err.no Git - linux-2.6/blob - drivers/s390/net/qeth_l2_main.c

   1 /*
   2  *  drivers/s390/net/qeth_l2_main.c
   3  *
   4  *    Copyright IBM Corp. 2007
   5  *    Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
   6  *               Frank Pavlic <fpavlic@de.ibm.com>,
   7  *               Thomas Spatzier <tspat@de.ibm.com>,
   8  *               Frank Blaschka <frank.blaschka@de.ibm.com>
   9  */
  10
  11 #include <linux/module.h>
  12 #include <linux/moduleparam.h>
  13 #include <linux/string.h>
  14 #include <linux/errno.h>
  15 #include <linux/kernel.h>
  16 #include <linux/etherdevice.h>
  17 #include <linux/mii.h>
  18 #include <linux/ip.h>
  19
  20 #include <asm/s390_rdev.h>
  21
  22 #include "qeth_core.h"
  23 #include "qeth_core_offl.h"
  24
  25 static int qeth_l2_set_offline(struct ccwgroup_device *);
  26 static int qeth_l2_stop(struct net_device *);
  27 static int qeth_l2_send_delmac(struct qeth_card *, __u8 *);
  28 static int qeth_l2_send_setdelmac(struct qeth_card *, __u8 *,
  29                            enum qeth_ipa_cmds,
  30                            int (*reply_cb) (struct qeth_card *,
  31                                             struct qeth_reply*,
  32                                             unsigned long));
  33 static void qeth_l2_set_multicast_list(struct net_device *);
  34 static int qeth_l2_recover(void *);
  35
  36 static int qeth_l2_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
  37 {
  38         struct qeth_card *card = netdev_priv(dev);
  39         struct mii_ioctl_data *mii_data;
  40         int rc = 0;
  41
  42         if (!card)
  43                 return -ENODEV;
  44
  45         if ((card->state != CARD_STATE_UP) &&
  46                 (card->state != CARD_STATE_SOFTSETUP))
  47                 return -ENODEV;
  48
  49         if (card->info.type == QETH_CARD_TYPE_OSN)
  50                 return -EPERM;
  51
  52         switch (cmd) {
  53         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
  54                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
  55                 break;
  56         case SIOC_QETH_GET_CARD_TYPE:
  57                 if ((card->info.type == QETH_CARD_TYPE_OSAE) &&
  58                     !card->info.guestlan)
  59                         return 1;
  60                 return 0;
  61                 break;
  62         case SIOCGMIIPHY:
  63                 mii_data = if_mii(rq);
  64                 mii_data->phy_id = 0;
  65                 break;
  66         case SIOCGMIIREG:
  67                 mii_data = if_mii(rq);
  68                 if (mii_data->phy_id != 0)
  69                         rc = -EINVAL;
  70                 else
  71                         mii_data->val_out = qeth_mdio_read(dev,
  72                                 mii_data->phy_id, mii_data->reg_num);
  73                 break;
  74         default:
  75                 rc = -EOPNOTSUPP;
  76         }
  77         if (rc)
  78                 QETH_DBF_TEXT_(TRACE, 2, "ioce%d", rc);
  79         return rc;
  80 }
  81
  82 static int qeth_l2_verify_dev(struct net_device *dev)
  83 {
  84         struct qeth_card *card;
  85         unsigned long flags;
  86         int rc = 0;
  87
  88         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
  89         list_for_each_entry(card, &qeth_core_card_list.list, list) {
  90                 if (card->dev == dev) {
  91                         rc = QETH_REAL_CARD;
  92                         break;
  93                 }
  94         }
  95         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
  96
  97         return rc;
  98 }
  99
 100 static struct net_device *qeth_l2_netdev_by_devno(unsigned char *read_dev_no)
 101 {
 102         struct qeth_card *card;
 103         struct net_device *ndev;
 104         __u16 temp_dev_no;
 105         unsigned long flags;
 106         struct ccw_dev_id read_devid;
 107
 108         ndev = NULL;
 109         memcpy(&temp_dev_no, read_dev_no, 2);
 110         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
 111         list_for_each_entry(card, &qeth_core_card_list.list, list) {
 112                 ccw_device_get_id(CARD_RDEV(card), &read_devid);
 113                 if (read_devid.devno == temp_dev_no) {
 114                         ndev = card->dev;
 115                         break;
 116                 }
 117         }
 118         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
 119         return ndev;
 120 }
 121
 122 static int qeth_l2_send_setgroupmac_cb(struct qeth_card *card,
 123                                 struct qeth_reply *reply,
 124                                 unsigned long data)
 125 {
 126         struct qeth_ipa_cmd *cmd;
 127         __u8 *mac;
 128
 129         QETH_DBF_TEXT(TRACE, 2, "L2Sgmacb");
 130         cmd = (struct qeth_ipa_cmd *) data;
 131         mac = &cmd->data.setdelmac.mac[0];
 132         /* MAC already registered, needed in couple/uncouple case */
 133         if (cmd->hdr.return_code == 0x2005) {
 134                 PRINT_WARN("Group MAC %02x:%02x:%02x:%02x:%02x:%02x " \
 135                           "already existing on %s \n",
 136                           mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
 137                           QETH_CARD_IFNAME(card));
 138                 cmd->hdr.return_code = 0;
 139         }
 140         if (cmd->hdr.return_code)
 141                 PRINT_ERR("Could not set group MAC " \
 142                           "%02x:%02x:%02x:%02x:%02x:%02x on %s: %x\n",
 143                           mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
 144                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 145         return 0;
 146 }
 147
 148 static int qeth_l2_send_setgroupmac(struct qeth_card *card, __u8 *mac)
 149 {
 150         QETH_DBF_TEXT(TRACE, 2, "L2Sgmac");
 151         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETGMAC,
 152                                           qeth_l2_send_setgroupmac_cb);
 153 }
 154
 155 static int qeth_l2_send_delgroupmac_cb(struct qeth_card *card,
 156                                 struct qeth_reply *reply,
 157                                 unsigned long data)
 158 {
 159         struct qeth_ipa_cmd *cmd;
 160         __u8 *mac;
 161
 162         QETH_DBF_TEXT(TRACE, 2, "L2Dgmacb");
