1 /* 2 * drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c 3 * Copyright (c) 2016-2017 Mellanox Technologies. All rights reserved. 4 * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com> 5 * Copyright (c) 2016 Ido Schimmel <idosch@mellanox.com> 6 * Copyright (c) 2016 Yotam Gigi <yotamg@mellanox.com> 7 * Copyright (c) 2017 Petr Machata <petrm@mellanox.com> 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the names of the copyright holders nor the names of its 18 * contributors may be used to endorse or promote products derived from 19 * this software without specific prior written permission. 20 * 21 * Alternatively, this software may be distributed under the terms of the 22 * GNU General Public License ("GPL") version 2 as published by the Free 23 * Software Foundation. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 26 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 29 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 #include <linux/kernel.h> 39 #include <linux/types.h> 40 #include <linux/rhashtable.h> 41 #include <linux/bitops.h> 42 #include <linux/in6.h> 43 #include <linux/notifier.h> 44 #include <linux/inetdevice.h> 45 #include <linux/netdevice.h> 46 #include <linux/if_bridge.h> 47 #include <linux/socket.h> 48 #include <linux/route.h> 49 #include <linux/gcd.h> 50 #include <linux/random.h> 51 #include <net/netevent.h> 52 #include <net/neighbour.h> 53 #include <net/arp.h> 54 #include <net/ip_fib.h> 55 #include <net/ip6_fib.h> 56 #include <net/fib_rules.h> 57 #include <net/ip_tunnels.h> 58 #include <net/l3mdev.h> 59 #include <net/addrconf.h> 60 #include <net/ndisc.h> 61 #include <net/ipv6.h> 62 #include <net/fib_notifier.h> 63 64 #include "spectrum.h" 65 #include "core.h" 66 #include "reg.h" 67 #include "spectrum_cnt.h" 68 #include "spectrum_dpipe.h" 69 #include "spectrum_ipip.h" 70 #include "spectrum_mr.h" 71 #include "spectrum_mr_tcam.h" 72 #include "spectrum_router.h" 73 74 struct mlxsw_sp_vr; 75 struct mlxsw_sp_lpm_tree; 76 struct mlxsw_sp_rif_ops; 77 78 struct mlxsw_sp_router { 79 struct mlxsw_sp *mlxsw_sp; 80 struct mlxsw_sp_rif **rifs; 81 struct mlxsw_sp_vr *vrs; 82 struct rhashtable neigh_ht; 83 struct rhashtable nexthop_group_ht; 84 struct rhashtable nexthop_ht; 85 struct list_head nexthop_list; 86 struct { 87 struct mlxsw_sp_lpm_tree *trees; 88 unsigned int tree_count; 89 } lpm; 90 struct { 91 struct delayed_work dw; 92 unsigned long interval; /* ms */ 93 } neighs_update; 94 struct delayed_work nexthop_probe_dw; 95 #define MLXSW_SP_UNRESOLVED_NH_PROBE_INTERVAL 5000 /* ms */ 96 struct list_head nexthop_neighs_list; 97 struct list_head ipip_list; 98 bool aborted; 99 struct notifier_block fib_nb; 100 struct notifier_block netevent_nb; 101 const struct mlxsw_sp_rif_ops **rif_ops_arr; 102 const struct mlxsw_sp_ipip_ops **ipip_ops_arr; 103 }; 104 105 struct mlxsw_sp_rif { 106 struct list_head nexthop_list; 107 struct list_head neigh_list; 108 struct net_device *dev; 109 struct mlxsw_sp_fid *fid; 110 unsigned char addr[ETH_ALEN]; 111 int mtu; 112 u16 rif_index; 113 u16 vr_id; 114 const struct mlxsw_sp_rif_ops *ops; 115 struct mlxsw_sp *mlxsw_sp; 116 117 unsigned int counter_ingress; 118 bool counter_ingress_valid; 119 unsigned int counter_egress; 120 bool counter_egress_valid; 121 }; 122 123 struct mlxsw_sp_rif_params { 124 struct net_device *dev; 125 union { 126 u16 system_port; 127 u16 lag_id; 128 }; 129 u16 vid; 130 bool lag; 131 }; 132 133 struct mlxsw_sp_rif_subport { 134 struct mlxsw_sp_rif common; 135 union { 136 u16 system_port; 137 u16 lag_id; 138 }; 139 u16 vid; 140 bool lag; 141 }; 142 143 struct mlxsw_sp_rif_ipip_lb { 144 struct mlxsw_sp_rif common; 145 struct mlxsw_sp_rif_ipip_lb_config lb_config; 146 u16 ul_vr_id; /* Reserved for Spectrum-2. */ 147 }; 148 149 struct mlxsw_sp_rif_params_ipip_lb { 150 struct mlxsw_sp_rif_params common; 151 struct mlxsw_sp_rif_ipip_lb_config lb_config; 152 }; 153 154 struct mlxsw_sp_rif_ops { 155 enum mlxsw_sp_rif_type type; 156 size_t rif_size; 157 158 void (*setup)(struct mlxsw_sp_rif *rif, 159 const struct mlxsw_sp_rif_params *params); 160 int (*configure)(struct mlxsw_sp_rif *rif); 161 void (*deconfigure)(struct mlxsw_sp_rif *rif); 162 struct mlxsw_sp_fid * (*fid_get)(struct mlxsw_sp_rif *rif); 163 }; 164 165 static unsigned int * 166 mlxsw_sp_rif_p_counter_get(struct mlxsw_sp_rif *rif, 167 enum mlxsw_sp_rif_counter_dir dir) 168 { 169 switch (dir) { 170 case MLXSW_SP_RIF_COUNTER_EGRESS: 171 return &rif->counter_egress; 172 case MLXSW_SP_RIF_COUNTER_INGRESS: 173 return &rif->counter_ingress; 174 } 175 return NULL; 176 } 177 178 static bool 179 mlxsw_sp_rif_counter_valid_get(struct mlxsw_sp_rif *rif, 180 enum mlxsw_sp_rif_counter_dir dir) 181 { 182 switch (dir) { 183 case MLXSW_SP_RIF_COUNTER_EGRESS: 184 return rif->counter_egress_valid; 185 case MLXSW_SP_RIF_COUNTER_INGRESS: 186 return rif->counter_ingress_valid; 187 } 188 return false; 189 } 190 191 static void 192 mlxsw_sp_rif_counter_valid_set(struct mlxsw_sp_rif *rif, 193 enum mlxsw_sp_rif_counter_dir dir, 194 bool valid) 195 { 196 switch (dir) { 197 case MLXSW_SP_RIF_COUNTER_EGRESS: 198 rif->counter_egress_valid = valid; 199 break; 200 case MLXSW_SP_RIF_COUNTER_INGRESS: 201 rif->counter_ingress_valid = valid; 202 break; 203 } 204 } 205 206 static int mlxsw_sp_rif_counter_edit(struct mlxsw_sp *mlxsw_sp, u16 rif_index, 207 unsigned int counter_index, bool enable, 208 enum mlxsw_sp_rif_counter_dir dir) 209 { 210 char ritr_pl[MLXSW_REG_RITR_LEN]; 211 bool is_egress = false; 212 int err; 213 214 if (dir == MLXSW_SP_RIF_COUNTER_EGRESS) 215 is_egress = true; 216 mlxsw_reg_ritr_rif_pack(ritr_pl, rif_index); 217 err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 218 if (err) 219 return err; 220 221 mlxsw_reg_ritr_counter_pack(ritr_pl, counter_index, enable, 222 is_egress); 223 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 224 } 225 226 int mlxsw_sp_rif_counter_value_get(struct mlxsw_sp *mlxsw_sp, 227 struct mlxsw_sp_rif *rif, 228 enum mlxsw_sp_rif_counter_dir dir, u64 *cnt) 229 { 230 char ricnt_pl[MLXSW_REG_RICNT_LEN]; 231 unsigned int *p_counter_index; 232 bool valid; 233 int err; 234 235 valid = mlxsw_sp_rif_counter_valid_get(rif, dir); 236 if (!valid) 237 return -EINVAL; 238 239 p_counter_index = mlxsw_sp_rif_p_counter_get(rif, dir); 240 if (!p_counter_index) 241 return -EINVAL; 242 mlxsw_reg_ricnt_pack(ricnt_pl, *p_counter_index, 243 MLXSW_REG_RICNT_OPCODE_NOP); 244 err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ricnt), ricnt_pl); 245 if (err) 246 return err; 247 *cnt = mlxsw_reg_ricnt_good_unicast_packets_get(ricnt_pl); 248 return 0; 249 } 250 251 static int mlxsw_sp_rif_counter_clear(struct mlxsw_sp *mlxsw_sp, 252 unsigned int counter_index) 253 { 254 char ricnt_pl[MLXSW_REG_RICNT_LEN]; 255 256 mlxsw_reg_ricnt_pack(ricnt_pl, counter_index, 257 MLXSW_REG_RICNT_OPCODE_CLEAR); 258 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ricnt), ricnt_pl); 259 } 260 261 int mlxsw_sp_rif_counter_alloc(struct mlxsw_sp *mlxsw_sp, 262 struct mlxsw_sp_rif *rif, 263 enum mlxsw_sp_rif_counter_dir dir) 264 { 265 unsigned int *p_counter_index; 266 int err; 267 268 p_counter_index = mlxsw_sp_rif_p_counter_get(rif, dir); 269 if (!p_counter_index) 270 return -EINVAL; 271 err = mlxsw_sp_counter_alloc(mlxsw_sp, MLXSW_SP_COUNTER_SUB_POOL_RIF, 272 p_counter_index); 273 if (err) 274 return err; 275 276 err = mlxsw_sp_rif_counter_clear(mlxsw_sp, *p_counter_index); 277 if (err) 278 goto err_counter_clear; 279 280 err = mlxsw_sp_rif_counter_edit(mlxsw_sp, rif->rif_index, 281 *p_counter_index, true, dir); 282 if (err) 283 goto err_counter_edit; 284 mlxsw_sp_rif_counter_valid_set(rif, dir, true); 285 return 0; 286 287 err_counter_edit: 288 err_counter_clear: 289 mlxsw_sp_counter_free(mlxsw_sp, MLXSW_SP_COUNTER_SUB_POOL_RIF, 290 *p_counter_index); 291 return err; 292 } 293 294 void mlxsw_sp_rif_counter_free(struct mlxsw_sp *mlxsw_sp, 295 struct mlxsw_sp_rif *rif, 296 enum mlxsw_sp_rif_counter_dir dir) 297 { 298 unsigned int *p_counter_index; 299 300 if (!mlxsw_sp_rif_counter_valid_get(rif, dir)) 301 return; 302 303 p_counter_index = mlxsw_sp_rif_p_counter_get(rif, dir); 304 if (WARN_ON(!p_counter_index)) 305 return; 306 mlxsw_sp_rif_counter_edit(mlxsw_sp, rif->rif_index, 307 *p_counter_index, false, dir); 308 mlxsw_sp_counter_free(mlxsw_sp, MLXSW_SP_COUNTER_SUB_POOL_RIF, 309 *p_counter_index); 310 mlxsw_sp_rif_counter_valid_set(rif, dir, false); 311 } 312 313 static void mlxsw_sp_rif_counters_alloc(struct mlxsw_sp_rif *rif) 314 { 315 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 316 struct devlink *devlink; 317 318 devlink = priv_to_devlink(mlxsw_sp->core); 319 if (!devlink_dpipe_table_counter_enabled(devlink, 320 MLXSW_SP_DPIPE_TABLE_NAME_ERIF)) 321 return; 322 mlxsw_sp_rif_counter_alloc(mlxsw_sp, rif, MLXSW_SP_RIF_COUNTER_EGRESS); 323 } 324 325 static void mlxsw_sp_rif_counters_free(struct mlxsw_sp_rif *rif) 326 { 327 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 328 329 mlxsw_sp_rif_counter_free(mlxsw_sp, rif, MLXSW_SP_RIF_COUNTER_EGRESS); 330 } 331 332 static struct mlxsw_sp_rif * 333 mlxsw_sp_rif_find_by_dev(const struct mlxsw_sp *mlxsw_sp, 334 const struct net_device *dev); 335 336 #define MLXSW_SP_PREFIX_COUNT (sizeof(struct in6_addr) * BITS_PER_BYTE + 1) 337 338 struct mlxsw_sp_prefix_usage { 339 DECLARE_BITMAP(b, MLXSW_SP_PREFIX_COUNT); 340 }; 341 342 #define mlxsw_sp_prefix_usage_for_each(prefix, prefix_usage) \ 343 for_each_set_bit(prefix, (prefix_usage)->b, MLXSW_SP_PREFIX_COUNT) 344 345 static bool 346 mlxsw_sp_prefix_usage_eq(struct mlxsw_sp_prefix_usage *prefix_usage1, 347 struct mlxsw_sp_prefix_usage *prefix_usage2) 348 { 349 return !memcmp(prefix_usage1, prefix_usage2, sizeof(*prefix_usage1)); 350 } 351 352 static bool 353 mlxsw_sp_prefix_usage_none(struct mlxsw_sp_prefix_usage *prefix_usage) 354 { 355 struct mlxsw_sp_prefix_usage prefix_usage_none = {{ 0 } }; 356 357 return mlxsw_sp_prefix_usage_eq(prefix_usage, &prefix_usage_none); 358 } 359 360 static void 361 mlxsw_sp_prefix_usage_cpy(struct mlxsw_sp_prefix_usage *prefix_usage1, 362 struct mlxsw_sp_prefix_usage *prefix_usage2) 363 { 364 memcpy(prefix_usage1, prefix_usage2, sizeof(*prefix_usage1)); 365 } 366 367 static void 368 mlxsw_sp_prefix_usage_set(struct mlxsw_sp_prefix_usage *prefix_usage, 369 unsigned char prefix_len) 370 { 371 set_bit(prefix_len, prefix_usage->b); 372 } 373 374 static void 375 mlxsw_sp_prefix_usage_clear(struct mlxsw_sp_prefix_usage *prefix_usage, 376 unsigned char prefix_len) 377 { 378 clear_bit(prefix_len, prefix_usage->b); 379 } 380 381 struct mlxsw_sp_fib_key { 382 unsigned char addr[sizeof(struct in6_addr)]; 383 unsigned char prefix_len; 384 }; 385 386 enum mlxsw_sp_fib_entry_type { 387 MLXSW_SP_FIB_ENTRY_TYPE_REMOTE, 388 MLXSW_SP_FIB_ENTRY_TYPE_LOCAL, 389 MLXSW_SP_FIB_ENTRY_TYPE_TRAP, 390 391 /* This is a special case of local delivery, where a packet should be 392 * decapsulated on reception. Note that there is no corresponding ENCAP, 393 * because that's a type of next hop, not of FIB entry. (There can be 394 * several next hops in a REMOTE entry, and some of them may be 395 * encapsulating entries.) 396 */ 397 MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP, 398 }; 399 400 struct mlxsw_sp_nexthop_group; 401 struct mlxsw_sp_fib; 402 403 struct mlxsw_sp_fib_node { 404 struct list_head entry_list; 405 struct list_head list; 406 struct rhash_head ht_node; 407 struct mlxsw_sp_fib *fib; 408 struct mlxsw_sp_fib_key key; 409 }; 410 411 struct mlxsw_sp_fib_entry_decap { 412 struct mlxsw_sp_ipip_entry *ipip_entry; 413 u32 tunnel_index; 414 }; 415 416 struct mlxsw_sp_fib_entry { 417 struct list_head list; 418 struct mlxsw_sp_fib_node *fib_node; 419 enum mlxsw_sp_fib_entry_type type; 420 struct list_head nexthop_group_node; 421 struct mlxsw_sp_nexthop_group *nh_group; 422 struct mlxsw_sp_fib_entry_decap decap; /* Valid for decap entries. */ 423 }; 424 425 struct mlxsw_sp_fib4_entry { 426 struct mlxsw_sp_fib_entry common; 427 u32 tb_id; 428 u32 prio; 429 u8 tos; 430 u8 type; 431 }; 432 433 struct mlxsw_sp_fib6_entry { 434 struct mlxsw_sp_fib_entry common; 435 struct list_head rt6_list; 436 unsigned int nrt6; 437 }; 438 439 struct mlxsw_sp_rt6 { 440 struct list_head list; 441 struct rt6_info *rt; 442 }; 443 444 struct mlxsw_sp_lpm_tree { 445 u8 id; /* tree ID */ 446 unsigned int ref_count; 447 enum mlxsw_sp_l3proto proto; 448 struct mlxsw_sp_prefix_usage prefix_usage; 449 }; 450 451 struct mlxsw_sp_fib { 452 struct rhashtable ht; 453 struct list_head node_list; 454 struct mlxsw_sp_vr *vr; 455 struct mlxsw_sp_lpm_tree *lpm_tree; 456 unsigned long prefix_ref_count[MLXSW_SP_PREFIX_COUNT]; 457 struct mlxsw_sp_prefix_usage prefix_usage; 458 enum mlxsw_sp_l3proto proto; 459 }; 460 461 struct mlxsw_sp_vr { 462 u16 id; /* virtual router ID */ 463 u32 tb_id; /* kernel fib table id */ 464 unsigned int rif_count; 465 struct mlxsw_sp_fib *fib4; 466 struct mlxsw_sp_fib *fib6; 467 struct mlxsw_sp_mr_table *mr4_table; 468 }; 469 470 static const struct rhashtable_params mlxsw_sp_fib_ht_params; 471 472 static struct mlxsw_sp_fib *mlxsw_sp_fib_create(struct mlxsw_sp_vr *vr, 473 enum mlxsw_sp_l3proto proto) 474 { 475 struct mlxsw_sp_fib *fib; 476 int err; 477 478 fib = kzalloc(sizeof(*fib), GFP_KERNEL); 479 if (!fib) 480 return ERR_PTR(-ENOMEM); 481 err = rhashtable_init(&fib->ht, &mlxsw_sp_fib_ht_params); 482 if (err) 483 goto err_rhashtable_init; 484 INIT_LIST_HEAD(&fib->node_list); 485 fib->proto = proto; 486 fib->vr = vr; 487 return fib; 488 489 err_rhashtable_init: 490 kfree(fib); 491 return ERR_PTR(err); 492 } 493 494 static void mlxsw_sp_fib_destroy(struct mlxsw_sp_fib *fib) 495 { 496 WARN_ON(!list_empty(&fib->node_list)); 497 WARN_ON(fib->lpm_tree); 498 rhashtable_destroy(&fib->ht); 499 kfree(fib); 500 } 501 502 static struct mlxsw_sp_lpm_tree * 503 mlxsw_sp_lpm_tree_find_unused(struct mlxsw_sp *mlxsw_sp) 504 { 505 static struct mlxsw_sp_lpm_tree *lpm_tree; 506 int i; 507 508 for (i = 0; i < mlxsw_sp->router->lpm.tree_count; i++) { 509 lpm_tree = &mlxsw_sp->router->lpm.trees[i]; 510 if (lpm_tree->ref_count == 0) 511 return lpm_tree; 512 } 513 return NULL; 514 } 515 516 static int mlxsw_sp_lpm_tree_alloc(struct mlxsw_sp *mlxsw_sp, 517 struct mlxsw_sp_lpm_tree *lpm_tree) 518 { 519 char ralta_pl[MLXSW_REG_RALTA_LEN]; 520 521 mlxsw_reg_ralta_pack(ralta_pl, true, 522 (enum mlxsw_reg_ralxx_protocol) lpm_tree->proto, 523 lpm_tree->id); 524 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralta), ralta_pl); 525 } 526 527 static void mlxsw_sp_lpm_tree_free(struct mlxsw_sp *mlxsw_sp, 528 struct mlxsw_sp_lpm_tree *lpm_tree) 529 { 530 char ralta_pl[MLXSW_REG_RALTA_LEN]; 531 532 mlxsw_reg_ralta_pack(ralta_pl, false, 533 (enum mlxsw_reg_ralxx_protocol) lpm_tree->proto, 534 lpm_tree->id); 535 mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralta), ralta_pl); 536 } 537 538 static int 539 mlxsw_sp_lpm_tree_left_struct_set(struct mlxsw_sp *mlxsw_sp, 540 struct mlxsw_sp_prefix_usage *prefix_usage, 541 struct mlxsw_sp_lpm_tree *lpm_tree) 542 { 543 char ralst_pl[MLXSW_REG_RALST_LEN]; 544 u8 root_bin = 0; 545 u8 prefix; 546 u8 last_prefix = MLXSW_REG_RALST_BIN_NO_CHILD; 547 548 mlxsw_sp_prefix_usage_for_each(prefix, prefix_usage) 549 root_bin = prefix; 550 551 mlxsw_reg_ralst_pack(ralst_pl, root_bin, lpm_tree->id); 552 mlxsw_sp_prefix_usage_for_each(prefix, prefix_usage) { 553 if (prefix == 0) 554 continue; 555 mlxsw_reg_ralst_bin_pack(ralst_pl, prefix, last_prefix, 556 MLXSW_REG_RALST_BIN_NO_CHILD); 557 last_prefix = prefix; 558 } 559 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralst), ralst_pl); 560 } 561 562 static struct mlxsw_sp_lpm_tree * 563 mlxsw_sp_lpm_tree_create(struct mlxsw_sp *mlxsw_sp, 564 struct mlxsw_sp_prefix_usage *prefix_usage, 565 enum mlxsw_sp_l3proto proto) 566 { 567 struct mlxsw_sp_lpm_tree *lpm_tree; 568 int err; 569 570 lpm_tree = mlxsw_sp_lpm_tree_find_unused(mlxsw_sp); 571 if (!lpm_tree) 572 return ERR_PTR(-EBUSY); 573 lpm_tree->proto = proto; 574 err = mlxsw_sp_lpm_tree_alloc(mlxsw_sp, lpm_tree); 575 if (err) 576 return ERR_PTR(err); 577 578 err = mlxsw_sp_lpm_tree_left_struct_set(mlxsw_sp, prefix_usage, 579 lpm_tree); 580 if (err) 581 goto err_left_struct_set; 582 memcpy(&lpm_tree->prefix_usage, prefix_usage, 583 sizeof(lpm_tree->prefix_usage)); 584 return lpm_tree; 585 586 err_left_struct_set: 587 mlxsw_sp_lpm_tree_free(mlxsw_sp, lpm_tree); 588 return ERR_PTR(err); 589 } 590 591 static void mlxsw_sp_lpm_tree_destroy(struct mlxsw_sp *mlxsw_sp, 592 struct mlxsw_sp_lpm_tree *lpm_tree) 593 { 594 mlxsw_sp_lpm_tree_free(mlxsw_sp, lpm_tree); 595 } 596 597 static struct mlxsw_sp_lpm_tree * 598 mlxsw_sp_lpm_tree_get(struct mlxsw_sp *mlxsw_sp, 599 struct mlxsw_sp_prefix_usage *prefix_usage, 600 enum mlxsw_sp_l3proto proto) 601 { 602 struct mlxsw_sp_lpm_tree *lpm_tree; 603 int i; 604 605 for (i = 0; i < mlxsw_sp->router->lpm.tree_count; i++) { 606 lpm_tree = &mlxsw_sp->router->lpm.trees[i]; 607 if (lpm_tree->ref_count != 0 && 608 lpm_tree->proto == proto && 609 mlxsw_sp_prefix_usage_eq(&lpm_tree->prefix_usage, 610 prefix_usage)) 611 return lpm_tree; 612 } 613 return mlxsw_sp_lpm_tree_create(mlxsw_sp, prefix_usage, proto); 614 } 615 616 static void mlxsw_sp_lpm_tree_hold(struct mlxsw_sp_lpm_tree *lpm_tree) 617 { 618 lpm_tree->ref_count++; 619 } 620 621 static void mlxsw_sp_lpm_tree_put(struct mlxsw_sp *mlxsw_sp, 622 struct mlxsw_sp_lpm_tree *lpm_tree) 623 { 624 if (--lpm_tree->ref_count == 0) 625 mlxsw_sp_lpm_tree_destroy(mlxsw_sp, lpm_tree); 626 } 627 628 #define MLXSW_SP_LPM_TREE_MIN 1 /* tree 0 is reserved */ 629 630 static int mlxsw_sp_lpm_init(struct mlxsw_sp *mlxsw_sp) 631 { 632 struct mlxsw_sp_lpm_tree *lpm_tree; 633 u64 max_trees; 634 int i; 635 636 if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, MAX_LPM_TREES)) 637 return -EIO; 638 639 max_trees = MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_LPM_TREES); 640 mlxsw_sp->router->lpm.tree_count = max_trees - MLXSW_SP_LPM_TREE_MIN; 641 mlxsw_sp->router->lpm.trees = kcalloc(mlxsw_sp->router->lpm.tree_count, 642 sizeof(struct mlxsw_sp_lpm_tree), 643 GFP_KERNEL); 644 if (!mlxsw_sp->router->lpm.trees) 645 return -ENOMEM; 646 647 for (i = 0; i < mlxsw_sp->router->lpm.tree_count; i++) { 648 lpm_tree = &mlxsw_sp->router->lpm.trees[i]; 649 lpm_tree->id = i + MLXSW_SP_LPM_TREE_MIN; 650 } 651 652 return 0; 653 } 654 655 static void mlxsw_sp_lpm_fini(struct mlxsw_sp *mlxsw_sp) 656 { 657 kfree(mlxsw_sp->router->lpm.trees); 658 } 659 660 static bool mlxsw_sp_vr_is_used(const struct mlxsw_sp_vr *vr) 661 { 662 return !!vr->fib4 || !!vr->fib6 || !!vr->mr4_table; 663 } 664 665 static struct mlxsw_sp_vr *mlxsw_sp_vr_find_unused(struct mlxsw_sp *mlxsw_sp) 666 { 667 struct mlxsw_sp_vr *vr; 668 int i; 669 670 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); i++) { 671 vr = &mlxsw_sp->router->vrs[i]; 672 if (!mlxsw_sp_vr_is_used(vr)) 673 return vr; 674 } 675 return NULL; 676 } 677 678 static int mlxsw_sp_vr_lpm_tree_bind(struct mlxsw_sp *mlxsw_sp, 679 const struct mlxsw_sp_fib *fib, u8 tree_id) 680 { 681 char raltb_pl[MLXSW_REG_RALTB_LEN]; 682 683 mlxsw_reg_raltb_pack(raltb_pl, fib->vr->id, 684 (enum mlxsw_reg_ralxx_protocol) fib->proto, 685 tree_id); 686 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(raltb), raltb_pl); 687 } 688 689 static int mlxsw_sp_vr_lpm_tree_unbind(struct mlxsw_sp *mlxsw_sp, 690 const struct mlxsw_sp_fib *fib) 691 { 692 char raltb_pl[MLXSW_REG_RALTB_LEN]; 693 694 /* Bind to tree 0 which is default */ 695 mlxsw_reg_raltb_pack(raltb_pl, fib->vr->id, 696 (enum mlxsw_reg_ralxx_protocol) fib->proto, 0); 697 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(raltb), raltb_pl); 698 } 699 700 static u32 mlxsw_sp_fix_tb_id(u32 tb_id) 701 { 702 /* For our purpose, squash main, default and local tables into one */ 703 if (tb_id == RT_TABLE_LOCAL || tb_id == RT_TABLE_DEFAULT) 704 tb_id = RT_TABLE_MAIN; 705 return tb_id; 706 } 707 708 static struct mlxsw_sp_vr *mlxsw_sp_vr_find(struct mlxsw_sp *mlxsw_sp, 709 u32 tb_id) 710 { 711 struct mlxsw_sp_vr *vr; 712 int i; 713 714 tb_id = mlxsw_sp_fix_tb_id(tb_id); 715 716 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); i++) { 717 vr = &mlxsw_sp->router->vrs[i]; 718 if (mlxsw_sp_vr_is_used(vr) && vr->tb_id == tb_id) 719 return vr; 720 } 721 return NULL; 722 } 723 724 static struct mlxsw_sp_fib *mlxsw_sp_vr_fib(const struct mlxsw_sp_vr *vr, 725 enum mlxsw_sp_l3proto proto) 726 { 727 switch (proto) { 728 case MLXSW_SP_L3_PROTO_IPV4: 729 return vr->fib4; 730 case MLXSW_SP_L3_PROTO_IPV6: 731 return vr->fib6; 732 } 733 return NULL; 734 } 735 736 static struct mlxsw_sp_vr *mlxsw_sp_vr_create(struct mlxsw_sp *mlxsw_sp, 737 u32 tb_id, 738 struct netlink_ext_ack *extack) 739 { 740 struct mlxsw_sp_vr *vr; 741 int err; 742 743 vr = mlxsw_sp_vr_find_unused(mlxsw_sp); 744 if (!vr) { 745 NL_SET_ERR_MSG(extack, "spectrum: Exceeded number of supported virtual routers"); 746 return ERR_PTR(-EBUSY); 747 } 748 vr->fib4 = mlxsw_sp_fib_create(vr, MLXSW_SP_L3_PROTO_IPV4); 749 if (IS_ERR(vr->fib4)) 750 return ERR_CAST(vr->fib4); 751 vr->fib6 = mlxsw_sp_fib_create(vr, MLXSW_SP_L3_PROTO_IPV6); 752 if (IS_ERR(vr->fib6)) { 753 err = PTR_ERR(vr->fib6); 754 goto err_fib6_create; 755 } 756 vr->mr4_table = mlxsw_sp_mr_table_create(mlxsw_sp, vr->id, 757 MLXSW_SP_L3_PROTO_IPV4); 758 if (IS_ERR(vr->mr4_table)) { 759 err = PTR_ERR(vr->mr4_table); 760 goto err_mr_table_create; 761 } 762 vr->tb_id = tb_id; 763 return vr; 764 765 err_mr_table_create: 766 mlxsw_sp_fib_destroy(vr->fib6); 767 vr->fib6 = NULL; 768 err_fib6_create: 769 mlxsw_sp_fib_destroy(vr->fib4); 770 vr->fib4 = NULL; 771 return ERR_PTR(err); 772 } 773 774 static void mlxsw_sp_vr_destroy(struct mlxsw_sp_vr *vr) 775 { 776 mlxsw_sp_mr_table_destroy(vr->mr4_table); 777 vr->mr4_table = NULL; 778 mlxsw_sp_fib_destroy(vr->fib6); 779 vr->fib6 = NULL; 780 mlxsw_sp_fib_destroy(vr->fib4); 781 vr->fib4 = NULL; 782 } 783 784 static struct mlxsw_sp_vr *mlxsw_sp_vr_get(struct mlxsw_sp *mlxsw_sp, u32 tb_id, 785 struct netlink_ext_ack *extack) 786 { 787 struct mlxsw_sp_vr *vr; 788 789 tb_id = mlxsw_sp_fix_tb_id(tb_id); 790 vr = mlxsw_sp_vr_find(mlxsw_sp, tb_id); 791 if (!vr) 792 vr = mlxsw_sp_vr_create(mlxsw_sp, tb_id, extack); 793 return vr; 794 } 795 796 static void mlxsw_sp_vr_put(struct mlxsw_sp_vr *vr) 797 { 798 if (!vr->rif_count && list_empty(&vr->fib4->node_list) && 799 list_empty(&vr->fib6->node_list) && 800 mlxsw_sp_mr_table_empty(vr->mr4_table)) 801 mlxsw_sp_vr_destroy(vr); 802 } 803 804 static bool 805 mlxsw_sp_vr_lpm_tree_should_replace(struct mlxsw_sp_vr *vr, 806 enum mlxsw_sp_l3proto proto, u8 tree_id) 807 { 808 struct mlxsw_sp_fib *fib = mlxsw_sp_vr_fib(vr, proto); 809 810 if (!mlxsw_sp_vr_is_used(vr)) 811 return false; 812 if (fib->lpm_tree && fib->lpm_tree->id == tree_id) 813 return true; 814 return false; 815 } 816 817 static int mlxsw_sp_vr_lpm_tree_replace(struct mlxsw_sp *mlxsw_sp, 818 struct mlxsw_sp_fib *fib, 819 struct mlxsw_sp_lpm_tree *new_tree) 820 { 821 struct mlxsw_sp_lpm_tree *old_tree = fib->lpm_tree; 822 int err; 823 824 err = mlxsw_sp_vr_lpm_tree_bind(mlxsw_sp, fib, new_tree->id); 825 if (err) 826 return err; 827 fib->lpm_tree = new_tree; 828 mlxsw_sp_lpm_tree_hold(new_tree); 829 mlxsw_sp_lpm_tree_put(mlxsw_sp, old_tree); 830 return 0; 831 } 832 833 static int mlxsw_sp_vrs_lpm_tree_replace(struct mlxsw_sp *mlxsw_sp, 834 struct mlxsw_sp_fib *fib, 835 struct mlxsw_sp_lpm_tree *new_tree) 836 { 837 struct mlxsw_sp_lpm_tree *old_tree = fib->lpm_tree; 838 enum mlxsw_sp_l3proto proto = fib->proto; 839 u8 old_id, new_id = new_tree->id; 840 struct mlxsw_sp_vr *vr; 841 int i, err; 842 843 if (!old_tree) 844 goto no_replace; 845 old_id = old_tree->id; 846 847 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); i++) { 848 vr = &mlxsw_sp->router->vrs[i]; 849 if (!mlxsw_sp_vr_lpm_tree_should_replace(vr, proto, old_id)) 850 continue; 851 err = mlxsw_sp_vr_lpm_tree_replace(mlxsw_sp, 852 mlxsw_sp_vr_fib(vr, proto), 853 new_tree); 854 if (err) 855 goto err_tree_replace; 856 } 857 858 return 0; 859 860 err_tree_replace: 861 for (i--; i >= 0; i--) { 862 if (!mlxsw_sp_vr_lpm_tree_should_replace(vr, proto, new_id)) 863 continue; 864 mlxsw_sp_vr_lpm_tree_replace(mlxsw_sp, 865 mlxsw_sp_vr_fib(vr, proto), 866 old_tree); 867 } 868 return err; 869 870 no_replace: 871 err = mlxsw_sp_vr_lpm_tree_bind(mlxsw_sp, fib, new_tree->id); 872 if (err) 873 return err; 874 fib->lpm_tree = new_tree; 875 mlxsw_sp_lpm_tree_hold(new_tree); 876 return 0; 877 } 878 879 static void 880 mlxsw_sp_vrs_prefixes(struct mlxsw_sp *mlxsw_sp, 881 enum mlxsw_sp_l3proto proto, 882 struct mlxsw_sp_prefix_usage *req_prefix_usage) 883 { 884 int i; 885 886 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); i++) { 887 struct mlxsw_sp_vr *vr = &mlxsw_sp->router->vrs[i]; 888 struct mlxsw_sp_fib *fib = mlxsw_sp_vr_fib(vr, proto); 889 unsigned char prefix; 890 891 if (!mlxsw_sp_vr_is_used(vr)) 892 continue; 893 mlxsw_sp_prefix_usage_for_each(prefix, &fib->prefix_usage) 894 mlxsw_sp_prefix_usage_set(req_prefix_usage, prefix); 895 } 896 } 897 898 static int mlxsw_sp_vrs_init(struct mlxsw_sp *mlxsw_sp) 899 { 900 struct mlxsw_sp_vr *vr; 901 u64 max_vrs; 902 int i; 903 904 if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, MAX_VRS)) 905 return -EIO; 906 907 max_vrs = MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); 908 mlxsw_sp->router->vrs = kcalloc(max_vrs, sizeof(struct mlxsw_sp_vr), 909 GFP_KERNEL); 910 if (!mlxsw_sp->router->vrs) 911 return -ENOMEM; 912 913 for (i = 0; i < max_vrs; i++) { 914 vr = &mlxsw_sp->router->vrs[i]; 915 vr->id = i; 916 } 917 918 return 0; 919 } 920 921 static void mlxsw_sp_router_fib_flush(struct mlxsw_sp *mlxsw_sp); 922 923 static void mlxsw_sp_vrs_fini(struct mlxsw_sp *mlxsw_sp) 924 { 925 /* At this stage we're guaranteed not to have new incoming 926 * FIB notifications and the work queue is free from FIBs 927 * sitting on top of mlxsw netdevs. However, we can still 928 * have other FIBs queued. Flush the queue before flushing 929 * the device's tables. No need for locks, as we're the only 930 * writer. 