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         } else {
 580                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 581                 memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
 582                        OSA_ADDR_LEN);
 583                 dev_info(&card->gdev->dev,
 584                         "MAC address %pM successfully registered on device %s\n",
 585                         card->dev->dev_addr, card->dev->name);
 586         }
 587         return 0;
 588 }
 589
 590 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
 591 {
 592         QETH_CARD_TEXT(card, 2, "L2Setmac");
 593         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
 594                                           qeth_l2_send_setmac_cb);
 595 }
 596
 597 static int qeth_l2_send_delmac_cb(struct qeth_card *card,
 598                            struct qeth_reply *reply,
 599                            unsigned long data)
 600 {
 601         struct qeth_ipa_cmd *cmd;
 602
 603         QETH_CARD_TEXT(card, 2, "L2Dmaccb");
 604         cmd = (struct qeth_ipa_cmd *) data;
 605         if (cmd->hdr.return_code) {
 606                 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code);
 607                 return 0;
 608         }
 609         card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 610
 611         return 0;
 612 }
 613
 614 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
 615 {
 616         QETH_CARD_TEXT(card, 2, "L2Delmac");
 617         if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
 618                 return 0;
 619         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
 620                                           qeth_l2_send_delmac_cb);
 621 }
 622
 623 static int qeth_l2_request_initial_mac(struct qeth_card *card)
 624 {
 625         int rc = 0;
 626         char vendor_pre[] = {0x02, 0x00, 0x00};
 627
 628         QETH_DBF_TEXT(SETUP, 2, "doL2init");
 629         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
 630
 631         rc = qeth_query_setadapterparms(card);
 632         if (rc) {
 633                 QETH_DBF_MESSAGE(2, "could not query adapter parameters on "
 634                         "device %s: x%x\n", CARD_BUS_ID(card), rc);
 635         }
 636
 637         if (card->info.type == QETH_CARD_TYPE_IQD ||
 638             card->info.type == QETH_CARD_TYPE_OSM ||
 639             card->info.type == QETH_CARD_TYPE_OSX ||
 640             card->info.guestlan) {
 641                 rc = qeth_setadpparms_change_macaddr(card);
 642                 if (rc) {
 643                         QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
 644                                 "device %s: x%x\n", CARD_BUS_ID(card), rc);
 645                         QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 646                         return rc;
 647                 }
 648                 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN);
 649         } else {
 650                 random_ether_addr(card->dev->dev_addr);
 651                 memcpy(card->dev->dev_addr, vendor_pre, 3);
 652         }
 653         return 0;
 654 }
 655
 656 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 657 {
 658         struct sockaddr *addr = p;
 659         struct qeth_card *card = dev->ml_priv;
 660         int rc = 0;
 661
 662         QETH_CARD_TEXT(card, 3, "setmac");
 663
 664         if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
 665                 QETH_CARD_TEXT(card, 3, "setmcINV");
 666                 return -EOPNOTSUPP;
 667         }
 668
 669         if (card->info.type == QETH_CARD_TYPE_OSN ||
 670             card->info.type == QETH_CARD_TYPE_OSM ||
 671             card->info.type == QETH_CARD_TYPE_OSX) {
 672                 QETH_CARD_TEXT(card, 3, "setmcTYP");
 673                 return -EOPNOTSUPP;
 674         }
 675         QETH_CARD_HEX(card, 3, addr->sa_data, OSA_ADDR_LEN);
 676         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 677                 QETH_CARD_TEXT(card, 3, "setmcREC");
 678                 return -ERESTARTSYS;
 679         }
 680         rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
 681         if (!rc)
 682                 rc = qeth_l2_send_setmac(card, addr->sa_data);
 683         return rc ? -EINVAL : 0;
 684 }
 685
