drivers/s390/net/qeth_l2_main.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *    Copyright IBM Corp. 2007, 2009
   4  *    Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
   5  *               Frank Pavlic <fpavlic@de.ibm.com>,
   6  *               Thomas Spatzier <tspat@de.ibm.com>,
   7  *               Frank Blaschka <frank.blaschka@de.ibm.com>
   8  */
   9
  10 #define KMSG_COMPONENT "qeth"
  11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  12
  13 #include <linux/module.h>
  14 #include <linux/moduleparam.h>
  15 #include <linux/string.h>
  16 #include <linux/errno.h>
  17 #include <linux/kernel.h>
  18 #include <linux/slab.h>
  19 #include <linux/etherdevice.h>
  20 #include <linux/list.h>
  21 #include <linux/hash.h>
  22 #include <linux/hashtable.h>
  23 #include <asm/setup.h>
  24 #include "qeth_core.h"
  25 #include "qeth_l2.h"
  26
  27 static int qeth_l2_set_offline(struct ccwgroup_device *);
  28 static int qeth_l2_stop(struct net_device *);
  29 static void qeth_bridgeport_query_support(struct qeth_card *card);
  30 static void qeth_bridge_state_change(struct qeth_card *card,
  31                                         struct qeth_ipa_cmd *cmd);
  32 static void qeth_bridge_host_event(struct qeth_card *card,
  33                                         struct qeth_ipa_cmd *cmd);
  34 static void qeth_l2_vnicc_set_defaults(struct qeth_card *card);
  35 static void qeth_l2_vnicc_init(struct qeth_card *card);
  36 static bool qeth_l2_vnicc_recover_timeout(struct qeth_card *card, u32 vnicc,
  37                                           u32 *timeout);
  38
  39 static struct net_device *qeth_l2_netdev_by_devno(unsigned char *read_dev_no)
  40 {
  41         struct qeth_card *card;
  42         struct net_device *ndev;
  43         __u16 temp_dev_no;
  44         unsigned long flags;
  45         struct ccw_dev_id read_devid;
  46
  47         ndev = NULL;
  48         memcpy(&temp_dev_no, read_dev_no, 2);
  49         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
  50         list_for_each_entry(card, &qeth_core_card_list.list, list) {
  51                 ccw_device_get_id(CARD_RDEV(card), &read_devid);
  52                 if (read_devid.devno == temp_dev_no) {
  53                         ndev = card->dev;
  54                         break;
  55                 }
  56         }
  57         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
  58         return ndev;
  59 }
  60
  61 static int qeth_setdelmac_makerc(struct qeth_card *card, int retcode)
  62 {
  63         int rc;
  64
  65         if (retcode)
  66                 QETH_CARD_TEXT_(card, 2, "err%04x", retcode);
  67         switch (retcode) {
  68         case IPA_RC_SUCCESS:
  69                 rc = 0;
  70                 break;
  71         case IPA_RC_L2_UNSUPPORTED_CMD:
  72                 rc = -EOPNOTSUPP;
  73                 break;
  74         case IPA_RC_L2_ADDR_TABLE_FULL:
  75                 rc = -ENOSPC;
  76                 break;
  77         case IPA_RC_L2_DUP_MAC:
  78         case IPA_RC_L2_DUP_LAYER3_MAC:
  79                 rc = -EEXIST;
  80                 break;
  81         case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
  82         case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
  83                 rc = -EPERM;
  84                 break;
  85         case IPA_RC_L2_MAC_NOT_FOUND:
  86                 rc = -ENOENT;
  87                 break;
  88         case -ENOMEM:
  89                 rc = -ENOMEM;
  90                 break;
  91         default:
  92                 rc = -EIO;
  93                 break;
  94         }
  95         return rc;
  96 }
  97
  98 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
  99                            enum qeth_ipa_cmds ipacmd)
 100 {
 101         struct qeth_ipa_cmd *cmd;
 102         struct qeth_cmd_buffer *iob;
 103
 104         QETH_CARD_TEXT(card, 2, "L2sdmac");
 105         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 106         if (!iob)
 107                 return -ENOMEM;
 108         cmd = __ipa_cmd(iob);
 109         cmd->data.setdelmac.mac_length = ETH_ALEN;
 110         ether_addr_copy(cmd->data.setdelmac.mac, mac);
 111         return qeth_setdelmac_makerc(card, qeth_send_ipa_cmd(card, iob,
 112                                            NULL, NULL));
 113 }
 114
 115 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
 116 {
 117         int rc;
 118
 119         QETH_CARD_TEXT(card, 2, "L2Setmac");
 120         rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC);
 121         if (rc == 0) {
 122                 dev_info(&card->gdev->dev,
 123                          "MAC address %pM successfully registered on device %s\n",
 124                          mac, card->dev->name);
 125         } else {
 126                 switch (rc) {
 127                 case -EEXIST:
 128                         dev_warn(&card->gdev->dev,
 129                                 "MAC address %pM already exists\n", mac);
 130                         break;
 131                 case -EPERM:
 132                         dev_warn(&card->gdev->dev,
 133                                 "MAC address %pM is not authorized\n", mac);
 134                         break;
 135                 }
 136         }
 137         return rc;
 138 }
 139
 140 static int qeth_l2_write_mac(struct qeth_card *card, u8 *mac)
 141 {
 142         enum qeth_ipa_cmds cmd = is_multicast_ether_addr(mac) ?
 143                                         IPA_CMD_SETGMAC : IPA_CMD_SETVMAC;
 144         int rc;
 145
 146         QETH_CARD_TEXT(card, 2, "L2Wmac");
 147         rc = qeth_l2_send_setdelmac(card, mac, cmd);
 148         if (rc == -EEXIST)
 149                 QETH_DBF_MESSAGE(2, "MAC %pM already registered on %s\n",
 150                                  mac, QETH_CARD_IFNAME(card));
 151         else if (rc)
 152                 QETH_DBF_MESSAGE(2, "Failed to register MAC %pM on %s: %d\n",
 153                                  mac, QETH_CARD_IFNAME(card), rc);
 154         return rc;
 155 }
 156
 157 static int qeth_l2_remove_mac(struct qeth_card *card, u8 *mac)
 158 {
 159         enum qeth_ipa_cmds cmd = is_multicast_ether_addr(mac) ?
 160                                         IPA_CMD_DELGMAC : IPA_CMD_DELVMAC;
 161         int rc;
 162
 163         QETH_CARD_TEXT(card, 2, "L2Rmac");
 164         rc = qeth_l2_send_setdelmac(card, mac, cmd);
 165         if (rc)
 166                 QETH_DBF_MESSAGE(2, "Failed to delete MAC %pM on %s: %d\n",
 167                                  mac, QETH_CARD_IFNAME(card), rc);
 168         return rc;
 169 }
 170
 171 static void qeth_l2_del_all_macs(struct qeth_card *card)
 172 {
 173         struct qeth_mac *mac;
 174         struct hlist_node *tmp;
 175         int i;
 176
 177         spin_lock_bh(&card->mclock);
 178         hash_for_each_safe(card->mac_htable, i, tmp, mac, hnode) {
 179                 hash_del(&mac->hnode);
 180                 kfree(mac);
 181         }
 182         spin_unlock_bh(&card->mclock);
 183 }
 184
 185 static int qeth_l2_get_cast_type(struct qeth_card *card, struct sk_buff *skb)
 186 {
 187         if (card->info.type == QETH_CARD_TYPE_OSN)
 188                 return RTN_UNICAST;
 189         if (is_broadcast_ether_addr(skb->data))
 190                 return RTN_BROADCAST;
 191         if (is_multicast_ether_addr(skb->data))
 192                 return RTN_MULTICAST;
 193         return RTN_UNICAST;
 194 }
 195
 196 static void qeth_l2_fill_header(struct qeth_hdr *hdr, struct sk_buff *skb,
 197                                 int cast_type, unsigned int data_len)
 198 {
 199         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
 200
 201         memset(hdr, 0, sizeof(struct qeth_hdr));
 202         hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
 203         hdr->hdr.l2.pkt_length = data_len;
 204
 205         /* set byte byte 3 to casting flags */
 206         if (cast_type == RTN_MULTICAST)
 207                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 208         else if (cast_type == RTN_BROADCAST)
 209                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 210         else
 211                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 212
 213         /* VSWITCH relies on the VLAN
 214          * information to be present in
 215          * the QDIO header */
 216         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
 217                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
 218                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
 219         }
 220 }
 221
 222 static int qeth_setdelvlan_makerc(struct qeth_card *card, int retcode)
 223 {
 224         if (retcode)
 225                 QETH_CARD_TEXT_(card, 2, "err%04x", retcode);
 226
 227         switch (retcode) {
 228         case IPA_RC_SUCCESS:
 229                 return 0;
 230         case IPA_RC_L2_INVALID_VLAN_ID:
 231                 return -EINVAL;
 232         case IPA_RC_L2_DUP_VLAN_ID:
 233                 return -EEXIST;
 234         case IPA_RC_L2_VLAN_ID_NOT_FOUND:
 235                 return -ENOENT;
 236         case IPA_RC_L2_VLAN_ID_NOT_ALLOWED:
 237                 return -EPERM;
 238         case -ENOMEM:
 239                 return -ENOMEM;
 240         default:
 241                 return -EIO;
 242         }
 243 }
 244
 245 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
 246                                       struct qeth_reply *reply,
 247                                       unsigned long data)
 248 {
 249         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
 250
 251         QETH_CARD_TEXT(card, 2, "L2sdvcb");
 252         if (cmd->hdr.return_code) {
 253                 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x.\n",
 254                                  cmd->data.setdelvlan.vlan_id,
 255                                  QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 256                 QETH_CARD_TEXT_(card, 2, "L2VL%4x", cmd->hdr.command);
 257                 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code);
 258         }
 259         return 0;
 260 }
 261
 262 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
 263                                    enum qeth_ipa_cmds ipacmd)
 264 {
 265         struct qeth_ipa_cmd *cmd;
 266         struct qeth_cmd_buffer *iob;
 267
 268         QETH_CARD_TEXT_(card, 4, "L2sdv%x", ipacmd);
 269         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 270         if (!iob)
 271                 return -ENOMEM;
 272         cmd = __ipa_cmd(iob);
 273         cmd->data.setdelvlan.vlan_id = i;
 274         return qeth_setdelvlan_makerc(card, qeth_send_ipa_cmd(card, iob,
 275                                             qeth_l2_send_setdelvlan_cb, NULL));
 276 }
 277
 278 static void qeth_l2_process_vlans(struct qeth_card *card)
 279 {
 280         struct qeth_vlan_vid *id;
 281
 282         QETH_CARD_TEXT(card, 3, "L2prcvln");
 283         mutex_lock(&card->vid_list_mutex);
 284         list_for_each_entry(id, &card->vid_list, list) {
 285                 qeth_l2_send_setdelvlan(card, id->vid, IPA_CMD_SETVLAN);
 286         }
 287         mutex_unlock(&card->vid_list_mutex);
 288 }
 289
 290 static int qeth_l2_vlan_rx_add_vid(struct net_device *dev,
 291                                    __be16 proto, u16 vid)
 292 {
 293         struct qeth_card *card = dev->ml_priv;
 294         struct qeth_vlan_vid *id;
 295         int rc;
 296
 297         QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
 298         if (!vid)
 299                 return 0;
 300         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 301                 QETH_CARD_TEXT(card, 3, "aidREC");
 302                 return 0;
 303         }
 304         id = kmalloc(sizeof(*id), GFP_KERNEL);
 305         if (id) {
 306                 id->vid = vid;
 307                 rc = qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
 308                 if (rc) {
 309                         kfree(id);
 310                         return rc;
 311                 }
 312                 mutex_lock(&card->vid_list_mutex);
 313                 list_add_tail(&id->list, &card->vid_list);
 314                 mutex_unlock(&card->vid_list_mutex);
 315         } else {
 316                 return -ENOMEM;
 317         }
 318         return 0;
 319 }
 320
 321 static int qeth_l2_vlan_rx_kill_vid(struct net_device *dev,
 322                                     __be16 proto, u16 vid)
 323 {
 324         struct qeth_vlan_vid *id, *tmpid = NULL;
 325         struct qeth_card *card = dev->ml_priv;
 326         int rc = 0;
 327
 328         QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
 329         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 330                 QETH_CARD_TEXT(card, 3, "kidREC");
 331                 return 0;
 332         }
 333         mutex_lock(&card->vid_list_mutex);
 334         list_for_each_entry(id, &card->vid_list, list) {
 335                 if (id->vid == vid) {
 336                         list_del(&id->list);
 337                         tmpid = id;
 338                         break;
 339                 }
 340         }
 341         mutex_unlock(&card->vid_list_mutex);
 342         if (tmpid) {
