drivers/net/sfc/sfc_repr.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  *
   3  * Copyright(c) 2019-2021 Xilinx, Inc.
   4  * Copyright(c) 2019 Solarflare Communications Inc.
   5  *
   6  * This software was jointly developed between OKTET Labs (under contract
   7  * for Solarflare) and Solarflare Communications, Inc.
   8  */
   9
  10 #include <stdint.h>
  11
  12 #include <rte_mbuf.h>
  13 #include <rte_ethdev.h>
  14 #include <rte_malloc.h>
  15 #include <ethdev_driver.h>
  16
  17 #include "efx.h"
  18
  19 #include "sfc_log.h"
  20 #include "sfc_debug.h"
  21 #include "sfc_repr.h"
  22 #include "sfc_ethdev_state.h"
  23 #include "sfc_repr_proxy_api.h"
  24 #include "sfc_switch.h"
  25 #include "sfc_dp_tx.h"
  26
  27 /** Multi-process shared representor private data */
  28 struct sfc_repr_shared {
  29         uint16_t                pf_port_id;
  30         uint16_t                repr_id;
  31         uint16_t                switch_domain_id;
  32         uint16_t                switch_port_id;
  33 };
  34
  35 struct sfc_repr_rxq {
  36         /* Datapath members */
  37         struct rte_ring                 *ring;
  38 };
  39
  40 struct sfc_repr_txq {
  41         /* Datapath members */
  42         struct rte_ring                 *ring;
  43         efx_mport_id_t                  egress_mport;
  44 };
  45
  46 /** Primary process representor private data */
  47 struct sfc_repr {
  48         /**
  49          * PMD setup and configuration is not thread safe. Since it is not
  50          * performance sensitive, it is better to guarantee thread-safety
  51          * and add device level lock. Adapter control operations which
  52          * change its state should acquire the lock.
  53          */
  54         rte_spinlock_t                  lock;
  55         enum sfc_ethdev_state           state;
  56 };
  57
  58 #define sfcr_err(sr, ...) \
  59         do {                                                            \
  60                 const struct sfc_repr *_sr = (sr);                      \
  61                                                                         \
  62                 (void)_sr;                                              \
  63                 SFC_GENERIC_LOG(ERR, __VA_ARGS__);                      \
  64         } while (0)
  65
  66 #define sfcr_warn(sr, ...) \
  67         do {                                                            \
  68                 const struct sfc_repr *_sr = (sr);                      \
  69                                                                         \
  70                 (void)_sr;                                              \
  71                 SFC_GENERIC_LOG(WARNING, __VA_ARGS__);                  \
  72         } while (0)
  73
  74 #define sfcr_info(sr, ...) \
  75         do {                                                            \
  76                 const struct sfc_repr *_sr = (sr);                      \
  77                                                                         \
  78                 (void)_sr;                                              \
  79                 SFC_GENERIC_LOG(INFO,                                   \
  80                                 RTE_FMT("%s() "                         \
  81                                 RTE_FMT_HEAD(__VA_ARGS__ ,),            \
  82                                 __func__,                               \
  83                                 RTE_FMT_TAIL(__VA_ARGS__ ,)));          \
  84         } while (0)
  85
  86 static inline struct sfc_repr_shared *
  87 sfc_repr_shared_by_eth_dev(struct rte_eth_dev *eth_dev)
  88 {
  89         struct sfc_repr_shared *srs = eth_dev->data->dev_private;
  90
  91         return srs;
  92 }
  93
  94 static inline struct sfc_repr *
  95 sfc_repr_by_eth_dev(struct rte_eth_dev *eth_dev)
  96 {
  97         struct sfc_repr *sr = eth_dev->process_private;
  98
  99         return sr;
 100 }
 101
 102 /*
 103  * Add wrapper functions to acquire/release lock to be able to remove or
 104  * change the lock in one place.
