drivers/net/sfc/sfc_port.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  * Copyright (c) 2016-2017 Solarflare Communications Inc.
   5  * All rights reserved.
   6  *
   7  * This software was jointly developed between OKTET Labs (under contract
   8  * for Solarflare) and Solarflare Communications, Inc.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions are met:
  12  *
  13  * 1. Redistributions of source code must retain the above copyright notice,
  14  *    this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright notice,
  16  *    this list of conditions and the following disclaimer in the documentation
  17  *    and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  20  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  21  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  23  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  24  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  25  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  26  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  27  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  28  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
  29  * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include "efx.h"
  33
  34 #include "sfc.h"
  35 #include "sfc_log.h"
  36 #include "sfc_kvargs.h"
  37
  38 /** Default MAC statistics update period is 1 second */
  39 #define SFC_MAC_STATS_UPDATE_PERIOD_MS_DEF      MS_PER_S
  40
  41 /** The number of microseconds to sleep on attempt to get statistics update */
  42 #define SFC_MAC_STATS_UPDATE_RETRY_INTERVAL_US  10
  43
  44 /** The number of attempts to await arrival of freshly generated statistics */
  45 #define SFC_MAC_STATS_UPDATE_NB_ATTEMPTS        50
  46
  47 /**
  48  * Update MAC statistics in the buffer.
  49  *
  50  * @param       sa      Adapter
  51  *
  52  * @return Status code
  53  * @retval      0       Success
  54  * @retval      EAGAIN  Try again
  55  * @retval      ENOMEM  Memory allocation failure
  56  */
  57 int
  58 sfc_port_update_mac_stats(struct sfc_adapter *sa)
  59 {
  60         struct sfc_port *port = &sa->port;
  61         efsys_mem_t *esmp = &port->mac_stats_dma_mem;
  62         uint32_t *genp = NULL;
  63         uint32_t gen_old;
  64         unsigned int nb_attempts = 0;
  65         int rc;
  66
  67         SFC_ASSERT(rte_spinlock_is_locked(&port->mac_stats_lock));
  68
  69         if (sa->state != SFC_ADAPTER_STARTED)
  70                 return EINVAL;
  71
  72         /*
  73          * If periodic statistics DMA'ing is off or if not supported,
  74          * make a manual request and keep an eye on timer if need be
  75          */
  76         if (!port->mac_stats_periodic_dma_supported ||
  77             (port->mac_stats_update_period_ms == 0)) {
  78                 if (port->mac_stats_update_period_ms != 0) {
  79                         uint64_t timestamp = sfc_get_system_msecs();
  80
  81                         if ((timestamp -
  82                              port->mac_stats_last_request_timestamp) <
  83                             port->mac_stats_update_period_ms)
  84                                 return 0;
  85
  86                         port->mac_stats_last_request_timestamp = timestamp;
  87                 }
  88
  89                 rc = efx_mac_stats_upload(sa->nic, esmp);
  90                 if (rc != 0)
  91                         return rc;
  92
  93                 genp = &port->mac_stats_update_generation;
  94                 gen_old = *genp;
  95         }
  96
  97         do {
  98                 if (nb_attempts > 0)
  99                         rte_delay_us(SFC_MAC_STATS_UPDATE_RETRY_INTERVAL_US);
