drivers/net/mlx5/mlx5_flow.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright 2016 6WIND S.A.
   5  *   Copyright 2016 Mellanox.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of 6WIND S.A. nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include <sys/queue.h>
  35 #include <string.h>
  36
  37 /* Verbs header. */
  38 /* ISO C doesn't support unnamed structs/unions, disabling -pedantic. */
  39 #ifdef PEDANTIC
  40 #pragma GCC diagnostic ignored "-Wpedantic"
  41 #endif
  42 #include <infiniband/verbs.h>
  43 #ifdef PEDANTIC
  44 #pragma GCC diagnostic error "-Wpedantic"
  45 #endif
  46
  47 #include <rte_ethdev.h>
  48 #include <rte_flow.h>
  49 #include <rte_flow_driver.h>
  50 #include <rte_malloc.h>
  51
  52 #include "mlx5.h"
  53 #include "mlx5_prm.h"
  54
  55 static int
  56 mlx5_flow_create_eth(const struct rte_flow_item *item,
  57                      const void *default_mask,
  58                      void *data);
  59
  60 static int
  61 mlx5_flow_create_vlan(const struct rte_flow_item *item,
  62                       const void *default_mask,
  63                       void *data);
  64
  65 static int
  66 mlx5_flow_create_ipv4(const struct rte_flow_item *item,
  67                       const void *default_mask,
  68                       void *data);
  69
  70 static int
  71 mlx5_flow_create_ipv6(const struct rte_flow_item *item,
  72                       const void *default_mask,
  73                       void *data);
  74
  75 static int
  76 mlx5_flow_create_udp(const struct rte_flow_item *item,
  77                      const void *default_mask,
  78                      void *data);
  79
  80 static int
  81 mlx5_flow_create_tcp(const struct rte_flow_item *item,
  82                      const void *default_mask,
  83                      void *data);
  84
  85 static int
  86 mlx5_flow_create_vxlan(const struct rte_flow_item *item,
  87                        const void *default_mask,
  88                        void *data);
  89
  90 struct rte_flow {
  91         LIST_ENTRY(rte_flow) next; /**< Pointer to the next flow structure. */
  92         struct ibv_exp_flow_attr *ibv_attr; /**< Pointer to Verbs attributes. */
  93         struct ibv_exp_rwq_ind_table *ind_table; /**< Indirection table. */
  94         struct ibv_qp *qp; /**< Verbs queue pair. */
  95         struct ibv_exp_flow *ibv_flow; /**< Verbs flow. */
  96         struct ibv_exp_wq *wq; /**< Verbs work queue. */
  97         struct ibv_cq *cq; /**< Verbs completion queue. */
  98         struct rxq *rxq; /**< Pointer to the queue, NULL if drop queue. */
  99         uint32_t mark:1; /**< Set if the flow is marked. */
 100 };
 101
 102 /** Static initializer for items. */
 103 #define ITEMS(...) \
 104         (const enum rte_flow_item_type []){ \
 105                 __VA_ARGS__, RTE_FLOW_ITEM_TYPE_END, \
 106         }
 107
 108 /** Structure to generate a simple graph of layers supported by the NIC. */
 109 struct mlx5_flow_items {
 110         /** List of possible actions for these items. */
 111         const enum rte_flow_action_type *const actions;
 112         /** Bit-masks corresponding to the possibilities for the item. */
 113         const void *mask;
 114         /** Bit-masks size in bytes. */
 115         const unsigned int mask_sz;
 116         /**
 117          * Conversion function from rte_flow to NIC specific flow.
 118          *
 119          * @param item
 120          *   rte_flow item to convert.
 121          * @param default_mask
 122          *   Default bit-masks to use when item->mask is not provided.
 123          * @param data
 124          *   Internal structure to store the conversion.
 125          *
 126          * @return
 127          *   0 on success, negative value otherwise.
 128          */
 129         int (*convert)(const struct rte_flow_item *item,
 130                        const void *default_mask,
 131                        void *data);
 132         /** Size in bytes of the destination structure. */
 133         const unsigned int dst_sz;
 134         /** List of possible following items.  */
 135         const enum rte_flow_item_type *const items;
 136 };
 137
 138 /** Valid action for this PMD. */
 139 static const enum rte_flow_action_type valid_actions[] = {
 140         RTE_FLOW_ACTION_TYPE_DROP,
 141         RTE_FLOW_ACTION_TYPE_QUEUE,
 142         RTE_FLOW_ACTION_TYPE_MARK,
 143         RTE_FLOW_ACTION_TYPE_END,
 144 };
 145
 146 /** Graph of supported items and associated actions. */
 147 static const struct mlx5_flow_items mlx5_flow_items[] = {
 148         [RTE_FLOW_ITEM_TYPE_END] = {
 149                 .items = ITEMS(RTE_FLOW_ITEM_TYPE_ETH,
 150                                RTE_FLOW_ITEM_TYPE_VXLAN),
 151         },
 152         [RTE_FLOW_ITEM_TYPE_ETH] = {
 153                 .items = ITEMS(RTE_FLOW_ITEM_TYPE_VLAN,
 154                                RTE_FLOW_ITEM_TYPE_IPV4,
 155                                RTE_FLOW_ITEM_TYPE_IPV6),
 156                 .actions = valid_actions,
 157                 .mask = &(const struct rte_flow_item_eth){
 158                         .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 159                         .src.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 160                 },
 161                 .mask_sz = sizeof(struct rte_flow_item_eth),
 162                 .convert = mlx5_flow_create_eth,
 163                 .dst_sz = sizeof(struct ibv_exp_flow_spec_eth),
 164         },
 165         [RTE_FLOW_ITEM_TYPE_VLAN] = {
 166                 .items = ITEMS(RTE_FLOW_ITEM_TYPE_IPV4,
 167                                RTE_FLOW_ITEM_TYPE_IPV6),
 168                 .actions = valid_actions,
 169                 .mask = &(const struct rte_flow_item_vlan){
 170                         .tci = -1,
 171                 },
 172                 .mask_sz = sizeof(struct rte_flow_item_vlan),
 173                 .convert = mlx5_flow_create_vlan,
 174                 .dst_sz = 0,
 175         },
 176         [RTE_FLOW_ITEM_TYPE_IPV4] = {
 177                 .items = ITEMS(RTE_FLOW_ITEM_TYPE_UDP,
 178                                RTE_FLOW_ITEM_TYPE_TCP),
 179                 .actions = valid_actions,
 180                 .mask = &(const struct rte_flow_item_ipv4){
 181                         .hdr = {
