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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                         if (skb->protocol == htons(ETH_P_802_2))
 455                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
 456                         len = skb->len;
 457                         netif_rx(skb);
 458                         break;
 459                 case QETH_HEADER_TYPE_OSN:
 460                         skb_push(skb, sizeof(struct qeth_hdr));
 461                         skb_copy_to_linear_data(skb, hdr,
 462                                                 sizeof(struct qeth_hdr));
 463                         len = skb->len;
 464                         card->osn_info.data_cb(skb);
 465                         break;
 466                 default:
 467                         dev_kfree_skb_any(skb);
 468                         QETH_DBF_TEXT(trace, 3, "inbunkno");
 469                         QETH_DBF_HEX(control, 3, hdr, QETH_DBF_CONTROL_LEN);
 470                         continue;
 471                 }
 472                 card->dev->last_rx = jiffies;
 473                 card->stats.rx_packets++;
 474                 card->stats.rx_bytes += len;
 475         }
 476 }
 477
 478 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
 479                            enum qeth_ipa_cmds ipacmd,
 480                            int (*reply_cb) (struct qeth_card *,
 481                                             struct qeth_reply*,
 482                                             unsigned long))
 483 {
 484         struct qeth_ipa_cmd *cmd;
 485         struct qeth_cmd_buffer *iob;
 486
 487         QETH_DBF_TEXT(trace, 2, "L2sdmac");
 488         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 489         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 490         cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
 491         memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
 492         return qeth_send_ipa_cmd(card, iob, reply_cb, NULL);
 493 }
 494
 495 static int qeth_l2_send_setmac_cb(struct qeth_card *card,
 496                            struct qeth_reply *reply,
 497                            unsigned long data)
 498 {
 499         struct qeth_ipa_cmd *cmd;
 500
 501         QETH_DBF_TEXT(trace, 2, "L2Smaccb");
 502         cmd = (struct qeth_ipa_cmd *) data;
 503         if (cmd->hdr.return_code) {
 504                 QETH_DBF_TEXT_(trace, 2, "L2er%x", cmd->hdr.return_code);
 505                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 506                 cmd->hdr.return_code = -EIO;
 507         } else {
 508                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 509                 memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
 510                        OSA_ADDR_LEN);
 511                 PRINT_INFO("MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x "
 512                            "successfully registered on device %s\n",
 513                            card->dev->dev_addr[0], card->dev->dev_addr[1],
 514                            card->dev->dev_addr[2], card->dev->dev_addr[3],
 515                            card->dev->dev_addr[4], card->dev->dev_addr[5],
 516                            card->dev->name);
 517         }
 518         return 0;
 519 }
 520
 521 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
 522 {
 523         QETH_DBF_TEXT(trace, 2, "L2Setmac");
 524         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
 525                                           qeth_l2_send_setmac_cb);
 526 }
 527
 528 static int qeth_l2_send_delmac_cb(struct qeth_card *card,
 529                            struct qeth_reply *reply,
 530                            unsigned long data)
 531 {
 532         struct qeth_ipa_cmd *cmd;
 533
 534         QETH_DBF_TEXT(trace, 2, "L2Dmaccb");
 535         cmd = (struct qeth_ipa_cmd *) data;
 536         if (cmd->hdr.return_code) {
 537                 QETH_DBF_TEXT_(trace, 2, "err%d", cmd->hdr.return_code);
 538                 cmd->hdr.return_code = -EIO;
 539                 return 0;
 540         }
 541         card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 542
 543         return 0;
 544 }
 545
 546 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
 547 {
 548         QETH_DBF_TEXT(trace, 2, "L2Delmac");
 549         if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
 550                 return 0;
 551         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
 552                                           qeth_l2_send_delmac_cb);
 553 }
