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         /**
 115          * Default bit-masks to use when item->mask is not provided. When
 116          * \default_mask is also NULL, the full supported bit-mask (\mask) is
 117          * used instead.
 118          */
 119         const void *default_mask;
 120         /** Bit-masks size in bytes. */
 121         const unsigned int mask_sz;
 122         /**
 123          * Conversion function from rte_flow to NIC specific flow.
 124          *
 125          * @param item
 126          *   rte_flow item to convert.
 127          * @param default_mask
 128          *   Default bit-masks to use when item->mask is not provided.
 129          * @param data
 130          *   Internal structure to store the conversion.
 131          *
 132          * @return
 133          *   0 on success, negative value otherwise.
 134          */
 135         int (*convert)(const struct rte_flow_item *item,
 136                        const void *default_mask,
 137                        void *data);
 138         /** Size in bytes of the destination structure. */
 139         const unsigned int dst_sz;
 140         /** List of possible following items.  */
 141         const enum rte_flow_item_type *const items;
 142 };
 143
 144 /** Valid action for this PMD. */
 145 static const enum rte_flow_action_type valid_actions[] = {
 146         RTE_FLOW_ACTION_TYPE_DROP,
 147         RTE_FLOW_ACTION_TYPE_QUEUE,
 148         RTE_FLOW_ACTION_TYPE_MARK,
 149         RTE_FLOW_ACTION_TYPE_END,
 150 };
 151
 152 /** Graph of supported items and associated actions. */
 153 static const struct mlx5_flow_items mlx5_flow_items[] = {
 154         [RTE_FLOW_ITEM_TYPE_END] = {
 155                 .items = ITEMS(RTE_FLOW_ITEM_TYPE_ETH,
 156                                RTE_FLOW_ITEM_TYPE_VXLAN),
 157         },
 158         [RTE_FLOW_ITEM_TYPE_ETH] = {
 159                 .items = ITEMS(RTE_FLOW_ITEM_TYPE_VLAN,
 160                                RTE_FLOW_ITEM_TYPE_IPV4,
 161                                RTE_FLOW_ITEM_TYPE_IPV6),
 162                 .actions = valid_actions,
 163                 .mask = &(const struct rte_flow_item_eth){
 164                         .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 165                         .src.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 166                 },
 167                 .mask_sz = sizeof(struct rte_flow_item_eth),
 168                 .convert = mlx5_flow_create_eth,
 169                 .dst_sz = sizeof(struct ibv_exp_flow_spec_eth),
 170         },
 171         [RTE_FLOW_ITEM_TYPE_VLAN] = {
 172                 .items = ITEMS(RTE_FLOW_ITEM_TYPE_IPV4,
 173                                RTE_FLOW_ITEM_TYPE_IPV6),
 174                 .actions = valid_actions,
 175                 .mask = &(const struct rte_flow_item_vlan){
 176                         .tci = -1,
 177                 },
 178                 .mask_sz = sizeof(struct rte_flow_item_vlan),
 179                 .convert = mlx5_flow_create_vlan,
 180                 .dst_sz = 0,
 181         },
 182         [RTE_FLOW_ITEM_TYPE_IPV4] = {
 183                 .items = ITEMS(RTE_FLOW_ITEM_TYPE_UDP,
 184                                RTE_FLOW_ITEM_TYPE_TCP),
 185                 .actions = valid_actions,
 186                 .mask = &(const struct rte_flow_item_ipv4){
 187                         .hdr = {
 188                                 .src_addr = -1,
 189                                 .dst_addr = -1,
 190                                 .type_of_service = -1,
 191                                 .next_proto_id = -1,
 192                         },
 193                 },
 194                 .default_mask = &(const struct rte_flow_item_ipv4){
 195                         .hdr = {
 196                                 .src_addr = -1,
 197                                 .dst_addr = -1,
 198                         },
 199                 },
 200                 .mask_sz = sizeof(struct rte_flow_item_ipv4),
 201                 .convert = mlx5_flow_create_ipv4,
 202                 .dst_sz = sizeof(struct ibv_exp_flow_spec_ipv4_ext),
 203         },
 204         [RTE_FLOW_ITEM_TYPE_IPV6] = {
 205                 .items = ITEMS(RTE_FLOW_ITEM_TYPE_UDP,
 206                                RTE_FLOW_ITEM_TYPE_TCP),
 207                 .actions = valid_actions,
 208                 .mask = &(const struct rte_flow_item_ipv6){
 209                         .hdr = {
 210                                 .src_addr = {
 211                                         0xff, 0xff, 0xff, 0xff,
 212                                         0xff, 0xff, 0xff, 0xff,
 213                                         0xff, 0xff, 0xff, 0xff,
 214                                         0xff, 0xff, 0xff, 0xff,
 215                                 },
 216                                 .dst_addr = {
 217                                         0xff, 0xff, 0xff, 0xff,
 218                                         0xff, 0xff, 0xff, 0xff,
 219                                         0xff, 0xff, 0xff, 0xff,
 220                                         0xff, 0xff, 0xff, 0xff,
 221                                 },
 222                         },
 223                 },
 224                 .mask_sz = sizeof(struct rte_flow_item_ipv6),
