drivers/s390/net/qeth_l2_main.c

   1 /*
   2  *  drivers/s390/net/qeth_l2_main.c
   3  *
   4  *    Copyright IBM Corp. 2007
   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 #include <linux/module.h>
  12 #include <linux/moduleparam.h>
  13 #include <linux/string.h>
  14 #include <linux/errno.h>
  15 #include <linux/kernel.h>
  16 #include <linux/etherdevice.h>
  17 #include <linux/mii.h>
  18 #include <linux/ip.h>
  19
  20 #include <asm/s390_rdev.h>
  21
  22 #include "qeth_core.h"
  23 #include "qeth_core_offl.h"
  24
  25 static int qeth_l2_set_offline(struct ccwgroup_device *);
  26 static int qeth_l2_stop(struct net_device *);
  27 static int qeth_l2_send_delmac(struct qeth_card *, __u8 *);
  28 static int qeth_l2_send_setdelmac(struct qeth_card *, __u8 *,
  29                            enum qeth_ipa_cmds,
  30                            int (*reply_cb) (struct qeth_card *,
  31                                             struct qeth_reply*,
  32                                             unsigned long));
  33 static void qeth_l2_set_multicast_list(struct net_device *);
  34 static int qeth_l2_recover(void *);
  35
  36 static int qeth_l2_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
  37 {
  38         struct qeth_card *card = netdev_priv(dev);
  39         struct mii_ioctl_data *mii_data;
  40         int rc = 0;
  41
  42         if (!card)
  43                 return -ENODEV;
  44
  45         if ((card->state != CARD_STATE_UP) &&
  46                 (card->state != CARD_STATE_SOFTSETUP))
  47                 return -ENODEV;
  48
  49         if (card->info.type == QETH_CARD_TYPE_OSN)
  50                 return -EPERM;
  51
  52         switch (cmd) {
  53         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
  54                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
  55                 break;
  56         case SIOC_QETH_GET_CARD_TYPE:
  57                 if ((card->info.type == QETH_CARD_TYPE_OSAE) &&
  58                     !card->info.guestlan)
  59                         return 1;
  60                 return 0;
  61                 break;
  62         case SIOCGMIIPHY:
  63                 mii_data = if_mii(rq);
  64                 mii_data->phy_id = 0;
  65                 break;
  66         case SIOCGMIIREG:
  67                 mii_data = if_mii(rq);
  68                 if (mii_data->phy_id != 0)
  69                         rc = -EINVAL;
  70                 else
  71                         mii_data->val_out = qeth_mdio_read(dev,
  72                                 mii_data->phy_id, mii_data->reg_num);
  73                 break;
  74         default:
  75                 rc = -EOPNOTSUPP;
  76         }
  77         if (rc)
  78                 QETH_DBF_TEXT_(TRACE, 2, "ioce%d", rc);
  79         return rc;
  80 }
  81
  82 static int qeth_l2_verify_dev(struct net_device *dev)
  83 {
  84         struct qeth_card *card;
  85         unsigned long flags;
  86         int rc = 0;
  87
  88         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
  89         list_for_each_entry(card, &qeth_core_card_list.list, list) {
  90                 if (card->dev == dev) {
  91                         rc = QETH_REAL_CARD;
  92                         break;
  93                 }
  94         }
  95         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
  96
  97         return rc;
  98 }
  99
 100 static struct net_device *qeth_l2_netdev_by_devno(unsigned char *read_dev_no)
 101 {
 102         struct qeth_card *card;
 103         struct net_device *ndev;
 104         __u16 temp_dev_no;
 105         unsigned long flags;
 106         struct ccw_dev_id read_devid;
 107
 108         ndev = NULL;
 109         memcpy(&temp_dev_no, read_dev_no, 2);
 110         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
 111         list_for_each_entry(card, &qeth_core_card_list.list, list) {
 112                 ccw_device_get_id(CARD_RDEV(card), &read_devid);
 113                 if (read_devid.devno == temp_dev_no) {
 114                         ndev = card->dev;
 115                         break;
 116                 }
 117         }
 118         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
 119         return ndev;
 120 }
 121
 122 static int qeth_l2_send_setgroupmac_cb(struct qeth_card *card,
 123                                 struct qeth_reply *reply,
 124                                 unsigned long data)
 125 {
 126         struct qeth_ipa_cmd *cmd;
 127         __u8 *mac;
 128
 129         QETH_DBF_TEXT(TRACE, 2, "L2Sgmacb");
 130         cmd = (struct qeth_ipa_cmd *) data;
 131         mac = &cmd->data.setdelmac.mac[0];
 132         /* MAC already registered, needed in couple/uncouple case */
 133         if (cmd->hdr.return_code == 0x2005) {
 134                 QETH_DBF_MESSAGE(2, "Group MAC %02x:%02x:%02x:%02x:%02x:%02x "
 135                           "already existing on %s \n",
 136                           mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
 137                           QETH_CARD_IFNAME(card));
 138                 cmd->hdr.return_code = 0;
 139         }
 140         if (cmd->hdr.return_code)
 141                 QETH_DBF_MESSAGE(2, "Could not set group MAC "
 142                           "%02x:%02x:%02x:%02x:%02x:%02x on %s: %x\n",
 143                           mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
 144                           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_DBF_TEXT(TRACE, 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_DBF_TEXT(TRACE, 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 "
 167                           "%02x:%02x:%02x:%02x:%02x:%02x on %s: %x\n",
 168                           mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
 169                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 170         return 0;
 171 }
 172
 173 static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac)
 174 {
 175         QETH_DBF_TEXT(TRACE, 2, "L2Dgmac");
 176         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELGMAC,
 177                                           qeth_l2_send_delgroupmac_cb);
 178 }
 179
