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 /* Number of Work Queue necessary for the DROP queue. */
  56 #define MLX5_DROP_WQ_N 4
  57
  58 static int
  59 mlx5_flow_create_eth(const struct rte_flow_item *item,
  60                      const void *default_mask,
  61                      void *data);
  62
  63 static int
  64 mlx5_flow_create_vlan(const struct rte_flow_item *item,
  65                       const void *default_mask,
  66                       void *data);
  67
  68 static int
  69 mlx5_flow_create_ipv4(const struct rte_flow_item *item,
  70                       const void *default_mask,
  71                       void *data);
  72
  73 static int
  74 mlx5_flow_create_ipv6(const struct rte_flow_item *item,
  75                       const void *default_mask,
  76                       void *data);
  77
  78 static int
  79 mlx5_flow_create_udp(const struct rte_flow_item *item,
  80                      const void *default_mask,
  81                      void *data);
  82
  83 static int
  84 mlx5_flow_create_tcp(const struct rte_flow_item *item,
  85                      const void *default_mask,
  86                      void *data);
  87
  88 static int
  89 mlx5_flow_create_vxlan(const struct rte_flow_item *item,
  90                        const void *default_mask,
  91                        void *data);
  92
  93 struct rte_flow {
  94         LIST_ENTRY(rte_flow) next; /**< Pointer to the next flow structure. */
  95         struct ibv_exp_flow_attr *ibv_attr; /**< Pointer to Verbs attributes. */
  96         struct ibv_exp_rwq_ind_table *ind_table; /**< Indirection table. */
  97         struct ibv_qp *qp; /**< Verbs queue pair. */
  98         struct ibv_exp_flow *ibv_flow; /**< Verbs flow. */
  99         struct ibv_exp_wq *wq; /**< Verbs work queue. */
 100         struct ibv_cq *cq; /**< Verbs completion queue. */
 101         uint16_t rxqs_n; /**< Number of queues in this flow, 0 if drop queue. */
 102         uint32_t mark:1; /**< Set if the flow is marked. */
 103         uint32_t drop:1; /**< Drop queue. */
 104         uint64_t hash_fields; /**< Fields that participate in the hash. */
 105         struct rxq *rxqs[]; /**< Pointer to the queues array. */
 106 };
 107
 108 /** Static initializer for items. */
 109 #define ITEMS(...) \
 110         (const enum rte_flow_item_type []){ \
 111                 __VA_ARGS__, RTE_FLOW_ITEM_TYPE_END, \
 112         }
 113
 114 /** Structure to generate a simple graph of layers supported by the NIC. */
 115 struct mlx5_flow_items {
 116         /** List of possible actions for these items. */
 117         const enum rte_flow_action_type *const actions;
 118         /** Bit-masks corresponding to the possibilities for the item. */
 119         const void *mask;
 120         /**
 121          * Default bit-masks to use when item->mask is not provided. When
 122          * \default_mask is also NULL, the full supported bit-mask (\mask) is
 123          * used instead.
 124          */
 125         const void *default_mask;
 126         /** Bit-masks size in bytes. */
 127         const unsigned int mask_sz;
 128         /**
 129          * Conversion function from rte_flow to NIC specific flow.
 130          *
 131          * @param item
 132          *   rte_flow item to convert.
 133          * @param default_mask
 134          *   Default bit-masks to use when item->mask is not provided.
 135          * @param data
 136          *   Internal structure to store the conversion.
 137          *
 138          * @return
 139          *   0 on success, negative value otherwise.
 140          */
 141         int (*convert)(const struct rte_flow_item *item,
 142                        const void *default_mask,
 143                        void *data);
 144         /** Size in bytes of the destination structure. */
 145         const unsigned int dst_sz;
 146         /** List of possible following items.  */
 147         const enum rte_flow_item_type *const items;
 148 };
 149
 150 /** Valid action for this PMD. */
 151 static const enum rte_flow_action_type valid_actions[] = {
 152         RTE_FLOW_ACTION_TYPE_DROP,
 153         RTE_FLOW_ACTION_TYPE_QUEUE,
 154         RTE_FLOW_ACTION_TYPE_MARK,
 155         RTE_FLOW_ACTION_TYPE_FLAG,
 156         RTE_FLOW_ACTION_TYPE_END,
 157 };
 158
 159 /** Graph of supported items and associated actions. */
 160 static const struct mlx5_flow_items mlx5_flow_items[] = {
 161         [RTE_FLOW_ITEM_TYPE_END] = {
 162                 .items = ITEMS(RTE_FLOW_ITEM_TYPE_ETH,
 163                                RTE_FLOW_ITEM_TYPE_VXLAN),
 164         },
 165         [RTE_FLOW_ITEM_TYPE_ETH] = {
 166                 .items = ITEMS(RTE_FLOW_ITEM_TYPE_VLAN,
 167                                RTE_FLOW_ITEM_TYPE_IPV4,
 168                                RTE_FLOW_ITEM_TYPE_IPV6),
 169                 .actions = valid_actions,
 170                 .mask = &(const struct rte_flow_item_eth){
 171                         .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 172                         .src.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 173                         .type = -1,
 174                 },
 175                 .default_mask = &rte_flow_item_eth_mask,
 176                 .mask_sz = sizeof(struct rte_flow_item_eth),
 177                 .convert = mlx5_flow_create_eth,
 178                 .dst_sz = sizeof(struct ibv_exp_flow_spec_eth),
 179         },
 180         [RTE_FLOW_ITEM_TYPE_VLAN] = {
 181                 .items = ITEMS(RTE_FLOW_ITEM_TYPE_IPV4,
 182                                RTE_FLOW_ITEM_TYPE_IPV6),
 183                 .actions = valid_actions,
 184                 .mask = &(const struct rte_flow_item_vlan){
 185                         .tci = -1,
 186                 },
 187                 .default_mask = &rte_flow_item_vlan_mask,
 188                 .mask_sz = sizeof(struct rte_flow_item_vlan),
 189                 .convert = mlx5_flow_create_vlan,
 190                 .dst_sz = 0,
 191         },
 192         [RTE_FLOW_ITEM_TYPE_IPV4] = {
 193                 .items = ITEMS(RTE_FLOW_ITEM_TYPE_UDP,
 194                                RTE_FLOW_ITEM_TYPE_TCP),
 195                 .actions = valid_actions,
 196                 .mask = &(const struct rte_flow_item_ipv4){
 197                         .hdr = {
 198                                 .src_addr = -1,
 199                                 .dst_addr = -1,
 200                                 .type_of_service = -1,
 201                                 .next_proto_id = -1,
 202                         },
 203                 },
 204                 .default_mask = &rte_flow_item_ipv4_mask,
 205                 .mask_sz = sizeof(struct rte_flow_item_ipv4),
 206                 .convert = mlx5_flow_create_ipv4,
 207                 .dst_sz = sizeof(struct ibv_exp_flow_spec_ipv4_ext),
 208         },
 209         [RTE_FLOW_ITEM_TYPE_IPV6] = {
 210                 .items = ITEMS(RTE_FLOW_ITEM_TYPE_UDP,
 211                                RTE_FLOW_ITEM_TYPE_TCP),
 212                 .actions = valid_actions,
 213                 .mask = &(const struct rte_flow_item_ipv6){
 214                         .hdr = {