 225                 .convert = mlx5_flow_create_ipv6,
 226                 .dst_sz = sizeof(struct ibv_exp_flow_spec_ipv6),
 227         },
 228         [RTE_FLOW_ITEM_TYPE_UDP] = {
 229                 .items = ITEMS(RTE_FLOW_ITEM_TYPE_VXLAN),
 230                 .actions = valid_actions,
 231                 .mask = &(const struct rte_flow_item_udp){
 232                         .hdr = {
 233                                 .src_port = -1,
 234                                 .dst_port = -1,
 235                         },
 236                 },
 237                 .mask_sz = sizeof(struct rte_flow_item_udp),
 238                 .convert = mlx5_flow_create_udp,
 239                 .dst_sz = sizeof(struct ibv_exp_flow_spec_tcp_udp),
 240         },
 241         [RTE_FLOW_ITEM_TYPE_TCP] = {
 242                 .actions = valid_actions,
 243                 .mask = &(const struct rte_flow_item_tcp){
 244                         .hdr = {
 245                                 .src_port = -1,
 246                                 .dst_port = -1,
 247                         },
 248                 },
 249                 .mask_sz = sizeof(struct rte_flow_item_tcp),
 250                 .convert = mlx5_flow_create_tcp,
 251                 .dst_sz = sizeof(struct ibv_exp_flow_spec_tcp_udp),
 252         },
 253         [RTE_FLOW_ITEM_TYPE_VXLAN] = {
 254                 .items = ITEMS(RTE_FLOW_ITEM_TYPE_ETH),
 255                 .actions = valid_actions,
 256                 .mask = &(const struct rte_flow_item_vxlan){
 257                         .vni = "\xff\xff\xff",
 258                 },
 259                 .mask_sz = sizeof(struct rte_flow_item_vxlan),
 260                 .convert = mlx5_flow_create_vxlan,
 261                 .dst_sz = sizeof(struct ibv_exp_flow_spec_tunnel),
 262         },
 263 };
 264
 265 /** Structure to pass to the conversion function. */
 266 struct mlx5_flow {
 267         struct ibv_exp_flow_attr *ibv_attr; /**< Verbs attribute. */
 268         unsigned int offset; /**< Offset in bytes in the ibv_attr buffer. */
 269         uint32_t inner; /**< Set once VXLAN is encountered. */
 270 };
 271
 272 struct mlx5_flow_action {
 273         uint32_t queue:1; /**< Target is a receive queue. */
 274         uint32_t drop:1; /**< Target is a drop queue. */
 275         uint32_t mark:1; /**< Mark is present in the flow. */
 276         uint32_t queue_id; /**< Identifier of the queue. */
 277         uint32_t mark_id; /**< Mark identifier. */
 278 };
 279
 280 /**
 281  * Check support for a given item.
 282  *
 283  * @param item[in]
 284  *   Item specification.
 285  * @param mask[in]
 286  *   Bit-masks covering supported fields to compare with spec, last and mask in
 287  *   \item.
 288  * @param size
 289  *   Bit-Mask size in bytes.
 290  *
 291  * @return
 292  *   0 on success.
 293  */
 294 static int
 295 mlx5_flow_item_validate(const struct rte_flow_item *item,
 296                         const uint8_t *mask, unsigned int size)
 297 {
 298         int ret = 0;
 299
 300         if (!item->spec && (item->mask || item->last))
 301                 return -1;
 302         if (item->spec && !item->mask) {
 303                 unsigned int i;
 304                 const uint8_t *spec = item->spec;
 305
 306                 for (i = 0; i < size; ++i)
 307                         if ((spec[i] | mask[i]) != mask[i])
 308                                 return -1;
 309         }
 310         if (item->last && !item->mask) {
 311                 unsigned int i;
 312                 const uint8_t *spec = item->last;
 313
 314                 for (i = 0; i < size; ++i)
 315                         if ((spec[i] | mask[i]) != mask[i])
 316                                 return -1;
 317         }
 318         if (item->mask) {
 319                 unsigned int i;
 320                 const uint8_t *spec = item->mask;
 321
 322                 for (i = 0; i < size; ++i)
 323                         if ((spec[i] | mask[i]) != mask[i])
 324                                 return -1;
 325         }
 326         if (item->spec && item->last) {
 327                 uint8_t spec[size];
 328                 uint8_t last[size];
 329                 const uint8_t *apply = mask;
 330                 unsigned int i;
 331
 332                 if (item->mask)
 333                         apply = item->mask;
 334                 for (i = 0; i < size; ++i) {
 335                         spec[i] = ((const uint8_t *)item->spec)[i] & apply[i];
 336                         last[i] = ((const uint8_t *)item->last)[i] & apply[i];
 337                 }
 338                 ret = memcmp(spec, last, size);
 339         }
 340         return ret;
 341 }
 342
 343 /**
 344  * Validate a flow supported by the NIC.
 345  *
 346  * @param priv
 347  *   Pointer to private structure.
 348  * @param[in] attr
 349  *   Flow rule attributes.
 350  * @param[in] pattern
 351  *   Pattern specification (list terminated by the END pattern item).
 352  * @param[in] actions
 353  *   Associated actions (list terminated by the END action).
 354  * @param[out] error
 355  *   Perform verbose error reporting if not NULL.
 356  * @param[in, out] flow
 357  *   Flow structure to update.
 358  *
 359  * @return
 360  *   0 on success, a negative errno value otherwise and rte_errno is set.
