drivers/s390/net/qeth_l2_main.c

   1 /*
   2  *  drivers/s390/net/qeth_l2_main.c
   3  *
   4  *    Copyright IBM Corp. 2007, 2009
   5  *    Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
   6  *               Frank Pavlic <fpavlic@de.ibm.com>,
   7  *               Thomas Spatzier <tspat@de.ibm.com>,
   8  *               Frank Blaschka <frank.blaschka@de.ibm.com>
   9  */
  10
  11 #define KMSG_COMPONENT "qeth"
  12 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  13
  14 #include <linux/module.h>
  15 #include <linux/moduleparam.h>
  16 #include <linux/string.h>
  17 #include <linux/errno.h>
  18 #include <linux/kernel.h>
  19 #include <linux/slab.h>
  20 #include <linux/etherdevice.h>
  21 #include <linux/mii.h>
  22 #include <linux/ip.h>
  23 #include <linux/list.h>
  24
  25 #include "qeth_core.h"
  26
  27 static int qeth_l2_set_offline(struct ccwgroup_device *);
  28 static int qeth_l2_stop(struct net_device *);
  29 static int qeth_l2_send_delmac(struct qeth_card *, __u8 *);
  30 static int qeth_l2_send_setdelmac(struct qeth_card *, __u8 *,
  31                            enum qeth_ipa_cmds,
  32                            int (*reply_cb) (struct qeth_card *,
  33                                             struct qeth_reply*,
  34                                             unsigned long));
  35 static void qeth_l2_set_multicast_list(struct net_device *);
  36 static int qeth_l2_recover(void *);
  37
  38 static int qeth_l2_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
  39 {
  40         struct qeth_card *card = dev->ml_priv;
  41         struct mii_ioctl_data *mii_data;
  42         int rc = 0;
  43
  44         if (!card)
  45                 return -ENODEV;
  46
  47         if ((card->state != CARD_STATE_UP) &&
  48                 (card->state != CARD_STATE_SOFTSETUP))
  49                 return -ENODEV;
  50
  51         if (card->info.type == QETH_CARD_TYPE_OSN)
  52                 return -EPERM;
  53
  54         switch (cmd) {
  55         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
  56                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
  57                 break;
  58         case SIOC_QETH_GET_CARD_TYPE:
  59                 if ((card->info.type == QETH_CARD_TYPE_OSD ||
  60                      card->info.type == QETH_CARD_TYPE_OSM ||
  61                      card->info.type == QETH_CARD_TYPE_OSX) &&
  62                     !card->info.guestlan)
  63                         return 1;
  64                 return 0;
  65                 break;
  66         case SIOCGMIIPHY:
  67                 mii_data = if_mii(rq);
  68                 mii_data->phy_id = 0;
  69                 break;
  70         case SIOCGMIIREG:
  71                 mii_data = if_mii(rq);
  72                 if (mii_data->phy_id != 0)
  73                         rc = -EINVAL;
  74                 else
  75                         mii_data->val_out = qeth_mdio_read(dev,
  76                                 mii_data->phy_id, mii_data->reg_num);
  77                 break;
  78         default:
  79                 rc = -EOPNOTSUPP;
  80         }
  81         if (rc)
  82                 QETH_CARD_TEXT_(card, 2, "ioce%d", rc);
  83         return rc;
  84 }
  85
  86 static int qeth_l2_verify_dev(struct net_device *dev)
  87 {
  88         struct qeth_card *card;
  89         unsigned long flags;
  90         int rc = 0;
  91
  92         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
  93         list_for_each_entry(card, &qeth_core_card_list.list, list) {
  94                 if (card->dev == dev) {
  95                         rc = QETH_REAL_CARD;
  96                         break;
  97                 }
  98         }
  99         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
 100
 101         return rc;
 102 }
 103
 104 static struct net_device *qeth_l2_netdev_by_devno(unsigned char *read_dev_no)
 105 {
 106         struct qeth_card *card;
 107         struct net_device *ndev;
 108         __u16 temp_dev_no;
 109         unsigned long flags;
 110         struct ccw_dev_id read_devid;
 111
 112         ndev = NULL;
 113         memcpy(&temp_dev_no, read_dev_no, 2);
 114         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
 115         list_for_each_entry(card, &qeth_core_card_list.list, list) {
 116                 ccw_device_get_id(CARD_RDEV(card), &read_devid);
 117                 if (read_devid.devno == temp_dev_no) {
 118                         ndev = card->dev;
 119                         break;
 120                 }
 121         }
 122         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
 123         return ndev;
 124 }
 125
 126 static int qeth_l2_send_setgroupmac_cb(struct qeth_card *card,
 127                                 struct qeth_reply *reply,
 128                                 unsigned long data)
 129 {
 130         struct qeth_ipa_cmd *cmd;
 131         __u8 *mac;
 132
 133         QETH_CARD_TEXT(card, 2, "L2Sgmacb");
 134         cmd = (struct qeth_ipa_cmd *) data;
 135         mac = &cmd->data.setdelmac.mac[0];
 136         /* MAC already registered, needed in couple/uncouple case */
 137         if (cmd->hdr.return_code ==  IPA_RC_L2_DUP_MAC) {
 138                 QETH_DBF_MESSAGE(2, "Group MAC %pM already existing on %s \n",
 139                           mac, QETH_CARD_IFNAME(card));
 140                 cmd->hdr.return_code = 0;
 141         }
 142         if (cmd->hdr.return_code)
 143                 QETH_DBF_MESSAGE(2, "Could not set group MAC %pM on %s: %x\n",
 144                           mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 145         return 0;
 146 }
 147
 148 static int qeth_l2_send_setgroupmac(struct qeth_card *card, __u8 *mac)
 149 {
 150         QETH_CARD_TEXT(card, 2, "L2Sgmac");
 151         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETGMAC,
 152                                           qeth_l2_send_setgroupmac_cb);
 153 }
 154
 155 static int qeth_l2_send_delgroupmac_cb(struct qeth_card *card,
 156                                 struct qeth_reply *reply,
 157                                 unsigned long data)
 158 {
 159         struct qeth_ipa_cmd *cmd;
 160         __u8 *mac;
 161
 162         QETH_CARD_TEXT(card, 2, "L2Dgmacb");
 163         cmd = (struct qeth_ipa_cmd *) data;
 164         mac = &cmd->data.setdelmac.mac[0];
 165         if (cmd->hdr.return_code)
 166                 QETH_DBF_MESSAGE(2, "Could not delete group MAC %pM on %s: %x\n",
 167                           mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 168         return 0;
 169 }
 170
 171 static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac)
 172 {
 173         QETH_CARD_TEXT(card, 2, "L2Dgmac");
 174         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELGMAC,
