drivers/net/sfc/sfc_ethdev.c

   1 /*-
   2  * Copyright (c) 2016 Solarflare Communications Inc.
   3  * All rights reserved.
   4  *
   5  * This software was jointly developed between OKTET Labs (under contract
   6  * for Solarflare) and Solarflare Communications, Inc.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright notice,
  12  *    this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright notice,
  14  *    this list of conditions and the following disclaimer in the documentation
  15  *    and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  18  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  19  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  20  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  21  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  22  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  23  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  24  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  25  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  26  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
  27  * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 #include <rte_dev.h>
  31 #include <rte_ethdev.h>
  32 #include <rte_pci.h>
  33
  34 #include "efx.h"
  35
  36 #include "sfc.h"
  37 #include "sfc_debug.h"
  38 #include "sfc_log.h"
  39 #include "sfc_kvargs.h"
  40 #include "sfc_ev.h"
  41 #include "sfc_rx.h"
  42 #include "sfc_tx.h"
  43
  44
  45 static void
  46 sfc_dev_infos_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
  47 {
  48         struct sfc_adapter *sa = dev->data->dev_private;
  49
  50         sfc_log_init(sa, "entry");
  51
  52         dev_info->pci_dev = RTE_DEV_TO_PCI(dev->device);
  53         dev_info->max_rx_pktlen = EFX_MAC_PDU_MAX;
  54
  55         dev_info->max_rx_queues = sa->rxq_max;
  56         dev_info->max_tx_queues = sa->txq_max;
  57
  58         /* By default packets are dropped if no descriptors are available */
  59         dev_info->default_rxconf.rx_drop_en = 1;
  60
  61         dev_info->tx_offload_capa =
  62                 DEV_TX_OFFLOAD_IPV4_CKSUM |
  63                 DEV_TX_OFFLOAD_UDP_CKSUM |
  64                 DEV_TX_OFFLOAD_TCP_CKSUM;
  65
  66         dev_info->default_txconf.txq_flags = ETH_TXQ_FLAGS_NOVLANOFFL |
  67                                              ETH_TXQ_FLAGS_NOXSUMSCTP;
  68
  69         dev_info->rx_desc_lim.nb_max = EFX_RXQ_MAXNDESCS;
  70         dev_info->rx_desc_lim.nb_min = EFX_RXQ_MINNDESCS;
  71         /* The RXQ hardware requires that the descriptor count is a power
  72          * of 2, but rx_desc_lim cannot properly describe that constraint.
  73          */
  74         dev_info->rx_desc_lim.nb_align = EFX_RXQ_MINNDESCS;
  75
  76         dev_info->tx_desc_lim.nb_max = sa->txq_max_entries;
  77         dev_info->tx_desc_lim.nb_min = EFX_TXQ_MINNDESCS;
  78         /*
  79          * The TXQ hardware requires that the descriptor count is a power
  80          * of 2, but tx_desc_lim cannot properly describe that constraint
  81          */
  82         dev_info->tx_desc_lim.nb_align = EFX_TXQ_MINNDESCS;
  83 }
  84
  85 static int
  86 sfc_dev_configure(struct rte_eth_dev *dev)
  87 {
  88         struct rte_eth_dev_data *dev_data = dev->data;
  89         struct sfc_adapter *sa = dev_data->dev_private;
  90         int rc;
  91
  92         sfc_log_init(sa, "entry n_rxq=%u n_txq=%u",
  93                      dev_data->nb_rx_queues, dev_data->nb_tx_queues);
  94
  95         sfc_adapter_lock(sa);
  96         switch (sa->state) {
  97         case SFC_ADAPTER_CONFIGURED:
  98                 sfc_close(sa);
  99                 SFC_ASSERT(sa->state == SFC_ADAPTER_INITIALIZED);
 100                 /* FALLTHROUGH */
 101         case SFC_ADAPTER_INITIALIZED:
 102                 rc = sfc_configure(sa);
 103                 break;
 104         default:
 105                 sfc_err(sa, "unexpected adapter state %u to configure",
 106                         sa->state);
 107                 rc = EINVAL;
 108                 break;
 109         }
 110         sfc_adapter_unlock(sa);
 111
 112         sfc_log_init(sa, "done %d", rc);
 113         SFC_ASSERT(rc >= 0);
 114         return -rc;
 115 }
 116
 117 static int
 118 sfc_dev_start(struct rte_eth_dev *dev)
 119 {
 120         struct sfc_adapter *sa = dev->data->dev_private;
 121         int rc;
 122
