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 mlx4_en_filter *filter;
 229         struct mlx4_en_filter *ret = NULL;
 230
 231         hlist_for_each_entry(filter,
 232                              filter_hash_bucket(priv, src_ip, dst_ip,
 233                                                 src_port, dst_port),
 234                              filter_chain) {
 235                 if (filter->src_ip == src_ip &&
 236                     filter->dst_ip == dst_ip &&
 237                     filter->src_port == src_port &&
 238                     filter->dst_port == dst_port) {
 239                         ret = filter;
 240                         break;
 241                 }
 242         }
 243
 244         return ret;
 245 }
 246
 247 static int
 248 mlx4_en_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb,
 249                    u16 rxq_index, u32 flow_id)
 250 {
 251         struct mlx4_en_priv *priv = netdev_priv(net_dev);
 252         struct mlx4_en_filter *filter;
 253         const struct iphdr *ip;
 254         const __be16 *ports;
 255         __be32 src_ip;
 256         __be32 dst_ip;
 257         __be16 src_port;
 258         __be16 dst_port;
 259         int nhoff = skb_network_offset(skb);
 260         int ret = 0;
 261
 262         if (skb->protocol != htons(ETH_P_IP))
 263                 return -EPROTONOSUPPORT;
 264
 265         ip = (const struct iphdr *)(skb->data + nhoff);
 266         if (ip_is_fragment(ip))
 267                 return -EPROTONOSUPPORT;
 268
 269         ports = (const __be16 *)(skb->data + nhoff + 4 * ip->ihl);
 270
 271         src_ip = ip->saddr;
 272         dst_ip = ip->daddr;
 273         src_port = ports[0];
 274         dst_port = ports[1];
 275
 276         if (ip->protocol != IPPROTO_TCP)
 277                 return -EPROTONOSUPPORT;
 278
 279         spin_lock_bh(&priv->filters_lock);
 280         filter = mlx4_en_filter_find(priv, src_ip, dst_ip, src_port, dst_port);
 281         if (filter) {
 282                 if (filter->rxq_index == rxq_index)
 283                         goto out;
 284
 285                 filter->rxq_index = rxq_index;
 286         } else {
 287                 filter = mlx4_en_filter_alloc(priv, rxq_index,
 288                                               src_ip, dst_ip,
 289                                               src_port, dst_port, flow_id);
 290                 if (!filter) {
 291                         ret = -ENOMEM;
 292                         goto err;
 293                 }
 294         }
 295
 296         queue_work(priv->mdev->workqueue, &filter->work);
 297
 298 out:
 299         ret = filter->id;
 300 err:
 301         spin_unlock_bh(&priv->filters_lock);
 302
 303         return ret;
 304 }
 305
 306 void mlx4_en_cleanup_filters(struct mlx4_en_priv *priv,
 307                              struct mlx4_en_rx_ring *rx_ring)
 308 {
 309         struct mlx4_en_filter *filter, *tmp;
 310         LIST_HEAD(del_list);
 311
 312         spin_lock_bh(&priv->filters_lock);
 313         list_for_each_entry_safe(filter, tmp, &priv->filters, next) {
 314                 list_move(&filter->next, &del_list);
 315                 hlist_del(&filter->filter_chain);
 316         }
 317         spin_unlock_bh(&priv->filters_lock);
 318
 319         list_for_each_entry_safe(filter, tmp, &del_list, next) {
 320                 cancel_work_sync(&filter->work);
 321                 mlx4_en_filter_free(filter);
 322         }
 323 }
 324
 325 static void mlx4_en_filter_rfs_expire(struct mlx4_en_priv *priv)
 326 {
 327         struct mlx4_en_filter *filter = NULL, *tmp, *last_filter = NULL;
 328         LIST_HEAD(del_list);
 329         int i = 0;
 330
 331         spin_lock_bh(&priv->filters_lock);
 332         list_for_each_entry_safe(filter, tmp, &priv->filters, next) {
 333                 if (i > MLX4_EN_FILTER_EXPIRY_QUOTA)
 334                         break;
 335
 336                 if (filter->activated &&
 337                     !work_pending(&filter->work) &&
 338                     rps_may_expire_flow(priv->dev,
 339                                         filter->rxq_index, filter->flow_id,
 340                                         filter->id)) {
 341                         list_move(&filter->next, &del_list);
 342                         hlist_del(&filter->filter_chain);
 343                 } else
 344                         last_filter = filter;
 345
 346                 i++;
 347         }
 348
 349         if (last_filter && (&last_filter->next != priv->filters.next))
 350                 list_move(&priv->filters, &last_filter->next);
 351
 352         spin_unlock_bh(&priv->filters_lock);
 353
 354         list_for_each_entry_safe(filter, tmp, &del_list, next)
 355                 mlx4_en_filter_free(filter);
 356 }
 357 #endif
 358
 359 static int mlx4_en_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
 360 {
 361         struct mlx4_en_priv *priv = netdev_priv(dev);
 362         struct mlx4_en_dev *mdev = priv->mdev;
 363         int err;
 364         int idx;
 365
 366         en_dbg(HW, priv, "adding VLAN:%d\n", vid);
 367
 368         set_bit(vid, priv->active_vlans);
 369
 370         /* Add VID to port VLAN filter */
 371         mutex_lock(&mdev->state_lock);
 372         if (mdev->device_up && priv->port_up) {
 373                 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv);
 374                 if (err)
 375                         en_err(priv, "Failed configuring VLAN filter\n");
 376         }
 377         if (mlx4_register_vlan(mdev->dev, priv->port, vid, &idx))
 378                 en_err(priv, "failed adding vlan %d\n", vid);
 379         mutex_unlock(&mdev->state_lock);
 380
 381         return 0;
 382 }
 383
 384 static int mlx4_en_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
 385 {
 386         struct mlx4_en_priv *priv = netdev_priv(dev);
 387         struct mlx4_en_dev *mdev = priv->mdev;
 388         int err;
 389         int idx;
 390
 391         en_dbg(HW, priv, "Killing VID:%d\n", vid);
 392
 393         clear_bit(vid, priv->active_vlans);
 394
 395         /* Remove VID from port VLAN filter */
 396         mutex_lock(&mdev->state_lock);
 397         if (!mlx4_find_cached_vlan(mdev->dev, priv->port, vid, &idx))
 398                 mlx4_unregister_vlan(mdev->dev, priv->port, idx);
 399         else
 400                 en_err(priv, "could not find vid %d in cache\n", vid);
 401
 402         if (mdev->device_up && priv->port_up) {
 403                 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv);
 404                 if (err)
 405                         en_err(priv, "Failed configuring VLAN filter\n");
 406         }
 407         mutex_unlock(&mdev->state_lock);
 408
 409         return 0;
 410 }
 411
 412 static void mlx4_en_u64_to_mac(unsigned char dst_mac[ETH_ALEN + 2], u64 src_mac)
 413 {
 414         unsigned int i;
 415         for (i = ETH_ALEN - 1; i; --i) {
 416                 dst_mac[i] = src_mac & 0xff;
 417                 src_mac >>= 8;
 418         }
 419         memset(&dst_mac[ETH_ALEN], 0, 2);
 420 }
 421
 422 static int mlx4_en_uc_steer_add(struct mlx4_en_priv *priv,
 423                                 unsigned char *mac, int *qpn, u64 *reg_id)
 424 {
 425         struct mlx4_en_dev *mdev = priv->mdev;
 426         struct mlx4_dev *dev = mdev->dev;
 427         int err;
 428
 429         switch (dev->caps.steering_mode) {
 430         case MLX4_STEERING_MODE_B0: {
 431                 struct mlx4_qp qp;
 432                 u8 gid[16] = {0};
 433
 434                 qp.qpn = *qpn;
 435                 memcpy(&gid[10], mac, ETH_ALEN);
 436                 gid[5] = priv->port;
 437
 438                 err = mlx4_unicast_attach(dev, &qp, gid, 0, MLX4_PROT_ETH);
 439                 break;
 440         }
 441         case MLX4_STEERING_MODE_DEVICE_MANAGED: {
 442                 struct mlx4_spec_list spec_eth = { {NULL} };
 443                 __be64 mac_mask = cpu_to_be64(MLX4_MAC_MASK << 16);
 444
 445                 struct mlx4_net_trans_rule rule = {
 446                         .queue_mode = MLX4_NET_TRANS_Q_FIFO,
 447                         .exclusive = 0,
 448                         .allow_loopback = 1,
 449                         .promisc_mode = MLX4_FS_PROMISC_NONE,
 450                         .priority = MLX4_DOMAIN_NIC,
 451                 };
 452
 453                 rule.port = priv->port;
 454                 rule.qpn = *qpn;
 455                 INIT_LIST_HEAD(&rule.list);
 456
 457                 spec_eth.id = MLX4_NET_TRANS_RULE_ID_ETH;
 458                 memcpy(spec_eth.eth.dst_mac, mac, ETH_ALEN);
 459                 memcpy(spec_eth.eth.dst_mac_msk, &mac_mask, ETH_ALEN);
 460                 list_add_tail(&spec_eth.list, &rule.list);
 461
 462                 err = mlx4_flow_attach(dev, &rule, reg_id);
 463                 break;
 464         }
 465         default:
 466                 return -EINVAL;
 467         }
 468         if (err)
 469                 en_warn(priv, "Failed Attaching Unicast\n");
 470
 471         return err;
 472 }
 473
 474 static void mlx4_en_uc_steer_release(struct mlx4_en_priv *priv,
 475                                      unsigned char *mac, int qpn, u64 reg_id)
 476 {
 477         struct mlx4_en_dev *mdev = priv->mdev;
 478         struct mlx4_dev *dev = mdev->dev;
 479
 480         switch (dev->caps.steering_mode) {
 481         case MLX4_STEERING_MODE_B0: {
 482                 struct mlx4_qp qp;
 483                 u8 gid[16] = {0};
 484
 485                 qp.qpn = qpn;
 486                 memcpy(&gid[10], mac, ETH_ALEN);
 487                 gid[5] = priv->port;
 488
 489                 mlx4_unicast_detach(dev, &qp, gid, MLX4_PROT_ETH);
 490                 break;
 491         }
 492         case MLX4_STEERING_MODE_DEVICE_MANAGED: {
 493                 mlx4_flow_detach(dev, reg_id);
 494                 break;
 495         }
 496         default:
 497                 en_err(priv, "Invalid steering mode.\n");
 498         }
 499 }
 500
 501 static int mlx4_en_get_qp(struct mlx4_en_priv *priv)
 502 {
 503         struct mlx4_en_dev *mdev = priv->mdev;
 504         struct mlx4_dev *dev = mdev->dev;
 505         struct mlx4_mac_entry *entry;
 506         int index = 0;
 507         int err = 0;
 508         u64 reg_id;
 509         int *qpn = &priv->base_qpn;
 510         u64 mac = mlx4_en_mac_to_u64(priv->dev->dev_addr);
 511
 512         en_dbg(DRV, priv, "Registering MAC: %pM for adding\n",
 513                priv->dev->dev_addr);
 514         index = mlx4_register_mac(dev, priv->port, mac);
 515         if (index < 0) {
 516                 err = index;
 517                 en_err(priv, "Failed adding MAC: %pM\n",
 518                        priv->dev->dev_addr);
 519                 return err;
 520         }
 521
 522         if (dev->caps.steering_mode == MLX4_STEERING_MODE_A0) {
 523                 int base_qpn = mlx4_get_base_qpn(dev, priv->port);
 524                 *qpn = base_qpn + index;
