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   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 #define QETH_DBF_TEXT_(name, level, text...) \
  26         do { \
  27                 if (qeth_dbf_passes(qeth_dbf_##name, level)) { \
  28                         char *dbf_txt_buf = get_cpu_var(qeth_l2_dbf_txt_buf); \
  29                         sprintf(dbf_txt_buf, text); \
  30                         debug_text_event(qeth_dbf_##name, level, dbf_txt_buf); \
  31                         put_cpu_var(qeth_l2_dbf_txt_buf); \
  32                 } \
  33         } while (0)
  34
  35 static DEFINE_PER_CPU(char[256], qeth_l2_dbf_txt_buf);
  36
  37 static int qeth_l2_set_offline(struct ccwgroup_device *);
  38 static int qeth_l2_stop(struct net_device *);
  39 static int qeth_l2_send_delmac(struct qeth_card *, __u8 *);
  40 static int qeth_l2_send_setdelmac(struct qeth_card *, __u8 *,
  41                            enum qeth_ipa_cmds,
  42                            int (*reply_cb) (struct qeth_card *,
  43                                             struct qeth_reply*,
  44                                             unsigned long));
  45 static void qeth_l2_set_multicast_list(struct net_device *);
  46 static int qeth_l2_recover(void *);
  47
  48 static int qeth_l2_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
  49 {
  50         struct qeth_card *card = netdev_priv(dev);
  51         struct mii_ioctl_data *mii_data;
  52         int rc = 0;
  53
  54         if (!card)
  55                 return -ENODEV;
  56
  57         if ((card->state != CARD_STATE_UP) &&
  58                 (card->state != CARD_STATE_SOFTSETUP))
  59                 return -ENODEV;
  60
  61         if (card->info.type == QETH_CARD_TYPE_OSN)
  62                 return -EPERM;
  63
  64         switch (cmd) {
  65         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
  66                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
  67                 break;
  68         case SIOC_QETH_GET_CARD_TYPE:
  69                 if ((card->info.type == QETH_CARD_TYPE_OSAE) &&
  70                     !card->info.guestlan)
  71                         return 1;
  72                 return 0;
  73                 break;
  74         case SIOCGMIIPHY:
  75                 mii_data = if_mii(rq);
  76                 mii_data->phy_id = 0;
  77                 break;
  78         case SIOCGMIIREG:
  79                 mii_data = if_mii(rq);
  80                 if (mii_data->phy_id != 0)
  81                         rc = -EINVAL;
  82                 else
  83                         mii_data->val_out = qeth_mdio_read(dev,
  84                                 mii_data->phy_id, mii_data->reg_num);
  85                 break;
  86         default:
  87                 rc = -EOPNOTSUPP;
  88         }
  89         if (rc)
  90                 QETH_DBF_TEXT_(trace, 2, "ioce%d", rc);
  91         return rc;
  92 }
  93
  94 static int qeth_l2_verify_dev(struct net_device *dev)
  95 {
  96         struct qeth_card *card;
  97         unsigned long flags;
  98         int rc = 0;
  99
 100         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
 101         list_for_each_entry(card, &qeth_core_card_list.list, list) {
 102                 if (card->dev == dev) {
 103                         rc = QETH_REAL_CARD;
 104                         break;
 105                 }
 106         }
 107         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
 108
 109         return rc;
 110 }
 111
 112 static struct net_device *qeth_l2_netdev_by_devno(unsigned char *read_dev_no)
 113 {
 114         struct qeth_card *card;
 115         struct net_device *ndev;
 116         unsigned char *readno;
 117         __u16 temp_dev_no, card_dev_no;
 118         char *endp;
 119         unsigned long flags;
 120
 121         ndev = NULL;
 122         memcpy(&temp_dev_no, read_dev_no, 2);
 123         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
 124         list_for_each_entry(card, &qeth_core_card_list.list, list) {
 125                 readno = CARD_RDEV_ID(card);
 126                 readno += (strlen(readno) - 4);
 127                 card_dev_no = simple_strtoul(readno, &endp, 16);
 128                 if (card_dev_no == temp_dev_no) {
 129                         ndev = card->dev;
 130                         break;
 131                 }
 132         }
 133         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
 134         return ndev;
 135 }
 136
 137 static int qeth_l2_send_setgroupmac_cb(struct qeth_card *card,
 138                                 struct qeth_reply *reply,
 139                                 unsigned long data)
 140 {
 141         struct qeth_ipa_cmd *cmd;
 142         __u8 *mac;
 143
 144         QETH_DBF_TEXT(trace, 2, "L2Sgmacb");
 145         cmd = (struct qeth_ipa_cmd *) data;
 146         mac = &cmd->data.setdelmac.mac[0];
 147         /* MAC already registered, needed in couple/uncouple case */
 148         if (cmd->hdr.return_code == 0x2005) {
 149                 PRINT_WARN("Group MAC %02x:%02x:%02x:%02x:%02x:%02x " \
 150                           "already existing on %s \n",
 151                           mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
 152                           QETH_CARD_IFNAME(card));
 153                 cmd->hdr.return_code = 0;
 154         }
 155         if (cmd->hdr.return_code)
 156                 PRINT_ERR("Could not set group MAC " \
 157                           "%02x:%02x:%02x:%02x:%02x:%02x on %s: %x\n",
 158                           mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
 159                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 160         return 0;
 161 }
 162
 163 static int qeth_l2_send_setgroupmac(struct qeth_card *card, __u8 *mac)
 164 {
 165         QETH_DBF_TEXT(trace, 2, "L2Sgmac");
 166         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETGMAC,
 167                                           qeth_l2_send_setgroupmac_cb);
 168 }
 169
 170 static int qeth_l2_send_delgroupmac_cb(struct qeth_card *card,
 171                                 struct qeth_reply *reply,
 172                                 unsigned long data)
