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_tailq.h>
  11 #include <rte_common.h>
  12 #include <rte_ethdev_driver.h>
  13 #include <rte_eth_ctrl.h>
  14 #include <rte_ether.h>
  15 #include <rte_flow.h>
  16 #include <rte_flow_driver.h>
  17
  18 #include "efx.h"
  19
  20 #include "sfc.h"
  21 #include "sfc_rx.h"
  22 #include "sfc_filter.h"
  23 #include "sfc_flow.h"
  24 #include "sfc_log.h"
  25
  26 /*
  27  * At now flow API is implemented in such a manner that each
  28  * flow rule is converted to a hardware filter.
  29  * All elements of flow rule (attributes, pattern items, actions)
  30  * correspond to one or more fields in the efx_filter_spec_s structure
  31  * that is responsible for the hardware filter.
  32  */
  33
  34 enum sfc_flow_item_layers {
  35         SFC_FLOW_ITEM_ANY_LAYER,
  36         SFC_FLOW_ITEM_START_LAYER,
  37         SFC_FLOW_ITEM_L2,
  38         SFC_FLOW_ITEM_L3,
  39         SFC_FLOW_ITEM_L4,
  40 };
  41
  42 typedef int (sfc_flow_item_parse)(const struct rte_flow_item *item,
  43                                   efx_filter_spec_t *spec,
  44                                   struct rte_flow_error *error);
  45
  46 struct sfc_flow_item {
  47         enum rte_flow_item_type type;           /* Type of item */
  48         enum sfc_flow_item_layers layer;        /* Layer of item */
  49         enum sfc_flow_item_layers prev_layer;   /* Previous layer of item */
  50         sfc_flow_item_parse *parse;             /* Parsing function */
  51 };
  52
  53 static sfc_flow_item_parse sfc_flow_parse_void;
  54 static sfc_flow_item_parse sfc_flow_parse_eth;
  55 static sfc_flow_item_parse sfc_flow_parse_vlan;
  56 static sfc_flow_item_parse sfc_flow_parse_ipv4;
  57 static sfc_flow_item_parse sfc_flow_parse_ipv6;
  58 static sfc_flow_item_parse sfc_flow_parse_tcp;
  59 static sfc_flow_item_parse sfc_flow_parse_udp;
  60 static sfc_flow_item_parse sfc_flow_parse_vxlan;
  61
  62 static boolean_t
  63 sfc_flow_is_zero(const uint8_t *buf, unsigned int size)
  64 {
  65         uint8_t sum = 0;
  66         unsigned int i;
  67
  68         for (i = 0; i < size; i++)
  69                 sum |= buf[i];
  70
  71         return (sum == 0) ? B_TRUE : B_FALSE;
  72 }
  73
  74 /*
  75  * Validate item and prepare structures spec and mask for parsing
  76  */
  77 static int
  78 sfc_flow_parse_init(const struct rte_flow_item *item,
  79                     const void **spec_ptr,
  80                     const void **mask_ptr,
  81                     const void *supp_mask,
  82                     const void *def_mask,
  83                     unsigned int size,
  84                     struct rte_flow_error *error)
  85 {
  86         const uint8_t *spec;
  87         const uint8_t *mask;
  88         const uint8_t *last;
  89         uint8_t match;
  90         uint8_t supp;
  91         unsigned int i;
  92
  93         if (item == NULL) {
  94                 rte_flow_error_set(error, EINVAL,
  95                                    RTE_FLOW_ERROR_TYPE_ITEM, NULL,
  96                                    "NULL item");
  97                 return -rte_errno;
  98         }
  99
 100         if ((item->last != NULL || item->mask != NULL) && item->spec == NULL) {
 101                 rte_flow_error_set(error, EINVAL,
 102                                    RTE_FLOW_ERROR_TYPE_ITEM, item,
 103                                    "Mask or last is set without spec");
 104                 return -rte_errno;
 105         }
 106
 107         /*
 108          * If "mask" is not set, default mask is used,
 109          * but if default mask is NULL, "mask" should be set
 110          */
 111         if (item->mask == NULL) {
 112                 if (def_mask == NULL) {
 113                         rte_flow_error_set(error, EINVAL,
 114                                 RTE_FLOW_ERROR_TYPE_ITEM, NULL,
 115                                 "Mask should be specified");
 116                         return -rte_errno;
 117                 }
 118
 119                 mask = def_mask;
 120         } else {
 121                 mask = item->mask;
 122         }
 123
 124         spec = item->spec;
 125         last = item->last;
 126
 127         if (spec == NULL)
 128                 goto exit;
 129
 130         /*
 131          * If field values in "last" are either 0 or equal to the corresponding
 132          * values in "spec" then they are ignored
 133          */
 134         if (last != NULL &&
 135             !sfc_flow_is_zero(last, size) &&
 136             memcmp(last, spec, size) != 0) {
 137                 rte_flow_error_set(error, ENOTSUP,
 138                                    RTE_FLOW_ERROR_TYPE_ITEM, item,
 139                                    "Ranging is not supported");
 140                 return -rte_errno;
 141         }
 142
 143         if (supp_mask == NULL) {
 144                 rte_flow_error_set(error, EINVAL,
 145                         RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
 146                         "Supported mask for item should be specified");
 147                 return -rte_errno;
 148         }
 149
 150         /* Check that mask and spec not asks for more match than supp_mask */
 151         for (i = 0; i < size; i++) {
 152                 match = spec[i] | mask[i];
 153                 supp = ((const uint8_t *)supp_mask)[i];
 154
 155                 if ((match | supp) != supp) {
 156                         rte_flow_error_set(error, ENOTSUP,
 157                                            RTE_FLOW_ERROR_TYPE_ITEM, item,
 158                                            "Item's field is not supported");
 159                         return -rte_errno;
 160                 }
 161         }
 162
 163 exit:
 164         *spec_ptr = spec;
 165         *mask_ptr = mask;
 166         return 0;
 167 }
 168
 169 /*
 170  * Protocol parsers.
 171  * Masking is not supported, so masks in items should be either
 172  * full or empty (zeroed) and set only for supported fields which
 173  * are specified in the supp_mask.
 174  */
 175
 176 static int
 177 sfc_flow_parse_void(__rte_unused const struct rte_flow_item *item,
 178                     __rte_unused efx_filter_spec_t *efx_spec,
 179                     __rte_unused struct rte_flow_error *error)
 180 {
 181         return 0;
 182 }
 183
 184 /**
 185  * Convert Ethernet item to EFX filter specification.
 186  *
 187  * @param item[in]
 188  *   Item specification. Only source and destination addresses and
 189  *   Ethernet type fields are supported. In addition to full and
 190  *   empty masks of destination address, individual/group mask is
 191  *   also supported. If the mask is NULL, default mask will be used.
 192  *   Ranging is not supported.
 193  * @param efx_spec[in, out]
 194  *   EFX filter specification to update.
 195  * @param[out] error
 196  *   Perform verbose error reporting if not NULL.