 105  */
 106
 107 static inline void
 108 sfc_repr_lock_init(struct sfc_repr *sr)
 109 {
 110         rte_spinlock_init(&sr->lock);
 111 }
 112
 113 #if defined(RTE_LIBRTE_SFC_EFX_DEBUG) || defined(RTE_ENABLE_ASSERT)
 114
 115 static inline int
 116 sfc_repr_lock_is_locked(struct sfc_repr *sr)
 117 {
 118         return rte_spinlock_is_locked(&sr->lock);
 119 }
 120
 121 #endif
 122
 123 static inline void
 124 sfc_repr_lock(struct sfc_repr *sr)
 125 {
 126         rte_spinlock_lock(&sr->lock);
 127 }
 128
 129 static inline void
 130 sfc_repr_unlock(struct sfc_repr *sr)
 131 {
 132         rte_spinlock_unlock(&sr->lock);
 133 }
 134
 135 static inline void
 136 sfc_repr_lock_fini(__rte_unused struct sfc_repr *sr)
 137 {
 138         /* Just for symmetry of the API */
 139 }
 140
 141 static void
 142 sfc_repr_rx_queue_stop(void *queue)
 143 {
 144         struct sfc_repr_rxq *rxq = queue;
 145
 146         if (rxq == NULL)
 147                 return;
 148
 149         rte_ring_reset(rxq->ring);
 150 }
 151
 152 static void
 153 sfc_repr_tx_queue_stop(void *queue)
 154 {
 155         struct sfc_repr_txq *txq = queue;
 156
 157         if (txq == NULL)
 158                 return;
 159
 160         rte_ring_reset(txq->ring);
 161 }
 162
 163 static int
 164 sfc_repr_start(struct rte_eth_dev *dev)
 165 {
 166         struct sfc_repr *sr = sfc_repr_by_eth_dev(dev);
 167         struct sfc_repr_shared *srs;
 168         int ret;
 169
 170         sfcr_info(sr, "entry");
 171
 172         SFC_ASSERT(sfc_repr_lock_is_locked(sr));
 173
 174         switch (sr->state) {
 175         case SFC_ETHDEV_CONFIGURED:
 176                 break;
 177         case SFC_ETHDEV_STARTED:
 178                 sfcr_info(sr, "already started");
 179                 return 0;
 180         default:
 181                 ret = -EINVAL;
 182                 goto fail_bad_state;
 183         }
 184
 185         sr->state = SFC_ETHDEV_STARTING;
 186
 187         srs = sfc_repr_shared_by_eth_dev(dev);
 188         ret = sfc_repr_proxy_start_repr(srs->pf_port_id, srs->repr_id);
 189         if (ret != 0) {
 190                 SFC_ASSERT(ret > 0);
 191                 ret = -ret;
 192                 goto fail_start;
 193         }
 194
 195         sr->state = SFC_ETHDEV_STARTED;
 196
 197         sfcr_info(sr, "done");
 198
 199         return 0;
 200
 201 fail_start:
 202         sr->state = SFC_ETHDEV_CONFIGURED;
 203
 204 fail_bad_state:
 205         sfcr_err(sr, "%s() failed: %s", __func__, rte_strerror(-ret));
 206         return ret;
 207 }
 208
 209 static int
 210 sfc_repr_dev_start(struct rte_eth_dev *dev)
 211 {
 212         struct sfc_repr *sr = sfc_repr_by_eth_dev(dev);
 213         int ret;
 214
 215         sfcr_info(sr, "entry");
 216
 217         sfc_repr_lock(sr);
 218         ret = sfc_repr_start(dev);
 219         sfc_repr_unlock(sr);
 220
 221         if (ret != 0)
 222                 goto fail_start;
 223
 224         sfcr_info(sr, "done");
 225
 226         return 0;
 227
 228 fail_start:
 229         sfcr_err(sr, "%s() failed: %s", __func__, rte_strerror(-ret));
 230         return ret;
 231 }
 232
 233 static int
 234 sfc_repr_stop(struct rte_eth_dev *dev)
 235 {
 236         struct sfc_repr *sr = sfc_repr_by_eth_dev(dev);
 237         struct sfc_repr_shared *srs;
 238         unsigned int i;
 239         int ret;
 240
 241         sfcr_info(sr, "entry");
 242
 243         SFC_ASSERT(sfc_repr_lock_is_locked(sr));
 244
 245         switch (sr->state) {
 246         case SFC_ETHDEV_STARTED:
 247                 break;
 248         case SFC_ETHDEV_CONFIGURED:
 249                 sfcr_info(sr, "already stopped");
 250                 return 0;
 251         default:
 252                 sfcr_err(sr, "stop in unexpected state %u", sr->state);
 253                 SFC_ASSERT(B_FALSE);
