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_foe_entry *foe, struct mtk_flow_data *data, 56 bool egress) 57 { 58 return mtk_foe_entry_set_ipv4_tuple(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_foe_entry *foe, struct mtk_flow_data *data) 65 { 66 return mtk_foe_entry_set_ipv6_tuple(foe, 67 data->v6.src_addr.s6_addr32, data->src_port, 68 data->v6.dst_addr.s6_addr32, data->dst_port); 69 } 70 71 static void 72 mtk_flow_offload_mangle_eth(const struct flow_action_entry *act, void *eth) 73 { 74 void *dest = eth + act->mangle.offset; 75 const void *src = &act->mangle.val; 76 77 if (act->mangle.offset > 8) 78 return; 79 80 if (act->mangle.mask == 0xffff) { 81 src += 2; 82 dest += 2; 83 } 84 85 memcpy(dest, src, act->mangle.mask ? 2 : 4); 86 } 87 88 static int 89 mtk_flow_get_wdma_info(struct net_device *dev, const u8 *addr, struct mtk_wdma_info *info) 90 { 91 struct net_device_path_ctx ctx = { 92 .dev = dev, 93 }; 94 struct net_device_path path = {}; 95 96 memcpy(ctx.daddr, addr, sizeof(ctx.daddr)); 97 98 if (!IS_ENABLED(CONFIG_NET_MEDIATEK_SOC_WED)) 99 return -1; 100 101 if (!dev->netdev_ops->ndo_fill_forward_path) 102 return -1; 103 104 if (dev->netdev_ops->ndo_fill_forward_path(&ctx, &path)) 105 return -1; 106 107 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 = dp->cpu_dp->master; 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(foe, info.wdma_idx, info.queue, info.bss, 195 info.wcid); 196 pse_port = 3; 197 *wed_index = info.wdma_idx; 198 goto out; 199 } 200 201 dsa_port = mtk_flow_get_dsa_port(&dev); 202 if (dsa_port >= 0) 203 mtk_foe_entry_set_dsa(foe, dsa_port); 204 205 if (dev == eth->netdev[0]) 206 pse_port = 1; 207 else if (dev == eth->netdev[1]) 208 pse_port = 2; 209 else 210 return -EOPNOTSUPP; 211 212 out: 213 mtk_foe_entry_set_pse_port(foe, pse_port); 214 215 return 0; 216 } 217 218 static int 219 mtk_flow_offload_replace(struct mtk_eth *eth, struct flow_cls_offload *f) 220 { 221 struct flow_rule *rule = flow_cls_offload_flow_rule(f); 222 struct flow_action_entry *act; 223 struct mtk_flow_data data = {}; 224 struct mtk_foe_entry foe; 225 struct net_device *odev = NULL; 226 struct mtk_flow_entry *entry; 227 int offload_type = 0; 228 int wed_index = -1; 229 u16 addr_type = 0; 230 u8 l4proto = 0; 231 int err = 0; 232 int i; 233 234 if (rhashtable_lookup(ð->flow_table, &f->cookie, mtk_flow_ht_params)) 235 return -EEXIST; 236 237 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_META)) { 238 struct flow_match_meta match; 239 240 flow_rule_match_meta(rule, &match); 241 } else { 242 return -EOPNOTSUPP; 243 } 244 245 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_CONTROL)) { 246 struct flow_match_control match; 247 248 flow_rule_match_control(rule, &match); 249 addr_type = match.key->addr_type; 250 } else { 251 return -EOPNOTSUPP; 252 } 253 254 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_BASIC)) { 