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  *      This is a destructive test and must be called before dev2br or
 988  *      bridgeport address notification is enabled!
 989  */
 990 static void qeth_l2_detect_dev2br_support(struct qeth_card *card)
 991 {
 992         struct qeth_priv *priv = netdev_priv(card->dev);
 993         bool dev2br_supported;
 994         int rc;
 995
 996         QETH_CARD_TEXT(card, 2, "d2brsup");
 997         if (!IS_IQD(card))
 998                 return;
 999
1000         /* dev2br requires valid cssid,iid,chid */
1001         if (!card->info.ids_valid) {
1002                 dev2br_supported = false;
1003         } else if (css_general_characteristics.enarf) {
1004                 dev2br_supported = true;
1005         } else {
1006                 /* Old machines don't have the feature bit:
1007                  * Probe by testing whether a disable succeeds
1008                  */
1009                 rc = qeth_l2_pnso(card, PNSO_OC_NET_ADDR_INFO, 0, NULL, NULL);
1010                 dev2br_supported = !rc;
1011         }
1012         QETH_CARD_TEXT_(card, 2, "D2Bsup%02x", dev2br_supported);
1013
1014         if (dev2br_supported)
1015                 priv->brport_hw_features |= BR_LEARNING_SYNC;
1016         else
1017                 priv->brport_hw_features &= ~BR_LEARNING_SYNC;
1018 }
1019
1020 static void qeth_l2_enable_brport_features(struct qeth_card *card)
1021 {
1022         struct qeth_priv *priv = netdev_priv(card->dev);
1023         int rc;
1024
1025         if (priv->brport_features & BR_LEARNING_SYNC) {
1026                 if (priv->brport_hw_features & BR_LEARNING_SYNC) {
1027                         qeth_l2_set_pnso_mode(card, QETH_PNSO_ADDR_INFO);
1028                         rc = qeth_l2_dev2br_an_set(card, true);
1029                         if (rc == -EAGAIN) {
1030                                 /* Recoverable error, retry once */
1031                                 qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
1032                                 qeth_l2_dev2br_fdb_flush(card);
1033                                 qeth_l2_set_pnso_mode(card, QETH_PNSO_ADDR_INFO);
1034                                 rc = qeth_l2_dev2br_an_set(card, true);
1035                         }
1036                         if (rc) {
1037                                 netdev_err(card->dev,
1038                                            "failed to enable bridge learning_sync: %d\n",
1039                                            rc);
1040                                 qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
1041                                 qeth_l2_dev2br_fdb_flush(card);
1042                                 priv->brport_features ^= BR_LEARNING_SYNC;
1043                         }
1044                 } else {
1045                         dev_warn(&card->gdev->dev,
1046                                 "bridge learning_sync not supported\n");
1047                         priv->brport_features ^= BR_LEARNING_SYNC;
1048                 }
1049         }
1050 }
1051
1052 #ifdef CONFIG_QETH_OSN
1053 static void qeth_osn_assist_cb(struct qeth_card *card,
1054                                struct qeth_cmd_buffer *iob,
1055                                unsigned int data_length)
1056 {
1057         qeth_notify_cmd(iob, 0);
1058         qeth_put_cmd(iob);
1059 }
1060
1061 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1062 {
1063         struct qeth_cmd_buffer *iob;
1064         struct qeth_card *card;
1065
1066         if (data_len < 0)
1067                 return -EINVAL;
1068         if (!dev)
1069                 return -ENODEV;
1070         card = dev->ml_priv;
1071         if (!card)
1072                 return -ENODEV;
1073         QETH_CARD_TEXT(card, 2, "osnsdmc");
1074         if (!qeth_card_hw_is_reachable(card))
1075                 return -ENODEV;
1076
1077         iob = qeth_alloc_cmd(&card->write, IPA_PDU_HEADER_SIZE + data_len, 1,
1078                              QETH_IPA_TIMEOUT);
1079         if (!iob)
1080                 return -ENOMEM;
1081
1082         qeth_prepare_ipa_cmd(card, iob, (u16) data_len, NULL);
1083
1084         memcpy(__ipa_cmd(iob), data, data_len);
1085         iob->callback = qeth_osn_assist_cb;
1086         return qeth_send_ipa_cmd(card, iob, NULL, NULL);
1087 }
1088 EXPORT_SYMBOL(qeth_osn_assist);
1089
1090 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1091                   int (*assist_cb)(struct net_device *, void *),
1092                   int (*data_cb)(struct sk_buff *))
1093 {
1094         struct qeth_card *card;
1095         char bus_id[16];
1096         u16 devno;
1097
1098         memcpy(&devno, read_dev_no, 2);
1099         sprintf(bus_id, "0.0.%04x", devno);
1100         card = qeth_get_card_by_busid(bus_id);
1101         if (!card || !IS_OSN(card))
1102                 return -ENODEV;
1103         *dev = card->dev;
1104
1105         QETH_CARD_TEXT(card, 2, "osnreg");
1106         if ((assist_cb == NULL) || (data_cb == NULL))
1107                 return -EINVAL;
1108         card->osn_info.assist_cb = assist_cb;
1109         card->osn_info.data_cb = data_cb;
1110         return 0;
1111 }
1112 EXPORT_SYMBOL(qeth_osn_register);
1113
1114 void qeth_osn_deregister(struct net_device *dev)
1115 {
1116         struct qeth_card *card;
1117
1118         if (!dev)
1119                 return;
1120         card = dev->ml_priv;
1121         if (!card)
1122                 return;
1123         QETH_CARD_TEXT(card, 2, "osndereg");
1124         card->osn_info.assist_cb = NULL;
1125         card->osn_info.data_cb = NULL;
1126 }
1127 EXPORT_SYMBOL(qeth_osn_deregister);
1128 #endif
1129
1130 /* SETBRIDGEPORT support, async notifications */
1131
1132 enum qeth_an_event_type {anev_reg_unreg, anev_abort, anev_reset};
1133
1134 /**
1135  * qeth_bridge_emit_host_event() - bridgeport address change notification
1136  * @card:  qeth_card structure pointer, for udev events.
1137  * @evtype:  "normal" register/unregister, or abort, or reset. For abort
1138  *            and reset token and addr_lnid are unused and may be NULL.
1139  * @code:  event bitmask: high order bit 0x80 value 1 means removal of an
1140  *                        object, 0 - addition of an object.
1141  *                        0x01 - VLAN, 0x02 - MAC, 0x03 - VLAN and MAC.
1142  * @token: "network token" structure identifying physical address of the port.
1143  * @addr_lnid: pointer to structure with MAC address and VLAN ID.
1144  *
1145  * This function is called when registrations and deregistrations are
1146  * reported by the hardware, and also when notifications are enabled -
1147  * for all currently registered addresses.
