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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 static int qeth_l2_set_offline(struct ccwgroup_device *);
  26 static int qeth_l2_stop(struct net_device *);
  27 static int qeth_l2_send_delmac(struct qeth_card *, __u8 *);
  28 static int qeth_l2_send_setdelmac(struct qeth_card *, __u8 *,
  29                            enum qeth_ipa_cmds,
  30                            int (*reply_cb) (struct qeth_card *,
  31                                             struct qeth_reply*,
  32                                             unsigned long));
  33 static void qeth_l2_set_multicast_list(struct net_device *);
  34 static int qeth_l2_recover(void *);
  35
  36 static int qeth_l2_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
  37 {
  38         struct qeth_card *card = netdev_priv(dev);
  39         struct mii_ioctl_data *mii_data;
  40         int rc = 0;
  41
  42         if (!card)
  43                 return -ENODEV;
  44
  45         if ((card->state != CARD_STATE_UP) &&
  46                 (card->state != CARD_STATE_SOFTSETUP))
  47                 return -ENODEV;
  48
  49         if (card->info.type == QETH_CARD_TYPE_OSN)
  50                 return -EPERM;
  51
  52         switch (cmd) {
  53         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
  54                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
  55                 break;
  56         case SIOC_QETH_GET_CARD_TYPE:
  57                 if ((card->info.type == QETH_CARD_TYPE_OSAE) &&
  58                     !card->info.guestlan)
  59                         return 1;
  60                 return 0;
  61                 break;
  62         case SIOCGMIIPHY:
  63                 mii_data = if_mii(rq);
  64                 mii_data->phy_id = 0;
  65                 break;
  66         case SIOCGMIIREG:
  67                 mii_data = if_mii(rq);
  68                 if (mii_data->phy_id != 0)
  69                         rc = -EINVAL;
  70                 else
  71                         mii_data->val_out = qeth_mdio_read(dev,
  72                                 mii_data->phy_id, mii_data->reg_num);
  73                 break;
  74         default:
  75                 rc = -EOPNOTSUPP;
  76         }
  77         if (rc)
  78                 QETH_DBF_TEXT_(TRACE, 2, "ioce%d", rc);
  79         return rc;
  80 }
  81
  82 static int qeth_l2_verify_dev(struct net_device *dev)
  83 {
  84         struct qeth_card *card;
  85         unsigned long flags;
  86         int rc = 0;
  87
  88         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
  89         list_for_each_entry(card, &qeth_core_card_list.list, list) {
  90                 if (card->dev == dev) {
  91                         rc = QETH_REAL_CARD;
  92                         break;
  93                 }
  94         }
  95         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
  96
  97         return rc;
  98 }
  99
 100 static struct net_device *qeth_l2_netdev_by_devno(unsigned char *read_dev_no)
 101 {
 102         struct qeth_card *card;
 103         struct net_device *ndev;
 104         unsigned char *readno;
 105         __u16 temp_dev_no, card_dev_no;
 106         char *endp;
 107         unsigned long flags;
 108
 109         ndev = NULL;
 110         memcpy(&temp_dev_no, read_dev_no, 2);
 111         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
 112         list_for_each_entry(card, &qeth_core_card_list.list, list) {
 113                 readno = CARD_RDEV_ID(card);
 114                 readno += (strlen(readno) - 4);
 115                 card_dev_no = simple_strtoul(readno, &endp, 16);
 116                 if (card_dev_no == temp_dev_no) {
 117                         ndev = card->dev;
 118                         break;
 119                 }
 120         }
 121         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
 122         return ndev;
 123 }
 124
 125 static int qeth_l2_send_setgroupmac_cb(struct qeth_card *card,
 126                                 struct qeth_reply *reply,
 127                                 unsigned long data)
 128 {
 129         struct qeth_ipa_cmd *cmd;
 130         __u8 *mac;
 131
 132         QETH_DBF_TEXT(TRACE, 2, "L2Sgmacb");
 133         cmd = (struct qeth_ipa_cmd *) data;
 134         mac = &cmd->data.setdelmac.mac[0];
 135         /* MAC already registered, needed in couple/uncouple case */
 136         if (cmd->hdr.return_code == 0x2005) {
 137                 PRINT_WARN("Group MAC %02x:%02x:%02x:%02x:%02x:%02x " \
 138                           "already existing on %s \n",
 139                           mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
 140                           QETH_CARD_IFNAME(card));
 141                 cmd->hdr.return_code = 0;
 142         }
 143         if (cmd->hdr.return_code)
 144                 PRINT_ERR("Could not set group MAC " \
 145                           "%02x:%02x:%02x:%02x:%02x:%02x on %s: %x\n",
 146                           mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
 147                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 148         return 0;
 149 }
 150
 151 static int qeth_l2_send_setgroupmac(struct qeth_card *card, __u8 *mac)
 152 {
 153         QETH_DBF_TEXT(TRACE, 2, "L2Sgmac");
 154         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETGMAC,
 155                                           qeth_l2_send_setgroupmac_cb);
 156 }
 157
 158 static int qeth_l2_send_delgroupmac_cb(struct qeth_card *card,
 159                                 struct qeth_reply *reply,
 160                                 unsigned long data)
 161 {
 162         struct qeth_ipa_cmd *cmd;
 163         __u8 *mac;
 164
 165         QETH_DBF_TEXT(TRACE, 2, "L2Dgmacb");
 166         cmd = (struct qeth_ipa_cmd *) data;
 167         mac = &cmd->data.setdelmac.mac[0];
 168         if (cmd->hdr.return_code)
 169                 PRINT_ERR("Could not delete group MAC " \
 170                           "%02x:%02x:%02x:%02x:%02x:%02x on %s: %x\n",
 171                           mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
 172                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 173         return 0;
 174 }
 175
