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 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 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_ctrl->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_ctrl->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->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->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_ctrl->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_ctrl->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  * Clean up a RX queue.
 357  *
 358  * Destroy objects, free allocated memory and reset the structure for reuse.
 359  *
 360  * @param rxq_ctrl
 361  *   Pointer to RX queue structure.
 362  */
 363 void
 364 mlx5_rxq_cleanup(struct mlx5_rxq_ctrl *rxq_ctrl)
 365 {
 366         DRV_LOG(DEBUG, "port %u cleaning up Rx queue %u",
 367                 PORT_ID(rxq_ctrl->priv), rxq_ctrl->idx);
 368         if (rxq_ctrl->ibv)
 369                 mlx5_rxq_ibv_release(rxq_ctrl->ibv);
 370         memset(rxq_ctrl, 0, sizeof(*rxq_ctrl));
 371 }
 372
 373 /**
 374  * Returns the per-queue supported offloads.
 375  *
 376  * @param dev
 377  *   Pointer to Ethernet device.
 378  *
 379  * @return
 380  *   Supported Rx offloads.
 381  */
 382 uint64_t
 383 mlx5_get_rx_queue_offloads(struct rte_eth_dev *dev)
 384 {
 385         struct priv *priv = dev->data->dev_private;
 386         struct mlx5_dev_config *config = &priv->config;
 387         uint64_t offloads = (DEV_RX_OFFLOAD_SCATTER |
 388                              DEV_RX_OFFLOAD_TIMESTAMP |
 389                              DEV_RX_OFFLOAD_JUMBO_FRAME);
 390
 391         if (config->hw_fcs_strip)
 392                 offloads |= DEV_RX_OFFLOAD_KEEP_CRC;
 393
 394         if (config->hw_csum)
 395                 offloads |= (DEV_RX_OFFLOAD_IPV4_CKSUM |
 396                              DEV_RX_OFFLOAD_UDP_CKSUM |
 397                              DEV_RX_OFFLOAD_TCP_CKSUM);
 398         if (config->hw_vlan_strip)
 399                 offloads |= DEV_RX_OFFLOAD_VLAN_STRIP;
 400         return offloads;
 401 }
 402
 403
 404 /**
 405  * Returns the per-port supported offloads.
 406  *
 407  * @return
 408  *   Supported Rx offloads.
 409  */
 410 uint64_t
 411 mlx5_get_rx_port_offloads(void)
 412 {
 413         uint64_t offloads = DEV_RX_OFFLOAD_VLAN_FILTER;
 414
 415         return offloads;
 416 }
 417
 418 /**
 419  *
 420  * @param dev
 421  *   Pointer to Ethernet device structure.
 422  * @param idx
 423  *   RX queue index.
 424  * @param desc
 425  *   Number of descriptors to configure in queue.
 426  * @param socket
 427  *   NUMA socket on which memory must be allocated.
 428  * @param[in] conf
 429  *   Thresholds parameters.
 430  * @param mp
 431  *   Memory pool for buffer allocations.
 432  *
 433  * @return
 434  *   0 on success, a negative errno value otherwise and rte_errno is set.
 435  */
 436 int
 437 mlx5_rx_queue_setup(struct rte_eth_dev *dev, uint16_t idx, uint16_t desc,
 438                     unsigned int socket, const struct rte_eth_rxconf *conf,
 439                     struct rte_mempool *mp)
 440 {
 441         struct priv *priv = dev->data->dev_private;
 442         struct mlx5_rxq_data *rxq = (*priv->rxqs)[idx];
 443         struct mlx5_rxq_ctrl *rxq_ctrl =
 444                 container_of(rxq, struct mlx5_rxq_ctrl, rxq);
 445
 446         if (!rte_is_power_of_2(desc)) {
 447                 desc = 1 << log2above(desc);
 448                 DRV_LOG(WARNING,
 449                         "port %u increased number of descriptors in Rx queue %u"
 450                         " to the next power of two (%d)",
 451                         dev->data->port_id, idx, desc);
 452         }
 453         DRV_LOG(DEBUG, "port %u configuring Rx queue %u for %u descriptors",
 454                 dev->data->port_id, idx, desc);
 455         if (idx >= priv->rxqs_n) {
 456                 DRV_LOG(ERR, "port %u Rx queue index out of range (%u >= %u)",
 457                         dev->data->port_id, idx, priv->rxqs_n);
 458                 rte_errno = EOVERFLOW;
 459                 return -rte_errno;
 460         }
 461         if (!mlx5_rxq_releasable(dev, idx)) {
 462                 DRV_LOG(ERR, "port %u unable to release queue index %u",
 463                         dev->data->port_id, idx);
 464                 rte_errno = EBUSY;
 465                 return -rte_errno;
 466         }
 467         mlx5_rxq_release(dev, idx);
 468         rxq_ctrl = mlx5_rxq_new(dev, idx, desc, socket, conf, mp);
 469         if (!rxq_ctrl) {
 470                 DRV_LOG(ERR, "port %u unable to allocate queue index %u",
 471                         dev->data->port_id, idx);
 472                 rte_errno = ENOMEM;
 473                 return -rte_errno;
 474         }
 475         DRV_LOG(DEBUG, "port %u adding Rx queue %u to list",
 476                 dev->data->port_id, idx);
 477         (*priv->rxqs)[idx] = &rxq_ctrl->rxq;
 478         return 0;
 479 }
 480
 481 /**
 482  * DPDK callback to release a RX queue.
 483  *
 484  * @param dpdk_rxq
 485  *   Generic RX queue pointer.
 486  */
 487 void
 488 mlx5_rx_queue_release(void *dpdk_rxq)
 489 {
 490         struct mlx5_rxq_data *rxq = (struct mlx5_rxq_data *)dpdk_rxq;
 491         struct mlx5_rxq_ctrl *rxq_ctrl;
 492         struct priv *priv;
 493
 494         if (rxq == NULL)
 495                 return;
 496         rxq_ctrl = container_of(rxq, struct mlx5_rxq_ctrl, rxq);
 497         priv = rxq_ctrl->priv;
 498         if (!mlx5_rxq_releasable(ETH_DEV(priv), rxq_ctrl->rxq.stats.idx))
 499                 rte_panic("port %u Rx queue %u is still used by a flow and"
 500                           " cannot be removed\n",
 501                           PORT_ID(priv), rxq_ctrl->idx);
 502         mlx5_rxq_release(ETH_DEV(priv), rxq_ctrl->rxq.stats.idx);
 503 }
 504
 505 /**
 506  * Allocate queue vector and fill epoll fd list for Rx interrupts.
 507  *
 508  * @param dev
 509  *   Pointer to Ethernet device.
 510  *
 511  * @return
 512  *   0 on success, a negative errno value otherwise and rte_errno is set.
 513  */
 514 int
 515 mlx5_rx_intr_vec_enable(struct rte_eth_dev *dev)
 516 {
 517         struct priv *priv = dev->data->dev_private;
 518         unsigned int i;
 519         unsigned int rxqs_n = priv->rxqs_n;
 520         unsigned int n = RTE_MIN(rxqs_n, (uint32_t)RTE_MAX_RXTX_INTR_VEC_ID);
 521         unsigned int count = 0;
 522         struct rte_intr_handle *intr_handle = dev->intr_handle;
 523
 524         if (!dev->data->dev_conf.intr_conf.rxq)
 525                 return 0;
 526         mlx5_rx_intr_vec_disable(dev);
 527         intr_handle->intr_vec = malloc(n * sizeof(intr_handle->intr_vec[0]));
 528         if (intr_handle->intr_vec == NULL) {
 529                 DRV_LOG(ERR,
 530                         "port %u failed to allocate memory for interrupt"
 531                         " vector, Rx interrupts will not be supported",
 532                         dev->data->port_id);
 533                 rte_errno = ENOMEM;
 534                 return -rte_errno;
 535         }
 536         intr_handle->type = RTE_INTR_HANDLE_EXT;
 537         for (i = 0; i != n; ++i) {
 538                 /* This rxq ibv must not be released in this function. */
 539                 struct mlx5_rxq_ibv *rxq_ibv = mlx5_rxq_ibv_get(dev, i);
 540                 int fd;
 541                 int flags;
 542                 int rc;
 543
 544                 /* Skip queues that cannot request interrupts. */
 545                 if (!rxq_ibv || !rxq_ibv->channel) {
 546                         /* Use invalid intr_vec[] index to disable entry. */
 547                         intr_handle->intr_vec[i] =
 548                                 RTE_INTR_VEC_RXTX_OFFSET +
 549                                 RTE_MAX_RXTX_INTR_VEC_ID;
 550                         continue;
 551                 }
 552                 if (count >= RTE_MAX_RXTX_INTR_VEC_ID) {
 553                         DRV_LOG(ERR,
 554                                 "port %u too many Rx queues for interrupt"
 555                                 " vector size (%d), Rx interrupts cannot be"
 556                                 " enabled",
 557                                 dev->data->port_id, RTE_MAX_RXTX_INTR_VEC_ID);
 558                         mlx5_rx_intr_vec_disable(dev);
 559                         rte_errno = ENOMEM;
 560                         return -rte_errno;
 561                 }
 562                 fd = rxq_ibv->channel->fd;
 563                 flags = fcntl(fd, F_GETFL);
 564                 rc = fcntl(fd, F_SETFL, flags | O_NONBLOCK);
 565                 if (rc < 0) {
 566                         rte_errno = errno;
 567                         DRV_LOG(ERR,
 568                                 "port %u failed to make Rx interrupt file"
 569                                 " descriptor %d non-blocking for queue index"
 570                                 " %d",
 571                                 dev->data->port_id, fd, i);
 572                         mlx5_rx_intr_vec_disable(dev);
 573                         return -rte_errno;
 574                 }
 575                 intr_handle->intr_vec[i] = RTE_INTR_VEC_RXTX_OFFSET + count;
 576                 intr_handle->efds[count] = fd;
 577                 count++;
 578         }
 579         if (!count)
 580                 mlx5_rx_intr_vec_disable(dev);
 581         else
 582                 intr_handle->nb_efd = count;
 583         return 0;
 584 }
 585
 586 /**
 587  * Clean up Rx interrupts handler.
