drivers/net/ethernet/mellanox/mlx4/en_netdev.c

   1 /*
   2  * Copyright (c) 2007 Mellanox Technologies. All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  *
  32  */
  33
  34 #include <linux/etherdevice.h>
  35 #include <linux/tcp.h>
  36 #include <linux/if_vlan.h>
  37 #include <linux/delay.h>
  38 #include <linux/slab.h>
  39
  40 #include <linux/mlx4/driver.h>
  41 #include <linux/mlx4/device.h>
  42 #include <linux/mlx4/cmd.h>
  43 #include <linux/mlx4/cq.h>
  44
  45 #include "mlx4_en.h"
  46 #include "en_port.h"
  47
  48 static int mlx4_en_setup_tc(struct net_device *dev, u8 up)
  49 {
  50         struct mlx4_en_priv *priv = netdev_priv(dev);
  51         int i;
  52         unsigned int q, offset = 0;
  53
  54         if (up && up != MLX4_EN_NUM_UP)
  55                 return -EINVAL;
  56
  57         netdev_set_num_tc(dev, up);
  58
  59         /* Partition Tx queues evenly amongst UP's */
  60         q = priv->tx_ring_num / up;
  61         for (i = 0; i < up; i++) {
  62                 netdev_set_tc_queue(dev, i, q, offset);
  63                 offset += q;
  64         }
  65
  66         return 0;
  67 }
  68
  69 static int mlx4_en_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
  70 {
  71         struct mlx4_en_priv *priv = netdev_priv(dev);
  72         struct mlx4_en_dev *mdev = priv->mdev;
  73         int err;
  74         int idx;
  75
  76         en_dbg(HW, priv, "adding VLAN:%d\n", vid);
  77
  78         set_bit(vid, priv->active_vlans);
  79
  80         /* Add VID to port VLAN filter */
  81         mutex_lock(&mdev->state_lock);
  82         if (mdev->device_up && priv->port_up) {
  83                 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv);
  84                 if (err)
  85                         en_err(priv, "Failed configuring VLAN filter\n");
  86         }
  87         if (mlx4_register_vlan(mdev->dev, priv->port, vid, &idx))
  88                 en_err(priv, "failed adding vlan %d\n", vid);
  89         mutex_unlock(&mdev->state_lock);
  90
  91         return 0;
  92 }
  93
  94 static int mlx4_en_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
  95 {
  96         struct mlx4_en_priv *priv = netdev_priv(dev);
  97         struct mlx4_en_dev *mdev = priv->mdev;
  98         int err;
  99         int idx;
 100
 101         en_dbg(HW, priv, "Killing VID:%d\n", vid);
 102
 103         clear_bit(vid, priv->active_vlans);
 104
 105         /* Remove VID from port VLAN filter */
 106         mutex_lock(&mdev->state_lock);
 107         if (!mlx4_find_cached_vlan(mdev->dev, priv->port, vid, &idx))
 108                 mlx4_unregister_vlan(mdev->dev, priv->port, idx);
 109         else
 110                 en_err(priv, "could not find vid %d in cache\n", vid);
 111
 112         if (mdev->device_up && priv->port_up) {
 113                 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv);
 114                 if (err)
 115                         en_err(priv, "Failed configuring VLAN filter\n");
 116         }
 117         mutex_unlock(&mdev->state_lock);
 118
 119         return 0;
 120 }
 121
 122 u64 mlx4_en_mac_to_u64(u8 *addr)
 123 {
 124         u64 mac = 0;
 125         int i;
 126
 127         for (i = 0; i < ETH_ALEN; i++) {
 128                 mac <<= 8;
 129                 mac |= addr[i];
 130         }
 131         return mac;
 132 }
 133
 134 static int mlx4_en_set_mac(struct net_device *dev, void *addr)
 135 {
 136         struct mlx4_en_priv *priv = netdev_priv(dev);
 137         struct mlx4_en_dev *mdev = priv->mdev;
 138         struct sockaddr *saddr = addr;
 139
 140         if (!is_valid_ether_addr(saddr->sa_data))
 141                 return -EADDRNOTAVAIL;
 142
 143         memcpy(dev->dev_addr, saddr->sa_data, ETH_ALEN);
 144         priv->mac = mlx4_en_mac_to_u64(dev->dev_addr);
 145         queue_work(mdev->workqueue, &priv->mac_task);
 146         return 0;
 147 }
 148
 149 static void mlx4_en_do_set_mac(struct work_struct *work)
 150 {
 151         struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
 152                                                  mac_task);
 153         struct mlx4_en_dev *mdev = priv->mdev;
 154         int err = 0;
 155
 156         mutex_lock(&mdev->state_lock);
 157         if (priv->port_up) {
 158                 /* Remove old MAC and insert the new one */
 159                 err = mlx4_replace_mac(mdev->dev, priv->port,
 160                                        priv->base_qpn, priv->mac);
 161                 if (err)
 162                         en_err(priv, "Failed changing HW MAC address\n");
 163         } else
 164                 en_dbg(HW, priv, "Port is down while "
 165                                  "registering mac, exiting...\n");
 166
 167         mutex_unlock(&mdev->state_lock);
 168 }
 169
 170 static void mlx4_en_clear_list(struct net_device *dev)
 171 {
 172         struct mlx4_en_priv *priv = netdev_priv(dev);
 173         struct mlx4_en_mc_list *tmp, *mc_to_del;
 174
 175         list_for_each_entry_safe(mc_to_del, tmp, &priv->mc_list, list) {
 176                 list_del(&mc_to_del->list);
 177                 kfree(mc_to_del);
 178         }
 179 }
 180
 181 static void mlx4_en_cache_mclist(struct net_device *dev)
 182 {
 183         struct mlx4_en_priv *priv = netdev_priv(dev);
 184         struct netdev_hw_addr *ha;
 185         struct mlx4_en_mc_list *tmp;
 186
 187         mlx4_en_clear_list(dev);
 188         netdev_for_each_mc_addr(ha, dev) {
 189                 tmp = kzalloc(sizeof(struct mlx4_en_mc_list), GFP_ATOMIC);
 190                 if (!tmp) {
 191                         en_err(priv, "failed to allocate multicast list\n");
 192                         mlx4_en_clear_list(dev);
 193                         return;
 194                 }
 195                 memcpy(tmp->addr, ha->addr, ETH_ALEN);
 196                 list_add_tail(&tmp->list, &priv->mc_list);
 197         }
 198 }
 199
 200 static void update_mclist_flags(struct mlx4_en_priv *priv,
 201                                 struct list_head *dst,
 202                                 struct list_head *src)
 203 {
 204         struct mlx4_en_mc_list *dst_tmp, *src_tmp, *new_mc;
 205         bool found;
 206
 207         /* Find all the entries that should be removed from dst,
 208          * These are the entries that are not found in src
 209          */
 210         list_for_each_entry(dst_tmp, dst, list) {
 211                 found = false;
 212                 list_for_each_entry(src_tmp, src, list) {
 213                         if (!memcmp(dst_tmp->addr, src_tmp->addr, ETH_ALEN)) {
 214                                 found = true;
 215                                 break;
 216                         }
 217                 }
 218                 if (!found)
 219                         dst_tmp->action = MCLIST_REM;
 220         }
 221
 222         /* Add entries that exist in src but not in dst
 223          * mark them as need to add
 224          */
 225         list_for_each_entry(src_tmp, src, list) {
 226                 found = false;
 227                 list_for_each_entry(dst_tmp, dst, list) {
 228                         if (!memcmp(dst_tmp->addr, src_tmp->addr, ETH_ALEN)) {
 229                                 dst_tmp->action = MCLIST_NONE;
 230                                 found = true;
 231                                 break;
 232                         }
 233                 }
 234                 if (!found) {
 235                         new_mc = kmalloc(sizeof(struct mlx4_en_mc_list),
 236                                          GFP_KERNEL);
 237                         if (!new_mc) {
 238                                 en_err(priv, "Failed to allocate current multicast list\n");
