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/chsc.h>
  24 #include <asm/setup.h>
  25 #include "qeth_core.h"
  26 #include "qeth_l2.h"
  27
  28 static void qeth_bridgeport_query_support(struct qeth_card *card);
  29 static void qeth_bridge_state_change(struct qeth_card *card,
  30                                         struct qeth_ipa_cmd *cmd);
  31 static void qeth_addr_change_event(struct qeth_card *card,
  32                                    struct qeth_ipa_cmd *cmd);
  33 static void qeth_l2_vnicc_set_defaults(struct qeth_card *card);
  34 static void qeth_l2_vnicc_init(struct qeth_card *card);
  35 static bool qeth_l2_vnicc_recover_timeout(struct qeth_card *card, u32 vnicc,
  36                                           u32 *timeout);
  37
  38 static int qeth_l2_setdelmac_makerc(struct qeth_card *card, u16 retcode)
  39 {
  40         int rc;
  41
  42         if (retcode)
  43                 QETH_CARD_TEXT_(card, 2, "err%04x", retcode);
  44         switch (retcode) {
  45         case IPA_RC_SUCCESS:
  46                 rc = 0;
  47                 break;
  48         case IPA_RC_L2_UNSUPPORTED_CMD:
  49                 rc = -EOPNOTSUPP;
  50                 break;
  51         case IPA_RC_L2_ADDR_TABLE_FULL:
  52                 rc = -ENOSPC;
  53                 break;
  54         case IPA_RC_L2_DUP_MAC:
  55         case IPA_RC_L2_DUP_LAYER3_MAC:
  56                 rc = -EADDRINUSE;
  57                 break;
  58         case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
  59         case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
  60                 rc = -EADDRNOTAVAIL;
  61                 break;
  62         case IPA_RC_L2_MAC_NOT_FOUND:
  63                 rc = -ENOENT;
  64                 break;
  65         default:
  66                 rc = -EIO;
  67                 break;
  68         }
  69         return rc;
  70 }
  71
  72 static int qeth_l2_send_setdelmac_cb(struct qeth_card *card,
  73                                      struct qeth_reply *reply,
  74                                      unsigned long data)
  75 {
  76         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
  77
  78         return qeth_l2_setdelmac_makerc(card, cmd->hdr.return_code);
  79 }
  80
  81 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
  82                            enum qeth_ipa_cmds ipacmd)
  83 {
  84         struct qeth_ipa_cmd *cmd;
  85         struct qeth_cmd_buffer *iob;
  86
  87         QETH_CARD_TEXT(card, 2, "L2sdmac");
  88         iob = qeth_ipa_alloc_cmd(card, ipacmd, QETH_PROT_IPV4,
  89                                  IPA_DATA_SIZEOF(setdelmac));
  90         if (!iob)
  91                 return -ENOMEM;
  92         cmd = __ipa_cmd(iob);
  93         cmd->data.setdelmac.mac_length = ETH_ALEN;
  94         ether_addr_copy(cmd->data.setdelmac.mac, mac);
  95         return qeth_send_ipa_cmd(card, iob, qeth_l2_send_setdelmac_cb, NULL);
  96 }
  97
  98 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
  99 {
 100         int rc;
 101
 102         QETH_CARD_TEXT(card, 2, "L2Setmac");
 103         rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC);
 104         if (rc == 0) {
 105                 dev_info(&card->gdev->dev,
 106                          "MAC address %pM successfully registered\n", mac);
 107         } else {
 108                 switch (rc) {
 109                 case -EADDRINUSE:
 110                         dev_warn(&card->gdev->dev,
 111                                 "MAC address %pM already exists\n", mac);
 112                         break;
 113                 case -EADDRNOTAVAIL:
 114                         dev_warn(&card->gdev->dev,
 115                                 "MAC address %pM is not authorized\n", mac);
 116                         break;
 117                 }
 118         }
 119         return rc;
 120 }
 121
 122 static int qeth_l2_write_mac(struct qeth_card *card, u8 *mac)
 123 {
 124         enum qeth_ipa_cmds cmd = is_multicast_ether_addr(mac) ?
 125                                         IPA_CMD_SETGMAC : IPA_CMD_SETVMAC;
 126         int rc;
 127
 128         QETH_CARD_TEXT(card, 2, "L2Wmac");
 129         rc = qeth_l2_send_setdelmac(card, mac, cmd);
 130         if (rc == -EADDRINUSE)
 131                 QETH_DBF_MESSAGE(2, "MAC already registered on device %x\n",
 132                                  CARD_DEVID(card));
 133         else if (rc)
 134                 QETH_DBF_MESSAGE(2, "Failed to register MAC on device %x: %d\n",
 135                                  CARD_DEVID(card), rc);
 136         return rc;
 137 }
 138
 139 static int qeth_l2_remove_mac(struct qeth_card *card, u8 *mac)
 140 {
 141         enum qeth_ipa_cmds cmd = is_multicast_ether_addr(mac) ?
 142                                         IPA_CMD_DELGMAC : IPA_CMD_DELVMAC;
 143         int rc;
 144
 145         QETH_CARD_TEXT(card, 2, "L2Rmac");
 146         rc = qeth_l2_send_setdelmac(card, mac, cmd);
 147         if (rc)
 148                 QETH_DBF_MESSAGE(2, "Failed to delete MAC on device %u: %d\n",
 149                                  CARD_DEVID(card), rc);
 150         return rc;
 151 }
 152
 153 static void qeth_l2_drain_rx_mode_cache(struct qeth_card *card)
 154 {
 155         struct qeth_mac *mac;
 156         struct hlist_node *tmp;
 157         int i;
 158
 159         hash_for_each_safe(card->rx_mode_addrs, i, tmp, mac, hnode) {
 160                 hash_del(&mac->hnode);
 161                 kfree(mac);
 162         }
 163 }
 164
 165 static void qeth_l2_fill_header(struct qeth_qdio_out_q *queue,
 166                                 struct qeth_hdr *hdr, struct sk_buff *skb,
 167                                 int ipv, unsigned int data_len)
 168 {
 169         int cast_type = qeth_get_ether_cast_type(skb);
 170         struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
 171
 172         hdr->hdr.l2.pkt_length = data_len;
 173
 174         if (skb_is_gso(skb)) {
 175                 hdr->hdr.l2.id = QETH_HEADER_TYPE_L2_TSO;
 176         } else {
 177                 hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
 178                 if (skb->ip_summed == CHECKSUM_PARTIAL)
 179                         qeth_tx_csum(skb, &hdr->hdr.l2.flags[1], ipv);
 180         }
 181
 182         /* set byte byte 3 to casting flags */
 183         if (cast_type == RTN_MULTICAST)
 184                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 185         else if (cast_type == RTN_BROADCAST)
 186                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 187         else
 188                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 189
 190         /* VSWITCH relies on the VLAN
 191          * information to be present in
 192          * the QDIO header */
 193         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
 194                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
 195                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
 196         }
 197 }
 198
 199 static int qeth_l2_setdelvlan_makerc(struct qeth_card *card, u16 retcode)
 200 {
 201         if (retcode)
 202                 QETH_CARD_TEXT_(card, 2, "err%04x", retcode);
 203
 204         switch (retcode) {
 205         case IPA_RC_SUCCESS:
 206                 return 0;
 207         case IPA_RC_L2_INVALID_VLAN_ID:
 208                 return -EINVAL;
 209         case IPA_RC_L2_DUP_VLAN_ID:
 210                 return -EEXIST;
 211         case IPA_RC_L2_VLAN_ID_NOT_FOUND:
 212                 return -ENOENT;
 213         case IPA_RC_L2_VLAN_ID_NOT_ALLOWED:
 214                 return -EPERM;
 215         default:
 216                 return -EIO;
 217         }
 218 }
 219
 220 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
 221                                       struct qeth_reply *reply,
 222                                       unsigned long data)
 223 {
 224         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
 225
 226         QETH_CARD_TEXT(card, 2, "L2sdvcb");
 227         if (cmd->hdr.return_code) {
 228                 QETH_DBF_MESSAGE(2, "Error in processing VLAN %u on device %x: %#x.\n",
 229                                  cmd->data.setdelvlan.vlan_id,
 230                                  CARD_DEVID(card), cmd->hdr.return_code);
 231                 QETH_CARD_TEXT_(card, 2, "L2VL%4x", cmd->hdr.command);
 232         }
 233         return qeth_l2_setdelvlan_makerc(card, cmd->hdr.return_code);
 234 }
 235
 236 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
 237                                    enum qeth_ipa_cmds ipacmd)
 238 {
 239         struct qeth_ipa_cmd *cmd;
 240         struct qeth_cmd_buffer *iob;
 241
 242         QETH_CARD_TEXT_(card, 4, "L2sdv%x", ipacmd);
 243         iob = qeth_ipa_alloc_cmd(card, ipacmd, QETH_PROT_IPV4,
 244                                  IPA_DATA_SIZEOF(setdelvlan));
 245         if (!iob)
 246                 return -ENOMEM;
 247         cmd = __ipa_cmd(iob);
 248         cmd->data.setdelvlan.vlan_id = i;
 249         return qeth_send_ipa_cmd(card, iob, qeth_l2_send_setdelvlan_cb, NULL);
 250 }
 251
 252 static int qeth_l2_vlan_rx_add_vid(struct net_device *dev,
 253                                    __be16 proto, u16 vid)
 254 {
 255         struct qeth_card *card = dev->ml_priv;
 256
 257         QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
 258         if (!vid)
 259                 return 0;
 260
 261         return qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
 262 }
 263
 264 static int qeth_l2_vlan_rx_kill_vid(struct net_device *dev,
 265                                     __be16 proto, u16 vid)
 266 {
 267         struct qeth_card *card = dev->ml_priv;
 268
 269         QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
 270         if (!vid)
 271                 return 0;
 272
 273         return qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 274 }
 275
 276 static void qeth_l2_stop_card(struct qeth_card *card)
 277 {
 278         QETH_CARD_TEXT(card, 2, "stopcard");
 279
 280         qeth_set_allowed_threads(card, 0, 1);
 281
 282         cancel_work_sync(&card->rx_mode_work);
 283         qeth_l2_drain_rx_mode_cache(card);
 284
 285         if (card->state == CARD_STATE_SOFTSETUP) {
 286                 qeth_clear_ipacmd_list(card);
 287                 qeth_drain_output_queues(card);
