1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2020 Felix Fietkau <nbd@nbd.name> 4 */ 5 6 #include <linux/if_ether.h> 7 #include <linux/rhashtable.h> 8 #include <linux/ip.h> 9 #include <linux/ipv6.h> 10 #include <net/flow_offload.h> 11 #include <net/pkt_cls.h> 12 #include <net/dsa.h> 13 #include "mtk_eth_soc.h" 14 #include "mtk_wed.h" 15 16 struct mtk_flow_data { 17 struct ethhdr eth; 18 19 union { 20 struct { 21 __be32 src_addr; 22 __be32 dst_addr; 23 } v4; 24 25 struct { 26 struct in6_addr src_addr; 27 struct in6_addr dst_addr; 28 } v6; 29 }; 30 31 __be16 src_port; 32 __be16 dst_port; 33 34 u16 vlan_in; 35 36 struct { 37 u16 id; 38 __be16 proto; 39 u8 num; 40 } vlan; 41 struct { 42 u16 sid; 43 u8 num; 44 } pppoe; 45 }; 46 47 static const struct rhashtable_params mtk_flow_ht_params = { 48 .head_offset = offsetof(struct mtk_flow_entry, node), 49 .key_offset = offsetof(struct mtk_flow_entry, cookie), 50 .key_len = sizeof(unsigned long), 51 .automatic_shrinking = true, 52 }; 53 54 static int 55 mtk_flow_set_ipv4_addr(struct mtk_eth *eth, struct mtk_foe_entry *foe, 56 struct mtk_flow_data *data, bool egress) 57 { 58 return mtk_foe_entry_set_ipv4_tuple(eth, foe, egress, 59 data->v4.src_addr, data->src_port, 60 data->v4.dst_addr, data->dst_port); 61 } 62 63 static int 64 mtk_flow_set_ipv6_addr(struct mtk_eth *eth, struct mtk_foe_entry *foe, 65 struct mtk_flow_data *data) 66 { 67 return mtk_foe_entry_set_ipv6_tuple(eth, foe, 68 data->v6.src_addr.s6_addr32, data->src_port, 69 data->v6.dst_addr.s6_addr32, data->dst_port); 70 } 71 72 static void 73 mtk_flow_offload_mangle_eth(const struct flow_action_entry *act, void *eth) 74 { 75 void *dest = eth + act->mangle.offset; 76 const void *src = &act->mangle.val; 77 78 if (act->mangle.offset > 8) 79 return; 80 81 if (act->mangle.mask == 0xffff) { 82 src += 2; 83 dest += 2; 84 } 85 86 memcpy(dest, src, act->mangle.mask ? 2 : 4); 87 } 88 89 static int 90 mtk_flow_get_wdma_info(struct net_device *dev, const u8 *addr, struct mtk_wdma_info *info) 91 { 92 struct net_device_path_stack stack; 93 struct net_device_path *path; 94 int err; 95 96 if (!dev) 97 return -ENODEV; 98 99 if (!IS_ENABLED(CONFIG_NET_MEDIATEK_SOC_WED)) 100 return -1; 101 102 err = dev_fill_forward_path(dev, addr, &stack); 103 if (err) 104 return err; 105 106 path = &stack.path[stack.num_paths - 1]; 107 if (path->type != DEV_PATH_MTK_WDMA) 108 return -1; 109 110 info->wdma_idx = path->mtk_wdma.wdma_idx; 111 info->queue = path->mtk_wdma.queue; 112 info->bss = path->mtk_wdma.bss; 113 info->wcid = path->mtk_wdma.wcid; 114 115 return 0; 116 } 117 118 119 static int 120 mtk_flow_mangle_ports(const struct flow_action_entry *act, 121 struct mtk_flow_data *data) 122 { 123 u32 val = ntohl(act->mangle.val); 124 125 switch (act->mangle.offset) { 126 case 0: 127 if (act->mangle.mask == ~htonl(0xffff)) 128 data->dst_port = cpu_to_be16(val); 129 else 130 data->src_port = cpu_to_be16(val >> 16); 131 break; 132 case 2: 133 data->dst_port = cpu_to_be16(val); 134 break; 135 default: 136 return -EINVAL; 137 } 138 139 return 0; 140 } 141 