drivers/net/sfc/sfc_flow.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  * Copyright (c) 2017 Solarflare Communications Inc.
   5  * All rights reserved.
   6  *
   7  * This software was jointly developed between OKTET Labs (under contract
   8  * for Solarflare) and Solarflare Communications, Inc.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions are met:
  12  *
  13  * 1. Redistributions of source code must retain the above copyright notice,
  14  *    this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright notice,
  16  *    this list of conditions and the following disclaimer in the documentation
  17  *    and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  20  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  21  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  23  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  24  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  25  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  26  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  27  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  28  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
  29  * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include <rte_tailq.h>
  33 #include <rte_common.h>
  34 #include <rte_ethdev.h>
  35 #include <rte_eth_ctrl.h>
  36 #include <rte_ether.h>
  37 #include <rte_flow.h>
  38 #include <rte_flow_driver.h>
  39
  40 #include "efx.h"
  41
  42 #include "sfc.h"
  43 #include "sfc_rx.h"
  44 #include "sfc_filter.h"
  45 #include "sfc_flow.h"
  46 #include "sfc_log.h"
  47
  48 /*
  49  * At now flow API is implemented in such a manner that each
  50  * flow rule is converted to a hardware filter.
  51  * All elements of flow rule (attributes, pattern items, actions)
  52  * correspond to one or more fields in the efx_filter_spec_s structure
  53  * that is responsible for the hardware filter.
  54  */
  55
  56 enum sfc_flow_item_layers {
  57         SFC_FLOW_ITEM_ANY_LAYER,
  58         SFC_FLOW_ITEM_START_LAYER,
  59         SFC_FLOW_ITEM_L2,
  60         SFC_FLOW_ITEM_L3,
  61         SFC_FLOW_ITEM_L4,
  62 };
  63
  64 typedef int (sfc_flow_item_parse)(const struct rte_flow_item *item,
  65                                   efx_filter_spec_t *spec,
  66                                   struct rte_flow_error *error);
  67
  68 struct sfc_flow_item {
  69         enum rte_flow_item_type type;           /* Type of item */
  70         enum sfc_flow_item_layers layer;        /* Layer of item */
  71         enum sfc_flow_item_layers prev_layer;   /* Previous layer of item */
  72         sfc_flow_item_parse *parse;             /* Parsing function */
  73 };
  74
  75 static sfc_flow_item_parse sfc_flow_parse_void;
  76 static sfc_flow_item_parse sfc_flow_parse_eth;
  77 static sfc_flow_item_parse sfc_flow_parse_vlan;
  78 static sfc_flow_item_parse sfc_flow_parse_ipv4;
  79 static sfc_flow_item_parse sfc_flow_parse_ipv6;
  80 static sfc_flow_item_parse sfc_flow_parse_tcp;
  81 static sfc_flow_item_parse sfc_flow_parse_udp;
  82
  83 static boolean_t
  84 sfc_flow_is_zero(const uint8_t *buf, unsigned int size)
  85 {
  86         uint8_t sum = 0;
  87         unsigned int i;
  88
  89         for (i = 0; i < size; i++)
  90                 sum |= buf[i];
  91
  92         return (sum == 0) ? B_TRUE : B_FALSE;
  93 }
  94
  95 /*
  96  * Validate item and prepare structures spec and mask for parsing
  97  */
  98 static int
  99 sfc_flow_parse_init(const struct rte_flow_item *item,
 100                     const void **spec_ptr,
 101                     const void **mask_ptr,
 102                     const void *supp_mask,
 103                     const void *def_mask,
 104                     unsigned int size,
 105                     struct rte_flow_error *error)
 106 {
 107         const uint8_t *spec;
 108         const uint8_t *mask;
 109         const uint8_t *last;
 110         uint8_t supp;
 111         unsigned int i;
 112
 113         if (item == NULL) {
 114                 rte_flow_error_set(error, EINVAL,
 115                                    RTE_FLOW_ERROR_TYPE_ITEM, NULL,
 116                                    "NULL item");
 117                 return -rte_errno;
 118         }
 119
 120         if ((item->last != NULL || item->mask != NULL) && item->spec == NULL) {
 121                 rte_flow_error_set(error, EINVAL,
 122                                    RTE_FLOW_ERROR_TYPE_ITEM, item,
 123                                    "Mask or last is set without spec");
 124                 return -rte_errno;
 125         }
 126
 127         /*
 128          * If "mask" is not set, default mask is used,
 129          * but if default mask is NULL, "mask" should be set
 130          */
 131         if (item->mask == NULL) {
 132                 if (def_mask == NULL) {
 133                         rte_flow_error_set(error, EINVAL,
 134                                 RTE_FLOW_ERROR_TYPE_ITEM, NULL,
 135                                 "Mask should be specified");
 136                         return -rte_errno;
 137                 }
 138
 139                 mask = (const uint8_t *)def_mask;
 140         } else {
 141                 mask = (const uint8_t *)item->mask;
 142         }
 143
 144         spec = (const uint8_t *)item->spec;
 145         last = (const uint8_t *)item->last;
 146
 147         if (spec == NULL)
 148                 goto exit;
 149
 150         /*
 151          * If field values in "last" are either 0 or equal to the corresponding
 152          * values in "spec" then they are ignored
 153          */
 154         if (last != NULL &&
 155             !sfc_flow_is_zero(last, size) &&
 156             memcmp(last, spec, size) != 0) {
 157                 rte_flow_error_set(error, ENOTSUP,
 158                                    RTE_FLOW_ERROR_TYPE_ITEM, item,
 159                                    "Ranging is not supported");
 160                 return -rte_errno;
 161         }
 162
 163         if (supp_mask == NULL) {
 164                 rte_flow_error_set(error, EINVAL,
 165                         RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
 166                         "Supported mask for item should be specified");
 167                 return -rte_errno;
 168         }
 169
 170         /* Check that mask does not ask for more match than supp_mask */
 171         for (i = 0; i < size; i++) {
 172                 supp = ((const uint8_t *)supp_mask)[i];
 173
 174                 if (~supp & mask[i]) {
 175                         rte_flow_error_set(error, ENOTSUP,
 176                                            RTE_FLOW_ERROR_TYPE_ITEM, item,
 177                                            "Item's field is not supported");
 178                         return -rte_errno;
 179                 }
 180         }
 181
 182 exit:
 183         *spec_ptr = spec;
 184         *mask_ptr = mask;
 185         return 0;
 186 }
 187
 188 /*
 189  * Protocol parsers.
 190  * Masking is not supported, so masks in items should be either
 191  * full or empty (zeroed) and set only for supported fields which
 192  * are specified in the supp_mask.