931 */ 932 mlxsw_core_flush_owq(); 933 mlxsw_sp_router_fib_flush(mlxsw_sp); 934 kfree(mlxsw_sp->router->vrs); 935 } 936 937 static struct net_device * 938 __mlxsw_sp_ipip_netdev_ul_dev_get(const struct net_device *ol_dev) 939 { 940 struct ip_tunnel *tun = netdev_priv(ol_dev); 941 struct net *net = dev_net(ol_dev); 942 943 return __dev_get_by_index(net, tun->parms.link); 944 } 945 946 u32 mlxsw_sp_ipip_dev_ul_tb_id(const struct net_device *ol_dev) 947 { 948 struct net_device *d = __mlxsw_sp_ipip_netdev_ul_dev_get(ol_dev); 949 950 if (d) 951 return l3mdev_fib_table(d) ? : RT_TABLE_MAIN; 952 else 953 return l3mdev_fib_table(ol_dev) ? : RT_TABLE_MAIN; 954 } 955 956 static struct mlxsw_sp_rif * 957 mlxsw_sp_rif_create(struct mlxsw_sp *mlxsw_sp, 958 const struct mlxsw_sp_rif_params *params, 959 struct netlink_ext_ack *extack); 960 961 static struct mlxsw_sp_rif_ipip_lb * 962 mlxsw_sp_ipip_ol_ipip_lb_create(struct mlxsw_sp *mlxsw_sp, 963 enum mlxsw_sp_ipip_type ipipt, 964 struct net_device *ol_dev, 965 struct netlink_ext_ack *extack) 966 { 967 struct mlxsw_sp_rif_params_ipip_lb lb_params; 968 const struct mlxsw_sp_ipip_ops *ipip_ops; 969 struct mlxsw_sp_rif *rif; 970 971 ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipipt]; 972 lb_params = (struct mlxsw_sp_rif_params_ipip_lb) { 973 .common.dev = ol_dev, 974 .common.lag = false, 975 .lb_config = ipip_ops->ol_loopback_config(mlxsw_sp, ol_dev), 976 }; 977 978 rif = mlxsw_sp_rif_create(mlxsw_sp, &lb_params.common, extack); 979 if (IS_ERR(rif)) 980 return ERR_CAST(rif); 981 return container_of(rif, struct mlxsw_sp_rif_ipip_lb, common); 982 } 983 984 static struct mlxsw_sp_ipip_entry * 985 mlxsw_sp_ipip_entry_alloc(struct mlxsw_sp *mlxsw_sp, 986 enum mlxsw_sp_ipip_type ipipt, 987 struct net_device *ol_dev) 988 { 989 struct mlxsw_sp_ipip_entry *ipip_entry; 990 struct mlxsw_sp_ipip_entry *ret = NULL; 991 992 ipip_entry = kzalloc(sizeof(*ipip_entry), GFP_KERNEL); 993 if (!ipip_entry) 994 return ERR_PTR(-ENOMEM); 995 996 ipip_entry->ol_lb = mlxsw_sp_ipip_ol_ipip_lb_create(mlxsw_sp, ipipt, 997 ol_dev, NULL); 998 if (IS_ERR(ipip_entry->ol_lb)) { 999 ret = ERR_CAST(ipip_entry->ol_lb); 1000 goto err_ol_ipip_lb_create; 1001 } 1002 1003 ipip_entry->ipipt = ipipt; 1004 ipip_entry->ol_dev = ol_dev; 1005 ipip_entry->parms = mlxsw_sp_ipip_netdev_parms(ol_dev); 1006 1007 return ipip_entry; 1008 1009 err_ol_ipip_lb_create: 1010 kfree(ipip_entry); 1011 return ret; 1012 } 1013 1014 static void 1015 mlxsw_sp_ipip_entry_dealloc(struct mlxsw_sp_ipip_entry *ipip_entry) 1016 { 1017 mlxsw_sp_rif_destroy(&ipip_entry->ol_lb->common); 1018 kfree(ipip_entry); 1019 } 1020 1021 static bool 1022 mlxsw_sp_ipip_entry_saddr_matches(struct mlxsw_sp *mlxsw_sp, 1023 const enum mlxsw_sp_l3proto ul_proto, 1024 union mlxsw_sp_l3addr saddr, 1025 u32 ul_tb_id, 1026 struct mlxsw_sp_ipip_entry *ipip_entry) 1027 { 1028 u32 tun_ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(ipip_entry->ol_dev); 1029 enum mlxsw_sp_ipip_type ipipt = ipip_entry->ipipt; 1030 union mlxsw_sp_l3addr tun_saddr; 1031 1032 if (mlxsw_sp->router->ipip_ops_arr[ipipt]->ul_proto != ul_proto) 1033 return false; 1034 1035 tun_saddr = mlxsw_sp_ipip_netdev_saddr(ul_proto, ipip_entry->ol_dev); 1036 return tun_ul_tb_id == ul_tb_id && 1037 mlxsw_sp_l3addr_eq(&tun_saddr, &saddr); 1038 } 1039 1040 static int 1041 mlxsw_sp_fib_entry_decap_init(struct mlxsw_sp *mlxsw_sp, 1042 struct mlxsw_sp_fib_entry *fib_entry, 1043 struct mlxsw_sp_ipip_entry *ipip_entry) 1044 { 1045 u32 tunnel_index; 1046 int err; 1047 1048 err = mlxsw_sp_kvdl_alloc(mlxsw_sp, 1, &tunnel_index); 1049 if (err) 1050 return err; 1051 1052 ipip_entry->decap_fib_entry = fib_entry; 1053 fib_entry->decap.ipip_entry = ipip_entry; 1054 fib_entry->decap.tunnel_index = tunnel_index; 1055 return 0; 1056 } 1057 1058 static void mlxsw_sp_fib_entry_decap_fini(struct mlxsw_sp *mlxsw_sp, 1059 struct mlxsw_sp_fib_entry *fib_entry) 1060 { 1061 /* Unlink this node from the IPIP entry that it's the decap entry of. */ 1062 fib_entry->decap.ipip_entry->decap_fib_entry = NULL; 1063 fib_entry->decap.ipip_entry = NULL; 1064 mlxsw_sp_kvdl_free(mlxsw_sp, fib_entry->decap.tunnel_index); 1065 } 1066 1067 static struct mlxsw_sp_fib_node * 1068 mlxsw_sp_fib_node_lookup(struct mlxsw_sp_fib *fib, const void *addr, 1069 size_t addr_len, unsigned char prefix_len); 1070 static int mlxsw_sp_fib_entry_update(struct mlxsw_sp *mlxsw_sp, 1071 struct mlxsw_sp_fib_entry *fib_entry); 1072 1073 static void 1074 mlxsw_sp_ipip_entry_demote_decap(struct mlxsw_sp *mlxsw_sp, 1075 struct mlxsw_sp_ipip_entry *ipip_entry) 1076 { 1077 struct mlxsw_sp_fib_entry *fib_entry = ipip_entry->decap_fib_entry; 1078 1079 mlxsw_sp_fib_entry_decap_fini(mlxsw_sp, fib_entry); 1080 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP; 1081 1082 mlxsw_sp_fib_entry_update(mlxsw_sp, fib_entry); 1083 } 1084 1085 static void 1086 mlxsw_sp_ipip_entry_promote_decap(struct mlxsw_sp *mlxsw_sp, 1087 struct mlxsw_sp_ipip_entry *ipip_entry, 1088 struct mlxsw_sp_fib_entry *decap_fib_entry) 1089 { 1090 if (mlxsw_sp_fib_entry_decap_init(mlxsw_sp, decap_fib_entry, 1091 ipip_entry)) 1092 return; 1093 decap_fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP; 1094 1095 if (mlxsw_sp_fib_entry_update(mlxsw_sp, decap_fib_entry)) 1096 mlxsw_sp_ipip_entry_demote_decap(mlxsw_sp, ipip_entry); 1097 } 1098 1099 /* Given an IPIP entry, find the corresponding decap route. */ 1100 static struct mlxsw_sp_fib_entry * 1101 mlxsw_sp_ipip_entry_find_decap(struct mlxsw_sp *mlxsw_sp, 1102 struct mlxsw_sp_ipip_entry *ipip_entry) 1103 { 1104 static struct mlxsw_sp_fib_node *fib_node; 1105 const struct mlxsw_sp_ipip_ops *ipip_ops; 1106 struct mlxsw_sp_fib_entry *fib_entry; 1107 unsigned char saddr_prefix_len; 1108 union mlxsw_sp_l3addr saddr; 1109 struct mlxsw_sp_fib *ul_fib; 1110 struct mlxsw_sp_vr *ul_vr; 1111 const void *saddrp; 1112 size_t saddr_len; 1113 u32 ul_tb_id; 1114 u32 saddr4; 1115 1116 ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt]; 1117 1118 ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(ipip_entry->ol_dev); 1119 ul_vr = mlxsw_sp_vr_find(mlxsw_sp, ul_tb_id); 1120 if (!ul_vr) 1121 return NULL; 1122 1123 ul_fib = mlxsw_sp_vr_fib(ul_vr, ipip_ops->ul_proto); 1124 saddr = mlxsw_sp_ipip_netdev_saddr(ipip_ops->ul_proto, 1125 ipip_entry->ol_dev); 1126 1127 switch (ipip_ops->ul_proto) { 1128 case MLXSW_SP_L3_PROTO_IPV4: 1129 saddr4 = be32_to_cpu(saddr.addr4); 1130 saddrp = &saddr4; 1131 saddr_len = 4; 1132 saddr_prefix_len = 32; 1133 break; 1134 case MLXSW_SP_L3_PROTO_IPV6: 1135 WARN_ON(1); 1136 return NULL; 1137 } 1138 1139 fib_node = mlxsw_sp_fib_node_lookup(ul_fib, saddrp, saddr_len, 1140 saddr_prefix_len); 1141 if (!fib_node || list_empty(&fib_node->entry_list)) 1142 return NULL; 1143 1144 fib_entry = list_first_entry(&fib_node->entry_list, 1145 struct mlxsw_sp_fib_entry, list); 1146 if (fib_entry->type != MLXSW_SP_FIB_ENTRY_TYPE_TRAP) 1147 return NULL; 1148 1149 return fib_entry; 1150 } 1151 1152 static struct mlxsw_sp_ipip_entry * 1153 mlxsw_sp_ipip_entry_create(struct mlxsw_sp *mlxsw_sp, 1154 enum mlxsw_sp_ipip_type ipipt, 1155 struct net_device *ol_dev) 1156 { 1157 struct mlxsw_sp_ipip_entry *ipip_entry; 1158 1159 ipip_entry = mlxsw_sp_ipip_entry_alloc(mlxsw_sp, ipipt, ol_dev); 1160 if (IS_ERR(ipip_entry)) 1161 return ipip_entry; 1162 1163 list_add_tail(&ipip_entry->ipip_list_node, 1164 &mlxsw_sp->router->ipip_list); 1165 1166 return ipip_entry; 1167 } 1168 1169 static void 1170 mlxsw_sp_ipip_entry_destroy(struct mlxsw_sp *mlxsw_sp, 1171 struct mlxsw_sp_ipip_entry *ipip_entry) 1172 { 1173 list_del(&ipip_entry->ipip_list_node); 1174 mlxsw_sp_ipip_entry_dealloc(ipip_entry); 1175 } 1176 1177 static bool 1178 mlxsw_sp_ipip_entry_matches_decap(struct mlxsw_sp *mlxsw_sp, 1179 const struct net_device *ul_dev, 1180 enum mlxsw_sp_l3proto ul_proto, 1181 union mlxsw_sp_l3addr ul_dip, 1182 struct mlxsw_sp_ipip_entry *ipip_entry) 1183 { 1184 u32 ul_tb_id = l3mdev_fib_table(ul_dev) ? : RT_TABLE_MAIN; 1185 enum mlxsw_sp_ipip_type ipipt = ipip_entry->ipipt; 1186 struct net_device *ipip_ul_dev; 1187 1188 if (mlxsw_sp->router->ipip_ops_arr[ipipt]->ul_proto != ul_proto) 1189 return false; 1190 1191 ipip_ul_dev = __mlxsw_sp_ipip_netdev_ul_dev_get(ipip_entry->ol_dev); 1192 return mlxsw_sp_ipip_entry_saddr_matches(mlxsw_sp, ul_proto, ul_dip, 1193 ul_tb_id, ipip_entry) && 1194 (!ipip_ul_dev || ipip_ul_dev == ul_dev); 1195 } 1196 1197 /* Given decap parameters, find the corresponding IPIP entry. */ 1198 static struct mlxsw_sp_ipip_entry * 1199 mlxsw_sp_ipip_entry_find_by_decap(struct mlxsw_sp *mlxsw_sp, 1200 const struct net_device *ul_dev, 1201 enum mlxsw_sp_l3proto ul_proto, 1202 union mlxsw_sp_l3addr ul_dip) 1203 { 1204 struct mlxsw_sp_ipip_entry *ipip_entry; 1205 1206 list_for_each_entry(ipip_entry, &mlxsw_sp->router->ipip_list, 1207 ipip_list_node) 1208 if (mlxsw_sp_ipip_entry_matches_decap(mlxsw_sp, ul_dev, 1209 ul_proto, ul_dip, 1210 ipip_entry)) 1211 return ipip_entry; 1212 1213 return NULL; 1214 } 1215 1216 static bool mlxsw_sp_netdev_ipip_type(const struct mlxsw_sp *mlxsw_sp, 1217 const struct net_device *dev, 1218 enum mlxsw_sp_ipip_type *p_type) 1219 { 1220 struct mlxsw_sp_router *router = mlxsw_sp->router; 1221 const struct mlxsw_sp_ipip_ops *ipip_ops; 1222 enum mlxsw_sp_ipip_type ipipt; 1223 1224 for (ipipt = 0; ipipt < MLXSW_SP_IPIP_TYPE_MAX; ++ipipt) { 1225 ipip_ops = router->ipip_ops_arr[ipipt]; 1226 if (dev->type == ipip_ops->dev_type) { 1227 if (p_type) 1228 *p_type = ipipt; 1229 return true; 1230 } 1231 } 1232 return false; 1233 } 1234 1235 bool mlxsw_sp_netdev_is_ipip_ol(const struct mlxsw_sp *mlxsw_sp, 1236 const struct net_device *dev) 1237 { 1238 return mlxsw_sp_netdev_ipip_type(mlxsw_sp, dev, NULL); 1239 } 1240 1241 static struct mlxsw_sp_ipip_entry * 1242 mlxsw_sp_ipip_entry_find_by_ol_dev(struct mlxsw_sp *mlxsw_sp, 1243 const struct net_device *ol_dev) 1244 { 1245 struct mlxsw_sp_ipip_entry *ipip_entry; 1246 1247 list_for_each_entry(ipip_entry, &mlxsw_sp->router->ipip_list, 1248 ipip_list_node) 1249 if (ipip_entry->ol_dev == ol_dev) 1250 return ipip_entry; 1251 1252 return NULL; 1253 } 1254 1255 static struct mlxsw_sp_ipip_entry * 1256 mlxsw_sp_ipip_entry_find_by_ul_dev(const struct mlxsw_sp *mlxsw_sp, 1257 const struct net_device *ul_dev, 1258 struct mlxsw_sp_ipip_entry *start) 1259 { 1260 struct mlxsw_sp_ipip_entry *ipip_entry; 1261 1262 ipip_entry = list_prepare_entry(start, &mlxsw_sp->router->ipip_list, 1263 ipip_list_node); 1264 list_for_each_entry_continue(ipip_entry, &mlxsw_sp->router->ipip_list, 1265 ipip_list_node) { 1266 struct net_device *ipip_ul_dev = 1267 __mlxsw_sp_ipip_netdev_ul_dev_get(ipip_entry->ol_dev); 1268 1269 if (ipip_ul_dev == ul_dev) 1270 return ipip_entry; 1271 } 1272 1273 return NULL; 1274 } 1275 1276 bool mlxsw_sp_netdev_is_ipip_ul(const struct mlxsw_sp *mlxsw_sp, 1277 const struct net_device *dev) 1278 { 1279 return mlxsw_sp_ipip_entry_find_by_ul_dev(mlxsw_sp, dev, NULL); 1280 } 1281 1282 static bool mlxsw_sp_netdevice_ipip_can_offload(struct mlxsw_sp *mlxsw_sp, 1283 const struct net_device *ol_dev, 1284 enum mlxsw_sp_ipip_type ipipt) 1285 { 1286 const struct mlxsw_sp_ipip_ops *ops 1287 = mlxsw_sp->router->ipip_ops_arr[ipipt]; 1288 1289 /* For deciding whether decap should be offloaded, we don't care about 1290 * overlay protocol, so ask whether either one is supported. 1291 */ 1292 return ops->can_offload(mlxsw_sp, ol_dev, MLXSW_SP_L3_PROTO_IPV4) || 1293 ops->can_offload(mlxsw_sp, ol_dev, MLXSW_SP_L3_PROTO_IPV6); 1294 } 1295 1296 static int mlxsw_sp_netdevice_ipip_ol_reg_event(struct mlxsw_sp *mlxsw_sp, 1297 struct net_device *ol_dev) 1298 { 1299 struct mlxsw_sp_ipip_entry *ipip_entry; 1300 enum mlxsw_sp_l3proto ul_proto; 1301 enum mlxsw_sp_ipip_type ipipt; 1302 union mlxsw_sp_l3addr saddr; 1303 u32 ul_tb_id; 1304 1305 mlxsw_sp_netdev_ipip_type(mlxsw_sp, ol_dev, &ipipt); 1306 if (mlxsw_sp_netdevice_ipip_can_offload(mlxsw_sp, ol_dev, ipipt)) { 1307 ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(ol_dev); 1308 ul_proto = mlxsw_sp->router->ipip_ops_arr[ipipt]->ul_proto; 1309 saddr = mlxsw_sp_ipip_netdev_saddr(ul_proto, ol_dev); 1310 if (!mlxsw_sp_ipip_demote_tunnel_by_saddr(mlxsw_sp, ul_proto, 1311 saddr, ul_tb_id, 1312 NULL)) { 1313 ipip_entry = mlxsw_sp_ipip_entry_create(mlxsw_sp, ipipt, 1314 ol_dev); 1315 if (IS_ERR(ipip_entry)) 1316 return PTR_ERR(ipip_entry); 1317 } 1318 } 1319 1320 return 0; 1321 } 1322 1323 static void mlxsw_sp_netdevice_ipip_ol_unreg_event(struct mlxsw_sp *mlxsw_sp, 1324 struct net_device *ol_dev) 1325 { 1326 struct mlxsw_sp_ipip_entry *ipip_entry; 1327 1328 ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev); 1329 if (ipip_entry) 1330 mlxsw_sp_ipip_entry_destroy(mlxsw_sp, ipip_entry); 1331 } 1332 1333 static void 1334 mlxsw_sp_ipip_entry_ol_up_event(struct mlxsw_sp *mlxsw_sp, 1335 struct mlxsw_sp_ipip_entry *ipip_entry) 1336 { 1337 struct mlxsw_sp_fib_entry *decap_fib_entry; 1338 1339 decap_fib_entry = mlxsw_sp_ipip_entry_find_decap(mlxsw_sp, ipip_entry); 1340 if (decap_fib_entry) 1341 mlxsw_sp_ipip_entry_promote_decap(mlxsw_sp, ipip_entry, 1342 decap_fib_entry); 1343 } 1344 1345 static void mlxsw_sp_netdevice_ipip_ol_up_event(struct mlxsw_sp *mlxsw_sp, 1346 struct net_device *ol_dev) 1347 { 1348 struct mlxsw_sp_ipip_entry *ipip_entry; 1349 1350 ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev); 1351 if (ipip_entry) 1352 mlxsw_sp_ipip_entry_ol_up_event(mlxsw_sp, ipip_entry); 1353 } 1354 1355 static void 1356 mlxsw_sp_ipip_entry_ol_down_event(struct mlxsw_sp *mlxsw_sp, 1357 struct mlxsw_sp_ipip_entry *ipip_entry) 1358 { 1359 if (ipip_entry->decap_fib_entry) 1360 mlxsw_sp_ipip_entry_demote_decap(mlxsw_sp, ipip_entry); 1361 } 1362 1363 static void mlxsw_sp_netdevice_ipip_ol_down_event(struct mlxsw_sp *mlxsw_sp, 1364 struct net_device *ol_dev) 1365 { 1366 struct mlxsw_sp_ipip_entry *ipip_entry; 1367 1368 ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev); 1369 if (ipip_entry) 1370 mlxsw_sp_ipip_entry_ol_down_event(mlxsw_sp, ipip_entry); 1371 } 1372 1373 static void mlxsw_sp_nexthop_rif_migrate(struct mlxsw_sp *mlxsw_sp, 1374 struct mlxsw_sp_rif *old_rif, 1375 struct mlxsw_sp_rif *new_rif); 1376 static int 1377 mlxsw_sp_ipip_entry_ol_lb_update(struct mlxsw_sp *mlxsw_sp, 1378 struct mlxsw_sp_ipip_entry *ipip_entry, 1379 bool keep_encap, 1380 struct netlink_ext_ack *extack) 1381 { 1382 struct mlxsw_sp_rif_ipip_lb *old_lb_rif = ipip_entry->ol_lb; 1383 struct mlxsw_sp_rif_ipip_lb *new_lb_rif; 1384 1385 new_lb_rif = mlxsw_sp_ipip_ol_ipip_lb_create(mlxsw_sp, 1386 ipip_entry->ipipt, 1387 ipip_entry->ol_dev, 1388 extack); 1389 if (IS_ERR(new_lb_rif)) 1390 return PTR_ERR(new_lb_rif); 1391 ipip_entry->ol_lb = new_lb_rif; 1392 1393 if (keep_encap) 1394 mlxsw_sp_nexthop_rif_migrate(mlxsw_sp, &old_lb_rif->common, 1395 &new_lb_rif->common); 1396 1397 mlxsw_sp_rif_destroy(&old_lb_rif->common); 1398 1399 return 0; 1400 } 1401 1402 static void mlxsw_sp_nexthop_rif_update(struct mlxsw_sp *mlxsw_sp, 1403 struct mlxsw_sp_rif *rif); 1404 1405 /** 1406 * Update the offload related to an IPIP entry. This always updates decap, and 1407 * in addition to that it also: 1408 * @recreate_loopback: recreates the associated loopback RIF 1409 * @keep_encap: updates next hops that use the tunnel netdevice. This is only 1410 * relevant when recreate_loopback is true. 1411 * @update_nexthops: updates next hops, keeping the current loopback RIF. This 1412 * is only relevant when recreate_loopback is false. 1413 */ 1414 int __mlxsw_sp_ipip_entry_update_tunnel(struct mlxsw_sp *mlxsw_sp, 1415 struct mlxsw_sp_ipip_entry *ipip_entry, 1416 bool recreate_loopback, 1417 bool keep_encap, 1418 bool update_nexthops, 1419 struct netlink_ext_ack *extack) 1420 { 1421 int err; 1422 1423 /* RIFs can't be edited, so to update loopback, we need to destroy and 1424 * recreate it. That creates a window of opportunity where RALUE and 1425 * RATR registers end up referencing a RIF that's already gone. RATRs 1426 * are handled in mlxsw_sp_ipip_entry_ol_lb_update(), and to take care 1427 * of RALUE, demote the decap route back. 1428 */ 1429 if (ipip_entry->decap_fib_entry) 1430 mlxsw_sp_ipip_entry_demote_decap(mlxsw_sp, ipip_entry); 1431 1432 if (recreate_loopback) { 1433 err = mlxsw_sp_ipip_entry_ol_lb_update(mlxsw_sp, ipip_entry, 1434 keep_encap, extack); 1435 if (err) 1436 return err; 1437 } else if (update_nexthops) { 1438 mlxsw_sp_nexthop_rif_update(mlxsw_sp, 1439 &ipip_entry->ol_lb->common); 1440 } 1441 1442 if (ipip_entry->ol_dev->flags & IFF_UP) 1443 mlxsw_sp_ipip_entry_ol_up_event(mlxsw_sp, ipip_entry); 1444 1445 return 0; 1446 } 1447 1448 static int mlxsw_sp_netdevice_ipip_ol_vrf_event(struct mlxsw_sp *mlxsw_sp, 1449 struct net_device *ol_dev, 1450 struct netlink_ext_ack *extack) 1451 { 1452 struct mlxsw_sp_ipip_entry *ipip_entry = 1453 mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev); 1454 enum mlxsw_sp_l3proto ul_proto; 1455 union mlxsw_sp_l3addr saddr; 1456 u32 ul_tb_id; 1457 1458 if (!ipip_entry) 1459 return 0; 1460 1461 /* For flat configuration cases, moving overlay to a different VRF might 1462 * cause local address conflict, and the conflicting tunnels need to be 1463 * demoted. 1464 */ 1465 ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(ol_dev); 1466 ul_proto = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt]->ul_proto; 1467 saddr = mlxsw_sp_ipip_netdev_saddr(ul_proto, ol_dev); 1468 if (mlxsw_sp_ipip_demote_tunnel_by_saddr(mlxsw_sp, ul_proto, 1469 saddr, ul_tb_id, 1470 ipip_entry)) { 1471 mlxsw_sp_ipip_entry_demote_tunnel(mlxsw_sp, ipip_entry); 1472 return 0; 1473 } 1474 1475 return __mlxsw_sp_ipip_entry_update_tunnel(mlxsw_sp, ipip_entry, 1476 true, false, false, extack); 1477 } 1478 1479 static int 1480 mlxsw_sp_netdevice_ipip_ul_vrf_event(struct mlxsw_sp *mlxsw_sp, 1481 struct mlxsw_sp_ipip_entry *ipip_entry, 1482 struct net_device *ul_dev, 1483 struct netlink_ext_ack *extack) 1484 { 1485 return __mlxsw_sp_ipip_entry_update_tunnel(mlxsw_sp, ipip_entry, 1486 true, true, false, extack); 1487 } 1488 1489 static int 1490 mlxsw_sp_netdevice_ipip_ul_up_event(struct mlxsw_sp *mlxsw_sp, 1491 struct mlxsw_sp_ipip_entry *ipip_entry, 1492 struct net_device *ul_dev) 1493 { 1494 return __mlxsw_sp_ipip_entry_update_tunnel(mlxsw_sp, ipip_entry, 1495 false, false, true, NULL); 1496 } 1497 1498 static int 1499 mlxsw_sp_netdevice_ipip_ul_down_event(struct mlxsw_sp *mlxsw_sp, 1500 struct mlxsw_sp_ipip_entry *ipip_entry, 1501 struct net_device *ul_dev) 1502 { 1503 /* A down underlay device causes encapsulated packets to not be 1504 * forwarded, but decap still works. So refresh next hops without 1505 * touching anything else. 1506 */ 1507 return __mlxsw_sp_ipip_entry_update_tunnel(mlxsw_sp, ipip_entry, 1508 false, false, true, NULL); 1509 } 1510 1511 static int 1512 mlxsw_sp_netdevice_ipip_ol_change_event(struct mlxsw_sp *mlxsw_sp, 1513 struct net_device *ol_dev, 1514 struct netlink_ext_ack *extack) 1515 { 1516 const struct mlxsw_sp_ipip_ops *ipip_ops; 1517 struct mlxsw_sp_ipip_entry *ipip_entry; 1518 int err; 1519 1520 ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, ol_dev); 1521 if (!ipip_entry) 1522 /* A change might make a tunnel eligible for offloading, but 1523 * that is currently not implemented. What falls to slow path 1524 * stays there. 1525 */ 1526 return 0; 1527 1528 /* A change might make a tunnel not eligible for offloading. */ 1529 if (!mlxsw_sp_netdevice_ipip_can_offload(mlxsw_sp, ol_dev, 1530 ipip_entry->ipipt)) { 1531 mlxsw_sp_ipip_entry_demote_tunnel(mlxsw_sp, ipip_entry); 1532 return 0; 1533 } 1534 1535 ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt]; 1536 err = ipip_ops->ol_netdev_change(mlxsw_sp, ipip_entry, extack); 1537 return err; 1538 } 1539 1540 void mlxsw_sp_ipip_entry_demote_tunnel(struct mlxsw_sp *mlxsw_sp, 1541 struct mlxsw_sp_ipip_entry *ipip_entry) 1542 { 1543 struct net_device *ol_dev = ipip_entry->ol_dev; 1544 1545 if (ol_dev->flags & IFF_UP) 1546 mlxsw_sp_ipip_entry_ol_down_event(mlxsw_sp, ipip_entry); 1547 mlxsw_sp_ipip_entry_destroy(mlxsw_sp, ipip_entry); 1548 } 1549 1550 /* The configuration where several tunnels have the same local address in the 1551 * same underlay table needs special treatment in the HW. That is currently not 1552 * implemented in the driver. This function finds and demotes the first tunnel 1553 * with a given source address, except the one passed in in the argument 1554 * `except'. 1555 */ 1556 bool 1557 mlxsw_sp_ipip_demote_tunnel_by_saddr(struct mlxsw_sp *mlxsw_sp, 1558 enum mlxsw_sp_l3proto ul_proto, 1559 union mlxsw_sp_l3addr saddr, 1560 u32 ul_tb_id, 1561 const struct mlxsw_sp_ipip_entry *except) 1562 { 1563 struct mlxsw_sp_ipip_entry *ipip_entry, *tmp; 1564 1565 list_for_each_entry_safe(ipip_entry, tmp, &mlxsw_sp->router->ipip_list, 1566 ipip_list_node) { 1567 if (ipip_entry != except && 1568 mlxsw_sp_ipip_entry_saddr_matches(mlxsw_sp, ul_proto, saddr, 1569 ul_tb_id, ipip_entry)) { 1570 mlxsw_sp_ipip_entry_demote_tunnel(mlxsw_sp, ipip_entry); 1571 return true; 1572 } 1573 } 1574 1575 return false; 1576 } 1577 1578 static void mlxsw_sp_ipip_demote_tunnel_by_ul_netdev(struct mlxsw_sp *mlxsw_sp, 1579 struct net_device *ul_dev) 1580 { 1581 struct mlxsw_sp_ipip_entry *ipip_entry, *tmp; 1582 1583 list_for_each_entry_safe(ipip_entry, tmp, &mlxsw_sp->router->ipip_list, 1584 ipip_list_node) { 1585 struct net_device *ipip_ul_dev = 1586 __mlxsw_sp_ipip_netdev_ul_dev_get(ipip_entry->ol_dev); 1587 1588 if (ipip_ul_dev == ul_dev) 1589 mlxsw_sp_ipip_entry_demote_tunnel(mlxsw_sp, ipip_entry); 1590 } 1591 } 1592 1593 int mlxsw_sp_netdevice_ipip_ol_event(struct mlxsw_sp *mlxsw_sp, 1594 struct net_device *ol_dev, 1595 unsigned long event, 1596 struct netdev_notifier_info *info) 1597 { 1598 struct netdev_notifier_changeupper_info *chup; 1599 struct netlink_ext_ack *extack; 1600 1601 switch (event) { 1602 case NETDEV_REGISTER: 1603 return mlxsw_sp_netdevice_ipip_ol_reg_event(mlxsw_sp, ol_dev); 1604 case NETDEV_UNREGISTER: 1605 mlxsw_sp_netdevice_ipip_ol_unreg_event(mlxsw_sp, ol_dev); 1606 return 0; 1607 case NETDEV_UP: 1608 mlxsw_sp_netdevice_ipip_ol_up_event(mlxsw_sp, ol_dev); 1609 return 0; 1610 case NETDEV_DOWN: 1611 mlxsw_sp_netdevice_ipip_ol_down_event(mlxsw_sp, ol_dev); 1612 return 0; 1613 case NETDEV_CHANGEUPPER: 1614 chup = container_of(info, typeof(*chup), info); 1615 extack = info->extack; 1616 if (netif_is_l3_master(chup->upper_dev)) 1617 return mlxsw_sp_netdevice_ipip_ol_vrf_event(mlxsw_sp, 1618 ol_dev, 1619 extack); 1620 return 0; 1621 case NETDEV_CHANGE: 1622 extack = info->extack; 1623 return mlxsw_sp_netdevice_ipip_ol_change_event(mlxsw_sp, 1624 ol_dev, extack); 1625 } 1626 return 0; 1627 } 1628 1629 static int 1630 __mlxsw_sp_netdevice_ipip_ul_event(struct mlxsw_sp *mlxsw_sp, 1631 struct mlxsw_sp_ipip_entry *ipip_entry, 1632 struct net_device *ul_dev, 1633 unsigned long event, 1634 struct netdev_notifier_info *info) 1635 { 1636 struct netdev_notifier_changeupper_info *chup; 1637 struct netlink_ext_ack *extack; 1638 1639 switch (event) { 1640 case NETDEV_CHANGEUPPER: 1641 chup = container_of(info, typeof(*chup), info); 1642 extack = info->extack; 1643 if (netif_is_l3_master(chup->upper_dev)) 1644 return mlxsw_sp_netdevice_ipip_ul_vrf_event(mlxsw_sp, 1645 ipip_entry, 1646 ul_dev, 1647 extack); 1648 break; 1649 1650 case NETDEV_UP: 1651 return mlxsw_sp_netdevice_ipip_ul_up_event(mlxsw_sp, ipip_entry, 1652 ul_dev); 1653 case NETDEV_DOWN: 1654 return mlxsw_sp_netdevice_ipip_ul_down_event(mlxsw_sp, 1655 ipip_entry, 1656 ul_dev); 1657 } 1658 return 0; 1659 } 1660 1661 int 1662 mlxsw_sp_netdevice_ipip_ul_event(struct mlxsw_sp *mlxsw_sp, 1663 struct net_device *ul_dev, 1664 unsigned long event, 1665 struct netdev_notifier_info *info) 1666 { 1667 struct mlxsw_sp_ipip_entry *ipip_entry = NULL; 1668 int err; 1669 1670 while ((ipip_entry = mlxsw_sp_ipip_entry_find_by_ul_dev(mlxsw_sp, 1671 ul_dev, 1672 ipip_entry))) { 1673 err = __mlxsw_sp_netdevice_ipip_ul_event(mlxsw_sp, ipip_entry, 1674 ul_dev, event, info); 1675 if (err) { 1676 mlxsw_sp_ipip_demote_tunnel_by_ul_netdev(mlxsw_sp, 1677 ul_dev); 1678 return err; 1679 } 1680 } 1681 1682 return 0; 1683 } 1684 1685 struct mlxsw_sp_neigh_key { 1686 struct neighbour *n; 1687 }; 1688 1689 struct mlxsw_sp_neigh_entry { 1690 struct list_head rif_list_node; 1691 struct rhash_head ht_node; 1692 struct mlxsw_sp_neigh_key key; 1693 u16 rif; 1694 bool connected; 1695 unsigned char ha[ETH_ALEN]; 1696 struct list_head nexthop_list; /* list of nexthops using 1697 * this neigh entry 1698 */ 1699 struct list_head nexthop_neighs_list_node; 1700 unsigned int counter_index; 1701 bool counter_valid; 1702 }; 1703 1704 static const struct rhashtable_params mlxsw_sp_neigh_ht_params = { 1705 .key_offset = offsetof(struct mlxsw_sp_neigh_entry, key), 1706 .head_offset = offsetof(struct mlxsw_sp_neigh_entry, ht_node), 1707 .key_len = sizeof(struct mlxsw_sp_neigh_key), 1708 }; 1709 1710 struct mlxsw_sp_neigh_entry * 1711 mlxsw_sp_rif_neigh_next(struct mlxsw_sp_rif *rif, 1712 struct mlxsw_sp_neigh_entry *neigh_entry) 1713 { 1714 if (!neigh_entry) { 1715 if (list_empty(&rif->neigh_list)) 1716 return NULL; 1717 else 1718 return list_first_entry(&rif->neigh_list, 1719 typeof(*neigh_entry), 1720 rif_list_node); 1721 } 1722 if (list_is_last(&neigh_entry->rif_list_node, &rif->neigh_list)) 1723 return NULL; 1724 return list_next_entry(neigh_entry, rif_list_node); 1725 } 1726 1727 int mlxsw_sp_neigh_entry_type(struct mlxsw_sp_neigh_entry *neigh_entry) 1728 { 1729 return neigh_entry->key.n->tbl->family; 1730 } 1731 1732 unsigned char * 1733 mlxsw_sp_neigh_entry_ha(struct mlxsw_sp_neigh_entry *neigh_entry) 1734 { 1735 return neigh_entry->ha; 1736 } 1737 1738 u32 mlxsw_sp_neigh4_entry_dip(struct mlxsw_sp_neigh_entry *neigh_entry) 1739 { 1740 struct neighbour *n; 1741 1742 n = neigh_entry->key.n; 1743 return ntohl(*((__be32 *) n->primary_key)); 1744 } 1745 1746 struct in6_addr * 1747 mlxsw_sp_neigh6_entry_dip(struct mlxsw_sp_neigh_entry *neigh_entry) 1748 { 1749 struct neighbour *n; 1750 1751 n = neigh_entry->key.n; 1752 return (struct in6_addr *) &n->primary_key; 1753 } 1754 1755 int mlxsw_sp_neigh_counter_get(struct mlxsw_sp *mlxsw_sp, 1756 struct mlxsw_sp_neigh_entry *neigh_entry, 1757 u64 *p_counter) 1758 { 1759 if (!neigh_entry->counter_valid) 1760 return -EINVAL; 1761 1762 return mlxsw_sp_flow_counter_get(mlxsw_sp, neigh_entry->counter_index, 1763 p_counter, NULL); 1764 } 1765 1766 static struct mlxsw_sp_neigh_entry * 1767 mlxsw_sp_neigh_entry_alloc(struct mlxsw_sp *mlxsw_sp, struct neighbour *n, 1768 u16 rif) 1769 { 1770 struct mlxsw_sp_neigh_entry *neigh_entry; 1771 1772 neigh_entry = kzalloc(sizeof(*neigh_entry), GFP_KERNEL); 1773 if (!neigh_entry) 1774 return NULL; 1775 1776 neigh_entry->key.n = n; 1777 neigh_entry->rif = rif; 1778 INIT_LIST_HEAD(&neigh_entry->nexthop_list); 1779 1780 return neigh_entry; 1781 } 1782 1783 static void mlxsw_sp_neigh_entry_free(struct mlxsw_sp_neigh_entry *neigh_entry) 1784 { 1785 kfree(neigh_entry); 1786 } 1787 1788 static int 1789 mlxsw_sp_neigh_entry_insert(struct mlxsw_sp *mlxsw_sp, 1790 struct mlxsw_sp_neigh_entry *neigh_entry) 1791 { 1792 return rhashtable_insert_fast(&mlxsw_sp->router->neigh_ht, 1793 &neigh_entry->ht_node, 1794 mlxsw_sp_neigh_ht_params); 1795 } 1796 1797 static void 1798 mlxsw_sp_neigh_entry_remove(struct mlxsw_sp *mlxsw_sp, 1799 struct mlxsw_sp_neigh_entry *neigh_entry) 1800 { 1801 rhashtable_remove_fast(&mlxsw_sp->router->neigh_ht, 1802 &neigh_entry->ht_node, 1803 mlxsw_sp_neigh_ht_params); 1804 } 1805 1806 static bool 1807 mlxsw_sp_neigh_counter_should_alloc(struct mlxsw_sp *mlxsw_sp, 1808 struct mlxsw_sp_neigh_entry *neigh_entry) 1809 { 1810 struct devlink *devlink; 1811 const char *table_name; 1812 1813 switch (mlxsw_sp_neigh_entry_type(neigh_entry)) { 1814 case AF_INET: 1815 table_name = MLXSW_SP_DPIPE_TABLE_NAME_HOST4; 1816 