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 = -EADDRINUSE;
  56                 break;
  57         case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
  58         case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
  59                 rc = -EADDRNOTAVAIL;
  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 -EADDRINUSE:
 109                         dev_warn(&card->gdev->dev,
 110                                 "MAC address %pM already exists\n", mac);
 111                         break;
 112                 case -EADDRNOTAVAIL:
 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 == -EADDRINUSE)
 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                 cancel_delayed_work_sync(&card->buffer_reclaim_work);
 288                 card->state = CARD_STATE_DOWN;
 289         }
 290
 291         qeth_qdio_clear_card(card, 0);
 292         qeth_clear_working_pool_list(card);
 293         flush_workqueue(card->event_wq);
 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.dev_addr_is_registered = 1;
 340         else
 341                 card->info.dev_addr_is_registered = 0;
 342 }
 343
 344 static int qeth_l2_validate_addr(struct net_device *dev)
 345 {
 346         struct qeth_card *card = dev->ml_priv;
 347
 348         if (card->info.dev_addr_is_registered)
 349                 return eth_validate_addr(dev);
 350
 351         QETH_CARD_TEXT(card, 4, "nomacadr");
 352         return -EPERM;
 353 }
 354
 355 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 356 {
 357         struct sockaddr *addr = p;
 358         struct qeth_card *card = dev->ml_priv;
 359         u8 old_addr[ETH_ALEN];
 360         int rc = 0;
 361
 362         QETH_CARD_TEXT(card, 3, "setmac");
 363
 364         if (IS_OSM(card) || IS_OSX(card)) {
 365                 QETH_CARD_TEXT(card, 3, "setmcTYP");
 366                 return -EOPNOTSUPP;
 367         }
 368         QETH_CARD_HEX(card, 3, addr->sa_data, ETH_ALEN);
 369         if (!is_valid_ether_addr(addr->sa_data))
 370                 return -EADDRNOTAVAIL;
 371
 372         /* don't register the same address twice */
 373         if (ether_addr_equal_64bits(dev->dev_addr, addr->sa_data) &&
 374             card->info.dev_addr_is_registered)
 375                 return 0;
 376
 377         /* add the new address, switch over, drop the old */
 378         rc = qeth_l2_send_setmac(card, addr->sa_data);
 379         if (rc)
 380                 return rc;
 381         ether_addr_copy(old_addr, dev->dev_addr);
 382         ether_addr_copy(dev->dev_addr, addr->sa_data);
 383
 384         if (card->info.dev_addr_is_registered)
 385                 qeth_l2_remove_mac(card, old_addr);
 386         card->info.dev_addr_is_registered = 1;
 387         return 0;
 388 }
 389
 390 static void qeth_l2_promisc_to_bridge(struct qeth_card *card, bool enable)
 391 {
 392         int role;
 393         int rc;
 394
 395         QETH_CARD_TEXT(card, 3, "pmisc2br");
 396
 397         if (enable) {
 398                 if (card->options.sbp.reflect_promisc_primary)
 399                         role = QETH_SBP_ROLE_PRIMARY;
 400                 else
 401                         role = QETH_SBP_ROLE_SECONDARY;
 402         } else
 403                 role = QETH_SBP_ROLE_NONE;
 404
 405         rc = qeth_bridgeport_setrole(card, role);
 406         QETH_CARD_TEXT_(card, 2, "bpm%c%04x", enable ? '+' : '-', rc);
 407         if (!rc) {
 408                 card->options.sbp.role = role;
 409                 card->info.promisc_mode = enable;
 410         }
 411 }
 412
 413 static void qeth_l2_set_promisc_mode(struct qeth_card *card)
 414 {
 415         bool enable = card->dev->flags & IFF_PROMISC;
 416
 417         if (card->info.promisc_mode == enable)
 418                 return;
 419
 420         if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE)) {
 421                 qeth_setadp_promisc_mode(card, enable);
 422         } else {
 423                 mutex_lock(&card->sbp_lock);
 424                 if (card->options.sbp.reflect_promisc)
 425                         qeth_l2_promisc_to_bridge(card, enable);
 426                 mutex_unlock(&card->sbp_lock);
 427         }
 428 }
 429
 430 /* New MAC address is added to the hash table and marked to be written on card
 431  * only if there is not in the hash table storage already
 432  *
 433 */
 434 static void qeth_l2_add_mac(struct qeth_card *card, struct netdev_hw_addr *ha)
 435 {
 436         u32 mac_hash = get_unaligned((u32 *)(&ha->addr[2]));
 437         struct qeth_mac *mac;
 438
 439         hash_for_each_possible(card->mac_htable, mac, hnode, mac_hash) {
 440                 if (ether_addr_equal_64bits(ha->addr, mac->mac_addr)) {
 441                         mac->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
 442                         return;
 443                 }
 444         }
 445
 446         mac = kzalloc(sizeof(struct qeth_mac), GFP_ATOMIC);
 447         if (!mac)
 448                 return;
 449
 450         ether_addr_copy(mac->mac_addr, ha->addr);
 451         mac->disp_flag = QETH_DISP_ADDR_ADD;
 452
 453         hash_add(card->mac_htable, &mac->hnode, mac_hash);
 454 }
 455
 456 static void qeth_l2_rx_mode_work(struct work_struct *work)
 457 {
 458         struct qeth_card *card = container_of(work, struct qeth_card,
 459                                               rx_mode_work);
 460         struct net_device *dev = card->dev;
 461         struct netdev_hw_addr *ha;
 462         struct qeth_mac *mac;
 463         struct hlist_node *tmp;
 464         int i;
 465         int rc;
 466
 467         QETH_CARD_TEXT(card, 3, "setmulti");
 468
 469         netif_addr_lock_bh(dev);
 470         netdev_for_each_mc_addr(ha, dev)
 471                 qeth_l2_add_mac(card, ha);
 472         netdev_for_each_uc_addr(ha, dev)
 473                 qeth_l2_add_mac(card, ha);
 474         netif_addr_unlock_bh(dev);
 475
 476         hash_for_each_safe(card->mac_htable, i, tmp, mac, hnode) {
 477                 switch (mac->disp_flag) {
 478                 case QETH_DISP_ADDR_DELETE:
 479                         qeth_l2_remove_mac(card, mac->mac_addr);
 480                         hash_del(&mac->hnode);
 481                         kfree(mac);
 482                         break;
 483                 case QETH_DISP_ADDR_ADD:
 484                         rc = qeth_l2_write_mac(card, mac->mac_addr);
 485                         if (rc) {
 486                                 hash_del(&mac->hnode);
 487                                 kfree(mac);
 488                                 break;
 489                         }
 490                         /* fall through */
 491                 default:
 492                         /* for next call to set_rx_mode(): */
 493                         mac->disp_flag = QETH_DISP_ADDR_DELETE;
 494                 }
 495         }
 496
 497         qeth_l2_set_promisc_mode(card);
 498 }
 499
 500 static int qeth_l2_xmit_osn(struct qeth_card *card, struct sk_buff *skb,
 501                             struct qeth_qdio_out_q *queue)
 502 {
 503         gfp_t gfp = GFP_ATOMIC | (skb_pfmemalloc(skb) ? __GFP_MEMALLOC : 0);
 504         struct qeth_hdr *hdr = (struct qeth_hdr *)skb->data;
 505         addr_t end = (addr_t)(skb->data + sizeof(*hdr));
 506         addr_t start = (addr_t)skb->data;
 507         unsigned int elements = 0;
 508         unsigned int hd_len = 0;
 509         int rc;
 510
 511         if (skb->protocol == htons(ETH_P_IPV6))
 512                 return -EPROTONOSUPPORT;
 513
 514         if (qeth_get_elements_for_range(start, end) > 1) {
 515                 /* Misaligned HW header, move it to its own buffer element. */
 516                 hdr = kmem_cache_alloc(qeth_core_header_cache, gfp);
 517                 if (!hdr)
 518                         return -ENOMEM;
 519                 hd_len = sizeof(*hdr);
 520                 skb_copy_from_linear_data(skb, (char *)hdr, hd_len);
 521                 elements++;
 522         }
 523
 524         elements += qeth_count_elements(skb, hd_len);
 525         if (elements > queue->max_elements) {
 526                 rc = -E2BIG;
 527                 goto out;
 528         }
 529
 530         rc = qeth_do_send_packet(card, queue, skb, hdr, hd_len, hd_len,