 193  */
 194
 195 static int
 196 sfc_flow_parse_void(__rte_unused const struct rte_flow_item *item,
 197                     __rte_unused efx_filter_spec_t *efx_spec,
 198                     __rte_unused struct rte_flow_error *error)
 199 {
 200         return 0;
 201 }
 202
 203 /**
 204  * Convert Ethernet item to EFX filter specification.
 205  *
 206  * @param item[in]
 207  *   Item specification. Only source and destination addresses and
 208  *   Ethernet type fields are supported. In addition to full and
 209  *   empty masks of destination address, individual/group mask is
 210  *   also supported. If the mask is NULL, default mask will be used.
 211  *   Ranging is not supported.
 212  * @param efx_spec[in, out]
 213  *   EFX filter specification to update.
 214  * @param[out] error
 215  *   Perform verbose error reporting if not NULL.
 216  */
 217 static int
 218 sfc_flow_parse_eth(const struct rte_flow_item *item,
 219                    efx_filter_spec_t *efx_spec,
 220                    struct rte_flow_error *error)
 221 {
 222         int rc;
 223         const struct rte_flow_item_eth *spec = NULL;
 224         const struct rte_flow_item_eth *mask = NULL;
 225         const struct rte_flow_item_eth supp_mask = {
 226                 .dst.addr_bytes = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff },
 227                 .src.addr_bytes = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff },
 228                 .type = 0xffff,
 229         };
 230         const uint8_t ig_mask[EFX_MAC_ADDR_LEN] = {
 231                 0x01, 0x00, 0x00, 0x00, 0x00, 0x00
 232         };
 233
 234         rc = sfc_flow_parse_init(item,
 235                                  (const void **)&spec,
 236                                  (const void **)&mask,
 237                                  &supp_mask,
 238                                  &rte_flow_item_eth_mask,
 239                                  sizeof(struct rte_flow_item_eth),
 240                                  error);
 241         if (rc != 0)
 242                 return rc;
 243
 244         /* If "spec" is not set, could be any Ethernet */
 245         if (spec == NULL)
 246                 return 0;
 247
 248         if (is_same_ether_addr(&mask->dst, &supp_mask.dst)) {
 249                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_LOC_MAC;
 250                 rte_memcpy(efx_spec->efs_loc_mac, spec->dst.addr_bytes,
 251                            EFX_MAC_ADDR_LEN);
 252         } else if (memcmp(mask->dst.addr_bytes, ig_mask,
 253                           EFX_MAC_ADDR_LEN) == 0) {
 254                 if (is_unicast_ether_addr(&spec->dst))
 255                         efx_spec->efs_match_flags |=
 256                                 EFX_FILTER_MATCH_UNKNOWN_UCAST_DST;
 257                 else
 258                         efx_spec->efs_match_flags |=
 259                                 EFX_FILTER_MATCH_UNKNOWN_MCAST_DST;
 260         } else if (!is_zero_ether_addr(&mask->dst)) {
 261                 goto fail_bad_mask;
 262         }
 263
 264         if (is_same_ether_addr(&mask->src, &supp_mask.src)) {
 265                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_REM_MAC;
 266                 rte_memcpy(efx_spec->efs_rem_mac, spec->src.addr_bytes,
 267                            EFX_MAC_ADDR_LEN);
 268         } else if (!is_zero_ether_addr(&mask->src)) {
 269                 goto fail_bad_mask;
 270         }
 271
 272         /*
 273          * Ether type is in big-endian byte order in item and
 274          * in little-endian in efx_spec, so byte swap is used
 275          */
 276         if (mask->type == supp_mask.type) {
 277                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_ETHER_TYPE;
 278                 efx_spec->efs_ether_type = rte_bswap16(spec->type);
 279         } else if (mask->type != 0) {
 280                 goto fail_bad_mask;
 281         }
 282
 283         return 0;
 284
 285 fail_bad_mask:
 286         rte_flow_error_set(error, EINVAL,
 287                            RTE_FLOW_ERROR_TYPE_ITEM, item,
 288                            "Bad mask in the ETH pattern item");
 289         return -rte_errno;
 290 }
 291
 292 /**
 293  * Convert VLAN item to EFX filter specification.
 294  *
 295  * @param item[in]
 296  *   Item specification. Only VID field is supported.
 297  *   The mask can not be NULL. Ranging is not supported.
 298  * @param efx_spec[in, out]
 299  *   EFX filter specification to update.
 300  * @param[out] error
 301  *   Perform verbose error reporting if not NULL.
 302  */
 303 static int
 304 sfc_flow_parse_vlan(const struct rte_flow_item *item,
 305                     efx_filter_spec_t *efx_spec,
 306                     struct rte_flow_error *error)
 307 {
 308         int rc;
 309         uint16_t vid;
 310         const struct rte_flow_item_vlan *spec = NULL;
 311         const struct rte_flow_item_vlan *mask = NULL;
 312         const struct rte_flow_item_vlan supp_mask = {
 313                 .tci = rte_cpu_to_be_16(ETH_VLAN_ID_MAX),
 314         };
 315
 316         rc = sfc_flow_parse_init(item,
 317                                  (const void **)&spec,
 318                                  (const void **)&mask,
 319                                  &supp_mask,
 320                                  NULL,
 321                                  sizeof(struct rte_flow_item_vlan),
 322                                  error);
 323         if (rc != 0)
 324                 return rc;
 325
 326         /*
 327          * VID is in big-endian byte order in item and
 328          * in little-endian in efx_spec, so byte swap is used.
 329          * If two VLAN items are included, the first matches
 330          * the outer tag and the next matches the inner tag.
 331          */
 332         if (mask->tci == supp_mask.tci) {
 333                 vid = rte_bswap16(spec->tci);
 334
 335                 if (!(efx_spec->efs_match_flags &
 336                       EFX_FILTER_MATCH_OUTER_VID)) {
 337                         efx_spec->efs_match_flags |= EFX_FILTER_MATCH_OUTER_VID;
 338                         efx_spec->efs_outer_vid = vid;
 339                 } else if (!(efx_spec->efs_match_flags &
 340                              EFX_FILTER_MATCH_INNER_VID)) {
 341                         efx_spec->efs_match_flags |= EFX_FILTER_MATCH_INNER_VID;
 342                         efx_spec->efs_inner_vid = vid;
 343                 } else {
 344                         rte_flow_error_set(error, EINVAL,
 345                                            RTE_FLOW_ERROR_TYPE_ITEM, item,
 346                                            "More than two VLAN items");
 347                         return -rte_errno;
 348                 }
 349         } else {
 350                 rte_flow_error_set(error, EINVAL,
 351                                    RTE_FLOW_ERROR_TYPE_ITEM, item,
 352                                    "VLAN ID in TCI match is required");
 353                 return -rte_errno;
 354         }
 355
 356         return 0;
 357 }
 358
 359 /**
 360  * Convert IPv4 item to EFX filter specification.
