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         case SIOC_QETH_QUERY_OAT:
  79                 rc = qeth_query_oat_command(card, rq->ifr_ifru.ifru_data);
  80                 break;
  81         default:
  82                 rc = -EOPNOTSUPP;
  83         }
  84         if (rc)
  85                 QETH_CARD_TEXT_(card, 2, "ioce%d", rc);
  86         return rc;
  87 }
  88
  89 static int qeth_l2_verify_dev(struct net_device *dev)
  90 {
  91         struct qeth_card *card;
  92         unsigned long flags;
  93         int rc = 0;
  94
  95         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
  96         list_for_each_entry(card, &qeth_core_card_list.list, list) {
  97                 if (card->dev == dev) {
  98                         rc = QETH_REAL_CARD;
  99                         break;
 100                 }
 101         }
 102         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
 103
 104         return rc;
 105 }
 106
 107 static struct net_device *qeth_l2_netdev_by_devno(unsigned char *read_dev_no)
 108 {
 109         struct qeth_card *card;
 110         struct net_device *ndev;
 111         __u16 temp_dev_no;
 112         unsigned long flags;
 113         struct ccw_dev_id read_devid;
 114
 115         ndev = NULL;
 116         memcpy(&temp_dev_no, read_dev_no, 2);
 117         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
 118         list_for_each_entry(card, &qeth_core_card_list.list, list) {
 119                 ccw_device_get_id(CARD_RDEV(card), &read_devid);
 120                 if (read_devid.devno == temp_dev_no) {
 121                         ndev = card->dev;
 122                         break;
 123                 }
 124         }
 125         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
 126         return ndev;
 127 }
 128
 129 static int qeth_l2_send_setgroupmac_cb(struct qeth_card *card,
 130                                 struct qeth_reply *reply,
 131                                 unsigned long data)
 132 {
 133         struct qeth_ipa_cmd *cmd;
 134         __u8 *mac;
 135
 136         QETH_CARD_TEXT(card, 2, "L2Sgmacb");
 137         cmd = (struct qeth_ipa_cmd *) data;
 138         mac = &cmd->data.setdelmac.mac[0];
 139         /* MAC already registered, needed in couple/uncouple case */
 140         if (cmd->hdr.return_code ==  IPA_RC_L2_DUP_MAC) {
 141                 QETH_DBF_MESSAGE(2, "Group MAC %pM already existing on %s \n",
 142                           mac, QETH_CARD_IFNAME(card));
 143                 cmd->hdr.return_code = 0;
 144         }
 145         if (cmd->hdr.return_code)
 146                 QETH_DBF_MESSAGE(2, "Could not set group MAC %pM on %s: %x\n",
 147                           mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 148         return 0;
 149 }
 150
 151 static int qeth_l2_send_setgroupmac(struct qeth_card *card, __u8 *mac)
 152 {
 153         QETH_CARD_TEXT(card, 2, "L2Sgmac");
 154         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETGMAC,
 155                                           qeth_l2_send_setgroupmac_cb);
 156 }
 157
 158 static int qeth_l2_send_delgroupmac_cb(struct qeth_card *card,
 159                                 struct qeth_reply *reply,
 160                                 unsigned long data)
 161 {
 162         struct qeth_ipa_cmd *cmd;
 163         __u8 *mac;
 164
 165         QETH_CARD_TEXT(card, 2, "L2Dgmacb");
 166         cmd = (struct qeth_ipa_cmd *) data;
 167         mac = &cmd->data.setdelmac.mac[0];
 168         if (cmd->hdr.return_code)
 169                 QETH_DBF_MESSAGE(2, "Could not delete group MAC %pM on %s: %x\n",
 170                           mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 171         return 0;
 172 }
 173
 174 static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac)
 175 {
 176         QETH_CARD_TEXT(card, 2, "L2Dgmac");
 177         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELGMAC,
 178                                           qeth_l2_send_delgroupmac_cb);
 179 }
 180
 181 static void qeth_l2_add_mc(struct qeth_card *card, __u8 *mac, int vmac)
 182 {
 183         struct qeth_mc_mac *mc;
 184         int rc;
 185
 186         mc = kmalloc(sizeof(struct qeth_mc_mac), GFP_ATOMIC);
 187
 188         if (!mc)
 189                 return;
 190
 191         memcpy(mc->mc_addr, mac, OSA_ADDR_LEN);
 192         mc->mc_addrlen = OSA_ADDR_LEN;
 193         mc->is_vmac = vmac;
 194
 195         if (vmac) {
 196                 rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
 197                                         NULL);
 198         } else {
 199                 rc = qeth_l2_send_setgroupmac(card, mac);
 200         }
 201
 202         if (!rc)
 203                 list_add_tail(&mc->list, &card->mc_list);
 204         else
 205                 kfree(mc);
 206 }
 207
 208 static void qeth_l2_del_all_mc(struct qeth_card *card, int del)
 209 {
 210         struct qeth_mc_mac *mc, *tmp;
 211
 212         spin_lock_bh(&card->mclock);
 213         list_for_each_entry_safe(mc, tmp, &card->mc_list, list) {
 214                 if (del) {
 215                         if (mc->is_vmac)
 216                                 qeth_l2_send_setdelmac(card, mc->mc_addr,
 217                                         IPA_CMD_DELVMAC, NULL);
 218                         else
 219                                 qeth_l2_send_delgroupmac(card, mc->mc_addr);
 220                 }
 221                 list_del(&mc->list);
 222                 kfree(mc);
 223         }
 224         spin_unlock_bh(&card->mclock);
 225 }
 226
 227 static inline int qeth_l2_get_cast_type(struct qeth_card *card,
 228                         struct sk_buff *skb)
 229 {
 230         if (card->info.type == QETH_CARD_TYPE_OSN)
 231                 return RTN_UNSPEC;
 232         if (is_broadcast_ether_addr(skb->data))
 233                 return RTN_BROADCAST;
 234         if (is_multicast_ether_addr(skb->data))
 235                 return RTN_MULTICAST;
 236         return RTN_UNSPEC;
 237 }
 238
 239 static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
 240                         struct sk_buff *skb, int ipv, int cast_type)
 241 {
 242         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
 243
 244         memset(hdr, 0, sizeof(struct qeth_hdr));
 245         hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