 123         sfc_log_init(sa, "entry");
 124
 125         sfc_adapter_lock(sa);
 126         rc = sfc_start(sa);
 127         sfc_adapter_unlock(sa);
 128
 129         sfc_log_init(sa, "done %d", rc);
 130         SFC_ASSERT(rc >= 0);
 131         return -rc;
 132 }
 133
 134 static int
 135 sfc_dev_link_update(struct rte_eth_dev *dev, int wait_to_complete)
 136 {
 137         struct sfc_adapter *sa = dev->data->dev_private;
 138         struct rte_eth_link *dev_link = &dev->data->dev_link;
 139         struct rte_eth_link old_link;
 140         struct rte_eth_link current_link;
 141
 142         sfc_log_init(sa, "entry");
 143
 144         if (sa->state != SFC_ADAPTER_STARTED)
 145                 return 0;
 146
 147 retry:
 148         EFX_STATIC_ASSERT(sizeof(*dev_link) == sizeof(rte_atomic64_t));
 149         *(int64_t *)&old_link = rte_atomic64_read((rte_atomic64_t *)dev_link);
 150
 151         if (wait_to_complete) {
 152                 efx_link_mode_t link_mode;
 153
 154                 efx_port_poll(sa->nic, &link_mode);
 155                 sfc_port_link_mode_to_info(link_mode, &current_link);
 156
 157                 if (!rte_atomic64_cmpset((volatile uint64_t *)dev_link,
 158                                          *(uint64_t *)&old_link,
 159                                          *(uint64_t *)&current_link))
 160                         goto retry;
 161         } else {
 162                 sfc_ev_mgmt_qpoll(sa);
 163                 *(int64_t *)&current_link =
 164                         rte_atomic64_read((rte_atomic64_t *)dev_link);
 165         }
 166
 167         if (old_link.link_status != current_link.link_status)
 168                 sfc_info(sa, "Link status is %s",
 169                          current_link.link_status ? "UP" : "DOWN");
 170
 171         return old_link.link_status == current_link.link_status ? 0 : -1;
 172 }
 173
 174 static void
 175 sfc_dev_stop(struct rte_eth_dev *dev)
 176 {
 177         struct sfc_adapter *sa = dev->data->dev_private;
 178
 179         sfc_log_init(sa, "entry");
 180
 181         sfc_adapter_lock(sa);
 182         sfc_stop(sa);
 183         sfc_adapter_unlock(sa);
 184
 185         sfc_log_init(sa, "done");
 186 }
 187
 188 static void
 189 sfc_dev_close(struct rte_eth_dev *dev)
 190 {
 191         struct sfc_adapter *sa = dev->data->dev_private;
 192
 193         sfc_log_init(sa, "entry");
 194
 195         sfc_adapter_lock(sa);
 196         switch (sa->state) {
 197         case SFC_ADAPTER_STARTED:
 198                 sfc_stop(sa);
 199                 SFC_ASSERT(sa->state == SFC_ADAPTER_CONFIGURED);
 200                 /* FALLTHROUGH */
 201         case SFC_ADAPTER_CONFIGURED:
 202                 sfc_close(sa);
 203                 SFC_ASSERT(sa->state == SFC_ADAPTER_INITIALIZED);
 204                 /* FALLTHROUGH */
 205         case SFC_ADAPTER_INITIALIZED:
 206                 break;
 207         default:
 208                 sfc_err(sa, "unexpected adapter state %u on close", sa->state);
 209                 break;
 210         }
 211         sfc_adapter_unlock(sa);
 212
 213         sfc_log_init(sa, "done");
 214 }
 215
 216 static int
 217 sfc_rx_queue_setup(struct rte_eth_dev *dev, uint16_t rx_queue_id,
 218                    uint16_t nb_rx_desc, unsigned int socket_id,
 219                    const struct rte_eth_rxconf *rx_conf,
 220                    struct rte_mempool *mb_pool)
 221 {
 222         struct sfc_adapter *sa = dev->data->dev_private;
 223         int rc;
 224
 225         sfc_log_init(sa, "RxQ=%u nb_rx_desc=%u socket_id=%u",
 226                      rx_queue_id, nb_rx_desc, socket_id);
 227
 228         sfc_adapter_lock(sa);
 229
 230         rc = sfc_rx_qinit(sa, rx_queue_id, nb_rx_desc, socket_id,
 231                           rx_conf, mb_pool);
 232         if (rc != 0)
 233                 goto fail_rx_qinit;
 234
 235         dev->data->rx_queues[rx_queue_id] = sa->rxq_info[rx_queue_id].rxq;
 236
 237         sfc_adapter_unlock(sa);
 238
 239         return 0;
 240
 241 fail_rx_qinit:
 242         sfc_adapter_unlock(sa);
 243         SFC_ASSERT(rc > 0);
 244         return -rc;
 245 }
 246
 247 static void
 248 sfc_rx_queue_release(void *queue)
 249 {
 250         struct sfc_rxq *rxq = queue;
 251         struct sfc_adapter *sa;
 252         unsigned int sw_index;
 253
 254         if (rxq == NULL)
 255                 return;
 256
 257         sa = rxq->evq->sa;