 361  *
 362  * @param item[in]
 363  *   Item specification. Only source and destination addresses and
 364  *   protocol fields are supported. If the mask is NULL, default
 365  *   mask will be used. Ranging is not supported.
 366  * @param efx_spec[in, out]
 367  *   EFX filter specification to update.
 368  * @param[out] error
 369  *   Perform verbose error reporting if not NULL.
 370  */
 371 static int
 372 sfc_flow_parse_ipv4(const struct rte_flow_item *item,
 373                     efx_filter_spec_t *efx_spec,
 374                     struct rte_flow_error *error)
 375 {
 376         int rc;
 377         const struct rte_flow_item_ipv4 *spec = NULL;
 378         const struct rte_flow_item_ipv4 *mask = NULL;
 379         const uint16_t ether_type_ipv4 = rte_cpu_to_le_16(EFX_ETHER_TYPE_IPV4);
 380         const struct rte_flow_item_ipv4 supp_mask = {
 381                 .hdr = {
 382                         .src_addr = 0xffffffff,
 383                         .dst_addr = 0xffffffff,
 384                         .next_proto_id = 0xff,
 385                 }
 386         };
 387
 388         rc = sfc_flow_parse_init(item,
 389                                  (const void **)&spec,
 390                                  (const void **)&mask,
 391                                  &supp_mask,
 392                                  &rte_flow_item_ipv4_mask,
 393                                  sizeof(struct rte_flow_item_ipv4),
 394                                  error);
 395         if (rc != 0)
 396                 return rc;
 397
 398         /*
 399          * Filtering by IPv4 source and destination addresses requires
 400          * the appropriate ETHER_TYPE in hardware filters
 401          */
 402         if (!(efx_spec->efs_match_flags & EFX_FILTER_MATCH_ETHER_TYPE)) {
 403                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_ETHER_TYPE;
 404                 efx_spec->efs_ether_type = ether_type_ipv4;
 405         } else if (efx_spec->efs_ether_type != ether_type_ipv4) {
 406                 rte_flow_error_set(error, EINVAL,
 407                         RTE_FLOW_ERROR_TYPE_ITEM, item,
 408                         "Ethertype in pattern with IPV4 item should be appropriate");
 409                 return -rte_errno;
 410         }
 411
 412         if (spec == NULL)
 413                 return 0;
 414
 415         /*
 416          * IPv4 addresses are in big-endian byte order in item and in
 417          * efx_spec
 418          */
 419         if (mask->hdr.src_addr == supp_mask.hdr.src_addr) {
 420                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_REM_HOST;
 421                 efx_spec->efs_rem_host.eo_u32[0] = spec->hdr.src_addr;
 422         } else if (mask->hdr.src_addr != 0) {
 423                 goto fail_bad_mask;
 424         }
 425
 426         if (mask->hdr.dst_addr == supp_mask.hdr.dst_addr) {
 427                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_LOC_HOST;
 428                 efx_spec->efs_loc_host.eo_u32[0] = spec->hdr.dst_addr;
 429         } else if (mask->hdr.dst_addr != 0) {
 430                 goto fail_bad_mask;
 431         }
 432
 433         if (mask->hdr.next_proto_id == supp_mask.hdr.next_proto_id) {
 434                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_IP_PROTO;
 435                 efx_spec->efs_ip_proto = spec->hdr.next_proto_id;
 436         } else if (mask->hdr.next_proto_id != 0) {
 437                 goto fail_bad_mask;
 438         }
 439
 440         return 0;
 441
 442 fail_bad_mask:
 443         rte_flow_error_set(error, EINVAL,
 444                            RTE_FLOW_ERROR_TYPE_ITEM, item,
 445                            "Bad mask in the IPV4 pattern item");
 446         return -rte_errno;
 447 }
 448
 449 /**
 450  * Convert IPv6 item to EFX filter specification.
 451  *
 452  * @param item[in]
 453  *   Item specification. Only source and destination addresses and
 454  *   next header fields are supported. If the mask is NULL, default
 455  *   mask will be used. Ranging is not supported.
 456  * @param efx_spec[in, out]
 457  *   EFX filter specification to update.
 458  * @param[out] error
 459  *   Perform verbose error reporting if not NULL.
 460  */
 461 static int
 462 sfc_flow_parse_ipv6(const struct rte_flow_item *item,
 463                     efx_filter_spec_t *efx_spec,
 464                     struct rte_flow_error *error)
 465 {
 466         int rc;
 467         const struct rte_flow_item_ipv6 *spec = NULL;
 468         const struct rte_flow_item_ipv6 *mask = NULL;
 469         const uint16_t ether_type_ipv6 = rte_cpu_to_le_16(EFX_ETHER_TYPE_IPV6);
 470         const struct rte_flow_item_ipv6 supp_mask = {
 471                 .hdr = {
 472                         .src_addr = { 0xff, 0xff, 0xff, 0xff,
 473                                       0xff, 0xff, 0xff, 0xff,
 474                                       0xff, 0xff, 0xff, 0xff,
 475                                       0xff, 0xff, 0xff, 0xff },
 476                         .dst_addr = { 0xff, 0xff, 0xff, 0xff,
 477                                       0xff, 0xff, 0xff, 0xff,
 478                                       0xff, 0xff, 0xff, 0xff,
 479                                       0xff, 0xff, 0xff, 0xff },
 480                         .proto = 0xff,
 481                 }
 482         };
 483
 484         rc = sfc_flow_parse_init(item,
 485                                  (const void **)&spec,
 486                                  (const void **)&mask,
 487                                  &supp_mask,
 488                                  &rte_flow_item_ipv6_mask,
 489                                  sizeof(struct rte_flow_item_ipv6),
 490                                  error);
 491         if (rc != 0)
 492                 return rc;
 493
 494         /*
 495          * Filtering by IPv6 source and destination addresses requires
 496          * the appropriate ETHER_TYPE in hardware filters
 497          */
 498         if (!(efx_spec->efs_match_flags & EFX_FILTER_MATCH_ETHER_TYPE)) {
 499                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_ETHER_TYPE;
 500                 efx_spec->efs_ether_type = ether_type_ipv6;
 501         } else if (efx_spec->efs_ether_type != ether_type_ipv6) {