 197  */
 198 static int
 199 sfc_flow_parse_eth(const struct rte_flow_item *item,
 200                    efx_filter_spec_t *efx_spec,
 201                    struct rte_flow_error *error)
 202 {
 203         int rc;
 204         const struct rte_flow_item_eth *spec = NULL;
 205         const struct rte_flow_item_eth *mask = NULL;
 206         const struct rte_flow_item_eth supp_mask = {
 207                 .dst.addr_bytes = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff },
 208                 .src.addr_bytes = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff },
 209                 .type = 0xffff,
 210         };
 211         const uint8_t ig_mask[EFX_MAC_ADDR_LEN] = {
 212                 0x01, 0x00, 0x00, 0x00, 0x00, 0x00
 213         };
 214
 215         rc = sfc_flow_parse_init(item,
 216                                  (const void **)&spec,
 217                                  (const void **)&mask,
 218                                  &supp_mask,
 219                                  &rte_flow_item_eth_mask,
 220                                  sizeof(struct rte_flow_item_eth),
 221                                  error);
 222         if (rc != 0)
 223                 return rc;
 224
 225         /* If "spec" is not set, could be any Ethernet */
 226         if (spec == NULL)
 227                 return 0;
 228
 229         if (is_same_ether_addr(&mask->dst, &supp_mask.dst)) {
 230                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_LOC_MAC;
 231                 rte_memcpy(efx_spec->efs_loc_mac, spec->dst.addr_bytes,
 232                            EFX_MAC_ADDR_LEN);
 233         } else if (memcmp(mask->dst.addr_bytes, ig_mask,
 234                           EFX_MAC_ADDR_LEN) == 0) {
 235                 if (is_unicast_ether_addr(&spec->dst))
 236                         efx_spec->efs_match_flags |=
 237                                 EFX_FILTER_MATCH_UNKNOWN_UCAST_DST;
 238                 else
 239                         efx_spec->efs_match_flags |=
 240                                 EFX_FILTER_MATCH_UNKNOWN_MCAST_DST;
 241         } else if (!is_zero_ether_addr(&mask->dst)) {
 242                 goto fail_bad_mask;
 243         }
 244
 245         if (is_same_ether_addr(&mask->src, &supp_mask.src)) {
 246                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_REM_MAC;
 247                 rte_memcpy(efx_spec->efs_rem_mac, spec->src.addr_bytes,
 248                            EFX_MAC_ADDR_LEN);
 249         } else if (!is_zero_ether_addr(&mask->src)) {
 250                 goto fail_bad_mask;
 251         }
 252
 253         /*
 254          * Ether type is in big-endian byte order in item and
 255          * in little-endian in efx_spec, so byte swap is used
 256          */
 257         if (mask->type == supp_mask.type) {
 258                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_ETHER_TYPE;
 259                 efx_spec->efs_ether_type = rte_bswap16(spec->type);
 260         } else if (mask->type != 0) {
 261                 goto fail_bad_mask;
 262         }
 263
 264         return 0;
 265
 266 fail_bad_mask:
 267         rte_flow_error_set(error, EINVAL,
 268                            RTE_FLOW_ERROR_TYPE_ITEM, item,
 269                            "Bad mask in the ETH pattern item");
 270         return -rte_errno;
 271 }
 272
 273 /**
 274  * Convert VLAN item to EFX filter specification.
 275  *
 276  * @param item[in]
 277  *   Item specification. Only VID field is supported.
 278  *   The mask can not be NULL. Ranging is not supported.
 279  * @param efx_spec[in, out]
 280  *   EFX filter specification to update.
 281  * @param[out] error
 282  *   Perform verbose error reporting if not NULL.
 283  */
 284 static int
 285 sfc_flow_parse_vlan(const struct rte_flow_item *item,
 286                     efx_filter_spec_t *efx_spec,
 287                     struct rte_flow_error *error)
 288 {
 289         int rc;
 290         uint16_t vid;
 291         const struct rte_flow_item_vlan *spec = NULL;
 292         const struct rte_flow_item_vlan *mask = NULL;
 293         const struct rte_flow_item_vlan supp_mask = {
 294                 .tci = rte_cpu_to_be_16(ETH_VLAN_ID_MAX),
 295         };
 296
 297         rc = sfc_flow_parse_init(item,
 298                                  (const void **)&spec,
 299                                  (const void **)&mask,
 300                                  &supp_mask,
 301                                  NULL,
 302                                  sizeof(struct rte_flow_item_vlan),
 303                                  error);
 304         if (rc != 0)
 305                 return rc;
 306
 307         /*
 308          * VID is in big-endian byte order in item and
 309          * in little-endian in efx_spec, so byte swap is used.
 310          * If two VLAN items are included, the first matches
 311          * the outer tag and the next matches the inner tag.
 312          */
 313         if (mask->tci == supp_mask.tci) {
 314                 vid = rte_bswap16(spec->tci);
 315
 316                 if (!(efx_spec->efs_match_flags &
 317                       EFX_FILTER_MATCH_OUTER_VID)) {
 318                         efx_spec->efs_match_flags |= EFX_FILTER_MATCH_OUTER_VID;
 319                         efx_spec->efs_outer_vid = vid;
 320                 } else if (!(efx_spec->efs_match_flags &
 321                              EFX_FILTER_MATCH_INNER_VID)) {
 322                         efx_spec->efs_match_flags |= EFX_FILTER_MATCH_INNER_VID;
 323                         efx_spec->efs_inner_vid = vid;
 324                 } else {
 325                         rte_flow_error_set(error, EINVAL,
 326                                            RTE_FLOW_ERROR_TYPE_ITEM, item,
 327                                            "More than two VLAN items");
 328                         return -rte_errno;
 329                 }
 330         } else {
 331                 rte_flow_error_set(error, EINVAL,
 332                                    RTE_FLOW_ERROR_TYPE_ITEM, item,
 333                                    "VLAN ID in TCI match is required");
 334                 return -rte_errno;
 335         }
 336
 337         return 0;
 338 }
 339
 340 /**
 341  * Convert IPv4 item to EFX filter specification.
 342  *
 343  * @param item[in]
 344  *   Item specification. Only source and destination addresses and
 345  *   protocol fields are supported. If the mask is NULL, default
 346  *   mask will be used. Ranging is not supported.
 347  * @param efx_spec[in, out]
 348  *   EFX filter specification to update.
 349  * @param[out] error
 350  *   Perform verbose error reporting if not NULL.
 351  */
 352 static int
 353 sfc_flow_parse_ipv4(const struct rte_flow_item *item,
 354                     efx_filter_spec_t *efx_spec,
 355                     struct rte_flow_error *error)
 356 {
 357         int rc;
 358         const struct rte_flow_item_ipv4 *spec = NULL;
 359         const struct rte_flow_item_ipv4 *mask = NULL;
 360         const uint16_t ether_type_ipv4 = rte_cpu_to_le_16(EFX_ETHER_TYPE_IPV4);
 361         const struct rte_flow_item_ipv4 supp_mask = {
 362                 .hdr = {
 363                         .src_addr = 0xffffffff,
 364                         .dst_addr = 0xffffffff,
 365                         .next_proto_id = 0xff,
 366                 }
 367         };
 368
 369         rc = sfc_flow_parse_init(item,
 370                                  (const void **)&spec,
 371                                  (const void **)&mask,
 372                                  &supp_mask,
 373                                  &rte_flow_item_ipv4_mask,
 374                                  sizeof(struct rte_flow_item_ipv4),
 375                                  error);
 376         if (rc != 0)
 377                 return rc;
 378
 379         /*
 380          * Filtering by IPv4 source and destination addresses requires
 381          * the appropriate ETHER_TYPE in hardware filters
 382          */
 383         if (!(efx_spec->efs_match_flags & EFX_FILTER_MATCH_ETHER_TYPE)) {
 384                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_ETHER_TYPE;
 385                 efx_spec->efs_ether_type = ether_type_ipv4;
 386         } else if (efx_spec->efs_ether_type != ether_type_ipv4) {
 387                 rte_flow_error_set(error, EINVAL,
 388                         RTE_FLOW_ERROR_TYPE_ITEM, item,
 389                         "Ethertype in pattern with IPV4 item should be appropriate");
 390                 return -rte_errno;
 391         }
 392
 393         if (spec == NULL)
 394                 return 0;
 395
 396         /*
 397          * IPv4 addresses are in big-endian byte order in item and in
 398          * efx_spec
 399          */
 400         if (mask->hdr.src_addr == supp_mask.hdr.src_addr) {
 401                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_REM_HOST;
 402                 efx_spec->efs_rem_host.eo_u32[0] = spec->hdr.src_addr;
 403         } else if (mask->hdr.src_addr != 0) {
 404                 goto fail_bad_mask;
 405         }
 406
 407         if (mask->hdr.dst_addr == supp_mask.hdr.dst_addr) {
 408                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_LOC_HOST;
 409                 efx_spec->efs_loc_host.eo_u32[0] = spec->hdr.dst_addr;
 410         } else if (mask->hdr.dst_addr != 0) {
 411                 goto fail_bad_mask;
 412         }
 413
 414         if (mask->hdr.next_proto_id == supp_mask.hdr.next_proto_id) {
 415                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_IP_PROTO;
 416                 efx_spec->efs_ip_proto = spec->hdr.next_proto_id;
 417         } else if (mask->hdr.next_proto_id != 0) {
 418                 goto fail_bad_mask;
 419         }
 420
 421         return 0;
 422
 423 fail_bad_mask:
 424         rte_flow_error_set(error, EINVAL,
 425                            RTE_FLOW_ERROR_TYPE_ITEM, item,
 426                            "Bad mask in the IPV4 pattern item");
 427         return -rte_errno;
 428 }
 429
 430 /**
 431  * Convert IPv6 item to EFX filter specification.
