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/list.h>
  21 #include <linux/hash.h>
  22 #include <linux/hashtable.h>
  23 #include <asm/setup.h>
  24 #include "qeth_core.h"
  25 #include "qeth_l2.h"
  26
  27 static void qeth_bridgeport_query_support(struct qeth_card *card);
  28 static void qeth_bridge_state_change(struct qeth_card *card,
  29                                         struct qeth_ipa_cmd *cmd);
  30 static void qeth_bridge_host_event(struct qeth_card *card,
  31                                         struct qeth_ipa_cmd *cmd);
  32 static void qeth_l2_vnicc_set_defaults(struct qeth_card *card);
  33 static void qeth_l2_vnicc_init(struct qeth_card *card);
  34 static bool qeth_l2_vnicc_recover_timeout(struct qeth_card *card, u32 vnicc,
  35                                           u32 *timeout);
  36
  37 static int qeth_l2_setdelmac_makerc(struct qeth_card *card, u16 retcode)
  38 {
  39         int rc;
  40
  41         if (retcode)
  42                 QETH_CARD_TEXT_(card, 2, "err%04x", retcode);
  43         switch (retcode) {
  44         case IPA_RC_SUCCESS:
  45                 rc = 0;
  46                 break;
  47         case IPA_RC_L2_UNSUPPORTED_CMD:
  48                 rc = -EOPNOTSUPP;
  49                 break;
  50         case IPA_RC_L2_ADDR_TABLE_FULL:
  51                 rc = -ENOSPC;
  52                 break;
  53         case IPA_RC_L2_DUP_MAC:
  54         case IPA_RC_L2_DUP_LAYER3_MAC:
  55                 rc = -EEXIST;
  56                 break;
  57         case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
  58         case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
  59                 rc = -EPERM;
  60                 break;
  61         case IPA_RC_L2_MAC_NOT_FOUND:
  62                 rc = -ENOENT;
  63                 break;
  64         default:
  65                 rc = -EIO;
  66                 break;
  67         }
  68         return rc;
  69 }
  70
  71 static int qeth_l2_send_setdelmac_cb(struct qeth_card *card,
  72                                      struct qeth_reply *reply,
  73                                      unsigned long data)
  74 {
  75         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
  76
  77         return qeth_l2_setdelmac_makerc(card, cmd->hdr.return_code);
  78 }
  79
  80 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
  81                            enum qeth_ipa_cmds ipacmd)
  82 {
  83         struct qeth_ipa_cmd *cmd;
  84         struct qeth_cmd_buffer *iob;
  85
  86         QETH_CARD_TEXT(card, 2, "L2sdmac");
  87         iob = qeth_ipa_alloc_cmd(card, ipacmd, QETH_PROT_IPV4,
  88                                  IPA_DATA_SIZEOF(setdelmac));
  89         if (!iob)
  90                 return -ENOMEM;
  91         cmd = __ipa_cmd(iob);
  92         cmd->data.setdelmac.mac_length = ETH_ALEN;
  93         ether_addr_copy(cmd->data.setdelmac.mac, mac);
  94         return qeth_send_ipa_cmd(card, iob, qeth_l2_send_setdelmac_cb, NULL);
  95 }
  96
  97 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
  98 {
  99         int rc;
 100
 101         QETH_CARD_TEXT(card, 2, "L2Setmac");
 102         rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC);
 103         if (rc == 0) {
 104                 dev_info(&card->gdev->dev,
 105                          "MAC address %pM successfully registered\n", mac);
 106         } else {
 107                 switch (rc) {
 108                 case -EEXIST:
 109                         dev_warn(&card->gdev->dev,
 110                                 "MAC address %pM already exists\n", mac);
 111                         break;
 112                 case -EPERM:
 113                         dev_warn(&card->gdev->dev,
 114                                 "MAC address %pM is not authorized\n", mac);
 115                         break;
 116                 }
 117         }
 118         return rc;
 119 }
 120
 121 static int qeth_l2_write_mac(struct qeth_card *card, u8 *mac)
 122 {
 123         enum qeth_ipa_cmds cmd = is_multicast_ether_addr(mac) ?
 124                                         IPA_CMD_SETGMAC : IPA_CMD_SETVMAC;
 125         int rc;
 126
 127         QETH_CARD_TEXT(card, 2, "L2Wmac");
 128         rc = qeth_l2_send_setdelmac(card, mac, cmd);
 129         if (rc == -EEXIST)
 130                 QETH_DBF_MESSAGE(2, "MAC already registered on device %x\n",
 131                                  CARD_DEVID(card));
 132         else if (rc)
 133                 QETH_DBF_MESSAGE(2, "Failed to register MAC on device %x: %d\n",
 134                                  CARD_DEVID(card), rc);
 135         return rc;
 136 }
 137
 138 static int qeth_l2_remove_mac(struct qeth_card *card, u8 *mac)
 139 {
 140         enum qeth_ipa_cmds cmd = is_multicast_ether_addr(mac) ?
 141                                         IPA_CMD_DELGMAC : IPA_CMD_DELVMAC;
 142         int rc;
 143
 144         QETH_CARD_TEXT(card, 2, "L2Rmac");
 145         rc = qeth_l2_send_setdelmac(card, mac, cmd);
 146         if (rc)
 147                 QETH_DBF_MESSAGE(2, "Failed to delete MAC on device %u: %d\n",
 148                                  CARD_DEVID(card), rc);
 149         return rc;
 150 }
 151
 152 static void qeth_l2_drain_rx_mode_cache(struct qeth_card *card)
 153 {
 154         struct qeth_mac *mac;
 155         struct hlist_node *tmp;
 156         int i;
 157
 158         hash_for_each_safe(card->mac_htable, i, tmp, mac, hnode) {
 159                 hash_del(&mac->hnode);
 160                 kfree(mac);
 161         }
 162 }
 163
 164 static void qeth_l2_fill_header(struct qeth_qdio_out_q *queue,
 165                                 struct qeth_hdr *hdr, struct sk_buff *skb,
 166                                 int ipv, unsigned int data_len)
 167 {
 168         int cast_type = qeth_get_ether_cast_type(skb);
 169         struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
 170
 171         hdr->hdr.l2.pkt_length = data_len;
 172
 173         if (skb_is_gso(skb)) {
 174                 hdr->hdr.l2.id = QETH_HEADER_TYPE_L2_TSO;
 175         } else {
 176                 hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
 177                 if (skb->ip_summed == CHECKSUM_PARTIAL)
 178                         qeth_tx_csum(skb, &hdr->hdr.l2.flags[1], ipv);
 179         }
 180
 181         /* set byte byte 3 to casting flags */
 182         if (cast_type == RTN_MULTICAST)
 183                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 184         else if (cast_type == RTN_BROADCAST)
 185                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 186         else
 187                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 188
 189         /* VSWITCH relies on the VLAN
 190          * information to be present in
 191          * the QDIO header */
 192         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
 193                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
 194                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
 195         }
 196 }
 197
 198 static int qeth_l2_setdelvlan_makerc(struct qeth_card *card, u16 retcode)
 199 {
 200         if (retcode)
 201                 QETH_CARD_TEXT_(card, 2, "err%04x", retcode);
 202
 203         switch (retcode) {
 204         case IPA_RC_SUCCESS:
 205                 return 0;
 206         case IPA_RC_L2_INVALID_VLAN_ID:
 207                 return -EINVAL;
 208         case IPA_RC_L2_DUP_VLAN_ID:
 209                 return -EEXIST;
 210         case IPA_RC_L2_VLAN_ID_NOT_FOUND:
 211                 return -ENOENT;
 212         case IPA_RC_L2_VLAN_ID_NOT_ALLOWED:
 213                 return -EPERM;
 214         default:
 215                 return -EIO;
 216         }
 217 }
 218
 219 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
 220                                       struct qeth_reply *reply,
 221                                       unsigned long data)
 222 {
 223         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
 224
 225         QETH_CARD_TEXT(card, 2, "L2sdvcb");
 226         if (cmd->hdr.return_code) {
 227                 QETH_DBF_MESSAGE(2, "Error in processing VLAN %u on device %x: %#x.\n",
 228                                  cmd->data.setdelvlan.vlan_id,
 229                                  CARD_DEVID(card), cmd->hdr.return_code);
 230                 QETH_CARD_TEXT_(card, 2, "L2VL%4x", cmd->hdr.command);
 231         }
 232         return qeth_l2_setdelvlan_makerc(card, cmd->hdr.return_code);
 233 }
 234
 235 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
 236                                    enum qeth_ipa_cmds ipacmd)
 237 {
 238         struct qeth_ipa_cmd *cmd;
 239         struct qeth_cmd_buffer *iob;
 240
 241         QETH_CARD_TEXT_(card, 4, "L2sdv%x", ipacmd);
 242         iob = qeth_ipa_alloc_cmd(card, ipacmd, QETH_PROT_IPV4,
 243                                  IPA_DATA_SIZEOF(setdelvlan));
 244         if (!iob)
 245                 return -ENOMEM;
 246         cmd = __ipa_cmd(iob);
 247         cmd->data.setdelvlan.vlan_id = i;