 361  */
 362 static int
 363 priv_flow_validate(struct priv *priv,
 364                    const struct rte_flow_attr *attr,
 365                    const struct rte_flow_item items[],
 366                    const struct rte_flow_action actions[],
 367                    struct rte_flow_error *error,
 368                    struct mlx5_flow *flow)
 369 {
 370         const struct mlx5_flow_items *cur_item = mlx5_flow_items;
 371         struct mlx5_flow_action action = {
 372                 .queue = 0,
 373                 .drop = 0,
 374                 .mark = 0,
 375         };
 376
 377         (void)priv;
 378         if (attr->group) {
 379                 rte_flow_error_set(error, ENOTSUP,
 380                                    RTE_FLOW_ERROR_TYPE_ATTR_GROUP,
 381                                    NULL,
 382                                    "groups are not supported");
 383                 return -rte_errno;
 384         }
 385         if (attr->priority) {
 386                 rte_flow_error_set(error, ENOTSUP,
 387                                    RTE_FLOW_ERROR_TYPE_ATTR_PRIORITY,
 388                                    NULL,
 389                                    "priorities are not supported");
 390                 return -rte_errno;
 391         }
 392         if (attr->egress) {
 393                 rte_flow_error_set(error, ENOTSUP,
 394                                    RTE_FLOW_ERROR_TYPE_ATTR_EGRESS,
 395                                    NULL,
 396                                    "egress is not supported");
 397                 return -rte_errno;
 398         }
 399         if (!attr->ingress) {
 400                 rte_flow_error_set(error, ENOTSUP,
 401                                    RTE_FLOW_ERROR_TYPE_ATTR_INGRESS,
 402                                    NULL,
 403                                    "only ingress is supported");
 404                 return -rte_errno;
 405         }
 406         for (; items->type != RTE_FLOW_ITEM_TYPE_END; ++items) {
 407                 const struct mlx5_flow_items *token = NULL;
 408                 unsigned int i;
 409                 int err;
 410
 411                 if (items->type == RTE_FLOW_ITEM_TYPE_VOID)
 412                         continue;
 413                 /* Handle special situation for VLAN. */
 414                 if (items->type == RTE_FLOW_ITEM_TYPE_VLAN) {
 415                         if (((const struct rte_flow_item_vlan *)items)->tci >
 416                             ETHER_MAX_VLAN_ID) {
 417                                 rte_flow_error_set(error, ENOTSUP,
 418                                                    RTE_FLOW_ERROR_TYPE_ITEM,
 419                                                    items,
 420                                                    "wrong VLAN id value");
 421                                 return -rte_errno;
 422                         }
 423                 }
 424                 for (i = 0;
 425                      cur_item->items &&
 426                      cur_item->items[i] != RTE_FLOW_ITEM_TYPE_END;
 427                      ++i) {
 428                         if (cur_item->items[i] == items->type) {
 429                                 token = &mlx5_flow_items[items->type];
 430                                 break;
 431                         }
 432                 }
 433                 if (!token)
 434                         goto exit_item_not_supported;
 435                 cur_item = token;
 436                 err = mlx5_flow_item_validate(items,
 437                                               (const uint8_t *)cur_item->mask,
 438                                               sizeof(cur_item->mask_sz));
 439                 if (err)
 440                         goto exit_item_not_supported;
 441                 if (flow->ibv_attr && cur_item->convert) {
 442                         err = cur_item->convert(items,
 443                                                 (cur_item->default_mask ?
 444                                                  cur_item->default_mask :
 445                                                  cur_item->mask),
 446                                                 flow);
 447                         if (err)
 448                                 goto exit_item_not_supported;
 449                 }
 450                 flow->offset += cur_item->dst_sz;
 451         }
 452         for (; actions->type != RTE_FLOW_ACTION_TYPE_END; ++actions) {
 453                 if (actions->type == RTE_FLOW_ACTION_TYPE_VOID) {
 454                         continue;
 455                 } else if (actions->type == RTE_FLOW_ACTION_TYPE_DROP) {
 456                         action.drop = 1;
 457                 } else if (actions->type == RTE_FLOW_ACTION_TYPE_QUEUE) {
 458                         const struct rte_flow_action_queue *queue =
 459                                 (const struct rte_flow_action_queue *)
 460                                 actions->conf;
 461
 462                         if (!queue || (queue->index > (priv->rxqs_n - 1)))
 463                                 goto exit_action_not_supported;
 464                         action.queue = 1;
 465                 } else if (actions->type == RTE_FLOW_ACTION_TYPE_MARK) {
 466                         const struct rte_flow_action_mark *mark =
 467                                 (const struct rte_flow_action_mark *)
 468                                 actions->conf;
 469
 470                         if (mark && (mark->id >= MLX5_FLOW_MARK_MAX)) {
 471                                 rte_flow_error_set(error, ENOTSUP,
 472                                                    RTE_FLOW_ERROR_TYPE_ACTION,
 473                                                    actions,
 474                                                    "mark must be between 0"
 475                                                    " and 16777199");
 476                                 return -rte_errno;
 477                         }
 478                         action.mark = 1;
 479                 } else {
 480                         goto exit_action_not_supported;
 481                 }
 482         }
 483         if (action.mark && !flow->ibv_attr && !action.drop)
 484                 flow->offset += sizeof(struct ibv_exp_flow_spec_action_tag);
 485         if (!action.queue && !action.drop) {
 486                 rte_flow_error_set(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_HANDLE,
 487                                    NULL, "no valid action");
 488                 return -rte_errno;
 489         }
 490         return 0;
 491 exit_item_not_supported:
 492         rte_flow_error_set(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ITEM,
 493                            items, "item not supported");
 494         return -rte_errno;
 495 exit_action_not_supported:
 496         rte_flow_error_set(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ACTION,
 497                            actions, "action not supported");
 498         return -rte_errno;
 499 }
 500
 501 /**
 502  * Validate a flow supported by the NIC.
 503  *
 504  * @see rte_flow_validate()
 505  * @see rte_flow_ops
 506  */
 507 int
 508 mlx5_flow_validate(struct rte_eth_dev *dev,
 509                    const struct rte_flow_attr *attr,
 510                    const struct rte_flow_item items[],
 511                    const struct rte_flow_action actions[],
 512                    struct rte_flow_error *error)
 513 {
 514         struct priv *priv = dev->data->dev_private;
 515         int ret;
 516         struct mlx5_flow flow = { .offset = sizeof(struct ibv_exp_flow_attr) };
 517
 518         priv_lock(priv);
 519         ret = priv_flow_validate(priv, attr, items, actions, error, &flow);
 520         priv_unlock(priv);
 521         return ret;
 522 }
 523
 524 /**
 525  * Convert Ethernet item to Verbs specification.
 526  *
 527  * @param item[in]
 528  *   Item specification.
 529  * @param default_mask[in]
 530  *   Default bit-masks to use when item->mask is not provided.
 531  * @param data[in, out]
 532  *   User structure.