 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         qeth_flush_local_addrs(card);
 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.dev_addr_is_registered = 1;
 341         else
 342                 card->info.dev_addr_is_registered = 0;
 343 }
 344
 345 static int qeth_l2_validate_addr(struct net_device *dev)
 346 {
 347         struct qeth_card *card = dev->ml_priv;
 348
 349         if (card->info.dev_addr_is_registered)
 350                 return eth_validate_addr(dev);
 351
 352         QETH_CARD_TEXT(card, 4, "nomacadr");
 353         return -EPERM;
 354 }
 355
 356 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 357 {
 358         struct sockaddr *addr = p;
 359         struct qeth_card *card = dev->ml_priv;
 360         u8 old_addr[ETH_ALEN];
 361         int rc = 0;
 362
 363         QETH_CARD_TEXT(card, 3, "setmac");
 364
 365         if (IS_OSM(card) || IS_OSX(card)) {
 366                 QETH_CARD_TEXT(card, 3, "setmcTYP");
 367                 return -EOPNOTSUPP;
 368         }
 369         QETH_CARD_HEX(card, 3, addr->sa_data, ETH_ALEN);
 370         if (!is_valid_ether_addr(addr->sa_data))
 371                 return -EADDRNOTAVAIL;
 372
 373         /* don't register the same address twice */
 374         if (ether_addr_equal_64bits(dev->dev_addr, addr->sa_data) &&
 375             card->info.dev_addr_is_registered)
 376                 return 0;
 377
 378         /* add the new address, switch over, drop the old */
 379         rc = qeth_l2_send_setmac(card, addr->sa_data);
 380         if (rc)
 381                 return rc;
 382         ether_addr_copy(old_addr, dev->dev_addr);
 383         ether_addr_copy(dev->dev_addr, addr->sa_data);
 384
 385         if (card->info.dev_addr_is_registered)
 386                 qeth_l2_remove_mac(card, old_addr);
 387         card->info.dev_addr_is_registered = 1;
 388         return 0;
 389 }
 390
 391 static void qeth_l2_promisc_to_bridge(struct qeth_card *card, bool enable)
 392 {
 393         int role;
 394         int rc;
 395
 396         QETH_CARD_TEXT(card, 3, "pmisc2br");
 397
 398         if (enable) {
 399                 if (card->options.sbp.reflect_promisc_primary)
 400                         role = QETH_SBP_ROLE_PRIMARY;
 401                 else
 402                         role = QETH_SBP_ROLE_SECONDARY;
 403         } else
 404                 role = QETH_SBP_ROLE_NONE;
 405
 406         rc = qeth_bridgeport_setrole(card, role);
 407         QETH_CARD_TEXT_(card, 2, "bpm%c%04x", enable ? '+' : '-', rc);
 408         if (!rc) {
 409                 card->options.sbp.role = role;
 410                 card->info.promisc_mode = enable;
 411         }
 412 }
 413
 414 static void qeth_l2_set_promisc_mode(struct qeth_card *card)
 415 {
 416         bool enable = card->dev->flags & IFF_PROMISC;
 417
 418         if (card->info.promisc_mode == enable)
 419                 return;
 420
 421         if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE)) {
 422                 qeth_setadp_promisc_mode(card, enable);
 423         } else {
 424                 mutex_lock(&card->sbp_lock);
 425                 if (card->options.sbp.reflect_promisc)
 426                         qeth_l2_promisc_to_bridge(card, enable);
 427                 mutex_unlock(&card->sbp_lock);
 428         }
 429 }
 430
 431 /* New MAC address is added to the hash table and marked to be written on card
 432  * only if there is not in the hash table storage already
 433  *
 434 */
 435 static void qeth_l2_add_mac(struct qeth_card *card, struct netdev_hw_addr *ha)
 436 {
 437         u32 mac_hash = get_unaligned((u32 *)(&ha->addr[2]));
 438         struct qeth_mac *mac;
 439
 440         hash_for_each_possible(card->rx_mode_addrs, mac, hnode, mac_hash) {
 441                 if (ether_addr_equal_64bits(ha->addr, mac->mac_addr)) {
 442                         mac->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
 443                         return;
 444                 }
 445         }
 446
 447         mac = kzalloc(sizeof(struct qeth_mac), GFP_ATOMIC);
 448         if (!mac)
 449                 return;
 450
 451         ether_addr_copy(mac->mac_addr, ha->addr);
 452         mac->disp_flag = QETH_DISP_ADDR_ADD;
 453
 454         hash_add(card->rx_mode_addrs, &mac->hnode, mac_hash);
 455 }
 456
 457 static void qeth_l2_rx_mode_work(struct work_struct *work)
 458 {
 459         struct qeth_card *card = container_of(work, struct qeth_card,
 460                                               rx_mode_work);
 461         struct net_device *dev = card->dev;
 462         struct netdev_hw_addr *ha;
 463         struct qeth_mac *mac;
 464         struct hlist_node *tmp;
 465         int i;
 466         int rc;
 467
 468         QETH_CARD_TEXT(card, 3, "setmulti");
 469
 470         netif_addr_lock_bh(dev);
 471         netdev_for_each_mc_addr(ha, dev)
 472                 qeth_l2_add_mac(card, ha);
 473         netdev_for_each_uc_addr(ha, dev)
 474                 qeth_l2_add_mac(card, ha);
 475         netif_addr_unlock_bh(dev);
 476
 477         hash_for_each_safe(card->rx_mode_addrs, i, tmp, mac, hnode) {
 478                 switch (mac->disp_flag) {
 479                 case QETH_DISP_ADDR_DELETE:
 480                         qeth_l2_remove_mac(card, mac->mac_addr);
 481                         hash_del(&mac->hnode);
 482                         kfree(mac);
 483                         break;
 484                 case QETH_DISP_ADDR_ADD:
 485                         rc = qeth_l2_write_mac(card, mac->mac_addr);
 486                         if (rc) {
 487                                 hash_del(&mac->hnode);
 488                                 kfree(mac);
 489                                 break;
 490                         }
 491                         fallthrough;
 492                 default:
 493                         /* for next call to set_rx_mode(): */
 494                         mac->disp_flag = QETH_DISP_ADDR_DELETE;
 495                 }
 496         }
 497
 498         qeth_l2_set_promisc_mode(card);
 499 }
 500
 501 static int qeth_l2_xmit_osn(struct qeth_card *card, struct sk_buff *skb,
 502                             struct qeth_qdio_out_q *queue)
 503 {
 504         gfp_t gfp = GFP_ATOMIC | (skb_pfmemalloc(skb) ? __GFP_MEMALLOC : 0);
 505         struct qeth_hdr *hdr = (struct qeth_hdr *)skb->data;
 506         addr_t end = (addr_t)(skb->data + sizeof(*hdr));
 507         addr_t start = (addr_t)skb->data;
 508         unsigned int elements = 0;
 509         unsigned int hd_len = 0;
 510         int rc;
 511
 512         if (skb->protocol == htons(ETH_P_IPV6))
 513                 return -EPROTONOSUPPORT;
 514
 515         if (qeth_get_elements_for_range(start, end) > 1) {
 516                 /* Misaligned HW header, move it to its own buffer element. */
 517                 hdr = kmem_cache_alloc(qeth_core_header_cache, gfp);
 518                 if (!hdr)
 519                         return -ENOMEM;
 520                 hd_len = sizeof(*hdr);
 521                 skb_copy_from_linear_data(skb, (char *)hdr, hd_len);
 522                 elements++;
 523         }
 524
 525         elements += qeth_count_elements(skb, hd_len);
 526         if (elements > queue->max_elements) {
 527                 rc = -E2BIG;
 528                 goto out;
 529         }
 530
 531         rc = qeth_do_send_packet(card, queue, skb, hdr, hd_len, hd_len,
 532                                  elements);
 533 out:
 534         if (rc && hd_len)
 535                 kmem_cache_free(qeth_core_header_cache, hdr);
 536         return rc;
 537 }
 538
 539 static netdev_tx_t qeth_l2_hard_start_xmit(struct sk_buff *skb,
 540                                            struct net_device *dev)
 541 {
 542         struct qeth_card *card = dev->ml_priv;
 543         u16 txq = skb_get_queue_mapping(skb);
 544         struct qeth_qdio_out_q *queue;
 545         int rc;
 546
 547         if (!skb_is_gso(skb))
 548                 qdisc_skb_cb(skb)->pkt_len = skb->len;
 549         if (IS_IQD(card))
 550                 txq = qeth_iqd_translate_txq(dev, txq);
 551         queue = card->qdio.out_qs[txq];
 552
 553         if (IS_OSN(card))
 554                 rc = qeth_l2_xmit_osn(card, skb, queue);
 555         else
 556                 rc = qeth_xmit(card, skb, queue, qeth_get_ip_version(skb),
 557                                qeth_l2_fill_header);
 558
 559         if (!rc)
 560                 return NETDEV_TX_OK;
 561
 562         QETH_TXQ_STAT_INC(queue, tx_dropped);
 563         kfree_skb(skb);
 564         return NETDEV_TX_OK;
 565 }
 566
 567 static u16 qeth_l2_select_queue(struct net_device *dev, struct sk_buff *skb,
 568                                 struct net_device *sb_dev)
 569 {
 570         struct qeth_card *card = dev->ml_priv;
 571
 572         if (IS_IQD(card))
 573                 return qeth_iqd_select_queue(dev, skb,
 574                                              qeth_get_ether_cast_type(skb),
 575                                              sb_dev);
 576
 577         return IS_VM_NIC(card) ? netdev_pick_tx(dev, skb, sb_dev) :
 578                                  qeth_get_priority_queue(card, skb);
 579 }
 580
 581 static const struct device_type qeth_l2_devtype = {
 582         .name = "qeth_layer2",
 583         .groups = qeth_l2_attr_groups,
 584 };
 585
 586 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 587 {
 588         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 589         int rc;
 590
 591         if (IS_OSN(card))
 592                 dev_notice(&gdev->dev, "OSN support will be dropped in 2021\n");
 593
 594         qeth_l2_vnicc_set_defaults(card);
 595         mutex_init(&card->sbp_lock);
 596
 597         if (gdev->dev.type == &qeth_generic_devtype) {
 598                 rc = qeth_l2_create_device_attributes(&gdev->dev);
 599                 if (rc)
 600                         return rc;
 601         }
 602
 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 /**
 632  *      qeth_l2_pnso() - perform network subchannel operation
 633  *      @card: qeth_card structure pointer
 634  *      @cnc: Boolean Change-Notification Control
 635  *      @cb: Callback function will be executed for each element
 636  *              of the address list
 637  *      @priv: Pointer to pass to the callback function.