 248         return qeth_send_ipa_cmd(card, iob, qeth_l2_send_setdelvlan_cb, NULL);
 249 }
 250
 251 static int qeth_l2_vlan_rx_add_vid(struct net_device *dev,
 252                                    __be16 proto, u16 vid)
 253 {
 254         struct qeth_card *card = dev->ml_priv;
 255
 256         QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
 257         if (!vid)
 258                 return 0;
 259
 260         return qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
 261 }
 262
 263 static int qeth_l2_vlan_rx_kill_vid(struct net_device *dev,
 264                                     __be16 proto, u16 vid)
 265 {
 266         struct qeth_card *card = dev->ml_priv;
 267
 268         QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
 269         if (!vid)
 270                 return 0;
 271
 272         return qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 273 }
 274
 275 static void qeth_l2_stop_card(struct qeth_card *card)
 276 {
 277         QETH_CARD_TEXT(card, 2, "stopcard");
 278
 279         qeth_set_allowed_threads(card, 0, 1);
 280
 281         cancel_work_sync(&card->rx_mode_work);
 282         qeth_l2_drain_rx_mode_cache(card);
 283
 284         if (card->state == CARD_STATE_SOFTSETUP) {
 285                 qeth_clear_ipacmd_list(card);
 286                 qeth_drain_output_queues(card);
 287                 card->state = CARD_STATE_DOWN;
 288         }
 289
 290         qeth_qdio_clear_card(card, 0);
 291         qeth_clear_working_pool_list(card);
 292         flush_workqueue(card->event_wq);
 293         card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 294         card->info.promisc_mode = 0;
 295 }
 296
 297 static int qeth_l2_request_initial_mac(struct qeth_card *card)
 298 {
 299         int rc = 0;
 300
 301         QETH_CARD_TEXT(card, 2, "l2reqmac");
 302
 303         if (MACHINE_IS_VM) {
 304                 rc = qeth_vm_request_mac(card);
 305                 if (!rc)
 306                         goto out;
 307                 QETH_DBF_MESSAGE(2, "z/VM MAC Service failed on device %x: %#x\n",
 308                                  CARD_DEVID(card), rc);
 309                 QETH_CARD_TEXT_(card, 2, "err%04x", rc);
 310                 /* fall back to alternative mechanism: */
 311         }
 312
 313         if (!IS_OSN(card)) {
 314                 rc = qeth_setadpparms_change_macaddr(card);
 315                 if (!rc)
 316                         goto out;
 317                 QETH_DBF_MESSAGE(2, "READ_MAC Assist failed on device %x: %#x\n",
 318                                  CARD_DEVID(card), rc);
 319                 QETH_CARD_TEXT_(card, 2, "1err%04x", rc);
 320                 /* fall back once more: */
 321         }
 322
 323         /* some devices don't support a custom MAC address: */
 324         if (IS_OSM(card) || IS_OSX(card))
 325                 return (rc) ? rc : -EADDRNOTAVAIL;
 326         eth_hw_addr_random(card->dev);
 327
 328 out:
 329         QETH_CARD_HEX(card, 2, card->dev->dev_addr, card->dev->addr_len);
 330         return 0;
 331 }
 332
 333 static void qeth_l2_register_dev_addr(struct qeth_card *card)
 334 {
 335         if (!is_valid_ether_addr(card->dev->dev_addr))
 336                 qeth_l2_request_initial_mac(card);
 337
 338         if (!IS_OSN(card) && !qeth_l2_send_setmac(card, card->dev->dev_addr))
 339                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 340 }
 341
 342 static int qeth_l2_validate_addr(struct net_device *dev)
 343 {
 344         struct qeth_card *card = dev->ml_priv;
 345
 346         if (card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED)
 347                 return eth_validate_addr(dev);
 348
 349         QETH_CARD_TEXT(card, 4, "nomacadr");
 350         return -EPERM;
 351 }
 352
 353 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 354 {
 355         struct sockaddr *addr = p;
 356         struct qeth_card *card = dev->ml_priv;
 357         u8 old_addr[ETH_ALEN];
 358         int rc = 0;
 359
 360         QETH_CARD_TEXT(card, 3, "setmac");
 361
 362         if (IS_OSM(card) || IS_OSX(card)) {
 363                 QETH_CARD_TEXT(card, 3, "setmcTYP");
 364                 return -EOPNOTSUPP;
 365         }
 366         QETH_CARD_HEX(card, 3, addr->sa_data, ETH_ALEN);
 367         if (!is_valid_ether_addr(addr->sa_data))
 368                 return -EADDRNOTAVAIL;
 369
 370         /* don't register the same address twice */
 371         if (ether_addr_equal_64bits(dev->dev_addr, addr->sa_data) &&
 372             (card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
 373                 return 0;
 374
 375         /* add the new address, switch over, drop the old */
 376         rc = qeth_l2_send_setmac(card, addr->sa_data);
 377         if (rc)
 378                 return rc;
 379         ether_addr_copy(old_addr, dev->dev_addr);
 380         ether_addr_copy(dev->dev_addr, addr->sa_data);
 381
 382         if (card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED)
 383                 qeth_l2_remove_mac(card, old_addr);
 384         card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 385         return 0;
 386 }
 387
 388 static void qeth_l2_promisc_to_bridge(struct qeth_card *card, bool enable)
 389 {
 390         int role;
 391         int rc;
 392
 393         QETH_CARD_TEXT(card, 3, "pmisc2br");
 394
 395         if (enable) {
 396                 if (card->options.sbp.reflect_promisc_primary)
 397                         role = QETH_SBP_ROLE_PRIMARY;
 398                 else
 399                         role = QETH_SBP_ROLE_SECONDARY;
 400         } else
 401                 role = QETH_SBP_ROLE_NONE;
 402
 403         rc = qeth_bridgeport_setrole(card, role);
 404         QETH_CARD_TEXT_(card, 2, "bpm%c%04x", enable ? '+' : '-', rc);
 405         if (!rc) {
 406                 card->options.sbp.role = role;
 407                 card->info.promisc_mode = enable;
 408         }
 409 }
 410
 411 static void qeth_l2_set_promisc_mode(struct qeth_card *card)
 412 {
 413         bool enable = card->dev->flags & IFF_PROMISC;
 414
 415         if (card->info.promisc_mode == enable)
 416                 return;
 417
 418         if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE)) {
 419                 qeth_setadp_promisc_mode(card, enable);
 420         } else {
 421                 mutex_lock(&card->sbp_lock);
 422                 if (card->options.sbp.reflect_promisc)
 423                         qeth_l2_promisc_to_bridge(card, enable);
 424                 mutex_unlock(&card->sbp_lock);
 425         }
 426 }
 427
 428 /* New MAC address is added to the hash table and marked to be written on card
 429  * only if there is not in the hash table storage already
 430  *
 431 */
 432 static void qeth_l2_add_mac(struct qeth_card *card, struct netdev_hw_addr *ha)
 433 {
 434         u32 mac_hash = get_unaligned((u32 *)(&ha->addr[2]));
 435         struct qeth_mac *mac;
 436
 437         hash_for_each_possible(card->mac_htable, mac, hnode, mac_hash) {
 438                 if (ether_addr_equal_64bits(ha->addr, mac->mac_addr)) {
 439                         mac->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
 440                         return;
 441                 }
 442         }
 443
 444         mac = kzalloc(sizeof(struct qeth_mac), GFP_ATOMIC);
 445         if (!mac)
 446                 return;
 447
 448         ether_addr_copy(mac->mac_addr, ha->addr);
 449         mac->disp_flag = QETH_DISP_ADDR_ADD;
 450
 451         hash_add(card->mac_htable, &mac->hnode, mac_hash);
 452 }
 453
 454 static void qeth_l2_rx_mode_work(struct work_struct *work)
 455 {
 456         struct qeth_card *card = container_of(work, struct qeth_card,
 457                                               rx_mode_work);
 458         struct net_device *dev = card->dev;
 459         struct netdev_hw_addr *ha;
 460         struct qeth_mac *mac;
 461         struct hlist_node *tmp;
 462         int i;
 463         int rc;
 464
 465         QETH_CARD_TEXT(card, 3, "setmulti");
 466
 467         netif_addr_lock_bh(dev);
 468         netdev_for_each_mc_addr(ha, dev)
 469                 qeth_l2_add_mac(card, ha);
 470         netdev_for_each_uc_addr(ha, dev)
 471                 qeth_l2_add_mac(card, ha);
 472         netif_addr_unlock_bh(dev);
 473
 474         hash_for_each_safe(card->mac_htable, i, tmp, mac, hnode) {
 475                 switch (mac->disp_flag) {
 476                 case QETH_DISP_ADDR_DELETE:
 477                         qeth_l2_remove_mac(card, mac->mac_addr);
 478                         hash_del(&mac->hnode);
 479                         kfree(mac);
 480                         break;
 481                 case QETH_DISP_ADDR_ADD:
 482                         rc = qeth_l2_write_mac(card, mac->mac_addr);
 483                         if (rc) {
 484                                 hash_del(&mac->hnode);
 485                                 kfree(mac);
 486                                 break;
 487                         }
 488                         /* fall through */
 489                 default:
 490                         /* for next call to set_rx_mode(): */