 180 static void qeth_l2_add_mc(struct qeth_card *card, __u8 *mac)
 181 {
 182         struct qeth_mc_mac *mc;
 183
 184         mc = kmalloc(sizeof(struct qeth_mc_mac), GFP_ATOMIC);
 185
 186         if (!mc)
 187                 return;
 188
 189         memcpy(mc->mc_addr, mac, OSA_ADDR_LEN);
 190         mc->mc_addrlen = OSA_ADDR_LEN;
 191
 192         if (!qeth_l2_send_setgroupmac(card, mac))
 193                 list_add_tail(&mc->list, &card->mc_list);
 194         else
 195                 kfree(mc);
 196 }
 197
 198 static void qeth_l2_del_all_mc(struct qeth_card *card)
 199 {
 200         struct qeth_mc_mac *mc, *tmp;
 201
 202         spin_lock_bh(&card->mclock);
 203         list_for_each_entry_safe(mc, tmp, &card->mc_list, list) {
 204                 qeth_l2_send_delgroupmac(card, mc->mc_addr);
 205                 list_del(&mc->list);
 206                 kfree(mc);
 207         }
 208         spin_unlock_bh(&card->mclock);
 209 }
 210
 211 static void qeth_l2_get_packet_type(struct qeth_card *card,
 212                         struct qeth_hdr *hdr, struct sk_buff *skb)
 213 {
 214         __u16 hdr_mac;
 215
 216         if (!memcmp(skb->data + QETH_HEADER_SIZE,
 217                     skb->dev->broadcast, 6)) {
 218                 /* broadcast? */
 219                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 220                 return;
 221         }
 222         hdr_mac = *((__u16 *)skb->data);
 223         /* tr multicast? */
 224         switch (card->info.link_type) {
 225         case QETH_LINK_TYPE_HSTR:
 226         case QETH_LINK_TYPE_LANE_TR:
 227                 if ((hdr_mac == QETH_TR_MAC_NC) ||
 228                     (hdr_mac == QETH_TR_MAC_C))
 229                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 230                 else
 231                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 232                 break;
 233                 /* eth or so multicast? */
 234         default:
 235                 if ((hdr_mac == QETH_ETH_MAC_V4) ||
 236                      (hdr_mac == QETH_ETH_MAC_V6))
 237                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 238                 else
 239                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 240         }
 241 }
 242
 243 static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
 244                         struct sk_buff *skb, int ipv, int cast_type)
 245 {
 246         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)((skb->data) +
 247                                         QETH_HEADER_SIZE);
 248
 249         memset(hdr, 0, sizeof(struct qeth_hdr));
 250         hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
 251
 252         /* set byte byte 3 to casting flags */
 253         if (cast_type == RTN_MULTICAST)
 254                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 255         else if (cast_type == RTN_BROADCAST)
 256                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 257         else
 258                 qeth_l2_get_packet_type(card, hdr, skb);
 259
 260         hdr->hdr.l2.pkt_length = skb->len-QETH_HEADER_SIZE;
 261         /* VSWITCH relies on the VLAN
 262          * information to be present in
 263          * the QDIO header */
 264         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
 265                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
 266                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
 267         }
 268 }
 269
 270 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
 271                         struct qeth_reply *reply, unsigned long data)
 272 {
 273         struct qeth_ipa_cmd *cmd;
 274
 275         QETH_DBF_TEXT(TRACE, 2, "L2sdvcb");
 276         cmd = (struct qeth_ipa_cmd *) data;
 277         if (cmd->hdr.return_code) {
 278                 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x. "
 279                           "Continuing\n", cmd->data.setdelvlan.vlan_id,
 280                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 281                 QETH_DBF_TEXT_(TRACE, 2, "L2VL%4x", cmd->hdr.command);
 282                 QETH_DBF_TEXT_(TRACE, 2, "L2%s", CARD_BUS_ID(card));
 283                 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
 284         }
 285         return 0;
 286 }
 287
 288 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
 289                                 enum qeth_ipa_cmds ipacmd)
 290 {
 291         struct qeth_ipa_cmd *cmd;
 292         struct qeth_cmd_buffer *iob;
 293
 294         QETH_DBF_TEXT_(TRACE, 4, "L2sdv%x", ipacmd);
 295         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 296         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 297         cmd->data.setdelvlan.vlan_id = i;
 298         return qeth_send_ipa_cmd(card, iob,
 299                                  qeth_l2_send_setdelvlan_cb, NULL);
 300 }
 301
 302 static void qeth_l2_process_vlans(struct qeth_card *card, int clear)
 303 {
 304         struct qeth_vlan_vid *id;
 305         QETH_DBF_TEXT(TRACE, 3, "L2prcvln");
 306         spin_lock_bh(&card->vlanlock);
 307         list_for_each_entry(id, &card->vid_list, list) {
 308                 if (clear)
 309                         qeth_l2_send_setdelvlan(card, id->vid,
 310                                 IPA_CMD_DELVLAN);
 311                 else
 312                         qeth_l2_send_setdelvlan(card, id->vid,
 313                                 IPA_CMD_SETVLAN);
 314         }
 315         spin_unlock_bh(&card->vlanlock);
 316 }
 317
 318 static void qeth_l2_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
 319 {
 320         struct qeth_card *card = netdev_priv(dev);
 321         struct qeth_vlan_vid *id;
 322
 323         QETH_DBF_TEXT_(TRACE, 4, "aid:%d", vid);
 324         id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
 325         if (id) {
 326                 id->vid = vid;
 327                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
 328                 spin_lock_bh(&card->vlanlock);
 329                 list_add_tail(&id->list, &card->vid_list);
 330                 spin_unlock_bh(&card->vlanlock);
 331         }
 332 }
 333