 638  *
 639  *      Collects network information in a network address list and calls the
 640  *      callback function for every entry in the list. If "change-notification-
 641  *      control" is set, further changes in the address list will be reported
 642  *      via the IPA command.
 643  */
 644 static int qeth_l2_pnso(struct qeth_card *card, int cnc,
 645                         void (*cb)(void *priv, struct chsc_pnso_naid_l2 *entry),
 646                         void *priv)
 647 {
 648         struct ccw_device *ddev = CARD_DDEV(card);
 649         struct chsc_pnso_area *rr;
 650         u32 prev_instance = 0;
 651         int isfirstblock = 1;
 652         int i, size, elems;
 653         int rc;
 654
 655         QETH_CARD_TEXT(card, 2, "PNSO");
 656         rr = (struct chsc_pnso_area *)get_zeroed_page(GFP_KERNEL);
 657         if (rr == NULL)
 658                 return -ENOMEM;
 659         do {
 660                 /* on the first iteration, naihdr.resume_token will be zero */
 661                 rc = ccw_device_pnso(ddev, rr, rr->naihdr.resume_token, cnc);
 662                 if (rc)
 663                         continue;
 664                 if (cb == NULL)
 665                         continue;
 666
 667                 size = rr->naihdr.naids;
 668                 if (size != sizeof(struct chsc_pnso_naid_l2)) {
 669                         WARN_ON_ONCE(1);
 670                         continue;
 671                 }
 672
 673                 elems = (rr->response.length - sizeof(struct chsc_header) -
 674                          sizeof(struct chsc_pnso_naihdr)) / size;
 675
 676                 if (!isfirstblock && (rr->naihdr.instance != prev_instance)) {
 677                         /* Inform the caller that they need to scrap */
 678                         /* the data that was already reported via cb */
 679                         rc = -EAGAIN;
 680                         break;
 681                 }
 682                 isfirstblock = 0;
 683                 prev_instance = rr->naihdr.instance;
 684                 for (i = 0; i < elems; i++)
 685                         (*cb)(priv, &rr->entries[i]);
 686         } while ((rc == -EBUSY) || (!rc && /* list stored */
 687                    /* resume token is non-zero => list incomplete */
 688                    (rr->naihdr.resume_token.t1 || rr->naihdr.resume_token.t2)));
 689
 690         if (rc)
 691                 QETH_CARD_TEXT_(card, 2, "PNrp%04x", rr->response.code);
 692
 693         free_page((unsigned long)rr);
 694         return rc;
 695 }
 696
 697 static const struct net_device_ops qeth_l2_netdev_ops = {
 698         .ndo_open               = qeth_open,
 699         .ndo_stop               = qeth_stop,
 700         .ndo_get_stats64        = qeth_get_stats64,
 701         .ndo_start_xmit         = qeth_l2_hard_start_xmit,
 702         .ndo_features_check     = qeth_features_check,
 703         .ndo_select_queue       = qeth_l2_select_queue,
 704         .ndo_validate_addr      = qeth_l2_validate_addr,
 705         .ndo_set_rx_mode        = qeth_l2_set_rx_mode,
 706         .ndo_do_ioctl           = qeth_do_ioctl,
 707         .ndo_set_mac_address    = qeth_l2_set_mac_address,
 708         .ndo_vlan_rx_add_vid    = qeth_l2_vlan_rx_add_vid,
 709         .ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,
 710         .ndo_tx_timeout         = qeth_tx_timeout,
 711         .ndo_fix_features       = qeth_fix_features,
 712         .ndo_set_features       = qeth_set_features
 713 };
 714
 715 static const struct net_device_ops qeth_osn_netdev_ops = {
 716         .ndo_open               = qeth_open,
 717         .ndo_stop               = qeth_stop,
 718         .ndo_get_stats64        = qeth_get_stats64,
 719         .ndo_start_xmit         = qeth_l2_hard_start_xmit,
 720         .ndo_validate_addr      = eth_validate_addr,
 721         .ndo_tx_timeout         = qeth_tx_timeout,
 722 };
 723
 724 static int qeth_l2_setup_netdev(struct qeth_card *card)
 725 {
 726         int rc;
 727
 728         if (IS_OSN(card)) {
 729                 card->dev->netdev_ops = &qeth_osn_netdev_ops;
 730                 card->dev->flags |= IFF_NOARP;
 731                 goto add_napi;
 732         }
 733
 734         rc = qeth_setup_netdev(card);
 735         if (rc)
 736                 return rc;
 737
 738         card->dev->needed_headroom = sizeof(struct qeth_hdr);
 739         card->dev->netdev_ops = &qeth_l2_netdev_ops;
 740         card->dev->priv_flags |= IFF_UNICAST_FLT;
 741
 742         if (IS_OSM(card)) {
 743                 card->dev->features |= NETIF_F_VLAN_CHALLENGED;
 744         } else {
 745                 if (!IS_VM_NIC(card))
 746                         card->dev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
 747                 card->dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
 748         }
 749
 750         if (IS_OSD(card) && !IS_VM_NIC(card)) {
 751                 card->dev->features |= NETIF_F_SG;
 752                 /* OSA 3S and earlier has no RX/TX support */
 753                 if (qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM)) {
 754                         card->dev->hw_features |= NETIF_F_IP_CSUM;
 755                         card->dev->vlan_features |= NETIF_F_IP_CSUM;
 756                 }
 757         }
 758         if (qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) {
 759                 card->dev->hw_features |= NETIF_F_IPV6_CSUM;
 760                 card->dev->vlan_features |= NETIF_F_IPV6_CSUM;
 761         }
 762         if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM) ||
 763             qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6)) {
 764                 card->dev->hw_features |= NETIF_F_RXCSUM;
 765                 card->dev->vlan_features |= NETIF_F_RXCSUM;
 766         }
 767         if (qeth_is_supported(card, IPA_OUTBOUND_TSO)) {
 768                 card->dev->hw_features |= NETIF_F_TSO;
 769                 card->dev->vlan_features |= NETIF_F_TSO;
 770         }
 771         if (qeth_is_supported6(card, IPA_OUTBOUND_TSO)) {
 772                 card->dev->hw_features |= NETIF_F_TSO6;
 773                 card->dev->vlan_features |= NETIF_F_TSO6;
 774         }
 775
 776         if (card->dev->hw_features & (NETIF_F_TSO | NETIF_F_TSO6)) {
 777                 card->dev->needed_headroom = sizeof(struct qeth_hdr_tso);
 778                 netif_keep_dst(card->dev);
 779                 netif_set_gso_max_size(card->dev,
 780                                        PAGE_SIZE * (QDIO_MAX_ELEMENTS_PER_BUFFER - 1));
 781         }
 782
 783 add_napi:
 784         netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT);
 785         return register_netdev(card->dev);
 786 }
 787
 788 static void qeth_l2_trace_features(struct qeth_card *card)
 789 {
 790         /* Set BridgePort features */
 791         QETH_CARD_TEXT(card, 2, "featuSBP");
 792         QETH_CARD_HEX(card, 2, &card->options.sbp.supported_funcs,
 793                       sizeof(card->options.sbp.supported_funcs));
 794         /* VNIC Characteristics features */
 795         QETH_CARD_TEXT(card, 2, "feaVNICC");
 796         QETH_CARD_HEX(card, 2, &card->options.vnicc.sup_chars,
 797                       sizeof(card->options.vnicc.sup_chars));
 798 }
 799
 800 static void qeth_l2_setup_bridgeport_attrs(struct qeth_card *card)
 801 {
 802         if (!card->options.sbp.reflect_promisc &&
 803             card->options.sbp.role != QETH_SBP_ROLE_NONE) {
 804                 /* Conditional to avoid spurious error messages */
 805                 qeth_bridgeport_setrole(card, card->options.sbp.role);
 806                 /* Let the callback function refresh the stored role value. */
 807                 qeth_bridgeport_query_ports(card, &card->options.sbp.role,
 808                                             NULL);
 809         }
 810         if (card->options.sbp.hostnotification) {
 811                 if (qeth_bridgeport_an_set(card, 1))
 812                         card->options.sbp.hostnotification = 0;
