drivers/s390/net/qeth_l2_main.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *    Copyright IBM Corp. 2007, 2009
   4  *    Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
   5  *               Frank Pavlic <fpavlic@de.ibm.com>,
   6  *               Thomas Spatzier <tspat@de.ibm.com>,
   7  *               Frank Blaschka <frank.blaschka@de.ibm.com>
   8  */
   9
  10 #define KMSG_COMPONENT "qeth"
  11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  12
  13 #include <linux/module.h>
  14 #include <linux/moduleparam.h>
  15 #include <linux/string.h>
  16 #include <linux/errno.h>
  17 #include <linux/kernel.h>
  18 #include <linux/slab.h>
  19 #include <linux/etherdevice.h>
  20 #include <linux/if_bridge.h>
  21 #include <linux/list.h>
  22 #include <linux/hash.h>
  23 #include <linux/hashtable.h>
  24 #include <net/switchdev.h>
  25 #include <asm/chsc.h>
  26 #include <asm/css_chars.h>
  27 #include <asm/setup.h>
  28 #include "qeth_core.h"
  29 #include "qeth_l2.h"
  30
  31 static int qeth_l2_setdelmac_makerc(struct qeth_card *card, u16 retcode)
  32 {
  33         int rc;
  34
  35         if (retcode)
  36                 QETH_CARD_TEXT_(card, 2, "err%04x", retcode);
  37         switch (retcode) {
  38         case IPA_RC_SUCCESS:
  39                 rc = 0;
  40                 break;
  41         case IPA_RC_L2_UNSUPPORTED_CMD:
  42                 rc = -EOPNOTSUPP;
  43                 break;
  44         case IPA_RC_L2_ADDR_TABLE_FULL:
  45                 rc = -ENOSPC;
  46                 break;
  47         case IPA_RC_L2_DUP_MAC:
  48         case IPA_RC_L2_DUP_LAYER3_MAC:
  49                 rc = -EADDRINUSE;
  50                 break;
  51         case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
  52         case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
  53                 rc = -EADDRNOTAVAIL;
  54                 break;
  55         case IPA_RC_L2_MAC_NOT_FOUND:
  56                 rc = -ENOENT;
  57                 break;
  58         default:
  59                 rc = -EIO;
  60                 break;
  61         }
  62         return rc;
  63 }
  64
  65 static int qeth_l2_send_setdelmac_cb(struct qeth_card *card,
  66                                      struct qeth_reply *reply,
  67                                      unsigned long data)
  68 {
  69         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
  70
  71         return qeth_l2_setdelmac_makerc(card, cmd->hdr.return_code);
  72 }
  73
  74 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
  75                            enum qeth_ipa_cmds ipacmd)
  76 {
  77         struct qeth_ipa_cmd *cmd;
  78         struct qeth_cmd_buffer *iob;
  79
  80         QETH_CARD_TEXT(card, 2, "L2sdmac");
  81         iob = qeth_ipa_alloc_cmd(card, ipacmd, QETH_PROT_IPV4,
  82                                  IPA_DATA_SIZEOF(setdelmac));
  83         if (!iob)
  84                 return -ENOMEM;
  85         cmd = __ipa_cmd(iob);
  86         cmd->data.setdelmac.mac_length = ETH_ALEN;
  87         ether_addr_copy(cmd->data.setdelmac.mac, mac);
  88         return qeth_send_ipa_cmd(card, iob, qeth_l2_send_setdelmac_cb, NULL);
  89 }
  90
  91 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
  92 {
  93         int rc;
  94
  95         QETH_CARD_TEXT(card, 2, "L2Setmac");
  96         rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC);
  97         if (rc == 0) {
  98                 dev_info(&card->gdev->dev,
  99                          "MAC address %pM successfully registered\n", mac);
 100         } else {
 101                 switch (rc) {
 102                 case -EADDRINUSE:
 103                         dev_warn(&card->gdev->dev,
 104                                 "MAC address %pM already exists\n", mac);
 105                         break;
 106                 case -EADDRNOTAVAIL:
 107                         dev_warn(&card->gdev->dev,
 108                                 "MAC address %pM is not authorized\n", mac);
 109                         break;
 110                 }
 111         }
 112         return rc;
 113 }
 114
 115 static int qeth_l2_write_mac(struct qeth_card *card, u8 *mac)
 116 {
 117         enum qeth_ipa_cmds cmd = is_multicast_ether_addr(mac) ?
 118                                         IPA_CMD_SETGMAC : IPA_CMD_SETVMAC;
 119         int rc;
 120
 121         QETH_CARD_TEXT(card, 2, "L2Wmac");
 122         rc = qeth_l2_send_setdelmac(card, mac, cmd);
 123         if (rc == -EADDRINUSE)
 124                 QETH_DBF_MESSAGE(2, "MAC already registered on device %x\n",
 125                                  CARD_DEVID(card));
 126         else if (rc)
 127                 QETH_DBF_MESSAGE(2, "Failed to register MAC on device %x: %d\n",
 128                                  CARD_DEVID(card), rc);
 129         return rc;
 130 }
 131
 132 static int qeth_l2_remove_mac(struct qeth_card *card, u8 *mac)
 133 {
 134         enum qeth_ipa_cmds cmd = is_multicast_ether_addr(mac) ?
 135                                         IPA_CMD_DELGMAC : IPA_CMD_DELVMAC;
 136         int rc;
 137
 138         QETH_CARD_TEXT(card, 2, "L2Rmac");
 139         rc = qeth_l2_send_setdelmac(card, mac, cmd);
 140         if (rc)
 141                 QETH_DBF_MESSAGE(2, "Failed to delete MAC on device %u: %d\n",
 142                                  CARD_DEVID(card), rc);
 143         return rc;
 144 }
 145
 146 static void qeth_l2_drain_rx_mode_cache(struct qeth_card *card)
 147 {
 148         struct qeth_mac *mac;
 149         struct hlist_node *tmp;
 150         int i;
 151
 152         hash_for_each_safe(card->rx_mode_addrs, i, tmp, mac, hnode) {
 153                 hash_del(&mac->hnode);
 154                 kfree(mac);
 155         }
 156 }
 157
 158 static void qeth_l2_fill_header(struct qeth_qdio_out_q *queue,
 159                                 struct qeth_hdr *hdr, struct sk_buff *skb,
 160                                 int ipv, unsigned int data_len)
 161 {
 162         int cast_type = qeth_get_ether_cast_type(skb);
 163         struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
 164
 165         hdr->hdr.l2.pkt_length = data_len;
 166
 167         if (skb_is_gso(skb)) {
 168                 hdr->hdr.l2.id = QETH_HEADER_TYPE_L2_TSO;
 169         } else {
 170                 hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
 171                 if (skb->ip_summed == CHECKSUM_PARTIAL)
 172                         qeth_tx_csum(skb, &hdr->hdr.l2.flags[1], ipv);
 173         }
 174
 175         /* set byte byte 3 to casting flags */
 176         if (cast_type == RTN_MULTICAST)
 177                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 178         else if (cast_type == RTN_BROADCAST)
 179                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 180         else
 181                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 182
 183         /* VSWITCH relies on the VLAN
 184          * information to be present in
 185          * the QDIO header */
 186         if (veth->h_vlan_proto == htons(ETH_P_8021Q)) {
 187                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
 188                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
 189         }
 190 }
 191
 192 static int qeth_l2_setdelvlan_makerc(struct qeth_card *card, u16 retcode)
 193 {
 194         if (retcode)
 195                 QETH_CARD_TEXT_(card, 2, "err%04x", retcode);
 196
 197         switch (retcode) {
 198         case IPA_RC_SUCCESS:
 199                 return 0;
 200         case IPA_RC_L2_INVALID_VLAN_ID:
 201                 return -EINVAL;
 202         case IPA_RC_L2_DUP_VLAN_ID:
 203                 return -EEXIST;
 204         case IPA_RC_L2_VLAN_ID_NOT_FOUND:
 205                 return -ENOENT;
 206         case IPA_RC_L2_VLAN_ID_NOT_ALLOWED:
 207                 return -EPERM;
 208         default:
 209                 return -EIO;
 210         }
 211 }
 212
 213 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
 214                                       struct qeth_reply *reply,
 215                                       unsigned long data)
 216 {
 217         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
 218
 219         QETH_CARD_TEXT(card, 2, "L2sdvcb");
 220         if (cmd->hdr.return_code) {
 221                 QETH_DBF_MESSAGE(2, "Error in processing VLAN %u on device %x: %#x.\n",
 222                                  cmd->data.setdelvlan.vlan_id,
 223                                  CARD_DEVID(card), cmd->hdr.return_code);
 224                 QETH_CARD_TEXT_(card, 2, "L2VL%4x", cmd->hdr.command);
 225         }
 226         return qeth_l2_setdelvlan_makerc(card, cmd->hdr.return_code);
 227 }
 228
 229 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
 230                                    enum qeth_ipa_cmds ipacmd)
 231 {
 232         struct qeth_ipa_cmd *cmd;
 233         struct qeth_cmd_buffer *iob;
 234
 235         QETH_CARD_TEXT_(card, 4, "L2sdv%x", ipacmd);
 236         iob = qeth_ipa_alloc_cmd(card, ipacmd, QETH_PROT_IPV4,
 237                                  IPA_DATA_SIZEOF(setdelvlan));
 238         if (!iob)
 239                 return -ENOMEM;
 240         cmd = __ipa_cmd(iob);
 241         cmd->data.setdelvlan.vlan_id = i;
 242         return qeth_send_ipa_cmd(card, iob, qeth_l2_send_setdelvlan_cb, NULL);
 243 }
 244
 245 static int qeth_l2_vlan_rx_add_vid(struct net_device *dev,
 246                                    __be16 proto, u16 vid)
 247 {
 248         struct qeth_card *card = dev->ml_priv;
 249
 250         QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
 251         if (!vid)
 252                 return 0;
 253
 254         return qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
 255 }
 256
 257 static int qeth_l2_vlan_rx_kill_vid(struct net_device *dev,
 258                                     __be16 proto, u16 vid)
 259 {
 260         struct qeth_card *card = dev->ml_priv;
 261
 262         QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
 263         if (!vid)
 264                 return 0;
 265
 266         return qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 267 }
 268
 269 static void qeth_l2_set_pnso_mode(struct qeth_card *card,
 270                                   enum qeth_pnso_mode mode)
 271 {
 272         spin_lock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 273         WRITE_ONCE(card->info.pnso_mode, mode);
 274         spin_unlock_irq(get_ccwdev_lock(CARD_RDEV(card)));
 275
 276         if (mode == QETH_PNSO_NONE)
 277                 drain_workqueue(card->event_wq);
 278 }
 279
 280 static void qeth_l2_dev2br_fdb_flush(struct qeth_card *card)
 281 {
 282         struct switchdev_notifier_fdb_info info;
 283
 284         QETH_CARD_TEXT(card, 2, "fdbflush");
 285
 286         info.addr = NULL;
 287         /* flush all VLANs: */
 288         info.vid = 0;
 289         info.added_by_user = false;
 290         info.offloaded = true;
 291
 292         call_switchdev_notifiers(SWITCHDEV_FDB_FLUSH_TO_BRIDGE,
 293                                  card->dev, &info.info, NULL);
 294 }
 295
 296 static int qeth_l2_request_initial_mac(struct qeth_card *card)
 297 {
 298         int rc = 0;
 299
 300         QETH_CARD_TEXT(card, 2, "l2reqmac");
 301
 302         if (MACHINE_IS_VM) {
 303                 rc = qeth_vm_request_mac(card);
 304                 if (!rc)
