1 // SPDX-License-Identifier: (GPL-2.0 OR MIT) 2 /* 3 * Copyright (c) 2018 Synopsys, Inc. and/or its affiliates. 4 * stmmac TC Handling (HW only) 5 */ 6 7 #include <net/pkt_cls.h> 8 #include <net/tc_act/tc_gact.h> 9 #include "common.h" 10 #include "dwmac4.h" 11 #include "dwmac5.h" 12 #include "stmmac.h" 13 14 static void tc_fill_all_pass_entry(struct stmmac_tc_entry *entry) 15 { 16 memset(entry, 0, sizeof(*entry)); 17 entry->in_use = true; 18 entry->is_last = true; 19 entry->is_frag = false; 20 entry->prio = ~0x0; 21 entry->handle = 0; 22 entry->val.match_data = 0x0; 23 entry->val.match_en = 0x0; 24 entry->val.af = 1; 25 entry->val.dma_ch_no = 0x0; 26 } 27 28 static struct stmmac_tc_entry *tc_find_entry(struct stmmac_priv *priv, 29 struct tc_cls_u32_offload *cls, 30 bool free) 31 { 32 struct stmmac_tc_entry *entry, *first = NULL, *dup = NULL; 33 u32 loc = cls->knode.handle; 34 int i; 35 36 for (i = 0; i < priv->tc_entries_max; i++) { 37 entry = &priv->tc_entries[i]; 38 if (!entry->in_use && !first && free) 39 first = entry; 40 if ((entry->handle == loc) && !free && !entry->is_frag) 41 dup = entry; 42 } 43 44 if (dup) 45 return dup; 46 if (first) { 47 first->handle = loc; 48 first->in_use = true; 49 50 /* Reset HW values */ 51 memset(&first->val, 0, sizeof(first->val)); 52 } 53 54 return first; 55 } 56 57 static int tc_fill_actions(struct stmmac_tc_entry *entry, 58 struct stmmac_tc_entry *frag, 59 struct tc_cls_u32_offload *cls) 60 { 61 struct stmmac_tc_entry *action_entry = entry; 62 const struct tc_action *act; 63 struct tcf_exts *exts; 64 int i; 65 66 exts = cls->knode.exts; 67 if (!tcf_exts_has_actions(exts)) 68 return -EINVAL; 69 if (frag) 70 action_entry = frag; 71 72 tcf_exts_for_each_action(i, act, exts) { 73 /* Accept */ 74 if (is_tcf_gact_ok(act)) { 75 action_entry->val.af = 1; 76 break; 77 } 78 /* Drop */ 79 if (is_tcf_gact_shot(act)) { 80 action_entry->val.rf = 1; 81 break; 82 } 83 84 /* Unsupported */ 85 return -EINVAL; 86 } 87 88 return 0; 89 } 90 91 static int tc_fill_entry(struct stmmac_priv *priv, 92 struct tc_cls_u32_offload *cls) 93 { 94 struct stmmac_tc_entry *entry, *frag = NULL; 95 struct tc_u32_sel *sel = cls->knode.sel; 96 u32 off, data, mask, real_off, rem; 97 u32 prio = cls->common.prio << 16; 98 int ret; 99 100 /* Only 1 match per entry */ 101 if (sel->nkeys <= 0 || sel->nkeys > 1) 102 return -EINVAL; 103 104 off = sel->keys[0].off << sel->offshift; 105 data = sel->keys[0].val; 106 mask = sel->keys[0].mask; 107 108 switch (ntohs(cls->common.protocol)) { 109 case ETH_P_ALL: 110 break; 111 case ETH_P_IP: 112 off += ETH_HLEN; 113 break; 114 default: 115 return -EINVAL; 116 } 117 118 if (off > priv->tc_off_max) 119 return -EINVAL; 120 121 real_off = off / 4; 122 rem = off % 4; 123 124 entry = tc_find_entry(priv, cls, true); 125 if (!entry) 126 return -EINVAL; 127 128 if (rem) { 129 frag = tc_find_entry(priv, cls, true); 130 if (!frag) { 131 ret = -EINVAL; 132 goto err_unuse; 133 } 134 135 entry->frag_ptr = frag; 136 entry->val.match_en = (mask << (rem * 8)) & 137 GENMASK(31, rem * 8); 138 entry->val.match_data = (data << (rem * 8)) & 139 GENMASK(31, rem * 8); 140 entry->val.frame_offset = real_off; 141 entry->prio = prio; 142 143 frag->val.match_en = (mask >> (rem * 8)) & 144 GENMASK(rem * 8 - 1, 0); 145 frag->val.match_data = (data >> (rem * 8)) & 146 GENMASK(rem * 8 - 1, 0); 147 frag->val.frame_offset = real_off + 1; 148 frag->prio = prio; 149 frag->is_frag = true; 150 } else { 151 entry->frag_ptr = NULL; 152 entry->val.match_en = mask; 153 entry->val.match_data = data; 154 entry->val.frame_offset = real_off; 155 entry->prio = prio; 156 } 157 158 ret = tc_fill_actions(entry, frag, cls); 159 if (ret) 160 goto err_unuse; 161 162 return 0; 163 164 err_unuse: 165 if (frag) 166 frag->in_use = false; 167 entry->in_use = false; 168 return ret; 169 } 170 171 static void tc_unfill_entry(struct stmmac_priv *priv, 172 struct tc_cls_u32_offload *cls) 173 { 174 struct stmmac_tc_entry *entry; 175 176 entry = tc_find_entry(priv, cls, false); 177 if (!entry) 178 return; 179 180 entry->in_use = false; 181 if (entry->frag_ptr) { 182 entry = entry->frag_ptr; 183 entry->is_frag = false; 184 entry->in_use = false; 185 } 186 } 187 188 static int tc_config_knode(struct stmmac_priv *priv, 189 struct tc_cls_u32_offload *cls) 190 { 191 int ret; 192 193 ret = tc_fill_entry(priv, cls); 194 if (ret) 195 return ret; 196 197 ret = stmmac_rxp_config(priv, priv->hw->pcsr, priv->tc_entries, 198 priv->tc_entries_max); 199 if (ret) 200 goto err_unfill; 201 202 return 0; 203 204 err_unfill: 205 tc_unfill_entry(priv, cls); 206 return ret; 207 } 208 209 static int tc_delete_knode(struct stmmac_priv *priv, 210 struct tc_cls_u32_offload *cls) 211 { 212 int ret; 213 214 /* Set entry and fragments as not used */ 215 tc_unfill_entry(priv, cls); 216 217 ret = stmmac_rxp_config(priv, priv->hw->pcsr, priv->tc_entries, 218 priv->tc_entries_max); 219 if (ret) 220 return ret; 221 222 return 0; 223 } 224 225 static int tc_setup_cls_u32(struct stmmac_priv *priv, 226 struct tc_cls_u32_offload *cls) 227 { 228 switch (cls->command) { 229 case TC_CLSU32_REPLACE_KNODE: 230 tc_unfill_entry(priv, cls); 231 fallthrough; 232 case TC_CLSU32_NEW_KNODE: 233 return tc_config_knode(priv, cls); 234 case TC_CLSU32_DELETE_KNODE: 235 return tc_delete_knode(priv, cls); 236 default: 237 return -EOPNOTSUPP; 238 } 239 } 240 241 static int tc_init(struct stmmac_priv *priv) 242 { 243 struct dma_features *dma_cap = &priv->dma_cap; 244 unsigned int count; 245 int i; 246 247 if (dma_cap->l3l4fnum) { 248 priv->flow_entries_max = dma_cap->l3l4fnum; 249 priv->flow_entries = devm_kcalloc(priv->device, 250 dma_cap->l3l4fnum, 251 sizeof(*priv->flow_entries), 252 GFP_KERNEL); 253 if (!priv->flow_entries) 254 return -ENOMEM; 255 256 for (i = 0; i < priv->flow_entries_max; i++) 257 priv->flow_entries[i].idx = i; 258 259 dev_info(priv->device, "Enabled Flow TC (entries=%d)\n", 260 priv->flow_entries_max); 261 } 262 263 /* Fail silently as we can still use remaining features, e.g. CBS */ 264 if (!dma_cap->frpsel) 265 return 0; 266 267 switch (dma_cap->frpbs) { 268 case 0x0: 269 priv->tc_off_max = 64; 270 break; 271 case 0x1: 272 priv->tc_off_max = 128; 273 break; 274 case 0x2: 275 priv->tc_off_max = 256; 276 