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
  43
  44 static void
  45 sfc_dev_infos_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
  46 {
  47         struct sfc_adapter *sa = dev->data->dev_private;
  48
  49         sfc_log_init(sa, "entry");
  50
  51         dev_info->pci_dev = RTE_DEV_TO_PCI(dev->device);
  52         dev_info->max_rx_pktlen = EFX_MAC_PDU_MAX;
  53
  54         dev_info->max_rx_queues = sa->rxq_max;
  55         dev_info->max_tx_queues = sa->txq_max;
  56
  57         /* By default packets are dropped if no descriptors are available */
  58         dev_info->default_rxconf.rx_drop_en = 1;
  59
  60         dev_info->tx_offload_capa =
  61                 DEV_TX_OFFLOAD_IPV4_CKSUM |
  62                 DEV_TX_OFFLOAD_UDP_CKSUM |
  63                 DEV_TX_OFFLOAD_TCP_CKSUM;
  64
  65         dev_info->default_txconf.txq_flags = ETH_TXQ_FLAGS_NOVLANOFFL |
  66                                              ETH_TXQ_FLAGS_NOXSUMSCTP;
  67
  68         dev_info->rx_desc_lim.nb_max = EFX_RXQ_MAXNDESCS;
  69         dev_info->rx_desc_lim.nb_min = EFX_RXQ_MINNDESCS;
  70         /* The RXQ hardware requires that the descriptor count is a power
  71          * of 2, but rx_desc_lim cannot properly describe that constraint.
  72          */
  73         dev_info->rx_desc_lim.nb_align = EFX_RXQ_MINNDESCS;
  74
  75         dev_info->tx_desc_lim.nb_max = sa->txq_max_entries;
  76         dev_info->tx_desc_lim.nb_min = EFX_TXQ_MINNDESCS;
  77         /*
  78          * The TXQ hardware requires that the descriptor count is a power
  79          * of 2, but tx_desc_lim cannot properly describe that constraint
  80          */
  81         dev_info->tx_desc_lim.nb_align = EFX_TXQ_MINNDESCS;
  82 }
  83
  84 static int
  85 sfc_dev_configure(struct rte_eth_dev *dev)
  86 {
  87         struct rte_eth_dev_data *dev_data = dev->data;
  88         struct sfc_adapter *sa = dev_data->dev_private;
  89         int rc;
  90
  91         sfc_log_init(sa, "entry n_rxq=%u n_txq=%u",
  92                      dev_data->nb_rx_queues, dev_data->nb_tx_queues);
  93
  94         sfc_adapter_lock(sa);
  95         switch (sa->state) {
  96         case SFC_ADAPTER_CONFIGURED:
  97                 sfc_close(sa);
  98                 SFC_ASSERT(sa->state == SFC_ADAPTER_INITIALIZED);
  99                 /* FALLTHROUGH */
 100         case SFC_ADAPTER_INITIALIZED:
 101                 rc = sfc_configure(sa);
 102                 break;
 103         default:
 104                 sfc_err(sa, "unexpected adapter state %u to configure",
 105                         sa->state);
 106                 rc = EINVAL;
 107                 break;
 108         }
 109         sfc_adapter_unlock(sa);
 110
 111         sfc_log_init(sa, "done %d", rc);
 112         SFC_ASSERT(rc >= 0);
 113         return -rc;
 114 }
 115
 116 static int
 117 sfc_dev_start(struct rte_eth_dev *dev)
 118 {
 119         struct sfc_adapter *sa = dev->data->dev_private;
 120         int rc;
 121
 122         sfc_log_init(sa, "entry");
 123
 124         sfc_adapter_lock(sa);
 125         rc = sfc_start(sa);
 126         sfc_adapter_unlock(sa);
 127
 128         sfc_log_init(sa, "done %d", rc);
 129         SFC_ASSERT(rc >= 0);
 130         return -rc;
 131 }
 132
 133 static int
 134 sfc_dev_link_update(struct rte_eth_dev *dev, int wait_to_complete)
 135 {
 136         struct sfc_adapter *sa = dev->data->dev_private;
 137         struct rte_eth_link *dev_link = &dev->data->dev_link;
 138         struct rte_eth_link old_link;
 139         struct rte_eth_link current_link;
 140
 141         sfc_log_init(sa, "entry");
 142
 143         if (sa->state != SFC_ADAPTER_STARTED)
 144                 return 0;
 145
 146 retry:
 147         EFX_STATIC_ASSERT(sizeof(*dev_link) == sizeof(rte_atomic64_t));
 148         *(int64_t *)&old_link = rte_atomic64_read((rte_atomic64_t *)dev_link);
 149
 150         if (wait_to_complete) {
 151                 efx_link_mode_t link_mode;
 152
 153                 efx_port_poll(sa->nic, &link_mode);
 154                 sfc_port_link_mode_to_info(link_mode, &current_link);
 155
 156                 if (!rte_atomic64_cmpset((volatile uint64_t *)dev_link,
 157                                          *(uint64_t *)&old_link,
 158                                          *(uint64_t *)&current_link))
 159                         goto retry;
 160         } else {
 161                 sfc_ev_mgmt_qpoll(sa);
 162                 *(int64_t *)&current_link =
 163                         rte_atomic64_read((rte_atomic64_t *)dev_link);
 164         }
 165
 166         if (old_link.link_status != current_link.link_status)
 167                 sfc_info(sa, "Link status is %s",
 168                          current_link.link_status ? "UP" : "DOWN");
 169
 170         return old_link.link_status == current_link.link_status ? 0 : -1;
 171 }
 172
 173 static void
 174 sfc_dev_stop(struct rte_eth_dev *dev)