 246
 247         /* set byte byte 3 to casting flags */
 248         if (cast_type == RTN_MULTICAST)
 249                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 250         else if (cast_type == RTN_BROADCAST)
 251                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 252         else
 253                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 254
 255         hdr->hdr.l2.pkt_length = skb->len-QETH_HEADER_SIZE;
 256         /* VSWITCH relies on the VLAN
 257          * information to be present in
 258          * the QDIO header */
 259         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
 260                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
 261                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
 262         }
 263 }
 264
 265 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
 266                         struct qeth_reply *reply, unsigned long data)
 267 {
 268         struct qeth_ipa_cmd *cmd;
 269
 270         QETH_CARD_TEXT(card, 2, "L2sdvcb");
 271         cmd = (struct qeth_ipa_cmd *) data;
 272         if (cmd->hdr.return_code) {
 273                 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x. "
 274                           "Continuing\n", cmd->data.setdelvlan.vlan_id,
 275                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 276                 QETH_CARD_TEXT_(card, 2, "L2VL%4x", cmd->hdr.command);
 277                 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code);
 278         }
 279         return 0;
 280 }
 281
 282 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
 283                                 enum qeth_ipa_cmds ipacmd)
 284 {
 285         struct qeth_ipa_cmd *cmd;
 286         struct qeth_cmd_buffer *iob;
 287
 288         QETH_CARD_TEXT_(card, 4, "L2sdv%x", ipacmd);
 289         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 290         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 291         cmd->data.setdelvlan.vlan_id = i;
 292         return qeth_send_ipa_cmd(card, iob,
 293                                  qeth_l2_send_setdelvlan_cb, NULL);
 294 }
 295
 296 static void qeth_l2_process_vlans(struct qeth_card *card)
 297 {
 298         struct qeth_vlan_vid *id;
 299         QETH_CARD_TEXT(card, 3, "L2prcvln");
 300         spin_lock_bh(&card->vlanlock);
 301         list_for_each_entry(id, &card->vid_list, list) {
 302                 qeth_l2_send_setdelvlan(card, id->vid, IPA_CMD_SETVLAN);
 303         }
 304         spin_unlock_bh(&card->vlanlock);
 305 }
 306
 307 static int 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 0;
 315         if (card->info.type == QETH_CARD_TYPE_OSM) {
 316                 QETH_CARD_TEXT(card, 3, "aidOSM");
 317                 return 0;
 318         }
 319         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 320                 QETH_CARD_TEXT(card, 3, "aidREC");
 321                 return 0;
 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         } else {
 331                 return -ENOMEM;
 332         }
 333         return 0;
 334 }
 335
 336 static int qeth_l2_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
 337 {
 338         struct qeth_vlan_vid *id, *tmpid = NULL;
 339         struct qeth_card *card = dev->ml_priv;
 340
 341         QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
 342         if (card->info.type == QETH_CARD_TYPE_OSM) {
 343                 QETH_CARD_TEXT(card, 3, "kidOSM");
 344                 return 0;
 345         }
 346         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 347                 QETH_CARD_TEXT(card, 3, "kidREC");
 348                 return 0;
 349         }
 350         spin_lock_bh(&card->vlanlock);
 351         list_for_each_entry(id, &card->vid_list, list) {
 352                 if (id->vid == vid) {
 353                         list_del(&id->list);
 354                         tmpid = id;
 355                         break;
 356                 }
 357         }
 358         spin_unlock_bh(&card->vlanlock);
 359         if (tmpid) {
 360                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 361                 kfree(tmpid);
 362         }
 363         qeth_l2_set_multicast_list(card->dev);
 364         return 0;
 365 }
 366
 367 static int qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
 368 {
 369         int rc = 0;
 370
 371         QETH_DBF_TEXT(SETUP , 2, "stopcard");
 372         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 373
 374         qeth_set_allowed_threads(card, 0, 1);
 375         if (card->read.state == CH_STATE_UP &&
 376             card->write.state == CH_STATE_UP &&
 377             (card->state == CARD_STATE_UP)) {
 378                 if (recovery_mode &&
 379                     card->info.type != QETH_CARD_TYPE_OSN) {
 380                         qeth_l2_stop(card->dev);
 381                 } else {
 382                         rtnl_lock();
 383                         dev_close(card->dev);
 384                         rtnl_unlock();
 385                 }
 386                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 387                 card->state = CARD_STATE_SOFTSETUP;
 388         }
 389         if (card->state == CARD_STATE_SOFTSETUP) {
 390                 qeth_l2_del_all_mc(card, 0);
 391                 qeth_clear_ipacmd_list(card);
 392                 card->state = CARD_STATE_HARDSETUP;
 393         }
 394         if (card->state == CARD_STATE_HARDSETUP) {
 395                 qeth_qdio_clear_card(card, 0);
 396                 qeth_clear_qdio_buffers(card);
 397                 qeth_clear_working_pool_list(card);
 398                 card->state = CARD_STATE_DOWN;
 399         }
 400         if (card->state == CARD_STATE_DOWN) {
 401                 qeth_clear_cmd_buffers(&card->read);
 402                 qeth_clear_cmd_buffers(&card->write);
 403         }
 404         return rc;
 405 }
 406
 407 static int qeth_l2_process_inbound_buffer(struct qeth_card *card,
 408                                 int budget, int *done)
 409 {
 410         int work_done = 0;
 411         struct sk_buff *skb;
 412         struct qeth_hdr *hdr;
 413         unsigned int len;
 414
 415         *done = 0;
 416         BUG_ON(!budget);
 417         while (budget) {
 418                 skb = qeth_core_get_next_skb(card,