 258         sfc_adapter_lock(sa);
 259
 260         sw_index = sfc_rxq_sw_index(rxq);
 261
 262         sfc_log_init(sa, "RxQ=%u", sw_index);
 263
 264         sa->eth_dev->data->rx_queues[sw_index] = NULL;
 265
 266         sfc_rx_qfini(sa, sw_index);
 267
 268         sfc_adapter_unlock(sa);
 269 }
 270
 271 static int
 272 sfc_tx_queue_setup(struct rte_eth_dev *dev, uint16_t tx_queue_id,
 273                    uint16_t nb_tx_desc, unsigned int socket_id,
 274                    const struct rte_eth_txconf *tx_conf)
 275 {
 276         struct sfc_adapter *sa = dev->data->dev_private;
 277         int rc;
 278
 279         sfc_log_init(sa, "TxQ = %u, nb_tx_desc = %u, socket_id = %u",
 280                      tx_queue_id, nb_tx_desc, socket_id);
 281
 282         sfc_adapter_lock(sa);
 283
 284         rc = sfc_tx_qinit(sa, tx_queue_id, nb_tx_desc, socket_id, tx_conf);
 285         if (rc != 0)
 286                 goto fail_tx_qinit;
 287
 288         dev->data->tx_queues[tx_queue_id] = sa->txq_info[tx_queue_id].txq;
 289
 290         sfc_adapter_unlock(sa);
 291         return 0;
 292
 293 fail_tx_qinit:
 294         sfc_adapter_unlock(sa);
 295         SFC_ASSERT(rc > 0);
 296         return -rc;
 297 }
 298
 299 static void
 300 sfc_tx_queue_release(void *queue)
 301 {
 302         struct sfc_txq *txq = queue;
 303         unsigned int sw_index;
 304         struct sfc_adapter *sa;
 305
 306         if (txq == NULL)
 307                 return;
 308
 309         sw_index = sfc_txq_sw_index(txq);
 310
 311         SFC_ASSERT(txq->evq != NULL);
 312         sa = txq->evq->sa;
 313
 314         sfc_log_init(sa, "TxQ = %u", sw_index);
 315
 316         sfc_adapter_lock(sa);
 317
 318         SFC_ASSERT(sw_index < sa->eth_dev->data->nb_tx_queues);
 319         sa->eth_dev->data->tx_queues[sw_index] = NULL;
 320
 321         sfc_tx_qfini(sa, sw_index);
 322
 323         sfc_adapter_unlock(sa);
 324 }
 325
 326 static void
 327 sfc_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 328 {
 329         struct sfc_adapter *sa = dev->data->dev_private;
 330         struct sfc_port *port = &sa->port;
 331         uint64_t *mac_stats;
 332
 333         rte_spinlock_lock(&port->mac_stats_lock);
 334
 335         if (sfc_port_update_mac_stats(sa) != 0)
 336                 goto unlock;
 337
 338         mac_stats = port->mac_stats_buf;
 339
 340         if (EFX_MAC_STAT_SUPPORTED(port->mac_stats_mask,
 341                                    EFX_MAC_VADAPTER_RX_UNICAST_PACKETS)) {
 342                 stats->ipackets =
 343                         mac_stats[EFX_MAC_VADAPTER_RX_UNICAST_PACKETS] +
 344                         mac_stats[EFX_MAC_VADAPTER_RX_MULTICAST_PACKETS] +
 345                         mac_stats[EFX_MAC_VADAPTER_RX_BROADCAST_PACKETS];
 346                 stats->opackets =
 347                         mac_stats[EFX_MAC_VADAPTER_TX_UNICAST_PACKETS] +
 348                         mac_stats[EFX_MAC_VADAPTER_TX_MULTICAST_PACKETS] +
 349                         mac_stats[EFX_MAC_VADAPTER_TX_BROADCAST_PACKETS];
 350                 stats->ibytes =
 351                         mac_stats[EFX_MAC_VADAPTER_RX_UNICAST_BYTES] +
 352                         mac_stats[EFX_MAC_VADAPTER_RX_MULTICAST_BYTES] +
 353                         mac_stats[EFX_MAC_VADAPTER_RX_BROADCAST_BYTES];
 354                 stats->obytes =
 355                         mac_stats[EFX_MAC_VADAPTER_TX_UNICAST_BYTES] +
 356                         mac_stats[EFX_MAC_VADAPTER_TX_MULTICAST_BYTES] +
 357                         mac_stats[EFX_MAC_VADAPTER_TX_BROADCAST_BYTES];
 358                 stats->imissed = mac_stats[EFX_MAC_VADAPTER_RX_OVERFLOW];
 359                 stats->ierrors = mac_stats[EFX_MAC_VADAPTER_RX_BAD_PACKETS];
 360                 stats->oerrors = mac_stats[EFX_MAC_VADAPTER_TX_BAD_PACKETS];
 361         } else {
 362                 stats->ipackets = mac_stats[EFX_MAC_RX_PKTS];
 363                 stats->opackets = mac_stats[EFX_MAC_TX_PKTS];
 364                 stats->ibytes = mac_stats[EFX_MAC_RX_OCTETS];
 365                 stats->obytes = mac_stats[EFX_MAC_TX_OCTETS];
 366                 /*
 367                  * Take into account stats which are whenever supported
 368                  * on EF10. If some stat is not supported by current
 369                  * firmware variant or HW revision, it is guaranteed
 370                  * to be zero in mac_stats.