 182                                 .src_addr = -1,
 183                                 .dst_addr = -1,
 184                         },
 185                 },
 186                 .mask_sz = sizeof(struct rte_flow_item_ipv4),
 187                 .convert = mlx5_flow_create_ipv4,
 188                 .dst_sz = sizeof(struct ibv_exp_flow_spec_ipv4),
 189         },
 190         [RTE_FLOW_ITEM_TYPE_IPV6] = {
 191                 .items = ITEMS(RTE_FLOW_ITEM_TYPE_UDP,
 192                                RTE_FLOW_ITEM_TYPE_TCP),
 193                 .actions = valid_actions,
 194                 .mask = &(const struct rte_flow_item_ipv6){
 195                         .hdr = {
 196                                 .src_addr = {
 197                                         0xff, 0xff, 0xff, 0xff,
 198                                         0xff, 0xff, 0xff, 0xff,
 199                                         0xff, 0xff, 0xff, 0xff,
 200                                         0xff, 0xff, 0xff, 0xff,
 201                                 },
 202                                 .dst_addr = {
 203                                         0xff, 0xff, 0xff, 0xff,
 204                                         0xff, 0xff, 0xff, 0xff,
 205                                         0xff, 0xff, 0xff, 0xff,
 206                                         0xff, 0xff, 0xff, 0xff,
 207                                 },
 208                         },
 209                 },
 210                 .mask_sz = sizeof(struct rte_flow_item_ipv6),
 211                 .convert = mlx5_flow_create_ipv6,
 212                 .dst_sz = sizeof(struct ibv_exp_flow_spec_ipv6),
 213         },
 214         [RTE_FLOW_ITEM_TYPE_UDP] = {
 215                 .items = ITEMS(RTE_FLOW_ITEM_TYPE_VXLAN),
 216                 .actions = valid_actions,
 217                 .mask = &(const struct rte_flow_item_udp){
 218                         .hdr = {
 219                                 .src_port = -1,
 220                                 .dst_port = -1,
 221                         },
 222                 },
 223                 .mask_sz = sizeof(struct rte_flow_item_udp),
 224                 .convert = mlx5_flow_create_udp,
 225                 .dst_sz = sizeof(struct ibv_exp_flow_spec_tcp_udp),
 226         },
 227         [RTE_FLOW_ITEM_TYPE_TCP] = {
 228                 .actions = valid_actions,
 229                 .mask = &(const struct rte_flow_item_tcp){
 230                         .hdr = {
 231                                 .src_port = -1,
 232                                 .dst_port = -1,
 233                         },
 234                 },
 235                 .mask_sz = sizeof(struct rte_flow_item_tcp),
 236                 .convert = mlx5_flow_create_tcp,
 237                 .dst_sz = sizeof(struct ibv_exp_flow_spec_tcp_udp),
 238         },
 239         [RTE_FLOW_ITEM_TYPE_VXLAN] = {
 240                 .items = ITEMS(RTE_FLOW_ITEM_TYPE_ETH),
 241                 .actions = valid_actions,
 242                 .mask = &(const struct rte_flow_item_vxlan){
 243                         .vni = "\xff\xff\xff",
 244                 },
 245                 .mask_sz = sizeof(struct rte_flow_item_vxlan),
 246                 .convert = mlx5_flow_create_vxlan,
 247                 .dst_sz = sizeof(struct ibv_exp_flow_spec_tunnel),
 248         },
 249 };
 250
 251 /** Structure to pass to the conversion function. */
 252 struct mlx5_flow {
 253         struct ibv_exp_flow_attr *ibv_attr; /**< Verbs attribute. */
 254         unsigned int offset; /**< Offset in bytes in the ibv_attr buffer. */
 255         uint32_t inner; /**< Set once VXLAN is encountered. */
 256 };
 257
 258 struct mlx5_flow_action {
 259         uint32_t queue:1; /**< Target is a receive queue. */
 260         uint32_t drop:1; /**< Target is a drop queue. */
 261         uint32_t mark:1; /**< Mark is present in the flow. */
 262         uint32_t queue_id; /**< Identifier of the queue. */
 263         uint32_t mark_id; /**< Mark identifier. */
 264 };
 265
 266 /**
 267  * Check support for a given item.
 268  *
 269  * @param item[in]
 270  *   Item specification.
 271  * @param mask[in]
 272  *   Bit-masks covering supported fields to compare with spec, last and mask in
 273  *   \item.
 274  * @param size
 275  *   Bit-Mask size in bytes.
 276  *
 277  * @return
 278  *   0 on success.
 279  */
 280 static int
 281 mlx5_flow_item_validate(const struct rte_flow_item *item,
 282                         const uint8_t *mask, unsigned int size)
 283 {
 284         int ret = 0;
 285
 286         if (!item->spec && (item->mask || item->last))
 287                 return -1;
 288         if (item->spec && !item->mask) {
 289                 unsigned int i;
 290                 const uint8_t *spec = item->spec;
 291
 292                 for (i = 0; i < size; ++i)
 293                         if ((spec[i] | mask[i]) != mask[i])
 294                                 return -1;
 295         }
 296         if (item->last && !item->mask) {
 297                 unsigned int i;
 298                 const uint8_t *spec = item->last;
 299
 300                 for (i = 0; i < size; ++i)
 301                         if ((spec[i] | mask[i]) != mask[i])
 302                                 return -1;
 303         }
 304         if (item->mask) {
 305                 unsigned int i;
 306                 const uint8_t *spec = item->mask;
 307
 308                 for (i = 0; i < size; ++i)
 309                         if ((spec[i] | mask[i]) != mask[i])
 310                                 return -1;
 311         }
 312         if (item->spec && item->last) {
 313                 uint8_t spec[size];
 314                 uint8_t last[size];
 315                 const uint8_t *apply = mask;
 316                 unsigned int i;
 317
 318                 if (item->mask)
 319                         apply = item->mask;
 320                 for (i = 0; i < size; ++i) {
 321                         spec[i] = ((const uint8_t *)item->spec)[i] & apply[i];
 322                         last[i] = ((const uint8_t *)item->last)[i] & apply[i];
 323                 }
 324                 ret = memcmp(spec, last, size);
 325         }
 326         return ret;
 327 }
 328
 329 /**
 330  * Validate a flow supported by the NIC.
