drivers/net/mlx5/mlx5_rxq.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright 2015 6WIND S.A.
   3  * Copyright 2015 Mellanox Technologies, Ltd
   4  */
   5
   6 #include <stddef.h>
   7 #include <assert.h>
   8 #include <errno.h>
   9 #include <string.h>
  10 #include <stdint.h>
  11 #include <fcntl.h>
  12 #include <sys/queue.h>
  13
  14 /* Verbs header. */
  15 /* ISO C doesn't support unnamed structs/unions, disabling -pedantic. */
  16 #ifdef PEDANTIC
  17 #pragma GCC diagnostic ignored "-Wpedantic"
  18 #endif
  19 #include <infiniband/verbs.h>
  20 #include <infiniband/mlx5dv.h>
  21 #ifdef PEDANTIC
  22 #pragma GCC diagnostic error "-Wpedantic"
  23 #endif
  24
  25 #include <rte_mbuf.h>
  26 #include <rte_malloc.h>
  27 #include <rte_ethdev_driver.h>
  28 #include <rte_common.h>
  29 #include <rte_interrupts.h>
  30 #include <rte_debug.h>
  31 #include <rte_io.h>
  32
  33 #include "mlx5.h"
  34 #include "mlx5_rxtx.h"
  35 #include "mlx5_utils.h"
  36 #include "mlx5_autoconf.h"
  37 #include "mlx5_defs.h"
  38 #include "mlx5_glue.h"
  39
  40 /* Default RSS hash key also used for ConnectX-3. */
  41 uint8_t rss_hash_default_key[] = {
  42         0x2c, 0xc6, 0x81, 0xd1,
  43         0x5b, 0xdb, 0xf4, 0xf7,
  44         0xfc, 0xa2, 0x83, 0x19,
  45         0xdb, 0x1a, 0x3e, 0x94,
  46         0x6b, 0x9e, 0x38, 0xd9,
  47         0x2c, 0x9c, 0x03, 0xd1,
  48         0xad, 0x99, 0x44, 0xa7,
  49         0xd9, 0x56, 0x3d, 0x59,
  50         0x06, 0x3c, 0x25, 0xf3,
  51         0xfc, 0x1f, 0xdc, 0x2a,
  52 };
  53
  54 /* Length of the default RSS hash key. */
  55 static_assert(MLX5_RSS_HASH_KEY_LEN ==
  56               (unsigned int)sizeof(rss_hash_default_key),
  57               "wrong RSS default key size.");
  58
  59 /**
  60  * Check whether Multi-Packet RQ can be enabled for the device.
  61  *
  62  * @param dev
  63  *   Pointer to Ethernet device.
  64  *
  65  * @return
  66  *   1 if supported, negative errno value if not.
  67  */
  68 inline int
  69 mlx5_check_mprq_support(struct rte_eth_dev *dev)
  70 {
  71         struct mlx5_priv *priv = dev->data->dev_private;
  72
  73         if (priv->config.mprq.enabled &&
  74             priv->rxqs_n >= priv->config.mprq.min_rxqs_num)
  75                 return 1;
  76         return -ENOTSUP;
  77 }
  78
  79 /**
  80  * Check whether Multi-Packet RQ is enabled for the Rx queue.
  81  *
  82  *  @param rxq
  83  *     Pointer to receive queue structure.
  84  *
  85  * @return
  86  *   0 if disabled, otherwise enabled.
  87  */
  88 inline int
  89 mlx5_rxq_mprq_enabled(struct mlx5_rxq_data *rxq)
  90 {
  91         return rxq->strd_num_n > 0;
  92 }
  93
  94 /**
  95  * Check whether Multi-Packet RQ is enabled for the device.
  96  *
  97  * @param dev
  98  *   Pointer to Ethernet device.
  99  *
 100  * @return
 101  *   0 if disabled, otherwise enabled.
 102  */
 103 inline int
 104 mlx5_mprq_enabled(struct rte_eth_dev *dev)
 105 {
 106         struct mlx5_priv *priv = dev->data->dev_private;
 107         uint16_t i;
 108         uint16_t n = 0;
 109
 110         if (mlx5_check_mprq_support(dev) < 0)
 111                 return 0;
 112         /* All the configured queues should be enabled. */
 113         for (i = 0; i < priv->rxqs_n; ++i) {
 114                 struct mlx5_rxq_data *rxq = (*priv->rxqs)[i];
 115
 116                 if (!rxq)
 117                         continue;
 118                 if (mlx5_rxq_mprq_enabled(rxq))
 119                         ++n;
 120         }
 121         /* Multi-Packet RQ can't be partially configured. */
 122         assert(n == 0 || n == priv->rxqs_n);
 123         return n == priv->rxqs_n;
 124 }
 125
 126 /**
 127  * Allocate RX queue elements for Multi-Packet RQ.
 128  *
 129  * @param rxq_ctrl
 130  *   Pointer to RX queue structure.
 131  *
 132  * @return
 133  *   0 on success, a negative errno value otherwise and rte_errno is set.
 134  */
 135 static int
 136 rxq_alloc_elts_mprq(struct mlx5_rxq_ctrl *rxq_ctrl)
 137 {
 138         struct mlx5_rxq_data *rxq = &rxq_ctrl->rxq;
 139         unsigned int wqe_n = 1 << rxq->elts_n;
 140         unsigned int i;
 141         int err;
 142
 143         /* Iterate on segments. */
 144         for (i = 0; i <= wqe_n; ++i) {
 145                 struct mlx5_mprq_buf *buf;
 146
 147                 if (rte_mempool_get(rxq->mprq_mp, (void **)&buf) < 0) {
 148                         DRV_LOG(ERR, "port %u empty mbuf pool", rxq->port_id);
 149                         rte_errno = ENOMEM;
 150                         goto error;
 151                 }
 152                 if (i < wqe_n)
 153                         (*rxq->mprq_bufs)[i] = buf;
 154                 else
 155                         rxq->mprq_repl = buf;
 156         }
 157         DRV_LOG(DEBUG,
 158                 "port %u Rx queue %u allocated and configured %u segments",
 159                 rxq->port_id, rxq->idx, wqe_n);
 160         return 0;
 161 error:
 162         err = rte_errno; /* Save rte_errno before cleanup. */
 163         wqe_n = i;
 164         for (i = 0; (i != wqe_n); ++i) {
 165                 if ((*rxq->mprq_bufs)[i] != NULL)
 166                         rte_mempool_put(rxq->mprq_mp,
 167                                         (*rxq->mprq_bufs)[i]);
 168                 (*rxq->mprq_bufs)[i] = NULL;
 169         }
 170         DRV_LOG(DEBUG, "port %u Rx queue %u failed, freed everything",
 171                 rxq->port_id, rxq->idx);
 172         rte_errno = err; /* Restore rte_errno. */
 173         return -rte_errno;
 174 }
 175
 176 /**
 177  * Allocate RX queue elements for Single-Packet RQ.
 178  *
 179  * @param rxq_ctrl
 180  *   Pointer to RX queue structure.
 181  *
 182  * @return
 183  *   0 on success, errno value on failure.
 184  */
 185 static int
 186 rxq_alloc_elts_sprq(struct mlx5_rxq_ctrl *rxq_ctrl)
 187 {
 188         const unsigned int sges_n = 1 << rxq_ctrl->rxq.sges_n;
 189         unsigned int elts_n = 1 << rxq_ctrl->rxq.elts_n;
 190         unsigned int i;
 191         int err;
 192
 193         /* Iterate on segments. */
 194         for (i = 0; (i != elts_n); ++i) {
 195                 struct rte_mbuf *buf;
 196
 197                 buf = rte_pktmbuf_alloc(rxq_ctrl->rxq.mp);
 198                 if (buf == NULL) {
 199                         DRV_LOG(ERR, "port %u empty mbuf pool",
 200                                 PORT_ID(rxq_ctrl->priv));
 201                         rte_errno = ENOMEM;
 202                         goto error;
 203                 }
 204                 /* Headroom is reserved by rte_pktmbuf_alloc(). */
 205                 assert(DATA_OFF(buf) == RTE_PKTMBUF_HEADROOM);
 206                 /* Buffer is supposed to be empty. */
 207                 assert(rte_pktmbuf_data_len(buf) == 0);
 208                 assert(rte_pktmbuf_pkt_len(buf) == 0);
 209                 assert(!buf->next);
 210                 /* Only the first segment keeps headroom. */
 211                 if (i % sges_n)
 212                         SET_DATA_OFF(buf, 0);
 213                 PORT(buf) = rxq_ctrl->rxq.port_id;
 214                 DATA_LEN(buf) = rte_pktmbuf_tailroom(buf);
 215                 PKT_LEN(buf) = DATA_LEN(buf);
 216                 NB_SEGS(buf) = 1;
 217                 (*rxq_ctrl->rxq.elts)[i] = buf;
 218         }
 219         /* If Rx vector is activated. */
 220         if (mlx5_rxq_check_vec_support(&rxq_ctrl->rxq) > 0) {
 221                 struct mlx5_rxq_data *rxq = &rxq_ctrl->rxq;
 222                 struct rte_mbuf *mbuf_init = &rxq->fake_mbuf;
 223                 int j;
 224
 225                 /* Initialize default rearm_data for vPMD. */
 226                 mbuf_init->data_off = RTE_PKTMBUF_HEADROOM;
 227                 rte_mbuf_refcnt_set(mbuf_init, 1);
 228                 mbuf_init->nb_segs = 1;
 229                 mbuf_init->port = rxq->port_id;
 230                 /*
 231                  * prevent compiler reordering:
 232                  * rearm_data covers previous fields.
 233                  */
 234                 rte_compiler_barrier();
 235                 rxq->mbuf_initializer =
 236                         *(uint64_t *)&mbuf_init->rearm_data;
 237                 /* Padding with a fake mbuf for vectorized Rx. */
 238                 for (j = 0; j < MLX5_VPMD_DESCS_PER_LOOP; ++j)
 239                         (*rxq->elts)[elts_n + j] = &rxq->fake_mbuf;
 240         }
 241         DRV_LOG(DEBUG,
 242                 "port %u Rx queue %u allocated and configured %u segments"
 243                 " (max %u packets)",
 244                 PORT_ID(rxq_ctrl->priv), rxq_ctrl->rxq.idx, elts_n,
 245                 elts_n / (1 << rxq_ctrl->rxq.sges_n));
 246         return 0;
 247 error:
 248         err = rte_errno; /* Save rte_errno before cleanup. */
 249         elts_n = i;
 250         for (i = 0; (i != elts_n); ++i) {
 251                 if ((*rxq_ctrl->rxq.elts)[i] != NULL)
 252                         rte_pktmbuf_free_seg((*rxq_ctrl->rxq.elts)[i]);
 253                 (*rxq_ctrl->rxq.elts)[i] = NULL;
 254         }
 255         DRV_LOG(DEBUG, "port %u Rx queue %u failed, freed everything",
 256                 PORT_ID(rxq_ctrl->priv), rxq_ctrl->rxq.idx);
 257         rte_errno = err; /* Restore rte_errno. */
 258         return -rte_errno;
 259 }
 260
 261 /**
 262  * Allocate RX queue elements.
 263  *
 264  * @param rxq_ctrl
 265  *   Pointer to RX queue structure.
 266  *
 267  * @return
 268  *   0 on success, errno value on failure.
 269  */
 270 int
 271 rxq_alloc_elts(struct mlx5_rxq_ctrl *rxq_ctrl)
 272 {
 273         return mlx5_rxq_mprq_enabled(&rxq_ctrl->rxq) ?
 274                rxq_alloc_elts_mprq(rxq_ctrl) : rxq_alloc_elts_sprq(rxq_ctrl);
 275 }
 276
 277 /**
 278  * Free RX queue elements for Multi-Packet RQ.
 279  *
 280  * @param rxq_ctrl
 281  *   Pointer to RX queue structure.