 176 static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac)
 177 {
 178         QETH_DBF_TEXT(TRACE, 2, "L2Dgmac");
 179         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELGMAC,
 180                                           qeth_l2_send_delgroupmac_cb);
 181 }
 182
 183 static void qeth_l2_add_mc(struct qeth_card *card, __u8 *mac)
 184 {
 185         struct qeth_mc_mac *mc;
 186
 187         mc = kmalloc(sizeof(struct qeth_mc_mac), GFP_ATOMIC);
 188
 189         if (!mc) {
 190                 PRINT_ERR("no mem vor mc mac address\n");
 191                 return;
 192         }
 193
 194         memcpy(mc->mc_addr, mac, OSA_ADDR_LEN);
 195         mc->mc_addrlen = OSA_ADDR_LEN;
 196
 197         if (!qeth_l2_send_setgroupmac(card, mac))
 198                 list_add_tail(&mc->list, &card->mc_list);
 199         else
 200                 kfree(mc);
 201 }
 202
 203 static void qeth_l2_del_all_mc(struct qeth_card *card)
 204 {
 205         struct qeth_mc_mac *mc, *tmp;
 206
 207         spin_lock_bh(&card->mclock);
 208         list_for_each_entry_safe(mc, tmp, &card->mc_list, list) {
 209                 qeth_l2_send_delgroupmac(card, mc->mc_addr);
 210                 list_del(&mc->list);
 211                 kfree(mc);
 212         }
 213         spin_unlock_bh(&card->mclock);
 214 }
 215
 216 static void qeth_l2_get_packet_type(struct qeth_card *card,
 217                         struct qeth_hdr *hdr, struct sk_buff *skb)
 218 {
 219         __u16 hdr_mac;
 220
 221         if (!memcmp(skb->data + QETH_HEADER_SIZE,
 222                     skb->dev->broadcast, 6)) {
 223                 /* broadcast? */
 224                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 225                 return;
 226         }
 227         hdr_mac = *((__u16 *)skb->data);
 228         /* tr multicast? */
 229         switch (card->info.link_type) {
 230         case QETH_LINK_TYPE_HSTR:
 231         case QETH_LINK_TYPE_LANE_TR:
 232                 if ((hdr_mac == QETH_TR_MAC_NC) ||
 233                     (hdr_mac == QETH_TR_MAC_C))
 234                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 235                 else
 236                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 237                 break;
 238                 /* eth or so multicast? */
 239         default:
 240                 if ((hdr_mac == QETH_ETH_MAC_V4) ||
 241                      (hdr_mac == QETH_ETH_MAC_V6))
 242                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 243                 else
 244                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 245         }
 246 }
 247
 248 static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
 249                         struct sk_buff *skb, int ipv, int cast_type)
 250 {
 251         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)((skb->data) +
 252                                         QETH_HEADER_SIZE);
 253
 254         memset(hdr, 0, sizeof(struct qeth_hdr));
 255         hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
 256
 257         /* set byte byte 3 to casting flags */
 258         if (cast_type == RTN_MULTICAST)
 259                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 260         else if (cast_type == RTN_BROADCAST)
 261                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 262         else
 263                 qeth_l2_get_packet_type(card, hdr, skb);
 264
 265         hdr->hdr.l2.pkt_length = skb->len-QETH_HEADER_SIZE;
 266         /* VSWITCH relies on the VLAN
 267          * information to be present in
 268          * the QDIO header */
 269         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
 270                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
 271                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
 272         }
 273 }
 274
 275 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
 276                         struct qeth_reply *reply, unsigned long data)
 277 {
 278         struct qeth_ipa_cmd *cmd;
 279
 280         QETH_DBF_TEXT(TRACE, 2, "L2sdvcb");
 281         cmd = (struct qeth_ipa_cmd *) data;
 282         if (cmd->hdr.return_code) {
 283                 PRINT_ERR("Error in processing VLAN %i on %s: 0x%x. "
 284                           "Continuing\n", cmd->data.setdelvlan.vlan_id,
 285                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 286                 QETH_DBF_TEXT_(TRACE, 2, "L2VL%4x", cmd->hdr.command);
 287                 QETH_DBF_TEXT_(TRACE, 2, "L2%s", CARD_BUS_ID(card));
 288                 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
 289         }
 290         return 0;
 291 }
 292
 293 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
 294                                 enum qeth_ipa_cmds ipacmd)
 295 {
 296         struct qeth_ipa_cmd *cmd;
 297         struct qeth_cmd_buffer *iob;
 298
 299         QETH_DBF_TEXT_(TRACE, 4, "L2sdv%x", ipacmd);
 300         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 301         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 302         cmd->data.setdelvlan.vlan_id = i;
 303         return qeth_send_ipa_cmd(card, iob,
 304                                  qeth_l2_send_setdelvlan_cb, NULL);
 305 }
 306
 307 static void qeth_l2_process_vlans(struct qeth_card *card, int clear)
 308 {
 309         struct qeth_vlan_vid *id;
 310         QETH_DBF_TEXT(TRACE, 3, "L2prcvln");
 311         spin_lock_bh(&card->vlanlock);
 312         list_for_each_entry(id, &card->vid_list, list) {
 313                 if (clear)
 314                         qeth_l2_send_setdelvlan(card, id->vid,
 315                                 IPA_CMD_DELVLAN);
 316                 else
 317                         qeth_l2_send_setdelvlan(card, id->vid,
 318                                 IPA_CMD_SETVLAN);
 319         }
 320         spin_unlock_bh(&card->vlanlock);
 321 }
 322
 323 static void qeth_l2_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
 324 {
 325         struct qeth_card *card = netdev_priv(dev);
 326         struct qeth_vlan_vid *id;
 327
 328         QETH_DBF_TEXT_(TRACE, 4, "aid:%d", vid);
 329         id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
 330         if (id) {
 331                 id->vid = vid;
