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 (action->queues_n == 1) {
 510                                 uint16_t found = 0;
 511
 512                                 assert(action->queues_n);
 513                                 for (n = 0; n < rss->num; ++n) {
 514                                         if (action->queues[0] ==
 515                                             rss->queue[n]) {
 516                                                 found = 1;
 517                                                 break;
 518                                         }
 519                                 }
 520                                 if (!found) {
 521                                         rte_flow_error_set(error, ENOTSUP,
 522                                                    RTE_FLOW_ERROR_TYPE_ACTION,
 523                                                    actions,
 524                                                    "queue action not in RSS"
 525                                                    " queues");
 526                                         return -rte_errno;
 527                                 }
 528                         }
 529                         for (n = 0; n < rss->num; ++n) {
 530                                 if (rss->queue[n] >= priv->rxqs_n) {
 531                                         rte_flow_error_set(error, EINVAL,
 532                                                    RTE_FLOW_ERROR_TYPE_ACTION,
 533                                                    actions,
 534                                                    "queue id > number of"
 535                                                    " queues");
 536                                         return -rte_errno;
 537                                 }
 538                         }
 539                         action->queue = 1;
 540                         for (n = 0; n < rss->num; ++n)
 541                                 action->queues[n] = rss->queue[n];
 542                         action->queues_n = rss->num;
 543                 } else if (actions->type == RTE_FLOW_ACTION_TYPE_MARK) {
 544                         const struct rte_flow_action_mark *mark =
 545                                 (const struct rte_flow_action_mark *)
 546                                 actions->conf;
 547
 548                         if (!mark) {
 549                                 rte_flow_error_set(error, EINVAL,
 550                                                    RTE_FLOW_ERROR_TYPE_ACTION,
 551                                                    actions,
 552                                                    "mark must be defined");
 553                                 return -rte_errno;
 554                         } else if (mark->id >= MLX5_FLOW_MARK_MAX) {
 555                                 rte_flow_error_set(error, ENOTSUP,
 556                                                    RTE_FLOW_ERROR_TYPE_ACTION,
 557                                                    actions,
 558                                                    "mark must be between 0"
 559                                                    " and 16777199");
 560                                 return -rte_errno;
 561                         }
 562                         action->mark = 1;
 563                         action->mark_id = mark->id;
 564                 } else if (actions->type == RTE_FLOW_ACTION_TYPE_FLAG) {
 565                         action->mark = 1;
 566                 } else {
 567                         goto exit_action_not_supported;
 568                 }
 569         }
 570         if (action->mark && !flow->ibv_attr && !action->drop)
 571                 flow->offset += sizeof(struct ibv_exp_flow_spec_action_tag);
 572         if (!action->queue && !action->drop) {
 573                 rte_flow_error_set(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_HANDLE,
 574                                    NULL, "no valid action");
 575                 return -rte_errno;
 576         }
 577         return 0;
 578 exit_item_not_supported:
 579         rte_flow_error_set(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ITEM,
 580                            items, "item not supported");
 581         return -rte_errno;
 582 exit_action_not_supported:
 583         rte_flow_error_set(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ACTION,
 584                            actions, "action not supported");
 585         return -rte_errno;
 586 }
 587
 588 /**
 589  * Validate a flow supported by the NIC.
 590  *
 591  * @see rte_flow_validate()
 592  * @see rte_flow_ops
 593  */
 594 int
 595 mlx5_flow_validate(struct rte_eth_dev *dev,
 596                    const struct rte_flow_attr *attr,
 597                    const struct rte_flow_item items[],
 598                    const struct rte_flow_action actions[],
 599                    struct rte_flow_error *error)
 600 {
 601         struct priv *priv = dev->data->dev_private;
 602         int ret;
 603         struct mlx5_flow flow = { .offset = sizeof(struct ibv_exp_flow_attr) };
 604         struct mlx5_flow_action action = {
 605                 .queue = 0,
 606                 .drop = 0,
 607                 .mark = 0,
 608                 .mark_id = MLX5_FLOW_MARK_DEFAULT,
 609                 .queues_n = 0,
 610         };
 611
 612         priv_lock(priv);
 613         ret = priv_flow_validate(priv, attr, items, actions, error, &flow,
 614                                  &action);
 615         priv_unlock(priv);
 616         return ret;
 617 }
 618
 619 /**
 620  * Convert Ethernet item to Verbs specification.
 621  *
 622  * @param item[in]
 623  *   Item specification.
 624  * @param default_mask[in]
 625  *   Default bit-masks to use when item->mask is not provided.
 626  * @param data[in, out]
 627  *   User structure.