 588  *
 589  * @param dev
 590  *   Pointer to Ethernet device.
 591  */
 592 void
 593 mlx5_rx_intr_vec_disable(struct rte_eth_dev *dev)
 594 {
 595         struct priv *priv = dev->data->dev_private;
 596         struct rte_intr_handle *intr_handle = dev->intr_handle;
 597         unsigned int i;
 598         unsigned int rxqs_n = priv->rxqs_n;
 599         unsigned int n = RTE_MIN(rxqs_n, (uint32_t)RTE_MAX_RXTX_INTR_VEC_ID);
 600
 601         if (!dev->data->dev_conf.intr_conf.rxq)
 602                 return;
 603         if (!intr_handle->intr_vec)
 604                 goto free;
 605         for (i = 0; i != n; ++i) {
 606                 struct mlx5_rxq_ctrl *rxq_ctrl;
 607                 struct mlx5_rxq_data *rxq_data;
 608
 609                 if (intr_handle->intr_vec[i] == RTE_INTR_VEC_RXTX_OFFSET +
 610                     RTE_MAX_RXTX_INTR_VEC_ID)
 611                         continue;
 612                 /**
 613                  * Need to access directly the queue to release the reference
 614                  * kept in priv_rx_intr_vec_enable().
 615                  */
 616                 rxq_data = (*priv->rxqs)[i];
 617                 rxq_ctrl = container_of(rxq_data, struct mlx5_rxq_ctrl, rxq);
 618                 mlx5_rxq_ibv_release(rxq_ctrl->ibv);
 619         }
 620 free:
 621         rte_intr_free_epoll_fd(intr_handle);
 622         if (intr_handle->intr_vec)
 623                 free(intr_handle->intr_vec);
 624         intr_handle->nb_efd = 0;
 625         intr_handle->intr_vec = NULL;
 626 }
 627
 628 /**
 629  *  MLX5 CQ notification .
 630  *
 631  *  @param rxq
 632  *     Pointer to receive queue structure.
 633  *  @param sq_n_rxq
 634  *     Sequence number per receive queue .
 635  */
 636 static inline void
 637 mlx5_arm_cq(struct mlx5_rxq_data *rxq, int sq_n_rxq)
 638 {
 639         int sq_n = 0;
 640         uint32_t doorbell_hi;
 641         uint64_t doorbell;
 642         void *cq_db_reg = (char *)rxq->cq_uar + MLX5_CQ_DOORBELL;
 643
 644         sq_n = sq_n_rxq & MLX5_CQ_SQN_MASK;
 645         doorbell_hi = sq_n << MLX5_CQ_SQN_OFFSET | (rxq->cq_ci & MLX5_CI_MASK);
 646         doorbell = (uint64_t)doorbell_hi << 32;
 647         doorbell |=  rxq->cqn;
 648         rxq->cq_db[MLX5_CQ_ARM_DB] = rte_cpu_to_be_32(doorbell_hi);
 649         mlx5_uar_write64(rte_cpu_to_be_64(doorbell),
 650                          cq_db_reg, rxq->uar_lock_cq);
 651 }
 652
 653 /**
 654  * DPDK callback for Rx queue interrupt enable.
 655  *
 656  * @param dev
 657  *   Pointer to Ethernet device structure.
 658  * @param rx_queue_id
 659  *   Rx queue number.
 660  *
 661  * @return
 662  *   0 on success, a negative errno value otherwise and rte_errno is set.
 663  */
 664 int
 665 mlx5_rx_intr_enable(struct rte_eth_dev *dev, uint16_t rx_queue_id)
 666 {
 667         struct priv *priv = dev->data->dev_private;
 668         struct mlx5_rxq_data *rxq_data;
 669         struct mlx5_rxq_ctrl *rxq_ctrl;
 670
 671         rxq_data = (*priv->rxqs)[rx_queue_id];
 672         if (!rxq_data) {
 673                 rte_errno = EINVAL;
 674                 return -rte_errno;
 675         }
 676         rxq_ctrl = container_of(rxq_data, struct mlx5_rxq_ctrl, rxq);
 677         if (rxq_ctrl->irq) {
 678                 struct mlx5_rxq_ibv *rxq_ibv;
 679
 680                 rxq_ibv = mlx5_rxq_ibv_get(dev, rx_queue_id);
 681                 if (!rxq_ibv) {
 682                         rte_errno = EINVAL;
 683                         return -rte_errno;
 684                 }
 685                 mlx5_arm_cq(rxq_data, rxq_data->cq_arm_sn);
 686                 mlx5_rxq_ibv_release(rxq_ibv);
 687         }
 688         return 0;
 689 }
 690
 691 /**
 692  * DPDK callback for Rx queue interrupt disable.
 693  *
 694  * @param dev
 695  *   Pointer to Ethernet device structure.
 696  * @param rx_queue_id
 697  *   Rx queue number.
 698  *
 699  * @return
 700  *   0 on success, a negative errno value otherwise and rte_errno is set.
 701  */
 702 int
 703 mlx5_rx_intr_disable(struct rte_eth_dev *dev, uint16_t rx_queue_id)
 704 {
 705         struct priv *priv = dev->data->dev_private;
 706         struct mlx5_rxq_data *rxq_data;
 707         struct mlx5_rxq_ctrl *rxq_ctrl;
 708         struct mlx5_rxq_ibv *rxq_ibv = NULL;
 709         struct ibv_cq *ev_cq;
 710         void *ev_ctx;
 711         int ret;
 712
 713         rxq_data = (*priv->rxqs)[rx_queue_id];
 714         if (!rxq_data) {
 715                 rte_errno = EINVAL;
 716                 return -rte_errno;
 717         }
 718         rxq_ctrl = container_of(rxq_data, struct mlx5_rxq_ctrl, rxq);
 719         if (!rxq_ctrl->irq)
 720                 return 0;
 721         rxq_ibv = mlx5_rxq_ibv_get(dev, rx_queue_id);
 722         if (!rxq_ibv) {
 723                 rte_errno = EINVAL;
 724                 return -rte_errno;
 725         }
 726         ret = mlx5_glue->get_cq_event(rxq_ibv->channel, &ev_cq, &ev_ctx);
 727         if (ret || ev_cq != rxq_ibv->cq) {
 728                 rte_errno = EINVAL;
 729                 goto exit;
 730         }
 731         rxq_data->cq_arm_sn++;
 732         mlx5_glue->ack_cq_events(rxq_ibv->cq, 1);
 733         return 0;
 734 exit:
 735         ret = rte_errno; /* Save rte_errno before cleanup. */
 736         if (rxq_ibv)
 737                 mlx5_rxq_ibv_release(rxq_ibv);
 738         DRV_LOG(WARNING, "port %u unable to disable interrupt on Rx queue %d",
 739                 dev->data->port_id, rx_queue_id);
 740         rte_errno = ret; /* Restore rte_errno. */
 741         return -rte_errno;
 742 }
 743
 744 /**
 745  * Create the Rx queue Verbs object.
 746  *
 747  * @param dev
 748  *   Pointer to Ethernet device.
 749  * @param idx
 750  *   Queue index in DPDK Rx queue array
 751  *
 752  * @return
 753  *   The Verbs object initialised, NULL otherwise and rte_errno is set.
 754  */
 755 struct mlx5_rxq_ibv *
 756 mlx5_rxq_ibv_new(struct rte_eth_dev *dev, uint16_t idx)
 757 {
 758         struct priv *priv = dev->data->dev_private;
 759         struct mlx5_rxq_data *rxq_data = (*priv->rxqs)[idx];
 760         struct mlx5_rxq_ctrl *rxq_ctrl =
 761                 container_of(rxq_data, struct mlx5_rxq_ctrl, rxq);
 762         struct ibv_wq_attr mod;
 763         union {
 764                 struct {
 765                         struct ibv_cq_init_attr_ex ibv;
 766                         struct mlx5dv_cq_init_attr mlx5;
 767                 } cq;
 768                 struct {
 769                         struct ibv_wq_init_attr ibv;
 770 #ifdef HAVE_IBV_DEVICE_STRIDING_RQ_SUPPORT
 771                         struct mlx5dv_wq_init_attr mlx5;
 772 #endif
 773                 } wq;
 774                 struct ibv_cq_ex cq_attr;
 775         } attr;
 776         unsigned int cqe_n;
 777         unsigned int wqe_n = 1 << rxq_data->elts_n;
 778         struct mlx5_rxq_ibv *tmpl;
 779         struct mlx5dv_cq cq_info;
 780         struct mlx5dv_rwq rwq;
 781         unsigned int i;
 782         int ret = 0;
 783         struct mlx5dv_obj obj;
 784         struct mlx5_dev_config *config = &priv->config;
 785         const int mprq_en = mlx5_rxq_mprq_enabled(rxq_data);
 786
 787         assert(rxq_data);
 788         assert(!rxq_ctrl->ibv);
 789         priv->verbs_alloc_ctx.type = MLX5_VERBS_ALLOC_TYPE_RX_QUEUE;
 790         priv->verbs_alloc_ctx.obj = rxq_ctrl;
 791         tmpl = rte_calloc_socket(__func__, 1, sizeof(*tmpl), 0,
 792                                  rxq_ctrl->socket);
 793         if (!tmpl) {
 794                 DRV_LOG(ERR,
 795                         "port %u Rx queue %u cannot allocate verbs resources",
 796                         dev->data->port_id, rxq_ctrl->idx);
 797                 rte_errno = ENOMEM;
 798                 goto error;
 799         }
 800         tmpl->rxq_ctrl = rxq_ctrl;
 801         if (rxq_ctrl->irq) {
 802                 tmpl->channel = mlx5_glue->create_comp_channel(priv->ctx);
 803                 if (!tmpl->channel) {
 804                         DRV_LOG(ERR, "port %u: comp channel creation failure",
 805                                 dev->data->port_id);
 806                         rte_errno = ENOMEM;
 807                         goto error;
 808                 }
 809         }
 810         if (mprq_en)
 811                 cqe_n = wqe_n * (1 << rxq_data->strd_num_n) - 1;
 812         else
 813                 cqe_n = wqe_n  - 1;
 814         attr.cq.ibv = (struct ibv_cq_init_attr_ex){
 815                 .cqe = cqe_n,
 816                 .channel = tmpl->channel,
 817                 .comp_mask = 0,
 818         };
 819         attr.cq.mlx5 = (struct mlx5dv_cq_init_attr){
 820                 .comp_mask = 0,
 821         };
 822         if (config->cqe_comp && !rxq_data->hw_timestamp) {
 823                 attr.cq.mlx5.comp_mask |=
 824                         MLX5DV_CQ_INIT_ATTR_MASK_COMPRESSED_CQE;
 825 #ifdef HAVE_IBV_DEVICE_STRIDING_RQ_SUPPORT
 826                 attr.cq.mlx5.cqe_comp_res_format =
 827                         mprq_en ? MLX5DV_CQE_RES_FORMAT_CSUM_STRIDX :
 828                                   MLX5DV_CQE_RES_FORMAT_HASH;
 829 #else
 830                 attr.cq.mlx5.cqe_comp_res_format = MLX5DV_CQE_RES_FORMAT_HASH;
 831 #endif
 832                 /*
 833                  * For vectorized Rx, it must not be doubled in order to
 834                  * make cq_ci and rq_ci aligned.
