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_hdr *hdr, struct sk_buff *skb,
 197                                 int cast_type, unsigned int data_len)
 198 {
 199         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
 200
 201         memset(hdr, 0, sizeof(struct qeth_hdr));
 202         hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
 203         hdr->hdr.l2.pkt_length = data_len;
 204
 205         /* set byte byte 3 to casting flags */
 206         if (cast_type == RTN_MULTICAST)
 207                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 208         else if (cast_type == RTN_BROADCAST)
 209                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 210         else
 211                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 212
 213         /* VSWITCH relies on the VLAN
 214          * information to be present in
 215          * the QDIO header */
 216         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
 217                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
 218                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
 219         }
 220 }
 221
 222 static int qeth_setdelvlan_makerc(struct qeth_card *card, int retcode)
 223 {
 224         if (retcode)
 225                 QETH_CARD_TEXT_(card, 2, "err%04x", retcode);
 226
 227         switch (retcode) {
 228         case IPA_RC_SUCCESS:
 229                 return 0;
 230         case IPA_RC_L2_INVALID_VLAN_ID:
 231                 return -EINVAL;
 232         case IPA_RC_L2_DUP_VLAN_ID:
 233                 return -EEXIST;
 234         case IPA_RC_L2_VLAN_ID_NOT_FOUND:
 235                 return -ENOENT;
 236         case IPA_RC_L2_VLAN_ID_NOT_ALLOWED:
 237                 return -EPERM;
 238         case -ENOMEM:
 239                 return -ENOMEM;
 240         default:
 241                 return -EIO;
 242         }
 243 }
 244
 245 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
 246                                       struct qeth_reply *reply,
 247                                       unsigned long data)
 248 {
 249         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
 250
 251         QETH_CARD_TEXT(card, 2, "L2sdvcb");
 252         if (cmd->hdr.return_code) {
 253                 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x.\n",
 254                                  cmd->data.setdelvlan.vlan_id,
 255                                  QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 256                 QETH_CARD_TEXT_(card, 2, "L2VL%4x", cmd->hdr.command);
 257                 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code);
 258         }
 259         return 0;
 260 }
 261
 262 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
 263                                    enum qeth_ipa_cmds ipacmd)
 264 {
 265         struct qeth_ipa_cmd *cmd;
 266         struct qeth_cmd_buffer *iob;
 267
 268         QETH_CARD_TEXT_(card, 4, "L2sdv%x", ipacmd);
 269         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 270         if (!iob)
 271                 return -ENOMEM;
 272         cmd = __ipa_cmd(iob);
 273         cmd->data.setdelvlan.vlan_id = i;
 274         return qeth_setdelvlan_makerc(card, qeth_send_ipa_cmd(card, iob,
 275                                             qeth_l2_send_setdelvlan_cb, NULL));
 276 }
 277
 278 static void qeth_l2_process_vlans(struct qeth_card *card)
 279 {
 280         struct qeth_vlan_vid *id;
 281
 282         QETH_CARD_TEXT(card, 3, "L2prcvln");
 283         mutex_lock(&card->vid_list_mutex);
 284         list_for_each_entry(id, &card->vid_list, list) {
 285                 qeth_l2_send_setdelvlan(card, id->vid, IPA_CMD_SETVLAN);
 286         }
 287         mutex_unlock(&card->vid_list_mutex);
 288 }
 289
 290 static int qeth_l2_vlan_rx_add_vid(struct net_device *dev,
 291                                    __be16 proto, u16 vid)
 292 {
 293         struct qeth_card *card = dev->ml_priv;
 294         struct qeth_vlan_vid *id;
 295         int rc;
 296
 297         QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
 298         if (!vid)
 299                 return 0;
 300         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 301                 QETH_CARD_TEXT(card, 3, "aidREC");
 302                 return 0;
 303         }
 304         id = kmalloc(sizeof(*id), GFP_KERNEL);
 305         if (id) {
 306                 id->vid = vid;
 307                 rc = qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
 308                 if (rc) {
 309                         kfree(id);
 310                         return rc;
 311                 }
 312                 mutex_lock(&card->vid_list_mutex);
 313                 list_add_tail(&id->list, &card->vid_list);
 314                 mutex_unlock(&card->vid_list_mutex);
 315         } else {
 316                 return -ENOMEM;
 317         }
 318         return 0;
 319 }
 320
 321 static int qeth_l2_vlan_rx_kill_vid(struct net_device *dev,
 322                                     __be16 proto, u16 vid)
 323 {
 324         struct qeth_vlan_vid *id, *tmpid = NULL;
 325         struct qeth_card *card = dev->ml_priv;
 326         int rc = 0;
 327
 328         QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
 329         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 330                 QETH_CARD_TEXT(card, 3, "kidREC");
 331                 return 0;
 332         }
 333         mutex_lock(&card->vid_list_mutex);
 334         list_for_each_entry(id, &card->vid_list, list) {
 335                 if (id->vid == vid) {
 336                         list_del(&id->list);
 337                         tmpid = id;
 338                         break;
 339                 }
 340         }
 341         mutex_unlock(&card->vid_list_mutex);
 342         if (tmpid) {
 343                 rc = qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 344                 kfree(tmpid);
 345         }
 346         return rc;
 347 }
 348
 349 static void qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
 350 {
 351         QETH_DBF_TEXT(SETUP , 2, "stopcard");
 352         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 353
 354         qeth_set_allowed_threads(card, 0, 1);
 355         if (card->read.state == CH_STATE_UP &&
 356             card->write.state == CH_STATE_UP &&
 357             (card->state == CARD_STATE_UP)) {
 358                 if (recovery_mode &&
 359                     card->info.type != QETH_CARD_TYPE_OSN) {
 360                         qeth_l2_stop(card->dev);
 361                 } else {
 362                         rtnl_lock();
 363                         dev_close(card->dev);
 364                         rtnl_unlock();
 365                 }
 366                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 367                 card->state = CARD_STATE_SOFTSETUP;
 368         }
 369         if (card->state == CARD_STATE_SOFTSETUP) {
 370                 qeth_l2_del_all_macs(card);
 371                 qeth_clear_ipacmd_list(card);
 372                 card->state = CARD_STATE_HARDSETUP;
 373         }
 374         if (card->state == CARD_STATE_HARDSETUP) {
 375                 qeth_qdio_clear_card(card, 0);
 376                 qeth_clear_qdio_buffers(card);
 377                 qeth_clear_working_pool_list(card);
 378                 card->state = CARD_STATE_DOWN;
 379         }
 380         if (card->state == CARD_STATE_DOWN) {
 381                 qeth_clear_cmd_buffers(&card->read);
 382                 qeth_clear_cmd_buffers(&card->write);
 383         }
 384 }
 385
 386 static int qeth_l2_process_inbound_buffer(struct qeth_card *card,
 387                                 int budget, int *done)
 388 {
 389         int work_done = 0;
 390         struct sk_buff *skb;
 391         struct qeth_hdr *hdr;
 392         unsigned int len;
 393
 394         *done = 0;
 395         WARN_ON_ONCE(!budget);
 396         while (budget) {
 397                 skb = qeth_core_get_next_skb(card,
 398                         &card->qdio.in_q->bufs[card->rx.b_index],
 399                         &card->rx.b_element, &card->rx.e_offset, &hdr);
 400                 if (!skb) {
 401                         *done = 1;
 402                         break;
 403                 }
 404                 switch (hdr->hdr.l2.id) {
 405                 case QETH_HEADER_TYPE_LAYER2:
 406                         skb->protocol = eth_type_trans(skb, skb->dev);
 407                         qeth_rx_csum(card, skb, hdr->hdr.l2.flags[1]);
 408                         if (skb->protocol == htons(ETH_P_802_2))
 409                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
 410                         len = skb->len;
 411                         napi_gro_receive(&card->napi, skb);
 412                         break;
 413                 case QETH_HEADER_TYPE_OSN:
 414                         if (card->info.type == QETH_CARD_TYPE_OSN) {
 415                                 skb_push(skb, sizeof(struct qeth_hdr));
 416                                 skb_copy_to_linear_data(skb, hdr,
 417                                                 sizeof(struct qeth_hdr));
 418                                 len = skb->len;
 419                                 card->osn_info.data_cb(skb);
 420                                 break;
 421                         }
 422                         /* else unknown */
 423                 default:
 424                         dev_kfree_skb_any(skb);
 425                         QETH_CARD_TEXT(card, 3, "inbunkno");
 426                         QETH_DBF_HEX(CTRL, 3, hdr, sizeof(*hdr));
 427                         continue;
 428                 }
 429                 work_done++;
 430                 budget--;
 431                 card->stats.rx_packets++;
 432                 card->stats.rx_bytes += len;
 433         }
 434         return work_done;
 435 }
 436
 437 static int qeth_l2_request_initial_mac(struct qeth_card *card)
 438 {
 439         int rc = 0;
 440
 441         QETH_DBF_TEXT(SETUP, 2, "l2reqmac");
 442         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
 443
 444         if (MACHINE_IS_VM) {
 445                 rc = qeth_vm_request_mac(card);
 446                 if (!rc)
 447                         goto out;
 448                 QETH_DBF_MESSAGE(2, "z/VM MAC Service failed on device %s: x%x\n",
 449                                  CARD_BUS_ID(card), rc);
 450                 QETH_DBF_TEXT_(SETUP, 2, "err%04x", rc);
 451                 /* fall back to alternative mechanism: */
 452         }
 453
 454         if (card->info.type == QETH_CARD_TYPE_IQD ||
 455             card->info.type == QETH_CARD_TYPE_OSM ||
 456             card->info.type == QETH_CARD_TYPE_OSX ||
 457             card->info.guestlan) {
 458                 rc = qeth_setadpparms_change_macaddr(card);
 459                 if (!rc)
 460                         goto out;
 461                 QETH_DBF_MESSAGE(2, "READ_MAC Assist failed on device %s: x%x\n",
 462                                  CARD_BUS_ID(card), rc);
 463                 QETH_DBF_TEXT_(SETUP, 2, "1err%04x", rc);
 464                 /* fall back once more: */
 465         }
 466
 467         /* some devices don't support a custom MAC address: */
 468         if (card->info.type == QETH_CARD_TYPE_OSM ||
 469             card->info.type == QETH_CARD_TYPE_OSX)
 470                 return (rc) ? rc : -EADDRNOTAVAIL;
 471         eth_hw_addr_random(card->dev);
 472
 473 out:
 474         QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, card->dev->addr_len);
 475         return 0;
 476 }
 477
 478 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 479 {