 239                                 return;
 240                         }
 241                         memcpy(new_mc, src_tmp,
 242                                sizeof(struct mlx4_en_mc_list));
 243                         new_mc->action = MCLIST_ADD;
 244                         list_add_tail(&new_mc->list, dst);
 245                 }
 246         }
 247 }
 248
 249 static void mlx4_en_set_multicast(struct net_device *dev)
 250 {
 251         struct mlx4_en_priv *priv = netdev_priv(dev);
 252
 253         if (!priv->port_up)
 254                 return;
 255
 256         queue_work(priv->mdev->workqueue, &priv->mcast_task);
 257 }
 258
 259 static void mlx4_en_do_set_multicast(struct work_struct *work)
 260 {
 261         struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
 262                                                  mcast_task);
 263         struct mlx4_en_dev *mdev = priv->mdev;
 264         struct net_device *dev = priv->dev;
 265         struct mlx4_en_mc_list *mclist, *tmp;
 266         u64 mcast_addr = 0;
 267         u8 mc_list[16] = {0};
 268         int err = 0;
 269
 270         mutex_lock(&mdev->state_lock);
 271         if (!mdev->device_up) {
 272                 en_dbg(HW, priv, "Card is not up, "
 273                                  "ignoring multicast change.\n");
 274                 goto out;
 275         }
 276         if (!priv->port_up) {
 277                 en_dbg(HW, priv, "Port is down, "
 278                                  "ignoring  multicast change.\n");
 279                 goto out;
 280         }
 281
 282         if (!netif_carrier_ok(dev)) {
 283                 if (!mlx4_en_QUERY_PORT(mdev, priv->port)) {
 284                         if (priv->port_state.link_state) {
 285                                 priv->last_link_state = MLX4_DEV_EVENT_PORT_UP;
 286                                 netif_carrier_on(dev);
 287                                 en_dbg(LINK, priv, "Link Up\n");
 288                         }
 289                 }
 290         }
 291
 292         /*
 293          * Promsicuous mode: disable all filters
 294          */
 295
 296         if (dev->flags & IFF_PROMISC) {
 297                 if (!(priv->flags & MLX4_EN_FLAG_PROMISC)) {
 298                         if (netif_msg_rx_status(priv))
 299                                 en_warn(priv, "Entering promiscuous mode\n");
 300                         priv->flags |= MLX4_EN_FLAG_PROMISC;
 301
 302                         /* Enable promiscouos mode */
 303                         switch (mdev->dev->caps.steering_mode) {
 304                         case MLX4_STEERING_MODE_B0:
 305                                 err = mlx4_unicast_promisc_add(mdev->dev,
 306                                                                priv->base_qpn,
 307                                                                priv->port);
 308                                 if (err)
 309                                         en_err(priv, "Failed enabling unicast promiscuous mode\n");
 310
 311                                 /* Add the default qp number as multicast
 312                                  * promisc
 313                                  */
 314                                 if (!(priv->flags & MLX4_EN_FLAG_MC_PROMISC)) {
 315                                         err = mlx4_multicast_promisc_add(mdev->dev,
 316                                                                          priv->base_qpn,
 317                                                                          priv->port);
 318                                         if (err)
 319                                                 en_err(priv, "Failed enabling multicast promiscuous mode\n");
 320                                         priv->flags |= MLX4_EN_FLAG_MC_PROMISC;
 321                                 }
 322                                 break;
 323
 324                         case MLX4_STEERING_MODE_A0:
 325                                 err = mlx4_SET_PORT_qpn_calc(mdev->dev,
 326                                                              priv->port,
 327                                                              priv->base_qpn,
 328                                                              1);
 329                                 if (err)
 330                                         en_err(priv, "Failed enabling promiscuous mode\n");
 331                                 break;
 332                         }
 333
 334                         /* Disable port multicast filter (unconditionally) */
 335                         err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
 336                                                   0, MLX4_MCAST_DISABLE);
 337                         if (err)
 338                                 en_err(priv, "Failed disabling "
 339                                              "multicast filter\n");
 340
 341                         /* Disable port VLAN filter */
 342                         err = mlx4_SET_VLAN_FLTR(mdev->dev, priv);
 343                         if (err)
 344                                 en_err(priv, "Failed disabling VLAN filter\n");
 345                 }
 346                 goto out;
 347         }
 348
 349         /*
 350          * Not in promiscuous mode
 351          */
 352
 353         if (priv->flags & MLX4_EN_FLAG_PROMISC) {
 354                 if (netif_msg_rx_status(priv))
 355                         en_warn(priv, "Leaving promiscuous mode\n");
 356                 priv->flags &= ~MLX4_EN_FLAG_PROMISC;
 357
 358                 /* Disable promiscouos mode */
 359                 switch (mdev->dev->caps.steering_mode) {
 360                 case MLX4_STEERING_MODE_B0:
 361                         err = mlx4_unicast_promisc_remove(mdev->dev,
 362                                                           priv->base_qpn,
 363                                                           priv->port);
 364                         if (err)
 365                                 en_err(priv, "Failed disabling unicast promiscuous mode\n");
 366                         /* Disable Multicast promisc */
 367                         if (priv->flags & MLX4_EN_FLAG_MC_PROMISC) {
 368                                 err = mlx4_multicast_promisc_remove(mdev->dev,
 369                                                                     priv->base_qpn,
 370                                                                     priv->port);
 371                                 if (err)
 372                                         en_err(priv, "Failed disabling multicast promiscuous mode\n");
 373                                 priv->flags &= ~MLX4_EN_FLAG_MC_PROMISC;
 374                         }
 375                         break;
 376
 377                 case MLX4_STEERING_MODE_A0:
 378                         err = mlx4_SET_PORT_qpn_calc(mdev->dev,
 379                                                      priv->port,
 380                                                      priv->base_qpn, 0);
 381                         if (err)
 382                                 en_err(priv, "Failed disabling promiscuous mode\n");
 383                         break;
 384                 }
 385
 386                 /* Enable port VLAN filter */
 387                 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv);
 388                 if (err)
 389                         en_err(priv, "Failed enabling VLAN filter\n");
 390         }
 391
 392         /* Enable/disable the multicast filter according to IFF_ALLMULTI */
 393         if (dev->flags & IFF_ALLMULTI) {
 394                 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
