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 int qeth_l2_set_offline(struct ccwgroup_device *);
  28 static int qeth_l2_stop(struct net_device *);
  29 static void qeth_bridgeport_query_support(struct qeth_card *card);
  30 static void qeth_bridge_state_change(struct qeth_card *card,
  31                                         struct qeth_ipa_cmd *cmd);
  32 static void qeth_bridge_host_event(struct qeth_card *card,
  33                                         struct qeth_ipa_cmd *cmd);
  34 static void qeth_l2_vnicc_set_defaults(struct qeth_card *card);
  35 static void qeth_l2_vnicc_init(struct qeth_card *card);
  36 static bool qeth_l2_vnicc_recover_timeout(struct qeth_card *card, u32 vnicc,
  37                                           u32 *timeout);
  38
  39 static struct net_device *qeth_l2_netdev_by_devno(unsigned char *read_dev_no)
  40 {
  41         struct qeth_card *card;
  42         struct net_device *ndev;
  43         __u16 temp_dev_no;
  44         unsigned long flags;
  45         struct ccw_dev_id read_devid;
  46
  47         ndev = NULL;
  48         memcpy(&temp_dev_no, read_dev_no, 2);
  49         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
  50         list_for_each_entry(card, &qeth_core_card_list.list, list) {
  51                 ccw_device_get_id(CARD_RDEV(card), &read_devid);
  52                 if (read_devid.devno == temp_dev_no) {
  53                         ndev = card->dev;
  54                         break;
  55                 }
  56         }
  57         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
  58         return ndev;
  59 }
  60
  61 static int qeth_setdelmac_makerc(struct qeth_card *card, int retcode)
  62 {
  63         int rc;
  64
  65         if (retcode)
  66                 QETH_CARD_TEXT_(card, 2, "err%04x", retcode);
  67         switch (retcode) {
  68         case IPA_RC_SUCCESS:
  69                 rc = 0;
  70                 break;
  71         case IPA_RC_L2_UNSUPPORTED_CMD:
  72                 rc = -EOPNOTSUPP;
  73                 break;
  74         case IPA_RC_L2_ADDR_TABLE_FULL:
  75                 rc = -ENOSPC;
  76                 break;
  77         case IPA_RC_L2_DUP_MAC:
  78         case IPA_RC_L2_DUP_LAYER3_MAC:
  79                 rc = -EEXIST;
  80                 break;
  81         case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
  82         case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
  83                 rc = -EPERM;
  84                 break;
  85         case IPA_RC_L2_MAC_NOT_FOUND:
  86                 rc = -ENOENT;
  87                 break;
  88         case -ENOMEM:
  89                 rc = -ENOMEM;
  90                 break;
  91         default:
  92                 rc = -EIO;
  93                 break;
  94         }
  95         return rc;
  96 }
  97
  98 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
  99                            enum qeth_ipa_cmds ipacmd)
 100 {
 101         struct qeth_ipa_cmd *cmd;
 102         struct qeth_cmd_buffer *iob;
 103
 104         QETH_CARD_TEXT(card, 2, "L2sdmac");
 105         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 106         if (!iob)
 107                 return -ENOMEM;
 108         cmd = __ipa_cmd(iob);
 109         cmd->data.setdelmac.mac_length = ETH_ALEN;
 110         ether_addr_copy(cmd->data.setdelmac.mac, mac);
 111         return qeth_setdelmac_makerc(card, qeth_send_ipa_cmd(card, iob,
 112                                            NULL, NULL));
 113 }
 114
 115 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
 116 {
 117         int rc;
 118
 119         QETH_CARD_TEXT(card, 2, "L2Setmac");
 120         rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC);
 121         if (rc == 0) {
 122                 dev_info(&card->gdev->dev,
 123                          "MAC address %pM successfully registered on device %s\n",
 124                          mac, card->dev->name);
 125         } else {
 126                 switch (rc) {
 127                 case -EEXIST:
 128                         dev_warn(&card->gdev->dev,
 129                                 "MAC address %pM already exists\n", mac);
 130                         break;
 131                 case -EPERM:
 132                         dev_warn(&card->gdev->dev,
 133                                 "MAC address %pM is not authorized\n", mac);
 134                         break;
 135                 }
 136         }
 137         return rc;
 138 }
 139
 140 static int qeth_l2_write_mac(struct qeth_card *card, u8 *mac)
 141 {
 142         enum qeth_ipa_cmds cmd = is_multicast_ether_addr(mac) ?
 143                                         IPA_CMD_SETGMAC : IPA_CMD_SETVMAC;
 144         int rc;
 145
 146         QETH_CARD_TEXT(card, 2, "L2Wmac");
 147         rc = qeth_l2_send_setdelmac(card, mac, cmd);
 148         if (rc == -EEXIST)
 149                 QETH_DBF_MESSAGE(2, "MAC %pM already registered on %s\n",
 150                                  mac, QETH_CARD_IFNAME(card));
 151         else if (rc)
 152                 QETH_DBF_MESSAGE(2, "Failed to register MAC %pM on %s: %d\n",
 153                                  mac, QETH_CARD_IFNAME(card), rc);
 154         return rc;
 155 }
 156
 157 static int qeth_l2_remove_mac(struct qeth_card *card, u8 *mac)
 158 {
 159         enum qeth_ipa_cmds cmd = is_multicast_ether_addr(mac) ?
 160                                         IPA_CMD_DELGMAC : IPA_CMD_DELVMAC;
 161         int rc;
 162
 163         QETH_CARD_TEXT(card, 2, "L2Rmac");
 164         rc = qeth_l2_send_setdelmac(card, mac, cmd);
 165         if (rc)
 166                 QETH_DBF_MESSAGE(2, "Failed to delete MAC %pM on %s: %d\n",
 167                                  mac, QETH_CARD_IFNAME(card), rc);
 168         return rc;
 169 }
 170
 171 static void qeth_l2_del_all_macs(struct qeth_card *card)
 172 {
 173         struct qeth_mac *mac;
 174         struct hlist_node *tmp;
 175         int i;
 176
 177         spin_lock_bh(&card->mclock);
 178         hash_for_each_safe(card->mac_htable, i, tmp, mac, hnode) {
 179                 hash_del(&mac->hnode);
 180                 kfree(mac);
 181         }
 182         spin_unlock_bh(&card->mclock);
 183 }
 184
 185 static int qeth_l2_get_cast_type(struct qeth_card *card, struct sk_buff *skb)
 186 {
 187         if (card->info.type == QETH_CARD_TYPE_OSN)
 188                 return RTN_UNICAST;
 189         if (is_broadcast_ether_addr(skb->data))
 190                 return RTN_BROADCAST;
 191         if (is_multicast_ether_addr(skb->data))
 192                 return RTN_MULTICAST;
 193         return RTN_UNICAST;
 194 }
 195
 196 static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
 197                                 struct sk_buff *skb, int ipv, int cast_type,
 198                                 unsigned int data_len)
 199 {
 200         struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
 201
 202         hdr->hdr.l2.pkt_length = data_len;
 203
 204         if (skb_is_gso(skb)) {
 205                 hdr->hdr.l2.id = QETH_HEADER_TYPE_L2_TSO;
 206         } else {
 207                 hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
 208                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
 209                         qeth_tx_csum(skb, &hdr->hdr.l2.flags[1], ipv);
 210                         if (card->options.performance_stats)
 211                                 card->perf_stats.tx_csum++;
 212                 }
 213         }
 214
 215         /* set byte byte 3 to casting flags */
 216         if (cast_type == RTN_MULTICAST)
 217                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 218         else if (cast_type == RTN_BROADCAST)
 219                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 220         else
 221                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 222
 223         /* VSWITCH relies on the VLAN
 224          * information to be present in
 225          * the QDIO header */
 226         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
 227                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
 228                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
 229         }
 230 }
 231
 232 static int qeth_setdelvlan_makerc(struct qeth_card *card, int retcode)
 233 {
 234         if (retcode)
 235                 QETH_CARD_TEXT_(card, 2, "err%04x", retcode);
 236
 237         switch (retcode) {
 238         case IPA_RC_SUCCESS:
 239                 return 0;
 240         case IPA_RC_L2_INVALID_VLAN_ID:
 241                 return -EINVAL;
 242         case IPA_RC_L2_DUP_VLAN_ID:
 243                 return -EEXIST;
 244         case IPA_RC_L2_VLAN_ID_NOT_FOUND:
 245                 return -ENOENT;
 246         case IPA_RC_L2_VLAN_ID_NOT_ALLOWED:
 247                 return -EPERM;
 248         case -ENOMEM:
 249                 return -ENOMEM;
 250         default:
 251                 return -EIO;
 252         }
 253 }
 254
 255 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
 256                                       struct qeth_reply *reply,
 257                                       unsigned long data)
 258 {
 259         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
 260
 261         QETH_CARD_TEXT(card, 2, "L2sdvcb");
 262         if (cmd->hdr.return_code) {
 263                 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x.\n",
 264                                  cmd->data.setdelvlan.vlan_id,
 265                                  QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 266                 QETH_CARD_TEXT_(card, 2, "L2VL%4x", cmd->hdr.command);
 267                 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code);
 268         }
 269         return 0;
 270 }
 271
 272 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
 273                                    enum qeth_ipa_cmds ipacmd)
 274 {
 275         struct qeth_ipa_cmd *cmd;
 276         struct qeth_cmd_buffer *iob;
 277
 278         QETH_CARD_TEXT_(card, 4, "L2sdv%x", ipacmd);
 279         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 280         if (!iob)
 281                 return -ENOMEM;
 282         cmd = __ipa_cmd(iob);
 283         cmd->data.setdelvlan.vlan_id = i;
 284         return qeth_setdelvlan_makerc(card, qeth_send_ipa_cmd(card, iob,
 285                                             qeth_l2_send_setdelvlan_cb, NULL));
 286 }
 287
 288 static void qeth_l2_process_vlans(struct qeth_card *card)
 289 {
 290         struct qeth_vlan_vid *id;
 291
 292         QETH_CARD_TEXT(card, 3, "L2prcvln");
 293         mutex_lock(&card->vid_list_mutex);
 294         list_for_each_entry(id, &card->vid_list, list) {
 295                 qeth_l2_send_setdelvlan(card, id->vid, IPA_CMD_SETVLAN);
 296         }
 297         mutex_unlock(&card->vid_list_mutex);
 298 }
 299
 300 static int qeth_l2_vlan_rx_add_vid(struct net_device *dev,
 301                                    __be16 proto, u16 vid)
 302 {
 303         struct qeth_card *card = dev->ml_priv;
 304         struct qeth_vlan_vid *id;
 305         int rc;
 306
 307         QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
 308         if (!vid)
 309                 return 0;
 310         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 311                 QETH_CARD_TEXT(card, 3, "aidREC");
 312                 return 0;
 313         }
 314         id = kmalloc(sizeof(*id), GFP_KERNEL);
 315         if (id) {
 316                 id->vid = vid;
 317                 rc = qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
 318                 if (rc) {
 319                         kfree(id);
 320                         return rc;
 321                 }
 322                 mutex_lock(&card->vid_list_mutex);
 323                 list_add_tail(&id->list, &card->vid_list);
 324                 mutex_unlock(&card->vid_list_mutex);
 325         } else {
 326                 return -ENOMEM;
 327         }
 328         return 0;
 329 }
 330
 331 static int qeth_l2_vlan_rx_kill_vid(struct net_device *dev,
 332                                     __be16 proto, u16 vid)
 333 {
 334         struct qeth_vlan_vid *id, *tmpid = NULL;
 335         struct qeth_card *card = dev->ml_priv;
 336         int rc = 0;
 337
 338         QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
 339         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 340                 QETH_CARD_TEXT(card, 3, "kidREC");
 341                 return 0;
 342         }
 343         mutex_lock(&card->vid_list_mutex);
 344         list_for_each_entry(id, &card->vid_list, list) {
 345                 if (id->vid == vid) {
 346                         list_del(&id->list);
 347                         tmpid = id;
 348                         break;
 349                 }
 350         }
 351         mutex_unlock(&card->vid_list_mutex);
