drivers/net/mlx5/mlx5_flow.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright 2016 6WIND S.A.
   5  *   Copyright 2016 Mellanox.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of 6WIND S.A. nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include <sys/queue.h>
  35 #include <string.h>
  36
  37 /* Verbs header. */
  38 /* ISO C doesn't support unnamed structs/unions, disabling -pedantic. */
  39 #ifdef PEDANTIC
  40 #pragma GCC diagnostic ignored "-Wpedantic"
  41 #endif
  42 #include <infiniband/verbs.h>
  43 #ifdef PEDANTIC
  44 #pragma GCC diagnostic error "-Wpedantic"
  45 #endif
  46
  47 #include <rte_ethdev.h>
  48 #include <rte_flow.h>
  49 #include <rte_flow_driver.h>
  50 #include <rte_malloc.h>
  51
  52 #include "mlx5.h"
  53 #include "mlx5_prm.h"
  54
  55 static int
  56 mlx5_flow_create_eth(const struct rte_flow_item *item,
  57                      const void *default_mask,
  58                      void *data);
  59
  60 static int
  61 mlx5_flow_create_vlan(const struct rte_flow_item *item,
  62                       const void *default_mask,
  63                       void *data);
  64
  65 static int
  66 mlx5_flow_create_ipv4(const struct rte_flow_item *item,
  67                       const void *default_mask,
  68                       void *data);
  69
  70 static int
  71 mlx5_flow_create_ipv6(const struct rte_flow_item *item,
  72                       const void *default_mask,
  73                       void *data);
  74
  75 static int
  76 mlx5_flow_create_udp(const struct rte_flow_item *item,
  77                      const void *default_mask,
  78                      void *data);
  79
  80 static int
  81 mlx5_flow_create_tcp(const struct rte_flow_item *item,
  82                      const void *default_mask,
  83                      void *data);
  84
  85 static int
  86 mlx5_flow_create_vxlan(const struct rte_flow_item *item,
  87                        const void *default_mask,
  88                        void *data);
  89
  90 struct rte_flow {
  91         LIST_ENTRY(rte_flow) next; /**< Pointer to the next flow structure. */
  92         struct ibv_exp_flow_attr *ibv_attr; /**< Pointer to Verbs attributes. */
  93         struct ibv_exp_rwq_ind_table *ind_table; /**< Indirection table. */
  94         struct ibv_qp *qp; /**< Verbs queue pair. */
  95         struct ibv_exp_flow *ibv_flow; /**< Verbs flow. */
  96         struct ibv_exp_wq *wq; /**< Verbs work queue. */
  97         struct ibv_cq *cq; /**< Verbs completion queue. */
  98         struct rxq *rxq; /**< Pointer to the queue, NULL if drop queue. */
  99         uint32_t mark:1; /**< Set if the flow is marked. */
 100 };
 101
 102 /** Static initializer for items. */
 103 #define ITEMS(...) \
 104         (const enum rte_flow_item_type []){ \
 105                 __VA_ARGS__, RTE_FLOW_ITEM_TYPE_END, \
 106         }
 107
 108 /** Structure to generate a simple graph of layers supported by the NIC. */
 109 struct mlx5_flow_items {
 110         /** List of possible actions for these items. */
 111         const enum rte_flow_action_type *const actions;
 112         /** Bit-masks corresponding to the possibilities for the item. */
 113         const void *mask;
 114         /**
 115          * Default bit-masks to use when item->mask is not provided. When
 116          * \default_mask is also NULL, the full supported bit-mask (\mask) is
 117          * used instead.
 118          */
 119         const void *default_mask;
 120         /** Bit-masks size in bytes. */
 121         const unsigned int mask_sz;
 122         /**
 123          * Conversion function from rte_flow to NIC specific flow.
 124          *
 125          * @param item
 126          *   rte_flow item to convert.
 127          * @param default_mask
 128          *   Default bit-masks to use when item->mask is not provided.
 129          * @param data
 130          *   Internal structure to store the conversion.
 131          *
 132          * @return
 133          *   0 on success, negative value otherwise.
 134          */
 135         int (*convert)(const struct rte_flow_item *item,
 136                        const void *default_mask,
 137                        void *data);
 138         /** Size in bytes of the destination structure. */
 139         const unsigned int dst_sz;
 140         /** List of possible following items.  */
 141         const enum rte_flow_item_type *const items;
 142 };
 143
 144 /** Valid action for this PMD. */
 145 static const enum rte_flow_action_type valid_actions[] = {
 146         RTE_FLOW_ACTION_TYPE_DROP,
 147         RTE_FLOW_ACTION_TYPE_QUEUE,
 148         RTE_FLOW_ACTION_TYPE_MARK,
 149         RTE_FLOW_ACTION_TYPE_END,
 150 };
 151
 152 /** Graph of supported items and associated actions. */
 153 static const struct mlx5_flow_items mlx5_flow_items[] = {
 154         [RTE_FLOW_ITEM_TYPE_END] = {
 155                 .items = ITEMS(RTE_FLOW_ITEM_TYPE_ETH,
 156                                RTE_FLOW_ITEM_TYPE_VXLAN),
 157         },
 158         [RTE_FLOW_ITEM_TYPE_ETH] = {
 159                 .items = ITEMS(RTE_FLOW_ITEM_TYPE_VLAN,
 160                                RTE_FLOW_ITEM_TYPE_IPV4,
 161                                RTE_FLOW_ITEM_TYPE_IPV6),
 162                 .actions = valid_actions,
 163                 .mask = &(const struct rte_flow_item_eth){
 164                         .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 165                         .src.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 166                 },
 167                 .default_mask = &rte_flow_item_eth_mask,
 168                 .mask_sz = sizeof(struct rte_flow_item_eth),
 169                 .convert = mlx5_flow_create_eth,