 395                                           0, MLX4_MCAST_DISABLE);
 396                 if (err)
 397                         en_err(priv, "Failed disabling multicast filter\n");
 398
 399                 /* Add the default qp number as multicast promisc */
 400                 if (!(priv->flags & MLX4_EN_FLAG_MC_PROMISC)) {
 401                         switch (mdev->dev->caps.steering_mode) {
 402                         case MLX4_STEERING_MODE_B0:
 403                                 err = mlx4_multicast_promisc_add(mdev->dev,
 404                                                                  priv->base_qpn,
 405                                                                  priv->port);
 406                                 break;
 407
 408                         case MLX4_STEERING_MODE_A0:
 409                                 break;
 410                         }
 411                         if (err)
 412                                 en_err(priv, "Failed entering multicast promisc mode\n");
 413                         priv->flags |= MLX4_EN_FLAG_MC_PROMISC;
 414                 }
 415         } else {
 416                 /* Disable Multicast promisc */
 417                 if (priv->flags & MLX4_EN_FLAG_MC_PROMISC) {
 418                         switch (mdev->dev->caps.steering_mode) {
 419                         case MLX4_STEERING_MODE_B0:
 420                                 err = mlx4_multicast_promisc_remove(mdev->dev,
 421                                                                     priv->base_qpn,
 422                                                                     priv->port);
 423                                 break;
 424
 425                         case MLX4_STEERING_MODE_A0:
 426                                 break;
 427                         }
 428                         if (err)
 429                                 en_err(priv, "Failed disabling multicast promiscuous mode\n");
 430                         priv->flags &= ~MLX4_EN_FLAG_MC_PROMISC;
 431                 }
 432
 433                 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
 434                                           0, MLX4_MCAST_DISABLE);
 435                 if (err)
 436                         en_err(priv, "Failed disabling multicast filter\n");
 437
 438                 /* Flush mcast filter and init it with broadcast address */
 439                 mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, ETH_BCAST,
 440                                     1, MLX4_MCAST_CONFIG);
 441
 442                 /* Update multicast list - we cache all addresses so they won't
 443                  * change while HW is updated holding the command semaphor */
 444                 netif_tx_lock_bh(dev);
 445                 mlx4_en_cache_mclist(dev);
 446                 netif_tx_unlock_bh(dev);
 447                 list_for_each_entry(mclist, &priv->mc_list, list) {
 448                         mcast_addr = mlx4_en_mac_to_u64(mclist->addr);
 449                         mlx4_SET_MCAST_FLTR(mdev->dev, priv->port,
 450                                             mcast_addr, 0, MLX4_MCAST_CONFIG);
 451                 }
 452                 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
 453                                           0, MLX4_MCAST_ENABLE);
 454                 if (err)
 455                         en_err(priv, "Failed enabling multicast filter\n");
 456
 457                 update_mclist_flags(priv, &priv->curr_list, &priv->mc_list);
 458                 list_for_each_entry_safe(mclist, tmp, &priv->curr_list, list) {
 459                         if (mclist->action == MCLIST_REM) {
 460                                 /* detach this address and delete from list */
 461                                 memcpy(&mc_list[10], mclist->addr, ETH_ALEN);
 462                                 mc_list[5] = priv->port;
 463                                 err = mlx4_multicast_detach(mdev->dev,
 464                                                             &priv->rss_map.indir_qp,
 465                                                             mc_list,
 466                                                             MLX4_PROT_ETH,
 467                                                             mclist->reg_id);
 468                                 if (err)
 469                                         en_err(priv, "Fail to detach multicast address\n");
 470
 471                                 /* remove from list */
 472                                 list_del(&mclist->list);
 473                                 kfree(mclist);
 474                         }
 475
 476                         if (mclist->action == MCLIST_ADD) {
 477                                 /* attach the address */
 478                                 memcpy(&mc_list[10], mclist->addr, ETH_ALEN);
 479                                 /* needed for B0 steering support */
 480                                 mc_list[5] = priv->port;
 481                                 err = mlx4_multicast_attach(mdev->dev,
 482                                                             &priv->rss_map.indir_qp,
 483                                                             mc_list,
 484                                                             priv->port, 0,
 485                                                             MLX4_PROT_ETH,
 486                                                             &mclist->reg_id);
 487                                 if (err)
 488                                         en_err(priv, "Fail to attach multicast address\n");
 489
 490                         }
 491                 }
 492         }
 493 out:
 494         mutex_unlock(&mdev->state_lock);
 495 }
 496
 497 #ifdef CONFIG_NET_POLL_CONTROLLER
 498 static void mlx4_en_netpoll(struct net_device *dev)
 499 {
 500         struct mlx4_en_priv *priv = netdev_priv(dev);
 501         struct mlx4_en_cq *cq;
 502         unsigned long flags;
 503         int i;
 504
 505         for (i = 0; i < priv->rx_ring_num; i++) {
 506                 cq = &priv->rx_cq[i];
 507                 spin_lock_irqsave(&cq->lock, flags);
 508                 napi_synchronize(&cq->napi);
 509                 mlx4_en_process_rx_cq(dev, cq, 0);
 510                 spin_unlock_irqrestore(&cq->lock, flags);
 511         }
 512 }
 513 #endif
 514
 515 static void mlx4_en_tx_timeout(struct net_device *dev)
 516 {
 517         struct mlx4_en_priv *priv = netdev_priv(dev);
 518         struct mlx4_en_dev *mdev = priv->mdev;
 519
 520         if (netif_msg_timer(priv))
 521                 en_warn(priv, "Tx timeout called on port:%d\n", priv->port);
 522
 523         priv->port_stats.tx_timeout++;
 524         en_dbg(DRV, priv, "Scheduling watchdog\n");
 525         queue_work(mdev->workqueue, &priv->watchdog_task);
 526 }
 527
 528
 529 static struct net_device_stats *mlx4_en_get_stats(struct net_device *dev)
 530 {
 531         struct mlx4_en_priv *priv = netdev_priv(dev);
 532
 533         spin_lock_bh(&priv->stats_lock);
 534         memcpy(&priv->ret_stats, &priv->stats, sizeof(priv->stats));
 535         spin_unlock_bh(&priv->stats_lock);
 536
 537         return &priv->ret_stats;
 538 }
 539
 540 static void mlx4_en_set_default_moderation(struct mlx4_en_priv *priv)
 541 {
 542         struct mlx4_en_cq *cq;
 543         int i;
 544
 545         /* If we haven't received a specific coalescing setting
 546          * (module param), we set the moderation parameters as follows:
 547          * - moder_cnt is set to the number of mtu sized packets to
 548          *   satisfy our coelsing target.
 549          * - moder_time is set to a fixed value.