 835                  */
 836                 if (mlx5_rxq_check_vec_support(rxq_data) < 0)
 837                         attr.cq.ibv.cqe *= 2;
 838         } else if (config->cqe_comp && rxq_data->hw_timestamp) {
 839                 DRV_LOG(DEBUG,
 840                         "port %u Rx CQE compression is disabled for HW"
 841                         " timestamp",
 842                         dev->data->port_id);
 843         }
 844 #ifdef HAVE_IBV_MLX5_MOD_CQE_128B_PAD
 845         if (config->cqe_pad) {
 846                 attr.cq.mlx5.comp_mask |= MLX5DV_CQ_INIT_ATTR_MASK_FLAGS;
 847                 attr.cq.mlx5.flags |= MLX5DV_CQ_INIT_ATTR_FLAGS_CQE_PAD;
 848         }
 849 #endif
 850         tmpl->cq = mlx5_glue->cq_ex_to_cq
 851                 (mlx5_glue->dv_create_cq(priv->ctx, &attr.cq.ibv,
 852                                          &attr.cq.mlx5));
 853         if (tmpl->cq == NULL) {
 854                 DRV_LOG(ERR, "port %u Rx queue %u CQ creation failure",
 855                         dev->data->port_id, idx);
 856                 rte_errno = ENOMEM;
 857                 goto error;
 858         }
 859         DRV_LOG(DEBUG, "port %u priv->device_attr.max_qp_wr is %d",
 860                 dev->data->port_id, priv->device_attr.orig_attr.max_qp_wr);
 861         DRV_LOG(DEBUG, "port %u priv->device_attr.max_sge is %d",
 862                 dev->data->port_id, priv->device_attr.orig_attr.max_sge);
 863         attr.wq.ibv = (struct ibv_wq_init_attr){
 864                 .wq_context = NULL, /* Could be useful in the future. */
 865                 .wq_type = IBV_WQT_RQ,
 866                 /* Max number of outstanding WRs. */
 867                 .max_wr = wqe_n >> rxq_data->sges_n,
 868                 /* Max number of scatter/gather elements in a WR. */
 869                 .max_sge = 1 << rxq_data->sges_n,
 870                 .pd = priv->pd,
 871                 .cq = tmpl->cq,
 872                 .comp_mask =
 873                         IBV_WQ_FLAGS_CVLAN_STRIPPING |
 874                         0,
 875                 .create_flags = (rxq_data->vlan_strip ?
 876                                  IBV_WQ_FLAGS_CVLAN_STRIPPING :
 877                                  0),
 878         };
 879         /* By default, FCS (CRC) is stripped by hardware. */
 880         if (rxq_data->crc_present) {
 881                 attr.wq.ibv.create_flags |= IBV_WQ_FLAGS_SCATTER_FCS;
 882                 attr.wq.ibv.comp_mask |= IBV_WQ_INIT_ATTR_FLAGS;
 883         }
 884         if (config->hw_padding) {
 885 #if defined(HAVE_IBV_WQ_FLAG_RX_END_PADDING)
 886                 attr.wq.ibv.create_flags |= IBV_WQ_FLAG_RX_END_PADDING;
 887                 attr.wq.ibv.comp_mask |= IBV_WQ_INIT_ATTR_FLAGS;
 888 #elif defined(HAVE_IBV_WQ_FLAGS_PCI_WRITE_END_PADDING)
 889                 attr.wq.ibv.create_flags |= IBV_WQ_FLAGS_PCI_WRITE_END_PADDING;
 890                 attr.wq.ibv.comp_mask |= IBV_WQ_INIT_ATTR_FLAGS;
 891 #endif
 892         }
 893 #ifdef HAVE_IBV_DEVICE_STRIDING_RQ_SUPPORT
 894         attr.wq.mlx5 = (struct mlx5dv_wq_init_attr){
 895                 .comp_mask = 0,
 896         };
 897         if (mprq_en) {
 898                 struct mlx5dv_striding_rq_init_attr *mprq_attr =
 899                         &attr.wq.mlx5.striding_rq_attrs;
 900
 901                 attr.wq.mlx5.comp_mask |= MLX5DV_WQ_INIT_ATTR_MASK_STRIDING_RQ;
 902                 *mprq_attr = (struct mlx5dv_striding_rq_init_attr){
 903                         .single_stride_log_num_of_bytes = rxq_data->strd_sz_n,
 904                         .single_wqe_log_num_of_strides = rxq_data->strd_num_n,
 905                         .two_byte_shift_en = MLX5_MPRQ_TWO_BYTE_SHIFT,
 906                 };
 907         }
 908         tmpl->wq = mlx5_glue->dv_create_wq(priv->ctx, &attr.wq.ibv,
 909                                            &attr.wq.mlx5);
 910 #else
 911         tmpl->wq = mlx5_glue->create_wq(priv->ctx, &attr.wq.ibv);
 912 #endif
 913         if (tmpl->wq == NULL) {
 914                 DRV_LOG(ERR, "port %u Rx queue %u WQ creation failure",
 915                         dev->data->port_id, idx);
 916                 rte_errno = ENOMEM;
 917                 goto error;
 918         }
 919         /*
 920          * Make sure number of WRs*SGEs match expectations since a queue
 921          * cannot allocate more than "desc" buffers.
 922          */
 923         if (attr.wq.ibv.max_wr != (wqe_n >> rxq_data->sges_n) ||
 924             attr.wq.ibv.max_sge != (1u << rxq_data->sges_n)) {
 925                 DRV_LOG(ERR,
 926                         "port %u Rx queue %u requested %u*%u but got %u*%u"
 927                         " WRs*SGEs",
 928                         dev->data->port_id, idx,
 929                         wqe_n >> rxq_data->sges_n, (1 << rxq_data->sges_n),
 930                         attr.wq.ibv.max_wr, attr.wq.ibv.max_sge);
 931                 rte_errno = EINVAL;
 932                 goto error;
 933         }
 934         /* Change queue state to ready. */
 935         mod = (struct ibv_wq_attr){
 936                 .attr_mask = IBV_WQ_ATTR_STATE,
 937                 .wq_state = IBV_WQS_RDY,
 938         };
 939         ret = mlx5_glue->modify_wq(tmpl->wq, &mod);
 940         if (ret) {
 941                 DRV_LOG(ERR,
 942                         "port %u Rx queue %u WQ state to IBV_WQS_RDY failed",
 943                         dev->data->port_id, idx);
 944                 rte_errno = ret;
 945                 goto error;
 946         }
 947         obj.cq.in = tmpl->cq;
 948         obj.cq.out = &cq_info;
 949         obj.rwq.in = tmpl->wq;
 950         obj.rwq.out = &rwq;
 951         ret = mlx5_glue->dv_init_obj(&obj, MLX5DV_OBJ_CQ | MLX5DV_OBJ_RWQ);
 952         if (ret) {
 953                 rte_errno = ret;
 954                 goto error;
 955         }
 956         if (cq_info.cqe_size != RTE_CACHE_LINE_SIZE) {
 957                 DRV_LOG(ERR,
 958                         "port %u wrong MLX5_CQE_SIZE environment variable"
 959                         " value: it should be set to %u",
 960                         dev->data->port_id, RTE_CACHE_LINE_SIZE);
 961                 rte_errno = EINVAL;
 962                 goto error;
 963         }
 964         /* Fill the rings. */
 965         rxq_data->wqes = rwq.buf;
 966         for (i = 0; (i != wqe_n); ++i) {
 967                 volatile struct mlx5_wqe_data_seg *scat;
 968                 uintptr_t addr;
 969                 uint32_t byte_count;
 970
 971                 if (mprq_en) {
 972                         struct mlx5_mprq_buf *buf = (*rxq_data->mprq_bufs)[i];
 973
 974                         scat = &((volatile struct mlx5_wqe_mprq *)
 975                                  rxq_data->wqes)[i].dseg;
 976                         addr = (uintptr_t)mlx5_mprq_buf_addr(buf);
 977                         byte_count = (1 << rxq_data->strd_sz_n) *
 978                                      (1 << rxq_data->strd_num_n);
 979                 } else {
 980                         struct rte_mbuf *buf = (*rxq_data->elts)[i];
 981
 982                         scat = &((volatile struct mlx5_wqe_data_seg *)
 983                                  rxq_data->wqes)[i];
 984                         addr = rte_pktmbuf_mtod(buf, uintptr_t);
 985                         byte_count = DATA_LEN(buf);
 986                 }
 987                 /* scat->addr must be able to store a pointer. */
 988                 assert(sizeof(scat->addr) >= sizeof(uintptr_t));
 989                 *scat = (struct mlx5_wqe_data_seg){
 990                         .addr = rte_cpu_to_be_64(addr),
 991                         .byte_count = rte_cpu_to_be_32(byte_count),
 992                         .lkey = mlx5_rx_addr2mr(rxq_data, addr),
 993                 };
 994         }
 995         rxq_data->rq_db = rwq.dbrec;
 996         rxq_data->cqe_n = log2above(cq_info.cqe_cnt);
 997         rxq_data->cq_ci = 0;
 998         rxq_data->consumed_strd = 0;
 999         rxq_data->rq_pi = 0;
1000         rxq_data->zip = (struct rxq_zip){
1001                 .ai = 0,
1002         };
1003         rxq_data->cq_db = cq_info.dbrec;
1004         rxq_data->cqes = (volatile struct mlx5_cqe (*)[])(uintptr_t)cq_info.buf;
1005         rxq_data->cq_uar = cq_info.cq_uar;
1006         rxq_data->cqn = cq_info.cqn;
1007         rxq_data->cq_arm_sn = 0;
1008         /* Update doorbell counter. */
1009         rxq_data->rq_ci = wqe_n >> rxq_data->sges_n;
1010         rte_wmb();
1011         *rxq_data->rq_db = rte_cpu_to_be_32(rxq_data->rq_ci);
1012         DRV_LOG(DEBUG, "port %u rxq %u updated with %p", dev->data->port_id,
1013                 idx, (void *)&tmpl);
1014         rte_atomic32_inc(&tmpl->refcnt);
1015         LIST_INSERT_HEAD(&priv->rxqsibv, tmpl, next);
1016         priv->verbs_alloc_ctx.type = MLX5_VERBS_ALLOC_TYPE_NONE;
1017         return tmpl;
1018 error:
1019         ret = rte_errno; /* Save rte_errno before cleanup. */
1020         if (tmpl->wq)
1021                 claim_zero(mlx5_glue->destroy_wq(tmpl->wq));
1022         if (tmpl->cq)
1023                 claim_zero(mlx5_glue->destroy_cq(tmpl->cq));
1024         if (tmpl->channel)
1025                 claim_zero(mlx5_glue->destroy_comp_channel(tmpl->channel));
1026         priv->verbs_alloc_ctx.type = MLX5_VERBS_ALLOC_TYPE_NONE;
1027         rte_errno = ret; /* Restore rte_errno. */
1028         return NULL;
1029 }
1030
1031 /**
1032  * Get an Rx queue Verbs object.