 331  *
 332  * @param priv
 333  *   Pointer to private structure.
 334  * @param[in] attr
 335  *   Flow rule attributes.
 336  * @param[in] pattern
 337  *   Pattern specification (list terminated by the END pattern item).
 338  * @param[in] actions
 339  *   Associated actions (list terminated by the END action).
 340  * @param[out] error
 341  *   Perform verbose error reporting if not NULL.
 342  * @param[in, out] flow
 343  *   Flow structure to update.
 344  *
 345  * @return
 346  *   0 on success, a negative errno value otherwise and rte_errno is set.
 347  */
 348 static int
 349 priv_flow_validate(struct priv *priv,
 350                    const struct rte_flow_attr *attr,
 351                    const struct rte_flow_item items[],
 352                    const struct rte_flow_action actions[],
 353                    struct rte_flow_error *error,
 354                    struct mlx5_flow *flow)
 355 {
 356         const struct mlx5_flow_items *cur_item = mlx5_flow_items;
 357         struct mlx5_flow_action action = {
 358                 .queue = 0,
 359                 .drop = 0,
 360                 .mark = 0,
 361         };
 362
 363         (void)priv;
 364         if (attr->group) {
 365                 rte_flow_error_set(error, ENOTSUP,
 366                                    RTE_FLOW_ERROR_TYPE_ATTR_GROUP,
 367                                    NULL,
 368                                    "groups are not supported");
 369                 return -rte_errno;
 370         }
 371         if (attr->priority) {
 372                 rte_flow_error_set(error, ENOTSUP,
 373                                    RTE_FLOW_ERROR_TYPE_ATTR_PRIORITY,
 374                                    NULL,
 375                                    "priorities are not supported");
 376                 return -rte_errno;
 377         }
 378         if (attr->egress) {
 379                 rte_flow_error_set(error, ENOTSUP,
 380                                    RTE_FLOW_ERROR_TYPE_ATTR_EGRESS,
 381                                    NULL,
 382                                    "egress is not supported");
 383                 return -rte_errno;
 384         }
 385         if (!attr->ingress) {
 386                 rte_flow_error_set(error, ENOTSUP,
 387                                    RTE_FLOW_ERROR_TYPE_ATTR_INGRESS,
 388                                    NULL,
 389                                    "only ingress is supported");
 390                 return -rte_errno;
 391         }
 392         for (; items->type != RTE_FLOW_ITEM_TYPE_END; ++items) {
 393                 const struct mlx5_flow_items *token = NULL;
 394                 unsigned int i;
 395                 int err;
 396
 397                 if (items->type == RTE_FLOW_ITEM_TYPE_VOID)
 398                         continue;
 399                 /* Handle special situation for VLAN. */
 400                 if (items->type == RTE_FLOW_ITEM_TYPE_VLAN) {
 401                         if (((const struct rte_flow_item_vlan *)items)->tci >
 402                             ETHER_MAX_VLAN_ID) {
 403                                 rte_flow_error_set(error, ENOTSUP,
 404                                                    RTE_FLOW_ERROR_TYPE_ITEM,
 405                                                    items,
 406                                                    "wrong VLAN id value");
 407                                 return -rte_errno;
 408                         }
 409                 }
 410                 for (i = 0;
 411                      cur_item->items &&
 412                      cur_item->items[i] != RTE_FLOW_ITEM_TYPE_END;
 413                      ++i) {
 414                         if (cur_item->items[i] == items->type) {
 415                                 token = &mlx5_flow_items[items->type];
 416                                 break;
 417                         }
 418                 }
 419                 if (!token)
 420                         goto exit_item_not_supported;
 421                 cur_item = token;
 422                 err = mlx5_flow_item_validate(items,
 423                                               (const uint8_t *)cur_item->mask,
 424                                               sizeof(cur_item->mask_sz));
 425                 if (err)
 426                         goto exit_item_not_supported;
 427                 if (flow->ibv_attr && cur_item->convert) {
 428                         err = cur_item->convert(items, cur_item->mask, flow);
 429                         if (err)
 430                                 goto exit_item_not_supported;
 431                 }
 432                 flow->offset += cur_item->dst_sz;
 433         }
 434         for (; actions->type != RTE_FLOW_ACTION_TYPE_END; ++actions) {
 435                 if (actions->type == RTE_FLOW_ACTION_TYPE_VOID) {
 436                         continue;
 437                 } else if (actions->type == RTE_FLOW_ACTION_TYPE_DROP) {
 438                         action.drop = 1;
 439                 } else if (actions->type == RTE_FLOW_ACTION_TYPE_QUEUE) {
 440                         const struct rte_flow_action_queue *queue =
 441                                 (const struct rte_flow_action_queue *)
 442                                 actions->conf;
 443
 444                         if (!queue || (queue->index > (priv->rxqs_n - 1)))
 445                                 goto exit_action_not_supported;
 446                         action.queue = 1;
 447                 } else if (actions->type == RTE_FLOW_ACTION_TYPE_MARK) {
 448                         const struct rte_flow_action_mark *mark =
 449                                 (const struct rte_flow_action_mark *)
 450                                 actions->conf;
 451
 452                         if (mark && (mark->id >= MLX5_FLOW_MARK_MAX)) {
 453                                 rte_flow_error_set(error, ENOTSUP,
 454                                                    RTE_FLOW_ERROR_TYPE_ACTION,
 455                                                    actions,
 456                                                    "mark must be between 0"
 457                                                    " and 16777199");
 458                                 return -rte_errno;
 459                         }
 460                         action.mark = 1;
 461                 } else {
 462                         goto exit_action_not_supported;
 463                 }
 464         }
 465         if (action.mark && !flow->ibv_attr)
 466                 flow->offset += sizeof(struct ibv_exp_flow_spec_action_tag);
 467         if (!action.queue && !action.drop) {
 468                 rte_flow_error_set(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_HANDLE,
 469                                    NULL, "no valid action");
 470                 return -rte_errno;
 471         }
 472         return 0;
 473 exit_item_not_supported:
 474         rte_flow_error_set(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ITEM,
 475                            items, "item not supported");
 476         return -rte_errno;
 477 exit_action_not_supported:
 478         rte_flow_error_set(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ACTION,
 479                            actions, "action not supported");
 480         return -rte_errno;
 481 }
 482
 483 /**
 484  * Validate a flow supported by the NIC.
