Pileus Git - ~andy/linux/blob - 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 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 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         for (i = 0; i < up; i++) {
  63                 netdev_set_tc_queue(dev, i, priv->num_tx_rings_p_up, offset);
  64                 offset += priv->num_tx_rings_p_up;
  65         }
  66
  67         return 0;
  68 }
  69
  70 #ifdef CONFIG_RFS_ACCEL
  71
  72 struct mlx4_en_filter {
  73         struct list_head next;
  74         struct work_struct work;
  75
  76         __be32 src_ip;
  77         __be32 dst_ip;
  78         __be16 src_port;
  79         __be16 dst_port;
  80
  81         int rxq_index;
  82         struct mlx4_en_priv *priv;
  83         u32 flow_id;                    /* RFS infrastructure id */
  84         int id;                         /* mlx4_en driver id */
  85         u64 reg_id;                     /* Flow steering API id */
  86         u8 activated;                   /* Used to prevent expiry before filter
  87                                          * is attached
  88                                          */
  89         struct hlist_node filter_chain;
  90 };
  91
  92 static void mlx4_en_filter_rfs_expire(struct mlx4_en_priv *priv);
  93
  94 static void mlx4_en_filter_work(struct work_struct *work)
  95 {
  96         struct mlx4_en_filter *filter = container_of(work,
  97                                                      struct mlx4_en_filter,
  98                                                      work);
  99         struct mlx4_en_priv *priv = filter->priv;
 100         struct mlx4_spec_list spec_tcp = {
 101                 .id = MLX4_NET_TRANS_RULE_ID_TCP,
 102                 {
 103                         .tcp_udp = {
 104                                 .dst_port = filter->dst_port,
 105                                 .dst_port_msk = (__force __be16)-1,
 106                                 .src_port = filter->src_port,
 107                                 .src_port_msk = (__force __be16)-1,
 108                         },
 109                 },
 110         };
 111         struct mlx4_spec_list spec_ip = {
 112                 .id = MLX4_NET_TRANS_RULE_ID_IPV4,
 113                 {
 114                         .ipv4 = {
 115                                 .dst_ip = filter->dst_ip,
 116                                 .dst_ip_msk = (__force __be32)-1,
 117                                 .src_ip = filter->src_ip,
 118                                 .src_ip_msk = (__force __be32)-1,
 119                         },
 120                 },
 121         };
 122         struct mlx4_spec_list spec_eth = {
 123                 .id = MLX4_NET_TRANS_RULE_ID_ETH,
 124         };
 125         struct mlx4_net_trans_rule rule = {
 126                 .list = LIST_HEAD_INIT(rule.list),
 127                 .queue_mode = MLX4_NET_TRANS_Q_LIFO,
 128                 .exclusive = 1,
 129                 .allow_loopback = 1,
 130                 .promisc_mode = MLX4_FS_PROMISC_NONE,
 131                 .port = priv->port,
 132                 .priority = MLX4_DOMAIN_RFS,
 133         };
 134         int rc;
 135         __be64 mac_mask = cpu_to_be64(MLX4_MAC_MASK << 16);
 136
 137         list_add_tail(&spec_eth.list, &rule.list);
 138         list_add_tail(&spec_ip.list, &rule.list);
 139         list_add_tail(&spec_tcp.list, &rule.list);
 140
 141         rule.qpn = priv->rss_map.qps[filter->rxq_index].qpn;
 142         memcpy(spec_eth.eth.dst_mac, priv->dev->dev_addr, ETH_ALEN);
 143         memcpy(spec_eth.eth.dst_mac_msk, &mac_mask, ETH_ALEN);
 144
 145         filter->activated = 0;
 146
 147         if (filter->reg_id) {
 148                 rc = mlx4_flow_detach(priv->mdev->dev, filter->reg_id);
 149                 if (rc && rc != -ENOENT)
 150                         en_err(priv, "Error detaching flow. rc = %d\n", rc);
 151         }
 152
 153         rc = mlx4_flow_attach(priv->mdev->dev, &rule, &filter->reg_id);
 154         if (rc)
 155                 en_err(priv, "Error attaching flow. err = %d\n", rc);
 156
 157         mlx4_en_filter_rfs_expire(priv);
 158
 159         filter->activated = 1;
 160 }
 161
 162 static inline struct hlist_head *
 163 filter_hash_bucket(struct mlx4_en_priv *priv, __be32 src_ip, __be32 dst_ip,
 164                    __be16 src_port, __be16 dst_port)
 165 {
 166         unsigned long l;
 167         int bucket_idx;
 168
 169         l = (__force unsigned long)src_port |
 170             ((__force unsigned long)dst_port << 2);
 171         l ^= (__force unsigned long)(src_ip ^ dst_ip);
 172
 173         bucket_idx = hash_long(l, MLX4_EN_FILTER_HASH_SHIFT);
 174
 175         return &priv->filter_hash[bucket_idx];
 176 }
 177
 178 static struct mlx4_en_filter *
 179 mlx4_en_filter_alloc(struct mlx4_en_priv *priv, int rxq_index, __be32 src_ip,
 180                      __be32 dst_ip, __be16 src_port, __be16 dst_port,
 181                      u32 flow_id)
 182 {
 183         struct mlx4_en_filter *filter = NULL;
 184
 185         filter = kzalloc(sizeof(struct mlx4_en_filter), GFP_ATOMIC);
 186         if (!filter)
 187                 return NULL;
 188
 189         filter->priv = priv;
 190         filter->rxq_index = rxq_index;
 191         INIT_WORK(&filter->work, mlx4_en_filter_work);
 192
 193         filter->src_ip = src_ip;
 194         filter->dst_ip = dst_ip;
 195         filter->src_port = src_port;
 196         filter->dst_port = dst_port;
 197
 198         filter->flow_id = flow_id;
 199
 200         filter->id = priv->last_filter_id++ % RPS_NO_FILTER;
 201
 202         list_add_tail(&filter->next, &priv->filters);
 203         hlist_add_head(&filter->filter_chain,
 204                        filter_hash_bucket(priv, src_ip, dst_ip, src_port,
 205                                           dst_port));
 206
 207         return filter;
 208 }
 209
 210 static void mlx4_en_filter_free(struct mlx4_en_filter *filter)
 211 {
 212         struct mlx4_en_priv *priv = filter->priv;
 213         int rc;
 214
 215         list_del(&filter->next);
 216
 217         rc = mlx4_flow_detach(priv->mdev->dev, filter->reg_id);
 218         if (rc && rc != -ENOENT)
 219                 en_err(priv, "Error detaching flow. rc = %d\n", rc);
 220
 221         kfree(filter);
 222 }
 223
 224 static inline struct mlx4_en_filter *
 225 mlx4_en_filter_find(struct mlx4_en_priv *priv, __be32 src_ip, __be32 dst_ip,
 226                     __be16 src_port, __be16 dst_port)
 227 {
 228         struct hlist_node *elem;
 229         struct mlx4_en_filter *filter;
 230         struct mlx4_en_filter *ret = NULL;
 231
 232         hlist_for_each_entry(filter, elem,
 233                              filter_hash_bucket(priv, src_ip, dst_ip,
 234                                                 src_port, dst_port),
 235                              filter_chain) {
 236                 if (filter->src_ip == src_ip &&
 237                     filter->dst_ip == dst_ip &&
 238                     filter->src_port == src_port &&
 239                     filter->dst_port == dst_port) {
 240                         ret = filter;
 241                         break;
 242                 }
 243         }
 244
 245         return ret;
 246 }
 247
 248 static int
 249 mlx4_en_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb,
 250                    u16 rxq_index, u32 flow_id)
 251 {
 252         struct mlx4_en_priv *priv = netdev_priv(net_dev);
 253         struct mlx4_en_filter *filter;
 254         const struct iphdr *ip;
 255         const __be16 *ports;
 256         __be32 src_ip;
 257         __be32 dst_ip;
 258         __be16 src_port;
 259         __be16 dst_port;
 260         int nhoff = skb_network_offset(skb);
 261         int ret = 0;
 262
 263         if (skb->protocol != htons(ETH_P_IP))
 264                 return -EPROTONOSUPPORT;
 265
 266         ip = (const struct iphdr *)(skb->data + nhoff);
 267         if (ip_is_fragment(ip))
 268                 return -EPROTONOSUPPORT;
 269
 270         ports = (const __be16 *)(skb->data + nhoff + 4 * ip->ihl);
 271
 272         src_ip = ip->saddr;
 273         dst_ip = ip->daddr;
 274         src_port = ports[0];
 275         dst_port = ports[1];
 276
 277         if (ip->protocol != IPPROTO_TCP)
 278                 return -EPROTONOSUPPORT;
 279
 280         spin_lock_bh(&priv->filters_lock);
 281         filter = mlx4_en_filter_find(priv, src_ip, dst_ip, src_port, dst_port);
 282         if (filter) {
 283                 if (filter->rxq_index == rxq_index)
 284                         goto out;
 285
 286                 filter->rxq_index = rxq_index;
 287         } else {
 288                 filter = mlx4_en_filter_alloc(priv, rxq_index,
 289                                               src_ip, dst_ip,
 290                                               src_port, dst_port, flow_id);
 291                 if (!filter) {
 292                         ret = -ENOMEM;
 293                         goto err;
 294                 }
 295         }
 296
 297         queue_work(priv->mdev->workqueue, &filter->work);
 298
 299 out:
 300         ret = filter->id;
 301 err:
 302         spin_unlock_bh(&priv->filters_lock);
 303
 304         return ret;
 305 }
 306
 307 void mlx4_en_cleanup_filters(struct mlx4_en_priv *priv,
 308                              struct mlx4_en_rx_ring *rx_ring)
 309 {
 310         struct mlx4_en_filter *filter, *tmp;
 311         LIST_HEAD(del_list);
 312
 313         spin_lock_bh(&priv->filters_lock);
 314         list_for_each_entry_safe(filter, tmp, &priv->filters, next) {
 315                 list_move(&filter->next, &del_list);
 316                 hlist_del(&filter->filter_chain);
 317         }
 318         spin_unlock_bh(&priv->filters_lock);
 319
 320         list_for_each_entry_safe(filter, tmp, &del_list, next) {
 321                 cancel_work_sync(&filter->work);
 322                 mlx4_en_filter_free(filter);
 323         }
 324 }
 325
 326 static void mlx4_en_filter_rfs_expire(struct mlx4_en_priv *priv)
 327 {
 328         struct mlx4_en_filter *filter = NULL, *tmp, *last_filter = NULL;
 329         LIST_HEAD(del_list);
 330         int i = 0;
 331
 332         spin_lock_bh(&priv->filters_lock);
 333         list_for_each_entry_safe(filter, tmp, &priv->filters, next) {
 334                 if (i > MLX4_EN_FILTER_EXPIRY_QUOTA)
 335                         break;
 336
 337                 if (filter->activated &&
 338                     !work_pending(&filter->work) &&
 339                     rps_may_expire_flow(priv->dev,
 340                                         filter->rxq_index, filter->flow_id,
 341                                         filter->id)) {
 342                         list_move(&filter->next, &del_list);
 343                         hlist_del(&filter->filter_chain);
 344                 } else
 345                         last_filter = filter;
 346
 347                 i++;
 348         }
 349
 350         if (last_filter && (&last_filter->next != priv->filters.next))
 351                 list_move(&priv->filters, &last_filter->next);
 352