 628  */
 629 static int
 630 mlx5_flow_create_eth(const struct rte_flow_item *item,
 631                      const void *default_mask,
 632                      void *data)
 633 {
 634         const struct rte_flow_item_eth *spec = item->spec;
 635         const struct rte_flow_item_eth *mask = item->mask;
 636         struct mlx5_flow *flow = (struct mlx5_flow *)data;
 637         struct ibv_exp_flow_spec_eth *eth;
 638         const unsigned int eth_size = sizeof(struct ibv_exp_flow_spec_eth);
 639         unsigned int i;
 640
 641         ++flow->ibv_attr->num_of_specs;
 642         flow->ibv_attr->priority = 2;
 643         flow->hash_fields = 0;
 644         eth = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
 645         *eth = (struct ibv_exp_flow_spec_eth) {
 646                 .type = flow->inner | IBV_EXP_FLOW_SPEC_ETH,
 647                 .size = eth_size,
 648         };
 649         if (!spec)
 650                 return 0;
 651         if (!mask)
 652                 mask = default_mask;
 653         memcpy(eth->val.dst_mac, spec->dst.addr_bytes, ETHER_ADDR_LEN);
 654         memcpy(eth->val.src_mac, spec->src.addr_bytes, ETHER_ADDR_LEN);
 655         eth->val.ether_type = spec->type;
 656         memcpy(eth->mask.dst_mac, mask->dst.addr_bytes, ETHER_ADDR_LEN);
 657         memcpy(eth->mask.src_mac, mask->src.addr_bytes, ETHER_ADDR_LEN);
 658         eth->mask.ether_type = mask->type;
 659         /* Remove unwanted bits from values. */
 660         for (i = 0; i < ETHER_ADDR_LEN; ++i) {
 661                 eth->val.dst_mac[i] &= eth->mask.dst_mac[i];
 662                 eth->val.src_mac[i] &= eth->mask.src_mac[i];
 663         }
 664         eth->val.ether_type &= eth->mask.ether_type;
 665         return 0;
 666 }
 667
 668 /**
 669  * Convert VLAN item to Verbs specification.
 670  *
 671  * @param item[in]
 672  *   Item specification.
 673  * @param default_mask[in]
 674  *   Default bit-masks to use when item->mask is not provided.
 675  * @param data[in, out]
 676  *   User structure.
 677  */
 678 static int
 679 mlx5_flow_create_vlan(const struct rte_flow_item *item,
 680                       const void *default_mask,
 681                       void *data)
 682 {
 683         const struct rte_flow_item_vlan *spec = item->spec;
 684         const struct rte_flow_item_vlan *mask = item->mask;
 685         struct mlx5_flow *flow = (struct mlx5_flow *)data;
 686         struct ibv_exp_flow_spec_eth *eth;
 687         const unsigned int eth_size = sizeof(struct ibv_exp_flow_spec_eth);
 688
 689         eth = (void *)((uintptr_t)flow->ibv_attr + flow->offset - eth_size);
 690         if (!spec)
 691                 return 0;
 692         if (!mask)
 693                 mask = default_mask;
 694         eth->val.vlan_tag = spec->tci;
 695         eth->mask.vlan_tag = mask->tci;
 696         eth->val.vlan_tag &= eth->mask.vlan_tag;
 697         return 0;
 698 }
 699
 700 /**
 701  * Convert IPv4 item to Verbs specification.
 702  *
 703  * @param item[in]
 704  *   Item specification.
 705  * @param default_mask[in]
 706  *   Default bit-masks to use when item->mask is not provided.
 707  * @param data[in, out]
 708  *   User structure.
 709  */
 710 static int
 711 mlx5_flow_create_ipv4(const struct rte_flow_item *item,
 712                       const void *default_mask,
 713                       void *data)
 714 {
 715         const struct rte_flow_item_ipv4 *spec = item->spec;
 716         const struct rte_flow_item_ipv4 *mask = item->mask;
 717         struct mlx5_flow *flow = (struct mlx5_flow *)data;
 718         struct ibv_exp_flow_spec_ipv4_ext *ipv4;
 719         unsigned int ipv4_size = sizeof(struct ibv_exp_flow_spec_ipv4_ext);
 720
 721         ++flow->ibv_attr->num_of_specs;
 722         flow->ibv_attr->priority = 1;
 723         flow->hash_fields = (IBV_EXP_RX_HASH_SRC_IPV4 |
 724                              IBV_EXP_RX_HASH_DST_IPV4);
 725         ipv4 = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
 726         *ipv4 = (struct ibv_exp_flow_spec_ipv4_ext) {
 727                 .type = flow->inner | IBV_EXP_FLOW_SPEC_IPV4_EXT,
 728                 .size = ipv4_size,
 729         };
 730         if (!spec)
 731                 return 0;
 732         if (!mask)
 733                 mask = default_mask;
 734         ipv4->val = (struct ibv_exp_flow_ipv4_ext_filter){
 735                 .src_ip = spec->hdr.src_addr,
 736                 .dst_ip = spec->hdr.dst_addr,
 737                 .proto = spec->hdr.next_proto_id,
 738                 .tos = spec->hdr.type_of_service,
 739         };
 740         ipv4->mask = (struct ibv_exp_flow_ipv4_ext_filter){
 741                 .src_ip = mask->hdr.src_addr,
 742                 .dst_ip = mask->hdr.dst_addr,
 743                 .proto = mask->hdr.next_proto_id,
 744                 .tos = mask->hdr.type_of_service,
 745         };
 746         /* Remove unwanted bits from values. */
 747         ipv4->val.src_ip &= ipv4->mask.src_ip;
 748         ipv4->val.dst_ip &= ipv4->mask.dst_ip;
 749         ipv4->val.proto &= ipv4->mask.proto;
 750         ipv4->val.tos &= ipv4->mask.tos;
 751         return 0;
 752 }
 753
 754 /**
 755  * Convert IPv6 item to Verbs specification.
 756  *
 757  * @param item[in]
 758  *   Item specification.