 175                                           qeth_l2_send_delgroupmac_cb);
 176 }
 177
 178 static void qeth_l2_add_mc(struct qeth_card *card, __u8 *mac, int vmac)
 179 {
 180         struct qeth_mc_mac *mc;
 181         int rc;
 182
 183         mc = kmalloc(sizeof(struct qeth_mc_mac), GFP_ATOMIC);
 184
 185         if (!mc)
 186                 return;
 187
 188         memcpy(mc->mc_addr, mac, OSA_ADDR_LEN);
 189         mc->mc_addrlen = OSA_ADDR_LEN;
 190         mc->is_vmac = vmac;
 191
 192         if (vmac) {
 193                 rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
 194                                         NULL);
 195         } else {
 196                 rc = qeth_l2_send_setgroupmac(card, mac);
 197         }
 198
 199         if (!rc)
 200                 list_add_tail(&mc->list, &card->mc_list);
 201         else
 202                 kfree(mc);
 203 }
 204
 205 static void qeth_l2_del_all_mc(struct qeth_card *card, int del)
 206 {
 207         struct qeth_mc_mac *mc, *tmp;
 208
 209         spin_lock_bh(&card->mclock);
 210         list_for_each_entry_safe(mc, tmp, &card->mc_list, list) {
 211                 if (del) {
 212                         if (mc->is_vmac)
 213                                 qeth_l2_send_setdelmac(card, mc->mc_addr,
 214                                         IPA_CMD_DELVMAC, NULL);
 215                         else
 216                                 qeth_l2_send_delgroupmac(card, mc->mc_addr);
 217                 }
 218                 list_del(&mc->list);
 219                 kfree(mc);
 220         }
 221         spin_unlock_bh(&card->mclock);
 222 }
 223
 224 static inline int qeth_l2_get_cast_type(struct qeth_card *card,
 225                         struct sk_buff *skb)
 226 {
 227         if (card->info.type == QETH_CARD_TYPE_OSN)
 228                 return RTN_UNSPEC;
 229         if (is_broadcast_ether_addr(skb->data))
 230                 return RTN_BROADCAST;
 231         if (is_multicast_ether_addr(skb->data))
 232                 return RTN_MULTICAST;
 233         return RTN_UNSPEC;
 234 }
 235
 236 static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
 237                         struct sk_buff *skb, int ipv, int cast_type)
 238 {
 239         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
 240
 241         memset(hdr, 0, sizeof(struct qeth_hdr));
 242         hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
 243
 244         /* set byte byte 3 to casting flags */
 245         if (cast_type == RTN_MULTICAST)
 246                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 247         else if (cast_type == RTN_BROADCAST)
 248                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 249         else
 250                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 251
 252         hdr->hdr.l2.pkt_length = skb->len-QETH_HEADER_SIZE;
 253         /* VSWITCH relies on the VLAN
 254          * information to be present in
 255          * the QDIO header */
 256         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
 257                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
 258                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
 259         }
 260 }
 261
 262 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
 263                         struct qeth_reply *reply, unsigned long data)
 264 {
 265         struct qeth_ipa_cmd *cmd;
 266
 267         QETH_CARD_TEXT(card, 2, "L2sdvcb");
 268         cmd = (struct qeth_ipa_cmd *) data;
 269         if (cmd->hdr.return_code) {
 270                 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x. "
 271                           "Continuing\n", cmd->data.setdelvlan.vlan_id,
 272                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 273                 QETH_CARD_TEXT_(card, 2, "L2VL%4x", cmd->hdr.command);
 274                 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code);
 275         }
 276         return 0;
 277 }
 278
 279 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
 280                                 enum qeth_ipa_cmds ipacmd)
 281 {
 282         struct qeth_ipa_cmd *cmd;
 283         struct qeth_cmd_buffer *iob;
 284
 285         QETH_CARD_TEXT_(card, 4, "L2sdv%x", ipacmd);
 286         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 287         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 288         cmd->data.setdelvlan.vlan_id = i;
 289         return qeth_send_ipa_cmd(card, iob,
 290                                  qeth_l2_send_setdelvlan_cb, NULL);
 291 }
 292
 293 static void qeth_l2_process_vlans(struct qeth_card *card)
 294 {
 295         struct qeth_vlan_vid *id;
 296         QETH_CARD_TEXT(card, 3, "L2prcvln");
 297         spin_lock_bh(&card->vlanlock);
 298         list_for_each_entry(id, &card->vid_list, list) {
 299                 qeth_l2_send_setdelvlan(card, id->vid, IPA_CMD_SETVLAN);
 300         }
 301         spin_unlock_bh(&card->vlanlock);
 302 }
 303
 304 static int qeth_l2_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
 305 {
 306         struct qeth_card *card = dev->ml_priv;
 307         struct qeth_vlan_vid *id;
 308
 309         QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
 310         if (!vid)
 311                 return 0;
 312         if (card->info.type == QETH_CARD_TYPE_OSM) {
 313                 QETH_CARD_TEXT(card, 3, "aidOSM");
 314                 return 0;
 315         }
 316         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 317                 QETH_CARD_TEXT(card, 3, "aidREC");
 318                 return 0;
 319         }
 320         id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
 321         if (id) {
 322                 id->vid = vid;
 323                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
 324                 spin_lock_bh(&card->vlanlock);
 325                 list_add_tail(&id->list, &card->vid_list);
 326                 spin_unlock_bh(&card->vlanlock);
 327         } else {
 328                 return -ENOMEM;
 329         }
 330         return 0;
 331 }
 332
 333 static int qeth_l2_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
 334 {
 335         struct qeth_vlan_vid *id, *tmpid = NULL;
 336         struct qeth_card *card = dev->ml_priv;
 337
 338         QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
 339         if (card->info.type == QETH_CARD_TYPE_OSM) {
 340                 QETH_CARD_TEXT(card, 3, "kidOSM");
 341                 return 0;
 342         }
 343         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 344                 QETH_CARD_TEXT(card, 3, "kidREC");
 345                 return 0;
 346         }
 347         spin_lock_bh(&card->vlanlock);
 348         list_for_each_entry(id, &card->vid_list, list) {
 349                 if (id->vid == vid) {