 100
 101                 rc = efx_mac_stats_update(sa->nic, esmp,
 102                                           port->mac_stats_buf, genp);
 103                 if (rc != 0)
 104                         return rc;
 105
 106         } while ((genp != NULL) && (*genp == gen_old) &&
 107                  (++nb_attempts < SFC_MAC_STATS_UPDATE_NB_ATTEMPTS));
 108
 109         return 0;
 110 }
 111
 112 int
 113 sfc_port_reset_mac_stats(struct sfc_adapter *sa)
 114 {
 115         struct sfc_port *port = &sa->port;
 116         int rc;
 117
 118         rte_spinlock_lock(&port->mac_stats_lock);
 119         rc = efx_mac_stats_clear(sa->nic);
 120         rte_spinlock_unlock(&port->mac_stats_lock);
 121
 122         return rc;
 123 }
 124
 125 static int
 126 sfc_port_init_dev_link(struct sfc_adapter *sa)
 127 {
 128         struct rte_eth_link *dev_link = &sa->eth_dev->data->dev_link;
 129         int rc;
 130         efx_link_mode_t link_mode;
 131         struct rte_eth_link current_link;
 132
 133         rc = efx_port_poll(sa->nic, &link_mode);
 134         if (rc != 0)
 135                 return rc;
 136
 137         sfc_port_link_mode_to_info(link_mode, &current_link);
 138
 139         EFX_STATIC_ASSERT(sizeof(*dev_link) == sizeof(rte_atomic64_t));
 140         rte_atomic64_set((rte_atomic64_t *)dev_link,
 141                          *(uint64_t *)&current_link);
 142
 143         return 0;
 144 }
 145
 146 int
 147 sfc_port_start(struct sfc_adapter *sa)
 148 {
 149         struct sfc_port *port = &sa->port;
 150         int rc;
 151         uint32_t phy_adv_cap;
 152         const uint32_t phy_pause_caps =
 153                 ((1u << EFX_PHY_CAP_PAUSE) | (1u << EFX_PHY_CAP_ASYM));
 154
 155         sfc_log_init(sa, "entry");
 156
 157         sfc_log_init(sa, "init filters");
 158         rc = efx_filter_init(sa->nic);
 159         if (rc != 0)
 160                 goto fail_filter_init;
 161
 162         sfc_log_init(sa, "init port");
 163         rc = efx_port_init(sa->nic);
 164         if (rc != 0)
 165                 goto fail_port_init;
 166
 167         sfc_log_init(sa, "set flow control to %#x autoneg=%u",
 168                      port->flow_ctrl, port->flow_ctrl_autoneg);
 169         rc = efx_mac_fcntl_set(sa->nic, port->flow_ctrl,
 170                                port->flow_ctrl_autoneg);
 171         if (rc != 0)
 172                 goto fail_mac_fcntl_set;
 173
 174         /* Preserve pause capabilities set by above efx_mac_fcntl_set()  */
 175         efx_phy_adv_cap_get(sa->nic, EFX_PHY_CAP_CURRENT, &phy_adv_cap);
 176         SFC_ASSERT((port->phy_adv_cap & phy_pause_caps) == 0);
 177         phy_adv_cap = port->phy_adv_cap | (phy_adv_cap & phy_pause_caps);
 178
 179         sfc_log_init(sa, "set phy adv caps to %#x", phy_adv_cap);
 180         rc = efx_phy_adv_cap_set(sa->nic, phy_adv_cap);
 181         if (rc != 0)
 182                 goto fail_phy_adv_cap_set;
 183
 184         sfc_log_init(sa, "set MAC PDU %u", (unsigned int)port->pdu);
 185         rc = efx_mac_pdu_set(sa->nic, port->pdu);
 186         if (rc != 0)
 187                 goto fail_mac_pdu_set;
 188
 189         sfc_log_init(sa, "set MAC address");
 190         rc = efx_mac_addr_set(sa->nic,
 191                               sa->eth_dev->data->mac_addrs[0].addr_bytes);
 192         if (rc != 0)
 193                 goto fail_mac_addr_set;
 194
 195         sfc_log_init(sa, "set MAC filters");
 196         port->promisc = (sa->eth_dev->data->promiscuous != 0) ?
 197                         B_TRUE : B_FALSE;
 198         port->allmulti = (sa->eth_dev->data->all_multicast != 0) ?
