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 /* Set entry and fragments as not used */ 213 tc_unfill_entry(priv, cls); 214 215 return stmmac_rxp_config(priv, priv->hw->pcsr, priv->tc_entries, 216 priv->tc_entries_max); 217 } 218 219 static int tc_setup_cls_u32(struct stmmac_priv *priv, 220 struct tc_cls_u32_offload *cls) 221 { 222 switch (cls->command) { 223 case TC_CLSU32_REPLACE_KNODE: 224 tc_unfill_entry(priv, cls); 225 fallthrough; 226 case TC_CLSU32_NEW_KNODE: 227 return tc_config_knode(priv, cls); 228 case TC_CLSU32_DELETE_KNODE: 229 return tc_delete_knode(priv, cls); 230 default: 231 return -EOPNOTSUPP; 232 } 233 } 234 235 static int tc_rfs_init(struct stmmac_priv *priv) 236 { 237 int i; 238 239 priv->rfs_entries_max[STMMAC_RFS_T_VLAN] = 8; 240 priv->rfs_entries_max[STMMAC_RFS_T_LLDP] = 1; 241 priv->rfs_entries_max[STMMAC_RFS_T_1588] = 1; 242 243 for (i = 0; i < STMMAC_RFS_T_MAX; i++) 244 priv->rfs_entries_total += priv->rfs_entries_max[i]; 245 246 priv->rfs_entries = devm_kcalloc(priv->device, 247 priv->rfs_entries_total, 248 sizeof(*priv->rfs_entries), 249 GFP_KERNEL); 250 if (!priv->rfs_entries) 251 return -ENOMEM; 252 253 dev_info(priv->device, "Enabled RFS Flow TC (entries=%d)\n", 254 priv->rfs_entries_total); 255 256 return 0; 257 } 258 259 static int tc_init(struct stmmac_priv *priv) 260 { 261 struct dma_features *dma_cap = &priv->dma_cap; 262 unsigned int count; 263 int ret, i; 264 265 if (dma_cap->l3l4fnum) { 266 priv->flow_entries_max = dma_cap->l3l4fnum; 267 priv->flow_entries = devm_kcalloc(priv->device, 268 dma_cap->l3l4fnum, 269 sizeof(*priv->flow_entries), 270 GFP_KERNEL); 271 if (!priv->flow_entries) 272 return -ENOMEM; 273 274 for (i = 0; i < priv->flow_entries_max; i++) 275 priv->flow_entries[i].idx = i; 276 277 dev_info(priv->device, "Enabled L3L4 Flow TC (entries=%d)\n", 278 priv->flow_entries_max); 279 } 280 281 ret = tc_rfs_init(priv); 282 if (ret) 283 return -ENOMEM; 284 285 if (!priv->plat->fpe_cfg) { 286 priv->plat->fpe_cfg = devm_kzalloc(priv->device, 287 sizeof(*priv->plat->fpe_cfg), 288 GFP_KERNEL); 289 if (!priv->plat->fpe_cfg) 290 return -ENOMEM; 291 } else { 292 memset(priv->plat->fpe_cfg, 0, sizeof(*priv->plat->fpe_cfg)); 293 } 294 295 /* Fail silently as we can still use remaining features, e.g. CBS */ 296 if (!dma_cap->frpsel) 297 return 0; 298 299 switch (dma_cap->frpbs) { 300 case 0x0: 301 priv->tc_off_max = 64; 302 break; 303 case 0x1: 304 priv->tc_off_max = 128; 305 break; 306 case 0x2: 307 priv->tc_off_max = 256; 308 break; 309 default: 310 return -EINVAL; 311 } 312 313 switch (dma_cap->frpes) { 314 case 0x0: 315 count = 64; 316 break; 317 case 0x1: 318 count = 128; 319 break; 320 case 0x2: 321 count = 256; 322 break; 323 default: 324 return -EINVAL; 325 } 326 327 /* Reserve one last filter which lets all pass */ 328 priv->tc_entries_max = count; 329 priv->tc_entries = devm_kcalloc(priv->device, 330 count, sizeof(*priv->tc_entries), GFP_KERNEL); 331 if (!priv->tc_entries) 332 return -ENOMEM; 333 334 tc_fill_all_pass_entry(&priv->tc_entries[count - 1]); 335 336 dev_info(priv->device, "Enabling HW TC (entries=%d, max_off=%d)\n", 337 priv->tc_entries_max, priv->tc_off_max); 338 339 return 0; 340 } 341 342 static int tc_setup_cbs(struct stmmac_priv *priv, 343 struct tc_cbs_qopt_offload *qopt) 344 { 345 u32 tx_queues_count = priv->plat->tx_queues_to_use; 346 u32 queue = qopt->queue; 347 u32 ptr, speed_div; 348 u32 mode_to_use; 349 u64 value; 350 int ret; 351 352 /* Queue 0 is not AVB capable */ 353 if (queue <= 0 || queue >= tx_queues_count) 354 return -EINVAL; 355 if (!priv->dma_cap.av) 356 return -EOPNOTSUPP; 357 358 /* Port Transmit Rate and Speed Divider */ 359 switch (priv->speed) { 360 case SPEED_10000: 361 ptr = 32; 362 speed_div = 10000000; 363 break; 364 case SPEED_5000: 365 ptr = 32; 366 speed_div = 5000000; 367 break; 368 case SPEED_2500: 369 ptr = 8; 370 speed_div = 2500000; 371 break; 372 case SPEED_1000: 373 ptr = 8; 374 speed_div = 1000000; 375 break; 376 case SPEED_100: 377 ptr = 4; 378 speed_div = 100000; 379 break; 380 default: 381 return -EOPNOTSUPP; 382 } 383 384 mode_to_use = priv->plat->tx_queues_cfg[queue].mode_to_use; 385 if (mode_to_use == MTL_QUEUE_DCB && qopt->enable) { 386 ret = stmmac_dma_qmode(priv, priv->ioaddr, queue, MTL_QUEUE_AVB); 387 if (ret) 388 return ret; 389 390 priv->plat->tx_queues_cfg[queue].mode_to_use = MTL_QUEUE_AVB; 391 } else if (!qopt->enable) { 392 ret = stmmac_dma_qmode(priv, priv->ioaddr, queue, 393 MTL_QUEUE_DCB); 394 if (ret) 395 return ret; 396 397 priv->plat->tx_queues_cfg[queue].mode_to_use = MTL_QUEUE_DCB; 398 } 399 400 /* Final adjustments for HW */ 401 value = div_s64(qopt->idleslope * 1024ll * ptr, speed_div); 402 priv->plat->tx_queues_cfg[queue].idle_slope = value & GENMASK(31, 0); 403 404 value = div_s64(-qopt->sendslope * 1024ll * ptr, speed_div); 405 priv->plat->tx_queues_cfg[queue].send_slope = value & GENMASK(31, 0); 406 407 value = qopt->hicredit * 1024ll * 8; 408 priv->plat->tx_queues_cfg[queue].high_credit = value & GENMASK(31, 0); 409 410 value = qopt->locredit * 1024ll * 8; 411 priv->plat->tx_queues_cfg[queue].low_credit = value & GENMASK(31, 0); 412 413 ret = stmmac_config_cbs(priv, priv->hw, 414 priv->plat->tx_queues_cfg[queue].send_slope, 415 priv->plat->tx_queues_cfg[queue].idle_slope, 416 priv->plat->tx_queues_cfg[queue].high_credit, 417 priv->plat->tx_queues_cfg[queue].low_credit, 418 queue); 419 if (ret) 420 return ret; 421 422 dev_info(priv->device, "CBS queue %d: send %d, idle %d, hi %d, lo %d\n", 423 queue, qopt->sendslope, qopt->idleslope, 424 qopt->hicredit, qopt->locredit); 425 return 0; 426 } 427 428 static int tc_parse_flow_actions(struct stmmac_priv *priv, 429 struct flow_action *action, 430 struct stmmac_flow_entry *entry, 431 