 485  *
 486  * @see rte_flow_validate()
 487  * @see rte_flow_ops
 488  */
 489 int
 490 mlx5_flow_validate(struct rte_eth_dev *dev,
 491                    const struct rte_flow_attr *attr,
 492                    const struct rte_flow_item items[],
 493                    const struct rte_flow_action actions[],
 494                    struct rte_flow_error *error)
 495 {
 496         struct priv *priv = dev->data->dev_private;
 497         int ret;
 498         struct mlx5_flow flow = { .offset = sizeof(struct ibv_exp_flow_attr) };
 499
 500         priv_lock(priv);
 501         ret = priv_flow_validate(priv, attr, items, actions, error, &flow);
 502         priv_unlock(priv);
 503         return ret;
 504 }
 505
 506 /**
 507  * Convert Ethernet item to Verbs specification.
 508  *
 509  * @param item[in]
 510  *   Item specification.
 511  * @param default_mask[in]
 512  *   Default bit-masks to use when item->mask is not provided.
 513  * @param data[in, out]
 514  *   User structure.
 515  */
 516 static int
 517 mlx5_flow_create_eth(const struct rte_flow_item *item,
 518                      const void *default_mask,
 519                      void *data)
 520 {
 521         const struct rte_flow_item_eth *spec = item->spec;
 522         const struct rte_flow_item_eth *mask = item->mask;
 523         struct mlx5_flow *flow = (struct mlx5_flow *)data;
 524         struct ibv_exp_flow_spec_eth *eth;
 525         const unsigned int eth_size = sizeof(struct ibv_exp_flow_spec_eth);
 526         unsigned int i;
 527
 528         ++flow->ibv_attr->num_of_specs;
 529         flow->ibv_attr->priority = 2;
 530         eth = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
 531         *eth = (struct ibv_exp_flow_spec_eth) {
 532                 .type = flow->inner | IBV_EXP_FLOW_SPEC_ETH,
 533                 .size = eth_size,
 534         };
 535         if (!spec)
 536                 return 0;
 537         if (!mask)
 538                 mask = default_mask;
 539         memcpy(eth->val.dst_mac, spec->dst.addr_bytes, ETHER_ADDR_LEN);
 540         memcpy(eth->val.src_mac, spec->src.addr_bytes, ETHER_ADDR_LEN);
 541         memcpy(eth->mask.dst_mac, mask->dst.addr_bytes, ETHER_ADDR_LEN);
 542         memcpy(eth->mask.src_mac, mask->src.addr_bytes, ETHER_ADDR_LEN);
 543         /* Remove unwanted bits from values. */
 544         for (i = 0; i < ETHER_ADDR_LEN; ++i) {
 545                 eth->val.dst_mac[i] &= eth->mask.dst_mac[i];
 546                 eth->val.src_mac[i] &= eth->mask.src_mac[i];
 547         }
 548         return 0;
 549 }
 550
 551 /**
 552  * Convert VLAN item to Verbs specification.
 553  *
 554  * @param item[in]
 555  *   Item specification.
 556  * @param default_mask[in]
 557  *   Default bit-masks to use when item->mask is not provided.
 558  * @param data[in, out]
 559  *   User structure.
 560  */
 561 static int
 562 mlx5_flow_create_vlan(const struct rte_flow_item *item,
 563                       const void *default_mask,
 564                       void *data)
 565 {
 566         const struct rte_flow_item_vlan *spec = item->spec;
 567         const struct rte_flow_item_vlan *mask = item->mask;
 568         struct mlx5_flow *flow = (struct mlx5_flow *)data;
 569         struct ibv_exp_flow_spec_eth *eth;
 570         const unsigned int eth_size = sizeof(struct ibv_exp_flow_spec_eth);
 571
 572         eth = (void *)((uintptr_t)flow->ibv_attr + flow->offset - eth_size);
 573         if (!spec)
 574                 return 0;
 575         if (!mask)
 576                 mask = default_mask;
 577         eth->val.vlan_tag = spec->tci;
 578         eth->mask.vlan_tag = mask->tci;
 579         eth->val.vlan_tag &= eth->mask.vlan_tag;
 580         return 0;
 581 }
 582
 583 /**
 584  * Convert IPv4 item to Verbs specification.
 585  *
 586  * @param item[in]
 587  *   Item specification.
 588  * @param default_mask[in]
 589  *   Default bit-masks to use when item->mask is not provided.
 590  * @param data[in, out]
 591  *   User structure.
 592  */
 593 static int
 594 mlx5_flow_create_ipv4(const struct rte_flow_item *item,
 595                       const void *default_mask,
 596                       void *data)
 597 {
 598         const struct rte_flow_item_ipv4 *spec = item->spec;
 599         const struct rte_flow_item_ipv4 *mask = item->mask;
 600         struct mlx5_flow *flow = (struct mlx5_flow *)data;
 601         struct ibv_exp_flow_spec_ipv4 *ipv4;
 602         unsigned int ipv4_size = sizeof(struct ibv_exp_flow_spec_ipv4);
 603
 604         ++flow->ibv_attr->num_of_specs;
 605         flow->ibv_attr->priority = 1;
 606         ipv4 = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
 607         *ipv4 = (struct ibv_exp_flow_spec_ipv4) {
 608                 .type = flow->inner | IBV_EXP_FLOW_SPEC_IPV4,
 609                 .size = ipv4_size,
 610         };
 611         if (!spec)
 612                 return 0;
 613         if (!mask)
 614                 mask = default_mask;
 615         ipv4->val = (struct ibv_exp_flow_ipv4_filter){
 616                 .src_ip = spec->hdr.src_addr,
 617                 .dst_ip = spec->hdr.dst_addr,
 618         };
 619         ipv4->mask = (struct ibv_exp_flow_ipv4_filter){
 620                 .src_ip = mask->hdr.src_addr,
 621                 .dst_ip = mask->hdr.dst_addr,
 622         };
 623         /* Remove unwanted bits from values. */
 624         ipv4->val.src_ip &= ipv4->mask.src_ip;
 625         ipv4->val.dst_ip &= ipv4->mask.dst_ip;
 626         return 0;
 627 }
 628
 629 /**
 630  * Convert IPv6 item to Verbs specification.