142 static int 143 mtk_flow_mangle_ipv4(const struct flow_action_entry *act, 144 struct mtk_flow_data *data) 145 { 146 __be32 *dest; 147 148 switch (act->mangle.offset) { 149 case offsetof(struct iphdr, saddr): 150 dest = &data->v4.src_addr; 151 break; 152 case offsetof(struct iphdr, daddr): 153 dest = &data->v4.dst_addr; 154 break; 155 default: 156 return -EINVAL; 157 } 158 159 memcpy(dest, &act->mangle.val, sizeof(u32)); 160 161 return 0; 162 } 163 164 static int 165 mtk_flow_get_dsa_port(struct net_device **dev) 166 { 167 #if IS_ENABLED(CONFIG_NET_DSA) 168 struct dsa_port *dp; 169 170 dp = dsa_port_from_netdev(*dev); 171 if (IS_ERR(dp)) 172 return -ENODEV; 173 174 if (dp->cpu_dp->tag_ops->proto != DSA_TAG_PROTO_MTK) 175 return -ENODEV; 176 177 *dev = dsa_port_to_master(dp); 178 179 return dp->index; 180 #else 181 return -ENODEV; 182 #endif 183 } 184 185 static int 186 mtk_flow_set_output_device(struct mtk_eth *eth, struct mtk_foe_entry *foe, 187 struct net_device *dev, const u8 *dest_mac, 188 int *wed_index) 189 { 190 struct mtk_wdma_info info = {}; 191 int pse_port, dsa_port, queue; 192 193 if (mtk_flow_get_wdma_info(dev, dest_mac, &info) == 0) { 194 mtk_foe_entry_set_wdma(eth, foe, info.wdma_idx, info.queue, 195 info.bss, info.wcid); 196 if (MTK_HAS_CAPS(eth->soc->caps, MTK_NETSYS_V2)) { 197 switch (info.wdma_idx) { 198 case 0: 199 pse_port = 8; 200 break; 201 case 1: 202 pse_port = 9; 203 break; 204 default: 205 return -EINVAL; 206 } 207 } else { 208 pse_port = 3; 209 } 210 *wed_index = info.wdma_idx; 211 goto out; 212 } 213 214 dsa_port = mtk_flow_get_dsa_port(&dev); 215 216 if (dev == eth->netdev[0]) 217 pse_port = 1; 218 else if (dev == eth->netdev[1]) 219 pse_port = 2; 220 else 221 return -EOPNOTSUPP; 222 223 if (dsa_port >= 0) { 224 mtk_foe_entry_set_dsa(eth, foe, dsa_port); 225 queue = 3 + dsa_port; 226 } else { 227 queue = pse_port - 1; 228 } 229 mtk_foe_entry_set_queue(eth, foe, queue); 230 231 out: 232 mtk_foe_entry_set_pse_port(eth, foe, pse_port); 233 234 return 0; 235 } 236 237 static int 238 mtk_flow_offload_replace(struct mtk_eth *eth, struct flow_cls_offload *f, 239 int ppe_index) 240 { 241 struct flow_rule *rule = flow_cls_offload_flow_rule(f); 242 struct flow_action_entry *act; 243 struct mtk_flow_data data = {}; 244 struct mtk_foe_entry foe; 245 struct net_device *odev = NULL; 246 struct mtk_flow_entry *entry; 247 int offload_type = 0; 248 int wed_index = -1; 249 u16 addr_type = 0; 250 u8 l4proto = 0; 251 int err = 0; 252 int i; 253 254 if (rhashtable_lookup(ð->flow_table, &f->cookie, mtk_flow_ht_params)) 255 return -EEXIST; 256 257 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_META)) { 258 struct flow_match_meta match; 259 260 flow_rule_match_meta(rule, &match); 261 } else { 262 return -EOPNOTSUPP; 263 } 264 265 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_CONTROL)) { 266 struct flow_match_control match; 267 268 flow_rule_match_control(rule, &match); 269 addr_type = match.key->addr_type; 270 } else { 271 return -EOPNOTSUPP; 272 } 273 274 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_BASIC)) { 