 353         spin_unlock_bh(&priv->filters_lock);
 354
 355         list_for_each_entry_safe(filter, tmp, &del_list, next)
 356                 mlx4_en_filter_free(filter);
 357 }
 358 #endif
 359
 360 static int mlx4_en_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
 361 {
 362         struct mlx4_en_priv *priv = netdev_priv(dev);
 363         struct mlx4_en_dev *mdev = priv->mdev;
 364         int err;
 365         int idx;
 366
 367         en_dbg(HW, priv, "adding VLAN:%d\n", vid);
 368
 369         set_bit(vid, priv->active_vlans);
 370
 371         /* Add VID to port VLAN filter */
 372         mutex_lock(&mdev->state_lock);
 373         if (mdev->device_up && priv->port_up) {
 374                 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv);
 375                 if (err)
 376                         en_err(priv, "Failed configuring VLAN filter\n");
 377         }
 378         if (mlx4_register_vlan(mdev->dev, priv->port, vid, &idx))
 379                 en_err(priv, "failed adding vlan %d\n", vid);
 380         mutex_unlock(&mdev->state_lock);
 381
 382         return 0;
 383 }
 384
 385 static int mlx4_en_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
 386 {
 387         struct mlx4_en_priv *priv = netdev_priv(dev);
 388         struct mlx4_en_dev *mdev = priv->mdev;
 389         int err;
 390         int idx;
 391
 392         en_dbg(HW, priv, "Killing VID:%d\n", vid);
 393
 394         clear_bit(vid, priv->active_vlans);
 395
 396         /* Remove VID from port VLAN filter */
 397         mutex_lock(&mdev->state_lock);
 398         if (!mlx4_find_cached_vlan(mdev->dev, priv->port, vid, &idx))
 399                 mlx4_unregister_vlan(mdev->dev, priv->port, idx);
 400         else
 401                 en_err(priv, "could not find vid %d in cache\n", vid);
 402
 403         if (mdev->device_up && priv->port_up) {
 404                 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv);
 405                 if (err)
 406                         en_err(priv, "Failed configuring VLAN filter\n");
 407         }
 408         mutex_unlock(&mdev->state_lock);
 409
 410         return 0;
 411 }
 412
 413 static void mlx4_en_u64_to_mac(unsigned char dst_mac[ETH_ALEN + 2], u64 src_mac)
 414 {
 415         unsigned int i;
 416         for (i = ETH_ALEN - 1; i; --i) {
 417                 dst_mac[i] = src_mac & 0xff;
 418                 src_mac >>= 8;
 419         }
 420         memset(&dst_mac[ETH_ALEN], 0, 2);
 421 }
 422
 423 static int mlx4_en_uc_steer_add(struct mlx4_en_priv *priv,
 424                                 unsigned char *mac, int *qpn, u64 *reg_id)
 425 {
 426         struct mlx4_en_dev *mdev = priv->mdev;
 427         struct mlx4_dev *dev = mdev->dev;
 428         int err;
 429
 430         switch (dev->caps.steering_mode) {
 431         case MLX4_STEERING_MODE_B0: {
 432                 struct mlx4_qp qp;
 433                 u8 gid[16] = {0};
 434
 435                 qp.qpn = *qpn;
 436                 memcpy(&gid[10], mac, ETH_ALEN);
 437                 gid[5] = priv->port;
 438
 439                 err = mlx4_unicast_attach(dev, &qp, gid, 0, MLX4_PROT_ETH);
 440                 break;
 441         }
 442         case MLX4_STEERING_MODE_DEVICE_MANAGED: {
 443                 struct mlx4_spec_list spec_eth = { {NULL} };
 444                 __be64 mac_mask = cpu_to_be64(MLX4_MAC_MASK << 16);
 445
 446                 struct mlx4_net_trans_rule rule = {
 447                         .queue_mode = MLX4_NET_TRANS_Q_FIFO,
 448                         .exclusive = 0,
 449                         .allow_loopback = 1,
 450                         .promisc_mode = MLX4_FS_PROMISC_NONE,
 451                         .priority = MLX4_DOMAIN_NIC,
 452                 };
 453
 454                 rule.port = priv->port;
 455                 rule.qpn = *qpn;
 456                 INIT_LIST_HEAD(&rule.list);
 457
 458                 spec_eth.id = MLX4_NET_TRANS_RULE_ID_ETH;
 459                 memcpy(spec_eth.eth.dst_mac, mac, ETH_ALEN);
 460                 memcpy(spec_eth.eth.dst_mac_msk, &mac_mask, ETH_ALEN);
 461                 list_add_tail(&spec_eth.list, &rule.list);
 462
 463                 err = mlx4_flow_attach(dev, &rule, reg_id);
 464                 break;
 465         }
 466         default:
 467                 return -EINVAL;
 468         }
 469         if (err)
 470                 en_warn(priv, "Failed Attaching Unicast\n");
 471
 472         return err;
 473 }
 474
 475 static void mlx4_en_uc_steer_release(struct mlx4_en_priv *priv,
 476                                      unsigned char *mac, int qpn, u64 reg_id)
 477 {
 478         struct mlx4_en_dev *mdev = priv->mdev;
 479         struct mlx4_dev *dev = mdev->dev;
 480
 481         switch (dev->caps.steering_mode) {
 482         case MLX4_STEERING_MODE_B0: {
 483                 struct mlx4_qp qp;
 484                 u8 gid[16] = {0};
 485
 486                 qp.qpn = qpn;
 487                 memcpy(&gid[10], mac, ETH_ALEN);
 488                 gid[5] = priv->port;
 489
 490                 mlx4_unicast_detach(dev, &qp, gid, MLX4_PROT_ETH);
 491                 break;
 492         }
 493         case MLX4_STEERING_MODE_DEVICE_MANAGED: {
 494                 mlx4_flow_detach(dev, reg_id);
 495                 break;
 496         }
 497         default:
 498                 en_err(priv, "Invalid steering mode.\n");
 499         }
 500 }
 501
 502 static int mlx4_en_get_qp(struct mlx4_en_priv *priv)
 503 {
 504         struct mlx4_en_dev *mdev = priv->mdev;
 505         struct mlx4_dev *dev = mdev->dev;
 506         struct mlx4_mac_entry *entry;
 507         int index = 0;
 508         int err = 0;
 509         u64 reg_id;
 510         int *qpn = &priv->base_qpn;
 511         u64 mac = mlx4_en_mac_to_u64(priv->dev->dev_addr);
 512
 513         en_dbg(DRV, priv, "Registering MAC: %pM for adding\n",
 514                priv->dev->dev_addr);
 515         index = mlx4_register_mac(dev, priv->port, mac);
 516         if (index < 0) {
 517                 err = index;
 518                 en_err(priv, "Failed adding MAC: %pM\n",
 519                        priv->dev->dev_addr);
 520                 return err;
 521         }
 522
 523         if (dev->caps.steering_mode == MLX4_STEERING_MODE_A0) {
 524                 int base_qpn = mlx4_get_base_qpn(dev, priv->port);
 525                 *qpn = base_qpn + index;
 526                 return 0;
 527         }
 528
 529         err = mlx4_qp_reserve_range(dev, 1, 1, qpn);
 530         en_dbg(DRV, priv, "Reserved qp %d\n", *qpn);
 531         if (err) {
 532                 en_err(priv, "Failed to reserve qp for mac registration\n");
 533                 goto qp_err;
 534         }
 535
 536         err = mlx4_en_uc_steer_add(priv, priv->dev->dev_addr, qpn, &reg_id);
 537         if (err)
 538                 goto steer_err;
 539
 540         entry = kmalloc(sizeof(*entry), GFP_KERNEL);
 541         if (!entry) {
 542                 err = -ENOMEM;
 543                 goto alloc_err;
 544         }
 545         memcpy(entry->mac, priv->dev->dev_addr, sizeof(entry->mac));
 546         entry->reg_id = reg_id;
 547
 548         hlist_add_head_rcu(&entry->hlist,
 549                            &priv->mac_hash[entry->mac[MLX4_EN_MAC_HASH_IDX]]);
 550
 551         return 0;
 552
 553 alloc_err:
 554         mlx4_en_uc_steer_release(priv, priv->dev->dev_addr, *qpn, reg_id);
 555
 556 steer_err:
 557         mlx4_qp_release_range(dev, *qpn, 1);
 558
 559 qp_err:
 560         mlx4_unregister_mac(dev, priv->port, mac);
 561         return err;
 562 }
 563
 564 static void mlx4_en_put_qp(struct mlx4_en_priv *priv)
 565 {
 566         struct mlx4_en_dev *mdev = priv->mdev;
 567         struct mlx4_dev *dev = mdev->dev;
 568         int qpn = priv->base_qpn;
 569         u64 mac = mlx4_en_mac_to_u64(priv->dev->dev_addr);
 570
 571         en_dbg(DRV, priv, "Registering MAC: %pM for deleting\n",
 572                priv->dev->dev_addr);
 573         mlx4_unregister_mac(dev, priv->port, mac);
 574
 575         if (dev->caps.steering_mode != MLX4_STEERING_MODE_A0) {
 576                 struct mlx4_mac_entry *entry;
 577                 struct hlist_node *n, *tmp;
 578                 struct hlist_head *bucket;
 579                 unsigned int mac_hash;
 580
 581                 mac_hash = priv->dev->dev_addr[MLX4_EN_MAC_HASH_IDX];
 582                 bucket = &priv->mac_hash[mac_hash];
 583                 hlist_for_each_entry_safe(entry, n, tmp, bucket, hlist) {
 584                         if (ether_addr_equal_64bits(entry->mac,
 585                                                     priv->dev->dev_addr)) {
 586                                 en_dbg(DRV, priv, "Releasing qp: port %d, MAC %pM, qpn %d\n",
 587                                        priv->port, priv->dev->dev_addr, qpn);
 588                                 mlx4_en_uc_steer_release(priv, entry->mac,
 589                                                          qpn, entry->reg_id);
 590                                 mlx4_qp_release_range(dev, qpn, 1);
 591
 592                                 hlist_del_rcu(&entry->hlist);
 593                                 kfree_rcu(entry, rcu);
 594                                 break;
 595                         }
 596                 }
 597         }
 598 }
 599
 600 static int mlx4_en_replace_mac(struct mlx4_en_priv *priv, int qpn,
 601                                unsigned char *new_mac, unsigned char *prev_mac)
 602 {
 603         struct mlx4_en_dev *mdev = priv->mdev;
 604         struct mlx4_dev *dev = mdev->dev;
 605         int err = 0;
 606         u64 new_mac_u64 = mlx4_en_mac_to_u64(new_mac);
 607
 608         if (dev->caps.steering_mode != MLX4_STEERING_MODE_A0) {
 609                 struct hlist_head *bucket;
 610                 unsigned int mac_hash;
 611                 struct mlx4_mac_entry *entry;
 612                 struct hlist_node *n, *tmp;
 613                 u64 prev_mac_u64 = mlx4_en_mac_to_u64(prev_mac);
 614
 615                 bucket = &priv->mac_hash[prev_mac[MLX4_EN_MAC_HASH_IDX]];
 616                 hlist_for_each_entry_safe(entry, n, tmp, bucket, hlist) {
 617                         if (ether_addr_equal_64bits(entry->mac, prev_mac)) {
 618                                 mlx4_en_uc_steer_release(priv, entry->mac,
 619                                                          qpn, entry->reg_id);
 620                                 mlx4_unregister_mac(dev, priv->port,
 621                                                     prev_mac_u64);
 622                                 hlist_del_rcu(&entry->hlist);
 623                                 synchronize_rcu();
 624                                 memcpy(entry->mac, new_mac, ETH_ALEN);
 625                                 entry->reg_id = 0;
 626                                 mac_hash = new_mac[MLX4_EN_MAC_HASH_IDX];
 627                                 hlist_add_head_rcu(&entry->hlist,
 628                                                    &priv->mac_hash[mac_hash]);
 629                                 mlx4_register_mac(dev, priv->port, new_mac_u64);