 371                  */
 372                 stats->imissed =
 373                         mac_stats[EFX_MAC_RX_NODESC_DROP_CNT] +
 374                         mac_stats[EFX_MAC_PM_TRUNC_BB_OVERFLOW] +
 375                         mac_stats[EFX_MAC_PM_DISCARD_BB_OVERFLOW] +
 376                         mac_stats[EFX_MAC_PM_TRUNC_VFIFO_FULL] +
 377                         mac_stats[EFX_MAC_PM_DISCARD_VFIFO_FULL] +
 378                         mac_stats[EFX_MAC_PM_TRUNC_QBB] +
 379                         mac_stats[EFX_MAC_PM_DISCARD_QBB] +
 380                         mac_stats[EFX_MAC_PM_DISCARD_MAPPING] +
 381                         mac_stats[EFX_MAC_RXDP_Q_DISABLED_PKTS] +
 382                         mac_stats[EFX_MAC_RXDP_DI_DROPPED_PKTS];
 383                 stats->ierrors =
 384                         mac_stats[EFX_MAC_RX_FCS_ERRORS] +
 385                         mac_stats[EFX_MAC_RX_ALIGN_ERRORS] +
 386                         mac_stats[EFX_MAC_RX_JABBER_PKTS];
 387                 /* no oerrors counters supported on EF10 */
 388         }
 389
 390 unlock:
 391         rte_spinlock_unlock(&port->mac_stats_lock);
 392 }
 393
 394 static const struct eth_dev_ops sfc_eth_dev_ops = {
 395         .dev_configure                  = sfc_dev_configure,
 396         .dev_start                      = sfc_dev_start,
 397         .dev_stop                       = sfc_dev_stop,
 398         .dev_close                      = sfc_dev_close,
 399         .link_update                    = sfc_dev_link_update,
 400         .stats_get                      = sfc_stats_get,
 401         .dev_infos_get                  = sfc_dev_infos_get,
 402         .rx_queue_setup                 = sfc_rx_queue_setup,
 403         .rx_queue_release               = sfc_rx_queue_release,
 404         .tx_queue_setup                 = sfc_tx_queue_setup,
 405         .tx_queue_release               = sfc_tx_queue_release,
 406 };
 407
 408 static int
 409 sfc_eth_dev_init(struct rte_eth_dev *dev)
 410 {
 411         struct sfc_adapter *sa = dev->data->dev_private;
 412         struct rte_pci_device *pci_dev = SFC_DEV_TO_PCI(dev);
 413         int rc;
 414         const efx_nic_cfg_t *encp;
 415         const struct ether_addr *from;
 416
 417         /* Required for logging */
 418         sa->eth_dev = dev;
 419
 420         /* Copy PCI device info to the dev->data */
 421         rte_eth_copy_pci_info(dev, pci_dev);
 422
 423         rc = sfc_kvargs_parse(sa);
 424         if (rc != 0)
 425                 goto fail_kvargs_parse;
 426
 427         rc = sfc_kvargs_process(sa, SFC_KVARG_DEBUG_INIT,
 428                                 sfc_kvarg_bool_handler, &sa->debug_init);
 429         if (rc != 0)
 430                 goto fail_kvarg_debug_init;
 431
 432         sfc_log_init(sa, "entry");
 433
 434         dev->data->mac_addrs = rte_zmalloc("sfc", ETHER_ADDR_LEN, 0);
 435         if (dev->data->mac_addrs == NULL) {
 436                 rc = ENOMEM;
 437                 goto fail_mac_addrs;
 438         }
 439
 440         sfc_adapter_lock_init(sa);
 441         sfc_adapter_lock(sa);
 442
 443         sfc_log_init(sa, "attaching");
 444         rc = sfc_attach(sa);
 445         if (rc != 0)
 446                 goto fail_attach;
 447
 448         encp = efx_nic_cfg_get(sa->nic);
 449
 450         /*
 451          * The arguments are really reverse order in comparison to
 452          * Linux kernel. Copy from NIC config to Ethernet device data.