 215                                 .src_addr = {
 216                                         0xff, 0xff, 0xff, 0xff,
 217                                         0xff, 0xff, 0xff, 0xff,
 218                                         0xff, 0xff, 0xff, 0xff,
 219                                         0xff, 0xff, 0xff, 0xff,
 220                                 },
 221                                 .dst_addr = {
 222                                         0xff, 0xff, 0xff, 0xff,
 223                                         0xff, 0xff, 0xff, 0xff,
 224                                         0xff, 0xff, 0xff, 0xff,
 225                                         0xff, 0xff, 0xff, 0xff,
 226                                 },
 227                                 .vtc_flow = -1,
 228                                 .proto = -1,
 229                                 .hop_limits = -1,
 230                         },
 231                 },
 232                 .default_mask = &rte_flow_item_ipv6_mask,
 233                 .mask_sz = sizeof(struct rte_flow_item_ipv6),
 234                 .convert = mlx5_flow_create_ipv6,
 235                 .dst_sz = sizeof(struct ibv_exp_flow_spec_ipv6_ext),
 236         },
 237         [RTE_FLOW_ITEM_TYPE_UDP] = {
 238                 .items = ITEMS(RTE_FLOW_ITEM_TYPE_VXLAN),
 239                 .actions = valid_actions,
 240                 .mask = &(const struct rte_flow_item_udp){
 241                         .hdr = {
 242                                 .src_port = -1,
 243                                 .dst_port = -1,
 244                         },
 245                 },
 246                 .default_mask = &rte_flow_item_udp_mask,
 247                 .mask_sz = sizeof(struct rte_flow_item_udp),
 248                 .convert = mlx5_flow_create_udp,
 249                 .dst_sz = sizeof(struct ibv_exp_flow_spec_tcp_udp),
 250         },
 251         [RTE_FLOW_ITEM_TYPE_TCP] = {
 252                 .actions = valid_actions,
 253                 .mask = &(const struct rte_flow_item_tcp){
 254                         .hdr = {
 255                                 .src_port = -1,
 256                                 .dst_port = -1,
 257                         },
 258                 },
 259                 .default_mask = &rte_flow_item_tcp_mask,
 260                 .mask_sz = sizeof(struct rte_flow_item_tcp),
 261                 .convert = mlx5_flow_create_tcp,
 262                 .dst_sz = sizeof(struct ibv_exp_flow_spec_tcp_udp),
 263         },
 264         [RTE_FLOW_ITEM_TYPE_VXLAN] = {
 265                 .items = ITEMS(RTE_FLOW_ITEM_TYPE_ETH),
 266                 .actions = valid_actions,
 267                 .mask = &(const struct rte_flow_item_vxlan){
 268                         .vni = "\xff\xff\xff",
 269                 },
 270                 .default_mask = &rte_flow_item_vxlan_mask,
 271                 .mask_sz = sizeof(struct rte_flow_item_vxlan),
 272                 .convert = mlx5_flow_create_vxlan,
 273                 .dst_sz = sizeof(struct ibv_exp_flow_spec_tunnel),
 274         },
 275 };
 276
 277 /** Structure to pass to the conversion function. */
 278 struct mlx5_flow {
 279         struct ibv_exp_flow_attr *ibv_attr; /**< Verbs attribute. */
 280         unsigned int offset; /**< Offset in bytes in the ibv_attr buffer. */
 281         uint32_t inner; /**< Set once VXLAN is encountered. */
 282         uint64_t hash_fields; /**< Fields that participate in the hash. */
 283 };
 284
 285 /** Structure for Drop queue. */
 286 struct rte_flow_drop {
 287         struct ibv_exp_rwq_ind_table *ind_table; /**< Indirection table. */
 288         struct ibv_qp *qp; /**< Verbs queue pair. */
 289         struct ibv_exp_wq *wqs[MLX5_DROP_WQ_N]; /**< Verbs work queue. */
 290         struct ibv_cq *cq; /**< Verbs completion queue. */
 291 };
 292
 293 struct mlx5_flow_action {
 294         uint32_t queue:1; /**< Target is a receive queue. */
 295         uint32_t drop:1; /**< Target is a drop queue. */
 296         uint32_t mark:1; /**< Mark is present in the flow. */
 297         uint32_t mark_id; /**< Mark identifier. */
 298         uint16_t queues[RTE_MAX_QUEUES_PER_PORT]; /**< Queues indexes to use. */
 299         uint16_t queues_n; /**< Number of entries in queue[]. */
 300 };
 301
 302 /**
 303  * Check support for a given item.
 304  *
 305  * @param item[in]
 306  *   Item specification.
 307  * @param mask[in]
 308  *   Bit-masks covering supported fields to compare with spec, last and mask in
 309  *   \item.
 310  * @param size
 311  *   Bit-Mask size in bytes.
 312  *
 313  * @return
 314  *   0 on success.
 315  */
 316 static int
 317 mlx5_flow_item_validate(const struct rte_flow_item *item,
 318                         const uint8_t *mask, unsigned int size)
 319 {
 320         int ret = 0;
 321
 322         if (!item->spec && (item->mask || item->last))
 323                 return -1;
 324         if (item->spec && !item->mask) {
 325                 unsigned int i;
 326                 const uint8_t *spec = item->spec;
 327
 328                 for (i = 0; i < size; ++i)
 329                         if ((spec[i] | mask[i]) != mask[i])
 330                                 return -1;
 331         }
 332         if (item->last && !item->mask) {
 333                 unsigned int i;
 334                 const uint8_t *spec = item->last;
 335
 336                 for (i = 0; i < size; ++i)
 337                         if ((spec[i] | mask[i]) != mask[i])
 338                                 return -1;
 339         }
 340         if (item->mask) {
 341                 unsigned int i;
 342                 const uint8_t *spec = item->mask;
 343
 344                 for (i = 0; i < size; ++i)
 345                         if ((spec[i] | mask[i]) != mask[i])
 346                                 return -1;
 347         }
 348         if (item->spec && item->last) {
 349                 uint8_t spec[size];
 350                 uint8_t last[size];
 351                 const uint8_t *apply = mask;
 352                 unsigned int i;
 353
 354                 if (item->mask)
 355                         apply = item->mask;
 356                 for (i = 0; i < size; ++i) {
 357                         spec[i] = ((const uint8_t *)item->spec)[i] & apply[i];
 358                         last[i] = ((const uint8_t *)item->last)[i] & apply[i];
 359                 }
 360                 ret = memcmp(spec, last, size);
 361         }
 362         return ret;
 363 }
 364
 365 /**
 366  * Validate a flow supported by the NIC.
 367  *
 368  * @param priv
 369  *   Pointer to private structure.
 370  * @param[in] attr
 371  *   Flow rule attributes.
 372  * @param[in] pattern
 373  *   Pattern specification (list terminated by the END pattern item).
 374  * @param[in] actions
 375  *   Associated actions (list terminated by the END action).
 376  * @param[out] error
 377  *   Perform verbose error reporting if not NULL.
 378  * @param[in, out] flow
 379  *   Flow structure to update.
 380  * @param[in, out] action
 381  *   Action structure to update.
 382  *
 383  * @return
 384  *   0 on success, a negative errno value otherwise and rte_errno is set.
