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; 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 if (dsa_port >= 0) 216 mtk_foe_entry_set_dsa(eth, foe, dsa_port); 217 218 if (dev == eth->netdev[0]) 219 pse_port = 1; 220 else if (dev == eth->netdev[1]) 221 pse_port = 2; 222 else 223 return -EOPNOTSUPP; 224 225 out: 226 mtk_foe_entry_set_pse_port(eth, foe, pse_port); 227 228 return 0; 229 } 230 231 static int 232 mtk_flow_offload_replace(struct mtk_eth *eth, struct flow_cls_offload *f) 233 { 234 struct flow_rule *rule = flow_cls_offload_flow_rule(f); 235 struct flow_action_entry *act; 236 struct mtk_flow_data data = {}; 237 struct mtk_foe_entry foe; 238 struct net_device *odev = NULL; 239 struct mtk_flow_entry *entry; 240 int offload_type = 0; 241 int wed_index = -1; 242 u16 addr_type = 0; 243 u8 l4proto = 0; 244 int err = 0; 245 int i; 246 247 if (rhashtable_lookup(ð->flow_table, &f->cookie, mtk_flow_ht_params)) 248 return -EEXIST; 249 250 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_META)) { 251 struct flow_match_meta match; 252 253 flow_rule_match_meta(rule, &match); 254 } else { 255 return -EOPNOTSUPP; 256 } 257 258 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_CONTROL)) { 259 struct flow_match_control match; 260 261 flow_rule_match_control(rule, &match); 262 addr_type = match.key->addr_type; 263 } else { 264 return -EOPNOTSUPP; 265 } 266 267 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_BASIC)) { 268 struct flow_match_basic match; 269 270 flow_rule_match_basic(rule, &match); 271 l4proto = match.key->ip_proto; 272 } else { 273 return -EOPNOTSUPP; 274 } 275 276 switch (addr_type) { 277 case 0: 278 offload_type = MTK_PPE_PKT_TYPE_BRIDGE; 279 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ETH_ADDRS)) { 280 struct flow_match_eth_addrs match; 281 282 flow_rule_match_eth_addrs(rule, &match); 283 memcpy(data.eth.h_dest, match.key->dst, ETH_ALEN); 284 memcpy(data.eth.h_source, match.key->src, ETH_ALEN); 285 } else { 286 return -EOPNOTSUPP; 287 } 288 289 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_VLAN)) { 290 struct flow_match_vlan match; 291 292 flow_rule_match_vlan(rule, &match); 293 294 if (match.key->vlan_tpid != cpu_to_be16(ETH_P_8021Q)) 295 return -EOPNOTSUPP; 296 297 data.vlan_in = match.key->vlan_id; 298 } 299 break; 300 case FLOW_DISSECTOR_KEY_IPV4_ADDRS: 301 offload_type = MTK_PPE_PKT_TYPE_IPV4_HNAPT; 302 break; 303 case FLOW_DISSECTOR_KEY_IPV6_ADDRS: 304 offload_type = MTK_PPE_PKT_TYPE_IPV6_ROUTE_5T; 305 break; 306 default: 307 return -EOPNOTSUPP; 308 } 309 310 flow_action_for_each(i, act, &rule->action) { 311 switch (act->id) { 312 case FLOW_ACTION_MANGLE: 313 if (offload_type == MTK_PPE_PKT_TYPE_BRIDGE) 314 return -EOPNOTSUPP; 315 if (act->mangle.htype == FLOW_ACT_MANGLE_HDR_TYPE_ETH) 316 mtk_flow_offload_mangle_eth(act, &data.eth); 317 break; 318 case FLOW_ACTION_REDIRECT: 319 odev = act->dev; 320 break; 321 case FLOW_ACTION_CSUM: 322 break; 323 case FLOW_ACTION_VLAN_PUSH: 324 if (data.vlan.num == 1 || 325 act->vlan.proto != htons(ETH_P_8021Q)) 326 return -EOPNOTSUPP; 327 328 data.vlan.id = act->vlan.vid; 329 data.vlan.proto = act->vlan.proto; 330 data.vlan.num++; 331 break; 332 case FLOW_ACTION_VLAN_POP: 333 break; 334 case FLOW_ACTION_PPPOE_PUSH: 335 if (data.pppoe.num == 1) 336 return -EOPNOTSUPP; 337 338 data.pppoe.sid = act->pppoe.sid; 339 data.pppoe.num++; 340 