 170                 .dst_sz = sizeof(struct ibv_exp_flow_spec_eth),
 171         },
 172         [RTE_FLOW_ITEM_TYPE_VLAN] = {
 173                 .items = ITEMS(RTE_FLOW_ITEM_TYPE_IPV4,
 174                                RTE_FLOW_ITEM_TYPE_IPV6),
 175                 .actions = valid_actions,
 176                 .mask = &(const struct rte_flow_item_vlan){
 177                         .tci = -1,
 178                 },
 179                 .default_mask = &rte_flow_item_vlan_mask,
 180                 .mask_sz = sizeof(struct rte_flow_item_vlan),
 181                 .convert = mlx5_flow_create_vlan,
 182                 .dst_sz = 0,
 183         },
 184         [RTE_FLOW_ITEM_TYPE_IPV4] = {
 185                 .items = ITEMS(RTE_FLOW_ITEM_TYPE_UDP,
 186                                RTE_FLOW_ITEM_TYPE_TCP),
 187                 .actions = valid_actions,
 188                 .mask = &(const struct rte_flow_item_ipv4){
 189                         .hdr = {
 190                                 .src_addr = -1,
 191                                 .dst_addr = -1,
 192                                 .type_of_service = -1,
 193                                 .next_proto_id = -1,
 194                         },
 195                 },
 196                 .default_mask = &rte_flow_item_ipv4_mask,
 197                 .mask_sz = sizeof(struct rte_flow_item_ipv4),
 198                 .convert = mlx5_flow_create_ipv4,
 199                 .dst_sz = sizeof(struct ibv_exp_flow_spec_ipv4_ext),
 200         },
 201         [RTE_FLOW_ITEM_TYPE_IPV6] = {
 202                 .items = ITEMS(RTE_FLOW_ITEM_TYPE_UDP,
 203                                RTE_FLOW_ITEM_TYPE_TCP),
 204                 .actions = valid_actions,
 205                 .mask = &(const struct rte_flow_item_ipv6){
 206                         .hdr = {
 207                                 .src_addr = {
 208                                         0xff, 0xff, 0xff, 0xff,
 209                                         0xff, 0xff, 0xff, 0xff,
 210                                         0xff, 0xff, 0xff, 0xff,
 211                                         0xff, 0xff, 0xff, 0xff,
 212                                 },
 213                                 .dst_addr = {
 214                                         0xff, 0xff, 0xff, 0xff,
 215                                         0xff, 0xff, 0xff, 0xff,
 216                                         0xff, 0xff, 0xff, 0xff,
 217                                         0xff, 0xff, 0xff, 0xff,
 218                                 },
 219                         },
 220                 },
 221                 .default_mask = &rte_flow_item_ipv6_mask,
 222                 .mask_sz = sizeof(struct rte_flow_item_ipv6),
 223                 .convert = mlx5_flow_create_ipv6,
 224                 .dst_sz = sizeof(struct ibv_exp_flow_spec_ipv6),
 225         },
 226         [RTE_FLOW_ITEM_TYPE_UDP] = {
 227                 .items = ITEMS(RTE_FLOW_ITEM_TYPE_VXLAN),
 228                 .actions = valid_actions,
 229                 .mask = &(const struct rte_flow_item_udp){
 230                         .hdr = {
 231                                 .src_port = -1,
 232                                 .dst_port = -1,
 233                         },
 234                 },
 235                 .default_mask = &rte_flow_item_udp_mask,
 236                 .mask_sz = sizeof(struct rte_flow_item_udp),
 237                 .convert = mlx5_flow_create_udp,
 238                 .dst_sz = sizeof(struct ibv_exp_flow_spec_tcp_udp),
 239         },
 240         [RTE_FLOW_ITEM_TYPE_TCP] = {
 241                 .actions = valid_actions,
 242                 .mask = &(const struct rte_flow_item_tcp){
 243                         .hdr = {
 244                                 .src_port = -1,
 245                                 .dst_port = -1,
 246                         },
 247                 },
 248                 .default_mask = &rte_flow_item_tcp_mask,
 249                 .mask_sz = sizeof(struct rte_flow_item_tcp),
 250                 .convert = mlx5_flow_create_tcp,
 251                 .dst_sz = sizeof(struct ibv_exp_flow_spec_tcp_udp),
 252         },
 253         [RTE_FLOW_ITEM_TYPE_VXLAN] = {
 254                 .items = ITEMS(RTE_FLOW_ITEM_TYPE_ETH),
 255                 .actions = valid_actions,
 256                 .mask = &(const struct rte_flow_item_vxlan){
 257                         .vni = "\xff\xff\xff",
 258                 },
 259                 .default_mask = &rte_flow_item_vxlan_mask,
 260                 .mask_sz = sizeof(struct rte_flow_item_vxlan),
 261                 .convert = mlx5_flow_create_vxlan,
 262                 .dst_sz = sizeof(struct ibv_exp_flow_spec_tunnel),
 263         },
 264 };
 265
 266 /** Structure to pass to the conversion function. */
 267 struct mlx5_flow {
 268         struct ibv_exp_flow_attr *ibv_attr; /**< Verbs attribute. */
 269         unsigned int offset; /**< Offset in bytes in the ibv_attr buffer. */
 270         uint32_t inner; /**< Set once VXLAN is encountered. */
 271 };
 272
 273 struct mlx5_flow_action {
 274         uint32_t queue:1; /**< Target is a receive queue. */
 275         uint32_t drop:1; /**< Target is a drop queue. */
 276         uint32_t mark:1; /**< Mark is present in the flow. */
 277         uint32_t queue_id; /**< Identifier of the queue. */
 278         uint32_t mark_id; /**< Mark identifier. */
 279 };
 280
 281 /**
 282  * Check support for a given item.
 283  *
 284  * @param item[in]
 285  *   Item specification.
 286  * @param mask[in]
 287  *   Bit-masks covering supported fields to compare with spec, last and mask in
 288  *   \item.
 289  * @param size
 290  *   Bit-Mask size in bytes.
 291  *
 292  * @return
 293  *   0 on success.