 480         struct sockaddr *addr = p;
 481         struct qeth_card *card = dev->ml_priv;
 482         u8 old_addr[ETH_ALEN];
 483         int rc = 0;
 484
 485         QETH_CARD_TEXT(card, 3, "setmac");
 486
 487         if (card->info.type == QETH_CARD_TYPE_OSN ||
 488             card->info.type == QETH_CARD_TYPE_OSM ||
 489             card->info.type == QETH_CARD_TYPE_OSX) {
 490                 QETH_CARD_TEXT(card, 3, "setmcTYP");
 491                 return -EOPNOTSUPP;
 492         }
 493         QETH_CARD_HEX(card, 3, addr->sa_data, ETH_ALEN);
 494         if (!is_valid_ether_addr(addr->sa_data))
 495                 return -EADDRNOTAVAIL;
 496
 497         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 498                 QETH_CARD_TEXT(card, 3, "setmcREC");
 499                 return -ERESTARTSYS;
 500         }
 501
 502         /* avoid racing against concurrent state change: */
 503         if (!mutex_trylock(&card->conf_mutex))
 504                 return -EAGAIN;
 505
 506         if (!qeth_card_hw_is_reachable(card)) {
 507                 ether_addr_copy(dev->dev_addr, addr->sa_data);
 508                 goto out_unlock;
 509         }
 510
 511         /* don't register the same address twice */
 512         if (ether_addr_equal_64bits(dev->dev_addr, addr->sa_data) &&
 513             (card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
 514                 goto out_unlock;
 515
 516         /* add the new address, switch over, drop the old */
 517         rc = qeth_l2_send_setmac(card, addr->sa_data);
 518         if (rc)
 519                 goto out_unlock;
 520         ether_addr_copy(old_addr, dev->dev_addr);
 521         ether_addr_copy(dev->dev_addr, addr->sa_data);
 522
 523         if (card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED)
 524                 qeth_l2_remove_mac(card, old_addr);
 525         card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 526
 527 out_unlock:
 528         mutex_unlock(&card->conf_mutex);
 529         return rc;
 530 }
 531
 532 static void qeth_promisc_to_bridge(struct qeth_card *card)
 533 {
 534         struct net_device *dev = card->dev;
 535         enum qeth_ipa_promisc_modes promisc_mode;
 536         int role;
 537         int rc;
 538
 539         QETH_CARD_TEXT(card, 3, "pmisc2br");
 540
 541         if (!card->options.sbp.reflect_promisc)
 542                 return;
 543         promisc_mode = (dev->flags & IFF_PROMISC) ? SET_PROMISC_MODE_ON
 544                                                 : SET_PROMISC_MODE_OFF;
 545         if (promisc_mode == card->info.promisc_mode)
 546                 return;
 547
 548         if (promisc_mode == SET_PROMISC_MODE_ON) {
 549                 if (card->options.sbp.reflect_promisc_primary)
 550                         role = QETH_SBP_ROLE_PRIMARY;
 551                 else
 552                         role = QETH_SBP_ROLE_SECONDARY;
 553         } else
 554                 role = QETH_SBP_ROLE_NONE;
 555
 556         rc = qeth_bridgeport_setrole(card, role);
 557         QETH_DBF_TEXT_(SETUP, 2, "bpm%c%04x",
 558                         (promisc_mode == SET_PROMISC_MODE_ON) ? '+' : '-', rc);
 559         if (!rc) {
 560                 card->options.sbp.role = role;
 561                 card->info.promisc_mode = promisc_mode;
 562         }
 563
 564 }
 565 /* New MAC address is added to the hash table and marked to be written on card
 566  * only if there is not in the hash table storage already
 567  *
 568 */
 569 static void qeth_l2_add_mac(struct qeth_card *card, struct netdev_hw_addr *ha)
 570 {
 571         u32 mac_hash = get_unaligned((u32 *)(&ha->addr[2]));
 572         struct qeth_mac *mac;
 573
 574         hash_for_each_possible(card->mac_htable, mac, hnode, mac_hash) {
 575                 if (ether_addr_equal_64bits(ha->addr, mac->mac_addr)) {
 576                         mac->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
 577                         return;
 578                 }
 579         }
 580
 581         mac = kzalloc(sizeof(struct qeth_mac), GFP_ATOMIC);
 582         if (!mac)
 583                 return;
 584
 585         ether_addr_copy(mac->mac_addr, ha->addr);
 586         mac->disp_flag = QETH_DISP_ADDR_ADD;
 587
 588         hash_add(card->mac_htable, &mac->hnode, mac_hash);
 589 }
 590
 591 static void qeth_l2_set_rx_mode(struct net_device *dev)
 592 {
 593         struct qeth_card *card = dev->ml_priv;
 594         struct netdev_hw_addr *ha;
 595         struct qeth_mac *mac;
 596         struct hlist_node *tmp;
 597         int i;
 598         int rc;
 599
 600         if (card->info.type == QETH_CARD_TYPE_OSN)
 601                 return;
 602
 603         QETH_CARD_TEXT(card, 3, "setmulti");
 604         if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
 605             (card->state != CARD_STATE_UP))
 606                 return;
 607
 608         spin_lock_bh(&card->mclock);
 609
 610         netdev_for_each_mc_addr(ha, dev)
 611                 qeth_l2_add_mac(card, ha);
 612         netdev_for_each_uc_addr(ha, dev)
 613                 qeth_l2_add_mac(card, ha);
 614
 615         hash_for_each_safe(card->mac_htable, i, tmp, mac, hnode) {
 616                 switch (mac->disp_flag) {
 617                 case QETH_DISP_ADDR_DELETE:
 618                         qeth_l2_remove_mac(card, mac->mac_addr);
 619                         hash_del(&mac->hnode);
 620                         kfree(mac);
 621                         break;
 622                 case QETH_DISP_ADDR_ADD:
 623                         rc = qeth_l2_write_mac(card, mac->mac_addr);
 624                         if (rc) {
 625                                 hash_del(&mac->hnode);
 626                                 kfree(mac);
 627                                 break;
 628                         }
 629                         /* fall through */
 630                 default:
 631                         /* for next call to set_rx_mode(): */
 632                         mac->disp_flag = QETH_DISP_ADDR_DELETE;
 633                 }
 634         }
 635
 636         spin_unlock_bh(&card->mclock);
 637
 638         if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
 639                 qeth_setadp_promisc_mode(card);
 640         else
 641                 qeth_promisc_to_bridge(card);
 642 }
 643
 644 static int qeth_l2_xmit(struct qeth_card *card, struct sk_buff *skb,
 645                         struct qeth_qdio_out_q *queue, int cast_type, int ipv)
 646 {
 647         const unsigned int proto_len = IS_IQD(card) ? ETH_HLEN : 0;
 648         const unsigned int hw_hdr_len = sizeof(struct qeth_hdr);
 649         unsigned int frame_len = skb->len;
 650         unsigned int data_offset = 0;
 651         struct qeth_hdr *hdr = NULL;
 652         unsigned int hd_len = 0;
 653         unsigned int elements;
 654         int push_len, rc;
 655         bool is_sg;
 656
 657         rc = skb_cow_head(skb, hw_hdr_len);
 658         if (rc)
 659                 return rc;
 660
 661         push_len = qeth_add_hw_header(card, skb, &hdr, hw_hdr_len, proto_len,
 662                                       &elements);
 663         if (push_len < 0)
 664                 return push_len;
 665         if (!push_len) {
 666                 /* HW header needs its own buffer element. */
 667                 hd_len = hw_hdr_len + proto_len;
 668                 data_offset = proto_len;
 669         }
 670         qeth_l2_fill_header(hdr, skb, cast_type, frame_len);
 671         if (skb->ip_summed == CHECKSUM_PARTIAL) {
 672                 qeth_tx_csum(skb, &hdr->hdr.l2.flags[1], ipv);
 673                 if (card->options.performance_stats)
 674                         card->perf_stats.tx_csum++;
 675         }
 676
 677         is_sg = skb_is_nonlinear(skb);
 678         if (IS_IQD(card)) {
 679                 rc = qeth_do_send_packet_fast(queue, skb, hdr, data_offset,
 680                                               hd_len);
 681         } else {
 682                 /* TODO: drop skb_orphan() once TX completion is fast enough */
 683                 skb_orphan(skb);
 684                 rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset,
 685                                          hd_len, elements);
 686         }
 687
 688         if (!rc) {
 689                 if (card->options.performance_stats) {
 690                         card->perf_stats.buf_elements_sent += elements;
 691                         if (is_sg)
 692                                 card->perf_stats.sg_skbs_sent++;
 693                 }
 694         } else {
 695                 if (!push_len)
 696                         kmem_cache_free(qeth_core_header_cache, hdr);
 697                 if (rc == -EBUSY)
 698                         /* roll back to ETH header */
 699                         skb_pull(skb, push_len);
 700         }
 701         return rc;
 702 }
 703
 704 static int qeth_l2_xmit_osn(struct qeth_card *card, struct sk_buff *skb,
 705                             struct qeth_qdio_out_q *queue)
 706 {
 707         unsigned int elements;
 708         struct qeth_hdr *hdr;
 709
 710         if (skb->protocol == htons(ETH_P_IPV6))
 711                 return -EPROTONOSUPPORT;
 712
 713         hdr = (struct qeth_hdr *)skb->data;
 714         elements = qeth_get_elements_no(card, skb, 0, 0);
 715         if (!elements)
 716                 return -E2BIG;
 717         if (qeth_hdr_chk_and_bounce(skb, &hdr, sizeof(*hdr)))
 718                 return -EINVAL;
 719         return qeth_do_send_packet(card, queue, skb, hdr, 0, 0, elements);
 720 }
 721
 722 static netdev_tx_t qeth_l2_hard_start_xmit(struct sk_buff *skb,
 723                                            struct net_device *dev)
 724 {
 725         struct qeth_card *card = dev->ml_priv;
 726         int cast_type = qeth_l2_get_cast_type(card, skb);
 727         int ipv = qeth_get_ip_version(skb);
 728         struct qeth_qdio_out_q *queue;
 729         int tx_bytes = skb->len;
 730         int rc;
 731
 732         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
 733                 card->stats.tx_carrier_errors++;
 734                 goto tx_drop;
 735         }
 736
 737         queue = qeth_get_tx_queue(card, skb, ipv, cast_type);
 738
 739         if (card->options.performance_stats) {
 740                 card->perf_stats.outbound_cnt++;
 741                 card->perf_stats.outbound_start_time = qeth_get_micros();
 742         }
 743         netif_stop_queue(dev);
 744
 745         if (IS_OSN(card))
 746                 rc = qeth_l2_xmit_osn(card, skb, queue);
 747         else
 748                 rc = qeth_l2_xmit(card, skb, queue, cast_type, ipv);
 749
 750         if (!rc) {
 751                 card->stats.tx_packets++;
 752                 card->stats.tx_bytes += tx_bytes;
 753                 if (card->options.performance_stats)
 754                         card->perf_stats.outbound_time += qeth_get_micros() -
 755                                 card->perf_stats.outbound_start_time;
 756                 netif_wake_queue(dev);
 757                 return NETDEV_TX_OK;
 758         } else if (rc == -EBUSY) {
 759                 return NETDEV_TX_BUSY;
 760         } /* else fall through */
 761
 762 tx_drop:
 763         card->stats.tx_dropped++;
 764         card->stats.tx_errors++;
 765         dev_kfree_skb_any(skb);
 766         netif_wake_queue(dev);
 767         return NETDEV_TX_OK;
 768 }
 769
 770 static int __qeth_l2_open(struct net_device *dev)
 771 {
 772         struct qeth_card *card = dev->ml_priv;
 773         int rc = 0;
 774
 775         QETH_CARD_TEXT(card, 4, "qethopen");
