drivers/net/cxgbe/cxgbe_flow.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2018 Chelsio Communications.
   3  * All rights reserved.
   4  */
   5 #include "common.h"
   6 #include "cxgbe_flow.h"
   7
   8 #define __CXGBE_FILL_FS(__v, __m, fs, elem, e) \
   9 do { \
  10         if (!((fs)->val.elem || (fs)->mask.elem)) { \
  11                 (fs)->val.elem = (__v); \
  12                 (fs)->mask.elem = (__m); \
  13         } else { \
  14                 return rte_flow_error_set(e, EINVAL, RTE_FLOW_ERROR_TYPE_ITEM, \
  15                                           NULL, "a filter can be specified" \
  16                                           " only once"); \
  17         } \
  18 } while (0)
  19
  20 #define __CXGBE_FILL_FS_MEMCPY(__v, __m, fs, elem) \
  21 do { \
  22         memcpy(&(fs)->val.elem, &(__v), sizeof(__v)); \
  23         memcpy(&(fs)->mask.elem, &(__m), sizeof(__m)); \
  24 } while (0)
  25
  26 #define CXGBE_FILL_FS(v, m, elem) \
  27         __CXGBE_FILL_FS(v, m, fs, elem, e)
  28
  29 #define CXGBE_FILL_FS_MEMCPY(v, m, elem) \
  30         __CXGBE_FILL_FS_MEMCPY(v, m, fs, elem)
  31
  32 static int
  33 cxgbe_validate_item(const struct rte_flow_item *i, struct rte_flow_error *e)
  34 {
  35         /* rte_flow specification does not allow it. */
  36         if (!i->spec && (i->mask ||  i->last))
  37                 return rte_flow_error_set(e, EINVAL, RTE_FLOW_ERROR_TYPE_ITEM,
  38                                    i, "last or mask given without spec");
  39         /*
  40          * We don't support it.
  41          * Although, we can support values in last as 0's or last == spec.
  42          * But this will not provide user with any additional functionality
  43          * and will only increase the complexity for us.
  44          */
  45         if (i->last)
  46                 return rte_flow_error_set(e, ENOTSUP, RTE_FLOW_ERROR_TYPE_ITEM,
  47                                    i, "last is not supported by chelsio pmd");
  48         return 0;
  49 }
  50
  51 static void
  52 cxgbe_fill_filter_region(struct adapter *adap,
  53                          struct ch_filter_specification *fs)
  54 {
  55         struct tp_params *tp = &adap->params.tp;
  56         u64 hash_filter_mask = tp->hash_filter_mask;
  57         u64 ntuple_mask = 0;
  58
  59         fs->cap = 0;
  60
  61         if (!is_hashfilter(adap))
  62                 return;
  63
  64         if (fs->type) {
  65                 uint8_t biton[16] = {0xff, 0xff, 0xff, 0xff,
  66                                      0xff, 0xff, 0xff, 0xff,
  67                                      0xff, 0xff, 0xff, 0xff,
  68                                      0xff, 0xff, 0xff, 0xff};
  69                 uint8_t bitoff[16] = {0};
  70
  71                 if (!memcmp(fs->val.lip, bitoff, sizeof(bitoff)) ||
  72                     !memcmp(fs->val.fip, bitoff, sizeof(bitoff)) ||
  73                     memcmp(fs->mask.lip, biton, sizeof(biton)) ||
  74                     memcmp(fs->mask.fip, biton, sizeof(biton)))
  75                         return;
  76         } else {
  77                 uint32_t biton  = 0xffffffff;
  78                 uint32_t bitoff = 0x0U;
  79
  80                 if (!memcmp(fs->val.lip, &bitoff, sizeof(bitoff)) ||
  81                     !memcmp(fs->val.fip, &bitoff, sizeof(bitoff)) ||
  82                     memcmp(fs->mask.lip, &biton, sizeof(biton)) ||
  83                     memcmp(fs->mask.fip, &biton, sizeof(biton)))
  84                         return;
  85         }
  86
  87         if (!fs->val.lport || fs->mask.lport != 0xffff)
  88                 return;
  89         if (!fs->val.fport || fs->mask.fport != 0xffff)
  90                 return;
  91
  92         if (tp->protocol_shift >= 0)
  93                 ntuple_mask |= (u64)fs->mask.proto << tp->protocol_shift;
  94         if (tp->ethertype_shift >= 0)
  95                 ntuple_mask |= (u64)fs->mask.ethtype << tp->ethertype_shift;
  96         if (tp->port_shift >= 0)
  97                 ntuple_mask |= (u64)fs->mask.iport << tp->port_shift;