1148  */
1149 static void qeth_bridge_emit_host_event(struct qeth_card *card,
1150                                         enum qeth_an_event_type evtype,
1151                                         u8 code,
1152                                         struct net_if_token *token,
1153                                         struct mac_addr_lnid *addr_lnid)
1154 {
1155         char str[7][32];
1156         char *env[8];
1157         int i = 0;
1158
1159         switch (evtype) {
1160         case anev_reg_unreg:
1161                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=%s",
1162                                 (code & IPA_ADDR_CHANGE_CODE_REMOVAL)
1163                                 ? "deregister" : "register");
1164                 env[i] = str[i]; i++;
1165                 if (code & IPA_ADDR_CHANGE_CODE_VLANID) {
1166                         snprintf(str[i], sizeof(str[i]), "VLAN=%d",
1167                                 addr_lnid->lnid);
1168                         env[i] = str[i]; i++;
1169                 }
1170                 if (code & IPA_ADDR_CHANGE_CODE_MACADDR) {
1171                         snprintf(str[i], sizeof(str[i]), "MAC=%pM",
1172                                 addr_lnid->mac);
1173                         env[i] = str[i]; i++;
1174                 }
1175                 snprintf(str[i], sizeof(str[i]), "NTOK_BUSID=%x.%x.%04x",
1176                         token->cssid, token->ssid, token->devnum);
1177                 env[i] = str[i]; i++;
1178                 snprintf(str[i], sizeof(str[i]), "NTOK_IID=%02x", token->iid);
1179                 env[i] = str[i]; i++;
1180                 snprintf(str[i], sizeof(str[i]), "NTOK_CHPID=%02x",
1181                                 token->chpid);
1182                 env[i] = str[i]; i++;
1183                 snprintf(str[i], sizeof(str[i]), "NTOK_CHID=%04x", token->chid);
1184                 env[i] = str[i]; i++;
1185                 break;
1186         case anev_abort:
1187                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=abort");
1188                 env[i] = str[i]; i++;
1189                 break;
1190         case anev_reset:
1191                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=reset");
1192                 env[i] = str[i]; i++;
1193                 break;
1194         }
1195         env[i] = NULL;
1196         kobject_uevent_env(&card->gdev->dev.kobj, KOBJ_CHANGE, env);
1197 }
1198
1199 struct qeth_bridge_state_data {
1200         struct work_struct worker;
1201         struct qeth_card *card;
1202         u8 role;
1203         u8 state;
1204 };
1205
1206 static void qeth_bridge_state_change_worker(struct work_struct *work)
1207 {
1208         struct qeth_bridge_state_data *data =
1209                 container_of(work, struct qeth_bridge_state_data, worker);
1210         char env_locrem[32];
1211         char env_role[32];
1212         char env_state[32];
1213         char *env[] = {
1214                 env_locrem,
1215                 env_role,
1216                 env_state,
1217                 NULL
1218         };
1219
1220         snprintf(env_locrem, sizeof(env_locrem), "BRIDGEPORT=statechange");
1221         snprintf(env_role, sizeof(env_role), "ROLE=%s",
1222                 (data->role == QETH_SBP_ROLE_NONE) ? "none" :
1223                 (data->role == QETH_SBP_ROLE_PRIMARY) ? "primary" :
1224                 (data->role == QETH_SBP_ROLE_SECONDARY) ? "secondary" :
1225                 "<INVALID>");
1226         snprintf(env_state, sizeof(env_state), "STATE=%s",
1227                 (data->state == QETH_SBP_STATE_INACTIVE) ? "inactive" :
1228                 (data->state == QETH_SBP_STATE_STANDBY) ? "standby" :
1229                 (data->state == QETH_SBP_STATE_ACTIVE) ? "active" :
1230                 "<INVALID>");
1231         kobject_uevent_env(&data->card->gdev->dev.kobj,
1232                                 KOBJ_CHANGE, env);
1233         kfree(data);
1234 }
1235
1236 static void qeth_bridge_state_change(struct qeth_card *card,
1237                                         struct qeth_ipa_cmd *cmd)
1238 {
1239         struct qeth_sbp_port_data *qports = &cmd->data.sbp.data.port_data;
1240         struct qeth_bridge_state_data *data;
1241
1242         QETH_CARD_TEXT(card, 2, "brstchng");
1243         if (qports->num_entries == 0) {
1244                 QETH_CARD_TEXT(card, 2, "BPempty");
1245                 return;
1246         }
1247         if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1248                 QETH_CARD_TEXT_(card, 2, "BPsz%04x", qports->entry_length);
1249                 return;
1250         }
1251
1252         data = kzalloc(sizeof(*data), GFP_ATOMIC);
1253         if (!data) {
1254                 QETH_CARD_TEXT(card, 2, "BPSalloc");
1255                 return;
1256         }
1257         INIT_WORK(&data->worker, qeth_bridge_state_change_worker);
1258         data->card = card;
1259         /* Information for the local port: */
1260         data->role = qports->entry[0].role;
1261         data->state = qports->entry[0].state;
1262
1263         queue_work(card->event_wq, &data->worker);
1264 }
1265
1266 struct qeth_addr_change_data {
1267         struct delayed_work dwork;
1268         struct qeth_card *card;
1269         struct qeth_ipacmd_addr_change ac_event;
1270 };
1271
1272 static void qeth_l2_dev2br_worker(struct work_struct *work)
1273 {
1274         struct delayed_work *dwork = to_delayed_work(work);
1275         struct qeth_addr_change_data *data;
1276         struct qeth_card *card;
1277         struct qeth_priv *priv;
1278         unsigned int i;
1279         int rc;
1280
1281         data = container_of(dwork, struct qeth_addr_change_data, dwork);
1282         card = data->card;
1283         priv = netdev_priv(card->dev);
1284
1285         QETH_CARD_TEXT(card, 4, "dev2brew");
1286
1287         if (READ_ONCE(card->info.pnso_mode) == QETH_PNSO_NONE)
1288                 goto free;
1289
1290         if (data->ac_event.lost_event_mask) {
1291                 /* Potential re-config in progress, try again later: */
1292                 if (!rtnl_trylock()) {
1293                         queue_delayed_work(card->event_wq, dwork,
1294                                            msecs_to_jiffies(100));
1295                         return;
1296                 }
1297
1298                 if (!netif_device_present(card->dev)) {
1299                         rtnl_unlock();
1300                         goto free;
1301                 }
1302
1303                 QETH_DBF_MESSAGE(3,
1304                                  "Address change notification overflow on device %x\n",
1305                                  CARD_DEVID(card));
1306                 /* Card fdb and bridge fdb are out of sync, card has stopped
1307                  * notifications (no need to drain_workqueue). Purge all
1308                  * 'extern_learn' entries from the parent bridge and restart
1309                  * the notifications.
1310                  */
1311                 qeth_l2_dev2br_fdb_flush(card);
1312                 rc = qeth_l2_dev2br_an_set(card, true);
1313                 if (rc) {
1314                         /* TODO: if we want to retry after -EAGAIN, be
1315                          * aware there could be stale entries in the
1316                          * workqueue now, that need to be drained.