 630                                 err = mlx4_en_uc_steer_add(priv, new_mac,
 631                                                            &qpn,
 632                                                            &entry->reg_id);
 633                                 return err;
 634                         }
 635                 }
 636                 return -EINVAL;
 637         }
 638
 639         return __mlx4_replace_mac(dev, priv->port, qpn, new_mac_u64);
 640 }
 641
 642 u64 mlx4_en_mac_to_u64(u8 *addr)
 643 {
 644         u64 mac = 0;
 645         int i;
 646
 647         for (i = 0; i < ETH_ALEN; i++) {
 648                 mac <<= 8;
 649                 mac |= addr[i];
 650         }
 651         return mac;
 652 }
 653
 654 static int mlx4_en_set_mac(struct net_device *dev, void *addr)
 655 {
 656         struct mlx4_en_priv *priv = netdev_priv(dev);
 657         struct mlx4_en_dev *mdev = priv->mdev;
 658         struct sockaddr *saddr = addr;
 659
 660         if (!is_valid_ether_addr(saddr->sa_data))
 661                 return -EADDRNOTAVAIL;
 662
 663         memcpy(dev->dev_addr, saddr->sa_data, ETH_ALEN);
 664         queue_work(mdev->workqueue, &priv->mac_task);
 665         return 0;
 666 }
 667
 668 static void mlx4_en_do_set_mac(struct work_struct *work)
 669 {
 670         struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
 671                                                  mac_task);
 672         struct mlx4_en_dev *mdev = priv->mdev;
 673         int err = 0;
 674
 675         mutex_lock(&mdev->state_lock);
 676         if (priv->port_up) {
 677                 /* Remove old MAC and insert the new one */
 678                 err = mlx4_en_replace_mac(priv, priv->base_qpn,
 679                                           priv->dev->dev_addr, priv->prev_mac);
 680                 if (err)
 681                         en_err(priv, "Failed changing HW MAC address\n");
 682                 memcpy(priv->prev_mac, priv->dev->dev_addr,
 683                        sizeof(priv->prev_mac));
 684         } else
 685                 en_dbg(HW, priv, "Port is down while registering mac, exiting...\n");
 686
 687         mutex_unlock(&mdev->state_lock);
 688 }
 689
 690 static void mlx4_en_clear_list(struct net_device *dev)
 691 {
 692         struct mlx4_en_priv *priv = netdev_priv(dev);
 693         struct mlx4_en_mc_list *tmp, *mc_to_del;
 694
 695         list_for_each_entry_safe(mc_to_del, tmp, &priv->mc_list, list) {
 696                 list_del(&mc_to_del->list);
 697                 kfree(mc_to_del);
 698         }
 699 }
 700
 701 static void mlx4_en_cache_mclist(struct net_device *dev)
 702 {
 703         struct mlx4_en_priv *priv = netdev_priv(dev);
 704         struct netdev_hw_addr *ha;
 705         struct mlx4_en_mc_list *tmp;
 706
 707         mlx4_en_clear_list(dev);
 708         netdev_for_each_mc_addr(ha, dev) {
 709                 tmp = kzalloc(sizeof(struct mlx4_en_mc_list), GFP_ATOMIC);
 710                 if (!tmp) {
 711                         en_err(priv, "failed to allocate multicast list\n");
 712                         mlx4_en_clear_list(dev);
 713                         return;
 714                 }
 715                 memcpy(tmp->addr, ha->addr, ETH_ALEN);
 716                 list_add_tail(&tmp->list, &priv->mc_list);
 717         }
 718 }
 719
 720 static void update_mclist_flags(struct mlx4_en_priv *priv,
 721                                 struct list_head *dst,
 722                                 struct list_head *src)
 723 {
 724         struct mlx4_en_mc_list *dst_tmp, *src_tmp, *new_mc;
 725         bool found;
 726
 727         /* Find all the entries that should be removed from dst,
 728          * These are the entries that are not found in src
 729          */
 730         list_for_each_entry(dst_tmp, dst, list) {
 731                 found = false;
 732                 list_for_each_entry(src_tmp, src, list) {
 733                         if (!memcmp(dst_tmp->addr, src_tmp->addr, ETH_ALEN)) {
 734                                 found = true;
 735                                 break;
 736                         }
 737                 }
 738                 if (!found)
 739                         dst_tmp->action = MCLIST_REM;
 740         }
 741
 742         /* Add entries that exist in src but not in dst
 743          * mark them as need to add
 744          */
 745         list_for_each_entry(src_tmp, src, list) {
 746                 found = false;
 747                 list_for_each_entry(dst_tmp, dst, list) {
 748                         if (!memcmp(dst_tmp->addr, src_tmp->addr, ETH_ALEN)) {
 749                                 dst_tmp->action = MCLIST_NONE;
 750                                 found = true;
 751                                 break;
 752                         }
 753                 }
 754                 if (!found) {
 755                         new_mc = kmalloc(sizeof(struct mlx4_en_mc_list),
 756                                          GFP_KERNEL);
 757                         if (!new_mc) {
 758                                 en_err(priv, "Failed to allocate current multicast list\n");
 759                                 return;
 760                         }
 761                         memcpy(new_mc, src_tmp,
 762                                sizeof(struct mlx4_en_mc_list));
 763                         new_mc->action = MCLIST_ADD;
 764                         list_add_tail(&new_mc->list, dst);
 765                 }
 766         }
 767 }
 768
 769 static void mlx4_en_set_rx_mode(struct net_device *dev)
 770 {
 771         struct mlx4_en_priv *priv = netdev_priv(dev);
 772
 773         if (!priv->port_up)
 774                 return;
 775
 776         queue_work(priv->mdev->workqueue, &priv->rx_mode_task);
 777 }
 778
 779 static void mlx4_en_set_promisc_mode(struct mlx4_en_priv *priv,
 780                                      struct mlx4_en_dev *mdev)
 781 {
 782         int err = 0;
 783
 784         if (!(priv->flags & MLX4_EN_FLAG_PROMISC)) {
 785                 if (netif_msg_rx_status(priv))
 786                         en_warn(priv, "Entering promiscuous mode\n");
 787                 priv->flags |= MLX4_EN_FLAG_PROMISC;
 788
 789                 /* Enable promiscouos mode */
 790                 switch (mdev->dev->caps.steering_mode) {
 791                 case MLX4_STEERING_MODE_DEVICE_MANAGED:
 792                         err = mlx4_flow_steer_promisc_add(mdev->dev,
 793                                                           priv->port,
 794                                                           priv->base_qpn,
 795                                                           MLX4_FS_PROMISC_UPLINK);
 796                         if (err)
 797                                 en_err(priv, "Failed enabling promiscuous mode\n");
 798                         priv->flags |= MLX4_EN_FLAG_MC_PROMISC;
 799                         break;
 800
 801                 case MLX4_STEERING_MODE_B0:
 802                         err = mlx4_unicast_promisc_add(mdev->dev,
 803                                                        priv->base_qpn,
 804                                                        priv->port);
 805                         if (err)
 806                                 en_err(priv, "Failed enabling unicast promiscuous mode\n");
 807
 808                         /* Add the default qp number as multicast
 809                          * promisc
 810                          */
 811                         if (!(priv->flags & MLX4_EN_FLAG_MC_PROMISC)) {
 812                                 err = mlx4_multicast_promisc_add(mdev->dev,
 813                                                                  priv->base_qpn,
 814                                                                  priv->port);
 815                                 if (err)
 816                                         en_err(priv, "Failed enabling multicast promiscuous mode\n");
 817                                 priv->flags |= MLX4_EN_FLAG_MC_PROMISC;
 818                         }
 819                         break;
 820
 821                 case MLX4_STEERING_MODE_A0:
 822                         err = mlx4_SET_PORT_qpn_calc(mdev->dev,
 823                                                      priv->port,
 824                                                      priv->base_qpn,
 825                                                      1);
 826                         if (err)
 827                                 en_err(priv, "Failed enabling promiscuous mode\n");
 828                         break;
 829                 }
 830
 831                 /* Disable port multicast filter (unconditionally) */
 832                 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
 833                                           0, MLX4_MCAST_DISABLE);
 834                 if (err)
 835                         en_err(priv, "Failed disabling multicast filter\n");
 836
 837                 /* Disable port VLAN filter */
 838                 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv);
 839                 if (err)
 840                         en_err(priv, "Failed disabling VLAN filter\n");
 841         }
 842 }
 843
 844 static void mlx4_en_clear_promisc_mode(struct mlx4_en_priv *priv,
 845                                        struct mlx4_en_dev *mdev)
 846 {
 847         int err = 0;
 848
 849         if (netif_msg_rx_status(priv))
 850                 en_warn(priv, "Leaving promiscuous mode\n");
 851         priv->flags &= ~MLX4_EN_FLAG_PROMISC;
 852
 853         /* Disable promiscouos mode */
 854         switch (mdev->dev->caps.steering_mode) {
 855         case MLX4_STEERING_MODE_DEVICE_MANAGED:
 856                 err = mlx4_flow_steer_promisc_remove(mdev->dev,
 857                                                      priv->port,
 858                                                      MLX4_FS_PROMISC_UPLINK);
 859                 if (err)
 860                         en_err(priv, "Failed disabling promiscuous mode\n");
 861                 priv->flags &= ~MLX4_EN_FLAG_MC_PROMISC;
 862                 break;
 863
 864         case MLX4_STEERING_MODE_B0:
 865                 err = mlx4_unicast_promisc_remove(mdev->dev,
 866                                                   priv->base_qpn,
 867                                                   priv->port);
 868                 if (err)
 869                         en_err(priv, "Failed disabling unicast promiscuous mode\n");
 870                 /* Disable Multicast promisc */
 871                 if (priv->flags & MLX4_EN_FLAG_MC_PROMISC) {
 872                         err = mlx4_multicast_promisc_remove(mdev->dev,
 873                                                             priv->base_qpn,
 874                                                             priv->port);
 875                         if (err)
 876                                 en_err(priv, "Failed disabling multicast promiscuous mode\n");
 877                         priv->flags &= ~MLX4_EN_FLAG_MC_PROMISC;
 878                 }
 879                 break;
 880
 881         case MLX4_STEERING_MODE_A0:
 882                 err = mlx4_SET_PORT_qpn_calc(mdev->dev,
 883                                              priv->port,
 884                                              priv->base_qpn, 0);
 885                 if (err)
 886                         en_err(priv, "Failed disabling promiscuous mode\n");
 887                 break;
 888         }
 889
 890         /* Enable port VLAN filter */
 891         err = mlx4_SET_VLAN_FLTR(mdev->dev, priv);
 892         if (err)
 893                 en_err(priv, "Failed enabling VLAN filter\n");
 894 }
 895
 896 static void mlx4_en_do_multicast(struct mlx4_en_priv *priv,
 897                                  struct net_device *dev,
 898                                  struct mlx4_en_dev *mdev)
 899 {
 900         struct mlx4_en_mc_list *mclist, *tmp;
 901         u64 mcast_addr = 0;
 902         u8 mc_list[16] = {0};
 903         int err = 0;
 904
 905         /* Enable/disable the multicast filter according to IFF_ALLMULTI */
 906         if (dev->flags & IFF_ALLMULTI) {
 907                 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
 908                                           0, MLX4_MCAST_DISABLE);
 909                 if (err)
 910                         en_err(priv, "Failed disabling multicast filter\n");
 911
 912                 /* Add the default qp number as multicast promisc */
 913                 if (!(priv->flags & MLX4_EN_FLAG_MC_PROMISC)) {
 914                         switch (mdev->dev->caps.steering_mode) {
 915                         case MLX4_STEERING_MODE_DEVICE_MANAGED:
 916                                 err = mlx4_flow_steer_promisc_add(mdev->dev,
 917                                                                   priv->port,
 918                                                                   priv->base_qpn,
 919                                                                   MLX4_FS_PROMISC_ALL_MULTI);
 920                                 break;
 921
 922                         case MLX4_STEERING_MODE_B0:
 923                                 err = mlx4_multicast_promisc_add(mdev->dev,
 924                                                                  priv->base_qpn,
 925                                                                  priv->port);
 926                                 break;
 927
 928                         case MLX4_STEERING_MODE_A0:
 929                                 break;
 930                         }
 931                         if (err)
 932                                 en_err(priv, "Failed entering multicast promisc mode\n");
 933                         priv->flags |= MLX4_EN_FLAG_MC_PROMISC;
 934                 }
 935         } else {
 936                 /* Disable Multicast promisc */
 937                 if (priv->flags & MLX4_EN_FLAG_MC_PROMISC) {
 938                         switch (mdev->dev->caps.steering_mode) {
 939                         case MLX4_STEERING_MODE_DEVICE_MANAGED:
 940                                 err = mlx4_flow_steer_promisc_remove(mdev->dev,
 941                                                                      priv->port,
 942                                                                      MLX4_FS_PROMISC_ALL_MULTI);
 943                                 break;
 944
 945                         case MLX4_STEERING_MODE_B0:
 946                                 err = mlx4_multicast_promisc_remove(mdev->dev,
 947                                                                     priv->base_qpn,
 948                                                                     priv->port);
 949                                 break;
 950
 951                         case MLX4_STEERING_MODE_A0:
 952                                 break;
 953                         }
 954                         if (err)
 955                                 en_err(priv, "Failed disabling multicast promiscuous mode\n");
 956                         priv->flags &= ~MLX4_EN_FLAG_MC_PROMISC;
 957                 }
 958
 959                 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
 960                                           0, MLX4_MCAST_DISABLE);
 961                 if (err)
 962                         en_err(priv, "Failed disabling multicast filter\n");
 963
 964                 /* Flush mcast filter and init it with broadcast address */
 965                 mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, ETH_BCAST,
 966                                     1, MLX4_MCAST_CONFIG);
 967
 968                 /* Update multicast list - we cache all addresses so they won't
 969                  * change while HW is updated holding the command semaphor */
 970                 netif_addr_lock_bh(dev);
 971                 mlx4_en_cache_mclist(dev);
 972                 netif_addr_unlock_bh(dev);
 973                 list_for_each_entry(mclist, &priv->mc_list, list) {
 974                         mcast_addr = mlx4_en_mac_to_u64(mclist->addr);
 975                         mlx4_SET_MCAST_FLTR(mdev->dev, priv->port,
 976                                             mcast_addr, 0, MLX4_MCAST_CONFIG);
 977                 }
 978                 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
 979                                           0, MLX4_MCAST_ENABLE);
 980                 if (err)
 981                         en_err(priv, "Failed enabling multicast filter\n");
 982
 983                 update_mclist_flags(priv, &priv->curr_list, &priv->mc_list);
 984                 list_for_each_entry_safe(mclist, tmp, &priv->curr_list, list) {
 985                         if (mclist->action == MCLIST_REM) {
 986                                 /* detach this address and delete from list */
 987                                 memcpy(&mc_list[10], mclist->addr, ETH_ALEN);
 988                                 mc_list[5] = priv->port;
 989                                 err = mlx4_multicast_detach(mdev->dev,
 990                                                             &priv->rss_map.indir_qp,
 991                                                             mc_list,
 992                                                             MLX4_PROT_ETH,
 993                                                             mclist->reg_id);
 994                                 if (err)
 995                                         en_err(priv, "Fail to detach multicast address\n");
 996
 997                                 /* remove from list */
 998                                 list_del(&mclist->list);
 999                                 kfree(mclist);
1000                         } else if (mclist->action == MCLIST_ADD) {
1001                                 /* attach the address */
1002                                 memcpy(&mc_list[10], mclist->addr, ETH_ALEN);
1003                                 /* needed for B0 steering support */
1004                                 mc_list[5] = priv->port;
1005                                 err = mlx4_multicast_attach(mdev->dev,
1006                                                             &priv->rss_map.indir_qp,
1007                                                             mc_list,
1008                                                             priv->port, 0,
1009                                                             MLX4_PROT_ETH,
1010                                                             &mclist->reg_id);
1011                                 if (err)
1012                                         en_err(priv, "Fail to attach multicast address\n");
1013
1014                         }
1015                 }
1016         }
1017 }
1018
1019 static void mlx4_en_do_set_rx_mode(struct work_struct *work)
1020 {
1021         struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
1022                                                  rx_mode_task);
1023         struct mlx4_en_dev *mdev = priv->mdev;
1024         struct net_device *dev = priv->dev;
1025
1026         mutex_lock(&mdev->state_lock);
1027         if (!mdev->device_up) {
1028                 en_dbg(HW, priv, "Card is not up, ignoring rx mode change.\n");
1029                 goto out;
1030         }
1031         if (!priv->port_up) {
1032                 en_dbg(HW, priv, "Port is down, ignoring rx mode change.\n");
1033                 goto out;
1034         }
1035
1036         if (!netif_carrier_ok(dev)) {
1037                 if (!mlx4_en_QUERY_PORT(mdev, priv->port)) {
1038                         if (priv->port_state.link_state) {
1039                                 priv->last_link_state = MLX4_DEV_EVENT_PORT_UP;
1040                                 netif_carrier_on(dev);
1041                                 en_dbg(LINK, priv, "Link Up\n");
1042                         }
1043                 }
1044         }
1045
1046         /* Promsicuous mode: disable all filters */
1047         if (dev->flags & IFF_PROMISC) {
1048                 mlx4_en_set_promisc_mode(priv, mdev);
1049                 goto out;
1050         }
1051
1052         /* Not in promiscuous mode */
1053         if (priv->flags & MLX4_EN_FLAG_PROMISC)
1054                 mlx4_en_clear_promisc_mode(priv, mdev);
1055
1056         mlx4_en_do_multicast(priv, dev, mdev);
1057 out:
1058         mutex_unlock(&mdev->state_lock);
1059 }
1060
1061 #ifdef CONFIG_NET_POLL_CONTROLLER
1062 static void mlx4_en_netpoll(struct net_device *dev)
1063 {
1064         struct mlx4_en_priv *priv = netdev_priv(dev);
1065         struct mlx4_en_cq *cq;
1066         unsigned long flags;
1067         int i;
1068
1069         for (i = 0; i < priv->rx_ring_num; i++) {
1070                 cq = &priv->rx_cq[i];
1071                 spin_lock_irqsave(&cq->lock, flags);
1072                 napi_synchronize(&cq->napi);
1073                 mlx4_en_process_rx_cq(dev, cq, 0);
1074                 spin_unlock_irqrestore(&cq->lock, flags);
1075         }
1076 }
1077 #endif
1078
1079 static void mlx4_en_tx_timeout(struct net_device *dev)
1080 {
1081         struct mlx4_en_priv *priv = netdev_priv(dev);
1082         struct mlx4_en_dev *mdev = priv->mdev;
1083
1084         if (netif_msg_timer(priv))
1085                 en_warn(priv, "Tx timeout called on port:%d\n", priv->port);
1086
1087         priv->port_stats.tx_timeout++;
1088         en_dbg(DRV, priv, "Scheduling watchdog\n");
1089         queue_work(mdev->workqueue, &priv->watchdog_task);
1090 }
1091
1092
1093 static struct net_device_stats *mlx4_en_get_stats(struct net_device *dev)
1094 {
1095         struct mlx4_en_priv *priv = netdev_priv(dev);
1096
1097         spin_lock_bh(&priv->stats_lock);
1098         memcpy(&priv->ret_stats, &priv->stats, sizeof(priv->stats));
1099         spin_unlock_bh(&priv->stats_lock);
1100
1101         return &priv->ret_stats;
1102 }
1103
1104 static void mlx4_en_set_default_moderation(struct mlx4_en_priv *priv)
1105 {
1106         struct mlx4_en_cq *cq;
1107         int i;
1108
1109         /* If we haven't received a specific coalescing setting
1110          * (module param), we set the moderation parameters as follows:
1111          * - moder_cnt is set to the number of mtu sized packets to
1112          *   satisfy our coalescing target.
