drivers/net/sfc/sfc_port.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 "efx.h"
  31
  32 #include "sfc.h"
  33 #include "sfc_log.h"
  34
  35 /**
  36  * Update MAC statistics in the buffer.
  37  *
  38  * @param       sa      Adapter
  39  *
  40  * @return Status code
  41  * @retval      0       Success
  42  * @retval      EAGAIN  Try again
  43  * @retval      ENOMEM  Memory allocation failure
  44  */
  45 int
  46 sfc_port_update_mac_stats(struct sfc_adapter *sa)
  47 {
  48         struct sfc_port *port = &sa->port;
  49         int rc;
  50
  51         SFC_ASSERT(rte_spinlock_is_locked(&port->mac_stats_lock));
  52
  53         if (sa->state != SFC_ADAPTER_STARTED)
  54                 return EINVAL;
  55
  56         rc = efx_mac_stats_update(sa->nic, &port->mac_stats_dma_mem,
  57                                   port->mac_stats_buf, NULL);
  58         if (rc != 0)
  59                 return rc;
  60
  61         return 0;
  62 }
  63
  64 int
  65 sfc_port_reset_mac_stats(struct sfc_adapter *sa)
  66 {
  67         struct sfc_port *port = &sa->port;
  68         int rc;
  69
  70         rte_spinlock_lock(&port->mac_stats_lock);
  71         rc = efx_mac_stats_clear(sa->nic);
  72         rte_spinlock_unlock(&port->mac_stats_lock);
  73
  74         return rc;
  75 }
  76
  77 static int
  78 sfc_port_init_dev_link(struct sfc_adapter *sa)
  79 {
  80         struct rte_eth_link *dev_link = &sa->eth_dev->data->dev_link;
  81         int rc;
  82         efx_link_mode_t link_mode;
  83         struct rte_eth_link current_link;
  84
  85         rc = efx_port_poll(sa->nic, &link_mode);
  86         if (rc != 0)
  87                 return rc;
  88
  89         sfc_port_link_mode_to_info(link_mode, &current_link);
  90
  91         EFX_STATIC_ASSERT(sizeof(*dev_link) == sizeof(rte_atomic64_t));
  92         rte_atomic64_set((rte_atomic64_t *)dev_link,
  93                          *(uint64_t *)&current_link);
  94
  95         return 0;
  96 }
  97
  98 int
  99 sfc_port_start(struct sfc_adapter *sa)
 100 {
 101         struct sfc_port *port = &sa->port;
 102         int rc;
 103         uint32_t phy_adv_cap;
 104         const uint32_t phy_pause_caps =
 105                 ((1u << EFX_PHY_CAP_PAUSE) | (1u << EFX_PHY_CAP_ASYM));
 106
 107         sfc_log_init(sa, "entry");
 108
 109         sfc_log_init(sa, "init filters");
 110         rc = efx_filter_init(sa->nic);
 111         if (rc != 0)
 112                 goto fail_filter_init;
 113
 114         sfc_log_init(sa, "init port");
 115         rc = efx_port_init(sa->nic);
 116         if (rc != 0)
 117                 goto fail_port_init;
 118
 119         sfc_log_init(sa, "set flow control to %#x autoneg=%u",
 120                      port->flow_ctrl, port->flow_ctrl_autoneg);
 121         rc = efx_mac_fcntl_set(sa->nic, port->flow_ctrl,
 122                                port->flow_ctrl_autoneg);
 123         if (rc != 0)
 124                 goto fail_mac_fcntl_set;
 125
 126         /* Preserve pause capabilities set by above efx_mac_fcntl_set()  */
 127         efx_phy_adv_cap_get(sa->nic, EFX_PHY_CAP_CURRENT, &phy_adv_cap);
 128         SFC_ASSERT((port->phy_adv_cap & phy_pause_caps) == 0);
 129         phy_adv_cap = port->phy_adv_cap | (phy_adv_cap & phy_pause_caps);
 130
 131         sfc_log_init(sa, "set phy adv caps to %#x", phy_adv_cap);
 132         rc = efx_phy_adv_cap_set(sa->nic, phy_adv_cap);
 133         if (rc != 0)
 134                 goto fail_phy_adv_cap_set;
 135
 136         sfc_log_init(sa, "set MAC PDU %u", (unsigned int)port->pdu);
 137         rc = efx_mac_pdu_set(sa->nic, port->pdu);
 138         if (rc != 0)
 139                 goto fail_mac_pdu_set;
 140
 141         sfc_log_init(sa, "set MAC address");
 142         rc = efx_mac_addr_set(sa->nic,
 143                               sa->eth_dev->data->mac_addrs[0].addr_bytes);
 144         if (rc != 0)
 145                 goto fail_mac_addr_set;
 146
 147         sfc_log_init(sa, "set MAC filters");
 148         port->promisc = (sa->eth_dev->data->promiscuous != 0) ?