1317                          * For now we give up:
1318                          */
1319                         netdev_err(card->dev,
1320                                    "bridge learning_sync failed to recover: %d\n",
1321                                    rc);
1322                         WRITE_ONCE(card->info.pnso_mode,
1323                                    QETH_PNSO_NONE);
1324                         /* To remove fdb entries reported by an_set: */
1325                         qeth_l2_dev2br_fdb_flush(card);
1326                         priv->brport_features ^= BR_LEARNING_SYNC;
1327                 } else {
1328                         QETH_DBF_MESSAGE(3,
1329                                          "Address Notification resynced on device %x\n",
1330                                          CARD_DEVID(card));
1331                 }
1332
1333                 rtnl_unlock();
1334         } else {
1335                 for (i = 0; i < data->ac_event.num_entries; i++) {
1336                         struct qeth_ipacmd_addr_change_entry *entry =
1337                                         &data->ac_event.entry[i];
1338                         qeth_l2_dev2br_fdb_notify(card,
1339                                                   entry->change_code,
1340                                                   &entry->token,
1341                                                   &entry->addr_lnid);
1342                 }
1343         }
1344
1345 free:
1346         kfree(data);
1347 }
1348
1349 static void qeth_addr_change_event_worker(struct work_struct *work)
1350 {
1351         struct delayed_work *dwork = to_delayed_work(work);
1352         struct qeth_addr_change_data *data;
1353         struct qeth_card *card;
1354         int i;
1355
1356         data = container_of(dwork, struct qeth_addr_change_data, dwork);
1357         card = data->card;
1358
1359         QETH_CARD_TEXT(data->card, 4, "adrchgew");
1360
1361         if (READ_ONCE(card->info.pnso_mode) == QETH_PNSO_NONE)
1362                 goto free;
1363
1364         if (data->ac_event.lost_event_mask) {
1365                 /* Potential re-config in progress, try again later: */
1366                 if (!mutex_trylock(&card->sbp_lock)) {
1367                         queue_delayed_work(card->event_wq, dwork,
1368                                            msecs_to_jiffies(100));
1369                         return;
1370                 }
1371
1372                 dev_info(&data->card->gdev->dev,
1373                          "Address change notification stopped on %s (%s)\n",
1374                          netdev_name(card->dev),
1375                         (data->ac_event.lost_event_mask == 0x01)
1376                         ? "Overflow"
1377                         : (data->ac_event.lost_event_mask == 0x02)
1378                         ? "Bridge port state change"
1379                         : "Unknown reason");
1380
1381                 data->card->options.sbp.hostnotification = 0;
1382                 card->info.pnso_mode = QETH_PNSO_NONE;
1383                 mutex_unlock(&data->card->sbp_lock);
1384                 qeth_bridge_emit_host_event(data->card, anev_abort,
1385                                             0, NULL, NULL);
1386         } else
1387                 for (i = 0; i < data->ac_event.num_entries; i++) {
1388                         struct qeth_ipacmd_addr_change_entry *entry =
1389                                         &data->ac_event.entry[i];
1390                         qeth_bridge_emit_host_event(data->card,
1391                                                     anev_reg_unreg,
1392                                                     entry->change_code,
1393                                                     &entry->token,
1394                                                     &entry->addr_lnid);
1395                 }
1396
1397 free:
1398         kfree(data);
1399 }
1400
1401 static void qeth_addr_change_event(struct qeth_card *card,
1402                                    struct qeth_ipa_cmd *cmd)
1403 {
1404         struct qeth_ipacmd_addr_change *hostevs =
1405                  &cmd->data.addrchange;
1406         struct qeth_addr_change_data *data;
1407         int extrasize;
1408
1409         if (card->info.pnso_mode == QETH_PNSO_NONE)
1410                 return;
1411
1412         QETH_CARD_TEXT(card, 4, "adrchgev");
1413         if (cmd->hdr.return_code != 0x0000) {
1414                 if (cmd->hdr.return_code == 0x0010) {
1415                         if (hostevs->lost_event_mask == 0x00)
1416                                 hostevs->lost_event_mask = 0xff;
1417                 } else {
1418                         QETH_CARD_TEXT_(card, 2, "ACHN%04x",
1419                                 cmd->hdr.return_code);
1420                         return;
1421                 }
1422         }
1423         extrasize = sizeof(struct qeth_ipacmd_addr_change_entry) *
1424                                                 hostevs->num_entries;
1425         data = kzalloc(sizeof(struct qeth_addr_change_data) + extrasize,
1426                        GFP_ATOMIC);
1427         if (!data) {
1428                 QETH_CARD_TEXT(card, 2, "ACNalloc");
1429                 return;
1430         }
1431         if (card->info.pnso_mode == QETH_PNSO_BRIDGEPORT)
1432                 INIT_DELAYED_WORK(&data->dwork, qeth_addr_change_event_worker);
1433         else
1434                 INIT_DELAYED_WORK(&data->dwork, qeth_l2_dev2br_worker);
1435         data->card = card;
1436         memcpy(&data->ac_event, hostevs,
1437                         sizeof(struct qeth_ipacmd_addr_change) + extrasize);
1438         queue_delayed_work(card->event_wq, &data->dwork, 0);
1439 }
1440
1441 /* SETBRIDGEPORT support; sending commands */
1442
1443 struct _qeth_sbp_cbctl {
1444         union {
1445                 u32 supported;
1446                 struct {
1447                         enum qeth_sbp_roles *role;
1448                         enum qeth_sbp_states *state;
1449                 } qports;
1450         } data;
1451 };
1452
1453 static int qeth_bridgeport_makerc(struct qeth_card *card,
1454                                   struct qeth_ipa_cmd *cmd)
1455 {
1456         struct qeth_ipacmd_setbridgeport *sbp = &cmd->data.sbp;
1457         enum qeth_ipa_sbp_cmd setcmd = sbp->hdr.command_code;
1458         u16 ipa_rc = cmd->hdr.return_code;
1459         u16 sbp_rc = sbp->hdr.return_code;
1460         int rc;
1461
1462         if (ipa_rc == IPA_RC_SUCCESS && sbp_rc == IPA_RC_SUCCESS)
1463                 return 0;
1464
1465         if ((IS_IQD(card) && ipa_rc == IPA_RC_SUCCESS) ||
1466             (!IS_IQD(card) && ipa_rc == sbp_rc)) {
1467                 switch (sbp_rc) {
1468                 case IPA_RC_SUCCESS:
1469                         rc = 0;
1470                         break;
1471                 case IPA_RC_L2_UNSUPPORTED_CMD:
1472                 case IPA_RC_UNSUPPORTED_COMMAND:
1473                         rc = -EOPNOTSUPP;
1474                         break;
1475                 case IPA_RC_SBP_OSA_NOT_CONFIGURED:
1476                 case IPA_RC_SBP_IQD_NOT_CONFIGURED:
1477                         rc = -ENODEV; /* maybe not the best code here? */
1478                         dev_err(&card->gdev->dev,
1479         "The device is not configured as a Bridge Port\n");
1480                         break;
1481                 case IPA_RC_SBP_OSA_OS_MISMATCH:
1482                 case IPA_RC_SBP_IQD_OS_MISMATCH:
1483                         rc = -EPERM;
1484                         dev_err(&card->gdev->dev,
1485         "A Bridge Port is already configured by a different operating system\n");
1486                         break;
1487                 case IPA_RC_SBP_OSA_ANO_DEV_PRIMARY:
1488                 case IPA_RC_SBP_IQD_ANO_DEV_PRIMARY:
1489                         switch (setcmd) {
1490                         case IPA_SBP_SET_PRIMARY_BRIDGE_PORT:
1491                                 rc = -EEXIST;
1492                                 dev_err(&card->gdev->dev,
1493         "The LAN already has a primary Bridge Port\n");
1494                                 break;
1495                         case IPA_SBP_SET_SECONDARY_BRIDGE_PORT:
1496                                 rc = -EBUSY;
1497                                 dev_err(&card->gdev->dev,
1498         "The device is already a primary Bridge Port\n");
1499                                 break;
1500                         default:
1501                                 rc = -EIO;
1502                         }
1503                         break;
1504                 case IPA_RC_SBP_OSA_CURRENT_SECOND:
1505                 case IPA_RC_SBP_IQD_CURRENT_SECOND:
1506                         rc = -EBUSY;
1507                         dev_err(&card->gdev->dev,
1508         "The device is already a secondary Bridge Port\n");
1509                         break;
1510                 case IPA_RC_SBP_OSA_LIMIT_SECOND:
1511                 case IPA_RC_SBP_IQD_LIMIT_SECOND:
1512                         rc = -EEXIST;
1513                         dev_err(&card->gdev->dev,
1514         "The LAN cannot have more secondary Bridge Ports\n");
1515                         break;
1516                 case IPA_RC_SBP_OSA_CURRENT_PRIMARY:
1517                 case IPA_RC_SBP_IQD_CURRENT_PRIMARY:
1518                         rc = -EBUSY;
1519                         dev_err(&card->gdev->dev,
1520         "The device is already a primary Bridge Port\n");
1521                         break;
1522                 case IPA_RC_SBP_OSA_NOT_AUTHD_BY_ZMAN:
1523                 case IPA_RC_SBP_IQD_NOT_AUTHD_BY_ZMAN:
1524                         rc = -EACCES;
1525                         dev_err(&card->gdev->dev,
1526         "The device is not authorized to be a Bridge Port\n");
1527                         break;
1528                 default:
1529                         rc = -EIO;
1530                 }
1531         } else {
1532                 switch (ipa_rc) {
1533                 case IPA_RC_NOTSUPP:
1534                         rc = -EOPNOTSUPP;
1535                         break;
1536                 case IPA_RC_UNSUPPORTED_COMMAND:
1537                         rc = -EOPNOTSUPP;
1538                         break;
1539                 default:
1540                         rc = -EIO;
1541                 }
1542         }
1543
1544         if (rc) {
1545                 QETH_CARD_TEXT_(card, 2, "SBPi%04x", ipa_rc);
1546                 QETH_CARD_TEXT_(card, 2, "SBPc%04x", sbp_rc);
1547         }
1548         return rc;
1549 }
1550
1551 static struct qeth_cmd_buffer *qeth_sbp_build_cmd(struct qeth_card *card,
1552                                                   enum qeth_ipa_sbp_cmd sbp_cmd,
1553                                                   unsigned int data_length)
1554 {
1555         enum qeth_ipa_cmds ipa_cmd = IS_IQD(card) ? IPA_CMD_SETBRIDGEPORT_IQD :
1556                                                     IPA_CMD_SETBRIDGEPORT_OSA;
1557         struct qeth_ipacmd_sbp_hdr *hdr;
1558         struct qeth_cmd_buffer *iob;
1559
1560         iob = qeth_ipa_alloc_cmd(card, ipa_cmd, QETH_PROT_NONE,
1561                                  data_length +
1562                                  offsetof(struct qeth_ipacmd_setbridgeport,
1563                                           data));
1564         if (!iob)
1565                 return iob;
1566
1567         hdr = &__ipa_cmd(iob)->data.sbp.hdr;
1568         hdr->cmdlength = sizeof(*hdr) + data_length;
1569         hdr->command_code = sbp_cmd;
1570         hdr->used_total = 1;
1571         hdr->seq_no = 1;
1572         return iob;
1573 }
1574
1575 static int qeth_bridgeport_query_support_cb(struct qeth_card *card,
1576         struct qeth_reply *reply, unsigned long data)
1577 {
1578         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1579         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1580         int rc;
1581
1582         QETH_CARD_TEXT(card, 2, "brqsupcb");
1583         rc = qeth_bridgeport_makerc(card, cmd);
1584         if (rc)
1585                 return rc;
1586
1587         cbctl->data.supported =
1588                 cmd->data.sbp.data.query_cmds_supp.supported_cmds;
1589         return 0;
1590 }
1591
1592 /**
1593  * qeth_bridgeport_query_support() - store bitmask of supported subfunctions.
1594  * @card:                            qeth_card structure pointer.
1595  *
1596  * Sets bitmask of supported setbridgeport subfunctions in the qeth_card
1597  * strucutre: card->options.sbp.supported_funcs.
1598  */
1599 static void qeth_bridgeport_query_support(struct qeth_card *card)
1600 {
1601         struct qeth_cmd_buffer *iob;
1602         struct _qeth_sbp_cbctl cbctl;
1603
1604         QETH_CARD_TEXT(card, 2, "brqsuppo");
1605         iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_COMMANDS_SUPPORTED,
1606                                  SBP_DATA_SIZEOF(query_cmds_supp));
1607         if (!iob)
1608                 return;
1609
1610         if (qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_support_cb,
1611                               &cbctl)) {
1612                 card->options.sbp.role = QETH_SBP_ROLE_NONE;
1613                 card->options.sbp.supported_funcs = 0;
1614                 return;
1615         }
1616         card->options.sbp.supported_funcs = cbctl.data.supported;
1617 }
1618
1619 static int qeth_bridgeport_query_ports_cb(struct qeth_card *card,
1620         struct qeth_reply *reply, unsigned long data)
1621 {
1622         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1623         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1624         struct qeth_sbp_port_data *qports;
1625         int rc;
1626
1627         QETH_CARD_TEXT(card, 2, "brqprtcb");
1628         rc = qeth_bridgeport_makerc(card, cmd);
1629         if (rc)
1630                 return rc;
1631
1632         qports = &cmd->data.sbp.data.port_data;
1633         if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1634                 QETH_CARD_TEXT_(card, 2, "SBPs%04x", qports->entry_length);
1635                 return -EINVAL;
1636         }
1637         /* first entry contains the state of the local port */
1638         if (qports->num_entries > 0) {
1639                 if (cbctl->data.qports.role)
1640                         *cbctl->data.qports.role = qports->entry[0].role;
1641                 if (cbctl->data.qports.state)
1642                         *cbctl->data.qports.state = qports->entry[0].state;
1643         }
1644         return 0;
1645 }
1646
1647 /**
1648  * qeth_bridgeport_query_ports() - query local bridgeport status.
1649  * @card:                          qeth_card structure pointer.
1650  * @role:   Role of the port: 0-none, 1-primary, 2-secondary.
1651  * @state:  State of the port: 0-inactive, 1-standby, 2-active.
1652  *
1653  * Returns negative errno-compatible error indication or 0 on success.
1654  *
1655  * 'role' and 'state' are not updated in case of hardware operation failure.