 502                 rte_flow_error_set(error, EINVAL,
 503                         RTE_FLOW_ERROR_TYPE_ITEM, item,
 504                         "Ethertype in pattern with IPV6 item should be appropriate");
 505                 return -rte_errno;
 506         }
 507
 508         if (spec == NULL)
 509                 return 0;
 510
 511         /*
 512          * IPv6 addresses are in big-endian byte order in item and in
 513          * efx_spec
 514          */
 515         if (memcmp(mask->hdr.src_addr, supp_mask.hdr.src_addr,
 516                    sizeof(mask->hdr.src_addr)) == 0) {
 517                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_REM_HOST;
 518
 519                 RTE_BUILD_BUG_ON(sizeof(efx_spec->efs_rem_host) !=
 520                                  sizeof(spec->hdr.src_addr));
 521                 rte_memcpy(&efx_spec->efs_rem_host, spec->hdr.src_addr,
 522                            sizeof(efx_spec->efs_rem_host));
 523         } else if (!sfc_flow_is_zero(mask->hdr.src_addr,
 524                                      sizeof(mask->hdr.src_addr))) {
 525                 goto fail_bad_mask;
 526         }
 527
 528         if (memcmp(mask->hdr.dst_addr, supp_mask.hdr.dst_addr,
 529                    sizeof(mask->hdr.dst_addr)) == 0) {
 530                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_LOC_HOST;
 531
 532                 RTE_BUILD_BUG_ON(sizeof(efx_spec->efs_loc_host) !=
 533                                  sizeof(spec->hdr.dst_addr));
 534                 rte_memcpy(&efx_spec->efs_loc_host, spec->hdr.dst_addr,
 535                            sizeof(efx_spec->efs_loc_host));
 536         } else if (!sfc_flow_is_zero(mask->hdr.dst_addr,
 537                                      sizeof(mask->hdr.dst_addr))) {
 538                 goto fail_bad_mask;
 539         }
 540
 541         if (mask->hdr.proto == supp_mask.hdr.proto) {
 542                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_IP_PROTO;
 543                 efx_spec->efs_ip_proto = spec->hdr.proto;
 544         } else if (mask->hdr.proto != 0) {
 545                 goto fail_bad_mask;
 546         }
 547
 548         return 0;
 549
 550 fail_bad_mask:
 551         rte_flow_error_set(error, EINVAL,
 552                            RTE_FLOW_ERROR_TYPE_ITEM, item,
 553                            "Bad mask in the IPV6 pattern item");
 554         return -rte_errno;
 555 }
 556
 557 /**
 558  * Convert TCP item to EFX filter specification.
 559  *
 560  * @param item[in]
 561  *   Item specification. Only source and destination ports fields
 562  *   are supported. If the mask is NULL, default mask will be used.
 563  *   Ranging is not supported.
 564  * @param efx_spec[in, out]
 565  *   EFX filter specification to update.
 566  * @param[out] error
 567  *   Perform verbose error reporting if not NULL.
 568  */
 569 static int
 570 sfc_flow_parse_tcp(const struct rte_flow_item *item,
 571                    efx_filter_spec_t *efx_spec,
 572                    struct rte_flow_error *error)
 573 {
 574         int rc;
 575         const struct rte_flow_item_tcp *spec = NULL;
 576         const struct rte_flow_item_tcp *mask = NULL;
 577         const struct rte_flow_item_tcp supp_mask = {
 578                 .hdr = {
 579                         .src_port = 0xffff,
 580                         .dst_port = 0xffff,
 581                 }
 582         };
 583
 584         rc = sfc_flow_parse_init(item,
 585                                  (const void **)&spec,
 586                                  (const void **)&mask,
 587                                  &supp_mask,
 588                                  &rte_flow_item_tcp_mask,
 589                                  sizeof(struct rte_flow_item_tcp),
 590                                  error);
 591         if (rc != 0)
 592                 return rc;
 593
 594         /*
 595          * Filtering by TCP source and destination ports requires
 596          * the appropriate IP_PROTO in hardware filters
 597          */
 598         if (!(efx_spec->efs_match_flags & EFX_FILTER_MATCH_IP_PROTO)) {
 599                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_IP_PROTO;
 600                 efx_spec->efs_ip_proto = EFX_IPPROTO_TCP;
 601         } else if (efx_spec->efs_ip_proto != EFX_IPPROTO_TCP) {
 602                 rte_flow_error_set(error, EINVAL,
 603                         RTE_FLOW_ERROR_TYPE_ITEM, item,
 604                         "IP proto in pattern with TCP item should be appropriate");
 605                 return -rte_errno;
 606         }
 607
 608         if (spec == NULL)
 609                 return 0;
 610
 611         /*
 612          * Source and destination ports are in big-endian byte order in item and
 613          * in little-endian in efx_spec, so byte swap is used
 614          */
 615         if (mask->hdr.src_port == supp_mask.hdr.src_port) {
 616                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_REM_PORT;
 617                 efx_spec->efs_rem_port = rte_bswap16(spec->hdr.src_port);
 618         } else if (mask->hdr.src_port != 0) {
 619                 goto fail_bad_mask;
 620         }
 621
 622         if (mask->hdr.dst_port == supp_mask.hdr.dst_port) {
 623                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_LOC_PORT;
 624                 efx_spec->efs_loc_port = rte_bswap16(spec->hdr.dst_port);
 625         } else if (mask->hdr.dst_port != 0) {
 626                 goto fail_bad_mask;
 627         }
 628
 629         return 0;
 630
 631 fail_bad_mask:
 632         rte_flow_error_set(error, EINVAL,
 633                            RTE_FLOW_ERROR_TYPE_ITEM, item,
 634                            "Bad mask in the TCP pattern item");
 635         return -rte_errno;
 636 }
 637
 638 /**
 639  * Convert UDP item to EFX filter specification.
 640  *
 641  * @param item[in]
 642  *   Item specification. Only source and destination ports fields
 643  *   are supported. If the mask is NULL, default mask will be used.
 644  *   Ranging is not supported.
 645  * @param efx_spec[in, out]
 646  *   EFX filter specification to update.
 647  * @param[out] error
 648  *   Perform verbose error reporting if not NULL.
