drivers/s390/net/qeth_l2_main.c

   1 /*
   2  *  drivers/s390/net/qeth_l2_main.c
   3  *
   4  *    Copyright IBM Corp. 2007, 2009
   5  *    Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
   6  *               Frank Pavlic <fpavlic@de.ibm.com>,
   7  *               Thomas Spatzier <tspat@de.ibm.com>,
   8  *               Frank Blaschka <frank.blaschka@de.ibm.com>
   9  */
  10
  11 #define KMSG_COMPONENT "qeth"
  12 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  13
  14 #include <linux/module.h>
  15 #include <linux/moduleparam.h>
  16 #include <linux/string.h>
  17 #include <linux/errno.h>
  18 #include <linux/kernel.h>
  19 #include <linux/slab.h>
  20 #include <linux/etherdevice.h>
  21 #include <linux/mii.h>
  22 #include <linux/ip.h>
  23 #include <linux/list.h>
  24
  25 #include "qeth_core.h"
  26
  27 static int qeth_l2_set_offline(struct ccwgroup_device *);
  28 static int qeth_l2_stop(struct net_device *);
  29 static int qeth_l2_send_delmac(struct qeth_card *, __u8 *);
  30 static int qeth_l2_send_setdelmac(struct qeth_card *, __u8 *,
  31                            enum qeth_ipa_cmds,
  32                            int (*reply_cb) (struct qeth_card *,
  33                                             struct qeth_reply*,
  34                                             unsigned long));
  35 static void qeth_l2_set_multicast_list(struct net_device *);
  36 static int qeth_l2_recover(void *);
  37
  38 static int qeth_l2_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
  39 {
  40         struct qeth_card *card = dev->ml_priv;
  41         struct mii_ioctl_data *mii_data;
  42         int rc = 0;
  43
  44         if (!card)
  45                 return -ENODEV;
  46
  47         if ((card->state != CARD_STATE_UP) &&
  48                 (card->state != CARD_STATE_SOFTSETUP))
  49                 return -ENODEV;
  50
  51         if (card->info.type == QETH_CARD_TYPE_OSN)
  52                 return -EPERM;
  53
  54         switch (cmd) {
  55         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
  56                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
  57                 break;
  58         case SIOC_QETH_GET_CARD_TYPE:
  59                 if ((card->info.type == QETH_CARD_TYPE_OSD ||
  60                      card->info.type == QETH_CARD_TYPE_OSM ||
  61                      card->info.type == QETH_CARD_TYPE_OSX) &&
  62                     !card->info.guestlan)
  63                         return 1;
  64                 return 0;
  65                 break;
  66         case SIOCGMIIPHY:
  67                 mii_data = if_mii(rq);
  68                 mii_data->phy_id = 0;
  69                 break;
  70         case SIOCGMIIREG:
  71                 mii_data = if_mii(rq);
  72                 if (mii_data->phy_id != 0)
  73                         rc = -EINVAL;
  74                 else
  75                         mii_data->val_out = qeth_mdio_read(dev,
  76                                 mii_data->phy_id, mii_data->reg_num);
  77                 break;
  78         default:
  79                 rc = -EOPNOTSUPP;
  80         }
  81         if (rc)
  82                 QETH_CARD_TEXT_(card, 2, "ioce%d", rc);
  83         return rc;
  84 }
  85
  86 static int qeth_l2_verify_dev(struct net_device *dev)
  87 {
  88         struct qeth_card *card;
  89         unsigned long flags;
  90         int rc = 0;
  91
  92         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
  93         list_for_each_entry(card, &qeth_core_card_list.list, list) {
  94                 if (card->dev == dev) {
  95                         rc = QETH_REAL_CARD;
  96                         break;
  97                 }
  98         }
  99         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
 100
 101         return rc;
 102 }
 103
 104 static struct net_device *qeth_l2_netdev_by_devno(unsigned char *read_dev_no)
 105 {
 106         struct qeth_card *card;
 107         struct net_device *ndev;
 108         __u16 temp_dev_no;
 109         unsigned long flags;
 110         struct ccw_dev_id read_devid;
 111
 112         ndev = NULL;
 113         memcpy(&temp_dev_no, read_dev_no, 2);
 114         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
 115         list_for_each_entry(card, &qeth_core_card_list.list, list) {
 116                 ccw_device_get_id(CARD_RDEV(card), &read_devid);
 117                 if (read_devid.devno == temp_dev_no) {
 118                         ndev = card->dev;
 119                         break;
 120                 }
 121         }
 122         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
 123         return ndev;
 124 }
 125
 126 static int qeth_l2_send_setgroupmac_cb(struct qeth_card *card,
 127                                 struct qeth_reply *reply,
 128                                 unsigned long data)
 129 {
 130         struct qeth_ipa_cmd *cmd;
 131         __u8 *mac;
 132
 133         QETH_CARD_TEXT(card, 2, "L2Sgmacb");
 134         cmd = (struct qeth_ipa_cmd *) data;
 135         mac = &cmd->data.setdelmac.mac[0];
 136         /* MAC already registered, needed in couple/uncouple case */
 137         if (cmd->hdr.return_code ==  IPA_RC_L2_DUP_MAC) {
 138                 QETH_DBF_MESSAGE(2, "Group MAC %pM already existing on %s \n",
 139                           mac, QETH_CARD_IFNAME(card));
 140                 cmd->hdr.return_code = 0;
 141         }
 142         if (cmd->hdr.return_code)
 143                 QETH_DBF_MESSAGE(2, "Could not set group MAC %pM on %s: %x\n",
 144                           mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 145         return 0;
 146 }
 147
 148 static int qeth_l2_send_setgroupmac(struct qeth_card *card, __u8 *mac)
 149 {
 150         QETH_CARD_TEXT(card, 2, "L2Sgmac");
 151         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETGMAC,
 152                                           qeth_l2_send_setgroupmac_cb);
 153 }
 154
 155 static int qeth_l2_send_delgroupmac_cb(struct qeth_card *card,
 156                                 struct qeth_reply *reply,
 157                                 unsigned long data)
 158 {
 159         struct qeth_ipa_cmd *cmd;
 160         __u8 *mac;
 161
 162         QETH_CARD_TEXT(card, 2, "L2Dgmacb");
 163         cmd = (struct qeth_ipa_cmd *) data;
 164         mac = &cmd->data.setdelmac.mac[0];
 165         if (cmd->hdr.return_code)
 166                 QETH_DBF_MESSAGE(2, "Could not delete group MAC %pM on %s: %x\n",
 167                           mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 168         return 0;
 169 }
 170
 171 static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac)
 172 {
 173         QETH_CARD_TEXT(card, 2, "L2Dgmac");