 432  *
 433  * @param item[in]
 434  *   Item specification. Only source and destination addresses and
 435  *   next header fields are supported. If the mask is NULL, default
 436  *   mask will be used. Ranging is not supported.
 437  * @param efx_spec[in, out]
 438  *   EFX filter specification to update.
 439  * @param[out] error
 440  *   Perform verbose error reporting if not NULL.
 441  */
 442 static int
 443 sfc_flow_parse_ipv6(const struct rte_flow_item *item,
 444                     efx_filter_spec_t *efx_spec,
 445                     struct rte_flow_error *error)
 446 {
 447         int rc;
 448         const struct rte_flow_item_ipv6 *spec = NULL;
 449         const struct rte_flow_item_ipv6 *mask = NULL;
 450         const uint16_t ether_type_ipv6 = rte_cpu_to_le_16(EFX_ETHER_TYPE_IPV6);
 451         const struct rte_flow_item_ipv6 supp_mask = {
 452                 .hdr = {
 453                         .src_addr = { 0xff, 0xff, 0xff, 0xff,
 454                                       0xff, 0xff, 0xff, 0xff,
 455                                       0xff, 0xff, 0xff, 0xff,
 456                                       0xff, 0xff, 0xff, 0xff },
 457                         .dst_addr = { 0xff, 0xff, 0xff, 0xff,
 458                                       0xff, 0xff, 0xff, 0xff,
 459                                       0xff, 0xff, 0xff, 0xff,
 460                                       0xff, 0xff, 0xff, 0xff },
 461                         .proto = 0xff,
 462                 }
 463         };
 464
 465         rc = sfc_flow_parse_init(item,
 466                                  (const void **)&spec,
 467                                  (const void **)&mask,
 468                                  &supp_mask,
 469                                  &rte_flow_item_ipv6_mask,
 470                                  sizeof(struct rte_flow_item_ipv6),
 471                                  error);
 472         if (rc != 0)
 473                 return rc;
 474
 475         /*
 476          * Filtering by IPv6 source and destination addresses requires
 477          * the appropriate ETHER_TYPE in hardware filters
 478          */
 479         if (!(efx_spec->efs_match_flags & EFX_FILTER_MATCH_ETHER_TYPE)) {
 480                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_ETHER_TYPE;
 481                 efx_spec->efs_ether_type = ether_type_ipv6;
 482         } else if (efx_spec->efs_ether_type != ether_type_ipv6) {
 483                 rte_flow_error_set(error, EINVAL,
 484                         RTE_FLOW_ERROR_TYPE_ITEM, item,
 485                         "Ethertype in pattern with IPV6 item should be appropriate");
 486                 return -rte_errno;
 487         }
 488
 489         if (spec == NULL)
 490                 return 0;
 491
 492         /*
 493          * IPv6 addresses are in big-endian byte order in item and in
 494          * efx_spec
 495          */
 496         if (memcmp(mask->hdr.src_addr, supp_mask.hdr.src_addr,
 497                    sizeof(mask->hdr.src_addr)) == 0) {
 498                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_REM_HOST;
 499
 500                 RTE_BUILD_BUG_ON(sizeof(efx_spec->efs_rem_host) !=
 501                                  sizeof(spec->hdr.src_addr));
 502                 rte_memcpy(&efx_spec->efs_rem_host, spec->hdr.src_addr,
 503                            sizeof(efx_spec->efs_rem_host));
 504         } else if (!sfc_flow_is_zero(mask->hdr.src_addr,
 505                                      sizeof(mask->hdr.src_addr))) {
 506                 goto fail_bad_mask;
 507         }
 508
 509         if (memcmp(mask->hdr.dst_addr, supp_mask.hdr.dst_addr,
 510                    sizeof(mask->hdr.dst_addr)) == 0) {
 511                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_LOC_HOST;
 512
 513                 RTE_BUILD_BUG_ON(sizeof(efx_spec->efs_loc_host) !=
 514                                  sizeof(spec->hdr.dst_addr));
 515                 rte_memcpy(&efx_spec->efs_loc_host, spec->hdr.dst_addr,
 516                            sizeof(efx_spec->efs_loc_host));
 517         } else if (!sfc_flow_is_zero(mask->hdr.dst_addr,
 518                                      sizeof(mask->hdr.dst_addr))) {
 519                 goto fail_bad_mask;
 520         }
 521
 522         if (mask->hdr.proto == supp_mask.hdr.proto) {
 523                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_IP_PROTO;
 524                 efx_spec->efs_ip_proto = spec->hdr.proto;
 525         } else if (mask->hdr.proto != 0) {
 526                 goto fail_bad_mask;
 527         }
 528
 529         return 0;
 530
 531 fail_bad_mask:
 532         rte_flow_error_set(error, EINVAL,
 533                            RTE_FLOW_ERROR_TYPE_ITEM, item,
 534                            "Bad mask in the IPV6 pattern item");
 535         return -rte_errno;
 536 }
 537
 538 /**
 539  * Convert TCP item to EFX filter specification.
 540  *
 541  * @param item[in]
 542  *   Item specification. Only source and destination ports fields
 543  *   are supported. If the mask is NULL, default mask will be used.
 544  *   Ranging is not supported.
 545  * @param efx_spec[in, out]
 546  *   EFX filter specification to update.
 547  * @param[out] error
 548  *   Perform verbose error reporting if not NULL.