 282  */
 283 static void
 284 rxq_free_elts_mprq(struct mlx5_rxq_ctrl *rxq_ctrl)
 285 {
 286         struct mlx5_rxq_data *rxq = &rxq_ctrl->rxq;
 287         uint16_t i;
 288
 289         DRV_LOG(DEBUG, "port %u Multi-Packet Rx queue %u freeing WRs",
 290                 rxq->port_id, rxq->idx);
 291         if (rxq->mprq_bufs == NULL)
 292                 return;
 293         assert(mlx5_rxq_check_vec_support(rxq) < 0);
 294         for (i = 0; (i != (1u << rxq->elts_n)); ++i) {
 295                 if ((*rxq->mprq_bufs)[i] != NULL)
 296                         mlx5_mprq_buf_free((*rxq->mprq_bufs)[i]);
 297                 (*rxq->mprq_bufs)[i] = NULL;
 298         }
 299         if (rxq->mprq_repl != NULL) {
 300                 mlx5_mprq_buf_free(rxq->mprq_repl);
 301                 rxq->mprq_repl = NULL;
 302         }
 303 }
 304
 305 /**
 306  * Free RX queue elements for Single-Packet RQ.
 307  *
 308  * @param rxq_ctrl
 309  *   Pointer to RX queue structure.
 310  */
 311 static void
 312 rxq_free_elts_sprq(struct mlx5_rxq_ctrl *rxq_ctrl)
 313 {
 314         struct mlx5_rxq_data *rxq = &rxq_ctrl->rxq;
 315         const uint16_t q_n = (1 << rxq->elts_n);
 316         const uint16_t q_mask = q_n - 1;
 317         uint16_t used = q_n - (rxq->rq_ci - rxq->rq_pi);
 318         uint16_t i;
 319
 320         DRV_LOG(DEBUG, "port %u Rx queue %u freeing WRs",
 321                 PORT_ID(rxq_ctrl->priv), rxq->idx);
 322         if (rxq->elts == NULL)
 323                 return;
 324         /**
 325          * Some mbuf in the Ring belongs to the application.  They cannot be
 326          * freed.
 327          */
 328         if (mlx5_rxq_check_vec_support(rxq) > 0) {
 329                 for (i = 0; i < used; ++i)
 330                         (*rxq->elts)[(rxq->rq_ci + i) & q_mask] = NULL;
 331                 rxq->rq_pi = rxq->rq_ci;
 332         }
 333         for (i = 0; (i != (1u << rxq->elts_n)); ++i) {
 334                 if ((*rxq->elts)[i] != NULL)
 335                         rte_pktmbuf_free_seg((*rxq->elts)[i]);
 336                 (*rxq->elts)[i] = NULL;
 337         }
 338 }
 339
 340 /**
 341  * Free RX queue elements.
 342  *
 343  * @param rxq_ctrl
 344  *   Pointer to RX queue structure.
 345  */
 346 static void
 347 rxq_free_elts(struct mlx5_rxq_ctrl *rxq_ctrl)
 348 {
 349         if (mlx5_rxq_mprq_enabled(&rxq_ctrl->rxq))
 350                 rxq_free_elts_mprq(rxq_ctrl);
 351         else
 352                 rxq_free_elts_sprq(rxq_ctrl);
 353 }
 354
 355 /**
 356  * Returns the per-queue supported offloads.
 357  *
 358  * @param dev
 359  *   Pointer to Ethernet device.
 360  *
 361  * @return
 362  *   Supported Rx offloads.
 363  */
 364 uint64_t
 365 mlx5_get_rx_queue_offloads(struct rte_eth_dev *dev)
 366 {
 367         struct mlx5_priv *priv = dev->data->dev_private;
 368         struct mlx5_dev_config *config = &priv->config;
 369         uint64_t offloads = (DEV_RX_OFFLOAD_SCATTER |
 370                              DEV_RX_OFFLOAD_TIMESTAMP |
 371                              DEV_RX_OFFLOAD_JUMBO_FRAME);
 372
 373         if (config->hw_fcs_strip)
 374                 offloads |= DEV_RX_OFFLOAD_KEEP_CRC;
 375
 376         if (config->hw_csum)
 377                 offloads |= (DEV_RX_OFFLOAD_IPV4_CKSUM |
 378                              DEV_RX_OFFLOAD_UDP_CKSUM |
 379                              DEV_RX_OFFLOAD_TCP_CKSUM);
 380         if (config->hw_vlan_strip)
 381                 offloads |= DEV_RX_OFFLOAD_VLAN_STRIP;
 382         return offloads;
 383 }
 384
 385
 386 /**
 387  * Returns the per-port supported offloads.
 388  *
 389  * @return
 390  *   Supported Rx offloads.
 391  */
 392 uint64_t
 393 mlx5_get_rx_port_offloads(void)
 394 {
 395         uint64_t offloads = DEV_RX_OFFLOAD_VLAN_FILTER;
 396
 397         return offloads;
 398 }
 399
 400 /**
 401  * Verify if the queue can be released.
 402  *
 403  * @param dev
 404  *   Pointer to Ethernet device.
 405  * @param idx
 406  *   RX queue index.
 407  *
 408  * @return
 409  *   1 if the queue can be released
 410  *   0 if the queue can not be released, there are references to it.
 411  *   Negative errno and rte_errno is set if queue doesn't exist.
 412  */
 413 static int
 414 mlx5_rxq_releasable(struct rte_eth_dev *dev, uint16_t idx)
 415 {
 416         struct mlx5_priv *priv = dev->data->dev_private;
 417         struct mlx5_rxq_ctrl *rxq_ctrl;
 418
 419         if (!(*priv->rxqs)[idx]) {
 420                 rte_errno = EINVAL;
 421                 return -rte_errno;
 422         }
 423         rxq_ctrl = container_of((*priv->rxqs)[idx], struct mlx5_rxq_ctrl, rxq);
 424         return (rte_atomic32_read(&rxq_ctrl->refcnt) == 1);
 425 }
 426
 427 /**
 428  *
 429  * @param dev
 430  *   Pointer to Ethernet device structure.
 431  * @param idx
 432  *   RX queue index.
 433  * @param desc
 434  *   Number of descriptors to configure in queue.
 435  * @param socket
 436  *   NUMA socket on which memory must be allocated.
 437  * @param[in] conf
 438  *   Thresholds parameters.
 439  * @param mp
 440  *   Memory pool for buffer allocations.
 441  *
 442  * @return
 443  *   0 on success, a negative errno value otherwise and rte_errno is set.
 444  */
 445 int
 446 mlx5_rx_queue_setup(struct rte_eth_dev *dev, uint16_t idx, uint16_t desc,
 447                     unsigned int socket, const struct rte_eth_rxconf *conf,
 448                     struct rte_mempool *mp)
 449 {
 450         struct mlx5_priv *priv = dev->data->dev_private;
 451         struct mlx5_rxq_data *rxq = (*priv->rxqs)[idx];
 452         struct mlx5_rxq_ctrl *rxq_ctrl =
 453                 container_of(rxq, struct mlx5_rxq_ctrl, rxq);
 454
 455         if (!rte_is_power_of_2(desc)) {
 456                 desc = 1 << log2above(desc);
 457                 DRV_LOG(WARNING,
 458                         "port %u increased number of descriptors in Rx queue %u"
 459                         " to the next power of two (%d)",
 460                         dev->data->port_id, idx, desc);
 461         }
 462         DRV_LOG(DEBUG, "port %u configuring Rx queue %u for %u descriptors",
 463                 dev->data->port_id, idx, desc);
 464         if (idx >= priv->rxqs_n) {
 465                 DRV_LOG(ERR, "port %u Rx queue index out of range (%u >= %u)",
 466                         dev->data->port_id, idx, priv->rxqs_n);
 467                 rte_errno = EOVERFLOW;
 468                 return -rte_errno;
 469         }
 470         if (!mlx5_rxq_releasable(dev, idx)) {
 471                 DRV_LOG(ERR, "port %u unable to release queue index %u",
 472                         dev->data->port_id, idx);
 473                 rte_errno = EBUSY;
 474                 return -rte_errno;
 475         }
 476         mlx5_rxq_release(dev, idx);
 477         rxq_ctrl = mlx5_rxq_new(dev, idx, desc, socket, conf, mp);
 478         if (!rxq_ctrl) {
 479                 DRV_LOG(ERR, "port %u unable to allocate queue index %u",
 480                         dev->data->port_id, idx);
 481                 rte_errno = ENOMEM;
 482                 return -rte_errno;
 483         }
 484         DRV_LOG(DEBUG, "port %u adding Rx queue %u to list",
 485                 dev->data->port_id, idx);
 486         (*priv->rxqs)[idx] = &rxq_ctrl->rxq;
 487         return 0;
 488 }
 489
 490 /**
 491  * DPDK callback to release a RX queue.
 492  *
 493  * @param dpdk_rxq
 494  *   Generic RX queue pointer.
 495  */
 496 void
 497 mlx5_rx_queue_release(void *dpdk_rxq)
 498 {
 499         struct mlx5_rxq_data *rxq = (struct mlx5_rxq_data *)dpdk_rxq;
 500         struct mlx5_rxq_ctrl *rxq_ctrl;
 501         struct mlx5_priv *priv;
 502
 503         if (rxq == NULL)
 504                 return;
 505         rxq_ctrl = container_of(rxq, struct mlx5_rxq_ctrl, rxq);
 506         priv = rxq_ctrl->priv;
 507         if (!mlx5_rxq_releasable(ETH_DEV(priv), rxq_ctrl->rxq.idx))
 508                 rte_panic("port %u Rx queue %u is still used by a flow and"
 509                           " cannot be removed\n",
 510                           PORT_ID(priv), rxq->idx);
 511         mlx5_rxq_release(ETH_DEV(priv), rxq_ctrl->rxq.idx);
 512 }
 513
 514 /**
 515  * Get an Rx queue Verbs object.
 516  *
 517  * @param dev
 518  *   Pointer to Ethernet device.
 519  * @param idx
 520  *   Queue index in DPDK Rx queue array
 521  *
 522  * @return
 523  *   The Verbs object if it exists.
 524  */
 525 static struct mlx5_rxq_ibv *
 526 mlx5_rxq_ibv_get(struct rte_eth_dev *dev, uint16_t idx)
 527 {
 528         struct mlx5_priv *priv = dev->data->dev_private;
 529         struct mlx5_rxq_data *rxq_data = (*priv->rxqs)[idx];
 530         struct mlx5_rxq_ctrl *rxq_ctrl;
 531
 532         if (idx >= priv->rxqs_n)
 533                 return NULL;
 534         if (!rxq_data)
 535                 return NULL;
 536         rxq_ctrl = container_of(rxq_data, struct mlx5_rxq_ctrl, rxq);
 537         if (rxq_ctrl->ibv)
 538                 rte_atomic32_inc(&rxq_ctrl->ibv->refcnt);
 539         return rxq_ctrl->ibv;
 540 }
 541
 542 /**
 543  * Release an Rx verbs queue object.
 544  *
 545  * @param rxq_ibv
 546  *   Verbs Rx queue object.
 547  *
 548  * @return
 549  *   1 while a reference on it exists, 0 when freed.
 550  */
 551 static int
 552 mlx5_rxq_ibv_release(struct mlx5_rxq_ibv *rxq_ibv)
 553 {
 554         assert(rxq_ibv);
 555         assert(rxq_ibv->wq);
 556         assert(rxq_ibv->cq);
 557         if (rte_atomic32_dec_and_test(&rxq_ibv->refcnt)) {
 558                 rxq_free_elts(rxq_ibv->rxq_ctrl);
 559                 claim_zero(mlx5_glue->destroy_wq(rxq_ibv->wq));
 560                 claim_zero(mlx5_glue->destroy_cq(rxq_ibv->cq));
 561                 if (rxq_ibv->channel)
 562                         claim_zero(mlx5_glue->destroy_comp_channel
 563                                    (rxq_ibv->channel));
 564                 LIST_REMOVE(rxq_ibv, next);
 565                 rte_free(rxq_ibv);
 566                 return 0;
 567         }
 568         return 1;
 569 }
 570
 571 /**
 572  * Allocate queue vector and fill epoll fd list for Rx interrupts.
 573  *
 574  * @param dev
 575  *   Pointer to Ethernet device.
 576  *
 577  * @return
 578  *   0 on success, a negative errno value otherwise and rte_errno is set.