 174         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELGMAC,
 175                                           qeth_l2_send_delgroupmac_cb);
 176 }
 177
 178 static void qeth_l2_add_mc(struct qeth_card *card, __u8 *mac, int vmac)
 179 {
 180         struct qeth_mc_mac *mc;
 181         int rc;
 182
 183         mc = kmalloc(sizeof(struct qeth_mc_mac), GFP_ATOMIC);
 184
 185         if (!mc)
 186                 return;
 187
 188         memcpy(mc->mc_addr, mac, OSA_ADDR_LEN);
 189         mc->mc_addrlen = OSA_ADDR_LEN;
 190         mc->is_vmac = vmac;
 191
 192         if (vmac) {
 193                 rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
 194                                         NULL);
 195         } else {
 196                 rc = qeth_l2_send_setgroupmac(card, mac);
 197         }
 198
 199         if (!rc)
 200                 list_add_tail(&mc->list, &card->mc_list);
 201         else
 202                 kfree(mc);
 203 }
 204
 205 static void qeth_l2_del_all_mc(struct qeth_card *card)
 206 {
 207         struct qeth_mc_mac *mc, *tmp;
 208
 209         spin_lock_bh(&card->mclock);
 210         list_for_each_entry_safe(mc, tmp, &card->mc_list, list) {
 211                 if (mc->is_vmac)
 212                         qeth_l2_send_setdelmac(card, mc->mc_addr,
 213                                         IPA_CMD_DELVMAC, NULL);
 214                 else
 215                         qeth_l2_send_delgroupmac(card, mc->mc_addr);
 216                 list_del(&mc->list);
 217                 kfree(mc);
 218         }
 219         spin_unlock_bh(&card->mclock);
 220 }
 221
 222 static inline int qeth_l2_get_cast_type(struct qeth_card *card,
 223                         struct sk_buff *skb)
 224 {
 225         if (card->info.type == QETH_CARD_TYPE_OSN)
 226                 return RTN_UNSPEC;
 227         if (is_broadcast_ether_addr(skb->data))
 228                 return RTN_BROADCAST;
 229         if (is_multicast_ether_addr(skb->data))
 230                 return RTN_MULTICAST;
 231         return RTN_UNSPEC;
 232 }
 233
 234 static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
 235                         struct sk_buff *skb, int ipv, int cast_type)
 236 {
 237         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
 238
 239         memset(hdr, 0, sizeof(struct qeth_hdr));
 240         hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
 241
 242         /* set byte byte 3 to casting flags */
 243         if (cast_type == RTN_MULTICAST)
 244                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 245         else if (cast_type == RTN_BROADCAST)
 246                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 247         else
 248                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 249
 250         hdr->hdr.l2.pkt_length = skb->len-QETH_HEADER_SIZE;
 251         /* VSWITCH relies on the VLAN
 252          * information to be present in
 253          * the QDIO header */
 254         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
 255                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
 256                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
 257         }
 258 }
 259
 260 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
 261                         struct qeth_reply *reply, unsigned long data)
 262 {
 263         struct qeth_ipa_cmd *cmd;
 264
 265         QETH_CARD_TEXT(card, 2, "L2sdvcb");
 266         cmd = (struct qeth_ipa_cmd *) data;
 267         if (cmd->hdr.return_code) {
 268                 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x. "
 269                           "Continuing\n", cmd->data.setdelvlan.vlan_id,
 270                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 271                 QETH_CARD_TEXT_(card, 2, "L2VL%4x", cmd->hdr.command);
 272                 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code);
 273         }
 274         return 0;
 275 }
 276
 277 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
 278                                 enum qeth_ipa_cmds ipacmd)
 279 {
 280         struct qeth_ipa_cmd *cmd;
 281         struct qeth_cmd_buffer *iob;
 282
 283         QETH_CARD_TEXT_(card, 4, "L2sdv%x", ipacmd);
 284         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 285         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 286         cmd->data.setdelvlan.vlan_id = i;
 287         return qeth_send_ipa_cmd(card, iob,
 288                                  qeth_l2_send_setdelvlan_cb, NULL);
 289 }
 290
 291 static void qeth_l2_process_vlans(struct qeth_card *card, int clear)
 292 {
 293         struct qeth_vlan_vid *id;
 294         QETH_CARD_TEXT(card, 3, "L2prcvln");
 295         spin_lock_bh(&card->vlanlock);
 296         list_for_each_entry(id, &card->vid_list, list) {
 297                 if (clear)
 298                         qeth_l2_send_setdelvlan(card, id->vid,
 299                                 IPA_CMD_DELVLAN);
 300                 else
 301                         qeth_l2_send_setdelvlan(card, id->vid,
 302                                 IPA_CMD_SETVLAN);
 303         }
 304         spin_unlock_bh(&card->vlanlock);
 305 }
 306
 307 static void qeth_l2_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
 308 {
 309         struct qeth_card *card = dev->ml_priv;
 310         struct qeth_vlan_vid *id;
 311
 312         QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
 313         if (!vid)
 314                 return;
 315         if (card->info.type == QETH_CARD_TYPE_OSM) {
 316                 QETH_CARD_TEXT(card, 3, "aidOSM");
 317                 return;
 318         }
 319         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 320                 QETH_CARD_TEXT(card, 3, "aidREC");
 321                 return;
 322         }
 323         id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
 324         if (id) {
 325                 id->vid = vid;
 326                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
 327                 spin_lock_bh(&card->vlanlock);
 328                 list_add_tail(&id->list, &card->vid_list);
 329                 spin_unlock_bh(&card->vlanlock);
 330         }
 331 }
 332
 333 static void qeth_l2_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
 334 {
 335         struct qeth_vlan_vid *id, *tmpid = NULL;
 336         struct qeth_card *card = dev->ml_priv;
 337
 338         QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
 339         if (card->info.type == QETH_CARD_TYPE_OSM) {
 340                 QETH_CARD_TEXT(card, 3, "kidOSM");
 341                 return;
 342         }
 343         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 344                 QETH_CARD_TEXT(card, 3, "kidREC");
 345                 return;