 525                 return 0;
 526         }
 527
 528         err = mlx4_qp_reserve_range(dev, 1, 1, qpn);
 529         en_dbg(DRV, priv, "Reserved qp %d\n", *qpn);
 530         if (err) {
 531                 en_err(priv, "Failed to reserve qp for mac registration\n");
 532                 goto qp_err;
 533         }
 534
 535         err = mlx4_en_uc_steer_add(priv, priv->dev->dev_addr, qpn, &reg_id);
 536         if (err)
 537                 goto steer_err;
 538
 539         entry = kmalloc(sizeof(*entry), GFP_KERNEL);
 540         if (!entry) {
 541                 err = -ENOMEM;
 542                 goto alloc_err;
 543         }
 544         memcpy(entry->mac, priv->dev->dev_addr, sizeof(entry->mac));
 545         entry->reg_id = reg_id;
 546
 547         hlist_add_head_rcu(&entry->hlist,
 548                            &priv->mac_hash[entry->mac[MLX4_EN_MAC_HASH_IDX]]);
 549
 550         return 0;
 551
 552 alloc_err:
 553         mlx4_en_uc_steer_release(priv, priv->dev->dev_addr, *qpn, reg_id);
 554
 555 steer_err:
 556         mlx4_qp_release_range(dev, *qpn, 1);
 557
 558 qp_err:
 559         mlx4_unregister_mac(dev, priv->port, mac);
 560         return err;
 561 }
 562
 563 static void mlx4_en_put_qp(struct mlx4_en_priv *priv)
 564 {
 565         struct mlx4_en_dev *mdev = priv->mdev;
 566         struct mlx4_dev *dev = mdev->dev;
 567         int qpn = priv->base_qpn;
 568         u64 mac;
 569
 570         if (dev->caps.steering_mode == MLX4_STEERING_MODE_A0) {
 571                 mac = mlx4_en_mac_to_u64(priv->dev->dev_addr);
 572                 en_dbg(DRV, priv, "Registering MAC: %pM for deleting\n",
 573                        priv->dev->dev_addr);
 574                 mlx4_unregister_mac(dev, priv->port, mac);
 575         } else {
 576                 struct mlx4_mac_entry *entry;
 577                 struct hlist_node *tmp;
 578                 struct hlist_head *bucket;
 579                 unsigned int i;
 580
 581                 for (i = 0; i < MLX4_EN_MAC_HASH_SIZE; ++i) {
 582                         bucket = &priv->mac_hash[i];
 583                         hlist_for_each_entry_safe(entry, tmp, bucket, hlist) {
 584                                 mac = mlx4_en_mac_to_u64(entry->mac);
 585                                 en_dbg(DRV, priv, "Registering MAC: %pM for deleting\n",
 586                                        entry->mac);
 587                                 mlx4_en_uc_steer_release(priv, entry->mac,
 588                                                          qpn, entry->reg_id);
 589
 590                                 mlx4_unregister_mac(dev, priv->port, mac);
 591                                 hlist_del_rcu(&entry->hlist);
 592                                 kfree_rcu(entry, rcu);
 593                         }
 594                 }
 595
 596                 en_dbg(DRV, priv, "Releasing qp: port %d, qpn %d\n",
 597                        priv->port, qpn);
 598                 mlx4_qp_release_range(dev, qpn, 1);
 599                 priv->flags &= ~MLX4_EN_FLAG_FORCE_PROMISC;
 600         }
 601 }
 602
 603 static int mlx4_en_replace_mac(struct mlx4_en_priv *priv, int qpn,
 604                                unsigned char *new_mac, unsigned char *prev_mac)
 605 {
 606         struct mlx4_en_dev *mdev = priv->mdev;
 607         struct mlx4_dev *dev = mdev->dev;
 608         int err = 0;
 609         u64 new_mac_u64 = mlx4_en_mac_to_u64(new_mac);
 610
 611         if (dev->caps.steering_mode != MLX4_STEERING_MODE_A0) {
 612                 struct hlist_head *bucket;
 613                 unsigned int mac_hash;
 614                 struct mlx4_mac_entry *entry;
 615                 struct hlist_node *tmp;
 616                 u64 prev_mac_u64 = mlx4_en_mac_to_u64(prev_mac);
 617
 618                 bucket = &priv->mac_hash[prev_mac[MLX4_EN_MAC_HASH_IDX]];
 619                 hlist_for_each_entry_safe(entry, tmp, bucket, hlist) {
 620                         if (ether_addr_equal_64bits(entry->mac, prev_mac)) {
 621                                 mlx4_en_uc_steer_release(priv, entry->mac,
 622                                                          qpn, entry->reg_id);
 623                                 mlx4_unregister_mac(dev, priv->port,
 624                                                     prev_mac_u64);
 625                                 hlist_del_rcu(&entry->hlist);
 626                                 synchronize_rcu();
 627                                 memcpy(entry->mac, new_mac, ETH_ALEN);
 628                                 entry->reg_id = 0;
 629                                 mac_hash = new_mac[MLX4_EN_MAC_HASH_IDX];
 630                                 hlist_add_head_rcu(&entry->hlist,
 631                                                    &priv->mac_hash[mac_hash]);
 632                                 mlx4_register_mac(dev, priv->port, new_mac_u64);
 633                                 err = mlx4_en_uc_steer_add(priv, new_mac,
 634                                                            &qpn,
 635                                                            &entry->reg_id);
 636                                 return err;
 637                         }
 638                 }
 639                 return -EINVAL;
 640         }
 641
 642         return __mlx4_replace_mac(dev, priv->port, qpn, new_mac_u64);
 643 }
 644
 645 u64 mlx4_en_mac_to_u64(u8 *addr)
 646 {
 647         u64 mac = 0;
 648         int i;
 649
 650         for (i = 0; i < ETH_ALEN; i++) {
 651                 mac <<= 8;
 652                 mac |= addr[i];
 653         }
 654         return mac;
 655 }
 656
 657 static int mlx4_en_do_set_mac(struct mlx4_en_priv *priv)
 658 {
 659         int err = 0;
 660
 661         if (priv->port_up) {
 662                 /* Remove old MAC and insert the new one */
 663                 err = mlx4_en_replace_mac(priv, priv->base_qpn,
 664                                           priv->dev->dev_addr, priv->prev_mac);
 665                 if (err)
 666                         en_err(priv, "Failed changing HW MAC address\n");
 667                 memcpy(priv->prev_mac, priv->dev->dev_addr,
 668                        sizeof(priv->prev_mac));
 669         } else
 670                 en_dbg(HW, priv, "Port is down while registering mac, exiting...\n");
 671
 672         return err;
 673 }
 674
 675 static int mlx4_en_set_mac(struct net_device *dev, void *addr)
 676 {
 677         struct mlx4_en_priv *priv = netdev_priv(dev);
 678         struct mlx4_en_dev *mdev = priv->mdev;
 679         struct sockaddr *saddr = addr;
 680         int err;
 681
 682         if (!is_valid_ether_addr(saddr->sa_data))
 683                 return -EADDRNOTAVAIL;
 684
 685         memcpy(dev->dev_addr, saddr->sa_data, ETH_ALEN);
 686
 687         mutex_lock(&mdev->state_lock);
 688         err = mlx4_en_do_set_mac(priv);
 689         mutex_unlock(&mdev->state_lock);
 690
 691         return err;
 692 }
 693
 694 static void mlx4_en_clear_list(struct net_device *dev)
 695 {
 696         struct mlx4_en_priv *priv = netdev_priv(dev);
 697         struct mlx4_en_mc_list *tmp, *mc_to_del;
 698
 699         list_for_each_entry_safe(mc_to_del, tmp, &priv->mc_list, list) {
 700                 list_del(&mc_to_del->list);
 701                 kfree(mc_to_del);
 702         }
 703 }
 704
 705 static void mlx4_en_cache_mclist(struct net_device *dev)
 706 {
 707         struct mlx4_en_priv *priv = netdev_priv(dev);
 708         struct netdev_hw_addr *ha;
 709         struct mlx4_en_mc_list *tmp;
 710
 711         mlx4_en_clear_list(dev);
 712         netdev_for_each_mc_addr(ha, dev) {
 713                 tmp = kzalloc(sizeof(struct mlx4_en_mc_list), GFP_ATOMIC);
 714                 if (!tmp) {
 715                         mlx4_en_clear_list(dev);
 716                         return;
 717                 }
 718                 memcpy(tmp->addr, ha->addr, ETH_ALEN);
 719                 list_add_tail(&tmp->list, &priv->mc_list);
 720         }
 721 }
 722
 723 static void update_mclist_flags(struct mlx4_en_priv *priv,
 724                                 struct list_head *dst,
 725                                 struct list_head *src)
 726 {
 727         struct mlx4_en_mc_list *dst_tmp, *src_tmp, *new_mc;
 728         bool found;
 729
 730         /* Find all the entries that should be removed from dst,
 731          * These are the entries that are not found in src
 732          */
 733         list_for_each_entry(dst_tmp, dst, list) {
 734                 found = false;
 735                 list_for_each_entry(src_tmp, src, list) {
 736                         if (!memcmp(dst_tmp->addr, src_tmp->addr, ETH_ALEN)) {
 737                                 found = true;
 738                                 break;
 739                         }
 740                 }
 741                 if (!found)
 742                         dst_tmp->action = MCLIST_REM;
 743         }
 744
 745         /* Add entries that exist in src but not in dst
 746          * mark them as need to add
 747          */
 748         list_for_each_entry(src_tmp, src, list) {
 749                 found = false;
 750                 list_for_each_entry(dst_tmp, dst, list) {
 751                         if (!memcmp(dst_tmp->addr, src_tmp->addr, ETH_ALEN)) {
 752                                 dst_tmp->action = MCLIST_NONE;
 753                                 found = true;
 754                                 break;
 755                         }
 756                 }
 757                 if (!found) {
 758                         new_mc = kmemdup(src_tmp,
 759                                          sizeof(struct mlx4_en_mc_list),
 760                                          GFP_KERNEL);
 761                         if (!new_mc)
 762                                 return;
 763
 764                         new_mc->action = MCLIST_ADD;
 765                         list_add_tail(&new_mc->list, dst);
 766                 }
 767         }
 768 }
 769
 770 static void mlx4_en_set_rx_mode(struct net_device *dev)
 771 {
 772         struct mlx4_en_priv *priv = netdev_priv(dev);
 773
 774         if (!priv->port_up)
 775                 return;
 776
 777         queue_work(priv->mdev->workqueue, &priv->rx_mode_task);
 778 }
 779
 780 static void mlx4_en_set_promisc_mode(struct mlx4_en_priv *priv,
 781                                      struct mlx4_en_dev *mdev)
 782 {
 783         int err = 0;
 784
 785         if (!(priv->flags & MLX4_EN_FLAG_PROMISC)) {
 786                 if (netif_msg_rx_status(priv))
 787                         en_warn(priv, "Entering promiscuous mode\n");
 788                 priv->flags |= MLX4_EN_FLAG_PROMISC;
 789
 790                 /* Enable promiscouos mode */
 791                 switch (mdev->dev->caps.steering_mode) {
 792                 case MLX4_STEERING_MODE_DEVICE_MANAGED:
 793                         err = mlx4_flow_steer_promisc_add(mdev->dev,
 794                                                           priv->port,