 686 static void qeth_l2_set_multicast_list(struct net_device *dev)
 687 {
 688         struct qeth_card *card = dev->ml_priv;
 689         struct netdev_hw_addr *ha;
 690
 691         if (card->info.type == QETH_CARD_TYPE_OSN)
 692                 return ;
 693
 694         QETH_CARD_TEXT(card, 3, "setmulti");
 695         if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
 696             (card->state != CARD_STATE_UP))
 697                 return;
 698         qeth_l2_del_all_mc(card, 1);
 699         spin_lock_bh(&card->mclock);
 700         netdev_for_each_mc_addr(ha, dev)
 701                 qeth_l2_add_mc(card, ha->addr, 0);
 702
 703         netdev_for_each_uc_addr(ha, dev)
 704                 qeth_l2_add_mc(card, ha->addr, 1);
 705
 706         spin_unlock_bh(&card->mclock);
 707         if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
 708                 return;
 709         qeth_setadp_promisc_mode(card);
 710 }
 711
 712 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 713 {
 714         int rc;
 715         struct qeth_hdr *hdr = NULL;
 716         int elements = 0;
 717         struct qeth_card *card = dev->ml_priv;
 718         struct sk_buff *new_skb = skb;
 719         int ipv = qeth_get_ip_version(skb);
 720         int cast_type = qeth_l2_get_cast_type(card, skb);
 721         struct qeth_qdio_out_q *queue = card->qdio.out_qs
 722                 [qeth_get_priority_queue(card, skb, ipv, cast_type)];
 723         int tx_bytes = skb->len;
 724         int data_offset = -1;
 725         int elements_needed = 0;
 726         int hd_len = 0;
 727
 728         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
 729                 card->stats.tx_carrier_errors++;
 730                 goto tx_drop;
 731         }
 732
 733         if ((card->info.type == QETH_CARD_TYPE_OSN) &&
 734             (skb->protocol == htons(ETH_P_IPV6)))
 735                 goto tx_drop;
 736
 737         if (card->options.performance_stats) {
 738                 card->perf_stats.outbound_cnt++;
 739                 card->perf_stats.outbound_start_time = qeth_get_micros();
 740         }
 741         netif_stop_queue(dev);
 742
 743         if (card->info.type == QETH_CARD_TYPE_OSN)
 744                 hdr = (struct qeth_hdr *)skb->data;
 745         else {
 746                 if (card->info.type == QETH_CARD_TYPE_IQD) {
 747                         new_skb = skb;
 748                         data_offset = ETH_HLEN;
 749                         hd_len = ETH_HLEN;
 750                         hdr = kmem_cache_alloc(qeth_core_header_cache,
 751                                                 GFP_ATOMIC);
 752                         if (!hdr)
 753                                 goto tx_drop;
 754                         elements_needed++;
 755                         skb_reset_mac_header(new_skb);
 756                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 757                         hdr->hdr.l2.pkt_length = new_skb->len;
 758                         memcpy(((char *)hdr) + sizeof(struct qeth_hdr),
 759                                 skb_mac_header(new_skb), ETH_HLEN);
 760                 } else {
 761                         /* create a clone with writeable headroom */
 762                         new_skb = skb_realloc_headroom(skb,
 763                                                 sizeof(struct qeth_hdr));
 764                         if (!new_skb)
 765                                 goto tx_drop;
 766                         hdr = (struct qeth_hdr *)skb_push(new_skb,
 767                                                 sizeof(struct qeth_hdr));
 768                         skb_set_mac_header(new_skb, sizeof(struct qeth_hdr));
 769                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 770                 }
 771         }
 772
 773         elements = qeth_get_elements_no(card, (void *)hdr, new_skb,
 774                                                 elements_needed);
 775         if (!elements) {
 776                 if (data_offset >= 0)
 777                         kmem_cache_free(qeth_core_header_cache, hdr);
 778                 goto tx_drop;
 779         }
 780
 781         if (card->info.type != QETH_CARD_TYPE_IQD) {
 782                 if (qeth_hdr_chk_and_bounce(new_skb,
 783                     sizeof(struct qeth_hdr_layer2)))
