drivers/net/mlx5/linux/mlx5_verbs.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright 2020 Mellanox Technologies, Ltd
   3  */
   4
   5 #include <stddef.h>
   6 #include <errno.h>
   7 #include <string.h>
   8 #include <stdint.h>
   9 #include <unistd.h>
  10 #include <inttypes.h>
  11 #include <sys/queue.h>
  12
  13 #include "mlx5_autoconf.h"
  14
  15 #include <rte_mbuf.h>
  16 #include <rte_malloc.h>
  17 #include <ethdev_driver.h>
  18 #include <rte_common.h>
  19
  20 #include <mlx5_glue.h>
  21 #include <mlx5_common.h>
  22 #include <mlx5_common_mr.h>
  23 #include <mlx5_verbs.h>
  24 #include <mlx5_rx.h>
  25 #include <mlx5_tx.h>
  26 #include <mlx5_utils.h>
  27 #include <mlx5_malloc.h>
  28
  29 /**
  30  * Modify Rx WQ vlan stripping offload
  31  *
  32  * @param rxq
  33  *   Rx queue.
  34  *
  35  * @return 0 on success, non-0 otherwise
  36  */
  37 static int
  38 mlx5_rxq_obj_modify_wq_vlan_strip(struct mlx5_rxq_priv *rxq, int on)
  39 {
  40         uint16_t vlan_offloads =
  41                 (on ? IBV_WQ_FLAGS_CVLAN_STRIPPING : 0) |
  42                 0;
  43         struct ibv_wq_attr mod;
  44         mod = (struct ibv_wq_attr){
  45                 .attr_mask = IBV_WQ_ATTR_FLAGS,
  46                 .flags_mask = IBV_WQ_FLAGS_CVLAN_STRIPPING,
  47                 .flags = vlan_offloads,
  48         };
  49
  50         return mlx5_glue->modify_wq(rxq->ctrl->obj->wq, &mod);
  51 }
  52
  53 /**
  54  * Modifies the attributes for the specified WQ.
  55  *
  56  * @param rxq
  57  *   Verbs Rx queue.
  58  * @param type
  59  *   Type of change queue state.
  60  *
  61  * @return
  62  *   0 on success, a negative errno value otherwise and rte_errno is set.
  63  */
  64 static int
  65 mlx5_ibv_modify_wq(struct mlx5_rxq_priv *rxq, uint8_t type)
  66 {
  67         struct ibv_wq_attr mod = {
  68                 .attr_mask = IBV_WQ_ATTR_STATE,
  69                 .wq_state = (enum ibv_wq_state)type,
  70         };
  71
  72         return mlx5_glue->modify_wq(rxq->ctrl->obj->wq, &mod);
  73 }
  74
  75 /**
  76  * Modify QP using Verbs API.
  77  *
  78  * @param txq_obj
  79  *   Verbs Tx queue object.
  80  * @param type
  81  *   Type of change queue state.
  82  * @param dev_port
  83  *   IB device port number.
  84  *
  85  * @return
  86  *   0 on success, a negative errno value otherwise and rte_errno is set.
  87  */
  88 static int
  89 mlx5_ibv_modify_qp(struct mlx5_txq_obj *obj, enum mlx5_txq_modify_type type,
  90                    uint8_t dev_port)
  91 {
  92         struct ibv_qp_attr mod = {
  93                 .qp_state = IBV_QPS_RESET,
  94                 .port_num = dev_port,
  95         };
  96         int attr_mask = (IBV_QP_STATE | IBV_QP_PORT);
  97         int ret;
  98
  99         if (type != MLX5_TXQ_MOD_RST2RDY) {
 100                 ret = mlx5_glue->modify_qp(obj->qp, &mod, IBV_QP_STATE);
 101                 if (ret) {
 102                         DRV_LOG(ERR, "Cannot change Tx QP state to RESET %s",
 103                                 strerror(errno));
 104                         rte_errno = errno;
 105                         return ret;
 106                 }
 107                 if (type == MLX5_TXQ_MOD_RDY2RST)
 108                         return 0;
 109         }
 110         if (type == MLX5_TXQ_MOD_ERR2RDY)
 111                 attr_mask = IBV_QP_STATE;
 112         mod.qp_state = IBV_QPS_INIT;
 113         ret = mlx5_glue->modify_qp(obj->qp, &mod, attr_mask);
 114         if (ret) {
 115                 DRV_LOG(ERR, "Cannot change Tx QP state to INIT %s",
 116                         strerror(errno));
 117                 rte_errno = errno;
 118                 return ret;
 119         }
 120         mod.qp_state = IBV_QPS_RTR;
 121         ret = mlx5_glue->modify_qp(obj->qp, &mod, IBV_QP_STATE);
 122         if (ret) {
 123                 DRV_LOG(ERR, "Cannot change Tx QP state to RTR %s",
 124                         strerror(errno));
 125                 rte_errno = errno;
 126                 return ret;
 127         }
 128         mod.qp_state = IBV_QPS_RTS;
 129         ret = mlx5_glue->modify_qp(obj->qp, &mod, IBV_QP_STATE);
 130         if (ret) {
 131                 DRV_LOG(ERR, "Cannot change Tx QP state to RTS %s",
 132                         strerror(errno));
 133                 rte_errno = errno;
 134                 return ret;
 135         }
 136         return 0;
 137 }
 138
 139 /**
 140  * Create a CQ Verbs object.
 141  *
 142  * @param rxq
 143  *   Pointer to Rx queue.
 144  *
 145  * @return
 146  *   The Verbs CQ object initialized, NULL otherwise and rte_errno is set.
 147  */
 148 static struct ibv_cq *
 149 mlx5_rxq_ibv_cq_create(struct mlx5_rxq_priv *rxq)
 150 {
 151         struct mlx5_priv *priv = rxq->priv;
 152         struct mlx5_rxq_ctrl *rxq_ctrl = rxq->ctrl;
 153         struct mlx5_rxq_data *rxq_data = &rxq_ctrl->rxq;
 154         struct mlx5_rxq_obj *rxq_obj = rxq_ctrl->obj;
 155         unsigned int cqe_n = mlx5_rxq_cqe_num(rxq_data);
 156         struct {
 157                 struct ibv_cq_init_attr_ex ibv;
 158                 struct mlx5dv_cq_init_attr mlx5;
 159         } cq_attr;
 160
 161         cq_attr.ibv = (struct ibv_cq_init_attr_ex){
 162                 .cqe = cqe_n,
 163                 .channel = rxq_obj->ibv_channel,
 164                 .comp_mask = 0,
 165         };
 166         cq_attr.mlx5 = (struct mlx5dv_cq_init_attr){
 167                 .comp_mask = 0,
 168         };
 169         if (priv->config.cqe_comp && !rxq_data->hw_timestamp) {
 170                 cq_attr.mlx5.comp_mask |=
 171                                 MLX5DV_CQ_INIT_ATTR_MASK_COMPRESSED_CQE;
 172                 rxq_data->byte_mask = UINT32_MAX;
 173 #ifdef HAVE_IBV_DEVICE_STRIDING_RQ_SUPPORT
 174                 if (mlx5_rxq_mprq_enabled(rxq_data)) {
 175                         cq_attr.mlx5.cqe_comp_res_format =
 176                                         MLX5DV_CQE_RES_FORMAT_CSUM_STRIDX;
 177                         rxq_data->mcqe_format =
 178                                         MLX5_CQE_RESP_FORMAT_CSUM_STRIDX;
 179                 } else {
 180                         cq_attr.mlx5.cqe_comp_res_format =
 181                                         MLX5DV_CQE_RES_FORMAT_HASH;
 182                         rxq_data->mcqe_format =
 183                                         MLX5_CQE_RESP_FORMAT_HASH;
 184                 }
 185 #else
 186                 cq_attr.mlx5.cqe_comp_res_format = MLX5DV_CQE_RES_FORMAT_HASH;
 187                 rxq_data->mcqe_format = MLX5_CQE_RESP_FORMAT_HASH;
 188 #endif
 189                 /*
 190                  * For vectorized Rx, it must not be doubled in order to
 191                  * make cq_ci and rq_ci aligned.