1113          * - moder_time is set to a fixed value.
1114          */
1115         priv->rx_frames = MLX4_EN_RX_COAL_TARGET;
1116         priv->rx_usecs = MLX4_EN_RX_COAL_TIME;
1117         priv->tx_frames = MLX4_EN_TX_COAL_PKTS;
1118         priv->tx_usecs = MLX4_EN_TX_COAL_TIME;
1119         en_dbg(INTR, priv, "Default coalesing params for mtu:%d - rx_frames:%d rx_usecs:%d\n",
1120                priv->dev->mtu, priv->rx_frames, priv->rx_usecs);
1121
1122         /* Setup cq moderation params */
1123         for (i = 0; i < priv->rx_ring_num; i++) {
1124                 cq = &priv->rx_cq[i];
1125                 cq->moder_cnt = priv->rx_frames;
1126                 cq->moder_time = priv->rx_usecs;
1127                 priv->last_moder_time[i] = MLX4_EN_AUTO_CONF;
1128                 priv->last_moder_packets[i] = 0;
1129                 priv->last_moder_bytes[i] = 0;
1130         }
1131
1132         for (i = 0; i < priv->tx_ring_num; i++) {
1133                 cq = &priv->tx_cq[i];
1134                 cq->moder_cnt = priv->tx_frames;
1135                 cq->moder_time = priv->tx_usecs;
1136         }
1137
1138         /* Reset auto-moderation params */
1139         priv->pkt_rate_low = MLX4_EN_RX_RATE_LOW;
1140         priv->rx_usecs_low = MLX4_EN_RX_COAL_TIME_LOW;
1141         priv->pkt_rate_high = MLX4_EN_RX_RATE_HIGH;
1142         priv->rx_usecs_high = MLX4_EN_RX_COAL_TIME_HIGH;
1143         priv->sample_interval = MLX4_EN_SAMPLE_INTERVAL;
1144         priv->adaptive_rx_coal = 1;
1145         priv->last_moder_jiffies = 0;
1146         priv->last_moder_tx_packets = 0;
1147 }
1148
1149 static void mlx4_en_auto_moderation(struct mlx4_en_priv *priv)
1150 {
1151         unsigned long period = (unsigned long) (jiffies - priv->last_moder_jiffies);
1152         struct mlx4_en_cq *cq;
1153         unsigned long packets;
1154         unsigned long rate;
1155         unsigned long avg_pkt_size;
1156         unsigned long rx_packets;
1157         unsigned long rx_bytes;
1158         unsigned long rx_pkt_diff;
1159         int moder_time;
1160         int ring, err;
1161
1162         if (!priv->adaptive_rx_coal || period < priv->sample_interval * HZ)
1163                 return;
1164
1165         for (ring = 0; ring < priv->rx_ring_num; ring++) {
1166                 spin_lock_bh(&priv->stats_lock);
1167                 rx_packets = priv->rx_ring[ring].packets;
1168                 rx_bytes = priv->rx_ring[ring].bytes;
1169                 spin_unlock_bh(&priv->stats_lock);
1170
1171                 rx_pkt_diff = ((unsigned long) (rx_packets -
1172                                 priv->last_moder_packets[ring]));
1173                 packets = rx_pkt_diff;
1174                 rate = packets * HZ / period;
1175                 avg_pkt_size = packets ? ((unsigned long) (rx_bytes -
1176                                 priv->last_moder_bytes[ring])) / packets : 0;
1177
1178                 /* Apply auto-moderation only when packet rate
1179                  * exceeds a rate that it matters */
1180                 if (rate > (MLX4_EN_RX_RATE_THRESH / priv->rx_ring_num) &&
1181                     avg_pkt_size > MLX4_EN_AVG_PKT_SMALL) {
1182                         if (rate < priv->pkt_rate_low)
1183                                 moder_time = priv->rx_usecs_low;
1184                         else if (rate > priv->pkt_rate_high)
1185                                 moder_time = priv->rx_usecs_high;
1186                         else
1187                                 moder_time = (rate - priv->pkt_rate_low) *
1188                                         (priv->rx_usecs_high - priv->rx_usecs_low) /
1189                                         (priv->pkt_rate_high - priv->pkt_rate_low) +
1190                                         priv->rx_usecs_low;
1191                 } else {
1192                         moder_time = priv->rx_usecs_low;
1193                 }
1194
1195                 if (moder_time != priv->last_moder_time[ring]) {
1196                         priv->last_moder_time[ring] = moder_time;
1197                         cq = &priv->rx_cq[ring];
1198                         cq->moder_time = moder_time;
1199                         err = mlx4_en_set_cq_moder(priv, cq);
1200                         if (err)
1201                                 en_err(priv, "Failed modifying moderation for cq:%d\n",
1202                                        ring);
1203                 }
1204                 priv->last_moder_packets[ring] = rx_packets;
1205                 priv->last_moder_bytes[ring] = rx_bytes;
1206         }
1207
1208         priv->last_moder_jiffies = jiffies;
1209 }
1210
1211 static void mlx4_en_do_get_stats(struct work_struct *work)
1212 {
1213         struct delayed_work *delay = to_delayed_work(work);
1214         struct mlx4_en_priv *priv = container_of(delay, struct mlx4_en_priv,
1215                                                  stats_task);
1216         struct mlx4_en_dev *mdev = priv->mdev;
1217         int err;
1218
1219         mutex_lock(&mdev->state_lock);
1220         if (mdev->device_up) {
1221                 err = mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 0);
1222                 if (err)
1223                         en_dbg(HW, priv, "Could not update stats\n");
1224
1225                 if (priv->port_up)
1226                         mlx4_en_auto_moderation(priv);
1227
1228                 queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);
1229         }
1230         if (mdev->mac_removed[MLX4_MAX_PORTS + 1 - priv->port]) {
1231                 queue_work(mdev->workqueue, &priv->mac_task);
1232                 mdev->mac_removed[MLX4_MAX_PORTS + 1 - priv->port] = 0;
1233         }
1234         mutex_unlock(&mdev->state_lock);
1235 }
1236
1237 static void mlx4_en_linkstate(struct work_struct *work)
1238 {
1239         struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
1240                                                  linkstate_task);
1241         struct mlx4_en_dev *mdev = priv->mdev;
1242         int linkstate = priv->link_state;
1243
1244         mutex_lock(&mdev->state_lock);
1245         /* If observable port state changed set carrier state and
1246          * report to system log */
1247         if (priv->last_link_state != linkstate) {
1248                 if (linkstate == MLX4_DEV_EVENT_PORT_DOWN) {
1249                         en_info(priv, "Link Down\n");
1250                         netif_carrier_off(priv->dev);
1251                 } else {
1252                         en_info(priv, "Link Up\n");
1253                         netif_carrier_on(priv->dev);
1254                 }
1255         }
1256         priv->last_link_state = linkstate;
1257         mutex_unlock(&mdev->state_lock);
1258 }
1259
1260
1261 int mlx4_en_start_port(struct net_device *dev)
1262 {
1263         struct mlx4_en_priv *priv = netdev_priv(dev);
1264         struct mlx4_en_dev *mdev = priv->mdev;
1265         struct mlx4_en_cq *cq;
1266         struct mlx4_en_tx_ring *tx_ring;
1267         int rx_index = 0;
1268         int tx_index = 0;
1269         int err = 0;
1270         int i;
1271         int j;
1272         u8 mc_list[16] = {0};
1273
1274         if (priv->port_up) {
1275                 en_dbg(DRV, priv, "start port called while port already up\n");
1276                 return 0;
1277         }
1278
1279         INIT_LIST_HEAD(&priv->mc_list);
1280         INIT_LIST_HEAD(&priv->curr_list);
1281         INIT_LIST_HEAD(&priv->ethtool_list);
1282         memset(&priv->ethtool_rules[0], 0,
1283                sizeof(struct ethtool_flow_id) * MAX_NUM_OF_FS_RULES);
1284
1285         /* Calculate Rx buf size */
1286         dev->mtu = min(dev->mtu, priv->max_mtu);
1287         mlx4_en_calc_rx_buf(dev);
1288         en_dbg(DRV, priv, "Rx buf size:%d\n", priv->rx_skb_size);
1289
1290         /* Configure rx cq's and rings */
1291         err = mlx4_en_activate_rx_rings(priv);
1292         if (err) {
1293                 en_err(priv, "Failed to activate RX rings\n");
1294                 return err;
1295         }
1296         for (i = 0; i < priv->rx_ring_num; i++) {
1297                 cq = &priv->rx_cq[i];
1298
1299                 err = mlx4_en_activate_cq(priv, cq, i);
1300                 if (err) {
1301                         en_err(priv, "Failed activating Rx CQ\n");
1302                         goto cq_err;
1303                 }
1304                 for (j = 0; j < cq->size; j++)
1305                         cq->buf[j].owner_sr_opcode = MLX4_CQE_OWNER_MASK;
1306                 err = mlx4_en_set_cq_moder(priv, cq);
1307                 if (err) {
1308                         en_err(priv, "Failed setting cq moderation parameters");
1309                         mlx4_en_deactivate_cq(priv, cq);
1310                         goto cq_err;
1311                 }
1312                 mlx4_en_arm_cq(priv, cq);
1313                 priv->rx_ring[i].cqn = cq->mcq.cqn;
1314                 ++rx_index;
1315         }
1316
1317         /* Set qp number */
1318         en_dbg(DRV, priv, "Getting qp number for port %d\n", priv->port);
1319         err = mlx4_en_get_qp(priv);
1320         if (err) {