break; 1817 case AF_INET6: 1818 table_name = MLXSW_SP_DPIPE_TABLE_NAME_HOST6; 1819 break; 1820 default: 1821 WARN_ON(1); 1822 return false; 1823 } 1824 1825 devlink = priv_to_devlink(mlxsw_sp->core); 1826 return devlink_dpipe_table_counter_enabled(devlink, table_name); 1827 } 1828 1829 static void 1830 mlxsw_sp_neigh_counter_alloc(struct mlxsw_sp *mlxsw_sp, 1831 struct mlxsw_sp_neigh_entry *neigh_entry) 1832 { 1833 if (!mlxsw_sp_neigh_counter_should_alloc(mlxsw_sp, neigh_entry)) 1834 return; 1835 1836 if (mlxsw_sp_flow_counter_alloc(mlxsw_sp, &neigh_entry->counter_index)) 1837 return; 1838 1839 neigh_entry->counter_valid = true; 1840 } 1841 1842 static void 1843 mlxsw_sp_neigh_counter_free(struct mlxsw_sp *mlxsw_sp, 1844 struct mlxsw_sp_neigh_entry *neigh_entry) 1845 { 1846 if (!neigh_entry->counter_valid) 1847 return; 1848 mlxsw_sp_flow_counter_free(mlxsw_sp, 1849 neigh_entry->counter_index); 1850 neigh_entry->counter_valid = false; 1851 } 1852 1853 static struct mlxsw_sp_neigh_entry * 1854 mlxsw_sp_neigh_entry_create(struct mlxsw_sp *mlxsw_sp, struct neighbour *n) 1855 { 1856 struct mlxsw_sp_neigh_entry *neigh_entry; 1857 struct mlxsw_sp_rif *rif; 1858 int err; 1859 1860 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, n->dev); 1861 if (!rif) 1862 return ERR_PTR(-EINVAL); 1863 1864 neigh_entry = mlxsw_sp_neigh_entry_alloc(mlxsw_sp, n, rif->rif_index); 1865 if (!neigh_entry) 1866 return ERR_PTR(-ENOMEM); 1867 1868 err = mlxsw_sp_neigh_entry_insert(mlxsw_sp, neigh_entry); 1869 if (err) 1870 goto err_neigh_entry_insert; 1871 1872 mlxsw_sp_neigh_counter_alloc(mlxsw_sp, neigh_entry); 1873 list_add(&neigh_entry->rif_list_node, &rif->neigh_list); 1874 1875 return neigh_entry; 1876 1877 err_neigh_entry_insert: 1878 mlxsw_sp_neigh_entry_free(neigh_entry); 1879 return ERR_PTR(err); 1880 } 1881 1882 static void 1883 mlxsw_sp_neigh_entry_destroy(struct mlxsw_sp *mlxsw_sp, 1884 struct mlxsw_sp_neigh_entry *neigh_entry) 1885 { 1886 list_del(&neigh_entry->rif_list_node); 1887 mlxsw_sp_neigh_counter_free(mlxsw_sp, neigh_entry); 1888 mlxsw_sp_neigh_entry_remove(mlxsw_sp, neigh_entry); 1889 mlxsw_sp_neigh_entry_free(neigh_entry); 1890 } 1891 1892 static struct mlxsw_sp_neigh_entry * 1893 mlxsw_sp_neigh_entry_lookup(struct mlxsw_sp *mlxsw_sp, struct neighbour *n) 1894 { 1895 struct mlxsw_sp_neigh_key key; 1896 1897 key.n = n; 1898 return rhashtable_lookup_fast(&mlxsw_sp->router->neigh_ht, 1899 &key, mlxsw_sp_neigh_ht_params); 1900 } 1901 1902 static void 1903 mlxsw_sp_router_neighs_update_interval_init(struct mlxsw_sp *mlxsw_sp) 1904 { 1905 unsigned long interval; 1906 1907 #if IS_ENABLED(CONFIG_IPV6) 1908 interval = min_t(unsigned long, 1909 NEIGH_VAR(&arp_tbl.parms, DELAY_PROBE_TIME), 1910 NEIGH_VAR(&nd_tbl.parms, DELAY_PROBE_TIME)); 1911 #else 1912 interval = NEIGH_VAR(&arp_tbl.parms, DELAY_PROBE_TIME); 1913 #endif 1914 mlxsw_sp->router->neighs_update.interval = jiffies_to_msecs(interval); 1915 } 1916 1917 static void mlxsw_sp_router_neigh_ent_ipv4_process(struct mlxsw_sp *mlxsw_sp, 1918 char *rauhtd_pl, 1919 int ent_index) 1920 { 1921 struct net_device *dev; 1922 struct neighbour *n; 1923 __be32 dipn; 1924 u32 dip; 1925 u16 rif; 1926 1927 mlxsw_reg_rauhtd_ent_ipv4_unpack(rauhtd_pl, ent_index, &rif, &dip); 1928 1929 if (!mlxsw_sp->router->rifs[rif]) { 1930 dev_err_ratelimited(mlxsw_sp->bus_info->dev, "Incorrect RIF in neighbour entry\n"); 1931 return; 1932 } 1933 1934 dipn = htonl(dip); 1935 dev = mlxsw_sp->router->rifs[rif]->dev; 1936 n = neigh_lookup(&arp_tbl, &dipn, dev); 1937 if (!n) { 1938 netdev_err(dev, "Failed to find matching neighbour for IP=%pI4h\n", 1939 &dip); 1940 return; 1941 } 1942 1943 netdev_dbg(dev, "Updating neighbour with IP=%pI4h\n", &dip); 1944 neigh_event_send(n, NULL); 1945 neigh_release(n); 1946 } 1947 1948 #if IS_ENABLED(CONFIG_IPV6) 1949 static void mlxsw_sp_router_neigh_ent_ipv6_process(struct mlxsw_sp *mlxsw_sp, 1950 char *rauhtd_pl, 1951 int rec_index) 1952 { 1953 struct net_device *dev; 1954 struct neighbour *n; 1955 struct in6_addr dip; 1956 u16 rif; 1957 1958 mlxsw_reg_rauhtd_ent_ipv6_unpack(rauhtd_pl, rec_index, &rif, 1959 (char *) &dip); 1960 1961 if (!mlxsw_sp->router->rifs[rif]) { 1962 dev_err_ratelimited(mlxsw_sp->bus_info->dev, "Incorrect RIF in neighbour entry\n"); 1963 return; 1964 } 1965 1966 dev = mlxsw_sp->router->rifs[rif]->dev; 1967 n = neigh_lookup(&nd_tbl, &dip, dev); 1968 if (!n) { 1969 netdev_err(dev, "Failed to find matching neighbour for IP=%pI6c\n", 1970 &dip); 1971 return; 1972 } 1973 1974 netdev_dbg(dev, "Updating neighbour with IP=%pI6c\n", &dip); 1975 neigh_event_send(n, NULL); 1976 neigh_release(n); 1977 } 1978 #else 1979 static void mlxsw_sp_router_neigh_ent_ipv6_process(struct mlxsw_sp *mlxsw_sp, 1980 char *rauhtd_pl, 1981 int rec_index) 1982 { 1983 } 1984 #endif 1985 1986 static void mlxsw_sp_router_neigh_rec_ipv4_process(struct mlxsw_sp *mlxsw_sp, 1987 char *rauhtd_pl, 1988 int rec_index) 1989 { 1990 u8 num_entries; 1991 int i; 1992 1993 num_entries = mlxsw_reg_rauhtd_ipv4_rec_num_entries_get(rauhtd_pl, 1994 rec_index); 1995 /* Hardware starts counting at 0, so add 1. */ 1996 num_entries++; 1997 1998 /* Each record consists of several neighbour entries. */ 1999 for (i = 0; i < num_entries; i++) { 2000 int ent_index; 2001 2002 ent_index = rec_index * MLXSW_REG_RAUHTD_IPV4_ENT_PER_REC + i; 2003 mlxsw_sp_router_neigh_ent_ipv4_process(mlxsw_sp, rauhtd_pl, 2004 ent_index); 2005 } 2006 2007 } 2008 2009 static void mlxsw_sp_router_neigh_rec_ipv6_process(struct mlxsw_sp *mlxsw_sp, 2010 char *rauhtd_pl, 2011 int rec_index) 2012 { 2013 /* One record contains one entry. */ 2014 mlxsw_sp_router_neigh_ent_ipv6_process(mlxsw_sp, rauhtd_pl, 2015 rec_index); 2016 } 2017 2018 static void mlxsw_sp_router_neigh_rec_process(struct mlxsw_sp *mlxsw_sp, 2019 char *rauhtd_pl, int rec_index) 2020 { 2021 switch (mlxsw_reg_rauhtd_rec_type_get(rauhtd_pl, rec_index)) { 2022 case MLXSW_REG_RAUHTD_TYPE_IPV4: 2023 mlxsw_sp_router_neigh_rec_ipv4_process(mlxsw_sp, rauhtd_pl, 2024 rec_index); 2025 break; 2026 case MLXSW_REG_RAUHTD_TYPE_IPV6: 2027 mlxsw_sp_router_neigh_rec_ipv6_process(mlxsw_sp, rauhtd_pl, 2028 rec_index); 2029 break; 2030 } 2031 } 2032 2033 static bool mlxsw_sp_router_rauhtd_is_full(char *rauhtd_pl) 2034 { 2035 u8 num_rec, last_rec_index, num_entries; 2036 2037 num_rec = mlxsw_reg_rauhtd_num_rec_get(rauhtd_pl); 2038 last_rec_index = num_rec - 1; 2039 2040 if (num_rec < MLXSW_REG_RAUHTD_REC_MAX_NUM) 2041 return false; 2042 if (mlxsw_reg_rauhtd_rec_type_get(rauhtd_pl, last_rec_index) == 2043 MLXSW_REG_RAUHTD_TYPE_IPV6) 2044 return true; 2045 2046 num_entries = mlxsw_reg_rauhtd_ipv4_rec_num_entries_get(rauhtd_pl, 2047 last_rec_index); 2048 if (++num_entries == MLXSW_REG_RAUHTD_IPV4_ENT_PER_REC) 2049 return true; 2050 return false; 2051 } 2052 2053 static int 2054 __mlxsw_sp_router_neighs_update_rauhtd(struct mlxsw_sp *mlxsw_sp, 2055 char *rauhtd_pl, 2056 enum mlxsw_reg_rauhtd_type type) 2057 { 2058 int i, num_rec; 2059 int err; 2060 2061 /* Make sure the neighbour's netdev isn't removed in the 2062 * process. 2063 */ 2064 rtnl_lock(); 2065 do { 2066 mlxsw_reg_rauhtd_pack(rauhtd_pl, type); 2067 err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(rauhtd), 2068 rauhtd_pl); 2069 if (err) { 2070 dev_err_ratelimited(mlxsw_sp->bus_info->dev, "Failed to dump neighbour table\n"); 2071 break; 2072 } 2073 num_rec = mlxsw_reg_rauhtd_num_rec_get(rauhtd_pl); 2074 for (i = 0; i < num_rec; i++) 2075 mlxsw_sp_router_neigh_rec_process(mlxsw_sp, rauhtd_pl, 2076 i); 2077 } while (mlxsw_sp_router_rauhtd_is_full(rauhtd_pl)); 2078 rtnl_unlock(); 2079 2080 return err; 2081 } 2082 2083 static int mlxsw_sp_router_neighs_update_rauhtd(struct mlxsw_sp *mlxsw_sp) 2084 { 2085 enum mlxsw_reg_rauhtd_type type; 2086 char *rauhtd_pl; 2087 int err; 2088 2089 rauhtd_pl = kmalloc(MLXSW_REG_RAUHTD_LEN, GFP_KERNEL); 2090 if (!rauhtd_pl) 2091 return -ENOMEM; 2092 2093 type = MLXSW_REG_RAUHTD_TYPE_IPV4; 2094 err = __mlxsw_sp_router_neighs_update_rauhtd(mlxsw_sp, rauhtd_pl, type); 2095 if (err) 2096 goto out; 2097 2098 type = MLXSW_REG_RAUHTD_TYPE_IPV6; 2099 err = __mlxsw_sp_router_neighs_update_rauhtd(mlxsw_sp, rauhtd_pl, type); 2100 out: 2101 kfree(rauhtd_pl); 2102 return err; 2103 } 2104 2105 static void mlxsw_sp_router_neighs_update_nh(struct mlxsw_sp *mlxsw_sp) 2106 { 2107 struct mlxsw_sp_neigh_entry *neigh_entry; 2108 2109 /* Take RTNL mutex here to prevent lists from changes */ 2110 rtnl_lock(); 2111 list_for_each_entry(neigh_entry, &mlxsw_sp->router->nexthop_neighs_list, 2112 nexthop_neighs_list_node) 2113 /* If this neigh have nexthops, make the kernel think this neigh 2114 * is active regardless of the traffic. 2115 */ 2116 neigh_event_send(neigh_entry->key.n, NULL); 2117 rtnl_unlock(); 2118 } 2119 2120 static void 2121 mlxsw_sp_router_neighs_update_work_schedule(struct mlxsw_sp *mlxsw_sp) 2122 { 2123 unsigned long interval = mlxsw_sp->router->neighs_update.interval; 2124 2125 mlxsw_core_schedule_dw(&mlxsw_sp->router->neighs_update.dw, 2126 msecs_to_jiffies(interval)); 2127 } 2128 2129 static void mlxsw_sp_router_neighs_update_work(struct work_struct *work) 2130 { 2131 struct mlxsw_sp_router *router; 2132 int err; 2133 2134 router = container_of(work, struct mlxsw_sp_router, 2135 neighs_update.dw.work); 2136 err = mlxsw_sp_router_neighs_update_rauhtd(router->mlxsw_sp); 2137 if (err) 2138 dev_err(router->mlxsw_sp->bus_info->dev, "Could not update kernel for neigh activity"); 2139 2140 mlxsw_sp_router_neighs_update_nh(router->mlxsw_sp); 2141 2142 mlxsw_sp_router_neighs_update_work_schedule(router->mlxsw_sp); 2143 } 2144 2145 static void mlxsw_sp_router_probe_unresolved_nexthops(struct work_struct *work) 2146 { 2147 struct mlxsw_sp_neigh_entry *neigh_entry; 2148 struct mlxsw_sp_router *router; 2149 2150 router = container_of(work, struct mlxsw_sp_router, 2151 nexthop_probe_dw.work); 2152 /* Iterate over nexthop neighbours, find those who are unresolved and 2153 * send arp on them. This solves the chicken-egg problem when 2154 * the nexthop wouldn't get offloaded until the neighbor is resolved 2155 * but it wouldn't get resolved ever in case traffic is flowing in HW 2156 * using different nexthop. 2157 * 2158 * Take RTNL mutex here to prevent lists from changes. 2159 */ 2160 rtnl_lock(); 2161 list_for_each_entry(neigh_entry, &router->nexthop_neighs_list, 2162 nexthop_neighs_list_node) 2163 if (!neigh_entry->connected) 2164 neigh_event_send(neigh_entry->key.n, NULL); 2165 rtnl_unlock(); 2166 2167 mlxsw_core_schedule_dw(&router->nexthop_probe_dw, 2168 MLXSW_SP_UNRESOLVED_NH_PROBE_INTERVAL); 2169 } 2170 2171 static void 2172 mlxsw_sp_nexthop_neigh_update(struct mlxsw_sp *mlxsw_sp, 2173 struct mlxsw_sp_neigh_entry *neigh_entry, 2174 bool removing); 2175 2176 static enum mlxsw_reg_rauht_op mlxsw_sp_rauht_op(bool adding) 2177 { 2178 return adding ? MLXSW_REG_RAUHT_OP_WRITE_ADD : 2179 MLXSW_REG_RAUHT_OP_WRITE_DELETE; 2180 } 2181 2182 static void 2183 mlxsw_sp_router_neigh_entry_op4(struct mlxsw_sp *mlxsw_sp, 2184 struct mlxsw_sp_neigh_entry *neigh_entry, 2185 enum mlxsw_reg_rauht_op op) 2186 { 2187 struct neighbour *n = neigh_entry->key.n; 2188 u32 dip = ntohl(*((__be32 *) n->primary_key)); 2189 char rauht_pl[MLXSW_REG_RAUHT_LEN]; 2190 2191 mlxsw_reg_rauht_pack4(rauht_pl, op, neigh_entry->rif, neigh_entry->ha, 2192 dip); 2193 if (neigh_entry->counter_valid) 2194 mlxsw_reg_rauht_pack_counter(rauht_pl, 2195 neigh_entry->counter_index); 2196 mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rauht), rauht_pl); 2197 } 2198 2199 static void 2200 mlxsw_sp_router_neigh_entry_op6(struct mlxsw_sp *mlxsw_sp, 2201 struct mlxsw_sp_neigh_entry *neigh_entry, 2202 enum mlxsw_reg_rauht_op op) 2203 { 2204 struct neighbour *n = neigh_entry->key.n; 2205 char rauht_pl[MLXSW_REG_RAUHT_LEN]; 2206 const char *dip = n->primary_key; 2207 2208 mlxsw_reg_rauht_pack6(rauht_pl, op, neigh_entry->rif, neigh_entry->ha, 2209 dip); 2210 if (neigh_entry->counter_valid) 2211 mlxsw_reg_rauht_pack_counter(rauht_pl, 2212 neigh_entry->counter_index); 2213 mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rauht), rauht_pl); 2214 } 2215 2216 bool mlxsw_sp_neigh_ipv6_ignore(struct mlxsw_sp_neigh_entry *neigh_entry) 2217 { 2218 struct neighbour *n = neigh_entry->key.n; 2219 2220 /* Packets with a link-local destination address are trapped 2221 * after LPM lookup and never reach the neighbour table, so 2222 * there is no need to program such neighbours to the device. 2223 */ 2224 if (ipv6_addr_type((struct in6_addr *) &n->primary_key) & 2225 IPV6_ADDR_LINKLOCAL) 2226 return true; 2227 return false; 2228 } 2229 2230 static void 2231 mlxsw_sp_neigh_entry_update(struct mlxsw_sp *mlxsw_sp, 2232 struct mlxsw_sp_neigh_entry *neigh_entry, 2233 bool adding) 2234 { 2235 if (!adding && !neigh_entry->connected) 2236 return; 2237 neigh_entry->connected = adding; 2238 if (neigh_entry->key.n->tbl->family == AF_INET) { 2239 mlxsw_sp_router_neigh_entry_op4(mlxsw_sp, neigh_entry, 2240 mlxsw_sp_rauht_op(adding)); 2241 } else if (neigh_entry->key.n->tbl->family == AF_INET6) { 2242 if (mlxsw_sp_neigh_ipv6_ignore(neigh_entry)) 2243 return; 2244 mlxsw_sp_router_neigh_entry_op6(mlxsw_sp, neigh_entry, 2245 mlxsw_sp_rauht_op(adding)); 2246 } else { 2247 WARN_ON_ONCE(1); 2248 } 2249 } 2250 2251 void 2252 mlxsw_sp_neigh_entry_counter_update(struct mlxsw_sp *mlxsw_sp, 2253 struct mlxsw_sp_neigh_entry *neigh_entry, 2254 bool adding) 2255 { 2256 if (adding) 2257 mlxsw_sp_neigh_counter_alloc(mlxsw_sp, neigh_entry); 2258 else 2259 mlxsw_sp_neigh_counter_free(mlxsw_sp, neigh_entry); 2260 mlxsw_sp_neigh_entry_update(mlxsw_sp, neigh_entry, true); 2261 } 2262 2263 struct mlxsw_sp_netevent_work { 2264 struct work_struct work; 2265 struct mlxsw_sp *mlxsw_sp; 2266 struct neighbour *n; 2267 }; 2268 2269 static void mlxsw_sp_router_neigh_event_work(struct work_struct *work) 2270 { 2271 struct mlxsw_sp_netevent_work *net_work = 2272 container_of(work, struct mlxsw_sp_netevent_work, work); 2273 struct mlxsw_sp *mlxsw_sp = net_work->mlxsw_sp; 2274 struct mlxsw_sp_neigh_entry *neigh_entry; 2275 struct neighbour *n = net_work->n; 2276 unsigned char ha[ETH_ALEN]; 2277 bool entry_connected; 2278 u8 nud_state, dead; 2279 2280 /* If these parameters are changed after we release the lock, 2281 * then we are guaranteed to receive another event letting us 2282 * know about it. 2283 */ 2284 read_lock_bh(&n->lock); 2285 memcpy(ha, n->ha, ETH_ALEN); 2286 nud_state = n->nud_state; 2287 dead = n->dead; 2288 read_unlock_bh(&n->lock); 2289 2290 rtnl_lock(); 2291 entry_connected = nud_state & NUD_VALID && !dead; 2292 neigh_entry = mlxsw_sp_neigh_entry_lookup(mlxsw_sp, n); 2293 if (!entry_connected && !neigh_entry) 2294 goto out; 2295 if (!neigh_entry) { 2296 neigh_entry = mlxsw_sp_neigh_entry_create(mlxsw_sp, n); 2297 if (IS_ERR(neigh_entry)) 2298 goto out; 2299 } 2300 2301 memcpy(neigh_entry->ha, ha, ETH_ALEN); 2302 mlxsw_sp_neigh_entry_update(mlxsw_sp, neigh_entry, entry_connected); 2303 mlxsw_sp_nexthop_neigh_update(mlxsw_sp, neigh_entry, !entry_connected); 2304 2305 if (!neigh_entry->connected && list_empty(&neigh_entry->nexthop_list)) 2306 mlxsw_sp_neigh_entry_destroy(mlxsw_sp, neigh_entry); 2307 2308 out: 2309 rtnl_unlock(); 2310 neigh_release(n); 2311 kfree(net_work); 2312 } 2313 2314 static int mlxsw_sp_mp_hash_init(struct mlxsw_sp *mlxsw_sp); 2315 2316 static void mlxsw_sp_router_mp_hash_event_work(struct work_struct *work) 2317 { 2318 struct mlxsw_sp_netevent_work *net_work = 2319 container_of(work, struct mlxsw_sp_netevent_work, work); 2320 struct mlxsw_sp *mlxsw_sp = net_work->mlxsw_sp; 2321 2322 mlxsw_sp_mp_hash_init(mlxsw_sp); 2323 kfree(net_work); 2324 } 2325 2326 static int mlxsw_sp_router_netevent_event(struct notifier_block *nb, 2327 unsigned long event, void *ptr) 2328 { 2329 struct mlxsw_sp_netevent_work *net_work; 2330 struct mlxsw_sp_port *mlxsw_sp_port; 2331 struct mlxsw_sp_router *router; 2332 struct mlxsw_sp *mlxsw_sp; 2333 unsigned long interval; 2334 struct neigh_parms *p; 2335 struct neighbour *n; 2336 struct net *net; 2337 2338 switch (event) { 2339 case NETEVENT_DELAY_PROBE_TIME_UPDATE: 2340 p = ptr; 2341 2342 /* We don't care about changes in the default table. */ 2343 if (!p->dev || (p->tbl->family != AF_INET && 2344 p->tbl->family != AF_INET6)) 2345 return NOTIFY_DONE; 2346 2347 /* We are in atomic context and can't take RTNL mutex, 2348 * so use RCU variant to walk the device chain. 2349 */ 2350 mlxsw_sp_port = mlxsw_sp_port_lower_dev_hold(p->dev); 2351 if (!mlxsw_sp_port) 2352 return NOTIFY_DONE; 2353 2354 mlxsw_sp = mlxsw_sp_port->mlxsw_sp; 2355 interval = jiffies_to_msecs(NEIGH_VAR(p, DELAY_PROBE_TIME)); 2356 mlxsw_sp->router->neighs_update.interval = interval; 2357 2358 mlxsw_sp_port_dev_put(mlxsw_sp_port); 2359 break; 2360 case NETEVENT_NEIGH_UPDATE: 2361 n = ptr; 2362 2363 if (n->tbl->family != AF_INET && n->tbl->family != AF_INET6) 2364 return NOTIFY_DONE; 2365 2366 mlxsw_sp_port = mlxsw_sp_port_lower_dev_hold(n->dev); 2367 if (!mlxsw_sp_port) 2368 return NOTIFY_DONE; 2369 2370 net_work = kzalloc(sizeof(*net_work), GFP_ATOMIC); 2371 if (!net_work) { 2372 mlxsw_sp_port_dev_put(mlxsw_sp_port); 2373 return NOTIFY_BAD; 2374 } 2375 2376 INIT_WORK(&net_work->work, mlxsw_sp_router_neigh_event_work); 2377 net_work->mlxsw_sp = mlxsw_sp_port->mlxsw_sp; 2378 net_work->n = n; 2379 2380 /* Take a reference to ensure the neighbour won't be 2381 * destructed until we drop the reference in delayed 2382 * work. 2383 */ 2384 neigh_clone(n); 2385 mlxsw_core_schedule_work(&net_work->work); 2386 mlxsw_sp_port_dev_put(mlxsw_sp_port); 2387 break; 2388 case NETEVENT_MULTIPATH_HASH_UPDATE: 2389 net = ptr; 2390 2391 if (!net_eq(net, &init_net)) 2392 return NOTIFY_DONE; 2393 2394 net_work = kzalloc(sizeof(*net_work), GFP_ATOMIC); 2395 if (!net_work) 2396 return NOTIFY_BAD; 2397 2398 router = container_of(nb, struct mlxsw_sp_router, netevent_nb); 2399 INIT_WORK(&net_work->work, mlxsw_sp_router_mp_hash_event_work); 2400 net_work->mlxsw_sp = router->mlxsw_sp; 2401 mlxsw_core_schedule_work(&net_work->work); 2402 break; 2403 } 2404 2405 return NOTIFY_DONE; 2406 } 2407 2408 static int mlxsw_sp_neigh_init(struct mlxsw_sp *mlxsw_sp) 2409 { 2410 int err; 2411 2412 err = rhashtable_init(&mlxsw_sp->router->neigh_ht, 2413 &mlxsw_sp_neigh_ht_params); 2414 if (err) 2415 return err; 2416 2417 /* Initialize the polling interval according to the default 2418 * table. 2419 */ 2420 mlxsw_sp_router_neighs_update_interval_init(mlxsw_sp); 2421 2422 /* Create the delayed works for the activity_update */ 2423 INIT_DELAYED_WORK(&mlxsw_sp->router->neighs_update.dw, 2424 mlxsw_sp_router_neighs_update_work); 2425 INIT_DELAYED_WORK(&mlxsw_sp->router->nexthop_probe_dw, 2426 mlxsw_sp_router_probe_unresolved_nexthops); 2427 mlxsw_core_schedule_dw(&mlxsw_sp->router->neighs_update.dw, 0); 2428 mlxsw_core_schedule_dw(&mlxsw_sp->router->nexthop_probe_dw, 0); 2429 return 0; 2430 } 2431 2432 static void mlxsw_sp_neigh_fini(struct mlxsw_sp *mlxsw_sp) 2433 { 2434 cancel_delayed_work_sync(&mlxsw_sp->router->neighs_update.dw); 2435 cancel_delayed_work_sync(&mlxsw_sp->router->nexthop_probe_dw); 2436 rhashtable_destroy(&mlxsw_sp->router->neigh_ht); 2437 } 2438 2439 static void mlxsw_sp_neigh_rif_gone_sync(struct mlxsw_sp *mlxsw_sp, 2440 struct mlxsw_sp_rif *rif) 2441 { 2442 struct mlxsw_sp_neigh_entry *neigh_entry, *tmp; 2443 2444 list_for_each_entry_safe(neigh_entry, tmp, &rif->neigh_list, 2445 rif_list_node) { 2446 mlxsw_sp_neigh_entry_update(mlxsw_sp, neigh_entry, false); 2447 mlxsw_sp_neigh_entry_destroy(mlxsw_sp, neigh_entry); 2448 } 2449 } 2450 2451 enum mlxsw_sp_nexthop_type { 2452 MLXSW_SP_NEXTHOP_TYPE_ETH, 2453 MLXSW_SP_NEXTHOP_TYPE_IPIP, 2454 }; 2455 2456 struct mlxsw_sp_nexthop_key { 2457 struct fib_nh *fib_nh; 2458 }; 2459 2460 struct mlxsw_sp_nexthop { 2461 struct list_head neigh_list_node; /* member of neigh entry list */ 2462 struct list_head rif_list_node; 2463 struct list_head router_list_node; 2464 struct mlxsw_sp_nexthop_group *nh_grp; /* pointer back to the group 2465 * this belongs to 2466 */ 2467 struct rhash_head ht_node; 2468 struct mlxsw_sp_nexthop_key key; 2469 unsigned char gw_addr[sizeof(struct in6_addr)]; 2470 int ifindex; 2471 int nh_weight; 2472 int norm_nh_weight; 2473 int num_adj_entries; 2474 struct mlxsw_sp_rif *rif; 2475 u8 should_offload:1, /* set indicates this neigh is connected and 2476 * should be put to KVD linear area of this group. 2477 */ 2478 offloaded:1, /* set in case the neigh is actually put into 2479 * KVD linear area of this group. 2480 */ 2481 update:1; /* set indicates that MAC of this neigh should be 2482 * updated in HW 2483 */ 2484 enum mlxsw_sp_nexthop_type type; 2485 union { 2486 struct mlxsw_sp_neigh_entry *neigh_entry; 2487 struct mlxsw_sp_ipip_entry *ipip_entry; 2488 }; 2489 unsigned int counter_index; 2490 bool counter_valid; 2491 }; 2492 2493 struct mlxsw_sp_nexthop_group { 2494 void *priv; 2495 struct rhash_head ht_node; 2496 struct list_head fib_list; /* list of fib entries that use this group */ 2497 struct neigh_table *neigh_tbl; 2498 u8 adj_index_valid:1, 2499 gateway:1; /* routes using the group use a gateway */ 2500 u32 adj_index; 2501 u16 ecmp_size; 2502 u16 count; 2503 int sum_norm_weight; 2504 struct mlxsw_sp_nexthop nexthops[0]; 2505 #define nh_rif nexthops[0].rif 2506 }; 2507 2508 void mlxsw_sp_nexthop_counter_alloc(struct mlxsw_sp *mlxsw_sp, 2509 struct mlxsw_sp_nexthop *nh) 2510 { 2511 struct devlink *devlink; 2512 2513 devlink = priv_to_devlink(mlxsw_sp->core); 2514 if (!devlink_dpipe_table_counter_enabled(devlink, 2515 MLXSW_SP_DPIPE_TABLE_NAME_ADJ)) 2516 return; 2517 2518 if (mlxsw_sp_flow_counter_alloc(mlxsw_sp, &nh->counter_index)) 2519 return; 2520 2521 nh->counter_valid = true; 2522 } 2523 2524 void mlxsw_sp_nexthop_counter_free(struct mlxsw_sp *mlxsw_sp, 2525 struct mlxsw_sp_nexthop *nh) 2526 { 2527 if (!nh->counter_valid) 2528 return; 2529 mlxsw_sp_flow_counter_free(mlxsw_sp, nh->counter_index); 2530 nh->counter_valid = false; 2531 } 2532 2533 int mlxsw_sp_nexthop_counter_get(struct mlxsw_sp *mlxsw_sp, 2534 struct mlxsw_sp_nexthop *nh, u64 *p_counter) 2535 { 2536 if (!nh->counter_valid) 2537 return -EINVAL; 2538 2539 return mlxsw_sp_flow_counter_get(mlxsw_sp, nh->counter_index, 2540 p_counter, NULL); 2541 } 2542 2543 struct mlxsw_sp_nexthop *mlxsw_sp_nexthop_next(struct mlxsw_sp_router *router, 2544 struct mlxsw_sp_nexthop *nh) 2545 { 2546 if (!nh) { 2547 if (list_empty(&router->nexthop_list)) 2548 return NULL; 2549 else 2550 return list_first_entry(&router->nexthop_list, 2551 typeof(*nh), router_list_node); 2552 } 2553 if (list_is_last(&nh->router_list_node, &router->nexthop_list)) 2554 return NULL; 2555 return list_next_entry(nh, router_list_node); 2556 } 2557 2558 bool mlxsw_sp_nexthop_offload(struct mlxsw_sp_nexthop *nh) 2559 { 2560 return nh->offloaded; 2561 } 2562 2563 unsigned char *mlxsw_sp_nexthop_ha(struct mlxsw_sp_nexthop *nh) 2564 { 2565 if (!nh->offloaded) 2566 return NULL; 2567 return nh->neigh_entry->ha; 2568 } 2569 2570 int mlxsw_sp_nexthop_indexes(struct mlxsw_sp_nexthop *nh, u32 *p_adj_index, 2571 u32 *p_adj_size, u32 *p_adj_hash_index) 2572 { 2573 struct mlxsw_sp_nexthop_group *nh_grp = nh->nh_grp; 2574 u32 adj_hash_index = 0; 2575 int i; 2576 2577 if (!nh->offloaded || !nh_grp->adj_index_valid) 2578 return -EINVAL; 2579 2580 *p_adj_index = nh_grp->adj_index; 2581 *p_adj_size = nh_grp->ecmp_size; 2582 2583 for (i = 0; i < nh_grp->count; i++) { 2584 struct mlxsw_sp_nexthop *nh_iter = &nh_grp->nexthops[i]; 2585 2586 if (nh_iter == nh) 2587 break; 2588 if (nh_iter->offloaded) 2589 adj_hash_index += nh_iter->num_adj_entries; 2590 } 2591 2592 *p_adj_hash_index = adj_hash_index; 2593 return 0; 2594 } 2595 2596 struct mlxsw_sp_rif *mlxsw_sp_nexthop_rif(struct mlxsw_sp_nexthop *nh) 2597 { 2598 return nh->rif; 2599 } 2600 2601 bool mlxsw_sp_nexthop_group_has_ipip(struct mlxsw_sp_nexthop *nh) 2602 { 2603 struct mlxsw_sp_nexthop_group *nh_grp = nh->nh_grp; 2604 int i; 2605 2606 for (i = 0; i < nh_grp->count; i++) { 2607 struct mlxsw_sp_nexthop *nh_iter = &nh_grp->nexthops[i]; 2608 2609 if (nh_iter->type == MLXSW_SP_NEXTHOP_TYPE_IPIP) 2610 return true; 2611 } 2612 return false; 2613 } 2614 2615 static struct fib_info * 2616 mlxsw_sp_nexthop4_group_fi(const struct mlxsw_sp_nexthop_group *nh_grp) 2617 { 2618 return nh_grp->priv; 2619 } 2620 2621 struct mlxsw_sp_nexthop_group_cmp_arg { 2622 enum mlxsw_sp_l3proto proto; 2623 union { 2624 struct fib_info *fi; 2625 struct mlxsw_sp_fib6_entry *fib6_entry; 2626 }; 2627 }; 2628 2629 static bool 2630 mlxsw_sp_nexthop6_group_has_nexthop(const struct mlxsw_sp_nexthop_group *nh_grp, 2631 const struct in6_addr *gw, int ifindex) 2632 { 2633 int i; 2634 2635 for (i = 0; i < nh_grp->count; i++) { 2636 const struct mlxsw_sp_nexthop *nh; 2637 2638 nh = &nh_grp->nexthops[i]; 2639 if (nh->ifindex == ifindex && 2640 ipv6_addr_equal(gw, (struct in6_addr *) nh->gw_addr)) 2641 return true; 2642 } 2643 2644 return false; 2645 } 2646 2647 static bool 2648 mlxsw_sp_nexthop6_group_cmp(const struct mlxsw_sp_nexthop_group *nh_grp, 2649 const struct mlxsw_sp_fib6_entry *fib6_entry) 2650 { 2651 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 2652 2653 if (nh_grp->count != fib6_entry->nrt6) 2654 return false; 2655 2656 list_for_each_entry(mlxsw_sp_rt6, &fib6_entry->rt6_list, list) { 2657 struct in6_addr *gw; 2658 int ifindex; 2659 2660 ifindex = mlxsw_sp_rt6->rt->dst.dev->ifindex; 2661 gw = &mlxsw_sp_rt6->rt->rt6i_gateway; 2662 if (!mlxsw_sp_nexthop6_group_has_nexthop(nh_grp, gw, ifindex)) 2663 return false; 2664 } 2665 2666 return true; 2667 } 2668 2669 static int 2670 mlxsw_sp_nexthop_group_cmp(struct rhashtable_compare_arg *arg, const void *ptr) 2671 { 2672 const struct mlxsw_sp_nexthop_group_cmp_arg *cmp_arg = arg->key; 2673 const struct mlxsw_sp_nexthop_group *nh_grp = ptr; 2674 2675 switch (cmp_arg->proto) { 2676 case MLXSW_SP_L3_PROTO_IPV4: 2677 return cmp_arg->fi != mlxsw_sp_nexthop4_group_fi(nh_grp); 2678 case MLXSW_SP_L3_PROTO_IPV6: 2679 return !mlxsw_sp_nexthop6_group_cmp(nh_grp, 2680 cmp_arg->fib6_entry); 2681 default: 2682 WARN_ON(1); 2683 return 1; 2684 } 2685 } 2686 2687 static int 2688 mlxsw_sp_nexthop_group_type(const struct mlxsw_sp_nexthop_group *nh_grp) 2689 { 2690 return nh_grp->neigh_tbl->family; 2691 } 2692 2693 static u32 mlxsw_sp_nexthop_group_hash_obj(const void *data, u32 len, u32 seed) 2694 { 2695 const struct mlxsw_sp_nexthop_group *nh_grp = data; 2696 const struct mlxsw_sp_nexthop *nh; 2697 struct fib_info *fi; 2698 unsigned int val; 2699 int i; 2700 2701 switch (mlxsw_sp_nexthop_group_type(nh_grp)) { 2702 case AF_INET: 2703 fi = mlxsw_sp_nexthop4_group_fi(nh_grp); 2704 return jhash(&fi, sizeof(fi), seed); 2705 case AF_INET6: 2706 val = nh_grp->count; 2707 for (i = 0; i < nh_grp->count; i++) { 2708 nh = &nh_grp->nexthops[i]; 2709 val ^= nh->ifindex; 2710 } 2711 return jhash(&val, sizeof(val), seed); 2712 default: 2713 WARN_ON(1); 2714 return 0; 2715 } 2716 } 2717 2718 