drivers/net/sfc/sfc_flow.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  *
   3  * Copyright(c) 2019-2021 Xilinx, Inc.
   4  * Copyright(c) 2017-2019 Solarflare Communications Inc.
   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 <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_debug.h"
  22 #include "sfc_rx.h"
  23 #include "sfc_filter.h"
  24 #include "sfc_flow.h"
  25 #include "sfc_log.h"
  26 #include "sfc_dp_rx.h"
  27 #include "sfc_mae_counter.h"
  28
  29 struct sfc_flow_ops_by_spec {
  30         sfc_flow_parse_cb_t     *parse;
  31         sfc_flow_verify_cb_t    *verify;
  32         sfc_flow_cleanup_cb_t   *cleanup;
  33         sfc_flow_insert_cb_t    *insert;
  34         sfc_flow_remove_cb_t    *remove;
  35 };
  36
  37 static sfc_flow_parse_cb_t sfc_flow_parse_rte_to_filter;
  38 static sfc_flow_parse_cb_t sfc_flow_parse_rte_to_mae;
  39 static sfc_flow_insert_cb_t sfc_flow_filter_insert;
  40 static sfc_flow_remove_cb_t sfc_flow_filter_remove;
  41
  42 static const struct sfc_flow_ops_by_spec sfc_flow_ops_filter = {
  43         .parse = sfc_flow_parse_rte_to_filter,
  44         .verify = NULL,
  45         .cleanup = NULL,
  46         .insert = sfc_flow_filter_insert,
  47         .remove = sfc_flow_filter_remove,
  48 };
  49
  50 static const struct sfc_flow_ops_by_spec sfc_flow_ops_mae = {
  51         .parse = sfc_flow_parse_rte_to_mae,
  52         .verify = sfc_mae_flow_verify,
  53         .cleanup = sfc_mae_flow_cleanup,
  54         .insert = sfc_mae_flow_insert,
  55         .remove = sfc_mae_flow_remove,
  56 };
  57
  58 static const struct sfc_flow_ops_by_spec *
  59 sfc_flow_get_ops_by_spec(struct rte_flow *flow)
  60 {
  61         struct sfc_flow_spec *spec = &flow->spec;
  62         const struct sfc_flow_ops_by_spec *ops = NULL;
  63
  64         switch (spec->type) {
  65         case SFC_FLOW_SPEC_FILTER:
  66                 ops = &sfc_flow_ops_filter;
  67                 break;
  68         case SFC_FLOW_SPEC_MAE:
  69                 ops = &sfc_flow_ops_mae;
  70                 break;
  71         default:
  72                 SFC_ASSERT(false);
  73                 break;
  74         }
  75
  76         return ops;
  77 }
  78
  79 /*
  80  * Currently, filter-based (VNIC) flow API is implemented in such a manner
  81  * that each flow rule is converted to one or more hardware filters.
  82  * All elements of flow rule (attributes, pattern items, actions)
  83  * correspond to one or more fields in the efx_filter_spec_s structure
  84  * that is responsible for the hardware filter.
  85  * If some required field is unset in the flow rule, then a handful
  86  * of filter copies will be created to cover all possible values
  87  * of such a field.
  88  */
  89
  90 static sfc_flow_item_parse sfc_flow_parse_void;
  91 static sfc_flow_item_parse sfc_flow_parse_eth;
  92 static sfc_flow_item_parse sfc_flow_parse_vlan;
  93 static sfc_flow_item_parse sfc_flow_parse_ipv4;
  94 static sfc_flow_item_parse sfc_flow_parse_ipv6;
  95 static sfc_flow_item_parse sfc_flow_parse_tcp;
  96 static sfc_flow_item_parse sfc_flow_parse_udp;
  97 static sfc_flow_item_parse sfc_flow_parse_vxlan;
  98 static sfc_flow_item_parse sfc_flow_parse_geneve;
  99 static sfc_flow_item_parse sfc_flow_parse_nvgre;
 100 static sfc_flow_item_parse sfc_flow_parse_pppoex;
 101
 102 typedef int (sfc_flow_spec_set_vals)(struct sfc_flow_spec *spec,
 103                                      unsigned int filters_count_for_one_val,
 104                                      struct rte_flow_error *error);
 105
 106 typedef boolean_t (sfc_flow_spec_check)(efx_filter_match_flags_t match,
 107                                         efx_filter_spec_t *spec,
 108                                         struct sfc_filter *filter);
 109
 110 struct sfc_flow_copy_flag {
 111         /* EFX filter specification match flag */
 112         efx_filter_match_flags_t flag;
 113         /* Number of values of corresponding field */
 114         unsigned int vals_count;
 115         /* Function to set values in specifications */
 116         sfc_flow_spec_set_vals *set_vals;
 117         /*
 118          * Function to check that the specification is suitable
 119          * for adding this match flag
 120          */
 121         sfc_flow_spec_check *spec_check;
 122 };
 123
 124 static sfc_flow_spec_set_vals sfc_flow_set_unknown_dst_flags;
 125 static sfc_flow_spec_check sfc_flow_check_unknown_dst_flags;
 126 static sfc_flow_spec_set_vals sfc_flow_set_ethertypes;
 127 static sfc_flow_spec_set_vals sfc_flow_set_ifrm_unknown_dst_flags;
 128 static sfc_flow_spec_check sfc_flow_check_ifrm_unknown_dst_flags;
 129 static sfc_flow_spec_set_vals sfc_flow_set_outer_vid_flag;
 130 static sfc_flow_spec_check sfc_flow_check_outer_vid_flag;
 131
 132 static boolean_t
 133 sfc_flow_is_zero(const uint8_t *buf, unsigned int size)
 134 {
 135         uint8_t sum = 0;
 136         unsigned int i;
 137
 138         for (i = 0; i < size; i++)
 139                 sum |= buf[i];
 140
 141         return (sum == 0) ? B_TRUE : B_FALSE;
 142 }
 143
 144 /*
 145  * Validate item and prepare structures spec and mask for parsing
 146  */
 147 int
 148 sfc_flow_parse_init(const struct rte_flow_item *item,
 149                     const void **spec_ptr,
 150                     const void **mask_ptr,
 151                     const void *supp_mask,
 152                     const void *def_mask,
 153                     unsigned int size,
 154                     struct rte_flow_error *error)
 155 {
 156         const uint8_t *spec;
 157         const uint8_t *mask;
 158         const uint8_t *last;
 159         uint8_t supp;
 160         unsigned int i;
 161
 162         if (item == NULL) {
 163                 rte_flow_error_set(error, EINVAL,
 164                                    RTE_FLOW_ERROR_TYPE_ITEM, NULL,
 165                                    "NULL item");
 166                 return -rte_errno;
 167         }
 168
 169         if ((item->last != NULL || item->mask != NULL) && item->spec == NULL) {
 170                 rte_flow_error_set(error, EINVAL,
 171                                    RTE_FLOW_ERROR_TYPE_ITEM, item,
 172                                    "Mask or last is set without spec");
 173                 return -rte_errno;
 174         }
 175
 176         /*
 177          * If "mask" is not set, default mask is used,
 178          * but if default mask is NULL, "mask" should be set
 179          */
 180         if (item->mask == NULL) {
 181                 if (def_mask == NULL) {
 182                         rte_flow_error_set(error, EINVAL,
 183                                 RTE_FLOW_ERROR_TYPE_ITEM, NULL,
 184                                 "Mask should be specified");
 185                         return -rte_errno;
 186                 }
 187
 188                 mask = def_mask;
 189         } else {
 190                 mask = item->mask;
 191         }
 192
 193         spec = item->spec;
 194         last = item->last;
 195
 196         if (spec == NULL)
 197                 goto exit;
 198
 199         /*
 200          * If field values in "last" are either 0 or equal to the corresponding
 201          * values in "spec" then they are ignored
 202          */
 203         if (last != NULL &&
 204             !sfc_flow_is_zero(last, size) &&
 205             memcmp(last, spec, size) != 0) {
 206                 rte_flow_error_set(error, ENOTSUP,
 207                                    RTE_FLOW_ERROR_TYPE_ITEM, item,
 208                                    "Ranging is not supported");
 209                 return -rte_errno;
 210         }
 211
 212         if (supp_mask == NULL) {
 213                 rte_flow_error_set(error, EINVAL,
 214                         RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
 215                         "Supported mask for item should be specified");
 216                 return -rte_errno;
 217         }
 218
 219         /* Check that mask does not ask for more match than supp_mask */
 220         for (i = 0; i < size; i++) {
 221                 supp = ((const uint8_t *)supp_mask)[i];
 222
 223                 if (~supp & mask[i]) {
 224                         rte_flow_error_set(error, ENOTSUP,
 225                                            RTE_FLOW_ERROR_TYPE_ITEM, item,
 226                                            "Item's field is not supported");
 227                         return -rte_errno;
 228                 }
 229         }
 230
 231 exit:
 232         *spec_ptr = spec;
 233         *mask_ptr = mask;
 234         return 0;
 235 }
 236
 237 /*
 238  * Protocol parsers.
 239  * Masking is not supported, so masks in items should be either
 240  * full or empty (zeroed) and set only for supported fields which
 241  * are specified in the supp_mask.
 242  */
 243
 244 static int
 245 sfc_flow_parse_void(__rte_unused const struct rte_flow_item *item,
 246                     __rte_unused struct sfc_flow_parse_ctx *parse_ctx,
 247                     __rte_unused struct rte_flow_error *error)
 248 {
 249         return 0;
 250 }
 251
 252 /**
 253  * Convert Ethernet item to EFX filter specification.
 254  *
 255  * @param item[in]
 256  *   Item specification. Outer frame specification may only comprise
 257  *   source/destination addresses and Ethertype field.
 258  *   Inner frame specification may contain destination address only.
 259  *   There is support for individual/group mask as well as for empty and full.
 260  *   If the mask is NULL, default mask will be used. Ranging is not supported.
 261  * @param efx_spec[in, out]
 262  *   EFX filter specification to update.
 263  * @param[out] error
 264  *   Perform verbose error reporting if not NULL.
 265  */
 266 static int
 267 sfc_flow_parse_eth(const struct rte_flow_item *item,
 268                    struct sfc_flow_parse_ctx *parse_ctx,
 269                    struct rte_flow_error *error)
 270 {
 271         int rc;
 272         efx_filter_spec_t *efx_spec = parse_ctx->filter;
 273         const struct rte_flow_item_eth *spec = NULL;
 274         const struct rte_flow_item_eth *mask = NULL;
 275         const struct rte_flow_item_eth supp_mask = {
 276                 .dst.addr_bytes = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff },
 277                 .src.addr_bytes = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff },
 278                 .type = 0xffff,
 279         };
 280         const struct rte_flow_item_eth ifrm_supp_mask = {
 281                 .dst.addr_bytes = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff },
 282         };
 283         const uint8_t ig_mask[EFX_MAC_ADDR_LEN] = {
 284                 0x01, 0x00, 0x00, 0x00, 0x00, 0x00
 285         };
 286         const struct rte_flow_item_eth *supp_mask_p;
 287         const struct rte_flow_item_eth *def_mask_p;
 288         uint8_t *loc_mac = NULL;
 289         boolean_t is_ifrm = (efx_spec->efs_encap_type !=
 290                 EFX_TUNNEL_PROTOCOL_NONE);
 291
 292         if (is_ifrm) {
 293                 supp_mask_p = &ifrm_supp_mask;
 294                 def_mask_p = &ifrm_supp_mask;
 295                 loc_mac = efx_spec->efs_ifrm_loc_mac;
 296         } else {
 297                 supp_mask_p = &supp_mask;
 298                 def_mask_p = &rte_flow_item_eth_mask;
 299                 loc_mac = efx_spec->efs_loc_mac;
 300         }
 301
 302         rc = sfc_flow_parse_init(item,
 303                                  (const void **)&spec,
 304                                  (const void **)&mask,
 305                                  supp_mask_p, def_mask_p,
 306                                  sizeof(struct rte_flow_item_eth),
 307                                  error);
 308         if (rc != 0)
 309                 return rc;
 310
 311         /* If "spec" is not set, could be any Ethernet */
 312         if (spec == NULL)
 313                 return 0;
 314
 315         if (rte_is_same_ether_addr(&mask->dst, &supp_mask.dst)) {
 316                 efx_spec->efs_match_flags |= is_ifrm ?
 317                         EFX_FILTER_MATCH_IFRM_LOC_MAC :
 318                         EFX_FILTER_MATCH_LOC_MAC;
 319                 rte_memcpy(loc_mac, spec->dst.addr_bytes,
 320                            EFX_MAC_ADDR_LEN);
 321         } else if (memcmp(mask->dst.addr_bytes, ig_mask,
 322                           EFX_MAC_ADDR_LEN) == 0) {
 323                 if (rte_is_unicast_ether_addr(&spec->dst))
 324                         efx_spec->efs_match_flags |= is_ifrm ?
 325                                 EFX_FILTER_MATCH_IFRM_UNKNOWN_UCAST_DST :
 326                                 EFX_FILTER_MATCH_UNKNOWN_UCAST_DST;
 327                 else
 328                         efx_spec->efs_match_flags |= is_ifrm ?
 329                                 EFX_FILTER_MATCH_IFRM_UNKNOWN_MCAST_DST :
 330                                 EFX_FILTER_MATCH_UNKNOWN_MCAST_DST;
 331         } else if (!rte_is_zero_ether_addr(&mask->dst)) {
 332                 goto fail_bad_mask;
 333         }
 334
 335         /*
 336          * ifrm_supp_mask ensures that the source address and
 337          * ethertype masks are equal to zero in inner frame,
 338          * so these fields are filled in only for the outer frame
 339          */
 340         if (rte_is_same_ether_addr(&mask->src, &supp_mask.src)) {
 341                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_REM_MAC;
 342                 rte_memcpy(efx_spec->efs_rem_mac, spec->src.addr_bytes,
 343                            EFX_MAC_ADDR_LEN);
 344         } else if (!rte_is_zero_ether_addr(&mask->src)) {
 345                 goto fail_bad_mask;
 346         }
 347
 348         /*
 349          * Ether type is in big-endian byte order in item and
 350          * in little-endian in efx_spec, so byte swap is used
 351          */
 352         if (mask->type == supp_mask.type) {
 353                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_ETHER_TYPE;
 354                 efx_spec->efs_ether_type = rte_bswap16(spec->type);
 355         } else if (mask->type != 0) {
 356                 goto fail_bad_mask;
 357         }
 358
 359         return 0;
 360
 361 fail_bad_mask:
 362         rte_flow_error_set(error, EINVAL,
 363                            RTE_FLOW_ERROR_TYPE_ITEM, item,
 364                            "Bad mask in the ETH pattern item");
 365         return -rte_errno;
 366 }
 367
 368 /**
 369  * Convert VLAN item to EFX filter specification.