 531                                  elements);
 532 out:
 533         if (rc && hd_len)
 534                 kmem_cache_free(qeth_core_header_cache, hdr);
 535         return rc;
 536 }
 537
 538 static netdev_tx_t qeth_l2_hard_start_xmit(struct sk_buff *skb,
 539                                            struct net_device *dev)
 540 {
 541         struct qeth_card *card = dev->ml_priv;
 542         u16 txq = skb_get_queue_mapping(skb);
 543         struct qeth_qdio_out_q *queue;
 544         int rc;
 545
 546         if (!skb_is_gso(skb))
 547                 qdisc_skb_cb(skb)->pkt_len = skb->len;
 548         if (IS_IQD(card))
 549                 txq = qeth_iqd_translate_txq(dev, txq);
 550         queue = card->qdio.out_qs[txq];
 551
 552         if (IS_OSN(card))
 553                 rc = qeth_l2_xmit_osn(card, skb, queue);
 554         else
 555                 rc = qeth_xmit(card, skb, queue, qeth_get_ip_version(skb),
 556                                qeth_l2_fill_header);
 557
 558         if (!rc)
 559                 return NETDEV_TX_OK;
 560
 561         QETH_TXQ_STAT_INC(queue, tx_dropped);
 562         kfree_skb(skb);
 563         return NETDEV_TX_OK;
 564 }
 565
 566 static u16 qeth_l2_select_queue(struct net_device *dev, struct sk_buff *skb,
 567                                 struct net_device *sb_dev)
 568 {
 569         struct qeth_card *card = dev->ml_priv;
 570
 571         if (IS_IQD(card))
 572                 return qeth_iqd_select_queue(dev, skb,
 573                                              qeth_get_ether_cast_type(skb),
 574                                              sb_dev);
 575
 576         return IS_VM_NIC(card) ? netdev_pick_tx(dev, skb, sb_dev) :
 577                                  qeth_get_priority_queue(card, skb);
 578 }
 579
 580 static const struct device_type qeth_l2_devtype = {
 581         .name = "qeth_layer2",
 582         .groups = qeth_l2_attr_groups,
 583 };
 584
 585 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 586 {
 587         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 588         int rc;
 589
 590         if (IS_OSN(card))
 591                 dev_notice(&gdev->dev, "OSN support will be dropped in 2021\n");
 592
 593         qeth_l2_vnicc_set_defaults(card);
 594         mutex_init(&card->sbp_lock);
 595
 596         if (gdev->dev.type == &qeth_generic_devtype) {
 597                 rc = qeth_l2_create_device_attributes(&gdev->dev);
 598                 if (rc)
 599                         return rc;
 600         }
 601
 602         hash_init(card->mac_htable);
 603         INIT_WORK(&card->rx_mode_work, qeth_l2_rx_mode_work);
 604         return 0;
 605 }
 606
 607 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
 608 {
 609         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
 610
 611         if (cgdev->dev.type == &qeth_generic_devtype)
 612                 qeth_l2_remove_device_attributes(&cgdev->dev);
 613         qeth_set_allowed_threads(card, 0, 1);
 614         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 615
 616         if (cgdev->state == CCWGROUP_ONLINE)
 617                 qeth_set_offline(card, false);
 618
 619         cancel_work_sync(&card->close_dev_work);
 620         if (card->dev->reg_state == NETREG_REGISTERED)
 621                 unregister_netdev(card->dev);
 622 }
 623
 624 static void qeth_l2_set_rx_mode(struct net_device *dev)
 625 {
 626         struct qeth_card *card = dev->ml_priv;
 627
 628         schedule_work(&card->rx_mode_work);
 629 }
 630
 631 static const struct net_device_ops qeth_l2_netdev_ops = {
 632         .ndo_open               = qeth_open,
 633         .ndo_stop               = qeth_stop,
 634         .ndo_get_stats64        = qeth_get_stats64,
 635         .ndo_start_xmit         = qeth_l2_hard_start_xmit,
 636         .ndo_features_check     = qeth_features_check,
 637         .ndo_select_queue       = qeth_l2_select_queue,
 638         .ndo_validate_addr      = qeth_l2_validate_addr,
 639         .ndo_set_rx_mode        = qeth_l2_set_rx_mode,
 640         .ndo_do_ioctl           = qeth_do_ioctl,
 641         .ndo_set_mac_address    = qeth_l2_set_mac_address,
 642         .ndo_vlan_rx_add_vid    = qeth_l2_vlan_rx_add_vid,
 643         .ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,
 644         .ndo_tx_timeout         = qeth_tx_timeout,
 645         .ndo_fix_features       = qeth_fix_features,
 646         .ndo_set_features       = qeth_set_features
 647 };
 648
 649 static const struct net_device_ops qeth_osn_netdev_ops = {
 650         .ndo_open               = qeth_open,
 651         .ndo_stop               = qeth_stop,
 652         .ndo_get_stats64        = qeth_get_stats64,
 653         .ndo_start_xmit         = qeth_l2_hard_start_xmit,
 654         .ndo_validate_addr      = eth_validate_addr,
 655         .ndo_tx_timeout         = qeth_tx_timeout,
 656 };
 657
 658 static int qeth_l2_setup_netdev(struct qeth_card *card)
 659 {
 660         int rc;
 661
 662         if (IS_OSN(card)) {
 663                 card->dev->netdev_ops = &qeth_osn_netdev_ops;
 664                 card->dev->flags |= IFF_NOARP;
 665                 goto add_napi;
 666         }
 667
 668         rc = qeth_setup_netdev(card);
 669         if (rc)
 670                 return rc;
 671
 672         card->dev->needed_headroom = sizeof(struct qeth_hdr);
 673         card->dev->netdev_ops = &qeth_l2_netdev_ops;
 674         card->dev->priv_flags |= IFF_UNICAST_FLT;
 675
 676         if (IS_OSM(card)) {
 677                 card->dev->features |= NETIF_F_VLAN_CHALLENGED;
 678         } else {
 679                 if (!IS_VM_NIC(card))
 680                         card->dev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
 681                 card->dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
 682         }
 683
 684         if (IS_OSD(card) && !IS_VM_NIC(card)) {
 685                 card->dev->features |= NETIF_F_SG;
 686                 /* OSA 3S and earlier has no RX/TX support */
 687                 if (qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM)) {
 688                         card->dev->hw_features |= NETIF_F_IP_CSUM;
 689                         card->dev->vlan_features |= NETIF_F_IP_CSUM;
 690                 }
 691         }
 692         if (qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) {
 693                 card->dev->hw_features |= NETIF_F_IPV6_CSUM;
 694                 card->dev->vlan_features |= NETIF_F_IPV6_CSUM;
 695         }
 696         if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM) ||
 697             qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6)) {
 698                 card->dev->hw_features |= NETIF_F_RXCSUM;
 699                 card->dev->vlan_features |= NETIF_F_RXCSUM;
 700         }
 701         if (qeth_is_supported(card, IPA_OUTBOUND_TSO)) {
 702                 card->dev->hw_features |= NETIF_F_TSO;
 703                 card->dev->vlan_features |= NETIF_F_TSO;
 704         }
 705         if (qeth_is_supported6(card, IPA_OUTBOUND_TSO)) {
 706                 card->dev->hw_features |= NETIF_F_TSO6;
 707                 card->dev->vlan_features |= NETIF_F_TSO6;
 708         }
 709
 710         if (card->dev->hw_features & (NETIF_F_TSO | NETIF_F_TSO6)) {
 711                 card->dev->needed_headroom = sizeof(struct qeth_hdr_tso);
 712                 netif_set_gso_max_size(card->dev,
 713                                        PAGE_SIZE * (QDIO_MAX_ELEMENTS_PER_BUFFER - 1));
 714         }
 715
 716 add_napi:
 717         netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT);
 718         return register_netdev(card->dev);
 719 }
 720
 721 static void qeth_l2_trace_features(struct qeth_card *card)
 722 {
 723         /* Set BridgePort features */
 724         QETH_CARD_TEXT(card, 2, "featuSBP");
 725         QETH_CARD_HEX(card, 2, &card->options.sbp.supported_funcs,
 726                       sizeof(card->options.sbp.supported_funcs));
 727         /* VNIC Characteristics features */
 728         QETH_CARD_TEXT(card, 2, "feaVNICC");
 729         QETH_CARD_HEX(card, 2, &card->options.vnicc.sup_chars,
 730                       sizeof(card->options.vnicc.sup_chars));
 731 }
 732