 631  *
 632  * @param item[in]
 633  *   Item specification.
 634  * @param default_mask[in]
 635  *   Default bit-masks to use when item->mask is not provided.
 636  * @param data[in, out]
 637  *   User structure.
 638  */
 639 static int
 640 mlx5_flow_create_ipv6(const struct rte_flow_item *item,
 641                       const void *default_mask,
 642                       void *data)
 643 {
 644         const struct rte_flow_item_ipv6 *spec = item->spec;
 645         const struct rte_flow_item_ipv6 *mask = item->mask;
 646         struct mlx5_flow *flow = (struct mlx5_flow *)data;
 647         struct ibv_exp_flow_spec_ipv6 *ipv6;
 648         unsigned int ipv6_size = sizeof(struct ibv_exp_flow_spec_ipv6);
 649         unsigned int i;
 650
 651         ++flow->ibv_attr->num_of_specs;
 652         flow->ibv_attr->priority = 1;
 653         ipv6 = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
 654         *ipv6 = (struct ibv_exp_flow_spec_ipv6) {
 655                 .type = flow->inner | IBV_EXP_FLOW_SPEC_IPV6,
 656                 .size = ipv6_size,
 657         };
 658         if (!spec)
 659                 return 0;
 660         if (!mask)
 661                 mask = default_mask;
 662         memcpy(ipv6->val.src_ip, spec->hdr.src_addr,
 663                RTE_DIM(ipv6->val.src_ip));
 664         memcpy(ipv6->val.dst_ip, spec->hdr.dst_addr,
 665                RTE_DIM(ipv6->val.dst_ip));
 666         memcpy(ipv6->mask.src_ip, mask->hdr.src_addr,
 667                RTE_DIM(ipv6->mask.src_ip));
 668         memcpy(ipv6->mask.dst_ip, mask->hdr.dst_addr,
 669                RTE_DIM(ipv6->mask.dst_ip));
 670         /* Remove unwanted bits from values. */
 671         for (i = 0; i < RTE_DIM(ipv6->val.src_ip); ++i) {
 672                 ipv6->val.src_ip[i] &= ipv6->mask.src_ip[i];
 673                 ipv6->val.dst_ip[i] &= ipv6->mask.dst_ip[i];
 674         }
 675         return 0;
 676 }
 677
 678 /**
 679  * Convert UDP item to Verbs specification.
 680  *
 681  * @param item[in]
 682  *   Item specification.
 683  * @param default_mask[in]
 684  *   Default bit-masks to use when item->mask is not provided.
 685  * @param data[in, out]
 686  *   User structure.
 687  */
 688 static int
 689 mlx5_flow_create_udp(const struct rte_flow_item *item,
 690                      const void *default_mask,
 691                      void *data)
 692 {
 693         const struct rte_flow_item_udp *spec = item->spec;
 694         const struct rte_flow_item_udp *mask = item->mask;
 695         struct mlx5_flow *flow = (struct mlx5_flow *)data;
 696         struct ibv_exp_flow_spec_tcp_udp *udp;
 697         unsigned int udp_size = sizeof(struct ibv_exp_flow_spec_tcp_udp);
 698
 699         ++flow->ibv_attr->num_of_specs;
 700         flow->ibv_attr->priority = 0;
 701         udp = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
 702         *udp = (struct ibv_exp_flow_spec_tcp_udp) {
 703                 .type = flow->inner | IBV_EXP_FLOW_SPEC_UDP,
 704                 .size = udp_size,
 705         };
 706         if (!spec)
 707                 return 0;
 708         if (!mask)
 709                 mask = default_mask;
 710         udp->val.dst_port = spec->hdr.dst_port;
 711         udp->val.src_port = spec->hdr.src_port;
 712         udp->mask.dst_port = mask->hdr.dst_port;
 713         udp->mask.src_port = mask->hdr.src_port;
 714         /* Remove unwanted bits from values. */
 715         udp->val.src_port &= udp->mask.src_port;
 716         udp->val.dst_port &= udp->mask.dst_port;
 717         return 0;
 718 }
 719
 720 /**
 721  * Convert TCP item to Verbs specification.
 722  *
 723  * @param item[in]
 724  *   Item specification.
 725  * @param default_mask[in]
 726  *   Default bit-masks to use when item->mask is not provided.
 727  * @param data[in, out]
 728  *   User structure.
 729  */
 730 static int
 731 mlx5_flow_create_tcp(const struct rte_flow_item *item,
 732                      const void *default_mask,
 733                      void *data)
 734 {
 735         const struct rte_flow_item_tcp *spec = item->spec;
 736         const struct rte_flow_item_tcp *mask = item->mask;
 737         struct mlx5_flow *flow = (struct mlx5_flow *)data;
 738         struct ibv_exp_flow_spec_tcp_udp *tcp;
 739         unsigned int tcp_size = sizeof(struct ibv_exp_flow_spec_tcp_udp);
 740
 741         ++flow->ibv_attr->num_of_specs;
 742         flow->ibv_attr->priority = 0;
 743         tcp = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
 744         *tcp = (struct ibv_exp_flow_spec_tcp_udp) {
 745                 .type = flow->inner | IBV_EXP_FLOW_SPEC_TCP,
 746                 .size = tcp_size,
 747         };
 748         if (!spec)
 749                 return 0;
 750         if (!mask)
 751                 mask = default_mask;
 752         tcp->val.dst_port = spec->hdr.dst_port;
 753         tcp->val.src_port = spec->hdr.src_port;
 754         tcp->mask.dst_port = mask->hdr.dst_port;
 755         tcp->mask.src_port = mask->hdr.src_port;
 756         /* Remove unwanted bits from values. */
 757         tcp->val.src_port &= tcp->mask.src_port;
 758         tcp->val.dst_port &= tcp->mask.dst_port;
 759         return 0;
 760 }
 761
 762 /**
 763  * Convert VXLAN item to Verbs specification.