 334 static void qeth_l2_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
 335 {
 336         struct qeth_vlan_vid *id, *tmpid = NULL;
 337         struct qeth_card *card = netdev_priv(dev);
 338
 339         QETH_DBF_TEXT_(TRACE, 4, "kid:%d", vid);
 340         spin_lock_bh(&card->vlanlock);
 341         list_for_each_entry(id, &card->vid_list, list) {
 342                 if (id->vid == vid) {
 343                         list_del(&id->list);
 344                         tmpid = id;
 345                         break;
 346                 }
 347         }
 348         spin_unlock_bh(&card->vlanlock);
 349         if (tmpid) {
 350                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 351                 kfree(tmpid);
 352         }
 353         qeth_l2_set_multicast_list(card->dev);
 354 }
 355
 356 static int qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
 357 {
 358         int rc = 0;
 359
 360         QETH_DBF_TEXT(SETUP , 2, "stopcard");
 361         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 362
 363         qeth_set_allowed_threads(card, 0, 1);
 364         if (qeth_wait_for_threads(card, ~QETH_RECOVER_THREAD))
 365                 return -ERESTARTSYS;
 366         if (card->read.state == CH_STATE_UP &&
 367             card->write.state == CH_STATE_UP &&
 368             (card->state == CARD_STATE_UP)) {
 369                 if (recovery_mode &&
 370                     card->info.type != QETH_CARD_TYPE_OSN) {
 371                         qeth_l2_stop(card->dev);
 372                 } else {
 373                         rtnl_lock();
 374                         dev_close(card->dev);
 375                         rtnl_unlock();
 376                 }
 377                 if (!card->use_hard_stop) {
 378                         __u8 *mac = &card->dev->dev_addr[0];
 379                         rc = qeth_l2_send_delmac(card, mac);
 380                         QETH_DBF_TEXT_(SETUP, 2, "Lerr%d", rc);
 381                 }
 382                 card->state = CARD_STATE_SOFTSETUP;
 383         }
 384         if (card->state == CARD_STATE_SOFTSETUP) {
 385                 qeth_l2_process_vlans(card, 1);
 386                 qeth_l2_del_all_mc(card);
 387                 qeth_clear_ipacmd_list(card);
 388                 card->state = CARD_STATE_HARDSETUP;
 389         }
 390         if (card->state == CARD_STATE_HARDSETUP) {
 391                 qeth_qdio_clear_card(card, 0);
 392                 qeth_clear_qdio_buffers(card);
 393                 qeth_clear_working_pool_list(card);
 394                 card->state = CARD_STATE_DOWN;
 395         }
 396         if (card->state == CARD_STATE_DOWN) {
 397                 qeth_clear_cmd_buffers(&card->read);
 398                 qeth_clear_cmd_buffers(&card->write);
 399         }
 400         card->use_hard_stop = 0;
 401         return rc;
 402 }
 403
 404 static void qeth_l2_process_inbound_buffer(struct qeth_card *card,
 405                             struct qeth_qdio_buffer *buf, int index)
 406 {
 407         struct qdio_buffer_element *element;
 408         struct sk_buff *skb;
 409         struct qeth_hdr *hdr;
 410         int offset;
 411         unsigned int len;
 412
 413         /* get first element of current buffer */
 414         element = (struct qdio_buffer_element *)&buf->buffer->element[0];
 415         offset = 0;
 416         if (card->options.performance_stats)
 417                 card->perf_stats.bufs_rec++;
 418         while ((skb = qeth_core_get_next_skb(card, buf->buffer, &element,
 419                                        &offset, &hdr))) {
 420                 skb->dev = card->dev;
 421                 /* is device UP ? */
 422                 if (!(card->dev->flags & IFF_UP)) {
 423                         dev_kfree_skb_any(skb);
 424                         continue;
 425                 }
 426
 427                 switch (hdr->hdr.l2.id) {
 428                 case QETH_HEADER_TYPE_LAYER2:
 429                         skb->pkt_type = PACKET_HOST;
 430                         skb->protocol = eth_type_trans(skb, skb->dev);
 431                         if (card->options.checksum_type == NO_CHECKSUMMING)
 432                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 433                         else
 434                                 skb->ip_summed = CHECKSUM_NONE;
 435                         if (skb->protocol == htons(ETH_P_802_2))
 436                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
 437                         len = skb->len;
 438                         netif_rx(skb);
 439                         break;
 440                 case QETH_HEADER_TYPE_OSN:
 441                         skb_push(skb, sizeof(struct qeth_hdr));
 442                         skb_copy_to_linear_data(skb, hdr,
 443                                                 sizeof(struct qeth_hdr));
 444                         len = skb->len;
 445                         card->osn_info.data_cb(skb);
 446                         break;
 447                 default:
 448                         dev_kfree_skb_any(skb);
 449                         QETH_DBF_TEXT(TRACE, 3, "inbunkno");
 450                         QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
 451                         continue;
 452                 }
 453                 card->dev->last_rx = jiffies;
 454                 card->stats.rx_packets++;
 455                 card->stats.rx_bytes += len;
 456         }
 457 }
 458
 459 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
 460                            enum qeth_ipa_cmds ipacmd,
 461                            int (*reply_cb) (struct qeth_card *,
 462                                             struct qeth_reply*,
 463                                             unsigned long))
 464 {
 465         struct qeth_ipa_cmd *cmd;
 466         struct qeth_cmd_buffer *iob;
 467
 468         QETH_DBF_TEXT(TRACE, 2, "L2sdmac");
 469         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 470         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 471         cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
 472         memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