 350                         list_del(&id->list);
 351                         tmpid = id;
 352                         break;
 353                 }
 354         }
 355         spin_unlock_bh(&card->vlanlock);
 356         if (tmpid) {
 357                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 358                 kfree(tmpid);
 359         }
 360         qeth_l2_set_multicast_list(card->dev);
 361         return 0;
 362 }
 363
 364 static int qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
 365 {
 366         int rc = 0;
 367
 368         QETH_DBF_TEXT(SETUP , 2, "stopcard");
 369         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 370
 371         qeth_set_allowed_threads(card, 0, 1);
 372         if (card->read.state == CH_STATE_UP &&
 373             card->write.state == CH_STATE_UP &&
 374             (card->state == CARD_STATE_UP)) {
 375                 if (recovery_mode &&
 376                     card->info.type != QETH_CARD_TYPE_OSN) {
 377                         qeth_l2_stop(card->dev);
 378                 } else {
 379                         rtnl_lock();
 380                         dev_close(card->dev);
 381                         rtnl_unlock();
 382                 }
 383                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 384                 card->state = CARD_STATE_SOFTSETUP;
 385         }
 386         if (card->state == CARD_STATE_SOFTSETUP) {
 387                 qeth_l2_del_all_mc(card, 0);
 388                 qeth_clear_ipacmd_list(card);
 389                 card->state = CARD_STATE_HARDSETUP;
 390         }
 391         if (card->state == CARD_STATE_HARDSETUP) {
 392                 qeth_qdio_clear_card(card, 0);
 393                 qeth_clear_qdio_buffers(card);
 394                 qeth_clear_working_pool_list(card);
 395                 card->state = CARD_STATE_DOWN;
 396         }
 397         if (card->state == CARD_STATE_DOWN) {
 398                 qeth_clear_cmd_buffers(&card->read);
 399                 qeth_clear_cmd_buffers(&card->write);
 400         }
 401         return rc;
 402 }
 403
 404 static int qeth_l2_process_inbound_buffer(struct qeth_card *card,
 405                                 int budget, int *done)
 406 {
 407         int work_done = 0;
 408         struct sk_buff *skb;
 409         struct qeth_hdr *hdr;
 410         unsigned int len;
 411
 412         *done = 0;
 413         BUG_ON(!budget);
 414         while (budget) {
 415                 skb = qeth_core_get_next_skb(card,
 416                         &card->qdio.in_q->bufs[card->rx.b_index],
 417                         &card->rx.b_element, &card->rx.e_offset, &hdr);
 418                 if (!skb) {
 419                         *done = 1;
 420                         break;
 421                 }
 422                 skb->dev = card->dev;
 423                 switch (hdr->hdr.l2.id) {
 424                 case QETH_HEADER_TYPE_LAYER2:
 425                         skb->pkt_type = PACKET_HOST;
 426                         skb->protocol = eth_type_trans(skb, skb->dev);
 427                         skb->ip_summed = CHECKSUM_NONE;
 428                         if (skb->protocol == htons(ETH_P_802_2))
 429                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
 430                         len = skb->len;
 431                         netif_receive_skb(skb);
 432                         break;
 433                 case QETH_HEADER_TYPE_OSN:
 434                         if (card->info.type == QETH_CARD_TYPE_OSN) {
 435                                 skb_push(skb, sizeof(struct qeth_hdr));
 436                                 skb_copy_to_linear_data(skb, hdr,
 437                                                 sizeof(struct qeth_hdr));
 438                                 len = skb->len;
 439                                 card->osn_info.data_cb(skb);
 440                                 break;
 441                         }
 442                         /* else unknown */
 443                 default:
 444                         dev_kfree_skb_any(skb);
 445                         QETH_CARD_TEXT(card, 3, "inbunkno");
 446                         QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
 447                         continue;
 448                 }
 449                 work_done++;
 450                 budget--;
 451                 card->stats.rx_packets++;
 452                 card->stats.rx_bytes += len;
 453         }
 454         return work_done;
 455 }
 456
 457 static int qeth_l2_poll(struct napi_struct *napi, int budget)
 458 {
 459         struct qeth_card *card = container_of(napi, struct qeth_card, napi);
 460         int work_done = 0;
 461         struct qeth_qdio_buffer *buffer;
 462         int done;
 463         int new_budget = budget;
 464
 465         if (card->options.performance_stats) {
 466                 card->perf_stats.inbound_cnt++;
 467                 card->perf_stats.inbound_start_time = qeth_get_micros();
 468         }
 469
 470         while (1) {
 471                 if (!card->rx.b_count) {
 472                         card->rx.qdio_err = 0;
 473                         card->rx.b_count = qdio_get_next_buffers(
 474                                 card->data.ccwdev, 0, &card->rx.b_index,
 475                                 &card->rx.qdio_err);
 476                         if (card->rx.b_count <= 0) {
 477                                 card->rx.b_count = 0;
 478                                 break;
 479                         }
 480                         card->rx.b_element =
 481                                 &card->qdio.in_q->bufs[card->rx.b_index]
 482                                 .buffer->element[0];
 483                         card->rx.e_offset = 0;
 484                 }
 485
 486                 while (card->rx.b_count) {
 487                         buffer = &card->qdio.in_q->bufs[card->rx.b_index];
 488                         if (!(card->rx.qdio_err &&
 489                             qeth_check_qdio_errors(card, buffer->buffer,
 490                             card->rx.qdio_err, "qinerr")))
 491                                 work_done += qeth_l2_process_inbound_buffer(
 492                                         card, new_budget, &done);
 493                         else
 494                                 done = 1;
 495
 496                         if (done) {
 497                                 if (card->options.performance_stats)
 498                                         card->perf_stats.bufs_rec++;
 499                                 qeth_put_buffer_pool_entry(card,
 500                                         buffer->pool_entry);
 501                                 qeth_queue_input_buffer(card, card->rx.b_index);
 502                                 card->rx.b_count--;
 503                                 if (card->rx.b_count) {