 795                                                           priv->base_qpn,
 796                                                           MLX4_FS_PROMISC_UPLINK);
 797                         if (err)
 798                                 en_err(priv, "Failed enabling promiscuous mode\n");
 799                         priv->flags |= MLX4_EN_FLAG_MC_PROMISC;
 800                         break;
 801
 802                 case MLX4_STEERING_MODE_B0:
 803                         err = mlx4_unicast_promisc_add(mdev->dev,
 804                                                        priv->base_qpn,
 805                                                        priv->port);
 806                         if (err)
 807                                 en_err(priv, "Failed enabling unicast promiscuous mode\n");
 808
 809                         /* Add the default qp number as multicast
 810                          * promisc
 811                          */
 812                         if (!(priv->flags & MLX4_EN_FLAG_MC_PROMISC)) {
 813                                 err = mlx4_multicast_promisc_add(mdev->dev,
 814                                                                  priv->base_qpn,
 815                                                                  priv->port);
 816                                 if (err)
 817                                         en_err(priv, "Failed enabling multicast promiscuous mode\n");
 818                                 priv->flags |= MLX4_EN_FLAG_MC_PROMISC;
 819                         }
 820                         break;
 821
 822                 case MLX4_STEERING_MODE_A0:
 823                         err = mlx4_SET_PORT_qpn_calc(mdev->dev,
 824                                                      priv->port,
 825                                                      priv->base_qpn,
 826                                                      1);
 827                         if (err)
 828                                 en_err(priv, "Failed enabling promiscuous mode\n");
 829                         break;
 830                 }
 831
 832                 /* Disable port multicast filter (unconditionally) */
 833                 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
 834                                           0, MLX4_MCAST_DISABLE);
 835                 if (err)
 836                         en_err(priv, "Failed disabling multicast filter\n");
 837
 838                 /* Disable port VLAN filter */
 839                 err = mlx4_SET_VLAN_FLTR(mdev->dev, priv);
 840                 if (err)
 841                         en_err(priv, "Failed disabling VLAN filter\n");
 842         }
 843 }
 844
 845 static void mlx4_en_clear_promisc_mode(struct mlx4_en_priv *priv,
 846                                        struct mlx4_en_dev *mdev)
 847 {
 848         int err = 0;
 849
 850         if (netif_msg_rx_status(priv))
 851                 en_warn(priv, "Leaving promiscuous mode\n");
 852         priv->flags &= ~MLX4_EN_FLAG_PROMISC;
 853
 854         /* Disable promiscouos mode */
 855         switch (mdev->dev->caps.steering_mode) {
 856         case MLX4_STEERING_MODE_DEVICE_MANAGED:
 857                 err = mlx4_flow_steer_promisc_remove(mdev->dev,
 858                                                      priv->port,
 859                                                      MLX4_FS_PROMISC_UPLINK);
 860                 if (err)
 861                         en_err(priv, "Failed disabling promiscuous mode\n");
 862                 priv->flags &= ~MLX4_EN_FLAG_MC_PROMISC;
 863                 break;
 864
 865         case MLX4_STEERING_MODE_B0:
 866                 err = mlx4_unicast_promisc_remove(mdev->dev,
 867                                                   priv->base_qpn,
 868                                                   priv->port);
 869                 if (err)
 870                         en_err(priv, "Failed disabling unicast promiscuous mode\n");
 871                 /* Disable Multicast promisc */
 872                 if (priv->flags & MLX4_EN_FLAG_MC_PROMISC) {
 873                         err = mlx4_multicast_promisc_remove(mdev->dev,
 874                                                             priv->base_qpn,
 875                                                             priv->port);
 876                         if (err)
 877                                 en_err(priv, "Failed disabling multicast promiscuous mode\n");
 878                         priv->flags &= ~MLX4_EN_FLAG_MC_PROMISC;
 879                 }
 880                 break;
 881
 882         case MLX4_STEERING_MODE_A0:
 883                 err = mlx4_SET_PORT_qpn_calc(mdev->dev,
 884                                              priv->port,
 885                                              priv->base_qpn, 0);
 886                 if (err)
 887                         en_err(priv, "Failed disabling promiscuous mode\n");
 888                 break;
 889         }
 890
 891         /* Enable port VLAN filter */
 892         err = mlx4_SET_VLAN_FLTR(mdev->dev, priv);
 893         if (err)
 894                 en_err(priv, "Failed enabling VLAN filter\n");
 895 }
 896
 897 static void mlx4_en_do_multicast(struct mlx4_en_priv *priv,
 898                                  struct net_device *dev,
 899                                  struct mlx4_en_dev *mdev)
 900 {
 901         struct mlx4_en_mc_list *mclist, *tmp;
 902         u64 mcast_addr = 0;
 903         u8 mc_list[16] = {0};
 904         int err = 0;
 905
 906         /* Enable/disable the multicast filter according to IFF_ALLMULTI */
 907         if (dev->flags & IFF_ALLMULTI) {
 908                 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
 909                                           0, MLX4_MCAST_DISABLE);
 910                 if (err)
 911                         en_err(priv, "Failed disabling multicast filter\n");
 912
 913                 /* Add the default qp number as multicast promisc */
 914                 if (!(priv->flags & MLX4_EN_FLAG_MC_PROMISC)) {
 915                         switch (mdev->dev->caps.steering_mode) {
 916                         case MLX4_STEERING_MODE_DEVICE_MANAGED:
 917                                 err = mlx4_flow_steer_promisc_add(mdev->dev,
 918                                                                   priv->port,
 919                                                                   priv->base_qpn,
 920                                                                   MLX4_FS_PROMISC_ALL_MULTI);
 921                                 break;
 922
 923                         case MLX4_STEERING_MODE_B0:
 924                                 err = mlx4_multicast_promisc_add(mdev->dev,
 925                                                                  priv->base_qpn,
 926                                                                  priv->port);
 927                                 break;
 928
 929                         case MLX4_STEERING_MODE_A0:
 930                                 break;
 931                         }
 932                         if (err)
 933                                 en_err(priv, "Failed entering multicast promisc mode\n");
 934                         priv->flags |= MLX4_EN_FLAG_MC_PROMISC;
 935                 }
 936         } else {
 937                 /* Disable Multicast promisc */
 938                 if (priv->flags & MLX4_EN_FLAG_MC_PROMISC) {
 939                         switch (mdev->dev->caps.steering_mode) {
 940                         case MLX4_STEERING_MODE_DEVICE_MANAGED:
 941                                 err = mlx4_flow_steer_promisc_remove(mdev->dev,
 942                                                                      priv->port,
 943                                                                      MLX4_FS_PROMISC_ALL_MULTI);
 944                                 break;
 945
 946                         case MLX4_STEERING_MODE_B0:
 947                                 err = mlx4_multicast_promisc_remove(mdev->dev,
 948                                                                     priv->base_qpn,
 949                                                                     priv->port);
 950                                 break;
 951
 952                         case MLX4_STEERING_MODE_A0:
 953                                 break;
 954                         }
 955                         if (err)
 956                                 en_err(priv, "Failed disabling multicast promiscuous mode\n");
 957                         priv->flags &= ~MLX4_EN_FLAG_MC_PROMISC;
 958                 }
 959
 960                 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
 961                                           0, MLX4_MCAST_DISABLE);
 962                 if (err)
 963                         en_err(priv, "Failed disabling multicast filter\n");
 964
 965                 /* Flush mcast filter and init it with broadcast address */
 966                 mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, ETH_BCAST,
 967                                     1, MLX4_MCAST_CONFIG);
 968
 969                 /* Update multicast list - we cache all addresses so they won't
 970                  * change while HW is updated holding the command semaphor */
 971                 netif_addr_lock_bh(dev);
 972                 mlx4_en_cache_mclist(dev);
 973                 netif_addr_unlock_bh(dev);
 974                 list_for_each_entry(mclist, &priv->mc_list, list) {
 975                         mcast_addr = mlx4_en_mac_to_u64(mclist->addr);
 976                         mlx4_SET_MCAST_FLTR(mdev->dev, priv->port,
 977                                             mcast_addr, 0, MLX4_MCAST_CONFIG);
 978                 }
 979                 err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
 980                                           0, MLX4_MCAST_ENABLE);
 981                 if (err)
 982                         en_err(priv, "Failed enabling multicast filter\n");
 983
 984                 update_mclist_flags(priv, &priv->curr_list, &priv->mc_list);
 985                 list_for_each_entry_safe(mclist, tmp, &priv->curr_list, list) {
 986                         if (mclist->action == MCLIST_REM) {
 987                                 /* detach this address and delete from list */
 988                                 memcpy(&mc_list[10], mclist->addr, ETH_ALEN);
 989                                 mc_list[5] = priv->port;
 990                                 err = mlx4_multicast_detach(mdev->dev,
 991                                                             &priv->rss_map.indir_qp,
 992                                                             mc_list,
 993                                                             MLX4_PROT_ETH,
 994                                                             mclist->reg_id);
 995                                 if (err)
 996                                         en_err(priv, "Fail to detach multicast address\n");