 813         } else {
 814                 qeth_bridgeport_an_set(card, 0);
 815         }
 816 }
 817
 818 static int qeth_l2_set_online(struct qeth_card *card)
 819 {
 820         struct ccwgroup_device *gdev = card->gdev;
 821         struct net_device *dev = card->dev;
 822         int rc = 0;
 823         bool carrier_ok;
 824
 825         rc = qeth_core_hardsetup_card(card, &carrier_ok);
 826         if (rc) {
 827                 QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
 828                 rc = -ENODEV;
 829                 goto out_remove;
 830         }
 831
 832         mutex_lock(&card->sbp_lock);
 833         qeth_bridgeport_query_support(card);
 834         if (card->options.sbp.supported_funcs) {
 835                 qeth_l2_setup_bridgeport_attrs(card);
 836                 dev_info(&card->gdev->dev,
 837                          "The device represents a Bridge Capable Port\n");
 838         }
 839         mutex_unlock(&card->sbp_lock);
 840
 841         qeth_l2_register_dev_addr(card);
 842
 843         /* for the rx_bcast characteristic, init VNICC after setmac */
 844         qeth_l2_vnicc_init(card);
 845
 846         qeth_trace_features(card);
 847         qeth_l2_trace_features(card);
 848
 849         qeth_print_status_message(card);
 850
 851         /* softsetup */
 852         QETH_CARD_TEXT(card, 2, "softsetp");
 853
 854         card->state = CARD_STATE_SOFTSETUP;
 855
 856         qeth_set_allowed_threads(card, 0xffffffff, 0);
 857
 858         if (dev->reg_state != NETREG_REGISTERED) {
 859                 rc = qeth_l2_setup_netdev(card);
 860                 if (rc)
 861                         goto out_remove;
 862
 863                 if (carrier_ok)
 864                         netif_carrier_on(dev);
 865         } else {
 866                 rtnl_lock();
 867                 if (carrier_ok)
 868                         netif_carrier_on(dev);
 869                 else
 870                         netif_carrier_off(dev);
 871
 872                 netif_device_attach(dev);
 873                 qeth_enable_hw_features(dev);
 874
 875                 if (card->info.open_when_online) {
 876                         card->info.open_when_online = 0;
 877                         dev_open(dev, NULL);
 878                 }
 879                 rtnl_unlock();
 880         }
 881         /* let user_space know that device is online */
 882         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
 883         return 0;
 884
 885 out_remove:
 886         qeth_l2_stop_card(card);
 887         qeth_stop_channel(&card->data);
 888         qeth_stop_channel(&card->write);
 889         qeth_stop_channel(&card->read);
 890         qdio_free(CARD_DDEV(card));
 891         return rc;
 892 }
 893
 894 static void qeth_l2_set_offline(struct qeth_card *card)
 895 {
 896         qeth_l2_stop_card(card);
 897 }
 898
 899 static int __init qeth_l2_init(void)
 900 {
 901         pr_info("register layer 2 discipline\n");
 902         return 0;
 903 }
 904
 905 static void __exit qeth_l2_exit(void)
 906 {
 907         pr_info("unregister layer 2 discipline\n");
 908 }
 909
 910 /* Returns zero if the command is successfully "consumed" */
 911 static int qeth_l2_control_event(struct qeth_card *card,
 912                                         struct qeth_ipa_cmd *cmd)
 913 {
 914         switch (cmd->hdr.command) {
 915         case IPA_CMD_SETBRIDGEPORT_OSA:
 916         case IPA_CMD_SETBRIDGEPORT_IQD:
 917                 if (cmd->data.sbp.hdr.command_code ==
 918                                 IPA_SBP_BRIDGE_PORT_STATE_CHANGE) {
 919                         qeth_bridge_state_change(card, cmd);
 920                         return 0;
 921                 } else
 922                         return 1;
 923         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
 924                 qeth_addr_change_event(card, cmd);
 925                 return 0;
 926         default:
 927                 return 1;
 928         }
 929 }
 930
 931 struct qeth_discipline qeth_l2_discipline = {
 932         .devtype = &qeth_l2_devtype,
 933         .setup = qeth_l2_probe_device,
 934         .remove = qeth_l2_remove_device,
 935         .set_online = qeth_l2_set_online,
 936         .set_offline = qeth_l2_set_offline,
 937         .do_ioctl = NULL,
 938         .control_event_handler = qeth_l2_control_event,
 939 };
 940 EXPORT_SYMBOL_GPL(qeth_l2_discipline);
 941
 942 #ifdef CONFIG_QETH_OSN
 943 static void qeth_osn_assist_cb(struct qeth_card *card,
 944                                struct qeth_cmd_buffer *iob,
 945                                unsigned int data_length)
 946 {
 947         qeth_notify_cmd(iob, 0);
 948         qeth_put_cmd(iob);
 949 }
 950
 951 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
 952 {
 953         struct qeth_cmd_buffer *iob;
 954         struct qeth_card *card;
 955
 956         if (data_len < 0)
 957                 return -EINVAL;
 958         if (!dev)
 959                 return -ENODEV;
 960         card = dev->ml_priv;
 961         if (!card)
 962                 return -ENODEV;
 963         QETH_CARD_TEXT(card, 2, "osnsdmc");
 964         if (!qeth_card_hw_is_reachable(card))
 965                 return -ENODEV;
 966
 967         iob = qeth_alloc_cmd(&card->write, IPA_PDU_HEADER_SIZE + data_len, 1,
 968                              QETH_IPA_TIMEOUT);
 969         if (!iob)
 970                 return -ENOMEM;
 971
 972         qeth_prepare_ipa_cmd(card, iob, (u16) data_len, NULL);
 973
 974         memcpy(__ipa_cmd(iob), data, data_len);
 975         iob->callback = qeth_osn_assist_cb;
 976         return qeth_send_ipa_cmd(card, iob, NULL, NULL);
 977 }
 978 EXPORT_SYMBOL(qeth_osn_assist);
 979
 980 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
 981                   int (*assist_cb)(struct net_device *, void *),
 982                   int (*data_cb)(struct sk_buff *))
 983 {
 984         struct qeth_card *card;
 985         char bus_id[16];
 986         u16 devno;
 987
 988         memcpy(&devno, read_dev_no, 2);
 989         sprintf(bus_id, "0.0.%04x", devno);
 990         card = qeth_get_card_by_busid(bus_id);
 991         if (!card || !IS_OSN(card))
 992                 return -ENODEV;
 993         *dev = card->dev;
 994
 995         QETH_CARD_TEXT(card, 2, "osnreg");
 996         if ((assist_cb == NULL) || (data_cb == NULL))
 997                 return -EINVAL;
 998         card->osn_info.assist_cb = assist_cb;
 999         card->osn_info.data_cb = data_cb;
1000         return 0;
1001 }
1002 EXPORT_SYMBOL(qeth_osn_register);
1003
1004 void qeth_osn_deregister(struct net_device *dev)
1005 {
1006         struct qeth_card *card;
1007
1008         if (!dev)
1009                 return;
1010         card = dev->ml_priv;
1011         if (!card)
1012                 return;
1013         QETH_CARD_TEXT(card, 2, "osndereg");
1014         card->osn_info.assist_cb = NULL;
1015         card->osn_info.data_cb = NULL;
1016         return;
1017 }
1018 EXPORT_SYMBOL(qeth_osn_deregister);
1019 #endif
1020
1021 /* SETBRIDGEPORT support, async notifications */
1022
1023 enum qeth_an_event_type {anev_reg_unreg, anev_abort, anev_reset};
1024
1025 /**
1026  * qeth_bridge_emit_host_event() - bridgeport address change notification
1027  * @card:  qeth_card structure pointer, for udev events.
1028  * @evtype:  "normal" register/unregister, or abort, or reset. For abort
1029  *            and reset token and addr_lnid are unused and may be NULL.
1030  * @code:  event bitmask: high order bit 0x80 value 1 means removal of an
1031  *                        object, 0 - addition of an object.
1032  *                        0x01 - VLAN, 0x02 - MAC, 0x03 - VLAN and MAC.
1033  * @token: "network token" structure identifying physical address of the port.
1034  * @addr_lnid: pointer to structure with MAC address and VLAN ID.
1035  *
1036  * This function is called when registrations and deregistrations are
1037  * reported by the hardware, and also when notifications are enabled -
1038  * for all currently registered addresses.