 192                  */
 193                 if (mlx5_rxq_check_vec_support(rxq_data) < 0)
 194                         cq_attr.ibv.cqe *= 2;
 195         } else if (priv->config.cqe_comp && rxq_data->hw_timestamp) {
 196                 DRV_LOG(DEBUG,
 197                         "Port %u Rx CQE compression is disabled for HW"
 198                         " timestamp.",
 199                         priv->dev_data->port_id);
 200         }
 201 #ifdef HAVE_IBV_MLX5_MOD_CQE_128B_PAD
 202         if (RTE_CACHE_LINE_SIZE == 128) {
 203                 cq_attr.mlx5.comp_mask |= MLX5DV_CQ_INIT_ATTR_MASK_FLAGS;
 204                 cq_attr.mlx5.flags |= MLX5DV_CQ_INIT_ATTR_FLAGS_CQE_PAD;
 205         }
 206 #endif
 207         return mlx5_glue->cq_ex_to_cq(mlx5_glue->dv_create_cq
 208                                                            (priv->sh->cdev->ctx,
 209                                                             &cq_attr.ibv,
 210                                                             &cq_attr.mlx5));
 211 }
 212
 213 /**
 214  * Create a WQ Verbs object.
 215  *
 216  * @param rxq
 217  *   Pointer to Rx queue.
 218  *
 219  * @return
 220  *   The Verbs WQ object initialized, NULL otherwise and rte_errno is set.
 221  */
 222 static struct ibv_wq *
 223 mlx5_rxq_ibv_wq_create(struct mlx5_rxq_priv *rxq)
 224 {
 225         struct mlx5_priv *priv = rxq->priv;
 226         struct mlx5_rxq_ctrl *rxq_ctrl = rxq->ctrl;
 227         struct mlx5_rxq_data *rxq_data = &rxq_ctrl->rxq;
 228         struct mlx5_rxq_obj *rxq_obj = rxq_ctrl->obj;
 229         unsigned int wqe_n = 1 << rxq_data->elts_n;
 230         struct {
 231                 struct ibv_wq_init_attr ibv;
 232 #ifdef HAVE_IBV_DEVICE_STRIDING_RQ_SUPPORT
 233                 struct mlx5dv_wq_init_attr mlx5;
 234 #endif
 235         } wq_attr;
 236
 237         wq_attr.ibv = (struct ibv_wq_init_attr){
 238                 .wq_context = NULL, /* Could be useful in the future. */
 239                 .wq_type = IBV_WQT_RQ,
 240                 /* Max number of outstanding WRs. */
 241                 .max_wr = wqe_n >> rxq_data->sges_n,
 242                 /* Max number of scatter/gather elements in a WR. */
 243                 .max_sge = 1 << rxq_data->sges_n,
 244                 .pd = priv->sh->cdev->pd,
 245                 .cq = rxq_obj->ibv_cq,
 246                 .comp_mask = IBV_WQ_FLAGS_CVLAN_STRIPPING | 0,
 247                 .create_flags = (rxq_data->vlan_strip ?
 248                                  IBV_WQ_FLAGS_CVLAN_STRIPPING : 0),
 249         };
 250         /* By default, FCS (CRC) is stripped by hardware. */
 251         if (rxq_data->crc_present) {
 252                 wq_attr.ibv.create_flags |= IBV_WQ_FLAGS_SCATTER_FCS;
 253                 wq_attr.ibv.comp_mask |= IBV_WQ_INIT_ATTR_FLAGS;
 254         }
 255         if (priv->config.hw_padding) {
 256 #if defined(HAVE_IBV_WQ_FLAG_RX_END_PADDING)
 257                 wq_attr.ibv.create_flags |= IBV_WQ_FLAG_RX_END_PADDING;
 258                 wq_attr.ibv.comp_mask |= IBV_WQ_INIT_ATTR_FLAGS;
 259 #elif defined(HAVE_IBV_WQ_FLAGS_PCI_WRITE_END_PADDING)
 260                 wq_attr.ibv.create_flags |= IBV_WQ_FLAGS_PCI_WRITE_END_PADDING;
 261                 wq_attr.ibv.comp_mask |= IBV_WQ_INIT_ATTR_FLAGS;
 262 #endif
 263         }
 264 #ifdef HAVE_IBV_DEVICE_STRIDING_RQ_SUPPORT
 265         wq_attr.mlx5 = (struct mlx5dv_wq_init_attr){
 266                 .comp_mask = 0,
 267         };
 268         if (mlx5_rxq_mprq_enabled(rxq_data)) {
 269                 struct mlx5dv_striding_rq_init_attr *mprq_attr =
 270                                                 &wq_attr.mlx5.striding_rq_attrs;
 271
 272                 wq_attr.mlx5.comp_mask |= MLX5DV_WQ_INIT_ATTR_MASK_STRIDING_RQ;
 273                 *mprq_attr = (struct mlx5dv_striding_rq_init_attr){
 274                         .single_stride_log_num_of_bytes = rxq_data->strd_sz_n,
 275                         .single_wqe_log_num_of_strides = rxq_data->strd_num_n,
 276                         .two_byte_shift_en = MLX5_MPRQ_TWO_BYTE_SHIFT,
 277                 };
 278         }
 279         rxq_obj->wq = mlx5_glue->dv_create_wq(priv->sh->cdev->ctx, &wq_attr.ibv,
 280                                               &wq_attr.mlx5);
 281 #else
 282         rxq_obj->wq = mlx5_glue->create_wq(priv->sh->cdev->ctx, &wq_attr.ibv);
 283 #endif
 284         if (rxq_obj->wq) {
 285                 /*
 286                  * Make sure number of WRs*SGEs match expectations since a queue
 287                  * cannot allocate more than "desc" buffers.
 288                  */
 289                 if (wq_attr.ibv.max_wr != (wqe_n >> rxq_data->sges_n) ||
 290                     wq_attr.ibv.max_sge != (1u << rxq_data->sges_n)) {
 291                         DRV_LOG(ERR,
 292                                 "Port %u Rx queue %u requested %u*%u but got"
 293                                 " %u*%u WRs*SGEs.",
 294                                 priv->dev_data->port_id, rxq->idx,
 295                                 wqe_n >> rxq_data->sges_n,
 296                                 (1 << rxq_data->sges_n),
 297                                 wq_attr.ibv.max_wr, wq_attr.ibv.max_sge);
 298                         claim_zero(mlx5_glue->destroy_wq(rxq_obj->wq));
 299                         rxq_obj->wq = NULL;
 300                         rte_errno = EINVAL;
 301                 }
 302         }
 303         return rxq_obj->wq;
 304 }
 305
 306 /**
 307  * Create the Rx queue Verbs object.