 554
 555 static int qeth_l2_request_initial_mac(struct qeth_card *card)
 556 {
 557         int rc = 0;
 558         char vendor_pre[] = {0x02, 0x00, 0x00};
 559
 560         QETH_DBF_TEXT(setup, 2, "doL2init");
 561         QETH_DBF_TEXT_(setup, 2, "doL2%s", CARD_BUS_ID(card));
 562
 563         rc = qeth_query_setadapterparms(card);
 564         if (rc) {
 565                 PRINT_WARN("could not query adapter parameters on device %s: "
 566                            "x%x\n", CARD_BUS_ID(card), rc);
 567         }
 568
 569         if (card->info.guestlan) {
 570                 rc = qeth_setadpparms_change_macaddr(card);
 571                 if (rc) {
 572                         PRINT_WARN("couldn't get MAC address on "
 573                            "device %s: x%x\n",
 574                            CARD_BUS_ID(card), rc);
 575                         QETH_DBF_TEXT_(setup, 2, "1err%d", rc);
 576                         return rc;
 577                 }
 578                 QETH_DBF_HEX(setup, 2, card->dev->dev_addr, OSA_ADDR_LEN);
 579         } else {
 580                 random_ether_addr(card->dev->dev_addr);
 581                 memcpy(card->dev->dev_addr, vendor_pre, 3);
 582         }
 583         return 0;
 584 }
 585
 586 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 587 {
 588         struct sockaddr *addr = p;
 589         struct qeth_card *card = netdev_priv(dev);
 590         int rc = 0;
 591
 592         QETH_DBF_TEXT(trace, 3, "setmac");
 593
 594         if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
 595                 QETH_DBF_TEXT(trace, 3, "setmcINV");
 596                 return -EOPNOTSUPP;
 597         }
 598
 599         if (card->info.type == QETH_CARD_TYPE_OSN) {
 600                 PRINT_WARN("Setting MAC address on %s is not supported.\n",
 601                            dev->name);
 602                 QETH_DBF_TEXT(trace, 3, "setmcOSN");
 603                 return -EOPNOTSUPP;
 604         }
 605         QETH_DBF_TEXT_(trace, 3, "%s", CARD_BUS_ID(card));
 606         QETH_DBF_HEX(trace, 3, addr->sa_data, OSA_ADDR_LEN);
 607         rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
 608         if (!rc)
 609                 rc = qeth_l2_send_setmac(card, addr->sa_data);
 610         return rc;
 611 }
 612
 613 static void qeth_l2_set_multicast_list(struct net_device *dev)
 614 {
 615         struct qeth_card *card = netdev_priv(dev);
 616         struct dev_mc_list *dm;
 617
 618         if (card->info.type == QETH_CARD_TYPE_OSN)
 619                 return ;
 620
 621         QETH_DBF_TEXT(trace, 3, "setmulti");
 622         qeth_l2_del_all_mc(card);
 623         spin_lock_bh(&card->mclock);
 624         for (dm = dev->mc_list; dm; dm = dm->next)
 625                 qeth_l2_add_mc(card, dm->dmi_addr);
 626         spin_unlock_bh(&card->mclock);
 627         if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
 628                 return;
 629         qeth_setadp_promisc_mode(card);
 630 }
 631
 632 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 633 {
 634         int rc;
 635         struct qeth_hdr *hdr = NULL;
 636         int elements = 0;
 637         struct qeth_card *card = netdev_priv(dev);
 638         struct sk_buff *new_skb = skb;
 639         int ipv = qeth_get_ip_version(skb);
 640         int cast_type = qeth_get_cast_type(card, skb);
 641         struct qeth_qdio_out_q *queue = card->qdio.out_qs
 642                 [qeth_get_priority_queue(card, skb, ipv, cast_type)];
 643         int tx_bytes = skb->len;
 644         enum qeth_large_send_types large_send = QETH_LARGE_SEND_NO;
 645         struct qeth_eddp_context *ctx = NULL;
 646
 647         QETH_DBF_TEXT(trace, 6, "l2xmit");
 648
 649         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
 650                 card->stats.tx_carrier_errors++;
 651                 goto tx_drop;
 652         }
 653
 654         if ((card->info.type == QETH_CARD_TYPE_OSN) &&
 655             (skb->protocol == htons(ETH_P_IPV6)))
 656                 goto tx_drop;
 657
 658         if (card->options.performance_stats) {
 659                 card->perf_stats.outbound_cnt++;
 660                 card->perf_stats.outbound_start_time = qeth_get_micros();
 661         }
 662         netif_stop_queue(dev);
 663
 664         if (skb_is_gso(skb))
 665                 large_send = QETH_LARGE_SEND_EDDP;
 666
 667         if (card->info.type == QETH_CARD_TYPE_OSN)
 668                 hdr = (struct qeth_hdr *)skb->data;
 669         else {
 670                 new_skb = qeth_prepare_skb(card, skb, &hdr);
