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 #include <linux/hash.h>
  40 #include <net/ip.h>
  41
  42 #include <linux/mlx4/driver.h>
  43 #include <linux/mlx4/device.h>
  44 #include <linux/mlx4/cmd.h>
  45 #include <linux/mlx4/cq.h>
  46
  47 #include "mlx4_en.h"
  48 #include "en_port.h"
  49
  50 static int mlx4_en_setup_tc(struct net_device *dev, u8 up)
  51 {
  52         struct mlx4_en_priv *priv = netdev_priv(dev);
  53         int i;
  54         unsigned int q, offset = 0;
  55
  56         if (up && up != MLX4_EN_NUM_UP)
  57                 return -EINVAL;
  58
  59         netdev_set_num_tc(dev, up);
  60
  61         /* Partition Tx queues evenly amongst UP's */
  62         q = priv->tx_ring_num / up;
  63         for (i = 0; i < up; i++) {
  64                 netdev_set_tc_queue(dev, i, q, offset);
  65                 offset += q;
  66         }
  67
  68         return 0;
  69 }
  70
  71 #ifdef CONFIG_RFS_ACCEL
  72
  73 struct mlx4_en_filter {
  74         struct list_head next;
  75         struct work_struct work;
  76
  77         __be32 src_ip;
  78         __be32 dst_ip;
  79         __be16 src_port;
  80         __be16 dst_port;
  81
  82         int rxq_index;
  83         struct mlx4_en_priv *priv;
  84         u32 flow_id;                    /* RFS infrastructure id */
  85         int id;                         /* mlx4_en driver id */
  86         u64 reg_id;                     /* Flow steering API id */
  87         u8 activated;                   /* Used to prevent expiry before filter
  88                                          * is attached
  89                                          */
  90         struct hlist_node filter_chain;
  91 };
  92
  93 static void mlx4_en_filter_rfs_expire(struct mlx4_en_priv *priv);
  94
  95 static void mlx4_en_filter_work(struct work_struct *work)
  96 {
  97         struct mlx4_en_filter *filter = container_of(work,
  98                                                      struct mlx4_en_filter,
  99                                                      work);
 100         struct mlx4_en_priv *priv = filter->priv;
 101         struct mlx4_spec_list spec_tcp = {
 102                 .id = MLX4_NET_TRANS_RULE_ID_TCP,
 103                 {
 104                         .tcp_udp = {
 105                                 .dst_port = filter->dst_port,
 106                                 .dst_port_msk = (__force __be16)-1,
 107                                 .src_port = filter->src_port,
 108                                 .src_port_msk = (__force __be16)-1,
 109                         },
 110                 },
 111         };
 112         struct mlx4_spec_list spec_ip = {
 113                 .id = MLX4_NET_TRANS_RULE_ID_IPV4,
 114                 {
 115                         .ipv4 = {
 116                                 .dst_ip = filter->dst_ip,
 117                                 .dst_ip_msk = (__force __be32)-1,
 118                                 .src_ip = filter->src_ip,
 119                                 .src_ip_msk = (__force __be32)-1,
 120                         },
 121                 },
 122         };
 123         struct mlx4_spec_list spec_eth = {
 124                 .id = MLX4_NET_TRANS_RULE_ID_ETH,
 125         };
 126         struct mlx4_net_trans_rule rule = {
 127                 .list = LIST_HEAD_INIT(rule.list),
 128                 .queue_mode = MLX4_NET_TRANS_Q_LIFO,
 129                 .exclusive = 1,
 130                 .allow_loopback = 1,
 131                 .promisc_mode = MLX4_FS_PROMISC_NONE,
 132                 .port = priv->port,
 133                 .priority = MLX4_DOMAIN_RFS,
 134         };
 135         int rc;
 136         __be64 mac;
 137         __be64 mac_mask = cpu_to_be64(MLX4_MAC_MASK << 16);
 138
 139         list_add_tail(&spec_eth.list, &rule.list);
 140         list_add_tail(&spec_ip.list, &rule.list);
 141         list_add_tail(&spec_tcp.list, &rule.list);
 142
 143         mac = cpu_to_be64((priv->mac & MLX4_MAC_MASK) << 16);
 144
 145         rule.qpn = priv->rss_map.qps[filter->rxq_index].qpn;
 146         memcpy(spec_eth.eth.dst_mac, &mac, ETH_ALEN);
 147         memcpy(spec_eth.eth.dst_mac_msk, &mac_mask, ETH_ALEN);
 148
 149         filter->activated = 0;
 150
 151         if (filter->reg_id) {
 152                 rc = mlx4_flow_detach(priv->mdev->dev, filter->reg_id);
 153                 if (rc && rc != -ENOENT)
 154                         en_err(priv, "Error detaching flow. rc = %d\n", rc);
 155         }
 156
 157         rc = mlx4_flow_attach(priv->mdev->dev, &rule, &filter->reg_id);
 158         if (rc)
 159                 en_err(priv, "Error attaching flow. err = %d\n", rc);
 160
 161         mlx4_en_filter_rfs_expire(priv);
 162
 163         filter->activated = 1;
 164 }
 165
 166 static inline struct hlist_head *
 167 filter_hash_bucket(struct mlx4_en_priv *priv, __be32 src_ip, __be32 dst_ip,
 168                    __be16 src_port, __be16 dst_port)
 169 {
 170         unsigned long l;
 171         int bucket_idx;
 172
 173         l = (__force unsigned long)src_port |
 174             ((__force unsigned long)dst_port << 2);
 175         l ^= (__force unsigned long)(src_ip ^ dst_ip);
 176
 177         bucket_idx = hash_long(l, MLX4_EN_FILTER_HASH_SHIFT);
 178
 179         return &priv->filter_hash[bucket_idx];
 180 }
 181
 182 static struct mlx4_en_filter *
 183 mlx4_en_filter_alloc(struct mlx4_en_priv *priv, int rxq_index, __be32 src_ip,
 184                      __be32 dst_ip, __be16 src_port, __be16 dst_port,
 185                      u32 flow_id)
 186 {
 187         struct mlx4_en_filter *filter = NULL;
 188
 189         filter = kzalloc(sizeof(struct mlx4_en_filter), GFP_ATOMIC);
 190         if (!filter)
 191                 return NULL;
 192
 193         filter->priv = priv;
 194         filter->rxq_index = rxq_index;
 195         INIT_WORK(&filter->work, mlx4_en_filter_work);
 196
 197         filter->src_ip = src_ip;
 198         filter->dst_ip = dst_ip;
 199         filter->src_port = src_port;
 200         filter->dst_port = dst_port;
 201
 202         filter->flow_id = flow_id;
 203
 204         filter->id = priv->last_filter_id++ % RPS_NO_FILTER;
 205
 206         list_add_tail(&filter->next, &priv->filters);
 207         hlist_add_head(&filter->filter_chain,
 208                        filter_hash_bucket(priv, src_ip, dst_ip, src_port,
 209                                           dst_port));
 210
 211         return filter;
 212 }
 213
 214 static void mlx4_en_filter_free(struct mlx4_en_filter *filter)
 215 {
 216         struct mlx4_en_priv *priv = filter->priv;
 217         int rc;
 218
 219         list_del(&filter->next);
 220
 221         rc = mlx4_flow_detach(priv->mdev->dev, filter->reg_id);
 222         if (rc && rc != -ENOENT)
 223                 en_err(priv, "Error detaching flow. rc = %d\n", rc);
 224
 225         kfree(filter);
 226 }
 227
 228 static inline struct mlx4_en_filter *
 229 mlx4_en_filter_find(struct mlx4_en_priv *priv, __be32 src_ip, __be32 dst_ip,
 230                     __be16 src_port, __be16 dst_port)
 231 {
 232         struct hlist_node *elem;
 233         struct mlx4_en_filter *filter;
 234         struct mlx4_en_filter *ret = NULL;
 235
 236         hlist_for_each_entry(filter, elem,
 237                              filter_hash_bucket(priv, src_ip, dst_ip,
 238                                                 src_port, dst_port),
 239                              filter_chain) {
 240                 if (filter->src_ip == src_ip &&
 241                     filter->dst_ip == dst_ip &&
 242                     filter->src_port == src_port &&
 243                     filter->dst_port == dst_port) {
 244                         ret = filter;
 245                         break;
 246                 }
 247         }
 248
 249         return ret;
 250 }
 251
 252 static int
 253 mlx4_en_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb,
 254                    u16 rxq_index, u32 flow_id)
 255 {
 256         struct mlx4_en_priv *priv = netdev_priv(net_dev);
 257         struct mlx4_en_filter *filter;
 258         const struct iphdr *ip;
 259         const __be16 *ports;
 260         __be32 src_ip;
 261         __be32 dst_ip;
 262         __be16 src_port;
 263         __be16 dst_port;
 264         int nhoff = skb_network_offset(skb);
 265         int ret = 0;
 266
 267         if (skb->protocol != htons(ETH_P_IP))
 268                 return -EPROTONOSUPPORT;
 269
 270         ip = (const struct iphdr *)(skb->data + nhoff);
 271         if (ip_is_fragment(ip))
 272                 return -EPROTONOSUPPORT;
 273
 274         ports = (const __be16 *)(skb->data + nhoff + 4 * ip->ihl);
 275
 276         src_ip = ip->saddr;
 277         dst_ip = ip->daddr;
 278         src_port = ports[0];
 279         dst_port = ports[1];
 280
 281         if (ip->protocol != IPPROTO_TCP)
 282                 return -EPROTONOSUPPORT;
 283
 284         spin_lock_bh(&priv->filters_lock);