  98
  99         if (ntuple_mask != hash_filter_mask)
 100                 return;
 101
 102         fs->cap = 1;    /* use hash region */
 103 }
 104
 105 static int
 106 ch_rte_parsetype_port(const void *dmask, const struct rte_flow_item *item,
 107                       struct ch_filter_specification *fs,
 108                       struct rte_flow_error *e)
 109 {
 110         const struct rte_flow_item_phy_port *val = item->spec;
 111         const struct rte_flow_item_phy_port *umask = item->mask;
 112         const struct rte_flow_item_phy_port *mask;
 113
 114         mask = umask ? umask : (const struct rte_flow_item_phy_port *)dmask;
 115
 116         if (val->index > 0x7)
 117                 return rte_flow_error_set(e, EINVAL, RTE_FLOW_ERROR_TYPE_ITEM,
 118                                           item,
 119                                           "port index upto 0x7 is supported");
 120
 121         CXGBE_FILL_FS(val->index, mask->index, iport);
 122
 123         return 0;
 124 }
 125
 126 static int
 127 ch_rte_parsetype_udp(const void *dmask, const struct rte_flow_item *item,
 128                      struct ch_filter_specification *fs,
 129                      struct rte_flow_error *e)
 130 {
 131         const struct rte_flow_item_udp *val = item->spec;
 132         const struct rte_flow_item_udp *umask = item->mask;
 133         const struct rte_flow_item_udp *mask;
 134
 135         mask = umask ? umask : (const struct rte_flow_item_udp *)dmask;
 136
 137         if (mask->hdr.dgram_len || mask->hdr.dgram_cksum)
 138                 return rte_flow_error_set(e, ENOTSUP, RTE_FLOW_ERROR_TYPE_ITEM,
 139                                           item,
 140                                           "udp: only src/dst port supported");
 141
 142         CXGBE_FILL_FS(IPPROTO_UDP, 0xff, proto);
 143         if (!val)
 144                 return 0;
 145         CXGBE_FILL_FS(be16_to_cpu(val->hdr.src_port),
 146                       be16_to_cpu(mask->hdr.src_port), fport);
 147         CXGBE_FILL_FS(be16_to_cpu(val->hdr.dst_port),
 148                       be16_to_cpu(mask->hdr.dst_port), lport);
 149         return 0;
 150 }
 151
 152 static int
 153 ch_rte_parsetype_tcp(const void *dmask, const struct rte_flow_item *item,
 154                      struct ch_filter_specification *fs,
 155                      struct rte_flow_error *e)
 156 {
 157         const struct rte_flow_item_tcp *val = item->spec;
 158         const struct rte_flow_item_tcp *umask = item->mask;
 159         const struct rte_flow_item_tcp *mask;
 160
 161         mask = umask ? umask : (const struct rte_flow_item_tcp *)dmask;
 162
 163         if (mask->hdr.sent_seq || mask->hdr.recv_ack || mask->hdr.data_off ||
 164             mask->hdr.tcp_flags || mask->hdr.rx_win || mask->hdr.cksum ||
 165             mask->hdr.tcp_urp)
 166                 return rte_flow_error_set(e, ENOTSUP, RTE_FLOW_ERROR_TYPE_ITEM,
 167                                           item,
 168                                           "tcp: only src/dst port supported");
 169
 170         CXGBE_FILL_FS(IPPROTO_TCP, 0xff, proto);
 171         if (!val)
 172                 return 0;
 173         CXGBE_FILL_FS(be16_to_cpu(val->hdr.src_port),
 174                       be16_to_cpu(mask->hdr.src_port), fport);
 175         CXGBE_FILL_FS(be16_to_cpu(val->hdr.dst_port),
 176                       be16_to_cpu(mask->hdr.dst_port), lport);
 177         return 0;
 178 }
 179
 180 static int
 181 ch_rte_parsetype_ipv4(const void *dmask, const struct rte_flow_item *item,
 182                       struct ch_filter_specification *fs,
 183                       struct rte_flow_error *e)
 184 {
 185         const struct rte_flow_item_ipv4 *val = item->spec;
 186         const struct rte_flow_item_ipv4 *umask = item->mask;
 187         const struct rte_flow_item_ipv4 *mask;
 188
 189         mask = umask ? umask : (const struct rte_flow_item_ipv4 *)dmask;
 190
 191         if (mask->hdr.time_to_live || mask->hdr.type_of_service)
 192                 return rte_flow_error_set(e, ENOTSUP, RTE_FLOW_ERROR_TYPE_ITEM,
