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 { 240 struct flow_rule *rule = flow_cls_offload_flow_rule(f); 241 struct flow_action_entry *act; 242 struct mtk_flow_data data = {}; 243 struct mtk_foe_entry foe; 244 struct net_device *odev = NULL; 245 struct mtk_flow_entry *entry; 246 int offload_type = 0; 247 int wed_index = -1; 248 u16 addr_type = 0; 249 u8 l4proto = 0; 250 int err = 0; 251 int i; 252 253 if (rhashtable_lookup(ð->flow_table, &f->cookie, mtk_flow_ht_params)) 254 return -EEXIST; 255 256 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_META)) { 257 struct flow_match_meta match; 258 259 flow_rule_match_meta(rule, &match); 260 } else { 261 return -EOPNOTSUPP; 262 } 263 264 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_CONTROL)) { 265 struct flow_match_control match; 266 267 flow_rule_match_control(rule, &match); 268 addr_type = match.key->addr_type; 269 } else { 270 return -EOPNOTSUPP; 271 } 272 273 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_BASIC)) { 274 struct flow_match_basic match; 275 276 flow_rule_match_basic(rule, &match); 277 l4proto = match.key->ip_proto; 278 } else { 279 return -EOPNOTSUPP; 280 } 281 282 switch (addr_type) { 283 case 0: 284 offload_type = MTK_PPE_PKT_TYPE_BRIDGE; 285 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ETH_ADDRS)) { 286 struct flow_match_eth_addrs match; 287 288 flow_rule_match_eth_addrs(rule, &match); 289 memcpy(data.eth.h_dest, match.key->dst, ETH_ALEN); 290 memcpy(data.eth.h_source, match.key->src, ETH_ALEN); 291 } else { 292 return -EOPNOTSUPP; 293 } 294 295 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_VLAN)) { 296 struct flow_match_vlan match; 297 298 flow_rule_match_vlan(rule, &match); 299 300 if (match.key->vlan_tpid != cpu_to_be16(ETH_P_8021Q)) 301 return -EOPNOTSUPP; 302 303 data.vlan_in = match.key->vlan_id; 304 } 305 break; 306 case FLOW_DISSECTOR_KEY_IPV4_ADDRS: 307 offload_type = MTK_PPE_PKT_TYPE_IPV4_HNAPT; 308 break; 309 case FLOW_DISSECTOR_KEY_IPV6_ADDRS: 310 offload_type = MTK_PPE_PKT_TYPE_IPV6_ROUTE_5T; 311 break; 312 default: 313 return -EOPNOTSUPP; 314 } 315 316 flow_action_for_each(i, act, &rule->action) { 317 switch (act->id) { 318 case FLOW_ACTION_MANGLE: 319 if (offload_type == MTK_PPE_PKT_TYPE_BRIDGE) 320 return -EOPNOTSUPP; 321 if (act->mangle.htype == FLOW_ACT_MANGLE_HDR_TYPE_ETH) 322 mtk_flow_offload_mangle_eth(act, &data.eth); 323 break; 324 case FLOW_ACTION_REDIRECT: 325 odev = act->dev; 326 break; 327 case FLOW_ACTION_CSUM: 328 break; 329 case FLOW_ACTION_VLAN_PUSH: 330 if (data.vlan.num == 1 || 331 act->vlan.proto != htons(ETH_P_8021Q)) 332 return -EOPNOTSUPP; 333 334 data.vlan.id = act->vlan.vid; 335 data.vlan.proto = act->vlan.proto; 336 data.vlan.num++; 337 break; 338 case FLOW_ACTION_VLAN_POP: 339 break; 340 case FLOW_ACTION_PPPOE_PUSH: 341 if (data.pppoe.num == 1) 342 return -EOPNOTSUPP; 343 344 data.pppoe.sid = act->pppoe.sid; 345 data.pppoe.num++; 346 break; 347 default: 348 return -EOPNOTSUPP; 349 } 350 } 351 352 if (!is_valid_ether_addr(data.eth.h_source) || 353 !is_valid_ether_addr(data.eth.h_dest)) 354 return -EINVAL; 355 