 385  */
 386 static int
 387 priv_flow_validate(struct priv *priv,
 388                    const struct rte_flow_attr *attr,
 389                    const struct rte_flow_item items[],
 390                    const struct rte_flow_action actions[],
 391                    struct rte_flow_error *error,
 392                    struct mlx5_flow *flow,
 393                    struct mlx5_flow_action *action)
 394 {
 395         const struct mlx5_flow_items *cur_item = mlx5_flow_items;
 396
 397         (void)priv;
 398         if (attr->group) {
 399                 rte_flow_error_set(error, ENOTSUP,
 400                                    RTE_FLOW_ERROR_TYPE_ATTR_GROUP,
 401                                    NULL,
 402                                    "groups are not supported");
 403                 return -rte_errno;
 404         }
 405         if (attr->priority) {
 406                 rte_flow_error_set(error, ENOTSUP,
 407                                    RTE_FLOW_ERROR_TYPE_ATTR_PRIORITY,
 408                                    NULL,
 409                                    "priorities are not supported");
 410                 return -rte_errno;
 411         }
 412         if (attr->egress) {
 413                 rte_flow_error_set(error, ENOTSUP,
 414                                    RTE_FLOW_ERROR_TYPE_ATTR_EGRESS,
 415                                    NULL,
 416                                    "egress is not supported");
 417                 return -rte_errno;
 418         }
 419         if (!attr->ingress) {
 420                 rte_flow_error_set(error, ENOTSUP,
 421                                    RTE_FLOW_ERROR_TYPE_ATTR_INGRESS,
 422                                    NULL,
 423                                    "only ingress is supported");
 424                 return -rte_errno;
 425         }
 426         for (; items->type != RTE_FLOW_ITEM_TYPE_END; ++items) {
 427                 const struct mlx5_flow_items *token = NULL;
 428                 unsigned int i;
 429                 int err;
 430
 431                 if (items->type == RTE_FLOW_ITEM_TYPE_VOID)
 432                         continue;
 433                 for (i = 0;
 434                      cur_item->items &&
 435                      cur_item->items[i] != RTE_FLOW_ITEM_TYPE_END;
 436                      ++i) {
 437                         if (cur_item->items[i] == items->type) {
 438                                 token = &mlx5_flow_items[items->type];
 439                                 break;
 440                         }
 441                 }
 442                 if (!token)
 443                         goto exit_item_not_supported;
 444                 cur_item = token;
 445                 err = mlx5_flow_item_validate(items,
 446                                               (const uint8_t *)cur_item->mask,
 447                                               cur_item->mask_sz);
 448                 if (err)
 449                         goto exit_item_not_supported;
 450                 if (flow->ibv_attr && cur_item->convert) {
 451                         err = cur_item->convert(items,
 452                                                 (cur_item->default_mask ?
 453                                                  cur_item->default_mask :
 454                                                  cur_item->mask),
 455                                                 flow);
 456                         if (err)
 457                                 goto exit_item_not_supported;
 458                 } else if (items->type == RTE_FLOW_ITEM_TYPE_VXLAN) {
 459                         if (flow->inner) {
 460                                 rte_flow_error_set(error, ENOTSUP,
 461                                                    RTE_FLOW_ERROR_TYPE_ITEM,
 462                                                    items,
 463                                                    "cannot recognize multiple"
 464                                                    " VXLAN encapsulations");
 465                                 return -rte_errno;
 466                         }
 467                         flow->inner = 1;
 468                 }
 469                 flow->offset += cur_item->dst_sz;
 470         }
 471         for (; actions->type != RTE_FLOW_ACTION_TYPE_END; ++actions) {
 472                 if (actions->type == RTE_FLOW_ACTION_TYPE_VOID) {
 473                         continue;
 474                 } else if (actions->type == RTE_FLOW_ACTION_TYPE_DROP) {
 475                         action->drop = 1;
 476                 } else if (actions->type == RTE_FLOW_ACTION_TYPE_QUEUE) {
 477                         const struct rte_flow_action_queue *queue =
 478                                 (const struct rte_flow_action_queue *)
 479                                 actions->conf;
 480                         uint16_t n;
 481                         uint16_t found = 0;
 482
 483                         if (!queue || (queue->index > (priv->rxqs_n - 1)))
 484                                 goto exit_action_not_supported;
 485                         for (n = 0; n < action->queues_n; ++n) {
 486                                 if (action->queues[n] == queue->index) {
 487                                         found = 1;
 488                                         break;
 489                                 }
 490                         }
 491                         if (action->queues_n > 1 && !found) {
 492                                 rte_flow_error_set(error, ENOTSUP,
 493                                            RTE_FLOW_ERROR_TYPE_ACTION,
 494                                            actions,
 495                                            "queue action not in RSS queues");
 496                                 return -rte_errno;
 497                         }
 498                         if (!found) {
 499                                 action->queue = 1;
 500                                 action->queues_n = 1;
 501                                 action->queues[0] = queue->index;
 502                         }
 503                 } else if (actions->type == RTE_FLOW_ACTION_TYPE_RSS) {
 504                         const struct rte_flow_action_rss *rss =
 505                                 (const struct rte_flow_action_rss *)
 506                                 actions->conf;
 507                         uint16_t n;
 508
 509                         if (!rss || !rss->num) {
 510                                 rte_flow_error_set(error, EINVAL,
 511                                                    RTE_FLOW_ERROR_TYPE_ACTION,
 512                                                    actions,
 513                                                    "no valid queues");
 514                                 return -rte_errno;
 515                         }
 516                         if (action->queues_n == 1) {
 517                                 uint16_t found = 0;
 518
 519                                 assert(action->queues_n);
 520                                 for (n = 0; n < rss->num; ++n) {
 521                                         if (action->queues[0] ==
 522                                             rss->queue[n]) {
 523                                                 found = 1;
 524                                                 break;
 525                                         }
 526                                 }
 527                                 if (!found) {
 528                                         rte_flow_error_set(error, ENOTSUP,
 529                                                    RTE_FLOW_ERROR_TYPE_ACTION,
 530                                                    actions,
 531                                                    "queue action not in RSS"
 532                                                    " queues");
 533                                         return -rte_errno;
 534                                 }
 535                         }
 536                         for (n = 0; n < rss->num; ++n) {
 537                                 if (rss->queue[n] >= priv->rxqs_n) {
 538                                         rte_flow_error_set(error, EINVAL,
 539                                                    RTE_FLOW_ERROR_TYPE_ACTION,
 540                                                    actions,
 541                                                    "queue id > number of"
 542                                                    " queues");
 543                                         return -rte_errno;
 544                                 }
 545                         }
 546                         action->queue = 1;
 547                         for (n = 0; n < rss->num; ++n)
 548                                 action->queues[n] = rss->queue[n];
 549                         action->queues_n = rss->num;
 550                 } else if (actions->type == RTE_FLOW_ACTION_TYPE_MARK) {
 551                         const struct rte_flow_action_mark *mark =
 552                                 (const struct rte_flow_action_mark *)
 553                                 actions->conf;
 554
 555                         if (!mark) {
 556                                 rte_flow_error_set(error, EINVAL,
 557                                                    RTE_FLOW_ERROR_TYPE_ACTION,
 558                                                    actions,
 559                                                    "mark must be defined");
 560                                 return -rte_errno;
 561                         } else if (mark->id >= MLX5_FLOW_MARK_MAX) {
 562                                 rte_flow_error_set(error, ENOTSUP,
 563                                                    RTE_FLOW_ERROR_TYPE_ACTION,
 564                                                    actions,
 565                                                    "mark must be between 0"
 566                                                    " and 16777199");
 567                                 return -rte_errno;
 568                         }
 569                         action->mark = 1;
 570                         action->mark_id = mark->id;
 571                 } else if (actions->type == RTE_FLOW_ACTION_TYPE_FLAG) {
 572                         action->mark = 1;
 573                 } else {
 574                         goto exit_action_not_supported;
 575                 }
 576         }
 577         if (action->mark && !flow->ibv_attr && !action->drop)
 578                 flow->offset += sizeof(struct ibv_exp_flow_spec_action_tag);
 579         if (!action->queue && !action->drop) {
 580                 rte_flow_error_set(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_HANDLE,
 581                                    NULL, "no valid action");
 582                 return -rte_errno;
 583         }
 584         return 0;
 585 exit_item_not_supported:
 586         rte_flow_error_set(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ITEM,
 587                            items, "item not supported");
 588         return -rte_errno;
 589 exit_action_not_supported:
 590         rte_flow_error_set(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ACTION,
 591                            actions, "action not supported");
 592         return -rte_errno;
 593 }
 594
 595 /**
 596  * Validate a flow supported by the NIC.