 193                                           item, "ttl/tos are not supported");
 194
 195         fs->type = FILTER_TYPE_IPV4;
 196         CXGBE_FILL_FS(ETHER_TYPE_IPv4, 0xffff, ethtype);
 197         if (!val)
 198                 return 0; /* ipv4 wild card */
 199
 200         CXGBE_FILL_FS(val->hdr.next_proto_id, mask->hdr.next_proto_id, proto);
 201         CXGBE_FILL_FS_MEMCPY(val->hdr.dst_addr, mask->hdr.dst_addr, lip);
 202         CXGBE_FILL_FS_MEMCPY(val->hdr.src_addr, mask->hdr.src_addr, fip);
 203
 204         return 0;
 205 }
 206
 207 static int
 208 ch_rte_parsetype_ipv6(const void *dmask, const struct rte_flow_item *item,
 209                       struct ch_filter_specification *fs,
 210                       struct rte_flow_error *e)
 211 {
 212         const struct rte_flow_item_ipv6 *val = item->spec;
 213         const struct rte_flow_item_ipv6 *umask = item->mask;
 214         const struct rte_flow_item_ipv6 *mask;
 215
 216         mask = umask ? umask : (const struct rte_flow_item_ipv6 *)dmask;
 217
 218         if (mask->hdr.vtc_flow ||
 219             mask->hdr.payload_len || mask->hdr.hop_limits)
 220                 return rte_flow_error_set(e, ENOTSUP, RTE_FLOW_ERROR_TYPE_ITEM,
 221                                           item,
 222                                           "tc/flow/hop are not supported");
 223
 224         fs->type = FILTER_TYPE_IPV6;
 225         CXGBE_FILL_FS(ETHER_TYPE_IPv6, 0xffff, ethtype);
 226         if (!val)
 227                 return 0; /* ipv6 wild card */
 228
 229         CXGBE_FILL_FS(val->hdr.proto, mask->hdr.proto, proto);
 230         CXGBE_FILL_FS_MEMCPY(val->hdr.dst_addr, mask->hdr.dst_addr, lip);
 231         CXGBE_FILL_FS_MEMCPY(val->hdr.src_addr, mask->hdr.src_addr, fip);
 232
 233         return 0;
 234 }
 235
 236 static int
 237 cxgbe_rtef_parse_attr(struct rte_flow *flow, const struct rte_flow_attr *attr,
 238                       struct rte_flow_error *e)
 239 {
 240         if (attr->egress)
 241                 return rte_flow_error_set(e, ENOTSUP, RTE_FLOW_ERROR_TYPE_ATTR,
 242                                           attr, "attribute:<egress> is"
 243                                           " not supported !");
 244         if (attr->group > 0)
 245                 return rte_flow_error_set(e, ENOTSUP, RTE_FLOW_ERROR_TYPE_ATTR,
 246                                           attr, "group parameter is"
 247                                           " not supported.");
 248
 249         flow->fidx = attr->priority ? attr->priority - 1 : FILTER_ID_MAX;
 250
 251         return 0;
 252 }
 253
 254 static inline int check_rxq(struct rte_eth_dev *dev, uint16_t rxq)
 255 {
 256         struct port_info *pi = ethdev2pinfo(dev);
 257
 258         if (rxq > pi->n_rx_qsets)
 259                 return -EINVAL;
 260         return 0;
 261 }
 262
 263 static int cxgbe_validate_fidxondel(struct filter_entry *f, unsigned int fidx)
 264 {
 265         struct adapter *adap = ethdev2adap(f->dev);
 266         struct ch_filter_specification fs = f->fs;
 267
 268         if (fidx >= adap->tids.nftids) {
 269                 dev_err(adap, "invalid flow index %d.\n", fidx);
 270                 return -EINVAL;
 271         }
 272         if (!is_filter_set(&adap->tids, fidx, fs.type)) {
 273                 dev_err(adap, "Already free fidx:%d f:%p\n", fidx, f);
 274                 return -EINVAL;
 275         }
 276
 277         return 0;
 278 }
 279
 280 static int
 281 cxgbe_validate_fidxonadd(struct ch_filter_specification *fs,
 282                          struct adapter *adap, unsigned int fidx)
 283 {
 284         if (is_filter_set(&adap->tids, fidx, fs->type)) {
 285                 dev_err(adap, "filter index: %d is busy.\n", fidx);
 286                 return -EBUSY;
 287         }
 288         if (fidx >= adap->tids.nftids) {
 289                 dev_err(adap, "filter index (%u) >= max(%u)\n",
 290                         fidx, adap->tids.nftids);
 291                 return -ERANGE;
 292         }
 293
 294         return 0;
 295 }
 296
