drivers/net/sfc/sfc_flow.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  *
   3  * Copyright (c) 2017-2018 Solarflare Communications Inc.
   4  * All rights reserved.
   5  *
   6  * This software was jointly developed between OKTET Labs (under contract
   7  * for Solarflare) and Solarflare Communications, Inc.
   8  */
   9
  10 #include <rte_byteorder.h>
  11 #include <rte_tailq.h>
  12 #include <rte_common.h>
  13 #include <rte_ethdev_driver.h>
  14 #include <rte_ether.h>
  15 #include <rte_flow.h>
  16 #include <rte_flow_driver.h>
  17
  18 #include "efx.h"
  19
  20 #include "sfc.h"
  21 #include "sfc_rx.h"
  22 #include "sfc_filter.h"
  23 #include "sfc_flow.h"
  24 #include "sfc_log.h"
  25 #include "sfc_dp_rx.h"
  26
  27 struct sfc_flow_ops_by_spec {
  28         sfc_flow_parse_cb_t     *parse;
  29         sfc_flow_insert_cb_t    *insert;
  30         sfc_flow_remove_cb_t    *remove;
  31 };
  32
  33 static sfc_flow_parse_cb_t sfc_flow_parse_rte_to_filter;
  34 static sfc_flow_insert_cb_t sfc_flow_filter_insert;
  35 static sfc_flow_remove_cb_t sfc_flow_filter_remove;
  36
  37 static const struct sfc_flow_ops_by_spec sfc_flow_ops_filter = {
  38         .parse = sfc_flow_parse_rte_to_filter,
  39         .insert = sfc_flow_filter_insert,
  40         .remove = sfc_flow_filter_remove,
  41 };
  42
  43 static const struct sfc_flow_ops_by_spec *
  44 sfc_flow_get_ops_by_spec(struct rte_flow *flow)
  45 {
  46         struct sfc_flow_spec *spec = &flow->spec;
  47         const struct sfc_flow_ops_by_spec *ops = NULL;
  48
  49         switch (spec->type) {
  50         case SFC_FLOW_SPEC_FILTER:
  51                 ops = &sfc_flow_ops_filter;
  52                 break;
  53         default:
  54                 SFC_ASSERT(false);
  55                 break;
  56         }
  57
  58         return ops;
  59 }
  60
  61 /*
  62  * Currently, filter-based (VNIC) flow API is implemented in such a manner
  63  * that each flow rule is converted to one or more hardware filters.
  64  * All elements of flow rule (attributes, pattern items, actions)
  65  * correspond to one or more fields in the efx_filter_spec_s structure
  66  * that is responsible for the hardware filter.
  67  * If some required field is unset in the flow rule, then a handful
  68  * of filter copies will be created to cover all possible values
  69  * of such a field.
  70  */
  71
  72 static sfc_flow_item_parse sfc_flow_parse_void;
  73 static sfc_flow_item_parse sfc_flow_parse_eth;
  74 static sfc_flow_item_parse sfc_flow_parse_vlan;
  75 static sfc_flow_item_parse sfc_flow_parse_ipv4;
  76 static sfc_flow_item_parse sfc_flow_parse_ipv6;
  77 static sfc_flow_item_parse sfc_flow_parse_tcp;
  78 static sfc_flow_item_parse sfc_flow_parse_udp;
  79 static sfc_flow_item_parse sfc_flow_parse_vxlan;
  80 static sfc_flow_item_parse sfc_flow_parse_geneve;
  81 static sfc_flow_item_parse sfc_flow_parse_nvgre;
  82
  83 typedef int (sfc_flow_spec_set_vals)(struct sfc_flow_spec *spec,
  84                                      unsigned int filters_count_for_one_val,
  85                                      struct rte_flow_error *error);
  86
  87 typedef boolean_t (sfc_flow_spec_check)(efx_filter_match_flags_t match,
  88                                         efx_filter_spec_t *spec,
  89                                         struct sfc_filter *filter);
  90
  91 struct sfc_flow_copy_flag {
  92         /* EFX filter specification match flag */
  93         efx_filter_match_flags_t flag;
  94         /* Number of values of corresponding field */
  95         unsigned int vals_count;
  96         /* Function to set values in specifications */
  97         sfc_flow_spec_set_vals *set_vals;
  98         /*
  99          * Function to check that the specification is suitable
 100          * for adding this match flag
 101          */
 102         sfc_flow_spec_check *spec_check;
 103 };
 104
 105 static sfc_flow_spec_set_vals sfc_flow_set_unknown_dst_flags;
 106 static sfc_flow_spec_check sfc_flow_check_unknown_dst_flags;
 107 static sfc_flow_spec_set_vals sfc_flow_set_ethertypes;
 108 static sfc_flow_spec_set_vals sfc_flow_set_ifrm_unknown_dst_flags;
 109 static sfc_flow_spec_check sfc_flow_check_ifrm_unknown_dst_flags;
 110 static sfc_flow_spec_set_vals sfc_flow_set_outer_vid_flag;
 111 static sfc_flow_spec_check sfc_flow_check_outer_vid_flag;
 112
 113 static boolean_t
 114 sfc_flow_is_zero(const uint8_t *buf, unsigned int size)
 115 {
 116         uint8_t sum = 0;
 117         unsigned int i;
 118
 119         for (i = 0; i < size; i++)
 120                 sum |= buf[i];
 121
 122         return (sum == 0) ? B_TRUE : B_FALSE;
 123 }
 124
 125 /*
 126  * Validate item and prepare structures spec and mask for parsing
 127  */
 128 int
 129 sfc_flow_parse_init(const struct rte_flow_item *item,
 130                     const void **spec_ptr,
 131                     const void **mask_ptr,
 132                     const void *supp_mask,
 133                     const void *def_mask,
 134                     unsigned int size,
 135                     struct rte_flow_error *error)
 136 {
 137         const uint8_t *spec;
 138         const uint8_t *mask;
 139         const uint8_t *last;
 140         uint8_t supp;
 141         unsigned int i;
 142
 143         if (item == NULL) {
 144                 rte_flow_error_set(error, EINVAL,
 145                                    RTE_FLOW_ERROR_TYPE_ITEM, NULL,
 146                                    "NULL item");
 147                 return -rte_errno;
 148         }
 149
 150         if ((item->last != NULL || item->mask != NULL) && item->spec == NULL) {
 151                 rte_flow_error_set(error, EINVAL,
 152                                    RTE_FLOW_ERROR_TYPE_ITEM, item,
 153                                    "Mask or last is set without spec");
 154                 return -rte_errno;
 155         }
 156
 157         /*
 158          * If "mask" is not set, default mask is used,
 159          * but if default mask is NULL, "mask" should be set
 160          */
 161         if (item->mask == NULL) {
 162                 if (def_mask == NULL) {
 163                         rte_flow_error_set(error, EINVAL,
 164                                 RTE_FLOW_ERROR_TYPE_ITEM, NULL,
 165                                 "Mask should be specified");
 166                         return -rte_errno;
 167                 }
 168
 169                 mask = def_mask;
 170         } else {
 171                 mask = item->mask;
 172         }
 173
 174         spec = item->spec;
 175         last = item->last;
 176
 177         if (spec == NULL)
 178                 goto exit;
 179
 180         /*
 181          * If field values in "last" are either 0 or equal to the corresponding
 182          * values in "spec" then they are ignored
 183          */
 184         if (last != NULL &&
 185             !sfc_flow_is_zero(last, size) &&
 186             memcmp(last, spec, size) != 0) {
 187                 rte_flow_error_set(error, ENOTSUP,
 188                                    RTE_FLOW_ERROR_TYPE_ITEM, item,
 189                                    "Ranging is not supported");
 190                 return -rte_errno;
 191         }
 192
 193         if (supp_mask == NULL) {
 194                 rte_flow_error_set(error, EINVAL,
 195                         RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
 196                         "Supported mask for item should be specified");
 197                 return -rte_errno;
 198         }
 199
 200         /* Check that mask does not ask for more match than supp_mask */
 201         for (i = 0; i < size; i++) {
 202                 supp = ((const uint8_t *)supp_mask)[i];
 203
 204                 if (~supp & mask[i]) {
 205                         rte_flow_error_set(error, ENOTSUP,
 206                                            RTE_FLOW_ERROR_TYPE_ITEM, item,
 207                                            "Item's field is not supported");
 208                         return -rte_errno;
 209                 }
 210         }
 211
 212 exit:
 213         *spec_ptr = spec;
 214         *mask_ptr = mask;
 215         return 0;
 216 }
 217
 218 /*
 219  * Protocol parsers.
 220  * Masking is not supported, so masks in items should be either
 221  * full or empty (zeroed) and set only for supported fields which
 222  * are specified in the supp_mask.
 223  */
 224
 225 static int
 226 sfc_flow_parse_void(__rte_unused const struct rte_flow_item *item,
 227                     __rte_unused struct sfc_flow_parse_ctx *parse_ctx,
 228                     __rte_unused struct rte_flow_error *error)
 229 {
 230         return 0;
 231 }
 232
 233 /**
 234  * Convert Ethernet item to EFX filter specification.
 235  *
 236  * @param item[in]
 237  *   Item specification. Outer frame specification may only comprise
 238  *   source/destination addresses and Ethertype field.
 239  *   Inner frame specification may contain destination address only.
 240  *   There is support for individual/group mask as well as for empty and full.
 241  *   If the mask is NULL, default mask will be used. Ranging is not supported.
 242  * @param efx_spec[in, out]
 243  *   EFX filter specification to update.
 244  * @param[out] error
 245  *   Perform verbose error reporting if not NULL.
 246  */
 247 static int
 248 sfc_flow_parse_eth(const struct rte_flow_item *item,
 249                    struct sfc_flow_parse_ctx *parse_ctx,
 250                    struct rte_flow_error *error)
 251 {
 252         int rc;
 253         efx_filter_spec_t *efx_spec = parse_ctx->filter;
 254         const struct rte_flow_item_eth *spec = NULL;
 255         const struct rte_flow_item_eth *mask = NULL;
 256         const struct rte_flow_item_eth supp_mask = {
 257                 .dst.addr_bytes = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff },
 258                 .src.addr_bytes = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff },
 259                 .type = 0xffff,
 260         };
 261         const struct rte_flow_item_eth ifrm_supp_mask = {
 262                 .dst.addr_bytes = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff },
 263         };
 264         const uint8_t ig_mask[EFX_MAC_ADDR_LEN] = {
 265                 0x01, 0x00, 0x00, 0x00, 0x00, 0x00
 266         };
 267         const struct rte_flow_item_eth *supp_mask_p;
 268         const struct rte_flow_item_eth *def_mask_p;
 269         uint8_t *loc_mac = NULL;
 270         boolean_t is_ifrm = (efx_spec->efs_encap_type !=
 271                 EFX_TUNNEL_PROTOCOL_NONE);
 272
 273         if (is_ifrm) {
 274                 supp_mask_p = &ifrm_supp_mask;
 275                 def_mask_p = &ifrm_supp_mask;
 276                 loc_mac = efx_spec->efs_ifrm_loc_mac;
 277         } else {
 278                 supp_mask_p = &supp_mask;
 279                 def_mask_p = &rte_flow_item_eth_mask;
 280                 loc_mac = efx_spec->efs_loc_mac;
 281         }
 282
 283         rc = sfc_flow_parse_init(item,
 284                                  (const void **)&spec,
 285                                  (const void **)&mask,
 286                                  supp_mask_p, def_mask_p,
 287                                  sizeof(struct rte_flow_item_eth),
 288                                  error);
 289         if (rc != 0)
 290                 return rc;
 291
 292         /* If "spec" is not set, could be any Ethernet */
 293         if (spec == NULL)
 294                 return 0;
 295
 296         if (rte_is_same_ether_addr(&mask->dst, &supp_mask.dst)) {
 297                 efx_spec->efs_match_flags |= is_ifrm ?
 298                         EFX_FILTER_MATCH_IFRM_LOC_MAC :
 299                         EFX_FILTER_MATCH_LOC_MAC;
 300                 rte_memcpy(loc_mac, spec->dst.addr_bytes,
 301                            EFX_MAC_ADDR_LEN);
 302         } else if (memcmp(mask->dst.addr_bytes, ig_mask,
 303                           EFX_MAC_ADDR_LEN) == 0) {
 304                 if (rte_is_unicast_ether_addr(&spec->dst))
 305                         efx_spec->efs_match_flags |= is_ifrm ?
 306                                 EFX_FILTER_MATCH_IFRM_UNKNOWN_UCAST_DST :
 307                                 EFX_FILTER_MATCH_UNKNOWN_UCAST_DST;
 308                 else
 309                         efx_spec->efs_match_flags |= is_ifrm ?