 504                                         card->rx.b_index =
 505                                                 (card->rx.b_index + 1) %
 506                                                 QDIO_MAX_BUFFERS_PER_Q;
 507                                         card->rx.b_element =
 508                                                 &card->qdio.in_q
 509                                                 ->bufs[card->rx.b_index]
 510                                                 .buffer->element[0];
 511                                         card->rx.e_offset = 0;
 512                                 }
 513                         }
 514
 515                         if (work_done >= budget)
 516                                 goto out;
 517                         else
 518                                 new_budget = budget - work_done;
 519                 }
 520         }
 521
 522         napi_complete(napi);
 523         if (qdio_start_irq(card->data.ccwdev, 0))
 524                 napi_schedule(&card->napi);
 525 out:
 526         if (card->options.performance_stats)
 527                 card->perf_stats.inbound_time += qeth_get_micros() -
 528                         card->perf_stats.inbound_start_time;
 529         return work_done;
 530 }
 531
 532 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
 533                            enum qeth_ipa_cmds ipacmd,
 534                            int (*reply_cb) (struct qeth_card *,
 535                                             struct qeth_reply*,
 536                                             unsigned long))
 537 {
 538         struct qeth_ipa_cmd *cmd;
 539         struct qeth_cmd_buffer *iob;
 540
 541         QETH_CARD_TEXT(card, 2, "L2sdmac");
 542         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 543         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 544         cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
 545         memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
 546         return qeth_send_ipa_cmd(card, iob, reply_cb, NULL);
 547 }
 548
 549 static int qeth_l2_send_setmac_cb(struct qeth_card *card,
 550                            struct qeth_reply *reply,
 551                            unsigned long data)
 552 {
 553         struct qeth_ipa_cmd *cmd;
 554
 555         QETH_CARD_TEXT(card, 2, "L2Smaccb");
 556         cmd = (struct qeth_ipa_cmd *) data;
 557         if (cmd->hdr.return_code) {
 558                 QETH_CARD_TEXT_(card, 2, "L2er%x", cmd->hdr.return_code);
 559                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 560                 switch (cmd->hdr.return_code) {
 561                 case IPA_RC_L2_DUP_MAC:
 562                 case IPA_RC_L2_DUP_LAYER3_MAC:
 563                         dev_warn(&card->gdev->dev,
 564                                 "MAC address %pM already exists\n",
 565                                 cmd->data.setdelmac.mac);
 566                         break;
 567                 case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
 568                 case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
 569                         dev_warn(&card->gdev->dev,
 570                                 "MAC address %pM is not authorized\n",
 571                                 cmd->data.setdelmac.mac);
 572                         break;
 573                 default:
 574                         break;
 575                 }
 576                 cmd->hdr.return_code = -EIO;
 577         } else {
 578                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 579                 memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
 580                        OSA_ADDR_LEN);
 581                 dev_info(&card->gdev->dev,
 582                         "MAC address %pM successfully registered on device %s\n",
 583                         card->dev->dev_addr, card->dev->name);
 584         }
 585         return 0;
 586 }
 587
 588 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
 589 {
 590         QETH_CARD_TEXT(card, 2, "L2Setmac");
 591         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
 592                                           qeth_l2_send_setmac_cb);
 593 }
 594
 595 static int qeth_l2_send_delmac_cb(struct qeth_card *card,
 596                            struct qeth_reply *reply,
 597                            unsigned long data)
 598 {
 599         struct qeth_ipa_cmd *cmd;
 600
 601         QETH_CARD_TEXT(card, 2, "L2Dmaccb");
 602         cmd = (struct qeth_ipa_cmd *) data;
 603         if (cmd->hdr.return_code) {
 604                 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code);
 605                 cmd->hdr.return_code = -EIO;
 606                 return 0;
 607         }
 608         card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 609
 610         return 0;
 611 }
 612
 613 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
 614 {
 615         QETH_CARD_TEXT(card, 2, "L2Delmac");
 616         if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
 617                 return 0;
 618         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
 619                                           qeth_l2_send_delmac_cb);
 620 }
 621
 622 static int qeth_l2_request_initial_mac(struct qeth_card *card)
 623 {
 624         int rc = 0;
 625         char vendor_pre[] = {0x02, 0x00, 0x00};
 626
 627         QETH_DBF_TEXT(SETUP, 2, "doL2init");
 628         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
 629
 630         rc = qeth_query_setadapterparms(card);
 631         if (rc) {
 632                 QETH_DBF_MESSAGE(2, "could not query adapter parameters on "
 633                         "device %s: x%x\n", CARD_BUS_ID(card), rc);
 634         }
 635
 636         if (card->info.type == QETH_CARD_TYPE_IQD ||
 637             card->info.type == QETH_CARD_TYPE_OSM ||
 638             card->info.type == QETH_CARD_TYPE_OSX ||
 639             card->info.guestlan) {
 640                 rc = qeth_setadpparms_change_macaddr(card);
 641                 if (rc) {
 642                         QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
 643                                 "device %s: x%x\n", CARD_BUS_ID(card), rc);
 644                         QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 645                         return rc;
 646                 }
 647                 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN);
 648         } else {
 649                 random_ether_addr(card->dev->dev_addr);
 650                 memcpy(card->dev->dev_addr, vendor_pre, 3);
 651         }
 652         return 0;
 653 }
 654
 655 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 656 {
 657         struct sockaddr *addr = p;
 658         struct qeth_card *card = dev->ml_priv;