 173 {
 174         struct qeth_ipa_cmd *cmd;
 175         __u8 *mac;
 176
 177         QETH_DBF_TEXT(trace, 2, "L2Dgmacb");
 178         cmd = (struct qeth_ipa_cmd *) data;
 179         mac = &cmd->data.setdelmac.mac[0];
 180         if (cmd->hdr.return_code)
 181                 PRINT_ERR("Could not delete group MAC " \
 182                           "%02x:%02x:%02x:%02x:%02x:%02x on %s: %x\n",
 183                           mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
 184                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 185         return 0;
 186 }
 187
 188 static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac)
 189 {
 190         QETH_DBF_TEXT(trace, 2, "L2Dgmac");
 191         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELGMAC,
 192                                           qeth_l2_send_delgroupmac_cb);
 193 }
 194
 195 static void qeth_l2_add_mc(struct qeth_card *card, __u8 *mac)
 196 {
 197         struct qeth_mc_mac *mc;
 198
 199         mc = kmalloc(sizeof(struct qeth_mc_mac), GFP_ATOMIC);
 200
 201         if (!mc) {
 202                 PRINT_ERR("no mem vor mc mac address\n");
 203                 return;
 204         }
 205
 206         memcpy(mc->mc_addr, mac, OSA_ADDR_LEN);
 207         mc->mc_addrlen = OSA_ADDR_LEN;
 208
 209         if (!qeth_l2_send_setgroupmac(card, mac))
 210                 list_add_tail(&mc->list, &card->mc_list);
 211         else
 212                 kfree(mc);
 213 }
 214
 215 static void qeth_l2_del_all_mc(struct qeth_card *card)
 216 {
 217         struct qeth_mc_mac *mc, *tmp;
 218
 219         spin_lock_bh(&card->mclock);
 220         list_for_each_entry_safe(mc, tmp, &card->mc_list, list) {
 221                 qeth_l2_send_delgroupmac(card, mc->mc_addr);
 222                 list_del(&mc->list);
 223                 kfree(mc);
 224         }
 225         spin_unlock_bh(&card->mclock);
 226 }
 227
 228 static void qeth_l2_get_packet_type(struct qeth_card *card,
 229                         struct qeth_hdr *hdr, struct sk_buff *skb)
 230 {
 231         __u16 hdr_mac;
 232
 233         if (!memcmp(skb->data + QETH_HEADER_SIZE,
 234                     skb->dev->broadcast, 6)) {
 235                 /* broadcast? */
 236                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 237                 return;
 238         }
 239         hdr_mac = *((__u16 *)skb->data);
 240         /* tr multicast? */
 241         switch (card->info.link_type) {
 242         case QETH_LINK_TYPE_HSTR:
 243         case QETH_LINK_TYPE_LANE_TR:
 244                 if ((hdr_mac == QETH_TR_MAC_NC) ||
 245                     (hdr_mac == QETH_TR_MAC_C))
 246                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 247                 else
 248                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 249                 break;
 250                 /* eth or so multicast? */
 251         default:
 252                 if ((hdr_mac == QETH_ETH_MAC_V4) ||
 253                      (hdr_mac == QETH_ETH_MAC_V6))
 254                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 255                 else
 256                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 257         }
 258 }
 259
 260 static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
 261                         struct sk_buff *skb, int ipv, int cast_type)
 262 {
 263         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)((skb->data) +
 264                                         QETH_HEADER_SIZE);
 265
 266         memset(hdr, 0, sizeof(struct qeth_hdr));
 267         hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
 268
 269         /* set byte byte 3 to casting flags */
 270         if (cast_type == RTN_MULTICAST)
 271                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 272         else if (cast_type == RTN_BROADCAST)
 273                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 274         else
 275                 qeth_l2_get_packet_type(card, hdr, skb);
 276
 277         hdr->hdr.l2.pkt_length = skb->len-QETH_HEADER_SIZE;
 278         /* VSWITCH relies on the VLAN
 279          * information to be present in
 280          * the QDIO header */
 281         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
 282                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
 283                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
 284         }
 285 }
 286
 287 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
 288                         struct qeth_reply *reply, unsigned long data)
 289 {
 290         struct qeth_ipa_cmd *cmd;
 291
 292         QETH_DBF_TEXT(trace, 2, "L2sdvcb");
 293         cmd = (struct qeth_ipa_cmd *) data;
 294         if (cmd->hdr.return_code) {
 295                 PRINT_ERR("Error in processing VLAN %i on %s: 0x%x. "
 296                           "Continuing\n", cmd->data.setdelvlan.vlan_id,
 297                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 298                 QETH_DBF_TEXT_(trace, 2, "L2VL%4x", cmd->hdr.command);
 299                 QETH_DBF_TEXT_(trace, 2, "L2%s", CARD_BUS_ID(card));
 300                 QETH_DBF_TEXT_(trace, 2, "err%d", cmd->hdr.return_code);
 301         }
 302         return 0;
 303 }
 304
 305 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
 306                                 enum qeth_ipa_cmds ipacmd)
 307 {
 308         struct qeth_ipa_cmd *cmd;
 309         struct qeth_cmd_buffer *iob;
 310
 311         QETH_DBF_TEXT_(trace, 4, "L2sdv%x", ipacmd);
 312         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 313         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 314         cmd->data.setdelvlan.vlan_id = i;
 315         return qeth_send_ipa_cmd(card, iob,
 316                                  qeth_l2_send_setdelvlan_cb, NULL);
 317 }
 318
 319 static void qeth_l2_process_vlans(struct qeth_card *card, int clear)
 320 {
 321         struct qeth_vlan_vid *id;
 322         QETH_DBF_TEXT(trace, 3, "L2prcvln");
 323         spin_lock_bh(&card->vlanlock);
 324         list_for_each_entry(id, &card->vid_list, list) {
 325                 if (clear)