 294  */
 295 static int
 296 mlx5_flow_item_validate(const struct rte_flow_item *item,
 297                         const uint8_t *mask, unsigned int size)
 298 {
 299         int ret = 0;
 300
 301         if (!item->spec && (item->mask || item->last))
 302                 return -1;
 303         if (item->spec && !item->mask) {
 304                 unsigned int i;
 305                 const uint8_t *spec = item->spec;
 306
 307                 for (i = 0; i < size; ++i)
 308                         if ((spec[i] | mask[i]) != mask[i])
 309                                 return -1;
 310         }
 311         if (item->last && !item->mask) {
 312                 unsigned int i;
 313                 const uint8_t *spec = item->last;
 314
 315                 for (i = 0; i < size; ++i)
 316                         if ((spec[i] | mask[i]) != mask[i])
 317                                 return -1;
 318         }
 319         if (item->mask) {
 320                 unsigned int i;
 321                 const uint8_t *spec = item->mask;
 322
 323                 for (i = 0; i < size; ++i)
 324                         if ((spec[i] | mask[i]) != mask[i])
 325                                 return -1;
 326         }
 327         if (item->spec && item->last) {
 328                 uint8_t spec[size];
 329                 uint8_t last[size];
 330                 const uint8_t *apply = mask;
 331                 unsigned int i;
 332
 333                 if (item->mask)
 334                         apply = item->mask;
 335                 for (i = 0; i < size; ++i) {
 336                         spec[i] = ((const uint8_t *)item->spec)[i] & apply[i];
 337                         last[i] = ((const uint8_t *)item->last)[i] & apply[i];
 338                 }
 339                 ret = memcmp(spec, last, size);
 340         }
 341         return ret;
 342 }
 343
 344 /**
 345  * Validate a flow supported by the NIC.
 346  *
 347  * @param priv
 348  *   Pointer to private structure.
 349  * @param[in] attr
 350  *   Flow rule attributes.
 351  * @param[in] pattern
 352  *   Pattern specification (list terminated by the END pattern item).
 353  * @param[in] actions
 354  *   Associated actions (list terminated by the END action).
 355  * @param[out] error
 356  *   Perform verbose error reporting if not NULL.
 357  * @param[in, out] flow
 358  *   Flow structure to update.
 359  *
 360  * @return
 361  *   0 on success, a negative errno value otherwise and rte_errno is set.
 362  */
 363 static int
 364 priv_flow_validate(struct priv *priv,
 365                    const struct rte_flow_attr *attr,
 366                    const struct rte_flow_item items[],
 367                    const struct rte_flow_action actions[],
 368                    struct rte_flow_error *error,
 369                    struct mlx5_flow *flow)
 370 {
 371         const struct mlx5_flow_items *cur_item = mlx5_flow_items;
 372         struct mlx5_flow_action action = {
 373                 .queue = 0,
 374                 .drop = 0,
 375                 .mark = 0,
 376         };
 377
 378         (void)priv;
 379         if (attr->group) {
 380                 rte_flow_error_set(error, ENOTSUP,
 381                                    RTE_FLOW_ERROR_TYPE_ATTR_GROUP,
 382                                    NULL,
 383                                    "groups are not supported");
 384                 return -rte_errno;
 385         }
 386         if (attr->priority) {
 387                 rte_flow_error_set(error, ENOTSUP,
 388                                    RTE_FLOW_ERROR_TYPE_ATTR_PRIORITY,
 389                                    NULL,
 390                                    "priorities are not supported");
 391                 return -rte_errno;
 392         }
 393         if (attr->egress) {
 394                 rte_flow_error_set(error, ENOTSUP,
 395                                    RTE_FLOW_ERROR_TYPE_ATTR_EGRESS,
 396                                    NULL,
 397                                    "egress is not supported");
 398                 return -rte_errno;
 399         }
 400         if (!attr->ingress) {
 401                 rte_flow_error_set(error, ENOTSUP,
 402                                    RTE_FLOW_ERROR_TYPE_ATTR_INGRESS,
 403                                    NULL,
 404                                    "only ingress is supported");
 405                 return -rte_errno;
 406         }
 407         for (; items->type != RTE_FLOW_ITEM_TYPE_END; ++items) {
 408                 const struct mlx5_flow_items *token = NULL;
 409                 unsigned int i;
 410                 int err;
 411
 412                 if (items->type == RTE_FLOW_ITEM_TYPE_VOID)
 413                         continue;
 414                 for (i = 0;
 415                      cur_item->items &&
 416                      cur_item->items[i] != RTE_FLOW_ITEM_TYPE_END;
 417                      ++i) {
 418                         if (cur_item->items[i] == items->type) {
 419                                 token = &mlx5_flow_items[items->type];
 420                                 break;
 421                         }
 422                 }
 423                 if (!token)
 424                         goto exit_item_not_supported;
 425                 cur_item = token;
 426                 err = mlx5_flow_item_validate(items,
 427                                               (const uint8_t *)cur_item->mask,
 428                                               cur_item->mask_sz);
 429                 if (err)
 430                         goto exit_item_not_supported;
 431                 if (flow->ibv_attr && cur_item->convert) {
 432                         err = cur_item->convert(items,
 433                                                 (cur_item->default_mask ?
 434                                                  cur_item->default_mask :
 435                                                  cur_item->mask),
 436                                                 flow);
 437                         if (err)
 438                                 goto exit_item_not_supported;
 439                 }
 440                 flow->offset += cur_item->dst_sz;
 441         }
 442         for (; actions->type != RTE_FLOW_ACTION_TYPE_END; ++actions) {
 443                 if (actions->type == RTE_FLOW_ACTION_TYPE_VOID) {
 444                         continue;
 445                 } else if (actions->type == RTE_FLOW_ACTION_TYPE_DROP) {
 446                         action.drop = 1;
 447                 } else if (actions->type == RTE_FLOW_ACTION_TYPE_QUEUE) {
 448                         const struct rte_flow_action_queue *queue =
 449                                 (const struct rte_flow_action_queue *)
 450                                 actions->conf;
 451
 452                         if (!queue || (queue->index > (priv->rxqs_n - 1)))
 453                                 goto exit_action_not_supported;
 454                         action.queue = 1;
 455                 } else if (actions->type == RTE_FLOW_ACTION_TYPE_MARK) {
 456                         const struct rte_flow_action_mark *mark =
 457                                 (const struct rte_flow_action_mark *)
 458                                 actions->conf;
 459
 460                         if (!mark) {
 461                                 rte_flow_error_set(error, EINVAL,
 462                                                    RTE_FLOW_ERROR_TYPE_ACTION,
 463                                                    actions,
 464                                                    "mark must be defined");
 465                                 return -rte_errno;
 466                         } else if (mark->id >= MLX5_FLOW_MARK_MAX) {
 467                                 rte_flow_error_set(error, ENOTSUP,
 468                                                    RTE_FLOW_ERROR_TYPE_ACTION,
 469                                                    actions,
 470                                                    "mark must be between 0"
 471                                                    " and 16777199");
 472                                 return -rte_errno;
 473                         }
 474                         action.mark = 1;
 475                 } else {
 476                         goto exit_action_not_supported;
 477                 }
 478         }
 479         if (action.mark && !flow->ibv_attr && !action.drop)
 480                 flow->offset += sizeof(struct ibv_exp_flow_spec_action_tag);
 481         if (!action.queue && !action.drop) {
 482                 rte_flow_error_set(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_HANDLE,
 483                                    NULL, "no valid action");
 484                 return -rte_errno;
 485         }
 486         return 0;
 487 exit_item_not_supported:
 488         rte_flow_error_set(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ITEM,
 489                            items, "item not supported");
 490         return -rte_errno;
 491 exit_action_not_supported:
 492         rte_flow_error_set(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ACTION,
 493                            actions, "action not supported");
 494         return -rte_errno;
 495 }
 496
 497 /**
 498  * Validate a flow supported by the NIC.