 649  */
 650 static int
 651 sfc_flow_parse_udp(const struct rte_flow_item *item,
 652                    efx_filter_spec_t *efx_spec,
 653                    struct rte_flow_error *error)
 654 {
 655         int rc;
 656         const struct rte_flow_item_udp *spec = NULL;
 657         const struct rte_flow_item_udp *mask = NULL;
 658         const struct rte_flow_item_udp supp_mask = {
 659                 .hdr = {
 660                         .src_port = 0xffff,
 661                         .dst_port = 0xffff,
 662                 }
 663         };
 664
 665         rc = sfc_flow_parse_init(item,
 666                                  (const void **)&spec,
 667                                  (const void **)&mask,
 668                                  &supp_mask,
 669                                  &rte_flow_item_udp_mask,
 670                                  sizeof(struct rte_flow_item_udp),
 671                                  error);
 672         if (rc != 0)
 673                 return rc;
 674
 675         /*
 676          * Filtering by UDP source and destination ports requires
 677          * the appropriate IP_PROTO in hardware filters
 678          */
 679         if (!(efx_spec->efs_match_flags & EFX_FILTER_MATCH_IP_PROTO)) {
 680                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_IP_PROTO;
 681                 efx_spec->efs_ip_proto = EFX_IPPROTO_UDP;
 682         } else if (efx_spec->efs_ip_proto != EFX_IPPROTO_UDP) {
 683                 rte_flow_error_set(error, EINVAL,
 684                         RTE_FLOW_ERROR_TYPE_ITEM, item,
 685                         "IP proto in pattern with UDP item should be appropriate");
 686                 return -rte_errno;
 687         }
 688
 689         if (spec == NULL)
 690                 return 0;
 691
 692         /*
 693          * Source and destination ports are in big-endian byte order in item and
 694          * in little-endian in efx_spec, so byte swap is used
 695          */
 696         if (mask->hdr.src_port == supp_mask.hdr.src_port) {
 697                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_REM_PORT;
 698                 efx_spec->efs_rem_port = rte_bswap16(spec->hdr.src_port);
 699         } else if (mask->hdr.src_port != 0) {
 700                 goto fail_bad_mask;
 701         }
 702
 703         if (mask->hdr.dst_port == supp_mask.hdr.dst_port) {
 704                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_LOC_PORT;
 705                 efx_spec->efs_loc_port = rte_bswap16(spec->hdr.dst_port);
 706         } else if (mask->hdr.dst_port != 0) {
 707                 goto fail_bad_mask;
 708         }
 709
 710         return 0;
 711
 712 fail_bad_mask:
 713         rte_flow_error_set(error, EINVAL,
 714                            RTE_FLOW_ERROR_TYPE_ITEM, item,
 715                            "Bad mask in the UDP pattern item");
 716         return -rte_errno;
 717 }
 718
 719 static const struct sfc_flow_item sfc_flow_items[] = {
 720         {
 721                 .type = RTE_FLOW_ITEM_TYPE_VOID,
 722                 .prev_layer = SFC_FLOW_ITEM_ANY_LAYER,
 723                 .layer = SFC_FLOW_ITEM_ANY_LAYER,
 724                 .parse = sfc_flow_parse_void,
 725         },
 726         {
 727                 .type = RTE_FLOW_ITEM_TYPE_ETH,
 728                 .prev_layer = SFC_FLOW_ITEM_START_LAYER,
 729                 .layer = SFC_FLOW_ITEM_L2,
 730                 .parse = sfc_flow_parse_eth,
 731         },
 732         {
 733                 .type = RTE_FLOW_ITEM_TYPE_VLAN,
 734                 .prev_layer = SFC_FLOW_ITEM_L2,
 735                 .layer = SFC_FLOW_ITEM_L2,
 736                 .parse = sfc_flow_parse_vlan,
 737         },
 738         {
 739                 .type = RTE_FLOW_ITEM_TYPE_IPV4,
 740                 .prev_layer = SFC_FLOW_ITEM_L2,
 741                 .layer = SFC_FLOW_ITEM_L3,
 742                 .parse = sfc_flow_parse_ipv4,
 743         },
 744         {
 745                 .type = RTE_FLOW_ITEM_TYPE_IPV6,
 746                 .prev_layer = SFC_FLOW_ITEM_L2,
 747                 .layer = SFC_FLOW_ITEM_L3,
 748                 .parse = sfc_flow_parse_ipv6,
 749         },
 750         {
 751                 .type = RTE_FLOW_ITEM_TYPE_TCP,
 752                 .prev_layer = SFC_FLOW_ITEM_L3,
 753                 .layer = SFC_FLOW_ITEM_L4,
 754                 .parse = sfc_flow_parse_tcp,
 755         },
 756         {
 757                 .type = RTE_FLOW_ITEM_TYPE_UDP,
 758                 .prev_layer = SFC_FLOW_ITEM_L3,
 759                 .layer = SFC_FLOW_ITEM_L4,
 760                 .parse = sfc_flow_parse_udp,
 761         },
 762 };
 763
 764 /*
 765  * Protocol-independent flow API support
 766  */
 767 static int
 768 sfc_flow_parse_attr(const struct rte_flow_attr *attr,
 769                     struct rte_flow *flow,
 770                     struct rte_flow_error *error)
 771 {
 772         if (attr == NULL) {
 773                 rte_flow_error_set(error, EINVAL,
 774                                    RTE_FLOW_ERROR_TYPE_ATTR, NULL,
 775                                    "NULL attribute");
 776                 return -rte_errno;
 777         }
 778         if (attr->group != 0) {
 779                 rte_flow_error_set(error, ENOTSUP,
 780                                    RTE_FLOW_ERROR_TYPE_ATTR_GROUP, attr,
 781                                    "Groups are not supported");
 782                 return -rte_errno;
 783         }
 784         if (attr->priority != 0) {
 785                 rte_flow_error_set(error, ENOTSUP,
 786                                    RTE_FLOW_ERROR_TYPE_ATTR_PRIORITY, attr,
 787                                    "Priorities are not supported");
 788                 return -rte_errno;
 789         }
 790         if (attr->egress != 0) {
 791                 rte_flow_error_set(error, ENOTSUP,
 792                                    RTE_FLOW_ERROR_TYPE_ATTR_EGRESS, attr,
 793                                    "Egress is not supported");
 794                 return -rte_errno;
 795         }
 796         if (attr->ingress == 0) {
 797                 rte_flow_error_set(error, ENOTSUP,
 798                                    RTE_FLOW_ERROR_TYPE_ATTR_INGRESS, attr,
 799                                    "Only ingress is supported");
 800                 return -rte_errno;
 801         }
 802
 803         flow->spec.efs_flags |= EFX_FILTER_FLAG_RX;
 804         flow->spec.efs_rss_context = EFX_RSS_CONTEXT_DEFAULT;
 805
 806         return 0;
 807 }
 808
 809 /* Get item from array sfc_flow_items */
 810 static const struct sfc_flow_item *
 811 sfc_flow_get_item(enum rte_flow_item_type type)
 812 {
 813         unsigned int i;