275 struct flow_match_basic match; 276 277 flow_rule_match_basic(rule, &match); 278 l4proto = match.key->ip_proto; 279 } else { 280 return -EOPNOTSUPP; 281 } 282 283 switch (addr_type) { 284 case 0: 285 offload_type = MTK_PPE_PKT_TYPE_BRIDGE; 286 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ETH_ADDRS)) { 287 struct flow_match_eth_addrs match; 288 289 flow_rule_match_eth_addrs(rule, &match); 290 memcpy(data.eth.h_dest, match.key->dst, ETH_ALEN); 291 memcpy(data.eth.h_source, match.key->src, ETH_ALEN); 292 } else { 293 return -EOPNOTSUPP; 294 } 295 296 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_VLAN)) { 297 struct flow_match_vlan match; 298 299 flow_rule_match_vlan(rule, &match); 300 301 if (match.key->vlan_tpid != cpu_to_be16(ETH_P_8021Q)) 302 return -EOPNOTSUPP; 303 304 data.vlan_in = match.key->vlan_id; 305 } 306 break; 307 case FLOW_DISSECTOR_KEY_IPV4_ADDRS: 308 offload_type = MTK_PPE_PKT_TYPE_IPV4_HNAPT; 309 break; 310 case FLOW_DISSECTOR_KEY_IPV6_ADDRS: 311 offload_type = MTK_PPE_PKT_TYPE_IPV6_ROUTE_5T; 312 break; 313 default: 314 return -EOPNOTSUPP; 315 } 316 317 flow_action_for_each(i, act, &rule->action) { 318 switch (act->id) { 319 case FLOW_ACTION_MANGLE: 320 if (offload_type == MTK_PPE_PKT_TYPE_BRIDGE) 321 return -EOPNOTSUPP; 322 if (act->mangle.htype == FLOW_ACT_MANGLE_HDR_TYPE_ETH) 323 mtk_flow_offload_mangle_eth(act, &data.eth); 324 break; 325 case FLOW_ACTION_REDIRECT: 326 odev = act->dev; 327 break; 328 case FLOW_ACTION_CSUM: 329 break; 330 case FLOW_ACTION_VLAN_PUSH: 331 if (data.vlan.num == 1 || 332 act->vlan.proto != htons(ETH_P_8021Q)) 333 return -EOPNOTSUPP; 334 335 data.vlan.id = act->vlan.vid; 336 data.vlan.proto = act->vlan.proto; 337 data.vlan.num++; 338 break; 339 case FLOW_ACTION_VLAN_POP: 340 break; 341 case FLOW_ACTION_PPPOE_PUSH: 342 if (data.pppoe.num == 1) 343 return -EOPNOTSUPP; 344 345 data.pppoe.sid = act->pppoe.sid; 346 data.pppoe.num++; 347 break; 348 default: 349 return -EOPNOTSUPP; 350 } 351 } 352 353 if (!is_valid_ether_addr(data.eth.h_source) || 354 !is_valid_ether_addr(data.eth.h_dest)) 355 return -EINVAL; 356 357 err = mtk_foe_entry_prepare(eth, &foe, offload_type, l4proto, 0, 358 data.eth.h_source, data.eth.h_dest); 359 if (err) 360 return err; 361 362 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_PORTS)) { 363 struct flow_match_ports ports; 364 365 if (offload_type == MTK_PPE_PKT_TYPE_BRIDGE) 366 return -EOPNOTSUPP; 367 368 flow_rule_match_ports(rule, &ports); 369 data.src_port = ports.key->src; 370 data.dst_port = ports.key->dst; 371 } else if (offload_type != MTK_PPE_PKT_TYPE_BRIDGE) { 372 return -EOPNOTSUPP; 373 } 374 375 if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) { 376 struct flow_match_ipv4_addrs addrs; 377 378 flow_rule_match_ipv4_addrs(rule, &addrs); 379 380 data.v4.src_addr = addrs.key->src; 381 data.v4.dst_addr = addrs.key->dst; 382 383 mtk_flow_set_ipv4_addr(eth, &foe, &data, false); 384 } 385 386 if (addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS) { 387 struct flow_match_ipv6_addrs addrs; 388 