break; 277 default: 278 return -EINVAL; 279 } 280 281 switch (dma_cap->frpes) { 282 case 0x0: 283 count = 64; 284 break; 285 case 0x1: 286 count = 128; 287 break; 288 case 0x2: 289 count = 256; 290 break; 291 default: 292 return -EINVAL; 293 } 294 295 /* Reserve one last filter which lets all pass */ 296 priv->tc_entries_max = count; 297 priv->tc_entries = devm_kcalloc(priv->device, 298 count, sizeof(*priv->tc_entries), GFP_KERNEL); 299 if (!priv->tc_entries) 300 return -ENOMEM; 301 302 tc_fill_all_pass_entry(&priv->tc_entries[count - 1]); 303 304 dev_info(priv->device, "Enabling HW TC (entries=%d, max_off=%d)\n", 305 priv->tc_entries_max, priv->tc_off_max); 306 return 0; 307 } 308 309 static int tc_setup_cbs(struct stmmac_priv *priv, 310 struct tc_cbs_qopt_offload *qopt) 311 { 312 u32 tx_queues_count = priv->plat->tx_queues_to_use; 313 u32 queue = qopt->queue; 314 u32 ptr, speed_div; 315 u32 mode_to_use; 316 u64 value; 317 int ret; 318 319 /* Queue 0 is not AVB capable */ 320 if (queue <= 0 || queue >= tx_queues_count) 321 return -EINVAL; 322 if (!priv->dma_cap.av) 323 return -EOPNOTSUPP; 324 325 mode_to_use = priv->plat->tx_queues_cfg[queue].mode_to_use; 326 if (mode_to_use == MTL_QUEUE_DCB && qopt->enable) { 327 ret = stmmac_dma_qmode(priv, priv->ioaddr, queue, MTL_QUEUE_AVB); 328 if (ret) 329 return ret; 330 331 priv->plat->tx_queues_cfg[queue].mode_to_use = MTL_QUEUE_AVB; 332 } else if (!qopt->enable) { 333 return stmmac_dma_qmode(priv, priv->ioaddr, queue, MTL_QUEUE_DCB); 334 } 335 336 /* Port Transmit Rate and Speed Divider */ 337 ptr = (priv->speed == SPEED_100) ? 4 : 8; 338 speed_div = (priv->speed == SPEED_100) ? 100000 : 1000000; 339 340 /* Final adjustments for HW */ 341 value = div_s64(qopt->idleslope * 1024ll * ptr, speed_div); 342 priv->plat->tx_queues_cfg[queue].idle_slope = value & GENMASK(31, 0); 343 344 value = div_s64(-qopt->sendslope * 1024ll * ptr, speed_div); 345 priv->plat->tx_queues_cfg[queue].send_slope = value & GENMASK(31, 0); 346 347 value = qopt->hicredit * 1024ll * 8; 348 priv->plat->tx_queues_cfg[queue].high_credit = value & GENMASK(31, 0); 349 350 value = qopt->locredit * 1024ll * 8; 351 priv->plat->tx_queues_cfg[queue].low_credit = value & GENMASK(31, 0); 352 353 ret = stmmac_config_cbs(priv, priv->hw, 354 priv->plat->tx_queues_cfg[queue].send_slope, 355 priv->plat->tx_queues_cfg[queue].idle_slope, 356 priv->plat->tx_queues_cfg[queue].high_credit, 357 priv->plat->tx_queues_cfg[queue].low_credit, 358 queue); 359 if (ret) 360 return ret; 361 362 dev_info(priv->device, "CBS queue %d: send %d, idle %d, hi %d, lo %d\n", 363 queue, qopt->sendslope, qopt->idleslope, 364 qopt->hicredit, qopt->locredit); 365 return 0; 366 } 367 368 static int tc_parse_flow_actions(struct stmmac_priv *priv, 369 struct flow_action *action, 370 struct stmmac_flow_entry *entry, 371 struct netlink_ext_ack *extack) 372 { 373 struct flow_action_entry *act; 374 int i; 375 376 if (!flow_action_has_entries(action)) 377 return -EINVAL; 378 379 if (!flow_action_basic_hw_stats_check(action, extack)) 380 return -EOPNOTSUPP; 381 382 flow_action_for_each(i, act, action) { 383 switch (act->id) { 384 case FLOW_ACTION_DROP: 385 entry->action |= STMMAC_FLOW_ACTION_DROP; 386 return 0; 387 default: 388 break; 389 } 390 } 391 392 /* Nothing to do, maybe inverse filter ? */ 393 return 0; 394 } 395 396 static int tc_add_basic_flow(struct stmmac_priv *priv, 397 struct flow_cls_offload *cls, 398 struct stmmac_flow_entry *entry) 399 { 400 struct flow_rule *rule = flow_cls_offload_flow_rule(cls); 401 struct flow_dissector *dissector = rule->match.dissector; 402 struct flow_match_basic match; 403 404 /* Nothing to do here */ 405 if (!dissector_uses_key(dissector, FLOW_DISSECTOR_KEY_BASIC)) 406 return -EINVAL; 407 408 flow_rule_match_basic(rule, &match); 409 entry->ip_proto = match.key->ip_proto; 410 return 0; 411 } 412 413 static int tc_add_ip4_flow(struct stmmac_priv *priv, 414 struct flow_cls_offload *cls, 415 struct stmmac_flow_entry *entry) 416 { 417 struct flow_rule *rule = flow_cls_offload_flow_rule(cls); 418 struct flow_dissector *dissector = rule->match.dissector; 419 bool inv = entry->action & STMMAC_FLOW_ACTION_DROP; 420 struct flow_match_ipv4_addrs match; 421 u32 hw_match; 422 int ret; 423 424 /* Nothing to do here */ 425 if (!dissector_uses_key(dissector, FLOW_DISSECTOR_KEY_IPV4_ADDRS)) 426 return -EINVAL; 427 428 flow_rule_match_ipv4_addrs(rule, &match); 429 hw_match = ntohl(match.key->src) & ntohl(match.mask->src); 430 if (hw_match) { 431 ret = stmmac_config_l3_filter(priv, priv->hw, entry->idx, true, 432 false, true, inv, hw_match); 433 if (ret) 434 return ret; 435 } 436 437 hw_match = ntohl(match.key->dst) & ntohl(match.mask->dst); 438 if (hw_match) { 439 ret = stmmac_config_l3_filter(priv, priv->hw, entry->idx, true, 440 false, false, inv, hw_match); 441 if (ret) 442 return ret; 443 } 444 445 return 0; 446 } 447 448 static int tc_add_ports_flow(struct stmmac_priv *priv, 449 struct flow_cls_offload *cls, 450 struct stmmac_flow_entry *entry) 451 { 452 struct flow_rule *rule = flow_cls_offload_flow_rule(cls); 453 struct flow_dissector *dissector = rule->match.dissector; 454 bool inv = entry->action & STMMAC_FLOW_ACTION_DROP; 455 struct flow_match_ports match; 456 u32 hw_match; 457 bool is_udp; 458 int ret; 459 460 /* Nothing to do here */ 461 if (!dissector_uses_key(dissector, FLOW_DISSECTOR_KEY_PORTS)) 462 return -EINVAL; 463 464 switch (entry->ip_proto) { 465 case IPPROTO_TCP: 466 is_udp = false; 467 break; 468 case IPPROTO_UDP: 469 is_udp = true; 470 break; 471 default: 472 return -EINVAL; 473 } 474 475 flow_rule_match_ports(rule, &match); 476 477 hw_match = ntohs(match.key->src) & ntohs(match.mask->src); 478 if (hw_match) { 479 ret = stmmac_config_l4_filter(priv, priv->hw, entry->idx, true, 480 is_udp, true, inv, hw_match); 481 if (ret) 482 return ret; 483 } 484 485 hw_match = ntohs(match.key->dst) & ntohs(match.mask->dst); 486 if (hw_match) { 487 ret = stmmac_config_l4_filter(priv, priv->hw, entry->idx, true, 488 is_udp, false, inv, hw_match); 489 if (ret) 490 return ret; 491 } 492 493 entry->is_l4 = true; 494 return 0; 495 } 496 497 static struct stmmac_flow_entry *tc_find_flow(struct stmmac_priv *priv, 498 struct flow_cls_offload *cls, 499 bool