 305                         goto out;
 306                 QETH_DBF_MESSAGE(2, "z/VM MAC Service failed on device %x: %#x\n",
 307                                  CARD_DEVID(card), rc);
 308                 QETH_CARD_TEXT_(card, 2, "err%04x", rc);
 309                 /* fall back to alternative mechanism: */
 310         }
 311
 312         if (!IS_OSN(card)) {
 313                 rc = qeth_setadpparms_change_macaddr(card);
 314                 if (!rc)
 315                         goto out;
 316                 QETH_DBF_MESSAGE(2, "READ_MAC Assist failed on device %x: %#x\n",
 317                                  CARD_DEVID(card), rc);
 318                 QETH_CARD_TEXT_(card, 2, "1err%04x", rc);
 319                 /* fall back once more: */
 320         }
 321
 322         /* some devices don't support a custom MAC address: */
 323         if (IS_OSM(card) || IS_OSX(card))
 324                 return (rc) ? rc : -EADDRNOTAVAIL;
 325         eth_hw_addr_random(card->dev);
 326
 327 out:
 328         QETH_CARD_HEX(card, 2, card->dev->dev_addr, card->dev->addr_len);
 329         return 0;
 330 }
 331
 332 static void qeth_l2_register_dev_addr(struct qeth_card *card)
 333 {
 334         if (!is_valid_ether_addr(card->dev->dev_addr))
 335                 qeth_l2_request_initial_mac(card);
 336
 337         if (!IS_OSN(card) && !qeth_l2_send_setmac(card, card->dev->dev_addr))
 338                 card->info.dev_addr_is_registered = 1;
 339         else
 340                 card->info.dev_addr_is_registered = 0;
 341 }
 342
 343 static int qeth_l2_validate_addr(struct net_device *dev)
 344 {
 345         struct qeth_card *card = dev->ml_priv;
 346
 347         if (card->info.dev_addr_is_registered)
 348                 return eth_validate_addr(dev);
 349
 350         QETH_CARD_TEXT(card, 4, "nomacadr");
 351         return -EPERM;
 352 }
 353
 354 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 355 {
 356         struct sockaddr *addr = p;
 357         struct qeth_card *card = dev->ml_priv;
 358         u8 old_addr[ETH_ALEN];
 359         int rc = 0;
 360
 361         QETH_CARD_TEXT(card, 3, "setmac");
 362
 363         if (IS_OSM(card) || IS_OSX(card)) {
 364                 QETH_CARD_TEXT(card, 3, "setmcTYP");
 365                 return -EOPNOTSUPP;
 366         }
 367         QETH_CARD_HEX(card, 3, addr->sa_data, ETH_ALEN);
 368         if (!is_valid_ether_addr(addr->sa_data))
 369                 return -EADDRNOTAVAIL;
 370
 371         /* don't register the same address twice */
 372         if (ether_addr_equal_64bits(dev->dev_addr, addr->sa_data) &&
 373             card->info.dev_addr_is_registered)
 374                 return 0;
 375
 376         /* add the new address, switch over, drop the old */
 377         rc = qeth_l2_send_setmac(card, addr->sa_data);
 378         if (rc)
 379                 return rc;
 380         ether_addr_copy(old_addr, dev->dev_addr);
 381         ether_addr_copy(dev->dev_addr, addr->sa_data);
 382
 383         if (card->info.dev_addr_is_registered)
 384                 qeth_l2_remove_mac(card, old_addr);
 385         card->info.dev_addr_is_registered = 1;
 386         return 0;
 387 }
 388
 389 static void qeth_l2_promisc_to_bridge(struct qeth_card *card, bool enable)
 390 {
 391         int role;
 392         int rc;
 393
 394         QETH_CARD_TEXT(card, 3, "pmisc2br");
 395
 396         if (enable) {
 397                 if (card->options.sbp.reflect_promisc_primary)
 398                         role = QETH_SBP_ROLE_PRIMARY;
 399                 else
 400                         role = QETH_SBP_ROLE_SECONDARY;
 401         } else
 402                 role = QETH_SBP_ROLE_NONE;
 403
 404         rc = qeth_bridgeport_setrole(card, role);
 405         QETH_CARD_TEXT_(card, 2, "bpm%c%04x", enable ? '+' : '-', rc);
 406         if (!rc) {
 407                 card->options.sbp.role = role;
 408                 card->info.promisc_mode = enable;
 409         }
 410 }
 411
 412 static void qeth_l2_set_promisc_mode(struct qeth_card *card)
 413 {
 414         bool enable = card->dev->flags & IFF_PROMISC;
 415
 416         if (card->info.promisc_mode == enable)
 417                 return;
 418
 419         if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE)) {
 420                 qeth_setadp_promisc_mode(card, enable);
 421         } else {
 422                 mutex_lock(&card->sbp_lock);
 423                 if (card->options.sbp.reflect_promisc)
 424                         qeth_l2_promisc_to_bridge(card, enable);
 425                 mutex_unlock(&card->sbp_lock);
 426         }
 427 }
 428
 429 /* New MAC address is added to the hash table and marked to be written on card
 430  * only if there is not in the hash table storage already
 431  *
 432 */
 433 static void qeth_l2_add_mac(struct qeth_card *card, struct netdev_hw_addr *ha)
 434 {
 435         u32 mac_hash = get_unaligned((u32 *)(&ha->addr[2]));
 436         struct qeth_mac *mac;
 437
 438         hash_for_each_possible(card->rx_mode_addrs, mac, hnode, mac_hash) {
 439                 if (ether_addr_equal_64bits(ha->addr, mac->mac_addr)) {
 440                         mac->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
 441                         return;
 442                 }
 443         }
 444
 445         mac = kzalloc(sizeof(struct qeth_mac), GFP_ATOMIC);
 446         if (!mac)
 447                 return;
 448
 449         ether_addr_copy(mac->mac_addr, ha->addr);
 450         mac->disp_flag = QETH_DISP_ADDR_ADD;
 451
 452         hash_add(card->rx_mode_addrs, &mac->hnode, mac_hash);
 453 }
 454
 455 static void qeth_l2_rx_mode_work(struct work_struct *work)
 456 {
 457         struct qeth_card *card = container_of(work, struct qeth_card,
 458                                               rx_mode_work);
 459         struct net_device *dev = card->dev;
 460         struct netdev_hw_addr *ha;
 461         struct qeth_mac *mac;
 462         struct hlist_node *tmp;
 463         int i;
 464         int rc;
 465
 466         QETH_CARD_TEXT(card, 3, "setmulti");
 467
 468         netif_addr_lock_bh(dev);
 469         netdev_for_each_mc_addr(ha, dev)
 470                 qeth_l2_add_mac(card, ha);
 471         netdev_for_each_uc_addr(ha, dev)
 472                 qeth_l2_add_mac(card, ha);
 473         netif_addr_unlock_bh(dev);
 474
 475         hash_for_each_safe(card->rx_mode_addrs, i, tmp, mac, hnode) {
 476                 switch (mac->disp_flag) {
 477                 case QETH_DISP_ADDR_DELETE:
 478                         qeth_l2_remove_mac(card, mac->mac_addr);
 479                         hash_del(&mac->hnode);
 480                         kfree(mac);
 481                         break;
 482                 case QETH_DISP_ADDR_ADD:
 483                         rc = qeth_l2_write_mac(card, mac->mac_addr);
 484                         if (rc) {
 485                                 hash_del(&mac->hnode);
 486                                 kfree(mac);
 487                                 break;
 488                         }
 489                         fallthrough;
 490                 default:
 491                         /* for next call to set_rx_mode(): */
 492                         mac->disp_flag = QETH_DISP_ADDR_DELETE;
 493                 }
 494         }
 495
 496         qeth_l2_set_promisc_mode(card);
 497 }
 498
 499 static int qeth_l2_xmit_osn(struct qeth_card *card, struct sk_buff *skb,
 500                             struct qeth_qdio_out_q *queue)
 501 {
 502         gfp_t gfp = GFP_ATOMIC | (skb_pfmemalloc(skb) ? __GFP_MEMALLOC : 0);
 503         struct qeth_hdr *hdr = (struct qeth_hdr *)skb->data;
 504         addr_t end = (addr_t)(skb->data + sizeof(*hdr));
 505         addr_t start = (addr_t)skb->data;
 506         unsigned int elements = 0;
 507         unsigned int hd_len = 0;
 508         int rc;
 509
 510         if (skb->protocol == htons(ETH_P_IPV6))
 511                 return -EPROTONOSUPPORT;
 512
 513         if (qeth_get_elements_for_range(start, end) > 1) {
 514                 /* Misaligned HW header, move it to its own buffer element. */
 515                 hdr = kmem_cache_alloc(qeth_core_header_cache, gfp);
 516                 if (!hdr)
 517                         return -ENOMEM;
 518                 hd_len = sizeof(*hdr);
 519                 skb_copy_from_linear_data(skb, (char *)hdr, hd_len);
 520                 elements++;
 521         }
 522
 523         elements += qeth_count_elements(skb, hd_len);
 524         if (elements > queue->max_elements) {
 525                 rc = -E2BIG;
 526                 goto out;
 527         }
 528
 529         rc = qeth_do_send_packet(card, queue, skb, hdr, hd_len, hd_len,
 530                                  elements);
 531 out:
 532         if (rc && hd_len)
 533                 kmem_cache_free(qeth_core_header_cache, hdr);
 534         return rc;
 535 }
 536
 537 static netdev_tx_t qeth_l2_hard_start_xmit(struct sk_buff *skb,
 538                                            struct net_device *dev)
 539 {
 540         struct qeth_card *card = dev->ml_priv;
 541         u16 txq = skb_get_queue_mapping(skb);
 542         struct qeth_qdio_out_q *queue;
 543         int rc;
 544
 545         if (!skb_is_gso(skb))
 546                 qdisc_skb_cb(skb)->pkt_len = skb->len;
 547         if (IS_IQD(card))
 548                 txq = qeth_iqd_translate_txq(dev, txq);
 549         queue = card->qdio.out_qs[txq];
 550
 551         if (IS_OSN(card))
 552                 rc = qeth_l2_xmit_osn(card, skb, queue);
 553         else
 554                 rc = qeth_xmit(card, skb, queue, qeth_get_ip_version(skb),
 555                                qeth_l2_fill_header);
 556
 557         if (!rc)
 558                 return NETDEV_TX_OK;
 559
 560         QETH_TXQ_STAT_INC(queue, tx_dropped);
 561         kfree_skb(skb);
 562         return NETDEV_TX_OK;
 563 }
 564
 565 static u16 qeth_l2_select_queue(struct net_device *dev, struct sk_buff *skb,
 566                                 struct net_device *sb_dev)
 567 {
 568         struct qeth_card *card = dev->ml_priv;
 569
 570         if (IS_IQD(card))
 571                 return qeth_iqd_select_queue(dev, skb,
 572                                              qeth_get_ether_cast_type(skb),
 573                                              sb_dev);
 574         if (qeth_uses_tx_prio_queueing(card))
 575                 return qeth_get_priority_queue(card, skb);
 576
 577         return netdev_pick_tx(dev, skb, sb_dev);
 578 }
 579
 580 static void qeth_l2_set_rx_mode(struct net_device *dev)
 581 {
 582         struct qeth_card *card = dev->ml_priv;
 583
 584         schedule_work(&card->rx_mode_work);
 585 }
 586
 587 /**
 588  *      qeth_l2_pnso() - perform network subchannel operation
 589  *      @card: qeth_card structure pointer
 590  *      @oc: Operation Code
 591  *      @cnc: Boolean Change-Notification Control
 592  *      @cb: Callback function will be executed for each element
 593  *              of the address list
 594  *      @priv: Pointer to pass to the callback function.
 595  *
 596  *      Collects network information in a network address list and calls the
 597  *      callback function for every entry in the list. If "change-notification-
 598  *      control" is set, further changes in the address list will be reported
 599  *      via the IPA command.