 733 static void qeth_l2_setup_bridgeport_attrs(struct qeth_card *card)
 734 {
 735         if (!card->options.sbp.reflect_promisc &&
 736             card->options.sbp.role != QETH_SBP_ROLE_NONE) {
 737                 /* Conditional to avoid spurious error messages */
 738                 qeth_bridgeport_setrole(card, card->options.sbp.role);
 739                 /* Let the callback function refresh the stored role value. */
 740                 qeth_bridgeport_query_ports(card, &card->options.sbp.role,
 741                                             NULL);
 742         }
 743         if (card->options.sbp.hostnotification) {
 744                 if (qeth_bridgeport_an_set(card, 1))
 745                         card->options.sbp.hostnotification = 0;
 746         } else {
 747                 qeth_bridgeport_an_set(card, 0);
 748         }
 749 }
 750
 751 static int qeth_l2_set_online(struct qeth_card *card)
 752 {
 753         struct ccwgroup_device *gdev = card->gdev;
 754         struct net_device *dev = card->dev;
 755         int rc = 0;
 756         bool carrier_ok;
 757
 758         rc = qeth_core_hardsetup_card(card, &carrier_ok);
 759         if (rc) {
 760                 QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
 761                 rc = -ENODEV;
 762                 goto out_remove;
 763         }
 764
 765         mutex_lock(&card->sbp_lock);
 766         qeth_bridgeport_query_support(card);
 767         if (card->options.sbp.supported_funcs) {
 768                 qeth_l2_setup_bridgeport_attrs(card);
 769                 dev_info(&card->gdev->dev,
 770                          "The device represents a Bridge Capable Port\n");
 771         }
 772         mutex_unlock(&card->sbp_lock);
 773
 774         qeth_l2_register_dev_addr(card);
 775
 776         /* for the rx_bcast characteristic, init VNICC after setmac */
 777         qeth_l2_vnicc_init(card);
 778
 779         qeth_trace_features(card);
 780         qeth_l2_trace_features(card);
 781
 782         qeth_print_status_message(card);
 783
 784         /* softsetup */
 785         QETH_CARD_TEXT(card, 2, "softsetp");
 786
 787         card->state = CARD_STATE_SOFTSETUP;
 788
 789         qeth_set_allowed_threads(card, 0xffffffff, 0);
 790
 791         if (dev->reg_state != NETREG_REGISTERED) {
 792                 rc = qeth_l2_setup_netdev(card);
 793                 if (rc)
 794                         goto out_remove;
 795
 796                 if (carrier_ok)
 797                         netif_carrier_on(dev);
 798         } else {
 799                 rtnl_lock();
 800                 if (carrier_ok)
 801                         netif_carrier_on(dev);
 802                 else
 803                         netif_carrier_off(dev);
 804
 805                 netif_device_attach(dev);
 806                 qeth_enable_hw_features(dev);
 807
 808                 if (card->info.open_when_online) {
 809                         card->info.open_when_online = 0;
 810                         dev_open(dev, NULL);
 811                 }
 812                 rtnl_unlock();
 813         }
 814         /* let user_space know that device is online */
 815         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
 816         return 0;
 817
 818 out_remove:
 819         qeth_l2_stop_card(card);
 820         qeth_stop_channel(&card->data);
 821         qeth_stop_channel(&card->write);
 822         qeth_stop_channel(&card->read);
 823         qdio_free(CARD_DDEV(card));
 824         return rc;
 825 }
 826
 827 static void qeth_l2_set_offline(struct qeth_card *card)
 828 {
 829         qeth_l2_stop_card(card);
 830 }
 831
 832 static int __init qeth_l2_init(void)
 833 {
 834         pr_info("register layer 2 discipline\n");
 835         return 0;
 836 }
 837
 838 static void __exit qeth_l2_exit(void)
 839 {
 840         pr_info("unregister layer 2 discipline\n");
 841 }
 842
 843 /* Returns zero if the command is successfully "consumed" */
 844 static int qeth_l2_control_event(struct qeth_card *card,
 845                                         struct qeth_ipa_cmd *cmd)
 846 {
 847         switch (cmd->hdr.command) {
 848         case IPA_CMD_SETBRIDGEPORT_OSA:
 849         case IPA_CMD_SETBRIDGEPORT_IQD:
 850                 if (cmd->data.sbp.hdr.command_code ==
 851                                 IPA_SBP_BRIDGE_PORT_STATE_CHANGE) {
 852                         qeth_bridge_state_change(card, cmd);
 853                         return 0;
 854                 } else
 855                         return 1;
 856         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
 857                 qeth_bridge_host_event(card, cmd);
 858                 return 0;
 859         default:
 860                 return 1;
 861         }
 862 }
 863
 864 struct qeth_discipline qeth_l2_discipline = {
 865         .devtype = &qeth_l2_devtype,
 866         .setup = qeth_l2_probe_device,
 867         .remove = qeth_l2_remove_device,
 868         .set_online = qeth_l2_set_online,
 869         .set_offline = qeth_l2_set_offline,
 870         .do_ioctl = NULL,
 871         .control_event_handler = qeth_l2_control_event,
 872 };
 873 EXPORT_SYMBOL_GPL(qeth_l2_discipline);
 874
 875 #ifdef CONFIG_QETH_OSN
 876 static void qeth_osn_assist_cb(struct qeth_card *card,
 877                                struct qeth_cmd_buffer *iob,
 878                                unsigned int data_length)
 879 {
 880         qeth_notify_cmd(iob, 0);
 881         qeth_put_cmd(iob);
 882 }
 883
 884 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
 885 {
 886         struct qeth_cmd_buffer *iob;
 887         struct qeth_card *card;
 888
 889         if (data_len < 0)
 890                 return -EINVAL;
 891         if (!dev)
 892                 return -ENODEV;
 893         card = dev->ml_priv;
 894         if (!card)
 895                 return -ENODEV;
 896         QETH_CARD_TEXT(card, 2, "osnsdmc");
 897         if (!qeth_card_hw_is_reachable(card))
 898                 return -ENODEV;
 899
 900         iob = qeth_alloc_cmd(&card->write, IPA_PDU_HEADER_SIZE + data_len, 1,
 901                              QETH_IPA_TIMEOUT);
 902         if (!iob)
 903                 return -ENOMEM;
 904
 905         qeth_prepare_ipa_cmd(card, iob, (u16) data_len, NULL);
 906
 907         memcpy(__ipa_cmd(iob), data, data_len);
 908         iob->callback = qeth_osn_assist_cb;
 909         return qeth_send_ipa_cmd(card, iob, NULL, NULL);
 910 }
 911 EXPORT_SYMBOL(qeth_osn_assist);
 912
 913 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
 914                   int (*assist_cb)(struct net_device *, void *),
 915                   int (*data_cb)(struct sk_buff *))
 916 {
 917         struct qeth_card *card;
 918         char bus_id[16];
 919         u16 devno;
 920
 921         memcpy(&devno, read_dev_no, 2);
 922         sprintf(bus_id, "0.0.%04x", devno);
 923         card = qeth_get_card_by_busid(bus_id);
 924         if (!card || !IS_OSN(card))
 925                 return -ENODEV;
 926         *dev = card->dev;
 927
 928         QETH_CARD_TEXT(card, 2, "osnreg");
 929         if ((assist_cb == NULL) || (data_cb == NULL))
 930                 return -EINVAL;
 931         card->osn_info.assist_cb = assist_cb;
 932         card->osn_info.data_cb = data_cb;
 933         return 0;
 934 }
 935 EXPORT_SYMBOL(qeth_osn_register);
 936
 937 void qeth_osn_deregister(struct net_device *dev)
 938 {
 939         struct qeth_card *card;
 940
 941         if (!dev)
 942                 return;
 943         card = dev->ml_priv;
 944         if (!card)
 945                 return;
 946         QETH_CARD_TEXT(card, 2, "osndereg");
 947         card->osn_info.assist_cb = NULL;
 948         card->osn_info.data_cb = NULL;
 949         return;
 950 }
 951 EXPORT_SYMBOL(qeth_osn_deregister);
 952 #endif
 953
 954 /* SETBRIDGEPORT support, async notifications */
 955
 956 enum qeth_an_event_type {anev_reg_unreg, anev_abort, anev_reset};
 957
 958 /**
 959  * qeth_bridge_emit_host_event() - bridgeport address change notification
 960  * @card:  qeth_card structure pointer, for udev events.
 961  * @evtype:  "normal" register/unregister, or abort, or reset. For abort
 962  *            and reset token and addr_lnid are unused and may be NULL.