 533  */
 534 static int
 535 mlx5_flow_create_eth(const struct rte_flow_item *item,
 536                      const void *default_mask,
 537                      void *data)
 538 {
 539         const struct rte_flow_item_eth *spec = item->spec;
 540         const struct rte_flow_item_eth *mask = item->mask;
 541         struct mlx5_flow *flow = (struct mlx5_flow *)data;
 542         struct ibv_exp_flow_spec_eth *eth;
 543         const unsigned int eth_size = sizeof(struct ibv_exp_flow_spec_eth);
 544         unsigned int i;
 545
 546         ++flow->ibv_attr->num_of_specs;
 547         flow->ibv_attr->priority = 2;
 548         eth = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
 549         *eth = (struct ibv_exp_flow_spec_eth) {
 550                 .type = flow->inner | IBV_EXP_FLOW_SPEC_ETH,
 551                 .size = eth_size,
 552         };
 553         if (!spec)
 554                 return 0;
 555         if (!mask)
 556                 mask = default_mask;
 557         memcpy(eth->val.dst_mac, spec->dst.addr_bytes, ETHER_ADDR_LEN);
 558         memcpy(eth->val.src_mac, spec->src.addr_bytes, ETHER_ADDR_LEN);
 559         memcpy(eth->mask.dst_mac, mask->dst.addr_bytes, ETHER_ADDR_LEN);
 560         memcpy(eth->mask.src_mac, mask->src.addr_bytes, ETHER_ADDR_LEN);
 561         /* Remove unwanted bits from values. */
 562         for (i = 0; i < ETHER_ADDR_LEN; ++i) {
 563                 eth->val.dst_mac[i] &= eth->mask.dst_mac[i];
 564                 eth->val.src_mac[i] &= eth->mask.src_mac[i];
 565         }
 566         return 0;
 567 }
 568
 569 /**
 570  * Convert VLAN item to Verbs specification.
 571  *
 572  * @param item[in]
 573  *   Item specification.
 574  * @param default_mask[in]
 575  *   Default bit-masks to use when item->mask is not provided.
 576  * @param data[in, out]
 577  *   User structure.
 578  */
 579 static int
 580 mlx5_flow_create_vlan(const struct rte_flow_item *item,
 581                       const void *default_mask,
 582                       void *data)
 583 {
 584         const struct rte_flow_item_vlan *spec = item->spec;
 585         const struct rte_flow_item_vlan *mask = item->mask;
 586         struct mlx5_flow *flow = (struct mlx5_flow *)data;
 587         struct ibv_exp_flow_spec_eth *eth;
 588         const unsigned int eth_size = sizeof(struct ibv_exp_flow_spec_eth);
 589
 590         eth = (void *)((uintptr_t)flow->ibv_attr + flow->offset - eth_size);
 591         if (!spec)
 592                 return 0;
 593         if (!mask)
 594                 mask = default_mask;
 595         eth->val.vlan_tag = spec->tci;
 596         eth->mask.vlan_tag = mask->tci;
 597         eth->val.vlan_tag &= eth->mask.vlan_tag;
 598         return 0;
 599 }
 600
 601 /**
 602  * Convert IPv4 item to Verbs specification.
 603  *
 604  * @param item[in]
 605  *   Item specification.
 606  * @param default_mask[in]
 607  *   Default bit-masks to use when item->mask is not provided.
 608  * @param data[in, out]
 609  *   User structure.
 610  */
 611 static int
 612 mlx5_flow_create_ipv4(const struct rte_flow_item *item,
 613                       const void *default_mask,
 614                       void *data)
 615 {
 616         const struct rte_flow_item_ipv4 *spec = item->spec;
 617         const struct rte_flow_item_ipv4 *mask = item->mask;
 618         struct mlx5_flow *flow = (struct mlx5_flow *)data;
 619         struct ibv_exp_flow_spec_ipv4_ext *ipv4;
 620         unsigned int ipv4_size = sizeof(struct ibv_exp_flow_spec_ipv4_ext);
 621
 622         ++flow->ibv_attr->num_of_specs;
 623         flow->ibv_attr->priority = 1;
 624         ipv4 = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
 625         *ipv4 = (struct ibv_exp_flow_spec_ipv4_ext) {
 626                 .type = flow->inner | IBV_EXP_FLOW_SPEC_IPV4_EXT,
 627                 .size = ipv4_size,
 628         };
 629         if (!spec)
 630                 return 0;
 631         if (!mask)
 632                 mask = default_mask;
 633         ipv4->val = (struct ibv_exp_flow_ipv4_ext_filter){
 634                 .src_ip = spec->hdr.src_addr,
 635                 .dst_ip = spec->hdr.dst_addr,
 636                 .proto = spec->hdr.next_proto_id,
 637                 .tos = spec->hdr.type_of_service,
 638         };
 639         ipv4->mask = (struct ibv_exp_flow_ipv4_ext_filter){
 640                 .src_ip = mask->hdr.src_addr,
 641                 .dst_ip = mask->hdr.dst_addr,
 642                 .proto = mask->hdr.next_proto_id,
 643                 .tos = mask->hdr.type_of_service,
 644         };
 645         /* Remove unwanted bits from values. */
 646         ipv4->val.src_ip &= ipv4->mask.src_ip;
 647         ipv4->val.dst_ip &= ipv4->mask.dst_ip;
 648         ipv4->val.proto &= ipv4->mask.proto;
 649         ipv4->val.tos &= ipv4->mask.tos;
 650         return 0;
 651 }
 652
 653 /**
 654  * Convert IPv6 item to Verbs specification.
 655  *
 656  * @param item[in]
 657  *   Item specification.
 658  * @param default_mask[in]
 659  *   Default bit-masks to use when item->mask is not provided.
 660  * @param data[in, out]
 661  *   User structure.
