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 int qeth_setdelmac_makerc(struct qeth_card *card, int retcode)
  40 {
  41         int rc;
  42
  43         if (retcode)
  44                 QETH_CARD_TEXT_(card, 2, "err%04x", retcode);
  45         switch (retcode) {
  46         case IPA_RC_SUCCESS:
  47                 rc = 0;
  48                 break;
  49         case IPA_RC_L2_UNSUPPORTED_CMD:
  50                 rc = -EOPNOTSUPP;
  51                 break;
  52         case IPA_RC_L2_ADDR_TABLE_FULL:
  53                 rc = -ENOSPC;
  54                 break;
  55         case IPA_RC_L2_DUP_MAC:
  56         case IPA_RC_L2_DUP_LAYER3_MAC:
  57                 rc = -EEXIST;
  58                 break;
  59         case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
  60         case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
  61                 rc = -EPERM;
  62                 break;
  63         case IPA_RC_L2_MAC_NOT_FOUND:
  64                 rc = -ENOENT;
  65                 break;
  66         case -ENOMEM:
  67                 rc = -ENOMEM;
  68                 break;
  69         default:
  70                 rc = -EIO;
  71                 break;
  72         }
  73         return rc;
  74 }
  75
  76 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
  77                            enum qeth_ipa_cmds ipacmd)
  78 {
  79         struct qeth_ipa_cmd *cmd;
  80         struct qeth_cmd_buffer *iob;
  81
  82         QETH_CARD_TEXT(card, 2, "L2sdmac");
  83         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
  84         if (!iob)
  85                 return -ENOMEM;
  86         cmd = __ipa_cmd(iob);
  87         cmd->data.setdelmac.mac_length = ETH_ALEN;
  88         ether_addr_copy(cmd->data.setdelmac.mac, mac);
  89         return qeth_setdelmac_makerc(card, qeth_send_ipa_cmd(card, iob,
  90                                            NULL, NULL));
  91 }
  92
  93 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
  94 {
  95         int rc;
  96
  97         QETH_CARD_TEXT(card, 2, "L2Setmac");
  98         rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC);
  99         if (rc == 0) {
 100                 dev_info(&card->gdev->dev,
 101                          "MAC address %pM successfully registered on device %s\n",
 102                          mac, card->dev->name);
 103         } else {
 104                 switch (rc) {
 105                 case -EEXIST:
 106                         dev_warn(&card->gdev->dev,
 107                                 "MAC address %pM already exists\n", mac);
 108                         break;
 109                 case -EPERM:
 110                         dev_warn(&card->gdev->dev,
 111                                 "MAC address %pM is not authorized\n", mac);
 112                         break;
 113                 }
 114         }
 115         return rc;
 116 }
 117
 118 static int qeth_l2_write_mac(struct qeth_card *card, u8 *mac)
 119 {
 120         enum qeth_ipa_cmds cmd = is_multicast_ether_addr(mac) ?
 121                                         IPA_CMD_SETGMAC : IPA_CMD_SETVMAC;
 122         int rc;
 123
 124         QETH_CARD_TEXT(card, 2, "L2Wmac");
 125         rc = qeth_l2_send_setdelmac(card, mac, cmd);
 126         if (rc == -EEXIST)
 127                 QETH_DBF_MESSAGE(2, "MAC already registered on device %x\n",
 128                                  CARD_DEVID(card));
 129         else if (rc)
 130                 QETH_DBF_MESSAGE(2, "Failed to register MAC on device %x: %d\n",
 131                                  CARD_DEVID(card), rc);
 132         return rc;
 133 }
 134
 135 static int qeth_l2_remove_mac(struct qeth_card *card, u8 *mac)
 136 {
 137         enum qeth_ipa_cmds cmd = is_multicast_ether_addr(mac) ?
 138                                         IPA_CMD_DELGMAC : IPA_CMD_DELVMAC;
 139         int rc;
 140
 141         QETH_CARD_TEXT(card, 2, "L2Rmac");
 142         rc = qeth_l2_send_setdelmac(card, mac, cmd);
 143         if (rc)
 144                 QETH_DBF_MESSAGE(2, "Failed to delete MAC on device %u: %d\n",
 145                                  CARD_DEVID(card), rc);
 146         return rc;
 147 }
 148
 149 static void qeth_l2_del_all_macs(struct qeth_card *card)
 150 {
 151         struct qeth_mac *mac;
 152         struct hlist_node *tmp;
 153         int i;
 154
 155         spin_lock_bh(&card->mclock);
 156         hash_for_each_safe(card->mac_htable, i, tmp, mac, hnode) {
 157                 hash_del(&mac->hnode);
 158                 kfree(mac);
 159         }
 160         spin_unlock_bh(&card->mclock);
 161 }
 162
 163 static int qeth_l2_get_cast_type(struct qeth_card *card, struct sk_buff *skb)
 164 {
 165         if (card->info.type == QETH_CARD_TYPE_OSN)
 166                 return RTN_UNICAST;
 167         if (is_broadcast_ether_addr(skb->data))
 168                 return RTN_BROADCAST;
 169         if (is_multicast_ether_addr(skb->data))
 170                 return RTN_MULTICAST;
 171         return RTN_UNICAST;
 172 }
 173
 174 static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
 175                                 struct sk_buff *skb, int ipv, int cast_type,
 176                                 unsigned int data_len)
 177 {
 178         struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
 179
 180         hdr->hdr.l2.pkt_length = data_len;
 181
 182         if (skb_is_gso(skb)) {
 183                 hdr->hdr.l2.id = QETH_HEADER_TYPE_L2_TSO;
 184         } else {
 185                 hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
 186                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
 187                         qeth_tx_csum(skb, &hdr->hdr.l2.flags[1], ipv);
 188                         if (card->options.performance_stats)
 189                                 card->perf_stats.tx_csum++;
 190                 }
 191         }
 192
 193         /* set byte byte 3 to casting flags */
 194         if (cast_type == RTN_MULTICAST)
 195                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 196         else if (cast_type == RTN_BROADCAST)
 197                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 198         else
 199                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 200
 201         /* VSWITCH relies on the VLAN
 202          * information to be present in
 203          * the QDIO header */
 204         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
 205                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
 206                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
 207         }
 208 }
 209
 210 static int qeth_setdelvlan_makerc(struct qeth_card *card, int retcode)
 211 {
 212         if (retcode)
 213                 QETH_CARD_TEXT_(card, 2, "err%04x", retcode);
 214
 215         switch (retcode) {
 216         case IPA_RC_SUCCESS:
 217                 return 0;
 218         case IPA_RC_L2_INVALID_VLAN_ID:
 219                 return -EINVAL;
 220         case IPA_RC_L2_DUP_VLAN_ID:
 221                 return -EEXIST;
 222         case IPA_RC_L2_VLAN_ID_NOT_FOUND:
 223                 return -ENOENT;
 224         case IPA_RC_L2_VLAN_ID_NOT_ALLOWED:
 225                 return -EPERM;
 226         case -ENOMEM:
 227                 return -ENOMEM;
 228         default:
 229                 return -EIO;
 230         }
 231 }
 232
 233 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
 234                                       struct qeth_reply *reply,
 235                                       unsigned long data)
 236 {
 237         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
 238
 239         QETH_CARD_TEXT(card, 2, "L2sdvcb");
 240         if (cmd->hdr.return_code) {
 241                 QETH_DBF_MESSAGE(2, "Error in processing VLAN %u on device %x: %#x.\n",
 242                                  cmd->data.setdelvlan.vlan_id,
 243                                  CARD_DEVID(card), cmd->hdr.return_code);
 244                 QETH_CARD_TEXT_(card, 2, "L2VL%4x", cmd->hdr.command);
 245                 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code);
 246         }
 247         return 0;
 248 }
 249
 250 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
 251                                    enum qeth_ipa_cmds ipacmd)
 252 {
 253         struct qeth_ipa_cmd *cmd;
 254         struct qeth_cmd_buffer *iob;
 255
 256         QETH_CARD_TEXT_(card, 4, "L2sdv%x", ipacmd);
 257         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 258         if (!iob)
 259                 return -ENOMEM;
 260         cmd = __ipa_cmd(iob);
 261         cmd->data.setdelvlan.vlan_id = i;
 262         return qeth_setdelvlan_makerc(card, qeth_send_ipa_cmd(card, iob,
 263                                             qeth_l2_send_setdelvlan_cb, NULL));
 264 }
 265
 266 static void qeth_l2_process_vlans(struct qeth_card *card)
 267 {
 268         struct qeth_vlan_vid *id;
 269
 270         QETH_CARD_TEXT(card, 3, "L2prcvln");
 271         mutex_lock(&card->vid_list_mutex);
 272         list_for_each_entry(id, &card->vid_list, list) {
 273                 qeth_l2_send_setdelvlan(card, id->vid, IPA_CMD_SETVLAN);
 274         }
 275         mutex_unlock(&card->vid_list_mutex);
 276 }
 277
 278 static int qeth_l2_vlan_rx_add_vid(struct net_device *dev,
 279                                    __be16 proto, u16 vid)
 280 {
 281         struct qeth_card *card = dev->ml_priv;
 282         struct qeth_vlan_vid *id;
 283         int rc;
 284
 285         QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
 286         if (!vid)
 287                 return 0;
 288         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 289                 QETH_CARD_TEXT(card, 3, "aidREC");
 290                 return 0;
 291         }
 292         id = kmalloc(sizeof(*id), GFP_KERNEL);
 293         if (id) {
 294                 id->vid = vid;
 295                 rc = qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
 296                 if (rc) {
 297                         kfree(id);
 298                         return rc;
 299                 }
 300                 mutex_lock(&card->vid_list_mutex);
 301                 list_add_tail(&id->list, &card->vid_list);
 302                 mutex_unlock(&card->vid_list_mutex);
 303         } else {
 304                 return -ENOMEM;
 305         }
 306         return 0;
 307 }
 308
 309 static int qeth_l2_vlan_rx_kill_vid(struct net_device *dev,
 310                                     __be16 proto, u16 vid)
 311 {
 312         struct qeth_vlan_vid *id, *tmpid = NULL;
 313         struct qeth_card *card = dev->ml_priv;
 314         int rc = 0;
 315
 316         QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
 317         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 318                 QETH_CARD_TEXT(card, 3, "kidREC");
 319                 return 0;
 320         }
 321         mutex_lock(&card->vid_list_mutex);
 322         list_for_each_entry(id, &card->vid_list, list) {
 323                 if (id->vid == vid) {
 324                         list_del(&id->list);
 325                         tmpid = id;
 326                         break;
 327                 }
 328         }
 329         mutex_unlock(&card->vid_list_mutex);
 330         if (tmpid) {
 331                 rc = qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 332                 kfree(tmpid);
 333         }
 334         return rc;
 335 }
 336
 337 static void qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
 338 {
 339         QETH_DBF_TEXT(SETUP , 2, "stopcard");
 340         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 341
 342         qeth_set_allowed_threads(card, 0, 1);
 343         if (card->read.state == CH_STATE_UP &&
 344             card->write.state == CH_STATE_UP &&
 345             (card->state == CARD_STATE_UP)) {
 346                 if (recovery_mode &&
 347                     card->info.type != QETH_CARD_TYPE_OSN) {
 348                         qeth_l2_stop(card->dev);
 349                 } else {
 350                         rtnl_lock();
 351                         dev_close(card->dev);
 352                         rtnl_unlock();
 353                 }
 354                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 355                 card->state = CARD_STATE_SOFTSETUP;
 356         }
 357         if (card->state == CARD_STATE_SOFTSETUP) {
 358                 qeth_l2_del_all_macs(card);
 359                 qeth_clear_ipacmd_list(card);
