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         TAILQ_ENTRY(rte_flow) next; /**< Pointer to the next flow structure. */
  92         struct ibv_flow_attr *ibv_attr; /**< Pointer to Verbs attributes. */
  93         struct ibv_rwq_ind_table *ind_table; /**< Indirection table. */
  94         struct ibv_qp *qp; /**< Verbs queue pair. */
  95         struct ibv_flow *ibv_flow; /**< Verbs flow. */
  96         struct ibv_wq *wq; /**< Verbs work queue. */
  97         struct ibv_cq *cq; /**< Verbs completion queue. */
  98         uint16_t rxqs_n; /**< Number of queues in this flow, 0 if drop queue. */
  99         uint32_t mark:1; /**< Set if the flow is marked. */
 100         uint32_t drop:1; /**< Drop queue. */
 101         uint64_t hash_fields; /**< Fields that participate in the hash. */
 102         struct rxq *rxqs[]; /**< Pointer to the queues array. */
 103 };
 104
 105 /** Static initializer for items. */
 106 #define ITEMS(...) \
 107         (const enum rte_flow_item_type []){ \
 108                 __VA_ARGS__, RTE_FLOW_ITEM_TYPE_END, \
 109         }
 110
 111 /** Structure to generate a simple graph of layers supported by the NIC. */
 112 struct mlx5_flow_items {
 113         /** List of possible actions for these items. */
 114         const enum rte_flow_action_type *const actions;
 115         /** Bit-masks corresponding to the possibilities for the item. */
 116         const void *mask;
 117         /**
 118          * Default bit-masks to use when item->mask is not provided. When
 119          * \default_mask is also NULL, the full supported bit-mask (\mask) is
 120          * used instead.
 121          */
 122         const void *default_mask;
 123         /** Bit-masks size in bytes. */
 124         const unsigned int mask_sz;
 125         /**
 126          * Conversion function from rte_flow to NIC specific flow.
 127          *
 128          * @param item
 129          *   rte_flow item to convert.
 130          * @param default_mask
 131          *   Default bit-masks to use when item->mask is not provided.
 132          * @param data
 133          *   Internal structure to store the conversion.
 134          *
 135          * @return
 136          *   0 on success, negative value otherwise.
 137          */
 138         int (*convert)(const struct rte_flow_item *item,
 139                        const void *default_mask,
 140                        void *data);
 141         /** Size in bytes of the destination structure. */
 142         const unsigned int dst_sz;
 143         /** List of possible following items.  */
 144         const enum rte_flow_item_type *const items;
 145 };
 146
 147 /** Valid action for this PMD. */
 148 static const enum rte_flow_action_type valid_actions[] = {
 149         RTE_FLOW_ACTION_TYPE_DROP,
 150         RTE_FLOW_ACTION_TYPE_QUEUE,
 151         RTE_FLOW_ACTION_TYPE_MARK,
 152         RTE_FLOW_ACTION_TYPE_FLAG,
 153         RTE_FLOW_ACTION_TYPE_END,
 154 };
 155
 156 /** Graph of supported items and associated actions. */
 157 static const struct mlx5_flow_items mlx5_flow_items[] = {
 158         [RTE_FLOW_ITEM_TYPE_END] = {
 159                 .items = ITEMS(RTE_FLOW_ITEM_TYPE_ETH,
 160                                RTE_FLOW_ITEM_TYPE_VXLAN),
 161         },
 162         [RTE_FLOW_ITEM_TYPE_ETH] = {
 163                 .items = ITEMS(RTE_FLOW_ITEM_TYPE_VLAN,
 164                                RTE_FLOW_ITEM_TYPE_IPV4,
 165                                RTE_FLOW_ITEM_TYPE_IPV6),
 166                 .actions = valid_actions,
 167                 .mask = &(const struct rte_flow_item_eth){
 168                         .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 169                         .src.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 170                         .type = -1,
 171                 },
 172                 .default_mask = &rte_flow_item_eth_mask,
 173                 .mask_sz = sizeof(struct rte_flow_item_eth),
 174                 .convert = mlx5_flow_create_eth,
 175                 .dst_sz = sizeof(struct ibv_flow_spec_eth),
 176         },
 177         [RTE_FLOW_ITEM_TYPE_VLAN] = {
 178                 .items = ITEMS(RTE_FLOW_ITEM_TYPE_IPV4,
 179                                RTE_FLOW_ITEM_TYPE_IPV6),
 180                 .actions = valid_actions,
 181                 .mask = &(const struct rte_flow_item_vlan){
 182                         .tci = -1,
 183                 },
 184                 .default_mask = &rte_flow_item_vlan_mask,
 185                 .mask_sz = sizeof(struct rte_flow_item_vlan),
 186                 .convert = mlx5_flow_create_vlan,
 187                 .dst_sz = 0,
 188         },
 189         [RTE_FLOW_ITEM_TYPE_IPV4] = {
 190                 .items = ITEMS(RTE_FLOW_ITEM_TYPE_UDP,
 191                                RTE_FLOW_ITEM_TYPE_TCP),
 192                 .actions = valid_actions,
 193                 .mask = &(const struct rte_flow_item_ipv4){
 194                         .hdr = {
 195                                 .src_addr = -1,
 196                                 .dst_addr = -1,
 197                                 .type_of_service = -1,
 198                                 .next_proto_id = -1,
 199                         },
 200                 },
 201                 .default_mask = &rte_flow_item_ipv4_mask,
 202                 .mask_sz = sizeof(struct rte_flow_item_ipv4),
 203                 .convert = mlx5_flow_create_ipv4,
 204                 .dst_sz = sizeof(struct ibv_flow_spec_ipv4_ext),
 205         },
 206         [RTE_FLOW_ITEM_TYPE_IPV6] = {
 207                 .items = ITEMS(RTE_FLOW_ITEM_TYPE_UDP,
 208                                RTE_FLOW_ITEM_TYPE_TCP),
 209                 .actions = valid_actions,
 210                 .mask = &(const struct rte_flow_item_ipv6){
 211                         .hdr = {
 212                                 .src_addr = {
 213                                         0xff, 0xff, 0xff, 0xff,
 214                                         0xff, 0xff, 0xff, 0xff,
 215                                         0xff, 0xff, 0xff, 0xff,
 216                                         0xff, 0xff, 0xff, 0xff,
 217                                 },
 218                                 .dst_addr = {
 219                                         0xff, 0xff, 0xff, 0xff,
 220                                         0xff, 0xff, 0xff, 0xff,
 221                                         0xff, 0xff, 0xff, 0xff,
 222                                         0xff, 0xff, 0xff, 0xff,
 223                                 },
 224                                 .vtc_flow = -1,
 225                                 .proto = -1,
 226                                 .hop_limits = -1,
 227                         },
 228                 },
 229                 .default_mask = &rte_flow_item_ipv6_mask,
 230                 .mask_sz = sizeof(struct rte_flow_item_ipv6),
 231                 .convert = mlx5_flow_create_ipv6,
 232                 .dst_sz = sizeof(struct ibv_flow_spec_ipv6),
 233         },
 234         [RTE_FLOW_ITEM_TYPE_UDP] = {
 235                 .items = ITEMS(RTE_FLOW_ITEM_TYPE_VXLAN),
 236                 .actions = valid_actions,
 237                 .mask = &(const struct rte_flow_item_udp){
 238                         .hdr = {
 239                                 .src_port = -1,
 240                                 .dst_port = -1,
 241                         },
 242                 },
 243                 .default_mask = &rte_flow_item_udp_mask,
 244                 .mask_sz = sizeof(struct rte_flow_item_udp),
 245                 .convert = mlx5_flow_create_udp,
 246                 .dst_sz = sizeof(struct ibv_flow_spec_tcp_udp),
 247         },
 248         [RTE_FLOW_ITEM_TYPE_TCP] = {
 249                 .actions = valid_actions,
 250                 .mask = &(const struct rte_flow_item_tcp){
 251                         .hdr = {
 252                                 .src_port = -1,
 253                                 .dst_port = -1,
 254                         },
 255                 },