 491                         mac->disp_flag = QETH_DISP_ADDR_DELETE;
 492                 }
 493         }
 494
 495         qeth_l2_set_promisc_mode(card);
 496 }
 497
 498 static int qeth_l2_xmit_osn(struct qeth_card *card, struct sk_buff *skb,
 499                             struct qeth_qdio_out_q *queue)
 500 {
 501         struct qeth_hdr *hdr = (struct qeth_hdr *)skb->data;
 502         addr_t end = (addr_t)(skb->data + sizeof(*hdr));
 503         addr_t start = (addr_t)skb->data;
 504         unsigned int elements = 0;
 505         unsigned int hd_len = 0;
 506         int rc;
 507
 508         if (skb->protocol == htons(ETH_P_IPV6))
 509                 return -EPROTONOSUPPORT;
 510
 511         if (qeth_get_elements_for_range(start, end) > 1) {
 512                 /* Misaligned HW header, move it to its own buffer element. */
 513                 hdr = kmem_cache_alloc(qeth_core_header_cache, GFP_ATOMIC);
 514                 if (!hdr)
 515                         return -ENOMEM;
 516                 hd_len = sizeof(*hdr);
 517                 skb_copy_from_linear_data(skb, (char *)hdr, hd_len);
 518                 elements++;
 519         }
 520
 521         elements += qeth_count_elements(skb, hd_len);
 522         if (elements > queue->max_elements) {
 523                 rc = -E2BIG;
 524                 goto out;
 525         }
 526
 527         rc = qeth_do_send_packet(card, queue, skb, hdr, hd_len, hd_len,
 528                                  elements);
 529 out:
 530         if (rc && hd_len)
 531                 kmem_cache_free(qeth_core_header_cache, hdr);
 532         return rc;
 533 }
 534
 535 static netdev_tx_t qeth_l2_hard_start_xmit(struct sk_buff *skb,
 536                                            struct net_device *dev)
 537 {
 538         struct qeth_card *card = dev->ml_priv;
 539         u16 txq = skb_get_queue_mapping(skb);
 540         struct qeth_qdio_out_q *queue;
 541         int rc;
 542
 543         if (!skb_is_gso(skb))
 544                 qdisc_skb_cb(skb)->pkt_len = skb->len;
 545         if (IS_IQD(card))
 546                 txq = qeth_iqd_translate_txq(dev, txq);
 547         queue = card->qdio.out_qs[txq];
 548
 549         if (IS_OSN(card))
 550                 rc = qeth_l2_xmit_osn(card, skb, queue);
 551         else
 552                 rc = qeth_xmit(card, skb, queue, qeth_get_ip_version(skb),
 553                                qeth_l2_fill_header);
 554
 555         if (!rc)
 556                 return NETDEV_TX_OK;
 557
 558         QETH_TXQ_STAT_INC(queue, tx_dropped);
 559         kfree_skb(skb);
 560         return NETDEV_TX_OK;
 561 }
 562
 563 static u16 qeth_l2_select_queue(struct net_device *dev, struct sk_buff *skb,
 564                                 struct net_device *sb_dev)
 565 {
 566         struct qeth_card *card = dev->ml_priv;
 567
 568         if (IS_IQD(card))
 569                 return qeth_iqd_select_queue(dev, skb,
 570                                              qeth_get_ether_cast_type(skb),
 571                                              sb_dev);
 572         return qeth_get_priority_queue(card, skb);
 573 }
 574
 575 static const struct device_type qeth_l2_devtype = {
 576         .name = "qeth_layer2",
 577         .groups = qeth_l2_attr_groups,
 578 };
 579
 580 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 581 {
 582         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 583         int rc;
 584
 585         qeth_l2_vnicc_set_defaults(card);
 586         mutex_init(&card->sbp_lock);
 587
 588         if (gdev->dev.type == &qeth_generic_devtype) {
 589                 rc = qeth_l2_create_device_attributes(&gdev->dev);
 590                 if (rc)
 591                         return rc;
 592         }
 593
 594         hash_init(card->mac_htable);
 595         INIT_WORK(&card->rx_mode_work, qeth_l2_rx_mode_work);
 596         return 0;
 597 }
 598
 599 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
 600 {
 601         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
 602
 603         if (cgdev->dev.type == &qeth_generic_devtype)
 604                 qeth_l2_remove_device_attributes(&cgdev->dev);
 605         qeth_set_allowed_threads(card, 0, 1);
 606         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 607
 608         if (cgdev->state == CCWGROUP_ONLINE)
 609                 qeth_set_offline(card, false);
 610
 611         cancel_work_sync(&card->close_dev_work);
 612         if (qeth_netdev_is_registered(card->dev))
 613                 unregister_netdev(card->dev);
 614 }
 615
 616 static void qeth_l2_set_rx_mode(struct net_device *dev)
 617 {
 618         struct qeth_card *card = dev->ml_priv;
 619
 620         schedule_work(&card->rx_mode_work);
 621 }
 622
 623 static const struct net_device_ops qeth_l2_netdev_ops = {
 624         .ndo_open               = qeth_open,
 625         .ndo_stop               = qeth_stop,
 626         .ndo_get_stats64        = qeth_get_stats64,
 627         .ndo_start_xmit         = qeth_l2_hard_start_xmit,
 628         .ndo_features_check     = qeth_features_check,
 629         .ndo_select_queue       = qeth_l2_select_queue,
 630         .ndo_validate_addr      = qeth_l2_validate_addr,
 631         .ndo_set_rx_mode        = qeth_l2_set_rx_mode,
 632         .ndo_do_ioctl           = qeth_do_ioctl,
 633         .ndo_set_mac_address    = qeth_l2_set_mac_address,
 634         .ndo_vlan_rx_add_vid    = qeth_l2_vlan_rx_add_vid,
 635         .ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,
 636         .ndo_tx_timeout         = qeth_tx_timeout,
 637         .ndo_fix_features       = qeth_fix_features,
 638         .ndo_set_features       = qeth_set_features
 639 };
 640
 641 static const struct net_device_ops qeth_osn_netdev_ops = {
 642         .ndo_open               = qeth_open,
 643         .ndo_stop               = qeth_stop,
 644         .ndo_get_stats64        = qeth_get_stats64,
 645         .ndo_start_xmit         = qeth_l2_hard_start_xmit,
 646         .ndo_validate_addr      = eth_validate_addr,
 647         .ndo_tx_timeout         = qeth_tx_timeout,
 648 };
 649
 650 static int qeth_l2_setup_netdev(struct qeth_card *card, bool carrier_ok)
 651 {
 652         int rc;
 653
 654         if (IS_OSN(card)) {
 655                 card->dev->netdev_ops = &qeth_osn_netdev_ops;
 656                 card->dev->flags |= IFF_NOARP;
 657                 goto add_napi;
 658         }
 659
 660         card->dev->needed_headroom = sizeof(struct qeth_hdr);
 661         card->dev->netdev_ops = &qeth_l2_netdev_ops;
 662         card->dev->priv_flags |= IFF_UNICAST_FLT;
 663
 664         if (IS_OSM(card)) {
 665                 card->dev->features |= NETIF_F_VLAN_CHALLENGED;
 666         } else {
 667                 if (!IS_VM_NIC(card))
 668                         card->dev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
 669                 card->dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
 670         }
 671
 672         if (IS_OSD(card) && !IS_VM_NIC(card)) {
 673                 card->dev->features |= NETIF_F_SG;
 674                 /* OSA 3S and earlier has no RX/TX support */
 675                 if (qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM)) {
 676                         card->dev->hw_features |= NETIF_F_IP_CSUM;
 677                         card->dev->vlan_features |= NETIF_F_IP_CSUM;
 678                 }
 679         }
 680         if (qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) {
 681                 card->dev->hw_features |= NETIF_F_IPV6_CSUM;
 682                 card->dev->vlan_features |= NETIF_F_IPV6_CSUM;
 683         }
 684         if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM) ||
 685             qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6)) {
 686                 card->dev->hw_features |= NETIF_F_RXCSUM;
 687                 card->dev->vlan_features |= NETIF_F_RXCSUM;
 688         }
 689         if (qeth_is_supported(card, IPA_OUTBOUND_TSO)) {
 690                 card->dev->hw_features |= NETIF_F_TSO;
 691                 card->dev->vlan_features |= NETIF_F_TSO;
 692         }
 693         if (qeth_is_supported6(card, IPA_OUTBOUND_TSO)) {
 694                 card->dev->hw_features |= NETIF_F_TSO6;
 695                 card->dev->vlan_features |= NETIF_F_TSO6;
 696         }
 697
 698         if (card->dev->hw_features & (NETIF_F_TSO | NETIF_F_TSO6)) {
 699                 card->dev->needed_headroom = sizeof(struct qeth_hdr_tso);
 700                 netif_set_gso_max_size(card->dev,
 701                                        PAGE_SIZE * (QDIO_MAX_ELEMENTS_PER_BUFFER - 1));
 702         }
 703
 704 add_napi:
 705         netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT);
 706         rc = register_netdev(card->dev);
 707         if (!rc && carrier_ok)
 708                 netif_carrier_on(card->dev);
 709
 710         if (rc)
 711                 card->dev->netdev_ops = NULL;
 712         return rc;
 713 }
 714
 715 static void qeth_l2_trace_features(struct qeth_card *card)
 716 {
 717         /* Set BridgePort features */