 600  */
 601 static int qeth_l2_pnso(struct qeth_card *card, u8 oc, int cnc,
 602                         void (*cb)(void *priv, struct chsc_pnso_naid_l2 *entry),
 603                         void *priv)
 604 {
 605         struct ccw_device *ddev = CARD_DDEV(card);
 606         struct chsc_pnso_area *rr;
 607         u32 prev_instance = 0;
 608         int isfirstblock = 1;
 609         int i, size, elems;
 610         int rc;
 611
 612         rr = (struct chsc_pnso_area *)get_zeroed_page(GFP_KERNEL);
 613         if (rr == NULL)
 614                 return -ENOMEM;
 615         do {
 616                 QETH_CARD_TEXT(card, 2, "PNSO");
 617                 /* on the first iteration, naihdr.resume_token will be zero */
 618                 rc = ccw_device_pnso(ddev, rr, oc, rr->naihdr.resume_token,
 619                                      cnc);
 620                 if (rc)
 621                         continue;
 622                 if (cb == NULL)
 623                         continue;
 624
 625                 size = rr->naihdr.naids;
 626                 if (size != sizeof(struct chsc_pnso_naid_l2)) {
 627                         WARN_ON_ONCE(1);
 628                         continue;
 629                 }
 630
 631                 elems = (rr->response.length - sizeof(struct chsc_header) -
 632                          sizeof(struct chsc_pnso_naihdr)) / size;
 633
 634                 if (!isfirstblock && (rr->naihdr.instance != prev_instance)) {
 635                         /* Inform the caller that they need to scrap */
 636                         /* the data that was already reported via cb */
 637                         rc = -EAGAIN;
 638                         break;
 639                 }
 640                 isfirstblock = 0;
 641                 prev_instance = rr->naihdr.instance;
 642                 for (i = 0; i < elems; i++)
 643                         (*cb)(priv, &rr->entries[i]);
 644         } while ((rc == -EBUSY) || (!rc && /* list stored */
 645                    /* resume token is non-zero => list incomplete */
 646                    (rr->naihdr.resume_token.t1 || rr->naihdr.resume_token.t2)));
 647
 648         if (rc)
 649                 QETH_CARD_TEXT_(card, 2, "PNrp%04x", rr->response.code);
 650
 651         free_page((unsigned long)rr);
 652         return rc;
 653 }
 654
 655 static bool qeth_is_my_net_if_token(struct qeth_card *card,
 656                                     struct net_if_token *token)
 657 {
 658         return ((card->info.ddev_devno == token->devnum) &&
 659                 (card->info.cssid == token->cssid) &&
 660                 (card->info.iid == token->iid) &&
 661                 (card->info.ssid == token->ssid) &&
 662                 (card->info.chpid == token->chpid) &&
 663                 (card->info.chid == token->chid));
 664 }
 665
 666 /**
 667  *      qeth_l2_dev2br_fdb_notify() - update fdb of master bridge
 668  *      @card:  qeth_card structure pointer
 669  *      @code:  event bitmask: high order bit 0x80 set to
 670  *                              1 - removal of an object
 671  *                              0 - addition of an object
 672  *                             Object type(s):
 673  *                              0x01 - VLAN, 0x02 - MAC, 0x03 - VLAN and MAC
 674  *      @token: "network token" structure identifying 'physical' location
 675  *              of the target
 676  *      @addr_lnid: structure with MAC address and VLAN ID of the target
 677  */
 678 static void qeth_l2_dev2br_fdb_notify(struct qeth_card *card, u8 code,
 679                                       struct net_if_token *token,
 680                                       struct mac_addr_lnid *addr_lnid)
 681 {
 682         struct switchdev_notifier_fdb_info info;
 683         u8 ntfy_mac[ETH_ALEN];
 684
 685         ether_addr_copy(ntfy_mac, addr_lnid->mac);
 686         /* Ignore VLAN only changes */
 687         if (!(code & IPA_ADDR_CHANGE_CODE_MACADDR))
 688                 return;
 689         /* Ignore mcast entries */
 690         if (is_multicast_ether_addr(ntfy_mac))
 691                 return;
 692         /* Ignore my own addresses */
 693         if (qeth_is_my_net_if_token(card, token))
 694                 return;
 695
 696         info.addr = ntfy_mac;
 697         /* don't report VLAN IDs */
 698         info.vid = 0;
 699         info.added_by_user = false;
 700         info.offloaded = true;
 701
 702         if (code & IPA_ADDR_CHANGE_CODE_REMOVAL) {
 703                 call_switchdev_notifiers(SWITCHDEV_FDB_DEL_TO_BRIDGE,
 704                                          card->dev, &info.info, NULL);
 705                 QETH_CARD_TEXT(card, 4, "andelmac");
 706                 QETH_CARD_TEXT_(card, 4,
 707                                 "mc%012lx", ether_addr_to_u64(ntfy_mac));
 708         } else {
 709                 call_switchdev_notifiers(SWITCHDEV_FDB_ADD_TO_BRIDGE,
 710                                          card->dev, &info.info, NULL);
 711                 QETH_CARD_TEXT(card, 4, "anaddmac");
 712                 QETH_CARD_TEXT_(card, 4,
 713                                 "mc%012lx", ether_addr_to_u64(ntfy_mac));
 714         }
 715 }
 716
 717 static void qeth_l2_dev2br_an_set_cb(void *priv,
 718                                      struct chsc_pnso_naid_l2 *entry)
 719 {
 720         u8 code = IPA_ADDR_CHANGE_CODE_MACADDR;
 721         struct qeth_card *card = priv;
 722
 723         if (entry->addr_lnid.lnid < VLAN_N_VID)
 724                 code |= IPA_ADDR_CHANGE_CODE_VLANID;
 725         qeth_l2_dev2br_fdb_notify(card, code,
 726                                   (struct net_if_token *)&entry->nit,
 727                                   (struct mac_addr_lnid *)&entry->addr_lnid);
 728 }
 729
 730 /**
 731  *      qeth_l2_dev2br_an_set() -
 732  *      Enable or disable 'dev to bridge network address notification'
 733  *      @card: qeth_card structure pointer
 734  *      @enable: Enable or disable 'dev to bridge network address notification'
 735  *
 736  *      Returns negative errno-compatible error indication or 0 on success.
 737  *
 738  *      On enable, emits a series of address notifications for all
 739  *      currently registered hosts.
 740  */
 741 static int qeth_l2_dev2br_an_set(struct qeth_card *card, bool enable)
 742 {
 743         int rc;
 744
 745         if (enable) {
 746                 QETH_CARD_TEXT(card, 2, "anseton");
 747                 rc = qeth_l2_pnso(card, PNSO_OC_NET_ADDR_INFO, 1,
 748                                   qeth_l2_dev2br_an_set_cb, card);
 749                 if (rc == -EAGAIN)
 750                         /* address notification enabled, but inconsistent
 751                          * addresses reported -> disable address notification
 752                          */
 753                         qeth_l2_pnso(card, PNSO_OC_NET_ADDR_INFO, 0,
 754                                      NULL, NULL);
 755         } else {
 756                 QETH_CARD_TEXT(card, 2, "ansetoff");
 757                 rc = qeth_l2_pnso(card, PNSO_OC_NET_ADDR_INFO, 0, NULL, NULL);
 758         }
 759
 760         return rc;
 761 }
 762
 763 static int qeth_l2_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
 764                                   struct net_device *dev, u32 filter_mask,
 765                                   int nlflags)
 766 {
 767         struct qeth_priv *priv = netdev_priv(dev);
 768         struct qeth_card *card = dev->ml_priv;
 769         u16 mode = BRIDGE_MODE_UNDEF;
 770
 771         /* Do not even show qeth devs that cannot do bridge_setlink */
 772         if (!priv->brport_hw_features || !netif_device_present(dev) ||
 773             qeth_bridgeport_is_in_use(card))
 774                 return -EOPNOTSUPP;
 775
 776         return ndo_dflt_bridge_getlink(skb, pid, seq, dev,
 777                                        mode, priv->brport_features,
 778                                        priv->brport_hw_features,
 779                                        nlflags, filter_mask, NULL);
 780 }
 781
 782 static const struct nla_policy qeth_brport_policy[IFLA_BRPORT_MAX + 1] = {
 783         [IFLA_BRPORT_LEARNING_SYNC]     = { .type = NLA_U8 },
 784 };
 785
 786 /**
 787  *      qeth_l2_bridge_setlink() - set bridgeport attributes
 788  *      @dev: netdevice
 789  *      @nlh: netlink message header
 790  *      @flags: bridge flags (here: BRIDGE_FLAGS_SELF)
 791  *      @extack: extended ACK report struct
 792  *
 793  *      Called under rtnl_lock
 794  */
 795 static int qeth_l2_bridge_setlink(struct net_device *dev, struct nlmsghdr *nlh,
 796                                   u16 flags, struct netlink_ext_ack *extack)
 797 {
 798         struct qeth_priv *priv = netdev_priv(dev);
 799         struct nlattr *bp_tb[IFLA_BRPORT_MAX + 1];
 800         struct qeth_card *card = dev->ml_priv;
 801         struct nlattr *attr, *nested_attr;
 802         bool enable, has_protinfo = false;
 803         int rem1, rem2;
 804         int rc;
 805
 806         if (!netif_device_present(dev))
 807                 return -ENODEV;
 808         if (!(priv->brport_hw_features))
 809                 return -EOPNOTSUPP;
 810
 811         nlmsg_for_each_attr(attr, nlh, sizeof(struct ifinfomsg), rem1) {
 812                 if (nla_type(attr) == IFLA_PROTINFO) {
 813                         rc = nla_parse_nested(bp_tb, IFLA_BRPORT_MAX, attr,
 814                                               qeth_brport_policy, extack);
 815                         if (rc)
 816                                 return rc;
 817                         has_protinfo = true;
 818                 } else if (nla_type(attr) == IFLA_AF_SPEC) {
 819                         nla_for_each_nested(nested_attr, attr, rem2) {
 820                                 if (nla_type(nested_attr) == IFLA_BRIDGE_FLAGS)
 821                                         continue;
 822                                 NL_SET_ERR_MSG_ATTR(extack, nested_attr,
 823                                                     "Unsupported attribute");
 824                                 return -EINVAL;
 825                         }
 826                 } else {
 827                         NL_SET_ERR_MSG_ATTR(extack, attr, "Unsupported attribute");
 828                         return -EINVAL;
 829                 }
 830         }
 831         if (!has_protinfo)
 832                 return 0;
 833         if (!bp_tb[IFLA_BRPORT_LEARNING_SYNC])
 834                 return -EINVAL;
 835         enable = !!nla_get_u8(bp_tb[IFLA_BRPORT_LEARNING_SYNC]);
 836
 837         if (enable == !!(priv->brport_features & BR_LEARNING_SYNC))
 838                 return 0;
 839
 840         mutex_lock(&card->sbp_lock);
 841         /* do not change anything if BridgePort is enabled */
 842         if (qeth_bridgeport_is_in_use(card)) {
 843                 NL_SET_ERR_MSG(extack, "n/a (BridgePort)");
 844                 rc = -EBUSY;
 845         } else if (enable) {
 846                 qeth_l2_set_pnso_mode(card, QETH_PNSO_ADDR_INFO);
 847                 rc = qeth_l2_dev2br_an_set(card, true);
 848                 if (rc)
 849                         qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
 850                 else
 851                         priv->brport_features |= BR_LEARNING_SYNC;
 852         } else {
 853                 rc = qeth_l2_dev2br_an_set(card, false);
 854                 if (!rc) {
 855                         qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
 856                         priv->brport_features ^= BR_LEARNING_SYNC;
 857                         qeth_l2_dev2br_fdb_flush(card);
 858                 }
 859         }
 860         mutex_unlock(&card->sbp_lock);
 861
 862         return rc;
 863 }
 864
 865 static const struct net_device_ops qeth_l2_netdev_ops = {