 199                          B_TRUE : B_FALSE;
 200         rc = sfc_set_rx_mode(sa);
 201         if (rc != 0)
 202                 goto fail_mac_filter_set;
 203
 204         sfc_log_init(sa, "set multicast address list");
 205         rc = efx_mac_multicast_list_set(sa->nic, port->mcast_addrs,
 206                                         port->nb_mcast_addrs);
 207         if (rc != 0)
 208                 goto fail_mcast_address_list_set;
 209
 210         if (port->mac_stats_reset_pending) {
 211                 rc = sfc_port_reset_mac_stats(sa);
 212                 if (rc != 0)
 213                         sfc_err(sa, "statistics reset failed (requested "
 214                                     "before the port was started)");
 215
 216                 port->mac_stats_reset_pending = B_FALSE;
 217         }
 218
 219         efx_mac_stats_get_mask(sa->nic, port->mac_stats_mask,
 220                                sizeof(port->mac_stats_mask));
 221
 222         port->mac_stats_update_generation = 0;
 223
 224         if (port->mac_stats_update_period_ms != 0) {
 225                 /*
 226                  * Update MAC stats using periodic DMA;
 227                  * any positive update interval different from
 228                  * 1000 ms can be set only on SFN8xxx provided
 229                  * that FW version is 6.2.1.1033 or higher
 230                  */
 231                 sfc_log_init(sa, "request MAC stats DMA'ing");
 232                 rc = efx_mac_stats_periodic(sa->nic, &port->mac_stats_dma_mem,
 233                                             port->mac_stats_update_period_ms,
 234                                             B_FALSE);
 235                 if (rc == 0) {
 236                         port->mac_stats_periodic_dma_supported = B_TRUE;
 237                 } else if (rc == EOPNOTSUPP) {
 238                         port->mac_stats_periodic_dma_supported = B_FALSE;
 239                         port->mac_stats_last_request_timestamp = 0;
 240                 } else {
 241                         goto fail_mac_stats_periodic;
 242                 }
 243         }
 244
 245         if ((port->mac_stats_update_period_ms != 0) &&
 246             port->mac_stats_periodic_dma_supported) {
 247                 /*
 248                  * Request an explicit MAC stats upload immediately to
 249                  * preclude bogus figures readback if the user decides
 250                  * to read stats before periodic DMA is really started
 251                  */
 252                 rc = efx_mac_stats_upload(sa->nic, &port->mac_stats_dma_mem);
 253                 if (rc != 0)
 254                         goto fail_mac_stats_upload;
 255         }
 256
 257         sfc_log_init(sa, "disable MAC drain");
 258         rc = efx_mac_drain(sa->nic, B_FALSE);
 259         if (rc != 0)
 260                 goto fail_mac_drain;
 261
 262         /* Synchronize link status knowledge */
 263         rc = sfc_port_init_dev_link(sa);
 264         if (rc != 0)
 265                 goto fail_port_init_dev_link;
 266
 267         sfc_log_init(sa, "done");
 268         return 0;
 269
 270 fail_port_init_dev_link:
 271         (void)efx_mac_drain(sa->nic, B_TRUE);
 272
 273 fail_mac_drain:
 274         (void)efx_mac_stats_periodic(sa->nic, &port->mac_stats_dma_mem,
 275                                      0, B_FALSE);
 276
 277 fail_mac_stats_upload:
 278 fail_mac_stats_periodic:
 279 fail_mcast_address_list_set:
 280 fail_mac_filter_set:
 281 fail_mac_addr_set:
 282 fail_mac_pdu_set:
 283 fail_phy_adv_cap_set:
 284 fail_mac_fcntl_set:
 285         efx_port_fini(sa->nic);
 286
 287 fail_port_init:
 288         efx_filter_fini(sa->nic);