 549  */
 550 static int
 551 sfc_flow_parse_tcp(const struct rte_flow_item *item,
 552                    efx_filter_spec_t *efx_spec,
 553                    struct rte_flow_error *error)
 554 {
 555         int rc;
 556         const struct rte_flow_item_tcp *spec = NULL;
 557         const struct rte_flow_item_tcp *mask = NULL;
 558         const struct rte_flow_item_tcp supp_mask = {
 559                 .hdr = {
 560                         .src_port = 0xffff,
 561                         .dst_port = 0xffff,
 562                 }
 563         };
 564
 565         rc = sfc_flow_parse_init(item,
 566                                  (const void **)&spec,
 567                                  (const void **)&mask,
 568                                  &supp_mask,
 569                                  &rte_flow_item_tcp_mask,
 570                                  sizeof(struct rte_flow_item_tcp),
 571                                  error);
 572         if (rc != 0)
 573                 return rc;
 574
 575         /*
 576          * Filtering by TCP source and destination ports requires
 577          * the appropriate IP_PROTO in hardware filters
 578          */
 579         if (!(efx_spec->efs_match_flags & EFX_FILTER_MATCH_IP_PROTO)) {
 580                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_IP_PROTO;
 581                 efx_spec->efs_ip_proto = EFX_IPPROTO_TCP;
 582         } else if (efx_spec->efs_ip_proto != EFX_IPPROTO_TCP) {
 583                 rte_flow_error_set(error, EINVAL,
 584                         RTE_FLOW_ERROR_TYPE_ITEM, item,
 585                         "IP proto in pattern with TCP item should be appropriate");
 586                 return -rte_errno;
 587         }
 588
 589         if (spec == NULL)
 590                 return 0;
 591
 592         /*
 593          * Source and destination ports are in big-endian byte order in item and
 594          * in little-endian in efx_spec, so byte swap is used
 595          */
 596         if (mask->hdr.src_port == supp_mask.hdr.src_port) {
 597                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_REM_PORT;
 598                 efx_spec->efs_rem_port = rte_bswap16(spec->hdr.src_port);
 599         } else if (mask->hdr.src_port != 0) {
 600                 goto fail_bad_mask;
 601         }
 602
 603         if (mask->hdr.dst_port == supp_mask.hdr.dst_port) {
 604                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_LOC_PORT;
 605                 efx_spec->efs_loc_port = rte_bswap16(spec->hdr.dst_port);
 606         } else if (mask->hdr.dst_port != 0) {
 607                 goto fail_bad_mask;
 608         }
 609
 610         return 0;
 611
 612 fail_bad_mask:
 613         rte_flow_error_set(error, EINVAL,
 614                            RTE_FLOW_ERROR_TYPE_ITEM, item,
 615                            "Bad mask in the TCP pattern item");
 616         return -rte_errno;
 617 }
 618
 619 /**
 620  * Convert UDP item to EFX filter specification.
 621  *
 622  * @param item[in]
 623  *   Item specification. Only source and destination ports fields
 624  *   are supported. If the mask is NULL, default mask will be used.
 625  *   Ranging is not supported.
 626  * @param efx_spec[in, out]
 627  *   EFX filter specification to update.
 628  * @param[out] error
 629  *   Perform verbose error reporting if not NULL.
 630  */
 631 static int
 632 sfc_flow_parse_udp(const struct rte_flow_item *item,
 633                    efx_filter_spec_t *efx_spec,
 634                    struct rte_flow_error *error)
 635 {
 636         int rc;
 637         const struct rte_flow_item_udp *spec = NULL;
 638         const struct rte_flow_item_udp *mask = NULL;
 639         const struct rte_flow_item_udp supp_mask = {
 640                 .hdr = {
 641                         .src_port = 0xffff,
 642                         .dst_port = 0xffff,
 643                 }
 644         };
 645
 646         rc = sfc_flow_parse_init(item,
 647                                  (const void **)&spec,
 648                                  (const void **)&mask,
 649                                  &supp_mask,
 650                                  &rte_flow_item_udp_mask,
 651                                  sizeof(struct rte_flow_item_udp),
 652                                  error);
 653         if (rc != 0)
 654                 return rc;
 655
 656         /*
 657          * Filtering by UDP source and destination ports requires
 658          * the appropriate IP_PROTO in hardware filters
 659          */
 660         if (!(efx_spec->efs_match_flags & EFX_FILTER_MATCH_IP_PROTO)) {
 661                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_IP_PROTO;
 662                 efx_spec->efs_ip_proto = EFX_IPPROTO_UDP;
 663         } else if (efx_spec->efs_ip_proto != EFX_IPPROTO_UDP) {
 664                 rte_flow_error_set(error, EINVAL,
 665                         RTE_FLOW_ERROR_TYPE_ITEM, item,
 666                         "IP proto in pattern with UDP item should be appropriate");
 667                 return -rte_errno;
 668         }
 669
 670         if (spec == NULL)
 671                 return 0;
 672
 673         /*
 674          * Source and destination ports are in big-endian byte order in item and
 675          * in little-endian in efx_spec, so byte swap is used
 676          */
 677         if (mask->hdr.src_port == supp_mask.hdr.src_port) {
 678                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_REM_PORT;
 679                 efx_spec->efs_rem_port = rte_bswap16(spec->hdr.src_port);
 680         } else if (mask->hdr.src_port != 0) {
 681                 goto fail_bad_mask;
 682         }
 683
 684         if (mask->hdr.dst_port == supp_mask.hdr.dst_port) {
 685                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_LOC_PORT;
 686                 efx_spec->efs_loc_port = rte_bswap16(spec->hdr.dst_port);
 687         } else if (mask->hdr.dst_port != 0) {
 688                 goto fail_bad_mask;
 689         }
 690
 691         return 0;
 692
 693 fail_bad_mask:
 694         rte_flow_error_set(error, EINVAL,
 695                            RTE_FLOW_ERROR_TYPE_ITEM, item,
 696                            "Bad mask in the UDP pattern item");
 697         return -rte_errno;
 698 }
 699
 700 /*
 701  * Filters for encapsulated packets match based on the EtherType and IP
 702  * protocol in the outer frame.
 703  */
 704 static int
 705 sfc_flow_set_match_flags_for_encap_pkts(const struct rte_flow_item *item,
 706                                         efx_filter_spec_t *efx_spec,
 707                                         uint8_t ip_proto,
 708                                         struct rte_flow_error *error)
 709 {
 710         if (!(efx_spec->efs_match_flags & EFX_FILTER_MATCH_IP_PROTO)) {
 711                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_IP_PROTO;
 712                 efx_spec->efs_ip_proto = ip_proto;
 713         } else if (efx_spec->efs_ip_proto != ip_proto) {
 714                 switch (ip_proto) {
 715                 case EFX_IPPROTO_UDP:
 716                         rte_flow_error_set(error, EINVAL,
 717                                 RTE_FLOW_ERROR_TYPE_ITEM, item,
 718                                 "Outer IP header protocol must be UDP "
 719                                 "in VxLAN pattern");
 720                         return -rte_errno;
 721
 722                 default:
 723                         rte_flow_error_set(error, EINVAL,
 724                                 RTE_FLOW_ERROR_TYPE_ITEM, item,
 725                                 "Only VxLAN tunneling patterns "
 726                                 "are supported");
 727                         return -rte_errno;
 728                 }
 729         }
 730
 731         if (!(efx_spec->efs_match_flags & EFX_FILTER_MATCH_ETHER_TYPE)) {
 732                 rte_flow_error_set(error, EINVAL,
 733                         RTE_FLOW_ERROR_TYPE_ITEM, item,
 734                         "Outer frame EtherType in pattern with tunneling "
 735                         "must be set");
 736                 return -rte_errno;
 737         } else if (efx_spec->efs_ether_type != EFX_ETHER_TYPE_IPV4 &&
 738                    efx_spec->efs_ether_type != EFX_ETHER_TYPE_IPV6) {
 739                 rte_flow_error_set(error, EINVAL,
 740                         RTE_FLOW_ERROR_TYPE_ITEM, item,
 741                         "Outer frame EtherType in pattern with tunneling "
 742                         "must be IPv4 or IPv6");
 743                 return -rte_errno;
 744         }
 745
 746         return 0;
 747 }
 748
 749 static int
 750 sfc_flow_set_efx_spec_vni_or_vsid(efx_filter_spec_t *efx_spec,
 751                                   const uint8_t *vni_or_vsid_val,
 752                                   const uint8_t *vni_or_vsid_mask,
 753                                   const struct rte_flow_item *item,
 754                                   struct rte_flow_error *error)
 755 {
 756         const uint8_t vni_or_vsid_full_mask[EFX_VNI_OR_VSID_LEN] = {
 757                 0xff, 0xff, 0xff
 758         };
 759
 760         if (memcmp(vni_or_vsid_mask, vni_or_vsid_full_mask,
 761                    EFX_VNI_OR_VSID_LEN) == 0) {
 762                 efx_spec->efs_match_flags |= EFX_FILTER_MATCH_VNI_OR_VSID;
 763                 rte_memcpy(efx_spec->efs_vni_or_vsid, vni_or_vsid_val,
 764                            EFX_VNI_OR_VSID_LEN);
 765         } else if (!sfc_flow_is_zero(vni_or_vsid_mask, EFX_VNI_OR_VSID_LEN)) {
 766                 rte_flow_error_set(error, EINVAL,
 767                                    RTE_FLOW_ERROR_TYPE_ITEM, item,
 768                                    "Unsupported VNI/VSID mask");
 769                 return -rte_errno;
 770         }
 771
 772         return 0;
 773 }
 774
 775 /**
 776  * Convert VXLAN item to EFX filter specification.