 419                         &card->qdio.in_q->bufs[card->rx.b_index],
 420                         &card->rx.b_element, &card->rx.e_offset, &hdr);
 421                 if (!skb) {
 422                         *done = 1;
 423                         break;
 424                 }
 425                 skb->dev = card->dev;
 426                 switch (hdr->hdr.l2.id) {
 427                 case QETH_HEADER_TYPE_LAYER2:
 428                         skb->pkt_type = PACKET_HOST;
 429                         skb->protocol = eth_type_trans(skb, skb->dev);
 430                         skb->ip_summed = CHECKSUM_NONE;
 431                         if (skb->protocol == htons(ETH_P_802_2))
 432                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
 433                         len = skb->len;
 434                         netif_receive_skb(skb);
 435                         break;
 436                 case QETH_HEADER_TYPE_OSN:
 437                         if (card->info.type == QETH_CARD_TYPE_OSN) {
 438                                 skb_push(skb, sizeof(struct qeth_hdr));
 439                                 skb_copy_to_linear_data(skb, hdr,
 440                                                 sizeof(struct qeth_hdr));
 441                                 len = skb->len;
 442                                 card->osn_info.data_cb(skb);
 443                                 break;
 444                         }
 445                         /* else unknown */
 446                 default:
 447                         dev_kfree_skb_any(skb);
 448                         QETH_CARD_TEXT(card, 3, "inbunkno");
 449                         QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
 450                         continue;
 451                 }
 452                 work_done++;
 453                 budget--;
 454                 card->stats.rx_packets++;
 455                 card->stats.rx_bytes += len;
 456         }
 457         return work_done;
 458 }
 459
 460 static int qeth_l2_poll(struct napi_struct *napi, int budget)
 461 {
 462         struct qeth_card *card = container_of(napi, struct qeth_card, napi);
 463         int work_done = 0;
 464         struct qeth_qdio_buffer *buffer;
 465         int done;
 466         int new_budget = budget;
 467
 468         if (card->options.performance_stats) {
 469                 card->perf_stats.inbound_cnt++;
 470                 card->perf_stats.inbound_start_time = qeth_get_micros();
 471         }
 472
 473         while (1) {
 474                 if (!card->rx.b_count) {
 475                         card->rx.qdio_err = 0;
 476                         card->rx.b_count = qdio_get_next_buffers(
 477                                 card->data.ccwdev, 0, &card->rx.b_index,
 478                                 &card->rx.qdio_err);
 479                         if (card->rx.b_count <= 0) {
 480                                 card->rx.b_count = 0;
 481                                 break;
 482                         }
 483                         card->rx.b_element =
 484                                 &card->qdio.in_q->bufs[card->rx.b_index]
 485                                 .buffer->element[0];
 486                         card->rx.e_offset = 0;
 487                 }
 488
 489                 while (card->rx.b_count) {
 490                         buffer = &card->qdio.in_q->bufs[card->rx.b_index];
 491                         if (!(card->rx.qdio_err &&
 492                             qeth_check_qdio_errors(card, buffer->buffer,
 493                             card->rx.qdio_err, "qinerr")))
 494                                 work_done += qeth_l2_process_inbound_buffer(
 495                                         card, new_budget, &done);
 496                         else
 497                                 done = 1;
 498
 499                         if (done) {
 500                                 if (card->options.performance_stats)
 501                                         card->perf_stats.bufs_rec++;
 502                                 qeth_put_buffer_pool_entry(card,
 503                                         buffer->pool_entry);
 504                                 qeth_queue_input_buffer(card, card->rx.b_index);
 505                                 card->rx.b_count--;
 506                                 if (card->rx.b_count) {
 507                                         card->rx.b_index =
 508                                                 (card->rx.b_index + 1) %
 509                                                 QDIO_MAX_BUFFERS_PER_Q;
 510                                         card->rx.b_element =
 511                                                 &card->qdio.in_q
 512                                                 ->bufs[card->rx.b_index]
 513                                                 .buffer->element[0];
 514                                         card->rx.e_offset = 0;
 515                                 }
 516                         }
 517
 518                         if (work_done >= budget)
 519                                 goto out;
 520                         else
 521                                 new_budget = budget - work_done;
 522                 }
 523         }
 524
 525         napi_complete(napi);
 526         if (qdio_start_irq(card->data.ccwdev, 0))
 527                 napi_schedule(&card->napi);
 528 out:
 529         if (card->options.performance_stats)
 530                 card->perf_stats.inbound_time += qeth_get_micros() -
 531                         card->perf_stats.inbound_start_time;
 532         return work_done;
 533 }
 534
 535 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
 536                            enum qeth_ipa_cmds ipacmd,
 537                            int (*reply_cb) (struct qeth_card *,
 538                                             struct qeth_reply*,
 539                                             unsigned long))
 540 {
 541         struct qeth_ipa_cmd *cmd;
 542         struct qeth_cmd_buffer *iob;
 543
 544         QETH_CARD_TEXT(card, 2, "L2sdmac");
 545         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 546         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 547         cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
 548         memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
 549         return qeth_send_ipa_cmd(card, iob, reply_cb, NULL);