1033  *
1034  * @param dev
1035  *   Pointer to Ethernet device.
1036  * @param idx
1037  *   Queue index in DPDK Rx queue array
1038  *
1039  * @return
1040  *   The Verbs object if it exists.
1041  */
1042 struct mlx5_rxq_ibv *
1043 mlx5_rxq_ibv_get(struct rte_eth_dev *dev, uint16_t idx)
1044 {
1045         struct priv *priv = dev->data->dev_private;
1046         struct mlx5_rxq_data *rxq_data = (*priv->rxqs)[idx];
1047         struct mlx5_rxq_ctrl *rxq_ctrl;
1048
1049         if (idx >= priv->rxqs_n)
1050                 return NULL;
1051         if (!rxq_data)
1052                 return NULL;
1053         rxq_ctrl = container_of(rxq_data, struct mlx5_rxq_ctrl, rxq);
1054         if (rxq_ctrl->ibv) {
1055                 rte_atomic32_inc(&rxq_ctrl->ibv->refcnt);
1056         }
1057         return rxq_ctrl->ibv;
1058 }
1059
1060 /**
1061  * Release an Rx verbs queue object.
1062  *
1063  * @param rxq_ibv
1064  *   Verbs Rx queue object.
1065  *
1066  * @return
1067  *   1 while a reference on it exists, 0 when freed.
1068  */
1069 int
1070 mlx5_rxq_ibv_release(struct mlx5_rxq_ibv *rxq_ibv)
1071 {
1072         assert(rxq_ibv);
1073         assert(rxq_ibv->wq);
1074         assert(rxq_ibv->cq);
1075         if (rte_atomic32_dec_and_test(&rxq_ibv->refcnt)) {
1076                 rxq_free_elts(rxq_ibv->rxq_ctrl);
1077                 claim_zero(mlx5_glue->destroy_wq(rxq_ibv->wq));
1078                 claim_zero(mlx5_glue->destroy_cq(rxq_ibv->cq));
1079                 if (rxq_ibv->channel)
1080                         claim_zero(mlx5_glue->destroy_comp_channel
1081                                    (rxq_ibv->channel));
1082                 LIST_REMOVE(rxq_ibv, next);
1083                 rte_free(rxq_ibv);
1084                 return 0;
1085         }
1086         return 1;
1087 }
1088
1089 /**
1090  * Verify the Verbs Rx queue list is empty
1091  *
1092  * @param dev
1093  *   Pointer to Ethernet device.
1094  *
1095  * @return
1096  *   The number of object not released.
1097  */
1098 int
1099 mlx5_rxq_ibv_verify(struct rte_eth_dev *dev)
1100 {
1101         struct priv *priv = dev->data->dev_private;
1102         int ret = 0;
1103         struct mlx5_rxq_ibv *rxq_ibv;
1104
1105         LIST_FOREACH(rxq_ibv, &priv->rxqsibv, next) {
1106                 DRV_LOG(DEBUG, "port %u Verbs Rx queue %u still referenced",
1107                         dev->data->port_id, rxq_ibv->rxq_ctrl->idx);
1108                 ++ret;
1109         }
1110         return ret;
1111 }
1112
1113 /**
1114  * Return true if a single reference exists on the object.
1115  *
1116  * @param rxq_ibv
1117  *   Verbs Rx queue object.
1118  */
1119 int
1120 mlx5_rxq_ibv_releasable(struct mlx5_rxq_ibv *rxq_ibv)
1121 {
1122         assert(rxq_ibv);
1123         return (rte_atomic32_read(&rxq_ibv->refcnt) == 1);
1124 }
1125
1126 /**
1127  * Callback function to initialize mbufs for Multi-Packet RQ.
1128  */
1129 static inline void
1130 mlx5_mprq_buf_init(struct rte_mempool *mp, void *opaque_arg __rte_unused,
1131                     void *_m, unsigned int i __rte_unused)
1132 {
1133         struct mlx5_mprq_buf *buf = _m;
1134
1135         memset(_m, 0, sizeof(*buf));
1136         buf->mp = mp;
1137         rte_atomic16_set(&buf->refcnt, 1);
1138 }
1139
1140 /**
1141  * Free mempool of Multi-Packet RQ.
1142  *
1143  * @param dev
1144  *   Pointer to Ethernet device.
1145  *
1146  * @return
1147  *   0 on success, negative errno value on failure.
1148  */
1149 int
1150 mlx5_mprq_free_mp(struct rte_eth_dev *dev)
1151 {
1152         struct priv *priv = dev->data->dev_private;
1153         struct rte_mempool *mp = priv->mprq_mp;
1154         unsigned int i;
1155
1156         if (mp == NULL)
1157                 return 0;
1158         DRV_LOG(DEBUG, "port %u freeing mempool (%s) for Multi-Packet RQ",
1159                 dev->data->port_id, mp->name);
1160         /*
1161          * If a buffer in the pool has been externally attached to a mbuf and it
1162          * is still in use by application, destroying the Rx qeueue can spoil
1163          * the packet. It is unlikely to happen but if application dynamically
1164          * creates and destroys with holding Rx packets, this can happen.
1165          *
1166          * TODO: It is unavoidable for now because the mempool for Multi-Packet
1167          * RQ isn't provided by application but managed by PMD.
1168          */
1169         if (!rte_mempool_full(mp)) {
1170                 DRV_LOG(ERR,
1171                         "port %u mempool for Multi-Packet RQ is still in use",
1172                         dev->data->port_id);
1173                 rte_errno = EBUSY;
1174                 return -rte_errno;
1175         }
1176         rte_mempool_free(mp);
1177         /* Unset mempool for each Rx queue. */
1178         for (i = 0; i != priv->rxqs_n; ++i) {
1179                 struct mlx5_rxq_data *rxq = (*priv->rxqs)[i];
1180
1181                 if (rxq == NULL)
1182                         continue;
1183                 rxq->mprq_mp = NULL;
1184         }
1185         priv->mprq_mp = NULL;
1186         return 0;
1187 }
1188
1189 /**
1190  * Allocate a mempool for Multi-Packet RQ. All configured Rx queues share the
1191  * mempool. If already allocated, reuse it if there're enough elements.
1192  * Otherwise, resize it.
1193  *
1194  * @param dev
1195  *   Pointer to Ethernet device.
1196  *
1197  * @return
1198  *   0 on success, negative errno value on failure.