 453          */
 454         from = (const struct ether_addr *)(encp->enc_mac_addr);
 455         ether_addr_copy(from, &dev->data->mac_addrs[0]);
 456
 457         dev->dev_ops = &sfc_eth_dev_ops;
 458         dev->rx_pkt_burst = &sfc_recv_pkts;
 459         dev->tx_pkt_burst = &sfc_xmit_pkts;
 460
 461         sfc_adapter_unlock(sa);
 462
 463         sfc_log_init(sa, "done");
 464         return 0;
 465
 466 fail_attach:
 467         sfc_adapter_unlock(sa);
 468         sfc_adapter_lock_fini(sa);
 469         rte_free(dev->data->mac_addrs);
 470         dev->data->mac_addrs = NULL;
 471
 472 fail_mac_addrs:
 473 fail_kvarg_debug_init:
 474         sfc_kvargs_cleanup(sa);
 475
 476 fail_kvargs_parse:
 477         sfc_log_init(sa, "failed %d", rc);
 478         SFC_ASSERT(rc > 0);
 479         return -rc;
 480 }
 481
 482 static int
 483 sfc_eth_dev_uninit(struct rte_eth_dev *dev)
 484 {
 485         struct sfc_adapter *sa = dev->data->dev_private;
 486
 487         sfc_log_init(sa, "entry");
 488
 489         sfc_adapter_lock(sa);
 490
 491         sfc_detach(sa);
 492
 493         rte_free(dev->data->mac_addrs);
 494         dev->data->mac_addrs = NULL;
 495
 496         dev->dev_ops = NULL;
 497         dev->rx_pkt_burst = NULL;
 498         dev->tx_pkt_burst = NULL;
 499
 500         sfc_kvargs_cleanup(sa);
 501
 502         sfc_adapter_unlock(sa);
 503         sfc_adapter_lock_fini(sa);
 504
 505         sfc_log_init(sa, "done");
 506
 507         /* Required for logging, so cleanup last */
 508         sa->eth_dev = NULL;
 509         return 0;
 510 }
 511
 512 static const struct rte_pci_id pci_id_sfc_efx_map[] = {
 513         { RTE_PCI_DEVICE(EFX_PCI_VENID_SFC, EFX_PCI_DEVID_FARMINGDALE) },
 514         { RTE_PCI_DEVICE(EFX_PCI_VENID_SFC, EFX_PCI_DEVID_GREENPORT) },
 515         { RTE_PCI_DEVICE(EFX_PCI_VENID_SFC, EFX_PCI_DEVID_MEDFORD) },
 516         { .vendor_id = 0 /* sentinel */ }
 517 };
 518
 519 static struct eth_driver sfc_efx_pmd = {
 520         .pci_drv = {
 521                 .id_table = pci_id_sfc_efx_map,
 522                 .drv_flags =
 523                         RTE_PCI_DRV_NEED_MAPPING,
 524                 .probe = rte_eth_dev_pci_probe,
 525                 .remove = rte_eth_dev_pci_remove,
 526         },
 527         .eth_dev_init = sfc_eth_dev_init,
 528         .eth_dev_uninit = sfc_eth_dev_uninit,
 529         .dev_private_size = sizeof(struct sfc_adapter),
 530 };
 531
 532 RTE_PMD_REGISTER_PCI(net_sfc_efx, sfc_efx_pmd.pci_drv);
 533 RTE_PMD_REGISTER_PCI_TABLE(net_sfc_efx, pci_id_sfc_efx_map);
 534 RTE_PMD_REGISTER_PARAM_STRING(net_sfc_efx,
 535         SFC_KVARG_PERF_PROFILE "=" SFC_KVARG_VALUES_PERF_PROFILE " "
 536         SFC_KVARG_MCDI_LOGGING "=" SFC_KVARG_VALUES_BOOL " "
 537         SFC_KVARG_DEBUG_INIT "=" SFC_KVARG_VALUES_BOOL);