 671                 if (!new_skb)
 672                         goto tx_drop;
 673                 qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 674         }
 675
 676         if (large_send == QETH_LARGE_SEND_EDDP) {
 677                 ctx = qeth_eddp_create_context(card, new_skb, hdr,
 678                                                 skb->sk->sk_protocol);
 679                 if (ctx == NULL) {
 680                         PRINT_WARN("could not create eddp context\n");
 681                         goto tx_drop;
 682                 }
 683         } else {
 684                 elements = qeth_get_elements_no(card, (void *)hdr, new_skb, 0);
 685                 if (!elements)
 686                         goto tx_drop;
 687         }
 688
 689         if ((large_send == QETH_LARGE_SEND_NO) &&
 690             (skb->ip_summed == CHECKSUM_PARTIAL))
 691                 qeth_tx_csum(new_skb);
 692
 693         if (card->info.type != QETH_CARD_TYPE_IQD)
 694                 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
 695                                          elements, ctx);
 696         else
 697                 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
 698                                               elements, ctx);
 699         if (!rc) {
 700                 card->stats.tx_packets++;
 701                 card->stats.tx_bytes += tx_bytes;
 702                 if (new_skb != skb)
 703                         dev_kfree_skb_any(skb);
 704                 if (card->options.performance_stats) {
 705                         if (large_send != QETH_LARGE_SEND_NO) {
 706                                 card->perf_stats.large_send_bytes += tx_bytes;
 707                                 card->perf_stats.large_send_cnt++;
 708                         }
 709                         if (skb_shinfo(new_skb)->nr_frags > 0) {
 710                                 card->perf_stats.sg_skbs_sent++;
 711                                 /* nr_frags + skb->data */
 712                                 card->perf_stats.sg_frags_sent +=
 713                                         skb_shinfo(new_skb)->nr_frags + 1;
 714                         }
 715                 }
 716
 717                 if (ctx != NULL) {
 718                         qeth_eddp_put_context(ctx);
 719                         dev_kfree_skb_any(new_skb);
 720                 }
 721         } else {
 722                 if (ctx != NULL)
 723                         qeth_eddp_put_context(ctx);
 724
 725                 if (rc == -EBUSY) {
 726                         if (new_skb != skb)
 727                                 dev_kfree_skb_any(new_skb);
 728                         return NETDEV_TX_BUSY;
 729                 } else
 730                         goto tx_drop;
 731         }
 732
 733         netif_wake_queue(dev);
 734         if (card->options.performance_stats)
 735                 card->perf_stats.outbound_time += qeth_get_micros() -
 736                         card->perf_stats.outbound_start_time;
 737         return rc;
 738
 739 tx_drop:
 740         card->stats.tx_dropped++;
 741         card->stats.tx_errors++;
 742         if ((new_skb != skb) && new_skb)
 743                 dev_kfree_skb_any(new_skb);
 744         dev_kfree_skb_any(skb);
 745         return NETDEV_TX_OK;
 746 }
 747
 748 static void qeth_l2_qdio_input_handler(struct ccw_device *ccwdev,
 749                         unsigned int status, unsigned int qdio_err,
 750                         unsigned int siga_err, unsigned int queue,
 751                         int first_element, int count, unsigned long card_ptr)
 752 {
 753         struct net_device *net_dev;
 754         struct qeth_card *card;
 755         struct qeth_qdio_buffer *buffer;
 756         int index;
 757         int i;
 758
 759         QETH_DBF_TEXT(trace, 6, "qdinput");
 760         card = (struct qeth_card *) card_ptr;
 761         net_dev = card->dev;
 762         if (card->options.performance_stats) {
 763                 card->perf_stats.inbound_cnt++;
 764                 card->perf_stats.inbound_start_time = qeth_get_micros();
 765         }
 766         if (status & QDIO_STATUS_LOOK_FOR_ERROR) {
 767                 if (status & QDIO_STATUS_ACTIVATE_CHECK_CONDITION) {
 768                         QETH_DBF_TEXT(trace, 1, "qdinchk");
 769                         QETH_DBF_TEXT_(trace, 1, "%s", CARD_BUS_ID(card));
 770                         QETH_DBF_TEXT_(trace, 1, "%04X%04X", first_element,
 771                                         count);
 772                         QETH_DBF_TEXT_(trace, 1, "%04X%04X", queue, status);