 326                         qeth_l2_send_setdelvlan(card, id->vid,
 327                                 IPA_CMD_DELVLAN);
 328                 else
 329                         qeth_l2_send_setdelvlan(card, id->vid,
 330                                 IPA_CMD_SETVLAN);
 331         }
 332         spin_unlock_bh(&card->vlanlock);
 333 }
 334
 335 static void qeth_l2_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
 336 {
 337         struct qeth_card *card = netdev_priv(dev);
 338         struct qeth_vlan_vid *id;
 339
 340         QETH_DBF_TEXT_(trace, 4, "aid:%d", vid);
 341         id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
 342         if (id) {
 343                 id->vid = vid;
 344                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
 345                 spin_lock_bh(&card->vlanlock);
 346                 list_add_tail(&id->list, &card->vid_list);
 347                 spin_unlock_bh(&card->vlanlock);
 348         } else {
 349                 PRINT_ERR("no memory for vid\n");
 350         }
 351 }
 352
 353 static void qeth_l2_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
 354 {
 355         struct qeth_vlan_vid *id, *tmpid = NULL;
 356         struct qeth_card *card = netdev_priv(dev);
 357
 358         QETH_DBF_TEXT_(trace, 4, "kid:%d", vid);
 359         spin_lock_bh(&card->vlanlock);
 360         list_for_each_entry(id, &card->vid_list, list) {
 361                 if (id->vid == vid) {
 362                         list_del(&id->list);
 363                         tmpid = id;
 364                         break;
 365                 }
 366         }
 367         spin_unlock_bh(&card->vlanlock);
 368         if (tmpid) {
 369                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 370                 kfree(tmpid);
 371         }
 372         qeth_l2_set_multicast_list(card->dev);
 373 }
 374
 375 static int qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
 376 {
 377         int rc = 0;
 378
 379         QETH_DBF_TEXT(setup , 2, "stopcard");
 380         QETH_DBF_HEX(setup, 2, &card, sizeof(void *));
 381
 382         qeth_set_allowed_threads(card, 0, 1);
 383         if (qeth_wait_for_threads(card, ~QETH_RECOVER_THREAD))
 384                 return -ERESTARTSYS;
 385         if (card->read.state == CH_STATE_UP &&
 386             card->write.state == CH_STATE_UP &&
 387             (card->state == CARD_STATE_UP)) {
 388                 if (recovery_mode &&
 389                     card->info.type != QETH_CARD_TYPE_OSN) {
 390                         qeth_l2_stop(card->dev);
 391                 } else {
 392                         rtnl_lock();
 393                         dev_close(card->dev);
 394                         rtnl_unlock();
 395                 }
 396                 if (!card->use_hard_stop) {
 397                         __u8 *mac = &card->dev->dev_addr[0];
 398                         rc = qeth_l2_send_delmac(card, mac);
 399                         QETH_DBF_TEXT_(setup, 2, "Lerr%d", rc);
 400                 }
 401                 card->state = CARD_STATE_SOFTSETUP;
 402         }
 403         if (card->state == CARD_STATE_SOFTSETUP) {
 404                 qeth_l2_process_vlans(card, 1);
 405                 qeth_l2_del_all_mc(card);
 406                 qeth_clear_ipacmd_list(card);
 407                 card->state = CARD_STATE_HARDSETUP;
 408         }
 409         if (card->state == CARD_STATE_HARDSETUP) {
 410                 qeth_qdio_clear_card(card, 0);
 411                 qeth_clear_qdio_buffers(card);
 412                 qeth_clear_working_pool_list(card);
 413                 card->state = CARD_STATE_DOWN;
 414         }
 415         if (card->state == CARD_STATE_DOWN) {
 416                 qeth_clear_cmd_buffers(&card->read);
 417                 qeth_clear_cmd_buffers(&card->write);
 418         }
 419         card->use_hard_stop = 0;
 420         return rc;
 421 }
 422
 423 static void qeth_l2_process_inbound_buffer(struct qeth_card *card,
 424                             struct qeth_qdio_buffer *buf, int index)
 425 {
 426         struct qdio_buffer_element *element;
 427         struct sk_buff *skb;
 428         struct qeth_hdr *hdr;
 429         int offset;
 430         unsigned int len;
 431
 432         /* get first element of current buffer */
 433         element = (struct qdio_buffer_element *)&buf->buffer->element[0];
 434         offset = 0;
 435         if (card->options.performance_stats)
 436                 card->perf_stats.bufs_rec++;
 437         while ((skb = qeth_core_get_next_skb(card, buf->buffer, &element,
 438                                        &offset, &hdr))) {
 439                 skb->dev = card->dev;
 440                 /* is device UP ? */
 441                 if (!(card->dev->flags & IFF_UP)) {
 442                         dev_kfree_skb_any(skb);
 443                         continue;
 444                 }
 445
 446                 switch (hdr->hdr.l2.id) {
 447                 case QETH_HEADER_TYPE_LAYER2:
 448                         skb->pkt_type = PACKET_HOST;
 449                         skb->protocol = eth_type_trans(skb, skb->dev);
 450                         if (card->options.checksum_type == NO_CHECKSUMMING)
 451                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 452                         else
 453                                 skb->ip_summed = CHECKSUM_NONE;
 454                         *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
 455                         len = skb->len;
 456                         netif_rx(skb);
 457                         break;
 458                 case QETH_HEADER_TYPE_OSN:
 459                         skb_push(skb, sizeof(struct qeth_hdr));
 460                         skb_copy_to_linear_data(skb, hdr,
 461                                                 sizeof(struct qeth_hdr));
 462                         len = skb->len;
 463                         card->osn_info.data_cb(skb);
 464                         break;
 465                 default:
 466                         dev_kfree_skb_any(skb);
 467                         QETH_DBF_TEXT(trace, 3, "inbunkno");
 468                         QETH_DBF_HEX(control, 3, hdr, QETH_DBF_CONTROL_LEN);