 343                 rc = qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 344                 kfree(tmpid);
 345         }
 346         return rc;
 347 }
 348
 349 static void qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
 350 {
 351         QETH_DBF_TEXT(SETUP , 2, "stopcard");
 352         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 353
 354         qeth_set_allowed_threads(card, 0, 1);
 355         if (card->read.state == CH_STATE_UP &&
 356             card->write.state == CH_STATE_UP &&
 357             (card->state == CARD_STATE_UP)) {
 358                 if (recovery_mode &&
 359                     card->info.type != QETH_CARD_TYPE_OSN) {
 360                         qeth_l2_stop(card->dev);
 361                 } else {
 362                         rtnl_lock();
 363                         dev_close(card->dev);
 364                         rtnl_unlock();
 365                 }
 366                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 367                 card->state = CARD_STATE_SOFTSETUP;
 368         }
 369         if (card->state == CARD_STATE_SOFTSETUP) {
 370                 qeth_l2_del_all_macs(card);
 371                 qeth_clear_ipacmd_list(card);
 372                 card->state = CARD_STATE_HARDSETUP;
 373         }
 374         if (card->state == CARD_STATE_HARDSETUP) {
 375                 qeth_qdio_clear_card(card, 0);
 376                 qeth_clear_qdio_buffers(card);
 377                 qeth_clear_working_pool_list(card);
 378                 card->state = CARD_STATE_DOWN;
 379         }
 380         if (card->state == CARD_STATE_DOWN) {
 381                 qeth_clear_cmd_buffers(&card->read);
 382                 qeth_clear_cmd_buffers(&card->write);
 383         }
 384 }
 385
 386 static int qeth_l2_process_inbound_buffer(struct qeth_card *card,
 387                                 int budget, int *done)
 388 {
 389         int work_done = 0;
 390         struct sk_buff *skb;
 391         struct qeth_hdr *hdr;
 392         unsigned int len;
 393
 394         *done = 0;
 395         WARN_ON_ONCE(!budget);
 396         while (budget) {
 397                 skb = qeth_core_get_next_skb(card,
 398                         &card->qdio.in_q->bufs[card->rx.b_index],
 399                         &card->rx.b_element, &card->rx.e_offset, &hdr);
 400                 if (!skb) {
 401                         *done = 1;
 402                         break;
 403                 }
 404                 switch (hdr->hdr.l2.id) {
 405                 case QETH_HEADER_TYPE_LAYER2:
 406                         skb->protocol = eth_type_trans(skb, skb->dev);
 407                         qeth_rx_csum(card, skb, hdr->hdr.l2.flags[1]);
 408                         if (skb->protocol == htons(ETH_P_802_2))
 409                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
 410                         len = skb->len;
 411                         napi_gro_receive(&card->napi, skb);
 412                         break;
 413                 case QETH_HEADER_TYPE_OSN:
 414                         if (card->info.type == QETH_CARD_TYPE_OSN) {
 415                                 skb_push(skb, sizeof(struct qeth_hdr));
 416                                 skb_copy_to_linear_data(skb, hdr,
 417                                                 sizeof(struct qeth_hdr));
 418                                 len = skb->len;
 419                                 card->osn_info.data_cb(skb);
 420                                 break;
 421                         }
 422                         /* else unknown */
 423                 default:
 424                         dev_kfree_skb_any(skb);
 425                         QETH_CARD_TEXT(card, 3, "inbunkno");
 426                         QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
 427                         continue;
 428                 }
 429                 work_done++;
 430                 budget--;
 431                 card->stats.rx_packets++;
 432                 card->stats.rx_bytes += len;
 433         }
 434         return work_done;
 435 }
 436
 437 static int qeth_l2_request_initial_mac(struct qeth_card *card)
 438 {
 439         int rc = 0;
 440
 441         QETH_DBF_TEXT(SETUP, 2, "l2reqmac");
 442         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
 443
 444         if (MACHINE_IS_VM) {
 445                 rc = qeth_vm_request_mac(card);
 446                 if (!rc)
 447                         goto out;
 448                 QETH_DBF_MESSAGE(2, "z/VM MAC Service failed on device %s: x%x\n",
 449                                  CARD_BUS_ID(card), rc);
 450                 QETH_DBF_TEXT_(SETUP, 2, "err%04x", rc);
 451                 /* fall back to alternative mechanism: */
 452         }
 453
 454         if (card->info.type == QETH_CARD_TYPE_IQD ||
 455             card->info.type == QETH_CARD_TYPE_OSM ||
 456             card->info.type == QETH_CARD_TYPE_OSX ||
 457             card->info.guestlan) {
 458                 rc = qeth_setadpparms_change_macaddr(card);
 459                 if (!rc)
 460                         goto out;
 461                 QETH_DBF_MESSAGE(2, "READ_MAC Assist failed on device %s: x%x\n",
 462                                  CARD_BUS_ID(card), rc);
 463                 QETH_DBF_TEXT_(SETUP, 2, "1err%04x", rc);
 464                 /* fall back once more: */
 465         }
 466
 467         /* some devices don't support a custom MAC address: */
 468         if (card->info.type == QETH_CARD_TYPE_OSM ||
 469             card->info.type == QETH_CARD_TYPE_OSX)
 470                 return (rc) ? rc : -EADDRNOTAVAIL;
 471         eth_hw_addr_random(card->dev);
 472
 473 out:
 474         QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, card->dev->addr_len);
 475         return 0;
 476 }
 477
 478 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 479 {
 480         struct sockaddr *addr = p;
 481         struct qeth_card *card = dev->ml_priv;
 482         u8 old_addr[ETH_ALEN];
 483         int rc = 0;
 484
 485         QETH_CARD_TEXT(card, 3, "setmac");
 486
 487         if (card->info.type == QETH_CARD_TYPE_OSN ||
 488             card->info.type == QETH_CARD_TYPE_OSM ||
 489             card->info.type == QETH_CARD_TYPE_OSX) {
 490                 QETH_CARD_TEXT(card, 3, "setmcTYP");
 491                 return -EOPNOTSUPP;
 492         }
 493         QETH_CARD_HEX(card, 3, addr->sa_data, ETH_ALEN);
 494         if (!is_valid_ether_addr(addr->sa_data))
 495                 return -EADDRNOTAVAIL;
 496
 497         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 498                 QETH_CARD_TEXT(card, 3, "setmcREC");
 499                 return -ERESTARTSYS;
 500         }
 501
 502         /* avoid racing against concurrent state change: */
 503         if (!mutex_trylock(&card->conf_mutex))
 504                 return -EAGAIN;
 505
 506         if (!qeth_card_hw_is_reachable(card)) {
 507                 ether_addr_copy(dev->dev_addr, addr->sa_data);
 508                 goto out_unlock;
 509         }
 510
 511         /* don't register the same address twice */
 512         if (ether_addr_equal_64bits(dev->dev_addr, addr->sa_data) &&
 513             (card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
 514                 goto out_unlock;
 515
 516         /* add the new address, switch over, drop the old */
 517         rc = qeth_l2_send_setmac(card, addr->sa_data);
 518         if (rc)
 519                 goto out_unlock;
 520         ether_addr_copy(old_addr, dev->dev_addr);
 521         ether_addr_copy(dev->dev_addr, addr->sa_data);
 522
 523         if (card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED)
 524                 qeth_l2_remove_mac(card, old_addr);
 525         card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 526
 527 out_unlock:
 528         mutex_unlock(&card->conf_mutex);
 529         return rc;
 530 }
 531
 532 static void qeth_promisc_to_bridge(struct qeth_card *card)
 533 {
 534         struct net_device *dev = card->dev;
 535         enum qeth_ipa_promisc_modes promisc_mode;
 536         int role;
 537         int rc;
 538
 539         QETH_CARD_TEXT(card, 3, "pmisc2br");
 540
 541         if (!card->options.sbp.reflect_promisc)
 542                 return;
 543         promisc_mode = (dev->flags & IFF_PROMISC) ? SET_PROMISC_MODE_ON
 544                                                 : SET_PROMISC_MODE_OFF;
 545         if (promisc_mode == card->info.promisc_mode)
 546                 return;
 547
 548         if (promisc_mode == SET_PROMISC_MODE_ON) {
 549                 if (card->options.sbp.reflect_promisc_primary)
 550                         role = QETH_SBP_ROLE_PRIMARY;
 551                 else
 552                         role = QETH_SBP_ROLE_SECONDARY;
 553         } else
 554                 role = QETH_SBP_ROLE_NONE;
 555
 556         rc = qeth_bridgeport_setrole(card, role);
 557         QETH_DBF_TEXT_(SETUP, 2, "bpm%c%04x",
 558                         (promisc_mode == SET_PROMISC_MODE_ON) ? '+' : '-', rc);
 559         if (!rc) {
 560                 card->options.sbp.role = role;
 561                 card->info.promisc_mode = promisc_mode;
 562         }
 563
 564 }
 565 /* New MAC address is added to the hash table and marked to be written on card
 566  * only if there is not in the hash table storage already
 567  *
 568 */
 569 static void qeth_l2_add_mac(struct qeth_card *card, struct netdev_hw_addr *ha)
 570 {
 571         u32 mac_hash = get_unaligned((u32 *)(&ha->addr[2]));
 572         struct qeth_mac *mac;
 573
 574         hash_for_each_possible(card->mac_htable, mac, hnode, mac_hash) {
 575                 if (ether_addr_equal_64bits(ha->addr, mac->mac_addr)) {
 576                         mac->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
 577                         return;
 578                 }
 579         }
 580
 581         mac = kzalloc(sizeof(struct qeth_mac), GFP_ATOMIC);
 582         if (!mac)
 583                 return;
 584
 585         ether_addr_copy(mac->mac_addr, ha->addr);
 586         mac->disp_flag = QETH_DISP_ADDR_ADD;
 587
 588         hash_add(card->mac_htable, &mac->hnode, mac_hash);
 589 }
 590
 591 static void qeth_l2_set_rx_mode(struct net_device *dev)
 592 {
 593         struct qeth_card *card = dev->ml_priv;
 594         struct netdev_hw_addr *ha;
 595         struct qeth_mac *mac;
 596         struct hlist_node *tmp;
 597         int i;
 598         int rc;
 599
 600         if (card->info.type == QETH_CARD_TYPE_OSN)
 601                 return;
 602
 603         QETH_CARD_TEXT(card, 3, "setmulti");
 604         if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
 605             (card->state != CARD_STATE_UP))
 606                 return;
 607
 608         spin_lock_bh(&card->mclock);
 609
 610         netdev_for_each_mc_addr(ha, dev)
 611                 qeth_l2_add_mac(card, ha);
 612         netdev_for_each_uc_addr(ha, dev)
 613                 qeth_l2_add_mac(card, ha);
 614
 615         hash_for_each_safe(card->mac_htable, i, tmp, mac, hnode) {
 616                 switch (mac->disp_flag) {
 617                 case QETH_DISP_ADDR_DELETE:
 618                         qeth_l2_remove_mac(card, mac->mac_addr);
 619                         hash_del(&mac->hnode);
 620                         kfree(mac);
 621                         break;
 622                 case QETH_DISP_ADDR_ADD:
 623                         rc = qeth_l2_write_mac(card, mac->mac_addr);
 624                         if (rc) {
 625                                 hash_del(&mac->hnode);
 626                                 kfree(mac);
 627                                 break;
 628                         }
 629                         /* fall through */
 630                 default:
 631                         /* for next call to set_rx_mode(): */
 632                         mac->disp_flag = QETH_DISP_ADDR_DELETE;
 633                 }
 634         }
 635
 636         spin_unlock_bh(&card->mclock);
 637
 638         if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
 639                 qeth_setadp_promisc_mode(card);
 640         else
 641                 qeth_promisc_to_bridge(card);
 642 }
 643
 644 static int qeth_l2_xmit(struct qeth_card *card, struct sk_buff *skb,
 645                         struct qeth_qdio_out_q *queue, int cast_type, int ipv)
 646 {
 647         const unsigned int proto_len = IS_IQD(card) ? ETH_HLEN : 0;
 648         const unsigned int hw_hdr_len = sizeof(struct qeth_hdr);
 649         unsigned int frame_len = skb->len;
 650         unsigned int data_offset = 0;
 651         struct qeth_hdr *hdr = NULL;
 652         unsigned int hd_len = 0;
 653         unsigned int elements;
 654         int push_len, rc;
 655         bool is_sg;
 656
 657         rc = skb_cow_head(skb, hw_hdr_len);
 658         if (rc)
 659                 return rc;
 660
 661         push_len = qeth_add_hw_header(card, skb, &hdr, hw_hdr_len, proto_len,
 662                                       &elements);
 663         if (push_len < 0)
 664                 return push_len;
 665         if (!push_len) {
 666                 /* HW header needs its own buffer element. */
 667                 hd_len = hw_hdr_len + proto_len;
 668                 data_offset = proto_len;
 669         }