 866         .ndo_open               = qeth_open,
 867         .ndo_stop               = qeth_stop,
 868         .ndo_get_stats64        = qeth_get_stats64,
 869         .ndo_start_xmit         = qeth_l2_hard_start_xmit,
 870         .ndo_features_check     = qeth_features_check,
 871         .ndo_select_queue       = qeth_l2_select_queue,
 872         .ndo_validate_addr      = qeth_l2_validate_addr,
 873         .ndo_set_rx_mode        = qeth_l2_set_rx_mode,
 874         .ndo_do_ioctl           = qeth_do_ioctl,
 875         .ndo_set_mac_address    = qeth_l2_set_mac_address,
 876         .ndo_vlan_rx_add_vid    = qeth_l2_vlan_rx_add_vid,
 877         .ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,
 878         .ndo_tx_timeout         = qeth_tx_timeout,
 879         .ndo_fix_features       = qeth_fix_features,
 880         .ndo_set_features       = qeth_set_features,
 881         .ndo_bridge_getlink     = qeth_l2_bridge_getlink,
 882         .ndo_bridge_setlink     = qeth_l2_bridge_setlink,
 883 };
 884
 885 static const struct net_device_ops qeth_osn_netdev_ops = {
 886         .ndo_open               = qeth_open,
 887         .ndo_stop               = qeth_stop,
 888         .ndo_get_stats64        = qeth_get_stats64,
 889         .ndo_start_xmit         = qeth_l2_hard_start_xmit,
 890         .ndo_validate_addr      = eth_validate_addr,
 891         .ndo_tx_timeout         = qeth_tx_timeout,
 892 };
 893
 894 static int qeth_l2_setup_netdev(struct qeth_card *card)
 895 {
 896         if (IS_OSN(card)) {
 897                 card->dev->netdev_ops = &qeth_osn_netdev_ops;
 898                 card->dev->flags |= IFF_NOARP;
 899                 goto add_napi;
 900         }
 901
 902         card->dev->needed_headroom = sizeof(struct qeth_hdr);
 903         card->dev->netdev_ops = &qeth_l2_netdev_ops;
 904         card->dev->priv_flags |= IFF_UNICAST_FLT;
 905
 906         if (IS_OSM(card)) {
 907                 card->dev->features |= NETIF_F_VLAN_CHALLENGED;
 908         } else {
 909                 if (!IS_VM_NIC(card))
 910                         card->dev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
 911                 card->dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
 912         }
 913
 914         if (IS_OSD(card) && !IS_VM_NIC(card)) {
 915                 card->dev->features |= NETIF_F_SG;
 916                 /* OSA 3S and earlier has no RX/TX support */
 917                 if (qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM)) {
 918                         card->dev->hw_features |= NETIF_F_IP_CSUM;
 919                         card->dev->vlan_features |= NETIF_F_IP_CSUM;
 920                 }
 921         }
 922         if (qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) {
 923                 card->dev->hw_features |= NETIF_F_IPV6_CSUM;
 924                 card->dev->vlan_features |= NETIF_F_IPV6_CSUM;
 925         }
 926         if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM) ||
 927             qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6)) {
 928                 card->dev->hw_features |= NETIF_F_RXCSUM;
 929                 card->dev->vlan_features |= NETIF_F_RXCSUM;
 930         }
 931         if (qeth_is_supported(card, IPA_OUTBOUND_TSO)) {
 932                 card->dev->hw_features |= NETIF_F_TSO;
 933                 card->dev->vlan_features |= NETIF_F_TSO;
 934         }
 935         if (qeth_is_supported6(card, IPA_OUTBOUND_TSO)) {
 936                 card->dev->hw_features |= NETIF_F_TSO6;
 937                 card->dev->vlan_features |= NETIF_F_TSO6;
 938         }
 939
 940         if (card->dev->hw_features & (NETIF_F_TSO | NETIF_F_TSO6)) {
 941                 card->dev->needed_headroom = sizeof(struct qeth_hdr_tso);
 942                 netif_keep_dst(card->dev);
 943                 netif_set_gso_max_size(card->dev,
 944                                        PAGE_SIZE * (QDIO_MAX_ELEMENTS_PER_BUFFER - 1));
 945         }
 946
 947 add_napi:
 948         netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT);
 949         return register_netdev(card->dev);
 950 }
 951
 952 static void qeth_l2_trace_features(struct qeth_card *card)
 953 {
 954         /* Set BridgePort features */
 955         QETH_CARD_TEXT(card, 2, "featuSBP");
 956         QETH_CARD_HEX(card, 2, &card->options.sbp.supported_funcs,
 957                       sizeof(card->options.sbp.supported_funcs));
 958         /* VNIC Characteristics features */
 959         QETH_CARD_TEXT(card, 2, "feaVNICC");
 960         QETH_CARD_HEX(card, 2, &card->options.vnicc.sup_chars,
 961                       sizeof(card->options.vnicc.sup_chars));
 962 }
 963
 964 static void qeth_l2_setup_bridgeport_attrs(struct qeth_card *card)
 965 {
 966         if (!card->options.sbp.reflect_promisc &&
 967             card->options.sbp.role != QETH_SBP_ROLE_NONE) {
 968                 /* Conditional to avoid spurious error messages */
 969                 qeth_bridgeport_setrole(card, card->options.sbp.role);
 970                 /* Let the callback function refresh the stored role value. */
 971                 qeth_bridgeport_query_ports(card, &card->options.sbp.role,
 972                                             NULL);
 973         }
 974         if (card->options.sbp.hostnotification) {
 975                 if (qeth_bridgeport_an_set(card, 1))
 976                         card->options.sbp.hostnotification = 0;
 977         }
 978 }
 979
 980 /**
 981  *      qeth_l2_detect_dev2br_support() -
 982  *      Detect whether this card supports 'dev to bridge fdb network address
 983  *      change notification' and thus can support the learning_sync bridgeport
 984  *      attribute
 985  *      @card: qeth_card structure pointer
 986  */
 987 static void qeth_l2_detect_dev2br_support(struct qeth_card *card)
 988 {
 989         struct qeth_priv *priv = netdev_priv(card->dev);
 990         bool dev2br_supported;
 991
 992         QETH_CARD_TEXT(card, 2, "d2brsup");
 993         if (!IS_IQD(card))
 994                 return;
 995
 996         /* dev2br requires valid cssid,iid,chid */
 997         dev2br_supported = card->info.ids_valid &&
 998                            css_general_characteristics.enarf;
 999         QETH_CARD_TEXT_(card, 2, "D2Bsup%02x", dev2br_supported);
1000
1001         if (dev2br_supported)
1002                 priv->brport_hw_features |= BR_LEARNING_SYNC;
1003         else
1004                 priv->brport_hw_features &= ~BR_LEARNING_SYNC;
1005 }
1006
1007 static void qeth_l2_enable_brport_features(struct qeth_card *card)
1008 {
1009         struct qeth_priv *priv = netdev_priv(card->dev);
1010         int rc;
1011
1012         if (priv->brport_features & BR_LEARNING_SYNC) {
1013                 if (priv->brport_hw_features & BR_LEARNING_SYNC) {
1014                         qeth_l2_set_pnso_mode(card, QETH_PNSO_ADDR_INFO);
1015                         rc = qeth_l2_dev2br_an_set(card, true);
1016                         if (rc == -EAGAIN) {
1017                                 /* Recoverable error, retry once */
1018                                 qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
1019                                 qeth_l2_dev2br_fdb_flush(card);
1020                                 qeth_l2_set_pnso_mode(card, QETH_PNSO_ADDR_INFO);
1021                                 rc = qeth_l2_dev2br_an_set(card, true);
1022                         }
1023                         if (rc) {
1024                                 netdev_err(card->dev,
1025                                            "failed to enable bridge learning_sync: %d\n",
1026                                            rc);
1027                                 qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
1028                                 qeth_l2_dev2br_fdb_flush(card);
1029                                 priv->brport_features ^= BR_LEARNING_SYNC;
1030                         }
1031                 } else {
1032                         dev_warn(&card->gdev->dev,
1033                                 "bridge learning_sync not supported\n");
1034                         priv->brport_features ^= BR_LEARNING_SYNC;
1035                 }
1036         }
1037 }
1038
1039 #ifdef CONFIG_QETH_OSN
1040 static void qeth_osn_assist_cb(struct qeth_card *card,
1041                                struct qeth_cmd_buffer *iob,
1042                                unsigned int data_length)
1043 {
1044         qeth_notify_cmd(iob, 0);
1045         qeth_put_cmd(iob);
1046 }
1047
1048 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1049 {
1050         struct qeth_cmd_buffer *iob;
1051         struct qeth_card *card;
1052
1053         if (data_len < 0)
1054                 return -EINVAL;
1055         if (!dev)
1056                 return -ENODEV;
1057         card = dev->ml_priv;
1058         if (!card)
1059                 return -ENODEV;
1060         QETH_CARD_TEXT(card, 2, "osnsdmc");
1061         if (!qeth_card_hw_is_reachable(card))
1062                 return -ENODEV;
1063
1064         iob = qeth_alloc_cmd(&card->write, IPA_PDU_HEADER_SIZE + data_len, 1,
1065                              QETH_IPA_TIMEOUT);
1066         if (!iob)
1067                 return -ENOMEM;
1068
1069         qeth_prepare_ipa_cmd(card, iob, (u16) data_len, NULL);
1070
1071         memcpy(__ipa_cmd(iob), data, data_len);
1072         iob->callback = qeth_osn_assist_cb;
1073         return qeth_send_ipa_cmd(card, iob, NULL, NULL);
1074 }
1075 EXPORT_SYMBOL(qeth_osn_assist);
1076
1077 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1078                   int (*assist_cb)(struct net_device *, void *),
1079                   int (*data_cb)(struct sk_buff *))
1080 {
1081         struct qeth_card *card;
1082         char bus_id[16];
1083         u16 devno;
1084
1085         memcpy(&devno, read_dev_no, 2);
1086         sprintf(bus_id, "0.0.%04x", devno);
1087         card = qeth_get_card_by_busid(bus_id);
1088         if (!card || !IS_OSN(card))
1089                 return -ENODEV;
1090         *dev = card->dev;
1091
1092         QETH_CARD_TEXT(card, 2, "osnreg");
1093         if ((assist_cb == NULL) || (data_cb == NULL))
1094                 return -EINVAL;
1095         card->osn_info.assist_cb = assist_cb;
1096         card->osn_info.data_cb = data_cb;
1097         return 0;
1098 }
1099 EXPORT_SYMBOL(qeth_osn_register);
1100
1101 void qeth_osn_deregister(struct net_device *dev)
1102 {
1103         struct qeth_card *card;
1104
1105         if (!dev)
1106                 return;
1107         card = dev->ml_priv;
1108         if (!card)
1109                 return;
1110         QETH_CARD_TEXT(card, 2, "osndereg");
1111         card->osn_info.assist_cb = NULL;
1112         card->osn_info.data_cb = NULL;
1113 }
1114 EXPORT_SYMBOL(qeth_osn_deregister);
1115 #endif
1116
1117 /* SETBRIDGEPORT support, async notifications */
1118
1119 enum qeth_an_event_type {anev_reg_unreg, anev_abort, anev_reset};
1120
1121 /**
1122  * qeth_bridge_emit_host_event() - bridgeport address change notification
1123  * @card:  qeth_card structure pointer, for udev events.
1124  * @evtype:  "normal" register/unregister, or abort, or reset. For abort
1125  *            and reset token and addr_lnid are unused and may be NULL.
1126  * @code:  event bitmask: high order bit 0x80 value 1 means removal of an
1127  *                        object, 0 - addition of an object.
1128  *                        0x01 - VLAN, 0x02 - MAC, 0x03 - VLAN and MAC.
1129  * @token: "network token" structure identifying physical address of the port.
1130  * @addr_lnid: pointer to structure with MAC address and VLAN ID.
1131  *
1132  * This function is called when registrations and deregistrations are
1133  * reported by the hardware, and also when notifications are enabled -
1134  * for all currently registered addresses.