struct netlink_ext_ack *extack) 432 { 433 struct flow_action_entry *act; 434 int i; 435 436 if (!flow_action_has_entries(action)) 437 return -EINVAL; 438 439 if (!flow_action_basic_hw_stats_check(action, extack)) 440 return -EOPNOTSUPP; 441 442 flow_action_for_each(i, act, action) { 443 switch (act->id) { 444 case FLOW_ACTION_DROP: 445 entry->action |= STMMAC_FLOW_ACTION_DROP; 446 return 0; 447 default: 448 break; 449 } 450 } 451 452 /* Nothing to do, maybe inverse filter ? */ 453 return 0; 454 } 455 456 #define ETHER_TYPE_FULL_MASK cpu_to_be16(~0) 457 458 static int tc_add_basic_flow(struct stmmac_priv *priv, 459 struct flow_cls_offload *cls, 460 struct stmmac_flow_entry *entry) 461 { 462 struct flow_rule *rule = flow_cls_offload_flow_rule(cls); 463 struct flow_dissector *dissector = rule->match.dissector; 464 struct flow_match_basic match; 465 466 /* Nothing to do here */ 467 if (!dissector_uses_key(dissector, FLOW_DISSECTOR_KEY_BASIC)) 468 return -EINVAL; 469 470 flow_rule_match_basic(rule, &match); 471 472 entry->ip_proto = match.key->ip_proto; 473 return 0; 474 } 475 476 static int tc_add_ip4_flow(struct stmmac_priv *priv, 477 struct flow_cls_offload *cls, 478 struct stmmac_flow_entry *entry) 479 { 480 struct flow_rule *rule = flow_cls_offload_flow_rule(cls); 481 struct flow_dissector *dissector = rule->match.dissector; 482 bool inv = entry->action & STMMAC_FLOW_ACTION_DROP; 483 struct flow_match_ipv4_addrs match; 484 u32 hw_match; 485 int ret; 486 487 /* Nothing to do here */ 488 if (!dissector_uses_key(dissector, FLOW_DISSECTOR_KEY_IPV4_ADDRS)) 489 return -EINVAL; 490 491 flow_rule_match_ipv4_addrs(rule, &match); 492 hw_match = ntohl(match.key->src) & ntohl(match.mask->src); 493 if (hw_match) { 494 ret = stmmac_config_l3_filter(priv, priv->hw, entry->idx, true, 495 false, true, inv, hw_match); 496 if (ret) 497 return ret; 498 } 499 500 hw_match = ntohl(match.key->dst) & ntohl(match.mask->dst); 501 if (hw_match) { 502 ret = stmmac_config_l3_filter(priv, priv->hw, entry->idx, true, 503 false, false, inv, hw_match); 504 if (ret) 505 return ret; 506 } 507 508 return 0; 509 } 510 511 static int tc_add_ports_flow(struct stmmac_priv *priv, 512 struct flow_cls_offload *cls, 513 struct stmmac_flow_entry *entry) 514 { 515 struct flow_rule *rule = flow_cls_offload_flow_rule(cls); 516 struct flow_dissector *dissector = rule->match.dissector; 517 bool inv = entry->action & STMMAC_FLOW_ACTION_DROP; 518 struct flow_match_ports match; 519 u32 hw_match; 520 bool is_udp; 521 int ret; 522 523 /* Nothing to do here */ 524 if (!dissector_uses_key(dissector, FLOW_DISSECTOR_KEY_PORTS)) 525 return -EINVAL; 526 527 switch (entry->ip_proto) { 528 case IPPROTO_TCP: 529 is_udp = false; 530 break; 531 case IPPROTO_UDP: 532 is_udp = true; 533 break; 534 default: 535 return -EINVAL; 536 } 537 538 flow_rule_match_ports(rule, &match); 539 540 hw_match = ntohs(match.key->src) & ntohs(match.mask->src); 541 if (hw_match) { 542 ret = stmmac_config_l4_filter(priv, priv->hw, entry->idx, true, 543 is_udp, true, inv, hw_match); 544 if (ret) 545 return ret; 546 } 547 548 hw_match = ntohs(match.key->dst) & ntohs(match.mask->dst); 549 if (hw_match) { 550 ret = stmmac_config_l4_filter(priv, priv->hw, entry->idx, true, 551 is_udp, false, inv, hw_match); 552 if (ret) 553 return ret; 554 } 555 556 entry->is_l4 = true; 557 return 0; 558 } 559 560 static struct stmmac_flow_entry *tc_find_flow(struct stmmac_priv *priv, 561 struct flow_cls_offload *cls, 562 bool get_free) 563 { 564 int i; 565 566 for (i = 0; i < priv->flow_entries_max; i++) { 567 struct stmmac_flow_entry *entry = &priv->flow_entries[i]; 568 569 if (entry->cookie == cls->cookie) 570 return entry; 571 if (get_free && (entry->in_use == false)) 572 return entry; 573 } 574 575 return NULL; 576 } 577 578 static struct { 579 int (*fn)(struct stmmac_priv *priv, struct flow_cls_offload *cls, 580 struct stmmac_flow_entry *entry); 581 } tc_flow_parsers[] = { 582 { .fn = tc_add_basic_flow }, 583 { .fn = tc_add_ip4_flow }, 584 { .fn = tc_add_ports_flow }, 585 }; 586 587 static int tc_add_flow(struct stmmac_priv *priv, 588 struct flow_cls_offload *cls) 589 { 590 struct stmmac_flow_entry *entry = tc_find_flow(priv, cls, false); 591 struct flow_rule *rule = flow_cls_offload_flow_rule(cls); 592 int i, ret; 593 594 if (!entry) { 595 entry = tc_find_flow(priv, cls, true); 596 if (!entry) 597 return -ENOENT; 598 } 599 600 ret = tc_parse_flow_actions(priv, &rule->action, entry, 601 cls->common.extack); 602 if (ret) 603 return ret; 604 605 for (i = 0; i < ARRAY_SIZE(tc_flow_parsers); i++) { 606 ret = tc_flow_parsers[i].fn(priv, cls, entry); 607 if (!ret) 608 entry->in_use = true; 609 } 610 611 if (!entry->in_use) 612 return -EINVAL; 613 614 entry->cookie = cls->cookie; 615 return 0; 616 } 617 618 static int tc_del_flow(struct stmmac_priv *priv, 619 struct flow_cls_offload *cls) 620 { 621 struct stmmac_flow_entry *entry = tc_find_flow(priv, cls, false); 622 int ret; 623 624 if (!entry || !entry->in_use) 625 return -ENOENT; 626 627 if (entry->is_l4) { 628 ret = stmmac_config_l4_filter(priv, priv->hw, entry->idx, false, 629 false, false, false, 0); 630 } else { 631 ret = stmmac_config_l3_filter(priv, priv->hw, entry->idx, false, 632 false, false, false, 0); 633 } 634 635 entry->in_use = false; 636 entry->cookie = 0; 637 entry->is_l4 = false; 638 return ret; 639 } 640 641 static struct stmmac_rfs_entry *tc_find_rfs(struct stmmac_priv *priv, 642 struct flow_cls_offload *cls, 643 bool get_free) 644 { 645 int i; 646 647 for (i = 0; i < priv->rfs_entries_total; i++) { 648 struct stmmac_rfs_entry *entry = &priv->rfs_entries[i]; 649 650 if (entry->cookie == cls->cookie) 651 return entry; 652 if (get_free && entry->in_use == false) 653 return entry; 654 } 655 656 return