 285         filter = mlx4_en_filter_find(priv, src_ip, dst_ip, src_port, dst_port);
 286         if (filter) {
 287                 if (filter->rxq_index == rxq_index)
 288                         goto out;
 289
 290                 filter->rxq_index = rxq_index;
 291         } else {
 292                 filter = mlx4_en_filter_alloc(priv, rxq_index,
 293                                               src_ip, dst_ip,
 294                                               src_port, dst_port, flow_id);
 295                 if (!filter) {
 296                         ret = -ENOMEM;
 297                         goto err;
 298                 }
 299         }
 300
 301         queue_work(priv->mdev->workqueue, &filter->work);
 302
 303 out:
 304         ret = filter->id;
 305 err:
 306         spin_unlock_bh(&priv->filters_lock);
 307
 308         return ret;
 309 }
 310
 311 void mlx4_en_cleanup_filters(struct mlx4_en_priv *priv,
 312                              struct mlx4_en_rx_ring *rx_ring)
 313 {
 314         struct mlx4_en_filter *filter, *tmp;
 315         LIST_HEAD(del_list);
 316
 317         spin_lock_bh(&priv->filters_lock);
 318         list_for_each_entry_safe(filter, tmp, &priv->filters, next) {
 319                 list_move(&filter->next, &del_list);
 320                 hlist_del(&filter->filter_chain);
 321         }
 322         spin_unlock_bh(&priv->filters_lock);
 323
 324         list_for_each_entry_safe(filter, tmp, &del_list, next) {
 325                 cancel_work_sync(&filter->work);
 326                 mlx4_en_filter_free(filter);
 327         }
 328 }
 329
 330 static void mlx4_en_filter_rfs_expire(struct mlx4_en_priv *priv)
 331 {
 332         struct mlx4_en_filter *filter = NULL, *tmp, *last_filter = NULL;
 333         LIST_HEAD(del_list);
 334         int i = 0;
 335
 336         spin_lock_bh(&priv->filters_lock);
 337         list_for_each_entry_safe(filter, tmp, &priv->filters, next) {
 338                 if (i > MLX4_EN_FILTER_EXPIRY_QUOTA)
 339                         break;
 340
 341                 if (filter->activated &&
 342                     !work_pending(&filter->work) &&
 343                     rps_may_expire_flow(priv->dev,
 344                                         filter->rxq_index, filter->flow_id,
 345                                         filter->id)) {
 346                         list_move(&filter->next, &del_list);
 347                         hlist_del(&filter->filter_chain);
 348                 } else
 349                         last_filter = filter;
 350
 351                 i++;
 352         }
 353
 354         if (last_filter && (&last_filter->next != priv->filters.next))
 355                 list_move(&priv->filters, &last_filter->next);
 356
 357         spin_unlock_bh(&priv->filters_lock);
 358
 359         list_for_each_entry_safe(filter, tmp, &del_list, next)
 360                 mlx4_en_filter_free(filter);
 361 }
 362 #endif
 363
 364 static int mlx4_en_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
 365 {
 366         struct mlx4_en_priv *priv = netdev_priv(dev);
 367         struct mlx4_en_dev *mdev = priv->mdev;
 368         int err;
 369         int idx;
 370
 371         en_dbg(HW, priv, "adding VLAN:%d\n", vid);
 372
 373         set_bit(vid, priv->active_vlans);
 374
 375         /* Add VID to port VLAN filter */
 376         mutex_lock(&mdev->state_lock);
 377         if (mdev->device_up && priv->port_up) {
 378                 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv);
 379                 if (err)
 380                         en_err(priv, "Failed configuring VLAN filter\n");
 381         }
 382         if (mlx4_register_vlan(mdev->dev, priv->port, vid, &idx))
 383                 en_err(priv, "failed adding vlan %d\n", vid);
 384         mutex_unlock(&mdev->state_lock);
 385
 386         return 0;
 387 }
 388
 389 static int mlx4_en_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
 390 {
 391         struct mlx4_en_priv *priv = netdev_priv(dev);
 392         struct mlx4_en_dev *mdev = priv->mdev;
 393         int err;
 394         int idx;
 395
 396         en_dbg(HW, priv, "Killing VID:%d\n", vid);
 397
 398         clear_bit(vid, priv->active_vlans);
 399
 400         /* Remove VID from port VLAN filter */
 401         mutex_lock(&mdev->state_lock);
 402         if (!mlx4_find_cached_vlan(mdev->dev, priv->port, vid, &idx))
 403                 mlx4_unregister_vlan(mdev->dev, priv->port, idx);
 404         else
 405                 en_err(priv, "could not find vid %d in cache\n", vid);
 406
 407         if (mdev->device_up && priv->port_up) {
 408                 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv);
 409                 if (err)
 410                         en_err(priv, "Failed configuring VLAN filter\n");
 411         }
 412         mutex_unlock(&mdev->state_lock);
 413
 414         return 0;
 415 }
 416
 417 u64 mlx4_en_mac_to_u64(u8 *addr)
 418 {
 419         u64 mac = 0;
 420         int i;
 421
 422         for (i = 0; i < ETH_ALEN; i++) {
 423                 mac <<= 8;
 424                 mac |= addr[i];
 425         }
 426         return mac;
 427 }
 428
 429 static int mlx4_en_set_mac(struct net_device *dev, void *addr)
 430 {
 431         struct mlx4_en_priv *priv = netdev_priv(dev);
 432         struct mlx4_en_dev *mdev = priv->mdev;
 433         struct sockaddr *saddr = addr;
 434
 435         if (!is_valid_ether_addr(saddr->sa_data))
 436                 return -EADDRNOTAVAIL;
 437
 438         memcpy(dev->dev_addr, saddr->sa_data, ETH_ALEN);
 439         priv->mac = mlx4_en_mac_to_u64(dev->dev_addr);
 440         queue_work(mdev->workqueue, &priv->mac_task);
 441         return 0;
 442 }
 443
 444 static void mlx4_en_do_set_mac(struct work_struct *work)
 445 {
 446         struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
 447                                                  mac_task);
 448         struct mlx4_en_dev *mdev = priv->mdev;
 449         int err = 0;
 450
 451         mutex_lock(&mdev->state_lock);
 452         if (priv->port_up) {
 453                 /* Remove old MAC and insert the new one */
 454                 err = mlx4_replace_mac(mdev->dev, priv->port,
 455                                        priv->base_qpn, priv->mac);
 456                 if (err)
 457                         en_err(priv, "Failed changing HW MAC address\n");
 458         } else
 459                 en_dbg(HW, priv, "Port is down while "
 460                                  "registering mac, exiting...\n");
 461
 462         mutex_unlock(&mdev->state_lock);
 463 }
 464
 465 static void mlx4_en_clear_list(struct net_device *dev)
 466 {
 467         struct mlx4_en_priv *priv = netdev_priv(dev);
 468         struct mlx4_en_mc_list *tmp, *mc_to_del;
 469
 470         list_for_each_entry_safe(mc_to_del, tmp, &priv->mc_list, list) {
 471                 list_del(&mc_to_del->list);
 472                 kfree(mc_to_del);
 473         }
 474 }
 475
 476 static void mlx4_en_cache_mclist(struct net_device *dev)
 477 {
 478         struct mlx4_en_priv *priv = netdev_priv(dev);
 479         struct netdev_hw_addr *ha;
 480         struct mlx4_en_mc_list *tmp;
 481
 482         mlx4_en_clear_list(dev);
 483         netdev_for_each_mc_addr(ha, dev) {
 484                 tmp = kzalloc(sizeof(struct mlx4_en_mc_list), GFP_ATOMIC);
 485                 if (!tmp) {
 486                         en_err(priv, "failed to allocate multicast list\n");
 487                         mlx4_en_clear_list(dev);
 488                         return;
 489                 }
 490                 memcpy(tmp->addr, ha->addr, ETH_ALEN);
 491                 list_add_tail(&tmp->list, &priv->mc_list);
 492         }
 493 }
 494
 495 static void update_mclist_flags(struct mlx4_en_priv *priv,
 496                                 struct list_head *dst,
 497                                 struct list_head *src)
 498 {
 499         struct mlx4_en_mc_list *dst_tmp, *src_tmp, *new_mc;
 500         bool found;
 501
 502         /* Find all the entries that should be removed from dst,
 503          * These are the entries that are not found in src
 504          */
 505         list_for_each_entry(dst_tmp, dst, list) {
 506                 found = false;
 507                 list_for_each_entry(src_tmp, src, list) {
 508                         if (!memcmp(dst_tmp->addr, src_tmp->addr, ETH_ALEN)) {
 509                                 found = true;
 510                                 break;
 511                         }
 512                 }
 513                 if (!found)
 514                         dst_tmp->action = MCLIST_REM;
 515         }
 516
 517         /* Add entries that exist in src but not in dst
 518          * mark them as need to add
 519          */
 520         list_for_each_entry(src_tmp, src, list) {
 521                 found = false;
 522                 list_for_each_entry(dst_tmp, dst, list) {
 523                         if (!memcmp(dst_tmp->addr, src_tmp->addr, ETH_ALEN)) {