 784                         goto tx_drop;
 785                 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
 786                                          elements);
 787         } else
 788                 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
 789                                         elements, data_offset, hd_len);
 790         if (!rc) {
 791                 card->stats.tx_packets++;
 792                 card->stats.tx_bytes += tx_bytes;
 793                 if (new_skb != skb)
 794                         dev_kfree_skb_any(skb);
 795                 rc = NETDEV_TX_OK;
 796         } else {
 797                 if (data_offset >= 0)
 798                         kmem_cache_free(qeth_core_header_cache, hdr);
 799
 800                 if (rc == -EBUSY) {
 801                         if (new_skb != skb)
 802                                 dev_kfree_skb_any(new_skb);
 803                         return NETDEV_TX_BUSY;
 804                 } else
 805                         goto tx_drop;
 806         }
 807
 808         netif_wake_queue(dev);
 809         if (card->options.performance_stats)
 810                 card->perf_stats.outbound_time += qeth_get_micros() -
 811                         card->perf_stats.outbound_start_time;
 812         return rc;
 813
 814 tx_drop:
 815         card->stats.tx_dropped++;
 816         card->stats.tx_errors++;
 817         if ((new_skb != skb) && new_skb)
 818                 dev_kfree_skb_any(new_skb);
 819         dev_kfree_skb_any(skb);
 820         netif_wake_queue(dev);
 821         return NETDEV_TX_OK;
 822 }
 823
 824 static int __qeth_l2_open(struct net_device *dev)
 825 {
 826         struct qeth_card *card = dev->ml_priv;
 827         int rc = 0;
 828
 829         QETH_CARD_TEXT(card, 4, "qethopen");
 830         if (card->state == CARD_STATE_UP)
 831                 return rc;
 832         if (card->state != CARD_STATE_SOFTSETUP)
 833                 return -ENODEV;
 834
 835         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
 836              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
 837                 QETH_CARD_TEXT(card, 4, "nomacadr");
 838                 return -EPERM;
 839         }
 840         card->data.state = CH_STATE_UP;
 841         card->state = CARD_STATE_UP;
 842         netif_start_queue(dev);
 843
 844         if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) {
 845                 napi_enable(&card->napi);
 846                 napi_schedule(&card->napi);
 847         } else
 848                 rc = -EIO;
 849         return rc;
 850 }
 851
 852 static int qeth_l2_open(struct net_device *dev)
 853 {
 854         struct qeth_card *card = dev->ml_priv;
 855
 856         QETH_CARD_TEXT(card, 5, "qethope_");
 857         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 858                 QETH_CARD_TEXT(card, 3, "openREC");
 859                 return -ERESTARTSYS;
 860         }
 861         return __qeth_l2_open(dev);
 862 }
 863
 864 static int qeth_l2_stop(struct net_device *dev)
 865 {
 866         struct qeth_card *card = dev->ml_priv;
 867
 868         QETH_CARD_TEXT(card, 4, "qethstop");
 869         netif_tx_disable(dev);
 870         if (card->state == CARD_STATE_UP) {
 871                 card->state = CARD_STATE_SOFTSETUP;
 872                 napi_disable(&card->napi);
 873         }
 874         return 0;
 875 }
 876
 877 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 878 {
 879         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 880
 881         INIT_LIST_HEAD(&card->vid_list);
 882         INIT_LIST_HEAD(&card->mc_list);
 883         card->options.layer2 = 1;
 884         card->info.hwtrap = 0;
 885         return 0;
 886 }
 887
 888 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
 889 {
 890         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
 891
 892         qeth_set_allowed_threads(card, 0, 1);
 893         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 894
 895         if (cgdev->state == CCWGROUP_ONLINE)
 896                 qeth_l2_set_offline(cgdev);
 897
 898         if (card->dev) {
 899                 unregister_netdev(card->dev);
 900                 card->dev = NULL;
 901         }
 902         return;
 903 }
 904
 905 static const struct ethtool_ops qeth_l2_ethtool_ops = {
 906         .get_link = ethtool_op_get_link,