 963  * @code:  event bitmask: high order bit 0x80 value 1 means removal of an
 964  *                        object, 0 - addition of an object.
 965  *                        0x01 - VLAN, 0x02 - MAC, 0x03 - VLAN and MAC.
 966  * @token: "network token" structure identifying physical address of the port.
 967  * @addr_lnid: pointer to structure with MAC address and VLAN ID.
 968  *
 969  * This function is called when registrations and deregistrations are
 970  * reported by the hardware, and also when notifications are enabled -
 971  * for all currently registered addresses.
 972  */
 973 static void qeth_bridge_emit_host_event(struct qeth_card *card,
 974         enum qeth_an_event_type evtype,
 975         u8 code, struct net_if_token *token, struct mac_addr_lnid *addr_lnid)
 976 {
 977         char str[7][32];
 978         char *env[8];
 979         int i = 0;
 980
 981         switch (evtype) {
 982         case anev_reg_unreg:
 983                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=%s",
 984                                 (code & IPA_ADDR_CHANGE_CODE_REMOVAL)
 985                                 ? "deregister" : "register");
 986                 env[i] = str[i]; i++;
 987                 if (code & IPA_ADDR_CHANGE_CODE_VLANID) {
 988                         snprintf(str[i], sizeof(str[i]), "VLAN=%d",
 989                                 addr_lnid->lnid);
 990                         env[i] = str[i]; i++;
 991                 }
 992                 if (code & IPA_ADDR_CHANGE_CODE_MACADDR) {
 993                         snprintf(str[i], sizeof(str[i]), "MAC=%pM",
 994                                 addr_lnid->mac);
 995                         env[i] = str[i]; i++;
 996                 }
 997                 snprintf(str[i], sizeof(str[i]), "NTOK_BUSID=%x.%x.%04x",
 998                         token->cssid, token->ssid, token->devnum);
 999                 env[i] = str[i]; i++;
1000                 snprintf(str[i], sizeof(str[i]), "NTOK_IID=%02x", token->iid);
1001                 env[i] = str[i]; i++;
1002                 snprintf(str[i], sizeof(str[i]), "NTOK_CHPID=%02x",
1003                                 token->chpid);
1004                 env[i] = str[i]; i++;
1005                 snprintf(str[i], sizeof(str[i]), "NTOK_CHID=%04x", token->chid);
1006                 env[i] = str[i]; i++;
1007                 break;
1008         case anev_abort:
1009                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=abort");
1010                 env[i] = str[i]; i++;
1011                 break;
1012         case anev_reset:
1013                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=reset");
1014                 env[i] = str[i]; i++;
1015                 break;
1016         }
1017         env[i] = NULL;
1018         kobject_uevent_env(&card->gdev->dev.kobj, KOBJ_CHANGE, env);
1019 }
1020
1021 struct qeth_bridge_state_data {
1022         struct work_struct worker;
1023         struct qeth_card *card;
1024         struct qeth_sbp_state_change qports;
1025 };
1026
1027 static void qeth_bridge_state_change_worker(struct work_struct *work)
1028 {
1029         struct qeth_bridge_state_data *data =
1030                 container_of(work, struct qeth_bridge_state_data, worker);
1031         /* We are only interested in the first entry - local port */
1032         struct qeth_sbp_port_entry *entry = &data->qports.entry[0];
1033         char env_locrem[32];
1034         char env_role[32];
1035         char env_state[32];
1036         char *env[] = {
1037                 env_locrem,
1038                 env_role,
1039                 env_state,
1040                 NULL
1041         };
1042
1043         /* Role should not change by itself, but if it did, */
1044         /* information from the hardware is authoritative.  */
1045         mutex_lock(&data->card->sbp_lock);
1046         data->card->options.sbp.role = entry->role;
1047         mutex_unlock(&data->card->sbp_lock);
1048
1049         snprintf(env_locrem, sizeof(env_locrem), "BRIDGEPORT=statechange");
1050         snprintf(env_role, sizeof(env_role), "ROLE=%s",
1051                 (entry->role == QETH_SBP_ROLE_NONE) ? "none" :
1052                 (entry->role == QETH_SBP_ROLE_PRIMARY) ? "primary" :
1053                 (entry->role == QETH_SBP_ROLE_SECONDARY) ? "secondary" :
1054                 "<INVALID>");
1055         snprintf(env_state, sizeof(env_state), "STATE=%s",
1056                 (entry->state == QETH_SBP_STATE_INACTIVE) ? "inactive" :
1057                 (entry->state == QETH_SBP_STATE_STANDBY) ? "standby" :
1058                 (entry->state == QETH_SBP_STATE_ACTIVE) ? "active" :
1059                 "<INVALID>");
1060         kobject_uevent_env(&data->card->gdev->dev.kobj,
1061                                 KOBJ_CHANGE, env);
1062         kfree(data);
1063 }
1064
1065 static void qeth_bridge_state_change(struct qeth_card *card,
1066                                         struct qeth_ipa_cmd *cmd)
1067 {
1068         struct qeth_sbp_state_change *qports =
1069                  &cmd->data.sbp.data.state_change;
1070         struct qeth_bridge_state_data *data;
1071         int extrasize;
1072
1073         QETH_CARD_TEXT(card, 2, "brstchng");
1074         if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1075                 QETH_CARD_TEXT_(card, 2, "BPsz%04x", qports->entry_length);
1076                 return;
1077         }
1078         extrasize = sizeof(struct qeth_sbp_port_entry) * qports->num_entries;
1079         data = kzalloc(sizeof(struct qeth_bridge_state_data) + extrasize,
1080                 GFP_ATOMIC);
1081         if (!data) {
1082                 QETH_CARD_TEXT(card, 2, "BPSalloc");
1083                 return;
1084         }
1085         INIT_WORK(&data->worker, qeth_bridge_state_change_worker);
1086         data->card = card;
1087         memcpy(&data->qports, qports,
1088                         sizeof(struct qeth_sbp_state_change) + extrasize);
1089         queue_work(card->event_wq, &data->worker);
1090 }
1091
1092 struct qeth_bridge_host_data {
1093         struct work_struct worker;
1094         struct qeth_card *card;
1095         struct qeth_ipacmd_addr_change hostevs;
1096 };
1097
1098 static void qeth_bridge_host_event_worker(struct work_struct *work)
1099 {
1100         struct qeth_bridge_host_data *data =
1101                 container_of(work, struct qeth_bridge_host_data, worker);
1102         int i;
1103
1104         if (data->hostevs.lost_event_mask) {
1105                 dev_info(&data->card->gdev->dev,
1106 "Address notification from the Bridge Port stopped %s (%s)\n",
1107                         data->card->dev->name,
1108                         (data->hostevs.lost_event_mask == 0x01)
1109                         ? "Overflow"
1110                         : (data->hostevs.lost_event_mask == 0x02)
1111                         ? "Bridge port state change"
1112                         : "Unknown reason");
1113                 mutex_lock(&data->card->sbp_lock);
1114                 data->card->options.sbp.hostnotification = 0;
1115                 mutex_unlock(&data->card->sbp_lock);
1116                 qeth_bridge_emit_host_event(data->card, anev_abort,
1117                         0, NULL, NULL);
1118         } else
1119                 for (i = 0; i < data->hostevs.num_entries; i++) {
1120                         struct qeth_ipacmd_addr_change_entry *entry =
1121                                         &data->hostevs.entry[i];
1122                         qeth_bridge_emit_host_event(data->card,
1123                                         anev_reg_unreg,
1124                                         entry->change_code,
1125                                         &entry->token, &entry->addr_lnid);
1126                 }
1127         kfree(data);
1128 }
1129
1130 static void qeth_bridge_host_event(struct qeth_card *card,
1131                                         struct qeth_ipa_cmd *cmd)
1132 {
1133         struct qeth_ipacmd_addr_change *hostevs =
1134                  &cmd->data.addrchange;
1135         struct qeth_bridge_host_data *data;