389 flow_rule_match_ipv6_addrs(rule, &addrs); 390 391 data.v6.src_addr = addrs.key->src; 392 data.v6.dst_addr = addrs.key->dst; 393 394 mtk_flow_set_ipv6_addr(eth, &foe, &data); 395 } 396 397 flow_action_for_each(i, act, &rule->action) { 398 if (act->id != FLOW_ACTION_MANGLE) 399 continue; 400 401 if (offload_type == MTK_PPE_PKT_TYPE_BRIDGE) 402 return -EOPNOTSUPP; 403 404 switch (act->mangle.htype) { 405 case FLOW_ACT_MANGLE_HDR_TYPE_TCP: 406 case FLOW_ACT_MANGLE_HDR_TYPE_UDP: 407 err = mtk_flow_mangle_ports(act, &data); 408 break; 409 case FLOW_ACT_MANGLE_HDR_TYPE_IP4: 410 err = mtk_flow_mangle_ipv4(act, &data); 411 break; 412 case FLOW_ACT_MANGLE_HDR_TYPE_ETH: 413 /* handled earlier */ 414 break; 415 default: 416 return -EOPNOTSUPP; 417 } 418 419 if (err) 420 return err; 421 } 422 423 if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) { 424 err = mtk_flow_set_ipv4_addr(eth, &foe, &data, true); 425 if (err) 426 return err; 427 } 428 429 if (offload_type == MTK_PPE_PKT_TYPE_BRIDGE) 430 foe.bridge.vlan = data.vlan_in; 431 432 if (data.vlan.num == 1) { 433 if (data.vlan.proto != htons(ETH_P_8021Q)) 434 return -EOPNOTSUPP; 435 436 mtk_foe_entry_set_vlan(eth, &foe, data.vlan.id); 437 } 438 if (data.pppoe.num == 1) 439 mtk_foe_entry_set_pppoe(eth, &foe, data.pppoe.sid); 440 441 err = mtk_flow_set_output_device(eth, &foe, odev, data.eth.h_dest, 442 &wed_index); 443 if (err) 444 return err; 445 446 if (wed_index >= 0 && (err = mtk_wed_flow_add(wed_index)) < 0) 447 return err; 448 449 entry = kzalloc(sizeof(*entry), GFP_KERNEL); 450 if (!entry) 451 return -ENOMEM; 452 453 entry->cookie = f->cookie; 454 memcpy(&entry->data, &foe, sizeof(entry->data)); 455 entry->wed_index = wed_index; 456 entry->ppe_index = ppe_index; 457 458 err = mtk_foe_entry_commit(eth->ppe[entry->ppe_index], entry); 459 if (err < 0) 460 goto free; 461 462 err = rhashtable_insert_fast(ð->flow_table, &entry->node, 463 mtk_flow_ht_params); 464 if (err < 0) 465 goto clear; 466 467 return 0; 468 469 clear: 470 mtk_foe_entry_clear(eth->ppe[entry->ppe_index], entry); 471 free: 472 kfree(entry); 473 if (wed_index >= 0) 474 mtk_wed_flow_remove(wed_index); 475 return err; 476 } 477 478 static int 479 mtk_flow_offload_destroy(struct mtk_eth *eth, struct flow_cls_offload *f) 480 { 481 struct mtk_flow_entry *entry; 482 483 entry = rhashtable_lookup(ð->flow_table, &f->cookie, 484 mtk_flow_ht_params); 485 if (!entry) 486 return -ENOENT; 487 488 mtk_foe_entry_clear(eth->ppe[entry->ppe_index], entry); 489 rhashtable_remove_fast(ð->flow_table, &entry->node, 490 mtk_flow_ht_params); 491 if (entry->wed_index >= 0) 492 mtk_wed_flow_remove(entry->wed_index); 493 kfree(entry); 494 495 return 0; 496 } 497 498 static int 499 mtk_flow_offload_stats(struct mtk_eth *eth, struct flow_cls_offload *f) 500 { 501 struct mtk_flow_entry *entry; 502 struct mtk_foe_accounting diff; 503 u32 idle; 504 505 entry = rhashtable_lookup(ð->flow_table, &f->cookie, 506 mtk_flow_ht_params); 507 if (!entry) 508 return -ENOENT; 509 510 idle = mtk_foe_entry_idle_time(eth->ppe[entry->ppe_index], entry); 