 163         cmd = (struct qeth_ipa_cmd *) data;
 164         mac = &cmd->data.setdelmac.mac[0];
 165         if (cmd->hdr.return_code)
 166                 PRINT_ERR("Could not delete group MAC " \
 167                           "%02x:%02x:%02x:%02x:%02x:%02x on %s: %x\n",
 168                           mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
 169                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 170         return 0;
 171 }
 172
 173 static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac)
 174 {
 175         QETH_DBF_TEXT(TRACE, 2, "L2Dgmac");
 176         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELGMAC,
 177                                           qeth_l2_send_delgroupmac_cb);
 178 }
 179
 180 static void qeth_l2_add_mc(struct qeth_card *card, __u8 *mac)
 181 {
 182         struct qeth_mc_mac *mc;
 183
 184         mc = kmalloc(sizeof(struct qeth_mc_mac), GFP_ATOMIC);
 185
 186         if (!mc) {
 187                 PRINT_ERR("no mem vor mc mac address\n");
 188                 return;
 189         }
 190
 191         memcpy(mc->mc_addr, mac, OSA_ADDR_LEN);
 192         mc->mc_addrlen = OSA_ADDR_LEN;
 193
 194         if (!qeth_l2_send_setgroupmac(card, mac))
 195                 list_add_tail(&mc->list, &card->mc_list);
 196         else
 197                 kfree(mc);
 198 }
 199
 200 static void qeth_l2_del_all_mc(struct qeth_card *card)
 201 {
 202         struct qeth_mc_mac *mc, *tmp;
 203
 204         spin_lock_bh(&card->mclock);
 205         list_for_each_entry_safe(mc, tmp, &card->mc_list, list) {
 206                 qeth_l2_send_delgroupmac(card, mc->mc_addr);
 207                 list_del(&mc->list);
 208                 kfree(mc);
 209         }
 210         spin_unlock_bh(&card->mclock);
 211 }
 212
 213 static void qeth_l2_get_packet_type(struct qeth_card *card,
 214                         struct qeth_hdr *hdr, struct sk_buff *skb)
 215 {
 216         __u16 hdr_mac;
 217
 218         if (!memcmp(skb->data + QETH_HEADER_SIZE,
 219                     skb->dev->broadcast, 6)) {
 220                 /* broadcast? */
 221                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 222                 return;
 223         }
 224         hdr_mac = *((__u16 *)skb->data);
 225         /* tr multicast? */
 226         switch (card->info.link_type) {
 227         case QETH_LINK_TYPE_HSTR:
 228         case QETH_LINK_TYPE_LANE_TR:
 229                 if ((hdr_mac == QETH_TR_MAC_NC) ||
 230                     (hdr_mac == QETH_TR_MAC_C))
 231                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 232                 else
 233                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 234                 break;
 235                 /* eth or so multicast? */
 236         default:
 237                 if ((hdr_mac == QETH_ETH_MAC_V4) ||
 238                      (hdr_mac == QETH_ETH_MAC_V6))
 239                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 240                 else
 241                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 242         }
 243 }
 244
 245 static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
 246                         struct sk_buff *skb, int ipv, int cast_type)
 247 {
 248         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)((skb->data) +
 249                                         QETH_HEADER_SIZE);
 250
 251         memset(hdr, 0, sizeof(struct qeth_hdr));
 252         hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
 253
 254         /* set byte byte 3 to casting flags */
 255         if (cast_type == RTN_MULTICAST)
 256                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 257         else if (cast_type == RTN_BROADCAST)
 258                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 259         else
 260                 qeth_l2_get_packet_type(card, hdr, skb);
 261
 262         hdr->hdr.l2.pkt_length = skb->len-QETH_HEADER_SIZE;
 263         /* VSWITCH relies on the VLAN
 264          * information to be present in
 265          * the QDIO header */
 266         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
 267                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
 268                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
 269         }
 270 }
 271
 272 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
 273                         struct qeth_reply *reply, unsigned long data)
 274 {
 275         struct qeth_ipa_cmd *cmd;
 276
 277         QETH_DBF_TEXT(TRACE, 2, "L2sdvcb");
 278         cmd = (struct qeth_ipa_cmd *) data;
 279         if (cmd->hdr.return_code) {
 280                 PRINT_ERR("Error in processing VLAN %i on %s: 0x%x. "
 281                           "Continuing\n", cmd->data.setdelvlan.vlan_id,
 282                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 283                 QETH_DBF_TEXT_(TRACE, 2, "L2VL%4x", cmd->hdr.command);
 284                 QETH_DBF_TEXT_(TRACE, 2, "L2%s", CARD_BUS_ID(card));
 285                 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
 286         }
 287         return 0;
 288 }
 289
 290 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
 291                                 enum qeth_ipa_cmds ipacmd)
 292 {
 293         struct qeth_ipa_cmd *cmd;
 294         struct qeth_cmd_buffer *iob;
 295
 296         QETH_DBF_TEXT_(TRACE, 4, "L2sdv%x", ipacmd);
 297         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 298         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 299         cmd->data.setdelvlan.vlan_id = i;
 300         return qeth_send_ipa_cmd(card, iob,
 301                                  qeth_l2_send_setdelvlan_cb, NULL);
 302 }
 303
 304 static void qeth_l2_process_vlans(struct qeth_card *card, int clear)
 305 {
 306         struct qeth_vlan_vid *id;
 307         QETH_DBF_TEXT(TRACE, 3, "L2prcvln");
 308         spin_lock_bh(&card->vlanlock);
 309         list_for_each_entry(id, &card->vid_list, list) {
 310                 if (clear)
 311                         qeth_l2_send_setdelvlan(card, id->vid,
 312                                 IPA_CMD_DELVLAN);
 313                 else
 314                         qeth_l2_send_setdelvlan(card, id->vid,
 315                                 IPA_CMD_SETVLAN);
 316         }