 297 static int
 298 cxgbe_verify_fidx(struct rte_flow *flow, unsigned int fidx, uint8_t del)
 299 {
 300         if (flow->fs.cap)
 301                 return 0; /* Hash filters */
 302         return del ? cxgbe_validate_fidxondel(flow->f, fidx) :
 303                 cxgbe_validate_fidxonadd(&flow->fs,
 304                                          ethdev2adap(flow->dev), fidx);
 305 }
 306
 307 static int cxgbe_get_fidx(struct rte_flow *flow, unsigned int *fidx)
 308 {
 309         struct ch_filter_specification *fs = &flow->fs;
 310         struct adapter *adap = ethdev2adap(flow->dev);
 311
 312         /* For tcam get the next available slot, if default value specified */
 313         if (flow->fidx == FILTER_ID_MAX) {
 314                 int idx;
 315
 316                 idx = cxgbe_alloc_ftid(adap, fs->type);
 317                 if (idx < 0) {
 318                         dev_err(adap, "unable to get a filter index in tcam\n");
 319                         return -ENOMEM;
 320                 }
 321                 *fidx = (unsigned int)idx;
 322         } else {
 323                 *fidx = flow->fidx;
 324         }
 325
 326         return 0;
 327 }
 328
 329 static int
 330 ch_rte_parse_atype_switch(const struct rte_flow_action *a,
 331                           struct ch_filter_specification *fs,
 332                           struct rte_flow_error *e)
 333 {
 334         const struct rte_flow_action_phy_port *port;
 335
 336         switch (a->type) {
 337         case RTE_FLOW_ACTION_TYPE_PHY_PORT:
 338                 port = (const struct rte_flow_action_phy_port *)a->conf;
 339                 fs->eport = port->index;
 340                 break;
 341         default:
 342                 /* We are not supposed to come here */
 343                 return rte_flow_error_set(e, EINVAL,
 344                                           RTE_FLOW_ERROR_TYPE_ACTION, a,
 345                                           "Action not supported");
 346         }
 347
 348         return 0;
 349 }
 350
 351 static int
 352 cxgbe_rtef_parse_actions(struct rte_flow *flow,
 353                          const struct rte_flow_action action[],
 354                          struct rte_flow_error *e)
 355 {
 356         struct ch_filter_specification *fs = &flow->fs;
 357         const struct rte_flow_action_queue *q;
 358         const struct rte_flow_action *a;
 359         char abit = 0;
 360         int ret;
 361
 362         for (a = action; a->type != RTE_FLOW_ACTION_TYPE_END; a++) {
 363                 switch (a->type) {
 364                 case RTE_FLOW_ACTION_TYPE_VOID:
 365                         continue;
 366                 case RTE_FLOW_ACTION_TYPE_DROP:
 367                         if (abit++)
 368                                 return rte_flow_error_set(e, EINVAL,
 369                                                 RTE_FLOW_ERROR_TYPE_ACTION, a,
 370                                                 "specify only 1 pass/drop");
 371                         fs->action = FILTER_DROP;
 372                         break;
 373                 case RTE_FLOW_ACTION_TYPE_QUEUE:
 374                         q = (const struct rte_flow_action_queue *)a->conf;
 375                         if (!q)
 376                                 return rte_flow_error_set(e, EINVAL,
 377                                                 RTE_FLOW_ERROR_TYPE_ACTION, q,
 378                                                 "specify rx queue index");
 379                         if (check_rxq(flow->dev, q->index))
 380                                 return rte_flow_error_set(e, EINVAL,
 381                                                 RTE_FLOW_ERROR_TYPE_ACTION, q,
 382                                                 "Invalid rx queue");
 383                         if (abit++)
 384                                 return rte_flow_error_set(e, EINVAL,
 385                                                 RTE_FLOW_ERROR_TYPE_ACTION, a,
 386                                                 "specify only 1 pass/drop");
 387                         fs->action = FILTER_PASS;