 718         QETH_CARD_TEXT(card, 2, "featuSBP");
 719         QETH_CARD_HEX(card, 2, &card->options.sbp.supported_funcs,
 720                       sizeof(card->options.sbp.supported_funcs));
 721         /* VNIC Characteristics features */
 722         QETH_CARD_TEXT(card, 2, "feaVNICC");
 723         QETH_CARD_HEX(card, 2, &card->options.vnicc.sup_chars,
 724                       sizeof(card->options.vnicc.sup_chars));
 725 }
 726
 727 static void qeth_l2_setup_bridgeport_attrs(struct qeth_card *card)
 728 {
 729         if (!card->options.sbp.reflect_promisc &&
 730             card->options.sbp.role != QETH_SBP_ROLE_NONE) {
 731                 /* Conditional to avoid spurious error messages */
 732                 qeth_bridgeport_setrole(card, card->options.sbp.role);
 733                 /* Let the callback function refresh the stored role value. */
 734                 qeth_bridgeport_query_ports(card, &card->options.sbp.role,
 735                                             NULL);
 736         }
 737         if (card->options.sbp.hostnotification) {
 738                 if (qeth_bridgeport_an_set(card, 1))
 739                         card->options.sbp.hostnotification = 0;
 740         } else {
 741                 qeth_bridgeport_an_set(card, 0);
 742         }
 743 }
 744
 745 static int qeth_l2_set_online(struct qeth_card *card)
 746 {
 747         struct ccwgroup_device *gdev = card->gdev;
 748         struct net_device *dev = card->dev;
 749         int rc = 0;
 750         bool carrier_ok;
 751
 752         rc = qeth_core_hardsetup_card(card, &carrier_ok);
 753         if (rc) {
 754                 QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
 755                 rc = -ENODEV;
 756                 goto out_remove;
 757         }
 758
 759         mutex_lock(&card->sbp_lock);
 760         qeth_bridgeport_query_support(card);
 761         if (card->options.sbp.supported_funcs) {
 762                 qeth_l2_setup_bridgeport_attrs(card);
 763                 dev_info(&card->gdev->dev,
 764                          "The device represents a Bridge Capable Port\n");
 765         }
 766         mutex_unlock(&card->sbp_lock);
 767
 768         qeth_l2_register_dev_addr(card);
 769
 770         /* for the rx_bcast characteristic, init VNICC after setmac */
 771         qeth_l2_vnicc_init(card);
 772
 773         qeth_trace_features(card);
 774         qeth_l2_trace_features(card);
 775
 776         qeth_print_status_message(card);
 777
 778         /* softsetup */
 779         QETH_CARD_TEXT(card, 2, "softsetp");
 780
 781         card->state = CARD_STATE_SOFTSETUP;
 782
 783         qeth_set_allowed_threads(card, 0xffffffff, 0);
 784
 785         if (!qeth_netdev_is_registered(dev)) {
 786                 rc = qeth_l2_setup_netdev(card, carrier_ok);
 787                 if (rc)
 788                         goto out_remove;
 789         } else {
 790                 rtnl_lock();
 791                 if (carrier_ok)
 792                         netif_carrier_on(dev);
 793                 else
 794                         netif_carrier_off(dev);
 795
 796                 netif_device_attach(dev);
 797                 qeth_enable_hw_features(dev);
 798
 799                 if (card->info.open_when_online) {
 800                         card->info.open_when_online = 0;
 801                         dev_open(dev, NULL);
 802                 }
 803                 rtnl_unlock();
 804         }
 805         /* let user_space know that device is online */
 806         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
 807         return 0;
 808
 809 out_remove:
 810         qeth_l2_stop_card(card);
 811         qeth_stop_channel(&card->data);
 812         qeth_stop_channel(&card->write);
 813         qeth_stop_channel(&card->read);
 814         qdio_free(CARD_DDEV(card));
 815         return rc;
 816 }
 817
 818 static void qeth_l2_set_offline(struct qeth_card *card)
 819 {
 820         qeth_l2_stop_card(card);
 821 }
 822
 823 static int __init qeth_l2_init(void)
 824 {
 825         pr_info("register layer 2 discipline\n");
 826         return 0;
 827 }
 828
 829 static void __exit qeth_l2_exit(void)
 830 {
 831         pr_info("unregister layer 2 discipline\n");
 832 }
 833
 834 /* Returns zero if the command is successfully "consumed" */
 835 static int qeth_l2_control_event(struct qeth_card *card,
 836                                         struct qeth_ipa_cmd *cmd)
 837 {
 838         switch (cmd->hdr.command) {
 839         case IPA_CMD_SETBRIDGEPORT_OSA:
 840         case IPA_CMD_SETBRIDGEPORT_IQD:
 841                 if (cmd->data.sbp.hdr.command_code ==
 842                                 IPA_SBP_BRIDGE_PORT_STATE_CHANGE) {
 843                         qeth_bridge_state_change(card, cmd);
 844                         return 0;
 845                 } else
 846                         return 1;
 847         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
 848                 qeth_bridge_host_event(card, cmd);
 849                 return 0;
 850         default:
 851                 return 1;
 852         }
 853 }
 854
 855 struct qeth_discipline qeth_l2_discipline = {
 856         .devtype = &qeth_l2_devtype,
 857         .setup = qeth_l2_probe_device,
 858         .remove = qeth_l2_remove_device,
 859         .set_online = qeth_l2_set_online,
 860         .set_offline = qeth_l2_set_offline,
 861         .do_ioctl = NULL,
 862         .control_event_handler = qeth_l2_control_event,
 863 };
 864 EXPORT_SYMBOL_GPL(qeth_l2_discipline);
 865
 866 static void qeth_osn_assist_cb(struct qeth_card *card,
 867                                struct qeth_cmd_buffer *iob,
 868                                unsigned int data_length)
 869 {
 870         qeth_notify_cmd(iob, 0);
 871         qeth_put_cmd(iob);
 872 }
 873
 874 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
 875 {
 876         struct qeth_cmd_buffer *iob;
 877         struct qeth_card *card;
 878
 879         if (data_len < 0)
 880                 return -EINVAL;
 881         if (!dev)
 882                 return -ENODEV;
 883         card = dev->ml_priv;
 884         if (!card)
 885                 return -ENODEV;
 886         QETH_CARD_TEXT(card, 2, "osnsdmc");
 887         if (!qeth_card_hw_is_reachable(card))
 888                 return -ENODEV;
 889
 890         iob = qeth_alloc_cmd(&card->write, IPA_PDU_HEADER_SIZE + data_len, 1,
 891                              QETH_IPA_TIMEOUT);
 892         if (!iob)
 893                 return -ENOMEM;
 894
 895         qeth_prepare_ipa_cmd(card, iob, (u16) data_len, NULL);
 896
 897         memcpy(__ipa_cmd(iob), data, data_len);
 898         iob->callback = qeth_osn_assist_cb;
 899         return qeth_send_ipa_cmd(card, iob, NULL, NULL);
 900 }
 901 EXPORT_SYMBOL(qeth_osn_assist);
 902
 903 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
 904                   int (*assist_cb)(struct net_device *, void *),
 905                   int (*data_cb)(struct sk_buff *))
 906 {
 907         struct qeth_card *card;
 908         char bus_id[16];
 909         u16 devno;
 910
 911         memcpy(&devno, read_dev_no, 2);
 912         sprintf(bus_id, "0.0.%04x", devno);
 913         card = qeth_get_card_by_busid(bus_id);
 914         if (!card || !IS_OSN(card))
 915                 return -ENODEV;
 916         *dev = card->dev;
 917
 918         QETH_CARD_TEXT(card, 2, "osnreg");
 919         if ((assist_cb == NULL) || (data_cb == NULL))
 920                 return -EINVAL;
 921         card->osn_info.assist_cb = assist_cb;
 922         card->osn_info.data_cb = data_cb;
 923         return 0;
 924 }
 925 EXPORT_SYMBOL(qeth_osn_register);
 926
 927 void qeth_osn_deregister(struct net_device *dev)
 928 {
 929         struct qeth_card *card;
 930
 931         if (!dev)
 932                 return;
 933         card = dev->ml_priv;
 934         if (!card)
 935                 return;
 936         QETH_CARD_TEXT(card, 2, "osndereg");
 937         card->osn_info.assist_cb = NULL;
 938         card->osn_info.data_cb = NULL;
 939         return;
 940 }
 941 EXPORT_SYMBOL(qeth_osn_deregister);
 942
 943 /* SETBRIDGEPORT support, async notifications */
 944
 945 enum qeth_an_event_type {anev_reg_unreg, anev_abort, anev_reset};
 946
 947 /**
 948  * qeth_bridge_emit_host_event() - bridgeport address change notification
 949  * @card:  qeth_card structure pointer, for udev events.
 950  * @evtype:  "normal" register/unregister, or abort, or reset. For abort
 951  *            and reset token and addr_lnid are unused and may be NULL.
 952  * @code:  event bitmask: high order bit 0x80 value 1 means removal of an
 953  *                        object, 0 - addition of an object.
 954  *                        0x01 - VLAN, 0x02 - MAC, 0x03 - VLAN and MAC.
 955  * @token: "network token" structure identifying physical address of the port.
 956  * @addr_lnid: pointer to structure with MAC address and VLAN ID.
 957  *
 958  * This function is called when registrations and deregistrations are
 959  * reported by the hardware, and also when notifications are enabled -
 960  * for all currently registered addresses.
