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_flow_tunnel.h"
  26 #include "sfc_log.h"
  27 #include "sfc_dp_rx.h"
  28 #include "sfc_mae_counter.h"
  29 #include "sfc_switch.h"
  30
  31 struct sfc_flow_ops_by_spec {
  32         sfc_flow_parse_cb_t     *parse;
  33         sfc_flow_verify_cb_t    *verify;
  34         sfc_flow_cleanup_cb_t   *cleanup;
  35         sfc_flow_insert_cb_t    *insert;
  36         sfc_flow_remove_cb_t    *remove;
  37         sfc_flow_query_cb_t     *query;
  38 };
  39
  40 static sfc_flow_parse_cb_t sfc_flow_parse_rte_to_filter;
  41 static sfc_flow_parse_cb_t sfc_flow_parse_rte_to_mae;
  42 static sfc_flow_insert_cb_t sfc_flow_filter_insert;
  43 static sfc_flow_remove_cb_t sfc_flow_filter_remove;
  44
  45 static const struct sfc_flow_ops_by_spec sfc_flow_ops_filter = {
  46         .parse = sfc_flow_parse_rte_to_filter,
  47         .verify = NULL,
  48         .cleanup = NULL,
  49         .insert = sfc_flow_filter_insert,
  50         .remove = sfc_flow_filter_remove,
  51         .query = NULL,
  52 };
  53
  54 static const struct sfc_flow_ops_by_spec sfc_flow_ops_mae = {
  55         .parse = sfc_flow_parse_rte_to_mae,
  56         .verify = sfc_mae_flow_verify,
  57         .cleanup = sfc_mae_flow_cleanup,
  58         .insert = sfc_mae_flow_insert,
  59         .remove = sfc_mae_flow_remove,
  60         .query = sfc_mae_flow_query,
  61 };
  62
  63 static const struct sfc_flow_ops_by_spec *
  64 sfc_flow_get_ops_by_spec(struct rte_flow *flow)
  65 {
  66         struct sfc_flow_spec *spec = &flow->spec;
  67         const struct sfc_flow_ops_by_spec *ops = NULL;
  68
  69         switch (spec->type) {
  70         case SFC_FLOW_SPEC_FILTER:
  71                 ops = &sfc_flow_ops_filter;
  72                 break;
  73         case SFC_FLOW_SPEC_MAE:
  74                 ops = &sfc_flow_ops_mae;
  75                 break;
  76         default:
  77                 SFC_ASSERT(false);
  78                 break;
  79         }
  80
  81         return ops;
  82 }
  83
  84 /*
  85  * Currently, filter-based (VNIC) flow API is implemented in such a manner
  86  * that each flow rule is converted to one or more hardware filters.
  87  * All elements of flow rule (attributes, pattern items, actions)
  88  * correspond to one or more fields in the efx_filter_spec_s structure
  89  * that is responsible for the hardware filter.
  90  * If some required field is unset in the flow rule, then a handful
  91  * of filter copies will be created to cover all possible values
  92  * of such a field.
  93  */
  94
  95 static sfc_flow_item_parse sfc_flow_parse_void;
  96 static sfc_flow_item_parse sfc_flow_parse_eth;
  97 static sfc_flow_item_parse sfc_flow_parse_vlan;
  98 static sfc_flow_item_parse sfc_flow_parse_ipv4;
  99 static sfc_flow_item_parse sfc_flow_parse_ipv6;
 100 static sfc_flow_item_parse sfc_flow_parse_tcp;
 101 static sfc_flow_item_parse sfc_flow_parse_udp;
 102 static sfc_flow_item_parse sfc_flow_parse_vxlan;
 103 static sfc_flow_item_parse sfc_flow_parse_geneve;
 104 static sfc_flow_item_parse sfc_flow_parse_nvgre;
 105 static sfc_flow_item_parse sfc_flow_parse_pppoex;
 106
 107 typedef int (sfc_flow_spec_set_vals)(struct sfc_flow_spec *spec,
 108                                      unsigned int filters_count_for_one_val,
 109                                      struct rte_flow_error *error);
 110
 111 typedef boolean_t (sfc_flow_spec_check)(efx_filter_match_flags_t match,
 112                                         efx_filter_spec_t *spec,
 113                                         struct sfc_filter *filter);
 114
 115 struct sfc_flow_copy_flag {
 116         /* EFX filter specification match flag */
 117         efx_filter_match_flags_t flag;
 118         /* Number of values of corresponding field */
 119         unsigned int vals_count;
 120         /* Function to set values in specifications */
 121         sfc_flow_spec_set_vals *set_vals;
 122         /*
 123          * Function to check that the specification is suitable
 124          * for adding this match flag
 125          */
 126         sfc_flow_spec_check *spec_check;
 127 };
 128
 129 static sfc_flow_spec_set_vals sfc_flow_set_unknown_dst_flags;
 130 static sfc_flow_spec_check sfc_flow_check_unknown_dst_flags;
 131 static sfc_flow_spec_set_vals sfc_flow_set_ethertypes;
 132 static sfc_flow_spec_set_vals sfc_flow_set_ifrm_unknown_dst_flags;
 133 static sfc_flow_spec_check sfc_flow_check_ifrm_unknown_dst_flags;
 134 static sfc_flow_spec_set_vals sfc_flow_set_outer_vid_flag;
 135 static sfc_flow_spec_check sfc_flow_check_outer_vid_flag;
 136
 137 static boolean_t
 138 sfc_flow_is_zero(const uint8_t *buf, unsigned int size)
 139 {
 140         uint8_t sum = 0;
 141         unsigned int i;
 142
 143         for (i = 0; i < size; i++)
 144                 sum |= buf[i];
 145
 146         return (sum == 0) ? B_TRUE : B_FALSE;
 147 }
 148
 149 /*
 150  * Validate item and prepare structures spec and mask for parsing
 151  */
 152 int
 153 sfc_flow_parse_init(const struct rte_flow_item *item,
 154                     const void **spec_ptr,
 155                     const void **mask_ptr,
 156                     const void *supp_mask,
 157                     const void *def_mask,
 158                     unsigned int size,
 159                     struct rte_flow_error *error)
 160 {
 161         const uint8_t *spec;
 162         const uint8_t *mask;
 163         const uint8_t *last;
 164         uint8_t supp;
 165         unsigned int i;
 166
 167         if (item == NULL) {
 168                 rte_flow_error_set(error, EINVAL,
 169                                    RTE_FLOW_ERROR_TYPE_ITEM, NULL,
 170                                    "NULL item");
 171                 return -rte_errno;
 172         }
 173
 174         if ((item->last != NULL || item->mask != NULL) && item->spec == NULL) {
 175                 rte_flow_error_set(error, EINVAL,
 176                                    RTE_FLOW_ERROR_TYPE_ITEM, item,
 177                                    "Mask or last is set without spec");
 178                 return -rte_errno;
 179         }
 180
 181         /*
 182          * If "mask" is not set, default mask is used,
 183          * but if default mask is NULL, "mask" should be set
 184          */
 185         if (item->mask == NULL) {
 186                 if (def_mask == NULL) {
 187                         rte_flow_error_set(error, EINVAL,
 188                                 RTE_FLOW_ERROR_TYPE_ITEM, NULL,
 189                                 "Mask should be specified");
 190                         return -rte_errno;
 191                 }
 192
 193                 mask = def_mask;
 194         } else {
 195                 mask = item->mask;
 196         }
 197
 198         spec = item->spec;
 199         last = item->last;
 200
 201         if (spec == NULL)
 202                 goto exit;
 203
 204         /*
 205          * If field values in "last" are either 0 or equal to the corresponding
 206          * values in "spec" then they are ignored
 207          */
 208         if (last != NULL &&
 209             !sfc_flow_is_zero(last, size) &&
 210             memcmp(last, spec, size) != 0) {
 211                 rte_flow_error_set(error, ENOTSUP,
 212                                    RTE_FLOW_ERROR_TYPE_ITEM, item,
 213                                    "Ranging is not supported");
 214                 return -rte_errno;
 215         }
 216
 217         if (supp_mask == NULL) {
 218                 rte_flow_error_set(error, EINVAL,
 219                         RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
 220                         "Supported mask for item should be specified");
 221                 return -rte_errno;
 222         }
 223
 224         /* Check that mask does not ask for more match than supp_mask */
 225         for (i = 0; i < size; i++) {
 226                 supp = ((const uint8_t *)supp_mask)[i];
 227
 228                 if (~supp & mask[i]) {
 229                         rte_flow_error_set(error, ENOTSUP,
 230                                            RTE_FLOW_ERROR_TYPE_ITEM, item,
 231                                            "Item's field is not supported");
 232                         return -rte_errno;
 233                 }
 234         }
 235
 236 exit:
 237         *spec_ptr = spec;
 238         *mask_ptr = mask;
 239         return 0;
 240 }
 241
 242 /*
 243  * Protocol parsers.
 244  * Masking is not supported, so masks in items should be either
 245  * full or empty (zeroed) and set only for supported fields which
 246  * are specified in the supp_mask.
 247  */
 248
 249 static int
 250 sfc_flow_parse_void(__rte_unused const struct rte_flow_item *item,
 251                     __rte_unused struct sfc_flow_parse_ctx *parse_ctx,
 252                     __rte_unused struct rte_flow_error *error)
 253 {
 254         return 0;
 255 }
 256
 257 /**
 258  * Convert Ethernet item to EFX filter specification.
 259  *
 260  * @param item[in]
 261  *   Item specification. Outer frame specification may only comprise
 262  *   source/destination addresses and Ethertype field.
 263  *   Inner frame specification may contain destination address only.
 264  *   There is support for individual/group mask as well as for empty and full.
 265  *   If the mask is NULL, default mask will be used. Ranging is not supported.
 266  * @param efx_spec[in, out]
 267  *   EFX filter specification to update.
 268  * @param[out] error
 269  *   Perform verbose error reporting if not NULL.
 270  */
 271 static int
 272 sfc_flow_parse_eth(const struct rte_flow_item *item,
 273                    struct sfc_flow_parse_ctx *parse_ctx,
 274                    struct rte_flow_error *error)
 275 {
 276         int rc;
 277         efx_filter_spec_t *efx_spec = parse_ctx->filter;
 278         const struct rte_flow_item_eth *spec = NULL;
 279         const struct rte_flow_item_eth *mask = NULL;
 280         const struct rte_flow_item_eth supp_mask = {
 281                 .dst.addr_bytes = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff },
 282                 .src.addr_bytes = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff },
 283                 .type = 0xffff,
 284         };
 285         const struct rte_flow_item_eth ifrm_supp_mask = {
 286                 .dst.addr_bytes = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff },
 287         };
 288         const uint8_t ig_mask[EFX_MAC_ADDR_LEN] = {
 289                 0x01, 0x00, 0x00, 0x00, 0x00, 0x00
 290         };
 291         const struct rte_flow_item_eth *supp_mask_p;
 292         const struct rte_flow_item_eth *def_mask_p;
 293         uint8_t *loc_mac = NULL;
 294         boolean_t is_ifrm = (efx_spec->efs_encap_type !=
 295                 EFX_TUNNEL_PROTOCOL_NONE);
 296
 297         if (is_ifrm) {
 298                 supp_mask_p = &ifrm_supp_mask;
 299                 def_mask_p = &ifrm_supp_mask;
 300                 loc_mac = efx_spec->efs_ifrm_loc_mac;
 301         } else {
 302                 supp_mask_p = &supp_mask;
 303                 def_mask_p = &rte_flow_item_eth_mask;
 304                 loc_mac = efx_spec->efs_loc_mac;
 305         }
 306
 307         rc = sfc_flow_parse_init(item,
 308                                  (const void **)&spec,
 309                                  (const void **)&mask,
 310                                  supp_mask_p, def_mask_p,
 311                                  sizeof(struct rte_flow_item_eth),
 312                                  error);
 313         if (rc != 0)
 314                 return rc;
 315
 316         /* If "spec" is not set, could be any Ethernet */
 317         if (spec == NULL)
 318                 return 0;
 319
 320         if (rte_is_same_ether_addr(&mask->dst, &supp_mask.dst)) {
 321                 efx_spec->efs_match_flags |= is_ifrm ?
 322                         EFX_FILTER_MATCH_IFRM_LOC_MAC :
 323                         EFX_FILTER_MATCH_LOC_MAC;
 324                 rte_memcpy(loc_mac, spec->dst.addr_bytes,
 325                            EFX_MAC_ADDR_LEN);
 326         } else if (memcmp(mask->dst.addr_bytes, ig_mask,
 327                           EFX_MAC_ADDR_LEN) == 0) {
 328                 if (rte_is_unicast_ether_addr(&spec->dst))
 329                         efx_spec->efs_match_flags |= is_ifrm ?
 330                                 EFX_FILTER_MATCH_IFRM_UNKNOWN_UCAST_DST :
 331                                 EFX_FILTER_MATCH_UNKNOWN_UCAST_DST;
 332                 else
 333                         efx_spec->efs_match_flags |= is_ifrm ?
 334                                 EFX_FILTER_MATCH_IFRM_UNKNOWN_MCAST_DST :
 335                                 EFX_FILTER_MATCH_UNKNOWN_MCAST_DST;
 336         } else if (!rte_is_zero_ether_addr(&mask->dst)) {
 337                 goto fail_bad_mask;
 338         }
 339
 340         /*
 341          * ifrm_supp_mask ensures that the source address and
 342          * ethertype masks are equal to zero in inner frame,
 343          * so these fields are filled in only for the outer frame
 344          */
 345         if (rte_is_same_ether_addr(&mask->src, &supp_mask.src)) {
 346                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_REM_MAC;
 347                 rte_memcpy(efx_spec->efs_rem_mac, spec->src.addr_bytes,
 348                            EFX_MAC_ADDR_LEN);
 349         } else if (!rte_is_zero_ether_addr(&mask->src)) {
 350                 goto fail_bad_mask;
 351         }
 352
 353         /*
 354          * Ether type is in big-endian byte order in item and
 355          * in little-endian in efx_spec, so byte swap is used
 356          */
 357         if (mask->type == supp_mask.type) {
 358                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_ETHER_TYPE;
 359                 efx_spec->efs_ether_type = rte_bswap16(spec->type);
 360         } else if (mask->type != 0) {
 361                 goto fail_bad_mask;
 362         }
 363
 364         return 0;
 365
 366 fail_bad_mask:
 367         rte_flow_error_set(error, EINVAL,
 368                            RTE_FLOW_ERROR_TYPE_ITEM, item,
 369                            "Bad mask in the ETH pattern item");
 370         return -rte_errno;
 371 }
 372
 373 /**
 374  * Convert VLAN item to EFX filter specification.
 375  *
 376  * @param item[in]
 377  *   Item specification. Only VID field is supported.
 378  *   The mask can not be NULL. Ranging is not supported.
 379  * @param efx_spec[in, out]
 380  *   EFX filter specification to update.
 381  * @param[out] error
 382  *   Perform verbose error reporting if not NULL.