 773                         qeth_schedule_recovery(card);
 774                         return;
 775                 }
 776         }
 777         for (i = first_element; i < (first_element + count); ++i) {
 778                 index = i % QDIO_MAX_BUFFERS_PER_Q;
 779                 buffer = &card->qdio.in_q->bufs[index];
 780                 if (!((status & QDIO_STATUS_LOOK_FOR_ERROR) &&
 781                       qeth_check_qdio_errors(buffer->buffer,
 782                                              qdio_err, siga_err, "qinerr")))
 783                         qeth_l2_process_inbound_buffer(card, buffer, index);
 784                 /* clear buffer and give back to hardware */
 785                 qeth_put_buffer_pool_entry(card, buffer->pool_entry);
 786                 qeth_queue_input_buffer(card, index);
 787         }
 788         if (card->options.performance_stats)
 789                 card->perf_stats.inbound_time += qeth_get_micros() -
 790                         card->perf_stats.inbound_start_time;
 791 }
 792
 793 static int qeth_l2_open(struct net_device *dev)
 794 {
 795         struct qeth_card *card = netdev_priv(dev);
 796
 797         QETH_DBF_TEXT(trace, 4, "qethopen");
 798         if (card->state != CARD_STATE_SOFTSETUP)
 799                 return -ENODEV;
 800
 801         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
 802              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
 803                 QETH_DBF_TEXT(trace, 4, "nomacadr");
 804                 return -EPERM;
 805         }
 806         card->data.state = CH_STATE_UP;
 807         card->state = CARD_STATE_UP;
 808         card->dev->flags |= IFF_UP;
 809         netif_start_queue(dev);
 810
 811         if (!card->lan_online && netif_carrier_ok(dev))
 812                 netif_carrier_off(dev);
 813         return 0;
 814 }
 815
 816
 817 static int qeth_l2_stop(struct net_device *dev)
 818 {
 819         struct qeth_card *card = netdev_priv(dev);
 820
 821         QETH_DBF_TEXT(trace, 4, "qethstop");
 822         netif_tx_disable(dev);
 823         card->dev->flags &= ~IFF_UP;
 824         if (card->state == CARD_STATE_UP)
 825                 card->state = CARD_STATE_SOFTSETUP;
 826         return 0;
 827 }
 828
 829 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 830 {
 831         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 832
 833         INIT_LIST_HEAD(&card->vid_list);
 834         INIT_LIST_HEAD(&card->mc_list);
 835         card->options.layer2 = 1;
 836         card->discipline.input_handler = (qdio_handler_t *)
 837                 qeth_l2_qdio_input_handler;
 838         card->discipline.output_handler = (qdio_handler_t *)
 839                 qeth_qdio_output_handler;
 840         card->discipline.recover = qeth_l2_recover;
 841         return 0;
 842 }
 843
 844 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
 845 {
 846         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
 847
 848         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 849
 850         if (cgdev->state == CCWGROUP_ONLINE) {
 851                 card->use_hard_stop = 1;
 852                 qeth_l2_set_offline(cgdev);
 853         }
 854
 855         if (card->dev) {
 856                 unregister_netdev(card->dev);
 857                 card->dev = NULL;
 858         }
 859
 860         qeth_l2_del_all_mc(card);
 861         return;
 862 }
 863
 864 static struct ethtool_ops qeth_l2_ethtool_ops = {
 865         .get_link = ethtool_op_get_link,
 866         .get_tx_csum = ethtool_op_get_tx_csum,
 867         .set_tx_csum = ethtool_op_set_tx_hw_csum,
 868         .get_sg = ethtool_op_get_sg,
 869         .set_sg = ethtool_op_set_sg,
 870         .get_tso = ethtool_op_get_tso,
 871         .set_tso = ethtool_op_set_tso,
 872         .get_strings = qeth_core_get_strings,
 873         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 874         .get_stats_count = qeth_core_get_stats_count,
 875         .get_drvinfo = qeth_core_get_drvinfo,
 876 };
 877
 878 static struct ethtool_ops qeth_l2_osn_ops = {
 879         .get_strings = qeth_core_get_strings,
 880         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 881         .get_stats_count = qeth_core_get_stats_count,
 882         .get_drvinfo = qeth_core_get_drvinfo,
 883 };
 884
 885 static int qeth_l2_setup_netdev(struct qeth_card *card)
 886 {
 887         switch (card->info.type) {
 888         case QETH_CARD_TYPE_OSAE:
 889                 card->dev = alloc_etherdev(0);
 890                 break;