NULL; 657 } 658 659 #define VLAN_PRIO_FULL_MASK (0x07) 660 661 static int tc_add_vlan_flow(struct stmmac_priv *priv, 662 struct flow_cls_offload *cls) 663 { 664 struct stmmac_rfs_entry *entry = tc_find_rfs(priv, cls, false); 665 struct flow_rule *rule = flow_cls_offload_flow_rule(cls); 666 struct flow_dissector *dissector = rule->match.dissector; 667 int tc = tc_classid_to_hwtc(priv->dev, cls->classid); 668 struct flow_match_vlan match; 669 670 if (!entry) { 671 entry = tc_find_rfs(priv, cls, true); 672 if (!entry) 673 return -ENOENT; 674 } 675 676 if (priv->rfs_entries_cnt[STMMAC_RFS_T_VLAN] >= 677 priv->rfs_entries_max[STMMAC_RFS_T_VLAN]) 678 return -ENOENT; 679 680 /* Nothing to do here */ 681 if (!dissector_uses_key(dissector, FLOW_DISSECTOR_KEY_VLAN)) 682 return -EINVAL; 683 684 if (tc < 0) { 685 netdev_err(priv->dev, "Invalid traffic class\n"); 686 return -EINVAL; 687 } 688 689 flow_rule_match_vlan(rule, &match); 690 691 if (match.mask->vlan_priority) { 692 u32 prio; 693 694 if (match.mask->vlan_priority != VLAN_PRIO_FULL_MASK) { 695 netdev_err(priv->dev, "Only full mask is supported for VLAN priority"); 696 return -EINVAL; 697 } 698 699 prio = BIT(match.key->vlan_priority); 700 stmmac_rx_queue_prio(priv, priv->hw, prio, tc); 701 702 entry->in_use = true; 703 entry->cookie = cls->cookie; 704 entry->tc = tc; 705 entry->type = STMMAC_RFS_T_VLAN; 706 priv->rfs_entries_cnt[STMMAC_RFS_T_VLAN]++; 707 } 708 709 return 0; 710 } 711 712 static int tc_del_vlan_flow(struct stmmac_priv *priv, 713 struct flow_cls_offload *cls) 714 { 715 struct stmmac_rfs_entry *entry = tc_find_rfs(priv, cls, false); 716 717 if (!entry || !entry->in_use || entry->type != STMMAC_RFS_T_VLAN) 718 return -ENOENT; 719 720 stmmac_rx_queue_prio(priv, priv->hw, 0, entry->tc); 721 722 entry->in_use = false; 723 entry->cookie = 0; 724 entry->tc = 0; 725 entry->type = 0; 726 727 priv->rfs_entries_cnt[STMMAC_RFS_T_VLAN]--; 728 729 return 0; 730 } 731 732 static int tc_add_ethtype_flow(struct stmmac_priv *priv, 733 struct flow_cls_offload *cls) 734 { 735 struct stmmac_rfs_entry *entry = tc_find_rfs(priv, cls, false); 736 struct flow_rule *rule = flow_cls_offload_flow_rule(cls); 737 struct flow_dissector *dissector = rule->match.dissector; 738 int tc = tc_classid_to_hwtc(priv->dev, cls->classid); 739 struct flow_match_basic match; 740 741 if (!entry) { 742 entry = tc_find_rfs(priv, cls, true); 743 if (!entry) 744 return -ENOENT; 745 } 746 747 /* Nothing to do here */ 748 if (!dissector_uses_key(dissector, FLOW_DISSECTOR_KEY_BASIC)) 749 return -EINVAL; 750 751 if (tc < 0) { 752 netdev_err(priv->dev, "Invalid traffic class\n"); 753 return -EINVAL; 754 } 755 756 flow_rule_match_basic(rule, &match); 757 758 if (match.mask->n_proto) { 759 u16 etype = ntohs(match.key->n_proto); 760 761 if (match.mask->n_proto != ETHER_TYPE_FULL_MASK) { 762 netdev_err(priv->dev, "Only full mask is