 670         qeth_l2_fill_header(hdr, skb, cast_type, frame_len);
 671         if (skb->ip_summed == CHECKSUM_PARTIAL) {
 672                 qeth_tx_csum(skb, &hdr->hdr.l2.flags[1], ipv);
 673                 if (card->options.performance_stats)
 674                         card->perf_stats.tx_csum++;
 675         }
 676
 677         is_sg = skb_is_nonlinear(skb);
 678         if (IS_IQD(card)) {
 679                 rc = qeth_do_send_packet_fast(queue, skb, hdr, data_offset,
 680                                               hd_len);
 681         } else {
 682                 /* TODO: drop skb_orphan() once TX completion is fast enough */
 683                 skb_orphan(skb);
 684                 rc = qeth_do_send_packet(card, queue, skb, hdr, data_offset,
 685                                          hd_len, elements);
 686         }
 687
 688         if (!rc) {
 689                 if (card->options.performance_stats) {
 690                         card->perf_stats.buf_elements_sent += elements;
 691                         if (is_sg)
 692                                 card->perf_stats.sg_skbs_sent++;
 693                 }
 694         } else {
 695                 if (!push_len)
 696                         kmem_cache_free(qeth_core_header_cache, hdr);
 697                 if (rc == -EBUSY)
 698                         /* roll back to ETH header */
 699                         skb_pull(skb, push_len);
 700         }
 701         return rc;
 702 }
 703
 704 static int qeth_l2_xmit_osn(struct qeth_card *card, struct sk_buff *skb,
 705                             struct qeth_qdio_out_q *queue)
 706 {
 707         unsigned int elements;
 708         struct qeth_hdr *hdr;
 709
 710         if (skb->protocol == htons(ETH_P_IPV6))
 711                 return -EPROTONOSUPPORT;
 712
 713         hdr = (struct qeth_hdr *)skb->data;
 714         elements = qeth_get_elements_no(card, skb, 0, 0);
 715         if (!elements)
 716                 return -E2BIG;
 717         if (qeth_hdr_chk_and_bounce(skb, &hdr, sizeof(*hdr)))
 718                 return -EINVAL;
 719         return qeth_do_send_packet(card, queue, skb, hdr, 0, 0, elements);
 720 }
 721
 722 static netdev_tx_t qeth_l2_hard_start_xmit(struct sk_buff *skb,
 723                                            struct net_device *dev)
 724 {
 725         struct qeth_card *card = dev->ml_priv;
 726         int cast_type = qeth_l2_get_cast_type(card, skb);
 727         int ipv = qeth_get_ip_version(skb);
 728         struct qeth_qdio_out_q *queue;
 729         int tx_bytes = skb->len;
 730         int rc;
 731
 732         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
 733                 card->stats.tx_carrier_errors++;
 734                 goto tx_drop;
 735         }
 736
 737         queue = qeth_get_tx_queue(card, skb, ipv, cast_type);
 738
 739         if (card->options.performance_stats) {
 740                 card->perf_stats.outbound_cnt++;
 741                 card->perf_stats.outbound_start_time = qeth_get_micros();
 742         }
 743         netif_stop_queue(dev);
 744
 745         if (IS_OSN(card))
 746                 rc = qeth_l2_xmit_osn(card, skb, queue);
 747         else
 748                 rc = qeth_l2_xmit(card, skb, queue, cast_type, ipv);
 749
 750         if (!rc) {
 751                 card->stats.tx_packets++;
 752                 card->stats.tx_bytes += tx_bytes;
 753                 if (card->options.performance_stats)
 754                         card->perf_stats.outbound_time += qeth_get_micros() -
 755                                 card->perf_stats.outbound_start_time;
 756                 netif_wake_queue(dev);
 757                 return NETDEV_TX_OK;
 758         } else if (rc == -EBUSY) {
 759                 return NETDEV_TX_BUSY;
 760         } /* else fall through */
 761
 762 tx_drop:
 763         card->stats.tx_dropped++;
 764         card->stats.tx_errors++;
 765         dev_kfree_skb_any(skb);
 766         netif_wake_queue(dev);
 767         return NETDEV_TX_OK;
 768 }
 769
 770 static int __qeth_l2_open(struct net_device *dev)
 771 {
 772         struct qeth_card *card = dev->ml_priv;
 773         int rc = 0;
 774
 775         QETH_CARD_TEXT(card, 4, "qethopen");
 776         if (card->state == CARD_STATE_UP)
 777                 return rc;
 778         if (card->state != CARD_STATE_SOFTSETUP)
 779                 return -ENODEV;
 780
 781         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
 782              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
 783                 QETH_CARD_TEXT(card, 4, "nomacadr");
 784                 return -EPERM;
 785         }
 786         card->data.state = CH_STATE_UP;
 787         card->state = CARD_STATE_UP;
 788         netif_start_queue(dev);
 789
 790         if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) {
 791                 napi_enable(&card->napi);
 792                 napi_schedule(&card->napi);
 793         } else
 794                 rc = -EIO;
 795         return rc;
 796 }
 797
 798 static int qeth_l2_open(struct net_device *dev)
 799 {
 800         struct qeth_card *card = dev->ml_priv;
 801
 802         QETH_CARD_TEXT(card, 5, "qethope_");
 803         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 804                 QETH_CARD_TEXT(card, 3, "openREC");
 805                 return -ERESTARTSYS;
 806         }
 807         return __qeth_l2_open(dev);
 808 }
 809
 810 static int qeth_l2_stop(struct net_device *dev)
 811 {
 812         struct qeth_card *card = dev->ml_priv;
 813
 814         QETH_CARD_TEXT(card, 4, "qethstop");
 815         netif_tx_disable(dev);
 816         if (card->state == CARD_STATE_UP) {
 817                 card->state = CARD_STATE_SOFTSETUP;
 818                 napi_disable(&card->napi);
 819         }
 820         return 0;
 821 }
 822
 823 static const struct device_type qeth_l2_devtype = {
 824         .name = "qeth_layer2",
 825         .groups = qeth_l2_attr_groups,
 826 };
 827
 828 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 829 {
 830         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 831         int rc;
 832
 833         if (gdev->dev.type == &qeth_generic_devtype) {
 834                 rc = qeth_l2_create_device_attributes(&gdev->dev);
 835                 if (rc)
 836                         return rc;
 837         }
 838         INIT_LIST_HEAD(&card->vid_list);
 839         hash_init(card->mac_htable);
 840         card->options.layer2 = 1;
 841         card->info.hwtrap = 0;
 842         qeth_l2_vnicc_set_defaults(card);
 843         return 0;
 844 }
 845
 846 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
 847 {
 848         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
 849
 850         if (cgdev->dev.type == &qeth_generic_devtype)
 851                 qeth_l2_remove_device_attributes(&cgdev->dev);
 852         qeth_set_allowed_threads(card, 0, 1);
 853         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 854
 855         if (cgdev->state == CCWGROUP_ONLINE)
 856                 qeth_l2_set_offline(cgdev);
 857         unregister_netdev(card->dev);
 858 }
 859
 860 static const struct ethtool_ops qeth_l2_ethtool_ops = {
 861         .get_link = ethtool_op_get_link,
 862         .get_strings = qeth_core_get_strings,
 863         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 864         .get_sset_count = qeth_core_get_sset_count,
 865         .get_drvinfo = qeth_core_get_drvinfo,
 866         .get_link_ksettings = qeth_core_ethtool_get_link_ksettings,
 867 };
 868
 869 static const struct ethtool_ops qeth_l2_osn_ops = {
 870         .get_strings = qeth_core_get_strings,
 871         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 872         .get_sset_count = qeth_core_get_sset_count,
 873         .get_drvinfo = qeth_core_get_drvinfo,
 874 };
 875
 876 static const struct net_device_ops qeth_l2_netdev_ops = {
 877         .ndo_open               = qeth_l2_open,
 878         .ndo_stop               = qeth_l2_stop,
 879         .ndo_get_stats          = qeth_get_stats,
 880         .ndo_start_xmit         = qeth_l2_hard_start_xmit,
 881         .ndo_features_check     = qeth_features_check,
 882         .ndo_validate_addr      = eth_validate_addr,
 883         .ndo_set_rx_mode        = qeth_l2_set_rx_mode,
 884         .ndo_do_ioctl           = qeth_do_ioctl,
 885         .ndo_set_mac_address    = qeth_l2_set_mac_address,
 886         .ndo_vlan_rx_add_vid    = qeth_l2_vlan_rx_add_vid,
 887         .ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,
 888         .ndo_tx_timeout         = qeth_tx_timeout,
 889         .ndo_fix_features       = qeth_fix_features,
 890         .ndo_set_features       = qeth_set_features
 891 };
 892
 893 static int qeth_l2_setup_netdev(struct qeth_card *card)
 894 {
 895         int rc;
 896
 897         if (card->dev->netdev_ops)
 898                 return 0;
 899
 900         card->dev->priv_flags |= IFF_UNICAST_FLT;
 901         card->dev->netdev_ops = &qeth_l2_netdev_ops;
 902         if (card->info.type == QETH_CARD_TYPE_OSN) {
 903                 card->dev->ethtool_ops = &qeth_l2_osn_ops;
 904                 card->dev->flags |= IFF_NOARP;
 905         } else {
 906                 card->dev->ethtool_ops = &qeth_l2_ethtool_ops;
 907                 card->dev->needed_headroom = sizeof(struct qeth_hdr);
 908         }
 909
 910         if (card->info.type == QETH_CARD_TYPE_OSM)
 911                 card->dev->features |= NETIF_F_VLAN_CHALLENGED;
 912         else
 913                 card->dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
 914
 915         if (card->info.type == QETH_CARD_TYPE_OSD && !card->info.guestlan) {
 916                 card->dev->features |= NETIF_F_SG;
 917                 /* OSA 3S and earlier has no RX/TX support */
 918                 if (qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM)) {
 919                         card->dev->hw_features |= NETIF_F_IP_CSUM;
 920                         card->dev->vlan_features |= NETIF_F_IP_CSUM;
 921                 }
 922         }
 923         if (qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) {
 924                 card->dev->hw_features |= NETIF_F_IPV6_CSUM;
 925                 card->dev->vlan_features |= NETIF_F_IPV6_CSUM;
 926         }
 927         if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM) ||
 928             qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6)) {
 929                 card->dev->hw_features |= NETIF_F_RXCSUM;
 930                 card->dev->vlan_features |= NETIF_F_RXCSUM;
 931         }
 932
 933         qeth_l2_request_initial_mac(card);
 934         netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT);
 935         rc = register_netdev(card->dev);
 936         if (rc)
 937                 card->dev->netdev_ops = NULL;
 938         return rc;
 939 }
 940
 941 static int qeth_l2_start_ipassists(struct qeth_card *card)
 942 {
 943         /* configure isolation level */
 944         if (qeth_set_access_ctrl_online(card, 0))
 945                 return -ENODEV;
 946         return 0;
 947 }
 948
 949 static void qeth_l2_trace_features(struct qeth_card *card)
 950 {
 951         /* Set BridgePort features */
 952         QETH_CARD_TEXT(card, 2, "featuSBP");
 953         QETH_CARD_HEX(card, 2, &card->options.sbp.supported_funcs,
 954                       sizeof(card->options.sbp.supported_funcs));
 955         /* VNIC Characteristics features */
 956         QETH_CARD_TEXT(card, 2, "feaVNICC");
 957         QETH_CARD_HEX(card, 2, &card->options.vnicc.sup_chars,
 958                       sizeof(card->options.vnicc.sup_chars));
 959 }
 960
 961 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 962 {
 963         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 964         int rc = 0;
 965         enum qeth_card_states recover_flag;
 966
 967         mutex_lock(&card->discipline_mutex);
 968         mutex_lock(&card->conf_mutex);
 969         QETH_DBF_TEXT(SETUP, 2, "setonlin");
 970         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 971
 972         recover_flag = card->state;
 973         rc = qeth_core_hardsetup_card(card);
 974         if (rc) {
 975                 QETH_DBF_TEXT_(SETUP, 2, "2err%04x", rc);
 976                 rc = -ENODEV;
 977                 goto out_remove;
 978         }
 979         qeth_bridgeport_query_support(card);
 980         if (card->options.sbp.supported_funcs)
 981                 dev_info(&card->gdev->dev,
 982                 "The device represents a Bridge Capable Port\n");
 983
 984         rc = qeth_l2_setup_netdev(card);
 985         if (rc)
 986                 goto out_remove;
 987
 988         if (card->info.type != QETH_CARD_TYPE_OSN &&
 989             !qeth_l2_send_setmac(card, card->dev->dev_addr))
 990                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 991
 992         if (qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP)) {
 993                 if (card->info.hwtrap &&
 994                     qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM))
 995                         card->info.hwtrap = 0;
 996         } else
 997                 card->info.hwtrap = 0;
 998
 999         /* for the rx_bcast characteristic, init VNICC after setmac */
1000         qeth_l2_vnicc_init(card);