 332                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
 333                 spin_lock_bh(&card->vlanlock);
 334                 list_add_tail(&id->list, &card->vid_list);
 335                 spin_unlock_bh(&card->vlanlock);
 336         } else {
 337                 PRINT_ERR("no memory for vid\n");
 338         }
 339 }
 340
 341 static void qeth_l2_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
 342 {
 343         struct qeth_vlan_vid *id, *tmpid = NULL;
 344         struct qeth_card *card = netdev_priv(dev);
 345
 346         QETH_DBF_TEXT_(TRACE, 4, "kid:%d", vid);
 347         spin_lock_bh(&card->vlanlock);
 348         list_for_each_entry(id, &card->vid_list, list) {
 349                 if (id->vid == vid) {
 350                         list_del(&id->list);
 351                         tmpid = id;
 352                         break;
 353                 }
 354         }
 355         spin_unlock_bh(&card->vlanlock);
 356         if (tmpid) {
 357                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 358                 kfree(tmpid);
 359         }
 360         qeth_l2_set_multicast_list(card->dev);
 361 }
 362
 363 static int qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
 364 {
 365         int rc = 0;
 366
 367         QETH_DBF_TEXT(SETUP , 2, "stopcard");
 368         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 369
 370         qeth_set_allowed_threads(card, 0, 1);
 371         if (qeth_wait_for_threads(card, ~QETH_RECOVER_THREAD))
 372                 return -ERESTARTSYS;
 373         if (card->read.state == CH_STATE_UP &&
 374             card->write.state == CH_STATE_UP &&
 375             (card->state == CARD_STATE_UP)) {
 376                 if (recovery_mode &&
 377                     card->info.type != QETH_CARD_TYPE_OSN) {
 378                         qeth_l2_stop(card->dev);
 379                 } else {
 380                         rtnl_lock();
 381                         dev_close(card->dev);
 382                         rtnl_unlock();
 383                 }
 384                 if (!card->use_hard_stop) {
 385                         __u8 *mac = &card->dev->dev_addr[0];
 386                         rc = qeth_l2_send_delmac(card, mac);
 387                         QETH_DBF_TEXT_(SETUP, 2, "Lerr%d", rc);
 388                 }
 389                 card->state = CARD_STATE_SOFTSETUP;
 390         }
 391         if (card->state == CARD_STATE_SOFTSETUP) {
 392                 qeth_l2_process_vlans(card, 1);
 393                 qeth_l2_del_all_mc(card);
 394                 qeth_clear_ipacmd_list(card);
 395                 card->state = CARD_STATE_HARDSETUP;
 396         }
 397         if (card->state == CARD_STATE_HARDSETUP) {
 398                 qeth_qdio_clear_card(card, 0);
 399                 qeth_clear_qdio_buffers(card);
 400                 qeth_clear_working_pool_list(card);
 401                 card->state = CARD_STATE_DOWN;
 402         }
 403         if (card->state == CARD_STATE_DOWN) {
 404                 qeth_clear_cmd_buffers(&card->read);
 405                 qeth_clear_cmd_buffers(&card->write);
 406         }
 407         card->use_hard_stop = 0;
 408         return rc;
 409 }
 410
 411 static void qeth_l2_process_inbound_buffer(struct qeth_card *card,
 412                             struct qeth_qdio_buffer *buf, int index)
 413 {
 414         struct qdio_buffer_element *element;
 415         struct sk_buff *skb;
 416         struct qeth_hdr *hdr;
 417         int offset;
 418         unsigned int len;
 419
 420         /* get first element of current buffer */
 421         element = (struct qdio_buffer_element *)&buf->buffer->element[0];
 422         offset = 0;
 423         if (card->options.performance_stats)
 424                 card->perf_stats.bufs_rec++;
 425         while ((skb = qeth_core_get_next_skb(card, buf->buffer, &element,
 426                                        &offset, &hdr))) {
 427                 skb->dev = card->dev;
 428                 /* is device UP ? */
 429                 if (!(card->dev->flags & IFF_UP)) {
 430                         dev_kfree_skb_any(skb);
 431                         continue;
 432                 }
 433
 434                 switch (hdr->hdr.l2.id) {
 435                 case QETH_HEADER_TYPE_LAYER2:
 436                         skb->pkt_type = PACKET_HOST;
 437                         skb->protocol = eth_type_trans(skb, skb->dev);
 438                         if (card->options.checksum_type == NO_CHECKSUMMING)
 439                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 440                         else
 441                                 skb->ip_summed = CHECKSUM_NONE;
 442                         if (skb->protocol == htons(ETH_P_802_2))
 443                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
 444                         len = skb->len;
 445                         netif_rx(skb);
 446                         break;
 447                 case QETH_HEADER_TYPE_OSN:
 448                         skb_push(skb, sizeof(struct qeth_hdr));
 449                         skb_copy_to_linear_data(skb, hdr,
 450                                                 sizeof(struct qeth_hdr));
 451                         len = skb->len;
 452                         card->osn_info.data_cb(skb);
 453                         break;
 454                 default:
 455                         dev_kfree_skb_any(skb);
 456                         QETH_DBF_TEXT(TRACE, 3, "inbunkno");
 457                         QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
 458                         continue;
 459                 }
 460                 card->dev->last_rx = jiffies;
 461                 card->stats.rx_packets++;
 462                 card->stats.rx_bytes += len;
 463         }
 464 }
 465
 466 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
 467                            enum qeth_ipa_cmds ipacmd,
 468                            int (*reply_cb) (struct qeth_card *,
 469                                             struct qeth_reply*,
 470                                             unsigned long))
 471 {
 472         struct qeth_ipa_cmd *cmd;
 473         struct qeth_cmd_buffer *iob;
 474