 310                                 EFX_FILTER_MATCH_IFRM_UNKNOWN_MCAST_DST :
 311                                 EFX_FILTER_MATCH_UNKNOWN_MCAST_DST;
 312         } else if (!rte_is_zero_ether_addr(&mask->dst)) {
 313                 goto fail_bad_mask;
 314         }
 315
 316         /*
 317          * ifrm_supp_mask ensures that the source address and
 318          * ethertype masks are equal to zero in inner frame,
 319          * so these fields are filled in only for the outer frame
 320          */
 321         if (rte_is_same_ether_addr(&mask->src, &supp_mask.src)) {
 322                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_REM_MAC;
 323                 rte_memcpy(efx_spec->efs_rem_mac, spec->src.addr_bytes,
 324                            EFX_MAC_ADDR_LEN);
 325         } else if (!rte_is_zero_ether_addr(&mask->src)) {
 326                 goto fail_bad_mask;
 327         }
 328
 329         /*
 330          * Ether type is in big-endian byte order in item and
 331          * in little-endian in efx_spec, so byte swap is used
 332          */
 333         if (mask->type == supp_mask.type) {
 334                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_ETHER_TYPE;
 335                 efx_spec->efs_ether_type = rte_bswap16(spec->type);
 336         } else if (mask->type != 0) {
 337                 goto fail_bad_mask;
 338         }
 339
 340         return 0;
 341
 342 fail_bad_mask:
 343         rte_flow_error_set(error, EINVAL,
 344                            RTE_FLOW_ERROR_TYPE_ITEM, item,
 345                            "Bad mask in the ETH pattern item");
 346         return -rte_errno;
 347 }
 348
 349 /**
 350  * Convert VLAN item to EFX filter specification.
 351  *
 352  * @param item[in]
 353  *   Item specification. Only VID field is supported.
 354  *   The mask can not be NULL. Ranging is not supported.
 355  * @param efx_spec[in, out]
 356  *   EFX filter specification to update.
 357  * @param[out] error
 358  *   Perform verbose error reporting if not NULL.
 359  */
 360 static int
 361 sfc_flow_parse_vlan(const struct rte_flow_item *item,
 362                     struct sfc_flow_parse_ctx *parse_ctx,
 363                     struct rte_flow_error *error)
 364 {
 365         int rc;
 366         uint16_t vid;
 367         efx_filter_spec_t *efx_spec = parse_ctx->filter;
 368         const struct rte_flow_item_vlan *spec = NULL;
 369         const struct rte_flow_item_vlan *mask = NULL;
 370         const struct rte_flow_item_vlan supp_mask = {
 371                 .tci = rte_cpu_to_be_16(ETH_VLAN_ID_MAX),
 372                 .inner_type = RTE_BE16(0xffff),
 373         };
 374
 375         rc = sfc_flow_parse_init(item,
 376                                  (const void **)&spec,
 377                                  (const void **)&mask,
 378                                  &supp_mask,
 379                                  NULL,
 380                                  sizeof(struct rte_flow_item_vlan),
 381                                  error);
 382         if (rc != 0)
 383                 return rc;
 384
 385         /*
 386          * VID is in big-endian byte order in item and
 387          * in little-endian in efx_spec, so byte swap is used.
 388          * If two VLAN items are included, the first matches
 389          * the outer tag and the next matches the inner tag.
 390          */
 391         if (mask->tci == supp_mask.tci) {
 392                 /* Apply mask to keep VID only */
 393                 vid = rte_bswap16(spec->tci & mask->tci);
 394
 395                 if (!(efx_spec->efs_match_flags &
 396                       EFX_FILTER_MATCH_OUTER_VID)) {
 397                         efx_spec->efs_match_flags |= EFX_FILTER_MATCH_OUTER_VID;
 398                         efx_spec->efs_outer_vid = vid;
 399                 } else if (!(efx_spec->efs_match_flags &
 400                              EFX_FILTER_MATCH_INNER_VID)) {
 401                         efx_spec->efs_match_flags |= EFX_FILTER_MATCH_INNER_VID;
 402                         efx_spec->efs_inner_vid = vid;
 403                 } else {
 404                         rte_flow_error_set(error, EINVAL,
 405                                            RTE_FLOW_ERROR_TYPE_ITEM, item,
 406                                            "More than two VLAN items");
 407                         return -rte_errno;
 408                 }
 409         } else {
 410                 rte_flow_error_set(error, EINVAL,
 411                                    RTE_FLOW_ERROR_TYPE_ITEM, item,
 412                                    "VLAN ID in TCI match is required");
 413                 return -rte_errno;
 414         }
 415
 416         if (efx_spec->efs_match_flags & EFX_FILTER_MATCH_ETHER_TYPE) {
 417                 rte_flow_error_set(error, EINVAL,
 418                                    RTE_FLOW_ERROR_TYPE_ITEM, item,
 419                                    "VLAN TPID matching is not supported");
 420                 return -rte_errno;
 421         }
 422         if (mask->inner_type == supp_mask.inner_type) {
 423                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_ETHER_TYPE;
 424                 efx_spec->efs_ether_type = rte_bswap16(spec->inner_type);
 425         } else if (mask->inner_type) {
 426                 rte_flow_error_set(error, EINVAL,
 427                                    RTE_FLOW_ERROR_TYPE_ITEM, item,
 428                                    "Bad mask for VLAN inner_type");
 429                 return -rte_errno;
 430         }
 431
 432         return 0;
 433 }
 434
 435 /**
 436  * Convert IPv4 item to EFX filter specification.
 437  *
 438  * @param item[in]
 439  *   Item specification. Only source and destination addresses and
 440  *   protocol fields are supported. If the mask is NULL, default
 441  *   mask will be used. Ranging is not supported.
 442  * @param efx_spec[in, out]
 443  *   EFX filter specification to update.
 444  * @param[out] error
 445  *   Perform verbose error reporting if not NULL.
 446  */
 447 static int
 448 sfc_flow_parse_ipv4(const struct rte_flow_item *item,
 449                     struct sfc_flow_parse_ctx *parse_ctx,
 450                     struct rte_flow_error *error)
 451 {
 452         int rc;
 453         efx_filter_spec_t *efx_spec = parse_ctx->filter;
 454         const struct rte_flow_item_ipv4 *spec = NULL;
 455         const struct rte_flow_item_ipv4 *mask = NULL;
 456         const uint16_t ether_type_ipv4 = rte_cpu_to_le_16(EFX_ETHER_TYPE_IPV4);
 457         const struct rte_flow_item_ipv4 supp_mask = {
 458                 .hdr = {
 459                         .src_addr = 0xffffffff,
 460                         .dst_addr = 0xffffffff,
 461                         .next_proto_id = 0xff,
 462                 }
 463         };
 464
 465         rc = sfc_flow_parse_init(item,
 466                                  (const void **)&spec,
 467                                  (const void **)&mask,
 468                                  &supp_mask,
 469                                  &rte_flow_item_ipv4_mask,
 470                                  sizeof(struct rte_flow_item_ipv4),
 471                                  error);
 472         if (rc != 0)
 473                 return rc;
 474
 475         /*
 476          * Filtering by IPv4 source and destination addresses requires
 477          * the appropriate ETHER_TYPE in hardware filters
 478          */
 479         if (!(efx_spec->efs_match_flags & EFX_FILTER_MATCH_ETHER_TYPE)) {
 480                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_ETHER_TYPE;
 481                 efx_spec->efs_ether_type = ether_type_ipv4;
 482         } else if (efx_spec->efs_ether_type != ether_type_ipv4) {
 483                 rte_flow_error_set(error, EINVAL,
 484                         RTE_FLOW_ERROR_TYPE_ITEM, item,
 485                         "Ethertype in pattern with IPV4 item should be appropriate");
 486                 return -rte_errno;
 487         }
 488
 489         if (spec == NULL)
 490                 return 0;
 491
 492         /*
 493          * IPv4 addresses are in big-endian byte order in item and in
 494          * efx_spec
 495          */
 496         if (mask->hdr.src_addr == supp_mask.hdr.src_addr) {
 497                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_REM_HOST;
 498                 efx_spec->efs_rem_host.eo_u32[0] = spec->hdr.src_addr;
 499         } else if (mask->hdr.src_addr != 0) {
 500                 goto fail_bad_mask;
 501         }
 502
 503         if (mask->hdr.dst_addr == supp_mask.hdr.dst_addr) {
 504                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_LOC_HOST;
 505                 efx_spec->efs_loc_host.eo_u32[0] = spec->hdr.dst_addr;
 506         } else if (mask->hdr.dst_addr != 0) {
 507                 goto fail_bad_mask;
 508         }
 509
 510         if (mask->hdr.next_proto_id == supp_mask.hdr.next_proto_id) {
 511                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_IP_PROTO;
 512                 efx_spec->efs_ip_proto = spec->hdr.next_proto_id;
 513         } else if (mask->hdr.next_proto_id != 0) {
 514                 goto fail_bad_mask;
 515         }
 516
 517         return 0;
 518
 519 fail_bad_mask:
 520         rte_flow_error_set(error, EINVAL,
 521                            RTE_FLOW_ERROR_TYPE_ITEM, item,
 522                            "Bad mask in the IPV4 pattern item");
 523         return -rte_errno;
 524 }
 525
 526 /**
 527  * Convert IPv6 item to EFX filter specification.
 528  *
 529  * @param item[in]
 530  *   Item specification. Only source and destination addresses and
 531  *   next header fields are supported. If the mask is NULL, default
 532  *   mask will be used. Ranging is not supported.
 533  * @param efx_spec[in, out]
 534  *   EFX filter specification to update.
 535  * @param[out] error
 536  *   Perform verbose error reporting if not NULL.
 537  */
 538 static int
 539 sfc_flow_parse_ipv6(const struct rte_flow_item *item,
 540                     struct sfc_flow_parse_ctx *parse_ctx,
 541                     struct rte_flow_error *error)
 542 {
 543         int rc;
 544         efx_filter_spec_t *efx_spec = parse_ctx->filter;
 545         const struct rte_flow_item_ipv6 *spec = NULL;
 546         const struct rte_flow_item_ipv6 *mask = NULL;
 547         const uint16_t ether_type_ipv6 = rte_cpu_to_le_16(EFX_ETHER_TYPE_IPV6);
 548         const struct rte_flow_item_ipv6 supp_mask = {
 549                 .hdr = {
 550                         .src_addr = { 0xff, 0xff, 0xff, 0xff,
 551                                       0xff, 0xff, 0xff, 0xff,
 552                                       0xff, 0xff, 0xff, 0xff,
 553                                       0xff, 0xff, 0xff, 0xff },
 554                         .dst_addr = { 0xff, 0xff, 0xff, 0xff,
 555                                       0xff, 0xff, 0xff, 0xff,
 556                                       0xff, 0xff, 0xff, 0xff,
 557                                       0xff, 0xff, 0xff, 0xff },
 558                         .proto = 0xff,
 559                 }
 560         };
 561
 562         rc = sfc_flow_parse_init(item,
 563                                  (const void **)&spec,
 564                                  (const void **)&mask,
 565                                  &supp_mask,
 566                                  &rte_flow_item_ipv6_mask,
 567                                  sizeof(struct rte_flow_item_ipv6),
 568                                  error);
 569         if (rc != 0)
 570                 return rc;
 571
 572         /*
 573          * Filtering by IPv6 source and destination addresses requires
 574          * the appropriate ETHER_TYPE in hardware filters
 575          */
 576         if (!(efx_spec->efs_match_flags & EFX_FILTER_MATCH_ETHER_TYPE)) {
 577                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_ETHER_TYPE;
 578                 efx_spec->efs_ether_type = ether_type_ipv6;
 579         } else if (efx_spec->efs_ether_type != ether_type_ipv6) {
 580                 rte_flow_error_set(error, EINVAL,
 581                         RTE_FLOW_ERROR_TYPE_ITEM, item,
 582                         "Ethertype in pattern with IPV6 item should be appropriate");
 583                 return -rte_errno;
 584         }
 585
 586         if (spec == NULL)
 587                 return 0;
 588
 589         /*
 590          * IPv6 addresses are in big-endian byte order in item and in
 591          * efx_spec
 592          */
 593         if (memcmp(mask->hdr.src_addr, supp_mask.hdr.src_addr,
 594                    sizeof(mask->hdr.src_addr)) == 0) {
 595                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_REM_HOST;
 596
 597                 RTE_BUILD_BUG_ON(sizeof(efx_spec->efs_rem_host) !=
 598                                  sizeof(spec->hdr.src_addr));
 599                 rte_memcpy(&efx_spec->efs_rem_host, spec->hdr.src_addr,
 600                            sizeof(efx_spec->efs_rem_host));
 601         } else if (!sfc_flow_is_zero(mask->hdr.src_addr,
 602                                      sizeof(mask->hdr.src_addr))) {
 603                 goto fail_bad_mask;
 604         }
 605
 606         if (memcmp(mask->hdr.dst_addr, supp_mask.hdr.dst_addr,
 607                    sizeof(mask->hdr.dst_addr)) == 0) {
 608                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_LOC_HOST;
 609
 610                 RTE_BUILD_BUG_ON(sizeof(efx_spec->efs_loc_host) !=
 611                                  sizeof(spec->hdr.dst_addr));
 612                 rte_memcpy(&efx_spec->efs_loc_host, spec->hdr.dst_addr,
 613                            sizeof(efx_spec->efs_loc_host));
 614         } else if (!sfc_flow_is_zero(mask->hdr.dst_addr,
 615                                      sizeof(mask->hdr.dst_addr))) {
 616                 goto fail_bad_mask;
 617         }
 618
 619         if (mask->hdr.proto == supp_mask.hdr.proto) {
 620                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_IP_PROTO;
 621                 efx_spec->efs_ip_proto = spec->hdr.proto;
 622         } else if (mask->hdr.proto != 0) {
 623                 goto fail_bad_mask;
 624         }
 625
 626         return 0;
 627
 628 fail_bad_mask:
 629         rte_flow_error_set(error, EINVAL,
 630                            RTE_FLOW_ERROR_TYPE_ITEM, item,
 631                            "Bad mask in the IPV6 pattern item");
 632         return -rte_errno;
 633 }
 634
 635 /**
 636  * Convert TCP item to EFX filter specification.