 370  *
 371  * @param item[in]
 372  *   Item specification. Only VID field is supported.
 373  *   The mask can not be NULL. Ranging is not supported.
 374  * @param efx_spec[in, out]
 375  *   EFX filter specification to update.
 376  * @param[out] error
 377  *   Perform verbose error reporting if not NULL.
 378  */
 379 static int
 380 sfc_flow_parse_vlan(const struct rte_flow_item *item,
 381                     struct sfc_flow_parse_ctx *parse_ctx,
 382                     struct rte_flow_error *error)
 383 {
 384         int rc;
 385         uint16_t vid;
 386         efx_filter_spec_t *efx_spec = parse_ctx->filter;
 387         const struct rte_flow_item_vlan *spec = NULL;
 388         const struct rte_flow_item_vlan *mask = NULL;
 389         const struct rte_flow_item_vlan supp_mask = {
 390                 .tci = rte_cpu_to_be_16(ETH_VLAN_ID_MAX),
 391                 .inner_type = RTE_BE16(0xffff),
 392         };
 393
 394         rc = sfc_flow_parse_init(item,
 395                                  (const void **)&spec,
 396                                  (const void **)&mask,
 397                                  &supp_mask,
 398                                  NULL,
 399                                  sizeof(struct rte_flow_item_vlan),
 400                                  error);
 401         if (rc != 0)
 402                 return rc;
 403
 404         /*
 405          * VID is in big-endian byte order in item and
 406          * in little-endian in efx_spec, so byte swap is used.
 407          * If two VLAN items are included, the first matches
 408          * the outer tag and the next matches the inner tag.
 409          */
 410         if (mask->tci == supp_mask.tci) {
 411                 /* Apply mask to keep VID only */
 412                 vid = rte_bswap16(spec->tci & mask->tci);
 413
 414                 if (!(efx_spec->efs_match_flags &
 415                       EFX_FILTER_MATCH_OUTER_VID)) {
 416                         efx_spec->efs_match_flags |= EFX_FILTER_MATCH_OUTER_VID;
 417                         efx_spec->efs_outer_vid = vid;
 418                 } else if (!(efx_spec->efs_match_flags &
 419                              EFX_FILTER_MATCH_INNER_VID)) {
 420                         efx_spec->efs_match_flags |= EFX_FILTER_MATCH_INNER_VID;
 421                         efx_spec->efs_inner_vid = vid;
 422                 } else {
 423                         rte_flow_error_set(error, EINVAL,
 424                                            RTE_FLOW_ERROR_TYPE_ITEM, item,
 425                                            "More than two VLAN items");
 426                         return -rte_errno;
 427                 }
 428         } else {
 429                 rte_flow_error_set(error, EINVAL,
 430                                    RTE_FLOW_ERROR_TYPE_ITEM, item,
 431                                    "VLAN ID in TCI match is required");
 432                 return -rte_errno;
 433         }
 434
 435         if (efx_spec->efs_match_flags & EFX_FILTER_MATCH_ETHER_TYPE) {
 436                 rte_flow_error_set(error, EINVAL,
 437                                    RTE_FLOW_ERROR_TYPE_ITEM, item,
 438                                    "VLAN TPID matching is not supported");
 439                 return -rte_errno;
 440         }
 441         if (mask->inner_type == supp_mask.inner_type) {
 442                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_ETHER_TYPE;
 443                 efx_spec->efs_ether_type = rte_bswap16(spec->inner_type);
 444         } else if (mask->inner_type) {
 445                 rte_flow_error_set(error, EINVAL,
 446                                    RTE_FLOW_ERROR_TYPE_ITEM, item,
 447                                    "Bad mask for VLAN inner_type");
 448                 return -rte_errno;
 449         }
 450
 451         return 0;
 452 }
 453
 454 /**
 455  * Convert IPv4 item to EFX filter specification.
 456  *
 457  * @param item[in]
 458  *   Item specification. Only source and destination addresses and
 459  *   protocol fields are supported. If the mask is NULL, default
 460  *   mask will be used. Ranging is not supported.
 461  * @param efx_spec[in, out]
 462  *   EFX filter specification to update.
 463  * @param[out] error
 464  *   Perform verbose error reporting if not NULL.
 465  */
 466 static int
 467 sfc_flow_parse_ipv4(const struct rte_flow_item *item,
 468                     struct sfc_flow_parse_ctx *parse_ctx,
 469                     struct rte_flow_error *error)
 470 {
 471         int rc;
 472         efx_filter_spec_t *efx_spec = parse_ctx->filter;
 473         const struct rte_flow_item_ipv4 *spec = NULL;
 474         const struct rte_flow_item_ipv4 *mask = NULL;
 475         const uint16_t ether_type_ipv4 = rte_cpu_to_le_16(EFX_ETHER_TYPE_IPV4);
 476         const struct rte_flow_item_ipv4 supp_mask = {
 477                 .hdr = {
 478                         .src_addr = 0xffffffff,
 479                         .dst_addr = 0xffffffff,
 480                         .next_proto_id = 0xff,
 481                 }
 482         };
 483
 484         rc = sfc_flow_parse_init(item,
 485                                  (const void **)&spec,
 486                                  (const void **)&mask,
 487                                  &supp_mask,
 488                                  &rte_flow_item_ipv4_mask,
 489                                  sizeof(struct rte_flow_item_ipv4),
 490                                  error);
 491         if (rc != 0)
 492                 return rc;
 493
 494         /*
 495          * Filtering by IPv4 source and destination addresses requires
 496          * the appropriate ETHER_TYPE in hardware filters
 497          */
 498         if (!(efx_spec->efs_match_flags & EFX_FILTER_MATCH_ETHER_TYPE)) {
 499                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_ETHER_TYPE;
 500                 efx_spec->efs_ether_type = ether_type_ipv4;
 501         } else if (efx_spec->efs_ether_type != ether_type_ipv4) {
 502                 rte_flow_error_set(error, EINVAL,
 503                         RTE_FLOW_ERROR_TYPE_ITEM, item,
 504                         "Ethertype in pattern with IPV4 item should be appropriate");
 505                 return -rte_errno;
 506         }
 507
 508         if (spec == NULL)
 509                 return 0;
 510
 511         /*
 512          * IPv4 addresses are in big-endian byte order in item and in
 513          * efx_spec
 514          */
 515         if (mask->hdr.src_addr == supp_mask.hdr.src_addr) {
 516                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_REM_HOST;
 517                 efx_spec->efs_rem_host.eo_u32[0] = spec->hdr.src_addr;
 518         } else if (mask->hdr.src_addr != 0) {
 519                 goto fail_bad_mask;
 520         }
 521
 522         if (mask->hdr.dst_addr == supp_mask.hdr.dst_addr) {
 523                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_LOC_HOST;
 524                 efx_spec->efs_loc_host.eo_u32[0] = spec->hdr.dst_addr;
 525         } else if (mask->hdr.dst_addr != 0) {
 526                 goto fail_bad_mask;
 527         }
 528
 529         if (mask->hdr.next_proto_id == supp_mask.hdr.next_proto_id) {
 530                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_IP_PROTO;
 531                 efx_spec->efs_ip_proto = spec->hdr.next_proto_id;
 532         } else if (mask->hdr.next_proto_id != 0) {
 533                 goto fail_bad_mask;
 534         }
 535
 536         return 0;
 537
 538 fail_bad_mask:
 539         rte_flow_error_set(error, EINVAL,
 540                            RTE_FLOW_ERROR_TYPE_ITEM, item,
 541                            "Bad mask in the IPV4 pattern item");
 542         return -rte_errno;
 543 }
 544
 545 /**
 546  * Convert IPv6 item to EFX filter specification.
 547  *
 548  * @param item[in]
 549  *   Item specification. Only source and destination addresses and
 550  *   next header fields are supported. If the mask is NULL, default
 551  *   mask will be used. Ranging is not supported.
 552  * @param efx_spec[in, out]
 553  *   EFX filter specification to update.
 554  * @param[out] error
 555  *   Perform verbose error reporting if not NULL.
 556  */
 557 static int
 558 sfc_flow_parse_ipv6(const struct rte_flow_item *item,
 559                     struct sfc_flow_parse_ctx *parse_ctx,
 560                     struct rte_flow_error *error)
 561 {
 562         int rc;
 563         efx_filter_spec_t *efx_spec = parse_ctx->filter;
 564         const struct rte_flow_item_ipv6 *spec = NULL;
 565         const struct rte_flow_item_ipv6 *mask = NULL;
 566         const uint16_t ether_type_ipv6 = rte_cpu_to_le_16(EFX_ETHER_TYPE_IPV6);
 567         const struct rte_flow_item_ipv6 supp_mask = {
 568                 .hdr = {
 569                         .src_addr = { 0xff, 0xff, 0xff, 0xff,
 570                                       0xff, 0xff, 0xff, 0xff,
 571                                       0xff, 0xff, 0xff, 0xff,
 572                                       0xff, 0xff, 0xff, 0xff },
 573                         .dst_addr = { 0xff, 0xff, 0xff, 0xff,
 574                                       0xff, 0xff, 0xff, 0xff,
 575                                       0xff, 0xff, 0xff, 0xff,
 576                                       0xff, 0xff, 0xff, 0xff },
 577                         .proto = 0xff,
 578                 }
 579         };
 580
 581         rc = sfc_flow_parse_init(item,
 582                                  (const void **)&spec,
 583                                  (const void **)&mask,
 584                                  &supp_mask,
 585                                  &rte_flow_item_ipv6_mask,
 586                                  sizeof(struct rte_flow_item_ipv6),
 587                                  error);
 588         if (rc != 0)
 589                 return rc;
 590
 591         /*
 592          * Filtering by IPv6 source and destination addresses requires
 593          * the appropriate ETHER_TYPE in hardware filters
 594          */
 595         if (!(efx_spec->efs_match_flags & EFX_FILTER_MATCH_ETHER_TYPE)) {
 596                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_ETHER_TYPE;
 597                 efx_spec->efs_ether_type = ether_type_ipv6;
 598         } else if (efx_spec->efs_ether_type != ether_type_ipv6) {
 599                 rte_flow_error_set(error, EINVAL,
 600                         RTE_FLOW_ERROR_TYPE_ITEM, item,
 601                         "Ethertype in pattern with IPV6 item should be appropriate");
 602                 return -rte_errno;
 603         }
 604
 605         if (spec == NULL)
 606                 return 0;
 607
 608         /*
 609          * IPv6 addresses are in big-endian byte order in item and in
 610          * efx_spec
 611          */
 612         if (memcmp(mask->hdr.src_addr, supp_mask.hdr.src_addr,
 613                    sizeof(mask->hdr.src_addr)) == 0) {
 614                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_REM_HOST;
 615
 616                 RTE_BUILD_BUG_ON(sizeof(efx_spec->efs_rem_host) !=
 617                                  sizeof(spec->hdr.src_addr));
 618                 rte_memcpy(&efx_spec->efs_rem_host, spec->hdr.src_addr,
 619                            sizeof(efx_spec->efs_rem_host));
 620         } else if (!sfc_flow_is_zero(mask->hdr.src_addr,
 621                                      sizeof(mask->hdr.src_addr))) {
 622                 goto fail_bad_mask;
 623         }
 624
 625         if (memcmp(mask->hdr.dst_addr, supp_mask.hdr.dst_addr,
 626                    sizeof(mask->hdr.dst_addr)) == 0) {
 627                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_LOC_HOST;
 628
 629                 RTE_BUILD_BUG_ON(sizeof(efx_spec->efs_loc_host) !=
 630                                  sizeof(spec->hdr.dst_addr));
 631                 rte_memcpy(&efx_spec->efs_loc_host, spec->hdr.dst_addr,
 632                            sizeof(efx_spec->efs_loc_host));
 633         } else if (!sfc_flow_is_zero(mask->hdr.dst_addr,
 634                                      sizeof(mask->hdr.dst_addr))) {
 635                 goto fail_bad_mask;
 636         }
 637
 638         if (mask->hdr.proto == supp_mask.hdr.proto) {
 639                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_IP_PROTO;
 640                 efx_spec->efs_ip_proto = spec->hdr.proto;
 641         } else if (mask->hdr.proto != 0) {
 642                 goto fail_bad_mask;
 643         }
 644
 645         return 0;
 646
 647 fail_bad_mask:
 648         rte_flow_error_set(error, EINVAL,
 649                            RTE_FLOW_ERROR_TYPE_ITEM, item,
 650                            "Bad mask in the IPV6 pattern item");
 651         return -rte_errno;
 652 }
 653
 654 /**
 655  * Convert TCP item to EFX filter specification.
 656  *
 657  * @param item[in]
 658  *   Item specification. Only source and destination ports fields
 659  *   are supported. If the mask is NULL, default mask will be used.
 660  *   Ranging is not supported.
 661  * @param efx_spec[in, out]
 662  *   EFX filter specification to update.
 663  * @param[out] error
 664  *   Perform verbose error reporting if not NULL.