get_free) 500 { 501 int i; 502 503 for (i = 0; i < priv->flow_entries_max; i++) { 504 struct stmmac_flow_entry *entry = &priv->flow_entries[i]; 505 506 if (entry->cookie == cls->cookie) 507 return entry; 508 if (get_free && (entry->in_use == false)) 509 return entry; 510 } 511 512 return NULL; 513 } 514 515 static struct { 516 int (*fn)(struct stmmac_priv *priv, struct flow_cls_offload *cls, 517 struct stmmac_flow_entry *entry); 518 } tc_flow_parsers[] = { 519 { .fn = tc_add_basic_flow }, 520 { .fn = tc_add_ip4_flow }, 521 { .fn = tc_add_ports_flow }, 522 }; 523 524 static int tc_add_flow(struct stmmac_priv *priv, 525 struct flow_cls_offload *cls) 526 { 527 struct stmmac_flow_entry *entry = tc_find_flow(priv, cls, false); 528 struct flow_rule *rule = flow_cls_offload_flow_rule(cls); 529 int i, ret; 530 531 if (!entry) { 532 entry = tc_find_flow(priv, cls, true); 533 if (!entry) 534 return -ENOENT; 535 } 536 537 ret = tc_parse_flow_actions(priv, &rule->action, entry, 538 cls->common.extack); 539 if (ret) 540 return ret; 541 542 for (i = 0; i < ARRAY_SIZE(tc_flow_parsers); i++) { 543 ret = tc_flow_parsers[i].fn(priv, cls, entry); 544 if (!ret) { 545 entry->in_use = true; 546 continue; 547 } 548 } 549 550 if (!entry->in_use) 551 return -EINVAL; 552 553 entry->cookie = cls->cookie; 554 return 0; 555 } 556 557 static int tc_del_flow(struct stmmac_priv *priv, 558 struct flow_cls_offload *cls) 559 { 560 struct stmmac_flow_entry *entry = tc_find_flow(priv, cls, false); 561 int ret; 562 563 if (!entry || !entry->in_use) 564 return -ENOENT; 565 566 if (entry->is_l4) { 567 ret = stmmac_config_l4_filter(priv, priv->hw, entry->idx, false, 568 false, false, false, 0); 569 } else { 570 ret = stmmac_config_l3_filter(priv, priv->hw, entry->idx, false, 571 false, false, false, 0); 572 } 573 574 entry->in_use = false; 575 entry->cookie = 0; 576 entry->is_l4 = false; 577 return ret; 578 } 579 580 static int tc_setup_cls(struct stmmac_priv *priv, 581 struct flow_cls_offload *cls) 582 { 583 int ret = 0; 584 585 /* When RSS is enabled, the filtering will be bypassed */ 586 if (priv->rss.enable) 587 return -EBUSY; 588 589 switch (cls->command) { 590 case FLOW_CLS_REPLACE: 591 ret = tc_add_flow(priv, cls); 592 break; 593 case FLOW_CLS_DESTROY: 594 ret = tc_del_flow(priv, cls); 595 break; 596 default: 597 return -EOPNOTSUPP; 598 } 599 600 return ret; 601 } 602 603 static int tc_setup_taprio(struct stmmac_priv *priv, 604 struct tc_taprio_qopt_offload *qopt) 605 { 606 u32 size, wid = priv->dma_cap.estwid, dep = priv->dma_cap.estdep; 607 struct plat_stmmacenet_data *plat = priv->plat; 608 struct timespec64 time; 609 bool fpe = false; 610 int i, ret = 0; 611 u64 ctr; 612 613 if (!priv->dma_cap.estsel) 614 return -EOPNOTSUPP; 615 616 switch (wid) { 617 case 0x1: 618 wid = 16; 619 break; 620 case 0x2: 621 wid = 20; 622 break; 623 case 0x3: 624 wid = 24; 625 break; 626 default: 627 return -EOPNOTSUPP; 628 } 629 630 switch (dep) { 631 case 0x1: 632 dep = 64; 633 break; 634 case 0x2: 635 dep = 128; 636 break; 637 case 0x3: 638 dep = 256; 639 break; 640 case 0x4: 641 dep = 512; 642 break; 643 case 0x5: 644 dep = 