 579  */
 580 int
 581 mlx5_rx_intr_vec_enable(struct rte_eth_dev *dev)
 582 {
 583         struct mlx5_priv *priv = dev->data->dev_private;
 584         unsigned int i;
 585         unsigned int rxqs_n = priv->rxqs_n;
 586         unsigned int n = RTE_MIN(rxqs_n, (uint32_t)RTE_MAX_RXTX_INTR_VEC_ID);
 587         unsigned int count = 0;
 588         struct rte_intr_handle *intr_handle = dev->intr_handle;
 589
 590         if (!dev->data->dev_conf.intr_conf.rxq)
 591                 return 0;
 592         mlx5_rx_intr_vec_disable(dev);
 593         intr_handle->intr_vec = malloc(n * sizeof(intr_handle->intr_vec[0]));
 594         if (intr_handle->intr_vec == NULL) {
 595                 DRV_LOG(ERR,
 596                         "port %u failed to allocate memory for interrupt"
 597                         " vector, Rx interrupts will not be supported",
 598                         dev->data->port_id);
 599                 rte_errno = ENOMEM;
 600                 return -rte_errno;
 601         }
 602         intr_handle->type = RTE_INTR_HANDLE_EXT;
 603         for (i = 0; i != n; ++i) {
 604                 /* This rxq ibv must not be released in this function. */
 605                 struct mlx5_rxq_ibv *rxq_ibv = mlx5_rxq_ibv_get(dev, i);
 606                 int fd;
 607                 int flags;
 608                 int rc;
 609
 610                 /* Skip queues that cannot request interrupts. */
 611                 if (!rxq_ibv || !rxq_ibv->channel) {
 612                         /* Use invalid intr_vec[] index to disable entry. */
 613                         intr_handle->intr_vec[i] =
 614                                 RTE_INTR_VEC_RXTX_OFFSET +
 615                                 RTE_MAX_RXTX_INTR_VEC_ID;
 616                         continue;
 617                 }
 618                 if (count >= RTE_MAX_RXTX_INTR_VEC_ID) {
 619                         DRV_LOG(ERR,
 620                                 "port %u too many Rx queues for interrupt"
 621                                 " vector size (%d), Rx interrupts cannot be"
 622                                 " enabled",
 623                                 dev->data->port_id, RTE_MAX_RXTX_INTR_VEC_ID);
 624                         mlx5_rx_intr_vec_disable(dev);
 625                         rte_errno = ENOMEM;
 626                         return -rte_errno;
 627                 }
 628                 fd = rxq_ibv->channel->fd;
 629                 flags = fcntl(fd, F_GETFL);
 630                 rc = fcntl(fd, F_SETFL, flags | O_NONBLOCK);
 631                 if (rc < 0) {
 632                         rte_errno = errno;
 633                         DRV_LOG(ERR,
 634                                 "port %u failed to make Rx interrupt file"
 635                                 " descriptor %d non-blocking for queue index"
 636                                 " %d",
 637                                 dev->data->port_id, fd, i);
 638                         mlx5_rx_intr_vec_disable(dev);
 639                         return -rte_errno;
 640                 }
 641                 intr_handle->intr_vec[i] = RTE_INTR_VEC_RXTX_OFFSET + count;
 642                 intr_handle->efds[count] = fd;
 643                 count++;
 644         }
 645         if (!count)
 646                 mlx5_rx_intr_vec_disable(dev);
 647         else
 648                 intr_handle->nb_efd = count;
 649         return 0;
 650 }
 651
 652 /**
 653  * Clean up Rx interrupts handler.
 654  *
 655  * @param dev
 656  *   Pointer to Ethernet device.
 657  */
 658 void
 659 mlx5_rx_intr_vec_disable(struct rte_eth_dev *dev)
 660 {
 661         struct mlx5_priv *priv = dev->data->dev_private;
 662         struct rte_intr_handle *intr_handle = dev->intr_handle;
 663         unsigned int i;
 664         unsigned int rxqs_n = priv->rxqs_n;
 665         unsigned int n = RTE_MIN(rxqs_n, (uint32_t)RTE_MAX_RXTX_INTR_VEC_ID);
 666
 667         if (!dev->data->dev_conf.intr_conf.rxq)
 668                 return;
 669         if (!intr_handle->intr_vec)
 670                 goto free;
 671         for (i = 0; i != n; ++i) {
 672                 struct mlx5_rxq_ctrl *rxq_ctrl;
 673                 struct mlx5_rxq_data *rxq_data;
 674
 675                 if (intr_handle->intr_vec[i] == RTE_INTR_VEC_RXTX_OFFSET +
 676                     RTE_MAX_RXTX_INTR_VEC_ID)
 677                         continue;
 678                 /**
 679                  * Need to access directly the queue to release the reference
 680                  * kept in mlx5_rx_intr_vec_enable().
 681                  */
 682                 rxq_data = (*priv->rxqs)[i];
 683                 rxq_ctrl = container_of(rxq_data, struct mlx5_rxq_ctrl, rxq);
 684                 if (rxq_ctrl->ibv)
 685                         mlx5_rxq_ibv_release(rxq_ctrl->ibv);
 686         }
 687 free:
 688         rte_intr_free_epoll_fd(intr_handle);
 689         if (intr_handle->intr_vec)
 690                 free(intr_handle->intr_vec);
 691         intr_handle->nb_efd = 0;
 692         intr_handle->intr_vec = NULL;
 693 }
 694
 695 /**
 696  *  MLX5 CQ notification .
 697  *
 698  *  @param rxq
 699  *     Pointer to receive queue structure.
 700  *  @param sq_n_rxq
 701  *     Sequence number per receive queue .
 702  */
 703 static inline void
 704 mlx5_arm_cq(struct mlx5_rxq_data *rxq, int sq_n_rxq)
 705 {
 706         int sq_n = 0;
 707         uint32_t doorbell_hi;
 708         uint64_t doorbell;
 709         void *cq_db_reg = (char *)rxq->cq_uar + MLX5_CQ_DOORBELL;
 710
 711         sq_n = sq_n_rxq & MLX5_CQ_SQN_MASK;
 712         doorbell_hi = sq_n << MLX5_CQ_SQN_OFFSET | (rxq->cq_ci & MLX5_CI_MASK);
 713         doorbell = (uint64_t)doorbell_hi << 32;
 714         doorbell |=  rxq->cqn;
 715         rxq->cq_db[MLX5_CQ_ARM_DB] = rte_cpu_to_be_32(doorbell_hi);
 716         mlx5_uar_write64(rte_cpu_to_be_64(doorbell),
 717                          cq_db_reg, rxq->uar_lock_cq);
 718 }
 719
 720 /**
 721  * DPDK callback for Rx queue interrupt enable.
 722  *
 723  * @param dev
 724  *   Pointer to Ethernet device structure.
 725  * @param rx_queue_id
 726  *   Rx queue number.
 727  *
 728  * @return
 729  *   0 on success, a negative errno value otherwise and rte_errno is set.
 730  */
 731 int
 732 mlx5_rx_intr_enable(struct rte_eth_dev *dev, uint16_t rx_queue_id)
 733 {
 734         struct mlx5_priv *priv = dev->data->dev_private;
 735         struct mlx5_rxq_data *rxq_data;
 736         struct mlx5_rxq_ctrl *rxq_ctrl;
 737
 738         rxq_data = (*priv->rxqs)[rx_queue_id];
 739         if (!rxq_data) {
 740                 rte_errno = EINVAL;
 741                 return -rte_errno;
 742         }
 743         rxq_ctrl = container_of(rxq_data, struct mlx5_rxq_ctrl, rxq);
 744         if (rxq_ctrl->irq) {
 745                 struct mlx5_rxq_ibv *rxq_ibv;
 746
 747                 rxq_ibv = mlx5_rxq_ibv_get(dev, rx_queue_id);
 748                 if (!rxq_ibv) {
 749                         rte_errno = EINVAL;
 750                         return -rte_errno;
 751                 }
 752                 mlx5_arm_cq(rxq_data, rxq_data->cq_arm_sn);
 753                 mlx5_rxq_ibv_release(rxq_ibv);
 754         }
 755         return 0;
 756 }
 757
 758 /**
 759  * DPDK callback for Rx queue interrupt disable.
 760  *
 761  * @param dev
 762  *   Pointer to Ethernet device structure.
 763  * @param rx_queue_id
 764  *   Rx queue number.
 765  *
 766  * @return
 767  *   0 on success, a negative errno value otherwise and rte_errno is set.
 768  */
 769 int
 770 mlx5_rx_intr_disable(struct rte_eth_dev *dev, uint16_t rx_queue_id)
 771 {
 772         struct mlx5_priv *priv = dev->data->dev_private;
 773         struct mlx5_rxq_data *rxq_data;
 774         struct mlx5_rxq_ctrl *rxq_ctrl;
 775         struct mlx5_rxq_ibv *rxq_ibv = NULL;
 776         struct ibv_cq *ev_cq;
 777         void *ev_ctx;
 778         int ret;
 779
 780         rxq_data = (*priv->rxqs)[rx_queue_id];
 781         if (!rxq_data) {
 782                 rte_errno = EINVAL;
 783                 return -rte_errno;
 784         }
 785         rxq_ctrl = container_of(rxq_data, struct mlx5_rxq_ctrl, rxq);
 786         if (!rxq_ctrl->irq)
 787                 return 0;
 788         rxq_ibv = mlx5_rxq_ibv_get(dev, rx_queue_id);
 789         if (!rxq_ibv) {
 790                 rte_errno = EINVAL;
 791                 return -rte_errno;
 792         }
 793         ret = mlx5_glue->get_cq_event(rxq_ibv->channel, &ev_cq, &ev_ctx);
 794         if (ret || ev_cq != rxq_ibv->cq) {
 795                 rte_errno = EINVAL;
 796                 goto exit;
 797         }
 798         rxq_data->cq_arm_sn++;
 799         mlx5_glue->ack_cq_events(rxq_ibv->cq, 1);
 800         mlx5_rxq_ibv_release(rxq_ibv);
 801         return 0;
 802 exit:
 803         ret = rte_errno; /* Save rte_errno before cleanup. */
 804         if (rxq_ibv)
 805                 mlx5_rxq_ibv_release(rxq_ibv);
 806         DRV_LOG(WARNING, "port %u unable to disable interrupt on Rx queue %d",
 807                 dev->data->port_id, rx_queue_id);
 808         rte_errno = ret; /* Restore rte_errno. */
 809         return -rte_errno;
 810 }
 811
 812 /**
 813  * Create the Rx queue Verbs object.
 814  *
 815  * @param dev
 816  *   Pointer to Ethernet device.
 817  * @param idx
 818  *   Queue index in DPDK Rx queue array
 819  *
 820  * @return
 821  *   The Verbs object initialised, NULL otherwise and rte_errno is set.