 637  *
 638  * @param item[in]
 639  *   Item specification. Only source and destination ports fields
 640  *   are supported. If the mask is NULL, default mask will be used.
 641  *   Ranging is not supported.
 642  * @param efx_spec[in, out]
 643  *   EFX filter specification to update.
 644  * @param[out] error
 645  *   Perform verbose error reporting if not NULL.
 646  */
 647 static int
 648 sfc_flow_parse_tcp(const struct rte_flow_item *item,
 649                    struct sfc_flow_parse_ctx *parse_ctx,
 650                    struct rte_flow_error *error)
 651 {
 652         int rc;
 653         efx_filter_spec_t *efx_spec = parse_ctx->filter;
 654         const struct rte_flow_item_tcp *spec = NULL;
 655         const struct rte_flow_item_tcp *mask = NULL;
 656         const struct rte_flow_item_tcp supp_mask = {
 657                 .hdr = {
 658                         .src_port = 0xffff,
 659                         .dst_port = 0xffff,
 660                 }
 661         };
 662
 663         rc = sfc_flow_parse_init(item,
 664                                  (const void **)&spec,
 665                                  (const void **)&mask,
 666                                  &supp_mask,
 667                                  &rte_flow_item_tcp_mask,
 668                                  sizeof(struct rte_flow_item_tcp),
 669                                  error);
 670         if (rc != 0)
 671                 return rc;
 672
 673         /*
 674          * Filtering by TCP source and destination ports requires
 675          * the appropriate IP_PROTO in hardware filters
 676          */
 677         if (!(efx_spec->efs_match_flags & EFX_FILTER_MATCH_IP_PROTO)) {
 678                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_IP_PROTO;
 679                 efx_spec->efs_ip_proto = EFX_IPPROTO_TCP;
 680         } else if (efx_spec->efs_ip_proto != EFX_IPPROTO_TCP) {
 681                 rte_flow_error_set(error, EINVAL,
 682                         RTE_FLOW_ERROR_TYPE_ITEM, item,
 683                         "IP proto in pattern with TCP item should be appropriate");
 684                 return -rte_errno;
 685         }
 686
 687         if (spec == NULL)
 688                 return 0;
 689
 690         /*
 691          * Source and destination ports are in big-endian byte order in item and
 692          * in little-endian in efx_spec, so byte swap is used
 693          */
 694         if (mask->hdr.src_port == supp_mask.hdr.src_port) {
 695                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_REM_PORT;
 696                 efx_spec->efs_rem_port = rte_bswap16(spec->hdr.src_port);
 697         } else if (mask->hdr.src_port != 0) {
 698                 goto fail_bad_mask;
 699         }
 700
 701         if (mask->hdr.dst_port == supp_mask.hdr.dst_port) {
 702                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_LOC_PORT;
 703                 efx_spec->efs_loc_port = rte_bswap16(spec->hdr.dst_port);
 704         } else if (mask->hdr.dst_port != 0) {
 705                 goto fail_bad_mask;
 706         }
 707
 708         return 0;
 709
 710 fail_bad_mask:
 711         rte_flow_error_set(error, EINVAL,
 712                            RTE_FLOW_ERROR_TYPE_ITEM, item,
 713                            "Bad mask in the TCP pattern item");
 714         return -rte_errno;
 715 }
 716
 717 /**
 718  * Convert UDP item to EFX filter specification.
 719  *
 720  * @param item[in]
 721  *   Item specification. Only source and destination ports fields
 722  *   are supported. If the mask is NULL, default mask will be used.
 723  *   Ranging is not supported.
 724  * @param efx_spec[in, out]
 725  *   EFX filter specification to update.
 726  * @param[out] error
 727  *   Perform verbose error reporting if not NULL.
 728  */
 729 static int
 730 sfc_flow_parse_udp(const struct rte_flow_item *item,
 731                    struct sfc_flow_parse_ctx *parse_ctx,
 732                    struct rte_flow_error *error)
 733 {
 734         int rc;
 735         efx_filter_spec_t *efx_spec = parse_ctx->filter;
 736         const struct rte_flow_item_udp *spec = NULL;
 737         const struct rte_flow_item_udp *mask = NULL;
 738         const struct rte_flow_item_udp supp_mask = {
 739                 .hdr = {
 740                         .src_port = 0xffff,
 741                         .dst_port = 0xffff,
 742                 }
 743         };
 744
 745         rc = sfc_flow_parse_init(item,
 746                                  (const void **)&spec,
 747                                  (const void **)&mask,
 748                                  &supp_mask,
 749                                  &rte_flow_item_udp_mask,
 750                                  sizeof(struct rte_flow_item_udp),
 751                                  error);
 752         if (rc != 0)
 753                 return rc;
 754
 755         /*
 756          * Filtering by UDP source and destination ports requires
 757          * the appropriate IP_PROTO in hardware filters
 758          */
 759         if (!(efx_spec->efs_match_flags & EFX_FILTER_MATCH_IP_PROTO)) {
 760                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_IP_PROTO;
 761                 efx_spec->efs_ip_proto = EFX_IPPROTO_UDP;
 762         } else if (efx_spec->efs_ip_proto != EFX_IPPROTO_UDP) {
 763                 rte_flow_error_set(error, EINVAL,
 764                         RTE_FLOW_ERROR_TYPE_ITEM, item,
 765                         "IP proto in pattern with UDP item should be appropriate");
 766                 return -rte_errno;
 767         }
 768
 769         if (spec == NULL)
 770                 return 0;
 771
 772         /*
 773          * Source and destination ports are in big-endian byte order in item and
 774          * in little-endian in efx_spec, so byte swap is used
 775          */
 776         if (mask->hdr.src_port == supp_mask.hdr.src_port) {
 777                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_REM_PORT;
 778                 efx_spec->efs_rem_port = rte_bswap16(spec->hdr.src_port);
 779         } else if (mask->hdr.src_port != 0) {
 780                 goto fail_bad_mask;
 781         }
 782
 783         if (mask->hdr.dst_port == supp_mask.hdr.dst_port) {
 784                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_LOC_PORT;
 785                 efx_spec->efs_loc_port = rte_bswap16(spec->hdr.dst_port);
 786         } else if (mask->hdr.dst_port != 0) {
 787                 goto fail_bad_mask;
 788         }
 789
 790         return 0;
 791
 792 fail_bad_mask:
 793         rte_flow_error_set(error, EINVAL,
 794                            RTE_FLOW_ERROR_TYPE_ITEM, item,
 795                            "Bad mask in the UDP pattern item");
 796         return -rte_errno;
 797 }
 798
 799 /*
 800  * Filters for encapsulated packets match based on the EtherType and IP
 801  * protocol in the outer frame.
 802  */
 803 static int
 804 sfc_flow_set_match_flags_for_encap_pkts(const struct rte_flow_item *item,
 805                                         efx_filter_spec_t *efx_spec,
 806                                         uint8_t ip_proto,
 807                                         struct rte_flow_error *error)
 808 {
 809         if (!(efx_spec->efs_match_flags & EFX_FILTER_MATCH_IP_PROTO)) {
 810                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_IP_PROTO;
 811                 efx_spec->efs_ip_proto = ip_proto;
 812         } else if (efx_spec->efs_ip_proto != ip_proto) {
 813                 switch (ip_proto) {
 814                 case EFX_IPPROTO_UDP:
 815                         rte_flow_error_set(error, EINVAL,
 816                                 RTE_FLOW_ERROR_TYPE_ITEM, item,
 817                                 "Outer IP header protocol must be UDP "
 818                                 "in VxLAN/GENEVE pattern");
 819                         return -rte_errno;
 820
 821                 case EFX_IPPROTO_GRE:
 822                         rte_flow_error_set(error, EINVAL,
 823                                 RTE_FLOW_ERROR_TYPE_ITEM, item,
 824                                 "Outer IP header protocol must be GRE "
 825                                 "in NVGRE pattern");
 826                         return -rte_errno;
 827
 828                 default:
 829                         rte_flow_error_set(error, EINVAL,
 830                                 RTE_FLOW_ERROR_TYPE_ITEM, item,
 831                                 "Only VxLAN/GENEVE/NVGRE tunneling patterns "
 832                                 "are supported");
 833                         return -rte_errno;
 834                 }
 835         }
 836
 837         if (efx_spec->efs_match_flags & EFX_FILTER_MATCH_ETHER_TYPE &&
 838             efx_spec->efs_ether_type != EFX_ETHER_TYPE_IPV4 &&
 839             efx_spec->efs_ether_type != EFX_ETHER_TYPE_IPV6) {
 840                 rte_flow_error_set(error, EINVAL,
 841                         RTE_FLOW_ERROR_TYPE_ITEM, item,
 842                         "Outer frame EtherType in pattern with tunneling "
 843                         "must be IPv4 or IPv6");
 844                 return -rte_errno;
 845         }
 846
 847         return 0;
 848 }
 849
 850 static int
 851 sfc_flow_set_efx_spec_vni_or_vsid(efx_filter_spec_t *efx_spec,
 852                                   const uint8_t *vni_or_vsid_val,
 853                                   const uint8_t *vni_or_vsid_mask,
 854                                   const struct rte_flow_item *item,
 855                                   struct rte_flow_error *error)
 856 {
 857         const uint8_t vni_or_vsid_full_mask[EFX_VNI_OR_VSID_LEN] = {
 858                 0xff, 0xff, 0xff
 859         };
 860
 861         if (memcmp(vni_or_vsid_mask, vni_or_vsid_full_mask,
 862                    EFX_VNI_OR_VSID_LEN) == 0) {
 863                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_VNI_OR_VSID;
 864                 rte_memcpy(efx_spec->efs_vni_or_vsid, vni_or_vsid_val,
 865                            EFX_VNI_OR_VSID_LEN);
 866         } else if (!sfc_flow_is_zero(vni_or_vsid_mask, EFX_VNI_OR_VSID_LEN)) {
 867                 rte_flow_error_set(error, EINVAL,
 868                                    RTE_FLOW_ERROR_TYPE_ITEM, item,
 869                                    "Unsupported VNI/VSID mask");
 870                 return -rte_errno;
 871         }
 872
 873         return 0;
 874 }
 875
 876 /**
 877  * Convert VXLAN item to EFX filter specification.
 878  *
 879  * @param item[in]
 880  *   Item specification. Only VXLAN network identifier field is supported.
 881  *   If the mask is NULL, default mask will be used.
 882  *   Ranging is not supported.
 883  * @param efx_spec[in, out]
 884  *   EFX filter specification to update.
 885  * @param[out] error
 886  *   Perform verbose error reporting if not NULL.
 887  */
 888 static int
 889 sfc_flow_parse_vxlan(const struct rte_flow_item *item,
 890                      struct sfc_flow_parse_ctx *parse_ctx,
 891                      struct rte_flow_error *error)
 892 {
 893         int rc;
 894         efx_filter_spec_t *efx_spec = parse_ctx->filter;
 895         const struct rte_flow_item_vxlan *spec = NULL;
 896         const struct rte_flow_item_vxlan *mask = NULL;
 897         const struct rte_flow_item_vxlan supp_mask = {
 898                 .vni = { 0xff, 0xff, 0xff }
 899         };
 900
 901         rc = sfc_flow_parse_init(item,
 902                                  (const void **)&spec,
 903                                  (const void **)&mask,
 904                                  &supp_mask,
 905                                  &rte_flow_item_vxlan_mask,
 906                                  sizeof(struct rte_flow_item_vxlan),
 907                                  error);
 908         if (rc != 0)
 909                 return rc;
 910
 911         rc = sfc_flow_set_match_flags_for_encap_pkts(item, efx_spec,
 912                                                      EFX_IPPROTO_UDP, error);
 913         if (rc != 0)
 914                 return rc;
 915
 916         efx_spec->efs_encap_type = EFX_TUNNEL_PROTOCOL_VXLAN;
 917         efx_spec->efs_match_flags |= EFX_FILTER_MATCH_ENCAP_TYPE;
 918
 919         if (spec == NULL)
 920                 return 0;
 921
 922         rc = sfc_flow_set_efx_spec_vni_or_vsid(efx_spec, spec->vni,
 923                                                mask->vni, item, error);
 924
 925         return rc;
 926 }
 927
 928 /**
 929  * Convert GENEVE item to EFX filter specification.
 930  *
 931  * @param item[in]
 932  *   Item specification. Only Virtual Network Identifier and protocol type
 933  *   fields are supported. But protocol type can be only Ethernet (0x6558).
 934  *   If the mask is NULL, default mask will be used.
 935  *   Ranging is not supported.
 936  * @param efx_spec[in, out]
 937  *   EFX filter specification to update.
 938  * @param[out] error
 939  *   Perform verbose error reporting if not NULL.