 524                                 dst_tmp->action = MCLIST_NONE;
 525                                 found = true;
 526                                 break;
 527                         }
 528                 }
 529                 if (!found) {
 530                         new_mc = kmalloc(sizeof(struct mlx4_en_mc_list),
 531                                          GFP_KERNEL);
 532                         if (!new_mc) {
 533                                 en_err(priv, "Failed to allocate current multicast list\n");
 534                                 return;
 535                         }
 536                         memcpy(new_mc, src_tmp,
 537                                sizeof(struct mlx4_en_mc_list));
 538                         new_mc->action = MCLIST_ADD;
 539                         list_add_tail(&new_mc->list, dst);
 540                 }
 541         }
 542 }
 543
 544 static void mlx4_en_set_multicast(struct net_device *dev)
 545 {
 546         struct mlx4_en_priv *priv = netdev_priv(dev);
 547
 548         if (!priv->port_up)
 549                 return;
 550
 551         queue_work(priv->mdev->workqueue, &priv->mcast_task);
 552 }
 553
 554 static void mlx4_en_do_set_multicast(struct work_struct *work)
 555 {
 556         struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
 557                                                  mcast_task);
 558         struct mlx4_en_dev *mdev = priv->mdev;
 559         struct net_device *dev = priv->dev;
 560         struct mlx4_en_mc_list *mclist, *tmp;
 561         u64 mcast_addr = 0;
 562         u8 mc_list[16] = {0};
 563         int err = 0;
 564
 565         mutex_lock(&mdev->state_lock);
 566         if (!mdev->device_up) {
 567                 en_dbg(HW, priv, "Card is not up, "
 568                                  "ignoring multicast change.\n");
 569                 goto out;
 570         }
 571         if (!priv->port_up) {
 572                 en_dbg(HW, priv, "Port is down, "
 573                                  "ignoring  multicast change.\n");
 574                 goto out;
 575         }
 576
 577         if (!netif_carrier_ok(dev)) {
 578                 if (!mlx4_en_QUERY_PORT(mdev, priv->port)) {
 579                         if (priv->port_state.link_state) {
 580                                 priv->last_link_state = MLX4_DEV_EVENT_PORT_UP;
 581                                 netif_carrier_on(dev);
 582                                 en_dbg(LINK, priv, "Link Up\n");
 583                         }
 584                 }
 585         }
 586
 587         /*
 588          * Promsicuous mode: disable all filters
 589          */
 590
 591         if (dev->flags & IFF_PROMISC) {
 592                 if (!(priv->flags & MLX4_EN_FLAG_PROMISC)) {
 593                         if (netif_msg_rx_status(priv))
 594                                 en_warn(priv, "Entering promiscuous mode\n");
 595                         priv->flags |= MLX4_EN_FLAG_PROMISC;
 596
 597                         /* Enable promiscouos mode */
 598                         switch (mdev->dev->caps.steering_mode) {
 599                         case MLX4_STEERING_MODE_DEVICE_MANAGED:
 600                                 err = mlx4_flow_steer_promisc_add(mdev->dev,
 601                                                                   priv->port,
 602                                                                   priv->base_qpn,
 603                                                                   MLX4_FS_PROMISC_UPLINK);
 604                                 if (err)
 605                                         en_err(priv, "Failed enabling promiscuous mode\n");
 606                                 priv->flags |= MLX4_EN_FLAG_MC_PROMISC;
 607                                 break;
 608
 609                         case MLX4_STEERING_MODE_B0:
 610                                 err = mlx4_unicast_promisc_add(mdev->dev,
 611                                                                priv->base_qpn,
 612                                                                priv->port);
 613                                 if (err)
 614                                         en_err(priv, "Failed enabling unicast promiscuous mode\n");
 615
 616                                 /* Add the default qp number as multicast
 617                                  * promisc
 618                                  */
 619                                 if (!(priv->flags & MLX4_EN_FLAG_MC_PROMISC)) {
 620                                         err = mlx4_multicast_promisc_add(mdev->dev,
 621                                                                          priv->base_qpn,
 622                                                                          priv->port);
 623                                         if (err)
 624                                                 en_err(priv, "Failed enabling multicast promiscuous mode\n");
 625                                         priv->flags |= MLX4_EN_FLAG_MC_PROMISC;
 626                                 }
 627                                 break;
 628
 629                         case MLX4_STEERING_MODE_A0:
 630                                 err = mlx4_SET_PORT_qpn_calc(mdev->dev,
 631                                                              priv->port,
 632                                                              priv->base_qpn,
 633                                                              1);
 634                                 if (err)
 635                                         en_err(priv, "Failed enabling promiscuous mode\n");
 636                                 break;
 637                         }
 638
 639                         /* Disable port multicast filter (unconditionally) */
 640                         err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
 641                                                   0, MLX4_MCAST_DISABLE);
 642                         if (err)
 643                                 en_err(priv, "Failed disabling "
 644                                              "multicast filter\n");
 645
 646                         /* Disable port VLAN filter */
 647                         err = mlx4_SET_VLAN_FLTR(mdev->dev, priv);
 648                         if (err)
 649                                 en_err(priv, "Failed disabling VLAN filter\n");
 650                 }
 651                 goto out;
 652         }
 653
 654         /*
 655          * Not in promiscuous mode
 656          */
 657
 658         if (priv->flags & MLX4_EN_FLAG_PROMISC) {
 659                 if (netif_msg_rx_status(priv))
 660                         en_warn(priv, "Leaving promiscuous mode\n");
 661                 priv->flags &= ~MLX4_EN_FLAG_PROMISC;
 662
 663                 /* Disable promiscouos mode */
 664                 switch (mdev->dev->caps.steering_mode) {
 665                 case MLX4_STEERING_MODE_DEVICE_MANAGED:
 666                         err = mlx4_flow_steer_promisc_remove(mdev->dev,
 667                                                              priv->port,
 668                                                              MLX4_FS_PROMISC_UPLINK);
 669                         if (err)
 670                                 en_err(priv, "Failed disabling promiscuous mode\n");
 671                         priv->flags &= ~MLX4_EN_FLAG_MC_PROMISC;
 672                         break;
 673
 674                 case MLX4_STEERING_MODE_B0:
 675                         err = mlx4_unicast_promisc_remove(mdev->dev,
 676                                                           priv->base_qpn,
 677                                                           priv->port);
 678                         if (err)
 679                                 en_err(priv, "Failed disabling unicast promiscuous mode\n");
 680                         /* Disable Multicast promisc */
 681                         if (priv->flags & MLX4_EN_FLAG_MC_PROMISC) {
 682                                 err = mlx4_multicast_promisc_remove(mdev->dev,
 683                                                                     priv->base_qpn,
 684                                                                     priv->port);
 685                                 if (err)
 686                                         en_err(priv, "Failed disabling multicast promiscuous mode\n");
 687                                 priv->flags &= ~MLX4_EN_FLAG_MC_PROMISC;
 688                         }
 689                         break;
 690
 691                 case MLX4_STEERING_MODE_A0:
 692                         err = mlx4_SET_PORT_qpn_calc(mdev->dev,
 693                                                      priv->port,
 694                                                      priv->base_qpn, 0);
 695                         if (err)
 696                                 en_err(priv, "Failed disabling promiscuous mode\n");
 697                         break;
 698                 }