1039  */
1040 static void qeth_bridge_emit_host_event(struct qeth_card *card,
1041                                         enum qeth_an_event_type evtype,
1042                                         u8 code,
1043                                         struct net_if_token *token,
1044                                         struct mac_addr_lnid *addr_lnid)
1045 {
1046         char str[7][32];
1047         char *env[8];
1048         int i = 0;
1049
1050         switch (evtype) {
1051         case anev_reg_unreg:
1052                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=%s",
1053                                 (code & IPA_ADDR_CHANGE_CODE_REMOVAL)
1054                                 ? "deregister" : "register");
1055                 env[i] = str[i]; i++;
1056                 if (code & IPA_ADDR_CHANGE_CODE_VLANID) {
1057                         snprintf(str[i], sizeof(str[i]), "VLAN=%d",
1058                                 addr_lnid->lnid);
1059                         env[i] = str[i]; i++;
1060                 }
1061                 if (code & IPA_ADDR_CHANGE_CODE_MACADDR) {
1062                         snprintf(str[i], sizeof(str[i]), "MAC=%pM",
1063                                 addr_lnid->mac);
1064                         env[i] = str[i]; i++;
1065                 }
1066                 snprintf(str[i], sizeof(str[i]), "NTOK_BUSID=%x.%x.%04x",
1067                         token->cssid, token->ssid, token->devnum);
1068                 env[i] = str[i]; i++;
1069                 snprintf(str[i], sizeof(str[i]), "NTOK_IID=%02x", token->iid);
1070                 env[i] = str[i]; i++;
1071                 snprintf(str[i], sizeof(str[i]), "NTOK_CHPID=%02x",
1072                                 token->chpid);
1073                 env[i] = str[i]; i++;
1074                 snprintf(str[i], sizeof(str[i]), "NTOK_CHID=%04x", token->chid);
1075                 env[i] = str[i]; i++;
1076                 break;
1077         case anev_abort:
1078                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=abort");
1079                 env[i] = str[i]; i++;
1080                 break;
1081         case anev_reset:
1082                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=reset");
1083                 env[i] = str[i]; i++;
1084                 break;
1085         }
1086         env[i] = NULL;
1087         kobject_uevent_env(&card->gdev->dev.kobj, KOBJ_CHANGE, env);
1088 }
1089
1090 struct qeth_bridge_state_data {
1091         struct work_struct worker;
1092         struct qeth_card *card;
1093         struct qeth_sbp_state_change qports;
1094 };
1095
1096 static void qeth_bridge_state_change_worker(struct work_struct *work)
1097 {
1098         struct qeth_bridge_state_data *data =
1099                 container_of(work, struct qeth_bridge_state_data, worker);
1100         /* We are only interested in the first entry - local port */
1101         struct qeth_sbp_port_entry *entry = &data->qports.entry[0];
1102         char env_locrem[32];
1103         char env_role[32];
1104         char env_state[32];
1105         char *env[] = {
1106                 env_locrem,
1107                 env_role,
1108                 env_state,
1109                 NULL
1110         };
1111
1112         /* Role should not change by itself, but if it did, */
1113         /* information from the hardware is authoritative.  */
1114         mutex_lock(&data->card->sbp_lock);
1115         data->card->options.sbp.role = entry->role;
1116         mutex_unlock(&data->card->sbp_lock);
1117
1118         snprintf(env_locrem, sizeof(env_locrem), "BRIDGEPORT=statechange");
1119         snprintf(env_role, sizeof(env_role), "ROLE=%s",
1120                 (entry->role == QETH_SBP_ROLE_NONE) ? "none" :
1121                 (entry->role == QETH_SBP_ROLE_PRIMARY) ? "primary" :
1122                 (entry->role == QETH_SBP_ROLE_SECONDARY) ? "secondary" :
1123                 "<INVALID>");
1124         snprintf(env_state, sizeof(env_state), "STATE=%s",
1125                 (entry->state == QETH_SBP_STATE_INACTIVE) ? "inactive" :
1126                 (entry->state == QETH_SBP_STATE_STANDBY) ? "standby" :
1127                 (entry->state == QETH_SBP_STATE_ACTIVE) ? "active" :
1128                 "<INVALID>");
1129         kobject_uevent_env(&data->card->gdev->dev.kobj,
1130                                 KOBJ_CHANGE, env);
1131         kfree(data);
1132 }
1133
1134 static void qeth_bridge_state_change(struct qeth_card *card,
1135                                         struct qeth_ipa_cmd *cmd)
1136 {
1137         struct qeth_sbp_state_change *qports =
1138                  &cmd->data.sbp.data.state_change;
1139         struct qeth_bridge_state_data *data;
1140         int extrasize;
1141
1142         QETH_CARD_TEXT(card, 2, "brstchng");
1143         if (qports->num_entries == 0) {
1144                 QETH_CARD_TEXT(card, 2, "BPempty");
1145                 return;
1146         }
1147         if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1148                 QETH_CARD_TEXT_(card, 2, "BPsz%04x", qports->entry_length);
1149                 return;
1150         }
1151         extrasize = sizeof(struct qeth_sbp_port_entry) * qports->num_entries;
1152         data = kzalloc(sizeof(struct qeth_bridge_state_data) + extrasize,
1153                 GFP_ATOMIC);
1154         if (!data) {
1155                 QETH_CARD_TEXT(card, 2, "BPSalloc");
1156                 return;
1157         }
1158         INIT_WORK(&data->worker, qeth_bridge_state_change_worker);
1159         data->card = card;
1160         memcpy(&data->qports, qports,
1161                         sizeof(struct qeth_sbp_state_change) + extrasize);
1162         queue_work(card->event_wq, &data->worker);
1163 }
1164
1165 struct qeth_addr_change_data {
1166         struct work_struct worker;
1167         struct qeth_card *card;
1168         struct qeth_ipacmd_addr_change ac_event;
1169 };
1170
1171 static void qeth_addr_change_event_worker(struct work_struct *work)
1172 {
1173         struct qeth_addr_change_data *data =
1174                 container_of(work, struct qeth_addr_change_data, worker);
1175         int i;
1176
1177         QETH_CARD_TEXT(data->card, 4, "adrchgew");
1178         if (data->ac_event.lost_event_mask) {
1179                 dev_info(&data->card->gdev->dev,
1180                          "Address change notification stopped on %s (%s)\n",
1181                          data->card->dev->name,
1182                         (data->ac_event.lost_event_mask == 0x01)
1183                         ? "Overflow"
1184                         : (data->ac_event.lost_event_mask == 0x02)
1185                         ? "Bridge port state change"
1186                         : "Unknown reason");
1187                 mutex_lock(&data->card->sbp_lock);
1188                 data->card->options.sbp.hostnotification = 0;
1189                 mutex_unlock(&data->card->sbp_lock);
1190                 qeth_bridge_emit_host_event(data->card, anev_abort,
1191                                             0, NULL, NULL);
1192         } else
1193                 for (i = 0; i < data->ac_event.num_entries; i++) {
1194                         struct qeth_ipacmd_addr_change_entry *entry =
1195                                         &data->ac_event.entry[i];
1196                         qeth_bridge_emit_host_event(data->card,
1197                                                     anev_reg_unreg,
1198                                                     entry->change_code,
1199                                                     &entry->token,
1200                                                     &entry->addr_lnid);
1201                 }
1202         kfree(data);
1203 }
1204
1205 static void qeth_addr_change_event(struct qeth_card *card,
1206                                    struct qeth_ipa_cmd *cmd)
1207 {
1208         struct qeth_ipacmd_addr_change *hostevs =
1209                  &cmd->data.addrchange;
1210         struct qeth_addr_change_data *data;
1211         int extrasize;
1212
1213         QETH_CARD_TEXT(card, 4, "adrchgev");
1214         if (cmd->hdr.return_code != 0x0000) {
1215                 if (cmd->hdr.return_code == 0x0010) {
1216                         if (hostevs->lost_event_mask == 0x00)
1217                                 hostevs->lost_event_mask = 0xff;
1218                 } else {
1219                         QETH_CARD_TEXT_(card, 2, "ACHN%04x",
1220                                 cmd->hdr.return_code);
1221                         return;
1222                 }
1223         }
1224         extrasize = sizeof(struct qeth_ipacmd_addr_change_entry) *
1225                                                 hostevs->num_entries;
1226         data = kzalloc(sizeof(struct qeth_addr_change_data) + extrasize,
1227                        GFP_ATOMIC);
1228         if (!data) {
1229                 QETH_CARD_TEXT(card, 2, "ACNalloc");
1230                 return;
1231         }
1232         INIT_WORK(&data->worker, qeth_addr_change_event_worker);
1233         data->card = card;
1234         memcpy(&data->ac_event, hostevs,
1235                         sizeof(struct qeth_ipacmd_addr_change) + extrasize);
1236         queue_work(card->event_wq, &data->worker);
1237 }
1238
1239 /* SETBRIDGEPORT support; sending commands */
1240
1241 struct _qeth_sbp_cbctl {
1242         union {
1243                 u32 supported;
1244                 struct {
1245                         enum qeth_sbp_roles *role;
1246                         enum qeth_sbp_states *state;
1247                 } qports;
1248         } data;
1249 };
1250
1251 static int qeth_bridgeport_makerc(struct qeth_card *card,
1252                                   struct qeth_ipa_cmd *cmd)
1253 {
1254         struct qeth_ipacmd_setbridgeport *sbp = &cmd->data.sbp;
1255         enum qeth_ipa_sbp_cmd setcmd = sbp->hdr.command_code;
1256         u16 ipa_rc = cmd->hdr.return_code;
1257         u16 sbp_rc = sbp->hdr.return_code;
1258         int rc;
1259
1260         if (ipa_rc == IPA_RC_SUCCESS && sbp_rc == IPA_RC_SUCCESS)
1261                 return 0;
1262
1263         if ((IS_IQD(card) && ipa_rc == IPA_RC_SUCCESS) ||
1264             (!IS_IQD(card) && ipa_rc == sbp_rc)) {
1265                 switch (sbp_rc) {
1266                 case IPA_RC_SUCCESS:
1267                         rc = 0;
1268                         break;
1269                 case IPA_RC_L2_UNSUPPORTED_CMD:
1270                 case IPA_RC_UNSUPPORTED_COMMAND:
1271                         rc = -EOPNOTSUPP;
1272                         break;
1273                 case IPA_RC_SBP_OSA_NOT_CONFIGURED:
1274                 case IPA_RC_SBP_IQD_NOT_CONFIGURED:
1275                         rc = -ENODEV; /* maybe not the best code here? */
1276                         dev_err(&card->gdev->dev,
1277         "The device is not configured as a Bridge Port\n");
1278                         break;
1279                 case IPA_RC_SBP_OSA_OS_MISMATCH:
1280                 case IPA_RC_SBP_IQD_OS_MISMATCH:
1281                         rc = -EPERM;
1282                         dev_err(&card->gdev->dev,
1283         "A Bridge Port is already configured by a different operating system\n");
1284                         break;
1285                 case IPA_RC_SBP_OSA_ANO_DEV_PRIMARY:
1286                 case IPA_RC_SBP_IQD_ANO_DEV_PRIMARY:
1287                         switch (setcmd) {
1288                         case IPA_SBP_SET_PRIMARY_BRIDGE_PORT:
1289                                 rc = -EEXIST;
1290                                 dev_err(&card->gdev->dev,
1291         "The LAN already has a primary Bridge Port\n");
1292                                 break;
1293                         case IPA_SBP_SET_SECONDARY_BRIDGE_PORT:
1294                                 rc = -EBUSY;
1295                                 dev_err(&card->gdev->dev,
1296         "The device is already a primary Bridge Port\n");
1297                                 break;
1298                         default:
1299                                 rc = -EIO;
1300                         }
1301                         break;
1302                 case IPA_RC_SBP_OSA_CURRENT_SECOND:
1303                 case IPA_RC_SBP_IQD_CURRENT_SECOND:
1304                         rc = -EBUSY;
1305                         dev_err(&card->gdev->dev,
1306         "The device is already a secondary Bridge Port\n");
1307                         break;
1308                 case IPA_RC_SBP_OSA_LIMIT_SECOND:
1309                 case IPA_RC_SBP_IQD_LIMIT_SECOND:
1310                         rc = -EEXIST;
1311                         dev_err(&card->gdev->dev,
1312         "The LAN cannot have more secondary Bridge Ports\n");
1313                         break;
1314                 case IPA_RC_SBP_OSA_CURRENT_PRIMARY:
1315                 case IPA_RC_SBP_IQD_CURRENT_PRIMARY:
1316                         rc = -EBUSY;
1317                         dev_err(&card->gdev->dev,
1318         "The device is already a primary Bridge Port\n");
1319                         break;
1320                 case IPA_RC_SBP_OSA_NOT_AUTHD_BY_ZMAN:
1321                 case IPA_RC_SBP_IQD_NOT_AUTHD_BY_ZMAN:
1322                         rc = -EACCES;
1323                         dev_err(&card->gdev->dev,
1324         "The device is not authorized to be a Bridge Port\n");
1325                         break;
1326                 default:
1327                         rc = -EIO;
1328                 }
1329         } else {
1330                 switch (ipa_rc) {
1331                 case IPA_RC_NOTSUPP:
1332                         rc = -EOPNOTSUPP;
1333                         break;
1334                 case IPA_RC_UNSUPPORTED_COMMAND:
1335                         rc = -EOPNOTSUPP;
1336                         break;
1337                 default:
1338                         rc = -EIO;
1339                 }
1340         }
1341
1342         if (rc) {
1343                 QETH_CARD_TEXT_(card, 2, "SBPi%04x", ipa_rc);
1344                 QETH_CARD_TEXT_(card, 2, "SBPc%04x", sbp_rc);
1345         }
1346         return rc;
1347 }
1348
1349 static struct qeth_cmd_buffer *qeth_sbp_build_cmd(struct qeth_card *card,
1350                                                   enum qeth_ipa_sbp_cmd sbp_cmd,
1351                                                   unsigned int data_length)
1352 {
1353         enum qeth_ipa_cmds ipa_cmd = IS_IQD(card) ? IPA_CMD_SETBRIDGEPORT_IQD :
1354                                                     IPA_CMD_SETBRIDGEPORT_OSA;
1355         struct qeth_ipacmd_sbp_hdr *hdr;
1356         struct qeth_cmd_buffer *iob;
1357
1358         iob = qeth_ipa_alloc_cmd(card, ipa_cmd, QETH_PROT_NONE,
1359                                  data_length +
1360                                  offsetof(struct qeth_ipacmd_setbridgeport,
1361                                           data));
1362         if (!iob)
1363                 return iob;
1364
1365         hdr = &__ipa_cmd(iob)->data.sbp.hdr;
1366         hdr->cmdlength = sizeof(*hdr) + data_length;
1367         hdr->command_code = sbp_cmd;
1368         hdr->used_total = 1;
1369         hdr->seq_no = 1;
1370         return iob;
1371 }
1372
1373 static int qeth_bridgeport_query_support_cb(struct qeth_card *card,
1374         struct qeth_reply *reply, unsigned long data)
1375 {
1376         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1377         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1378         int rc;
1379
1380         QETH_CARD_TEXT(card, 2, "brqsupcb");
1381         rc = qeth_bridgeport_makerc(card, cmd);
1382         if (rc)
1383                 return rc;
1384
1385         cbctl->data.supported =
1386                 cmd->data.sbp.data.query_cmds_supp.supported_cmds;
1387         return 0;
1388 }
1389
1390 /**
1391  * qeth_bridgeport_query_support() - store bitmask of supported subfunctions.
1392  * @card:                            qeth_card structure pointer.
1393  *
1394  * Sets bitmask of supported setbridgeport subfunctions in the qeth_card
1395  * strucutre: card->options.sbp.supported_funcs.
1396  */
1397 static void qeth_bridgeport_query_support(struct qeth_card *card)
1398 {
1399         struct qeth_cmd_buffer *iob;
1400         struct _qeth_sbp_cbctl cbctl;
1401
1402         QETH_CARD_TEXT(card, 2, "brqsuppo");
1403         iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_COMMANDS_SUPPORTED,
1404                                  SBP_DATA_SIZEOF(query_cmds_supp));
1405         if (!iob)
1406                 return;
1407
1408         if (qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_support_cb,
1409                               &cbctl)) {
1410                 card->options.sbp.role = QETH_SBP_ROLE_NONE;
1411                 card->options.sbp.supported_funcs = 0;
1412                 return;
1413         }
1414         card->options.sbp.supported_funcs = cbctl.data.supported;
1415 }
1416
1417 static int qeth_bridgeport_query_ports_cb(struct qeth_card *card,
1418         struct qeth_reply *reply, unsigned long data)
1419 {
1420         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1421         struct qeth_sbp_query_ports *qports = &cmd->data.sbp.data.query_ports;
1422         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1423         int rc;
1424
1425         QETH_CARD_TEXT(card, 2, "brqprtcb");
1426         rc = qeth_bridgeport_makerc(card, cmd);
1427         if (rc)
1428                 return rc;
1429
1430         if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1431                 QETH_CARD_TEXT_(card, 2, "SBPs%04x", qports->entry_length);
1432                 return -EINVAL;
1433         }
1434         /* first entry contains the state of the local port */
1435         if (qports->num_entries > 0) {
1436                 if (cbctl->data.qports.role)
1437                         *cbctl->data.qports.role = qports->entry[0].role;
1438                 if (cbctl->data.qports.state)
1439                         *cbctl->data.qports.state = qports->entry[0].state;
1440         }
1441         return 0;
1442 }
1443
1444 /**
1445  * qeth_bridgeport_query_ports() - query local bridgeport status.
1446  * @card:                          qeth_card structure pointer.
1447  * @role:   Role of the port: 0-none, 1-primary, 2-secondary.
1448  * @state:  State of the port: 0-inactive, 1-standby, 2-active.
1449  *
1450  * Returns negative errno-compatible error indication or 0 on success.
1451  *
1452  * 'role' and 'state' are not updated in case of hardware operation failure.
1453  */
1454 int qeth_bridgeport_query_ports(struct qeth_card *card,
1455         enum qeth_sbp_roles *role, enum qeth_sbp_states *state)
1456 {
1457         struct qeth_cmd_buffer *iob;
1458         struct _qeth_sbp_cbctl cbctl = {
1459                 .data = {
1460                         .qports = {
1461                                 .role = role,
1462                                 .state = state,
1463                         },
1464                 },
1465         };
1466
1467         QETH_CARD_TEXT(card, 2, "brqports");
1468         if (!(card->options.sbp.supported_funcs & IPA_SBP_QUERY_BRIDGE_PORTS))
1469                 return -EOPNOTSUPP;
1470         iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_BRIDGE_PORTS, 0);
1471         if (!iob)
1472                 return -ENOMEM;
1473
1474         return qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_ports_cb,
1475                                  &cbctl);
1476 }
1477
1478 static int qeth_bridgeport_set_cb(struct qeth_card *card,
1479         struct qeth_reply *reply, unsigned long data)
1480 {
1481         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
1482
1483         QETH_CARD_TEXT(card, 2, "brsetrcb");
1484         return qeth_bridgeport_makerc(card, cmd);
1485 }
1486
1487 /**
1488  * qeth_bridgeport_setrole() - Assign primary role to the port.
1489  * @card:                      qeth_card structure pointer.
1490  * @role:                      Role to assign.
1491  *
1492  * Returns negative errno-compatible error indication or 0 on success.
1493  */
1494 int qeth_bridgeport_setrole(struct qeth_card *card, enum qeth_sbp_roles role)
1495 {
1496         struct qeth_cmd_buffer *iob;
1497         enum qeth_ipa_sbp_cmd setcmd;
1498         unsigned int cmdlength = 0;
1499
1500         QETH_CARD_TEXT(card, 2, "brsetrol");
1501         switch (role) {
1502         case QETH_SBP_ROLE_NONE:
1503                 setcmd = IPA_SBP_RESET_BRIDGE_PORT_ROLE;
1504                 break;
1505         case QETH_SBP_ROLE_PRIMARY:
1506                 setcmd = IPA_SBP_SET_PRIMARY_BRIDGE_PORT;
1507                 cmdlength = SBP_DATA_SIZEOF(set_primary);
1508                 break;
1509         case QETH_SBP_ROLE_SECONDARY:
1510                 setcmd = IPA_SBP_SET_SECONDARY_BRIDGE_PORT;
1511                 break;
1512         default:
1513                 return -EINVAL;
1514         }
1515         if (!(card->options.sbp.supported_funcs & setcmd))
1516                 return -EOPNOTSUPP;
1517         iob = qeth_sbp_build_cmd(card, setcmd, cmdlength);
1518         if (!iob)
1519                 return -ENOMEM;
1520
1521         return qeth_send_ipa_cmd(card, iob, qeth_bridgeport_set_cb, NULL);
1522 }
1523
1524 static void qeth_bridgeport_an_set_cb(void *priv,
1525                                       struct chsc_pnso_naid_l2 *entry)
1526 {
1527         struct qeth_card *card = (struct qeth_card *)priv;
1528         u8 code;
1529
1530         code = IPA_ADDR_CHANGE_CODE_MACADDR;
1531         if (entry->addr_lnid.lnid < VLAN_N_VID)
1532                 code |= IPA_ADDR_CHANGE_CODE_VLANID;
1533         qeth_bridge_emit_host_event(card, anev_reg_unreg, code,
1534                                     (struct net_if_token *)&entry->nit,
1535                                     (struct mac_addr_lnid *)&entry->addr_lnid);
1536 }
1537
1538 /**
1539  * qeth_bridgeport_an_set() - Enable or disable bridgeport address notification
1540  * @card:                     qeth_card structure pointer.