 961  */
 962 static void qeth_bridge_emit_host_event(struct qeth_card *card,
 963         enum qeth_an_event_type evtype,
 964         u8 code, struct net_if_token *token, struct mac_addr_lnid *addr_lnid)
 965 {
 966         char str[7][32];
 967         char *env[8];
 968         int i = 0;
 969
 970         switch (evtype) {
 971         case anev_reg_unreg:
 972                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=%s",
 973                                 (code & IPA_ADDR_CHANGE_CODE_REMOVAL)
 974                                 ? "deregister" : "register");
 975                 env[i] = str[i]; i++;
 976                 if (code & IPA_ADDR_CHANGE_CODE_VLANID) {
 977                         snprintf(str[i], sizeof(str[i]), "VLAN=%d",
 978                                 addr_lnid->lnid);
 979                         env[i] = str[i]; i++;
 980                 }
 981                 if (code & IPA_ADDR_CHANGE_CODE_MACADDR) {
 982                         snprintf(str[i], sizeof(str[i]), "MAC=%pM",
 983                                 addr_lnid->mac);
 984                         env[i] = str[i]; i++;
 985                 }
 986                 snprintf(str[i], sizeof(str[i]), "NTOK_BUSID=%x.%x.%04x",
 987                         token->cssid, token->ssid, token->devnum);
 988                 env[i] = str[i]; i++;
 989                 snprintf(str[i], sizeof(str[i]), "NTOK_IID=%02x", token->iid);
 990                 env[i] = str[i]; i++;
 991                 snprintf(str[i], sizeof(str[i]), "NTOK_CHPID=%02x",
 992                                 token->chpid);
 993                 env[i] = str[i]; i++;
 994                 snprintf(str[i], sizeof(str[i]), "NTOK_CHID=%04x", token->chid);
 995                 env[i] = str[i]; i++;
 996                 break;
 997         case anev_abort:
 998                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=abort");
 999                 env[i] = str[i]; i++;
1000                 break;
1001         case anev_reset:
1002                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=reset");
1003                 env[i] = str[i]; i++;
1004                 break;
1005         }
1006         env[i] = NULL;
1007         kobject_uevent_env(&card->gdev->dev.kobj, KOBJ_CHANGE, env);
1008 }
1009
1010 struct qeth_bridge_state_data {
1011         struct work_struct worker;
1012         struct qeth_card *card;
1013         struct qeth_sbp_state_change qports;
1014 };
1015
1016 static void qeth_bridge_state_change_worker(struct work_struct *work)
1017 {
1018         struct qeth_bridge_state_data *data =
1019                 container_of(work, struct qeth_bridge_state_data, worker);
1020         /* We are only interested in the first entry - local port */
1021         struct qeth_sbp_port_entry *entry = &data->qports.entry[0];
1022         char env_locrem[32];
1023         char env_role[32];
1024         char env_state[32];
1025         char *env[] = {
1026                 env_locrem,
1027                 env_role,
1028                 env_state,
1029                 NULL
1030         };
1031
1032         /* Role should not change by itself, but if it did, */
1033         /* information from the hardware is authoritative.  */
1034         mutex_lock(&data->card->sbp_lock);
1035         data->card->options.sbp.role = entry->role;
1036         mutex_unlock(&data->card->sbp_lock);
1037
1038         snprintf(env_locrem, sizeof(env_locrem), "BRIDGEPORT=statechange");
1039         snprintf(env_role, sizeof(env_role), "ROLE=%s",
1040                 (entry->role == QETH_SBP_ROLE_NONE) ? "none" :
1041                 (entry->role == QETH_SBP_ROLE_PRIMARY) ? "primary" :
1042                 (entry->role == QETH_SBP_ROLE_SECONDARY) ? "secondary" :
1043                 "<INVALID>");
1044         snprintf(env_state, sizeof(env_state), "STATE=%s",
1045                 (entry->state == QETH_SBP_STATE_INACTIVE) ? "inactive" :
1046                 (entry->state == QETH_SBP_STATE_STANDBY) ? "standby" :
1047                 (entry->state == QETH_SBP_STATE_ACTIVE) ? "active" :
1048                 "<INVALID>");
1049         kobject_uevent_env(&data->card->gdev->dev.kobj,
1050                                 KOBJ_CHANGE, env);
1051         kfree(data);
1052 }
1053
1054 static void qeth_bridge_state_change(struct qeth_card *card,
1055                                         struct qeth_ipa_cmd *cmd)
1056 {
1057         struct qeth_sbp_state_change *qports =
1058                  &cmd->data.sbp.data.state_change;
1059         struct qeth_bridge_state_data *data;
1060         int extrasize;
1061
1062         QETH_CARD_TEXT(card, 2, "brstchng");
1063         if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1064                 QETH_CARD_TEXT_(card, 2, "BPsz%04x", qports->entry_length);
1065                 return;
1066         }
1067         extrasize = sizeof(struct qeth_sbp_port_entry) * qports->num_entries;
1068         data = kzalloc(sizeof(struct qeth_bridge_state_data) + extrasize,
1069                 GFP_ATOMIC);
1070         if (!data) {
1071                 QETH_CARD_TEXT(card, 2, "BPSalloc");
1072                 return;
1073         }
1074         INIT_WORK(&data->worker, qeth_bridge_state_change_worker);
1075         data->card = card;
1076         memcpy(&data->qports, qports,
1077                         sizeof(struct qeth_sbp_state_change) + extrasize);
1078         queue_work(card->event_wq, &data->worker);
1079 }
1080
1081 struct qeth_bridge_host_data {
1082         struct work_struct worker;
1083         struct qeth_card *card;
1084         struct qeth_ipacmd_addr_change hostevs;
1085 };
1086
1087 static void qeth_bridge_host_event_worker(struct work_struct *work)
1088 {
1089         struct qeth_bridge_host_data *data =
1090                 container_of(work, struct qeth_bridge_host_data, worker);
1091         int i;
1092
1093         if (data->hostevs.lost_event_mask) {
1094                 dev_info(&data->card->gdev->dev,
1095 "Address notification from the Bridge Port stopped %s (%s)\n",
1096                         data->card->dev->name,
1097                         (data->hostevs.lost_event_mask == 0x01)
1098                         ? "Overflow"
1099                         : (data->hostevs.lost_event_mask == 0x02)
1100                         ? "Bridge port state change"
1101                         : "Unknown reason");
1102                 mutex_lock(&data->card->sbp_lock);
1103                 data->card->options.sbp.hostnotification = 0;
1104                 mutex_unlock(&data->card->sbp_lock);
1105                 qeth_bridge_emit_host_event(data->card, anev_abort,
1106                         0, NULL, NULL);
1107         } else
1108                 for (i = 0; i < data->hostevs.num_entries; i++) {
1109                         struct qeth_ipacmd_addr_change_entry *entry =
1110                                         &data->hostevs.entry[i];
1111                         qeth_bridge_emit_host_event(data->card,
1112                                         anev_reg_unreg,
1113                                         entry->change_code,
1114                                         &entry->token, &entry->addr_lnid);
1115                 }
1116         kfree(data);
1117 }
1118
1119 static void qeth_bridge_host_event(struct qeth_card *card,
1120                                         struct qeth_ipa_cmd *cmd)
1121 {
1122         struct qeth_ipacmd_addr_change *hostevs =
1123                  &cmd->data.addrchange;
1124         struct qeth_bridge_host_data *data;
1125         int extrasize;
1126
1127         QETH_CARD_TEXT(card, 2, "brhostev");
1128         if (cmd->hdr.return_code != 0x0000) {
1129                 if (cmd->hdr.return_code == 0x0010) {
1130                         if (hostevs->lost_event_mask == 0x00)
1131                                 hostevs->lost_event_mask = 0xff;
1132                 } else {
1133                         QETH_CARD_TEXT_(card, 2, "BPHe%04x",
1134                                 cmd->hdr.return_code);
1135                         return;
1136                 }
1137         }
1138         extrasize = sizeof(struct qeth_ipacmd_addr_change_entry) *
1139                                                 hostevs->num_entries;
1140         data = kzalloc(sizeof(struct qeth_bridge_host_data) + extrasize,
1141                 GFP_ATOMIC);
1142         if (!data) {
1143                 QETH_CARD_TEXT(card, 2, "BPHalloc");
1144                 return;
1145         }
1146         INIT_WORK(&data->worker, qeth_bridge_host_event_worker);
1147         data->card = card;
1148         memcpy(&data->hostevs, hostevs,
1149                         sizeof(struct qeth_ipacmd_addr_change) + extrasize);
1150         queue_work(card->event_wq, &data->worker);
1151 }
1152
1153 /* SETBRIDGEPORT support; sending commands */
1154
1155 struct _qeth_sbp_cbctl {
1156         union {
1157                 u32 supported;
1158                 struct {
1159                         enum qeth_sbp_roles *role;
1160                         enum qeth_sbp_states *state;
1161                 } qports;
1162         } data;
1163 };
1164
1165 static int qeth_bridgeport_makerc(struct qeth_card *card,
1166                                   struct qeth_ipa_cmd *cmd)
1167 {
1168         struct qeth_ipacmd_setbridgeport *sbp = &cmd->data.sbp;
1169         enum qeth_ipa_sbp_cmd setcmd = sbp->hdr.command_code;
1170         u16 ipa_rc = cmd->hdr.return_code;
1171         u16 sbp_rc = sbp->hdr.return_code;
1172         int rc;
1173
1174         if (ipa_rc == IPA_RC_SUCCESS && sbp_rc == IPA_RC_SUCCESS)
1175                 return 0;
1176
1177         if ((IS_IQD(card) && ipa_rc == IPA_RC_SUCCESS) ||
1178             (!IS_IQD(card) && ipa_rc == sbp_rc)) {
1179                 switch (sbp_rc) {
1180                 case IPA_RC_SUCCESS:
1181                         rc = 0;
1182                         break;
1183                 case IPA_RC_L2_UNSUPPORTED_CMD:
1184                 case IPA_RC_UNSUPPORTED_COMMAND:
1185                         rc = -EOPNOTSUPP;
1186                         break;
1187                 case IPA_RC_SBP_OSA_NOT_CONFIGURED:
1188                 case IPA_RC_SBP_IQD_NOT_CONFIGURED:
1189                         rc = -ENODEV; /* maybe not the best code here? */
1190                         dev_err(&card->gdev->dev,
1191         "The device is not configured as a Bridge Port\n");
1192                         break;
1193                 case IPA_RC_SBP_OSA_OS_MISMATCH:
1194                 case IPA_RC_SBP_IQD_OS_MISMATCH:
1195                         rc = -EPERM;
1196                         dev_err(&card->gdev->dev,
1197         "A Bridge Port is already configured by a different operating system\n");
1198                         break;
1199                 case IPA_RC_SBP_OSA_ANO_DEV_PRIMARY:
1200                 case IPA_RC_SBP_IQD_ANO_DEV_PRIMARY:
1201                         switch (setcmd) {
1202                         case IPA_SBP_SET_PRIMARY_BRIDGE_PORT:
1203                                 rc = -EEXIST;
1204                                 dev_err(&card->gdev->dev,
1205         "The LAN already has a primary Bridge Port\n");
1206                                 break;
1207                         case IPA_SBP_SET_SECONDARY_BRIDGE_PORT:
1208                                 rc = -EBUSY;
1209                                 dev_err(&card->gdev->dev,
1210         "The device is already a primary Bridge Port\n");
1211                                 break;
1212                         default:
1213                                 rc = -EIO;
1214                         }
1215                         break;
1216                 case IPA_RC_SBP_OSA_CURRENT_SECOND:
1217                 case IPA_RC_SBP_IQD_CURRENT_SECOND:
1218                         rc = -EBUSY;
1219                         dev_err(&card->gdev->dev,
1220         "The device is already a secondary Bridge Port\n");
1221                         break;
1222                 case IPA_RC_SBP_OSA_LIMIT_SECOND:
1223                 case IPA_RC_SBP_IQD_LIMIT_SECOND:
1224                         rc = -EEXIST;
1225                         dev_err(&card->gdev->dev,
1226         "The LAN cannot have more secondary Bridge Ports\n");
1227                         break;
1228                 case IPA_RC_SBP_OSA_CURRENT_PRIMARY:
1229                 case IPA_RC_SBP_IQD_CURRENT_PRIMARY:
1230                         rc = -EBUSY;
1231                         dev_err(&card->gdev->dev,
1232         "The device is already a primary Bridge Port\n");
1233                         break;
1234                 case IPA_RC_SBP_OSA_NOT_AUTHD_BY_ZMAN:
1235                 case IPA_RC_SBP_IQD_NOT_AUTHD_BY_ZMAN:
1236                         rc = -EACCES;
1237                         dev_err(&card->gdev->dev,
1238         "The device is not authorized to be a Bridge Port\n");
1239                         break;
1240                 default:
1241                         rc = -EIO;
1242                 }
1243         } else {
1244                 switch (ipa_rc) {
1245                 case IPA_RC_NOTSUPP:
1246                         rc = -EOPNOTSUPP;
1247                         break;
1248                 case IPA_RC_UNSUPPORTED_COMMAND:
1249                         rc = -EOPNOTSUPP;
1250                         break;
1251                 default:
1252                         rc = -EIO;
1253                 }
1254         }
1255
1256         if (rc) {
1257                 QETH_CARD_TEXT_(card, 2, "SBPi%04x", ipa_rc);
1258                 QETH_CARD_TEXT_(card, 2, "SBPc%04x", sbp_rc);
1259         }
1260         return rc;
1261 }
1262
1263 static struct qeth_cmd_buffer *qeth_sbp_build_cmd(struct qeth_card *card,
1264                                                   enum qeth_ipa_sbp_cmd sbp_cmd,
1265                                                   unsigned int data_length)
1266 {
1267         enum qeth_ipa_cmds ipa_cmd = IS_IQD(card) ? IPA_CMD_SETBRIDGEPORT_IQD :
1268                                                     IPA_CMD_SETBRIDGEPORT_OSA;
1269         struct qeth_ipacmd_sbp_hdr *hdr;
1270         struct qeth_cmd_buffer *iob;
1271
1272         iob = qeth_ipa_alloc_cmd(card, ipa_cmd, QETH_PROT_NONE,
1273                                  data_length +
1274                                  offsetof(struct qeth_ipacmd_setbridgeport,
1275                                           data));
1276         if (!iob)
1277                 return iob;
1278
1279         hdr = &__ipa_cmd(iob)->data.sbp.hdr;
1280         hdr->cmdlength = sizeof(*hdr) + data_length;
1281         hdr->command_code = sbp_cmd;
1282         hdr->used_total = 1;
1283         hdr->seq_no = 1;
1284         return iob;
1285 }
1286
1287 static int qeth_bridgeport_query_support_cb(struct qeth_card *card,
1288         struct qeth_reply *reply, unsigned long data)
1289 {
1290         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1291         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1292         int rc;
1293
1294         QETH_CARD_TEXT(card, 2, "brqsupcb");
1295         rc = qeth_bridgeport_makerc(card, cmd);
1296         if (rc)
1297                 return rc;
1298
1299         cbctl->data.supported =
1300                 cmd->data.sbp.data.query_cmds_supp.supported_cmds;
1301         return 0;
1302 }
1303
1304 /**
1305  * qeth_bridgeport_query_support() - store bitmask of supported subfunctions.