 907         .get_strings = qeth_core_get_strings,
 908         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 909         .get_sset_count = qeth_core_get_sset_count,
 910         .get_drvinfo = qeth_core_get_drvinfo,
 911         .get_settings = qeth_core_ethtool_get_settings,
 912 };
 913
 914 static const struct ethtool_ops qeth_l2_osn_ops = {
 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 };
 920
 921 static const struct net_device_ops qeth_l2_netdev_ops = {
 922         .ndo_open               = qeth_l2_open,
 923         .ndo_stop               = qeth_l2_stop,
 924         .ndo_get_stats          = qeth_get_stats,
 925         .ndo_start_xmit         = qeth_l2_hard_start_xmit,
 926         .ndo_validate_addr      = eth_validate_addr,
 927         .ndo_set_rx_mode        = qeth_l2_set_multicast_list,
 928         .ndo_do_ioctl           = qeth_l2_do_ioctl,
 929         .ndo_set_mac_address    = qeth_l2_set_mac_address,
 930         .ndo_change_mtu         = qeth_change_mtu,
 931         .ndo_vlan_rx_add_vid    = qeth_l2_vlan_rx_add_vid,
 932         .ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,
 933         .ndo_tx_timeout         = qeth_tx_timeout,
 934 };
 935
 936 static int qeth_l2_setup_netdev(struct qeth_card *card)
 937 {
 938         switch (card->info.type) {
 939         case QETH_CARD_TYPE_IQD:
 940                 card->dev = alloc_netdev(0, "hsi%d", ether_setup);
 941                 break;
 942         case QETH_CARD_TYPE_OSN:
 943                 card->dev = alloc_netdev(0, "osn%d", ether_setup);
 944                 card->dev->flags |= IFF_NOARP;
 945                 break;
 946         default:
 947                 card->dev = alloc_etherdev(0);
 948         }
 949
 950         if (!card->dev)
 951                 return -ENODEV;
 952
 953         card->dev->ml_priv = card;
 954         card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
 955         card->dev->mtu = card->info.initial_mtu;
 956         card->dev->netdev_ops = &qeth_l2_netdev_ops;
 957         if (card->info.type != QETH_CARD_TYPE_OSN)
 958                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops);
 959         else
 960                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops);
 961         card->dev->features |= NETIF_F_HW_VLAN_FILTER;
 962         card->info.broadcast_capable = 1;
 963         qeth_l2_request_initial_mac(card);
 964         SET_NETDEV_DEV(card->dev, &card->gdev->dev);
 965         netif_napi_add(card->dev, &card->napi, qeth_l2_poll, QETH_NAPI_WEIGHT);
 966         return register_netdev(card->dev);
 967 }
 968
 969 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 970 {
 971         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 972         int rc = 0;
 973         enum qeth_card_states recover_flag;
 974
 975         BUG_ON(!card);
 976         mutex_lock(&card->discipline_mutex);
 977         mutex_lock(&card->conf_mutex);
 978         QETH_DBF_TEXT(SETUP, 2, "setonlin");
 979         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 980
 981         recover_flag = card->state;
 982         rc = qeth_core_hardsetup_card(card);
 983         if (rc) {
 984                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
 985                 rc = -ENODEV;
 986                 goto out_remove;
 987         }
 988
 989         if (!card->dev && qeth_l2_setup_netdev(card)) {
 990                 rc = -ENODEV;
 991                 goto out_remove;
 992         }
 993
 994         if (card->info.type != QETH_CARD_TYPE_OSN)
 995                 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
 996
 997         if (qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP)) {
 998                 if (card->info.hwtrap &&
 999                     qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM))
1000                         card->info.hwtrap = 0;
1001         } else
1002                 card->info.hwtrap = 0;
1003
1004         card->state = CARD_STATE_HARDSETUP;
1005         memset(&card->rx, 0, sizeof(struct qeth_rx));
1006         qeth_print_status_message(card);
1007
1008         /* softsetup */
1009         QETH_DBF_TEXT(SETUP, 2, "softsetp");
1010
1011         rc = qeth_send_startlan(card);
1012         if (rc) {
1013                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1014                 if (rc == 0xe080) {