 597  *
 598  * @see rte_flow_validate()
 599  * @see rte_flow_ops
 600  */
 601 int
 602 mlx5_flow_validate(struct rte_eth_dev *dev,
 603                    const struct rte_flow_attr *attr,
 604                    const struct rte_flow_item items[],
 605                    const struct rte_flow_action actions[],
 606                    struct rte_flow_error *error)
 607 {
 608         struct priv *priv = dev->data->dev_private;
 609         int ret;
 610         struct mlx5_flow flow = { .offset = sizeof(struct ibv_exp_flow_attr) };
 611         struct mlx5_flow_action action = {
 612                 .queue = 0,
 613                 .drop = 0,
 614                 .mark = 0,
 615                 .mark_id = MLX5_FLOW_MARK_DEFAULT,
 616                 .queues_n = 0,
 617         };
 618
 619         priv_lock(priv);
 620         ret = priv_flow_validate(priv, attr, items, actions, error, &flow,
 621                                  &action);
 622         priv_unlock(priv);
 623         return ret;
 624 }
 625
 626 /**
 627  * Convert Ethernet item to Verbs specification.
 628  *
 629  * @param item[in]
 630  *   Item specification.
 631  * @param default_mask[in]
 632  *   Default bit-masks to use when item->mask is not provided.
 633  * @param data[in, out]
 634  *   User structure.
 635  */
 636 static int
 637 mlx5_flow_create_eth(const struct rte_flow_item *item,
 638                      const void *default_mask,
 639                      void *data)
 640 {
 641         const struct rte_flow_item_eth *spec = item->spec;
 642         const struct rte_flow_item_eth *mask = item->mask;
 643         struct mlx5_flow *flow = (struct mlx5_flow *)data;
 644         struct ibv_exp_flow_spec_eth *eth;
 645         const unsigned int eth_size = sizeof(struct ibv_exp_flow_spec_eth);
 646         unsigned int i;
 647
 648         ++flow->ibv_attr->num_of_specs;
 649         flow->ibv_attr->priority = 2;
 650         flow->hash_fields = 0;
 651         eth = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
 652         *eth = (struct ibv_exp_flow_spec_eth) {
 653                 .type = flow->inner | IBV_EXP_FLOW_SPEC_ETH,
 654                 .size = eth_size,
 655         };
 656         if (!spec)
 657                 return 0;
 658         if (!mask)
 659                 mask = default_mask;
 660         memcpy(eth->val.dst_mac, spec->dst.addr_bytes, ETHER_ADDR_LEN);
 661         memcpy(eth->val.src_mac, spec->src.addr_bytes, ETHER_ADDR_LEN);
 662         eth->val.ether_type = spec->type;
 663         memcpy(eth->mask.dst_mac, mask->dst.addr_bytes, ETHER_ADDR_LEN);
 664         memcpy(eth->mask.src_mac, mask->src.addr_bytes, ETHER_ADDR_LEN);
 665         eth->mask.ether_type = mask->type;
 666         /* Remove unwanted bits from values. */
 667         for (i = 0; i < ETHER_ADDR_LEN; ++i) {
 668                 eth->val.dst_mac[i] &= eth->mask.dst_mac[i];
 669                 eth->val.src_mac[i] &= eth->mask.src_mac[i];
 670         }
 671         eth->val.ether_type &= eth->mask.ether_type;
 672         return 0;
 673 }
 674
 675 /**
 676  * Convert VLAN item to Verbs specification.
 677  *
 678  * @param item[in]
 679  *   Item specification.
 680  * @param default_mask[in]
 681  *   Default bit-masks to use when item->mask is not provided.
 682  * @param data[in, out]
 683  *   User structure.
 684  */
 685 static int
 686 mlx5_flow_create_vlan(const struct rte_flow_item *item,
 687                       const void *default_mask,
 688                       void *data)
 689 {
 690         const struct rte_flow_item_vlan *spec = item->spec;
 691         const struct rte_flow_item_vlan *mask = item->mask;
 692         struct mlx5_flow *flow = (struct mlx5_flow *)data;
 693         struct ibv_exp_flow_spec_eth *eth;
 694         const unsigned int eth_size = sizeof(struct ibv_exp_flow_spec_eth);
 695
 696         eth = (void *)((uintptr_t)flow->ibv_attr + flow->offset - eth_size);
 697         if (!spec)
 698                 return 0;
 699         if (!mask)
 700                 mask = default_mask;
 701         eth->val.vlan_tag = spec->tci;
 702         eth->mask.vlan_tag = mask->tci;
 703         eth->val.vlan_tag &= eth->mask.vlan_tag;
 704         return 0;
 705 }
 706
 707 /**
 708  * Convert IPv4 item to Verbs specification.
 709  *
 710  * @param item[in]
 711  *   Item specification.
 712  * @param default_mask[in]
 713  *   Default bit-masks to use when item->mask is not provided.
 714  * @param data[in, out]
 715  *   User structure.
 716  */
 717 static int
 718 mlx5_flow_create_ipv4(const struct rte_flow_item *item,
 719                       const void *default_mask,
 720                       void *data)
 721 {
 722         const struct rte_flow_item_ipv4 *spec = item->spec;
 723         const struct rte_flow_item_ipv4 *mask = item->mask;
 724         struct mlx5_flow *flow = (struct mlx5_flow *)data;
 725         struct ibv_exp_flow_spec_ipv4_ext *ipv4;
 726         unsigned int ipv4_size = sizeof(struct ibv_exp_flow_spec_ipv4_ext);
 727
 728         ++flow->ibv_attr->num_of_specs;
 729         flow->ibv_attr->priority = 1;
 730         flow->hash_fields = (IBV_EXP_RX_HASH_SRC_IPV4 |
 731                              IBV_EXP_RX_HASH_DST_IPV4);
 732         ipv4 = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
 733         *ipv4 = (struct ibv_exp_flow_spec_ipv4_ext) {
 734                 .type = flow->inner | IBV_EXP_FLOW_SPEC_IPV4_EXT,
 735                 .size = ipv4_size,
 736         };
 737         if (!spec)
 738                 return 0;
 739         if (!mask)
 740                 mask = default_mask;
 741         ipv4->val = (struct ibv_exp_flow_ipv4_ext_filter){
 742                 .src_ip = spec->hdr.src_addr,
 743                 .dst_ip = spec->hdr.dst_addr,
 744                 .proto = spec->hdr.next_proto_id,
 745                 .tos = spec->hdr.type_of_service,
 746         };
 747         ipv4->mask = (struct ibv_exp_flow_ipv4_ext_filter){
 748                 .src_ip = mask->hdr.src_addr,
 749                 .dst_ip = mask->hdr.dst_addr,
 750                 .proto = mask->hdr.next_proto_id,
 751                 .tos = mask->hdr.type_of_service,
 752         };
 753         /* Remove unwanted bits from values. */
 754         ipv4->val.src_ip &= ipv4->mask.src_ip;
 755         ipv4->val.dst_ip &= ipv4->mask.dst_ip;
 756         ipv4->val.proto &= ipv4->mask.proto;
 757         ipv4->val.tos &= ipv4->mask.tos;
 758         return 0;
 759 }
 760
 761 /**
 762  * Convert IPv6 item to Verbs specification.