 308  *
 309  * @param rxq
 310  *   Pointer to Rx queue.
 311  *
 312  * @return
 313  *   0 on success, a negative errno value otherwise and rte_errno is set.
 314  */
 315 static int
 316 mlx5_rxq_ibv_obj_new(struct mlx5_rxq_priv *rxq)
 317 {
 318         uint16_t idx = rxq->idx;
 319         struct mlx5_priv *priv = rxq->priv;
 320         uint16_t port_id = priv->dev_data->port_id;
 321         struct mlx5_rxq_ctrl *rxq_ctrl = rxq->ctrl;
 322         struct mlx5_rxq_data *rxq_data = &rxq_ctrl->rxq;
 323         struct mlx5_rxq_obj *tmpl = rxq_ctrl->obj;
 324         struct mlx5dv_cq cq_info;
 325         struct mlx5dv_rwq rwq;
 326         int ret = 0;
 327         struct mlx5dv_obj obj;
 328
 329         MLX5_ASSERT(rxq_data);
 330         MLX5_ASSERT(tmpl);
 331         tmpl->rxq_ctrl = rxq_ctrl;
 332         if (rxq_ctrl->irq) {
 333                 tmpl->ibv_channel =
 334                         mlx5_glue->create_comp_channel(priv->sh->cdev->ctx);
 335                 if (!tmpl->ibv_channel) {
 336                         DRV_LOG(ERR, "Port %u: comp channel creation failure.",
 337                                 port_id);
 338                         rte_errno = ENOMEM;
 339                         goto error;
 340                 }
 341                 tmpl->fd = ((struct ibv_comp_channel *)(tmpl->ibv_channel))->fd;
 342         }
 343         /* Create CQ using Verbs API. */
 344         tmpl->ibv_cq = mlx5_rxq_ibv_cq_create(rxq);
 345         if (!tmpl->ibv_cq) {
 346                 DRV_LOG(ERR, "Port %u Rx queue %u CQ creation failure.",
 347                         port_id, idx);
 348                 rte_errno = ENOMEM;
 349                 goto error;
 350         }
 351         obj.cq.in = tmpl->ibv_cq;
 352         obj.cq.out = &cq_info;
 353         ret = mlx5_glue->dv_init_obj(&obj, MLX5DV_OBJ_CQ);
 354         if (ret) {
 355                 rte_errno = ret;
 356                 goto error;
 357         }
 358         if (cq_info.cqe_size != RTE_CACHE_LINE_SIZE) {
 359                 DRV_LOG(ERR,
 360                         "Port %u wrong MLX5_CQE_SIZE environment "
 361                         "variable value: it should be set to %u.",
 362                         port_id, RTE_CACHE_LINE_SIZE);
 363                 rte_errno = EINVAL;
 364                 goto error;
 365         }
 366         /* Fill the rings. */
 367         rxq_data->cqe_n = log2above(cq_info.cqe_cnt);
 368         rxq_data->cq_db = cq_info.dbrec;
 369         rxq_data->cqes = (volatile struct mlx5_cqe (*)[])(uintptr_t)cq_info.buf;
 370         rxq_data->cq_uar = cq_info.cq_uar;
 371         rxq_data->cqn = cq_info.cqn;
 372         /* Create WQ (RQ) using Verbs API. */
 373         tmpl->wq = mlx5_rxq_ibv_wq_create(rxq);
 374         if (!tmpl->wq) {
 375                 DRV_LOG(ERR, "Port %u Rx queue %u WQ creation failure.",
 376                         port_id, idx);
 377                 rte_errno = ENOMEM;
 378                 goto error;
 379         }
 380         /* Change queue state to ready. */
 381         ret = mlx5_ibv_modify_wq(rxq, IBV_WQS_RDY);
 382         if (ret) {
 383                 DRV_LOG(ERR,
 384                         "Port %u Rx queue %u WQ state to IBV_WQS_RDY failed.",
 385                         port_id, idx);
 386                 rte_errno = ret;
 387                 goto error;
 388         }
 389         obj.rwq.in = tmpl->wq;
 390         obj.rwq.out = &rwq;
 391         ret = mlx5_glue->dv_init_obj(&obj, MLX5DV_OBJ_RWQ);
 392         if (ret) {
 393                 rte_errno = ret;
 394                 goto error;
 395         }
 396         rxq_data->wqes = rwq.buf;
 397         rxq_data->rq_db = rwq.dbrec;
 398         rxq_data->cq_arm_sn = 0;
 399         mlx5_rxq_initialize(rxq_data);
 400         rxq_data->cq_ci = 0;
 401         priv->dev_data->rx_queue_state[idx] = RTE_ETH_QUEUE_STATE_STARTED;
 402         rxq_ctrl->wqn = ((struct ibv_wq *)(tmpl->wq))->wq_num;
 403         return 0;
 404 error:
 405         ret = rte_errno; /* Save rte_errno before cleanup. */
 406         if (tmpl->wq)
 407                 claim_zero(mlx5_glue->destroy_wq(tmpl->wq));
 408         if (tmpl->ibv_cq)
 409                 claim_zero(mlx5_glue->destroy_cq(tmpl->ibv_cq));
 410         if (tmpl->ibv_channel)
 411                 claim_zero(mlx5_glue->destroy_comp_channel(tmpl->ibv_channel));
 412         rte_errno = ret; /* Restore rte_errno. */
 413         return -rte_errno;
 414 }
 415
 416 /**
 417  * Release an Rx verbs queue object.
 418  *
 419  * @param rxq
 420  *   Pointer to Rx queue.
 421  */
 422 static void
 423 mlx5_rxq_ibv_obj_release(struct mlx5_rxq_priv *rxq)
 424 {
 425         struct mlx5_rxq_obj *rxq_obj = rxq->ctrl->obj;
 426
 427         if (rxq_obj == NULL || rxq_obj->wq == NULL)
 428                 return;
 429         claim_zero(mlx5_glue->destroy_wq(rxq_obj->wq));
 430         rxq_obj->wq = NULL;
 431         MLX5_ASSERT(rxq_obj->ibv_cq);
 432         claim_zero(mlx5_glue->destroy_cq(rxq_obj->ibv_cq));
 433         if (rxq_obj->ibv_channel)
 434                 claim_zero(mlx5_glue->destroy_comp_channel
 435                                                         (rxq_obj->ibv_channel));
 436         rxq->ctrl->started = false;
 437 }
 438
 439 /**
 440  * Get event for an Rx verbs queue object.
 441  *
 442  * @param rxq_obj
 443  *   Verbs Rx queue object.
 444  *
 445  * @return
 446  *   0 on success, a negative errno value otherwise and rte_errno is set.
