drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c

   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_init(struct stmmac_priv *priv)
 236 {
 237         struct dma_features *dma_cap = &priv->dma_cap;
 238         unsigned int count;
 239         int i;
 240
 241         if (dma_cap->l3l4fnum) {
 242                 priv->flow_entries_max = dma_cap->l3l4fnum;
 243                 priv->flow_entries = devm_kcalloc(priv->device,
 244                                                   dma_cap->l3l4fnum,
 245                                                   sizeof(*priv->flow_entries),
 246                                                   GFP_KERNEL);
 247                 if (!priv->flow_entries)
 248                         return -ENOMEM;
 249
 250                 for (i = 0; i < priv->flow_entries_max; i++)
 251                         priv->flow_entries[i].idx = i;
 252
 253                 dev_info(priv->device, "Enabled Flow TC (entries=%d)\n",
 254                          priv->flow_entries_max);
 255         }
 256
 257         if (!priv->plat->fpe_cfg) {
 258                 priv->plat->fpe_cfg = devm_kzalloc(priv->device,
 259                                                    sizeof(*priv->plat->fpe_cfg),
 260                                                    GFP_KERNEL);
 261                 if (!priv->plat->fpe_cfg)
 262                         return -ENOMEM;
 263         } else {
 264                 memset(priv->plat->fpe_cfg, 0, sizeof(*priv->plat->fpe_cfg));
 265         }
 266
 267         /* Fail silently as we can still use remaining features, e.g. CBS */
 268         if (!dma_cap->frpsel)
 269                 return 0;
 270
 271         switch (dma_cap->frpbs) {
 272         case 0x0:
 273                 priv->tc_off_max = 64;
 274                 break;
 275         case 0x1:
 276                 priv->tc_off_max = 128;
 277                 break;
 278         case 0x2:
 279                 priv->tc_off_max = 256;
 280                 break;
 281         default:
 282                 return -EINVAL;
 283         }
 284
 285         switch (dma_cap->frpes) {
 286         case 0x0:
 287                 count = 64;
 288                 break;
 289         case 0x1:
 290                 count = 128;
 291                 break;
 292         case 0x2:
 293                 count = 256;
 294                 break;
 295         default:
 296                 return -EINVAL;
 297         }
 298
 299         /* Reserve one last filter which lets all pass */
 300         priv->tc_entries_max = count;
 301         priv->tc_entries = devm_kcalloc(priv->device,
 302                         count, sizeof(*priv->tc_entries), GFP_KERNEL);
 303         if (!priv->tc_entries)
 304                 return -ENOMEM;
 305
 306         tc_fill_all_pass_entry(&priv->tc_entries[count - 1]);
 307
 308         dev_info(priv->device, "Enabling HW TC (entries=%d, max_off=%d)\n",
 309                         priv->tc_entries_max, priv->tc_off_max);
 310
 311         return 0;
 312 }
 313
 314 static int tc_setup_cbs(struct stmmac_priv *priv,
 315                         struct tc_cbs_qopt_offload *qopt)
 316 {
 317         u32 tx_queues_count = priv->plat->tx_queues_to_use;
 318         u32 queue = qopt->queue;
 319         u32 ptr, speed_div;
 320         u32 mode_to_use;
 321         u64 value;
 322         int ret;
 323
 324         /* Queue 0 is not AVB capable */
 325         if (queue <= 0 || queue >= tx_queues_count)
 326                 return -EINVAL;
 327         if (!priv->dma_cap.av)
 328                 return -EOPNOTSUPP;
 329
 330         /* Port Transmit Rate and Speed Divider */
 331         switch (priv->speed) {
 332         case SPEED_10000:
 333                 ptr = 32;
 334                 speed_div = 10000000;
 335                 break;
 336         case SPEED_5000:
 337                 ptr = 32;
 338                 speed_div = 5000000;
 339                 break;
 340         case SPEED_2500:
 341                 ptr = 8;
 342                 speed_div = 2500000;
 343                 break;
 344         case SPEED_1000:
 345                 ptr = 8;