 550 }
 551
 552 static int qeth_l2_send_setmac_cb(struct qeth_card *card,
 553                            struct qeth_reply *reply,
 554                            unsigned long data)
 555 {
 556         struct qeth_ipa_cmd *cmd;
 557
 558         QETH_CARD_TEXT(card, 2, "L2Smaccb");
 559         cmd = (struct qeth_ipa_cmd *) data;
 560         if (cmd->hdr.return_code) {
 561                 QETH_CARD_TEXT_(card, 2, "L2er%x", cmd->hdr.return_code);
 562                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 563                 switch (cmd->hdr.return_code) {
 564                 case IPA_RC_L2_DUP_MAC:
 565                 case IPA_RC_L2_DUP_LAYER3_MAC:
 566                         dev_warn(&card->gdev->dev,
 567                                 "MAC address %pM already exists\n",
 568                                 cmd->data.setdelmac.mac);
 569                         break;
 570                 case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
 571                 case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
 572                         dev_warn(&card->gdev->dev,
 573                                 "MAC address %pM is not authorized\n",
 574                                 cmd->data.setdelmac.mac);
 575                         break;
 576                 default:
 577                         break;
 578                 }
 579                 cmd->hdr.return_code = -EIO;
 580         } else {
 581                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 582                 memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
 583                        OSA_ADDR_LEN);
 584                 dev_info(&card->gdev->dev,
 585                         "MAC address %pM successfully registered on device %s\n",
 586                         card->dev->dev_addr, card->dev->name);
 587         }
 588         return 0;
 589 }
 590
 591 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
 592 {
 593         QETH_CARD_TEXT(card, 2, "L2Setmac");
 594         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
 595                                           qeth_l2_send_setmac_cb);
 596 }
 597
 598 static int qeth_l2_send_delmac_cb(struct qeth_card *card,
 599                            struct qeth_reply *reply,
 600                            unsigned long data)
 601 {
 602         struct qeth_ipa_cmd *cmd;
 603
 604         QETH_CARD_TEXT(card, 2, "L2Dmaccb");
 605         cmd = (struct qeth_ipa_cmd *) data;
 606         if (cmd->hdr.return_code) {
 607                 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code);
 608                 cmd->hdr.return_code = -EIO;
 609                 return 0;
 610         }
 611         card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 612
 613         return 0;
 614 }
 615
 616 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
 617 {
 618         QETH_CARD_TEXT(card, 2, "L2Delmac");
 619         if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
 620                 return 0;
 621         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
 622                                           qeth_l2_send_delmac_cb);
 623 }
 624
 625 static int qeth_l2_request_initial_mac(struct qeth_card *card)
 626 {
 627         int rc = 0;
 628         char vendor_pre[] = {0x02, 0x00, 0x00};
 629
 630         QETH_DBF_TEXT(SETUP, 2, "doL2init");
 631         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
 632
 633         rc = qeth_query_setadapterparms(card);
 634         if (rc) {
 635                 QETH_DBF_MESSAGE(2, "could not query adapter parameters on "
 636                         "device %s: x%x\n", CARD_BUS_ID(card), rc);
 637         }
 638
 639         if (card->info.type == QETH_CARD_TYPE_IQD ||
 640             card->info.type == QETH_CARD_TYPE_OSM ||
 641             card->info.type == QETH_CARD_TYPE_OSX ||
 642             card->info.guestlan) {
 643                 rc = qeth_setadpparms_change_macaddr(card);
 644                 if (rc) {
 645                         QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
 646                                 "device %s: x%x\n", CARD_BUS_ID(card), rc);
 647                         QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 648                         return rc;
 649                 }
 650                 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN);
 651         } else {
 652                 random_ether_addr(card->dev->dev_addr);
 653                 memcpy(card->dev->dev_addr, vendor_pre, 3);
 654         }
 655         return 0;
 656 }
 657
 658 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 659 {
 660         struct sockaddr *addr = p;
 661         struct qeth_card *card = dev->ml_priv;
 662         int rc = 0;
 663
 664         QETH_CARD_TEXT(card, 3, "setmac");
 665
 666         if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
 667                 QETH_CARD_TEXT(card, 3, "setmcINV");
 668                 return -EOPNOTSUPP;
 669         }
 670
 671         if (card->info.type == QETH_CARD_TYPE_OSN ||
 672             card->info.type == QETH_CARD_TYPE_OSM ||
 673             card->info.type == QETH_CARD_TYPE_OSX) {
 674                 QETH_CARD_TEXT(card, 3, "setmcTYP");
 675                 return -EOPNOTSUPP;
 676         }
 677         QETH_CARD_HEX(card, 3, addr->sa_data, OSA_ADDR_LEN);
 678         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 679                 QETH_CARD_TEXT(card, 3, "setmcREC");
 680                 return -ERESTARTSYS;
 681         }
 682         rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
 683         if (!rc)
 684                 rc = qeth_l2_send_setmac(card, addr->sa_data);
 685         return rc;
 686 }
 687
 688 static void qeth_l2_set_multicast_list(struct net_device *dev)
 689 {
 690         struct qeth_card *card = dev->ml_priv;
 691         struct netdev_hw_addr *ha;
 692
 693         if (card->info.type == QETH_CARD_TYPE_OSN)
 694                 return ;
 695
 696         QETH_CARD_TEXT(card, 3, "setmulti");
 697         if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
 698             (card->state != CARD_STATE_UP))
 699                 return;
 700         qeth_l2_del_all_mc(card, 1);
 701         spin_lock_bh(&card->mclock);
 702         netdev_for_each_mc_addr(ha, dev)
 703                 qeth_l2_add_mc(card, ha->addr, 0);