 346         }
 347         spin_lock_bh(&card->vlanlock);
 348         list_for_each_entry(id, &card->vid_list, list) {
 349                 if (id->vid == vid) {
 350                         list_del(&id->list);
 351                         tmpid = id;
 352                         break;
 353                 }
 354         }
 355         spin_unlock_bh(&card->vlanlock);
 356         if (tmpid) {
 357                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 358                 kfree(tmpid);
 359         }
 360         qeth_l2_set_multicast_list(card->dev);
 361 }
 362
 363 static int qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
 364 {
 365         int rc = 0;
 366
 367         QETH_DBF_TEXT(SETUP , 2, "stopcard");
 368         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 369
 370         qeth_set_allowed_threads(card, 0, 1);
 371         if (card->read.state == CH_STATE_UP &&
 372             card->write.state == CH_STATE_UP &&
 373             (card->state == CARD_STATE_UP)) {
 374                 if (recovery_mode &&
 375                     card->info.type != QETH_CARD_TYPE_OSN) {
 376                         qeth_l2_stop(card->dev);
 377                 } else {
 378                         rtnl_lock();
 379                         dev_close(card->dev);
 380                         rtnl_unlock();
 381                 }
 382                 if (!card->use_hard_stop ||
 383                         recovery_mode) {
 384                         __u8 *mac = &card->dev->dev_addr[0];
 385                         rc = qeth_l2_send_delmac(card, mac);
 386                         QETH_DBF_TEXT_(SETUP, 2, "Lerr%d", rc);
 387                 }
 388                 card->state = CARD_STATE_SOFTSETUP;
 389         }
 390         if (card->state == CARD_STATE_SOFTSETUP) {
 391                 qeth_l2_process_vlans(card, 1);
 392                 if (!card->use_hard_stop ||
 393                         recovery_mode)
 394                         qeth_l2_del_all_mc(card);
 395                 qeth_clear_ipacmd_list(card);
 396                 card->state = CARD_STATE_HARDSETUP;
 397         }
 398         if (card->state == CARD_STATE_HARDSETUP) {
 399                 qeth_qdio_clear_card(card, 0);
 400                 qeth_clear_qdio_buffers(card);
 401                 qeth_clear_working_pool_list(card);
 402                 card->state = CARD_STATE_DOWN;
 403         }
 404         if (card->state == CARD_STATE_DOWN) {
 405                 qeth_clear_cmd_buffers(&card->read);
 406                 qeth_clear_cmd_buffers(&card->write);
 407         }
 408         card->use_hard_stop = 0;
 409         return rc;
 410 }
 411
 412 static int qeth_l2_process_inbound_buffer(struct qeth_card *card,
 413                                 int budget, int *done)
 414 {
 415         int work_done = 0;
 416         struct sk_buff *skb;
 417         struct qeth_hdr *hdr;
 418         unsigned int len;
 419
 420         *done = 0;
 421         BUG_ON(!budget);
 422         while (budget) {
 423                 skb = qeth_core_get_next_skb(card,
 424                         card->qdio.in_q->bufs[card->rx.b_index].buffer,
 425                         &card->rx.b_element, &card->rx.e_offset, &hdr);
 426                 if (!skb) {
 427                         *done = 1;
 428                         break;
 429                 }
 430                 skb->dev = card->dev;
 431                 switch (hdr->hdr.l2.id) {
 432                 case QETH_HEADER_TYPE_LAYER2:
 433                         skb->pkt_type = PACKET_HOST;
 434                         skb->protocol = eth_type_trans(skb, skb->dev);
 435                         if (card->options.checksum_type == NO_CHECKSUMMING)
 436                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 437                         else
 438                                 skb->ip_summed = CHECKSUM_NONE;
 439                         if (skb->protocol == htons(ETH_P_802_2))
 440                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
 441                         len = skb->len;
 442                         netif_receive_skb(skb);
 443                         break;
 444                 case QETH_HEADER_TYPE_OSN:
 445                         if (card->info.type == QETH_CARD_TYPE_OSN) {
 446                                 skb_push(skb, sizeof(struct qeth_hdr));
 447                                 skb_copy_to_linear_data(skb, hdr,
 448                                                 sizeof(struct qeth_hdr));
 449                                 len = skb->len;
 450                                 card->osn_info.data_cb(skb);
 451                                 break;
 452                         }
 453                         /* else unknown */
 454                 default:
 455                         dev_kfree_skb_any(skb);
 456                         QETH_CARD_TEXT(card, 3, "inbunkno");
 457                         QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
 458                         continue;
 459                 }
 460                 work_done++;
 461                 budget--;
 462                 card->stats.rx_packets++;
 463                 card->stats.rx_bytes += len;
 464         }
 465         return work_done;
 466 }
 467
 468 static int qeth_l2_poll(struct napi_struct *napi, int budget)
 469 {
 470         struct qeth_card *card = container_of(napi, struct qeth_card, napi);
 471         int work_done = 0;
 472         struct qeth_qdio_buffer *buffer;
 473         int done;
 474         int new_budget = budget;
 475
 476         if (card->options.performance_stats) {
 477                 card->perf_stats.inbound_cnt++;
 478                 card->perf_stats.inbound_start_time = qeth_get_micros();
 479         }
 480
 481         while (1) {
 482                 if (!card->rx.b_count) {
 483                         card->rx.qdio_err = 0;
 484                         card->rx.b_count = qdio_get_next_buffers(
 485                                 card->data.ccwdev, 0, &card->rx.b_index,
 486                                 &card->rx.qdio_err);
 487                         if (card->rx.b_count <= 0) {
 488                                 card->rx.b_count = 0;
 489                                 break;
 490                         }
 491                         card->rx.b_element =
 492                                 &card->qdio.in_q->bufs[card->rx.b_index]
 493                                 .buffer->element[0];
 494                         card->rx.e_offset = 0;
 495                 }
 496
 497                 while (card->rx.b_count) {
 498                         buffer = &card->qdio.in_q->bufs[card->rx.b_index];
 499                         if (!(card->rx.qdio_err &&