 469                         continue;
 470                 }
 471                 card->dev->last_rx = jiffies;
 472                 card->stats.rx_packets++;
 473                 card->stats.rx_bytes += len;
 474         }
 475 }
 476
 477 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
 478                            enum qeth_ipa_cmds ipacmd,
 479                            int (*reply_cb) (struct qeth_card *,
 480                                             struct qeth_reply*,
 481                                             unsigned long))
 482 {
 483         struct qeth_ipa_cmd *cmd;
 484         struct qeth_cmd_buffer *iob;
 485
 486         QETH_DBF_TEXT(trace, 2, "L2sdmac");
 487         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 488         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 489         cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
 490         memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
 491         return qeth_send_ipa_cmd(card, iob, reply_cb, NULL);
 492 }
 493
 494 static int qeth_l2_send_setmac_cb(struct qeth_card *card,
 495                            struct qeth_reply *reply,
 496                            unsigned long data)
 497 {
 498         struct qeth_ipa_cmd *cmd;
 499
 500         QETH_DBF_TEXT(trace, 2, "L2Smaccb");
 501         cmd = (struct qeth_ipa_cmd *) data;
 502         if (cmd->hdr.return_code) {
 503                 QETH_DBF_TEXT_(trace, 2, "L2er%x", cmd->hdr.return_code);
 504                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 505                 cmd->hdr.return_code = -EIO;
 506         } else {
 507                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 508                 memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
 509                        OSA_ADDR_LEN);
 510                 PRINT_INFO("MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x "
 511                            "successfully registered on device %s\n",
 512                            card->dev->dev_addr[0], card->dev->dev_addr[1],
 513                            card->dev->dev_addr[2], card->dev->dev_addr[3],
 514                            card->dev->dev_addr[4], card->dev->dev_addr[5],
 515                            card->dev->name);
 516         }
 517         return 0;
 518 }
 519
 520 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
 521 {
 522         QETH_DBF_TEXT(trace, 2, "L2Setmac");
 523         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
 524                                           qeth_l2_send_setmac_cb);
 525 }
 526
 527 static int qeth_l2_send_delmac_cb(struct qeth_card *card,
 528                            struct qeth_reply *reply,
 529                            unsigned long data)
 530 {
 531         struct qeth_ipa_cmd *cmd;
 532
 533         QETH_DBF_TEXT(trace, 2, "L2Dmaccb");
 534         cmd = (struct qeth_ipa_cmd *) data;
 535         if (cmd->hdr.return_code) {
 536                 QETH_DBF_TEXT_(trace, 2, "err%d", cmd->hdr.return_code);
 537                 cmd->hdr.return_code = -EIO;
 538                 return 0;
 539         }
 540         card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 541
 542         return 0;
 543 }
 544
 545 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
 546 {
 547         QETH_DBF_TEXT(trace, 2, "L2Delmac");
 548         if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
 549                 return 0;
 550         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
 551                                           qeth_l2_send_delmac_cb);
 552 }
 553
 554 static int qeth_l2_request_initial_mac(struct qeth_card *card)
 555 {
 556         int rc = 0;
 557         char vendor_pre[] = {0x02, 0x00, 0x00};
 558
 559         QETH_DBF_TEXT(setup, 2, "doL2init");
 560         QETH_DBF_TEXT_(setup, 2, "doL2%s", CARD_BUS_ID(card));
 561
 562         rc = qeth_query_setadapterparms(card);
 563         if (rc) {
 564                 PRINT_WARN("could not query adapter parameters on device %s: "
 565                            "x%x\n", CARD_BUS_ID(card), rc);
 566         }
 567
 568         if (card->info.guestlan) {
 569                 rc = qeth_setadpparms_change_macaddr(card);
 570                 if (rc) {
 571                         PRINT_WARN("couldn't get MAC address on "
 572                            "device %s: x%x\n",
 573                            CARD_BUS_ID(card), rc);
 574                         QETH_DBF_TEXT_(setup, 2, "1err%d", rc);
 575                         return rc;
 576                 }
 577                 QETH_DBF_HEX(setup, 2, card->dev->dev_addr, OSA_ADDR_LEN);
 578         } else {
 579                 random_ether_addr(card->dev->dev_addr);
 580                 memcpy(card->dev->dev_addr, vendor_pre, 3);
 581         }
 582         return 0;
 583 }
 584
 585 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 586 {
 587         struct sockaddr *addr = p;
 588         struct qeth_card *card = netdev_priv(dev);
 589         int rc = 0;
 590
 591         QETH_DBF_TEXT(trace, 3, "setmac");
 592
 593         if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
 594                 QETH_DBF_TEXT(trace, 3, "setmcINV");
 595                 return -EOPNOTSUPP;
 596         }
 597
 598         if (card->info.type == QETH_CARD_TYPE_OSN) {
 599                 PRINT_WARN("Setting MAC address on %s is not supported.\n",
 600                            dev->name);
 601                 QETH_DBF_TEXT(trace, 3, "setmcOSN");
 602                 return -EOPNOTSUPP;
 603         }
 604         QETH_DBF_TEXT_(trace, 3, "%s", CARD_BUS_ID(card));
 605         QETH_DBF_HEX(trace, 3, addr->sa_data, OSA_ADDR_LEN);
 606         rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
 607         if (!rc)
 608                 rc = qeth_l2_send_setmac(card, addr->sa_data);
 609         return rc;
 610 }
 611
 612 static void qeth_l2_set_multicast_list(struct net_device *dev)
 613 {
 614         struct qeth_card *card = netdev_priv(dev);
 615         struct dev_mc_list *dm;
 616
 617         if (card->info.type == QETH_CARD_TYPE_OSN)
 618                 return ;
 619
 620         QETH_DBF_TEXT(trace, 3, "setmulti");
 621         qeth_l2_del_all_mc(card);
