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 info->amsdu = path->mtk_wdma.amsdu; 115 116 return 0; 117 } 118 119 120 static int 121 mtk_flow_mangle_ports(const struct flow_action_entry *act, 122 struct mtk_flow_data *data) 123 { 124 u32 val = ntohl(act->mangle.val); 125 126 switch (act->mangle.offset) { 127 case 0: 128 if (act->mangle.mask == ~htonl(0xffff)) 129 data->dst_port = cpu_to_be16(val); 130 else 131 data->src_port = cpu_to_be16(val >> 16); 132 break; 133 case 2: 134 data->dst_port = cpu_to_be16(val); 135 break; 136 default: 137 return -EINVAL; 138 } 139 140 return 0; 141 } 142 143 static int 144 mtk_flow_mangle_ipv4(const struct flow_action_entry *act, 145 struct mtk_flow_data *data) 146 { 147 __be32 *dest; 148 149 switch (act->mangle.offset) { 150 case offsetof(struct iphdr, saddr): 151 dest = &data->v4.src_addr; 152 break; 153 case offsetof(struct iphdr, daddr): 154 dest = &data->v4.dst_addr; 155 break; 156 default: 157 return -EINVAL; 158 } 159 160 memcpy(dest, &act->mangle.val, sizeof(u32)); 161 162 return 0; 163 } 164 165 static int 166 mtk_flow_get_dsa_port(struct net_device **dev) 167 { 168 #if IS_ENABLED(CONFIG_NET_DSA) 169 struct dsa_port *dp; 170 171 dp = dsa_port_from_netdev(*dev); 172 if (IS_ERR(dp)) 173 return -ENODEV; 174 175 if (dp->cpu_dp->tag_ops->proto != DSA_TAG_PROTO_MTK) 176 return -ENODEV; 177 178 *dev = dsa_port_to_conduit(dp); 179 180 return dp->index; 181 #else 182 return -ENODEV; 183 #endif 184 } 185 186 static int 187 mtk_flow_set_output_device(struct mtk_eth *eth, struct mtk_foe_entry *foe, 188 struct net_device *dev, const u8 *dest_mac, 189 int *wed_index) 190 { 191 struct mtk_wdma_info info = {}; 192 int pse_port, dsa_port, queue; 193 194 if (mtk_flow_get_wdma_info(dev, dest_mac, &info) == 0) { 195 mtk_foe_entry_set_wdma(eth, foe, info.wdma_idx, info.queue, 196 info.bss, info.wcid, info.amsdu); 197 if (mtk_is_netsys_v2_or_greater(eth)) { 198 switch (info.wdma_idx) { 199 case 0: 200 pse_port = PSE_WDMA0_PORT; 201 break; 202 case 1: 203 pse_port = PSE_WDMA1_PORT; 204 break; 205 case 2: 206 pse_port = PSE_WDMA2_PORT; 207 break; 208 default: 209 return -EINVAL; 210 } 211 } else { 212 pse_port = 3; 213 } 214 *wed_index = info.wdma_idx; 215 goto out; 216 } 217 218 dsa_port = mtk_flow_get_dsa_port(&dev); 219 220 if (dev == eth->netdev[0]) 221 pse_port = PSE_GDM1_PORT; 222 else if (dev == eth->netdev[1]) 223 pse_port = PSE_GDM2_PORT; 224 else if (dev == eth->netdev[2]) 225 pse_port = PSE_GDM3_PORT; 226 else 227 return -EOPNOTSUPP; 228 229 if (dsa_port >= 0) { 230 mtk_foe_entry_set_dsa(eth, foe, dsa_port); 231 queue = 3 + dsa_port; 232 } else { 233 queue = pse_port - 1; 234 } 235 mtk_foe_entry_set_queue(eth, foe, queue); 236 237 out: 238 mtk_foe_entry_set_pse_port(eth, foe, pse_port); 239 240 return 0; 241 } 242 243 static int 244 mtk_flow_offload_replace(struct mtk_eth *eth, struct flow_cls_offload *f, 245 int ppe_index) 246 { 247 struct flow_rule *rule = flow_cls_offload_flow_rule(f); 248 struct flow_action_entry *act; 249 struct mtk_flow_data data = {}; 250 struct mtk_foe_entry foe; 251 struct net_device *odev = NULL; 252 struct mtk_flow_entry *entry; 253 int offload_type = 0; 254 int wed_index = -1; 255 u16 addr_type = 0; 256 u8 l4proto = 0; 257 int err = 0; 258 int