 704
 705         netdev_for_each_uc_addr(ha, dev)
 706                 qeth_l2_add_mc(card, ha->addr, 1);
 707
 708         spin_unlock_bh(&card->mclock);
 709         if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
 710                 return;
 711         qeth_setadp_promisc_mode(card);
 712 }
 713
 714 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 715 {
 716         int rc;
 717         struct qeth_hdr *hdr = NULL;
 718         int elements = 0;
 719         struct qeth_card *card = dev->ml_priv;
 720         struct sk_buff *new_skb = skb;
 721         int ipv = qeth_get_ip_version(skb);
 722         int cast_type = qeth_l2_get_cast_type(card, skb);
 723         struct qeth_qdio_out_q *queue = card->qdio.out_qs
 724                 [qeth_get_priority_queue(card, skb, ipv, cast_type)];
 725         int tx_bytes = skb->len;
 726         int data_offset = -1;
 727         int elements_needed = 0;
 728         int hd_len = 0;
 729
 730         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
 731                 card->stats.tx_carrier_errors++;
 732                 goto tx_drop;
 733         }
 734
 735         if ((card->info.type == QETH_CARD_TYPE_OSN) &&
 736             (skb->protocol == htons(ETH_P_IPV6)))
 737                 goto tx_drop;
 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 (card->info.type == QETH_CARD_TYPE_OSN)
 746                 hdr = (struct qeth_hdr *)skb->data;
 747         else {
 748                 if (card->info.type == QETH_CARD_TYPE_IQD) {
 749                         new_skb = skb;
 750                         data_offset = ETH_HLEN;
 751                         hd_len = ETH_HLEN;
 752                         hdr = kmem_cache_alloc(qeth_core_header_cache,
 753                                                 GFP_ATOMIC);
 754                         if (!hdr)
 755                                 goto tx_drop;
 756                         elements_needed++;
 757                         skb_reset_mac_header(new_skb);
 758                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 759                         hdr->hdr.l2.pkt_length = new_skb->len;
 760                         memcpy(((char *)hdr) + sizeof(struct qeth_hdr),
 761                                 skb_mac_header(new_skb), ETH_HLEN);
 762                 } else {
 763                         /* create a clone with writeable headroom */
 764                         new_skb = skb_realloc_headroom(skb,
 765                                                 sizeof(struct qeth_hdr));
 766                         if (!new_skb)
 767                                 goto tx_drop;
 768                         hdr = (struct qeth_hdr *)skb_push(new_skb,
 769                                                 sizeof(struct qeth_hdr));
 770                         skb_set_mac_header(new_skb, sizeof(struct qeth_hdr));
 771                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 772                 }
 773         }
 774
 775         elements = qeth_get_elements_no(card, (void *)hdr, new_skb,
 776                                                 elements_needed);
 777         if (!elements) {
 778                 if (data_offset >= 0)
 779                         kmem_cache_free(qeth_core_header_cache, hdr);
 780                 goto tx_drop;
 781         }
 782
 783         if (card->info.type != QETH_CARD_TYPE_IQD) {
 784                 if (qeth_hdr_chk_and_bounce(new_skb,
 785                     sizeof(struct qeth_hdr_layer2)))
 786                         goto tx_drop;
 787                 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
 788                                          elements);
 789         } else
 790                 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
 791                                         elements, data_offset, hd_len);
 792         if (!rc) {
 793                 card->stats.tx_packets++;
 794                 card->stats.tx_bytes += tx_bytes;
 795                 if (new_skb != skb)
 796                         dev_kfree_skb_any(skb);
 797                 rc = NETDEV_TX_OK;
 798         } else {
 799                 if (data_offset >= 0)
 800                         kmem_cache_free(qeth_core_header_cache, hdr);
 801
 802                 if (rc == -EBUSY) {
 803                         if (new_skb != skb)
 804                                 dev_kfree_skb_any(new_skb);
 805                         return NETDEV_TX_BUSY;
 806                 } else
 807                         goto tx_drop;
 808         }
 809
 810         netif_wake_queue(dev);
 811         if (card->options.performance_stats)
 812                 card->perf_stats.outbound_time += qeth_get_micros() -
 813                         card->perf_stats.outbound_start_time;
 814         return rc;
 815
 816 tx_drop:
 817         card->stats.tx_dropped++;
 818         card->stats.tx_errors++;
 819         if ((new_skb != skb) && new_skb)
 820                 dev_kfree_skb_any(new_skb);
 821         dev_kfree_skb_any(skb);
 822         netif_wake_queue(dev);
 823         return NETDEV_TX_OK;
 824 }
 825
 826 static int __qeth_l2_open(struct net_device *dev)
 827 {
 828         struct qeth_card *card = dev->ml_priv;
 829         int rc = 0;
 830
 831         QETH_CARD_TEXT(card, 4, "qethopen");
 832         if (card->state == CARD_STATE_UP)
 833                 return rc;
 834         if (card->state != CARD_STATE_SOFTSETUP)
 835                 return -ENODEV;
 836
 837         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
 838              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
 839                 QETH_CARD_TEXT(card, 4, "nomacadr");
 840                 return -EPERM;
 841         }
 842         card->data.state = CH_STATE_UP;
 843         card->state = CARD_STATE_UP;
 844         netif_start_queue(dev);
 845
 846         if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) {
 847                 napi_enable(&card->napi);
 848                 napi_schedule(&card->napi);
 849         } else
 850                 rc = -EIO;
 851         return rc;
 852 }
 853
 854 static int qeth_l2_open(struct net_device *dev)
 855 {
 856         struct qeth_card *card = dev->ml_priv;
 857
 858         QETH_CARD_TEXT(card, 5, "qethope_");
 859         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 860                 QETH_CARD_TEXT(card, 3, "openREC");