 550          */
 551         priv->rx_frames = MLX4_EN_RX_COAL_TARGET;
 552         priv->rx_usecs = MLX4_EN_RX_COAL_TIME;
 553         priv->tx_frames = MLX4_EN_TX_COAL_PKTS;
 554         priv->tx_usecs = MLX4_EN_TX_COAL_TIME;
 555         en_dbg(INTR, priv, "Default coalesing params for mtu:%d - "
 556                            "rx_frames:%d rx_usecs:%d\n",
 557                  priv->dev->mtu, priv->rx_frames, priv->rx_usecs);
 558
 559         /* Setup cq moderation params */
 560         for (i = 0; i < priv->rx_ring_num; i++) {
 561                 cq = &priv->rx_cq[i];
 562                 cq->moder_cnt = priv->rx_frames;
 563                 cq->moder_time = priv->rx_usecs;
 564                 priv->last_moder_time[i] = MLX4_EN_AUTO_CONF;
 565                 priv->last_moder_packets[i] = 0;
 566                 priv->last_moder_bytes[i] = 0;
 567         }
 568
 569         for (i = 0; i < priv->tx_ring_num; i++) {
 570                 cq = &priv->tx_cq[i];
 571                 cq->moder_cnt = priv->tx_frames;
 572                 cq->moder_time = priv->tx_usecs;
 573         }
 574
 575         /* Reset auto-moderation params */
 576         priv->pkt_rate_low = MLX4_EN_RX_RATE_LOW;
 577         priv->rx_usecs_low = MLX4_EN_RX_COAL_TIME_LOW;
 578         priv->pkt_rate_high = MLX4_EN_RX_RATE_HIGH;
 579         priv->rx_usecs_high = MLX4_EN_RX_COAL_TIME_HIGH;
 580         priv->sample_interval = MLX4_EN_SAMPLE_INTERVAL;
 581         priv->adaptive_rx_coal = 1;
 582         priv->last_moder_jiffies = 0;
 583         priv->last_moder_tx_packets = 0;
 584 }
 585
 586 static void mlx4_en_auto_moderation(struct mlx4_en_priv *priv)
 587 {
 588         unsigned long period = (unsigned long) (jiffies - priv->last_moder_jiffies);
 589         struct mlx4_en_cq *cq;
 590         unsigned long packets;
 591         unsigned long rate;
 592         unsigned long avg_pkt_size;
 593         unsigned long rx_packets;
 594         unsigned long rx_bytes;
 595         unsigned long rx_pkt_diff;
 596         int moder_time;
 597         int ring, err;
 598
 599         if (!priv->adaptive_rx_coal || period < priv->sample_interval * HZ)
 600                 return;
 601
 602         for (ring = 0; ring < priv->rx_ring_num; ring++) {
 603                 spin_lock_bh(&priv->stats_lock);
 604                 rx_packets = priv->rx_ring[ring].packets;
 605                 rx_bytes = priv->rx_ring[ring].bytes;
 606                 spin_unlock_bh(&priv->stats_lock);
 607
 608                 rx_pkt_diff = ((unsigned long) (rx_packets -
 609                                 priv->last_moder_packets[ring]));
 610                 packets = rx_pkt_diff;
 611                 rate = packets * HZ / period;
 612                 avg_pkt_size = packets ? ((unsigned long) (rx_bytes -
 613                                 priv->last_moder_bytes[ring])) / packets : 0;
 614
 615                 /* Apply auto-moderation only when packet rate
 616                  * exceeds a rate that it matters */
 617                 if (rate > (MLX4_EN_RX_RATE_THRESH / priv->rx_ring_num) &&
 618                     avg_pkt_size > MLX4_EN_AVG_PKT_SMALL) {
 619                         if (rate < priv->pkt_rate_low)
 620                                 moder_time = priv->rx_usecs_low;
 621                         else if (rate > priv->pkt_rate_high)
 622                                 moder_time = priv->rx_usecs_high;
 623                         else
 624                                 moder_time = (rate - priv->pkt_rate_low) *
 625                                         (priv->rx_usecs_high - priv->rx_usecs_low) /
 626                                         (priv->pkt_rate_high - priv->pkt_rate_low) +
 627                                         priv->rx_usecs_low;
 628                 } else {
 629                         moder_time = priv->rx_usecs_low;
 630                 }
 631
 632                 if (moder_time != priv->last_moder_time[ring]) {
 633                         priv->last_moder_time[ring] = moder_time;
 634                         cq = &priv->rx_cq[ring];
 635                         cq->moder_time = moder_time;
 636                         err = mlx4_en_set_cq_moder(priv, cq);
 637                         if (err)
 638                                 en_err(priv, "Failed modifying moderation "
 639                                              "for cq:%d\n", ring);
 640                 }
 641                 priv->last_moder_packets[ring] = rx_packets;
 642                 priv->last_moder_bytes[ring] = rx_bytes;
 643         }
 644
 645         priv->last_moder_jiffies = jiffies;
 646 }
 647
 648 static void mlx4_en_do_get_stats(struct work_struct *work)
 649 {
 650         struct delayed_work *delay = to_delayed_work(work);
 651         struct mlx4_en_priv *priv = container_of(delay, struct mlx4_en_priv,
 652                                                  stats_task);
 653         struct mlx4_en_dev *mdev = priv->mdev;
 654         int err;
 655
 656         err = mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 0);
 657         if (err)
 658                 en_dbg(HW, priv, "Could not update stats\n");
 659
 660         mutex_lock(&mdev->state_lock);
 661         if (mdev->device_up) {
 662                 if (priv->port_up)
 663                         mlx4_en_auto_moderation(priv);
 664
 665                 queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);
 666         }
 667         if (mdev->mac_removed[MLX4_MAX_PORTS + 1 - priv->port]) {
 668                 queue_work(mdev->workqueue, &priv->mac_task);
 669                 mdev->mac_removed[MLX4_MAX_PORTS + 1 - priv->port] = 0;
 670         }
 671         mutex_unlock(&mdev->state_lock);
 672 }
 673
 674 static void mlx4_en_linkstate(struct work_struct *work)
 675 {
 676         struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
 677                                                  linkstate_task);
 678         struct mlx4_en_dev *mdev = priv->mdev;
 679         int linkstate = priv->link_state;
 680
 681         mutex_lock(&mdev->state_lock);
 682         /* If observable port state changed set carrier state and
 683          * report to system log */
 684         if (priv->last_link_state != linkstate) {
 685                 if (linkstate == MLX4_DEV_EVENT_PORT_DOWN) {
 686                         en_info(priv, "Link Down\n");
 687                         netif_carrier_off(priv->dev);
 688                 } else {
 689                         en_info(priv, "Link Up\n");
 690                         netif_carrier_on(priv->dev);
 691                 }
 692         }