1001
1002         qeth_trace_features(card);
1003         qeth_l2_trace_features(card);
1004
1005         qeth_l2_setup_bridgeport_attrs(card);
1006
1007         card->state = CARD_STATE_HARDSETUP;
1008         qeth_print_status_message(card);
1009
1010         /* softsetup */
1011         QETH_DBF_TEXT(SETUP, 2, "softsetp");
1012
1013         if ((card->info.type == QETH_CARD_TYPE_OSD) ||
1014             (card->info.type == QETH_CARD_TYPE_OSX)) {
1015                 rc = qeth_l2_start_ipassists(card);
1016                 if (rc)
1017                         goto out_remove;
1018         }
1019
1020         if (card->info.type != QETH_CARD_TYPE_OSN)
1021                 qeth_l2_process_vlans(card);
1022
1023         netif_tx_disable(card->dev);
1024
1025         rc = qeth_init_qdio_queues(card);
1026         if (rc) {
1027                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1028                 rc = -ENODEV;
1029                 goto out_remove;
1030         }
1031         card->state = CARD_STATE_SOFTSETUP;
1032         if (card->lan_online)
1033                 netif_carrier_on(card->dev);
1034         else
1035                 netif_carrier_off(card->dev);
1036
1037         qeth_set_allowed_threads(card, 0xffffffff, 0);
1038
1039         qeth_enable_hw_features(card->dev);
1040         if (recover_flag == CARD_STATE_RECOVER) {
1041                 if (recovery_mode &&
1042                     card->info.type != QETH_CARD_TYPE_OSN) {
1043                         __qeth_l2_open(card->dev);
1044                         qeth_l2_set_rx_mode(card->dev);
1045                 } else {
1046                         rtnl_lock();
1047                         dev_open(card->dev);
1048                         rtnl_unlock();
1049                 }
1050         }
1051         /* let user_space know that device is online */
1052         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1053         mutex_unlock(&card->conf_mutex);
1054         mutex_unlock(&card->discipline_mutex);
1055         return 0;
1056
1057 out_remove:
1058         qeth_l2_stop_card(card, 0);
1059         ccw_device_set_offline(CARD_DDEV(card));
1060         ccw_device_set_offline(CARD_WDEV(card));
1061         ccw_device_set_offline(CARD_RDEV(card));
1062         qdio_free(CARD_DDEV(card));
1063         if (recover_flag == CARD_STATE_RECOVER)
1064                 card->state = CARD_STATE_RECOVER;
1065         else
1066                 card->state = CARD_STATE_DOWN;
1067         mutex_unlock(&card->conf_mutex);
1068         mutex_unlock(&card->discipline_mutex);
1069         return rc;
1070 }
1071
1072 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1073 {
1074         return __qeth_l2_set_online(gdev, 0);
1075 }
1076
1077 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1078                                         int recovery_mode)
1079 {
1080         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1081         int rc = 0, rc2 = 0, rc3 = 0;
1082         enum qeth_card_states recover_flag;
1083
1084         mutex_lock(&card->discipline_mutex);
1085         mutex_lock(&card->conf_mutex);
1086         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1087         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1088
1089         netif_carrier_off(card->dev);
1090         recover_flag = card->state;
1091         if ((!recovery_mode && card->info.hwtrap) || card->info.hwtrap == 2) {
1092                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1093                 card->info.hwtrap = 1;
1094         }
1095         qeth_l2_stop_card(card, recovery_mode);
1096         rc  = ccw_device_set_offline(CARD_DDEV(card));
1097         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1098         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1099         if (!rc)
1100                 rc = (rc2) ? rc2 : rc3;
1101         if (rc)
1102                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1103         qdio_free(CARD_DDEV(card));
1104         if (recover_flag == CARD_STATE_UP)
1105                 card->state = CARD_STATE_RECOVER;
1106         /* let user_space know that device is offline */
1107         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1108         mutex_unlock(&card->conf_mutex);
1109         mutex_unlock(&card->discipline_mutex);
1110         return 0;
1111 }
1112
1113 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1114 {
1115         return __qeth_l2_set_offline(cgdev, 0);
1116 }
1117
1118 static int qeth_l2_recover(void *ptr)
1119 {
1120         struct qeth_card *card;
1121         int rc = 0;
1122
1123         card = (struct qeth_card *) ptr;
1124         QETH_CARD_TEXT(card, 2, "recover1");
1125         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1126                 return 0;
1127         QETH_CARD_TEXT(card, 2, "recover2");
1128         dev_warn(&card->gdev->dev,
1129                 "A recovery process has been started for the device\n");
1130         qeth_set_recovery_task(card);
1131         __qeth_l2_set_offline(card->gdev, 1);
1132         rc = __qeth_l2_set_online(card->gdev, 1);
1133         if (!rc)
1134                 dev_info(&card->gdev->dev,
1135                         "Device successfully recovered!\n");
1136         else {
1137                 qeth_close_dev(card);
1138                 dev_warn(&card->gdev->dev, "The qeth device driver "
1139                                 "failed to recover an error on the device\n");
1140         }
1141         qeth_clear_recovery_task(card);
1142         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1143         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1144         return 0;
1145 }
1146
1147 static int __init qeth_l2_init(void)
1148 {
1149         pr_info("register layer 2 discipline\n");
1150         return 0;
1151 }
1152
1153 static void __exit qeth_l2_exit(void)
1154 {
1155         pr_info("unregister layer 2 discipline\n");
1156 }
1157
1158 static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev)
1159 {
1160         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1161
1162         netif_device_detach(card->dev);
1163         qeth_set_allowed_threads(card, 0, 1);
1164         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1165         if (gdev->state == CCWGROUP_OFFLINE)
1166                 return 0;
1167         if (card->state == CARD_STATE_UP) {
1168                 if (card->info.hwtrap)
1169                         qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1170                 __qeth_l2_set_offline(card->gdev, 1);
1171         } else
1172                 __qeth_l2_set_offline(card->gdev, 0);
1173         return 0;
1174 }
1175
1176 static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
1177 {
1178         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1179         int rc = 0;
1180
1181         if (gdev->state == CCWGROUP_OFFLINE)
1182                 goto out;
1183
1184         if (card->state == CARD_STATE_RECOVER) {
1185                 rc = __qeth_l2_set_online(card->gdev, 1);
1186                 if (rc) {
1187                         rtnl_lock();
1188                         dev_close(card->dev);
1189                         rtnl_unlock();
1190                 }
1191         } else
1192                 rc = __qeth_l2_set_online(card->gdev, 0);
1193 out:
1194         qeth_set_allowed_threads(card, 0xffffffff, 0);
1195         netif_device_attach(card->dev);
1196         if (rc)
1197                 dev_warn(&card->gdev->dev, "The qeth device driver "
1198                         "failed to recover an error on the device\n");
1199         return rc;
1200 }
1201
1202 /* Returns zero if the command is successfully "consumed" */
1203 static int qeth_l2_control_event(struct qeth_card *card,
1204                                         struct qeth_ipa_cmd *cmd)
1205 {
1206         switch (cmd->hdr.command) {
1207         case IPA_CMD_SETBRIDGEPORT_OSA:
1208         case IPA_CMD_SETBRIDGEPORT_IQD:
1209                 if (cmd->data.sbp.hdr.command_code ==
1210                                 IPA_SBP_BRIDGE_PORT_STATE_CHANGE) {
1211                         qeth_bridge_state_change(card, cmd);
1212                         return 0;
1213                 } else
1214                         return 1;
1215         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
1216                 qeth_bridge_host_event(card, cmd);
1217                 return 0;
1218         default:
1219                 return 1;
1220         }
1221 }
1222
1223 struct qeth_discipline qeth_l2_discipline = {
1224         .devtype = &qeth_l2_devtype,
1225         .process_rx_buffer = qeth_l2_process_inbound_buffer,
1226         .recover = qeth_l2_recover,
1227         .setup = qeth_l2_probe_device,
1228         .remove = qeth_l2_remove_device,
1229         .set_online = qeth_l2_set_online,
1230         .set_offline = qeth_l2_set_offline,
1231         .freeze = qeth_l2_pm_suspend,
1232         .thaw = qeth_l2_pm_resume,
1233         .restore = qeth_l2_pm_resume,
1234         .do_ioctl = NULL,
1235         .control_event_handler = qeth_l2_control_event,
1236 };
1237 EXPORT_SYMBOL_GPL(qeth_l2_discipline);
1238
1239 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1240                            struct qeth_cmd_buffer *iob)
1241 {
1242         struct qeth_channel *channel = iob->channel;
1243         unsigned long flags;
1244         int rc = 0;
1245
1246         QETH_CARD_TEXT(card, 5, "osndctrd");
1247
1248         wait_event(card->wait_q,
1249                    atomic_cmpxchg(&channel->irq_pending, 0, 1) == 0);
1250         qeth_prepare_control_data(card, len, iob);
1251         QETH_CARD_TEXT(card, 6, "osnoirqp");
1252         spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
1253         rc = ccw_device_start_timeout(channel->ccwdev, channel->ccw,
1254                                       (addr_t) iob, 0, 0, QETH_IPA_TIMEOUT);
1255         spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags);
1256         if (rc) {
1257                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1258                            "ccw_device_start rc = %i\n", rc);
1259                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1260                 qeth_release_buffer(channel, iob);
1261                 atomic_set(&channel->irq_pending, 0);
1262                 wake_up(&card->wait_q);
1263         }
1264         return rc;
1265 }
1266
1267 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1268                         struct qeth_cmd_buffer *iob, int data_len)
1269 {
1270         u16 s1, s2;
1271
1272         QETH_CARD_TEXT(card, 4, "osndipa");
1273
1274         qeth_prepare_ipa_cmd(card, iob);
1275         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1276         s2 = (u16)data_len;
1277         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1278         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1279         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1280         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1281         return qeth_osn_send_control_data(card, s1, iob);
1282 }
1283
1284 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1285 {
1286         struct qeth_cmd_buffer *iob;
1287         struct qeth_card *card;
1288
1289         if (!dev)
1290                 return -ENODEV;
1291         card = dev->ml_priv;
1292         if (!card)
1293                 return -ENODEV;
1294         QETH_CARD_TEXT(card, 2, "osnsdmc");
1295         if (!qeth_card_hw_is_reachable(card))
1296                 return -ENODEV;
1297         iob = qeth_wait_for_buffer(&card->write);
1298         memcpy(__ipa_cmd(iob), data, data_len);
1299         return qeth_osn_send_ipa_cmd(card, iob, data_len);
1300 }
1301 EXPORT_SYMBOL(qeth_osn_assist);
1302
1303 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1304                   int (*assist_cb)(struct net_device *, void *),
1305                   int (*data_cb)(struct sk_buff *))
1306 {
1307         struct qeth_card *card;
1308
1309         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1310         if (*dev == NULL)
1311                 return -ENODEV;
1312         card = (*dev)->ml_priv;
1313         if (!card)
1314                 return -ENODEV;
1315         QETH_CARD_TEXT(card, 2, "osnreg");
1316         if ((assist_cb == NULL) || (data_cb == NULL))
1317                 return -EINVAL;
1318         card->osn_info.assist_cb = assist_cb;
1319         card->osn_info.data_cb = data_cb;
1320         return 0;
1321 }
1322 EXPORT_SYMBOL(qeth_osn_register);
1323
1324 void qeth_osn_deregister(struct net_device *dev)
1325 {
1326         struct qeth_card *card;
1327
1328         if (!dev)
1329                 return;
1330         card = dev->ml_priv;
1331         if (!card)
1332                 return;
1333         QETH_CARD_TEXT(card, 2, "osndereg");
1334         card->osn_info.assist_cb = NULL;
1335         card->osn_info.data_cb = NULL;
1336         return;
1337 }
1338 EXPORT_SYMBOL(qeth_osn_deregister);
1339
1340 /* SETBRIDGEPORT support, async notifications */
1341
1342 enum qeth_an_event_type {anev_reg_unreg, anev_abort, anev_reset};
1343
1344 /**
1345  * qeth_bridge_emit_host_event() - bridgeport address change notification
1346  * @card:  qeth_card structure pointer, for udev events.