 360                 card->state = CARD_STATE_HARDSETUP;
 361         }
 362         if (card->state == CARD_STATE_HARDSETUP) {
 363                 qeth_qdio_clear_card(card, 0);
 364                 qeth_clear_qdio_buffers(card);
 365                 qeth_clear_working_pool_list(card);
 366                 card->state = CARD_STATE_DOWN;
 367         }
 368         if (card->state == CARD_STATE_DOWN) {
 369                 qeth_clear_cmd_buffers(&card->read);
 370                 qeth_clear_cmd_buffers(&card->write);
 371         }
 372 }
 373
 374 static int qeth_l2_process_inbound_buffer(struct qeth_card *card,
 375                                 int budget, int *done)
 376 {
 377         int work_done = 0;
 378         struct sk_buff *skb;
 379         struct qeth_hdr *hdr;
 380         unsigned int len;
 381
 382         *done = 0;
 383         WARN_ON_ONCE(!budget);
 384         while (budget) {
 385                 skb = qeth_core_get_next_skb(card,
 386                         &card->qdio.in_q->bufs[card->rx.b_index],
 387                         &card->rx.b_element, &card->rx.e_offset, &hdr);
 388                 if (!skb) {
 389                         *done = 1;
 390                         break;
 391                 }
 392                 switch (hdr->hdr.l2.id) {
 393                 case QETH_HEADER_TYPE_LAYER2:
 394                         skb->protocol = eth_type_trans(skb, skb->dev);
 395                         qeth_rx_csum(card, skb, hdr->hdr.l2.flags[1]);
 396                         if (skb->protocol == htons(ETH_P_802_2))
 397                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
 398                         len = skb->len;
 399                         napi_gro_receive(&card->napi, skb);
 400                         break;
 401                 case QETH_HEADER_TYPE_OSN:
 402                         if (card->info.type == QETH_CARD_TYPE_OSN) {
 403                                 skb_push(skb, sizeof(struct qeth_hdr));
 404                                 skb_copy_to_linear_data(skb, hdr,
 405                                                 sizeof(struct qeth_hdr));
 406                                 len = skb->len;
 407                                 card->osn_info.data_cb(skb);
 408                                 break;
 409                         }
 410                         /* else unknown */
 411                 default:
 412                         dev_kfree_skb_any(skb);
 413                         QETH_CARD_TEXT(card, 3, "inbunkno");
 414                         QETH_DBF_HEX(CTRL, 3, hdr, sizeof(*hdr));
 415                         continue;
 416                 }
 417                 work_done++;
 418                 budget--;
 419                 card->stats.rx_packets++;
 420                 card->stats.rx_bytes += len;
 421         }
 422         return work_done;
 423 }
 424
 425 static int qeth_l2_request_initial_mac(struct qeth_card *card)
 426 {
 427         int rc = 0;
 428
 429         QETH_DBF_TEXT(SETUP, 2, "l2reqmac");
 430         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
 431
 432         if (MACHINE_IS_VM) {
 433                 rc = qeth_vm_request_mac(card);
 434                 if (!rc)
 435                         goto out;
 436                 QETH_DBF_MESSAGE(2, "z/VM MAC Service failed on device %x: %#x\n",
 437                                  CARD_DEVID(card), rc);
 438                 QETH_DBF_TEXT_(SETUP, 2, "err%04x", rc);
 439                 /* fall back to alternative mechanism: */
 440         }
 441
 442         if (!IS_OSN(card)) {
 443                 rc = qeth_setadpparms_change_macaddr(card);
 444                 if (!rc && is_valid_ether_addr(card->dev->dev_addr))
 445                         goto out;
 446                 QETH_DBF_MESSAGE(2, "READ_MAC Assist failed on device %x: %#x\n",
 447                                  CARD_DEVID(card), rc);
 448                 QETH_DBF_TEXT_(SETUP, 2, "1err%04x", rc);
 449                 /* fall back once more: */
 450         }
 451
 452         /* some devices don't support a custom MAC address: */
 453         if (card->info.type == QETH_CARD_TYPE_OSM ||
 454             card->info.type == QETH_CARD_TYPE_OSX)
 455                 return (rc) ? rc : -EADDRNOTAVAIL;
 456         eth_hw_addr_random(card->dev);
 457
 458 out:
 459         QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, card->dev->addr_len);
 460         return 0;
 461 }
 462
 463 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 464 {
 465         struct sockaddr *addr = p;
 466         struct qeth_card *card = dev->ml_priv;
 467         u8 old_addr[ETH_ALEN];
 468         int rc = 0;
 469
 470         QETH_CARD_TEXT(card, 3, "setmac");
 471
 472         if (card->info.type == QETH_CARD_TYPE_OSN ||
 473             card->info.type == QETH_CARD_TYPE_OSM ||
 474             card->info.type == QETH_CARD_TYPE_OSX) {
 475                 QETH_CARD_TEXT(card, 3, "setmcTYP");
 476                 return -EOPNOTSUPP;
 477         }
 478         QETH_CARD_HEX(card, 3, addr->sa_data, ETH_ALEN);
 479         if (!is_valid_ether_addr(addr->sa_data))
 480                 return -EADDRNOTAVAIL;
 481
 482         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 483                 QETH_CARD_TEXT(card, 3, "setmcREC");
 484                 return -ERESTARTSYS;
 485         }
 486
 487         /* avoid racing against concurrent state change: */
 488         if (!mutex_trylock(&card->conf_mutex))
 489                 return -EAGAIN;
 490
 491         if (!qeth_card_hw_is_reachable(card)) {
 492                 ether_addr_copy(dev->dev_addr, addr->sa_data);
 493                 goto out_unlock;
 494         }
 495
 496         /* don't register the same address twice */
 497         if (ether_addr_equal_64bits(dev->dev_addr, addr->sa_data) &&
 498             (card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
 499                 goto out_unlock;
 500
 501         /* add the new address, switch over, drop the old */
 502         rc = qeth_l2_send_setmac(card, addr->sa_data);
 503         if (rc)
 504                 goto out_unlock;
 505         ether_addr_copy(old_addr, dev->dev_addr);
 506         ether_addr_copy(dev->dev_addr, addr->sa_data);
 507
 508         if (card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED)
 509                 qeth_l2_remove_mac(card, old_addr);
 510         card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 511
 512 out_unlock:
 513         mutex_unlock(&card->conf_mutex);
 514         return rc;
 515 }
 516
 517 static void qeth_promisc_to_bridge(struct qeth_card *card)
 518 {
 519         struct net_device *dev = card->dev;
 520         enum qeth_ipa_promisc_modes promisc_mode;
 521         int role;
 522         int rc;
 523
 524         QETH_CARD_TEXT(card, 3, "pmisc2br");
 525
 526         if (!card->options.sbp.reflect_promisc)
 527                 return;
 528         promisc_mode = (dev->flags & IFF_PROMISC) ? SET_PROMISC_MODE_ON
 529                                                 : SET_PROMISC_MODE_OFF;
 530         if (promisc_mode == card->info.promisc_mode)
 531                 return;
 532
 533         if (promisc_mode == SET_PROMISC_MODE_ON) {
 534                 if (card->options.sbp.reflect_promisc_primary)
 535                         role = QETH_SBP_ROLE_PRIMARY;
 536                 else
 537                         role = QETH_SBP_ROLE_SECONDARY;
 538         } else
 539                 role = QETH_SBP_ROLE_NONE;
 540
 541         rc = qeth_bridgeport_setrole(card, role);
 542         QETH_DBF_TEXT_(SETUP, 2, "bpm%c%04x",
 543                         (promisc_mode == SET_PROMISC_MODE_ON) ? '+' : '-', rc);
 544         if (!rc) {
 545                 card->options.sbp.role = role;
 546                 card->info.promisc_mode = promisc_mode;
 547         }
 548
 549 }
 550 /* New MAC address is added to the hash table and marked to be written on card
 551  * only if there is not in the hash table storage already
 552  *
 553 */
 554 static void qeth_l2_add_mac(struct qeth_card *card, struct netdev_hw_addr *ha)
 555 {
 556         u32 mac_hash = get_unaligned((u32 *)(&ha->addr[2]));
 557         struct qeth_mac *mac;
 558
 559         hash_for_each_possible(card->mac_htable, mac, hnode, mac_hash) {
 560                 if (ether_addr_equal_64bits(ha->addr, mac->mac_addr)) {
 561                         mac->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
 562                         return;
 563                 }
 564         }
 565
 566         mac = kzalloc(sizeof(struct qeth_mac), GFP_ATOMIC);
 567         if (!mac)
 568                 return;
 569
 570         ether_addr_copy(mac->mac_addr, ha->addr);
 571         mac->disp_flag = QETH_DISP_ADDR_ADD;
 572
 573         hash_add(card->mac_htable, &mac->hnode, mac_hash);
 574 }
 575
 576 static void qeth_l2_set_rx_mode(struct net_device *dev)
 577 {
 578         struct qeth_card *card = dev->ml_priv;
 579         struct netdev_hw_addr *ha;
 580         struct qeth_mac *mac;
 581         struct hlist_node *tmp;
 582         int i;
 583         int rc;
 584
 585         if (card->info.type == QETH_CARD_TYPE_OSN)
 586                 return;
 587
 588         QETH_CARD_TEXT(card, 3, "setmulti");
 589         if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
 590             (card->state != CARD_STATE_UP))
 591                 return;
 592
 593         spin_lock_bh(&card->mclock);
 594
 595         netdev_for_each_mc_addr(ha, dev)
 596                 qeth_l2_add_mac(card, ha);
 597         netdev_for_each_uc_addr(ha, dev)
 598                 qeth_l2_add_mac(card, ha);
 599
 600         hash_for_each_safe(card->mac_htable, i, tmp, mac, hnode) {
 601                 switch (mac->disp_flag) {
 602                 case QETH_DISP_ADDR_DELETE:
 603                         qeth_l2_remove_mac(card, mac->mac_addr);
 604                         hash_del(&mac->hnode);
 605                         kfree(mac);
 606                         break;
 607                 case QETH_DISP_ADDR_ADD:
 608                         rc = qeth_l2_write_mac(card, mac->mac_addr);
 609                         if (rc) {
 610                                 hash_del(&mac->hnode);
 611                                 kfree(mac);
 612                                 break;
 613                         }
 614                         /* fall through */
 615                 default:
 616                         /* for next call to set_rx_mode(): */
 617                         mac->disp_flag = QETH_DISP_ADDR_DELETE;
 618                 }
 619         }
 620
 621         spin_unlock_bh(&card->mclock);
 622
 623         if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
 624                 qeth_setadp_promisc_mode(card);
 625         else
 626                 qeth_promisc_to_bridge(card);
 627 }
 628
 629 static int qeth_l2_xmit_osn(struct qeth_card *card, struct sk_buff *skb,
 630                             struct qeth_qdio_out_q *queue)
 631 {
 632         struct qeth_hdr *hdr = (struct qeth_hdr *)skb->data;
 633         addr_t end = (addr_t)(skb->data + sizeof(*hdr));
 634         addr_t start = (addr_t)skb->data;
 635         unsigned int elements = 0;
 636         unsigned int hd_len = 0;
 637         int rc;
 638
 639         if (skb->protocol == htons(ETH_P_IPV6))
 640                 return -EPROTONOSUPPORT;
 641
 642         if (qeth_get_elements_for_range(start, end) > 1) {
 643                 /* Misaligned HW header, move it to its own buffer element. */
 644                 hdr = kmem_cache_alloc(qeth_core_header_cache, GFP_ATOMIC);
 645                 if (!hdr)
 646                         return -ENOMEM;
 647                 hd_len = sizeof(*hdr);
 648                 skb_copy_from_linear_data(skb, (char *)hdr, hd_len);
 649                 elements++;
 650         }
 651
 652         elements += qeth_count_elements(skb, hd_len);
 653         if (elements > QETH_MAX_BUFFER_ELEMENTS(card)) {
 654                 rc = -E2BIG;
 655                 goto out;
 656         }
 657
 658         rc = qeth_do_send_packet(card, queue, skb, hdr, hd_len, hd_len,
 659                                  elements);
 660 out:
 661         if (rc && hd_len)
 662                 kmem_cache_free(qeth_core_header_cache, hdr);
 663         return rc;
 664 }
 665
 666 static netdev_tx_t qeth_l2_hard_start_xmit(struct sk_buff *skb,
 667                                            struct net_device *dev)
 668 {
 669         struct qeth_card *card = dev->ml_priv;
 670         int cast_type = qeth_l2_get_cast_type(card, skb);