 665  */
 666 static int
 667 sfc_flow_parse_tcp(const struct rte_flow_item *item,
 668                    struct sfc_flow_parse_ctx *parse_ctx,
 669                    struct rte_flow_error *error)
 670 {
 671         int rc;
 672         efx_filter_spec_t *efx_spec = parse_ctx->filter;
 673         const struct rte_flow_item_tcp *spec = NULL;
 674         const struct rte_flow_item_tcp *mask = NULL;
 675         const struct rte_flow_item_tcp supp_mask = {
 676                 .hdr = {
 677                         .src_port = 0xffff,
 678                         .dst_port = 0xffff,
 679                 }
 680         };
 681
 682         rc = sfc_flow_parse_init(item,
 683                                  (const void **)&spec,
 684                                  (const void **)&mask,
 685                                  &supp_mask,
 686                                  &rte_flow_item_tcp_mask,
 687                                  sizeof(struct rte_flow_item_tcp),
 688                                  error);
 689         if (rc != 0)
 690                 return rc;
 691
 692         /*
 693          * Filtering by TCP source and destination ports requires
 694          * the appropriate IP_PROTO in hardware filters
 695          */
 696         if (!(efx_spec->efs_match_flags & EFX_FILTER_MATCH_IP_PROTO)) {
 697                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_IP_PROTO;
 698                 efx_spec->efs_ip_proto = EFX_IPPROTO_TCP;
 699         } else if (efx_spec->efs_ip_proto != EFX_IPPROTO_TCP) {
 700                 rte_flow_error_set(error, EINVAL,
 701                         RTE_FLOW_ERROR_TYPE_ITEM, item,
 702                         "IP proto in pattern with TCP item should be appropriate");
 703                 return -rte_errno;
 704         }
 705
 706         if (spec == NULL)
 707                 return 0;
 708
 709         /*
 710          * Source and destination ports are in big-endian byte order in item and
 711          * in little-endian in efx_spec, so byte swap is used
 712          */
 713         if (mask->hdr.src_port == supp_mask.hdr.src_port) {
 714                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_REM_PORT;
 715                 efx_spec->efs_rem_port = rte_bswap16(spec->hdr.src_port);
 716         } else if (mask->hdr.src_port != 0) {
 717                 goto fail_bad_mask;
 718         }
 719
 720         if (mask->hdr.dst_port == supp_mask.hdr.dst_port) {
 721                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_LOC_PORT;
 722                 efx_spec->efs_loc_port = rte_bswap16(spec->hdr.dst_port);
 723         } else if (mask->hdr.dst_port != 0) {
 724                 goto fail_bad_mask;
 725         }
 726
 727         return 0;
 728
 729 fail_bad_mask:
 730         rte_flow_error_set(error, EINVAL,
 731                            RTE_FLOW_ERROR_TYPE_ITEM, item,
 732                            "Bad mask in the TCP pattern item");
 733         return -rte_errno;
 734 }
 735
 736 /**
 737  * Convert UDP item to EFX filter specification.
 738  *
 739  * @param item[in]
 740  *   Item specification. Only source and destination ports fields
 741  *   are supported. If the mask is NULL, default mask will be used.
 742  *   Ranging is not supported.
 743  * @param efx_spec[in, out]
 744  *   EFX filter specification to update.
 745  * @param[out] error
 746  *   Perform verbose error reporting if not NULL.
 747  */
 748 static int
 749 sfc_flow_parse_udp(const struct rte_flow_item *item,
 750                    struct sfc_flow_parse_ctx *parse_ctx,
 751                    struct rte_flow_error *error)
 752 {
 753         int rc;
 754         efx_filter_spec_t *efx_spec = parse_ctx->filter;
 755         const struct rte_flow_item_udp *spec = NULL;
 756         const struct rte_flow_item_udp *mask = NULL;
 757         const struct rte_flow_item_udp supp_mask = {
 758                 .hdr = {
 759                         .src_port = 0xffff,
 760                         .dst_port = 0xffff,
 761                 }
 762         };
 763
 764         rc = sfc_flow_parse_init(item,
 765                                  (const void **)&spec,
 766                                  (const void **)&mask,
 767                                  &supp_mask,
 768                                  &rte_flow_item_udp_mask,
 769                                  sizeof(struct rte_flow_item_udp),
 770                                  error);
 771         if (rc != 0)
 772                 return rc;
 773
 774         /*
 775          * Filtering by UDP source and destination ports requires
 776          * the appropriate IP_PROTO in hardware filters
 777          */
 778         if (!(efx_spec->efs_match_flags & EFX_FILTER_MATCH_IP_PROTO)) {
 779                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_IP_PROTO;
 780                 efx_spec->efs_ip_proto = EFX_IPPROTO_UDP;
 781         } else if (efx_spec->efs_ip_proto != EFX_IPPROTO_UDP) {
 782                 rte_flow_error_set(error, EINVAL,
 783                         RTE_FLOW_ERROR_TYPE_ITEM, item,
 784                         "IP proto in pattern with UDP item should be appropriate");
 785                 return -rte_errno;
 786         }
 787
 788         if (spec == NULL)
 789                 return 0;
 790
 791         /*
 792          * Source and destination ports are in big-endian byte order in item and
 793          * in little-endian in efx_spec, so byte swap is used
 794          */
 795         if (mask->hdr.src_port == supp_mask.hdr.src_port) {
 796                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_REM_PORT;
 797                 efx_spec->efs_rem_port = rte_bswap16(spec->hdr.src_port);
 798         } else if (mask->hdr.src_port != 0) {
 799                 goto fail_bad_mask;
 800         }
 801
 802         if (mask->hdr.dst_port == supp_mask.hdr.dst_port) {
 803                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_LOC_PORT;
 804                 efx_spec->efs_loc_port = rte_bswap16(spec->hdr.dst_port);
 805         } else if (mask->hdr.dst_port != 0) {
 806                 goto fail_bad_mask;
 807         }
 808
 809         return 0;
 810
 811 fail_bad_mask:
 812         rte_flow_error_set(error, EINVAL,
 813                            RTE_FLOW_ERROR_TYPE_ITEM, item,
 814                            "Bad mask in the UDP pattern item");
 815         return -rte_errno;
 816 }
 817
 818 /*
 819  * Filters for encapsulated packets match based on the EtherType and IP
 820  * protocol in the outer frame.
 821  */
 822 static int
 823 sfc_flow_set_match_flags_for_encap_pkts(const struct rte_flow_item *item,
 824                                         efx_filter_spec_t *efx_spec,
 825                                         uint8_t ip_proto,
 826                                         struct rte_flow_error *error)
 827 {
 828         if (!(efx_spec->efs_match_flags & EFX_FILTER_MATCH_IP_PROTO)) {
 829                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_IP_PROTO;
 830                 efx_spec->efs_ip_proto = ip_proto;
 831         } else if (efx_spec->efs_ip_proto != ip_proto) {
 832                 switch (ip_proto) {
 833                 case EFX_IPPROTO_UDP:
 834                         rte_flow_error_set(error, EINVAL,
 835                                 RTE_FLOW_ERROR_TYPE_ITEM, item,
 836                                 "Outer IP header protocol must be UDP "
 837                                 "in VxLAN/GENEVE pattern");
 838                         return -rte_errno;
 839
 840                 case EFX_IPPROTO_GRE:
 841                         rte_flow_error_set(error, EINVAL,
 842                                 RTE_FLOW_ERROR_TYPE_ITEM, item,
 843                                 "Outer IP header protocol must be GRE "
 844                                 "in NVGRE pattern");
 845                         return -rte_errno;
 846
 847                 default:
 848                         rte_flow_error_set(error, EINVAL,
 849                                 RTE_FLOW_ERROR_TYPE_ITEM, item,
 850                                 "Only VxLAN/GENEVE/NVGRE tunneling patterns "
 851                                 "are supported");
 852                         return -rte_errno;
 853                 }
 854         }
 855
 856         if (efx_spec->efs_match_flags & EFX_FILTER_MATCH_ETHER_TYPE &&
 857             efx_spec->efs_ether_type != EFX_ETHER_TYPE_IPV4 &&
 858             efx_spec->efs_ether_type != EFX_ETHER_TYPE_IPV6) {
 859                 rte_flow_error_set(error, EINVAL,
 860                         RTE_FLOW_ERROR_TYPE_ITEM, item,
 861                         "Outer frame EtherType in pattern with tunneling "
 862                         "must be IPv4 or IPv6");
 863                 return -rte_errno;
 864         }
 865
 866         return 0;
 867 }
 868
 869 static int
 870 sfc_flow_set_efx_spec_vni_or_vsid(efx_filter_spec_t *efx_spec,
 871                                   const uint8_t *vni_or_vsid_val,
 872                                   const uint8_t *vni_or_vsid_mask,
 873                                   const struct rte_flow_item *item,
 874                                   struct rte_flow_error *error)
 875 {
 876         const uint8_t vni_or_vsid_full_mask[EFX_VNI_OR_VSID_LEN] = {
 877                 0xff, 0xff, 0xff
 878         };
 879
 880         if (memcmp(vni_or_vsid_mask, vni_or_vsid_full_mask,
 881                    EFX_VNI_OR_VSID_LEN) == 0) {
 882                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_VNI_OR_VSID;
 883                 rte_memcpy(efx_spec->efs_vni_or_vsid, vni_or_vsid_val,
 884                            EFX_VNI_OR_VSID_LEN);
 885         } else if (!sfc_flow_is_zero(vni_or_vsid_mask, EFX_VNI_OR_VSID_LEN)) {
 886                 rte_flow_error_set(error, EINVAL,
 887                                    RTE_FLOW_ERROR_TYPE_ITEM, item,
 888                                    "Unsupported VNI/VSID mask");
 889                 return -rte_errno;
 890         }
 891
 892         return 0;
 893 }
 894
 895 /**
 896  * Convert VXLAN item to EFX filter specification.
 897  *
 898  * @param item[in]
 899  *   Item specification. Only VXLAN network identifier field is supported.
 900  *   If the mask is NULL, default mask will be used.
 901  *   Ranging is not supported.
 902  * @param efx_spec[in, out]
 903  *   EFX filter specification to update.
 904  * @param[out] error
 905  *   Perform verbose error reporting if not NULL.
 906  */
 907 static int
 908 sfc_flow_parse_vxlan(const struct rte_flow_item *item,
 909                      struct sfc_flow_parse_ctx *parse_ctx,
 910                      struct rte_flow_error *error)
 911 {
 912         int rc;
 913         efx_filter_spec_t *efx_spec = parse_ctx->filter;
 914         const struct rte_flow_item_vxlan *spec = NULL;
 915         const struct rte_flow_item_vxlan *mask = NULL;
 916         const struct rte_flow_item_vxlan supp_mask = {
 917                 .vni = { 0xff, 0xff, 0xff }
 918         };
 919
 920         rc = sfc_flow_parse_init(item,
 921                                  (const void **)&spec,
 922                                  (const void **)&mask,
 923                                  &supp_mask,
 924                                  &rte_flow_item_vxlan_mask,
 925                                  sizeof(struct rte_flow_item_vxlan),
 926                                  error);
 927         if (rc != 0)
 928                 return rc;
 929
 930         rc = sfc_flow_set_match_flags_for_encap_pkts(item, efx_spec,
 931                                                      EFX_IPPROTO_UDP, error);
 932         if (rc != 0)
 933                 return rc;
 934
 935         efx_spec->efs_encap_type = EFX_TUNNEL_PROTOCOL_VXLAN;
 936         efx_spec->efs_match_flags |= EFX_FILTER_MATCH_ENCAP_TYPE;
 937
 938         if (spec == NULL)
 939                 return 0;
 940
 941         rc = sfc_flow_set_efx_spec_vni_or_vsid(efx_spec, spec->vni,
 942                                                mask->vni, item, error);
 943
 944         return rc;
 945 }
 946
 947 /**
 948  * Convert GENEVE item to EFX filter specification.
 949  *
 950  * @param item[in]
 951  *   Item specification. Only Virtual Network Identifier and protocol type
 952  *   fields are supported. But protocol type can be only Ethernet (0x6558).
 953  *   If the mask is NULL, default mask will be used.
 954  *   Ranging is not supported.
 955  * @param efx_spec[in, out]
 956  *   EFX filter specification to update.
 957  * @param[out] error
 958  *   Perform verbose error reporting if not NULL.
 959  */
 960 static int
 961 sfc_flow_parse_geneve(const struct rte_flow_item *item,
 962                       struct sfc_flow_parse_ctx *parse_ctx,
 963                       struct rte_flow_error *error)
 964 {
 965         int rc;
 966         efx_filter_spec_t *efx_spec = parse_ctx->filter;
 967         const struct rte_flow_item_geneve *spec = NULL;
 968         const struct rte_flow_item_geneve *mask = NULL;
 969         const struct rte_flow_item_geneve supp_mask = {
 970                 .protocol = RTE_BE16(0xffff),
 971                 .vni = { 0xff, 0xff, 0xff }
 972         };
 973
 974         rc = sfc_flow_parse_init(item,
 975                                  (const void **)&spec,
 976                                  (const void **)&mask,
 977                                  &supp_mask,
 978                                  &rte_flow_item_geneve_mask,
 979                                  sizeof(struct rte_flow_item_geneve),
 980                                  error);
 981         if (rc != 0)
 982                 return rc;
 983
 984         rc = sfc_flow_set_match_flags_for_encap_pkts(item, efx_spec,
 985                                                      EFX_IPPROTO_UDP, error);
 986         if (rc != 0)
 987                 return rc;
 988
 989         efx_spec->efs_encap_type = EFX_TUNNEL_PROTOCOL_GENEVE;
 990         efx_spec->efs_match_flags |= EFX_FILTER_MATCH_ENCAP_TYPE;
 991
 992         if (spec == NULL)
 993                 return 0;
 994
 995         if (mask->protocol == supp_mask.protocol) {
 996                 if (spec->protocol != rte_cpu_to_be_16(RTE_ETHER_TYPE_TEB)) {
 997                         rte_flow_error_set(error, EINVAL,
 998                                 RTE_FLOW_ERROR_TYPE_ITEM, item,
 999                                 "GENEVE encap. protocol must be Ethernet "
1000                                 "(0x6558) in the GENEVE pattern item");
1001                         return -rte_errno;
1002                 }
1003         } else if (mask->protocol != 0) {
1004                 rte_flow_error_set(error, EINVAL,
1005                         RTE_FLOW_ERROR_TYPE_ITEM, item,
1006                         "Unsupported mask for GENEVE encap. protocol");
1007                 return -rte_errno;
1008         }
1009
1010         rc = sfc_flow_set_efx_spec_vni_or_vsid(efx_spec, spec->vni,
1011                                                mask->vni, item, error);
1012
1013         return rc;
1014 }
1015
1016 /**
1017  * Convert NVGRE item to EFX filter specification.
1018  *
1019  * @param item[in]
1020  *   Item specification. Only virtual subnet ID field is supported.
1021  *   If the mask is NULL, default mask will be used.
1022  *   Ranging is not supported.
1023  * @param efx_spec[in, out]
1024  *   EFX filter specification to update.
1025  * @param[out] error
1026  *   Perform verbose error reporting if not NULL.