1199  */
1200 int
1201 mlx5_mprq_alloc_mp(struct rte_eth_dev *dev)
1202 {
1203         struct priv *priv = dev->data->dev_private;
1204         struct rte_mempool *mp = priv->mprq_mp;
1205         char name[RTE_MEMPOOL_NAMESIZE];
1206         unsigned int desc = 0;
1207         unsigned int buf_len;
1208         unsigned int obj_num;
1209         unsigned int obj_size;
1210         unsigned int strd_num_n = 0;
1211         unsigned int strd_sz_n = 0;
1212         unsigned int i;
1213
1214         if (!mlx5_mprq_enabled(dev))
1215                 return 0;
1216         /* Count the total number of descriptors configured. */
1217         for (i = 0; i != priv->rxqs_n; ++i) {
1218                 struct mlx5_rxq_data *rxq = (*priv->rxqs)[i];
1219
1220                 if (rxq == NULL)
1221                         continue;
1222                 desc += 1 << rxq->elts_n;
1223                 /* Get the max number of strides. */
1224                 if (strd_num_n < rxq->strd_num_n)
1225                         strd_num_n = rxq->strd_num_n;
1226                 /* Get the max size of a stride. */
1227                 if (strd_sz_n < rxq->strd_sz_n)
1228                         strd_sz_n = rxq->strd_sz_n;
1229         }
1230         assert(strd_num_n && strd_sz_n);
1231         buf_len = (1 << strd_num_n) * (1 << strd_sz_n);
1232         obj_size = buf_len + sizeof(struct mlx5_mprq_buf);
1233         /*
1234          * Received packets can be either memcpy'd or externally referenced. In
1235          * case that the packet is attached to an mbuf as an external buffer, as
1236          * it isn't possible to predict how the buffers will be queued by
1237          * application, there's no option to exactly pre-allocate needed buffers
1238          * in advance but to speculatively prepares enough buffers.
1239          *
1240          * In the data path, if this Mempool is depleted, PMD will try to memcpy
1241          * received packets to buffers provided by application (rxq->mp) until
1242          * this Mempool gets available again.
1243          */
1244         desc *= 4;
1245         obj_num = desc + MLX5_MPRQ_MP_CACHE_SZ * priv->rxqs_n;
1246         /*
1247          * rte_mempool_create_empty() has sanity check to refuse large cache
1248          * size compared to the number of elements.
1249          * CACHE_FLUSHTHRESH_MULTIPLIER is defined in a C file, so using a
1250          * constant number 2 instead.
1251          */
1252         obj_num = RTE_MAX(obj_num, MLX5_MPRQ_MP_CACHE_SZ * 2);
1253         /* Check a mempool is already allocated and if it can be resued. */
1254         if (mp != NULL && mp->elt_size >= obj_size && mp->size >= obj_num) {
1255                 DRV_LOG(DEBUG, "port %u mempool %s is being reused",
1256                         dev->data->port_id, mp->name);
1257                 /* Reuse. */
1258                 goto exit;
1259         } else if (mp != NULL) {
1260                 DRV_LOG(DEBUG, "port %u mempool %s should be resized, freeing it",
1261                         dev->data->port_id, mp->name);
1262                 /*
1263                  * If failed to free, which means it may be still in use, no way
1264                  * but to keep using the existing one. On buffer underrun,
1265                  * packets will be memcpy'd instead of external buffer
1266                  * attachment.
1267                  */
1268                 if (mlx5_mprq_free_mp(dev)) {
1269                         if (mp->elt_size >= obj_size)
1270                                 goto exit;
1271                         else
1272                                 return -rte_errno;
1273                 }
1274         }
1275         snprintf(name, sizeof(name), "%s-mprq", dev->device->name);
1276         mp = rte_mempool_create(name, obj_num, obj_size, MLX5_MPRQ_MP_CACHE_SZ,
1277                                 0, NULL, NULL, mlx5_mprq_buf_init, NULL,
1278                                 dev->device->numa_node, 0);
1279         if (mp == NULL) {
1280                 DRV_LOG(ERR,
1281                         "port %u failed to allocate a mempool for"
1282                         " Multi-Packet RQ, count=%u, size=%u",
1283                         dev->data->port_id, obj_num, obj_size);
1284                 rte_errno = ENOMEM;
1285                 return -rte_errno;
1286         }
1287         priv->mprq_mp = mp;
1288 exit:
1289         /* Set mempool for each Rx queue. */
1290         for (i = 0; i != priv->rxqs_n; ++i) {
1291                 struct mlx5_rxq_data *rxq = (*priv->rxqs)[i];
1292
1293                 if (rxq == NULL)
1294                         continue;
1295                 rxq->mprq_mp = mp;
1296         }
1297         DRV_LOG(INFO, "port %u Multi-Packet RQ is configured",
1298                 dev->data->port_id);
1299         return 0;
1300 }
1301
1302 /**
1303  * Create a DPDK Rx queue.
1304  *
1305  * @param dev
1306  *   Pointer to Ethernet device.
1307  * @param idx
1308  *   RX queue index.
1309  * @param desc
1310  *   Number of descriptors to configure in queue.
1311  * @param socket
1312  *   NUMA socket on which memory must be allocated.
1313  *
1314  * @return
1315  *   A DPDK queue object on success, NULL otherwise and rte_errno is set.
1316  */
1317 struct mlx5_rxq_ctrl *
1318 mlx5_rxq_new(struct rte_eth_dev *dev, uint16_t idx, uint16_t desc,
1319              unsigned int socket, const struct rte_eth_rxconf *conf,
1320              struct rte_mempool *mp)
1321 {
1322         struct priv *priv = dev->data->dev_private;
1323         struct mlx5_rxq_ctrl *tmpl;
1324         unsigned int mb_len = rte_pktmbuf_data_room_size(mp);
1325         unsigned int mprq_stride_size;
1326         struct mlx5_dev_config *config = &priv->config;
1327         /*
1328          * Always allocate extra slots, even if eventually
1329          * the vector Rx will not be used.
1330          */
1331         uint16_t desc_n =
1332                 desc + config->rx_vec_en * MLX5_VPMD_DESCS_PER_LOOP;
1333         uint64_t offloads = conf->offloads |
1334                            dev->data->dev_conf.rxmode.offloads;
1335         const int mprq_en = mlx5_check_mprq_support(dev) > 0;
1336
1337         tmpl = rte_calloc_socket("RXQ", 1,
1338                                  sizeof(*tmpl) +
1339                                  desc_n * sizeof(struct rte_mbuf *),
1340                                  0, socket);
1341         if (!tmpl) {
1342                 rte_errno = ENOMEM;
1343                 return NULL;
1344         }
1345         if (mlx5_mr_btree_init(&tmpl->rxq.mr_ctrl.cache_bh,
1346                                MLX5_MR_BTREE_CACHE_N, socket)) {
1347                 /* rte_errno is already set. */
1348                 goto error;
1349         }
1350         tmpl->socket = socket;
1351         if (dev->data->dev_conf.intr_conf.rxq)
1352                 tmpl->irq = 1;
1353         /*
1354          * This Rx queue can be configured as a Multi-Packet RQ if all of the
1355          * following conditions are met:
1356          *  - MPRQ is enabled.
1357          *  - The number of descs is more than the number of strides.
1358          *  - max_rx_pkt_len plus overhead is less than the max size of a
1359          *    stride.
1360          *  Otherwise, enable Rx scatter if necessary.
1361          */
1362         assert(mb_len >= RTE_PKTMBUF_HEADROOM);
1363         mprq_stride_size =
1364                 dev->data->dev_conf.rxmode.max_rx_pkt_len +
1365                 sizeof(struct rte_mbuf_ext_shared_info) +
1366                 RTE_PKTMBUF_HEADROOM;
1367         if (mprq_en &&
1368             desc > (1U << config->mprq.stride_num_n) &&
1369             mprq_stride_size <= (1U << config->mprq.max_stride_size_n)) {
1370                 /* TODO: Rx scatter isn't supported yet. */
1371                 tmpl->rxq.sges_n = 0;
1372                 /* Trim the number of descs needed. */
1373                 desc >>= config->mprq.stride_num_n;
1374                 tmpl->rxq.strd_num_n = config->mprq.stride_num_n;
1375                 tmpl->rxq.strd_sz_n = RTE_MAX(log2above(mprq_stride_size),
1376                                               config->mprq.min_stride_size_n);
1377                 tmpl->rxq.strd_shift_en = MLX5_MPRQ_TWO_BYTE_SHIFT;
1378                 tmpl->rxq.mprq_max_memcpy_len =
1379                         RTE_MIN(mb_len - RTE_PKTMBUF_HEADROOM,
1380                                 config->mprq.max_memcpy_len);
1381                 DRV_LOG(DEBUG,
1382                         "port %u Rx queue %u: Multi-Packet RQ is enabled"
1383                         " strd_num_n = %u, strd_sz_n = %u",
1384                         dev->data->port_id, idx,
1385                         tmpl->rxq.strd_num_n, tmpl->rxq.strd_sz_n);
1386         } else if (dev->data->dev_conf.rxmode.max_rx_pkt_len <=
1387                    (mb_len - RTE_PKTMBUF_HEADROOM)) {
1388                 tmpl->rxq.sges_n = 0;
1389         } else if (offloads & DEV_RX_OFFLOAD_SCATTER) {
1390                 unsigned int size =
1391                         RTE_PKTMBUF_HEADROOM +
1392                         dev->data->dev_conf.rxmode.max_rx_pkt_len;
1393                 unsigned int sges_n;
1394
1395                 /*
1396                  * Determine the number of SGEs needed for a full packet
1397                  * and round it to the next power of two.