 352         if (tmpid) {
 353                 rc = qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 354                 kfree(tmpid);
 355         }
 356         return rc;
 357 }
 358
 359 static void qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
 360 {
 361         QETH_DBF_TEXT(SETUP , 2, "stopcard");
 362         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 363
 364         qeth_set_allowed_threads(card, 0, 1);
 365         if (card->read.state == CH_STATE_UP &&
 366             card->write.state == CH_STATE_UP &&
 367             (card->state == CARD_STATE_UP)) {
 368                 if (recovery_mode &&
 369                     card->info.type != QETH_CARD_TYPE_OSN) {
 370                         qeth_l2_stop(card->dev);
 371                 } else {
 372                         rtnl_lock();
 373                         dev_close(card->dev);
 374                         rtnl_unlock();
 375                 }
 376                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 377                 card->state = CARD_STATE_SOFTSETUP;
 378         }
 379         if (card->state == CARD_STATE_SOFTSETUP) {
 380                 qeth_l2_del_all_macs(card);
 381                 qeth_clear_ipacmd_list(card);
 382                 card->state = CARD_STATE_HARDSETUP;
 383         }
 384         if (card->state == CARD_STATE_HARDSETUP) {
 385                 qeth_qdio_clear_card(card, 0);
 386                 qeth_clear_qdio_buffers(card);
 387                 qeth_clear_working_pool_list(card);
 388                 card->state = CARD_STATE_DOWN;
 389         }
 390         if (card->state == CARD_STATE_DOWN) {
 391                 qeth_clear_cmd_buffers(&card->read);
 392                 qeth_clear_cmd_buffers(&card->write);
 393         }
 394 }
 395
 396 static int qeth_l2_process_inbound_buffer(struct qeth_card *card,
 397                                 int budget, int *done)
 398 {
 399         int work_done = 0;
 400         struct sk_buff *skb;
 401         struct qeth_hdr *hdr;
 402         unsigned int len;
 403
 404         *done = 0;
 405         WARN_ON_ONCE(!budget);
 406         while (budget) {
 407                 skb = qeth_core_get_next_skb(card,
 408                         &card->qdio.in_q->bufs[card->rx.b_index],
 409                         &card->rx.b_element, &card->rx.e_offset, &hdr);
 410                 if (!skb) {
 411                         *done = 1;
 412                         break;
 413                 }
 414                 switch (hdr->hdr.l2.id) {
 415                 case QETH_HEADER_TYPE_LAYER2:
 416                         skb->protocol = eth_type_trans(skb, skb->dev);
 417                         qeth_rx_csum(card, skb, hdr->hdr.l2.flags[1]);
 418                         if (skb->protocol == htons(ETH_P_802_2))
 419                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
 420                         len = skb->len;
 421                         napi_gro_receive(&card->napi, skb);
 422                         break;
 423                 case QETH_HEADER_TYPE_OSN:
 424                         if (card->info.type == QETH_CARD_TYPE_OSN) {
 425                                 skb_push(skb, sizeof(struct qeth_hdr));
 426                                 skb_copy_to_linear_data(skb, hdr,
 427                                                 sizeof(struct qeth_hdr));
 428                                 len = skb->len;
 429                                 card->osn_info.data_cb(skb);
 430                                 break;
 431                         }
 432                         /* else unknown */
 433                 default:
 434                         dev_kfree_skb_any(skb);
 435                         QETH_CARD_TEXT(card, 3, "inbunkno");
 436                         QETH_DBF_HEX(CTRL, 3, hdr, sizeof(*hdr));
 437                         continue;
 438                 }
 439                 work_done++;
 440                 budget--;
 441                 card->stats.rx_packets++;
 442                 card->stats.rx_bytes += len;
 443         }
 444         return work_done;
 445 }
 446
 447 static int qeth_l2_request_initial_mac(struct qeth_card *card)
 448 {
 449         int rc = 0;
 450
 451         QETH_DBF_TEXT(SETUP, 2, "l2reqmac");
 452         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
 453
 454         if (MACHINE_IS_VM) {
 455                 rc = qeth_vm_request_mac(card);
 456                 if (!rc)
 457                         goto out;
 458                 QETH_DBF_MESSAGE(2, "z/VM MAC Service failed on device %s: x%x\n",
 459                                  CARD_BUS_ID(card), rc);
 460                 QETH_DBF_TEXT_(SETUP, 2, "err%04x", rc);
 461                 /* fall back to alternative mechanism: */
 462         }
 463
 464         if (card->info.type == QETH_CARD_TYPE_IQD ||
 465             card->info.type == QETH_CARD_TYPE_OSM ||
 466             card->info.type == QETH_CARD_TYPE_OSX ||
 467             card->info.guestlan) {
 468                 rc = qeth_setadpparms_change_macaddr(card);
 469                 if (!rc)
 470                         goto out;
 471                 QETH_DBF_MESSAGE(2, "READ_MAC Assist failed on device %s: x%x\n",
 472                                  CARD_BUS_ID(card), rc);
 473                 QETH_DBF_TEXT_(SETUP, 2, "1err%04x", rc);
 474                 /* fall back once more: */
 475         }
 476
 477         /* some devices don't support a custom MAC address: */
 478         if (card->info.type == QETH_CARD_TYPE_OSM ||
 479             card->info.type == QETH_CARD_TYPE_OSX)
 480                 return (rc) ? rc : -EADDRNOTAVAIL;
 481         eth_hw_addr_random(card->dev);
 482
 483 out:
 484         QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, card->dev->addr_len);
 485         return 0;
 486 }
 487
 488 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 489 {
 490         struct sockaddr *addr = p;
 491         struct qeth_card *card = dev->ml_priv;
 492         u8 old_addr[ETH_ALEN];
 493         int rc = 0;
 494
 495         QETH_CARD_TEXT(card, 3, "setmac");
 496
 497         if (card->info.type == QETH_CARD_TYPE_OSN ||
 498             card->info.type == QETH_CARD_TYPE_OSM ||
 499             card->info.type == QETH_CARD_TYPE_OSX) {
 500                 QETH_CARD_TEXT(card, 3, "setmcTYP");
 501                 return -EOPNOTSUPP;
 502         }
 503         QETH_CARD_HEX(card, 3, addr->sa_data, ETH_ALEN);
 504         if (!is_valid_ether_addr(addr->sa_data))
 505                 return -EADDRNOTAVAIL;
 506
 507         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 508                 QETH_CARD_TEXT(card, 3, "setmcREC");
 509                 return -ERESTARTSYS;
 510         }
 511
 512         /* avoid racing against concurrent state change: */
 513         if (!mutex_trylock(&card->conf_mutex))
 514                 return -EAGAIN;
 515
 516         if (!qeth_card_hw_is_reachable(card)) {
 517                 ether_addr_copy(dev->dev_addr, addr->sa_data);
 518                 goto out_unlock;
 519         }
 520
 521         /* don't register the same address twice */
 522         if (ether_addr_equal_64bits(dev->dev_addr, addr->sa_data) &&
 523             (card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
 524                 goto out_unlock;
 525
 526         /* add the new address, switch over, drop the old */
 527         rc = qeth_l2_send_setmac(card, addr->sa_data);
 528         if (rc)
 529                 goto out_unlock;
 530         ether_addr_copy(old_addr, dev->dev_addr);
 531         ether_addr_copy(dev->dev_addr, addr->sa_data);
 532
 533         if (card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED)
 534                 qeth_l2_remove_mac(card, old_addr);
 535         card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 536
 537 out_unlock:
 538         mutex_unlock(&card->conf_mutex);
 539         return rc;
 540 }
 541
 542 static void qeth_promisc_to_bridge(struct qeth_card *card)
 543 {
 544         struct net_device *dev = card->dev;
 545         enum qeth_ipa_promisc_modes promisc_mode;
 546         int role;
 547         int rc;
 548
 549         QETH_CARD_TEXT(card, 3, "pmisc2br");
 550
 551         if (!card->options.sbp.reflect_promisc)
 552                 return;
 553         promisc_mode = (dev->flags & IFF_PROMISC) ? SET_PROMISC_MODE_ON
 554                                                 : SET_PROMISC_MODE_OFF;
 555         if (promisc_mode == card->info.promisc_mode)
 556                 return;
 557
 558         if (promisc_mode == SET_PROMISC_MODE_ON) {
 559                 if (card->options.sbp.reflect_promisc_primary)
 560                         role = QETH_SBP_ROLE_PRIMARY;
 561                 else
 562                         role = QETH_SBP_ROLE_SECONDARY;
 563         } else
 564                 role = QETH_SBP_ROLE_NONE;
 565
 566         rc = qeth_bridgeport_setrole(card, role);
 567         QETH_DBF_TEXT_(SETUP, 2, "bpm%c%04x",
 568                         (promisc_mode == SET_PROMISC_MODE_ON) ? '+' : '-', rc);
 569         if (!rc) {
 570                 card->options.sbp.role = role;
 571                 card->info.promisc_mode = promisc_mode;
 572         }
 573
 574 }
 575 /* New MAC address is added to the hash table and marked to be written on card
 576  * only if there is not in the hash table storage already
 577  *
 578 */
 579 static void qeth_l2_add_mac(struct qeth_card *card, struct netdev_hw_addr *ha)
 580 {
 581         u32 mac_hash = get_unaligned((u32 *)(&ha->addr[2]));
 582         struct qeth_mac *mac;
 583
 584         hash_for_each_possible(card->mac_htable, mac, hnode, mac_hash) {
 585                 if (ether_addr_equal_64bits(ha->addr, mac->mac_addr)) {
 586                         mac->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
 587                         return;
 588                 }
 589         }
 590
 591         mac = kzalloc(sizeof(struct qeth_mac), GFP_ATOMIC);
 592         if (!mac)
 593                 return;
 594
 595         ether_addr_copy(mac->mac_addr, ha->addr);
 596         mac->disp_flag = QETH_DISP_ADDR_ADD;
 597
 598         hash_add(card->mac_htable, &mac->hnode, mac_hash);
 599 }
 600
 601 static void qeth_l2_set_rx_mode(struct net_device *dev)
 602 {
 603         struct qeth_card *card = dev->ml_priv;
 604         struct netdev_hw_addr *ha;
 605         struct qeth_mac *mac;
 606         struct hlist_node *tmp;
 607         int i;
 608         int rc;
 609
 610         if (card->info.type == QETH_CARD_TYPE_OSN)
 611                 return;
 612
 613         QETH_CARD_TEXT(card, 3, "setmulti");
 614         if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
 615             (card->state != CARD_STATE_UP))
 616                 return;
 617
 618         spin_lock_bh(&card->mclock);
 619
 620         netdev_for_each_mc_addr(ha, dev)
 621                 qeth_l2_add_mac(card, ha);
 622         netdev_for_each_uc_addr(ha, dev)
 623                 qeth_l2_add_mac(card, ha);
 624
 625         hash_for_each_safe(card->mac_htable, i, tmp, mac, hnode) {
 626                 switch (mac->disp_flag) {
 627                 case QETH_DISP_ADDR_DELETE:
 628                         qeth_l2_remove_mac(card, mac->mac_addr);
 629                         hash_del(&mac->hnode);
 630                         kfree(mac);
 631                         break;
 632                 case QETH_DISP_ADDR_ADD:
 633                         rc = qeth_l2_write_mac(card, mac->mac_addr);
 634                         if (rc) {
 635                                 hash_del(&mac->hnode);
 636                                 kfree(mac);
 637                                 break;
 638                         }
 639                         /* fall through */
 640                 default:
 641                         /* for next call to set_rx_mode(): */
 642                         mac->disp_flag = QETH_DISP_ADDR_DELETE;
 643                 }
 644         }
 645
 646         spin_unlock_bh(&card->mclock);
 647
 648         if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
 649                 qeth_setadp_promisc_mode(card);
 650         else
 651                 qeth_promisc_to_bridge(card);
 652 }
 653
 654 static int qeth_l2_xmit_osn(struct qeth_card *card, struct sk_buff *skb,
 655                             struct qeth_qdio_out_q *queue)
 656 {
 657         struct qeth_hdr *hdr = (struct qeth_hdr *)skb->data;
 658         addr_t end = (addr_t)(skb->data + sizeof(*hdr));
 659         addr_t start = (addr_t)skb->data;
 660         unsigned int elements = 0;
 661         unsigned int hd_len = 0;
 662         int rc;
 663
 664         if (skb->protocol == htons(ETH_P_IPV6))
 665                 return -EPROTONOSUPPORT;
 666
 667         if (qeth_get_elements_for_range(start, end) > 1) {
 668                 /* Misaligned HW header, move it to its own buffer element. */