 759  * @param default_mask[in]
 760  *   Default bit-masks to use when item->mask is not provided.
 761  * @param data[in, out]
 762  *   User structure.
 763  */
 764 static int
 765 mlx5_flow_create_ipv6(const struct rte_flow_item *item,
 766                       const void *default_mask,
 767                       void *data)
 768 {
 769         const struct rte_flow_item_ipv6 *spec = item->spec;
 770         const struct rte_flow_item_ipv6 *mask = item->mask;
 771         struct mlx5_flow *flow = (struct mlx5_flow *)data;
 772         struct ibv_exp_flow_spec_ipv6_ext *ipv6;
 773         unsigned int ipv6_size = sizeof(struct ibv_exp_flow_spec_ipv6_ext);
 774
 775         ++flow->ibv_attr->num_of_specs;
 776         flow->ibv_attr->priority = 1;
 777         flow->hash_fields = (IBV_EXP_RX_HASH_SRC_IPV6 |
 778                              IBV_EXP_RX_HASH_DST_IPV6);
 779         ipv6 = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
 780         *ipv6 = (struct ibv_exp_flow_spec_ipv6_ext) {
 781                 .type = flow->inner | IBV_EXP_FLOW_SPEC_IPV6_EXT,
 782                 .size = ipv6_size,
 783         };
 784         if (!spec)
 785                 return 0;
 786         if (!mask)
 787                 mask = default_mask;
 788         memcpy(ipv6->val.src_ip, spec->hdr.src_addr,
 789                RTE_DIM(ipv6->val.src_ip));
 790         memcpy(ipv6->val.dst_ip, spec->hdr.dst_addr,
 791                RTE_DIM(ipv6->val.dst_ip));
 792         memcpy(ipv6->mask.src_ip, mask->hdr.src_addr,
 793                RTE_DIM(ipv6->mask.src_ip));
 794         memcpy(ipv6->mask.dst_ip, mask->hdr.dst_addr,
 795                RTE_DIM(ipv6->mask.dst_ip));
 796         ipv6->mask.flow_label = mask->hdr.vtc_flow;
 797         ipv6->mask.next_hdr = mask->hdr.proto;
 798         ipv6->mask.hop_limit = mask->hdr.hop_limits;
 799         ipv6->val.flow_label &= ipv6->mask.flow_label;
 800         ipv6->val.next_hdr &= ipv6->mask.next_hdr;
 801         ipv6->val.hop_limit &= ipv6->mask.hop_limit;
 802         return 0;
 803 }
 804
 805 /**
 806  * Convert UDP item to Verbs specification.
 807  *
 808  * @param item[in]
 809  *   Item specification.
 810  * @param default_mask[in]
 811  *   Default bit-masks to use when item->mask is not provided.
 812  * @param data[in, out]
 813  *   User structure.
 814  */
 815 static int
 816 mlx5_flow_create_udp(const struct rte_flow_item *item,
 817                      const void *default_mask,
 818                      void *data)
 819 {
 820         const struct rte_flow_item_udp *spec = item->spec;
 821         const struct rte_flow_item_udp *mask = item->mask;
 822         struct mlx5_flow *flow = (struct mlx5_flow *)data;
 823         struct ibv_exp_flow_spec_tcp_udp *udp;
 824         unsigned int udp_size = sizeof(struct ibv_exp_flow_spec_tcp_udp);
 825
 826         ++flow->ibv_attr->num_of_specs;
 827         flow->ibv_attr->priority = 0;
 828         flow->hash_fields |= (IBV_EXP_RX_HASH_SRC_PORT_UDP |
 829                               IBV_EXP_RX_HASH_DST_PORT_UDP);
 830         udp = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
 831         *udp = (struct ibv_exp_flow_spec_tcp_udp) {
 832                 .type = flow->inner | IBV_EXP_FLOW_SPEC_UDP,
 833                 .size = udp_size,
 834         };
 835         if (!spec)
 836                 return 0;
 837         if (!mask)
 838                 mask = default_mask;
 839         udp->val.dst_port = spec->hdr.dst_port;
 840         udp->val.src_port = spec->hdr.src_port;
 841         udp->mask.dst_port = mask->hdr.dst_port;
 842         udp->mask.src_port = mask->hdr.src_port;
 843         /* Remove unwanted bits from values. */
 844         udp->val.src_port &= udp->mask.src_port;
 845         udp->val.dst_port &= udp->mask.dst_port;
 846         return 0;
 847 }
 848
 849 /**
 850  * Convert TCP item to Verbs specification.
 851  *
 852  * @param item[in]
 853  *   Item specification.
 854  * @param default_mask[in]
 855  *   Default bit-masks to use when item->mask is not provided.
 856  * @param data[in, out]
 857  *   User structure.