 776         if (card->state == CARD_STATE_UP)
 777                 return rc;
 778         if (card->state != CARD_STATE_SOFTSETUP)
 779                 return -ENODEV;
 780
 781         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
 782              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
 783                 QETH_CARD_TEXT(card, 4, "nomacadr");
 784                 return -EPERM;
 785         }
 786         card->data.state = CH_STATE_UP;
 787         card->state = CARD_STATE_UP;
 788         netif_start_queue(dev);
 789
 790         if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) {
 791                 napi_enable(&card->napi);
 792                 local_bh_disable();
 793                 napi_schedule(&card->napi);
 794                 /* kick-start the NAPI softirq: */
 795                 local_bh_enable();
 796         } else
 797                 rc = -EIO;
 798         return rc;
 799 }
 800
 801 static int qeth_l2_open(struct net_device *dev)
 802 {
 803         struct qeth_card *card = dev->ml_priv;
 804
 805         QETH_CARD_TEXT(card, 5, "qethope_");
 806         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 807                 QETH_CARD_TEXT(card, 3, "openREC");
 808                 return -ERESTARTSYS;
 809         }
 810         return __qeth_l2_open(dev);
 811 }
 812
 813 static int qeth_l2_stop(struct net_device *dev)
 814 {
 815         struct qeth_card *card = dev->ml_priv;
 816
 817         QETH_CARD_TEXT(card, 4, "qethstop");
 818         netif_tx_disable(dev);
 819         if (card->state == CARD_STATE_UP) {
 820                 card->state = CARD_STATE_SOFTSETUP;
 821                 napi_disable(&card->napi);
 822         }
 823         return 0;
 824 }
 825
 826 static const struct device_type qeth_l2_devtype = {
 827         .name = "qeth_layer2",
 828         .groups = qeth_l2_attr_groups,
 829 };
 830
 831 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 832 {
 833         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 834         int rc;
 835
 836         if (gdev->dev.type == &qeth_generic_devtype) {
 837                 rc = qeth_l2_create_device_attributes(&gdev->dev);
 838                 if (rc)
 839                         return rc;
 840         }
 841         INIT_LIST_HEAD(&card->vid_list);
 842         hash_init(card->mac_htable);
 843         card->options.layer2 = 1;
 844         card->info.hwtrap = 0;
 845         qeth_l2_vnicc_set_defaults(card);
 846         return 0;
 847 }
 848
 849 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
 850 {
 851         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
 852
 853         if (cgdev->dev.type == &qeth_generic_devtype)
 854                 qeth_l2_remove_device_attributes(&cgdev->dev);
 855         qeth_set_allowed_threads(card, 0, 1);
 856         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 857
 858         if (cgdev->state == CCWGROUP_ONLINE)
 859                 qeth_l2_set_offline(cgdev);
 860
 861         cancel_work_sync(&card->close_dev_work);
 862         if (qeth_netdev_is_registered(card->dev))
 863                 unregister_netdev(card->dev);
 864 }
 865
 866 static const struct ethtool_ops qeth_l2_ethtool_ops = {
 867         .get_link = ethtool_op_get_link,
 868         .get_strings = qeth_core_get_strings,
 869         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 870         .get_sset_count = qeth_core_get_sset_count,
 871         .get_drvinfo = qeth_core_get_drvinfo,
 872         .get_link_ksettings = qeth_core_ethtool_get_link_ksettings,
 873 };
 874
 875 static const struct ethtool_ops qeth_l2_osn_ops = {
 876         .get_strings = qeth_core_get_strings,
 877         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 878         .get_sset_count = qeth_core_get_sset_count,
 879         .get_drvinfo = qeth_core_get_drvinfo,
 880 };
 881
 882 static const struct net_device_ops qeth_l2_netdev_ops = {
 883         .ndo_open               = qeth_l2_open,
 884         .ndo_stop               = qeth_l2_stop,
 885         .ndo_get_stats          = qeth_get_stats,
 886         .ndo_start_xmit         = qeth_l2_hard_start_xmit,
 887         .ndo_features_check     = qeth_features_check,
 888         .ndo_validate_addr      = eth_validate_addr,
 889         .ndo_set_rx_mode        = qeth_l2_set_rx_mode,
 890         .ndo_do_ioctl           = qeth_do_ioctl,
 891         .ndo_set_mac_address    = qeth_l2_set_mac_address,
 892         .ndo_vlan_rx_add_vid    = qeth_l2_vlan_rx_add_vid,
 893         .ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,
 894         .ndo_tx_timeout         = qeth_tx_timeout,
 895         .ndo_fix_features       = qeth_fix_features,
 896         .ndo_set_features       = qeth_set_features
 897 };
 898
 899 static int qeth_l2_setup_netdev(struct qeth_card *card)
 900 {
 901         int rc;
 902
 903         if (qeth_netdev_is_registered(card->dev))
 904                 return 0;
 905
 906         card->dev->priv_flags |= IFF_UNICAST_FLT;
 907         card->dev->netdev_ops = &qeth_l2_netdev_ops;
 908         if (card->info.type == QETH_CARD_TYPE_OSN) {
 909                 card->dev->ethtool_ops = &qeth_l2_osn_ops;
 910                 card->dev->flags |= IFF_NOARP;
 911         } else {
 912                 card->dev->ethtool_ops = &qeth_l2_ethtool_ops;
 913                 card->dev->needed_headroom = sizeof(struct qeth_hdr);
 914         }
 915
 916         if (card->info.type == QETH_CARD_TYPE_OSM)
 917                 card->dev->features |= NETIF_F_VLAN_CHALLENGED;
 918         else
 919                 card->dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
 920
 921         if (card->info.type == QETH_CARD_TYPE_OSD && !card->info.guestlan) {
 922                 card->dev->features |= NETIF_F_SG;
 923                 /* OSA 3S and earlier has no RX/TX support */
 924                 if (qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM)) {
 925                         card->dev->hw_features |= NETIF_F_IP_CSUM;
 926                         card->dev->vlan_features |= NETIF_F_IP_CSUM;
 927                 }
 928         }
 929         if (qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) {
 930                 card->dev->hw_features |= NETIF_F_IPV6_CSUM;
 931                 card->dev->vlan_features |= NETIF_F_IPV6_CSUM;
 932         }
 933         if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM) ||
 934             qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6)) {
 935                 card->dev->hw_features |= NETIF_F_RXCSUM;
 936                 card->dev->vlan_features |= NETIF_F_RXCSUM;
 937         }
 938
 939         qeth_l2_request_initial_mac(card);
 940         netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT);
 941         rc = register_netdev(card->dev);
 942         if (rc)
 943                 card->dev->netdev_ops = NULL;
 944         return rc;
 945 }
 946
 947 static int qeth_l2_start_ipassists(struct qeth_card *card)
 948 {
 949         /* configure isolation level */
 950         if (qeth_set_access_ctrl_online(card, 0))
 951                 return -ENODEV;
 952         return 0;
 953 }
 954
 955 static void qeth_l2_trace_features(struct qeth_card *card)
 956 {
 957         /* Set BridgePort features */
 958         QETH_CARD_TEXT(card, 2, "featuSBP");
 959         QETH_CARD_HEX(card, 2, &card->options.sbp.supported_funcs,
 960                       sizeof(card->options.sbp.supported_funcs));
 961         /* VNIC Characteristics features */
 962         QETH_CARD_TEXT(card, 2, "feaVNICC");
 963         QETH_CARD_HEX(card, 2, &card->options.vnicc.sup_chars,
 964                       sizeof(card->options.vnicc.sup_chars));
 965 }
 966
 967 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 968 {
 969         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 970         int rc = 0;
 971         enum qeth_card_states recover_flag;
 972
 973         mutex_lock(&card->discipline_mutex);
 974         mutex_lock(&card->conf_mutex);
 975         QETH_DBF_TEXT(SETUP, 2, "setonlin");
 976         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 977
 978         recover_flag = card->state;
 979         rc = qeth_core_hardsetup_card(card);
 980         if (rc) {
 981                 QETH_DBF_TEXT_(SETUP, 2, "2err%04x", rc);
 982                 rc = -ENODEV;
 983                 goto out_remove;
 984         }
 985         qeth_bridgeport_query_support(card);
 986         if (card->options.sbp.supported_funcs)
 987                 dev_info(&card->gdev->dev,
 988                 "The device represents a Bridge Capable Port\n");
 989
 990         rc = qeth_l2_setup_netdev(card);
 991         if (rc)
 992                 goto out_remove;
 993
 994         if (card->info.type != QETH_CARD_TYPE_OSN &&
 995             !qeth_l2_send_setmac(card, card->dev->dev_addr))
 996                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 997
 998         if (qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP)) {
 999                 if (card->info.hwtrap &&
1000                     qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM))
1001                         card->info.hwtrap = 0;
1002         } else
1003                 card->info.hwtrap = 0;
1004
1005         /* for the rx_bcast characteristic, init VNICC after setmac */
1006         qeth_l2_vnicc_init(card);
1007
1008         qeth_trace_features(card);
1009         qeth_l2_trace_features(card);
1010
1011         qeth_l2_setup_bridgeport_attrs(card);
1012
1013         card->state = CARD_STATE_HARDSETUP;
1014         qeth_print_status_message(card);
1015
1016         /* softsetup */
1017         QETH_DBF_TEXT(SETUP, 2, "softsetp");
1018
1019         if ((card->info.type == QETH_CARD_TYPE_OSD) ||
1020             (card->info.type == QETH_CARD_TYPE_OSX)) {
1021                 rc = qeth_l2_start_ipassists(card);
1022                 if (rc)
1023                         goto out_remove;
1024         }
1025
1026         if (card->info.type != QETH_CARD_TYPE_OSN)
1027                 qeth_l2_process_vlans(card);
1028
1029         netif_tx_disable(card->dev);
1030
1031         rc = qeth_init_qdio_queues(card);
1032         if (rc) {
1033                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1034                 rc = -ENODEV;
1035                 goto out_remove;
1036         }
1037         card->state = CARD_STATE_SOFTSETUP;
1038         if (card->lan_online)
1039                 netif_carrier_on(card->dev);
1040         else
1041                 netif_carrier_off(card->dev);
1042
1043         qeth_set_allowed_threads(card, 0xffffffff, 0);
1044
1045         qeth_enable_hw_features(card->dev);
1046         if (recover_flag == CARD_STATE_RECOVER) {
1047                 if (recovery_mode &&
1048                     card->info.type != QETH_CARD_TYPE_OSN) {
1049                         __qeth_l2_open(card->dev);
1050                         qeth_l2_set_rx_mode(card->dev);
1051                 } else {
1052                         rtnl_lock();
1053                         dev_open(card->dev);
1054                         rtnl_unlock();
1055                 }
1056         }
1057         /* let user_space know that device is online */
1058         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1059         mutex_unlock(&card->conf_mutex);
1060         mutex_unlock(&card->discipline_mutex);
1061         return 0;
1062
1063 out_remove:
1064         qeth_l2_stop_card(card, 0);
1065         ccw_device_set_offline(CARD_DDEV(card));
1066         ccw_device_set_offline(CARD_WDEV(card));
1067         ccw_device_set_offline(CARD_RDEV(card));
1068         qdio_free(CARD_DDEV(card));
1069         if (recover_flag == CARD_STATE_RECOVER)