 500                             qeth_check_qdio_errors(card, buffer->buffer,
 501                             card->rx.qdio_err, "qinerr")))
 502                                 work_done += qeth_l2_process_inbound_buffer(
 503                                         card, new_budget, &done);
 504                         else
 505                                 done = 1;
 506
 507                         if (done) {
 508                                 if (card->options.performance_stats)
 509                                         card->perf_stats.bufs_rec++;
 510                                 qeth_put_buffer_pool_entry(card,
 511                                         buffer->pool_entry);
 512                                 qeth_queue_input_buffer(card, card->rx.b_index);
 513                                 card->rx.b_count--;
 514                                 if (card->rx.b_count) {
 515                                         card->rx.b_index =
 516                                                 (card->rx.b_index + 1) %
 517                                                 QDIO_MAX_BUFFERS_PER_Q;
 518                                         card->rx.b_element =
 519                                                 &card->qdio.in_q
 520                                                 ->bufs[card->rx.b_index]
 521                                                 .buffer->element[0];
 522                                         card->rx.e_offset = 0;
 523                                 }
 524                         }
 525
 526                         if (work_done >= budget)
 527                                 goto out;
 528                         else
 529                                 new_budget = budget - work_done;
 530                 }
 531         }
 532
 533         napi_complete(napi);
 534         if (qdio_start_irq(card->data.ccwdev, 0))
 535                 napi_schedule(&card->napi);
 536 out:
 537         if (card->options.performance_stats)
 538                 card->perf_stats.inbound_time += qeth_get_micros() -
 539                         card->perf_stats.inbound_start_time;
 540         return work_done;
 541 }
 542
 543 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
 544                            enum qeth_ipa_cmds ipacmd,
 545                            int (*reply_cb) (struct qeth_card *,
 546                                             struct qeth_reply*,
 547                                             unsigned long))
 548 {
 549         struct qeth_ipa_cmd *cmd;
 550         struct qeth_cmd_buffer *iob;
 551
 552         QETH_CARD_TEXT(card, 2, "L2sdmac");
 553         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 554         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 555         cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
 556         memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
 557         return qeth_send_ipa_cmd(card, iob, reply_cb, NULL);
 558 }
 559
 560 static int qeth_l2_send_setmac_cb(struct qeth_card *card,
 561                            struct qeth_reply *reply,
 562                            unsigned long data)
 563 {
 564         struct qeth_ipa_cmd *cmd;
 565
 566         QETH_CARD_TEXT(card, 2, "L2Smaccb");
 567         cmd = (struct qeth_ipa_cmd *) data;
 568         if (cmd->hdr.return_code) {
 569                 QETH_CARD_TEXT_(card, 2, "L2er%x", cmd->hdr.return_code);
 570                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 571                 switch (cmd->hdr.return_code) {
 572                 case IPA_RC_L2_DUP_MAC:
 573                 case IPA_RC_L2_DUP_LAYER3_MAC:
 574                         dev_warn(&card->gdev->dev,
 575                                 "MAC address %pM already exists\n",
 576                                 card->dev->dev_addr);
 577                         break;
 578                 case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
 579                 case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
 580                         dev_warn(&card->gdev->dev,
 581                                 "MAC address %pM is not authorized\n",
 582                                 card->dev->dev_addr);
 583                         break;
 584                 default:
 585                         break;
 586                 }
 587                 cmd->hdr.return_code = -EIO;
 588         } else {
 589                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 590                 memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
 591                        OSA_ADDR_LEN);
 592                 dev_info(&card->gdev->dev,
 593                         "MAC address %pM successfully registered on device %s\n",
 594                         card->dev->dev_addr, card->dev->name);
 595         }
 596         return 0;
 597 }
 598
 599 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
 600 {
 601         QETH_CARD_TEXT(card, 2, "L2Setmac");
 602         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
 603                                           qeth_l2_send_setmac_cb);
 604 }
 605
 606 static int qeth_l2_send_delmac_cb(struct qeth_card *card,
 607                            struct qeth_reply *reply,
 608                            unsigned long data)
 609 {
 610         struct qeth_ipa_cmd *cmd;
 611
 612         QETH_CARD_TEXT(card, 2, "L2Dmaccb");
 613         cmd = (struct qeth_ipa_cmd *) data;
 614         if (cmd->hdr.return_code) {
 615                 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code);
 616                 cmd->hdr.return_code = -EIO;
 617                 return 0;
 618         }
 619         card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 620
 621         return 0;
 622 }
 623
 624 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
 625 {
 626         QETH_CARD_TEXT(card, 2, "L2Delmac");
 627         if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
 628                 return 0;
 629         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
 630                                           qeth_l2_send_delmac_cb);
 631 }
 632
 633 static int qeth_l2_request_initial_mac(struct qeth_card *card)
 634 {
 635         int rc = 0;
 636         char vendor_pre[] = {0x02, 0x00, 0x00};
 637
 638         QETH_DBF_TEXT(SETUP, 2, "doL2init");
 639         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
 640
 641         rc = qeth_query_setadapterparms(card);
 642         if (rc) {
 643                 QETH_DBF_MESSAGE(2, "could not query adapter parameters on "
 644                         "device %s: x%x\n", CARD_BUS_ID(card), rc);
 645         }
 646
 647         if (card->info.type == QETH_CARD_TYPE_IQD ||
 648             card->info.type == QETH_CARD_TYPE_OSM ||