 777  *
 778  * @param item[in]
 779  *   Item specification. Only VXLAN network identifier field is supported.
 780  *   If the mask is NULL, default mask will be used.
 781  *   Ranging is not supported.
 782  * @param efx_spec[in, out]
 783  *   EFX filter specification to update.
 784  * @param[out] error
 785  *   Perform verbose error reporting if not NULL.
 786  */
 787 static int
 788 sfc_flow_parse_vxlan(const struct rte_flow_item *item,
 789                      efx_filter_spec_t *efx_spec,
 790                      struct rte_flow_error *error)
 791 {
 792         int rc;
 793         const struct rte_flow_item_vxlan *spec = NULL;
 794         const struct rte_flow_item_vxlan *mask = NULL;
 795         const struct rte_flow_item_vxlan supp_mask = {
 796                 .vni = { 0xff, 0xff, 0xff }
 797         };
 798
 799         rc = sfc_flow_parse_init(item,
 800                                  (const void **)&spec,
 801                                  (const void **)&mask,
 802                                  &supp_mask,
 803                                  &rte_flow_item_vxlan_mask,
 804                                  sizeof(struct rte_flow_item_vxlan),
 805                                  error);
 806         if (rc != 0)
 807                 return rc;
 808
 809         rc = sfc_flow_set_match_flags_for_encap_pkts(item, efx_spec,
 810                                                      EFX_IPPROTO_UDP, error);
 811         if (rc != 0)
 812                 return rc;
 813
 814         efx_spec->efs_encap_type = EFX_TUNNEL_PROTOCOL_VXLAN;
 815         efx_spec->efs_match_flags |= EFX_FILTER_MATCH_ENCAP_TYPE;
 816
 817         if (spec == NULL)
 818                 return 0;
 819
 820         rc = sfc_flow_set_efx_spec_vni_or_vsid(efx_spec, spec->vni,
 821                                                mask->vni, item, error);
 822
 823         return rc;
 824 }
 825
 826 static const struct sfc_flow_item sfc_flow_items[] = {
 827         {
 828                 .type = RTE_FLOW_ITEM_TYPE_VOID,
 829                 .prev_layer = SFC_FLOW_ITEM_ANY_LAYER,
 830                 .layer = SFC_FLOW_ITEM_ANY_LAYER,
 831                 .parse = sfc_flow_parse_void,
 832         },
 833         {
 834                 .type = RTE_FLOW_ITEM_TYPE_ETH,
 835                 .prev_layer = SFC_FLOW_ITEM_START_LAYER,
 836                 .layer = SFC_FLOW_ITEM_L2,
 837                 .parse = sfc_flow_parse_eth,
 838         },
 839         {
 840                 .type = RTE_FLOW_ITEM_TYPE_VLAN,
 841                 .prev_layer = SFC_FLOW_ITEM_L2,
 842                 .layer = SFC_FLOW_ITEM_L2,
 843                 .parse = sfc_flow_parse_vlan,
 844         },
 845         {
 846                 .type = RTE_FLOW_ITEM_TYPE_IPV4,
 847                 .prev_layer = SFC_FLOW_ITEM_L2,
 848                 .layer = SFC_FLOW_ITEM_L3,
 849                 .parse = sfc_flow_parse_ipv4,
 850         },
 851         {
 852                 .type = RTE_FLOW_ITEM_TYPE_IPV6,
 853                 .prev_layer = SFC_FLOW_ITEM_L2,
 854                 .layer = SFC_FLOW_ITEM_L3,
 855                 .parse = sfc_flow_parse_ipv6,
 856         },
 857         {
 858                 .type = RTE_FLOW_ITEM_TYPE_TCP,
 859                 .prev_layer = SFC_FLOW_ITEM_L3,
 860                 .layer = SFC_FLOW_ITEM_L4,
 861                 .parse = sfc_flow_parse_tcp,
 862         },
 863         {
 864                 .type = RTE_FLOW_ITEM_TYPE_UDP,
 865                 .prev_layer = SFC_FLOW_ITEM_L3,
 866                 .layer = SFC_FLOW_ITEM_L4,
 867                 .parse = sfc_flow_parse_udp,
 868         },
 869         {
 870                 .type = RTE_FLOW_ITEM_TYPE_VXLAN,
 871                 .prev_layer = SFC_FLOW_ITEM_L4,
 872                 .layer = SFC_FLOW_ITEM_START_LAYER,
 873                 .parse = sfc_flow_parse_vxlan,
 874         },
 875 };
 876
 877 /*
 878  * Protocol-independent flow API support
 879  */
 880 static int
 881 sfc_flow_parse_attr(const struct rte_flow_attr *attr,
 882                     struct rte_flow *flow,
 883                     struct rte_flow_error *error)
 884 {
 885         if (attr == NULL) {
 886                 rte_flow_error_set(error, EINVAL,
 887                                    RTE_FLOW_ERROR_TYPE_ATTR, NULL,
 888                                    "NULL attribute");
 889                 return -rte_errno;
 890         }
 891         if (attr->group != 0) {
 892                 rte_flow_error_set(error, ENOTSUP,
 893                                    RTE_FLOW_ERROR_TYPE_ATTR_GROUP, attr,
 894                                    "Groups are not supported");
 895                 return -rte_errno;
 896         }
 897         if (attr->priority != 0) {
 898                 rte_flow_error_set(error, ENOTSUP,
 899                                    RTE_FLOW_ERROR_TYPE_ATTR_PRIORITY, attr,
 900                                    "Priorities are not supported");
 901                 return -rte_errno;
 902         }
 903         if (attr->egress != 0) {
 904                 rte_flow_error_set(error, ENOTSUP,
 905                                    RTE_FLOW_ERROR_TYPE_ATTR_EGRESS, attr,
 906                                    "Egress is not supported");
 907                 return -rte_errno;
 908         }
 909         if (attr->ingress == 0) {
 910                 rte_flow_error_set(error, ENOTSUP,
 911                                    RTE_FLOW_ERROR_TYPE_ATTR_INGRESS, attr,
 912                                    "Only ingress is supported");
 913                 return -rte_errno;
 914         }
 915
 916         flow->spec.efs_flags |= EFX_FILTER_FLAG_RX;
 917         flow->spec.efs_rss_context = EFX_RSS_CONTEXT_DEFAULT;
 918
 919         return 0;
 920 }
 921
 922 /* Get item from array sfc_flow_items */
 923 static const struct sfc_flow_item *
 924 sfc_flow_get_item(enum rte_flow_item_type type)
 925 {
 926         unsigned int i;
 927
 928         for (i = 0; i < RTE_DIM(sfc_flow_items); i++)
 929                 if (sfc_flow_items[i].type == type)
 930                         return &sfc_flow_items[i];
 931
 932         return NULL;
 933 }
 934
 935 static int
 936 sfc_flow_parse_pattern(const struct rte_flow_item pattern[],
 937                        struct rte_flow *flow,
 938                        struct rte_flow_error *error)
 939 {
 940         int rc;
 941         unsigned int prev_layer = SFC_FLOW_ITEM_ANY_LAYER;
 942         boolean_t is_ifrm = B_FALSE;
 943         const struct sfc_flow_item *item;
 944
 945         if (pattern == NULL) {
 946                 rte_flow_error_set(error, EINVAL,
 947                                    RTE_FLOW_ERROR_TYPE_ITEM_NUM, NULL,
 948                                    "NULL pattern");
 949                 return -rte_errno;
 950         }
 951
 952         for (; pattern->type != RTE_FLOW_ITEM_TYPE_END; pattern++) {