 763  *
 764  * @param item[in]
 765  *   Item specification.
 766  * @param default_mask[in]
 767  *   Default bit-masks to use when item->mask is not provided.
 768  * @param data[in, out]
 769  *   User structure.
 770  */
 771 static int
 772 mlx5_flow_create_ipv6(const struct rte_flow_item *item,
 773                       const void *default_mask,
 774                       void *data)
 775 {
 776         const struct rte_flow_item_ipv6 *spec = item->spec;
 777         const struct rte_flow_item_ipv6 *mask = item->mask;
 778         struct mlx5_flow *flow = (struct mlx5_flow *)data;
 779         struct ibv_exp_flow_spec_ipv6_ext *ipv6;
 780         unsigned int ipv6_size = sizeof(struct ibv_exp_flow_spec_ipv6_ext);
 781         unsigned int i;
 782
 783         ++flow->ibv_attr->num_of_specs;
 784         flow->ibv_attr->priority = 1;
 785         flow->hash_fields = (IBV_EXP_RX_HASH_SRC_IPV6 |
 786                              IBV_EXP_RX_HASH_DST_IPV6);
 787         ipv6 = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
 788         *ipv6 = (struct ibv_exp_flow_spec_ipv6_ext) {
 789                 .type = flow->inner | IBV_EXP_FLOW_SPEC_IPV6_EXT,
 790                 .size = ipv6_size,
 791         };
 792         if (!spec)
 793                 return 0;
 794         if (!mask)
 795                 mask = default_mask;
 796         memcpy(ipv6->val.src_ip, spec->hdr.src_addr,
 797                RTE_DIM(ipv6->val.src_ip));
 798         memcpy(ipv6->val.dst_ip, spec->hdr.dst_addr,
 799                RTE_DIM(ipv6->val.dst_ip));
 800         memcpy(ipv6->mask.src_ip, mask->hdr.src_addr,
 801                RTE_DIM(ipv6->mask.src_ip));
 802         memcpy(ipv6->mask.dst_ip, mask->hdr.dst_addr,
 803                RTE_DIM(ipv6->mask.dst_ip));
 804         ipv6->mask.flow_label = mask->hdr.vtc_flow;
 805         ipv6->mask.next_hdr = mask->hdr.proto;
 806         ipv6->mask.hop_limit = mask->hdr.hop_limits;
 807         /* Remove unwanted bits from values. */
 808         for (i = 0; i < RTE_DIM(ipv6->val.src_ip); ++i) {
 809                 ipv6->val.src_ip[i] &= ipv6->mask.src_ip[i];
 810                 ipv6->val.dst_ip[i] &= ipv6->mask.dst_ip[i];
 811         }
 812         ipv6->val.flow_label &= ipv6->mask.flow_label;
 813         ipv6->val.next_hdr &= ipv6->mask.next_hdr;
 814         ipv6->val.hop_limit &= ipv6->mask.hop_limit;
 815         return 0;
 816 }
 817
 818 /**
 819  * Convert UDP item to Verbs specification.
 820  *
 821  * @param item[in]
 822  *   Item specification.
 823  * @param default_mask[in]
 824  *   Default bit-masks to use when item->mask is not provided.
 825  * @param data[in, out]
 826  *   User structure.
 827  */
 828 static int
 829 mlx5_flow_create_udp(const struct rte_flow_item *item,
 830                      const void *default_mask,
 831                      void *data)
 832 {
 833         const struct rte_flow_item_udp *spec = item->spec;
 834         const struct rte_flow_item_udp *mask = item->mask;
 835         struct mlx5_flow *flow = (struct mlx5_flow *)data;
 836         struct ibv_exp_flow_spec_tcp_udp *udp;
 837         unsigned int udp_size = sizeof(struct ibv_exp_flow_spec_tcp_udp);
 838
 839         ++flow->ibv_attr->num_of_specs;
 840         flow->ibv_attr->priority = 0;
 841         flow->hash_fields |= (IBV_EXP_RX_HASH_SRC_PORT_UDP |
 842                               IBV_EXP_RX_HASH_DST_PORT_UDP);
 843         udp = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
 844         *udp = (struct ibv_exp_flow_spec_tcp_udp) {
 845                 .type = flow->inner | IBV_EXP_FLOW_SPEC_UDP,
 846                 .size = udp_size,
 847         };
 848         if (!spec)
 849                 return 0;
 850         if (!mask)
 851                 mask = default_mask;
 852         udp->val.dst_port = spec->hdr.dst_port;
 853         udp->val.src_port = spec->hdr.src_port;
 854         udp->mask.dst_port = mask->hdr.dst_port;
 855         udp->mask.src_port = mask->hdr.src_port;
 856         /* Remove unwanted bits from values. */
 857         udp->val.src_port &= udp->mask.src_port;
 858         udp->val.dst_port &= udp->mask.dst_port;
 859         return 0;
 860 }
 861
 862 /**
 863  * Convert TCP item to Verbs specification.
 864  *
 865  * @param item[in]
 866  *   Item specification.
 867  * @param default_mask[in]
 868  *   Default bit-masks to use when item->mask is not provided.
 869  * @param data[in, out]
 870  *   User structure.
 871  */
 872 static int
 873 mlx5_flow_create_tcp(const struct rte_flow_item *item,
 874                      const void *default_mask,
 875                      void *data)
 876 {
 877         const struct rte_flow_item_tcp *spec = item->spec;
 878         const struct rte_flow_item_tcp *mask = item->mask;
 879         struct mlx5_flow *flow = (struct mlx5_flow *)data;
 880         struct ibv_exp_flow_spec_tcp_udp *tcp;
 881         unsigned int tcp_size = sizeof(struct ibv_exp_flow_spec_tcp_udp);
 882
 883         ++flow->ibv_attr->num_of_specs;
 884         flow->ibv_attr->priority = 0;
 885         flow->hash_fields |= (IBV_EXP_RX_HASH_SRC_PORT_TCP |
 886                               IBV_EXP_RX_HASH_DST_PORT_TCP);
 887         tcp = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
 888         *tcp = (struct ibv_exp_flow_spec_tcp_udp) {
 889                 .type = flow->inner | IBV_EXP_FLOW_SPEC_TCP,
 890                 .size = tcp_size,
 891         };
 892         if (!spec)
 893                 return 0;
 894         if (!mask)
 895                 mask = default_mask;
 896         tcp->val.dst_port = spec->hdr.dst_port;
 897         tcp->val.src_port = spec->hdr.src_port;
 898         tcp->mask.dst_port = mask->hdr.dst_port;
 899         tcp->mask.src_port = mask->hdr.src_port;
 900         /* Remove unwanted bits from values. */
 901         tcp->val.src_port &= tcp->mask.src_port;
 902         tcp->val.dst_port &= tcp->mask.dst_port;
 903         return 0;
 904 }
 905
 906 /**
 907  * Convert VXLAN item to Verbs specification.
 908  *
 909  * @param item[in]
 910  *   Item specification.
 911  * @param default_mask[in]
 912  *   Default bit-masks to use when item->mask is not provided.
 913  * @param data[in, out]
 914  *   User structure.