 289
 290 fail_filter_init:
 291         sfc_log_init(sa, "failed %d", rc);
 292         return rc;
 293 }
 294
 295 void
 296 sfc_port_stop(struct sfc_adapter *sa)
 297 {
 298         sfc_log_init(sa, "entry");
 299
 300         efx_mac_drain(sa->nic, B_TRUE);
 301
 302         (void)efx_mac_stats_periodic(sa->nic, &sa->port.mac_stats_dma_mem,
 303                                      0, B_FALSE);
 304
 305         efx_port_fini(sa->nic);
 306         efx_filter_fini(sa->nic);
 307
 308         sfc_log_init(sa, "done");
 309 }
 310
 311 int
 312 sfc_port_configure(struct sfc_adapter *sa)
 313 {
 314         const struct rte_eth_dev_data *dev_data = sa->eth_dev->data;
 315         struct sfc_port *port = &sa->port;
 316
 317         sfc_log_init(sa, "entry");
 318
 319         if (dev_data->dev_conf.rxmode.jumbo_frame)
 320                 port->pdu = dev_data->dev_conf.rxmode.max_rx_pkt_len;
 321         else
 322                 port->pdu = EFX_MAC_PDU(dev_data->mtu);
 323
 324         return 0;
 325 }
 326
 327 void
 328 sfc_port_close(struct sfc_adapter *sa)
 329 {
 330         sfc_log_init(sa, "entry");
 331 }
 332
 333 int
 334 sfc_port_attach(struct sfc_adapter *sa)
 335 {
 336         struct sfc_port *port = &sa->port;
 337         long kvarg_stats_update_period_ms;
 338         int rc;
 339
 340         sfc_log_init(sa, "entry");
 341
 342         efx_phy_adv_cap_get(sa->nic, EFX_PHY_CAP_PERM, &port->phy_adv_cap_mask);
 343
 344         /* Enable flow control by default */
 345         port->flow_ctrl = EFX_FCNTL_RESPOND | EFX_FCNTL_GENERATE;
 346         port->flow_ctrl_autoneg = B_TRUE;
 347
 348         port->max_mcast_addrs = EFX_MAC_MULTICAST_LIST_MAX;
 349         port->nb_mcast_addrs = 0;
 350         port->mcast_addrs = rte_calloc_socket("mcast_addr_list_buf",
 351                                               port->max_mcast_addrs,
 352                                               EFX_MAC_ADDR_LEN, 0,
 353                                               sa->socket_id);
 354         if (port->mcast_addrs == NULL) {
 355                 rc = ENOMEM;
 356                 goto fail_mcast_addr_list_buf_alloc;
 357         }
 358
 359         rte_spinlock_init(&port->mac_stats_lock);
 360
 361         rc = ENOMEM;
 362         port->mac_stats_buf = rte_calloc_socket("mac_stats_buf", EFX_MAC_NSTATS,
 363                                                 sizeof(uint64_t), 0,
 364                                                 sa->socket_id);
 365         if (port->mac_stats_buf == NULL)
 366                 goto fail_mac_stats_buf_alloc;
 367
 368         rc = sfc_dma_alloc(sa, "mac_stats", 0, EFX_MAC_STATS_SIZE,
 369                            sa->socket_id, &port->mac_stats_dma_mem);
 370         if (rc != 0)
 371                 goto fail_mac_stats_dma_alloc;
 372
 373         port->mac_stats_reset_pending = B_FALSE;
 374
 375         kvarg_stats_update_period_ms = SFC_MAC_STATS_UPDATE_PERIOD_MS_DEF;
 376
 377         rc = sfc_kvargs_process(sa, SFC_KVARG_STATS_UPDATE_PERIOD_MS,
 378                                 sfc_kvarg_long_handler,
 379                                 &kvarg_stats_update_period_ms);
 380         if ((rc == 0) &&
 381             ((kvarg_stats_update_period_ms < 0) ||
 382              (kvarg_stats_update_period_ms > UINT16_MAX))) {
 383                 sfc_err(sa, "wrong '" SFC_KVARG_STATS_UPDATE_PERIOD_MS "' "
 384                             "was set (%ld);", kvarg_stats_update_period_ms);
 385                 sfc_err(sa, "it must not be less than 0 "
 386                             "or greater than %" PRIu16, UINT16_MAX);
 387                 rc = EINVAL;