1027  */
1028 static int
1029 sfc_flow_parse_nvgre(const struct rte_flow_item *item,
1030                      struct sfc_flow_parse_ctx *parse_ctx,
1031                      struct rte_flow_error *error)
1032 {
1033         int rc;
1034         efx_filter_spec_t *efx_spec = parse_ctx->filter;
1035         const struct rte_flow_item_nvgre *spec = NULL;
1036         const struct rte_flow_item_nvgre *mask = NULL;
1037         const struct rte_flow_item_nvgre supp_mask = {
1038                 .tni = { 0xff, 0xff, 0xff }
1039         };
1040
1041         rc = sfc_flow_parse_init(item,
1042                                  (const void **)&spec,
1043                                  (const void **)&mask,
1044                                  &supp_mask,
1045                                  &rte_flow_item_nvgre_mask,
1046                                  sizeof(struct rte_flow_item_nvgre),
1047                                  error);
1048         if (rc != 0)
1049                 return rc;
1050
1051         rc = sfc_flow_set_match_flags_for_encap_pkts(item, efx_spec,
1052                                                      EFX_IPPROTO_GRE, error);
1053         if (rc != 0)
1054                 return rc;
1055
1056         efx_spec->efs_encap_type = EFX_TUNNEL_PROTOCOL_NVGRE;
1057         efx_spec->efs_match_flags |= EFX_FILTER_MATCH_ENCAP_TYPE;
1058
1059         if (spec == NULL)
1060                 return 0;
1061
1062         rc = sfc_flow_set_efx_spec_vni_or_vsid(efx_spec, spec->tni,
1063                                                mask->tni, item, error);
1064
1065         return rc;
1066 }
1067
1068 /**
1069  * Convert PPPoEx item to EFX filter specification.
1070  *
1071  * @param item[in]
1072  *   Item specification.
1073  *   Matching on PPPoEx fields is not supported.
1074  *   This item can only be used to set or validate the EtherType filter.
1075  *   Only zero masks are allowed.
1076  *   Ranging is not supported.
1077  * @param efx_spec[in, out]
1078  *   EFX filter specification to update.
1079  * @param[out] error
1080  *   Perform verbose error reporting if not NULL.
1081  */
1082 static int
1083 sfc_flow_parse_pppoex(const struct rte_flow_item *item,
1084                       struct sfc_flow_parse_ctx *parse_ctx,
1085                       struct rte_flow_error *error)
1086 {
1087         efx_filter_spec_t *efx_spec = parse_ctx->filter;
1088         const struct rte_flow_item_pppoe *spec = NULL;
1089         const struct rte_flow_item_pppoe *mask = NULL;
1090         const struct rte_flow_item_pppoe supp_mask = {};
1091         const struct rte_flow_item_pppoe def_mask = {};
1092         uint16_t ether_type;
1093         int rc;
1094
1095         rc = sfc_flow_parse_init(item,
1096                                  (const void **)&spec,
1097                                  (const void **)&mask,
1098                                  &supp_mask,
1099                                  &def_mask,
1100                                  sizeof(struct rte_flow_item_pppoe),
1101                                  error);
1102         if (rc != 0)
1103                 return rc;
1104
1105         if (item->type == RTE_FLOW_ITEM_TYPE_PPPOED)
1106                 ether_type = RTE_ETHER_TYPE_PPPOE_DISCOVERY;
1107         else
1108                 ether_type = RTE_ETHER_TYPE_PPPOE_SESSION;
1109
1110         if ((efx_spec->efs_match_flags & EFX_FILTER_MATCH_ETHER_TYPE) != 0) {
1111                 if (efx_spec->efs_ether_type != ether_type) {
1112                         rte_flow_error_set(error, EINVAL,
1113                                            RTE_FLOW_ERROR_TYPE_ITEM, item,
1114                                            "Invalid EtherType for a PPPoE flow item");
1115                         return -rte_errno;
1116                 }
1117         } else {
1118                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_ETHER_TYPE;
1119                 efx_spec->efs_ether_type = ether_type;
1120         }
1121
1122         return 0;
1123 }
1124
1125 static const struct sfc_flow_item sfc_flow_items[] = {
1126         {
1127                 .type = RTE_FLOW_ITEM_TYPE_VOID,
1128                 .prev_layer = SFC_FLOW_ITEM_ANY_LAYER,
1129                 .layer = SFC_FLOW_ITEM_ANY_LAYER,
1130                 .ctx_type = SFC_FLOW_PARSE_CTX_FILTER,
1131                 .parse = sfc_flow_parse_void,
1132         },
1133         {
1134                 .type = RTE_FLOW_ITEM_TYPE_ETH,
1135                 .prev_layer = SFC_FLOW_ITEM_START_LAYER,
1136                 .layer = SFC_FLOW_ITEM_L2,
1137                 .ctx_type = SFC_FLOW_PARSE_CTX_FILTER,
1138                 .parse = sfc_flow_parse_eth,
1139         },
1140         {
1141                 .type = RTE_FLOW_ITEM_TYPE_VLAN,
1142                 .prev_layer = SFC_FLOW_ITEM_L2,
1143                 .layer = SFC_FLOW_ITEM_L2,
1144                 .ctx_type = SFC_FLOW_PARSE_CTX_FILTER,
1145                 .parse = sfc_flow_parse_vlan,
1146         },
1147         {
1148                 .type = RTE_FLOW_ITEM_TYPE_PPPOED,
1149                 .prev_layer = SFC_FLOW_ITEM_L2,
1150                 .layer = SFC_FLOW_ITEM_L2,
1151                 .ctx_type = SFC_FLOW_PARSE_CTX_FILTER,
1152                 .parse = sfc_flow_parse_pppoex,
1153         },
1154         {
1155                 .type = RTE_FLOW_ITEM_TYPE_PPPOES,
1156                 .prev_layer = SFC_FLOW_ITEM_L2,
1157                 .layer = SFC_FLOW_ITEM_L2,
1158                 .ctx_type = SFC_FLOW_PARSE_CTX_FILTER,
1159                 .parse = sfc_flow_parse_pppoex,
1160         },
1161         {
1162                 .type = RTE_FLOW_ITEM_TYPE_IPV4,
1163                 .prev_layer = SFC_FLOW_ITEM_L2,
1164                 .layer = SFC_FLOW_ITEM_L3,
1165                 .ctx_type = SFC_FLOW_PARSE_CTX_FILTER,
1166                 .parse = sfc_flow_parse_ipv4,
1167         },
1168         {
1169                 .type = RTE_FLOW_ITEM_TYPE_IPV6,
1170                 .prev_layer = SFC_FLOW_ITEM_L2,
1171                 .layer = SFC_FLOW_ITEM_L3,
1172                 .ctx_type = SFC_FLOW_PARSE_CTX_FILTER,
1173                 .parse = sfc_flow_parse_ipv6,
1174         },
1175         {
1176                 .type = RTE_FLOW_ITEM_TYPE_TCP,
1177                 .prev_layer = SFC_FLOW_ITEM_L3,
1178                 .layer = SFC_FLOW_ITEM_L4,
1179                 .ctx_type = SFC_FLOW_PARSE_CTX_FILTER,
1180                 .parse = sfc_flow_parse_tcp,
1181         },
1182         {
1183                 .type = RTE_FLOW_ITEM_TYPE_UDP,
1184                 .prev_layer = SFC_FLOW_ITEM_L3,
1185                 .layer = SFC_FLOW_ITEM_L4,
1186                 .ctx_type = SFC_FLOW_PARSE_CTX_FILTER,
1187                 .parse = sfc_flow_parse_udp,
1188         },
1189         {
1190                 .type = RTE_FLOW_ITEM_TYPE_VXLAN,
1191                 .prev_layer = SFC_FLOW_ITEM_L4,
1192                 .layer = SFC_FLOW_ITEM_START_LAYER,
1193                 .ctx_type = SFC_FLOW_PARSE_CTX_FILTER,
1194                 .parse = sfc_flow_parse_vxlan,
1195         },
1196         {
1197                 .type = RTE_FLOW_ITEM_TYPE_GENEVE,
1198                 .prev_layer = SFC_FLOW_ITEM_L4,
1199                 .layer = SFC_FLOW_ITEM_START_LAYER,
1200                 .ctx_type = SFC_FLOW_PARSE_CTX_FILTER,
1201                 .parse = sfc_flow_parse_geneve,
1202         },
1203         {
1204                 .type = RTE_FLOW_ITEM_TYPE_NVGRE,
1205                 .prev_layer = SFC_FLOW_ITEM_L3,
1206                 .layer = SFC_FLOW_ITEM_START_LAYER,
1207                 .ctx_type = SFC_FLOW_PARSE_CTX_FILTER,
1208                 .parse = sfc_flow_parse_nvgre,
1209         },
1210 };
1211
1212 /*
1213  * Protocol-independent flow API support
1214  */
1215 static int
1216 sfc_flow_parse_attr(struct sfc_adapter *sa,
1217                     const struct rte_flow_attr *attr,
1218                     struct rte_flow *flow,
1219                     struct rte_flow_error *error)
1220 {
1221         struct sfc_flow_spec *spec = &flow->spec;
1222         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
1223         struct sfc_flow_spec_mae *spec_mae = &spec->mae;
1224         struct sfc_mae *mae = &sa->mae;
1225
1226         if (attr == NULL) {
1227                 rte_flow_error_set(error, EINVAL,
1228                                    RTE_FLOW_ERROR_TYPE_ATTR, NULL,
1229                                    "NULL attribute");
1230                 return -rte_errno;
1231         }
1232         if (attr->group != 0) {
1233                 rte_flow_error_set(error, ENOTSUP,
1234                                    RTE_FLOW_ERROR_TYPE_ATTR_GROUP, attr,
1235                                    "Groups are not supported");
1236                 return -rte_errno;
1237         }
1238         if (attr->egress != 0) {
1239                 rte_flow_error_set(error, ENOTSUP,
1240                                    RTE_FLOW_ERROR_TYPE_ATTR_EGRESS, attr,
1241                                    "Egress is not supported");
1242                 return -rte_errno;
1243         }
1244         if (attr->ingress == 0) {
1245                 rte_flow_error_set(error, ENOTSUP,
1246                                    RTE_FLOW_ERROR_TYPE_ATTR_INGRESS, attr,
1247                                    "Ingress is compulsory");
1248                 return -rte_errno;
1249         }
1250         if (attr->transfer == 0) {
1251                 if (attr->priority != 0) {
1252                         rte_flow_error_set(error, ENOTSUP,
1253                                            RTE_FLOW_ERROR_TYPE_ATTR_PRIORITY,
1254                                            attr, "Priorities are unsupported");
1255                         return -rte_errno;
1256                 }
1257                 spec->type = SFC_FLOW_SPEC_FILTER;
1258                 spec_filter->template.efs_flags |= EFX_FILTER_FLAG_RX;
1259                 spec_filter->template.efs_rss_context = EFX_RSS_CONTEXT_DEFAULT;
1260                 spec_filter->template.efs_priority = EFX_FILTER_PRI_MANUAL;
1261         } else {
1262                 if (mae->status != SFC_MAE_STATUS_SUPPORTED) {
1263                         rte_flow_error_set(error, ENOTSUP,
1264                                            RTE_FLOW_ERROR_TYPE_ATTR_TRANSFER,
1265                                            attr, "Transfer is not supported");
1266                         return -rte_errno;
1267                 }
1268                 if (attr->priority > mae->nb_action_rule_prios_max) {
1269                         rte_flow_error_set(error, ENOTSUP,
1270                                            RTE_FLOW_ERROR_TYPE_ATTR_PRIORITY,
1271                                            attr, "Unsupported priority level");
1272                         return -rte_errno;
1273                 }
1274                 spec->type = SFC_FLOW_SPEC_MAE;
1275                 spec_mae->priority = attr->priority;
1276                 spec_mae->match_spec = NULL;
1277                 spec_mae->action_set = NULL;
1278                 spec_mae->rule_id.id = EFX_MAE_RSRC_ID_INVALID;
1279         }
1280
1281         return 0;
1282 }
1283
1284 /* Get item from array sfc_flow_items */
1285 static const struct sfc_flow_item *
1286 sfc_flow_get_item(const struct sfc_flow_item *items,
1287                   unsigned int nb_items,
1288                   enum rte_flow_item_type type)
1289 {
1290         unsigned int i;
1291
1292         for (i = 0; i < nb_items; i++)
1293                 if (items[i].type == type)
1294                         return &items[i];
1295
1296         return NULL;
1297 }
1298
1299 int
1300 sfc_flow_parse_pattern(const struct sfc_flow_item *flow_items,
1301                        unsigned int nb_flow_items,
1302                        const struct rte_flow_item pattern[],
1303                        struct sfc_flow_parse_ctx *parse_ctx,
1304                        struct rte_flow_error *error)
1305 {
1306         int rc;
1307         unsigned int prev_layer = SFC_FLOW_ITEM_ANY_LAYER;
1308         boolean_t is_ifrm = B_FALSE;
1309         const struct sfc_flow_item *item;
1310
1311         if (pattern == NULL) {
1312                 rte_flow_error_set(error, EINVAL,
1313                                    RTE_FLOW_ERROR_TYPE_ITEM_NUM, NULL,
1314                                    "NULL pattern");
1315                 return -rte_errno;
1316         }
1317
1318         for (; pattern->type != RTE_FLOW_ITEM_TYPE_END; pattern++) {
1319                 item = sfc_flow_get_item(flow_items, nb_flow_items,
1320                                          pattern->type);
1321                 if (item == NULL) {
1322                         rte_flow_error_set(error, ENOTSUP,
1323                                            RTE_FLOW_ERROR_TYPE_ITEM, pattern,
1324                                            "Unsupported pattern item");
1325                         return -rte_errno;
1326                 }
1327
1328                 /*
1329                  * Omitting one or several protocol layers at the beginning
1330                  * of pattern is supported
1331                  */
1332                 if (item->prev_layer != SFC_FLOW_ITEM_ANY_LAYER &&
1333                     prev_layer != SFC_FLOW_ITEM_ANY_LAYER &&
1334                     item->prev_layer != prev_layer) {
1335                         rte_flow_error_set(error, ENOTSUP,
1336                                            RTE_FLOW_ERROR_TYPE_ITEM, pattern,
1337                                            "Unexpected sequence of pattern items");
1338                         return -rte_errno;
1339                 }
1340
1341                 /*
1342                  * Allow only VOID and ETH pattern items in the inner frame.
1343                  * Also check that there is only one tunneling protocol.