 669                 hdr = kmem_cache_alloc(qeth_core_header_cache, GFP_ATOMIC);
 670                 if (!hdr)
 671                         return -ENOMEM;
 672                 hd_len = sizeof(*hdr);
 673                 skb_copy_from_linear_data(skb, (char *)hdr, hd_len);
 674                 elements++;
 675         }
 676
 677         elements += qeth_count_elements(skb, hd_len);
 678         if (elements > QETH_MAX_BUFFER_ELEMENTS(card)) {
 679                 rc = -E2BIG;
 680                 goto out;
 681         }
 682
 683         rc = qeth_do_send_packet(card, queue, skb, hdr, hd_len, hd_len,
 684                                  elements);
 685 out:
 686         if (rc && hd_len)
 687                 kmem_cache_free(qeth_core_header_cache, hdr);
 688         return rc;
 689 }
 690
 691 static netdev_tx_t qeth_l2_hard_start_xmit(struct sk_buff *skb,
 692                                            struct net_device *dev)
 693 {
 694         struct qeth_card *card = dev->ml_priv;
 695         int cast_type = qeth_l2_get_cast_type(card, skb);
 696         int ipv = qeth_get_ip_version(skb);
 697         struct qeth_qdio_out_q *queue;
 698         int tx_bytes = skb->len;
 699         int rc;
 700
 701         if (card->state != CARD_STATE_UP) {
 702                 card->stats.tx_carrier_errors++;
 703                 goto tx_drop;
 704         }
 705
 706         queue = qeth_get_tx_queue(card, skb, ipv, cast_type);
 707
 708         if (card->options.performance_stats) {
 709                 card->perf_stats.outbound_cnt++;
 710                 card->perf_stats.outbound_start_time = qeth_get_micros();
 711         }
 712         netif_stop_queue(dev);
 713
 714         if (IS_OSN(card))
 715                 rc = qeth_l2_xmit_osn(card, skb, queue);
 716         else
 717                 rc = qeth_xmit(card, skb, queue, ipv, cast_type,
 718                                qeth_l2_fill_header);
 719
 720         if (!rc) {
 721                 card->stats.tx_packets++;
 722                 card->stats.tx_bytes += tx_bytes;
 723                 if (card->options.performance_stats)
 724                         card->perf_stats.outbound_time += qeth_get_micros() -
 725                                 card->perf_stats.outbound_start_time;
 726                 netif_wake_queue(dev);
 727                 return NETDEV_TX_OK;
 728         } else if (rc == -EBUSY) {
 729                 return NETDEV_TX_BUSY;
 730         } /* else fall through */
 731
 732 tx_drop:
 733         card->stats.tx_dropped++;
 734         card->stats.tx_errors++;
 735         dev_kfree_skb_any(skb);
 736         netif_wake_queue(dev);
 737         return NETDEV_TX_OK;
 738 }
 739
 740 static int __qeth_l2_open(struct net_device *dev)
 741 {
 742         struct qeth_card *card = dev->ml_priv;
 743         int rc = 0;
 744
 745         QETH_CARD_TEXT(card, 4, "qethopen");
 746         if (card->state == CARD_STATE_UP)
 747                 return rc;
 748         if (card->state != CARD_STATE_SOFTSETUP)
 749                 return -ENODEV;
 750
 751         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
 752              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
 753                 QETH_CARD_TEXT(card, 4, "nomacadr");
 754                 return -EPERM;
 755         }
 756         card->data.state = CH_STATE_UP;
 757         card->state = CARD_STATE_UP;
 758         netif_start_queue(dev);
 759
 760         if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) {
 761                 napi_enable(&card->napi);
 762                 local_bh_disable();
 763                 napi_schedule(&card->napi);
 764                 /* kick-start the NAPI softirq: */
 765                 local_bh_enable();
 766         } else
 767                 rc = -EIO;
 768         return rc;
 769 }
 770
 771 static int qeth_l2_open(struct net_device *dev)
 772 {
 773         struct qeth_card *card = dev->ml_priv;
 774
 775         QETH_CARD_TEXT(card, 5, "qethope_");
 776         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 777                 QETH_CARD_TEXT(card, 3, "openREC");
 778                 return -ERESTARTSYS;
 779         }
 780         return __qeth_l2_open(dev);
 781 }
 782
 783 static int qeth_l2_stop(struct net_device *dev)
 784 {
 785         struct qeth_card *card = dev->ml_priv;
 786
 787         QETH_CARD_TEXT(card, 4, "qethstop");
 788         netif_tx_disable(dev);
 789         if (card->state == CARD_STATE_UP) {
 790                 card->state = CARD_STATE_SOFTSETUP;
 791                 napi_disable(&card->napi);
 792         }
 793         return 0;
 794 }
 795
 796 static const struct device_type qeth_l2_devtype = {
 797         .name = "qeth_layer2",
 798         .groups = qeth_l2_attr_groups,
 799 };
 800
 801 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 802 {
 803         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 804         int rc;
 805
 806         if (gdev->dev.type == &qeth_generic_devtype) {
 807                 rc = qeth_l2_create_device_attributes(&gdev->dev);
 808                 if (rc)
 809                         return rc;
 810         }
 811         INIT_LIST_HEAD(&card->vid_list);
 812         hash_init(card->mac_htable);
 813         card->info.hwtrap = 0;
 814         qeth_l2_vnicc_set_defaults(card);
 815         return 0;
 816 }
 817
 818 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
 819 {
 820         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
 821
 822         if (cgdev->dev.type == &qeth_generic_devtype)
 823                 qeth_l2_remove_device_attributes(&cgdev->dev);
 824         qeth_set_allowed_threads(card, 0, 1);
 825         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 826
 827         if (cgdev->state == CCWGROUP_ONLINE)
 828                 qeth_l2_set_offline(cgdev);
 829         unregister_netdev(card->dev);
 830 }
 831
 832 static const struct ethtool_ops qeth_l2_ethtool_ops = {
 833         .get_link = ethtool_op_get_link,
 834         .get_strings = qeth_core_get_strings,
 835         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 836         .get_sset_count = qeth_core_get_sset_count,
 837         .get_drvinfo = qeth_core_get_drvinfo,
 838         .get_link_ksettings = qeth_core_ethtool_get_link_ksettings,
 839 };
 840
 841 static const struct ethtool_ops qeth_l2_osn_ops = {
 842         .get_strings = qeth_core_get_strings,
 843         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 844         .get_sset_count = qeth_core_get_sset_count,
 845         .get_drvinfo = qeth_core_get_drvinfo,
 846 };
 847
 848 static const struct net_device_ops qeth_l2_netdev_ops = {
 849         .ndo_open               = qeth_l2_open,
 850         .ndo_stop               = qeth_l2_stop,
 851         .ndo_get_stats          = qeth_get_stats,
 852         .ndo_start_xmit         = qeth_l2_hard_start_xmit,
 853         .ndo_features_check     = qeth_features_check,
 854         .ndo_validate_addr      = eth_validate_addr,
 855         .ndo_set_rx_mode        = qeth_l2_set_rx_mode,
 856         .ndo_do_ioctl           = qeth_do_ioctl,
 857         .ndo_set_mac_address    = qeth_l2_set_mac_address,
 858         .ndo_vlan_rx_add_vid    = qeth_l2_vlan_rx_add_vid,
 859         .ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,
 860         .ndo_tx_timeout         = qeth_tx_timeout,
 861         .ndo_fix_features       = qeth_fix_features,
 862         .ndo_set_features       = qeth_set_features
 863 };
 864
 865 static int qeth_l2_setup_netdev(struct qeth_card *card)
 866 {
 867         int rc;
 868
 869         if (card->dev->netdev_ops)
 870                 return 0;
 871
 872         card->dev->priv_flags |= IFF_UNICAST_FLT;
 873         card->dev->netdev_ops = &qeth_l2_netdev_ops;
 874         if (card->info.type == QETH_CARD_TYPE_OSN) {
 875                 card->dev->ethtool_ops = &qeth_l2_osn_ops;
 876                 card->dev->flags |= IFF_NOARP;
 877         } else {
 878                 card->dev->ethtool_ops = &qeth_l2_ethtool_ops;
 879                 card->dev->needed_headroom = sizeof(struct qeth_hdr);
 880         }
 881
 882         if (card->info.type == QETH_CARD_TYPE_OSM)
 883                 card->dev->features |= NETIF_F_VLAN_CHALLENGED;
 884         else
 885                 card->dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
 886
 887         if (card->info.type == QETH_CARD_TYPE_OSD && !card->info.guestlan) {
 888                 card->dev->features |= NETIF_F_SG;
 889                 /* OSA 3S and earlier has no RX/TX support */
 890                 if (qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM)) {
 891                         card->dev->hw_features |= NETIF_F_IP_CSUM;
 892                         card->dev->vlan_features |= NETIF_F_IP_CSUM;
 893                 }
 894         }
 895         if (qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) {
 896                 card->dev->hw_features |= NETIF_F_IPV6_CSUM;
 897                 card->dev->vlan_features |= NETIF_F_IPV6_CSUM;
 898         }
 899         if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM) ||
 900             qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6)) {
 901                 card->dev->hw_features |= NETIF_F_RXCSUM;
 902                 card->dev->vlan_features |= NETIF_F_RXCSUM;
 903         }
 904         if (qeth_is_supported(card, IPA_OUTBOUND_TSO)) {
 905                 card->dev->hw_features |= NETIF_F_TSO;
 906                 card->dev->vlan_features |= NETIF_F_TSO;
 907         }
 908         if (qeth_is_supported6(card, IPA_OUTBOUND_TSO)) {
 909                 card->dev->hw_features |= NETIF_F_TSO6;
 910                 card->dev->vlan_features |= NETIF_F_TSO6;
 911         }
 912
 913         if (card->dev->hw_features & (NETIF_F_TSO | NETIF_F_TSO6)) {
 914                 card->dev->needed_headroom = sizeof(struct qeth_hdr_tso);
 915                 netif_set_gso_max_size(card->dev,
 916                                        PAGE_SIZE * (QDIO_MAX_ELEMENTS_PER_BUFFER - 1));
 917         }
 918
 919         qeth_l2_request_initial_mac(card);
 920         netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT);
 921         rc = register_netdev(card->dev);
 922         if (rc)
 923                 card->dev->netdev_ops = NULL;
 924         return rc;
 925 }
 926
 927 static int qeth_l2_start_ipassists(struct qeth_card *card)
 928 {
 929         /* configure isolation level */
 930         if (qeth_set_access_ctrl_online(card, 0))
 931                 return -ENODEV;
 932         return 0;
 933 }
 934
 935 static void qeth_l2_trace_features(struct qeth_card *card)
 936 {
 937         /* Set BridgePort features */
 938         QETH_CARD_TEXT(card, 2, "featuSBP");
 939         QETH_CARD_HEX(card, 2, &card->options.sbp.supported_funcs,
 940                       sizeof(card->options.sbp.supported_funcs));
 941         /* VNIC Characteristics features */
 942         QETH_CARD_TEXT(card, 2, "feaVNICC");
 943         QETH_CARD_HEX(card, 2, &card->options.vnicc.sup_chars,
 944                       sizeof(card->options.vnicc.sup_chars));
 945 }
 946
 947 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 948 {
 949         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 950         int rc = 0;
 951         enum qeth_card_states recover_flag;
 952
 953         mutex_lock(&card->discipline_mutex);
 954         mutex_lock(&card->conf_mutex);
 955         QETH_DBF_TEXT(SETUP, 2, "setonlin");
 956         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 957
 958         recover_flag = card->state;
 959         rc = qeth_core_hardsetup_card(card);
 960         if (rc) {
 961                 QETH_DBF_TEXT_(SETUP, 2, "2err%04x", rc);
 962                 rc = -ENODEV;
 963                 goto out_remove;
 964         }
 965         qeth_bridgeport_query_support(card);
 966         if (card->options.sbp.supported_funcs)
 967                 dev_info(&card->gdev->dev,
 968                 "The device represents a Bridge Capable Port\n");
 969
 970         rc = qeth_l2_setup_netdev(card);
 971         if (rc)
 972                 goto out_remove;
 973
 974         if (card->info.type != QETH_CARD_TYPE_OSN &&
 975             !qeth_l2_send_setmac(card, card->dev->dev_addr))
 976                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 977
 978         if (qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP)) {
 979                 if (card->info.hwtrap &&
 980                     qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM))
 981                         card->info.hwtrap = 0;
 982         } else
 983                 card->info.hwtrap = 0;
 984
 985         /* for the rx_bcast characteristic, init VNICC after setmac */
 986         qeth_l2_vnicc_init(card);
 987
 988         qeth_trace_features(card);
 989         qeth_l2_trace_features(card);
 990