 346                 speed_div = 1000000;
 347                 break;
 348         case SPEED_100:
 349                 ptr = 4;
 350                 speed_div = 100000;
 351                 break;
 352         default:
 353                 return -EOPNOTSUPP;
 354         }
 355
 356         mode_to_use = priv->plat->tx_queues_cfg[queue].mode_to_use;
 357         if (mode_to_use == MTL_QUEUE_DCB && qopt->enable) {
 358                 ret = stmmac_dma_qmode(priv, priv->ioaddr, queue, MTL_QUEUE_AVB);
 359                 if (ret)
 360                         return ret;
 361
 362                 priv->plat->tx_queues_cfg[queue].mode_to_use = MTL_QUEUE_AVB;
 363         } else if (!qopt->enable) {
 364                 ret = stmmac_dma_qmode(priv, priv->ioaddr, queue,
 365                                        MTL_QUEUE_DCB);
 366                 if (ret)
 367                         return ret;
 368
 369                 priv->plat->tx_queues_cfg[queue].mode_to_use = MTL_QUEUE_DCB;
 370         }
 371
 372         /* Final adjustments for HW */
 373         value = div_s64(qopt->idleslope * 1024ll * ptr, speed_div);
 374         priv->plat->tx_queues_cfg[queue].idle_slope = value & GENMASK(31, 0);
 375
 376         value = div_s64(-qopt->sendslope * 1024ll * ptr, speed_div);
 377         priv->plat->tx_queues_cfg[queue].send_slope = value & GENMASK(31, 0);
 378
 379         value = qopt->hicredit * 1024ll * 8;
 380         priv->plat->tx_queues_cfg[queue].high_credit = value & GENMASK(31, 0);
 381
 382         value = qopt->locredit * 1024ll * 8;
 383         priv->plat->tx_queues_cfg[queue].low_credit = value & GENMASK(31, 0);
 384
 385         ret = stmmac_config_cbs(priv, priv->hw,
 386                                 priv->plat->tx_queues_cfg[queue].send_slope,
 387                                 priv->plat->tx_queues_cfg[queue].idle_slope,
 388                                 priv->plat->tx_queues_cfg[queue].high_credit,
 389                                 priv->plat->tx_queues_cfg[queue].low_credit,
 390                                 queue);
 391         if (ret)
 392                 return ret;
 393
 394         dev_info(priv->device, "CBS queue %d: send %d, idle %d, hi %d, lo %d\n",
 395                         queue, qopt->sendslope, qopt->idleslope,
 396                         qopt->hicredit, qopt->locredit);
 397         return 0;
 398 }
 399
 400 static int tc_parse_flow_actions(struct stmmac_priv *priv,
 401                                  struct flow_action *action,
 402                                  struct stmmac_flow_entry *entry,
 403                                  struct netlink_ext_ack *extack)
 404 {
 405         struct flow_action_entry *act;
 406         int i;
 407
 408         if (!flow_action_has_entries(action))
 409                 return -EINVAL;
 410
 411         if (!flow_action_basic_hw_stats_check(action, extack))
 412                 return -EOPNOTSUPP;
 413
 414         flow_action_for_each(i, act, action) {
 415                 switch (act->id) {
 416                 case FLOW_ACTION_DROP:
 417                         entry->action |= STMMAC_FLOW_ACTION_DROP;
 418                         return 0;
 419                 default:
 420                         break;
 421                 }
 422         }
 423
 424         /* Nothing to do, maybe inverse filter ? */
 425         return 0;
 426 }
 427
 428 static int tc_add_basic_flow(struct stmmac_priv *priv,
 429                              struct flow_cls_offload *cls,
 430                              struct stmmac_flow_entry *entry)
 431 {
 432         struct flow_rule *rule = flow_cls_offload_flow_rule(cls);
 433         struct flow_dissector *dissector = rule->match.dissector;
 434         struct flow_match_basic match;
 435
 436         /* Nothing to do here */
 437         if (!dissector_uses_key(dissector, FLOW_DISSECTOR_KEY_BASIC))
 438                 return -EINVAL;
 439
 440         flow_rule_match_basic(rule, &match);
 441         entry->ip_proto = match.key->ip_proto;
 442         return 0;
 443 }
 444
 445 static int tc_add_ip4_flow(struct stmmac_priv *priv,