 764  *
 765  * @param item[in]
 766  *   Item specification.
 767  * @param default_mask[in]
 768  *   Default bit-masks to use when item->mask is not provided.
 769  * @param data[in, out]
 770  *   User structure.
 771  */
 772 static int
 773 mlx5_flow_create_vxlan(const struct rte_flow_item *item,
 774                        const void *default_mask,
 775                        void *data)
 776 {
 777         const struct rte_flow_item_vxlan *spec = item->spec;
 778         const struct rte_flow_item_vxlan *mask = item->mask;
 779         struct mlx5_flow *flow = (struct mlx5_flow *)data;
 780         struct ibv_exp_flow_spec_tunnel *vxlan;
 781         unsigned int size = sizeof(struct ibv_exp_flow_spec_tunnel);
 782         union vni {
 783                 uint32_t vlan_id;
 784                 uint8_t vni[4];
 785         } id;
 786
 787         ++flow->ibv_attr->num_of_specs;
 788         flow->ibv_attr->priority = 0;
 789         id.vni[0] = 0;
 790         vxlan = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
 791         *vxlan = (struct ibv_exp_flow_spec_tunnel) {
 792                 .type = flow->inner | IBV_EXP_FLOW_SPEC_VXLAN_TUNNEL,
 793                 .size = size,
 794         };
 795         flow->inner = IBV_EXP_FLOW_SPEC_INNER;
 796         if (!spec)
 797                 return 0;
 798         if (!mask)
 799                 mask = default_mask;
 800         memcpy(&id.vni[1], spec->vni, 3);
 801         vxlan->val.tunnel_id = id.vlan_id;
 802         memcpy(&id.vni[1], mask->vni, 3);
 803         vxlan->mask.tunnel_id = id.vlan_id;
 804         /* Remove unwanted bits from values. */
 805         vxlan->val.tunnel_id &= vxlan->mask.tunnel_id;
 806         return 0;
 807 }
 808
 809 /**
 810  * Convert mark/flag action to Verbs specification.
 811  *
 812  * @param flow
 813  *   Pointer to MLX5 flow structure.
 814  * @param mark_id
 815  *   Mark identifier.
 816  */
 817 static int
 818 mlx5_flow_create_flag_mark(struct mlx5_flow *flow, uint32_t mark_id)
 819 {
 820         struct ibv_exp_flow_spec_action_tag *tag;
 821         unsigned int size = sizeof(struct ibv_exp_flow_spec_action_tag);
 822
 823         tag = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
 824         *tag = (struct ibv_exp_flow_spec_action_tag){
 825                 .type = IBV_EXP_FLOW_SPEC_ACTION_TAG,
 826                 .size = size,
 827                 .tag_id = mlx5_flow_mark_set(mark_id),
 828         };
 829         ++flow->ibv_attr->num_of_specs;
 830         return 0;
 831 }
 832
 833 /**
 834  * Complete flow rule creation.
 835  *
 836  * @param priv
 837  *   Pointer to private structure.
 838  * @param ibv_attr
 839  *   Verbs flow attributes.
 840  * @param action
 841  *   Target action structure.
 842  * @param[out] error
 843  *   Perform verbose error reporting if not NULL.
 844  *
 845  * @return
 846  *   A flow if the rule could be created.
 847  */
 848 static struct rte_flow *
 849 priv_flow_create_action_queue(struct priv *priv,
 850                               struct ibv_exp_flow_attr *ibv_attr,
 851                               struct mlx5_flow_action *action,
 852                               struct rte_flow_error *error)
 853 {
 854         struct rxq_ctrl *rxq;
 855         struct rte_flow *rte_flow;
 856
 857         assert(priv->pd);
 858         assert(priv->ctx);
 859         rte_flow = rte_calloc(__func__, 1, sizeof(*rte_flow), 0);
 860         if (!rte_flow) {
 861                 rte_flow_error_set(error, ENOMEM, RTE_FLOW_ERROR_TYPE_HANDLE,
 862                                    NULL, "cannot allocate flow memory");
 863                 return NULL;
 864         }
 865         if (action->drop) {
 866                 rte_flow->cq =
 867                         ibv_exp_create_cq(priv->ctx, 1, NULL, NULL, 0,
 868                                           &(struct ibv_exp_cq_init_attr){
 869                                                   .comp_mask = 0,
 870                                           });
 871                 if (!rte_flow->cq) {
 872                         rte_flow_error_set(error, ENOMEM,
 873                                            RTE_FLOW_ERROR_TYPE_HANDLE,
 874                                            NULL, "cannot allocate CQ");
 875                         goto error;
 876                 }
 877                 rte_flow->wq = ibv_exp_create_wq(priv->ctx,
 878                                                  &(struct ibv_exp_wq_init_attr){
 879                                                  .wq_type = IBV_EXP_WQT_RQ,
 880                                                  .max_recv_wr = 1,
 881                                                  .max_recv_sge = 1,
 882                                                  .pd = priv->pd,
 883                                                  .cq = rte_flow->cq,
 884                                                  });
 885         } else {
 886                 rxq = container_of((*priv->rxqs)[action->queue_id],
 887                                    struct rxq_ctrl, rxq);
 888                 rte_flow->rxq = &rxq->rxq;
 889                 rxq->rxq.mark |= action->mark;
 890                 rte_flow->wq = rxq->wq;
 891         }
 892         rte_flow->mark = action->mark;
 893         rte_flow->ibv_attr = ibv_attr;
 894         rte_flow->ind_table = ibv_exp_create_rwq_ind_table(
 895                 priv->ctx,
 896                 &(struct ibv_exp_rwq_ind_table_init_attr){
 897                         .pd = priv->pd,
 898                         .log_ind_tbl_size = 0,
 899                         .ind_tbl = &rte_flow->wq,
 900                         .comp_mask = 0,
 901                 });
 902         if (!rte_flow->ind_table) {
 903                 rte_flow_error_set(error, ENOMEM, RTE_FLOW_ERROR_TYPE_HANDLE,
 904                                    NULL, "cannot allocate indirection table");
 905                 goto error;
 906         }
 907         rte_flow->qp = ibv_exp_create_qp(
 908                 priv->ctx,
 909                 &(struct ibv_exp_qp_init_attr){
 910                         .qp_type = IBV_QPT_RAW_PACKET,
 911                         .comp_mask =