 699
 700                 /* Enable port VLAN filter */
 701                 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv);
 702                 if (err)
 703                         en_err(priv, "Failed enabling VLAN filter\n");
 704         }
 705
 706         /* Enable/disable the multicast filter according to IFF_ALLMULTI */
 707         if (dev->flags & IFF_ALLMULTI) {
 708                 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
 709                                           0, MLX4_MCAST_DISABLE);
 710                 if (err)
 711                         en_err(priv, "Failed disabling multicast filter\n");
 712
 713                 /* Add the default qp number as multicast promisc */
 714                 if (!(priv->flags & MLX4_EN_FLAG_MC_PROMISC)) {
 715                         switch (mdev->dev->caps.steering_mode) {
 716                         case MLX4_STEERING_MODE_DEVICE_MANAGED:
 717                                 err = mlx4_flow_steer_promisc_add(mdev->dev,
 718                                                                   priv->port,
 719                                                                   priv->base_qpn,
 720                                                                   MLX4_FS_PROMISC_ALL_MULTI);
 721                                 break;
 722
 723                         case MLX4_STEERING_MODE_B0:
 724                                 err = mlx4_multicast_promisc_add(mdev->dev,
 725                                                                  priv->base_qpn,
 726                                                                  priv->port);
 727                                 break;
 728
 729                         case MLX4_STEERING_MODE_A0:
 730                                 break;
 731                         }
 732                         if (err)
 733                                 en_err(priv, "Failed entering multicast promisc mode\n");
 734                         priv->flags |= MLX4_EN_FLAG_MC_PROMISC;
 735                 }
 736         } else {
 737                 /* Disable Multicast promisc */
 738                 if (priv->flags & MLX4_EN_FLAG_MC_PROMISC) {
 739                         switch (mdev->dev->caps.steering_mode) {
 740                         case MLX4_STEERING_MODE_DEVICE_MANAGED:
 741                                 err = mlx4_flow_steer_promisc_remove(mdev->dev,
 742                                                                      priv->port,
 743                                                                      MLX4_FS_PROMISC_ALL_MULTI);
 744                                 break;
 745
 746                         case MLX4_STEERING_MODE_B0:
 747                                 err = mlx4_multicast_promisc_remove(mdev->dev,
 748                                                                     priv->base_qpn,
 749                                                                     priv->port);
 750                                 break;
 751
 752                         case MLX4_STEERING_MODE_A0:
 753                                 break;
 754                         }
 755                         if (err)
 756                                 en_err(priv, "Failed disabling multicast promiscuous mode\n");
 757                         priv->flags &= ~MLX4_EN_FLAG_MC_PROMISC;
 758                 }
 759
 760                 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
 761                                           0, MLX4_MCAST_DISABLE);
 762                 if (err)
 763                         en_err(priv, "Failed disabling multicast filter\n");
 764
 765                 /* Flush mcast filter and init it with broadcast address */
 766                 mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, ETH_BCAST,
 767                                     1, MLX4_MCAST_CONFIG);
 768
 769                 /* Update multicast list - we cache all addresses so they won't
 770                  * change while HW is updated holding the command semaphor */
 771                 netif_tx_lock_bh(dev);
 772                 mlx4_en_cache_mclist(dev);
 773                 netif_tx_unlock_bh(dev);
 774                 list_for_each_entry(mclist, &priv->mc_list, list) {
 775                         mcast_addr = mlx4_en_mac_to_u64(mclist->addr);
 776                         mlx4_SET_MCAST_FLTR(mdev->dev, priv->port,
 777                                             mcast_addr, 0, MLX4_MCAST_CONFIG);
 778                 }
 779                 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
 780                                           0, MLX4_MCAST_ENABLE);
 781                 if (err)
 782                         en_err(priv, "Failed enabling multicast filter\n");
 783
 784                 update_mclist_flags(priv, &priv->curr_list, &priv->mc_list);
 785                 list_for_each_entry_safe(mclist, tmp, &priv->curr_list, list) {
 786                         if (mclist->action == MCLIST_REM) {
 787                                 /* detach this address and delete from list */
 788                                 memcpy(&mc_list[10], mclist->addr, ETH_ALEN);
 789                                 mc_list[5] = priv->port;
 790                                 err = mlx4_multicast_detach(mdev->dev,
 791                                                             &priv->rss_map.indir_qp,
 792                                                             mc_list,
 793                                                             MLX4_PROT_ETH,
 794                                                             mclist->reg_id);
 795                                 if (err)
 796                                         en_err(priv, "Fail to detach multicast address\n");
 797
 798                                 /* remove from list */
 799                                 list_del(&mclist->list);
 800                                 kfree(mclist);
 801                         } else if (mclist->action == MCLIST_ADD) {
 802                                 /* attach the address */
 803                                 memcpy(&mc_list[10], mclist->addr, ETH_ALEN);
 804                                 /* needed for B0 steering support */
 805                                 mc_list[5] = priv->port;
 806                                 err = mlx4_multicast_attach(mdev->dev,
 807                                                             &priv->rss_map.indir_qp,
 808                                                             mc_list,
 809                                                             priv->port, 0,
 810                                                             MLX4_PROT_ETH,
 811                                                             &mclist->reg_id);
 812                                 if (err)
 813                                         en_err(priv, "Fail to attach multicast address\n");
 814
 815                         }
 816                 }
 817         }
 818 out:
 819         mutex_unlock(&mdev->state_lock);
 820 }
 821
 822 #ifdef CONFIG_NET_POLL_CONTROLLER
 823 static void mlx4_en_netpoll(struct net_device *dev)
 824 {
 825         struct mlx4_en_priv *priv = netdev_priv(dev);
 826         struct mlx4_en_cq *cq;
 827         unsigned long flags;
 828         int i;
 829
 830         for (i = 0; i < priv->rx_ring_num; i++) {
 831                 cq = &priv->rx_cq[i];
 832                 spin_lock_irqsave(&cq->lock, flags);
 833                 napi_synchronize(&cq->napi);
 834                 mlx4_en_process_rx_cq(dev, cq, 0);
 835                 spin_unlock_irqrestore(&cq->lock, flags);
 836         }
 837 }
 838 #endif
 839
 840 static void mlx4_en_tx_timeout(struct net_device *dev)
 841 {
 842         struct mlx4_en_priv *priv = netdev_priv(dev);
 843         struct mlx4_en_dev *mdev = priv->mdev;
 844
 845         if (netif_msg_timer(priv))
 846                 en_warn(priv, "Tx timeout called on port:%d\n", priv->port);
 847
 848         priv->port_stats.tx_timeout++;
 849         en_dbg(DRV, priv, "Scheduling watchdog\n");
 850         queue_work(mdev->workqueue, &priv->watchdog_task);
 851 }
 852
 853
 854 static struct net_device_stats *mlx4_en_get_stats(struct net_device *dev)
 855 {
 856         struct mlx4_en_priv *priv = netdev_priv(dev);
 857
 858         spin_lock_bh(&priv->stats_lock);
 859         memcpy(&priv->ret_stats, &priv->stats, sizeof(priv->stats));
 860         spin_unlock_bh(&priv->stats_lock);
 861
 862         return &priv->ret_stats;
 863 }
 864
 865 static void mlx4_en_set_default_moderation(struct mlx4_en_priv *priv)
 866 {
 867         struct mlx4_en_cq *cq;
 868         int i;
 869
 870         /* If we haven't received a specific coalescing setting
 871          * (module param), we set the moderation parameters as follows:
 872          * - moder_cnt is set to the number of mtu sized packets to
 873          *   satisfy our coelsing target.
 874          * - moder_time is set to a fixed value.