 997
 998                                 /* remove from list */
 999                                 list_del(&mclist->list);
1000                                 kfree(mclist);
1001                         } else if (mclist->action == MCLIST_ADD) {
1002                                 /* attach the address */
1003                                 memcpy(&mc_list[10], mclist->addr, ETH_ALEN);
1004                                 /* needed for B0 steering support */
1005                                 mc_list[5] = priv->port;
1006                                 err = mlx4_multicast_attach(mdev->dev,
1007                                                             &priv->rss_map.indir_qp,
1008                                                             mc_list,
1009                                                             priv->port, 0,
1010                                                             MLX4_PROT_ETH,
1011                                                             &mclist->reg_id);
1012                                 if (err)
1013                                         en_err(priv, "Fail to attach multicast address\n");
1014
1015                         }
1016                 }
1017         }
1018 }
1019
1020 static void mlx4_en_do_uc_filter(struct mlx4_en_priv *priv,
1021                                  struct net_device *dev,
1022                                  struct mlx4_en_dev *mdev)
1023 {
1024         struct netdev_hw_addr *ha;
1025         struct mlx4_mac_entry *entry;
1026         struct hlist_node *tmp;
1027         bool found;
1028         u64 mac;
1029         int err = 0;
1030         struct hlist_head *bucket;
1031         unsigned int i;
1032         int removed = 0;
1033         u32 prev_flags;
1034
1035         /* Note that we do not need to protect our mac_hash traversal with rcu,
1036          * since all modification code is protected by mdev->state_lock
1037          */
1038
1039         /* find what to remove */
1040         for (i = 0; i < MLX4_EN_MAC_HASH_SIZE; ++i) {
1041                 bucket = &priv->mac_hash[i];
1042                 hlist_for_each_entry_safe(entry, tmp, bucket, hlist) {
1043                         found = false;
1044                         netdev_for_each_uc_addr(ha, dev) {
1045                                 if (ether_addr_equal_64bits(entry->mac,
1046                                                             ha->addr)) {
1047                                         found = true;
1048                                         break;
1049                                 }
1050                         }
1051
1052                         /* MAC address of the port is not in uc list */
1053                         if (ether_addr_equal_64bits(entry->mac, dev->dev_addr))
1054                                 found = true;
1055
1056                         if (!found) {
1057                                 mac = mlx4_en_mac_to_u64(entry->mac);
1058                                 mlx4_en_uc_steer_release(priv, entry->mac,
1059                                                          priv->base_qpn,
1060                                                          entry->reg_id);
1061                                 mlx4_unregister_mac(mdev->dev, priv->port, mac);
1062
1063                                 hlist_del_rcu(&entry->hlist);
1064                                 kfree_rcu(entry, rcu);
1065                                 en_dbg(DRV, priv, "Removed MAC %pM on port:%d\n",
1066                                        entry->mac, priv->port);
1067                                 ++removed;
1068                         }
1069                 }
1070         }
1071
1072         /* if we didn't remove anything, there is no use in trying to add
1073          * again once we are in a forced promisc mode state
1074          */
1075         if ((priv->flags & MLX4_EN_FLAG_FORCE_PROMISC) && 0 == removed)
1076                 return;
1077
1078         prev_flags = priv->flags;
1079         priv->flags &= ~MLX4_EN_FLAG_FORCE_PROMISC;
1080
1081         /* find what to add */
1082         netdev_for_each_uc_addr(ha, dev) {
1083                 found = false;
1084                 bucket = &priv->mac_hash[ha->addr[MLX4_EN_MAC_HASH_IDX]];
1085                 hlist_for_each_entry(entry, bucket, hlist) {
1086                         if (ether_addr_equal_64bits(entry->mac, ha->addr)) {
1087                                 found = true;
1088                                 break;
1089                         }
1090                 }
1091
1092                 if (!found) {
1093                         entry = kmalloc(sizeof(*entry), GFP_KERNEL);
1094                         if (!entry) {
1095                                 en_err(priv, "Failed adding MAC %pM on port:%d (out of memory)\n",
1096                                        ha->addr, priv->port);
1097                                 priv->flags |= MLX4_EN_FLAG_FORCE_PROMISC;
1098                                 break;
1099                         }
1100                         mac = mlx4_en_mac_to_u64(ha->addr);
1101                         memcpy(entry->mac, ha->addr, ETH_ALEN);
1102                         err = mlx4_register_mac(mdev->dev, priv->port, mac);
1103                         if (err < 0) {
1104                                 en_err(priv, "Failed registering MAC %pM on port %d: %d\n",
1105                                        ha->addr, priv->port, err);
1106                                 kfree(entry);
1107                                 priv->flags |= MLX4_EN_FLAG_FORCE_PROMISC;
1108                                 break;
1109                         }
1110                         err = mlx4_en_uc_steer_add(priv, ha->addr,
1111                                                    &priv->base_qpn,
1112                                                    &entry->reg_id);
1113                         if (err) {
1114                                 en_err(priv, "Failed adding MAC %pM on port %d: %d\n",
1115                                        ha->addr, priv->port, err);
1116                                 mlx4_unregister_mac(mdev->dev, priv->port, mac);
1117                                 kfree(entry);
1118                                 priv->flags |= MLX4_EN_FLAG_FORCE_PROMISC;
1119                                 break;
1120                         } else {
1121                                 unsigned int mac_hash;
1122                                 en_dbg(DRV, priv, "Added MAC %pM on port:%d\n",
1123                                        ha->addr, priv->port);
1124                                 mac_hash = ha->addr[MLX4_EN_MAC_HASH_IDX];
1125                                 bucket = &priv->mac_hash[mac_hash];
1126                                 hlist_add_head_rcu(&entry->hlist, bucket);
1127                         }
1128                 }
1129         }
1130
1131         if (priv->flags & MLX4_EN_FLAG_FORCE_PROMISC) {
1132                 en_warn(priv, "Forcing promiscuous mode on port:%d\n",
1133                         priv->port);
1134         } else if (prev_flags & MLX4_EN_FLAG_FORCE_PROMISC) {
1135                 en_warn(priv, "Stop forcing promiscuous mode on port:%d\n",
1136                         priv->port);
1137         }
1138 }
1139
1140 static void mlx4_en_do_set_rx_mode(struct work_struct *work)
1141 {
1142         struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
1143                                                  rx_mode_task);
1144         struct mlx4_en_dev *mdev = priv->mdev;
1145         struct net_device *dev = priv->dev;
1146
1147         mutex_lock(&mdev->state_lock);
1148         if (!mdev->device_up) {
1149                 en_dbg(HW, priv, "Card is not up, ignoring rx mode change.\n");
1150                 goto out;
1151         }
1152         if (!priv->port_up) {
1153                 en_dbg(HW, priv, "Port is down, ignoring rx mode change.\n");
1154                 goto out;
1155         }
1156
1157         if (!netif_carrier_ok(dev)) {
1158                 if (!mlx4_en_QUERY_PORT(mdev, priv->port)) {
1159                         if (priv->port_state.link_state) {
1160                                 priv->last_link_state = MLX4_DEV_EVENT_PORT_UP;
1161                                 netif_carrier_on(dev);
1162                                 en_dbg(LINK, priv, "Link Up\n");
1163                         }
1164                 }
1165         }
1166
1167         if (dev->priv_flags & IFF_UNICAST_FLT)
1168                 mlx4_en_do_uc_filter(priv, dev, mdev);
1169
1170         /* Promsicuous mode: disable all filters */
1171         if ((dev->flags & IFF_PROMISC) ||
1172             (priv->flags & MLX4_EN_FLAG_FORCE_PROMISC)) {
1173                 mlx4_en_set_promisc_mode(priv, mdev);
1174                 goto out;
1175         }
1176
1177         /* Not in promiscuous mode */
1178         if (priv->flags & MLX4_EN_FLAG_PROMISC)
1179                 mlx4_en_clear_promisc_mode(priv, mdev);
1180
1181         mlx4_en_do_multicast(priv, dev, mdev);
1182 out:
1183         mutex_unlock(&mdev->state_lock);
1184 }
1185
1186 #ifdef CONFIG_NET_POLL_CONTROLLER
1187 static void mlx4_en_netpoll(struct net_device *dev)
1188 {
1189         struct mlx4_en_priv *priv = netdev_priv(dev);
1190         struct mlx4_en_cq *cq;
1191         unsigned long flags;
1192         int i;
1193
1194         for (i = 0; i < priv->rx_ring_num; i++) {
1195                 cq = &priv->rx_cq[i];
1196                 spin_lock_irqsave(&cq->lock, flags);
1197                 napi_synchronize(&cq->napi);
1198                 mlx4_en_process_rx_cq(dev, cq, 0);
1199                 spin_unlock_irqrestore(&cq->lock, flags);
1200         }
1201 }
1202 #endif
1203
1204 static void mlx4_en_tx_timeout(struct net_device *dev)
1205 {
1206         struct mlx4_en_priv *priv = netdev_priv(dev);
1207         struct mlx4_en_dev *mdev = priv->mdev;
1208
1209         if (netif_msg_timer(priv))
1210                 en_warn(priv, "Tx timeout called on port:%d\n", priv->port);
1211
1212         priv->port_stats.tx_timeout++;
1213         en_dbg(DRV, priv, "Scheduling watchdog\n");
1214         queue_work(mdev->workqueue, &priv->watchdog_task);
1215 }
1216
1217
1218 static struct net_device_stats *mlx4_en_get_stats(struct net_device *dev)
1219 {
1220         struct mlx4_en_priv *priv = netdev_priv(dev);
1221
1222         spin_lock_bh(&priv->stats_lock);
1223         memcpy(&priv->ret_stats, &priv->stats, sizeof(priv->stats));
1224         spin_unlock_bh(&priv->stats_lock);
1225
1226         return &priv->ret_stats;
1227 }
1228
1229 static void mlx4_en_set_default_moderation(struct mlx4_en_priv *priv)
1230 {
1231         struct mlx4_en_cq *cq;
1232         int i;
1233
1234         /* If we haven't received a specific coalescing setting
1235          * (module param), we set the moderation parameters as follows:
1236          * - moder_cnt is set to the number of mtu sized packets to
1237          *   satisfy our coalescing target.