 622         spin_lock_bh(&card->mclock);
 623         for (dm = dev->mc_list; dm; dm = dm->next)
 624                 qeth_l2_add_mc(card, dm->dmi_addr);
 625         spin_unlock_bh(&card->mclock);
 626         if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
 627                 return;
 628         qeth_setadp_promisc_mode(card);
 629 }
 630
 631 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 632 {
 633         int rc;
 634         struct qeth_hdr *hdr = NULL;
 635         int elements = 0;
 636         struct qeth_card *card = netdev_priv(dev);
 637         struct sk_buff *new_skb = skb;
 638         int ipv = qeth_get_ip_version(skb);
 639         int cast_type = qeth_get_cast_type(card, skb);
 640         struct qeth_qdio_out_q *queue = card->qdio.out_qs
 641                 [qeth_get_priority_queue(card, skb, ipv, cast_type)];
 642         int tx_bytes = skb->len;
 643         enum qeth_large_send_types large_send = QETH_LARGE_SEND_NO;
 644         struct qeth_eddp_context *ctx = NULL;
 645
 646         QETH_DBF_TEXT(trace, 6, "l2xmit");
 647
 648         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
 649                 card->stats.tx_carrier_errors++;
 650                 goto tx_drop;
 651         }
 652
 653         if ((card->info.type == QETH_CARD_TYPE_OSN) &&
 654             (skb->protocol == htons(ETH_P_IPV6)))
 655                 goto tx_drop;
 656
 657         if (card->options.performance_stats) {
 658                 card->perf_stats.outbound_cnt++;
 659                 card->perf_stats.outbound_start_time = qeth_get_micros();
 660         }
 661         netif_stop_queue(dev);
 662
 663         if (skb_is_gso(skb))
 664                 large_send = QETH_LARGE_SEND_EDDP;
 665
 666         if (card->info.type == QETH_CARD_TYPE_OSN)
 667                 hdr = (struct qeth_hdr *)skb->data;
 668         else {
 669                 new_skb = qeth_prepare_skb(card, skb, &hdr);
 670                 if (!new_skb)
 671                         goto tx_drop;
 672                 qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 673         }
 674
 675         if (large_send == QETH_LARGE_SEND_EDDP) {
 676                 ctx = qeth_eddp_create_context(card, new_skb, hdr,
 677                                                 skb->sk->sk_protocol);
 678                 if (ctx == NULL) {
 679                         PRINT_WARN("could not create eddp context\n");
 680                         goto tx_drop;
 681                 }
 682         } else {
 683                 elements = qeth_get_elements_no(card, (void *)hdr, new_skb, 0);
 684                 if (!elements)
 685                         goto tx_drop;
 686         }
 687
 688         if ((large_send == QETH_LARGE_SEND_NO) &&
 689             (skb->ip_summed == CHECKSUM_PARTIAL))
 690                 qeth_tx_csum(new_skb);
 691
 692         if (card->info.type != QETH_CARD_TYPE_IQD)
 693                 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
 694                                          elements, ctx);
 695         else
 696                 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
 697                                               elements, ctx);
 698         if (!rc) {
 699                 card->stats.tx_packets++;
 700                 card->stats.tx_bytes += tx_bytes;
 701                 if (new_skb != skb)
 702                         dev_kfree_skb_any(skb);
 703                 if (card->options.performance_stats) {
 704                         if (large_send != QETH_LARGE_SEND_NO) {
 705                                 card->perf_stats.large_send_bytes += tx_bytes;
 706                                 card->perf_stats.large_send_cnt++;
 707                         }
 708                         if (skb_shinfo(new_skb)->nr_frags > 0) {
 709                                 card->perf_stats.sg_skbs_sent++;
 710                                 /* nr_frags + skb->data */
 711                                 card->perf_stats.sg_frags_sent +=
 712                                         skb_shinfo(new_skb)->nr_frags + 1;
 713                         }
 714                 }
 715
 716                 if (ctx != NULL) {
 717                         qeth_eddp_put_context(ctx);
 718                         dev_kfree_skb_any(new_skb);
 719                 }
 720         } else {
 721                 if (ctx != NULL)
 722                         qeth_eddp_put_context(ctx);
 723
 724                 if (rc == -EBUSY) {
 725                         if (new_skb != skb)
 726                                 dev_kfree_skb_any(new_skb);
 727                         return NETDEV_TX_BUSY;
 728                 } else
 729                         goto tx_drop;
 730         }
 731
 732         netif_wake_queue(dev);
 733         if (card->options.performance_stats)
 734                 card->perf_stats.outbound_time += qeth_get_micros() -
 735                         card->perf_stats.outbound_start_time;
 736         return rc;
 737
 738 tx_drop:
 739         card->stats.tx_dropped++;
 740         card->stats.tx_errors++;
 741         if ((new_skb != skb) && new_skb)
 742                 dev_kfree_skb_any(new_skb);
 743         dev_kfree_skb_any(skb);
 744         return NETDEV_TX_OK;
 745 }
 746
 747 static void qeth_l2_qdio_input_handler(struct ccw_device *ccwdev,
 748                         unsigned int status, unsigned int qdio_err,
 749                         unsigned int siga_err, unsigned int queue,
 750                         int first_element, int count, unsigned long card_ptr)
 751 {
 752         struct net_device *net_dev;
 753         struct qeth_card *card;
 754         struct qeth_qdio_buffer *buffer;
 755         int index;
 756         int i;
 757
 758         QETH_DBF_TEXT(trace, 6, "qdinput");
 759         card = (struct qeth_card *) card_ptr;
 760         net_dev = card->dev;
 761         if (card->options.performance_stats) {
 762                 card->perf_stats.inbound_cnt++;
 763                 card->perf_stats.inbound_start_time = qeth_get_micros();
 764         }
 765         if (status & QDIO_STATUS_LOOK_FOR_ERROR) {
 766                 if (status & QDIO_STATUS_ACTIVATE_CHECK_CONDITION) {