 317         spin_unlock_bh(&card->vlanlock);
 318 }
 319
 320 static void qeth_l2_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
 321 {
 322         struct qeth_card *card = netdev_priv(dev);
 323         struct qeth_vlan_vid *id;
 324
 325         QETH_DBF_TEXT_(TRACE, 4, "aid:%d", vid);
 326         id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
 327         if (id) {
 328                 id->vid = vid;
 329                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
 330                 spin_lock_bh(&card->vlanlock);
 331                 list_add_tail(&id->list, &card->vid_list);
 332                 spin_unlock_bh(&card->vlanlock);
 333         } else {
 334                 PRINT_ERR("no memory for vid\n");
 335         }
 336 }
 337
 338 static void qeth_l2_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
 339 {
 340         struct qeth_vlan_vid *id, *tmpid = NULL;
 341         struct qeth_card *card = netdev_priv(dev);
 342
 343         QETH_DBF_TEXT_(TRACE, 4, "kid:%d", vid);
 344         spin_lock_bh(&card->vlanlock);
 345         list_for_each_entry(id, &card->vid_list, list) {
 346                 if (id->vid == vid) {
 347                         list_del(&id->list);
 348                         tmpid = id;
 349                         break;
 350                 }
 351         }
 352         spin_unlock_bh(&card->vlanlock);
 353         if (tmpid) {
 354                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 355                 kfree(tmpid);
 356         }
 357         qeth_l2_set_multicast_list(card->dev);
 358 }
 359
 360 static int qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
 361 {
 362         int rc = 0;
 363
 364         QETH_DBF_TEXT(SETUP , 2, "stopcard");
 365         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 366
 367         qeth_set_allowed_threads(card, 0, 1);
 368         if (qeth_wait_for_threads(card, ~QETH_RECOVER_THREAD))
 369                 return -ERESTARTSYS;
 370         if (card->read.state == CH_STATE_UP &&
 371             card->write.state == CH_STATE_UP &&
 372             (card->state == CARD_STATE_UP)) {
 373                 if (recovery_mode &&
 374                     card->info.type != QETH_CARD_TYPE_OSN) {
 375                         qeth_l2_stop(card->dev);
 376                 } else {
 377                         rtnl_lock();
 378                         dev_close(card->dev);
 379                         rtnl_unlock();
 380                 }
 381                 if (!card->use_hard_stop) {
 382                         __u8 *mac = &card->dev->dev_addr[0];
 383                         rc = qeth_l2_send_delmac(card, mac);
 384                         QETH_DBF_TEXT_(SETUP, 2, "Lerr%d", rc);
 385                 }
 386                 card->state = CARD_STATE_SOFTSETUP;
 387         }
 388         if (card->state == CARD_STATE_SOFTSETUP) {
 389                 qeth_l2_process_vlans(card, 1);
 390                 qeth_l2_del_all_mc(card);
 391                 qeth_clear_ipacmd_list(card);
 392                 card->state = CARD_STATE_HARDSETUP;
 393         }
 394         if (card->state == CARD_STATE_HARDSETUP) {
 395                 qeth_qdio_clear_card(card, 0);
 396                 qeth_clear_qdio_buffers(card);
 397                 qeth_clear_working_pool_list(card);
 398                 card->state = CARD_STATE_DOWN;
 399         }
 400         if (card->state == CARD_STATE_DOWN) {
 401                 qeth_clear_cmd_buffers(&card->read);
 402                 qeth_clear_cmd_buffers(&card->write);
 403         }
 404         card->use_hard_stop = 0;
 405         return rc;
 406 }
 407
 408 static void qeth_l2_process_inbound_buffer(struct qeth_card *card,
 409                             struct qeth_qdio_buffer *buf, int index)
 410 {
 411         struct qdio_buffer_element *element;
 412         struct sk_buff *skb;
 413         struct qeth_hdr *hdr;
 414         int offset;
 415         unsigned int len;
 416
 417         /* get first element of current buffer */
 418         element = (struct qdio_buffer_element *)&buf->buffer->element[0];
 419         offset = 0;
 420         if (card->options.performance_stats)
 421                 card->perf_stats.bufs_rec++;
 422         while ((skb = qeth_core_get_next_skb(card, buf->buffer, &element,
 423                                        &offset, &hdr))) {
 424                 skb->dev = card->dev;
 425                 /* is device UP ? */
 426                 if (!(card->dev->flags & IFF_UP)) {
 427                         dev_kfree_skb_any(skb);
 428                         continue;
 429                 }
 430
 431                 switch (hdr->hdr.l2.id) {
 432                 case QETH_HEADER_TYPE_LAYER2:
 433                         skb->pkt_type = PACKET_HOST;
 434                         skb->protocol = eth_type_trans(skb, skb->dev);
 435                         if (card->options.checksum_type == NO_CHECKSUMMING)
 436                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 437                         else
 438                                 skb->ip_summed = CHECKSUM_NONE;
 439                         if (skb->protocol == htons(ETH_P_802_2))
 440                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
 441                         len = skb->len;
 442                         netif_rx(skb);
 443                         break;
 444                 case QETH_HEADER_TYPE_OSN:
 445                         skb_push(skb, sizeof(struct qeth_hdr));
 446                         skb_copy_to_linear_data(skb, hdr,
 447                                                 sizeof(struct qeth_hdr));
 448                         len = skb->len;
 449                         card->osn_info.data_cb(skb);
 450                         break;
 451                 default:
 452                         dev_kfree_skb_any(skb);
 453                         QETH_DBF_TEXT(TRACE, 3, "inbunkno");
 454                         QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
 455                         continue;
 456                 }
 457                 card->dev->last_rx = jiffies;
 458                 card->stats.rx_packets++;
 459                 card->stats.rx_bytes += len;
 460         }
 461 }
 462
 463 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
 464                            enum qeth_ipa_cmds ipacmd,