break; 341 default: 342 return -EOPNOTSUPP; 343 } 344 } 345 346 if (!is_valid_ether_addr(data.eth.h_source) || 347 !is_valid_ether_addr(data.eth.h_dest)) 348 return -EINVAL; 349 350 err = mtk_foe_entry_prepare(eth, &foe, offload_type, l4proto, 0, 351 data.eth.h_source, data.eth.h_dest); 352 if (err) 353 return err; 354 355 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_PORTS)) { 356 struct flow_match_ports ports; 357 358 if (offload_type == MTK_PPE_PKT_TYPE_BRIDGE) 359 return -EOPNOTSUPP; 360 361 flow_rule_match_ports(rule, &ports); 362 data.src_port = ports.key->src; 363 data.dst_port = ports.key->dst; 364 } else if (offload_type != MTK_PPE_PKT_TYPE_BRIDGE) { 365 return -EOPNOTSUPP; 366 } 367 368 if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) { 369 struct flow_match_ipv4_addrs addrs; 370 371 flow_rule_match_ipv4_addrs(rule, &addrs); 372 373 data.v4.src_addr = addrs.key->src; 374 data.v4.dst_addr = addrs.key->dst; 375 376 mtk_flow_set_ipv4_addr(eth, &foe, &data, false); 377 } 378 379 if (addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS) { 380 struct flow_match_ipv6_addrs addrs; 381 382 flow_rule_match_ipv6_addrs(rule, &addrs); 383 384 data.v6.src_addr = addrs.key->src; 385 data.v6.dst_addr = addrs.key->dst; 386 387 mtk_flow_set_ipv6_addr(eth, &foe, &data); 388 } 389 390 flow_action_for_each(i, act, &rule->action) { 391 if (act->id != FLOW_ACTION_MANGLE) 392 continue; 393 394 if (offload_type == MTK_PPE_PKT_TYPE_BRIDGE) 395 return -EOPNOTSUPP; 396 397 switch (act->mangle.htype) { 398 case FLOW_ACT_MANGLE_HDR_TYPE_TCP: 399 case FLOW_ACT_MANGLE_HDR_TYPE_UDP: 400 err = mtk_flow_mangle_ports(act, &data); 401 break; 402 case FLOW_ACT_MANGLE_HDR_TYPE_IP4: 403 err = mtk_flow_mangle_ipv4(act, &data); 404 break; 405 case FLOW_ACT_MANGLE_HDR_TYPE_ETH: 406 /* handled earlier */ 407 break; 408 default: 409 return -EOPNOTSUPP; 410 } 411 412 if (err) 413 return err; 414 } 415 416 if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) { 417 err = mtk_flow_set_ipv4_addr(eth, &foe, &data, true); 418 if (err) 419 return err; 420 } 421 422 if (offload_type == MTK_PPE_PKT_TYPE_BRIDGE) 423 foe.bridge.vlan = data.vlan_in; 424 425 if (data.vlan.num == 1) { 426 if (data.vlan.proto != htons(ETH_P_8021Q)) 427 return -EOPNOTSUPP; 428 429 mtk_foe_entry_set_vlan(eth, &foe, data.vlan.id); 430 } 431 if (data.pppoe.num == 1) 432 mtk_foe_entry_set_pppoe(eth, &foe, data.pppoe.sid); 433 434 err = mtk_flow_set_output_device(eth, &foe, odev, data.eth.h_dest, 435 &wed_index); 436 if (err) 437 return err; 438 439 if (wed_index >= 0 && (err = mtk_wed_flow_add(wed_index)) < 0) 440 return err; 441 442 entry = kzalloc(sizeof(*entry), GFP_KERNEL); 443 if (!entry) 444 return -ENOMEM; 445 446 entry->cookie = f->cookie; 447 memcpy(&entry->data, &foe, sizeof(entry->data)); 448 entry->wed_index = wed_index; 449 450 err = mtk_foe_entry_commit(eth->ppe[entry->ppe_index], entry); 451 if (err < 0) 452 goto free; 453 454 err = rhashtable_insert_fast(ð->flow_table, &entry->node, 455 mtk_flow_ht_params); 456 if (err < 0) 457 goto clear; 458 459 return 0; 460 461 clear: 462 mtk_foe_entry_clear(eth->ppe[entry->ppe_index], entry); 463 free: 464 kfree(entry); 465 if (wed_index >= 0) 466 mtk_wed_flow_remove(wed_index); 467 return err; 468 } 469 470 static int 471 mtk_flow_offload_destroy(struct mtk_eth *eth, struct flow_cls_offload *f) 472 { 473 struct mtk_flow_entry *entry; 474 475 entry = rhashtable_lookup(ð->flow_table, &f->cookie, 476 mtk_flow_ht_params); 477 if (!entry) 478 return -ENOENT; 479 480 mtk_foe_entry_clear(eth->ppe[entry->ppe_index], entry); 481 rhashtable_remove_fast(ð->flow_table, &entry->node, 482 mtk_flow_ht_params); 483 if (entry->wed_index >= 0) 484 mtk_wed_flow_remove(entry->wed_index); 485 kfree(entry); 486 487 return 0; 488 } 489 490 static int 491 mtk_flow_offload_stats(struct mtk_eth *eth, struct flow_cls_offload *f) 492 { 493 struct mtk_flow_entry *entry; 494 u32 idle; 495 496 entry = rhashtable_lookup(ð->flow_table, &f->cookie, 497 mtk_flow_ht_params); 498 if (!entry) 499 return -ENOENT; 500 501 idle = mtk_foe_entry_idle_time(eth->ppe[entry->ppe_index], entry); 502 f->stats.lastused = jiffies - idle * HZ; 503 504 return 0; 505 } 506 507 static DEFINE_MUTEX(mtk_flow_offload_mutex); 508 509 static int 510 mtk_eth_setup_tc_block_cb(enum tc_setup_type type, void *type_data, void *cb_priv) 511 { 512 struct flow_cls_offload *cls = type_data; 513 struct net_device *dev = cb_priv; 514 struct mtk_mac *mac = netdev_priv(dev); 515 struct mtk_eth *eth = mac->hw; 516 int err; 517 518 if (!tc_can_offload(dev)) 519 return -EOPNOTSUPP; 520 521 if (type != TC_SETUP_CLSFLOWER) 522 return -EOPNOTSUPP; 523 524 mutex_lock(&mtk_flow_offload_mutex); 525 switch (cls->command) { 526 case FLOW_CLS_REPLACE: 527 err = mtk_flow_offload_replace(eth, cls); 528 break; 529 case FLOW_CLS_DESTROY: 530 err = mtk_flow_offload_destroy(eth, cls); 531 break; 532 case FLOW_CLS_STATS: 533 err = mtk_flow_offload_stats(eth, cls); 534 break; 535 default: 536 err = -EOPNOTSUPP; 537 break; 538 } 539 mutex_unlock(&mtk_flow_offload_mutex); 540 541 return err; 542 } 543 544 static int 545 mtk_eth_setup_tc_block(struct net_device *dev, struct flow_block_offload *f) 546 { 547 struct mtk_mac *mac = netdev_priv(dev); 548 struct mtk_eth *eth = mac->hw; 549 static LIST_HEAD(block_cb_list); 550 struct flow_block_cb *block_cb; 551 flow_setup_cb_t *cb; 552 553 if (!eth->soc->offload_version) 554 return -EOPNOTSUPP; 555 556 if (f->binder_type != FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS) 557 return -EOPNOTSUPP; 558 559 cb = mtk_eth_setup_tc_block_cb; 560 f->driver_block_list = &block_cb_list; 561 562 switch (f->command) { 563 case FLOW_BLOCK_BIND: 564 block_cb = flow_block_cb_lookup(f->block, cb, dev); 565 if (block_cb) { 566 flow_block_cb_incref(block_cb); 567 return 0; 568 } 569 block_cb = flow_block_cb_alloc(cb, dev, dev, NULL); 570 if (IS_ERR(block_cb)) 571 return PTR_ERR(block_cb); 572 573 flow_block_cb_add(block_cb, f); 574 list_add_tail(&block_cb->driver_list, &block_cb_list); 575 return 0; 576 case FLOW_BLOCK_UNBIND: 577 block_cb = flow_block_cb_lookup(f->block, cb, dev); 578 if (!block_cb) 579 return -ENOENT; 580 581 if (flow_block_cb_decref(block_cb)) { 582 flow_block_cb_remove(block_cb, f); 583 list_del(&block_cb->driver_list); 584 } 585 return 0; 586 default: 587 return -EOPNOTSUPP; 588 } 589 } 590 591 int mtk_eth_setup_tc(struct net_device *dev, enum tc_setup_type type, 592 void *type_data) 593 { 594 switch (type) { 595 case TC_SETUP_BLOCK: 596 case TC_SETUP_FT: 597 return mtk_eth_setup_tc_block(dev, type_data); 598 default: 599 return -EOPNOTSUPP; 600 } 601 } 602 603 int mtk_eth_offload_init(struct mtk_eth *eth) 604 { 605 return rhashtable_init(ð->flow_table, &mtk_flow_ht_params); 606 } 607