 256                 .default_mask = &rte_flow_item_tcp_mask,
 257                 .mask_sz = sizeof(struct rte_flow_item_tcp),
 258                 .convert = mlx5_flow_create_tcp,
 259                 .dst_sz = sizeof(struct ibv_flow_spec_tcp_udp),
 260         },
 261         [RTE_FLOW_ITEM_TYPE_VXLAN] = {
 262                 .items = ITEMS(RTE_FLOW_ITEM_TYPE_ETH),
 263                 .actions = valid_actions,
 264                 .mask = &(const struct rte_flow_item_vxlan){
 265                         .vni = "\xff\xff\xff",
 266                 },
 267                 .default_mask = &rte_flow_item_vxlan_mask,
 268                 .mask_sz = sizeof(struct rte_flow_item_vxlan),
 269                 .convert = mlx5_flow_create_vxlan,
 270                 .dst_sz = sizeof(struct ibv_flow_spec_tunnel),
 271         },
 272 };
 273
 274 /** Structure to pass to the conversion function. */
 275 struct mlx5_flow {
 276         struct ibv_flow_attr *ibv_attr; /**< Verbs attribute. */
 277         unsigned int offset; /**< Offset in bytes in the ibv_attr buffer. */
 278         uint32_t inner; /**< Set once VXLAN is encountered. */
 279         uint64_t hash_fields; /**< Fields that participate in the hash. */
 280 };
 281
 282 /** Structure for Drop queue. */
 283 struct rte_flow_drop {
 284         struct ibv_rwq_ind_table *ind_table; /**< Indirection table. */
 285         struct ibv_qp *qp; /**< Verbs queue pair. */
 286         struct ibv_wq *wq; /**< Verbs work queue. */
 287         struct ibv_cq *cq; /**< Verbs completion queue. */
 288 };
 289
 290 struct mlx5_flow_action {
 291         uint32_t queue:1; /**< Target is a receive queue. */
 292         uint32_t drop:1; /**< Target is a drop queue. */
 293         uint32_t mark:1; /**< Mark is present in the flow. */
 294         uint32_t mark_id; /**< Mark identifier. */
 295         uint16_t queues[RTE_MAX_QUEUES_PER_PORT]; /**< Queues indexes to use. */
 296         uint16_t queues_n; /**< Number of entries in queue[]. */
 297 };
 298
 299 /**
 300  * Check support for a given item.
 301  *
 302  * @param item[in]
 303  *   Item specification.
 304  * @param mask[in]
 305  *   Bit-masks covering supported fields to compare with spec, last and mask in
 306  *   \item.
 307  * @param size
 308  *   Bit-Mask size in bytes.
 309  *
 310  * @return
 311  *   0 on success.
 312  */
 313 static int
 314 mlx5_flow_item_validate(const struct rte_flow_item *item,
 315                         const uint8_t *mask, unsigned int size)
 316 {
 317         int ret = 0;
 318
 319         if (!item->spec && (item->mask || item->last))
 320                 return -1;
 321         if (item->spec && !item->mask) {
 322                 unsigned int i;
 323                 const uint8_t *spec = item->spec;
 324
 325                 for (i = 0; i < size; ++i)
 326                         if ((spec[i] | mask[i]) != mask[i])
 327                                 return -1;
 328         }
 329         if (item->last && !item->mask) {
 330                 unsigned int i;
 331                 const uint8_t *spec = item->last;
 332
 333                 for (i = 0; i < size; ++i)
 334                         if ((spec[i] | mask[i]) != mask[i])
 335                                 return -1;
 336         }
 337         if (item->mask) {
 338                 unsigned int i;
 339                 const uint8_t *spec = item->mask;
 340
 341                 for (i = 0; i < size; ++i)
 342                         if ((spec[i] | mask[i]) != mask[i])
 343                                 return -1;
 344         }
 345         if (item->spec && item->last) {
 346                 uint8_t spec[size];
 347                 uint8_t last[size];
 348                 const uint8_t *apply = mask;
 349                 unsigned int i;
 350
 351                 if (item->mask)
 352                         apply = item->mask;
 353                 for (i = 0; i < size; ++i) {
 354                         spec[i] = ((const uint8_t *)item->spec)[i] & apply[i];
 355                         last[i] = ((const uint8_t *)item->last)[i] & apply[i];
 356                 }
 357                 ret = memcmp(spec, last, size);
 358         }
 359         return ret;
 360 }
 361
 362 /**
 363  * Validate a flow supported by the NIC.
 364  *
 365  * @param priv
 366  *   Pointer to private structure.
 367  * @param[in] attr
 368  *   Flow rule attributes.
 369  * @param[in] pattern
 370  *   Pattern specification (list terminated by the END pattern item).
 371  * @param[in] actions
 372  *   Associated actions (list terminated by the END action).
 373  * @param[out] error
 374  *   Perform verbose error reporting if not NULL.
 375  * @param[in, out] flow
 376  *   Flow structure to update.
 377  * @param[in, out] action
 378  *   Action structure to update.
 379  *
 380  * @return
 381  *   0 on success, a negative errno value otherwise and rte_errno is set.
 382  */
 383 static int
 384 priv_flow_validate(struct priv *priv,
 385                    const struct rte_flow_attr *attr,
 386                    const struct rte_flow_item items[],
 387                    const struct rte_flow_action actions[],
 388                    struct rte_flow_error *error,
 389                    struct mlx5_flow *flow,
 390                    struct mlx5_flow_action *action)
 391 {
 392         const struct mlx5_flow_items *cur_item = mlx5_flow_items;
 393
 394         (void)priv;
 395         if (attr->group) {
 396                 rte_flow_error_set(error, ENOTSUP,
 397                                    RTE_FLOW_ERROR_TYPE_ATTR_GROUP,
 398                                    NULL,
 399                                    "groups are not supported");
 400                 return -rte_errno;
 401         }
 402         if (attr->priority) {
 403                 rte_flow_error_set(error, ENOTSUP,
 404                                    RTE_FLOW_ERROR_TYPE_ATTR_PRIORITY,
 405                                    NULL,
 406                                    "priorities are not supported");
 407                 return -rte_errno;
 408         }
 409         if (attr->egress) {
 410                 rte_flow_error_set(error, ENOTSUP,
 411                                    RTE_FLOW_ERROR_TYPE_ATTR_EGRESS,
 412                                    NULL,
 413                                    "egress is not supported");
 414                 return -rte_errno;
 415         }
 416         if (!attr->ingress) {
 417                 rte_flow_error_set(error, ENOTSUP,
 418                                    RTE_FLOW_ERROR_TYPE_ATTR_INGRESS,
 419                                    NULL,
 420                                    "only ingress is supported");
 421                 return -rte_errno;
 422         }
 423         for (; items->type != RTE_FLOW_ITEM_TYPE_END; ++items) {
 424                 const struct mlx5_flow_items *token = NULL;
 425                 unsigned int i;
 426                 int err;
 427
 428                 if (items->type == RTE_FLOW_ITEM_TYPE_VOID)
 429                         continue;
 430                 for (i = 0;
 431                      cur_item->items &&
 432                      cur_item->items[i] != RTE_FLOW_ITEM_TYPE_END;
 433                      ++i) {
 434                         if (cur_item->items[i] == items->type) {
 435                                 token = &mlx5_flow_items[items->type];
 436                                 break;
 437                         }
 438                 }
 439                 if (!token)
 440                         goto exit_item_not_supported;
 441                 cur_item = token;
 442                 err = mlx5_flow_item_validate(items,
 443                                               (const uint8_t *)cur_item->mask,
 444                                               cur_item->mask_sz);
 445                 if (err)
 446                         goto exit_item_not_supported;
 447                 if (flow->ibv_attr && cur_item->convert) {
 448                         err = cur_item->convert(items,
 449                                                 (cur_item->default_mask ?