 659         int rc = 0;
 660
 661         QETH_CARD_TEXT(card, 3, "setmac");
 662
 663         if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
 664                 QETH_CARD_TEXT(card, 3, "setmcINV");
 665                 return -EOPNOTSUPP;
 666         }
 667
 668         if (card->info.type == QETH_CARD_TYPE_OSN ||
 669             card->info.type == QETH_CARD_TYPE_OSM ||
 670             card->info.type == QETH_CARD_TYPE_OSX) {
 671                 QETH_CARD_TEXT(card, 3, "setmcTYP");
 672                 return -EOPNOTSUPP;
 673         }
 674         QETH_CARD_HEX(card, 3, addr->sa_data, OSA_ADDR_LEN);
 675         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 676                 QETH_CARD_TEXT(card, 3, "setmcREC");
 677                 return -ERESTARTSYS;
 678         }
 679         rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
 680         if (!rc)
 681                 rc = qeth_l2_send_setmac(card, addr->sa_data);
 682         return rc;
 683 }
 684
 685 static void qeth_l2_set_multicast_list(struct net_device *dev)
 686 {
 687         struct qeth_card *card = dev->ml_priv;
 688         struct netdev_hw_addr *ha;
 689
 690         if (card->info.type == QETH_CARD_TYPE_OSN)
 691                 return ;
 692
 693         QETH_CARD_TEXT(card, 3, "setmulti");
 694         if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
 695             (card->state != CARD_STATE_UP))
 696                 return;
 697         qeth_l2_del_all_mc(card, 1);
 698         spin_lock_bh(&card->mclock);
 699         netdev_for_each_mc_addr(ha, dev)
 700                 qeth_l2_add_mc(card, ha->addr, 0);
 701
 702         netdev_for_each_uc_addr(ha, dev)
 703                 qeth_l2_add_mc(card, ha->addr, 1);
 704
 705         spin_unlock_bh(&card->mclock);
 706         if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
 707                 return;
 708         qeth_setadp_promisc_mode(card);
 709 }
 710
 711 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 712 {
 713         int rc;
 714         struct qeth_hdr *hdr = NULL;
 715         int elements = 0;
 716         struct qeth_card *card = dev->ml_priv;
 717         struct sk_buff *new_skb = skb;
 718         int ipv = qeth_get_ip_version(skb);
 719         int cast_type = qeth_l2_get_cast_type(card, skb);
 720         struct qeth_qdio_out_q *queue = card->qdio.out_qs
 721                 [qeth_get_priority_queue(card, skb, ipv, cast_type)];
 722         int tx_bytes = skb->len;
 723         int data_offset = -1;
 724         int elements_needed = 0;
 725         int hd_len = 0;
 726
 727         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
 728                 card->stats.tx_carrier_errors++;
 729                 goto tx_drop;
 730         }
 731
 732         if ((card->info.type == QETH_CARD_TYPE_OSN) &&
 733             (skb->protocol == htons(ETH_P_IPV6)))
 734                 goto tx_drop;
 735
 736         if (card->options.performance_stats) {
 737                 card->perf_stats.outbound_cnt++;
 738                 card->perf_stats.outbound_start_time = qeth_get_micros();
 739         }
 740         netif_stop_queue(dev);
 741
 742         if (card->info.type == QETH_CARD_TYPE_OSN)
 743                 hdr = (struct qeth_hdr *)skb->data;
 744         else {
 745                 if (card->info.type == QETH_CARD_TYPE_IQD) {
 746                         new_skb = skb;
 747                         data_offset = ETH_HLEN;
 748                         hd_len = ETH_HLEN;
 749                         hdr = kmem_cache_alloc(qeth_core_header_cache,
 750                                                 GFP_ATOMIC);
 751                         if (!hdr)
 752                                 goto tx_drop;
 753                         elements_needed++;
 754                         skb_reset_mac_header(new_skb);
 755                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 756                         hdr->hdr.l2.pkt_length = new_skb->len;
 757                         memcpy(((char *)hdr) + sizeof(struct qeth_hdr),
 758                                 skb_mac_header(new_skb), ETH_HLEN);
 759                 } else {
 760                         /* create a clone with writeable headroom */
 761                         new_skb = skb_realloc_headroom(skb,
 762                                                 sizeof(struct qeth_hdr));
 763                         if (!new_skb)
 764                                 goto tx_drop;
 765                         hdr = (struct qeth_hdr *)skb_push(new_skb,
 766                                                 sizeof(struct qeth_hdr));
 767                         skb_set_mac_header(new_skb, sizeof(struct qeth_hdr));
 768                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 769                 }
 770         }
 771
 772         elements = qeth_get_elements_no(card, (void *)hdr, new_skb,
 773                                                 elements_needed);
 774         if (!elements) {
 775                 if (data_offset >= 0)
 776                         kmem_cache_free(qeth_core_header_cache, hdr);
 777                 goto tx_drop;
 778         }
 779
 780         if (card->info.type != QETH_CARD_TYPE_IQD) {
 781                 if (qeth_hdr_chk_and_bounce(new_skb,
 782                     sizeof(struct qeth_hdr_layer2)))
 783                         goto tx_drop;
 784                 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
 785                                          elements);
 786         } else
 787                 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
 788                                         elements, data_offset, hd_len);
 789         if (!rc) {
 790                 card->stats.tx_packets++;
 791                 card->stats.tx_bytes += tx_bytes;
 792                 if (new_skb != skb)
 793                         dev_kfree_skb_any(skb);
 794                 rc = NETDEV_TX_OK;
 795         } else {
 796                 if (data_offset >= 0)
 797                         kmem_cache_free(qeth_core_header_cache, hdr);
 798
 799                 if (rc == -EBUSY) {
 800                         if (new_skb != skb)
 801                                 dev_kfree_skb_any(new_skb);
 802                         return NETDEV_TX_BUSY;
 803                 } else
 804                         goto tx_drop;
 805         }
 806
 807         netif_wake_queue(dev);
 808         if (card->options.performance_stats)
 809                 card->perf_stats.outbound_time += qeth_get_micros() -
 810                         card->perf_stats.outbound_start_time;
 811         return rc;
 812
 813 tx_drop:
 814         card->stats.tx_dropped++;
 815         card->stats.tx_errors++;
 816         if ((new_skb != skb) && new_skb)
 817                 dev_kfree_skb_any(new_skb);