 858  */
 859 static int
 860 mlx5_flow_create_tcp(const struct rte_flow_item *item,
 861                      const void *default_mask,
 862                      void *data)
 863 {
 864         const struct rte_flow_item_tcp *spec = item->spec;
 865         const struct rte_flow_item_tcp *mask = item->mask;
 866         struct mlx5_flow *flow = (struct mlx5_flow *)data;
 867         struct ibv_exp_flow_spec_tcp_udp *tcp;
 868         unsigned int tcp_size = sizeof(struct ibv_exp_flow_spec_tcp_udp);
 869
 870         ++flow->ibv_attr->num_of_specs;
 871         flow->ibv_attr->priority = 0;
 872         flow->hash_fields |= (IBV_EXP_RX_HASH_SRC_PORT_TCP |
 873                               IBV_EXP_RX_HASH_DST_PORT_TCP);
 874         tcp = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
 875         *tcp = (struct ibv_exp_flow_spec_tcp_udp) {
 876                 .type = flow->inner | IBV_EXP_FLOW_SPEC_TCP,
 877                 .size = tcp_size,
 878         };
 879         if (!spec)
 880                 return 0;
 881         if (!mask)
 882                 mask = default_mask;
 883         tcp->val.dst_port = spec->hdr.dst_port;
 884         tcp->val.src_port = spec->hdr.src_port;
 885         tcp->mask.dst_port = mask->hdr.dst_port;
 886         tcp->mask.src_port = mask->hdr.src_port;
 887         /* Remove unwanted bits from values. */
 888         tcp->val.src_port &= tcp->mask.src_port;
 889         tcp->val.dst_port &= tcp->mask.dst_port;
 890         return 0;
 891 }
 892
 893 /**
 894  * Convert VXLAN item to Verbs specification.
 895  *
 896  * @param item[in]
 897  *   Item specification.
 898  * @param default_mask[in]
 899  *   Default bit-masks to use when item->mask is not provided.
 900  * @param data[in, out]
 901  *   User structure.
 902  */
 903 static int
 904 mlx5_flow_create_vxlan(const struct rte_flow_item *item,
 905                        const void *default_mask,
 906                        void *data)
 907 {
 908         const struct rte_flow_item_vxlan *spec = item->spec;
 909         const struct rte_flow_item_vxlan *mask = item->mask;
 910         struct mlx5_flow *flow = (struct mlx5_flow *)data;
 911         struct ibv_exp_flow_spec_tunnel *vxlan;
 912         unsigned int size = sizeof(struct ibv_exp_flow_spec_tunnel);
 913         union vni {
 914                 uint32_t vlan_id;
 915                 uint8_t vni[4];
 916         } id;
 917
 918         ++flow->ibv_attr->num_of_specs;
 919         flow->ibv_attr->priority = 0;
 920         id.vni[0] = 0;
 921         vxlan = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
 922         *vxlan = (struct ibv_exp_flow_spec_tunnel) {
 923                 .type = flow->inner | IBV_EXP_FLOW_SPEC_VXLAN_TUNNEL,
 924                 .size = size,
 925         };
 926         flow->inner = IBV_EXP_FLOW_SPEC_INNER;
 927         if (!spec)
 928                 return 0;
 929         if (!mask)
 930                 mask = default_mask;
 931         memcpy(&id.vni[1], spec->vni, 3);
 932         vxlan->val.tunnel_id = id.vlan_id;
 933         memcpy(&id.vni[1], mask->vni, 3);
 934         vxlan->mask.tunnel_id = id.vlan_id;
 935         /* Remove unwanted bits from values. */
 936         vxlan->val.tunnel_id &= vxlan->mask.tunnel_id;
 937         return 0;
 938 }
 939
 940 /**
 941  * Convert mark/flag action to Verbs specification.
 942  *
 943  * @param flow
 944  *   Pointer to MLX5 flow structure.
 945  * @param mark_id
 946  *   Mark identifier.
 947  */
 948 static int
 949 mlx5_flow_create_flag_mark(struct mlx5_flow *flow, uint32_t mark_id)
 950 {
 951         struct ibv_exp_flow_spec_action_tag *tag;
 952         unsigned int size = sizeof(struct ibv_exp_flow_spec_action_tag);
 953
 954         tag = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
 955         *tag = (struct ibv_exp_flow_spec_action_tag){
 956                 .type = IBV_EXP_FLOW_SPEC_ACTION_TAG,
 957                 .size = size,
 958                 .tag_id = mlx5_flow_mark_set(mark_id),
 959         };
 960         ++flow->ibv_attr->num_of_specs;
 961         return 0;
 962 }
 963
 964 /**
 965  * Complete flow rule creation with a drop queue.
 966  *
 967  * @param priv
 968  *   Pointer to private structure.
 969  * @param flow
 970  *   MLX5 flow attributes (filled by mlx5_flow_validate()).
 971  * @param[out] error
 972  *   Perform verbose error reporting if not NULL.
 973  *
 974  * @return
 975  *   A flow if the rule could be created.
 976  */
 977 static struct rte_flow *
 978 priv_flow_create_action_queue_drop(struct priv *priv,
 979                                    struct mlx5_flow *flow,
 980                                    struct rte_flow_error *error)
 981 {
 982         struct rte_flow *rte_flow;
 983
 984         assert(priv->pd);
 985         assert(priv->ctx);
 986         rte_flow = rte_calloc(__func__, 1, sizeof(*rte_flow), 0);
 987         if (!rte_flow) {
 988                 rte_flow_error_set(error, ENOMEM, RTE_FLOW_ERROR_TYPE_HANDLE,
 989                                    NULL, "cannot allocate flow memory");
 990                 return NULL;
 991         }
 992         rte_flow->drop = 1;
 993         rte_flow->ibv_attr = flow->ibv_attr;
 994         rte_flow->qp = priv->flow_drop_queue->qp;
 995         if (!priv->started)
 996                 return rte_flow;
 997         rte_flow->ibv_flow = ibv_exp_create_flow(rte_flow->qp,
 998                                                  rte_flow->ibv_attr);
 999         if (!rte_flow->ibv_flow) {
1000                 rte_flow_error_set(error, ENOMEM, RTE_FLOW_ERROR_TYPE_HANDLE,
1001                                    NULL, "flow rule creation failure");
1002                 goto error;
1003         }
1004         return rte_flow;
1005 error:
1006         assert(rte_flow);
1007         rte_free(rte_flow);
1008         return NULL;
1009 }
1010
1011 /**
1012  * Complete flow rule creation.