 991         qeth_l2_setup_bridgeport_attrs(card);
 992
 993         card->state = CARD_STATE_HARDSETUP;
 994         qeth_print_status_message(card);
 995
 996         /* softsetup */
 997         QETH_DBF_TEXT(SETUP, 2, "softsetp");
 998
 999         if ((card->info.type == QETH_CARD_TYPE_OSD) ||
1000             (card->info.type == QETH_CARD_TYPE_OSX)) {
1001                 rc = qeth_l2_start_ipassists(card);
1002                 if (rc)
1003                         goto out_remove;
1004         }
1005
1006         if (card->info.type != QETH_CARD_TYPE_OSN)
1007                 qeth_l2_process_vlans(card);
1008
1009         netif_tx_disable(card->dev);
1010
1011         rc = qeth_init_qdio_queues(card);
1012         if (rc) {
1013                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1014                 rc = -ENODEV;
1015                 goto out_remove;
1016         }
1017         card->state = CARD_STATE_SOFTSETUP;
1018
1019         qeth_set_allowed_threads(card, 0xffffffff, 0);
1020
1021         qeth_enable_hw_features(card->dev);
1022         if (recover_flag == CARD_STATE_RECOVER) {
1023                 if (recovery_mode &&
1024                     card->info.type != QETH_CARD_TYPE_OSN) {
1025                         __qeth_l2_open(card->dev);
1026                         qeth_l2_set_rx_mode(card->dev);
1027                 } else {
1028                         rtnl_lock();
1029                         dev_open(card->dev);
1030                         rtnl_unlock();
1031                 }
1032         }
1033         /* let user_space know that device is online */
1034         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1035         mutex_unlock(&card->conf_mutex);
1036         mutex_unlock(&card->discipline_mutex);
1037         return 0;
1038
1039 out_remove:
1040         qeth_l2_stop_card(card, 0);
1041         ccw_device_set_offline(CARD_DDEV(card));
1042         ccw_device_set_offline(CARD_WDEV(card));
1043         ccw_device_set_offline(CARD_RDEV(card));
1044         qdio_free(CARD_DDEV(card));
1045         if (recover_flag == CARD_STATE_RECOVER)
1046                 card->state = CARD_STATE_RECOVER;
1047         else
1048                 card->state = CARD_STATE_DOWN;
1049         mutex_unlock(&card->conf_mutex);
1050         mutex_unlock(&card->discipline_mutex);
1051         return rc;
1052 }
1053
1054 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1055 {
1056         return __qeth_l2_set_online(gdev, 0);
1057 }
1058
1059 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1060                                         int recovery_mode)
1061 {
1062         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1063         int rc = 0, rc2 = 0, rc3 = 0;
1064         enum qeth_card_states recover_flag;
1065
1066         mutex_lock(&card->discipline_mutex);
1067         mutex_lock(&card->conf_mutex);
1068         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1069         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1070
1071         netif_carrier_off(card->dev);
1072         recover_flag = card->state;
1073         if ((!recovery_mode && card->info.hwtrap) || card->info.hwtrap == 2) {
1074                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1075                 card->info.hwtrap = 1;
1076         }
1077         qeth_l2_stop_card(card, recovery_mode);
1078         rc  = ccw_device_set_offline(CARD_DDEV(card));
1079         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1080         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1081         if (!rc)
1082                 rc = (rc2) ? rc2 : rc3;
1083         if (rc)
1084                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1085         qdio_free(CARD_DDEV(card));
1086         if (recover_flag == CARD_STATE_UP)
1087                 card->state = CARD_STATE_RECOVER;
1088         /* let user_space know that device is offline */
1089         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1090         mutex_unlock(&card->conf_mutex);
1091         mutex_unlock(&card->discipline_mutex);
1092         return 0;
1093 }
1094
1095 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1096 {
1097         return __qeth_l2_set_offline(cgdev, 0);
1098 }
1099
1100 static int qeth_l2_recover(void *ptr)
1101 {
1102         struct qeth_card *card;
1103         int rc = 0;
1104
1105         card = (struct qeth_card *) ptr;
1106         QETH_CARD_TEXT(card, 2, "recover1");
1107         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1108                 return 0;
1109         QETH_CARD_TEXT(card, 2, "recover2");
1110         dev_warn(&card->gdev->dev,
1111                 "A recovery process has been started for the device\n");
1112         qeth_set_recovery_task(card);
1113         __qeth_l2_set_offline(card->gdev, 1);
1114         rc = __qeth_l2_set_online(card->gdev, 1);
1115         if (!rc)
1116                 dev_info(&card->gdev->dev,
1117                         "Device successfully recovered!\n");
1118         else {
1119                 qeth_close_dev(card);
1120                 dev_warn(&card->gdev->dev, "The qeth device driver "
1121                                 "failed to recover an error on the device\n");
1122         }
1123         qeth_clear_recovery_task(card);
1124         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1125         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1126         return 0;
1127 }
1128
1129 static int __init qeth_l2_init(void)
1130 {
1131         pr_info("register layer 2 discipline\n");
1132         return 0;
1133 }
1134
1135 static void __exit qeth_l2_exit(void)
1136 {
1137         pr_info("unregister layer 2 discipline\n");
1138 }
1139
1140 static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev)
1141 {
1142         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1143
1144         netif_device_detach(card->dev);
1145         qeth_set_allowed_threads(card, 0, 1);
1146         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1147         if (gdev->state == CCWGROUP_OFFLINE)
1148                 return 0;
1149         if (card->state == CARD_STATE_UP) {
1150                 if (card->info.hwtrap)
1151                         qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1152                 __qeth_l2_set_offline(card->gdev, 1);
1153         } else
1154                 __qeth_l2_set_offline(card->gdev, 0);
1155         return 0;
1156 }
1157
1158 static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
1159 {
1160         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1161         int rc = 0;
1162
1163         if (card->state == CARD_STATE_RECOVER) {
1164                 rc = __qeth_l2_set_online(card->gdev, 1);
1165                 if (rc) {
1166                         rtnl_lock();
1167                         dev_close(card->dev);
1168                         rtnl_unlock();
1169                 }
1170         } else
1171                 rc = __qeth_l2_set_online(card->gdev, 0);
1172
1173         qeth_set_allowed_threads(card, 0xffffffff, 0);
1174         netif_device_attach(card->dev);
1175         if (rc)
1176                 dev_warn(&card->gdev->dev, "The qeth device driver "
1177                         "failed to recover an error on the device\n");
1178         return rc;
1179 }
1180
1181 /* Returns zero if the command is successfully "consumed" */
1182 static int qeth_l2_control_event(struct qeth_card *card,
1183                                         struct qeth_ipa_cmd *cmd)
1184 {
1185         switch (cmd->hdr.command) {
1186         case IPA_CMD_SETBRIDGEPORT_OSA:
1187         case IPA_CMD_SETBRIDGEPORT_IQD:
1188                 if (cmd->data.sbp.hdr.command_code ==
1189                                 IPA_SBP_BRIDGE_PORT_STATE_CHANGE) {
1190                         qeth_bridge_state_change(card, cmd);
1191                         return 0;
1192                 } else
1193                         return 1;
1194         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
1195                 qeth_bridge_host_event(card, cmd);
1196                 return 0;
1197         default:
1198                 return 1;
1199         }
1200 }
1201
1202 struct qeth_discipline qeth_l2_discipline = {
1203         .devtype = &qeth_l2_devtype,
1204         .process_rx_buffer = qeth_l2_process_inbound_buffer,
1205         .recover = qeth_l2_recover,
1206         .setup = qeth_l2_probe_device,
1207         .remove = qeth_l2_remove_device,
1208         .set_online = qeth_l2_set_online,
1209         .set_offline = qeth_l2_set_offline,
1210         .freeze = qeth_l2_pm_suspend,
1211         .thaw = qeth_l2_pm_resume,
1212         .restore = qeth_l2_pm_resume,
1213         .do_ioctl = NULL,
1214         .control_event_handler = qeth_l2_control_event,
1215 };
1216 EXPORT_SYMBOL_GPL(qeth_l2_discipline);
1217
1218 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1219                            struct qeth_cmd_buffer *iob)
1220 {
1221         struct qeth_channel *channel = iob->channel;
1222         int rc = 0;
1223
1224         QETH_CARD_TEXT(card, 5, "osndctrd");
1225
1226         wait_event(card->wait_q,
1227                    atomic_cmpxchg(&channel->irq_pending, 0, 1) == 0);
1228         qeth_prepare_control_data(card, len, iob);
1229         QETH_CARD_TEXT(card, 6, "osnoirqp");
1230         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1231         rc = ccw_device_start_timeout(channel->ccwdev, channel->ccw,
1232                                       (addr_t) iob, 0, 0, QETH_IPA_TIMEOUT);
1233         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1234         if (rc) {
1235                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1236                            "ccw_device_start rc = %i\n", rc);
1237                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1238                 qeth_release_buffer(channel, iob);
1239                 atomic_set(&channel->irq_pending, 0);
1240                 wake_up(&card->wait_q);
1241         }
1242         return rc;
1243 }
1244
1245 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1246                         struct qeth_cmd_buffer *iob, int data_len)
1247 {
1248         u16 s1, s2;
1249
1250         QETH_CARD_TEXT(card, 4, "osndipa");
1251
1252         qeth_prepare_ipa_cmd(card, iob);
1253         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1254         s2 = (u16)data_len;
1255         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1256         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1257         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1258         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1259         return qeth_osn_send_control_data(card, s1, iob);
1260 }
1261
1262 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1263 {
1264         struct qeth_cmd_buffer *iob;
1265         struct qeth_card *card;
1266
1267         if (!dev)
1268                 return -ENODEV;
1269         card = dev->ml_priv;
1270         if (!card)
1271                 return -ENODEV;
1272         QETH_CARD_TEXT(card, 2, "osnsdmc");
1273         if (!qeth_card_hw_is_reachable(card))
1274                 return -ENODEV;
1275         iob = qeth_wait_for_buffer(&card->write);
1276         memcpy(__ipa_cmd(iob), data, data_len);
1277         return qeth_osn_send_ipa_cmd(card, iob, data_len);
1278 }
1279 EXPORT_SYMBOL(qeth_osn_assist);
1280
1281 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1282                   int (*assist_cb)(struct net_device *, void *),
1283                   int (*data_cb)(struct sk_buff *))
1284 {
1285         struct qeth_card *card;
1286
1287         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1288         if (*dev == NULL)
1289                 return -ENODEV;
1290         card = (*dev)->ml_priv;
1291         if (!card)
1292                 return -ENODEV;
1293         QETH_CARD_TEXT(card, 2, "osnreg");
1294         if ((assist_cb == NULL) || (data_cb == NULL))
1295                 return -EINVAL;
1296         card->osn_info.assist_cb = assist_cb;
1297         card->osn_info.data_cb = data_cb;
1298         return 0;
1299 }
1300 EXPORT_SYMBOL(qeth_osn_register);
1301
1302 void qeth_osn_deregister(struct net_device *dev)
1303 {
1304         struct qeth_card *card;
1305
1306         if (!dev)
1307                 return;
1308         card = dev->ml_priv;
1309         if (!card)
1310                 return;
1311         QETH_CARD_TEXT(card, 2, "osndereg");
1312         card->osn_info.assist_cb = NULL;
1313         card->osn_info.data_cb = NULL;
1314         return;
1315 }
1316 EXPORT_SYMBOL(qeth_osn_deregister);
1317
1318 /* SETBRIDGEPORT support, async notifications */
1319
1320 enum qeth_an_event_type {anev_reg_unreg, anev_abort, anev_reset};
1321
1322 /**
1323  * qeth_bridge_emit_host_event() - bridgeport address change notification
1324  * @card:  qeth_card structure pointer, for udev events.