 388                         fs->dirsteer = 1;
 389                         fs->iq = q->index;
 390                         break;
 391                 case RTE_FLOW_ACTION_TYPE_COUNT:
 392                         fs->hitcnts = 1;
 393                         break;
 394                 case RTE_FLOW_ACTION_TYPE_PHY_PORT:
 395                         /* We allow multiple switch actions, but switch is
 396                          * not compatible with either queue or drop
 397                          */
 398                         if (abit++ && fs->action != FILTER_SWITCH)
 399                                 return rte_flow_error_set(e, EINVAL,
 400                                                 RTE_FLOW_ERROR_TYPE_ACTION, a,
 401                                                 "overlapping action specified");
 402                         ret = ch_rte_parse_atype_switch(a, fs, e);
 403                         if (ret)
 404                                 return ret;
 405                         fs->action = FILTER_SWITCH;
 406                         break;
 407                 default:
 408                         /* Not supported action : return error */
 409                         return rte_flow_error_set(e, ENOTSUP,
 410                                                   RTE_FLOW_ERROR_TYPE_ACTION,
 411                                                   a, "Action not supported");
 412                 }
 413         }
 414
 415         return 0;
 416 }
 417
 418 struct chrte_fparse parseitem[] = {
 419                 [RTE_FLOW_ITEM_TYPE_PHY_PORT] = {
 420                 .fptr = ch_rte_parsetype_port,
 421                 .dmask = &(const struct rte_flow_item_phy_port){
 422                         .index = 0x7,
 423                 }
 424         },
 425
 426         [RTE_FLOW_ITEM_TYPE_IPV4] = {
 427                 .fptr  = ch_rte_parsetype_ipv4,
 428                 .dmask = &rte_flow_item_ipv4_mask,
 429         },
 430
 431         [RTE_FLOW_ITEM_TYPE_IPV6] = {
 432                 .fptr  = ch_rte_parsetype_ipv6,
 433                 .dmask = &rte_flow_item_ipv6_mask,
 434         },
 435
 436         [RTE_FLOW_ITEM_TYPE_UDP] = {
 437                 .fptr  = ch_rte_parsetype_udp,
 438                 .dmask = &rte_flow_item_udp_mask,
 439         },
 440
 441         [RTE_FLOW_ITEM_TYPE_TCP] = {
 442                 .fptr  = ch_rte_parsetype_tcp,
 443                 .dmask = &rte_flow_item_tcp_mask,
 444         },
 445 };
 446
 447 static int
 448 cxgbe_rtef_parse_items(struct rte_flow *flow,
 449                        const struct rte_flow_item items[],
 450                        struct rte_flow_error *e)
 451 {
 452         struct adapter *adap = ethdev2adap(flow->dev);
 453         const struct rte_flow_item *i;
 454         char repeat[ARRAY_SIZE(parseitem)] = {0};
 455
 456         for (i = items; i->type != RTE_FLOW_ITEM_TYPE_END; i++) {
 457                 struct chrte_fparse *idx;
 458                 int ret;
 459
 460                 if (i->type >= ARRAY_SIZE(parseitem))
 461                         return rte_flow_error_set(e, ENOTSUP,
 462                                                   RTE_FLOW_ERROR_TYPE_ITEM,
 463                                                   i, "Item not supported");
 464
 465                 switch (i->type) {
 466                 case RTE_FLOW_ITEM_TYPE_VOID:
 467                         continue;
 468                 default:
 469                         /* check if item is repeated */
 470                         if (repeat[i->type])
 471                                 return rte_flow_error_set(e, ENOTSUP,
 472                                                 RTE_FLOW_ERROR_TYPE_ITEM, i,
 473                                                 "parse items cannot be repeated (except void)");
 474                         repeat[i->type] = 1;
 475
 476                         /* validate the item */
 477                         ret = cxgbe_validate_item(i, e);
 478                         if (ret)
 479                                 return ret;
 480
 481                         idx = &flow->item_parser[i->type];
