686 static int mlxsw_sp_inetaddr_vlan_event(struct mlxsw_sp *mlxsw_sp, 8687 struct net_device *vlan_dev, 8688 unsigned long event, 8689 struct netlink_ext_ack *extack) 8690 { 8691 struct net_device *real_dev = vlan_dev_real_dev(vlan_dev); 8692 u16 vid = vlan_dev_vlan_id(vlan_dev); 8693 8694 if (netif_is_bridge_port(vlan_dev)) 8695 return 0; 8696 8697 if (mlxsw_sp_port_dev_check(real_dev)) 8698 return mlxsw_sp_inetaddr_port_vlan_event(vlan_dev, real_dev, 8699 event, vid, extack); 8700 else if (netif_is_lag_master(real_dev)) 8701 return __mlxsw_sp_inetaddr_lag_event(vlan_dev, real_dev, event, 8702 vid, extack); 8703 else if (netif_is_bridge_master(real_dev) && br_vlan_enabled(real_dev)) 8704 return mlxsw_sp_inetaddr_bridge_event(mlxsw_sp, vlan_dev, event, 8705 extack); 8706 8707 return 0; 8708 } 8709 8710 static bool mlxsw_sp_rif_macvlan_is_vrrp4(const u8 *mac) 8711 { 8712 u8 vrrp4[ETH_ALEN] = { 0x00, 0x00, 0x5e, 0x00, 0x01, 0x00 }; 8713 u8 mask[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 }; 8714 8715 return ether_addr_equal_masked(mac, vrrp4, mask); 8716 } 8717 8718 static bool mlxsw_sp_rif_macvlan_is_vrrp6(const u8 *mac) 8719 { 8720 u8 vrrp6[ETH_ALEN] = { 0x00, 0x00, 0x5e, 0x00, 0x02, 0x00 }; 8721 u8 mask[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 }; 8722 8723 return ether_addr_equal_masked(mac, vrrp6, mask); 8724 } 8725 8726 static int mlxsw_sp_rif_vrrp_op(struct mlxsw_sp *mlxsw_sp, u16 rif_index, 8727 const u8 *mac, bool adding) 8728 { 8729 char ritr_pl[MLXSW_REG_RITR_LEN]; 8730 u8 vrrp_id = adding ? mac[5] : 0; 8731 int err; 8732 8733 if (!mlxsw_sp_rif_macvlan_is_vrrp4(mac) && 8734 !mlxsw_sp_rif_macvlan_is_vrrp6(mac)) 8735 return 0; 8736 8737 mlxsw_reg_ritr_rif_pack(ritr_pl, rif_index); 8738 err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 8739 if (err) 8740 return err; 8741 8742 if (mlxsw_sp_rif_macvlan_is_vrrp4(mac)) 8743 mlxsw_reg_ritr_if_vrrp_id_ipv4_set(ritr_pl, vrrp_id); 8744 else 8745 mlxsw_reg_ritr_if_vrrp_id_ipv6_set(ritr_pl, vrrp_id); 8746 8747 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 8748 } 8749 8750 static int mlxsw_sp_rif_macvlan_add(struct mlxsw_sp *mlxsw_sp, 8751 const struct net_device *macvlan_dev, 8752 struct netlink_ext_ack *extack) 8753 { 8754 struct macvlan_dev *vlan = netdev_priv(macvlan_dev); 8755 struct mlxsw_sp_rif *rif; 8756 int err; 8757 8758 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, vlan->lowerdev); 8759 if (!rif) { 8760 NL_SET_ERR_MSG_MOD(extack, "macvlan is only supported on top of router interfaces"); 8761 return -EOPNOTSUPP; 8762 } 8763 8764 err = mlxsw_sp_rif_fdb_op(mlxsw_sp, macvlan_dev->dev_addr, 8765 mlxsw_sp_fid_index(rif->fid), true); 8766 if (err) 8767 return err; 8768 8769 err = mlxsw_sp_rif_vrrp_op(mlxsw_sp, rif->rif_index, 8770 macvlan_dev->dev_addr, true); 8771 if (err) 8772 goto err_rif_vrrp_add; 8773 8774 /* Make sure the bridge driver does not have this MAC pointing at 8775 * some other port. 8776 */ 8777 if (rif->ops->fdb_del) 8778 rif->ops->fdb_del(rif, macvlan_dev->dev_addr); 8779 8780 return 0; 8781 8782 err_rif_vrrp_add: 8783 mlxsw_sp_rif_fdb_op(mlxsw_sp, macvlan_dev->dev_addr, 8784 mlxsw_sp_fid_index(rif->fid), false); 8785 return err; 8786 } 8787 8788 static void __mlxsw_sp_rif_macvlan_del(struct mlxsw_sp *mlxsw_sp, 8789 const struct net_device *macvlan_dev) 8790 { 8791 struct macvlan_dev *vlan = netdev_priv(macvlan_dev); 8792 struct mlxsw_sp_rif *rif; 8793 8794 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, vlan->lowerdev); 8795 /* If we do not have a RIF, then we already took care of 8796 * removing the macvlan's MAC during RIF deletion. 8797 */ 8798 if (!rif) 8799 return; 8800 mlxsw_sp_rif_vrrp_op(mlxsw_sp, rif->rif_index, macvlan_dev->dev_addr, 8801 false); 8802 mlxsw_sp_rif_fdb_op(mlxsw_sp, macvlan_dev->dev_addr, 8803 mlxsw_sp_fid_index(rif->fid), false); 8804 } 8805 8806 void mlxsw_sp_rif_macvlan_del(struct mlxsw_sp *mlxsw_sp, 8807 const struct net_device *macvlan_dev) 8808 { 8809 mutex_lock(&mlxsw_sp->router->lock); 8810 __mlxsw_sp_rif_macvlan_del(mlxsw_sp, macvlan_dev); 8811 mutex_unlock(&mlxsw_sp->router->lock); 8812 } 8813 8814 static int mlxsw_sp_inetaddr_macvlan_event(struct mlxsw_sp *mlxsw_sp, 8815 struct net_device *macvlan_dev, 8816 unsigned long event, 8817 struct netlink_ext_ack *extack) 8818 { 8819 switch (event) { 8820 case NETDEV_UP: 8821 return mlxsw_sp_rif_macvlan_add(mlxsw_sp, macvlan_dev, extack); 8822 case NETDEV_DOWN: 8823 __mlxsw_sp_rif_macvlan_del(mlxsw_sp, macvlan_dev); 8824 break; 8825 } 8826 8827 return 0; 8828 } 8829 8830 static int __mlxsw_sp_inetaddr_event(struct mlxsw_sp *mlxsw_sp, 8831 struct net_device *dev, 8832 unsigned long event, 8833 struct netlink_ext_ack *extack) 8834 { 8835 if (mlxsw_sp_port_dev_check(dev)) 8836 return mlxsw_sp_inetaddr_port_event(dev, event, extack); 8837 else if (netif_is_lag_master(dev)) 8838 return mlxsw_sp_inetaddr_lag_event(dev, event, extack); 8839 else if (netif_is_bridge_master(dev)) 8840 return mlxsw_sp_inetaddr_bridge_event(mlxsw_sp, dev, event, 8841 extack); 8842 else if (is_vlan_dev(dev)) 8843 return mlxsw_sp_inetaddr_vlan_event(mlxsw_sp, dev, event, 8844 extack); 8845 else if (netif_is_macvlan(dev)) 8846 return mlxsw_sp_inetaddr_macvlan_event(mlxsw_sp, dev, event, 8847 extack); 8848 else 8849 return 0; 8850 } 8851 8852 static int mlxsw_sp_inetaddr_event(struct notifier_block *nb, 8853 unsigned long event, void *ptr) 8854 { 8855 struct in_ifaddr *ifa = (struct in_ifaddr *) ptr; 8856 struct net_device *dev = ifa->ifa_dev->dev; 8857 struct mlxsw_sp_router *router; 8858 struct mlxsw_sp_rif *rif; 8859 int err = 0; 8860 8861 /* NETDEV_UP event is handled by mlxsw_sp_inetaddr_valid_event */ 8862 if (event == NETDEV_UP) 8863 return NOTIFY_DONE; 8864 8865 router = container_of(nb, struct mlxsw_sp_router, inetaddr_nb); 8866 mutex_lock(&router->lock); 8867 rif = mlxsw_sp_rif_find_by_dev(router->mlxsw_sp, dev); 8868 if (!mlxsw_sp_rif_should_config(rif, dev, event)) 8869 goto out; 8870 8871 err = __mlxsw_sp_inetaddr_event(router->mlxsw_sp, dev, event, NULL); 8872 out: 8873 mutex_unlock(&router->lock); 8874 return notifier_from_errno(err); 8875 } 8876 8877 int mlxsw_sp_inetaddr_valid_event(struct notifier_block *unused, 8878 unsigned long event, void *ptr) 8879 { 8880 struct in_validator_info *ivi = (struct in_validator_info *) ptr; 8881 struct net_device *dev = ivi->ivi_dev->dev; 8882 struct mlxsw_sp *mlxsw_sp; 8883 struct mlxsw_sp_rif *rif; 8884 int err = 0; 8885 8886 mlxsw_sp = mlxsw_sp_lower_get(dev); 8887 if (!mlxsw_sp) 8888 return NOTIFY_DONE; 8889 8890 mutex_lock(&mlxsw_sp->router->lock); 8891 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); 8892 if (!mlxsw_sp_rif_should_config(rif, dev, event)) 8893 goto out; 8894 8895 err = __mlxsw_sp_inetaddr_event(mlxsw_sp, dev, event, ivi->extack); 8896 out: 8897 mutex_unlock(&mlxsw_sp->router->lock); 8898 return notifier_from_errno(err); 8899 } 8900 8901 struct mlxsw_sp_inet6addr_event_work { 8902 struct work_struct work; 8903 struct mlxsw_sp *mlxsw_sp; 8904 struct net_device *dev; 8905 unsigned long event; 8906 }; 8907 8908 static void mlxsw_sp_inet6addr_event_work(struct work_struct *work) 8909 { 8910 struct mlxsw_sp_inet6addr_event_work *inet6addr_work = 8911 container_of(work, struct mlxsw_sp_inet6addr_event_work, work); 8912 struct mlxsw_sp *mlxsw_sp = inet6addr_work->mlxsw_sp; 8913 struct net_device *dev = inet6addr_work->dev; 8914 unsigned long event = inet6addr_work->event; 8915 struct mlxsw_sp_rif *rif; 8916 8917 rtnl_lock(); 8918 mutex_lock(&mlxsw_sp->router->lock); 8919 8920 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); 8921 if (!mlxsw_sp_rif_should_config(rif, dev, event)) 8922 goto out; 8923 8924 __mlxsw_sp_inetaddr_event(mlxsw_sp, dev, event, NULL); 8925 out: 8926 mutex_unlock(&mlxsw_sp->router->lock); 8927 rtnl_unlock(); 8928 dev_put(dev); 8929 kfree(inet6addr_work); 8930 } 8931 8932 /* Called with rcu_read_lock() */ 8933 static int mlxsw_sp_inet6addr_event(struct notifier_block *nb, 8934 unsigned long event, void *ptr) 8935 { 8936 struct inet6_ifaddr *if6 = (struct inet6_ifaddr *) ptr; 8937 struct mlxsw_sp_inet6addr_event_work *inet6addr_work; 8938 struct net_device *dev = if6->idev->dev; 8939 struct mlxsw_sp_router *router; 8940 8941 /* NETDEV_UP event is handled by mlxsw_sp_inet6addr_valid_event */ 8942 if (event == NETDEV_UP) 8943 return NOTIFY_DONE; 8944 8945 inet6addr_work = kzalloc(sizeof(*inet6addr_work), GFP_ATOMIC); 8946 if (!inet6addr_work) 8947 return NOTIFY_BAD; 8948 8949 router = container_of(nb, struct mlxsw_sp_router, inet6addr_nb); 8950 INIT_WORK(&inet6addr_work->work, mlxsw_sp_inet6addr_event_work); 8951 inet6addr_work->mlxsw_sp = router->mlxsw_sp; 8952 inet6addr_work->dev = dev; 8953 inet6addr_work->event = event; 8954 dev_hold(dev); 8955 mlxsw_core_schedule_work(&inet6addr_work->work); 8956 8957 return NOTIFY_DONE; 8958 } 8959 8960 int mlxsw_sp_inet6addr_valid_event(struct notifier_block *unused, 8961 unsigned long event, void *ptr) 8962 { 8963 struct in6_validator_info *i6vi = (struct in6_validator_info *) ptr; 8964 struct net_device *dev = i6vi->i6vi_dev->dev; 8965 struct mlxsw_sp *mlxsw_sp; 8966 struct mlxsw_sp_rif *rif; 8967 int err = 0; 8968 8969 mlxsw_sp = mlxsw_sp_lower_get(dev); 8970 if (!mlxsw_sp) 8971 return NOTIFY_DONE; 8972 8973 mutex_lock(&mlxsw_sp->router->lock); 8974 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); 8975 if (!mlxsw_sp_rif_should_config(rif, dev, event)) 8976 goto out; 8977 8978 err = __mlxsw_sp_inetaddr_event(mlxsw_sp, dev, event, i6vi->extack); 8979 out: 8980 mutex_unlock(&mlxsw_sp->router->lock); 8981 return notifier_from_errno(err); 8982 } 8983 8984 static int mlxsw_sp_rif_edit(struct mlxsw_sp *mlxsw_sp, u16 rif_index, 8985 const char *mac, int mtu, u8 mac_profile) 8986 { 8987 char ritr_pl[MLXSW_REG_RITR_LEN]; 8988 int err; 8989 8990 mlxsw_reg_ritr_rif_pack(ritr_pl, rif_index); 8991 err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 8992 if (err) 8993 return err; 8994 8995 mlxsw_reg_ritr_mtu_set(ritr_pl, mtu); 8996 mlxsw_reg_ritr_if_mac_memcpy_to(ritr_pl, mac); 8997 mlxsw_reg_ritr_if_mac_profile_id_set(ritr_pl, mac_profile); 8998 mlxsw_reg_ritr_op_set(ritr_pl, MLXSW_REG_RITR_RIF_CREATE); 8999 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 9000 } 9001 9002 static int 9003 mlxsw_sp_router_port_change_event(struct mlxsw_sp *mlxsw_sp, 9004 struct mlxsw_sp_rif *rif, 9005 struct netlink_ext_ack *extack) 9006 { 9007 struct net_device *dev = rif->dev; 9008 u8 old_mac_profile; 9009 u16 fid_index; 9010 int err; 9011 9012 fid_index = mlxsw_sp_fid_index(rif->fid); 9013 9014 err = mlxsw_sp_rif_fdb_op(mlxsw_sp, rif->addr, fid_index, false); 9015 if (err) 9016 return err; 9017 9018 old_mac_profile = rif->mac_profile_id; 9019 err = mlxsw_sp_rif_mac_profile_replace(mlxsw_sp, rif, dev->dev_addr, 9020 extack); 9021 if (err) 9022 goto err_rif_mac_profile_replace; 9023 9024 err = mlxsw_sp_rif_edit(mlxsw_sp, rif->rif_index, dev->dev_addr, 9025 dev->mtu, rif->mac_profile_id); 9026 if (err) 9027 goto err_rif_edit; 9028 9029 err = mlxsw_sp_rif_fdb_op(mlxsw_sp, dev->dev_addr, fid_index, true); 9030 if (err) 9031 goto err_rif_fdb_op; 9032 9033 if (rif->mtu != dev->mtu) { 9034 struct mlxsw_sp_vr *vr; 9035 int i; 9036 9037 /* The RIF is relevant only to its mr_table instance, as unlike 9038 * unicast routing, in multicast routing a RIF cannot be shared 9039 * between several multicast routing tables. 9040 */ 9041 vr = &mlxsw_sp->router->vrs[rif->vr_id]; 9042 for (i = 0; i < MLXSW_SP_L3_PROTO_MAX; i++) 9043 mlxsw_sp_mr_rif_mtu_update(vr->mr_table[i], 9044 rif, dev->mtu); 9045 } 9046 9047 ether_addr_copy(rif->addr, dev->dev_addr); 9048 rif->mtu = dev->mtu; 9049 9050 netdev_dbg(dev, "Updated RIF=%d\n", rif->rif_index); 9051 9052 return 0; 9053 9054 err_rif_fdb_op: 9055 mlxsw_sp_rif_edit(mlxsw_sp, rif->rif_index, rif->addr, rif->mtu, 9056 old_mac_profile); 9057 err_rif_edit: 9058 mlxsw_sp_rif_mac_profile_replace(mlxsw_sp, rif, rif->addr, extack); 9059 err_rif_mac_profile_replace: 9060 mlxsw_sp_rif_fdb_op(mlxsw_sp, rif->addr, fid_index, true); 9061 return err; 9062 } 9063 9064 static int mlxsw_sp_router_port_pre_changeaddr_event(struct mlxsw_sp_rif *rif, 9065 struct netdev_notifier_pre_changeaddr_info *info) 9066 { 9067 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 9068 struct mlxsw_sp_rif_mac_profile *profile; 9069 struct netlink_ext_ack *extack; 9070 u8 max_rif_mac_profiles; 9071 u64 occ; 9072 9073 extack = netdev_notifier_info_to_extack(&info->info); 9074 9075 profile = mlxsw_sp_rif_mac_profile_find(mlxsw_sp, info->dev_addr); 9076 if (profile) 9077 return 0; 9078 9079 max_rif_mac_profiles = mlxsw_sp->router->max_rif_mac_profile; 9080 occ = mlxsw_sp_rif_mac_profiles_occ_get(mlxsw_sp); 9081 if (occ < max_rif_mac_profiles) 9082 return 0; 9083 9084 if (!mlxsw_sp_rif_mac_profile_is_shared(rif)) 9085 return 0; 9086 9087 NL_SET_ERR_MSG_MOD(extack, "Exceeded number of supported router interface MAC profiles"); 9088 return -ENOBUFS; 9089 } 9090 9091 static bool mlxsw_sp_is_offload_xstats_event(unsigned long event) 9092 { 9093 switch (event) { 9094 case NETDEV_OFFLOAD_XSTATS_ENABLE: 9095 case NETDEV_OFFLOAD_XSTATS_DISABLE: 9096 case NETDEV_OFFLOAD_XSTATS_REPORT_USED: 9097 case NETDEV_OFFLOAD_XSTATS_REPORT_DELTA: 9098 return true; 9099 } 9100 9101 return false; 9102 } 9103 9104 static int 9105 mlxsw_sp_router_port_offload_xstats_cmd(struct mlxsw_sp_rif *rif, 9106 unsigned long event, 9107 struct netdev_notifier_offload_xstats_info *info) 9108 { 9109 switch (info->type) { 9110 case NETDEV_OFFLOAD_XSTATS_TYPE_L3: 9111 break; 9112 default: 9113 return 0; 9114 } 9115 9116 switch (event) { 9117 case NETDEV_OFFLOAD_XSTATS_ENABLE: 9118 return mlxsw_sp_router_port_l3_stats_enable(rif); 9119 case NETDEV_OFFLOAD_XSTATS_DISABLE: 9120 mlxsw_sp_router_port_l3_stats_disable(rif); 9121 return 0; 9122 case NETDEV_OFFLOAD_XSTATS_REPORT_USED: 9123 mlxsw_sp_router_port_l3_stats_report_used(rif, info); 9124 return 0; 9125 case NETDEV_OFFLOAD_XSTATS_REPORT_DELTA: 9126 return mlxsw_sp_router_port_l3_stats_report_delta(rif, info); 9127 } 9128 9129 WARN_ON_ONCE(1); 9130 return 0; 9131 } 9132 9133 static int 9134 mlxsw_sp_netdevice_offload_xstats_cmd(struct mlxsw_sp *mlxsw_sp, 9135 struct net_device *dev, 9136 unsigned long event, 9137 struct netdev_notifier_offload_xstats_info *info) 9138 { 9139 struct mlxsw_sp_rif *rif; 9140 9141 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); 9142 if (!rif) 9143 return 0; 9144 9145 return mlxsw_sp_router_port_offload_xstats_cmd(rif, event, info); 9146 } 9147 9148 static bool mlxsw_sp_is_router_event(unsigned long event) 9149 { 9150 switch (event) { 9151 case NETDEV_PRE_CHANGEADDR: 9152 case NETDEV_CHANGEADDR: 9153 case NETDEV_CHANGEMTU: 9154 return true; 9155 default: 9156 return false; 9157 } 9158 } 9159 9160 static int mlxsw_sp_netdevice_router_port_event(struct net_device *dev, 9161 unsigned long event, void *ptr) 9162 { 9163 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr); 9164 struct mlxsw_sp *mlxsw_sp; 9165 struct mlxsw_sp_rif *rif; 9166 9167 mlxsw_sp = mlxsw_sp_lower_get(dev); 9168 if (!mlxsw_sp) 9169 return 0; 9170 9171 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); 9172 if (!rif) 9173 return 0; 9174 9175 switch (event) { 9176 case NETDEV_CHANGEMTU: 9177 case NETDEV_CHANGEADDR: 9178 return mlxsw_sp_router_port_change_event(mlxsw_sp, rif, extack); 9179 case NETDEV_PRE_CHANGEADDR: 9180 return mlxsw_sp_router_port_pre_changeaddr_event(rif, ptr); 9181 default: 9182 WARN_ON_ONCE(1); 9183 break; 9184 } 9185 9186 return 0; 9187 } 9188 9189 static int mlxsw_sp_port_vrf_join(struct mlxsw_sp *mlxsw_sp, 9190 struct net_device *l3_dev, 9191 struct netlink_ext_ack *extack) 9192 { 9193 struct mlxsw_sp_rif *rif; 9194 9195 /* If netdev is already associated with a RIF, then we need to 9196 * destroy it and create a new one with the new virtual router ID. 9197 */ 9198 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, l3_dev); 9199 if (rif) 9200 __mlxsw_sp_inetaddr_event(mlxsw_sp, l3_dev, NETDEV_DOWN, 9201 extack); 9202 9203 return __mlxsw_sp_inetaddr_event(mlxsw_sp, l3_dev, NETDEV_UP, extack); 9204 } 9205 9206 static void mlxsw_sp_port_vrf_leave(struct mlxsw_sp *mlxsw_sp, 9207 struct net_device *l3_dev) 9208 { 9209 struct mlxsw_sp_rif *rif; 9210 9211 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, l3_dev); 9212 if (!rif) 9213 return; 9214 __mlxsw_sp_inetaddr_event(mlxsw_sp, l3_dev, NETDEV_DOWN, NULL); 9215 } 9216 9217 static bool mlxsw_sp_is_vrf_event(unsigned long event, void *ptr) 9218 { 9219 struct netdev_notifier_changeupper_info *info = ptr; 9220 9221 if (event != NETDEV_PRECHANGEUPPER && event != NETDEV_CHANGEUPPER) 9222 return false; 9223 return netif_is_l3_master(info->upper_dev); 9224 } 9225 9226 static int 9227 mlxsw_sp_netdevice_vrf_event(struct net_device *l3_dev, unsigned long event, 9228 struct netdev_notifier_changeupper_info *info) 9229 { 9230 struct mlxsw_sp *mlxsw_sp = mlxsw_sp_lower_get(l3_dev); 9231 int err = 0; 9232 9233 /* We do not create a RIF for a macvlan, but only use it to 9234 * direct more MAC addresses to the router. 