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