 818         dev_kfree_skb_any(skb);
 819         netif_wake_queue(dev);
 820         return NETDEV_TX_OK;
 821 }
 822
 823 static int __qeth_l2_open(struct net_device *dev)
 824 {
 825         struct qeth_card *card = dev->ml_priv;
 826         int rc = 0;
 827
 828         QETH_CARD_TEXT(card, 4, "qethopen");
 829         if (card->state == CARD_STATE_UP)
 830                 return rc;
 831         if (card->state != CARD_STATE_SOFTSETUP)
 832                 return -ENODEV;
 833
 834         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
 835              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
 836                 QETH_CARD_TEXT(card, 4, "nomacadr");
 837                 return -EPERM;
 838         }
 839         card->data.state = CH_STATE_UP;
 840         card->state = CARD_STATE_UP;
 841         netif_start_queue(dev);
 842
 843         if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) {
 844                 napi_enable(&card->napi);
 845                 napi_schedule(&card->napi);
 846         } else
 847                 rc = -EIO;
 848         return rc;
 849 }
 850
 851 static int qeth_l2_open(struct net_device *dev)
 852 {
 853         struct qeth_card *card = dev->ml_priv;
 854
 855         QETH_CARD_TEXT(card, 5, "qethope_");
 856         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 857                 QETH_CARD_TEXT(card, 3, "openREC");
 858                 return -ERESTARTSYS;
 859         }
 860         return __qeth_l2_open(dev);
 861 }
 862
 863 static int qeth_l2_stop(struct net_device *dev)
 864 {
 865         struct qeth_card *card = dev->ml_priv;
 866
 867         QETH_CARD_TEXT(card, 4, "qethstop");
 868         netif_tx_disable(dev);
 869         if (card->state == CARD_STATE_UP) {
 870                 card->state = CARD_STATE_SOFTSETUP;
 871                 napi_disable(&card->napi);
 872         }
 873         return 0;
 874 }
 875
 876 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 877 {
 878         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 879
 880         INIT_LIST_HEAD(&card->vid_list);
 881         INIT_LIST_HEAD(&card->mc_list);
 882         card->options.layer2 = 1;
 883         card->info.hwtrap = 0;
 884         card->discipline.start_poll = qeth_qdio_start_poll;
 885         card->discipline.input_handler = (qdio_handler_t *)
 886                 qeth_qdio_input_handler;
 887         card->discipline.output_handler = (qdio_handler_t *)
 888                 qeth_qdio_output_handler;
 889         card->discipline.recover = qeth_l2_recover;
 890         return 0;
 891 }
 892
 893 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
 894 {
 895         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
 896
 897         qeth_set_allowed_threads(card, 0, 1);
 898         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 899
 900         if (cgdev->state == CCWGROUP_ONLINE)
 901                 qeth_l2_set_offline(cgdev);
 902
 903         if (card->dev) {
 904                 unregister_netdev(card->dev);
 905                 card->dev = NULL;
 906         }
 907         return;
 908 }
 909
 910 static const struct ethtool_ops qeth_l2_ethtool_ops = {
 911         .get_link = ethtool_op_get_link,
 912         .get_strings = qeth_core_get_strings,
 913         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 914         .get_sset_count = qeth_core_get_sset_count,
 915         .get_drvinfo = qeth_core_get_drvinfo,
 916         .get_settings = qeth_core_ethtool_get_settings,
 917 };
 918
 919 static const struct ethtool_ops qeth_l2_osn_ops = {
 920         .get_strings = qeth_core_get_strings,
 921         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 922         .get_sset_count = qeth_core_get_sset_count,
 923         .get_drvinfo = qeth_core_get_drvinfo,
 924 };
 925
 926 static const struct net_device_ops qeth_l2_netdev_ops = {
 927         .ndo_open               = qeth_l2_open,
 928         .ndo_stop               = qeth_l2_stop,
 929         .ndo_get_stats          = qeth_get_stats,
 930         .ndo_start_xmit         = qeth_l2_hard_start_xmit,
 931         .ndo_validate_addr      = eth_validate_addr,
 932         .ndo_set_rx_mode        = qeth_l2_set_multicast_list,
 933         .ndo_do_ioctl           = qeth_l2_do_ioctl,
 934         .ndo_set_mac_address    = qeth_l2_set_mac_address,
 935         .ndo_change_mtu         = qeth_change_mtu,
 936         .ndo_vlan_rx_add_vid    = qeth_l2_vlan_rx_add_vid,
 937         .ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,
 938         .ndo_tx_timeout         = qeth_tx_timeout,
 939 };
 940
 941 static int qeth_l2_setup_netdev(struct qeth_card *card)
 942 {
 943         switch (card->info.type) {
 944         case QETH_CARD_TYPE_IQD:
 945                 card->dev = alloc_netdev(0, "hsi%d", ether_setup);
 946                 break;
 947         case QETH_CARD_TYPE_OSN:
 948                 card->dev = alloc_netdev(0, "osn%d", ether_setup);
 949                 card->dev->flags |= IFF_NOARP;
 950                 break;
 951         default:
 952                 card->dev = alloc_etherdev(0);
 953         }
 954
 955         if (!card->dev)
 956                 return -ENODEV;
 957
 958         card->dev->ml_priv = card;
 959         card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
 960         card->dev->mtu = card->info.initial_mtu;
 961         card->dev->netdev_ops = &qeth_l2_netdev_ops;
 962         if (card->info.type != QETH_CARD_TYPE_OSN)
 963                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops);
 964         else
 965                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops);
 966         card->dev->features |= NETIF_F_HW_VLAN_FILTER;
 967         card->info.broadcast_capable = 1;
 968         qeth_l2_request_initial_mac(card);
 969         SET_NETDEV_DEV(card->dev, &card->gdev->dev);
 970         netif_napi_add(card->dev, &card->napi, qeth_l2_poll, QETH_NAPI_WEIGHT);
 971         return register_netdev(card->dev);
 972 }
 973
 974 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 975 {
 976         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 977         int rc = 0;
 978         enum qeth_card_states recover_flag;
 979
 980         BUG_ON(!card);
 981         mutex_lock(&card->discipline_mutex);
 982         mutex_lock(&card->conf_mutex);
 983         QETH_DBF_TEXT(SETUP, 2, "setonlin");
 984         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 985
 986         recover_flag = card->state;
 987         rc = qeth_core_hardsetup_card(card);
 988         if (rc) {
 989                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
 990                 rc = -ENODEV;
 991                 goto out_remove;
 992         }
 993
 994         if (!card->dev && qeth_l2_setup_netdev(card)) {
 995                 rc = -ENODEV;