1347  * @evtype:  "normal" register/unregister, or abort, or reset. For abort
1348  *            and reset token and addr_lnid are unused and may be NULL.
1349  * @code:  event bitmask: high order bit 0x80 value 1 means removal of an
1350  *                        object, 0 - addition of an object.
1351  *                        0x01 - VLAN, 0x02 - MAC, 0x03 - VLAN and MAC.
1352  * @token: "network token" structure identifying physical address of the port.
1353  * @addr_lnid: pointer to structure with MAC address and VLAN ID.
1354  *
1355  * This function is called when registrations and deregistrations are
1356  * reported by the hardware, and also when notifications are enabled -
1357  * for all currently registered addresses.
1358  */
1359 static void qeth_bridge_emit_host_event(struct qeth_card *card,
1360         enum qeth_an_event_type evtype,
1361         u8 code, struct net_if_token *token, struct mac_addr_lnid *addr_lnid)
1362 {
1363         char str[7][32];
1364         char *env[8];
1365         int i = 0;
1366
1367         switch (evtype) {
1368         case anev_reg_unreg:
1369                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=%s",
1370                                 (code & IPA_ADDR_CHANGE_CODE_REMOVAL)
1371                                 ? "deregister" : "register");
1372                 env[i] = str[i]; i++;
1373                 if (code & IPA_ADDR_CHANGE_CODE_VLANID) {
1374                         snprintf(str[i], sizeof(str[i]), "VLAN=%d",
1375                                 addr_lnid->lnid);
1376                         env[i] = str[i]; i++;
1377                 }
1378                 if (code & IPA_ADDR_CHANGE_CODE_MACADDR) {
1379                         snprintf(str[i], sizeof(str[i]), "MAC=%pM",
1380                                 addr_lnid->mac);
1381                         env[i] = str[i]; i++;
1382                 }
1383                 snprintf(str[i], sizeof(str[i]), "NTOK_BUSID=%x.%x.%04x",
1384                         token->cssid, token->ssid, token->devnum);
1385                 env[i] = str[i]; i++;
1386                 snprintf(str[i], sizeof(str[i]), "NTOK_IID=%02x", token->iid);
1387                 env[i] = str[i]; i++;
1388                 snprintf(str[i], sizeof(str[i]), "NTOK_CHPID=%02x",
1389                                 token->chpid);
1390                 env[i] = str[i]; i++;
1391                 snprintf(str[i], sizeof(str[i]), "NTOK_CHID=%04x", token->chid);
1392                 env[i] = str[i]; i++;
1393                 break;
1394         case anev_abort:
1395                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=abort");
1396                 env[i] = str[i]; i++;
1397                 break;
1398         case anev_reset:
1399                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=reset");
1400                 env[i] = str[i]; i++;
1401                 break;
1402         }
1403         env[i] = NULL;
1404         kobject_uevent_env(&card->gdev->dev.kobj, KOBJ_CHANGE, env);
1405 }
1406
1407 struct qeth_bridge_state_data {
1408         struct work_struct worker;
1409         struct qeth_card *card;
1410         struct qeth_sbp_state_change qports;
1411 };
1412
1413 static void qeth_bridge_state_change_worker(struct work_struct *work)
1414 {
1415         struct qeth_bridge_state_data *data =
1416                 container_of(work, struct qeth_bridge_state_data, worker);
1417         /* We are only interested in the first entry - local port */
1418         struct qeth_sbp_port_entry *entry = &data->qports.entry[0];
1419         char env_locrem[32];
1420         char env_role[32];
1421         char env_state[32];
1422         char *env[] = {
1423                 env_locrem,
1424                 env_role,
1425                 env_state,
1426                 NULL
1427         };
1428
1429         /* Role should not change by itself, but if it did, */
1430         /* information from the hardware is authoritative.  */
1431         mutex_lock(&data->card->conf_mutex);
1432         data->card->options.sbp.role = entry->role;
1433         mutex_unlock(&data->card->conf_mutex);
1434
1435         snprintf(env_locrem, sizeof(env_locrem), "BRIDGEPORT=statechange");
1436         snprintf(env_role, sizeof(env_role), "ROLE=%s",
1437                 (entry->role == QETH_SBP_ROLE_NONE) ? "none" :
1438                 (entry->role == QETH_SBP_ROLE_PRIMARY) ? "primary" :
1439                 (entry->role == QETH_SBP_ROLE_SECONDARY) ? "secondary" :
1440                 "<INVALID>");
1441         snprintf(env_state, sizeof(env_state), "STATE=%s",
1442                 (entry->state == QETH_SBP_STATE_INACTIVE) ? "inactive" :
1443                 (entry->state == QETH_SBP_STATE_STANDBY) ? "standby" :
1444                 (entry->state == QETH_SBP_STATE_ACTIVE) ? "active" :
1445                 "<INVALID>");
1446         kobject_uevent_env(&data->card->gdev->dev.kobj,
1447                                 KOBJ_CHANGE, env);
1448         kfree(data);
1449 }
1450
1451 static void qeth_bridge_state_change(struct qeth_card *card,
1452                                         struct qeth_ipa_cmd *cmd)
1453 {
1454         struct qeth_sbp_state_change *qports =
1455                  &cmd->data.sbp.data.state_change;
1456         struct qeth_bridge_state_data *data;
1457         int extrasize;
1458
1459         QETH_CARD_TEXT(card, 2, "brstchng");
1460         if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1461                 QETH_CARD_TEXT_(card, 2, "BPsz%04x", qports->entry_length);
1462                 return;
1463         }
1464         extrasize = sizeof(struct qeth_sbp_port_entry) * qports->num_entries;
1465         data = kzalloc(sizeof(struct qeth_bridge_state_data) + extrasize,
1466                 GFP_ATOMIC);
1467         if (!data) {
1468                 QETH_CARD_TEXT(card, 2, "BPSalloc");
1469                 return;
1470         }
1471         INIT_WORK(&data->worker, qeth_bridge_state_change_worker);
1472         data->card = card;
1473         memcpy(&data->qports, qports,
1474                         sizeof(struct qeth_sbp_state_change) + extrasize);
1475         queue_work(qeth_wq, &data->worker);
1476 }
1477
1478 struct qeth_bridge_host_data {
1479         struct work_struct worker;
1480         struct qeth_card *card;
1481         struct qeth_ipacmd_addr_change hostevs;
1482 };
1483
1484 static void qeth_bridge_host_event_worker(struct work_struct *work)
1485 {
1486         struct qeth_bridge_host_data *data =
1487                 container_of(work, struct qeth_bridge_host_data, worker);
1488         int i;
1489
1490         if (data->hostevs.lost_event_mask) {
1491                 dev_info(&data->card->gdev->dev,
1492 "Address notification from the Bridge Port stopped %s (%s)\n",
1493                         data->card->dev->name,
1494                         (data->hostevs.lost_event_mask == 0x01)
1495                         ? "Overflow"
1496                         : (data->hostevs.lost_event_mask == 0x02)
1497                         ? "Bridge port state change"
1498                         : "Unknown reason");
1499                 mutex_lock(&data->card->conf_mutex);
1500                 data->card->options.sbp.hostnotification = 0;
1501                 mutex_unlock(&data->card->conf_mutex);
1502                 qeth_bridge_emit_host_event(data->card, anev_abort,
1503                         0, NULL, NULL);
1504         } else
1505                 for (i = 0; i < data->hostevs.num_entries; i++) {
1506                         struct qeth_ipacmd_addr_change_entry *entry =
1507                                         &data->hostevs.entry[i];
1508                         qeth_bridge_emit_host_event(data->card,
1509                                         anev_reg_unreg,
1510                                         entry->change_code,
1511                                         &entry->token, &entry->addr_lnid);
1512                 }
1513         kfree(data);
1514 }
1515
1516 static void qeth_bridge_host_event(struct qeth_card *card,
1517                                         struct qeth_ipa_cmd *cmd)
1518 {
1519         struct qeth_ipacmd_addr_change *hostevs =
1520                  &cmd->data.addrchange;
1521         struct qeth_bridge_host_data *data;
1522         int extrasize;
1523
1524         QETH_CARD_TEXT(card, 2, "brhostev");
1525         if (cmd->hdr.return_code != 0x0000) {
1526                 if (cmd->hdr.return_code == 0x0010) {
1527                         if (hostevs->lost_event_mask == 0x00)
1528                                 hostevs->lost_event_mask = 0xff;
1529                 } else {
1530                         QETH_CARD_TEXT_(card, 2, "BPHe%04x",
1531                                 cmd->hdr.return_code);
1532                         return;
1533                 }
1534         }
1535         extrasize = sizeof(struct qeth_ipacmd_addr_change_entry) *
1536                                                 hostevs->num_entries;
1537         data = kzalloc(sizeof(struct qeth_bridge_host_data) + extrasize,
1538                 GFP_ATOMIC);
1539         if (!data) {
1540                 QETH_CARD_TEXT(card, 2, "BPHalloc");
1541                 return;
1542         }
1543         INIT_WORK(&data->worker, qeth_bridge_host_event_worker);
1544         data->card = card;
1545         memcpy(&data->hostevs, hostevs,
1546                         sizeof(struct qeth_ipacmd_addr_change) + extrasize);
1547         queue_work(qeth_wq, &data->worker);
1548 }
1549
1550 /* SETBRIDGEPORT support; sending commands */
1551
1552 struct _qeth_sbp_cbctl {
1553         u16 ipa_rc;
1554         u16 cmd_rc;
1555         union {
1556                 u32 supported;
1557                 struct {
1558                         enum qeth_sbp_roles *role;
1559                         enum qeth_sbp_states *state;
1560                 } qports;
1561         } data;
1562 };
1563
1564 /**
1565  * qeth_bridgeport_makerc() - derive "traditional" error from hardware codes.