1656  */
1657 int qeth_bridgeport_query_ports(struct qeth_card *card,
1658         enum qeth_sbp_roles *role, enum qeth_sbp_states *state)
1659 {
1660         struct qeth_cmd_buffer *iob;
1661         struct _qeth_sbp_cbctl cbctl = {
1662                 .data = {
1663                         .qports = {
1664                                 .role = role,
1665                                 .state = state,
1666                         },
1667                 },
1668         };
1669
1670         QETH_CARD_TEXT(card, 2, "brqports");
1671         if (!(card->options.sbp.supported_funcs & IPA_SBP_QUERY_BRIDGE_PORTS))
1672                 return -EOPNOTSUPP;
1673         iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_BRIDGE_PORTS, 0);
1674         if (!iob)
1675                 return -ENOMEM;
1676
1677         return qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_ports_cb,
1678                                  &cbctl);
1679 }
1680
1681 static int qeth_bridgeport_set_cb(struct qeth_card *card,
1682         struct qeth_reply *reply, unsigned long data)
1683 {
1684         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
1685
1686         QETH_CARD_TEXT(card, 2, "brsetrcb");
1687         return qeth_bridgeport_makerc(card, cmd);
1688 }
1689
1690 /**
1691  * qeth_bridgeport_setrole() - Assign primary role to the port.
1692  * @card:                      qeth_card structure pointer.
1693  * @role:                      Role to assign.
1694  *
1695  * Returns negative errno-compatible error indication or 0 on success.
1696  */
1697 int qeth_bridgeport_setrole(struct qeth_card *card, enum qeth_sbp_roles role)
1698 {
1699         struct qeth_cmd_buffer *iob;
1700         enum qeth_ipa_sbp_cmd setcmd;
1701         unsigned int cmdlength = 0;
1702
1703         QETH_CARD_TEXT(card, 2, "brsetrol");
1704         switch (role) {
1705         case QETH_SBP_ROLE_NONE:
1706                 setcmd = IPA_SBP_RESET_BRIDGE_PORT_ROLE;
1707                 break;
1708         case QETH_SBP_ROLE_PRIMARY:
1709                 setcmd = IPA_SBP_SET_PRIMARY_BRIDGE_PORT;
1710                 cmdlength = SBP_DATA_SIZEOF(set_primary);
1711                 break;
1712         case QETH_SBP_ROLE_SECONDARY:
1713                 setcmd = IPA_SBP_SET_SECONDARY_BRIDGE_PORT;
1714                 break;
1715         default:
1716                 return -EINVAL;
1717         }
1718         if (!(card->options.sbp.supported_funcs & setcmd))
1719                 return -EOPNOTSUPP;
1720         iob = qeth_sbp_build_cmd(card, setcmd, cmdlength);
1721         if (!iob)
1722                 return -ENOMEM;
1723
1724         return qeth_send_ipa_cmd(card, iob, qeth_bridgeport_set_cb, NULL);
1725 }
1726
1727 static void qeth_bridgeport_an_set_cb(void *priv,
1728                                       struct chsc_pnso_naid_l2 *entry)
1729 {
1730         struct qeth_card *card = (struct qeth_card *)priv;
1731         u8 code;
1732
1733         code = IPA_ADDR_CHANGE_CODE_MACADDR;
1734         if (entry->addr_lnid.lnid < VLAN_N_VID)
1735                 code |= IPA_ADDR_CHANGE_CODE_VLANID;
1736         qeth_bridge_emit_host_event(card, anev_reg_unreg, code,
1737                                     (struct net_if_token *)&entry->nit,
1738                                     (struct mac_addr_lnid *)&entry->addr_lnid);
1739 }
1740
1741 /**
1742  * qeth_bridgeport_an_set() - Enable or disable bridgeport address notification
1743  * @card:                     qeth_card structure pointer.
1744  * @enable:                   0 - disable, non-zero - enable notifications
1745  *
1746  * Returns negative errno-compatible error indication or 0 on success.
1747  *
1748  * On enable, emits a series of address notifications udev events for all
1749  * currently registered hosts.
1750  */
1751 int qeth_bridgeport_an_set(struct qeth_card *card, int enable)
1752 {
1753         int rc;
1754
1755         if (!card->options.sbp.supported_funcs)
1756                 return -EOPNOTSUPP;
1757
1758         if (enable) {
1759                 qeth_bridge_emit_host_event(card, anev_reset, 0, NULL, NULL);
1760                 qeth_l2_set_pnso_mode(card, QETH_PNSO_BRIDGEPORT);
1761                 rc = qeth_l2_pnso(card, PNSO_OC_NET_BRIDGE_INFO, 1,
1762                                   qeth_bridgeport_an_set_cb, card);
1763                 if (rc)
1764                         qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
1765         } else {
1766                 rc = qeth_l2_pnso(card, PNSO_OC_NET_BRIDGE_INFO, 0, NULL, NULL);
1767                 qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
1768         }
1769         return rc;
1770 }
1771
1772 /* VNIC Characteristics support */
1773
1774 /* handle VNICC IPA command return codes; convert to error codes */
1775 static int qeth_l2_vnicc_makerc(struct qeth_card *card, u16 ipa_rc)
1776 {
1777         int rc;
1778
1779         switch (ipa_rc) {
1780         case IPA_RC_SUCCESS:
1781                 return ipa_rc;
1782         case IPA_RC_L2_UNSUPPORTED_CMD:
1783         case IPA_RC_NOTSUPP:
1784                 rc = -EOPNOTSUPP;
1785                 break;
1786         case IPA_RC_VNICC_OOSEQ:
1787                 rc = -EALREADY;
1788                 break;
1789         case IPA_RC_VNICC_VNICBP:
1790                 rc = -EBUSY;
1791                 break;
1792         case IPA_RC_L2_ADDR_TABLE_FULL:
1793                 rc = -ENOSPC;
1794                 break;
1795         case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
1796                 rc = -EACCES;
1797                 break;
1798         default:
1799                 rc = -EIO;
1800         }
1801
1802         QETH_CARD_TEXT_(card, 2, "err%04x", ipa_rc);
1803         return rc;
1804 }
1805
1806 /* generic VNICC request call back */
1807 static int qeth_l2_vnicc_request_cb(struct qeth_card *card,
1808                                     struct qeth_reply *reply,
1809                                     unsigned long data)
1810 {
1811         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1812         struct qeth_ipacmd_vnicc *rep = &cmd->data.vnicc;
1813         u32 sub_cmd = cmd->data.vnicc.hdr.sub_command;
1814
1815         QETH_CARD_TEXT(card, 2, "vniccrcb");
1816         if (cmd->hdr.return_code)
1817                 return qeth_l2_vnicc_makerc(card, cmd->hdr.return_code);
1818         /* return results to caller */
1819         card->options.vnicc.sup_chars = rep->vnicc_cmds.supported;
1820         card->options.vnicc.cur_chars = rep->vnicc_cmds.enabled;
1821
1822         if (sub_cmd == IPA_VNICC_QUERY_CMDS)
1823                 *(u32 *)reply->param = rep->data.query_cmds.sup_cmds;
1824         else if (sub_cmd == IPA_VNICC_GET_TIMEOUT)
1825                 *(u32 *)reply->param = rep->data.getset_timeout.timeout;
1826
1827         return 0;
1828 }
1829
1830 static struct qeth_cmd_buffer *qeth_l2_vnicc_build_cmd(struct qeth_card *card,
1831                                                        u32 vnicc_cmd,
1832                                                        unsigned int data_length)