 499  *
 500  * @see rte_flow_validate()
 501  * @see rte_flow_ops
 502  */
 503 int
 504 mlx5_flow_validate(struct rte_eth_dev *dev,
 505                    const struct rte_flow_attr *attr,
 506                    const struct rte_flow_item items[],
 507                    const struct rte_flow_action actions[],
 508                    struct rte_flow_error *error)
 509 {
 510         struct priv *priv = dev->data->dev_private;
 511         int ret;
 512         struct mlx5_flow flow = { .offset = sizeof(struct ibv_exp_flow_attr) };
 513
 514         priv_lock(priv);
 515         ret = priv_flow_validate(priv, attr, items, actions, error, &flow);
 516         priv_unlock(priv);
 517         return ret;
 518 }
 519
 520 /**
 521  * Convert Ethernet item to Verbs specification.
 522  *
 523  * @param item[in]
 524  *   Item specification.
 525  * @param default_mask[in]
 526  *   Default bit-masks to use when item->mask is not provided.
 527  * @param data[in, out]
 528  *   User structure.
 529  */
 530 static int
 531 mlx5_flow_create_eth(const struct rte_flow_item *item,
 532                      const void *default_mask,
 533                      void *data)
 534 {
 535         const struct rte_flow_item_eth *spec = item->spec;
 536         const struct rte_flow_item_eth *mask = item->mask;
 537         struct mlx5_flow *flow = (struct mlx5_flow *)data;
 538         struct ibv_exp_flow_spec_eth *eth;
 539         const unsigned int eth_size = sizeof(struct ibv_exp_flow_spec_eth);
 540         unsigned int i;
 541
 542         ++flow->ibv_attr->num_of_specs;
 543         flow->ibv_attr->priority = 2;
 544         eth = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
 545         *eth = (struct ibv_exp_flow_spec_eth) {
 546                 .type = flow->inner | IBV_EXP_FLOW_SPEC_ETH,
 547                 .size = eth_size,
 548         };
 549         if (!spec)
 550                 return 0;
 551         if (!mask)
 552                 mask = default_mask;
 553         memcpy(eth->val.dst_mac, spec->dst.addr_bytes, ETHER_ADDR_LEN);
 554         memcpy(eth->val.src_mac, spec->src.addr_bytes, ETHER_ADDR_LEN);
 555         memcpy(eth->mask.dst_mac, mask->dst.addr_bytes, ETHER_ADDR_LEN);
 556         memcpy(eth->mask.src_mac, mask->src.addr_bytes, ETHER_ADDR_LEN);
 557         /* Remove unwanted bits from values. */
 558         for (i = 0; i < ETHER_ADDR_LEN; ++i) {
 559                 eth->val.dst_mac[i] &= eth->mask.dst_mac[i];
 560                 eth->val.src_mac[i] &= eth->mask.src_mac[i];
 561         }
 562         return 0;
 563 }
 564
 565 /**
 566  * Convert VLAN item to Verbs specification.
 567  *
 568  * @param item[in]
 569  *   Item specification.
 570  * @param default_mask[in]
 571  *   Default bit-masks to use when item->mask is not provided.
 572  * @param data[in, out]
 573  *   User structure.
 574  */
 575 static int
 576 mlx5_flow_create_vlan(const struct rte_flow_item *item,
 577                       const void *default_mask,
 578                       void *data)
 579 {
 580         const struct rte_flow_item_vlan *spec = item->spec;
 581         const struct rte_flow_item_vlan *mask = item->mask;
 582         struct mlx5_flow *flow = (struct mlx5_flow *)data;
 583         struct ibv_exp_flow_spec_eth *eth;
 584         const unsigned int eth_size = sizeof(struct ibv_exp_flow_spec_eth);
 585
 586         eth = (void *)((uintptr_t)flow->ibv_attr + flow->offset - eth_size);
 587         if (!spec)
 588                 return 0;
 589         if (!mask)
 590                 mask = default_mask;
 591         eth->val.vlan_tag = spec->tci;
 592         eth->mask.vlan_tag = mask->tci;
 593         eth->val.vlan_tag &= eth->mask.vlan_tag;
 594         return 0;
 595 }
 596
 597 /**
 598  * Convert IPv4 item to Verbs specification.
 599  *
 600  * @param item[in]
 601  *   Item specification.
 602  * @param default_mask[in]
 603  *   Default bit-masks to use when item->mask is not provided.
 604  * @param data[in, out]
 605  *   User structure.
 606  */
 607 static int
 608 mlx5_flow_create_ipv4(const struct rte_flow_item *item,
 609                       const void *default_mask,
 610                       void *data)
 611 {
 612         const struct rte_flow_item_ipv4 *spec = item->spec;
 613         const struct rte_flow_item_ipv4 *mask = item->mask;
 614         struct mlx5_flow *flow = (struct mlx5_flow *)data;
 615         struct ibv_exp_flow_spec_ipv4_ext *ipv4;
 616         unsigned int ipv4_size = sizeof(struct ibv_exp_flow_spec_ipv4_ext);
 617
 618         ++flow->ibv_attr->num_of_specs;
 619         flow->ibv_attr->priority = 1;
 620         ipv4 = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
 621         *ipv4 = (struct ibv_exp_flow_spec_ipv4_ext) {
 622                 .type = flow->inner | IBV_EXP_FLOW_SPEC_IPV4_EXT,
 623                 .size = ipv4_size,
 624         };
 625         if (!spec)
 626                 return 0;
 627         if (!mask)
 628                 mask = default_mask;
 629         ipv4->val = (struct ibv_exp_flow_ipv4_ext_filter){
 630                 .src_ip = spec->hdr.src_addr,
 631                 .dst_ip = spec->hdr.dst_addr,
 632                 .proto = spec->hdr.next_proto_id,
 633                 .tos = spec->hdr.type_of_service,
 634         };
 635         ipv4->mask = (struct ibv_exp_flow_ipv4_ext_filter){
 636                 .src_ip = mask->hdr.src_addr,
 637                 .dst_ip = mask->hdr.dst_addr,
 638                 .proto = mask->hdr.next_proto_id,
 639                 .tos = mask->hdr.type_of_service,
 640         };
 641         /* Remove unwanted bits from values. */
 642         ipv4->val.src_ip &= ipv4->mask.src_ip;
 643         ipv4->val.dst_ip &= ipv4->mask.dst_ip;
 644         ipv4->val.proto &= ipv4->mask.proto;
 645         ipv4->val.tos &= ipv4->mask.tos;
 646         return 0;
 647 }
 648
 649 /**
 650  * Convert IPv6 item to Verbs specification.