9235 */ 9236 if (!mlxsw_sp || netif_is_macvlan(l3_dev)) 9237 return 0; 9238 9239 switch (event) { 9240 case NETDEV_PRECHANGEUPPER: 9241 break; 9242 case NETDEV_CHANGEUPPER: 9243 if (info->linking) { 9244 struct netlink_ext_ack *extack; 9245 9246 extack = netdev_notifier_info_to_extack(&info->info); 9247 err = mlxsw_sp_port_vrf_join(mlxsw_sp, l3_dev, extack); 9248 } else { 9249 mlxsw_sp_port_vrf_leave(mlxsw_sp, l3_dev); 9250 } 9251 break; 9252 } 9253 9254 return err; 9255 } 9256 9257 static int mlxsw_sp_router_netdevice_event(struct notifier_block *nb, 9258 unsigned long event, void *ptr) 9259 { 9260 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 9261 struct mlxsw_sp_router *router; 9262 struct mlxsw_sp *mlxsw_sp; 9263 int err = 0; 9264 9265 router = container_of(nb, struct mlxsw_sp_router, netdevice_nb); 9266 mlxsw_sp = router->mlxsw_sp; 9267 9268 mutex_lock(&mlxsw_sp->router->lock); 9269 9270 if (mlxsw_sp_is_offload_xstats_event(event)) 9271 err = mlxsw_sp_netdevice_offload_xstats_cmd(mlxsw_sp, dev, 9272 event, ptr); 9273 else if (mlxsw_sp_netdev_is_ipip_ol(mlxsw_sp, dev)) 9274 err = mlxsw_sp_netdevice_ipip_ol_event(mlxsw_sp, dev, 9275 event, ptr); 9276 else if (mlxsw_sp_netdev_is_ipip_ul(mlxsw_sp, dev)) 9277 err = mlxsw_sp_netdevice_ipip_ul_event(mlxsw_sp, dev, 9278 event, ptr); 9279 else if (mlxsw_sp_is_router_event(event)) 9280 err = mlxsw_sp_netdevice_router_port_event(dev, event, ptr); 9281 else if (mlxsw_sp_is_vrf_event(event, ptr)) 9282 err = mlxsw_sp_netdevice_vrf_event(dev, event, ptr); 9283 9284 mutex_unlock(&mlxsw_sp->router->lock); 9285 9286 return notifier_from_errno(err); 9287 } 9288 9289 static int __mlxsw_sp_rif_macvlan_flush(struct net_device *dev, 9290 struct netdev_nested_priv *priv) 9291 { 9292 struct mlxsw_sp_rif *rif = (struct mlxsw_sp_rif *)priv->data; 9293 9294 if (!netif_is_macvlan(dev)) 9295 return 0; 9296 9297 return mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, dev->dev_addr, 9298 mlxsw_sp_fid_index(rif->fid), false); 9299 } 9300 9301 static int mlxsw_sp_rif_macvlan_flush(struct mlxsw_sp_rif *rif) 9302 { 9303 struct netdev_nested_priv priv = { 9304 .data = (void *)rif, 9305 }; 9306 9307 if (!netif_is_macvlan_port(rif->dev)) 9308 return 0; 9309 9310 netdev_warn(rif->dev, "Router interface is deleted. Upper macvlans will not work\n"); 9311 return netdev_walk_all_upper_dev_rcu(rif->dev, 9312 __mlxsw_sp_rif_macvlan_flush, &priv); 9313 } 9314 9315 static void mlxsw_sp_rif_subport_setup(struct mlxsw_sp_rif *rif, 9316 const struct mlxsw_sp_rif_params *params) 9317 { 9318 struct mlxsw_sp_rif_subport *rif_subport; 9319 9320 rif_subport = mlxsw_sp_rif_subport_rif(rif); 9321 refcount_set(&rif_subport->ref_count, 1); 9322 rif_subport->vid = params->vid; 9323 rif_subport->lag = params->lag; 9324 if (params->lag) 9325 rif_subport->lag_id = params->lag_id; 9326 else 9327 rif_subport->system_port = params->system_port; 9328 } 9329 9330 static int mlxsw_sp_rif_subport_op(struct mlxsw_sp_rif *rif, bool enable) 9331 { 9332 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 9333 struct mlxsw_sp_rif_subport *rif_subport; 9334 char ritr_pl[MLXSW_REG_RITR_LEN]; 9335 u16 efid; 9336 9337 rif_subport = mlxsw_sp_rif_subport_rif(rif); 9338 mlxsw_reg_ritr_pack(ritr_pl, enable, MLXSW_REG_RITR_SP_IF, 9339 rif->rif_index, rif->vr_id, rif->dev->mtu); 9340 mlxsw_reg_ritr_mac_pack(ritr_pl, rif->dev->dev_addr); 9341 mlxsw_reg_ritr_if_mac_profile_id_set(ritr_pl, rif->mac_profile_id); 9342 efid = mlxsw_sp_fid_index(rif->fid); 9343 mlxsw_reg_ritr_sp_if_pack(ritr_pl, rif_subport->lag, 9344 rif_subport->lag ? rif_subport->lag_id : 9345 rif_subport->system_port, 9346 efid, 0); 9347 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 9348 } 9349 9350 static int mlxsw_sp_rif_subport_configure(struct mlxsw_sp_rif *rif, 9351 struct netlink_ext_ack *extack) 9352 { 9353 u8 mac_profile; 9354 int err; 9355 9356 err = mlxsw_sp_rif_mac_profile_get(rif->mlxsw_sp, rif->addr, 9357 &mac_profile, extack); 9358 if (err) 9359 return err; 9360 rif->mac_profile_id = mac_profile; 9361 9362 err = mlxsw_sp_rif_subport_op(rif, true); 9363 if (err) 9364 goto err_rif_subport_op; 9365 9366 err = mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr, 9367 mlxsw_sp_fid_index(rif->fid), true); 9368 if (err) 9369 goto err_rif_fdb_op; 9370 9371 err = mlxsw_sp_fid_rif_set(rif->fid, rif); 9372 if (err) 9373 goto err_fid_rif_set; 9374 9375 return 0; 9376 9377 err_fid_rif_set: 9378 mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr, 9379 mlxsw_sp_fid_index(rif->fid), false); 9380 err_rif_fdb_op: 9381 mlxsw_sp_rif_subport_op(rif, false); 9382 err_rif_subport_op: 9383 mlxsw_sp_rif_mac_profile_put(rif->mlxsw_sp, mac_profile); 9384 return err; 9385 } 9386 9387 static void mlxsw_sp_rif_subport_deconfigure(struct mlxsw_sp_rif *rif) 9388 { 9389 struct mlxsw_sp_fid *fid = rif->fid; 9390 9391 mlxsw_sp_fid_rif_unset(fid); 9392 mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr, 9393 mlxsw_sp_fid_index(fid), false); 9394 mlxsw_sp_rif_macvlan_flush(rif); 9395 mlxsw_sp_rif_subport_op(rif, false); 9396 mlxsw_sp_rif_mac_profile_put(rif->mlxsw_sp, rif->mac_profile_id); 9397 } 9398 9399 static struct mlxsw_sp_fid * 9400 mlxsw_sp_rif_subport_fid_get(struct mlxsw_sp_rif *rif, 9401 struct netlink_ext_ack *extack) 9402 { 9403 return mlxsw_sp_fid_rfid_get(rif->mlxsw_sp, rif->rif_index); 9404 } 9405 9406 static const struct mlxsw_sp_rif_ops mlxsw_sp_rif_subport_ops = { 9407 .type = MLXSW_SP_RIF_TYPE_SUBPORT, 9408 .rif_size = sizeof(struct mlxsw_sp_rif_subport), 9409 .setup = mlxsw_sp_rif_subport_setup, 9410 .configure = mlxsw_sp_rif_subport_configure, 9411 .deconfigure = mlxsw_sp_rif_subport_deconfigure, 9412 .fid_get = mlxsw_sp_rif_subport_fid_get, 9413 }; 9414 9415 static int mlxsw_sp_rif_fid_op(struct mlxsw_sp_rif *rif, u16 fid, bool enable) 9416 { 9417 enum mlxsw_reg_ritr_if_type type = MLXSW_REG_RITR_FID_IF; 9418 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 9419 char ritr_pl[MLXSW_REG_RITR_LEN]; 9420 9421 mlxsw_reg_ritr_pack(ritr_pl, enable, type, rif->rif_index, rif->vr_id, 9422 rif->dev->mtu); 9423 mlxsw_reg_ritr_mac_pack(ritr_pl, rif->dev->dev_addr); 9424 mlxsw_reg_ritr_if_mac_profile_id_set(ritr_pl, rif->mac_profile_id); 9425 mlxsw_reg_ritr_fid_if_fid_set(ritr_pl, fid); 9426 9427 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 9428 } 9429 9430 u16 mlxsw_sp_router_port(const struct mlxsw_sp *mlxsw_sp) 9431 { 9432 return mlxsw_core_max_ports(mlxsw_sp->core) + 1; 9433 } 9434 9435 static int mlxsw_sp_rif_fid_configure(struct mlxsw_sp_rif *rif, 9436 struct netlink_ext_ack *extack) 9437 { 9438 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 9439 u16 fid_index = mlxsw_sp_fid_index(rif->fid); 9440 u8 mac_profile; 9441 int err; 9442 9443 err = mlxsw_sp_rif_mac_profile_get(mlxsw_sp, rif->addr, 9444 &mac_profile, extack); 9445 if (err) 9446 return err; 9447 rif->mac_profile_id = mac_profile; 9448 9449 err = mlxsw_sp_rif_fid_op(rif, fid_index, true); 9450 if (err) 9451 goto err_rif_fid_op; 9452 9453 err = mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_MC, 9454 mlxsw_sp_router_port(mlxsw_sp), true); 9455 if (err) 9456 goto err_fid_mc_flood_set; 9457 9458 err = mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_BC, 9459 mlxsw_sp_router_port(mlxsw_sp), true); 9460 if (err) 9461 goto err_fid_bc_flood_set; 9462 9463 err = mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr, 9464 mlxsw_sp_fid_index(rif->fid), true); 9465 if (err) 9466 goto err_rif_fdb_op; 9467 9468 err = mlxsw_sp_fid_rif_set(rif->fid, rif); 9469 if (err) 9470 goto err_fid_rif_set; 9471 9472 return 0; 9473 9474 err_fid_rif_set: 9475 mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr, 9476 mlxsw_sp_fid_index(rif->fid), false); 9477 err_rif_fdb_op: 9478 mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_BC, 9479 mlxsw_sp_router_port(mlxsw_sp), false); 