1833 {
1834         struct qeth_ipacmd_vnicc_hdr *hdr;
1835         struct qeth_cmd_buffer *iob;
1836
1837         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_VNICC, QETH_PROT_NONE,
1838                                  data_length +
1839                                  offsetof(struct qeth_ipacmd_vnicc, data));
1840         if (!iob)
1841                 return NULL;
1842
1843         hdr = &__ipa_cmd(iob)->data.vnicc.hdr;
1844         hdr->data_length = sizeof(*hdr) + data_length;
1845         hdr->sub_command = vnicc_cmd;
1846         return iob;
1847 }
1848
1849 /* VNICC query VNIC characteristics request */
1850 static int qeth_l2_vnicc_query_chars(struct qeth_card *card)
1851 {
1852         struct qeth_cmd_buffer *iob;
1853
1854         QETH_CARD_TEXT(card, 2, "vniccqch");
1855         iob = qeth_l2_vnicc_build_cmd(card, IPA_VNICC_QUERY_CHARS, 0);
1856         if (!iob)
1857                 return -ENOMEM;
1858
1859         return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, NULL);
1860 }
1861
1862 /* VNICC query sub commands request */
1863 static int qeth_l2_vnicc_query_cmds(struct qeth_card *card, u32 vnic_char,
1864                                     u32 *sup_cmds)
1865 {
1866         struct qeth_cmd_buffer *iob;
1867
1868         QETH_CARD_TEXT(card, 2, "vniccqcm");
1869         iob = qeth_l2_vnicc_build_cmd(card, IPA_VNICC_QUERY_CMDS,
1870                                       VNICC_DATA_SIZEOF(query_cmds));
1871         if (!iob)
1872                 return -ENOMEM;
1873
1874         __ipa_cmd(iob)->data.vnicc.data.query_cmds.vnic_char = vnic_char;
1875
1876         return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, sup_cmds);
1877 }
1878
1879 /* VNICC enable/disable characteristic request */
1880 static int qeth_l2_vnicc_set_char(struct qeth_card *card, u32 vnic_char,
1881                                       u32 cmd)
1882 {
1883         struct qeth_cmd_buffer *iob;
1884
1885         QETH_CARD_TEXT(card, 2, "vniccedc");
1886         iob = qeth_l2_vnicc_build_cmd(card, cmd, VNICC_DATA_SIZEOF(set_char));
1887         if (!iob)
1888                 return -ENOMEM;
1889
1890         __ipa_cmd(iob)->data.vnicc.data.set_char.vnic_char = vnic_char;
1891
1892         return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, NULL);
1893 }
1894
1895 /* VNICC get/set timeout for characteristic request */
1896 static int qeth_l2_vnicc_getset_timeout(struct qeth_card *card, u32 vnicc,
1897                                         u32 cmd, u32 *timeout)
1898 {
1899         struct qeth_vnicc_getset_timeout *getset_timeout;
1900         struct qeth_cmd_buffer *iob;
1901
1902         QETH_CARD_TEXT(card, 2, "vniccgst");
1903         iob = qeth_l2_vnicc_build_cmd(card, cmd,
1904                                       VNICC_DATA_SIZEOF(getset_timeout));
1905         if (!iob)
1906                 return -ENOMEM;
1907
1908         getset_timeout = &__ipa_cmd(iob)->data.vnicc.data.getset_timeout;
1909         getset_timeout->vnic_char = vnicc;
1910
1911         if (cmd == IPA_VNICC_SET_TIMEOUT)
1912                 getset_timeout->timeout = *timeout;
1913
1914         return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, timeout);
1915 }
1916
1917 /* recover user timeout setting */
1918 static bool qeth_l2_vnicc_recover_timeout(struct qeth_card *card, u32 vnicc,
1919                                           u32 *timeout)
1920 {
1921         if (card->options.vnicc.sup_chars & vnicc &&
1922             card->options.vnicc.getset_timeout_sup & vnicc &&
1923             !qeth_l2_vnicc_getset_timeout(card, vnicc, IPA_VNICC_SET_TIMEOUT,
1924                                           timeout))
1925                 return false;
1926         *timeout = QETH_VNICC_DEFAULT_TIMEOUT;
1927         return true;
1928 }
1929
1930 /* set current VNICC flag state; called from sysfs store function */
1931 int qeth_l2_vnicc_set_state(struct qeth_card *card, u32 vnicc, bool state)
1932 {
1933         int rc = 0;
1934         u32 cmd;
1935
1936         QETH_CARD_TEXT(card, 2, "vniccsch");
1937
1938         /* check if characteristic and enable/disable are supported */
1939         if (!(card->options.vnicc.sup_chars & vnicc) ||
1940             !(card->options.vnicc.set_char_sup & vnicc))
1941                 return -EOPNOTSUPP;
1942
1943         if (qeth_bridgeport_is_in_use(card))
1944                 return -EBUSY;
1945
1946         /* set enable/disable command and store wanted characteristic */
1947         if (state) {
1948                 cmd = IPA_VNICC_ENABLE;
1949                 card->options.vnicc.wanted_chars |= vnicc;
1950         } else {
1951                 cmd = IPA_VNICC_DISABLE;
1952                 card->options.vnicc.wanted_chars &= ~vnicc;
1953         }
1954
1955         /* do we need to do anything? */
1956         if (card->options.vnicc.cur_chars == card->options.vnicc.wanted_chars)
1957                 return rc;
1958
1959         /* if card is not ready, simply stop here */
1960         if (!qeth_card_hw_is_reachable(card)) {
1961                 if (state)
1962                         card->options.vnicc.cur_chars |= vnicc;
1963                 else
1964                         card->options.vnicc.cur_chars &= ~vnicc;
1965                 return rc;
1966         }
1967
1968         rc = qeth_l2_vnicc_set_char(card, vnicc, cmd);
1969         if (rc)
1970                 card->options.vnicc.wanted_chars =
1971                         card->options.vnicc.cur_chars;
1972         else {
1973                 /* successful online VNICC change; handle special cases */
1974                 if (state && vnicc == QETH_VNICC_RX_BCAST)
1975                         card->options.vnicc.rx_bcast_enabled = true;
1976                 if (!state && vnicc == QETH_VNICC_LEARNING)
1977                         qeth_l2_vnicc_recover_timeout(card, vnicc,
1978                                         &card->options.vnicc.learning_timeout);
1979         }
1980
1981         return rc;
1982 }
1983
1984 /* get current VNICC flag state; called from sysfs show function */
1985 int qeth_l2_vnicc_get_state(struct qeth_card *card, u32 vnicc, bool *state)
1986 {
1987         int rc = 0;
1988
1989         QETH_CARD_TEXT(card, 2, "vniccgch");
1990
1991         /* check if characteristic is supported */
1992         if (!(card->options.vnicc.sup_chars & vnicc))
1993                 return -EOPNOTSUPP;
1994
1995         if (qeth_bridgeport_is_in_use(card))
1996                 return -EBUSY;
1997
1998         /* if card is ready, query current VNICC state */
1999         if (qeth_card_hw_is_reachable(card))
2000                 rc = qeth_l2_vnicc_query_chars(card);
2001
2002         *state = (card->options.vnicc.cur_chars & vnicc) ? true : false;
2003         return rc;
2004 }
2005
2006 /* set VNICC timeout; called from sysfs store function. Currently, only learning
2007  * supports timeout
2008  */
2009 int qeth_l2_vnicc_set_timeout(struct qeth_card *card, u32 timeout)
2010 {
2011         int rc = 0;
2012
2013         QETH_CARD_TEXT(card, 2, "vniccsto");