 475         QETH_DBF_TEXT(TRACE, 2, "L2sdmac");
 476         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 477         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 478         cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
 479         memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
 480         return qeth_send_ipa_cmd(card, iob, reply_cb, NULL);
 481 }
 482
 483 static int qeth_l2_send_setmac_cb(struct qeth_card *card,
 484                            struct qeth_reply *reply,
 485                            unsigned long data)
 486 {
 487         struct qeth_ipa_cmd *cmd;
 488
 489         QETH_DBF_TEXT(TRACE, 2, "L2Smaccb");
 490         cmd = (struct qeth_ipa_cmd *) data;
 491         if (cmd->hdr.return_code) {
 492                 QETH_DBF_TEXT_(TRACE, 2, "L2er%x", cmd->hdr.return_code);
 493                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 494                 cmd->hdr.return_code = -EIO;
 495         } else {
 496                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 497                 memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
 498                        OSA_ADDR_LEN);
 499                 PRINT_INFO("MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x "
 500                            "successfully registered on device %s\n",
 501                            card->dev->dev_addr[0], card->dev->dev_addr[1],
 502                            card->dev->dev_addr[2], card->dev->dev_addr[3],
 503                            card->dev->dev_addr[4], card->dev->dev_addr[5],
 504                            card->dev->name);
 505         }
 506         return 0;
 507 }
 508
 509 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
 510 {
 511         QETH_DBF_TEXT(TRACE, 2, "L2Setmac");
 512         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
 513                                           qeth_l2_send_setmac_cb);
 514 }
 515
 516 static int qeth_l2_send_delmac_cb(struct qeth_card *card,
 517                            struct qeth_reply *reply,
 518                            unsigned long data)
 519 {
 520         struct qeth_ipa_cmd *cmd;
 521
 522         QETH_DBF_TEXT(TRACE, 2, "L2Dmaccb");
 523         cmd = (struct qeth_ipa_cmd *) data;
 524         if (cmd->hdr.return_code) {
 525                 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
 526                 cmd->hdr.return_code = -EIO;
 527                 return 0;
 528         }
 529         card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 530
 531         return 0;
 532 }
 533
 534 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
 535 {
 536         QETH_DBF_TEXT(TRACE, 2, "L2Delmac");
 537         if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
 538                 return 0;
 539         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
 540                                           qeth_l2_send_delmac_cb);
 541 }
 542
 543 static int qeth_l2_request_initial_mac(struct qeth_card *card)
 544 {
 545         int rc = 0;
 546         char vendor_pre[] = {0x02, 0x00, 0x00};
 547
 548         QETH_DBF_TEXT(SETUP, 2, "doL2init");
 549         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
 550
 551         rc = qeth_query_setadapterparms(card);
 552         if (rc) {
 553                 PRINT_WARN("could not query adapter parameters on device %s: "
 554                            "x%x\n", CARD_BUS_ID(card), rc);
 555         }
 556
 557         if (card->info.guestlan) {
 558                 rc = qeth_setadpparms_change_macaddr(card);
 559                 if (rc) {
 560                         PRINT_WARN("couldn't get MAC address on "
 561                            "device %s: x%x\n",
 562                            CARD_BUS_ID(card), rc);
 563                         QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 564                         return rc;
 565                 }
 566                 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN);
 567         } else {
 568                 random_ether_addr(card->dev->dev_addr);
 569                 memcpy(card->dev->dev_addr, vendor_pre, 3);
 570         }
 571         return 0;
 572 }
 573
 574 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 575 {
 576         struct sockaddr *addr = p;
 577         struct qeth_card *card = netdev_priv(dev);
 578         int rc = 0;
 579
 580         QETH_DBF_TEXT(TRACE, 3, "setmac");
 581
 582         if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
 583                 QETH_DBF_TEXT(TRACE, 3, "setmcINV");
 584                 return -EOPNOTSUPP;
 585         }
 586
 587         if (card->info.type == QETH_CARD_TYPE_OSN) {
 588                 PRINT_WARN("Setting MAC address on %s is not supported.\n",
 589                            dev->name);
 590                 QETH_DBF_TEXT(TRACE, 3, "setmcOSN");
 591                 return -EOPNOTSUPP;
 592         }
 593         QETH_DBF_TEXT_(TRACE, 3, "%s", CARD_BUS_ID(card));
 594         QETH_DBF_HEX(TRACE, 3, addr->sa_data, OSA_ADDR_LEN);
 595         rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
 596         if (!rc)
 597                 rc = qeth_l2_send_setmac(card, addr->sa_data);
 598         return rc;
 599 }
 600
 601 static void qeth_l2_set_multicast_list(struct net_device *dev)
 602 {
 603         struct qeth_card *card = netdev_priv(dev);
 604         struct dev_mc_list *dm;
 605
 606         if (card->info.type == QETH_CARD_TYPE_OSN)
 607                 return ;
 608
 609         QETH_DBF_TEXT(TRACE, 3, "setmulti");
 610         qeth_l2_del_all_mc(card);
 611         spin_lock_bh(&card->mclock);
 612         for (dm = dev->mc_list; dm; dm = dm->next)
 613                 qeth_l2_add_mc(card, dm->dmi_addr);
 614         spin_unlock_bh(&card->mclock);
 615         if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
 616                 return;
 617         qeth_setadp_promisc_mode(card);
 618 }
 619
 620 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 621 {
 622         int rc;
 623         struct qeth_hdr *hdr = NULL;
 624         int elements = 0;
 625         struct qeth_card *card = netdev_priv(dev);
 626         struct sk_buff *new_skb = skb;
 627         int ipv = qeth_get_ip_version(skb);