 767                         QETH_DBF_TEXT(trace, 1, "qdinchk");
 768                         QETH_DBF_TEXT_(trace, 1, "%s", CARD_BUS_ID(card));
 769                         QETH_DBF_TEXT_(trace, 1, "%04X%04X", first_element,
 770                                         count);
 771                         QETH_DBF_TEXT_(trace, 1, "%04X%04X", queue, status);
 772                         qeth_schedule_recovery(card);
 773                         return;
 774                 }
 775         }
 776         for (i = first_element; i < (first_element + count); ++i) {
 777                 index = i % QDIO_MAX_BUFFERS_PER_Q;
 778                 buffer = &card->qdio.in_q->bufs[index];
 779                 if (!((status & QDIO_STATUS_LOOK_FOR_ERROR) &&
 780                       qeth_check_qdio_errors(buffer->buffer,
 781                                              qdio_err, siga_err, "qinerr")))
 782                         qeth_l2_process_inbound_buffer(card, buffer, index);
 783                 /* clear buffer and give back to hardware */
 784                 qeth_put_buffer_pool_entry(card, buffer->pool_entry);
 785                 qeth_queue_input_buffer(card, index);
 786         }
 787         if (card->options.performance_stats)
 788                 card->perf_stats.inbound_time += qeth_get_micros() -
 789                         card->perf_stats.inbound_start_time;
 790 }
 791
 792 static int qeth_l2_open(struct net_device *dev)
 793 {
 794         struct qeth_card *card = netdev_priv(dev);
 795
 796         QETH_DBF_TEXT(trace, 4, "qethopen");
 797         if (card->state != CARD_STATE_SOFTSETUP)
 798                 return -ENODEV;
 799
 800         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
 801              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
 802                 QETH_DBF_TEXT(trace, 4, "nomacadr");
 803                 return -EPERM;
 804         }
 805         card->data.state = CH_STATE_UP;
 806         card->state = CARD_STATE_UP;
 807         card->dev->flags |= IFF_UP;
 808         netif_start_queue(dev);
 809
 810         if (!card->lan_online && netif_carrier_ok(dev))
 811                 netif_carrier_off(dev);
 812         return 0;
 813 }
 814
 815
 816 static int qeth_l2_stop(struct net_device *dev)
 817 {
 818         struct qeth_card *card = netdev_priv(dev);
 819
 820         QETH_DBF_TEXT(trace, 4, "qethstop");
 821         netif_tx_disable(dev);
 822         card->dev->flags &= ~IFF_UP;
 823         if (card->state == CARD_STATE_UP)
 824                 card->state = CARD_STATE_SOFTSETUP;
 825         return 0;
 826 }
 827
 828 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 829 {
 830         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 831
 832         INIT_LIST_HEAD(&card->vid_list);
 833         INIT_LIST_HEAD(&card->mc_list);
 834         card->options.layer2 = 1;
 835         card->discipline.input_handler = (qdio_handler_t *)
 836                 qeth_l2_qdio_input_handler;
 837         card->discipline.output_handler = (qdio_handler_t *)
 838                 qeth_qdio_output_handler;
 839         card->discipline.recover = qeth_l2_recover;
 840         return 0;
 841 }
 842
 843 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
 844 {
 845         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
 846
 847         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 848
 849         if (cgdev->state == CCWGROUP_ONLINE) {
 850                 card->use_hard_stop = 1;
 851                 qeth_l2_set_offline(cgdev);
 852         }
 853
 854         if (card->dev) {
 855                 unregister_netdev(card->dev);
 856                 card->dev = NULL;
 857         }
 858
 859         qeth_l2_del_all_mc(card);
 860         return;
 861 }
 862
 863 static struct ethtool_ops qeth_l2_ethtool_ops = {
 864         .get_link = ethtool_op_get_link,
 865         .get_tx_csum = ethtool_op_get_tx_csum,
 866         .set_tx_csum = ethtool_op_set_tx_hw_csum,
 867         .get_sg = ethtool_op_get_sg,
 868         .set_sg = ethtool_op_set_sg,
 869         .get_tso = ethtool_op_get_tso,
 870         .set_tso = ethtool_op_set_tso,
 871         .get_strings = qeth_core_get_strings,
 872         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 873         .get_stats_count = qeth_core_get_stats_count,
 874         .get_drvinfo = qeth_core_get_drvinfo,
 875 };
 876
 877 static struct ethtool_ops qeth_l2_osn_ops = {
 878         .get_strings = qeth_core_get_strings,
 879         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 880         .get_stats_count = qeth_core_get_stats_count,
 881         .get_drvinfo = qeth_core_get_drvinfo,
 882 };
 883
 884 static int qeth_l2_setup_netdev(struct qeth_card *card)
 885 {
 886         switch (card->info.type) {
 887         case QETH_CARD_TYPE_OSAE:
 888                 card->dev = alloc_etherdev(0);
 889                 break;
 890         case QETH_CARD_TYPE_IQD:
 891                 card->dev = alloc_netdev(0, "hsi%d", ether_setup);
 892                 break;
 893         case QETH_CARD_TYPE_OSN:
 894                 card->dev = alloc_netdev(0, "osn%d", ether_setup);
 895                 card->dev->flags |= IFF_NOARP;
 896                 break;
 897         default:
 898                 card->dev = alloc_etherdev(0);
 899         }
 900
 901         if (!card->dev)
 902                 return -ENODEV;
 903
 904         card->dev->priv = card;
 905         card->dev->tx_timeout = &qeth_tx_timeout;
 906         card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
 907         card->dev->open = qeth_l2_open;
 908         card->dev->stop = qeth_l2_stop;
 909         card->dev->hard_start_xmit = qeth_l2_hard_start_xmit;
 910         card->dev->do_ioctl = qeth_l2_do_ioctl;
 911         card->dev->get_stats = qeth_get_stats;
 912         card->dev->change_mtu = qeth_change_mtu;
 913         card->dev->set_multicast_list = qeth_l2_set_multicast_list;
 914         card->dev->vlan_rx_kill_vid = qeth_l2_vlan_rx_kill_vid;
 915         card->dev->vlan_rx_add_vid = qeth_l2_vlan_rx_add_vid;
 916         card->dev->set_mac_address = qeth_l2_set_mac_address;
 917         card->dev->mtu = card->info.initial_mtu;
 918         if (card->info.type != QETH_CARD_TYPE_OSN)