 891         case QETH_CARD_TYPE_IQD:
 892                 card->dev = alloc_netdev(0, "hsi%d", ether_setup);
 893                 break;
 894         case QETH_CARD_TYPE_OSN:
 895                 card->dev = alloc_netdev(0, "osn%d", ether_setup);
 896                 card->dev->flags |= IFF_NOARP;
 897                 break;
 898         default:
 899                 card->dev = alloc_etherdev(0);
 900         }
 901
 902         if (!card->dev)
 903                 return -ENODEV;
 904
 905         card->dev->priv = card;
 906         card->dev->tx_timeout = &qeth_tx_timeout;
 907         card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
 908         card->dev->open = qeth_l2_open;
 909         card->dev->stop = qeth_l2_stop;
 910         card->dev->hard_start_xmit = qeth_l2_hard_start_xmit;
 911         card->dev->do_ioctl = qeth_l2_do_ioctl;
 912         card->dev->get_stats = qeth_get_stats;
 913         card->dev->change_mtu = qeth_change_mtu;
 914         card->dev->set_multicast_list = qeth_l2_set_multicast_list;
 915         card->dev->vlan_rx_kill_vid = qeth_l2_vlan_rx_kill_vid;
 916         card->dev->vlan_rx_add_vid = qeth_l2_vlan_rx_add_vid;
 917         card->dev->set_mac_address = qeth_l2_set_mac_address;
 918         card->dev->mtu = card->info.initial_mtu;
 919         if (card->info.type != QETH_CARD_TYPE_OSN)
 920                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops);
 921         else
 922                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops);
 923         card->dev->features |= NETIF_F_HW_VLAN_FILTER;
 924         card->info.broadcast_capable = 1;
 925         qeth_l2_request_initial_mac(card);
 926         SET_NETDEV_DEV(card->dev, &card->gdev->dev);
 927         return register_netdev(card->dev);
 928 }
 929
 930 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 931 {
 932         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 933         int rc = 0;
 934         enum qeth_card_states recover_flag;
 935
 936         BUG_ON(!card);
 937         QETH_DBF_TEXT(setup, 2, "setonlin");
 938         QETH_DBF_HEX(setup, 2, &card, sizeof(void *));
 939
 940         qeth_set_allowed_threads(card, QETH_RECOVER_THREAD, 1);
 941         if (qeth_wait_for_threads(card, ~QETH_RECOVER_THREAD)) {
 942                 PRINT_WARN("set_online of card %s interrupted by user!\n",
 943                            CARD_BUS_ID(card));
 944                 return -ERESTARTSYS;
 945         }
 946
 947         recover_flag = card->state;
 948         rc = ccw_device_set_online(CARD_RDEV(card));
 949         if (rc) {
 950                 QETH_DBF_TEXT_(setup, 2, "1err%d", rc);
 951                 return -EIO;
 952         }
 953         rc = ccw_device_set_online(CARD_WDEV(card));
 954         if (rc) {
 955                 QETH_DBF_TEXT_(setup, 2, "1err%d", rc);
 956                 return -EIO;
 957         }
 958         rc = ccw_device_set_online(CARD_DDEV(card));
 959         if (rc) {
 960                 QETH_DBF_TEXT_(setup, 2, "1err%d", rc);
 961                 return -EIO;
 962         }
 963
 964         rc = qeth_core_hardsetup_card(card);
 965         if (rc) {
 966                 QETH_DBF_TEXT_(setup, 2, "2err%d", rc);
 967                 goto out_remove;
 968         }
 969
 970         if (!card->dev && qeth_l2_setup_netdev(card))
 971                 goto out_remove;
 972
 973         if (card->info.type != QETH_CARD_TYPE_OSN)
 974                 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
 975
 976         card->state = CARD_STATE_HARDSETUP;
 977         qeth_print_status_message(card);
 978
 979         /* softsetup */
 980         QETH_DBF_TEXT(setup, 2, "softsetp");
 981
 982         rc = qeth_send_startlan(card);
 983         if (rc) {
 984                 QETH_DBF_TEXT_(setup, 2, "1err%d", rc);
 985                 if (rc == 0xe080) {
 986                         PRINT_WARN("LAN on card %s if offline! "
 987                                    "Waiting for STARTLAN from card.\n",
 988                                    CARD_BUS_ID(card));
 989                         card->lan_online = 0;
 990                 }
 991                 return rc;
 992         } else
 993                 card->lan_online = 1;
 994
 995         if (card->info.type != QETH_CARD_TYPE_OSN) {
 996                 qeth_set_large_send(card, card->options.large_send);
 997                 qeth_l2_process_vlans(card, 0);
 998         }
 999
1000         netif_tx_disable(card->dev);
1001
1002         rc = qeth_init_qdio_queues(card);
1003         if (rc) {