 383  */
 384 static int
 385 sfc_flow_parse_vlan(const struct rte_flow_item *item,
 386                     struct sfc_flow_parse_ctx *parse_ctx,
 387                     struct rte_flow_error *error)
 388 {
 389         int rc;
 390         uint16_t vid;
 391         efx_filter_spec_t *efx_spec = parse_ctx->filter;
 392         const struct rte_flow_item_vlan *spec = NULL;
 393         const struct rte_flow_item_vlan *mask = NULL;
 394         const struct rte_flow_item_vlan supp_mask = {
 395                 .tci = rte_cpu_to_be_16(RTE_ETH_VLAN_ID_MAX),
 396                 .inner_type = RTE_BE16(0xffff),
 397         };
 398
 399         rc = sfc_flow_parse_init(item,
 400                                  (const void **)&spec,
 401                                  (const void **)&mask,
 402                                  &supp_mask,
 403                                  NULL,
 404                                  sizeof(struct rte_flow_item_vlan),
 405                                  error);
 406         if (rc != 0)
 407                 return rc;
 408
 409         /*
 410          * VID is in big-endian byte order in item and
 411          * in little-endian in efx_spec, so byte swap is used.
 412          * If two VLAN items are included, the first matches
 413          * the outer tag and the next matches the inner tag.
 414          */
 415         if (mask->tci == supp_mask.tci) {
 416                 /* Apply mask to keep VID only */
 417                 vid = rte_bswap16(spec->tci & mask->tci);
 418
 419                 if (!(efx_spec->efs_match_flags &
 420                       EFX_FILTER_MATCH_OUTER_VID)) {
 421                         efx_spec->efs_match_flags |= EFX_FILTER_MATCH_OUTER_VID;
 422                         efx_spec->efs_outer_vid = vid;
 423                 } else if (!(efx_spec->efs_match_flags &
 424                              EFX_FILTER_MATCH_INNER_VID)) {
 425                         efx_spec->efs_match_flags |= EFX_FILTER_MATCH_INNER_VID;
 426                         efx_spec->efs_inner_vid = vid;
 427                 } else {
 428                         rte_flow_error_set(error, EINVAL,
 429                                            RTE_FLOW_ERROR_TYPE_ITEM, item,
 430                                            "More than two VLAN items");
 431                         return -rte_errno;
 432                 }
 433         } else {
 434                 rte_flow_error_set(error, EINVAL,
 435                                    RTE_FLOW_ERROR_TYPE_ITEM, item,
 436                                    "VLAN ID in TCI match is required");
 437                 return -rte_errno;
 438         }
 439
 440         if (efx_spec->efs_match_flags & EFX_FILTER_MATCH_ETHER_TYPE) {
 441                 rte_flow_error_set(error, EINVAL,
 442                                    RTE_FLOW_ERROR_TYPE_ITEM, item,
 443                                    "VLAN TPID matching is not supported");
 444                 return -rte_errno;
 445         }
 446         if (mask->inner_type == supp_mask.inner_type) {
 447                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_ETHER_TYPE;
 448                 efx_spec->efs_ether_type = rte_bswap16(spec->inner_type);
 449         } else if (mask->inner_type) {
 450                 rte_flow_error_set(error, EINVAL,
 451                                    RTE_FLOW_ERROR_TYPE_ITEM, item,
 452                                    "Bad mask for VLAN inner_type");
 453                 return -rte_errno;
 454         }
 455
 456         return 0;
 457 }
 458
 459 /**
 460  * Convert IPv4 item to EFX filter specification.
 461  *
 462  * @param item[in]
 463  *   Item specification. Only source and destination addresses and
 464  *   protocol fields are supported. If the mask is NULL, default
 465  *   mask will be used. Ranging is not supported.
 466  * @param efx_spec[in, out]
 467  *   EFX filter specification to update.
 468  * @param[out] error
 469  *   Perform verbose error reporting if not NULL.
 470  */
 471 static int
 472 sfc_flow_parse_ipv4(const struct rte_flow_item *item,
 473                     struct sfc_flow_parse_ctx *parse_ctx,
 474                     struct rte_flow_error *error)
 475 {
 476         int rc;
 477         efx_filter_spec_t *efx_spec = parse_ctx->filter;
 478         const struct rte_flow_item_ipv4 *spec = NULL;
 479         const struct rte_flow_item_ipv4 *mask = NULL;
 480         const uint16_t ether_type_ipv4 = rte_cpu_to_le_16(EFX_ETHER_TYPE_IPV4);
 481         const struct rte_flow_item_ipv4 supp_mask = {
 482                 .hdr = {
 483                         .src_addr = 0xffffffff,
 484                         .dst_addr = 0xffffffff,
 485                         .next_proto_id = 0xff,
 486                 }
 487         };
 488
 489         rc = sfc_flow_parse_init(item,
 490                                  (const void **)&spec,
 491                                  (const void **)&mask,
 492                                  &supp_mask,
 493                                  &rte_flow_item_ipv4_mask,
 494                                  sizeof(struct rte_flow_item_ipv4),
 495                                  error);
 496         if (rc != 0)
 497                 return rc;
 498
 499         /*
 500          * Filtering by IPv4 source and destination addresses requires
 501          * the appropriate ETHER_TYPE in hardware filters
 502          */
 503         if (!(efx_spec->efs_match_flags & EFX_FILTER_MATCH_ETHER_TYPE)) {
 504                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_ETHER_TYPE;
 505                 efx_spec->efs_ether_type = ether_type_ipv4;
 506         } else if (efx_spec->efs_ether_type != ether_type_ipv4) {
 507                 rte_flow_error_set(error, EINVAL,
 508                         RTE_FLOW_ERROR_TYPE_ITEM, item,
 509                         "Ethertype in pattern with IPV4 item should be appropriate");
 510                 return -rte_errno;
 511         }
 512
 513         if (spec == NULL)
 514                 return 0;
 515
 516         /*
 517          * IPv4 addresses are in big-endian byte order in item and in
 518          * efx_spec
 519          */
 520         if (mask->hdr.src_addr == supp_mask.hdr.src_addr) {
 521                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_REM_HOST;
 522                 efx_spec->efs_rem_host.eo_u32[0] = spec->hdr.src_addr;
 523         } else if (mask->hdr.src_addr != 0) {
 524                 goto fail_bad_mask;
 525         }
 526
 527         if (mask->hdr.dst_addr == supp_mask.hdr.dst_addr) {
 528                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_LOC_HOST;
 529                 efx_spec->efs_loc_host.eo_u32[0] = spec->hdr.dst_addr;
 530         } else if (mask->hdr.dst_addr != 0) {
 531                 goto fail_bad_mask;
 532         }
 533
 534         if (mask->hdr.next_proto_id == supp_mask.hdr.next_proto_id) {
 535                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_IP_PROTO;
 536                 efx_spec->efs_ip_proto = spec->hdr.next_proto_id;
 537         } else if (mask->hdr.next_proto_id != 0) {
 538                 goto fail_bad_mask;
 539         }
 540
 541         return 0;
 542
 543 fail_bad_mask:
 544         rte_flow_error_set(error, EINVAL,
 545                            RTE_FLOW_ERROR_TYPE_ITEM, item,
 546                            "Bad mask in the IPV4 pattern item");
 547         return -rte_errno;
 548 }
 549
 550 /**
 551  * Convert IPv6 item to EFX filter specification.
 552  *
 553  * @param item[in]
 554  *   Item specification. Only source and destination addresses and
 555  *   next header fields are supported. If the mask is NULL, default
 556  *   mask will be used. Ranging is not supported.
 557  * @param efx_spec[in, out]
 558  *   EFX filter specification to update.
 559  * @param[out] error
 560  *   Perform verbose error reporting if not NULL.
 561  */
 562 static int
 563 sfc_flow_parse_ipv6(const struct rte_flow_item *item,
 564                     struct sfc_flow_parse_ctx *parse_ctx,
 565                     struct rte_flow_error *error)
 566 {
 567         int rc;
 568         efx_filter_spec_t *efx_spec = parse_ctx->filter;
 569         const struct rte_flow_item_ipv6 *spec = NULL;
 570         const struct rte_flow_item_ipv6 *mask = NULL;
 571         const uint16_t ether_type_ipv6 = rte_cpu_to_le_16(EFX_ETHER_TYPE_IPV6);
 572         const struct rte_flow_item_ipv6 supp_mask = {
 573                 .hdr = {
 574                         .src_addr = { 0xff, 0xff, 0xff, 0xff,
 575                                       0xff, 0xff, 0xff, 0xff,
 576                                       0xff, 0xff, 0xff, 0xff,
 577                                       0xff, 0xff, 0xff, 0xff },
 578                         .dst_addr = { 0xff, 0xff, 0xff, 0xff,
 579                                       0xff, 0xff, 0xff, 0xff,
 580                                       0xff, 0xff, 0xff, 0xff,
 581                                       0xff, 0xff, 0xff, 0xff },
 582                         .proto = 0xff,
 583                 }
 584         };
 585
 586         rc = sfc_flow_parse_init(item,
 587                                  (const void **)&spec,
 588                                  (const void **)&mask,
 589                                  &supp_mask,
 590                                  &rte_flow_item_ipv6_mask,
 591                                  sizeof(struct rte_flow_item_ipv6),
 592                                  error);
 593         if (rc != 0)
 594                 return rc;
 595
 596         /*
 597          * Filtering by IPv6 source and destination addresses requires
 598          * the appropriate ETHER_TYPE in hardware filters
 599          */
 600         if (!(efx_spec->efs_match_flags & EFX_FILTER_MATCH_ETHER_TYPE)) {
 601                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_ETHER_TYPE;
 602                 efx_spec->efs_ether_type = ether_type_ipv6;
 603         } else if (efx_spec->efs_ether_type != ether_type_ipv6) {
 604                 rte_flow_error_set(error, EINVAL,
 605                         RTE_FLOW_ERROR_TYPE_ITEM, item,
 606                         "Ethertype in pattern with IPV6 item should be appropriate");
 607                 return -rte_errno;
 608         }
 609
 610         if (spec == NULL)
 611                 return 0;
 612
 613         /*
 614          * IPv6 addresses are in big-endian byte order in item and in
 615          * efx_spec
 616          */
 617         if (memcmp(mask->hdr.src_addr, supp_mask.hdr.src_addr,
 618                    sizeof(mask->hdr.src_addr)) == 0) {
 619                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_REM_HOST;
 620
 621                 RTE_BUILD_BUG_ON(sizeof(efx_spec->efs_rem_host) !=
 622                                  sizeof(spec->hdr.src_addr));
 623                 rte_memcpy(&efx_spec->efs_rem_host, spec->hdr.src_addr,
 624                            sizeof(efx_spec->efs_rem_host));
 625         } else if (!sfc_flow_is_zero(mask->hdr.src_addr,
 626                                      sizeof(mask->hdr.src_addr))) {
 627                 goto fail_bad_mask;
 628         }
 629
 630         if (memcmp(mask->hdr.dst_addr, supp_mask.hdr.dst_addr,
 631                    sizeof(mask->hdr.dst_addr)) == 0) {
 632                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_LOC_HOST;
 633
 634                 RTE_BUILD_BUG_ON(sizeof(efx_spec->efs_loc_host) !=
 635                                  sizeof(spec->hdr.dst_addr));
 636                 rte_memcpy(&efx_spec->efs_loc_host, spec->hdr.dst_addr,
 637                            sizeof(efx_spec->efs_loc_host));
 638         } else if (!sfc_flow_is_zero(mask->hdr.dst_addr,
 639                                      sizeof(mask->hdr.dst_addr))) {
 640                 goto fail_bad_mask;
 641         }
 642
 643         if (mask->hdr.proto == supp_mask.hdr.proto) {
 644                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_IP_PROTO;
 645                 efx_spec->efs_ip_proto = spec->hdr.proto;
 646         } else if (mask->hdr.proto != 0) {
 647                 goto fail_bad_mask;
 648         }
 649
 650         return 0;
 651
 652 fail_bad_mask:
 653         rte_flow_error_set(error, EINVAL,
 654                            RTE_FLOW_ERROR_TYPE_ITEM, item,
 655                            "Bad mask in the IPV6 pattern item");
 656         return -rte_errno;
 657 }
 658
 659 /**
 660  * Convert TCP item to EFX filter specification.
 661  *
 662  * @param item[in]
 663  *   Item specification. Only source and destination ports fields
 664  *   are supported. If the mask is NULL, default mask will be used.
 665  *   Ranging is not supported.
 666  * @param efx_spec[in, out]
 667  *   EFX filter specification to update.
 668  * @param[out] error
 669  *   Perform verbose error reporting if not NULL.
 670  */
 671 static int
 672 sfc_flow_parse_tcp(const struct rte_flow_item *item,
 673                    struct sfc_flow_parse_ctx *parse_ctx,
 674                    struct rte_flow_error *error)
 675 {
 676         int rc;
 677         efx_filter_spec_t *efx_spec = parse_ctx->filter;
 678         const struct rte_flow_item_tcp *spec = NULL;
 679         const struct rte_flow_item_tcp *mask = NULL;
 680         const struct rte_flow_item_tcp supp_mask = {
 681                 .hdr = {
 682                         .src_port = 0xffff,
 683                         .dst_port = 0xffff,
 684                 }
 685         };
 686
 687         rc = sfc_flow_parse_init(item,
 688                                  (const void **)&spec,
 689                                  (const void **)&mask,
 690                                  &supp_mask,
 691                                  &rte_flow_item_tcp_mask,
 692                                  sizeof(struct rte_flow_item_tcp),
 693                                  error);
 694         if (rc != 0)
 695                 return rc;
 696
 697         /*
 698          * Filtering by TCP source and destination ports requires
 699          * the appropriate IP_PROTO in hardware filters
 700          */
 701         if (!(efx_spec->efs_match_flags & EFX_FILTER_MATCH_IP_PROTO)) {
 702                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_IP_PROTO;
 703                 efx_spec->efs_ip_proto = EFX_IPPROTO_TCP;
 704         } else if (efx_spec->efs_ip_proto != EFX_IPPROTO_TCP) {
 705                 rte_flow_error_set(error, EINVAL,
 706                         RTE_FLOW_ERROR_TYPE_ITEM, item,
 707                         "IP proto in pattern with TCP item should be appropriate");
 708                 return -rte_errno;
 709         }
 710
 711         if (spec == NULL)
 712                 return 0;
 713
 714         /*
 715          * Source and destination ports are in big-endian byte order in item and
 716          * in little-endian in efx_spec, so byte swap is used
 717          */
 718         if (mask->hdr.src_port == supp_mask.hdr.src_port) {
 719                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_REM_PORT;
 720                 efx_spec->efs_rem_port = rte_bswap16(spec->hdr.src_port);
 721         } else if (mask->hdr.src_port != 0) {
 722                 goto fail_bad_mask;
 723         }
 724
 725         if (mask->hdr.dst_port == supp_mask.hdr.dst_port) {
 726                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_LOC_PORT;
 727                 efx_spec->efs_loc_port = rte_bswap16(spec->hdr.dst_port);
 728         } else if (mask->hdr.dst_port != 0) {
 729                 goto fail_bad_mask;
 730         }
 731
 732         return 0;
 733
 734 fail_bad_mask:
 735         rte_flow_error_set(error, EINVAL,
 736                            RTE_FLOW_ERROR_TYPE_ITEM, item,
 737                            "Bad mask in the TCP pattern item");
 738         return -rte_errno;
 739 }
 740
 741 /**
 742  * Convert UDP item to EFX filter specification.