 875          */
 876         priv->rx_frames = MLX4_EN_RX_COAL_TARGET;
 877         priv->rx_usecs = MLX4_EN_RX_COAL_TIME;
 878         priv->tx_frames = MLX4_EN_TX_COAL_PKTS;
 879         priv->tx_usecs = MLX4_EN_TX_COAL_TIME;
 880         en_dbg(INTR, priv, "Default coalesing params for mtu:%d - "
 881                            "rx_frames:%d rx_usecs:%d\n",
 882                  priv->dev->mtu, priv->rx_frames, priv->rx_usecs);
 883
 884         /* Setup cq moderation params */
 885         for (i = 0; i < priv->rx_ring_num; i++) {
 886                 cq = &priv->rx_cq[i];
 887                 cq->moder_cnt = priv->rx_frames;
 888                 cq->moder_time = priv->rx_usecs;
 889                 priv->last_moder_time[i] = MLX4_EN_AUTO_CONF;
 890                 priv->last_moder_packets[i] = 0;
 891                 priv->last_moder_bytes[i] = 0;
 892         }
 893
 894         for (i = 0; i < priv->tx_ring_num; i++) {
 895                 cq = &priv->tx_cq[i];
 896                 cq->moder_cnt = priv->tx_frames;
 897                 cq->moder_time = priv->tx_usecs;
 898         }
 899
 900         /* Reset auto-moderation params */
 901         priv->pkt_rate_low = MLX4_EN_RX_RATE_LOW;
 902         priv->rx_usecs_low = MLX4_EN_RX_COAL_TIME_LOW;
 903         priv->pkt_rate_high = MLX4_EN_RX_RATE_HIGH;
 904         priv->rx_usecs_high = MLX4_EN_RX_COAL_TIME_HIGH;
 905         priv->sample_interval = MLX4_EN_SAMPLE_INTERVAL;
 906         priv->adaptive_rx_coal = 1;
 907         priv->last_moder_jiffies = 0;
 908         priv->last_moder_tx_packets = 0;
 909 }
 910
 911 static void mlx4_en_auto_moderation(struct mlx4_en_priv *priv)
 912 {
 913         unsigned long period = (unsigned long) (jiffies - priv->last_moder_jiffies);
 914         struct mlx4_en_cq *cq;
 915         unsigned long packets;
 916         unsigned long rate;
 917         unsigned long avg_pkt_size;
 918         unsigned long rx_packets;
 919         unsigned long rx_bytes;
 920         unsigned long rx_pkt_diff;
 921         int moder_time;
 922         int ring, err;
 923
 924         if (!priv->adaptive_rx_coal || period < priv->sample_interval * HZ)
 925                 return;
 926
 927         for (ring = 0; ring < priv->rx_ring_num; ring++) {
 928                 spin_lock_bh(&priv->stats_lock);
 929                 rx_packets = priv->rx_ring[ring].packets;
 930                 rx_bytes = priv->rx_ring[ring].bytes;
 931                 spin_unlock_bh(&priv->stats_lock);
 932
 933                 rx_pkt_diff = ((unsigned long) (rx_packets -
 934                                 priv->last_moder_packets[ring]));
 935                 packets = rx_pkt_diff;
 936                 rate = packets * HZ / period;
 937                 avg_pkt_size = packets ? ((unsigned long) (rx_bytes -
 938                                 priv->last_moder_bytes[ring])) / packets : 0;
 939
 940                 /* Apply auto-moderation only when packet rate
 941                  * exceeds a rate that it matters */
 942                 if (rate > (MLX4_EN_RX_RATE_THRESH / priv->rx_ring_num) &&
 943                     avg_pkt_size > MLX4_EN_AVG_PKT_SMALL) {
 944                         if (rate < priv->pkt_rate_low)
 945                                 moder_time = priv->rx_usecs_low;
 946                         else if (rate > priv->pkt_rate_high)
 947                                 moder_time = priv->rx_usecs_high;
 948                         else
 949                                 moder_time = (rate - priv->pkt_rate_low) *
 950                                         (priv->rx_usecs_high - priv->rx_usecs_low) /
 951                                         (priv->pkt_rate_high - priv->pkt_rate_low) +
 952                                         priv->rx_usecs_low;
 953                 } else {
 954                         moder_time = priv->rx_usecs_low;
 955                 }
 956
 957                 if (moder_time != priv->last_moder_time[ring]) {
 958                         priv->last_moder_time[ring] = moder_time;
 959                         cq = &priv->rx_cq[ring];
 960                         cq->moder_time = moder_time;
 961                         err = mlx4_en_set_cq_moder(priv, cq);
 962                         if (err)
 963                                 en_err(priv, "Failed modifying moderation "
 964                                              "for cq:%d\n", ring);
 965                 }
 966                 priv->last_moder_packets[ring] = rx_packets;
 967                 priv->last_moder_bytes[ring] = rx_bytes;
 968         }
 969
 970         priv->last_moder_jiffies = jiffies;
 971 }
 972
 973 static void mlx4_en_do_get_stats(struct work_struct *work)
 974 {
 975         struct delayed_work *delay = to_delayed_work(work);
 976         struct mlx4_en_priv *priv = container_of(delay, struct mlx4_en_priv,
 977                                                  stats_task);
 978         struct mlx4_en_dev *mdev = priv->mdev;
 979         int err;
 980
 981         err = mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 0);
 982         if (err)
 983                 en_dbg(HW, priv, "Could not update stats\n");
 984
 985         mutex_lock(&mdev->state_lock);
 986         if (mdev->device_up) {
 987                 if (priv->port_up)
 988                         mlx4_en_auto_moderation(priv);
 989
 990                 queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);
 991         }
 992         if (mdev->mac_removed[MLX4_MAX_PORTS + 1 - priv->port]) {
 993                 queue_work(mdev->workqueue, &priv->mac_task);
 994                 mdev->mac_removed[MLX4_MAX_PORTS + 1 - priv->port] = 0;
 995         }
 996         mutex_unlock(&mdev->state_lock);
 997 }
 998
 999 static void mlx4_en_linkstate(struct work_struct *work)
1000 {
1001         struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
1002                                                  linkstate_task);
1003         struct mlx4_en_dev *mdev = priv->mdev;
1004         int linkstate = priv->link_state;
1005
1006         mutex_lock(&mdev->state_lock);
1007         /* If observable port state changed set carrier state and
1008          * report to system log */
1009         if (priv->last_link_state != linkstate) {
1010                 if (linkstate == MLX4_DEV_EVENT_PORT_DOWN) {
1011                         en_info(priv, "Link Down\n");
1012                         netif_carrier_off(priv->dev);
1013                 } else {
1014                         en_info(priv, "Link Up\n");
1015                         netif_carrier_on(priv->dev);
1016                 }
1017         }
1018         priv->last_link_state = linkstate;
1019         mutex_unlock(&mdev->state_lock);
1020 }
1021
1022
1023 int mlx4_en_start_port(struct net_device *dev)
1024 {
1025         struct mlx4_en_priv *priv = netdev_priv(dev);
1026         struct mlx4_en_dev *mdev = priv->mdev;
1027         struct mlx4_en_cq *cq;
1028         struct mlx4_en_tx_ring *tx_ring;
1029         int rx_index = 0;
1030         int tx_index = 0;
1031         int err = 0;
1032         int i;
1033         int j;
1034         u8 mc_list[16] = {0};
1035
1036         if (priv->port_up) {
1037                 en_dbg(DRV, priv, "start port called while port already up\n");
1038                 return 0;
1039         }
1040
1041         INIT_LIST_HEAD(&priv->mc_list);
1042         INIT_LIST_HEAD(&priv->curr_list);
1043
1044         /* Calculate Rx buf size */
1045         dev->mtu = min(dev->mtu, priv->max_mtu);
1046         mlx4_en_calc_rx_buf(dev);
1047         en_dbg(DRV, priv, "Rx buf size:%d\n", priv->rx_skb_size);
1048
1049         /* Configure rx cq's and rings */
1050         err = mlx4_en_activate_rx_rings(priv);
1051         if (err) {
1052                 en_err(priv, "Failed to activate RX rings\n");
1053                 return err;
1054         }
1055         for (i = 0; i < priv->rx_ring_num; i++) {
1056                 cq = &priv->rx_cq[i];
1057
1058                 err = mlx4_en_activate_cq(priv, cq, i);
1059                 if (err) {
1060                         en_err(priv, "Failed activating Rx CQ\n");
1061                         goto cq_err;
1062                 }
1063                 for (j = 0; j < cq->size; j++)
1064                         cq->buf[j].owner_sr_opcode = MLX4_CQE_OWNER_MASK;
1065                 err = mlx4_en_set_cq_moder(priv, cq);
1066                 if (err) {
1067                         en_err(priv, "Failed setting cq moderation parameters");
1068                         mlx4_en_deactivate_cq(priv, cq);
1069                         goto cq_err;
1070                 }