1321                 en_err(priv, "Failed getting eth qp\n");
1322                 goto cq_err;
1323         }
1324         mdev->mac_removed[priv->port] = 0;
1325
1326         err = mlx4_en_config_rss_steer(priv);
1327         if (err) {
1328                 en_err(priv, "Failed configuring rss steering\n");
1329                 goto mac_err;
1330         }
1331
1332         err = mlx4_en_create_drop_qp(priv);
1333         if (err)
1334                 goto rss_err;
1335
1336         /* Configure tx cq's and rings */
1337         for (i = 0; i < priv->tx_ring_num; i++) {
1338                 /* Configure cq */
1339                 cq = &priv->tx_cq[i];
1340                 err = mlx4_en_activate_cq(priv, cq, i);
1341                 if (err) {
1342                         en_err(priv, "Failed allocating Tx CQ\n");
1343                         goto tx_err;
1344                 }
1345                 err = mlx4_en_set_cq_moder(priv, cq);
1346                 if (err) {
1347                         en_err(priv, "Failed setting cq moderation parameters");
1348                         mlx4_en_deactivate_cq(priv, cq);
1349                         goto tx_err;
1350                 }
1351                 en_dbg(DRV, priv, "Resetting index of collapsed CQ:%d to -1\n", i);
1352                 cq->buf->wqe_index = cpu_to_be16(0xffff);
1353
1354                 /* Configure ring */
1355                 tx_ring = &priv->tx_ring[i];
1356                 err = mlx4_en_activate_tx_ring(priv, tx_ring, cq->mcq.cqn,
1357                         i / priv->num_tx_rings_p_up);
1358                 if (err) {
1359                         en_err(priv, "Failed allocating Tx ring\n");
1360                         mlx4_en_deactivate_cq(priv, cq);
1361                         goto tx_err;
1362                 }
1363                 tx_ring->tx_queue = netdev_get_tx_queue(dev, i);
1364
1365                 /* Arm CQ for TX completions */
1366                 mlx4_en_arm_cq(priv, cq);
1367
1368                 /* Set initial ownership of all Tx TXBBs to SW (1) */
1369                 for (j = 0; j < tx_ring->buf_size; j += STAMP_STRIDE)
1370                         *((u32 *) (tx_ring->buf + j)) = 0xffffffff;
1371                 ++tx_index;
1372         }
1373
1374         /* Configure port */
1375         err = mlx4_SET_PORT_general(mdev->dev, priv->port,
1376                                     priv->rx_skb_size + ETH_FCS_LEN,
1377                                     priv->prof->tx_pause,
1378                                     priv->prof->tx_ppp,
1379                                     priv->prof->rx_pause,
1380                                     priv->prof->rx_ppp);
1381         if (err) {
1382                 en_err(priv, "Failed setting port general configurations for port %d, with error %d\n",
1383                        priv->port, err);
1384                 goto tx_err;
1385         }
1386         /* Set default qp number */
1387         err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port, priv->base_qpn, 0);
1388         if (err) {
1389                 en_err(priv, "Failed setting default qp numbers\n");
1390                 goto tx_err;
1391         }
1392
1393         /* Init port */
1394         en_dbg(HW, priv, "Initializing port\n");
1395         err = mlx4_INIT_PORT(mdev->dev, priv->port);
1396         if (err) {
1397                 en_err(priv, "Failed Initializing port\n");
1398                 goto tx_err;
1399         }
1400
1401         /* Attach rx QP to bradcast address */
1402         memset(&mc_list[10], 0xff, ETH_ALEN);
1403         mc_list[5] = priv->port; /* needed for B0 steering support */
1404         if (mlx4_multicast_attach(mdev->dev, &priv->rss_map.indir_qp, mc_list,
1405                                   priv->port, 0, MLX4_PROT_ETH,
1406                                   &priv->broadcast_id))
1407                 mlx4_warn(mdev, "Failed Attaching Broadcast\n");
1408
1409         /* Must redo promiscuous mode setup. */
1410         priv->flags &= ~(MLX4_EN_FLAG_PROMISC | MLX4_EN_FLAG_MC_PROMISC);
1411
1412         /* Schedule multicast task to populate multicast list */
1413         queue_work(mdev->workqueue, &priv->rx_mode_task);
1414
1415         mlx4_set_stats_bitmap(mdev->dev, &priv->stats_bitmap);
1416
1417         priv->port_up = true;
1418         netif_tx_start_all_queues(dev);
1419         netif_device_attach(dev);
1420
1421         return 0;
1422
1423 tx_err:
1424         while (tx_index--) {
1425                 mlx4_en_deactivate_tx_ring(priv, &priv->tx_ring[tx_index]);
1426                 mlx4_en_deactivate_cq(priv, &priv->tx_cq[tx_index]);
1427         }
1428         mlx4_en_destroy_drop_qp(priv);
1429 rss_err:
1430         mlx4_en_release_rss_steer(priv);
1431 mac_err:
1432         mlx4_en_put_qp(priv);
1433 cq_err:
1434         while (rx_index--)
1435                 mlx4_en_deactivate_cq(priv, &priv->rx_cq[rx_index]);
1436         for (i = 0; i < priv->rx_ring_num; i++)
1437                 mlx4_en_deactivate_rx_ring(priv, &priv->rx_ring[i]);
1438
1439         return err; /* need to close devices */
1440 }
1441
1442
1443 void mlx4_en_stop_port(struct net_device *dev, int detach)
1444 {
1445         struct mlx4_en_priv *priv = netdev_priv(dev);
1446         struct mlx4_en_dev *mdev = priv->mdev;
1447         struct mlx4_en_mc_list *mclist, *tmp;
1448         struct ethtool_flow_id *flow, *tmp_flow;
1449         int i;
1450         u8 mc_list[16] = {0};
1451
1452         if (!priv->port_up) {
1453                 en_dbg(DRV, priv, "stop port called while port already down\n");
1454                 return;
1455         }
1456
1457         /* Synchronize with tx routine */
1458         netif_tx_lock_bh(dev);
1459         if (detach)
1460                 netif_device_detach(dev);
1461         netif_tx_stop_all_queues(dev);
1462         netif_tx_unlock_bh(dev);
1463
1464         netif_tx_disable(dev);
1465
1466         /* Set port as not active */
1467         priv->port_up = false;
1468
1469         /* Promsicuous mode */
1470         if (mdev->dev->caps.steering_mode ==
1471             MLX4_STEERING_MODE_DEVICE_MANAGED) {
1472                 priv->flags &= ~(MLX4_EN_FLAG_PROMISC |
1473                                  MLX4_EN_FLAG_MC_PROMISC);
1474                 mlx4_flow_steer_promisc_remove(mdev->dev,
1475                                                priv->port,
1476                                                MLX4_FS_PROMISC_UPLINK);
1477                 mlx4_flow_steer_promisc_remove(mdev->dev,
1478                                                priv->port,
1479                                                MLX4_FS_PROMISC_ALL_MULTI);
1480         } else if (priv->flags & MLX4_EN_FLAG_PROMISC) {
1481                 priv->flags &= ~MLX4_EN_FLAG_PROMISC;
1482
1483                 /* Disable promiscouos mode */
1484                 mlx4_unicast_promisc_remove(mdev->dev, priv->base_qpn,
1485                                             priv->port);
1486
1487                 /* Disable Multicast promisc */
1488                 if (priv->flags & MLX4_EN_FLAG_MC_PROMISC) {
1489                         mlx4_multicast_promisc_remove(mdev->dev, priv->base_qpn,
1490                                                       priv->port);
1491                         priv->flags &= ~MLX4_EN_FLAG_MC_PROMISC;
1492                 }
1493         }
1494
1495         /* Detach All multicasts */
1496         memset(&mc_list[10], 0xff, ETH_ALEN);
1497         mc_list[5] = priv->port; /* needed for B0 steering support */
1498         mlx4_multicast_detach(mdev->dev, &priv->rss_map.indir_qp, mc_list,
1499                               MLX4_PROT_ETH, priv->broadcast_id);
1500         list_for_each_entry(mclist, &priv->curr_list, list) {
1501                 memcpy(&mc_list[10], mclist->addr, ETH_ALEN);
1502                 mc_list[5] = priv->port;
1503                 mlx4_multicast_detach(mdev->dev, &priv->rss_map.indir_qp,
1504                                       mc_list, MLX4_PROT_ETH, mclist->reg_id);
1505         }
1506         mlx4_en_clear_list(dev);
1507         list_for_each_entry_safe(mclist, tmp, &priv->curr_list, list) {
1508                 list_del(&mclist->list);
1509                 kfree(mclist);
1510         }
1511
1512         /* Flush multicast filter */
1513         mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0, 1, MLX4_MCAST_CONFIG);
1514
1515         mlx4_en_destroy_drop_qp(priv);
1516
1517         /* Free TX Rings */
1518         for (i = 0; i < priv->tx_ring_num; i++) {
1519                 mlx4_en_deactivate_tx_ring(priv, &priv->tx_ring[i]);
1520                 mlx4_en_deactivate_cq(priv, &priv->tx_cq[i]);
1521         }
1522         msleep(10);
1523
1524         for (i = 0; i < priv->tx_ring_num; i++)
1525                 mlx4_en_free_tx_buf(dev, &priv->tx_ring[i]);
1526
1527         /* Free RSS qps */
1528         mlx4_en_release_rss_steer(priv);
1529
1530         /* Unregister Mac address for the port */
1531         mlx4_en_put_qp(priv);
1532         if (!(mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAGS2_REASSIGN_MAC_EN))
1533                 mdev->mac_removed[priv->port] = 1;
1534