 743  *
 744  * @param item[in]
 745  *   Item specification. Only source and destination ports fields
 746  *   are supported. If the mask is NULL, default mask will be used.
 747  *   Ranging is not supported.
 748  * @param efx_spec[in, out]
 749  *   EFX filter specification to update.
 750  * @param[out] error
 751  *   Perform verbose error reporting if not NULL.
 752  */
 753 static int
 754 sfc_flow_parse_udp(const struct rte_flow_item *item,
 755                    struct sfc_flow_parse_ctx *parse_ctx,
 756                    struct rte_flow_error *error)
 757 {
 758         int rc;
 759         efx_filter_spec_t *efx_spec = parse_ctx->filter;
 760         const struct rte_flow_item_udp *spec = NULL;
 761         const struct rte_flow_item_udp *mask = NULL;
 762         const struct rte_flow_item_udp supp_mask = {
 763                 .hdr = {
 764                         .src_port = 0xffff,
 765                         .dst_port = 0xffff,
 766                 }
 767         };
 768
 769         rc = sfc_flow_parse_init(item,
 770                                  (const void **)&spec,
 771                                  (const void **)&mask,
 772                                  &supp_mask,
 773                                  &rte_flow_item_udp_mask,
 774                                  sizeof(struct rte_flow_item_udp),
 775                                  error);
 776         if (rc != 0)
 777                 return rc;
 778
 779         /*
 780          * Filtering by UDP source and destination ports requires
 781          * the appropriate IP_PROTO in hardware filters
 782          */
 783         if (!(efx_spec->efs_match_flags & EFX_FILTER_MATCH_IP_PROTO)) {
 784                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_IP_PROTO;
 785                 efx_spec->efs_ip_proto = EFX_IPPROTO_UDP;
 786         } else if (efx_spec->efs_ip_proto != EFX_IPPROTO_UDP) {
 787                 rte_flow_error_set(error, EINVAL,
 788                         RTE_FLOW_ERROR_TYPE_ITEM, item,
 789                         "IP proto in pattern with UDP item should be appropriate");
 790                 return -rte_errno;
 791         }
 792
 793         if (spec == NULL)
 794                 return 0;
 795
 796         /*
 797          * Source and destination ports are in big-endian byte order in item and
 798          * in little-endian in efx_spec, so byte swap is used
 799          */
 800         if (mask->hdr.src_port == supp_mask.hdr.src_port) {
 801                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_REM_PORT;
 802                 efx_spec->efs_rem_port = rte_bswap16(spec->hdr.src_port);
 803         } else if (mask->hdr.src_port != 0) {
 804                 goto fail_bad_mask;
 805         }
 806
 807         if (mask->hdr.dst_port == supp_mask.hdr.dst_port) {
 808                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_LOC_PORT;
 809                 efx_spec->efs_loc_port = rte_bswap16(spec->hdr.dst_port);
 810         } else if (mask->hdr.dst_port != 0) {
 811                 goto fail_bad_mask;
 812         }
 813
 814         return 0;
 815
 816 fail_bad_mask:
 817         rte_flow_error_set(error, EINVAL,
 818                            RTE_FLOW_ERROR_TYPE_ITEM, item,
 819                            "Bad mask in the UDP pattern item");
 820         return -rte_errno;
 821 }
 822
 823 /*
 824  * Filters for encapsulated packets match based on the EtherType and IP
 825  * protocol in the outer frame.
 826  */
 827 static int
 828 sfc_flow_set_match_flags_for_encap_pkts(const struct rte_flow_item *item,
 829                                         efx_filter_spec_t *efx_spec,
 830                                         uint8_t ip_proto,
 831                                         struct rte_flow_error *error)
 832 {
 833         if (!(efx_spec->efs_match_flags & EFX_FILTER_MATCH_IP_PROTO)) {
 834                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_IP_PROTO;
 835                 efx_spec->efs_ip_proto = ip_proto;
 836         } else if (efx_spec->efs_ip_proto != ip_proto) {
 837                 switch (ip_proto) {
 838                 case EFX_IPPROTO_UDP:
 839                         rte_flow_error_set(error, EINVAL,
 840                                 RTE_FLOW_ERROR_TYPE_ITEM, item,
 841                                 "Outer IP header protocol must be UDP "
 842                                 "in VxLAN/GENEVE pattern");
 843                         return -rte_errno;
 844
 845                 case EFX_IPPROTO_GRE:
 846                         rte_flow_error_set(error, EINVAL,
 847                                 RTE_FLOW_ERROR_TYPE_ITEM, item,
 848                                 "Outer IP header protocol must be GRE "
 849                                 "in NVGRE pattern");
 850                         return -rte_errno;
 851
 852                 default:
 853                         rte_flow_error_set(error, EINVAL,
 854                                 RTE_FLOW_ERROR_TYPE_ITEM, item,
 855                                 "Only VxLAN/GENEVE/NVGRE tunneling patterns "
 856                                 "are supported");
 857                         return -rte_errno;
 858                 }
 859         }
 860
 861         if (efx_spec->efs_match_flags & EFX_FILTER_MATCH_ETHER_TYPE &&
 862             efx_spec->efs_ether_type != EFX_ETHER_TYPE_IPV4 &&
 863             efx_spec->efs_ether_type != EFX_ETHER_TYPE_IPV6) {
 864                 rte_flow_error_set(error, EINVAL,
 865                         RTE_FLOW_ERROR_TYPE_ITEM, item,
 866                         "Outer frame EtherType in pattern with tunneling "
 867                         "must be IPv4 or IPv6");
 868                 return -rte_errno;
 869         }
 870
 871         return 0;
 872 }
 873
 874 static int
 875 sfc_flow_set_efx_spec_vni_or_vsid(efx_filter_spec_t *efx_spec,
 876                                   const uint8_t *vni_or_vsid_val,
 877                                   const uint8_t *vni_or_vsid_mask,
 878                                   const struct rte_flow_item *item,
 879                                   struct rte_flow_error *error)
 880 {
 881         const uint8_t vni_or_vsid_full_mask[EFX_VNI_OR_VSID_LEN] = {
 882                 0xff, 0xff, 0xff
 883         };
 884
 885         if (memcmp(vni_or_vsid_mask, vni_or_vsid_full_mask,
 886                    EFX_VNI_OR_VSID_LEN) == 0) {
 887                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_VNI_OR_VSID;
 888                 rte_memcpy(efx_spec->efs_vni_or_vsid, vni_or_vsid_val,
 889                            EFX_VNI_OR_VSID_LEN);
 890         } else if (!sfc_flow_is_zero(vni_or_vsid_mask, EFX_VNI_OR_VSID_LEN)) {
 891                 rte_flow_error_set(error, EINVAL,
 892                                    RTE_FLOW_ERROR_TYPE_ITEM, item,
 893                                    "Unsupported VNI/VSID mask");
 894                 return -rte_errno;
 895         }
 896
 897         return 0;
 898 }
 899
 900 /**
 901  * Convert VXLAN item to EFX filter specification.
 902  *
 903  * @param item[in]
 904  *   Item specification. Only VXLAN network identifier field is supported.
 905  *   If the mask is NULL, default mask will be used.
 906  *   Ranging is not supported.
 907  * @param efx_spec[in, out]
 908  *   EFX filter specification to update.
 909  * @param[out] error
 910  *   Perform verbose error reporting if not NULL.
 911  */
 912 static int
 913 sfc_flow_parse_vxlan(const struct rte_flow_item *item,
 914                      struct sfc_flow_parse_ctx *parse_ctx,
 915                      struct rte_flow_error *error)
 916 {
 917         int rc;
 918         efx_filter_spec_t *efx_spec = parse_ctx->filter;
 919         const struct rte_flow_item_vxlan *spec = NULL;
 920         const struct rte_flow_item_vxlan *mask = NULL;
 921         const struct rte_flow_item_vxlan supp_mask = {
 922                 .vni = { 0xff, 0xff, 0xff }
 923         };
 924
 925         rc = sfc_flow_parse_init(item,
 926                                  (const void **)&spec,
 927                                  (const void **)&mask,
 928                                  &supp_mask,
 929                                  &rte_flow_item_vxlan_mask,
 930                                  sizeof(struct rte_flow_item_vxlan),
 931                                  error);
 932         if (rc != 0)
 933                 return rc;
 934
 935         rc = sfc_flow_set_match_flags_for_encap_pkts(item, efx_spec,
 936                                                      EFX_IPPROTO_UDP, error);
 937         if (rc != 0)
 938                 return rc;
 939
 940         efx_spec->efs_encap_type = EFX_TUNNEL_PROTOCOL_VXLAN;
 941         efx_spec->efs_match_flags |= EFX_FILTER_MATCH_ENCAP_TYPE;
 942
 943         if (spec == NULL)
 944                 return 0;
 945
 946         rc = sfc_flow_set_efx_spec_vni_or_vsid(efx_spec, spec->vni,
 947                                                mask->vni, item, error);
 948
 949         return rc;
 950 }
 951
 952 /**
 953  * Convert GENEVE item to EFX filter specification.
 954  *
 955  * @param item[in]
 956  *   Item specification. Only Virtual Network Identifier and protocol type
 957  *   fields are supported. But protocol type can be only Ethernet (0x6558).
 958  *   If the mask is NULL, default mask will be used.
 959  *   Ranging is not supported.
 960  * @param efx_spec[in, out]
 961  *   EFX filter specification to update.
 962  * @param[out] error
 963  *   Perform verbose error reporting if not NULL.
 964  */
 965 static int
 966 sfc_flow_parse_geneve(const struct rte_flow_item *item,
 967                       struct sfc_flow_parse_ctx *parse_ctx,
 968                       struct rte_flow_error *error)
 969 {
 970         int rc;
 971         efx_filter_spec_t *efx_spec = parse_ctx->filter;
 972         const struct rte_flow_item_geneve *spec = NULL;
 973         const struct rte_flow_item_geneve *mask = NULL;
 974         const struct rte_flow_item_geneve supp_mask = {
 975                 .protocol = RTE_BE16(0xffff),
 976                 .vni = { 0xff, 0xff, 0xff }
 977         };
 978
 979         rc = sfc_flow_parse_init(item,
 980                                  (const void **)&spec,
 981                                  (const void **)&mask,
 982                                  &supp_mask,
 983                                  &rte_flow_item_geneve_mask,
 984                                  sizeof(struct rte_flow_item_geneve),
 985                                  error);
 986         if (rc != 0)
 987                 return rc;
 988
 989         rc = sfc_flow_set_match_flags_for_encap_pkts(item, efx_spec,
 990                                                      EFX_IPPROTO_UDP, error);
 991         if (rc != 0)
 992                 return rc;
 993
 994         efx_spec->efs_encap_type = EFX_TUNNEL_PROTOCOL_GENEVE;
 995         efx_spec->efs_match_flags |= EFX_FILTER_MATCH_ENCAP_TYPE;
 996
 997         if (spec == NULL)
 998                 return 0;
 999
1000         if (mask->protocol == supp_mask.protocol) {
1001                 if (spec->protocol != rte_cpu_to_be_16(RTE_ETHER_TYPE_TEB)) {
1002                         rte_flow_error_set(error, EINVAL,
1003                                 RTE_FLOW_ERROR_TYPE_ITEM, item,
1004                                 "GENEVE encap. protocol must be Ethernet "
1005                                 "(0x6558) in the GENEVE pattern item");
1006                         return -rte_errno;
1007                 }
1008         } else if (mask->protocol != 0) {
1009                 rte_flow_error_set(error, EINVAL,
1010                         RTE_FLOW_ERROR_TYPE_ITEM, item,
1011                         "Unsupported mask for GENEVE encap. protocol");
1012                 return -rte_errno;
1013         }
1014
1015         rc = sfc_flow_set_efx_spec_vni_or_vsid(efx_spec, spec->vni,
1016                                                mask->vni, item, error);
1017
1018         return rc;
1019 }
1020
1021 /**
1022  * Convert NVGRE item to EFX filter specification.
1023  *
1024  * @param item[in]
1025  *   Item specification. Only virtual subnet ID field is supported.
1026  *   If the mask is NULL, default mask will be used.
1027  *   Ranging is not supported.
1028  * @param efx_spec[in, out]
1029  *   EFX filter specification to update.
1030  * @param[out] error
1031  *   Perform verbose error reporting if not NULL.
1032  */
1033 static int
1034 sfc_flow_parse_nvgre(const struct rte_flow_item *item,
1035                      struct sfc_flow_parse_ctx *parse_ctx,
1036                      struct rte_flow_error *error)
1037 {
1038         int rc;
1039         efx_filter_spec_t *efx_spec = parse_ctx->filter;
1040         const struct rte_flow_item_nvgre *spec = NULL;
1041         const struct rte_flow_item_nvgre *mask = NULL;
1042         const struct rte_flow_item_nvgre supp_mask = {
1043                 .tni = { 0xff, 0xff, 0xff }
1044         };
1045
1046         rc = sfc_flow_parse_init(item,
1047                                  (const void **)&spec,
1048                                  (const void **)&mask,
1049                                  &supp_mask,
1050                                  &rte_flow_item_nvgre_mask,
1051                                  sizeof(struct rte_flow_item_nvgre),
1052                                  error);
1053         if (rc != 0)
1054                 return rc;
1055
1056         rc = sfc_flow_set_match_flags_for_encap_pkts(item, efx_spec,
1057                                                      EFX_IPPROTO_GRE, error);
1058         if (rc != 0)
1059                 return rc;
1060
1061         efx_spec->efs_encap_type = EFX_TUNNEL_PROTOCOL_NVGRE;
1062         efx_spec->efs_match_flags |= EFX_FILTER_MATCH_ENCAP_TYPE;
1063
1064         if (spec == NULL)
1065                 return 0;
1066
1067         rc = sfc_flow_set_efx_spec_vni_or_vsid(efx_spec, spec->tni,
1068                                                mask->tni, item, error);
1069
1070         return rc;
1071 }
1072
1073 /**
1074  * Convert PPPoEx item to EFX filter specification.
1075  *
1076  * @param item[in]
1077  *   Item specification.
1078  *   Matching on PPPoEx fields is not supported.
1079  *   This item can only be used to set or validate the EtherType filter.
1080  *   Only zero masks are allowed.
1081  *   Ranging is not supported.
1082  * @param efx_spec[in, out]
1083  *   EFX filter specification to update.
1084  * @param[out] error
1085  *   Perform verbose error reporting if not NULL.