 450                                                  cur_item->default_mask :
 451                                                  cur_item->mask),
 452                                                 flow);
 453                         if (err)
 454                                 goto exit_item_not_supported;
 455                 } else if (items->type == RTE_FLOW_ITEM_TYPE_VXLAN) {
 456                         if (flow->inner) {
 457                                 rte_flow_error_set(error, ENOTSUP,
 458                                                    RTE_FLOW_ERROR_TYPE_ITEM,
 459                                                    items,
 460                                                    "cannot recognize multiple"
 461                                                    " VXLAN encapsulations");
 462                                 return -rte_errno;
 463                         }
 464                         flow->inner = 1;
 465                 }
 466                 flow->offset += cur_item->dst_sz;
 467         }
 468         for (; actions->type != RTE_FLOW_ACTION_TYPE_END; ++actions) {
 469                 if (actions->type == RTE_FLOW_ACTION_TYPE_VOID) {
 470                         continue;
 471                 } else if (actions->type == RTE_FLOW_ACTION_TYPE_DROP) {
 472                         action->drop = 1;
 473                 } else if (actions->type == RTE_FLOW_ACTION_TYPE_QUEUE) {
 474                         const struct rte_flow_action_queue *queue =
 475                                 (const struct rte_flow_action_queue *)
 476                                 actions->conf;
 477                         uint16_t n;
 478                         uint16_t found = 0;
 479
 480                         if (!queue || (queue->index > (priv->rxqs_n - 1)))
 481                                 goto exit_action_not_supported;
 482                         for (n = 0; n < action->queues_n; ++n) {
 483                                 if (action->queues[n] == queue->index) {
 484                                         found = 1;
 485                                         break;
 486                                 }
 487                         }
 488                         if (action->queues_n > 1 && !found) {
 489                                 rte_flow_error_set(error, ENOTSUP,
 490                                            RTE_FLOW_ERROR_TYPE_ACTION,
 491                                            actions,
 492                                            "queue action not in RSS queues");
 493                                 return -rte_errno;
 494                         }
 495                         if (!found) {
 496                                 action->queue = 1;
 497                                 action->queues_n = 1;
 498                                 action->queues[0] = queue->index;
 499                         }
 500                 } else if (actions->type == RTE_FLOW_ACTION_TYPE_RSS) {
 501                         const struct rte_flow_action_rss *rss =
 502                                 (const struct rte_flow_action_rss *)
 503                                 actions->conf;
 504                         uint16_t n;
 505
 506                         if (!rss || !rss->num) {
 507                                 rte_flow_error_set(error, EINVAL,
 508                                                    RTE_FLOW_ERROR_TYPE_ACTION,
 509                                                    actions,
 510                                                    "no valid queues");
 511                                 return -rte_errno;
 512                         }
 513                         if (action->queues_n == 1) {
 514                                 uint16_t found = 0;
 515
 516                                 assert(action->queues_n);
 517                                 for (n = 0; n < rss->num; ++n) {
 518                                         if (action->queues[0] ==
 519                                             rss->queue[n]) {
 520                                                 found = 1;
 521                                                 break;
 522                                         }
 523                                 }
 524                                 if (!found) {
 525                                         rte_flow_error_set(error, ENOTSUP,
 526                                                    RTE_FLOW_ERROR_TYPE_ACTION,
 527                                                    actions,
 528                                                    "queue action not in RSS"
 529                                                    " queues");
 530                                         return -rte_errno;
 531                                 }
 532                         }
 533                         for (n = 0; n < rss->num; ++n) {
 534                                 if (rss->queue[n] >= priv->rxqs_n) {
 535                                         rte_flow_error_set(error, EINVAL,
 536                                                    RTE_FLOW_ERROR_TYPE_ACTION,
 537                                                    actions,
 538                                                    "queue id > number of"
 539                                                    " queues");
 540                                         return -rte_errno;
 541                                 }
 542                         }
 543                         action->queue = 1;
 544                         for (n = 0; n < rss->num; ++n)
 545                                 action->queues[n] = rss->queue[n];
 546                         action->queues_n = rss->num;
 547                 } else if (actions->type == RTE_FLOW_ACTION_TYPE_MARK) {
 548                         const struct rte_flow_action_mark *mark =
 549                                 (const struct rte_flow_action_mark *)
 550                                 actions->conf;
 551
 552                         if (!mark) {
 553                                 rte_flow_error_set(error, EINVAL,
 554                                                    RTE_FLOW_ERROR_TYPE_ACTION,
 555                                                    actions,
 556                                                    "mark must be defined");
 557                                 return -rte_errno;
 558                         } else if (mark->id >= MLX5_FLOW_MARK_MAX) {
 559                                 rte_flow_error_set(error, ENOTSUP,
 560                                                    RTE_FLOW_ERROR_TYPE_ACTION,
 561                                                    actions,
 562                                                    "mark must be between 0"
 563                                                    " and 16777199");
 564                                 return -rte_errno;
 565                         }
 566                         action->mark = 1;
 567                         action->mark_id = mark->id;
 568                 } else if (actions->type == RTE_FLOW_ACTION_TYPE_FLAG) {
 569                         action->mark = 1;
 570                 } else {
 571                         goto exit_action_not_supported;
 572                 }
 573         }
 574         if (action->mark && !flow->ibv_attr && !action->drop)
 575                 flow->offset += sizeof(struct ibv_flow_spec_action_tag);
 576         if (!flow->ibv_attr && action->drop)
 577                 flow->offset += sizeof(struct ibv_flow_spec_action_drop);
 578         if (!action->queue && !action->drop) {
 579                 rte_flow_error_set(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_HANDLE,
 580                                    NULL, "no valid action");
 581                 return -rte_errno;
 582         }
 583         return 0;
 584 exit_item_not_supported:
 585         rte_flow_error_set(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ITEM,
 586                            items, "item not supported");
 587         return -rte_errno;
 588 exit_action_not_supported:
 589         rte_flow_error_set(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ACTION,
 590                            actions, "action not supported");
 591         return -rte_errno;
 592 }
 593
 594 /**
 595  * Validate a flow supported by the NIC.
 596  *
 597  * @see rte_flow_validate()
 598  * @see rte_flow_ops
 599  */
 600 int
 601 mlx5_flow_validate(struct rte_eth_dev *dev,
 602                    const struct rte_flow_attr *attr,
 603                    const struct rte_flow_item items[],
 604                    const struct rte_flow_action actions[],
 605                    struct rte_flow_error *error)
 606 {
 607         struct priv *priv = dev->data->dev_private;
 608         int ret;
 609         struct mlx5_flow flow = { .offset = sizeof(struct ibv_flow_attr) };
 610         struct mlx5_flow_action action = {
 611                 .queue = 0,
 612                 .drop = 0,
 613                 .mark = 0,
 614                 .mark_id = MLX5_FLOW_MARK_DEFAULT,
 615                 .queues_n = 0,
 616         };
 617
 618         priv_lock(priv);
 619         ret = priv_flow_validate(priv, attr, items, actions, error, &flow,
 620                                  &action);
 621         priv_unlock(priv);
 622         return ret;
 623 }
 624
 625 /**
 626  * Convert Ethernet item to Verbs specification.
 627  *
 628  * @param item[in]
 629  *   Item specification.
 630  * @param default_mask[in]
 631  *   Default bit-masks to use when item->mask is not provided.