 662  */
 663 static int
 664 mlx5_flow_create_ipv6(const struct rte_flow_item *item,
 665                       const void *default_mask,
 666                       void *data)
 667 {
 668         const struct rte_flow_item_ipv6 *spec = item->spec;
 669         const struct rte_flow_item_ipv6 *mask = item->mask;
 670         struct mlx5_flow *flow = (struct mlx5_flow *)data;
 671         struct ibv_exp_flow_spec_ipv6 *ipv6;
 672         unsigned int ipv6_size = sizeof(struct ibv_exp_flow_spec_ipv6);
 673         unsigned int i;
 674
 675         ++flow->ibv_attr->num_of_specs;
 676         flow->ibv_attr->priority = 1;
 677         ipv6 = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
 678         *ipv6 = (struct ibv_exp_flow_spec_ipv6) {
 679                 .type = flow->inner | IBV_EXP_FLOW_SPEC_IPV6,
 680                 .size = ipv6_size,
 681         };
 682         if (!spec)
 683                 return 0;
 684         if (!mask)
 685                 mask = default_mask;
 686         memcpy(ipv6->val.src_ip, spec->hdr.src_addr,
 687                RTE_DIM(ipv6->val.src_ip));
 688         memcpy(ipv6->val.dst_ip, spec->hdr.dst_addr,
 689                RTE_DIM(ipv6->val.dst_ip));
 690         memcpy(ipv6->mask.src_ip, mask->hdr.src_addr,
 691                RTE_DIM(ipv6->mask.src_ip));
 692         memcpy(ipv6->mask.dst_ip, mask->hdr.dst_addr,
 693                RTE_DIM(ipv6->mask.dst_ip));
 694         /* Remove unwanted bits from values. */
 695         for (i = 0; i < RTE_DIM(ipv6->val.src_ip); ++i) {
 696                 ipv6->val.src_ip[i] &= ipv6->mask.src_ip[i];
 697                 ipv6->val.dst_ip[i] &= ipv6->mask.dst_ip[i];
 698         }
 699         return 0;
 700 }
 701
 702 /**
 703  * Convert UDP item to Verbs specification.
 704  *
 705  * @param item[in]
 706  *   Item specification.
 707  * @param default_mask[in]
 708  *   Default bit-masks to use when item->mask is not provided.
 709  * @param data[in, out]
 710  *   User structure.
 711  */
 712 static int
 713 mlx5_flow_create_udp(const struct rte_flow_item *item,
 714                      const void *default_mask,
 715                      void *data)
 716 {
 717         const struct rte_flow_item_udp *spec = item->spec;
 718         const struct rte_flow_item_udp *mask = item->mask;
 719         struct mlx5_flow *flow = (struct mlx5_flow *)data;
 720         struct ibv_exp_flow_spec_tcp_udp *udp;
 721         unsigned int udp_size = sizeof(struct ibv_exp_flow_spec_tcp_udp);
 722
 723         ++flow->ibv_attr->num_of_specs;
 724         flow->ibv_attr->priority = 0;
 725         udp = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
 726         *udp = (struct ibv_exp_flow_spec_tcp_udp) {
 727                 .type = flow->inner | IBV_EXP_FLOW_SPEC_UDP,
 728                 .size = udp_size,
 729         };
 730         if (!spec)
 731                 return 0;
 732         if (!mask)
 733                 mask = default_mask;
 734         udp->val.dst_port = spec->hdr.dst_port;
 735         udp->val.src_port = spec->hdr.src_port;
 736         udp->mask.dst_port = mask->hdr.dst_port;
 737         udp->mask.src_port = mask->hdr.src_port;
 738         /* Remove unwanted bits from values. */
 739         udp->val.src_port &= udp->mask.src_port;
 740         udp->val.dst_port &= udp->mask.dst_port;
 741         return 0;
 742 }
 743
 744 /**
 745  * Convert TCP item to Verbs specification.
 746  *
 747  * @param item[in]
 748  *   Item specification.
 749  * @param default_mask[in]
 750  *   Default bit-masks to use when item->mask is not provided.
 751  * @param data[in, out]
 752  *   User structure.
 753  */
 754 static int
 755 mlx5_flow_create_tcp(const struct rte_flow_item *item,
 756                      const void *default_mask,
 757                      void *data)
 758 {
 759         const struct rte_flow_item_tcp *spec = item->spec;
 760         const struct rte_flow_item_tcp *mask = item->mask;
 761         struct mlx5_flow *flow = (struct mlx5_flow *)data;
 762         struct ibv_exp_flow_spec_tcp_udp *tcp;
 763         unsigned int tcp_size = sizeof(struct ibv_exp_flow_spec_tcp_udp);
 764
 765         ++flow->ibv_attr->num_of_specs;
 766         flow->ibv_attr->priority = 0;
 767         tcp = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
 768         *tcp = (struct ibv_exp_flow_spec_tcp_udp) {
 769                 .type = flow->inner | IBV_EXP_FLOW_SPEC_TCP,
 770                 .size = tcp_size,
 771         };
 772         if (!spec)
 773                 return 0;
 774         if (!mask)
 775                 mask = default_mask;
 776         tcp->val.dst_port = spec->hdr.dst_port;
 777         tcp->val.src_port = spec->hdr.src_port;
 778         tcp->mask.dst_port = mask->hdr.dst_port;
 779         tcp->mask.src_port = mask->hdr.src_port;
 780         /* Remove unwanted bits from values. */
 781         tcp->val.src_port &= tcp->mask.src_port;
 782         tcp->val.dst_port &= tcp->mask.dst_port;
 783         return 0;
 784 }
 785
 786 /**
 787  * Convert VXLAN item to Verbs specification.
 788  *
 789  * @param item[in]
 790  *   Item specification.
 791  * @param default_mask[in]
 792  *   Default bit-masks to use when item->mask is not provided.
 793  * @param data[in, out]
 794  *   User structure.