1070                 card->state = CARD_STATE_RECOVER;
1071         else
1072                 card->state = CARD_STATE_DOWN;
1073         mutex_unlock(&card->conf_mutex);
1074         mutex_unlock(&card->discipline_mutex);
1075         return rc;
1076 }
1077
1078 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1079 {
1080         return __qeth_l2_set_online(gdev, 0);
1081 }
1082
1083 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1084                                         int recovery_mode)
1085 {
1086         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1087         int rc = 0, rc2 = 0, rc3 = 0;
1088         enum qeth_card_states recover_flag;
1089
1090         mutex_lock(&card->discipline_mutex);
1091         mutex_lock(&card->conf_mutex);
1092         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1093         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1094
1095         netif_carrier_off(card->dev);
1096         recover_flag = card->state;
1097         if ((!recovery_mode && card->info.hwtrap) || card->info.hwtrap == 2) {
1098                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1099                 card->info.hwtrap = 1;
1100         }
1101         qeth_l2_stop_card(card, recovery_mode);
1102         rc  = ccw_device_set_offline(CARD_DDEV(card));
1103         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1104         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1105         if (!rc)
1106                 rc = (rc2) ? rc2 : rc3;
1107         if (rc)
1108                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1109         qdio_free(CARD_DDEV(card));
1110         if (recover_flag == CARD_STATE_UP)
1111                 card->state = CARD_STATE_RECOVER;
1112         /* let user_space know that device is offline */
1113         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1114         mutex_unlock(&card->conf_mutex);
1115         mutex_unlock(&card->discipline_mutex);
1116         return 0;
1117 }
1118
1119 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1120 {
1121         return __qeth_l2_set_offline(cgdev, 0);
1122 }
1123
1124 static int qeth_l2_recover(void *ptr)
1125 {
1126         struct qeth_card *card;
1127         int rc = 0;
1128
1129         card = (struct qeth_card *) ptr;
1130         QETH_CARD_TEXT(card, 2, "recover1");
1131         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1132                 return 0;
1133         QETH_CARD_TEXT(card, 2, "recover2");
1134         dev_warn(&card->gdev->dev,
1135                 "A recovery process has been started for the device\n");
1136         qeth_set_recovery_task(card);
1137         __qeth_l2_set_offline(card->gdev, 1);
1138         rc = __qeth_l2_set_online(card->gdev, 1);
1139         if (!rc)
1140                 dev_info(&card->gdev->dev,
1141                         "Device successfully recovered!\n");
1142         else {
1143                 qeth_close_dev(card);
1144                 dev_warn(&card->gdev->dev, "The qeth device driver "
1145                                 "failed to recover an error on the device\n");
1146         }
1147         qeth_clear_recovery_task(card);
1148         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1149         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1150         return 0;
1151 }
1152
1153 static int __init qeth_l2_init(void)
1154 {
1155         pr_info("register layer 2 discipline\n");
1156         return 0;
1157 }
1158
1159 static void __exit qeth_l2_exit(void)
1160 {
1161         pr_info("unregister layer 2 discipline\n");
1162 }
1163
1164 static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev)
1165 {
1166         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1167
1168         netif_device_detach(card->dev);
1169         qeth_set_allowed_threads(card, 0, 1);
1170         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1171         if (gdev->state == CCWGROUP_OFFLINE)
1172                 return 0;
1173         if (card->state == CARD_STATE_UP) {
1174                 if (card->info.hwtrap)
1175                         qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1176                 __qeth_l2_set_offline(card->gdev, 1);
1177         } else
1178                 __qeth_l2_set_offline(card->gdev, 0);
1179         return 0;
1180 }
1181
1182 static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
1183 {
1184         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1185         int rc = 0;
1186
1187         if (gdev->state == CCWGROUP_OFFLINE)
1188                 goto out;
1189
1190         if (card->state == CARD_STATE_RECOVER) {
1191                 rc = __qeth_l2_set_online(card->gdev, 1);
1192                 if (rc) {
1193                         rtnl_lock();
1194                         dev_close(card->dev);
1195                         rtnl_unlock();
1196                 }
1197         } else
1198                 rc = __qeth_l2_set_online(card->gdev, 0);
1199 out:
1200         qeth_set_allowed_threads(card, 0xffffffff, 0);
1201         netif_device_attach(card->dev);
1202         if (rc)
1203                 dev_warn(&card->gdev->dev, "The qeth device driver "
1204                         "failed to recover an error on the device\n");
1205         return rc;
1206 }
1207
1208 /* Returns zero if the command is successfully "consumed" */
1209 static int qeth_l2_control_event(struct qeth_card *card,
1210                                         struct qeth_ipa_cmd *cmd)
1211 {
1212         switch (cmd->hdr.command) {
1213         case IPA_CMD_SETBRIDGEPORT_OSA:
1214         case IPA_CMD_SETBRIDGEPORT_IQD:
1215                 if (cmd->data.sbp.hdr.command_code ==
1216                                 IPA_SBP_BRIDGE_PORT_STATE_CHANGE) {
1217                         qeth_bridge_state_change(card, cmd);
1218                         return 0;
1219                 } else
1220                         return 1;
1221         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
1222                 qeth_bridge_host_event(card, cmd);
1223                 return 0;
1224         default:
1225                 return 1;
1226         }
1227 }
1228
1229 struct qeth_discipline qeth_l2_discipline = {
1230         .devtype = &qeth_l2_devtype,
1231         .process_rx_buffer = qeth_l2_process_inbound_buffer,
1232         .recover = qeth_l2_recover,
1233         .setup = qeth_l2_probe_device,
1234         .remove = qeth_l2_remove_device,
1235         .set_online = qeth_l2_set_online,
1236         .set_offline = qeth_l2_set_offline,
1237         .freeze = qeth_l2_pm_suspend,
1238         .thaw = qeth_l2_pm_resume,
1239         .restore = qeth_l2_pm_resume,
1240         .do_ioctl = NULL,
1241         .control_event_handler = qeth_l2_control_event,
1242 };
1243 EXPORT_SYMBOL_GPL(qeth_l2_discipline);
1244
1245 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1246                            struct qeth_cmd_buffer *iob)
1247 {
1248         struct qeth_channel *channel = iob->channel;
1249         unsigned long flags;
1250         int rc = 0;
1251
1252         QETH_CARD_TEXT(card, 5, "osndctrd");
1253
1254         wait_event(card->wait_q,
1255                    atomic_cmpxchg(&channel->irq_pending, 0, 1) == 0);
1256         qeth_prepare_control_data(card, len, iob);
1257         QETH_CARD_TEXT(card, 6, "osnoirqp");
1258         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1259         rc = ccw_device_start_timeout(channel->ccwdev, channel->ccw,
1260                                       (addr_t) iob, 0, 0, QETH_IPA_TIMEOUT);
1261         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1262         if (rc) {
1263                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1264                            "ccw_device_start rc = %i\n", rc);
1265                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1266                 qeth_release_buffer(channel, iob);
1267                 atomic_set(&channel->irq_pending, 0);
1268                 wake_up(&card->wait_q);
1269         }
1270         return rc;
1271 }
1272
1273 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1274                         struct qeth_cmd_buffer *iob, int data_len)
1275 {
1276         u16 s1, s2;
1277
1278         QETH_CARD_TEXT(card, 4, "osndipa");
1279
1280         qeth_prepare_ipa_cmd(card, iob);
1281         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1282         s2 = (u16)data_len;
1283         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1284         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1285         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1286         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1287         return qeth_osn_send_control_data(card, s1, iob);
1288 }
1289
1290 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1291 {
1292         struct qeth_cmd_buffer *iob;
1293         struct qeth_card *card;
1294
1295         if (!dev)
1296                 return -ENODEV;
1297         card = dev->ml_priv;
1298         if (!card)
1299                 return -ENODEV;
1300         QETH_CARD_TEXT(card, 2, "osnsdmc");
1301         if (!qeth_card_hw_is_reachable(card))
1302                 return -ENODEV;
1303         iob = qeth_wait_for_buffer(&card->write);
1304         memcpy(__ipa_cmd(iob), data, data_len);
1305         return qeth_osn_send_ipa_cmd(card, iob, data_len);
1306 }
1307 EXPORT_SYMBOL(qeth_osn_assist);
1308
1309 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1310                   int (*assist_cb)(struct net_device *, void *),
1311                   int (*data_cb)(struct sk_buff *))
1312 {
1313         struct qeth_card *card;
1314
1315         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1316         if (*dev == NULL)
1317                 return -ENODEV;
1318         card = (*dev)->ml_priv;
1319         if (!card)
1320                 return -ENODEV;
1321         QETH_CARD_TEXT(card, 2, "osnreg");
1322         if ((assist_cb == NULL) || (data_cb == NULL))
1323                 return -EINVAL;
1324         card->osn_info.assist_cb = assist_cb;
1325         card->osn_info.data_cb = data_cb;
1326         return 0;
1327 }
1328 EXPORT_SYMBOL(qeth_osn_register);
1329
1330 void qeth_osn_deregister(struct net_device *dev)
1331 {
1332         struct qeth_card *card;
1333
1334         if (!dev)
1335                 return;
1336         card = dev->ml_priv;
1337         if (!card)
1338                 return;
1339         QETH_CARD_TEXT(card, 2, "osndereg");
1340         card->osn_info.assist_cb = NULL;
1341         card->osn_info.data_cb = NULL;
1342         return;
1343 }
1344 EXPORT_SYMBOL(qeth_osn_deregister);
1345
1346 /* SETBRIDGEPORT support, async notifications */
1347
1348 enum qeth_an_event_type {anev_reg_unreg, anev_abort, anev_reset};
1349
1350 /**
1351  * qeth_bridge_emit_host_event() - bridgeport address change notification
1352  * @card:  qeth_card structure pointer, for udev events.
1353  * @evtype:  "normal" register/unregister, or abort, or reset. For abort
1354  *            and reset token and addr_lnid are unused and may be NULL.
1355  * @code:  event bitmask: high order bit 0x80 value 1 means removal of an
1356  *                        object, 0 - addition of an object.
1357  *                        0x01 - VLAN, 0x02 - MAC, 0x03 - VLAN and MAC.
1358  * @token: "network token" structure identifying physical address of the port.
1359  * @addr_lnid: pointer to structure with MAC address and VLAN ID.
1360  *
1361  * This function is called when registrations and deregistrations are
1362  * reported by the hardware, and also when notifications are enabled -
1363  * for all currently registered addresses.