supported for EthType filter"); 763 return -EINVAL; 764 } 765 switch (etype) { 766 case ETH_P_LLDP: 767 if (priv->rfs_entries_cnt[STMMAC_RFS_T_LLDP] >= 768 priv->rfs_entries_max[STMMAC_RFS_T_LLDP]) 769 return -ENOENT; 770 771 entry->type = STMMAC_RFS_T_LLDP; 772 priv->rfs_entries_cnt[STMMAC_RFS_T_LLDP]++; 773 774 stmmac_rx_queue_routing(priv, priv->hw, 775 PACKET_DCBCPQ, tc); 776 break; 777 case ETH_P_1588: 778 if (priv->rfs_entries_cnt[STMMAC_RFS_T_1588] >= 779 priv->rfs_entries_max[STMMAC_RFS_T_1588]) 780 return -ENOENT; 781 782 entry->type = STMMAC_RFS_T_1588; 783 priv->rfs_entries_cnt[STMMAC_RFS_T_1588]++; 784 785 stmmac_rx_queue_routing(priv, priv->hw, 786 PACKET_PTPQ, tc); 787 break; 788 default: 789 netdev_err(priv->dev, "EthType(0x%x) is not supported", etype); 790 return -EINVAL; 791 } 792 793 entry->in_use = true; 794 entry->cookie = cls->cookie; 795 entry->tc = tc; 796 entry->etype = etype; 797 798 return 0; 799 } 800 801 return -EINVAL; 802 } 803 804 static int tc_del_ethtype_flow(struct stmmac_priv *priv, 805 struct flow_cls_offload *cls) 806 { 807 struct stmmac_rfs_entry *entry = tc_find_rfs(priv, cls, false); 808 809 if (!entry || !entry->in_use || 810 entry->type < STMMAC_RFS_T_LLDP || 811 entry->type > STMMAC_RFS_T_1588) 812 return -ENOENT; 813 814 switch (entry->etype) { 815 case ETH_P_LLDP: 816 stmmac_rx_queue_routing(priv, priv->hw, 817 PACKET_DCBCPQ, 0); 818 priv->rfs_entries_cnt[STMMAC_RFS_T_LLDP]--; 819 break; 820 case ETH_P_1588: 821 stmmac_rx_queue_routing(priv, priv->hw, 822 PACKET_PTPQ, 0); 823 priv->rfs_entries_cnt[STMMAC_RFS_T_1588]--; 824 break; 825 default: 826 netdev_err(priv->dev, "EthType(0x%x) is not supported", 827 entry->etype); 828 return -EINVAL; 829 } 830 831 entry->in_use = false; 832 entry->cookie = 0; 833 entry->tc = 0; 834 entry->etype = 0; 835 entry->type = 0; 836 837 return 0; 838 } 839 840 static int tc_add_flow_cls(struct stmmac_priv *priv, 841 struct flow_cls_offload *cls) 842 { 843 int ret; 844 845 ret = tc_add_flow(priv, cls); 846 if (!ret) 847 return ret; 848 849 ret = tc_add_ethtype_flow(priv, cls); 850 if (!ret) 851 return ret; 852 853 return tc_add_vlan_flow(priv, cls); 854 } 855 856 static int tc_del_flow_cls(struct stmmac_priv *priv, 857 struct flow_cls_offload *cls) 858 { 859 int ret; 860 861 ret = tc_del_flow(priv, cls); 862 if (!ret) 863 return ret; 864 865 ret = tc_del_ethtype_flow(priv, cls); 866 if (!ret) 867 return ret; 868 869 return tc_del_vlan_flow(priv, cls); 870 } 871 872 static int tc_setup_cls(struct stmmac_priv *priv, 873 struct flow_cls_offload *cls) 874 { 875 int ret = 0; 876 877 /* When RSS is enabled, the filtering will be bypassed */ 878 if (priv->rss.enable) 879 return -EBUSY; 880 881 switch (cls->command) { 882 case FLOW_CLS_REPLACE: 883 ret = tc_add_flow_cls(priv, cls); 884 break; 885 case FLOW_CLS_DESTROY: 886 ret = tc_del_flow_cls(priv, cls); 887 break; 