 671         int ipv = qeth_get_ip_version(skb);
 672         struct qeth_qdio_out_q *queue;
 673         int tx_bytes = skb->len;
 674         int rc;
 675
 676         if (card->state != CARD_STATE_UP) {
 677                 card->stats.tx_carrier_errors++;
 678                 goto tx_drop;
 679         }
 680
 681         queue = qeth_get_tx_queue(card, skb, ipv, cast_type);
 682
 683         if (card->options.performance_stats) {
 684                 card->perf_stats.outbound_cnt++;
 685                 card->perf_stats.outbound_start_time = qeth_get_micros();
 686         }
 687         netif_stop_queue(dev);
 688
 689         if (IS_OSN(card))
 690                 rc = qeth_l2_xmit_osn(card, skb, queue);
 691         else
 692                 rc = qeth_xmit(card, skb, queue, ipv, cast_type,
 693                                qeth_l2_fill_header);
 694
 695         if (!rc) {
 696                 card->stats.tx_packets++;
 697                 card->stats.tx_bytes += tx_bytes;
 698                 if (card->options.performance_stats)
 699                         card->perf_stats.outbound_time += qeth_get_micros() -
 700                                 card->perf_stats.outbound_start_time;
 701                 netif_wake_queue(dev);
 702                 return NETDEV_TX_OK;
 703         } else if (rc == -EBUSY) {
 704                 return NETDEV_TX_BUSY;
 705         } /* else fall through */
 706
 707 tx_drop:
 708         card->stats.tx_dropped++;
 709         card->stats.tx_errors++;
 710         dev_kfree_skb_any(skb);
 711         netif_wake_queue(dev);
 712         return NETDEV_TX_OK;
 713 }
 714
 715 static int __qeth_l2_open(struct net_device *dev)
 716 {
 717         struct qeth_card *card = dev->ml_priv;
 718         int rc = 0;
 719
 720         QETH_CARD_TEXT(card, 4, "qethopen");
 721         if (card->state == CARD_STATE_UP)
 722                 return rc;
 723         if (card->state != CARD_STATE_SOFTSETUP)
 724                 return -ENODEV;
 725
 726         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
 727              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
 728                 QETH_CARD_TEXT(card, 4, "nomacadr");
 729                 return -EPERM;
 730         }
 731         card->data.state = CH_STATE_UP;
 732         card->state = CARD_STATE_UP;
 733         netif_start_queue(dev);
 734
 735         if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) {
 736                 napi_enable(&card->napi);
 737                 local_bh_disable();
 738                 napi_schedule(&card->napi);
 739                 /* kick-start the NAPI softirq: */
 740                 local_bh_enable();
 741         } else
 742                 rc = -EIO;
 743         return rc;
 744 }
 745
 746 static int qeth_l2_open(struct net_device *dev)
 747 {
 748         struct qeth_card *card = dev->ml_priv;
 749
 750         QETH_CARD_TEXT(card, 5, "qethope_");
 751         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 752                 QETH_CARD_TEXT(card, 3, "openREC");
 753                 return -ERESTARTSYS;
 754         }
 755         return __qeth_l2_open(dev);
 756 }
 757
 758 static int qeth_l2_stop(struct net_device *dev)
 759 {
 760         struct qeth_card *card = dev->ml_priv;
 761
 762         QETH_CARD_TEXT(card, 4, "qethstop");
 763         netif_tx_disable(dev);
 764         if (card->state == CARD_STATE_UP) {
 765                 card->state = CARD_STATE_SOFTSETUP;
 766                 napi_disable(&card->napi);
 767         }
 768         return 0;
 769 }
 770
 771 static const struct device_type qeth_l2_devtype = {
 772         .name = "qeth_layer2",
 773         .groups = qeth_l2_attr_groups,
 774 };
 775
 776 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 777 {
 778         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 779         int rc;
 780
 781         if (gdev->dev.type == &qeth_generic_devtype) {
 782                 rc = qeth_l2_create_device_attributes(&gdev->dev);
 783                 if (rc)
 784                         return rc;
 785         }
 786         INIT_LIST_HEAD(&card->vid_list);
 787         hash_init(card->mac_htable);
 788         card->info.hwtrap = 0;
 789         qeth_l2_vnicc_set_defaults(card);
 790         return 0;
 791 }
 792
 793 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
 794 {
 795         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
 796
 797         if (cgdev->dev.type == &qeth_generic_devtype)
 798                 qeth_l2_remove_device_attributes(&cgdev->dev);
 799         qeth_set_allowed_threads(card, 0, 1);
 800         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 801
 802         if (cgdev->state == CCWGROUP_ONLINE)
 803                 qeth_l2_set_offline(cgdev);
 804         if (qeth_netdev_is_registered(card->dev))
 805                 unregister_netdev(card->dev);
 806 }
 807
 808 static const struct ethtool_ops qeth_l2_ethtool_ops = {
 809         .get_link = ethtool_op_get_link,
 810         .get_strings = qeth_core_get_strings,
 811         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 812         .get_sset_count = qeth_core_get_sset_count,
 813         .get_drvinfo = qeth_core_get_drvinfo,
 814         .get_link_ksettings = qeth_core_ethtool_get_link_ksettings,
 815 };
 816
 817 static const struct ethtool_ops qeth_l2_osn_ops = {
 818         .get_strings = qeth_core_get_strings,
 819         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 820         .get_sset_count = qeth_core_get_sset_count,
 821         .get_drvinfo = qeth_core_get_drvinfo,
 822 };
 823
 824 static const struct net_device_ops qeth_l2_netdev_ops = {
 825         .ndo_open               = qeth_l2_open,
 826         .ndo_stop               = qeth_l2_stop,
 827         .ndo_get_stats          = qeth_get_stats,
 828         .ndo_start_xmit         = qeth_l2_hard_start_xmit,
 829         .ndo_features_check     = qeth_features_check,
 830         .ndo_validate_addr      = eth_validate_addr,
 831         .ndo_set_rx_mode        = qeth_l2_set_rx_mode,
 832         .ndo_do_ioctl           = qeth_do_ioctl,
 833         .ndo_set_mac_address    = qeth_l2_set_mac_address,
 834         .ndo_vlan_rx_add_vid    = qeth_l2_vlan_rx_add_vid,
 835         .ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,
 836         .ndo_tx_timeout         = qeth_tx_timeout,
 837         .ndo_fix_features       = qeth_fix_features,
 838         .ndo_set_features       = qeth_set_features
 839 };
 840
 841 static int qeth_l2_setup_netdev(struct qeth_card *card, bool carrier_ok)
 842 {
 843         int rc;
 844
 845         if (qeth_netdev_is_registered(card->dev))
 846                 return 0;
 847
 848         card->dev->priv_flags |= IFF_UNICAST_FLT;
 849         card->dev->netdev_ops = &qeth_l2_netdev_ops;
 850         if (card->info.type == QETH_CARD_TYPE_OSN) {
 851                 card->dev->ethtool_ops = &qeth_l2_osn_ops;
 852                 card->dev->flags |= IFF_NOARP;
 853         } else {
 854                 card->dev->ethtool_ops = &qeth_l2_ethtool_ops;
 855                 card->dev->needed_headroom = sizeof(struct qeth_hdr);
 856         }
 857
 858         if (card->info.type == QETH_CARD_TYPE_OSM)
 859                 card->dev->features |= NETIF_F_VLAN_CHALLENGED;
 860         else
 861                 card->dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
 862
 863         if (card->info.type == QETH_CARD_TYPE_OSD && !card->info.guestlan) {
 864                 card->dev->features |= NETIF_F_SG;
 865                 /* OSA 3S and earlier has no RX/TX support */
 866                 if (qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM)) {
 867                         card->dev->hw_features |= NETIF_F_IP_CSUM;
 868                         card->dev->vlan_features |= NETIF_F_IP_CSUM;
 869                 }
 870         }
 871         if (qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) {
 872                 card->dev->hw_features |= NETIF_F_IPV6_CSUM;
 873                 card->dev->vlan_features |= NETIF_F_IPV6_CSUM;
 874         }
 875         if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM) ||
 876             qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6)) {
 877                 card->dev->hw_features |= NETIF_F_RXCSUM;
 878                 card->dev->vlan_features |= NETIF_F_RXCSUM;
 879         }
 880         if (qeth_is_supported(card, IPA_OUTBOUND_TSO)) {
 881                 card->dev->hw_features |= NETIF_F_TSO;
 882                 card->dev->vlan_features |= NETIF_F_TSO;
 883         }
 884         if (qeth_is_supported6(card, IPA_OUTBOUND_TSO)) {
 885                 card->dev->hw_features |= NETIF_F_TSO6;
 886                 card->dev->vlan_features |= NETIF_F_TSO6;
 887         }
 888
 889         if (card->dev->hw_features & (NETIF_F_TSO | NETIF_F_TSO6)) {
 890                 card->dev->needed_headroom = sizeof(struct qeth_hdr_tso);
 891                 netif_set_gso_max_size(card->dev,
 892                                        PAGE_SIZE * (QDIO_MAX_ELEMENTS_PER_BUFFER - 1));
 893         }
 894
 895         if (!is_valid_ether_addr(card->dev->dev_addr))
 896                 qeth_l2_request_initial_mac(card);
 897         netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT);
 898         rc = register_netdev(card->dev);
 899         if (!rc && carrier_ok)
 900                 netif_carrier_on(card->dev);
 901
 902         if (rc)
 903                 card->dev->netdev_ops = NULL;
 904         return rc;
 905 }
 906
 907 static int qeth_l2_start_ipassists(struct qeth_card *card)
 908 {
 909         /* configure isolation level */
 910         if (qeth_set_access_ctrl_online(card, 0))
 911                 return -ENODEV;
 912         return 0;
 913 }
 914
 915 static void qeth_l2_trace_features(struct qeth_card *card)
 916 {
 917         /* Set BridgePort features */
 918         QETH_CARD_TEXT(card, 2, "featuSBP");
 919         QETH_CARD_HEX(card, 2, &card->options.sbp.supported_funcs,
 920                       sizeof(card->options.sbp.supported_funcs));
 921         /* VNIC Characteristics features */
 922         QETH_CARD_TEXT(card, 2, "feaVNICC");
 923         QETH_CARD_HEX(card, 2, &card->options.vnicc.sup_chars,
 924                       sizeof(card->options.vnicc.sup_chars));
 925 }
 926
 927 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 928 {
 929         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 930         int rc = 0;
 931         enum qeth_card_states recover_flag;
 932         bool carrier_ok;
 933
 934         mutex_lock(&card->discipline_mutex);
 935         mutex_lock(&card->conf_mutex);
 936         QETH_DBF_TEXT(SETUP, 2, "setonlin");
 937         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 938
 939         recover_flag = card->state;
 940         rc = qeth_core_hardsetup_card(card, &carrier_ok);
 941         if (rc) {
 942                 QETH_DBF_TEXT_(SETUP, 2, "2err%04x", rc);
 943                 rc = -ENODEV;
 944                 goto out_remove;
 945         }
 946         qeth_bridgeport_query_support(card);
 947         if (card->options.sbp.supported_funcs)
 948                 dev_info(&card->gdev->dev,
 949                 "The device represents a Bridge Capable Port\n");
 950
 951         rc = qeth_l2_setup_netdev(card, carrier_ok);
 952         if (rc)
 953                 goto out_remove;
 954
 955         if (card->info.type != QETH_CARD_TYPE_OSN &&
 956             !qeth_l2_send_setmac(card, card->dev->dev_addr))
 957                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 958
 959         if (qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP)) {
 960                 if (card->info.hwtrap &&
 961                     qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM))
 962                         card->info.hwtrap = 0;
 963         } else
 964                 card->info.hwtrap = 0;
 965
 966         /* for the rx_bcast characteristic, init VNICC after setmac */
 967         qeth_l2_vnicc_init(card);
 968
 969         qeth_trace_features(card);
 970         qeth_l2_trace_features(card);
 971
 972         qeth_l2_setup_bridgeport_attrs(card);
 973
 974         card->state = CARD_STATE_HARDSETUP;
 975         qeth_print_status_message(card);
 976
 977         /* softsetup */
 978         QETH_DBF_TEXT(SETUP, 2, "softsetp");
 979
 980         if ((card->info.type == QETH_CARD_TYPE_OSD) ||
 981             (card->info.type == QETH_CARD_TYPE_OSX)) {
 982                 rc = qeth_l2_start_ipassists(card);
 983                 if (rc)