1541  * @enable:                   0 - disable, non-zero - enable notifications
1542  *
1543  * Returns negative errno-compatible error indication or 0 on success.
1544  *
1545  * On enable, emits a series of address notifications udev events for all
1546  * currently registered hosts.
1547  */
1548 int qeth_bridgeport_an_set(struct qeth_card *card, int enable)
1549 {
1550         int rc;
1551
1552         if (!card->options.sbp.supported_funcs)
1553                 return -EOPNOTSUPP;
1554
1555         if (enable) {
1556                 qeth_bridge_emit_host_event(card, anev_reset, 0, NULL, NULL);
1557                 rc = qeth_l2_pnso(card, 1, qeth_bridgeport_an_set_cb, card);
1558         } else
1559                 rc = qeth_l2_pnso(card, 0, NULL, NULL);
1560         return rc;
1561 }
1562
1563 static bool qeth_bridgeport_is_in_use(struct qeth_card *card)
1564 {
1565         return (card->options.sbp.role || card->options.sbp.reflect_promisc ||
1566                 card->options.sbp.hostnotification);
1567 }
1568
1569 /* VNIC Characteristics support */
1570
1571 /* handle VNICC IPA command return codes; convert to error codes */
1572 static int qeth_l2_vnicc_makerc(struct qeth_card *card, u16 ipa_rc)
1573 {
1574         int rc;
1575
1576         switch (ipa_rc) {
1577         case IPA_RC_SUCCESS:
1578                 return ipa_rc;
1579         case IPA_RC_L2_UNSUPPORTED_CMD:
1580         case IPA_RC_NOTSUPP:
1581                 rc = -EOPNOTSUPP;
1582                 break;
1583         case IPA_RC_VNICC_OOSEQ:
1584                 rc = -EALREADY;
1585                 break;
1586         case IPA_RC_VNICC_VNICBP:
1587                 rc = -EBUSY;
1588                 break;
1589         case IPA_RC_L2_ADDR_TABLE_FULL:
1590                 rc = -ENOSPC;
1591                 break;
1592         case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
1593                 rc = -EACCES;
1594                 break;
1595         default:
1596                 rc = -EIO;
1597         }
1598
1599         QETH_CARD_TEXT_(card, 2, "err%04x", ipa_rc);
1600         return rc;
1601 }
1602
1603 /* generic VNICC request call back */
1604 static int qeth_l2_vnicc_request_cb(struct qeth_card *card,
1605                                     struct qeth_reply *reply,
1606                                     unsigned long data)
1607 {
1608         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1609         struct qeth_ipacmd_vnicc *rep = &cmd->data.vnicc;
1610         u32 sub_cmd = cmd->data.vnicc.hdr.sub_command;
1611
1612         QETH_CARD_TEXT(card, 2, "vniccrcb");
1613         if (cmd->hdr.return_code)
1614                 return qeth_l2_vnicc_makerc(card, cmd->hdr.return_code);
1615         /* return results to caller */
1616         card->options.vnicc.sup_chars = rep->vnicc_cmds.supported;
1617         card->options.vnicc.cur_chars = rep->vnicc_cmds.enabled;
1618
1619         if (sub_cmd == IPA_VNICC_QUERY_CMDS)
1620                 *(u32 *)reply->param = rep->data.query_cmds.sup_cmds;
1621         else if (sub_cmd == IPA_VNICC_GET_TIMEOUT)
1622                 *(u32 *)reply->param = rep->data.getset_timeout.timeout;
1623
1624         return 0;
1625 }
1626
1627 static struct qeth_cmd_buffer *qeth_l2_vnicc_build_cmd(struct qeth_card *card,
1628                                                        u32 vnicc_cmd,
1629                                                        unsigned int data_length)
1630 {
1631         struct qeth_ipacmd_vnicc_hdr *hdr;
1632         struct qeth_cmd_buffer *iob;
1633
1634         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_VNICC, QETH_PROT_NONE,
1635                                  data_length +
1636                                  offsetof(struct qeth_ipacmd_vnicc, data));
1637         if (!iob)
1638                 return NULL;
1639
1640         hdr = &__ipa_cmd(iob)->data.vnicc.hdr;
1641         hdr->data_length = sizeof(*hdr) + data_length;
1642         hdr->sub_command = vnicc_cmd;
1643         return iob;
1644 }
1645
1646 /* VNICC query VNIC characteristics request */
1647 static int qeth_l2_vnicc_query_chars(struct qeth_card *card)
1648 {
1649         struct qeth_cmd_buffer *iob;
1650
1651         QETH_CARD_TEXT(card, 2, "vniccqch");
1652         iob = qeth_l2_vnicc_build_cmd(card, IPA_VNICC_QUERY_CHARS, 0);
1653         if (!iob)
1654                 return -ENOMEM;
1655
1656         return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, NULL);
1657 }
1658
1659 /* VNICC query sub commands request */
1660 static int qeth_l2_vnicc_query_cmds(struct qeth_card *card, u32 vnic_char,
1661                                     u32 *sup_cmds)
1662 {
1663         struct qeth_cmd_buffer *iob;
1664
1665         QETH_CARD_TEXT(card, 2, "vniccqcm");
1666         iob = qeth_l2_vnicc_build_cmd(card, IPA_VNICC_QUERY_CMDS,
1667                                       VNICC_DATA_SIZEOF(query_cmds));
1668         if (!iob)
1669                 return -ENOMEM;
1670
1671         __ipa_cmd(iob)->data.vnicc.data.query_cmds.vnic_char = vnic_char;
1672
1673         return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, sup_cmds);
1674 }
1675
1676 /* VNICC enable/disable characteristic request */
1677 static int qeth_l2_vnicc_set_char(struct qeth_card *card, u32 vnic_char,
1678                                       u32 cmd)
1679 {
1680         struct qeth_cmd_buffer *iob;
1681
1682         QETH_CARD_TEXT(card, 2, "vniccedc");
1683         iob = qeth_l2_vnicc_build_cmd(card, cmd, VNICC_DATA_SIZEOF(set_char));
1684         if (!iob)
1685                 return -ENOMEM;
1686
1687         __ipa_cmd(iob)->data.vnicc.data.set_char.vnic_char = vnic_char;
1688
1689         return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, NULL);
1690 }
1691
1692 /* VNICC get/set timeout for characteristic request */
1693 static int qeth_l2_vnicc_getset_timeout(struct qeth_card *card, u32 vnicc,
1694                                         u32 cmd, u32 *timeout)
1695 {
1696         struct qeth_vnicc_getset_timeout *getset_timeout;
1697         struct qeth_cmd_buffer *iob;
1698
1699         QETH_CARD_TEXT(card, 2, "vniccgst");
1700         iob = qeth_l2_vnicc_build_cmd(card, cmd,
1701                                       VNICC_DATA_SIZEOF(getset_timeout));
1702         if (!iob)
1703                 return -ENOMEM;
1704
1705         getset_timeout = &__ipa_cmd(iob)->data.vnicc.data.getset_timeout;
1706         getset_timeout->vnic_char = vnicc;
1707
1708         if (cmd == IPA_VNICC_SET_TIMEOUT)
1709                 getset_timeout->timeout = *timeout;
1710
1711         return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, timeout);
1712 }
1713
1714 /* set current VNICC flag state; called from sysfs store function */
1715 int qeth_l2_vnicc_set_state(struct qeth_card *card, u32 vnicc, bool state)
1716 {
1717         int rc = 0;
1718         u32 cmd;
1719
1720         QETH_CARD_TEXT(card, 2, "vniccsch");
1721
1722         /* check if characteristic and enable/disable are supported */
1723         if (!(card->options.vnicc.sup_chars & vnicc) ||
1724             !(card->options.vnicc.set_char_sup & vnicc))
1725                 return -EOPNOTSUPP;
1726
1727         if (qeth_bridgeport_is_in_use(card))
1728                 return -EBUSY;
1729
1730         /* set enable/disable command and store wanted characteristic */
1731         if (state) {
1732                 cmd = IPA_VNICC_ENABLE;
1733                 card->options.vnicc.wanted_chars |= vnicc;
1734         } else {
1735                 cmd = IPA_VNICC_DISABLE;
1736                 card->options.vnicc.wanted_chars &= ~vnicc;
1737         }
1738
1739         /* do we need to do anything? */
1740         if (card->options.vnicc.cur_chars == card->options.vnicc.wanted_chars)
1741                 return rc;
1742
1743         /* if card is not ready, simply stop here */
1744         if (!qeth_card_hw_is_reachable(card)) {
1745                 if (state)
1746                         card->options.vnicc.cur_chars |= vnicc;
1747                 else
1748                         card->options.vnicc.cur_chars &= ~vnicc;
1749                 return rc;
1750         }
1751
1752         rc = qeth_l2_vnicc_set_char(card, vnicc, cmd);
1753         if (rc)
1754                 card->options.vnicc.wanted_chars =
1755                         card->options.vnicc.cur_chars;
1756         else {
1757                 /* successful online VNICC change; handle special cases */
1758                 if (state && vnicc == QETH_VNICC_RX_BCAST)
1759                         card->options.vnicc.rx_bcast_enabled = true;
1760                 if (!state && vnicc == QETH_VNICC_LEARNING)
1761                         qeth_l2_vnicc_recover_timeout(card, vnicc,
1762                                         &card->options.vnicc.learning_timeout);
1763         }
1764
1765         return rc;
1766 }
1767
1768 /* get current VNICC flag state; called from sysfs show function */