 465                            int (*reply_cb) (struct qeth_card *,
 466                                             struct qeth_reply*,
 467                                             unsigned long))
 468 {
 469         struct qeth_ipa_cmd *cmd;
 470         struct qeth_cmd_buffer *iob;
 471
 472         QETH_DBF_TEXT(TRACE, 2, "L2sdmac");
 473         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 474         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 475         cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
 476         memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
 477         return qeth_send_ipa_cmd(card, iob, reply_cb, NULL);
 478 }
 479
 480 static int qeth_l2_send_setmac_cb(struct qeth_card *card,
 481                            struct qeth_reply *reply,
 482                            unsigned long data)
 483 {
 484         struct qeth_ipa_cmd *cmd;
 485
 486         QETH_DBF_TEXT(TRACE, 2, "L2Smaccb");
 487         cmd = (struct qeth_ipa_cmd *) data;
 488         if (cmd->hdr.return_code) {
 489                 QETH_DBF_TEXT_(TRACE, 2, "L2er%x", cmd->hdr.return_code);
 490                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 491                 cmd->hdr.return_code = -EIO;
 492         } else {
 493                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 494                 memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
 495                        OSA_ADDR_LEN);
 496                 PRINT_INFO("MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x "
 497                            "successfully registered on device %s\n",
 498                            card->dev->dev_addr[0], card->dev->dev_addr[1],
 499                            card->dev->dev_addr[2], card->dev->dev_addr[3],
 500                            card->dev->dev_addr[4], card->dev->dev_addr[5],
 501                            card->dev->name);
 502         }
 503         return 0;
 504 }
 505
 506 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
 507 {
 508         QETH_DBF_TEXT(TRACE, 2, "L2Setmac");
 509         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
 510                                           qeth_l2_send_setmac_cb);
 511 }
 512
 513 static int qeth_l2_send_delmac_cb(struct qeth_card *card,
 514                            struct qeth_reply *reply,
 515                            unsigned long data)
 516 {
 517         struct qeth_ipa_cmd *cmd;
 518
 519         QETH_DBF_TEXT(TRACE, 2, "L2Dmaccb");
 520         cmd = (struct qeth_ipa_cmd *) data;
 521         if (cmd->hdr.return_code) {
 522                 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
 523                 cmd->hdr.return_code = -EIO;
 524                 return 0;
 525         }
 526         card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 527
 528         return 0;
 529 }
 530
 531 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
 532 {
 533         QETH_DBF_TEXT(TRACE, 2, "L2Delmac");
 534         if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
 535                 return 0;
 536         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
 537                                           qeth_l2_send_delmac_cb);
 538 }
 539
 540 static int qeth_l2_request_initial_mac(struct qeth_card *card)
 541 {
 542         int rc = 0;
 543         char vendor_pre[] = {0x02, 0x00, 0x00};
 544
 545         QETH_DBF_TEXT(SETUP, 2, "doL2init");
 546         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
 547
 548         rc = qeth_query_setadapterparms(card);
 549         if (rc) {
 550                 PRINT_WARN("could not query adapter parameters on device %s: "
 551                            "x%x\n", CARD_BUS_ID(card), rc);
 552         }
 553
 554         if (card->info.guestlan) {
 555                 rc = qeth_setadpparms_change_macaddr(card);
 556                 if (rc) {
 557                         PRINT_WARN("couldn't get MAC address on "
 558                            "device %s: x%x\n",
 559                            CARD_BUS_ID(card), rc);
 560                         QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 561                         return rc;
 562                 }
 563                 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN);
 564         } else {
 565                 random_ether_addr(card->dev->dev_addr);
 566                 memcpy(card->dev->dev_addr, vendor_pre, 3);
 567         }
 568         return 0;
 569 }
 570
 571 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 572 {
 573         struct sockaddr *addr = p;
 574         struct qeth_card *card = netdev_priv(dev);
 575         int rc = 0;
 576
 577         QETH_DBF_TEXT(TRACE, 3, "setmac");
 578
 579         if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
 580                 QETH_DBF_TEXT(TRACE, 3, "setmcINV");
 581                 return -EOPNOTSUPP;
 582         }
 583
 584         if (card->info.type == QETH_CARD_TYPE_OSN) {
 585                 PRINT_WARN("Setting MAC address on %s is not supported.\n",
 586                            dev->name);
 587                 QETH_DBF_TEXT(TRACE, 3, "setmcOSN");
 588                 return -EOPNOTSUPP;
 589         }
 590         QETH_DBF_TEXT_(TRACE, 3, "%s", CARD_BUS_ID(card));
 591         QETH_DBF_HEX(TRACE, 3, addr->sa_data, OSA_ADDR_LEN);
 592         rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
 593         if (!rc)
 594                 rc = qeth_l2_send_setmac(card, addr->sa_data);
 595         return rc;
 596 }
 597
 598 static void qeth_l2_set_multicast_list(struct net_device *dev)
 599 {
 600         struct qeth_card *card = netdev_priv(dev);
 601         struct dev_mc_list *dm;
 602
 603         if (card->info.type == QETH_CARD_TYPE_OSN)
 604                 return ;
 605
 606         QETH_DBF_TEXT(TRACE, 3, "setmulti");
 607         qeth_l2_del_all_mc(card);
 608         spin_lock_bh(&card->mclock);
 609         for (dm = dev->mc_list; dm; dm = dm->next)
 610                 qeth_l2_add_mc(card, dm->dmi_addr);
 611         spin_unlock_bh(&card->mclock);
 612         if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
 613                 return;
 614         qeth_setadp_promisc_mode(card);
 615 }
 616
 617 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 618 {