 940  */
 941 static int
 942 sfc_flow_parse_geneve(const struct rte_flow_item *item,
 943                       struct sfc_flow_parse_ctx *parse_ctx,
 944                       struct rte_flow_error *error)
 945 {
 946         int rc;
 947         efx_filter_spec_t *efx_spec = parse_ctx->filter;
 948         const struct rte_flow_item_geneve *spec = NULL;
 949         const struct rte_flow_item_geneve *mask = NULL;
 950         const struct rte_flow_item_geneve supp_mask = {
 951                 .protocol = RTE_BE16(0xffff),
 952                 .vni = { 0xff, 0xff, 0xff }
 953         };
 954
 955         rc = sfc_flow_parse_init(item,
 956                                  (const void **)&spec,
 957                                  (const void **)&mask,
 958                                  &supp_mask,
 959                                  &rte_flow_item_geneve_mask,
 960                                  sizeof(struct rte_flow_item_geneve),
 961                                  error);
 962         if (rc != 0)
 963                 return rc;
 964
 965         rc = sfc_flow_set_match_flags_for_encap_pkts(item, efx_spec,
 966                                                      EFX_IPPROTO_UDP, error);
 967         if (rc != 0)
 968                 return rc;
 969
 970         efx_spec->efs_encap_type = EFX_TUNNEL_PROTOCOL_GENEVE;
 971         efx_spec->efs_match_flags |= EFX_FILTER_MATCH_ENCAP_TYPE;
 972
 973         if (spec == NULL)
 974                 return 0;
 975
 976         if (mask->protocol == supp_mask.protocol) {
 977                 if (spec->protocol != rte_cpu_to_be_16(RTE_ETHER_TYPE_TEB)) {
 978                         rte_flow_error_set(error, EINVAL,
 979                                 RTE_FLOW_ERROR_TYPE_ITEM, item,
 980                                 "GENEVE encap. protocol must be Ethernet "
 981                                 "(0x6558) in the GENEVE pattern item");
 982                         return -rte_errno;
 983                 }
 984         } else if (mask->protocol != 0) {
 985                 rte_flow_error_set(error, EINVAL,
 986                         RTE_FLOW_ERROR_TYPE_ITEM, item,
 987                         "Unsupported mask for GENEVE encap. protocol");
 988                 return -rte_errno;
 989         }
 990
 991         rc = sfc_flow_set_efx_spec_vni_or_vsid(efx_spec, spec->vni,
 992                                                mask->vni, item, error);
 993
 994         return rc;
 995 }
 996
 997 /**
 998  * Convert NVGRE item to EFX filter specification.
 999  *
1000  * @param item[in]
1001  *   Item specification. Only virtual subnet ID field is supported.
1002  *   If the mask is NULL, default mask will be used.
1003  *   Ranging is not supported.
1004  * @param efx_spec[in, out]
1005  *   EFX filter specification to update.
1006  * @param[out] error
1007  *   Perform verbose error reporting if not NULL.
1008  */
1009 static int
1010 sfc_flow_parse_nvgre(const struct rte_flow_item *item,
1011                      struct sfc_flow_parse_ctx *parse_ctx,
1012                      struct rte_flow_error *error)
1013 {
1014         int rc;
1015         efx_filter_spec_t *efx_spec = parse_ctx->filter;
1016         const struct rte_flow_item_nvgre *spec = NULL;
1017         const struct rte_flow_item_nvgre *mask = NULL;
1018         const struct rte_flow_item_nvgre supp_mask = {
1019                 .tni = { 0xff, 0xff, 0xff }
1020         };
1021
1022         rc = sfc_flow_parse_init(item,
1023                                  (const void **)&spec,
1024                                  (const void **)&mask,
1025                                  &supp_mask,
1026                                  &rte_flow_item_nvgre_mask,
1027                                  sizeof(struct rte_flow_item_nvgre),
1028                                  error);
1029         if (rc != 0)
1030                 return rc;
1031
1032         rc = sfc_flow_set_match_flags_for_encap_pkts(item, efx_spec,
1033                                                      EFX_IPPROTO_GRE, error);
1034         if (rc != 0)
1035                 return rc;
1036
1037         efx_spec->efs_encap_type = EFX_TUNNEL_PROTOCOL_NVGRE;
1038         efx_spec->efs_match_flags |= EFX_FILTER_MATCH_ENCAP_TYPE;
1039
1040         if (spec == NULL)
1041                 return 0;
1042
1043         rc = sfc_flow_set_efx_spec_vni_or_vsid(efx_spec, spec->tni,
1044                                                mask->tni, item, error);
1045
1046         return rc;
1047 }
1048
1049 static const struct sfc_flow_item sfc_flow_items[] = {
1050         {
1051                 .type = RTE_FLOW_ITEM_TYPE_VOID,
1052                 .prev_layer = SFC_FLOW_ITEM_ANY_LAYER,
1053                 .layer = SFC_FLOW_ITEM_ANY_LAYER,
1054                 .ctx_type = SFC_FLOW_PARSE_CTX_FILTER,
1055                 .parse = sfc_flow_parse_void,
1056         },
1057         {
1058                 .type = RTE_FLOW_ITEM_TYPE_ETH,
1059                 .prev_layer = SFC_FLOW_ITEM_START_LAYER,
1060                 .layer = SFC_FLOW_ITEM_L2,
1061                 .ctx_type = SFC_FLOW_PARSE_CTX_FILTER,
1062                 .parse = sfc_flow_parse_eth,
1063         },
1064         {
1065                 .type = RTE_FLOW_ITEM_TYPE_VLAN,
1066                 .prev_layer = SFC_FLOW_ITEM_L2,
1067                 .layer = SFC_FLOW_ITEM_L2,
1068                 .ctx_type = SFC_FLOW_PARSE_CTX_FILTER,
1069                 .parse = sfc_flow_parse_vlan,
1070         },
1071         {
1072                 .type = RTE_FLOW_ITEM_TYPE_IPV4,
1073                 .prev_layer = SFC_FLOW_ITEM_L2,
1074                 .layer = SFC_FLOW_ITEM_L3,
1075                 .ctx_type = SFC_FLOW_PARSE_CTX_FILTER,
1076                 .parse = sfc_flow_parse_ipv4,
1077         },
1078         {
1079                 .type = RTE_FLOW_ITEM_TYPE_IPV6,
1080                 .prev_layer = SFC_FLOW_ITEM_L2,
1081                 .layer = SFC_FLOW_ITEM_L3,
1082                 .ctx_type = SFC_FLOW_PARSE_CTX_FILTER,
1083                 .parse = sfc_flow_parse_ipv6,
1084         },
1085         {
1086                 .type = RTE_FLOW_ITEM_TYPE_TCP,
1087                 .prev_layer = SFC_FLOW_ITEM_L3,
1088                 .layer = SFC_FLOW_ITEM_L4,
1089                 .ctx_type = SFC_FLOW_PARSE_CTX_FILTER,
1090                 .parse = sfc_flow_parse_tcp,
1091         },
1092         {
1093                 .type = RTE_FLOW_ITEM_TYPE_UDP,
1094                 .prev_layer = SFC_FLOW_ITEM_L3,
1095                 .layer = SFC_FLOW_ITEM_L4,
1096                 .ctx_type = SFC_FLOW_PARSE_CTX_FILTER,
1097                 .parse = sfc_flow_parse_udp,
1098         },
1099         {
1100                 .type = RTE_FLOW_ITEM_TYPE_VXLAN,
1101                 .prev_layer = SFC_FLOW_ITEM_L4,
1102                 .layer = SFC_FLOW_ITEM_START_LAYER,
1103                 .ctx_type = SFC_FLOW_PARSE_CTX_FILTER,
1104                 .parse = sfc_flow_parse_vxlan,
1105         },
1106         {
1107                 .type = RTE_FLOW_ITEM_TYPE_GENEVE,
1108                 .prev_layer = SFC_FLOW_ITEM_L4,
1109                 .layer = SFC_FLOW_ITEM_START_LAYER,
1110                 .ctx_type = SFC_FLOW_PARSE_CTX_FILTER,
1111                 .parse = sfc_flow_parse_geneve,
1112         },
1113         {
1114                 .type = RTE_FLOW_ITEM_TYPE_NVGRE,
1115                 .prev_layer = SFC_FLOW_ITEM_L3,
1116                 .layer = SFC_FLOW_ITEM_START_LAYER,
1117                 .ctx_type = SFC_FLOW_PARSE_CTX_FILTER,
1118                 .parse = sfc_flow_parse_nvgre,
1119         },
1120 };
1121
1122 /*
1123  * Protocol-independent flow API support
1124  */
1125 static int
1126 sfc_flow_parse_attr(const struct rte_flow_attr *attr,
1127                     struct rte_flow *flow,
1128                     struct rte_flow_error *error)
1129 {
1130         struct sfc_flow_spec *spec = &flow->spec;
1131         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
1132
1133         if (attr == NULL) {
1134                 rte_flow_error_set(error, EINVAL,
1135                                    RTE_FLOW_ERROR_TYPE_ATTR, NULL,
1136                                    "NULL attribute");
1137                 return -rte_errno;
1138         }
1139         if (attr->group != 0) {
1140                 rte_flow_error_set(error, ENOTSUP,
1141                                    RTE_FLOW_ERROR_TYPE_ATTR_GROUP, attr,
1142                                    "Groups are not supported");
1143                 return -rte_errno;
1144         }
1145         if (attr->egress != 0) {
1146                 rte_flow_error_set(error, ENOTSUP,
1147                                    RTE_FLOW_ERROR_TYPE_ATTR_EGRESS, attr,
1148                                    "Egress is not supported");
1149                 return -rte_errno;
1150         }
1151         if (attr->ingress == 0) {
1152                 rte_flow_error_set(error, ENOTSUP,
1153                                    RTE_FLOW_ERROR_TYPE_ATTR_INGRESS, attr,
1154                                    "Ingress is compulsory");
1155                 return -rte_errno;
1156         }
1157         if (attr->transfer == 0) {
1158                 if (attr->priority != 0) {
1159                         rte_flow_error_set(error, ENOTSUP,
1160                                            RTE_FLOW_ERROR_TYPE_ATTR_PRIORITY,
1161                                            attr, "Priorities are unsupported");
1162                         return -rte_errno;
1163                 }
1164                 spec->type = SFC_FLOW_SPEC_FILTER;
1165                 spec_filter->template.efs_flags |= EFX_FILTER_FLAG_RX;
1166                 spec_filter->template.efs_rss_context = EFX_RSS_CONTEXT_DEFAULT;
1167         } else {
1168                 rte_flow_error_set(error, ENOTSUP,
1169                                    RTE_FLOW_ERROR_TYPE_ATTR_TRANSFER, attr,
1170                                    "Transfer is not supported");
1171                 return -rte_errno;
1172         }
1173
1174         return 0;
1175 }
1176
1177 /* Get item from array sfc_flow_items */
1178 static const struct sfc_flow_item *
1179 sfc_flow_get_item(const struct sfc_flow_item *items,
1180                   unsigned int nb_items,
1181                   enum rte_flow_item_type type)
1182 {
1183         unsigned int i;
1184
1185         for (i = 0; i < nb_items; i++)
1186                 if (items[i].type == type)
1187                         return &items[i];
1188
1189         return NULL;
1190 }
1191
1192 int
1193 sfc_flow_parse_pattern(const struct sfc_flow_item *flow_items,
1194                        unsigned int nb_flow_items,
1195                        const struct rte_flow_item pattern[],
1196                        struct sfc_flow_parse_ctx *parse_ctx,
1197                        struct rte_flow_error *error)
1198 {
1199         int rc;
1200         unsigned int prev_layer = SFC_FLOW_ITEM_ANY_LAYER;
1201         boolean_t is_ifrm = B_FALSE;
1202         const struct sfc_flow_item *item;
1203
1204         if (pattern == NULL) {
1205                 rte_flow_error_set(error, EINVAL,
1206                                    RTE_FLOW_ERROR_TYPE_ITEM_NUM, NULL,
1207                                    "NULL pattern");
1208                 return -rte_errno;
1209         }
1210
1211         for (; pattern->type != RTE_FLOW_ITEM_TYPE_END; pattern++) {
1212                 item = sfc_flow_get_item(flow_items, nb_flow_items,
1213                                          pattern->type);
1214                 if (item == NULL) {
1215                         rte_flow_error_set(error, ENOTSUP,
1216                                            RTE_FLOW_ERROR_TYPE_ITEM, pattern,
1217                                            "Unsupported pattern item");
1218                         return -rte_errno;
1219                 }
1220
1221                 /*
1222                  * Omitting one or several protocol layers at the beginning
1223                  * of pattern is supported
1224                  */
1225                 if (item->prev_layer != SFC_FLOW_ITEM_ANY_LAYER &&
1226                     prev_layer != SFC_FLOW_ITEM_ANY_LAYER &&
1227                     item->prev_layer != prev_layer) {
1228                         rte_flow_error_set(error, ENOTSUP,
1229                                            RTE_FLOW_ERROR_TYPE_ITEM, pattern,
1230                                            "Unexpected sequence of pattern items");
1231                         return -rte_errno;
1232                 }
1233
1234                 /*
1235                  * Allow only VOID and ETH pattern items in the inner frame.
1236                  * Also check that there is only one tunneling protocol.