static u32 2719 mlxsw_sp_nexthop6_group_hash(struct mlxsw_sp_fib6_entry *fib6_entry, u32 seed) 2720 { 2721 unsigned int val = fib6_entry->nrt6; 2722 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 2723 struct net_device *dev; 2724 2725 list_for_each_entry(mlxsw_sp_rt6, &fib6_entry->rt6_list, list) { 2726 dev = mlxsw_sp_rt6->rt->dst.dev; 2727 val ^= dev->ifindex; 2728 } 2729 2730 return jhash(&val, sizeof(val), seed); 2731 } 2732 2733 static u32 2734 mlxsw_sp_nexthop_group_hash(const void *data, u32 len, u32 seed) 2735 { 2736 const struct mlxsw_sp_nexthop_group_cmp_arg *cmp_arg = data; 2737 2738 switch (cmp_arg->proto) { 2739 case MLXSW_SP_L3_PROTO_IPV4: 2740 return jhash(&cmp_arg->fi, sizeof(cmp_arg->fi), seed); 2741 case MLXSW_SP_L3_PROTO_IPV6: 2742 return mlxsw_sp_nexthop6_group_hash(cmp_arg->fib6_entry, seed); 2743 default: 2744 WARN_ON(1); 2745 return 0; 2746 } 2747 } 2748 2749 static const struct rhashtable_params mlxsw_sp_nexthop_group_ht_params = { 2750 .head_offset = offsetof(struct mlxsw_sp_nexthop_group, ht_node), 2751 .hashfn = mlxsw_sp_nexthop_group_hash, 2752 .obj_hashfn = mlxsw_sp_nexthop_group_hash_obj, 2753 .obj_cmpfn = mlxsw_sp_nexthop_group_cmp, 2754 }; 2755 2756 static int mlxsw_sp_nexthop_group_insert(struct mlxsw_sp *mlxsw_sp, 2757 struct mlxsw_sp_nexthop_group *nh_grp) 2758 { 2759 if (mlxsw_sp_nexthop_group_type(nh_grp) == AF_INET6 && 2760 !nh_grp->gateway) 2761 return 0; 2762 2763 return rhashtable_insert_fast(&mlxsw_sp->router->nexthop_group_ht, 2764 &nh_grp->ht_node, 2765 mlxsw_sp_nexthop_group_ht_params); 2766 } 2767 2768 static void mlxsw_sp_nexthop_group_remove(struct mlxsw_sp *mlxsw_sp, 2769 struct mlxsw_sp_nexthop_group *nh_grp) 2770 { 2771 if (mlxsw_sp_nexthop_group_type(nh_grp) == AF_INET6 && 2772 !nh_grp->gateway) 2773 return; 2774 2775 rhashtable_remove_fast(&mlxsw_sp->router->nexthop_group_ht, 2776 &nh_grp->ht_node, 2777 mlxsw_sp_nexthop_group_ht_params); 2778 } 2779 2780 static struct mlxsw_sp_nexthop_group * 2781 mlxsw_sp_nexthop4_group_lookup(struct mlxsw_sp *mlxsw_sp, 2782 struct fib_info *fi) 2783 { 2784 struct mlxsw_sp_nexthop_group_cmp_arg cmp_arg; 2785 2786 cmp_arg.proto = MLXSW_SP_L3_PROTO_IPV4; 2787 cmp_arg.fi = fi; 2788 return rhashtable_lookup_fast(&mlxsw_sp->router->nexthop_group_ht, 2789 &cmp_arg, 2790 mlxsw_sp_nexthop_group_ht_params); 2791 } 2792 2793 static struct mlxsw_sp_nexthop_group * 2794 mlxsw_sp_nexthop6_group_lookup(struct mlxsw_sp *mlxsw_sp, 2795 struct mlxsw_sp_fib6_entry *fib6_entry) 2796 { 2797 struct mlxsw_sp_nexthop_group_cmp_arg cmp_arg; 2798 2799 cmp_arg.proto = MLXSW_SP_L3_PROTO_IPV6; 2800 cmp_arg.fib6_entry = fib6_entry; 2801 return rhashtable_lookup_fast(&mlxsw_sp->router->nexthop_group_ht, 2802 &cmp_arg, 2803 mlxsw_sp_nexthop_group_ht_params); 2804 } 2805 2806 static const struct rhashtable_params mlxsw_sp_nexthop_ht_params = { 2807 .key_offset = offsetof(struct mlxsw_sp_nexthop, key), 2808 .head_offset = offsetof(struct mlxsw_sp_nexthop, ht_node), 2809 .key_len = sizeof(struct mlxsw_sp_nexthop_key), 2810 }; 2811 2812 static int mlxsw_sp_nexthop_insert(struct mlxsw_sp *mlxsw_sp, 2813 struct mlxsw_sp_nexthop *nh) 2814 { 2815 return rhashtable_insert_fast(&mlxsw_sp->router->nexthop_ht, 2816 &nh->ht_node, mlxsw_sp_nexthop_ht_params); 2817 } 2818 2819 static void mlxsw_sp_nexthop_remove(struct mlxsw_sp *mlxsw_sp, 2820 struct mlxsw_sp_nexthop *nh) 2821 { 2822 rhashtable_remove_fast(&mlxsw_sp->router->nexthop_ht, &nh->ht_node, 2823 mlxsw_sp_nexthop_ht_params); 2824 } 2825 2826 static struct mlxsw_sp_nexthop * 2827 mlxsw_sp_nexthop_lookup(struct mlxsw_sp *mlxsw_sp, 2828 struct mlxsw_sp_nexthop_key key) 2829 { 2830 return rhashtable_lookup_fast(&mlxsw_sp->router->nexthop_ht, &key, 2831 mlxsw_sp_nexthop_ht_params); 2832 } 2833 2834 static int mlxsw_sp_adj_index_mass_update_vr(struct mlxsw_sp *mlxsw_sp, 2835 const struct mlxsw_sp_fib *fib, 2836 u32 adj_index, u16 ecmp_size, 2837 u32 new_adj_index, 2838 u16 new_ecmp_size) 2839 { 2840 char raleu_pl[MLXSW_REG_RALEU_LEN]; 2841 2842 mlxsw_reg_raleu_pack(raleu_pl, 2843 (enum mlxsw_reg_ralxx_protocol) fib->proto, 2844 fib->vr->id, adj_index, ecmp_size, new_adj_index, 2845 new_ecmp_size); 2846 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(raleu), raleu_pl); 2847 } 2848 2849 static int mlxsw_sp_adj_index_mass_update(struct mlxsw_sp *mlxsw_sp, 2850 struct mlxsw_sp_nexthop_group *nh_grp, 2851 u32 old_adj_index, u16 old_ecmp_size) 2852 { 2853 struct mlxsw_sp_fib_entry *fib_entry; 2854 struct mlxsw_sp_fib *fib = NULL; 2855 int err; 2856 2857 list_for_each_entry(fib_entry, &nh_grp->fib_list, nexthop_group_node) { 2858 if (fib == fib_entry->fib_node->fib) 2859 continue; 2860 fib = fib_entry->fib_node->fib; 2861 err = mlxsw_sp_adj_index_mass_update_vr(mlxsw_sp, fib, 2862 old_adj_index, 2863 old_ecmp_size, 2864 nh_grp->adj_index, 2865 nh_grp->ecmp_size); 2866 if (err) 2867 return err; 2868 } 2869 return 0; 2870 } 2871 2872 static int __mlxsw_sp_nexthop_update(struct mlxsw_sp *mlxsw_sp, u32 adj_index, 2873 struct mlxsw_sp_nexthop *nh) 2874 { 2875 struct mlxsw_sp_neigh_entry *neigh_entry = nh->neigh_entry; 2876 char ratr_pl[MLXSW_REG_RATR_LEN]; 2877 2878 mlxsw_reg_ratr_pack(ratr_pl, MLXSW_REG_RATR_OP_WRITE_WRITE_ENTRY, 2879 true, MLXSW_REG_RATR_TYPE_ETHERNET, 2880 adj_index, neigh_entry->rif); 2881 mlxsw_reg_ratr_eth_entry_pack(ratr_pl, neigh_entry->ha); 2882 if (nh->counter_valid) 2883 mlxsw_reg_ratr_counter_pack(ratr_pl, nh->counter_index, true); 2884 else 2885 mlxsw_reg_ratr_counter_pack(ratr_pl, 0, false); 2886 2887 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ratr), ratr_pl); 2888 } 2889 2890 int mlxsw_sp_nexthop_update(struct mlxsw_sp *mlxsw_sp, u32 adj_index, 2891 struct mlxsw_sp_nexthop *nh) 2892 { 2893 int i; 2894 2895 for (i = 0; i < nh->num_adj_entries; i++) { 2896 int err; 2897 2898 err = __mlxsw_sp_nexthop_update(mlxsw_sp, adj_index + i, nh); 2899 if (err) 2900 return err; 2901 } 2902 2903 return 0; 2904 } 2905 2906 static int __mlxsw_sp_nexthop_ipip_update(struct mlxsw_sp *mlxsw_sp, 2907 u32 adj_index, 2908 struct mlxsw_sp_nexthop *nh) 2909 { 2910 const struct mlxsw_sp_ipip_ops *ipip_ops; 2911 2912 ipip_ops = mlxsw_sp->router->ipip_ops_arr[nh->ipip_entry->ipipt]; 2913 return ipip_ops->nexthop_update(mlxsw_sp, adj_index, nh->ipip_entry); 2914 } 2915 2916 static int mlxsw_sp_nexthop_ipip_update(struct mlxsw_sp *mlxsw_sp, 2917 u32 adj_index, 2918 struct mlxsw_sp_nexthop *nh) 2919 { 2920 int i; 2921 2922 for (i = 0; i < nh->num_adj_entries; i++) { 2923 int err; 2924 2925 err = __mlxsw_sp_nexthop_ipip_update(mlxsw_sp, adj_index + i, 2926 nh); 2927 if (err) 2928 return err; 2929 } 2930 2931 return 0; 2932 } 2933 2934 static int 2935 mlxsw_sp_nexthop_group_update(struct mlxsw_sp *mlxsw_sp, 2936 struct mlxsw_sp_nexthop_group *nh_grp, 2937 bool reallocate) 2938 { 2939 u32 adj_index = nh_grp->adj_index; /* base */ 2940 struct mlxsw_sp_nexthop *nh; 2941 int i; 2942 int err; 2943 2944 for (i = 0; i < nh_grp->count; i++) { 2945 nh = &nh_grp->nexthops[i]; 2946 2947 if (!nh->should_offload) { 2948 nh->offloaded = 0; 2949 continue; 2950 } 2951 2952 if (nh->update || reallocate) { 2953 switch (nh->type) { 2954 case MLXSW_SP_NEXTHOP_TYPE_ETH: 2955 err = mlxsw_sp_nexthop_update 2956 (mlxsw_sp, adj_index, nh); 2957 break; 2958 case MLXSW_SP_NEXTHOP_TYPE_IPIP: 2959 err = mlxsw_sp_nexthop_ipip_update 2960 (mlxsw_sp, adj_index, nh); 2961 break; 2962 } 2963 if (err) 2964 return err; 2965 nh->update = 0; 2966 nh->offloaded = 1; 2967 } 2968 adj_index += nh->num_adj_entries; 2969 } 2970 return 0; 2971 } 2972 2973 static bool 2974 mlxsw_sp_fib_node_entry_is_first(const struct mlxsw_sp_fib_node *fib_node, 2975 const struct mlxsw_sp_fib_entry *fib_entry); 2976 2977 static int 2978 mlxsw_sp_nexthop_fib_entries_update(struct mlxsw_sp *mlxsw_sp, 2979 struct mlxsw_sp_nexthop_group *nh_grp) 2980 { 2981 struct mlxsw_sp_fib_entry *fib_entry; 2982 int err; 2983 2984 list_for_each_entry(fib_entry, &nh_grp->fib_list, nexthop_group_node) { 2985 if (!mlxsw_sp_fib_node_entry_is_first(fib_entry->fib_node, 2986 fib_entry)) 2987 continue; 2988 err = mlxsw_sp_fib_entry_update(mlxsw_sp, fib_entry); 2989 if (err) 2990 return err; 2991 } 2992 return 0; 2993 } 2994 2995 static void 2996 mlxsw_sp_fib_entry_offload_refresh(struct mlxsw_sp_fib_entry *fib_entry, 2997 enum mlxsw_reg_ralue_op op, int err); 2998 2999 static void 3000 mlxsw_sp_nexthop_fib_entries_refresh(struct mlxsw_sp_nexthop_group *nh_grp) 3001 { 3002 enum mlxsw_reg_ralue_op op = MLXSW_REG_RALUE_OP_WRITE_WRITE; 3003 struct mlxsw_sp_fib_entry *fib_entry; 3004 3005 list_for_each_entry(fib_entry, &nh_grp->fib_list, nexthop_group_node) { 3006 if (!mlxsw_sp_fib_node_entry_is_first(fib_entry->fib_node, 3007 fib_entry)) 3008 continue; 3009 mlxsw_sp_fib_entry_offload_refresh(fib_entry, op, 0); 3010 } 3011 } 3012 3013 static void mlxsw_sp_adj_grp_size_round_up(u16 *p_adj_grp_size) 3014 { 3015 /* Valid sizes for an adjacency group are: 3016 * 1-64, 512, 1024, 2048 and 4096. 3017 */ 3018 if (*p_adj_grp_size <= 64) 3019 return; 3020 else if (*p_adj_grp_size <= 512) 3021 *p_adj_grp_size = 512; 3022 else if (*p_adj_grp_size <= 1024) 3023 *p_adj_grp_size = 1024; 3024 else if (*p_adj_grp_size <= 2048) 3025 *p_adj_grp_size = 2048; 3026 else 3027 *p_adj_grp_size = 4096; 3028 } 3029 3030 static void mlxsw_sp_adj_grp_size_round_down(u16 *p_adj_grp_size, 3031 unsigned int alloc_size) 3032 { 3033 if (alloc_size >= 4096) 3034 *p_adj_grp_size = 4096; 3035 else if (alloc_size >= 2048) 3036 *p_adj_grp_size = 2048; 3037 else if (alloc_size >= 1024) 3038 *p_adj_grp_size = 1024; 3039 else if (alloc_size >= 512) 3040 *p_adj_grp_size = 512; 3041 } 3042 3043 static int mlxsw_sp_fix_adj_grp_size(struct mlxsw_sp *mlxsw_sp, 3044 u16 *p_adj_grp_size) 3045 { 3046 unsigned int alloc_size; 3047 int err; 3048 3049 /* Round up the requested group size to the next size supported 3050 * by the device and make sure the request can be satisfied. 3051 */ 3052 mlxsw_sp_adj_grp_size_round_up(p_adj_grp_size); 3053 err = mlxsw_sp_kvdl_alloc_size_query(mlxsw_sp, *p_adj_grp_size, 3054 &alloc_size); 3055 if (err) 3056 return err; 3057 /* It is possible the allocation results in more allocated 3058 * entries than requested. Try to use as much of them as 3059 * possible. 3060 */ 3061 mlxsw_sp_adj_grp_size_round_down(p_adj_grp_size, alloc_size); 3062 3063 return 0; 3064 } 3065 3066 static void 3067 mlxsw_sp_nexthop_group_normalize(struct mlxsw_sp_nexthop_group *nh_grp) 3068 { 3069 int i, g = 0, sum_norm_weight = 0; 3070 struct mlxsw_sp_nexthop *nh; 3071 3072 for (i = 0; i < nh_grp->count; i++) { 3073 nh = &nh_grp->nexthops[i]; 3074 3075 if (!nh->should_offload) 3076 continue; 3077 if (g > 0) 3078 g = gcd(nh->nh_weight, g); 3079 else 3080 g = nh->nh_weight; 3081 } 3082 3083 for (i = 0; i < nh_grp->count; i++) { 3084 nh = &nh_grp->nexthops[i]; 3085 3086 if (!nh->should_offload) 3087 continue; 3088 nh->norm_nh_weight = nh->nh_weight / g; 3089 sum_norm_weight += nh->norm_nh_weight; 3090 } 3091 3092 nh_grp->sum_norm_weight = sum_norm_weight; 3093 } 3094 3095 static void 3096 mlxsw_sp_nexthop_group_rebalance(struct mlxsw_sp_nexthop_group *nh_grp) 3097 { 3098 int total = nh_grp->sum_norm_weight; 3099 u16 ecmp_size = nh_grp->ecmp_size; 3100 int i, weight = 0, lower_bound = 0; 3101 3102 for (i = 0; i < nh_grp->count; i++) { 3103 struct mlxsw_sp_nexthop *nh = &nh_grp->nexthops[i]; 3104 int upper_bound; 3105 3106 if (!nh->should_offload) 3107 continue; 3108 weight += nh->norm_nh_weight; 3109 upper_bound = DIV_ROUND_CLOSEST(ecmp_size * weight, total); 3110 nh->num_adj_entries = upper_bound - lower_bound; 3111 lower_bound = upper_bound; 3112 } 3113 } 3114 3115 static void 3116 mlxsw_sp_nexthop_group_refresh(struct mlxsw_sp *mlxsw_sp, 3117 struct mlxsw_sp_nexthop_group *nh_grp) 3118 { 3119 u16 ecmp_size, old_ecmp_size; 3120 struct mlxsw_sp_nexthop *nh; 3121 bool offload_change = false; 3122 u32 adj_index; 3123 bool old_adj_index_valid; 3124 u32 old_adj_index; 3125 int i; 3126 int err; 3127 3128 if (!nh_grp->gateway) { 3129 mlxsw_sp_nexthop_fib_entries_update(mlxsw_sp, nh_grp); 3130 return; 3131 } 3132 3133 for (i = 0; i < nh_grp->count; i++) { 3134 nh = &nh_grp->nexthops[i]; 3135 3136 if (nh->should_offload != nh->offloaded) { 3137 offload_change = true; 3138 if (nh->should_offload) 3139 nh->update = 1; 3140 } 3141 } 3142 if (!offload_change) { 3143 /* Nothing was added or removed, so no need to reallocate. Just 3144 * update MAC on existing adjacency indexes. 3145 */ 3146 err = mlxsw_sp_nexthop_group_update(mlxsw_sp, nh_grp, false); 3147 if (err) { 3148 dev_warn(mlxsw_sp->bus_info->dev, "Failed to update neigh MAC in adjacency table.\n"); 3149 goto set_trap; 3150 } 3151 return; 3152 } 3153 mlxsw_sp_nexthop_group_normalize(nh_grp); 3154 if (!nh_grp->sum_norm_weight) 3155 /* No neigh of this group is connected so we just set 3156 * the trap and let everthing flow through kernel. 3157 */ 3158 goto set_trap; 3159 3160 ecmp_size = nh_grp->sum_norm_weight; 3161 err = mlxsw_sp_fix_adj_grp_size(mlxsw_sp, &ecmp_size); 3162 if (err) 3163 /* No valid allocation size available. */ 3164 goto set_trap; 3165 3166 err = mlxsw_sp_kvdl_alloc(mlxsw_sp, ecmp_size, &adj_index); 3167 if (err) { 3168 /* We ran out of KVD linear space, just set the 3169 * trap and let everything flow through kernel. 3170 */ 3171 dev_warn(mlxsw_sp->bus_info->dev, "Failed to allocate KVD linear area for nexthop group.\n"); 3172 goto set_trap; 3173 } 3174 old_adj_index_valid = nh_grp->adj_index_valid; 3175 old_adj_index = nh_grp->adj_index; 3176 old_ecmp_size = nh_grp->ecmp_size; 3177 nh_grp->adj_index_valid = 1; 3178 nh_grp->adj_index = adj_index; 3179 nh_grp->ecmp_size = ecmp_size; 3180 mlxsw_sp_nexthop_group_rebalance(nh_grp); 3181 err = mlxsw_sp_nexthop_group_update(mlxsw_sp, nh_grp, true); 3182 if (err) { 3183 dev_warn(mlxsw_sp->bus_info->dev, "Failed to update neigh MAC in adjacency table.\n"); 3184 goto set_trap; 3185 } 3186 3187 if (!old_adj_index_valid) { 3188 /* The trap was set for fib entries, so we have to call 3189 * fib entry update to unset it and use adjacency index. 3190 */ 3191 err = mlxsw_sp_nexthop_fib_entries_update(mlxsw_sp, nh_grp); 3192 if (err) { 3193 dev_warn(mlxsw_sp->bus_info->dev, "Failed to add adjacency index to fib entries.\n"); 3194 goto set_trap; 3195 } 3196 return; 3197 } 3198 3199 err = mlxsw_sp_adj_index_mass_update(mlxsw_sp, nh_grp, 3200 old_adj_index, old_ecmp_size); 3201 mlxsw_sp_kvdl_free(mlxsw_sp, old_adj_index); 3202 if (err) { 3203 dev_warn(mlxsw_sp->bus_info->dev, "Failed to mass-update adjacency index for nexthop group.\n"); 3204 goto set_trap; 3205 } 3206 3207 /* Offload state within the group changed, so update the flags. */ 3208 mlxsw_sp_nexthop_fib_entries_refresh(nh_grp); 3209 3210 return; 3211 3212 set_trap: 3213 old_adj_index_valid = nh_grp->adj_index_valid; 3214 nh_grp->adj_index_valid = 0; 3215 for (i = 0; i < nh_grp->count; i++) { 3216 nh = &nh_grp->nexthops[i]; 3217 nh->offloaded = 0; 3218 } 3219 err = mlxsw_sp_nexthop_fib_entries_update(mlxsw_sp, nh_grp); 3220 if (err) 3221 dev_warn(mlxsw_sp->bus_info->dev, "Failed to set traps for fib entries.\n"); 3222 if (old_adj_index_valid) 3223 mlxsw_sp_kvdl_free(mlxsw_sp, nh_grp->adj_index); 3224 } 3225 3226 static void __mlxsw_sp_nexthop_neigh_update(struct mlxsw_sp_nexthop *nh, 3227 bool removing) 3228 { 3229 if (!removing) 3230 nh->should_offload = 1; 3231 else if (nh->offloaded) 3232 nh->should_offload = 0; 3233 nh->update = 1; 3234 } 3235 3236 static void 3237 mlxsw_sp_nexthop_neigh_update(struct mlxsw_sp *mlxsw_sp, 3238 struct mlxsw_sp_neigh_entry *neigh_entry, 3239 bool removing) 3240 { 3241 struct mlxsw_sp_nexthop *nh; 3242 3243 list_for_each_entry(nh, &neigh_entry->nexthop_list, 3244 neigh_list_node) { 3245 __mlxsw_sp_nexthop_neigh_update(nh, removing); 3246 mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh->nh_grp); 3247 } 3248 } 3249 3250 static void mlxsw_sp_nexthop_rif_init(struct mlxsw_sp_nexthop *nh, 3251 struct mlxsw_sp_rif *rif) 3252 { 3253 if (nh->rif) 3254 return; 3255 3256 nh->rif = rif; 3257 list_add(&nh->rif_list_node, &rif->nexthop_list); 3258 } 3259 3260 static void mlxsw_sp_nexthop_rif_fini(struct mlxsw_sp_nexthop *nh) 3261 { 3262 if (!nh->rif) 3263 return; 3264 3265 list_del(&nh->rif_list_node); 3266 nh->rif = NULL; 3267 } 3268 3269 static int mlxsw_sp_nexthop_neigh_init(struct mlxsw_sp *mlxsw_sp, 3270 struct mlxsw_sp_nexthop *nh) 3271 { 3272 struct mlxsw_sp_neigh_entry *neigh_entry; 3273 struct neighbour *n; 3274 u8 nud_state, dead; 3275 int err; 3276 3277 if (!nh->nh_grp->gateway || nh->neigh_entry) 3278 return 0; 3279 3280 /* Take a reference of neigh here ensuring that neigh would 3281 * not be destructed before the nexthop entry is finished. 3282 * The reference is taken either in neigh_lookup() or 3283 * in neigh_create() in case n is not found. 3284 */ 3285 n = neigh_lookup(nh->nh_grp->neigh_tbl, &nh->gw_addr, nh->rif->dev); 3286 if (!n) { 3287 n = neigh_create(nh->nh_grp->neigh_tbl, &nh->gw_addr, 3288 nh->rif->dev); 3289 if (IS_ERR(n)) 3290 return PTR_ERR(n); 3291 neigh_event_send(n, NULL); 3292 } 3293 neigh_entry = mlxsw_sp_neigh_entry_lookup(mlxsw_sp, n); 3294 if (!neigh_entry) { 3295 neigh_entry = mlxsw_sp_neigh_entry_create(mlxsw_sp, n); 3296 if (IS_ERR(neigh_entry)) { 3297 err = -EINVAL; 3298 goto err_neigh_entry_create; 3299 } 3300 } 3301 3302 /* If that is the first nexthop connected to that neigh, add to 3303 * nexthop_neighs_list 3304 */ 3305 if (list_empty(&neigh_entry->nexthop_list)) 3306 list_add_tail(&neigh_entry->nexthop_neighs_list_node, 3307 &mlxsw_sp->router->nexthop_neighs_list); 3308 3309 nh->neigh_entry = neigh_entry; 3310 list_add_tail(&nh->neigh_list_node, &neigh_entry->nexthop_list); 3311 read_lock_bh(&n->lock); 3312 nud_state = n->nud_state; 3313 dead = n->dead; 3314 read_unlock_bh(&n->lock); 3315 __mlxsw_sp_nexthop_neigh_update(nh, !(nud_state & NUD_VALID && !dead)); 3316 3317 return 0; 3318 3319 err_neigh_entry_create: 3320 neigh_release(n); 3321 return err; 3322 } 3323 3324 static void mlxsw_sp_nexthop_neigh_fini(struct mlxsw_sp *mlxsw_sp, 3325 struct mlxsw_sp_nexthop *nh) 3326 { 3327 struct mlxsw_sp_neigh_entry *neigh_entry = nh->neigh_entry; 3328 struct neighbour *n; 3329 3330 if (!neigh_entry) 3331 return; 3332 n = neigh_entry->key.n; 3333 3334 __mlxsw_sp_nexthop_neigh_update(nh, true); 3335 list_del(&nh->neigh_list_node); 3336 nh->neigh_entry = NULL; 3337 3338 /* If that is the last nexthop connected to that neigh, remove from 3339 * nexthop_neighs_list 3340 */ 3341 if (list_empty(&neigh_entry->nexthop_list)) 3342 list_del(&neigh_entry->nexthop_neighs_list_node); 3343 3344 if (!neigh_entry->connected && list_empty(&neigh_entry->nexthop_list)) 3345 mlxsw_sp_neigh_entry_destroy(mlxsw_sp, neigh_entry); 3346 3347 neigh_release(n); 3348 } 3349 3350 static bool mlxsw_sp_ipip_netdev_ul_up(struct net_device *ol_dev) 3351 { 3352 struct net_device *ul_dev = __mlxsw_sp_ipip_netdev_ul_dev_get(ol_dev); 3353 3354 return ul_dev ? (ul_dev->flags & IFF_UP) : true; 3355 } 3356 3357 static void mlxsw_sp_nexthop_ipip_init(struct mlxsw_sp *mlxsw_sp, 3358 struct mlxsw_sp_nexthop *nh, 3359 struct mlxsw_sp_ipip_entry *ipip_entry) 3360 { 3361 bool removing; 3362 3363 if (!nh->nh_grp->gateway || nh->ipip_entry) 3364 return; 3365 3366 nh->ipip_entry = ipip_entry; 3367 removing = !mlxsw_sp_ipip_netdev_ul_up(ipip_entry->ol_dev); 3368 __mlxsw_sp_nexthop_neigh_update(nh, removing); 3369 mlxsw_sp_nexthop_rif_init(nh, &ipip_entry->ol_lb->common); 3370 } 3371 3372 static void mlxsw_sp_nexthop_ipip_fini(struct mlxsw_sp *mlxsw_sp, 3373 struct mlxsw_sp_nexthop *nh) 3374 { 3375 struct mlxsw_sp_ipip_entry *ipip_entry = nh->ipip_entry; 3376 3377 if (!ipip_entry) 3378 return; 3379 3380 __mlxsw_sp_nexthop_neigh_update(nh, true); 3381 nh->ipip_entry = NULL; 3382 } 3383 3384 static bool mlxsw_sp_nexthop4_ipip_type(const struct mlxsw_sp *mlxsw_sp, 3385 const struct fib_nh *fib_nh, 3386 enum mlxsw_sp_ipip_type *p_ipipt) 3387 { 3388 struct net_device *dev = fib_nh->nh_dev; 3389 3390 return dev && 3391 fib_nh->nh_parent->fib_type == RTN_UNICAST && 3392 mlxsw_sp_netdev_ipip_type(mlxsw_sp, dev, p_ipipt); 3393 } 3394 3395 static void mlxsw_sp_nexthop_type_fini(struct mlxsw_sp *mlxsw_sp, 3396 struct mlxsw_sp_nexthop *nh) 3397 { 3398 switch (nh->type) { 3399 case MLXSW_SP_NEXTHOP_TYPE_ETH: 3400 mlxsw_sp_nexthop_neigh_fini(mlxsw_sp, nh); 3401 mlxsw_sp_nexthop_rif_fini(nh); 3402 break; 3403 case MLXSW_SP_NEXTHOP_TYPE_IPIP: 3404 mlxsw_sp_nexthop_rif_fini(nh); 3405 mlxsw_sp_nexthop_ipip_fini(mlxsw_sp, nh); 3406 break; 3407 } 3408 } 3409 3410 static int mlxsw_sp_nexthop4_type_init(struct mlxsw_sp *mlxsw_sp, 3411 struct mlxsw_sp_nexthop *nh, 3412 struct fib_nh *fib_nh) 3413 { 3414 const struct mlxsw_sp_ipip_ops *ipip_ops; 3415 struct net_device *dev = fib_nh->nh_dev; 3416 struct mlxsw_sp_ipip_entry *ipip_entry; 3417 struct mlxsw_sp_rif *rif; 3418 int err; 3419 3420 ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, dev); 3421 if (ipip_entry) { 3422 ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt]; 3423 if (ipip_ops->can_offload(mlxsw_sp, dev, 3424 MLXSW_SP_L3_PROTO_IPV4)) { 3425 nh->type = MLXSW_SP_NEXTHOP_TYPE_IPIP; 3426 mlxsw_sp_nexthop_ipip_init(mlxsw_sp, nh, ipip_entry); 3427 return 0; 3428 } 3429 } 3430 3431 nh->type = MLXSW_SP_NEXTHOP_TYPE_ETH; 3432 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); 3433 if (!rif) 3434 return 0; 3435 3436 mlxsw_sp_nexthop_rif_init(nh, rif); 3437 err = mlxsw_sp_nexthop_neigh_init(mlxsw_sp, nh); 3438 if (err) 3439 goto err_neigh_init; 3440 3441 return 0; 3442 3443 err_neigh_init: 3444 mlxsw_sp_nexthop_rif_fini(nh); 3445 return err; 3446 } 3447 3448 static void mlxsw_sp_nexthop4_type_fini(struct mlxsw_sp *mlxsw_sp, 3449 struct mlxsw_sp_nexthop *nh) 3450 { 3451 mlxsw_sp_nexthop_type_fini(mlxsw_sp, nh); 3452 } 3453 3454 static int mlxsw_sp_nexthop4_init(struct mlxsw_sp *mlxsw_sp, 3455 struct mlxsw_sp_nexthop_group *nh_grp, 3456 struct mlxsw_sp_nexthop *nh, 3457 struct fib_nh *fib_nh) 3458 { 3459 struct net_device *dev = fib_nh->nh_dev; 3460 struct in_device *in_dev; 3461 int err; 3462 3463 nh->nh_grp = nh_grp; 3464 nh->key.fib_nh = fib_nh; 3465 #ifdef CONFIG_IP_ROUTE_MULTIPATH 3466 nh->nh_weight = fib_nh->nh_weight; 3467 #else 3468 nh->nh_weight = 1; 3469 #endif 3470 memcpy(&nh->gw_addr, &fib_nh->nh_gw, sizeof(fib_nh->nh_gw)); 3471 err = mlxsw_sp_nexthop_insert(mlxsw_sp, nh); 3472 if (err) 3473 return err; 3474 3475 mlxsw_sp_nexthop_counter_alloc(mlxsw_sp, nh); 3476 list_add_tail(&nh->router_list_node, &mlxsw_sp->router->nexthop_list); 3477 3478 if (!dev) 3479 return 0; 3480 3481 in_dev = __in_dev_get_rtnl(dev); 3482 if (in_dev && IN_DEV_IGNORE_ROUTES_WITH_LINKDOWN(in_dev) && 3483 fib_nh->nh_flags & RTNH_F_LINKDOWN) 3484 return 0; 3485 3486 err = mlxsw_sp_nexthop4_type_init(mlxsw_sp, nh, fib_nh); 3487 if (err) 3488 goto err_nexthop_neigh_init; 3489 3490 return 0; 3491 3492 err_nexthop_neigh_init: 3493 mlxsw_sp_nexthop_remove(mlxsw_sp, nh); 3494 return err; 3495 } 3496 3497 static void mlxsw_sp_nexthop4_fini(struct mlxsw_sp *mlxsw_sp, 3498 struct mlxsw_sp_nexthop *nh) 3499 { 3500 mlxsw_sp_nexthop4_type_fini(mlxsw_sp, nh); 3501 list_del(&nh->router_list_node); 3502 mlxsw_sp_nexthop_counter_free(mlxsw_sp, nh); 3503 mlxsw_sp_nexthop_remove(mlxsw_sp, nh); 3504 } 3505 3506 static void mlxsw_sp_nexthop4_event(struct mlxsw_sp *mlxsw_sp, 3507 unsigned long event, struct fib_nh *fib_nh) 3508 { 3509 struct mlxsw_sp_nexthop_key key; 3510 struct mlxsw_sp_nexthop *nh; 3511 3512 if (mlxsw_sp->router->aborted) 3513 return; 3514 3515 key.fib_nh = fib_nh; 3516 nh = mlxsw_sp_nexthop_lookup(mlxsw_sp, key); 3517 if (WARN_ON_ONCE(!nh)) 3518 return; 3519 3520 switch (event) { 3521 case FIB_EVENT_NH_ADD: 3522 mlxsw_sp_nexthop4_type_init(mlxsw_sp, nh, fib_nh); 3523 break; 3524 case FIB_EVENT_NH_DEL: 3525 mlxsw_sp_nexthop4_type_fini(mlxsw_sp, nh); 3526 break; 3527 } 3528 3529 mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh->nh_grp); 3530 } 3531 3532 static void mlxsw_sp_nexthop_rif_update(struct mlxsw_sp *mlxsw_sp, 3533 struct mlxsw_sp_rif *rif) 3534 { 3535 struct mlxsw_sp_nexthop *nh; 3536 bool removing; 3537 3538 list_for_each_entry(nh, &rif->nexthop_list, rif_list_node) { 3539 switch (nh->type) { 3540 case MLXSW_SP_NEXTHOP_TYPE_ETH: 3541 removing = false; 3542 break; 3543 case MLXSW_SP_NEXTHOP_TYPE_IPIP: 3544 removing = !mlxsw_sp_ipip_netdev_ul_up(rif->dev); 3545 break; 3546 default: 3547 WARN_ON(1); 3548 continue; 3549 } 3550 3551 __mlxsw_sp_nexthop_neigh_update(nh, removing); 3552 mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh->nh_grp); 3553 } 3554 } 3555 3556 static void mlxsw_sp_nexthop_rif_migrate(struct mlxsw_sp *mlxsw_sp, 3557 struct mlxsw_sp_rif *old_rif, 3558 struct mlxsw_sp_rif *new_rif) 3559 { 3560 struct mlxsw_sp_nexthop *nh; 3561 3562 list_splice_init(&old_rif->nexthop_list, &new_rif->nexthop_list); 3563 list_for_each_entry(nh, &new_rif->nexthop_list, rif_list_node) 3564 nh->rif = new_rif; 3565 mlxsw_sp_nexthop_rif_update(mlxsw_sp, new_rif); 3566 } 3567 3568 static void mlxsw_sp_nexthop_rif_gone_sync(struct mlxsw_sp *mlxsw_sp, 3569 struct mlxsw_sp_rif *rif) 3570 { 3571 struct mlxsw_sp_nexthop *nh, *tmp; 3572 3573 list_for_each_entry_safe(nh, tmp, &rif->nexthop_list, rif_list_node) { 3574 mlxsw_sp_nexthop_type_fini(mlxsw_sp, nh); 3575 mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh->nh_grp); 3576 } 3577 } 3578 3579 static bool mlxsw_sp_fi_is_gateway(const struct mlxsw_sp *mlxsw_sp, 3580 const struct fib_info *fi) 3581 { 3582 return fi->fib_nh->nh_scope == RT_SCOPE_LINK || 3583 mlxsw_sp_nexthop4_ipip_type(mlxsw_sp, fi->fib_nh, NULL); 3584 } 3585 3586 static struct mlxsw_sp_nexthop_group * 3587 mlxsw_sp_nexthop4_group_create(struct mlxsw_sp *mlxsw_sp, struct fib_info *fi) 3588 { 3589 struct mlxsw_sp_nexthop_group *nh_grp; 3590 struct mlxsw_sp_nexthop *nh; 3591 struct fib_nh *fib_nh; 3592 size_t alloc_size; 3593 int i; 3594 int err; 3595 3596 alloc_size = sizeof(*nh_grp) + 3597 fi->fib_nhs * sizeof(struct mlxsw_sp_nexthop); 3598 nh_grp = kzalloc(alloc_size, GFP_KERNEL); 3599 if (!nh_grp) 3600 return ERR_PTR(-ENOMEM); 3601 nh_grp->priv = fi; 3602 INIT_LIST_HEAD(&nh_grp->fib_list); 3603 nh_grp->neigh_tbl = &arp_tbl; 3604 3605 nh_grp->gateway = mlxsw_sp_fi_is_gateway(mlxsw_sp, fi); 3606 nh_grp->count = fi->fib_nhs; 3607 fib_info_hold(fi); 3608 for (i = 0; i < nh_grp->count; i++) { 3609 nh = &nh_grp->nexthops[i]; 3610 fib_nh = &fi->fib_nh[i]; 3611 err = mlxsw_sp_nexthop4_init(mlxsw_sp, nh_grp, nh, fib_nh); 3612 if (err) 3613 goto err_nexthop4_init; 3614 } 3615 err = mlxsw_sp_nexthop_group_insert(mlxsw_sp, nh_grp); 3616 if (err) 3617 goto err_nexthop_group_insert; 3618 mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh_grp); 3619 return nh_grp; 3620 3621 err_nexthop_group_insert: 3622 err_nexthop4_init: 3623 for (i--; i >= 0; i--) { 3624 nh = &nh_grp->nexthops[i]; 3625 mlxsw_sp_nexthop4_fini(mlxsw_sp, nh); 3626 } 3627 fib_info_put(fi); 3628 kfree(nh_grp); 3629 return ERR_PTR(err); 3630 } 3631 3632 static void 3633 mlxsw_sp_nexthop4_group_destroy(struct mlxsw_sp *mlxsw_sp, 3634 struct mlxsw_sp_nexthop_group *nh_grp) 3635 { 3636 struct mlxsw_sp_nexthop *nh; 3637 int i; 3638 3639 mlxsw_sp_nexthop_group_remove(mlxsw_sp, nh_grp); 3640 for (i = 0; i < nh_grp->count; i++) { 3641 nh = &nh_grp->nexthops[i]; 3642 mlxsw_sp_nexthop4_fini(mlxsw_sp, nh); 3643 } 3644 mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh_grp); 3645 WARN_ON_ONCE(nh_grp->adj_index_valid); 3646 fib_info_put(mlxsw_sp_nexthop4_group_fi(nh_grp)); 3647 kfree(nh_grp); 3648 } 3649 3650 static int mlxsw_sp_nexthop4_group_get(struct mlxsw_sp *mlxsw_sp, 3651 struct mlxsw_sp_fib_entry *fib_entry, 3652 struct fib_info *fi) 3653 { 3654 struct mlxsw_sp_nexthop_group *nh_grp; 3655 3656 nh_grp = mlxsw_sp_nexthop4_group_lookup(mlxsw_sp, fi); 3657 if (!nh_grp) { 3658 nh_grp = mlxsw_sp_nexthop4_group_create(mlxsw_sp, fi); 3659 if (IS_ERR(nh_grp)) 3660 return PTR_ERR(nh_grp); 3661 } 3662 list_add_tail(&fib_entry->nexthop_group_node, &nh_grp->fib_list); 3663 fib_entry->nh_group = nh_grp; 3664 return 0; 3665 } 3666 3667 static void mlxsw_sp_nexthop4_group_put(struct mlxsw_sp *mlxsw_sp, 3668 struct mlxsw_sp_fib_entry *fib_entry) 3669 { 3670 struct mlxsw_sp_nexthop_group *nh_grp = fib_entry->nh_group; 3671 3672 list_del(&fib_entry->nexthop_group_node); 3673 if (!list_empty(&nh_grp->fib_list)) 3674 return; 3675 mlxsw_sp_nexthop4_group_destroy(mlxsw_sp, nh_grp); 3676 } 3677 3678 static bool 3679 mlxsw_sp_fib4_entry_should_offload(const struct mlxsw_sp_fib_entry *fib_entry) 3680 { 3681 struct mlxsw_sp_fib4_entry *fib4_entry; 3682 3683 fib4_entry = container_of(fib_entry, struct mlxsw_sp_fib4_entry, 3684 common); 3685 return !fib4_entry->tos; 3686 } 3687 3688 static bool 3689 mlxsw_sp_fib_entry_should_offload(const struct mlxsw_sp_fib_entry *fib_entry) 3690 { 3691 struct mlxsw_sp_nexthop_group *nh_group = fib_entry->nh_group; 3692 3693 switch (fib_entry->fib_node->fib->proto) { 3694 case MLXSW_SP_L3_PROTO_IPV4: 3695 if (!mlxsw_sp_fib4_entry_should_offload(fib_entry)) 3696 return false; 3697 break; 3698 case MLXSW_SP_L3_PROTO_IPV6: 3699 break; 3700 } 3701 3702 switch (fib_entry->type) { 3703 case MLXSW_SP_FIB_ENTRY_TYPE_REMOTE: 3704 return !!nh_group->adj_index_valid; 3705 case MLXSW_SP_FIB_ENTRY_TYPE_LOCAL: 3706 return !!nh_group->nh_rif; 3707 case MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP: 3708 return true; 3709 default: 3710 return false; 3711 } 3712 } 3713 3714 static struct mlxsw_sp_nexthop * 3715 mlxsw_sp_rt6_nexthop(struct mlxsw_sp_nexthop_group *nh_grp, 3716 const struct mlxsw_sp_rt6 *mlxsw_sp_rt6) 3717 { 3718 int i; 3719 3720 for (i = 0; i < nh_grp->count; i++) { 3721 struct mlxsw_sp_nexthop *nh = &nh_grp->nexthops[i]; 3722 struct rt6_info *rt = mlxsw_sp_rt6->rt; 3723 3724 if (nh->rif && nh->rif->dev == rt->dst.dev && 3725 ipv6_addr_equal((const struct in6_addr *) &nh->gw_addr, 3726 &rt->rt6i_gateway)) 3727 return nh; 3728 continue; 3729 } 3730 3731 return NULL; 3732 } 3733 3734 static void 3735 mlxsw_sp_fib4_entry_offload_set(struct mlxsw_sp_fib_entry *fib_entry) 3736 { 3737 struct mlxsw_sp_nexthop_group *nh_grp = fib_entry->nh_group; 3738 int i; 3739 3740 if (fib_entry->type == MLXSW_SP_FIB_ENTRY_TYPE_LOCAL || 3741 fib_entry->type == MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP) { 3742 nh_grp->nexthops->key.fib_nh->nh_flags |= RTNH_F_OFFLOAD; 3743 return; 3744 } 3745 3746 for (i = 0; i < nh_grp->count; i++) { 3747 struct mlxsw_sp_nexthop *nh = &nh_grp->nexthops[i]; 3748 3749 if (nh->offloaded) 3750 nh->key.fib_nh->nh_flags |= RTNH_F_OFFLOAD; 3751 else 3752 nh->key.fib_nh->nh_flags &= ~RTNH_F_OFFLOAD; 3753 } 3754 } 3755 3756 static void 3757 mlxsw_sp_fib4_entry_offload_unset(struct mlxsw_sp_fib_entry *fib_entry) 3758 { 3759 struct mlxsw_sp_nexthop_group *nh_grp = fib_entry->nh_group; 3760 int i; 3761 3762 for (i = 0; i < nh_grp->count; i++) { 3763 struct mlxsw_sp_nexthop *nh = &nh_grp->nexthops[i]; 3764 3765 nh->key.fib_nh->nh_flags &= ~RTNH_F_OFFLOAD; 3766 } 3767 } 3768 3769 static void 3770 mlxsw_sp_fib6_entry_offload_set(struct mlxsw_sp_fib_entry *fib_entry) 3771 { 3772 struct mlxsw_sp_fib6_entry *fib6_entry; 3773 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 3774 3775 fib6_entry = container_of(fib_entry, struct mlxsw_sp_fib6_entry, 3776 common); 3777 3778 if (fib_entry->type == MLXSW_SP_FIB_ENTRY_TYPE_LOCAL) { 3779 list_first_entry(&fib6_entry->rt6_list, struct mlxsw_sp_rt6, 3780 list)->rt->rt6i_nh_flags |= RTNH_F_OFFLOAD; 3781 return; 3782 } 3783 3784 list_for_each_entry(mlxsw_sp_rt6, &fib6_entry->rt6_list, list) { 3785 struct mlxsw_sp_nexthop_group *nh_grp = fib_entry->nh_group; 3786 struct mlxsw_sp_nexthop *nh; 3787 3788 nh = mlxsw_sp_rt6_nexthop(nh_grp, mlxsw_sp_rt6); 3789 if (nh && nh->offloaded) 3790 mlxsw_sp_rt6->rt->rt6i_nh_flags |= RTNH_F_OFFLOAD; 3791 else 3792 mlxsw_sp_rt6->rt->rt6i_nh_flags &= ~RTNH_F_OFFLOAD; 3793 } 3794 } 3795 3796 static void 3797 mlxsw_sp_fib6_entry_offload_unset(struct mlxsw_sp_fib_entry *fib_entry) 3798 { 3799 struct mlxsw_sp_fib6_entry *fib6_entry; 3800 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 3801 3802 fib6_entry = container_of(fib_entry, struct mlxsw_sp_fib6_entry, 3803 common); 3804 list_for_each_entry(mlxsw_sp_rt6, &fib6_entry->rt6_list, list) { 3805 struct rt6_info *rt = mlxsw_sp_rt6->rt; 3806 3807 rt->rt6i_nh_flags &= ~RTNH_F_OFFLOAD; 3808 } 3809 } 3810 3811 static void mlxsw_sp_fib_entry_offload_set(struct mlxsw_sp_fib_entry *fib_entry) 3812 { 3813 switch (fib_entry->fib_node->fib->proto) { 3814 case MLXSW_SP_L3_PROTO_IPV4: 3815 mlxsw_sp_fib4_entry_offload_set(fib_entry); 3816 break; 3817 case MLXSW_SP_L3_PROTO_IPV6: 3818 mlxsw_sp_fib6_entry_offload_set(fib_entry); 3819 break; 3820 } 3821 } 3822 3823 static void 3824 mlxsw_sp_fib_entry_offload_unset(struct mlxsw_sp_fib_entry *fib_entry) 3825 { 3826 switch (fib_entry->fib_node->fib->proto) { 3827 case MLXSW_SP_L3_PROTO_IPV4: 3828 mlxsw_sp_fib4_entry_offload_unset(fib_entry); 3829 break; 3830 case MLXSW_SP_L3_PROTO_IPV6: 3831 mlxsw_sp_fib6_entry_offload_unset(fib_entry); 3832 break; 3833 } 3834 } 3835 3836 static void 3837 mlxsw_sp_fib_entry_offload_refresh(struct mlxsw_sp_fib_entry *fib_entry, 3838 enum mlxsw_reg_ralue_op op, int err) 3839 { 3840 switch (op) { 3841 case MLXSW_REG_RALUE_OP_WRITE_DELETE: 3842 return mlxsw_sp_fib_entry_offload_unset(fib_entry); 3843 case MLXSW_REG_RALUE_OP_WRITE_WRITE: 3844 if (err) 3845 return; 3846 if (mlxsw_sp_fib_entry_should_offload(fib_entry)) 3847 mlxsw_sp_fib_entry_offload_set(fib_entry); 3848 else 3849 mlxsw_sp_fib_entry_offload_unset(fib_entry); 3850 return; 3851 default: 3852 return; 3853 } 3854 } 3855 3856 static void 3857 mlxsw_sp_fib_entry_ralue_pack(char *ralue_pl, 3858 const struct mlxsw_sp_fib_entry *fib_entry, 3859 enum mlxsw_reg_ralue_op op) 3860 { 3861 struct mlxsw_sp_fib *fib = fib_entry->fib_node->fib; 3862 enum mlxsw_reg_ralxx_protocol proto; 3863 u32 *p_dip; 3864 3865 proto = (enum mlxsw_reg_ralxx_protocol) fib->proto; 3866 3867 switch (fib->proto) { 3868 case MLXSW_SP_L3_PROTO_IPV4: 3869 p_dip = (u32 *) fib_entry->fib_node->key.addr; 3870 mlxsw_reg_ralue_pack4(ralue_pl, proto, op, fib->vr->id, 3871 fib_entry->fib_node->key.prefix_len, 3872 *p_dip); 3873 break; 3874 case MLXSW_SP_L3_PROTO_IPV6: 3875 mlxsw_reg_ralue_pack6(ralue_pl, proto, op, fib->vr->id, 3876 fib_entry->fib_node->key.prefix_len, 3877 fib_entry->fib_node->key.addr); 3878 break; 3879 } 3880 } 3881 3882 static int mlxsw_sp_fib_entry_op_remote(struct mlxsw_sp *mlxsw_sp, 3883 struct mlxsw_sp_fib_entry *fib_entry, 3884 enum mlxsw_reg_ralue_op op) 3885 { 3886 char ralue_pl[MLXSW_REG_RALUE_LEN]; 3887 enum mlxsw_reg_ralue_trap_action trap_action; 3888 u16 trap_id = 0; 3889 u32 adjacency_index = 0; 3890 u16 ecmp_size = 0; 3891 3892 /* In case the nexthop group adjacency index is valid, use it 3893 * with provided ECMP size. Otherwise, setup trap and pass 3894 * traffic to kernel. 3895 */ 3896 if (mlxsw_sp_fib_entry_should_offload(fib_entry)) { 3897 trap_action = MLXSW_REG_RALUE_TRAP_ACTION_NOP; 3898 adjacency_index = fib_entry->nh_group->adj_index; 3899 ecmp_size = fib_entry->nh_group->ecmp_size; 3900 } else { 3901 trap_action = MLXSW_REG_RALUE_TRAP_ACTION_TRAP; 3902 trap_id = MLXSW_TRAP_ID_RTR_INGRESS0; 3903 } 3904 3905 mlxsw_sp_fib_entry_ralue_pack(ralue_pl, fib_entry, op); 3906 mlxsw_reg_ralue_act_remote_pack(ralue_pl, trap_action, trap_id, 3907 adjacency_index, ecmp_size); 3908 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), ralue_pl); 3909 } 3910 3911 static int mlxsw_sp_fib_entry_op_local(struct mlxsw_sp *mlxsw_sp, 3912 struct mlxsw_sp_fib_entry *fib_entry, 3913 enum mlxsw_reg_ralue_op op) 3914 { 3915 struct mlxsw_sp_rif *rif = fib_entry->nh_group->nh_rif; 3916 enum mlxsw_reg_ralue_trap_action trap_action; 3917 char ralue_pl[MLXSW_REG_RALUE_LEN]; 3918 u16 trap_id = 0; 3919 u16 rif_index = 0; 3920 3921 if (mlxsw_sp_fib_entry_should_offload(fib_entry)) { 3922 trap_action = MLXSW_REG_RALUE_TRAP_ACTION_NOP; 3923 rif_index = rif->rif_index; 3924 } else { 3925 trap_action = MLXSW_REG_RALUE_TRAP_ACTION_TRAP; 3926 trap_id = MLXSW_TRAP_ID_RTR_INGRESS0; 3927 } 3928 3929 mlxsw_sp_fib_entry_ralue_pack(ralue_pl, fib_entry, op); 3930 mlxsw_reg_ralue_act_local_pack(ralue_pl, trap_action, trap_id, 3931 rif_index); 3932 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), ralue_pl); 3933 } 3934 3935 static int mlxsw_sp_fib_entry_op_trap(struct mlxsw_sp *mlxsw_sp, 3936 struct mlxsw_sp_fib_entry *fib_entry, 3937 enum mlxsw_reg_ralue_op op) 3938 { 3939 char ralue_pl[MLXSW_REG_RALUE_LEN]; 3940 3941 mlxsw_sp_fib_entry_ralue_pack(ralue_pl, fib_entry, op); 3942 mlxsw_reg_ralue_act_ip2me_pack(ralue_pl); 3943 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), ralue_pl); 3944 } 3945 3946 static int 3947 mlxsw_sp_fib_entry_op_ipip_decap(struct mlxsw_sp *mlxsw_sp, 3948 struct mlxsw_sp_fib_entry *fib_entry, 3949 enum mlxsw_reg_ralue_op op) 3950 { 3951 struct mlxsw_sp_ipip_entry *ipip_entry = fib_entry->decap.ipip_entry; 3952 const struct mlxsw_sp_ipip_ops *ipip_ops; 3953 3954 if (WARN_ON(!ipip_entry)) 3955 return -EINVAL; 3956 3957 ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt]; 3958 return ipip_ops->fib_entry_op(mlxsw_sp, ipip_entry, op, 3959 fib_entry->decap.tunnel_index); 3960 } 3961 3962 static int __mlxsw_sp_fib_entry_op(struct mlxsw_sp *mlxsw_sp, 3963 struct mlxsw_sp_fib_entry *fib_entry, 3964 enum mlxsw_reg_ralue_op op) 3965 { 3966 switch (fib_entry->type) { 3967 case MLXSW_SP_FIB_ENTRY_TYPE_REMOTE: 3968 return mlxsw_sp_fib_entry_op_remote(mlxsw_sp, fib_entry, op); 3969 case MLXSW_SP_FIB_ENTRY_TYPE_LOCAL: 3970 return mlxsw_sp_fib_entry_op_local(mlxsw_sp, fib_entry, op); 3971 case MLXSW_SP_FIB_ENTRY_TYPE_TRAP: 3972 return mlxsw_sp_fib_entry_op_trap(mlxsw_sp, fib_entry, op); 3973 case MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP: 3974 return mlxsw_sp_fib_entry_op_ipip_decap(mlxsw_sp, 3975 fib_entry, op); 3976 } 3977 return -EINVAL; 3978 } 3979 3980 static int mlxsw_sp_fib_entry_op(struct mlxsw_sp *mlxsw_sp, 3981 struct mlxsw_sp_fib_entry *fib_entry, 3982 enum mlxsw_reg_ralue_op op) 3983 { 3984 int err = __mlxsw_sp_fib_entry_op(mlxsw_sp, fib_entry, op); 3985 3986 mlxsw_sp_fib_entry_offload_refresh(fib_entry, op, err); 3987 3988 return err; 3989 } 3990 3991 static int mlxsw_sp_fib_entry_update(struct mlxsw_sp *mlxsw_sp, 3992 struct mlxsw_sp_fib_entry *fib_entry) 3993 { 3994 return mlxsw_sp_fib_entry_op(mlxsw_sp, fib_entry, 3995 MLXSW_REG_RALUE_OP_WRITE_WRITE); 3996 } 3997 3998 static int mlxsw_sp_fib_entry_del(struct mlxsw_sp *mlxsw_sp, 3999 struct mlxsw_sp_fib_entry *fib_entry) 4000 { 4001 return mlxsw_sp_fib_entry_op(mlxsw_sp, fib_entry, 4002 MLXSW_REG_RALUE_OP_WRITE_DELETE); 4003 } 4004 4005 static int 4006 mlxsw_sp_fib4_entry_type_set(struct mlxsw_sp *mlxsw_sp, 4007 const struct fib_entry_notifier_info *fen_info, 4008 struct mlxsw_sp_fib_entry *fib_entry) 4009 { 4010 union mlxsw_sp_l3addr dip = { .addr4 = htonl(fen_info->dst) }; 4011 struct net_device *dev = fen_info->fi->fib_dev; 4012 struct mlxsw_sp_ipip_entry *ipip_entry; 4013 struct fib_info *fi = fen_info->fi; 4014 4015 switch (fen_info->type) { 4016 case RTN_LOCAL: 4017 ipip_entry = mlxsw_sp_ipip_entry_find_by_decap(mlxsw_sp, dev, 4018 MLXSW_SP_L3_PROTO_IPV4, dip); 4019 if (ipip_entry && ipip_entry->ol_dev->flags & IFF_UP) { 4020 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP; 4021 return mlxsw_sp_fib_entry_decap_init(mlxsw_sp, 4022 fib_entry, 4023 ipip_entry); 4024 } 4025 /* fall through */ 4026 case RTN_BROADCAST: 4027 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP; 4028 return 0; 4029 case RTN_UNREACHABLE: /* fall through */ 4030 case RTN_BLACKHOLE: /* fall through */ 4031 case RTN_PROHIBIT: 4032 /* Packets hitting these routes need to be trapped, but 4033 * can do so with a lower priority than packets directed 4034 * at the host, so use action type local instead of trap. 4035 */ 4036 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_LOCAL; 4037 return 0; 4038 case RTN_UNICAST: 4039 if (mlxsw_sp_fi_is_gateway(mlxsw_sp, fi)) 4040 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_REMOTE; 4041 else 4042 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_LOCAL; 4043 return 0; 4044 default: 4045 return -EINVAL; 4046 } 4047 } 4048 4049 static struct mlxsw_sp_fib4_entry * 4050 mlxsw_sp_fib4_entry_create(struct mlxsw_sp *mlxsw_sp, 4051 struct mlxsw_sp_fib_node *fib_node, 4052 const struct fib_entry_notifier_info *fen_info) 4053 { 4054 struct mlxsw_sp_fib4_entry *fib4_entry; 4055 struct mlxsw_sp_fib_entry *fib_entry; 4056 int err; 4057 4058 fib4_entry = kzalloc(sizeof(*fib4_entry), GFP_KERNEL); 4059 if (!fib4_entry) 4060 return ERR_PTR(-ENOMEM); 4061 fib_entry = &fib4_entry->common; 4062 4063 err = mlxsw_sp_fib4_entry_type_set(mlxsw_sp, fen_info, fib_entry); 4064 if (err) 4065 goto err_fib4_entry_type_set; 4066 4067 err = mlxsw_sp_nexthop4_group_get(mlxsw_sp, fib_entry, fen_info->fi); 4068 if (err) 4069 goto err_nexthop4_group_get; 4070 4071 fib4_entry->prio = fen_info->fi->fib_priority; 4072 fib4_entry->tb_id = fen_info->tb_id; 4073 fib4_entry->type = fen_info->type; 4074 fib4_entry->tos = fen_info->tos; 4075 4076 fib_entry->fib_node = fib_node; 4077 4078 return fib4_entry; 4079 4080 err_nexthop4_group_get: 4081 err_fib4_entry_type_set: 4082 kfree(fib4_entry); 4083 return ERR_PTR(err); 4084 } 4085 4086 static void mlxsw_sp_fib4_entry_destroy(struct mlxsw_sp *mlxsw_sp, 4087 struct mlxsw_sp_fib4_entry *fib4_entry) 4088 { 4089 mlxsw_sp_nexthop4_group_put(mlxsw_sp, &fib4_entry->common); 4090 kfree(fib4_entry); 4091 } 4092 4093 static struct mlxsw_sp_fib4_entry * 4094 mlxsw_sp_fib4_entry_lookup(struct mlxsw_sp *mlxsw_sp, 4095 const struct fib_entry_notifier_info *fen_info) 4096 { 4097 struct mlxsw_sp_fib4_entry *fib4_entry; 4098 struct mlxsw_sp_fib_node *fib_node; 4099 struct mlxsw_sp_fib *fib; 4100 struct mlxsw_sp_vr *vr; 4101 4102 vr = mlxsw_sp_vr_find(mlxsw_sp, fen_info->tb_id); 4103 if (!vr) 4104 return NULL; 4105 fib = mlxsw_sp_vr_fib(vr, MLXSW_SP_L3_PROTO_IPV4); 4106 4107 fib_node = mlxsw_sp_fib_node_lookup(fib, &fen_info->dst, 4108 sizeof(fen_info->dst), 4109 fen_info->dst_len); 4110 if (!fib_node) 4111 return NULL; 4112 4113 list_for_each_entry(fib4_entry, &fib_node->entry_list, common.list) { 4114 if (fib4_entry->tb_id == fen_info->tb_id && 4115 fib4_entry->tos == fen_info->tos && 4116 fib4_entry->type == fen_info->type && 4117 mlxsw_sp_nexthop4_group_fi(fib4_entry->common.nh_group) == 4118 fen_info->fi) { 4119 return fib4_entry; 4120 } 4121 } 4122 4123 return NULL; 4124 } 4125 4126 static const struct rhashtable_params mlxsw_sp_fib_ht_params = { 4127 .key_offset = offsetof(struct mlxsw_sp_fib_node, key), 4128 .head_offset = offsetof(struct mlxsw_sp_fib_node, ht_node), 4129 .key_len = sizeof(struct mlxsw_sp_fib_key), 4130 .automatic_shrinking = true, 4131 }; 4132 4133 static int mlxsw_sp_fib_node_insert(struct mlxsw_sp_fib *fib, 4134 struct mlxsw_sp_fib_node *fib_node) 4135 { 4136 return rhashtable_insert_fast(&fib->ht, &fib_node->ht_node, 4137 mlxsw_sp_fib_ht_params); 4138 } 4139 4140 static void mlxsw_sp_fib_node_remove(struct mlxsw_sp_fib *fib, 4141 struct mlxsw_sp_fib_node *fib_node) 4142 { 4143 rhashtable_remove_fast(&fib->ht, &fib_node->ht_node, 4144 mlxsw_sp_fib_ht_params); 4145 } 4146 4147 static struct mlxsw_sp_fib_node * 4148 mlxsw_sp_fib_node_lookup(struct mlxsw_sp_fib *fib, const void *addr, 4149 size_t addr_len, unsigned char prefix_len) 4150 { 4151 struct mlxsw_sp_fib_key key; 4152 4153 memset(&key, 0, sizeof(key)); 4154 memcpy(key.addr, addr, addr_len); 4155 key.prefix_len = prefix_len; 4156 return rhashtable_lookup_fast(&fib->ht, &key, mlxsw_sp_fib_ht_params); 4157 } 4158 4159 static struct mlxsw_sp_fib_node * 4160 mlxsw_sp_fib_node_create(struct mlxsw_sp_fib *fib, const void *addr, 4161 size_t addr_len, unsigned char prefix_len) 4162 { 4163 struct mlxsw_sp_fib_node *fib_node; 4164 4165 fib_node = kzalloc(sizeof(*fib_node), GFP_KERNEL); 4166 if (!fib_node) 4167 return NULL; 4168 4169 INIT_LIST_HEAD(&fib_node->entry_list); 4170 list_add(&fib_node->list, &fib->node_list); 4171 memcpy(fib_node->key.addr, addr, addr_len); 4172 fib_node->key.prefix_len = prefix_len; 4173 4174 return fib_node; 4175 } 4176 4177 static void mlxsw_sp_fib_node_destroy(struct mlxsw_sp_fib_node *fib_node) 4178 { 4179 list_del(&fib_node->list); 4180 WARN_ON(!list_empty(&fib_node->entry_list)); 4181 kfree(fib_node); 4182 } 4183 4184 static bool 4185 mlxsw_sp_fib_node_entry_is_first(const struct mlxsw_sp_fib_node *fib_node, 4186 const struct mlxsw_sp_fib_entry *fib_entry) 4187 { 4188 return list_first_entry(&fib_node->entry_list, 4189 struct mlxsw_sp_fib_entry, list) == fib_entry; 4190 } 4191 4192 static int mlxsw_sp_fib_lpm_tree_link(struct mlxsw_sp *mlxsw_sp, 4193 struct mlxsw_sp_fib *fib, 4194 struct mlxsw_sp_fib_node *fib_node) 4195 { 4196 struct mlxsw_sp_prefix_usage req_prefix_usage = {{ 0 } }; 4197 struct mlxsw_sp_lpm_tree *lpm_tree; 4198 int err; 4199 4200 /* Since the tree is shared between all virtual routers we must 4201 * make sure it contains all the required prefix lengths. This 4202 * can be computed by either adding the new prefix length to the 4203 * existing prefix usage of a bound tree, or by aggregating the 4204 * prefix lengths across all virtual routers and adding the new 4205 * one as well. 4206 */ 4207 if (fib->lpm_tree) 4208 mlxsw_sp_prefix_usage_cpy(&req_prefix_usage, 4209 &fib->lpm_tree->prefix_usage); 4210 else 4211 mlxsw_sp_vrs_prefixes(mlxsw_sp, fib->proto, &req_prefix_usage); 4212 mlxsw_sp_prefix_usage_set(&req_prefix_usage, fib_node->key.prefix_len); 4213 4214 lpm_tree = mlxsw_sp_lpm_tree_get(mlxsw_sp, &req_prefix_usage, 4215 fib->proto); 4216 if (IS_ERR(lpm_tree)) 4217 return PTR_ERR(lpm_tree); 4218 4219 if (fib->lpm_tree && fib->lpm_tree->id == lpm_tree->id) 4220 return 0; 4221 4222 err = mlxsw_sp_vrs_lpm_tree_replace(mlxsw_sp, fib, lpm_tree); 4223 if (err) 4224 return err; 4225 4226 return 0; 4227 } 4228 4229 static void mlxsw_sp_fib_lpm_tree_unlink(struct mlxsw_sp *mlxsw_sp, 4230 struct mlxsw_sp_fib *fib) 4231 { 4232 if (!mlxsw_sp_prefix_usage_none(&fib->prefix_usage)) 4233 return; 4234 mlxsw_sp_vr_lpm_tree_unbind(mlxsw_sp, fib); 4235 mlxsw_sp_lpm_tree_put(mlxsw_sp, fib->lpm_tree); 4236 fib->lpm_tree = NULL; 4237 } 4238 4239 static void mlxsw_sp_fib_node_prefix_inc(struct mlxsw_sp_fib_node *fib_node) 4240 { 4241 unsigned char prefix_len = fib_node->key.prefix_len; 4242 struct mlxsw_sp_fib *fib = fib_node->fib; 4243 4244 if (fib->prefix_ref_count[prefix_len]++ == 0) 4245 mlxsw_sp_prefix_usage_set(&fib->prefix_usage, prefix_len); 4246 } 4247 4248 static void mlxsw_sp_fib_node_prefix_dec(struct mlxsw_sp_fib_node *fib_node) 4249 { 4250 unsigned char prefix_len = fib_node->key.prefix_len; 4251 struct mlxsw_sp_fib *fib = fib_node->fib; 4252 4253 if (--fib->prefix_ref_count[prefix_len] == 0) 4254 mlxsw_sp_prefix_usage_clear(&fib->prefix_usage, prefix_len); 4255 } 4256 4257 static int mlxsw_sp_fib_node_init(struct mlxsw_sp *mlxsw_sp, 4258 struct mlxsw_sp_fib_node *fib_node, 4259 struct mlxsw_sp_fib *fib) 4260 { 4261 int err; 4262 4263 err = mlxsw_sp_fib_node_insert(fib, fib_node); 4264 if (err) 4265 return err; 4266 fib_node->fib = fib; 4267 4268 err = mlxsw_sp_fib_lpm_tree_link(mlxsw_sp, fib, fib_node); 4269 if (err) 4270 goto err_fib_lpm_tree_link; 4271 4272 mlxsw_sp_fib_node_prefix_inc(fib_node); 4273 4274 return 0; 4275 4276 err_fib_lpm_tree_link: 4277 fib_node->fib = NULL; 4278 mlxsw_sp_fib_node_remove(fib, fib_node); 4279 return err; 4280 } 4281 4282 static void mlxsw_sp_fib_node_fini(struct mlxsw_sp *mlxsw_sp, 4283 struct mlxsw_sp_fib_node *fib_node) 4284 { 4285 struct mlxsw_sp_fib *fib = fib_node->fib; 4286 4287 mlxsw_sp_fib_node_prefix_dec(fib_node); 4288 mlxsw_sp_fib_lpm_tree_unlink(mlxsw_sp, fib); 4289 fib_node->fib = NULL; 4290 mlxsw_sp_fib_node_remove(fib, fib_node); 4291 } 4292 4293 static struct mlxsw_sp_fib_node * 4294 mlxsw_sp_fib_node_get(struct mlxsw_sp *mlxsw_sp, u32 tb_id, const void *addr, 4295 size_t addr_len, unsigned char prefix_len, 4296 enum mlxsw_sp_l3proto proto) 4297 { 4298 struct mlxsw_sp_fib_node *fib_node; 4299 struct mlxsw_sp_fib *fib; 4300 struct mlxsw_sp_vr *vr; 4301 int err; 4302 4303 vr = mlxsw_sp_vr_get(mlxsw_sp, tb_id, NULL); 4304 if (IS_ERR(vr)) 4305 return ERR_CAST(vr); 4306 fib = mlxsw_sp_vr_fib(vr, proto); 4307 4308 fib_node = mlxsw_sp_fib_node_lookup(fib, addr, addr_len, prefix_len); 4309 if (fib_node) 4310 return fib_node; 4311 4312 fib_node = mlxsw_sp_fib_node_create(fib, addr, addr_len, prefix_len); 4313 if (!fib_node) { 4314 err = -ENOMEM; 4315 goto err_fib_node_create; 4316 } 4317 4318 err = mlxsw_sp_fib_node_init(mlxsw_sp, fib_node, fib); 4319 if (err) 4320 goto err_fib_node_init; 4321 4322 return fib_node; 4323 4324 err_fib_node_init: 4325 mlxsw_sp_fib_node_destroy(fib_node); 4326 err_fib_node_create: 4327 mlxsw_sp_vr_put(vr); 4328 return ERR_PTR(err); 4329 } 4330 4331 static void mlxsw_sp_fib_node_put(struct mlxsw_sp *mlxsw_sp, 4332 struct mlxsw_sp_fib_node *fib_node) 4333 { 4334 struct mlxsw_sp_vr *vr = fib_node->fib->vr; 4335 4336 if (!list_empty(&fib_node->entry_list)) 4337 return; 4338 mlxsw_sp_fib_node_fini(mlxsw_sp, fib_node); 4339 mlxsw_sp_fib_node_destroy(fib_node); 4340 mlxsw_sp_vr_put(vr); 4341 } 4342 4343 static struct mlxsw_sp_fib4_entry * 4344 mlxsw_sp_fib4_node_entry_find(const struct mlxsw_sp_fib_node *fib_node, 4345 const struct mlxsw_sp_fib4_entry *new4_entry) 4346 { 4347 struct mlxsw_sp_fib4_entry *fib4_entry; 4348 4349 list_for_each_entry(fib4_entry, &fib_node->entry_list, common.list) { 4350 if (fib4_entry->tb_id > new4_entry->tb_id) 4351 continue; 4352 if (fib4_entry->tb_id != new4_entry->tb_id) 4353 break; 4354 if (fib4_entry->tos > new4_entry->tos) 4355 continue; 4356 if (fib4_entry->prio >= new4_entry->prio || 4357 fib4_entry->tos < new4_entry->tos) 4358 return fib4_entry; 4359 } 4360 4361 return NULL; 4362 } 4363 4364 static int 4365 mlxsw_sp_fib4_node_list_append(struct mlxsw_sp_fib4_entry *fib4_entry, 4366 struct mlxsw_sp_fib4_entry *new4_entry) 4367 { 4368 struct mlxsw_sp_fib_node *fib_node; 4369 4370 if (WARN_ON(!fib4_entry)) 4371 return -EINVAL; 4372 4373 fib_node = fib4_entry->common.fib_node; 4374 list_for_each_entry_from(fib4_entry, &fib_node->entry_list, 4375 common.list) { 4376 if (fib4_entry->tb_id != new4_entry->tb_id || 4377 fib4_entry->tos != new4_entry->tos || 4378 fib4_entry->prio != new4_entry->prio) 4379 break; 4380 } 4381 4382 list_add_tail(&new4_entry->common.list, &fib4_entry->common.list); 4383 return 0; 4384 } 4385 4386 static int 4387 mlxsw_sp_fib4_node_list_insert(struct mlxsw_sp_fib4_entry *new4_entry, 4388 bool replace, bool append) 4389 { 4390 struct mlxsw_sp_fib_node *fib_node = new4_entry->common.fib_node; 4391 struct mlxsw_sp_fib4_entry *fib4_entry; 4392 4393 fib4_entry = mlxsw_sp_fib4_node_entry_find(fib_node, new4_entry); 4394 4395 if (append) 4396 return mlxsw_sp_fib4_node_list_append(fib4_entry, new4_entry); 4397 if (replace && WARN_ON(!fib4_entry)) 4398 return -EINVAL; 4399 4400 /* Insert new entry before replaced one, so that we can later 4401 * remove the second. 4402 */ 4403 if (fib4_entry) { 4404 list_add_tail(&new4_entry->common.list, 4405 &fib4_entry->common.list); 4406 } else { 4407 struct mlxsw_sp_fib4_entry *last; 4408 4409 list_for_each_entry(last, &fib_node->entry_list, common.list) { 4410 if (new4_entry->tb_id > last->tb_id) 4411 break; 4412 fib4_entry = last; 4413 } 4414 4415 if (fib4_entry) 4416 list_add(&new4_entry->common.list, 4417 &fib4_entry->common.list); 4418 else 4419 list_add(&new4_entry->common.list, 4420 &fib_node->entry_list); 4421 } 4422 4423 return 0; 4424 } 4425 4426 static void 4427 mlxsw_sp_fib4_node_list_remove(struct mlxsw_sp_fib4_entry *fib4_entry) 4428 { 4429 list_del(&fib4_entry->common.list); 4430 } 4431 4432 static int mlxsw_sp_fib_node_entry_add(struct mlxsw_sp *mlxsw_sp, 4433 struct mlxsw_sp_fib_entry *fib_entry) 4434 { 4435 struct mlxsw_sp_fib_node *fib_node = fib_entry->fib_node; 4436 4437 if (!mlxsw_sp_fib_node_entry_is_first(fib_node, fib_entry)) 4438 return 0; 4439 4440 /* To prevent packet loss, overwrite the previously offloaded 4441 * entry. 