 795  */
 796 static int
 797 mlx5_flow_create_vxlan(const struct rte_flow_item *item,
 798                        const void *default_mask,
 799                        void *data)
 800 {
 801         const struct rte_flow_item_vxlan *spec = item->spec;
 802         const struct rte_flow_item_vxlan *mask = item->mask;
 803         struct mlx5_flow *flow = (struct mlx5_flow *)data;
 804         struct ibv_exp_flow_spec_tunnel *vxlan;
 805         unsigned int size = sizeof(struct ibv_exp_flow_spec_tunnel);
 806         union vni {
 807                 uint32_t vlan_id;
 808                 uint8_t vni[4];
 809         } id;
 810
 811         ++flow->ibv_attr->num_of_specs;
 812         flow->ibv_attr->priority = 0;
 813         id.vni[0] = 0;
 814         vxlan = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
 815         *vxlan = (struct ibv_exp_flow_spec_tunnel) {
 816                 .type = flow->inner | IBV_EXP_FLOW_SPEC_VXLAN_TUNNEL,
 817                 .size = size,
 818         };
 819         flow->inner = IBV_EXP_FLOW_SPEC_INNER;
 820         if (!spec)
 821                 return 0;
 822         if (!mask)
 823                 mask = default_mask;
 824         memcpy(&id.vni[1], spec->vni, 3);
 825         vxlan->val.tunnel_id = id.vlan_id;
 826         memcpy(&id.vni[1], mask->vni, 3);
 827         vxlan->mask.tunnel_id = id.vlan_id;
 828         /* Remove unwanted bits from values. */
 829         vxlan->val.tunnel_id &= vxlan->mask.tunnel_id;
 830         return 0;
 831 }
 832
 833 /**
 834  * Convert mark/flag action to Verbs specification.
 835  *
 836  * @param flow
 837  *   Pointer to MLX5 flow structure.
 838  * @param mark_id
 839  *   Mark identifier.
 840  */
 841 static int
 842 mlx5_flow_create_flag_mark(struct mlx5_flow *flow, uint32_t mark_id)
 843 {
 844         struct ibv_exp_flow_spec_action_tag *tag;
 845         unsigned int size = sizeof(struct ibv_exp_flow_spec_action_tag);
 846
 847         tag = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
 848         *tag = (struct ibv_exp_flow_spec_action_tag){
 849                 .type = IBV_EXP_FLOW_SPEC_ACTION_TAG,
 850                 .size = size,
 851                 .tag_id = mlx5_flow_mark_set(mark_id),
 852         };
 853         ++flow->ibv_attr->num_of_specs;
 854         return 0;
 855 }
 856
 857 /**
 858  * Complete flow rule creation.
 859  *
 860  * @param priv
 861  *   Pointer to private structure.
 862  * @param ibv_attr
 863  *   Verbs flow attributes.
 864  * @param action
 865  *   Target action structure.
 866  * @param[out] error
 867  *   Perform verbose error reporting if not NULL.
 868  *
 869  * @return
 870  *   A flow if the rule could be created.
 871  */
 872 static struct rte_flow *
 873 priv_flow_create_action_queue(struct priv *priv,
 874                               struct ibv_exp_flow_attr *ibv_attr,
 875                               struct mlx5_flow_action *action,
 876                               struct rte_flow_error *error)
 877 {
 878         struct rxq_ctrl *rxq;
 879         struct rte_flow *rte_flow;
 880
 881         assert(priv->pd);
 882         assert(priv->ctx);
 883         rte_flow = rte_calloc(__func__, 1, sizeof(*rte_flow), 0);
 884         if (!rte_flow) {
 885                 rte_flow_error_set(error, ENOMEM, RTE_FLOW_ERROR_TYPE_HANDLE,
 886                                    NULL, "cannot allocate flow memory");
 887                 return NULL;
 888         }
 889         if (action->drop) {
 890                 rte_flow->cq =
 891                         ibv_exp_create_cq(priv->ctx, 1, NULL, NULL, 0,
 892                                           &(struct ibv_exp_cq_init_attr){
 893                                                   .comp_mask = 0,
 894                                           });
 895                 if (!rte_flow->cq) {
 896                         rte_flow_error_set(error, ENOMEM,
 897                                            RTE_FLOW_ERROR_TYPE_HANDLE,
 898                                            NULL, "cannot allocate CQ");
 899                         goto error;
 900                 }
 901                 rte_flow->wq = ibv_exp_create_wq(priv->ctx,
 902                                                  &(struct ibv_exp_wq_init_attr){
 903                                                  .wq_type = IBV_EXP_WQT_RQ,
 904                                                  .max_recv_wr = 1,
 905                                                  .max_recv_sge = 1,
 906                                                  .pd = priv->pd,
 907                                                  .cq = rte_flow->cq,
 908                                                  });
 909         } else {
 910                 rxq = container_of((*priv->rxqs)[action->queue_id],
 911                                    struct rxq_ctrl, rxq);
 912                 rte_flow->rxq = &rxq->rxq;
 913                 rxq->rxq.mark |= action->mark;
 914                 rte_flow->wq = rxq->wq;
 915         }
 916         rte_flow->mark = action->mark;
 917         rte_flow->ibv_attr = ibv_attr;
 918         rte_flow->ind_table = ibv_exp_create_rwq_ind_table(
 919                 priv->ctx,
 920                 &(struct ibv_exp_rwq_ind_table_init_attr){
 921                         .pd = priv->pd,
 922                         .log_ind_tbl_size = 0,
 923                         .ind_tbl = &rte_flow->wq,
 924                         .comp_mask = 0,
 925                 });
 926         if (!rte_flow->ind_table) {
 927                 rte_flow_error_set(error, ENOMEM, RTE_FLOW_ERROR_TYPE_HANDLE,
 928                                    NULL, "cannot allocate indirection table");
 929                 goto error;
 930         }
 931         rte_flow->qp = ibv_exp_create_qp(
 932                 priv->ctx,
 933                 &(struct ibv_exp_qp_init_attr){
 934                         .qp_type = IBV_QPT_RAW_PACKET,
 935                         .comp_mask =
 936                                 IBV_EXP_QP_INIT_ATTR_PD |
 937                                 IBV_EXP_QP_INIT_ATTR_PORT |