 632  * @param data[in, out]
 633  *   User structure.
 634  */
 635 static int
 636 mlx5_flow_create_eth(const struct rte_flow_item *item,
 637                      const void *default_mask,
 638                      void *data)
 639 {
 640         const struct rte_flow_item_eth *spec = item->spec;
 641         const struct rte_flow_item_eth *mask = item->mask;
 642         struct mlx5_flow *flow = (struct mlx5_flow *)data;
 643         struct ibv_flow_spec_eth *eth;
 644         const unsigned int eth_size = sizeof(struct ibv_flow_spec_eth);
 645         unsigned int i;
 646
 647         ++flow->ibv_attr->num_of_specs;
 648         flow->ibv_attr->priority = 2;
 649         flow->hash_fields = 0;
 650         eth = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
 651         *eth = (struct ibv_flow_spec_eth) {
 652                 .type = flow->inner | IBV_FLOW_SPEC_ETH,
 653                 .size = eth_size,
 654         };
 655         if (!spec)
 656                 return 0;
 657         if (!mask)
 658                 mask = default_mask;
 659         memcpy(eth->val.dst_mac, spec->dst.addr_bytes, ETHER_ADDR_LEN);
 660         memcpy(eth->val.src_mac, spec->src.addr_bytes, ETHER_ADDR_LEN);
 661         eth->val.ether_type = spec->type;
 662         memcpy(eth->mask.dst_mac, mask->dst.addr_bytes, ETHER_ADDR_LEN);
 663         memcpy(eth->mask.src_mac, mask->src.addr_bytes, ETHER_ADDR_LEN);
 664         eth->mask.ether_type = mask->type;
 665         /* Remove unwanted bits from values. */
 666         for (i = 0; i < ETHER_ADDR_LEN; ++i) {
 667                 eth->val.dst_mac[i] &= eth->mask.dst_mac[i];
 668                 eth->val.src_mac[i] &= eth->mask.src_mac[i];
 669         }
 670         eth->val.ether_type &= eth->mask.ether_type;
 671         return 0;
 672 }
 673
 674 /**
 675  * Convert VLAN item to Verbs specification.
 676  *
 677  * @param item[in]
 678  *   Item specification.
 679  * @param default_mask[in]
 680  *   Default bit-masks to use when item->mask is not provided.
 681  * @param data[in, out]
 682  *   User structure.
 683  */
 684 static int
 685 mlx5_flow_create_vlan(const struct rte_flow_item *item,
 686                       const void *default_mask,
 687                       void *data)
 688 {
 689         const struct rte_flow_item_vlan *spec = item->spec;
 690         const struct rte_flow_item_vlan *mask = item->mask;
 691         struct mlx5_flow *flow = (struct mlx5_flow *)data;
 692         struct ibv_flow_spec_eth *eth;
 693         const unsigned int eth_size = sizeof(struct ibv_flow_spec_eth);
 694
 695         eth = (void *)((uintptr_t)flow->ibv_attr + flow->offset - eth_size);
 696         if (!spec)
 697                 return 0;
 698         if (!mask)
 699                 mask = default_mask;
 700         eth->val.vlan_tag = spec->tci;
 701         eth->mask.vlan_tag = mask->tci;
 702         eth->val.vlan_tag &= eth->mask.vlan_tag;
 703         return 0;
 704 }
 705
 706 /**
 707  * Convert IPv4 item to Verbs specification.
 708  *
 709  * @param item[in]
 710  *   Item specification.
 711  * @param default_mask[in]
 712  *   Default bit-masks to use when item->mask is not provided.
 713  * @param data[in, out]
 714  *   User structure.
 715  */
 716 static int
 717 mlx5_flow_create_ipv4(const struct rte_flow_item *item,
 718                       const void *default_mask,
 719                       void *data)
 720 {
 721         const struct rte_flow_item_ipv4 *spec = item->spec;
 722         const struct rte_flow_item_ipv4 *mask = item->mask;
 723         struct mlx5_flow *flow = (struct mlx5_flow *)data;
 724         struct ibv_flow_spec_ipv4_ext *ipv4;
 725         unsigned int ipv4_size = sizeof(struct ibv_flow_spec_ipv4_ext);
 726
 727         ++flow->ibv_attr->num_of_specs;
 728         flow->ibv_attr->priority = 1;
 729         flow->hash_fields = (IBV_RX_HASH_SRC_IPV4 |
 730                              IBV_RX_HASH_DST_IPV4);
 731         ipv4 = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
 732         *ipv4 = (struct ibv_flow_spec_ipv4_ext) {
 733                 .type = flow->inner | IBV_FLOW_SPEC_IPV4_EXT,
 734                 .size = ipv4_size,
 735         };
 736         if (!spec)
 737                 return 0;
 738         if (!mask)
 739                 mask = default_mask;
 740         ipv4->val = (struct ibv_flow_ipv4_ext_filter){
 741                 .src_ip = spec->hdr.src_addr,
 742                 .dst_ip = spec->hdr.dst_addr,
 743                 .proto = spec->hdr.next_proto_id,
 744                 .tos = spec->hdr.type_of_service,
 745         };
 746         ipv4->mask = (struct ibv_flow_ipv4_ext_filter){
 747                 .src_ip = mask->hdr.src_addr,
 748                 .dst_ip = mask->hdr.dst_addr,
 749                 .proto = mask->hdr.next_proto_id,
 750                 .tos = mask->hdr.type_of_service,
 751         };
 752         /* Remove unwanted bits from values. */
 753         ipv4->val.src_ip &= ipv4->mask.src_ip;
 754         ipv4->val.dst_ip &= ipv4->mask.dst_ip;
 755         ipv4->val.proto &= ipv4->mask.proto;
 756         ipv4->val.tos &= ipv4->mask.tos;
 757         return 0;
 758 }
 759
 760 /**
 761  * Convert IPv6 item to Verbs specification.
 762  *
 763  * @param item[in]
 764  *   Item specification.
 765  * @param default_mask[in]
 766  *   Default bit-masks to use when item->mask is not provided.
 767  * @param data[in, out]
 768  *   User structure.
 769  */
 770 static int
 771 mlx5_flow_create_ipv6(const struct rte_flow_item *item,
 772                       const void *default_mask,
 773                       void *data)
 774 {
 775         const struct rte_flow_item_ipv6 *spec = item->spec;
 776         const struct rte_flow_item_ipv6 *mask = item->mask;
 777         struct mlx5_flow *flow = (struct mlx5_flow *)data;
 778         struct ibv_flow_spec_ipv6 *ipv6;
 779         unsigned int ipv6_size = sizeof(struct ibv_flow_spec_ipv6);
 780         unsigned int i;
 781
 782         ++flow->ibv_attr->num_of_specs;
 783         flow->ibv_attr->priority = 1;
 784         flow->hash_fields = (IBV_RX_HASH_SRC_IPV6 |
 785                              IBV_RX_HASH_DST_IPV6);
 786         ipv6 = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
 787         *ipv6 = (struct ibv_flow_spec_ipv6) {
 788                 .type = flow->inner | IBV_FLOW_SPEC_IPV6,
 789                 .size = ipv6_size,
 790         };
 791         if (!spec)
 792                 return 0;
 793         if (!mask)
 794                 mask = default_mask;
 795         memcpy(ipv6->val.src_ip, spec->hdr.src_addr,
 796                RTE_DIM(ipv6->val.src_ip));
 797         memcpy(ipv6->val.dst_ip, spec->hdr.dst_addr,
 798                RTE_DIM(ipv6->val.dst_ip));
 799         memcpy(ipv6->mask.src_ip, mask->hdr.src_addr,
 800                RTE_DIM(ipv6->mask.src_ip));
 801         memcpy(ipv6->mask.dst_ip, mask->hdr.dst_addr,
 802                RTE_DIM(ipv6->mask.dst_ip));
 803         ipv6->mask.flow_label = mask->hdr.vtc_flow;
 804         ipv6->mask.next_hdr = mask->hdr.proto;
 805         ipv6->mask.hop_limit = mask->hdr.hop_limits;
 806         /* Remove unwanted bits from values. */
 807         for (i = 0; i < RTE_DIM(ipv6->val.src_ip); ++i) {
 808                 ipv6->val.src_ip[i] &= ipv6->mask.src_ip[i];
 809                 ipv6->val.dst_ip[i] &= ipv6->mask.dst_ip[i];
 810         }
 811         ipv6->val.flow_label &= ipv6->mask.flow_label;
 812         ipv6->val.next_hdr &= ipv6->mask.next_hdr;
 813         ipv6->val.hop_limit &= ipv6->mask.hop_limit;
 814         return 0;
 815 }
 816
 817 /**
 818  * Convert UDP item to Verbs specification.