1086  */
1087 static int
1088 sfc_flow_parse_pppoex(const struct rte_flow_item *item,
1089                       struct sfc_flow_parse_ctx *parse_ctx,
1090                       struct rte_flow_error *error)
1091 {
1092         efx_filter_spec_t *efx_spec = parse_ctx->filter;
1093         const struct rte_flow_item_pppoe *spec = NULL;
1094         const struct rte_flow_item_pppoe *mask = NULL;
1095         const struct rte_flow_item_pppoe supp_mask = {};
1096         const struct rte_flow_item_pppoe def_mask = {};
1097         uint16_t ether_type;
1098         int rc;
1099
1100         rc = sfc_flow_parse_init(item,
1101                                  (const void **)&spec,
1102                                  (const void **)&mask,
1103                                  &supp_mask,
1104                                  &def_mask,
1105                                  sizeof(struct rte_flow_item_pppoe),
1106                                  error);
1107         if (rc != 0)
1108                 return rc;
1109
1110         if (item->type == RTE_FLOW_ITEM_TYPE_PPPOED)
1111                 ether_type = RTE_ETHER_TYPE_PPPOE_DISCOVERY;
1112         else
1113                 ether_type = RTE_ETHER_TYPE_PPPOE_SESSION;
1114
1115         if ((efx_spec->efs_match_flags & EFX_FILTER_MATCH_ETHER_TYPE) != 0) {
1116                 if (efx_spec->efs_ether_type != ether_type) {
1117                         rte_flow_error_set(error, EINVAL,
1118                                            RTE_FLOW_ERROR_TYPE_ITEM, item,
1119                                            "Invalid EtherType for a PPPoE flow item");
1120                         return -rte_errno;
1121                 }
1122         } else {
1123                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_ETHER_TYPE;
1124                 efx_spec->efs_ether_type = ether_type;
1125         }
1126
1127         return 0;
1128 }
1129
1130 static const struct sfc_flow_item sfc_flow_items[] = {
1131         {
1132                 .type = RTE_FLOW_ITEM_TYPE_VOID,
1133                 .name = "VOID",
1134                 .prev_layer = SFC_FLOW_ITEM_ANY_LAYER,
1135                 .layer = SFC_FLOW_ITEM_ANY_LAYER,
1136                 .ctx_type = SFC_FLOW_PARSE_CTX_FILTER,
1137                 .parse = sfc_flow_parse_void,
1138         },
1139         {
1140                 .type = RTE_FLOW_ITEM_TYPE_ETH,
1141                 .name = "ETH",
1142                 .prev_layer = SFC_FLOW_ITEM_START_LAYER,
1143                 .layer = SFC_FLOW_ITEM_L2,
1144                 .ctx_type = SFC_FLOW_PARSE_CTX_FILTER,
1145                 .parse = sfc_flow_parse_eth,
1146         },
1147         {
1148                 .type = RTE_FLOW_ITEM_TYPE_VLAN,
1149                 .name = "VLAN",
1150                 .prev_layer = SFC_FLOW_ITEM_L2,
1151                 .layer = SFC_FLOW_ITEM_L2,
1152                 .ctx_type = SFC_FLOW_PARSE_CTX_FILTER,
1153                 .parse = sfc_flow_parse_vlan,
1154         },
1155         {
1156                 .type = RTE_FLOW_ITEM_TYPE_PPPOED,
1157                 .name = "PPPOED",
1158                 .prev_layer = SFC_FLOW_ITEM_L2,
1159                 .layer = SFC_FLOW_ITEM_L2,
1160                 .ctx_type = SFC_FLOW_PARSE_CTX_FILTER,
1161                 .parse = sfc_flow_parse_pppoex,
1162         },
1163         {
1164                 .type = RTE_FLOW_ITEM_TYPE_PPPOES,
1165                 .name = "PPPOES",
1166                 .prev_layer = SFC_FLOW_ITEM_L2,
1167                 .layer = SFC_FLOW_ITEM_L2,
1168                 .ctx_type = SFC_FLOW_PARSE_CTX_FILTER,
1169                 .parse = sfc_flow_parse_pppoex,
1170         },
1171         {
1172                 .type = RTE_FLOW_ITEM_TYPE_IPV4,
1173                 .name = "IPV4",
1174                 .prev_layer = SFC_FLOW_ITEM_L2,
1175                 .layer = SFC_FLOW_ITEM_L3,
1176                 .ctx_type = SFC_FLOW_PARSE_CTX_FILTER,
1177                 .parse = sfc_flow_parse_ipv4,
1178         },
1179         {
1180                 .type = RTE_FLOW_ITEM_TYPE_IPV6,
1181                 .name = "IPV6",
1182                 .prev_layer = SFC_FLOW_ITEM_L2,
1183                 .layer = SFC_FLOW_ITEM_L3,
1184                 .ctx_type = SFC_FLOW_PARSE_CTX_FILTER,
1185                 .parse = sfc_flow_parse_ipv6,
1186         },
1187         {
1188                 .type = RTE_FLOW_ITEM_TYPE_TCP,
1189                 .name = "TCP",
1190                 .prev_layer = SFC_FLOW_ITEM_L3,
1191                 .layer = SFC_FLOW_ITEM_L4,
1192                 .ctx_type = SFC_FLOW_PARSE_CTX_FILTER,
1193                 .parse = sfc_flow_parse_tcp,
1194         },
1195         {
1196                 .type = RTE_FLOW_ITEM_TYPE_UDP,
1197                 .name = "UDP",
1198                 .prev_layer = SFC_FLOW_ITEM_L3,
1199                 .layer = SFC_FLOW_ITEM_L4,
1200                 .ctx_type = SFC_FLOW_PARSE_CTX_FILTER,
1201                 .parse = sfc_flow_parse_udp,
1202         },
1203         {
1204                 .type = RTE_FLOW_ITEM_TYPE_VXLAN,
1205                 .name = "VXLAN",
1206                 .prev_layer = SFC_FLOW_ITEM_L4,
1207                 .layer = SFC_FLOW_ITEM_START_LAYER,
1208                 .ctx_type = SFC_FLOW_PARSE_CTX_FILTER,
1209                 .parse = sfc_flow_parse_vxlan,
1210         },
1211         {
1212                 .type = RTE_FLOW_ITEM_TYPE_GENEVE,
1213                 .name = "GENEVE",
1214                 .prev_layer = SFC_FLOW_ITEM_L4,
1215                 .layer = SFC_FLOW_ITEM_START_LAYER,
1216                 .ctx_type = SFC_FLOW_PARSE_CTX_FILTER,
1217                 .parse = sfc_flow_parse_geneve,
1218         },
1219         {
1220                 .type = RTE_FLOW_ITEM_TYPE_NVGRE,
1221                 .name = "NVGRE",
1222                 .prev_layer = SFC_FLOW_ITEM_L3,
1223                 .layer = SFC_FLOW_ITEM_START_LAYER,
1224                 .ctx_type = SFC_FLOW_PARSE_CTX_FILTER,
1225                 .parse = sfc_flow_parse_nvgre,
1226         },
1227 };
1228
1229 /*
1230  * Protocol-independent flow API support
1231  */
1232 static int
1233 sfc_flow_parse_attr(struct sfc_adapter *sa,
1234                     const struct rte_flow_attr *attr,
1235                     struct rte_flow *flow,
1236                     struct rte_flow_error *error)
1237 {
1238         struct sfc_flow_spec *spec = &flow->spec;
1239         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
1240         struct sfc_flow_spec_mae *spec_mae = &spec->mae;
1241         struct sfc_mae *mae = &sa->mae;
1242
1243         if (attr == NULL) {
1244                 rte_flow_error_set(error, EINVAL,
1245                                    RTE_FLOW_ERROR_TYPE_ATTR, NULL,
1246                                    "NULL attribute");
1247                 return -rte_errno;
1248         }
1249         if (attr->group != 0) {
1250                 rte_flow_error_set(error, ENOTSUP,
1251                                    RTE_FLOW_ERROR_TYPE_ATTR_GROUP, attr,
1252                                    "Groups are not supported");
1253                 return -rte_errno;
1254         }
1255         if (attr->egress != 0 && attr->transfer == 0) {
1256                 rte_flow_error_set(error, ENOTSUP,
1257                                    RTE_FLOW_ERROR_TYPE_ATTR_EGRESS, attr,
1258                                    "Egress is not supported");
1259                 return -rte_errno;
1260         }
1261         if (attr->ingress == 0 && attr->transfer == 0) {
1262                 rte_flow_error_set(error, ENOTSUP,
1263                                    RTE_FLOW_ERROR_TYPE_ATTR_INGRESS, attr,
1264                                    "Ingress is compulsory");
1265                 return -rte_errno;
1266         }
1267         if (attr->transfer == 0) {
1268                 if (attr->priority != 0) {
1269                         rte_flow_error_set(error, ENOTSUP,
1270                                            RTE_FLOW_ERROR_TYPE_ATTR_PRIORITY,
1271                                            attr, "Priorities are unsupported");
1272                         return -rte_errno;
1273                 }
1274                 spec->type = SFC_FLOW_SPEC_FILTER;
1275                 spec_filter->template.efs_flags |= EFX_FILTER_FLAG_RX;
1276                 spec_filter->template.efs_rss_context = EFX_RSS_CONTEXT_DEFAULT;
1277                 spec_filter->template.efs_priority = EFX_FILTER_PRI_MANUAL;
1278         } else {
1279                 if (mae->status != SFC_MAE_STATUS_ADMIN) {
1280                         rte_flow_error_set(error, ENOTSUP,
1281                                            RTE_FLOW_ERROR_TYPE_ATTR_TRANSFER,
1282                                            attr, "Transfer is not supported");
1283                         return -rte_errno;
1284                 }
1285                 if (attr->priority > mae->nb_action_rule_prios_max) {
1286                         rte_flow_error_set(error, ENOTSUP,
1287                                            RTE_FLOW_ERROR_TYPE_ATTR_PRIORITY,
1288                                            attr, "Unsupported priority level");
1289                         return -rte_errno;
1290                 }
1291                 spec->type = SFC_FLOW_SPEC_MAE;
1292                 spec_mae->priority = attr->priority;
1293                 spec_mae->match_spec = NULL;
1294                 spec_mae->action_set = NULL;
1295                 spec_mae->rule_id.id = EFX_MAE_RSRC_ID_INVALID;
1296         }
1297
1298         return 0;
1299 }
1300
1301 /* Get item from array sfc_flow_items */
1302 static const struct sfc_flow_item *
1303 sfc_flow_get_item(const struct sfc_flow_item *items,
1304                   unsigned int nb_items,
1305                   enum rte_flow_item_type type)
1306 {
1307         unsigned int i;
1308
1309         for (i = 0; i < nb_items; i++)
1310                 if (items[i].type == type)
1311                         return &items[i];
1312
1313         return NULL;
1314 }
1315
1316 int
1317 sfc_flow_parse_pattern(struct sfc_adapter *sa,
1318                        const struct sfc_flow_item *flow_items,
1319                        unsigned int nb_flow_items,
1320                        const struct rte_flow_item pattern[],
1321                        struct sfc_flow_parse_ctx *parse_ctx,
1322                        struct rte_flow_error *error)
1323 {
1324         int rc;
1325         unsigned int prev_layer = SFC_FLOW_ITEM_ANY_LAYER;
1326         boolean_t is_ifrm = B_FALSE;
1327         const struct sfc_flow_item *item;
1328
1329         if (pattern == NULL) {
1330                 rte_flow_error_set(error, EINVAL,
1331                                    RTE_FLOW_ERROR_TYPE_ITEM_NUM, NULL,
1332                                    "NULL pattern");
1333                 return -rte_errno;
1334         }
1335
1336         for (; pattern->type != RTE_FLOW_ITEM_TYPE_END; pattern++) {
1337                 item = sfc_flow_get_item(flow_items, nb_flow_items,
1338                                          pattern->type);
1339                 if (item == NULL) {
1340                         rte_flow_error_set(error, ENOTSUP,
1341                                            RTE_FLOW_ERROR_TYPE_ITEM, pattern,
1342                                            "Unsupported pattern item");
1343                         return -rte_errno;
1344                 }
1345
1346                 /*
1347                  * Omitting one or several protocol layers at the beginning
1348                  * of pattern is supported
1349                  */
1350                 if (item->prev_layer != SFC_FLOW_ITEM_ANY_LAYER &&
1351                     prev_layer != SFC_FLOW_ITEM_ANY_LAYER &&
1352                     item->prev_layer != prev_layer) {
1353                         rte_flow_error_set(error, ENOTSUP,
1354                                            RTE_FLOW_ERROR_TYPE_ITEM, pattern,
1355                                            "Unexpected sequence of pattern items");
1356                         return -rte_errno;
1357                 }
1358
1359                 /*
1360                  * Allow only VOID and ETH pattern items in the inner frame.
1361                  * Also check that there is only one tunneling protocol.
1362                  */
1363                 switch (item->type) {
1364                 case RTE_FLOW_ITEM_TYPE_VOID:
1365                 case RTE_FLOW_ITEM_TYPE_ETH:
1366                         break;
1367
1368                 case RTE_FLOW_ITEM_TYPE_VXLAN:
1369                 case RTE_FLOW_ITEM_TYPE_GENEVE:
1370                 case RTE_FLOW_ITEM_TYPE_NVGRE:
1371                         if (is_ifrm) {
1372                                 rte_flow_error_set(error, EINVAL,
1373                                         RTE_FLOW_ERROR_TYPE_ITEM,
1374                                         pattern,
1375                                         "More than one tunneling protocol");
1376                                 return -rte_errno;
1377                         }
1378                         is_ifrm = B_TRUE;
1379                         break;
1380
1381                 default:
1382                         if (parse_ctx->type == SFC_FLOW_PARSE_CTX_FILTER &&
1383                             is_ifrm) {
1384                                 rte_flow_error_set(error, EINVAL,
1385                                         RTE_FLOW_ERROR_TYPE_ITEM,
1386                                         pattern,
1387                                         "There is an unsupported pattern item "
1388                                         "in the inner frame");
1389                                 return -rte_errno;
1390                         }
1391                         break;
1392                 }
1393
1394                 if (parse_ctx->type != item->ctx_type) {
1395                         rte_flow_error_set(error, EINVAL,
1396                                         RTE_FLOW_ERROR_TYPE_ITEM, pattern,
1397                                         "Parse context type mismatch");
1398                         return -rte_errno;
1399                 }
1400
1401                 rc = item->parse(pattern, parse_ctx, error);
1402                 if (rc != 0) {
1403                         sfc_err(sa, "failed to parse item %s: %s",
1404                                 item->name, strerror(-rc));
1405                         return rc;
1406                 }
1407
1408                 if (item->layer != SFC_FLOW_ITEM_ANY_LAYER)
1409                         prev_layer = item->layer;
1410         }
1411
1412         return 0;
1413 }
1414
1415 static int
1416 sfc_flow_parse_queue(struct sfc_adapter *sa,
1417                      const struct rte_flow_action_queue *queue,
1418                      struct rte_flow *flow)
1419 {
1420         struct sfc_flow_spec *spec = &flow->spec;
1421         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
1422         struct sfc_rxq *rxq;
1423         struct sfc_rxq_info *rxq_info;
1424
1425         if (queue->index >= sfc_sa2shared(sa)->ethdev_rxq_count)
1426                 return -EINVAL;
1427
1428         rxq = sfc_rxq_ctrl_by_ethdev_qid(sa, queue->index);
1429         spec_filter->template.efs_dmaq_id = (uint16_t)rxq->hw_index;
1430
1431         rxq_info = &sfc_sa2shared(sa)->rxq_info[queue->index];
1432         spec_filter->rss_hash_required = !!(rxq_info->rxq_flags &
1433                                             SFC_RXQ_FLAG_RSS_HASH);
1434
1435         return 0;
1436 }
1437
1438 static int
1439 sfc_flow_parse_rss(struct sfc_adapter *sa,
1440                    const struct rte_flow_action_rss *action_rss,
1441                    struct rte_flow *flow)
1442 {
1443         struct sfc_adapter_shared * const sas = sfc_sa2shared(sa);
1444         struct sfc_rss *rss = &sas->rss;
1445         sfc_ethdev_qid_t ethdev_qid;
1446         struct sfc_rxq *rxq;
1447         unsigned int rxq_hw_index_min;
1448         unsigned int rxq_hw_index_max;
1449         efx_rx_hash_type_t efx_hash_types;
1450         const uint8_t *rss_key;
1451         struct sfc_flow_spec *spec = &flow->spec;
1452         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
1453         struct sfc_flow_rss *sfc_rss_conf = &spec_filter->rss_conf;
1454         unsigned int i;
1455
1456         if (action_rss->queue_num == 0)
1457                 return -EINVAL;
1458
1459         ethdev_qid = sfc_sa2shared(sa)->ethdev_rxq_count - 1;
1460         rxq = sfc_rxq_ctrl_by_ethdev_qid(sa, ethdev_qid);
1461         rxq_hw_index_min = rxq->hw_index;
1462         rxq_hw_index_max = 0;
1463
1464         for (i = 0; i < action_rss->queue_num; ++i) {
1465                 ethdev_qid = action_rss->queue[i];
1466
1467                 if ((unsigned int)ethdev_qid >=
1468                     sfc_sa2shared(sa)->ethdev_rxq_count)
1469                         return -EINVAL;
1470
1471                 rxq = sfc_rxq_ctrl_by_ethdev_qid(sa, ethdev_qid);
1472
1473                 if (rxq->hw_index < rxq_hw_index_min)
1474                         rxq_hw_index_min = rxq->hw_index;
1475
1476                 if (rxq->hw_index > rxq_hw_index_max)
1477                         rxq_hw_index_max = rxq->hw_index;
1478         }
1479
1480         if (rxq_hw_index_max - rxq_hw_index_min + 1 > EFX_MAXRSS)
1481                 return -EINVAL;
1482
1483         switch (action_rss->func) {
1484         case RTE_ETH_HASH_FUNCTION_DEFAULT:
1485         case RTE_ETH_HASH_FUNCTION_TOEPLITZ:
1486                 break;
1487         default:
1488                 return -EINVAL;
1489         }
1490
1491         if (action_rss->level)
1492                 return -EINVAL;
1493
1494         /*
1495          * Dummy RSS action with only one queue and no specific settings
1496          * for hash types and key does not require dedicated RSS context
1497          * and may be simplified to single queue action.