 628         int cast_type = qeth_get_cast_type(card, skb);
 629         struct qeth_qdio_out_q *queue = card->qdio.out_qs
 630                 [qeth_get_priority_queue(card, skb, ipv, cast_type)];
 631         int tx_bytes = skb->len;
 632         enum qeth_large_send_types large_send = QETH_LARGE_SEND_NO;
 633         struct qeth_eddp_context *ctx = NULL;
 634
 635         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
 636                 card->stats.tx_carrier_errors++;
 637                 goto tx_drop;
 638         }
 639
 640         if ((card->info.type == QETH_CARD_TYPE_OSN) &&
 641             (skb->protocol == htons(ETH_P_IPV6)))
 642                 goto tx_drop;
 643
 644         if (card->options.performance_stats) {
 645                 card->perf_stats.outbound_cnt++;
 646                 card->perf_stats.outbound_start_time = qeth_get_micros();
 647         }
 648         netif_stop_queue(dev);
 649
 650         if (skb_is_gso(skb))
 651                 large_send = QETH_LARGE_SEND_EDDP;
 652
 653         if (card->info.type == QETH_CARD_TYPE_OSN)
 654                 hdr = (struct qeth_hdr *)skb->data;
 655         else {
 656                 /* create a clone with writeable headroom */
 657                 new_skb = skb_realloc_headroom(skb, sizeof(struct qeth_hdr));
 658                 if (!new_skb)
 659                         goto tx_drop;
 660                 hdr = (struct qeth_hdr *)skb_push(new_skb,
 661                                                 sizeof(struct qeth_hdr));
 662                 qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 663         }
 664
 665         if (large_send == QETH_LARGE_SEND_EDDP) {
 666                 ctx = qeth_eddp_create_context(card, new_skb, hdr,
 667                                                 skb->sk->sk_protocol);
 668                 if (ctx == NULL) {
 669                         PRINT_WARN("could not create eddp context\n");
 670                         goto tx_drop;
 671                 }
 672         } else {
 673                 elements = qeth_get_elements_no(card, (void *)hdr, new_skb, 0);
 674                 if (!elements)
 675                         goto tx_drop;
 676         }
 677
 678         if ((large_send == QETH_LARGE_SEND_NO) &&
 679             (skb->ip_summed == CHECKSUM_PARTIAL))
 680                 qeth_tx_csum(new_skb);
 681
 682         if (card->info.type != QETH_CARD_TYPE_IQD)
 683                 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
 684                                          elements, ctx);
 685         else
 686                 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
 687                                               elements, ctx);
 688         if (!rc) {
 689                 card->stats.tx_packets++;
 690                 card->stats.tx_bytes += tx_bytes;
 691                 if (new_skb != skb)
 692                         dev_kfree_skb_any(skb);
 693                 if (card->options.performance_stats) {
 694                         if (large_send != QETH_LARGE_SEND_NO) {
 695                                 card->perf_stats.large_send_bytes += tx_bytes;
 696                                 card->perf_stats.large_send_cnt++;
 697                         }
 698                         if (skb_shinfo(new_skb)->nr_frags > 0) {
 699                                 card->perf_stats.sg_skbs_sent++;
 700                                 /* nr_frags + skb->data */
 701                                 card->perf_stats.sg_frags_sent +=
 702                                         skb_shinfo(new_skb)->nr_frags + 1;
 703                         }
 704                 }
 705
 706                 if (ctx != NULL) {
 707                         qeth_eddp_put_context(ctx);
 708                         dev_kfree_skb_any(new_skb);
 709                 }
 710         } else {
 711                 if (ctx != NULL)
 712                         qeth_eddp_put_context(ctx);
 713
 714                 if (rc == -EBUSY) {
 715                         if (new_skb != skb)
 716                                 dev_kfree_skb_any(new_skb);
 717                         return NETDEV_TX_BUSY;
 718                 } else
 719                         goto tx_drop;
 720         }
 721
 722         netif_wake_queue(dev);
 723         if (card->options.performance_stats)
 724                 card->perf_stats.outbound_time += qeth_get_micros() -
 725                         card->perf_stats.outbound_start_time;
 726         return rc;
 727
 728 tx_drop:
 729         card->stats.tx_dropped++;
 730         card->stats.tx_errors++;
 731         if ((new_skb != skb) && new_skb)
 732                 dev_kfree_skb_any(new_skb);
 733         dev_kfree_skb_any(skb);
 734         return NETDEV_TX_OK;
 735 }
 736
 737 static void qeth_l2_qdio_input_handler(struct ccw_device *ccwdev,
 738                         unsigned int status, unsigned int qdio_err,
 739                         unsigned int siga_err, unsigned int queue,
 740                         int first_element, int count, unsigned long card_ptr)
 741 {
 742         struct net_device *net_dev;
 743         struct qeth_card *card;
 744         struct qeth_qdio_buffer *buffer;
 745         int index;
 746         int i;
 747
 748         card = (struct qeth_card *) card_ptr;
 749         net_dev = card->dev;
 750         if (card->options.performance_stats) {
 751                 card->perf_stats.inbound_cnt++;
 752                 card->perf_stats.inbound_start_time = qeth_get_micros();
 753         }
 754         if (status & QDIO_STATUS_LOOK_FOR_ERROR) {
 755                 if (status & QDIO_STATUS_ACTIVATE_CHECK_CONDITION) {
 756                         QETH_DBF_TEXT(TRACE, 1, "qdinchk");
 757                         QETH_DBF_TEXT_(TRACE, 1, "%s", CARD_BUS_ID(card));
 758                         QETH_DBF_TEXT_(TRACE, 1, "%04X%04X", first_element,
 759                                         count);
 760                         QETH_DBF_TEXT_(TRACE, 1, "%04X%04X", queue, status);
 761                         qeth_schedule_recovery(card);
 762                         return;
 763                 }
 764         }
 765         for (i = first_element; i < (first_element + count); ++i) {
 766                 index = i % QDIO_MAX_BUFFERS_PER_Q;