 919                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops);
 920         else
 921                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops);
 922         card->dev->features |= NETIF_F_HW_VLAN_FILTER;
 923         card->info.broadcast_capable = 1;
 924         qeth_l2_request_initial_mac(card);
 925         SET_NETDEV_DEV(card->dev, &card->gdev->dev);
 926         return register_netdev(card->dev);
 927 }
 928
 929 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 930 {
 931         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 932         int rc = 0;
 933         enum qeth_card_states recover_flag;
 934
 935         BUG_ON(!card);
 936         QETH_DBF_TEXT(setup, 2, "setonlin");
 937         QETH_DBF_HEX(setup, 2, &card, sizeof(void *));
 938
 939         qeth_set_allowed_threads(card, QETH_RECOVER_THREAD, 1);
 940         if (qeth_wait_for_threads(card, ~QETH_RECOVER_THREAD)) {
 941                 PRINT_WARN("set_online of card %s interrupted by user!\n",
 942                            CARD_BUS_ID(card));
 943                 return -ERESTARTSYS;
 944         }
 945
 946         recover_flag = card->state;
 947         rc = ccw_device_set_online(CARD_RDEV(card));
 948         if (rc) {
 949                 QETH_DBF_TEXT_(setup, 2, "1err%d", rc);
 950                 return -EIO;
 951         }
 952         rc = ccw_device_set_online(CARD_WDEV(card));
 953         if (rc) {
 954                 QETH_DBF_TEXT_(setup, 2, "1err%d", rc);
 955                 return -EIO;
 956         }
 957         rc = ccw_device_set_online(CARD_DDEV(card));
 958         if (rc) {
 959                 QETH_DBF_TEXT_(setup, 2, "1err%d", rc);
 960                 return -EIO;
 961         }
 962
 963         rc = qeth_core_hardsetup_card(card);
 964         if (rc) {
 965                 QETH_DBF_TEXT_(setup, 2, "2err%d", rc);
 966                 goto out_remove;
 967         }
 968
 969         if (!card->dev && qeth_l2_setup_netdev(card))
 970                 goto out_remove;
 971
 972         if (card->info.type != QETH_CARD_TYPE_OSN)
 973                 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
 974
 975         card->state = CARD_STATE_HARDSETUP;
 976         qeth_print_status_message(card);
 977
 978         /* softsetup */
 979         QETH_DBF_TEXT(setup, 2, "softsetp");
 980
 981         rc = qeth_send_startlan(card);
 982         if (rc) {
 983                 QETH_DBF_TEXT_(setup, 2, "1err%d", rc);
 984                 if (rc == 0xe080) {
 985                         PRINT_WARN("LAN on card %s if offline! "
 986                                    "Waiting for STARTLAN from card.\n",
 987                                    CARD_BUS_ID(card));
 988                         card->lan_online = 0;
 989                 }
 990                 return rc;
 991         } else
 992                 card->lan_online = 1;
 993
 994         if (card->info.type != QETH_CARD_TYPE_OSN) {
 995                 qeth_set_large_send(card, card->options.large_send);
 996                 qeth_l2_process_vlans(card, 0);
 997         }
 998
 999         netif_tx_disable(card->dev);
1000
1001         rc = qeth_init_qdio_queues(card);
1002         if (rc) {
1003                 QETH_DBF_TEXT_(setup, 2, "6err%d", rc);
1004                 goto out_remove;
1005         }
1006         card->state = CARD_STATE_SOFTSETUP;
1007         netif_carrier_on(card->dev);
1008
1009         qeth_set_allowed_threads(card, 0xffffffff, 0);
1010         if (recover_flag == CARD_STATE_RECOVER) {
1011                 if (recovery_mode &&
1012                     card->info.type != QETH_CARD_TYPE_OSN) {
1013                         qeth_l2_open(card->dev);
1014                 } else {
1015                         rtnl_lock();
1016                         dev_open(card->dev);
1017                         rtnl_unlock();
1018                 }
1019                 /* this also sets saved unicast addresses */
1020                 qeth_l2_set_multicast_list(card->dev);
1021         }
1022         /* let user_space know that device is online */
1023         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1024         return 0;
1025 out_remove:
1026         card->use_hard_stop = 1;
1027         qeth_l2_stop_card(card, 0);
1028         ccw_device_set_offline(CARD_DDEV(card));
1029         ccw_device_set_offline(CARD_WDEV(card));
1030         ccw_device_set_offline(CARD_RDEV(card));
1031         if (recover_flag == CARD_STATE_RECOVER)
1032                 card->state = CARD_STATE_RECOVER;
1033         else
1034                 card->state = CARD_STATE_DOWN;
1035         return -ENODEV;
1036 }
1037
1038 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1039 {
1040         return __qeth_l2_set_online(gdev, 0);
1041 }
1042
1043 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1044                                         int recovery_mode)
1045 {
1046         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1047         int rc = 0, rc2 = 0, rc3 = 0;
1048         enum qeth_card_states recover_flag;
1049
1050         QETH_DBF_TEXT(setup, 3, "setoffl");
1051         QETH_DBF_HEX(setup, 3, &card, sizeof(void *));
1052
1053         if (card->dev && netif_carrier_ok(card->dev))
1054                 netif_carrier_off(card->dev);
1055         recover_flag = card->state;
1056         if (qeth_l2_stop_card(card, recovery_mode) == -ERESTARTSYS) {
1057                 PRINT_WARN("Stopping card %s interrupted by user!\n",
1058                            CARD_BUS_ID(card));
1059                 return -ERESTARTSYS;
1060         }
1061         rc  = ccw_device_set_offline(CARD_DDEV(card));
1062         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1063         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1064         if (!rc)
1065                 rc = (rc2) ? rc2 : rc3;
1066         if (rc)
1067                 QETH_DBF_TEXT_(setup, 2, "1err%d", rc);
1068         if (recover_flag == CARD_STATE_UP)
1069                 card->state = CARD_STATE_RECOVER;
1070         /* let user_space know that device is offline */
1071         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1072         return 0;
1073 }
1074