 446                            struct flow_cls_offload *cls,
 447                            struct stmmac_flow_entry *entry)
 448 {
 449         struct flow_rule *rule = flow_cls_offload_flow_rule(cls);
 450         struct flow_dissector *dissector = rule->match.dissector;
 451         bool inv = entry->action & STMMAC_FLOW_ACTION_DROP;
 452         struct flow_match_ipv4_addrs match;
 453         u32 hw_match;
 454         int ret;
 455
 456         /* Nothing to do here */
 457         if (!dissector_uses_key(dissector, FLOW_DISSECTOR_KEY_IPV4_ADDRS))
 458                 return -EINVAL;
 459
 460         flow_rule_match_ipv4_addrs(rule, &match);
 461         hw_match = ntohl(match.key->src) & ntohl(match.mask->src);
 462         if (hw_match) {
 463                 ret = stmmac_config_l3_filter(priv, priv->hw, entry->idx, true,
 464                                               false, true, inv, hw_match);
 465                 if (ret)
 466                         return ret;
 467         }
 468
 469         hw_match = ntohl(match.key->dst) & ntohl(match.mask->dst);
 470         if (hw_match) {
 471                 ret = stmmac_config_l3_filter(priv, priv->hw, entry->idx, true,
 472                                               false, false, inv, hw_match);
 473                 if (ret)
 474                         return ret;
 475         }
 476
 477         return 0;
 478 }
 479
 480 static int tc_add_ports_flow(struct stmmac_priv *priv,
 481                              struct flow_cls_offload *cls,
 482                              struct stmmac_flow_entry *entry)
 483 {
 484         struct flow_rule *rule = flow_cls_offload_flow_rule(cls);
 485         struct flow_dissector *dissector = rule->match.dissector;
 486         bool inv = entry->action & STMMAC_FLOW_ACTION_DROP;
 487         struct flow_match_ports match;
 488         u32 hw_match;
 489         bool is_udp;
 490         int ret;
 491
 492         /* Nothing to do here */
 493         if (!dissector_uses_key(dissector, FLOW_DISSECTOR_KEY_PORTS))
 494                 return -EINVAL;
 495
 496         switch (entry->ip_proto) {
 497         case IPPROTO_TCP:
 498                 is_udp = false;
 499                 break;
 500         case IPPROTO_UDP:
 501                 is_udp = true;
 502                 break;
 503         default:
 504                 return -EINVAL;
 505         }
 506
 507         flow_rule_match_ports(rule, &match);
 508
 509         hw_match = ntohs(match.key->src) & ntohs(match.mask->src);
 510         if (hw_match) {
 511                 ret = stmmac_config_l4_filter(priv, priv->hw, entry->idx, true,
 512                                               is_udp, true, inv, hw_match);
 513                 if (ret)
 514                         return ret;
 515         }
 516
 517         hw_match = ntohs(match.key->dst) & ntohs(match.mask->dst);
 518         if (hw_match) {
 519                 ret = stmmac_config_l4_filter(priv, priv->hw, entry->idx, true,
 520                                               is_udp, false, inv, hw_match);
 521                 if (ret)
 522                         return ret;
 523         }
 524
 525         entry->is_l4 = true;
 526         return 0;
 527 }
 528
 529 static struct stmmac_flow_entry *tc_find_flow(struct stmmac_priv *priv,
 530                                               struct flow_cls_offload *cls,
 531                                               bool get_free)
 532 {
 533         int i;
 534
 535         for (i = 0; i < priv->flow_entries_max; i++) {
 536                 struct stmmac_flow_entry *entry = &priv->flow_entries[i];
 537
 538                 if (entry->cookie == cls->cookie)
 539                         return entry;
 540                 if (get_free && (entry->in_use == false))
 541                         return entry;
 542         }
 543
 544         return NULL;
 545 }
 546
 547 static struct {
 548         int (*fn)(struct stmmac_priv *priv, struct flow_cls_offload *cls,
 549                   struct stmmac_flow_entry *entry);
 550 } tc_flow_parsers[] = {
 551         { .fn = tc_add_basic_flow },
 552         { .fn = tc_add_ip4_flow },