 693         priv->last_link_state = linkstate;
 694         mutex_unlock(&mdev->state_lock);
 695 }
 696
 697
 698 int mlx4_en_start_port(struct net_device *dev)
 699 {
 700         struct mlx4_en_priv *priv = netdev_priv(dev);
 701         struct mlx4_en_dev *mdev = priv->mdev;
 702         struct mlx4_en_cq *cq;
 703         struct mlx4_en_tx_ring *tx_ring;
 704         int rx_index = 0;
 705         int tx_index = 0;
 706         int err = 0;
 707         int i;
 708         int j;
 709         u8 mc_list[16] = {0};
 710
 711         if (priv->port_up) {
 712                 en_dbg(DRV, priv, "start port called while port already up\n");
 713                 return 0;
 714         }
 715
 716         INIT_LIST_HEAD(&priv->mc_list);
 717         INIT_LIST_HEAD(&priv->curr_list);
 718
 719         /* Calculate Rx buf size */
 720         dev->mtu = min(dev->mtu, priv->max_mtu);
 721         mlx4_en_calc_rx_buf(dev);
 722         en_dbg(DRV, priv, "Rx buf size:%d\n", priv->rx_skb_size);
 723
 724         /* Configure rx cq's and rings */
 725         err = mlx4_en_activate_rx_rings(priv);
 726         if (err) {
 727                 en_err(priv, "Failed to activate RX rings\n");
 728                 return err;
 729         }
 730         for (i = 0; i < priv->rx_ring_num; i++) {
 731                 cq = &priv->rx_cq[i];
 732
 733                 err = mlx4_en_activate_cq(priv, cq, i);
 734                 if (err) {
 735                         en_err(priv, "Failed activating Rx CQ\n");
 736                         goto cq_err;
 737                 }
 738                 for (j = 0; j < cq->size; j++)
 739                         cq->buf[j].owner_sr_opcode = MLX4_CQE_OWNER_MASK;
 740                 err = mlx4_en_set_cq_moder(priv, cq);
 741                 if (err) {
 742                         en_err(priv, "Failed setting cq moderation parameters");
 743                         mlx4_en_deactivate_cq(priv, cq);
 744                         goto cq_err;
 745                 }
 746                 mlx4_en_arm_cq(priv, cq);
 747                 priv->rx_ring[i].cqn = cq->mcq.cqn;
 748                 ++rx_index;
 749         }
 750
 751         /* Set qp number */
 752         en_dbg(DRV, priv, "Getting qp number for port %d\n", priv->port);
 753         err = mlx4_get_eth_qp(mdev->dev, priv->port,
 754                                 priv->mac, &priv->base_qpn);
 755         if (err) {
 756                 en_err(priv, "Failed getting eth qp\n");
 757                 goto cq_err;
 758         }
 759         mdev->mac_removed[priv->port] = 0;
 760
 761         err = mlx4_en_config_rss_steer(priv);
 762         if (err) {
 763                 en_err(priv, "Failed configuring rss steering\n");
 764                 goto mac_err;
 765         }
 766
 767         /* Configure tx cq's and rings */
 768         for (i = 0; i < priv->tx_ring_num; i++) {
 769                 /* Configure cq */
 770                 cq = &priv->tx_cq[i];
 771                 err = mlx4_en_activate_cq(priv, cq, i);
 772                 if (err) {
 773                         en_err(priv, "Failed allocating Tx CQ\n");
 774                         goto tx_err;
 775                 }
 776                 err = mlx4_en_set_cq_moder(priv, cq);
 777                 if (err) {
 778                         en_err(priv, "Failed setting cq moderation parameters");
 779                         mlx4_en_deactivate_cq(priv, cq);
 780                         goto tx_err;
 781                 }
 782                 en_dbg(DRV, priv, "Resetting index of collapsed CQ:%d to -1\n", i);
 783                 cq->buf->wqe_index = cpu_to_be16(0xffff);
 784
 785                 /* Configure ring */
 786                 tx_ring = &priv->tx_ring[i];
 787                 err = mlx4_en_activate_tx_ring(priv, tx_ring, cq->mcq.cqn,
 788                         i / priv->mdev->profile.num_tx_rings_p_up);
 789                 if (err) {
 790                         en_err(priv, "Failed allocating Tx ring\n");
 791                         mlx4_en_deactivate_cq(priv, cq);
 792                         goto tx_err;
 793                 }
 794                 tx_ring->tx_queue = netdev_get_tx_queue(dev, i);
 795
 796                 /* Arm CQ for TX completions */
 797                 mlx4_en_arm_cq(priv, cq);
 798
 799                 /* Set initial ownership of all Tx TXBBs to SW (1) */
 800                 for (j = 0; j < tx_ring->buf_size; j += STAMP_STRIDE)
 801                         *((u32 *) (tx_ring->buf + j)) = 0xffffffff;
 802                 ++tx_index;
 803         }
 804
 805         /* Configure port */
 806         err = mlx4_SET_PORT_general(mdev->dev, priv->port,
 807                                     priv->rx_skb_size + ETH_FCS_LEN,
 808                                     priv->prof->tx_pause,
 809                                     priv->prof->tx_ppp,
 810                                     priv->prof->rx_pause,
 811                                     priv->prof->rx_ppp);
 812         if (err) {
 813                 en_err(priv, "Failed setting port general configurations "
 814                              "for port %d, with error %d\n", priv->port, err);
 815                 goto tx_err;
 816         }
 817         /* Set default qp number */
 818         err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port, priv->base_qpn, 0);
 819         if (err) {
 820                 en_err(priv, "Failed setting default qp numbers\n");
 821                 goto tx_err;
 822         }
 823
 824         /* Init port */
 825         en_dbg(HW, priv, "Initializing port\n");
 826         err = mlx4_INIT_PORT(mdev->dev, priv->port);
 827         if (err) {
 828                 en_err(priv, "Failed Initializing port\n");
 829                 goto tx_err;
 830         }
 831
 832         /* Attach rx QP to bradcast address */
 833         memset(&mc_list[10], 0xff, ETH_ALEN);
 834         mc_list[5] = priv->port; /* needed for B0 steering support */
 835         if (mlx4_multicast_attach(mdev->dev, &priv->rss_map.indir_qp, mc_list,
 836                                   priv->port, 0, MLX4_PROT_ETH,
 837                                   &priv->broadcast_id))
 838                 mlx4_warn(mdev, "Failed Attaching Broadcast\n");
 839
 840         /* Must redo promiscuous mode setup. */
 841         priv->flags &= ~(MLX4_EN_FLAG_PROMISC | MLX4_EN_FLAG_MC_PROMISC);
 842
 843         /* Schedule multicast task to populate multicast list */
 844         queue_work(mdev->workqueue, &priv->mcast_task);
 845
 846         mlx4_set_stats_bitmap(mdev->dev, &priv->stats_bitmap);