 984                         goto out_remove;
 985         }
 986
 987         if (card->info.type != QETH_CARD_TYPE_OSN)
 988                 qeth_l2_process_vlans(card);
 989
 990         netif_tx_disable(card->dev);
 991
 992         rc = qeth_init_qdio_queues(card);
 993         if (rc) {
 994                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
 995                 rc = -ENODEV;
 996                 goto out_remove;
 997         }
 998         card->state = CARD_STATE_SOFTSETUP;
 999
1000         qeth_set_allowed_threads(card, 0xffffffff, 0);
1001
1002         qeth_enable_hw_features(card->dev);
1003         if (recover_flag == CARD_STATE_RECOVER) {
1004                 if (recovery_mode &&
1005                     card->info.type != QETH_CARD_TYPE_OSN) {
1006                         __qeth_l2_open(card->dev);
1007                         qeth_l2_set_rx_mode(card->dev);
1008                 } else {
1009                         rtnl_lock();
1010                         dev_open(card->dev, NULL);
1011                         rtnl_unlock();
1012                 }
1013         }
1014         /* let user_space know that device is online */
1015         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1016         mutex_unlock(&card->conf_mutex);
1017         mutex_unlock(&card->discipline_mutex);
1018         return 0;
1019
1020 out_remove:
1021         qeth_l2_stop_card(card, 0);
1022         ccw_device_set_offline(CARD_DDEV(card));
1023         ccw_device_set_offline(CARD_WDEV(card));
1024         ccw_device_set_offline(CARD_RDEV(card));
1025         qdio_free(CARD_DDEV(card));
1026         if (recover_flag == CARD_STATE_RECOVER)
1027                 card->state = CARD_STATE_RECOVER;
1028         else
1029                 card->state = CARD_STATE_DOWN;
1030         mutex_unlock(&card->conf_mutex);
1031         mutex_unlock(&card->discipline_mutex);
1032         return rc;
1033 }
1034
1035 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1036 {
1037         return __qeth_l2_set_online(gdev, 0);
1038 }
1039
1040 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1041                                         int recovery_mode)
1042 {
1043         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1044         int rc = 0, rc2 = 0, rc3 = 0;
1045         enum qeth_card_states recover_flag;
1046
1047         mutex_lock(&card->discipline_mutex);
1048         mutex_lock(&card->conf_mutex);
1049         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1050         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1051
1052         netif_carrier_off(card->dev);
1053         recover_flag = card->state;
1054         if ((!recovery_mode && card->info.hwtrap) || card->info.hwtrap == 2) {
1055                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1056                 card->info.hwtrap = 1;
1057         }
1058         qeth_l2_stop_card(card, recovery_mode);
1059         rc  = ccw_device_set_offline(CARD_DDEV(card));
1060         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1061         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1062         if (!rc)
1063                 rc = (rc2) ? rc2 : rc3;
1064         if (rc)
1065                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1066         qdio_free(CARD_DDEV(card));
1067         if (recover_flag == CARD_STATE_UP)
1068                 card->state = CARD_STATE_RECOVER;
1069         /* let user_space know that device is offline */
1070         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1071         mutex_unlock(&card->conf_mutex);
1072         mutex_unlock(&card->discipline_mutex);
1073         return 0;
1074 }
1075
1076 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1077 {
1078         return __qeth_l2_set_offline(cgdev, 0);
1079 }
1080
1081 static int qeth_l2_recover(void *ptr)
1082 {
1083         struct qeth_card *card;
1084         int rc = 0;
1085
1086         card = (struct qeth_card *) ptr;
1087         QETH_CARD_TEXT(card, 2, "recover1");
1088         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1089                 return 0;
1090         QETH_CARD_TEXT(card, 2, "recover2");
1091         dev_warn(&card->gdev->dev,
1092                 "A recovery process has been started for the device\n");
1093         qeth_set_recovery_task(card);
1094         __qeth_l2_set_offline(card->gdev, 1);
1095         rc = __qeth_l2_set_online(card->gdev, 1);
1096         if (!rc)
1097                 dev_info(&card->gdev->dev,
1098                         "Device successfully recovered!\n");
1099         else {
1100                 qeth_close_dev(card);
1101                 dev_warn(&card->gdev->dev, "The qeth device driver "
1102                                 "failed to recover an error on the device\n");
1103         }
1104         qeth_clear_recovery_task(card);
1105         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1106         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1107         return 0;
1108 }
1109
1110 static int __init qeth_l2_init(void)
1111 {
1112         pr_info("register layer 2 discipline\n");
1113         return 0;
1114 }
1115
1116 static void __exit qeth_l2_exit(void)
1117 {
1118         pr_info("unregister layer 2 discipline\n");
1119 }
1120
1121 static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev)
1122 {
1123         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1124
1125         netif_device_detach(card->dev);
1126         qeth_set_allowed_threads(card, 0, 1);
1127         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1128         if (gdev->state == CCWGROUP_OFFLINE)
1129                 return 0;
1130         if (card->state == CARD_STATE_UP) {
1131                 if (card->info.hwtrap)
1132                         qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1133                 __qeth_l2_set_offline(card->gdev, 1);
1134         } else
1135                 __qeth_l2_set_offline(card->gdev, 0);
1136         return 0;
1137 }
1138
1139 static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
1140 {
1141         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1142         int rc = 0;
1143
1144         if (card->state == CARD_STATE_RECOVER) {
1145                 rc = __qeth_l2_set_online(card->gdev, 1);
1146                 if (rc) {
1147                         rtnl_lock();
1148                         dev_close(card->dev);
1149                         rtnl_unlock();
1150                 }
1151         } else
1152                 rc = __qeth_l2_set_online(card->gdev, 0);
1153
1154         qeth_set_allowed_threads(card, 0xffffffff, 0);
1155         netif_device_attach(card->dev);
1156         if (rc)
1157                 dev_warn(&card->gdev->dev, "The qeth device driver "
1158                         "failed to recover an error on the device\n");
1159         return rc;
1160 }
1161
1162 /* Returns zero if the command is successfully "consumed" */
1163 static int qeth_l2_control_event(struct qeth_card *card,
1164                                         struct qeth_ipa_cmd *cmd)
1165 {
1166         switch (cmd->hdr.command) {
1167         case IPA_CMD_SETBRIDGEPORT_OSA:
1168         case IPA_CMD_SETBRIDGEPORT_IQD:
1169                 if (cmd->data.sbp.hdr.command_code ==
1170                                 IPA_SBP_BRIDGE_PORT_STATE_CHANGE) {
1171                         qeth_bridge_state_change(card, cmd);
1172                         return 0;
1173                 } else
1174                         return 1;
1175         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
1176                 qeth_bridge_host_event(card, cmd);
1177                 return 0;
1178         default:
1179                 return 1;
1180         }
1181 }
1182
1183 struct qeth_discipline qeth_l2_discipline = {
1184         .devtype = &qeth_l2_devtype,
1185         .process_rx_buffer = qeth_l2_process_inbound_buffer,
1186         .recover = qeth_l2_recover,
1187         .setup = qeth_l2_probe_device,
1188         .remove = qeth_l2_remove_device,
1189         .set_online = qeth_l2_set_online,
1190         .set_offline = qeth_l2_set_offline,
1191         .freeze = qeth_l2_pm_suspend,
1192         .thaw = qeth_l2_pm_resume,
1193         .restore = qeth_l2_pm_resume,
1194         .do_ioctl = NULL,
1195         .control_event_handler = qeth_l2_control_event,
1196 };
1197 EXPORT_SYMBOL_GPL(qeth_l2_discipline);
1198
1199 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1200                            struct qeth_cmd_buffer *iob)
1201 {
1202         struct qeth_channel *channel = iob->channel;
1203         int rc = 0;
1204
1205         QETH_CARD_TEXT(card, 5, "osndctrd");
1206
1207         wait_event(card->wait_q,
1208                    atomic_cmpxchg(&channel->irq_pending, 0, 1) == 0);
1209         qeth_prepare_control_data(card, len, iob);
1210         QETH_CARD_TEXT(card, 6, "osnoirqp");
1211         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1212         rc = ccw_device_start_timeout(channel->ccwdev, channel->ccw,
1213                                       (addr_t) iob, 0, 0, QETH_IPA_TIMEOUT);
1214         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1215         if (rc) {
1216                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1217                            "ccw_device_start rc = %i\n", rc);
1218                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1219                 qeth_release_buffer(channel, iob);
1220                 atomic_set(&channel->irq_pending, 0);
1221                 wake_up(&card->wait_q);
1222         }
1223         return rc;
1224 }
1225
1226 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1227                         struct qeth_cmd_buffer *iob, int data_len)
1228 {
1229         u16 s1, s2;
1230
1231         QETH_CARD_TEXT(card, 4, "osndipa");
1232
1233         qeth_prepare_ipa_cmd(card, iob);
1234         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1235         s2 = (u16)data_len;
1236         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1237         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1238         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1239         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1240         return qeth_osn_send_control_data(card, s1, iob);
1241 }
1242
1243 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1244 {
1245         struct qeth_cmd_buffer *iob;
1246         struct qeth_card *card;
1247
1248         if (!dev)
1249                 return -ENODEV;
1250         card = dev->ml_priv;
1251         if (!card)
1252                 return -ENODEV;
1253         QETH_CARD_TEXT(card, 2, "osnsdmc");
1254         if (!qeth_card_hw_is_reachable(card))
1255                 return -ENODEV;
1256         iob = qeth_wait_for_buffer(&card->write);
1257         memcpy(__ipa_cmd(iob), data, data_len);
1258         return qeth_osn_send_ipa_cmd(card, iob, data_len);
1259 }
1260 EXPORT_SYMBOL(qeth_osn_assist);
1261
1262 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1263                   int (*assist_cb)(struct net_device *, void *),
1264                   int (*data_cb)(struct sk_buff *))
1265 {
1266         struct qeth_card *card;
1267         char bus_id[16];
1268         u16 devno;
1269
1270         memcpy(&devno, read_dev_no, 2);
1271         sprintf(bus_id, "0.0.%04x", devno);
1272         card = qeth_get_card_by_busid(bus_id);
1273         if (!card || !IS_OSN(card))
1274                 return -ENODEV;
1275         *dev = card->dev;
1276
1277         QETH_CARD_TEXT(card, 2, "osnreg");
1278         if ((assist_cb == NULL) || (data_cb == NULL))
1279                 return -EINVAL;
1280         card->osn_info.assist_cb = assist_cb;
1281         card->osn_info.data_cb = data_cb;
1282         return 0;
1283 }
1284 EXPORT_SYMBOL(qeth_osn_register);
1285
1286 void qeth_osn_deregister(struct net_device *dev)
1287 {
1288         struct qeth_card *card;
1289
1290         if (!dev)
1291                 return;
1292         card = dev->ml_priv;
1293         if (!card)
1294                 return;
1295         QETH_CARD_TEXT(card, 2, "osndereg");
1296         card->osn_info.assist_cb = NULL;
1297         card->osn_info.data_cb = NULL;
1298         return;
1299 }
1300 EXPORT_SYMBOL(qeth_osn_deregister);
1301
1302 /* SETBRIDGEPORT support, async notifications */
1303
1304 enum qeth_an_event_type {anev_reg_unreg, anev_abort, anev_reset};
1305
1306 /**
1307  * qeth_bridge_emit_host_event() - bridgeport address change notification
1308  * @card:  qeth_card structure pointer, for udev events.