511 f->stats.lastused = jiffies - idle * HZ; 512 513 if (entry->hash != 0xFFFF && 514 mtk_foe_entry_get_mib(eth->ppe[entry->ppe_index], entry->hash, 515 &diff)) { 516 f->stats.pkts += diff.packets; 517 f->stats.bytes += diff.bytes; 518 } 519 520 return 0; 521 } 522 523 static DEFINE_MUTEX(mtk_flow_offload_mutex); 524 525 int mtk_flow_offload_cmd(struct mtk_eth *eth, struct flow_cls_offload *cls, 526 int ppe_index) 527 { 528 int err; 529 530 mutex_lock(&mtk_flow_offload_mutex); 531 switch (cls->command) { 532 case FLOW_CLS_REPLACE: 533 err = mtk_flow_offload_replace(eth, cls, ppe_index); 534 break; 535 case FLOW_CLS_DESTROY: 536 err = mtk_flow_offload_destroy(eth, cls); 537 break; 538 case FLOW_CLS_STATS: 539 err = mtk_flow_offload_stats(eth, cls); 540 break; 541 default: 542 err = -EOPNOTSUPP; 543 break; 544 } 545 mutex_unlock(&mtk_flow_offload_mutex); 546 547 return err; 548 } 549 550 static int 551 mtk_eth_setup_tc_block_cb(enum tc_setup_type type, void *type_data, void *cb_priv) 552 { 553 struct flow_cls_offload *cls = type_data; 554 struct net_device *dev = cb_priv; 555 struct mtk_mac *mac; 556 struct mtk_eth *eth; 557 558 mac = netdev_priv(dev); 559 eth = mac->hw; 560 561 if (!tc_can_offload(dev)) 562 return -EOPNOTSUPP; 563 564 if (type != TC_SETUP_CLSFLOWER) 565 return -EOPNOTSUPP; 566 567 return mtk_flow_offload_cmd(eth, cls, 0); 568 } 569 570 static int 571 mtk_eth_setup_tc_block(struct net_device *dev, struct flow_block_offload *f) 572 { 573 struct mtk_mac *mac = netdev_priv(dev); 574 struct mtk_eth *eth = mac->hw; 575 static LIST_HEAD(block_cb_list); 576 struct flow_block_cb *block_cb; 577 flow_setup_cb_t *cb; 578 579 if (!eth->soc->offload_version) 580 return -EOPNOTSUPP; 581 582 if (f->binder_type != FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS) 583 return -EOPNOTSUPP; 584 585 cb = mtk_eth_setup_tc_block_cb; 586 f->driver_block_list = &block_cb_list; 587 588 switch (f->command) { 589 case FLOW_BLOCK_BIND: 590 block_cb = flow_block_cb_lookup(f->block, cb, dev); 591 if (block_cb) { 592 flow_block_cb_incref(block_cb); 593 return 0; 594 } 595 block_cb = flow_block_cb_alloc(cb, dev, dev, NULL); 596 if (IS_ERR(block_cb)) 597 return PTR_ERR(block_cb); 598 599 flow_block_cb_incref(block_cb); 600 flow_block_cb_add(block_cb, f); 601 list_add_tail(&block_cb->driver_list, &block_cb_list); 602 return 0; 603 case FLOW_BLOCK_UNBIND: 604 block_cb = flow_block_cb_lookup(f->block, cb, dev); 605 if (!block_cb) 606 return -ENOENT; 607 608 if (!flow_block_cb_decref(block_cb)) { 609 flow_block_cb_remove(block_cb, f); 610 list_del(&block_cb->driver_list); 611 } 612 return 0; 613 default: 614 return -EOPNOTSUPP; 615 } 616 } 617 618 int mtk_eth_setup_tc(struct net_device *dev, enum tc_setup_type type, 619 void *type_data) 620 { 621 switch (type) { 622 case TC_SETUP_BLOCK: 623 case TC_SETUP_FT: 624 return mtk_eth_setup_tc_block(dev, type_data); 625 default: 626 return -EOPNOTSUPP; 627 } 628 } 629 630 int mtk_eth_offload_init(struct mtk_eth *eth) 631 { 632 return rhashtable_init(ð->flow_table, &mtk_flow_ht_params); 633 } 634