1535         /* Remove flow steering rules for the port*/
1536         if (mdev->dev->caps.steering_mode ==
1537             MLX4_STEERING_MODE_DEVICE_MANAGED) {
1538                 ASSERT_RTNL();
1539                 list_for_each_entry_safe(flow, tmp_flow,
1540                                          &priv->ethtool_list, list) {
1541                         mlx4_flow_detach(mdev->dev, flow->id);
1542                         list_del(&flow->list);
1543                 }
1544         }
1545
1546         /* Free RX Rings */
1547         for (i = 0; i < priv->rx_ring_num; i++) {
1548                 mlx4_en_deactivate_rx_ring(priv, &priv->rx_ring[i]);
1549                 while (test_bit(NAPI_STATE_SCHED, &priv->rx_cq[i].napi.state))
1550                         msleep(1);
1551                 mlx4_en_deactivate_cq(priv, &priv->rx_cq[i]);
1552         }
1553
1554         /* close port*/
1555         mlx4_CLOSE_PORT(mdev->dev, priv->port);
1556 }
1557
1558 static void mlx4_en_restart(struct work_struct *work)
1559 {
1560         struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
1561                                                  watchdog_task);
1562         struct mlx4_en_dev *mdev = priv->mdev;
1563         struct net_device *dev = priv->dev;
1564         int i;
1565
1566         en_dbg(DRV, priv, "Watchdog task called for port %d\n", priv->port);
1567
1568         mutex_lock(&mdev->state_lock);
1569         if (priv->port_up) {
1570                 mlx4_en_stop_port(dev, 1);
1571                 for (i = 0; i < priv->tx_ring_num; i++)
1572                         netdev_tx_reset_queue(priv->tx_ring[i].tx_queue);
1573                 if (mlx4_en_start_port(dev))
1574                         en_err(priv, "Failed restarting port %d\n", priv->port);
1575         }
1576         mutex_unlock(&mdev->state_lock);
1577 }
1578
1579 static void mlx4_en_clear_stats(struct net_device *dev)
1580 {
1581         struct mlx4_en_priv *priv = netdev_priv(dev);
1582         struct mlx4_en_dev *mdev = priv->mdev;
1583         int i;
1584
1585         if (mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 1))
1586                 en_dbg(HW, priv, "Failed dumping statistics\n");
1587
1588         memset(&priv->stats, 0, sizeof(priv->stats));
1589         memset(&priv->pstats, 0, sizeof(priv->pstats));
1590         memset(&priv->pkstats, 0, sizeof(priv->pkstats));
1591         memset(&priv->port_stats, 0, sizeof(priv->port_stats));
1592
1593         for (i = 0; i < priv->tx_ring_num; i++) {
1594                 priv->tx_ring[i].bytes = 0;
1595                 priv->tx_ring[i].packets = 0;
1596                 priv->tx_ring[i].tx_csum = 0;
1597         }
1598         for (i = 0; i < priv->rx_ring_num; i++) {
1599                 priv->rx_ring[i].bytes = 0;
1600                 priv->rx_ring[i].packets = 0;
1601                 priv->rx_ring[i].csum_ok = 0;
1602                 priv->rx_ring[i].csum_none = 0;
1603         }
1604 }
1605
1606 static int mlx4_en_open(struct net_device *dev)
1607 {
1608         struct mlx4_en_priv *priv = netdev_priv(dev);
1609         struct mlx4_en_dev *mdev = priv->mdev;
1610         int err = 0;
1611
1612         mutex_lock(&mdev->state_lock);
1613
1614         if (!mdev->device_up) {
1615                 en_err(priv, "Cannot open - device down/disabled\n");
1616                 err = -EBUSY;
1617                 goto out;
1618         }
1619
1620         /* Reset HW statistics and SW counters */
1621         mlx4_en_clear_stats(dev);
1622
1623         err = mlx4_en_start_port(dev);
1624         if (err)
1625                 en_err(priv, "Failed starting port:%d\n", priv->port);
1626
1627 out:
1628         mutex_unlock(&mdev->state_lock);
1629         return err;
1630 }
1631
1632
1633 static int mlx4_en_close(struct net_device *dev)
1634 {
1635         struct mlx4_en_priv *priv = netdev_priv(dev);
1636         struct mlx4_en_dev *mdev = priv->mdev;
1637
1638         en_dbg(IFDOWN, priv, "Close port called\n");
1639
1640         mutex_lock(&mdev->state_lock);
1641
1642         mlx4_en_stop_port(dev, 0);
1643         netif_carrier_off(dev);
1644
1645         mutex_unlock(&mdev->state_lock);
1646         return 0;
1647 }
1648
1649 void mlx4_en_free_resources(struct mlx4_en_priv *priv)
1650 {
1651         int i;
1652
1653 #ifdef CONFIG_RFS_ACCEL
1654         free_irq_cpu_rmap(priv->dev->rx_cpu_rmap);
1655         priv->dev->rx_cpu_rmap = NULL;
1656 #endif
1657
1658         for (i = 0; i < priv->tx_ring_num; i++) {
1659                 if (priv->tx_ring[i].tx_info)
1660                         mlx4_en_destroy_tx_ring(priv, &priv->tx_ring[i]);
1661                 if (priv->tx_cq[i].buf)
1662                         mlx4_en_destroy_cq(priv, &priv->tx_cq[i]);
1663         }
1664
1665         for (i = 0; i < priv->rx_ring_num; i++) {
1666                 if (priv->rx_ring[i].rx_info)
1667                         mlx4_en_destroy_rx_ring(priv, &priv->rx_ring[i],
1668                                 priv->prof->rx_ring_size, priv->stride);
1669                 if (priv->rx_cq[i].buf)
1670                         mlx4_en_destroy_cq(priv, &priv->rx_cq[i]);
1671         }
1672
1673         if (priv->base_tx_qpn) {
1674                 mlx4_qp_release_range(priv->mdev->dev, priv->base_tx_qpn, priv->tx_ring_num);
1675                 priv->base_tx_qpn = 0;
1676         }
1677 }
1678
1679 int mlx4_en_alloc_resources(struct mlx4_en_priv *priv)
1680 {
1681         struct mlx4_en_port_profile *prof = priv->prof;
1682         int i;
1683         int err;
1684
1685         err = mlx4_qp_reserve_range(priv->mdev->dev, priv->tx_ring_num, 256, &priv->base_tx_qpn);
1686         if (err) {
1687                 en_err(priv, "failed reserving range for TX rings\n");
1688                 return err;
1689         }
1690
1691         /* Create tx Rings */
1692         for (i = 0; i < priv->tx_ring_num; i++) {
1693                 if (mlx4_en_create_cq(priv, &priv->tx_cq[i],
1694                                       prof->tx_ring_size, i, TX))
1695                         goto err;
1696
1697                 if (mlx4_en_create_tx_ring(priv, &priv->tx_ring[i], priv->base_tx_qpn + i,
1698                                            prof->tx_ring_size, TXBB_SIZE))
1699                         goto err;
1700         }
1701
1702         /* Create rx Rings */
1703         for (i = 0; i < priv->rx_ring_num; i++) {
1704                 if (mlx4_en_create_cq(priv, &priv->rx_cq[i],
1705                                       prof->rx_ring_size, i, RX))
1706                         goto err;
1707
1708                 if (mlx4_en_create_rx_ring(priv, &priv->rx_ring[i],
1709                                            prof->rx_ring_size, priv->stride))
1710                         goto err;
1711         }
1712
1713 #ifdef CONFIG_RFS_ACCEL
1714         priv->dev->rx_cpu_rmap = alloc_irq_cpu_rmap(priv->rx_ring_num);
1715         if (!priv->dev->rx_cpu_rmap)
1716                 goto err;
1717 #endif
1718
1719         return 0;
1720
1721 err:
1722         en_err(priv, "Failed to allocate NIC resources\n");
1723         return -ENOMEM;
1724 }
1725
1726
1727 void mlx4_en_destroy_netdev(struct net_device *dev)
1728 {
1729         struct mlx4_en_priv *priv = netdev_priv(dev);
1730         struct mlx4_en_dev *mdev = priv->mdev;
1731
1732         en_dbg(DRV, priv, "Destroying netdev on port:%d\n", priv->port);
1733
1734         /* Unregister device - this will close the port if it was up */
1735         if (priv->registered)
1736                 unregister_netdev(dev);
1737
1738         if (priv->allocated)
1739                 mlx4_free_hwq_res(mdev->dev, &priv->res, MLX4_EN_PAGE_SIZE);
1740
1741         cancel_delayed_work(&priv->stats_task);
1742         /* flush any pending task for this netdev */
1743         flush_workqueue(mdev->workqueue);
1744
1745         /* Detach the netdev so tasks would not attempt to access it */
1746         mutex_lock(&mdev->state_lock);
1747         mdev->pndev[priv->port] = NULL;
1748         mutex_unlock(&mdev->state_lock);
1749
1750         mlx4_en_free_resources(priv);
1751
1752         kfree(priv->tx_ring);
1753         kfree(priv->tx_cq);
1754
1755         free_netdev(dev);
1756 }
1757
1758 static int mlx4_en_change_mtu(struct net_device *dev, int new_mtu)
1759 {
1760         struct mlx4_en_priv *priv = netdev_priv(dev);
1761         struct mlx4_en_dev *mdev = priv->mdev;
1762         int err = 0;
1763
1764         en_dbg(DRV, priv, "Change MTU called - current:%d new:%d\n",
1765                  dev->mtu, new_mtu);
1766
1767         if ((new_mtu < MLX4_EN_MIN_MTU) || (new_mtu > priv->max_mtu)) {
1768                 en_err(priv, "Bad MTU size:%d.\n", new_mtu);
1769                 return -EPERM;
1770         }
1771         dev->mtu = new_mtu;
1772
1773         if (netif_running(dev)) {
1774                 mutex_lock(&mdev->state_lock);
1775                 if (!mdev->device_up) {
1776                         /* NIC is probably restarting - let watchdog task reset
1777                          * the port */
1778                         en_dbg(DRV, priv, "Change MTU called with card down!?\n");
1779                 } else {