 447  */
 448 static int
 449 mlx5_rx_ibv_get_event(struct mlx5_rxq_obj *rxq_obj)
 450 {
 451         struct ibv_cq *ev_cq;
 452         void *ev_ctx;
 453         int ret = mlx5_glue->get_cq_event(rxq_obj->ibv_channel,
 454                                           &ev_cq, &ev_ctx);
 455
 456         if (ret < 0 || ev_cq != rxq_obj->ibv_cq)
 457                 goto exit;
 458         mlx5_glue->ack_cq_events(rxq_obj->ibv_cq, 1);
 459         return 0;
 460 exit:
 461         if (ret < 0)
 462                 rte_errno = errno;
 463         else
 464                 rte_errno = EINVAL;
 465         return -rte_errno;
 466 }
 467
 468 /**
 469  * Creates a receive work queue as a filed of indirection table.
 470  *
 471  * @param dev
 472  *   Pointer to Ethernet device.
 473  * @param log_n
 474  *   Log of number of queues in the array.
 475  * @param ind_tbl
 476  *   Verbs indirection table object.
 477  *
 478  * @return
 479  *   0 on success, a negative errno value otherwise and rte_errno is set.
 480  */
 481 static int
 482 mlx5_ibv_ind_table_new(struct rte_eth_dev *dev, const unsigned int log_n,
 483                        struct mlx5_ind_table_obj *ind_tbl)
 484 {
 485         struct mlx5_priv *priv = dev->data->dev_private;
 486         struct ibv_wq *wq[1 << log_n];
 487         unsigned int i, j;
 488
 489         MLX5_ASSERT(ind_tbl);
 490         for (i = 0; i != ind_tbl->queues_n; ++i) {
 491                 struct mlx5_rxq_priv *rxq = mlx5_rxq_get(dev,
 492                                                          ind_tbl->queues[i]);
 493
 494                 wq[i] = rxq->ctrl->obj->wq;
 495         }
 496         MLX5_ASSERT(i > 0);
 497         /* Finalise indirection table. */
 498         for (j = 0; i != (unsigned int)(1 << log_n); ++j, ++i)
 499                 wq[i] = wq[j];
 500         ind_tbl->ind_table = mlx5_glue->create_rwq_ind_table
 501                                         (priv->sh->cdev->ctx,
 502                                          &(struct ibv_rwq_ind_table_init_attr){
 503                                                  .log_ind_tbl_size = log_n,
 504                                                  .ind_tbl = wq,
 505                                                  .comp_mask = 0,
 506                                          });
 507         if (!ind_tbl->ind_table) {
 508                 rte_errno = errno;
 509                 return -rte_errno;
 510         }
 511         return 0;
 512 }
 513
 514 /**
 515  * Destroys the specified Indirection Table.
 516  *
 517  * @param ind_table
 518  *   Indirection table to release.
 519  */
 520 static void
 521 mlx5_ibv_ind_table_destroy(struct mlx5_ind_table_obj *ind_tbl)
 522 {
 523         claim_zero(mlx5_glue->destroy_rwq_ind_table(ind_tbl->ind_table));
 524 }
 525
 526 /**
 527  * Create an Rx Hash queue.
 528  *
 529  * @param dev
 530  *   Pointer to Ethernet device.
 531  * @param hrxq
 532  *   Pointer to Rx Hash queue.
 533  * @param tunnel
 534  *   Tunnel type.
 535  *
 536  * @return
 537  *   0 on success, a negative errno value otherwise and rte_errno is set.
 538  */
 539 static int
 540 mlx5_ibv_hrxq_new(struct rte_eth_dev *dev, struct mlx5_hrxq *hrxq,
 541                   int tunnel __rte_unused)
 542 {
 543         struct mlx5_priv *priv = dev->data->dev_private;
 544         struct ibv_qp *qp = NULL;
 545         struct mlx5_ind_table_obj *ind_tbl = hrxq->ind_table;
 546         const uint8_t *rss_key = hrxq->rss_key;
 547         uint64_t hash_fields = hrxq->hash_fields;
 548         int err;
 549 #ifdef HAVE_IBV_DEVICE_TUNNEL_SUPPORT
 550         struct mlx5dv_qp_init_attr qp_init_attr;
 551
 552         memset(&qp_init_attr, 0, sizeof(qp_init_attr));
 553         if (tunnel) {
 554                 qp_init_attr.comp_mask =
 555                                        MLX5DV_QP_INIT_ATTR_MASK_QP_CREATE_FLAGS;
 556                 qp_init_attr.create_flags = MLX5DV_QP_CREATE_TUNNEL_OFFLOADS;
 557         }
 558 #ifdef HAVE_IBV_FLOW_DV_SUPPORT
 559         if (dev->data->dev_conf.lpbk_mode) {
 560                 /* Allow packet sent from NIC loop back w/o source MAC check. */
 561                 qp_init_attr.comp_mask |=
 562                                 MLX5DV_QP_INIT_ATTR_MASK_QP_CREATE_FLAGS;
 563                 qp_init_attr.create_flags |=
 564                                 MLX5DV_QP_CREATE_TIR_ALLOW_SELF_LOOPBACK_UC;
 565         }
 566 #endif
 567         qp = mlx5_glue->dv_create_qp
 568                         (priv->sh->cdev->ctx,
 569                          &(struct ibv_qp_init_attr_ex){
 570                                 .qp_type = IBV_QPT_RAW_PACKET,
 571                                 .comp_mask =
 572                                         IBV_QP_INIT_ATTR_PD |
 573                                         IBV_QP_INIT_ATTR_IND_TABLE |
 574                                         IBV_QP_INIT_ATTR_RX_HASH,
 575                                 .rx_hash_conf = (struct ibv_rx_hash_conf){
 576                                         .rx_hash_function =
 577                                                 IBV_RX_HASH_FUNC_TOEPLITZ,
 578                                         .rx_hash_key_len = hrxq->rss_key_len,
 579                                         .rx_hash_key =
 580                                                 (void *)(uintptr_t)rss_key,
 581                                         .rx_hash_fields_mask = hash_fields,
 582                                 },
 583                                 .rwq_ind_tbl = ind_tbl->ind_table,
 584                                 .pd = priv->sh->cdev->pd,
 585                           },
 586                           &qp_init_attr);
 587 #else
 588         qp = mlx5_glue->create_qp_ex
 589                         (priv->sh->cdev->ctx,
 590                          &(struct ibv_qp_init_attr_ex){
 591                                 .qp_type = IBV_QPT_RAW_PACKET,
 592                                 .comp_mask =
 593                                         IBV_QP_INIT_ATTR_PD |
 594                                         IBV_QP_INIT_ATTR_IND_TABLE |
 595                                         IBV_QP_INIT_ATTR_RX_HASH,
 596                                 .rx_hash_conf = (struct ibv_rx_hash_conf){
 597                                         .rx_hash_function =
 598                                                 IBV_RX_HASH_FUNC_TOEPLITZ,
 599                                         .rx_hash_key_len = hrxq->rss_key_len,
 600                                         .rx_hash_key =
 601                                                 (void *)(uintptr_t)rss_key,
 602                                         .rx_hash_fields_mask = hash_fields,
 603                                 },
 604                                 .rwq_ind_tbl = ind_tbl->ind_table,
 605                                 .pd = priv->sh->cdev->pd,
 606                          });
 607 #endif
 608         if (!qp) {
 609                 rte_errno = errno;
 610                 goto error;
 611         }
 612         hrxq->qp = qp;
 613 #ifdef HAVE_IBV_FLOW_DV_SUPPORT
 614         hrxq->action = mlx5_glue->dv_create_flow_action_dest_ibv_qp(hrxq->qp);
 615         if (!hrxq->action) {
 616                 rte_errno = errno;
 617                 goto error;
 618         }
 619 #endif
 620         return 0;
 621 error:
 622         err = rte_errno; /* Save rte_errno before cleanup. */
 623         if (qp)
 624                 claim_zero(mlx5_glue->destroy_qp(qp));
 625         rte_errno = err; /* Restore rte_errno. */
 626         return -rte_errno;
 627 }
 628
 629 /**
 630  * Destroy a Verbs queue pair.