 819  *
 820  * @param item[in]
 821  *   Item specification.
 822  * @param default_mask[in]
 823  *   Default bit-masks to use when item->mask is not provided.
 824  * @param data[in, out]
 825  *   User structure.
 826  */
 827 static int
 828 mlx5_flow_create_udp(const struct rte_flow_item *item,
 829                      const void *default_mask,
 830                      void *data)
 831 {
 832         const struct rte_flow_item_udp *spec = item->spec;
 833         const struct rte_flow_item_udp *mask = item->mask;
 834         struct mlx5_flow *flow = (struct mlx5_flow *)data;
 835         struct ibv_flow_spec_tcp_udp *udp;
 836         unsigned int udp_size = sizeof(struct ibv_flow_spec_tcp_udp);
 837
 838         ++flow->ibv_attr->num_of_specs;
 839         flow->ibv_attr->priority = 0;
 840         flow->hash_fields |= (IBV_RX_HASH_SRC_PORT_UDP |
 841                               IBV_RX_HASH_DST_PORT_UDP);
 842         udp = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
 843         *udp = (struct ibv_flow_spec_tcp_udp) {
 844                 .type = flow->inner | IBV_FLOW_SPEC_UDP,
 845                 .size = udp_size,
 846         };
 847         if (!spec)
 848                 return 0;
 849         if (!mask)
 850                 mask = default_mask;
 851         udp->val.dst_port = spec->hdr.dst_port;
 852         udp->val.src_port = spec->hdr.src_port;
 853         udp->mask.dst_port = mask->hdr.dst_port;
 854         udp->mask.src_port = mask->hdr.src_port;
 855         /* Remove unwanted bits from values. */
 856         udp->val.src_port &= udp->mask.src_port;
 857         udp->val.dst_port &= udp->mask.dst_port;
 858         return 0;
 859 }
 860
 861 /**
 862  * Convert TCP item to Verbs specification.
 863  *
 864  * @param item[in]
 865  *   Item specification.
 866  * @param default_mask[in]
 867  *   Default bit-masks to use when item->mask is not provided.
 868  * @param data[in, out]
 869  *   User structure.
 870  */
 871 static int
 872 mlx5_flow_create_tcp(const struct rte_flow_item *item,
 873                      const void *default_mask,
 874                      void *data)
 875 {
 876         const struct rte_flow_item_tcp *spec = item->spec;
 877         const struct rte_flow_item_tcp *mask = item->mask;
 878         struct mlx5_flow *flow = (struct mlx5_flow *)data;
 879         struct ibv_flow_spec_tcp_udp *tcp;
 880         unsigned int tcp_size = sizeof(struct ibv_flow_spec_tcp_udp);
 881
 882         ++flow->ibv_attr->num_of_specs;
 883         flow->ibv_attr->priority = 0;
 884         flow->hash_fields |= (IBV_RX_HASH_SRC_PORT_TCP |
 885                               IBV_RX_HASH_DST_PORT_TCP);
 886         tcp = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
 887         *tcp = (struct ibv_flow_spec_tcp_udp) {
 888                 .type = flow->inner | IBV_FLOW_SPEC_TCP,
 889                 .size = tcp_size,
 890         };
 891         if (!spec)
 892                 return 0;
 893         if (!mask)
 894                 mask = default_mask;
 895         tcp->val.dst_port = spec->hdr.dst_port;
 896         tcp->val.src_port = spec->hdr.src_port;
 897         tcp->mask.dst_port = mask->hdr.dst_port;
 898         tcp->mask.src_port = mask->hdr.src_port;
 899         /* Remove unwanted bits from values. */
 900         tcp->val.src_port &= tcp->mask.src_port;
 901         tcp->val.dst_port &= tcp->mask.dst_port;
 902         return 0;
 903 }
 904
 905 /**
 906  * Convert VXLAN item to Verbs specification.
 907  *
 908  * @param item[in]
 909  *   Item specification.
 910  * @param default_mask[in]
 911  *   Default bit-masks to use when item->mask is not provided.
 912  * @param data[in, out]
 913  *   User structure.
 914  */
 915 static int
 916 mlx5_flow_create_vxlan(const struct rte_flow_item *item,
 917                        const void *default_mask,
 918                        void *data)
 919 {
 920         const struct rte_flow_item_vxlan *spec = item->spec;
 921         const struct rte_flow_item_vxlan *mask = item->mask;
 922         struct mlx5_flow *flow = (struct mlx5_flow *)data;
 923         struct ibv_flow_spec_tunnel *vxlan;
 924         unsigned int size = sizeof(struct ibv_flow_spec_tunnel);
 925         union vni {
 926                 uint32_t vlan_id;
 927                 uint8_t vni[4];
 928         } id;
 929
 930         ++flow->ibv_attr->num_of_specs;
 931         flow->ibv_attr->priority = 0;
 932         id.vni[0] = 0;
 933         vxlan = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
 934         *vxlan = (struct ibv_flow_spec_tunnel) {
 935                 .type = flow->inner | IBV_FLOW_SPEC_VXLAN_TUNNEL,
 936                 .size = size,
 937         };
 938         flow->inner = IBV_FLOW_SPEC_INNER;
 939         if (!spec)
 940                 return 0;
 941         if (!mask)
 942                 mask = default_mask;
 943         memcpy(&id.vni[1], spec->vni, 3);
 944         vxlan->val.tunnel_id = id.vlan_id;
 945         memcpy(&id.vni[1], mask->vni, 3);
 946         vxlan->mask.tunnel_id = id.vlan_id;
 947         /* Remove unwanted bits from values. */
 948         vxlan->val.tunnel_id &= vxlan->mask.tunnel_id;
 949         return 0;
 950 }
 951
 952 /**
 953  * Convert mark/flag action to Verbs specification.
 954  *
 955  * @param flow
 956  *   Pointer to MLX5 flow structure.
 957  * @param mark_id
 958  *   Mark identifier.
 959  */
 960 static int
 961 mlx5_flow_create_flag_mark(struct mlx5_flow *flow, uint32_t mark_id)
 962 {
 963         struct ibv_flow_spec_action_tag *tag;
 964         unsigned int size = sizeof(struct ibv_flow_spec_action_tag);
 965
 966         tag = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
 967         *tag = (struct ibv_flow_spec_action_tag){
 968                 .type = IBV_FLOW_SPEC_ACTION_TAG,
 969                 .size = size,
 970                 .tag_id = mlx5_flow_mark_set(mark_id),
 971         };
 972         ++flow->ibv_attr->num_of_specs;
 973         return 0;
 974 }
 975
 976 /**
 977  * Complete flow rule creation with a drop queue.
 978  *
 979  * @param priv
 980  *   Pointer to private structure.