1309  * @evtype:  "normal" register/unregister, or abort, or reset. For abort
1310  *            and reset token and addr_lnid are unused and may be NULL.
1311  * @code:  event bitmask: high order bit 0x80 value 1 means removal of an
1312  *                        object, 0 - addition of an object.
1313  *                        0x01 - VLAN, 0x02 - MAC, 0x03 - VLAN and MAC.
1314  * @token: "network token" structure identifying physical address of the port.
1315  * @addr_lnid: pointer to structure with MAC address and VLAN ID.
1316  *
1317  * This function is called when registrations and deregistrations are
1318  * reported by the hardware, and also when notifications are enabled -
1319  * for all currently registered addresses.
1320  */
1321 static void qeth_bridge_emit_host_event(struct qeth_card *card,
1322         enum qeth_an_event_type evtype,
1323         u8 code, struct net_if_token *token, struct mac_addr_lnid *addr_lnid)
1324 {
1325         char str[7][32];
1326         char *env[8];
1327         int i = 0;
1328
1329         switch (evtype) {
1330         case anev_reg_unreg:
1331                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=%s",
1332                                 (code & IPA_ADDR_CHANGE_CODE_REMOVAL)
1333                                 ? "deregister" : "register");
1334                 env[i] = str[i]; i++;
1335                 if (code & IPA_ADDR_CHANGE_CODE_VLANID) {
1336                         snprintf(str[i], sizeof(str[i]), "VLAN=%d",
1337                                 addr_lnid->lnid);
1338                         env[i] = str[i]; i++;
1339                 }
1340                 if (code & IPA_ADDR_CHANGE_CODE_MACADDR) {
1341                         snprintf(str[i], sizeof(str[i]), "MAC=%pM",
1342                                 addr_lnid->mac);
1343                         env[i] = str[i]; i++;
1344                 }
1345                 snprintf(str[i], sizeof(str[i]), "NTOK_BUSID=%x.%x.%04x",
1346                         token->cssid, token->ssid, token->devnum);
1347                 env[i] = str[i]; i++;
1348                 snprintf(str[i], sizeof(str[i]), "NTOK_IID=%02x", token->iid);
1349                 env[i] = str[i]; i++;
1350                 snprintf(str[i], sizeof(str[i]), "NTOK_CHPID=%02x",
1351                                 token->chpid);
1352                 env[i] = str[i]; i++;
1353                 snprintf(str[i], sizeof(str[i]), "NTOK_CHID=%04x", token->chid);
1354                 env[i] = str[i]; i++;
1355                 break;
1356         case anev_abort:
1357                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=abort");
1358                 env[i] = str[i]; i++;
1359                 break;
1360         case anev_reset:
1361                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=reset");
1362                 env[i] = str[i]; i++;
1363                 break;
1364         }
1365         env[i] = NULL;
1366         kobject_uevent_env(&card->gdev->dev.kobj, KOBJ_CHANGE, env);
1367 }
1368
1369 struct qeth_bridge_state_data {
1370         struct work_struct worker;
1371         struct qeth_card *card;
1372         struct qeth_sbp_state_change qports;
1373 };
1374
1375 static void qeth_bridge_state_change_worker(struct work_struct *work)
1376 {
1377         struct qeth_bridge_state_data *data =
1378                 container_of(work, struct qeth_bridge_state_data, worker);
1379         /* We are only interested in the first entry - local port */
1380         struct qeth_sbp_port_entry *entry = &data->qports.entry[0];
1381         char env_locrem[32];
1382         char env_role[32];
1383         char env_state[32];
1384         char *env[] = {
1385                 env_locrem,
1386                 env_role,
1387                 env_state,
1388                 NULL
1389         };
1390
1391         /* Role should not change by itself, but if it did, */
1392         /* information from the hardware is authoritative.  */
1393         mutex_lock(&data->card->conf_mutex);
1394         data->card->options.sbp.role = entry->role;
1395         mutex_unlock(&data->card->conf_mutex);
1396
1397         snprintf(env_locrem, sizeof(env_locrem), "BRIDGEPORT=statechange");
1398         snprintf(env_role, sizeof(env_role), "ROLE=%s",
1399                 (entry->role == QETH_SBP_ROLE_NONE) ? "none" :
1400                 (entry->role == QETH_SBP_ROLE_PRIMARY) ? "primary" :
1401                 (entry->role == QETH_SBP_ROLE_SECONDARY) ? "secondary" :
1402                 "<INVALID>");
1403         snprintf(env_state, sizeof(env_state), "STATE=%s",
1404                 (entry->state == QETH_SBP_STATE_INACTIVE) ? "inactive" :
1405                 (entry->state == QETH_SBP_STATE_STANDBY) ? "standby" :
1406                 (entry->state == QETH_SBP_STATE_ACTIVE) ? "active" :
1407                 "<INVALID>");
1408         kobject_uevent_env(&data->card->gdev->dev.kobj,
1409                                 KOBJ_CHANGE, env);
1410         kfree(data);
1411 }
1412
1413 static void qeth_bridge_state_change(struct qeth_card *card,
1414                                         struct qeth_ipa_cmd *cmd)
1415 {
1416         struct qeth_sbp_state_change *qports =
1417                  &cmd->data.sbp.data.state_change;
1418         struct qeth_bridge_state_data *data;
1419         int extrasize;
1420
1421         QETH_CARD_TEXT(card, 2, "brstchng");
1422         if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1423                 QETH_CARD_TEXT_(card, 2, "BPsz%04x", qports->entry_length);
1424                 return;
1425         }
1426         extrasize = sizeof(struct qeth_sbp_port_entry) * qports->num_entries;
1427         data = kzalloc(sizeof(struct qeth_bridge_state_data) + extrasize,
1428                 GFP_ATOMIC);
1429         if (!data) {
1430                 QETH_CARD_TEXT(card, 2, "BPSalloc");
1431                 return;
1432         }
1433         INIT_WORK(&data->worker, qeth_bridge_state_change_worker);
1434         data->card = card;
1435         memcpy(&data->qports, qports,
1436                         sizeof(struct qeth_sbp_state_change) + extrasize);
1437         queue_work(qeth_wq, &data->worker);
1438 }
1439
1440 struct qeth_bridge_host_data {
1441         struct work_struct worker;
1442         struct qeth_card *card;
1443         struct qeth_ipacmd_addr_change hostevs;
1444 };
1445
1446 static void qeth_bridge_host_event_worker(struct work_struct *work)
1447 {
1448         struct qeth_bridge_host_data *data =
1449                 container_of(work, struct qeth_bridge_host_data, worker);
1450         int i;
1451
1452         if (data->hostevs.lost_event_mask) {
1453                 dev_info(&data->card->gdev->dev,
1454 "Address notification from the Bridge Port stopped %s (%s)\n",
1455                         data->card->dev->name,
1456                         (data->hostevs.lost_event_mask == 0x01)
1457                         ? "Overflow"
1458                         : (data->hostevs.lost_event_mask == 0x02)
1459                         ? "Bridge port state change"
1460                         : "Unknown reason");
1461                 mutex_lock(&data->card->conf_mutex);
1462                 data->card->options.sbp.hostnotification = 0;
1463                 mutex_unlock(&data->card->conf_mutex);
1464                 qeth_bridge_emit_host_event(data->card, anev_abort,
1465                         0, NULL, NULL);
1466         } else
1467                 for (i = 0; i < data->hostevs.num_entries; i++) {
1468                         struct qeth_ipacmd_addr_change_entry *entry =
1469                                         &data->hostevs.entry[i];
1470                         qeth_bridge_emit_host_event(data->card,
1471                                         anev_reg_unreg,
1472                                         entry->change_code,
1473                                         &entry->token, &entry->addr_lnid);
1474                 }
1475         kfree(data);
1476 }
1477
1478 static void qeth_bridge_host_event(struct qeth_card *card,
1479                                         struct qeth_ipa_cmd *cmd)
1480 {
1481         struct qeth_ipacmd_addr_change *hostevs =
1482                  &cmd->data.addrchange;
1483         struct qeth_bridge_host_data *data;
1484         int extrasize;
1485
1486         QETH_CARD_TEXT(card, 2, "brhostev");
1487         if (cmd->hdr.return_code != 0x0000) {
1488                 if (cmd->hdr.return_code == 0x0010) {
1489                         if (hostevs->lost_event_mask == 0x00)
1490                                 hostevs->lost_event_mask = 0xff;
1491                 } else {
1492                         QETH_CARD_TEXT_(card, 2, "BPHe%04x",
1493                                 cmd->hdr.return_code);
1494                         return;
1495                 }
1496         }
1497         extrasize = sizeof(struct qeth_ipacmd_addr_change_entry) *
1498                                                 hostevs->num_entries;
1499         data = kzalloc(sizeof(struct qeth_bridge_host_data) + extrasize,
1500                 GFP_ATOMIC);
1501         if (!data) {
1502                 QETH_CARD_TEXT(card, 2, "BPHalloc");
1503                 return;
1504         }
1505         INIT_WORK(&data->worker, qeth_bridge_host_event_worker);
1506         data->card = card;
1507         memcpy(&data->hostevs, hostevs,
1508                         sizeof(struct qeth_ipacmd_addr_change) + extrasize);
1509         queue_work(qeth_wq, &data->worker);
1510 }
1511
1512 /* SETBRIDGEPORT support; sending commands */
1513
1514 struct _qeth_sbp_cbctl {
1515         u16 ipa_rc;
1516         u16 cmd_rc;
1517         union {
1518                 u32 supported;
1519                 struct {
1520                         enum qeth_sbp_roles *role;
1521                         enum qeth_sbp_states *state;
1522                 } qports;
1523         } data;
1524 };
1525
1526 /**
1527  * qeth_bridgeport_makerc() - derive "traditional" error from hardware codes.
1528  * @card:                     qeth_card structure pointer, for debug messages.
1529  * @cbctl:                    state structure with hardware return codes.
1530  * @setcmd:                   IPA command code
1531  *
1532  * Returns negative errno-compatible error indication or 0 on success.