 861                 return -ERESTARTSYS;
 862         }
 863         return __qeth_l2_open(dev);
 864 }
 865
 866 static int qeth_l2_stop(struct net_device *dev)
 867 {
 868         struct qeth_card *card = dev->ml_priv;
 869
 870         QETH_CARD_TEXT(card, 4, "qethstop");
 871         netif_tx_disable(dev);
 872         if (card->state == CARD_STATE_UP) {
 873                 card->state = CARD_STATE_SOFTSETUP;
 874                 napi_disable(&card->napi);
 875         }
 876         return 0;
 877 }
 878
 879 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 880 {
 881         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 882
 883         INIT_LIST_HEAD(&card->vid_list);
 884         INIT_LIST_HEAD(&card->mc_list);
 885         card->options.layer2 = 1;
 886         card->info.hwtrap = 0;
 887         card->discipline.start_poll = qeth_qdio_start_poll;
 888         card->discipline.input_handler = (qdio_handler_t *)
 889                 qeth_qdio_input_handler;
 890         card->discipline.output_handler = (qdio_handler_t *)
 891                 qeth_qdio_output_handler;
 892         card->discipline.recover = qeth_l2_recover;
 893         return 0;
 894 }
 895
 896 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
 897 {
 898         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
 899
 900         qeth_set_allowed_threads(card, 0, 1);
 901         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 902
 903         if (cgdev->state == CCWGROUP_ONLINE)
 904                 qeth_l2_set_offline(cgdev);
 905
 906         if (card->dev) {
 907                 unregister_netdev(card->dev);
 908                 card->dev = NULL;
 909         }
 910         return;
 911 }
 912
 913 static const struct ethtool_ops qeth_l2_ethtool_ops = {
 914         .get_link = ethtool_op_get_link,
 915         .get_strings = qeth_core_get_strings,
 916         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 917         .get_sset_count = qeth_core_get_sset_count,
 918         .get_drvinfo = qeth_core_get_drvinfo,
 919         .get_settings = qeth_core_ethtool_get_settings,
 920 };
 921
 922 static const struct ethtool_ops qeth_l2_osn_ops = {
 923         .get_strings = qeth_core_get_strings,
 924         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 925         .get_sset_count = qeth_core_get_sset_count,
 926         .get_drvinfo = qeth_core_get_drvinfo,
 927 };
 928
 929 static const struct net_device_ops qeth_l2_netdev_ops = {
 930         .ndo_open               = qeth_l2_open,
 931         .ndo_stop               = qeth_l2_stop,
 932         .ndo_get_stats          = qeth_get_stats,
 933         .ndo_start_xmit         = qeth_l2_hard_start_xmit,
 934         .ndo_validate_addr      = eth_validate_addr,
 935         .ndo_set_rx_mode        = qeth_l2_set_multicast_list,
 936         .ndo_do_ioctl           = qeth_l2_do_ioctl,
 937         .ndo_set_mac_address    = qeth_l2_set_mac_address,
 938         .ndo_change_mtu         = qeth_change_mtu,
 939         .ndo_vlan_rx_add_vid    = qeth_l2_vlan_rx_add_vid,
 940         .ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,
 941         .ndo_tx_timeout         = qeth_tx_timeout,
 942 };
 943
 944 static int qeth_l2_setup_netdev(struct qeth_card *card)
 945 {
 946         switch (card->info.type) {
 947         case QETH_CARD_TYPE_IQD:
 948                 card->dev = alloc_netdev(0, "hsi%d", ether_setup);
 949                 break;
 950         case QETH_CARD_TYPE_OSN:
 951                 card->dev = alloc_netdev(0, "osn%d", ether_setup);
 952                 card->dev->flags |= IFF_NOARP;
 953                 break;
 954         default:
 955                 card->dev = alloc_etherdev(0);
 956         }
 957
 958         if (!card->dev)
 959                 return -ENODEV;
 960
 961         card->dev->ml_priv = card;
 962         card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
 963         card->dev->mtu = card->info.initial_mtu;
 964         card->dev->netdev_ops = &qeth_l2_netdev_ops;
 965         if (card->info.type != QETH_CARD_TYPE_OSN)
 966                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops);
 967         else
 968                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops);
 969         card->dev->features |= NETIF_F_HW_VLAN_FILTER;
 970         card->info.broadcast_capable = 1;
 971         qeth_l2_request_initial_mac(card);
 972         SET_NETDEV_DEV(card->dev, &card->gdev->dev);
 973         netif_napi_add(card->dev, &card->napi, qeth_l2_poll, QETH_NAPI_WEIGHT);
 974         return register_netdev(card->dev);
 975 }
 976
 977 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 978 {
 979         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 980         int rc = 0;
 981         enum qeth_card_states recover_flag;
 982
 983         BUG_ON(!card);
 984         mutex_lock(&card->discipline_mutex);
 985         mutex_lock(&card->conf_mutex);
 986         QETH_DBF_TEXT(SETUP, 2, "setonlin");
 987         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 988
 989         recover_flag = card->state;
 990         rc = qeth_core_hardsetup_card(card);
 991         if (rc) {
 992                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
 993                 rc = -ENODEV;
 994                 goto out_remove;
 995         }
 996
 997         if (!card->dev && qeth_l2_setup_netdev(card)) {
 998                 rc = -ENODEV;
 999                 goto out_remove;
1000         }
1001
1002         if (card->info.type != QETH_CARD_TYPE_OSN)
1003                 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
1004
1005         if (qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP)) {
1006                 if (card->info.hwtrap &&
1007                     qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM))
1008                         card->info.hwtrap = 0;
1009         } else
1010                 card->info.hwtrap = 0;
1011
1012         card->state = CARD_STATE_HARDSETUP;
1013         memset(&card->rx, 0, sizeof(struct qeth_rx));
1014         qeth_print_status_message(card);
1015
1016         /* softsetup */
1017         QETH_DBF_TEXT(SETUP, 2, "softsetp");
1018
1019         rc = qeth_send_startlan(card);
1020         if (rc) {
1021                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1022                 if (rc == 0xe080) {