1566  * @card:                     qeth_card structure pointer, for debug messages.
1567  * @cbctl:                    state structure with hardware return codes.
1568  * @setcmd:                   IPA command code
1569  *
1570  * Returns negative errno-compatible error indication or 0 on success.
1571  */
1572 static int qeth_bridgeport_makerc(struct qeth_card *card,
1573         struct _qeth_sbp_cbctl *cbctl, enum qeth_ipa_sbp_cmd setcmd)
1574 {
1575         int rc;
1576         int is_iqd = (card->info.type == QETH_CARD_TYPE_IQD);
1577
1578         if ((is_iqd && (cbctl->ipa_rc == IPA_RC_SUCCESS)) ||
1579             (!is_iqd && (cbctl->ipa_rc == cbctl->cmd_rc)))
1580                 switch (cbctl->cmd_rc) {
1581                 case IPA_RC_SUCCESS:
1582                         rc = 0;
1583                         break;
1584                 case IPA_RC_L2_UNSUPPORTED_CMD:
1585                 case IPA_RC_UNSUPPORTED_COMMAND:
1586                         rc = -EOPNOTSUPP;
1587                         break;
1588                 case IPA_RC_SBP_OSA_NOT_CONFIGURED:
1589                 case IPA_RC_SBP_IQD_NOT_CONFIGURED:
1590                         rc = -ENODEV; /* maybe not the best code here? */
1591                         dev_err(&card->gdev->dev,
1592         "The device is not configured as a Bridge Port\n");
1593                         break;
1594                 case IPA_RC_SBP_OSA_OS_MISMATCH:
1595                 case IPA_RC_SBP_IQD_OS_MISMATCH:
1596                         rc = -EPERM;
1597                         dev_err(&card->gdev->dev,
1598         "A Bridge Port is already configured by a different operating system\n");
1599                         break;
1600                 case IPA_RC_SBP_OSA_ANO_DEV_PRIMARY:
1601                 case IPA_RC_SBP_IQD_ANO_DEV_PRIMARY:
1602                         switch (setcmd) {
1603                         case IPA_SBP_SET_PRIMARY_BRIDGE_PORT:
1604                                 rc = -EEXIST;
1605                                 dev_err(&card->gdev->dev,
1606         "The LAN already has a primary Bridge Port\n");
1607                                 break;
1608                         case IPA_SBP_SET_SECONDARY_BRIDGE_PORT:
1609                                 rc = -EBUSY;
1610                                 dev_err(&card->gdev->dev,
1611         "The device is already a primary Bridge Port\n");
1612                                 break;
1613                         default:
1614                                 rc = -EIO;
1615                         }
1616                         break;
1617                 case IPA_RC_SBP_OSA_CURRENT_SECOND:
1618                 case IPA_RC_SBP_IQD_CURRENT_SECOND:
1619                         rc = -EBUSY;
1620                         dev_err(&card->gdev->dev,
1621         "The device is already a secondary Bridge Port\n");
1622                         break;
1623                 case IPA_RC_SBP_OSA_LIMIT_SECOND:
1624                 case IPA_RC_SBP_IQD_LIMIT_SECOND:
1625                         rc = -EEXIST;
1626                         dev_err(&card->gdev->dev,
1627         "The LAN cannot have more secondary Bridge Ports\n");
1628                         break;
1629                 case IPA_RC_SBP_OSA_CURRENT_PRIMARY:
1630                 case IPA_RC_SBP_IQD_CURRENT_PRIMARY:
1631                         rc = -EBUSY;
1632                         dev_err(&card->gdev->dev,
1633         "The device is already a primary Bridge Port\n");
1634                         break;
1635                 case IPA_RC_SBP_OSA_NOT_AUTHD_BY_ZMAN:
1636                 case IPA_RC_SBP_IQD_NOT_AUTHD_BY_ZMAN:
1637                         rc = -EACCES;
1638                         dev_err(&card->gdev->dev,
1639         "The device is not authorized to be a Bridge Port\n");
1640                         break;
1641                 default:
1642                         rc = -EIO;
1643                 }
1644         else
1645                 switch (cbctl->ipa_rc) {
1646                 case IPA_RC_NOTSUPP:
1647                         rc = -EOPNOTSUPP;
1648                         break;
1649                 case IPA_RC_UNSUPPORTED_COMMAND:
1650                         rc = -EOPNOTSUPP;
1651                         break;
1652                 default:
1653                         rc = -EIO;
1654                 }
1655
1656         if (rc) {
1657                 QETH_CARD_TEXT_(card, 2, "SBPi%04x", cbctl->ipa_rc);
1658                 QETH_CARD_TEXT_(card, 2, "SBPc%04x", cbctl->cmd_rc);
1659         }
1660         return rc;
1661 }
1662
1663 static struct qeth_cmd_buffer *qeth_sbp_build_cmd(struct qeth_card *card,
1664                                                   enum qeth_ipa_sbp_cmd sbp_cmd,
1665                                                   unsigned int cmd_length)
1666 {
1667         enum qeth_ipa_cmds ipa_cmd = (card->info.type == QETH_CARD_TYPE_IQD) ?
1668                                         IPA_CMD_SETBRIDGEPORT_IQD :
1669                                         IPA_CMD_SETBRIDGEPORT_OSA;
1670         struct qeth_cmd_buffer *iob;
1671         struct qeth_ipa_cmd *cmd;
1672
1673         iob = qeth_get_ipacmd_buffer(card, ipa_cmd, 0);
1674         if (!iob)
1675                 return iob;
1676         cmd = __ipa_cmd(iob);
1677         cmd->data.sbp.hdr.cmdlength = sizeof(struct qeth_ipacmd_sbp_hdr) +
1678                                       cmd_length;
1679         cmd->data.sbp.hdr.command_code = sbp_cmd;
1680         cmd->data.sbp.hdr.used_total = 1;
1681         cmd->data.sbp.hdr.seq_no = 1;
1682         return iob;
1683 }
1684
1685 static int qeth_bridgeport_query_support_cb(struct qeth_card *card,
1686         struct qeth_reply *reply, unsigned long data)
1687 {
1688         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1689         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1690         QETH_CARD_TEXT(card, 2, "brqsupcb");
1691         cbctl->ipa_rc = cmd->hdr.return_code;
1692         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1693         if ((cbctl->ipa_rc == 0) && (cbctl->cmd_rc == 0)) {
1694                 cbctl->data.supported =
1695                         cmd->data.sbp.data.query_cmds_supp.supported_cmds;
1696         } else {
1697                 cbctl->data.supported = 0;
1698         }
1699         return 0;
1700 }
1701
1702 /**
1703  * qeth_bridgeport_query_support() - store bitmask of supported subfunctions.
1704  * @card:                            qeth_card structure pointer.
1705  *
1706  * Sets bitmask of supported setbridgeport subfunctions in the qeth_card
1707  * strucutre: card->options.sbp.supported_funcs.
1708  */
1709 static void qeth_bridgeport_query_support(struct qeth_card *card)
1710 {
1711         struct qeth_cmd_buffer *iob;
1712         struct _qeth_sbp_cbctl cbctl;
1713
1714         QETH_CARD_TEXT(card, 2, "brqsuppo");
1715         iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_COMMANDS_SUPPORTED,
1716                                  sizeof(struct qeth_sbp_query_cmds_supp));
1717         if (!iob)
1718                 return;
1719         if (qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_support_cb,
1720                                                         (void *)&cbctl) ||
1721             qeth_bridgeport_makerc(card, &cbctl,
1722                                         IPA_SBP_QUERY_COMMANDS_SUPPORTED)) {
1723                 /* non-zero makerc signifies failure, and produce messages */
1724                 card->options.sbp.role = QETH_SBP_ROLE_NONE;
1725                 return;
1726         }
1727         card->options.sbp.supported_funcs = cbctl.data.supported;
1728 }
1729
1730 static int qeth_bridgeport_query_ports_cb(struct qeth_card *card,
1731         struct qeth_reply *reply, unsigned long data)
1732 {
1733         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1734         struct qeth_sbp_query_ports *qports = &cmd->data.sbp.data.query_ports;
1735         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1736
1737         QETH_CARD_TEXT(card, 2, "brqprtcb");
1738         cbctl->ipa_rc = cmd->hdr.return_code;
1739         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1740         if ((cbctl->ipa_rc != 0) || (cbctl->cmd_rc != 0))
1741                 return 0;
1742         if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1743                 cbctl->cmd_rc = 0xffff;
1744                 QETH_CARD_TEXT_(card, 2, "SBPs%04x", qports->entry_length);
1745                 return 0;
1746         }
1747         /* first entry contains the state of the local port */
1748         if (qports->num_entries > 0) {
1749                 if (cbctl->data.qports.role)
1750                         *cbctl->data.qports.role = qports->entry[0].role;
1751                 if (cbctl->data.qports.state)
1752                         *cbctl->data.qports.state = qports->entry[0].state;
1753         }
1754         return 0;
1755 }
1756
1757 /**
1758  * qeth_bridgeport_query_ports() - query local bridgeport status.
1759  * @card:                          qeth_card structure pointer.
1760  * @role:   Role of the port: 0-none, 1-primary, 2-secondary.
1761  * @state:  State of the port: 0-inactive, 1-standby, 2-active.
1762  *
1763  * Returns negative errno-compatible error indication or 0 on success.
1764  *
1765  * 'role' and 'state' are not updated in case of hardware operation failure.
1766  */
1767 int qeth_bridgeport_query_ports(struct qeth_card *card,
1768         enum qeth_sbp_roles *role, enum qeth_sbp_states *state)
1769 {
1770         int rc = 0;
1771         struct qeth_cmd_buffer *iob;
1772         struct _qeth_sbp_cbctl cbctl = {
1773                 .data = {
1774                         .qports = {
1775                                 .role = role,
1776                                 .state = state,
1777                         },
1778                 },
1779         };
1780
1781         QETH_CARD_TEXT(card, 2, "brqports");
1782         if (!(card->options.sbp.supported_funcs & IPA_SBP_QUERY_BRIDGE_PORTS))
1783                 return -EOPNOTSUPP;
1784         iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_BRIDGE_PORTS, 0);
1785         if (!iob)
1786                 return -ENOMEM;
1787         rc = qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_ports_cb,
1788                                 (void *)&cbctl);
1789         if (rc < 0)
1790                 return rc;
1791         return qeth_bridgeport_makerc(card, &cbctl, IPA_SBP_QUERY_BRIDGE_PORTS);
1792 }
1793
1794 static int qeth_bridgeport_set_cb(struct qeth_card *card,
1795         struct qeth_reply *reply, unsigned long data)
1796 {
1797         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
1798         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1799         QETH_CARD_TEXT(card, 2, "brsetrcb");
1800         cbctl->ipa_rc = cmd->hdr.return_code;
1801         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1802         return 0;
1803 }
1804
1805 /**
1806  * qeth_bridgeport_setrole() - Assign primary role to the port.
1807  * @card:                      qeth_card structure pointer.
1808  * @role:                      Role to assign.
1809  *
1810  * Returns negative errno-compatible error indication or 0 on success.