1136         int extrasize;
1137
1138         QETH_CARD_TEXT(card, 2, "brhostev");
1139         if (cmd->hdr.return_code != 0x0000) {
1140                 if (cmd->hdr.return_code == 0x0010) {
1141                         if (hostevs->lost_event_mask == 0x00)
1142                                 hostevs->lost_event_mask = 0xff;
1143                 } else {
1144                         QETH_CARD_TEXT_(card, 2, "BPHe%04x",
1145                                 cmd->hdr.return_code);
1146                         return;
1147                 }
1148         }
1149         extrasize = sizeof(struct qeth_ipacmd_addr_change_entry) *
1150                                                 hostevs->num_entries;
1151         data = kzalloc(sizeof(struct qeth_bridge_host_data) + extrasize,
1152                 GFP_ATOMIC);
1153         if (!data) {
1154                 QETH_CARD_TEXT(card, 2, "BPHalloc");
1155                 return;
1156         }
1157         INIT_WORK(&data->worker, qeth_bridge_host_event_worker);
1158         data->card = card;
1159         memcpy(&data->hostevs, hostevs,
1160                         sizeof(struct qeth_ipacmd_addr_change) + extrasize);
1161         queue_work(card->event_wq, &data->worker);
1162 }
1163
1164 /* SETBRIDGEPORT support; sending commands */
1165
1166 struct _qeth_sbp_cbctl {
1167         union {
1168                 u32 supported;
1169                 struct {
1170                         enum qeth_sbp_roles *role;
1171                         enum qeth_sbp_states *state;
1172                 } qports;
1173         } data;
1174 };
1175
1176 static int qeth_bridgeport_makerc(struct qeth_card *card,
1177                                   struct qeth_ipa_cmd *cmd)
1178 {
1179         struct qeth_ipacmd_setbridgeport *sbp = &cmd->data.sbp;
1180         enum qeth_ipa_sbp_cmd setcmd = sbp->hdr.command_code;
1181         u16 ipa_rc = cmd->hdr.return_code;
1182         u16 sbp_rc = sbp->hdr.return_code;
1183         int rc;
1184
1185         if (ipa_rc == IPA_RC_SUCCESS && sbp_rc == IPA_RC_SUCCESS)
1186                 return 0;
1187
1188         if ((IS_IQD(card) && ipa_rc == IPA_RC_SUCCESS) ||
1189             (!IS_IQD(card) && ipa_rc == sbp_rc)) {
1190                 switch (sbp_rc) {
1191                 case IPA_RC_SUCCESS:
1192                         rc = 0;
1193                         break;
1194                 case IPA_RC_L2_UNSUPPORTED_CMD:
1195                 case IPA_RC_UNSUPPORTED_COMMAND:
1196                         rc = -EOPNOTSUPP;
1197                         break;
1198                 case IPA_RC_SBP_OSA_NOT_CONFIGURED:
1199                 case IPA_RC_SBP_IQD_NOT_CONFIGURED:
1200                         rc = -ENODEV; /* maybe not the best code here? */
1201                         dev_err(&card->gdev->dev,
1202         "The device is not configured as a Bridge Port\n");
1203                         break;
1204                 case IPA_RC_SBP_OSA_OS_MISMATCH:
1205                 case IPA_RC_SBP_IQD_OS_MISMATCH:
1206                         rc = -EPERM;
1207                         dev_err(&card->gdev->dev,
1208         "A Bridge Port is already configured by a different operating system\n");
1209                         break;
1210                 case IPA_RC_SBP_OSA_ANO_DEV_PRIMARY:
1211                 case IPA_RC_SBP_IQD_ANO_DEV_PRIMARY:
1212                         switch (setcmd) {
1213                         case IPA_SBP_SET_PRIMARY_BRIDGE_PORT:
1214                                 rc = -EEXIST;
1215                                 dev_err(&card->gdev->dev,
1216         "The LAN already has a primary Bridge Port\n");
1217                                 break;
1218                         case IPA_SBP_SET_SECONDARY_BRIDGE_PORT:
1219                                 rc = -EBUSY;
1220                                 dev_err(&card->gdev->dev,
1221         "The device is already a primary Bridge Port\n");
1222                                 break;
1223                         default:
1224                                 rc = -EIO;
1225                         }
1226                         break;
1227                 case IPA_RC_SBP_OSA_CURRENT_SECOND:
1228                 case IPA_RC_SBP_IQD_CURRENT_SECOND:
1229                         rc = -EBUSY;
1230                         dev_err(&card->gdev->dev,
1231         "The device is already a secondary Bridge Port\n");
1232                         break;
1233                 case IPA_RC_SBP_OSA_LIMIT_SECOND:
1234                 case IPA_RC_SBP_IQD_LIMIT_SECOND:
1235                         rc = -EEXIST;
1236                         dev_err(&card->gdev->dev,
1237         "The LAN cannot have more secondary Bridge Ports\n");
1238                         break;
1239                 case IPA_RC_SBP_OSA_CURRENT_PRIMARY:
1240                 case IPA_RC_SBP_IQD_CURRENT_PRIMARY:
1241                         rc = -EBUSY;
1242                         dev_err(&card->gdev->dev,
1243         "The device is already a primary Bridge Port\n");
1244                         break;
1245                 case IPA_RC_SBP_OSA_NOT_AUTHD_BY_ZMAN:
1246                 case IPA_RC_SBP_IQD_NOT_AUTHD_BY_ZMAN:
1247                         rc = -EACCES;
1248                         dev_err(&card->gdev->dev,
1249         "The device is not authorized to be a Bridge Port\n");
1250                         break;
1251                 default:
1252                         rc = -EIO;
1253                 }
1254         } else {
1255                 switch (ipa_rc) {
1256                 case IPA_RC_NOTSUPP:
1257                         rc = -EOPNOTSUPP;
1258                         break;
1259                 case IPA_RC_UNSUPPORTED_COMMAND:
1260                         rc = -EOPNOTSUPP;
1261                         break;
1262                 default:
1263                         rc = -EIO;
1264                 }
1265         }
1266
1267         if (rc) {
1268                 QETH_CARD_TEXT_(card, 2, "SBPi%04x", ipa_rc);
1269                 QETH_CARD_TEXT_(card, 2, "SBPc%04x", sbp_rc);
1270         }
1271         return rc;
1272 }
1273
1274 static struct qeth_cmd_buffer *qeth_sbp_build_cmd(struct qeth_card *card,
1275                                                   enum qeth_ipa_sbp_cmd sbp_cmd,
1276                                                   unsigned int data_length)
1277 {
1278         enum qeth_ipa_cmds ipa_cmd = IS_IQD(card) ? IPA_CMD_SETBRIDGEPORT_IQD :
1279                                                     IPA_CMD_SETBRIDGEPORT_OSA;
1280         struct qeth_ipacmd_sbp_hdr *hdr;
1281         struct qeth_cmd_buffer *iob;
1282
1283         iob = qeth_ipa_alloc_cmd(card, ipa_cmd, QETH_PROT_NONE,
1284                                  data_length +
1285                                  offsetof(struct qeth_ipacmd_setbridgeport,
1286                                           data));
1287         if (!iob)
1288                 return iob;
1289
1290         hdr = &__ipa_cmd(iob)->data.sbp.hdr;
1291         hdr->cmdlength = sizeof(*hdr) + data_length;
1292         hdr->command_code = sbp_cmd;
1293         hdr->used_total = 1;
1294         hdr->seq_no = 1;
1295         return iob;
1296 }
1297
1298 static int qeth_bridgeport_query_support_cb(struct qeth_card *card,
1299         struct qeth_reply *reply, unsigned long data)
1300 {
1301         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1302         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1303         int rc;
1304
1305         QETH_CARD_TEXT(card, 2, "brqsupcb");
1306         rc = qeth_bridgeport_makerc(card, cmd);
1307         if (rc)
1308                 return rc;
1309
1310         cbctl->data.supported =
1311                 cmd->data.sbp.data.query_cmds_supp.supported_cmds;
1312         return 0;
1313 }
1314
1315 /**
1316  * qeth_bridgeport_query_support() - store bitmask of supported subfunctions.
1317  * @card:                            qeth_card structure pointer.
1318  *
1319  * Sets bitmask of supported setbridgeport subfunctions in the qeth_card
1320  * strucutre: card->options.sbp.supported_funcs.