1013  *
1014  * @param priv
1015  *   Pointer to private structure.
1016  * @param flow
1017  *   MLX5 flow attributes (filled by mlx5_flow_validate()).
1018  * @param action
1019  *   Target action structure.
1020  * @param[out] error
1021  *   Perform verbose error reporting if not NULL.
1022  *
1023  * @return
1024  *   A flow if the rule could be created.
1025  */
1026 static struct rte_flow *
1027 priv_flow_create_action_queue(struct priv *priv,
1028                               struct mlx5_flow *flow,
1029                               struct mlx5_flow_action *action,
1030                               struct rte_flow_error *error)
1031 {
1032         struct rte_flow *rte_flow;
1033         unsigned int i;
1034         unsigned int j;
1035         const unsigned int wqs_n = 1 << log2above(action->queues_n);
1036         struct ibv_exp_wq *wqs[wqs_n];
1037
1038         assert(priv->pd);
1039         assert(priv->ctx);
1040         assert(!action->drop);
1041         rte_flow = rte_calloc(__func__, 1, sizeof(*rte_flow) +
1042                               sizeof(*rte_flow->rxqs) * action->queues_n, 0);
1043         if (!rte_flow) {
1044                 rte_flow_error_set(error, ENOMEM, RTE_FLOW_ERROR_TYPE_HANDLE,
1045                                    NULL, "cannot allocate flow memory");
1046                 return NULL;
1047         }
1048         for (i = 0; i < action->queues_n; ++i) {
1049                 struct rxq_ctrl *rxq;
1050
1051                 rxq = container_of((*priv->rxqs)[action->queues[i]],
1052                                    struct rxq_ctrl, rxq);
1053                 wqs[i] = rxq->wq;
1054                 rte_flow->rxqs[i] = &rxq->rxq;
1055                 ++rte_flow->rxqs_n;
1056                 rxq->rxq.mark |= action->mark;
1057         }
1058         /* finalise indirection table. */
1059         for (j = 0; i < wqs_n; ++i, ++j) {
1060                 wqs[i] = wqs[j];
1061                 if (j == action->queues_n)
1062                         j = 0;
1063         }
1064         rte_flow->mark = action->mark;
1065         rte_flow->ibv_attr = flow->ibv_attr;
1066         rte_flow->hash_fields = flow->hash_fields;
1067         rte_flow->ind_table = ibv_exp_create_rwq_ind_table(
1068                 priv->ctx,
1069                 &(struct ibv_exp_rwq_ind_table_init_attr){
1070                         .pd = priv->pd,
1071                         .log_ind_tbl_size = log2above(action->queues_n),
1072                         .ind_tbl = wqs,
1073                         .comp_mask = 0,
1074                 });
1075         if (!rte_flow->ind_table) {
1076                 rte_flow_error_set(error, ENOMEM, RTE_FLOW_ERROR_TYPE_HANDLE,
1077                                    NULL, "cannot allocate indirection table");
1078                 goto error;
1079         }
1080         rte_flow->qp = ibv_exp_create_qp(
1081                 priv->ctx,
1082                 &(struct ibv_exp_qp_init_attr){
1083                         .qp_type = IBV_QPT_RAW_PACKET,
1084                         .comp_mask =
1085                                 IBV_EXP_QP_INIT_ATTR_PD |
1086                                 IBV_EXP_QP_INIT_ATTR_PORT |
1087                                 IBV_EXP_QP_INIT_ATTR_RX_HASH,
1088                         .pd = priv->pd,
1089                         .rx_hash_conf = &(struct ibv_exp_rx_hash_conf){
1090                                 .rx_hash_function =
1091                                         IBV_EXP_RX_HASH_FUNC_TOEPLITZ,
1092                                 .rx_hash_key_len = rss_hash_default_key_len,
1093                                 .rx_hash_key = rss_hash_default_key,
1094                                 .rx_hash_fields_mask = rte_flow->hash_fields,
1095                                 .rwq_ind_tbl = rte_flow->ind_table,
1096                         },
1097                         .port_num = priv->port,
1098                 });
1099         if (!rte_flow->qp) {
1100                 rte_flow_error_set(error, ENOMEM, RTE_FLOW_ERROR_TYPE_HANDLE,
1101                                    NULL, "cannot allocate QP");
1102                 goto error;
1103         }
1104         if (!priv->started)
1105                 return rte_flow;
1106         rte_flow->ibv_flow = ibv_exp_create_flow(rte_flow->qp,
1107                                                  rte_flow->ibv_attr);
1108         if (!rte_flow->ibv_flow) {
1109                 rte_flow_error_set(error, ENOMEM, RTE_FLOW_ERROR_TYPE_HANDLE,
1110                                    NULL, "flow rule creation failure");
1111                 goto error;
1112         }
1113         return rte_flow;
1114 error:
1115         assert(rte_flow);
1116         if (rte_flow->qp)
1117                 ibv_destroy_qp(rte_flow->qp);
1118         if (rte_flow->ind_table)
1119                 ibv_exp_destroy_rwq_ind_table(rte_flow->ind_table);
1120         rte_free(rte_flow);
1121         return NULL;
1122 }
1123
1124 /**
1125  * Convert a flow.