 767                 buffer = &card->qdio.in_q->bufs[index];
 768                 if (!((status & QDIO_STATUS_LOOK_FOR_ERROR) &&
 769                       qeth_check_qdio_errors(buffer->buffer,
 770                                              qdio_err, siga_err, "qinerr")))
 771                         qeth_l2_process_inbound_buffer(card, buffer, index);
 772                 /* clear buffer and give back to hardware */
 773                 qeth_put_buffer_pool_entry(card, buffer->pool_entry);
 774                 qeth_queue_input_buffer(card, index);
 775         }
 776         if (card->options.performance_stats)
 777                 card->perf_stats.inbound_time += qeth_get_micros() -
 778                         card->perf_stats.inbound_start_time;
 779 }
 780
 781 static int qeth_l2_open(struct net_device *dev)
 782 {
 783         struct qeth_card *card = netdev_priv(dev);
 784
 785         QETH_DBF_TEXT(TRACE, 4, "qethopen");
 786         if (card->state != CARD_STATE_SOFTSETUP)
 787                 return -ENODEV;
 788
 789         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
 790              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
 791                 QETH_DBF_TEXT(TRACE, 4, "nomacadr");
 792                 return -EPERM;
 793         }
 794         card->data.state = CH_STATE_UP;
 795         card->state = CARD_STATE_UP;
 796         card->dev->flags |= IFF_UP;
 797         netif_start_queue(dev);
 798
 799         if (!card->lan_online && netif_carrier_ok(dev))
 800                 netif_carrier_off(dev);
 801         return 0;
 802 }
 803
 804
 805 static int qeth_l2_stop(struct net_device *dev)
 806 {
 807         struct qeth_card *card = netdev_priv(dev);
 808
 809         QETH_DBF_TEXT(TRACE, 4, "qethstop");
 810         netif_tx_disable(dev);
 811         card->dev->flags &= ~IFF_UP;
 812         if (card->state == CARD_STATE_UP)
 813                 card->state = CARD_STATE_SOFTSETUP;
 814         return 0;
 815 }
 816
 817 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 818 {
 819         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 820
 821         INIT_LIST_HEAD(&card->vid_list);
 822         INIT_LIST_HEAD(&card->mc_list);
 823         card->options.layer2 = 1;
 824         card->discipline.input_handler = (qdio_handler_t *)
 825                 qeth_l2_qdio_input_handler;
 826         card->discipline.output_handler = (qdio_handler_t *)
 827                 qeth_qdio_output_handler;
 828         card->discipline.recover = qeth_l2_recover;
 829         return 0;
 830 }
 831
 832 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
 833 {
 834         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
 835
 836         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 837
 838         if (cgdev->state == CCWGROUP_ONLINE) {
 839                 card->use_hard_stop = 1;
 840                 qeth_l2_set_offline(cgdev);
 841         }
 842
 843         if (card->dev) {
 844                 unregister_netdev(card->dev);
 845                 card->dev = NULL;
 846         }
 847
 848         qeth_l2_del_all_mc(card);
 849         return;
 850 }
 851
 852 static int qeth_l2_ethtool_set_tso(struct net_device *dev, u32 data)
 853 {
 854         struct qeth_card *card = netdev_priv(dev);
 855
 856         if (data) {
 857                 if (card->options.large_send == QETH_LARGE_SEND_NO) {
 858                         card->options.large_send = QETH_LARGE_SEND_EDDP;
 859                         dev->features |= NETIF_F_TSO;
 860                 }
 861         } else {
 862                 dev->features &= ~NETIF_F_TSO;
 863                 card->options.large_send = QETH_LARGE_SEND_NO;
 864         }
 865         return 0;
 866 }
 867
 868 static struct ethtool_ops qeth_l2_ethtool_ops = {
 869         .get_link = ethtool_op_get_link,
 870         .get_tx_csum = ethtool_op_get_tx_csum,
 871         .set_tx_csum = ethtool_op_set_tx_hw_csum,
 872         .get_sg = ethtool_op_get_sg,
 873         .set_sg = ethtool_op_set_sg,
 874         .get_tso = ethtool_op_get_tso,
 875         .set_tso = qeth_l2_ethtool_set_tso,
 876         .get_strings = qeth_core_get_strings,
 877         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 878         .get_stats_count = qeth_core_get_stats_count,
 879         .get_drvinfo = qeth_core_get_drvinfo,
 880         .get_settings = qeth_core_ethtool_get_settings,
 881 };
 882
 883 static struct ethtool_ops qeth_l2_osn_ops = {
 884         .get_strings = qeth_core_get_strings,
 885         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 886         .get_stats_count = qeth_core_get_stats_count,
 887         .get_drvinfo = qeth_core_get_drvinfo,
 888 };
 889
 890 static int qeth_l2_setup_netdev(struct qeth_card *card)
 891 {
 892         switch (card->info.type) {
 893         case QETH_CARD_TYPE_OSAE:
 894                 card->dev = alloc_etherdev(0);
 895                 break;
 896         case QETH_CARD_TYPE_IQD:
 897                 card->dev = alloc_netdev(0, "hsi%d", ether_setup);
 898                 break;
 899         case QETH_CARD_TYPE_OSN:
 900                 card->dev = alloc_netdev(0, "osn%d", ether_setup);
 901                 card->dev->flags |= IFF_NOARP;
 902                 break;
 903         default:
 904                 card->dev = alloc_etherdev(0);
 905         }
 906
 907         if (!card->dev)
 908                 return -ENODEV;
 909
 910         card->dev->priv = card;
 911         card->dev->tx_timeout = &qeth_tx_timeout;
 912         card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
 913         card->dev->open = qeth_l2_open;
 914         card->dev->stop = qeth_l2_stop;
 915         card->dev->hard_start_xmit = qeth_l2_hard_start_xmit;
 916         card->dev->do_ioctl = qeth_l2_do_ioctl;
 917         card->dev->get_stats = qeth_get_stats;
 918         card->dev->change_mtu = qeth_change_mtu;
 919         card->dev->set_multicast_list = qeth_l2_set_multicast_list;
 920         card->dev->vlan_rx_kill_vid = qeth_l2_vlan_rx_kill_vid;
 921         card->dev->vlan_rx_add_vid = qeth_l2_vlan_rx_add_vid;
 922         card->dev->set_mac_address = qeth_l2_set_mac_address;
 923         card->dev->mtu = card->info.initial_mtu;
 924         if (card->info.type != QETH_CARD_TYPE_OSN)