 912                                 IBV_EXP_QP_INIT_ATTR_PD |
 913                                 IBV_EXP_QP_INIT_ATTR_PORT |
 914                                 IBV_EXP_QP_INIT_ATTR_RX_HASH,
 915                         .pd = priv->pd,
 916                         .rx_hash_conf = &(struct ibv_exp_rx_hash_conf){
 917                                 .rx_hash_function =
 918                                         IBV_EXP_RX_HASH_FUNC_TOEPLITZ,
 919                                 .rx_hash_key_len = rss_hash_default_key_len,
 920                                 .rx_hash_key = rss_hash_default_key,
 921                                 .rx_hash_fields_mask = 0,
 922                                 .rwq_ind_tbl = rte_flow->ind_table,
 923                         },
 924                         .port_num = priv->port,
 925                 });
 926         if (!rte_flow->qp) {
 927                 rte_flow_error_set(error, ENOMEM, RTE_FLOW_ERROR_TYPE_HANDLE,
 928                                    NULL, "cannot allocate QP");
 929                 goto error;
 930         }
 931         rte_flow->ibv_flow = ibv_exp_create_flow(rte_flow->qp,
 932                                                  rte_flow->ibv_attr);
 933         if (!rte_flow->ibv_flow) {
 934                 rte_flow_error_set(error, ENOMEM, RTE_FLOW_ERROR_TYPE_HANDLE,
 935                                    NULL, "flow rule creation failure");
 936                 goto error;
 937         }
 938         return rte_flow;
 939 error:
 940         assert(rte_flow);
 941         if (rte_flow->qp)
 942                 ibv_destroy_qp(rte_flow->qp);
 943         if (rte_flow->ind_table)
 944                 ibv_exp_destroy_rwq_ind_table(rte_flow->ind_table);
 945         if (!rte_flow->rxq && rte_flow->wq)
 946                 ibv_exp_destroy_wq(rte_flow->wq);
 947         if (!rte_flow->rxq && rte_flow->cq)
 948                 ibv_destroy_cq(rte_flow->cq);
 949         rte_free(rte_flow->ibv_attr);
 950         rte_free(rte_flow);
 951         return NULL;
 952 }
 953
 954 /**
 955  * Convert a flow.
 956  *
 957  * @param priv
 958  *   Pointer to private structure.
 959  * @param[in] attr
 960  *   Flow rule attributes.
 961  * @param[in] pattern
 962  *   Pattern specification (list terminated by the END pattern item).
 963  * @param[in] actions
 964  *   Associated actions (list terminated by the END action).
 965  * @param[out] error
 966  *   Perform verbose error reporting if not NULL.
 967  *
 968  * @return
 969  *   A flow on success, NULL otherwise.
 970  */
 971 static struct rte_flow *
 972 priv_flow_create(struct priv *priv,
 973                  const struct rte_flow_attr *attr,
 974                  const struct rte_flow_item items[],
 975                  const struct rte_flow_action actions[],
 976                  struct rte_flow_error *error)
 977 {
 978         struct rte_flow *rte_flow;
 979         struct mlx5_flow_action action;
 980         struct mlx5_flow flow = { .offset = sizeof(struct ibv_exp_flow_attr), };
 981         int err;
 982
 983         err = priv_flow_validate(priv, attr, items, actions, error, &flow);
 984         if (err)
 985                 goto exit;
 986         flow.ibv_attr = rte_malloc(__func__, flow.offset, 0);
 987         flow.offset = sizeof(struct ibv_exp_flow_attr);
 988         if (!flow.ibv_attr) {
 989                 rte_flow_error_set(error, ENOMEM, RTE_FLOW_ERROR_TYPE_HANDLE,
 990                                    NULL, "cannot allocate ibv_attr memory");
 991                 goto exit;
 992         }
 993         *flow.ibv_attr = (struct ibv_exp_flow_attr){
 994                 .type = IBV_EXP_FLOW_ATTR_NORMAL,
 995                 .size = sizeof(struct ibv_exp_flow_attr),
 996                 .priority = attr->priority,
 997                 .num_of_specs = 0,
 998                 .port = 0,
 999                 .flags = 0,
1000                 .reserved = 0,
1001         };
1002         flow.inner = 0;
1003         claim_zero(priv_flow_validate(priv, attr, items, actions,
1004                                       error, &flow));
1005         action = (struct mlx5_flow_action){
1006                 .queue = 0,
1007                 .drop = 0,
1008                 .mark = 0,
1009                 .mark_id = MLX5_FLOW_MARK_DEFAULT,
1010         };
1011         for (; actions->type != RTE_FLOW_ACTION_TYPE_END; ++actions) {
1012                 if (actions->type == RTE_FLOW_ACTION_TYPE_VOID) {
1013                         continue;
1014                 } else if (actions->type == RTE_FLOW_ACTION_TYPE_QUEUE) {
1015                         action.queue = 1;
1016                         action.queue_id =
1017                                 ((const struct rte_flow_action_queue *)
1018                                  actions->conf)->index;
1019                 } else if (actions->type == RTE_FLOW_ACTION_TYPE_DROP) {
1020                         action.drop = 1;
1021                 } else if (actions->type == RTE_FLOW_ACTION_TYPE_MARK) {
1022                         const struct rte_flow_action_mark *mark =
1023                                 (const struct rte_flow_action_mark *)
1024                                 actions->conf;
1025
1026                         if (mark)
1027                                 action.mark_id = mark->id;
1028                         action.mark = 1;
1029                 } else {
1030                         rte_flow_error_set(error, ENOTSUP,
1031                                            RTE_FLOW_ERROR_TYPE_ACTION,
1032                                            actions, "unsupported action");
1033                         goto exit;
1034                 }
1035         }
1036         if (action.mark) {
1037                 mlx5_flow_create_flag_mark(&flow, action.mark_id);
1038                 flow.offset += sizeof(struct ibv_exp_flow_spec_action_tag);
1039         }
1040         rte_flow = priv_flow_create_action_queue(priv, flow.ibv_attr,
1041                                                  &action, error);
1042         return rte_flow;
1043 exit:
1044         rte_free(flow.ibv_attr);
1045         return NULL;
1046 }
1047
1048 /**
1049  * Create a flow.