 388                 goto fail_kvarg_stats_update_period_ms;
 389         } else if (rc != 0) {
 390                 goto fail_kvarg_stats_update_period_ms;
 391         }
 392
 393         port->mac_stats_update_period_ms = kvarg_stats_update_period_ms;
 394
 395         sfc_log_init(sa, "done");
 396         return 0;
 397
 398 fail_kvarg_stats_update_period_ms:
 399 fail_mac_stats_dma_alloc:
 400         rte_free(port->mac_stats_buf);
 401 fail_mac_stats_buf_alloc:
 402 fail_mcast_addr_list_buf_alloc:
 403         sfc_log_init(sa, "failed %d", rc);
 404         return rc;
 405 }
 406
 407 void
 408 sfc_port_detach(struct sfc_adapter *sa)
 409 {
 410         struct sfc_port *port = &sa->port;
 411
 412         sfc_log_init(sa, "entry");
 413
 414         sfc_dma_free(sa, &port->mac_stats_dma_mem);
 415         rte_free(port->mac_stats_buf);
 416
 417         sfc_log_init(sa, "done");
 418 }
 419
 420 int
 421 sfc_set_rx_mode(struct sfc_adapter *sa)
 422 {
 423         struct sfc_port *port = &sa->port;
 424         int rc;
 425
 426         rc = efx_mac_filter_set(sa->nic, port->promisc, B_TRUE,
 427                                 port->promisc || port->allmulti, B_TRUE);
 428
 429         return rc;
 430 }
 431
 432 void
 433 sfc_port_link_mode_to_info(efx_link_mode_t link_mode,
 434                            struct rte_eth_link *link_info)
 435 {
 436         SFC_ASSERT(link_mode < EFX_LINK_NMODES);
 437
 438         memset(link_info, 0, sizeof(*link_info));
 439         if ((link_mode == EFX_LINK_DOWN) || (link_mode == EFX_LINK_UNKNOWN))
 440                 link_info->link_status = ETH_LINK_DOWN;
 441         else
 442                 link_info->link_status = ETH_LINK_UP;
 443
 444         switch (link_mode) {
 445         case EFX_LINK_10HDX:
 446                 link_info->link_speed  = ETH_SPEED_NUM_10M;
 447                 link_info->link_duplex = ETH_LINK_HALF_DUPLEX;
 448                 break;
 449         case EFX_LINK_10FDX:
 450                 link_info->link_speed  = ETH_SPEED_NUM_10M;
 451                 link_info->link_duplex = ETH_LINK_FULL_DUPLEX;
 452                 break;
 453         case EFX_LINK_100HDX:
 454                 link_info->link_speed  = ETH_SPEED_NUM_100M;
 455                 link_info->link_duplex = ETH_LINK_HALF_DUPLEX;
 456                 break;
 457         case EFX_LINK_100FDX:
 458                 link_info->link_speed  = ETH_SPEED_NUM_100M;
 459                 link_info->link_duplex = ETH_LINK_FULL_DUPLEX;
 460                 break;
 461         case EFX_LINK_1000HDX:
 462                 link_info->link_speed  = ETH_SPEED_NUM_1G;
 463                 link_info->link_duplex = ETH_LINK_HALF_DUPLEX;
 464                 break;
 465         case EFX_LINK_1000FDX:
 466                 link_info->link_speed  = ETH_SPEED_NUM_1G;
 467                 link_info->link_duplex = ETH_LINK_FULL_DUPLEX;
 468                 break;
 469         case EFX_LINK_10000FDX:
 470                 link_info->link_speed  = ETH_SPEED_NUM_10G;
 471                 link_info->link_duplex = ETH_LINK_FULL_DUPLEX;
 472                 break;
 473         case EFX_LINK_40000FDX:
 474                 link_info->link_speed  = ETH_SPEED_NUM_40G;
 475                 link_info->link_duplex = ETH_LINK_FULL_DUPLEX;
 476                 break;
 477         default:
 478                 SFC_ASSERT(B_FALSE);
 479                 /* FALLTHROUGH */
 480         case EFX_LINK_UNKNOWN:
 481         case EFX_LINK_DOWN:
 482                 link_info->link_speed  = ETH_SPEED_NUM_NONE;
 483                 link_info->link_duplex = 0;
 484                 break;
 485         }
 486
 487         link_info->link_autoneg = ETH_LINK_AUTONEG;
 488 }