 953                 item = sfc_flow_get_item(pattern->type);
 954                 if (item == NULL) {
 955                         rte_flow_error_set(error, ENOTSUP,
 956                                            RTE_FLOW_ERROR_TYPE_ITEM, pattern,
 957                                            "Unsupported pattern item");
 958                         return -rte_errno;
 959                 }
 960
 961                 /*
 962                  * Omitting one or several protocol layers at the beginning
 963                  * of pattern is supported
 964                  */
 965                 if (item->prev_layer != SFC_FLOW_ITEM_ANY_LAYER &&
 966                     prev_layer != SFC_FLOW_ITEM_ANY_LAYER &&
 967                     item->prev_layer != prev_layer) {
 968                         rte_flow_error_set(error, ENOTSUP,
 969                                            RTE_FLOW_ERROR_TYPE_ITEM, pattern,
 970                                            "Unexpected sequence of pattern items");
 971                         return -rte_errno;
 972                 }
 973
 974                 /*
 975                  * Allow only VOID pattern item in the inner frame.
 976                  * Also check that there is only one tunneling protocol.
 977                  */
 978                 switch (item->type) {
 979                 case RTE_FLOW_ITEM_TYPE_VOID:
 980                         break;
 981
 982                 case RTE_FLOW_ITEM_TYPE_VXLAN:
 983                         if (is_ifrm) {
 984                                 rte_flow_error_set(error, EINVAL,
 985                                         RTE_FLOW_ERROR_TYPE_ITEM,
 986                                         pattern,
 987                                         "More than one tunneling protocol");
 988                                 return -rte_errno;
 989                         }
 990                         is_ifrm = B_TRUE;
 991                         break;
 992
 993                 default:
 994                         if (is_ifrm) {
 995                                 rte_flow_error_set(error, EINVAL,
 996                                         RTE_FLOW_ERROR_TYPE_ITEM,
 997                                         pattern,
 998                                         "There is an unsupported pattern item "
 999                                         "in the inner frame");
1000                                 return -rte_errno;
1001                         }
1002                         break;
1003                 }
1004
1005                 rc = item->parse(pattern, &flow->spec, error);
1006                 if (rc != 0)
1007                         return rc;
1008
1009                 if (item->layer != SFC_FLOW_ITEM_ANY_LAYER)
1010                         prev_layer = item->layer;
1011         }
1012
1013         return 0;
1014 }
1015
1016 static int
1017 sfc_flow_parse_queue(struct sfc_adapter *sa,
1018                      const struct rte_flow_action_queue *queue,
1019                      struct rte_flow *flow)
1020 {
1021         struct sfc_rxq *rxq;
1022
1023         if (queue->index >= sa->rxq_count)
1024                 return -EINVAL;
1025
1026         rxq = sa->rxq_info[queue->index].rxq;
1027         flow->spec.efs_dmaq_id = (uint16_t)rxq->hw_index;
1028
1029         return 0;
1030 }
1031
1032 #if EFSYS_OPT_RX_SCALE
1033 static int
1034 sfc_flow_parse_rss(struct sfc_adapter *sa,
1035                    const struct rte_flow_action_rss *rss,
1036                    struct rte_flow *flow)
1037 {
1038         unsigned int rxq_sw_index;
1039         struct sfc_rxq *rxq;
1040         unsigned int rxq_hw_index_min;
1041         unsigned int rxq_hw_index_max;
1042         const struct rte_eth_rss_conf *rss_conf = rss->rss_conf;
1043         uint64_t rss_hf;
1044         uint8_t *rss_key = NULL;
1045         struct sfc_flow_rss *sfc_rss_conf = &flow->rss_conf;
1046         unsigned int i;
1047
1048         if (rss->num == 0)
1049                 return -EINVAL;
1050
1051         rxq_sw_index = sa->rxq_count - 1;
1052         rxq = sa->rxq_info[rxq_sw_index].rxq;
1053         rxq_hw_index_min = rxq->hw_index;
1054         rxq_hw_index_max = 0;
1055
1056         for (i = 0; i < rss->num; ++i) {
1057                 rxq_sw_index = rss->queue[i];
1058
1059                 if (rxq_sw_index >= sa->rxq_count)
1060                         return -EINVAL;
1061
1062                 rxq = sa->rxq_info[rxq_sw_index].rxq;
1063
1064                 if (rxq->hw_index < rxq_hw_index_min)
1065                         rxq_hw_index_min = rxq->hw_index;
1066
1067                 if (rxq->hw_index > rxq_hw_index_max)
1068                         rxq_hw_index_max = rxq->hw_index;
1069         }
1070
1071         rss_hf = (rss_conf != NULL) ? rss_conf->rss_hf : SFC_RSS_OFFLOADS;
1072         if ((rss_hf & ~SFC_RSS_OFFLOADS) != 0)
1073                 return -EINVAL;
1074
1075         if (rss_conf != NULL) {
1076                 if (rss_conf->rss_key_len != sizeof(sa->rss_key))
1077                         return -EINVAL;
1078
1079                 rss_key = rss_conf->rss_key;
1080         } else {
1081                 rss_key = sa->rss_key;
1082         }
1083
1084         flow->rss = B_TRUE;
1085
1086         sfc_rss_conf->rxq_hw_index_min = rxq_hw_index_min;
1087         sfc_rss_conf->rxq_hw_index_max = rxq_hw_index_max;
1088         sfc_rss_conf->rss_hash_types = sfc_rte_to_efx_hash_type(rss_hf);
1089         rte_memcpy(sfc_rss_conf->rss_key, rss_key, sizeof(sa->rss_key));
1090
1091         for (i = 0; i < RTE_DIM(sfc_rss_conf->rss_tbl); ++i) {
1092                 unsigned int rxq_sw_index = rss->queue[i % rss->num];
1093                 struct sfc_rxq *rxq = sa->rxq_info[rxq_sw_index].rxq;
1094
1095                 sfc_rss_conf->rss_tbl[i] = rxq->hw_index - rxq_hw_index_min;
1096         }
1097
1098         return 0;
1099 }
1100 #endif /* EFSYS_OPT_RX_SCALE */
1101
1102 static int
1103 sfc_flow_filter_insert(struct sfc_adapter *sa,
1104                        struct rte_flow *flow)
1105 {
1106         efx_filter_spec_t *spec = &flow->spec;
1107
1108 #if EFSYS_OPT_RX_SCALE
1109         struct sfc_flow_rss *rss = &flow->rss_conf;
1110         int rc = 0;
1111
1112         if (flow->rss) {
1113                 unsigned int rss_spread = MIN(rss->rxq_hw_index_max -
1114                                               rss->rxq_hw_index_min + 1,
1115                                               EFX_MAXRSS);
1116
1117                 rc = efx_rx_scale_context_alloc(sa->nic,
1118                                                 EFX_RX_SCALE_EXCLUSIVE,
1119                                                 rss_spread,
1120                                                 &spec->efs_rss_context);
1121                 if (rc != 0)
1122                         goto fail_scale_context_alloc;
1123
1124                 rc = efx_rx_scale_mode_set(sa->nic, spec->efs_rss_context,