 814
 815         for (i = 0; i < RTE_DIM(sfc_flow_items); i++)
 816                 if (sfc_flow_items[i].type == type)
 817                         return &sfc_flow_items[i];
 818
 819         return NULL;
 820 }
 821
 822 static int
 823 sfc_flow_parse_pattern(const struct rte_flow_item pattern[],
 824                        struct rte_flow *flow,
 825                        struct rte_flow_error *error)
 826 {
 827         int rc;
 828         unsigned int prev_layer = SFC_FLOW_ITEM_ANY_LAYER;
 829         const struct sfc_flow_item *item;
 830
 831         if (pattern == NULL) {
 832                 rte_flow_error_set(error, EINVAL,
 833                                    RTE_FLOW_ERROR_TYPE_ITEM_NUM, NULL,
 834                                    "NULL pattern");
 835                 return -rte_errno;
 836         }
 837
 838         for (; pattern->type != RTE_FLOW_ITEM_TYPE_END; pattern++) {
 839                 item = sfc_flow_get_item(pattern->type);
 840                 if (item == NULL) {
 841                         rte_flow_error_set(error, ENOTSUP,
 842                                            RTE_FLOW_ERROR_TYPE_ITEM, pattern,
 843                                            "Unsupported pattern item");
 844                         return -rte_errno;
 845                 }
 846
 847                 /*
 848                  * Omitting one or several protocol layers at the beginning
 849                  * of pattern is supported
 850                  */
 851                 if (item->prev_layer != SFC_FLOW_ITEM_ANY_LAYER &&
 852                     prev_layer != SFC_FLOW_ITEM_ANY_LAYER &&
 853                     item->prev_layer != prev_layer) {
 854                         rte_flow_error_set(error, ENOTSUP,
 855                                            RTE_FLOW_ERROR_TYPE_ITEM, pattern,
 856                                            "Unexpected sequence of pattern items");
 857                         return -rte_errno;
 858                 }
 859
 860                 rc = item->parse(pattern, &flow->spec, error);
 861                 if (rc != 0)
 862                         return rc;
 863
 864                 if (item->layer != SFC_FLOW_ITEM_ANY_LAYER)
 865                         prev_layer = item->layer;
 866         }
 867
 868         return 0;
 869 }
 870
 871 static int
 872 sfc_flow_parse_queue(struct sfc_adapter *sa,
 873                      const struct rte_flow_action_queue *queue,
 874                      struct rte_flow *flow)
 875 {
 876         struct sfc_rxq *rxq;
 877
 878         if (queue->index >= sa->rxq_count)
 879                 return -EINVAL;
 880
 881         rxq = sa->rxq_info[queue->index].rxq;
 882         flow->spec.efs_dmaq_id = (uint16_t)rxq->hw_index;
 883
 884         return 0;
 885 }
 886
 887 #if EFSYS_OPT_RX_SCALE
 888 static int
 889 sfc_flow_parse_rss(struct sfc_adapter *sa,
 890                    const struct rte_flow_action_rss *rss,
 891                    struct rte_flow *flow)
 892 {
 893         unsigned int rxq_sw_index;
 894         struct sfc_rxq *rxq;
 895         unsigned int rxq_hw_index_min;
 896         unsigned int rxq_hw_index_max;
 897         const struct rte_eth_rss_conf *rss_conf = rss->rss_conf;
 898         uint64_t rss_hf;
 899         uint8_t *rss_key = NULL;
 900         struct sfc_flow_rss *sfc_rss_conf = &flow->rss_conf;
 901         unsigned int i;
 902
 903         if (rss->num == 0)
 904                 return -EINVAL;
 905
 906         rxq_sw_index = sa->rxq_count - 1;
 907         rxq = sa->rxq_info[rxq_sw_index].rxq;
 908         rxq_hw_index_min = rxq->hw_index;
 909         rxq_hw_index_max = 0;
 910
 911         for (i = 0; i < rss->num; ++i) {
 912                 rxq_sw_index = rss->queue[i];
 913
 914                 if (rxq_sw_index >= sa->rxq_count)
 915                         return -EINVAL;
 916
 917                 rxq = sa->rxq_info[rxq_sw_index].rxq;
 918
 919                 if (rxq->hw_index < rxq_hw_index_min)
 920                         rxq_hw_index_min = rxq->hw_index;
 921
 922                 if (rxq->hw_index > rxq_hw_index_max)
 923                         rxq_hw_index_max = rxq->hw_index;
 924         }
 925
 926         rss_hf = (rss_conf != NULL) ? rss_conf->rss_hf : SFC_RSS_OFFLOADS;
 927         if ((rss_hf & ~SFC_RSS_OFFLOADS) != 0)
 928                 return -EINVAL;
 929
 930         if (rss_conf != NULL) {
 931                 if (rss_conf->rss_key_len != sizeof(sa->rss_key))
 932                         return -EINVAL;
 933
 934                 rss_key = rss_conf->rss_key;
 935         } else {
 936                 rss_key = sa->rss_key;
 937         }
 938
 939         flow->rss = B_TRUE;
 940
 941         sfc_rss_conf->rxq_hw_index_min = rxq_hw_index_min;
 942         sfc_rss_conf->rxq_hw_index_max = rxq_hw_index_max;
 943         sfc_rss_conf->rss_hash_types = sfc_rte_to_efx_hash_type(rss_hf);
 944         rte_memcpy(sfc_rss_conf->rss_key, rss_key, sizeof(sa->rss_key));
 945
 946         for (i = 0; i < RTE_DIM(sfc_rss_conf->rss_tbl); ++i) {
 947                 unsigned int rxq_sw_index = rss->queue[i % rss->num];
 948                 struct sfc_rxq *rxq = sa->rxq_info[rxq_sw_index].rxq;
 949
 950                 sfc_rss_conf->rss_tbl[i] = rxq->hw_index - rxq_hw_index_min;
 951         }
 952
 953         return 0;
 954 }
 955 #endif /* EFSYS_OPT_RX_SCALE */
 956
 957 static int
 958 sfc_flow_filter_insert(struct sfc_adapter *sa,
 959                        struct rte_flow *flow)
 960 {
 961         efx_filter_spec_t *spec = &flow->spec;
 962
 963 #if EFSYS_OPT_RX_SCALE
 964         struct sfc_flow_rss *rss = &flow->rss_conf;
 965         int rc = 0;
 966
 967         if (flow->rss) {
 968                 unsigned int rss_spread = MIN(rss->rxq_hw_index_max -
 969                                               rss->rxq_hw_index_min + 1,
 970                                               EFX_MAXRSS);
 971
 972                 rc = efx_rx_scale_context_alloc(sa->nic,
 973                                                 EFX_RX_SCALE_EXCLUSIVE,
 974                                                 rss_spread,
 975                                                 &spec->efs_rss_context);
 976                 if (rc != 0)
 977                         goto fail_scale_context_alloc;
 978
 979                 rc = efx_rx_scale_mode_set(sa->nic, spec->efs_rss_context,
 980                                            EFX_RX_HASHALG_TOEPLITZ,
 981                                            rss->rss_hash_types, B_TRUE);
 982                 if (rc != 0)
 983                         goto fail_scale_mode_set;
 984
 985                 rc = efx_rx_scale_key_set(sa->nic, spec->efs_rss_context,