 553         { .fn = tc_add_ports_flow },
 554 };
 555
 556 static int tc_add_flow(struct stmmac_priv *priv,
 557                        struct flow_cls_offload *cls)
 558 {
 559         struct stmmac_flow_entry *entry = tc_find_flow(priv, cls, false);
 560         struct flow_rule *rule = flow_cls_offload_flow_rule(cls);
 561         int i, ret;
 562
 563         if (!entry) {
 564                 entry = tc_find_flow(priv, cls, true);
 565                 if (!entry)
 566                         return -ENOENT;
 567         }
 568
 569         ret = tc_parse_flow_actions(priv, &rule->action, entry,
 570                                     cls->common.extack);
 571         if (ret)
 572                 return ret;
 573
 574         for (i = 0; i < ARRAY_SIZE(tc_flow_parsers); i++) {
 575                 ret = tc_flow_parsers[i].fn(priv, cls, entry);
 576                 if (!ret) {
 577                         entry->in_use = true;
 578                         continue;
 579                 }
 580         }
 581
 582         if (!entry->in_use)
 583                 return -EINVAL;
 584
 585         entry->cookie = cls->cookie;
 586         return 0;
 587 }
 588
 589 static int tc_del_flow(struct stmmac_priv *priv,
 590                        struct flow_cls_offload *cls)
 591 {
 592         struct stmmac_flow_entry *entry = tc_find_flow(priv, cls, false);
 593         int ret;
 594
 595         if (!entry || !entry->in_use)
 596                 return -ENOENT;
 597
 598         if (entry->is_l4) {
 599                 ret = stmmac_config_l4_filter(priv, priv->hw, entry->idx, false,
 600                                               false, false, false, 0);
 601         } else {
 602                 ret = stmmac_config_l3_filter(priv, priv->hw, entry->idx, false,
 603                                               false, false, false, 0);
 604         }
 605
 606         entry->in_use = false;
 607         entry->cookie = 0;
 608         entry->is_l4 = false;
 609         return ret;
 610 }
 611
 612 #define VLAN_PRIO_FULL_MASK (0x07)
 613
 614 static int tc_add_vlan_flow(struct stmmac_priv *priv,
 615                             struct flow_cls_offload *cls)
 616 {
 617         struct flow_rule *rule = flow_cls_offload_flow_rule(cls);
 618         struct flow_dissector *dissector = rule->match.dissector;
 619         int tc = tc_classid_to_hwtc(priv->dev, cls->classid);
 620         struct flow_match_vlan match;
 621
 622         /* Nothing to do here */
 623         if (!dissector_uses_key(dissector, FLOW_DISSECTOR_KEY_VLAN))
 624                 return -EINVAL;
 625
 626         if (tc < 0) {
 627                 netdev_err(priv->dev, "Invalid traffic class\n");
 628                 return -EINVAL;
 629         }
 630
 631         flow_rule_match_vlan(rule, &match);
 632
 633         if (match.mask->vlan_priority) {
 634                 u32 prio;
 635
 636                 if (match.mask->vlan_priority != VLAN_PRIO_FULL_MASK) {
 637                         netdev_err(priv->dev, "Only full mask is supported for VLAN priority");
 638                         return -EINVAL;
 639                 }
 640
 641                 prio = BIT(match.key->vlan_priority);
 642                 stmmac_rx_queue_prio(priv, priv->hw, prio, tc);
 643         }
 644
 645         return 0;
 646 }
 647
 648 static int tc_del_vlan_flow(struct stmmac_priv *priv,
 649                             struct flow_cls_offload *cls)
 650 {
 651         struct flow_rule *rule = flow_cls_offload_flow_rule(cls);
 652         struct flow_dissector *dissector = rule->match.dissector;
 653         int tc = tc_classid_to_hwtc(priv->dev, cls->classid);
 654
 655         /* Nothing to do here */
 656         if (!dissector_uses_key(dissector, FLOW_DISSECTOR_KEY_VLAN))
 657                 return -EINVAL;
 658
 659         if (tc < 0) {
 660                 netdev_err(priv->dev, "Invalid traffic class\n");
 661                 return -EINVAL;
 662         }
 663
 664         stmmac_rx_queue_prio(priv, priv->hw, 0, tc);
 665
 666         return 0;
 667 }
 668
 669 static int tc_add_flow_cls(struct stmmac_priv *priv,