255 struct flow_match_basic match; 256 257 flow_rule_match_basic(rule, &match); 258 l4proto = match.key->ip_proto; 259 } else { 260 return -EOPNOTSUPP; 261 } 262 263 switch (addr_type) { 264 case 0: 265 offload_type = MTK_PPE_PKT_TYPE_BRIDGE; 266 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ETH_ADDRS)) { 267 struct flow_match_eth_addrs match; 268 269 flow_rule_match_eth_addrs(rule, &match); 270 memcpy(data.eth.h_dest, match.key->dst, ETH_ALEN); 271 memcpy(data.eth.h_source, match.key->src, ETH_ALEN); 272 } else { 273 return -EOPNOTSUPP; 274 } 275 276 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_VLAN)) { 277 struct flow_match_vlan match; 278 279 flow_rule_match_vlan(rule, &match); 280 281 if (match.key->vlan_tpid != cpu_to_be16(ETH_P_8021Q)) 282 return -EOPNOTSUPP; 283 284 data.vlan_in = match.key->vlan_id; 285 } 286 break; 287 case FLOW_DISSECTOR_KEY_IPV4_ADDRS: 288 offload_type = MTK_PPE_PKT_TYPE_IPV4_HNAPT; 289 break; 290 case FLOW_DISSECTOR_KEY_IPV6_ADDRS: 291 offload_type = MTK_PPE_PKT_TYPE_IPV6_ROUTE_5T; 292 break; 293 default: 294 return -EOPNOTSUPP; 295 } 296 297 flow_action_for_each(i, act, &rule->action) { 298 switch (act->id) { 299 case FLOW_ACTION_MANGLE: 300 if (offload_type == MTK_PPE_PKT_TYPE_BRIDGE) 301 return -EOPNOTSUPP; 302 if (act->mangle.htype == FLOW_ACT_MANGLE_HDR_TYPE_ETH) 303 mtk_flow_offload_mangle_eth(act, &data.eth); 304 break; 305 case FLOW_ACTION_REDIRECT: 306 odev = act->dev; 307 break; 308 case FLOW_ACTION_CSUM: 309 break; 310 case FLOW_ACTION_VLAN_PUSH: 311 if (data.vlan.num == 1 || 312 act->vlan.proto != htons(ETH_P_8021Q)) 313 return -EOPNOTSUPP; 314 315 data.vlan.id = act->vlan.vid; 316 data.vlan.proto = act->vlan.proto; 317 data.vlan.num++; 318 break; 319 case FLOW_ACTION_VLAN_POP: 320 break; 321 case FLOW_ACTION_PPPOE_PUSH: 322 if (data.pppoe.num == 1) 323 return -EOPNOTSUPP; 324 325 data.pppoe.sid = act->pppoe.sid; 326 data.pppoe.num++; 327 break; 328 default: 329 return -EOPNOTSUPP; 330 } 331 } 332 333 if (!is_valid_ether_addr(data.eth.h_source) || 334 !is_valid_ether_addr(data.eth.h_dest)) 335 return -EINVAL; 336 337 err = mtk_foe_entry_prepare(&foe, offload_type, l4proto, 0, 338 data.eth.h_source, 339 data.eth.h_dest); 340 if (err) 341 return err; 342 343 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_PORTS)) { 344 struct flow_match_ports ports; 345 346 if (offload_type == MTK_PPE_PKT_TYPE_BRIDGE) 347 return -EOPNOTSUPP; 348 349 flow_rule_match_ports(rule, &ports); 350 data.src_port = ports.key->src; 351 data.dst_port = ports.key->dst; 352 } else if (offload_type != MTK_PPE_PKT_TYPE_BRIDGE) { 353 return -EOPNOTSUPP; 354 } 355 356 if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) { 357 struct flow_match_ipv4_addrs addrs; 358 359 flow_rule_match_ipv4_addrs(rule, &addrs); 360 361 data.v4.src_addr = addrs.key->src; 362 data.v4.dst_addr = addrs.key->dst; 363 364 