1325  * @evtype:  "normal" register/unregister, or abort, or reset. For abort
1326  *            and reset token and addr_lnid are unused and may be NULL.
1327  * @code:  event bitmask: high order bit 0x80 value 1 means removal of an
1328  *                        object, 0 - addition of an object.
1329  *                        0x01 - VLAN, 0x02 - MAC, 0x03 - VLAN and MAC.
1330  * @token: "network token" structure identifying physical address of the port.
1331  * @addr_lnid: pointer to structure with MAC address and VLAN ID.
1332  *
1333  * This function is called when registrations and deregistrations are
1334  * reported by the hardware, and also when notifications are enabled -
1335  * for all currently registered addresses.
1336  */
1337 static void qeth_bridge_emit_host_event(struct qeth_card *card,
1338         enum qeth_an_event_type evtype,
1339         u8 code, struct net_if_token *token, struct mac_addr_lnid *addr_lnid)
1340 {
1341         char str[7][32];
1342         char *env[8];
1343         int i = 0;
1344
1345         switch (evtype) {
1346         case anev_reg_unreg:
1347                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=%s",
1348                                 (code & IPA_ADDR_CHANGE_CODE_REMOVAL)
1349                                 ? "deregister" : "register");
1350                 env[i] = str[i]; i++;
1351                 if (code & IPA_ADDR_CHANGE_CODE_VLANID) {
1352                         snprintf(str[i], sizeof(str[i]), "VLAN=%d",
1353                                 addr_lnid->lnid);
1354                         env[i] = str[i]; i++;
1355                 }
1356                 if (code & IPA_ADDR_CHANGE_CODE_MACADDR) {
1357                         snprintf(str[i], sizeof(str[i]), "MAC=%pM",
1358                                 addr_lnid->mac);
1359                         env[i] = str[i]; i++;
1360                 }
1361                 snprintf(str[i], sizeof(str[i]), "NTOK_BUSID=%x.%x.%04x",
1362                         token->cssid, token->ssid, token->devnum);
1363                 env[i] = str[i]; i++;
1364                 snprintf(str[i], sizeof(str[i]), "NTOK_IID=%02x", token->iid);
1365                 env[i] = str[i]; i++;
1366                 snprintf(str[i], sizeof(str[i]), "NTOK_CHPID=%02x",
1367                                 token->chpid);
1368                 env[i] = str[i]; i++;
1369                 snprintf(str[i], sizeof(str[i]), "NTOK_CHID=%04x", token->chid);
1370                 env[i] = str[i]; i++;
1371                 break;
1372         case anev_abort:
1373                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=abort");
1374                 env[i] = str[i]; i++;
1375                 break;
1376         case anev_reset:
1377                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=reset");
1378                 env[i] = str[i]; i++;
1379                 break;
1380         }
1381         env[i] = NULL;
1382         kobject_uevent_env(&card->gdev->dev.kobj, KOBJ_CHANGE, env);
1383 }
1384
1385 struct qeth_bridge_state_data {
1386         struct work_struct worker;
1387         struct qeth_card *card;
1388         struct qeth_sbp_state_change qports;
1389 };
1390
1391 static void qeth_bridge_state_change_worker(struct work_struct *work)
1392 {
1393         struct qeth_bridge_state_data *data =
1394                 container_of(work, struct qeth_bridge_state_data, worker);
1395         /* We are only interested in the first entry - local port */
1396         struct qeth_sbp_port_entry *entry = &data->qports.entry[0];
1397         char env_locrem[32];
1398         char env_role[32];
1399         char env_state[32];
1400         char *env[] = {
1401                 env_locrem,
1402                 env_role,
1403                 env_state,
1404                 NULL
1405         };
1406
1407         /* Role should not change by itself, but if it did, */
1408         /* information from the hardware is authoritative.  */
1409         mutex_lock(&data->card->conf_mutex);
1410         data->card->options.sbp.role = entry->role;
1411         mutex_unlock(&data->card->conf_mutex);
1412
1413         snprintf(env_locrem, sizeof(env_locrem), "BRIDGEPORT=statechange");
1414         snprintf(env_role, sizeof(env_role), "ROLE=%s",
1415                 (entry->role == QETH_SBP_ROLE_NONE) ? "none" :
1416                 (entry->role == QETH_SBP_ROLE_PRIMARY) ? "primary" :
1417                 (entry->role == QETH_SBP_ROLE_SECONDARY) ? "secondary" :
1418                 "<INVALID>");
1419         snprintf(env_state, sizeof(env_state), "STATE=%s",
1420                 (entry->state == QETH_SBP_STATE_INACTIVE) ? "inactive" :
1421                 (entry->state == QETH_SBP_STATE_STANDBY) ? "standby" :
1422                 (entry->state == QETH_SBP_STATE_ACTIVE) ? "active" :
1423                 "<INVALID>");
1424         kobject_uevent_env(&data->card->gdev->dev.kobj,
1425                                 KOBJ_CHANGE, env);
1426         kfree(data);
1427 }
1428
1429 static void qeth_bridge_state_change(struct qeth_card *card,
1430                                         struct qeth_ipa_cmd *cmd)
1431 {
1432         struct qeth_sbp_state_change *qports =
1433                  &cmd->data.sbp.data.state_change;
1434         struct qeth_bridge_state_data *data;
1435         int extrasize;
1436
1437         QETH_CARD_TEXT(card, 2, "brstchng");
1438         if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1439                 QETH_CARD_TEXT_(card, 2, "BPsz%04x", qports->entry_length);
1440                 return;
1441         }
1442         extrasize = sizeof(struct qeth_sbp_port_entry) * qports->num_entries;
1443         data = kzalloc(sizeof(struct qeth_bridge_state_data) + extrasize,
1444                 GFP_ATOMIC);
1445         if (!data) {
1446                 QETH_CARD_TEXT(card, 2, "BPSalloc");
1447                 return;
1448         }
1449         INIT_WORK(&data->worker, qeth_bridge_state_change_worker);
1450         data->card = card;
1451         memcpy(&data->qports, qports,
1452                         sizeof(struct qeth_sbp_state_change) + extrasize);
1453         queue_work(qeth_wq, &data->worker);
1454 }
1455
1456 struct qeth_bridge_host_data {
1457         struct work_struct worker;
1458         struct qeth_card *card;
1459         struct qeth_ipacmd_addr_change hostevs;
1460 };
1461
1462 static void qeth_bridge_host_event_worker(struct work_struct *work)
1463 {
1464         struct qeth_bridge_host_data *data =
1465                 container_of(work, struct qeth_bridge_host_data, worker);
1466         int i;
1467
1468         if (data->hostevs.lost_event_mask) {
1469                 dev_info(&data->card->gdev->dev,
1470 "Address notification from the Bridge Port stopped %s (%s)\n",
1471                         data->card->dev->name,
1472                         (data->hostevs.lost_event_mask == 0x01)
1473                         ? "Overflow"
1474                         : (data->hostevs.lost_event_mask == 0x02)
1475                         ? "Bridge port state change"
1476                         : "Unknown reason");
1477                 mutex_lock(&data->card->conf_mutex);
1478                 data->card->options.sbp.hostnotification = 0;
1479                 mutex_unlock(&data->card->conf_mutex);
1480                 qeth_bridge_emit_host_event(data->card, anev_abort,
1481                         0, NULL, NULL);
1482         } else
1483                 for (i = 0; i < data->hostevs.num_entries; i++) {
1484                         struct qeth_ipacmd_addr_change_entry *entry =
1485                                         &data->hostevs.entry[i];
1486                         qeth_bridge_emit_host_event(data->card,
1487                                         anev_reg_unreg,
1488                                         entry->change_code,
1489                                         &entry->token, &entry->addr_lnid);
1490                 }
1491         kfree(data);
1492 }
1493
1494 static void qeth_bridge_host_event(struct qeth_card *card,
1495                                         struct qeth_ipa_cmd *cmd)
1496 {
1497         struct qeth_ipacmd_addr_change *hostevs =
1498                  &cmd->data.addrchange;
1499         struct qeth_bridge_host_data *data;
1500         int extrasize;
1501
1502         QETH_CARD_TEXT(card, 2, "brhostev");
1503         if (cmd->hdr.return_code != 0x0000) {
1504                 if (cmd->hdr.return_code == 0x0010) {
1505                         if (hostevs->lost_event_mask == 0x00)
1506                                 hostevs->lost_event_mask = 0xff;
1507                 } else {
1508                         QETH_CARD_TEXT_(card, 2, "BPHe%04x",
1509                                 cmd->hdr.return_code);
1510                         return;
1511                 }
1512         }
1513         extrasize = sizeof(struct qeth_ipacmd_addr_change_entry) *
1514                                                 hostevs->num_entries;
1515         data = kzalloc(sizeof(struct qeth_bridge_host_data) + extrasize,
1516                 GFP_ATOMIC);
1517         if (!data) {
1518                 QETH_CARD_TEXT(card, 2, "BPHalloc");
1519                 return;
1520         }
1521         INIT_WORK(&data->worker, qeth_bridge_host_event_worker);
1522         data->card = card;
1523         memcpy(&data->hostevs, hostevs,
1524                         sizeof(struct qeth_ipacmd_addr_change) + extrasize);
1525         queue_work(qeth_wq, &data->worker);
1526 }
1527
1528 /* SETBRIDGEPORT support; sending commands */
1529
1530 struct _qeth_sbp_cbctl {
1531         u16 ipa_rc;
1532         u16 cmd_rc;
1533         union {
1534                 u32 supported;
1535                 struct {
1536                         enum qeth_sbp_roles *role;
1537                         enum qeth_sbp_states *state;
1538                 } qports;
1539         } data;
1540 };
1541
1542 /**
1543  * qeth_bridgeport_makerc() - derive "traditional" error from hardware codes.
1544  * @card:                     qeth_card structure pointer, for debug messages.