9480 err_fid_bc_flood_set: 9481 mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_MC, 9482 mlxsw_sp_router_port(mlxsw_sp), false); 9483 err_fid_mc_flood_set: 9484 mlxsw_sp_rif_fid_op(rif, fid_index, false); 9485 err_rif_fid_op: 9486 mlxsw_sp_rif_mac_profile_put(mlxsw_sp, mac_profile); 9487 return err; 9488 } 9489 9490 static void mlxsw_sp_rif_fid_deconfigure(struct mlxsw_sp_rif *rif) 9491 { 9492 u16 fid_index = mlxsw_sp_fid_index(rif->fid); 9493 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 9494 struct mlxsw_sp_fid *fid = rif->fid; 9495 9496 mlxsw_sp_fid_rif_unset(fid); 9497 mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr, 9498 mlxsw_sp_fid_index(fid), false); 9499 mlxsw_sp_rif_macvlan_flush(rif); 9500 mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_BC, 9501 mlxsw_sp_router_port(mlxsw_sp), false); 9502 mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_MC, 9503 mlxsw_sp_router_port(mlxsw_sp), false); 9504 mlxsw_sp_rif_fid_op(rif, fid_index, false); 9505 mlxsw_sp_rif_mac_profile_put(rif->mlxsw_sp, rif->mac_profile_id); 9506 } 9507 9508 static struct mlxsw_sp_fid * 9509 mlxsw_sp_rif_fid_fid_get(struct mlxsw_sp_rif *rif, 9510 struct netlink_ext_ack *extack) 9511 { 9512 return mlxsw_sp_fid_8021d_get(rif->mlxsw_sp, rif->dev->ifindex); 9513 } 9514 9515 static void mlxsw_sp_rif_fid_fdb_del(struct mlxsw_sp_rif *rif, const char *mac) 9516 { 9517 struct switchdev_notifier_fdb_info info = {}; 9518 struct net_device *dev; 9519 9520 dev = br_fdb_find_port(rif->dev, mac, 0); 9521 if (!dev) 9522 return; 9523 9524 info.addr = mac; 9525 info.vid = 0; 9526 call_switchdev_notifiers(SWITCHDEV_FDB_DEL_TO_BRIDGE, dev, &info.info, 9527 NULL); 9528 } 9529 9530 static const struct mlxsw_sp_rif_ops mlxsw_sp_rif_fid_ops = { 9531 .type = MLXSW_SP_RIF_TYPE_FID, 9532 .rif_size = sizeof(struct mlxsw_sp_rif), 9533 .configure = mlxsw_sp_rif_fid_configure, 9534 .deconfigure = mlxsw_sp_rif_fid_deconfigure, 9535 .fid_get = mlxsw_sp_rif_fid_fid_get, 9536 .fdb_del = mlxsw_sp_rif_fid_fdb_del, 9537 }; 9538 9539 static struct mlxsw_sp_fid * 9540 mlxsw_sp_rif_vlan_fid_get(struct mlxsw_sp_rif *rif, 9541 struct netlink_ext_ack *extack) 9542 { 9543 struct net_device *br_dev; 9544 u16 vid; 9545 int err; 9546 9547 if (is_vlan_dev(rif->dev)) { 9548 vid = vlan_dev_vlan_id(rif->dev); 9549 br_dev = vlan_dev_real_dev(rif->dev); 9550 if (WARN_ON(!netif_is_bridge_master(br_dev))) 9551 return ERR_PTR(-EINVAL); 9552 } else { 9553 err = br_vlan_get_pvid(rif->dev, &vid); 9554 if (err < 0 || !vid) { 9555 NL_SET_ERR_MSG_MOD(extack, "Couldn't determine bridge PVID"); 9556 return ERR_PTR(-EINVAL); 9557 } 9558 } 9559 9560 return mlxsw_sp_fid_8021q_get(rif->mlxsw_sp, vid); 9561 } 9562 9563 static void mlxsw_sp_rif_vlan_fdb_del(struct mlxsw_sp_rif *rif, const char *mac) 9564 { 9565 struct switchdev_notifier_fdb_info info = {}; 9566 u16 vid = mlxsw_sp_fid_8021q_vid(rif->fid); 9567 struct net_device *br_dev; 9568 struct net_device *dev; 9569 9570 br_dev = is_vlan_dev(rif->dev) ? vlan_dev_real_dev(rif->dev) : rif->dev; 9571 dev = br_fdb_find_port(br_dev, mac, vid); 9572 if (!dev) 9573 return; 9574 9575 info.addr = mac; 9576 info.vid = vid; 9577 call_switchdev_notifiers(SWITCHDEV_FDB_DEL_TO_BRIDGE, dev, &info.info, 9578 NULL); 9579 } 9580 9581 static int mlxsw_sp_rif_vlan_op(struct mlxsw_sp_rif *rif, u16 vid, u16 efid, 9582 bool enable) 9583 { 9584 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 9585 char ritr_pl[MLXSW_REG_RITR_LEN]; 9586 9587 mlxsw_reg_ritr_vlan_if_pack(ritr_pl, enable, rif->rif_index, rif->vr_id, 9588 rif->dev->mtu, rif->dev->dev_addr, 9589 rif->mac_profile_id, vid, efid); 9590 9591 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 9592 } 9593 9594 static int mlxsw_sp_rif_vlan_configure(struct mlxsw_sp_rif *rif, u16 efid, 9595 struct netlink_ext_ack *extack) 9596 { 9597 u16 vid = mlxsw_sp_fid_8021q_vid(rif->fid); 9598 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 9599 u8 mac_profile; 9600 int err; 9601 9602 err = mlxsw_sp_rif_mac_profile_get(mlxsw_sp, rif->addr, 9603 &mac_profile, extack); 9604 if (err) 9605 return err; 9606 rif->mac_profile_id = mac_profile; 9607 9608 err = mlxsw_sp_rif_vlan_op(rif, vid, efid, true); 9609 if (err) 9610 goto err_rif_vlan_fid_op; 9611 9612 err = mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_MC, 9613 mlxsw_sp_router_port(mlxsw_sp), true); 9614 if (err) 9615 goto err_fid_mc_flood_set; 9616 9617 err = mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_BC, 9618 mlxsw_sp_router_port(mlxsw_sp), true); 9619 if (err) 9620 goto err_fid_bc_flood_set; 9621 9622 err = mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr, 9623 mlxsw_sp_fid_index(rif->fid), true); 9624 if (err) 9625 goto err_rif_fdb_op; 9626 9627 err = mlxsw_sp_fid_rif_set(rif->fid, rif); 9628 if (err) 9629 goto err_fid_rif_set; 9630 9631 return 0; 9632 9633 err_fid_rif_set: 9634 mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr, 9635 mlxsw_sp_fid_index(rif->fid), false); 9636 err_rif_fdb_op: 9637 mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_BC, 9638 mlxsw_sp_router_port(mlxsw_sp), false); 9639 err_fid_bc_flood_set: 9640 mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_MC, 9641 mlxsw_sp_router_port(mlxsw_sp), false); 9642 err_fid_mc_flood_set: 9643 mlxsw_sp_rif_vlan_op(rif, vid, 0, false); 9644 err_rif_vlan_fid_op: 9645 mlxsw_sp_rif_mac_profile_put(mlxsw_sp, mac_profile); 9646 return err; 9647 } 9648 9649 static void mlxsw_sp_rif_vlan_deconfigure(struct mlxsw_sp_rif *rif) 9650 { 9651 u16 vid = mlxsw_sp_fid_8021q_vid(rif->fid); 9652 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 9653 9654 mlxsw_sp_fid_rif_unset(rif->fid); 9655 mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr, 9656 mlxsw_sp_fid_index(rif->fid), false); 9657 mlxsw_sp_rif_macvlan_flush(rif); 9658 mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_BC, 9659 mlxsw_sp_router_port(mlxsw_sp), false); 9660 mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_MC, 9661 mlxsw_sp_router_port(mlxsw_sp), false); 9662 mlxsw_sp_rif_vlan_op(rif, vid, 0, false); 9663 mlxsw_sp_rif_mac_profile_put(rif->mlxsw_sp, rif->mac_profile_id); 9664 } 9665 9666 static int mlxsw_sp1_rif_vlan_configure(struct mlxsw_sp_rif *rif, 9667 struct netlink_ext_ack *extack) 9668 { 9669 return mlxsw_sp_rif_vlan_configure(rif, 0, extack); 9670 } 9671 9672 static const struct mlxsw_sp_rif_ops mlxsw_sp1_rif_vlan_ops = { 9673 .type = MLXSW_SP_RIF_TYPE_VLAN, 9674 .rif_size = sizeof(struct mlxsw_sp_rif), 9675 .configure = mlxsw_sp1_rif_vlan_configure, 9676 .deconfigure = mlxsw_sp_rif_vlan_deconfigure, 9677 .fid_get = mlxsw_sp_rif_vlan_fid_get, 9678 .fdb_del = mlxsw_sp_rif_vlan_fdb_del, 9679 }; 9680 9681 static int mlxsw_sp2_rif_vlan_configure(struct mlxsw_sp_rif *rif, 9682 struct netlink_ext_ack *extack) 9683 { 9684 u16 efid = mlxsw_sp_fid_index(rif->fid); 9685 9686 return mlxsw_sp_rif_vlan_configure(rif, efid, extack); 9687 } 9688 9689 static const struct mlxsw_sp_rif_ops mlxsw_sp2_rif_vlan_ops = { 9690 .type = MLXSW_SP_RIF_TYPE_VLAN, 9691 .rif_size = sizeof(struct mlxsw_sp_rif), 9692 .configure = mlxsw_sp2_rif_vlan_configure, 9693 .deconfigure = mlxsw_sp_rif_vlan_deconfigure, 9694 .fid_get = mlxsw_sp_rif_vlan_fid_get, 9695 .fdb_del = mlxsw_sp_rif_vlan_fdb_del, 9696 }; 9697 9698 static struct mlxsw_sp_rif_ipip_lb * 9699 mlxsw_sp_rif_ipip_lb_rif(struct mlxsw_sp_rif *rif) 9700 { 9701 return container_of(rif, struct mlxsw_sp_rif_ipip_lb, common); 9702 } 9703 9704 static void 9705 mlxsw_sp_rif_ipip_lb_setup(struct mlxsw_sp_rif *rif, 9706 const struct mlxsw_sp_rif_params *params) 9707 { 9708 struct mlxsw_sp_rif_params_ipip_lb *params_lb; 9709 struct mlxsw_sp_rif_ipip_lb *rif_lb; 9710 9711 params_lb = container_of(params, struct mlxsw_sp_rif_params_ipip_lb, 9712 common); 9713 rif_lb = mlxsw_sp_rif_ipip_lb_rif(rif); 9714 rif_lb->lb_config = params_lb->lb_config; 9715 } 9716 9717 static int 9718 mlxsw_sp1_rif_ipip_lb_configure(struct mlxsw_sp_rif *rif, 9719 struct netlink_ext_ack *extack) 9720 { 9721 struct mlxsw_sp_rif_ipip_lb *lb_rif = mlxsw_sp_rif_ipip_lb_rif(rif); 9722 u32 ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(rif->dev); 9723 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 9724 struct mlxsw_sp_vr *ul_vr; 9725 int err; 9726 9727 ul_vr = mlxsw_sp_vr_get(mlxsw_sp, ul_tb_id, NULL); 