 670                            struct flow_cls_offload *cls)
 671 {
 672         int ret;
 673
 674         ret = tc_add_flow(priv, cls);
 675         if (!ret)
 676                 return ret;
 677
 678         return tc_add_vlan_flow(priv, cls);
 679 }
 680
 681 static int tc_del_flow_cls(struct stmmac_priv *priv,
 682                            struct flow_cls_offload *cls)
 683 {
 684         int ret;
 685
 686         ret = tc_del_flow(priv, cls);
 687         if (!ret)
 688                 return ret;
 689
 690         return tc_del_vlan_flow(priv, cls);
 691 }
 692
 693 static int tc_setup_cls(struct stmmac_priv *priv,
 694                         struct flow_cls_offload *cls)
 695 {
 696         int ret = 0;
 697
 698         /* When RSS is enabled, the filtering will be bypassed */
 699         if (priv->rss.enable)
 700                 return -EBUSY;
 701
 702         switch (cls->command) {
 703         case FLOW_CLS_REPLACE:
 704                 ret = tc_add_flow_cls(priv, cls);
 705                 break;
 706         case FLOW_CLS_DESTROY:
 707                 ret = tc_del_flow_cls(priv, cls);
 708                 break;
 709         default:
 710                 return -EOPNOTSUPP;
 711         }
 712
 713         return ret;
 714 }
 715
 716 static int tc_setup_taprio(struct stmmac_priv *priv,
 717                            struct tc_taprio_qopt_offload *qopt)
 718 {
 719         u32 size, wid = priv->dma_cap.estwid, dep = priv->dma_cap.estdep;
 720         struct plat_stmmacenet_data *plat = priv->plat;
 721         struct timespec64 time, current_time;
 722         ktime_t current_time_ns;
 723         bool fpe = false;
 724         int i, ret = 0;
 725         u64 ctr;
 726
 727         if (!priv->dma_cap.estsel)
 728                 return -EOPNOTSUPP;
 729
 730         switch (wid) {
 731         case 0x1:
 732                 wid = 16;
 733                 break;
 734         case 0x2:
 735                 wid = 20;
 736                 break;
 737         case 0x3:
 738                 wid = 24;
 739                 break;
 740         default:
 741                 return -EOPNOTSUPP;
 742         }
 743
 744         switch (dep) {
 745         case 0x1:
 746                 dep = 64;
 747                 break;
 748         case 0x2:
 749                 dep = 128;
 750                 break;
 751         case 0x3:
 752                 dep = 256;
 753                 break;
 754         case 0x4:
 755                 dep = 512;
 756                 break;
 757         case 0x5:
 758                 dep = 1024;
 759                 break;
 760         default:
 761                 return -EOPNOTSUPP;
 762         }
 763
 764         if (!qopt->enable)
 765                 goto disable;
 766         if (qopt->num_entries >= dep)
 767                 return -EINVAL;
 768         if (!qopt->base_time)
 769                 return -ERANGE;
 770         if (!qopt->cycle_time)
 771                 return -ERANGE;
 772
 773         if (!plat->est) {
 774                 plat->est = devm_kzalloc(priv->device, sizeof(*plat->est),
 775                                          GFP_KERNEL);
 776                 if (!plat->est)
 777                         return -ENOMEM;
 778         } else {
 779                 memset(plat->est, 0, sizeof(*plat->est));
 780         }
 781
 782         size = qopt->num_entries;
 783
 784         priv->plat->est->gcl_size = size;
 785         priv->plat->est->enable = qopt->enable;
 786
 787         for (i = 0; i < size; i++) {
 788                 s64 delta_ns = qopt->entries[i].interval;
 789                 u32 gates = qopt->entries[i].gate_mask;
 790
 791                 if (delta_ns > GENMASK(wid, 0))
 792                         return -ERANGE;
 793                 if (gates > GENMASK(31 - wid, 0))
 794                         return -ERANGE;
 795
 796                 switch (qopt->entries[i].command) {
 797                 case TC_TAPRIO_CMD_SET_GATES:
 798                         if (fpe)
 799                                 return -EINVAL;
 800                         break;
 801                 case TC_TAPRIO_CMD_SET_AND_HOLD:
 802                         gates |= BIT(0);
 803                         fpe = true;
 804                         break;
 805                 case TC_TAPRIO_CMD_SET_AND_RELEASE:
 806                         gates &= ~BIT(0);
 807                         fpe = true;
 808                         break;
 809                 default:
 810                         return -EOPNOTSUPP;
 811                 }
 812
 813                 priv->plat->est->gcl[i] = delta_ns | (gates << wid);
 814         }
 815
 816         /* Adjust for real system time */
 817         priv->ptp_clock_ops.gettime64(&priv->ptp_clock_ops, &current_time);
 818         current_time_ns = timespec64_to_ktime(current_time);
 819         if (ktime_after(qopt->base_time, current_time_ns)) {
 820                 time = ktime_to_timespec64(qopt->base_time);
 821         } else {
 822                 ktime_t base_time;
 823                 s64 n;
 824
 825                 n = div64_s64(ktime_sub_ns(current_time_ns, qopt->base_time),
 826                               qopt->cycle_time);
 827                 base_time = ktime_add_ns(qopt->base_time,
 828                                          (n + 1) * qopt->cycle_time);
 829
 830                 time = ktime_to_timespec64(base_time);
 831         }
 832
 833         priv->plat->est->btr[0] = (u32)time.tv_nsec;
 834         priv->plat->est->btr[1] = (u32)time.tv_sec;
 835
 836         ctr = qopt->cycle_time;
 837         priv->plat->est->ctr[0] = do_div(ctr, NSEC_PER_SEC);
 838         priv->plat->est->ctr[1] = (u32)ctr;
 839
 840         if (fpe && !priv->dma_cap.fpesel)
 841                 return -EOPNOTSUPP;
 842
 843         /* Actual FPE register configuration will be done after FPE handshake
 844          * is success.
 845          */
 846         priv->plat->fpe_cfg->enable = fpe;
 847
 848         ret = stmmac_est_configure(priv, priv->ioaddr, priv->plat->est,
 849                                    priv->plat->clk_ptp_rate);
 850         if (ret) {
 851                 netdev_err(priv->dev, "failed to configure EST\n");
 852                 goto disable;
 853         }
 854
 855         netdev_info(priv->dev, "configured EST\n");
 856
 857         if (fpe) {
 858                 stmmac_fpe_handshake(priv, true);
 859                 netdev_info(priv->dev, "start FPE handshake\n");
 860         }
 861
 862         return 0;
 863
 864 disable:
 865         priv->plat->est->enable = false;
 866         stmmac_est_configure(priv, priv->ioaddr, priv->plat->est,
 867                              priv->plat->clk_ptp_rate);
 868
 869         priv->plat->fpe_cfg->enable = false;
 870         stmmac_fpe_configure(priv, priv->ioaddr,
 871                              priv->plat->tx_queues_to_use,
 872                              priv->plat->rx_queues_to_use,
 873                              false);
 874         netdev_info(priv->dev, "disabled FPE\n");
 875
 876         stmmac_fpe_handshake(priv, false);
 877         netdev_info(priv->dev, "stop FPE handshake\n");
 878
 879         return ret;
 880 }
 881
 882 static int tc_setup_etf(struct stmmac_priv *priv,
 883                         struct tc_etf_qopt_offload *qopt)
 884 {
 885         if (!priv->dma_cap.tbssel)
 886                 return -EOPNOTSUPP;
 887         if (qopt->queue >= priv->plat->tx_queues_to_use)
 888                 return -EINVAL;
 889         if (!(priv->tx_queue[qopt->queue].tbs & STMMAC_TBS_AVAIL))
 890                 return -EINVAL;
 891
 892         if (qopt->enable)
 893                 priv->tx_queue[qopt->queue].tbs |= STMMAC_TBS_EN;
 894         else
 895                 priv->tx_queue[qopt->queue].tbs &= ~STMMAC_TBS_EN;
 896
 897         netdev_info(priv->dev, "%s ETF for Queue %d\n",
 898                     qopt->enable ? "enabled" : "disabled", qopt->queue);
 899         return 0;
 900 }
 901
 902 const struct stmmac_tc_ops dwmac510_tc_ops = {
 903         .init = tc_init,
 904         .setup_cls_u32 = tc_setup_cls_u32,
 905         .setup_cbs = tc_setup_cbs,
 906         .setup_cls = tc_setup_cls,
 907         .setup_taprio = tc_setup_taprio,
 908         .setup_etf = tc_setup_etf,
 909 };