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 #define KMSG_COMPONENT "qeth"
  12 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  13
  14 #include <linux/module.h>
  15 #include <linux/moduleparam.h>
  16 #include <linux/string.h>
  17 #include <linux/errno.h>
  18 #include <linux/kernel.h>
  19 #include <linux/etherdevice.h>
  20 #include <linux/mii.h>
  21 #include <linux/ip.h>
  22
  23 #include "qeth_core.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 = dev->ml_priv;
  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 ==  IPA_RC_L2_DUP_MAC) {
 134                 QETH_DBF_MESSAGE(2, "Group MAC %pM already existing on %s \n",
 135                           mac, QETH_CARD_IFNAME(card));
 136                 cmd->hdr.return_code = 0;
 137         }
 138         if (cmd->hdr.return_code)
 139                 QETH_DBF_MESSAGE(2, "Could not set group MAC %pM on %s: %x\n",
 140                           mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 141         return 0;
 142 }
 143
 144 static int qeth_l2_send_setgroupmac(struct qeth_card *card, __u8 *mac)
 145 {
 146         QETH_DBF_TEXT(TRACE, 2, "L2Sgmac");
 147         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETGMAC,
 148                                           qeth_l2_send_setgroupmac_cb);
 149 }
 150
 151 static int qeth_l2_send_delgroupmac_cb(struct qeth_card *card,
 152                                 struct qeth_reply *reply,
 153                                 unsigned long data)
 154 {
 155         struct qeth_ipa_cmd *cmd;
 156         __u8 *mac;
 157
 158         QETH_DBF_TEXT(TRACE, 2, "L2Dgmacb");
 159         cmd = (struct qeth_ipa_cmd *) data;
 160         mac = &cmd->data.setdelmac.mac[0];
 161         if (cmd->hdr.return_code)
 162                 QETH_DBF_MESSAGE(2, "Could not delete group MAC %pM on %s: %x\n",
 163                           mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 164         return 0;
 165 }
 166
 167 static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac)
 168 {
 169         QETH_DBF_TEXT(TRACE, 2, "L2Dgmac");
 170         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELGMAC,
 171                                           qeth_l2_send_delgroupmac_cb);
 172 }
 173
 174 static void qeth_l2_add_mc(struct qeth_card *card, __u8 *mac, int vmac)
 175 {
 176         struct qeth_mc_mac *mc;
 177         int rc;
 178
 179         mc = kmalloc(sizeof(struct qeth_mc_mac), GFP_ATOMIC);
 180
 181         if (!mc)
 182                 return;
 183
 184         memcpy(mc->mc_addr, mac, OSA_ADDR_LEN);
 185         mc->mc_addrlen = OSA_ADDR_LEN;
 186         mc->is_vmac = vmac;
 187
 188         if (vmac) {
 189                 rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
 190                                         NULL);
 191         } else {
 192                 rc = qeth_l2_send_setgroupmac(card, mac);
 193         }
 194
 195         if (!rc)
 196                 list_add_tail(&mc->list, &card->mc_list);
 197         else
 198                 kfree(mc);
 199 }
 200
 201 static void qeth_l2_del_all_mc(struct qeth_card *card)
 202 {
 203         struct qeth_mc_mac *mc, *tmp;
 204
 205         spin_lock_bh(&card->mclock);
 206         list_for_each_entry_safe(mc, tmp, &card->mc_list, list) {
 207                 if (mc->is_vmac)
 208                         qeth_l2_send_setdelmac(card, mc->mc_addr,
 209                                         IPA_CMD_DELVMAC, NULL);
 210                 else
 211                         qeth_l2_send_delgroupmac(card, mc->mc_addr);
 212                 list_del(&mc->list);
 213                 kfree(mc);
 214         }
 215         spin_unlock_bh(&card->mclock);
 216 }
 217
 218 static void qeth_l2_get_packet_type(struct qeth_card *card,
 219                         struct qeth_hdr *hdr, struct sk_buff *skb)
 220 {
 221         __u16 hdr_mac;
 222
 223         if (!memcmp(skb->data + QETH_HEADER_SIZE,
 224                     skb->dev->broadcast, 6)) {
 225                 /* broadcast? */
 226                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 227                 return;
 228         }
 229         hdr_mac = *((__u16 *)skb->data);
 230         /* tr multicast? */
 231         switch (card->info.link_type) {
 232         case QETH_LINK_TYPE_HSTR:
 233         case QETH_LINK_TYPE_LANE_TR:
 234                 if ((hdr_mac == QETH_TR_MAC_NC) ||
 235                     (hdr_mac == QETH_TR_MAC_C))
 236                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 237                 else
 238                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 239                 break;
 240                 /* eth or so multicast? */
 241         default:
 242                 if ((hdr_mac == QETH_ETH_MAC_V4) ||
 243                      (hdr_mac == QETH_ETH_MAC_V6))
 244                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 245                 else
 246                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 247         }
 248 }
 249
 250 static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
 251                         struct sk_buff *skb, int ipv, int cast_type)
 252 {
 253         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
 254
 255         memset(hdr, 0, sizeof(struct qeth_hdr));
 256         hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
 257
 258         /* set byte byte 3 to casting flags */
 259         if (cast_type == RTN_MULTICAST)
 260                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 261         else if (cast_type == RTN_BROADCAST)
 262                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 263         else
 264                 qeth_l2_get_packet_type(card, hdr, skb);
 265
 266         hdr->hdr.l2.pkt_length = skb->len-QETH_HEADER_SIZE;
 267         /* VSWITCH relies on the VLAN
 268          * information to be present in
 269          * the QDIO header */
 270         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
 271                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
 272                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
 273         }
 274 }
 275
 276 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
 277                         struct qeth_reply *reply, unsigned long data)
 278 {
 279         struct qeth_ipa_cmd *cmd;
 280
 281         QETH_DBF_TEXT(TRACE, 2, "L2sdvcb");
 282         cmd = (struct qeth_ipa_cmd *) data;
 283         if (cmd->hdr.return_code) {
 284                 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x. "
 285                           "Continuing\n", cmd->data.setdelvlan.vlan_id,
 286                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 287                 QETH_DBF_TEXT_(TRACE, 2, "L2VL%4x", cmd->hdr.command);
 288                 QETH_DBF_TEXT_(TRACE, 2, "L2%s", CARD_BUS_ID(card));
 289                 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
 290         }
 291         return 0;
 292 }
 293
 294 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
 295                                 enum qeth_ipa_cmds ipacmd)
 296 {
 297         struct qeth_ipa_cmd *cmd;
 298         struct qeth_cmd_buffer *iob;
 299
 300         QETH_DBF_TEXT_(TRACE, 4, "L2sdv%x", ipacmd);
 301         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 302         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 303         cmd->data.setdelvlan.vlan_id = i;
 304         return qeth_send_ipa_cmd(card, iob,
 305                                  qeth_l2_send_setdelvlan_cb, NULL);
 306 }
 307
 308 static void qeth_l2_process_vlans(struct qeth_card *card, int clear)
 309 {
 310         struct qeth_vlan_vid *id;
 311         QETH_DBF_TEXT(TRACE, 3, "L2prcvln");
 312         spin_lock_bh(&card->vlanlock);
 313         list_for_each_entry(id, &card->vid_list, list) {
 314                 if (clear)
 315                         qeth_l2_send_setdelvlan(card, id->vid,
 316                                 IPA_CMD_DELVLAN);
 317                 else
 318                         qeth_l2_send_setdelvlan(card, id->vid,
 319                                 IPA_CMD_SETVLAN);
 320         }
 321         spin_unlock_bh(&card->vlanlock);
 322 }
 323
 324 static void qeth_l2_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
 325 {
 326         struct qeth_card *card = dev->ml_priv;
 327         struct qeth_vlan_vid *id;
 328
 329         QETH_DBF_TEXT_(TRACE, 4, "aid:%d", vid);
 330         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 331                 QETH_DBF_TEXT(TRACE, 3, "aidREC");
 332                 return;
 333         }
 334         id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
 335         if (id) {
 336                 id->vid = vid;
 337                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
 338                 spin_lock_bh(&card->vlanlock);
 339                 list_add_tail(&id->list, &card->vid_list);
 340                 spin_unlock_bh(&card->vlanlock);
 341         }
 342 }
 343
 344 static void qeth_l2_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
 345 {
 346         struct qeth_vlan_vid *id, *tmpid = NULL;
 347         struct qeth_card *card = dev->ml_priv;
 348
 349         QETH_DBF_TEXT_(TRACE, 4, "kid:%d", vid);
 350         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 351                 QETH_DBF_TEXT(TRACE, 3, "kidREC");
 352                 return;
 353         }