1015                         dev_warn(&card->gdev->dev,
1016                                 "The LAN is offline\n");
1017                         card->lan_online = 0;
1018                         goto contin;
1019                 }
1020                 rc = -ENODEV;
1021                 goto out_remove;
1022         } else
1023                 card->lan_online = 1;
1024
1025 contin:
1026         if ((card->info.type == QETH_CARD_TYPE_OSD) ||
1027             (card->info.type == QETH_CARD_TYPE_OSX))
1028                 /* configure isolation level */
1029                 qeth_set_access_ctrl_online(card);
1030
1031         if (card->info.type != QETH_CARD_TYPE_OSN &&
1032             card->info.type != QETH_CARD_TYPE_OSM)
1033                 qeth_l2_process_vlans(card);
1034
1035         netif_tx_disable(card->dev);
1036
1037         rc = qeth_init_qdio_queues(card);
1038         if (rc) {
1039                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1040                 rc = -ENODEV;
1041                 goto out_remove;
1042         }
1043         card->state = CARD_STATE_SOFTSETUP;
1044         if (card->lan_online)
1045                 netif_carrier_on(card->dev);
1046         else
1047                 netif_carrier_off(card->dev);
1048
1049         qeth_set_allowed_threads(card, 0xffffffff, 0);
1050         if (recover_flag == CARD_STATE_RECOVER) {
1051                 if (recovery_mode &&
1052                     card->info.type != QETH_CARD_TYPE_OSN) {
1053                         __qeth_l2_open(card->dev);
1054                 } else {
1055                         rtnl_lock();
1056                         dev_open(card->dev);
1057                         rtnl_unlock();
1058                 }
1059                 /* this also sets saved unicast addresses */
1060                 qeth_l2_set_multicast_list(card->dev);
1061         }
1062         /* let user_space know that device is online */
1063         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1064         mutex_unlock(&card->conf_mutex);
1065         mutex_unlock(&card->discipline_mutex);
1066         return 0;
1067
1068 out_remove:
1069         qeth_l2_stop_card(card, 0);
1070         ccw_device_set_offline(CARD_DDEV(card));
1071         ccw_device_set_offline(CARD_WDEV(card));
1072         ccw_device_set_offline(CARD_RDEV(card));
1073         if (recover_flag == CARD_STATE_RECOVER)
1074                 card->state = CARD_STATE_RECOVER;
1075         else
1076                 card->state = CARD_STATE_DOWN;
1077         mutex_unlock(&card->conf_mutex);
1078         mutex_unlock(&card->discipline_mutex);
1079         return rc;
1080 }
1081
1082 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1083 {
1084         return __qeth_l2_set_online(gdev, 0);
1085 }
1086
1087 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1088                                         int recovery_mode)
1089 {
1090         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1091         int rc = 0, rc2 = 0, rc3 = 0;
1092         enum qeth_card_states recover_flag;
1093
1094         mutex_lock(&card->discipline_mutex);
1095         mutex_lock(&card->conf_mutex);
1096         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1097         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1098
1099         if (card->dev && netif_carrier_ok(card->dev))
1100                 netif_carrier_off(card->dev);
1101         recover_flag = card->state;
1102         if ((!recovery_mode && card->info.hwtrap) || card->info.hwtrap == 2) {
1103                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1104                 card->info.hwtrap = 1;
1105         }
1106         qeth_l2_stop_card(card, recovery_mode);
1107         rc  = ccw_device_set_offline(CARD_DDEV(card));
1108         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1109         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1110         if (!rc)
1111                 rc = (rc2) ? rc2 : rc3;
1112         if (rc)
1113                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1114         if (recover_flag == CARD_STATE_UP)
1115                 card->state = CARD_STATE_RECOVER;
1116         /* let user_space know that device is offline */
1117         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1118         mutex_unlock(&card->conf_mutex);