 822  */
 823 struct mlx5_rxq_ibv *
 824 mlx5_rxq_ibv_new(struct rte_eth_dev *dev, uint16_t idx)
 825 {
 826         struct mlx5_priv *priv = dev->data->dev_private;
 827         struct mlx5_rxq_data *rxq_data = (*priv->rxqs)[idx];
 828         struct mlx5_rxq_ctrl *rxq_ctrl =
 829                 container_of(rxq_data, struct mlx5_rxq_ctrl, rxq);
 830         struct ibv_wq_attr mod;
 831         union {
 832                 struct {
 833                         struct ibv_cq_init_attr_ex ibv;
 834                         struct mlx5dv_cq_init_attr mlx5;
 835                 } cq;
 836                 struct {
 837                         struct ibv_wq_init_attr ibv;
 838 #ifdef HAVE_IBV_DEVICE_STRIDING_RQ_SUPPORT
 839                         struct mlx5dv_wq_init_attr mlx5;
 840 #endif
 841                 } wq;
 842                 struct ibv_cq_ex cq_attr;
 843         } attr;
 844         unsigned int cqe_n;
 845         unsigned int wqe_n = 1 << rxq_data->elts_n;
 846         struct mlx5_rxq_ibv *tmpl = NULL;
 847         struct mlx5dv_cq cq_info;
 848         struct mlx5dv_rwq rwq;
 849         unsigned int i;
 850         int ret = 0;
 851         struct mlx5dv_obj obj;
 852         struct mlx5_dev_config *config = &priv->config;
 853         const int mprq_en = mlx5_rxq_mprq_enabled(rxq_data);
 854
 855         assert(rxq_data);
 856         assert(!rxq_ctrl->ibv);
 857         priv->verbs_alloc_ctx.type = MLX5_VERBS_ALLOC_TYPE_RX_QUEUE;
 858         priv->verbs_alloc_ctx.obj = rxq_ctrl;
 859         tmpl = rte_calloc_socket(__func__, 1, sizeof(*tmpl), 0,
 860                                  rxq_ctrl->socket);
 861         if (!tmpl) {
 862                 DRV_LOG(ERR,
 863                         "port %u Rx queue %u cannot allocate verbs resources",
 864                         dev->data->port_id, rxq_data->idx);
 865                 rte_errno = ENOMEM;
 866                 goto error;
 867         }
 868         tmpl->rxq_ctrl = rxq_ctrl;
 869         if (rxq_ctrl->irq) {
 870                 tmpl->channel = mlx5_glue->create_comp_channel(priv->sh->ctx);
 871                 if (!tmpl->channel) {
 872                         DRV_LOG(ERR, "port %u: comp channel creation failure",
 873                                 dev->data->port_id);
 874                         rte_errno = ENOMEM;
 875                         goto error;
 876                 }
 877         }
 878         if (mprq_en)
 879                 cqe_n = wqe_n * (1 << rxq_data->strd_num_n) - 1;
 880         else
 881                 cqe_n = wqe_n  - 1;
 882         attr.cq.ibv = (struct ibv_cq_init_attr_ex){
 883                 .cqe = cqe_n,
 884                 .channel = tmpl->channel,
 885                 .comp_mask = 0,
 886         };
 887         attr.cq.mlx5 = (struct mlx5dv_cq_init_attr){
 888                 .comp_mask = 0,
 889         };
 890         if (config->cqe_comp && !rxq_data->hw_timestamp) {
 891                 attr.cq.mlx5.comp_mask |=
 892                         MLX5DV_CQ_INIT_ATTR_MASK_COMPRESSED_CQE;
 893 #ifdef HAVE_IBV_DEVICE_STRIDING_RQ_SUPPORT
 894                 attr.cq.mlx5.cqe_comp_res_format =
 895                         mprq_en ? MLX5DV_CQE_RES_FORMAT_CSUM_STRIDX :
 896                                   MLX5DV_CQE_RES_FORMAT_HASH;
 897 #else
 898                 attr.cq.mlx5.cqe_comp_res_format = MLX5DV_CQE_RES_FORMAT_HASH;
 899 #endif
 900                 /*
 901                  * For vectorized Rx, it must not be doubled in order to
 902                  * make cq_ci and rq_ci aligned.
 903                  */
 904                 if (mlx5_rxq_check_vec_support(rxq_data) < 0)
 905                         attr.cq.ibv.cqe *= 2;
 906         } else if (config->cqe_comp && rxq_data->hw_timestamp) {
 907                 DRV_LOG(DEBUG,
 908                         "port %u Rx CQE compression is disabled for HW"
 909                         " timestamp",
 910                         dev->data->port_id);
 911         }
 912 #ifdef HAVE_IBV_MLX5_MOD_CQE_128B_PAD
 913         if (config->cqe_pad) {
 914                 attr.cq.mlx5.comp_mask |= MLX5DV_CQ_INIT_ATTR_MASK_FLAGS;
 915                 attr.cq.mlx5.flags |= MLX5DV_CQ_INIT_ATTR_FLAGS_CQE_PAD;
 916         }
 917 #endif
 918         tmpl->cq = mlx5_glue->cq_ex_to_cq
 919                 (mlx5_glue->dv_create_cq(priv->sh->ctx, &attr.cq.ibv,
 920                                          &attr.cq.mlx5));
 921         if (tmpl->cq == NULL) {
 922                 DRV_LOG(ERR, "port %u Rx queue %u CQ creation failure",
 923                         dev->data->port_id, idx);
 924                 rte_errno = ENOMEM;
 925                 goto error;
 926         }
 927         DRV_LOG(DEBUG, "port %u device_attr.max_qp_wr is %d",
 928                 dev->data->port_id, priv->sh->device_attr.orig_attr.max_qp_wr);
 929         DRV_LOG(DEBUG, "port %u device_attr.max_sge is %d",
 930                 dev->data->port_id, priv->sh->device_attr.orig_attr.max_sge);
 931         attr.wq.ibv = (struct ibv_wq_init_attr){
 932                 .wq_context = NULL, /* Could be useful in the future. */
 933                 .wq_type = IBV_WQT_RQ,
 934                 /* Max number of outstanding WRs. */
 935                 .max_wr = wqe_n >> rxq_data->sges_n,
 936                 /* Max number of scatter/gather elements in a WR. */
 937                 .max_sge = 1 << rxq_data->sges_n,
 938                 .pd = priv->sh->pd,
 939                 .cq = tmpl->cq,
 940                 .comp_mask =
 941                         IBV_WQ_FLAGS_CVLAN_STRIPPING |
 942                         0,
 943                 .create_flags = (rxq_data->vlan_strip ?
 944                                  IBV_WQ_FLAGS_CVLAN_STRIPPING :
 945                                  0),
 946         };
 947         /* By default, FCS (CRC) is stripped by hardware. */
 948         if (rxq_data->crc_present) {
 949                 attr.wq.ibv.create_flags |= IBV_WQ_FLAGS_SCATTER_FCS;
 950                 attr.wq.ibv.comp_mask |= IBV_WQ_INIT_ATTR_FLAGS;
 951         }
 952         if (config->hw_padding) {
 953 #if defined(HAVE_IBV_WQ_FLAG_RX_END_PADDING)
 954                 attr.wq.ibv.create_flags |= IBV_WQ_FLAG_RX_END_PADDING;
 955                 attr.wq.ibv.comp_mask |= IBV_WQ_INIT_ATTR_FLAGS;
 956 #elif defined(HAVE_IBV_WQ_FLAGS_PCI_WRITE_END_PADDING)
 957                 attr.wq.ibv.create_flags |= IBV_WQ_FLAGS_PCI_WRITE_END_PADDING;
 958                 attr.wq.ibv.comp_mask |= IBV_WQ_INIT_ATTR_FLAGS;
 959 #endif
 960         }
 961 #ifdef HAVE_IBV_DEVICE_STRIDING_RQ_SUPPORT
 962         attr.wq.mlx5 = (struct mlx5dv_wq_init_attr){
 963                 .comp_mask = 0,
 964         };
 965         if (mprq_en) {
 966                 struct mlx5dv_striding_rq_init_attr *mprq_attr =
 967                         &attr.wq.mlx5.striding_rq_attrs;
 968
 969                 attr.wq.mlx5.comp_mask |= MLX5DV_WQ_INIT_ATTR_MASK_STRIDING_RQ;
 970                 *mprq_attr = (struct mlx5dv_striding_rq_init_attr){
 971                         .single_stride_log_num_of_bytes = rxq_data->strd_sz_n,
 972                         .single_wqe_log_num_of_strides = rxq_data->strd_num_n,
 973                         .two_byte_shift_en = MLX5_MPRQ_TWO_BYTE_SHIFT,
 974                 };
 975         }
 976         tmpl->wq = mlx5_glue->dv_create_wq(priv->sh->ctx, &attr.wq.ibv,
 977                                            &attr.wq.mlx5);
 978 #else
 979         tmpl->wq = mlx5_glue->create_wq(priv->sh->ctx, &attr.wq.ibv);
 980 #endif
 981         if (tmpl->wq == NULL) {
 982                 DRV_LOG(ERR, "port %u Rx queue %u WQ creation failure",
 983                         dev->data->port_id, idx);
 984                 rte_errno = ENOMEM;
 985                 goto error;
 986         }
 987         /*
 988          * Make sure number of WRs*SGEs match expectations since a queue
 989          * cannot allocate more than "desc" buffers.
 990          */
 991         if (attr.wq.ibv.max_wr != (wqe_n >> rxq_data->sges_n) ||
 992             attr.wq.ibv.max_sge != (1u << rxq_data->sges_n)) {
 993                 DRV_LOG(ERR,
 994                         "port %u Rx queue %u requested %u*%u but got %u*%u"
 995                         " WRs*SGEs",
 996                         dev->data->port_id, idx,
 997                         wqe_n >> rxq_data->sges_n, (1 << rxq_data->sges_n),
 998                         attr.wq.ibv.max_wr, attr.wq.ibv.max_sge);
 999                 rte_errno = EINVAL;
1000                 goto error;
1001         }
1002         /* Change queue state to ready. */
1003         mod = (struct ibv_wq_attr){
1004                 .attr_mask = IBV_WQ_ATTR_STATE,
1005                 .wq_state = IBV_WQS_RDY,
1006         };
1007         ret = mlx5_glue->modify_wq(tmpl->wq, &mod);
1008         if (ret) {
1009                 DRV_LOG(ERR,
1010                         "port %u Rx queue %u WQ state to IBV_WQS_RDY failed",
1011                         dev->data->port_id, idx);
1012                 rte_errno = ret;
1013                 goto error;
1014         }
1015         obj.cq.in = tmpl->cq;
1016         obj.cq.out = &cq_info;
1017         obj.rwq.in = tmpl->wq;
1018         obj.rwq.out = &rwq;
1019         ret = mlx5_glue->dv_init_obj(&obj, MLX5DV_OBJ_CQ | MLX5DV_OBJ_RWQ);
1020         if (ret) {
1021                 rte_errno = ret;
1022                 goto error;
1023         }
1024         if (cq_info.cqe_size != RTE_CACHE_LINE_SIZE) {
1025                 DRV_LOG(ERR,
1026                         "port %u wrong MLX5_CQE_SIZE environment variable"
1027                         " value: it should be set to %u",
1028                         dev->data->port_id, RTE_CACHE_LINE_SIZE);
1029                 rte_errno = EINVAL;
1030                 goto error;
1031         }
1032         /* Fill the rings. */
1033         rxq_data->wqes = rwq.buf;
1034         for (i = 0; (i != wqe_n); ++i) {
1035                 volatile struct mlx5_wqe_data_seg *scat;
1036                 uintptr_t addr;
1037                 uint32_t byte_count;
1038
1039                 if (mprq_en) {
1040                         struct mlx5_mprq_buf *buf = (*rxq_data->mprq_bufs)[i];
1041
1042                         scat = &((volatile struct mlx5_wqe_mprq *)
1043                                  rxq_data->wqes)[i].dseg;
1044                         addr = (uintptr_t)mlx5_mprq_buf_addr(buf);
1045                         byte_count = (1 << rxq_data->strd_sz_n) *
1046                                      (1 << rxq_data->strd_num_n);
1047                 } else {
1048                         struct rte_mbuf *buf = (*rxq_data->elts)[i];
1049
1050                         scat = &((volatile struct mlx5_wqe_data_seg *)
1051                                  rxq_data->wqes)[i];
1052                         addr = rte_pktmbuf_mtod(buf, uintptr_t);
1053                         byte_count = DATA_LEN(buf);
1054                 }
1055                 /* scat->addr must be able to store a pointer. */
1056                 assert(sizeof(scat->addr) >= sizeof(uintptr_t));
1057                 *scat = (struct mlx5_wqe_data_seg){
1058                         .addr = rte_cpu_to_be_64(addr),
1059                         .byte_count = rte_cpu_to_be_32(byte_count),
1060                         .lkey = mlx5_rx_addr2mr(rxq_data, addr),
1061                 };
1062         }
1063         rxq_data->rq_db = rwq.dbrec;
1064         rxq_data->cqe_n = log2above(cq_info.cqe_cnt);
1065         rxq_data->cq_ci = 0;
1066         rxq_data->consumed_strd = 0;
1067         rxq_data->rq_pi = 0;
1068         rxq_data->zip = (struct rxq_zip){
1069                 .ai = 0,
1070         };
1071         rxq_data->cq_db = cq_info.dbrec;
1072         rxq_data->cqes = (volatile struct mlx5_cqe (*)[])(uintptr_t)cq_info.buf;
1073         rxq_data->cq_uar = cq_info.cq_uar;
1074         rxq_data->cqn = cq_info.cqn;
1075         rxq_data->cq_arm_sn = 0;
1076         /* Update doorbell counter. */
1077         rxq_data->rq_ci = wqe_n >> rxq_data->sges_n;
1078         rte_wmb();
1079         *rxq_data->rq_db = rte_cpu_to_be_32(rxq_data->rq_ci);
1080         DRV_LOG(DEBUG, "port %u rxq %u updated with %p", dev->data->port_id,
1081                 idx, (void *)&tmpl);
1082         rte_atomic32_inc(&tmpl->refcnt);
1083         LIST_INSERT_HEAD(&priv->rxqsibv, tmpl, next);
1084         priv->verbs_alloc_ctx.type = MLX5_VERBS_ALLOC_TYPE_NONE;
1085         return tmpl;
1086 error:
1087         if (tmpl) {
1088                 ret = rte_errno; /* Save rte_errno before cleanup. */
1089                 if (tmpl->wq)
1090                         claim_zero(mlx5_glue->destroy_wq(tmpl->wq));
1091                 if (tmpl->cq)
1092                         claim_zero(mlx5_glue->destroy_cq(tmpl->cq));
1093                 if (tmpl->channel)
1094                         claim_zero(mlx5_glue->destroy_comp_channel
1095                                                         (tmpl->channel));
1096                 rte_free(tmpl);
1097                 rte_errno = ret; /* Restore rte_errno. */
1098         }
1099         priv->verbs_alloc_ctx.type = MLX5_VERBS_ALLOC_TYPE_NONE;
1100         return NULL;
1101 }
1102
1103 /**
1104  * Verify the Verbs Rx queue list is empty
1105  *
1106  * @param dev
1107  *   Pointer to Ethernet device.