 354         spin_lock_bh(&card->vlanlock);
 355         list_for_each_entry(id, &card->vid_list, list) {
 356                 if (id->vid == vid) {
 357                         list_del(&id->list);
 358                         tmpid = id;
 359                         break;
 360                 }
 361         }
 362         spin_unlock_bh(&card->vlanlock);
 363         if (tmpid) {
 364                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 365                 kfree(tmpid);
 366         }
 367         qeth_l2_set_multicast_list(card->dev);
 368 }
 369
 370 static int qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
 371 {
 372         int rc = 0;
 373
 374         QETH_DBF_TEXT(SETUP , 2, "stopcard");
 375         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 376
 377         qeth_set_allowed_threads(card, 0, 1);
 378         if (card->read.state == CH_STATE_UP &&
 379             card->write.state == CH_STATE_UP &&
 380             (card->state == CARD_STATE_UP)) {
 381                 if (recovery_mode &&
 382                     card->info.type != QETH_CARD_TYPE_OSN) {
 383                         qeth_l2_stop(card->dev);
 384                 } else {
 385                         rtnl_lock();
 386                         dev_close(card->dev);
 387                         rtnl_unlock();
 388                 }
 389                 if (!card->use_hard_stop ||
 390                         recovery_mode) {
 391                         __u8 *mac = &card->dev->dev_addr[0];
 392                         rc = qeth_l2_send_delmac(card, mac);
 393                         QETH_DBF_TEXT_(SETUP, 2, "Lerr%d", rc);
 394                 }
 395                 card->state = CARD_STATE_SOFTSETUP;
 396         }
 397         if (card->state == CARD_STATE_SOFTSETUP) {
 398                 qeth_l2_process_vlans(card, 1);
 399                 if (!card->use_hard_stop ||
 400                         recovery_mode)
 401                         qeth_l2_del_all_mc(card);
 402                 qeth_clear_ipacmd_list(card);
 403                 card->state = CARD_STATE_HARDSETUP;
 404         }
 405         if (card->state == CARD_STATE_HARDSETUP) {
 406                 qeth_qdio_clear_card(card, 0);
 407                 qeth_clear_qdio_buffers(card);
 408                 qeth_clear_working_pool_list(card);
 409                 card->state = CARD_STATE_DOWN;
 410         }
 411         if (card->state == CARD_STATE_DOWN) {
 412                 qeth_clear_cmd_buffers(&card->read);
 413                 qeth_clear_cmd_buffers(&card->write);
 414         }
 415         card->use_hard_stop = 0;
 416         return rc;
 417 }
 418
 419 static void qeth_l2_process_inbound_buffer(struct qeth_card *card,
 420                             struct qeth_qdio_buffer *buf, int index)
 421 {
 422         struct qdio_buffer_element *element;
 423         struct sk_buff *skb;
 424         struct qeth_hdr *hdr;
 425         int offset;
 426         unsigned int len;
 427
 428         /* get first element of current buffer */
 429         element = (struct qdio_buffer_element *)&buf->buffer->element[0];
 430         offset = 0;
 431         if (card->options.performance_stats)
 432                 card->perf_stats.bufs_rec++;
 433         while ((skb = qeth_core_get_next_skb(card, buf->buffer, &element,
 434                                        &offset, &hdr))) {
 435                 skb->dev = card->dev;
 436                 /* is device UP ? */
 437                 if (!(card->dev->flags & IFF_UP)) {
 438                         dev_kfree_skb_any(skb);
 439                         continue;
 440                 }
 441
 442                 switch (hdr->hdr.l2.id) {
 443                 case QETH_HEADER_TYPE_LAYER2:
 444                         skb->pkt_type = PACKET_HOST;
 445                         skb->protocol = eth_type_trans(skb, skb->dev);
 446                         if (card->options.checksum_type == NO_CHECKSUMMING)
 447                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 448                         else
 449                                 skb->ip_summed = CHECKSUM_NONE;
 450                         if (skb->protocol == htons(ETH_P_802_2))
 451                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
 452                         len = skb->len;
 453                         netif_rx(skb);
 454                         break;
 455                 case QETH_HEADER_TYPE_OSN:
 456                         if (card->info.type == QETH_CARD_TYPE_OSN) {
 457                                 skb_push(skb, sizeof(struct qeth_hdr));
 458                                 skb_copy_to_linear_data(skb, hdr,
 459                                                 sizeof(struct qeth_hdr));