 149                         B_TRUE : B_FALSE;
 150         port->allmulti = (sa->eth_dev->data->all_multicast != 0) ?
 151                          B_TRUE : B_FALSE;
 152         rc = sfc_set_rx_mode(sa);
 153         if (rc != 0)
 154                 goto fail_mac_filter_set;
 155
 156         if (port->mac_stats_reset_pending) {
 157                 rc = sfc_port_reset_mac_stats(sa);
 158                 if (rc != 0)
 159                         sfc_err(sa, "statistics reset failed (requested "
 160                                     "before the port was started)");
 161
 162                 port->mac_stats_reset_pending = B_FALSE;
 163         }
 164
 165         efx_mac_stats_get_mask(sa->nic, port->mac_stats_mask,
 166                                sizeof(port->mac_stats_mask));
 167
 168         /* Update MAC stats using periodic DMA.
 169          * Common code always uses 1000ms update period, so period_ms
 170          * parameter only needs to be non-zero to start updates.
 171          */
 172         sfc_log_init(sa, "request MAC stats DMA'ing");
 173         rc = efx_mac_stats_periodic(sa->nic, &port->mac_stats_dma_mem,
 174                                     1000, B_FALSE);
 175         if (rc != 0)
 176                 goto fail_mac_stats_periodic;
 177
 178         sfc_log_init(sa, "disable MAC drain");
 179         rc = efx_mac_drain(sa->nic, B_FALSE);
 180         if (rc != 0)
 181                 goto fail_mac_drain;
 182
 183         /* Synchronize link status knowledge */
 184         rc = sfc_port_init_dev_link(sa);
 185         if (rc != 0)
 186                 goto fail_port_init_dev_link;
 187
 188         sfc_log_init(sa, "done");
 189         return 0;
 190
 191 fail_port_init_dev_link:
 192         (void)efx_mac_drain(sa->nic, B_TRUE);
 193
 194 fail_mac_drain:
 195         (void)efx_mac_stats_periodic(sa->nic, &port->mac_stats_dma_mem,
 196                                      0, B_FALSE);
 197
 198 fail_mac_stats_periodic:
 199 fail_mac_filter_set:
 200 fail_mac_addr_set:
 201 fail_mac_pdu_set:
 202 fail_phy_adv_cap_set:
 203 fail_mac_fcntl_set:
 204         efx_port_fini(sa->nic);
 205
 206 fail_port_init:
 207         efx_filter_fini(sa->nic);
 208
 209 fail_filter_init:
 210         sfc_log_init(sa, "failed %d", rc);
 211         return rc;
 212 }
 213
 214 void
 215 sfc_port_stop(struct sfc_adapter *sa)
 216 {
 217         sfc_log_init(sa, "entry");
 218
 219         efx_mac_drain(sa->nic, B_TRUE);
 220
 221         (void)efx_mac_stats_periodic(sa->nic, &sa->port.mac_stats_dma_mem,
 222                                      0, B_FALSE);
 223
 224         efx_port_fini(sa->nic);
 225         efx_filter_fini(sa->nic);
 226
 227         sfc_log_init(sa, "done");
 228 }
 229
 230 int
 231 sfc_port_init(struct sfc_adapter *sa)
 232 {
 233         const struct rte_eth_dev_data *dev_data = sa->eth_dev->data;
 234         struct sfc_port *port = &sa->port;
 235         int rc;
 236
 237         sfc_log_init(sa, "entry");
 238
 239         /* Enable flow control by default */
 240         port->flow_ctrl = EFX_FCNTL_RESPOND | EFX_FCNTL_GENERATE;
 241         port->flow_ctrl_autoneg = B_TRUE;
 242
 243         if (dev_data->dev_conf.rxmode.jumbo_frame)
 244                 port->pdu = dev_data->dev_conf.rxmode.max_rx_pkt_len;
 245         else
 246                 port->pdu = EFX_MAC_PDU(dev_data->mtu);
 247
 248         rte_spinlock_init(&port->mac_stats_lock);
 249
 250         rc = ENOMEM;
 251         port->mac_stats_buf = rte_calloc_socket("mac_stats_buf", EFX_MAC_NSTATS,
 252                                                 sizeof(uint64_t), 0,
 253                                                 sa->socket_id);
 254         if (port->mac_stats_buf == NULL)