1050  *
1051  * @see rte_flow_create()
1052  * @see rte_flow_ops
1053  */
1054 struct rte_flow *
1055 mlx5_flow_create(struct rte_eth_dev *dev,
1056                  const struct rte_flow_attr *attr,
1057                  const struct rte_flow_item items[],
1058                  const struct rte_flow_action actions[],
1059                  struct rte_flow_error *error)
1060 {
1061         struct priv *priv = dev->data->dev_private;
1062         struct rte_flow *flow;
1063
1064         priv_lock(priv);
1065         flow = priv_flow_create(priv, attr, items, actions, error);
1066         if (flow) {
1067                 LIST_INSERT_HEAD(&priv->flows, flow, next);
1068                 DEBUG("Flow created %p", (void *)flow);
1069         }
1070         priv_unlock(priv);
1071         return flow;
1072 }
1073
1074 /**
1075  * Destroy a flow.
1076  *
1077  * @param priv
1078  *   Pointer to private structure.
1079  * @param[in] flow
1080  *   Flow to destroy.
1081  */
1082 static void
1083 priv_flow_destroy(struct priv *priv,
1084                   struct rte_flow *flow)
1085 {
1086         (void)priv;
1087         LIST_REMOVE(flow, next);
1088         if (flow->ibv_flow)
1089                 claim_zero(ibv_exp_destroy_flow(flow->ibv_flow));
1090         if (flow->qp)
1091                 claim_zero(ibv_destroy_qp(flow->qp));
1092         if (flow->ind_table)
1093                 claim_zero(ibv_exp_destroy_rwq_ind_table(flow->ind_table));
1094         if (!flow->rxq && flow->wq)
1095                 claim_zero(ibv_exp_destroy_wq(flow->wq));
1096         if (!flow->rxq && flow->cq)
1097                 claim_zero(ibv_destroy_cq(flow->cq));
1098         if (flow->mark) {
1099                 struct rte_flow *tmp;
1100                 uint32_t mark_n = 0;
1101
1102                 for (tmp = LIST_FIRST(&priv->flows);
1103                      tmp;
1104                      tmp = LIST_NEXT(tmp, next)) {
1105                         if ((flow->rxq == tmp->rxq) && tmp->mark)
1106                                 ++mark_n;
1107                 }
1108                 flow->rxq->mark = !!mark_n;
1109         }
1110         rte_free(flow->ibv_attr);
1111         DEBUG("Flow destroyed %p", (void *)flow);
1112         rte_free(flow);
1113 }
1114
1115 /**
1116  * Destroy a flow.
1117  *
1118  * @see rte_flow_destroy()
1119  * @see rte_flow_ops
1120  */
1121 int
1122 mlx5_flow_destroy(struct rte_eth_dev *dev,
1123                   struct rte_flow *flow,
1124                   struct rte_flow_error *error)
1125 {
1126         struct priv *priv = dev->data->dev_private;
1127
1128         (void)error;
1129         priv_lock(priv);
1130         priv_flow_destroy(priv, flow);
1131         priv_unlock(priv);
1132         return 0;
1133 }
1134
1135 /**
1136  * Destroy all flows.
1137  *
1138  * @param priv
1139  *   Pointer to private structure.
1140  */
1141 static void
1142 priv_flow_flush(struct priv *priv)
1143 {
1144         while (!LIST_EMPTY(&priv->flows)) {
1145                 struct rte_flow *flow;
1146
1147                 flow = LIST_FIRST(&priv->flows);
1148                 priv_flow_destroy(priv, flow);
1149         }
1150 }
1151
1152 /**
1153  * Destroy all flows.
1154  *
1155  * @see rte_flow_flush()
1156  * @see rte_flow_ops
1157  */
1158 int
1159 mlx5_flow_flush(struct rte_eth_dev *dev,
1160                 struct rte_flow_error *error)
1161 {
1162         struct priv *priv = dev->data->dev_private;
1163
1164         (void)error;
1165         priv_lock(priv);
1166         priv_flow_flush(priv);
1167         priv_unlock(priv);
1168         return 0;
1169 }
1170
1171 /**
1172  * Remove all flows.
1173  *
1174  * Called by dev_stop() to remove all flows.
1175  *
1176  * @param priv
1177  *   Pointer to private structure.
1178  */
1179 void
1180 priv_flow_stop(struct priv *priv)
1181 {
1182         struct rte_flow *flow;
1183
1184         for (flow = LIST_FIRST(&priv->flows);
1185              flow;
1186              flow = LIST_NEXT(flow, next)) {
1187                 claim_zero(ibv_exp_destroy_flow(flow->ibv_flow));
1188                 flow->ibv_flow = NULL;
1189                 if (flow->mark)
1190                         flow->rxq->mark = 0;
1191                 DEBUG("Flow %p removed", (void *)flow);
1192         }
1193 }
1194
1195 /**
1196  * Add all flows.
1197  *
1198  * @param priv
1199  *   Pointer to private structure.
1200  *
1201  * @return
1202  *   0 on success, a errno value otherwise and rte_errno is set.
1203  */
1204 int
1205 priv_flow_start(struct priv *priv)
1206 {
1207         struct rte_flow *flow;
1208
1209         for (flow = LIST_FIRST(&priv->flows);
1210              flow;
1211              flow = LIST_NEXT(flow, next)) {
1212                 flow->ibv_flow = ibv_exp_create_flow(flow->qp,
1213                                                      flow->ibv_attr);
1214                 if (!flow->ibv_flow) {
1215                         DEBUG("Flow %p cannot be applied", (void *)flow);
1216                         rte_errno = EINVAL;
1217                         return rte_errno;
1218                 }
1219                 DEBUG("Flow %p applied", (void *)flow);
1220                 if (flow->rxq)
1221                         flow->rxq->mark |= flow->mark;
1222         }
1223         return 0;
1224 }