1135  */
1136 static void qeth_bridge_emit_host_event(struct qeth_card *card,
1137                                         enum qeth_an_event_type evtype,
1138                                         u8 code,
1139                                         struct net_if_token *token,
1140                                         struct mac_addr_lnid *addr_lnid)
1141 {
1142         char str[7][32];
1143         char *env[8];
1144         int i = 0;
1145
1146         switch (evtype) {
1147         case anev_reg_unreg:
1148                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=%s",
1149                                 (code & IPA_ADDR_CHANGE_CODE_REMOVAL)
1150                                 ? "deregister" : "register");
1151                 env[i] = str[i]; i++;
1152                 if (code & IPA_ADDR_CHANGE_CODE_VLANID) {
1153                         snprintf(str[i], sizeof(str[i]), "VLAN=%d",
1154                                 addr_lnid->lnid);
1155                         env[i] = str[i]; i++;
1156                 }
1157                 if (code & IPA_ADDR_CHANGE_CODE_MACADDR) {
1158                         snprintf(str[i], sizeof(str[i]), "MAC=%pM",
1159                                 addr_lnid->mac);
1160                         env[i] = str[i]; i++;
1161                 }
1162                 snprintf(str[i], sizeof(str[i]), "NTOK_BUSID=%x.%x.%04x",
1163                         token->cssid, token->ssid, token->devnum);
1164                 env[i] = str[i]; i++;
1165                 snprintf(str[i], sizeof(str[i]), "NTOK_IID=%02x", token->iid);
1166                 env[i] = str[i]; i++;
1167                 snprintf(str[i], sizeof(str[i]), "NTOK_CHPID=%02x",
1168                                 token->chpid);
1169                 env[i] = str[i]; i++;
1170                 snprintf(str[i], sizeof(str[i]), "NTOK_CHID=%04x", token->chid);
1171                 env[i] = str[i]; i++;
1172                 break;
1173         case anev_abort:
1174                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=abort");
1175                 env[i] = str[i]; i++;
1176                 break;
1177         case anev_reset:
1178                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=reset");
1179                 env[i] = str[i]; i++;
1180                 break;
1181         }
1182         env[i] = NULL;
1183         kobject_uevent_env(&card->gdev->dev.kobj, KOBJ_CHANGE, env);
1184 }
1185
1186 struct qeth_bridge_state_data {
1187         struct work_struct worker;
1188         struct qeth_card *card;
1189         u8 role;
1190         u8 state;
1191 };
1192
1193 static void qeth_bridge_state_change_worker(struct work_struct *work)
1194 {
1195         struct qeth_bridge_state_data *data =
1196                 container_of(work, struct qeth_bridge_state_data, worker);
1197         char env_locrem[32];
1198         char env_role[32];
1199         char env_state[32];
1200         char *env[] = {
1201                 env_locrem,
1202                 env_role,
1203                 env_state,
1204                 NULL
1205         };
1206
1207         snprintf(env_locrem, sizeof(env_locrem), "BRIDGEPORT=statechange");
1208         snprintf(env_role, sizeof(env_role), "ROLE=%s",
1209                 (data->role == QETH_SBP_ROLE_NONE) ? "none" :
1210                 (data->role == QETH_SBP_ROLE_PRIMARY) ? "primary" :
1211                 (data->role == QETH_SBP_ROLE_SECONDARY) ? "secondary" :
1212                 "<INVALID>");
1213         snprintf(env_state, sizeof(env_state), "STATE=%s",
1214                 (data->state == QETH_SBP_STATE_INACTIVE) ? "inactive" :
1215                 (data->state == QETH_SBP_STATE_STANDBY) ? "standby" :
1216                 (data->state == QETH_SBP_STATE_ACTIVE) ? "active" :
1217                 "<INVALID>");
1218         kobject_uevent_env(&data->card->gdev->dev.kobj,
1219                                 KOBJ_CHANGE, env);
1220         kfree(data);
1221 }
1222
1223 static void qeth_bridge_state_change(struct qeth_card *card,
1224                                         struct qeth_ipa_cmd *cmd)
1225 {
1226         struct qeth_sbp_port_data *qports = &cmd->data.sbp.data.port_data;
1227         struct qeth_bridge_state_data *data;
1228
1229         QETH_CARD_TEXT(card, 2, "brstchng");
1230         if (qports->num_entries == 0) {
1231                 QETH_CARD_TEXT(card, 2, "BPempty");
1232                 return;
1233         }
1234         if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1235                 QETH_CARD_TEXT_(card, 2, "BPsz%04x", qports->entry_length);
1236                 return;
1237         }
1238
1239         data = kzalloc(sizeof(*data), GFP_ATOMIC);
1240         if (!data) {
1241                 QETH_CARD_TEXT(card, 2, "BPSalloc");
1242                 return;
1243         }
1244         INIT_WORK(&data->worker, qeth_bridge_state_change_worker);
1245         data->card = card;
1246         /* Information for the local port: */
1247         data->role = qports->entry[0].role;
1248         data->state = qports->entry[0].state;
1249
1250         queue_work(card->event_wq, &data->worker);
1251 }
1252
1253 struct qeth_addr_change_data {
1254         struct delayed_work dwork;
1255         struct qeth_card *card;
1256         struct qeth_ipacmd_addr_change ac_event;
1257 };
1258
1259 static void qeth_l2_dev2br_worker(struct work_struct *work)
1260 {
1261         struct delayed_work *dwork = to_delayed_work(work);
1262         struct qeth_addr_change_data *data;
1263         struct qeth_card *card;
1264         struct qeth_priv *priv;
1265         unsigned int i;
1266         int rc;
1267
1268         data = container_of(dwork, struct qeth_addr_change_data, dwork);
1269         card = data->card;
1270         priv = netdev_priv(card->dev);
1271
1272         QETH_CARD_TEXT(card, 4, "dev2brew");
1273
1274         if (READ_ONCE(card->info.pnso_mode) == QETH_PNSO_NONE)
1275                 goto free;
1276
1277         if (data->ac_event.lost_event_mask) {
1278                 /* Potential re-config in progress, try again later: */
1279                 if (!rtnl_trylock()) {
1280                         queue_delayed_work(card->event_wq, dwork,
1281                                            msecs_to_jiffies(100));
1282                         return;
1283                 }
1284
1285                 if (!netif_device_present(card->dev)) {
1286                         rtnl_unlock();
1287                         goto free;
1288                 }
1289
1290                 QETH_DBF_MESSAGE(3,
1291                                  "Address change notification overflow on device %x\n",
1292                                  CARD_DEVID(card));
1293                 /* Card fdb and bridge fdb are out of sync, card has stopped
1294                  * notifications (no need to drain_workqueue). Purge all
1295                  * 'extern_learn' entries from the parent bridge and restart
1296                  * the notifications.
1297                  */
1298                 qeth_l2_dev2br_fdb_flush(card);
1299                 rc = qeth_l2_dev2br_an_set(card, true);
1300                 if (rc) {
1301                         /* TODO: if we want to retry after -EAGAIN, be
1302                          * aware there could be stale entries in the
1303                          * workqueue now, that need to be drained.
1304                          * For now we give up:
1305                          */
1306                         netdev_err(card->dev,
1307                                    "bridge learning_sync failed to recover: %d\n",
1308                                    rc);
1309                         WRITE_ONCE(card->info.pnso_mode,
1310                                    QETH_PNSO_NONE);
1311                         /* To remove fdb entries reported by an_set: */
1312                         qeth_l2_dev2br_fdb_flush(card);
1313                         priv->brport_features ^= BR_LEARNING_SYNC;
1314                 } else {
1315                         QETH_DBF_MESSAGE(3,
1316                                          "Address Notification resynced on device %x\n",
1317                                          CARD_DEVID(card));
1318                 }
1319
1320                 rtnl_unlock();
1321         } else {
1322                 for (i = 0; i < data->ac_event.num_entries; i++) {
1323                         struct qeth_ipacmd_addr_change_entry *entry =
1324                                         &data->ac_event.entry[i];
1325                         qeth_l2_dev2br_fdb_notify(card,
1326                                                   entry->change_code,
1327                                                   &entry->token,
1328                                                   &entry->addr_lnid);
1329                 }
1330         }
1331
1332 free:
1333         kfree(data);
1334 }
1335
1336 static void qeth_addr_change_event_worker(struct work_struct *work)
1337 {
1338         struct delayed_work *dwork = to_delayed_work(work);
1339         struct qeth_addr_change_data *data;
1340         struct qeth_card *card;
1341         int i;
1342
1343         data = container_of(dwork, struct qeth_addr_change_data, dwork);
1344         card = data->card;
1345
1346         QETH_CARD_TEXT(data->card, 4, "adrchgew");
1347
1348         if (READ_ONCE(card->info.pnso_mode) == QETH_PNSO_NONE)
1349                 goto free;
1350
1351         if (data->ac_event.lost_event_mask) {
1352                 /* Potential re-config in progress, try again later: */
1353                 if (!mutex_trylock(&card->sbp_lock)) {
1354                         queue_delayed_work(card->event_wq, dwork,
1355                                            msecs_to_jiffies(100));
1356                         return;
1357                 }
1358
1359                 dev_info(&data->card->gdev->dev,
1360                          "Address change notification stopped on %s (%s)\n",
1361                          netdev_name(card->dev),
1362                         (data->ac_event.lost_event_mask == 0x01)
1363                         ? "Overflow"
1364                         : (data->ac_event.lost_event_mask == 0x02)
1365                         ? "Bridge port state change"
1366                         : "Unknown reason");
1367
1368                 data->card->options.sbp.hostnotification = 0;
1369                 card->info.pnso_mode = QETH_PNSO_NONE;
1370                 mutex_unlock(&data->card->sbp_lock);
1371                 qeth_bridge_emit_host_event(data->card, anev_abort,
1372                                             0, NULL, NULL);
1373         } else
1374                 for (i = 0; i < data->ac_event.num_entries; i++) {
1375                         struct qeth_ipacmd_addr_change_entry *entry =
1376                                         &data->ac_event.entry[i];
1377                         qeth_bridge_emit_host_event(data->card,
1378                                                     anev_reg_unreg,
1379                                                     entry->change_code,
1380                                                     &entry->token,
1381                                                     &entry->addr_lnid);
1382                 }
1383
1384 free:
1385         kfree(data);
1386 }
1387
1388 static void qeth_addr_change_event(struct qeth_card *card,
1389                                    struct qeth_ipa_cmd *cmd)
1390 {
1391         struct qeth_ipacmd_addr_change *hostevs =
1392                  &cmd->data.addrchange;
1393         struct qeth_addr_change_data *data;
1394         int extrasize;
1395
1396         if (card->info.pnso_mode == QETH_PNSO_NONE)
1397                 return;
1398
1399         QETH_CARD_TEXT(card, 4, "adrchgev");
1400         if (cmd->hdr.return_code != 0x0000) {
1401                 if (cmd->hdr.return_code == 0x0010) {
1402                         if (hostevs->lost_event_mask == 0x00)
1403                                 hostevs->lost_event_mask = 0xff;
1404                 } else {
1405                         QETH_CARD_TEXT_(card, 2, "ACHN%04x",
1406                                 cmd->hdr.return_code);
1407                         return;
1408                 }
1409         }
1410         extrasize = sizeof(struct qeth_ipacmd_addr_change_entry) *
1411                                                 hostevs->num_entries;
1412         data = kzalloc(sizeof(struct qeth_addr_change_data) + extrasize,
1413                        GFP_ATOMIC);
1414         if (!data) {
1415                 QETH_CARD_TEXT(card, 2, "ACNalloc");
1416                 return;
1417         }
1418         if (card->info.pnso_mode == QETH_PNSO_BRIDGEPORT)
1419                 INIT_DELAYED_WORK(&data->dwork, qeth_addr_change_event_worker);
1420         else
1421                 INIT_DELAYED_WORK(&data->dwork, qeth_l2_dev2br_worker);
1422         data->card = card;
1423         memcpy(&data->ac_event, hostevs,
1424                         sizeof(struct qeth_ipacmd_addr_change) + extrasize);
1425         queue_delayed_work(card->event_wq, &data->dwork, 0);