 631  *
 632  * @param hrxq
 633  *   Hash Rx queue to release its qp.
 634  */
 635 static void
 636 mlx5_ibv_qp_destroy(struct mlx5_hrxq *hrxq)
 637 {
 638         claim_zero(mlx5_glue->destroy_qp(hrxq->qp));
 639 }
 640
 641 /**
 642  * Release a drop Rx queue Verbs object.
 643  *
 644  * @param dev
 645  *   Pointer to Ethernet device.
 646  */
 647 static void
 648 mlx5_rxq_ibv_obj_drop_release(struct rte_eth_dev *dev)
 649 {
 650         struct mlx5_priv *priv = dev->data->dev_private;
 651         struct mlx5_rxq_priv *rxq = priv->drop_queue.rxq;
 652         struct mlx5_rxq_obj *rxq_obj;
 653
 654         if (rxq == NULL)
 655                 return;
 656         if (rxq->ctrl == NULL)
 657                 goto free_priv;
 658         rxq_obj = rxq->ctrl->obj;
 659         if (rxq_obj == NULL)
 660                 goto free_ctrl;
 661         if (rxq_obj->wq)
 662                 claim_zero(mlx5_glue->destroy_wq(rxq_obj->wq));
 663         if (rxq_obj->ibv_cq)
 664                 claim_zero(mlx5_glue->destroy_cq(rxq_obj->ibv_cq));
 665         mlx5_free(rxq_obj);
 666 free_ctrl:
 667         mlx5_free(rxq->ctrl);
 668 free_priv:
 669         mlx5_free(rxq);
 670         priv->drop_queue.rxq = NULL;
 671 }
 672
 673 /**
 674  * Create a drop Rx queue Verbs object.
 675  *
 676  * @param dev
 677  *   Pointer to Ethernet device.
 678  *
 679  * @return
 680  *   0 on success, a negative errno value otherwise and rte_errno is set.
 681  */
 682 static int
 683 mlx5_rxq_ibv_obj_drop_create(struct rte_eth_dev *dev)
 684 {
 685         struct mlx5_priv *priv = dev->data->dev_private;
 686         struct ibv_context *ctx = priv->sh->cdev->ctx;
 687         struct mlx5_rxq_priv *rxq = priv->drop_queue.rxq;
 688         struct mlx5_rxq_ctrl *rxq_ctrl = NULL;
 689         struct mlx5_rxq_obj *rxq_obj = NULL;
 690
 691         if (rxq != NULL)
 692                 return 0;
 693         rxq = mlx5_malloc(MLX5_MEM_ZERO, sizeof(*rxq), 0, SOCKET_ID_ANY);
 694         if (rxq == NULL) {
 695                 DRV_LOG(DEBUG, "Port %u cannot allocate drop Rx queue memory.",
 696                       dev->data->port_id);
 697                 rte_errno = ENOMEM;
 698                 return -rte_errno;
 699         }
 700         priv->drop_queue.rxq = rxq;
 701         rxq_ctrl = mlx5_malloc(MLX5_MEM_ZERO, sizeof(*rxq_ctrl), 0,
 702                                SOCKET_ID_ANY);
 703         if (rxq_ctrl == NULL) {
 704                 DRV_LOG(DEBUG, "Port %u cannot allocate drop Rx queue control memory.",
 705                       dev->data->port_id);
 706                 rte_errno = ENOMEM;
 707                 goto error;
 708         }
 709         rxq->ctrl = rxq_ctrl;
 710         rxq_obj = mlx5_malloc(MLX5_MEM_ZERO, sizeof(*rxq_obj), 0,
 711                               SOCKET_ID_ANY);
 712         if (rxq_obj == NULL) {
 713                 DRV_LOG(DEBUG, "Port %u cannot allocate drop Rx queue memory.",
 714                       dev->data->port_id);
 715                 rte_errno = ENOMEM;
 716                 goto error;
 717         }
 718         rxq_ctrl->obj = rxq_obj;
 719         rxq_obj->ibv_cq = mlx5_glue->create_cq(ctx, 1, NULL, NULL, 0);
 720         if (!rxq_obj->ibv_cq) {
 721                 DRV_LOG(DEBUG, "Port %u cannot allocate CQ for drop queue.",
 722                       dev->data->port_id);
 723                 rte_errno = errno;
 724                 goto error;
 725         }
 726         rxq_obj->wq = mlx5_glue->create_wq(ctx, &(struct ibv_wq_init_attr){
 727                                                     .wq_type = IBV_WQT_RQ,
 728                                                     .max_wr = 1,
 729                                                     .max_sge = 1,
 730                                                     .pd = priv->sh->cdev->pd,
 731                                                     .cq = rxq_obj->ibv_cq,
 732                                               });
 733         if (!rxq_obj->wq) {
 734                 DRV_LOG(DEBUG, "Port %u cannot allocate WQ for drop queue.",
 735                       dev->data->port_id);
 736                 rte_errno = errno;
 737                 goto error;
 738         }
 739         return 0;
 740 error:
 741         mlx5_rxq_ibv_obj_drop_release(dev);
 742         return -rte_errno;
 743 }
 744
 745 /**
 746  * Create a Verbs drop action for Rx Hash queue.
 747  *
 748  * @param dev
 749  *   Pointer to Ethernet device.
 750  *
 751  * @return
 752  *   0 on success, a negative errno value otherwise and rte_errno is set.