1108  *
1109  * @return
1110  *   The number of object not released.
1111  */
1112 int
1113 mlx5_rxq_ibv_verify(struct rte_eth_dev *dev)
1114 {
1115         struct mlx5_priv *priv = dev->data->dev_private;
1116         int ret = 0;
1117         struct mlx5_rxq_ibv *rxq_ibv;
1118
1119         LIST_FOREACH(rxq_ibv, &priv->rxqsibv, next) {
1120                 DRV_LOG(DEBUG, "port %u Verbs Rx queue %u still referenced",
1121                         dev->data->port_id, rxq_ibv->rxq_ctrl->rxq.idx);
1122                 ++ret;
1123         }
1124         return ret;
1125 }
1126
1127 /**
1128  * Callback function to initialize mbufs for Multi-Packet RQ.
1129  */
1130 static inline void
1131 mlx5_mprq_buf_init(struct rte_mempool *mp, void *opaque_arg __rte_unused,
1132                     void *_m, unsigned int i __rte_unused)
1133 {
1134         struct mlx5_mprq_buf *buf = _m;
1135
1136         memset(_m, 0, sizeof(*buf));
1137         buf->mp = mp;
1138         rte_atomic16_set(&buf->refcnt, 1);
1139 }
1140
1141 /**
1142  * Free mempool of Multi-Packet RQ.
1143  *
1144  * @param dev
1145  *   Pointer to Ethernet device.
1146  *
1147  * @return
1148  *   0 on success, negative errno value on failure.
1149  */
1150 int
1151 mlx5_mprq_free_mp(struct rte_eth_dev *dev)
1152 {
1153         struct mlx5_priv *priv = dev->data->dev_private;
1154         struct rte_mempool *mp = priv->mprq_mp;
1155         unsigned int i;
1156
1157         if (mp == NULL)
1158                 return 0;
1159         DRV_LOG(DEBUG, "port %u freeing mempool (%s) for Multi-Packet RQ",
1160                 dev->data->port_id, mp->name);
1161         /*
1162          * If a buffer in the pool has been externally attached to a mbuf and it
1163          * is still in use by application, destroying the Rx qeueue can spoil
1164          * the packet. It is unlikely to happen but if application dynamically
1165          * creates and destroys with holding Rx packets, this can happen.
1166          *
1167          * TODO: It is unavoidable for now because the mempool for Multi-Packet
1168          * RQ isn't provided by application but managed by PMD.
1169          */
1170         if (!rte_mempool_full(mp)) {
1171                 DRV_LOG(ERR,
1172                         "port %u mempool for Multi-Packet RQ is still in use",
1173                         dev->data->port_id);
1174                 rte_errno = EBUSY;
1175                 return -rte_errno;
1176         }
1177         rte_mempool_free(mp);
1178         /* Unset mempool for each Rx queue. */
1179         for (i = 0; i != priv->rxqs_n; ++i) {
1180                 struct mlx5_rxq_data *rxq = (*priv->rxqs)[i];
1181
1182                 if (rxq == NULL)
1183                         continue;
1184                 rxq->mprq_mp = NULL;
1185         }
1186         priv->mprq_mp = NULL;
1187         return 0;
1188 }
1189
1190 /**
1191  * Allocate a mempool for Multi-Packet RQ. All configured Rx queues share the
1192  * mempool. If already allocated, reuse it if there're enough elements.
1193  * Otherwise, resize it.
1194  *
1195  * @param dev
1196  *   Pointer to Ethernet device.
1197  *
1198  * @return
1199  *   0 on success, negative errno value on failure.
1200  */
1201 int
1202 mlx5_mprq_alloc_mp(struct rte_eth_dev *dev)
1203 {
1204         struct mlx5_priv *priv = dev->data->dev_private;
1205         struct rte_mempool *mp = priv->mprq_mp;
1206         char name[RTE_MEMPOOL_NAMESIZE];
1207         unsigned int desc = 0;
1208         unsigned int buf_len;
1209         unsigned int obj_num;
1210         unsigned int obj_size;
1211         unsigned int strd_num_n = 0;
1212         unsigned int strd_sz_n = 0;
1213         unsigned int i;
1214
1215         if (!mlx5_mprq_enabled(dev))
1216                 return 0;
1217         /* Count the total number of descriptors configured. */
1218         for (i = 0; i != priv->rxqs_n; ++i) {
1219                 struct mlx5_rxq_data *rxq = (*priv->rxqs)[i];
1220
1221                 if (rxq == NULL)
1222                         continue;
1223                 desc += 1 << rxq->elts_n;
1224                 /* Get the max number of strides. */
1225                 if (strd_num_n < rxq->strd_num_n)
1226                         strd_num_n = rxq->strd_num_n;
1227                 /* Get the max size of a stride. */
1228                 if (strd_sz_n < rxq->strd_sz_n)
1229                         strd_sz_n = rxq->strd_sz_n;
1230         }
1231         assert(strd_num_n && strd_sz_n);
1232         buf_len = (1 << strd_num_n) * (1 << strd_sz_n);
1233         obj_size = buf_len + sizeof(struct mlx5_mprq_buf);
1234         /*
1235          * Received packets can be either memcpy'd or externally referenced. In
1236          * case that the packet is attached to an mbuf as an external buffer, as
1237          * it isn't possible to predict how the buffers will be queued by
1238          * application, there's no option to exactly pre-allocate needed buffers
1239          * in advance but to speculatively prepares enough buffers.
1240          *
1241          * In the data path, if this Mempool is depleted, PMD will try to memcpy
1242          * received packets to buffers provided by application (rxq->mp) until
1243          * this Mempool gets available again.
1244          */
1245         desc *= 4;
1246         obj_num = desc + MLX5_MPRQ_MP_CACHE_SZ * priv->rxqs_n;
1247         /*
1248          * rte_mempool_create_empty() has sanity check to refuse large cache
1249          * size compared to the number of elements.
1250          * CACHE_FLUSHTHRESH_MULTIPLIER is defined in a C file, so using a
1251          * constant number 2 instead.
1252          */
1253         obj_num = RTE_MAX(obj_num, MLX5_MPRQ_MP_CACHE_SZ * 2);
1254         /* Check a mempool is already allocated and if it can be resued. */
1255         if (mp != NULL && mp->elt_size >= obj_size && mp->size >= obj_num) {
1256                 DRV_LOG(DEBUG, "port %u mempool %s is being reused",
1257                         dev->data->port_id, mp->name);
1258                 /* Reuse. */
1259                 goto exit;
1260         } else if (mp != NULL) {
1261                 DRV_LOG(DEBUG, "port %u mempool %s should be resized, freeing it",
1262                         dev->data->port_id, mp->name);
1263                 /*
1264                  * If failed to free, which means it may be still in use, no way
1265                  * but to keep using the existing one. On buffer underrun,
1266                  * packets will be memcpy'd instead of external buffer
1267                  * attachment.
1268                  */
1269                 if (mlx5_mprq_free_mp(dev)) {
1270                         if (mp->elt_size >= obj_size)
1271                                 goto exit;
1272                         else
1273                                 return -rte_errno;
1274                 }
1275         }
1276         snprintf(name, sizeof(name), "port-%u-mprq", dev->data->port_id);
1277         mp = rte_mempool_create(name, obj_num, obj_size, MLX5_MPRQ_MP_CACHE_SZ,
1278                                 0, NULL, NULL, mlx5_mprq_buf_init, NULL,
1279                                 dev->device->numa_node, 0);
1280         if (mp == NULL) {
1281                 DRV_LOG(ERR,
1282                         "port %u failed to allocate a mempool for"
1283                         " Multi-Packet RQ, count=%u, size=%u",
1284                         dev->data->port_id, obj_num, obj_size);
1285                 rte_errno = ENOMEM;
1286                 return -rte_errno;
1287         }
1288         priv->mprq_mp = mp;
1289 exit:
1290         /* Set mempool for each Rx queue. */
1291         for (i = 0; i != priv->rxqs_n; ++i) {
1292                 struct mlx5_rxq_data *rxq = (*priv->rxqs)[i];
1293
1294                 if (rxq == NULL)
1295                         continue;
1296                 rxq->mprq_mp = mp;
1297         }
1298         DRV_LOG(INFO, "port %u Multi-Packet RQ is configured",
1299                 dev->data->port_id);
1300         return 0;
1301 }
1302
1303 /**
1304  * Create a DPDK Rx queue.
1305  *
1306  * @param dev
1307  *   Pointer to Ethernet device.
1308  * @param idx
1309  *   RX queue index.
1310  * @param desc
1311  *   Number of descriptors to configure in queue.
1312  * @param socket
1313  *   NUMA socket on which memory must be allocated.
1314  *
1315  * @return
1316  *   A DPDK queue object on success, NULL otherwise and rte_errno is set.
1317  */
1318 struct mlx5_rxq_ctrl *
1319 mlx5_rxq_new(struct rte_eth_dev *dev, uint16_t idx, uint16_t desc,
1320              unsigned int socket, const struct rte_eth_rxconf *conf,
1321              struct rte_mempool *mp)
1322 {
1323         struct mlx5_priv *priv = dev->data->dev_private;
1324         struct mlx5_rxq_ctrl *tmpl;
1325         unsigned int mb_len = rte_pktmbuf_data_room_size(mp);
1326         unsigned int mprq_stride_size;
1327         struct mlx5_dev_config *config = &priv->config;
1328         /*
1329          * Always allocate extra slots, even if eventually
1330          * the vector Rx will not be used.
1331          */
1332         uint16_t desc_n =
1333                 desc + config->rx_vec_en * MLX5_VPMD_DESCS_PER_LOOP;
1334         uint64_t offloads = conf->offloads |
1335                            dev->data->dev_conf.rxmode.offloads;
1336         const int mprq_en = mlx5_check_mprq_support(dev) > 0;
1337
1338         tmpl = rte_calloc_socket("RXQ", 1,
1339                                  sizeof(*tmpl) +
1340                                  desc_n * sizeof(struct rte_mbuf *),
1341                                  0, socket);
1342         if (!tmpl) {
1343                 rte_errno = ENOMEM;
1344                 return NULL;
1345         }
1346         if (mlx5_mr_btree_init(&tmpl->rxq.mr_ctrl.cache_bh,
1347                                MLX5_MR_BTREE_CACHE_N, socket)) {
1348                 /* rte_errno is already set. */
1349                 goto error;
1350         }
1351         tmpl->socket = socket;
1352         if (dev->data->dev_conf.intr_conf.rxq)
1353                 tmpl->irq = 1;
1354         /*
1355          * This Rx queue can be configured as a Multi-Packet RQ if all of the
1356          * following conditions are met:
1357          *  - MPRQ is enabled.
1358          *  - The number of descs is more than the number of strides.