1024; 645 break; 646 default: 647 return -EOPNOTSUPP; 648 } 649 650 if (!qopt->enable) 651 goto disable; 652 if (qopt->num_entries >= dep) 653 return -EINVAL; 654 if (!qopt->base_time) 655 return -ERANGE; 656 if (!qopt->cycle_time) 657 return -ERANGE; 658 659 if (!plat->est) { 660 plat->est = devm_kzalloc(priv->device, sizeof(*plat->est), 661 GFP_KERNEL); 662 if (!plat->est) 663 return -ENOMEM; 664 } else { 665 memset(plat->est, 0, sizeof(*plat->est)); 666 } 667 668 size = qopt->num_entries; 669 670 priv->plat->est->gcl_size = size; 671 priv->plat->est->enable = qopt->enable; 672 673 for (i = 0; i < size; i++) { 674 s64 delta_ns = qopt->entries[i].interval; 675 u32 gates = qopt->entries[i].gate_mask; 676 677 if (delta_ns > GENMASK(wid, 0)) 678 return -ERANGE; 679 if (gates > GENMASK(31 - wid, 0)) 680 return -ERANGE; 681 682 switch (qopt->entries[i].command) { 683 case TC_TAPRIO_CMD_SET_GATES: 684 if (fpe) 685 return -EINVAL; 686 break; 687 case TC_TAPRIO_CMD_SET_AND_HOLD: 688 gates |= BIT(0); 689 fpe = true; 690 break; 691 case TC_TAPRIO_CMD_SET_AND_RELEASE: 692 gates &= ~BIT(0); 693 fpe = true; 694 break; 695 default: 696 return -EOPNOTSUPP; 697 } 698 699 priv->plat->est->gcl[i] = delta_ns | (gates << wid); 700 } 701 702 /* Adjust for real system time */ 703 time = ktime_to_timespec64(qopt->base_time); 704 priv->plat->est->btr[0] = (u32)time.tv_nsec; 705 priv->plat->est->btr[1] = (u32)time.tv_sec; 706 707 ctr = qopt->cycle_time; 708 priv->plat->est->ctr[0] = do_div(ctr, NSEC_PER_SEC); 709 priv->plat->est->ctr[1] = (u32)ctr; 710 711 if (fpe && !priv->dma_cap.fpesel) 712 return -EOPNOTSUPP; 713 714 ret = stmmac_fpe_configure(priv, priv->ioaddr, 715 priv->plat->tx_queues_to_use, 716 priv->plat->rx_queues_to_use, fpe); 717 if (ret && fpe) { 718 netdev_err(priv->dev, "failed to enable Frame Preemption\n"); 719 return ret; 720 } 721 722 ret = stmmac_est_configure(priv, priv->ioaddr, priv->plat->est, 723 priv->plat->clk_ptp_rate); 724 if (ret) { 725 netdev_err(priv->dev, "failed to configure EST\n"); 726 goto disable; 727 } 728 729 netdev_info(priv->dev, "configured EST\n"); 730 return 0; 731 732 disable: 733 priv->plat->est->enable = false; 734 stmmac_est_configure(priv, priv->ioaddr, priv->plat->est, 735 priv->plat->clk_ptp_rate); 736 return ret; 737 } 738 739 static int tc_setup_etf(struct stmmac_priv *priv, 740 struct tc_etf_qopt_offload *qopt) 741 { 742 if (!priv->dma_cap.tbssel) 743 return -EOPNOTSUPP; 744 if (qopt->queue >= priv->plat->tx_queues_to_use) 745 return -EINVAL; 746 if (!(priv->tx_queue[qopt->queue].tbs & STMMAC_TBS_AVAIL)) 747 return -EINVAL; 748 749 if (qopt->enable) 750 priv->tx_queue[qopt->queue].tbs |= STMMAC_TBS_EN; 751 else 752 priv->tx_queue[qopt->queue].tbs &= ~STMMAC_TBS_EN; 753 754 netdev_info(priv->dev, "%s ETF for Queue %d\n", 755 qopt->enable ? "enabled" : "disabled", qopt->queue); 756 return 0; 757 } 758 759 const struct stmmac_tc_ops dwmac510_tc_ops = { 760 .init = tc_init, 761 .setup_cls_u32 = tc_setup_cls_u32, 762 .setup_cbs = tc_setup_cbs, 763 .setup_cls = tc_setup_cls, 764 .setup_taprio = tc_setup_taprio, 765 .setup_etf = tc_setup_etf, 766 }; 767