1238          * - moder_time is set to a fixed value.
1239          */
1240         priv->rx_frames = MLX4_EN_RX_COAL_TARGET;
1241         priv->rx_usecs = MLX4_EN_RX_COAL_TIME;
1242         priv->tx_frames = MLX4_EN_TX_COAL_PKTS;
1243         priv->tx_usecs = MLX4_EN_TX_COAL_TIME;
1244         en_dbg(INTR, priv, "Default coalesing params for mtu:%d - rx_frames:%d rx_usecs:%d\n",
1245                priv->dev->mtu, priv->rx_frames, priv->rx_usecs);
1246
1247         /* Setup cq moderation params */
1248         for (i = 0; i < priv->rx_ring_num; i++) {
1249                 cq = &priv->rx_cq[i];
1250                 cq->moder_cnt = priv->rx_frames;
1251                 cq->moder_time = priv->rx_usecs;
1252                 priv->last_moder_time[i] = MLX4_EN_AUTO_CONF;
1253                 priv->last_moder_packets[i] = 0;
1254                 priv->last_moder_bytes[i] = 0;
1255         }
1256
1257         for (i = 0; i < priv->tx_ring_num; i++) {
1258                 cq = &priv->tx_cq[i];
1259                 cq->moder_cnt = priv->tx_frames;
1260                 cq->moder_time = priv->tx_usecs;
1261         }
1262
1263         /* Reset auto-moderation params */
1264         priv->pkt_rate_low = MLX4_EN_RX_RATE_LOW;
1265         priv->rx_usecs_low = MLX4_EN_RX_COAL_TIME_LOW;
1266         priv->pkt_rate_high = MLX4_EN_RX_RATE_HIGH;
1267         priv->rx_usecs_high = MLX4_EN_RX_COAL_TIME_HIGH;
1268         priv->sample_interval = MLX4_EN_SAMPLE_INTERVAL;
1269         priv->adaptive_rx_coal = 1;
1270         priv->last_moder_jiffies = 0;
1271         priv->last_moder_tx_packets = 0;
1272 }
1273
1274 static void mlx4_en_auto_moderation(struct mlx4_en_priv *priv)
1275 {
1276         unsigned long period = (unsigned long) (jiffies - priv->last_moder_jiffies);
1277         struct mlx4_en_cq *cq;
1278         unsigned long packets;
1279         unsigned long rate;
1280         unsigned long avg_pkt_size;
1281         unsigned long rx_packets;
1282         unsigned long rx_bytes;
1283         unsigned long rx_pkt_diff;
1284         int moder_time;
1285         int ring, err;
1286
1287         if (!priv->adaptive_rx_coal || period < priv->sample_interval * HZ)
1288                 return;
1289
1290         for (ring = 0; ring < priv->rx_ring_num; ring++) {
1291                 spin_lock_bh(&priv->stats_lock);
1292                 rx_packets = priv->rx_ring[ring].packets;
1293                 rx_bytes = priv->rx_ring[ring].bytes;
1294                 spin_unlock_bh(&priv->stats_lock);
1295
1296                 rx_pkt_diff = ((unsigned long) (rx_packets -
1297                                 priv->last_moder_packets[ring]));
1298                 packets = rx_pkt_diff;
1299                 rate = packets * HZ / period;
1300                 avg_pkt_size = packets ? ((unsigned long) (rx_bytes -
1301                                 priv->last_moder_bytes[ring])) / packets : 0;
1302
1303                 /* Apply auto-moderation only when packet rate
1304                  * exceeds a rate that it matters */
1305                 if (rate > (MLX4_EN_RX_RATE_THRESH / priv->rx_ring_num) &&
1306                     avg_pkt_size > MLX4_EN_AVG_PKT_SMALL) {
1307                         if (rate < priv->pkt_rate_low)
1308                                 moder_time = priv->rx_usecs_low;
1309                         else if (rate > priv->pkt_rate_high)
1310                                 moder_time = priv->rx_usecs_high;
1311                         else
1312                                 moder_time = (rate - priv->pkt_rate_low) *
1313                                         (priv->rx_usecs_high - priv->rx_usecs_low) /
1314                                         (priv->pkt_rate_high - priv->pkt_rate_low) +
1315                                         priv->rx_usecs_low;
1316                 } else {
1317                         moder_time = priv->rx_usecs_low;
1318                 }
1319
1320                 if (moder_time != priv->last_moder_time[ring]) {
1321                         priv->last_moder_time[ring] = moder_time;
1322                         cq = &priv->rx_cq[ring];
1323                         cq->moder_time = moder_time;
1324                         err = mlx4_en_set_cq_moder(priv, cq);
1325                         if (err)
1326                                 en_err(priv, "Failed modifying moderation for cq:%d\n",
1327                                        ring);
1328                 }
1329                 priv->last_moder_packets[ring] = rx_packets;
1330                 priv->last_moder_bytes[ring] = rx_bytes;
1331         }
1332
1333         priv->last_moder_jiffies = jiffies;
1334 }
1335
1336 static void mlx4_en_do_get_stats(struct work_struct *work)
1337 {
1338         struct delayed_work *delay = to_delayed_work(work);
1339         struct mlx4_en_priv *priv = container_of(delay, struct mlx4_en_priv,
1340                                                  stats_task);
1341         struct mlx4_en_dev *mdev = priv->mdev;
1342         int err;
1343
1344         mutex_lock(&mdev->state_lock);
1345         if (mdev->device_up) {
1346                 err = mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 0);
1347                 if (err)
1348                         en_dbg(HW, priv, "Could not update stats\n");
1349
1350                 if (priv->port_up)
1351                         mlx4_en_auto_moderation(priv);
1352
1353                 queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);
1354         }
1355         if (mdev->mac_removed[MLX4_MAX_PORTS + 1 - priv->port]) {
1356                 mlx4_en_do_set_mac(priv);
1357                 mdev->mac_removed[MLX4_MAX_PORTS + 1 - priv->port] = 0;
1358         }
1359         mutex_unlock(&mdev->state_lock);
1360 }
1361
1362 static void mlx4_en_linkstate(struct work_struct *work)
1363 {
1364         struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
1365                                                  linkstate_task);
1366         struct mlx4_en_dev *mdev = priv->mdev;
1367         int linkstate = priv->link_state;
1368
1369         mutex_lock(&mdev->state_lock);
1370         /* If observable port state changed set carrier state and
1371          * report to system log */
1372         if (priv->last_link_state != linkstate) {
1373                 if (linkstate == MLX4_DEV_EVENT_PORT_DOWN) {
1374                         en_info(priv, "Link Down\n");
1375                         netif_carrier_off(priv->dev);
1376                 } else {
1377                         en_info(priv, "Link Up\n");
1378                         netif_carrier_on(priv->dev);
1379                 }
1380         }
1381         priv->last_link_state = linkstate;
1382         mutex_unlock(&mdev->state_lock);
1383 }
1384
1385
1386 int mlx4_en_start_port(struct net_device *dev)
1387 {
1388         struct mlx4_en_priv *priv = netdev_priv(dev);
1389         struct mlx4_en_dev *mdev = priv->mdev;
1390         struct mlx4_en_cq *cq;
1391         struct mlx4_en_tx_ring *tx_ring;
1392         int rx_index = 0;
1393         int tx_index = 0;
1394         int err = 0;
1395         int i;
1396         int j;
1397         u8 mc_list[16] = {0};
1398
1399         if (priv->port_up) {
1400                 en_dbg(DRV, priv, "start port called while port already up\n");
1401                 return 0;
1402         }
1403
1404         INIT_LIST_HEAD(&priv->mc_list);
1405         INIT_LIST_HEAD(&priv->curr_list);
1406         INIT_LIST_HEAD(&priv->ethtool_list);
1407         memset(&priv->ethtool_rules[0], 0,
1408                sizeof(struct ethtool_flow_id) * MAX_NUM_OF_FS_RULES);
1409
1410         /* Calculate Rx buf size */
1411         dev->mtu = min(dev->mtu, priv->max_mtu);
1412         mlx4_en_calc_rx_buf(dev);
1413         en_dbg(DRV, priv, "Rx buf size:%d\n", priv->rx_skb_size);
1414
1415         /* Configure rx cq's and rings */
1416         err = mlx4_en_activate_rx_rings(priv);
1417         if (err) {
1418                 en_err(priv, "Failed to activate RX rings\n");
1419                 return err;
1420         }
1421         for (i = 0; i < priv->rx_ring_num; i++) {
1422                 cq = &priv->rx_cq[i];
1423
1424                 err = mlx4_en_activate_cq(priv, cq, i);
1425                 if (err) {
1426                         en_err(priv, "Failed activating Rx CQ\n");
1427                         goto cq_err;
1428                 }
1429                 for (j = 0; j < cq->size; j++)
1430                         cq->buf[j].owner_sr_opcode = MLX4_CQE_OWNER_MASK;
1431                 err = mlx4_en_set_cq_moder(priv, cq);
1432                 if (err) {
1433                         en_err(priv, "Failed setting cq moderation parameters");
1434                         mlx4_en_deactivate_cq(priv, cq);
1435                         goto cq_err;
1436                 }
1437                 mlx4_en_arm_cq(priv, cq);
1438                 priv->rx_ring[i].cqn = cq->mcq.cqn;
1439                 ++rx_index;
1440         }
1441
1442         /* Set qp number */
1443         en_dbg(DRV, priv, "Getting qp number for port %d\n", priv->port);
1444         err = mlx4_en_get_qp(priv);
1445         if (err) {
1446                 en_err(priv, "Failed getting eth qp\n");
1447                 goto cq_err;
1448         }
1449         mdev->mac_removed[priv->port] = 0;
1450
1451         err = mlx4_en_config_rss_steer(priv);
1452         if (err) {
1453                 en_err(priv, "Failed configuring rss steering\n");
1454                 goto mac_err;
1455         }
1456
1457         err = mlx4_en_create_drop_qp(priv);
1458         if (err)
1459                 goto rss_err;
1460
1461         /* Configure tx cq's and rings */
1462         for (i = 0; i < priv->tx_ring_num; i++) {
1463                 /* Configure cq */
1464                 cq = &priv->tx_cq[i];
1465                 err = mlx4_en_activate_cq(priv, cq, i);
1466                 if (err) {