 981  * @param flow
 982  *   MLX5 flow attributes (filled by mlx5_flow_validate()).
 983  * @param[out] error
 984  *   Perform verbose error reporting if not NULL.
 985  *
 986  * @return
 987  *   A flow if the rule could be created.
 988  */
 989 static struct rte_flow *
 990 priv_flow_create_action_queue_drop(struct priv *priv,
 991                                    struct mlx5_flow *flow,
 992                                    struct rte_flow_error *error)
 993 {
 994         struct rte_flow *rte_flow;
 995         struct ibv_flow_spec_action_drop *drop;
 996         unsigned int size = sizeof(struct ibv_flow_spec_action_drop);
 997
 998         assert(priv->pd);
 999         assert(priv->ctx);
1000         rte_flow = rte_calloc(__func__, 1, sizeof(*rte_flow), 0);
1001         if (!rte_flow) {
1002                 rte_flow_error_set(error, ENOMEM, RTE_FLOW_ERROR_TYPE_HANDLE,
1003                                    NULL, "cannot allocate flow memory");
1004                 return NULL;
1005         }
1006         rte_flow->drop = 1;
1007         drop = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
1008         *drop = (struct ibv_flow_spec_action_drop){
1009                         .type = IBV_FLOW_SPEC_ACTION_DROP,
1010                         .size = size,
1011         };
1012         ++flow->ibv_attr->num_of_specs;
1013         flow->offset += sizeof(struct ibv_flow_spec_action_drop);
1014         rte_flow->ibv_attr = flow->ibv_attr;
1015         if (!priv->started)
1016                 return rte_flow;
1017         rte_flow->qp = priv->flow_drop_queue->qp;
1018         rte_flow->ibv_flow = ibv_create_flow(rte_flow->qp,
1019                                              rte_flow->ibv_attr);
1020         if (!rte_flow->ibv_flow) {
1021                 rte_flow_error_set(error, ENOMEM, RTE_FLOW_ERROR_TYPE_HANDLE,
1022                                    NULL, "flow rule creation failure");
1023                 goto error;
1024         }
1025         return rte_flow;
1026 error:
1027         assert(rte_flow);
1028         rte_free(rte_flow);
1029         return NULL;
1030 }
1031
1032 /**
1033  * Complete flow rule creation.
1034  *
1035  * @param priv
1036  *   Pointer to private structure.
1037  * @param flow
1038  *   MLX5 flow attributes (filled by mlx5_flow_validate()).
1039  * @param action
1040  *   Target action structure.
1041  * @param[out] error
1042  *   Perform verbose error reporting if not NULL.
1043  *
1044  * @return
1045  *   A flow if the rule could be created.
1046  */
1047 static struct rte_flow *
1048 priv_flow_create_action_queue(struct priv *priv,
1049                               struct mlx5_flow *flow,
1050                               struct mlx5_flow_action *action,
1051                               struct rte_flow_error *error)
1052 {
1053         struct rte_flow *rte_flow;
1054         unsigned int i;
1055         unsigned int j;
1056         const unsigned int wqs_n = 1 << log2above(action->queues_n);
1057         struct ibv_wq *wqs[wqs_n];
1058
1059         assert(priv->pd);
1060         assert(priv->ctx);
1061         assert(!action->drop);
1062         rte_flow = rte_calloc(__func__, 1, sizeof(*rte_flow) +
1063                               sizeof(*rte_flow->rxqs) * action->queues_n, 0);
1064         if (!rte_flow) {
1065                 rte_flow_error_set(error, ENOMEM, RTE_FLOW_ERROR_TYPE_HANDLE,
1066                                    NULL, "cannot allocate flow memory");
1067                 return NULL;
1068         }
1069         for (i = 0; i < action->queues_n; ++i) {
1070                 struct rxq_ctrl *rxq;
1071
1072                 rxq = container_of((*priv->rxqs)[action->queues[i]],
1073                                    struct rxq_ctrl, rxq);
1074                 wqs[i] = rxq->wq;
1075                 rte_flow->rxqs[i] = &rxq->rxq;
1076                 ++rte_flow->rxqs_n;
1077                 rxq->rxq.mark |= action->mark;
1078         }
1079         /* finalise indirection table. */
1080         for (j = 0; i < wqs_n; ++i, ++j) {
1081                 wqs[i] = wqs[j];
1082                 if (j == action->queues_n)
1083                         j = 0;
1084         }
1085         rte_flow->mark = action->mark;
1086         rte_flow->ibv_attr = flow->ibv_attr;
1087         rte_flow->hash_fields = flow->hash_fields;
1088         rte_flow->ind_table = ibv_create_rwq_ind_table(
1089                 priv->ctx,
1090                 &(struct ibv_rwq_ind_table_init_attr){
1091                         .log_ind_tbl_size = log2above(action->queues_n),
1092                         .ind_tbl = wqs,
1093                         .comp_mask = 0,
1094                 });
1095         if (!rte_flow->ind_table) {
1096                 rte_flow_error_set(error, ENOMEM, RTE_FLOW_ERROR_TYPE_HANDLE,
1097                                    NULL, "cannot allocate indirection table");
1098                 goto error;
1099         }
1100         rte_flow->qp = ibv_create_qp_ex(
1101                 priv->ctx,
1102                 &(struct ibv_qp_init_attr_ex){
1103                         .qp_type = IBV_QPT_RAW_PACKET,
1104                         .comp_mask =
1105                                 IBV_QP_INIT_ATTR_PD |
1106                                 IBV_QP_INIT_ATTR_IND_TABLE |
1107                                 IBV_QP_INIT_ATTR_RX_HASH,
1108                         .rx_hash_conf = (struct ibv_rx_hash_conf){
1109                                 .rx_hash_function =
1110                                         IBV_RX_HASH_FUNC_TOEPLITZ,
1111                                 .rx_hash_key_len = rss_hash_default_key_len,
1112                                 .rx_hash_key = rss_hash_default_key,
1113                                 .rx_hash_fields_mask = rte_flow->hash_fields,
1114                         },
1115                         .rwq_ind_tbl = rte_flow->ind_table,
1116                         .pd = priv->pd
1117                 });
1118         if (!rte_flow->qp) {
1119                 rte_flow_error_set(error, ENOMEM, RTE_FLOW_ERROR_TYPE_HANDLE,
1120                                    NULL, "cannot allocate QP");
1121                 goto error;
1122         }
1123         if (!priv->started)
1124                 return rte_flow;
1125         rte_flow->ibv_flow = ibv_create_flow(rte_flow->qp,
1126                                              rte_flow->ibv_attr);
1127         if (!rte_flow->ibv_flow) {
1128                 rte_flow_error_set(error, ENOMEM, RTE_FLOW_ERROR_TYPE_HANDLE,
1129                                    NULL, "flow rule creation failure");
1130                 goto error;
1131         }
1132         return rte_flow;
1133 error:
1134         assert(rte_flow);
1135         if (rte_flow->qp)
1136                 ibv_destroy_qp(rte_flow->qp);
1137         if (rte_flow->ind_table)
1138                 ibv_destroy_rwq_ind_table(rte_flow->ind_table);
1139         rte_free(rte_flow);
1140         return NULL;
1141 }
1142
1143 /**
1144  * Convert a flow.
1145  *
1146  * @param priv
1147  *   Pointer to private structure.
1148  * @param[in] attr
1149  *   Flow rule attributes.
1150  * @param[in] pattern
1151  *   Pattern specification (list terminated by the END pattern item).
1152  * @param[in] actions
1153  *   Associated actions (list terminated by the END action).
1154  * @param[out] error
1155  *   Perform verbose error reporting if not NULL.
1156  *
1157  * @return
1158  *   A flow on success, NULL otherwise.
