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 const struct eth_dev_ops sfc_eth_dev_ops = {
 327         .dev_configure                  = sfc_dev_configure,
 328         .dev_start                      = sfc_dev_start,
 329         .dev_stop                       = sfc_dev_stop,
 330         .dev_close                      = sfc_dev_close,
 331         .link_update                    = sfc_dev_link_update,
 332         .dev_infos_get                  = sfc_dev_infos_get,
 333         .rx_queue_setup                 = sfc_rx_queue_setup,
 334         .rx_queue_release               = sfc_rx_queue_release,
 335         .tx_queue_setup                 = sfc_tx_queue_setup,
 336         .tx_queue_release               = sfc_tx_queue_release,
 337 };
 338
 339 static int
 340 sfc_eth_dev_init(struct rte_eth_dev *dev)
 341 {
 342         struct sfc_adapter *sa = dev->data->dev_private;
 343         struct rte_pci_device *pci_dev = SFC_DEV_TO_PCI(dev);
 344         int rc;
 345         const efx_nic_cfg_t *encp;
 346         const struct ether_addr *from;
 347
 348         /* Required for logging */
 349         sa->eth_dev = dev;
 350
 351         /* Copy PCI device info to the dev->data */
 352         rte_eth_copy_pci_info(dev, pci_dev);
 353
 354         rc = sfc_kvargs_parse(sa);
 355         if (rc != 0)
 356                 goto fail_kvargs_parse;
 357
 358         rc = sfc_kvargs_process(sa, SFC_KVARG_DEBUG_INIT,
 359                                 sfc_kvarg_bool_handler, &sa->debug_init);
 360         if (rc != 0)
 361                 goto fail_kvarg_debug_init;
 362
 363         sfc_log_init(sa, "entry");
 364
 365         dev->data->mac_addrs = rte_zmalloc("sfc", ETHER_ADDR_LEN, 0);
 366         if (dev->data->mac_addrs == NULL) {
 367                 rc = ENOMEM;
 368                 goto fail_mac_addrs;
 369         }
 370
 371         sfc_adapter_lock_init(sa);
 372         sfc_adapter_lock(sa);
 373
 374         sfc_log_init(sa, "attaching");
 375         rc = sfc_attach(sa);
 376         if (rc != 0)
 377                 goto fail_attach;
 378
 379         encp = efx_nic_cfg_get(sa->nic);
 380
 381         /*
 382          * The arguments are really reverse order in comparison to
 383          * Linux kernel. Copy from NIC config to Ethernet device data.
 384          */
 385         from = (const struct ether_addr *)(encp->enc_mac_addr);
 386         ether_addr_copy(from, &dev->data->mac_addrs[0]);
 387
 388         dev->dev_ops = &sfc_eth_dev_ops;
 389         dev->rx_pkt_burst = &sfc_recv_pkts;
 390
 391         sfc_adapter_unlock(sa);
 392
 393         sfc_log_init(sa, "done");
 394         return 0;
 395
 396 fail_attach:
 397         sfc_adapter_unlock(sa);
 398         sfc_adapter_lock_fini(sa);
 399         rte_free(dev->data->mac_addrs);
 400         dev->data->mac_addrs = NULL;
 401
 402 fail_mac_addrs:
 403 fail_kvarg_debug_init:
 404         sfc_kvargs_cleanup(sa);
 405
 406 fail_kvargs_parse:
 407         sfc_log_init(sa, "failed %d", rc);
 408         SFC_ASSERT(rc > 0);
 409         return -rc;
 410 }
 411
 412 static int
 413 sfc_eth_dev_uninit(struct rte_eth_dev *dev)
 414 {
 415         struct sfc_adapter *sa = dev->data->dev_private;
 416
 417         sfc_log_init(sa, "entry");
 418
 419         sfc_adapter_lock(sa);
 420
 421         sfc_detach(sa);
 422
 423         rte_free(dev->data->mac_addrs);
 424         dev->data->mac_addrs = NULL;
 425
 426         dev->dev_ops = NULL;
 427         dev->rx_pkt_burst = NULL;
 428
 429         sfc_kvargs_cleanup(sa);
 430
 431         sfc_adapter_unlock(sa);
 432         sfc_adapter_lock_fini(sa);
 433
 434         sfc_log_init(sa, "done");
 435
 436         /* Required for logging, so cleanup last */
 437         sa->eth_dev = NULL;
 438         return 0;
 439 }
 440
 441 static const struct rte_pci_id pci_id_sfc_efx_map[] = {
 442         { RTE_PCI_DEVICE(EFX_PCI_VENID_SFC, EFX_PCI_DEVID_FARMINGDALE) },
 443         { RTE_PCI_DEVICE(EFX_PCI_VENID_SFC, EFX_PCI_DEVID_GREENPORT) },
 444         { RTE_PCI_DEVICE(EFX_PCI_VENID_SFC, EFX_PCI_DEVID_MEDFORD) },
 445         { .vendor_id = 0 /* sentinel */ }
 446 };
 447
 448 static struct eth_driver sfc_efx_pmd = {
 449         .pci_drv = {
 450                 .id_table = pci_id_sfc_efx_map,
 451                 .drv_flags =
 452                         RTE_PCI_DRV_NEED_MAPPING,
 453                 .probe = rte_eth_dev_pci_probe,
 454                 .remove = rte_eth_dev_pci_remove,
 455         },
 456         .eth_dev_init = sfc_eth_dev_init,
 457         .eth_dev_uninit = sfc_eth_dev_uninit,
 458         .dev_private_size = sizeof(struct sfc_adapter),
 459 };
 460
 461 RTE_PMD_REGISTER_PCI(net_sfc_efx, sfc_efx_pmd.pci_drv);
 462 RTE_PMD_REGISTER_PCI_TABLE(net_sfc_efx, pci_id_sfc_efx_map);
 463 RTE_PMD_REGISTER_PARAM_STRING(net_sfc_efx,
 464         SFC_KVARG_DEBUG_INIT "=" SFC_KVARG_VALUES_BOOL);