 996                 goto out_remove;
 997         }
 998
 999         if (card->info.type != QETH_CARD_TYPE_OSN)
1000                 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
1001
1002         if (qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP)) {
1003                 if (card->info.hwtrap &&
1004                     qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM))
1005                         card->info.hwtrap = 0;
1006         } else
1007                 card->info.hwtrap = 0;
1008
1009         card->state = CARD_STATE_HARDSETUP;
1010         memset(&card->rx, 0, sizeof(struct qeth_rx));
1011         qeth_print_status_message(card);
1012
1013         /* softsetup */
1014         QETH_DBF_TEXT(SETUP, 2, "softsetp");
1015
1016         rc = qeth_send_startlan(card);
1017         if (rc) {
1018                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1019                 if (rc == 0xe080) {
1020                         dev_warn(&card->gdev->dev,
1021                                 "The LAN is offline\n");
1022                         card->lan_online = 0;
1023                         goto contin;
1024                 }
1025                 rc = -ENODEV;
1026                 goto out_remove;
1027         } else
1028                 card->lan_online = 1;
1029
1030 contin:
1031         if ((card->info.type == QETH_CARD_TYPE_OSD) ||
1032             (card->info.type == QETH_CARD_TYPE_OSX))
1033                 /* configure isolation level */
1034                 qeth_set_access_ctrl_online(card);
1035
1036         if (card->info.type != QETH_CARD_TYPE_OSN &&
1037             card->info.type != QETH_CARD_TYPE_OSM)
1038                 qeth_l2_process_vlans(card);
1039
1040         netif_tx_disable(card->dev);
1041
1042         rc = qeth_init_qdio_queues(card);
1043         if (rc) {
1044                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1045                 rc = -ENODEV;
1046                 goto out_remove;
1047         }
1048         card->state = CARD_STATE_SOFTSETUP;
1049         if (card->lan_online)
1050                 netif_carrier_on(card->dev);
1051         else
1052                 netif_carrier_off(card->dev);
1053
1054         qeth_set_allowed_threads(card, 0xffffffff, 0);
1055         if (recover_flag == CARD_STATE_RECOVER) {
1056                 if (recovery_mode &&
1057                     card->info.type != QETH_CARD_TYPE_OSN) {
1058                         __qeth_l2_open(card->dev);
1059                 } else {
1060                         rtnl_lock();
1061                         dev_open(card->dev);
1062                         rtnl_unlock();
1063                 }
1064                 /* this also sets saved unicast addresses */
1065                 qeth_l2_set_multicast_list(card->dev);
1066         }
1067         /* let user_space know that device is online */
1068         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1069         mutex_unlock(&card->conf_mutex);
1070         mutex_unlock(&card->discipline_mutex);
1071         return 0;
1072
1073 out_remove:
1074         qeth_l2_stop_card(card, 0);
1075         ccw_device_set_offline(CARD_DDEV(card));
1076         ccw_device_set_offline(CARD_WDEV(card));
1077         ccw_device_set_offline(CARD_RDEV(card));
1078         if (recover_flag == CARD_STATE_RECOVER)
1079                 card->state = CARD_STATE_RECOVER;
1080         else
1081                 card->state = CARD_STATE_DOWN;
1082         mutex_unlock(&card->conf_mutex);
1083         mutex_unlock(&card->discipline_mutex);
1084         return rc;
1085 }
1086
1087 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1088 {
1089         return __qeth_l2_set_online(gdev, 0);
1090 }
1091
1092 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1093                                         int recovery_mode)
1094 {
1095         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1096         int rc = 0, rc2 = 0, rc3 = 0;
1097         enum qeth_card_states recover_flag;
1098
1099         mutex_lock(&card->discipline_mutex);
1100         mutex_lock(&card->conf_mutex);
1101         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1102         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1103
1104         if (card->dev && netif_carrier_ok(card->dev))
1105                 netif_carrier_off(card->dev);
1106         recover_flag = card->state;
1107         if ((!recovery_mode && card->info.hwtrap) || card->info.hwtrap == 2) {
1108                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1109                 card->info.hwtrap = 1;
1110         }
1111         qeth_l2_stop_card(card, recovery_mode);
1112         rc  = ccw_device_set_offline(CARD_DDEV(card));
1113         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1114         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1115         if (!rc)
1116                 rc = (rc2) ? rc2 : rc3;
1117         if (rc)
1118                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1119         if (recover_flag == CARD_STATE_UP)
1120                 card->state = CARD_STATE_RECOVER;
1121         /* let user_space know that device is offline */
1122         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1123         mutex_unlock(&card->conf_mutex);
1124         mutex_unlock(&card->discipline_mutex);
1125         return 0;
1126 }
1127
1128 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1129 {
1130         return __qeth_l2_set_offline(cgdev, 0);
1131 }
1132
1133 static int qeth_l2_recover(void *ptr)
1134 {
1135         struct qeth_card *card;
1136         int rc = 0;
1137
1138         card = (struct qeth_card *) ptr;
1139         QETH_CARD_TEXT(card, 2, "recover1");
1140         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1141                 return 0;
1142         QETH_CARD_TEXT(card, 2, "recover2");
1143         dev_warn(&card->gdev->dev,
1144                 "A recovery process has been started for the device\n");
1145         __qeth_l2_set_offline(card->gdev, 1);
1146         rc = __qeth_l2_set_online(card->gdev, 1);
1147         if (!rc)
1148                 dev_info(&card->gdev->dev,
1149                         "Device successfully recovered!\n");
1150         else {
1151                 rtnl_lock();
1152                 dev_close(card->dev);
1153                 rtnl_unlock();
1154                 dev_warn(&card->gdev->dev, "The qeth device driver "
1155                         "failed to recover an error on the device\n");
1156         }
1157         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1158         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1159         return 0;
1160 }
1161
1162 static int __init qeth_l2_init(void)
1163 {
1164         pr_info("register layer 2 discipline\n");
1165         return 0;
1166 }
1167
1168 static void __exit qeth_l2_exit(void)