1237                  */
1238                 switch (item->type) {
1239                 case RTE_FLOW_ITEM_TYPE_VOID:
1240                 case RTE_FLOW_ITEM_TYPE_ETH:
1241                         break;
1242
1243                 case RTE_FLOW_ITEM_TYPE_VXLAN:
1244                 case RTE_FLOW_ITEM_TYPE_GENEVE:
1245                 case RTE_FLOW_ITEM_TYPE_NVGRE:
1246                         if (is_ifrm) {
1247                                 rte_flow_error_set(error, EINVAL,
1248                                         RTE_FLOW_ERROR_TYPE_ITEM,
1249                                         pattern,
1250                                         "More than one tunneling protocol");
1251                                 return -rte_errno;
1252                         }
1253                         is_ifrm = B_TRUE;
1254                         break;
1255
1256                 default:
1257                         if (is_ifrm) {
1258                                 rte_flow_error_set(error, EINVAL,
1259                                         RTE_FLOW_ERROR_TYPE_ITEM,
1260                                         pattern,
1261                                         "There is an unsupported pattern item "
1262                                         "in the inner frame");
1263                                 return -rte_errno;
1264                         }
1265                         break;
1266                 }
1267
1268                 if (parse_ctx->type != item->ctx_type) {
1269                         rte_flow_error_set(error, EINVAL,
1270                                         RTE_FLOW_ERROR_TYPE_ITEM, pattern,
1271                                         "Parse context type mismatch");
1272                         return -rte_errno;
1273                 }
1274
1275                 rc = item->parse(pattern, parse_ctx, error);
1276                 if (rc != 0)
1277                         return rc;
1278
1279                 if (item->layer != SFC_FLOW_ITEM_ANY_LAYER)
1280                         prev_layer = item->layer;
1281         }
1282
1283         return 0;
1284 }
1285
1286 static int
1287 sfc_flow_parse_queue(struct sfc_adapter *sa,
1288                      const struct rte_flow_action_queue *queue,
1289                      struct rte_flow *flow)
1290 {
1291         struct sfc_flow_spec *spec = &flow->spec;
1292         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
1293         struct sfc_rxq *rxq;
1294
1295         if (queue->index >= sfc_sa2shared(sa)->rxq_count)
1296                 return -EINVAL;
1297
1298         rxq = &sa->rxq_ctrl[queue->index];
1299         spec_filter->template.efs_dmaq_id = (uint16_t)rxq->hw_index;
1300
1301         return 0;
1302 }
1303
1304 static int
1305 sfc_flow_parse_rss(struct sfc_adapter *sa,
1306                    const struct rte_flow_action_rss *action_rss,
1307                    struct rte_flow *flow)
1308 {
1309         struct sfc_adapter_shared * const sas = sfc_sa2shared(sa);
1310         struct sfc_rss *rss = &sas->rss;
1311         unsigned int rxq_sw_index;
1312         struct sfc_rxq *rxq;
1313         unsigned int rxq_hw_index_min;
1314         unsigned int rxq_hw_index_max;
1315         efx_rx_hash_type_t efx_hash_types;
1316         const uint8_t *rss_key;
1317         struct sfc_flow_spec *spec = &flow->spec;
1318         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
1319         struct sfc_flow_rss *sfc_rss_conf = &spec_filter->rss_conf;
1320         unsigned int i;
1321
1322         if (action_rss->queue_num == 0)
1323                 return -EINVAL;
1324
1325         rxq_sw_index = sfc_sa2shared(sa)->rxq_count - 1;
1326         rxq = &sa->rxq_ctrl[rxq_sw_index];
1327         rxq_hw_index_min = rxq->hw_index;
1328         rxq_hw_index_max = 0;
1329
1330         for (i = 0; i < action_rss->queue_num; ++i) {
1331                 rxq_sw_index = action_rss->queue[i];
1332
1333                 if (rxq_sw_index >= sfc_sa2shared(sa)->rxq_count)
1334                         return -EINVAL;
1335
1336                 rxq = &sa->rxq_ctrl[rxq_sw_index];
1337
1338                 if (rxq->hw_index < rxq_hw_index_min)
1339                         rxq_hw_index_min = rxq->hw_index;
1340
1341                 if (rxq->hw_index > rxq_hw_index_max)
1342                         rxq_hw_index_max = rxq->hw_index;
1343         }
1344
1345         switch (action_rss->func) {
1346         case RTE_ETH_HASH_FUNCTION_DEFAULT:
1347         case RTE_ETH_HASH_FUNCTION_TOEPLITZ:
1348                 break;
1349         default:
1350                 return -EINVAL;
1351         }
1352
1353         if (action_rss->level)
1354                 return -EINVAL;
1355
1356         /*
1357          * Dummy RSS action with only one queue and no specific settings
1358          * for hash types and key does not require dedicated RSS context
1359          * and may be simplified to single queue action.
1360          */
1361         if (action_rss->queue_num == 1 && action_rss->types == 0 &&
1362             action_rss->key_len == 0) {
1363                 spec_filter->template.efs_dmaq_id = rxq_hw_index_min;
1364                 return 0;
1365         }
1366
1367         if (action_rss->types) {
1368                 int rc;
1369
1370                 rc = sfc_rx_hf_rte_to_efx(sa, action_rss->types,
1371                                           &efx_hash_types);
1372                 if (rc != 0)
1373                         return -rc;
1374         } else {
1375                 unsigned int i;
1376
1377                 efx_hash_types = 0;
1378                 for (i = 0; i < rss->hf_map_nb_entries; ++i)
1379                         efx_hash_types |= rss->hf_map[i].efx;
1380         }
1381
1382         if (action_rss->key_len) {
1383                 if (action_rss->key_len != sizeof(rss->key))
1384                         return -EINVAL;
1385
1386                 rss_key = action_rss->key;
1387         } else {
1388                 rss_key = rss->key;
1389         }
1390
1391         spec_filter->rss = B_TRUE;
1392
1393         sfc_rss_conf->rxq_hw_index_min = rxq_hw_index_min;
1394         sfc_rss_conf->rxq_hw_index_max = rxq_hw_index_max;
1395         sfc_rss_conf->rss_hash_types = efx_hash_types;
1396         rte_memcpy(sfc_rss_conf->rss_key, rss_key, sizeof(rss->key));
1397
1398         for (i = 0; i < RTE_DIM(sfc_rss_conf->rss_tbl); ++i) {
1399                 unsigned int nb_queues = action_rss->queue_num;
1400                 unsigned int rxq_sw_index = action_rss->queue[i % nb_queues];
1401                 struct sfc_rxq *rxq = &sa->rxq_ctrl[rxq_sw_index];
1402
1403                 sfc_rss_conf->rss_tbl[i] = rxq->hw_index - rxq_hw_index_min;
1404         }
1405
1406         return 0;
1407 }
1408
1409 static int
1410 sfc_flow_spec_flush(struct sfc_adapter *sa, struct sfc_flow_spec *spec,
1411                     unsigned int filters_count)
1412 {
1413         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
1414         unsigned int i;
1415         int ret = 0;
1416
1417         for (i = 0; i < filters_count; i++) {
1418                 int rc;
1419
1420                 rc = efx_filter_remove(sa->nic, &spec_filter->filters[i]);
1421                 if (ret == 0 && rc != 0) {
1422                         sfc_err(sa, "failed to remove filter specification "
1423                                 "(rc = %d)", rc);
1424                         ret = rc;
1425                 }
1426         }
1427
1428         return ret;
1429 }
1430
1431 static int
1432 sfc_flow_spec_insert(struct sfc_adapter *sa, struct sfc_flow_spec *spec)
1433 {
1434         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
1435         unsigned int i;
1436         int rc = 0;
1437
1438         for (i = 0; i < spec_filter->count; i++) {
1439                 rc = efx_filter_insert(sa->nic, &spec_filter->filters[i]);
1440                 if (rc != 0) {
1441                         sfc_flow_spec_flush(sa, spec, i);
1442                         break;
1443                 }
1444         }
1445
1446         return rc;
1447 }
1448
1449 static int
1450 sfc_flow_spec_remove(struct sfc_adapter *sa, struct sfc_flow_spec *spec)
1451 {
1452         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
1453
1454         return sfc_flow_spec_flush(sa, spec, spec_filter->count);
1455 }
1456
1457 static int
1458 sfc_flow_filter_insert(struct sfc_adapter *sa,
1459                        struct rte_flow *flow)
1460 {
1461         struct sfc_adapter_shared * const sas = sfc_sa2shared(sa);
1462         struct sfc_rss *rss = &sas->rss;
1463         struct sfc_flow_spec_filter *spec_filter = &flow->spec.filter;
1464         struct sfc_flow_rss *flow_rss = &spec_filter->rss_conf;
1465         uint32_t efs_rss_context = EFX_RSS_CONTEXT_DEFAULT;
1466         unsigned int i;
1467         int rc = 0;
1468
1469         if (spec_filter->rss) {
1470                 unsigned int rss_spread = MIN(flow_rss->rxq_hw_index_max -
1471                                               flow_rss->rxq_hw_index_min + 1,
1472                                               EFX_MAXRSS);
1473
1474                 rc = efx_rx_scale_context_alloc(sa->nic,
1475                                                 EFX_RX_SCALE_EXCLUSIVE,
1476                                                 rss_spread,
1477                                                 &efs_rss_context);
1478                 if (rc != 0)
1479                         goto fail_scale_context_alloc;
1480
1481                 rc = efx_rx_scale_mode_set(sa->nic, efs_rss_context,
1482                                            rss->hash_alg,
1483                                            flow_rss->rss_hash_types, B_TRUE);
1484                 if (rc != 0)
1485                         goto fail_scale_mode_set;
1486
1487                 rc = efx_rx_scale_key_set(sa->nic, efs_rss_context,
1488                                           flow_rss->rss_key,
1489                                           sizeof(rss->key));
1490                 if (rc != 0)
1491                         goto fail_scale_key_set;
1492
1493                 /*
1494                  * At this point, fully elaborated filter specifications
1495                  * have been produced from the template. To make sure that
1496                  * RSS behaviour is consistent between them, set the same
1497                  * RSS context value everywhere.
1498                  */
1499                 for (i = 0; i < spec_filter->count; i++) {
1500                         efx_filter_spec_t *spec = &spec_filter->filters[i];
1501
1502                         spec->efs_rss_context = efs_rss_context;
1503                         spec->efs_dmaq_id = flow_rss->rxq_hw_index_min;
1504                         spec->efs_flags |= EFX_FILTER_FLAG_RX_RSS;
1505                 }
1506         }
1507
1508         rc = sfc_flow_spec_insert(sa, &flow->spec);
1509         if (rc != 0)
1510                 goto fail_filter_insert;
1511
1512         if (spec_filter->rss) {
1513                 /*
1514                  * Scale table is set after filter insertion because
1515                  * the table entries are relative to the base RxQ ID
1516                  * and the latter is submitted to the HW by means of
1517                  * inserting a filter, so by the time of the request
1518                  * the HW knows all the information needed to verify
1519                  * the table entries, and the operation will succeed
1520                  */
1521                 rc = efx_rx_scale_tbl_set(sa->nic, efs_rss_context,
1522                                           flow_rss->rss_tbl,
1523                                           RTE_DIM(flow_rss->rss_tbl));
1524                 if (rc != 0)
1525                         goto fail_scale_tbl_set;
1526         }
1527
1528         return 0;
1529
1530 fail_scale_tbl_set:
1531         sfc_flow_spec_remove(sa, &flow->spec);
1532
1533 fail_filter_insert:
1534 fail_scale_key_set:
1535 fail_scale_mode_set:
1536         if (efs_rss_context != EFX_RSS_CONTEXT_DEFAULT)
1537                 efx_rx_scale_context_free(sa->nic, efs_rss_context);
1538
1539 fail_scale_context_alloc:
1540         return rc;
1541 }
1542
1543 static int
1544 sfc_flow_filter_remove(struct sfc_adapter *sa,
1545                        struct rte_flow *flow)
1546 {
1547         struct sfc_flow_spec_filter *spec_filter = &flow->spec.filter;
1548         int rc = 0;
1549
1550         rc = sfc_flow_spec_remove(sa, &flow->spec);
1551         if (rc != 0)
1552                 return rc;
1553
1554         if (spec_filter->rss) {
1555                 /*
1556                  * All specifications for a given flow rule have the same RSS
1557                  * context, so that RSS context value is taken from the first
1558                  * filter specification
1559                  */
1560                 efx_filter_spec_t *spec = &spec_filter->filters[0];
1561
1562                 rc = efx_rx_scale_context_free(sa->nic, spec->efs_rss_context);
1563         }
1564
1565         return rc;
1566 }
1567
1568 static int
1569 sfc_flow_parse_mark(struct sfc_adapter *sa,
1570                     const struct rte_flow_action_mark *mark,
1571                     struct rte_flow *flow)
1572 {
1573         struct sfc_flow_spec *spec = &flow->spec;
1574         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
1575         const efx_nic_cfg_t *encp = efx_nic_cfg_get(sa->nic);
1576
1577         if (mark == NULL || mark->id > encp->enc_filter_action_mark_max)
1578                 return EINVAL;
1579
1580         spec_filter->template.efs_flags |= EFX_FILTER_FLAG_ACTION_MARK;
1581         spec_filter->template.efs_mark = mark->id;
1582
1583         return 0;
1584 }
1585
1586 static int
1587 sfc_flow_parse_actions(struct sfc_adapter *sa,
1588                        const struct rte_flow_action actions[],
1589                        struct rte_flow *flow,
1590                        struct rte_flow_error *error)
1591 {
1592         int rc;
1593         struct sfc_flow_spec *spec = &flow->spec;
1594         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
1595         const unsigned int dp_rx_features = sa->priv.dp_rx->features;
1596         uint32_t actions_set = 0;
1597         const uint32_t fate_actions_mask = (1UL << RTE_FLOW_ACTION_TYPE_QUEUE) |
1598                                            (1UL << RTE_FLOW_ACTION_TYPE_RSS) |
1599                                            (1UL << RTE_FLOW_ACTION_TYPE_DROP);
1600         const uint32_t mark_actions_mask = (1UL << RTE_FLOW_ACTION_TYPE_MARK) |
1601                                            (1UL << RTE_FLOW_ACTION_TYPE_FLAG);
1602
1603         if (actions == NULL) {
1604                 rte_flow_error_set(error, EINVAL,
1605                                    RTE_FLOW_ERROR_TYPE_ACTION_NUM, NULL,
1606                                    "NULL actions");