356 err = mtk_foe_entry_prepare(eth, &foe, offload_type, l4proto, 0, 357 data.eth.h_source, data.eth.h_dest); 358 if (err) 359 return err; 360 361 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_PORTS)) { 362 struct flow_match_ports ports; 363 364 if (offload_type == MTK_PPE_PKT_TYPE_BRIDGE) 365 return -EOPNOTSUPP; 366 367 flow_rule_match_ports(rule, &ports); 368 data.src_port = ports.key->src; 369 data.dst_port = ports.key->dst; 370 } else if (offload_type != MTK_PPE_PKT_TYPE_BRIDGE) { 371 return -EOPNOTSUPP; 372 } 373 374 if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) { 375 struct flow_match_ipv4_addrs addrs; 376 377 flow_rule_match_ipv4_addrs(rule, &addrs); 378 379 data.v4.src_addr = addrs.key->src; 380 data.v4.dst_addr = addrs.key->dst; 381 382 mtk_flow_set_ipv4_addr(eth, &foe, &data, false); 383 } 384 385 if (addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS) { 386 struct flow_match_ipv6_addrs addrs; 387 388 flow_rule_match_ipv6_addrs(rule, &addrs); 389 390 data.v6.src_addr = addrs.key->src; 391 data.v6.dst_addr = addrs.key->dst; 392 393 mtk_flow_set_ipv6_addr(eth, &foe, &data); 394 } 395 396 flow_action_for_each(i, act, &rule->action) { 397 if (act->id != FLOW_ACTION_MANGLE) 398 continue; 399 400 if (offload_type == MTK_PPE_PKT_TYPE_BRIDGE) 401 return -EOPNOTSUPP; 402 403 switch (act->mangle.htype) { 404 case FLOW_ACT_MANGLE_HDR_TYPE_TCP: 405 case FLOW_ACT_MANGLE_HDR_TYPE_UDP: 406 err = mtk_flow_mangle_ports(act, &data); 407 break; 408 case FLOW_ACT_MANGLE_HDR_TYPE_IP4: 409 err = mtk_flow_mangle_ipv4(act, &data); 410 break; 411 case FLOW_ACT_MANGLE_HDR_TYPE_ETH: 412 /* handled earlier */ 413 break; 414 default: 415 return -EOPNOTSUPP; 416 } 417 418 if (err) 419 return err; 420 } 421 422 if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) { 423 err = mtk_flow_set_ipv4_addr(eth, &foe, &data, true); 424 if (err) 425 return err; 426 } 427 428 if (offload_type == MTK_PPE_PKT_TYPE_BRIDGE) 429 foe.bridge.vlan = data.vlan_in; 430 431 if (data.vlan.num == 1) { 432 if (data.vlan.proto != htons(ETH_P_8021Q)) 433 return -EOPNOTSUPP; 434 435 mtk_foe_entry_set_vlan(eth, &foe, data.vlan.id); 436 } 437 if (data.pppoe.num == 1) 438 mtk_foe_entry_set_pppoe(eth, &foe, data.pppoe.sid); 439 440 err = mtk_flow_set_output_device(eth, &foe, odev, data.eth.h_dest, 441 &wed_index); 442 if (err) 443 return err; 444 445 if (wed_index >= 0 && (err = mtk_wed_flow_add(wed_index)) < 0) 446 return err; 447 448 entry = kzalloc(sizeof(*entry), GFP_KERNEL); 449 if (!entry) 450 return -ENOMEM; 451 452 entry->cookie = f->cookie; 453 memcpy(&entry->data, &foe, sizeof(entry->data)); 454 entry->wed_index = wed_index; 455 456 err = mtk_foe_entry_commit(eth->ppe[entry->ppe_index], entry); 457 if (err < 0) 458 goto free; 459 460 err = rhashtable_insert_fast(ð->flow_table, &entry->node, 461 mtk_flow_ht_params); 462 if (err < 0) 463 goto clear; 464 465 return 0; 466 467 clear: 468 mtk_foe_entry_clear(eth->ppe[entry->ppe_index], entry); 469 free: 470 kfree(entry); 471 if (wed_index >= 0) 472 mtk_wed_flow_remove(wed_index); 473 return err; 474 } 475 476 static int 477 