1119         mutex_unlock(&card->discipline_mutex);
1120         return 0;
1121 }
1122
1123 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1124 {
1125         return __qeth_l2_set_offline(cgdev, 0);
1126 }
1127
1128 static int qeth_l2_recover(void *ptr)
1129 {
1130         struct qeth_card *card;
1131         int rc = 0;
1132
1133         card = (struct qeth_card *) ptr;
1134         QETH_CARD_TEXT(card, 2, "recover1");
1135         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1136                 return 0;
1137         QETH_CARD_TEXT(card, 2, "recover2");
1138         dev_warn(&card->gdev->dev,
1139                 "A recovery process has been started for the device\n");
1140         __qeth_l2_set_offline(card->gdev, 1);
1141         rc = __qeth_l2_set_online(card->gdev, 1);
1142         if (!rc)
1143                 dev_info(&card->gdev->dev,
1144                         "Device successfully recovered!\n");
1145         else {
1146                 rtnl_lock();
1147                 dev_close(card->dev);
1148                 rtnl_unlock();
1149                 dev_warn(&card->gdev->dev, "The qeth device driver "
1150                         "failed to recover an error on the device\n");
1151         }
1152         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1153         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1154         return 0;
1155 }
1156
1157 static int __init qeth_l2_init(void)
1158 {
1159         pr_info("register layer 2 discipline\n");
1160         return 0;
1161 }
1162
1163 static void __exit qeth_l2_exit(void)
1164 {
1165         pr_info("unregister layer 2 discipline\n");
1166 }
1167
1168 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1169 {
1170         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1171         qeth_set_allowed_threads(card, 0, 1);
1172         if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
1173                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1174         qeth_qdio_clear_card(card, 0);
1175         qeth_clear_qdio_buffers(card);
1176 }
1177
1178 static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev)
1179 {
1180         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1181
1182         if (card->dev)
1183                 netif_device_detach(card->dev);
1184         qeth_set_allowed_threads(card, 0, 1);
1185         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1186         if (gdev->state == CCWGROUP_OFFLINE)
1187                 return 0;
1188         if (card->state == CARD_STATE_UP) {
1189                 if (card->info.hwtrap)
1190                         qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1191                 __qeth_l2_set_offline(card->gdev, 1);
1192         } else
1193                 __qeth_l2_set_offline(card->gdev, 0);
1194         return 0;
1195 }
1196
1197 static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
1198 {
1199         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1200         int rc = 0;
1201
1202         if (gdev->state == CCWGROUP_OFFLINE)
1203                 goto out;
1204
1205         if (card->state == CARD_STATE_RECOVER) {
1206                 rc = __qeth_l2_set_online(card->gdev, 1);
1207                 if (rc) {
1208                         rtnl_lock();
1209                         dev_close(card->dev);
1210                         rtnl_unlock();
1211                 }
1212         } else
1213                 rc = __qeth_l2_set_online(card->gdev, 0);
1214 out:
1215         qeth_set_allowed_threads(card, 0xffffffff, 0);
1216         if (card->dev)
1217                 netif_device_attach(card->dev);
1218         if (rc)
1219                 dev_warn(&card->gdev->dev, "The qeth device driver "
1220                         "failed to recover an error on the device\n");
1221         return rc;
1222 }
1223
1224 struct qeth_discipline qeth_l2_discipline = {
1225         .start_poll = qeth_qdio_start_poll,
1226         .input_handler = (qdio_handler_t *) qeth_qdio_input_handler,
1227         .output_handler = (qdio_handler_t *) qeth_qdio_output_handler,
1228         .recover = qeth_l2_recover,
1229         .setup = qeth_l2_probe_device,
1230         .remove = qeth_l2_remove_device,
1231         .set_online = qeth_l2_set_online,
1232         .set_offline = qeth_l2_set_offline,