 986                                           rss->rss_key,
 987                                           sizeof(sa->rss_key));
 988                 if (rc != 0)
 989                         goto fail_scale_key_set;
 990
 991                 spec->efs_dmaq_id = rss->rxq_hw_index_min;
 992                 spec->efs_flags |= EFX_FILTER_FLAG_RX_RSS;
 993         }
 994
 995         rc = efx_filter_insert(sa->nic, spec);
 996         if (rc != 0)
 997                 goto fail_filter_insert;
 998
 999         if (flow->rss) {
1000                 /*
1001                  * Scale table is set after filter insertion because
1002                  * the table entries are relative to the base RxQ ID
1003                  * and the latter is submitted to the HW by means of
1004                  * inserting a filter, so by the time of the request
1005                  * the HW knows all the information needed to verify
1006                  * the table entries, and the operation will succeed
1007                  */
1008                 rc = efx_rx_scale_tbl_set(sa->nic, spec->efs_rss_context,
1009                                           rss->rss_tbl, RTE_DIM(rss->rss_tbl));
1010                 if (rc != 0)
1011                         goto fail_scale_tbl_set;
1012         }
1013
1014         return 0;
1015
1016 fail_scale_tbl_set:
1017         efx_filter_remove(sa->nic, spec);
1018
1019 fail_filter_insert:
1020 fail_scale_key_set:
1021 fail_scale_mode_set:
1022         if (flow->rss)
1023                 efx_rx_scale_context_free(sa->nic, spec->efs_rss_context);
1024
1025 fail_scale_context_alloc:
1026         return rc;
1027 #else /* !EFSYS_OPT_RX_SCALE */
1028         return efx_filter_insert(sa->nic, spec);
1029 #endif /* EFSYS_OPT_RX_SCALE */
1030 }
1031
1032 static int
1033 sfc_flow_filter_remove(struct sfc_adapter *sa,
1034                        struct rte_flow *flow)
1035 {
1036         efx_filter_spec_t *spec = &flow->spec;
1037         int rc = 0;
1038
1039         rc = efx_filter_remove(sa->nic, spec);
1040         if (rc != 0)
1041                 return rc;
1042
1043 #if EFSYS_OPT_RX_SCALE
1044         if (flow->rss)
1045                 rc = efx_rx_scale_context_free(sa->nic, spec->efs_rss_context);
1046 #endif /* EFSYS_OPT_RX_SCALE */
1047
1048         return rc;
1049 }
1050
1051 static int
1052 sfc_flow_parse_actions(struct sfc_adapter *sa,
1053                        const struct rte_flow_action actions[],
1054                        struct rte_flow *flow,
1055                        struct rte_flow_error *error)
1056 {
1057         int rc;
1058         boolean_t is_specified = B_FALSE;
1059
1060         if (actions == NULL) {
1061                 rte_flow_error_set(error, EINVAL,
1062                                    RTE_FLOW_ERROR_TYPE_ACTION_NUM, NULL,
1063                                    "NULL actions");
1064                 return -rte_errno;
1065         }
1066
1067         for (; actions->type != RTE_FLOW_ACTION_TYPE_END; actions++) {
1068                 switch (actions->type) {
1069                 case RTE_FLOW_ACTION_TYPE_VOID:
1070                         break;
1071
1072                 case RTE_FLOW_ACTION_TYPE_QUEUE:
1073                         rc = sfc_flow_parse_queue(sa, actions->conf, flow);
1074                         if (rc != 0) {
1075                                 rte_flow_error_set(error, EINVAL,
1076                                         RTE_FLOW_ERROR_TYPE_ACTION, actions,
1077                                         "Bad QUEUE action");
1078                                 return -rte_errno;
1079                         }
1080
1081                         is_specified = B_TRUE;
1082                         break;
1083
1084 #if EFSYS_OPT_RX_SCALE
1085                 case RTE_FLOW_ACTION_TYPE_RSS:
1086                         rc = sfc_flow_parse_rss(sa, actions->conf, flow);
1087                         if (rc != 0) {
1088                                 rte_flow_error_set(error, rc,
1089                                         RTE_FLOW_ERROR_TYPE_ACTION, actions,
1090                                         "Bad RSS action");
1091                                 return -rte_errno;
1092                         }
1093
1094                         is_specified = B_TRUE;
1095                         break;
1096 #endif /* EFSYS_OPT_RX_SCALE */
1097
1098                 default:
1099                         rte_flow_error_set(error, ENOTSUP,
1100                                            RTE_FLOW_ERROR_TYPE_ACTION, actions,
1101                                            "Action is not supported");
1102                         return -rte_errno;
1103                 }
1104         }
1105
1106         if (!is_specified) {
1107                 rte_flow_error_set(error, EINVAL,
1108                                    RTE_FLOW_ERROR_TYPE_ACTION_NUM, actions,
1109                                    "Action is unspecified");
1110                 return -rte_errno;
1111         }
1112
1113         return 0;
1114 }
1115
1116 static int
1117 sfc_flow_parse(struct rte_eth_dev *dev,
1118                const struct rte_flow_attr *attr,
1119                const struct rte_flow_item pattern[],
1120                const struct rte_flow_action actions[],
1121                struct rte_flow *flow,
1122                struct rte_flow_error *error)
1123 {
1124         struct sfc_adapter *sa = dev->data->dev_private;
1125         int rc;
1126
1127         rc = sfc_flow_parse_attr(attr, flow, error);
1128         if (rc != 0)
1129                 goto fail_bad_value;
1130
1131         rc = sfc_flow_parse_pattern(pattern, flow, error);
1132         if (rc != 0)
1133                 goto fail_bad_value;
1134
1135         rc = sfc_flow_parse_actions(sa, actions, flow, error);
1136         if (rc != 0)
1137                 goto fail_bad_value;
1138
1139         if (!sfc_filter_is_match_supported(sa, flow->spec.efs_match_flags)) {
1140                 rte_flow_error_set(error, ENOTSUP,
1141                                    RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
1142                                    "Flow rule pattern is not supported");
1143                 return -rte_errno;
1144         }
1145
1146 fail_bad_value:
1147         return rc;
1148 }
1149
1150 static int
1151 sfc_flow_validate(struct rte_eth_dev *dev,
1152                   const struct rte_flow_attr *attr,
1153                   const struct rte_flow_item pattern[],
1154                   const struct rte_flow_action actions[],
1155                   struct rte_flow_error *error)
1156 {
1157         struct rte_flow flow;
1158
1159         memset(&flow, 0, sizeof(flow));
1160
1161         return sfc_flow_parse(dev, attr, pattern, actions, &flow, error);