 938                                 IBV_EXP_QP_INIT_ATTR_RX_HASH,
 939                         .pd = priv->pd,
 940                         .rx_hash_conf = &(struct ibv_exp_rx_hash_conf){
 941                                 .rx_hash_function =
 942                                         IBV_EXP_RX_HASH_FUNC_TOEPLITZ,
 943                                 .rx_hash_key_len = rss_hash_default_key_len,
 944                                 .rx_hash_key = rss_hash_default_key,
 945                                 .rx_hash_fields_mask = 0,
 946                                 .rwq_ind_tbl = rte_flow->ind_table,
 947                         },
 948                         .port_num = priv->port,
 949                 });
 950         if (!rte_flow->qp) {
 951                 rte_flow_error_set(error, ENOMEM, RTE_FLOW_ERROR_TYPE_HANDLE,
 952                                    NULL, "cannot allocate QP");
 953                 goto error;
 954         }
 955         rte_flow->ibv_flow = ibv_exp_create_flow(rte_flow->qp,
 956                                                  rte_flow->ibv_attr);
 957         if (!rte_flow->ibv_flow) {
 958                 rte_flow_error_set(error, ENOMEM, RTE_FLOW_ERROR_TYPE_HANDLE,
 959                                    NULL, "flow rule creation failure");
 960                 goto error;
 961         }
 962         return rte_flow;
 963 error:
 964         assert(rte_flow);
 965         if (rte_flow->qp)
 966                 ibv_destroy_qp(rte_flow->qp);
 967         if (rte_flow->ind_table)
 968                 ibv_exp_destroy_rwq_ind_table(rte_flow->ind_table);
 969         if (!rte_flow->rxq && rte_flow->wq)
 970                 ibv_exp_destroy_wq(rte_flow->wq);
 971         if (!rte_flow->rxq && rte_flow->cq)
 972                 ibv_destroy_cq(rte_flow->cq);
 973         rte_free(rte_flow->ibv_attr);
 974         rte_free(rte_flow);
 975         return NULL;
 976 }
 977
 978 /**
 979  * Convert a flow.
 980  *
 981  * @param priv
 982  *   Pointer to private structure.
 983  * @param[in] attr
 984  *   Flow rule attributes.
 985  * @param[in] pattern
 986  *   Pattern specification (list terminated by the END pattern item).
 987  * @param[in] actions
 988  *   Associated actions (list terminated by the END action).
 989  * @param[out] error
 990  *   Perform verbose error reporting if not NULL.
 991  *
 992  * @return
 993  *   A flow on success, NULL otherwise.
 994  */
 995 static struct rte_flow *
 996 priv_flow_create(struct priv *priv,
 997                  const struct rte_flow_attr *attr,
 998                  const struct rte_flow_item items[],
 999                  const struct rte_flow_action actions[],
1000                  struct rte_flow_error *error)
1001 {
1002         struct rte_flow *rte_flow;
1003         struct mlx5_flow_action action;
1004         struct mlx5_flow flow = { .offset = sizeof(struct ibv_exp_flow_attr), };
1005         int err;
1006
1007         err = priv_flow_validate(priv, attr, items, actions, error, &flow);
1008         if (err)
1009                 goto exit;
1010         flow.ibv_attr = rte_malloc(__func__, flow.offset, 0);
1011         flow.offset = sizeof(struct ibv_exp_flow_attr);
1012         if (!flow.ibv_attr) {
1013                 rte_flow_error_set(error, ENOMEM, RTE_FLOW_ERROR_TYPE_HANDLE,
1014                                    NULL, "cannot allocate ibv_attr memory");
1015                 goto exit;
1016         }
1017         *flow.ibv_attr = (struct ibv_exp_flow_attr){
1018                 .type = IBV_EXP_FLOW_ATTR_NORMAL,
1019                 .size = sizeof(struct ibv_exp_flow_attr),
1020                 .priority = attr->priority,
1021                 .num_of_specs = 0,
1022                 .port = 0,
1023                 .flags = 0,
1024                 .reserved = 0,
1025         };
1026         flow.inner = 0;
1027         claim_zero(priv_flow_validate(priv, attr, items, actions,
1028                                       error, &flow));
1029         action = (struct mlx5_flow_action){
1030                 .queue = 0,
1031                 .drop = 0,
1032                 .mark = 0,
1033                 .mark_id = MLX5_FLOW_MARK_DEFAULT,
1034         };
1035         for (; actions->type != RTE_FLOW_ACTION_TYPE_END; ++actions) {
1036                 if (actions->type == RTE_FLOW_ACTION_TYPE_VOID) {
1037                         continue;
1038                 } else if (actions->type == RTE_FLOW_ACTION_TYPE_QUEUE) {
1039                         action.queue = 1;
1040                         action.queue_id =
1041                                 ((const struct rte_flow_action_queue *)
1042                                  actions->conf)->index;
1043                 } else if (actions->type == RTE_FLOW_ACTION_TYPE_DROP) {
1044                         action.drop = 1;
1045                         action.mark = 0;
1046                 } else if (actions->type == RTE_FLOW_ACTION_TYPE_MARK) {
1047                         const struct rte_flow_action_mark *mark =
1048                                 (const struct rte_flow_action_mark *)
1049                                 actions->conf;
1050
1051                         if (mark)
1052                                 action.mark_id = mark->id;
1053                         action.mark = !action.drop;
1054                 } else {
1055                         rte_flow_error_set(error, ENOTSUP,
1056                                            RTE_FLOW_ERROR_TYPE_ACTION,
1057                                            actions, "unsupported action");
1058                         goto exit;
1059                 }
1060         }
1061         if (action.mark) {
1062                 mlx5_flow_create_flag_mark(&flow, action.mark_id);
1063                 flow.offset += sizeof(struct ibv_exp_flow_spec_action_tag);
1064         }
1065         rte_flow = priv_flow_create_action_queue(priv, flow.ibv_attr,
1066                                                  &action, error);
1067         return rte_flow;
1068 exit:
1069         rte_free(flow.ibv_attr);
1070         return NULL;
1071 }
1072
1073 /**
1074  * Create a flow.