1169 {
1170         pr_info("unregister layer 2 discipline\n");
1171 }
1172
1173 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1174 {
1175         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1176         qeth_set_allowed_threads(card, 0, 1);
1177         if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
1178                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1179         qeth_qdio_clear_card(card, 0);
1180         qeth_clear_qdio_buffers(card);
1181 }
1182
1183 static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev)
1184 {
1185         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1186
1187         if (card->dev)
1188                 netif_device_detach(card->dev);
1189         qeth_set_allowed_threads(card, 0, 1);
1190         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1191         if (gdev->state == CCWGROUP_OFFLINE)
1192                 return 0;
1193         if (card->state == CARD_STATE_UP) {
1194                 if (card->info.hwtrap)
1195                         qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1196                 __qeth_l2_set_offline(card->gdev, 1);
1197         } else
1198                 __qeth_l2_set_offline(card->gdev, 0);
1199         return 0;
1200 }
1201
1202 static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
1203 {
1204         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1205         int rc = 0;
1206
1207         if (gdev->state == CCWGROUP_OFFLINE)
1208                 goto out;
1209
1210         if (card->state == CARD_STATE_RECOVER) {
1211                 rc = __qeth_l2_set_online(card->gdev, 1);
1212                 if (rc) {
1213                         rtnl_lock();
1214                         dev_close(card->dev);
1215                         rtnl_unlock();
1216                 }
1217         } else
1218                 rc = __qeth_l2_set_online(card->gdev, 0);
1219 out:
1220         qeth_set_allowed_threads(card, 0xffffffff, 0);
1221         if (card->dev)
1222                 netif_device_attach(card->dev);
1223         if (rc)
1224                 dev_warn(&card->gdev->dev, "The qeth device driver "
1225                         "failed to recover an error on the device\n");
1226         return rc;
1227 }
1228
1229 struct ccwgroup_driver qeth_l2_ccwgroup_driver = {
1230         .probe = qeth_l2_probe_device,
1231         .remove = qeth_l2_remove_device,
1232         .set_online = qeth_l2_set_online,
1233         .set_offline = qeth_l2_set_offline,
1234         .shutdown = qeth_l2_shutdown,
1235         .freeze = qeth_l2_pm_suspend,
1236         .thaw = qeth_l2_pm_resume,
1237         .restore = qeth_l2_pm_resume,
1238 };
1239 EXPORT_SYMBOL_GPL(qeth_l2_ccwgroup_driver);
1240
1241 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1242                            struct qeth_cmd_buffer *iob)
1243 {
1244         unsigned long flags;
1245         int rc = 0;
1246
1247         QETH_CARD_TEXT(card, 5, "osndctrd");
1248
1249         wait_event(card->wait_q,
1250                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1251         qeth_prepare_control_data(card, len, iob);
1252         QETH_CARD_TEXT(card, 6, "osnoirqp");
1253         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1254         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1255                               (addr_t) iob, 0, 0);
1256         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1257         if (rc) {
1258                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1259                            "ccw_device_start rc = %i\n", rc);
1260                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1261                 qeth_release_buffer(iob->channel, iob);
1262                 atomic_set(&card->write.irq_pending, 0);
1263                 wake_up(&card->wait_q);
1264         }
1265         return rc;
1266 }
1267
1268 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1269                         struct qeth_cmd_buffer *iob, int data_len)
1270 {
1271         u16 s1, s2;
1272
1273         QETH_CARD_TEXT(card, 4, "osndipa");
1274
1275         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1276         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1277         s2 = (u16)data_len;
1278         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1279         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1280         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1281         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1282         return qeth_osn_send_control_data(card, s1, iob);
1283 }
1284
1285 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1286 {
1287         struct qeth_cmd_buffer *iob;
1288         struct qeth_card *card;
1289         int rc;
1290
1291         if (!dev)
1292                 return -ENODEV;
1293         card = dev->ml_priv;
1294         if (!card)
1295                 return -ENODEV;
1296         QETH_CARD_TEXT(card, 2, "osnsdmc");
1297         if ((card->state != CARD_STATE_UP) &&
1298             (card->state != CARD_STATE_SOFTSETUP))
1299                 return -ENODEV;
1300         iob = qeth_wait_for_buffer(&card->write);
1301         memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1302         rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1303         return rc;
1304 }
1305 EXPORT_SYMBOL(qeth_osn_assist);
1306
1307 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1308                   int (*assist_cb)(struct net_device *, void *),
1309                   int (*data_cb)(struct sk_buff *))
1310 {
1311         struct qeth_card *card;
1312
1313         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1314         if (*dev == NULL)
1315                 return -ENODEV;
1316         card = (*dev)->ml_priv;
1317         if (!card)
1318                 return -ENODEV;
1319         QETH_CARD_TEXT(card, 2, "osnreg");
1320         if ((assist_cb == NULL) || (data_cb == NULL))
1321                 return -EINVAL;
1322         card->osn_info.assist_cb = assist_cb;
1323         card->osn_info.data_cb = data_cb;
1324         return 0;
1325 }
1326 EXPORT_SYMBOL(qeth_osn_register);
1327
1328 void qeth_osn_deregister(struct net_device *dev)
1329 {
1330         struct qeth_card *card;
1331
1332         if (!dev)
1333                 return;
1334         card = dev->ml_priv;
1335         if (!card)
1336                 return;
1337         QETH_CARD_TEXT(card, 2, "osndereg");
1338         card->osn_info.assist_cb = NULL;
1339         card->osn_info.data_cb = NULL;
1340         return;
1341 }
1342 EXPORT_SYMBOL(qeth_osn_deregister);
1343
1344 module_init(qeth_l2_init);
1345 module_exit(qeth_l2_exit);
1346 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1347 MODULE_DESCRIPTION("qeth layer 2 discipline");
1348 MODULE_LICENSE("GPL");