1126  *
1127  * @param priv
1128  *   Pointer to private structure.
1129  * @param[in] attr
1130  *   Flow rule attributes.
1131  * @param[in] pattern
1132  *   Pattern specification (list terminated by the END pattern item).
1133  * @param[in] actions
1134  *   Associated actions (list terminated by the END action).
1135  * @param[out] error
1136  *   Perform verbose error reporting if not NULL.
1137  *
1138  * @return
1139  *   A flow on success, NULL otherwise.
1140  */
1141 static struct rte_flow *
1142 priv_flow_create(struct priv *priv,
1143                  const struct rte_flow_attr *attr,
1144                  const struct rte_flow_item items[],
1145                  const struct rte_flow_action actions[],
1146                  struct rte_flow_error *error)
1147 {
1148         struct rte_flow *rte_flow;
1149         struct mlx5_flow flow = { .offset = sizeof(struct ibv_exp_flow_attr), };
1150         struct mlx5_flow_action action = {
1151                 .queue = 0,
1152                 .drop = 0,
1153                 .mark = 0,
1154                 .mark_id = MLX5_FLOW_MARK_DEFAULT,
1155                 .queues_n = 0,
1156         };
1157         int err;
1158
1159         err = priv_flow_validate(priv, attr, items, actions, error, &flow,
1160                                  &action);
1161         if (err)
1162                 goto exit;
1163         flow.ibv_attr = rte_malloc(__func__, flow.offset, 0);
1164         flow.offset = sizeof(struct ibv_exp_flow_attr);
1165         if (!flow.ibv_attr) {
1166                 rte_flow_error_set(error, ENOMEM, RTE_FLOW_ERROR_TYPE_HANDLE,
1167                                    NULL, "cannot allocate ibv_attr memory");
1168                 goto exit;
1169         }
1170         *flow.ibv_attr = (struct ibv_exp_flow_attr){
1171                 .type = IBV_EXP_FLOW_ATTR_NORMAL,
1172                 .size = sizeof(struct ibv_exp_flow_attr),
1173                 .priority = attr->priority,
1174                 .num_of_specs = 0,
1175                 .port = 0,
1176                 .flags = 0,
1177                 .reserved = 0,
1178         };
1179         flow.inner = 0;
1180         flow.hash_fields = 0;
1181         claim_zero(priv_flow_validate(priv, attr, items, actions,
1182                                       error, &flow, &action));
1183         if (action.mark && !action.drop) {
1184                 mlx5_flow_create_flag_mark(&flow, action.mark_id);
1185                 flow.offset += sizeof(struct ibv_exp_flow_spec_action_tag);
1186         }
1187         if (action.drop)
1188                 rte_flow =
1189                         priv_flow_create_action_queue_drop(priv, &flow, error);
1190         else
1191                 rte_flow = priv_flow_create_action_queue(priv, &flow, &action,
1192                                                          error);
1193         if (!rte_flow)
1194                 goto exit;
1195         return rte_flow;
1196 exit:
1197         rte_free(flow.ibv_attr);
1198         return NULL;
1199 }
1200
1201 /**
1202  * Create a flow.
1203  *
1204  * @see rte_flow_create()
1205  * @see rte_flow_ops
1206  */
1207 struct rte_flow *
1208 mlx5_flow_create(struct rte_eth_dev *dev,
1209                  const struct rte_flow_attr *attr,
1210                  const struct rte_flow_item items[],
1211                  const struct rte_flow_action actions[],
1212                  struct rte_flow_error *error)
1213 {
1214         struct priv *priv = dev->data->dev_private;
1215         struct rte_flow *flow;
1216
1217         priv_lock(priv);
1218         flow = priv_flow_create(priv, attr, items, actions, error);
1219         if (flow) {
1220                 LIST_INSERT_HEAD(&priv->flows, flow, next);
1221                 DEBUG("Flow created %p", (void *)flow);
1222         }
1223         priv_unlock(priv);
1224         return flow;
1225 }
1226
1227 /**
1228  * Destroy a flow.
1229  *
1230  * @param priv
1231  *   Pointer to private structure.
1232  * @param[in] flow
1233  *   Flow to destroy.
1234  */
1235 static void
1236 priv_flow_destroy(struct priv *priv,
1237                   struct rte_flow *flow)
1238 {
1239         (void)priv;
1240         LIST_REMOVE(flow, next);
1241         if (flow->ibv_flow)
1242                 claim_zero(ibv_exp_destroy_flow(flow->ibv_flow));
1243         if (flow->drop)
1244                 goto free;
1245         if (flow->qp)
1246                 claim_zero(ibv_destroy_qp(flow->qp));
1247         if (flow->ind_table)
1248                 claim_zero(ibv_exp_destroy_rwq_ind_table(flow->ind_table));
1249         if (flow->drop && flow->wq)
1250                 claim_zero(ibv_exp_destroy_wq(flow->wq));
1251         if (flow->drop && flow->cq)
1252                 claim_zero(ibv_destroy_cq(flow->cq));
1253         if (flow->mark) {
1254                 struct rte_flow *tmp;
1255                 struct rxq *rxq;
1256                 uint32_t mark_n = 0;
1257                 uint32_t queue_n;
1258
1259                 /*
1260                  * To remove the mark from the queue, the queue must not be
1261                  * present in any other marked flow (RSS or not).