 619         int rc;
 620         struct qeth_hdr *hdr = NULL;
 621         int elements = 0;
 622         struct qeth_card *card = netdev_priv(dev);
 623         struct sk_buff *new_skb = skb;
 624         int ipv = qeth_get_ip_version(skb);
 625         int cast_type = qeth_get_cast_type(card, skb);
 626         struct qeth_qdio_out_q *queue = card->qdio.out_qs
 627                 [qeth_get_priority_queue(card, skb, ipv, cast_type)];
 628         int tx_bytes = skb->len;
 629         enum qeth_large_send_types large_send = QETH_LARGE_SEND_NO;
 630         struct qeth_eddp_context *ctx = NULL;
 631
 632         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
 633                 card->stats.tx_carrier_errors++;
 634                 goto tx_drop;
 635         }
 636
 637         if ((card->info.type == QETH_CARD_TYPE_OSN) &&
 638             (skb->protocol == htons(ETH_P_IPV6)))
 639                 goto tx_drop;
 640
 641         if (card->options.performance_stats) {
 642                 card->perf_stats.outbound_cnt++;
 643                 card->perf_stats.outbound_start_time = qeth_get_micros();
 644         }
 645         netif_stop_queue(dev);
 646
 647         if (skb_is_gso(skb))
 648                 large_send = QETH_LARGE_SEND_EDDP;
 649
 650         if (card->info.type == QETH_CARD_TYPE_OSN)
 651                 hdr = (struct qeth_hdr *)skb->data;
 652         else {
 653                 /* create a clone with writeable headroom */
 654                 new_skb = skb_realloc_headroom(skb, sizeof(struct qeth_hdr));
 655                 if (!new_skb)
 656                         goto tx_drop;
 657                 hdr = (struct qeth_hdr *)skb_push(new_skb,
 658                                                 sizeof(struct qeth_hdr));
 659                 qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 660         }
 661
 662         if (large_send == QETH_LARGE_SEND_EDDP) {
 663                 ctx = qeth_eddp_create_context(card, new_skb, hdr,
 664                                                 skb->sk->sk_protocol);
 665                 if (ctx == NULL) {
 666                         PRINT_WARN("could not create eddp context\n");
 667                         goto tx_drop;
 668                 }
 669         } else {
 670                 elements = qeth_get_elements_no(card, (void *)hdr, new_skb, 0);
 671                 if (!elements)
 672                         goto tx_drop;
 673         }
 674
 675         if ((large_send == QETH_LARGE_SEND_NO) &&
 676             (skb->ip_summed == CHECKSUM_PARTIAL))
 677                 qeth_tx_csum(new_skb);
 678
 679         if (card->info.type != QETH_CARD_TYPE_IQD)
 680                 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
 681                                          elements, ctx);
 682         else
 683                 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
 684                                               elements, ctx);
 685         if (!rc) {
 686                 card->stats.tx_packets++;
 687                 card->stats.tx_bytes += tx_bytes;
 688                 if (new_skb != skb)
 689                         dev_kfree_skb_any(skb);
 690                 if (card->options.performance_stats) {
 691                         if (large_send != QETH_LARGE_SEND_NO) {
 692                                 card->perf_stats.large_send_bytes += tx_bytes;
 693                                 card->perf_stats.large_send_cnt++;
 694                         }
 695                         if (skb_shinfo(new_skb)->nr_frags > 0) {
 696                                 card->perf_stats.sg_skbs_sent++;
 697                                 /* nr_frags + skb->data */
 698                                 card->perf_stats.sg_frags_sent +=
 699                                         skb_shinfo(new_skb)->nr_frags + 1;
 700                         }
 701                 }
 702
 703                 if (ctx != NULL) {
 704                         qeth_eddp_put_context(ctx);
 705                         dev_kfree_skb_any(new_skb);
 706                 }
 707         } else {
 708                 if (ctx != NULL)
 709                         qeth_eddp_put_context(ctx);
 710
 711                 if (rc == -EBUSY) {
 712                         if (new_skb != skb)
 713                                 dev_kfree_skb_any(new_skb);
 714                         return NETDEV_TX_BUSY;
 715                 } else
 716                         goto tx_drop;
 717         }
 718
 719         netif_wake_queue(dev);
 720         if (card->options.performance_stats)
 721                 card->perf_stats.outbound_time += qeth_get_micros() -
 722                         card->perf_stats.outbound_start_time;
 723         return rc;
 724
 725 tx_drop:
 726         card->stats.tx_dropped++;
 727         card->stats.tx_errors++;
 728         if ((new_skb != skb) && new_skb)
 729                 dev_kfree_skb_any(new_skb);
 730         dev_kfree_skb_any(skb);
 731         return NETDEV_TX_OK;
 732 }
 733
 734 static void qeth_l2_qdio_input_handler(struct ccw_device *ccwdev,
 735                         unsigned int status, unsigned int qdio_err,
 736                         unsigned int siga_err, unsigned int queue,
 737                         int first_element, int count, unsigned long card_ptr)
 738 {
 739         struct net_device *net_dev;
 740         struct qeth_card *card;
 741         struct qeth_qdio_buffer *buffer;
 742         int index;
 743         int i;
 744
 745         card = (struct qeth_card *) card_ptr;
 746         net_dev = card->dev;
 747         if (card->options.performance_stats) {
 748                 card->perf_stats.inbound_cnt++;
 749                 card->perf_stats.inbound_start_time = qeth_get_micros();
 750         }
 751         if (status & QDIO_STATUS_LOOK_FOR_ERROR) {
 752                 if (status & QDIO_STATUS_ACTIVATE_CHECK_CONDITION) {
 753                         QETH_DBF_TEXT(TRACE, 1, "qdinchk");
 754                         QETH_DBF_TEXT_(TRACE, 1, "%s", CARD_BUS_ID(card));
 755                         QETH_DBF_TEXT_(TRACE, 1, "%04X%04X", first_element,
 756                                         count);
 757                         QETH_DBF_TEXT_(TRACE, 1, "%04X%04X", queue, status);
 758                         qeth_schedule_recovery(card);