1364  */
1365 static void qeth_bridge_emit_host_event(struct qeth_card *card,
1366         enum qeth_an_event_type evtype,
1367         u8 code, struct net_if_token *token, struct mac_addr_lnid *addr_lnid)
1368 {
1369         char str[7][32];
1370         char *env[8];
1371         int i = 0;
1372
1373         switch (evtype) {
1374         case anev_reg_unreg:
1375                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=%s",
1376                                 (code & IPA_ADDR_CHANGE_CODE_REMOVAL)
1377                                 ? "deregister" : "register");
1378                 env[i] = str[i]; i++;
1379                 if (code & IPA_ADDR_CHANGE_CODE_VLANID) {
1380                         snprintf(str[i], sizeof(str[i]), "VLAN=%d",
1381                                 addr_lnid->lnid);
1382                         env[i] = str[i]; i++;
1383                 }
1384                 if (code & IPA_ADDR_CHANGE_CODE_MACADDR) {
1385                         snprintf(str[i], sizeof(str[i]), "MAC=%pM",
1386                                 addr_lnid->mac);
1387                         env[i] = str[i]; i++;
1388                 }
1389                 snprintf(str[i], sizeof(str[i]), "NTOK_BUSID=%x.%x.%04x",
1390                         token->cssid, token->ssid, token->devnum);
1391                 env[i] = str[i]; i++;
1392                 snprintf(str[i], sizeof(str[i]), "NTOK_IID=%02x", token->iid);
1393                 env[i] = str[i]; i++;
1394                 snprintf(str[i], sizeof(str[i]), "NTOK_CHPID=%02x",
1395                                 token->chpid);
1396                 env[i] = str[i]; i++;
1397                 snprintf(str[i], sizeof(str[i]), "NTOK_CHID=%04x", token->chid);
1398                 env[i] = str[i]; i++;
1399                 break;
1400         case anev_abort:
1401                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=abort");
1402                 env[i] = str[i]; i++;
1403                 break;
1404         case anev_reset:
1405                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=reset");
1406                 env[i] = str[i]; i++;
1407                 break;
1408         }
1409         env[i] = NULL;
1410         kobject_uevent_env(&card->gdev->dev.kobj, KOBJ_CHANGE, env);
1411 }
1412
1413 struct qeth_bridge_state_data {
1414         struct work_struct worker;
1415         struct qeth_card *card;
1416         struct qeth_sbp_state_change qports;
1417 };
1418
1419 static void qeth_bridge_state_change_worker(struct work_struct *work)
1420 {
1421         struct qeth_bridge_state_data *data =
1422                 container_of(work, struct qeth_bridge_state_data, worker);
1423         /* We are only interested in the first entry - local port */
1424         struct qeth_sbp_port_entry *entry = &data->qports.entry[0];
1425         char env_locrem[32];
1426         char env_role[32];
1427         char env_state[32];
1428         char *env[] = {
1429                 env_locrem,
1430                 env_role,
1431                 env_state,
1432                 NULL
1433         };
1434
1435         /* Role should not change by itself, but if it did, */
1436         /* information from the hardware is authoritative.  */
1437         mutex_lock(&data->card->conf_mutex);
1438         data->card->options.sbp.role = entry->role;
1439         mutex_unlock(&data->card->conf_mutex);
1440
1441         snprintf(env_locrem, sizeof(env_locrem), "BRIDGEPORT=statechange");
1442         snprintf(env_role, sizeof(env_role), "ROLE=%s",
1443                 (entry->role == QETH_SBP_ROLE_NONE) ? "none" :
1444                 (entry->role == QETH_SBP_ROLE_PRIMARY) ? "primary" :
1445                 (entry->role == QETH_SBP_ROLE_SECONDARY) ? "secondary" :
1446                 "<INVALID>");
1447         snprintf(env_state, sizeof(env_state), "STATE=%s",
1448                 (entry->state == QETH_SBP_STATE_INACTIVE) ? "inactive" :
1449                 (entry->state == QETH_SBP_STATE_STANDBY) ? "standby" :
1450                 (entry->state == QETH_SBP_STATE_ACTIVE) ? "active" :
1451                 "<INVALID>");
1452         kobject_uevent_env(&data->card->gdev->dev.kobj,
1453                                 KOBJ_CHANGE, env);
1454         kfree(data);
1455 }
1456
1457 static void qeth_bridge_state_change(struct qeth_card *card,
1458                                         struct qeth_ipa_cmd *cmd)
1459 {
1460         struct qeth_sbp_state_change *qports =
1461                  &cmd->data.sbp.data.state_change;
1462         struct qeth_bridge_state_data *data;
1463         int extrasize;
1464
1465         QETH_CARD_TEXT(card, 2, "brstchng");
1466         if (qports->num_entries == 0) {
1467                 QETH_CARD_TEXT(card, 2, "BPempty");
1468                 return;
1469         }
1470         if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1471                 QETH_CARD_TEXT_(card, 2, "BPsz%04x", qports->entry_length);
1472                 return;
1473         }
1474         extrasize = sizeof(struct qeth_sbp_port_entry) * qports->num_entries;
1475         data = kzalloc(sizeof(struct qeth_bridge_state_data) + extrasize,
1476                 GFP_ATOMIC);
1477         if (!data) {
1478                 QETH_CARD_TEXT(card, 2, "BPSalloc");
1479                 return;
1480         }
1481         INIT_WORK(&data->worker, qeth_bridge_state_change_worker);
1482         data->card = card;
1483         memcpy(&data->qports, qports,
1484                         sizeof(struct qeth_sbp_state_change) + extrasize);
1485         queue_work(qeth_wq, &data->worker);
1486 }
1487
1488 struct qeth_bridge_host_data {
1489         struct work_struct worker;
1490         struct qeth_card *card;
1491         struct qeth_ipacmd_addr_change hostevs;
1492 };
1493
1494 static void qeth_bridge_host_event_worker(struct work_struct *work)
1495 {
1496         struct qeth_bridge_host_data *data =
1497                 container_of(work, struct qeth_bridge_host_data, worker);
1498         int i;
1499
1500         if (data->hostevs.lost_event_mask) {
1501                 dev_info(&data->card->gdev->dev,
1502 "Address notification from the Bridge Port stopped %s (%s)\n",
1503                         data->card->dev->name,
1504                         (data->hostevs.lost_event_mask == 0x01)
1505                         ? "Overflow"
1506                         : (data->hostevs.lost_event_mask == 0x02)
1507                         ? "Bridge port state change"
1508                         : "Unknown reason");
1509                 mutex_lock(&data->card->conf_mutex);
1510                 data->card->options.sbp.hostnotification = 0;
1511                 mutex_unlock(&data->card->conf_mutex);
1512                 qeth_bridge_emit_host_event(data->card, anev_abort,
1513                         0, NULL, NULL);
1514         } else
1515                 for (i = 0; i < data->hostevs.num_entries; i++) {
1516                         struct qeth_ipacmd_addr_change_entry *entry =
1517                                         &data->hostevs.entry[i];
1518                         qeth_bridge_emit_host_event(data->card,
1519                                         anev_reg_unreg,
1520                                         entry->change_code,
1521                                         &entry->token, &entry->addr_lnid);
1522                 }
1523         kfree(data);
1524 }
1525
1526 static void qeth_bridge_host_event(struct qeth_card *card,
1527                                         struct qeth_ipa_cmd *cmd)
1528 {
1529         struct qeth_ipacmd_addr_change *hostevs =
1530                  &cmd->data.addrchange;
1531         struct qeth_bridge_host_data *data;
1532         int extrasize;
1533
1534         QETH_CARD_TEXT(card, 2, "brhostev");
1535         if (cmd->hdr.return_code != 0x0000) {
1536                 if (cmd->hdr.return_code == 0x0010) {
1537                         if (hostevs->lost_event_mask == 0x00)
1538                                 hostevs->lost_event_mask = 0xff;
1539                 } else {
1540                         QETH_CARD_TEXT_(card, 2, "BPHe%04x",
1541                                 cmd->hdr.return_code);
1542                         return;
1543                 }
1544         }
1545         extrasize = sizeof(struct qeth_ipacmd_addr_change_entry) *
1546                                                 hostevs->num_entries;
1547         data = kzalloc(sizeof(struct qeth_bridge_host_data) + extrasize,
1548                 GFP_ATOMIC);
1549         if (!data) {
1550                 QETH_CARD_TEXT(card, 2, "BPHalloc");
1551                 return;
1552         }
1553         INIT_WORK(&data->worker, qeth_bridge_host_event_worker);
1554         data->card = card;
1555         memcpy(&data->hostevs, hostevs,
1556                         sizeof(struct qeth_ipacmd_addr_change) + extrasize);
1557         queue_work(qeth_wq, &data->worker);
1558 }
1559
1560 /* SETBRIDGEPORT support; sending commands */
1561
1562 struct _qeth_sbp_cbctl {
1563         u16 ipa_rc;
1564         u16 cmd_rc;
1565         union {
1566                 u32 supported;
1567                 struct {
1568                         enum qeth_sbp_roles *role;
1569                         enum qeth_sbp_states *state;
1570                 } qports;
1571         } data;
1572 };
1573
1574 /**
1575  * qeth_bridgeport_makerc() - derive "traditional" error from hardware codes.
1576  * @card:                     qeth_card structure pointer, for debug messages.
1577  * @cbctl:                    state structure with hardware return codes.
1578  * @setcmd:                   IPA command code
1579  *
1580  * Returns negative errno-compatible error indication or 0 on success.