 915  */
 916 static int
 917 mlx5_flow_create_vxlan(const struct rte_flow_item *item,
 918                        const void *default_mask,
 919                        void *data)
 920 {
 921         const struct rte_flow_item_vxlan *spec = item->spec;
 922         const struct rte_flow_item_vxlan *mask = item->mask;
 923         struct mlx5_flow *flow = (struct mlx5_flow *)data;
 924         struct ibv_exp_flow_spec_tunnel *vxlan;
 925         unsigned int size = sizeof(struct ibv_exp_flow_spec_tunnel);
 926         union vni {
 927                 uint32_t vlan_id;
 928                 uint8_t vni[4];
 929         } id;
 930
 931         ++flow->ibv_attr->num_of_specs;
 932         flow->ibv_attr->priority = 0;
 933         id.vni[0] = 0;
 934         vxlan = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
 935         *vxlan = (struct ibv_exp_flow_spec_tunnel) {
 936                 .type = flow->inner | IBV_EXP_FLOW_SPEC_VXLAN_TUNNEL,
 937                 .size = size,
 938         };
 939         flow->inner = IBV_EXP_FLOW_SPEC_INNER;
 940         if (!spec)
 941                 return 0;
 942         if (!mask)
 943                 mask = default_mask;
 944         memcpy(&id.vni[1], spec->vni, 3);
 945         vxlan->val.tunnel_id = id.vlan_id;
 946         memcpy(&id.vni[1], mask->vni, 3);
 947         vxlan->mask.tunnel_id = id.vlan_id;
 948         /* Remove unwanted bits from values. */
 949         vxlan->val.tunnel_id &= vxlan->mask.tunnel_id;
 950         return 0;
 951 }
 952
 953 /**
 954  * Convert mark/flag action to Verbs specification.
 955  *
 956  * @param flow
 957  *   Pointer to MLX5 flow structure.
 958  * @param mark_id
 959  *   Mark identifier.
 960  */
 961 static int
 962 mlx5_flow_create_flag_mark(struct mlx5_flow *flow, uint32_t mark_id)
 963 {
 964         struct ibv_exp_flow_spec_action_tag *tag;
 965         unsigned int size = sizeof(struct ibv_exp_flow_spec_action_tag);
 966
 967         tag = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
 968         *tag = (struct ibv_exp_flow_spec_action_tag){
 969                 .type = IBV_EXP_FLOW_SPEC_ACTION_TAG,
 970                 .size = size,
 971                 .tag_id = mlx5_flow_mark_set(mark_id),
 972         };
 973         ++flow->ibv_attr->num_of_specs;
 974         return 0;
 975 }
 976
 977 /**
 978  * Complete flow rule creation with a drop queue.
 979  *
 980  * @param priv
 981  *   Pointer to private structure.
 982  * @param flow
 983  *   MLX5 flow attributes (filled by mlx5_flow_validate()).
 984  * @param[out] error
 985  *   Perform verbose error reporting if not NULL.
 986  *
 987  * @return
 988  *   A flow if the rule could be created.
 989  */
 990 static struct rte_flow *
 991 priv_flow_create_action_queue_drop(struct priv *priv,
 992                                    struct mlx5_flow *flow,
 993                                    struct rte_flow_error *error)
 994 {
 995         struct rte_flow *rte_flow;
 996
 997         assert(priv->pd);
 998         assert(priv->ctx);
 999         rte_flow = rte_calloc(__func__, 1, sizeof(*rte_flow), 0);
1000         if (!rte_flow) {
1001                 rte_flow_error_set(error, ENOMEM, RTE_FLOW_ERROR_TYPE_HANDLE,
1002                                    NULL, "cannot allocate flow memory");
1003                 return NULL;
1004         }
1005         rte_flow->drop = 1;
1006         rte_flow->ibv_attr = flow->ibv_attr;
1007         rte_flow->qp = priv->flow_drop_queue->qp;
1008         if (!priv->started)
1009                 return rte_flow;
1010         rte_flow->ibv_flow = ibv_exp_create_flow(rte_flow->qp,
1011                                                  rte_flow->ibv_attr);
1012         if (!rte_flow->ibv_flow) {
1013                 rte_flow_error_set(error, ENOMEM, RTE_FLOW_ERROR_TYPE_HANDLE,
1014                                    NULL, "flow rule creation failure");
1015                 goto error;
1016         }
1017         return rte_flow;
1018 error:
1019         assert(rte_flow);
1020         rte_free(rte_flow);
1021         return NULL;
1022 }
1023
1024 /**
1025  * Complete flow rule creation.
1026  *
1027  * @param priv
1028  *   Pointer to private structure.
1029  * @param flow
1030  *   MLX5 flow attributes (filled by mlx5_flow_validate()).
1031  * @param action
1032  *   Target action structure.
1033  * @param[out] error
1034  *   Perform verbose error reporting if not NULL.
1035  *
1036  * @return
1037  *   A flow if the rule could be created.
1038  */
1039 static struct rte_flow *
1040 priv_flow_create_action_queue(struct priv *priv,
1041                               struct mlx5_flow *flow,
1042                               struct mlx5_flow_action *action,
1043                               struct rte_flow_error *error)
1044 {
1045         struct rte_flow *rte_flow;
1046         unsigned int i;
1047         unsigned int j;
1048         const unsigned int wqs_n = 1 << log2above(action->queues_n);
1049         struct ibv_exp_wq *wqs[wqs_n];
1050
1051         assert(priv->pd);
1052         assert(priv->ctx);
1053         assert(!action->drop);
1054         rte_flow = rte_calloc(__func__, 1, sizeof(*rte_flow) +
1055                               sizeof(*rte_flow->rxqs) * action->queues_n, 0);
1056         if (!rte_flow) {
1057                 rte_flow_error_set(error, ENOMEM, RTE_FLOW_ERROR_TYPE_HANDLE,
1058                                    NULL, "cannot allocate flow memory");
1059                 return NULL;
1060         }
1061         for (i = 0; i < action->queues_n; ++i) {
1062                 struct rxq_ctrl *rxq;
1063
1064                 rxq = container_of((*priv->rxqs)[action->queues[i]],
1065                                    struct rxq_ctrl, rxq);
1066                 wqs[i] = rxq->wq;
1067                 rte_flow->rxqs[i] = &rxq->rxq;
1068                 ++rte_flow->rxqs_n;
1069                 rxq->rxq.mark |= action->mark;
1070         }
1071         /* finalise indirection table. */
1072         for (j = 0; i < wqs_n; ++i, ++j) {
1073                 wqs[i] = wqs[j];
1074                 if (j == action->queues_n)
1075                         j = 0;
1076         }
1077         rte_flow->mark = action->mark;
1078         rte_flow->ibv_attr = flow->ibv_attr;
1079         rte_flow->hash_fields = flow->hash_fields;
1080         rte_flow->ind_table = ibv_exp_create_rwq_ind_table(
1081                 priv->ctx,
1082                 &(struct ibv_exp_rwq_ind_table_init_attr){
1083                         .pd = priv->pd,
1084                         .log_ind_tbl_size = log2above(action->queues_n),
1085                         .ind_tbl = wqs,
1086                         .comp_mask = 0,
1087                 });
1088         if (!rte_flow->ind_table) {
1089                 rte_flow_error_set(error, ENOMEM, RTE_FLOW_ERROR_TYPE_HANDLE,
1090                                    NULL, "cannot allocate indirection table");
1091                 goto error;
1092         }
1093         rte_flow->qp = ibv_exp_create_qp(
1094                 priv->ctx,
1095                 &(struct ibv_exp_qp_init_attr){
1096                         .qp_type = IBV_QPT_RAW_PACKET,
1097                         .comp_mask =
1098                                 IBV_EXP_QP_INIT_ATTR_PD |
1099                                 IBV_EXP_QP_INIT_ATTR_PORT |
1100                                 IBV_EXP_QP_INIT_ATTR_RX_HASH,
1101                         .pd = priv->pd,
1102                         .rx_hash_conf = &(struct ibv_exp_rx_hash_conf){
1103                                 .rx_hash_function =
1104                                         IBV_EXP_RX_HASH_FUNC_TOEPLITZ,
1105                                 .rx_hash_key_len = rss_hash_default_key_len,
1106                                 .rx_hash_key = rss_hash_default_key,
1107                                 .rx_hash_fields_mask = rte_flow->hash_fields,
1108                                 .rwq_ind_tbl = rte_flow->ind_table,
1109                         },
1110                         .port_num = priv->port,
1111                 });
1112         if (!rte_flow->qp) {
1113                 rte_flow_error_set(error, ENOMEM, RTE_FLOW_ERROR_TYPE_HANDLE,
1114                                    NULL, "cannot allocate QP");
1115                 goto error;
1116         }
1117         if (!priv->started)
1118                 return rte_flow;
1119         rte_flow->ibv_flow = ibv_exp_create_flow(rte_flow->qp,
1120                                                  rte_flow->ibv_attr);
1121         if (!rte_flow->ibv_flow) {
1122                 rte_flow_error_set(error, ENOMEM, RTE_FLOW_ERROR_TYPE_HANDLE,
1123                                    NULL, "flow rule creation failure");
1124                 goto error;
1125         }
1126         return rte_flow;
1127 error:
1128         assert(rte_flow);
1129         if (rte_flow->qp)
1130                 ibv_destroy_qp(rte_flow->qp);
1131         if (rte_flow->ind_table)
1132                 ibv_exp_destroy_rwq_ind_table(rte_flow->ind_table);
1133         rte_free(rte_flow);
1134         return NULL;
1135 }
1136
1137 /**
1138  * Convert a flow.