1321  */
1322 static void qeth_bridgeport_query_support(struct qeth_card *card)
1323 {
1324         struct qeth_cmd_buffer *iob;
1325         struct _qeth_sbp_cbctl cbctl;
1326
1327         QETH_CARD_TEXT(card, 2, "brqsuppo");
1328         iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_COMMANDS_SUPPORTED,
1329                                  SBP_DATA_SIZEOF(query_cmds_supp));
1330         if (!iob)
1331                 return;
1332
1333         if (qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_support_cb,
1334                               &cbctl)) {
1335                 card->options.sbp.role = QETH_SBP_ROLE_NONE;
1336                 card->options.sbp.supported_funcs = 0;
1337                 return;
1338         }
1339         card->options.sbp.supported_funcs = cbctl.data.supported;
1340 }
1341
1342 static int qeth_bridgeport_query_ports_cb(struct qeth_card *card,
1343         struct qeth_reply *reply, unsigned long data)
1344 {
1345         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1346         struct qeth_sbp_query_ports *qports = &cmd->data.sbp.data.query_ports;
1347         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1348         int rc;
1349
1350         QETH_CARD_TEXT(card, 2, "brqprtcb");
1351         rc = qeth_bridgeport_makerc(card, cmd);
1352         if (rc)
1353                 return rc;
1354
1355         if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1356                 QETH_CARD_TEXT_(card, 2, "SBPs%04x", qports->entry_length);
1357                 return -EINVAL;
1358         }
1359         /* first entry contains the state of the local port */
1360         if (qports->num_entries > 0) {
1361                 if (cbctl->data.qports.role)
1362                         *cbctl->data.qports.role = qports->entry[0].role;
1363                 if (cbctl->data.qports.state)
1364                         *cbctl->data.qports.state = qports->entry[0].state;
1365         }
1366         return 0;
1367 }
1368
1369 /**
1370  * qeth_bridgeport_query_ports() - query local bridgeport status.
1371  * @card:                          qeth_card structure pointer.
1372  * @role:   Role of the port: 0-none, 1-primary, 2-secondary.
1373  * @state:  State of the port: 0-inactive, 1-standby, 2-active.
1374  *
1375  * Returns negative errno-compatible error indication or 0 on success.
1376  *
1377  * 'role' and 'state' are not updated in case of hardware operation failure.
1378  */
1379 int qeth_bridgeport_query_ports(struct qeth_card *card,
1380         enum qeth_sbp_roles *role, enum qeth_sbp_states *state)
1381 {
1382         struct qeth_cmd_buffer *iob;
1383         struct _qeth_sbp_cbctl cbctl = {
1384                 .data = {
1385                         .qports = {
1386                                 .role = role,
1387                                 .state = state,
1388                         },
1389                 },
1390         };
1391
1392         QETH_CARD_TEXT(card, 2, "brqports");
1393         if (!(card->options.sbp.supported_funcs & IPA_SBP_QUERY_BRIDGE_PORTS))
1394                 return -EOPNOTSUPP;
1395         iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_BRIDGE_PORTS, 0);
1396         if (!iob)
1397                 return -ENOMEM;
1398
1399         return qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_ports_cb,
1400                                  &cbctl);
1401 }
1402
1403 static int qeth_bridgeport_set_cb(struct qeth_card *card,
1404         struct qeth_reply *reply, unsigned long data)
1405 {
1406         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
1407
1408         QETH_CARD_TEXT(card, 2, "brsetrcb");
1409         return qeth_bridgeport_makerc(card, cmd);
1410 }
1411
1412 /**
1413  * qeth_bridgeport_setrole() - Assign primary role to the port.
1414  * @card:                      qeth_card structure pointer.
1415  * @role:                      Role to assign.
1416  *
1417  * Returns negative errno-compatible error indication or 0 on success.
1418  */
1419 int qeth_bridgeport_setrole(struct qeth_card *card, enum qeth_sbp_roles role)
1420 {
1421         struct qeth_cmd_buffer *iob;
1422         enum qeth_ipa_sbp_cmd setcmd;
1423         unsigned int cmdlength = 0;
1424
1425         QETH_CARD_TEXT(card, 2, "brsetrol");
1426         switch (role) {
1427         case QETH_SBP_ROLE_NONE:
1428                 setcmd = IPA_SBP_RESET_BRIDGE_PORT_ROLE;
1429                 break;
1430         case QETH_SBP_ROLE_PRIMARY:
1431                 setcmd = IPA_SBP_SET_PRIMARY_BRIDGE_PORT;
1432                 cmdlength = SBP_DATA_SIZEOF(set_primary);
1433                 break;
1434         case QETH_SBP_ROLE_SECONDARY:
1435                 setcmd = IPA_SBP_SET_SECONDARY_BRIDGE_PORT;
1436                 break;
1437         default:
1438                 return -EINVAL;
1439         }
1440         if (!(card->options.sbp.supported_funcs & setcmd))
1441                 return -EOPNOTSUPP;
1442         iob = qeth_sbp_build_cmd(card, setcmd, cmdlength);
1443         if (!iob)
1444                 return -ENOMEM;
1445
1446         return qeth_send_ipa_cmd(card, iob, qeth_bridgeport_set_cb, NULL);
1447 }
1448
1449 /**
1450  * qeth_anset_makerc() - derive "traditional" error from hardware codes.
1451  * @card:                     qeth_card structure pointer, for debug messages.
1452  *
1453  * Returns negative errno-compatible error indication or 0 on success.
1454  */
1455 static int qeth_anset_makerc(struct qeth_card *card, int pnso_rc, u16 response)
1456 {
1457         int rc;
1458
1459         if (pnso_rc == 0)
1460                 switch (response) {
1461                 case 0x0001:
1462                         rc = 0;
1463                         break;
1464                 case 0x0004:
1465                 case 0x0100:
1466                 case 0x0106:
1467                         rc = -EOPNOTSUPP;
1468                         dev_err(&card->gdev->dev,
1469                                 "Setting address notification failed\n");
1470                         break;
1471                 case 0x0107:
1472                         rc = -EAGAIN;
1473                         break;
1474                 default:
1475                         rc = -EIO;
1476                 }
1477         else
1478                 rc = -EIO;
1479
1480         if (rc) {
1481                 QETH_CARD_TEXT_(card, 2, "SBPp%04x", pnso_rc);
1482                 QETH_CARD_TEXT_(card, 2, "SBPr%04x", response);
1483         }
1484         return rc;
1485 }
1486
1487 static void qeth_bridgeport_an_set_cb(void *priv,
1488                 enum qdio_brinfo_entry_type type, void *entry)
1489 {
1490         struct qeth_card *card = (struct qeth_card *)priv;
1491         struct qdio_brinfo_entry_l2 *l2entry;
1492         u8 code;
1493
1494         if (type != l2_addr_lnid) {
1495                 WARN_ON_ONCE(1);
1496                 return;
1497         }
1498
1499         l2entry = (struct qdio_brinfo_entry_l2 *)entry;
1500         code = IPA_ADDR_CHANGE_CODE_MACADDR;
1501         if (l2entry->addr_lnid.lnid < VLAN_N_VID)
1502                 code |= IPA_ADDR_CHANGE_CODE_VLANID;
1503         qeth_bridge_emit_host_event(card, anev_reg_unreg, code,
1504                 (struct net_if_token *)&l2entry->nit,
1505                 (struct mac_addr_lnid *)&l2entry->addr_lnid);
1506 }
1507
1508 /**
1509  * qeth_bridgeport_an_set() - Enable or disable bridgeport address notification
1510  * @card:                     qeth_card structure pointer.
1511  * @enable:                   0 - disable, non-zero - enable notifications
1512  *
1513  * Returns negative errno-compatible error indication or 0 on success.
1514  *
1515  * On enable, emits a series of address notifications udev events for all
1516  * currently registered hosts.