1581  */
1582 static int qeth_bridgeport_makerc(struct qeth_card *card,
1583         struct _qeth_sbp_cbctl *cbctl, enum qeth_ipa_sbp_cmd setcmd)
1584 {
1585         int rc;
1586         int is_iqd = (card->info.type == QETH_CARD_TYPE_IQD);
1587
1588         if ((is_iqd && (cbctl->ipa_rc == IPA_RC_SUCCESS)) ||
1589             (!is_iqd && (cbctl->ipa_rc == cbctl->cmd_rc)))
1590                 switch (cbctl->cmd_rc) {
1591                 case IPA_RC_SUCCESS:
1592                         rc = 0;
1593                         break;
1594                 case IPA_RC_L2_UNSUPPORTED_CMD:
1595                 case IPA_RC_UNSUPPORTED_COMMAND:
1596                         rc = -EOPNOTSUPP;
1597                         break;
1598                 case IPA_RC_SBP_OSA_NOT_CONFIGURED:
1599                 case IPA_RC_SBP_IQD_NOT_CONFIGURED:
1600                         rc = -ENODEV; /* maybe not the best code here? */
1601                         dev_err(&card->gdev->dev,
1602         "The device is not configured as a Bridge Port\n");
1603                         break;
1604                 case IPA_RC_SBP_OSA_OS_MISMATCH:
1605                 case IPA_RC_SBP_IQD_OS_MISMATCH:
1606                         rc = -EPERM;
1607                         dev_err(&card->gdev->dev,
1608         "A Bridge Port is already configured by a different operating system\n");
1609                         break;
1610                 case IPA_RC_SBP_OSA_ANO_DEV_PRIMARY:
1611                 case IPA_RC_SBP_IQD_ANO_DEV_PRIMARY:
1612                         switch (setcmd) {
1613                         case IPA_SBP_SET_PRIMARY_BRIDGE_PORT:
1614                                 rc = -EEXIST;
1615                                 dev_err(&card->gdev->dev,
1616         "The LAN already has a primary Bridge Port\n");
1617                                 break;
1618                         case IPA_SBP_SET_SECONDARY_BRIDGE_PORT:
1619                                 rc = -EBUSY;
1620                                 dev_err(&card->gdev->dev,
1621         "The device is already a primary Bridge Port\n");
1622                                 break;
1623                         default:
1624                                 rc = -EIO;
1625                         }
1626                         break;
1627                 case IPA_RC_SBP_OSA_CURRENT_SECOND:
1628                 case IPA_RC_SBP_IQD_CURRENT_SECOND:
1629                         rc = -EBUSY;
1630                         dev_err(&card->gdev->dev,
1631         "The device is already a secondary Bridge Port\n");
1632                         break;
1633                 case IPA_RC_SBP_OSA_LIMIT_SECOND:
1634                 case IPA_RC_SBP_IQD_LIMIT_SECOND:
1635                         rc = -EEXIST;
1636                         dev_err(&card->gdev->dev,
1637         "The LAN cannot have more secondary Bridge Ports\n");
1638                         break;
1639                 case IPA_RC_SBP_OSA_CURRENT_PRIMARY:
1640                 case IPA_RC_SBP_IQD_CURRENT_PRIMARY:
1641                         rc = -EBUSY;
1642                         dev_err(&card->gdev->dev,
1643         "The device is already a primary Bridge Port\n");
1644                         break;
1645                 case IPA_RC_SBP_OSA_NOT_AUTHD_BY_ZMAN:
1646                 case IPA_RC_SBP_IQD_NOT_AUTHD_BY_ZMAN:
1647                         rc = -EACCES;
1648                         dev_err(&card->gdev->dev,
1649         "The device is not authorized to be a Bridge Port\n");
1650                         break;
1651                 default:
1652                         rc = -EIO;
1653                 }
1654         else
1655                 switch (cbctl->ipa_rc) {
1656                 case IPA_RC_NOTSUPP:
1657                         rc = -EOPNOTSUPP;
1658                         break;
1659                 case IPA_RC_UNSUPPORTED_COMMAND:
1660                         rc = -EOPNOTSUPP;
1661                         break;
1662                 default:
1663                         rc = -EIO;
1664                 }
1665
1666         if (rc) {
1667                 QETH_CARD_TEXT_(card, 2, "SBPi%04x", cbctl->ipa_rc);
1668                 QETH_CARD_TEXT_(card, 2, "SBPc%04x", cbctl->cmd_rc);
1669         }
1670         return rc;
1671 }
1672
1673 static struct qeth_cmd_buffer *qeth_sbp_build_cmd(struct qeth_card *card,
1674                                                   enum qeth_ipa_sbp_cmd sbp_cmd,
1675                                                   unsigned int cmd_length)
1676 {
1677         enum qeth_ipa_cmds ipa_cmd = (card->info.type == QETH_CARD_TYPE_IQD) ?
1678                                         IPA_CMD_SETBRIDGEPORT_IQD :
1679                                         IPA_CMD_SETBRIDGEPORT_OSA;
1680         struct qeth_cmd_buffer *iob;
1681         struct qeth_ipa_cmd *cmd;
1682
1683         iob = qeth_get_ipacmd_buffer(card, ipa_cmd, 0);
1684         if (!iob)
1685                 return iob;
1686         cmd = __ipa_cmd(iob);
1687         cmd->data.sbp.hdr.cmdlength = sizeof(struct qeth_ipacmd_sbp_hdr) +
1688                                       cmd_length;
1689         cmd->data.sbp.hdr.command_code = sbp_cmd;
1690         cmd->data.sbp.hdr.used_total = 1;
1691         cmd->data.sbp.hdr.seq_no = 1;
1692         return iob;
1693 }
1694
1695 static int qeth_bridgeport_query_support_cb(struct qeth_card *card,
1696         struct qeth_reply *reply, unsigned long data)
1697 {
1698         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1699         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1700         QETH_CARD_TEXT(card, 2, "brqsupcb");
1701         cbctl->ipa_rc = cmd->hdr.return_code;
1702         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1703         if ((cbctl->ipa_rc == 0) && (cbctl->cmd_rc == 0)) {
1704                 cbctl->data.supported =
1705                         cmd->data.sbp.data.query_cmds_supp.supported_cmds;
1706         } else {
1707                 cbctl->data.supported = 0;
1708         }
1709         return 0;
1710 }
1711
1712 /**
1713  * qeth_bridgeport_query_support() - store bitmask of supported subfunctions.
1714  * @card:                            qeth_card structure pointer.
1715  *
1716  * Sets bitmask of supported setbridgeport subfunctions in the qeth_card
1717  * strucutre: card->options.sbp.supported_funcs.
1718  */
1719 static void qeth_bridgeport_query_support(struct qeth_card *card)
1720 {
1721         struct qeth_cmd_buffer *iob;
1722         struct _qeth_sbp_cbctl cbctl;
1723
1724         QETH_CARD_TEXT(card, 2, "brqsuppo");
1725         iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_COMMANDS_SUPPORTED,
1726                                  sizeof(struct qeth_sbp_query_cmds_supp));
1727         if (!iob)
1728                 return;
1729         if (qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_support_cb,
1730                                                         (void *)&cbctl) ||
1731             qeth_bridgeport_makerc(card, &cbctl,
1732                                         IPA_SBP_QUERY_COMMANDS_SUPPORTED)) {
1733                 /* non-zero makerc signifies failure, and produce messages */
1734                 card->options.sbp.role = QETH_SBP_ROLE_NONE;
1735                 return;
1736         }
1737         card->options.sbp.supported_funcs = cbctl.data.supported;
1738 }
1739
1740 static int qeth_bridgeport_query_ports_cb(struct qeth_card *card,
1741         struct qeth_reply *reply, unsigned long data)
1742 {
1743         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1744         struct qeth_sbp_query_ports *qports = &cmd->data.sbp.data.query_ports;
1745         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1746
1747         QETH_CARD_TEXT(card, 2, "brqprtcb");
1748         cbctl->ipa_rc = cmd->hdr.return_code;
1749         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1750         if ((cbctl->ipa_rc != 0) || (cbctl->cmd_rc != 0))
1751                 return 0;
1752         if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1753                 cbctl->cmd_rc = 0xffff;
1754                 QETH_CARD_TEXT_(card, 2, "SBPs%04x", qports->entry_length);
1755                 return 0;
1756         }
1757         /* first entry contains the state of the local port */
1758         if (qports->num_entries > 0) {
1759                 if (cbctl->data.qports.role)
1760                         *cbctl->data.qports.role = qports->entry[0].role;
1761                 if (cbctl->data.qports.state)
1762                         *cbctl->data.qports.state = qports->entry[0].state;
1763         }
1764         return 0;
1765 }
1766
1767 /**
1768  * qeth_bridgeport_query_ports() - query local bridgeport status.
1769  * @card:                          qeth_card structure pointer.
1770  * @role:   Role of the port: 0-none, 1-primary, 2-secondary.
1771  * @state:  State of the port: 0-inactive, 1-standby, 2-active.
1772  *
1773  * Returns negative errno-compatible error indication or 0 on success.
1774  *
1775  * 'role' and 'state' are not updated in case of hardware operation failure.
1776  */
1777 int qeth_bridgeport_query_ports(struct qeth_card *card,
1778         enum qeth_sbp_roles *role, enum qeth_sbp_states *state)
1779 {
1780         int rc = 0;
1781         struct qeth_cmd_buffer *iob;
1782         struct _qeth_sbp_cbctl cbctl = {
1783                 .data = {
1784                         .qports = {
1785                                 .role = role,
1786                                 .state = state,
1787                         },
1788                 },
1789         };
1790
1791         QETH_CARD_TEXT(card, 2, "brqports");
1792         if (!(card->options.sbp.supported_funcs & IPA_SBP_QUERY_BRIDGE_PORTS))
1793                 return -EOPNOTSUPP;
1794         iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_BRIDGE_PORTS, 0);
1795         if (!iob)
1796                 return -ENOMEM;
1797         rc = qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_ports_cb,
1798                                 (void *)&cbctl);
1799         if (rc < 0)
1800                 return rc;
1801         return qeth_bridgeport_makerc(card, &cbctl, IPA_SBP_QUERY_BRIDGE_PORTS);
1802 }
1803
1804 static int qeth_bridgeport_set_cb(struct qeth_card *card,
1805         struct qeth_reply *reply, unsigned long data)
1806 {
1807         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
1808         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1809         QETH_CARD_TEXT(card, 2, "brsetrcb");
1810         cbctl->ipa_rc = cmd->hdr.return_code;
1811         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1812         return 0;
1813 }
1814
1815 /**
1816  * qeth_bridgeport_setrole() - Assign primary role to the port.
1817  * @card:                      qeth_card structure pointer.
1818  * @role:                      Role to assign.
1819  *
1820  * Returns negative errno-compatible error indication or 0 on success.
1821  */
1822 int qeth_bridgeport_setrole(struct qeth_card *card, enum qeth_sbp_roles role)
1823 {
1824         int rc = 0;
1825         int cmdlength;
1826         struct qeth_cmd_buffer *iob;
1827         struct _qeth_sbp_cbctl cbctl;
1828         enum qeth_ipa_sbp_cmd setcmd;
1829
1830         QETH_CARD_TEXT(card, 2, "brsetrol");
1831         switch (role) {
1832         case QETH_SBP_ROLE_NONE:
1833                 setcmd = IPA_SBP_RESET_BRIDGE_PORT_ROLE;
1834                 cmdlength = sizeof(struct qeth_sbp_reset_role);
1835                 break;
1836         case QETH_SBP_ROLE_PRIMARY:
1837                 setcmd = IPA_SBP_SET_PRIMARY_BRIDGE_PORT;
1838                 cmdlength = sizeof(struct qeth_sbp_set_primary);
1839                 break;
1840         case QETH_SBP_ROLE_SECONDARY:
1841                 setcmd = IPA_SBP_SET_SECONDARY_BRIDGE_PORT;
1842                 cmdlength = sizeof(struct qeth_sbp_set_secondary);
1843                 break;
1844         default:
1845                 return -EINVAL;
1846         }
1847         if (!(card->options.sbp.supported_funcs & setcmd))
1848                 return -EOPNOTSUPP;
1849         iob = qeth_sbp_build_cmd(card, setcmd, cmdlength);
1850         if (!iob)
1851                 return -ENOMEM;
1852         rc = qeth_send_ipa_cmd(card, iob, qeth_bridgeport_set_cb,
1853                                 (void *)&cbctl);
1854         if (rc < 0)
1855                 return rc;
1856         return qeth_bridgeport_makerc(card, &cbctl, setcmd);
1857 }
1858
1859 /**
1860  * qeth_anset_makerc() - derive "traditional" error from hardware codes.
1861  * @card:                     qeth_card structure pointer, for debug messages.
1862  *
1863  * Returns negative errno-compatible error indication or 0 on success.