1498          */
1499         if (action_rss->queue_num == 1 && action_rss->types == 0 &&
1500             action_rss->key_len == 0) {
1501                 spec_filter->template.efs_dmaq_id = rxq_hw_index_min;
1502                 return 0;
1503         }
1504
1505         if (action_rss->types) {
1506                 int rc;
1507
1508                 rc = sfc_rx_hf_rte_to_efx(sa, action_rss->types,
1509                                           &efx_hash_types);
1510                 if (rc != 0)
1511                         return -rc;
1512         } else {
1513                 unsigned int i;
1514
1515                 efx_hash_types = 0;
1516                 for (i = 0; i < rss->hf_map_nb_entries; ++i)
1517                         efx_hash_types |= rss->hf_map[i].efx;
1518         }
1519
1520         if (action_rss->key_len) {
1521                 if (action_rss->key_len != sizeof(rss->key))
1522                         return -EINVAL;
1523
1524                 rss_key = action_rss->key;
1525         } else {
1526                 rss_key = rss->key;
1527         }
1528
1529         spec_filter->rss = B_TRUE;
1530
1531         sfc_rss_conf->rxq_hw_index_min = rxq_hw_index_min;
1532         sfc_rss_conf->rxq_hw_index_max = rxq_hw_index_max;
1533         sfc_rss_conf->rss_hash_types = efx_hash_types;
1534         rte_memcpy(sfc_rss_conf->rss_key, rss_key, sizeof(rss->key));
1535
1536         for (i = 0; i < RTE_DIM(sfc_rss_conf->rss_tbl); ++i) {
1537                 unsigned int nb_queues = action_rss->queue_num;
1538                 struct sfc_rxq *rxq;
1539
1540                 ethdev_qid = action_rss->queue[i % nb_queues];
1541                 rxq = sfc_rxq_ctrl_by_ethdev_qid(sa, ethdev_qid);
1542                 sfc_rss_conf->rss_tbl[i] = rxq->hw_index - rxq_hw_index_min;
1543         }
1544
1545         return 0;
1546 }
1547
1548 static int
1549 sfc_flow_spec_flush(struct sfc_adapter *sa, struct sfc_flow_spec *spec,
1550                     unsigned int filters_count)
1551 {
1552         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
1553         unsigned int i;
1554         int ret = 0;
1555
1556         for (i = 0; i < filters_count; i++) {
1557                 int rc;
1558
1559                 rc = efx_filter_remove(sa->nic, &spec_filter->filters[i]);
1560                 if (ret == 0 && rc != 0) {
1561                         sfc_err(sa, "failed to remove filter specification "
1562                                 "(rc = %d)", rc);
1563                         ret = rc;
1564                 }
1565         }
1566
1567         return ret;
1568 }
1569
1570 static int
1571 sfc_flow_spec_insert(struct sfc_adapter *sa, struct sfc_flow_spec *spec)
1572 {
1573         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
1574         unsigned int i;
1575         int rc = 0;
1576
1577         for (i = 0; i < spec_filter->count; i++) {
1578                 rc = efx_filter_insert(sa->nic, &spec_filter->filters[i]);
1579                 if (rc != 0) {
1580                         sfc_flow_spec_flush(sa, spec, i);
1581                         break;
1582                 }
1583         }
1584
1585         return rc;
1586 }
1587
1588 static int
1589 sfc_flow_spec_remove(struct sfc_adapter *sa, struct sfc_flow_spec *spec)
1590 {
1591         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
1592
1593         return sfc_flow_spec_flush(sa, spec, spec_filter->count);
1594 }
1595
1596 static int
1597 sfc_flow_filter_insert(struct sfc_adapter *sa,
1598                        struct rte_flow *flow)
1599 {
1600         struct sfc_adapter_shared * const sas = sfc_sa2shared(sa);
1601         struct sfc_rss *rss = &sas->rss;
1602         struct sfc_flow_spec_filter *spec_filter = &flow->spec.filter;
1603         struct sfc_flow_rss *flow_rss = &spec_filter->rss_conf;
1604         uint32_t efs_rss_context = EFX_RSS_CONTEXT_DEFAULT;
1605         boolean_t create_context;
1606         unsigned int i;
1607         int rc = 0;
1608
1609         create_context = spec_filter->rss || (spec_filter->rss_hash_required &&
1610                         rss->dummy_rss_context == EFX_RSS_CONTEXT_DEFAULT);
1611
1612         if (create_context) {
1613                 unsigned int rss_spread;
1614                 unsigned int rss_hash_types;
1615                 uint8_t *rss_key;
1616
1617                 if (spec_filter->rss) {
1618                         rss_spread = flow_rss->rxq_hw_index_max -
1619                                      flow_rss->rxq_hw_index_min + 1;
1620                         rss_hash_types = flow_rss->rss_hash_types;
1621                         rss_key = flow_rss->rss_key;
1622                 } else {
1623                         /*
1624                          * Initialize dummy RSS context parameters to have
1625                          * valid RSS hash. Use default RSS hash function and
1626                          * key.
1627                          */
1628                         rss_spread = 1;
1629                         rss_hash_types = rss->hash_types;
1630                         rss_key = rss->key;
1631                 }
1632
1633                 rc = efx_rx_scale_context_alloc(sa->nic,
1634                                                 EFX_RX_SCALE_EXCLUSIVE,
1635                                                 rss_spread,
1636                                                 &efs_rss_context);
1637                 if (rc != 0)
1638                         goto fail_scale_context_alloc;
1639
1640                 rc = efx_rx_scale_mode_set(sa->nic, efs_rss_context,
1641                                            rss->hash_alg,
1642                                            rss_hash_types, B_TRUE);
1643                 if (rc != 0)
1644                         goto fail_scale_mode_set;
1645
1646                 rc = efx_rx_scale_key_set(sa->nic, efs_rss_context,
1647                                           rss_key, sizeof(rss->key));
1648                 if (rc != 0)
1649                         goto fail_scale_key_set;
1650         } else {
1651                 efs_rss_context = rss->dummy_rss_context;
1652         }
1653
1654         if (spec_filter->rss || spec_filter->rss_hash_required) {
1655                 /*
1656                  * At this point, fully elaborated filter specifications
1657                  * have been produced from the template. To make sure that
1658                  * RSS behaviour is consistent between them, set the same
1659                  * RSS context value everywhere.
1660                  */
1661                 for (i = 0; i < spec_filter->count; i++) {
1662                         efx_filter_spec_t *spec = &spec_filter->filters[i];
1663
1664                         spec->efs_rss_context = efs_rss_context;
1665                         spec->efs_flags |= EFX_FILTER_FLAG_RX_RSS;
1666                         if (spec_filter->rss)
1667                                 spec->efs_dmaq_id = flow_rss->rxq_hw_index_min;
1668                 }
1669         }
1670
1671         rc = sfc_flow_spec_insert(sa, &flow->spec);
1672         if (rc != 0)
1673                 goto fail_filter_insert;
1674
1675         if (create_context) {
1676                 unsigned int dummy_tbl[RTE_DIM(flow_rss->rss_tbl)] = {0};
1677                 unsigned int *tbl;
1678
1679                 tbl = spec_filter->rss ? flow_rss->rss_tbl : dummy_tbl;
1680
1681                 /*
1682                  * Scale table is set after filter insertion because
1683                  * the table entries are relative to the base RxQ ID
1684                  * and the latter is submitted to the HW by means of
1685                  * inserting a filter, so by the time of the request
1686                  * the HW knows all the information needed to verify
1687                  * the table entries, and the operation will succeed
1688                  */
1689                 rc = efx_rx_scale_tbl_set(sa->nic, efs_rss_context,
1690                                           tbl, RTE_DIM(flow_rss->rss_tbl));
1691                 if (rc != 0)
1692                         goto fail_scale_tbl_set;
1693
1694                 /* Remember created dummy RSS context */
1695                 if (!spec_filter->rss)
1696                         rss->dummy_rss_context = efs_rss_context;
1697         }
1698
1699         return 0;
1700
1701 fail_scale_tbl_set:
1702         sfc_flow_spec_remove(sa, &flow->spec);
1703
1704 fail_filter_insert:
1705 fail_scale_key_set:
1706 fail_scale_mode_set:
1707         if (create_context)
1708                 efx_rx_scale_context_free(sa->nic, efs_rss_context);
1709
1710 fail_scale_context_alloc:
1711         return rc;
1712 }
1713
1714 static int
1715 sfc_flow_filter_remove(struct sfc_adapter *sa,
1716                        struct rte_flow *flow)
1717 {
1718         struct sfc_flow_spec_filter *spec_filter = &flow->spec.filter;
1719         int rc = 0;
1720
1721         rc = sfc_flow_spec_remove(sa, &flow->spec);
1722         if (rc != 0)
1723                 return rc;
1724
1725         if (spec_filter->rss) {
1726                 /*
1727                  * All specifications for a given flow rule have the same RSS
1728                  * context, so that RSS context value is taken from the first
1729                  * filter specification
1730                  */
1731                 efx_filter_spec_t *spec = &spec_filter->filters[0];
1732
1733                 rc = efx_rx_scale_context_free(sa->nic, spec->efs_rss_context);
1734         }
1735
1736         return rc;
1737 }
1738
1739 static int
1740 sfc_flow_parse_mark(struct sfc_adapter *sa,
1741                     const struct rte_flow_action_mark *mark,
1742                     struct rte_flow *flow)
1743 {
1744         struct sfc_flow_spec *spec = &flow->spec;
1745         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
1746         const efx_nic_cfg_t *encp = efx_nic_cfg_get(sa->nic);
1747         uint32_t mark_max;
1748
1749         mark_max = encp->enc_filter_action_mark_max;
1750         if (sfc_flow_tunnel_is_active(sa))
1751                 mark_max = RTE_MIN(mark_max, SFC_FT_USER_MARK_MASK);
1752
1753         if (mark == NULL || mark->id > mark_max)
1754                 return EINVAL;
1755
1756         spec_filter->template.efs_flags |= EFX_FILTER_FLAG_ACTION_MARK;
1757         spec_filter->template.efs_mark = mark->id;
1758
1759         return 0;
1760 }
1761
1762 static int
1763 sfc_flow_parse_actions(struct sfc_adapter *sa,
1764                        const struct rte_flow_action actions[],
1765                        struct rte_flow *flow,
1766                        struct rte_flow_error *error)
1767 {
1768         int rc;
1769         struct sfc_flow_spec *spec = &flow->spec;
1770         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
1771         const unsigned int dp_rx_features = sa->priv.dp_rx->features;
1772         const uint64_t rx_metadata = sa->negotiated_rx_metadata;
1773         uint32_t actions_set = 0;
1774         const uint32_t fate_actions_mask = (1UL << RTE_FLOW_ACTION_TYPE_QUEUE) |
1775                                            (1UL << RTE_FLOW_ACTION_TYPE_RSS) |
1776                                            (1UL << RTE_FLOW_ACTION_TYPE_DROP);
1777         const uint32_t mark_actions_mask = (1UL << RTE_FLOW_ACTION_TYPE_MARK) |
1778                                            (1UL << RTE_FLOW_ACTION_TYPE_FLAG);
1779
1780         if (actions == NULL) {
1781                 rte_flow_error_set(error, EINVAL,
1782                                    RTE_FLOW_ERROR_TYPE_ACTION_NUM, NULL,
1783                                    "NULL actions");
1784                 return -rte_errno;
1785         }
1786
1787         for (; actions->type != RTE_FLOW_ACTION_TYPE_END; actions++) {
1788                 switch (actions->type) {
1789                 case RTE_FLOW_ACTION_TYPE_VOID:
1790                         SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ACTION_TYPE_VOID,
1791                                                actions_set);
1792                         break;
1793
1794                 case RTE_FLOW_ACTION_TYPE_QUEUE:
1795                         SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ACTION_TYPE_QUEUE,
1796                                                actions_set);
1797                         if ((actions_set & fate_actions_mask) != 0)
1798                                 goto fail_fate_actions;
1799
1800                         rc = sfc_flow_parse_queue(sa, actions->conf, flow);
1801                         if (rc != 0) {
1802                                 rte_flow_error_set(error, EINVAL,
1803                                         RTE_FLOW_ERROR_TYPE_ACTION, actions,
1804                                         "Bad QUEUE action");
1805                                 return -rte_errno;
1806                         }
1807                         break;
1808
1809                 case RTE_FLOW_ACTION_TYPE_RSS:
1810                         SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ACTION_TYPE_RSS,
1811                                                actions_set);
1812                         if ((actions_set & fate_actions_mask) != 0)
1813                                 goto fail_fate_actions;
1814
1815                         rc = sfc_flow_parse_rss(sa, actions->conf, flow);
1816                         if (rc != 0) {
1817                                 rte_flow_error_set(error, -rc,
1818                                         RTE_FLOW_ERROR_TYPE_ACTION, actions,
1819                                         "Bad RSS action");
1820                                 return -rte_errno;
1821                         }
1822                         break;
1823
1824                 case RTE_FLOW_ACTION_TYPE_DROP:
1825                         SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ACTION_TYPE_DROP,
1826                                                actions_set);
1827                         if ((actions_set & fate_actions_mask) != 0)
1828                                 goto fail_fate_actions;
1829
1830                         spec_filter->template.efs_dmaq_id =
1831                                 EFX_FILTER_SPEC_RX_DMAQ_ID_DROP;
1832                         break;
1833
1834                 case RTE_FLOW_ACTION_TYPE_FLAG:
1835                         SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ACTION_TYPE_FLAG,
1836                                                actions_set);
1837                         if ((actions_set & mark_actions_mask) != 0)
1838                                 goto fail_actions_overlap;
1839
1840                         if ((dp_rx_features & SFC_DP_RX_FEAT_FLOW_FLAG) == 0) {
1841                                 rte_flow_error_set(error, ENOTSUP,
1842                                         RTE_FLOW_ERROR_TYPE_ACTION, NULL,
1843                                         "FLAG action is not supported on the current Rx datapath");
1844                                 return -rte_errno;
1845                         } else if ((rx_metadata &
1846                                     RTE_ETH_RX_METADATA_USER_FLAG) == 0) {
1847                                 rte_flow_error_set(error, ENOTSUP,
1848                                         RTE_FLOW_ERROR_TYPE_ACTION, NULL,
1849                                         "flag delivery has not been negotiated");
1850                                 return -rte_errno;
1851                         }
1852
1853                         spec_filter->template.efs_flags |=
1854                                 EFX_FILTER_FLAG_ACTION_FLAG;
1855                         break;
1856
1857                 case RTE_FLOW_ACTION_TYPE_MARK:
1858                         SFC_BUILD_SET_OVERFLOW(RTE_FLOW_ACTION_TYPE_MARK,
1859                                                actions_set);
1860                         if ((actions_set & mark_actions_mask) != 0)
1861                                 goto fail_actions_overlap;
1862
1863                         if ((dp_rx_features & SFC_DP_RX_FEAT_FLOW_MARK) == 0) {
1864                                 rte_flow_error_set(error, ENOTSUP,
1865                                         RTE_FLOW_ERROR_TYPE_ACTION, NULL,
1866                                         "MARK action is not supported on the current Rx datapath");
1867                                 return -rte_errno;
1868                         } else if ((rx_metadata &
1869                                     RTE_ETH_RX_METADATA_USER_MARK) == 0) {
1870                                 rte_flow_error_set(error, ENOTSUP,
1871                                         RTE_FLOW_ERROR_TYPE_ACTION, NULL,
1872                                         "mark delivery has not been negotiated");
1873                                 return -rte_errno;
1874                         }
1875
1876                         rc = sfc_flow_parse_mark(sa, actions->conf, flow);
1877                         if (rc != 0) {
1878                                 rte_flow_error_set(error, rc,
1879                                         RTE_FLOW_ERROR_TYPE_ACTION, actions,
1880                                         "Bad MARK action");
1881                                 return -rte_errno;
1882                         }
1883                         break;
1884
1885                 default:
1886                         rte_flow_error_set(error, ENOTSUP,
1887                                            RTE_FLOW_ERROR_TYPE_ACTION, actions,
1888                                            "Action is not supported");
1889                         return -rte_errno;
1890                 }
1891
1892                 actions_set |= (1UL << actions->type);
1893         }
1894
1895         /* When fate is unknown, drop traffic. */
1896         if ((actions_set & fate_actions_mask) == 0) {
1897                 spec_filter->template.efs_dmaq_id =
1898                         EFX_FILTER_SPEC_RX_DMAQ_ID_DROP;
1899         }
1900
1901         return 0;
1902
1903 fail_fate_actions:
1904         rte_flow_error_set(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ACTION, actions,
1905                            "Cannot combine several fate-deciding actions, "
1906                            "choose between QUEUE, RSS or DROP");
1907         return -rte_errno;
1908
1909 fail_actions_overlap:
1910         rte_flow_error_set(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ACTION, actions,
1911                            "Overlapping actions are not supported");
1912         return -rte_errno;
1913 }
1914
1915 /**
1916  * Set the EFX_FILTER_MATCH_UNKNOWN_UCAST_DST
1917  * and EFX_FILTER_MATCH_UNKNOWN_MCAST_DST match flags in the same
1918  * specifications after copying.