 473         return qeth_send_ipa_cmd(card, iob, reply_cb, NULL);
 474 }
 475
 476 static int qeth_l2_send_setmac_cb(struct qeth_card *card,
 477                            struct qeth_reply *reply,
 478                            unsigned long data)
 479 {
 480         struct qeth_ipa_cmd *cmd;
 481
 482         QETH_DBF_TEXT(TRACE, 2, "L2Smaccb");
 483         cmd = (struct qeth_ipa_cmd *) data;
 484         if (cmd->hdr.return_code) {
 485                 QETH_DBF_TEXT_(TRACE, 2, "L2er%x", cmd->hdr.return_code);
 486                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 487                 cmd->hdr.return_code = -EIO;
 488         } else {
 489                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 490                 memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
 491                        OSA_ADDR_LEN);
 492                 PRINT_INFO("MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x "
 493                            "successfully registered on device %s\n",
 494                            card->dev->dev_addr[0], card->dev->dev_addr[1],
 495                            card->dev->dev_addr[2], card->dev->dev_addr[3],
 496                            card->dev->dev_addr[4], card->dev->dev_addr[5],
 497                            card->dev->name);
 498         }
 499         return 0;
 500 }
 501
 502 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
 503 {
 504         QETH_DBF_TEXT(TRACE, 2, "L2Setmac");
 505         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
 506                                           qeth_l2_send_setmac_cb);
 507 }
 508
 509 static int qeth_l2_send_delmac_cb(struct qeth_card *card,
 510                            struct qeth_reply *reply,
 511                            unsigned long data)
 512 {
 513         struct qeth_ipa_cmd *cmd;
 514
 515         QETH_DBF_TEXT(TRACE, 2, "L2Dmaccb");
 516         cmd = (struct qeth_ipa_cmd *) data;
 517         if (cmd->hdr.return_code) {
 518                 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
 519                 cmd->hdr.return_code = -EIO;
 520                 return 0;
 521         }
 522         card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 523
 524         return 0;
 525 }
 526
 527 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
 528 {
 529         QETH_DBF_TEXT(TRACE, 2, "L2Delmac");
 530         if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
 531                 return 0;
 532         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
 533                                           qeth_l2_send_delmac_cb);
 534 }
 535
 536 static int qeth_l2_request_initial_mac(struct qeth_card *card)
 537 {
 538         int rc = 0;
 539         char vendor_pre[] = {0x02, 0x00, 0x00};
 540
 541         QETH_DBF_TEXT(SETUP, 2, "doL2init");
 542         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
 543
 544         rc = qeth_query_setadapterparms(card);
 545         if (rc) {
 546                 QETH_DBF_MESSAGE(2, "could not query adapter parameters on "
 547                         "device %s: x%x\n", CARD_BUS_ID(card), rc);
 548         }
 549
 550         if (card->info.guestlan) {
 551                 rc = qeth_setadpparms_change_macaddr(card);
 552                 if (rc) {
 553                         QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
 554                                 "device %s: x%x\n", CARD_BUS_ID(card), rc);
 555                         QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 556                         return rc;
 557                 }
 558                 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN);
 559         } else {
 560                 random_ether_addr(card->dev->dev_addr);
 561                 memcpy(card->dev->dev_addr, vendor_pre, 3);
 562         }
 563         return 0;
 564 }
 565
 566 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 567 {
 568         struct sockaddr *addr = p;
 569         struct qeth_card *card = netdev_priv(dev);
 570         int rc = 0;
 571
 572         QETH_DBF_TEXT(TRACE, 3, "setmac");
 573
 574         if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
 575                 QETH_DBF_TEXT(TRACE, 3, "setmcINV");
 576                 return -EOPNOTSUPP;
 577         }
 578
 579         if (card->info.type == QETH_CARD_TYPE_OSN) {
 580                 QETH_DBF_TEXT(TRACE, 3, "setmcOSN");
 581                 return -EOPNOTSUPP;
 582         }
 583         QETH_DBF_TEXT_(TRACE, 3, "%s", CARD_BUS_ID(card));
 584         QETH_DBF_HEX(TRACE, 3, addr->sa_data, OSA_ADDR_LEN);
 585         rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
 586         if (!rc)
 587                 rc = qeth_l2_send_setmac(card, addr->sa_data);
 588         return rc;
 589 }
 590
 591 static void qeth_l2_set_multicast_list(struct net_device *dev)
 592 {
 593         struct qeth_card *card = netdev_priv(dev);
 594         struct dev_mc_list *dm;
 595
 596         if (card->info.type == QETH_CARD_TYPE_OSN)
 597                 return ;
 598
 599         QETH_DBF_TEXT(TRACE, 3, "setmulti");
 600         qeth_l2_del_all_mc(card);
 601         spin_lock_bh(&card->mclock);
 602         for (dm = dev->mc_list; dm; dm = dm->next)
 603                 qeth_l2_add_mc(card, dm->dmi_addr);
 604         spin_unlock_bh(&card->mclock);
 605         if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
 606                 return;
 607         qeth_setadp_promisc_mode(card);
 608 }
 609
 610 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 611 {
 612         int rc;
 613         struct qeth_hdr *hdr = NULL;
 614         int elements = 0;
 615         struct qeth_card *card = netdev_priv(dev);
 616         struct sk_buff *new_skb = skb;
 617         int ipv = qeth_get_ip_version(skb);
 618         int cast_type = qeth_get_cast_type(card, skb);
 619         struct qeth_qdio_out_q *queue = card->qdio.out_qs
 620                 [qeth_get_priority_queue(card, skb, ipv, cast_type)];
 621         int tx_bytes = skb->len;
 622         enum qeth_large_send_types large_send = QETH_LARGE_SEND_NO;
 623         struct qeth_eddp_context *ctx = NULL;
 624