 254                 ret = -EINVAL;
 255                 goto fail_bad_state;
 256         }
 257
 258         srs = sfc_repr_shared_by_eth_dev(dev);
 259         ret = sfc_repr_proxy_stop_repr(srs->pf_port_id, srs->repr_id);
 260         if (ret != 0) {
 261                 SFC_ASSERT(ret > 0);
 262                 ret = -ret;
 263                 goto fail_stop;
 264         }
 265
 266         for (i = 0; i < dev->data->nb_rx_queues; i++)
 267                 sfc_repr_rx_queue_stop(dev->data->rx_queues[i]);
 268
 269         for (i = 0; i < dev->data->nb_tx_queues; i++)
 270                 sfc_repr_tx_queue_stop(dev->data->tx_queues[i]);
 271
 272         sr->state = SFC_ETHDEV_CONFIGURED;
 273         sfcr_info(sr, "done");
 274
 275         return 0;
 276
 277 fail_bad_state:
 278 fail_stop:
 279         sfcr_err(sr, "%s() failed: %s", __func__, rte_strerror(-ret));
 280
 281         return ret;
 282 }
 283
 284 static int
 285 sfc_repr_dev_stop(struct rte_eth_dev *dev)
 286 {
 287         struct sfc_repr *sr = sfc_repr_by_eth_dev(dev);
 288         int ret;
 289
 290         sfcr_info(sr, "entry");
 291
 292         sfc_repr_lock(sr);
 293
 294         ret = sfc_repr_stop(dev);
 295         if (ret != 0) {
 296                 sfcr_err(sr, "%s() failed to stop representor", __func__);
 297                 goto fail_stop;
 298         }
 299
 300         sfc_repr_unlock(sr);
 301
 302         sfcr_info(sr, "done");
 303
 304         return 0;
 305
 306 fail_stop:
 307         sfc_repr_unlock(sr);
 308
 309         sfcr_err(sr, "%s() failed %s", __func__, rte_strerror(-ret));
 310
 311         return ret;
 312 }
 313
 314 static int
 315 sfc_repr_check_conf(struct sfc_repr *sr, uint16_t nb_rx_queues,
 316                     const struct rte_eth_conf *conf)
 317 {
 318         const struct rte_eth_rss_conf *rss_conf;
 319         int ret = 0;
 320
 321         sfcr_info(sr, "entry");
 322
 323         if (conf->link_speeds != 0) {
 324                 sfcr_err(sr, "specific link speeds not supported");
 325                 ret = -EINVAL;
 326         }
 327
 328         switch (conf->rxmode.mq_mode) {
 329         case ETH_MQ_RX_RSS:
 330                 if (nb_rx_queues != 1) {
 331                         sfcr_err(sr, "Rx RSS is not supported with %u queues",
 332                                  nb_rx_queues);
 333                         ret = -EINVAL;
 334                         break;
 335                 }
 336
 337                 rss_conf = &conf->rx_adv_conf.rss_conf;
 338                 if (rss_conf->rss_key != NULL || rss_conf->rss_key_len != 0 ||
 339                     rss_conf->rss_hf != 0) {
 340                         sfcr_err(sr, "Rx RSS configuration is not supported");
 341                         ret = -EINVAL;
 342                 }
 343                 break;
 344         case ETH_MQ_RX_NONE:
 345                 break;
 346         default:
 347                 sfcr_err(sr, "Rx mode MQ modes other than RSS not supported");
 348                 ret = -EINVAL;
 349                 break;
 350         }
 351
 352         if (conf->txmode.mq_mode != ETH_MQ_TX_NONE) {
 353                 sfcr_err(sr, "Tx mode MQ modes not supported");
 354                 ret = -EINVAL;
 355         }
 356
 357         if (conf->lpbk_mode != 0) {
 358                 sfcr_err(sr, "loopback not supported");
 359                 ret = -EINVAL;
 360         }
 361
 362         if (conf->dcb_capability_en != 0) {
 363                 sfcr_err(sr, "priority-based flow control not supported");
 364                 ret = -EINVAL;
 365         }
 366
 367         if (conf->fdir_conf.mode != RTE_FDIR_MODE_NONE) {
 368                 sfcr_err(sr, "Flow Director not supported");
 369                 ret = -EINVAL;
 370         }
 371