1426 }
1427
1428 /* SETBRIDGEPORT support; sending commands */
1429
1430 struct _qeth_sbp_cbctl {
1431         union {
1432                 u32 supported;
1433                 struct {
1434                         enum qeth_sbp_roles *role;
1435                         enum qeth_sbp_states *state;
1436                 } qports;
1437         } data;
1438 };
1439
1440 static int qeth_bridgeport_makerc(struct qeth_card *card,
1441                                   struct qeth_ipa_cmd *cmd)
1442 {
1443         struct qeth_ipacmd_setbridgeport *sbp = &cmd->data.sbp;
1444         enum qeth_ipa_sbp_cmd setcmd = sbp->hdr.command_code;
1445         u16 ipa_rc = cmd->hdr.return_code;
1446         u16 sbp_rc = sbp->hdr.return_code;
1447         int rc;
1448
1449         if (ipa_rc == IPA_RC_SUCCESS && sbp_rc == IPA_RC_SUCCESS)
1450                 return 0;
1451
1452         if ((IS_IQD(card) && ipa_rc == IPA_RC_SUCCESS) ||
1453             (!IS_IQD(card) && ipa_rc == sbp_rc)) {
1454                 switch (sbp_rc) {
1455                 case IPA_RC_SUCCESS:
1456                         rc = 0;
1457                         break;
1458                 case IPA_RC_L2_UNSUPPORTED_CMD:
1459                 case IPA_RC_UNSUPPORTED_COMMAND:
1460                         rc = -EOPNOTSUPP;
1461                         break;
1462                 case IPA_RC_SBP_OSA_NOT_CONFIGURED:
1463                 case IPA_RC_SBP_IQD_NOT_CONFIGURED:
1464                         rc = -ENODEV; /* maybe not the best code here? */
1465                         dev_err(&card->gdev->dev,
1466         "The device is not configured as a Bridge Port\n");
1467                         break;
1468                 case IPA_RC_SBP_OSA_OS_MISMATCH:
1469                 case IPA_RC_SBP_IQD_OS_MISMATCH:
1470                         rc = -EPERM;
1471                         dev_err(&card->gdev->dev,
1472         "A Bridge Port is already configured by a different operating system\n");
1473                         break;
1474                 case IPA_RC_SBP_OSA_ANO_DEV_PRIMARY:
1475                 case IPA_RC_SBP_IQD_ANO_DEV_PRIMARY:
1476                         switch (setcmd) {
1477                         case IPA_SBP_SET_PRIMARY_BRIDGE_PORT:
1478                                 rc = -EEXIST;
1479                                 dev_err(&card->gdev->dev,
1480         "The LAN already has a primary Bridge Port\n");
1481                                 break;
1482                         case IPA_SBP_SET_SECONDARY_BRIDGE_PORT:
1483                                 rc = -EBUSY;
1484                                 dev_err(&card->gdev->dev,
1485         "The device is already a primary Bridge Port\n");
1486                                 break;
1487                         default:
1488                                 rc = -EIO;
1489                         }
1490                         break;
1491                 case IPA_RC_SBP_OSA_CURRENT_SECOND:
1492                 case IPA_RC_SBP_IQD_CURRENT_SECOND:
1493                         rc = -EBUSY;
1494                         dev_err(&card->gdev->dev,
1495         "The device is already a secondary Bridge Port\n");
1496                         break;
1497                 case IPA_RC_SBP_OSA_LIMIT_SECOND:
1498                 case IPA_RC_SBP_IQD_LIMIT_SECOND:
1499                         rc = -EEXIST;
1500                         dev_err(&card->gdev->dev,
1501         "The LAN cannot have more secondary Bridge Ports\n");
1502                         break;
1503                 case IPA_RC_SBP_OSA_CURRENT_PRIMARY:
1504                 case IPA_RC_SBP_IQD_CURRENT_PRIMARY:
1505                         rc = -EBUSY;
1506                         dev_err(&card->gdev->dev,
1507         "The device is already a primary Bridge Port\n");
1508                         break;
1509                 case IPA_RC_SBP_OSA_NOT_AUTHD_BY_ZMAN:
1510                 case IPA_RC_SBP_IQD_NOT_AUTHD_BY_ZMAN:
1511                         rc = -EACCES;
1512                         dev_err(&card->gdev->dev,
1513         "The device is not authorized to be a Bridge Port\n");
1514                         break;
1515                 default:
1516                         rc = -EIO;
1517                 }
1518         } else {
1519                 switch (ipa_rc) {
1520                 case IPA_RC_NOTSUPP:
1521                         rc = -EOPNOTSUPP;
1522                         break;
1523                 case IPA_RC_UNSUPPORTED_COMMAND:
1524                         rc = -EOPNOTSUPP;
1525                         break;
1526                 default:
1527                         rc = -EIO;
1528                 }
1529         }
1530
1531         if (rc) {
1532                 QETH_CARD_TEXT_(card, 2, "SBPi%04x", ipa_rc);
1533                 QETH_CARD_TEXT_(card, 2, "SBPc%04x", sbp_rc);
1534         }
1535         return rc;
1536 }
1537
1538 static struct qeth_cmd_buffer *qeth_sbp_build_cmd(struct qeth_card *card,
1539                                                   enum qeth_ipa_sbp_cmd sbp_cmd,
1540                                                   unsigned int data_length)
1541 {
1542         enum qeth_ipa_cmds ipa_cmd = IS_IQD(card) ? IPA_CMD_SETBRIDGEPORT_IQD :
1543                                                     IPA_CMD_SETBRIDGEPORT_OSA;
1544         struct qeth_ipacmd_sbp_hdr *hdr;
1545         struct qeth_cmd_buffer *iob;
1546
1547         iob = qeth_ipa_alloc_cmd(card, ipa_cmd, QETH_PROT_NONE,
1548                                  data_length +
1549                                  offsetof(struct qeth_ipacmd_setbridgeport,
1550                                           data));
1551         if (!iob)
1552                 return iob;
1553
1554         hdr = &__ipa_cmd(iob)->data.sbp.hdr;
1555         hdr->cmdlength = sizeof(*hdr) + data_length;
1556         hdr->command_code = sbp_cmd;
1557         hdr->used_total = 1;
1558         hdr->seq_no = 1;
1559         return iob;
1560 }
1561
1562 static int qeth_bridgeport_query_support_cb(struct qeth_card *card,
1563         struct qeth_reply *reply, unsigned long data)
1564 {
1565         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1566         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1567         int rc;
1568
1569         QETH_CARD_TEXT(card, 2, "brqsupcb");
1570         rc = qeth_bridgeport_makerc(card, cmd);
1571         if (rc)
1572                 return rc;
1573
1574         cbctl->data.supported =
1575                 cmd->data.sbp.data.query_cmds_supp.supported_cmds;
1576         return 0;
1577 }
1578
1579 /**
1580  * qeth_bridgeport_query_support() - store bitmask of supported subfunctions.
1581  * @card:                            qeth_card structure pointer.
1582  *
1583  * Sets bitmask of supported setbridgeport subfunctions in the qeth_card
1584  * strucutre: card->options.sbp.supported_funcs.
1585  */
1586 static void qeth_bridgeport_query_support(struct qeth_card *card)
1587 {
1588         struct qeth_cmd_buffer *iob;
1589         struct _qeth_sbp_cbctl cbctl;
1590
1591         QETH_CARD_TEXT(card, 2, "brqsuppo");
1592         iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_COMMANDS_SUPPORTED,
1593                                  SBP_DATA_SIZEOF(query_cmds_supp));
1594         if (!iob)
1595                 return;
1596
1597         if (qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_support_cb,
1598                               &cbctl)) {
1599                 card->options.sbp.role = QETH_SBP_ROLE_NONE;
1600                 card->options.sbp.supported_funcs = 0;
1601                 return;
1602         }
1603         card->options.sbp.supported_funcs = cbctl.data.supported;
1604 }
1605
1606 static int qeth_bridgeport_query_ports_cb(struct qeth_card *card,
1607         struct qeth_reply *reply, unsigned long data)
1608 {
1609         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1610         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1611         struct qeth_sbp_port_data *qports;
1612         int rc;
1613
1614         QETH_CARD_TEXT(card, 2, "brqprtcb");
1615         rc = qeth_bridgeport_makerc(card, cmd);
1616         if (rc)
1617                 return rc;
1618
1619         qports = &cmd->data.sbp.data.port_data;
1620         if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1621                 QETH_CARD_TEXT_(card, 2, "SBPs%04x", qports->entry_length);
1622                 return -EINVAL;
1623         }
1624         /* first entry contains the state of the local port */
1625         if (qports->num_entries > 0) {
1626                 if (cbctl->data.qports.role)
1627                         *cbctl->data.qports.role = qports->entry[0].role;
1628                 if (cbctl->data.qports.state)
1629                         *cbctl->data.qports.state = qports->entry[0].state;
1630         }
1631         return 0;
1632 }
1633
1634 /**
1635  * qeth_bridgeport_query_ports() - query local bridgeport status.
1636  * @card:                          qeth_card structure pointer.
1637  * @role:   Role of the port: 0-none, 1-primary, 2-secondary.
1638  * @state:  State of the port: 0-inactive, 1-standby, 2-active.
1639  *
1640  * Returns negative errno-compatible error indication or 0 on success.
1641  *
1642  * 'role' and 'state' are not updated in case of hardware operation failure.
1643  */
1644 int qeth_bridgeport_query_ports(struct qeth_card *card,
1645         enum qeth_sbp_roles *role, enum qeth_sbp_states *state)
1646 {
1647         struct qeth_cmd_buffer *iob;
1648         struct _qeth_sbp_cbctl cbctl = {
1649                 .data = {
1650                         .qports = {
1651                                 .role = role,
1652                                 .state = state,
1653                         },
1654                 },
1655         };
1656
1657         QETH_CARD_TEXT(card, 2, "brqports");
1658         if (!(card->options.sbp.supported_funcs & IPA_SBP_QUERY_BRIDGE_PORTS))
1659                 return -EOPNOTSUPP;
1660         iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_BRIDGE_PORTS, 0);
1661         if (!iob)
1662                 return -ENOMEM;
1663
1664         return qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_ports_cb,
1665                                  &cbctl);
1666 }
1667
1668 static int qeth_bridgeport_set_cb(struct qeth_card *card,
1669         struct qeth_reply *reply, unsigned long data)
1670 {
1671         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
1672
1673         QETH_CARD_TEXT(card, 2, "brsetrcb");
1674         return qeth_bridgeport_makerc(card, cmd);
1675 }
1676
1677 /**
1678  * qeth_bridgeport_setrole() - Assign primary role to the port.
1679  * @card:                      qeth_card structure pointer.
1680  * @role:                      Role to assign.
1681  *
1682  * Returns negative errno-compatible error indication or 0 on success.
1683  */
1684 int qeth_bridgeport_setrole(struct qeth_card *card, enum qeth_sbp_roles role)
1685 {
1686         struct qeth_cmd_buffer *iob;
1687         enum qeth_ipa_sbp_cmd setcmd;
1688         unsigned int cmdlength = 0;
1689
1690         QETH_CARD_TEXT(card, 2, "brsetrol");
1691         switch (role) {
1692         case QETH_SBP_ROLE_NONE:
1693                 setcmd = IPA_SBP_RESET_BRIDGE_PORT_ROLE;
1694                 break;
1695         case QETH_SBP_ROLE_PRIMARY:
1696                 setcmd = IPA_SBP_SET_PRIMARY_BRIDGE_PORT;
1697                 cmdlength = SBP_DATA_SIZEOF(set_primary);
1698                 break;
1699         case QETH_SBP_ROLE_SECONDARY:
1700                 setcmd = IPA_SBP_SET_SECONDARY_BRIDGE_PORT;
1701                 break;
1702         default:
1703                 return -EINVAL;
1704         }
1705         if (!(card->options.sbp.supported_funcs & setcmd))
1706                 return -EOPNOTSUPP;
1707         iob = qeth_sbp_build_cmd(card, setcmd, cmdlength);
1708         if (!iob)
1709                 return -ENOMEM;
1710
1711         return qeth_send_ipa_cmd(card, iob, qeth_bridgeport_set_cb, NULL);
1712 }
1713
1714 static void qeth_bridgeport_an_set_cb(void *priv,
1715                                       struct chsc_pnso_naid_l2 *entry)
1716 {
1717         struct qeth_card *card = (struct qeth_card *)priv;
1718         u8 code;
1719
1720         code = IPA_ADDR_CHANGE_CODE_MACADDR;
1721         if (entry->addr_lnid.lnid < VLAN_N_VID)
1722                 code |= IPA_ADDR_CHANGE_CODE_VLANID;
1723         qeth_bridge_emit_host_event(card, anev_reg_unreg, code,
1724                                     (struct net_if_token *)&entry->nit,
1725                                     (struct mac_addr_lnid *)&entry->addr_lnid);
1726 }
1727
1728 /**
1729  * qeth_bridgeport_an_set() - Enable or disable bridgeport address notification
1730  * @card:                     qeth_card structure pointer.
1731  * @enable:                   0 - disable, non-zero - enable notifications
1732  *
1733  * Returns negative errno-compatible error indication or 0 on success.
1734  *
1735  * On enable, emits a series of address notifications udev events for all
1736  * currently registered hosts.