4442 */ 4443 if (!list_is_singular(&fib_node->entry_list)) { 4444 enum mlxsw_reg_ralue_op op = MLXSW_REG_RALUE_OP_WRITE_DELETE; 4445 struct mlxsw_sp_fib_entry *n = list_next_entry(fib_entry, list); 4446 4447 mlxsw_sp_fib_entry_offload_refresh(n, op, 0); 4448 } 4449 4450 return mlxsw_sp_fib_entry_update(mlxsw_sp, fib_entry); 4451 } 4452 4453 static void mlxsw_sp_fib_node_entry_del(struct mlxsw_sp *mlxsw_sp, 4454 struct mlxsw_sp_fib_entry *fib_entry) 4455 { 4456 struct mlxsw_sp_fib_node *fib_node = fib_entry->fib_node; 4457 4458 if (!mlxsw_sp_fib_node_entry_is_first(fib_node, fib_entry)) 4459 return; 4460 4461 /* Promote the next entry by overwriting the deleted entry */ 4462 if (!list_is_singular(&fib_node->entry_list)) { 4463 struct mlxsw_sp_fib_entry *n = list_next_entry(fib_entry, list); 4464 enum mlxsw_reg_ralue_op op = MLXSW_REG_RALUE_OP_WRITE_DELETE; 4465 4466 mlxsw_sp_fib_entry_update(mlxsw_sp, n); 4467 mlxsw_sp_fib_entry_offload_refresh(fib_entry, op, 0); 4468 return; 4469 } 4470 4471 mlxsw_sp_fib_entry_del(mlxsw_sp, fib_entry); 4472 } 4473 4474 static int mlxsw_sp_fib4_node_entry_link(struct mlxsw_sp *mlxsw_sp, 4475 struct mlxsw_sp_fib4_entry *fib4_entry, 4476 bool replace, bool append) 4477 { 4478 int err; 4479 4480 err = mlxsw_sp_fib4_node_list_insert(fib4_entry, replace, append); 4481 if (err) 4482 return err; 4483 4484 err = mlxsw_sp_fib_node_entry_add(mlxsw_sp, &fib4_entry->common); 4485 if (err) 4486 goto err_fib_node_entry_add; 4487 4488 return 0; 4489 4490 err_fib_node_entry_add: 4491 mlxsw_sp_fib4_node_list_remove(fib4_entry); 4492 return err; 4493 } 4494 4495 static void 4496 mlxsw_sp_fib4_node_entry_unlink(struct mlxsw_sp *mlxsw_sp, 4497 struct mlxsw_sp_fib4_entry *fib4_entry) 4498 { 4499 mlxsw_sp_fib_node_entry_del(mlxsw_sp, &fib4_entry->common); 4500 mlxsw_sp_fib4_node_list_remove(fib4_entry); 4501 4502 if (fib4_entry->common.type == MLXSW_SP_FIB_ENTRY_TYPE_IPIP_DECAP) 4503 mlxsw_sp_fib_entry_decap_fini(mlxsw_sp, &fib4_entry->common); 4504 } 4505 4506 static void mlxsw_sp_fib4_entry_replace(struct mlxsw_sp *mlxsw_sp, 4507 struct mlxsw_sp_fib4_entry *fib4_entry, 4508 bool replace) 4509 { 4510 struct mlxsw_sp_fib_node *fib_node = fib4_entry->common.fib_node; 4511 struct mlxsw_sp_fib4_entry *replaced; 4512 4513 if (!replace) 4514 return; 4515 4516 /* We inserted the new entry before replaced one */ 4517 replaced = list_next_entry(fib4_entry, common.list); 4518 4519 mlxsw_sp_fib4_node_entry_unlink(mlxsw_sp, replaced); 4520 mlxsw_sp_fib4_entry_destroy(mlxsw_sp, replaced); 4521 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 4522 } 4523 4524 static int 4525 mlxsw_sp_router_fib4_add(struct mlxsw_sp *mlxsw_sp, 4526 const struct fib_entry_notifier_info *fen_info, 4527 bool replace, bool append) 4528 { 4529 struct mlxsw_sp_fib4_entry *fib4_entry; 4530 struct mlxsw_sp_fib_node *fib_node; 4531 int err; 4532 4533 if (mlxsw_sp->router->aborted) 4534 return 0; 4535 4536 fib_node = mlxsw_sp_fib_node_get(mlxsw_sp, fen_info->tb_id, 4537 &fen_info->dst, sizeof(fen_info->dst), 4538 fen_info->dst_len, 4539 MLXSW_SP_L3_PROTO_IPV4); 4540 if (IS_ERR(fib_node)) { 4541 dev_warn(mlxsw_sp->bus_info->dev, "Failed to get FIB node\n"); 4542 return PTR_ERR(fib_node); 4543 } 4544 4545 fib4_entry = mlxsw_sp_fib4_entry_create(mlxsw_sp, fib_node, fen_info); 4546 if (IS_ERR(fib4_entry)) { 4547 dev_warn(mlxsw_sp->bus_info->dev, "Failed to create FIB entry\n"); 4548 err = PTR_ERR(fib4_entry); 4549 goto err_fib4_entry_create; 4550 } 4551 4552 err = mlxsw_sp_fib4_node_entry_link(mlxsw_sp, fib4_entry, replace, 4553 append); 4554 if (err) { 4555 dev_warn(mlxsw_sp->bus_info->dev, "Failed to link FIB entry to node\n"); 4556 goto err_fib4_node_entry_link; 4557 } 4558 4559 mlxsw_sp_fib4_entry_replace(mlxsw_sp, fib4_entry, replace); 4560 4561 return 0; 4562 4563 err_fib4_node_entry_link: 4564 mlxsw_sp_fib4_entry_destroy(mlxsw_sp, fib4_entry); 4565 err_fib4_entry_create: 4566 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 4567 return err; 4568 } 4569 4570 static void mlxsw_sp_router_fib4_del(struct mlxsw_sp *mlxsw_sp, 4571 struct fib_entry_notifier_info *fen_info) 4572 { 4573 struct mlxsw_sp_fib4_entry *fib4_entry; 4574 struct mlxsw_sp_fib_node *fib_node; 4575 4576 if (mlxsw_sp->router->aborted) 4577 return; 4578 4579 fib4_entry = mlxsw_sp_fib4_entry_lookup(mlxsw_sp, fen_info); 4580 if (WARN_ON(!fib4_entry)) 4581 return; 4582 fib_node = fib4_entry->common.fib_node; 4583 4584 mlxsw_sp_fib4_node_entry_unlink(mlxsw_sp, fib4_entry); 4585 mlxsw_sp_fib4_entry_destroy(mlxsw_sp, fib4_entry); 4586 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 4587 } 4588 4589 static bool mlxsw_sp_fib6_rt_should_ignore(const struct rt6_info *rt) 4590 { 4591 /* Packets with link-local destination IP arriving to the router 4592 * are trapped to the CPU, so no need to program specific routes 4593 * for them. 4594 */ 4595 if (ipv6_addr_type(&rt->rt6i_dst.addr) & IPV6_ADDR_LINKLOCAL) 4596 return true; 4597 4598 /* Multicast routes aren't supported, so ignore them. Neighbour 4599 * Discovery packets are specifically trapped. 4600 */ 4601 if (ipv6_addr_type(&rt->rt6i_dst.addr) & IPV6_ADDR_MULTICAST) 4602 return true; 4603 4604 /* Cloned routes are irrelevant in the forwarding path. */ 4605 if (rt->rt6i_flags & RTF_CACHE) 4606 return true; 4607 4608 return false; 4609 } 4610 4611 static struct mlxsw_sp_rt6 *mlxsw_sp_rt6_create(struct rt6_info *rt) 4612 { 4613 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 4614 4615 mlxsw_sp_rt6 = kzalloc(sizeof(*mlxsw_sp_rt6), GFP_KERNEL); 4616 if (!mlxsw_sp_rt6) 4617 return ERR_PTR(-ENOMEM); 4618 4619 /* In case of route replace, replaced route is deleted with 4620 * no notification. Take reference to prevent accessing freed 4621 * memory. 4622 */ 4623 mlxsw_sp_rt6->rt = rt; 4624 rt6_hold(rt); 4625 4626 return mlxsw_sp_rt6; 4627 } 4628 4629 #if IS_ENABLED(CONFIG_IPV6) 4630 static void mlxsw_sp_rt6_release(struct rt6_info *rt) 4631 { 4632 rt6_release(rt); 4633 } 4634 #else 4635 static void mlxsw_sp_rt6_release(struct rt6_info *rt) 4636 { 4637 } 4638 #endif 4639 4640 static void mlxsw_sp_rt6_destroy(struct mlxsw_sp_rt6 *mlxsw_sp_rt6) 4641 { 4642 mlxsw_sp_rt6_release(mlxsw_sp_rt6->rt); 4643 kfree(mlxsw_sp_rt6); 4644 } 4645 4646 static bool mlxsw_sp_fib6_rt_can_mp(const struct rt6_info *rt) 4647 { 4648 /* RTF_CACHE routes are ignored */ 4649 return (rt->rt6i_flags & (RTF_GATEWAY | RTF_ADDRCONF)) == RTF_GATEWAY; 4650 } 4651 4652 static struct rt6_info * 4653 mlxsw_sp_fib6_entry_rt(const struct mlxsw_sp_fib6_entry *fib6_entry) 4654 { 4655 return list_first_entry(&fib6_entry->rt6_list, struct mlxsw_sp_rt6, 4656 list)->rt; 4657 } 4658 4659 static struct mlxsw_sp_fib6_entry * 4660 mlxsw_sp_fib6_node_mp_entry_find(const struct mlxsw_sp_fib_node *fib_node, 4661 const struct rt6_info *nrt, bool replace) 4662 { 4663 struct mlxsw_sp_fib6_entry *fib6_entry; 4664 4665 if (!mlxsw_sp_fib6_rt_can_mp(nrt) || replace) 4666 return NULL; 4667 4668 list_for_each_entry(fib6_entry, &fib_node->entry_list, common.list) { 4669 struct rt6_info *rt = mlxsw_sp_fib6_entry_rt(fib6_entry); 4670 4671 /* RT6_TABLE_LOCAL and RT6_TABLE_MAIN share the same 4672 * virtual router. 4673 */ 4674 if (rt->rt6i_table->tb6_id > nrt->rt6i_table->tb6_id) 4675 continue; 4676 if (rt->rt6i_table->tb6_id != nrt->rt6i_table->tb6_id) 4677 break; 4678 if (rt->rt6i_metric < nrt->rt6i_metric) 4679 continue; 4680 if (rt->rt6i_metric == nrt->rt6i_metric && 4681 mlxsw_sp_fib6_rt_can_mp(rt)) 4682 return fib6_entry; 4683 if (rt->rt6i_metric > nrt->rt6i_metric) 4684 break; 4685 } 4686 4687 return NULL; 4688 } 4689 4690 static struct mlxsw_sp_rt6 * 4691 mlxsw_sp_fib6_entry_rt_find(const struct mlxsw_sp_fib6_entry *fib6_entry, 4692 const struct rt6_info *rt) 4693 { 4694 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 4695 4696 list_for_each_entry(mlxsw_sp_rt6, &fib6_entry->rt6_list, list) { 4697 if (mlxsw_sp_rt6->rt == rt) 4698 return mlxsw_sp_rt6; 4699 } 4700 4701 return NULL; 4702 } 4703 4704 static bool mlxsw_sp_nexthop6_ipip_type(const struct mlxsw_sp *mlxsw_sp, 4705 const struct rt6_info *rt, 4706 enum mlxsw_sp_ipip_type *ret) 4707 { 4708 return rt->dst.dev && 4709 mlxsw_sp_netdev_ipip_type(mlxsw_sp, rt->dst.dev, ret); 4710 } 4711 4712 static int mlxsw_sp_nexthop6_type_init(struct mlxsw_sp *mlxsw_sp, 4713 struct mlxsw_sp_nexthop_group *nh_grp, 4714 struct mlxsw_sp_nexthop *nh, 4715 const struct rt6_info *rt) 4716 { 4717 const struct mlxsw_sp_ipip_ops *ipip_ops; 4718 struct mlxsw_sp_ipip_entry *ipip_entry; 4719 struct net_device *dev = rt->dst.dev; 4720 struct mlxsw_sp_rif *rif; 4721 int err; 4722 4723 ipip_entry = mlxsw_sp_ipip_entry_find_by_ol_dev(mlxsw_sp, dev); 4724 if (ipip_entry) { 4725 ipip_ops = mlxsw_sp->router->ipip_ops_arr[ipip_entry->ipipt]; 4726 if (ipip_ops->can_offload(mlxsw_sp, dev, 4727 MLXSW_SP_L3_PROTO_IPV6)) { 4728 nh->type = MLXSW_SP_NEXTHOP_TYPE_IPIP; 4729 mlxsw_sp_nexthop_ipip_init(mlxsw_sp, nh, ipip_entry); 4730 return 0; 4731 } 4732 } 4733 4734 nh->type = MLXSW_SP_NEXTHOP_TYPE_ETH; 4735 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); 4736 if (!rif) 4737 return 0; 4738 mlxsw_sp_nexthop_rif_init(nh, rif); 4739 4740 err = mlxsw_sp_nexthop_neigh_init(mlxsw_sp, nh); 4741 if (err) 4742 goto err_nexthop_neigh_init; 4743 4744 return 0; 4745 4746 err_nexthop_neigh_init: 4747 mlxsw_sp_nexthop_rif_fini(nh); 4748 return err; 4749 } 4750 4751 static void mlxsw_sp_nexthop6_type_fini(struct mlxsw_sp *mlxsw_sp, 4752 struct mlxsw_sp_nexthop *nh) 4753 { 4754 mlxsw_sp_nexthop_type_fini(mlxsw_sp, nh); 4755 } 4756 4757 static int mlxsw_sp_nexthop6_init(struct mlxsw_sp *mlxsw_sp, 4758 struct mlxsw_sp_nexthop_group *nh_grp, 4759 struct mlxsw_sp_nexthop *nh, 4760 const struct rt6_info *rt) 4761 { 4762 struct net_device *dev = rt->dst.dev; 4763 4764 nh->nh_grp = nh_grp; 4765 nh->nh_weight = 1; 4766 memcpy(&nh->gw_addr, &rt->rt6i_gateway, sizeof(nh->gw_addr)); 4767 mlxsw_sp_nexthop_counter_alloc(mlxsw_sp, nh); 4768 4769 list_add_tail(&nh->router_list_node, &mlxsw_sp->router->nexthop_list); 4770 4771 if (!dev) 4772 return 0; 4773 nh->ifindex = dev->ifindex; 4774 4775 return mlxsw_sp_nexthop6_type_init(mlxsw_sp, nh_grp, nh, rt); 4776 } 4777 4778 static void mlxsw_sp_nexthop6_fini(struct mlxsw_sp *mlxsw_sp, 4779 struct mlxsw_sp_nexthop *nh) 4780 { 4781 mlxsw_sp_nexthop6_type_fini(mlxsw_sp, nh); 4782 list_del(&nh->router_list_node); 4783 mlxsw_sp_nexthop_counter_free(mlxsw_sp, nh); 4784 } 4785 4786 static bool mlxsw_sp_rt6_is_gateway(const struct mlxsw_sp *mlxsw_sp, 4787 const struct rt6_info *rt) 4788 { 4789 return rt->rt6i_flags & RTF_GATEWAY || 4790 mlxsw_sp_nexthop6_ipip_type(mlxsw_sp, rt, NULL); 4791 } 4792 4793 static struct mlxsw_sp_nexthop_group * 4794 mlxsw_sp_nexthop6_group_create(struct mlxsw_sp *mlxsw_sp, 4795 struct mlxsw_sp_fib6_entry *fib6_entry) 4796 { 4797 struct mlxsw_sp_nexthop_group *nh_grp; 4798 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 4799 struct mlxsw_sp_nexthop *nh; 4800 size_t alloc_size; 4801 int i = 0; 4802 int err; 4803 4804 alloc_size = sizeof(*nh_grp) + 4805 fib6_entry->nrt6 * sizeof(struct mlxsw_sp_nexthop); 4806 nh_grp = kzalloc(alloc_size, GFP_KERNEL); 4807 if (!nh_grp) 4808 return ERR_PTR(-ENOMEM); 4809 INIT_LIST_HEAD(&nh_grp->fib_list); 4810 #if IS_ENABLED(CONFIG_IPV6) 4811 nh_grp->neigh_tbl = &nd_tbl; 4812 #endif 4813 mlxsw_sp_rt6 = list_first_entry(&fib6_entry->rt6_list, 4814 struct mlxsw_sp_rt6, list); 4815 nh_grp->gateway = mlxsw_sp_rt6_is_gateway(mlxsw_sp, mlxsw_sp_rt6->rt); 4816 nh_grp->count = fib6_entry->nrt6; 4817 for (i = 0; i < nh_grp->count; i++) { 4818 struct rt6_info *rt = mlxsw_sp_rt6->rt; 4819 4820 nh = &nh_grp->nexthops[i]; 4821 err = mlxsw_sp_nexthop6_init(mlxsw_sp, nh_grp, nh, rt); 4822 if (err) 4823 goto err_nexthop6_init; 4824 mlxsw_sp_rt6 = list_next_entry(mlxsw_sp_rt6, list); 4825 } 4826 4827 err = mlxsw_sp_nexthop_group_insert(mlxsw_sp, nh_grp); 4828 if (err) 4829 goto err_nexthop_group_insert; 4830 4831 mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh_grp); 4832 return nh_grp; 4833 4834 err_nexthop_group_insert: 4835 err_nexthop6_init: 4836 for (i--; i >= 0; i--) { 4837 nh = &nh_grp->nexthops[i]; 4838 mlxsw_sp_nexthop6_fini(mlxsw_sp, nh); 4839 } 4840 kfree(nh_grp); 4841 return ERR_PTR(err); 4842 } 4843 4844 static void 4845 mlxsw_sp_nexthop6_group_destroy(struct mlxsw_sp *mlxsw_sp, 4846 struct mlxsw_sp_nexthop_group *nh_grp) 4847 { 4848 struct mlxsw_sp_nexthop *nh; 4849 int i = nh_grp->count; 4850 4851 mlxsw_sp_nexthop_group_remove(mlxsw_sp, nh_grp); 4852 for (i--; i >= 0; i--) { 4853 nh = &nh_grp->nexthops[i]; 4854 mlxsw_sp_nexthop6_fini(mlxsw_sp, nh); 4855 } 4856 mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh_grp); 4857 WARN_ON(nh_grp->adj_index_valid); 4858 kfree(nh_grp); 4859 } 4860 4861 static int mlxsw_sp_nexthop6_group_get(struct mlxsw_sp *mlxsw_sp, 4862 struct mlxsw_sp_fib6_entry *fib6_entry) 4863 { 4864 struct mlxsw_sp_nexthop_group *nh_grp; 4865 4866 nh_grp = mlxsw_sp_nexthop6_group_lookup(mlxsw_sp, fib6_entry); 4867 if (!nh_grp) { 4868 nh_grp = mlxsw_sp_nexthop6_group_create(mlxsw_sp, fib6_entry); 4869 if (IS_ERR(nh_grp)) 4870 return PTR_ERR(nh_grp); 4871 } 4872 4873 list_add_tail(&fib6_entry->common.nexthop_group_node, 4874 &nh_grp->fib_list); 4875 fib6_entry->common.nh_group = nh_grp; 4876 4877 return 0; 4878 } 4879 4880 static void mlxsw_sp_nexthop6_group_put(struct mlxsw_sp *mlxsw_sp, 4881 struct mlxsw_sp_fib_entry *fib_entry) 4882 { 4883 struct mlxsw_sp_nexthop_group *nh_grp = fib_entry->nh_group; 4884 4885 list_del(&fib_entry->nexthop_group_node); 4886 if (!list_empty(&nh_grp->fib_list)) 4887 return; 4888 mlxsw_sp_nexthop6_group_destroy(mlxsw_sp, nh_grp); 4889 } 4890 4891 static int 4892 mlxsw_sp_nexthop6_group_update(struct mlxsw_sp *mlxsw_sp, 4893 struct mlxsw_sp_fib6_entry *fib6_entry) 4894 { 4895 struct mlxsw_sp_nexthop_group *old_nh_grp = fib6_entry->common.nh_group; 4896 int err; 4897 4898 fib6_entry->common.nh_group = NULL; 4899 list_del(&fib6_entry->common.nexthop_group_node); 4900 4901 err = mlxsw_sp_nexthop6_group_get(mlxsw_sp, fib6_entry); 4902 if (err) 4903 goto err_nexthop6_group_get; 4904 4905 /* In case this entry is offloaded, then the adjacency index 4906 * currently associated with it in the device's table is that 4907 * of the old group. Start using the new one instead. 4908 */ 4909 err = mlxsw_sp_fib_node_entry_add(mlxsw_sp, &fib6_entry->common); 4910 if (err) 4911 goto err_fib_node_entry_add; 4912 4913 if (list_empty(&old_nh_grp->fib_list)) 4914 mlxsw_sp_nexthop6_group_destroy(mlxsw_sp, old_nh_grp); 4915 4916 return 0; 4917 4918 err_fib_node_entry_add: 4919 mlxsw_sp_nexthop6_group_put(mlxsw_sp, &fib6_entry->common); 4920 err_nexthop6_group_get: 4921 list_add_tail(&fib6_entry->common.nexthop_group_node, 4922 &old_nh_grp->fib_list); 4923 fib6_entry->common.nh_group = old_nh_grp; 4924 return err; 4925 } 4926 4927 static int 4928 mlxsw_sp_fib6_entry_nexthop_add(struct mlxsw_sp *mlxsw_sp, 4929 struct mlxsw_sp_fib6_entry *fib6_entry, 4930 struct rt6_info *rt) 4931 { 4932 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 4933 int err; 4934 4935 mlxsw_sp_rt6 = mlxsw_sp_rt6_create(rt); 4936 if (IS_ERR(mlxsw_sp_rt6)) 4937 return PTR_ERR(mlxsw_sp_rt6); 4938 4939 list_add_tail(&mlxsw_sp_rt6->list, &fib6_entry->rt6_list); 4940 fib6_entry->nrt6++; 4941 4942 err = mlxsw_sp_nexthop6_group_update(mlxsw_sp, fib6_entry); 4943 if (err) 4944 goto err_nexthop6_group_update; 4945 4946 return 0; 4947 4948 err_nexthop6_group_update: 4949 fib6_entry->nrt6--; 4950 list_del(&mlxsw_sp_rt6->list); 4951 mlxsw_sp_rt6_destroy(mlxsw_sp_rt6); 4952 return err; 4953 } 4954 4955 static void 4956 mlxsw_sp_fib6_entry_nexthop_del(struct mlxsw_sp *mlxsw_sp, 4957 struct mlxsw_sp_fib6_entry *fib6_entry, 4958 struct rt6_info *rt) 4959 { 4960 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 4961 4962 mlxsw_sp_rt6 = mlxsw_sp_fib6_entry_rt_find(fib6_entry, rt); 4963 if (WARN_ON(!mlxsw_sp_rt6)) 4964 return; 4965 4966 fib6_entry->nrt6--; 4967 list_del(&mlxsw_sp_rt6->list); 4968 mlxsw_sp_nexthop6_group_update(mlxsw_sp, fib6_entry); 4969 mlxsw_sp_rt6_destroy(mlxsw_sp_rt6); 4970 } 4971 4972 static void mlxsw_sp_fib6_entry_type_set(struct mlxsw_sp *mlxsw_sp, 4973 struct mlxsw_sp_fib_entry *fib_entry, 4974 const struct rt6_info *rt) 4975 { 4976 /* Packets hitting RTF_REJECT routes need to be discarded by the 4977 * stack. We can rely on their destination device not having a 4978 * RIF (it's the loopback device) and can thus use action type 4979 * local, which will cause them to be trapped with a lower 4980 * priority than packets that need to be locally received. 4981 */ 4982 if (rt->rt6i_flags & (RTF_LOCAL | RTF_ANYCAST)) 4983 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP; 4984 else if (rt->rt6i_flags & RTF_REJECT) 4985 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_LOCAL; 4986 else if (mlxsw_sp_rt6_is_gateway(mlxsw_sp, rt)) 4987 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_REMOTE; 4988 else 4989 fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_LOCAL; 4990 } 4991 4992 static void 4993 mlxsw_sp_fib6_entry_rt_destroy_all(struct mlxsw_sp_fib6_entry *fib6_entry) 4994 { 4995 struct mlxsw_sp_rt6 *mlxsw_sp_rt6, *tmp; 4996 4997 list_for_each_entry_safe(mlxsw_sp_rt6, tmp, &fib6_entry->rt6_list, 4998 list) { 4999 fib6_entry->nrt6--; 5000 list_del(&mlxsw_sp_rt6->list); 5001 mlxsw_sp_rt6_destroy(mlxsw_sp_rt6); 5002 } 5003 } 5004 5005 static struct mlxsw_sp_fib6_entry * 5006 mlxsw_sp_fib6_entry_create(struct mlxsw_sp *mlxsw_sp, 5007 struct mlxsw_sp_fib_node *fib_node, 5008 struct rt6_info *rt) 5009 { 5010 struct mlxsw_sp_fib6_entry *fib6_entry; 5011 struct mlxsw_sp_fib_entry *fib_entry; 5012 struct mlxsw_sp_rt6 *mlxsw_sp_rt6; 5013 int err; 5014 5015 fib6_entry = kzalloc(sizeof(*fib6_entry), GFP_KERNEL); 5016 if (!fib6_entry) 5017 return ERR_PTR(-ENOMEM); 5018 fib_entry = &fib6_entry->common; 5019 5020 mlxsw_sp_rt6 = mlxsw_sp_rt6_create(rt); 5021 if (IS_ERR(mlxsw_sp_rt6)) { 5022 err = PTR_ERR(mlxsw_sp_rt6); 5023 goto err_rt6_create; 5024 } 5025 5026 mlxsw_sp_fib6_entry_type_set(mlxsw_sp, fib_entry, mlxsw_sp_rt6->rt); 5027 5028 INIT_LIST_HEAD(&fib6_entry->rt6_list); 5029 list_add_tail(&mlxsw_sp_rt6->list, &fib6_entry->rt6_list); 5030 fib6_entry->nrt6 = 1; 5031 err = mlxsw_sp_nexthop6_group_get(mlxsw_sp, fib6_entry); 5032 if (err) 5033 goto err_nexthop6_group_get; 5034 5035 fib_entry->fib_node = fib_node; 5036 5037 return fib6_entry; 5038 5039 err_nexthop6_group_get: 5040 list_del(&mlxsw_sp_rt6->list); 5041 mlxsw_sp_rt6_destroy(mlxsw_sp_rt6); 5042 err_rt6_create: 5043 kfree(fib6_entry); 5044 return ERR_PTR(err); 5045 } 5046 5047 static void mlxsw_sp_fib6_entry_destroy(struct mlxsw_sp *mlxsw_sp, 5048 struct mlxsw_sp_fib6_entry *fib6_entry) 5049 { 5050 mlxsw_sp_nexthop6_group_put(mlxsw_sp, &fib6_entry->common); 5051 mlxsw_sp_fib6_entry_rt_destroy_all(fib6_entry); 5052 WARN_ON(fib6_entry->nrt6); 5053 kfree(fib6_entry); 5054 } 5055 5056 static struct mlxsw_sp_fib6_entry * 5057 mlxsw_sp_fib6_node_entry_find(const struct mlxsw_sp_fib_node *fib_node, 5058 const struct rt6_info *nrt, bool replace) 5059 { 5060 struct mlxsw_sp_fib6_entry *fib6_entry, *fallback = NULL; 5061 5062 list_for_each_entry(fib6_entry, &fib_node->entry_list, common.list) { 5063 struct rt6_info *rt = mlxsw_sp_fib6_entry_rt(fib6_entry); 5064 5065 if (rt->rt6i_table->tb6_id > nrt->rt6i_table->tb6_id) 5066 continue; 5067 if (rt->rt6i_table->tb6_id != nrt->rt6i_table->tb6_id) 5068 break; 5069 if (replace && rt->rt6i_metric == nrt->rt6i_metric) { 5070 if (mlxsw_sp_fib6_rt_can_mp(rt) == 5071 mlxsw_sp_fib6_rt_can_mp(nrt)) 5072 return fib6_entry; 5073 if (mlxsw_sp_fib6_rt_can_mp(nrt)) 5074 fallback = fallback ?: fib6_entry; 5075 } 5076 if (rt->rt6i_metric > nrt->rt6i_metric) 5077 return fallback ?: fib6_entry; 5078 } 5079 5080 return fallback; 5081 } 5082 5083 static int 5084 mlxsw_sp_fib6_node_list_insert(struct mlxsw_sp_fib6_entry *new6_entry, 5085 bool replace) 5086 { 5087 struct mlxsw_sp_fib_node *fib_node = new6_entry->common.fib_node; 5088 struct rt6_info *nrt = mlxsw_sp_fib6_entry_rt(new6_entry); 5089 struct mlxsw_sp_fib6_entry *fib6_entry; 5090 5091 fib6_entry = mlxsw_sp_fib6_node_entry_find(fib_node, nrt, replace); 5092 5093 if (replace && WARN_ON(!fib6_entry)) 5094 return -EINVAL; 5095 5096 if (fib6_entry) { 5097 list_add_tail(&new6_entry->common.list, 5098 &fib6_entry->common.list); 5099 } else { 5100 struct mlxsw_sp_fib6_entry *last; 5101 5102 list_for_each_entry(last, &fib_node->entry_list, common.list) { 5103 struct rt6_info *rt = mlxsw_sp_fib6_entry_rt(last); 5104 5105 if (nrt->rt6i_table->tb6_id > rt->rt6i_table->tb6_id) 5106 break; 5107 fib6_entry = last; 5108 } 5109 5110 if (fib6_entry) 5111 list_add(&new6_entry->common.list, 5112 &fib6_entry->common.list); 5113 else 5114 list_add(&new6_entry->common.list, 5115 &fib_node->entry_list); 5116 } 5117 5118 return 0; 5119 } 5120 5121 static void 5122 mlxsw_sp_fib6_node_list_remove(struct mlxsw_sp_fib6_entry *fib6_entry) 5123 { 5124 list_del(&fib6_entry->common.list); 5125 } 5126 5127 static int mlxsw_sp_fib6_node_entry_link(struct mlxsw_sp *mlxsw_sp, 5128 struct mlxsw_sp_fib6_entry *fib6_entry, 5129 bool replace) 5130 { 5131 int err; 5132 5133 err = mlxsw_sp_fib6_node_list_insert(fib6_entry, replace); 5134 if (err) 5135 return err; 5136 5137 err = mlxsw_sp_fib_node_entry_add(mlxsw_sp, &fib6_entry->common); 5138 if (err) 5139 goto err_fib_node_entry_add; 5140 5141 return 0; 5142 5143 err_fib_node_entry_add: 5144 mlxsw_sp_fib6_node_list_remove(fib6_entry); 5145 return err; 5146 } 5147 5148 static void 5149 mlxsw_sp_fib6_node_entry_unlink(struct mlxsw_sp *mlxsw_sp, 5150 struct mlxsw_sp_fib6_entry *fib6_entry) 5151 { 5152 mlxsw_sp_fib_node_entry_del(mlxsw_sp, &fib6_entry->common); 5153 mlxsw_sp_fib6_node_list_remove(fib6_entry); 5154 } 5155 5156 static struct mlxsw_sp_fib6_entry * 5157 mlxsw_sp_fib6_entry_lookup(struct mlxsw_sp *mlxsw_sp, 5158 const struct rt6_info *rt) 5159 { 5160 struct mlxsw_sp_fib6_entry *fib6_entry; 5161 struct mlxsw_sp_fib_node *fib_node; 5162 struct mlxsw_sp_fib *fib; 5163 struct mlxsw_sp_vr *vr; 5164 5165 vr = mlxsw_sp_vr_find(mlxsw_sp, rt->rt6i_table->tb6_id); 5166 if (!vr) 5167 return NULL; 5168 fib = mlxsw_sp_vr_fib(vr, MLXSW_SP_L3_PROTO_IPV6); 5169 5170 fib_node = mlxsw_sp_fib_node_lookup(fib, &rt->rt6i_dst.addr, 5171 sizeof(rt->rt6i_dst.addr), 5172 rt->rt6i_dst.plen); 5173 if (!fib_node) 5174 return NULL; 5175 5176 list_for_each_entry(fib6_entry, &fib_node->entry_list, common.list) { 5177 struct rt6_info *iter_rt = mlxsw_sp_fib6_entry_rt(fib6_entry); 5178 5179 if (rt->rt6i_table->tb6_id == iter_rt->rt6i_table->tb6_id && 5180 rt->rt6i_metric == iter_rt->rt6i_metric && 5181 mlxsw_sp_fib6_entry_rt_find(fib6_entry, rt)) 5182 return fib6_entry; 5183 } 5184 5185 return NULL; 5186 } 5187 5188 static void mlxsw_sp_fib6_entry_replace(struct mlxsw_sp *mlxsw_sp, 5189 struct mlxsw_sp_fib6_entry *fib6_entry, 5190 bool replace) 5191 { 5192 struct mlxsw_sp_fib_node *fib_node = fib6_entry->common.fib_node; 5193 struct mlxsw_sp_fib6_entry *replaced; 5194 5195 if (!replace) 5196 return; 5197 5198 replaced = list_next_entry(fib6_entry, common.list); 5199 5200 mlxsw_sp_fib6_node_entry_unlink(mlxsw_sp, replaced); 5201 mlxsw_sp_fib6_entry_destroy(mlxsw_sp, replaced); 5202 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 5203 } 5204 5205 static int mlxsw_sp_router_fib6_add(struct mlxsw_sp *mlxsw_sp, 5206 struct rt6_info *rt, bool replace) 5207 { 5208 struct mlxsw_sp_fib6_entry *fib6_entry; 5209 struct mlxsw_sp_fib_node *fib_node; 5210 int err; 5211 5212 if (mlxsw_sp->router->aborted) 5213 return 0; 5214 5215 if (rt->rt6i_src.plen) 5216 return -EINVAL; 5217 5218 if (mlxsw_sp_fib6_rt_should_ignore(rt)) 5219 return 0; 5220 5221 fib_node = mlxsw_sp_fib_node_get(mlxsw_sp, rt->rt6i_table->tb6_id, 5222 &rt->rt6i_dst.addr, 5223 sizeof(rt->rt6i_dst.addr), 5224 rt->rt6i_dst.plen, 5225 MLXSW_SP_L3_PROTO_IPV6); 5226 if (IS_ERR(fib_node)) 5227 return PTR_ERR(fib_node); 5228 5229 /* Before creating a new entry, try to append route to an existing 5230 * multipath entry. 5231 */ 5232 fib6_entry = mlxsw_sp_fib6_node_mp_entry_find(fib_node, rt, replace); 5233 if (fib6_entry) { 5234 err = mlxsw_sp_fib6_entry_nexthop_add(mlxsw_sp, fib6_entry, rt); 5235 if (err) 5236 goto err_fib6_entry_nexthop_add; 5237 return 0; 5238 } 5239 5240 fib6_entry = mlxsw_sp_fib6_entry_create(mlxsw_sp, fib_node, rt); 5241 if (IS_ERR(fib6_entry)) { 5242 err = PTR_ERR(fib6_entry); 5243 goto err_fib6_entry_create; 5244 } 5245 5246 err = mlxsw_sp_fib6_node_entry_link(mlxsw_sp, fib6_entry, replace); 5247 if (err) 5248 goto err_fib6_node_entry_link; 5249 5250 mlxsw_sp_fib6_entry_replace(mlxsw_sp, fib6_entry, replace); 5251 5252 return 0; 5253 5254 err_fib6_node_entry_link: 5255 mlxsw_sp_fib6_entry_destroy(mlxsw_sp, fib6_entry); 5256 err_fib6_entry_create: 5257 err_fib6_entry_nexthop_add: 5258 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 5259 return err; 5260 } 5261 5262 static void mlxsw_sp_router_fib6_del(struct mlxsw_sp *mlxsw_sp, 5263 struct rt6_info *rt) 5264 { 5265 struct mlxsw_sp_fib6_entry *fib6_entry; 5266 struct mlxsw_sp_fib_node *fib_node; 5267 5268 if (mlxsw_sp->router->aborted) 5269 return; 5270 5271 if (mlxsw_sp_fib6_rt_should_ignore(rt)) 5272 return; 5273 5274 fib6_entry = mlxsw_sp_fib6_entry_lookup(mlxsw_sp, rt); 5275 if (WARN_ON(!fib6_entry)) 5276 return; 5277 5278 /* If route is part of a multipath entry, but not the last one 5279 * removed, then only reduce its nexthop group. 5280 */ 5281 if (!list_is_singular(&fib6_entry->rt6_list)) { 5282 mlxsw_sp_fib6_entry_nexthop_del(mlxsw_sp, fib6_entry, rt); 5283 return; 5284 } 5285 5286 fib_node = fib6_entry->common.fib_node; 5287 5288 mlxsw_sp_fib6_node_entry_unlink(mlxsw_sp, fib6_entry); 5289 mlxsw_sp_fib6_entry_destroy(mlxsw_sp, fib6_entry); 5290 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 5291 } 5292 5293 static int __mlxsw_sp_router_set_abort_trap(struct mlxsw_sp *mlxsw_sp, 5294 enum mlxsw_reg_ralxx_protocol proto, 5295 u8 tree_id) 5296 { 5297 char ralta_pl[MLXSW_REG_RALTA_LEN]; 5298 char ralst_pl[MLXSW_REG_RALST_LEN]; 5299 int i, err; 5300 5301 mlxsw_reg_ralta_pack(ralta_pl, true, proto, tree_id); 5302 err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralta), ralta_pl); 5303 if (err) 5304 return err; 5305 5306 mlxsw_reg_ralst_pack(ralst_pl, 0xff, tree_id); 5307 err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralst), ralst_pl); 5308 if (err) 5309 return err; 5310 5311 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); i++) { 5312 struct mlxsw_sp_vr *vr = &mlxsw_sp->router->vrs[i]; 5313 char raltb_pl[MLXSW_REG_RALTB_LEN]; 5314 char ralue_pl[MLXSW_REG_RALUE_LEN]; 5315 5316 mlxsw_reg_raltb_pack(raltb_pl, vr->id, proto, tree_id); 5317 err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(raltb), 5318 raltb_pl); 5319 if (err) 5320 return err; 5321 5322 mlxsw_reg_ralue_pack(ralue_pl, proto, 5323 MLXSW_REG_RALUE_OP_WRITE_WRITE, vr->id, 0); 5324 mlxsw_reg_ralue_act_ip2me_pack(ralue_pl); 5325 err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), 5326 ralue_pl); 5327 if (err) 5328 return err; 5329 } 5330 5331 return 0; 5332 } 5333 5334 static int mlxsw_sp_router_fibmr_add(struct mlxsw_sp *mlxsw_sp, 5335 struct mfc_entry_notifier_info *men_info, 5336 bool replace) 5337 { 5338 struct mlxsw_sp_vr *vr; 5339 5340 if (mlxsw_sp->router->aborted) 5341 return 0; 5342 5343 vr = mlxsw_sp_vr_get(mlxsw_sp, men_info->tb_id, NULL); 5344 if (IS_ERR(vr)) 5345 return PTR_ERR(vr); 5346 5347 return mlxsw_sp_mr_route4_add(vr->mr4_table, men_info->mfc, replace); 5348 } 5349 5350 static void mlxsw_sp_router_fibmr_del(struct mlxsw_sp *mlxsw_sp, 5351 struct mfc_entry_notifier_info *men_info) 5352 { 5353 struct mlxsw_sp_vr *vr; 5354 5355 if (mlxsw_sp->router->aborted) 5356 return; 5357 5358 vr = mlxsw_sp_vr_find(mlxsw_sp, men_info->tb_id); 5359 if (WARN_ON(!vr)) 5360 return; 5361 5362 mlxsw_sp_mr_route4_del(vr->mr4_table, men_info->mfc); 5363 mlxsw_sp_vr_put(vr); 5364 } 5365 5366 static int 5367 mlxsw_sp_router_fibmr_vif_add(struct mlxsw_sp *mlxsw_sp, 5368 struct vif_entry_notifier_info *ven_info) 5369 { 5370 struct mlxsw_sp_rif *rif; 5371 struct mlxsw_sp_vr *vr; 5372 5373 if (mlxsw_sp->router->aborted) 5374 return 0; 5375 5376 vr = mlxsw_sp_vr_get(mlxsw_sp, ven_info->tb_id, NULL); 5377 if (IS_ERR(vr)) 5378 return PTR_ERR(vr); 5379 5380 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, ven_info->dev); 5381 return mlxsw_sp_mr_vif_add(vr->mr4_table, ven_info->dev, 5382 ven_info->vif_index, 5383 ven_info->vif_flags, rif); 5384 } 5385 5386 static void 5387 mlxsw_sp_router_fibmr_vif_del(struct mlxsw_sp *mlxsw_sp, 5388 struct vif_entry_notifier_info *ven_info) 5389 { 5390 struct mlxsw_sp_vr *vr; 5391 5392 if (mlxsw_sp->router->aborted) 5393 return; 5394 5395 vr = mlxsw_sp_vr_find(mlxsw_sp, ven_info->tb_id); 5396 if (WARN_ON(!vr)) 5397 return; 5398 5399 mlxsw_sp_mr_vif_del(vr->mr4_table, ven_info->vif_index); 5400 mlxsw_sp_vr_put(vr); 5401 } 5402 5403 static int mlxsw_sp_router_set_abort_trap(struct mlxsw_sp *mlxsw_sp) 5404 { 5405 enum mlxsw_reg_ralxx_protocol proto = MLXSW_REG_RALXX_PROTOCOL_IPV4; 5406 int err; 5407 5408 err = __mlxsw_sp_router_set_abort_trap(mlxsw_sp, proto, 5409 MLXSW_SP_LPM_TREE_MIN); 5410 if (err) 5411 return err; 5412 5413 /* The multicast router code does not need an abort trap as by default, 5414 * packets that don't match any routes are trapped to the CPU. 5415 */ 5416 5417 proto = MLXSW_REG_RALXX_PROTOCOL_IPV6; 5418 return __mlxsw_sp_router_set_abort_trap(mlxsw_sp, proto, 5419 MLXSW_SP_LPM_TREE_MIN + 1); 5420 } 5421 5422 static void mlxsw_sp_fib4_node_flush(struct mlxsw_sp *mlxsw_sp, 5423 struct mlxsw_sp_fib_node *fib_node) 5424 { 5425 struct mlxsw_sp_fib4_entry *fib4_entry, *tmp; 5426 5427 list_for_each_entry_safe(fib4_entry, tmp, &fib_node->entry_list, 5428 common.list) { 5429 bool do_break = &tmp->common.list == &fib_node->entry_list; 5430 5431 mlxsw_sp_fib4_node_entry_unlink(mlxsw_sp, fib4_entry); 5432 mlxsw_sp_fib4_entry_destroy(mlxsw_sp, fib4_entry); 5433 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 5434 /* Break when entry list is empty and node was freed. 