 847
 848         priv->port_up = true;
 849         netif_tx_start_all_queues(dev);
 850         return 0;
 851
 852 tx_err:
 853         while (tx_index--) {
 854                 mlx4_en_deactivate_tx_ring(priv, &priv->tx_ring[tx_index]);
 855                 mlx4_en_deactivate_cq(priv, &priv->tx_cq[tx_index]);
 856         }
 857
 858         mlx4_en_release_rss_steer(priv);
 859 mac_err:
 860         mlx4_put_eth_qp(mdev->dev, priv->port, priv->mac, priv->base_qpn);
 861 cq_err:
 862         while (rx_index--)
 863                 mlx4_en_deactivate_cq(priv, &priv->rx_cq[rx_index]);
 864         for (i = 0; i < priv->rx_ring_num; i++)
 865                 mlx4_en_deactivate_rx_ring(priv, &priv->rx_ring[i]);
 866
 867         return err; /* need to close devices */
 868 }
 869
 870
 871 void mlx4_en_stop_port(struct net_device *dev)
 872 {
 873         struct mlx4_en_priv *priv = netdev_priv(dev);
 874         struct mlx4_en_dev *mdev = priv->mdev;
 875         struct mlx4_en_mc_list *mclist, *tmp;
 876         int i;
 877         u8 mc_list[16] = {0};
 878
 879         if (!priv->port_up) {
 880                 en_dbg(DRV, priv, "stop port called while port already down\n");
 881                 return;
 882         }
 883
 884         /* Synchronize with tx routine */
 885         netif_tx_lock_bh(dev);
 886         netif_tx_stop_all_queues(dev);
 887         netif_tx_unlock_bh(dev);
 888
 889         /* Set port as not active */
 890         priv->port_up = false;
 891
 892         /* Detach All multicasts */
 893         memset(&mc_list[10], 0xff, ETH_ALEN);
 894         mc_list[5] = priv->port; /* needed for B0 steering support */
 895         mlx4_multicast_detach(mdev->dev, &priv->rss_map.indir_qp, mc_list,
 896                               MLX4_PROT_ETH, priv->broadcast_id);
 897         list_for_each_entry(mclist, &priv->curr_list, list) {
 898                 memcpy(&mc_list[10], mclist->addr, ETH_ALEN);
 899                 mc_list[5] = priv->port;
 900                 mlx4_multicast_detach(mdev->dev, &priv->rss_map.indir_qp,
 901                                       mc_list, MLX4_PROT_ETH, mclist->reg_id);
 902         }
 903         mlx4_en_clear_list(dev);
 904         list_for_each_entry_safe(mclist, tmp, &priv->curr_list, list) {
 905                 list_del(&mclist->list);
 906                 kfree(mclist);
 907         }
 908
 909         /* Flush multicast filter */
 910         mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0, 1, MLX4_MCAST_CONFIG);
 911
 912         /* Free TX Rings */
 913         for (i = 0; i < priv->tx_ring_num; i++) {
 914                 mlx4_en_deactivate_tx_ring(priv, &priv->tx_ring[i]);
 915                 mlx4_en_deactivate_cq(priv, &priv->tx_cq[i]);
 916         }
 917         msleep(10);
 918
 919         for (i = 0; i < priv->tx_ring_num; i++)
 920                 mlx4_en_free_tx_buf(dev, &priv->tx_ring[i]);
 921
 922         /* Free RSS qps */
 923         mlx4_en_release_rss_steer(priv);
 924
 925         /* Unregister Mac address for the port */
 926         mlx4_put_eth_qp(mdev->dev, priv->port, priv->mac, priv->base_qpn);
 927         mdev->mac_removed[priv->port] = 1;
 928
 929         /* Free RX Rings */
 930         for (i = 0; i < priv->rx_ring_num; i++) {
 931                 mlx4_en_deactivate_rx_ring(priv, &priv->rx_ring[i]);
 932                 while (test_bit(NAPI_STATE_SCHED, &priv->rx_cq[i].napi.state))
 933                         msleep(1);
 934                 mlx4_en_deactivate_cq(priv, &priv->rx_cq[i]);
 935         }
 936
 937         /* close port*/
 938         mlx4_CLOSE_PORT(mdev->dev, priv->port);
 939 }
 940
 941 static void mlx4_en_restart(struct work_struct *work)
 942 {
 943         struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
 944                                                  watchdog_task);
 945         struct mlx4_en_dev *mdev = priv->mdev;
 946         struct net_device *dev = priv->dev;
 947         int i;
 948
 949         en_dbg(DRV, priv, "Watchdog task called for port %d\n", priv->port);
 950
 951         mutex_lock(&mdev->state_lock);
 952         if (priv->port_up) {
 953                 mlx4_en_stop_port(dev);
 954                 for (i = 0; i < priv->tx_ring_num; i++)
 955                         netdev_tx_reset_queue(priv->tx_ring[i].tx_queue);
 956                 if (mlx4_en_start_port(dev))
 957                         en_err(priv, "Failed restarting port %d\n", priv->port);
 958         }
 959         mutex_unlock(&mdev->state_lock);
 960 }
 961
 962 static void mlx4_en_clear_stats(struct net_device *dev)
 963 {
 964         struct mlx4_en_priv *priv = netdev_priv(dev);
 965         struct mlx4_en_dev *mdev = priv->mdev;
 966         int i;
 967
 968         if (mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 1))
 969                 en_dbg(HW, priv, "Failed dumping statistics\n");
 970
 971         memset(&priv->stats, 0, sizeof(priv->stats));
 972         memset(&priv->pstats, 0, sizeof(priv->pstats));
 973         memset(&priv->pkstats, 0, sizeof(priv->pkstats));
 974         memset(&priv->port_stats, 0, sizeof(priv->port_stats));
 975
 976         for (i = 0; i < priv->tx_ring_num; i++) {
 977                 priv->tx_ring[i].bytes = 0;
 978                 priv->tx_ring[i].packets = 0;
 979                 priv->tx_ring[i].tx_csum = 0;
 980         }
 981         for (i = 0; i < priv->rx_ring_num; i++) {
 982                 priv->rx_ring[i].bytes = 0;
 983                 priv->rx_ring[i].packets = 0;
 984                 priv->rx_ring[i].csum_ok = 0;
 985                 priv->rx_ring[i].csum_none = 0;
 986         }
 987 }
 988
 989 static int mlx4_en_open(struct net_device *dev)
 990 {
 991         struct mlx4_en_priv *priv = netdev_priv(dev);
 992         struct mlx4_en_dev *mdev = priv->mdev;
 993         int err = 0;
 994
 995         mutex_lock(&mdev->state_lock);
 996
 997         if (!mdev->device_up) {
 998                 en_err(priv, "Cannot open - device down/disabled\n");
 999                 err = -EBUSY;
1000                 goto out;
1001         }
1002
1003         /* Reset HW statistics and SW counters */
1004         mlx4_en_clear_stats(dev);
1005
1006         err = mlx4_en_start_port(dev);
1007         if (err)
1008                 en_err(priv, "Failed starting port:%d\n", priv->port);
1009
1010 out:
1011         mutex_unlock(&mdev->state_lock);
1012         return err;
1013 }
1014
1015
1016 static int mlx4_en_close(struct net_device *dev)
1017 {
1018         struct mlx4_en_priv *priv = netdev_priv(dev);
1019         struct mlx4_en_dev *mdev = priv->mdev;