1737  */
1738 int qeth_bridgeport_an_set(struct qeth_card *card, int enable)
1739 {
1740         int rc;
1741
1742         if (!card->options.sbp.supported_funcs)
1743                 return -EOPNOTSUPP;
1744
1745         if (enable) {
1746                 qeth_bridge_emit_host_event(card, anev_reset, 0, NULL, NULL);
1747                 qeth_l2_set_pnso_mode(card, QETH_PNSO_BRIDGEPORT);
1748                 rc = qeth_l2_pnso(card, PNSO_OC_NET_BRIDGE_INFO, 1,
1749                                   qeth_bridgeport_an_set_cb, card);
1750                 if (rc)
1751                         qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
1752         } else {
1753                 rc = qeth_l2_pnso(card, PNSO_OC_NET_BRIDGE_INFO, 0, NULL, NULL);
1754                 qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
1755         }
1756         return rc;
1757 }
1758
1759 /* VNIC Characteristics support */
1760
1761 /* handle VNICC IPA command return codes; convert to error codes */
1762 static int qeth_l2_vnicc_makerc(struct qeth_card *card, u16 ipa_rc)
1763 {
1764         int rc;
1765
1766         switch (ipa_rc) {
1767         case IPA_RC_SUCCESS:
1768                 return ipa_rc;
1769         case IPA_RC_L2_UNSUPPORTED_CMD:
1770         case IPA_RC_NOTSUPP:
1771                 rc = -EOPNOTSUPP;
1772                 break;
1773         case IPA_RC_VNICC_OOSEQ:
1774                 rc = -EALREADY;
1775                 break;
1776         case IPA_RC_VNICC_VNICBP:
1777                 rc = -EBUSY;
1778                 break;
1779         case IPA_RC_L2_ADDR_TABLE_FULL:
1780                 rc = -ENOSPC;
1781                 break;
1782         case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
1783                 rc = -EACCES;
1784                 break;
1785         default:
1786                 rc = -EIO;
1787         }
1788
1789         QETH_CARD_TEXT_(card, 2, "err%04x", ipa_rc);
1790         return rc;
1791 }
1792
1793 /* generic VNICC request call back */
1794 static int qeth_l2_vnicc_request_cb(struct qeth_card *card,
1795                                     struct qeth_reply *reply,
1796                                     unsigned long data)
1797 {
1798         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1799         struct qeth_ipacmd_vnicc *rep = &cmd->data.vnicc;
1800         u32 sub_cmd = cmd->data.vnicc.hdr.sub_command;
1801
1802         QETH_CARD_TEXT(card, 2, "vniccrcb");
1803         if (cmd->hdr.return_code)
1804                 return qeth_l2_vnicc_makerc(card, cmd->hdr.return_code);
1805         /* return results to caller */
1806         card->options.vnicc.sup_chars = rep->vnicc_cmds.supported;
1807         card->options.vnicc.cur_chars = rep->vnicc_cmds.enabled;
1808
1809         if (sub_cmd == IPA_VNICC_QUERY_CMDS)
1810                 *(u32 *)reply->param = rep->data.query_cmds.sup_cmds;
1811         else if (sub_cmd == IPA_VNICC_GET_TIMEOUT)
1812                 *(u32 *)reply->param = rep->data.getset_timeout.timeout;
1813
1814         return 0;
1815 }
1816
1817 static struct qeth_cmd_buffer *qeth_l2_vnicc_build_cmd(struct qeth_card *card,
1818                                                        u32 vnicc_cmd,
1819                                                        unsigned int data_length)
1820 {
1821         struct qeth_ipacmd_vnicc_hdr *hdr;
1822         struct qeth_cmd_buffer *iob;
1823
1824         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_VNICC, QETH_PROT_NONE,
1825                                  data_length +
1826                                  offsetof(struct qeth_ipacmd_vnicc, data));
1827         if (!iob)
1828                 return NULL;
1829
1830         hdr = &__ipa_cmd(iob)->data.vnicc.hdr;
1831         hdr->data_length = sizeof(*hdr) + data_length;
1832         hdr->sub_command = vnicc_cmd;
1833         return iob;
1834 }
1835
1836 /* VNICC query VNIC characteristics request */
1837 static int qeth_l2_vnicc_query_chars(struct qeth_card *card)
1838 {
1839         struct qeth_cmd_buffer *iob;
1840
1841         QETH_CARD_TEXT(card, 2, "vniccqch");
1842         iob = qeth_l2_vnicc_build_cmd(card, IPA_VNICC_QUERY_CHARS, 0);
1843         if (!iob)
1844                 return -ENOMEM;
1845
1846         return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, NULL);
1847 }
1848
1849 /* VNICC query sub commands request */
1850 static int qeth_l2_vnicc_query_cmds(struct qeth_card *card, u32 vnic_char,
1851                                     u32 *sup_cmds)
1852 {
1853         struct qeth_cmd_buffer *iob;
1854
1855         QETH_CARD_TEXT(card, 2, "vniccqcm");
1856         iob = qeth_l2_vnicc_build_cmd(card, IPA_VNICC_QUERY_CMDS,
1857                                       VNICC_DATA_SIZEOF(query_cmds));
1858         if (!iob)
1859                 return -ENOMEM;
1860
1861         __ipa_cmd(iob)->data.vnicc.data.query_cmds.vnic_char = vnic_char;
1862
1863         return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, sup_cmds);
1864 }
1865
1866 /* VNICC enable/disable characteristic request */
1867 static int qeth_l2_vnicc_set_char(struct qeth_card *card, u32 vnic_char,
1868                                       u32 cmd)
1869 {
1870         struct qeth_cmd_buffer *iob;
1871
1872         QETH_CARD_TEXT(card, 2, "vniccedc");
1873         iob = qeth_l2_vnicc_build_cmd(card, cmd, VNICC_DATA_SIZEOF(set_char));
1874         if (!iob)
1875                 return -ENOMEM;
1876
1877         __ipa_cmd(iob)->data.vnicc.data.set_char.vnic_char = vnic_char;
1878
1879         return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, NULL);
1880 }
1881
1882 /* VNICC get/set timeout for characteristic request */
1883 static int qeth_l2_vnicc_getset_timeout(struct qeth_card *card, u32 vnicc,
1884                                         u32 cmd, u32 *timeout)
1885 {
1886         struct qeth_vnicc_getset_timeout *getset_timeout;
1887         struct qeth_cmd_buffer *iob;
1888
1889         QETH_CARD_TEXT(card, 2, "vniccgst");
1890         iob = qeth_l2_vnicc_build_cmd(card, cmd,
1891                                       VNICC_DATA_SIZEOF(getset_timeout));
1892         if (!iob)
1893                 return -ENOMEM;
1894
1895         getset_timeout = &__ipa_cmd(iob)->data.vnicc.data.getset_timeout;
1896         getset_timeout->vnic_char = vnicc;
1897
1898         if (cmd == IPA_VNICC_SET_TIMEOUT)
1899                 getset_timeout->timeout = *timeout;
1900
1901         return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, timeout);
1902 }
1903
1904 /* recover user timeout setting */
1905 static bool qeth_l2_vnicc_recover_timeout(struct qeth_card *card, u32 vnicc,
1906                                           u32 *timeout)
1907 {
1908         if (card->options.vnicc.sup_chars & vnicc &&
1909             card->options.vnicc.getset_timeout_sup & vnicc &&
1910             !qeth_l2_vnicc_getset_timeout(card, vnicc, IPA_VNICC_SET_TIMEOUT,
1911                                           timeout))
1912                 return false;
1913         *timeout = QETH_VNICC_DEFAULT_TIMEOUT;
1914         return true;
1915 }
1916
1917 /* set current VNICC flag state; called from sysfs store function */
1918 int qeth_l2_vnicc_set_state(struct qeth_card *card, u32 vnicc, bool state)
1919 {
1920         int rc = 0;
1921         u32 cmd;
1922
1923         QETH_CARD_TEXT(card, 2, "vniccsch");
1924
1925         /* check if characteristic and enable/disable are supported */
1926         if (!(card->options.vnicc.sup_chars & vnicc) ||
1927             !(card->options.vnicc.set_char_sup & vnicc))
1928                 return -EOPNOTSUPP;
1929
1930         if (qeth_bridgeport_is_in_use(card))
1931                 return -EBUSY;
1932
1933         /* set enable/disable command and store wanted characteristic */
1934         if (state) {
1935                 cmd = IPA_VNICC_ENABLE;
1936                 card->options.vnicc.wanted_chars |= vnicc;
1937         } else {
1938                 cmd = IPA_VNICC_DISABLE;
1939                 card->options.vnicc.wanted_chars &= ~vnicc;
1940         }
1941
1942         /* do we need to do anything? */
1943         if (card->options.vnicc.cur_chars == card->options.vnicc.wanted_chars)
1944                 return rc;
1945
1946         /* if card is not ready, simply stop here */
1947         if (!qeth_card_hw_is_reachable(card)) {
1948                 if (state)
1949                         card->options.vnicc.cur_chars |= vnicc;
1950                 else
1951                         card->options.vnicc.cur_chars &= ~vnicc;
1952                 return rc;
1953         }
1954
1955         rc = qeth_l2_vnicc_set_char(card, vnicc, cmd);
1956         if (rc)
1957                 card->options.vnicc.wanted_chars =
1958                         card->options.vnicc.cur_chars;
1959         else {
1960                 /* successful online VNICC change; handle special cases */
1961                 if (state && vnicc == QETH_VNICC_RX_BCAST)
1962                         card->options.vnicc.rx_bcast_enabled = true;
1963                 if (!state && vnicc == QETH_VNICC_LEARNING)
1964                         qeth_l2_vnicc_recover_timeout(card, vnicc,
1965                                         &card->options.vnicc.learning_timeout);
1966         }
1967
1968         return rc;
1969 }
1970
1971 /* get current VNICC flag state; called from sysfs show function */
1972 int qeth_l2_vnicc_get_state(struct qeth_card *card, u32 vnicc, bool *state)
1973 {
1974         int rc = 0;
1975
1976         QETH_CARD_TEXT(card, 2, "vniccgch");
1977
1978         /* check if characteristic is supported */
1979         if (!(card->options.vnicc.sup_chars & vnicc))
1980                 return -EOPNOTSUPP;
1981
1982         if (qeth_bridgeport_is_in_use(card))
1983                 return -EBUSY;
1984
1985         /* if card is ready, query current VNICC state */
1986         if (qeth_card_hw_is_reachable(card))
1987                 rc = qeth_l2_vnicc_query_chars(card);
1988
1989         *state = (card->options.vnicc.cur_chars & vnicc) ? true : false;
1990         return rc;
1991 }
1992
1993 /* set VNICC timeout; called from sysfs store function. Currently, only learning
1994  * supports timeout
1995  */
1996 int qeth_l2_vnicc_set_timeout(struct qeth_card *card, u32 timeout)
1997 {
1998         int rc = 0;
1999
2000         QETH_CARD_TEXT(card, 2, "vniccsto");
2001
2002         /* check if characteristic and set_timeout are supported */
2003         if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
2004             !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
2005                 return -EOPNOTSUPP;
2006
2007         if (qeth_bridgeport_is_in_use(card))
2008                 return -EBUSY;
2009
2010         /* do we need to do anything? */
2011         if (card->options.vnicc.learning_timeout == timeout)
2012                 return rc;
2013
2014         /* if card is not ready, simply store the value internally and return */
2015         if (!qeth_card_hw_is_reachable(card)) {
2016                 card->options.vnicc.learning_timeout = timeout;
2017                 return rc;
2018         }
2019
2020         /* send timeout value to card; if successful, store value internally */
2021         rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
2022                                           IPA_VNICC_SET_TIMEOUT, &timeout);
2023         if (!rc)
2024                 card->options.vnicc.learning_timeout = timeout;
2025
2026         return rc;
2027 }
2028
2029 /* get current VNICC timeout; called from sysfs show function. Currently, only
2030  * learning supports timeout
2031  */
2032 int qeth_l2_vnicc_get_timeout(struct qeth_card *card, u32 *timeout)
2033 {
2034         int rc = 0;
2035
2036         QETH_CARD_TEXT(card, 2, "vniccgto");
2037
2038         /* check if characteristic and get_timeout are supported */
2039         if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
2040             !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
2041                 return -EOPNOTSUPP;
2042
2043         if (qeth_bridgeport_is_in_use(card))
2044                 return -EBUSY;
2045
2046         /* if card is ready, get timeout. Otherwise, just return stored value */
2047         *timeout = card->options.vnicc.learning_timeout;
2048         if (qeth_card_hw_is_reachable(card))
2049                 rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
2050                                                   IPA_VNICC_GET_TIMEOUT,
2051                                                   timeout);
2052
2053         return rc;
2054 }
2055
2056 /* check if VNICC is currently enabled */
2057 static bool _qeth_l2_vnicc_is_in_use(struct qeth_card *card)
2058 {
2059         if (!card->options.vnicc.sup_chars)
2060                 return false;
2061         /* default values are only OK if rx_bcast was not enabled by user
2062          * or the card is offline.