1398                  */
1399                 sges_n = log2above((size / mb_len) + !!(size % mb_len));
1400                 tmpl->rxq.sges_n = sges_n;
1401                 /* Make sure rxq.sges_n did not overflow. */
1402                 size = mb_len * (1 << tmpl->rxq.sges_n);
1403                 size -= RTE_PKTMBUF_HEADROOM;
1404                 if (size < dev->data->dev_conf.rxmode.max_rx_pkt_len) {
1405                         DRV_LOG(ERR,
1406                                 "port %u too many SGEs (%u) needed to handle"
1407                                 " requested maximum packet size %u",
1408                                 dev->data->port_id,
1409                                 1 << sges_n,
1410                                 dev->data->dev_conf.rxmode.max_rx_pkt_len);
1411                         rte_errno = EOVERFLOW;
1412                         goto error;
1413                 }
1414         } else {
1415                 DRV_LOG(WARNING,
1416                         "port %u the requested maximum Rx packet size (%u) is"
1417                         " larger than a single mbuf (%u) and scattered mode has"
1418                         " not been requested",
1419                         dev->data->port_id,
1420                         dev->data->dev_conf.rxmode.max_rx_pkt_len,
1421                         mb_len - RTE_PKTMBUF_HEADROOM);
1422         }
1423         if (mprq_en && !mlx5_rxq_mprq_enabled(&tmpl->rxq))
1424                 DRV_LOG(WARNING,
1425                         "port %u MPRQ is requested but cannot be enabled"
1426                         " (requested: desc = %u, stride_sz = %u,"
1427                         " supported: min_stride_num = %u, max_stride_sz = %u).",
1428                         dev->data->port_id, desc, mprq_stride_size,
1429                         (1 << config->mprq.stride_num_n),
1430                         (1 << config->mprq.max_stride_size_n));
1431         DRV_LOG(DEBUG, "port %u maximum number of segments per packet: %u",
1432                 dev->data->port_id, 1 << tmpl->rxq.sges_n);
1433         if (desc % (1 << tmpl->rxq.sges_n)) {
1434                 DRV_LOG(ERR,
1435                         "port %u number of Rx queue descriptors (%u) is not a"
1436                         " multiple of SGEs per packet (%u)",
1437                         dev->data->port_id,
1438                         desc,
1439                         1 << tmpl->rxq.sges_n);
1440                 rte_errno = EINVAL;
1441                 goto error;
1442         }
1443         /* Toggle RX checksum offload if hardware supports it. */
1444         tmpl->rxq.csum = !!(offloads & DEV_RX_OFFLOAD_CHECKSUM);
1445         tmpl->rxq.hw_timestamp = !!(offloads & DEV_RX_OFFLOAD_TIMESTAMP);
1446         /* Configure VLAN stripping. */
1447         tmpl->rxq.vlan_strip = !!(offloads & DEV_RX_OFFLOAD_VLAN_STRIP);
1448         /* By default, FCS (CRC) is stripped by hardware. */
1449         tmpl->rxq.crc_present = 0;
1450         if (offloads & DEV_RX_OFFLOAD_KEEP_CRC) {
1451                 if (config->hw_fcs_strip) {
1452                         tmpl->rxq.crc_present = 1;
1453                 } else {
1454                         DRV_LOG(WARNING,
1455                                 "port %u CRC stripping has been disabled but will"
1456                                 " still be performed by hardware, make sure MLNX_OFED"
1457                                 " and firmware are up to date",
1458                                 dev->data->port_id);
1459                 }
1460         }
1461         DRV_LOG(DEBUG,
1462                 "port %u CRC stripping is %s, %u bytes will be subtracted from"
1463                 " incoming frames to hide it",
1464                 dev->data->port_id,
1465                 tmpl->rxq.crc_present ? "disabled" : "enabled",
1466                 tmpl->rxq.crc_present << 2);
1467         /* Save port ID. */
1468         tmpl->rxq.rss_hash = !!priv->rss_conf.rss_hf &&
1469                 (!!(dev->data->dev_conf.rxmode.mq_mode & ETH_MQ_RX_RSS));
1470         tmpl->rxq.port_id = dev->data->port_id;
1471         tmpl->priv = priv;
1472         tmpl->rxq.mp = mp;
1473         tmpl->rxq.stats.idx = idx;
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->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  *   TX 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 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  *   TX 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 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 if the queue can be released.
1553  *
1554  * @param dev
1555  *   Pointer to Ethernet device.
1556  * @param idx
1557  *   TX queue index.
1558  *
1559  * @return
1560  *   1 if the queue can be released, negative errno otherwise and rte_errno is
1561  *   set.
1562  */
1563 int
1564 mlx5_rxq_releasable(struct rte_eth_dev *dev, uint16_t idx)
1565 {
1566         struct priv *priv = dev->data->dev_private;
1567         struct mlx5_rxq_ctrl *rxq_ctrl;
1568
1569         if (!(*priv->rxqs)[idx]) {
1570                 rte_errno = EINVAL;
1571                 return -rte_errno;
1572         }
1573         rxq_ctrl = container_of((*priv->rxqs)[idx], struct mlx5_rxq_ctrl, rxq);
1574         return (rte_atomic32_read(&rxq_ctrl->refcnt) == 1);
1575 }
1576
1577 /**
1578  * Verify the Rx Queue list is empty
1579  *
1580  * @param dev
1581  *   Pointer to Ethernet device.
1582  *
1583  * @return
1584  *   The number of object not released.
1585  */
1586 int
1587 mlx5_rxq_verify(struct rte_eth_dev *dev)
1588 {
1589         struct priv *priv = dev->data->dev_private;
1590         struct mlx5_rxq_ctrl *rxq_ctrl;
1591         int ret = 0;
1592
1593         LIST_FOREACH(rxq_ctrl, &priv->rxqsctrl, next) {
1594                 DRV_LOG(DEBUG, "port %u Rx Queue %u still referenced",
1595                         dev->data->port_id, rxq_ctrl->idx);
1596                 ++ret;
1597         }
1598         return ret;
1599 }
1600
1601 /**
1602  * Create an indirection table.
1603  *
1604  * @param dev
1605  *   Pointer to Ethernet device.
1606  * @param queues
1607  *   Queues entering in the indirection table.
1608  * @param queues_n
1609  *   Number of queues in the array.
1610  *
1611  * @return
1612  *   The Verbs object initialised, NULL otherwise and rte_errno is set.
1613  */
1614 struct mlx5_ind_table_ibv *
1615 mlx5_ind_table_ibv_new(struct rte_eth_dev *dev, const uint16_t *queues,
1616                        uint32_t queues_n)
1617 {
1618         struct priv *priv = dev->data->dev_private;
1619         struct mlx5_ind_table_ibv *ind_tbl;
1620         const unsigned int wq_n = rte_is_power_of_2(queues_n) ?
1621                 log2above(queues_n) :
1622                 log2above(priv->config.ind_table_max_size);
1623         struct ibv_wq *wq[1 << wq_n];
1624         unsigned int i;
1625         unsigned int j;
1626
1627         ind_tbl = rte_calloc(__func__, 1, sizeof(*ind_tbl) +
1628                              queues_n * sizeof(uint16_t), 0);
1629         if (!ind_tbl) {
1630                 rte_errno = ENOMEM;
1631                 return NULL;
1632         }
1633         for (i = 0; i != queues_n; ++i) {
1634                 struct mlx5_rxq_ctrl *rxq = mlx5_rxq_get(dev, queues[i]);
1635
1636                 if (!rxq)
1637                         goto error;
1638                 wq[i] = rxq->ibv->wq;
1639                 ind_tbl->queues[i] = queues[i];
1640         }
1641         ind_tbl->queues_n = queues_n;
1642         /* Finalise indirection table. */
1643         for (j = 0; i != (unsigned int)(1 << wq_n); ++i, ++j)
1644                 wq[i] = wq[j];
1645         ind_tbl->ind_table = mlx5_glue->create_rwq_ind_table
1646                 (priv->ctx,
1647                  &(struct ibv_rwq_ind_table_init_attr){
1648                         .log_ind_tbl_size = wq_n,
1649                         .ind_tbl = wq,
1650                         .comp_mask = 0,
1651                  });
1652         if (!ind_tbl->ind_table) {
1653                 rte_errno = errno;
1654                 goto error;
1655         }
1656         rte_atomic32_inc(&ind_tbl->refcnt);
1657         LIST_INSERT_HEAD(&priv->ind_tbls, ind_tbl, next);
1658         return ind_tbl;
1659 error:
1660         rte_free(ind_tbl);
1661         DEBUG("port %u cannot create indirection table", dev->data->port_id);
1662         return NULL;
1663 }
1664
1665 /**
1666  * Get an indirection table.
1667  *
1668  * @param dev
1669  *   Pointer to Ethernet device.
1670  * @param queues
1671  *   Queues entering in the indirection table.
1672  * @param queues_n
1673  *   Number of queues in the array.
1674  *
1675  * @return
1676  *   An indirection table if found.
1677  */
1678 struct mlx5_ind_table_ibv *
1679 mlx5_ind_table_ibv_get(struct rte_eth_dev *dev, const uint16_t *queues,
1680                        uint32_t queues_n)
1681 {
1682         struct priv *priv = dev->data->dev_private;
1683         struct mlx5_ind_table_ibv *ind_tbl;
1684
1685         LIST_FOREACH(ind_tbl, &priv->ind_tbls, next) {
1686                 if ((ind_tbl->queues_n == queues_n) &&
1687                     (memcmp(ind_tbl->queues, queues,
1688                             ind_tbl->queues_n * sizeof(ind_tbl->queues[0]))
1689                      == 0))
1690                         break;
1691         }
1692         if (ind_tbl) {
1693                 unsigned int i;
1694
1695                 rte_atomic32_inc(&ind_tbl->refcnt);
1696                 for (i = 0; i != ind_tbl->queues_n; ++i)
1697                         mlx5_rxq_get(dev, ind_tbl->queues[i]);
1698         }
1699         return ind_tbl;
1700 }
1701
1702 /**
1703  * Release an indirection table.
1704  *
1705  * @param dev
1706  *   Pointer to Ethernet device.
1707  * @param ind_table
1708  *   Indirection table to release.
1709  *
1710  * @return
1711  *   1 while a reference on it exists, 0 when freed.
1712  */
1713 int
1714 mlx5_ind_table_ibv_release(struct rte_eth_dev *dev,
1715                            struct mlx5_ind_table_ibv *ind_tbl)
1716 {
1717         unsigned int i;
1718
1719         if (rte_atomic32_dec_and_test(&ind_tbl->refcnt))
1720                 claim_zero(mlx5_glue->destroy_rwq_ind_table
1721                            (ind_tbl->ind_table));
1722         for (i = 0; i != ind_tbl->queues_n; ++i)
1723                 claim_nonzero(mlx5_rxq_release(dev, ind_tbl->queues[i]));
1724         if (!rte_atomic32_read(&ind_tbl->refcnt)) {
1725                 LIST_REMOVE(ind_tbl, next);
1726                 rte_free(ind_tbl);
1727                 return 0;
1728         }
1729         return 1;
1730 }
1731
1732 /**
1733  * Verify the Rx Queue list is empty
1734  *
1735  * @param dev
1736  *   Pointer to Ethernet device.