5435 * Otherwise, we'll access freed memory in the next 5436 * iteration. 5437 */ 5438 if (do_break) 5439 break; 5440 } 5441 } 5442 5443 static void mlxsw_sp_fib6_node_flush(struct mlxsw_sp *mlxsw_sp, 5444 struct mlxsw_sp_fib_node *fib_node) 5445 { 5446 struct mlxsw_sp_fib6_entry *fib6_entry, *tmp; 5447 5448 list_for_each_entry_safe(fib6_entry, tmp, &fib_node->entry_list, 5449 common.list) { 5450 bool do_break = &tmp->common.list == &fib_node->entry_list; 5451 5452 mlxsw_sp_fib6_node_entry_unlink(mlxsw_sp, fib6_entry); 5453 mlxsw_sp_fib6_entry_destroy(mlxsw_sp, fib6_entry); 5454 mlxsw_sp_fib_node_put(mlxsw_sp, fib_node); 5455 if (do_break) 5456 break; 5457 } 5458 } 5459 5460 static void mlxsw_sp_fib_node_flush(struct mlxsw_sp *mlxsw_sp, 5461 struct mlxsw_sp_fib_node *fib_node) 5462 { 5463 switch (fib_node->fib->proto) { 5464 case MLXSW_SP_L3_PROTO_IPV4: 5465 mlxsw_sp_fib4_node_flush(mlxsw_sp, fib_node); 5466 break; 5467 case MLXSW_SP_L3_PROTO_IPV6: 5468 mlxsw_sp_fib6_node_flush(mlxsw_sp, fib_node); 5469 break; 5470 } 5471 } 5472 5473 static void mlxsw_sp_vr_fib_flush(struct mlxsw_sp *mlxsw_sp, 5474 struct mlxsw_sp_vr *vr, 5475 enum mlxsw_sp_l3proto proto) 5476 { 5477 struct mlxsw_sp_fib *fib = mlxsw_sp_vr_fib(vr, proto); 5478 struct mlxsw_sp_fib_node *fib_node, *tmp; 5479 5480 list_for_each_entry_safe(fib_node, tmp, &fib->node_list, list) { 5481 bool do_break = &tmp->list == &fib->node_list; 5482 5483 mlxsw_sp_fib_node_flush(mlxsw_sp, fib_node); 5484 if (do_break) 5485 break; 5486 } 5487 } 5488 5489 static void mlxsw_sp_router_fib_flush(struct mlxsw_sp *mlxsw_sp) 5490 { 5491 int i; 5492 5493 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); i++) { 5494 struct mlxsw_sp_vr *vr = &mlxsw_sp->router->vrs[i]; 5495 5496 if (!mlxsw_sp_vr_is_used(vr)) 5497 continue; 5498 5499 mlxsw_sp_mr_table_flush(vr->mr4_table); 5500 mlxsw_sp_vr_fib_flush(mlxsw_sp, vr, MLXSW_SP_L3_PROTO_IPV4); 5501 5502 /* If virtual router was only used for IPv4, then it's no 5503 * longer used. 5504 */ 5505 if (!mlxsw_sp_vr_is_used(vr)) 5506 continue; 5507 mlxsw_sp_vr_fib_flush(mlxsw_sp, vr, MLXSW_SP_L3_PROTO_IPV6); 5508 } 5509 } 5510 5511 static void mlxsw_sp_router_fib_abort(struct mlxsw_sp *mlxsw_sp) 5512 { 5513 int err; 5514 5515 if (mlxsw_sp->router->aborted) 5516 return; 5517 dev_warn(mlxsw_sp->bus_info->dev, "FIB abort triggered. Note that FIB entries are no longer being offloaded to this device.\n"); 5518 mlxsw_sp_router_fib_flush(mlxsw_sp); 5519 mlxsw_sp->router->aborted = true; 5520 err = mlxsw_sp_router_set_abort_trap(mlxsw_sp); 5521 if (err) 5522 dev_warn(mlxsw_sp->bus_info->dev, "Failed to set abort trap.\n"); 5523 } 5524 5525 struct mlxsw_sp_fib_event_work { 5526 struct work_struct work; 5527 union { 5528 struct fib6_entry_notifier_info fen6_info; 5529 struct fib_entry_notifier_info fen_info; 5530 struct fib_rule_notifier_info fr_info; 5531 struct fib_nh_notifier_info fnh_info; 5532 struct mfc_entry_notifier_info men_info; 5533 struct vif_entry_notifier_info ven_info; 5534 }; 5535 struct mlxsw_sp *mlxsw_sp; 5536 unsigned long event; 5537 }; 5538 5539 static void mlxsw_sp_router_fib4_event_work(struct work_struct *work) 5540 { 5541 struct mlxsw_sp_fib_event_work *fib_work = 5542 container_of(work, struct mlxsw_sp_fib_event_work, work); 5543 struct mlxsw_sp *mlxsw_sp = fib_work->mlxsw_sp; 5544 bool replace, append; 5545 int err; 5546 5547 /* Protect internal structures from changes */ 5548 rtnl_lock(); 5549 switch (fib_work->event) { 5550 case FIB_EVENT_ENTRY_REPLACE: /* fall through */ 5551 case FIB_EVENT_ENTRY_APPEND: /* fall through */ 5552 case FIB_EVENT_ENTRY_ADD: 5553 replace = fib_work->event == FIB_EVENT_ENTRY_REPLACE; 5554 append = fib_work->event == FIB_EVENT_ENTRY_APPEND; 5555 err = mlxsw_sp_router_fib4_add(mlxsw_sp, &fib_work->fen_info, 5556 replace, append); 5557 if (err) 5558 mlxsw_sp_router_fib_abort(mlxsw_sp); 5559 fib_info_put(fib_work->fen_info.fi); 5560 break; 5561 case FIB_EVENT_ENTRY_DEL: 5562 mlxsw_sp_router_fib4_del(mlxsw_sp, &fib_work->fen_info); 5563 fib_info_put(fib_work->fen_info.fi); 5564 break; 5565 case FIB_EVENT_RULE_ADD: 5566 /* if we get here, a rule was added that we do not support. 5567 * just do the fib_abort 5568 */ 5569 mlxsw_sp_router_fib_abort(mlxsw_sp); 5570 break; 5571 case FIB_EVENT_NH_ADD: /* fall through */ 5572 case FIB_EVENT_NH_DEL: 5573 mlxsw_sp_nexthop4_event(mlxsw_sp, fib_work->event, 5574 fib_work->fnh_info.fib_nh); 5575 fib_info_put(fib_work->fnh_info.fib_nh->nh_parent); 5576 break; 5577 } 5578 rtnl_unlock(); 5579 kfree(fib_work); 5580 } 5581 5582 static void mlxsw_sp_router_fib6_event_work(struct work_struct *work) 5583 { 5584 struct mlxsw_sp_fib_event_work *fib_work = 5585 container_of(work, struct mlxsw_sp_fib_event_work, work); 5586 struct mlxsw_sp *mlxsw_sp = fib_work->mlxsw_sp; 5587 bool replace; 5588 int err; 5589 5590 rtnl_lock(); 5591 switch (fib_work->event) { 5592 case FIB_EVENT_ENTRY_REPLACE: /* fall through */ 5593 case FIB_EVENT_ENTRY_ADD: 5594 replace = fib_work->event == FIB_EVENT_ENTRY_REPLACE; 5595 err = mlxsw_sp_router_fib6_add(mlxsw_sp, 5596 fib_work->fen6_info.rt, replace); 5597 if (err) 5598 mlxsw_sp_router_fib_abort(mlxsw_sp); 5599 mlxsw_sp_rt6_release(fib_work->fen6_info.rt); 5600 break; 5601 case FIB_EVENT_ENTRY_DEL: 5602 mlxsw_sp_router_fib6_del(mlxsw_sp, fib_work->fen6_info.rt); 5603 mlxsw_sp_rt6_release(fib_work->fen6_info.rt); 5604 break; 5605 case FIB_EVENT_RULE_ADD: 5606 /* if we get here, a rule was added that we do not support. 5607 * just do the fib_abort 5608 */ 5609 mlxsw_sp_router_fib_abort(mlxsw_sp); 5610 break; 5611 } 5612 rtnl_unlock(); 5613 kfree(fib_work); 5614 } 5615 5616 static void mlxsw_sp_router_fibmr_event_work(struct work_struct *work) 5617 { 5618 struct mlxsw_sp_fib_event_work *fib_work = 5619 container_of(work, struct mlxsw_sp_fib_event_work, work); 5620 struct mlxsw_sp *mlxsw_sp = fib_work->mlxsw_sp; 5621 bool replace; 5622 int err; 5623 5624 rtnl_lock(); 5625 switch (fib_work->event) { 5626 case FIB_EVENT_ENTRY_REPLACE: /* fall through */ 5627 case FIB_EVENT_ENTRY_ADD: 5628 replace = fib_work->event == FIB_EVENT_ENTRY_REPLACE; 5629 5630 err = mlxsw_sp_router_fibmr_add(mlxsw_sp, &fib_work->men_info, 5631 replace); 5632 if (err) 5633 mlxsw_sp_router_fib_abort(mlxsw_sp); 5634 ipmr_cache_put(fib_work->men_info.mfc); 5635 break; 5636 case FIB_EVENT_ENTRY_DEL: 5637 mlxsw_sp_router_fibmr_del(mlxsw_sp, &fib_work->men_info); 5638 ipmr_cache_put(fib_work->men_info.mfc); 5639 break; 5640 case FIB_EVENT_VIF_ADD: 5641 err = mlxsw_sp_router_fibmr_vif_add(mlxsw_sp, 5642 &fib_work->ven_info); 5643 if (err) 5644 mlxsw_sp_router_fib_abort(mlxsw_sp); 5645 dev_put(fib_work->ven_info.dev); 5646 break; 5647 case FIB_EVENT_VIF_DEL: 5648 mlxsw_sp_router_fibmr_vif_del(mlxsw_sp, 5649 &fib_work->ven_info); 5650 dev_put(fib_work->ven_info.dev); 5651 break; 5652 case FIB_EVENT_RULE_ADD: 5653 /* if we get here, a rule was added that we do not support. 5654 * just do the fib_abort 5655 */ 5656 mlxsw_sp_router_fib_abort(mlxsw_sp); 5657 break; 5658 } 5659 rtnl_unlock(); 5660 kfree(fib_work); 5661 } 5662 5663 static void mlxsw_sp_router_fib4_event(struct mlxsw_sp_fib_event_work *fib_work, 5664 struct fib_notifier_info *info) 5665 { 5666 struct fib_entry_notifier_info *fen_info; 5667 struct fib_nh_notifier_info *fnh_info; 5668 5669 switch (fib_work->event) { 5670 case FIB_EVENT_ENTRY_REPLACE: /* fall through */ 5671 case FIB_EVENT_ENTRY_APPEND: /* fall through */ 5672 case FIB_EVENT_ENTRY_ADD: /* fall through */ 5673 case FIB_EVENT_ENTRY_DEL: 5674 fen_info = container_of(info, struct fib_entry_notifier_info, 5675 info); 5676 fib_work->fen_info = *fen_info; 5677 /* Take reference on fib_info to prevent it from being 5678 * freed while work is queued. Release it afterwards. 5679 */ 5680 fib_info_hold(fib_work->fen_info.fi); 5681 break; 5682 case FIB_EVENT_NH_ADD: /* fall through */ 5683 case FIB_EVENT_NH_DEL: 5684 fnh_info = container_of(info, struct fib_nh_notifier_info, 5685 info); 5686 fib_work->fnh_info = *fnh_info; 5687 fib_info_hold(fib_work->fnh_info.fib_nh->nh_parent); 5688 break; 5689 } 5690 } 5691 5692 static void mlxsw_sp_router_fib6_event(struct mlxsw_sp_fib_event_work *fib_work, 5693 struct fib_notifier_info *info) 5694 { 5695 struct fib6_entry_notifier_info *fen6_info; 5696 5697 switch (fib_work->event) { 5698 case FIB_EVENT_ENTRY_REPLACE: /* fall through */ 5699 case FIB_EVENT_ENTRY_ADD: /* fall through */ 5700 case FIB_EVENT_ENTRY_DEL: 5701 fen6_info = container_of(info, struct fib6_entry_notifier_info, 5702 info); 5703 fib_work->fen6_info = *fen6_info; 5704 rt6_hold(fib_work->fen6_info.rt); 5705 break; 5706 } 5707 } 5708 5709 static void 5710 mlxsw_sp_router_fibmr_event(struct mlxsw_sp_fib_event_work *fib_work, 5711 struct fib_notifier_info *info) 5712 { 5713 switch (fib_work->event) { 5714 case FIB_EVENT_ENTRY_REPLACE: /* fall through */ 5715 case FIB_EVENT_ENTRY_ADD: /* fall through */ 5716 case FIB_EVENT_ENTRY_DEL: 5717 memcpy(&fib_work->men_info, info, sizeof(fib_work->men_info)); 5718 ipmr_cache_hold(fib_work->men_info.mfc); 5719 break; 5720 case FIB_EVENT_VIF_ADD: /* fall through */ 5721 case FIB_EVENT_VIF_DEL: 5722 memcpy(&fib_work->ven_info, info, sizeof(fib_work->ven_info)); 5723 dev_hold(fib_work->ven_info.dev); 5724 break; 5725 } 5726 } 5727 5728 static int mlxsw_sp_router_fib_rule_event(unsigned long event, 5729 struct fib_notifier_info *info, 5730 struct mlxsw_sp *mlxsw_sp) 5731 { 5732 struct netlink_ext_ack *extack = info->extack; 5733 struct fib_rule_notifier_info *fr_info; 5734 struct fib_rule *rule; 5735 int err = 0; 5736 5737 /* nothing to do at the moment */ 5738 if (event == FIB_EVENT_RULE_DEL) 5739 return 0; 5740 5741 if (mlxsw_sp->router->aborted) 5742 return 0; 5743 5744 fr_info = container_of(info, struct fib_rule_notifier_info, info); 5745 rule = fr_info->rule; 5746 5747 switch (info->family) { 5748 case AF_INET: 5749 if (!fib4_rule_default(rule) && !rule->l3mdev) 5750 err = -1; 5751 break; 5752 case AF_INET6: 5753 if (!fib6_rule_default(rule) && !rule->l3mdev) 5754 err = -1; 5755 break; 5756 case RTNL_FAMILY_IPMR: 5757 if (!ipmr_rule_default(rule) && !rule->l3mdev) 5758 err = -1; 5759 break; 5760 } 5761 5762 if (err < 0) 5763 NL_SET_ERR_MSG(extack, "spectrum: FIB rules not supported. Aborting offload"); 5764 5765 return err; 5766 } 5767 5768 /* Called with rcu_read_lock() */ 5769 static int mlxsw_sp_router_fib_event(struct notifier_block *nb, 5770 unsigned long event, void *ptr) 5771 { 5772 struct mlxsw_sp_fib_event_work *fib_work; 5773 struct fib_notifier_info *info = ptr; 5774 struct mlxsw_sp_router *router; 5775 int err; 5776 5777 if (!net_eq(info->net, &init_net) || 5778 (info->family != AF_INET && info->family != AF_INET6 && 5779 info->family != RTNL_FAMILY_IPMR)) 5780 return NOTIFY_DONE; 5781 5782 router = container_of(nb, struct mlxsw_sp_router, fib_nb); 5783 5784 switch (event) { 5785 case FIB_EVENT_RULE_ADD: /* fall through */ 5786 case FIB_EVENT_RULE_DEL: 5787 err = mlxsw_sp_router_fib_rule_event(event, info, 5788 router->mlxsw_sp); 5789 if (!err) 5790 return NOTIFY_DONE; 5791 } 5792 5793 fib_work = kzalloc(sizeof(*fib_work), GFP_ATOMIC); 5794 if (WARN_ON(!fib_work)) 5795 return NOTIFY_BAD; 5796 5797 fib_work->mlxsw_sp = router->mlxsw_sp; 5798 fib_work->event = event; 5799 5800 switch (info->family) { 5801 case AF_INET: 5802 INIT_WORK(&fib_work->work, mlxsw_sp_router_fib4_event_work); 5803 mlxsw_sp_router_fib4_event(fib_work, info); 5804 break; 5805 case AF_INET6: 5806 INIT_WORK(&fib_work->work, mlxsw_sp_router_fib6_event_work); 5807 mlxsw_sp_router_fib6_event(fib_work, info); 5808 break; 5809 case RTNL_FAMILY_IPMR: 5810 INIT_WORK(&fib_work->work, mlxsw_sp_router_fibmr_event_work); 5811 mlxsw_sp_router_fibmr_event(fib_work, info); 5812 break; 5813 } 5814 5815 mlxsw_core_schedule_work(&fib_work->work); 5816 5817 return NOTIFY_DONE; 5818 } 5819 5820 static struct mlxsw_sp_rif * 5821 mlxsw_sp_rif_find_by_dev(const struct mlxsw_sp *mlxsw_sp, 5822 const struct net_device *dev) 5823 { 5824 int i; 5825 5826 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS); i++) 5827 if (mlxsw_sp->router->rifs[i] && 5828 mlxsw_sp->router->rifs[i]->dev == dev) 5829 return mlxsw_sp->router->rifs[i]; 5830 5831 return NULL; 5832 } 5833 5834 static int mlxsw_sp_router_rif_disable(struct mlxsw_sp *mlxsw_sp, u16 rif) 5835 { 5836 char ritr_pl[MLXSW_REG_RITR_LEN]; 5837 int err; 5838 5839 mlxsw_reg_ritr_rif_pack(ritr_pl, rif); 5840 err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 5841 if (WARN_ON_ONCE(err)) 5842 return err; 5843 5844 mlxsw_reg_ritr_enable_set(ritr_pl, false); 5845 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 5846 } 5847 5848 static void mlxsw_sp_router_rif_gone_sync(struct mlxsw_sp *mlxsw_sp, 5849 struct mlxsw_sp_rif *rif) 5850 { 5851 mlxsw_sp_router_rif_disable(mlxsw_sp, rif->rif_index); 5852 mlxsw_sp_nexthop_rif_gone_sync(mlxsw_sp, rif); 5853 mlxsw_sp_neigh_rif_gone_sync(mlxsw_sp, rif); 5854 } 5855 5856 static bool 5857 mlxsw_sp_rif_should_config(struct mlxsw_sp_rif *rif, struct net_device *dev, 5858 unsigned long event) 5859 { 5860 struct inet6_dev *inet6_dev; 5861 bool addr_list_empty = true; 5862 struct in_device *idev; 5863 5864 switch (event) { 5865 case NETDEV_UP: 5866 return rif == NULL; 5867 case NETDEV_DOWN: 5868 idev = __in_dev_get_rtnl(dev); 5869 if (idev && idev->ifa_list) 5870 addr_list_empty = false; 5871 5872 inet6_dev = __in6_dev_get(dev); 5873 if (addr_list_empty && inet6_dev && 5874 !list_empty(&inet6_dev->addr_list)) 5875 addr_list_empty = false; 5876 5877 if (rif && addr_list_empty && 5878 !netif_is_l3_slave(rif->dev)) 5879 return true; 5880 /* It is possible we already removed the RIF ourselves 5881 * if it was assigned to a netdev that is now a bridge 5882 * or LAG slave. 5883 */ 5884 return false; 5885 } 5886 5887 return false; 5888 } 5889 5890 static enum mlxsw_sp_rif_type 5891 mlxsw_sp_dev_rif_type(const struct mlxsw_sp *mlxsw_sp, 5892 const struct net_device *dev) 5893 { 5894 enum mlxsw_sp_fid_type type; 5895 5896 if (mlxsw_sp_netdev_ipip_type(mlxsw_sp, dev, NULL)) 5897 return MLXSW_SP_RIF_TYPE_IPIP_LB; 5898 5899 /* Otherwise RIF type is derived from the type of the underlying FID. */ 5900 if (is_vlan_dev(dev) && netif_is_bridge_master(vlan_dev_real_dev(dev))) 5901 type = MLXSW_SP_FID_TYPE_8021Q; 5902 else if (netif_is_bridge_master(dev) && br_vlan_enabled(dev)) 5903 type = MLXSW_SP_FID_TYPE_8021Q; 5904 else if (netif_is_bridge_master(dev)) 5905 type = MLXSW_SP_FID_TYPE_8021D; 5906 else 5907 type = MLXSW_SP_FID_TYPE_RFID; 5908 5909 return mlxsw_sp_fid_type_rif_type(mlxsw_sp, type); 5910 } 5911 5912 static int mlxsw_sp_rif_index_alloc(struct mlxsw_sp *mlxsw_sp, u16 *p_rif_index) 5913 { 5914 int i; 5915 5916 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS); i++) { 5917 if (!mlxsw_sp->router->rifs[i]) { 5918 *p_rif_index = i; 5919 return 0; 5920 } 5921 } 5922 5923 return -ENOBUFS; 5924 } 5925 5926 static struct mlxsw_sp_rif *mlxsw_sp_rif_alloc(size_t rif_size, u16 rif_index, 5927 u16 vr_id, 5928 struct net_device *l3_dev) 5929 { 5930 struct mlxsw_sp_rif *rif; 5931 5932 rif = kzalloc(rif_size, GFP_KERNEL); 5933 if (!rif) 5934 return NULL; 5935 5936 INIT_LIST_HEAD(&rif->nexthop_list); 5937 INIT_LIST_HEAD(&rif->neigh_list); 5938 ether_addr_copy(rif->addr, l3_dev->dev_addr); 5939 rif->mtu = l3_dev->mtu; 5940 rif->vr_id = vr_id; 5941 rif->dev = l3_dev; 5942 rif->rif_index = rif_index; 5943 5944 return rif; 5945 } 5946 5947 struct mlxsw_sp_rif *mlxsw_sp_rif_by_index(const struct mlxsw_sp *mlxsw_sp, 5948 u16 rif_index) 5949 { 5950 return mlxsw_sp->router->rifs[rif_index]; 5951 } 5952 5953 u16 mlxsw_sp_rif_index(const struct mlxsw_sp_rif *rif) 5954 { 5955 return rif->rif_index; 5956 } 5957 5958 u16 mlxsw_sp_ipip_lb_rif_index(const struct mlxsw_sp_rif_ipip_lb *lb_rif) 5959 { 5960 return lb_rif->common.rif_index; 5961 } 5962 5963 u16 mlxsw_sp_ipip_lb_ul_vr_id(const struct mlxsw_sp_rif_ipip_lb *lb_rif) 5964 { 5965 return lb_rif->ul_vr_id; 5966 } 5967 5968 int mlxsw_sp_rif_dev_ifindex(const struct mlxsw_sp_rif *rif) 5969 { 5970 return rif->dev->ifindex; 5971 } 5972 5973 const struct net_device *mlxsw_sp_rif_dev(const struct mlxsw_sp_rif *rif) 5974 { 5975 return rif->dev; 5976 } 5977 5978 static struct mlxsw_sp_rif * 5979 mlxsw_sp_rif_create(struct mlxsw_sp *mlxsw_sp, 5980 const struct mlxsw_sp_rif_params *params, 5981 struct netlink_ext_ack *extack) 5982 { 5983 u32 tb_id = l3mdev_fib_table(params->dev); 5984 const struct mlxsw_sp_rif_ops *ops; 5985 struct mlxsw_sp_fid *fid = NULL; 5986 enum mlxsw_sp_rif_type type; 5987 struct mlxsw_sp_rif *rif; 5988 struct mlxsw_sp_vr *vr; 5989 u16 rif_index; 5990 int err; 5991 5992 type = mlxsw_sp_dev_rif_type(mlxsw_sp, params->dev); 5993 ops = mlxsw_sp->router->rif_ops_arr[type]; 5994 5995 vr = mlxsw_sp_vr_get(mlxsw_sp, tb_id ? : RT_TABLE_MAIN, extack); 5996 if (IS_ERR(vr)) 5997 return ERR_CAST(vr); 5998 vr->rif_count++; 5999 6000 err = mlxsw_sp_rif_index_alloc(mlxsw_sp, &rif_index); 6001 if (err) { 6002 NL_SET_ERR_MSG(extack, "spectrum: Exceeded number of supported router interfaces"); 6003 goto err_rif_index_alloc; 6004 } 6005 6006 rif = mlxsw_sp_rif_alloc(ops->rif_size, rif_index, vr->id, params->dev); 6007 if (!rif) { 6008 err = -ENOMEM; 6009 goto err_rif_alloc; 6010 } 6011 rif->mlxsw_sp = mlxsw_sp; 6012 rif->ops = ops; 6013 6014 if (ops->fid_get) { 6015 fid = ops->fid_get(rif); 6016 if (IS_ERR(fid)) { 6017 err = PTR_ERR(fid); 6018 goto err_fid_get; 6019 } 6020 rif->fid = fid; 6021 } 6022 6023 if (ops->setup) 6024 ops->setup(rif, params); 6025 6026 err = ops->configure(rif); 6027 if (err) 6028 goto err_configure; 6029 6030 err = mlxsw_sp_mr_rif_add(vr->mr4_table, rif); 6031 if (err) 6032 goto err_mr_rif_add; 6033 6034 mlxsw_sp_rif_counters_alloc(rif); 6035 mlxsw_sp->router->rifs[rif_index] = rif; 6036 6037 return rif; 6038 6039 err_mr_rif_add: 6040 ops->deconfigure(rif); 6041 err_configure: 6042 if (fid) 6043 mlxsw_sp_fid_put(fid); 6044 err_fid_get: 6045 kfree(rif); 6046 err_rif_alloc: 6047 err_rif_index_alloc: 6048 vr->rif_count--; 6049 mlxsw_sp_vr_put(vr); 6050 return ERR_PTR(err); 6051 } 6052 6053 void mlxsw_sp_rif_destroy(struct mlxsw_sp_rif *rif) 6054 { 6055 const struct mlxsw_sp_rif_ops *ops = rif->ops; 6056 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 6057 struct mlxsw_sp_fid *fid = rif->fid; 6058 struct mlxsw_sp_vr *vr; 6059 6060 mlxsw_sp_router_rif_gone_sync(mlxsw_sp, rif); 6061 vr = &mlxsw_sp->router->vrs[rif->vr_id]; 6062 6063 mlxsw_sp->router->rifs[rif->rif_index] = NULL; 6064 mlxsw_sp_rif_counters_free(rif); 6065 mlxsw_sp_mr_rif_del(vr->mr4_table, rif); 6066 ops->deconfigure(rif); 6067 if (fid) 6068 /* Loopback RIFs are not associated with a FID. */ 6069 mlxsw_sp_fid_put(fid); 6070 kfree(rif); 6071 vr->rif_count--; 6072 mlxsw_sp_vr_put(vr); 6073 } 6074 6075 static void 6076 mlxsw_sp_rif_subport_params_init(struct mlxsw_sp_rif_params *params, 6077 struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan) 6078 { 6079 struct mlxsw_sp_port *mlxsw_sp_port = mlxsw_sp_port_vlan->mlxsw_sp_port; 6080 6081 params->vid = mlxsw_sp_port_vlan->vid; 6082 params->lag = mlxsw_sp_port->lagged; 6083 if (params->lag) 6084 params->lag_id = mlxsw_sp_port->lag_id; 6085 else 6086 params->system_port = mlxsw_sp_port->local_port; 6087 } 6088 6089 static int 6090 mlxsw_sp_port_vlan_router_join(struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan, 6091 struct net_device *l3_dev, 6092 struct netlink_ext_ack *extack) 6093 { 6094 struct mlxsw_sp_port *mlxsw_sp_port = mlxsw_sp_port_vlan->mlxsw_sp_port; 6095 struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp; 6096 u16 vid = mlxsw_sp_port_vlan->vid; 6097 struct mlxsw_sp_rif *rif; 6098 struct mlxsw_sp_fid *fid; 6099 int err; 6100 6101 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, l3_dev); 6102 if (!rif) { 6103 struct mlxsw_sp_rif_params params = { 6104 .dev = l3_dev, 6105 }; 6106 6107 mlxsw_sp_rif_subport_params_init(¶ms, mlxsw_sp_port_vlan); 6108 rif = mlxsw_sp_rif_create(mlxsw_sp, ¶ms, extack); 6109 if (IS_ERR(rif)) 6110 return PTR_ERR(rif); 6111 } 6112 6113 /* FID was already created, just take a reference */ 6114 fid = rif->ops->fid_get(rif); 6115 err = mlxsw_sp_fid_port_vid_map(fid, mlxsw_sp_port, vid); 6116 if (err) 6117 goto err_fid_port_vid_map; 6118 6119 err = mlxsw_sp_port_vid_learning_set(mlxsw_sp_port, vid, false); 6120 if (err) 6121 goto err_port_vid_learning_set; 6122 6123 err = mlxsw_sp_port_vid_stp_set(mlxsw_sp_port, vid, 6124 BR_STATE_FORWARDING); 6125 if (err) 6126 goto err_port_vid_stp_set; 6127 6128 mlxsw_sp_port_vlan->fid = fid; 6129 6130 return 0; 6131 6132 err_port_vid_stp_set: 6133 mlxsw_sp_port_vid_learning_set(mlxsw_sp_port, vid, true); 6134 err_port_vid_learning_set: 6135 mlxsw_sp_fid_port_vid_unmap(fid, mlxsw_sp_port, vid); 6136 err_fid_port_vid_map: 6137 mlxsw_sp_fid_put(fid); 6138 return err; 6139 } 6140 6141 void 6142 mlxsw_sp_port_vlan_router_leave(struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan) 6143 { 6144 struct mlxsw_sp_port *mlxsw_sp_port = mlxsw_sp_port_vlan->mlxsw_sp_port; 6145 struct mlxsw_sp_fid *fid = mlxsw_sp_port_vlan->fid; 6146 u16 vid = mlxsw_sp_port_vlan->vid; 6147 6148 if (WARN_ON(mlxsw_sp_fid_type(fid) != MLXSW_SP_FID_TYPE_RFID)) 6149 return; 6150 6151 mlxsw_sp_port_vlan->fid = NULL; 6152 mlxsw_sp_port_vid_stp_set(mlxsw_sp_port, vid, BR_STATE_BLOCKING); 6153 mlxsw_sp_port_vid_learning_set(mlxsw_sp_port, vid, true); 6154 mlxsw_sp_fid_port_vid_unmap(fid, mlxsw_sp_port, vid); 6155 /* If router port holds the last reference on the rFID, then the 6156 * associated Sub-port RIF will be destroyed. 