 759                         return;
 760                 }
 761         }
 762         for (i = first_element; i < (first_element + count); ++i) {
 763                 index = i % QDIO_MAX_BUFFERS_PER_Q;
 764                 buffer = &card->qdio.in_q->bufs[index];
 765                 if (!((status & QDIO_STATUS_LOOK_FOR_ERROR) &&
 766                       qeth_check_qdio_errors(buffer->buffer,
 767                                              qdio_err, siga_err, "qinerr")))
 768                         qeth_l2_process_inbound_buffer(card, buffer, index);
 769                 /* clear buffer and give back to hardware */
 770                 qeth_put_buffer_pool_entry(card, buffer->pool_entry);
 771                 qeth_queue_input_buffer(card, index);
 772         }
 773         if (card->options.performance_stats)
 774                 card->perf_stats.inbound_time += qeth_get_micros() -
 775                         card->perf_stats.inbound_start_time;
 776 }
 777
 778 static int qeth_l2_open(struct net_device *dev)
 779 {
 780         struct qeth_card *card = netdev_priv(dev);
 781
 782         QETH_DBF_TEXT(TRACE, 4, "qethopen");
 783         if (card->state != CARD_STATE_SOFTSETUP)
 784                 return -ENODEV;
 785
 786         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
 787              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
 788                 QETH_DBF_TEXT(TRACE, 4, "nomacadr");
 789                 return -EPERM;
 790         }
 791         card->data.state = CH_STATE_UP;
 792         card->state = CARD_STATE_UP;
 793         card->dev->flags |= IFF_UP;
 794         netif_start_queue(dev);
 795
 796         if (!card->lan_online && netif_carrier_ok(dev))
 797                 netif_carrier_off(dev);
 798         return 0;
 799 }
 800
 801
 802 static int qeth_l2_stop(struct net_device *dev)
 803 {
 804         struct qeth_card *card = netdev_priv(dev);
 805
 806         QETH_DBF_TEXT(TRACE, 4, "qethstop");
 807         netif_tx_disable(dev);
 808         card->dev->flags &= ~IFF_UP;
 809         if (card->state == CARD_STATE_UP)
 810                 card->state = CARD_STATE_SOFTSETUP;
 811         return 0;
 812 }
 813
 814 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 815 {
 816         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 817
 818         INIT_LIST_HEAD(&card->vid_list);
 819         INIT_LIST_HEAD(&card->mc_list);
 820         card->options.layer2 = 1;
 821         card->discipline.input_handler = (qdio_handler_t *)
 822                 qeth_l2_qdio_input_handler;
 823         card->discipline.output_handler = (qdio_handler_t *)
 824                 qeth_qdio_output_handler;
 825         card->discipline.recover = qeth_l2_recover;
 826         return 0;
 827 }
 828
 829 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
 830 {
 831         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
 832
 833         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 834
 835         if (cgdev->state == CCWGROUP_ONLINE) {
 836                 card->use_hard_stop = 1;
 837                 qeth_l2_set_offline(cgdev);
 838         }
 839
 840         if (card->dev) {
 841                 unregister_netdev(card->dev);
 842                 card->dev = NULL;
 843         }
 844
 845         qeth_l2_del_all_mc(card);
 846         return;
 847 }
 848
 849 static int qeth_l2_ethtool_set_tso(struct net_device *dev, u32 data)
 850 {
 851         struct qeth_card *card = netdev_priv(dev);
 852
 853         if (data) {
 854                 if (card->options.large_send == QETH_LARGE_SEND_NO) {
 855                         card->options.large_send = QETH_LARGE_SEND_EDDP;
 856                         dev->features |= NETIF_F_TSO;
 857                 }
 858         } else {
 859                 dev->features &= ~NETIF_F_TSO;
 860                 card->options.large_send = QETH_LARGE_SEND_NO;
 861         }
 862         return 0;
 863 }
 864
 865 static struct ethtool_ops qeth_l2_ethtool_ops = {
 866         .get_link = ethtool_op_get_link,
 867         .get_tx_csum = ethtool_op_get_tx_csum,
 868         .set_tx_csum = ethtool_op_set_tx_hw_csum,
 869         .get_sg = ethtool_op_get_sg,
 870         .set_sg = ethtool_op_set_sg,
 871         .get_tso = ethtool_op_get_tso,
 872         .set_tso = qeth_l2_ethtool_set_tso,
 873         .get_strings = qeth_core_get_strings,
 874         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 875         .get_stats_count = qeth_core_get_stats_count,
 876         .get_drvinfo = qeth_core_get_drvinfo,
 877         .get_settings = qeth_core_ethtool_get_settings,
 878 };
 879
 880 static struct ethtool_ops qeth_l2_osn_ops = {
 881         .get_strings = qeth_core_get_strings,
 882         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 883         .get_stats_count = qeth_core_get_stats_count,
 884         .get_drvinfo = qeth_core_get_drvinfo,
 885 };
 886
 887 static int qeth_l2_setup_netdev(struct qeth_card *card)
 888 {
 889         switch (card->info.type) {
 890         case QETH_CARD_TYPE_OSAE:
 891                 card->dev = alloc_etherdev(0);
 892                 break;
 893         case QETH_CARD_TYPE_IQD:
 894                 card->dev = alloc_netdev(0, "hsi%d", ether_setup);
 895                 break;
 896         case QETH_CARD_TYPE_OSN:
 897                 card->dev = alloc_netdev(0, "osn%d", ether_setup);
 898                 card->dev->flags |= IFF_NOARP;
 899                 break;
 900         default:
 901                 card->dev = alloc_etherdev(0);
 902         }
 903
 904         if (!card->dev)
 905                 return -ENODEV;
 906
 907         card->dev->priv = card;
 908         card->dev->tx_timeout = &qeth_tx_timeout;
 909         card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
 910         card->dev->open = qeth_l2_open;
 911         card->dev->stop = qeth_l2_stop;
 912         card->dev->hard_start_xmit = qeth_l2_hard_start_xmit;
 913         card->dev->do_ioctl = qeth_l2_do_ioctl;
 914         card->dev->get_stats = qeth_get_stats;
 915         card->dev->change_mtu = qeth_change_mtu;
 916         card->dev->set_multicast_list = qeth_l2_set_multicast_list;
 917         card->dev->vlan_rx_kill_vid = qeth_l2_vlan_rx_kill_vid;
 918         card->dev->vlan_rx_add_vid = qeth_l2_vlan_rx_add_vid;
 919         card->dev->set_mac_address = qeth_l2_set_mac_address;