1023                         dev_warn(&card->gdev->dev,
1024                                 "The LAN is offline\n");
1025                         card->lan_online = 0;
1026                         goto contin;
1027                 }
1028                 rc = -ENODEV;
1029                 goto out_remove;
1030         } else
1031                 card->lan_online = 1;
1032
1033 contin:
1034         if ((card->info.type == QETH_CARD_TYPE_OSD) ||
1035             (card->info.type == QETH_CARD_TYPE_OSX))
1036                 /* configure isolation level */
1037                 qeth_set_access_ctrl_online(card);
1038
1039         if (card->info.type != QETH_CARD_TYPE_OSN &&
1040             card->info.type != QETH_CARD_TYPE_OSM)
1041                 qeth_l2_process_vlans(card);
1042
1043         netif_tx_disable(card->dev);
1044
1045         rc = qeth_init_qdio_queues(card);
1046         if (rc) {
1047                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1048                 rc = -ENODEV;
1049                 goto out_remove;
1050         }
1051         card->state = CARD_STATE_SOFTSETUP;
1052         if (card->lan_online)
1053                 netif_carrier_on(card->dev);
1054         else
1055                 netif_carrier_off(card->dev);
1056
1057         qeth_set_allowed_threads(card, 0xffffffff, 0);
1058         if (recover_flag == CARD_STATE_RECOVER) {
1059                 if (recovery_mode &&
1060                     card->info.type != QETH_CARD_TYPE_OSN) {
1061                         __qeth_l2_open(card->dev);
1062                 } else {
1063                         rtnl_lock();
1064                         dev_open(card->dev);
1065                         rtnl_unlock();
1066                 }
1067                 /* this also sets saved unicast addresses */
1068                 qeth_l2_set_multicast_list(card->dev);
1069         }
1070         /* let user_space know that device is online */
1071         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1072         mutex_unlock(&card->conf_mutex);
1073         mutex_unlock(&card->discipline_mutex);
1074         return 0;
1075
1076 out_remove:
1077         qeth_l2_stop_card(card, 0);
1078         ccw_device_set_offline(CARD_DDEV(card));
1079         ccw_device_set_offline(CARD_WDEV(card));
1080         ccw_device_set_offline(CARD_RDEV(card));
1081         if (recover_flag == CARD_STATE_RECOVER)
1082                 card->state = CARD_STATE_RECOVER;
1083         else
1084                 card->state = CARD_STATE_DOWN;
1085         mutex_unlock(&card->conf_mutex);
1086         mutex_unlock(&card->discipline_mutex);
1087         return rc;
1088 }
1089
1090 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1091 {
1092         return __qeth_l2_set_online(gdev, 0);
1093 }
1094
1095 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1096                                         int recovery_mode)
1097 {
1098         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1099         int rc = 0, rc2 = 0, rc3 = 0;
1100         enum qeth_card_states recover_flag;
1101
1102         mutex_lock(&card->discipline_mutex);
1103         mutex_lock(&card->conf_mutex);
1104         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1105         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1106
1107         if (card->dev && netif_carrier_ok(card->dev))
1108                 netif_carrier_off(card->dev);
1109         recover_flag = card->state;
1110         if ((!recovery_mode && card->info.hwtrap) || card->info.hwtrap == 2) {
1111                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1112                 card->info.hwtrap = 1;
1113         }
1114         qeth_l2_stop_card(card, recovery_mode);
1115         rc  = ccw_device_set_offline(CARD_DDEV(card));
1116         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1117         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1118         if (!rc)
1119                 rc = (rc2) ? rc2 : rc3;
1120         if (rc)
1121                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1122         if (recover_flag == CARD_STATE_UP)
1123                 card->state = CARD_STATE_RECOVER;
1124         /* let user_space know that device is offline */
1125         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1126         mutex_unlock(&card->conf_mutex);
1127         mutex_unlock(&card->discipline_mutex);
1128         return 0;
1129 }
1130
1131 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1132 {
1133         return __qeth_l2_set_offline(cgdev, 0);
1134 }
1135
1136 static int qeth_l2_recover(void *ptr)
1137 {
1138         struct qeth_card *card;
1139         int rc = 0;
1140
1141         card = (struct qeth_card *) ptr;
1142         QETH_CARD_TEXT(card, 2, "recover1");
1143         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1144                 return 0;
1145         QETH_CARD_TEXT(card, 2, "recover2");
1146         dev_warn(&card->gdev->dev,
1147                 "A recovery process has been started for the device\n");
1148         __qeth_l2_set_offline(card->gdev, 1);
1149         rc = __qeth_l2_set_online(card->gdev, 1);
1150         if (!rc)
1151                 dev_info(&card->gdev->dev,
1152                         "Device successfully recovered!\n");
1153         else {
1154                 rtnl_lock();
1155                 dev_close(card->dev);
1156                 rtnl_unlock();
1157                 dev_warn(&card->gdev->dev, "The qeth device driver "
1158                         "failed to recover an error on the device\n");
1159         }
1160         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1161         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1162         return 0;
1163 }
1164
1165 static int __init qeth_l2_init(void)
1166 {
1167         pr_info("register layer 2 discipline\n");
1168         return 0;
1169 }
1170
1171 static void __exit qeth_l2_exit(void)
1172 {
1173         pr_info("unregister layer 2 discipline\n");
1174 }
1175
1176 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1177 {
1178         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1179         qeth_set_allowed_threads(card, 0, 1);
1180         if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
1181                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1182         qeth_qdio_clear_card(card, 0);