6157 */ 6158 mlxsw_sp_fid_put(fid); 6159 } 6160 6161 static int mlxsw_sp_inetaddr_port_vlan_event(struct net_device *l3_dev, 6162 struct net_device *port_dev, 6163 unsigned long event, u16 vid, 6164 struct netlink_ext_ack *extack) 6165 { 6166 struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(port_dev); 6167 struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan; 6168 6169 mlxsw_sp_port_vlan = mlxsw_sp_port_vlan_find_by_vid(mlxsw_sp_port, vid); 6170 if (WARN_ON(!mlxsw_sp_port_vlan)) 6171 return -EINVAL; 6172 6173 switch (event) { 6174 case NETDEV_UP: 6175 return mlxsw_sp_port_vlan_router_join(mlxsw_sp_port_vlan, 6176 l3_dev, extack); 6177 case NETDEV_DOWN: 6178 mlxsw_sp_port_vlan_router_leave(mlxsw_sp_port_vlan); 6179 break; 6180 } 6181 6182 return 0; 6183 } 6184 6185 static int mlxsw_sp_inetaddr_port_event(struct net_device *port_dev, 6186 unsigned long event, 6187 struct netlink_ext_ack *extack) 6188 { 6189 if (netif_is_bridge_port(port_dev) || 6190 netif_is_lag_port(port_dev) || 6191 netif_is_ovs_port(port_dev)) 6192 return 0; 6193 6194 return mlxsw_sp_inetaddr_port_vlan_event(port_dev, port_dev, event, 1, 6195 extack); 6196 } 6197 6198 static int __mlxsw_sp_inetaddr_lag_event(struct net_device *l3_dev, 6199 struct net_device *lag_dev, 6200 unsigned long event, u16 vid, 6201 struct netlink_ext_ack *extack) 6202 { 6203 struct net_device *port_dev; 6204 struct list_head *iter; 6205 int err; 6206 6207 netdev_for_each_lower_dev(lag_dev, port_dev, iter) { 6208 if (mlxsw_sp_port_dev_check(port_dev)) { 6209 err = mlxsw_sp_inetaddr_port_vlan_event(l3_dev, 6210 port_dev, 6211 event, vid, 6212 extack); 6213 if (err) 6214 return err; 6215 } 6216 } 6217 6218 return 0; 6219 } 6220 6221 static int mlxsw_sp_inetaddr_lag_event(struct net_device *lag_dev, 6222 unsigned long event, 6223 struct netlink_ext_ack *extack) 6224 { 6225 if (netif_is_bridge_port(lag_dev)) 6226 return 0; 6227 6228 return __mlxsw_sp_inetaddr_lag_event(lag_dev, lag_dev, event, 1, 6229 extack); 6230 } 6231 6232 static int mlxsw_sp_inetaddr_bridge_event(struct net_device *l3_dev, 6233 unsigned long event, 6234 struct netlink_ext_ack *extack) 6235 { 6236 struct mlxsw_sp *mlxsw_sp = mlxsw_sp_lower_get(l3_dev); 6237 struct mlxsw_sp_rif_params params = { 6238 .dev = l3_dev, 6239 }; 6240 struct mlxsw_sp_rif *rif; 6241 6242 switch (event) { 6243 case NETDEV_UP: 6244 rif = mlxsw_sp_rif_create(mlxsw_sp, ¶ms, extack); 6245 if (IS_ERR(rif)) 6246 return PTR_ERR(rif); 6247 break; 6248 case NETDEV_DOWN: 6249 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, l3_dev); 6250 mlxsw_sp_rif_destroy(rif); 6251 break; 6252 } 6253 6254 return 0; 6255 } 6256 6257 static int mlxsw_sp_inetaddr_vlan_event(struct net_device *vlan_dev, 6258 unsigned long event, 6259 struct netlink_ext_ack *extack) 6260 { 6261 struct net_device *real_dev = vlan_dev_real_dev(vlan_dev); 6262 u16 vid = vlan_dev_vlan_id(vlan_dev); 6263 6264 if (netif_is_bridge_port(vlan_dev)) 6265 return 0; 6266 6267 if (mlxsw_sp_port_dev_check(real_dev)) 6268 return mlxsw_sp_inetaddr_port_vlan_event(vlan_dev, real_dev, 6269 event, vid, extack); 6270 else if (netif_is_lag_master(real_dev)) 6271 return __mlxsw_sp_inetaddr_lag_event(vlan_dev, real_dev, event, 6272 vid, extack); 6273 else if (netif_is_bridge_master(real_dev) && br_vlan_enabled(real_dev)) 6274 return mlxsw_sp_inetaddr_bridge_event(vlan_dev, event, extack); 6275 6276 return 0; 6277 } 6278 6279 static int __mlxsw_sp_inetaddr_event(struct net_device *dev, 6280 unsigned long event, 6281 struct netlink_ext_ack *extack) 6282 { 6283 if (mlxsw_sp_port_dev_check(dev)) 6284 return mlxsw_sp_inetaddr_port_event(dev, event, extack); 6285 else if (netif_is_lag_master(dev)) 6286 return mlxsw_sp_inetaddr_lag_event(dev, event, extack); 6287 else if (netif_is_bridge_master(dev)) 6288 return mlxsw_sp_inetaddr_bridge_event(dev, event, extack); 6289 else if (is_vlan_dev(dev)) 6290 return mlxsw_sp_inetaddr_vlan_event(dev, event, extack); 6291 else 6292 return 0; 6293 } 6294 6295 int mlxsw_sp_inetaddr_event(struct notifier_block *unused, 6296 unsigned long event, void *ptr) 6297 { 6298 struct in_ifaddr *ifa = (struct in_ifaddr *) ptr; 6299 struct net_device *dev = ifa->ifa_dev->dev; 6300 struct mlxsw_sp *mlxsw_sp; 6301 struct mlxsw_sp_rif *rif; 6302 int err = 0; 6303 6304 /* NETDEV_UP event is handled by mlxsw_sp_inetaddr_valid_event */ 6305 if (event == NETDEV_UP) 6306 goto out; 6307 6308 mlxsw_sp = mlxsw_sp_lower_get(dev); 6309 if (!mlxsw_sp) 6310 goto out; 6311 6312 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); 6313 if (!mlxsw_sp_rif_should_config(rif, dev, event)) 6314 goto out; 6315 6316 err = __mlxsw_sp_inetaddr_event(dev, event, NULL); 6317 out: 6318 return notifier_from_errno(err); 6319 } 6320 6321 int mlxsw_sp_inetaddr_valid_event(struct notifier_block *unused, 6322 unsigned long event, void *ptr) 6323 { 6324 struct in_validator_info *ivi = (struct in_validator_info *) ptr; 6325 struct net_device *dev = ivi->ivi_dev->dev; 6326 struct mlxsw_sp *mlxsw_sp; 6327 struct mlxsw_sp_rif *rif; 6328 int err = 0; 6329 6330 mlxsw_sp = mlxsw_sp_lower_get(dev); 6331 if (!mlxsw_sp) 6332 goto out; 6333 6334 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); 6335 if (!mlxsw_sp_rif_should_config(rif, dev, event)) 6336 goto out; 6337 6338 err = __mlxsw_sp_inetaddr_event(dev, event, ivi->extack); 6339 out: 6340 return notifier_from_errno(err); 6341 } 6342 6343 struct mlxsw_sp_inet6addr_event_work { 6344 struct work_struct work; 6345 struct net_device *dev; 6346 unsigned long event; 6347 }; 6348 6349 static void mlxsw_sp_inet6addr_event_work(struct work_struct *work) 6350 { 6351 struct mlxsw_sp_inet6addr_event_work *inet6addr_work = 6352 container_of(work, struct mlxsw_sp_inet6addr_event_work, work); 6353 struct net_device *dev = inet6addr_work->dev; 6354 unsigned long event = inet6addr_work->event; 6355 struct mlxsw_sp *mlxsw_sp; 6356 struct mlxsw_sp_rif *rif; 6357 6358 rtnl_lock(); 6359 mlxsw_sp = mlxsw_sp_lower_get(dev); 6360 if (!mlxsw_sp) 6361 goto out; 6362 6363 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); 6364 if (!mlxsw_sp_rif_should_config(rif, dev, event)) 6365 goto out; 6366 6367 __mlxsw_sp_inetaddr_event(dev, event, NULL); 6368 out: 6369 rtnl_unlock(); 6370 dev_put(dev); 6371 kfree(inet6addr_work); 6372 } 6373 6374 /* Called with rcu_read_lock() */ 6375 int mlxsw_sp_inet6addr_event(struct notifier_block *unused, 6376 unsigned long event, void *ptr) 6377 { 6378 struct inet6_ifaddr *if6 = (struct inet6_ifaddr *) ptr; 6379 struct mlxsw_sp_inet6addr_event_work *inet6addr_work; 6380 struct net_device *dev = if6->idev->dev; 6381 6382 /* NETDEV_UP event is handled by mlxsw_sp_inet6addr_valid_event */ 6383 if (event == NETDEV_UP) 6384 return NOTIFY_DONE; 6385 6386 if (!mlxsw_sp_port_dev_lower_find_rcu(dev)) 6387 return NOTIFY_DONE; 6388 6389 inet6addr_work = kzalloc(sizeof(*inet6addr_work), GFP_ATOMIC); 6390 if (!inet6addr_work) 6391 return NOTIFY_BAD; 6392 6393 INIT_WORK(&inet6addr_work->work, mlxsw_sp_inet6addr_event_work); 6394 inet6addr_work->dev = dev; 6395 inet6addr_work->event = event; 6396 dev_hold(dev); 6397 mlxsw_core_schedule_work(&inet6addr_work->work); 6398 6399 return NOTIFY_DONE; 6400 } 6401 6402 int mlxsw_sp_inet6addr_valid_event(struct notifier_block *unused, 6403 unsigned long event, void *ptr) 6404 { 6405 struct in6_validator_info *i6vi = (struct in6_validator_info *) ptr; 6406 struct net_device *dev = i6vi->i6vi_dev->dev; 6407 struct mlxsw_sp *mlxsw_sp; 6408 struct mlxsw_sp_rif *rif; 6409 int err = 0; 6410 6411 mlxsw_sp = mlxsw_sp_lower_get(dev); 6412 if (!mlxsw_sp) 6413 goto out; 6414 6415 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); 6416 if (!mlxsw_sp_rif_should_config(rif, dev, event)) 6417 goto out; 6418 6419 err = __mlxsw_sp_inetaddr_event(dev, event, i6vi->extack); 6420 out: 6421 return notifier_from_errno(err); 6422 } 6423 6424 static int mlxsw_sp_rif_edit(struct mlxsw_sp *mlxsw_sp, u16 rif_index, 6425 const char *mac, int mtu) 6426 { 6427 char ritr_pl[MLXSW_REG_RITR_LEN]; 6428 int err; 6429 6430 mlxsw_reg_ritr_rif_pack(ritr_pl, rif_index); 6431 err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 6432 if (err) 6433 return err; 6434 6435 mlxsw_reg_ritr_mtu_set(ritr_pl, mtu); 6436 mlxsw_reg_ritr_if_mac_memcpy_to(ritr_pl, mac); 6437 mlxsw_reg_ritr_op_set(ritr_pl, MLXSW_REG_RITR_RIF_CREATE); 6438 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 6439 } 6440 6441 int mlxsw_sp_netdevice_router_port_event(struct net_device *dev) 6442 { 6443 struct mlxsw_sp *mlxsw_sp; 6444 struct mlxsw_sp_rif *rif; 6445 u16 fid_index; 6446 int err; 6447 6448 mlxsw_sp = mlxsw_sp_lower_get(dev); 6449 if (!mlxsw_sp) 6450 return 0; 6451 6452 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev); 6453 if (!rif) 6454 return 0; 6455 fid_index = mlxsw_sp_fid_index(rif->fid); 6456 6457 err = mlxsw_sp_rif_fdb_op(mlxsw_sp, rif->addr, fid_index, false); 6458 if (err) 6459 return err; 6460 6461 err = mlxsw_sp_rif_edit(mlxsw_sp, rif->rif_index, dev->dev_addr, 6462 dev->mtu); 6463 if (err) 6464 goto err_rif_edit; 6465 6466 err = mlxsw_sp_rif_fdb_op(mlxsw_sp, dev->dev_addr, fid_index, true); 6467 if (err) 6468 goto err_rif_fdb_op; 6469 6470 if (rif->mtu != dev->mtu) { 6471 struct mlxsw_sp_vr *vr; 6472 6473 /* The RIF is relevant only to its mr_table instance, as unlike 6474 * unicast routing, in multicast routing a RIF cannot be shared 6475 * between several multicast routing tables. 6476 */ 6477 vr = &mlxsw_sp->router->vrs[rif->vr_id]; 6478 mlxsw_sp_mr_rif_mtu_update(vr->mr4_table, rif, dev->mtu); 6479 } 6480 6481 ether_addr_copy(rif->addr, dev->dev_addr); 6482 rif->mtu = dev->mtu; 6483 6484 netdev_dbg(dev, "Updated RIF=%d\n", rif->rif_index); 6485 6486 return 0; 6487 6488 err_rif_fdb_op: 6489 mlxsw_sp_rif_edit(mlxsw_sp, rif->rif_index, rif->addr, rif->mtu); 6490 err_rif_edit: 6491 mlxsw_sp_rif_fdb_op(mlxsw_sp, rif->addr, fid_index, true); 6492 return err; 6493 } 6494 6495 static int mlxsw_sp_port_vrf_join(struct mlxsw_sp *mlxsw_sp, 6496 struct net_device *l3_dev, 6497 struct netlink_ext_ack *extack) 6498 { 6499 struct mlxsw_sp_rif *rif; 6500 6501 /* If netdev is already associated with a RIF, then we need to 6502 * destroy it and create a new one with the new virtual router ID. 6503 */ 6504 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, l3_dev); 6505 if (rif) 6506 __mlxsw_sp_inetaddr_event(l3_dev, NETDEV_DOWN, extack); 6507 6508 return __mlxsw_sp_inetaddr_event(l3_dev, NETDEV_UP, extack); 6509 } 6510 6511 static void mlxsw_sp_port_vrf_leave(struct mlxsw_sp *mlxsw_sp, 6512 struct net_device *l3_dev) 6513 { 6514 struct mlxsw_sp_rif *rif; 6515 6516 rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, l3_dev); 6517 if (!rif) 6518 return; 6519 __mlxsw_sp_inetaddr_event(l3_dev, NETDEV_DOWN, NULL); 6520 } 6521 6522 int mlxsw_sp_netdevice_vrf_event(struct net_device *l3_dev, unsigned long event, 6523 struct netdev_notifier_changeupper_info *info) 6524 { 6525 struct mlxsw_sp *mlxsw_sp = mlxsw_sp_lower_get(l3_dev); 6526 int err = 0; 6527 6528 if (!mlxsw_sp) 6529 return 0; 6530 6531 switch (event) { 6532 case NETDEV_PRECHANGEUPPER: 6533 return 0; 6534 case NETDEV_CHANGEUPPER: 6535 if (info->linking) { 6536 struct netlink_ext_ack *extack; 6537 6538 extack = netdev_notifier_info_to_extack(&info->info); 6539 err = mlxsw_sp_port_vrf_join(mlxsw_sp, l3_dev, extack); 6540 } else { 6541 mlxsw_sp_port_vrf_leave(mlxsw_sp, l3_dev); 6542 } 6543 break; 6544 } 6545 6546 return err; 6547 } 6548 6549 static struct mlxsw_sp_rif_subport * 6550 mlxsw_sp_rif_subport_rif(const struct mlxsw_sp_rif *rif) 6551 { 6552 return container_of(rif, struct mlxsw_sp_rif_subport, common); 6553 } 6554 6555 static void mlxsw_sp_rif_subport_setup(struct mlxsw_sp_rif *rif, 6556 const struct mlxsw_sp_rif_params *params) 6557 { 6558 struct mlxsw_sp_rif_subport *rif_subport; 6559 6560 rif_subport = mlxsw_sp_rif_subport_rif(rif); 6561 rif_subport->vid = params->vid; 6562 rif_subport->lag = params->lag; 6563 if (params->lag) 6564 rif_subport->lag_id = params->lag_id; 6565 else 6566 rif_subport->system_port = params->system_port; 6567 } 6568 6569 static int mlxsw_sp_rif_subport_op(struct mlxsw_sp_rif *rif, bool enable) 6570 { 6571 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 6572 struct mlxsw_sp_rif_subport *rif_subport; 6573 char ritr_pl[MLXSW_REG_RITR_LEN]; 6574 6575 rif_subport = mlxsw_sp_rif_subport_rif(rif); 6576 mlxsw_reg_ritr_pack(ritr_pl, enable, MLXSW_REG_RITR_SP_IF, 6577 rif->rif_index, rif->vr_id, rif->dev->mtu); 6578 mlxsw_reg_ritr_mac_pack(ritr_pl, rif->dev->dev_addr); 6579 mlxsw_reg_ritr_sp_if_pack(ritr_pl, rif_subport->lag, 6580 rif_subport->lag ? rif_subport->lag_id : 6581 rif_subport->system_port, 6582 rif_subport->vid); 6583 6584 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 6585 } 6586 6587 static int mlxsw_sp_rif_subport_configure(struct mlxsw_sp_rif *rif) 6588 { 6589 int err; 6590 6591 err = mlxsw_sp_rif_subport_op(rif, true); 6592 if (err) 6593 return err; 6594 6595 err = mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr, 6596 mlxsw_sp_fid_index(rif->fid), true); 6597 if (err) 6598 goto err_rif_fdb_op; 6599 6600 mlxsw_sp_fid_rif_set(rif->fid, rif); 6601 return 0; 6602 6603 err_rif_fdb_op: 6604 mlxsw_sp_rif_subport_op(rif, false); 6605 return err; 6606 } 6607 6608 static void mlxsw_sp_rif_subport_deconfigure(struct mlxsw_sp_rif *rif) 6609 { 6610 struct mlxsw_sp_fid *fid = rif->fid; 6611 6612 mlxsw_sp_fid_rif_set(fid, NULL); 6613 mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr, 6614 mlxsw_sp_fid_index(fid), false); 6615 mlxsw_sp_rif_subport_op(rif, false); 6616 } 6617 6618 static struct mlxsw_sp_fid * 6619 mlxsw_sp_rif_subport_fid_get(struct mlxsw_sp_rif *rif) 6620 { 6621 return mlxsw_sp_fid_rfid_get(rif->mlxsw_sp, rif->rif_index); 6622 } 6623 6624 static const struct mlxsw_sp_rif_ops mlxsw_sp_rif_subport_ops = { 6625 .type = MLXSW_SP_RIF_TYPE_SUBPORT, 6626 .rif_size = sizeof(struct mlxsw_sp_rif_subport), 6627 .setup = mlxsw_sp_rif_subport_setup, 6628 .configure = mlxsw_sp_rif_subport_configure, 6629 .deconfigure = mlxsw_sp_rif_subport_deconfigure, 6630 .fid_get = mlxsw_sp_rif_subport_fid_get, 6631 }; 6632 6633 static int mlxsw_sp_rif_vlan_fid_op(struct mlxsw_sp_rif *rif, 6634 enum mlxsw_reg_ritr_if_type type, 6635 u16 vid_fid, bool enable) 6636 { 6637 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 6638 char ritr_pl[MLXSW_REG_RITR_LEN]; 6639 6640 mlxsw_reg_ritr_pack(ritr_pl, enable, type, rif->rif_index, rif->vr_id, 6641 rif->dev->mtu); 6642 mlxsw_reg_ritr_mac_pack(ritr_pl, rif->dev->dev_addr); 6643 mlxsw_reg_ritr_fid_set(ritr_pl, type, vid_fid); 6644 6645 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 6646 } 6647 6648 u8 mlxsw_sp_router_port(const struct mlxsw_sp *mlxsw_sp) 6649 { 6650 return mlxsw_core_max_ports(mlxsw_sp->core) + 1; 6651 } 6652 6653 static int mlxsw_sp_rif_vlan_configure(struct mlxsw_sp_rif *rif) 6654 { 6655 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 6656 u16 vid = mlxsw_sp_fid_8021q_vid(rif->fid); 6657 int err; 6658 6659 err = mlxsw_sp_rif_vlan_fid_op(rif, MLXSW_REG_RITR_VLAN_IF, vid, true); 6660 if (err) 6661 return err; 6662 6663 err = mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_MC, 6664 mlxsw_sp_router_port(mlxsw_sp), true); 6665 if (err) 6666 goto err_fid_mc_flood_set; 6667 6668 err = mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_BC, 6669 mlxsw_sp_router_port(mlxsw_sp), true); 6670 if (err) 6671 goto err_fid_bc_flood_set; 6672 6673 err = mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr, 6674 mlxsw_sp_fid_index(rif->fid), true); 6675 if (err) 6676 goto err_rif_fdb_op; 6677 6678 mlxsw_sp_fid_rif_set(rif->fid, rif); 6679 return 0; 6680 6681 err_rif_fdb_op: 6682 mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_BC, 6683 mlxsw_sp_router_port(mlxsw_sp), false); 6684 err_fid_bc_flood_set: 6685 mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_MC, 6686 mlxsw_sp_router_port(mlxsw_sp), false); 6687 err_fid_mc_flood_set: 6688 mlxsw_sp_rif_vlan_fid_op(rif, MLXSW_REG_RITR_VLAN_IF, vid, false); 6689 return err; 6690 } 6691 6692 static void mlxsw_sp_rif_vlan_deconfigure(struct mlxsw_sp_rif *rif) 6693 { 6694 u16 vid = mlxsw_sp_fid_8021q_vid(rif->fid); 6695 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 6696 struct mlxsw_sp_fid *fid = rif->fid; 6697 6698 mlxsw_sp_fid_rif_set(fid, NULL); 6699 mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr, 6700 mlxsw_sp_fid_index(fid), false); 6701 mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_BC, 6702 mlxsw_sp_router_port(mlxsw_sp), false); 6703 mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_MC, 6704 mlxsw_sp_router_port(mlxsw_sp), false); 6705 mlxsw_sp_rif_vlan_fid_op(rif, MLXSW_REG_RITR_VLAN_IF, vid, false); 6706 } 6707 6708 static struct mlxsw_sp_fid * 6709 mlxsw_sp_rif_vlan_fid_get(struct mlxsw_sp_rif *rif) 6710 { 6711 u16 vid = is_vlan_dev(rif->dev) ? vlan_dev_vlan_id(rif->dev) : 1; 6712 6713 return mlxsw_sp_fid_8021q_get(rif->mlxsw_sp, vid); 6714 } 6715 6716 static const struct mlxsw_sp_rif_ops mlxsw_sp_rif_vlan_ops = { 6717 .type = MLXSW_SP_RIF_TYPE_VLAN, 6718 .rif_size = sizeof(struct mlxsw_sp_rif), 6719 .configure = mlxsw_sp_rif_vlan_configure, 6720 .deconfigure = mlxsw_sp_rif_vlan_deconfigure, 6721 .fid_get = mlxsw_sp_rif_vlan_fid_get, 6722 }; 6723 6724 static int mlxsw_sp_rif_fid_configure(struct mlxsw_sp_rif *rif) 6725 { 6726 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 6727 u16 fid_index = mlxsw_sp_fid_index(rif->fid); 6728 int err; 6729 6730 err = mlxsw_sp_rif_vlan_fid_op(rif, MLXSW_REG_RITR_FID_IF, fid_index, 6731 true); 6732 if (err) 6733 return err; 6734 6735 err = mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_MC, 6736 mlxsw_sp_router_port(mlxsw_sp), true); 6737 if (err) 6738 goto err_fid_mc_flood_set; 6739 6740 err = mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_BC, 6741 mlxsw_sp_router_port(mlxsw_sp), true); 6742 if (err) 6743 goto err_fid_bc_flood_set; 6744 6745 err = mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr, 6746 mlxsw_sp_fid_index(rif->fid), true); 6747 if (err) 6748 goto err_rif_fdb_op; 6749 6750 mlxsw_sp_fid_rif_set(rif->fid, rif); 6751 return 0; 6752 6753 err_rif_fdb_op: 6754 mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_BC, 6755 mlxsw_sp_router_port(mlxsw_sp), false); 6756 err_fid_bc_flood_set: 6757 mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_MC, 6758 mlxsw_sp_router_port(mlxsw_sp), false); 6759 err_fid_mc_flood_set: 6760 mlxsw_sp_rif_vlan_fid_op(rif, MLXSW_REG_RITR_FID_IF, fid_index, false); 6761 return err; 6762 } 6763 6764 static void mlxsw_sp_rif_fid_deconfigure(struct mlxsw_sp_rif *rif) 6765 { 6766 u16 fid_index = mlxsw_sp_fid_index(rif->fid); 6767 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 6768 struct mlxsw_sp_fid *fid = rif->fid; 6769 6770 mlxsw_sp_fid_rif_set(fid, NULL); 6771 mlxsw_sp_rif_fdb_op(rif->mlxsw_sp, rif->dev->dev_addr, 6772 mlxsw_sp_fid_index(fid), false); 6773 mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_BC, 6774 mlxsw_sp_router_port(mlxsw_sp), false); 6775 mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_MC, 6776 mlxsw_sp_router_port(mlxsw_sp), false); 6777 mlxsw_sp_rif_vlan_fid_op(rif, MLXSW_REG_RITR_FID_IF, fid_index, false); 6778 } 6779 6780 static struct mlxsw_sp_fid * 6781 mlxsw_sp_rif_fid_fid_get(struct mlxsw_sp_rif *rif) 6782 { 6783 return mlxsw_sp_fid_8021d_get(rif->mlxsw_sp, rif->dev->ifindex); 6784 } 6785 6786 static const struct mlxsw_sp_rif_ops mlxsw_sp_rif_fid_ops = { 6787 .type = MLXSW_SP_RIF_TYPE_FID, 6788 .rif_size = sizeof(struct mlxsw_sp_rif), 6789 .configure = mlxsw_sp_rif_fid_configure, 6790 .deconfigure = mlxsw_sp_rif_fid_deconfigure, 6791 .fid_get = mlxsw_sp_rif_fid_fid_get, 6792 }; 6793 6794 static struct mlxsw_sp_rif_ipip_lb * 6795 mlxsw_sp_rif_ipip_lb_rif(struct mlxsw_sp_rif *rif) 6796 { 6797 return container_of(rif, struct mlxsw_sp_rif_ipip_lb, common); 6798 } 6799 6800 static void 6801 mlxsw_sp_rif_ipip_lb_setup(struct mlxsw_sp_rif *rif, 6802 const struct mlxsw_sp_rif_params *params) 6803 { 6804 struct mlxsw_sp_rif_params_ipip_lb *params_lb; 6805 struct mlxsw_sp_rif_ipip_lb *rif_lb; 6806 6807 params_lb = container_of(params, struct mlxsw_sp_rif_params_ipip_lb, 6808 common); 6809 rif_lb = mlxsw_sp_rif_ipip_lb_rif(rif); 6810 rif_lb->lb_config = params_lb->lb_config; 6811 } 6812 6813 static int 6814 mlxsw_sp_rif_ipip_lb_op(struct mlxsw_sp_rif_ipip_lb *lb_rif, 6815 struct mlxsw_sp_vr *ul_vr, bool enable) 6816 { 6817 struct mlxsw_sp_rif_ipip_lb_config lb_cf = lb_rif->lb_config; 6818 struct mlxsw_sp_rif *rif = &lb_rif->common; 6819 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 6820 char ritr_pl[MLXSW_REG_RITR_LEN]; 6821 u32 saddr4; 6822 6823 switch (lb_cf.ul_protocol) { 6824 case MLXSW_SP_L3_PROTO_IPV4: 6825 saddr4 = be32_to_cpu(lb_cf.saddr.addr4); 6826 mlxsw_reg_ritr_pack(ritr_pl, enable, MLXSW_REG_RITR_LOOPBACK_IF, 6827 rif->rif_index, rif->vr_id, rif->dev->mtu); 6828 mlxsw_reg_ritr_loopback_ipip4_pack(ritr_pl, lb_cf.lb_ipipt, 6829 MLXSW_REG_RITR_LOOPBACK_IPIP_OPTIONS_GRE_KEY_PRESET, 6830 ul_vr->id, saddr4, lb_cf.okey); 6831 break; 6832 6833 case MLXSW_SP_L3_PROTO_IPV6: 6834 return -EAFNOSUPPORT; 6835 } 6836 6837 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl); 6838 } 6839 6840 static int 6841 mlxsw_sp_rif_ipip_lb_configure(struct mlxsw_sp_rif *rif) 6842 { 6843 struct mlxsw_sp_rif_ipip_lb *lb_rif = mlxsw_sp_rif_ipip_lb_rif(rif); 6844 u32 ul_tb_id = mlxsw_sp_ipip_dev_ul_tb_id(rif->dev); 6845 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 6846 struct mlxsw_sp_vr *ul_vr; 6847 int err; 6848 6849 ul_vr = mlxsw_sp_vr_get(mlxsw_sp, ul_tb_id, NULL); 6850 if (IS_ERR(ul_vr)) 6851 return PTR_ERR(ul_vr); 6852 6853 err = mlxsw_sp_rif_ipip_lb_op(lb_rif, ul_vr, true); 6854 if (err) 6855 goto err_loopback_op; 6856 6857 lb_rif->ul_vr_id = ul_vr->id; 6858 ++ul_vr->rif_count; 6859 return 0; 6860 6861 err_loopback_op: 6862 mlxsw_sp_vr_put(ul_vr); 6863 return err; 6864 } 6865 6866 static void mlxsw_sp_rif_ipip_lb_deconfigure(struct mlxsw_sp_rif *rif) 6867 { 6868 struct mlxsw_sp_rif_ipip_lb *lb_rif = mlxsw_sp_rif_ipip_lb_rif(rif); 6869 struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp; 6870 struct mlxsw_sp_vr *ul_vr; 6871 6872 ul_vr = &mlxsw_sp->router->vrs[lb_rif->ul_vr_id]; 6873 mlxsw_sp_rif_ipip_lb_op(lb_rif, ul_vr, false); 6874 6875 --ul_vr->rif_count; 6876 mlxsw_sp_vr_put(ul_vr); 6877 } 6878 6879 static const struct mlxsw_sp_rif_ops mlxsw_sp_rif_ipip_lb_ops = { 6880 .type = MLXSW_SP_RIF_TYPE_IPIP_LB, 6881 .rif_size = sizeof(struct mlxsw_sp_rif_ipip_lb), 6882 .setup = mlxsw_sp_rif_ipip_lb_setup, 6883 .configure = mlxsw_sp_rif_ipip_lb_configure, 6884 .deconfigure = mlxsw_sp_rif_ipip_lb_deconfigure, 6885 }; 6886 6887 static const struct mlxsw_sp_rif_ops *mlxsw_sp_rif_ops_arr[] = { 6888 [MLXSW_SP_RIF_TYPE_SUBPORT] = &mlxsw_sp_rif_subport_ops, 6889 [MLXSW_SP_RIF_TYPE_VLAN] = &mlxsw_sp_rif_vlan_ops, 6890 [MLXSW_SP_RIF_TYPE_FID] = &mlxsw_sp_rif_fid_ops, 6891 [MLXSW_SP_RIF_TYPE_IPIP_LB] = &mlxsw_sp_rif_ipip_lb_ops, 6892 }; 6893 6894 static int mlxsw_sp_rifs_init(struct mlxsw_sp *mlxsw_sp) 6895 { 6896 u64 max_rifs = MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS); 6897 6898 mlxsw_sp->router->rifs = kcalloc(max_rifs, 6899 sizeof(struct mlxsw_sp_rif *), 6900 GFP_KERNEL); 6901 if (!mlxsw_sp->router->rifs) 6902 return -ENOMEM; 6903 6904 mlxsw_sp->router->rif_ops_arr = mlxsw_sp_rif_ops_arr; 6905 6906 return 0; 6907 } 6908 6909 static void mlxsw_sp_rifs_fini(struct mlxsw_sp *mlxsw_sp) 6910 { 6911 int i; 6912 6913 for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS); i++) 6914 WARN_ON_ONCE(mlxsw_sp->router->rifs[i]); 6915 6916 kfree(mlxsw_sp->router->rifs); 6917 } 6918 6919 static int 6920 mlxsw_sp_ipip_config_tigcr(struct mlxsw_sp *mlxsw_sp) 6921 { 6922 char tigcr_pl[MLXSW_REG_TIGCR_LEN]; 6923 6924 mlxsw_reg_tigcr_pack(tigcr_pl, true, 0); 6925 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(tigcr), tigcr_pl); 6926 } 6927 6928 static int mlxsw_sp_ipips_init(struct mlxsw_sp *mlxsw_sp) 6929 { 6930 mlxsw_sp->router->ipip_ops_arr = mlxsw_sp_ipip_ops_arr; 6931 INIT_LIST_HEAD(&mlxsw_sp->router->ipip_list); 6932 return mlxsw_sp_ipip_config_tigcr(mlxsw_sp); 6933 } 6934 6935 static void mlxsw_sp_ipips_fini(struct mlxsw_sp *mlxsw_sp) 6936 { 6937 WARN_ON(!list_empty(&mlxsw_sp->router->ipip_list)); 6938 } 6939 6940 static void mlxsw_sp_router_fib_dump_flush(struct notifier_block *nb) 6941 { 6942 struct mlxsw_sp_router *router; 6943 6944 /* Flush pending FIB notifications and then flush the device's 6945 * table before requesting another dump. The FIB notification 6946 * block is unregistered, so no need to take RTNL. 6947 */ 6948 mlxsw_core_flush_owq(); 6949 router = container_of(nb, struct mlxsw_sp_router, fib_nb); 6950 mlxsw_sp_router_fib_flush(router->mlxsw_sp); 6951 } 6952 6953 #ifdef CONFIG_IP_ROUTE_MULTIPATH 6954 static void mlxsw_sp_mp_hash_header_set(char *recr2_pl, int header) 6955 { 6956 mlxsw_reg_recr2_outer_header_enables_set(recr2_pl, header, true); 6957 } 6958 6959 static void mlxsw_sp_mp_hash_field_set(char *recr2_pl, int field) 6960 { 6961 mlxsw_reg_recr2_outer_header_fields_enable_set(recr2_pl, field, true); 6962 } 6963 6964 static void mlxsw_sp_mp4_hash_init(char *recr2_pl) 6965 { 6966 bool only_l3 = !init_net.ipv4.sysctl_fib_multipath_hash_policy; 6967 6968 mlxsw_sp_mp_hash_header_set(recr2_pl, 6969 MLXSW_REG_RECR2_IPV4_EN_NOT_TCP_NOT_UDP); 6970 mlxsw_sp_mp_hash_header_set(recr2_pl, MLXSW_REG_RECR2_IPV4_EN_TCP_UDP); 6971 mlxsw_reg_recr2_ipv4_sip_enable(recr2_pl); 6972 mlxsw_reg_recr2_ipv4_dip_enable(recr2_pl); 6973 if (only_l3) 6974 return; 6975 mlxsw_sp_mp_hash_header_set(recr2_pl, MLXSW_REG_RECR2_TCP_UDP_EN_IPV4); 6976 mlxsw_sp_mp_hash_field_set(recr2_pl, MLXSW_REG_RECR2_IPV4_PROTOCOL); 6977 mlxsw_sp_mp_hash_field_set(recr2_pl, MLXSW_REG_RECR2_TCP_UDP_SPORT); 6978 mlxsw_sp_mp_hash_field_set(recr2_pl, MLXSW_REG_RECR2_TCP_UDP_DPORT); 6979 } 6980 6981 static void mlxsw_sp_mp6_hash_init(char *recr2_pl) 6982 { 6983 mlxsw_sp_mp_hash_header_set(recr2_pl, 6984 MLXSW_REG_RECR2_IPV6_EN_NOT_TCP_NOT_UDP); 6985 mlxsw_sp_mp_hash_header_set(recr2_pl, MLXSW_REG_RECR2_IPV6_EN_TCP_UDP); 6986 mlxsw_reg_recr2_ipv6_sip_enable(recr2_pl); 6987 mlxsw_reg_recr2_ipv6_dip_enable(recr2_pl); 6988 mlxsw_sp_mp_hash_field_set(recr2_pl, MLXSW_REG_RECR2_IPV6_FLOW_LABEL); 6989 mlxsw_sp_mp_hash_field_set(recr2_pl, MLXSW_REG_RECR2_IPV6_NEXT_HEADER); 6990 } 6991 6992 static int mlxsw_sp_mp_hash_init(struct mlxsw_sp *mlxsw_sp) 6993 { 6994 char recr2_pl[MLXSW_REG_RECR2_LEN]; 6995 u32 seed; 6996 6997 get_random_bytes(&seed, sizeof(seed)); 6998 mlxsw_reg_recr2_pack(recr2_pl, seed); 6999 mlxsw_sp_mp4_hash_init(recr2_pl); 7000 mlxsw_sp_mp6_hash_init(recr2_pl); 7001 7002 return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(recr2), recr2_pl); 7003 } 7004 #else 7005 static int mlxsw_sp_mp_hash_init(struct mlxsw_sp *mlxsw_sp) 7006 { 7007 return 0; 7008 } 7009 #endif 7010 7011 static int __mlxsw_sp_router_init(struct mlxsw_sp *mlxsw_sp) 7012 { 7013 char rgcr_pl[MLXSW_REG_RGCR_LEN]; 7014 u64 max_rifs; 7015 int err; 7016 7017 if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, MAX_RIFS)) 7018 return -EIO; 7019 max_rifs = MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS); 7020 7021 mlxsw_reg_rgcr_pack(rgcr_pl, true, true); 7022 mlxsw_reg_rgcr_max_router_interfaces_set(rgcr_pl, max_rifs); 7023 err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rgcr), rgcr_pl); 7024 if (err) 7025 return err; 7026 return 0; 7027 } 7028 7029 static void __mlxsw_sp_router_fini(struct mlxsw_sp *mlxsw_sp) 7030 { 7031 char rgcr_pl[MLXSW_REG_RGCR_LEN]; 7032 7033 mlxsw_reg_rgcr_pack(rgcr_pl, false, false); 7034 mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rgcr), rgcr_pl); 7035 } 7036 7037 int mlxsw_sp_router_init(struct mlxsw_sp *mlxsw_sp) 7038 { 7039 struct mlxsw_sp_router *router; 7040 int err; 7041 7042 router = kzalloc(sizeof(*mlxsw_sp->router), GFP_KERNEL); 7043 if (!router) 7044 return -ENOMEM; 7045 mlxsw_sp->router = router; 7046 router->mlxsw_sp = mlxsw_sp; 7047 7048 INIT_LIST_HEAD(&mlxsw_sp->router->nexthop_neighs_list); 7049 err = __mlxsw_sp_router_init(mlxsw_sp); 7050 if (err) 7051 goto err_router_init; 7052 7053 err = mlxsw_sp_rifs_init(mlxsw_sp); 7054 if (err) 7055 goto err_rifs_init; 7056 7057 err = mlxsw_sp_ipips_init(mlxsw_sp); 7058 if (err) 7059 goto err_ipips_init; 7060 7061 err = rhashtable_init(&mlxsw_sp->router->nexthop_ht, 7062 &mlxsw_sp_nexthop_ht_params); 7063 if (err) 7064 goto err_nexthop_ht_init; 7065 7066 err = rhashtable_init(&mlxsw_sp->router->nexthop_group_ht, 7067 &mlxsw_sp_nexthop_group_ht_params); 7068 if (err) 7069 goto err_nexthop_group_ht_init; 7070 7071 INIT_LIST_HEAD(&mlxsw_sp->router->nexthop_list); 7072 err = mlxsw_sp_lpm_init(mlxsw_sp); 7073 if (err) 7074 goto err_lpm_init; 7075 7076 err = mlxsw_sp_mr_init(mlxsw_sp, &mlxsw_sp_mr_tcam_ops); 7077 if (err) 7078 goto err_mr_init; 7079 7080 err = mlxsw_sp_vrs_init(mlxsw_sp); 7081 if (err) 7082 goto err_vrs_init; 7083 7084 err = mlxsw_sp_neigh_init(mlxsw_sp); 7085 if (err) 7086 goto err_neigh_init; 7087 7088 mlxsw_sp->router->netevent_nb.notifier_call = 7089 mlxsw_sp_router_netevent_event; 7090 err = register_netevent_notifier(&mlxsw_sp->router->netevent_nb); 7091 if (err) 7092 goto err_register_netevent_notifier; 7093 7094 err = mlxsw_sp_mp_hash_init(mlxsw_sp); 7095 if (err) 7096 goto err_mp_hash_init; 7097 7098 mlxsw_sp->router->fib_nb.notifier_call = mlxsw_sp_router_fib_event; 7099 err = register_fib_notifier(&mlxsw_sp->router->fib_nb, 7100 mlxsw_sp_router_fib_dump_flush); 7101 if (err) 7102 goto err_register_fib_notifier; 7103 7104 return 0; 7105 7106 err_register_fib_notifier: 7107 err_mp_hash_init: 7108 unregister_netevent_notifier(&mlxsw_sp->router->netevent_nb); 7109 err_register_netevent_notifier: 7110 mlxsw_sp_neigh_fini(mlxsw_sp); 7111 err_neigh_init: 7112 mlxsw_sp_vrs_fini(mlxsw_sp); 7113 err_vrs_init: 7114 mlxsw_sp_mr_fini(mlxsw_sp); 7115 err_mr_init: 7116 mlxsw_sp_lpm_fini(mlxsw_sp); 7117 err_lpm_init: 7118 rhashtable_destroy(&mlxsw_sp->router->nexthop_group_ht); 7119 err_nexthop_group_ht_init: 7120 rhashtable_destroy(&mlxsw_sp->router->nexthop_ht); 7121 err_nexthop_ht_init: 7122 mlxsw_sp_ipips_fini(mlxsw_sp); 7123 err_ipips_init: 7124 mlxsw_sp_rifs_fini(mlxsw_sp); 7125 err_rifs_init: 7126 __mlxsw_sp_router_fini(mlxsw_sp); 7127 err_router_init: 7128 kfree(mlxsw_sp->router); 7129 return err; 7130 } 7131 7132 void mlxsw_sp_router_fini(struct mlxsw_sp *mlxsw_sp) 7133 { 7134 unregister_fib_notifier(&mlxsw_sp->router->fib_nb); 7135 unregister_netevent_notifier(&mlxsw_sp->router->netevent_nb); 7136 mlxsw_sp_neigh_fini(mlxsw_sp); 7137 mlxsw_sp_vrs_fini(mlxsw_sp); 7138 mlxsw_sp_mr_fini(mlxsw_sp); 7139 mlxsw_sp_lpm_fini(mlxsw_sp); 7140 rhashtable_destroy(&mlxsw_sp->router->nexthop_group_ht); 7141 rhashtable_destroy(&mlxsw_sp->router->nexthop_ht); 7142 mlxsw_sp_ipips_fini(mlxsw_sp); 7143 mlxsw_sp_rifs_fini(mlxsw_sp); 7144 __mlxsw_sp_router_fini(mlxsw_sp); 7145 kfree(mlxsw_sp->router); 7146 } 7147