 175 {
 176         struct sfc_adapter *sa = dev->data->dev_private;
 177
 178         sfc_log_init(sa, "entry");
 179
 180         sfc_adapter_lock(sa);
 181         sfc_stop(sa);
 182         sfc_adapter_unlock(sa);
 183
 184         sfc_log_init(sa, "done");
 185 }
 186
 187 static void
 188 sfc_dev_close(struct rte_eth_dev *dev)
 189 {
 190         struct sfc_adapter *sa = dev->data->dev_private;
 191
 192         sfc_log_init(sa, "entry");
 193
 194         sfc_adapter_lock(sa);
 195         switch (sa->state) {
 196         case SFC_ADAPTER_STARTED:
 197                 sfc_stop(sa);
 198                 SFC_ASSERT(sa->state == SFC_ADAPTER_CONFIGURED);
 199                 /* FALLTHROUGH */
 200         case SFC_ADAPTER_CONFIGURED:
 201                 sfc_close(sa);
 202                 SFC_ASSERT(sa->state == SFC_ADAPTER_INITIALIZED);
 203                 /* FALLTHROUGH */
 204         case SFC_ADAPTER_INITIALIZED:
 205                 break;
 206         default:
 207                 sfc_err(sa, "unexpected adapter state %u on close", sa->state);
 208                 break;
 209         }
 210         sfc_adapter_unlock(sa);
 211
 212         sfc_log_init(sa, "done");
 213 }
 214
 215 static int
 216 sfc_rx_queue_setup(struct rte_eth_dev *dev, uint16_t rx_queue_id,
 217                    uint16_t nb_rx_desc, unsigned int socket_id,
 218                    const struct rte_eth_rxconf *rx_conf,
 219                    struct rte_mempool *mb_pool)
 220 {
 221         struct sfc_adapter *sa = dev->data->dev_private;
 222         int rc;
 223
 224         sfc_log_init(sa, "RxQ=%u nb_rx_desc=%u socket_id=%u",
 225                      rx_queue_id, nb_rx_desc, socket_id);
 226
 227         sfc_adapter_lock(sa);
 228
 229         rc = sfc_rx_qinit(sa, rx_queue_id, nb_rx_desc, socket_id,
 230                           rx_conf, mb_pool);
 231         if (rc != 0)
 232                 goto fail_rx_qinit;
 233
 234         dev->data->rx_queues[rx_queue_id] = sa->rxq_info[rx_queue_id].rxq;
 235
 236         sfc_adapter_unlock(sa);
 237
 238         return 0;
 239
 240 fail_rx_qinit:
 241         sfc_adapter_unlock(sa);
 242         SFC_ASSERT(rc > 0);
 243         return -rc;
 244 }
 245
 246 static void
 247 sfc_rx_queue_release(void *queue)
 248 {
 249         struct sfc_rxq *rxq = queue;
 250         struct sfc_adapter *sa;
 251         unsigned int sw_index;
 252
 253         if (rxq == NULL)
 254                 return;
 255
 256         sa = rxq->evq->sa;
 257         sfc_adapter_lock(sa);
 258
 259         sw_index = sfc_rxq_sw_index(rxq);
 260
 261         sfc_log_init(sa, "RxQ=%u", sw_index);
 262
 263         sa->eth_dev->data->rx_queues[sw_index] = NULL;
 264
 265         sfc_rx_qfini(sa, sw_index);
 266
 267         sfc_adapter_unlock(sa);
 268 }
 269
 270 static const struct eth_dev_ops sfc_eth_dev_ops = {
 271         .dev_configure                  = sfc_dev_configure,
 272         .dev_start                      = sfc_dev_start,
 273         .dev_stop                       = sfc_dev_stop,
 274         .dev_close                      = sfc_dev_close,
 275         .link_update                    = sfc_dev_link_update,
 276         .dev_infos_get                  = sfc_dev_infos_get,
 277         .rx_queue_setup                 = sfc_rx_queue_setup,
 278         .rx_queue_release               = sfc_rx_queue_release,
 279 };
 280
 281 static int
 282 sfc_eth_dev_init(struct rte_eth_dev *dev)
 283 {
 284         struct sfc_adapter *sa = dev->data->dev_private;
 285         struct rte_pci_device *pci_dev = SFC_DEV_TO_PCI(dev);
 286         int rc;
 287         const efx_nic_cfg_t *encp;
 288         const struct ether_addr *from;
 289
 290         /* Required for logging */
 291         sa->eth_dev = dev;
 292
 293         /* Copy PCI device info to the dev->data */
 294         rte_eth_copy_pci_info(dev, pci_dev);
 295
 296         rc = sfc_kvargs_parse(sa);
 297         if (rc != 0)
 298                 goto fail_kvargs_parse;
 299
 300         rc = sfc_kvargs_process(sa, SFC_KVARG_DEBUG_INIT,
 301                                 sfc_kvarg_bool_handler, &sa->debug_init);
 302         if (rc != 0)
 303                 goto fail_kvarg_debug_init;
 304
 305         sfc_log_init(sa, "entry");
 306
 307         dev->data->mac_addrs = rte_zmalloc("sfc", ETHER_ADDR_LEN, 0);
 308         if (dev->data->mac_addrs == NULL) {
 309                 rc = ENOMEM;
 310                 goto fail_mac_addrs;
 311         }
 312
 313         sfc_adapter_lock_init(sa);
 314         sfc_adapter_lock(sa);
 315
 316         sfc_log_init(sa, "attaching");
 317         rc = sfc_attach(sa);
 318         if (rc != 0)
 319                 goto fail_attach;
 320
 321         encp = efx_nic_cfg_get(sa->nic);
 322
 323         /*
 324          * The arguments are really reverse order in comparison to
 325          * Linux kernel. Copy from NIC config to Ethernet device data.