 482                         if (!idx || !idx->fptr) {
 483                                 return rte_flow_error_set(e, ENOTSUP,
 484                                                 RTE_FLOW_ERROR_TYPE_ITEM, i,
 485                                                 "Item not supported");
 486                         } else {
 487                                 ret = idx->fptr(idx->dmask, i, &flow->fs, e);
 488                                 if (ret)
 489                                         return ret;
 490                         }
 491                 }
 492         }
 493
 494         cxgbe_fill_filter_region(adap, &flow->fs);
 495
 496         return 0;
 497 }
 498
 499 static int
 500 cxgbe_flow_parse(struct rte_flow *flow,
 501                  const struct rte_flow_attr *attr,
 502                  const struct rte_flow_item item[],
 503                  const struct rte_flow_action action[],
 504                  struct rte_flow_error *e)
 505 {
 506         int ret;
 507
 508         /* parse user request into ch_filter_specification */
 509         ret = cxgbe_rtef_parse_attr(flow, attr, e);
 510         if (ret)
 511                 return ret;
 512         ret = cxgbe_rtef_parse_items(flow, item, e);
 513         if (ret)
 514                 return ret;
 515         return cxgbe_rtef_parse_actions(flow, action, e);
 516 }
 517
 518 static int __cxgbe_flow_create(struct rte_eth_dev *dev, struct rte_flow *flow)
 519 {
 520         struct ch_filter_specification *fs = &flow->fs;
 521         struct adapter *adap = ethdev2adap(dev);
 522         struct tid_info *t = &adap->tids;
 523         struct filter_ctx ctx;
 524         unsigned int fidx;
 525         int err;
 526
 527         if (cxgbe_get_fidx(flow, &fidx))
 528                 return -ENOMEM;
 529         if (cxgbe_verify_fidx(flow, fidx, 0))
 530                 return -1;
 531
 532         t4_init_completion(&ctx.completion);
 533         /* go create the filter */
 534         err = cxgbe_set_filter(dev, fidx, fs, &ctx);
 535         if (err) {
 536                 dev_err(adap, "Error %d while creating filter.\n", err);
 537                 return err;
 538         }
 539
 540         /* Poll the FW for reply */
 541         err = cxgbe_poll_for_completion(&adap->sge.fw_evtq,
 542                                         CXGBE_FLOW_POLL_US,
 543                                         CXGBE_FLOW_POLL_CNT,
 544                                         &ctx.completion);
 545         if (err) {
 546                 dev_err(adap, "Filter set operation timed out (%d)\n", err);
 547                 return err;
 548         }
 549         if (ctx.result) {
 550                 dev_err(adap, "Hardware error %d while creating the filter.\n",
 551                         ctx.result);
 552                 return ctx.result;
 553         }
 554
 555         if (fs->cap) { /* to destroy the filter */
 556                 flow->fidx = ctx.tid;
 557                 flow->f = lookup_tid(t, ctx.tid);
 558         } else {
 559                 flow->fidx = fidx;
 560                 flow->f = &adap->tids.ftid_tab[fidx];
 561         }
 562
 563         return 0;
 564 }
 565
 566 static struct rte_flow *
 567 cxgbe_flow_create(struct rte_eth_dev *dev,
 568                   const struct rte_flow_attr *attr,
 569                   const struct rte_flow_item item[],
 570                   const struct rte_flow_action action[],
 571                   struct rte_flow_error *e)
 572 {
 573         struct rte_flow *flow;
 574         int ret;
 575
 576         flow = t4_os_alloc(sizeof(struct rte_flow));
 577         if (!flow) {
 578                 rte_flow_error_set(e, ENOMEM, RTE_FLOW_ERROR_TYPE_HANDLE,
 579                                    NULL, "Unable to allocate memory for"
 580                                    " filter_entry");
 581                 return NULL;
 582         }
 583
 584         flow->item_parser = parseitem;
 585         flow->dev = dev;
 586
 587         if (cxgbe_flow_parse(flow, attr, item, action, e)) {
 588                 t4_os_free(flow);