1344                  */
1345                 switch (item->type) {
1346                 case RTE_FLOW_ITEM_TYPE_VOID:
1347                 case RTE_FLOW_ITEM_TYPE_ETH:
1348                         break;
1349
1350                 case RTE_FLOW_ITEM_TYPE_VXLAN:
1351                 case RTE_FLOW_ITEM_TYPE_GENEVE:
1352                 case RTE_FLOW_ITEM_TYPE_NVGRE:
1353                         if (is_ifrm) {
1354                                 rte_flow_error_set(error, EINVAL,
1355                                         RTE_FLOW_ERROR_TYPE_ITEM,
1356                                         pattern,
1357                                         "More than one tunneling protocol");
1358                                 return -rte_errno;
1359                         }
1360                         is_ifrm = B_TRUE;
1361                         break;
1362
1363                 default:
1364                         if (parse_ctx->type == SFC_FLOW_PARSE_CTX_FILTER &&
1365                             is_ifrm) {
1366                                 rte_flow_error_set(error, EINVAL,
1367                                         RTE_FLOW_ERROR_TYPE_ITEM,
1368                                         pattern,
1369                                         "There is an unsupported pattern item "
1370                                         "in the inner frame");
1371                                 return -rte_errno;
1372                         }
1373                         break;
1374                 }
1375
1376                 if (parse_ctx->type != item->ctx_type) {
1377                         rte_flow_error_set(error, EINVAL,
1378                                         RTE_FLOW_ERROR_TYPE_ITEM, pattern,
1379                                         "Parse context type mismatch");
1380                         return -rte_errno;
1381                 }
1382
1383                 rc = item->parse(pattern, parse_ctx, error);
1384                 if (rc != 0)
1385                         return rc;
1386
1387                 if (item->layer != SFC_FLOW_ITEM_ANY_LAYER)
1388                         prev_layer = item->layer;
1389         }
1390
1391         return 0;
1392 }
1393
1394 static int
1395 sfc_flow_parse_queue(struct sfc_adapter *sa,
1396                      const struct rte_flow_action_queue *queue,
1397                      struct rte_flow *flow)
1398 {
1399         struct sfc_flow_spec *spec = &flow->spec;
1400         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
1401         struct sfc_rxq *rxq;
1402         struct sfc_rxq_info *rxq_info;
1403
1404         if (queue->index >= sfc_sa2shared(sa)->ethdev_rxq_count)
1405                 return -EINVAL;
1406
1407         rxq = sfc_rxq_ctrl_by_ethdev_qid(sa, queue->index);
1408         spec_filter->template.efs_dmaq_id = (uint16_t)rxq->hw_index;
1409
1410         rxq_info = &sfc_sa2shared(sa)->rxq_info[queue->index];
1411         spec_filter->rss_hash_required = !!(rxq_info->rxq_flags &
1412                                             SFC_RXQ_FLAG_RSS_HASH);
1413
1414         return 0;
1415 }
1416
1417 static int
1418 sfc_flow_parse_rss(struct sfc_adapter *sa,
1419                    const struct rte_flow_action_rss *action_rss,
1420                    struct rte_flow *flow)
1421 {
1422         struct sfc_adapter_shared * const sas = sfc_sa2shared(sa);
1423         struct sfc_rss *rss = &sas->rss;
1424         sfc_ethdev_qid_t ethdev_qid;
1425         struct sfc_rxq *rxq;
1426         unsigned int rxq_hw_index_min;
1427         unsigned int rxq_hw_index_max;
1428         efx_rx_hash_type_t efx_hash_types;
1429         const uint8_t *rss_key;
1430         struct sfc_flow_spec *spec = &flow->spec;
1431         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
1432         struct sfc_flow_rss *sfc_rss_conf = &spec_filter->rss_conf;
1433         unsigned int i;
1434
1435         if (action_rss->queue_num == 0)
1436                 return -EINVAL;
1437
1438         ethdev_qid = sfc_sa2shared(sa)->ethdev_rxq_count - 1;
1439         rxq = sfc_rxq_ctrl_by_ethdev_qid(sa, ethdev_qid);
1440         rxq_hw_index_min = rxq->hw_index;
1441         rxq_hw_index_max = 0;
1442
1443         for (i = 0; i < action_rss->queue_num; ++i) {
1444                 ethdev_qid = action_rss->queue[i];
1445
1446                 if ((unsigned int)ethdev_qid >=
1447                     sfc_sa2shared(sa)->ethdev_rxq_count)
1448                         return -EINVAL;
1449
1450                 rxq = sfc_rxq_ctrl_by_ethdev_qid(sa, ethdev_qid);
1451
1452                 if (rxq->hw_index < rxq_hw_index_min)
1453                         rxq_hw_index_min = rxq->hw_index;
1454
1455                 if (rxq->hw_index > rxq_hw_index_max)
1456                         rxq_hw_index_max = rxq->hw_index;
1457         }
1458
1459         switch (action_rss->func) {
1460         case RTE_ETH_HASH_FUNCTION_DEFAULT:
1461         case RTE_ETH_HASH_FUNCTION_TOEPLITZ:
1462                 break;
1463         default:
1464                 return -EINVAL;
1465         }
1466
1467         if (action_rss->level)
1468                 return -EINVAL;
1469
1470         /*
1471          * Dummy RSS action with only one queue and no specific settings
1472          * for hash types and key does not require dedicated RSS context
1473          * and may be simplified to single queue action.
1474          */
1475         if (action_rss->queue_num == 1 && action_rss->types == 0 &&
1476             action_rss->key_len == 0) {
1477                 spec_filter->template.efs_dmaq_id = rxq_hw_index_min;
1478                 return 0;
1479         }
1480
1481         if (action_rss->types) {
1482                 int rc;
1483
1484                 rc = sfc_rx_hf_rte_to_efx(sa, action_rss->types,
1485                                           &efx_hash_types);
1486                 if (rc != 0)
1487                         return -rc;
1488         } else {
1489                 unsigned int i;
1490
1491                 efx_hash_types = 0;
1492                 for (i = 0; i < rss->hf_map_nb_entries; ++i)
1493                         efx_hash_types |= rss->hf_map[i].efx;
1494         }
1495
1496         if (action_rss->key_len) {
1497                 if (action_rss->key_len != sizeof(rss->key))
1498                         return -EINVAL;
1499
1500                 rss_key = action_rss->key;
1501         } else {
1502                 rss_key = rss->key;
1503         }
1504
1505         spec_filter->rss = B_TRUE;
1506
1507         sfc_rss_conf->rxq_hw_index_min = rxq_hw_index_min;
1508         sfc_rss_conf->rxq_hw_index_max = rxq_hw_index_max;
1509         sfc_rss_conf->rss_hash_types = efx_hash_types;
1510         rte_memcpy(sfc_rss_conf->rss_key, rss_key, sizeof(rss->key));
1511
1512         for (i = 0; i < RTE_DIM(sfc_rss_conf->rss_tbl); ++i) {
1513                 unsigned int nb_queues = action_rss->queue_num;
1514                 struct sfc_rxq *rxq;
1515
1516                 ethdev_qid = action_rss->queue[i % nb_queues];
1517                 rxq = sfc_rxq_ctrl_by_ethdev_qid(sa, ethdev_qid);
1518                 sfc_rss_conf->rss_tbl[i] = rxq->hw_index - rxq_hw_index_min;
1519         }
1520
1521         return 0;
1522 }
1523
1524 static int
1525 sfc_flow_spec_flush(struct sfc_adapter *sa, struct sfc_flow_spec *spec,
1526                     unsigned int filters_count)
1527 {
1528         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
1529         unsigned int i;
1530         int ret = 0;
1531
1532         for (i = 0; i < filters_count; i++) {
1533                 int rc;
1534
1535                 rc = efx_filter_remove(sa->nic, &spec_filter->filters[i]);
1536                 if (ret == 0 && rc != 0) {
1537                         sfc_err(sa, "failed to remove filter specification "
1538                                 "(rc = %d)", rc);
1539                         ret = rc;
1540                 }
1541         }
1542
1543         return ret;
1544 }
1545
1546 static int
1547 sfc_flow_spec_insert(struct sfc_adapter *sa, struct sfc_flow_spec *spec)
1548 {
1549         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
1550         unsigned int i;
1551         int rc = 0;
1552
1553         for (i = 0; i < spec_filter->count; i++) {
1554                 rc = efx_filter_insert(sa->nic, &spec_filter->filters[i]);
1555                 if (rc != 0) {
1556                         sfc_flow_spec_flush(sa, spec, i);
1557                         break;
1558                 }
1559         }
1560
1561         return rc;
1562 }
1563
1564 static int
1565 sfc_flow_spec_remove(struct sfc_adapter *sa, struct sfc_flow_spec *spec)
1566 {
1567         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
1568
1569         return sfc_flow_spec_flush(sa, spec, spec_filter->count);
1570 }
1571
1572 static int
1573 sfc_flow_filter_insert(struct sfc_adapter *sa,
1574                        struct rte_flow *flow)
1575 {
1576         struct sfc_adapter_shared * const sas = sfc_sa2shared(sa);
1577         struct sfc_rss *rss = &sas->rss;
1578         struct sfc_flow_spec_filter *spec_filter = &flow->spec.filter;
1579         struct sfc_flow_rss *flow_rss = &spec_filter->rss_conf;
1580         uint32_t efs_rss_context = EFX_RSS_CONTEXT_DEFAULT;
1581         boolean_t create_context;
1582         unsigned int i;
1583         int rc = 0;
1584
1585         create_context = spec_filter->rss || (spec_filter->rss_hash_required &&
1586                         rss->dummy_rss_context == EFX_RSS_CONTEXT_DEFAULT);
1587
1588         if (create_context) {
1589                 unsigned int rss_spread;
1590                 unsigned int rss_hash_types;
1591                 uint8_t *rss_key;
1592
1593                 if (spec_filter->rss) {
1594                         rss_spread = MIN(flow_rss->rxq_hw_index_max -
1595                                         flow_rss->rxq_hw_index_min + 1,
1596                                         EFX_MAXRSS);
1597                         rss_hash_types = flow_rss->rss_hash_types;
1598                         rss_key = flow_rss->rss_key;
1599                 } else {
1600                         /*
1601                          * Initialize dummy RSS context parameters to have
1602                          * valid RSS hash. Use default RSS hash function and
1603                          * key.
1604                          */
1605                         rss_spread = 1;
1606                         rss_hash_types = rss->hash_types;
1607                         rss_key = rss->key;
1608                 }
1609
1610                 rc = efx_rx_scale_context_alloc(sa->nic,
1611                                                 EFX_RX_SCALE_EXCLUSIVE,
1612                                                 rss_spread,
1613                                                 &efs_rss_context);
1614                 if (rc != 0)
1615                         goto fail_scale_context_alloc;
1616
1617                 rc = efx_rx_scale_mode_set(sa->nic, efs_rss_context,
1618                                            rss->hash_alg,
1619                                            rss_hash_types, B_TRUE);
1620                 if (rc != 0)
1621                         goto fail_scale_mode_set;
1622
1623                 rc = efx_rx_scale_key_set(sa->nic, efs_rss_context,
1624                                           rss_key, sizeof(rss->key));
1625                 if (rc != 0)
1626                         goto fail_scale_key_set;
1627         } else {
1628                 efs_rss_context = rss->dummy_rss_context;
1629         }
1630
1631         if (spec_filter->rss || spec_filter->rss_hash_required) {
1632                 /*
1633                  * At this point, fully elaborated filter specifications
1634                  * have been produced from the template. To make sure that
1635                  * RSS behaviour is consistent between them, set the same
1636                  * RSS context value everywhere.