 625         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
 626                 card->stats.tx_carrier_errors++;
 627                 goto tx_drop;
 628         }
 629
 630         if ((card->info.type == QETH_CARD_TYPE_OSN) &&
 631             (skb->protocol == htons(ETH_P_IPV6)))
 632                 goto tx_drop;
 633
 634         if (card->options.performance_stats) {
 635                 card->perf_stats.outbound_cnt++;
 636                 card->perf_stats.outbound_start_time = qeth_get_micros();
 637         }
 638         netif_stop_queue(dev);
 639
 640         if (skb_is_gso(skb))
 641                 large_send = QETH_LARGE_SEND_EDDP;
 642
 643         if (card->info.type == QETH_CARD_TYPE_OSN)
 644                 hdr = (struct qeth_hdr *)skb->data;
 645         else {
 646                 /* create a clone with writeable headroom */
 647                 new_skb = skb_realloc_headroom(skb, sizeof(struct qeth_hdr));
 648                 if (!new_skb)
 649                         goto tx_drop;
 650                 hdr = (struct qeth_hdr *)skb_push(new_skb,
 651                                                 sizeof(struct qeth_hdr));
 652                 qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 653         }
 654
 655         if (large_send == QETH_LARGE_SEND_EDDP) {
 656                 ctx = qeth_eddp_create_context(card, new_skb, hdr,
 657                                                 skb->sk->sk_protocol);
 658                 if (ctx == NULL) {
 659                         QETH_DBF_MESSAGE(2, "could not create eddp context\n");
 660                         goto tx_drop;
 661                 }
 662         } else {
 663                 elements = qeth_get_elements_no(card, (void *)hdr, new_skb, 0);
 664                 if (!elements)
 665                         goto tx_drop;
 666         }
 667
 668         if ((large_send == QETH_LARGE_SEND_NO) &&
 669             (skb->ip_summed == CHECKSUM_PARTIAL))
 670                 qeth_tx_csum(new_skb);
 671
 672         if (card->info.type != QETH_CARD_TYPE_IQD)
 673                 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
 674                                          elements, ctx);
 675         else
 676                 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
 677                                               elements, ctx);
 678         if (!rc) {
 679                 card->stats.tx_packets++;
 680                 card->stats.tx_bytes += tx_bytes;
 681                 if (new_skb != skb)
 682                         dev_kfree_skb_any(skb);
 683                 if (card->options.performance_stats) {
 684                         if (large_send != QETH_LARGE_SEND_NO) {
 685                                 card->perf_stats.large_send_bytes += tx_bytes;
 686                                 card->perf_stats.large_send_cnt++;
 687                         }
 688                         if (skb_shinfo(new_skb)->nr_frags > 0) {
 689                                 card->perf_stats.sg_skbs_sent++;
 690                                 /* nr_frags + skb->data */
 691                                 card->perf_stats.sg_frags_sent +=
 692                                         skb_shinfo(new_skb)->nr_frags + 1;
 693                         }
 694                 }
 695
 696                 if (ctx != NULL) {
 697                         qeth_eddp_put_context(ctx);
 698                         dev_kfree_skb_any(new_skb);
 699                 }
 700         } else {
 701                 if (ctx != NULL)
 702                         qeth_eddp_put_context(ctx);
 703
 704                 if (rc == -EBUSY) {
 705                         if (new_skb != skb)
 706                                 dev_kfree_skb_any(new_skb);
 707                         return NETDEV_TX_BUSY;
 708                 } else
 709                         goto tx_drop;
 710         }
 711
 712         netif_wake_queue(dev);
 713         if (card->options.performance_stats)
 714                 card->perf_stats.outbound_time += qeth_get_micros() -
 715                         card->perf_stats.outbound_start_time;
 716         return rc;
 717
 718 tx_drop:
 719         card->stats.tx_dropped++;
 720         card->stats.tx_errors++;
 721         if ((new_skb != skb) && new_skb)
 722                 dev_kfree_skb_any(new_skb);
 723         dev_kfree_skb_any(skb);
 724         netif_wake_queue(dev);
 725         return NETDEV_TX_OK;
 726 }
 727
 728 static void qeth_l2_qdio_input_handler(struct ccw_device *ccwdev,
 729                         unsigned int status, unsigned int qdio_err,
 730                         unsigned int siga_err, unsigned int queue,
 731                         int first_element, int count, unsigned long card_ptr)
 732 {
 733         struct net_device *net_dev;
 734         struct qeth_card *card;
 735         struct qeth_qdio_buffer *buffer;
 736         int index;
 737         int i;
 738
 739         card = (struct qeth_card *) card_ptr;
 740         net_dev = card->dev;
 741         if (card->options.performance_stats) {
 742                 card->perf_stats.inbound_cnt++;
 743                 card->perf_stats.inbound_start_time = qeth_get_micros();
 744         }
 745         if (status & QDIO_STATUS_LOOK_FOR_ERROR) {
 746                 if (status & QDIO_STATUS_ACTIVATE_CHECK_CONDITION) {
 747                         QETH_DBF_TEXT(TRACE, 1, "qdinchk");
 748                         QETH_DBF_TEXT_(TRACE, 1, "%s", CARD_BUS_ID(card));
 749                         QETH_DBF_TEXT_(TRACE, 1, "%04X%04X", first_element,
 750                                         count);
 751                         QETH_DBF_TEXT_(TRACE, 1, "%04X%04X", queue, status);
 752                         qeth_schedule_recovery(card);
 753                         return;
 754                 }
 755         }
 756         for (i = first_element; i < (first_element + count); ++i) {
 757                 index = i % QDIO_MAX_BUFFERS_PER_Q;
 758                 buffer = &card->qdio.in_q->bufs[index];
 759                 if (!((status & QDIO_STATUS_LOOK_FOR_ERROR) &&
 760                       qeth_check_qdio_errors(buffer->buffer,
 761                                              qdio_err, siga_err, "qinerr")))