1071                 mlx4_en_arm_cq(priv, cq);
1072                 priv->rx_ring[i].cqn = cq->mcq.cqn;
1073                 ++rx_index;
1074         }
1075
1076         /* Set qp number */
1077         en_dbg(DRV, priv, "Getting qp number for port %d\n", priv->port);
1078         err = mlx4_get_eth_qp(mdev->dev, priv->port,
1079                                 priv->mac, &priv->base_qpn);
1080         if (err) {
1081                 en_err(priv, "Failed getting eth qp\n");
1082                 goto cq_err;
1083         }
1084         mdev->mac_removed[priv->port] = 0;
1085
1086         err = mlx4_en_config_rss_steer(priv);
1087         if (err) {
1088                 en_err(priv, "Failed configuring rss steering\n");
1089                 goto mac_err;
1090         }
1091
1092         err = mlx4_en_create_drop_qp(priv);
1093         if (err)
1094                 goto rss_err;
1095
1096         /* Configure tx cq's and rings */
1097         for (i = 0; i < priv->tx_ring_num; i++) {
1098                 /* Configure cq */
1099                 cq = &priv->tx_cq[i];
1100                 err = mlx4_en_activate_cq(priv, cq, i);
1101                 if (err) {
1102                         en_err(priv, "Failed allocating Tx CQ\n");
1103                         goto tx_err;
1104                 }
1105                 err = mlx4_en_set_cq_moder(priv, cq);
1106                 if (err) {
1107                         en_err(priv, "Failed setting cq moderation parameters");
1108                         mlx4_en_deactivate_cq(priv, cq);
1109                         goto tx_err;
1110                 }
1111                 en_dbg(DRV, priv, "Resetting index of collapsed CQ:%d to -1\n", i);
1112                 cq->buf->wqe_index = cpu_to_be16(0xffff);
1113
1114                 /* Configure ring */
1115                 tx_ring = &priv->tx_ring[i];
1116                 err = mlx4_en_activate_tx_ring(priv, tx_ring, cq->mcq.cqn,
1117                         i / priv->mdev->profile.num_tx_rings_p_up);
1118                 if (err) {
1119                         en_err(priv, "Failed allocating Tx ring\n");
1120                         mlx4_en_deactivate_cq(priv, cq);
1121                         goto tx_err;
1122                 }
1123                 tx_ring->tx_queue = netdev_get_tx_queue(dev, i);
1124
1125                 /* Arm CQ for TX completions */
1126                 mlx4_en_arm_cq(priv, cq);
1127
1128                 /* Set initial ownership of all Tx TXBBs to SW (1) */
1129                 for (j = 0; j < tx_ring->buf_size; j += STAMP_STRIDE)
1130                         *((u32 *) (tx_ring->buf + j)) = 0xffffffff;
1131                 ++tx_index;
1132         }
1133
1134         /* Configure port */
1135         err = mlx4_SET_PORT_general(mdev->dev, priv->port,
1136                                     priv->rx_skb_size + ETH_FCS_LEN,
1137                                     priv->prof->tx_pause,
1138                                     priv->prof->tx_ppp,
1139                                     priv->prof->rx_pause,
1140                                     priv->prof->rx_ppp);
1141         if (err) {
1142                 en_err(priv, "Failed setting port general configurations "
1143                              "for port %d, with error %d\n", priv->port, err);
1144                 goto tx_err;
1145         }
1146         /* Set default qp number */
1147         err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port, priv->base_qpn, 0);
1148         if (err) {
1149                 en_err(priv, "Failed setting default qp numbers\n");
1150                 goto tx_err;
1151         }
1152
1153         /* Init port */
1154         en_dbg(HW, priv, "Initializing port\n");
1155         err = mlx4_INIT_PORT(mdev->dev, priv->port);
1156         if (err) {
1157                 en_err(priv, "Failed Initializing port\n");
1158                 goto tx_err;
1159         }
1160
1161         /* Attach rx QP to bradcast address */
1162         memset(&mc_list[10], 0xff, ETH_ALEN);
1163         mc_list[5] = priv->port; /* needed for B0 steering support */
1164         if (mlx4_multicast_attach(mdev->dev, &priv->rss_map.indir_qp, mc_list,
1165                                   priv->port, 0, MLX4_PROT_ETH,
1166                                   &priv->broadcast_id))
1167                 mlx4_warn(mdev, "Failed Attaching Broadcast\n");
1168
1169         /* Must redo promiscuous mode setup. */
1170         priv->flags &= ~(MLX4_EN_FLAG_PROMISC | MLX4_EN_FLAG_MC_PROMISC);
1171         if (mdev->dev->caps.steering_mode ==
1172             MLX4_STEERING_MODE_DEVICE_MANAGED) {
1173                 mlx4_flow_steer_promisc_remove(mdev->dev,
1174                                                priv->port,
1175                                                MLX4_FS_PROMISC_UPLINK);
1176                 mlx4_flow_steer_promisc_remove(mdev->dev,
1177                                                priv->port,
1178                                                MLX4_FS_PROMISC_ALL_MULTI);
1179         }
1180
1181         /* Schedule multicast task to populate multicast list */
1182         queue_work(mdev->workqueue, &priv->mcast_task);
1183
1184         mlx4_set_stats_bitmap(mdev->dev, &priv->stats_bitmap);
1185
1186         priv->port_up = true;
1187         netif_tx_start_all_queues(dev);
1188         return 0;
1189
1190 tx_err:
1191         while (tx_index--) {
1192                 mlx4_en_deactivate_tx_ring(priv, &priv->tx_ring[tx_index]);
1193                 mlx4_en_deactivate_cq(priv, &priv->tx_cq[tx_index]);
1194         }
1195         mlx4_en_destroy_drop_qp(priv);
1196 rss_err:
1197         mlx4_en_release_rss_steer(priv);
1198 mac_err:
1199         mlx4_put_eth_qp(mdev->dev, priv->port, priv->mac, priv->base_qpn);
1200 cq_err:
1201         while (rx_index--)
1202                 mlx4_en_deactivate_cq(priv, &priv->rx_cq[rx_index]);
1203         for (i = 0; i < priv->rx_ring_num; i++)
1204                 mlx4_en_deactivate_rx_ring(priv, &priv->rx_ring[i]);
1205
1206         return err; /* need to close devices */
1207 }
1208
1209
1210 void mlx4_en_stop_port(struct net_device *dev)
1211 {
1212         struct mlx4_en_priv *priv = netdev_priv(dev);
1213         struct mlx4_en_dev *mdev = priv->mdev;
1214         struct mlx4_en_mc_list *mclist, *tmp;
1215         int i;
1216         u8 mc_list[16] = {0};
1217
1218         if (!priv->port_up) {
1219                 en_dbg(DRV, priv, "stop port called while port already down\n");
1220                 return;
1221         }
1222
1223         /* Synchronize with tx routine */
1224         netif_tx_lock_bh(dev);
1225         netif_tx_stop_all_queues(dev);
1226         netif_tx_unlock_bh(dev);
1227
1228         /* Set port as not active */
1229         priv->port_up = false;
1230
1231         /* Detach All multicasts */
1232         memset(&mc_list[10], 0xff, ETH_ALEN);
1233         mc_list[5] = priv->port; /* needed for B0 steering support */
1234         mlx4_multicast_detach(mdev->dev, &priv->rss_map.indir_qp, mc_list,
1235                               MLX4_PROT_ETH, priv->broadcast_id);
1236         list_for_each_entry(mclist, &priv->curr_list, list) {
1237                 memcpy(&mc_list[10], mclist->addr, ETH_ALEN);
1238                 mc_list[5] = priv->port;
1239                 mlx4_multicast_detach(mdev->dev, &priv->rss_map.indir_qp,
1240                                       mc_list, MLX4_PROT_ETH, mclist->reg_id);
1241         }
1242         mlx4_en_clear_list(dev);
1243         list_for_each_entry_safe(mclist, tmp, &priv->curr_list, list) {
1244                 list_del(&mclist->list);
1245                 kfree(mclist);
1246         }
1247
1248         /* Flush multicast filter */
1249         mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0, 1, MLX4_MCAST_CONFIG);
1250
1251         mlx4_en_destroy_drop_qp(priv);
1252
1253         /* Free TX Rings */
1254         for (i = 0; i < priv->tx_ring_num; i++) {
1255                 mlx4_en_deactivate_tx_ring(priv, &priv->tx_ring[i]);
1256                 mlx4_en_deactivate_cq(priv, &priv->tx_cq[i]);
1257         }
1258         msleep(10);
1259
1260         for (i = 0; i < priv->tx_ring_num; i++)
1261                 mlx4_en_free_tx_buf(dev, &priv->tx_ring[i]);
1262
1263         /* Free RSS qps */
1264         mlx4_en_release_rss_steer(priv);
1265
1266         /* Unregister Mac address for the port */
1267         mlx4_put_eth_qp(mdev->dev, priv->port, priv->mac, priv->base_qpn);
1268         mdev->mac_removed[priv->port] = 1;
1269
1270         /* Free RX Rings */
1271         for (i = 0; i < priv->rx_ring_num; i++) {