 651  *
 652  * @param item[in]
 653  *   Item specification.
 654  * @param default_mask[in]
 655  *   Default bit-masks to use when item->mask is not provided.
 656  * @param data[in, out]
 657  *   User structure.
 658  */
 659 static int
 660 mlx5_flow_create_ipv6(const struct rte_flow_item *item,
 661                       const void *default_mask,
 662                       void *data)
 663 {
 664         const struct rte_flow_item_ipv6 *spec = item->spec;
 665         const struct rte_flow_item_ipv6 *mask = item->mask;
 666         struct mlx5_flow *flow = (struct mlx5_flow *)data;
 667         struct ibv_exp_flow_spec_ipv6 *ipv6;
 668         unsigned int ipv6_size = sizeof(struct ibv_exp_flow_spec_ipv6);
 669         unsigned int i;
 670
 671         ++flow->ibv_attr->num_of_specs;
 672         flow->ibv_attr->priority = 1;
 673         ipv6 = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
 674         *ipv6 = (struct ibv_exp_flow_spec_ipv6) {
 675                 .type = flow->inner | IBV_EXP_FLOW_SPEC_IPV6,
 676                 .size = ipv6_size,
 677         };
 678         if (!spec)
 679                 return 0;
 680         if (!mask)
 681                 mask = default_mask;
 682         memcpy(ipv6->val.src_ip, spec->hdr.src_addr,
 683                RTE_DIM(ipv6->val.src_ip));
 684         memcpy(ipv6->val.dst_ip, spec->hdr.dst_addr,
 685                RTE_DIM(ipv6->val.dst_ip));
 686         memcpy(ipv6->mask.src_ip, mask->hdr.src_addr,
 687                RTE_DIM(ipv6->mask.src_ip));
 688         memcpy(ipv6->mask.dst_ip, mask->hdr.dst_addr,
 689                RTE_DIM(ipv6->mask.dst_ip));
 690         /* Remove unwanted bits from values. */
 691         for (i = 0; i < RTE_DIM(ipv6->val.src_ip); ++i) {
 692                 ipv6->val.src_ip[i] &= ipv6->mask.src_ip[i];
 693                 ipv6->val.dst_ip[i] &= ipv6->mask.dst_ip[i];
 694         }
 695         return 0;
 696 }
 697
 698 /**
 699  * Convert UDP item to Verbs specification.
 700  *
 701  * @param item[in]
 702  *   Item specification.
 703  * @param default_mask[in]
 704  *   Default bit-masks to use when item->mask is not provided.
 705  * @param data[in, out]
 706  *   User structure.
 707  */
 708 static int
 709 mlx5_flow_create_udp(const struct rte_flow_item *item,
 710                      const void *default_mask,
 711                      void *data)
 712 {
 713         const struct rte_flow_item_udp *spec = item->spec;
 714         const struct rte_flow_item_udp *mask = item->mask;
 715         struct mlx5_flow *flow = (struct mlx5_flow *)data;
 716         struct ibv_exp_flow_spec_tcp_udp *udp;
 717         unsigned int udp_size = sizeof(struct ibv_exp_flow_spec_tcp_udp);
 718
 719         ++flow->ibv_attr->num_of_specs;
 720         flow->ibv_attr->priority = 0;
 721         udp = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
 722         *udp = (struct ibv_exp_flow_spec_tcp_udp) {
 723                 .type = flow->inner | IBV_EXP_FLOW_SPEC_UDP,
 724                 .size = udp_size,
 725         };
 726         if (!spec)
 727                 return 0;
 728         if (!mask)
 729                 mask = default_mask;
 730         udp->val.dst_port = spec->hdr.dst_port;
 731         udp->val.src_port = spec->hdr.src_port;
 732         udp->mask.dst_port = mask->hdr.dst_port;
 733         udp->mask.src_port = mask->hdr.src_port;
 734         /* Remove unwanted bits from values. */
 735         udp->val.src_port &= udp->mask.src_port;
 736         udp->val.dst_port &= udp->mask.dst_port;
 737         return 0;
 738 }
 739
 740 /**
 741  * Convert TCP item to Verbs specification.
 742  *
 743  * @param item[in]
 744  *   Item specification.
 745  * @param default_mask[in]
 746  *   Default bit-masks to use when item->mask is not provided.
 747  * @param data[in, out]
 748  *   User structure.
 749  */
 750 static int
 751 mlx5_flow_create_tcp(const struct rte_flow_item *item,
 752                      const void *default_mask,
 753                      void *data)
 754 {
 755         const struct rte_flow_item_tcp *spec = item->spec;
 756         const struct rte_flow_item_tcp *mask = item->mask;
 757         struct mlx5_flow *flow = (struct mlx5_flow *)data;
 758         struct ibv_exp_flow_spec_tcp_udp *tcp;
 759         unsigned int tcp_size = sizeof(struct ibv_exp_flow_spec_tcp_udp);
 760
 761         ++flow->ibv_attr->num_of_specs;
 762         flow->ibv_attr->priority = 0;
 763         tcp = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
 764         *tcp = (struct ibv_exp_flow_spec_tcp_udp) {
 765                 .type = flow->inner | IBV_EXP_FLOW_SPEC_TCP,
 766                 .size = tcp_size,
 767         };
 768         if (!spec)
 769                 return 0;
 770         if (!mask)
 771                 mask = default_mask;
 772         tcp->val.dst_port = spec->hdr.dst_port;
 773         tcp->val.src_port = spec->hdr.src_port;
 774         tcp->mask.dst_port = mask->hdr.dst_port;
 775         tcp->mask.src_port = mask->hdr.src_port;
 776         /* Remove unwanted bits from values. */
 777         tcp->val.src_port &= tcp->mask.src_port;
 778         tcp->val.dst_port &= tcp->mask.dst_port;
 779         return 0;
 780 }
 781
 782 /**
 783  * Convert VXLAN item to Verbs specification.