mtk_flow_set_ipv4_addr(&foe, &data, false); 365 } 366 367 if (addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS) { 368 struct flow_match_ipv6_addrs addrs; 369 370 flow_rule_match_ipv6_addrs(rule, &addrs); 371 372 data.v6.src_addr = addrs.key->src; 373 data.v6.dst_addr = addrs.key->dst; 374 375 mtk_flow_set_ipv6_addr(&foe, &data); 376 } 377 378 flow_action_for_each(i, act, &rule->action) { 379 if (act->id != FLOW_ACTION_MANGLE) 380 continue; 381 382 if (offload_type == MTK_PPE_PKT_TYPE_BRIDGE) 383 return -EOPNOTSUPP; 384 385 switch (act->mangle.htype) { 386 case FLOW_ACT_MANGLE_HDR_TYPE_TCP: 387 case FLOW_ACT_MANGLE_HDR_TYPE_UDP: 388 err = mtk_flow_mangle_ports(act, &data); 389 break; 390 case FLOW_ACT_MANGLE_HDR_TYPE_IP4: 391 err = mtk_flow_mangle_ipv4(act, &data); 392 break; 393 case FLOW_ACT_MANGLE_HDR_TYPE_ETH: 394 /* handled earlier */ 395 break; 396 default: 397 return -EOPNOTSUPP; 398 } 399 400 if (err) 401 return err; 402 } 403 404 if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) { 405 err = mtk_flow_set_ipv4_addr(&foe, &data, true); 406 if (err) 407 return err; 408 } 409 410 if (offload_type == MTK_PPE_PKT_TYPE_BRIDGE) 411 foe.bridge.vlan = data.vlan_in; 412 413 if (data.vlan.num == 1) { 414 if (data.vlan.proto != htons(ETH_P_8021Q)) 415 return -EOPNOTSUPP; 416 417 mtk_foe_entry_set_vlan(&foe, data.vlan.id); 418 } 419 if (data.pppoe.num == 1) 420 mtk_foe_entry_set_pppoe(&foe, data.pppoe.sid); 421 422 err = mtk_flow_set_output_device(eth, &foe, odev, data.eth.h_dest, 423 &wed_index); 424 if (err) 425 return err; 426 427 if (wed_index >= 0 && (err = mtk_wed_flow_add(wed_index)) < 0) 428 return err; 429 430 entry = kzalloc(sizeof(*entry), GFP_KERNEL); 431 if (!entry) 432 return -ENOMEM; 433 434 entry->cookie = f->cookie; 435 memcpy(&entry->data, &foe, sizeof(entry->data)); 436 entry->wed_index = wed_index; 437 438 err = mtk_foe_entry_commit(eth->ppe, entry); 439 if (err < 0) 440 goto free; 441 442 err = rhashtable_insert_fast(ð->flow_table, &entry->node, 443 mtk_flow_ht_params); 444 if (err < 0) 445 goto clear; 446 447 return 0; 448 449 clear: 450 mtk_foe_entry_clear(eth->ppe, entry); 451 free: 452 kfree(entry); 453 if (wed_index >= 0) 454 mtk_wed_flow_remove(wed_index); 455 return err; 456 } 457 458 static int 459 mtk_flow_offload_destroy(struct mtk_eth *eth, struct flow_cls_offload *f) 460 { 461 struct mtk_flow_entry *entry; 462 463 entry = rhashtable_lookup(ð->flow_table, &f->cookie, 464 mtk_flow_ht_params); 465 if (!entry) 466 return -ENOENT; 467 468 mtk_foe_entry_clear(eth->ppe, entry); 469 rhashtable_remove_fast(ð->flow_table, &entry->node, 470 mtk_flow_ht_params); 471 if (entry->wed_index >= 0) 472 mtk_wed_flow_remove(entry->wed_index); 473 kfree(entry); 474 475 return 0; 476 } 477 478 static int 479 mtk_flow_offload_stats(struct mtk_eth *eth, struct flow_cls_offload *f) 480 { 481 struct mtk_flow_entry *entry; 482 u32 idle; 