i; 259 260 if (rhashtable_lookup(ð->flow_table, &f->cookie, mtk_flow_ht_params)) 261 return -EEXIST; 262 263 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_META)) { 264 struct flow_match_meta match; 265 266 flow_rule_match_meta(rule, &match); 267 } else { 268 return -EOPNOTSUPP; 269 } 270 271 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_CONTROL)) { 272 struct flow_match_control match; 273 274 flow_rule_match_control(rule, &match); 275 addr_type = match.key->addr_type; 276 } else { 277 return -EOPNOTSUPP; 278 } 279 280 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_BASIC)) { 281 struct flow_match_basic match; 282 283 flow_rule_match_basic(rule, &match); 284 l4proto = match.key->ip_proto; 285 } else { 286 return -EOPNOTSUPP; 287 } 288 289 switch (addr_type) { 290 case 0: 291 offload_type = MTK_PPE_PKT_TYPE_BRIDGE; 292 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ETH_ADDRS)) { 293 struct flow_match_eth_addrs match; 294 295 flow_rule_match_eth_addrs(rule, &match); 296 memcpy(data.eth.h_dest, match.key->dst, ETH_ALEN); 297 memcpy(data.eth.h_source, match.key->src, ETH_ALEN); 298 } else { 299 return -EOPNOTSUPP; 300 } 301 302 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_VLAN)) { 303 struct flow_match_vlan match; 304 305 flow_rule_match_vlan(rule, &match); 306 307 if (match.key->vlan_tpid != cpu_to_be16(ETH_P_8021Q)) 308 return -EOPNOTSUPP; 309 310 data.vlan_in = match.key->vlan_id; 311 } 312 break; 313 case FLOW_DISSECTOR_KEY_IPV4_ADDRS: 314 offload_type = MTK_PPE_PKT_TYPE_IPV4_HNAPT; 315 break; 316 case FLOW_DISSECTOR_KEY_IPV6_ADDRS: 317 offload_type = MTK_PPE_PKT_TYPE_IPV6_ROUTE_5T; 318 break; 319 default: 320 return -EOPNOTSUPP; 321 } 322 323 flow_action_for_each(i, act, &rule->action) { 324 switch (act->id) { 325 case FLOW_ACTION_MANGLE: 326 if (offload_type == MTK_PPE_PKT_TYPE_BRIDGE) 327 return -EOPNOTSUPP; 328 if (act->mangle.htype == FLOW_ACT_MANGLE_HDR_TYPE_ETH) 329 mtk_flow_offload_mangle_eth(act, &data.eth); 330 break; 331 case FLOW_ACTION_REDIRECT: 332 odev = act->dev; 333 break; 334 case FLOW_ACTION_CSUM: 335 break; 336 case FLOW_ACTION_VLAN_PUSH: 337 if (data.vlan.num == 1 || 338 act->vlan.proto != htons(ETH_P_8021Q)) 339 return -EOPNOTSUPP; 340 341 data.vlan.id = act->vlan.vid; 342 data.vlan.proto = act->vlan.proto; 343 data.vlan.num++; 344 break; 345 case FLOW_ACTION_VLAN_POP: 346 break; 347 case FLOW_ACTION_PPPOE_PUSH: 348 if (data.pppoe.num == 1) 349 return -EOPNOTSUPP; 350 351 data.pppoe.sid = act->pppoe.sid; 352 data.pppoe.num++; 353 break; 354 default: 355 return -EOPNOTSUPP; 356 } 357 } 358 359 if (!is_valid_ether_addr(data.eth.h_source) || 360 !is_valid_ether_addr(data.eth.h_dest)) 361 return -EINVAL; 362 363 err = mtk_foe_entry_prepare(eth, &foe, offload_type, l4proto, 0, 364 data.eth.h_source, data.eth.h_dest); 365 if (err) 366 return err; 367 368 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_PORTS)) { 369 struct flow_match_ports ports; 370 371 if (offload_type == MTK_PPE_PKT_TYPE_BRIDGE) 372 return -EOPNOTSUPP; 373 374 flow_rule_match_ports(rule, &ports); 375 data.src_port = ports.key->src; 376 data.dst_port = ports.key->dst; 377 } else if (offload_type != MTK_PPE_PKT_TYPE_BRIDGE) { 378 return -EOPNOTSUPP; 379 } 380 381 