1545  * @cbctl:                    state structure with hardware return codes.
1546  * @setcmd:                   IPA command code
1547  *
1548  * Returns negative errno-compatible error indication or 0 on success.
1549  */
1550 static int qeth_bridgeport_makerc(struct qeth_card *card,
1551         struct _qeth_sbp_cbctl *cbctl, enum qeth_ipa_sbp_cmd setcmd)
1552 {
1553         int rc;
1554         int is_iqd = (card->info.type == QETH_CARD_TYPE_IQD);
1555
1556         if ((is_iqd && (cbctl->ipa_rc == IPA_RC_SUCCESS)) ||
1557             (!is_iqd && (cbctl->ipa_rc == cbctl->cmd_rc)))
1558                 switch (cbctl->cmd_rc) {
1559                 case IPA_RC_SUCCESS:
1560                         rc = 0;
1561                         break;
1562                 case IPA_RC_L2_UNSUPPORTED_CMD:
1563                 case IPA_RC_UNSUPPORTED_COMMAND:
1564                         rc = -EOPNOTSUPP;
1565                         break;
1566                 case IPA_RC_SBP_OSA_NOT_CONFIGURED:
1567                 case IPA_RC_SBP_IQD_NOT_CONFIGURED:
1568                         rc = -ENODEV; /* maybe not the best code here? */
1569                         dev_err(&card->gdev->dev,
1570         "The device is not configured as a Bridge Port\n");
1571                         break;
1572                 case IPA_RC_SBP_OSA_OS_MISMATCH:
1573                 case IPA_RC_SBP_IQD_OS_MISMATCH:
1574                         rc = -EPERM;
1575                         dev_err(&card->gdev->dev,
1576         "A Bridge Port is already configured by a different operating system\n");
1577                         break;
1578                 case IPA_RC_SBP_OSA_ANO_DEV_PRIMARY:
1579                 case IPA_RC_SBP_IQD_ANO_DEV_PRIMARY:
1580                         switch (setcmd) {
1581                         case IPA_SBP_SET_PRIMARY_BRIDGE_PORT:
1582                                 rc = -EEXIST;
1583                                 dev_err(&card->gdev->dev,
1584         "The LAN already has a primary Bridge Port\n");
1585                                 break;
1586                         case IPA_SBP_SET_SECONDARY_BRIDGE_PORT:
1587                                 rc = -EBUSY;
1588                                 dev_err(&card->gdev->dev,
1589         "The device is already a primary Bridge Port\n");
1590                                 break;
1591                         default:
1592                                 rc = -EIO;
1593                         }
1594                         break;
1595                 case IPA_RC_SBP_OSA_CURRENT_SECOND:
1596                 case IPA_RC_SBP_IQD_CURRENT_SECOND:
1597                         rc = -EBUSY;
1598                         dev_err(&card->gdev->dev,
1599         "The device is already a secondary Bridge Port\n");
1600                         break;
1601                 case IPA_RC_SBP_OSA_LIMIT_SECOND:
1602                 case IPA_RC_SBP_IQD_LIMIT_SECOND:
1603                         rc = -EEXIST;
1604                         dev_err(&card->gdev->dev,
1605         "The LAN cannot have more secondary Bridge Ports\n");
1606                         break;
1607                 case IPA_RC_SBP_OSA_CURRENT_PRIMARY:
1608                 case IPA_RC_SBP_IQD_CURRENT_PRIMARY:
1609                         rc = -EBUSY;
1610                         dev_err(&card->gdev->dev,
1611         "The device is already a primary Bridge Port\n");
1612                         break;
1613                 case IPA_RC_SBP_OSA_NOT_AUTHD_BY_ZMAN:
1614                 case IPA_RC_SBP_IQD_NOT_AUTHD_BY_ZMAN:
1615                         rc = -EACCES;
1616                         dev_err(&card->gdev->dev,
1617         "The device is not authorized to be a Bridge Port\n");
1618                         break;
1619                 default:
1620                         rc = -EIO;
1621                 }
1622         else
1623                 switch (cbctl->ipa_rc) {
1624                 case IPA_RC_NOTSUPP:
1625                         rc = -EOPNOTSUPP;
1626                         break;
1627                 case IPA_RC_UNSUPPORTED_COMMAND:
1628                         rc = -EOPNOTSUPP;
1629                         break;
1630                 default:
1631                         rc = -EIO;
1632                 }
1633
1634         if (rc) {
1635                 QETH_CARD_TEXT_(card, 2, "SBPi%04x", cbctl->ipa_rc);
1636                 QETH_CARD_TEXT_(card, 2, "SBPc%04x", cbctl->cmd_rc);
1637         }
1638         return rc;
1639 }
1640
1641 static struct qeth_cmd_buffer *qeth_sbp_build_cmd(struct qeth_card *card,
1642                                                   enum qeth_ipa_sbp_cmd sbp_cmd,
1643                                                   unsigned int cmd_length)
1644 {
1645         enum qeth_ipa_cmds ipa_cmd = (card->info.type == QETH_CARD_TYPE_IQD) ?
1646                                         IPA_CMD_SETBRIDGEPORT_IQD :
1647                                         IPA_CMD_SETBRIDGEPORT_OSA;
1648         struct qeth_cmd_buffer *iob;
1649         struct qeth_ipa_cmd *cmd;
1650
1651         iob = qeth_get_ipacmd_buffer(card, ipa_cmd, 0);
1652         if (!iob)
1653                 return iob;
1654         cmd = __ipa_cmd(iob);
1655         cmd->data.sbp.hdr.cmdlength = sizeof(struct qeth_ipacmd_sbp_hdr) +
1656                                       cmd_length;
1657         cmd->data.sbp.hdr.command_code = sbp_cmd;
1658         cmd->data.sbp.hdr.used_total = 1;
1659         cmd->data.sbp.hdr.seq_no = 1;
1660         return iob;
1661 }
1662
1663 static int qeth_bridgeport_query_support_cb(struct qeth_card *card,
1664         struct qeth_reply *reply, unsigned long data)
1665 {
1666         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1667         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1668         QETH_CARD_TEXT(card, 2, "brqsupcb");
1669         cbctl->ipa_rc = cmd->hdr.return_code;
1670         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1671         if ((cbctl->ipa_rc == 0) && (cbctl->cmd_rc == 0)) {
1672                 cbctl->data.supported =
1673                         cmd->data.sbp.data.query_cmds_supp.supported_cmds;
1674         } else {
1675                 cbctl->data.supported = 0;
1676         }
1677         return 0;
1678 }
1679
1680 /**
1681  * qeth_bridgeport_query_support() - store bitmask of supported subfunctions.
1682  * @card:                            qeth_card structure pointer.
1683  *
1684  * Sets bitmask of supported setbridgeport subfunctions in the qeth_card
1685  * strucutre: card->options.sbp.supported_funcs.
1686  */
1687 static void qeth_bridgeport_query_support(struct qeth_card *card)
1688 {
1689         struct qeth_cmd_buffer *iob;
1690         struct _qeth_sbp_cbctl cbctl;
1691
1692         QETH_CARD_TEXT(card, 2, "brqsuppo");
1693         iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_COMMANDS_SUPPORTED,
1694                                  sizeof(struct qeth_sbp_query_cmds_supp));
1695         if (!iob)
1696                 return;
1697         if (qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_support_cb,
1698                                                         (void *)&cbctl) ||
1699             qeth_bridgeport_makerc(card, &cbctl,
1700                                         IPA_SBP_QUERY_COMMANDS_SUPPORTED)) {
1701                 /* non-zero makerc signifies failure, and produce messages */
1702                 card->options.sbp.role = QETH_SBP_ROLE_NONE;
1703                 return;
1704         }
1705         card->options.sbp.supported_funcs = cbctl.data.supported;
1706 }
1707
1708 static int qeth_bridgeport_query_ports_cb(struct qeth_card *card,
1709         struct qeth_reply *reply, unsigned long data)
1710 {
1711         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1712         struct qeth_sbp_query_ports *qports = &cmd->data.sbp.data.query_ports;
1713         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1714
1715         QETH_CARD_TEXT(card, 2, "brqprtcb");
1716         cbctl->ipa_rc = cmd->hdr.return_code;
1717         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1718         if ((cbctl->ipa_rc != 0) || (cbctl->cmd_rc != 0))
1719                 return 0;
1720         if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1721                 cbctl->cmd_rc = 0xffff;
1722                 QETH_CARD_TEXT_(card, 2, "SBPs%04x", qports->entry_length);
1723                 return 0;
1724         }
1725         /* first entry contains the state of the local port */
1726         if (qports->num_entries > 0) {
1727                 if (cbctl->data.qports.role)
1728                         *cbctl->data.qports.role = qports->entry[0].role;
1729                 if (cbctl->data.qports.state)
1730                         *cbctl->data.qports.state = qports->entry[0].state;
1731         }
1732         return 0;
1733 }
1734
1735 /**
1736  * qeth_bridgeport_query_ports() - query local bridgeport status.
1737  * @card:                          qeth_card structure pointer.
1738  * @role:   Role of the port: 0-none, 1-primary, 2-secondary.
1739  * @state:  State of the port: 0-inactive, 1-standby, 2-active.
1740  *
1741  * Returns negative errno-compatible error indication or 0 on success.
1742  *
1743  * 'role' and 'state' are not updated in case of hardware operation failure.
1744  */
1745 int qeth_bridgeport_query_ports(struct qeth_card *card,
1746         enum qeth_sbp_roles *role, enum qeth_sbp_states *state)
1747 {
1748         int rc = 0;
1749         struct qeth_cmd_buffer *iob;
1750         struct _qeth_sbp_cbctl cbctl = {
1751                 .data = {
1752                         .qports = {
1753                                 .role = role,
1754                                 .state = state,
1755                         },
1756                 },
1757         };
1758
1759         QETH_CARD_TEXT(card, 2, "brqports");
1760         if (!(card->options.sbp.supported_funcs & IPA_SBP_QUERY_BRIDGE_PORTS))
1761                 return -EOPNOTSUPP;
1762         iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_BRIDGE_PORTS, 0);
1763         if (!iob)
1764                 return -ENOMEM;
1765         rc = qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_ports_cb,
1766                                 (void *)&cbctl);
1767         if (rc < 0)
1768                 return rc;
1769         return qeth_bridgeport_makerc(card, &cbctl, IPA_SBP_QUERY_BRIDGE_PORTS);
1770 }
1771
1772 static int qeth_bridgeport_set_cb(struct qeth_card *card,
1773         struct qeth_reply *reply, unsigned long data)
1774 {
1775         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
1776         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1777         QETH_CARD_TEXT(card, 2, "brsetrcb");
1778         cbctl->ipa_rc = cmd->hdr.return_code;
1779         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1780         return 0;
1781 }
1782
1783 /**
1784  * qeth_bridgeport_setrole() - Assign primary role to the port.
1785  * @card:                      qeth_card structure pointer.
1786  * @role:                      Role to assign.
1787  *
1788  * Returns negative errno-compatible error indication or 0 on success.