1272                 mlx4_en_deactivate_rx_ring(priv, &priv->rx_ring[i]);
1273                 while (test_bit(NAPI_STATE_SCHED, &priv->rx_cq[i].napi.state))
1274                         msleep(1);
1275                 mlx4_en_deactivate_cq(priv, &priv->rx_cq[i]);
1276         }
1277
1278         /* close port*/
1279         mlx4_CLOSE_PORT(mdev->dev, priv->port);
1280 }
1281
1282 static void mlx4_en_restart(struct work_struct *work)
1283 {
1284         struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
1285                                                  watchdog_task);
1286         struct mlx4_en_dev *mdev = priv->mdev;
1287         struct net_device *dev = priv->dev;
1288         int i;
1289
1290         en_dbg(DRV, priv, "Watchdog task called for port %d\n", priv->port);
1291
1292         mutex_lock(&mdev->state_lock);
1293         if (priv->port_up) {
1294                 mlx4_en_stop_port(dev);
1295                 for (i = 0; i < priv->tx_ring_num; i++)
1296                         netdev_tx_reset_queue(priv->tx_ring[i].tx_queue);
1297                 if (mlx4_en_start_port(dev))
1298                         en_err(priv, "Failed restarting port %d\n", priv->port);
1299         }
1300         mutex_unlock(&mdev->state_lock);
1301 }
1302
1303 static void mlx4_en_clear_stats(struct net_device *dev)
1304 {
1305         struct mlx4_en_priv *priv = netdev_priv(dev);
1306         struct mlx4_en_dev *mdev = priv->mdev;
1307         int i;
1308
1309         if (mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 1))
1310                 en_dbg(HW, priv, "Failed dumping statistics\n");
1311
1312         memset(&priv->stats, 0, sizeof(priv->stats));
1313         memset(&priv->pstats, 0, sizeof(priv->pstats));
1314         memset(&priv->pkstats, 0, sizeof(priv->pkstats));
1315         memset(&priv->port_stats, 0, sizeof(priv->port_stats));
1316
1317         for (i = 0; i < priv->tx_ring_num; i++) {
1318                 priv->tx_ring[i].bytes = 0;
1319                 priv->tx_ring[i].packets = 0;
1320                 priv->tx_ring[i].tx_csum = 0;
1321         }
1322         for (i = 0; i < priv->rx_ring_num; i++) {
1323                 priv->rx_ring[i].bytes = 0;
1324                 priv->rx_ring[i].packets = 0;
1325                 priv->rx_ring[i].csum_ok = 0;
1326                 priv->rx_ring[i].csum_none = 0;
1327         }
1328 }
1329
1330 static int mlx4_en_open(struct net_device *dev)
1331 {
1332         struct mlx4_en_priv *priv = netdev_priv(dev);
1333         struct mlx4_en_dev *mdev = priv->mdev;
1334         int err = 0;
1335
1336         mutex_lock(&mdev->state_lock);
1337
1338         if (!mdev->device_up) {
1339                 en_err(priv, "Cannot open - device down/disabled\n");
1340                 err = -EBUSY;
1341                 goto out;
1342         }
1343
1344         /* Reset HW statistics and SW counters */
1345         mlx4_en_clear_stats(dev);
1346
1347         err = mlx4_en_start_port(dev);
1348         if (err)
1349                 en_err(priv, "Failed starting port:%d\n", priv->port);
1350
1351 out:
1352         mutex_unlock(&mdev->state_lock);
1353         return err;
1354 }
1355
1356
1357 static int mlx4_en_close(struct net_device *dev)
1358 {
1359         struct mlx4_en_priv *priv = netdev_priv(dev);
1360         struct mlx4_en_dev *mdev = priv->mdev;
1361
1362         en_dbg(IFDOWN, priv, "Close port called\n");
1363
1364         mutex_lock(&mdev->state_lock);
1365
1366         mlx4_en_stop_port(dev);
1367         netif_carrier_off(dev);
1368
1369         mutex_unlock(&mdev->state_lock);
1370         return 0;
1371 }
1372
1373 void mlx4_en_free_resources(struct mlx4_en_priv *priv)
1374 {
1375         int i;
1376
1377 #ifdef CONFIG_RFS_ACCEL
1378         free_irq_cpu_rmap(priv->dev->rx_cpu_rmap);
1379         priv->dev->rx_cpu_rmap = NULL;
1380 #endif
1381
1382         for (i = 0; i < priv->tx_ring_num; i++) {
1383                 if (priv->tx_ring[i].tx_info)
1384                         mlx4_en_destroy_tx_ring(priv, &priv->tx_ring[i]);
1385                 if (priv->tx_cq[i].buf)
1386                         mlx4_en_destroy_cq(priv, &priv->tx_cq[i]);
1387         }
1388
1389         for (i = 0; i < priv->rx_ring_num; i++) {
1390                 if (priv->rx_ring[i].rx_info)
1391                         mlx4_en_destroy_rx_ring(priv, &priv->rx_ring[i],
1392                                 priv->prof->rx_ring_size, priv->stride);
1393                 if (priv->rx_cq[i].buf)
1394                         mlx4_en_destroy_cq(priv, &priv->rx_cq[i]);
1395         }
1396
1397         if (priv->base_tx_qpn) {
1398                 mlx4_qp_release_range(priv->mdev->dev, priv->base_tx_qpn, priv->tx_ring_num);
1399                 priv->base_tx_qpn = 0;
1400         }
1401 }
1402
1403 int mlx4_en_alloc_resources(struct mlx4_en_priv *priv)
1404 {
1405         struct mlx4_en_port_profile *prof = priv->prof;
1406         int i;
1407         int err;
1408
1409         err = mlx4_qp_reserve_range(priv->mdev->dev, priv->tx_ring_num, 256, &priv->base_tx_qpn);
1410         if (err) {
1411                 en_err(priv, "failed reserving range for TX rings\n");
1412                 return err;
1413         }
1414
1415         /* Create tx Rings */
1416         for (i = 0; i < priv->tx_ring_num; i++) {
1417                 if (mlx4_en_create_cq(priv, &priv->tx_cq[i],
1418                                       prof->tx_ring_size, i, TX))
1419                         goto err;
1420
1421                 if (mlx4_en_create_tx_ring(priv, &priv->tx_ring[i], priv->base_tx_qpn + i,
1422                                            prof->tx_ring_size, TXBB_SIZE))
1423                         goto err;
1424         }
1425
1426         /* Create rx Rings */
1427         for (i = 0; i < priv->rx_ring_num; i++) {
1428                 if (mlx4_en_create_cq(priv, &priv->rx_cq[i],
1429                                       prof->rx_ring_size, i, RX))
1430                         goto err;
1431
1432                 if (mlx4_en_create_rx_ring(priv, &priv->rx_ring[i],
1433                                            prof->rx_ring_size, priv->stride))
1434                         goto err;
1435         }
1436
1437 #ifdef CONFIG_RFS_ACCEL
1438         priv->dev->rx_cpu_rmap = alloc_irq_cpu_rmap(priv->rx_ring_num);
1439         if (!priv->dev->rx_cpu_rmap)
1440                 goto err;
1441
1442         INIT_LIST_HEAD(&priv->filters);
1443         spin_lock_init(&priv->filters_lock);
1444 #endif
1445
1446         return 0;
1447
1448 err:
1449         en_err(priv, "Failed to allocate NIC resources\n");
1450         return -ENOMEM;
1451 }
1452
1453
1454 void mlx4_en_destroy_netdev(struct net_device *dev)
1455 {
1456         struct mlx4_en_priv *priv = netdev_priv(dev);
1457         struct mlx4_en_dev *mdev = priv->mdev;
1458
1459         en_dbg(DRV, priv, "Destroying netdev on port:%d\n", priv->port);
1460
1461         /* Unregister device - this will close the port if it was up */
1462         if (priv->registered)
1463                 unregister_netdev(dev);
1464
1465         if (priv->allocated)
1466                 mlx4_free_hwq_res(mdev->dev, &priv->res, MLX4_EN_PAGE_SIZE);
1467
1468         cancel_delayed_work(&priv->stats_task);
1469         /* flush any pending task for this netdev */
1470         flush_workqueue(mdev->workqueue);
1471
1472         /* Detach the netdev so tasks would not attempt to access it */
1473         mutex_lock(&mdev->state_lock);
1474         mdev->pndev[priv->port] = NULL;
1475         mutex_unlock(&mdev->state_lock);
1476
1477         mlx4_en_free_resources(priv);
1478
1479         kfree(priv->tx_ring);
1480         kfree(priv->tx_cq);
1481
1482         free_netdev(dev);
1483 }
1484
1485 static int mlx4_en_change_mtu(struct net_device *dev, int new_mtu)
1486 {
1487         struct mlx4_en_priv *priv = netdev_priv(dev);
1488         struct mlx4_en_dev *mdev = priv->mdev;
1489         int err = 0;
1490
1491         en_dbg(DRV, priv, "Change MTU called - current:%d new:%d\n",
1492                  dev->mtu, new_mtu);
1493
1494         if ((new_mtu < MLX4_EN_MIN_MTU) || (new_mtu > priv->max_mtu)) {
1495                 en_err(priv, "Bad MTU size:%d.\n", new_mtu);
1496                 return -EPERM;
1497         }
1498         dev->mtu = new_mtu;
1499
1500         if (netif_running(dev)) {
1501                 mutex_lock(&mdev->state_lock);
1502                 if (!mdev->device_up) {
1503                         /* NIC is probably restarting - let watchdog task reset
1504                          * the port */
1505                         en_dbg(DRV, priv, "Change MTU called with card down!?\n");