1864  */
1865 static int qeth_anset_makerc(struct qeth_card *card, int pnso_rc, u16 response)
1866 {
1867         int rc;
1868
1869         if (pnso_rc == 0)
1870                 switch (response) {
1871                 case 0x0001:
1872                         rc = 0;
1873                         break;
1874                 case 0x0004:
1875                 case 0x0100:
1876                 case 0x0106:
1877                         rc = -EOPNOTSUPP;
1878                         dev_err(&card->gdev->dev,
1879                                 "Setting address notification failed\n");
1880                         break;
1881                 case 0x0107:
1882                         rc = -EAGAIN;
1883                         break;
1884                 default:
1885                         rc = -EIO;
1886                 }
1887         else
1888                 rc = -EIO;
1889
1890         if (rc) {
1891                 QETH_CARD_TEXT_(card, 2, "SBPp%04x", pnso_rc);
1892                 QETH_CARD_TEXT_(card, 2, "SBPr%04x", response);
1893         }
1894         return rc;
1895 }
1896
1897 static void qeth_bridgeport_an_set_cb(void *priv,
1898                 enum qdio_brinfo_entry_type type, void *entry)
1899 {
1900         struct qeth_card *card = (struct qeth_card *)priv;
1901         struct qdio_brinfo_entry_l2 *l2entry;
1902         u8 code;
1903
1904         if (type != l2_addr_lnid) {
1905                 WARN_ON_ONCE(1);
1906                 return;
1907         }
1908
1909         l2entry = (struct qdio_brinfo_entry_l2 *)entry;
1910         code = IPA_ADDR_CHANGE_CODE_MACADDR;
1911         if (l2entry->addr_lnid.lnid < VLAN_N_VID)
1912                 code |= IPA_ADDR_CHANGE_CODE_VLANID;
1913         qeth_bridge_emit_host_event(card, anev_reg_unreg, code,
1914                 (struct net_if_token *)&l2entry->nit,
1915                 (struct mac_addr_lnid *)&l2entry->addr_lnid);
1916 }
1917
1918 /**
1919  * qeth_bridgeport_an_set() - Enable or disable bridgeport address notification
1920  * @card:                     qeth_card structure pointer.
1921  * @enable:                   0 - disable, non-zero - enable notifications
1922  *
1923  * Returns negative errno-compatible error indication or 0 on success.
1924  *
1925  * On enable, emits a series of address notifications udev events for all
1926  * currently registered hosts.
1927  */
1928 int qeth_bridgeport_an_set(struct qeth_card *card, int enable)
1929 {
1930         int rc;
1931         u16 response;
1932         struct ccw_device *ddev;
1933         struct subchannel_id schid;
1934
1935         if (!card)
1936                 return -EINVAL;
1937         if (!card->options.sbp.supported_funcs)
1938                 return -EOPNOTSUPP;
1939         ddev = CARD_DDEV(card);
1940         ccw_device_get_schid(ddev, &schid);
1941
1942         if (enable) {
1943                 qeth_bridge_emit_host_event(card, anev_reset, 0, NULL, NULL);
1944                 rc = qdio_pnso_brinfo(schid, 1, &response,
1945                         qeth_bridgeport_an_set_cb, card);
1946         } else
1947                 rc = qdio_pnso_brinfo(schid, 0, &response, NULL, NULL);
1948         return qeth_anset_makerc(card, rc, response);
1949 }
1950
1951 static bool qeth_bridgeport_is_in_use(struct qeth_card *card)
1952 {
1953         return (card->options.sbp.role || card->options.sbp.reflect_promisc ||
1954                 card->options.sbp.hostnotification);
1955 }
1956
1957 /* VNIC Characteristics support */
1958
1959 /* handle VNICC IPA command return codes; convert to error codes */
1960 static int qeth_l2_vnicc_makerc(struct qeth_card *card, int ipa_rc)
1961 {
1962         int rc;
1963
1964         switch (ipa_rc) {
1965         case IPA_RC_SUCCESS:
1966                 return ipa_rc;
1967         case IPA_RC_L2_UNSUPPORTED_CMD:
1968         case IPA_RC_NOTSUPP:
1969                 rc = -EOPNOTSUPP;
1970                 break;
1971         case IPA_RC_VNICC_OOSEQ:
1972                 rc = -EALREADY;
1973                 break;
1974         case IPA_RC_VNICC_VNICBP:
1975                 rc = -EBUSY;
1976                 break;
1977         case IPA_RC_L2_ADDR_TABLE_FULL:
1978                 rc = -ENOSPC;
1979                 break;
1980         case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
1981                 rc = -EACCES;
1982                 break;
1983         default:
1984                 rc = -EIO;
1985         }
1986
1987         QETH_CARD_TEXT_(card, 2, "err%04x", ipa_rc);
1988         return rc;
1989 }
1990
1991 /* generic VNICC request call back control */
1992 struct _qeth_l2_vnicc_request_cbctl {
1993         u32 sub_cmd;
1994         struct {
1995                 u32 vnic_char;
1996                 u32 timeout;
1997         } param;
1998         struct {
1999                 union{
2000                         u32 *sup_cmds;
2001                         u32 *timeout;
2002                 };
2003         } result;
2004 };
2005
2006 /* generic VNICC request call back */
2007 static int qeth_l2_vnicc_request_cb(struct qeth_card *card,
2008                                     struct qeth_reply *reply,
2009                                     unsigned long data)
2010 {
2011         struct _qeth_l2_vnicc_request_cbctl *cbctl =
2012                 (struct _qeth_l2_vnicc_request_cbctl *) reply->param;
2013         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2014         struct qeth_ipacmd_vnicc *rep = &cmd->data.vnicc;
2015
2016         QETH_CARD_TEXT(card, 2, "vniccrcb");
2017         if (cmd->hdr.return_code)
2018                 return 0;
2019         /* return results to caller */
2020         card->options.vnicc.sup_chars = rep->hdr.sup;
2021         card->options.vnicc.cur_chars = rep->hdr.cur;
2022
2023         if (cbctl->sub_cmd == IPA_VNICC_QUERY_CMDS)
2024                 *cbctl->result.sup_cmds = rep->query_cmds.sup_cmds;
2025
2026         if (cbctl->sub_cmd == IPA_VNICC_GET_TIMEOUT)
2027                 *cbctl->result.timeout = rep->getset_timeout.timeout;
2028
2029         return 0;
2030 }
2031
2032 /* generic VNICC request */
2033 static int qeth_l2_vnicc_request(struct qeth_card *card,
2034                                  struct _qeth_l2_vnicc_request_cbctl *cbctl)
2035 {
2036         struct qeth_ipacmd_vnicc *req;
2037         struct qeth_cmd_buffer *iob;
2038         struct qeth_ipa_cmd *cmd;
2039         int rc;
2040
2041         QETH_CARD_TEXT(card, 2, "vniccreq");
2042
2043         /* get new buffer for request */
2044         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_VNICC, 0);
2045         if (!iob)
2046                 return -ENOMEM;
2047
2048         /* create header for request */
2049         cmd = __ipa_cmd(iob);
2050         req = &cmd->data.vnicc;
2051
2052         /* create sub command header for request */
2053         req->sub_hdr.data_length = sizeof(req->sub_hdr);
2054         req->sub_hdr.sub_command = cbctl->sub_cmd;
2055
2056         /* create sub command specific request fields */
2057         switch (cbctl->sub_cmd) {
2058         case IPA_VNICC_QUERY_CHARS:
2059                 break;
2060         case IPA_VNICC_QUERY_CMDS:
2061                 req->sub_hdr.data_length += sizeof(req->query_cmds);
2062                 req->query_cmds.vnic_char = cbctl->param.vnic_char;
2063                 break;
2064         case IPA_VNICC_ENABLE:
2065         case IPA_VNICC_DISABLE:
2066                 req->sub_hdr.data_length += sizeof(req->set_char);
2067                 req->set_char.vnic_char = cbctl->param.vnic_char;
2068                 break;
2069         case IPA_VNICC_SET_TIMEOUT:
2070                 req->getset_timeout.timeout = cbctl->param.timeout;
2071                 /* fallthrough */
2072         case IPA_VNICC_GET_TIMEOUT:
2073                 req->sub_hdr.data_length += sizeof(req->getset_timeout);
2074                 req->getset_timeout.vnic_char = cbctl->param.vnic_char;
2075                 break;
2076         default:
2077                 qeth_release_buffer(iob->channel, iob);
2078                 return -EOPNOTSUPP;
2079         }
2080
2081         /* send request */
2082         rc = qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb,
2083                                (void *) cbctl);
2084
2085         return qeth_l2_vnicc_makerc(card, rc);
2086 }
2087
2088 /* VNICC query VNIC characteristics request */
2089 static int qeth_l2_vnicc_query_chars(struct qeth_card *card)
2090 {
2091         struct _qeth_l2_vnicc_request_cbctl cbctl;
2092
2093         /* prepare callback control */
2094         cbctl.sub_cmd = IPA_VNICC_QUERY_CHARS;
2095
2096         QETH_CARD_TEXT(card, 2, "vniccqch");
2097         return qeth_l2_vnicc_request(card, &cbctl);
2098 }
2099
2100 /* VNICC query sub commands request */
2101 static int qeth_l2_vnicc_query_cmds(struct qeth_card *card, u32 vnic_char,
2102                                     u32 *sup_cmds)
2103 {
2104         struct _qeth_l2_vnicc_request_cbctl cbctl;
2105
2106         /* prepare callback control */
2107         cbctl.sub_cmd = IPA_VNICC_QUERY_CMDS;
2108         cbctl.param.vnic_char = vnic_char;
2109         cbctl.result.sup_cmds = sup_cmds;
2110
2111         QETH_CARD_TEXT(card, 2, "vniccqcm");
2112         return qeth_l2_vnicc_request(card, &cbctl);
2113 }
2114
2115 /* VNICC enable/disable characteristic request */
2116 static int qeth_l2_vnicc_set_char(struct qeth_card *card, u32 vnic_char,
2117                                       u32 cmd)
2118 {
2119         struct _qeth_l2_vnicc_request_cbctl cbctl;
2120
2121         /* prepare callback control */
2122         cbctl.sub_cmd = cmd;
2123         cbctl.param.vnic_char = vnic_char;
2124
2125         QETH_CARD_TEXT(card, 2, "vniccedc");
2126         return qeth_l2_vnicc_request(card, &cbctl);
2127 }
2128
2129 /* VNICC get/set timeout for characteristic request */
2130 static int qeth_l2_vnicc_getset_timeout(struct qeth_card *card, u32 vnicc,
2131                                         u32 cmd, u32 *timeout)
2132 {
2133         struct _qeth_l2_vnicc_request_cbctl cbctl;
2134
2135         /* prepare callback control */
2136         cbctl.sub_cmd = cmd;
2137         cbctl.param.vnic_char = vnicc;
2138         if (cmd == IPA_VNICC_SET_TIMEOUT)
2139                 cbctl.param.timeout = *timeout;
2140         if (cmd == IPA_VNICC_GET_TIMEOUT)
2141                 cbctl.result.timeout = timeout;
2142
2143         QETH_CARD_TEXT(card, 2, "vniccgst");
2144         return qeth_l2_vnicc_request(card, &cbctl);
2145 }
2146
2147 /* set current VNICC flag state; called from sysfs store function */
2148 int qeth_l2_vnicc_set_state(struct qeth_card *card, u32 vnicc, bool state)
2149 {
2150         int rc = 0;
2151         u32 cmd;
2152
2153         QETH_CARD_TEXT(card, 2, "vniccsch");
2154
2155         /* check if characteristic and enable/disable are supported */