1020
1021         en_dbg(IFDOWN, priv, "Close port called\n");
1022
1023         mutex_lock(&mdev->state_lock);
1024
1025         mlx4_en_stop_port(dev);
1026         netif_carrier_off(dev);
1027
1028         mutex_unlock(&mdev->state_lock);
1029         return 0;
1030 }
1031
1032 void mlx4_en_free_resources(struct mlx4_en_priv *priv)
1033 {
1034         int i;
1035
1036         for (i = 0; i < priv->tx_ring_num; i++) {
1037                 if (priv->tx_ring[i].tx_info)
1038                         mlx4_en_destroy_tx_ring(priv, &priv->tx_ring[i]);
1039                 if (priv->tx_cq[i].buf)
1040                         mlx4_en_destroy_cq(priv, &priv->tx_cq[i]);
1041         }
1042
1043         for (i = 0; i < priv->rx_ring_num; i++) {
1044                 if (priv->rx_ring[i].rx_info)
1045                         mlx4_en_destroy_rx_ring(priv, &priv->rx_ring[i],
1046                                 priv->prof->rx_ring_size, priv->stride);
1047                 if (priv->rx_cq[i].buf)
1048                         mlx4_en_destroy_cq(priv, &priv->rx_cq[i]);
1049         }
1050
1051         if (priv->base_tx_qpn) {
1052                 mlx4_qp_release_range(priv->mdev->dev, priv->base_tx_qpn, priv->tx_ring_num);
1053                 priv->base_tx_qpn = 0;
1054         }
1055 }
1056
1057 int mlx4_en_alloc_resources(struct mlx4_en_priv *priv)
1058 {
1059         struct mlx4_en_port_profile *prof = priv->prof;
1060         int i;
1061         int err;
1062
1063         err = mlx4_qp_reserve_range(priv->mdev->dev, priv->tx_ring_num, 256, &priv->base_tx_qpn);
1064         if (err) {
1065                 en_err(priv, "failed reserving range for TX rings\n");
1066                 return err;
1067         }
1068
1069         /* Create tx Rings */
1070         for (i = 0; i < priv->tx_ring_num; i++) {
1071                 if (mlx4_en_create_cq(priv, &priv->tx_cq[i],
1072                                       prof->tx_ring_size, i, TX))
1073                         goto err;
1074
1075                 if (mlx4_en_create_tx_ring(priv, &priv->tx_ring[i], priv->base_tx_qpn + i,
1076                                            prof->tx_ring_size, TXBB_SIZE))
1077                         goto err;
1078         }
1079
1080         /* Create rx Rings */
1081         for (i = 0; i < priv->rx_ring_num; i++) {
1082                 if (mlx4_en_create_cq(priv, &priv->rx_cq[i],
1083                                       prof->rx_ring_size, i, RX))
1084                         goto err;
1085
1086                 if (mlx4_en_create_rx_ring(priv, &priv->rx_ring[i],
1087                                            prof->rx_ring_size, priv->stride))
1088                         goto err;
1089         }
1090
1091         return 0;
1092
1093 err:
1094         en_err(priv, "Failed to allocate NIC resources\n");
1095         return -ENOMEM;
1096 }
1097
1098
1099 void mlx4_en_destroy_netdev(struct net_device *dev)
1100 {
1101         struct mlx4_en_priv *priv = netdev_priv(dev);
1102         struct mlx4_en_dev *mdev = priv->mdev;
1103
1104         en_dbg(DRV, priv, "Destroying netdev on port:%d\n", priv->port);
1105
1106         /* Unregister device - this will close the port if it was up */
1107         if (priv->registered)
1108                 unregister_netdev(dev);
1109
1110         if (priv->allocated)
1111                 mlx4_free_hwq_res(mdev->dev, &priv->res, MLX4_EN_PAGE_SIZE);
1112
1113         cancel_delayed_work(&priv->stats_task);
1114         /* flush any pending task for this netdev */
1115         flush_workqueue(mdev->workqueue);
1116
1117         /* Detach the netdev so tasks would not attempt to access it */
1118         mutex_lock(&mdev->state_lock);
1119         mdev->pndev[priv->port] = NULL;
1120         mutex_unlock(&mdev->state_lock);
1121
1122         mlx4_en_free_resources(priv);
1123
1124         kfree(priv->tx_ring);
1125         kfree(priv->tx_cq);
1126
1127         free_netdev(dev);
1128 }
1129
1130 static int mlx4_en_change_mtu(struct net_device *dev, int new_mtu)
1131 {
1132         struct mlx4_en_priv *priv = netdev_priv(dev);
1133         struct mlx4_en_dev *mdev = priv->mdev;
1134         int err = 0;
1135
1136         en_dbg(DRV, priv, "Change MTU called - current:%d new:%d\n",
1137                  dev->mtu, new_mtu);
1138
1139         if ((new_mtu < MLX4_EN_MIN_MTU) || (new_mtu > priv->max_mtu)) {
1140                 en_err(priv, "Bad MTU size:%d.\n", new_mtu);
1141                 return -EPERM;
1142         }
1143         dev->mtu = new_mtu;
1144
1145         if (netif_running(dev)) {
1146                 mutex_lock(&mdev->state_lock);
1147                 if (!mdev->device_up) {
1148                         /* NIC is probably restarting - let watchdog task reset
1149                          * the port */
1150                         en_dbg(DRV, priv, "Change MTU called with card down!?\n");
1151                 } else {
1152                         mlx4_en_stop_port(dev);
1153                         err = mlx4_en_start_port(dev);
1154                         if (err) {
1155                                 en_err(priv, "Failed restarting port:%d\n",
1156                                          priv->port);
1157                                 queue_work(mdev->workqueue, &priv->watchdog_task);
1158                         }
1159                 }
1160                 mutex_unlock(&mdev->state_lock);
1161         }
1162         return 0;
1163 }
1164
1165 static int mlx4_en_set_features(struct net_device *netdev,
1166                 netdev_features_t features)
1167 {
1168         struct mlx4_en_priv *priv = netdev_priv(netdev);
1169
1170         if (features & NETIF_F_LOOPBACK)
1171                 priv->ctrl_flags |= cpu_to_be32(MLX4_WQE_CTRL_FORCE_LOOPBACK);
1172         else
1173                 priv->ctrl_flags &=
1174                         cpu_to_be32(~MLX4_WQE_CTRL_FORCE_LOOPBACK);
1175
1176         return 0;
1177
1178 }
1179
1180 static const struct net_device_ops mlx4_netdev_ops = {
1181         .ndo_open               = mlx4_en_open,
1182         .ndo_stop               = mlx4_en_close,
1183         .ndo_start_xmit         = mlx4_en_xmit,
1184         .ndo_select_queue       = mlx4_en_select_queue,
1185         .ndo_get_stats          = mlx4_en_get_stats,
1186         .ndo_set_rx_mode        = mlx4_en_set_multicast,
1187         .ndo_set_mac_address    = mlx4_en_set_mac,
1188         .ndo_validate_addr      = eth_validate_addr,
1189         .ndo_change_mtu         = mlx4_en_change_mtu,
1190         .ndo_tx_timeout         = mlx4_en_tx_timeout,
1191         .ndo_vlan_rx_add_vid    = mlx4_en_vlan_rx_add_vid,