1780                         mlx4_en_stop_port(dev, 1);
1781                         err = mlx4_en_start_port(dev);
1782                         if (err) {
1783                                 en_err(priv, "Failed restarting port:%d\n",
1784                                          priv->port);
1785                                 queue_work(mdev->workqueue, &priv->watchdog_task);
1786                         }
1787                 }
1788                 mutex_unlock(&mdev->state_lock);
1789         }
1790         return 0;
1791 }
1792
1793 static int mlx4_en_set_features(struct net_device *netdev,
1794                 netdev_features_t features)
1795 {
1796         struct mlx4_en_priv *priv = netdev_priv(netdev);
1797
1798         if (features & NETIF_F_LOOPBACK)
1799                 priv->ctrl_flags |= cpu_to_be32(MLX4_WQE_CTRL_FORCE_LOOPBACK);
1800         else
1801                 priv->ctrl_flags &=
1802                         cpu_to_be32(~MLX4_WQE_CTRL_FORCE_LOOPBACK);
1803
1804         mlx4_en_update_loopback_state(netdev, features);
1805
1806         return 0;
1807
1808 }
1809
1810 static const struct net_device_ops mlx4_netdev_ops = {
1811         .ndo_open               = mlx4_en_open,
1812         .ndo_stop               = mlx4_en_close,
1813         .ndo_start_xmit         = mlx4_en_xmit,
1814         .ndo_select_queue       = mlx4_en_select_queue,
1815         .ndo_get_stats          = mlx4_en_get_stats,
1816         .ndo_set_rx_mode        = mlx4_en_set_rx_mode,
1817         .ndo_set_mac_address    = mlx4_en_set_mac,
1818         .ndo_validate_addr      = eth_validate_addr,
1819         .ndo_change_mtu         = mlx4_en_change_mtu,
1820         .ndo_tx_timeout         = mlx4_en_tx_timeout,
1821         .ndo_vlan_rx_add_vid    = mlx4_en_vlan_rx_add_vid,
1822         .ndo_vlan_rx_kill_vid   = mlx4_en_vlan_rx_kill_vid,
1823 #ifdef CONFIG_NET_POLL_CONTROLLER
1824         .ndo_poll_controller    = mlx4_en_netpoll,
1825 #endif
1826         .ndo_set_features       = mlx4_en_set_features,
1827         .ndo_setup_tc           = mlx4_en_setup_tc,
1828 #ifdef CONFIG_RFS_ACCEL
1829         .ndo_rx_flow_steer      = mlx4_en_filter_rfs,
1830 #endif
1831 };
1832
1833 int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port,
1834                         struct mlx4_en_port_profile *prof)
1835 {
1836         struct net_device *dev;
1837         struct mlx4_en_priv *priv;
1838         int i;
1839         int err;
1840
1841         dev = alloc_etherdev_mqs(sizeof(struct mlx4_en_priv),
1842                                  MAX_TX_RINGS, MAX_RX_RINGS);
1843         if (dev == NULL)
1844                 return -ENOMEM;
1845
1846         netif_set_real_num_tx_queues(dev, prof->tx_ring_num);
1847         netif_set_real_num_rx_queues(dev, prof->rx_ring_num);
1848
1849         SET_NETDEV_DEV(dev, &mdev->dev->pdev->dev);
1850         dev->dev_id =  port - 1;
1851
1852         /*
1853          * Initialize driver private data
1854          */
1855
1856         priv = netdev_priv(dev);
1857         memset(priv, 0, sizeof(struct mlx4_en_priv));
1858         priv->dev = dev;
1859         priv->mdev = mdev;
1860         priv->ddev = &mdev->pdev->dev;
1861         priv->prof = prof;
1862         priv->port = port;
1863         priv->port_up = false;
1864         priv->flags = prof->flags;
1865         priv->ctrl_flags = cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE |
1866                         MLX4_WQE_CTRL_SOLICITED);
1867         priv->num_tx_rings_p_up = mdev->profile.num_tx_rings_p_up;
1868         priv->tx_ring_num = prof->tx_ring_num;
1869
1870         priv->tx_ring = kzalloc(sizeof(struct mlx4_en_tx_ring) * MAX_TX_RINGS,
1871                                 GFP_KERNEL);
1872         if (!priv->tx_ring) {
1873                 err = -ENOMEM;
1874                 goto out;
1875         }
1876         priv->tx_cq = kzalloc(sizeof(struct mlx4_en_cq) * MAX_RX_RINGS,
1877                               GFP_KERNEL);
1878         if (!priv->tx_cq) {
1879                 err = -ENOMEM;
1880                 goto out;
1881         }
1882         priv->rx_ring_num = prof->rx_ring_num;
1883         priv->cqe_factor = (mdev->dev->caps.cqe_size == 64) ? 1 : 0;
1884         priv->mac_index = -1;
1885         priv->msg_enable = MLX4_EN_MSG_LEVEL;
1886         spin_lock_init(&priv->stats_lock);
1887         INIT_WORK(&priv->rx_mode_task, mlx4_en_do_set_rx_mode);
1888         INIT_WORK(&priv->mac_task, mlx4_en_do_set_mac);
1889         INIT_WORK(&priv->watchdog_task, mlx4_en_restart);
1890         INIT_WORK(&priv->linkstate_task, mlx4_en_linkstate);
1891         INIT_DELAYED_WORK(&priv->stats_task, mlx4_en_do_get_stats);
1892 #ifdef CONFIG_MLX4_EN_DCB
1893         if (!mlx4_is_slave(priv->mdev->dev))
1894                 dev->dcbnl_ops = &mlx4_en_dcbnl_ops;
1895 #endif
1896
1897         for (i = 0; i < MLX4_EN_MAC_HASH_SIZE; ++i)
1898                 INIT_HLIST_HEAD(&priv->mac_hash[i]);
1899
1900         /* Query for default mac and max mtu */
1901         priv->max_mtu = mdev->dev->caps.eth_mtu_cap[priv->port];
1902
1903         /* Set default MAC */
1904         dev->addr_len = ETH_ALEN;
1905         mlx4_en_u64_to_mac(dev->dev_addr, mdev->dev->caps.def_mac[priv->port]);
1906         if (!is_valid_ether_addr(dev->dev_addr)) {
1907                 en_err(priv, "Port: %d, invalid mac burned: %pM, quiting\n",
1908                        priv->port, dev->dev_addr);
1909                 err = -EINVAL;
1910                 goto out;
1911         }
1912
1913         memcpy(priv->prev_mac, dev->dev_addr, sizeof(priv->prev_mac));
1914
1915         priv->stride = roundup_pow_of_two(sizeof(struct mlx4_en_rx_desc) +
1916                                           DS_SIZE * MLX4_EN_MAX_RX_FRAGS);
1917         err = mlx4_en_alloc_resources(priv);
1918         if (err)
1919                 goto out;
1920
1921 #ifdef CONFIG_RFS_ACCEL
1922         INIT_LIST_HEAD(&priv->filters);
1923         spin_lock_init(&priv->filters_lock);
1924 #endif
1925
1926         /* Allocate page for receive rings */
1927         err = mlx4_alloc_hwq_res(mdev->dev, &priv->res,
1928                                 MLX4_EN_PAGE_SIZE, MLX4_EN_PAGE_SIZE);
1929         if (err) {
1930                 en_err(priv, "Failed to allocate page for rx qps\n");
1931                 goto out;
1932         }
1933         priv->allocated = 1;
1934
1935         /*
1936          * Initialize netdev entry points
1937          */
1938         dev->netdev_ops = &mlx4_netdev_ops;
1939         dev->watchdog_timeo = MLX4_EN_WATCHDOG_TIMEOUT;
1940         netif_set_real_num_tx_queues(dev, priv->tx_ring_num);
1941         netif_set_real_num_rx_queues(dev, priv->rx_ring_num);
1942
1943         SET_ETHTOOL_OPS(dev, &mlx4_en_ethtool_ops);
1944
1945         /*
1946          * Set driver features
1947          */
1948         dev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1949         if (mdev->LSO_support)
1950                 dev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6;
1951
1952         dev->vlan_features = dev->hw_features;
1953
1954         dev->hw_features |= NETIF_F_RXCSUM | NETIF_F_RXHASH;
1955         dev->features = dev->hw_features | NETIF_F_HIGHDMA |
1956                         NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX |
1957                         NETIF_F_HW_VLAN_FILTER;
1958         dev->hw_features |= NETIF_F_LOOPBACK;
1959
1960         if (mdev->dev->caps.steering_mode ==
1961             MLX4_STEERING_MODE_DEVICE_MANAGED)
1962                 dev->hw_features |= NETIF_F_NTUPLE;
1963
1964         mdev->pndev[port] = dev;
1965
1966         netif_carrier_off(dev);
1967         err = register_netdev(dev);
1968         if (err) {
1969                 en_err(priv, "Netdev registration failed for port %d\n", port);
1970                 goto out;
1971         }
1972         priv->registered = 1;
1973
1974         en_warn(priv, "Using %d TX rings\n", prof->tx_ring_num);
1975         en_warn(priv, "Using %d RX rings\n", prof->rx_ring_num);
1976
1977         mlx4_en_update_loopback_state(priv->dev, priv->dev->features);
1978
1979         /* Configure port */
1980         mlx4_en_calc_rx_buf(dev);
1981         err = mlx4_SET_PORT_general(mdev->dev, priv->port,
1982                                     priv->rx_skb_size + ETH_FCS_LEN,
1983                                     prof->tx_pause, prof->tx_ppp,
1984                                     prof->rx_pause, prof->rx_ppp);
1985         if (err) {
1986                 en_err(priv, "Failed setting port general configurations "
1987                        "for port %d, with error %d\n", priv->port, err);
1988                 goto out;
1989         }
1990
1991         /* Init port */
1992         en_warn(priv, "Initializing port\n");
1993         err = mlx4_INIT_PORT(mdev->dev, priv->port);
1994         if (err) {
1995                 en_err(priv, "Failed Initializing port\n");
1996                 goto out;
1997         }
1998         mlx4_en_set_default_moderation(priv);
1999         queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);
2000         return 0;
2001
2002 out:
2003         mlx4_en_destroy_netdev(dev);
2004         return err;
2005 }
2006