1533  */
1534 static int qeth_bridgeport_makerc(struct qeth_card *card,
1535         struct _qeth_sbp_cbctl *cbctl, enum qeth_ipa_sbp_cmd setcmd)
1536 {
1537         int rc;
1538         int is_iqd = (card->info.type == QETH_CARD_TYPE_IQD);
1539
1540         if ((is_iqd && (cbctl->ipa_rc == IPA_RC_SUCCESS)) ||
1541             (!is_iqd && (cbctl->ipa_rc == cbctl->cmd_rc)))
1542                 switch (cbctl->cmd_rc) {
1543                 case IPA_RC_SUCCESS:
1544                         rc = 0;
1545                         break;
1546                 case IPA_RC_L2_UNSUPPORTED_CMD:
1547                 case IPA_RC_UNSUPPORTED_COMMAND:
1548                         rc = -EOPNOTSUPP;
1549                         break;
1550                 case IPA_RC_SBP_OSA_NOT_CONFIGURED:
1551                 case IPA_RC_SBP_IQD_NOT_CONFIGURED:
1552                         rc = -ENODEV; /* maybe not the best code here? */
1553                         dev_err(&card->gdev->dev,
1554         "The device is not configured as a Bridge Port\n");
1555                         break;
1556                 case IPA_RC_SBP_OSA_OS_MISMATCH:
1557                 case IPA_RC_SBP_IQD_OS_MISMATCH:
1558                         rc = -EPERM;
1559                         dev_err(&card->gdev->dev,
1560         "A Bridge Port is already configured by a different operating system\n");
1561                         break;
1562                 case IPA_RC_SBP_OSA_ANO_DEV_PRIMARY:
1563                 case IPA_RC_SBP_IQD_ANO_DEV_PRIMARY:
1564                         switch (setcmd) {
1565                         case IPA_SBP_SET_PRIMARY_BRIDGE_PORT:
1566                                 rc = -EEXIST;
1567                                 dev_err(&card->gdev->dev,
1568         "The LAN already has a primary Bridge Port\n");
1569                                 break;
1570                         case IPA_SBP_SET_SECONDARY_BRIDGE_PORT:
1571                                 rc = -EBUSY;
1572                                 dev_err(&card->gdev->dev,
1573         "The device is already a primary Bridge Port\n");
1574                                 break;
1575                         default:
1576                                 rc = -EIO;
1577                         }
1578                         break;
1579                 case IPA_RC_SBP_OSA_CURRENT_SECOND:
1580                 case IPA_RC_SBP_IQD_CURRENT_SECOND:
1581                         rc = -EBUSY;
1582                         dev_err(&card->gdev->dev,
1583         "The device is already a secondary Bridge Port\n");
1584                         break;
1585                 case IPA_RC_SBP_OSA_LIMIT_SECOND:
1586                 case IPA_RC_SBP_IQD_LIMIT_SECOND:
1587                         rc = -EEXIST;
1588                         dev_err(&card->gdev->dev,
1589         "The LAN cannot have more secondary Bridge Ports\n");
1590                         break;
1591                 case IPA_RC_SBP_OSA_CURRENT_PRIMARY:
1592                 case IPA_RC_SBP_IQD_CURRENT_PRIMARY:
1593                         rc = -EBUSY;
1594                         dev_err(&card->gdev->dev,
1595         "The device is already a primary Bridge Port\n");
1596                         break;
1597                 case IPA_RC_SBP_OSA_NOT_AUTHD_BY_ZMAN:
1598                 case IPA_RC_SBP_IQD_NOT_AUTHD_BY_ZMAN:
1599                         rc = -EACCES;
1600                         dev_err(&card->gdev->dev,
1601         "The device is not authorized to be a Bridge Port\n");
1602                         break;
1603                 default:
1604                         rc = -EIO;
1605                 }
1606         else
1607                 switch (cbctl->ipa_rc) {
1608                 case IPA_RC_NOTSUPP:
1609                         rc = -EOPNOTSUPP;
1610                         break;
1611                 case IPA_RC_UNSUPPORTED_COMMAND:
1612                         rc = -EOPNOTSUPP;
1613                         break;
1614                 default:
1615                         rc = -EIO;
1616                 }
1617
1618         if (rc) {
1619                 QETH_CARD_TEXT_(card, 2, "SBPi%04x", cbctl->ipa_rc);
1620                 QETH_CARD_TEXT_(card, 2, "SBPc%04x", cbctl->cmd_rc);
1621         }
1622         return rc;
1623 }
1624
1625 static struct qeth_cmd_buffer *qeth_sbp_build_cmd(struct qeth_card *card,
1626                                                   enum qeth_ipa_sbp_cmd sbp_cmd,
1627                                                   unsigned int cmd_length)
1628 {
1629         enum qeth_ipa_cmds ipa_cmd = (card->info.type == QETH_CARD_TYPE_IQD) ?
1630                                         IPA_CMD_SETBRIDGEPORT_IQD :
1631                                         IPA_CMD_SETBRIDGEPORT_OSA;
1632         struct qeth_cmd_buffer *iob;
1633         struct qeth_ipa_cmd *cmd;
1634
1635         iob = qeth_get_ipacmd_buffer(card, ipa_cmd, 0);
1636         if (!iob)
1637                 return iob;
1638         cmd = __ipa_cmd(iob);
1639         cmd->data.sbp.hdr.cmdlength = sizeof(struct qeth_ipacmd_sbp_hdr) +
1640                                       cmd_length;
1641         cmd->data.sbp.hdr.command_code = sbp_cmd;
1642         cmd->data.sbp.hdr.used_total = 1;
1643         cmd->data.sbp.hdr.seq_no = 1;
1644         return iob;
1645 }
1646
1647 static int qeth_bridgeport_query_support_cb(struct qeth_card *card,
1648         struct qeth_reply *reply, unsigned long data)
1649 {
1650         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1651         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1652         QETH_CARD_TEXT(card, 2, "brqsupcb");
1653         cbctl->ipa_rc = cmd->hdr.return_code;
1654         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1655         if ((cbctl->ipa_rc == 0) && (cbctl->cmd_rc == 0)) {
1656                 cbctl->data.supported =
1657                         cmd->data.sbp.data.query_cmds_supp.supported_cmds;
1658         } else {
1659                 cbctl->data.supported = 0;
1660         }
1661         return 0;
1662 }
1663
1664 /**
1665  * qeth_bridgeport_query_support() - store bitmask of supported subfunctions.
1666  * @card:                            qeth_card structure pointer.
1667  *
1668  * Sets bitmask of supported setbridgeport subfunctions in the qeth_card
1669  * strucutre: card->options.sbp.supported_funcs.
1670  */
1671 static void qeth_bridgeport_query_support(struct qeth_card *card)
1672 {
1673         struct qeth_cmd_buffer *iob;
1674         struct _qeth_sbp_cbctl cbctl;
1675
1676         QETH_CARD_TEXT(card, 2, "brqsuppo");
1677         iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_COMMANDS_SUPPORTED,
1678                                  sizeof(struct qeth_sbp_query_cmds_supp));
1679         if (!iob)
1680                 return;
1681         if (qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_support_cb,
1682                                                         (void *)&cbctl) ||
1683             qeth_bridgeport_makerc(card, &cbctl,
1684                                         IPA_SBP_QUERY_COMMANDS_SUPPORTED)) {
1685                 /* non-zero makerc signifies failure, and produce messages */
1686                 card->options.sbp.role = QETH_SBP_ROLE_NONE;
1687                 return;
1688         }
1689         card->options.sbp.supported_funcs = cbctl.data.supported;
1690 }
1691
1692 static int qeth_bridgeport_query_ports_cb(struct qeth_card *card,
1693         struct qeth_reply *reply, unsigned long data)
1694 {
1695         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1696         struct qeth_sbp_query_ports *qports = &cmd->data.sbp.data.query_ports;
1697         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1698
1699         QETH_CARD_TEXT(card, 2, "brqprtcb");
1700         cbctl->ipa_rc = cmd->hdr.return_code;
1701         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1702         if ((cbctl->ipa_rc != 0) || (cbctl->cmd_rc != 0))
1703                 return 0;
1704         if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1705                 cbctl->cmd_rc = 0xffff;
1706                 QETH_CARD_TEXT_(card, 2, "SBPs%04x", qports->entry_length);
1707                 return 0;
1708         }
1709         /* first entry contains the state of the local port */
1710         if (qports->num_entries > 0) {
1711                 if (cbctl->data.qports.role)
1712                         *cbctl->data.qports.role = qports->entry[0].role;
1713                 if (cbctl->data.qports.state)
1714                         *cbctl->data.qports.state = qports->entry[0].state;
1715         }
1716         return 0;
1717 }
1718
1719 /**
1720  * qeth_bridgeport_query_ports() - query local bridgeport status.
1721  * @card:                          qeth_card structure pointer.
1722  * @role:   Role of the port: 0-none, 1-primary, 2-secondary.
1723  * @state:  State of the port: 0-inactive, 1-standby, 2-active.
1724  *
1725  * Returns negative errno-compatible error indication or 0 on success.
1726  *
1727  * 'role' and 'state' are not updated in case of hardware operation failure.
1728  */
1729 int qeth_bridgeport_query_ports(struct qeth_card *card,
1730         enum qeth_sbp_roles *role, enum qeth_sbp_states *state)
1731 {
1732         int rc = 0;
1733         struct qeth_cmd_buffer *iob;
1734         struct _qeth_sbp_cbctl cbctl = {
1735                 .data = {
1736                         .qports = {
1737                                 .role = role,
1738                                 .state = state,
1739                         },
1740                 },
1741         };
1742
1743         QETH_CARD_TEXT(card, 2, "brqports");
1744         if (!(card->options.sbp.supported_funcs & IPA_SBP_QUERY_BRIDGE_PORTS))
1745                 return -EOPNOTSUPP;
1746         iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_BRIDGE_PORTS, 0);
1747         if (!iob)
1748                 return -ENOMEM;
1749         rc = qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_ports_cb,
1750                                 (void *)&cbctl);
1751         if (rc < 0)
1752                 return rc;
1753         return qeth_bridgeport_makerc(card, &cbctl, IPA_SBP_QUERY_BRIDGE_PORTS);
1754 }
1755
1756 static int qeth_bridgeport_set_cb(struct qeth_card *card,
1757         struct qeth_reply *reply, unsigned long data)
1758 {
1759         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
1760         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1761         QETH_CARD_TEXT(card, 2, "brsetrcb");
1762         cbctl->ipa_rc = cmd->hdr.return_code;
1763         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1764         return 0;
1765 }
1766
1767 /**
1768  * qeth_bridgeport_setrole() - Assign primary role to the port.
1769  * @card:                      qeth_card structure pointer.
1770  * @role:                      Role to assign.
1771  *
1772  * Returns negative errno-compatible error indication or 0 on success.
1773  */
1774 int qeth_bridgeport_setrole(struct qeth_card *card, enum qeth_sbp_roles role)
1775 {
1776         int rc = 0;
1777         int cmdlength;
1778         struct qeth_cmd_buffer *iob;
1779         struct _qeth_sbp_cbctl cbctl;
1780         enum qeth_ipa_sbp_cmd setcmd;
1781
1782         QETH_CARD_TEXT(card, 2, "brsetrol");
1783         switch (role) {
1784         case QETH_SBP_ROLE_NONE:
1785                 setcmd = IPA_SBP_RESET_BRIDGE_PORT_ROLE;
1786                 cmdlength = sizeof(struct qeth_sbp_reset_role);
1787                 break;
1788         case QETH_SBP_ROLE_PRIMARY:
1789                 setcmd = IPA_SBP_SET_PRIMARY_BRIDGE_PORT;
1790                 cmdlength = sizeof(struct qeth_sbp_set_primary);
1791                 break;
1792         case QETH_SBP_ROLE_SECONDARY:
1793                 setcmd = IPA_SBP_SET_SECONDARY_BRIDGE_PORT;
1794                 cmdlength = sizeof(struct qeth_sbp_set_secondary);
1795                 break;
1796         default:
1797                 return -EINVAL;
1798         }
1799         if (!(card->options.sbp.supported_funcs & setcmd))
1800                 return -EOPNOTSUPP;
1801         iob = qeth_sbp_build_cmd(card, setcmd, cmdlength);
1802         if (!iob)
1803                 return -ENOMEM;
1804         rc = qeth_send_ipa_cmd(card, iob, qeth_bridgeport_set_cb,
1805                                 (void *)&cbctl);
1806         if (rc < 0)
1807                 return rc;
1808         return qeth_bridgeport_makerc(card, &cbctl, setcmd);
1809 }
1810
1811 /**
1812  * qeth_anset_makerc() - derive "traditional" error from hardware codes.