 753  */
 754 static int
 755 mlx5_ibv_drop_action_create(struct rte_eth_dev *dev)
 756 {
 757         struct mlx5_priv *priv = dev->data->dev_private;
 758         struct mlx5_hrxq *hrxq = priv->drop_queue.hrxq;
 759         struct ibv_rwq_ind_table *ind_tbl = NULL;
 760         struct mlx5_rxq_obj *rxq;
 761         int ret;
 762
 763         MLX5_ASSERT(hrxq && hrxq->ind_table);
 764         ret = mlx5_rxq_ibv_obj_drop_create(dev);
 765         if (ret < 0)
 766                 goto error;
 767         rxq = priv->drop_queue.rxq->ctrl->obj;
 768         ind_tbl = mlx5_glue->create_rwq_ind_table
 769                                 (priv->sh->cdev->ctx,
 770                                  &(struct ibv_rwq_ind_table_init_attr){
 771                                         .log_ind_tbl_size = 0,
 772                                         .ind_tbl = (struct ibv_wq **)&rxq->wq,
 773                                         .comp_mask = 0,
 774                                  });
 775         if (!ind_tbl) {
 776                 DRV_LOG(DEBUG, "Port %u"
 777                         " cannot allocate indirection table for drop queue.",
 778                         dev->data->port_id);
 779                 rte_errno = errno;
 780                 goto error;
 781         }
 782         hrxq->qp = mlx5_glue->create_qp_ex(priv->sh->cdev->ctx,
 783                  &(struct ibv_qp_init_attr_ex){
 784                         .qp_type = IBV_QPT_RAW_PACKET,
 785                         .comp_mask = IBV_QP_INIT_ATTR_PD |
 786                                      IBV_QP_INIT_ATTR_IND_TABLE |
 787                                      IBV_QP_INIT_ATTR_RX_HASH,
 788                         .rx_hash_conf = (struct ibv_rx_hash_conf){
 789                                 .rx_hash_function = IBV_RX_HASH_FUNC_TOEPLITZ,
 790                                 .rx_hash_key_len = MLX5_RSS_HASH_KEY_LEN,
 791                                 .rx_hash_key = rss_hash_default_key,
 792                                 .rx_hash_fields_mask = 0,
 793                                 },
 794                         .rwq_ind_tbl = ind_tbl,
 795                         .pd = priv->sh->cdev->pd
 796                  });
 797         if (!hrxq->qp) {
 798                 DRV_LOG(DEBUG, "Port %u cannot allocate QP for drop queue.",
 799                       dev->data->port_id);
 800                 rte_errno = errno;
 801                 goto error;
 802         }
 803 #ifdef HAVE_IBV_FLOW_DV_SUPPORT
 804         hrxq->action = mlx5_glue->dv_create_flow_action_dest_ibv_qp(hrxq->qp);
 805         if (!hrxq->action) {
 806                 rte_errno = errno;
 807                 goto error;
 808         }
 809 #endif
 810         hrxq->ind_table->ind_table = ind_tbl;
 811         return 0;
 812 error:
 813         if (hrxq->qp)
 814                 claim_zero(mlx5_glue->destroy_qp(hrxq->qp));
 815         if (ind_tbl)
 816                 claim_zero(mlx5_glue->destroy_rwq_ind_table(ind_tbl));
 817         if (priv->drop_queue.rxq)
 818                 mlx5_rxq_ibv_obj_drop_release(dev);
 819         return -rte_errno;
 820 }
 821
 822 /**
 823  * Release a drop hash Rx queue.
 824  *
 825  * @param dev
 826  *   Pointer to Ethernet device.
 827  */
 828 static void
 829 mlx5_ibv_drop_action_destroy(struct rte_eth_dev *dev)
 830 {
 831         struct mlx5_priv *priv = dev->data->dev_private;
 832         struct mlx5_hrxq *hrxq = priv->drop_queue.hrxq;
 833         struct ibv_rwq_ind_table *ind_tbl = hrxq->ind_table->ind_table;
 834
 835 #ifdef HAVE_IBV_FLOW_DV_SUPPORT
 836         claim_zero(mlx5_glue->destroy_flow_action(hrxq->action));
 837 #endif
 838         claim_zero(mlx5_glue->destroy_qp(hrxq->qp));
 839         claim_zero(mlx5_glue->destroy_rwq_ind_table(ind_tbl));
 840         mlx5_rxq_ibv_obj_drop_release(dev);
 841 }
 842
 843 /**
 844  * Create a QP Verbs object.
 845  *
 846  * @param dev
 847  *   Pointer to Ethernet device.
 848  * @param idx
 849  *   Queue index in DPDK Tx queue array.
 850  *
 851  * @return
 852  *   The QP Verbs object, NULL otherwise and rte_errno is set.
 853  */
 854 static struct ibv_qp *
 855 mlx5_txq_ibv_qp_create(struct rte_eth_dev *dev, uint16_t idx)
 856 {
 857         struct mlx5_priv *priv = dev->data->dev_private;
 858         struct mlx5_txq_data *txq_data = (*priv->txqs)[idx];
 859         struct mlx5_txq_ctrl *txq_ctrl =
 860                         container_of(txq_data, struct mlx5_txq_ctrl, txq);
 861         struct ibv_qp *qp_obj = NULL;
 862         struct ibv_qp_init_attr_ex qp_attr = { 0 };
 863         const int desc = 1 << txq_data->elts_n;
 864
 865         MLX5_ASSERT(txq_ctrl->obj->cq);
 866         /* CQ to be associated with the send queue. */
 867         qp_attr.send_cq = txq_ctrl->obj->cq;
 868         /* CQ to be associated with the receive queue. */
 869         qp_attr.recv_cq = txq_ctrl->obj->cq;
 870         /* Max number of outstanding WRs. */
 871         qp_attr.cap.max_send_wr = ((priv->sh->device_attr.max_qp_wr < desc) ?
 872                                    priv->sh->device_attr.max_qp_wr : desc);
 873         /*
 874          * Max number of scatter/gather elements in a WR, must be 1 to prevent
 875          * libmlx5 from trying to affect must be 1 to prevent libmlx5 from
 876          * trying to affect too much memory. TX gather is not impacted by the
 877          * device_attr.max_sge limit and will still work properly.
 878          */
 879         qp_attr.cap.max_send_sge = 1;
 880         qp_attr.qp_type = IBV_QPT_RAW_PACKET,
 881         /* Do *NOT* enable this, completions events are managed per Tx burst. */
 882         qp_attr.sq_sig_all = 0;
 883         qp_attr.pd = priv->sh->cdev->pd;
 884         qp_attr.comp_mask = IBV_QP_INIT_ATTR_PD;
 885         if (txq_data->inlen_send)
 886                 qp_attr.cap.max_inline_data = txq_ctrl->max_inline_data;
 887         if (txq_data->tso_en) {
 888                 qp_attr.max_tso_header = txq_ctrl->max_tso_header;
 889                 qp_attr.comp_mask |= IBV_QP_INIT_ATTR_MAX_TSO_HEADER;
 890         }
 891         qp_obj = mlx5_glue->create_qp_ex(priv->sh->cdev->ctx, &qp_attr);
 892         if (qp_obj == NULL) {
 893                 DRV_LOG(ERR, "Port %u Tx queue %u QP creation failure.",
 894                         dev->data->port_id, idx);
 895                 rte_errno = errno;
 896         }
 897         return qp_obj;
 898 }
 899
 900 /**
 901  * Create the Tx queue Verbs object.
 902  *
 903  * @param dev
 904  *   Pointer to Ethernet device.
 905  * @param idx
 906  *   Queue index in DPDK Tx queue array.
 907  *
 908  * @return
 909  *   0 on success, a negative errno value otherwise and rte_errno is set.