1637                  */
1638                 for (i = 0; i < spec_filter->count; i++) {
1639                         efx_filter_spec_t *spec = &spec_filter->filters[i];
1640
1641                         spec->efs_rss_context = efs_rss_context;
1642                         spec->efs_flags |= EFX_FILTER_FLAG_RX_RSS;
1643                         if (spec_filter->rss)
1644                                 spec->efs_dmaq_id = flow_rss->rxq_hw_index_min;
1645                 }
1646         }
1647
1648         rc = sfc_flow_spec_insert(sa, &flow->spec);
1649         if (rc != 0)
1650                 goto fail_filter_insert;
1651
1652         if (create_context) {
1653                 unsigned int dummy_tbl[RTE_DIM(flow_rss->rss_tbl)] = {0};
1654                 unsigned int *tbl;
1655
1656                 tbl = spec_filter->rss ? flow_rss->rss_tbl : dummy_tbl;
1657
1658                 /*
1659                  * Scale table is set after filter insertion because
1660                  * the table entries are relative to the base RxQ ID
1661                  * and the latter is submitted to the HW by means of
1662                  * inserting a filter, so by the time of the request
1663                  * the HW knows all the information needed to verify
1664                  * the table entries, and the operation will succeed
1665                  */
1666                 rc = efx_rx_scale_tbl_set(sa->nic, efs_rss_context,
1667                                           tbl, RTE_DIM(flow_rss->rss_tbl));
1668                 if (rc != 0)
1669                         goto fail_scale_tbl_set;
1670
1671                 /* Remember created dummy RSS context */
1672                 if (!spec_filter->rss)
1673                         rss->dummy_rss_context = efs_rss_context;
1674         }
1675
1676         return 0;
1677
1678 fail_scale_tbl_set:
1679         sfc_flow_spec_remove(sa, &flow->spec);
1680
1681 fail_filter_insert:
1682 fail_scale_key_set:
1683 fail_scale_mode_set:
1684         if (create_context)
1685                 efx_rx_scale_context_free(sa->nic, efs_rss_context);
1686
1687 fail_scale_context_alloc:
1688         return rc;
1689 }
1690
1691 static int
1692 sfc_flow_filter_remove(struct sfc_adapter *sa,
1693                        struct rte_flow *flow)
1694 {
1695         struct sfc_flow_spec_filter *spec_filter = &flow->spec.filter;
1696         int rc = 0;
1697
1698         rc = sfc_flow_spec_remove(sa, &flow->spec);
1699         if (rc != 0)
1700                 return rc;
1701
1702         if (spec_filter->rss) {
1703                 /*
1704                  * All specifications for a given flow rule have the same RSS
1705                  * context, so that RSS context value is taken from the first
1706                  * filter specification
1707                  */
1708                 efx_filter_spec_t *spec = &spec_filter->filters[0];
1709
1710                 rc = efx_rx_scale_context_free(sa->nic, spec->efs_rss_context);
1711         }
1712
1713         return rc;
1714 }
1715
1716 static int
1717 sfc_flow_parse_mark(struct sfc_adapter *sa,
1718                     const struct rte_flow_action_mark *mark,
1719                     struct rte_flow *flow)
1720 {
1721         struct sfc_flow_spec *spec = &flow->spec;
1722         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
1723         const efx_nic_cfg_t *encp = efx_nic_cfg_get(sa->nic);
1724
1725         if (mark == NULL || mark->id > encp->enc_filter_action_mark_max)
1726                 return EINVAL;
1727
1728         spec_filter->template.efs_flags |= EFX_FILTER_FLAG_ACTION_MARK;
1729         spec_filter->template.efs_mark = mark->id;
1730
1731         return 0;
1732 }
1733
1734 static int
1735 sfc_flow_parse_actions(struct sfc_adapter *sa,
1736                        const struct rte_flow_action actions[],
1737                        struct rte_flow *flow,
1738                        struct rte_flow_error *error)
1739 {
1740         int rc;
1741         struct sfc_flow_spec *spec = &flow->spec;
1742         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
1743         const unsigned int dp_rx_features = sa->priv.dp_rx->features;
1744         uint32_t actions_set = 0;
1745         const uint32_t fate_actions_mask = (1UL << RTE_FLOW_ACTION_TYPE_QUEUE) |
1746                                            (1UL << RTE_FLOW_ACTION_TYPE_RSS) |
1747                                            (1UL << RTE_FLOW_ACTION_TYPE_DROP);
1748         const uint32_t mark_actions_mask = (1UL << RTE_FLOW_ACTION_TYPE_MARK) |
1749                                            (1UL << RTE_FLOW_ACTION_TYPE_FLAG);
1750
1751         if (actions == NULL) {
1752                 rte_flow_error_set(error, EINVAL,
1753                                    RTE_FLOW_ERROR_TYPE_ACTION_NUM, NULL,
1754                                    "NULL actions");
1755                 return -rte_errno;
1756         }
1757
1758         for (; actions->type != RTE_FLOW_ACTION_TYPE_END; actions++) {
1759                 switch (actions->type) {
1760                 case RTE_FLOW_ACTION_TYPE_VOID:
1761                         SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ACTION_TYPE_VOID,
1762                                                actions_set);
1763                         break;
1764
1765                 case RTE_FLOW_ACTION_TYPE_QUEUE:
1766                         SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ACTION_TYPE_QUEUE,
1767                                                actions_set);
1768                         if ((actions_set & fate_actions_mask) != 0)
1769                                 goto fail_fate_actions;
1770
1771                         rc = sfc_flow_parse_queue(sa, actions->conf, flow);
1772                         if (rc != 0) {
1773                                 rte_flow_error_set(error, EINVAL,
1774                                         RTE_FLOW_ERROR_TYPE_ACTION, actions,
1775                                         "Bad QUEUE action");
1776                                 return -rte_errno;
1777                         }
1778                         break;
1779
1780                 case RTE_FLOW_ACTION_TYPE_RSS:
1781                         SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ACTION_TYPE_RSS,
1782                                                actions_set);
1783                         if ((actions_set & fate_actions_mask) != 0)
1784                                 goto fail_fate_actions;
1785
1786                         rc = sfc_flow_parse_rss(sa, actions->conf, flow);
1787                         if (rc != 0) {
1788                                 rte_flow_error_set(error, -rc,
1789                                         RTE_FLOW_ERROR_TYPE_ACTION, actions,
1790                                         "Bad RSS action");
1791                                 return -rte_errno;
1792                         }
1793                         break;
1794
1795                 case RTE_FLOW_ACTION_TYPE_DROP:
1796                         SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ACTION_TYPE_DROP,
1797                                                actions_set);
1798                         if ((actions_set & fate_actions_mask) != 0)
1799                                 goto fail_fate_actions;
1800
1801                         spec_filter->template.efs_dmaq_id =
1802                                 EFX_FILTER_SPEC_RX_DMAQ_ID_DROP;
1803                         break;
1804
1805                 case RTE_FLOW_ACTION_TYPE_FLAG:
1806                         SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ACTION_TYPE_FLAG,
1807                                                actions_set);
1808                         if ((actions_set & mark_actions_mask) != 0)
1809                                 goto fail_actions_overlap;
1810
1811                         if ((dp_rx_features & SFC_DP_RX_FEAT_FLOW_FLAG) == 0) {
1812                                 rte_flow_error_set(error, ENOTSUP,
1813                                         RTE_FLOW_ERROR_TYPE_ACTION, NULL,
1814                                         "FLAG action is not supported on the current Rx datapath");
1815                                 return -rte_errno;
1816                         }
1817
1818                         spec_filter->template.efs_flags |=
1819                                 EFX_FILTER_FLAG_ACTION_FLAG;
1820                         break;
1821
1822                 case RTE_FLOW_ACTION_TYPE_MARK:
1823                         SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ACTION_TYPE_MARK,
1824                                                actions_set);
1825                         if ((actions_set & mark_actions_mask) != 0)
1826                                 goto fail_actions_overlap;
1827
1828                         if ((dp_rx_features & SFC_DP_RX_FEAT_FLOW_MARK) == 0) {
1829                                 rte_flow_error_set(error, ENOTSUP,
1830                                         RTE_FLOW_ERROR_TYPE_ACTION, NULL,
1831                                         "MARK action is not supported on the current Rx datapath");
1832                                 return -rte_errno;
1833                         }
1834
1835                         rc = sfc_flow_parse_mark(sa, actions->conf, flow);
1836                         if (rc != 0) {
1837                                 rte_flow_error_set(error, rc,
1838                                         RTE_FLOW_ERROR_TYPE_ACTION, actions,
1839                                         "Bad MARK action");
1840                                 return -rte_errno;
1841                         }
1842                         break;
1843
1844                 default:
1845                         rte_flow_error_set(error, ENOTSUP,
1846                                            RTE_FLOW_ERROR_TYPE_ACTION, actions,
1847                                            "Action is not supported");
1848                         return -rte_errno;
1849                 }
1850
1851                 actions_set |= (1UL << actions->type);
1852         }
1853
1854         /* When fate is unknown, drop traffic. */
1855         if ((actions_set & fate_actions_mask) == 0) {
1856                 spec_filter->template.efs_dmaq_id =
1857                         EFX_FILTER_SPEC_RX_DMAQ_ID_DROP;
1858         }
1859
1860         return 0;
1861
1862 fail_fate_actions:
1863         rte_flow_error_set(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ACTION, actions,
1864                            "Cannot combine several fate-deciding actions, "
1865                            "choose between QUEUE, RSS or DROP");
1866         return -rte_errno;
1867
1868 fail_actions_overlap:
1869         rte_flow_error_set(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ACTION, actions,
1870                            "Overlapping actions are not supported");
1871         return -rte_errno;
1872 }
1873
1874 /**
1875  * Set the EFX_FILTER_MATCH_UNKNOWN_UCAST_DST
1876  * and EFX_FILTER_MATCH_UNKNOWN_MCAST_DST match flags in the same
1877  * specifications after copying.
1878  *
1879  * @param spec[in, out]
1880  *   SFC flow specification to update.
1881  * @param filters_count_for_one_val[in]
1882  *   How many specifications should have the same match flag, what is the
1883  *   number of specifications before copying.
1884  * @param error[out]
1885  *   Perform verbose error reporting if not NULL.
1886  */
1887 static int
1888 sfc_flow_set_unknown_dst_flags(struct sfc_flow_spec *spec,
1889                                unsigned int filters_count_for_one_val,
1890                                struct rte_flow_error *error)
1891 {
1892         unsigned int i;
1893         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
1894         static const efx_filter_match_flags_t vals[] = {
1895                 EFX_FILTER_MATCH_UNKNOWN_UCAST_DST,
1896                 EFX_FILTER_MATCH_UNKNOWN_MCAST_DST
1897         };
1898
1899         if (filters_count_for_one_val * RTE_DIM(vals) != spec_filter->count) {
1900                 rte_flow_error_set(error, EINVAL,
1901                         RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
1902                         "Number of specifications is incorrect while copying "
1903                         "by unknown destination flags");
1904                 return -rte_errno;
1905         }
1906
1907         for (i = 0; i < spec_filter->count; i++) {
1908                 /* The check above ensures that divisor can't be zero here */
1909                 spec_filter->filters[i].efs_match_flags |=
1910                         vals[i / filters_count_for_one_val];
1911         }
1912
1913         return 0;
1914 }
1915
1916 /**
1917  * Check that the following conditions are met:
1918  * - the list of supported filters has a filter
1919  *   with EFX_FILTER_MATCH_UNKNOWN_MCAST_DST flag instead of
1920  *   EFX_FILTER_MATCH_UNKNOWN_UCAST_DST, since this filter will also
1921  *   be inserted.
1922  *
1923  * @param match[in]
1924  *   The match flags of filter.
1925  * @param spec[in]
1926  *   Specification to be supplemented.
1927  * @param filter[in]
1928  *   SFC filter with list of supported filters.
1929  */
1930 static boolean_t
1931 sfc_flow_check_unknown_dst_flags(efx_filter_match_flags_t match,
1932                                  __rte_unused efx_filter_spec_t *spec,
1933                                  struct sfc_filter *filter)
1934 {
1935         unsigned int i;
1936         efx_filter_match_flags_t match_mcast_dst;
1937
1938         match_mcast_dst =
1939                 (match & ~EFX_FILTER_MATCH_UNKNOWN_UCAST_DST) |
1940                 EFX_FILTER_MATCH_UNKNOWN_MCAST_DST;
1941         for (i = 0; i < filter->supported_match_num; i++) {
1942                 if (match_mcast_dst == filter->supported_match[i])
1943                         return B_TRUE;
1944         }
1945
1946         return B_FALSE;
1947 }
1948
1949 /**
1950  * Set the EFX_FILTER_MATCH_ETHER_TYPE match flag and EFX_ETHER_TYPE_IPV4 and
1951  * EFX_ETHER_TYPE_IPV6 values of the corresponding field in the same
1952  * specifications after copying.
1953  *
1954  * @param spec[in, out]
1955  *   SFC flow specification to update.
1956  * @param filters_count_for_one_val[in]
1957  *   How many specifications should have the same EtherType value, what is the
1958  *   number of specifications before copying.
1959  * @param error[out]
1960  *   Perform verbose error reporting if not NULL.
1961  */
1962 static int
1963 sfc_flow_set_ethertypes(struct sfc_flow_spec *spec,
1964                         unsigned int filters_count_for_one_val,
1965                         struct rte_flow_error *error)
1966 {
1967         unsigned int i;
1968         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
1969         static const uint16_t vals[] = {
1970                 EFX_ETHER_TYPE_IPV4, EFX_ETHER_TYPE_IPV6
1971         };
1972
1973         if (filters_count_for_one_val * RTE_DIM(vals) != spec_filter->count) {
1974                 rte_flow_error_set(error, EINVAL,
1975                         RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
1976                         "Number of specifications is incorrect "
1977                         "while copying by Ethertype");
1978                 return -rte_errno;
1979         }
1980
1981         for (i = 0; i < spec_filter->count; i++) {
1982                 spec_filter->filters[i].efs_match_flags |=
1983                         EFX_FILTER_MATCH_ETHER_TYPE;
1984
1985                 /*
1986                  * The check above ensures that
1987                  * filters_count_for_one_val is not 0
1988                  */
1989                 spec_filter->filters[i].efs_ether_type =
1990                         vals[i / filters_count_for_one_val];
1991         }
1992
1993         return 0;
1994 }
1995
1996 /**
1997  * Set the EFX_FILTER_MATCH_OUTER_VID match flag with value 0
1998  * in the same specifications after copying.
1999  *
2000  * @param spec[in, out]
2001  *   SFC flow specification to update.
2002  * @param filters_count_for_one_val[in]
2003  *   How many specifications should have the same match flag, what is the
2004  *   number of specifications before copying.
2005  * @param error[out]
2006  *   Perform verbose error reporting if not NULL.
2007  */
2008 static int
2009 sfc_flow_set_outer_vid_flag(struct sfc_flow_spec *spec,
2010                             unsigned int filters_count_for_one_val,
2011                             struct rte_flow_error *error)
2012 {
2013         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
2014         unsigned int i;
2015
2016         if (filters_count_for_one_val != spec_filter->count) {
2017                 rte_flow_error_set(error, EINVAL,
2018                         RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
2019                         "Number of specifications is incorrect "
2020                         "while copying by outer VLAN ID");
2021                 return -rte_errno;
2022         }
2023
2024         for (i = 0; i < spec_filter->count; i++) {
2025                 spec_filter->filters[i].efs_match_flags |=
2026                         EFX_FILTER_MATCH_OUTER_VID;
2027
2028                 spec_filter->filters[i].efs_outer_vid = 0;
2029         }
2030
2031         return 0;
2032 }
2033
2034 /**
2035  * Set the EFX_FILTER_MATCH_IFRM_UNKNOWN_UCAST_DST and
2036  * EFX_FILTER_MATCH_IFRM_UNKNOWN_MCAST_DST match flags in the same
2037  * specifications after copying.
2038  *
2039  * @param spec[in, out]
2040  *   SFC flow specification to update.
2041  * @param filters_count_for_one_val[in]
2042  *   How many specifications should have the same match flag, what is the
2043  *   number of specifications before copying.
2044  * @param error[out]
2045  *   Perform verbose error reporting if not NULL.
2046  */
2047 static int
2048 sfc_flow_set_ifrm_unknown_dst_flags(struct sfc_flow_spec *spec,
2049                                     unsigned int filters_count_for_one_val,
2050                                     struct rte_flow_error *error)
2051 {
2052         unsigned int i;
2053         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
2054         static const efx_filter_match_flags_t vals[] = {
2055                 EFX_FILTER_MATCH_IFRM_UNKNOWN_UCAST_DST,
2056                 EFX_FILTER_MATCH_IFRM_UNKNOWN_MCAST_DST
2057         };
2058
2059         if (filters_count_for_one_val * RTE_DIM(vals) != spec_filter->count) {
2060                 rte_flow_error_set(error, EINVAL,
2061                         RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
2062                         "Number of specifications is incorrect while copying "
2063                         "by inner frame unknown destination flags");
2064                 return -rte_errno;
2065         }
2066
2067         for (i = 0; i < spec_filter->count; i++) {
2068                 /* The check above ensures that divisor can't be zero here */
2069                 spec_filter->filters[i].efs_match_flags |=
2070                         vals[i / filters_count_for_one_val];
2071         }
2072
2073         return 0;
2074 }
2075
2076 /**
2077  * Check that the following conditions are met:
2078  * - the specification corresponds to a filter for encapsulated traffic
2079  * - the list of supported filters has a filter
2080  *   with EFX_FILTER_MATCH_IFRM_UNKNOWN_MCAST_DST flag instead of
2081  *   EFX_FILTER_MATCH_IFRM_UNKNOWN_UCAST_DST, since this filter will also
2082  *   be inserted.
2083  *
2084  * @param match[in]
2085  *   The match flags of filter.
2086  * @param spec[in]
2087  *   Specification to be supplemented.
2088  * @param filter[in]
2089  *   SFC filter with list of supported filters.