1262                  */
1263                 for (queue_n = 0; queue_n < flow->rxqs_n; ++queue_n) {
1264                         rxq = flow->rxqs[queue_n];
1265                         for (tmp = LIST_FIRST(&priv->flows);
1266                              tmp;
1267                              tmp = LIST_NEXT(tmp, next)) {
1268                                 uint32_t tqueue_n;
1269
1270                                 if (tmp->drop)
1271                                         continue;
1272                                 for (tqueue_n = 0;
1273                                      tqueue_n < tmp->rxqs_n;
1274                                      ++tqueue_n) {
1275                                         struct rxq *trxq;
1276
1277                                         trxq = tmp->rxqs[tqueue_n];
1278                                         if (rxq == trxq)
1279                                                 ++mark_n;
1280                                 }
1281                         }
1282                         rxq->mark = !!mark_n;
1283                 }
1284         }
1285 free:
1286         rte_free(flow->ibv_attr);
1287         DEBUG("Flow destroyed %p", (void *)flow);
1288         rte_free(flow);
1289 }
1290
1291 /**
1292  * Destroy a flow.
1293  *
1294  * @see rte_flow_destroy()
1295  * @see rte_flow_ops
1296  */
1297 int
1298 mlx5_flow_destroy(struct rte_eth_dev *dev,
1299                   struct rte_flow *flow,
1300                   struct rte_flow_error *error)
1301 {
1302         struct priv *priv = dev->data->dev_private;
1303
1304         (void)error;
1305         priv_lock(priv);
1306         priv_flow_destroy(priv, flow);
1307         priv_unlock(priv);
1308         return 0;
1309 }
1310
1311 /**
1312  * Destroy all flows.
1313  *
1314  * @param priv
1315  *   Pointer to private structure.
1316  */
1317 static void
1318 priv_flow_flush(struct priv *priv)
1319 {
1320         while (!LIST_EMPTY(&priv->flows)) {
1321                 struct rte_flow *flow;
1322
1323                 flow = LIST_FIRST(&priv->flows);
1324                 priv_flow_destroy(priv, flow);
1325         }
1326 }
1327
1328 /**
1329  * Destroy all flows.
1330  *
1331  * @see rte_flow_flush()
1332  * @see rte_flow_ops
1333  */
1334 int
1335 mlx5_flow_flush(struct rte_eth_dev *dev,
1336                 struct rte_flow_error *error)
1337 {
1338         struct priv *priv = dev->data->dev_private;
1339
1340         (void)error;
1341         priv_lock(priv);
1342         priv_flow_flush(priv);
1343         priv_unlock(priv);
1344         return 0;
1345 }
1346
1347 /**
1348  * Create drop queue.
1349  *
1350  * @param priv
1351  *   Pointer to private structure.
1352  *
1353  * @return
1354  *   0 on success.
1355  */
1356 static int
1357 priv_flow_create_drop_queue(struct priv *priv)
1358 {
1359         struct rte_flow_drop *fdq = NULL;
1360         unsigned int i;
1361
1362         assert(priv->pd);
1363         assert(priv->ctx);
1364         fdq = rte_calloc(__func__, 1, sizeof(*fdq), 0);
1365         if (!fdq) {
1366                 WARN("cannot allocate memory for drop queue");
1367                 goto error;
1368         }
1369         fdq->cq = ibv_exp_create_cq(priv->ctx, 1, NULL, NULL, 0,
1370                         &(struct ibv_exp_cq_init_attr){
1371                         .comp_mask = 0,
1372                         });
1373         if (!fdq->cq) {
1374                 WARN("cannot allocate CQ for drop queue");
1375                 goto error;
1376         }
1377         for (i = 0; i != MLX5_DROP_WQ_N; ++i) {
1378                 fdq->wqs[i] = ibv_exp_create_wq(priv->ctx,
1379                                 &(struct ibv_exp_wq_init_attr){
1380                                 .wq_type = IBV_EXP_WQT_RQ,
1381                                 .max_recv_wr = 1,
1382                                 .max_recv_sge = 1,
1383                                 .pd = priv->pd,
1384                                 .cq = fdq->cq,
1385                                 });
1386                 if (!fdq->wqs[i]) {
1387                         WARN("cannot allocate WQ for drop queue");
1388                         goto error;
1389                 }
1390         }
1391         fdq->ind_table = ibv_exp_create_rwq_ind_table(priv->ctx,
1392                         &(struct ibv_exp_rwq_ind_table_init_attr){
1393                         .pd = priv->pd,
1394                         .log_ind_tbl_size = 0,
1395                         .ind_tbl = fdq->wqs,
1396                         .comp_mask = 0,
1397                         });
1398         if (!fdq->ind_table) {
1399                 WARN("cannot allocate indirection table for drop queue");
1400                 goto error;
1401         }
1402         fdq->qp = ibv_exp_create_qp(priv->ctx,
1403                 &(struct ibv_exp_qp_init_attr){