1306  * @card:                            qeth_card structure pointer.
1307  *
1308  * Sets bitmask of supported setbridgeport subfunctions in the qeth_card
1309  * strucutre: card->options.sbp.supported_funcs.
1310  */
1311 static void qeth_bridgeport_query_support(struct qeth_card *card)
1312 {
1313         struct qeth_cmd_buffer *iob;
1314         struct _qeth_sbp_cbctl cbctl;
1315
1316         QETH_CARD_TEXT(card, 2, "brqsuppo");
1317         iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_COMMANDS_SUPPORTED,
1318                                  SBP_DATA_SIZEOF(query_cmds_supp));
1319         if (!iob)
1320                 return;
1321
1322         if (qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_support_cb,
1323                               &cbctl)) {
1324                 card->options.sbp.role = QETH_SBP_ROLE_NONE;
1325                 card->options.sbp.supported_funcs = 0;
1326                 return;
1327         }
1328         card->options.sbp.supported_funcs = cbctl.data.supported;
1329 }
1330
1331 static int qeth_bridgeport_query_ports_cb(struct qeth_card *card,
1332         struct qeth_reply *reply, unsigned long data)
1333 {
1334         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1335         struct qeth_sbp_query_ports *qports = &cmd->data.sbp.data.query_ports;
1336         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1337         int rc;
1338
1339         QETH_CARD_TEXT(card, 2, "brqprtcb");
1340         rc = qeth_bridgeport_makerc(card, cmd);
1341         if (rc)
1342                 return rc;
1343
1344         if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1345                 QETH_CARD_TEXT_(card, 2, "SBPs%04x", qports->entry_length);
1346                 return -EINVAL;
1347         }
1348         /* first entry contains the state of the local port */
1349         if (qports->num_entries > 0) {
1350                 if (cbctl->data.qports.role)
1351                         *cbctl->data.qports.role = qports->entry[0].role;
1352                 if (cbctl->data.qports.state)
1353                         *cbctl->data.qports.state = qports->entry[0].state;
1354         }
1355         return 0;
1356 }
1357
1358 /**
1359  * qeth_bridgeport_query_ports() - query local bridgeport status.
1360  * @card:                          qeth_card structure pointer.
1361  * @role:   Role of the port: 0-none, 1-primary, 2-secondary.
1362  * @state:  State of the port: 0-inactive, 1-standby, 2-active.
1363  *
1364  * Returns negative errno-compatible error indication or 0 on success.
1365  *
1366  * 'role' and 'state' are not updated in case of hardware operation failure.
1367  */
1368 int qeth_bridgeport_query_ports(struct qeth_card *card,
1369         enum qeth_sbp_roles *role, enum qeth_sbp_states *state)
1370 {
1371         struct qeth_cmd_buffer *iob;
1372         struct _qeth_sbp_cbctl cbctl = {
1373                 .data = {
1374                         .qports = {
1375                                 .role = role,
1376                                 .state = state,
1377                         },
1378                 },
1379         };
1380
1381         QETH_CARD_TEXT(card, 2, "brqports");
1382         if (!(card->options.sbp.supported_funcs & IPA_SBP_QUERY_BRIDGE_PORTS))
1383                 return -EOPNOTSUPP;
1384         iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_BRIDGE_PORTS, 0);
1385         if (!iob)
1386                 return -ENOMEM;
1387
1388         return qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_ports_cb,
1389                                  &cbctl);
1390 }
1391
1392 static int qeth_bridgeport_set_cb(struct qeth_card *card,
1393         struct qeth_reply *reply, unsigned long data)
1394 {
1395         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
1396
1397         QETH_CARD_TEXT(card, 2, "brsetrcb");
1398         return qeth_bridgeport_makerc(card, cmd);
1399 }
1400
1401 /**
1402  * qeth_bridgeport_setrole() - Assign primary role to the port.
1403  * @card:                      qeth_card structure pointer.
1404  * @role:                      Role to assign.
1405  *
1406  * Returns negative errno-compatible error indication or 0 on success.
1407  */
1408 int qeth_bridgeport_setrole(struct qeth_card *card, enum qeth_sbp_roles role)
1409 {
1410         struct qeth_cmd_buffer *iob;
1411         enum qeth_ipa_sbp_cmd setcmd;
1412         unsigned int cmdlength = 0;
1413
1414         QETH_CARD_TEXT(card, 2, "brsetrol");
1415         switch (role) {
1416         case QETH_SBP_ROLE_NONE:
1417                 setcmd = IPA_SBP_RESET_BRIDGE_PORT_ROLE;
1418                 break;
1419         case QETH_SBP_ROLE_PRIMARY:
1420                 setcmd = IPA_SBP_SET_PRIMARY_BRIDGE_PORT;
1421                 cmdlength = SBP_DATA_SIZEOF(set_primary);
1422                 break;
1423         case QETH_SBP_ROLE_SECONDARY:
1424                 setcmd = IPA_SBP_SET_SECONDARY_BRIDGE_PORT;
1425                 break;
1426         default:
1427                 return -EINVAL;
1428         }
1429         if (!(card->options.sbp.supported_funcs & setcmd))
1430                 return -EOPNOTSUPP;
1431         iob = qeth_sbp_build_cmd(card, setcmd, cmdlength);
1432         if (!iob)
1433                 return -ENOMEM;
1434
1435         return qeth_send_ipa_cmd(card, iob, qeth_bridgeport_set_cb, NULL);
1436 }
1437
1438 /**
1439  * qeth_anset_makerc() - derive "traditional" error from hardware codes.
1440  * @card:                     qeth_card structure pointer, for debug messages.
1441  *
1442  * Returns negative errno-compatible error indication or 0 on success.
1443  */
1444 static int qeth_anset_makerc(struct qeth_card *card, int pnso_rc, u16 response)
1445 {
1446         int rc;
1447
1448         if (pnso_rc == 0)
1449                 switch (response) {
1450                 case 0x0001:
1451                         rc = 0;
1452                         break;
1453                 case 0x0004:
1454                 case 0x0100:
1455                 case 0x0106:
1456                         rc = -EOPNOTSUPP;
1457                         dev_err(&card->gdev->dev,
1458                                 "Setting address notification failed\n");
1459                         break;
1460                 case 0x0107:
1461                         rc = -EAGAIN;
1462                         break;
1463                 default:
1464                         rc = -EIO;
1465                 }
1466         else
1467                 rc = -EIO;
1468
1469         if (rc) {
1470                 QETH_CARD_TEXT_(card, 2, "SBPp%04x", pnso_rc);
1471                 QETH_CARD_TEXT_(card, 2, "SBPr%04x", response);
1472         }
1473         return rc;
1474 }
1475
1476 static void qeth_bridgeport_an_set_cb(void *priv,
1477                 enum qdio_brinfo_entry_type type, void *entry)
1478 {
1479         struct qeth_card *card = (struct qeth_card *)priv;
1480         struct qdio_brinfo_entry_l2 *l2entry;
1481         u8 code;
1482
1483         if (type != l2_addr_lnid) {
1484                 WARN_ON_ONCE(1);
1485                 return;
1486         }
1487
1488         l2entry = (struct qdio_brinfo_entry_l2 *)entry;
1489         code = IPA_ADDR_CHANGE_CODE_MACADDR;
1490         if (l2entry->addr_lnid.lnid < VLAN_N_VID)
1491                 code |= IPA_ADDR_CHANGE_CODE_VLANID;
1492         qeth_bridge_emit_host_event(card, anev_reg_unreg, code,
1493                 (struct net_if_token *)&l2entry->nit,
1494                 (struct mac_addr_lnid *)&l2entry->addr_lnid);
1495 }
1496
1497 /**
1498  * qeth_bridgeport_an_set() - Enable or disable bridgeport address notification
1499  * @card:                     qeth_card structure pointer.