1162 }
1163
1164 static struct rte_flow *
1165 sfc_flow_create(struct rte_eth_dev *dev,
1166                 const struct rte_flow_attr *attr,
1167                 const struct rte_flow_item pattern[],
1168                 const struct rte_flow_action actions[],
1169                 struct rte_flow_error *error)
1170 {
1171         struct sfc_adapter *sa = dev->data->dev_private;
1172         struct rte_flow *flow = NULL;
1173         int rc;
1174
1175         flow = rte_zmalloc("sfc_rte_flow", sizeof(*flow), 0);
1176         if (flow == NULL) {
1177                 rte_flow_error_set(error, ENOMEM,
1178                                    RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
1179                                    "Failed to allocate memory");
1180                 goto fail_no_mem;
1181         }
1182
1183         rc = sfc_flow_parse(dev, attr, pattern, actions, flow, error);
1184         if (rc != 0)
1185                 goto fail_bad_value;
1186
1187         TAILQ_INSERT_TAIL(&sa->filter.flow_list, flow, entries);
1188
1189         sfc_adapter_lock(sa);
1190
1191         if (sa->state == SFC_ADAPTER_STARTED) {
1192                 rc = sfc_flow_filter_insert(sa, flow);
1193                 if (rc != 0) {
1194                         rte_flow_error_set(error, rc,
1195                                 RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
1196                                 "Failed to insert filter");
1197                         goto fail_filter_insert;
1198                 }
1199         }
1200
1201         sfc_adapter_unlock(sa);
1202
1203         return flow;
1204
1205 fail_filter_insert:
1206         TAILQ_REMOVE(&sa->filter.flow_list, flow, entries);
1207
1208 fail_bad_value:
1209         rte_free(flow);
1210         sfc_adapter_unlock(sa);
1211
1212 fail_no_mem:
1213         return NULL;
1214 }
1215
1216 static int
1217 sfc_flow_remove(struct sfc_adapter *sa,
1218                 struct rte_flow *flow,
1219                 struct rte_flow_error *error)
1220 {
1221         int rc = 0;
1222
1223         SFC_ASSERT(sfc_adapter_is_locked(sa));
1224
1225         if (sa->state == SFC_ADAPTER_STARTED) {
1226                 rc = sfc_flow_filter_remove(sa, flow);
1227                 if (rc != 0)
1228                         rte_flow_error_set(error, rc,
1229                                 RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
1230                                 "Failed to destroy flow rule");
1231         }
1232
1233         TAILQ_REMOVE(&sa->filter.flow_list, flow, entries);
1234         rte_free(flow);
1235
1236         return rc;
1237 }
1238
1239 static int
1240 sfc_flow_destroy(struct rte_eth_dev *dev,
1241                  struct rte_flow *flow,
1242                  struct rte_flow_error *error)
1243 {
1244         struct sfc_adapter *sa = dev->data->dev_private;
1245         struct rte_flow *flow_ptr;
1246         int rc = EINVAL;
1247
1248         sfc_adapter_lock(sa);
1249
1250         TAILQ_FOREACH(flow_ptr, &sa->filter.flow_list, entries) {
1251                 if (flow_ptr == flow)
1252                         rc = 0;
1253         }
1254         if (rc != 0) {
1255                 rte_flow_error_set(error, rc,
1256                                    RTE_FLOW_ERROR_TYPE_HANDLE, NULL,
1257                                    "Failed to find flow rule to destroy");
1258                 goto fail_bad_value;
1259         }
1260
1261         rc = sfc_flow_remove(sa, flow, error);
1262
1263 fail_bad_value:
1264         sfc_adapter_unlock(sa);
1265
1266         return -rc;
1267 }
1268
1269 static int
1270 sfc_flow_flush(struct rte_eth_dev *dev,
1271                struct rte_flow_error *error)
1272 {
1273         struct sfc_adapter *sa = dev->data->dev_private;
1274         struct rte_flow *flow;
1275         int rc = 0;
1276         int ret = 0;
1277
1278         sfc_adapter_lock(sa);
1279
1280         while ((flow = TAILQ_FIRST(&sa->filter.flow_list)) != NULL) {
1281                 rc = sfc_flow_remove(sa, flow, error);
1282                 if (rc != 0)
1283                         ret = rc;
1284         }
1285
1286         sfc_adapter_unlock(sa);
1287
1288         return -ret;
1289 }
1290
1291 static int
1292 sfc_flow_isolate(struct rte_eth_dev *dev, int enable,
1293                  struct rte_flow_error *error)
1294 {
1295         struct sfc_adapter *sa = dev->data->dev_private;
1296         struct sfc_port *port = &sa->port;
1297         int ret = 0;
1298
1299         sfc_adapter_lock(sa);
1300         if (sa->state != SFC_ADAPTER_INITIALIZED) {
1301                 rte_flow_error_set(error, EBUSY,
1302                                    RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
1303                                    NULL, "please close the port first");
1304                 ret = -rte_errno;
1305         } else {
1306                 port->isolated = (enable) ? B_TRUE : B_FALSE;
1307         }
1308         sfc_adapter_unlock(sa);
1309
1310         return ret;
1311 }
1312
1313 const struct rte_flow_ops sfc_flow_ops = {
1314         .validate = sfc_flow_validate,
1315         .create = sfc_flow_create,
1316         .destroy = sfc_flow_destroy,
1317         .flush = sfc_flow_flush,
1318         .query = NULL,
1319         .isolate = sfc_flow_isolate,
1320 };
1321
1322 void
1323 sfc_flow_init(struct sfc_adapter *sa)
1324 {
1325         SFC_ASSERT(sfc_adapter_is_locked(sa));
1326
1327         TAILQ_INIT(&sa->filter.flow_list);
1328 }
1329
1330 void
1331 sfc_flow_fini(struct sfc_adapter *sa)
1332 {
1333         struct rte_flow *flow;
1334
1335         SFC_ASSERT(sfc_adapter_is_locked(sa));
1336
1337         while ((flow = TAILQ_FIRST(&sa->filter.flow_list)) != NULL) {
1338                 TAILQ_REMOVE(&sa->filter.flow_list, flow, entries);
1339                 rte_free(flow);
1340         }
1341 }
1342
1343 void
1344 sfc_flow_stop(struct sfc_adapter *sa)
1345 {
1346         struct rte_flow *flow;
1347
1348         SFC_ASSERT(sfc_adapter_is_locked(sa));
1349
1350         TAILQ_FOREACH(flow, &sa->filter.flow_list, entries)
1351                 sfc_flow_filter_remove(sa, flow);
1352 }
1353
1354 int
1355 sfc_flow_start(struct sfc_adapter *sa)
1356 {
1357         struct rte_flow *flow;
1358         int rc = 0;
1359
1360         sfc_log_init(sa, "entry");
1361
1362         SFC_ASSERT(sfc_adapter_is_locked(sa));
1363
1364         TAILQ_FOREACH(flow, &sa->filter.flow_list, entries) {
1365                 rc = sfc_flow_filter_insert(sa, flow);
1366                 if (rc != 0)
1367                         goto fail_bad_flow;
1368         }
1369
1370         sfc_log_init(sa, "done");
1371
1372 fail_bad_flow:
1373         return rc;
1374 }