1607                 return -rte_errno;
1608         }
1609
1610 #define SFC_BUILD_SET_OVERFLOW(_action, _set) \
1611         RTE_BUILD_BUG_ON(_action >= sizeof(_set) * CHAR_BIT)
1612
1613         for (; actions->type != RTE_FLOW_ACTION_TYPE_END; actions++) {
1614                 switch (actions->type) {
1615                 case RTE_FLOW_ACTION_TYPE_VOID:
1616                         SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ACTION_TYPE_VOID,
1617                                                actions_set);
1618                         break;
1619
1620                 case RTE_FLOW_ACTION_TYPE_QUEUE:
1621                         SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ACTION_TYPE_QUEUE,
1622                                                actions_set);
1623                         if ((actions_set & fate_actions_mask) != 0)
1624                                 goto fail_fate_actions;
1625
1626                         rc = sfc_flow_parse_queue(sa, actions->conf, flow);
1627                         if (rc != 0) {
1628                                 rte_flow_error_set(error, EINVAL,
1629                                         RTE_FLOW_ERROR_TYPE_ACTION, actions,
1630                                         "Bad QUEUE action");
1631                                 return -rte_errno;
1632                         }
1633                         break;
1634
1635                 case RTE_FLOW_ACTION_TYPE_RSS:
1636                         SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ACTION_TYPE_RSS,
1637                                                actions_set);
1638                         if ((actions_set & fate_actions_mask) != 0)
1639                                 goto fail_fate_actions;
1640
1641                         rc = sfc_flow_parse_rss(sa, actions->conf, flow);
1642                         if (rc != 0) {
1643                                 rte_flow_error_set(error, -rc,
1644                                         RTE_FLOW_ERROR_TYPE_ACTION, actions,
1645                                         "Bad RSS action");
1646                                 return -rte_errno;
1647                         }
1648                         break;
1649
1650                 case RTE_FLOW_ACTION_TYPE_DROP:
1651                         SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ACTION_TYPE_DROP,
1652                                                actions_set);
1653                         if ((actions_set & fate_actions_mask) != 0)
1654                                 goto fail_fate_actions;
1655
1656                         spec_filter->template.efs_dmaq_id =
1657                                 EFX_FILTER_SPEC_RX_DMAQ_ID_DROP;
1658                         break;
1659
1660                 case RTE_FLOW_ACTION_TYPE_FLAG:
1661                         SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ACTION_TYPE_FLAG,
1662                                                actions_set);
1663                         if ((actions_set & mark_actions_mask) != 0)
1664                                 goto fail_actions_overlap;
1665
1666                         if ((dp_rx_features & SFC_DP_RX_FEAT_FLOW_FLAG) == 0) {
1667                                 rte_flow_error_set(error, ENOTSUP,
1668                                         RTE_FLOW_ERROR_TYPE_ACTION, NULL,
1669                                         "FLAG action is not supported on the current Rx datapath");
1670                                 return -rte_errno;
1671                         }
1672
1673                         spec_filter->template.efs_flags |=
1674                                 EFX_FILTER_FLAG_ACTION_FLAG;
1675                         break;
1676
1677                 case RTE_FLOW_ACTION_TYPE_MARK:
1678                         SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ACTION_TYPE_MARK,
1679                                                actions_set);
1680                         if ((actions_set & mark_actions_mask) != 0)
1681                                 goto fail_actions_overlap;
1682
1683                         if ((dp_rx_features & SFC_DP_RX_FEAT_FLOW_MARK) == 0) {
1684                                 rte_flow_error_set(error, ENOTSUP,
1685                                         RTE_FLOW_ERROR_TYPE_ACTION, NULL,
1686                                         "MARK action is not supported on the current Rx datapath");
1687                                 return -rte_errno;
1688                         }
1689
1690                         rc = sfc_flow_parse_mark(sa, actions->conf, flow);
1691                         if (rc != 0) {
1692                                 rte_flow_error_set(error, rc,
1693                                         RTE_FLOW_ERROR_TYPE_ACTION, actions,
1694                                         "Bad MARK action");
1695                                 return -rte_errno;
1696                         }
1697                         break;
1698
1699                 default:
1700                         rte_flow_error_set(error, ENOTSUP,
1701                                            RTE_FLOW_ERROR_TYPE_ACTION, actions,
1702                                            "Action is not supported");
1703                         return -rte_errno;
1704                 }
1705
1706                 actions_set |= (1UL << actions->type);
1707         }
1708 #undef SFC_BUILD_SET_OVERFLOW
1709
1710         /* When fate is unknown, drop traffic. */
1711         if ((actions_set & fate_actions_mask) == 0) {
1712                 spec_filter->template.efs_dmaq_id =
1713                         EFX_FILTER_SPEC_RX_DMAQ_ID_DROP;
1714         }
1715
1716         return 0;
1717
1718 fail_fate_actions:
1719         rte_flow_error_set(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ACTION, actions,
1720                            "Cannot combine several fate-deciding actions, "
1721                            "choose between QUEUE, RSS or DROP");
1722         return -rte_errno;
1723
1724 fail_actions_overlap:
1725         rte_flow_error_set(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ACTION, actions,
1726                            "Overlapping actions are not supported");
1727         return -rte_errno;
1728 }
1729
1730 /**
1731  * Set the EFX_FILTER_MATCH_UNKNOWN_UCAST_DST
1732  * and EFX_FILTER_MATCH_UNKNOWN_MCAST_DST match flags in the same
1733  * specifications after copying.
1734  *
1735  * @param spec[in, out]
1736  *   SFC flow specification to update.
1737  * @param filters_count_for_one_val[in]
1738  *   How many specifications should have the same match flag, what is the
1739  *   number of specifications before copying.
1740  * @param error[out]
1741  *   Perform verbose error reporting if not NULL.
1742  */
1743 static int
1744 sfc_flow_set_unknown_dst_flags(struct sfc_flow_spec *spec,
1745                                unsigned int filters_count_for_one_val,
1746                                struct rte_flow_error *error)
1747 {
1748         unsigned int i;
1749         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
1750         static const efx_filter_match_flags_t vals[] = {
1751                 EFX_FILTER_MATCH_UNKNOWN_UCAST_DST,
1752                 EFX_FILTER_MATCH_UNKNOWN_MCAST_DST
1753         };
1754
1755         if (filters_count_for_one_val * RTE_DIM(vals) != spec_filter->count) {
1756                 rte_flow_error_set(error, EINVAL,
1757                         RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
1758                         "Number of specifications is incorrect while copying "
1759                         "by unknown destination flags");
1760                 return -rte_errno;
1761         }
1762
1763         for (i = 0; i < spec_filter->count; i++) {
1764                 /* The check above ensures that divisor can't be zero here */
1765                 spec_filter->filters[i].efs_match_flags |=
1766                         vals[i / filters_count_for_one_val];
1767         }
1768
1769         return 0;
1770 }
1771
1772 /**
1773  * Check that the following conditions are met:
1774  * - the list of supported filters has a filter
1775  *   with EFX_FILTER_MATCH_UNKNOWN_MCAST_DST flag instead of
1776  *   EFX_FILTER_MATCH_UNKNOWN_UCAST_DST, since this filter will also
1777  *   be inserted.
1778  *
1779  * @param match[in]
1780  *   The match flags of filter.
1781  * @param spec[in]
1782  *   Specification to be supplemented.
1783  * @param filter[in]
1784  *   SFC filter with list of supported filters.
1785  */
1786 static boolean_t
1787 sfc_flow_check_unknown_dst_flags(efx_filter_match_flags_t match,
1788                                  __rte_unused efx_filter_spec_t *spec,
1789                                  struct sfc_filter *filter)
1790 {
1791         unsigned int i;
1792         efx_filter_match_flags_t match_mcast_dst;
1793
1794         match_mcast_dst =
1795                 (match & ~EFX_FILTER_MATCH_UNKNOWN_UCAST_DST) |
1796                 EFX_FILTER_MATCH_UNKNOWN_MCAST_DST;
1797         for (i = 0; i < filter->supported_match_num; i++) {
1798                 if (match_mcast_dst == filter->supported_match[i])
1799                         return B_TRUE;
1800         }
1801
1802         return B_FALSE;
1803 }
1804
1805 /**
1806  * Set the EFX_FILTER_MATCH_ETHER_TYPE match flag and EFX_ETHER_TYPE_IPV4 and
1807  * EFX_ETHER_TYPE_IPV6 values of the corresponding field in the same
1808  * specifications after copying.
1809  *
1810  * @param spec[in, out]
1811  *   SFC flow specification to update.
1812  * @param filters_count_for_one_val[in]
1813  *   How many specifications should have the same EtherType value, what is the
1814  *   number of specifications before copying.
1815  * @param error[out]
1816  *   Perform verbose error reporting if not NULL.
1817  */
1818 static int
1819 sfc_flow_set_ethertypes(struct sfc_flow_spec *spec,
1820                         unsigned int filters_count_for_one_val,
1821                         struct rte_flow_error *error)
1822 {
1823         unsigned int i;
1824         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
1825         static const uint16_t vals[] = {
1826                 EFX_ETHER_TYPE_IPV4, EFX_ETHER_TYPE_IPV6
1827         };
1828
1829         if (filters_count_for_one_val * RTE_DIM(vals) != spec_filter->count) {
1830                 rte_flow_error_set(error, EINVAL,
1831                         RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
1832                         "Number of specifications is incorrect "
1833                         "while copying by Ethertype");
1834                 return -rte_errno;
1835         }
1836
1837         for (i = 0; i < spec_filter->count; i++) {
1838                 spec_filter->filters[i].efs_match_flags |=
1839                         EFX_FILTER_MATCH_ETHER_TYPE;
1840
1841                 /*
1842                  * The check above ensures that
1843                  * filters_count_for_one_val is not 0
1844                  */
1845                 spec_filter->filters[i].efs_ether_type =
1846                         vals[i / filters_count_for_one_val];
1847         }
1848
1849         return 0;
1850 }
1851
1852 /**
1853  * Set the EFX_FILTER_MATCH_OUTER_VID match flag with value 0
1854  * in the same specifications after copying.
1855  *
1856  * @param spec[in, out]
1857  *   SFC flow specification to update.
1858  * @param filters_count_for_one_val[in]
1859  *   How many specifications should have the same match flag, what is the
1860  *   number of specifications before copying.
1861  * @param error[out]
1862  *   Perform verbose error reporting if not NULL.
1863  */
1864 static int
1865 sfc_flow_set_outer_vid_flag(struct sfc_flow_spec *spec,
1866                             unsigned int filters_count_for_one_val,
1867                             struct rte_flow_error *error)
1868 {
1869         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
1870         unsigned int i;
1871
1872         if (filters_count_for_one_val != spec_filter->count) {
1873                 rte_flow_error_set(error, EINVAL,
1874                         RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
1875                         "Number of specifications is incorrect "
1876                         "while copying by outer VLAN ID");
1877                 return -rte_errno;
1878         }
1879
1880         for (i = 0; i < spec_filter->count; i++) {
1881                 spec_filter->filters[i].efs_match_flags |=
1882                         EFX_FILTER_MATCH_OUTER_VID;
1883
1884                 spec_filter->filters[i].efs_outer_vid = 0;
1885         }
1886
1887         return 0;
1888 }
1889
1890 /**
1891  * Set the EFX_FILTER_MATCH_IFRM_UNKNOWN_UCAST_DST and
1892  * EFX_FILTER_MATCH_IFRM_UNKNOWN_MCAST_DST match flags in the same
1893  * specifications after copying.
1894  *
1895  * @param spec[in, out]
1896  *   SFC flow specification to update.
1897  * @param filters_count_for_one_val[in]
1898  *   How many specifications should have the same match flag, what is the
1899  *   number of specifications before copying.
1900  * @param error[out]
1901  *   Perform verbose error reporting if not NULL.
1902  */
1903 static int
1904 sfc_flow_set_ifrm_unknown_dst_flags(struct sfc_flow_spec *spec,
1905                                     unsigned int filters_count_for_one_val,
1906                                     struct rte_flow_error *error)
1907 {
1908         unsigned int i;
1909         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
1910         static const efx_filter_match_flags_t vals[] = {
1911                 EFX_FILTER_MATCH_IFRM_UNKNOWN_UCAST_DST,
1912                 EFX_FILTER_MATCH_IFRM_UNKNOWN_MCAST_DST
1913         };
1914
1915         if (filters_count_for_one_val * RTE_DIM(vals) != spec_filter->count) {
1916                 rte_flow_error_set(error, EINVAL,
1917                         RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
1918                         "Number of specifications is incorrect while copying "
1919                         "by inner frame unknown destination flags");
1920                 return -rte_errno;
1921         }
1922
1923         for (i = 0; i < spec_filter->count; i++) {
1924                 /* The check above ensures that divisor can't be zero here */
1925                 spec_filter->filters[i].efs_match_flags |=
1926                         vals[i / filters_count_for_one_val];
1927         }
1928
1929         return 0;
1930 }
1931
1932 /**
1933  * Check that the following conditions are met:
1934  * - the specification corresponds to a filter for encapsulated traffic
1935  * - the list of supported filters has a filter
1936  *   with EFX_FILTER_MATCH_IFRM_UNKNOWN_MCAST_DST flag instead of
1937  *   EFX_FILTER_MATCH_IFRM_UNKNOWN_UCAST_DST, since this filter will also
1938  *   be inserted.