9728 if (IS_ERR(ul_vr)) 9729 return PTR_ERR(ul_vr); 9730 9731 err = mlxsw_sp_rif_ipip_lb_op(lb_rif, ul_vr->id, 0, true); 9732 if (err) 9733 goto err_loopback_op; 9734 9735 lb_rif->ul_vr_id = ul_vr->id; 9736 lb_rif->ul_rif_id = 0; 9737 ++ul_vr->rif_count; 9738 return 0; 9739 9740 err_loopback_op: 9741 mlxsw_sp_vr_put(mlxsw_sp, ul_vr); 9742 return err; 9743 } 9744 9745 static void mlxsw_sp1_rif_ipip_lb_deconfigure(struct mlxsw_sp_rif *rif) 9746 { 9747 struct mlxsw_sp_rif_ipip_lb *lb_rif = mlxsw_sp_rif_ipip_lb_rif(rif); 9748 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 9749 struct mlxsw_sp_vr *ul_vr; 9750 9751 ul_vr = &mlxsw_sp->router->vrs[lb_rif->ul_vr_id]; 9752 mlxsw_sp_rif_ipip_lb_op(lb_rif, ul_vr->id, 0, false); 9753 9754 --ul_vr->rif_count; 9755 mlxsw_sp_vr_put(mlxsw_sp, ul_vr); 9756 } 9757 9758 static const struct mlxsw_sp_rif_ops mlxsw_sp1_rif_ipip_lb_ops = { 9759 .type = MLXSW_SP_RIF_TYPE_IPIP_LB, 9760 .rif_size = sizeof(struct mlxsw_sp_rif_ipip_lb), 9761 .setup = mlxsw_sp_rif_ipip_lb_setup, 9762 .configure = mlxsw_sp1_rif_ipip_lb_configure, 9763 .deconfigure = mlxsw_sp1_rif_ipip_lb_deconfigure, 9764 }; 9765 9766 static const struct mlxsw_sp_rif_ops *mlxsw_sp1_rif_ops_arr[] = { 9767 [MLXSW_SP_RIF_TYPE_SUBPORT] = &mlxsw_sp_rif_subport_ops, 9768 [MLXSW_SP_RIF_TYPE_VLAN] = &mlxsw_sp1_rif_vlan_ops, 9769 [MLXSW_SP_RIF_TYPE_FID] = &mlxsw_sp_rif_fid_ops, 9770 [MLXSW_SP_RIF_TYPE_IPIP_LB] = &mlxsw_sp1_rif_ipip_lb_ops, 9771 }; 9772 9773 static int 9774 mlxsw_sp_rif_ipip_lb_ul_rif_op(struct mlxsw_sp_rif *ul_rif, bool enable) 9775 { 9776 struct mlxsw_sp *mlxsw_sp = ul_rif->mlxsw_sp; 9777 char ritr_pl[MLXSW_REG_RITR_LEN]; 9778 9779 mlxsw_reg_ritr_pack(ritr_pl, enable, MLXSW_REG_RITR_LOOPBACK_IF, 9780 ul_rif->rif_index, ul_rif->vr_id, IP_MAX_MTU); 9781 mlxsw_reg_ritr_loopback_protocol_set(ritr_pl, 9782 MLXSW_REG_RITR_LOOPBACK_GENERIC); 9783 9784 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 9785 } 9786 9787 static struct mlxsw_sp_rif * 9788 mlxsw_sp_ul_rif_create(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_vr *vr, 9789 struct netlink_ext_ack *extack) 9790 { 9791 struct mlxsw_sp_rif *ul_rif; 9792 u8 rif_entries = 1; 9793 u16 rif_index; 9794 int err; 9795 9796 err = mlxsw_sp_rif_index_alloc(mlxsw_sp, &rif_index, rif_entries); 9797 if (err) { 9798 NL_SET_ERR_MSG_MOD(extack, "Exceeded number of supported router interfaces"); 9799 return ERR_PTR(err); 9800 } 9801 9802 ul_rif = mlxsw_sp_rif_alloc(sizeof(*ul_rif), rif_index, vr->id, NULL); 9803 if (!ul_rif) { 9804 err = -ENOMEM; 9805 goto err_rif_alloc; 9806 } 9807 9808 mlxsw_sp->router->rifs[rif_index] = ul_rif; 9809 ul_rif->mlxsw_sp = mlxsw_sp; 9810 ul_rif->rif_entries = rif_entries; 9811 err = mlxsw_sp_rif_ipip_lb_ul_rif_op(ul_rif, true); 9812 if (err) 9813 goto ul_rif_op_err; 9814 9815 atomic_add(rif_entries, &mlxsw_sp->router->rifs_count); 9816 return ul_rif; 9817 9818 ul_rif_op_err: 9819 mlxsw_sp->router->rifs[rif_index] = NULL; 9820 kfree(ul_rif); 9821 err_rif_alloc: 9822 mlxsw_sp_rif_index_free(mlxsw_sp, rif_index, rif_entries); 9823 return ERR_PTR(err); 9824 } 9825 9826 static void mlxsw_sp_ul_rif_destroy(struct mlxsw_sp_rif *ul_rif) 9827 { 9828 struct mlxsw_sp *mlxsw_sp = ul_rif->mlxsw_sp; 9829 u8 rif_entries = ul_rif->rif_entries; 9830 u16 rif_index = ul_rif->rif_index; 9831 9832 atomic_sub(rif_entries, &mlxsw_sp->router->rifs_count); 9833 mlxsw_sp_rif_ipip_lb_ul_rif_op(ul_rif, false); 9834 mlxsw_sp->router->rifs[ul_rif->rif_index] = NULL; 9835 kfree(ul_rif); 9836 mlxsw_sp_rif_index_free(mlxsw_sp, rif_index, rif_entries); 9837 } 9838 9839 static struct mlxsw_sp_rif * 9840 mlxsw_sp_ul_rif_get(struct mlxsw_sp *mlxsw_sp, u32 tb_id, 9841 struct netlink_ext_ack *extack) 9842 { 9843 struct mlxsw_sp_vr *vr; 9844 int err; 9845 9846 vr = mlxsw_sp_vr_get(mlxsw_sp, tb_id, extack); 9847 if (IS_ERR(vr)) 9848 return ERR_CAST(vr); 9849 9850 if (refcount_inc_not_zero(&vr->ul_rif_refcnt)) 9851 return vr->ul_rif; 9852 9853 vr->ul_rif = mlxsw_sp_ul_rif_create(mlxsw_sp, vr, extack); 9854 if (IS_ERR(vr->ul_rif)) { 9855 err = PTR_ERR(vr->ul_rif); 9856 goto err_ul_rif_create; 9857 } 9858 9859 vr->rif_count++; 9860 refcount_set(&vr->ul_rif_refcnt, 1); 9861 9862 return vr->ul_rif; 9863 9864 err_ul_rif_create: 9865 mlxsw_sp_vr_put(mlxsw_sp, vr); 9866 return ERR_PTR(err); 9867 } 9868 9869 static void mlxsw_sp_ul_rif_put(struct mlxsw_sp_rif *ul_rif) 9870 { 9871 struct mlxsw_sp *mlxsw_sp = ul_rif->mlxsw_sp; 9872 struct mlxsw_sp_vr *vr; 9873 9874 vr = &mlxsw_sp->router->vrs[ul_rif->vr_id]; 9875 9876 if (!refcount_dec_and_test(&vr->ul_rif_refcnt)) 9877 return; 9878 9879 vr->rif_count--; 9880 mlxsw_sp_ul_rif_destroy(ul_rif); 9881 mlxsw_sp_vr_put(mlxsw_sp, vr); 9882 } 9883 9884 int mlxsw_sp_router_ul_rif_get(struct mlxsw_sp *mlxsw_sp, u32 ul_tb_id, 9885 u16 *ul_rif_index) 9886 { 9887 struct mlxsw_sp_rif *ul_rif; 9888 int err = 0; 9889 9890 mutex_lock(&mlxsw_sp->router->lock); 9891 ul_rif = mlxsw_sp_ul_rif_get(mlxsw_sp, ul_tb_id, NULL); 9892 if (IS_ERR(ul_rif)) { 9893 err = PTR_ERR(ul_rif); 9894 goto out; 9895 } 9896 *ul_rif_index = ul_rif->rif_index; 9897 out: 9898 mutex_unlock(&mlxsw_sp->router->lock); 9899 return err; 9900 } 9901 9902 void mlxsw_sp_router_ul_rif_put(struct mlxsw_sp *mlxsw_sp, u16 ul_rif_index) 9903 { 9904 struct mlxsw_sp_rif *ul_rif; 9905 9906 mutex_lock(&mlxsw_sp->router->lock); 9907 ul_rif = mlxsw_sp->router->rifs[ul_rif_index]; 9908 if (WARN_ON(!ul_rif)) 9909 goto out; 9910 9911 mlxsw_sp_ul_rif_put(ul_rif); 9912 out: 9913 mutex_unlock(&mlxsw_sp->router->lock); 9914 } 9915 9916 static int 9917 mlxsw_sp2_rif_ipip_lb_configure(struct mlxsw_sp_rif *rif, 9918 struct netlink_ext_ack *extack) 9919 { 9920 struct mlxsw_sp_rif_ipip_lb *lb_rif = mlxsw_sp_rif_ipip_lb_rif(rif); 9921 u32 ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(rif->dev); 9922 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 9923 struct mlxsw_sp_rif *ul_rif; 9924 int err; 9925 9926 ul_rif = mlxsw_sp_ul_rif_get(mlxsw_sp, ul_tb_id, NULL); 9927 if (IS_ERR(ul_rif)) 9928 return PTR_ERR(ul_rif); 9929 9930 err = mlxsw_sp_rif_ipip_lb_op(lb_rif, 0, ul_rif->rif_index, true); 9931 if (err) 9932 goto err_loopback_op; 9933 9934 lb_rif->ul_vr_id = 0; 9935 lb_rif->ul_rif_id = ul_rif->rif_index; 9936 9937 return 0; 9938 9939 err_loopback_op: 9940 mlxsw_sp_ul_rif_put(ul_rif); 9941 return err; 9942 } 9943 9944 static void mlxsw_sp2_rif_ipip_lb_deconfigure(struct mlxsw_sp_rif *rif) 9945 { 9946 struct mlxsw_sp_rif_ipip_lb *lb_rif = mlxsw_sp_rif_ipip_lb_rif(rif); 9947 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 9948 struct mlxsw_sp_rif *ul_rif; 9949 9950 ul_rif = mlxsw_sp_rif_by_index(mlxsw_sp, lb_rif->ul_rif_id); 9951 mlxsw_sp_rif_ipip_lb_op(lb_rif, 0, lb_rif->ul_rif_id, false); 9952 mlxsw_sp_ul_rif_put(ul_rif); 9953 } 9954 9955 static const struct mlxsw_sp_rif_ops mlxsw_sp2_rif_ipip_lb_ops = { 9956 .type = MLXSW_SP_RIF_TYPE_IPIP_LB, 9957 .rif_size = sizeof(struct mlxsw_sp_rif_ipip_lb), 9958 .setup = mlxsw_sp_rif_ipip_lb_setup, 9959 .configure = mlxsw_sp2_rif_ipip_lb_configure, 9960 .deconfigure = mlxsw_sp2_rif_ipip_lb_deconfigure, 9961 }; 9962 9963 static const struct mlxsw_sp_rif_ops *mlxsw_sp2_rif_ops_arr[] = { 9964 [MLXSW_SP_RIF_TYPE_SUBPORT] = &mlxsw_sp_rif_subport_ops, 9965 [MLXSW_SP_RIF_TYPE_VLAN] = &mlxsw_sp2_rif_vlan_ops, 9966 [MLXSW_SP_RIF_TYPE_FID] = &mlxsw_sp_rif_fid_ops, 9967 [MLXSW_SP_RIF_TYPE_IPIP_LB] = &mlxsw_sp2_rif_ipip_lb_ops, 9968 }; 9969 9970 static int mlxsw_sp_rifs_table_init(struct mlxsw_sp *mlxsw_sp) 9971 { 9972 struct gen_pool *rifs_table; 9973 int err; 9974 9975 rifs_table = gen_pool_create(0, -1); 9976 if (!rifs_table) 9977 return -ENOMEM; 9978 9979 gen_pool_set_algo(rifs_table, gen_pool_first_fit_order_align, 9980 NULL); 9981 9982 err = gen_pool_add(rifs_table, MLXSW_SP_ROUTER_GENALLOC_OFFSET, 9983 MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS), -1); 9984 if (err) 9985 goto err_gen_pool_add; 9986 9987 mlxsw_sp->router->rifs_table = rifs_table; 9988 9989 return 0; 9990 9991 err_gen_pool_add: 9992 gen_pool_destroy(rifs_table); 9993 return err; 9994 } 9995 9996 static void mlxsw_sp_rifs_table_fini(struct mlxsw_sp *mlxsw_sp) 9997 { 9998 gen_pool_destroy(mlxsw_sp->router->rifs_table); 9999 } 10000 10001 static int mlxsw_sp_rifs_init(struct mlxsw_sp *mlxsw_sp) 10002 { 10003 u64 max_rifs = MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS); 10004 struct devlink *devlink = priv_to_devlink(mlxsw_sp->core); 10005 struct mlxsw_core *core = mlxsw_sp->core; 10006 int err; 10007 10008 if (!MLXSW_CORE_RES_VALID(core, MAX_RIF_MAC_PROFILES)) 10009 return -EIO; 10010 mlxsw_sp->router->max_rif_mac_profile = 10011 MLXSW_CORE_RES_GET(core, MAX_RIF_MAC_PROFILES); 10012 10013 mlxsw_sp->router->rifs = kcalloc(max_rifs, 10014 sizeof(struct mlxsw_sp_rif *), 10015 GFP_KERNEL); 10016 if (!mlxsw_sp->router->rifs) 10017 return -ENOMEM; 10018 10019 err = mlxsw_sp_rifs_table_init(mlxsw_sp); 10020 if (err) 10021 goto err_rifs_table_init; 10022 10023 idr_init(&mlxsw_sp->router->rif_mac_profiles_idr); 10024 atomic_set(&mlxsw_sp->router->rif_mac_profiles_count, 0); 10025 atomic_set(&mlxsw_sp->router->rifs_count, 0); 10026 devl_resource_occ_get_register(devlink, 10027 MLXSW_SP_RESOURCE_RIF_MAC_PROFILES, 10028 mlxsw_sp_rif_mac_profiles_occ_get, 10029 mlxsw_sp); 10030 devl_resource_occ_get_register(devlink, 10031 MLXSW_SP_RESOURCE_RIFS, 10032 mlxsw_sp_rifs_occ_get, 10033 mlxsw_sp); 10034 10035 return 0; 10036 10037 err_rifs_table_init: 10038 kfree(mlxsw_sp->router->rifs); 10039 return err; 10040 } 10041 10042 static void mlxsw_sp_rifs_fini(struct mlxsw_sp *mlxsw_sp) 10043 { 10044 struct devlink *devlink = priv_to_devlink(mlxsw_sp->core); 10045 int i; 10046 10047 WARN_ON_ONCE(atomic_read(&mlxsw_sp->router->rifs_count)); 10048 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS); i++) 10049 WARN_ON_ONCE(mlxsw_sp->router->rifs[i]); 10050 10051 devl_resource_occ_get_unregister(devlink, MLXSW_SP_RESOURCE_RIFS); 10052 devl_resource_occ_get_unregister(devlink, 10053 MLXSW_SP_RESOURCE_RIF_MAC_PROFILES); 10054 WARN_ON(!idr_is_empty(&mlxsw_sp->router->rif_mac_profiles_idr)); 10055 idr_destroy(&mlxsw_sp->router->rif_mac_profiles_idr); 10056 mlxsw_sp_rifs_table_fini(mlxsw_sp); 10057 kfree(mlxsw_sp->router->rifs); 10058 } 10059 10060 static int 10061 mlxsw_sp_ipip_config_tigcr(struct mlxsw_sp *mlxsw_sp) 10062 { 10063 char tigcr_pl[MLXSW_REG_TIGCR_LEN]; 10064 10065 mlxsw_reg_tigcr_pack(tigcr_pl, true, 0); 10066 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(tigcr), tigcr_pl); 10067 } 10068 10069 static int mlxsw_sp_ipips_init(struct mlxsw_sp *mlxsw_sp) 10070 { 10071 int err; 10072 10073 INIT_LIST_HEAD(&mlxsw_sp->router->ipip_list); 10074 10075 err = mlxsw_sp_ipip_ecn_encap_init(mlxsw_sp); 10076 if (err) 10077 return err; 10078 err = mlxsw_sp_ipip_ecn_decap_init(mlxsw_sp); 10079 if (err) 10080 return err; 10081 10082 return mlxsw_sp_ipip_config_tigcr(mlxsw_sp); 10083 } 10084 10085 static int mlxsw_sp1_ipips_init(struct mlxsw_sp *mlxsw_sp) 10086 { 10087 mlxsw_sp->router->ipip_ops_arr = mlxsw_sp1_ipip_ops_arr; 10088 return mlxsw_sp_ipips_init(mlxsw_sp); 10089 } 10090 10091 static int mlxsw_sp2_ipips_init(struct mlxsw_sp *mlxsw_sp) 10092 { 10093 mlxsw_sp->router->ipip_ops_arr = mlxsw_sp2_ipip_ops_arr; 10094 return mlxsw_sp_ipips_init(mlxsw_sp); 10095 } 10096 10097 static void mlxsw_sp_ipips_fini(struct mlxsw_sp *mlxsw_sp) 10098 { 10099 WARN_ON(!list_empty(&mlxsw_sp->router->ipip_list)); 10100 } 10101 10102 static void mlxsw_sp_router_fib_dump_flush(struct notifier_block *nb) 10103 { 10104 struct mlxsw_sp_router *router; 10105 10106 /* Flush pending FIB notifications and then flush the device's 10107 * table before requesting another dump. The FIB notification 10108 * block is unregistered, so no need to take RTNL. 10109 */ 10110 mlxsw_core_flush_owq(); 10111 router = container_of(nb, struct mlxsw_sp_router, fib_nb); 10112 mlxsw_sp_router_fib_flush(router->mlxsw_sp); 10113 } 10114 10115 #ifdef CONFIG_IP_ROUTE_MULTIPATH 10116 struct mlxsw_sp_mp_hash_config { 10117 DECLARE_BITMAP(headers, __MLXSW_REG_RECR2_HEADER_CNT); 10118 DECLARE_BITMAP(fields, __MLXSW_REG_RECR2_FIELD_CNT); 10119 DECLARE_BITMAP(inner_headers, __MLXSW_REG_RECR2_HEADER_CNT); 10120 DECLARE_BITMAP(inner_fields, __MLXSW_REG_RECR2_INNER_FIELD_CNT); 10121 bool inc_parsing_depth; 10122 }; 10123 10124 #define MLXSW_SP_MP_HASH_HEADER_SET(_headers, _header) \ 10125 bitmap_set(_headers, MLXSW_REG_RECR2_##_header, 1) 10126 10127 #define MLXSW_SP_MP_HASH_FIELD_SET(_fields, _field) \ 10128 bitmap_set(_fields, MLXSW_REG_RECR2_##_field, 1) 10129 10130 #define MLXSW_SP_MP_HASH_FIELD_RANGE_SET(_fields, _field, _nr) \ 10131 bitmap_set(_fields, MLXSW_REG_RECR2_##_field, _nr) 10132 10133 static void mlxsw_sp_mp_hash_inner_l3(struct mlxsw_sp_mp_hash_config *config) 10134 { 10135 unsigned long *inner_headers = config->inner_headers; 10136 unsigned long *inner_fields = config->inner_fields; 10137 10138 /* IPv4 inner */ 10139 MLXSW_SP_MP_HASH_HEADER_SET(inner_headers, IPV4_EN_NOT_TCP_NOT_UDP); 10140 MLXSW_SP_MP_HASH_HEADER_SET(inner_headers, IPV4_EN_TCP_UDP); 10141 MLXSW_SP_MP_HASH_FIELD_RANGE_SET(inner_fields, INNER_IPV4_SIP0, 4); 10142 MLXSW_SP_MP_HASH_FIELD_RANGE_SET(inner_fields, INNER_IPV4_DIP0, 4); 10143 /* IPv6 inner */ 10144 MLXSW_SP_MP_HASH_HEADER_SET(inner_headers, IPV6_EN_NOT_TCP_NOT_UDP); 10145 MLXSW_SP_MP_HASH_HEADER_SET(inner_headers, IPV6_EN_TCP_UDP); 10146 MLXSW_SP_MP_HASH_FIELD_SET(inner_fields, INNER_IPV6_SIP0_7); 10147 MLXSW_SP_MP_HASH_FIELD_RANGE_SET(inner_fields, INNER_IPV6_SIP8, 8); 10148 MLXSW_SP_MP_HASH_FIELD_SET(inner_fields, INNER_IPV6_DIP0_7); 10149 MLXSW_SP_MP_HASH_FIELD_RANGE_SET(inner_fields, INNER_IPV6_DIP8, 8); 10150 MLXSW_SP_MP_HASH_FIELD_SET(inner_fields, INNER_IPV6_NEXT_HEADER); 10151 MLXSW_SP_MP_HASH_FIELD_SET(inner_fields, INNER_IPV6_FLOW_LABEL); 10152 } 10153 10154 static void mlxsw_sp_mp4_hash_outer_addr(struct mlxsw_sp_mp_hash_config *config) 10155 { 10156 unsigned long *headers = config->headers; 10157 unsigned long *fields = config->fields; 10158 10159 MLXSW_SP_MP_HASH_HEADER_SET(headers, IPV4_EN_NOT_TCP_NOT_UDP); 10160 MLXSW_SP_MP_HASH_HEADER_SET(headers, IPV4_EN_TCP_UDP); 10161 MLXSW_SP_MP_HASH_FIELD_RANGE_SET(fields, IPV4_SIP0, 4); 10162 MLXSW_SP_MP_HASH_FIELD_RANGE_SET(fields, IPV4_DIP0, 4); 10163 } 10164 10165 static void 10166 mlxsw_sp_mp_hash_inner_custom(struct mlxsw_sp_mp_hash_config *config, 10167 u32 hash_fields) 10168 { 10169 unsigned long *inner_headers = config->inner_headers; 10170 unsigned long *inner_fields = config->inner_fields; 10171 10172 /* IPv4 Inner */ 10173 MLXSW_SP_MP_HASH_HEADER_SET(inner_headers, IPV4_EN_NOT_TCP_NOT_UDP); 10174 MLXSW_SP_MP_HASH_HEADER_SET(inner_headers, IPV4_EN_TCP_UDP); 10175 if (hash_fields & FIB_MULTIPATH_HASH_FIELD_INNER_SRC_IP) 10176 MLXSW_SP_MP_HASH_FIELD_RANGE_SET(inner_fields, INNER_IPV4_SIP0, 4); 10177 if (hash_fields & FIB_MULTIPATH_HASH_FIELD_INNER_DST_IP) 10178 MLXSW_SP_MP_HASH_FIELD_RANGE_SET(inner_fields, INNER_IPV4_DIP0, 4); 10179 if (hash_fields & FIB_MULTIPATH_HASH_FIELD_INNER_IP_PROTO) 10180 MLXSW_SP_MP_HASH_FIELD_SET(inner_fields, INNER_IPV4_PROTOCOL); 10181 /* IPv6 inner */ 10182 MLXSW_SP_MP_HASH_HEADER_SET(inner_headers, IPV6_EN_NOT_TCP_NOT_UDP); 10183 MLXSW_SP_MP_HASH_HEADER_SET(inner_headers, IPV6_EN_TCP_UDP); 10184 if (hash_fields & FIB_MULTIPATH_HASH_FIELD_INNER_SRC_IP) { 10185 MLXSW_SP_MP_HASH_FIELD_SET(inner_fields, INNER_IPV6_SIP0_7); 10186 MLXSW_SP_MP_HASH_FIELD_RANGE_SET(inner_fields, INNER_IPV6_SIP8, 8); 10187 } 10188 if (hash_fields & FIB_MULTIPATH_HASH_FIELD_INNER_DST_IP) { 10189 MLXSW_SP_MP_HASH_FIELD_SET(inner_fields, INNER_IPV6_DIP0_7); 10190 MLXSW_SP_MP_HASH_FIELD_RANGE_SET(inner_fields, INNER_IPV6_DIP8, 8); 10191 } 10192 if (hash_fields & FIB_MULTIPATH_HASH_FIELD_INNER_IP_PROTO) 10193 MLXSW_SP_MP_HASH_FIELD_SET(inner_fields, INNER_IPV6_NEXT_HEADER); 10194 if (hash_fields & FIB_MULTIPATH_HASH_FIELD_INNER_FLOWLABEL) 10195 MLXSW_SP_MP_HASH_FIELD_SET(inner_fields, INNER_IPV6_FLOW_LABEL); 10196 /* L4 inner */ 10197 MLXSW_SP_MP_HASH_HEADER_SET(inner_headers, TCP_UDP_EN_IPV4); 10198 MLXSW_SP_MP_HASH_HEADER_SET(inner_headers, TCP_UDP_EN_IPV6); 10199 if (hash_fields & FIB_MULTIPATH_HASH_FIELD_INNER_SRC_PORT) 10200 MLXSW_SP_MP_HASH_FIELD_SET(inner_fields, INNER_TCP_UDP_SPORT); 10201 if (hash_fields & FIB_MULTIPATH_HASH_FIELD_INNER_DST_PORT) 10202 MLXSW_SP_MP_HASH_FIELD_SET(inner_fields, INNER_TCP_UDP_DPORT); 10203 } 10204 10205 static void mlxsw_sp_mp4_hash_init(struct mlxsw_sp *mlxsw_sp, 10206 struct mlxsw_sp_mp_hash_config *config) 10207 { 10208 struct net *net = mlxsw_sp_net(mlxsw_sp); 10209 unsigned long *headers = config->headers; 10210 unsigned