1919  *
1920  * @param spec[in, out]
1921  *   SFC flow specification to update.
1922  * @param filters_count_for_one_val[in]
1923  *   How many specifications should have the same match flag, what is the
1924  *   number of specifications before copying.
1925  * @param error[out]
1926  *   Perform verbose error reporting if not NULL.
1927  */
1928 static int
1929 sfc_flow_set_unknown_dst_flags(struct sfc_flow_spec *spec,
1930                                unsigned int filters_count_for_one_val,
1931                                struct rte_flow_error *error)
1932 {
1933         unsigned int i;
1934         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
1935         static const efx_filter_match_flags_t vals[] = {
1936                 EFX_FILTER_MATCH_UNKNOWN_UCAST_DST,
1937                 EFX_FILTER_MATCH_UNKNOWN_MCAST_DST
1938         };
1939
1940         if (filters_count_for_one_val * RTE_DIM(vals) != spec_filter->count) {
1941                 rte_flow_error_set(error, EINVAL,
1942                         RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
1943                         "Number of specifications is incorrect while copying "
1944                         "by unknown destination flags");
1945                 return -rte_errno;
1946         }
1947
1948         for (i = 0; i < spec_filter->count; i++) {
1949                 /* The check above ensures that divisor can't be zero here */
1950                 spec_filter->filters[i].efs_match_flags |=
1951                         vals[i / filters_count_for_one_val];
1952         }
1953
1954         return 0;
1955 }
1956
1957 /**
1958  * Check that the following conditions are met:
1959  * - the list of supported filters has a filter
1960  *   with EFX_FILTER_MATCH_UNKNOWN_MCAST_DST flag instead of
1961  *   EFX_FILTER_MATCH_UNKNOWN_UCAST_DST, since this filter will also
1962  *   be inserted.
1963  *
1964  * @param match[in]
1965  *   The match flags of filter.
1966  * @param spec[in]
1967  *   Specification to be supplemented.
1968  * @param filter[in]
1969  *   SFC filter with list of supported filters.
1970  */
1971 static boolean_t
1972 sfc_flow_check_unknown_dst_flags(efx_filter_match_flags_t match,
1973                                  __rte_unused efx_filter_spec_t *spec,
1974                                  struct sfc_filter *filter)
1975 {
1976         unsigned int i;
1977         efx_filter_match_flags_t match_mcast_dst;
1978
1979         match_mcast_dst =
1980                 (match & ~EFX_FILTER_MATCH_UNKNOWN_UCAST_DST) |
1981                 EFX_FILTER_MATCH_UNKNOWN_MCAST_DST;
1982         for (i = 0; i < filter->supported_match_num; i++) {
1983                 if (match_mcast_dst == filter->supported_match[i])
1984                         return B_TRUE;
1985         }
1986
1987         return B_FALSE;
1988 }
1989
1990 /**
1991  * Set the EFX_FILTER_MATCH_ETHER_TYPE match flag and EFX_ETHER_TYPE_IPV4 and
1992  * EFX_ETHER_TYPE_IPV6 values of the corresponding field in the same
1993  * specifications after copying.
1994  *
1995  * @param spec[in, out]
1996  *   SFC flow specification to update.
1997  * @param filters_count_for_one_val[in]
1998  *   How many specifications should have the same EtherType value, what is the
1999  *   number of specifications before copying.
2000  * @param error[out]
2001  *   Perform verbose error reporting if not NULL.
2002  */
2003 static int
2004 sfc_flow_set_ethertypes(struct sfc_flow_spec *spec,
2005                         unsigned int filters_count_for_one_val,
2006                         struct rte_flow_error *error)
2007 {
2008         unsigned int i;
2009         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
2010         static const uint16_t vals[] = {
2011                 EFX_ETHER_TYPE_IPV4, EFX_ETHER_TYPE_IPV6
2012         };
2013
2014         if (filters_count_for_one_val * RTE_DIM(vals) != spec_filter->count) {
2015                 rte_flow_error_set(error, EINVAL,
2016                         RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
2017                         "Number of specifications is incorrect "
2018                         "while copying by Ethertype");
2019                 return -rte_errno;
2020         }
2021
2022         for (i = 0; i < spec_filter->count; i++) {
2023                 spec_filter->filters[i].efs_match_flags |=
2024                         EFX_FILTER_MATCH_ETHER_TYPE;
2025
2026                 /*
2027                  * The check above ensures that
2028                  * filters_count_for_one_val is not 0
2029                  */
2030                 spec_filter->filters[i].efs_ether_type =
2031                         vals[i / filters_count_for_one_val];
2032         }
2033
2034         return 0;
2035 }
2036
2037 /**
2038  * Set the EFX_FILTER_MATCH_OUTER_VID match flag with value 0
2039  * in the same specifications after copying.
2040  *
2041  * @param spec[in, out]
2042  *   SFC flow specification to update.
2043  * @param filters_count_for_one_val[in]
2044  *   How many specifications should have the same match flag, what is the
2045  *   number of specifications before copying.
2046  * @param error[out]
2047  *   Perform verbose error reporting if not NULL.
2048  */
2049 static int
2050 sfc_flow_set_outer_vid_flag(struct sfc_flow_spec *spec,
2051                             unsigned int filters_count_for_one_val,
2052                             struct rte_flow_error *error)
2053 {
2054         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
2055         unsigned int i;
2056
2057         if (filters_count_for_one_val != spec_filter->count) {
2058                 rte_flow_error_set(error, EINVAL,
2059                         RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
2060                         "Number of specifications is incorrect "
2061                         "while copying by outer VLAN ID");
2062                 return -rte_errno;
2063         }
2064
2065         for (i = 0; i < spec_filter->count; i++) {
2066                 spec_filter->filters[i].efs_match_flags |=
2067                         EFX_FILTER_MATCH_OUTER_VID;
2068
2069                 spec_filter->filters[i].efs_outer_vid = 0;
2070         }
2071
2072         return 0;
2073 }
2074
2075 /**
2076  * Set the EFX_FILTER_MATCH_IFRM_UNKNOWN_UCAST_DST and
2077  * EFX_FILTER_MATCH_IFRM_UNKNOWN_MCAST_DST match flags in the same
2078  * specifications after copying.
2079  *
2080  * @param spec[in, out]
2081  *   SFC flow specification to update.
2082  * @param filters_count_for_one_val[in]
2083  *   How many specifications should have the same match flag, what is the
2084  *   number of specifications before copying.
2085  * @param error[out]
2086  *   Perform verbose error reporting if not NULL.
2087  */
2088 static int
2089 sfc_flow_set_ifrm_unknown_dst_flags(struct sfc_flow_spec *spec,
2090                                     unsigned int filters_count_for_one_val,
2091                                     struct rte_flow_error *error)
2092 {
2093         unsigned int i;
2094         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
2095         static const efx_filter_match_flags_t vals[] = {
2096                 EFX_FILTER_MATCH_IFRM_UNKNOWN_UCAST_DST,
2097                 EFX_FILTER_MATCH_IFRM_UNKNOWN_MCAST_DST
2098         };
2099
2100         if (filters_count_for_one_val * RTE_DIM(vals) != spec_filter->count) {
2101                 rte_flow_error_set(error, EINVAL,
2102                         RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
2103                         "Number of specifications is incorrect while copying "
2104                         "by inner frame unknown destination flags");
2105                 return -rte_errno;
2106         }
2107
2108         for (i = 0; i < spec_filter->count; i++) {
2109                 /* The check above ensures that divisor can't be zero here */
2110                 spec_filter->filters[i].efs_match_flags |=
2111                         vals[i / filters_count_for_one_val];
2112         }
2113
2114         return 0;
2115 }
2116
2117 /**
2118  * Check that the following conditions are met:
2119  * - the specification corresponds to a filter for encapsulated traffic
2120  * - the list of supported filters has a filter
2121  *   with EFX_FILTER_MATCH_IFRM_UNKNOWN_MCAST_DST flag instead of
2122  *   EFX_FILTER_MATCH_IFRM_UNKNOWN_UCAST_DST, since this filter will also
2123  *   be inserted.
2124  *
2125  * @param match[in]
2126  *   The match flags of filter.
2127  * @param spec[in]
2128  *   Specification to be supplemented.
2129  * @param filter[in]
2130  *   SFC filter with list of supported filters.
2131  */
2132 static boolean_t
2133 sfc_flow_check_ifrm_unknown_dst_flags(efx_filter_match_flags_t match,
2134                                       efx_filter_spec_t *spec,
2135                                       struct sfc_filter *filter)
2136 {
2137         unsigned int i;
2138         efx_tunnel_protocol_t encap_type = spec->efs_encap_type;
2139         efx_filter_match_flags_t match_mcast_dst;
2140
2141         if (encap_type == EFX_TUNNEL_PROTOCOL_NONE)
2142                 return B_FALSE;
2143
2144         match_mcast_dst =
2145                 (match & ~EFX_FILTER_MATCH_IFRM_UNKNOWN_UCAST_DST) |
2146                 EFX_FILTER_MATCH_IFRM_UNKNOWN_MCAST_DST;
2147         for (i = 0; i < filter->supported_match_num; i++) {
2148                 if (match_mcast_dst == filter->supported_match[i])
2149                         return B_TRUE;
2150         }
2151
2152         return B_FALSE;
2153 }
2154
2155 /**
2156  * Check that the list of supported filters has a filter that differs
2157  * from @p match in that it has no flag EFX_FILTER_MATCH_OUTER_VID
2158  * in this case that filter will be used and the flag
2159  * EFX_FILTER_MATCH_OUTER_VID is not needed.
2160  *
2161  * @param match[in]
2162  *   The match flags of filter.
2163  * @param spec[in]
2164  *   Specification to be supplemented.
2165  * @param filter[in]
2166  *   SFC filter with list of supported filters.
2167  */
2168 static boolean_t
2169 sfc_flow_check_outer_vid_flag(efx_filter_match_flags_t match,
2170                               __rte_unused efx_filter_spec_t *spec,
2171                               struct sfc_filter *filter)
2172 {
2173         unsigned int i;
2174         efx_filter_match_flags_t match_without_vid =
2175                 match & ~EFX_FILTER_MATCH_OUTER_VID;
2176
2177         for (i = 0; i < filter->supported_match_num; i++) {
2178                 if (match_without_vid == filter->supported_match[i])
2179                         return B_FALSE;
2180         }
2181
2182         return B_TRUE;
2183 }
2184
2185 /*
2186  * Match flags that can be automatically added to filters.
2187  * Selecting the last minimum when searching for the copy flag ensures that the
2188  * EFX_FILTER_MATCH_UNKNOWN_UCAST_DST flag has a higher priority than
2189  * EFX_FILTER_MATCH_ETHER_TYPE. This is because the filter
2190  * EFX_FILTER_MATCH_UNKNOWN_UCAST_DST is at the end of the list of supported
2191  * filters.