1467                         en_err(priv, "Failed allocating Tx CQ\n");
1468                         goto tx_err;
1469                 }
1470                 err = mlx4_en_set_cq_moder(priv, cq);
1471                 if (err) {
1472                         en_err(priv, "Failed setting cq moderation parameters");
1473                         mlx4_en_deactivate_cq(priv, cq);
1474                         goto tx_err;
1475                 }
1476                 en_dbg(DRV, priv, "Resetting index of collapsed CQ:%d to -1\n", i);
1477                 cq->buf->wqe_index = cpu_to_be16(0xffff);
1478
1479                 /* Configure ring */
1480                 tx_ring = &priv->tx_ring[i];
1481                 err = mlx4_en_activate_tx_ring(priv, tx_ring, cq->mcq.cqn,
1482                         i / priv->num_tx_rings_p_up);
1483                 if (err) {
1484                         en_err(priv, "Failed allocating Tx ring\n");
1485                         mlx4_en_deactivate_cq(priv, cq);
1486                         goto tx_err;
1487                 }
1488                 tx_ring->tx_queue = netdev_get_tx_queue(dev, i);
1489
1490                 /* Arm CQ for TX completions */
1491                 mlx4_en_arm_cq(priv, cq);
1492
1493                 /* Set initial ownership of all Tx TXBBs to SW (1) */
1494                 for (j = 0; j < tx_ring->buf_size; j += STAMP_STRIDE)
1495                         *((u32 *) (tx_ring->buf + j)) = 0xffffffff;
1496                 ++tx_index;
1497         }
1498
1499         /* Configure port */
1500         err = mlx4_SET_PORT_general(mdev->dev, priv->port,
1501                                     priv->rx_skb_size + ETH_FCS_LEN,
1502                                     priv->prof->tx_pause,
1503                                     priv->prof->tx_ppp,
1504                                     priv->prof->rx_pause,
1505                                     priv->prof->rx_ppp);
1506         if (err) {
1507                 en_err(priv, "Failed setting port general configurations for port %d, with error %d\n",
1508                        priv->port, err);
1509                 goto tx_err;
1510         }
1511         /* Set default qp number */
1512         err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port, priv->base_qpn, 0);
1513         if (err) {
1514                 en_err(priv, "Failed setting default qp numbers\n");
1515                 goto tx_err;
1516         }
1517
1518         /* Init port */
1519         en_dbg(HW, priv, "Initializing port\n");
1520         err = mlx4_INIT_PORT(mdev->dev, priv->port);
1521         if (err) {
1522                 en_err(priv, "Failed Initializing port\n");
1523                 goto tx_err;
1524         }
1525
1526         /* Attach rx QP to bradcast address */
1527         memset(&mc_list[10], 0xff, ETH_ALEN);
1528         mc_list[5] = priv->port; /* needed for B0 steering support */
1529         if (mlx4_multicast_attach(mdev->dev, &priv->rss_map.indir_qp, mc_list,
1530                                   priv->port, 0, MLX4_PROT_ETH,
1531                                   &priv->broadcast_id))
1532                 mlx4_warn(mdev, "Failed Attaching Broadcast\n");
1533
1534         /* Must redo promiscuous mode setup. */
1535         priv->flags &= ~(MLX4_EN_FLAG_PROMISC | MLX4_EN_FLAG_MC_PROMISC);
1536
1537         /* Schedule multicast task to populate multicast list */
1538         queue_work(mdev->workqueue, &priv->rx_mode_task);
1539
1540         mlx4_set_stats_bitmap(mdev->dev, &priv->stats_bitmap);
1541
1542         priv->port_up = true;
1543         netif_tx_start_all_queues(dev);
1544         netif_device_attach(dev);
1545
1546         return 0;
1547
1548 tx_err:
1549         while (tx_index--) {
1550                 mlx4_en_deactivate_tx_ring(priv, &priv->tx_ring[tx_index]);
1551                 mlx4_en_deactivate_cq(priv, &priv->tx_cq[tx_index]);
1552         }
1553         mlx4_en_destroy_drop_qp(priv);
1554 rss_err:
1555         mlx4_en_release_rss_steer(priv);
1556 mac_err:
1557         mlx4_en_put_qp(priv);
1558 cq_err:
1559         while (rx_index--)
1560                 mlx4_en_deactivate_cq(priv, &priv->rx_cq[rx_index]);
1561         for (i = 0; i < priv->rx_ring_num; i++)
1562                 mlx4_en_deactivate_rx_ring(priv, &priv->rx_ring[i]);
1563
1564         return err; /* need to close devices */
1565 }
1566
1567
1568 void mlx4_en_stop_port(struct net_device *dev, int detach)
1569 {
1570         struct mlx4_en_priv *priv = netdev_priv(dev);
1571         struct mlx4_en_dev *mdev = priv->mdev;
1572         struct mlx4_en_mc_list *mclist, *tmp;
1573         struct ethtool_flow_id *flow, *tmp_flow;
1574         int i;
1575         u8 mc_list[16] = {0};
1576
1577         if (!priv->port_up) {
1578                 en_dbg(DRV, priv, "stop port called while port already down\n");
1579                 return;
1580         }
1581
1582         /* Synchronize with tx routine */
1583         netif_tx_lock_bh(dev);
1584         if (detach)
1585                 netif_device_detach(dev);
1586         netif_tx_stop_all_queues(dev);
1587         netif_tx_unlock_bh(dev);
1588
1589         netif_tx_disable(dev);
1590
1591         /* Set port as not active */
1592         priv->port_up = false;
1593
1594         /* Promsicuous mode */
1595         if (mdev->dev->caps.steering_mode ==
1596             MLX4_STEERING_MODE_DEVICE_MANAGED) {
1597                 priv->flags &= ~(MLX4_EN_FLAG_PROMISC |
1598                                  MLX4_EN_FLAG_MC_PROMISC);
1599                 mlx4_flow_steer_promisc_remove(mdev->dev,
1600                                                priv->port,
1601                                                MLX4_FS_PROMISC_UPLINK);
1602                 mlx4_flow_steer_promisc_remove(mdev->dev,
1603                                                priv->port,
1604                                                MLX4_FS_PROMISC_ALL_MULTI);
1605         } else if (priv->flags & MLX4_EN_FLAG_PROMISC) {
1606                 priv->flags &= ~MLX4_EN_FLAG_PROMISC;
1607
1608                 /* Disable promiscouos mode */
1609                 mlx4_unicast_promisc_remove(mdev->dev, priv->base_qpn,
1610                                             priv->port);
1611
1612                 /* Disable Multicast promisc */
1613                 if (priv->flags & MLX4_EN_FLAG_MC_PROMISC) {
1614                         mlx4_multicast_promisc_remove(mdev->dev, priv->base_qpn,
1615                                                       priv->port);
1616                         priv->flags &= ~MLX4_EN_FLAG_MC_PROMISC;
1617                 }
1618         }
1619
1620         /* Detach All multicasts */
1621         memset(&mc_list[10], 0xff, ETH_ALEN);
1622         mc_list[5] = priv->port; /* needed for B0 steering support */
1623         mlx4_multicast_detach(mdev->dev, &priv->rss_map.indir_qp, mc_list,
1624                               MLX4_PROT_ETH, priv->broadcast_id);
1625         list_for_each_entry(mclist, &priv->curr_list, list) {
1626                 memcpy(&mc_list[10], mclist->addr, ETH_ALEN);
1627                 mc_list[5] = priv->port;
1628                 mlx4_multicast_detach(mdev->dev, &priv->rss_map.indir_qp,
1629                                       mc_list, MLX4_PROT_ETH, mclist->reg_id);
1630         }
1631         mlx4_en_clear_list(dev);
1632         list_for_each_entry_safe(mclist, tmp, &priv->curr_list, list) {
1633                 list_del(&mclist->list);
1634                 kfree(mclist);
1635         }
1636
1637         /* Flush multicast filter */
1638         mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0, 1, MLX4_MCAST_CONFIG);
1639
1640         /* Remove flow steering rules for the port*/
1641         if (mdev->dev->caps.steering_mode ==
1642             MLX4_STEERING_MODE_DEVICE_MANAGED) {
1643                 ASSERT_RTNL();
1644                 list_for_each_entry_safe(flow, tmp_flow,
1645                                          &priv->ethtool_list, list) {
1646                         mlx4_flow_detach(mdev->dev, flow->id);
1647                         list_del(&flow->list);
1648                 }
1649         }
1650
1651         mlx4_en_destroy_drop_qp(priv);
1652
1653         /* Free TX Rings */
1654         for (i = 0; i < priv->tx_ring_num; i++) {
1655                 mlx4_en_deactivate_tx_ring(priv, &priv->tx_ring[i]);
1656                 mlx4_en_deactivate_cq(priv, &priv->tx_cq[i]);
1657         }
1658         msleep(10);
1659
1660         for (i = 0; i < priv->tx_ring_num; i++)
1661                 mlx4_en_free_tx_buf(dev, &priv->tx_ring[i]);
1662
1663         /* Free RSS qps */
1664         mlx4_en_release_rss_steer(priv);
1665
1666         /* Unregister Mac address for the port */
1667         mlx4_en_put_qp(priv);
1668         if (!(mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAGS2_REASSIGN_MAC_EN))
1669                 mdev->mac_removed[priv->port] = 1;
1670
1671         /* Free RX Rings */
1672         for (i = 0; i < priv->rx_ring_num; i++) {
1673                 mlx4_en_deactivate_rx_ring(priv, &priv->rx_ring[i]);
1674                 while (test_bit(NAPI_STATE_SCHED, &priv->rx_cq[i].napi.state))
1675                         msleep(1);
1676                 mlx4_en_deactivate_cq(priv, &priv->rx_cq[i]);
1677         }
1678
1679         /* close port*/
1680         mlx4_CLOSE_PORT(mdev->dev, priv->port);
1681 }
1682
1683 static void mlx4_en_restart(struct work_struct *work)
1684 {
1685         struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
1686                                                  watchdog_task);
1687         struct mlx4_en_dev *mdev = priv->mdev;
1688         struct net_device *dev = priv->dev;
1689
1690         en_dbg(DRV, priv, "Watchdog task called for port %d\n", priv->port);
1691
1692         mutex_lock(&mdev->state_lock);
1693         if (priv->port_up) {