1159  */
1160 static struct rte_flow *
1161 priv_flow_create(struct priv *priv,
1162                  const struct rte_flow_attr *attr,
1163                  const struct rte_flow_item items[],
1164                  const struct rte_flow_action actions[],
1165                  struct rte_flow_error *error)
1166 {
1167         struct rte_flow *rte_flow;
1168         struct mlx5_flow flow = { .offset = sizeof(struct ibv_flow_attr), };
1169         struct mlx5_flow_action action = {
1170                 .queue = 0,
1171                 .drop = 0,
1172                 .mark = 0,
1173                 .mark_id = MLX5_FLOW_MARK_DEFAULT,
1174                 .queues_n = 0,
1175         };
1176         int err;
1177
1178         err = priv_flow_validate(priv, attr, items, actions, error, &flow,
1179                                  &action);
1180         if (err)
1181                 goto exit;
1182         flow.ibv_attr = rte_malloc(__func__, flow.offset, 0);
1183         flow.offset = sizeof(struct ibv_flow_attr);
1184         if (!flow.ibv_attr) {
1185                 rte_flow_error_set(error, ENOMEM, RTE_FLOW_ERROR_TYPE_HANDLE,
1186                                    NULL, "cannot allocate ibv_attr memory");
1187                 goto exit;
1188         }
1189         *flow.ibv_attr = (struct ibv_flow_attr){
1190                 .type = IBV_FLOW_ATTR_NORMAL,
1191                 .size = sizeof(struct ibv_flow_attr),
1192                 .priority = attr->priority,
1193                 .num_of_specs = 0,
1194                 .port = 0,
1195                 .flags = 0,
1196         };
1197         flow.inner = 0;
1198         flow.hash_fields = 0;
1199         claim_zero(priv_flow_validate(priv, attr, items, actions,
1200                                       error, &flow, &action));
1201         if (action.mark && !action.drop) {
1202                 mlx5_flow_create_flag_mark(&flow, action.mark_id);
1203                 flow.offset += sizeof(struct ibv_flow_spec_action_tag);
1204         }
1205         if (action.drop)
1206                 rte_flow =
1207                         priv_flow_create_action_queue_drop(priv, &flow, error);
1208         else
1209                 rte_flow = priv_flow_create_action_queue(priv, &flow, &action,
1210                                                          error);
1211         if (!rte_flow)
1212                 goto exit;
1213         return rte_flow;
1214 exit:
1215         rte_free(flow.ibv_attr);
1216         return NULL;
1217 }
1218
1219 /**
1220  * Create a flow.
1221  *
1222  * @see rte_flow_create()
1223  * @see rte_flow_ops
1224  */
1225 struct rte_flow *
1226 mlx5_flow_create(struct rte_eth_dev *dev,
1227                  const struct rte_flow_attr *attr,
1228                  const struct rte_flow_item items[],
1229                  const struct rte_flow_action actions[],
1230                  struct rte_flow_error *error)
1231 {
1232         struct priv *priv = dev->data->dev_private;
1233         struct rte_flow *flow;
1234
1235         priv_lock(priv);
1236         flow = priv_flow_create(priv, attr, items, actions, error);
1237         if (flow) {
1238                 TAILQ_INSERT_TAIL(&priv->flows, flow, next);
1239                 DEBUG("Flow created %p", (void *)flow);
1240         }
1241         priv_unlock(priv);
1242         return flow;
1243 }
1244
1245 /**
1246  * Destroy a flow.
1247  *
1248  * @param priv
1249  *   Pointer to private structure.
1250  * @param[in] flow
1251  *   Flow to destroy.
1252  */
1253 static void
1254 priv_flow_destroy(struct priv *priv,
1255                   struct rte_flow *flow)
1256 {
1257         TAILQ_REMOVE(&priv->flows, flow, next);
1258         if (flow->ibv_flow)
1259                 claim_zero(ibv_destroy_flow(flow->ibv_flow));
1260         if (flow->drop)
1261                 goto free;
1262         if (flow->qp)
1263                 claim_zero(ibv_destroy_qp(flow->qp));
1264         if (flow->ind_table)
1265                 claim_zero(ibv_destroy_rwq_ind_table(flow->ind_table));
1266         if (flow->mark) {
1267                 struct rte_flow *tmp;
1268                 struct rxq *rxq;
1269                 uint32_t mark_n = 0;
1270                 uint32_t queue_n;
1271
1272                 /*
1273                  * To remove the mark from the queue, the queue must not be
1274                  * present in any other marked flow (RSS or not).
1275                  */
1276                 for (queue_n = 0; queue_n < flow->rxqs_n; ++queue_n) {
1277                         rxq = flow->rxqs[queue_n];
1278                         for (tmp = TAILQ_FIRST(&priv->flows);
1279                              tmp;
1280                              tmp = TAILQ_NEXT(tmp, next)) {
1281                                 uint32_t tqueue_n;
1282
1283                                 if (tmp->drop)
1284                                         continue;
1285                                 for (tqueue_n = 0;
1286                                      tqueue_n < tmp->rxqs_n;
1287                                      ++tqueue_n) {
1288                                         struct rxq *trxq;
1289
1290                                         trxq = tmp->rxqs[tqueue_n];
1291                                         if (rxq == trxq)
1292                                                 ++mark_n;
1293                                 }
1294                         }
1295                         rxq->mark = !!mark_n;
1296                 }
1297         }
1298 free:
1299         rte_free(flow->ibv_attr);
1300         DEBUG("Flow destroyed %p", (void *)flow);
1301         rte_free(flow);
1302 }
1303
1304 /**
1305  * Destroy a flow.
1306  *
1307  * @see rte_flow_destroy()
1308  * @see rte_flow_ops
1309  */
1310 int
1311 mlx5_flow_destroy(struct rte_eth_dev *dev,
1312                   struct rte_flow *flow,
1313                   struct rte_flow_error *error)
1314 {
1315         struct priv *priv = dev->data->dev_private;
1316
1317         (void)error;
1318         priv_lock(priv);
1319         priv_flow_destroy(priv, flow);
1320         priv_unlock(priv);
1321         return 0;
1322 }
1323
1324 /**
1325  * Destroy all flows.
1326  *
1327  * @param priv
1328  *   Pointer to private structure.
1329  */
1330 static void
1331 priv_flow_flush(struct priv *priv)
1332 {
1333         while (!TAILQ_EMPTY(&priv->flows)) {
1334                 struct rte_flow *flow;
1335
1336                 flow = TAILQ_FIRST(&priv->flows);
1337                 priv_flow_destroy(priv, flow);
1338         }
1339 }
1340
1341 /**
1342  * Destroy all flows.
1343  *
1344  * @see rte_flow_flush()
1345  * @see rte_flow_ops
1346  */
1347 int
1348 mlx5_flow_flush(struct rte_eth_dev *dev,
1349                 struct rte_flow_error *error)
1350 {
1351         struct priv *priv = dev->data->dev_private;
1352
1353         (void)error;
1354         priv_lock(priv);
1355         priv_flow_flush(priv);
1356         priv_unlock(priv);
1357         return 0;
1358 }
1359
1360 /**
1361  * Create drop queue.
1362  *
1363  * @param priv
1364  *   Pointer to private structure.
1365  *
1366  * @return
1367  *   0 on success.