 925                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops);
 926         else
 927                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops);
 928         card->dev->features |= NETIF_F_HW_VLAN_FILTER;
 929         card->info.broadcast_capable = 1;
 930         qeth_l2_request_initial_mac(card);
 931         SET_NETDEV_DEV(card->dev, &card->gdev->dev);
 932         return register_netdev(card->dev);
 933 }
 934
 935 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 936 {
 937         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 938         int rc = 0;
 939         enum qeth_card_states recover_flag;
 940
 941         BUG_ON(!card);
 942         QETH_DBF_TEXT(SETUP, 2, "setonlin");
 943         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 944
 945         qeth_set_allowed_threads(card, QETH_RECOVER_THREAD, 1);
 946         if (qeth_wait_for_threads(card, ~QETH_RECOVER_THREAD)) {
 947                 PRINT_WARN("set_online of card %s interrupted by user!\n",
 948                            CARD_BUS_ID(card));
 949                 return -ERESTARTSYS;
 950         }
 951
 952         recover_flag = card->state;
 953         rc = ccw_device_set_online(CARD_RDEV(card));
 954         if (rc) {
 955                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 956                 return -EIO;
 957         }
 958         rc = ccw_device_set_online(CARD_WDEV(card));
 959         if (rc) {
 960                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 961                 return -EIO;
 962         }
 963         rc = ccw_device_set_online(CARD_DDEV(card));
 964         if (rc) {
 965                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 966                 return -EIO;
 967         }
 968
 969         rc = qeth_core_hardsetup_card(card);
 970         if (rc) {
 971                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
 972                 goto out_remove;
 973         }
 974
 975         if (!card->dev && qeth_l2_setup_netdev(card))
 976                 goto out_remove;
 977
 978         if (card->info.type != QETH_CARD_TYPE_OSN)
 979                 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
 980
 981         card->state = CARD_STATE_HARDSETUP;
 982         qeth_print_status_message(card);
 983
 984         /* softsetup */
 985         QETH_DBF_TEXT(SETUP, 2, "softsetp");
 986
 987         rc = qeth_send_startlan(card);
 988         if (rc) {
 989                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 990                 if (rc == 0xe080) {
 991                         PRINT_WARN("LAN on card %s if offline! "
 992                                    "Waiting for STARTLAN from card.\n",
 993                                    CARD_BUS_ID(card));
 994                         card->lan_online = 0;
 995                 }
 996                 return rc;
 997         } else
 998                 card->lan_online = 1;
 999
1000         if (card->info.type != QETH_CARD_TYPE_OSN) {
1001                 qeth_set_large_send(card, card->options.large_send);
1002                 qeth_l2_process_vlans(card, 0);
1003         }
1004
1005         netif_tx_disable(card->dev);
1006
1007         rc = qeth_init_qdio_queues(card);
1008         if (rc) {
1009                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1010                 goto out_remove;
1011         }
1012         card->state = CARD_STATE_SOFTSETUP;
1013         netif_carrier_on(card->dev);
1014
1015         qeth_set_allowed_threads(card, 0xffffffff, 0);
1016         if (recover_flag == CARD_STATE_RECOVER) {
1017                 if (recovery_mode &&
1018                     card->info.type != QETH_CARD_TYPE_OSN) {
1019                         qeth_l2_open(card->dev);
1020                 } else {
1021                         rtnl_lock();
1022                         dev_open(card->dev);
1023                         rtnl_unlock();
1024                 }
1025                 /* this also sets saved unicast addresses */
1026                 qeth_l2_set_multicast_list(card->dev);
1027         }
1028         /* let user_space know that device is online */
1029         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1030         return 0;
1031 out_remove:
1032         card->use_hard_stop = 1;
1033         qeth_l2_stop_card(card, 0);
1034         ccw_device_set_offline(CARD_DDEV(card));
1035         ccw_device_set_offline(CARD_WDEV(card));
1036         ccw_device_set_offline(CARD_RDEV(card));
1037         if (recover_flag == CARD_STATE_RECOVER)
1038                 card->state = CARD_STATE_RECOVER;
1039         else
1040                 card->state = CARD_STATE_DOWN;
1041         return -ENODEV;
1042 }
1043
1044 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1045 {
1046         return __qeth_l2_set_online(gdev, 0);
1047 }
1048
1049 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1050                                         int recovery_mode)
1051 {
1052         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1053         int rc = 0, rc2 = 0, rc3 = 0;
1054         enum qeth_card_states recover_flag;
1055
1056         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1057         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1058
1059         if (card->dev && netif_carrier_ok(card->dev))
1060                 netif_carrier_off(card->dev);
1061         recover_flag = card->state;
1062         if (qeth_l2_stop_card(card, recovery_mode) == -ERESTARTSYS) {
1063                 PRINT_WARN("Stopping card %s interrupted by user!\n",
1064                            CARD_BUS_ID(card));
1065                 return -ERESTARTSYS;
1066         }
1067         rc  = ccw_device_set_offline(CARD_DDEV(card));
1068         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1069         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1070         if (!rc)
1071                 rc = (rc2) ? rc2 : rc3;
1072         if (rc)
1073                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1074         if (recover_flag == CARD_STATE_UP)
1075                 card->state = CARD_STATE_RECOVER;
1076         /* let user_space know that device is offline */
1077         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1078         return 0;