1694                 mlx4_en_stop_port(dev, 1);
1695                 if (mlx4_en_start_port(dev))
1696                         en_err(priv, "Failed restarting port %d\n", priv->port);
1697         }
1698         mutex_unlock(&mdev->state_lock);
1699 }
1700
1701 static void mlx4_en_clear_stats(struct net_device *dev)
1702 {
1703         struct mlx4_en_priv *priv = netdev_priv(dev);
1704         struct mlx4_en_dev *mdev = priv->mdev;
1705         int i;
1706
1707         if (mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 1))
1708                 en_dbg(HW, priv, "Failed dumping statistics\n");
1709
1710         memset(&priv->stats, 0, sizeof(priv->stats));
1711         memset(&priv->pstats, 0, sizeof(priv->pstats));
1712         memset(&priv->pkstats, 0, sizeof(priv->pkstats));
1713         memset(&priv->port_stats, 0, sizeof(priv->port_stats));
1714
1715         for (i = 0; i < priv->tx_ring_num; i++) {
1716                 priv->tx_ring[i].bytes = 0;
1717                 priv->tx_ring[i].packets = 0;
1718                 priv->tx_ring[i].tx_csum = 0;
1719         }
1720         for (i = 0; i < priv->rx_ring_num; i++) {
1721                 priv->rx_ring[i].bytes = 0;
1722                 priv->rx_ring[i].packets = 0;
1723                 priv->rx_ring[i].csum_ok = 0;
1724                 priv->rx_ring[i].csum_none = 0;
1725         }
1726 }
1727
1728 static int mlx4_en_open(struct net_device *dev)
1729 {
1730         struct mlx4_en_priv *priv = netdev_priv(dev);
1731         struct mlx4_en_dev *mdev = priv->mdev;
1732         int err = 0;
1733
1734         mutex_lock(&mdev->state_lock);
1735
1736         if (!mdev->device_up) {
1737                 en_err(priv, "Cannot open - device down/disabled\n");
1738                 err = -EBUSY;
1739                 goto out;
1740         }
1741
1742         /* Reset HW statistics and SW counters */
1743         mlx4_en_clear_stats(dev);
1744
1745         err = mlx4_en_start_port(dev);
1746         if (err)
1747                 en_err(priv, "Failed starting port:%d\n", priv->port);
1748
1749 out:
1750         mutex_unlock(&mdev->state_lock);
1751         return err;
1752 }
1753
1754
1755 static int mlx4_en_close(struct net_device *dev)
1756 {
1757         struct mlx4_en_priv *priv = netdev_priv(dev);
1758         struct mlx4_en_dev *mdev = priv->mdev;
1759
1760         en_dbg(IFDOWN, priv, "Close port called\n");
1761
1762         mutex_lock(&mdev->state_lock);
1763
1764         mlx4_en_stop_port(dev, 0);
1765         netif_carrier_off(dev);
1766
1767         mutex_unlock(&mdev->state_lock);
1768         return 0;
1769 }
1770
1771 void mlx4_en_free_resources(struct mlx4_en_priv *priv)
1772 {
1773         int i;
1774
1775 #ifdef CONFIG_RFS_ACCEL
1776         free_irq_cpu_rmap(priv->dev->rx_cpu_rmap);
1777         priv->dev->rx_cpu_rmap = NULL;
1778 #endif
1779
1780         for (i = 0; i < priv->tx_ring_num; i++) {
1781                 if (priv->tx_ring[i].tx_info)
1782                         mlx4_en_destroy_tx_ring(priv, &priv->tx_ring[i]);
1783                 if (priv->tx_cq[i].buf)
1784                         mlx4_en_destroy_cq(priv, &priv->tx_cq[i]);
1785         }
1786
1787         for (i = 0; i < priv->rx_ring_num; i++) {
1788                 if (priv->rx_ring[i].rx_info)
1789                         mlx4_en_destroy_rx_ring(priv, &priv->rx_ring[i],
1790                                 priv->prof->rx_ring_size, priv->stride);
1791                 if (priv->rx_cq[i].buf)
1792                         mlx4_en_destroy_cq(priv, &priv->rx_cq[i]);
1793         }
1794
1795         if (priv->base_tx_qpn) {
1796                 mlx4_qp_release_range(priv->mdev->dev, priv->base_tx_qpn, priv->tx_ring_num);
1797                 priv->base_tx_qpn = 0;
1798         }
1799 }
1800
1801 int mlx4_en_alloc_resources(struct mlx4_en_priv *priv)
1802 {
1803         struct mlx4_en_port_profile *prof = priv->prof;
1804         int i;
1805         int err;
1806
1807         err = mlx4_qp_reserve_range(priv->mdev->dev, priv->tx_ring_num, 256, &priv->base_tx_qpn);
1808         if (err) {
1809                 en_err(priv, "failed reserving range for TX rings\n");
1810                 return err;
1811         }
1812
1813         /* Create tx Rings */
1814         for (i = 0; i < priv->tx_ring_num; i++) {
1815                 if (mlx4_en_create_cq(priv, &priv->tx_cq[i],
1816                                       prof->tx_ring_size, i, TX))
1817                         goto err;
1818
1819                 if (mlx4_en_create_tx_ring(priv, &priv->tx_ring[i], priv->base_tx_qpn + i,
1820                                            prof->tx_ring_size, TXBB_SIZE))
1821                         goto err;
1822         }
1823
1824         /* Create rx Rings */
1825         for (i = 0; i < priv->rx_ring_num; i++) {
1826                 if (mlx4_en_create_cq(priv, &priv->rx_cq[i],
1827                                       prof->rx_ring_size, i, RX))
1828                         goto err;
1829
1830                 if (mlx4_en_create_rx_ring(priv, &priv->rx_ring[i],
1831                                            prof->rx_ring_size, priv->stride))
1832                         goto err;
1833         }
1834
1835 #ifdef CONFIG_RFS_ACCEL
1836         if (priv->mdev->dev->caps.comp_pool) {
1837                 priv->dev->rx_cpu_rmap = alloc_irq_cpu_rmap(priv->mdev->dev->caps.comp_pool);
1838                 if (!priv->dev->rx_cpu_rmap)
1839                         goto err;
1840         }
1841 #endif
1842
1843         return 0;
1844
1845 err:
1846         en_err(priv, "Failed to allocate NIC resources\n");
1847         return -ENOMEM;
1848 }
1849
1850
1851 void mlx4_en_destroy_netdev(struct net_device *dev)
1852 {
1853         struct mlx4_en_priv *priv = netdev_priv(dev);
1854         struct mlx4_en_dev *mdev = priv->mdev;
1855
1856         en_dbg(DRV, priv, "Destroying netdev on port:%d\n", priv->port);
1857
1858         /* Unregister device - this will close the port if it was up */
1859         if (priv->registered)
1860                 unregister_netdev(dev);
1861
1862         if (priv->allocated)
1863                 mlx4_free_hwq_res(mdev->dev, &priv->res, MLX4_EN_PAGE_SIZE);
1864
1865         cancel_delayed_work(&priv->stats_task);
1866         /* flush any pending task for this netdev */
1867         flush_workqueue(mdev->workqueue);
1868
1869         /* Detach the netdev so tasks would not attempt to access it */
1870         mutex_lock(&mdev->state_lock);
1871         mdev->pndev[priv->port] = NULL;
1872         mutex_unlock(&mdev->state_lock);
1873
1874         mlx4_en_free_resources(priv);
1875
1876         kfree(priv->tx_ring);
1877         kfree(priv->tx_cq);
1878
1879         free_netdev(dev);
1880 }
1881
1882 static int mlx4_en_change_mtu(struct net_device *dev, int new_mtu)
1883 {
1884         struct mlx4_en_priv *priv = netdev_priv(dev);
1885         struct mlx4_en_dev *mdev = priv->mdev;
1886         int err = 0;
1887
1888         en_dbg(DRV, priv, "Change MTU called - current:%d new:%d\n",
1889                  dev->mtu, new_mtu);
1890
1891         if ((new_mtu < MLX4_EN_MIN_MTU) || (new_mtu > priv->max_mtu)) {
1892                 en_err(priv, "Bad MTU size:%d.\n", new_mtu);
1893                 return -EPERM;
1894         }
1895         dev->mtu = new_mtu;
1896
1897         if (netif_running(dev)) {
1898                 mutex_lock(&mdev->state_lock);
1899                 if (!mdev->device_up) {
1900                         /* NIC is probably restarting - let watchdog task reset
1901                          * the port */
1902                         en_dbg(DRV, priv, "Change MTU called with card down!?\n");
1903                 } else {
1904                         mlx4_en_stop_port(dev, 1);
1905                         err = mlx4_en_start_port(dev);
1906                         if (err) {
1907                                 en_err(priv, "Failed restarting port:%d\n",
1908                                          priv->port);
1909                                 queue_work(mdev->workqueue, &priv->watchdog_task);
1910                         }
1911                 }
1912                 mutex_unlock(&mdev->state_lock);
1913         }
1914         return 0;
1915 }
1916
1917 static int mlx4_en_set_features(struct net_device *netdev,
1918                 netdev_features_t features)
1919 {
1920         struct mlx4_en_priv *priv = netdev_priv(netdev);
1921
1922         if (features & NETIF_F_LOOPBACK)
1923                 priv->ctrl_flags |= cpu_to_be32(MLX4_WQE_CTRL_FORCE_LOOPBACK);
1924         else
1925                 priv->ctrl_flags &=
1926                         cpu_to_be32(~MLX4_WQE_CTRL_FORCE_LOOPBACK);
1927
1928         mlx4_en_update_loopback_state(netdev, features);
1929
1930         return 0;
1931
1932 }
1933
1934 static int mlx4_en_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
1935                            struct net_device *dev,
1936                            const unsigned char *addr, u16 flags)
1937 {
1938         struct mlx4_en_priv *priv = netdev_priv(dev);
1939         struct mlx4_dev *mdev = priv->mdev->dev;
1940         int err;
1941
1942         if (!mlx4_is_mfunc(mdev))
1943                 return -EOPNOTSUPP;
1944
1945         /* Hardware does not support aging addresses, allow only
1946          * permanent addresses if ndm_state is given
1947          */
1948         if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
1949                 en_info(priv, "Add FDB only supports static addresses\n");
1950                 return -EINVAL;
1951         }
1952
1953         if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
1954                 err = dev_uc_add_excl(dev, addr);
1955         else if (is_multicast_ether_addr(addr))
1956                 err = dev_mc_add_excl(dev, addr);
1957         else
1958                 err = -EINVAL;
1959
1960         /* Only return duplicate errors if NLM_F_EXCL is set */