1004                 QETH_DBF_TEXT_(setup, 2, "6err%d", rc);
1005                 goto out_remove;
1006         }
1007         card->state = CARD_STATE_SOFTSETUP;
1008         netif_carrier_on(card->dev);
1009
1010         qeth_set_allowed_threads(card, 0xffffffff, 0);
1011         if (recover_flag == CARD_STATE_RECOVER) {
1012                 if (recovery_mode &&
1013                     card->info.type != QETH_CARD_TYPE_OSN) {
1014                         qeth_l2_open(card->dev);
1015                 } else {
1016                         rtnl_lock();
1017                         dev_open(card->dev);
1018                         rtnl_unlock();
1019                 }
1020                 /* this also sets saved unicast addresses */
1021                 qeth_l2_set_multicast_list(card->dev);
1022         }
1023         /* let user_space know that device is online */
1024         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1025         return 0;
1026 out_remove:
1027         card->use_hard_stop = 1;
1028         qeth_l2_stop_card(card, 0);
1029         ccw_device_set_offline(CARD_DDEV(card));
1030         ccw_device_set_offline(CARD_WDEV(card));
1031         ccw_device_set_offline(CARD_RDEV(card));
1032         if (recover_flag == CARD_STATE_RECOVER)
1033                 card->state = CARD_STATE_RECOVER;
1034         else
1035                 card->state = CARD_STATE_DOWN;
1036         return -ENODEV;
1037 }
1038
1039 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1040 {
1041         return __qeth_l2_set_online(gdev, 0);
1042 }
1043
1044 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1045                                         int recovery_mode)
1046 {
1047         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1048         int rc = 0, rc2 = 0, rc3 = 0;
1049         enum qeth_card_states recover_flag;
1050
1051         QETH_DBF_TEXT(setup, 3, "setoffl");
1052         QETH_DBF_HEX(setup, 3, &card, sizeof(void *));
1053
1054         if (card->dev && netif_carrier_ok(card->dev))
1055                 netif_carrier_off(card->dev);
1056         recover_flag = card->state;
1057         if (qeth_l2_stop_card(card, recovery_mode) == -ERESTARTSYS) {
1058                 PRINT_WARN("Stopping card %s interrupted by user!\n",
1059                            CARD_BUS_ID(card));
1060                 return -ERESTARTSYS;
1061         }
1062         rc  = ccw_device_set_offline(CARD_DDEV(card));
1063         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1064         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1065         if (!rc)
1066                 rc = (rc2) ? rc2 : rc3;
1067         if (rc)
1068                 QETH_DBF_TEXT_(setup, 2, "1err%d", rc);
1069         if (recover_flag == CARD_STATE_UP)
1070                 card->state = CARD_STATE_RECOVER;
1071         /* let user_space know that device is offline */
1072         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1073         return 0;
1074 }
1075
1076 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1077 {
1078         return __qeth_l2_set_offline(cgdev, 0);
1079 }
1080
1081 static int qeth_l2_recover(void *ptr)
1082 {
1083         struct qeth_card *card;
1084         int rc = 0;
1085
1086         card = (struct qeth_card *) ptr;
1087         QETH_DBF_TEXT(trace, 2, "recover1");
1088         QETH_DBF_HEX(trace, 2, &card, sizeof(void *));
1089         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1090                 return 0;
1091         QETH_DBF_TEXT(trace, 2, "recover2");
1092         PRINT_WARN("Recovery of device %s started ...\n",
1093                    CARD_BUS_ID(card));
1094         card->use_hard_stop = 1;
1095         __qeth_l2_set_offline(card->gdev, 1);
1096         rc = __qeth_l2_set_online(card->gdev, 1);
1097         /* don't run another scheduled recovery */
1098         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1099         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1100         if (!rc)
1101                 PRINT_INFO("Device %s successfully recovered!\n",
1102                            CARD_BUS_ID(card));
1103         else
1104                 PRINT_INFO("Device %s could not be recovered!\n",
1105                            CARD_BUS_ID(card));
1106         return 0;
1107 }
1108
1109 static int __init qeth_l2_init(void)
1110 {
1111         PRINT_INFO("register layer 2 discipline\n");
1112         return 0;
1113 }
1114
1115 static void __exit qeth_l2_exit(void)
1116 {
1117         PRINT_INFO("unregister layer 2 discipline\n");
1118 }
1119
1120 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1121 {