1813  * @card:                     qeth_card structure pointer, for debug messages.
1814  *
1815  * Returns negative errno-compatible error indication or 0 on success.
1816  */
1817 static int qeth_anset_makerc(struct qeth_card *card, int pnso_rc, u16 response)
1818 {
1819         int rc;
1820
1821         if (pnso_rc == 0)
1822                 switch (response) {
1823                 case 0x0001:
1824                         rc = 0;
1825                         break;
1826                 case 0x0004:
1827                 case 0x0100:
1828                 case 0x0106:
1829                         rc = -EOPNOTSUPP;
1830                         dev_err(&card->gdev->dev,
1831                                 "Setting address notification failed\n");
1832                         break;
1833                 case 0x0107:
1834                         rc = -EAGAIN;
1835                         break;
1836                 default:
1837                         rc = -EIO;
1838                 }
1839         else
1840                 rc = -EIO;
1841
1842         if (rc) {
1843                 QETH_CARD_TEXT_(card, 2, "SBPp%04x", pnso_rc);
1844                 QETH_CARD_TEXT_(card, 2, "SBPr%04x", response);
1845         }
1846         return rc;
1847 }
1848
1849 static void qeth_bridgeport_an_set_cb(void *priv,
1850                 enum qdio_brinfo_entry_type type, void *entry)
1851 {
1852         struct qeth_card *card = (struct qeth_card *)priv;
1853         struct qdio_brinfo_entry_l2 *l2entry;
1854         u8 code;
1855
1856         if (type != l2_addr_lnid) {
1857                 WARN_ON_ONCE(1);
1858                 return;
1859         }
1860
1861         l2entry = (struct qdio_brinfo_entry_l2 *)entry;
1862         code = IPA_ADDR_CHANGE_CODE_MACADDR;
1863         if (l2entry->addr_lnid.lnid)
1864                 code |= IPA_ADDR_CHANGE_CODE_VLANID;
1865         qeth_bridge_emit_host_event(card, anev_reg_unreg, code,
1866                 (struct net_if_token *)&l2entry->nit,
1867                 (struct mac_addr_lnid *)&l2entry->addr_lnid);
1868 }
1869
1870 /**
1871  * qeth_bridgeport_an_set() - Enable or disable bridgeport address notification
1872  * @card:                     qeth_card structure pointer.
1873  * @enable:                   0 - disable, non-zero - enable notifications
1874  *
1875  * Returns negative errno-compatible error indication or 0 on success.
1876  *
1877  * On enable, emits a series of address notifications udev events for all
1878  * currently registered hosts.
1879  */
1880 int qeth_bridgeport_an_set(struct qeth_card *card, int enable)
1881 {
1882         int rc;
1883         u16 response;
1884         struct ccw_device *ddev;
1885         struct subchannel_id schid;
1886
1887         if (!card)
1888                 return -EINVAL;
1889         if (!card->options.sbp.supported_funcs)
1890                 return -EOPNOTSUPP;
1891         ddev = CARD_DDEV(card);
1892         ccw_device_get_schid(ddev, &schid);
1893
1894         if (enable) {
1895                 qeth_bridge_emit_host_event(card, anev_reset, 0, NULL, NULL);
1896                 rc = qdio_pnso_brinfo(schid, 1, &response,
1897                         qeth_bridgeport_an_set_cb, card);
1898         } else
1899                 rc = qdio_pnso_brinfo(schid, 0, &response, NULL, NULL);
1900         return qeth_anset_makerc(card, rc, response);
1901 }
1902
1903 static bool qeth_bridgeport_is_in_use(struct qeth_card *card)
1904 {
1905         return (card->options.sbp.role || card->options.sbp.reflect_promisc ||
1906                 card->options.sbp.hostnotification);
1907 }
1908
1909 /* VNIC Characteristics support */
1910
1911 /* handle VNICC IPA command return codes; convert to error codes */
1912 static int qeth_l2_vnicc_makerc(struct qeth_card *card, int ipa_rc)
1913 {
1914         int rc;
1915
1916         switch (ipa_rc) {
1917         case IPA_RC_SUCCESS:
1918                 return ipa_rc;
1919         case IPA_RC_L2_UNSUPPORTED_CMD:
1920         case IPA_RC_NOTSUPP:
1921                 rc = -EOPNOTSUPP;
1922                 break;
1923         case IPA_RC_VNICC_OOSEQ:
1924                 rc = -EALREADY;
1925                 break;
1926         case IPA_RC_VNICC_VNICBP:
1927                 rc = -EBUSY;
1928                 break;
1929         case IPA_RC_L2_ADDR_TABLE_FULL:
1930                 rc = -ENOSPC;
1931                 break;
1932         case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
1933                 rc = -EACCES;
1934                 break;
1935         default:
1936                 rc = -EIO;
1937         }
1938
1939         QETH_CARD_TEXT_(card, 2, "err%04x", ipa_rc);
1940         return rc;
1941 }
1942
1943 /* generic VNICC request call back control */
1944 struct _qeth_l2_vnicc_request_cbctl {
1945         u32 sub_cmd;
1946         struct {
1947                 u32 vnic_char;
1948                 u32 timeout;
1949         } param;
1950         struct {
1951                 union{
1952                         u32 *sup_cmds;
1953                         u32 *timeout;
1954                 };
1955         } result;
1956 };
1957
1958 /* generic VNICC request call back */
1959 static int qeth_l2_vnicc_request_cb(struct qeth_card *card,
1960                                     struct qeth_reply *reply,
1961                                     unsigned long data)
1962 {
1963         struct _qeth_l2_vnicc_request_cbctl *cbctl =
1964                 (struct _qeth_l2_vnicc_request_cbctl *) reply->param;
1965         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1966         struct qeth_ipacmd_vnicc *rep = &cmd->data.vnicc;
1967
1968         QETH_CARD_TEXT(card, 2, "vniccrcb");
1969         if (cmd->hdr.return_code)
1970                 return 0;
1971         /* return results to caller */
1972         card->options.vnicc.sup_chars = rep->hdr.sup;
1973         card->options.vnicc.cur_chars = rep->hdr.cur;
1974
1975         if (cbctl->sub_cmd == IPA_VNICC_QUERY_CMDS)
1976                 *cbctl->result.sup_cmds = rep->query_cmds.sup_cmds;
1977
1978         if (cbctl->sub_cmd == IPA_VNICC_GET_TIMEOUT)
1979                 *cbctl->result.timeout = rep->getset_timeout.timeout;
1980
1981         return 0;
1982 }
1983
1984 /* generic VNICC request */
1985 static int qeth_l2_vnicc_request(struct qeth_card *card,
1986                                  struct _qeth_l2_vnicc_request_cbctl *cbctl)
1987 {
1988         struct qeth_ipacmd_vnicc *req;
1989         struct qeth_cmd_buffer *iob;
1990         struct qeth_ipa_cmd *cmd;
1991         int rc;
1992
1993         QETH_CARD_TEXT(card, 2, "vniccreq");
1994
1995         /* get new buffer for request */
1996         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_VNICC, 0);
1997         if (!iob)
1998                 return -ENOMEM;
1999
2000         /* create header for request */
2001         cmd = __ipa_cmd(iob);
2002         req = &cmd->data.vnicc;
2003
2004         /* create sub command header for request */
2005         req->sub_hdr.data_length = sizeof(req->sub_hdr);
2006         req->sub_hdr.sub_command = cbctl->sub_cmd;
2007
2008         /* create sub command specific request fields */
2009         switch (cbctl->sub_cmd) {
2010         case IPA_VNICC_QUERY_CHARS:
2011                 break;
2012         case IPA_VNICC_QUERY_CMDS:
2013                 req->sub_hdr.data_length += sizeof(req->query_cmds);
2014                 req->query_cmds.vnic_char = cbctl->param.vnic_char;
2015                 break;
2016         case IPA_VNICC_ENABLE:
2017         case IPA_VNICC_DISABLE:
2018                 req->sub_hdr.data_length += sizeof(req->set_char);
2019                 req->set_char.vnic_char = cbctl->param.vnic_char;
2020                 break;
2021         case IPA_VNICC_SET_TIMEOUT:
2022                 req->getset_timeout.timeout = cbctl->param.timeout;
2023                 /* fallthrough */
2024         case IPA_VNICC_GET_TIMEOUT:
2025                 req->sub_hdr.data_length += sizeof(req->getset_timeout);
2026                 req->getset_timeout.vnic_char = cbctl->param.vnic_char;
2027                 break;
2028         default:
2029                 qeth_release_buffer(iob->channel, iob);
2030                 return -EOPNOTSUPP;
2031         }
2032
2033         /* send request */
2034         rc = qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb,
2035                                (void *) cbctl);
2036
2037         return qeth_l2_vnicc_makerc(card, rc);
2038 }
2039
2040 /* VNICC query VNIC characteristics request */
2041 static int qeth_l2_vnicc_query_chars(struct qeth_card *card)
2042 {
2043         struct _qeth_l2_vnicc_request_cbctl cbctl;
2044
2045         /* prepare callback control */
2046         cbctl.sub_cmd = IPA_VNICC_QUERY_CHARS;
2047
2048         QETH_CARD_TEXT(card, 2, "vniccqch");
2049         return qeth_l2_vnicc_request(card, &cbctl);
2050 }
2051
2052 /* VNICC query sub commands request */
2053 static int qeth_l2_vnicc_query_cmds(struct qeth_card *card, u32 vnic_char,
2054                                     u32 *sup_cmds)
2055 {
2056         struct _qeth_l2_vnicc_request_cbctl cbctl;
2057
2058         /* prepare callback control */
2059         cbctl.sub_cmd = IPA_VNICC_QUERY_CMDS;
2060         cbctl.param.vnic_char = vnic_char;
2061         cbctl.result.sup_cmds = sup_cmds;
2062
2063         QETH_CARD_TEXT(card, 2, "vniccqcm");
2064         return qeth_l2_vnicc_request(card, &cbctl);
2065 }
2066
2067 /* VNICC enable/disable characteristic request */
2068 static int qeth_l2_vnicc_set_char(struct qeth_card *card, u32 vnic_char,
2069                                       u32 cmd)
2070 {
2071         struct _qeth_l2_vnicc_request_cbctl cbctl;
2072
2073         /* prepare callback control */
2074         cbctl.sub_cmd = cmd;
2075         cbctl.param.vnic_char = vnic_char;
2076
2077         QETH_CARD_TEXT(card, 2, "vniccedc");
2078         return qeth_l2_vnicc_request(card, &cbctl);
2079 }
2080
2081 /* VNICC get/set timeout for characteristic request */
2082 static int qeth_l2_vnicc_getset_timeout(struct qeth_card *card, u32 vnicc,
2083                                         u32 cmd, u32 *timeout)
2084 {
2085         struct _qeth_l2_vnicc_request_cbctl cbctl;
2086
2087         /* prepare callback control */
2088         cbctl.sub_cmd = cmd;
2089         cbctl.param.vnic_char = vnicc;
2090         if (cmd == IPA_VNICC_SET_TIMEOUT)
2091                 cbctl.param.timeout = *timeout;
2092         if (cmd == IPA_VNICC_GET_TIMEOUT)
2093                 cbctl.result.timeout = timeout;
2094
2095         QETH_CARD_TEXT(card, 2, "vniccgst");
2096         return qeth_l2_vnicc_request(card, &cbctl);
2097 }
2098
2099 /* set current VNICC flag state; called from sysfs store function */
2100 int qeth_l2_vnicc_set_state(struct qeth_card *card, u32 vnicc, bool state)
2101 {
2102         int rc = 0;
2103         u32 cmd;
2104
2105         QETH_CARD_TEXT(card, 2, "vniccsch");
2106
2107         /* do not change anything if BridgePort is enabled */