 784  *
 785  * @param item[in]
 786  *   Item specification.
 787  * @param default_mask[in]
 788  *   Default bit-masks to use when item->mask is not provided.
 789  * @param data[in, out]
 790  *   User structure.
 791  */
 792 static int
 793 mlx5_flow_create_vxlan(const struct rte_flow_item *item,
 794                        const void *default_mask,
 795                        void *data)
 796 {
 797         const struct rte_flow_item_vxlan *spec = item->spec;
 798         const struct rte_flow_item_vxlan *mask = item->mask;
 799         struct mlx5_flow *flow = (struct mlx5_flow *)data;
 800         struct ibv_exp_flow_spec_tunnel *vxlan;
 801         unsigned int size = sizeof(struct ibv_exp_flow_spec_tunnel);
 802         union vni {
 803                 uint32_t vlan_id;
 804                 uint8_t vni[4];
 805         } id;
 806
 807         ++flow->ibv_attr->num_of_specs;
 808         flow->ibv_attr->priority = 0;
 809         id.vni[0] = 0;
 810         vxlan = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
 811         *vxlan = (struct ibv_exp_flow_spec_tunnel) {
 812                 .type = flow->inner | IBV_EXP_FLOW_SPEC_VXLAN_TUNNEL,
 813                 .size = size,
 814         };
 815         flow->inner = IBV_EXP_FLOW_SPEC_INNER;
 816         if (!spec)
 817                 return 0;
 818         if (!mask)
 819                 mask = default_mask;
 820         memcpy(&id.vni[1], spec->vni, 3);
 821         vxlan->val.tunnel_id = id.vlan_id;
 822         memcpy(&id.vni[1], mask->vni, 3);
 823         vxlan->mask.tunnel_id = id.vlan_id;
 824         /* Remove unwanted bits from values. */
 825         vxlan->val.tunnel_id &= vxlan->mask.tunnel_id;
 826         return 0;
 827 }
 828
 829 /**
 830  * Convert mark/flag action to Verbs specification.
 831  *
 832  * @param flow
 833  *   Pointer to MLX5 flow structure.
 834  * @param mark_id
 835  *   Mark identifier.
 836  */
 837 static int
 838 mlx5_flow_create_flag_mark(struct mlx5_flow *flow, uint32_t mark_id)
 839 {
 840         struct ibv_exp_flow_spec_action_tag *tag;
 841         unsigned int size = sizeof(struct ibv_exp_flow_spec_action_tag);
 842
 843         tag = (void *)((uintptr_t)flow->ibv_attr + flow->offset);
 844         *tag = (struct ibv_exp_flow_spec_action_tag){
 845                 .type = IBV_EXP_FLOW_SPEC_ACTION_TAG,
 846                 .size = size,
 847                 .tag_id = mlx5_flow_mark_set(mark_id),
 848         };
 849         ++flow->ibv_attr->num_of_specs;
 850         return 0;
 851 }
 852
 853 /**
 854  * Complete flow rule creation.
 855  *
 856  * @param priv
 857  *   Pointer to private structure.
 858  * @param ibv_attr
 859  *   Verbs flow attributes.
 860  * @param action
 861  *   Target action structure.
 862  * @param[out] error
 863  *   Perform verbose error reporting if not NULL.
 864  *
 865  * @return
 866  *   A flow if the rule could be created.
 867  */
 868 static struct rte_flow *
 869 priv_flow_create_action_queue(struct priv *priv,
 870                               struct ibv_exp_flow_attr *ibv_attr,
 871                               struct mlx5_flow_action *action,
 872                               struct rte_flow_error *error)
 873 {
 874         struct rxq_ctrl *rxq;
 875         struct rte_flow *rte_flow;
 876
 877         assert(priv->pd);
 878         assert(priv->ctx);
 879         rte_flow = rte_calloc(__func__, 1, sizeof(*rte_flow), 0);
 880         if (!rte_flow) {
 881                 rte_flow_error_set(error, ENOMEM, RTE_FLOW_ERROR_TYPE_HANDLE,
 882                                    NULL, "cannot allocate flow memory");
 883                 return NULL;
 884         }
 885         if (action->drop) {
 886                 rte_flow->cq =
 887                         ibv_exp_create_cq(priv->ctx, 1, NULL, NULL, 0,
 888                                           &(struct ibv_exp_cq_init_attr){
 889                                                   .comp_mask = 0,
 890                                           });
 891                 if (!rte_flow->cq) {
 892                         rte_flow_error_set(error, ENOMEM,
 893                                            RTE_FLOW_ERROR_TYPE_HANDLE,
 894                                            NULL, "cannot allocate CQ");
 895                         goto error;
 896                 }
 897                 rte_flow->wq = ibv_exp_create_wq(priv->ctx,
 898                                                  &(struct ibv_exp_wq_init_attr){
 899                                                  .wq_type = IBV_EXP_WQT_RQ,
 900                                                  .max_recv_wr = 1,
 901                                                  .max_recv_sge = 1,
 902                                                  .pd = priv->pd,
 903                                                  .cq = rte_flow->cq,
 904                                                  });
 905         } else {
 906                 rxq = container_of((*priv->rxqs)[action->queue_id],
 907                                    struct rxq_ctrl, rxq);
 908                 rte_flow->rxq = &rxq->rxq;
 909                 rxq->rxq.mark |= action->mark;
 910                 rte_flow->wq = rxq->wq;
 911         }
 912         rte_flow->mark = action->mark;
 913         rte_flow->ibv_attr = ibv_attr;
 914         rte_flow->ind_table = ibv_exp_create_rwq_ind_table(
 915                 priv->ctx,
 916                 &(struct ibv_exp_rwq_ind_table_init_attr){
 917                         .pd = priv->pd,
 918                         .log_ind_tbl_size = 0,
 919                         .ind_tbl = &rte_flow->wq,
 920                         .comp_mask = 0,
 921                 });
 922         if (!rte_flow->ind_table) {
 923                 rte_flow_error_set(error, ENOMEM, RTE_FLOW_ERROR_TYPE_HANDLE,
 924                                    NULL, "cannot allocate indirection table");
 925                 goto error;
 926         }
 927         rte_flow->qp = ibv_exp_create_qp(
 928                 priv->ctx,
 929                 &(struct ibv_exp_qp_init_attr){
 930                         .qp_type = IBV_QPT_RAW_PACKET,
 931                         .comp_mask =