1961         if (err == -EEXIST && !(flags & NLM_F_EXCL))
1962                 err = 0;
1963
1964         return err;
1965 }
1966
1967 static int mlx4_en_fdb_del(struct ndmsg *ndm,
1968                            struct nlattr *tb[],
1969                            struct net_device *dev,
1970                            const unsigned char *addr)
1971 {
1972         struct mlx4_en_priv *priv = netdev_priv(dev);
1973         struct mlx4_dev *mdev = priv->mdev->dev;
1974         int err;
1975
1976         if (!mlx4_is_mfunc(mdev))
1977                 return -EOPNOTSUPP;
1978
1979         if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
1980                 en_info(priv, "Del FDB only supports static addresses\n");
1981                 return -EINVAL;
1982         }
1983
1984         if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
1985                 err = dev_uc_del(dev, addr);
1986         else if (is_multicast_ether_addr(addr))
1987                 err = dev_mc_del(dev, addr);
1988         else
1989                 err = -EINVAL;
1990
1991         return err;
1992 }
1993
1994 static int mlx4_en_fdb_dump(struct sk_buff *skb,
1995                             struct netlink_callback *cb,
1996                             struct net_device *dev, int idx)
1997 {
1998         struct mlx4_en_priv *priv = netdev_priv(dev);
1999         struct mlx4_dev *mdev = priv->mdev->dev;
2000
2001         if (mlx4_is_mfunc(mdev))
2002                 idx = ndo_dflt_fdb_dump(skb, cb, dev, idx);
2003
2004         return idx;
2005 }
2006
2007 static const struct net_device_ops mlx4_netdev_ops = {
2008         .ndo_open               = mlx4_en_open,
2009         .ndo_stop               = mlx4_en_close,
2010         .ndo_start_xmit         = mlx4_en_xmit,
2011         .ndo_select_queue       = mlx4_en_select_queue,
2012         .ndo_get_stats          = mlx4_en_get_stats,
2013         .ndo_set_rx_mode        = mlx4_en_set_rx_mode,
2014         .ndo_set_mac_address    = mlx4_en_set_mac,
2015         .ndo_validate_addr      = eth_validate_addr,
2016         .ndo_change_mtu         = mlx4_en_change_mtu,
2017         .ndo_tx_timeout         = mlx4_en_tx_timeout,
2018         .ndo_vlan_rx_add_vid    = mlx4_en_vlan_rx_add_vid,
2019         .ndo_vlan_rx_kill_vid   = mlx4_en_vlan_rx_kill_vid,
2020 #ifdef CONFIG_NET_POLL_CONTROLLER
2021         .ndo_poll_controller    = mlx4_en_netpoll,
2022 #endif
2023         .ndo_set_features       = mlx4_en_set_features,
2024         .ndo_setup_tc           = mlx4_en_setup_tc,
2025 #ifdef CONFIG_RFS_ACCEL
2026         .ndo_rx_flow_steer      = mlx4_en_filter_rfs,
2027 #endif
2028         .ndo_fdb_add            = mlx4_en_fdb_add,
2029         .ndo_fdb_del            = mlx4_en_fdb_del,
2030         .ndo_fdb_dump           = mlx4_en_fdb_dump,
2031 };
2032
2033 int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port,
2034                         struct mlx4_en_port_profile *prof)
2035 {
2036         struct net_device *dev;
2037         struct mlx4_en_priv *priv;
2038         int i;
2039         int err;
2040
2041         dev = alloc_etherdev_mqs(sizeof(struct mlx4_en_priv),
2042                                  MAX_TX_RINGS, MAX_RX_RINGS);
2043         if (dev == NULL)
2044                 return -ENOMEM;
2045
2046         netif_set_real_num_tx_queues(dev, prof->tx_ring_num);
2047         netif_set_real_num_rx_queues(dev, prof->rx_ring_num);
2048
2049         SET_NETDEV_DEV(dev, &mdev->dev->pdev->dev);
2050         dev->dev_id =  port - 1;
2051
2052         /*
2053          * Initialize driver private data
2054          */
2055
2056         priv = netdev_priv(dev);
2057         memset(priv, 0, sizeof(struct mlx4_en_priv));
2058         priv->dev = dev;
2059         priv->mdev = mdev;
2060         priv->ddev = &mdev->pdev->dev;
2061         priv->prof = prof;
2062         priv->port = port;
2063         priv->port_up = false;
2064         priv->flags = prof->flags;
2065         priv->ctrl_flags = cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE |
2066                         MLX4_WQE_CTRL_SOLICITED);
2067         priv->num_tx_rings_p_up = mdev->profile.num_tx_rings_p_up;
2068         priv->tx_ring_num = prof->tx_ring_num;
2069
2070         priv->tx_ring = kzalloc(sizeof(struct mlx4_en_tx_ring) * MAX_TX_RINGS,
2071                                 GFP_KERNEL);
2072         if (!priv->tx_ring) {
2073                 err = -ENOMEM;
2074                 goto out;
2075         }
2076         priv->tx_cq = kzalloc(sizeof(struct mlx4_en_cq) * MAX_TX_RINGS,
2077                               GFP_KERNEL);
2078         if (!priv->tx_cq) {
2079                 err = -ENOMEM;
2080                 goto out;
2081         }
2082         priv->rx_ring_num = prof->rx_ring_num;
2083         priv->cqe_factor = (mdev->dev->caps.cqe_size == 64) ? 1 : 0;
2084         priv->mac_index = -1;
2085         priv->msg_enable = MLX4_EN_MSG_LEVEL;
2086         spin_lock_init(&priv->stats_lock);
2087         INIT_WORK(&priv->rx_mode_task, mlx4_en_do_set_rx_mode);
2088         INIT_WORK(&priv->watchdog_task, mlx4_en_restart);
2089         INIT_WORK(&priv->linkstate_task, mlx4_en_linkstate);
2090         INIT_DELAYED_WORK(&priv->stats_task, mlx4_en_do_get_stats);
2091 #ifdef CONFIG_MLX4_EN_DCB
2092         if (!mlx4_is_slave(priv->mdev->dev))
2093                 dev->dcbnl_ops = &mlx4_en_dcbnl_ops;
2094 #endif
2095
2096         for (i = 0; i < MLX4_EN_MAC_HASH_SIZE; ++i)
2097                 INIT_HLIST_HEAD(&priv->mac_hash[i]);
2098
2099         /* Query for default mac and max mtu */
2100         priv->max_mtu = mdev->dev->caps.eth_mtu_cap[priv->port];
2101
2102         /* Set default MAC */
2103         dev->addr_len = ETH_ALEN;
2104         mlx4_en_u64_to_mac(dev->dev_addr, mdev->dev->caps.def_mac[priv->port]);
2105         if (!is_valid_ether_addr(dev->dev_addr)) {
2106                 en_err(priv, "Port: %d, invalid mac burned: %pM, quiting\n",
2107                        priv->port, dev->dev_addr);
2108                 err = -EINVAL;
2109                 goto out;
2110         }
2111
2112         memcpy(priv->prev_mac, dev->dev_addr, sizeof(priv->prev_mac));
2113
2114         priv->stride = roundup_pow_of_two(sizeof(struct mlx4_en_rx_desc) +
2115                                           DS_SIZE * MLX4_EN_MAX_RX_FRAGS);
2116         err = mlx4_en_alloc_resources(priv);
2117         if (err)
2118                 goto out;
2119
2120 #ifdef CONFIG_RFS_ACCEL
2121         INIT_LIST_HEAD(&priv->filters);
2122         spin_lock_init(&priv->filters_lock);
2123 #endif
2124
2125         /* Allocate page for receive rings */
2126         err = mlx4_alloc_hwq_res(mdev->dev, &priv->res,
2127                                 MLX4_EN_PAGE_SIZE, MLX4_EN_PAGE_SIZE);
2128         if (err) {
2129                 en_err(priv, "Failed to allocate page for rx qps\n");
2130                 goto out;
2131         }
2132         priv->allocated = 1;
2133
2134         /*
2135          * Initialize netdev entry points
2136          */
2137         dev->netdev_ops = &mlx4_netdev_ops;
2138         dev->watchdog_timeo = MLX4_EN_WATCHDOG_TIMEOUT;
2139         netif_set_real_num_tx_queues(dev, priv->tx_ring_num);
2140         netif_set_real_num_rx_queues(dev, priv->rx_ring_num);
2141
2142         SET_ETHTOOL_OPS(dev, &mlx4_en_ethtool_ops);
2143
2144         /*
2145          * Set driver features
2146          */
2147         dev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
2148         if (mdev->LSO_support)
2149                 dev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6;
2150
2151         dev->vlan_features = dev->hw_features;
2152
2153         dev->hw_features |= NETIF_F_RXCSUM | NETIF_F_RXHASH;
2154         dev->features = dev->hw_features | NETIF_F_HIGHDMA |
2155                         NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX |
2156                         NETIF_F_HW_VLAN_FILTER;
2157         dev->hw_features |= NETIF_F_LOOPBACK;
2158
2159         if (mdev->dev->caps.steering_mode ==
2160             MLX4_STEERING_MODE_DEVICE_MANAGED)
2161                 dev->hw_features |= NETIF_F_NTUPLE;
2162
2163         if (mdev->dev->caps.steering_mode != MLX4_STEERING_MODE_A0)
2164                 dev->priv_flags |= IFF_UNICAST_FLT;
2165
2166         mdev->pndev[port] = dev;
2167
2168         netif_carrier_off(dev);
2169         err = register_netdev(dev);
2170         if (err) {
2171                 en_err(priv, "Netdev registration failed for port %d\n", port);
2172                 goto out;
2173         }
2174         priv->registered = 1;
2175
2176         en_warn(priv, "Using %d TX rings\n", prof->tx_ring_num);
2177         en_warn(priv, "Using %d RX rings\n", prof->rx_ring_num);
2178
2179         mlx4_en_update_loopback_state(priv->dev, priv->dev->features);
2180
2181         /* Configure port */
2182         mlx4_en_calc_rx_buf(dev);
2183         err = mlx4_SET_PORT_general(mdev->dev, priv->port,
2184                                     priv->rx_skb_size + ETH_FCS_LEN,
2185                                     prof->tx_pause, prof->tx_ppp,
2186                                     prof->rx_pause, prof->rx_ppp);
2187         if (err) {
2188                 en_err(priv, "Failed setting port general configurations "
2189                        "for port %d, with error %d\n", priv->port, err);
2190                 goto out;
2191         }
2192
2193         /* Init port */
2194         en_warn(priv, "Initializing port\n");
2195         err = mlx4_INIT_PORT(mdev->dev, priv->port);
2196         if (err) {
2197                 en_err(priv, "Failed Initializing port\n");
2198                 goto out;
2199         }
2200         mlx4_en_set_default_moderation(priv);
2201         queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);
2202         return 0;
2203
2204 out:
2205         mlx4_en_destroy_netdev(dev);
2206         return err;
2207 }
2208