mtk_flow_offload_destroy(struct mtk_eth *eth, struct flow_cls_offload *f) 478 { 479 struct mtk_flow_entry *entry; 480 481 entry = rhashtable_lookup(ð->flow_table, &f->cookie, 482 mtk_flow_ht_params); 483 if (!entry) 484 return -ENOENT; 485 486 mtk_foe_entry_clear(eth->ppe[entry->ppe_index], entry); 487 rhashtable_remove_fast(ð->flow_table, &entry->node, 488 mtk_flow_ht_params); 489 if (entry->wed_index >= 0) 490 mtk_wed_flow_remove(entry->wed_index); 491 kfree(entry); 492 493 return 0; 494 } 495 496 static int 497 mtk_flow_offload_stats(struct mtk_eth *eth, struct flow_cls_offload *f) 498 { 499 struct mtk_flow_entry *entry; 500 u32 idle; 501 502 entry = rhashtable_lookup(ð->flow_table, &f->cookie, 503 mtk_flow_ht_params); 504 if (!entry) 505 return -ENOENT; 506 507 idle = mtk_foe_entry_idle_time(eth->ppe[entry->ppe_index], entry); 508 f->stats.lastused = jiffies - idle * HZ; 509 510 return 0; 511 } 512 513 static DEFINE_MUTEX(mtk_flow_offload_mutex); 514 515 static int 516 mtk_eth_setup_tc_block_cb(enum tc_setup_type type, void *type_data, void *cb_priv) 517 { 518 struct flow_cls_offload *cls = type_data; 519 struct net_device *dev = cb_priv; 520 struct mtk_mac *mac = netdev_priv(dev); 521 struct mtk_eth *eth = mac->hw; 522 int err; 523 524 if (!tc_can_offload(dev)) 525 return -EOPNOTSUPP; 526 527 if (type != TC_SETUP_CLSFLOWER) 528 return -EOPNOTSUPP; 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); 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(struct net_device *dev, struct flow_block_offload *f) 552 { 553 struct mtk_mac *mac = netdev_priv(dev); 554 struct mtk_eth *eth = mac->hw; 555 static LIST_HEAD(block_cb_list); 556 struct flow_block_cb *block_cb; 557 flow_setup_cb_t *cb; 558 559 if (!eth->soc->offload_version) 560 return -EOPNOTSUPP; 561 562 if (f->binder_type != FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS) 563 return -EOPNOTSUPP; 564 565 cb = mtk_eth_setup_tc_block_cb; 566 f->driver_block_list = &block_cb_list; 567 568 switch (f->command) { 569 case FLOW_BLOCK_BIND: 570 block_cb = flow_block_cb_lookup(f->block, cb, dev); 571 if (block_cb) { 572 flow_block_cb_incref(block_cb); 573 return 0; 574 } 575 block_cb = flow_block_cb_alloc(cb, dev, dev, NULL); 576 if (IS_ERR(block_cb)) 577 return PTR_ERR(block_cb); 578 579 flow_block_cb_add(block_cb, f); 580 list_add_tail(&block_cb->driver_list, &block_cb_list); 581 return 0; 582 case FLOW_BLOCK_UNBIND: 583 block_cb = flow_block_cb_lookup(f->block, cb, dev); 584 if (!block_cb) 585 return -ENOENT; 586 587 if (flow_block_cb_decref(block_cb)) { 588 flow_block_cb_remove(block_cb, f); 589 list_del(&block_cb->driver_list); 590 } 591 return 0; 592 default: 593 return -EOPNOTSUPP; 594 } 595 } 596 597 int mtk_eth_setup_tc(struct net_device *dev, enum tc_setup_type type, 598 void *type_data) 599 { 600 switch (type) { 601 case TC_SETUP_BLOCK: 602 case TC_SETUP_FT: 603 return mtk_eth_setup_tc_block(dev, type_data); 604 default: 605 return -EOPNOTSUPP; 606 } 607 } 608 609 int mtk_eth_offload_init(struct mtk_eth *eth) 610 { 611 return rhashtable_init(ð->flow_table, &mtk_flow_ht_params); 612 } 613