2192  */
2193 static const struct sfc_flow_copy_flag sfc_flow_copy_flags[] = {
2194         {
2195                 .flag = EFX_FILTER_MATCH_UNKNOWN_UCAST_DST,
2196                 .vals_count = 2,
2197                 .set_vals = sfc_flow_set_unknown_dst_flags,
2198                 .spec_check = sfc_flow_check_unknown_dst_flags,
2199         },
2200         {
2201                 .flag = EFX_FILTER_MATCH_ETHER_TYPE,
2202                 .vals_count = 2,
2203                 .set_vals = sfc_flow_set_ethertypes,
2204                 .spec_check = NULL,
2205         },
2206         {
2207                 .flag = EFX_FILTER_MATCH_IFRM_UNKNOWN_UCAST_DST,
2208                 .vals_count = 2,
2209                 .set_vals = sfc_flow_set_ifrm_unknown_dst_flags,
2210                 .spec_check = sfc_flow_check_ifrm_unknown_dst_flags,
2211         },
2212         {
2213                 .flag = EFX_FILTER_MATCH_OUTER_VID,
2214                 .vals_count = 1,
2215                 .set_vals = sfc_flow_set_outer_vid_flag,
2216                 .spec_check = sfc_flow_check_outer_vid_flag,
2217         },
2218 };
2219
2220 /* Get item from array sfc_flow_copy_flags */
2221 static const struct sfc_flow_copy_flag *
2222 sfc_flow_get_copy_flag(efx_filter_match_flags_t flag)
2223 {
2224         unsigned int i;
2225
2226         for (i = 0; i < RTE_DIM(sfc_flow_copy_flags); i++) {
2227                 if (sfc_flow_copy_flags[i].flag == flag)
2228                         return &sfc_flow_copy_flags[i];
2229         }
2230
2231         return NULL;
2232 }
2233
2234 /**
2235  * Make copies of the specifications, set match flag and values
2236  * of the field that corresponds to it.
2237  *
2238  * @param spec[in, out]
2239  *   SFC flow specification to update.
2240  * @param flag[in]
2241  *   The match flag to add.
2242  * @param error[out]
2243  *   Perform verbose error reporting if not NULL.
2244  */
2245 static int
2246 sfc_flow_spec_add_match_flag(struct sfc_flow_spec *spec,
2247                              efx_filter_match_flags_t flag,
2248                              struct rte_flow_error *error)
2249 {
2250         unsigned int i;
2251         unsigned int new_filters_count;
2252         unsigned int filters_count_for_one_val;
2253         const struct sfc_flow_copy_flag *copy_flag;
2254         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
2255         int rc;
2256
2257         copy_flag = sfc_flow_get_copy_flag(flag);
2258         if (copy_flag == NULL) {
2259                 rte_flow_error_set(error, ENOTSUP,
2260                                    RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
2261                                    "Unsupported spec field for copying");
2262                 return -rte_errno;
2263         }
2264
2265         new_filters_count = spec_filter->count * copy_flag->vals_count;
2266         if (new_filters_count > SF_FLOW_SPEC_NB_FILTERS_MAX) {
2267                 rte_flow_error_set(error, EINVAL,
2268                         RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
2269                         "Too much EFX specifications in the flow rule");
2270                 return -rte_errno;
2271         }
2272
2273         /* Copy filters specifications */
2274         for (i = spec_filter->count; i < new_filters_count; i++) {
2275                 spec_filter->filters[i] =
2276                         spec_filter->filters[i - spec_filter->count];
2277         }
2278
2279         filters_count_for_one_val = spec_filter->count;
2280         spec_filter->count = new_filters_count;
2281
2282         rc = copy_flag->set_vals(spec, filters_count_for_one_val, error);
2283         if (rc != 0)
2284                 return rc;
2285
2286         return 0;
2287 }
2288
2289 /**
2290  * Check that the given set of match flags missing in the original filter spec
2291  * could be covered by adding spec copies which specify the corresponding
2292  * flags and packet field values to match.
2293  *
2294  * @param miss_flags[in]
2295  *   Flags that are missing until the supported filter.
2296  * @param spec[in]
2297  *   Specification to be supplemented.
2298  * @param filter[in]
2299  *   SFC filter.
2300  *
2301  * @return
2302  *   Number of specifications after copy or 0, if the flags can not be added.
2303  */
2304 static unsigned int
2305 sfc_flow_check_missing_flags(efx_filter_match_flags_t miss_flags,
2306                              efx_filter_spec_t *spec,
2307                              struct sfc_filter *filter)
2308 {
2309         unsigned int i;
2310         efx_filter_match_flags_t copy_flags = 0;
2311         efx_filter_match_flags_t flag;
2312         efx_filter_match_flags_t match = spec->efs_match_flags | miss_flags;
2313         sfc_flow_spec_check *check;
2314         unsigned int multiplier = 1;
2315
2316         for (i = 0; i < RTE_DIM(sfc_flow_copy_flags); i++) {
2317                 flag = sfc_flow_copy_flags[i].flag;
2318                 check = sfc_flow_copy_flags[i].spec_check;
2319                 if ((flag & miss_flags) == flag) {
2320                         if (check != NULL && (!check(match, spec, filter)))
2321                                 continue;
2322
2323                         copy_flags |= flag;
2324                         multiplier *= sfc_flow_copy_flags[i].vals_count;
2325                 }
2326         }
2327
2328         if (copy_flags == miss_flags)
2329                 return multiplier;
2330
2331         return 0;
2332 }
2333
2334 /**
2335  * Attempt to supplement the specification template to the minimally
2336  * supported set of match flags. To do this, it is necessary to copy
2337  * the specifications, filling them with the values of fields that
2338  * correspond to the missing flags.
2339  * The necessary and sufficient filter is built from the fewest number
2340  * of copies which could be made to cover the minimally required set
2341  * of flags.
2342  *
2343  * @param sa[in]
2344  *   SFC adapter.
2345  * @param spec[in, out]
2346  *   SFC flow specification to update.
2347  * @param error[out]
2348  *   Perform verbose error reporting if not NULL.
2349  */
2350 static int
2351 sfc_flow_spec_filters_complete(struct sfc_adapter *sa,
2352                                struct sfc_flow_spec *spec,
2353                                struct rte_flow_error *error)
2354 {
2355         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
2356         struct sfc_filter *filter = &sa->filter;
2357         efx_filter_match_flags_t miss_flags;
2358         efx_filter_match_flags_t min_miss_flags = 0;
2359         efx_filter_match_flags_t match;
2360         unsigned int min_multiplier = UINT_MAX;
2361         unsigned int multiplier;
2362         unsigned int i;
2363         int rc;
2364
2365         match = spec_filter->template.efs_match_flags;
2366         for (i = 0; i < filter->supported_match_num; i++) {
2367                 if ((match & filter->supported_match[i]) == match) {
2368                         miss_flags = filter->supported_match[i] & (~match);
2369                         multiplier = sfc_flow_check_missing_flags(miss_flags,
2370                                 &spec_filter->template, filter);
2371                         if (multiplier > 0) {
2372                                 if (multiplier <= min_multiplier) {
2373                                         min_multiplier = multiplier;
2374                                         min_miss_flags = miss_flags;
2375                                 }
2376                         }
2377                 }
2378         }
2379
2380         if (min_multiplier == UINT_MAX) {
2381                 rte_flow_error_set(error, ENOTSUP,
2382                                    RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
2383                                    "The flow rule pattern is unsupported");
2384                 return -rte_errno;
2385         }
2386
2387         for (i = 0; i < RTE_DIM(sfc_flow_copy_flags); i++) {
2388                 efx_filter_match_flags_t flag = sfc_flow_copy_flags[i].flag;
2389
2390                 if ((flag & min_miss_flags) == flag) {
2391                         rc = sfc_flow_spec_add_match_flag(spec, flag, error);
2392                         if (rc != 0)
2393                                 return rc;
2394                 }
2395         }
2396
2397         return 0;
2398 }
2399
2400 /**
2401  * Check that set of match flags is referred to by a filter. Filter is
2402  * described by match flags with the ability to add OUTER_VID and INNER_VID
2403  * flags.
2404  *
2405  * @param match_flags[in]
2406  *   Set of match flags.
2407  * @param flags_pattern[in]
2408  *   Pattern of filter match flags.
2409  */
2410 static boolean_t
2411 sfc_flow_is_match_with_vids(efx_filter_match_flags_t match_flags,
2412                             efx_filter_match_flags_t flags_pattern)
2413 {
2414         if ((match_flags & flags_pattern) != flags_pattern)
2415                 return B_FALSE;
2416
2417         switch (match_flags & ~flags_pattern) {
2418         case 0:
2419         case EFX_FILTER_MATCH_OUTER_VID:
2420         case EFX_FILTER_MATCH_OUTER_VID | EFX_FILTER_MATCH_INNER_VID:
2421                 return B_TRUE;
2422         default:
2423                 return B_FALSE;
2424         }
2425 }
2426
2427 /**
2428  * Check whether the spec maps to a hardware filter which is known to be
2429  * ineffective despite being valid.
2430  *
2431  * @param filter[in]
2432  *   SFC filter with list of supported filters.
2433  * @param spec[in]
2434  *   SFC flow specification.
2435  */
2436 static boolean_t
2437 sfc_flow_is_match_flags_exception(struct sfc_filter *filter,
2438                                   struct sfc_flow_spec *spec)
2439 {
2440         unsigned int i;
2441         uint16_t ether_type;
2442         uint8_t ip_proto;
2443         efx_filter_match_flags_t match_flags;
2444         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
2445
2446         for (i = 0; i < spec_filter->count; i++) {
2447                 match_flags = spec_filter->filters[i].efs_match_flags;
2448
2449                 if (sfc_flow_is_match_with_vids(match_flags,
2450                                                 EFX_FILTER_MATCH_ETHER_TYPE) ||
2451                     sfc_flow_is_match_with_vids(match_flags,
2452                                                 EFX_FILTER_MATCH_ETHER_TYPE |
2453                                                 EFX_FILTER_MATCH_LOC_MAC)) {
2454                         ether_type = spec_filter->filters[i].efs_ether_type;
2455                         if (filter->supports_ip_proto_or_addr_filter &&
2456                             (ether_type == EFX_ETHER_TYPE_IPV4 ||
2457                              ether_type == EFX_ETHER_TYPE_IPV6))
2458                                 return B_TRUE;
2459                 } else if (sfc_flow_is_match_with_vids(match_flags,
2460                                 EFX_FILTER_MATCH_ETHER_TYPE |
2461                                 EFX_FILTER_MATCH_IP_PROTO) ||
2462                            sfc_flow_is_match_with_vids(match_flags,
2463                                 EFX_FILTER_MATCH_ETHER_TYPE |
2464                                 EFX_FILTER_MATCH_IP_PROTO |
2465                                 EFX_FILTER_MATCH_LOC_MAC)) {
2466                         ip_proto = spec_filter->filters[i].efs_ip_proto;
2467                         if (filter->supports_rem_or_local_port_filter &&
2468                             (ip_proto == EFX_IPPROTO_TCP ||
2469                              ip_proto == EFX_IPPROTO_UDP))
2470                                 return B_TRUE;
2471                 }
2472         }
2473
2474         return B_FALSE;
2475 }
2476
2477 static int
2478 sfc_flow_validate_match_flags(struct sfc_adapter *sa,
2479                               struct rte_flow *flow,
2480                               struct rte_flow_error *error)
2481 {
2482         struct sfc_flow_spec *spec = &flow->spec;
2483         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
2484         efx_filter_spec_t *spec_tmpl = &spec_filter->template;
2485         efx_filter_match_flags_t match_flags = spec_tmpl->efs_match_flags;
2486         int rc;
2487
2488         /* Initialize the first filter spec with template */
2489         spec_filter->filters[0] = *spec_tmpl;
2490         spec_filter->count = 1;
2491
2492         if (!sfc_filter_is_match_supported(sa, match_flags)) {
2493                 rc = sfc_flow_spec_filters_complete(sa, &flow->spec, error);
2494                 if (rc != 0)
2495                         return rc;
2496         }
2497
2498         if (sfc_flow_is_match_flags_exception(&sa->filter, &flow->spec)) {
2499                 rte_flow_error_set(error, ENOTSUP,
2500                         RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
2501                         "The flow rule pattern is unsupported");
2502                 return -rte_errno;
2503         }
2504
2505         return 0;
2506 }
2507
2508 static int
2509 sfc_flow_parse_rte_to_filter(struct rte_eth_dev *dev,
2510                              const struct rte_flow_item pattern[],
2511                              const struct rte_flow_action actions[],
2512                              struct rte_flow *flow,
2513                              struct rte_flow_error *error)
2514 {
2515         struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
2516         struct sfc_flow_spec *spec = &flow->spec;
2517         struct sfc_flow_spec_filter *spec_filter = &spec->filter;
2518         struct sfc_flow_parse_ctx ctx;
2519         int rc;
2520
2521         ctx.type = SFC_FLOW_PARSE_CTX_FILTER;
2522         ctx.filter = &spec_filter->template;
2523
2524         rc = sfc_flow_parse_pattern(sa, sfc_flow_items, RTE_DIM(sfc_flow_items),
2525                                     pattern, &ctx, error);
2526         if (rc != 0)
2527                 goto fail_bad_value;
2528
2529         rc = sfc_flow_parse_actions(sa, actions, flow, error);
2530         if (rc != 0)
2531                 goto fail_bad_value;
2532
2533         rc = sfc_flow_validate_match_flags(sa, flow, error);
2534         if (rc != 0)
2535                 goto fail_bad_value;
2536
2537         return 0;
2538
2539 fail_bad_value:
2540         return rc;
2541 }
2542
2543 static int
2544 sfc_flow_parse_rte_to_mae(struct rte_eth_dev *dev,
2545                           const struct rte_flow_item pattern[],
2546                           const struct rte_flow_action actions[],
2547                           struct rte_flow *flow,
2548                           struct rte_flow_error *error)
2549 {
2550         struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
2551         struct sfc_flow_spec *spec = &flow->spec;
2552         struct sfc_flow_spec_mae *spec_mae = &spec->mae;
2553         int rc;
2554
2555         /*
2556          * If the flow is meant to be a JUMP rule in tunnel offload,
2557          * preparse its actions and save its properties in spec_mae.
2558          */
2559         rc = sfc_flow_tunnel_detect_jump_rule(sa, actions, spec_mae, error);
2560         if (rc != 0)
2561                 goto fail;
2562
2563         rc = sfc_mae_rule_parse_pattern(sa, pattern, spec_mae, error);
2564         if (rc != 0)
2565                 goto fail;
2566
2567         if (spec_mae->ft_rule_type == SFC_FT_RULE_JUMP) {
2568                 /*
2569                  * By design, this flow should be represented solely by the
2570                  * outer rule. But the HW/FW hasn't got support for setting
2571                  * Rx mark from RECIRC_ID on outer rule lookup yet. Neither
2572                  * does it support outer rule counters. As a workaround, an
2573                  * action rule of lower priority is used to do the job.
2574                  *
2575                  * So don't skip sfc_mae_rule_parse_actions() below.