 762                         qeth_l2_process_inbound_buffer(card, buffer, index);
 763                 /* clear buffer and give back to hardware */
 764                 qeth_put_buffer_pool_entry(card, buffer->pool_entry);
 765                 qeth_queue_input_buffer(card, index);
 766         }
 767         if (card->options.performance_stats)
 768                 card->perf_stats.inbound_time += qeth_get_micros() -
 769                         card->perf_stats.inbound_start_time;
 770 }
 771
 772 static int qeth_l2_open(struct net_device *dev)
 773 {
 774         struct qeth_card *card = netdev_priv(dev);
 775
 776         QETH_DBF_TEXT(TRACE, 4, "qethopen");
 777         if (card->state != CARD_STATE_SOFTSETUP)
 778                 return -ENODEV;
 779
 780         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
 781              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
 782                 QETH_DBF_TEXT(TRACE, 4, "nomacadr");
 783                 return -EPERM;
 784         }
 785         card->data.state = CH_STATE_UP;
 786         card->state = CARD_STATE_UP;
 787         card->dev->flags |= IFF_UP;
 788         netif_start_queue(dev);
 789
 790         if (!card->lan_online && netif_carrier_ok(dev))
 791                 netif_carrier_off(dev);
 792         return 0;
 793 }
 794
 795
 796 static int qeth_l2_stop(struct net_device *dev)
 797 {
 798         struct qeth_card *card = netdev_priv(dev);
 799
 800         QETH_DBF_TEXT(TRACE, 4, "qethstop");
 801         netif_tx_disable(dev);
 802         card->dev->flags &= ~IFF_UP;
 803         if (card->state == CARD_STATE_UP)
 804                 card->state = CARD_STATE_SOFTSETUP;
 805         return 0;
 806 }
 807
 808 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 809 {
 810         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 811
 812         INIT_LIST_HEAD(&card->vid_list);
 813         INIT_LIST_HEAD(&card->mc_list);
 814         card->options.layer2 = 1;
 815         card->discipline.input_handler = (qdio_handler_t *)
 816                 qeth_l2_qdio_input_handler;
 817         card->discipline.output_handler = (qdio_handler_t *)
 818                 qeth_qdio_output_handler;
 819         card->discipline.recover = qeth_l2_recover;
 820         return 0;
 821 }
 822
 823 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
 824 {
 825         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
 826
 827         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 828
 829         if (cgdev->state == CCWGROUP_ONLINE) {
 830                 card->use_hard_stop = 1;
 831                 qeth_l2_set_offline(cgdev);
 832         }
 833
 834         if (card->dev) {
 835                 unregister_netdev(card->dev);
 836                 card->dev = NULL;
 837         }
 838
 839         qeth_l2_del_all_mc(card);
 840         return;
 841 }
 842
 843 static int qeth_l2_ethtool_set_tso(struct net_device *dev, u32 data)
 844 {
 845         struct qeth_card *card = netdev_priv(dev);
 846
 847         if (data) {
 848                 if (card->options.large_send == QETH_LARGE_SEND_NO) {
 849                         card->options.large_send = QETH_LARGE_SEND_EDDP;
 850                         dev->features |= NETIF_F_TSO;
 851                 }
 852         } else {
 853                 dev->features &= ~NETIF_F_TSO;
 854                 card->options.large_send = QETH_LARGE_SEND_NO;
 855         }
 856         return 0;
 857 }
 858
 859 static struct ethtool_ops qeth_l2_ethtool_ops = {
 860         .get_link = ethtool_op_get_link,
 861         .get_tx_csum = ethtool_op_get_tx_csum,
 862         .set_tx_csum = ethtool_op_set_tx_hw_csum,
 863         .get_sg = ethtool_op_get_sg,
 864         .set_sg = ethtool_op_set_sg,
 865         .get_tso = ethtool_op_get_tso,
 866         .set_tso = qeth_l2_ethtool_set_tso,
 867         .get_strings = qeth_core_get_strings,
 868         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 869         .get_stats_count = qeth_core_get_stats_count,
 870         .get_drvinfo = qeth_core_get_drvinfo,
 871         .get_settings = qeth_core_ethtool_get_settings,
 872 };
 873
 874 static struct ethtool_ops qeth_l2_osn_ops = {
 875         .get_strings = qeth_core_get_strings,
 876         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 877         .get_stats_count = qeth_core_get_stats_count,
 878         .get_drvinfo = qeth_core_get_drvinfo,
 879 };
 880
 881 static int qeth_l2_setup_netdev(struct qeth_card *card)
 882 {
 883         switch (card->info.type) {
 884         case QETH_CARD_TYPE_OSAE:
 885                 card->dev = alloc_etherdev(0);
 886                 break;
 887         case QETH_CARD_TYPE_IQD:
 888                 card->dev = alloc_netdev(0, "hsi%d", ether_setup);
 889                 break;
 890         case QETH_CARD_TYPE_OSN:
 891                 card->dev = alloc_netdev(0, "osn%d", ether_setup);
 892                 card->dev->flags |= IFF_NOARP;
 893                 break;
 894         default:
 895                 card->dev = alloc_etherdev(0);
 896         }
 897
 898         if (!card->dev)
 899                 return -ENODEV;
 900
 901         card->dev->priv = card;
 902         card->dev->tx_timeout = &qeth_tx_timeout;
 903         card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
 904         card->dev->open = qeth_l2_open;
 905         card->dev->stop = qeth_l2_stop;
 906         card->dev->hard_start_xmit = qeth_l2_hard_start_xmit;
 907         card->dev->do_ioctl = qeth_l2_do_ioctl;
 908         card->dev->get_stats = qeth_get_stats;
 909         card->dev->change_mtu = qeth_change_mtu;
 910         card->dev->set_multicast_list = qeth_l2_set_multicast_list;
 911         card->dev->vlan_rx_kill_vid = qeth_l2_vlan_rx_kill_vid;
 912         card->dev->vlan_rx_add_vid = qeth_l2_vlan_rx_add_vid;
 913         card->dev->set_mac_address = qeth_l2_set_mac_address;
 914         card->dev->mtu = card->info.initial_mtu;
 915         if (card->info.type != QETH_CARD_TYPE_OSN)
 916                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops);
 917         else
 918                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops);