1737  *
1738  * @return
1739  *   The number of object not released.
1740  */
1741 int
1742 mlx5_ind_table_ibv_verify(struct rte_eth_dev *dev)
1743 {
1744         struct priv *priv = dev->data->dev_private;
1745         struct mlx5_ind_table_ibv *ind_tbl;
1746         int ret = 0;
1747
1748         LIST_FOREACH(ind_tbl, &priv->ind_tbls, next) {
1749                 DRV_LOG(DEBUG,
1750                         "port %u Verbs indirection table %p still referenced",
1751                         dev->data->port_id, (void *)ind_tbl);
1752                 ++ret;
1753         }
1754         return ret;
1755 }
1756
1757 /**
1758  * Create an Rx Hash queue.
1759  *
1760  * @param dev
1761  *   Pointer to Ethernet device.
1762  * @param rss_key
1763  *   RSS key for the Rx hash queue.
1764  * @param rss_key_len
1765  *   RSS key length.
1766  * @param hash_fields
1767  *   Verbs protocol hash field to make the RSS on.
1768  * @param queues
1769  *   Queues entering in hash queue. In case of empty hash_fields only the
1770  *   first queue index will be taken for the indirection table.
1771  * @param queues_n
1772  *   Number of queues.
1773  * @param tunnel
1774  *   Tunnel type.
1775  *
1776  * @return
1777  *   The Verbs object initialised, NULL otherwise and rte_errno is set.
1778  */
1779 struct mlx5_hrxq *
1780 mlx5_hrxq_new(struct rte_eth_dev *dev,
1781               const uint8_t *rss_key, uint32_t rss_key_len,
1782               uint64_t hash_fields,
1783               const uint16_t *queues, uint32_t queues_n,
1784               int tunnel __rte_unused)
1785 {
1786         struct priv *priv = dev->data->dev_private;
1787         struct mlx5_hrxq *hrxq;
1788         struct mlx5_ind_table_ibv *ind_tbl;
1789         struct ibv_qp *qp;
1790 #ifdef HAVE_IBV_DEVICE_TUNNEL_SUPPORT
1791         struct mlx5dv_qp_init_attr qp_init_attr;
1792 #endif
1793         int err;
1794
1795         queues_n = hash_fields ? queues_n : 1;
1796         ind_tbl = mlx5_ind_table_ibv_get(dev, queues, queues_n);
1797         if (!ind_tbl)
1798                 ind_tbl = mlx5_ind_table_ibv_new(dev, queues, queues_n);
1799         if (!ind_tbl) {
1800                 rte_errno = ENOMEM;
1801                 return NULL;
1802         }
1803 #ifdef HAVE_IBV_DEVICE_TUNNEL_SUPPORT
1804         memset(&qp_init_attr, 0, sizeof(qp_init_attr));
1805         if (tunnel) {
1806                 qp_init_attr.comp_mask =
1807                                 MLX5DV_QP_INIT_ATTR_MASK_QP_CREATE_FLAGS;
1808                 qp_init_attr.create_flags = MLX5DV_QP_CREATE_TUNNEL_OFFLOADS;
1809         }
1810 #ifdef HAVE_IBV_FLOW_DV_SUPPORT
1811         if (dev->data->dev_conf.lpbk_mode) {
1812                 /* Allow packet sent from NIC loop back w/o source MAC check. */
1813                 qp_init_attr.comp_mask |=
1814                                 MLX5DV_QP_INIT_ATTR_MASK_QP_CREATE_FLAGS;
1815                 qp_init_attr.create_flags |=
1816                                 MLX5DV_QP_CREATE_TIR_ALLOW_SELF_LOOPBACK_UC;
1817         }
1818 #endif
1819         qp = mlx5_glue->dv_create_qp
1820                 (priv->ctx,
1821                  &(struct ibv_qp_init_attr_ex){
1822                         .qp_type = IBV_QPT_RAW_PACKET,
1823                         .comp_mask =
1824                                 IBV_QP_INIT_ATTR_PD |
1825                                 IBV_QP_INIT_ATTR_IND_TABLE |
1826                                 IBV_QP_INIT_ATTR_RX_HASH,
1827                         .rx_hash_conf = (struct ibv_rx_hash_conf){
1828                                 .rx_hash_function = IBV_RX_HASH_FUNC_TOEPLITZ,
1829                                 .rx_hash_key_len = rss_key_len,
1830                                 .rx_hash_key = (void *)(uintptr_t)rss_key,
1831                                 .rx_hash_fields_mask = hash_fields,
1832                         },
1833                         .rwq_ind_tbl = ind_tbl->ind_table,
1834                         .pd = priv->pd,
1835                  },
1836                  &qp_init_attr);
1837 #else
1838         qp = mlx5_glue->create_qp_ex
1839                 (priv->ctx,
1840                  &(struct ibv_qp_init_attr_ex){
1841                         .qp_type = IBV_QPT_RAW_PACKET,
1842                         .comp_mask =
1843                                 IBV_QP_INIT_ATTR_PD |
1844                                 IBV_QP_INIT_ATTR_IND_TABLE |
1845                                 IBV_QP_INIT_ATTR_RX_HASH,
1846                         .rx_hash_conf = (struct ibv_rx_hash_conf){
1847                                 .rx_hash_function = IBV_RX_HASH_FUNC_TOEPLITZ,
1848                                 .rx_hash_key_len = rss_key_len,
1849                                 .rx_hash_key = (void *)(uintptr_t)rss_key,
1850                                 .rx_hash_fields_mask = hash_fields,
1851                         },
1852                         .rwq_ind_tbl = ind_tbl->ind_table,
1853                         .pd = priv->pd,
1854                  });
1855 #endif
1856         if (!qp) {
1857                 rte_errno = errno;
1858                 goto error;
1859         }
1860         hrxq = rte_calloc(__func__, 1, sizeof(*hrxq) + rss_key_len, 0);
1861         if (!hrxq)
1862                 goto error;
1863         hrxq->ind_table = ind_tbl;
1864         hrxq->qp = qp;
1865         hrxq->rss_key_len = rss_key_len;
1866         hrxq->hash_fields = hash_fields;
1867         memcpy(hrxq->rss_key, rss_key, rss_key_len);
1868         rte_atomic32_inc(&hrxq->refcnt);
1869         LIST_INSERT_HEAD(&priv->hrxqs, hrxq, next);
1870         return hrxq;
1871 error:
1872         err = rte_errno; /* Save rte_errno before cleanup. */
1873         mlx5_ind_table_ibv_release(dev, ind_tbl);
1874         if (qp)
1875                 claim_zero(mlx5_glue->destroy_qp(qp));
1876         rte_errno = err; /* Restore rte_errno. */
1877         return NULL;
1878 }
1879
1880 /**
1881  * Get an Rx Hash queue.
1882  *
1883  * @param dev
1884  *   Pointer to Ethernet device.
1885  * @param rss_conf
1886  *   RSS configuration for the Rx hash queue.
1887  * @param queues
1888  *   Queues entering in hash queue. In case of empty hash_fields only the
1889  *   first queue index will be taken for the indirection table.
1890  * @param queues_n
1891  *   Number of queues.
1892  *
1893  * @return
1894  *   An hash Rx queue on success.
1895  */
1896 struct mlx5_hrxq *
1897 mlx5_hrxq_get(struct rte_eth_dev *dev,
1898               const uint8_t *rss_key, uint32_t rss_key_len,
1899               uint64_t hash_fields,
1900               const uint16_t *queues, uint32_t queues_n)
1901 {
1902         struct priv *priv = dev->data->dev_private;
1903         struct mlx5_hrxq *hrxq;
1904
1905         queues_n = hash_fields ? queues_n : 1;
1906         LIST_FOREACH(hrxq, &priv->hrxqs, next) {
1907                 struct mlx5_ind_table_ibv *ind_tbl;
1908
1909                 if (hrxq->rss_key_len != rss_key_len)
1910                         continue;
1911                 if (memcmp(hrxq->rss_key, rss_key, rss_key_len))
1912                         continue;
1913                 if (hrxq->hash_fields != hash_fields)
1914                         continue;
1915                 ind_tbl = mlx5_ind_table_ibv_get(dev, queues, queues_n);
1916                 if (!ind_tbl)
1917                         continue;
1918                 if (ind_tbl != hrxq->ind_table) {
1919                         mlx5_ind_table_ibv_release(dev, ind_tbl);
1920                         continue;
1921                 }
1922                 rte_atomic32_inc(&hrxq->refcnt);
1923                 return hrxq;
1924         }
1925         return NULL;
1926 }
1927
1928 /**
1929  * Release the hash Rx queue.
1930  *
1931  * @param dev
1932  *   Pointer to Ethernet device.
1933  * @param hrxq
1934  *   Pointer to Hash Rx queue to release.
1935  *
1936  * @return
1937  *   1 while a reference on it exists, 0 when freed.
1938  */
1939 int
1940 mlx5_hrxq_release(struct rte_eth_dev *dev, struct mlx5_hrxq *hrxq)
1941 {
1942         if (rte_atomic32_dec_and_test(&hrxq->refcnt)) {
1943                 claim_zero(mlx5_glue->destroy_qp(hrxq->qp));
1944                 mlx5_ind_table_ibv_release(dev, hrxq->ind_table);
1945                 LIST_REMOVE(hrxq, next);
1946                 rte_free(hrxq);
1947                 return 0;
1948         }
1949         claim_nonzero(mlx5_ind_table_ibv_release(dev, hrxq->ind_table));
1950         return 1;
1951 }
1952
1953 /**
1954  * Verify the Rx Queue list is empty
1955  *
1956  * @param dev
1957  *   Pointer to Ethernet device.