1359          *  - max_rx_pkt_len plus overhead is less than the max size of a
1360          *    stride.
1361          *  Otherwise, enable Rx scatter if necessary.
1362          */
1363         assert(mb_len >= RTE_PKTMBUF_HEADROOM);
1364         mprq_stride_size =
1365                 dev->data->dev_conf.rxmode.max_rx_pkt_len +
1366                 sizeof(struct rte_mbuf_ext_shared_info) +
1367                 RTE_PKTMBUF_HEADROOM;
1368         if (mprq_en &&
1369             desc > (1U << config->mprq.stride_num_n) &&
1370             mprq_stride_size <= (1U << config->mprq.max_stride_size_n)) {
1371                 /* TODO: Rx scatter isn't supported yet. */
1372                 tmpl->rxq.sges_n = 0;
1373                 /* Trim the number of descs needed. */
1374                 desc >>= config->mprq.stride_num_n;
1375                 tmpl->rxq.strd_num_n = config->mprq.stride_num_n;
1376                 tmpl->rxq.strd_sz_n = RTE_MAX(log2above(mprq_stride_size),
1377                                               config->mprq.min_stride_size_n);
1378                 tmpl->rxq.strd_shift_en = MLX5_MPRQ_TWO_BYTE_SHIFT;
1379                 tmpl->rxq.mprq_max_memcpy_len =
1380                         RTE_MIN(mb_len - RTE_PKTMBUF_HEADROOM,
1381                                 config->mprq.max_memcpy_len);
1382                 DRV_LOG(DEBUG,
1383                         "port %u Rx queue %u: Multi-Packet RQ is enabled"
1384                         " strd_num_n = %u, strd_sz_n = %u",
1385                         dev->data->port_id, idx,
1386                         tmpl->rxq.strd_num_n, tmpl->rxq.strd_sz_n);
1387         } else if (dev->data->dev_conf.rxmode.max_rx_pkt_len <=
1388                    (mb_len - RTE_PKTMBUF_HEADROOM)) {
1389                 tmpl->rxq.sges_n = 0;
1390         } else if (offloads & DEV_RX_OFFLOAD_SCATTER) {
1391                 unsigned int size =
1392                         RTE_PKTMBUF_HEADROOM +
1393                         dev->data->dev_conf.rxmode.max_rx_pkt_len;
1394                 unsigned int sges_n;
1395
1396                 /*
1397                  * Determine the number of SGEs needed for a full packet
1398                  * and round it to the next power of two.
1399                  */
1400                 sges_n = log2above((size / mb_len) + !!(size % mb_len));
1401                 tmpl->rxq.sges_n = sges_n;
1402                 /* Make sure rxq.sges_n did not overflow. */
1403                 size = mb_len * (1 << tmpl->rxq.sges_n);
1404                 size -= RTE_PKTMBUF_HEADROOM;
1405                 if (size < dev->data->dev_conf.rxmode.max_rx_pkt_len) {
1406                         DRV_LOG(ERR,
1407                                 "port %u too many SGEs (%u) needed to handle"
1408                                 " requested maximum packet size %u",
1409                                 dev->data->port_id,
1410                                 1 << sges_n,
1411                                 dev->data->dev_conf.rxmode.max_rx_pkt_len);
1412                         rte_errno = EOVERFLOW;
1413                         goto error;
1414                 }
1415         } else {
1416                 DRV_LOG(WARNING,
1417                         "port %u the requested maximum Rx packet size (%u) is"
1418                         " larger than a single mbuf (%u) and scattered mode has"
1419                         " not been requested",
1420                         dev->data->port_id,
1421                         dev->data->dev_conf.rxmode.max_rx_pkt_len,
1422                         mb_len - RTE_PKTMBUF_HEADROOM);
1423         }
1424         if (mprq_en && !mlx5_rxq_mprq_enabled(&tmpl->rxq))
1425                 DRV_LOG(WARNING,
1426                         "port %u MPRQ is requested but cannot be enabled"
1427                         " (requested: desc = %u, stride_sz = %u,"
1428                         " supported: min_stride_num = %u, max_stride_sz = %u).",
1429                         dev->data->port_id, desc, mprq_stride_size,
1430                         (1 << config->mprq.stride_num_n),
1431                         (1 << config->mprq.max_stride_size_n));
1432         DRV_LOG(DEBUG, "port %u maximum number of segments per packet: %u",
1433                 dev->data->port_id, 1 << tmpl->rxq.sges_n);
1434         if (desc % (1 << tmpl->rxq.sges_n)) {
1435                 DRV_LOG(ERR,
1436                         "port %u number of Rx queue descriptors (%u) is not a"
1437                         " multiple of SGEs per packet (%u)",
1438                         dev->data->port_id,
1439                         desc,
1440                         1 << tmpl->rxq.sges_n);
1441                 rte_errno = EINVAL;
1442                 goto error;
1443         }
1444         /* Toggle RX checksum offload if hardware supports it. */
1445         tmpl->rxq.csum = !!(offloads & DEV_RX_OFFLOAD_CHECKSUM);
1446         tmpl->rxq.hw_timestamp = !!(offloads & DEV_RX_OFFLOAD_TIMESTAMP);
1447         /* Configure VLAN stripping. */
1448         tmpl->rxq.vlan_strip = !!(offloads & DEV_RX_OFFLOAD_VLAN_STRIP);
1449         /* By default, FCS (CRC) is stripped by hardware. */
1450         tmpl->rxq.crc_present = 0;
1451         if (offloads & DEV_RX_OFFLOAD_KEEP_CRC) {
1452                 if (config->hw_fcs_strip) {
1453                         tmpl->rxq.crc_present = 1;
1454                 } else {
1455                         DRV_LOG(WARNING,
1456                                 "port %u CRC stripping has been disabled but will"
1457                                 " still be performed by hardware, make sure MLNX_OFED"
1458                                 " and firmware are up to date",
1459                                 dev->data->port_id);
1460                 }
1461         }
1462         DRV_LOG(DEBUG,
1463                 "port %u CRC stripping is %s, %u bytes will be subtracted from"
1464                 " incoming frames to hide it",
1465                 dev->data->port_id,
1466                 tmpl->rxq.crc_present ? "disabled" : "enabled",
1467                 tmpl->rxq.crc_present << 2);
1468         /* Save port ID. */
1469         tmpl->rxq.rss_hash = !!priv->rss_conf.rss_hf &&
1470                 (!!(dev->data->dev_conf.rxmode.mq_mode & ETH_MQ_RX_RSS));
1471         tmpl->rxq.port_id = dev->data->port_id;
1472         tmpl->priv = priv;
1473         tmpl->rxq.mp = mp;
1474         tmpl->rxq.elts_n = log2above(desc);
1475         tmpl->rxq.rq_repl_thresh =
1476                 MLX5_VPMD_RXQ_RPLNSH_THRESH(1 << tmpl->rxq.elts_n);
1477         tmpl->rxq.elts =
1478                 (struct rte_mbuf *(*)[1 << tmpl->rxq.elts_n])(tmpl + 1);
1479 #ifndef RTE_ARCH_64
1480         tmpl->rxq.uar_lock_cq = &priv->uar_lock_cq;
1481 #endif
1482         tmpl->rxq.idx = idx;
1483         rte_atomic32_inc(&tmpl->refcnt);
1484         LIST_INSERT_HEAD(&priv->rxqsctrl, tmpl, next);
1485         return tmpl;
1486 error:
1487         rte_free(tmpl);
1488         return NULL;
1489 }
1490
1491 /**
1492  * Get a Rx queue.
1493  *
1494  * @param dev
1495  *   Pointer to Ethernet device.
1496  * @param idx
1497  *   RX queue index.
1498  *
1499  * @return
1500  *   A pointer to the queue if it exists, NULL otherwise.
1501  */
1502 struct mlx5_rxq_ctrl *
1503 mlx5_rxq_get(struct rte_eth_dev *dev, uint16_t idx)
1504 {
1505         struct mlx5_priv *priv = dev->data->dev_private;
1506         struct mlx5_rxq_ctrl *rxq_ctrl = NULL;
1507
1508         if ((*priv->rxqs)[idx]) {
1509                 rxq_ctrl = container_of((*priv->rxqs)[idx],
1510                                         struct mlx5_rxq_ctrl,
1511                                         rxq);
1512                 mlx5_rxq_ibv_get(dev, idx);
1513                 rte_atomic32_inc(&rxq_ctrl->refcnt);
1514         }
1515         return rxq_ctrl;
1516 }
1517
1518 /**
1519  * Release a Rx queue.
1520  *
1521  * @param dev
1522  *   Pointer to Ethernet device.
1523  * @param idx
1524  *   RX queue index.
1525  *
1526  * @return
1527  *   1 while a reference on it exists, 0 when freed.
1528  */
1529 int
1530 mlx5_rxq_release(struct rte_eth_dev *dev, uint16_t idx)
1531 {
1532         struct mlx5_priv *priv = dev->data->dev_private;
1533         struct mlx5_rxq_ctrl *rxq_ctrl;
1534
1535         if (!(*priv->rxqs)[idx])
1536                 return 0;
1537         rxq_ctrl = container_of((*priv->rxqs)[idx], struct mlx5_rxq_ctrl, rxq);
1538         assert(rxq_ctrl->priv);
1539         if (rxq_ctrl->ibv && !mlx5_rxq_ibv_release(rxq_ctrl->ibv))
1540                 rxq_ctrl->ibv = NULL;
1541         if (rte_atomic32_dec_and_test(&rxq_ctrl->refcnt)) {
1542                 mlx5_mr_btree_free(&rxq_ctrl->rxq.mr_ctrl.cache_bh);
1543                 LIST_REMOVE(rxq_ctrl, next);
1544                 rte_free(rxq_ctrl);
1545                 (*priv->rxqs)[idx] = NULL;
1546                 return 0;
1547         }
1548         return 1;
1549 }
1550
1551 /**
1552  * Verify the Rx Queue list is empty
1553  *
1554  * @param dev
1555  *   Pointer to Ethernet device.
1556  *
1557  * @return
1558  *   The number of object not released.
1559  */
1560 int
1561 mlx5_rxq_verify(struct rte_eth_dev *dev)
1562 {
1563         struct mlx5_priv *priv = dev->data->dev_private;
1564         struct mlx5_rxq_ctrl *rxq_ctrl;
1565         int ret = 0;
1566
1567         LIST_FOREACH(rxq_ctrl, &priv->rxqsctrl, next) {
1568                 DRV_LOG(DEBUG, "port %u Rx Queue %u still referenced",
1569                         dev->data->port_id, rxq_ctrl->rxq.idx);
1570                 ++ret;
1571         }
1572         return ret;
1573 }
1574
1575 /**
1576  * Create an indirection table.
1577  *
1578  * @param dev
1579  *   Pointer to Ethernet device.
1580  * @param queues
1581  *   Queues entering in the indirection table.
1582  * @param queues_n
1583  *   Number of queues in the array.
1584  *
1585  * @return
1586  *   The Verbs object initialised, NULL otherwise and rte_errno is set.
1587  */
1588 static struct mlx5_ind_table_ibv *
1589 mlx5_ind_table_ibv_new(struct rte_eth_dev *dev, const uint16_t *queues,
1590                        uint32_t queues_n)
1591 {
1592         struct mlx5_priv *priv = dev->data->dev_private;
1593         struct mlx5_ind_table_ibv *ind_tbl;
1594         const unsigned int wq_n = rte_is_power_of_2(queues_n) ?