 255                 goto fail_mac_stats_buf_alloc;
 256
 257         rc = sfc_dma_alloc(sa, "mac_stats", 0, EFX_MAC_STATS_SIZE,
 258                            sa->socket_id, &port->mac_stats_dma_mem);
 259         if (rc != 0)
 260                 goto fail_mac_stats_dma_alloc;
 261
 262         port->mac_stats_reset_pending = B_FALSE;
 263
 264         sfc_log_init(sa, "done");
 265         return 0;
 266
 267 fail_mac_stats_dma_alloc:
 268         rte_free(port->mac_stats_buf);
 269 fail_mac_stats_buf_alloc:
 270         sfc_log_init(sa, "failed %d", rc);
 271         return rc;
 272 }
 273
 274 void
 275 sfc_port_fini(struct sfc_adapter *sa)
 276 {
 277         struct sfc_port *port = &sa->port;
 278
 279         sfc_log_init(sa, "entry");
 280
 281         sfc_dma_free(sa, &port->mac_stats_dma_mem);
 282         rte_free(port->mac_stats_buf);
 283
 284         sfc_log_init(sa, "done");
 285 }
 286
 287 int
 288 sfc_set_rx_mode(struct sfc_adapter *sa)
 289 {
 290         struct sfc_port *port = &sa->port;
 291         int rc;
 292
 293         rc = efx_mac_filter_set(sa->nic, port->promisc, B_TRUE,
 294                                 port->promisc || port->allmulti, B_TRUE);
 295
 296         return rc;
 297 }
 298
 299 void
 300 sfc_port_link_mode_to_info(efx_link_mode_t link_mode,
 301                            struct rte_eth_link *link_info)
 302 {
 303         SFC_ASSERT(link_mode < EFX_LINK_NMODES);
 304
 305         memset(link_info, 0, sizeof(*link_info));
 306         if ((link_mode == EFX_LINK_DOWN) || (link_mode == EFX_LINK_UNKNOWN))
 307                 link_info->link_status = ETH_LINK_DOWN;
 308         else
 309                 link_info->link_status = ETH_LINK_UP;
 310
 311         switch (link_mode) {
 312         case EFX_LINK_10HDX:
 313                 link_info->link_speed  = ETH_SPEED_NUM_10M;
 314                 link_info->link_duplex = ETH_LINK_HALF_DUPLEX;
 315                 break;
 316         case EFX_LINK_10FDX:
 317                 link_info->link_speed  = ETH_SPEED_NUM_10M;
 318                 link_info->link_duplex = ETH_LINK_FULL_DUPLEX;
 319                 break;
 320         case EFX_LINK_100HDX:
 321                 link_info->link_speed  = ETH_SPEED_NUM_100M;
 322                 link_info->link_duplex = ETH_LINK_HALF_DUPLEX;
 323                 break;
 324         case EFX_LINK_100FDX:
 325                 link_info->link_speed  = ETH_SPEED_NUM_100M;
 326                 link_info->link_duplex = ETH_LINK_FULL_DUPLEX;
 327                 break;
 328         case EFX_LINK_1000HDX:
 329                 link_info->link_speed  = ETH_SPEED_NUM_1G;
 330                 link_info->link_duplex = ETH_LINK_HALF_DUPLEX;
 331                 break;
 332         case EFX_LINK_1000FDX:
 333                 link_info->link_speed  = ETH_SPEED_NUM_1G;
 334                 link_info->link_duplex = ETH_LINK_FULL_DUPLEX;
 335                 break;
 336         case EFX_LINK_10000FDX:
 337                 link_info->link_speed  = ETH_SPEED_NUM_10G;
 338                 link_info->link_duplex = ETH_LINK_FULL_DUPLEX;
 339                 break;
 340         case EFX_LINK_40000FDX:
 341                 link_info->link_speed  = ETH_SPEED_NUM_40G;
 342                 link_info->link_duplex = ETH_LINK_FULL_DUPLEX;
 343                 break;
 344         default:
 345                 SFC_ASSERT(B_FALSE);
 346                 /* FALLTHROUGH */
 347         case EFX_LINK_UNKNOWN:
 348         case EFX_LINK_DOWN:
 349                 link_info->link_speed  = ETH_SPEED_NUM_NONE;
 350                 link_info->link_duplex = 0;
 351                 break;
 352         }
 353
 354         link_info->link_autoneg = ETH_LINK_AUTONEG;
 355 }