 589                 return NULL;
 590         }
 591
 592         /* go, interact with cxgbe_filter */
 593         ret = __cxgbe_flow_create(dev, flow);
 594         if (ret) {
 595                 rte_flow_error_set(e, ret, RTE_FLOW_ERROR_TYPE_HANDLE,
 596                                    NULL, "Unable to create flow rule");
 597                 t4_os_free(flow);
 598                 return NULL;
 599         }
 600
 601         flow->f->private = flow; /* Will be used during flush */
 602
 603         return flow;
 604 }
 605
 606 static int __cxgbe_flow_destroy(struct rte_eth_dev *dev, struct rte_flow *flow)
 607 {
 608         struct adapter *adap = ethdev2adap(dev);
 609         struct filter_entry *f = flow->f;
 610         struct ch_filter_specification *fs;
 611         struct filter_ctx ctx;
 612         int err;
 613
 614         fs = &f->fs;
 615         if (cxgbe_verify_fidx(flow, flow->fidx, 1))
 616                 return -1;
 617
 618         t4_init_completion(&ctx.completion);
 619         err = cxgbe_del_filter(dev, flow->fidx, fs, &ctx);
 620         if (err) {
 621                 dev_err(adap, "Error %d while deleting filter.\n", err);
 622                 return err;
 623         }
 624
 625         /* Poll the FW for reply */
 626         err = cxgbe_poll_for_completion(&adap->sge.fw_evtq,
 627                                         CXGBE_FLOW_POLL_US,
 628                                         CXGBE_FLOW_POLL_CNT,
 629                                         &ctx.completion);
 630         if (err) {
 631                 dev_err(adap, "Filter delete operation timed out (%d)\n", err);
 632                 return err;
 633         }
 634         if (ctx.result) {
 635                 dev_err(adap, "Hardware error %d while deleting the filter.\n",
 636                         ctx.result);
 637                 return ctx.result;
 638         }
 639
 640         return 0;
 641 }
 642
 643 static int
 644 cxgbe_flow_destroy(struct rte_eth_dev *dev, struct rte_flow *flow,
 645                    struct rte_flow_error *e)
 646 {
 647         int ret;
 648
 649         ret = __cxgbe_flow_destroy(dev, flow);
 650         if (ret)
 651                 return rte_flow_error_set(e, ret, RTE_FLOW_ERROR_TYPE_HANDLE,
 652                                           flow, "error destroying filter.");
 653         t4_os_free(flow);
 654         return 0;
 655 }
 656
 657 static int __cxgbe_flow_query(struct rte_flow *flow, u64 *count,
 658                               u64 *byte_count)
 659 {
 660         struct adapter *adap = ethdev2adap(flow->dev);
 661         struct ch_filter_specification fs = flow->f->fs;
 662         unsigned int fidx = flow->fidx;
 663         int ret = 0;
 664
 665         ret = cxgbe_get_filter_count(adap, fidx, count, fs.cap, 0);
 666         if (ret)
 667                 return ret;
 668         return cxgbe_get_filter_count(adap, fidx, byte_count, fs.cap, 1);
 669 }
 670
 671 static int
 672 cxgbe_flow_query(struct rte_eth_dev *dev, struct rte_flow *flow,
 673                  const struct rte_flow_action *action, void *data,
 674                  struct rte_flow_error *e)
 675 {
 676         struct ch_filter_specification fs;
 677         struct rte_flow_query_count *c;
 678         struct filter_entry *f;
 679         int ret;
 680
 681         RTE_SET_USED(dev);
 682
 683         f = flow->f;
 684         fs = f->fs;
 685
 686         if (action->type != RTE_FLOW_ACTION_TYPE_COUNT)
 687                 return rte_flow_error_set(e, ENOTSUP,
 688                                           RTE_FLOW_ERROR_TYPE_ACTION, NULL,
 689                                           "only count supported for query");
 690
 691         /*
 692          * This is a valid operation, Since we are allowed to do chelsio
 693          * specific operations in rte side of our code but not vise-versa
 694          *
 695          * So, fs can be queried/modified here BUT rte_flow_query_count
 696          * cannot be worked on by the lower layer since we want to maintain
 697          * it as rte_flow agnostic.
