drivers/net/sfc/sfc_flow.c

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