 649             card->info.type == QETH_CARD_TYPE_OSX ||
 650             card->info.guestlan) {
 651                 rc = qeth_setadpparms_change_macaddr(card);
 652                 if (rc) {
 653                         QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
 654                                 "device %s: x%x\n", CARD_BUS_ID(card), rc);
 655                         QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 656                         return rc;
 657                 }
 658                 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN);
 659         } else {
 660                 random_ether_addr(card->dev->dev_addr);
 661                 memcpy(card->dev->dev_addr, vendor_pre, 3);
 662         }
 663         return 0;
 664 }
 665
 666 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 667 {
 668         struct sockaddr *addr = p;
 669         struct qeth_card *card = dev->ml_priv;
 670         int rc = 0;
 671
 672         QETH_CARD_TEXT(card, 3, "setmac");
 673
 674         if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
 675                 QETH_CARD_TEXT(card, 3, "setmcINV");
 676                 return -EOPNOTSUPP;
 677         }
 678
 679         if (card->info.type == QETH_CARD_TYPE_OSN ||
 680             card->info.type == QETH_CARD_TYPE_OSM ||
 681             card->info.type == QETH_CARD_TYPE_OSX) {
 682                 QETH_CARD_TEXT(card, 3, "setmcTYP");
 683                 return -EOPNOTSUPP;
 684         }
 685         QETH_CARD_HEX(card, 3, addr->sa_data, OSA_ADDR_LEN);
 686         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 687                 QETH_CARD_TEXT(card, 3, "setmcREC");
 688                 return -ERESTARTSYS;
 689         }
 690         rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
 691         if (!rc)
 692                 rc = qeth_l2_send_setmac(card, addr->sa_data);
 693         return rc;
 694 }
 695
 696 static void qeth_l2_set_multicast_list(struct net_device *dev)
 697 {
 698         struct qeth_card *card = dev->ml_priv;
 699         struct netdev_hw_addr *ha;
 700
 701         if (card->info.type == QETH_CARD_TYPE_OSN)
 702                 return ;
 703
 704         QETH_CARD_TEXT(card, 3, "setmulti");
 705         if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
 706             (card->state != CARD_STATE_UP))
 707                 return;
 708         qeth_l2_del_all_mc(card);
 709         spin_lock_bh(&card->mclock);
 710         netdev_for_each_mc_addr(ha, dev)
 711                 qeth_l2_add_mc(card, ha->addr, 0);
 712
 713         netdev_for_each_uc_addr(ha, dev)
 714                 qeth_l2_add_mc(card, ha->addr, 1);
 715
 716         spin_unlock_bh(&card->mclock);
 717         if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
 718                 return;
 719         qeth_setadp_promisc_mode(card);
 720 }
 721
 722 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 723 {
 724         int rc;
 725         struct qeth_hdr *hdr = NULL;
 726         int elements = 0;
 727         struct qeth_card *card = dev->ml_priv;
 728         struct sk_buff *new_skb = skb;
 729         int ipv = qeth_get_ip_version(skb);
 730         int cast_type = qeth_l2_get_cast_type(card, skb);
 731         struct qeth_qdio_out_q *queue = card->qdio.out_qs
 732                 [qeth_get_priority_queue(card, skb, ipv, cast_type)];
 733         int tx_bytes = skb->len;
 734         int data_offset = -1;
 735         int elements_needed = 0;
 736         int hd_len = 0;
 737
 738         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
 739                 card->stats.tx_carrier_errors++;
 740                 goto tx_drop;
 741         }
 742
 743         if ((card->info.type == QETH_CARD_TYPE_OSN) &&
 744             (skb->protocol == htons(ETH_P_IPV6)))
 745                 goto tx_drop;
 746
 747         if (card->options.performance_stats) {
 748                 card->perf_stats.outbound_cnt++;
 749                 card->perf_stats.outbound_start_time = qeth_get_micros();
 750         }
 751         netif_stop_queue(dev);
 752
 753         if (card->info.type == QETH_CARD_TYPE_OSN)
 754                 hdr = (struct qeth_hdr *)skb->data;
 755         else {
 756                 if (card->info.type == QETH_CARD_TYPE_IQD) {
 757                         new_skb = skb;
 758                         data_offset = ETH_HLEN;
 759                         hd_len = ETH_HLEN;
 760                         hdr = kmem_cache_alloc(qeth_core_header_cache,
 761                                                 GFP_ATOMIC);
 762                         if (!hdr)
 763                                 goto tx_drop;
 764                         elements_needed++;
 765                         skb_reset_mac_header(new_skb);
 766                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 767                         hdr->hdr.l2.pkt_length = new_skb->len;
 768                         memcpy(((char *)hdr) + sizeof(struct qeth_hdr),
 769                                 skb_mac_header(new_skb), ETH_HLEN);
 770                 } else {
 771                         /* create a clone with writeable headroom */
 772                         new_skb = skb_realloc_headroom(skb,
 773                                                 sizeof(struct qeth_hdr));
 774                         if (!new_skb)
 775                                 goto tx_drop;
 776                         hdr = (struct qeth_hdr *)skb_push(new_skb,
 777                                                 sizeof(struct qeth_hdr));
 778                         skb_set_mac_header(new_skb, sizeof(struct qeth_hdr));
 779                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 780                 }
 781         }
 782
 783         elements = qeth_get_elements_no(card, (void *)hdr, new_skb,
 784                                                 elements_needed);
 785         if (!elements) {
 786                 if (data_offset >= 0)
 787                         kmem_cache_free(qeth_core_header_cache, hdr);
 788                 goto tx_drop;
 789         }
 790
 791         if (card->info.type != QETH_CARD_TYPE_IQD) {
 792                 if (qeth_hdr_chk_and_bounce(new_skb,
 793                     sizeof(struct qeth_hdr_layer2)))
 794                         goto tx_drop;
 795                 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
 796                                          elements);
 797         } else
 798                 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
 799                                         elements, data_offset, hd_len);
 800         if (!rc) {
 801                 card->stats.tx_packets++;
 802                 card->stats.tx_bytes += tx_bytes;
 803                 if (new_skb != skb)
