drivers/net/mlx5/mlx5_flow.c

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