 932                                 IBV_EXP_QP_INIT_ATTR_PD |
 933                                 IBV_EXP_QP_INIT_ATTR_PORT |
 934                                 IBV_EXP_QP_INIT_ATTR_RX_HASH,
 935                         .pd = priv->pd,
 936                         .rx_hash_conf = &(struct ibv_exp_rx_hash_conf){
 937                                 .rx_hash_function =
 938                                         IBV_EXP_RX_HASH_FUNC_TOEPLITZ,
 939                                 .rx_hash_key_len = rss_hash_default_key_len,
 940                                 .rx_hash_key = rss_hash_default_key,
 941                                 .rx_hash_fields_mask = 0,
 942                                 .rwq_ind_tbl = rte_flow->ind_table,
 943                         },
 944                         .port_num = priv->port,
 945                 });
 946         if (!rte_flow->qp) {
 947                 rte_flow_error_set(error, ENOMEM, RTE_FLOW_ERROR_TYPE_HANDLE,
 948                                    NULL, "cannot allocate QP");
 949                 goto error;
 950         }
 951         rte_flow->ibv_flow = ibv_exp_create_flow(rte_flow->qp,
 952                                                  rte_flow->ibv_attr);
 953         if (!rte_flow->ibv_flow) {
 954                 rte_flow_error_set(error, ENOMEM, RTE_FLOW_ERROR_TYPE_HANDLE,
 955                                    NULL, "flow rule creation failure");
 956                 goto error;
 957         }
 958         return rte_flow;
 959 error:
 960         assert(rte_flow);
 961         if (rte_flow->qp)
 962                 ibv_destroy_qp(rte_flow->qp);
 963         if (rte_flow->ind_table)
 964                 ibv_exp_destroy_rwq_ind_table(rte_flow->ind_table);
 965         if (!rte_flow->rxq && rte_flow->wq)
 966                 ibv_exp_destroy_wq(rte_flow->wq);
 967         if (!rte_flow->rxq && rte_flow->cq)
 968                 ibv_destroy_cq(rte_flow->cq);
 969         rte_free(rte_flow->ibv_attr);
 970         rte_free(rte_flow);
 971         return NULL;
 972 }
 973
 974 /**
 975  * Convert a flow.
 976  *
 977  * @param priv
 978  *   Pointer to private structure.
 979  * @param[in] attr
 980  *   Flow rule attributes.
 981  * @param[in] pattern
 982  *   Pattern specification (list terminated by the END pattern item).
 983  * @param[in] actions
 984  *   Associated actions (list terminated by the END action).
 985  * @param[out] error
 986  *   Perform verbose error reporting if not NULL.
 987  *
 988  * @return
 989  *   A flow on success, NULL otherwise.
 990  */
 991 static struct rte_flow *
 992 priv_flow_create(struct priv *priv,
 993                  const struct rte_flow_attr *attr,
 994                  const struct rte_flow_item items[],
 995                  const struct rte_flow_action actions[],
 996                  struct rte_flow_error *error)
 997 {
 998         struct rte_flow *rte_flow;
 999         struct mlx5_flow_action action;
1000         struct mlx5_flow flow = { .offset = sizeof(struct ibv_exp_flow_attr), };
1001         int err;
1002
1003         err = priv_flow_validate(priv, attr, items, actions, error, &flow);
1004         if (err)
1005                 goto exit;
1006         flow.ibv_attr = rte_malloc(__func__, flow.offset, 0);
1007         flow.offset = sizeof(struct ibv_exp_flow_attr);
1008         if (!flow.ibv_attr) {
1009                 rte_flow_error_set(error, ENOMEM, RTE_FLOW_ERROR_TYPE_HANDLE,
1010                                    NULL, "cannot allocate ibv_attr memory");
1011                 goto exit;
1012         }
1013         *flow.ibv_attr = (struct ibv_exp_flow_attr){
1014                 .type = IBV_EXP_FLOW_ATTR_NORMAL,
1015                 .size = sizeof(struct ibv_exp_flow_attr),
1016                 .priority = attr->priority,
1017                 .num_of_specs = 0,
1018                 .port = 0,
1019                 .flags = 0,
1020                 .reserved = 0,
1021         };
1022         flow.inner = 0;
1023         claim_zero(priv_flow_validate(priv, attr, items, actions,
1024                                       error, &flow));
1025         action = (struct mlx5_flow_action){
1026                 .queue = 0,
1027                 .drop = 0,
1028                 .mark = 0,
1029                 .mark_id = MLX5_FLOW_MARK_DEFAULT,
1030         };
1031         for (; actions->type != RTE_FLOW_ACTION_TYPE_END; ++actions) {
1032                 if (actions->type == RTE_FLOW_ACTION_TYPE_VOID) {
1033                         continue;
1034                 } else if (actions->type == RTE_FLOW_ACTION_TYPE_QUEUE) {
1035                         action.queue = 1;
1036                         action.queue_id =
1037                                 ((const struct rte_flow_action_queue *)
1038                                  actions->conf)->index;
1039                 } else if (actions->type == RTE_FLOW_ACTION_TYPE_DROP) {
1040                         action.drop = 1;
1041                         action.mark = 0;
1042                 } else if (actions->type == RTE_FLOW_ACTION_TYPE_MARK) {
1043                         const struct rte_flow_action_mark *mark =
1044                                 (const struct rte_flow_action_mark *)
1045                                 actions->conf;
1046
1047                         if (mark)
1048                                 action.mark_id = mark->id;
1049                         action.mark = !action.drop;
1050                 } else {
1051                         rte_flow_error_set(error, ENOTSUP,
1052                                            RTE_FLOW_ERROR_TYPE_ACTION,
1053                                            actions, "unsupported action");
1054                         goto exit;
1055                 }
1056         }
1057         if (action.mark) {
1058                 mlx5_flow_create_flag_mark(&flow, action.mark_id);
1059                 flow.offset += sizeof(struct ibv_exp_flow_spec_action_tag);
1060         }
1061         rte_flow = priv_flow_create_action_queue(priv, flow.ibv_attr,
1062                                                  &action, error);
1063         return rte_flow;
1064 exit:
1065         rte_free(flow.ibv_attr);
1066         return NULL;
1067 }
1068
1069 /**
1070  * Create a flow.