2063          */
2064         if (card->options.vnicc.cur_chars == QETH_VNICC_DEFAULT) {
2065                 if (!card->options.vnicc.rx_bcast_enabled ||
2066                     !qeth_card_hw_is_reachable(card))
2067                         return false;
2068         }
2069         return true;
2070 }
2071
2072 /**
2073  *      qeth_bridgeport_allowed - are any qeth_bridgeport functions allowed?
2074  *      @card: qeth_card structure pointer
2075  *
2076  *      qeth_bridgeport functionality is mutually exclusive with usage of the
2077  *      VNIC Characteristics and dev2br address notifications
2078  */
2079 bool qeth_bridgeport_allowed(struct qeth_card *card)
2080 {
2081         struct qeth_priv *priv = netdev_priv(card->dev);
2082
2083         return (!_qeth_l2_vnicc_is_in_use(card) &&
2084                 !(priv->brport_features & BR_LEARNING_SYNC));
2085 }
2086
2087 /* recover user characteristic setting */
2088 static bool qeth_l2_vnicc_recover_char(struct qeth_card *card, u32 vnicc,
2089                                        bool enable)
2090 {
2091         u32 cmd = enable ? IPA_VNICC_ENABLE : IPA_VNICC_DISABLE;
2092
2093         if (card->options.vnicc.sup_chars & vnicc &&
2094             card->options.vnicc.set_char_sup & vnicc &&
2095             !qeth_l2_vnicc_set_char(card, vnicc, cmd))
2096                 return false;
2097         card->options.vnicc.wanted_chars &= ~vnicc;
2098         card->options.vnicc.wanted_chars |= QETH_VNICC_DEFAULT & vnicc;
2099         return true;
2100 }
2101
2102 /* (re-)initialize VNICC */
2103 static void qeth_l2_vnicc_init(struct qeth_card *card)
2104 {
2105         u32 *timeout = &card->options.vnicc.learning_timeout;
2106         bool enable, error = false;
2107         unsigned int chars_len, i;
2108         unsigned long chars_tmp;
2109         u32 sup_cmds, vnicc;
2110
2111         QETH_CARD_TEXT(card, 2, "vniccini");
2112         /* reset rx_bcast */
2113         card->options.vnicc.rx_bcast_enabled = 0;
2114         /* initial query and storage of VNIC characteristics */
2115         if (qeth_l2_vnicc_query_chars(card)) {
2116                 if (card->options.vnicc.wanted_chars != QETH_VNICC_DEFAULT ||
2117                     *timeout != QETH_VNICC_DEFAULT_TIMEOUT)
2118                         dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
2119                 /* fail quietly if user didn't change the default config */
2120                 card->options.vnicc.sup_chars = 0;
2121                 card->options.vnicc.cur_chars = 0;
2122                 card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
2123                 return;
2124         }
2125         /* get supported commands for each supported characteristic */
2126         chars_tmp = card->options.vnicc.sup_chars;
2127         chars_len = sizeof(card->options.vnicc.sup_chars) * BITS_PER_BYTE;
2128         for_each_set_bit(i, &chars_tmp, chars_len) {
2129                 vnicc = BIT(i);
2130                 if (qeth_l2_vnicc_query_cmds(card, vnicc, &sup_cmds)) {
2131                         sup_cmds = 0;
2132                         error = true;
2133                 }
2134                 if ((sup_cmds & IPA_VNICC_SET_TIMEOUT) &&
2135                     (sup_cmds & IPA_VNICC_GET_TIMEOUT))
2136                         card->options.vnicc.getset_timeout_sup |= vnicc;
2137                 else
2138                         card->options.vnicc.getset_timeout_sup &= ~vnicc;
2139                 if ((sup_cmds & IPA_VNICC_ENABLE) &&
2140                     (sup_cmds & IPA_VNICC_DISABLE))
2141                         card->options.vnicc.set_char_sup |= vnicc;
2142                 else
2143                         card->options.vnicc.set_char_sup &= ~vnicc;
2144         }
2145         /* enforce assumed default values and recover settings, if changed  */
2146         error |= qeth_l2_vnicc_recover_timeout(card, QETH_VNICC_LEARNING,
2147                                                timeout);
2148         /* Change chars, if necessary  */
2149         chars_tmp = card->options.vnicc.wanted_chars ^
2150                     card->options.vnicc.cur_chars;
2151         chars_len = sizeof(card->options.vnicc.wanted_chars) * BITS_PER_BYTE;
2152         for_each_set_bit(i, &chars_tmp, chars_len) {
2153                 vnicc = BIT(i);
2154                 enable = card->options.vnicc.wanted_chars & vnicc;
2155                 error |= qeth_l2_vnicc_recover_char(card, vnicc, enable);
2156         }
2157         if (error)
2158                 dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
2159 }
2160
2161 /* configure default values of VNIC characteristics */
2162 static void qeth_l2_vnicc_set_defaults(struct qeth_card *card)
2163 {
2164         /* characteristics values */
2165         card->options.vnicc.sup_chars = QETH_VNICC_ALL;
2166         card->options.vnicc.cur_chars = QETH_VNICC_DEFAULT;
2167         card->options.vnicc.learning_timeout = QETH_VNICC_DEFAULT_TIMEOUT;
2168         /* supported commands */
2169         card->options.vnicc.set_char_sup = QETH_VNICC_ALL;
2170         card->options.vnicc.getset_timeout_sup = QETH_VNICC_LEARNING;
2171         /* settings wanted by users */
2172         card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
2173 }
2174
2175 static const struct device_type qeth_l2_devtype = {
2176         .name = "qeth_layer2",
2177         .groups = qeth_l2_attr_groups,
2178 };
2179
2180 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
2181 {
2182         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
2183         int rc;
2184
2185         if (IS_OSN(card))
2186                 dev_notice(&gdev->dev, "OSN support will be dropped in 2021\n");
2187
2188         qeth_l2_vnicc_set_defaults(card);
2189         mutex_init(&card->sbp_lock);
2190
2191         if (gdev->dev.type == &qeth_generic_devtype) {
2192                 rc = device_add_groups(&gdev->dev, qeth_l2_attr_groups);
2193                 if (rc)
2194                         return rc;
2195         }
2196
2197         INIT_WORK(&card->rx_mode_work, qeth_l2_rx_mode_work);
2198         return 0;
2199 }
2200
2201 static void qeth_l2_remove_device(struct ccwgroup_device *gdev)
2202 {
2203         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
2204
2205         if (gdev->dev.type == &qeth_generic_devtype)
2206                 device_remove_groups(&gdev->dev, qeth_l2_attr_groups);
2207         qeth_set_allowed_threads(card, 0, 1);
2208         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
2209
2210         if (gdev->state == CCWGROUP_ONLINE)
2211                 qeth_set_offline(card, false);
2212
2213         cancel_work_sync(&card->close_dev_work);
2214         if (card->dev->reg_state == NETREG_REGISTERED)
2215                 unregister_netdev(card->dev);
2216 }
2217
2218 static int qeth_l2_set_online(struct qeth_card *card, bool carrier_ok)
2219 {
2220         struct net_device *dev = card->dev;
2221         int rc = 0;
2222
2223         qeth_l2_detect_dev2br_support(card);
2224
2225         mutex_lock(&card->sbp_lock);
2226         qeth_bridgeport_query_support(card);
2227         if (card->options.sbp.supported_funcs) {
2228                 qeth_l2_setup_bridgeport_attrs(card);
2229                 dev_info(&card->gdev->dev,
2230                          "The device represents a Bridge Capable Port\n");
2231         }
2232         mutex_unlock(&card->sbp_lock);
2233
2234         qeth_l2_register_dev_addr(card);
2235
2236         /* for the rx_bcast characteristic, init VNICC after setmac */
2237         qeth_l2_vnicc_init(card);
2238
2239         qeth_l2_trace_features(card);
2240
2241         /* softsetup */
2242         QETH_CARD_TEXT(card, 2, "softsetp");
2243
2244         card->state = CARD_STATE_SOFTSETUP;
2245
2246         qeth_set_allowed_threads(card, 0xffffffff, 0);
2247
2248         if (dev->reg_state != NETREG_REGISTERED) {
2249                 rc = qeth_l2_setup_netdev(card);
2250                 if (rc)
2251                         goto err_setup;
2252
2253                 if (carrier_ok)
2254                         netif_carrier_on(dev);
2255         } else {
2256                 rtnl_lock();
2257                 rc = qeth_set_real_num_tx_queues(card,
2258                                                  qeth_tx_actual_queues(card));
2259                 if (rc) {
2260                         rtnl_unlock();
2261                         goto err_set_queues;
2262                 }
2263
2264                 if (carrier_ok)
2265                         netif_carrier_on(dev);
2266                 else
2267                         netif_carrier_off(dev);
2268
2269                 netif_device_attach(dev);
2270                 qeth_enable_hw_features(dev);
2271                 qeth_l2_enable_brport_features(card);
2272
2273                 if (card->info.open_when_online) {
2274                         card->info.open_when_online = 0;
2275                         dev_open(dev, NULL);
2276                 }
2277                 rtnl_unlock();
2278         }
2279         return 0;
2280
2281 err_set_queues:
2282 err_setup:
2283         qeth_set_allowed_threads(card, 0, 1);
2284         card->state = CARD_STATE_DOWN;
2285         return rc;
2286 }
2287
2288 static void qeth_l2_set_offline(struct qeth_card *card)
2289 {
2290         struct qeth_priv *priv = netdev_priv(card->dev);
2291
2292         qeth_set_allowed_threads(card, 0, 1);
2293         qeth_l2_drain_rx_mode_cache(card);
2294
2295         if (card->state == CARD_STATE_SOFTSETUP)
2296                 card->state = CARD_STATE_DOWN;
2297
2298         qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
2299         if (priv->brport_features & BR_LEARNING_SYNC)
2300                 qeth_l2_dev2br_fdb_flush(card);
2301 }
2302
2303 /* Returns zero if the command is successfully "consumed" */
2304 static int qeth_l2_control_event(struct qeth_card *card,
2305                                  struct qeth_ipa_cmd *cmd)
2306 {
2307         switch (cmd->hdr.command) {
2308         case IPA_CMD_SETBRIDGEPORT_OSA:
2309         case IPA_CMD_SETBRIDGEPORT_IQD:
2310                 if (cmd->data.sbp.hdr.command_code ==
2311                     IPA_SBP_BRIDGE_PORT_STATE_CHANGE) {
2312                         qeth_bridge_state_change(card, cmd);
2313                         return 0;
2314                 }
2315
2316                 return 1;
2317         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
2318                 qeth_addr_change_event(card, cmd);
2319                 return 0;
2320         default:
2321                 return 1;
2322         }
2323 }
2324
2325 const struct qeth_discipline qeth_l2_discipline = {
2326         .devtype = &qeth_l2_devtype,
2327         .setup = qeth_l2_probe_device,
2328         .remove = qeth_l2_remove_device,
2329         .set_online = qeth_l2_set_online,
2330         .set_offline = qeth_l2_set_offline,
2331         .do_ioctl = NULL,
2332         .control_event_handler = qeth_l2_control_event,
2333 };
2334 EXPORT_SYMBOL_GPL(qeth_l2_discipline);
2335
2336 static int __init qeth_l2_init(void)
2337 {
2338         pr_info("register layer 2 discipline\n");
2339         return 0;
2340 }
2341
2342 static void __exit qeth_l2_exit(void)
2343 {
2344         pr_info("unregister layer 2 discipline\n");
2345 }
2346
2347 module_init(qeth_l2_init);
2348 module_exit(qeth_l2_exit);
2349 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
2350 MODULE_DESCRIPTION("qeth layer 2 discipline");
2351 MODULE_LICENSE("GPL");