1939  *
1940  * @param match[in]
1941  *   The match flags of filter.
1942  * @param spec[in]
1943  *   Specification to be supplemented.
1944  * @param filter[in]
1945  *   SFC filter with list of supported filters.
1946  */
1947 static boolean_t
1948 sfc_flow_check_ifrm_unknown_dst_flags(efx_filter_match_flags_t match,
1949                                       efx_filter_spec_t *spec,
1950                                       struct sfc_filter *filter)
1951 {
1952         unsigned int i;
1953         efx_tunnel_protocol_t encap_type = spec->efs_encap_type;
1954         efx_filter_match_flags_t match_mcast_dst;
1955
1956         if (encap_type == EFX_TUNNEL_PROTOCOL_NONE)
1957                 return B_FALSE;
1958
1959         match_mcast_dst =
1960                 (match & ~EFX_FILTER_MATCH_IFRM_UNKNOWN_UCAST_DST) |
1961                 EFX_FILTER_MATCH_IFRM_UNKNOWN_MCAST_DST;
1962         for (i = 0; i < filter->supported_match_num; i++) {
1963                 if (match_mcast_dst == filter->supported_match[i])
1964                         return B_TRUE;
1965         }
1966
1967         return B_FALSE;
1968 }
1969
1970 /**
1971  * Check that the list of supported filters has a filter that differs
1972  * from @p match in that it has no flag EFX_FILTER_MATCH_OUTER_VID
1973  * in this case that filter will be used and the flag
1974  * EFX_FILTER_MATCH_OUTER_VID is not needed.
1975  *
1976  * @param match[in]
1977  *   The match flags of filter.
1978  * @param spec[in]
1979  *   Specification to be supplemented.
1980  * @param filter[in]
1981  *   SFC filter with list of supported filters.
1982  */
1983 static boolean_t
1984 sfc_flow_check_outer_vid_flag(efx_filter_match_flags_t match,
1985                               __rte_unused efx_filter_spec_t *spec,
1986                               struct sfc_filter *filter)
1987 {
1988         unsigned int i;
1989         efx_filter_match_flags_t match_without_vid =
1990                 match & ~EFX_FILTER_MATCH_OUTER_VID;
1991
1992         for (i = 0; i < filter->supported_match_num; i++) {
1993                 if (match_without_vid == filter->supported_match[i])
1994                         return B_FALSE;
1995         }
1996
1997         return B_TRUE;
1998 }
1999
2000 /*
2001  * Match flags that can be automatically added to filters.
2002  * Selecting the last minimum when searching for the copy flag ensures that the
2003  * EFX_FILTER_MATCH_UNKNOWN_UCAST_DST flag has a higher priority than
2004  * EFX_FILTER_MATCH_ETHER_TYPE. This is because the filter
2005  * EFX_FILTER_MATCH_UNKNOWN_UCAST_DST is at the end of the list of supported
2006  * filters.
2007  */
2008 static const struct sfc_flow_copy_flag sfc_flow_copy_flags[] = {
2009         {
2010                 .flag = EFX_FILTER_MATCH_UNKNOWN_UCAST_DST,
2011                 .vals_count = 2,
2012                 .set_vals = sfc_flow_set_unknown_dst_flags,
2013                 .spec_check = sfc_flow_check_unknown_dst_flags,
2014         },
2015         {
2016                 .flag = EFX_FILTER_MATCH_ETHER_TYPE,
2017                 .vals_count = 2,
2018                 .set_vals = sfc_flow_set_ethertypes,
2019                 .spec_check = NULL,
2020         },
2021         {
2022                 .flag = EFX_FILTER_MATCH_IFRM_UNKNOWN_UCAST_DST,
2023                 .vals_count = 2,
2024                 .set_vals = sfc_flow_set_ifrm_unknown_dst_flags,
2025                 .spec_check = sfc_flow_check_ifrm_unknown_dst_flags,
2026         },
2027         {
2028                 .flag = EFX_FILTER_MATCH_OUTER_VID,
2029                 .vals_count = 1,
2030                 .set_vals = sfc_flow_set_outer_vid_flag,
2031                 .spec_check = sfc_flow_check_outer_vid_flag,
2032         },
2033 };
2034
2035 /* Get item from array sfc_flow_copy_flags */
2036 static const struct sfc_flow_copy_flag *
2037 sfc_flow_get_copy_flag(efx_filter_match_flags_t flag)
2038 {
2039         unsigned int i;
2040
2041         for (i = 0; i < RTE_DIM(sfc_flow_copy_flags); i++) {
2042                 if (sfc_flow_copy_flags[i].flag == flag)
2043                         return &sfc_flow_copy_flags[i];
2044         }
2045
2046         return NULL;
2047 }
2048
2049 /**
2050  * Make copies of the specifications, set match flag and values
2051  * of the field that corresponds to it.
2052  *
2053  * @param spec[in, out]
2054  *   SFC flow specification to update.
2055  * @param flag[in]
2056  *   The match flag to add.
2057  * @param error[out]
2058  *   Perform verbose error reporting if not NULL.
2059  */
2060 static int
2061 sfc_flow_spec_add_match_flag(struct sfc_flow_spec *spec,
2062                              efx_filter_match_flags_t flag,
2063                              struct rte_flow_error *error)
2064 {
2065         unsigned int i;
2066         unsigned int new_filters_count;
2067         unsigned int filters_count_for_one_val;
2068         const struct sfc_flow_copy_flag *copy_flag;
2069         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
2070         int rc;
2071
2072         copy_flag = sfc_flow_get_copy_flag(flag);
2073         if (copy_flag == NULL) {
2074                 rte_flow_error_set(error, ENOTSUP,
2075                                    RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
2076                                    "Unsupported spec field for copying");
2077                 return -rte_errno;
2078         }
2079
2080         new_filters_count = spec_filter->count * copy_flag->vals_count;
2081         if (new_filters_count > SF_FLOW_SPEC_NB_FILTERS_MAX) {
2082                 rte_flow_error_set(error, EINVAL,
2083                         RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
2084                         "Too much EFX specifications in the flow rule");
2085                 return -rte_errno;
2086         }
2087
2088         /* Copy filters specifications */
2089         for (i = spec_filter->count; i < new_filters_count; i++) {
2090                 spec_filter->filters[i] =
2091                         spec_filter->filters[i - spec_filter->count];
2092         }
2093
2094         filters_count_for_one_val = spec_filter->count;
2095         spec_filter->count = new_filters_count;
2096
2097         rc = copy_flag->set_vals(spec, filters_count_for_one_val, error);
2098         if (rc != 0)
2099                 return rc;
2100
2101         return 0;
2102 }
2103
2104 /**
2105  * Check that the given set of match flags missing in the original filter spec
2106  * could be covered by adding spec copies which specify the corresponding
2107  * flags and packet field values to match.
2108  *
2109  * @param miss_flags[in]
2110  *   Flags that are missing until the supported filter.
2111  * @param spec[in]
2112  *   Specification to be supplemented.
2113  * @param filter[in]
2114  *   SFC filter.
2115  *
2116  * @return
2117  *   Number of specifications after copy or 0, if the flags can not be added.
2118  */
2119 static unsigned int
2120 sfc_flow_check_missing_flags(efx_filter_match_flags_t miss_flags,
2121                              efx_filter_spec_t *spec,
2122                              struct sfc_filter *filter)
2123 {
2124         unsigned int i;
2125         efx_filter_match_flags_t copy_flags = 0;
2126         efx_filter_match_flags_t flag;
2127         efx_filter_match_flags_t match = spec->efs_match_flags | miss_flags;
2128         sfc_flow_spec_check *check;
2129         unsigned int multiplier = 1;
2130
2131         for (i = 0; i < RTE_DIM(sfc_flow_copy_flags); i++) {
2132                 flag = sfc_flow_copy_flags[i].flag;
2133                 check = sfc_flow_copy_flags[i].spec_check;
2134                 if ((flag & miss_flags) == flag) {
2135                         if (check != NULL && (!check(match, spec, filter)))
2136                                 continue;
2137
2138                         copy_flags |= flag;
2139                         multiplier *= sfc_flow_copy_flags[i].vals_count;
2140                 }
2141         }
2142
2143         if (copy_flags == miss_flags)
2144                 return multiplier;
2145
2146         return 0;
2147 }
2148
2149 /**
2150  * Attempt to supplement the specification template to the minimally
2151  * supported set of match flags. To do this, it is necessary to copy
2152  * the specifications, filling them with the values of fields that
2153  * correspond to the missing flags.
2154  * The necessary and sufficient filter is built from the fewest number
2155  * of copies which could be made to cover the minimally required set
2156  * of flags.
2157  *
2158  * @param sa[in]
2159  *   SFC adapter.
2160  * @param spec[in, out]
2161  *   SFC flow specification to update.
2162  * @param error[out]
2163  *   Perform verbose error reporting if not NULL.
2164  */
2165 static int
2166 sfc_flow_spec_filters_complete(struct sfc_adapter *sa,
2167                                struct sfc_flow_spec *spec,
2168                                struct rte_flow_error *error)
2169 {
2170         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
2171         struct sfc_filter *filter = &sa->filter;
2172         efx_filter_match_flags_t miss_flags;
2173         efx_filter_match_flags_t min_miss_flags = 0;
2174         efx_filter_match_flags_t match;
2175         unsigned int min_multiplier = UINT_MAX;
2176         unsigned int multiplier;
2177         unsigned int i;
2178         int rc;
2179
2180         match = spec_filter->template.efs_match_flags;
2181         for (i = 0; i < filter->supported_match_num; i++) {
2182                 if ((match & filter->supported_match[i]) == match) {
2183                         miss_flags = filter->supported_match[i] & (~match);
2184                         multiplier = sfc_flow_check_missing_flags(miss_flags,
2185                                 &spec_filter->template, filter);
2186                         if (multiplier > 0) {
2187                                 if (multiplier <= min_multiplier) {
2188                                         min_multiplier = multiplier;
2189                                         min_miss_flags = miss_flags;
2190                                 }
2191                         }
2192                 }
2193         }
2194
2195         if (min_multiplier == UINT_MAX) {
2196                 rte_flow_error_set(error, ENOTSUP,
2197                                    RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
2198                                    "The flow rule pattern is unsupported");
2199                 return -rte_errno;
2200         }
2201
2202         for (i = 0; i < RTE_DIM(sfc_flow_copy_flags); i++) {
2203                 efx_filter_match_flags_t flag = sfc_flow_copy_flags[i].flag;
2204
2205                 if ((flag & min_miss_flags) == flag) {
2206                         rc = sfc_flow_spec_add_match_flag(spec, flag, error);
2207                         if (rc != 0)
2208                                 return rc;
2209                 }
2210         }
2211
2212         return 0;
2213 }
2214
2215 /**
2216  * Check that set of match flags is referred to by a filter. Filter is
2217  * described by match flags with the ability to add OUTER_VID and INNER_VID
2218  * flags.
2219  *
2220  * @param match_flags[in]
2221  *   Set of match flags.
2222  * @param flags_pattern[in]
2223  *   Pattern of filter match flags.
2224  */
2225 static boolean_t
2226 sfc_flow_is_match_with_vids(efx_filter_match_flags_t match_flags,
2227                             efx_filter_match_flags_t flags_pattern)
2228 {
2229         if ((match_flags & flags_pattern) != flags_pattern)
2230                 return B_FALSE;
2231
2232         switch (match_flags & ~flags_pattern) {
2233         case 0:
2234         case EFX_FILTER_MATCH_OUTER_VID:
2235         case EFX_FILTER_MATCH_OUTER_VID | EFX_FILTER_MATCH_INNER_VID:
2236                 return B_TRUE;
2237         default:
2238                 return B_FALSE;
2239         }
2240 }
2241
2242 /**
2243  * Check whether the spec maps to a hardware filter which is known to be
2244  * ineffective despite being valid.
2245  *
2246  * @param filter[in]
2247  *   SFC filter with list of supported filters.
2248  * @param spec[in]
2249  *   SFC flow specification.