1517  */
1518 int qeth_bridgeport_an_set(struct qeth_card *card, int enable)
1519 {
1520         int rc;
1521         u16 response;
1522         struct ccw_device *ddev;
1523         struct subchannel_id schid;
1524
1525         if (!card->options.sbp.supported_funcs)
1526                 return -EOPNOTSUPP;
1527         ddev = CARD_DDEV(card);
1528         ccw_device_get_schid(ddev, &schid);
1529
1530         if (enable) {
1531                 qeth_bridge_emit_host_event(card, anev_reset, 0, NULL, NULL);
1532                 rc = qdio_pnso_brinfo(schid, 1, &response,
1533                         qeth_bridgeport_an_set_cb, card);
1534         } else
1535                 rc = qdio_pnso_brinfo(schid, 0, &response, NULL, NULL);
1536         return qeth_anset_makerc(card, rc, response);
1537 }
1538
1539 static bool qeth_bridgeport_is_in_use(struct qeth_card *card)
1540 {
1541         return (card->options.sbp.role || card->options.sbp.reflect_promisc ||
1542                 card->options.sbp.hostnotification);
1543 }
1544
1545 /* VNIC Characteristics support */
1546
1547 /* handle VNICC IPA command return codes; convert to error codes */
1548 static int qeth_l2_vnicc_makerc(struct qeth_card *card, u16 ipa_rc)
1549 {
1550         int rc;
1551
1552         switch (ipa_rc) {
1553         case IPA_RC_SUCCESS:
1554                 return ipa_rc;
1555         case IPA_RC_L2_UNSUPPORTED_CMD:
1556         case IPA_RC_NOTSUPP:
1557                 rc = -EOPNOTSUPP;
1558                 break;
1559         case IPA_RC_VNICC_OOSEQ:
1560                 rc = -EALREADY;
1561                 break;
1562         case IPA_RC_VNICC_VNICBP:
1563                 rc = -EBUSY;
1564                 break;
1565         case IPA_RC_L2_ADDR_TABLE_FULL:
1566                 rc = -ENOSPC;
1567                 break;
1568         case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
1569                 rc = -EACCES;
1570                 break;
1571         default:
1572                 rc = -EIO;
1573         }
1574
1575         QETH_CARD_TEXT_(card, 2, "err%04x", ipa_rc);
1576         return rc;
1577 }
1578
1579 /* generic VNICC request call back */
1580 static int qeth_l2_vnicc_request_cb(struct qeth_card *card,
1581                                     struct qeth_reply *reply,
1582                                     unsigned long data)
1583 {
1584         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1585         struct qeth_ipacmd_vnicc *rep = &cmd->data.vnicc;
1586         u32 sub_cmd = cmd->data.vnicc.hdr.sub_command;
1587
1588         QETH_CARD_TEXT(card, 2, "vniccrcb");
1589         if (cmd->hdr.return_code)
1590                 return qeth_l2_vnicc_makerc(card, cmd->hdr.return_code);
1591         /* return results to caller */
1592         card->options.vnicc.sup_chars = rep->vnicc_cmds.supported;
1593         card->options.vnicc.cur_chars = rep->vnicc_cmds.enabled;
1594
1595         if (sub_cmd == IPA_VNICC_QUERY_CMDS)
1596                 *(u32 *)reply->param = rep->data.query_cmds.sup_cmds;
1597         else if (sub_cmd == IPA_VNICC_GET_TIMEOUT)
1598                 *(u32 *)reply->param = rep->data.getset_timeout.timeout;
1599
1600         return 0;
1601 }
1602
1603 static struct qeth_cmd_buffer *qeth_l2_vnicc_build_cmd(struct qeth_card *card,
1604                                                        u32 vnicc_cmd,
1605                                                        unsigned int data_length)
1606 {
1607         struct qeth_ipacmd_vnicc_hdr *hdr;
1608         struct qeth_cmd_buffer *iob;
1609
1610         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_VNICC, QETH_PROT_NONE,
1611                                  data_length +
1612                                  offsetof(struct qeth_ipacmd_vnicc, data));
1613         if (!iob)
1614                 return NULL;
1615
1616         hdr = &__ipa_cmd(iob)->data.vnicc.hdr;
1617         hdr->data_length = sizeof(*hdr) + data_length;
1618         hdr->sub_command = vnicc_cmd;
1619         return iob;
1620 }
1621
1622 /* VNICC query VNIC characteristics request */
1623 static int qeth_l2_vnicc_query_chars(struct qeth_card *card)
1624 {
1625         struct qeth_cmd_buffer *iob;
1626
1627         QETH_CARD_TEXT(card, 2, "vniccqch");
1628         iob = qeth_l2_vnicc_build_cmd(card, IPA_VNICC_QUERY_CHARS, 0);
1629         if (!iob)
1630                 return -ENOMEM;
1631
1632         return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, NULL);
1633 }
1634
1635 /* VNICC query sub commands request */
1636 static int qeth_l2_vnicc_query_cmds(struct qeth_card *card, u32 vnic_char,
1637                                     u32 *sup_cmds)
1638 {
1639         struct qeth_cmd_buffer *iob;
1640
1641         QETH_CARD_TEXT(card, 2, "vniccqcm");
1642         iob = qeth_l2_vnicc_build_cmd(card, IPA_VNICC_QUERY_CMDS,
1643                                       VNICC_DATA_SIZEOF(query_cmds));
1644         if (!iob)
1645                 return -ENOMEM;
1646
1647         __ipa_cmd(iob)->data.vnicc.data.query_cmds.vnic_char = vnic_char;
1648
1649         return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, sup_cmds);
1650 }
1651
1652 /* VNICC enable/disable characteristic request */
1653 static int qeth_l2_vnicc_set_char(struct qeth_card *card, u32 vnic_char,
1654                                       u32 cmd)
1655 {
1656         struct qeth_cmd_buffer *iob;
1657
1658         QETH_CARD_TEXT(card, 2, "vniccedc");
1659         iob = qeth_l2_vnicc_build_cmd(card, cmd, VNICC_DATA_SIZEOF(set_char));
1660         if (!iob)
1661                 return -ENOMEM;
1662
1663         __ipa_cmd(iob)->data.vnicc.data.set_char.vnic_char = vnic_char;
1664
1665         return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, NULL);
1666 }
1667
1668 /* VNICC get/set timeout for characteristic request */
1669 static int qeth_l2_vnicc_getset_timeout(struct qeth_card *card, u32 vnicc,
1670                                         u32 cmd, u32 *timeout)
1671 {
1672         struct qeth_vnicc_getset_timeout *getset_timeout;
1673         struct qeth_cmd_buffer *iob;
1674
1675         QETH_CARD_TEXT(card, 2, "vniccgst");
1676         iob = qeth_l2_vnicc_build_cmd(card, cmd,
1677                                       VNICC_DATA_SIZEOF(getset_timeout));
1678         if (!iob)
1679                 return -ENOMEM;
1680
1681         getset_timeout = &__ipa_cmd(iob)->data.vnicc.data.getset_timeout;
1682         getset_timeout->vnic_char = vnicc;
1683
1684         if (cmd == IPA_VNICC_SET_TIMEOUT)
1685                 getset_timeout->timeout = *timeout;
1686
1687         return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, timeout);
1688 }
1689
1690 /* set current VNICC flag state; called from sysfs store function */
1691 int qeth_l2_vnicc_set_state(struct qeth_card *card, u32 vnicc, bool state)
1692 {
1693         int rc = 0;
1694         u32 cmd;
1695
1696         QETH_CARD_TEXT(card, 2, "vniccsch");
1697
1698         /* check if characteristic and enable/disable are supported */
1699         if (!(card->options.vnicc.sup_chars & vnicc) ||
1700             !(card->options.vnicc.set_char_sup & vnicc))
1701                 return -EOPNOTSUPP;
1702
1703         if (qeth_bridgeport_is_in_use(card))
1704                 return -EBUSY;
1705
1706         /* set enable/disable command and store wanted characteristic */
1707         if (state) {
1708                 cmd = IPA_VNICC_ENABLE;
1709                 card->options.vnicc.wanted_chars |= vnicc;
1710         } else {
1711                 cmd = IPA_VNICC_DISABLE;
1712                 card->options.vnicc.wanted_chars &= ~vnicc;
1713         }
1714
1715         /* do we need to do anything? */
1716         if (card->options.vnicc.cur_chars == card->options.vnicc.wanted_chars)
1717                 return rc;
1718
1719         /* if card is not ready, simply stop here */
1720         if (!qeth_card_hw_is_reachable(card)) {
1721                 if (state)
1722                         card->options.vnicc.cur_chars |= vnicc;
1723                 else
1724                         card->options.vnicc.cur_chars &= ~vnicc;
1725                 return rc;
1726         }
1727
1728         rc = qeth_l2_vnicc_set_char(card, vnicc, cmd);
1729         if (rc)
1730                 card->options.vnicc.wanted_chars =
1731                         card->options.vnicc.cur_chars;
1732         else {
1733                 /* successful online VNICC change; handle special cases */
1734                 if (state && vnicc == QETH_VNICC_RX_BCAST)
1735                         card->options.vnicc.rx_bcast_enabled = true;
1736                 if (!state && vnicc == QETH_VNICC_LEARNING)
1737                         qeth_l2_vnicc_recover_timeout(card, vnicc,
1738                                         &card->options.vnicc.learning_timeout);
1739         }
1740
1741         return rc;
1742 }
1743
1744 /* get current VNICC flag state; called from sysfs show function */