1811  */
1812 int qeth_bridgeport_setrole(struct qeth_card *card, enum qeth_sbp_roles role)
1813 {
1814         int rc = 0;
1815         int cmdlength;
1816         struct qeth_cmd_buffer *iob;
1817         struct _qeth_sbp_cbctl cbctl;
1818         enum qeth_ipa_sbp_cmd setcmd;
1819
1820         QETH_CARD_TEXT(card, 2, "brsetrol");
1821         switch (role) {
1822         case QETH_SBP_ROLE_NONE:
1823                 setcmd = IPA_SBP_RESET_BRIDGE_PORT_ROLE;
1824                 cmdlength = sizeof(struct qeth_sbp_reset_role);
1825                 break;
1826         case QETH_SBP_ROLE_PRIMARY:
1827                 setcmd = IPA_SBP_SET_PRIMARY_BRIDGE_PORT;
1828                 cmdlength = sizeof(struct qeth_sbp_set_primary);
1829                 break;
1830         case QETH_SBP_ROLE_SECONDARY:
1831                 setcmd = IPA_SBP_SET_SECONDARY_BRIDGE_PORT;
1832                 cmdlength = sizeof(struct qeth_sbp_set_secondary);
1833                 break;
1834         default:
1835                 return -EINVAL;
1836         }
1837         if (!(card->options.sbp.supported_funcs & setcmd))
1838                 return -EOPNOTSUPP;
1839         iob = qeth_sbp_build_cmd(card, setcmd, cmdlength);
1840         if (!iob)
1841                 return -ENOMEM;
1842         rc = qeth_send_ipa_cmd(card, iob, qeth_bridgeport_set_cb,
1843                                 (void *)&cbctl);
1844         if (rc < 0)
1845                 return rc;
1846         return qeth_bridgeport_makerc(card, &cbctl, setcmd);
1847 }
1848
1849 /**
1850  * qeth_anset_makerc() - derive "traditional" error from hardware codes.
1851  * @card:                     qeth_card structure pointer, for debug messages.
1852  *
1853  * Returns negative errno-compatible error indication or 0 on success.
1854  */
1855 static int qeth_anset_makerc(struct qeth_card *card, int pnso_rc, u16 response)
1856 {
1857         int rc;
1858
1859         if (pnso_rc == 0)
1860                 switch (response) {
1861                 case 0x0001:
1862                         rc = 0;
1863                         break;
1864                 case 0x0004:
1865                 case 0x0100:
1866                 case 0x0106:
1867                         rc = -EOPNOTSUPP;
1868                         dev_err(&card->gdev->dev,
1869                                 "Setting address notification failed\n");
1870                         break;
1871                 case 0x0107:
1872                         rc = -EAGAIN;
1873                         break;
1874                 default:
1875                         rc = -EIO;
1876                 }
1877         else
1878                 rc = -EIO;
1879
1880         if (rc) {
1881                 QETH_CARD_TEXT_(card, 2, "SBPp%04x", pnso_rc);
1882                 QETH_CARD_TEXT_(card, 2, "SBPr%04x", response);
1883         }
1884         return rc;
1885 }
1886
1887 static void qeth_bridgeport_an_set_cb(void *priv,
1888                 enum qdio_brinfo_entry_type type, void *entry)
1889 {
1890         struct qeth_card *card = (struct qeth_card *)priv;
1891         struct qdio_brinfo_entry_l2 *l2entry;
1892         u8 code;
1893
1894         if (type != l2_addr_lnid) {
1895                 WARN_ON_ONCE(1);
1896                 return;
1897         }
1898
1899         l2entry = (struct qdio_brinfo_entry_l2 *)entry;
1900         code = IPA_ADDR_CHANGE_CODE_MACADDR;
1901         if (l2entry->addr_lnid.lnid)
1902                 code |= IPA_ADDR_CHANGE_CODE_VLANID;
1903         qeth_bridge_emit_host_event(card, anev_reg_unreg, code,
1904                 (struct net_if_token *)&l2entry->nit,
1905                 (struct mac_addr_lnid *)&l2entry->addr_lnid);
1906 }
1907
1908 /**
1909  * qeth_bridgeport_an_set() - Enable or disable bridgeport address notification
1910  * @card:                     qeth_card structure pointer.
1911  * @enable:                   0 - disable, non-zero - enable notifications
1912  *
1913  * Returns negative errno-compatible error indication or 0 on success.
1914  *
1915  * On enable, emits a series of address notifications udev events for all
1916  * currently registered hosts.
1917  */
1918 int qeth_bridgeport_an_set(struct qeth_card *card, int enable)
1919 {
1920         int rc;
1921         u16 response;
1922         struct ccw_device *ddev;
1923         struct subchannel_id schid;
1924
1925         if (!card)
1926                 return -EINVAL;
1927         if (!card->options.sbp.supported_funcs)
1928                 return -EOPNOTSUPP;
1929         ddev = CARD_DDEV(card);
1930         ccw_device_get_schid(ddev, &schid);
1931
1932         if (enable) {
1933                 qeth_bridge_emit_host_event(card, anev_reset, 0, NULL, NULL);
1934                 rc = qdio_pnso_brinfo(schid, 1, &response,
1935                         qeth_bridgeport_an_set_cb, card);
1936         } else
1937                 rc = qdio_pnso_brinfo(schid, 0, &response, NULL, NULL);
1938         return qeth_anset_makerc(card, rc, response);
1939 }
1940
1941 static bool qeth_bridgeport_is_in_use(struct qeth_card *card)
1942 {
1943         return (card->options.sbp.role || card->options.sbp.reflect_promisc ||
1944                 card->options.sbp.hostnotification);
1945 }
1946
1947 /* VNIC Characteristics support */
1948
1949 /* handle VNICC IPA command return codes; convert to error codes */
1950 static int qeth_l2_vnicc_makerc(struct qeth_card *card, int ipa_rc)
1951 {
1952         int rc;
1953
1954         switch (ipa_rc) {
1955         case IPA_RC_SUCCESS:
1956                 return ipa_rc;
1957         case IPA_RC_L2_UNSUPPORTED_CMD:
1958         case IPA_RC_NOTSUPP:
1959                 rc = -EOPNOTSUPP;
1960                 break;
1961         case IPA_RC_VNICC_OOSEQ:
1962                 rc = -EALREADY;
1963                 break;
1964         case IPA_RC_VNICC_VNICBP:
1965                 rc = -EBUSY;
1966                 break;
1967         case IPA_RC_L2_ADDR_TABLE_FULL:
1968                 rc = -ENOSPC;
1969                 break;
1970         case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
1971                 rc = -EACCES;
1972                 break;
1973         default:
1974                 rc = -EIO;
1975         }
1976
1977         QETH_CARD_TEXT_(card, 2, "err%04x", ipa_rc);
1978         return rc;
1979 }
1980
1981 /* generic VNICC request call back control */
1982 struct _qeth_l2_vnicc_request_cbctl {
1983         u32 sub_cmd;
1984         struct {
1985                 u32 vnic_char;
1986                 u32 timeout;
1987         } param;
1988         struct {
1989                 union{
1990                         u32 *sup_cmds;
1991                         u32 *timeout;
1992                 };
1993         } result;
1994 };
1995
1996 /* generic VNICC request call back */
1997 static int qeth_l2_vnicc_request_cb(struct qeth_card *card,
1998                                     struct qeth_reply *reply,
1999                                     unsigned long data)
2000 {
2001         struct _qeth_l2_vnicc_request_cbctl *cbctl =
2002                 (struct _qeth_l2_vnicc_request_cbctl *) reply->param;
2003         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2004         struct qeth_ipacmd_vnicc *rep = &cmd->data.vnicc;
2005
2006         QETH_CARD_TEXT(card, 2, "vniccrcb");
2007         if (cmd->hdr.return_code)
2008                 return 0;
2009         /* return results to caller */
2010         card->options.vnicc.sup_chars = rep->hdr.sup;
2011         card->options.vnicc.cur_chars = rep->hdr.cur;
2012
2013         if (cbctl->sub_cmd == IPA_VNICC_QUERY_CMDS)
2014                 *cbctl->result.sup_cmds = rep->query_cmds.sup_cmds;
2015
2016         if (cbctl->sub_cmd == IPA_VNICC_GET_TIMEOUT)
2017                 *cbctl->result.timeout = rep->getset_timeout.timeout;
2018
2019         return 0;
2020 }
2021
2022 /* generic VNICC request */
2023 static int qeth_l2_vnicc_request(struct qeth_card *card,
2024                                  struct _qeth_l2_vnicc_request_cbctl *cbctl)
2025 {
2026         struct qeth_ipacmd_vnicc *req;
2027         struct qeth_cmd_buffer *iob;
2028         struct qeth_ipa_cmd *cmd;
2029         int rc;
2030
2031         QETH_CARD_TEXT(card, 2, "vniccreq");
2032
2033         /* get new buffer for request */
2034         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_VNICC, 0);
2035         if (!iob)
2036                 return -ENOMEM;
2037
2038         /* create header for request */
2039         cmd = __ipa_cmd(iob);
2040         req = &cmd->data.vnicc;
2041
2042         /* create sub command header for request */
2043         req->sub_hdr.data_length = sizeof(req->sub_hdr);
2044         req->sub_hdr.sub_command = cbctl->sub_cmd;
2045
2046         /* create sub command specific request fields */
2047         switch (cbctl->sub_cmd) {
2048         case IPA_VNICC_QUERY_CHARS:
2049                 break;
2050         case IPA_VNICC_QUERY_CMDS:
2051                 req->sub_hdr.data_length += sizeof(req->query_cmds);
2052                 req->query_cmds.vnic_char = cbctl->param.vnic_char;
2053                 break;
2054         case IPA_VNICC_ENABLE:
2055         case IPA_VNICC_DISABLE:
2056                 req->sub_hdr.data_length += sizeof(req->set_char);
2057                 req->set_char.vnic_char = cbctl->param.vnic_char;
2058                 break;
2059         case IPA_VNICC_SET_TIMEOUT:
2060                 req->getset_timeout.timeout = cbctl->param.timeout;
2061                 /* fallthrough */
2062         case IPA_VNICC_GET_TIMEOUT:
2063                 req->sub_hdr.data_length += sizeof(req->getset_timeout);
2064                 req->getset_timeout.vnic_char = cbctl->param.vnic_char;
2065                 break;
2066         default:
2067                 qeth_release_buffer(iob->channel, iob);
2068                 return -EOPNOTSUPP;
2069         }
2070
2071         /* send request */
2072         rc = qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb,
2073                                (void *) cbctl);
2074
2075         return qeth_l2_vnicc_makerc(card, rc);
2076 }
2077
2078 /* VNICC query VNIC characteristics request */
2079 static int qeth_l2_vnicc_query_chars(struct qeth_card *card)
2080 {
2081         struct _qeth_l2_vnicc_request_cbctl cbctl;
2082
2083         /* prepare callback control */
2084         cbctl.sub_cmd = IPA_VNICC_QUERY_CHARS;
2085
2086         QETH_CARD_TEXT(card, 2, "vniccqch");
2087         return qeth_l2_vnicc_request(card, &cbctl);
2088 }
2089
2090 /* VNICC query sub commands request */
2091 static int qeth_l2_vnicc_query_cmds(struct qeth_card *card, u32 vnic_char,
2092                                     u32 *sup_cmds)
2093 {
2094         struct _qeth_l2_vnicc_request_cbctl cbctl;
2095
2096         /* prepare callback control */
2097         cbctl.sub_cmd = IPA_VNICC_QUERY_CMDS;
2098         cbctl.param.vnic_char = vnic_char;
2099         cbctl.result.sup_cmds = sup_cmds;
2100
2101         QETH_CARD_TEXT(card, 2, "vniccqcm");
2102         return qeth_l2_vnicc_request(card, &cbctl);
2103 }
2104
2105 /* VNICC enable/disable characteristic request */
2106 static int qeth_l2_vnicc_set_char(struct qeth_card *card, u32 vnic_char,
2107                                       u32 cmd)
2108 {
2109         struct _qeth_l2_vnicc_request_cbctl cbctl;
2110
2111         /* prepare callback control */
2112         cbctl.sub_cmd = cmd;
2113         cbctl.param.vnic_char = vnic_char;
2114
2115         QETH_CARD_TEXT(card, 2, "vniccedc");
2116         return qeth_l2_vnicc_request(card, &cbctl);
2117 }
2118
2119 /* VNICC get/set timeout for characteristic request */
2120 static int qeth_l2_vnicc_getset_timeout(struct qeth_card *card, u32 vnicc,
2121                                         u32 cmd, u32 *timeout)
2122 {