 372         if (conf->intr_conf.lsc != 0) {
 373                 sfcr_err(sr, "link status change interrupt not supported");
 374                 ret = -EINVAL;
 375         }
 376
 377         if (conf->intr_conf.rxq != 0) {
 378                 sfcr_err(sr, "receive queue interrupt not supported");
 379                 ret = -EINVAL;
 380         }
 381
 382         if (conf->intr_conf.rmv != 0) {
 383                 sfcr_err(sr, "remove interrupt not supported");
 384                 ret = -EINVAL;
 385         }
 386
 387         sfcr_info(sr, "done %d", ret);
 388
 389         return ret;
 390 }
 391
 392
 393 static int
 394 sfc_repr_configure(struct sfc_repr *sr, uint16_t nb_rx_queues,
 395                    const struct rte_eth_conf *conf)
 396 {
 397         int ret;
 398
 399         sfcr_info(sr, "entry");
 400
 401         SFC_ASSERT(sfc_repr_lock_is_locked(sr));
 402
 403         ret = sfc_repr_check_conf(sr, nb_rx_queues, conf);
 404         if (ret != 0)
 405                 goto fail_check_conf;
 406
 407         sr->state = SFC_ETHDEV_CONFIGURED;
 408
 409         sfcr_info(sr, "done");
 410
 411         return 0;
 412
 413 fail_check_conf:
 414         sfcr_info(sr, "failed %s", rte_strerror(-ret));
 415         return ret;
 416 }
 417
 418 static int
 419 sfc_repr_dev_configure(struct rte_eth_dev *dev)
 420 {
 421         struct sfc_repr *sr = sfc_repr_by_eth_dev(dev);
 422         struct rte_eth_dev_data *dev_data = dev->data;
 423         int ret;
 424
 425         sfcr_info(sr, "entry n_rxq=%u n_txq=%u",
 426                   dev_data->nb_rx_queues, dev_data->nb_tx_queues);
 427
 428         sfc_repr_lock(sr);
 429         switch (sr->state) {
 430         case SFC_ETHDEV_CONFIGURED:
 431                 /* FALLTHROUGH */
 432         case SFC_ETHDEV_INITIALIZED:
 433                 ret = sfc_repr_configure(sr, dev_data->nb_rx_queues,
 434                                          &dev_data->dev_conf);
 435                 break;
 436         default:
 437                 sfcr_err(sr, "unexpected adapter state %u to configure",
 438                          sr->state);
 439                 ret = -EINVAL;
 440                 break;
 441         }
 442         sfc_repr_unlock(sr);
 443
 444         sfcr_info(sr, "done %s", rte_strerror(-ret));
 445
 446         return ret;
 447 }
 448
 449 static int
 450 sfc_repr_dev_infos_get(struct rte_eth_dev *dev,
 451                        struct rte_eth_dev_info *dev_info)
 452 {
 453         struct sfc_repr_shared *srs = sfc_repr_shared_by_eth_dev(dev);
 454
 455         dev_info->device = dev->device;
 456
 457         dev_info->max_rx_queues = SFC_REPR_RXQ_MAX;
 458         dev_info->max_tx_queues = SFC_REPR_TXQ_MAX;
 459         dev_info->default_rxconf.rx_drop_en = 1;
 460         dev_info->switch_info.domain_id = srs->switch_domain_id;
 461         dev_info->switch_info.port_id = srs->switch_port_id;
 462
 463         return 0;
 464 }
 465
 466 static int
 467 sfc_repr_ring_create(uint16_t pf_port_id, uint16_t repr_id,
 468                      const char *type_name, uint16_t qid, uint16_t nb_desc,
 469                      unsigned int socket_id, struct rte_ring **ring)
 470 {
 471         char ring_name[RTE_RING_NAMESIZE];
 472         int ret;
 473
 474         ret = snprintf(ring_name, sizeof(ring_name), "sfc_%u_repr_%u_%sq%u",
 475                        pf_port_id, repr_id, type_name, qid);
 476         if (ret >= (int)sizeof(ring_name))
 477                 return -ENAMETOOLONG;
 478
 479         /*
 480          * Single producer/consumer rings are used since the API for Tx/Rx
 481          * packet burst for representors are guaranteed to be called from
 482          * a single thread, and the user of the other end (representor proxy)
 483          * is also single-threaded.