 804                         dev_kfree_skb_any(skb);
 805                 rc = NETDEV_TX_OK;
 806         } else {
 807                 if (data_offset >= 0)
 808                         kmem_cache_free(qeth_core_header_cache, hdr);
 809
 810                 if (rc == -EBUSY) {
 811                         if (new_skb != skb)
 812                                 dev_kfree_skb_any(new_skb);
 813                         return NETDEV_TX_BUSY;
 814                 } else
 815                         goto tx_drop;
 816         }
 817
 818         netif_wake_queue(dev);
 819         if (card->options.performance_stats)
 820                 card->perf_stats.outbound_time += qeth_get_micros() -
 821                         card->perf_stats.outbound_start_time;
 822         return rc;
 823
 824 tx_drop:
 825         card->stats.tx_dropped++;
 826         card->stats.tx_errors++;
 827         if ((new_skb != skb) && new_skb)
 828                 dev_kfree_skb_any(new_skb);
 829         dev_kfree_skb_any(skb);
 830         netif_wake_queue(dev);
 831         return NETDEV_TX_OK;
 832 }
 833
 834 static int qeth_l2_open(struct net_device *dev)
 835 {
 836         struct qeth_card *card = dev->ml_priv;
 837         int rc = 0;
 838
 839         QETH_CARD_TEXT(card, 4, "qethopen");
 840         if (card->state != CARD_STATE_SOFTSETUP)
 841                 return -ENODEV;
 842
 843         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
 844              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
 845                 QETH_CARD_TEXT(card, 4, "nomacadr");
 846                 return -EPERM;
 847         }
 848         card->data.state = CH_STATE_UP;
 849         card->state = CARD_STATE_UP;
 850         netif_start_queue(dev);
 851
 852         if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) {
 853                 napi_enable(&card->napi);
 854                 napi_schedule(&card->napi);
 855         } else
 856                 rc = -EIO;
 857         return rc;
 858 }
 859
 860 static int qeth_l2_stop(struct net_device *dev)
 861 {
 862         struct qeth_card *card = dev->ml_priv;
 863
 864         QETH_CARD_TEXT(card, 4, "qethstop");
 865         netif_tx_disable(dev);
 866         if (card->state == CARD_STATE_UP) {
 867                 card->state = CARD_STATE_SOFTSETUP;
 868                 napi_disable(&card->napi);
 869         }
 870         return 0;
 871 }
 872
 873 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 874 {
 875         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 876
 877         INIT_LIST_HEAD(&card->vid_list);
 878         INIT_LIST_HEAD(&card->mc_list);
 879         card->options.layer2 = 1;
 880         card->discipline.start_poll = qeth_qdio_start_poll;
 881         card->discipline.input_handler = (qdio_handler_t *)
 882                 qeth_qdio_input_handler;
 883         card->discipline.output_handler = (qdio_handler_t *)
 884                 qeth_qdio_output_handler;
 885         card->discipline.recover = qeth_l2_recover;
 886         return 0;
 887 }
 888
 889 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
 890 {
 891         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
 892
 893         qeth_set_allowed_threads(card, 0, 1);
 894         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 895
 896         if (cgdev->state == CCWGROUP_ONLINE) {
 897                 card->use_hard_stop = 1;
 898                 qeth_l2_set_offline(cgdev);
 899         }
 900
 901         if (card->dev) {
 902                 unregister_netdev(card->dev);
 903                 card->dev = NULL;
 904         }
 905         return;
 906 }
 907
 908 static const struct ethtool_ops qeth_l2_ethtool_ops = {
 909         .get_link = ethtool_op_get_link,
 910         .get_strings = qeth_core_get_strings,
 911         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 912         .get_sset_count = qeth_core_get_sset_count,
 913         .get_drvinfo = qeth_core_get_drvinfo,
 914         .get_settings = qeth_core_ethtool_get_settings,
 915 };
 916
 917 static const struct ethtool_ops qeth_l2_osn_ops = {
 918         .get_strings = qeth_core_get_strings,
 919         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 920         .get_sset_count = qeth_core_get_sset_count,
 921         .get_drvinfo = qeth_core_get_drvinfo,
 922 };
 923
 924 static const struct net_device_ops qeth_l2_netdev_ops = {
 925         .ndo_open               = qeth_l2_open,
 926         .ndo_stop               = qeth_l2_stop,
 927         .ndo_get_stats          = qeth_get_stats,
 928         .ndo_start_xmit         = qeth_l2_hard_start_xmit,
 929         .ndo_validate_addr      = eth_validate_addr,
 930         .ndo_set_multicast_list = qeth_l2_set_multicast_list,
 931         .ndo_do_ioctl           = qeth_l2_do_ioctl,
 932         .ndo_set_mac_address    = qeth_l2_set_mac_address,
 933         .ndo_change_mtu         = qeth_change_mtu,
 934         .ndo_vlan_rx_add_vid    = qeth_l2_vlan_rx_add_vid,
 935         .ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,
 936         .ndo_tx_timeout         = qeth_tx_timeout,
 937 };
 938
 939 static int qeth_l2_setup_netdev(struct qeth_card *card)
 940 {
 941         switch (card->info.type) {
 942         case QETH_CARD_TYPE_IQD:
 943                 card->dev = alloc_netdev(0, "hsi%d", ether_setup);
 944                 break;
 945         case QETH_CARD_TYPE_OSN:
 946                 card->dev = alloc_netdev(0, "osn%d", ether_setup);
 947                 card->dev->flags |= IFF_NOARP;
 948                 break;
 949         default:
 950                 card->dev = alloc_etherdev(0);
 951         }
 952
 953         if (!card->dev)
 954                 return -ENODEV;
 955
 956         card->dev->ml_priv = card;
 957         card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
 958         card->dev->mtu = card->info.initial_mtu;
 959         card->dev->netdev_ops = &qeth_l2_netdev_ops;
 960         if (card->info.type != QETH_CARD_TYPE_OSN)
 961                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops);
 962         else
 963                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops);
 964         card->dev->features |= NETIF_F_HW_VLAN_FILTER;
 965         card->info.broadcast_capable = 1;
 966         qeth_l2_request_initial_mac(card);
 967         SET_NETDEV_DEV(card->dev, &card->gdev->dev);
 968         netif_napi_add(card->dev, &card->napi, qeth_l2_poll, QETH_NAPI_WEIGHT);
 969         return register_netdev(card->dev);
 970 }
 971
 972 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 973 {
 974         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 975         int rc = 0;
 976         enum qeth_card_states recover_flag;
 977
 978         BUG_ON(!card);