2123         struct _qeth_l2_vnicc_request_cbctl cbctl;
2124
2125         /* prepare callback control */
2126         cbctl.sub_cmd = cmd;
2127         cbctl.param.vnic_char = vnicc;
2128         if (cmd == IPA_VNICC_SET_TIMEOUT)
2129                 cbctl.param.timeout = *timeout;
2130         if (cmd == IPA_VNICC_GET_TIMEOUT)
2131                 cbctl.result.timeout = timeout;
2132
2133         QETH_CARD_TEXT(card, 2, "vniccgst");
2134         return qeth_l2_vnicc_request(card, &cbctl);
2135 }
2136
2137 /* set current VNICC flag state; called from sysfs store function */
2138 int qeth_l2_vnicc_set_state(struct qeth_card *card, u32 vnicc, bool state)
2139 {
2140         int rc = 0;
2141         u32 cmd;
2142
2143         QETH_CARD_TEXT(card, 2, "vniccsch");
2144
2145         /* do not change anything if BridgePort is enabled */
2146         if (qeth_bridgeport_is_in_use(card))
2147                 return -EBUSY;
2148
2149         /* check if characteristic and enable/disable are supported */
2150         if (!(card->options.vnicc.sup_chars & vnicc) ||
2151             !(card->options.vnicc.set_char_sup & vnicc))
2152                 return -EOPNOTSUPP;
2153
2154         /* set enable/disable command and store wanted characteristic */
2155         if (state) {
2156                 cmd = IPA_VNICC_ENABLE;
2157                 card->options.vnicc.wanted_chars |= vnicc;
2158         } else {
2159                 cmd = IPA_VNICC_DISABLE;
2160                 card->options.vnicc.wanted_chars &= ~vnicc;
2161         }
2162
2163         /* do we need to do anything? */
2164         if (card->options.vnicc.cur_chars == card->options.vnicc.wanted_chars)
2165                 return rc;
2166
2167         /* if card is not ready, simply stop here */
2168         if (!qeth_card_hw_is_reachable(card)) {
2169                 if (state)
2170                         card->options.vnicc.cur_chars |= vnicc;
2171                 else
2172                         card->options.vnicc.cur_chars &= ~vnicc;
2173                 return rc;
2174         }
2175
2176         rc = qeth_l2_vnicc_set_char(card, vnicc, cmd);
2177         if (rc)
2178                 card->options.vnicc.wanted_chars =
2179                         card->options.vnicc.cur_chars;
2180         else {
2181                 /* successful online VNICC change; handle special cases */
2182                 if (state && vnicc == QETH_VNICC_RX_BCAST)
2183                         card->options.vnicc.rx_bcast_enabled = true;
2184                 if (!state && vnicc == QETH_VNICC_LEARNING)
2185                         qeth_l2_vnicc_recover_timeout(card, vnicc,
2186                                         &card->options.vnicc.learning_timeout);
2187         }
2188
2189         return rc;
2190 }
2191
2192 /* get current VNICC flag state; called from sysfs show function */
2193 int qeth_l2_vnicc_get_state(struct qeth_card *card, u32 vnicc, bool *state)
2194 {
2195         int rc = 0;
2196
2197         QETH_CARD_TEXT(card, 2, "vniccgch");
2198
2199         /* do not get anything if BridgePort is enabled */
2200         if (qeth_bridgeport_is_in_use(card))
2201                 return -EBUSY;
2202
2203         /* check if characteristic is supported */
2204         if (!(card->options.vnicc.sup_chars & vnicc))
2205                 return -EOPNOTSUPP;
2206
2207         /* if card is ready, query current VNICC state */
2208         if (qeth_card_hw_is_reachable(card))
2209                 rc = qeth_l2_vnicc_query_chars(card);
2210
2211         *state = (card->options.vnicc.cur_chars & vnicc) ? true : false;
2212         return rc;
2213 }
2214
2215 /* set VNICC timeout; called from sysfs store function. Currently, only learning
2216  * supports timeout
2217  */
2218 int qeth_l2_vnicc_set_timeout(struct qeth_card *card, u32 timeout)
2219 {
2220         int rc = 0;
2221
2222         QETH_CARD_TEXT(card, 2, "vniccsto");
2223
2224         /* do not change anything if BridgePort is enabled */
2225         if (qeth_bridgeport_is_in_use(card))
2226                 return -EBUSY;
2227
2228         /* check if characteristic and set_timeout are supported */
2229         if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
2230             !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
2231                 return -EOPNOTSUPP;
2232
2233         /* do we need to do anything? */
2234         if (card->options.vnicc.learning_timeout == timeout)
2235                 return rc;
2236
2237         /* if card is not ready, simply store the value internally and return */
2238         if (!qeth_card_hw_is_reachable(card)) {
2239                 card->options.vnicc.learning_timeout = timeout;
2240                 return rc;
2241         }
2242
2243         /* send timeout value to card; if successful, store value internally */
2244         rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
2245                                           IPA_VNICC_SET_TIMEOUT, &timeout);
2246         if (!rc)
2247                 card->options.vnicc.learning_timeout = timeout;
2248
2249         return rc;
2250 }
2251
2252 /* get current VNICC timeout; called from sysfs show function. Currently, only
2253  * learning supports timeout
2254  */
2255 int qeth_l2_vnicc_get_timeout(struct qeth_card *card, u32 *timeout)
2256 {
2257         int rc = 0;
2258
2259         QETH_CARD_TEXT(card, 2, "vniccgto");
2260
2261         /* do not get anything if BridgePort is enabled */
2262         if (qeth_bridgeport_is_in_use(card))
2263                 return -EBUSY;
2264
2265         /* check if characteristic and get_timeout are supported */
2266         if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
2267             !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
2268                 return -EOPNOTSUPP;
2269         /* if card is ready, get timeout. Otherwise, just return stored value */
2270         *timeout = card->options.vnicc.learning_timeout;
2271         if (qeth_card_hw_is_reachable(card))
2272                 rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
2273                                                   IPA_VNICC_GET_TIMEOUT,
2274                                                   timeout);
2275
2276         return rc;
2277 }
2278
2279 /* check if VNICC is currently enabled */
2280 bool qeth_l2_vnicc_is_in_use(struct qeth_card *card)
2281 {
2282         /* if everything is turned off, VNICC is not active */
2283         if (!card->options.vnicc.cur_chars)
2284                 return false;
2285         /* default values are only OK if rx_bcast was not enabled by user
2286          * or the card is offline.
2287          */
2288         if (card->options.vnicc.cur_chars == QETH_VNICC_DEFAULT) {
2289                 if (!card->options.vnicc.rx_bcast_enabled ||
2290                     !qeth_card_hw_is_reachable(card))
2291                         return false;
2292         }
2293         return true;
2294 }
2295
2296 /* recover user timeout setting */
2297 static bool qeth_l2_vnicc_recover_timeout(struct qeth_card *card, u32 vnicc,
2298                                           u32 *timeout)
2299 {
2300         if (card->options.vnicc.sup_chars & vnicc &&
2301             card->options.vnicc.getset_timeout_sup & vnicc &&
2302             !qeth_l2_vnicc_getset_timeout(card, vnicc, IPA_VNICC_SET_TIMEOUT,
2303                                           timeout))
2304                 return false;
2305         *timeout = QETH_VNICC_DEFAULT_TIMEOUT;
2306         return true;
2307 }
2308
2309 /* recover user characteristic setting */
2310 static bool qeth_l2_vnicc_recover_char(struct qeth_card *card, u32 vnicc,
2311                                        bool enable)
2312 {
2313         u32 cmd = enable ? IPA_VNICC_ENABLE : IPA_VNICC_DISABLE;
2314
2315         if (card->options.vnicc.sup_chars & vnicc &&
2316             card->options.vnicc.set_char_sup & vnicc &&
2317             !qeth_l2_vnicc_set_char(card, vnicc, cmd))
2318                 return false;
2319         card->options.vnicc.wanted_chars &= ~vnicc;
2320         card->options.vnicc.wanted_chars |= QETH_VNICC_DEFAULT & vnicc;
2321         return true;
2322 }
2323
2324 /* (re-)initialize VNICC */
2325 static void qeth_l2_vnicc_init(struct qeth_card *card)
2326 {
2327         u32 *timeout = &card->options.vnicc.learning_timeout;
2328         unsigned int chars_len, i;
2329         unsigned long chars_tmp;
2330         u32 sup_cmds, vnicc;
2331         bool enable, error;
2332
2333         QETH_CARD_TEXT(card, 2, "vniccini");
2334         /* reset rx_bcast */
2335         card->options.vnicc.rx_bcast_enabled = 0;
2336         /* initial query and storage of VNIC characteristics */
2337         if (qeth_l2_vnicc_query_chars(card)) {
2338                 if (card->options.vnicc.wanted_chars != QETH_VNICC_DEFAULT ||
2339                     *timeout != QETH_VNICC_DEFAULT_TIMEOUT)
2340                         dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
2341                 /* fail quietly if user didn't change the default config */
2342                 card->options.vnicc.sup_chars = 0;
2343                 card->options.vnicc.cur_chars = 0;
2344                 card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
2345                 return;
2346         }
2347         /* get supported commands for each supported characteristic */
2348         chars_tmp = card->options.vnicc.sup_chars;
2349         chars_len = sizeof(card->options.vnicc.sup_chars) * BITS_PER_BYTE;
2350         for_each_set_bit(i, &chars_tmp, chars_len) {
2351                 vnicc = BIT(i);
2352                 qeth_l2_vnicc_query_cmds(card, vnicc, &sup_cmds);
2353                 if (!(sup_cmds & IPA_VNICC_SET_TIMEOUT) ||
2354                     !(sup_cmds & IPA_VNICC_GET_TIMEOUT))
2355                         card->options.vnicc.getset_timeout_sup &= ~vnicc;
2356                 if (!(sup_cmds & IPA_VNICC_ENABLE) ||
2357                     !(sup_cmds & IPA_VNICC_DISABLE))
2358                         card->options.vnicc.set_char_sup &= ~vnicc;
2359         }
2360         /* enforce assumed default values and recover settings, if changed  */
2361         error = qeth_l2_vnicc_recover_timeout(card, QETH_VNICC_LEARNING,
2362                                               timeout);
2363         chars_tmp = card->options.vnicc.wanted_chars ^ QETH_VNICC_DEFAULT;
2364         chars_tmp |= QETH_VNICC_BRIDGE_INVISIBLE;
2365         chars_len = sizeof(card->options.vnicc.wanted_chars) * BITS_PER_BYTE;
2366         for_each_set_bit(i, &chars_tmp, chars_len) {
2367                 vnicc = BIT(i);
2368                 enable = card->options.vnicc.wanted_chars & vnicc;
2369                 error |= qeth_l2_vnicc_recover_char(card, vnicc, enable);
2370         }
2371         if (error)
2372                 dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
2373 }
2374
2375 /* configure default values of VNIC characteristics */
2376 static void qeth_l2_vnicc_set_defaults(struct qeth_card *card)
2377 {
2378         /* characteristics values */
2379         card->options.vnicc.sup_chars = QETH_VNICC_ALL;
2380         card->options.vnicc.cur_chars = QETH_VNICC_DEFAULT;
2381         card->options.vnicc.learning_timeout = QETH_VNICC_DEFAULT_TIMEOUT;
2382         /* supported commands */
2383         card->options.vnicc.set_char_sup = QETH_VNICC_ALL;
2384         card->options.vnicc.getset_timeout_sup = QETH_VNICC_LEARNING;
2385         /* settings wanted by users */
2386         card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
2387 }
2388
2389 module_init(qeth_l2_init);
2390 module_exit(qeth_l2_exit);
2391 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
2392 MODULE_DESCRIPTION("qeth layer 2 discipline");
2393 MODULE_LICENSE("GPL");