1125                                            EFX_RX_HASHALG_TOEPLITZ,
1126                                            rss->rss_hash_types, B_TRUE);
1127                 if (rc != 0)
1128                         goto fail_scale_mode_set;
1129
1130                 rc = efx_rx_scale_key_set(sa->nic, spec->efs_rss_context,
1131                                           rss->rss_key,
1132                                           sizeof(sa->rss_key));
1133                 if (rc != 0)
1134                         goto fail_scale_key_set;
1135
1136                 spec->efs_dmaq_id = rss->rxq_hw_index_min;
1137                 spec->efs_flags |= EFX_FILTER_FLAG_RX_RSS;
1138         }
1139
1140         rc = efx_filter_insert(sa->nic, spec);
1141         if (rc != 0)
1142                 goto fail_filter_insert;
1143
1144         if (flow->rss) {
1145                 /*
1146                  * Scale table is set after filter insertion because
1147                  * the table entries are relative to the base RxQ ID
1148                  * and the latter is submitted to the HW by means of
1149                  * inserting a filter, so by the time of the request
1150                  * the HW knows all the information needed to verify
1151                  * the table entries, and the operation will succeed
1152                  */
1153                 rc = efx_rx_scale_tbl_set(sa->nic, spec->efs_rss_context,
1154                                           rss->rss_tbl, RTE_DIM(rss->rss_tbl));
1155                 if (rc != 0)
1156                         goto fail_scale_tbl_set;
1157         }
1158
1159         return 0;
1160
1161 fail_scale_tbl_set:
1162         efx_filter_remove(sa->nic, spec);
1163
1164 fail_filter_insert:
1165 fail_scale_key_set:
1166 fail_scale_mode_set:
1167         if (flow->rss)
1168                 efx_rx_scale_context_free(sa->nic, spec->efs_rss_context);
1169
1170 fail_scale_context_alloc:
1171         return rc;
1172 #else /* !EFSYS_OPT_RX_SCALE */
1173         return efx_filter_insert(sa->nic, spec);
1174 #endif /* EFSYS_OPT_RX_SCALE */
1175 }
1176
1177 static int
1178 sfc_flow_filter_remove(struct sfc_adapter *sa,
1179                        struct rte_flow *flow)
1180 {
1181         efx_filter_spec_t *spec = &flow->spec;
1182         int rc = 0;
1183
1184         rc = efx_filter_remove(sa->nic, spec);
1185         if (rc != 0)
1186                 return rc;
1187
1188 #if EFSYS_OPT_RX_SCALE
1189         if (flow->rss)
1190                 rc = efx_rx_scale_context_free(sa->nic, spec->efs_rss_context);
1191 #endif /* EFSYS_OPT_RX_SCALE */
1192
1193         return rc;
1194 }
1195
1196 static int
1197 sfc_flow_parse_actions(struct sfc_adapter *sa,
1198                        const struct rte_flow_action actions[],
1199                        struct rte_flow *flow,
1200                        struct rte_flow_error *error)
1201 {
1202         int rc;
1203         boolean_t is_specified = B_FALSE;
1204
1205         if (actions == NULL) {
1206                 rte_flow_error_set(error, EINVAL,
1207                                    RTE_FLOW_ERROR_TYPE_ACTION_NUM, NULL,
1208                                    "NULL actions");
1209                 return -rte_errno;
1210         }
1211
1212         for (; actions->type != RTE_FLOW_ACTION_TYPE_END; actions++) {
1213                 switch (actions->type) {
1214                 case RTE_FLOW_ACTION_TYPE_VOID:
1215                         break;
1216
1217                 case RTE_FLOW_ACTION_TYPE_QUEUE:
1218                         rc = sfc_flow_parse_queue(sa, actions->conf, flow);
1219                         if (rc != 0) {
1220                                 rte_flow_error_set(error, EINVAL,
1221                                         RTE_FLOW_ERROR_TYPE_ACTION, actions,
1222                                         "Bad QUEUE action");
1223                                 return -rte_errno;
1224                         }
1225
1226                         is_specified = B_TRUE;
1227                         break;
1228
1229 #if EFSYS_OPT_RX_SCALE
1230                 case RTE_FLOW_ACTION_TYPE_RSS:
1231                         rc = sfc_flow_parse_rss(sa, actions->conf, flow);
1232                         if (rc != 0) {
1233                                 rte_flow_error_set(error, rc,
1234                                         RTE_FLOW_ERROR_TYPE_ACTION, actions,
1235                                         "Bad RSS action");
1236                                 return -rte_errno;
1237                         }
1238
1239                         is_specified = B_TRUE;
1240                         break;
1241 #endif /* EFSYS_OPT_RX_SCALE */
1242
1243                 default:
1244                         rte_flow_error_set(error, ENOTSUP,
1245                                            RTE_FLOW_ERROR_TYPE_ACTION, actions,
1246                                            "Action is not supported");
1247                         return -rte_errno;
1248                 }
1249         }
1250
1251         if (!is_specified) {
1252                 rte_flow_error_set(error, EINVAL,
1253                                    RTE_FLOW_ERROR_TYPE_ACTION_NUM, actions,
1254                                    "Action is unspecified");
1255                 return -rte_errno;
1256         }
1257
1258         return 0;
1259 }
1260
1261 static int
1262 sfc_flow_parse(struct rte_eth_dev *dev,
1263                const struct rte_flow_attr *attr,
1264                const struct rte_flow_item pattern[],
1265                const struct rte_flow_action actions[],
1266                struct rte_flow *flow,
1267                struct rte_flow_error *error)
1268 {
1269         struct sfc_adapter *sa = dev->data->dev_private;
1270         int rc;
1271
1272         rc = sfc_flow_parse_attr(attr, flow, error);
1273         if (rc != 0)
1274                 goto fail_bad_value;
1275
1276         rc = sfc_flow_parse_pattern(pattern, flow, error);
1277         if (rc != 0)
1278                 goto fail_bad_value;
1279
1280         rc = sfc_flow_parse_actions(sa, actions, flow, error);
1281         if (rc != 0)
1282                 goto fail_bad_value;
1283
1284         if (!sfc_filter_is_match_supported(sa, flow->spec.efs_match_flags)) {
1285                 rte_flow_error_set(error, ENOTSUP,
1286                                    RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
1287                                    "Flow rule pattern is not supported");
1288                 return -rte_errno;
1289         }
1290
1291 fail_bad_value:
1292         return rc;
1293 }
1294
1295 static int
1296 sfc_flow_validate(struct rte_eth_dev *dev,
1297                   const struct rte_flow_attr *attr,
1298                   const struct rte_flow_item pattern[],
1299                   const struct rte_flow_action actions[],