888 default: 889 return -EOPNOTSUPP; 890 } 891 892 return ret; 893 } 894 895 struct timespec64 stmmac_calc_tas_basetime(ktime_t old_base_time, 896 ktime_t current_time, 897 u64 cycle_time) 898 { 899 struct timespec64 time; 900 901 if (ktime_after(old_base_time, current_time)) { 902 time = ktime_to_timespec64(old_base_time); 903 } else { 904 s64 n; 905 ktime_t base_time; 906 907 n = div64_s64(ktime_sub_ns(current_time, old_base_time), 908 cycle_time); 909 base_time = ktime_add_ns(old_base_time, 910 (n + 1) * cycle_time); 911 912 time = ktime_to_timespec64(base_time); 913 } 914 915 return time; 916 } 917 918 static int tc_setup_taprio(struct stmmac_priv *priv, 919 struct tc_taprio_qopt_offload *qopt) 920 { 921 u32 size, wid = priv->dma_cap.estwid, dep = priv->dma_cap.estdep; 922 struct plat_stmmacenet_data *plat = priv->plat; 923 struct timespec64 time, current_time, qopt_time; 924 ktime_t current_time_ns; 925 bool fpe = false; 926 int i, ret = 0; 927 u64 ctr; 928 929 if (qopt->base_time < 0) 930 return -ERANGE; 931 932 if (!priv->dma_cap.estsel) 933 return -EOPNOTSUPP; 934 935 switch (wid) { 936 case 0x1: 937 wid = 16; 938 break; 939 case 0x2: 940 wid = 20; 941 break; 942 case 0x3: 943 wid = 24; 944 break; 945 default: 946 return -EOPNOTSUPP; 947 } 948 949 switch (dep) { 950 case 0x1: 951 dep = 64; 952 break; 953 case 0x2: 954 dep = 128; 955 break; 956 case 0x3: 957 dep = 256; 958 break; 959 case 0x4: 960 dep = 512; 961 break; 962 case 0x5: 963 dep = 1024; 964 break; 965 default: 966 return -EOPNOTSUPP; 967 } 968 969 if (!qopt->enable) 970 goto disable; 971 if (qopt->num_entries >= dep) 972 return -EINVAL; 973 if (!qopt->cycle_time) 974 return -ERANGE; 975 976 if (!plat->est) { 977 plat->est = devm_kzalloc(priv->device, sizeof(*plat->est), 978 GFP_KERNEL); 979 if (!plat->est) 980 return -ENOMEM; 981 982 mutex_init(&priv->plat->est->lock); 983 } else { 984 memset(plat->est, 0, sizeof(*plat->est)); 985 } 986 987 size = qopt->num_entries; 988 989 mutex_lock(&priv->plat->est->lock); 990 priv->plat->est->gcl_size = size; 991 priv->plat->est->enable = qopt->enable; 992 mutex_unlock(&priv->plat->est->lock); 993 994 for (i = 0; i < size; i++) { 995 s64 delta_ns = qopt->entries[i].interval; 996 u32 gates = qopt->entries[i].gate_mask; 997 998 if (delta_ns > GENMASK(wid, 0)) 999 return -ERANGE; 1000 if (gates > GENMASK(31 - wid, 0)) 1001 return -ERANGE; 1002 1003 switch (qopt->entries[i].command) { 1004 case TC_TAPRIO_CMD_SET_GATES: 1005 if (fpe) 1006 return -EINVAL; 1007 break; 1008 case TC_TAPRIO_CMD_SET_AND_HOLD: 1009 gates |= BIT(0); 1010 fpe = true; 1011 break; 1012 case TC_TAPRIO_CMD_SET_AND_RELEASE: 1013 gates &= ~BIT(0); 1014 fpe = true; 1015 break; 1016 default: 1017 return -EOPNOTSUPP; 1018 } 1019 1020 priv->plat->est->gcl[i] = delta_ns | (gates << wid); 1021 } 1022 1023 mutex_lock(&priv->plat->est->lock); 1024 /* Adjust for real system