1745 int qeth_l2_vnicc_get_state(struct qeth_card *card, u32 vnicc, bool *state)
1746 {
1747         int rc = 0;
1748
1749         QETH_CARD_TEXT(card, 2, "vniccgch");
1750
1751         /* check if characteristic is supported */
1752         if (!(card->options.vnicc.sup_chars & vnicc))
1753                 return -EOPNOTSUPP;
1754
1755         if (qeth_bridgeport_is_in_use(card))
1756                 return -EBUSY;
1757
1758         /* if card is ready, query current VNICC state */
1759         if (qeth_card_hw_is_reachable(card))
1760                 rc = qeth_l2_vnicc_query_chars(card);
1761
1762         *state = (card->options.vnicc.cur_chars & vnicc) ? true : false;
1763         return rc;
1764 }
1765
1766 /* set VNICC timeout; called from sysfs store function. Currently, only learning
1767  * supports timeout
1768  */
1769 int qeth_l2_vnicc_set_timeout(struct qeth_card *card, u32 timeout)
1770 {
1771         int rc = 0;
1772
1773         QETH_CARD_TEXT(card, 2, "vniccsto");
1774
1775         /* check if characteristic and set_timeout are supported */
1776         if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
1777             !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
1778                 return -EOPNOTSUPP;
1779
1780         if (qeth_bridgeport_is_in_use(card))
1781                 return -EBUSY;
1782
1783         /* do we need to do anything? */
1784         if (card->options.vnicc.learning_timeout == timeout)
1785                 return rc;
1786
1787         /* if card is not ready, simply store the value internally and return */
1788         if (!qeth_card_hw_is_reachable(card)) {
1789                 card->options.vnicc.learning_timeout = timeout;
1790                 return rc;
1791         }
1792
1793         /* send timeout value to card; if successful, store value internally */
1794         rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
1795                                           IPA_VNICC_SET_TIMEOUT, &timeout);
1796         if (!rc)
1797                 card->options.vnicc.learning_timeout = timeout;
1798
1799         return rc;
1800 }
1801
1802 /* get current VNICC timeout; called from sysfs show function. Currently, only
1803  * learning supports timeout
1804  */
1805 int qeth_l2_vnicc_get_timeout(struct qeth_card *card, u32 *timeout)
1806 {
1807         int rc = 0;
1808
1809         QETH_CARD_TEXT(card, 2, "vniccgto");
1810
1811         /* check if characteristic and get_timeout are supported */
1812         if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
1813             !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
1814                 return -EOPNOTSUPP;
1815
1816         if (qeth_bridgeport_is_in_use(card))
1817                 return -EBUSY;
1818
1819         /* if card is ready, get timeout. Otherwise, just return stored value */
1820         *timeout = card->options.vnicc.learning_timeout;
1821         if (qeth_card_hw_is_reachable(card))
1822                 rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
1823                                                   IPA_VNICC_GET_TIMEOUT,
1824                                                   timeout);
1825
1826         return rc;
1827 }
1828
1829 /* check if VNICC is currently enabled */
1830 bool qeth_l2_vnicc_is_in_use(struct qeth_card *card)
1831 {
1832         if (!card->options.vnicc.sup_chars)
1833                 return false;
1834         /* default values are only OK if rx_bcast was not enabled by user
1835          * or the card is offline.
1836          */
1837         if (card->options.vnicc.cur_chars == QETH_VNICC_DEFAULT) {
1838                 if (!card->options.vnicc.rx_bcast_enabled ||
1839                     !qeth_card_hw_is_reachable(card))
1840                         return false;
1841         }
1842         return true;
1843 }
1844
1845 /* recover user timeout setting */
1846 static bool qeth_l2_vnicc_recover_timeout(struct qeth_card *card, u32 vnicc,
1847                                           u32 *timeout)
1848 {
1849         if (card->options.vnicc.sup_chars & vnicc &&
1850             card->options.vnicc.getset_timeout_sup & vnicc &&
1851             !qeth_l2_vnicc_getset_timeout(card, vnicc, IPA_VNICC_SET_TIMEOUT,
1852                                           timeout))
1853                 return false;
1854         *timeout = QETH_VNICC_DEFAULT_TIMEOUT;
1855         return true;
1856 }
1857
1858 /* recover user characteristic setting */
1859 static bool qeth_l2_vnicc_recover_char(struct qeth_card *card, u32 vnicc,
1860                                        bool enable)
1861 {
1862         u32 cmd = enable ? IPA_VNICC_ENABLE : IPA_VNICC_DISABLE;
1863
1864         if (card->options.vnicc.sup_chars & vnicc &&
1865             card->options.vnicc.set_char_sup & vnicc &&
1866             !qeth_l2_vnicc_set_char(card, vnicc, cmd))
1867                 return false;
1868         card->options.vnicc.wanted_chars &= ~vnicc;
1869         card->options.vnicc.wanted_chars |= QETH_VNICC_DEFAULT & vnicc;
1870         return true;
1871 }
1872
1873 /* (re-)initialize VNICC */
1874 static void qeth_l2_vnicc_init(struct qeth_card *card)
1875 {
1876         u32 *timeout = &card->options.vnicc.learning_timeout;
1877         bool enable, error = false;
1878         unsigned int chars_len, i;
1879         unsigned long chars_tmp;
1880         u32 sup_cmds, vnicc;
1881
1882         QETH_CARD_TEXT(card, 2, "vniccini");
1883         /* reset rx_bcast */
1884         card->options.vnicc.rx_bcast_enabled = 0;
1885         /* initial query and storage of VNIC characteristics */
1886         if (qeth_l2_vnicc_query_chars(card)) {
1887                 if (card->options.vnicc.wanted_chars != QETH_VNICC_DEFAULT ||
1888                     *timeout != QETH_VNICC_DEFAULT_TIMEOUT)
1889                         dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
1890                 /* fail quietly if user didn't change the default config */
1891                 card->options.vnicc.sup_chars = 0;
1892                 card->options.vnicc.cur_chars = 0;
1893                 card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
1894                 return;
1895         }
1896         /* get supported commands for each supported characteristic */
1897         chars_tmp = card->options.vnicc.sup_chars;
1898         chars_len = sizeof(card->options.vnicc.sup_chars) * BITS_PER_BYTE;
1899         for_each_set_bit(i, &chars_tmp, chars_len) {
1900                 vnicc = BIT(i);
1901                 if (qeth_l2_vnicc_query_cmds(card, vnicc, &sup_cmds)) {
1902                         sup_cmds = 0;
1903                         error = true;
1904                 }
1905                 if ((sup_cmds & IPA_VNICC_SET_TIMEOUT) &&
1906                     (sup_cmds & IPA_VNICC_GET_TIMEOUT))
1907                         card->options.vnicc.getset_timeout_sup |= vnicc;
1908                 else
1909                         card->options.vnicc.getset_timeout_sup &= ~vnicc;
1910                 if ((sup_cmds & IPA_VNICC_ENABLE) &&
1911                     (sup_cmds & IPA_VNICC_DISABLE))
1912                         card->options.vnicc.set_char_sup |= vnicc;
1913                 else
1914                         card->options.vnicc.set_char_sup &= ~vnicc;
1915         }
1916         /* enforce assumed default values and recover settings, if changed  */
1917         error |= qeth_l2_vnicc_recover_timeout(card, QETH_VNICC_LEARNING,
1918                                                timeout);
1919         /* Change chars, if necessary  */
1920         chars_tmp = card->options.vnicc.wanted_chars ^
1921                     card->options.vnicc.cur_chars;
1922         chars_len = sizeof(card->options.vnicc.wanted_chars) * BITS_PER_BYTE;
1923         for_each_set_bit(i, &chars_tmp, chars_len) {
1924                 vnicc = BIT(i);
1925                 enable = card->options.vnicc.wanted_chars & vnicc;
1926                 error |= qeth_l2_vnicc_recover_char(card, vnicc, enable);
1927         }
1928         if (error)
1929                 dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
1930 }
1931
1932 /* configure default values of VNIC characteristics */
1933 static void qeth_l2_vnicc_set_defaults(struct qeth_card *card)
1934 {
1935         /* characteristics values */
1936         card->options.vnicc.sup_chars = QETH_VNICC_ALL;
1937         card->options.vnicc.cur_chars = QETH_VNICC_DEFAULT;
1938         card->options.vnicc.learning_timeout = QETH_VNICC_DEFAULT_TIMEOUT;
1939         /* supported commands */
1940         card->options.vnicc.set_char_sup = QETH_VNICC_ALL;
1941         card->options.vnicc.getset_timeout_sup = QETH_VNICC_LEARNING;
1942         /* settings wanted by users */
1943         card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
1944 }
1945
1946 module_init(qeth_l2_init);
1947 module_exit(qeth_l2_exit);
1948 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1949 MODULE_DESCRIPTION("qeth layer 2 discipline");
1950 MODULE_LICENSE("GPL");