1122         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1123         qeth_qdio_clear_card(card, 0);
1124         qeth_clear_qdio_buffers(card);
1125 }
1126
1127 struct ccwgroup_driver qeth_l2_ccwgroup_driver = {
1128         .probe = qeth_l2_probe_device,
1129         .remove = qeth_l2_remove_device,
1130         .set_online = qeth_l2_set_online,
1131         .set_offline = qeth_l2_set_offline,
1132         .shutdown = qeth_l2_shutdown,
1133 };
1134 EXPORT_SYMBOL_GPL(qeth_l2_ccwgroup_driver);
1135
1136 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1137                            struct qeth_cmd_buffer *iob)
1138 {
1139         unsigned long flags;
1140         int rc = 0;
1141
1142         QETH_DBF_TEXT(trace, 5, "osndctrd");
1143
1144         wait_event(card->wait_q,
1145                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1146         qeth_prepare_control_data(card, len, iob);
1147         QETH_DBF_TEXT(trace, 6, "osnoirqp");
1148         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1149         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1150                               (addr_t) iob, 0, 0);
1151         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1152         if (rc) {
1153                 PRINT_WARN("qeth_osn_send_control_data: "
1154                            "ccw_device_start rc = %i\n", rc);
1155                 QETH_DBF_TEXT_(trace, 2, " err%d", rc);
1156                 qeth_release_buffer(iob->channel, iob);
1157                 atomic_set(&card->write.irq_pending, 0);
1158                 wake_up(&card->wait_q);
1159         }
1160         return rc;
1161 }
1162
1163 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1164                         struct qeth_cmd_buffer *iob, int data_len)
1165 {
1166         u16 s1, s2;
1167
1168         QETH_DBF_TEXT(trace, 4, "osndipa");
1169
1170         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1171         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1172         s2 = (u16)data_len;
1173         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1174         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1175         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1176         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1177         return qeth_osn_send_control_data(card, s1, iob);
1178 }
1179
1180 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1181 {
1182         struct qeth_cmd_buffer *iob;
1183         struct qeth_card *card;
1184         int rc;
1185
1186         QETH_DBF_TEXT(trace, 2, "osnsdmc");
1187         if (!dev)
1188                 return -ENODEV;
1189         card = netdev_priv(dev);
1190         if (!card)
1191                 return -ENODEV;
1192         if ((card->state != CARD_STATE_UP) &&
1193             (card->state != CARD_STATE_SOFTSETUP))
1194                 return -ENODEV;
1195         iob = qeth_wait_for_buffer(&card->write);
1196         memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1197         rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1198         return rc;
1199 }
1200 EXPORT_SYMBOL(qeth_osn_assist);
1201
1202 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1203                   int (*assist_cb)(struct net_device *, void *),
1204                   int (*data_cb)(struct sk_buff *))
1205 {
1206         struct qeth_card *card;
1207
1208         QETH_DBF_TEXT(trace, 2, "osnreg");
1209         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1210         if (*dev == NULL)
1211                 return -ENODEV;
1212         card = netdev_priv(*dev);
1213         if (!card)
1214                 return -ENODEV;
1215         if ((assist_cb == NULL) || (data_cb == NULL))
1216                 return -EINVAL;
1217         card->osn_info.assist_cb = assist_cb;
1218         card->osn_info.data_cb = data_cb;
1219         return 0;
1220 }
1221 EXPORT_SYMBOL(qeth_osn_register);
1222
1223 void qeth_osn_deregister(struct net_device *dev)
1224 {
1225         struct qeth_card *card;
1226
1227         QETH_DBF_TEXT(trace, 2, "osndereg");
1228         if (!dev)
1229                 return;
1230         card = netdev_priv(dev);
1231         if (!card)
1232                 return;
1233         card->osn_info.assist_cb = NULL;
1234         card->osn_info.data_cb = NULL;
1235         return;
1236 }
1237 EXPORT_SYMBOL(qeth_osn_deregister);
1238
1239 module_init(qeth_l2_init);
1240 module_exit(qeth_l2_exit);
1241 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1242 MODULE_DESCRIPTION("qeth layer 2 discipline");
1243 MODULE_LICENSE("GPL");