 484          */
 485         *ring = rte_ring_create(ring_name, nb_desc, socket_id,
 486                                RING_F_SP_ENQ | RING_F_SC_DEQ);
 487         if (*ring == NULL)
 488                 return -rte_errno;
 489
 490         return 0;
 491 }
 492
 493 static int
 494 sfc_repr_rx_qcheck_conf(struct sfc_repr *sr,
 495                         const struct rte_eth_rxconf *rx_conf)
 496 {
 497         int ret = 0;
 498
 499         sfcr_info(sr, "entry");
 500
 501         if (rx_conf->rx_thresh.pthresh != 0 ||
 502             rx_conf->rx_thresh.hthresh != 0 ||
 503             rx_conf->rx_thresh.wthresh != 0) {
 504                 sfcr_warn(sr,
 505                         "RxQ prefetch/host/writeback thresholds are not supported");
 506         }
 507
 508         if (rx_conf->rx_free_thresh != 0)
 509                 sfcr_warn(sr, "RxQ free threshold is not supported");
 510
 511         if (rx_conf->rx_drop_en == 0)
 512                 sfcr_warn(sr, "RxQ drop disable is not supported");
 513
 514         if (rx_conf->rx_deferred_start) {
 515                 sfcr_err(sr, "Deferred start is not supported");
 516                 ret = -EINVAL;
 517         }
 518
 519         sfcr_info(sr, "done: %s", rte_strerror(-ret));
 520
 521         return ret;
 522 }
 523
 524 static int
 525 sfc_repr_rx_queue_setup(struct rte_eth_dev *dev, uint16_t rx_queue_id,
 526                         uint16_t nb_rx_desc, unsigned int socket_id,
 527                         __rte_unused const struct rte_eth_rxconf *rx_conf,
 528                         struct rte_mempool *mb_pool)
 529 {
 530         struct sfc_repr_shared *srs = sfc_repr_shared_by_eth_dev(dev);
 531         struct sfc_repr *sr = sfc_repr_by_eth_dev(dev);
 532         struct sfc_repr_rxq *rxq;
 533         int ret;
 534
 535         sfcr_info(sr, "entry");
 536
 537         ret = sfc_repr_rx_qcheck_conf(sr, rx_conf);
 538         if (ret != 0)
 539                 goto fail_check_conf;
 540
 541         ret = -ENOMEM;
 542         rxq = rte_zmalloc_socket("sfc-repr-rxq", sizeof(*rxq),
 543                                  RTE_CACHE_LINE_SIZE, socket_id);
 544         if (rxq == NULL) {
 545                 sfcr_err(sr, "%s() failed to alloc RxQ", __func__);
 546                 goto fail_rxq_alloc;
 547         }
 548
 549         ret = sfc_repr_ring_create(srs->pf_port_id, srs->repr_id,
 550                                    "rx", rx_queue_id, nb_rx_desc,
 551                                    socket_id, &rxq->ring);
 552         if (ret != 0) {
 553                 sfcr_err(sr, "%s() failed to create ring", __func__);
 554                 goto fail_ring_create;
 555         }
 556
 557         ret = sfc_repr_proxy_add_rxq(srs->pf_port_id, srs->repr_id,
 558                                      rx_queue_id, rxq->ring, mb_pool);
 559         if (ret != 0) {
 560                 SFC_ASSERT(ret > 0);
 561                 ret = -ret;
 562                 sfcr_err(sr, "%s() failed to add proxy RxQ", __func__);
 563                 goto fail_proxy_add_rxq;
 564         }
 565
 566         dev->data->rx_queues[rx_queue_id] = rxq;
 567
 568         sfcr_info(sr, "done");
 569
 570         return 0;
 571
 572 fail_proxy_add_rxq:
 573         rte_ring_free(rxq->ring);
 574
 575 fail_ring_create:
 576         rte_free(rxq);
 577
 578 fail_rxq_alloc:
 579 fail_check_conf:
 580         sfcr_err(sr, "%s() failed: %s", __func__, rte_strerror(-ret));
 581         return ret;
 582 }
 583
 584 static void
 585 sfc_repr_rx_queue_release(struct rte_eth_dev *dev, uint16_t rx_queue_id)
 586 {
 587         struct sfc_repr_shared *srs = sfc_repr_shared_by_eth_dev(dev);
 588         struct sfc_repr_rxq *rxq = dev->data->rx_queues[rx_queue_id];
 589