 910  */
 911 int
 912 mlx5_txq_ibv_obj_new(struct rte_eth_dev *dev, uint16_t idx)
 913 {
 914         struct mlx5_priv *priv = dev->data->dev_private;
 915         struct mlx5_txq_data *txq_data = (*priv->txqs)[idx];
 916         struct mlx5_txq_ctrl *txq_ctrl =
 917                 container_of(txq_data, struct mlx5_txq_ctrl, txq);
 918         struct mlx5_txq_obj *txq_obj = txq_ctrl->obj;
 919         unsigned int cqe_n;
 920         struct mlx5dv_qp qp;
 921         struct mlx5dv_cq cq_info;
 922         struct mlx5dv_obj obj;
 923         const int desc = 1 << txq_data->elts_n;
 924         int ret = 0;
 925
 926         MLX5_ASSERT(txq_data);
 927         MLX5_ASSERT(txq_obj);
 928         txq_obj->txq_ctrl = txq_ctrl;
 929         if (mlx5_getenv_int("MLX5_ENABLE_CQE_COMPRESSION")) {
 930                 DRV_LOG(ERR, "Port %u MLX5_ENABLE_CQE_COMPRESSION "
 931                         "must never be set.", dev->data->port_id);
 932                 rte_errno = EINVAL;
 933                 return -rte_errno;
 934         }
 935         cqe_n = desc / MLX5_TX_COMP_THRESH +
 936                 1 + MLX5_TX_COMP_THRESH_INLINE_DIV;
 937         txq_obj->cq = mlx5_glue->create_cq(priv->sh->cdev->ctx, cqe_n,
 938                                            NULL, NULL, 0);
 939         if (txq_obj->cq == NULL) {
 940                 DRV_LOG(ERR, "Port %u Tx queue %u CQ creation failure.",
 941                         dev->data->port_id, idx);
 942                 rte_errno = errno;
 943                 goto error;
 944         }
 945         txq_obj->qp = mlx5_txq_ibv_qp_create(dev, idx);
 946         if (txq_obj->qp == NULL) {
 947                 rte_errno = errno;
 948                 goto error;
 949         }
 950         ret = mlx5_ibv_modify_qp(txq_obj, MLX5_TXQ_MOD_RST2RDY,
 951                                  (uint8_t)priv->dev_port);
 952         if (ret) {
 953                 DRV_LOG(ERR, "Port %u Tx queue %u QP state modifying failed.",
 954                         dev->data->port_id, idx);
 955                 rte_errno = errno;
 956                 goto error;
 957         }
 958         qp.comp_mask = MLX5DV_QP_MASK_UAR_MMAP_OFFSET;
 959 #ifdef HAVE_IBV_FLOW_DV_SUPPORT
 960         /* If using DevX, need additional mask to read tisn value. */
 961         if (priv->sh->devx && !priv->sh->tdn)
 962                 qp.comp_mask |= MLX5DV_QP_MASK_RAW_QP_HANDLES;
 963 #endif
 964         obj.cq.in = txq_obj->cq;
 965         obj.cq.out = &cq_info;
 966         obj.qp.in = txq_obj->qp;
 967         obj.qp.out = &qp;
 968         ret = mlx5_glue->dv_init_obj(&obj, MLX5DV_OBJ_CQ | MLX5DV_OBJ_QP);
 969         if (ret != 0) {
 970                 rte_errno = errno;
 971                 goto error;
 972         }
 973         if (cq_info.cqe_size != RTE_CACHE_LINE_SIZE) {
 974                 DRV_LOG(ERR,
 975                         "Port %u wrong MLX5_CQE_SIZE environment variable"
 976                         " value: it should be set to %u.",
 977                         dev->data->port_id, RTE_CACHE_LINE_SIZE);
 978                 rte_errno = EINVAL;
 979                 goto error;
 980         }
 981         txq_data->cqe_n = log2above(cq_info.cqe_cnt);
 982         txq_data->cqe_s = 1 << txq_data->cqe_n;
 983         txq_data->cqe_m = txq_data->cqe_s - 1;
 984         txq_data->qp_num_8s = ((struct ibv_qp *)txq_obj->qp)->qp_num << 8;
 985         txq_data->wqes = qp.sq.buf;
 986         txq_data->wqe_n = log2above(qp.sq.wqe_cnt);
 987         txq_data->wqe_s = 1 << txq_data->wqe_n;
 988         txq_data->wqe_m = txq_data->wqe_s - 1;
 989         txq_data->wqes_end = txq_data->wqes + txq_data->wqe_s;
 990         txq_data->qp_db = &qp.dbrec[MLX5_SND_DBR];
 991         txq_data->cq_db = cq_info.dbrec;
 992         txq_data->cqes = (volatile struct mlx5_cqe *)cq_info.buf;
 993         txq_data->cq_ci = 0;
 994         txq_data->cq_pi = 0;
 995         txq_data->wqe_ci = 0;
 996         txq_data->wqe_pi = 0;
 997         txq_data->wqe_comp = 0;
 998         txq_data->wqe_thres = txq_data->wqe_s / MLX5_TX_COMP_THRESH_INLINE_DIV;
 999 #ifdef HAVE_IBV_FLOW_DV_SUPPORT
1000         /*
1001          * If using DevX need to query and store TIS transport domain value.
1002          * This is done once per port.
1003          * Will use this value on Rx, when creating matching TIR.
1004          */
1005         if (priv->sh->devx && !priv->sh->tdn) {
1006                 ret = mlx5_devx_cmd_qp_query_tis_td(txq_obj->qp, qp.tisn,
1007                                                     &priv->sh->tdn);
1008                 if (ret) {
1009                         DRV_LOG(ERR, "Fail to query port %u Tx queue %u QP TIS "
1010                                 "transport domain.", dev->data->port_id, idx);
1011                         rte_errno = EINVAL;
1012                         goto error;
1013                 } else {
1014                         DRV_LOG(DEBUG, "Port %u Tx queue %u TIS number %d "
1015                                 "transport domain %d.", dev->data->port_id,
1016                                 idx, qp.tisn, priv->sh->tdn);
1017                 }
1018         }
1019 #endif
1020         if (qp.comp_mask & MLX5DV_QP_MASK_UAR_MMAP_OFFSET) {
1021                 txq_ctrl->uar_mmap_offset = qp.uar_mmap_offset;
1022                 DRV_LOG(DEBUG, "Port %u: uar_mmap_offset 0x%" PRIx64 ".",
1023                         dev->data->port_id, txq_ctrl->uar_mmap_offset);
1024         } else {
1025                 DRV_LOG(ERR,
1026                         "Port %u failed to retrieve UAR info, invalid libmlx5.so",
1027                         dev->data->port_id);
1028                 rte_errno = EINVAL;
1029                 goto error;
1030         }
1031         txq_uar_init(txq_ctrl, qp.bf.reg);
1032         dev->data->tx_queue_state[idx] = RTE_ETH_QUEUE_STATE_STARTED;
1033         return 0;
1034 error:
1035         ret = rte_errno; /* Save rte_errno before cleanup. */
1036         if (txq_obj->cq)
1037                 claim_zero(mlx5_glue->destroy_cq(txq_obj->cq));
1038         if (txq_obj->qp)
1039                 claim_zero(mlx5_glue->destroy_qp(txq_obj->qp));
1040         rte_errno = ret; /* Restore rte_errno. */
1041         return -rte_errno;
1042 }
1043
1044 /*
1045  * Create the dummy QP with minimal resources for loopback.
1046  *
1047  * @param dev
1048  *   Pointer to Ethernet device.
1049  *
1050  * @return
1051  *   0 on success, a negative errno value otherwise and rte_errno is set.