1079 }
1080
1081 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1082 {
1083         return __qeth_l2_set_offline(cgdev, 0);
1084 }
1085
1086 static int qeth_l2_recover(void *ptr)
1087 {
1088         struct qeth_card *card;
1089         int rc = 0;
1090
1091         card = (struct qeth_card *) ptr;
1092         QETH_DBF_TEXT(TRACE, 2, "recover1");
1093         QETH_DBF_HEX(TRACE, 2, &card, sizeof(void *));
1094         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1095                 return 0;
1096         QETH_DBF_TEXT(TRACE, 2, "recover2");
1097         PRINT_WARN("Recovery of device %s started ...\n",
1098                    CARD_BUS_ID(card));
1099         card->use_hard_stop = 1;
1100         __qeth_l2_set_offline(card->gdev, 1);
1101         rc = __qeth_l2_set_online(card->gdev, 1);
1102         /* don't run another scheduled recovery */
1103         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1104         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1105         if (!rc)
1106                 PRINT_INFO("Device %s successfully recovered!\n",
1107                            CARD_BUS_ID(card));
1108         else
1109                 PRINT_INFO("Device %s could not be recovered!\n",
1110                            CARD_BUS_ID(card));
1111         return 0;
1112 }
1113
1114 static int __init qeth_l2_init(void)
1115 {
1116         PRINT_INFO("register layer 2 discipline\n");
1117         return 0;
1118 }
1119
1120 static void __exit qeth_l2_exit(void)
1121 {
1122         PRINT_INFO("unregister layer 2 discipline\n");
1123 }
1124
1125 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1126 {
1127         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1128         qeth_qdio_clear_card(card, 0);
1129         qeth_clear_qdio_buffers(card);
1130 }
1131
1132 struct ccwgroup_driver qeth_l2_ccwgroup_driver = {
1133         .probe = qeth_l2_probe_device,
1134         .remove = qeth_l2_remove_device,
1135         .set_online = qeth_l2_set_online,
1136         .set_offline = qeth_l2_set_offline,
1137         .shutdown = qeth_l2_shutdown,
1138 };
1139 EXPORT_SYMBOL_GPL(qeth_l2_ccwgroup_driver);
1140
1141 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1142                            struct qeth_cmd_buffer *iob)
1143 {
1144         unsigned long flags;
1145         int rc = 0;
1146
1147         QETH_DBF_TEXT(TRACE, 5, "osndctrd");
1148
1149         wait_event(card->wait_q,
1150                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1151         qeth_prepare_control_data(card, len, iob);
1152         QETH_DBF_TEXT(TRACE, 6, "osnoirqp");
1153         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1154         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1155                               (addr_t) iob, 0, 0);
1156         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1157         if (rc) {
1158                 PRINT_WARN("qeth_osn_send_control_data: "
1159                            "ccw_device_start rc = %i\n", rc);
1160                 QETH_DBF_TEXT_(TRACE, 2, " err%d", rc);
1161                 qeth_release_buffer(iob->channel, iob);
1162                 atomic_set(&card->write.irq_pending, 0);
1163                 wake_up(&card->wait_q);
1164         }
1165         return rc;
1166 }
1167
1168 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1169                         struct qeth_cmd_buffer *iob, int data_len)
1170 {
1171         u16 s1, s2;
1172
1173         QETH_DBF_TEXT(TRACE, 4, "osndipa");
1174
1175         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1176         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1177         s2 = (u16)data_len;
1178         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1179         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1180         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1181         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1182         return qeth_osn_send_control_data(card, s1, iob);
1183 }
1184
1185 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1186 {
1187         struct qeth_cmd_buffer *iob;
1188         struct qeth_card *card;
1189         int rc;
1190
1191         QETH_DBF_TEXT(TRACE, 2, "osnsdmc");
1192         if (!dev)
1193                 return -ENODEV;
1194         card = netdev_priv(dev);
1195         if (!card)
1196                 return -ENODEV;
1197         if ((card->state != CARD_STATE_UP) &&
1198             (card->state != CARD_STATE_SOFTSETUP))
1199                 return -ENODEV;
1200         iob = qeth_wait_for_buffer(&card->write);
1201         memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1202         rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1203         return rc;
1204 }
1205 EXPORT_SYMBOL(qeth_osn_assist);
1206
1207 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1208                   int (*assist_cb)(struct net_device *, void *),
1209                   int (*data_cb)(struct sk_buff *))
1210 {
1211         struct qeth_card *card;
1212
1213         QETH_DBF_TEXT(TRACE, 2, "osnreg");
1214         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1215         if (*dev == NULL)
1216                 return -ENODEV;
1217         card = netdev_priv(*dev);
1218         if (!card)
1219                 return -ENODEV;
1220         if ((assist_cb == NULL) || (data_cb == NULL))
1221                 return -EINVAL;
1222         card->osn_info.assist_cb = assist_cb;
1223         card->osn_info.data_cb = data_cb;
1224         return 0;
1225 }
1226 EXPORT_SYMBOL(qeth_osn_register);
1227
1228 void qeth_osn_deregister(struct net_device *dev)
1229 {
1230         struct qeth_card *card;
1231
1232         QETH_DBF_TEXT(TRACE, 2, "osndereg");
1233         if (!dev)
1234                 return;
1235         card = netdev_priv(dev);
1236         if (!card)
1237                 return;
1238         card->osn_info.assist_cb = NULL;
1239         card->osn_info.data_cb = NULL;
1240         return;
1241 }
1242 EXPORT_SYMBOL(qeth_osn_deregister);
1243
1244 module_init(qeth_l2_init);
1245 module_exit(qeth_l2_exit);
1246 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1247 MODULE_DESCRIPTION("qeth layer 2 discipline");
1248 MODULE_LICENSE("GPL");