long *fields = config->fields; 10211 u32 hash_fields; 10212 10213 switch (READ_ONCE(net->ipv4.sysctl_fib_multipath_hash_policy)) { 10214 case 0: 10215 mlxsw_sp_mp4_hash_outer_addr(config); 10216 break; 10217 case 1: 10218 mlxsw_sp_mp4_hash_outer_addr(config); 10219 MLXSW_SP_MP_HASH_HEADER_SET(headers, TCP_UDP_EN_IPV4); 10220 MLXSW_SP_MP_HASH_FIELD_SET(fields, IPV4_PROTOCOL); 10221 MLXSW_SP_MP_HASH_FIELD_SET(fields, TCP_UDP_SPORT); 10222 MLXSW_SP_MP_HASH_FIELD_SET(fields, TCP_UDP_DPORT); 10223 break; 10224 case 2: 10225 /* Outer */ 10226 mlxsw_sp_mp4_hash_outer_addr(config); 10227 /* Inner */ 10228 mlxsw_sp_mp_hash_inner_l3(config); 10229 break; 10230 case 3: 10231 hash_fields = READ_ONCE(net->ipv4.sysctl_fib_multipath_hash_fields); 10232 /* Outer */ 10233 MLXSW_SP_MP_HASH_HEADER_SET(headers, IPV4_EN_NOT_TCP_NOT_UDP); 10234 MLXSW_SP_MP_HASH_HEADER_SET(headers, IPV4_EN_TCP_UDP); 10235 MLXSW_SP_MP_HASH_HEADER_SET(headers, TCP_UDP_EN_IPV4); 10236 if (hash_fields & FIB_MULTIPATH_HASH_FIELD_SRC_IP) 10237 MLXSW_SP_MP_HASH_FIELD_RANGE_SET(fields, IPV4_SIP0, 4); 10238 if (hash_fields & FIB_MULTIPATH_HASH_FIELD_DST_IP) 10239 MLXSW_SP_MP_HASH_FIELD_RANGE_SET(fields, IPV4_DIP0, 4); 10240 if (hash_fields & FIB_MULTIPATH_HASH_FIELD_IP_PROTO) 10241 MLXSW_SP_MP_HASH_FIELD_SET(fields, IPV4_PROTOCOL); 10242 if (hash_fields & FIB_MULTIPATH_HASH_FIELD_SRC_PORT) 10243 MLXSW_SP_MP_HASH_FIELD_SET(fields, TCP_UDP_SPORT); 10244 if (hash_fields & FIB_MULTIPATH_HASH_FIELD_DST_PORT) 10245 MLXSW_SP_MP_HASH_FIELD_SET(fields, TCP_UDP_DPORT); 10246 /* Inner */ 10247 mlxsw_sp_mp_hash_inner_custom(config, hash_fields); 10248 break; 10249 } 10250 } 10251 10252 static void mlxsw_sp_mp6_hash_outer_addr(struct mlxsw_sp_mp_hash_config *config) 10253 { 10254 unsigned long *headers = config->headers; 10255 unsigned long *fields = config->fields; 10256 10257 MLXSW_SP_MP_HASH_HEADER_SET(headers, IPV6_EN_NOT_TCP_NOT_UDP); 10258 MLXSW_SP_MP_HASH_HEADER_SET(headers, IPV6_EN_TCP_UDP); 10259 MLXSW_SP_MP_HASH_FIELD_SET(fields, IPV6_SIP0_7); 10260 MLXSW_SP_MP_HASH_FIELD_RANGE_SET(fields, IPV6_SIP8, 8); 10261 MLXSW_SP_MP_HASH_FIELD_SET(fields, IPV6_DIP0_7); 10262 MLXSW_SP_MP_HASH_FIELD_RANGE_SET(fields, IPV6_DIP8, 8); 10263 } 10264 10265 static void mlxsw_sp_mp6_hash_init(struct mlxsw_sp *mlxsw_sp, 10266 struct mlxsw_sp_mp_hash_config *config) 10267 { 10268 u32 hash_fields = ip6_multipath_hash_fields(mlxsw_sp_net(mlxsw_sp)); 10269 unsigned long *headers = config->headers; 10270 unsigned long *fields = config->fields; 10271 10272 switch (ip6_multipath_hash_policy(mlxsw_sp_net(mlxsw_sp))) { 10273 case 0: 10274 mlxsw_sp_mp6_hash_outer_addr(config); 10275 MLXSW_SP_MP_HASH_FIELD_SET(fields, IPV6_NEXT_HEADER); 10276 MLXSW_SP_MP_HASH_FIELD_SET(fields, IPV6_FLOW_LABEL); 10277 break; 10278 case 1: 10279 mlxsw_sp_mp6_hash_outer_addr(config); 10280 MLXSW_SP_MP_HASH_HEADER_SET(headers, TCP_UDP_EN_IPV6); 10281 MLXSW_SP_MP_HASH_FIELD_SET(fields, IPV6_NEXT_HEADER); 10282 MLXSW_SP_MP_HASH_FIELD_SET(fields, TCP_UDP_SPORT); 10283 MLXSW_SP_MP_HASH_FIELD_SET(fields, TCP_UDP_DPORT); 10284 break; 10285 case 2: 10286 /* Outer */ 10287 mlxsw_sp_mp6_hash_outer_addr(config); 10288 MLXSW_SP_MP_HASH_FIELD_SET(fields, IPV6_NEXT_HEADER); 10289 MLXSW_SP_MP_HASH_FIELD_SET(fields, IPV6_FLOW_LABEL); 10290 /* Inner */ 10291 mlxsw_sp_mp_hash_inner_l3(config); 10292 config->inc_parsing_depth = true; 10293 break; 10294 case 3: 10295 /* Outer */ 10296 MLXSW_SP_MP_HASH_HEADER_SET(headers, IPV6_EN_NOT_TCP_NOT_UDP); 10297 MLXSW_SP_MP_HASH_HEADER_SET(headers, IPV6_EN_TCP_UDP); 10298 MLXSW_SP_MP_HASH_HEADER_SET(headers, TCP_UDP_EN_IPV6); 10299 if (hash_fields & FIB_MULTIPATH_HASH_FIELD_SRC_IP) { 10300 MLXSW_SP_MP_HASH_FIELD_SET(fields, IPV6_SIP0_7); 10301 MLXSW_SP_MP_HASH_FIELD_RANGE_SET(fields, IPV6_SIP8, 8); 10302 } 10303 if (hash_fields & FIB_MULTIPATH_HASH_FIELD_DST_IP) { 10304 MLXSW_SP_MP_HASH_FIELD_SET(fields, IPV6_DIP0_7); 10305 MLXSW_SP_MP_HASH_FIELD_RANGE_SET(fields, IPV6_DIP8, 8); 10306 } 10307 if (hash_fields & FIB_MULTIPATH_HASH_FIELD_IP_PROTO) 10308 MLXSW_SP_MP_HASH_FIELD_SET(fields, IPV6_NEXT_HEADER); 10309 if (hash_fields & FIB_MULTIPATH_HASH_FIELD_FLOWLABEL) 10310 MLXSW_SP_MP_HASH_FIELD_SET(fields, IPV6_FLOW_LABEL); 10311 if (hash_fields & FIB_MULTIPATH_HASH_FIELD_SRC_PORT) 10312 MLXSW_SP_MP_HASH_FIELD_SET(fields, TCP_UDP_SPORT); 10313 if (hash_fields & FIB_MULTIPATH_HASH_FIELD_DST_PORT) 10314 MLXSW_SP_MP_HASH_FIELD_SET(fields, TCP_UDP_DPORT); 10315 /* Inner */ 10316 mlxsw_sp_mp_hash_inner_custom(config, hash_fields); 10317 if (hash_fields & FIB_MULTIPATH_HASH_FIELD_INNER_MASK) 10318 config->inc_parsing_depth = true; 10319 break; 10320 } 10321 } 10322 10323 static int mlxsw_sp_mp_hash_parsing_depth_adjust(struct mlxsw_sp *mlxsw_sp, 10324 bool old_inc_parsing_depth, 10325 bool new_inc_parsing_depth) 10326 { 10327 int err; 10328 10329 if (!old_inc_parsing_depth && new_inc_parsing_depth) { 10330 err = mlxsw_sp_parsing_depth_inc(mlxsw_sp); 10331 if (err) 10332 return err; 10333 mlxsw_sp->router->inc_parsing_depth = true; 10334 } else if (old_inc_parsing_depth && !new_inc_parsing_depth) { 10335 mlxsw_sp_parsing_depth_dec(mlxsw_sp); 10336 mlxsw_sp->router->inc_parsing_depth = false; 10337 } 10338 10339 return 0; 10340 } 10341 10342 static int mlxsw_sp_mp_hash_init(struct mlxsw_sp *mlxsw_sp) 10343 { 10344 bool old_inc_parsing_depth, new_inc_parsing_depth; 10345 struct mlxsw_sp_mp_hash_config config = {}; 10346 char recr2_pl[MLXSW_REG_RECR2_LEN]; 10347 unsigned long bit; 10348 u32 seed; 10349 int err; 10350 10351 seed = jhash(mlxsw_sp->base_mac, sizeof(mlxsw_sp->base_mac), 0); 10352 mlxsw_reg_recr2_pack(recr2_pl, seed); 10353 mlxsw_sp_mp4_hash_init(mlxsw_sp, &config); 10354 mlxsw_sp_mp6_hash_init(mlxsw_sp, &config); 10355 10356 old_inc_parsing_depth = mlxsw_sp->router->inc_parsing_depth; 10357 new_inc_parsing_depth = config.inc_parsing_depth; 10358 err = mlxsw_sp_mp_hash_parsing_depth_adjust(mlxsw_sp, 10359 old_inc_parsing_depth, 10360 new_inc_parsing_depth); 10361 if (err) 10362 return err; 10363 10364 for_each_set_bit(bit, config.headers, __MLXSW_REG_RECR2_HEADER_CNT) 10365 mlxsw_reg_recr2_outer_header_enables_set(recr2_pl, bit, 1); 10366 for_each_set_bit(bit, config.fields, __MLXSW_REG_RECR2_FIELD_CNT) 10367 mlxsw_reg_recr2_outer_header_fields_enable_set(recr2_pl, bit, 1); 10368 for_each_set_bit(bit, config.inner_headers, __MLXSW_REG_RECR2_HEADER_CNT) 10369 mlxsw_reg_recr2_inner_header_enables_set(recr2_pl, bit, 1); 10370 for_each_set_bit(bit, config.inner_fields, __MLXSW_REG_RECR2_INNER_FIELD_CNT) 10371 mlxsw_reg_recr2_inner_header_fields_enable_set(recr2_pl, bit, 1); 10372 10373 err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(recr2), recr2_pl); 10374 if (err) 10375 goto err_reg_write; 10376 10377 return 0; 10378 10379 err_reg_write: 10380 mlxsw_sp_mp_hash_parsing_depth_adjust(mlxsw_sp, new_inc_parsing_depth, 10381 old_inc_parsing_depth); 10382 return err; 10383 } 10384 #else 10385 static int mlxsw_sp_mp_hash_init(struct mlxsw_sp *mlxsw_sp) 10386 { 10387 return 0; 10388 } 10389 #endif 10390 10391 static int mlxsw_sp_dscp_init(struct mlxsw_sp *mlxsw_sp) 10392 { 10393 char rdpm_pl[MLXSW_REG_RDPM_LEN]; 10394 unsigned int i; 10395 10396 MLXSW_REG_ZERO(rdpm, rdpm_pl); 10397 10398 /* HW is determining switch priority based on DSCP-bits, but the 10399 * kernel is still doing that based on the ToS. Since there's a 10400 * mismatch in bits we need to make sure to translate the right 10401 * value ToS would observe, skipping the 2 least-significant ECN bits. 10402 */ 10403 for (i = 0; i < MLXSW_REG_RDPM_DSCP_ENTRY_REC_MAX_COUNT; i++) 10404 mlxsw_reg_rdpm_pack(rdpm_pl, i, rt_tos2priority(i << 2)); 10405 10406 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rdpm), rdpm_pl); 10407 } 10408 10409 static int __mlxsw_sp_router_init(struct mlxsw_sp *mlxsw_sp) 10410 { 10411 struct net *net = mlxsw_sp_net(mlxsw_sp); 10412 char rgcr_pl[MLXSW_REG_RGCR_LEN]; 10413 u64 max_rifs; 10414 bool usp; 10415 10416 if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, MAX_RIFS)) 10417 return -EIO; 10418 max_rifs = MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS); 10419 usp = READ_ONCE(net->ipv4.sysctl_ip_fwd_update_priority); 10420 10421 mlxsw_reg_rgcr_pack(rgcr_pl, true, true); 10422 mlxsw_reg_rgcr_max_router_interfaces_set(rgcr_pl, max_rifs); 10423 mlxsw_reg_rgcr_usp_set(rgcr_pl, usp); 10424 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rgcr), rgcr_pl); 10425 } 10426 10427 static void __mlxsw_sp_router_fini(struct mlxsw_sp *mlxsw_sp) 10428 { 10429 char rgcr_pl[MLXSW_REG_RGCR_LEN]; 10430 10431 mlxsw_reg_rgcr_pack(rgcr_pl, false, false); 10432 mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rgcr), rgcr_pl); 10433 } 10434 10435 static int mlxsw_sp_lb_rif_init(struct mlxsw_sp *mlxsw_sp) 10436 { 10437 u16 lb_rif_index; 10438 int err; 10439 10440 /* Create a generic loopback RIF associated with the main table 10441 * (default VRF). Any table can be used, but the main table exists 10442 * anyway, so we do not waste resources. 