1300                   struct rte_flow_error *error)
1301 {
1302         struct rte_flow flow;
1303
1304         memset(&flow, 0, sizeof(flow));
1305
1306         return sfc_flow_parse(dev, attr, pattern, actions, &flow, error);
1307 }
1308
1309 static struct rte_flow *
1310 sfc_flow_create(struct rte_eth_dev *dev,
1311                 const struct rte_flow_attr *attr,
1312                 const struct rte_flow_item pattern[],
1313                 const struct rte_flow_action actions[],
1314                 struct rte_flow_error *error)
1315 {
1316         struct sfc_adapter *sa = dev->data->dev_private;
1317         struct rte_flow *flow = NULL;
1318         int rc;
1319
1320         flow = rte_zmalloc("sfc_rte_flow", sizeof(*flow), 0);
1321         if (flow == NULL) {
1322                 rte_flow_error_set(error, ENOMEM,
1323                                    RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
1324                                    "Failed to allocate memory");
1325                 goto fail_no_mem;
1326         }
1327
1328         rc = sfc_flow_parse(dev, attr, pattern, actions, flow, error);
1329         if (rc != 0)
1330                 goto fail_bad_value;
1331
1332         TAILQ_INSERT_TAIL(&sa->filter.flow_list, flow, entries);
1333
1334         sfc_adapter_lock(sa);
1335
1336         if (sa->state == SFC_ADAPTER_STARTED) {
1337                 rc = sfc_flow_filter_insert(sa, flow);
1338                 if (rc != 0) {
1339                         rte_flow_error_set(error, rc,
1340                                 RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
1341                                 "Failed to insert filter");
1342                         goto fail_filter_insert;
1343                 }
1344         }
1345
1346         sfc_adapter_unlock(sa);
1347
1348         return flow;
1349
1350 fail_filter_insert:
1351         TAILQ_REMOVE(&sa->filter.flow_list, flow, entries);
1352
1353 fail_bad_value:
1354         rte_free(flow);
1355         sfc_adapter_unlock(sa);
1356
1357 fail_no_mem:
1358         return NULL;
1359 }
1360
1361 static int
1362 sfc_flow_remove(struct sfc_adapter *sa,
1363                 struct rte_flow *flow,
1364                 struct rte_flow_error *error)
1365 {
1366         int rc = 0;
1367
1368         SFC_ASSERT(sfc_adapter_is_locked(sa));
1369
1370         if (sa->state == SFC_ADAPTER_STARTED) {
1371                 rc = sfc_flow_filter_remove(sa, flow);
1372                 if (rc != 0)
1373                         rte_flow_error_set(error, rc,
1374                                 RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
1375                                 "Failed to destroy flow rule");
1376         }
1377
1378         TAILQ_REMOVE(&sa->filter.flow_list, flow, entries);
1379         rte_free(flow);
1380
1381         return rc;
1382 }
1383
1384 static int
1385 sfc_flow_destroy(struct rte_eth_dev *dev,
1386                  struct rte_flow *flow,
1387                  struct rte_flow_error *error)
1388 {
1389         struct sfc_adapter *sa = dev->data->dev_private;
1390         struct rte_flow *flow_ptr;
1391         int rc = EINVAL;
1392
1393         sfc_adapter_lock(sa);
1394
1395         TAILQ_FOREACH(flow_ptr, &sa->filter.flow_list, entries) {
1396                 if (flow_ptr == flow)
1397                         rc = 0;
1398         }
1399         if (rc != 0) {
1400                 rte_flow_error_set(error, rc,
1401                                    RTE_FLOW_ERROR_TYPE_HANDLE, NULL,
1402                                    "Failed to find flow rule to destroy");
1403                 goto fail_bad_value;
1404         }
1405
1406         rc = sfc_flow_remove(sa, flow, error);
1407
1408 fail_bad_value:
1409         sfc_adapter_unlock(sa);
1410
1411         return -rc;
1412 }
1413
1414 static int
1415 sfc_flow_flush(struct rte_eth_dev *dev,
1416                struct rte_flow_error *error)
1417 {
1418         struct sfc_adapter *sa = dev->data->dev_private;
1419         struct rte_flow *flow;
1420         int rc = 0;
1421         int ret = 0;
1422
1423         sfc_adapter_lock(sa);
1424
1425         while ((flow = TAILQ_FIRST(&sa->filter.flow_list)) != NULL) {
1426                 rc = sfc_flow_remove(sa, flow, error);
1427                 if (rc != 0)
1428                         ret = rc;
1429         }
1430
1431         sfc_adapter_unlock(sa);
1432
1433         return -ret;
1434 }
1435
1436 static int
1437 sfc_flow_isolate(struct rte_eth_dev *dev, int enable,
1438                  struct rte_flow_error *error)
1439 {
1440         struct sfc_adapter *sa = dev->data->dev_private;
1441         struct sfc_port *port = &sa->port;
1442         int ret = 0;
1443
1444         sfc_adapter_lock(sa);
1445         if (sa->state != SFC_ADAPTER_INITIALIZED) {
1446                 rte_flow_error_set(error, EBUSY,
1447                                    RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
1448                                    NULL, "please close the port first");
1449                 ret = -rte_errno;
1450         } else {
1451                 port->isolated = (enable) ? B_TRUE : B_FALSE;
1452         }
1453         sfc_adapter_unlock(sa);
1454
1455         return ret;
1456 }
1457
1458 const struct rte_flow_ops sfc_flow_ops = {
1459         .validate = sfc_flow_validate,
1460         .create = sfc_flow_create,
1461         .destroy = sfc_flow_destroy,
1462         .flush = sfc_flow_flush,
1463         .query = NULL,
1464         .isolate = sfc_flow_isolate,
1465 };
1466
1467 void
1468 sfc_flow_init(struct sfc_adapter *sa)
1469 {
1470         SFC_ASSERT(sfc_adapter_is_locked(sa));
1471
1472         TAILQ_INIT(&sa->filter.flow_list);
1473 }
1474
1475 void
1476 sfc_flow_fini(struct sfc_adapter *sa)
1477 {
1478         struct rte_flow *flow;
1479
1480         SFC_ASSERT(sfc_adapter_is_locked(sa));
1481
1482         while ((flow = TAILQ_FIRST(&sa->filter.flow_list)) != NULL) {
1483                 TAILQ_REMOVE(&sa->filter.flow_list, flow, entries);
1484                 rte_free(flow);
1485         }
1486 }
1487
1488 void
1489 sfc_flow_stop(struct sfc_adapter *sa)
1490 {
1491         struct rte_flow *flow;
1492
1493         SFC_ASSERT(sfc_adapter_is_locked(sa));
1494
1495         TAILQ_FOREACH(flow, &sa->filter.flow_list, entries)
1496                 sfc_flow_filter_remove(sa, flow);
1497 }
1498
1499 int
1500 sfc_flow_start(struct sfc_adapter *sa)
1501 {
1502         struct rte_flow *flow;
1503         int rc = 0;
1504
1505         sfc_log_init(sa, "entry");
1506
1507         SFC_ASSERT(sfc_adapter_is_locked(sa));
1508
1509         TAILQ_FOREACH(flow, &sa->filter.flow_list, entries) {
1510                 rc = sfc_flow_filter_insert(sa, flow);
1511                 if (rc != 0)
1512                         goto fail_bad_flow;
1513         }
1514
1515         sfc_log_init(sa, "done");
1516
1517 fail_bad_flow:
1518         return rc;
1519 }