1139  *
1140  * @param priv
1141  *   Pointer to private structure.
1142  * @param[in] attr
1143  *   Flow rule attributes.
1144  * @param[in] pattern
1145  *   Pattern specification (list terminated by the END pattern item).
1146  * @param[in] actions
1147  *   Associated actions (list terminated by the END action).
1148  * @param[out] error
1149  *   Perform verbose error reporting if not NULL.
1150  *
1151  * @return
1152  *   A flow on success, NULL otherwise.
1153  */
1154 static struct rte_flow *
1155 priv_flow_create(struct priv *priv,
1156                  const struct rte_flow_attr *attr,
1157                  const struct rte_flow_item items[],
1158                  const struct rte_flow_action actions[],
1159                  struct rte_flow_error *error)
1160 {
1161         struct rte_flow *rte_flow;
1162         struct mlx5_flow flow = { .offset = sizeof(struct ibv_exp_flow_attr), };
1163         struct mlx5_flow_action action = {
1164                 .queue = 0,
1165                 .drop = 0,
1166                 .mark = 0,
1167                 .mark_id = MLX5_FLOW_MARK_DEFAULT,
1168                 .queues_n = 0,
1169         };
1170         int err;
1171
1172         err = priv_flow_validate(priv, attr, items, actions, error, &flow,
1173                                  &action);
1174         if (err)
1175                 goto exit;
1176         flow.ibv_attr = rte_malloc(__func__, flow.offset, 0);
1177         flow.offset = sizeof(struct ibv_exp_flow_attr);
1178         if (!flow.ibv_attr) {
1179                 rte_flow_error_set(error, ENOMEM, RTE_FLOW_ERROR_TYPE_HANDLE,
1180                                    NULL, "cannot allocate ibv_attr memory");
1181                 goto exit;
1182         }
1183         *flow.ibv_attr = (struct ibv_exp_flow_attr){
1184                 .type = IBV_EXP_FLOW_ATTR_NORMAL,
1185                 .size = sizeof(struct ibv_exp_flow_attr),
1186                 .priority = attr->priority,
1187                 .num_of_specs = 0,
1188                 .port = 0,
1189                 .flags = 0,
1190                 .reserved = 0,
1191         };
1192         flow.inner = 0;
1193         flow.hash_fields = 0;
1194         claim_zero(priv_flow_validate(priv, attr, items, actions,
1195                                       error, &flow, &action));
1196         if (action.mark && !action.drop) {
1197                 mlx5_flow_create_flag_mark(&flow, action.mark_id);
1198                 flow.offset += sizeof(struct ibv_exp_flow_spec_action_tag);
1199         }
1200         if (action.drop)
1201                 rte_flow =
1202                         priv_flow_create_action_queue_drop(priv, &flow, error);
1203         else
1204                 rte_flow = priv_flow_create_action_queue(priv, &flow, &action,
1205                                                          error);
1206         if (!rte_flow)
1207                 goto exit;
1208         return rte_flow;
1209 exit:
1210         rte_free(flow.ibv_attr);
1211         return NULL;
1212 }
1213
1214 /**
1215  * Create a flow.
1216  *
1217  * @see rte_flow_create()
1218  * @see rte_flow_ops
1219  */
1220 struct rte_flow *
1221 mlx5_flow_create(struct rte_eth_dev *dev,
1222                  const struct rte_flow_attr *attr,
1223                  const struct rte_flow_item items[],
1224                  const struct rte_flow_action actions[],
1225                  struct rte_flow_error *error)
1226 {
1227         struct priv *priv = dev->data->dev_private;
1228         struct rte_flow *flow;
1229
1230         priv_lock(priv);
1231         flow = priv_flow_create(priv, attr, items, actions, error);
1232         if (flow) {
1233                 LIST_INSERT_HEAD(&priv->flows, flow, next);
1234                 DEBUG("Flow created %p", (void *)flow);
1235         }
1236         priv_unlock(priv);
1237         return flow;
1238 }
1239
1240 /**
1241  * Destroy a flow.
1242  *
1243  * @param priv
1244  *   Pointer to private structure.
1245  * @param[in] flow
1246  *   Flow to destroy.