 590         sfc_repr_proxy_del_rxq(srs->pf_port_id, srs->repr_id, rx_queue_id);
 591         rte_ring_free(rxq->ring);
 592         rte_free(rxq);
 593 }
 594
 595 static int
 596 sfc_repr_tx_qcheck_conf(struct sfc_repr *sr,
 597                         const struct rte_eth_txconf *tx_conf)
 598 {
 599         int ret = 0;
 600
 601         sfcr_info(sr, "entry");
 602
 603         if (tx_conf->tx_rs_thresh != 0)
 604                 sfcr_warn(sr, "RS bit in transmit descriptor is not supported");
 605
 606         if (tx_conf->tx_free_thresh != 0)
 607                 sfcr_warn(sr, "TxQ free threshold is not supported");
 608
 609         if (tx_conf->tx_thresh.pthresh != 0 ||
 610             tx_conf->tx_thresh.hthresh != 0 ||
 611             tx_conf->tx_thresh.wthresh != 0) {
 612                 sfcr_warn(sr,
 613                         "prefetch/host/writeback thresholds are not supported");
 614         }
 615
 616         if (tx_conf->tx_deferred_start) {
 617                 sfcr_err(sr, "Deferred start is not supported");
 618                 ret = -EINVAL;
 619         }
 620
 621         sfcr_info(sr, "done: %s", rte_strerror(-ret));
 622
 623         return ret;
 624 }
 625
 626 static int
 627 sfc_repr_tx_queue_setup(struct rte_eth_dev *dev, uint16_t tx_queue_id,
 628                         uint16_t nb_tx_desc, unsigned int socket_id,
 629                         const struct rte_eth_txconf *tx_conf)
 630 {
 631         struct sfc_repr_shared *srs = sfc_repr_shared_by_eth_dev(dev);
 632         struct sfc_repr *sr = sfc_repr_by_eth_dev(dev);
 633         struct sfc_repr_txq *txq;
 634         int ret;
 635
 636         sfcr_info(sr, "entry");
 637
 638         ret = sfc_repr_tx_qcheck_conf(sr, tx_conf);
 639         if (ret != 0)
 640                 goto fail_check_conf;
 641
 642         ret = -ENOMEM;
 643         txq = rte_zmalloc_socket("sfc-repr-txq", sizeof(*txq),
 644                                  RTE_CACHE_LINE_SIZE, socket_id);
 645         if (txq == NULL)
 646                 goto fail_txq_alloc;
 647
 648         ret = sfc_repr_ring_create(srs->pf_port_id, srs->repr_id,
 649                                    "tx", tx_queue_id, nb_tx_desc,
 650                                    socket_id, &txq->ring);
 651         if (ret != 0)
 652                 goto fail_ring_create;
 653
 654         ret = sfc_repr_proxy_add_txq(srs->pf_port_id, srs->repr_id,
 655                                      tx_queue_id, txq->ring,
 656                                      &txq->egress_mport);
 657         if (ret != 0)
 658                 goto fail_proxy_add_txq;
 659
 660         dev->data->tx_queues[tx_queue_id] = txq;
 661
 662         sfcr_info(sr, "done");
 663
 664         return 0;
 665
 666 fail_proxy_add_txq:
 667         rte_ring_free(txq->ring);
 668
 669 fail_ring_create:
 670         rte_free(txq);
 671
 672 fail_txq_alloc:
 673 fail_check_conf:
 674         sfcr_err(sr, "%s() failed: %s", __func__, rte_strerror(-ret));
 675         return ret;
 676 }
 677
 678 static void
 679 sfc_repr_tx_queue_release(struct rte_eth_dev *dev, uint16_t tx_queue_id)
 680 {
 681         struct sfc_repr_shared *srs = sfc_repr_shared_by_eth_dev(dev);
 682         struct sfc_repr_txq *txq = dev->data->tx_queues[tx_queue_id];
 683
 684         sfc_repr_proxy_del_txq(srs->pf_port_id, srs->repr_id, tx_queue_id);
 685         rte_ring_free(txq->ring);
 686         rte_free(txq);
 687 }
 688
 689 static void
 690 sfc_repr_close(struct sfc_repr *sr)
 691 {
 692         SFC_ASSERT(sfc_repr_lock_is_locked(sr));
 693
 694         SFC_ASSERT(sr->state == SFC_ETHDEV_CONFIGURED);
 695         sr->state = SFC_ETHDEV_CLOSING;
 696
 697         /* Put representor close actions here */
 698
 699         sr->state = SFC_ETHDEV_INITIALIZED;
 700 }
 701