1233         .shutdown = qeth_l2_shutdown,
1234         .freeze = qeth_l2_pm_suspend,
1235         .thaw = qeth_l2_pm_resume,
1236         .restore = qeth_l2_pm_resume,
1237 };
1238 EXPORT_SYMBOL_GPL(qeth_l2_discipline);
1239
1240 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1241                            struct qeth_cmd_buffer *iob)
1242 {
1243         unsigned long flags;
1244         int rc = 0;
1245
1246         QETH_CARD_TEXT(card, 5, "osndctrd");
1247
1248         wait_event(card->wait_q,
1249                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1250         qeth_prepare_control_data(card, len, iob);
1251         QETH_CARD_TEXT(card, 6, "osnoirqp");
1252         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1253         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1254                               (addr_t) iob, 0, 0);
1255         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1256         if (rc) {
1257                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1258                            "ccw_device_start rc = %i\n", rc);
1259                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1260                 qeth_release_buffer(iob->channel, iob);
1261                 atomic_set(&card->write.irq_pending, 0);
1262                 wake_up(&card->wait_q);
1263         }
1264         return rc;
1265 }
1266
1267 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1268                         struct qeth_cmd_buffer *iob, int data_len)
1269 {
1270         u16 s1, s2;
1271
1272         QETH_CARD_TEXT(card, 4, "osndipa");
1273
1274         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1275         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1276         s2 = (u16)data_len;
1277         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1278         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1279         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1280         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1281         return qeth_osn_send_control_data(card, s1, iob);
1282 }
1283
1284 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1285 {
1286         struct qeth_cmd_buffer *iob;
1287         struct qeth_card *card;
1288         int rc;
1289
1290         if (!dev)
1291                 return -ENODEV;
1292         card = dev->ml_priv;
1293         if (!card)
1294                 return -ENODEV;
1295         QETH_CARD_TEXT(card, 2, "osnsdmc");
1296         if ((card->state != CARD_STATE_UP) &&
1297             (card->state != CARD_STATE_SOFTSETUP))
1298                 return -ENODEV;
1299         iob = qeth_wait_for_buffer(&card->write);
1300         memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1301         rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1302         return rc;
1303 }
1304 EXPORT_SYMBOL(qeth_osn_assist);
1305
1306 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1307                   int (*assist_cb)(struct net_device *, void *),
1308                   int (*data_cb)(struct sk_buff *))
1309 {
1310         struct qeth_card *card;
1311
1312         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1313         if (*dev == NULL)
1314                 return -ENODEV;
1315         card = (*dev)->ml_priv;
1316         if (!card)
1317                 return -ENODEV;
1318         QETH_CARD_TEXT(card, 2, "osnreg");
1319         if ((assist_cb == NULL) || (data_cb == NULL))
1320                 return -EINVAL;
1321         card->osn_info.assist_cb = assist_cb;
1322         card->osn_info.data_cb = data_cb;
1323         return 0;
1324 }
1325 EXPORT_SYMBOL(qeth_osn_register);
1326
1327 void qeth_osn_deregister(struct net_device *dev)
1328 {
1329         struct qeth_card *card;
1330
1331         if (!dev)
1332                 return;
1333         card = dev->ml_priv;
1334         if (!card)
1335                 return;
1336         QETH_CARD_TEXT(card, 2, "osndereg");
1337         card->osn_info.assist_cb = NULL;
1338         card->osn_info.data_cb = NULL;
1339         return;
1340 }
1341 EXPORT_SYMBOL(qeth_osn_deregister);
1342
1343 module_init(qeth_l2_init);
1344 module_exit(qeth_l2_exit);
1345 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1346 MODULE_DESCRIPTION("qeth layer 2 discipline");
1347 MODULE_LICENSE("GPL");