10443 */ 10444 err = mlxsw_sp_router_ul_rif_get(mlxsw_sp, RT_TABLE_MAIN, 10445 &lb_rif_index); 10446 if (err) 10447 return err; 10448 10449 mlxsw_sp->router->lb_rif_index = lb_rif_index; 10450 10451 return 0; 10452 } 10453 10454 static void mlxsw_sp_lb_rif_fini(struct mlxsw_sp *mlxsw_sp) 10455 { 10456 mlxsw_sp_router_ul_rif_put(mlxsw_sp, mlxsw_sp->router->lb_rif_index); 10457 } 10458 10459 static int mlxsw_sp1_router_init(struct mlxsw_sp *mlxsw_sp) 10460 { 10461 size_t size_ranges_count = ARRAY_SIZE(mlxsw_sp1_adj_grp_size_ranges); 10462 10463 mlxsw_sp->router->rif_ops_arr = mlxsw_sp1_rif_ops_arr; 10464 mlxsw_sp->router->adj_grp_size_ranges = mlxsw_sp1_adj_grp_size_ranges; 10465 mlxsw_sp->router->adj_grp_size_ranges_count = size_ranges_count; 10466 10467 return 0; 10468 } 10469 10470 const struct mlxsw_sp_router_ops mlxsw_sp1_router_ops = { 10471 .init = mlxsw_sp1_router_init, 10472 .ipips_init = mlxsw_sp1_ipips_init, 10473 }; 10474 10475 static int mlxsw_sp2_router_init(struct mlxsw_sp *mlxsw_sp) 10476 { 10477 size_t size_ranges_count = ARRAY_SIZE(mlxsw_sp2_adj_grp_size_ranges); 10478 10479 mlxsw_sp->router->rif_ops_arr = mlxsw_sp2_rif_ops_arr; 10480 mlxsw_sp->router->adj_grp_size_ranges = mlxsw_sp2_adj_grp_size_ranges; 10481 mlxsw_sp->router->adj_grp_size_ranges_count = size_ranges_count; 10482 10483 return 0; 10484 } 10485 10486 const struct mlxsw_sp_router_ops mlxsw_sp2_router_ops = { 10487 .init = mlxsw_sp2_router_init, 10488 .ipips_init = mlxsw_sp2_ipips_init, 10489 }; 10490 10491 int mlxsw_sp_router_init(struct mlxsw_sp *mlxsw_sp, 10492 struct netlink_ext_ack *extack) 10493 { 10494 struct mlxsw_sp_router *router; 10495 int err; 10496 10497 router = kzalloc(sizeof(*mlxsw_sp->router), GFP_KERNEL); 10498 if (!router) 10499 return -ENOMEM; 10500 mutex_init(&router->lock); 10501 mlxsw_sp->router = router; 10502 router->mlxsw_sp = mlxsw_sp; 10503 10504 err = mlxsw_sp->router_ops->init(mlxsw_sp); 10505 if (err) 10506 goto err_router_ops_init; 10507 10508 INIT_LIST_HEAD(&mlxsw_sp->router->nh_res_grp_list); 10509 INIT_DELAYED_WORK(&mlxsw_sp->router->nh_grp_activity_dw, 10510 mlxsw_sp_nh_grp_activity_work); 10511 INIT_LIST_HEAD(&mlxsw_sp->router->nexthop_neighs_list); 10512 err = __mlxsw_sp_router_init(mlxsw_sp); 10513 if (err) 10514 goto err_router_init; 10515 10516 err = mlxsw_sp_rifs_init(mlxsw_sp); 10517 if (err) 10518 goto err_rifs_init; 10519 10520 err = mlxsw_sp->router_ops->ipips_init(mlxsw_sp); 10521 if (err) 10522 goto err_ipips_init; 10523 10524 err = rhashtable_init(&mlxsw_sp->router->nexthop_ht, 10525 &mlxsw_sp_nexthop_ht_params); 10526 if (err) 10527 goto err_nexthop_ht_init; 10528 10529 err = rhashtable_init(&mlxsw_sp->router->nexthop_group_ht, 10530 &mlxsw_sp_nexthop_group_ht_params); 10531 if (err) 10532 goto err_nexthop_group_ht_init; 10533 10534 INIT_LIST_HEAD(&mlxsw_sp->router->nexthop_list); 10535 err = mlxsw_sp_lpm_init(mlxsw_sp); 10536 if (err) 10537 goto err_lpm_init; 10538 10539 err = mlxsw_sp_mr_init(mlxsw_sp, &mlxsw_sp_mr_tcam_ops); 10540 if (err) 10541 goto err_mr_init; 10542 10543 err = mlxsw_sp_vrs_init(mlxsw_sp); 10544 if (err) 10545 goto err_vrs_init; 10546 10547 err = mlxsw_sp_lb_rif_init(mlxsw_sp); 10548 if (err) 10549 goto err_lb_rif_init; 10550 10551 err = mlxsw_sp_neigh_init(mlxsw_sp); 10552 if (err) 10553 goto err_neigh_init; 10554 10555 err = mlxsw_sp_mp_hash_init(mlxsw_sp); 10556 if (err) 10557 goto err_mp_hash_init; 10558 10559 err = mlxsw_sp_dscp_init(mlxsw_sp); 10560 if (err) 10561 goto err_dscp_init; 10562 10563 router->inetaddr_nb.notifier_call = mlxsw_sp_inetaddr_event; 10564 err = register_inetaddr_notifier(&router->inetaddr_nb); 10565 if (err) 10566 goto err_register_inetaddr_notifier; 10567 10568 router->inet6addr_nb.notifier_call = mlxsw_sp_inet6addr_event; 10569 err = register_inet6addr_notifier(&router->inet6addr_nb); 10570 if (err) 10571 goto err_register_inet6addr_notifier; 10572 10573 mlxsw_sp->router->netevent_nb.notifier_call = 10574 mlxsw_sp_router_netevent_event; 10575 err = register_netevent_notifier(&mlxsw_sp->router->netevent_nb); 10576 if (err) 10577 goto err_register_netevent_notifier; 10578 10579 mlxsw_sp->router->nexthop_nb.notifier_call = 10580 mlxsw_sp_nexthop_obj_event; 10581 err = register_nexthop_notifier(mlxsw_sp_net(mlxsw_sp), 10582 &mlxsw_sp->router->nexthop_nb, 10583 extack); 10584 if (err) 10585 goto err_register_nexthop_notifier; 10586 10587 mlxsw_sp->router->fib_nb.notifier_call = mlxsw_sp_router_fib_event; 10588 err = register_fib_notifier(mlxsw_sp_net(mlxsw_sp), 10589 &mlxsw_sp->router->fib_nb, 10590 mlxsw_sp_router_fib_dump_flush, extack); 10591 if (err) 10592 goto err_register_fib_notifier; 10593 10594 mlxsw_sp->router->netdevice_nb.notifier_call = 10595 mlxsw_sp_router_netdevice_event; 10596 err = register_netdevice_notifier_net(mlxsw_sp_net(mlxsw_sp), 10597 &mlxsw_sp->router->netdevice_nb); 10598 if (err) 10599 goto err_register_netdev_notifier; 10600 10601 return 0; 10602 10603 err_register_netdev_notifier: 10604 unregister_fib_notifier(mlxsw_sp_net(mlxsw_sp), 10605 &mlxsw_sp->router->fib_nb); 10606 err_register_fib_notifier: 10607 unregister_nexthop_notifier(mlxsw_sp_net(mlxsw_sp), 10608 &mlxsw_sp->router->nexthop_nb); 10609 err_register_nexthop_notifier: 10610 unregister_netevent_notifier(&mlxsw_sp->router->netevent_nb); 10611 err_register_netevent_notifier: 10612 unregister_inet6addr_notifier(&router->inet6addr_nb); 10613 err_register_inet6addr_notifier: 10614 unregister_inetaddr_notifier(&router->inetaddr_nb); 10615 err_register_inetaddr_notifier: 10616 mlxsw_core_flush_owq(); 10617 err_dscp_init: 10618 err_mp_hash_init: 10619 mlxsw_sp_neigh_fini(mlxsw_sp); 10620 err_neigh_init: 10621 mlxsw_sp_lb_rif_fini(mlxsw_sp); 10622 err_lb_rif_init: 10623 mlxsw_sp_vrs_fini(mlxsw_sp); 10624 err_vrs_init: 10625 mlxsw_sp_mr_fini(mlxsw_sp); 10626 err_mr_init: 10627 mlxsw_sp_lpm_fini(mlxsw_sp); 10628 err_lpm_init: 10629 rhashtable_destroy(&mlxsw_sp->router->nexthop_group_ht); 10630 err_nexthop_group_ht_init: 10631 rhashtable_destroy(&mlxsw_sp->router->nexthop_ht); 10632 err_nexthop_ht_init: 10633 mlxsw_sp_ipips_fini(mlxsw_sp); 10634 err_ipips_init: 10635 mlxsw_sp_rifs_fini(mlxsw_sp); 10636 err_rifs_init: 10637 __mlxsw_sp_router_fini(mlxsw_sp); 10638 err_router_init: 10639 cancel_delayed_work_sync(&mlxsw_sp->router->nh_grp_activity_dw); 10640 err_router_ops_init: 10641 mutex_destroy(&mlxsw_sp->router->lock); 10642 kfree(mlxsw_sp->router); 10643 return err; 10644 } 10645 10646 void mlxsw_sp_router_fini(struct mlxsw_sp *mlxsw_sp) 10647 { 10648 unregister_netdevice_notifier_net(mlxsw_sp_net(mlxsw_sp), 10649 &mlxsw_sp->router->netdevice_nb); 10650 unregister_fib_notifier(mlxsw_sp_net(mlxsw_sp), 10651 &mlxsw_sp->router->fib_nb); 10652 unregister_nexthop_notifier(mlxsw_sp_net(mlxsw_sp), 10653 &mlxsw_sp->router->nexthop_nb); 10654 unregister_netevent_notifier(&mlxsw_sp->router->netevent_nb); 10655 unregister_inet6addr_notifier(&mlxsw_sp->router->inet6addr_nb); 10656 unregister_inetaddr_notifier(&mlxsw_sp->router->inetaddr_nb); 10657 mlxsw_core_flush_owq(); 10658 mlxsw_sp_neigh_fini(mlxsw_sp); 10659 mlxsw_sp_lb_rif_fini(mlxsw_sp); 10660 mlxsw_sp_vrs_fini(mlxsw_sp); 10661 mlxsw_sp_mr_fini(mlxsw_sp); 10662 mlxsw_sp_lpm_fini(mlxsw_sp); 10663 rhashtable_destroy(&mlxsw_sp->router->nexthop_group_ht); 10664 rhashtable_destroy(&mlxsw_sp->router->nexthop_ht); 10665 mlxsw_sp_ipips_fini(mlxsw_sp); 10666 mlxsw_sp_rifs_fini(mlxsw_sp); 10667 __mlxsw_sp_router_fini(mlxsw_sp); 10668 cancel_delayed_work_sync(&mlxsw_sp->router->nh_grp_activity_dw); 10669 mutex_destroy(&mlxsw_sp->router->lock); 10670 kfree(mlxsw_sp->router); 10671 } 10672