1368  */
1369 static int
1370 priv_flow_create_drop_queue(struct priv *priv)
1371 {
1372         struct rte_flow_drop *fdq = NULL;
1373
1374         assert(priv->pd);
1375         assert(priv->ctx);
1376         fdq = rte_calloc(__func__, 1, sizeof(*fdq), 0);
1377         if (!fdq) {
1378                 WARN("cannot allocate memory for drop queue");
1379                 goto error;
1380         }
1381         fdq->cq = ibv_create_cq(priv->ctx, 1, NULL, NULL, 0);
1382         if (!fdq->cq) {
1383                 WARN("cannot allocate CQ for drop queue");
1384                 goto error;
1385         }
1386         fdq->wq = ibv_create_wq(priv->ctx,
1387                         &(struct ibv_wq_init_attr){
1388                         .wq_type = IBV_WQT_RQ,
1389                         .max_wr = 1,
1390                         .max_sge = 1,
1391                         .pd = priv->pd,
1392                         .cq = fdq->cq,
1393                         });
1394         if (!fdq->wq) {
1395                 WARN("cannot allocate WQ for drop queue");
1396                 goto error;
1397         }
1398         fdq->ind_table = ibv_create_rwq_ind_table(priv->ctx,
1399                         &(struct ibv_rwq_ind_table_init_attr){
1400                         .log_ind_tbl_size = 0,
1401                         .ind_tbl = &fdq->wq,
1402                         .comp_mask = 0,
1403                         });
1404         if (!fdq->ind_table) {
1405                 WARN("cannot allocate indirection table for drop queue");
1406                 goto error;
1407         }
1408         fdq->qp = ibv_create_qp_ex(priv->ctx,
1409                 &(struct ibv_qp_init_attr_ex){
1410                         .qp_type = IBV_QPT_RAW_PACKET,
1411                         .comp_mask =
1412                                 IBV_QP_INIT_ATTR_PD |
1413                                 IBV_QP_INIT_ATTR_IND_TABLE |
1414                                 IBV_QP_INIT_ATTR_RX_HASH,
1415                         .rx_hash_conf = (struct ibv_rx_hash_conf){
1416                                 .rx_hash_function =
1417                                         IBV_RX_HASH_FUNC_TOEPLITZ,
1418                                 .rx_hash_key_len = rss_hash_default_key_len,
1419                                 .rx_hash_key = rss_hash_default_key,
1420                                 .rx_hash_fields_mask = 0,
1421                                 },
1422                         .rwq_ind_tbl = fdq->ind_table,
1423                         .pd = priv->pd
1424                 });
1425         if (!fdq->qp) {
1426                 WARN("cannot allocate QP for drop queue");
1427                 goto error;
1428         }
1429         priv->flow_drop_queue = fdq;
1430         return 0;
1431 error:
1432         if (fdq->qp)
1433                 claim_zero(ibv_destroy_qp(fdq->qp));
1434         if (fdq->ind_table)
1435                 claim_zero(ibv_destroy_rwq_ind_table(fdq->ind_table));
1436         if (fdq->wq)
1437                 claim_zero(ibv_destroy_wq(fdq->wq));
1438         if (fdq->cq)
1439                 claim_zero(ibv_destroy_cq(fdq->cq));
1440         if (fdq)
1441                 rte_free(fdq);
1442         priv->flow_drop_queue = NULL;
1443         return -1;
1444 }
1445
1446 /**
1447  * Delete drop queue.
1448  *
1449  * @param priv
1450  *   Pointer to private structure.
1451  */
1452 static void
1453 priv_flow_delete_drop_queue(struct priv *priv)
1454 {
1455         struct rte_flow_drop *fdq = priv->flow_drop_queue;
1456
1457         if (!fdq)
1458                 return;
1459         if (fdq->qp)
1460                 claim_zero(ibv_destroy_qp(fdq->qp));
1461         if (fdq->ind_table)
1462                 claim_zero(ibv_destroy_rwq_ind_table(fdq->ind_table));
1463         if (fdq->wq)
1464                 claim_zero(ibv_destroy_wq(fdq->wq));
1465         if (fdq->cq)
1466                 claim_zero(ibv_destroy_cq(fdq->cq));
1467         rte_free(fdq);
1468         priv->flow_drop_queue = NULL;
1469 }
1470
1471 /**
1472  * Remove all flows.
1473  *
1474  * Called by dev_stop() to remove all flows.
1475  *
1476  * @param priv
1477  *   Pointer to private structure.
1478  */
1479 void
1480 priv_flow_stop(struct priv *priv)
1481 {
1482         struct rte_flow *flow;
1483
1484         TAILQ_FOREACH_REVERSE(flow, &priv->flows, mlx5_flows, next) {
1485                 claim_zero(ibv_destroy_flow(flow->ibv_flow));
1486                 flow->ibv_flow = NULL;
1487                 if (flow->mark) {
1488                         unsigned int n;
1489
1490                         for (n = 0; n < flow->rxqs_n; ++n)
1491                                 flow->rxqs[n]->mark = 0;
1492                 }
1493                 DEBUG("Flow %p removed", (void *)flow);
1494         }
1495         priv_flow_delete_drop_queue(priv);
1496 }
1497
1498 /**
1499  * Add all flows.
1500  *
1501  * @param priv
1502  *   Pointer to private structure.
1503  *
1504  * @return
1505  *   0 on success, a errno value otherwise and rte_errno is set.
1506  */
1507 int
1508 priv_flow_start(struct priv *priv)
1509 {
1510         int ret;
1511         struct rte_flow *flow;
1512
1513         ret = priv_flow_create_drop_queue(priv);
1514         if (ret)
1515                 return -1;
1516         TAILQ_FOREACH(flow, &priv->flows, next) {
1517                 struct ibv_qp *qp;
1518
1519                 if (flow->drop)
1520                         qp = priv->flow_drop_queue->qp;
1521                 else
1522                         qp = flow->qp;
1523                 flow->ibv_flow = ibv_create_flow(qp, flow->ibv_attr);
1524                 if (!flow->ibv_flow) {
1525                         DEBUG("Flow %p cannot be applied", (void *)flow);
1526                         rte_errno = EINVAL;
1527                         return rte_errno;
1528                 }
1529                 DEBUG("Flow %p applied", (void *)flow);
1530                 if (flow->mark) {
1531                         unsigned int n;
1532
1533                         for (n = 0; n < flow->rxqs_n; ++n)
1534                                 flow->rxqs[n]->mark = 1;
1535                 }
1536         }
1537         return 0;
1538 }
1539
1540 /**
1541  * Verify if the Rx queue is used in a flow.
1542  *
1543  * @param priv
1544  *   Pointer to private structure.
1545  * @param rxq
1546  *   Pointer to the queue to search.
1547  *
1548  * @return
1549  *   Nonzero if the queue is used by a flow.
1550  */
1551 int
1552 priv_flow_rxq_in_use(struct priv *priv, struct rxq *rxq)
1553 {
1554         struct rte_flow *flow;
1555
1556         for (flow = TAILQ_FIRST(&priv->flows);
1557              flow;
1558              flow = TAILQ_NEXT(flow, next)) {
1559                 unsigned int n;
1560
1561                 if (flow->drop)
1562                         continue;
1563                 for (n = 0; n < flow->rxqs_n; ++n) {
1564                         if (flow->rxqs[n] == rxq)
1565                                 return 1;
1566                 }
1567         }
1568         return 0;
1569 }
1570
1571 /**
1572  * Isolated mode.
1573  *
1574  * @see rte_flow_isolate()
1575  * @see rte_flow_ops
1576  */
1577 int
1578 mlx5_flow_isolate(struct rte_eth_dev *dev,
1579                   int enable,
1580                   struct rte_flow_error *error)
1581 {
1582         struct priv *priv = dev->data->dev_private;
1583
1584         priv_lock(priv);
1585         if (priv->started) {
1586                 rte_flow_error_set(error, EBUSY,
1587                                    RTE_FLOW_ERROR_TYPE_UNSPECIFIED,
1588                                    NULL,
1589                                    "port must be stopped first");
1590                 priv_unlock(priv);
1591                 return -rte_errno;
1592         }
1593         priv->isolated = !!enable;
1594         priv_unlock(priv);
1595         return 0;
1596 }