1247  */
1248 static void
1249 priv_flow_destroy(struct priv *priv,
1250                   struct rte_flow *flow)
1251 {
1252         (void)priv;
1253         LIST_REMOVE(flow, next);
1254         if (flow->ibv_flow)
1255                 claim_zero(ibv_exp_destroy_flow(flow->ibv_flow));
1256         if (flow->drop)
1257                 goto free;
1258         if (flow->qp)
1259                 claim_zero(ibv_destroy_qp(flow->qp));
1260         if (flow->ind_table)
1261                 claim_zero(ibv_exp_destroy_rwq_ind_table(flow->ind_table));
1262         if (flow->drop && flow->wq)
1263                 claim_zero(ibv_exp_destroy_wq(flow->wq));
1264         if (flow->drop && flow->cq)
1265                 claim_zero(ibv_destroy_cq(flow->cq));
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 = LIST_FIRST(&priv->flows);
1279                              tmp;
1280                              tmp = LIST_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 (!LIST_EMPTY(&priv->flows)) {
1334                 struct rte_flow *flow;
1335
1336                 flow = LIST_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         unsigned int i;
1374
1375         assert(priv->pd);
1376         assert(priv->ctx);
1377         fdq = rte_calloc(__func__, 1, sizeof(*fdq), 0);
1378         if (!fdq) {
1379                 WARN("cannot allocate memory for drop queue");
1380                 goto error;
1381         }
1382         fdq->cq = ibv_exp_create_cq(priv->ctx, 1, NULL, NULL, 0,
1383                         &(struct ibv_exp_cq_init_attr){
1384                         .comp_mask = 0,
1385                         });
1386         if (!fdq->cq) {
1387                 WARN("cannot allocate CQ for drop queue");
1388                 goto error;
1389         }
1390         for (i = 0; i != MLX5_DROP_WQ_N; ++i) {
1391                 fdq->wqs[i] = ibv_exp_create_wq(priv->ctx,
1392                                 &(struct ibv_exp_wq_init_attr){
1393                                 .wq_type = IBV_EXP_WQT_RQ,
1394                                 .max_recv_wr = 1,
1395                                 .max_recv_sge = 1,
1396                                 .pd = priv->pd,
1397                                 .cq = fdq->cq,
1398                                 });
1399                 if (!fdq->wqs[i]) {
1400                         WARN("cannot allocate WQ for drop queue");
1401                         goto error;
1402                 }
1403         }
1404         fdq->ind_table = ibv_exp_create_rwq_ind_table(priv->ctx,
1405                         &(struct ibv_exp_rwq_ind_table_init_attr){
1406                         .pd = priv->pd,
1407                         .log_ind_tbl_size = 0,
1408                         .ind_tbl = fdq->wqs,
1409                         .comp_mask = 0,
1410                         });
1411         if (!fdq->ind_table) {
1412                 WARN("cannot allocate indirection table for drop queue");
1413                 goto error;
1414         }
1415         fdq->qp = ibv_exp_create_qp(priv->ctx,
1416                 &(struct ibv_exp_qp_init_attr){
1417                         .qp_type = IBV_QPT_RAW_PACKET,
1418                         .comp_mask =
1419                                 IBV_EXP_QP_INIT_ATTR_PD |
1420                                 IBV_EXP_QP_INIT_ATTR_PORT |
1421                                 IBV_EXP_QP_INIT_ATTR_RX_HASH,
1422                         .pd = priv->pd,
1423                         .rx_hash_conf = &(struct ibv_exp_rx_hash_conf){
1424                                 .rx_hash_function =
1425                                         IBV_EXP_RX_HASH_FUNC_TOEPLITZ,
1426                                 .rx_hash_key_len = rss_hash_default_key_len,
1427                                 .rx_hash_key = rss_hash_default_key,
1428                                 .rx_hash_fields_mask = 0,
1429                                 .rwq_ind_tbl = fdq->ind_table,
1430                                 },
1431                         .port_num = priv->port,
1432                         });
1433         if (!fdq->qp) {
1434                 WARN("cannot allocate QP for drop queue");
1435                 goto error;
1436         }
1437         priv->flow_drop_queue = fdq;
1438         return 0;
1439 error:
1440         if (fdq->qp)
1441                 claim_zero(ibv_destroy_qp(fdq->qp));
1442         if (fdq->ind_table)
1443                 claim_zero(ibv_exp_destroy_rwq_ind_table(fdq->ind_table));
1444         for (i = 0; i != MLX5_DROP_WQ_N; ++i) {
1445                 if (fdq->wqs[i])
1446                         claim_zero(ibv_exp_destroy_wq(fdq->wqs[i]));
1447         }
1448         if (fdq->cq)
1449                 claim_zero(ibv_destroy_cq(fdq->cq));
1450         if (fdq)
1451                 rte_free(fdq);
1452         priv->flow_drop_queue = NULL;
1453         return -1;
1454 }
1455
1456 /**
1457  * Delete drop queue.
1458  *
1459  * @param priv
1460  *   Pointer to private structure.
1461  */
1462 static void
1463 priv_flow_delete_drop_queue(struct priv *priv)
1464 {
1465         struct rte_flow_drop *fdq = priv->flow_drop_queue;
1466         unsigned int i;
1467
1468         if (!fdq)
1469                 return;
1470         if (fdq->qp)
1471                 claim_zero(ibv_destroy_qp(fdq->qp));
1472         if (fdq->ind_table)
1473                 claim_zero(ibv_exp_destroy_rwq_ind_table(fdq->ind_table));
1474         for (i = 0; i != MLX5_DROP_WQ_N; ++i) {
1475                 if (fdq->wqs[i])
1476                         claim_zero(ibv_exp_destroy_wq(fdq->wqs[i]));
1477         }
1478         if (fdq->cq)
1479                 claim_zero(ibv_destroy_cq(fdq->cq));
1480         rte_free(fdq);
1481         priv->flow_drop_queue = NULL;
1482 }
1483
1484 /**
1485  * Remove all flows.
1486  *
1487  * Called by dev_stop() to remove all flows.
1488  *
1489  * @param priv
1490  *   Pointer to private structure.
1491  */
1492 void
1493 priv_flow_stop(struct priv *priv)
1494 {
1495         struct rte_flow *flow;
1496
1497         for (flow = LIST_FIRST(&priv->flows);
1498              flow;
1499              flow = LIST_NEXT(flow, next)) {
1500                 claim_zero(ibv_exp_destroy_flow(flow->ibv_flow));
1501                 flow->ibv_flow = NULL;
1502                 if (flow->mark) {
1503                         unsigned int n;
1504
1505                         for (n = 0; n < flow->rxqs_n; ++n)
1506                                 flow->rxqs[n]->mark = 0;
1507                 }
1508                 DEBUG("Flow %p removed", (void *)flow);
1509         }
1510         priv_flow_delete_drop_queue(priv);
1511 }
1512
1513 /**
1514  * Add all flows.
1515  *
1516  * @param priv
1517  *   Pointer to private structure.
1518  *
1519  * @return
1520  *   0 on success, a errno value otherwise and rte_errno is set.
1521  */
1522 int
1523 priv_flow_start(struct priv *priv)
1524 {
1525         int ret;
1526         struct rte_flow *flow;
1527
1528         ret = priv_flow_create_drop_queue(priv);
1529         if (ret)
1530                 return -1;
1531         for (flow = LIST_FIRST(&priv->flows);
1532              flow;
1533              flow = LIST_NEXT(flow, next)) {
1534                 struct ibv_qp *qp;
1535
1536                 if (flow->drop)
1537                         qp = priv->flow_drop_queue->qp;
1538                 else
1539                         qp = flow->qp;
1540                 flow->ibv_flow = ibv_exp_create_flow(qp, flow->ibv_attr);
1541                 if (!flow->ibv_flow) {
1542                         DEBUG("Flow %p cannot be applied", (void *)flow);
1543                         rte_errno = EINVAL;
1544                         return rte_errno;
1545                 }
1546                 DEBUG("Flow %p applied", (void *)flow);
1547                 if (flow->mark) {
1548                         unsigned int n;
1549
1550                         for (n = 0; n < flow->rxqs_n; ++n)
1551                                 flow->rxqs[n]->mark = 1;
1552                 }
1553         }
1554         return 0;
1555 }
1556
1557 /**
1558  * Verify if the Rx queue is used in a flow.
1559  *
1560  * @param priv
1561  *   Pointer to private structure.
1562  * @param rxq
1563  *   Pointer to the queue to search.
1564  *
1565  * @return
1566  *   Nonzero if the queue is used by a flow.
1567  */
1568 int
1569 priv_flow_rxq_in_use(struct priv *priv, struct rxq *rxq)
1570 {
1571         struct rte_flow *flow;
1572
1573         for (flow = LIST_FIRST(&priv->flows);
1574              flow;
1575              flow = LIST_NEXT(flow, next)) {
1576                 unsigned int n;
1577
1578                 if (flow->drop)
1579                         continue;
1580                 for (n = 0; n < flow->rxqs_n; ++n) {
1581                         if (flow->rxqs[n] == rxq)
1582                                 return 1;
1583                 }
1584         }
1585         return 0;
1586 }