1192         .ndo_vlan_rx_kill_vid   = mlx4_en_vlan_rx_kill_vid,
1193 #ifdef CONFIG_NET_POLL_CONTROLLER
1194         .ndo_poll_controller    = mlx4_en_netpoll,
1195 #endif
1196         .ndo_set_features       = mlx4_en_set_features,
1197         .ndo_setup_tc           = mlx4_en_setup_tc,
1198 };
1199
1200 int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port,
1201                         struct mlx4_en_port_profile *prof)
1202 {
1203         struct net_device *dev;
1204         struct mlx4_en_priv *priv;
1205         int i;
1206         int err;
1207
1208         dev = alloc_etherdev_mqs(sizeof(struct mlx4_en_priv),
1209             prof->tx_ring_num, prof->rx_ring_num);
1210         if (dev == NULL)
1211                 return -ENOMEM;
1212
1213         SET_NETDEV_DEV(dev, &mdev->dev->pdev->dev);
1214         dev->dev_id =  port - 1;
1215
1216         /*
1217          * Initialize driver private data
1218          */
1219
1220         priv = netdev_priv(dev);
1221         memset(priv, 0, sizeof(struct mlx4_en_priv));
1222         priv->dev = dev;
1223         priv->mdev = mdev;
1224         priv->ddev = &mdev->pdev->dev;
1225         priv->prof = prof;
1226         priv->port = port;
1227         priv->port_up = false;
1228         priv->flags = prof->flags;
1229         priv->ctrl_flags = cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE |
1230                         MLX4_WQE_CTRL_SOLICITED);
1231         priv->tx_ring_num = prof->tx_ring_num;
1232         priv->tx_ring = kzalloc(sizeof(struct mlx4_en_tx_ring) *
1233                         priv->tx_ring_num, GFP_KERNEL);
1234         if (!priv->tx_ring) {
1235                 err = -ENOMEM;
1236                 goto out;
1237         }
1238         priv->tx_cq = kzalloc(sizeof(struct mlx4_en_cq) * priv->tx_ring_num,
1239                         GFP_KERNEL);
1240         if (!priv->tx_cq) {
1241                 err = -ENOMEM;
1242                 goto out;
1243         }
1244         priv->rx_ring_num = prof->rx_ring_num;
1245         priv->mac_index = -1;
1246         priv->msg_enable = MLX4_EN_MSG_LEVEL;
1247         spin_lock_init(&priv->stats_lock);
1248         INIT_WORK(&priv->mcast_task, mlx4_en_do_set_multicast);
1249         INIT_WORK(&priv->mac_task, mlx4_en_do_set_mac);
1250         INIT_WORK(&priv->watchdog_task, mlx4_en_restart);
1251         INIT_WORK(&priv->linkstate_task, mlx4_en_linkstate);
1252         INIT_DELAYED_WORK(&priv->stats_task, mlx4_en_do_get_stats);
1253 #ifdef CONFIG_MLX4_EN_DCB
1254         if (!mlx4_is_slave(priv->mdev->dev))
1255                 dev->dcbnl_ops = &mlx4_en_dcbnl_ops;
1256 #endif
1257
1258         /* Query for default mac and max mtu */
1259         priv->max_mtu = mdev->dev->caps.eth_mtu_cap[priv->port];
1260         priv->mac = mdev->dev->caps.def_mac[priv->port];
1261         if (ILLEGAL_MAC(priv->mac)) {
1262                 en_err(priv, "Port: %d, invalid mac burned: 0x%llx, quiting\n",
1263                          priv->port, priv->mac);
1264                 err = -EINVAL;
1265                 goto out;
1266         }
1267
1268         priv->stride = roundup_pow_of_two(sizeof(struct mlx4_en_rx_desc) +
1269                                           DS_SIZE * MLX4_EN_MAX_RX_FRAGS);
1270         err = mlx4_en_alloc_resources(priv);
1271         if (err)
1272                 goto out;
1273
1274         /* Allocate page for receive rings */
1275         err = mlx4_alloc_hwq_res(mdev->dev, &priv->res,
1276                                 MLX4_EN_PAGE_SIZE, MLX4_EN_PAGE_SIZE);
1277         if (err) {
1278                 en_err(priv, "Failed to allocate page for rx qps\n");
1279                 goto out;
1280         }
1281         priv->allocated = 1;
1282
1283         /*
1284          * Initialize netdev entry points
1285          */
1286         dev->netdev_ops = &mlx4_netdev_ops;
1287         dev->watchdog_timeo = MLX4_EN_WATCHDOG_TIMEOUT;
1288         netif_set_real_num_tx_queues(dev, priv->tx_ring_num);
1289         netif_set_real_num_rx_queues(dev, priv->rx_ring_num);
1290
1291         SET_ETHTOOL_OPS(dev, &mlx4_en_ethtool_ops);
1292
1293         /* Set defualt MAC */
1294         dev->addr_len = ETH_ALEN;
1295         for (i = 0; i < ETH_ALEN; i++) {
1296                 dev->dev_addr[ETH_ALEN - 1 - i] = (u8) (priv->mac >> (8 * i));
1297                 dev->perm_addr[ETH_ALEN - 1 - i] = (u8) (priv->mac >> (8 * i));
1298         }
1299
1300         /*
1301          * Set driver features
1302          */
1303         dev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1304         if (mdev->LSO_support)
1305                 dev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6;
1306
1307         dev->vlan_features = dev->hw_features;
1308
1309         dev->hw_features |= NETIF_F_RXCSUM | NETIF_F_RXHASH;
1310         dev->features = dev->hw_features | NETIF_F_HIGHDMA |
1311                         NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX |
1312                         NETIF_F_HW_VLAN_FILTER;
1313         dev->hw_features |= NETIF_F_LOOPBACK;
1314
1315         mdev->pndev[port] = dev;
1316
1317         netif_carrier_off(dev);
1318         err = register_netdev(dev);
1319         if (err) {
1320                 en_err(priv, "Netdev registration failed for port %d\n", port);
1321                 goto out;
1322         }
1323         priv->registered = 1;
1324
1325         en_warn(priv, "Using %d TX rings\n", prof->tx_ring_num);
1326         en_warn(priv, "Using %d RX rings\n", prof->rx_ring_num);
1327
1328         /* Configure port */
1329         mlx4_en_calc_rx_buf(dev);
1330         err = mlx4_SET_PORT_general(mdev->dev, priv->port,
1331                                     priv->rx_skb_size + ETH_FCS_LEN,
1332                                     prof->tx_pause, prof->tx_ppp,
1333                                     prof->rx_pause, prof->rx_ppp);
1334         if (err) {
1335                 en_err(priv, "Failed setting port general configurations "
1336                        "for port %d, with error %d\n", priv->port, err);
1337                 goto out;
1338         }
1339
1340         /* Init port */
1341         en_warn(priv, "Initializing port\n");
1342         err = mlx4_INIT_PORT(mdev->dev, priv->port);
1343         if (err) {
1344                 en_err(priv, "Failed Initializing port\n");
1345                 goto out;
1346         }
1347         mlx4_en_set_default_moderation(priv);
1348         queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);
1349         return 0;
1350
1351 out:
1352         mlx4_en_destroy_netdev(dev);
1353         return err;
1354 }
1355