 979         mutex_lock(&card->discipline_mutex);
 980         mutex_lock(&card->conf_mutex);
 981         QETH_DBF_TEXT(SETUP, 2, "setonlin");
 982         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 983
 984         recover_flag = card->state;
 985         rc = qeth_core_hardsetup_card(card);
 986         if (rc) {
 987                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
 988                 rc = -ENODEV;
 989                 goto out_remove;
 990         }
 991
 992         if (!card->dev && qeth_l2_setup_netdev(card)) {
 993                 rc = -ENODEV;
 994                 goto out_remove;
 995         }
 996
 997         if (card->info.type != QETH_CARD_TYPE_OSN)
 998                 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
 999
1000         card->state = CARD_STATE_HARDSETUP;
1001         memset(&card->rx, 0, sizeof(struct qeth_rx));
1002         qeth_print_status_message(card);
1003
1004         /* softsetup */
1005         QETH_DBF_TEXT(SETUP, 2, "softsetp");
1006
1007         rc = qeth_send_startlan(card);
1008         if (rc) {
1009                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1010                 if (rc == 0xe080) {
1011                         dev_warn(&card->gdev->dev,
1012                                 "The LAN is offline\n");
1013                         card->lan_online = 0;
1014                         goto contin;
1015                 }
1016                 rc = -ENODEV;
1017                 goto out_remove;
1018         } else
1019                 card->lan_online = 1;
1020
1021 contin:
1022         if ((card->info.type == QETH_CARD_TYPE_OSD) ||
1023             (card->info.type == QETH_CARD_TYPE_OSX))
1024                 /* configure isolation level */
1025                 qeth_set_access_ctrl_online(card);
1026
1027         if (card->info.type != QETH_CARD_TYPE_OSN &&
1028             card->info.type != QETH_CARD_TYPE_OSM)
1029                 qeth_l2_process_vlans(card, 0);
1030
1031         netif_tx_disable(card->dev);
1032
1033         rc = qeth_init_qdio_queues(card);
1034         if (rc) {
1035                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1036                 rc = -ENODEV;
1037                 goto out_remove;
1038         }
1039         card->state = CARD_STATE_SOFTSETUP;
1040         if (card->lan_online)
1041                 netif_carrier_on(card->dev);
1042         else
1043                 netif_carrier_off(card->dev);
1044
1045         qeth_set_allowed_threads(card, 0xffffffff, 0);
1046         if (recover_flag == CARD_STATE_RECOVER) {
1047                 if (recovery_mode &&
1048                     card->info.type != QETH_CARD_TYPE_OSN) {
1049                         qeth_l2_open(card->dev);
1050                 } else {
1051                         rtnl_lock();
1052                         dev_open(card->dev);
1053                         rtnl_unlock();
1054                 }
1055                 /* this also sets saved unicast addresses */
1056                 qeth_l2_set_multicast_list(card->dev);
1057         }
1058         /* let user_space know that device is online */
1059         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1060         mutex_unlock(&card->conf_mutex);
1061         mutex_unlock(&card->discipline_mutex);
1062         return 0;
1063
1064 out_remove:
1065         card->use_hard_stop = 1;
1066         qeth_l2_stop_card(card, 0);
1067         ccw_device_set_offline(CARD_DDEV(card));
1068         ccw_device_set_offline(CARD_WDEV(card));
1069         ccw_device_set_offline(CARD_RDEV(card));
1070         if (recover_flag == CARD_STATE_RECOVER)
1071                 card->state = CARD_STATE_RECOVER;
1072         else
1073                 card->state = CARD_STATE_DOWN;
1074         mutex_unlock(&card->conf_mutex);
1075         mutex_unlock(&card->discipline_mutex);
1076         return rc;
1077 }
1078
1079 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1080 {
1081         return __qeth_l2_set_online(gdev, 0);
1082 }
1083
1084 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1085                                         int recovery_mode)
1086 {
1087         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1088         int rc = 0, rc2 = 0, rc3 = 0;
1089         enum qeth_card_states recover_flag;
1090
1091         mutex_lock(&card->discipline_mutex);
1092         mutex_lock(&card->conf_mutex);
1093         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1094         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1095
1096         if (card->dev && netif_carrier_ok(card->dev))
1097                 netif_carrier_off(card->dev);
1098         recover_flag = card->state;
1099         qeth_l2_stop_card(card, recovery_mode);
1100         rc  = ccw_device_set_offline(CARD_DDEV(card));
1101         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1102         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1103         if (!rc)
1104                 rc = (rc2) ? rc2 : rc3;
1105         if (rc)
1106                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1107         if (recover_flag == CARD_STATE_UP)
1108                 card->state = CARD_STATE_RECOVER;
1109         /* let user_space know that device is offline */
1110         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1111         mutex_unlock(&card->conf_mutex);
1112         mutex_unlock(&card->discipline_mutex);
1113         return 0;
1114 }
1115
1116 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1117 {
1118         return __qeth_l2_set_offline(cgdev, 0);
1119 }
1120
1121 static int qeth_l2_recover(void *ptr)
1122 {
1123         struct qeth_card *card;
1124         int rc = 0;
1125
1126         card = (struct qeth_card *) ptr;
1127         QETH_CARD_TEXT(card, 2, "recover1");
1128         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1129                 return 0;
1130         QETH_CARD_TEXT(card, 2, "recover2");
1131         dev_warn(&card->gdev->dev,
1132                 "A recovery process has been started for the device\n");
1133         card->use_hard_stop = 1;
1134         __qeth_l2_set_offline(card->gdev, 1);
1135         rc = __qeth_l2_set_online(card->gdev, 1);
1136         if (!rc)
1137                 dev_info(&card->gdev->dev,
1138                         "Device successfully recovered!\n");
1139         else {
1140                 rtnl_lock();
1141                 dev_close(card->dev);
1142                 rtnl_unlock();
1143                 dev_warn(&card->gdev->dev, "The qeth device driver "
1144                         "failed to recover an error on the device\n");
1145         }
1146         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1147         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1148         return 0;