 702 static int
 703 sfc_repr_dev_close(struct rte_eth_dev *dev)
 704 {
 705         struct sfc_repr *sr = sfc_repr_by_eth_dev(dev);
 706         struct sfc_repr_shared *srs = sfc_repr_shared_by_eth_dev(dev);
 707         unsigned int i;
 708
 709         sfcr_info(sr, "entry");
 710
 711         sfc_repr_lock(sr);
 712         switch (sr->state) {
 713         case SFC_ETHDEV_STARTED:
 714                 sfc_repr_stop(dev);
 715                 SFC_ASSERT(sr->state == SFC_ETHDEV_CONFIGURED);
 716                 /* FALLTHROUGH */
 717         case SFC_ETHDEV_CONFIGURED:
 718                 sfc_repr_close(sr);
 719                 SFC_ASSERT(sr->state == SFC_ETHDEV_INITIALIZED);
 720                 /* FALLTHROUGH */
 721         case SFC_ETHDEV_INITIALIZED:
 722                 break;
 723         default:
 724                 sfcr_err(sr, "unexpected adapter state %u on close", sr->state);
 725                 break;
 726         }
 727
 728         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 729                 sfc_repr_rx_queue_release(dev, i);
 730                 dev->data->rx_queues[i] = NULL;
 731         }
 732
 733         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 734                 sfc_repr_tx_queue_release(dev, i);
 735                 dev->data->tx_queues[i] = NULL;
 736         }
 737
 738         /*
 739          * Cleanup all resources.
 740          * Rollback primary process sfc_repr_eth_dev_init() below.
 741          */
 742
 743         (void)sfc_repr_proxy_del_port(srs->pf_port_id, srs->repr_id);
 744
 745         dev->dev_ops = NULL;
 746
 747         sfc_repr_unlock(sr);
 748         sfc_repr_lock_fini(sr);
 749
 750         sfcr_info(sr, "done");
 751
 752         free(sr);
 753
 754         return 0;
 755 }
 756
 757 static const struct eth_dev_ops sfc_repr_dev_ops = {
 758         .dev_configure                  = sfc_repr_dev_configure,
 759         .dev_start                      = sfc_repr_dev_start,
 760         .dev_stop                       = sfc_repr_dev_stop,
 761         .dev_close                      = sfc_repr_dev_close,
 762         .dev_infos_get                  = sfc_repr_dev_infos_get,
 763         .rx_queue_setup                 = sfc_repr_rx_queue_setup,
 764         .rx_queue_release               = sfc_repr_rx_queue_release,
 765         .tx_queue_setup                 = sfc_repr_tx_queue_setup,
 766         .tx_queue_release               = sfc_repr_tx_queue_release,
 767 };
 768
 769
 770 struct sfc_repr_init_data {
 771         uint16_t                pf_port_id;
 772         uint16_t                repr_id;
 773         uint16_t                switch_domain_id;
 774         efx_mport_sel_t         mport_sel;
 775 };
 776
 777 static int
 778 sfc_repr_assign_mae_switch_port(uint16_t switch_domain_id,
 779                                 const struct sfc_mae_switch_port_request *req,
 780                                 uint16_t *switch_port_id)
 781 {
 782         int rc;
 783
 784         rc = sfc_mae_assign_switch_port(switch_domain_id, req, switch_port_id);
 785
 786         SFC_ASSERT(rc >= 0);
 787         return -rc;
 788 }
 789
 790 static int
 791 sfc_repr_eth_dev_init(struct rte_eth_dev *dev, void *init_params)
 792 {
 793         const struct sfc_repr_init_data *repr_data = init_params;
 794         struct sfc_repr_shared *srs = sfc_repr_shared_by_eth_dev(dev);
 795         struct sfc_mae_switch_port_request switch_port_request;
 796         efx_mport_sel_t ethdev_mport_sel;
 797         struct sfc_repr *sr;
 798         int ret;
 799
 800         /*
 801          * Currently there is no mport we can use for representor's
 802          * ethdev. Use an invalid one for now. This way representors
 803          * can be instantiated.