1075 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1076 {
1077         return __qeth_l2_set_offline(cgdev, 0);
1078 }
1079
1080 static int qeth_l2_recover(void *ptr)
1081 {
1082         struct qeth_card *card;
1083         int rc = 0;
1084
1085         card = (struct qeth_card *) ptr;
1086         QETH_DBF_TEXT(trace, 2, "recover1");
1087         QETH_DBF_HEX(trace, 2, &card, sizeof(void *));
1088         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1089                 return 0;
1090         QETH_DBF_TEXT(trace, 2, "recover2");
1091         PRINT_WARN("Recovery of device %s started ...\n",
1092                    CARD_BUS_ID(card));
1093         card->use_hard_stop = 1;
1094         __qeth_l2_set_offline(card->gdev, 1);
1095         rc = __qeth_l2_set_online(card->gdev, 1);
1096         /* don't run another scheduled recovery */
1097         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1098         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1099         if (!rc)
1100                 PRINT_INFO("Device %s successfully recovered!\n",
1101                            CARD_BUS_ID(card));
1102         else
1103                 PRINT_INFO("Device %s could not be recovered!\n",
1104                            CARD_BUS_ID(card));
1105         return 0;
1106 }
1107
1108 static int __init qeth_l2_init(void)
1109 {
1110         PRINT_INFO("register layer 2 discipline\n");
1111         return 0;
1112 }
1113
1114 static void __exit qeth_l2_exit(void)
1115 {
1116         PRINT_INFO("unregister layer 2 discipline\n");
1117 }
1118
1119 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1120 {
1121         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1122         qeth_qdio_clear_card(card, 0);
1123         qeth_clear_qdio_buffers(card);
1124 }
1125
1126 struct ccwgroup_driver qeth_l2_ccwgroup_driver = {
1127         .probe = qeth_l2_probe_device,
1128         .remove = qeth_l2_remove_device,
1129         .set_online = qeth_l2_set_online,
1130         .set_offline = qeth_l2_set_offline,
1131         .shutdown = qeth_l2_shutdown,
1132 };
1133 EXPORT_SYMBOL_GPL(qeth_l2_ccwgroup_driver);
1134
1135 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1136                            struct qeth_cmd_buffer *iob)
1137 {
1138         unsigned long flags;
1139         int rc = 0;
1140
1141         QETH_DBF_TEXT(trace, 5, "osndctrd");
1142
1143         wait_event(card->wait_q,
1144                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1145         qeth_prepare_control_data(card, len, iob);
1146         QETH_DBF_TEXT(trace, 6, "osnoirqp");
1147         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1148         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1149                               (addr_t) iob, 0, 0);
1150         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1151         if (rc) {
1152                 PRINT_WARN("qeth_osn_send_control_data: "
1153                            "ccw_device_start rc = %i\n", rc);
1154                 QETH_DBF_TEXT_(trace, 2, " err%d", rc);
1155                 qeth_release_buffer(iob->channel, iob);
1156                 atomic_set(&card->write.irq_pending, 0);
1157                 wake_up(&card->wait_q);
1158         }
1159         return rc;
1160 }
1161
1162 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1163                         struct qeth_cmd_buffer *iob, int data_len)
1164 {
1165         u16 s1, s2;
1166
1167         QETH_DBF_TEXT(trace, 4, "osndipa");
1168
1169         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1170         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1171         s2 = (u16)data_len;
1172         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1173         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1174         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1175         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1176         return qeth_osn_send_control_data(card, s1, iob);
1177 }
1178
1179 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1180 {
1181         struct qeth_cmd_buffer *iob;
1182         struct qeth_card *card;
1183         int rc;
1184
1185         QETH_DBF_TEXT(trace, 2, "osnsdmc");
1186         if (!dev)
1187                 return -ENODEV;
1188         card = netdev_priv(dev);
1189         if (!card)
1190                 return -ENODEV;
1191         if ((card->state != CARD_STATE_UP) &&
1192             (card->state != CARD_STATE_SOFTSETUP))
1193                 return -ENODEV;
1194         iob = qeth_wait_for_buffer(&card->write);
1195         memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1196         rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1197         return rc;
1198 }
1199 EXPORT_SYMBOL(qeth_osn_assist);
1200
1201 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1202                   int (*assist_cb)(struct net_device *, void *),
1203                   int (*data_cb)(struct sk_buff *))
1204 {
1205         struct qeth_card *card;
1206
1207         QETH_DBF_TEXT(trace, 2, "osnreg");
1208         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1209         if (*dev == NULL)
1210                 return -ENODEV;
1211         card = netdev_priv(*dev);
1212         if (!card)
1213                 return -ENODEV;
1214         if ((assist_cb == NULL) || (data_cb == NULL))
1215                 return -EINVAL;
1216         card->osn_info.assist_cb = assist_cb;
1217         card->osn_info.data_cb = data_cb;
1218         return 0;
1219 }
1220 EXPORT_SYMBOL(qeth_osn_register);
1221
1222 void qeth_osn_deregister(struct net_device *dev)
1223 {
1224         struct qeth_card *card;
1225
1226         QETH_DBF_TEXT(trace, 2, "osndereg");
1227         if (!dev)
1228                 return;
1229         card = netdev_priv(dev);
1230         if (!card)
1231                 return;
1232         card->osn_info.assist_cb = NULL;
1233         card->osn_info.data_cb = NULL;
1234         return;
1235 }
1236 EXPORT_SYMBOL(qeth_osn_deregister);
1237
1238 module_init(qeth_l2_init);
1239 module_exit(qeth_l2_exit);
1240 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1241 MODULE_DESCRIPTION("qeth layer 2 discipline");
1242 MODULE_LICENSE("GPL");