 326          */
 327         from = (const struct ether_addr *)(encp->enc_mac_addr);
 328         ether_addr_copy(from, &dev->data->mac_addrs[0]);
 329
 330         dev->dev_ops = &sfc_eth_dev_ops;
 331         dev->rx_pkt_burst = &sfc_recv_pkts;
 332
 333         sfc_adapter_unlock(sa);
 334
 335         sfc_log_init(sa, "done");
 336         return 0;
 337
 338 fail_attach:
 339         sfc_adapter_unlock(sa);
 340         sfc_adapter_lock_fini(sa);
 341         rte_free(dev->data->mac_addrs);
 342         dev->data->mac_addrs = NULL;
 343
 344 fail_mac_addrs:
 345 fail_kvarg_debug_init:
 346         sfc_kvargs_cleanup(sa);
 347
 348 fail_kvargs_parse:
 349         sfc_log_init(sa, "failed %d", rc);
 350         SFC_ASSERT(rc > 0);
 351         return -rc;
 352 }
 353
 354 static int
 355 sfc_eth_dev_uninit(struct rte_eth_dev *dev)
 356 {
 357         struct sfc_adapter *sa = dev->data->dev_private;
 358
 359         sfc_log_init(sa, "entry");
 360
 361         sfc_adapter_lock(sa);
 362
 363         sfc_detach(sa);
 364
 365         rte_free(dev->data->mac_addrs);
 366         dev->data->mac_addrs = NULL;
 367
 368         dev->dev_ops = NULL;
 369         dev->rx_pkt_burst = NULL;
 370
 371         sfc_kvargs_cleanup(sa);
 372
 373         sfc_adapter_unlock(sa);
 374         sfc_adapter_lock_fini(sa);
 375
 376         sfc_log_init(sa, "done");
 377
 378         /* Required for logging, so cleanup last */
 379         sa->eth_dev = NULL;
 380         return 0;
 381 }
 382
 383 static const struct rte_pci_id pci_id_sfc_efx_map[] = {
 384         { RTE_PCI_DEVICE(EFX_PCI_VENID_SFC, EFX_PCI_DEVID_FARMINGDALE) },
 385         { RTE_PCI_DEVICE(EFX_PCI_VENID_SFC, EFX_PCI_DEVID_GREENPORT) },
 386         { RTE_PCI_DEVICE(EFX_PCI_VENID_SFC, EFX_PCI_DEVID_MEDFORD) },
 387         { .vendor_id = 0 /* sentinel */ }
 388 };
 389
 390 static struct eth_driver sfc_efx_pmd = {
 391         .pci_drv = {
 392                 .id_table = pci_id_sfc_efx_map,
 393                 .drv_flags =
 394                         RTE_PCI_DRV_NEED_MAPPING,
 395                 .probe = rte_eth_dev_pci_probe,
 396                 .remove = rte_eth_dev_pci_remove,
 397         },
 398         .eth_dev_init = sfc_eth_dev_init,
 399         .eth_dev_uninit = sfc_eth_dev_uninit,
 400         .dev_private_size = sizeof(struct sfc_adapter),
 401 };
 402
 403 RTE_PMD_REGISTER_PCI(net_sfc_efx, sfc_efx_pmd.pci_drv);
 404 RTE_PMD_REGISTER_PCI_TABLE(net_sfc_efx, pci_id_sfc_efx_map);
 405 RTE_PMD_REGISTER_PARAM_STRING(net_sfc_efx,
 406         SFC_KVARG_DEBUG_INIT "=" SFC_KVARG_VALUES_BOOL);