2250  */
2251 static boolean_t
2252 sfc_flow_is_match_flags_exception(struct sfc_filter *filter,
2253                                   struct sfc_flow_spec *spec)
2254 {
2255         unsigned int i;
2256         uint16_t ether_type;
2257         uint8_t ip_proto;
2258         efx_filter_match_flags_t match_flags;
2259         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
2260
2261         for (i = 0; i < spec_filter->count; i++) {
2262                 match_flags = spec_filter->filters[i].efs_match_flags;
2263
2264                 if (sfc_flow_is_match_with_vids(match_flags,
2265                                                 EFX_FILTER_MATCH_ETHER_TYPE) ||
2266                     sfc_flow_is_match_with_vids(match_flags,
2267                                                 EFX_FILTER_MATCH_ETHER_TYPE |
2268                                                 EFX_FILTER_MATCH_LOC_MAC)) {
2269                         ether_type = spec_filter->filters[i].efs_ether_type;
2270                         if (filter->supports_ip_proto_or_addr_filter &&
2271                             (ether_type == EFX_ETHER_TYPE_IPV4 ||
2272                              ether_type == EFX_ETHER_TYPE_IPV6))
2273                                 return B_TRUE;
2274                 } else if (sfc_flow_is_match_with_vids(match_flags,
2275                                 EFX_FILTER_MATCH_ETHER_TYPE |
2276                                 EFX_FILTER_MATCH_IP_PROTO) ||
2277                            sfc_flow_is_match_with_vids(match_flags,
2278                                 EFX_FILTER_MATCH_ETHER_TYPE |
2279                                 EFX_FILTER_MATCH_IP_PROTO |
2280                                 EFX_FILTER_MATCH_LOC_MAC)) {
2281                         ip_proto = spec_filter->filters[i].efs_ip_proto;
2282                         if (filter->supports_rem_or_local_port_filter &&
2283                             (ip_proto == EFX_IPPROTO_TCP ||
2284                              ip_proto == EFX_IPPROTO_UDP))
2285                                 return B_TRUE;
2286                 }
2287         }
2288
2289         return B_FALSE;
2290 }
2291
2292 static int
2293 sfc_flow_validate_match_flags(struct sfc_adapter *sa,
2294                               struct rte_flow *flow,
2295                               struct rte_flow_error *error)
2296 {
2297         struct sfc_flow_spec *spec = &flow->spec;
2298         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
2299         efx_filter_spec_t *spec_tmpl = &spec_filter->template;
2300         efx_filter_match_flags_t match_flags = spec_tmpl->efs_match_flags;
2301         int rc;
2302
2303         /* Initialize the first filter spec with template */
2304         spec_filter->filters[0] = *spec_tmpl;
2305         spec_filter->count = 1;
2306
2307         if (!sfc_filter_is_match_supported(sa, match_flags)) {
2308                 rc = sfc_flow_spec_filters_complete(sa, &flow->spec, error);
2309                 if (rc != 0)
2310                         return rc;
2311         }
2312
2313         if (sfc_flow_is_match_flags_exception(&sa->filter, &flow->spec)) {
2314                 rte_flow_error_set(error, ENOTSUP,
2315                         RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
2316                         "The flow rule pattern is unsupported");
2317                 return -rte_errno;
2318         }
2319
2320         return 0;
2321 }
2322
2323 static int
2324 sfc_flow_parse_rte_to_filter(struct rte_eth_dev *dev,
2325                              const struct rte_flow_item pattern[],
2326                              const struct rte_flow_action actions[],
2327                              struct rte_flow *flow,
2328                              struct rte_flow_error *error)
2329 {
2330         struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
2331         struct sfc_flow_spec *spec = &flow->spec;
2332         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
2333         struct sfc_flow_parse_ctx ctx;
2334         int rc;
2335
2336         ctx.type = SFC_FLOW_PARSE_CTX_FILTER;
2337         ctx.filter = &spec_filter->template;
2338
2339         rc = sfc_flow_parse_pattern(sfc_flow_items, RTE_DIM(sfc_flow_items),
2340                                     pattern, &ctx, error);
2341         if (rc != 0)
2342                 goto fail_bad_value;
2343
2344         rc = sfc_flow_parse_actions(sa, actions, flow, error);
2345         if (rc != 0)
2346                 goto fail_bad_value;
2347
2348         rc = sfc_flow_validate_match_flags(sa, flow, error);
2349         if (rc != 0)
2350                 goto fail_bad_value;
2351
2352         return 0;
2353
2354 fail_bad_value:
2355         return rc;
2356 }
2357
2358 static int
2359 sfc_flow_parse(struct rte_eth_dev *dev,
2360                const struct rte_flow_attr *attr,
2361                const struct rte_flow_item pattern[],
2362                const struct rte_flow_action actions[],
2363                struct rte_flow *flow,
2364                struct rte_flow_error *error)
2365 {
2366         const struct sfc_flow_ops_by_spec *ops;
2367         int rc;
2368
2369         rc = sfc_flow_parse_attr(attr, flow, error);
2370         if (rc != 0)
2371                 return rc;
2372
2373         ops = sfc_flow_get_ops_by_spec(flow);
2374         if (ops == NULL || ops->parse == NULL) {
2375                 rte_flow_error_set(error, ENOTSUP,
2376                                    RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
2377                                    "No backend to handle this flow");
2378                 return -rte_errno;
2379         }
2380
2381         return ops->parse(dev, pattern, actions, flow, error);
2382 }
2383
2384 static struct rte_flow *
2385 sfc_flow_zmalloc(struct rte_flow_error *error)
2386 {
2387         struct rte_flow *flow;
2388
2389         flow = rte_zmalloc("sfc_rte_flow", sizeof(*flow), 0);
2390         if (flow == NULL) {
2391                 rte_flow_error_set(error, ENOMEM,
2392                                    RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
2393                                    "Failed to allocate memory");
2394         }
2395
2396         return flow;
2397 }
2398
2399 static void
2400 sfc_flow_free(__rte_unused struct sfc_adapter *sa, struct rte_flow *flow)
2401 {
2402         rte_free(flow);
2403 }
2404
2405 static int
2406 sfc_flow_insert(struct sfc_adapter *sa, struct rte_flow *flow,
2407                 struct rte_flow_error *error)
2408 {
2409         const struct sfc_flow_ops_by_spec *ops;
2410         int rc;
2411
2412         ops = sfc_flow_get_ops_by_spec(flow);
2413         if (ops == NULL || ops->insert == NULL) {
2414                 rte_flow_error_set(error, ENOTSUP,
2415                                    RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
2416                                    "No backend to handle this flow");
2417                 return rte_errno;
2418         }
2419
2420         rc = ops->insert(sa, flow);
2421         if (rc != 0) {
2422                 rte_flow_error_set(error, rc, RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
2423                                    NULL, "Failed to insert the flow rule");
2424         }
2425
2426         return rc;
2427 }
2428
2429 static int
2430 sfc_flow_remove(struct sfc_adapter *sa, struct rte_flow *flow,
2431                 struct rte_flow_error *error)
2432 {
2433         const struct sfc_flow_ops_by_spec *ops;
2434         int rc;
2435
2436         ops = sfc_flow_get_ops_by_spec(flow);
2437         if (ops == NULL || ops->remove == NULL) {
2438                 rte_flow_error_set(error, ENOTSUP,
2439                                    RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
2440                                    "No backend to handle this flow");
2441                 return rte_errno;
2442         }
2443
2444         rc = ops->remove(sa, flow);
2445         if (rc != 0) {
2446                 rte_flow_error_set(error, rc, RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
2447                                    NULL, "Failed to remove the flow rule");
2448         }
2449
2450         return rc;
2451 }
2452
2453 static int
2454 sfc_flow_validate(struct rte_eth_dev *dev,
2455                   const struct rte_flow_attr *attr,
2456                   const struct rte_flow_item pattern[],
2457                   const struct rte_flow_action actions[],
2458                   struct rte_flow_error *error)
2459 {
2460         struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
2461         struct rte_flow *flow;
2462         int rc;
2463
2464         flow = sfc_flow_zmalloc(error);
2465         if (flow == NULL)
2466                 return -rte_errno;
2467
2468         rc = sfc_flow_parse(dev, attr, pattern, actions, flow, error);
2469
2470         sfc_flow_free(sa, flow);
2471
2472         return rc;
2473 }
2474
2475 static struct rte_flow *
2476 sfc_flow_create(struct rte_eth_dev *dev,
2477                 const struct rte_flow_attr *attr,
2478                 const struct rte_flow_item pattern[],
2479                 const struct rte_flow_action actions[],
2480                 struct rte_flow_error *error)
2481 {
2482         struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
2483         struct rte_flow *flow = NULL;
2484         int rc;
2485
2486         flow = sfc_flow_zmalloc(error);
2487         if (flow == NULL)
2488                 goto fail_no_mem;
2489
2490         rc = sfc_flow_parse(dev, attr, pattern, actions, flow, error);
2491         if (rc != 0)
2492                 goto fail_bad_value;
2493
2494         sfc_adapter_lock(sa);
2495
2496         TAILQ_INSERT_TAIL(&sa->flow_list, flow, entries);
2497
2498         if (sa->state == SFC_ADAPTER_STARTED) {
2499                 rc = sfc_flow_insert(sa, flow, error);
2500                 if (rc != 0)
2501                         goto fail_flow_insert;
2502         }
2503
2504         sfc_adapter_unlock(sa);
2505
2506         return flow;
2507
2508 fail_flow_insert:
2509         TAILQ_REMOVE(&sa->flow_list, flow, entries);
2510
2511 fail_bad_value:
2512         sfc_flow_free(sa, flow);
2513         sfc_adapter_unlock(sa);
2514
2515 fail_no_mem:
2516         return NULL;
2517 }
2518
2519 static int
2520 sfc_flow_destroy(struct rte_eth_dev *dev,
2521                  struct rte_flow *flow,
2522                  struct rte_flow_error *error)
2523 {
2524         struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
2525         struct rte_flow *flow_ptr;
2526         int rc = EINVAL;
2527
2528         sfc_adapter_lock(sa);
2529
2530         TAILQ_FOREACH(flow_ptr, &sa->flow_list, entries) {
2531                 if (flow_ptr == flow)
2532                         rc = 0;
2533         }
2534         if (rc != 0) {
2535                 rte_flow_error_set(error, rc,
2536                                    RTE_FLOW_ERROR_TYPE_HANDLE, NULL,
2537                                    "Failed to find flow rule to destroy");
2538                 goto fail_bad_value;
2539         }
2540
2541         if (sa->state == SFC_ADAPTER_STARTED)
2542                 rc = sfc_flow_remove(sa, flow, error);
2543
2544         TAILQ_REMOVE(&sa->flow_list, flow, entries);
2545         sfc_flow_free(sa, flow);
2546
2547 fail_bad_value:
2548         sfc_adapter_unlock(sa);
2549
2550         return -rc;
2551 }
2552
2553 static int
2554 sfc_flow_flush(struct rte_eth_dev *dev,
2555                struct rte_flow_error *error)
2556 {
2557         struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
2558         struct rte_flow *flow;
2559         int ret = 0;
2560
2561         sfc_adapter_lock(sa);
2562
2563         while ((flow = TAILQ_FIRST(&sa->flow_list)) != NULL) {
2564                 if (sa->state == SFC_ADAPTER_STARTED) {
2565                         int rc;
2566
2567                         rc = sfc_flow_remove(sa, flow, error);
2568                         if (rc != 0)
2569                                 ret = rc;
2570                 }
2571
2572                 TAILQ_REMOVE(&sa->flow_list, flow, entries);
2573                 sfc_flow_free(sa, flow);
2574         }
2575
2576         sfc_adapter_unlock(sa);
2577
2578         return -ret;
2579 }
2580
2581 static int
2582 sfc_flow_isolate(struct rte_eth_dev *dev, int enable,
2583                  struct rte_flow_error *error)
2584 {
2585         struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
2586         int ret = 0;
2587
2588         sfc_adapter_lock(sa);
2589         if (sa->state != SFC_ADAPTER_INITIALIZED) {
2590                 rte_flow_error_set(error, EBUSY,
2591                                    RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
2592                                    NULL, "please close the port first");
2593                 ret = -rte_errno;
2594         } else {
2595                 sfc_sa2shared(sa)->isolated = (enable) ? B_TRUE : B_FALSE;
2596         }
2597         sfc_adapter_unlock(sa);
2598
2599         return ret;
2600 }
2601
2602 const struct rte_flow_ops sfc_flow_ops = {
2603         .validate = sfc_flow_validate,
2604         .create = sfc_flow_create,
2605         .destroy = sfc_flow_destroy,
2606         .flush = sfc_flow_flush,
2607         .query = NULL,
2608         .isolate = sfc_flow_isolate,
2609 };
2610
2611 void
2612 sfc_flow_init(struct sfc_adapter *sa)
2613 {
2614         SFC_ASSERT(sfc_adapter_is_locked(sa));
2615
2616         TAILQ_INIT(&sa->flow_list);
2617 }
2618
2619 void
2620 sfc_flow_fini(struct sfc_adapter *sa)
2621 {
2622         struct rte_flow *flow;
2623
2624         SFC_ASSERT(sfc_adapter_is_locked(sa));
2625
2626         while ((flow = TAILQ_FIRST(&sa->flow_list)) != NULL) {
2627                 TAILQ_REMOVE(&sa->flow_list, flow, entries);
2628                 sfc_flow_free(sa, flow);
2629         }
2630 }
2631
2632 void
2633 sfc_flow_stop(struct sfc_adapter *sa)
2634 {
2635         struct rte_flow *flow;
2636
2637         SFC_ASSERT(sfc_adapter_is_locked(sa));
2638
2639         TAILQ_FOREACH(flow, &sa->flow_list, entries)
2640                 sfc_flow_remove(sa, flow, NULL);
2641 }
2642
2643 int
2644 sfc_flow_start(struct sfc_adapter *sa)
2645 {
2646         struct rte_flow *flow;
2647         int rc = 0;
2648
2649         sfc_log_init(sa, "entry");
2650
2651         SFC_ASSERT(sfc_adapter_is_locked(sa));
2652
2653         TAILQ_FOREACH(flow, &sa->flow_list, entries) {
2654                 rc = sfc_flow_insert(sa, flow, NULL);
2655                 if (rc != 0)
2656                         goto fail_bad_flow;
2657         }
2658
2659         sfc_log_init(sa, "done");
2660
2661 fail_bad_flow:
2662         return rc;
2663 }