1500  * @enable:                   0 - disable, non-zero - enable notifications
1501  *
1502  * Returns negative errno-compatible error indication or 0 on success.
1503  *
1504  * On enable, emits a series of address notifications udev events for all
1505  * currently registered hosts.
1506  */
1507 int qeth_bridgeport_an_set(struct qeth_card *card, int enable)
1508 {
1509         int rc;
1510         u16 response;
1511         struct ccw_device *ddev;
1512         struct subchannel_id schid;
1513
1514         if (!card)
1515                 return -EINVAL;
1516         if (!card->options.sbp.supported_funcs)
1517                 return -EOPNOTSUPP;
1518         ddev = CARD_DDEV(card);
1519         ccw_device_get_schid(ddev, &schid);
1520
1521         if (enable) {
1522                 qeth_bridge_emit_host_event(card, anev_reset, 0, NULL, NULL);
1523                 rc = qdio_pnso_brinfo(schid, 1, &response,
1524                         qeth_bridgeport_an_set_cb, card);
1525         } else
1526                 rc = qdio_pnso_brinfo(schid, 0, &response, NULL, NULL);
1527         return qeth_anset_makerc(card, rc, response);
1528 }
1529
1530 static bool qeth_bridgeport_is_in_use(struct qeth_card *card)
1531 {
1532         return (card->options.sbp.role || card->options.sbp.reflect_promisc ||
1533                 card->options.sbp.hostnotification);
1534 }
1535
1536 /* VNIC Characteristics support */
1537
1538 /* handle VNICC IPA command return codes; convert to error codes */
1539 static int qeth_l2_vnicc_makerc(struct qeth_card *card, u16 ipa_rc)
1540 {
1541         int rc;
1542
1543         switch (ipa_rc) {
1544         case IPA_RC_SUCCESS:
1545                 return ipa_rc;
1546         case IPA_RC_L2_UNSUPPORTED_CMD:
1547         case IPA_RC_NOTSUPP:
1548                 rc = -EOPNOTSUPP;
1549                 break;
1550         case IPA_RC_VNICC_OOSEQ:
1551                 rc = -EALREADY;
1552                 break;
1553         case IPA_RC_VNICC_VNICBP:
1554                 rc = -EBUSY;
1555                 break;
1556         case IPA_RC_L2_ADDR_TABLE_FULL:
1557                 rc = -ENOSPC;
1558                 break;
1559         case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
1560                 rc = -EACCES;
1561                 break;
1562         default:
1563                 rc = -EIO;
1564         }
1565
1566         QETH_CARD_TEXT_(card, 2, "err%04x", ipa_rc);
1567         return rc;
1568 }
1569
1570 /* generic VNICC request call back control */
1571 struct _qeth_l2_vnicc_request_cbctl {
1572         struct {
1573                 union{
1574                         u32 *sup_cmds;
1575                         u32 *timeout;
1576                 };
1577         } result;
1578 };
1579
1580 /* generic VNICC request call back */
1581 static int qeth_l2_vnicc_request_cb(struct qeth_card *card,
1582                                     struct qeth_reply *reply,
1583                                     unsigned long data)
1584 {
1585         struct _qeth_l2_vnicc_request_cbctl *cbctl =
1586                 (struct _qeth_l2_vnicc_request_cbctl *) reply->param;
1587         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1588         struct qeth_ipacmd_vnicc *rep = &cmd->data.vnicc;
1589         u32 sub_cmd = cmd->data.vnicc.hdr.sub_command;
1590
1591         QETH_CARD_TEXT(card, 2, "vniccrcb");
1592         if (cmd->hdr.return_code)
1593                 return qeth_l2_vnicc_makerc(card, cmd->hdr.return_code);
1594         /* return results to caller */
1595         card->options.vnicc.sup_chars = rep->vnicc_cmds.supported;
1596         card->options.vnicc.cur_chars = rep->vnicc_cmds.enabled;
1597
1598         if (sub_cmd == IPA_VNICC_QUERY_CMDS)
1599                 *cbctl->result.sup_cmds = rep->data.query_cmds.sup_cmds;
1600         else if (sub_cmd == IPA_VNICC_GET_TIMEOUT)
1601                 *cbctl->result.timeout = rep->data.getset_timeout.timeout;
1602
1603         return 0;
1604 }
1605
1606 static struct qeth_cmd_buffer *qeth_l2_vnicc_build_cmd(struct qeth_card *card,
1607                                                        u32 vnicc_cmd,
1608                                                        unsigned int data_length)
1609 {
1610         struct qeth_ipacmd_vnicc_hdr *hdr;
1611         struct qeth_cmd_buffer *iob;
1612
1613         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_VNICC, QETH_PROT_NONE,
1614                                  data_length +
1615                                  offsetof(struct qeth_ipacmd_vnicc, data));
1616         if (!iob)
1617                 return NULL;
1618
1619         hdr = &__ipa_cmd(iob)->data.vnicc.hdr;
1620         hdr->data_length = sizeof(*hdr) + data_length;
1621         hdr->sub_command = vnicc_cmd;
1622         return iob;
1623 }
1624
1625 /* VNICC query VNIC characteristics request */
1626 static int qeth_l2_vnicc_query_chars(struct qeth_card *card)
1627 {
1628         struct qeth_cmd_buffer *iob;
1629
1630         QETH_CARD_TEXT(card, 2, "vniccqch");
1631         iob = qeth_l2_vnicc_build_cmd(card, IPA_VNICC_QUERY_CHARS, 0);
1632         if (!iob)
1633                 return -ENOMEM;
1634
1635         return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, NULL);
1636 }
1637
1638 /* VNICC query sub commands request */
1639 static int qeth_l2_vnicc_query_cmds(struct qeth_card *card, u32 vnic_char,
1640                                     u32 *sup_cmds)
1641 {
1642         struct _qeth_l2_vnicc_request_cbctl cbctl;
1643         struct qeth_cmd_buffer *iob;
1644
1645         QETH_CARD_TEXT(card, 2, "vniccqcm");
1646         iob = qeth_l2_vnicc_build_cmd(card, IPA_VNICC_QUERY_CMDS,
1647                                       VNICC_DATA_SIZEOF(query_cmds));
1648         if (!iob)
1649                 return -ENOMEM;
1650
1651         __ipa_cmd(iob)->data.vnicc.data.query_cmds.vnic_char = vnic_char;
1652
1653         /* prepare callback control */
1654         cbctl.result.sup_cmds = sup_cmds;
1655
1656         return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, &cbctl);
1657 }
1658
1659 /* VNICC enable/disable characteristic request */
1660 static int qeth_l2_vnicc_set_char(struct qeth_card *card, u32 vnic_char,
1661                                       u32 cmd)
1662 {
1663         struct qeth_cmd_buffer *iob;
1664
1665         QETH_CARD_TEXT(card, 2, "vniccedc");
1666         iob = qeth_l2_vnicc_build_cmd(card, cmd, VNICC_DATA_SIZEOF(set_char));
1667         if (!iob)
1668                 return -ENOMEM;
1669
1670         __ipa_cmd(iob)->data.vnicc.data.set_char.vnic_char = vnic_char;
1671
1672         return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, NULL);
1673 }
1674
1675 /* VNICC get/set timeout for characteristic request */
1676 static int qeth_l2_vnicc_getset_timeout(struct qeth_card *card, u32 vnicc,
1677                                         u32 cmd, u32 *timeout)
1678 {
1679         struct qeth_vnicc_getset_timeout *getset_timeout;
1680         struct _qeth_l2_vnicc_request_cbctl cbctl;
1681         struct qeth_cmd_buffer *iob;
1682
1683         QETH_CARD_TEXT(card, 2, "vniccgst");
1684         iob = qeth_l2_vnicc_build_cmd(card, cmd,
1685                                       VNICC_DATA_SIZEOF(getset_timeout));
1686         if (!iob)
1687                 return -ENOMEM;
1688
1689         getset_timeout = &__ipa_cmd(iob)->data.vnicc.data.getset_timeout;
1690         getset_timeout->vnic_char = vnicc;
1691
1692         if (cmd == IPA_VNICC_SET_TIMEOUT)
1693                 getset_timeout->timeout = *timeout;
1694
1695         /* prepare callback control */
1696         if (cmd == IPA_VNICC_GET_TIMEOUT)
1697                 cbctl.result.timeout = timeout;
1698
1699         return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, &cbctl);
1700 }
1701
1702 /* set current VNICC flag state; called from sysfs store function */
1703 int qeth_l2_vnicc_set_state(struct qeth_card *card, u32 vnicc, bool state)
1704 {
1705         int rc = 0;
1706         u32 cmd;
1707
1708         QETH_CARD_TEXT(card, 2, "vniccsch");
1709
1710         /* do not change anything if BridgePort is enabled */
1711         if (qeth_bridgeport_is_in_use(card))
1712                 return -EBUSY;
1713
1714         /* check if characteristic and enable/disable are supported */
1715         if (!(card->options.vnicc.sup_chars & vnicc) ||
1716             !(card->options.vnicc.set_char_sup & vnicc))
1717                 return -EOPNOTSUPP;
1718
1719         /* set enable/disable command and store wanted characteristic */
1720         if (state) {
1721                 cmd = IPA_VNICC_ENABLE;
1722                 card->options.vnicc.wanted_chars |= vnicc;
1723         } else {
1724                 cmd = IPA_VNICC_DISABLE;
1725                 card->options.vnicc.wanted_chars &= ~vnicc;
1726         }
1727
1728         /* do we need to do anything? */
1729         if (card->options.vnicc.cur_chars == card->options.vnicc.wanted_chars)
1730                 return rc;
1731
1732         /* if card is not ready, simply stop here */
1733         if (!qeth_card_hw_is_reachable(card)) {
1734                 if (state)
1735                         card->options.vnicc.cur_chars |= vnicc;
1736                 else
1737                         card->options.vnicc.cur_chars &= ~vnicc;
1738                 return rc;
1739         }
1740
1741         rc = qeth_l2_vnicc_set_char(card, vnicc, cmd);
1742         if (rc)
1743                 card->options.vnicc.wanted_chars =
1744                         card->options.vnicc.cur_chars;
1745         else {
1746                 /* successful online VNICC change; handle special cases */