2014
2015         /* check if characteristic and set_timeout are supported */
2016         if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
2017             !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
2018                 return -EOPNOTSUPP;
2019
2020         if (qeth_bridgeport_is_in_use(card))
2021                 return -EBUSY;
2022
2023         /* do we need to do anything? */
2024         if (card->options.vnicc.learning_timeout == timeout)
2025                 return rc;
2026
2027         /* if card is not ready, simply store the value internally and return */
2028         if (!qeth_card_hw_is_reachable(card)) {
2029                 card->options.vnicc.learning_timeout = timeout;
2030                 return rc;
2031         }
2032
2033         /* send timeout value to card; if successful, store value internally */
2034         rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
2035                                           IPA_VNICC_SET_TIMEOUT, &timeout);
2036         if (!rc)
2037                 card->options.vnicc.learning_timeout = timeout;
2038
2039         return rc;
2040 }
2041
2042 /* get current VNICC timeout; called from sysfs show function. Currently, only
2043  * learning supports timeout
2044  */
2045 int qeth_l2_vnicc_get_timeout(struct qeth_card *card, u32 *timeout)
2046 {
2047         int rc = 0;
2048
2049         QETH_CARD_TEXT(card, 2, "vniccgto");
2050
2051         /* check if characteristic and get_timeout are supported */
2052         if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
2053             !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
2054                 return -EOPNOTSUPP;
2055
2056         if (qeth_bridgeport_is_in_use(card))
2057                 return -EBUSY;
2058
2059         /* if card is ready, get timeout. Otherwise, just return stored value */
2060         *timeout = card->options.vnicc.learning_timeout;
2061         if (qeth_card_hw_is_reachable(card))
2062                 rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
2063                                                   IPA_VNICC_GET_TIMEOUT,
2064                                                   timeout);
2065
2066         return rc;
2067 }
2068
2069 /* check if VNICC is currently enabled */
2070 static bool _qeth_l2_vnicc_is_in_use(struct qeth_card *card)
2071 {
2072         if (!card->options.vnicc.sup_chars)
2073                 return false;
2074         /* default values are only OK if rx_bcast was not enabled by user
2075          * or the card is offline.
2076          */
2077         if (card->options.vnicc.cur_chars == QETH_VNICC_DEFAULT) {
2078                 if (!card->options.vnicc.rx_bcast_enabled ||
2079                     !qeth_card_hw_is_reachable(card))
2080                         return false;
2081         }
2082         return true;
2083 }
2084
2085 /**
2086  *      qeth_bridgeport_allowed - are any qeth_bridgeport functions allowed?
2087  *      @card: qeth_card structure pointer
2088  *
2089  *      qeth_bridgeport functionality is mutually exclusive with usage of the
2090  *      VNIC Characteristics and dev2br address notifications
2091  */
2092 bool qeth_bridgeport_allowed(struct qeth_card *card)
2093 {
2094         struct qeth_priv *priv = netdev_priv(card->dev);
2095
2096         return (!_qeth_l2_vnicc_is_in_use(card) &&
2097                 !(priv->brport_features & BR_LEARNING_SYNC));
2098 }
2099
2100 /* recover user characteristic setting */
2101 static bool qeth_l2_vnicc_recover_char(struct qeth_card *card, u32 vnicc,
2102                                        bool enable)
2103 {
2104         u32 cmd = enable ? IPA_VNICC_ENABLE : IPA_VNICC_DISABLE;
2105
2106         if (card->options.vnicc.sup_chars & vnicc &&
2107             card->options.vnicc.set_char_sup & vnicc &&
2108             !qeth_l2_vnicc_set_char(card, vnicc, cmd))
2109                 return false;
2110         card->options.vnicc.wanted_chars &= ~vnicc;
2111         card->options.vnicc.wanted_chars |= QETH_VNICC_DEFAULT & vnicc;
2112         return true;
2113 }
2114
2115 /* (re-)initialize VNICC */
2116 static void qeth_l2_vnicc_init(struct qeth_card *card)
2117 {
2118         u32 *timeout = &card->options.vnicc.learning_timeout;
2119         bool enable, error = false;
2120         unsigned int chars_len, i;
2121         unsigned long chars_tmp;
2122         u32 sup_cmds, vnicc;
2123
2124         QETH_CARD_TEXT(card, 2, "vniccini");
2125         /* reset rx_bcast */
2126         card->options.vnicc.rx_bcast_enabled = 0;
2127         /* initial query and storage of VNIC characteristics */
2128         if (qeth_l2_vnicc_query_chars(card)) {
2129                 if (card->options.vnicc.wanted_chars != QETH_VNICC_DEFAULT ||
2130                     *timeout != QETH_VNICC_DEFAULT_TIMEOUT)
2131                         dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
2132                 /* fail quietly if user didn't change the default config */
2133                 card->options.vnicc.sup_chars = 0;
2134                 card->options.vnicc.cur_chars = 0;
2135                 card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
2136                 return;
2137         }
2138         /* get supported commands for each supported characteristic */
2139         chars_tmp = card->options.vnicc.sup_chars;
2140         chars_len = sizeof(card->options.vnicc.sup_chars) * BITS_PER_BYTE;
2141         for_each_set_bit(i, &chars_tmp, chars_len) {
2142                 vnicc = BIT(i);
2143                 if (qeth_l2_vnicc_query_cmds(card, vnicc, &sup_cmds)) {
2144                         sup_cmds = 0;
2145                         error = true;
2146                 }
2147                 if ((sup_cmds & IPA_VNICC_SET_TIMEOUT) &&
2148                     (sup_cmds & IPA_VNICC_GET_TIMEOUT))
2149                         card->options.vnicc.getset_timeout_sup |= vnicc;
2150                 else
2151                         card->options.vnicc.getset_timeout_sup &= ~vnicc;
2152                 if ((sup_cmds & IPA_VNICC_ENABLE) &&
2153                     (sup_cmds & IPA_VNICC_DISABLE))
2154                         card->options.vnicc.set_char_sup |= vnicc;
2155                 else
2156                         card->options.vnicc.set_char_sup &= ~vnicc;
2157         }
2158         /* enforce assumed default values and recover settings, if changed  */
2159         error |= qeth_l2_vnicc_recover_timeout(card, QETH_VNICC_LEARNING,
2160                                                timeout);
2161         /* Change chars, if necessary  */
2162         chars_tmp = card->options.vnicc.wanted_chars ^
2163                     card->options.vnicc.cur_chars;
2164         chars_len = sizeof(card->options.vnicc.wanted_chars) * BITS_PER_BYTE;
2165         for_each_set_bit(i, &chars_tmp, chars_len) {
2166                 vnicc = BIT(i);
2167                 enable = card->options.vnicc.wanted_chars & vnicc;
2168                 error |= qeth_l2_vnicc_recover_char(card, vnicc, enable);
2169         }
2170         if (error)