1595                 log2above(queues_n) :
1596                 log2above(priv->config.ind_table_max_size);
1597         struct ibv_wq *wq[1 << wq_n];
1598         unsigned int i;
1599         unsigned int j;
1600
1601         ind_tbl = rte_calloc(__func__, 1, sizeof(*ind_tbl) +
1602                              queues_n * sizeof(uint16_t), 0);
1603         if (!ind_tbl) {
1604                 rte_errno = ENOMEM;
1605                 return NULL;
1606         }
1607         for (i = 0; i != queues_n; ++i) {
1608                 struct mlx5_rxq_ctrl *rxq = mlx5_rxq_get(dev, queues[i]);
1609
1610                 if (!rxq)
1611                         goto error;
1612                 wq[i] = rxq->ibv->wq;
1613                 ind_tbl->queues[i] = queues[i];
1614         }
1615         ind_tbl->queues_n = queues_n;
1616         /* Finalise indirection table. */
1617         for (j = 0; i != (unsigned int)(1 << wq_n); ++i, ++j)
1618                 wq[i] = wq[j];
1619         ind_tbl->ind_table = mlx5_glue->create_rwq_ind_table
1620                 (priv->sh->ctx,
1621                  &(struct ibv_rwq_ind_table_init_attr){
1622                         .log_ind_tbl_size = wq_n,
1623                         .ind_tbl = wq,
1624                         .comp_mask = 0,
1625                  });
1626         if (!ind_tbl->ind_table) {
1627                 rte_errno = errno;
1628                 goto error;
1629         }
1630         rte_atomic32_inc(&ind_tbl->refcnt);
1631         LIST_INSERT_HEAD(&priv->ind_tbls, ind_tbl, next);
1632         return ind_tbl;
1633 error:
1634         rte_free(ind_tbl);
1635         DEBUG("port %u cannot create indirection table", dev->data->port_id);
1636         return NULL;
1637 }
1638
1639 /**
1640  * Get an indirection table.
1641  *
1642  * @param dev
1643  *   Pointer to Ethernet device.
1644  * @param queues
1645  *   Queues entering in the indirection table.
1646  * @param queues_n
1647  *   Number of queues in the array.
1648  *
1649  * @return
1650  *   An indirection table if found.
1651  */
1652 static struct mlx5_ind_table_ibv *
1653 mlx5_ind_table_ibv_get(struct rte_eth_dev *dev, const uint16_t *queues,
1654                        uint32_t queues_n)
1655 {
1656         struct mlx5_priv *priv = dev->data->dev_private;
1657         struct mlx5_ind_table_ibv *ind_tbl;
1658
1659         LIST_FOREACH(ind_tbl, &priv->ind_tbls, next) {
1660                 if ((ind_tbl->queues_n == queues_n) &&
1661                     (memcmp(ind_tbl->queues, queues,
1662                             ind_tbl->queues_n * sizeof(ind_tbl->queues[0]))
1663                      == 0))
1664                         break;
1665         }
1666         if (ind_tbl) {
1667                 unsigned int i;
1668
1669                 rte_atomic32_inc(&ind_tbl->refcnt);
1670                 for (i = 0; i != ind_tbl->queues_n; ++i)
1671                         mlx5_rxq_get(dev, ind_tbl->queues[i]);
1672         }
1673         return ind_tbl;
1674 }
1675
1676 /**
1677  * Release an indirection table.
1678  *
1679  * @param dev
1680  *   Pointer to Ethernet device.
1681  * @param ind_table
1682  *   Indirection table to release.
1683  *
1684  * @return
1685  *   1 while a reference on it exists, 0 when freed.
1686  */
1687 static int
1688 mlx5_ind_table_ibv_release(struct rte_eth_dev *dev,
1689                            struct mlx5_ind_table_ibv *ind_tbl)
1690 {
1691         unsigned int i;
1692
1693         if (rte_atomic32_dec_and_test(&ind_tbl->refcnt))
1694                 claim_zero(mlx5_glue->destroy_rwq_ind_table
1695                            (ind_tbl->ind_table));
1696         for (i = 0; i != ind_tbl->queues_n; ++i)
1697                 claim_nonzero(mlx5_rxq_release(dev, ind_tbl->queues[i]));
1698         if (!rte_atomic32_read(&ind_tbl->refcnt)) {
1699                 LIST_REMOVE(ind_tbl, next);
1700                 rte_free(ind_tbl);
1701                 return 0;
1702         }
1703         return 1;
1704 }
1705
1706 /**
1707  * Verify the Rx Queue list is empty
1708  *
1709  * @param dev
1710  *   Pointer to Ethernet device.
1711  *
1712  * @return
1713  *   The number of object not released.
1714  */
1715 int
1716 mlx5_ind_table_ibv_verify(struct rte_eth_dev *dev)
1717 {
1718         struct mlx5_priv *priv = dev->data->dev_private;
1719         struct mlx5_ind_table_ibv *ind_tbl;
1720         int ret = 0;
1721
1722         LIST_FOREACH(ind_tbl, &priv->ind_tbls, next) {
1723                 DRV_LOG(DEBUG,
1724                         "port %u Verbs indirection table %p still referenced",
1725                         dev->data->port_id, (void *)ind_tbl);
1726                 ++ret;
1727         }
1728         return ret;
1729 }
1730
1731 /**
1732  * Create an Rx Hash queue.
1733  *
1734  * @param dev
1735  *   Pointer to Ethernet device.
1736  * @param rss_key
1737  *   RSS key for the Rx hash queue.
1738  * @param rss_key_len
1739  *   RSS key length.
1740  * @param hash_fields
1741  *   Verbs protocol hash field to make the RSS on.
1742  * @param queues
1743  *   Queues entering in hash queue. In case of empty hash_fields only the
1744  *   first queue index will be taken for the indirection table.
1745  * @param queues_n
1746  *   Number of queues.
1747  * @param tunnel
1748  *   Tunnel type.
1749  *
1750  * @return
1751  *   The Verbs object initialised, NULL otherwise and rte_errno is set.
1752  */
1753 struct mlx5_hrxq *
1754 mlx5_hrxq_new(struct rte_eth_dev *dev,
1755               const uint8_t *rss_key, uint32_t rss_key_len,
1756               uint64_t hash_fields,
1757               const uint16_t *queues, uint32_t queues_n,
1758               int tunnel __rte_unused)
1759 {
1760         struct mlx5_priv *priv = dev->data->dev_private;
1761         struct mlx5_hrxq *hrxq;
1762         struct mlx5_ind_table_ibv *ind_tbl;
1763         struct ibv_qp *qp;
1764 #ifdef HAVE_IBV_DEVICE_TUNNEL_SUPPORT
1765         struct mlx5dv_qp_init_attr qp_init_attr;
1766 #endif
1767         int err;
1768
1769         queues_n = hash_fields ? queues_n : 1;
1770         ind_tbl = mlx5_ind_table_ibv_get(dev, queues, queues_n);
1771         if (!ind_tbl)
1772                 ind_tbl = mlx5_ind_table_ibv_new(dev, queues, queues_n);
1773         if (!ind_tbl) {
1774                 rte_errno = ENOMEM;
1775                 return NULL;
1776         }
1777 #ifdef HAVE_IBV_DEVICE_TUNNEL_SUPPORT
1778         memset(&qp_init_attr, 0, sizeof(qp_init_attr));
1779         if (tunnel) {
1780                 qp_init_attr.comp_mask =
1781                                 MLX5DV_QP_INIT_ATTR_MASK_QP_CREATE_FLAGS;
1782                 qp_init_attr.create_flags = MLX5DV_QP_CREATE_TUNNEL_OFFLOADS;
1783         }
1784 #ifdef HAVE_IBV_FLOW_DV_SUPPORT
1785         if (dev->data->dev_conf.lpbk_mode) {
1786                 /* Allow packet sent from NIC loop back w/o source MAC check. */
1787                 qp_init_attr.comp_mask |=
1788                                 MLX5DV_QP_INIT_ATTR_MASK_QP_CREATE_FLAGS;
1789                 qp_init_attr.create_flags |=
1790                                 MLX5DV_QP_CREATE_TIR_ALLOW_SELF_LOOPBACK_UC;
1791         }
1792 #endif
1793         qp = mlx5_glue->dv_create_qp
1794                 (priv->sh->ctx,
1795                  &(struct ibv_qp_init_attr_ex){
1796                         .qp_type = IBV_QPT_RAW_PACKET,
1797                         .comp_mask =
1798                                 IBV_QP_INIT_ATTR_PD |
1799                                 IBV_QP_INIT_ATTR_IND_TABLE |
1800                                 IBV_QP_INIT_ATTR_RX_HASH,
1801                         .rx_hash_conf = (struct ibv_rx_hash_conf){
1802                                 .rx_hash_function = IBV_RX_HASH_FUNC_TOEPLITZ,
1803                                 .rx_hash_key_len = rss_key_len,
1804                                 .rx_hash_key = (void *)(uintptr_t)rss_key,
1805                                 .rx_hash_fields_mask = hash_fields,
1806                         },
1807                         .rwq_ind_tbl = ind_tbl->ind_table,
1808                         .pd = priv->sh->pd,
1809                  },
1810                  &qp_init_attr);
1811 #else
1812         qp = mlx5_glue->create_qp_ex
1813                 (priv->sh->ctx,
1814                  &(struct ibv_qp_init_attr_ex){
1815                         .qp_type = IBV_QPT_RAW_PACKET,
1816                         .comp_mask =
1817                                 IBV_QP_INIT_ATTR_PD |
1818                                 IBV_QP_INIT_ATTR_IND_TABLE |
1819                                 IBV_QP_INIT_ATTR_RX_HASH,
1820                         .rx_hash_conf = (struct ibv_rx_hash_conf){
1821                                 .rx_hash_function = IBV_RX_HASH_FUNC_TOEPLITZ,
1822                                 .rx_hash_key_len = rss_key_len,
1823                                 .rx_hash_key = (void *)(uintptr_t)rss_key,
1824                                 .rx_hash_fields_mask = hash_fields,
1825                         },
1826                         .rwq_ind_tbl = ind_tbl->ind_table,
1827                         .pd = priv->sh->pd,
1828                  });
1829 #endif
1830         if (!qp) {
1831                 rte_errno = errno;
1832                 goto error;
1833         }
1834         hrxq = rte_calloc(__func__, 1, sizeof(*hrxq) + rss_key_len, 0);
1835         if (!hrxq)
1836                 goto error;
1837         hrxq->ind_table = ind_tbl;
1838         hrxq->qp = qp;
1839         hrxq->rss_key_len = rss_key_len;
1840         hrxq->hash_fields = hash_fields;
1841         memcpy(hrxq->rss_key, rss_key, rss_key_len);
1842 #ifdef HAVE_IBV_FLOW_DV_SUPPORT
1843         hrxq->action = mlx5_glue->dv_create_flow_action_dest_ibv_qp(hrxq->qp);
1844         if (!hrxq->action) {
1845                 rte_errno = errno;
1846                 goto error;
1847         }
1848 #endif
1849         rte_atomic32_inc(&hrxq->refcnt);
1850         LIST_INSERT_HEAD(&priv->hrxqs, hrxq, next);
1851         return hrxq;
1852 error:
1853         err = rte_errno; /* Save rte_errno before cleanup. */
1854         mlx5_ind_table_ibv_release(dev, ind_tbl);
1855         if (qp)
1856                 claim_zero(mlx5_glue->destroy_qp(qp));
1857         rte_errno = err; /* Restore rte_errno. */
1858         return NULL;
1859 }
1860
1861 /**
1862  * Get an Rx Hash queue.
1863  *
1864  * @param dev
1865  *   Pointer to Ethernet device.
1866  * @param rss_conf
1867  *   RSS configuration for the Rx hash queue.
1868  * @param queues
1869  *   Queues entering in hash queue. In case of empty hash_fields only the
1870  *   first queue index will be taken for the indirection table.
1871  * @param queues_n
1872  *   Number of queues.
1873  *
1874  * @return
1875  *   An hash Rx queue on success.
1876  */
1877 struct mlx5_hrxq *
1878 mlx5_hrxq_get(struct rte_eth_dev *dev,
1879               const uint8_t *rss_key, uint32_t rss_key_len,
1880               uint64_t hash_fields,
1881               const uint16_t *queues, uint32_t queues_n)
1882 {
1883         struct mlx5_priv *priv = dev->data->dev_private;
1884         struct mlx5_hrxq *hrxq;
1885
1886         queues_n = hash_fields ? queues_n : 1;
1887         LIST_FOREACH(hrxq, &priv->hrxqs, next) {
1888                 struct mlx5_ind_table_ibv *ind_tbl;
1889
1890                 if (hrxq->rss_key_len != rss_key_len)
1891                         continue;
1892                 if (memcmp(hrxq->rss_key, rss_key, rss_key_len))
1893                         continue;
1894                 if (hrxq->hash_fields != hash_fields)
1895                         continue;
1896                 ind_tbl = mlx5_ind_table_ibv_get(dev, queues, queues_n);
1897                 if (!ind_tbl)
1898                         continue;
1899                 if (ind_tbl != hrxq->ind_table) {
1900                         mlx5_ind_table_ibv_release(dev, ind_tbl);
1901                         continue;
1902                 }
1903                 rte_atomic32_inc(&hrxq->refcnt);
1904                 return hrxq;
1905         }
1906         return NULL;
1907 }
1908
1909 /**
1910  * Release the hash Rx queue.