1747                 if (state && vnicc == QETH_VNICC_RX_BCAST)
1748                         card->options.vnicc.rx_bcast_enabled = true;
1749                 if (!state && vnicc == QETH_VNICC_LEARNING)
1750                         qeth_l2_vnicc_recover_timeout(card, vnicc,
1751                                         &card->options.vnicc.learning_timeout);
1752         }
1753
1754         return rc;
1755 }
1756
1757 /* get current VNICC flag state; called from sysfs show function */
1758 int qeth_l2_vnicc_get_state(struct qeth_card *card, u32 vnicc, bool *state)
1759 {
1760         int rc = 0;
1761
1762         QETH_CARD_TEXT(card, 2, "vniccgch");
1763
1764         /* do not get anything if BridgePort is enabled */
1765         if (qeth_bridgeport_is_in_use(card))
1766                 return -EBUSY;
1767
1768         /* check if characteristic is supported */
1769         if (!(card->options.vnicc.sup_chars & vnicc))
1770                 return -EOPNOTSUPP;
1771
1772         /* if card is ready, query current VNICC state */
1773         if (qeth_card_hw_is_reachable(card))
1774                 rc = qeth_l2_vnicc_query_chars(card);
1775
1776         *state = (card->options.vnicc.cur_chars & vnicc) ? true : false;
1777         return rc;
1778 }
1779
1780 /* set VNICC timeout; called from sysfs store function. Currently, only learning
1781  * supports timeout
1782  */
1783 int qeth_l2_vnicc_set_timeout(struct qeth_card *card, u32 timeout)
1784 {
1785         int rc = 0;
1786
1787         QETH_CARD_TEXT(card, 2, "vniccsto");
1788
1789         /* do not change anything if BridgePort is enabled */
1790         if (qeth_bridgeport_is_in_use(card))
1791                 return -EBUSY;
1792
1793         /* check if characteristic and set_timeout are supported */
1794         if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
1795             !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
1796                 return -EOPNOTSUPP;
1797
1798         /* do we need to do anything? */
1799         if (card->options.vnicc.learning_timeout == timeout)
1800                 return rc;
1801
1802         /* if card is not ready, simply store the value internally and return */
1803         if (!qeth_card_hw_is_reachable(card)) {
1804                 card->options.vnicc.learning_timeout = timeout;
1805                 return rc;
1806         }
1807
1808         /* send timeout value to card; if successful, store value internally */
1809         rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
1810                                           IPA_VNICC_SET_TIMEOUT, &timeout);
1811         if (!rc)
1812                 card->options.vnicc.learning_timeout = timeout;
1813
1814         return rc;
1815 }
1816
1817 /* get current VNICC timeout; called from sysfs show function. Currently, only
1818  * learning supports timeout
1819  */
1820 int qeth_l2_vnicc_get_timeout(struct qeth_card *card, u32 *timeout)
1821 {
1822         int rc = 0;
1823
1824         QETH_CARD_TEXT(card, 2, "vniccgto");
1825
1826         /* do not get anything if BridgePort is enabled */
1827         if (qeth_bridgeport_is_in_use(card))
1828                 return -EBUSY;
1829
1830         /* check if characteristic and get_timeout are supported */
1831         if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
1832             !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
1833                 return -EOPNOTSUPP;
1834         /* if card is ready, get timeout. Otherwise, just return stored value */
1835         *timeout = card->options.vnicc.learning_timeout;
1836         if (qeth_card_hw_is_reachable(card))
1837                 rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
1838                                                   IPA_VNICC_GET_TIMEOUT,
1839                                                   timeout);
1840
1841         return rc;
1842 }
1843
1844 /* check if VNICC is currently enabled */
1845 bool qeth_l2_vnicc_is_in_use(struct qeth_card *card)
1846 {
1847         if (!card->options.vnicc.sup_chars)
1848                 return false;
1849         /* default values are only OK if rx_bcast was not enabled by user
1850          * or the card is offline.
1851          */
1852         if (card->options.vnicc.cur_chars == QETH_VNICC_DEFAULT) {
1853                 if (!card->options.vnicc.rx_bcast_enabled ||
1854                     !qeth_card_hw_is_reachable(card))
1855                         return false;
1856         }
1857         return true;
1858 }
1859
1860 /* recover user timeout setting */
1861 static bool qeth_l2_vnicc_recover_timeout(struct qeth_card *card, u32 vnicc,
1862                                           u32 *timeout)
1863 {
1864         if (card->options.vnicc.sup_chars & vnicc &&
1865             card->options.vnicc.getset_timeout_sup & vnicc &&
1866             !qeth_l2_vnicc_getset_timeout(card, vnicc, IPA_VNICC_SET_TIMEOUT,
1867                                           timeout))
1868                 return false;
1869         *timeout = QETH_VNICC_DEFAULT_TIMEOUT;
1870         return true;
1871 }
1872
1873 /* recover user characteristic setting */
1874 static bool qeth_l2_vnicc_recover_char(struct qeth_card *card, u32 vnicc,
1875                                        bool enable)
1876 {
1877         u32 cmd = enable ? IPA_VNICC_ENABLE : IPA_VNICC_DISABLE;
1878
1879         if (card->options.vnicc.sup_chars & vnicc &&
1880             card->options.vnicc.set_char_sup & vnicc &&
1881             !qeth_l2_vnicc_set_char(card, vnicc, cmd))
1882                 return false;
1883         card->options.vnicc.wanted_chars &= ~vnicc;
1884         card->options.vnicc.wanted_chars |= QETH_VNICC_DEFAULT & vnicc;
1885         return true;
1886 }
1887
1888 /* (re-)initialize VNICC */
1889 static void qeth_l2_vnicc_init(struct qeth_card *card)
1890 {
1891         u32 *timeout = &card->options.vnicc.learning_timeout;
1892         bool enable, error = false;
1893         unsigned int chars_len, i;
1894         unsigned long chars_tmp;
1895         u32 sup_cmds, vnicc;
1896
1897         QETH_CARD_TEXT(card, 2, "vniccini");
1898         /* reset rx_bcast */
1899         card->options.vnicc.rx_bcast_enabled = 0;
1900         /* initial query and storage of VNIC characteristics */
1901         if (qeth_l2_vnicc_query_chars(card)) {
1902                 if (card->options.vnicc.wanted_chars != QETH_VNICC_DEFAULT ||
1903                     *timeout != QETH_VNICC_DEFAULT_TIMEOUT)
1904                         dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
1905                 /* fail quietly if user didn't change the default config */
1906                 card->options.vnicc.sup_chars = 0;
1907                 card->options.vnicc.cur_chars = 0;
1908                 card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
1909                 return;
1910         }
1911         /* get supported commands for each supported characteristic */
1912         chars_tmp = card->options.vnicc.sup_chars;
1913         chars_len = sizeof(card->options.vnicc.sup_chars) * BITS_PER_BYTE;
1914         for_each_set_bit(i, &chars_tmp, chars_len) {
1915                 vnicc = BIT(i);
1916                 if (qeth_l2_vnicc_query_cmds(card, vnicc, &sup_cmds)) {
1917                         sup_cmds = 0;
1918                         error = true;
1919                 }
1920                 if ((sup_cmds & IPA_VNICC_SET_TIMEOUT) &&
1921                     (sup_cmds & IPA_VNICC_GET_TIMEOUT))
1922                         card->options.vnicc.getset_timeout_sup |= vnicc;
1923                 else
1924                         card->options.vnicc.getset_timeout_sup &= ~vnicc;
1925                 if ((sup_cmds & IPA_VNICC_ENABLE) &&
1926                     (sup_cmds & IPA_VNICC_DISABLE))
1927                         card->options.vnicc.set_char_sup |= vnicc;
1928                 else
1929                         card->options.vnicc.set_char_sup &= ~vnicc;
1930         }
1931         /* enforce assumed default values and recover settings, if changed  */
1932         error |= qeth_l2_vnicc_recover_timeout(card, QETH_VNICC_LEARNING,
1933                                                timeout);
1934         /* Change chars, if necessary  */
1935         chars_tmp = card->options.vnicc.wanted_chars ^
1936                     card->options.vnicc.cur_chars;
1937         chars_len = sizeof(card->options.vnicc.wanted_chars) * BITS_PER_BYTE;
1938         for_each_set_bit(i, &chars_tmp, chars_len) {
1939                 vnicc = BIT(i);
1940                 enable = card->options.vnicc.wanted_chars & vnicc;
1941                 error |= qeth_l2_vnicc_recover_char(card, vnicc, enable);
1942         }
1943         if (error)
1944                 dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
1945 }
1946
1947 /* configure default values of VNIC characteristics */
1948 static void qeth_l2_vnicc_set_defaults(struct qeth_card *card)
1949 {
1950         /* characteristics values */
1951         card->options.vnicc.sup_chars = QETH_VNICC_ALL;
1952         card->options.vnicc.cur_chars = QETH_VNICC_DEFAULT;
1953         card->options.vnicc.learning_timeout = QETH_VNICC_DEFAULT_TIMEOUT;
1954         /* supported commands */
1955         card->options.vnicc.set_char_sup = QETH_VNICC_ALL;
1956         card->options.vnicc.getset_timeout_sup = QETH_VNICC_LEARNING;
1957         /* settings wanted by users */
1958         card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
1959 }
1960
1961 module_init(qeth_l2_init);
1962 module_exit(qeth_l2_exit);
1963 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1964 MODULE_DESCRIPTION("qeth layer 2 discipline");
1965 MODULE_LICENSE("GPL");