1769 int qeth_l2_vnicc_get_state(struct qeth_card *card, u32 vnicc, bool *state)
1770 {
1771         int rc = 0;
1772
1773         QETH_CARD_TEXT(card, 2, "vniccgch");
1774
1775         /* check if characteristic is supported */
1776         if (!(card->options.vnicc.sup_chars & vnicc))
1777                 return -EOPNOTSUPP;
1778
1779         if (qeth_bridgeport_is_in_use(card))
1780                 return -EBUSY;
1781
1782         /* if card is ready, query current VNICC state */
1783         if (qeth_card_hw_is_reachable(card))
1784                 rc = qeth_l2_vnicc_query_chars(card);
1785
1786         *state = (card->options.vnicc.cur_chars & vnicc) ? true : false;
1787         return rc;
1788 }
1789
1790 /* set VNICC timeout; called from sysfs store function. Currently, only learning
1791  * supports timeout
1792  */
1793 int qeth_l2_vnicc_set_timeout(struct qeth_card *card, u32 timeout)
1794 {
1795         int rc = 0;
1796
1797         QETH_CARD_TEXT(card, 2, "vniccsto");
1798
1799         /* check if characteristic and set_timeout are supported */
1800         if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
1801             !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
1802                 return -EOPNOTSUPP;
1803
1804         if (qeth_bridgeport_is_in_use(card))
1805                 return -EBUSY;
1806
1807         /* do we need to do anything? */
1808         if (card->options.vnicc.learning_timeout == timeout)
1809                 return rc;
1810
1811         /* if card is not ready, simply store the value internally and return */
1812         if (!qeth_card_hw_is_reachable(card)) {
1813                 card->options.vnicc.learning_timeout = timeout;
1814                 return rc;
1815         }
1816
1817         /* send timeout value to card; if successful, store value internally */
1818         rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
1819                                           IPA_VNICC_SET_TIMEOUT, &timeout);
1820         if (!rc)
1821                 card->options.vnicc.learning_timeout = timeout;
1822
1823         return rc;
1824 }
1825
1826 /* get current VNICC timeout; called from sysfs show function. Currently, only
1827  * learning supports timeout
1828  */
1829 int qeth_l2_vnicc_get_timeout(struct qeth_card *card, u32 *timeout)
1830 {
1831         int rc = 0;
1832
1833         QETH_CARD_TEXT(card, 2, "vniccgto");
1834
1835         /* check if characteristic and get_timeout are supported */
1836         if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
1837             !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
1838                 return -EOPNOTSUPP;
1839
1840         if (qeth_bridgeport_is_in_use(card))
1841                 return -EBUSY;
1842
1843         /* if card is ready, get timeout. Otherwise, just return stored value */
1844         *timeout = card->options.vnicc.learning_timeout;
1845         if (qeth_card_hw_is_reachable(card))
1846                 rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
1847                                                   IPA_VNICC_GET_TIMEOUT,
1848                                                   timeout);
1849
1850         return rc;
1851 }
1852
1853 /* check if VNICC is currently enabled */
1854 bool qeth_l2_vnicc_is_in_use(struct qeth_card *card)
1855 {
1856         if (!card->options.vnicc.sup_chars)
1857                 return false;
1858         /* default values are only OK if rx_bcast was not enabled by user
1859          * or the card is offline.
1860          */
1861         if (card->options.vnicc.cur_chars == QETH_VNICC_DEFAULT) {
1862                 if (!card->options.vnicc.rx_bcast_enabled ||
1863                     !qeth_card_hw_is_reachable(card))
1864                         return false;
1865         }
1866         return true;
1867 }
1868
1869 /* recover user timeout setting */
1870 static bool qeth_l2_vnicc_recover_timeout(struct qeth_card *card, u32 vnicc,
1871                                           u32 *timeout)
1872 {
1873         if (card->options.vnicc.sup_chars & vnicc &&
1874             card->options.vnicc.getset_timeout_sup & vnicc &&
1875             !qeth_l2_vnicc_getset_timeout(card, vnicc, IPA_VNICC_SET_TIMEOUT,
1876                                           timeout))
1877                 return false;
1878         *timeout = QETH_VNICC_DEFAULT_TIMEOUT;
1879         return true;
1880 }
1881
1882 /* recover user characteristic setting */
1883 static bool qeth_l2_vnicc_recover_char(struct qeth_card *card, u32 vnicc,
1884                                        bool enable)
1885 {
1886         u32 cmd = enable ? IPA_VNICC_ENABLE : IPA_VNICC_DISABLE;
1887
1888         if (card->options.vnicc.sup_chars & vnicc &&
1889             card->options.vnicc.set_char_sup & vnicc &&
1890             !qeth_l2_vnicc_set_char(card, vnicc, cmd))
1891                 return false;
1892         card->options.vnicc.wanted_chars &= ~vnicc;
1893         card->options.vnicc.wanted_chars |= QETH_VNICC_DEFAULT & vnicc;
1894         return true;
1895 }
1896
1897 /* (re-)initialize VNICC */
1898 static void qeth_l2_vnicc_init(struct qeth_card *card)
1899 {
1900         u32 *timeout = &card->options.vnicc.learning_timeout;
1901         bool enable, error = false;
1902         unsigned int chars_len, i;
1903         unsigned long chars_tmp;
1904         u32 sup_cmds, vnicc;
1905
1906         QETH_CARD_TEXT(card, 2, "vniccini");
1907         /* reset rx_bcast */
1908         card->options.vnicc.rx_bcast_enabled = 0;
1909         /* initial query and storage of VNIC characteristics */
1910         if (qeth_l2_vnicc_query_chars(card)) {
1911                 if (card->options.vnicc.wanted_chars != QETH_VNICC_DEFAULT ||
1912                     *timeout != QETH_VNICC_DEFAULT_TIMEOUT)
1913                         dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
1914                 /* fail quietly if user didn't change the default config */
1915                 card->options.vnicc.sup_chars = 0;
1916                 card->options.vnicc.cur_chars = 0;
1917                 card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
1918                 return;
1919         }
1920         /* get supported commands for each supported characteristic */
1921         chars_tmp = card->options.vnicc.sup_chars;
1922         chars_len = sizeof(card->options.vnicc.sup_chars) * BITS_PER_BYTE;
1923         for_each_set_bit(i, &chars_tmp, chars_len) {
1924                 vnicc = BIT(i);
1925                 if (qeth_l2_vnicc_query_cmds(card, vnicc, &sup_cmds)) {
1926                         sup_cmds = 0;
1927                         error = true;
1928                 }
1929                 if ((sup_cmds & IPA_VNICC_SET_TIMEOUT) &&
1930                     (sup_cmds & IPA_VNICC_GET_TIMEOUT))
1931                         card->options.vnicc.getset_timeout_sup |= vnicc;
1932                 else
1933                         card->options.vnicc.getset_timeout_sup &= ~vnicc;
1934                 if ((sup_cmds & IPA_VNICC_ENABLE) &&
1935                     (sup_cmds & IPA_VNICC_DISABLE))
1936                         card->options.vnicc.set_char_sup |= vnicc;
1937                 else
1938                         card->options.vnicc.set_char_sup &= ~vnicc;
1939         }
1940         /* enforce assumed default values and recover settings, if changed  */
1941         error |= qeth_l2_vnicc_recover_timeout(card, QETH_VNICC_LEARNING,
1942                                                timeout);
1943         /* Change chars, if necessary  */
1944         chars_tmp = card->options.vnicc.wanted_chars ^
1945                     card->options.vnicc.cur_chars;
1946         chars_len = sizeof(card->options.vnicc.wanted_chars) * BITS_PER_BYTE;
1947         for_each_set_bit(i, &chars_tmp, chars_len) {
1948                 vnicc = BIT(i);
1949                 enable = card->options.vnicc.wanted_chars & vnicc;
1950                 error |= qeth_l2_vnicc_recover_char(card, vnicc, enable);
1951         }
1952         if (error)
1953                 dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
1954 }
1955
1956 /* configure default values of VNIC characteristics */
1957 static void qeth_l2_vnicc_set_defaults(struct qeth_card *card)
1958 {
1959         /* characteristics values */
1960         card->options.vnicc.sup_chars = QETH_VNICC_ALL;
1961         card->options.vnicc.cur_chars = QETH_VNICC_DEFAULT;
1962         card->options.vnicc.learning_timeout = QETH_VNICC_DEFAULT_TIMEOUT;
1963         /* supported commands */
1964         card->options.vnicc.set_char_sup = QETH_VNICC_ALL;
1965         card->options.vnicc.getset_timeout_sup = QETH_VNICC_LEARNING;
1966         /* settings wanted by users */
1967         card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
1968 }
1969
1970 module_init(qeth_l2_init);
1971 module_exit(qeth_l2_exit);
1972 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1973 MODULE_DESCRIPTION("qeth layer 2 discipline");
1974 MODULE_LICENSE("GPL");