 919         card->dev->features |= NETIF_F_HW_VLAN_FILTER;
 920         card->info.broadcast_capable = 1;
 921         qeth_l2_request_initial_mac(card);
 922         SET_NETDEV_DEV(card->dev, &card->gdev->dev);
 923         return register_netdev(card->dev);
 924 }
 925
 926 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 927 {
 928         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 929         int rc = 0;
 930         enum qeth_card_states recover_flag;
 931
 932         BUG_ON(!card);
 933         QETH_DBF_TEXT(SETUP, 2, "setonlin");
 934         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 935
 936         qeth_set_allowed_threads(card, QETH_RECOVER_THREAD, 1);
 937         if (qeth_wait_for_threads(card, ~QETH_RECOVER_THREAD)) {
 938                 PRINT_WARN("set_online of card %s interrupted by user!\n",
 939                            CARD_BUS_ID(card));
 940                 return -ERESTARTSYS;
 941         }
 942
 943         recover_flag = card->state;
 944         rc = ccw_device_set_online(CARD_RDEV(card));
 945         if (rc) {
 946                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 947                 return -EIO;
 948         }
 949         rc = ccw_device_set_online(CARD_WDEV(card));
 950         if (rc) {
 951                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 952                 return -EIO;
 953         }
 954         rc = ccw_device_set_online(CARD_DDEV(card));
 955         if (rc) {
 956                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 957                 return -EIO;
 958         }
 959
 960         rc = qeth_core_hardsetup_card(card);
 961         if (rc) {
 962                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
 963                 goto out_remove;
 964         }
 965
 966         if (!card->dev && qeth_l2_setup_netdev(card))
 967                 goto out_remove;
 968
 969         if (card->info.type != QETH_CARD_TYPE_OSN)
 970                 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
 971
 972         card->state = CARD_STATE_HARDSETUP;
 973         qeth_print_status_message(card);
 974
 975         /* softsetup */
 976         QETH_DBF_TEXT(SETUP, 2, "softsetp");
 977
 978         rc = qeth_send_startlan(card);
 979         if (rc) {
 980                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 981                 if (rc == 0xe080) {
 982                         PRINT_WARN("LAN on card %s if offline! "
 983                                    "Waiting for STARTLAN from card.\n",
 984                                    CARD_BUS_ID(card));
 985                         card->lan_online = 0;
 986                 }
 987                 return rc;
 988         } else
 989                 card->lan_online = 1;
 990
 991         if (card->info.type != QETH_CARD_TYPE_OSN) {
 992                 qeth_set_large_send(card, card->options.large_send);
 993                 qeth_l2_process_vlans(card, 0);
 994         }
 995
 996         netif_tx_disable(card->dev);
 997
 998         rc = qeth_init_qdio_queues(card);
 999         if (rc) {
1000                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1001                 goto out_remove;
1002         }
1003         card->state = CARD_STATE_SOFTSETUP;
1004         netif_carrier_on(card->dev);
1005
1006         qeth_set_allowed_threads(card, 0xffffffff, 0);
1007         if (recover_flag == CARD_STATE_RECOVER) {
1008                 if (recovery_mode &&
1009                     card->info.type != QETH_CARD_TYPE_OSN) {
1010                         qeth_l2_open(card->dev);
1011                 } else {
1012                         rtnl_lock();
1013                         dev_open(card->dev);
1014                         rtnl_unlock();
1015                 }
1016                 /* this also sets saved unicast addresses */
1017                 qeth_l2_set_multicast_list(card->dev);
1018         }
1019         /* let user_space know that device is online */
1020         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1021         return 0;
1022 out_remove:
1023         card->use_hard_stop = 1;
1024         qeth_l2_stop_card(card, 0);
1025         ccw_device_set_offline(CARD_DDEV(card));
1026         ccw_device_set_offline(CARD_WDEV(card));
1027         ccw_device_set_offline(CARD_RDEV(card));
1028         if (recover_flag == CARD_STATE_RECOVER)
1029                 card->state = CARD_STATE_RECOVER;
1030         else
1031                 card->state = CARD_STATE_DOWN;
1032         return -ENODEV;
1033 }
1034
1035 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1036 {
1037         return __qeth_l2_set_online(gdev, 0);
1038 }
1039
1040 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1041                                         int recovery_mode)
1042 {
1043         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1044         int rc = 0, rc2 = 0, rc3 = 0;
1045         enum qeth_card_states recover_flag;
1046
1047         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1048         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1049
1050         if (card->dev && netif_carrier_ok(card->dev))
1051                 netif_carrier_off(card->dev);
1052         recover_flag = card->state;
1053         if (qeth_l2_stop_card(card, recovery_mode) == -ERESTARTSYS) {
1054                 PRINT_WARN("Stopping card %s interrupted by user!\n",
1055                            CARD_BUS_ID(card));
1056                 return -ERESTARTSYS;
1057         }
1058         rc  = ccw_device_set_offline(CARD_DDEV(card));
1059         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1060         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1061         if (!rc)
1062                 rc = (rc2) ? rc2 : rc3;
1063         if (rc)
1064                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1065         if (recover_flag == CARD_STATE_UP)
1066                 card->state = CARD_STATE_RECOVER;
1067         /* let user_space know that device is offline */
1068         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1069         return 0;
1070 }
1071
1072 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1073 {