1789  */
1790 int qeth_bridgeport_setrole(struct qeth_card *card, enum qeth_sbp_roles role)
1791 {
1792         int rc = 0;
1793         int cmdlength;
1794         struct qeth_cmd_buffer *iob;
1795         struct _qeth_sbp_cbctl cbctl;
1796         enum qeth_ipa_sbp_cmd setcmd;
1797
1798         QETH_CARD_TEXT(card, 2, "brsetrol");
1799         switch (role) {
1800         case QETH_SBP_ROLE_NONE:
1801                 setcmd = IPA_SBP_RESET_BRIDGE_PORT_ROLE;
1802                 cmdlength = sizeof(struct qeth_sbp_reset_role);
1803                 break;
1804         case QETH_SBP_ROLE_PRIMARY:
1805                 setcmd = IPA_SBP_SET_PRIMARY_BRIDGE_PORT;
1806                 cmdlength = sizeof(struct qeth_sbp_set_primary);
1807                 break;
1808         case QETH_SBP_ROLE_SECONDARY:
1809                 setcmd = IPA_SBP_SET_SECONDARY_BRIDGE_PORT;
1810                 cmdlength = sizeof(struct qeth_sbp_set_secondary);
1811                 break;
1812         default:
1813                 return -EINVAL;
1814         }
1815         if (!(card->options.sbp.supported_funcs & setcmd))
1816                 return -EOPNOTSUPP;
1817         iob = qeth_sbp_build_cmd(card, setcmd, cmdlength);
1818         if (!iob)
1819                 return -ENOMEM;
1820         rc = qeth_send_ipa_cmd(card, iob, qeth_bridgeport_set_cb,
1821                                 (void *)&cbctl);
1822         if (rc < 0)
1823                 return rc;
1824         return qeth_bridgeport_makerc(card, &cbctl, setcmd);
1825 }
1826
1827 /**
1828  * qeth_anset_makerc() - derive "traditional" error from hardware codes.
1829  * @card:                     qeth_card structure pointer, for debug messages.
1830  *
1831  * Returns negative errno-compatible error indication or 0 on success.
1832  */
1833 static int qeth_anset_makerc(struct qeth_card *card, int pnso_rc, u16 response)
1834 {
1835         int rc;
1836
1837         if (pnso_rc == 0)
1838                 switch (response) {
1839                 case 0x0001:
1840                         rc = 0;
1841                         break;
1842                 case 0x0004:
1843                 case 0x0100:
1844                 case 0x0106:
1845                         rc = -EOPNOTSUPP;
1846                         dev_err(&card->gdev->dev,
1847                                 "Setting address notification failed\n");
1848                         break;
1849                 case 0x0107:
1850                         rc = -EAGAIN;
1851                         break;
1852                 default:
1853                         rc = -EIO;
1854                 }
1855         else
1856                 rc = -EIO;
1857
1858         if (rc) {
1859                 QETH_CARD_TEXT_(card, 2, "SBPp%04x", pnso_rc);
1860                 QETH_CARD_TEXT_(card, 2, "SBPr%04x", response);
1861         }
1862         return rc;
1863 }
1864
1865 static void qeth_bridgeport_an_set_cb(void *priv,
1866                 enum qdio_brinfo_entry_type type, void *entry)
1867 {
1868         struct qeth_card *card = (struct qeth_card *)priv;
1869         struct qdio_brinfo_entry_l2 *l2entry;
1870         u8 code;
1871
1872         if (type != l2_addr_lnid) {
1873                 WARN_ON_ONCE(1);
1874                 return;
1875         }
1876
1877         l2entry = (struct qdio_brinfo_entry_l2 *)entry;
1878         code = IPA_ADDR_CHANGE_CODE_MACADDR;
1879         if (l2entry->addr_lnid.lnid)
1880                 code |= IPA_ADDR_CHANGE_CODE_VLANID;
1881         qeth_bridge_emit_host_event(card, anev_reg_unreg, code,
1882                 (struct net_if_token *)&l2entry->nit,
1883                 (struct mac_addr_lnid *)&l2entry->addr_lnid);
1884 }
1885
1886 /**
1887  * qeth_bridgeport_an_set() - Enable or disable bridgeport address notification
1888  * @card:                     qeth_card structure pointer.
1889  * @enable:                   0 - disable, non-zero - enable notifications
1890  *
1891  * Returns negative errno-compatible error indication or 0 on success.
1892  *
1893  * On enable, emits a series of address notifications udev events for all
1894  * currently registered hosts.
1895  */
1896 int qeth_bridgeport_an_set(struct qeth_card *card, int enable)
1897 {
1898         int rc;
1899         u16 response;
1900         struct ccw_device *ddev;
1901         struct subchannel_id schid;
1902
1903         if (!card)
1904                 return -EINVAL;
1905         if (!card->options.sbp.supported_funcs)
1906                 return -EOPNOTSUPP;
1907         ddev = CARD_DDEV(card);
1908         ccw_device_get_schid(ddev, &schid);
1909
1910         if (enable) {
1911                 qeth_bridge_emit_host_event(card, anev_reset, 0, NULL, NULL);
1912                 rc = qdio_pnso_brinfo(schid, 1, &response,
1913                         qeth_bridgeport_an_set_cb, card);
1914         } else
1915                 rc = qdio_pnso_brinfo(schid, 0, &response, NULL, NULL);
1916         return qeth_anset_makerc(card, rc, response);
1917 }
1918
1919 static bool qeth_bridgeport_is_in_use(struct qeth_card *card)
1920 {
1921         return (card->options.sbp.role || card->options.sbp.reflect_promisc ||
1922                 card->options.sbp.hostnotification);
1923 }
1924
1925 /* VNIC Characteristics support */
1926
1927 /* handle VNICC IPA command return codes; convert to error codes */
1928 static int qeth_l2_vnicc_makerc(struct qeth_card *card, int ipa_rc)
1929 {
1930         int rc;
1931
1932         switch (ipa_rc) {
1933         case IPA_RC_SUCCESS:
1934                 return ipa_rc;
1935         case IPA_RC_L2_UNSUPPORTED_CMD:
1936         case IPA_RC_NOTSUPP:
1937                 rc = -EOPNOTSUPP;
1938                 break;
1939         case IPA_RC_VNICC_OOSEQ:
1940                 rc = -EALREADY;
1941                 break;
1942         case IPA_RC_VNICC_VNICBP:
1943                 rc = -EBUSY;
1944                 break;
1945         case IPA_RC_L2_ADDR_TABLE_FULL:
1946                 rc = -ENOSPC;
1947                 break;
1948         case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
1949                 rc = -EACCES;
1950                 break;
1951         default:
1952                 rc = -EIO;
1953         }
1954
1955         QETH_CARD_TEXT_(card, 2, "err%04x", ipa_rc);
1956         return rc;
1957 }
1958
1959 /* generic VNICC request call back control */
1960 struct _qeth_l2_vnicc_request_cbctl {
1961         u32 sub_cmd;
1962         struct {
1963                 u32 vnic_char;
1964                 u32 timeout;
1965         } param;
1966         struct {
1967                 union{
1968                         u32 *sup_cmds;
1969                         u32 *timeout;
1970                 };
1971         } result;
1972 };
1973
1974 /* generic VNICC request call back */
1975 static int qeth_l2_vnicc_request_cb(struct qeth_card *card,
1976                                     struct qeth_reply *reply,
1977                                     unsigned long data)
1978 {
1979         struct _qeth_l2_vnicc_request_cbctl *cbctl =
1980                 (struct _qeth_l2_vnicc_request_cbctl *) reply->param;
1981         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1982         struct qeth_ipacmd_vnicc *rep = &cmd->data.vnicc;
1983
1984         QETH_CARD_TEXT(card, 2, "vniccrcb");
1985         if (cmd->hdr.return_code)
1986                 return 0;
1987         /* return results to caller */
1988         card->options.vnicc.sup_chars = rep->hdr.sup;
1989         card->options.vnicc.cur_chars = rep->hdr.cur;
1990
1991         if (cbctl->sub_cmd == IPA_VNICC_QUERY_CMDS)
1992                 *cbctl->result.sup_cmds = rep->query_cmds.sup_cmds;
1993
1994         if (cbctl->sub_cmd == IPA_VNICC_GET_TIMEOUT)
1995                 *cbctl->result.timeout = rep->getset_timeout.timeout;
1996
1997         return 0;
1998 }
1999
2000 /* generic VNICC request */
2001 static int qeth_l2_vnicc_request(struct qeth_card *card,
2002                                  struct _qeth_l2_vnicc_request_cbctl *cbctl)
2003 {
2004         struct qeth_ipacmd_vnicc *req;
2005         struct qeth_cmd_buffer *iob;
2006         struct qeth_ipa_cmd *cmd;
2007         int rc;
2008
2009         QETH_CARD_TEXT(card, 2, "vniccreq");
2010
2011         /* get new buffer for request */
2012         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_VNICC, 0);
2013         if (!iob)
2014                 return -ENOMEM;
2015
2016         /* create header for request */
2017         cmd = __ipa_cmd(iob);
2018         req = &cmd->data.vnicc;
2019
2020         /* create sub command header for request */
2021         req->sub_hdr.data_length = sizeof(req->sub_hdr);
2022         req->sub_hdr.sub_command = cbctl->sub_cmd;
2023
2024         /* create sub command specific request fields */
2025         switch (cbctl->sub_cmd) {
2026         case IPA_VNICC_QUERY_CHARS:
2027                 break;
2028         case IPA_VNICC_QUERY_CMDS:
2029                 req->sub_hdr.data_length += sizeof(req->query_cmds);
2030                 req->query_cmds.vnic_char = cbctl->param.vnic_char;
2031                 break;
2032         case IPA_VNICC_ENABLE:
2033         case IPA_VNICC_DISABLE:
2034                 req->sub_hdr.data_length += sizeof(req->set_char);
2035                 req->set_char.vnic_char = cbctl->param.vnic_char;
2036                 break;
2037         case IPA_VNICC_SET_TIMEOUT:
2038                 req->getset_timeout.timeout = cbctl->param.timeout;
2039                 /* fallthrough */
2040         case IPA_VNICC_GET_TIMEOUT:
2041                 req->sub_hdr.data_length += sizeof(req->getset_timeout);
2042                 req->getset_timeout.vnic_char = cbctl->param.vnic_char;
2043                 break;
2044         default:
2045                 qeth_release_buffer(iob->channel, iob);
2046                 return -EOPNOTSUPP;
2047         }
2048
2049         /* send request */
2050         rc = qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb,
2051                                (void *) cbctl);
2052
2053         return qeth_l2_vnicc_makerc(card, rc);
2054 }
2055
2056 /* VNICC query VNIC characteristics request */
2057 static int qeth_l2_vnicc_query_chars(struct qeth_card *card)
2058 {
2059         struct _qeth_l2_vnicc_request_cbctl cbctl;
2060
2061         /* prepare callback control */
2062         cbctl.sub_cmd = IPA_VNICC_QUERY_CHARS;
2063
2064         QETH_CARD_TEXT(card, 2, "vniccqch");
2065         return qeth_l2_vnicc_request(card, &cbctl);
2066 }
2067
2068 /* VNICC query sub commands request */
2069 static int qeth_l2_vnicc_query_cmds(struct qeth_card *card, u32 vnic_char,
2070                                     u32 *sup_cmds)
2071 {
2072         struct _qeth_l2_vnicc_request_cbctl cbctl;
2073
2074         /* prepare callback control */
2075         cbctl.sub_cmd = IPA_VNICC_QUERY_CMDS;
2076         cbctl.param.vnic_char = vnic_char;
2077         cbctl.result.sup_cmds = sup_cmds;
2078
2079         QETH_CARD_TEXT(card, 2, "vniccqcm");
2080         return qeth_l2_vnicc_request(card, &cbctl);
2081 }
2082
2083 /* VNICC enable/disable characteristic request */
2084 static int qeth_l2_vnicc_set_char(struct qeth_card *card, u32 vnic_char,
2085                                       u32 cmd)
2086 {
2087         struct _qeth_l2_vnicc_request_cbctl cbctl;
2088
2089         /* prepare callback control */
2090         cbctl.sub_cmd = cmd;
2091         cbctl.param.vnic_char = vnic_char;
2092
2093         QETH_CARD_TEXT(card, 2, "vniccedc");
2094         return qeth_l2_vnicc_request(card, &cbctl);
2095 }
2096
2097 /* VNICC get/set timeout for characteristic request */
2098 static int qeth_l2_vnicc_getset_timeout(struct qeth_card *card, u32 vnicc,
2099                                         u32 cmd, u32 *timeout)
2100 {