483 484 entry = rhashtable_lookup(ð->flow_table, &f->cookie, 485 mtk_flow_ht_params); 486 if (!entry) 487 return -ENOENT; 488 489 idle = mtk_foe_entry_idle_time(eth->ppe, entry); 490 f->stats.lastused = jiffies - idle * HZ; 491 492 return 0; 493 } 494 495 static DEFINE_MUTEX(mtk_flow_offload_mutex); 496 497 static int 498 mtk_eth_setup_tc_block_cb(enum tc_setup_type type, void *type_data, void *cb_priv) 499 { 500 struct flow_cls_offload *cls = type_data; 501 struct net_device *dev = cb_priv; 502 struct mtk_mac *mac = netdev_priv(dev); 503 struct mtk_eth *eth = mac->hw; 504 int err; 505 506 if (!tc_can_offload(dev)) 507 return -EOPNOTSUPP; 508 509 if (type != TC_SETUP_CLSFLOWER) 510 return -EOPNOTSUPP; 511 512 mutex_lock(&mtk_flow_offload_mutex); 513 switch (cls->command) { 514 case FLOW_CLS_REPLACE: 515 err = mtk_flow_offload_replace(eth, cls); 516 break; 517 case FLOW_CLS_DESTROY: 518 err = mtk_flow_offload_destroy(eth, cls); 519 break; 520 case FLOW_CLS_STATS: 521 err = mtk_flow_offload_stats(eth, cls); 522 break; 523 default: 524 err = -EOPNOTSUPP; 525 break; 526 } 527 mutex_unlock(&mtk_flow_offload_mutex); 528 529 return err; 530 } 531 532 static int 533 mtk_eth_setup_tc_block(struct net_device *dev, struct flow_block_offload *f) 534 { 535 struct mtk_mac *mac = netdev_priv(dev); 536 struct mtk_eth *eth = mac->hw; 537 static LIST_HEAD(block_cb_list); 538 struct flow_block_cb *block_cb; 539 flow_setup_cb_t *cb; 540 541 if (!eth->ppe || !eth->ppe->foe_table) 542 return -EOPNOTSUPP; 543 544 if (f->binder_type != FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS) 545 return -EOPNOTSUPP; 546 547 cb = mtk_eth_setup_tc_block_cb; 548 f->driver_block_list = &block_cb_list; 549 550 switch (f->command) { 551 case FLOW_BLOCK_BIND: 552 block_cb = flow_block_cb_lookup(f->block, cb, dev); 553 if (block_cb) { 554 flow_block_cb_incref(block_cb); 555 return 0; 556 } 557 block_cb = flow_block_cb_alloc(cb, dev, dev, NULL); 558 if (IS_ERR(block_cb)) 559 return PTR_ERR(block_cb); 560 561 flow_block_cb_add(block_cb, f); 562 list_add_tail(&block_cb->driver_list, &block_cb_list); 563 return 0; 564 case FLOW_BLOCK_UNBIND: 565 block_cb = flow_block_cb_lookup(f->block, cb, dev); 566 if (!block_cb) 567 return -ENOENT; 568 569 if (flow_block_cb_decref(block_cb)) { 570 flow_block_cb_remove(block_cb, f); 571 list_del(&block_cb->driver_list); 572 } 573 return 0; 574 default: 575 return -EOPNOTSUPP; 576 } 577 } 578 579 int mtk_eth_setup_tc(struct net_device *dev, enum tc_setup_type type, 580 void *type_data) 581 { 582 switch (type) { 583 case TC_SETUP_BLOCK: 584 case TC_SETUP_FT: 585 return mtk_eth_setup_tc_block(dev, type_data); 586 default: 587 return -EOPNOTSUPP; 588 } 589 } 590 591 int mtk_eth_offload_init(struct mtk_eth *eth) 592 { 593 if (!eth->ppe || !eth->ppe->foe_table) 594 return 0; 595 596 return rhashtable_init(ð->flow_table, &mtk_flow_ht_params); 597 } 598