1958  *
1959  * @return
1960  *   The number of object not released.
1961  */
1962 int
1963 mlx5_hrxq_ibv_verify(struct rte_eth_dev *dev)
1964 {
1965         struct priv *priv = dev->data->dev_private;
1966         struct mlx5_hrxq *hrxq;
1967         int ret = 0;
1968
1969         LIST_FOREACH(hrxq, &priv->hrxqs, next) {
1970                 DRV_LOG(DEBUG,
1971                         "port %u Verbs hash Rx queue %p still referenced",
1972                         dev->data->port_id, (void *)hrxq);
1973                 ++ret;
1974         }
1975         return ret;
1976 }
1977
1978 /**
1979  * Create a drop Rx queue Verbs object.
1980  *
1981  * @param dev
1982  *   Pointer to Ethernet device.
1983  *
1984  * @return
1985  *   The Verbs object initialised, NULL otherwise and rte_errno is set.
1986  */
1987 struct mlx5_rxq_ibv *
1988 mlx5_rxq_ibv_drop_new(struct rte_eth_dev *dev)
1989 {
1990         struct priv *priv = dev->data->dev_private;
1991         struct ibv_cq *cq;
1992         struct ibv_wq *wq = NULL;
1993         struct mlx5_rxq_ibv *rxq;
1994
1995         if (priv->drop_queue.rxq)
1996                 return priv->drop_queue.rxq;
1997         cq = mlx5_glue->create_cq(priv->ctx, 1, NULL, NULL, 0);
1998         if (!cq) {
1999                 DEBUG("port %u cannot allocate CQ for drop queue",
2000                       dev->data->port_id);
2001                 rte_errno = errno;
2002                 goto error;
2003         }
2004         wq = mlx5_glue->create_wq(priv->ctx,
2005                  &(struct ibv_wq_init_attr){
2006                         .wq_type = IBV_WQT_RQ,
2007                         .max_wr = 1,
2008                         .max_sge = 1,
2009                         .pd = priv->pd,
2010                         .cq = cq,
2011                  });
2012         if (!wq) {
2013                 DEBUG("port %u cannot allocate WQ for drop queue",
2014                       dev->data->port_id);
2015                 rte_errno = errno;
2016                 goto error;
2017         }
2018         rxq = rte_calloc(__func__, 1, sizeof(*rxq), 0);
2019         if (!rxq) {
2020                 DEBUG("port %u cannot allocate drop Rx queue memory",
2021                       dev->data->port_id);
2022                 rte_errno = ENOMEM;
2023                 goto error;
2024         }
2025         rxq->cq = cq;
2026         rxq->wq = wq;
2027         priv->drop_queue.rxq = rxq;
2028         return rxq;
2029 error:
2030         if (wq)
2031                 claim_zero(mlx5_glue->destroy_wq(wq));
2032         if (cq)
2033                 claim_zero(mlx5_glue->destroy_cq(cq));
2034         return NULL;
2035 }
2036
2037 /**
2038  * Release a drop Rx queue Verbs object.
2039  *
2040  * @param dev
2041  *   Pointer to Ethernet device.
2042  *
2043  * @return
2044  *   The Verbs object initialised, NULL otherwise and rte_errno is set.
2045  */
2046 void
2047 mlx5_rxq_ibv_drop_release(struct rte_eth_dev *dev)
2048 {
2049         struct priv *priv = dev->data->dev_private;
2050         struct mlx5_rxq_ibv *rxq = priv->drop_queue.rxq;
2051
2052         if (rxq->wq)
2053                 claim_zero(mlx5_glue->destroy_wq(rxq->wq));
2054         if (rxq->cq)
2055                 claim_zero(mlx5_glue->destroy_cq(rxq->cq));
2056         rte_free(rxq);
2057         priv->drop_queue.rxq = NULL;
2058 }
2059
2060 /**
2061  * Create a drop indirection table.
2062  *
2063  * @param dev
2064  *   Pointer to Ethernet device.
2065  *
2066  * @return
2067  *   The Verbs object initialised, NULL otherwise and rte_errno is set.
2068  */
2069 struct mlx5_ind_table_ibv *
2070 mlx5_ind_table_ibv_drop_new(struct rte_eth_dev *dev)
2071 {
2072         struct priv *priv = dev->data->dev_private;
2073         struct mlx5_ind_table_ibv *ind_tbl;
2074         struct mlx5_rxq_ibv *rxq;
2075         struct mlx5_ind_table_ibv tmpl;
2076
2077         rxq = mlx5_rxq_ibv_drop_new(dev);
2078         if (!rxq)
2079                 return NULL;
2080         tmpl.ind_table = mlx5_glue->create_rwq_ind_table
2081                 (priv->ctx,
2082                  &(struct ibv_rwq_ind_table_init_attr){
2083                         .log_ind_tbl_size = 0,
2084                         .ind_tbl = &rxq->wq,
2085                         .comp_mask = 0,
2086                  });
2087         if (!tmpl.ind_table) {
2088                 DEBUG("port %u cannot allocate indirection table for drop"
2089                       " queue",
2090                       dev->data->port_id);
2091                 rte_errno = errno;
2092                 goto error;
2093         }
2094         ind_tbl = rte_calloc(__func__, 1, sizeof(*ind_tbl), 0);
2095         if (!ind_tbl) {
2096                 rte_errno = ENOMEM;
2097                 goto error;
2098         }
2099         ind_tbl->ind_table = tmpl.ind_table;
2100         return ind_tbl;
2101 error:
2102         mlx5_rxq_ibv_drop_release(dev);
2103         return NULL;
2104 }
2105
2106 /**
2107  * Release a drop indirection table.
2108  *
2109  * @param dev
2110  *   Pointer to Ethernet device.
2111  */
2112 void
2113 mlx5_ind_table_ibv_drop_release(struct rte_eth_dev *dev)
2114 {
2115         struct priv *priv = dev->data->dev_private;
2116         struct mlx5_ind_table_ibv *ind_tbl = priv->drop_queue.hrxq->ind_table;
2117
2118         claim_zero(mlx5_glue->destroy_rwq_ind_table(ind_tbl->ind_table));
2119         mlx5_rxq_ibv_drop_release(dev);
2120         rte_free(ind_tbl);
2121         priv->drop_queue.hrxq->ind_table = NULL;
2122 }
2123
2124 /**
2125  * Create a drop Rx Hash queue.
2126  *
2127  * @param dev
2128  *   Pointer to Ethernet device.
2129  *
2130  * @return
2131  *   The Verbs object initialised, NULL otherwise and rte_errno is set.
2132  */
2133 struct mlx5_hrxq *
2134 mlx5_hrxq_drop_new(struct rte_eth_dev *dev)
2135 {
2136         struct priv *priv = dev->data->dev_private;
2137         struct mlx5_ind_table_ibv *ind_tbl;
2138         struct ibv_qp *qp;
2139         struct mlx5_hrxq *hrxq;
2140
2141         if (priv->drop_queue.hrxq) {
2142                 rte_atomic32_inc(&priv->drop_queue.hrxq->refcnt);
2143                 return priv->drop_queue.hrxq;
2144         }
2145         ind_tbl = mlx5_ind_table_ibv_drop_new(dev);
2146         if (!ind_tbl)
2147                 return NULL;
2148         qp = mlx5_glue->create_qp_ex(priv->ctx,
2149                  &(struct ibv_qp_init_attr_ex){
2150                         .qp_type = IBV_QPT_RAW_PACKET,
2151                         .comp_mask =
2152                                 IBV_QP_INIT_ATTR_PD |
2153                                 IBV_QP_INIT_ATTR_IND_TABLE |
2154                                 IBV_QP_INIT_ATTR_RX_HASH,
2155                         .rx_hash_conf = (struct ibv_rx_hash_conf){
2156                                 .rx_hash_function =
2157                                         IBV_RX_HASH_FUNC_TOEPLITZ,
2158                                 .rx_hash_key_len = MLX5_RSS_HASH_KEY_LEN,
2159                                 .rx_hash_key = rss_hash_default_key,
2160                                 .rx_hash_fields_mask = 0,
2161                                 },
2162                         .rwq_ind_tbl = ind_tbl->ind_table,
2163                         .pd = priv->pd
2164                  });
2165         if (!qp) {
2166                 DEBUG("port %u cannot allocate QP for drop queue",
2167                       dev->data->port_id);
2168                 rte_errno = errno;
2169                 goto error;
2170         }
2171         hrxq = rte_calloc(__func__, 1, sizeof(*hrxq), 0);
2172         if (!hrxq) {
2173                 DRV_LOG(WARNING,
2174                         "port %u cannot allocate memory for drop queue",
2175                         dev->data->port_id);
2176                 rte_errno = ENOMEM;
2177                 goto error;
2178         }
2179         hrxq->ind_table = ind_tbl;
2180         hrxq->qp = qp;
2181         priv->drop_queue.hrxq = hrxq;
2182         rte_atomic32_set(&hrxq->refcnt, 1);
2183         return hrxq;
2184 error:
2185         if (ind_tbl)
2186                 mlx5_ind_table_ibv_drop_release(dev);
2187         return NULL;
2188 }
2189
2190 /**
2191  * Release a drop hash Rx queue.
2192  *
2193  * @param dev
2194  *   Pointer to Ethernet device.
2195  */
2196 void
2197 mlx5_hrxq_drop_release(struct rte_eth_dev *dev)
2198 {
2199         struct priv *priv = dev->data->dev_private;
2200         struct mlx5_hrxq *hrxq = priv->drop_queue.hrxq;
2201
2202         if (rte_atomic32_dec_and_test(&hrxq->refcnt)) {
2203                 claim_zero(mlx5_glue->destroy_qp(hrxq->qp));
2204                 mlx5_ind_table_ibv_drop_release(dev);
2205                 rte_free(hrxq);
2206                 priv->drop_queue.hrxq = NULL;
2207         }
2208 }