if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) { 382 struct flow_match_ipv4_addrs addrs; 383 384 flow_rule_match_ipv4_addrs(rule, &addrs); 385 386 data.v4.src_addr = addrs.key->src; 387 data.v4.dst_addr = addrs.key->dst; 388 389 mtk_flow_set_ipv4_addr(eth, &foe, &data, false); 390 } 391 392 if (addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS) { 393 struct flow_match_ipv6_addrs addrs; 394 395 flow_rule_match_ipv6_addrs(rule, &addrs); 396 397 data.v6.src_addr = addrs.key->src; 398 data.v6.dst_addr = addrs.key->dst; 399 400 mtk_flow_set_ipv6_addr(eth, &foe, &data); 401 } 402 403 flow_action_for_each(i, act, &rule->action) { 404 if (act->id != FLOW_ACTION_MANGLE) 405 continue; 406 407 if (offload_type == MTK_PPE_PKT_TYPE_BRIDGE) 408 return -EOPNOTSUPP; 409 410 switch (act->mangle.htype) { 411 case FLOW_ACT_MANGLE_HDR_TYPE_TCP: 412 case FLOW_ACT_MANGLE_HDR_TYPE_UDP: 413 err = mtk_flow_mangle_ports(act, &data); 414 break; 415 case FLOW_ACT_MANGLE_HDR_TYPE_IP4: 416 err = mtk_flow_mangle_ipv4(act, &data); 417 break; 418 case FLOW_ACT_MANGLE_HDR_TYPE_ETH: 419 /* handled earlier */ 420 break; 421 default: 422 return -EOPNOTSUPP; 423 } 424 425 if (err) 426 return err; 427 } 428 429 if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) { 430 err = mtk_flow_set_ipv4_addr(eth, &foe, &data, true); 431 if (err) 432 return err; 433 } 434 435 if (offload_type == MTK_PPE_PKT_TYPE_BRIDGE) 436 foe.bridge.vlan = data.vlan_in; 437 438 if (data.vlan.num == 1) { 439 if (data.vlan.proto != htons(ETH_P_8021Q)) 440 return -EOPNOTSUPP; 441 442 mtk_foe_entry_set_vlan(eth, &foe, data.vlan.id); 443 } 444 if (data.pppoe.num == 1) 445 mtk_foe_entry_set_pppoe(eth, &foe, data.pppoe.sid); 446 447 err = mtk_flow_set_output_device(eth, &foe, odev, data.eth.h_dest, 448 &wed_index); 449 if (err) 450 return err; 451 452 if (wed_index >= 0 && (err = mtk_wed_flow_add(wed_index)) < 0) 453 return err; 454 455 entry = kzalloc(sizeof(*entry), GFP_KERNEL); 456 if (!entry) 457 return -ENOMEM; 458 459 entry->cookie = f->cookie; 460 memcpy(&entry->data, &foe, sizeof(entry->data)); 461 entry->wed_index = wed_index; 462 entry->ppe_index = ppe_index; 463 464 err = mtk_foe_entry_commit(eth->ppe[entry->ppe_index], entry); 465 if (err < 0) 466 goto free; 467 468 err = rhashtable_insert_fast(ð->flow_table, &entry->node, 469 mtk_flow_ht_params); 470 if (err < 0) 471 goto clear; 472 473 return 0; 474 475 clear: 476 mtk_foe_entry_clear(eth->ppe[entry->ppe_index], entry); 477 free: 478 kfree(entry); 479 if (wed_index >= 0) 480 mtk_wed_flow_remove(wed_index); 481 return err; 482 } 483 484 static int 485 mtk_flow_offload_destroy(struct mtk_eth *eth, struct flow_cls_offload *f) 486 { 487 struct mtk_flow_entry *entry; 488 489 entry = rhashtable_lookup(ð->flow_table, &f->cookie, 490 mtk_flow_ht_params); 491 if (!entry) 492 return -ENOENT; 493 494 mtk_foe_entry_clear(eth->ppe[entry->ppe_index], entry); 495 rhashtable_remove_fast(ð->flow_table, &entry->node, 496 mtk_flow_ht_params); 497 if (entry->wed_index >= 0) 498 mtk_wed_flow_remove(entry->wed_index); 499 kfree(entry); 500 501 return 0; 502 } 503 504 static int 505 mtk_flow_offload_stats(struct mtk_eth *eth, struct flow_cls_offload *f) 506 { 507 struct mtk_flow_entry *entry; 508 struct mtk_foe_accounting diff; 509 u32 idle; 510 