1149 }
1150
1151 static int __init qeth_l2_init(void)
1152 {
1153         pr_info("register layer 2 discipline\n");
1154         return 0;
1155 }
1156
1157 static void __exit qeth_l2_exit(void)
1158 {
1159         pr_info("unregister layer 2 discipline\n");
1160 }
1161
1162 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1163 {
1164         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1165         qeth_qdio_clear_card(card, 0);
1166         qeth_clear_qdio_buffers(card);
1167 }
1168
1169 static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev)
1170 {
1171         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1172
1173         if (card->dev)
1174                 netif_device_detach(card->dev);
1175         qeth_set_allowed_threads(card, 0, 1);
1176         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1177         if (gdev->state == CCWGROUP_OFFLINE)
1178                 return 0;
1179         if (card->state == CARD_STATE_UP) {
1180                 card->use_hard_stop = 1;
1181                 __qeth_l2_set_offline(card->gdev, 1);
1182         } else
1183                 __qeth_l2_set_offline(card->gdev, 0);
1184         return 0;
1185 }
1186
1187 static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
1188 {
1189         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1190         int rc = 0;
1191
1192         if (gdev->state == CCWGROUP_OFFLINE)
1193                 goto out;
1194
1195         if (card->state == CARD_STATE_RECOVER) {
1196                 rc = __qeth_l2_set_online(card->gdev, 1);
1197                 if (rc) {
1198                         rtnl_lock();
1199                         dev_close(card->dev);
1200                         rtnl_unlock();
1201                 }
1202         } else
1203                 rc = __qeth_l2_set_online(card->gdev, 0);
1204 out:
1205         qeth_set_allowed_threads(card, 0xffffffff, 0);
1206         if (card->dev)
1207                 netif_device_attach(card->dev);
1208         if (rc)
1209                 dev_warn(&card->gdev->dev, "The qeth device driver "
1210                         "failed to recover an error on the device\n");
1211         return rc;
1212 }
1213
1214 struct ccwgroup_driver qeth_l2_ccwgroup_driver = {
1215         .probe = qeth_l2_probe_device,
1216         .remove = qeth_l2_remove_device,
1217         .set_online = qeth_l2_set_online,
1218         .set_offline = qeth_l2_set_offline,
1219         .shutdown = qeth_l2_shutdown,
1220         .freeze = qeth_l2_pm_suspend,
1221         .thaw = qeth_l2_pm_resume,
1222         .restore = qeth_l2_pm_resume,
1223 };
1224 EXPORT_SYMBOL_GPL(qeth_l2_ccwgroup_driver);
1225
1226 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1227                            struct qeth_cmd_buffer *iob)
1228 {
1229         unsigned long flags;
1230         int rc = 0;
1231
1232         QETH_CARD_TEXT(card, 5, "osndctrd");
1233
1234         wait_event(card->wait_q,
1235                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1236         qeth_prepare_control_data(card, len, iob);
1237         QETH_CARD_TEXT(card, 6, "osnoirqp");
1238         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1239         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1240                               (addr_t) iob, 0, 0);
1241         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1242         if (rc) {
1243                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1244                            "ccw_device_start rc = %i\n", rc);
1245                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1246                 qeth_release_buffer(iob->channel, iob);
1247                 atomic_set(&card->write.irq_pending, 0);
1248                 wake_up(&card->wait_q);
1249         }
1250         return rc;
1251 }
1252
1253 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1254                         struct qeth_cmd_buffer *iob, int data_len)
1255 {
1256         u16 s1, s2;
1257
1258         QETH_CARD_TEXT(card, 4, "osndipa");
1259
1260         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1261         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1262         s2 = (u16)data_len;
1263         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1264         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1265         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1266         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1267         return qeth_osn_send_control_data(card, s1, iob);
1268 }
1269
1270 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1271 {
1272         struct qeth_cmd_buffer *iob;
1273         struct qeth_card *card;
1274         int rc;
1275
1276         if (!dev)
1277                 return -ENODEV;
1278         card = dev->ml_priv;
1279         if (!card)
1280                 return -ENODEV;
1281         QETH_CARD_TEXT(card, 2, "osnsdmc");
1282         if ((card->state != CARD_STATE_UP) &&
1283             (card->state != CARD_STATE_SOFTSETUP))
1284                 return -ENODEV;
1285         iob = qeth_wait_for_buffer(&card->write);
1286         memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1287         rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1288         return rc;
1289 }
1290 EXPORT_SYMBOL(qeth_osn_assist);
1291
1292 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1293                   int (*assist_cb)(struct net_device *, void *),
1294                   int (*data_cb)(struct sk_buff *))
1295 {
1296         struct qeth_card *card;
1297
1298         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1299         if (*dev == NULL)
1300                 return -ENODEV;
1301         card = (*dev)->ml_priv;
1302         if (!card)
1303                 return -ENODEV;
1304         QETH_CARD_TEXT(card, 2, "osnreg");
1305         if ((assist_cb == NULL) || (data_cb == NULL))
1306                 return -EINVAL;
1307         card->osn_info.assist_cb = assist_cb;
1308         card->osn_info.data_cb = data_cb;
1309         return 0;
1310 }
1311 EXPORT_SYMBOL(qeth_osn_register);
1312
1313 void qeth_osn_deregister(struct net_device *dev)
1314 {
1315         struct qeth_card *card;
1316
1317         if (!dev)
1318                 return;
1319         card = dev->ml_priv;
1320         if (!card)
1321                 return;
1322         QETH_CARD_TEXT(card, 2, "osndereg");
1323         card->osn_info.assist_cb = NULL;
1324         card->osn_info.data_cb = NULL;
1325         return;
1326 }
1327 EXPORT_SYMBOL(qeth_osn_deregister);
1328
1329 module_init(qeth_l2_init);
1330 module_exit(qeth_l2_exit);
1331 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1332 MODULE_DESCRIPTION("qeth layer 2 discipline");
1333 MODULE_LICENSE("GPL");