2090  */
2091 static boolean_t
2092 sfc_flow_check_ifrm_unknown_dst_flags(efx_filter_match_flags_t match,
2093                                       efx_filter_spec_t *spec,
2094                                       struct sfc_filter *filter)
2095 {
2096         unsigned int i;
2097         efx_tunnel_protocol_t encap_type = spec->efs_encap_type;
2098         efx_filter_match_flags_t match_mcast_dst;
2099
2100         if (encap_type == EFX_TUNNEL_PROTOCOL_NONE)
2101                 return B_FALSE;
2102
2103         match_mcast_dst =
2104                 (match & ~EFX_FILTER_MATCH_IFRM_UNKNOWN_UCAST_DST) |
2105                 EFX_FILTER_MATCH_IFRM_UNKNOWN_MCAST_DST;
2106         for (i = 0; i < filter->supported_match_num; i++) {
2107                 if (match_mcast_dst == filter->supported_match[i])
2108                         return B_TRUE;
2109         }
2110
2111         return B_FALSE;
2112 }
2113
2114 /**
2115  * Check that the list of supported filters has a filter that differs
2116  * from @p match in that it has no flag EFX_FILTER_MATCH_OUTER_VID
2117  * in this case that filter will be used and the flag
2118  * EFX_FILTER_MATCH_OUTER_VID is not needed.
2119  *
2120  * @param match[in]
2121  *   The match flags of filter.
2122  * @param spec[in]
2123  *   Specification to be supplemented.
2124  * @param filter[in]
2125  *   SFC filter with list of supported filters.
2126  */
2127 static boolean_t
2128 sfc_flow_check_outer_vid_flag(efx_filter_match_flags_t match,
2129                               __rte_unused efx_filter_spec_t *spec,
2130                               struct sfc_filter *filter)
2131 {
2132         unsigned int i;
2133         efx_filter_match_flags_t match_without_vid =
2134                 match & ~EFX_FILTER_MATCH_OUTER_VID;
2135
2136         for (i = 0; i < filter->supported_match_num; i++) {
2137                 if (match_without_vid == filter->supported_match[i])
2138                         return B_FALSE;
2139         }
2140
2141         return B_TRUE;
2142 }
2143
2144 /*
2145  * Match flags that can be automatically added to filters.
2146  * Selecting the last minimum when searching for the copy flag ensures that the
2147  * EFX_FILTER_MATCH_UNKNOWN_UCAST_DST flag has a higher priority than
2148  * EFX_FILTER_MATCH_ETHER_TYPE. This is because the filter
2149  * EFX_FILTER_MATCH_UNKNOWN_UCAST_DST is at the end of the list of supported
2150  * filters.
2151  */
2152 static const struct sfc_flow_copy_flag sfc_flow_copy_flags[] = {
2153         {
2154                 .flag = EFX_FILTER_MATCH_UNKNOWN_UCAST_DST,
2155                 .vals_count = 2,
2156                 .set_vals = sfc_flow_set_unknown_dst_flags,
2157                 .spec_check = sfc_flow_check_unknown_dst_flags,
2158         },
2159         {
2160                 .flag = EFX_FILTER_MATCH_ETHER_TYPE,
2161                 .vals_count = 2,
2162                 .set_vals = sfc_flow_set_ethertypes,
2163                 .spec_check = NULL,
2164         },
2165         {
2166                 .flag = EFX_FILTER_MATCH_IFRM_UNKNOWN_UCAST_DST,
2167                 .vals_count = 2,
2168                 .set_vals = sfc_flow_set_ifrm_unknown_dst_flags,
2169                 .spec_check = sfc_flow_check_ifrm_unknown_dst_flags,
2170         },
2171         {
2172                 .flag = EFX_FILTER_MATCH_OUTER_VID,
2173                 .vals_count = 1,
2174                 .set_vals = sfc_flow_set_outer_vid_flag,
2175                 .spec_check = sfc_flow_check_outer_vid_flag,
2176         },
2177 };
2178
2179 /* Get item from array sfc_flow_copy_flags */
2180 static const struct sfc_flow_copy_flag *
2181 sfc_flow_get_copy_flag(efx_filter_match_flags_t flag)
2182 {
2183         unsigned int i;
2184
2185         for (i = 0; i < RTE_DIM(sfc_flow_copy_flags); i++) {
2186                 if (sfc_flow_copy_flags[i].flag == flag)
2187                         return &sfc_flow_copy_flags[i];
2188         }
2189
2190         return NULL;
2191 }
2192
2193 /**
2194  * Make copies of the specifications, set match flag and values
2195  * of the field that corresponds to it.
2196  *
2197  * @param spec[in, out]
2198  *   SFC flow specification to update.
2199  * @param flag[in]
2200  *   The match flag to add.
2201  * @param error[out]
2202  *   Perform verbose error reporting if not NULL.
2203  */
2204 static int
2205 sfc_flow_spec_add_match_flag(struct sfc_flow_spec *spec,
2206                              efx_filter_match_flags_t flag,
2207                              struct rte_flow_error *error)
2208 {
2209         unsigned int i;
2210         unsigned int new_filters_count;
2211         unsigned int filters_count_for_one_val;
2212         const struct sfc_flow_copy_flag *copy_flag;
2213         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
2214         int rc;
2215
2216         copy_flag = sfc_flow_get_copy_flag(flag);
2217         if (copy_flag == NULL) {
2218                 rte_flow_error_set(error, ENOTSUP,
2219                                    RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
2220                                    "Unsupported spec field for copying");
2221                 return -rte_errno;
2222         }
2223
2224         new_filters_count = spec_filter->count * copy_flag->vals_count;
2225         if (new_filters_count > SF_FLOW_SPEC_NB_FILTERS_MAX) {
2226                 rte_flow_error_set(error, EINVAL,
2227                         RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
2228                         "Too much EFX specifications in the flow rule");
2229                 return -rte_errno;
2230         }
2231
2232         /* Copy filters specifications */
2233         for (i = spec_filter->count; i < new_filters_count; i++) {
2234                 spec_filter->filters[i] =
2235                         spec_filter->filters[i - spec_filter->count];
2236         }
2237
2238         filters_count_for_one_val = spec_filter->count;
2239         spec_filter->count = new_filters_count;
2240
2241         rc = copy_flag->set_vals(spec, filters_count_for_one_val, error);
2242         if (rc != 0)
2243                 return rc;
2244
2245         return 0;
2246 }
2247
2248 /**
2249  * Check that the given set of match flags missing in the original filter spec
2250  * could be covered by adding spec copies which specify the corresponding
2251  * flags and packet field values to match.
2252  *
2253  * @param miss_flags[in]
2254  *   Flags that are missing until the supported filter.
2255  * @param spec[in]
2256  *   Specification to be supplemented.
2257  * @param filter[in]
2258  *   SFC filter.
2259  *
2260  * @return
2261  *   Number of specifications after copy or 0, if the flags can not be added.
2262  */
2263 static unsigned int
2264 sfc_flow_check_missing_flags(efx_filter_match_flags_t miss_flags,
2265                              efx_filter_spec_t *spec,
2266                              struct sfc_filter *filter)
2267 {
2268         unsigned int i;
2269         efx_filter_match_flags_t copy_flags = 0;
2270         efx_filter_match_flags_t flag;
2271         efx_filter_match_flags_t match = spec->efs_match_flags | miss_flags;
2272         sfc_flow_spec_check *check;
2273         unsigned int multiplier = 1;
2274
2275         for (i = 0; i < RTE_DIM(sfc_flow_copy_flags); i++) {
2276                 flag = sfc_flow_copy_flags[i].flag;
2277                 check = sfc_flow_copy_flags[i].spec_check;
2278                 if ((flag & miss_flags) == flag) {
2279                         if (check != NULL && (!check(match, spec, filter)))
2280                                 continue;
2281
2282                         copy_flags |= flag;
2283                         multiplier *= sfc_flow_copy_flags[i].vals_count;
2284                 }
2285         }
2286
2287         if (copy_flags == miss_flags)
2288                 return multiplier;
2289
2290         return 0;
2291 }
2292
2293 /**
2294  * Attempt to supplement the specification template to the minimally
2295  * supported set of match flags. To do this, it is necessary to copy
2296  * the specifications, filling them with the values of fields that
2297  * correspond to the missing flags.
2298  * The necessary and sufficient filter is built from the fewest number
2299  * of copies which could be made to cover the minimally required set
2300  * of flags.
2301  *
2302  * @param sa[in]
2303  *   SFC adapter.
2304  * @param spec[in, out]
2305  *   SFC flow specification to update.
2306  * @param error[out]
2307  *   Perform verbose error reporting if not NULL.
2308  */
2309 static int
2310 sfc_flow_spec_filters_complete(struct sfc_adapter *sa,
2311                                struct sfc_flow_spec *spec,
2312                                struct rte_flow_error *error)
2313 {
2314         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
2315         struct sfc_filter *filter = &sa->filter;
2316         efx_filter_match_flags_t miss_flags;
2317         efx_filter_match_flags_t min_miss_flags = 0;
2318         efx_filter_match_flags_t match;
2319         unsigned int min_multiplier = UINT_MAX;
2320         unsigned int multiplier;
2321         unsigned int i;
2322         int rc;
2323
2324         match = spec_filter->template.efs_match_flags;
2325         for (i = 0; i < filter->supported_match_num; i++) {
2326                 if ((match & filter->supported_match[i]) == match) {
2327                         miss_flags = filter->supported_match[i] & (~match);
2328                         multiplier = sfc_flow_check_missing_flags(miss_flags,
2329                                 &spec_filter->template, filter);
2330                         if (multiplier > 0) {
2331                                 if (multiplier <= min_multiplier) {
2332                                         min_multiplier = multiplier;
2333                                         min_miss_flags = miss_flags;
2334                                 }
2335                         }
2336                 }
2337         }
2338
2339         if (min_multiplier == UINT_MAX) {
2340                 rte_flow_error_set(error, ENOTSUP,
2341                                    RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
2342                                    "The flow rule pattern is unsupported");
2343                 return -rte_errno;
2344         }
2345
2346         for (i = 0; i < RTE_DIM(sfc_flow_copy_flags); i++) {
2347                 efx_filter_match_flags_t flag = sfc_flow_copy_flags[i].flag;
2348
2349                 if ((flag & min_miss_flags) == flag) {
2350                         rc = sfc_flow_spec_add_match_flag(spec, flag, error);
2351                         if (rc != 0)
2352                                 return rc;
2353                 }
2354         }
2355
2356         return 0;
2357 }
2358
2359 /**
2360  * Check that set of match flags is referred to by a filter. Filter is
2361  * described by match flags with the ability to add OUTER_VID and INNER_VID
2362  * flags.
2363  *
2364  * @param match_flags[in]
2365  *   Set of match flags.
2366  * @param flags_pattern[in]
2367  *   Pattern of filter match flags.
2368  */
2369 static boolean_t
2370 sfc_flow_is_match_with_vids(efx_filter_match_flags_t match_flags,
2371                             efx_filter_match_flags_t flags_pattern)
2372 {
2373         if ((match_flags & flags_pattern) != flags_pattern)
2374                 return B_FALSE;
2375
2376         switch (match_flags & ~flags_pattern) {
2377         case 0:
2378         case EFX_FILTER_MATCH_OUTER_VID:
2379         case EFX_FILTER_MATCH_OUTER_VID | EFX_FILTER_MATCH_INNER_VID:
2380                 return B_TRUE;
2381         default:
2382                 return B_FALSE;
2383         }
2384 }
2385
2386 /**
2387  * Check whether the spec maps to a hardware filter which is known to be
2388  * ineffective despite being valid.
2389  *
2390  * @param filter[in]
2391  *   SFC filter with list of supported filters.
2392  * @param spec[in]
2393  *   SFC flow specification.