1074         return __qeth_l2_set_offline(cgdev, 0);
1075 }
1076
1077 static int qeth_l2_recover(void *ptr)
1078 {
1079         struct qeth_card *card;
1080         int rc = 0;
1081
1082         card = (struct qeth_card *) ptr;
1083         QETH_DBF_TEXT(TRACE, 2, "recover1");
1084         QETH_DBF_HEX(TRACE, 2, &card, sizeof(void *));
1085         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1086                 return 0;
1087         QETH_DBF_TEXT(TRACE, 2, "recover2");
1088         PRINT_WARN("Recovery of device %s started ...\n",
1089                    CARD_BUS_ID(card));
1090         card->use_hard_stop = 1;
1091         __qeth_l2_set_offline(card->gdev, 1);
1092         rc = __qeth_l2_set_online(card->gdev, 1);
1093         /* don't run another scheduled recovery */
1094         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1095         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1096         if (!rc)
1097                 PRINT_INFO("Device %s successfully recovered!\n",
1098                            CARD_BUS_ID(card));
1099         else
1100                 PRINT_INFO("Device %s could not be recovered!\n",
1101                            CARD_BUS_ID(card));
1102         return 0;
1103 }
1104
1105 static int __init qeth_l2_init(void)
1106 {
1107         PRINT_INFO("register layer 2 discipline\n");
1108         return 0;
1109 }
1110
1111 static void __exit qeth_l2_exit(void)
1112 {
1113         PRINT_INFO("unregister layer 2 discipline\n");
1114 }
1115
1116 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1117 {
1118         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1119         qeth_qdio_clear_card(card, 0);
1120         qeth_clear_qdio_buffers(card);
1121 }
1122
1123 struct ccwgroup_driver qeth_l2_ccwgroup_driver = {
1124         .probe = qeth_l2_probe_device,
1125         .remove = qeth_l2_remove_device,
1126         .set_online = qeth_l2_set_online,
1127         .set_offline = qeth_l2_set_offline,
1128         .shutdown = qeth_l2_shutdown,
1129 };
1130 EXPORT_SYMBOL_GPL(qeth_l2_ccwgroup_driver);
1131
1132 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1133                            struct qeth_cmd_buffer *iob)
1134 {
1135         unsigned long flags;
1136         int rc = 0;
1137
1138         QETH_DBF_TEXT(TRACE, 5, "osndctrd");
1139
1140         wait_event(card->wait_q,
1141                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1142         qeth_prepare_control_data(card, len, iob);
1143         QETH_DBF_TEXT(TRACE, 6, "osnoirqp");
1144         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1145         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1146                               (addr_t) iob, 0, 0);
1147         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1148         if (rc) {
1149                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1150                            "ccw_device_start rc = %i\n", rc);
1151                 QETH_DBF_TEXT_(TRACE, 2, " err%d", rc);
1152                 qeth_release_buffer(iob->channel, iob);
1153                 atomic_set(&card->write.irq_pending, 0);
1154                 wake_up(&card->wait_q);
1155         }
1156         return rc;
1157 }
1158
1159 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1160                         struct qeth_cmd_buffer *iob, int data_len)
1161 {
1162         u16 s1, s2;
1163
1164         QETH_DBF_TEXT(TRACE, 4, "osndipa");
1165
1166         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1167         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1168         s2 = (u16)data_len;
1169         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1170         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1171         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1172         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1173         return qeth_osn_send_control_data(card, s1, iob);
1174 }
1175
1176 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1177 {
1178         struct qeth_cmd_buffer *iob;
1179         struct qeth_card *card;
1180         int rc;
1181
1182         QETH_DBF_TEXT(TRACE, 2, "osnsdmc");
1183         if (!dev)
1184                 return -ENODEV;
1185         card = netdev_priv(dev);
1186         if (!card)
1187                 return -ENODEV;
1188         if ((card->state != CARD_STATE_UP) &&
1189             (card->state != CARD_STATE_SOFTSETUP))
1190                 return -ENODEV;
1191         iob = qeth_wait_for_buffer(&card->write);
1192         memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1193         rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1194         return rc;
1195 }
1196 EXPORT_SYMBOL(qeth_osn_assist);
1197
1198 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1199                   int (*assist_cb)(struct net_device *, void *),
1200                   int (*data_cb)(struct sk_buff *))
1201 {
1202         struct qeth_card *card;
1203
1204         QETH_DBF_TEXT(TRACE, 2, "osnreg");
1205         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1206         if (*dev == NULL)
1207                 return -ENODEV;
1208         card = netdev_priv(*dev);
1209         if (!card)
1210                 return -ENODEV;
1211         if ((assist_cb == NULL) || (data_cb == NULL))
1212                 return -EINVAL;
1213         card->osn_info.assist_cb = assist_cb;
1214         card->osn_info.data_cb = data_cb;
1215         return 0;
1216 }
1217 EXPORT_SYMBOL(qeth_osn_register);
1218
1219 void qeth_osn_deregister(struct net_device *dev)
1220 {
1221         struct qeth_card *card;
1222
1223         QETH_DBF_TEXT(TRACE, 2, "osndereg");
1224         if (!dev)
1225                 return;
1226         card = netdev_priv(dev);
1227         if (!card)
1228                 return;
1229         card->osn_info.assist_cb = NULL;
1230         card->osn_info.data_cb = NULL;
1231         return;
1232 }
1233 EXPORT_SYMBOL(qeth_osn_deregister);
1234
1235 module_init(qeth_l2_init);
1236 module_exit(qeth_l2_exit);
1237 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1238 MODULE_DESCRIPTION("qeth layer 2 discipline");
1239 MODULE_LICENSE("GPL");