 804          */
 805         efx_mae_mport_invalid(&ethdev_mport_sel);
 806
 807         memset(&switch_port_request, 0, sizeof(switch_port_request));
 808         switch_port_request.type = SFC_MAE_SWITCH_PORT_REPRESENTOR;
 809         switch_port_request.ethdev_mportp = &ethdev_mport_sel;
 810         switch_port_request.entity_mportp = &repr_data->mport_sel;
 811         switch_port_request.ethdev_port_id = dev->data->port_id;
 812
 813         ret = sfc_repr_assign_mae_switch_port(repr_data->switch_domain_id,
 814                                               &switch_port_request,
 815                                               &srs->switch_port_id);
 816         if (ret != 0) {
 817                 SFC_GENERIC_LOG(ERR,
 818                         "%s() failed to assign MAE switch port (domain id %u)",
 819                         __func__, repr_data->switch_domain_id);
 820                 goto fail_mae_assign_switch_port;
 821         }
 822
 823         ret = sfc_repr_proxy_add_port(repr_data->pf_port_id,
 824                                       repr_data->repr_id,
 825                                       dev->data->port_id,
 826                                       &repr_data->mport_sel);
 827         if (ret != 0) {
 828                 SFC_GENERIC_LOG(ERR, "%s() failed to add repr proxy port",
 829                                 __func__);
 830                 SFC_ASSERT(ret > 0);
 831                 ret = -ret;
 832                 goto fail_create_port;
 833         }
 834
 835         /*
 836          * Allocate process private data from heap, since it should not
 837          * be located in shared memory allocated using rte_malloc() API.
 838          */
 839         sr = calloc(1, sizeof(*sr));
 840         if (sr == NULL) {
 841                 ret = -ENOMEM;
 842                 goto fail_alloc_sr;
 843         }
 844
 845         sfc_repr_lock_init(sr);
 846         sfc_repr_lock(sr);
 847
 848         dev->process_private = sr;
 849
 850         srs->pf_port_id = repr_data->pf_port_id;
 851         srs->repr_id = repr_data->repr_id;
 852         srs->switch_domain_id = repr_data->switch_domain_id;
 853
 854         dev->data->dev_flags |= RTE_ETH_DEV_REPRESENTOR;
 855         dev->data->representor_id = srs->repr_id;
 856         dev->data->backer_port_id = srs->pf_port_id;
 857
 858         dev->data->mac_addrs = rte_zmalloc("sfcr", RTE_ETHER_ADDR_LEN, 0);
 859         if (dev->data->mac_addrs == NULL) {
 860                 ret = -ENOMEM;
 861                 goto fail_mac_addrs;
 862         }
 863
 864         dev->dev_ops = &sfc_repr_dev_ops;
 865
 866         sr->state = SFC_ETHDEV_INITIALIZED;
 867         sfc_repr_unlock(sr);
 868
 869         return 0;
 870
 871 fail_mac_addrs:
 872         sfc_repr_unlock(sr);
 873         free(sr);
 874
 875 fail_alloc_sr:
 876         (void)sfc_repr_proxy_del_port(repr_data->pf_port_id,
 877                                       repr_data->repr_id);
 878
 879 fail_create_port:
 880 fail_mae_assign_switch_port:
 881         SFC_GENERIC_LOG(ERR, "%s() failed: %s", __func__, rte_strerror(-ret));
 882         return ret;
 883 }
 884
 885 int
 886 sfc_repr_create(struct rte_eth_dev *parent, uint16_t representor_id,
 887                 uint16_t switch_domain_id, const efx_mport_sel_t *mport_sel)
 888 {
 889         struct sfc_repr_init_data repr_data;
 890         char name[RTE_ETH_NAME_MAX_LEN];
 891         int ret;
 892
 893         if (snprintf(name, sizeof(name), "net_%s_representor_%u",
 894                      parent->device->name, representor_id) >=
 895                         (int)sizeof(name)) {
 896                 SFC_GENERIC_LOG(ERR, "%s() failed name too long", __func__);
 897                 return -ENAMETOOLONG;
 898         }
 899
 900         memset(&repr_data, 0, sizeof(repr_data));
 901         repr_data.pf_port_id = parent->data->port_id;
 902         repr_data.repr_id = representor_id;
 903         repr_data.switch_domain_id = switch_domain_id;
 904         repr_data.mport_sel = *mport_sel;
 905
 906         ret = rte_eth_dev_create(parent->device, name,
 907                                   sizeof(struct sfc_repr_shared),
 908                                   NULL, NULL,
 909                                   sfc_repr_eth_dev_init, &repr_data);
 910         if (ret != 0)
 911                 SFC_GENERIC_LOG(ERR, "%s() failed to create device", __func__);
 912
 913         SFC_GENERIC_LOG(INFO, "%s() done: %s", __func__, rte_strerror(-ret));
 914
 915         return ret;
 916 }