1911  *
1912  * @param dev
1913  *   Pointer to Ethernet device.
1914  * @param hrxq
1915  *   Pointer to Hash Rx queue to release.
1916  *
1917  * @return
1918  *   1 while a reference on it exists, 0 when freed.
1919  */
1920 int
1921 mlx5_hrxq_release(struct rte_eth_dev *dev, struct mlx5_hrxq *hrxq)
1922 {
1923         if (rte_atomic32_dec_and_test(&hrxq->refcnt)) {
1924 #ifdef HAVE_IBV_FLOW_DV_SUPPORT
1925                 mlx5_glue->destroy_flow_action(hrxq->action);
1926 #endif
1927                 claim_zero(mlx5_glue->destroy_qp(hrxq->qp));
1928                 mlx5_ind_table_ibv_release(dev, hrxq->ind_table);
1929                 LIST_REMOVE(hrxq, next);
1930                 rte_free(hrxq);
1931                 return 0;
1932         }
1933         claim_nonzero(mlx5_ind_table_ibv_release(dev, hrxq->ind_table));
1934         return 1;
1935 }
1936
1937 /**
1938  * Verify the Rx Queue list is empty
1939  *
1940  * @param dev
1941  *   Pointer to Ethernet device.
1942  *
1943  * @return
1944  *   The number of object not released.
1945  */
1946 int
1947 mlx5_hrxq_ibv_verify(struct rte_eth_dev *dev)
1948 {
1949         struct mlx5_priv *priv = dev->data->dev_private;
1950         struct mlx5_hrxq *hrxq;
1951         int ret = 0;
1952
1953         LIST_FOREACH(hrxq, &priv->hrxqs, next) {
1954                 DRV_LOG(DEBUG,
1955                         "port %u Verbs hash Rx queue %p still referenced",
1956                         dev->data->port_id, (void *)hrxq);
1957                 ++ret;
1958         }
1959         return ret;
1960 }
1961
1962 /**
1963  * Create a drop Rx queue Verbs object.
1964  *
1965  * @param dev
1966  *   Pointer to Ethernet device.
1967  *
1968  * @return
1969  *   The Verbs object initialised, NULL otherwise and rte_errno is set.
1970  */
1971 static struct mlx5_rxq_ibv *
1972 mlx5_rxq_ibv_drop_new(struct rte_eth_dev *dev)
1973 {
1974         struct mlx5_priv *priv = dev->data->dev_private;
1975         struct ibv_context *ctx = priv->sh->ctx;
1976         struct ibv_cq *cq;
1977         struct ibv_wq *wq = NULL;
1978         struct mlx5_rxq_ibv *rxq;
1979
1980         if (priv->drop_queue.rxq)
1981                 return priv->drop_queue.rxq;
1982         cq = mlx5_glue->create_cq(ctx, 1, NULL, NULL, 0);
1983         if (!cq) {
1984                 DEBUG("port %u cannot allocate CQ for drop queue",
1985                       dev->data->port_id);
1986                 rte_errno = errno;
1987                 goto error;
1988         }
1989         wq = mlx5_glue->create_wq(ctx,
1990                  &(struct ibv_wq_init_attr){
1991                         .wq_type = IBV_WQT_RQ,
1992                         .max_wr = 1,
1993                         .max_sge = 1,
1994                         .pd = priv->sh->pd,
1995                         .cq = cq,
1996                  });
1997         if (!wq) {
1998                 DEBUG("port %u cannot allocate WQ for drop queue",
1999                       dev->data->port_id);
2000                 rte_errno = errno;
2001                 goto error;
2002         }
2003         rxq = rte_calloc(__func__, 1, sizeof(*rxq), 0);
2004         if (!rxq) {
2005                 DEBUG("port %u cannot allocate drop Rx queue memory",
2006                       dev->data->port_id);
2007                 rte_errno = ENOMEM;
2008                 goto error;
2009         }
2010         rxq->cq = cq;
2011         rxq->wq = wq;
2012         priv->drop_queue.rxq = rxq;
2013         return rxq;
2014 error:
2015         if (wq)
2016                 claim_zero(mlx5_glue->destroy_wq(wq));
2017         if (cq)
2018                 claim_zero(mlx5_glue->destroy_cq(cq));
2019         return NULL;
2020 }
2021
2022 /**
2023  * Release a drop Rx queue Verbs object.
2024  *
2025  * @param dev
2026  *   Pointer to Ethernet device.
2027  *
2028  * @return
2029  *   The Verbs object initialised, NULL otherwise and rte_errno is set.
2030  */
2031 static void
2032 mlx5_rxq_ibv_drop_release(struct rte_eth_dev *dev)
2033 {
2034         struct mlx5_priv *priv = dev->data->dev_private;
2035         struct mlx5_rxq_ibv *rxq = priv->drop_queue.rxq;
2036
2037         if (rxq->wq)
2038                 claim_zero(mlx5_glue->destroy_wq(rxq->wq));
2039         if (rxq->cq)
2040                 claim_zero(mlx5_glue->destroy_cq(rxq->cq));
2041         rte_free(rxq);
2042         priv->drop_queue.rxq = NULL;
2043 }
2044
2045 /**
2046  * Create a drop indirection table.
2047  *
2048  * @param dev
2049  *   Pointer to Ethernet device.
2050  *
2051  * @return
2052  *   The Verbs object initialised, NULL otherwise and rte_errno is set.
2053  */
2054 static struct mlx5_ind_table_ibv *
2055 mlx5_ind_table_ibv_drop_new(struct rte_eth_dev *dev)
2056 {
2057         struct mlx5_priv *priv = dev->data->dev_private;
2058         struct mlx5_ind_table_ibv *ind_tbl;
2059         struct mlx5_rxq_ibv *rxq;
2060         struct mlx5_ind_table_ibv tmpl;
2061
2062         rxq = mlx5_rxq_ibv_drop_new(dev);
2063         if (!rxq)
2064                 return NULL;
2065         tmpl.ind_table = mlx5_glue->create_rwq_ind_table
2066                 (priv->sh->ctx,
2067                  &(struct ibv_rwq_ind_table_init_attr){
2068                         .log_ind_tbl_size = 0,
2069                         .ind_tbl = &rxq->wq,
2070                         .comp_mask = 0,
2071                  });
2072         if (!tmpl.ind_table) {
2073                 DEBUG("port %u cannot allocate indirection table for drop"
2074                       " queue",
2075                       dev->data->port_id);
2076                 rte_errno = errno;
2077                 goto error;
2078         }
2079         ind_tbl = rte_calloc(__func__, 1, sizeof(*ind_tbl), 0);
2080         if (!ind_tbl) {
2081                 rte_errno = ENOMEM;
2082                 goto error;
2083         }
2084         ind_tbl->ind_table = tmpl.ind_table;
2085         return ind_tbl;
2086 error:
2087         mlx5_rxq_ibv_drop_release(dev);
2088         return NULL;
2089 }
2090
2091 /**
2092  * Release a drop indirection table.
2093  *
2094  * @param dev
2095  *   Pointer to Ethernet device.
2096  */
2097 static void
2098 mlx5_ind_table_ibv_drop_release(struct rte_eth_dev *dev)
2099 {
2100         struct mlx5_priv *priv = dev->data->dev_private;
2101         struct mlx5_ind_table_ibv *ind_tbl = priv->drop_queue.hrxq->ind_table;
2102
2103         claim_zero(mlx5_glue->destroy_rwq_ind_table(ind_tbl->ind_table));
2104         mlx5_rxq_ibv_drop_release(dev);
2105         rte_free(ind_tbl);
2106         priv->drop_queue.hrxq->ind_table = NULL;
2107 }
2108
2109 /**
2110  * Create a drop Rx Hash queue.
2111  *
2112  * @param dev
2113  *   Pointer to Ethernet device.
2114  *
2115  * @return
2116  *   The Verbs object initialised, NULL otherwise and rte_errno is set.
2117  */
2118 struct mlx5_hrxq *
2119 mlx5_hrxq_drop_new(struct rte_eth_dev *dev)
2120 {
2121         struct mlx5_priv *priv = dev->data->dev_private;
2122         struct mlx5_ind_table_ibv *ind_tbl;
2123         struct ibv_qp *qp;
2124         struct mlx5_hrxq *hrxq;
2125
2126         if (priv->drop_queue.hrxq) {
2127                 rte_atomic32_inc(&priv->drop_queue.hrxq->refcnt);
2128                 return priv->drop_queue.hrxq;
2129         }
2130         ind_tbl = mlx5_ind_table_ibv_drop_new(dev);
2131         if (!ind_tbl)
2132                 return NULL;
2133         qp = mlx5_glue->create_qp_ex(priv->sh->ctx,
2134                  &(struct ibv_qp_init_attr_ex){
2135                         .qp_type = IBV_QPT_RAW_PACKET,
2136                         .comp_mask =
2137                                 IBV_QP_INIT_ATTR_PD |
2138                                 IBV_QP_INIT_ATTR_IND_TABLE |
2139                                 IBV_QP_INIT_ATTR_RX_HASH,
2140                         .rx_hash_conf = (struct ibv_rx_hash_conf){
2141                                 .rx_hash_function =
2142                                         IBV_RX_HASH_FUNC_TOEPLITZ,
2143                                 .rx_hash_key_len = MLX5_RSS_HASH_KEY_LEN,
2144                                 .rx_hash_key = rss_hash_default_key,
2145                                 .rx_hash_fields_mask = 0,
2146                                 },
2147                         .rwq_ind_tbl = ind_tbl->ind_table,
2148                         .pd = priv->sh->pd
2149                  });
2150         if (!qp) {
2151                 DEBUG("port %u cannot allocate QP for drop queue",
2152                       dev->data->port_id);
2153                 rte_errno = errno;
2154                 goto error;
2155         }
2156         hrxq = rte_calloc(__func__, 1, sizeof(*hrxq), 0);
2157         if (!hrxq) {
2158                 DRV_LOG(WARNING,
2159                         "port %u cannot allocate memory for drop queue",
2160                         dev->data->port_id);
2161                 rte_errno = ENOMEM;
2162                 goto error;
2163         }
2164         hrxq->ind_table = ind_tbl;
2165         hrxq->qp = qp;
2166 #ifdef HAVE_IBV_FLOW_DV_SUPPORT
2167         hrxq->action = mlx5_glue->dv_create_flow_action_dest_ibv_qp(hrxq->qp);
2168         if (!hrxq->action) {
2169                 rte_errno = errno;
2170                 goto error;
2171         }
2172 #endif
2173         priv->drop_queue.hrxq = hrxq;
2174         rte_atomic32_set(&hrxq->refcnt, 1);
2175         return hrxq;
2176 error:
2177         if (ind_tbl)
2178                 mlx5_ind_table_ibv_drop_release(dev);
2179         return NULL;
2180 }
2181
2182 /**
2183  * Release a drop hash Rx queue.
2184  *
2185  * @param dev
2186  *   Pointer to Ethernet device.
2187  */
2188 void
2189 mlx5_hrxq_drop_release(struct rte_eth_dev *dev)
2190 {
2191         struct mlx5_priv *priv = dev->data->dev_private;
2192         struct mlx5_hrxq *hrxq = priv->drop_queue.hrxq;
2193
2194         if (rte_atomic32_dec_and_test(&hrxq->refcnt)) {
2195 #ifdef HAVE_IBV_FLOW_DV_SUPPORT
2196                 mlx5_glue->destroy_flow_action(hrxq->action);
2197 #endif
2198                 claim_zero(mlx5_glue->destroy_qp(hrxq->qp));
2199                 mlx5_ind_table_ibv_drop_release(dev);
2200                 rte_free(hrxq);
2201                 priv->drop_queue.hrxq = NULL;
2202         }
2203 }