1506                 } else {
1507                         mlx4_en_stop_port(dev);
1508                         err = mlx4_en_start_port(dev);
1509                         if (err) {
1510                                 en_err(priv, "Failed restarting port:%d\n",
1511                                          priv->port);
1512                                 queue_work(mdev->workqueue, &priv->watchdog_task);
1513                         }
1514                 }
1515                 mutex_unlock(&mdev->state_lock);
1516         }
1517         return 0;
1518 }
1519
1520 static int mlx4_en_set_features(struct net_device *netdev,
1521                 netdev_features_t features)
1522 {
1523         struct mlx4_en_priv *priv = netdev_priv(netdev);
1524
1525         if (features & NETIF_F_LOOPBACK)
1526                 priv->ctrl_flags |= cpu_to_be32(MLX4_WQE_CTRL_FORCE_LOOPBACK);
1527         else
1528                 priv->ctrl_flags &=
1529                         cpu_to_be32(~MLX4_WQE_CTRL_FORCE_LOOPBACK);
1530
1531         return 0;
1532
1533 }
1534
1535 static const struct net_device_ops mlx4_netdev_ops = {
1536         .ndo_open               = mlx4_en_open,
1537         .ndo_stop               = mlx4_en_close,
1538         .ndo_start_xmit         = mlx4_en_xmit,
1539         .ndo_select_queue       = mlx4_en_select_queue,
1540         .ndo_get_stats          = mlx4_en_get_stats,
1541         .ndo_set_rx_mode        = mlx4_en_set_multicast,
1542         .ndo_set_mac_address    = mlx4_en_set_mac,
1543         .ndo_validate_addr      = eth_validate_addr,
1544         .ndo_change_mtu         = mlx4_en_change_mtu,
1545         .ndo_tx_timeout         = mlx4_en_tx_timeout,
1546         .ndo_vlan_rx_add_vid    = mlx4_en_vlan_rx_add_vid,
1547         .ndo_vlan_rx_kill_vid   = mlx4_en_vlan_rx_kill_vid,
1548 #ifdef CONFIG_NET_POLL_CONTROLLER
1549         .ndo_poll_controller    = mlx4_en_netpoll,
1550 #endif
1551         .ndo_set_features       = mlx4_en_set_features,
1552         .ndo_setup_tc           = mlx4_en_setup_tc,
1553 #ifdef CONFIG_RFS_ACCEL
1554         .ndo_rx_flow_steer      = mlx4_en_filter_rfs,
1555 #endif
1556 };
1557
1558 int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port,
1559                         struct mlx4_en_port_profile *prof)
1560 {
1561         struct net_device *dev;
1562         struct mlx4_en_priv *priv;
1563         int i;
1564         int err;
1565
1566         dev = alloc_etherdev_mqs(sizeof(struct mlx4_en_priv),
1567             prof->tx_ring_num, prof->rx_ring_num);
1568         if (dev == NULL)
1569                 return -ENOMEM;
1570
1571         SET_NETDEV_DEV(dev, &mdev->dev->pdev->dev);
1572         dev->dev_id =  port - 1;
1573
1574         /*
1575          * Initialize driver private data
1576          */
1577
1578         priv = netdev_priv(dev);
1579         memset(priv, 0, sizeof(struct mlx4_en_priv));
1580         priv->dev = dev;
1581         priv->mdev = mdev;
1582         priv->ddev = &mdev->pdev->dev;
1583         priv->prof = prof;
1584         priv->port = port;
1585         priv->port_up = false;
1586         priv->flags = prof->flags;
1587         priv->ctrl_flags = cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE |
1588                         MLX4_WQE_CTRL_SOLICITED);
1589         priv->tx_ring_num = prof->tx_ring_num;
1590         priv->tx_ring = kzalloc(sizeof(struct mlx4_en_tx_ring) *
1591                         priv->tx_ring_num, GFP_KERNEL);
1592         if (!priv->tx_ring) {
1593                 err = -ENOMEM;
1594                 goto out;
1595         }
1596         priv->tx_cq = kzalloc(sizeof(struct mlx4_en_cq) * priv->tx_ring_num,
1597                         GFP_KERNEL);
1598         if (!priv->tx_cq) {
1599                 err = -ENOMEM;
1600                 goto out;
1601         }
1602         priv->rx_ring_num = prof->rx_ring_num;
1603         priv->mac_index = -1;
1604         priv->msg_enable = MLX4_EN_MSG_LEVEL;
1605         spin_lock_init(&priv->stats_lock);
1606         INIT_WORK(&priv->mcast_task, mlx4_en_do_set_multicast);
1607         INIT_WORK(&priv->mac_task, mlx4_en_do_set_mac);
1608         INIT_WORK(&priv->watchdog_task, mlx4_en_restart);
1609         INIT_WORK(&priv->linkstate_task, mlx4_en_linkstate);
1610         INIT_DELAYED_WORK(&priv->stats_task, mlx4_en_do_get_stats);
1611 #ifdef CONFIG_MLX4_EN_DCB
1612         if (!mlx4_is_slave(priv->mdev->dev))
1613                 dev->dcbnl_ops = &mlx4_en_dcbnl_ops;
1614 #endif
1615
1616         /* Query for default mac and max mtu */
1617         priv->max_mtu = mdev->dev->caps.eth_mtu_cap[priv->port];
1618         priv->mac = mdev->dev->caps.def_mac[priv->port];
1619         if (ILLEGAL_MAC(priv->mac)) {
1620                 en_err(priv, "Port: %d, invalid mac burned: 0x%llx, quiting\n",
1621                          priv->port, priv->mac);
1622                 err = -EINVAL;
1623                 goto out;
1624         }
1625
1626         priv->stride = roundup_pow_of_two(sizeof(struct mlx4_en_rx_desc) +
1627                                           DS_SIZE * MLX4_EN_MAX_RX_FRAGS);
1628         err = mlx4_en_alloc_resources(priv);
1629         if (err)
1630                 goto out;
1631
1632         /* Allocate page for receive rings */
1633         err = mlx4_alloc_hwq_res(mdev->dev, &priv->res,
1634                                 MLX4_EN_PAGE_SIZE, MLX4_EN_PAGE_SIZE);
1635         if (err) {
1636                 en_err(priv, "Failed to allocate page for rx qps\n");
1637                 goto out;
1638         }
1639         priv->allocated = 1;
1640
1641         /*
1642          * Initialize netdev entry points
1643          */
1644         dev->netdev_ops = &mlx4_netdev_ops;
1645         dev->watchdog_timeo = MLX4_EN_WATCHDOG_TIMEOUT;
1646         netif_set_real_num_tx_queues(dev, priv->tx_ring_num);
1647         netif_set_real_num_rx_queues(dev, priv->rx_ring_num);
1648
1649         SET_ETHTOOL_OPS(dev, &mlx4_en_ethtool_ops);
1650
1651         /* Set defualt MAC */
1652         dev->addr_len = ETH_ALEN;
1653         for (i = 0; i < ETH_ALEN; i++) {
1654                 dev->dev_addr[ETH_ALEN - 1 - i] = (u8) (priv->mac >> (8 * i));
1655                 dev->perm_addr[ETH_ALEN - 1 - i] = (u8) (priv->mac >> (8 * i));
1656         }
1657
1658         /*
1659          * Set driver features
1660          */
1661         dev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1662         if (mdev->LSO_support)
1663                 dev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6;
1664
1665         dev->vlan_features = dev->hw_features;
1666
1667         dev->hw_features |= NETIF_F_RXCSUM | NETIF_F_RXHASH;
1668         dev->features = dev->hw_features | NETIF_F_HIGHDMA |
1669                         NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX |
1670                         NETIF_F_HW_VLAN_FILTER;
1671         dev->hw_features |= NETIF_F_LOOPBACK;
1672
1673         if (mdev->dev->caps.steering_mode ==
1674             MLX4_STEERING_MODE_DEVICE_MANAGED)
1675                 dev->hw_features |= NETIF_F_NTUPLE;
1676
1677         mdev->pndev[port] = dev;
1678
1679         netif_carrier_off(dev);
1680         err = register_netdev(dev);
1681         if (err) {
1682                 en_err(priv, "Netdev registration failed for port %d\n", port);
1683                 goto out;
1684         }
1685         priv->registered = 1;
1686
1687         en_warn(priv, "Using %d TX rings\n", prof->tx_ring_num);
1688         en_warn(priv, "Using %d RX rings\n", prof->rx_ring_num);
1689
1690         /* Configure port */
1691         mlx4_en_calc_rx_buf(dev);
1692         err = mlx4_SET_PORT_general(mdev->dev, priv->port,
1693                                     priv->rx_skb_size + ETH_FCS_LEN,
1694                                     prof->tx_pause, prof->tx_ppp,
1695                                     prof->rx_pause, prof->rx_ppp);
1696         if (err) {
1697                 en_err(priv, "Failed setting port general configurations "
1698                        "for port %d, with error %d\n", priv->port, err);
1699                 goto out;
1700         }
1701
1702         /* Init port */
1703         en_warn(priv, "Initializing port\n");
1704         err = mlx4_INIT_PORT(mdev->dev, priv->port);
1705         if (err) {
1706                 en_err(priv, "Failed Initializing port\n");
1707                 goto out;
1708         }
1709         mlx4_en_set_default_moderation(priv);
1710         queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);
1711         return 0;
1712
1713 out:
1714         mlx4_en_destroy_netdev(dev);
1715         return err;
1716 }
1717