1404                         .qp_type = IBV_QPT_RAW_PACKET,
1405                         .comp_mask =
1406                                 IBV_EXP_QP_INIT_ATTR_PD |
1407                                 IBV_EXP_QP_INIT_ATTR_PORT |
1408                                 IBV_EXP_QP_INIT_ATTR_RX_HASH,
1409                         .pd = priv->pd,
1410                         .rx_hash_conf = &(struct ibv_exp_rx_hash_conf){
1411                                 .rx_hash_function =
1412                                         IBV_EXP_RX_HASH_FUNC_TOEPLITZ,
1413                                 .rx_hash_key_len = rss_hash_default_key_len,
1414                                 .rx_hash_key = rss_hash_default_key,
1415                                 .rx_hash_fields_mask = 0,
1416                                 .rwq_ind_tbl = fdq->ind_table,
1417                                 },
1418                         .port_num = priv->port,
1419                         });
1420         if (!fdq->qp) {
1421                 WARN("cannot allocate QP for drop queue");
1422                 goto error;
1423         }
1424         priv->flow_drop_queue = fdq;
1425         return 0;
1426 error:
1427         if (fdq->qp)
1428                 claim_zero(ibv_destroy_qp(fdq->qp));
1429         if (fdq->ind_table)
1430                 claim_zero(ibv_exp_destroy_rwq_ind_table(fdq->ind_table));
1431         for (i = 0; i != MLX5_DROP_WQ_N; ++i) {
1432                 if (fdq->wqs[i])
1433                         claim_zero(ibv_exp_destroy_wq(fdq->wqs[i]));
1434         }
1435         if (fdq->cq)
1436                 claim_zero(ibv_destroy_cq(fdq->cq));
1437         if (fdq)
1438                 rte_free(fdq);
1439         priv->flow_drop_queue = NULL;
1440         return -1;
1441 }
1442
1443 /**
1444  * Delete drop queue.
1445  *
1446  * @param priv
1447  *   Pointer to private structure.
1448  */
1449 static void
1450 priv_flow_delete_drop_queue(struct priv *priv)
1451 {
1452         struct rte_flow_drop *fdq = priv->flow_drop_queue;
1453         unsigned int i;
1454
1455         claim_zero(ibv_destroy_qp(fdq->qp));
1456         claim_zero(ibv_exp_destroy_rwq_ind_table(fdq->ind_table));
1457         for (i = 0; i != MLX5_DROP_WQ_N; ++i) {
1458                 assert(fdq->wqs[i]);
1459                 claim_zero(ibv_exp_destroy_wq(fdq->wqs[i]));
1460         }
1461         claim_zero(ibv_destroy_cq(fdq->cq));
1462         rte_free(fdq);
1463         priv->flow_drop_queue = NULL;
1464 }
1465
1466 /**
1467  * Remove all flows.
1468  *
1469  * Called by dev_stop() to remove all flows.
1470  *
1471  * @param priv
1472  *   Pointer to private structure.
1473  */
1474 void
1475 priv_flow_stop(struct priv *priv)
1476 {
1477         struct rte_flow *flow;
1478
1479         for (flow = LIST_FIRST(&priv->flows);
1480              flow;
1481              flow = LIST_NEXT(flow, next)) {
1482                 claim_zero(ibv_exp_destroy_flow(flow->ibv_flow));
1483                 flow->ibv_flow = NULL;
1484                 if (flow->mark) {
1485                         unsigned int n;
1486
1487                         for (n = 0; n < flow->rxqs_n; ++n)
1488                                 flow->rxqs[n]->mark = 0;
1489                 }
1490                 DEBUG("Flow %p removed", (void *)flow);
1491         }
1492         priv_flow_delete_drop_queue(priv);
1493 }
1494
1495 /**
1496  * Add all flows.
1497  *
1498  * @param priv
1499  *   Pointer to private structure.
1500  *
1501  * @return
1502  *   0 on success, a errno value otherwise and rte_errno is set.
1503  */
1504 int
1505 priv_flow_start(struct priv *priv)
1506 {
1507         int ret;
1508         struct rte_flow *flow;
1509
1510         ret = priv_flow_create_drop_queue(priv);
1511         if (ret)
1512                 return -1;
1513         for (flow = LIST_FIRST(&priv->flows);
1514              flow;
1515              flow = LIST_NEXT(flow, next)) {
1516                 struct ibv_qp *qp;
1517
1518                 if (flow->drop)
1519                         qp = priv->flow_drop_queue->qp;
1520                 else
1521                         qp = flow->qp;
1522                 flow->ibv_flow = ibv_exp_create_flow(qp, flow->ibv_attr);
1523                 if (!flow->ibv_flow) {
1524                         DEBUG("Flow %p cannot be applied", (void *)flow);
1525                         rte_errno = EINVAL;
1526                         return rte_errno;
1527                 }
1528                 DEBUG("Flow %p applied", (void *)flow);
1529                 if (flow->mark) {
1530                         unsigned int n;
1531
1532                         for (n = 0; n < flow->rxqs_n; ++n)
1533                                 flow->rxqs[n]->mark = 1;
1534                 }
1535         }
1536         return 0;
1537 }