1052  */
1053 int
1054 mlx5_rxq_ibv_obj_dummy_lb_create(struct rte_eth_dev *dev)
1055 {
1056 #if defined(HAVE_IBV_DEVICE_TUNNEL_SUPPORT) && defined(HAVE_IBV_FLOW_DV_SUPPORT)
1057         struct mlx5_priv *priv = dev->data->dev_private;
1058         struct mlx5_dev_ctx_shared *sh = priv->sh;
1059         struct ibv_context *ctx = sh->cdev->ctx;
1060         struct mlx5dv_qp_init_attr qp_init_attr = {0};
1061         struct {
1062                 struct ibv_cq_init_attr_ex ibv;
1063                 struct mlx5dv_cq_init_attr mlx5;
1064         } cq_attr = {{0}};
1065
1066         if (dev->data->dev_conf.lpbk_mode) {
1067                 /* Allow packet sent from NIC loop back w/o source MAC check. */
1068                 qp_init_attr.comp_mask |=
1069                                 MLX5DV_QP_INIT_ATTR_MASK_QP_CREATE_FLAGS;
1070                 qp_init_attr.create_flags |=
1071                                 MLX5DV_QP_CREATE_TIR_ALLOW_SELF_LOOPBACK_UC;
1072         } else {
1073                 return 0;
1074         }
1075         /* Only need to check refcnt, 0 after "sh" is allocated. */
1076         if (!!(__atomic_fetch_add(&sh->self_lb.refcnt, 1, __ATOMIC_RELAXED))) {
1077                 MLX5_ASSERT(sh->self_lb.ibv_cq && sh->self_lb.qp);
1078                 priv->lb_used = 1;
1079                 return 0;
1080         }
1081         cq_attr.ibv = (struct ibv_cq_init_attr_ex){
1082                 .cqe = 1,
1083                 .channel = NULL,
1084                 .comp_mask = 0,
1085         };
1086         cq_attr.mlx5 = (struct mlx5dv_cq_init_attr){
1087                 .comp_mask = 0,
1088         };
1089         /* Only CQ is needed, no WQ(RQ) is required in this case. */
1090         sh->self_lb.ibv_cq = mlx5_glue->cq_ex_to_cq(mlx5_glue->dv_create_cq(ctx,
1091                                                         &cq_attr.ibv,
1092                                                         &cq_attr.mlx5));
1093         if (!sh->self_lb.ibv_cq) {
1094                 DRV_LOG(ERR, "Port %u cannot allocate CQ for loopback.",
1095                         dev->data->port_id);
1096                 rte_errno = errno;
1097                 goto error;
1098         }
1099         sh->self_lb.qp = mlx5_glue->dv_create_qp(ctx,
1100                                 &(struct ibv_qp_init_attr_ex){
1101                                         .qp_type = IBV_QPT_RAW_PACKET,
1102                                         .comp_mask = IBV_QP_INIT_ATTR_PD,
1103                                         .pd = sh->cdev->pd,
1104                                         .send_cq = sh->self_lb.ibv_cq,
1105                                         .recv_cq = sh->self_lb.ibv_cq,
1106                                         .cap.max_recv_wr = 1,
1107                                 },
1108                                 &qp_init_attr);
1109         if (!sh->self_lb.qp) {
1110                 DRV_LOG(DEBUG, "Port %u cannot allocate QP for loopback.",
1111                         dev->data->port_id);
1112                 rte_errno = errno;
1113                 goto error;
1114         }
1115         priv->lb_used = 1;
1116         return 0;
1117 error:
1118         if (sh->self_lb.ibv_cq) {
1119                 claim_zero(mlx5_glue->destroy_cq(sh->self_lb.ibv_cq));
1120                 sh->self_lb.ibv_cq = NULL;
1121         }
1122         (void)__atomic_sub_fetch(&sh->self_lb.refcnt, 1, __ATOMIC_RELAXED);
1123         return -rte_errno;
1124 #else
1125         RTE_SET_USED(dev);
1126         return 0;
1127 #endif
1128 }
1129
1130 /*
1131  * Release the dummy queue resources for loopback.
1132  *
1133  * @param dev
1134  *   Pointer to Ethernet device.
1135  */
1136 void
1137 mlx5_rxq_ibv_obj_dummy_lb_release(struct rte_eth_dev *dev)
1138 {
1139 #if defined(HAVE_IBV_DEVICE_TUNNEL_SUPPORT) && defined(HAVE_IBV_FLOW_DV_SUPPORT)
1140         struct mlx5_priv *priv = dev->data->dev_private;
1141         struct mlx5_dev_ctx_shared *sh = priv->sh;
1142
1143         if (!priv->lb_used)
1144                 return;
1145         MLX5_ASSERT(__atomic_load_n(&sh->self_lb.refcnt, __ATOMIC_RELAXED));
1146         if (!(__atomic_sub_fetch(&sh->self_lb.refcnt, 1, __ATOMIC_RELAXED))) {
1147                 if (sh->self_lb.qp) {
1148                         claim_zero(mlx5_glue->destroy_qp(sh->self_lb.qp));
1149                         sh->self_lb.qp = NULL;
1150                 }
1151                 if (sh->self_lb.ibv_cq) {
1152                         claim_zero(mlx5_glue->destroy_cq(sh->self_lb.ibv_cq));
1153                         sh->self_lb.ibv_cq = NULL;
1154                 }
1155         }
1156         priv->lb_used = 0;
1157 #else
1158         RTE_SET_USED(dev);
1159         return;
1160 #endif
1161 }
1162
1163 /**
1164  * Release an Tx verbs queue object.
1165  *
1166  * @param txq_obj
1167  *   Verbs Tx queue object..
1168  */
1169 void
1170 mlx5_txq_ibv_obj_release(struct mlx5_txq_obj *txq_obj)
1171 {
1172         MLX5_ASSERT(txq_obj);
1173         claim_zero(mlx5_glue->destroy_qp(txq_obj->qp));
1174         claim_zero(mlx5_glue->destroy_cq(txq_obj->cq));
1175 }
1176
1177 struct mlx5_obj_ops ibv_obj_ops = {
1178         .rxq_obj_modify_vlan_strip = mlx5_rxq_obj_modify_wq_vlan_strip,
1179         .rxq_obj_new = mlx5_rxq_ibv_obj_new,
1180         .rxq_event_get = mlx5_rx_ibv_get_event,
1181         .rxq_obj_modify = mlx5_ibv_modify_wq,
1182         .rxq_obj_release = mlx5_rxq_ibv_obj_release,
1183         .ind_table_new = mlx5_ibv_ind_table_new,
1184         .ind_table_destroy = mlx5_ibv_ind_table_destroy,
1185         .hrxq_new = mlx5_ibv_hrxq_new,
1186         .hrxq_destroy = mlx5_ibv_qp_destroy,
1187         .drop_action_create = mlx5_ibv_drop_action_create,
1188         .drop_action_destroy = mlx5_ibv_drop_action_destroy,
1189         .txq_obj_new = mlx5_txq_ibv_obj_new,
1190         .txq_obj_modify = mlx5_ibv_modify_qp,
1191         .txq_obj_release = mlx5_txq_ibv_obj_release,
1192         .lb_dummy_queue_create = NULL,
1193         .lb_dummy_queue_release = NULL,
1194 };