 920         card->dev->mtu = card->info.initial_mtu;
 921         if (card->info.type != QETH_CARD_TYPE_OSN)
 922                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops);
 923         else
 924                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops);
 925         card->dev->features |= NETIF_F_HW_VLAN_FILTER;
 926         card->info.broadcast_capable = 1;
 927         qeth_l2_request_initial_mac(card);
 928         SET_NETDEV_DEV(card->dev, &card->gdev->dev);
 929         return register_netdev(card->dev);
 930 }
 931
 932 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 933 {
 934         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 935         int rc = 0;
 936         enum qeth_card_states recover_flag;
 937
 938         BUG_ON(!card);
 939         QETH_DBF_TEXT(SETUP, 2, "setonlin");
 940         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 941
 942         qeth_set_allowed_threads(card, QETH_RECOVER_THREAD, 1);
 943         if (qeth_wait_for_threads(card, ~QETH_RECOVER_THREAD)) {
 944                 PRINT_WARN("set_online of card %s interrupted by user!\n",
 945                            CARD_BUS_ID(card));
 946                 return -ERESTARTSYS;
 947         }
 948
 949         recover_flag = card->state;
 950         rc = ccw_device_set_online(CARD_RDEV(card));
 951         if (rc) {
 952                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 953                 return -EIO;
 954         }
 955         rc = ccw_device_set_online(CARD_WDEV(card));
 956         if (rc) {
 957                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 958                 return -EIO;
 959         }
 960         rc = ccw_device_set_online(CARD_DDEV(card));
 961         if (rc) {
 962                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 963                 return -EIO;
 964         }
 965
 966         rc = qeth_core_hardsetup_card(card);
 967         if (rc) {
 968                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
 969                 goto out_remove;
 970         }
 971
 972         if (!card->dev && qeth_l2_setup_netdev(card))
 973                 goto out_remove;
 974
 975         if (card->info.type != QETH_CARD_TYPE_OSN)
 976                 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
 977
 978         card->state = CARD_STATE_HARDSETUP;
 979         qeth_print_status_message(card);
 980
 981         /* softsetup */
 982         QETH_DBF_TEXT(SETUP, 2, "softsetp");
 983
 984         rc = qeth_send_startlan(card);
 985         if (rc) {
 986                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 987                 if (rc == 0xe080) {
 988                         PRINT_WARN("LAN on card %s if offline! "
 989                                    "Waiting for STARTLAN from card.\n",
 990                                    CARD_BUS_ID(card));
 991                         card->lan_online = 0;
 992                 }
 993                 return rc;
 994         } else
 995                 card->lan_online = 1;
 996
 997         if (card->info.type != QETH_CARD_TYPE_OSN) {
 998                 qeth_set_large_send(card, card->options.large_send);
 999                 qeth_l2_process_vlans(card, 0);
1000         }
1001
1002         netif_tx_disable(card->dev);
1003
1004         rc = qeth_init_qdio_queues(card);
1005         if (rc) {
1006                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1007                 goto out_remove;
1008         }
1009         card->state = CARD_STATE_SOFTSETUP;
1010         netif_carrier_on(card->dev);
1011
1012         qeth_set_allowed_threads(card, 0xffffffff, 0);
1013         if (recover_flag == CARD_STATE_RECOVER) {
1014                 if (recovery_mode &&
1015                     card->info.type != QETH_CARD_TYPE_OSN) {
1016                         qeth_l2_open(card->dev);
1017                 } else {
1018                         rtnl_lock();
1019                         dev_open(card->dev);
1020                         rtnl_unlock();
1021                 }
1022                 /* this also sets saved unicast addresses */
1023                 qeth_l2_set_multicast_list(card->dev);
1024         }
1025         /* let user_space know that device is online */
1026         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1027         return 0;
1028 out_remove:
1029         card->use_hard_stop = 1;
1030         qeth_l2_stop_card(card, 0);
1031         ccw_device_set_offline(CARD_DDEV(card));
1032         ccw_device_set_offline(CARD_WDEV(card));
1033         ccw_device_set_offline(CARD_RDEV(card));
1034         if (recover_flag == CARD_STATE_RECOVER)
1035                 card->state = CARD_STATE_RECOVER;
1036         else
1037                 card->state = CARD_STATE_DOWN;
1038         return -ENODEV;
1039 }
1040
1041 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1042 {
1043         return __qeth_l2_set_online(gdev, 0);
1044 }
1045
1046 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1047                                         int recovery_mode)
1048 {
1049         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1050         int rc = 0, rc2 = 0, rc3 = 0;
1051         enum qeth_card_states recover_flag;
1052
1053         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1054         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1055
1056         if (card->dev && netif_carrier_ok(card->dev))
1057                 netif_carrier_off(card->dev);
1058         recover_flag = card->state;
1059         if (qeth_l2_stop_card(card, recovery_mode) == -ERESTARTSYS) {
1060                 PRINT_WARN("Stopping card %s interrupted by user!\n",
1061                            CARD_BUS_ID(card));
1062                 return -ERESTARTSYS;
1063         }
1064         rc  = ccw_device_set_offline(CARD_DDEV(card));
1065         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1066         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1067         if (!rc)
1068                 rc = (rc2) ? rc2 : rc3;
1069         if (rc)
1070                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1071         if (recover_flag == CARD_STATE_UP)
1072                 card->state = CARD_STATE_RECOVER;
1073         /* let user_space know that device is offline */