511 entry = rhashtable_lookup(ð->flow_table, &f->cookie, 512 mtk_flow_ht_params); 513 if (!entry) 514 return -ENOENT; 515 516 idle = mtk_foe_entry_idle_time(eth->ppe[entry->ppe_index], entry); 517 f->stats.lastused = jiffies - idle * HZ; 518 519 if (entry->hash != 0xFFFF && 520 mtk_foe_entry_get_mib(eth->ppe[entry->ppe_index], entry->hash, 521 &diff)) { 522 f->stats.pkts += diff.packets; 523 f->stats.bytes += diff.bytes; 524 } 525 526 return 0; 527 } 528 529 static DEFINE_MUTEX(mtk_flow_offload_mutex); 530 531 int mtk_flow_offload_cmd(struct mtk_eth *eth, struct flow_cls_offload *cls, 532 int ppe_index) 533 { 534 int err; 535 536 mutex_lock(&mtk_flow_offload_mutex); 537 switch (cls->command) { 538 case FLOW_CLS_REPLACE: 539 err = mtk_flow_offload_replace(eth, cls, ppe_index); 540 break; 541 case FLOW_CLS_DESTROY: 542 err = mtk_flow_offload_destroy(eth, cls); 543 break; 544 case FLOW_CLS_STATS: 545 err = mtk_flow_offload_stats(eth, cls); 546 break; 547 default: 548 err = -EOPNOTSUPP; 549 break; 550 } 551 mutex_unlock(&mtk_flow_offload_mutex); 552 553 return err; 554 } 555 556 static int 557 mtk_eth_setup_tc_block_cb(enum tc_setup_type type, void *type_data, void *cb_priv) 558 { 559 struct flow_cls_offload *cls = type_data; 560 struct net_device *dev = cb_priv; 561 struct mtk_mac *mac; 562 struct mtk_eth *eth; 563 564 mac = netdev_priv(dev); 565 eth = mac->hw; 566 567 if (!tc_can_offload(dev)) 568 return -EOPNOTSUPP; 569 570 if (type != TC_SETUP_CLSFLOWER) 571 return -EOPNOTSUPP; 572 573 return mtk_flow_offload_cmd(eth, cls, 0); 574 } 575 576 static int 577 mtk_eth_setup_tc_block(struct net_device *dev, struct flow_block_offload *f) 578 { 579 struct mtk_mac *mac = netdev_priv(dev); 580 struct mtk_eth *eth = mac->hw; 581 static LIST_HEAD(block_cb_list); 582 struct flow_block_cb *block_cb; 583 flow_setup_cb_t *cb; 584 585 if (!eth->soc->offload_version) 586 return -EOPNOTSUPP; 587 588 if (f->binder_type != FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS) 589 return -EOPNOTSUPP; 590 591 cb = mtk_eth_setup_tc_block_cb; 592 f->driver_block_list = &block_cb_list; 593 594 switch (f->command) { 595 case FLOW_BLOCK_BIND: 596 block_cb = flow_block_cb_lookup(f->block, cb, dev); 597 if (block_cb) { 598 flow_block_cb_incref(block_cb); 599 return 0; 600 } 601 block_cb = flow_block_cb_alloc(cb, dev, dev, NULL); 602 if (IS_ERR(block_cb)) 603 return PTR_ERR(block_cb); 604 605 flow_block_cb_incref(block_cb); 606 flow_block_cb_add(block_cb, f); 607 list_add_tail(&block_cb->driver_list, &block_cb_list); 608 return 0; 609 case FLOW_BLOCK_UNBIND: 610 block_cb = flow_block_cb_lookup(f->block, cb, dev); 611 if (!block_cb) 612 return -ENOENT; 613 614 if (!flow_block_cb_decref(block_cb)) { 615 flow_block_cb_remove(block_cb, f); 616 list_del(&block_cb->driver_list); 617 } 618 return 0; 619 default: 620 return -EOPNOTSUPP; 621 } 622 } 623 624 int mtk_eth_setup_tc(struct net_device *dev, enum tc_setup_type type, 625 void *type_data) 626 { 627 switch (type) { 628 case TC_SETUP_BLOCK: 629 case TC_SETUP_FT: 630 return mtk_eth_setup_tc_block(dev, type_data); 631 default: 632 return -EOPNOTSUPP; 633 } 634 } 635 636 int mtk_eth_offload_init(struct mtk_eth *eth) 637 { 638 return rhashtable_init(ð->flow_table, &mtk_flow_ht_params); 639 } 640