2101         struct _qeth_l2_vnicc_request_cbctl cbctl;
2102
2103         /* prepare callback control */
2104         cbctl.sub_cmd = cmd;
2105         cbctl.param.vnic_char = vnicc;
2106         if (cmd == IPA_VNICC_SET_TIMEOUT)
2107                 cbctl.param.timeout = *timeout;
2108         if (cmd == IPA_VNICC_GET_TIMEOUT)
2109                 cbctl.result.timeout = timeout;
2110
2111         QETH_CARD_TEXT(card, 2, "vniccgst");
2112         return qeth_l2_vnicc_request(card, &cbctl);
2113 }
2114
2115 /* set current VNICC flag state; called from sysfs store function */
2116 int qeth_l2_vnicc_set_state(struct qeth_card *card, u32 vnicc, bool state)
2117 {
2118         int rc = 0;
2119         u32 cmd;
2120
2121         QETH_CARD_TEXT(card, 2, "vniccsch");
2122
2123         /* do not change anything if BridgePort is enabled */
2124         if (qeth_bridgeport_is_in_use(card))
2125                 return -EBUSY;
2126
2127         /* check if characteristic and enable/disable are supported */
2128         if (!(card->options.vnicc.sup_chars & vnicc) ||
2129             !(card->options.vnicc.set_char_sup & vnicc))
2130                 return -EOPNOTSUPP;
2131
2132         /* set enable/disable command and store wanted characteristic */
2133         if (state) {
2134                 cmd = IPA_VNICC_ENABLE;
2135                 card->options.vnicc.wanted_chars |= vnicc;
2136         } else {
2137                 cmd = IPA_VNICC_DISABLE;
2138                 card->options.vnicc.wanted_chars &= ~vnicc;
2139         }
2140
2141         /* do we need to do anything? */
2142         if (card->options.vnicc.cur_chars == card->options.vnicc.wanted_chars)
2143                 return rc;
2144
2145         /* if card is not ready, simply stop here */
2146         if (!qeth_card_hw_is_reachable(card)) {
2147                 if (state)
2148                         card->options.vnicc.cur_chars |= vnicc;
2149                 else
2150                         card->options.vnicc.cur_chars &= ~vnicc;
2151                 return rc;
2152         }
2153
2154         rc = qeth_l2_vnicc_set_char(card, vnicc, cmd);
2155         if (rc)
2156                 card->options.vnicc.wanted_chars =
2157                         card->options.vnicc.cur_chars;
2158         else {
2159                 /* successful online VNICC change; handle special cases */
2160                 if (state && vnicc == QETH_VNICC_RX_BCAST)
2161                         card->options.vnicc.rx_bcast_enabled = true;
2162                 if (!state && vnicc == QETH_VNICC_LEARNING)
2163                         qeth_l2_vnicc_recover_timeout(card, vnicc,
2164                                         &card->options.vnicc.learning_timeout);
2165         }
2166
2167         return rc;
2168 }
2169
2170 /* get current VNICC flag state; called from sysfs show function */
2171 int qeth_l2_vnicc_get_state(struct qeth_card *card, u32 vnicc, bool *state)
2172 {
2173         int rc = 0;
2174
2175         QETH_CARD_TEXT(card, 2, "vniccgch");
2176
2177         /* do not get anything if BridgePort is enabled */
2178         if (qeth_bridgeport_is_in_use(card))
2179                 return -EBUSY;
2180
2181         /* check if characteristic is supported */
2182         if (!(card->options.vnicc.sup_chars & vnicc))
2183                 return -EOPNOTSUPP;
2184
2185         /* if card is ready, query current VNICC state */
2186         if (qeth_card_hw_is_reachable(card))
2187                 rc = qeth_l2_vnicc_query_chars(card);
2188
2189         *state = (card->options.vnicc.cur_chars & vnicc) ? true : false;
2190         return rc;
2191 }
2192
2193 /* set VNICC timeout; called from sysfs store function. Currently, only learning
2194  * supports timeout
2195  */
2196 int qeth_l2_vnicc_set_timeout(struct qeth_card *card, u32 timeout)
2197 {
2198         int rc = 0;
2199
2200         QETH_CARD_TEXT(card, 2, "vniccsto");
2201
2202         /* do not change anything if BridgePort is enabled */
2203         if (qeth_bridgeport_is_in_use(card))
2204                 return -EBUSY;
2205
2206         /* check if characteristic and set_timeout are supported */
2207         if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
2208             !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
2209                 return -EOPNOTSUPP;
2210
2211         /* do we need to do anything? */
2212         if (card->options.vnicc.learning_timeout == timeout)
2213                 return rc;
2214
2215         /* if card is not ready, simply store the value internally and return */
2216         if (!qeth_card_hw_is_reachable(card)) {
2217                 card->options.vnicc.learning_timeout = timeout;
2218                 return rc;
2219         }
2220
2221         /* send timeout value to card; if successful, store value internally */
2222         rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
2223                                           IPA_VNICC_SET_TIMEOUT, &timeout);
2224         if (!rc)
2225                 card->options.vnicc.learning_timeout = timeout;
2226
2227         return rc;
2228 }
2229
2230 /* get current VNICC timeout; called from sysfs show function. Currently, only
2231  * learning supports timeout
2232  */
2233 int qeth_l2_vnicc_get_timeout(struct qeth_card *card, u32 *timeout)
2234 {
2235         int rc = 0;
2236
2237         QETH_CARD_TEXT(card, 2, "vniccgto");
2238
2239         /* do not get anything if BridgePort is enabled */
2240         if (qeth_bridgeport_is_in_use(card))
2241                 return -EBUSY;
2242
2243         /* check if characteristic and get_timeout are supported */
2244         if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
2245             !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
2246                 return -EOPNOTSUPP;
2247         /* if card is ready, get timeout. Otherwise, just return stored value */
2248         *timeout = card->options.vnicc.learning_timeout;
2249         if (qeth_card_hw_is_reachable(card))
2250                 rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
2251                                                   IPA_VNICC_GET_TIMEOUT,
2252                                                   timeout);
2253
2254         return rc;
2255 }
2256
2257 /* check if VNICC is currently enabled */
2258 bool qeth_l2_vnicc_is_in_use(struct qeth_card *card)
2259 {
2260         /* if everything is turned off, VNICC is not active */
2261         if (!card->options.vnicc.cur_chars)
2262                 return false;
2263         /* default values are only OK if rx_bcast was not enabled by user
2264          * or the card is offline.
2265          */
2266         if (card->options.vnicc.cur_chars == QETH_VNICC_DEFAULT) {
2267                 if (!card->options.vnicc.rx_bcast_enabled ||
2268                     !qeth_card_hw_is_reachable(card))
2269                         return false;
2270         }
2271         return true;
2272 }
2273
2274 /* recover user timeout setting */
2275 static bool qeth_l2_vnicc_recover_timeout(struct qeth_card *card, u32 vnicc,
2276                                           u32 *timeout)
2277 {
2278         if (card->options.vnicc.sup_chars & vnicc &&
2279             card->options.vnicc.getset_timeout_sup & vnicc &&
2280             !qeth_l2_vnicc_getset_timeout(card, vnicc, IPA_VNICC_SET_TIMEOUT,
2281                                           timeout))
2282                 return false;
2283         *timeout = QETH_VNICC_DEFAULT_TIMEOUT;
2284         return true;
2285 }
2286
2287 /* recover user characteristic setting */
2288 static bool qeth_l2_vnicc_recover_char(struct qeth_card *card, u32 vnicc,
2289                                        bool enable)
2290 {
2291         u32 cmd = enable ? IPA_VNICC_ENABLE : IPA_VNICC_DISABLE;
2292
2293         if (card->options.vnicc.sup_chars & vnicc &&
2294             card->options.vnicc.set_char_sup & vnicc &&
2295             !qeth_l2_vnicc_set_char(card, vnicc, cmd))
2296                 return false;
2297         card->options.vnicc.wanted_chars &= ~vnicc;
2298         card->options.vnicc.wanted_chars |= QETH_VNICC_DEFAULT & vnicc;
2299         return true;
2300 }
2301
2302 /* (re-)initialize VNICC */
2303 static void qeth_l2_vnicc_init(struct qeth_card *card)
2304 {
2305         u32 *timeout = &card->options.vnicc.learning_timeout;
2306         unsigned int chars_len, i;
2307         unsigned long chars_tmp;
2308         u32 sup_cmds, vnicc;
2309         bool enable, error;
2310
2311         QETH_CARD_TEXT(card, 2, "vniccini");
2312         /* reset rx_bcast */
2313         card->options.vnicc.rx_bcast_enabled = 0;
2314         /* initial query and storage of VNIC characteristics */
2315         if (qeth_l2_vnicc_query_chars(card)) {
2316                 if (card->options.vnicc.wanted_chars != QETH_VNICC_DEFAULT ||
2317                     *timeout != QETH_VNICC_DEFAULT_TIMEOUT)
2318                         dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
2319                 /* fail quietly if user didn't change the default config */
2320                 card->options.vnicc.sup_chars = 0;
2321                 card->options.vnicc.cur_chars = 0;
2322                 card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
2323                 return;
2324         }
2325         /* get supported commands for each supported characteristic */
2326         chars_tmp = card->options.vnicc.sup_chars;
2327         chars_len = sizeof(card->options.vnicc.sup_chars) * BITS_PER_BYTE;
2328         for_each_set_bit(i, &chars_tmp, chars_len) {
2329                 vnicc = BIT(i);
2330                 qeth_l2_vnicc_query_cmds(card, vnicc, &sup_cmds);
2331                 if (!(sup_cmds & IPA_VNICC_SET_TIMEOUT) ||
2332                     !(sup_cmds & IPA_VNICC_GET_TIMEOUT))
2333                         card->options.vnicc.getset_timeout_sup &= ~vnicc;
2334                 if (!(sup_cmds & IPA_VNICC_ENABLE) ||
2335                     !(sup_cmds & IPA_VNICC_DISABLE))
2336                         card->options.vnicc.set_char_sup &= ~vnicc;
2337         }
2338         /* enforce assumed default values and recover settings, if changed  */
2339         error = qeth_l2_vnicc_recover_timeout(card, QETH_VNICC_LEARNING,
2340                                               timeout);
2341         chars_tmp = card->options.vnicc.wanted_chars ^ QETH_VNICC_DEFAULT;
2342         chars_tmp |= QETH_VNICC_BRIDGE_INVISIBLE;
2343         chars_len = sizeof(card->options.vnicc.wanted_chars) * BITS_PER_BYTE;
2344         for_each_set_bit(i, &chars_tmp, chars_len) {
2345                 vnicc = BIT(i);
2346                 enable = card->options.vnicc.wanted_chars & vnicc;
2347                 error |= qeth_l2_vnicc_recover_char(card, vnicc, enable);
2348         }
2349         if (error)
2350                 dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
2351 }
2352
2353 /* configure default values of VNIC characteristics */
2354 static void qeth_l2_vnicc_set_defaults(struct qeth_card *card)
2355 {
2356         /* characteristics values */
2357         card->options.vnicc.sup_chars = QETH_VNICC_ALL;
2358         card->options.vnicc.cur_chars = QETH_VNICC_DEFAULT;
2359         card->options.vnicc.learning_timeout = QETH_VNICC_DEFAULT_TIMEOUT;
2360         /* supported commands */
2361         card->options.vnicc.set_char_sup = QETH_VNICC_ALL;
2362         card->options.vnicc.getset_timeout_sup = QETH_VNICC_LEARNING;
2363         /* settings wanted by users */
2364         card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
2365 }
2366
2367 module_init(qeth_l2_init);
2368 module_exit(qeth_l2_exit);
2369 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
2370 MODULE_DESCRIPTION("qeth layer 2 discipline");
2371 MODULE_LICENSE("GPL");