2108         if (qeth_bridgeport_is_in_use(card))
2109                 return -EBUSY;
2110
2111         /* check if characteristic and enable/disable are supported */
2112         if (!(card->options.vnicc.sup_chars & vnicc) ||
2113             !(card->options.vnicc.set_char_sup & vnicc))
2114                 return -EOPNOTSUPP;
2115
2116         /* set enable/disable command and store wanted characteristic */
2117         if (state) {
2118                 cmd = IPA_VNICC_ENABLE;
2119                 card->options.vnicc.wanted_chars |= vnicc;
2120         } else {
2121                 cmd = IPA_VNICC_DISABLE;
2122                 card->options.vnicc.wanted_chars &= ~vnicc;
2123         }
2124
2125         /* do we need to do anything? */
2126         if (card->options.vnicc.cur_chars == card->options.vnicc.wanted_chars)
2127                 return rc;
2128
2129         /* if card is not ready, simply stop here */
2130         if (!qeth_card_hw_is_reachable(card)) {
2131                 if (state)
2132                         card->options.vnicc.cur_chars |= vnicc;
2133                 else
2134                         card->options.vnicc.cur_chars &= ~vnicc;
2135                 return rc;
2136         }
2137
2138         rc = qeth_l2_vnicc_set_char(card, vnicc, cmd);
2139         if (rc)
2140                 card->options.vnicc.wanted_chars =
2141                         card->options.vnicc.cur_chars;
2142         else {
2143                 /* successful online VNICC change; handle special cases */
2144                 if (state && vnicc == QETH_VNICC_RX_BCAST)
2145                         card->options.vnicc.rx_bcast_enabled = true;
2146                 if (!state && vnicc == QETH_VNICC_LEARNING)
2147                         qeth_l2_vnicc_recover_timeout(card, vnicc,
2148                                         &card->options.vnicc.learning_timeout);
2149         }
2150
2151         return rc;
2152 }
2153
2154 /* get current VNICC flag state; called from sysfs show function */
2155 int qeth_l2_vnicc_get_state(struct qeth_card *card, u32 vnicc, bool *state)
2156 {
2157         int rc = 0;
2158
2159         QETH_CARD_TEXT(card, 2, "vniccgch");
2160
2161         /* do not get anything if BridgePort is enabled */
2162         if (qeth_bridgeport_is_in_use(card))
2163                 return -EBUSY;
2164
2165         /* check if characteristic is supported */
2166         if (!(card->options.vnicc.sup_chars & vnicc))
2167                 return -EOPNOTSUPP;
2168
2169         /* if card is ready, query current VNICC state */
2170         if (qeth_card_hw_is_reachable(card))
2171                 rc = qeth_l2_vnicc_query_chars(card);
2172
2173         *state = (card->options.vnicc.cur_chars & vnicc) ? true : false;
2174         return rc;
2175 }
2176
2177 /* set VNICC timeout; called from sysfs store function. Currently, only learning
2178  * supports timeout
2179  */
2180 int qeth_l2_vnicc_set_timeout(struct qeth_card *card, u32 timeout)
2181 {
2182         int rc = 0;
2183
2184         QETH_CARD_TEXT(card, 2, "vniccsto");
2185
2186         /* do not change anything if BridgePort is enabled */
2187         if (qeth_bridgeport_is_in_use(card))
2188                 return -EBUSY;
2189
2190         /* check if characteristic and set_timeout are supported */
2191         if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
2192             !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
2193                 return -EOPNOTSUPP;
2194
2195         /* do we need to do anything? */
2196         if (card->options.vnicc.learning_timeout == timeout)
2197                 return rc;
2198
2199         /* if card is not ready, simply store the value internally and return */
2200         if (!qeth_card_hw_is_reachable(card)) {
2201                 card->options.vnicc.learning_timeout = timeout;
2202                 return rc;
2203         }
2204
2205         /* send timeout value to card; if successful, store value internally */
2206         rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
2207                                           IPA_VNICC_SET_TIMEOUT, &timeout);
2208         if (!rc)
2209                 card->options.vnicc.learning_timeout = timeout;
2210
2211         return rc;
2212 }
2213
2214 /* get current VNICC timeout; called from sysfs show function. Currently, only
2215  * learning supports timeout
2216  */
2217 int qeth_l2_vnicc_get_timeout(struct qeth_card *card, u32 *timeout)
2218 {
2219         int rc = 0;
2220
2221         QETH_CARD_TEXT(card, 2, "vniccgto");
2222
2223         /* do not get anything if BridgePort is enabled */
2224         if (qeth_bridgeport_is_in_use(card))
2225                 return -EBUSY;
2226
2227         /* check if characteristic and get_timeout are supported */
2228         if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
2229             !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
2230                 return -EOPNOTSUPP;
2231         /* if card is ready, get timeout. Otherwise, just return stored value */
2232         *timeout = card->options.vnicc.learning_timeout;
2233         if (qeth_card_hw_is_reachable(card))
2234                 rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
2235                                                   IPA_VNICC_GET_TIMEOUT,
2236                                                   timeout);
2237
2238         return rc;
2239 }
2240
2241 /* check if VNICC is currently enabled */
2242 bool qeth_l2_vnicc_is_in_use(struct qeth_card *card)
2243 {
2244         /* if everything is turned off, VNICC is not active */
2245         if (!card->options.vnicc.cur_chars)
2246                 return false;
2247         /* default values are only OK if rx_bcast was not enabled by user
2248          * or the card is offline.
2249          */
2250         if (card->options.vnicc.cur_chars == QETH_VNICC_DEFAULT) {
2251                 if (!card->options.vnicc.rx_bcast_enabled ||
2252                     !qeth_card_hw_is_reachable(card))
2253                         return false;
2254         }
2255         return true;
2256 }
2257
2258 /* recover user timeout setting */
2259 static bool qeth_l2_vnicc_recover_timeout(struct qeth_card *card, u32 vnicc,
2260                                           u32 *timeout)
2261 {
2262         if (card->options.vnicc.sup_chars & vnicc &&
2263             card->options.vnicc.getset_timeout_sup & vnicc &&
2264             !qeth_l2_vnicc_getset_timeout(card, vnicc, IPA_VNICC_SET_TIMEOUT,
2265                                           timeout))
2266                 return false;
2267         *timeout = QETH_VNICC_DEFAULT_TIMEOUT;
2268         return true;
2269 }
2270
2271 /* recover user characteristic setting */
2272 static bool qeth_l2_vnicc_recover_char(struct qeth_card *card, u32 vnicc,
2273                                        bool enable)
2274 {
2275         u32 cmd = enable ? IPA_VNICC_ENABLE : IPA_VNICC_DISABLE;
2276
2277         if (card->options.vnicc.sup_chars & vnicc &&
2278             card->options.vnicc.set_char_sup & vnicc &&
2279             !qeth_l2_vnicc_set_char(card, vnicc, cmd))
2280                 return false;
2281         card->options.vnicc.wanted_chars &= ~vnicc;
2282         card->options.vnicc.wanted_chars |= QETH_VNICC_DEFAULT & vnicc;
2283         return true;
2284 }
2285
2286 /* (re-)initialize VNICC */
2287 static void qeth_l2_vnicc_init(struct qeth_card *card)
2288 {
2289         u32 *timeout = &card->options.vnicc.learning_timeout;
2290         unsigned int chars_len, i;
2291         unsigned long chars_tmp;
2292         u32 sup_cmds, vnicc;
2293         bool enable, error;
2294
2295         QETH_CARD_TEXT(card, 2, "vniccini");
2296         /* reset rx_bcast */
2297         card->options.vnicc.rx_bcast_enabled = 0;
2298         /* initial query and storage of VNIC characteristics */
2299         if (qeth_l2_vnicc_query_chars(card)) {
2300                 if (card->options.vnicc.wanted_chars != QETH_VNICC_DEFAULT ||
2301                     *timeout != QETH_VNICC_DEFAULT_TIMEOUT)
2302                         dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
2303                 /* fail quietly if user didn't change the default config */
2304                 card->options.vnicc.sup_chars = 0;
2305                 card->options.vnicc.cur_chars = 0;
2306                 card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
2307                 return;
2308         }
2309         /* get supported commands for each supported characteristic */
2310         chars_tmp = card->options.vnicc.sup_chars;
2311         chars_len = sizeof(card->options.vnicc.sup_chars) * BITS_PER_BYTE;
2312         for_each_set_bit(i, &chars_tmp, chars_len) {
2313                 vnicc = BIT(i);
2314                 qeth_l2_vnicc_query_cmds(card, vnicc, &sup_cmds);
2315                 if (!(sup_cmds & IPA_VNICC_SET_TIMEOUT) ||
2316                     !(sup_cmds & IPA_VNICC_GET_TIMEOUT))
2317                         card->options.vnicc.getset_timeout_sup &= ~vnicc;
2318                 if (!(sup_cmds & IPA_VNICC_ENABLE) ||
2319                     !(sup_cmds & IPA_VNICC_DISABLE))
2320                         card->options.vnicc.set_char_sup &= ~vnicc;
2321         }
2322         /* enforce assumed default values and recover settings, if changed  */
2323         error = qeth_l2_vnicc_recover_timeout(card, QETH_VNICC_LEARNING,
2324                                               timeout);
2325         chars_tmp = card->options.vnicc.wanted_chars ^ QETH_VNICC_DEFAULT;
2326         chars_tmp |= QETH_VNICC_BRIDGE_INVISIBLE;
2327         chars_len = sizeof(card->options.vnicc.wanted_chars) * BITS_PER_BYTE;
2328         for_each_set_bit(i, &chars_tmp, chars_len) {
2329                 vnicc = BIT(i);
2330                 enable = card->options.vnicc.wanted_chars & vnicc;
2331                 error |= qeth_l2_vnicc_recover_char(card, vnicc, enable);
2332         }
2333         if (error)
2334                 dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
2335 }
2336
2337 /* configure default values of VNIC characteristics */
2338 static void qeth_l2_vnicc_set_defaults(struct qeth_card *card)
2339 {
2340         /* characteristics values */
2341         card->options.vnicc.sup_chars = QETH_VNICC_ALL;
2342         card->options.vnicc.cur_chars = QETH_VNICC_DEFAULT;
2343         card->options.vnicc.learning_timeout = QETH_VNICC_DEFAULT_TIMEOUT;
2344         /* supported commands */
2345         card->options.vnicc.set_char_sup = QETH_VNICC_ALL;
2346         card->options.vnicc.getset_timeout_sup = QETH_VNICC_LEARNING;
2347         /* settings wanted by users */
2348         card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
2349 }
2350
2351 module_init(qeth_l2_init);
2352 module_exit(qeth_l2_exit);
2353 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
2354 MODULE_DESCRIPTION("qeth layer 2 discipline");
2355 MODULE_LICENSE("GPL");