2576                  */
2577         }
2578
2579         rc = sfc_mae_rule_parse_actions(sa, actions, spec_mae, error);
2580         if (rc != 0)
2581                 goto fail;
2582
2583         if (spec_mae->ft != NULL) {
2584                 if (spec_mae->ft_rule_type == SFC_FT_RULE_JUMP)
2585                         spec_mae->ft->jump_rule_is_set = B_TRUE;
2586
2587                 ++(spec_mae->ft->refcnt);
2588         }
2589
2590         return 0;
2591
2592 fail:
2593         /* Reset these values to avoid confusing sfc_mae_flow_cleanup(). */
2594         spec_mae->ft_rule_type = SFC_FT_RULE_NONE;
2595         spec_mae->ft = NULL;
2596
2597         return rc;
2598 }
2599
2600 static int
2601 sfc_flow_parse(struct rte_eth_dev *dev,
2602                const struct rte_flow_attr *attr,
2603                const struct rte_flow_item pattern[],
2604                const struct rte_flow_action actions[],
2605                struct rte_flow *flow,
2606                struct rte_flow_error *error)
2607 {
2608         struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
2609         const struct sfc_flow_ops_by_spec *ops;
2610         int rc;
2611
2612         rc = sfc_flow_parse_attr(sa, attr, flow, error);
2613         if (rc != 0)
2614                 return rc;
2615
2616         ops = sfc_flow_get_ops_by_spec(flow);
2617         if (ops == NULL || ops->parse == NULL) {
2618                 rte_flow_error_set(error, ENOTSUP,
2619                                    RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
2620                                    "No backend to handle this flow");
2621                 return -rte_errno;
2622         }
2623
2624         return ops->parse(dev, pattern, actions, flow, error);
2625 }
2626
2627 static struct rte_flow *
2628 sfc_flow_zmalloc(struct rte_flow_error *error)
2629 {
2630         struct rte_flow *flow;
2631
2632         flow = rte_zmalloc("sfc_rte_flow", sizeof(*flow), 0);
2633         if (flow == NULL) {
2634                 rte_flow_error_set(error, ENOMEM,
2635                                    RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
2636                                    "Failed to allocate memory");
2637         }
2638
2639         return flow;
2640 }
2641
2642 static void
2643 sfc_flow_free(struct sfc_adapter *sa, struct rte_flow *flow)
2644 {
2645         const struct sfc_flow_ops_by_spec *ops;
2646
2647         ops = sfc_flow_get_ops_by_spec(flow);
2648         if (ops != NULL && ops->cleanup != NULL)
2649                 ops->cleanup(sa, flow);
2650
2651         rte_free(flow);
2652 }
2653
2654 static int
2655 sfc_flow_insert(struct sfc_adapter *sa, struct rte_flow *flow,
2656                 struct rte_flow_error *error)
2657 {
2658         const struct sfc_flow_ops_by_spec *ops;
2659         int rc;
2660
2661         ops = sfc_flow_get_ops_by_spec(flow);
2662         if (ops == NULL || ops->insert == NULL) {
2663                 rte_flow_error_set(error, ENOTSUP,
2664                                    RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
2665                                    "No backend to handle this flow");
2666                 return rte_errno;
2667         }
2668
2669         rc = ops->insert(sa, flow);
2670         if (rc != 0) {
2671                 rte_flow_error_set(error, rc, RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
2672                                    NULL, "Failed to insert the flow rule");
2673         }
2674
2675         return rc;
2676 }
2677
2678 static int
2679 sfc_flow_remove(struct sfc_adapter *sa, struct rte_flow *flow,
2680                 struct rte_flow_error *error)
2681 {
2682         const struct sfc_flow_ops_by_spec *ops;
2683         int rc;
2684
2685         ops = sfc_flow_get_ops_by_spec(flow);
2686         if (ops == NULL || ops->remove == NULL) {
2687                 rte_flow_error_set(error, ENOTSUP,
2688                                    RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
2689                                    "No backend to handle this flow");
2690                 return rte_errno;
2691         }
2692
2693         rc = ops->remove(sa, flow);
2694         if (rc != 0) {
2695                 rte_flow_error_set(error, rc, RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
2696                                    NULL, "Failed to remove the flow rule");
2697         }
2698
2699         return rc;
2700 }
2701
2702 static int
2703 sfc_flow_verify(struct sfc_adapter *sa, struct rte_flow *flow,
2704                 struct rte_flow_error *error)
2705 {
2706         const struct sfc_flow_ops_by_spec *ops;
2707         int rc = 0;
2708
2709         ops = sfc_flow_get_ops_by_spec(flow);
2710         if (ops == NULL) {
2711                 rte_flow_error_set(error, ENOTSUP,
2712                                    RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
2713                                    "No backend to handle this flow");
2714                 return -rte_errno;
2715         }
2716
2717         if (ops->verify != NULL) {
2718                 SFC_ASSERT(sfc_adapter_is_locked(sa));
2719                 rc = ops->verify(sa, flow);
2720         }
2721
2722         if (rc != 0) {
2723                 rte_flow_error_set(error, rc,
2724                         RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
2725                         "Failed to verify flow validity with FW");
2726                 return -rte_errno;
2727         }
2728
2729         return 0;
2730 }
2731
2732 static int
2733 sfc_flow_validate(struct rte_eth_dev *dev,
2734                   const struct rte_flow_attr *attr,
2735                   const struct rte_flow_item pattern[],
2736                   const struct rte_flow_action actions[],
2737                   struct rte_flow_error *error)
2738 {
2739         struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
2740         struct rte_flow *flow;
2741         int rc;
2742
2743         flow = sfc_flow_zmalloc(error);
2744         if (flow == NULL)
2745                 return -rte_errno;
2746
2747         sfc_adapter_lock(sa);
2748
2749         rc = sfc_flow_parse(dev, attr, pattern, actions, flow, error);
2750         if (rc == 0)
2751                 rc = sfc_flow_verify(sa, flow, error);
2752
2753         sfc_flow_free(sa, flow);
2754
2755         sfc_adapter_unlock(sa);
2756
2757         return rc;
2758 }
2759
2760 static struct rte_flow *
2761 sfc_flow_create(struct rte_eth_dev *dev,
2762                 const struct rte_flow_attr *attr,
2763                 const struct rte_flow_item pattern[],
2764                 const struct rte_flow_action actions[],
2765                 struct rte_flow_error *error)
2766 {
2767         struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
2768         struct rte_flow *flow = NULL;
2769         int rc;
2770
2771         flow = sfc_flow_zmalloc(error);
2772         if (flow == NULL)
2773                 goto fail_no_mem;
2774
2775         sfc_adapter_lock(sa);
2776
2777         rc = sfc_flow_parse(dev, attr, pattern, actions, flow, error);
2778         if (rc != 0)
2779                 goto fail_bad_value;
2780
2781         TAILQ_INSERT_TAIL(&sa->flow_list, flow, entries);
2782
2783         if (sa->state == SFC_ETHDEV_STARTED) {
2784                 rc = sfc_flow_insert(sa, flow, error);
2785                 if (rc != 0)
2786                         goto fail_flow_insert;
2787         }
2788
2789         sfc_adapter_unlock(sa);
2790
2791         return flow;
2792
2793 fail_flow_insert:
2794         TAILQ_REMOVE(&sa->flow_list, flow, entries);
2795
2796 fail_bad_value:
2797         sfc_flow_free(sa, flow);
2798         sfc_adapter_unlock(sa);
2799
2800 fail_no_mem:
2801         return NULL;
2802 }
2803
2804 static int
2805 sfc_flow_destroy(struct rte_eth_dev *dev,
2806                  struct rte_flow *flow,
2807                  struct rte_flow_error *error)
2808 {
2809         struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
2810         struct rte_flow *flow_ptr;
2811         int rc = EINVAL;
2812
2813         sfc_adapter_lock(sa);
2814
2815         TAILQ_FOREACH(flow_ptr, &sa->flow_list, entries) {
2816                 if (flow_ptr == flow)
2817                         rc = 0;
2818         }
2819         if (rc != 0) {
2820                 rte_flow_error_set(error, rc,
2821                                    RTE_FLOW_ERROR_TYPE_HANDLE, NULL,
2822                                    "Failed to find flow rule to destroy");
2823                 goto fail_bad_value;
2824         }
2825
2826         if (sa->state == SFC_ETHDEV_STARTED)
2827                 rc = sfc_flow_remove(sa, flow, error);
2828
2829         TAILQ_REMOVE(&sa->flow_list, flow, entries);
2830         sfc_flow_free(sa, flow);
2831
2832 fail_bad_value:
2833         sfc_adapter_unlock(sa);
2834
2835         return -rc;
2836 }
2837
2838 static int
2839 sfc_flow_flush(struct rte_eth_dev *dev,
2840                struct rte_flow_error *error)
2841 {
2842         struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
2843         struct rte_flow *flow;
2844         int ret = 0;
2845
2846         sfc_adapter_lock(sa);
2847
2848         while ((flow = TAILQ_FIRST(&sa->flow_list)) != NULL) {
2849                 if (sa->state == SFC_ETHDEV_STARTED) {
2850                         int rc;
2851
2852                         rc = sfc_flow_remove(sa, flow, error);
2853                         if (rc != 0)
2854                                 ret = rc;
2855                 }
2856
2857                 TAILQ_REMOVE(&sa->flow_list, flow, entries);
2858                 sfc_flow_free(sa, flow);
2859         }
2860
2861         sfc_adapter_unlock(sa);
2862
2863         return -ret;
2864 }
2865
2866 static int
2867 sfc_flow_query(struct rte_eth_dev *dev,
2868                struct rte_flow *flow,
2869                const struct rte_flow_action *action,
2870                void *data,
2871                struct rte_flow_error *error)
2872 {
2873         struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
2874         const struct sfc_flow_ops_by_spec *ops;
2875         int ret;
2876
2877         sfc_adapter_lock(sa);
2878
2879         ops = sfc_flow_get_ops_by_spec(flow);
2880         if (ops == NULL || ops->query == NULL) {
2881                 ret = rte_flow_error_set(error, ENOTSUP,
2882                         RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
2883                         "No backend to handle this flow");
2884                 goto fail_no_backend;
2885         }
2886
2887         if (sa->state != SFC_ETHDEV_STARTED) {
2888                 ret = rte_flow_error_set(error, EINVAL,
2889                         RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
2890                         "Can't query the flow: the adapter is not started");
2891                 goto fail_not_started;
2892         }
2893
2894         ret = ops->query(dev, flow, action, data, error);
2895         if (ret != 0)
2896                 goto fail_query;
2897
2898         sfc_adapter_unlock(sa);
2899
2900         return 0;
2901
2902 fail_query:
2903 fail_not_started:
2904 fail_no_backend:
2905         sfc_adapter_unlock(sa);
2906         return ret;
2907 }
2908
2909 static int
2910 sfc_flow_isolate(struct rte_eth_dev *dev, int enable,
2911                  struct rte_flow_error *error)
2912 {
2913         struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
2914         int ret = 0;
2915
2916         sfc_adapter_lock(sa);
2917         if (sa->state != SFC_ETHDEV_INITIALIZED) {
2918                 rte_flow_error_set(error, EBUSY,
2919                                    RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
2920                                    NULL, "please close the port first");
2921                 ret = -rte_errno;
2922         } else {
2923                 sfc_sa2shared(sa)->isolated = (enable) ? B_TRUE : B_FALSE;
2924         }
2925         sfc_adapter_unlock(sa);
2926
2927         return ret;
2928 }
2929
2930 static int
2931 sfc_flow_pick_transfer_proxy(struct rte_eth_dev *dev,
2932                              uint16_t *transfer_proxy_port,
2933                              struct rte_flow_error *error)
2934 {
2935         struct sfc_adapter *sa = sfc_adapter_by_eth_dev(dev);
2936         int ret;
2937
2938         ret = sfc_mae_get_switch_domain_admin(sa->mae.switch_domain_id,
2939                                               transfer_proxy_port);
2940         if (ret != 0) {
2941                 return rte_flow_error_set(error, ret,
2942                                           RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
2943                                           NULL, NULL);
2944         }
2945
2946         return 0;
2947 }
2948
2949 const struct rte_flow_ops sfc_flow_ops = {
2950         .validate = sfc_flow_validate,
2951         .create = sfc_flow_create,
2952         .destroy = sfc_flow_destroy,
2953         .flush = sfc_flow_flush,
2954         .query = sfc_flow_query,
2955         .isolate = sfc_flow_isolate,
2956         .tunnel_decap_set = sfc_flow_tunnel_decap_set,
2957         .tunnel_match = sfc_flow_tunnel_match,
2958         .tunnel_action_decap_release = sfc_flow_tunnel_action_decap_release,
2959         .tunnel_item_release = sfc_flow_tunnel_item_release,
2960         .get_restore_info = sfc_flow_tunnel_get_restore_info,
2961         .pick_transfer_proxy = sfc_flow_pick_transfer_proxy,
2962 };
2963
2964 void
2965 sfc_flow_init(struct sfc_adapter *sa)
2966 {
2967         SFC_ASSERT(sfc_adapter_is_locked(sa));
2968
2969         TAILQ_INIT(&sa->flow_list);
2970 }
2971
2972 void
2973 sfc_flow_fini(struct sfc_adapter *sa)
2974 {
2975         struct rte_flow *flow;
2976
2977         SFC_ASSERT(sfc_adapter_is_locked(sa));
2978
2979         while ((flow = TAILQ_FIRST(&sa->flow_list)) != NULL) {
2980                 TAILQ_REMOVE(&sa->flow_list, flow, entries);
2981                 sfc_flow_free(sa, flow);
2982         }
2983 }
2984
2985 void
2986 sfc_flow_stop(struct sfc_adapter *sa)
2987 {
2988         struct sfc_adapter_shared * const sas = sfc_sa2shared(sa);
2989         struct sfc_rss *rss = &sas->rss;
2990         struct rte_flow *flow;
2991
2992         SFC_ASSERT(sfc_adapter_is_locked(sa));
2993
2994         TAILQ_FOREACH(flow, &sa->flow_list, entries)
2995                 sfc_flow_remove(sa, flow, NULL);
2996
2997         if (rss->dummy_rss_context != EFX_RSS_CONTEXT_DEFAULT) {
2998                 efx_rx_scale_context_free(sa->nic, rss->dummy_rss_context);
2999                 rss->dummy_rss_context = EFX_RSS_CONTEXT_DEFAULT;
3000         }
3001
3002         /*
3003          * MAE counter service is not stopped on flow rule remove to avoid
3004          * extra work. Make sure that it is stopped here.
3005          */
3006         sfc_mae_counter_stop(sa);
3007 }
3008
3009 int
3010 sfc_flow_start(struct sfc_adapter *sa)
3011 {
3012         struct rte_flow *flow;
3013         int rc = 0;
3014
3015         sfc_log_init(sa, "entry");
3016
3017         SFC_ASSERT(sfc_adapter_is_locked(sa));
3018
3019         sfc_flow_tunnel_reset_hit_counters(sa);
3020
3021         TAILQ_FOREACH(flow, &sa->flow_list, entries) {
3022                 rc = sfc_flow_insert(sa, flow, NULL);
3023                 if (rc != 0)
3024                         goto fail_bad_flow;
3025         }
3026
3027         sfc_log_init(sa, "done");
3028
3029 fail_bad_flow:
3030         return rc;
3031 }