1075  *
1076  * @see rte_flow_create()
1077  * @see rte_flow_ops
1078  */
1079 struct rte_flow *
1080 mlx5_flow_create(struct rte_eth_dev *dev,
1081                  const struct rte_flow_attr *attr,
1082                  const struct rte_flow_item items[],
1083                  const struct rte_flow_action actions[],
1084                  struct rte_flow_error *error)
1085 {
1086         struct priv *priv = dev->data->dev_private;
1087         struct rte_flow *flow;
1088
1089         priv_lock(priv);
1090         flow = priv_flow_create(priv, attr, items, actions, error);
1091         if (flow) {
1092                 LIST_INSERT_HEAD(&priv->flows, flow, next);
1093                 DEBUG("Flow created %p", (void *)flow);
1094         }
1095         priv_unlock(priv);
1096         return flow;
1097 }
1098
1099 /**
1100  * Destroy a flow.
1101  *
1102  * @param priv
1103  *   Pointer to private structure.
1104  * @param[in] flow
1105  *   Flow to destroy.
1106  */
1107 static void
1108 priv_flow_destroy(struct priv *priv,
1109                   struct rte_flow *flow)
1110 {
1111         (void)priv;
1112         LIST_REMOVE(flow, next);
1113         if (flow->ibv_flow)
1114                 claim_zero(ibv_exp_destroy_flow(flow->ibv_flow));
1115         if (flow->qp)
1116                 claim_zero(ibv_destroy_qp(flow->qp));
1117         if (flow->ind_table)
1118                 claim_zero(ibv_exp_destroy_rwq_ind_table(flow->ind_table));
1119         if (!flow->rxq && flow->wq)
1120                 claim_zero(ibv_exp_destroy_wq(flow->wq));
1121         if (!flow->rxq && flow->cq)
1122                 claim_zero(ibv_destroy_cq(flow->cq));
1123         if (flow->mark) {
1124                 struct rte_flow *tmp;
1125                 uint32_t mark_n = 0;
1126
1127                 for (tmp = LIST_FIRST(&priv->flows);
1128                      tmp;
1129                      tmp = LIST_NEXT(tmp, next)) {
1130                         if ((flow->rxq == tmp->rxq) && tmp->mark)
1131                                 ++mark_n;
1132                 }
1133                 flow->rxq->mark = !!mark_n;
1134         }
1135         rte_free(flow->ibv_attr);
1136         DEBUG("Flow destroyed %p", (void *)flow);
1137         rte_free(flow);
1138 }
1139
1140 /**
1141  * Destroy a flow.
1142  *
1143  * @see rte_flow_destroy()
1144  * @see rte_flow_ops
1145  */
1146 int
1147 mlx5_flow_destroy(struct rte_eth_dev *dev,
1148                   struct rte_flow *flow,
1149                   struct rte_flow_error *error)
1150 {
1151         struct priv *priv = dev->data->dev_private;
1152
1153         (void)error;
1154         priv_lock(priv);
1155         priv_flow_destroy(priv, flow);
1156         priv_unlock(priv);
1157         return 0;
1158 }
1159
1160 /**
1161  * Destroy all flows.
1162  *
1163  * @param priv
1164  *   Pointer to private structure.
1165  */
1166 static void
1167 priv_flow_flush(struct priv *priv)
1168 {
1169         while (!LIST_EMPTY(&priv->flows)) {
1170                 struct rte_flow *flow;
1171
1172                 flow = LIST_FIRST(&priv->flows);
1173                 priv_flow_destroy(priv, flow);
1174         }
1175 }
1176
1177 /**
1178  * Destroy all flows.
1179  *
1180  * @see rte_flow_flush()
1181  * @see rte_flow_ops
1182  */
1183 int
1184 mlx5_flow_flush(struct rte_eth_dev *dev,
1185                 struct rte_flow_error *error)
1186 {
1187         struct priv *priv = dev->data->dev_private;
1188
1189         (void)error;
1190         priv_lock(priv);
1191         priv_flow_flush(priv);
1192         priv_unlock(priv);
1193         return 0;
1194 }
1195
1196 /**
1197  * Remove all flows.
1198  *
1199  * Called by dev_stop() to remove all flows.
1200  *
1201  * @param priv
1202  *   Pointer to private structure.
1203  */
1204 void
1205 priv_flow_stop(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                 claim_zero(ibv_exp_destroy_flow(flow->ibv_flow));
1213                 flow->ibv_flow = NULL;
1214                 if (flow->mark)
1215                         flow->rxq->mark = 0;
1216                 DEBUG("Flow %p removed", (void *)flow);
1217         }
1218 }
1219
1220 /**
1221  * Add all flows.
1222  *
1223  * @param priv
1224  *   Pointer to private structure.
1225  *
1226  * @return
1227  *   0 on success, a errno value otherwise and rte_errno is set.
1228  */
1229 int
1230 priv_flow_start(struct priv *priv)
1231 {
1232         struct rte_flow *flow;
1233
1234         for (flow = LIST_FIRST(&priv->flows);
1235              flow;
1236              flow = LIST_NEXT(flow, next)) {
1237                 flow->ibv_flow = ibv_exp_create_flow(flow->qp,
1238                                                      flow->ibv_attr);
1239                 if (!flow->ibv_flow) {
1240                         DEBUG("Flow %p cannot be applied", (void *)flow);
1241                         rte_errno = EINVAL;
1242                         return rte_errno;
1243                 }
1244                 DEBUG("Flow %p applied", (void *)flow);
1245                 if (flow->rxq)
1246                         flow->rxq->mark |= flow->mark;
1247         }
1248         return 0;
1249 }