1074         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1075         return 0;
1076 }
1077
1078 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1079 {
1080         return __qeth_l2_set_offline(cgdev, 0);
1081 }
1082
1083 static int qeth_l2_recover(void *ptr)
1084 {
1085         struct qeth_card *card;
1086         int rc = 0;
1087
1088         card = (struct qeth_card *) ptr;
1089         QETH_DBF_TEXT(TRACE, 2, "recover1");
1090         QETH_DBF_HEX(TRACE, 2, &card, sizeof(void *));
1091         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1092                 return 0;
1093         QETH_DBF_TEXT(TRACE, 2, "recover2");
1094         PRINT_WARN("Recovery of device %s started ...\n",
1095                    CARD_BUS_ID(card));
1096         card->use_hard_stop = 1;
1097         __qeth_l2_set_offline(card->gdev, 1);
1098         rc = __qeth_l2_set_online(card->gdev, 1);
1099         /* don't run another scheduled recovery */
1100         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1101         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1102         if (!rc)
1103                 PRINT_INFO("Device %s successfully recovered!\n",
1104                            CARD_BUS_ID(card));
1105         else
1106                 PRINT_INFO("Device %s could not be recovered!\n",
1107                            CARD_BUS_ID(card));
1108         return 0;
1109 }
1110
1111 static int __init qeth_l2_init(void)
1112 {
1113         PRINT_INFO("register layer 2 discipline\n");
1114         return 0;
1115 }
1116
1117 static void __exit qeth_l2_exit(void)
1118 {
1119         PRINT_INFO("unregister layer 2 discipline\n");
1120 }
1121
1122 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1123 {
1124         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1125         qeth_qdio_clear_card(card, 0);
1126         qeth_clear_qdio_buffers(card);
1127 }
1128
1129 struct ccwgroup_driver qeth_l2_ccwgroup_driver = {
1130         .probe = qeth_l2_probe_device,
1131         .remove = qeth_l2_remove_device,
1132         .set_online = qeth_l2_set_online,
1133         .set_offline = qeth_l2_set_offline,
1134         .shutdown = qeth_l2_shutdown,
1135 };
1136 EXPORT_SYMBOL_GPL(qeth_l2_ccwgroup_driver);
1137
1138 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1139                            struct qeth_cmd_buffer *iob)
1140 {
1141         unsigned long flags;
1142         int rc = 0;
1143
1144         QETH_DBF_TEXT(TRACE, 5, "osndctrd");
1145
1146         wait_event(card->wait_q,
1147                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1148         qeth_prepare_control_data(card, len, iob);
1149         QETH_DBF_TEXT(TRACE, 6, "osnoirqp");
1150         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1151         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1152                               (addr_t) iob, 0, 0);
1153         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1154         if (rc) {
1155                 PRINT_WARN("qeth_osn_send_control_data: "
1156                            "ccw_device_start rc = %i\n", rc);
1157                 QETH_DBF_TEXT_(TRACE, 2, " err%d", rc);
1158                 qeth_release_buffer(iob->channel, iob);
1159                 atomic_set(&card->write.irq_pending, 0);
1160                 wake_up(&card->wait_q);
1161         }
1162         return rc;
1163 }
1164
1165 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1166                         struct qeth_cmd_buffer *iob, int data_len)
1167 {
1168         u16 s1, s2;
1169
1170         QETH_DBF_TEXT(TRACE, 4, "osndipa");
1171
1172         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1173         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1174         s2 = (u16)data_len;
1175         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1176         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1177         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1178         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1179         return qeth_osn_send_control_data(card, s1, iob);
1180 }
1181
1182 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1183 {
1184         struct qeth_cmd_buffer *iob;
1185         struct qeth_card *card;
1186         int rc;
1187
1188         QETH_DBF_TEXT(TRACE, 2, "osnsdmc");
1189         if (!dev)
1190                 return -ENODEV;
1191         card = netdev_priv(dev);
1192         if (!card)
1193                 return -ENODEV;
1194         if ((card->state != CARD_STATE_UP) &&
1195             (card->state != CARD_STATE_SOFTSETUP))
1196                 return -ENODEV;
1197         iob = qeth_wait_for_buffer(&card->write);
1198         memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1199         rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1200         return rc;
1201 }
1202 EXPORT_SYMBOL(qeth_osn_assist);
1203
1204 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1205                   int (*assist_cb)(struct net_device *, void *),
1206                   int (*data_cb)(struct sk_buff *))
1207 {
1208         struct qeth_card *card;
1209
1210         QETH_DBF_TEXT(TRACE, 2, "osnreg");
1211         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1212         if (*dev == NULL)
1213                 return -ENODEV;
1214         card = netdev_priv(*dev);
1215         if (!card)
1216                 return -ENODEV;
1217         if ((assist_cb == NULL) || (data_cb == NULL))
1218                 return -EINVAL;
1219         card->osn_info.assist_cb = assist_cb;
1220         card->osn_info.data_cb = data_cb;
1221         return 0;
1222 }
1223 EXPORT_SYMBOL(qeth_osn_register);
1224
1225 void qeth_osn_deregister(struct net_device *dev)
1226 {
1227         struct qeth_card *card;
1228
1229         QETH_DBF_TEXT(TRACE, 2, "osndereg");
1230         if (!dev)
1231                 return;
1232         card = netdev_priv(dev);
1233         if (!card)
1234                 return;
1235         card->osn_info.assist_cb = NULL;
1236         card->osn_info.data_cb = NULL;
1237         return;
1238 }
1239 EXPORT_SYMBOL(qeth_osn_deregister);
1240
1241 module_init(qeth_l2_init);
1242 module_exit(qeth_l2_exit);
1243 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1244 MODULE_DESCRIPTION("qeth layer 2 discipline");
1245 MODULE_LICENSE("GPL");