time */ 1025 priv->ptp_clock_ops.gettime64(&priv->ptp_clock_ops, ¤t_time); 1026 current_time_ns = timespec64_to_ktime(current_time); 1027 time = stmmac_calc_tas_basetime(qopt->base_time, current_time_ns, 1028 qopt->cycle_time); 1029 1030 priv->plat->est->btr[0] = (u32)time.tv_nsec; 1031 priv->plat->est->btr[1] = (u32)time.tv_sec; 1032 1033 qopt_time = ktime_to_timespec64(qopt->base_time); 1034 priv->plat->est->btr_reserve[0] = (u32)qopt_time.tv_nsec; 1035 priv->plat->est->btr_reserve[1] = (u32)qopt_time.tv_sec; 1036 1037 ctr = qopt->cycle_time; 1038 priv->plat->est->ctr[0] = do_div(ctr, NSEC_PER_SEC); 1039 priv->plat->est->ctr[1] = (u32)ctr; 1040 1041 if (fpe && !priv->dma_cap.fpesel) { 1042 mutex_unlock(&priv->plat->est->lock); 1043 return -EOPNOTSUPP; 1044 } 1045 1046 /* Actual FPE register configuration will be done after FPE handshake 1047 * is success. 1048 */ 1049 priv->plat->fpe_cfg->enable = fpe; 1050 1051 ret = stmmac_est_configure(priv, priv->ioaddr, priv->plat->est, 1052 priv->plat->clk_ptp_rate); 1053 mutex_unlock(&priv->plat->est->lock); 1054 if (ret) { 1055 netdev_err(priv->dev, "failed to configure EST\n"); 1056 goto disable; 1057 } 1058 1059 netdev_info(priv->dev, "configured EST\n"); 1060 1061 if (fpe) { 1062 stmmac_fpe_handshake(priv, true); 1063 netdev_info(priv->dev, "start FPE handshake\n"); 1064 } 1065 1066 return 0; 1067 1068 disable: 1069 if (priv->plat->est) { 1070 mutex_lock(&priv->plat->est->lock); 1071 priv->plat->est->enable = false; 1072 stmmac_est_configure(priv, priv->ioaddr, priv->plat->est, 1073 priv->plat->clk_ptp_rate); 1074 mutex_unlock(&priv->plat->est->lock); 1075 } 1076 1077 priv->plat->fpe_cfg->enable = false; 1078 stmmac_fpe_configure(priv, priv->ioaddr, 1079 priv->plat->tx_queues_to_use, 1080 priv->plat->rx_queues_to_use, 1081 false); 1082 netdev_info(priv->dev, "disabled FPE\n"); 1083 1084 stmmac_fpe_handshake(priv, false); 1085 netdev_info(priv->dev, "stop FPE handshake\n"); 1086 1087 return ret; 1088 } 1089 1090 static int tc_setup_etf(struct stmmac_priv *priv, 1091 struct tc_etf_qopt_offload *qopt) 1092 { 1093 if (!priv->dma_cap.tbssel) 1094 return -EOPNOTSUPP; 1095 if (qopt->queue >= priv->plat->tx_queues_to_use) 1096 return -EINVAL; 1097 if (!(priv->dma_conf.tx_queue[qopt->queue].tbs & STMMAC_TBS_AVAIL)) 1098 return -EINVAL; 1099 1100 if (qopt->enable) 1101 priv->dma_conf.tx_queue[qopt->queue].tbs |= STMMAC_TBS_EN; 1102 else 1103 priv->dma_conf.tx_queue[qopt->queue].tbs &= ~STMMAC_TBS_EN; 1104 1105 netdev_info(priv->dev, "%s ETF for Queue %d\n", 1106 qopt->enable ? "enabled" : "disabled", qopt->queue); 1107 return 0; 1108 } 1109 1110 const struct stmmac_tc_ops dwmac510_tc_ops = { 1111 .init = tc_init, 1112 .setup_cls_u32 = tc_setup_cls_u32, 1113 .setup_cbs = tc_setup_cbs, 1114 .setup_cls = tc_setup_cls, 1115 .setup_taprio = tc_setup_taprio, 1116 .setup_etf = tc_setup_etf, 1117 }; 1118