2156         if (!(card->options.vnicc.sup_chars & vnicc) ||
2157             !(card->options.vnicc.set_char_sup & vnicc))
2158                 return -EOPNOTSUPP;
2159
2160         if (qeth_bridgeport_is_in_use(card))
2161                 return -EBUSY;
2162
2163         /* set enable/disable command and store wanted characteristic */
2164         if (state) {
2165                 cmd = IPA_VNICC_ENABLE;
2166                 card->options.vnicc.wanted_chars |= vnicc;
2167         } else {
2168                 cmd = IPA_VNICC_DISABLE;
2169                 card->options.vnicc.wanted_chars &= ~vnicc;
2170         }
2171
2172         /* do we need to do anything? */
2173         if (card->options.vnicc.cur_chars == card->options.vnicc.wanted_chars)
2174                 return rc;
2175
2176         /* if card is not ready, simply stop here */
2177         if (!qeth_card_hw_is_reachable(card)) {
2178                 if (state)
2179                         card->options.vnicc.cur_chars |= vnicc;
2180                 else
2181                         card->options.vnicc.cur_chars &= ~vnicc;
2182                 return rc;
2183         }
2184
2185         rc = qeth_l2_vnicc_set_char(card, vnicc, cmd);
2186         if (rc)
2187                 card->options.vnicc.wanted_chars =
2188                         card->options.vnicc.cur_chars;
2189         else {
2190                 /* successful online VNICC change; handle special cases */
2191                 if (state && vnicc == QETH_VNICC_RX_BCAST)
2192                         card->options.vnicc.rx_bcast_enabled = true;
2193                 if (!state && vnicc == QETH_VNICC_LEARNING)
2194                         qeth_l2_vnicc_recover_timeout(card, vnicc,
2195                                         &card->options.vnicc.learning_timeout);
2196         }
2197
2198         return rc;
2199 }
2200
2201 /* get current VNICC flag state; called from sysfs show function */
2202 int qeth_l2_vnicc_get_state(struct qeth_card *card, u32 vnicc, bool *state)
2203 {
2204         int rc = 0;
2205
2206         QETH_CARD_TEXT(card, 2, "vniccgch");
2207
2208         /* check if characteristic is supported */
2209         if (!(card->options.vnicc.sup_chars & vnicc))
2210                 return -EOPNOTSUPP;
2211
2212         if (qeth_bridgeport_is_in_use(card))
2213                 return -EBUSY;
2214
2215         /* if card is ready, query current VNICC state */
2216         if (qeth_card_hw_is_reachable(card))
2217                 rc = qeth_l2_vnicc_query_chars(card);
2218
2219         *state = (card->options.vnicc.cur_chars & vnicc) ? true : false;
2220         return rc;
2221 }
2222
2223 /* set VNICC timeout; called from sysfs store function. Currently, only learning
2224  * supports timeout
2225  */
2226 int qeth_l2_vnicc_set_timeout(struct qeth_card *card, u32 timeout)
2227 {
2228         int rc = 0;
2229
2230         QETH_CARD_TEXT(card, 2, "vniccsto");
2231
2232         /* check if characteristic and set_timeout are supported */
2233         if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
2234             !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
2235                 return -EOPNOTSUPP;
2236
2237         if (qeth_bridgeport_is_in_use(card))
2238                 return -EBUSY;
2239
2240         /* do we need to do anything? */
2241         if (card->options.vnicc.learning_timeout == timeout)
2242                 return rc;
2243
2244         /* if card is not ready, simply store the value internally and return */
2245         if (!qeth_card_hw_is_reachable(card)) {
2246                 card->options.vnicc.learning_timeout = timeout;
2247                 return rc;
2248         }
2249
2250         /* send timeout value to card; if successful, store value internally */
2251         rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
2252                                           IPA_VNICC_SET_TIMEOUT, &timeout);
2253         if (!rc)
2254                 card->options.vnicc.learning_timeout = timeout;
2255
2256         return rc;
2257 }
2258
2259 /* get current VNICC timeout; called from sysfs show function. Currently, only
2260  * learning supports timeout
2261  */
2262 int qeth_l2_vnicc_get_timeout(struct qeth_card *card, u32 *timeout)
2263 {
2264         int rc = 0;
2265
2266         QETH_CARD_TEXT(card, 2, "vniccgto");
2267
2268         /* check if characteristic and get_timeout are supported */
2269         if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
2270             !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
2271                 return -EOPNOTSUPP;
2272
2273         if (qeth_bridgeport_is_in_use(card))
2274                 return -EBUSY;
2275
2276         /* if card is ready, get timeout. Otherwise, just return stored value */
2277         *timeout = card->options.vnicc.learning_timeout;
2278         if (qeth_card_hw_is_reachable(card))
2279                 rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
2280                                                   IPA_VNICC_GET_TIMEOUT,
2281                                                   timeout);
2282
2283         return rc;
2284 }
2285
2286 /* check if VNICC is currently enabled */
2287 bool qeth_l2_vnicc_is_in_use(struct qeth_card *card)
2288 {
2289         if (!card->options.vnicc.sup_chars)
2290                 return false;
2291         /* default values are only OK if rx_bcast was not enabled by user
2292          * or the card is offline.
2293          */
2294         if (card->options.vnicc.cur_chars == QETH_VNICC_DEFAULT) {
2295                 if (!card->options.vnicc.rx_bcast_enabled ||
2296                     !qeth_card_hw_is_reachable(card))
2297                         return false;
2298         }
2299         return true;
2300 }
2301
2302 /* recover user timeout setting */
2303 static bool qeth_l2_vnicc_recover_timeout(struct qeth_card *card, u32 vnicc,
2304                                           u32 *timeout)
2305 {
2306         if (card->options.vnicc.sup_chars & vnicc &&
2307             card->options.vnicc.getset_timeout_sup & vnicc &&
2308             !qeth_l2_vnicc_getset_timeout(card, vnicc, IPA_VNICC_SET_TIMEOUT,
2309                                           timeout))
2310                 return false;
2311         *timeout = QETH_VNICC_DEFAULT_TIMEOUT;
2312         return true;
2313 }
2314
2315 /* recover user characteristic setting */
2316 static bool qeth_l2_vnicc_recover_char(struct qeth_card *card, u32 vnicc,
2317                                        bool enable)
2318 {
2319         u32 cmd = enable ? IPA_VNICC_ENABLE : IPA_VNICC_DISABLE;
2320
2321         if (card->options.vnicc.sup_chars & vnicc &&
2322             card->options.vnicc.set_char_sup & vnicc &&
2323             !qeth_l2_vnicc_set_char(card, vnicc, cmd))
2324                 return false;
2325         card->options.vnicc.wanted_chars &= ~vnicc;
2326         card->options.vnicc.wanted_chars |= QETH_VNICC_DEFAULT & vnicc;
2327         return true;
2328 }
2329
2330 /* (re-)initialize VNICC */
2331 static void qeth_l2_vnicc_init(struct qeth_card *card)
2332 {
2333         u32 *timeout = &card->options.vnicc.learning_timeout;
2334         bool enable, error = false;
2335         unsigned int chars_len, i;
2336         unsigned long chars_tmp;
2337         u32 sup_cmds, vnicc;
2338
2339         QETH_CARD_TEXT(card, 2, "vniccini");
2340         /* reset rx_bcast */
2341         card->options.vnicc.rx_bcast_enabled = 0;
2342         /* initial query and storage of VNIC characteristics */
2343         if (qeth_l2_vnicc_query_chars(card)) {
2344                 if (card->options.vnicc.wanted_chars != QETH_VNICC_DEFAULT ||
2345                     *timeout != QETH_VNICC_DEFAULT_TIMEOUT)
2346                         dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
2347                 /* fail quietly if user didn't change the default config */
2348                 card->options.vnicc.sup_chars = 0;
2349                 card->options.vnicc.cur_chars = 0;
2350                 card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
2351                 return;
2352         }
2353         /* get supported commands for each supported characteristic */
2354         chars_tmp = card->options.vnicc.sup_chars;
2355         chars_len = sizeof(card->options.vnicc.sup_chars) * BITS_PER_BYTE;
2356         for_each_set_bit(i, &chars_tmp, chars_len) {
2357                 vnicc = BIT(i);
2358                 if (qeth_l2_vnicc_query_cmds(card, vnicc, &sup_cmds)) {
2359                         sup_cmds = 0;
2360                         error = true;
2361                 }
2362                 if ((sup_cmds & IPA_VNICC_SET_TIMEOUT) &&
2363                     (sup_cmds & IPA_VNICC_GET_TIMEOUT))
2364                         card->options.vnicc.getset_timeout_sup |= vnicc;
2365                 else
2366                         card->options.vnicc.getset_timeout_sup &= ~vnicc;
2367                 if ((sup_cmds & IPA_VNICC_ENABLE) &&
2368                     (sup_cmds & IPA_VNICC_DISABLE))
2369                         card->options.vnicc.set_char_sup |= vnicc;
2370                 else
2371                         card->options.vnicc.set_char_sup &= ~vnicc;
2372         }
2373         /* enforce assumed default values and recover settings, if changed  */
2374         error |= qeth_l2_vnicc_recover_timeout(card, QETH_VNICC_LEARNING,
2375                                                timeout);
2376         chars_tmp = card->options.vnicc.wanted_chars ^ QETH_VNICC_DEFAULT;
2377         chars_len = sizeof(card->options.vnicc.wanted_chars) * BITS_PER_BYTE;
2378         for_each_set_bit(i, &chars_tmp, chars_len) {
2379                 vnicc = BIT(i);
2380                 enable = card->options.vnicc.wanted_chars & vnicc;
2381                 error |= qeth_l2_vnicc_recover_char(card, vnicc, enable);
2382         }
2383         if (error)
2384                 dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
2385 }
2386
2387 /* configure default values of VNIC characteristics */
2388 static void qeth_l2_vnicc_set_defaults(struct qeth_card *card)
2389 {
2390         /* characteristics values */
2391         card->options.vnicc.sup_chars = QETH_VNICC_ALL;
2392         card->options.vnicc.cur_chars = QETH_VNICC_DEFAULT;
2393         card->options.vnicc.learning_timeout = QETH_VNICC_DEFAULT_TIMEOUT;
2394         /* supported commands */
2395         card->options.vnicc.set_char_sup = QETH_VNICC_ALL;
2396         card->options.vnicc.getset_timeout_sup = QETH_VNICC_LEARNING;
2397         /* settings wanted by users */
2398         card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
2399 }
2400
2401 module_init(qeth_l2_init);
2402 module_exit(qeth_l2_exit);
2403 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
2404 MODULE_DESCRIPTION("qeth layer 2 discipline");
2405 MODULE_LICENSE("GPL");