 698          */
 699         if (!fs.hitcnts)
 700                 return rte_flow_error_set(e, EINVAL, RTE_FLOW_ERROR_TYPE_ACTION,
 701                                           &fs, "filter hit counters were not"
 702                                           " enabled during filter creation");
 703
 704         c = (struct rte_flow_query_count *)data;
 705         ret = __cxgbe_flow_query(flow, &c->hits, &c->bytes);
 706         if (ret)
 707                 return rte_flow_error_set(e, -ret, RTE_FLOW_ERROR_TYPE_ACTION,
 708                                           f, "cxgbe pmd failed to"
 709                                           " perform query");
 710
 711         /* Query was successful */
 712         c->bytes_set = 1;
 713         c->hits_set = 1;
 714
 715         return 0; /* success / partial_success */
 716 }
 717
 718 static int
 719 cxgbe_flow_validate(struct rte_eth_dev *dev,
 720                     const struct rte_flow_attr *attr,
 721                     const struct rte_flow_item item[],
 722                     const struct rte_flow_action action[],
 723                     struct rte_flow_error *e)
 724 {
 725         struct adapter *adap = ethdev2adap(dev);
 726         struct rte_flow *flow;
 727         unsigned int fidx;
 728         int ret;
 729
 730         flow = t4_os_alloc(sizeof(struct rte_flow));
 731         if (!flow)
 732                 return rte_flow_error_set(e, ENOMEM, RTE_FLOW_ERROR_TYPE_HANDLE,
 733                                 NULL,
 734                                 "Unable to allocate memory for filter_entry");
 735
 736         flow->item_parser = parseitem;
 737         flow->dev = dev;
 738
 739         ret = cxgbe_flow_parse(flow, attr, item, action, e);
 740         if (ret) {
 741                 t4_os_free(flow);
 742                 return ret;
 743         }
 744
 745         if (validate_filter(adap, &flow->fs)) {
 746                 t4_os_free(flow);
 747                 return rte_flow_error_set(e, EINVAL, RTE_FLOW_ERROR_TYPE_HANDLE,
 748                                 NULL,
 749                                 "validation failed. Check f/w config file.");
 750         }
 751
 752         if (cxgbe_get_fidx(flow, &fidx)) {
 753                 t4_os_free(flow);
 754                 return rte_flow_error_set(e, ENOMEM, RTE_FLOW_ERROR_TYPE_HANDLE,
 755                                           NULL, "no memory in tcam.");
 756         }
 757
 758         if (cxgbe_verify_fidx(flow, fidx, 0)) {
 759                 t4_os_free(flow);
 760                 return rte_flow_error_set(e, EINVAL, RTE_FLOW_ERROR_TYPE_HANDLE,
 761                                           NULL, "validation failed");
 762         }
 763
 764         t4_os_free(flow);
 765         return 0;
 766 }
 767
 768 /*
 769  * @ret : > 0 filter destroyed succsesfully
 770  *        < 0 error destroying filter
 771  *        == 1 filter not active / not found
 772  */
 773 static int
 774 cxgbe_check_n_destroy(struct filter_entry *f, struct rte_eth_dev *dev,
 775                       struct rte_flow_error *e)
 776 {
 777         if (f && (f->valid || f->pending) &&
 778             f->dev == dev && /* Only if user has asked for this port */
 779              f->private) /* We (rte_flow) created this filter */
 780                 return cxgbe_flow_destroy(dev, (struct rte_flow *)f->private,
 781                                           e);
 782         return 1;
 783 }
 784
 785 static int cxgbe_flow_flush(struct rte_eth_dev *dev, struct rte_flow_error *e)
 786 {
 787         struct adapter *adap = ethdev2adap(dev);
 788         unsigned int i;
 789         int ret = 0;
 790
 791         if (adap->tids.ftid_tab) {
 792                 struct filter_entry *f = &adap->tids.ftid_tab[0];
 793
 794                 for (i = 0; i < adap->tids.nftids; i++, f++) {
 795                         ret = cxgbe_check_n_destroy(f, dev, e);
 796                         if (ret < 0)
 797                                 goto out;
 798                 }
 799         }
 800
 801         if (is_hashfilter(adap) && adap->tids.tid_tab) {
 802                 struct filter_entry *f;
 803
 804                 for (i = adap->tids.hash_base; i <= adap->tids.ntids; i++) {
 805                         f = (struct filter_entry *)adap->tids.tid_tab[i];
 806
 807                         ret = cxgbe_check_n_destroy(f, dev, e);
 808                         if (ret < 0)
 809                                 goto out;
 810                 }
 811         }
 812
 813 out:
 814         return ret >= 0 ? 0 : ret;
 815 }
 816
 817 static const struct rte_flow_ops cxgbe_flow_ops = {
 818         .validate       = cxgbe_flow_validate,
 819         .create         = cxgbe_flow_create,
 820         .destroy        = cxgbe_flow_destroy,
 821         .flush          = cxgbe_flow_flush,
 822         .query          = cxgbe_flow_query,
 823         .isolate        = NULL,
 824 };
 825
 826 int
 827 cxgbe_dev_filter_ctrl(struct rte_eth_dev *dev,
 828                       enum rte_filter_type filter_type,
 829                       enum rte_filter_op filter_op,
 830                       void *arg)
 831 {
 832         int ret = 0;
 833
 834         RTE_SET_USED(dev);
 835         switch (filter_type) {
 836         case RTE_ETH_FILTER_GENERIC:
 837                 if (filter_op != RTE_ETH_FILTER_GET)
 838                         return -EINVAL;
 839                 *(const void **)arg = &cxgbe_flow_ops;
 840                 break;
 841         default:
 842                 ret = -ENOTSUP;
 843                 break;
 844         }
 845         return ret;
 846 }