2394  */
2395 static boolean_t
2396 sfc_flow_is_match_flags_exception(struct sfc_filter *filter,
2397                                   struct sfc_flow_spec *spec)
2398 {
2399         unsigned int i;
2400         uint16_t ether_type;
2401         uint8_t ip_proto;
2402         efx_filter_match_flags_t match_flags;
2403         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
2404
2405         for (i = 0; i < spec_filter->count; i++) {
2406                 match_flags = spec_filter->filters[i].efs_match_flags;
2407
2408                 if (sfc_flow_is_match_with_vids(match_flags,
2409                                                 EFX_FILTER_MATCH_ETHER_TYPE) ||
2410                     sfc_flow_is_match_with_vids(match_flags,
2411                                                 EFX_FILTER_MATCH_ETHER_TYPE |
2412                                                 EFX_FILTER_MATCH_LOC_MAC)) {
2413                         ether_type = spec_filter->filters[i].efs_ether_type;
2414                         if (filter->supports_ip_proto_or_addr_filter &&
2415                             (ether_type == EFX_ETHER_TYPE_IPV4 ||
2416                              ether_type == EFX_ETHER_TYPE_IPV6))
2417                                 return B_TRUE;
2418                 } else if (sfc_flow_is_match_with_vids(match_flags,
2419                                 EFX_FILTER_MATCH_ETHER_TYPE |
2420                                 EFX_FILTER_MATCH_IP_PROTO) ||
2421                            sfc_flow_is_match_with_vids(match_flags,
2422                                 EFX_FILTER_MATCH_ETHER_TYPE |
2423                                 EFX_FILTER_MATCH_IP_PROTO |
2424                                 EFX_FILTER_MATCH_LOC_MAC)) {
2425                         ip_proto = spec_filter->filters[i].efs_ip_proto;
2426                         if (filter->supports_rem_or_local_port_filter &&
2427                             (ip_proto == EFX_IPPROTO_TCP ||
2428                              ip_proto == EFX_IPPROTO_UDP))
2429                                 return B_TRUE;
2430                 }
2431         }
2432
2433         return B_FALSE;
2434 }
2435
2436 static int
2437 sfc_flow_validate_match_flags(struct sfc_adapter *sa,
2438                               struct rte_flow *flow,
2439                               struct rte_flow_error *error)
2440 {
2441         struct sfc_flow_spec *spec = &flow->spec;
2442         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
2443         efx_filter_spec_t *spec_tmpl = &spec_filter->template;
2444         efx_filter_match_flags_t match_flags = spec_tmpl->efs_match_flags;
2445         int rc;
2446
2447         /* Initialize the first filter spec with template */
2448         spec_filter->filters[0] = *spec_tmpl;
2449         spec_filter->count = 1;
2450
2451         if (!sfc_filter_is_match_supported(sa, match_flags)) {
2452                 rc = sfc_flow_spec_filters_complete(sa, &flow->spec, error);
2453                 if (rc != 0)
2454                         return rc;
2455         }
2456
2457         if (sfc_flow_is_match_flags_exception(&sa->filter, &flow->spec)) {
2458                 rte_flow_error_set(error, ENOTSUP,
2459                         RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
2460                         "The flow rule pattern is unsupported");
2461                 return -rte_errno;
2462         }
2463
2464         return 0;
2465 }
2466
2467 static int
2468 sfc_flow_parse_rte_to_filter(struct rte_eth_dev *dev,
2469                              const struct rte_flow_item pattern[],
2470                              const struct rte_flow_action actions[],
2471                              struct rte_flow *flow,
2472                              struct rte_flow_error *error)
2473 {
2474         struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
2475         struct sfc_flow_spec *spec = &flow->spec;
2476         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
2477         struct sfc_flow_parse_ctx ctx;
2478         int rc;
2479
2480         ctx.type = SFC_FLOW_PARSE_CTX_FILTER;
2481         ctx.filter = &spec_filter->template;
2482
2483         rc = sfc_flow_parse_pattern(sfc_flow_items, RTE_DIM(sfc_flow_items),
2484                                     pattern, &ctx, error);
2485         if (rc != 0)
2486                 goto fail_bad_value;
2487
2488         rc = sfc_flow_parse_actions(sa, actions, flow, error);
2489         if (rc != 0)
2490                 goto fail_bad_value;
2491
2492         rc = sfc_flow_validate_match_flags(sa, flow, error);
2493         if (rc != 0)
2494                 goto fail_bad_value;
2495
2496         return 0;
2497
2498 fail_bad_value:
2499         return rc;
2500 }
2501
2502 static int
2503 sfc_flow_parse_rte_to_mae(struct rte_eth_dev *dev,
2504                           const struct rte_flow_item pattern[],
2505                           const struct rte_flow_action actions[],
2506                           struct rte_flow *flow,
2507                           struct rte_flow_error *error)
2508 {
2509         struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
2510         struct sfc_flow_spec *spec = &flow->spec;
2511         struct sfc_flow_spec_mae *spec_mae = &spec->mae;
2512         int rc;
2513
2514         rc = sfc_mae_rule_parse_pattern(sa, pattern, spec_mae, error);
2515         if (rc != 0)
2516                 return rc;
2517
2518         rc = sfc_mae_rule_parse_actions(sa, actions, spec_mae, error);
2519         if (rc != 0)
2520                 return rc;
2521
2522         return 0;
2523 }
2524
2525 static int
2526 sfc_flow_parse(struct rte_eth_dev *dev,
2527                const struct rte_flow_attr *attr,
2528                const struct rte_flow_item pattern[],
2529                const struct rte_flow_action actions[],
2530                struct rte_flow *flow,
2531                struct rte_flow_error *error)
2532 {
2533         struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
2534         const struct sfc_flow_ops_by_spec *ops;
2535         int rc;
2536
2537         rc = sfc_flow_parse_attr(sa, attr, flow, error);
2538         if (rc != 0)
2539                 return rc;
2540
2541         ops = sfc_flow_get_ops_by_spec(flow);
2542         if (ops == NULL || ops->parse == NULL) {
2543                 rte_flow_error_set(error, ENOTSUP,
2544                                    RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
2545                                    "No backend to handle this flow");
2546                 return -rte_errno;
2547         }
2548
2549         return ops->parse(dev, pattern, actions, flow, error);
2550 }
2551
2552 static struct rte_flow *
2553 sfc_flow_zmalloc(struct rte_flow_error *error)
2554 {
2555         struct rte_flow *flow;
2556
2557         flow = rte_zmalloc("sfc_rte_flow", sizeof(*flow), 0);
2558         if (flow == NULL) {
2559                 rte_flow_error_set(error, ENOMEM,
2560                                    RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
2561                                    "Failed to allocate memory");
2562         }
2563
2564         return flow;
2565 }
2566
2567 static void
2568 sfc_flow_free(struct sfc_adapter *sa, struct rte_flow *flow)
2569 {
2570         const struct sfc_flow_ops_by_spec *ops;
2571
2572         ops = sfc_flow_get_ops_by_spec(flow);
2573         if (ops != NULL && ops->cleanup != NULL)
2574                 ops->cleanup(sa, flow);
2575
2576         rte_free(flow);
2577 }
2578
2579 static int
2580 sfc_flow_insert(struct sfc_adapter *sa, struct rte_flow *flow,
2581                 struct rte_flow_error *error)
2582 {
2583         const struct sfc_flow_ops_by_spec *ops;
2584         int rc;
2585
2586         ops = sfc_flow_get_ops_by_spec(flow);
2587         if (ops == NULL || ops->insert == NULL) {
2588                 rte_flow_error_set(error, ENOTSUP,
2589                                    RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
2590                                    "No backend to handle this flow");
2591                 return rte_errno;
2592         }
2593
2594         rc = ops->insert(sa, flow);
2595         if (rc != 0) {
2596                 rte_flow_error_set(error, rc, RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
2597                                    NULL, "Failed to insert the flow rule");
2598         }
2599
2600         return rc;
2601 }
2602
2603 static int
2604 sfc_flow_remove(struct sfc_adapter *sa, struct rte_flow *flow,
2605                 struct rte_flow_error *error)
2606 {
2607         const struct sfc_flow_ops_by_spec *ops;
2608         int rc;
2609
2610         ops = sfc_flow_get_ops_by_spec(flow);
2611         if (ops == NULL || ops->remove == NULL) {
2612                 rte_flow_error_set(error, ENOTSUP,
2613                                    RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
2614                                    "No backend to handle this flow");
2615                 return rte_errno;
2616         }
2617
2618         rc = ops->remove(sa, flow);
2619         if (rc != 0) {
2620                 rte_flow_error_set(error, rc, RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
2621                                    NULL, "Failed to remove the flow rule");
2622         }
2623
2624         return rc;
2625 }
2626
2627 static int
2628 sfc_flow_verify(struct sfc_adapter *sa, struct rte_flow *flow,
2629                 struct rte_flow_error *error)
2630 {
2631         const struct sfc_flow_ops_by_spec *ops;
2632         int rc = 0;
2633
2634         ops = sfc_flow_get_ops_by_spec(flow);
2635         if (ops == NULL) {
2636                 rte_flow_error_set(error, ENOTSUP,
2637                                    RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
2638                                    "No backend to handle this flow");
2639                 return -rte_errno;
2640         }
2641
2642         if (ops->verify != NULL) {
2643                 SFC_ASSERT(sfc_adapter_is_locked(sa));
2644                 rc = ops->verify(sa, flow);
2645         }
2646
2647         if (rc != 0) {
2648                 rte_flow_error_set(error, rc,
2649                         RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
2650                         "Failed to verify flow validity with FW");
2651                 return -rte_errno;
2652         }
2653
2654         return 0;
2655 }
2656
2657 static int
2658 sfc_flow_validate(struct rte_eth_dev *dev,
2659                   const struct rte_flow_attr *attr,
2660                   const struct rte_flow_item pattern[],
2661                   const struct rte_flow_action actions[],
2662                   struct rte_flow_error *error)
2663 {
2664         struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
2665         struct rte_flow *flow;
2666         int rc;
2667
2668         flow = sfc_flow_zmalloc(error);
2669         if (flow == NULL)
2670                 return -rte_errno;
2671
2672         sfc_adapter_lock(sa);
2673
2674         rc = sfc_flow_parse(dev, attr, pattern, actions, flow, error);
2675         if (rc == 0)
2676                 rc = sfc_flow_verify(sa, flow, error);
2677
2678         sfc_flow_free(sa, flow);
2679
2680         sfc_adapter_unlock(sa);
2681
2682         return rc;
2683 }
2684
2685 static struct rte_flow *
2686 sfc_flow_create(struct rte_eth_dev *dev,
2687                 const struct rte_flow_attr *attr,
2688                 const struct rte_flow_item pattern[],
2689                 const struct rte_flow_action actions[],
2690                 struct rte_flow_error *error)
2691 {
2692         struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
2693         struct rte_flow *flow = NULL;
2694         int rc;
2695
2696         flow = sfc_flow_zmalloc(error);
2697         if (flow == NULL)
2698                 goto fail_no_mem;
2699
2700         sfc_adapter_lock(sa);
2701
2702         rc = sfc_flow_parse(dev, attr, pattern, actions, flow, error);
2703         if (rc != 0)
2704                 goto fail_bad_value;
2705
2706         TAILQ_INSERT_TAIL(&sa->flow_list, flow, entries);
2707
2708         if (sa->state == SFC_ADAPTER_STARTED) {
2709                 rc = sfc_flow_insert(sa, flow, error);
2710                 if (rc != 0)
2711                         goto fail_flow_insert;
2712         }
2713
2714         sfc_adapter_unlock(sa);
2715
2716         return flow;
2717
2718 fail_flow_insert:
2719         TAILQ_REMOVE(&sa->flow_list, flow, entries);
2720
2721 fail_bad_value:
2722         sfc_flow_free(sa, flow);
2723         sfc_adapter_unlock(sa);
2724
2725 fail_no_mem:
2726         return NULL;
2727 }
2728
2729 static int
2730 sfc_flow_destroy(struct rte_eth_dev *dev,
2731                  struct rte_flow *flow,
2732                  struct rte_flow_error *error)
2733 {
2734         struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
2735         struct rte_flow *flow_ptr;
2736         int rc = EINVAL;
2737
2738         sfc_adapter_lock(sa);
2739
2740         TAILQ_FOREACH(flow_ptr, &sa->flow_list, entries) {
2741                 if (flow_ptr == flow)
2742                         rc = 0;
2743         }
2744         if (rc != 0) {
2745                 rte_flow_error_set(error, rc,
2746                                    RTE_FLOW_ERROR_TYPE_HANDLE, NULL,
2747                                    "Failed to find flow rule to destroy");
2748                 goto fail_bad_value;
2749         }
2750
2751         if (sa->state == SFC_ADAPTER_STARTED)
2752                 rc = sfc_flow_remove(sa, flow, error);
2753
2754         TAILQ_REMOVE(&sa->flow_list, flow, entries);
2755         sfc_flow_free(sa, flow);
2756
2757 fail_bad_value:
2758         sfc_adapter_unlock(sa);
2759
2760         return -rc;
2761 }
2762
2763 static int
2764 sfc_flow_flush(struct rte_eth_dev *dev,
2765                struct rte_flow_error *error)
2766 {
2767         struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
2768         struct rte_flow *flow;
2769         int ret = 0;
2770
2771         sfc_adapter_lock(sa);
2772
2773         while ((flow = TAILQ_FIRST(&sa->flow_list)) != NULL) {
2774                 if (sa->state == SFC_ADAPTER_STARTED) {
2775                         int rc;
2776
2777                         rc = sfc_flow_remove(sa, flow, error);
2778                         if (rc != 0)
2779                                 ret = rc;
2780                 }
2781
2782                 TAILQ_REMOVE(&sa->flow_list, flow, entries);
2783                 sfc_flow_free(sa, flow);
2784         }
2785
2786         sfc_adapter_unlock(sa);
2787
2788         return -ret;
2789 }
2790
2791 static int
2792 sfc_flow_isolate(struct rte_eth_dev *dev, int enable,
2793                  struct rte_flow_error *error)
2794 {
2795         struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
2796         int ret = 0;
2797
2798         sfc_adapter_lock(sa);
2799         if (sa->state != SFC_ADAPTER_INITIALIZED) {
2800                 rte_flow_error_set(error, EBUSY,
2801                                    RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
2802                                    NULL, "please close the port first");
2803                 ret = -rte_errno;
2804         } else {
2805                 sfc_sa2shared(sa)->isolated = (enable) ? B_TRUE : B_FALSE;
2806         }
2807         sfc_adapter_unlock(sa);
2808
2809         return ret;
2810 }
2811
2812 const struct rte_flow_ops sfc_flow_ops = {
2813         .validate = sfc_flow_validate,
2814         .create = sfc_flow_create,
2815         .destroy = sfc_flow_destroy,
2816         .flush = sfc_flow_flush,
2817         .query = NULL,
2818         .isolate = sfc_flow_isolate,
2819 };
2820
2821 void
2822 sfc_flow_init(struct sfc_adapter *sa)
2823 {
2824         SFC_ASSERT(sfc_adapter_is_locked(sa));
2825
2826         TAILQ_INIT(&sa->flow_list);
2827 }
2828
2829 void
2830 sfc_flow_fini(struct sfc_adapter *sa)
2831 {
2832         struct rte_flow *flow;
2833
2834         SFC_ASSERT(sfc_adapter_is_locked(sa));
2835
2836         while ((flow = TAILQ_FIRST(&sa->flow_list)) != NULL) {
2837                 TAILQ_REMOVE(&sa->flow_list, flow, entries);
2838                 sfc_flow_free(sa, flow);
2839         }
2840 }
2841
2842 void
2843 sfc_flow_stop(struct sfc_adapter *sa)
2844 {
2845         struct sfc_adapter_shared * const sas = sfc_sa2shared(sa);
2846         struct sfc_rss *rss = &sas->rss;
2847         struct rte_flow *flow;
2848
2849         SFC_ASSERT(sfc_adapter_is_locked(sa));
2850
2851         TAILQ_FOREACH(flow, &sa->flow_list, entries)
2852                 sfc_flow_remove(sa, flow, NULL);
2853
2854         if (rss->dummy_rss_context != EFX_RSS_CONTEXT_DEFAULT) {
2855                 efx_rx_scale_context_free(sa->nic, rss->dummy_rss_context);
2856                 rss->dummy_rss_context = EFX_RSS_CONTEXT_DEFAULT;
2857         }
2858
2859         /*
2860          * MAE counter service is not stopped on flow rule remove to avoid
2861          * extra work. Make sure that it is stopped here.
2862          */
2863         sfc_mae_counter_stop(sa);
2864 }
2865
2866 int
2867 sfc_flow_start(struct sfc_adapter *sa)
2868 {
2869         struct rte_flow *flow;
2870         int rc = 0;
2871
2872         sfc_log_init(sa, "entry");
2873
2874         SFC_ASSERT(sfc_adapter_is_locked(sa));
2875
2876         TAILQ_FOREACH(flow, &sa->flow_list, entries) {
2877                 rc = sfc_flow_insert(sa, flow, NULL);
2878                 if (rc != 0)
2879                         goto fail_bad_flow;
2880         }
2881
2882         sfc_log_init(sa, "done");
2883
2884 fail_bad_flow:
2885         return rc;
2886 }