1071  *
1072  * @see rte_flow_create()
1073  * @see rte_flow_ops
1074  */
1075 struct rte_flow *
1076 mlx5_flow_create(struct rte_eth_dev *dev,
1077                  const struct rte_flow_attr *attr,
1078                  const struct rte_flow_item items[],
1079                  const struct rte_flow_action actions[],
1080                  struct rte_flow_error *error)
1081 {
1082         struct priv *priv = dev->data->dev_private;
1083         struct rte_flow *flow;
1084
1085         priv_lock(priv);
1086         flow = priv_flow_create(priv, attr, items, actions, error);
1087         if (flow) {
1088                 LIST_INSERT_HEAD(&priv->flows, flow, next);
1089                 DEBUG("Flow created %p", (void *)flow);
1090         }
1091         priv_unlock(priv);
1092         return flow;
1093 }
1094
1095 /**
1096  * Destroy a flow.
1097  *
1098  * @param priv
1099  *   Pointer to private structure.
1100  * @param[in] flow
1101  *   Flow to destroy.
1102  */
1103 static void
1104 priv_flow_destroy(struct priv *priv,
1105                   struct rte_flow *flow)
1106 {
1107         (void)priv;
1108         LIST_REMOVE(flow, next);
1109         if (flow->ibv_flow)
1110                 claim_zero(ibv_exp_destroy_flow(flow->ibv_flow));
1111         if (flow->qp)
1112                 claim_zero(ibv_destroy_qp(flow->qp));
1113         if (flow->ind_table)
1114                 claim_zero(ibv_exp_destroy_rwq_ind_table(flow->ind_table));
1115         if (!flow->rxq && flow->wq)
1116                 claim_zero(ibv_exp_destroy_wq(flow->wq));
1117         if (!flow->rxq && flow->cq)
1118                 claim_zero(ibv_destroy_cq(flow->cq));
1119         if (flow->mark) {
1120                 struct rte_flow *tmp;
1121                 uint32_t mark_n = 0;
1122
1123                 for (tmp = LIST_FIRST(&priv->flows);
1124                      tmp;
1125                      tmp = LIST_NEXT(tmp, next)) {
1126                         if ((flow->rxq == tmp->rxq) && tmp->mark)
1127                                 ++mark_n;
1128                 }
1129                 flow->rxq->mark = !!mark_n;
1130         }
1131         rte_free(flow->ibv_attr);
1132         DEBUG("Flow destroyed %p", (void *)flow);
1133         rte_free(flow);
1134 }
1135
1136 /**
1137  * Destroy a flow.
1138  *
1139  * @see rte_flow_destroy()
1140  * @see rte_flow_ops
1141  */
1142 int
1143 mlx5_flow_destroy(struct rte_eth_dev *dev,
1144                   struct rte_flow *flow,
1145                   struct rte_flow_error *error)
1146 {
1147         struct priv *priv = dev->data->dev_private;
1148
1149         (void)error;
1150         priv_lock(priv);
1151         priv_flow_destroy(priv, flow);
1152         priv_unlock(priv);
1153         return 0;
1154 }
1155
1156 /**
1157  * Destroy all flows.
1158  *
1159  * @param priv
1160  *   Pointer to private structure.
1161  */
1162 static void
1163 priv_flow_flush(struct priv *priv)
1164 {
1165         while (!LIST_EMPTY(&priv->flows)) {
1166                 struct rte_flow *flow;
1167
1168                 flow = LIST_FIRST(&priv->flows);
1169                 priv_flow_destroy(priv, flow);
1170         }
1171 }
1172
1173 /**
1174  * Destroy all flows.
1175  *
1176  * @see rte_flow_flush()
1177  * @see rte_flow_ops
1178  */
1179 int
1180 mlx5_flow_flush(struct rte_eth_dev *dev,
1181                 struct rte_flow_error *error)
1182 {
1183         struct priv *priv = dev->data->dev_private;
1184
1185         (void)error;
1186         priv_lock(priv);
1187         priv_flow_flush(priv);
1188         priv_unlock(priv);
1189         return 0;
1190 }
1191
1192 /**
1193  * Remove all flows.
1194  *
1195  * Called by dev_stop() to remove all flows.
1196  *
1197  * @param priv
1198  *   Pointer to private structure.
1199  */
1200 void
1201 priv_flow_stop(struct priv *priv)
1202 {
1203         struct rte_flow *flow;
1204
1205         for (flow = LIST_FIRST(&priv->flows);
1206              flow;
1207              flow = LIST_NEXT(flow, next)) {
1208                 claim_zero(ibv_exp_destroy_flow(flow->ibv_flow));
1209                 flow->ibv_flow = NULL;
1210                 if (flow->mark)
1211                         flow->rxq->mark = 0;
1212                 DEBUG("Flow %p removed", (void *)flow);
1213         }
1214 }
1215
1216 /**
1217  * Add all flows.
1218  *
1219  * @param priv
1220  *   Pointer to private structure.
1221  *
1222  * @return
1223  *   0 on success, a errno value otherwise and rte_errno is set.
1224  */
1225 int
1226 priv_flow_start(struct priv *priv)
1227 {
1228         struct rte_flow *flow;
1229
1230         for (flow = LIST_FIRST(&priv->flows);
1231              flow;
1232              flow = LIST_NEXT(flow, next)) {
1233                 flow->ibv_flow = ibv_exp_create_flow(flow->qp,
1234                                                      flow->ibv_attr);
1235                 if (!flow->ibv_flow) {
1236                         DEBUG("Flow %p cannot be applied", (void *)flow);
1237                         rte_errno = EINVAL;
1238                         return rte_errno;
1239                 }
1240                 DEBUG("Flow %p applied", (void *)flow);
1241                 if (flow->rxq)
1242                         flow->rxq->mark |= flow->mark;
1243         }
1244         return 0;
1245 }