1183         qeth_clear_qdio_buffers(card);
1184 }
1185
1186 static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev)
1187 {
1188         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1189
1190         if (card->dev)
1191                 netif_device_detach(card->dev);
1192         qeth_set_allowed_threads(card, 0, 1);
1193         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1194         if (gdev->state == CCWGROUP_OFFLINE)
1195                 return 0;
1196         if (card->state == CARD_STATE_UP) {
1197                 if (card->info.hwtrap)
1198                         qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1199                 __qeth_l2_set_offline(card->gdev, 1);
1200         } else
1201                 __qeth_l2_set_offline(card->gdev, 0);
1202         return 0;
1203 }
1204
1205 static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
1206 {
1207         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1208         int rc = 0;
1209
1210         if (gdev->state == CCWGROUP_OFFLINE)
1211                 goto out;
1212
1213         if (card->state == CARD_STATE_RECOVER) {
1214                 rc = __qeth_l2_set_online(card->gdev, 1);
1215                 if (rc) {
1216                         rtnl_lock();
1217                         dev_close(card->dev);
1218                         rtnl_unlock();
1219                 }
1220         } else
1221                 rc = __qeth_l2_set_online(card->gdev, 0);
1222 out:
1223         qeth_set_allowed_threads(card, 0xffffffff, 0);
1224         if (card->dev)
1225                 netif_device_attach(card->dev);
1226         if (rc)
1227                 dev_warn(&card->gdev->dev, "The qeth device driver "
1228                         "failed to recover an error on the device\n");
1229         return rc;
1230 }
1231
1232 struct ccwgroup_driver qeth_l2_ccwgroup_driver = {
1233         .probe = qeth_l2_probe_device,
1234         .remove = qeth_l2_remove_device,
1235         .set_online = qeth_l2_set_online,
1236         .set_offline = qeth_l2_set_offline,
1237         .shutdown = qeth_l2_shutdown,
1238         .freeze = qeth_l2_pm_suspend,
1239         .thaw = qeth_l2_pm_resume,
1240         .restore = qeth_l2_pm_resume,
1241 };
1242 EXPORT_SYMBOL_GPL(qeth_l2_ccwgroup_driver);
1243
1244 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1245                            struct qeth_cmd_buffer *iob)
1246 {
1247         unsigned long flags;
1248         int rc = 0;
1249
1250         QETH_CARD_TEXT(card, 5, "osndctrd");
1251
1252         wait_event(card->wait_q,
1253                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1254         qeth_prepare_control_data(card, len, iob);
1255         QETH_CARD_TEXT(card, 6, "osnoirqp");
1256         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1257         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1258                               (addr_t) iob, 0, 0);
1259         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1260         if (rc) {
1261                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1262                            "ccw_device_start rc = %i\n", rc);
1263                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1264                 qeth_release_buffer(iob->channel, iob);
1265                 atomic_set(&card->write.irq_pending, 0);
1266                 wake_up(&card->wait_q);
1267         }
1268         return rc;
1269 }
1270
1271 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1272                         struct qeth_cmd_buffer *iob, int data_len)
1273 {
1274         u16 s1, s2;
1275
1276         QETH_CARD_TEXT(card, 4, "osndipa");
1277
1278         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1279         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1280         s2 = (u16)data_len;
1281         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1282         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1283         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1284         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1285         return qeth_osn_send_control_data(card, s1, iob);
1286 }
1287
1288 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1289 {
1290         struct qeth_cmd_buffer *iob;
1291         struct qeth_card *card;
1292         int rc;
1293
1294         if (!dev)
1295                 return -ENODEV;
1296         card = dev->ml_priv;
1297         if (!card)
1298                 return -ENODEV;
1299         QETH_CARD_TEXT(card, 2, "osnsdmc");
1300         if ((card->state != CARD_STATE_UP) &&
1301             (card->state != CARD_STATE_SOFTSETUP))
1302                 return -ENODEV;
1303         iob = qeth_wait_for_buffer(&card->write);
1304         memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1305         rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1306         return rc;
1307 }
1308 EXPORT_SYMBOL(qeth_osn_assist);
1309
1310 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1311                   int (*assist_cb)(struct net_device *, void *),
1312                   int (*data_cb)(struct sk_buff *))
1313 {
1314         struct qeth_card *card;
1315
1316         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1317         if (*dev == NULL)
1318                 return -ENODEV;
1319         card = (*dev)->ml_priv;
1320         if (!card)
1321                 return -ENODEV;
1322         QETH_CARD_TEXT(card, 2, "osnreg");
1323         if ((assist_cb == NULL) || (data_cb == NULL))
1324                 return -EINVAL;
1325         card->osn_info.assist_cb = assist_cb;
1326         card->osn_info.data_cb = data_cb;
1327         return 0;
1328 }
1329 EXPORT_SYMBOL(qeth_osn_register);
1330
1331 void qeth_osn_deregister(struct net_device *dev)
1332 {
1333         struct qeth_card *card;
1334
1335         if (!dev)
1336                 return;
1337         card = dev->ml_priv;
1338         if (!card)
1339                 return;
1340         QETH_CARD_TEXT(card, 2, "osndereg");
1341         card->osn_info.assist_cb = NULL;
1342         card->osn_info.data_cb = NULL;
1343         return;
1344 }
1345 EXPORT_SYMBOL(qeth_osn_deregister);
1346
1347 module_init(qeth_l2_init);
1348 module_exit(qeth_l2_exit);
1349 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1350 MODULE_DESCRIPTION("qeth layer 2 discipline");
1351 MODULE_LICENSE("GPL");