2171                 dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
2172 }
2173
2174 /* configure default values of VNIC characteristics */
2175 static void qeth_l2_vnicc_set_defaults(struct qeth_card *card)
2176 {
2177         /* characteristics values */
2178         card->options.vnicc.sup_chars = QETH_VNICC_ALL;
2179         card->options.vnicc.cur_chars = QETH_VNICC_DEFAULT;
2180         card->options.vnicc.learning_timeout = QETH_VNICC_DEFAULT_TIMEOUT;
2181         /* supported commands */
2182         card->options.vnicc.set_char_sup = QETH_VNICC_ALL;
2183         card->options.vnicc.getset_timeout_sup = QETH_VNICC_LEARNING;
2184         /* settings wanted by users */
2185         card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
2186 }
2187
2188 static const struct device_type qeth_l2_devtype = {
2189         .name = "qeth_layer2",
2190         .groups = qeth_l2_attr_groups,
2191 };
2192
2193 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
2194 {
2195         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
2196         int rc;
2197
2198         if (IS_OSN(card))
2199                 dev_notice(&gdev->dev, "OSN support will be dropped in 2021\n");
2200
2201         qeth_l2_vnicc_set_defaults(card);
2202         mutex_init(&card->sbp_lock);
2203
2204         if (gdev->dev.type == &qeth_generic_devtype) {
2205                 rc = qeth_l2_create_device_attributes(&gdev->dev);
2206                 if (rc)
2207                         return rc;
2208         }
2209
2210         INIT_WORK(&card->rx_mode_work, qeth_l2_rx_mode_work);
2211         return 0;
2212 }
2213
2214 static void qeth_l2_remove_device(struct ccwgroup_device *gdev)
2215 {
2216         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
2217
2218         if (gdev->dev.type == &qeth_generic_devtype)
2219                 qeth_l2_remove_device_attributes(&gdev->dev);
2220         qeth_set_allowed_threads(card, 0, 1);
2221         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
2222
2223         if (gdev->state == CCWGROUP_ONLINE)
2224                 qeth_set_offline(card, false);
2225
2226         cancel_work_sync(&card->close_dev_work);
2227         if (card->dev->reg_state == NETREG_REGISTERED)
2228                 unregister_netdev(card->dev);
2229 }
2230
2231 static int qeth_l2_set_online(struct qeth_card *card, bool carrier_ok)
2232 {
2233         struct net_device *dev = card->dev;
2234         int rc = 0;
2235
2236         /* query before bridgeport_notification may be enabled */
2237         qeth_l2_detect_dev2br_support(card);
2238
2239         mutex_lock(&card->sbp_lock);
2240         qeth_bridgeport_query_support(card);
2241         if (card->options.sbp.supported_funcs) {
2242                 qeth_l2_setup_bridgeport_attrs(card);
2243                 dev_info(&card->gdev->dev,
2244                          "The device represents a Bridge Capable Port\n");
2245         }
2246         mutex_unlock(&card->sbp_lock);
2247
2248         qeth_l2_register_dev_addr(card);
2249
2250         /* for the rx_bcast characteristic, init VNICC after setmac */
2251         qeth_l2_vnicc_init(card);
2252
2253         qeth_l2_trace_features(card);
2254
2255         /* softsetup */
2256         QETH_CARD_TEXT(card, 2, "softsetp");
2257
2258         card->state = CARD_STATE_SOFTSETUP;
2259
2260         qeth_set_allowed_threads(card, 0xffffffff, 0);
2261
2262         if (dev->reg_state != NETREG_REGISTERED) {
2263                 rc = qeth_l2_setup_netdev(card);
2264                 if (rc)
2265                         goto err_setup;
2266
2267                 if (carrier_ok)
2268                         netif_carrier_on(dev);
2269         } else {
2270                 rtnl_lock();
2271                 rc = qeth_set_real_num_tx_queues(card,
2272                                                  qeth_tx_actual_queues(card));
2273                 if (rc) {
2274                         rtnl_unlock();
2275                         goto err_set_queues;
2276                 }
2277
2278                 if (carrier_ok)
2279                         netif_carrier_on(dev);
2280                 else
2281                         netif_carrier_off(dev);
2282
2283                 netif_device_attach(dev);
2284                 qeth_enable_hw_features(dev);
2285                 qeth_l2_enable_brport_features(card);
2286
2287                 if (card->info.open_when_online) {
2288                         card->info.open_when_online = 0;
2289                         dev_open(dev, NULL);
2290                 }
2291                 rtnl_unlock();
2292         }
2293         return 0;
2294
2295 err_set_queues:
2296 err_setup:
2297         qeth_set_allowed_threads(card, 0, 1);
2298         card->state = CARD_STATE_DOWN;
2299         return rc;
2300 }
2301
2302 static void qeth_l2_set_offline(struct qeth_card *card)
2303 {
2304         struct qeth_priv *priv = netdev_priv(card->dev);
2305
2306         qeth_set_allowed_threads(card, 0, 1);
2307         qeth_l2_drain_rx_mode_cache(card);
2308
2309         if (card->state == CARD_STATE_SOFTSETUP)
2310                 card->state = CARD_STATE_DOWN;
2311
2312         qeth_l2_set_pnso_mode(card, QETH_PNSO_NONE);
2313         if (priv->brport_features & BR_LEARNING_SYNC)
2314                 qeth_l2_dev2br_fdb_flush(card);
2315 }
2316
2317 /* Returns zero if the command is successfully "consumed" */
2318 static int qeth_l2_control_event(struct qeth_card *card,
2319                                  struct qeth_ipa_cmd *cmd)
2320 {
2321         switch (cmd->hdr.command) {
2322         case IPA_CMD_SETBRIDGEPORT_OSA:
2323         case IPA_CMD_SETBRIDGEPORT_IQD:
2324                 if (cmd->data.sbp.hdr.command_code ==
2325                     IPA_SBP_BRIDGE_PORT_STATE_CHANGE) {
2326                         qeth_bridge_state_change(card, cmd);
2327                         return 0;
2328                 }
2329
2330                 return 1;
2331         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
2332                 qeth_addr_change_event(card, cmd);
2333                 return 0;
2334         default:
2335                 return 1;
2336         }
2337 }
2338
2339 const struct qeth_discipline qeth_l2_discipline = {
2340         .devtype = &qeth_l2_devtype,
2341         .setup = qeth_l2_probe_device,
2342         .remove = qeth_l2_remove_device,
2343         .set_online = qeth_l2_set_online,
2344         .set_offline = qeth_l2_set_offline,
2345         .do_ioctl = NULL,
2346         .control_event_handler = qeth_l2_control_event,
2347 };
2348 EXPORT_SYMBOL_GPL(qeth_l2_discipline);
2349
2350 static int __init qeth_l2_init(void)
2351 {
2352         pr_info("register layer 2 discipline\n");
2353         return 0;
2354 }
2355
2356 static void __exit qeth_l2_exit(void)
2357 {
2358         pr_info("unregister layer 2 discipline\n");
2359 }
2360
2361 module_init(qeth_l2_init);
2362 module_exit(qeth_l2_exit);
2363 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
2364 MODULE_DESCRIPTION("qeth layer 2 discipline");
2365 MODULE_LICENSE("GPL");