 460                                 len = skb->len;
 461                                 card->osn_info.data_cb(skb);
 462                                 break;
 463                         }
 464                         /* else unknown */
 465                 default:
 466                         dev_kfree_skb_any(skb);
 467                         QETH_DBF_TEXT(TRACE, 3, "inbunkno");
 468                         QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
 469                         continue;
 470                 }
 471                 card->dev->last_rx = jiffies;
 472                 card->stats.rx_packets++;
 473                 card->stats.rx_bytes += len;
 474         }
 475 }
 476
 477 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
 478                            enum qeth_ipa_cmds ipacmd,
 479                            int (*reply_cb) (struct qeth_card *,
 480                                             struct qeth_reply*,
 481                                             unsigned long))
 482 {
 483         struct qeth_ipa_cmd *cmd;
 484         struct qeth_cmd_buffer *iob;
 485
 486         QETH_DBF_TEXT(TRACE, 2, "L2sdmac");
 487         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 488         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 489         cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
 490         memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
 491         return qeth_send_ipa_cmd(card, iob, reply_cb, NULL);
 492 }
 493
 494 static int qeth_l2_send_setmac_cb(struct qeth_card *card,
 495                            struct qeth_reply *reply,
 496                            unsigned long data)
 497 {
 498         struct qeth_ipa_cmd *cmd;
 499
 500         QETH_DBF_TEXT(TRACE, 2, "L2Smaccb");
 501         cmd = (struct qeth_ipa_cmd *) data;
 502         if (cmd->hdr.return_code) {
 503                 QETH_DBF_TEXT_(TRACE, 2, "L2er%x", cmd->hdr.return_code);
 504                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 505                 switch (cmd->hdr.return_code) {
 506                 case IPA_RC_L2_DUP_MAC:
 507                 case IPA_RC_L2_DUP_LAYER3_MAC:
 508                         dev_warn(&card->gdev->dev,
 509                                 "MAC address "
 510                                 "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x "
 511                                 "already exists\n",
 512                                 card->dev->dev_addr[0], card->dev->dev_addr[1],
 513                                 card->dev->dev_addr[2], card->dev->dev_addr[3],
 514                                 card->dev->dev_addr[4], card->dev->dev_addr[5]);
 515                         break;
 516                 case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
 517                 case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
 518                         dev_warn(&card->gdev->dev,
 519                                 "MAC address "
 520                                 "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x "
 521                                 "is not authorized\n",
 522                                 card->dev->dev_addr[0], card->dev->dev_addr[1],
 523                                 card->dev->dev_addr[2], card->dev->dev_addr[3],
 524                                 card->dev->dev_addr[4], card->dev->dev_addr[5]);
 525                         break;
 526                 default:
 527                         break;
 528                 }
 529                 cmd->hdr.return_code = -EIO;
 530         } else {
 531                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 532                 memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
 533                        OSA_ADDR_LEN);
 534                 dev_info(&card->gdev->dev,
 535                         "MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x "
 536                         "successfully registered on device %s\n",
 537                         card->dev->dev_addr[0], card->dev->dev_addr[1],
 538                         card->dev->dev_addr[2], card->dev->dev_addr[3],
 539                         card->dev->dev_addr[4], card->dev->dev_addr[5],
 540                         card->dev->name);
 541         }
 542         return 0;
 543 }
 544
 545 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
 546 {
 547         QETH_DBF_TEXT(TRACE, 2, "L2Setmac");
 548         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
 549                                           qeth_l2_send_setmac_cb);
 550 }
 551
 552 static int qeth_l2_send_delmac_cb(struct qeth_card *card,
 553                            struct qeth_reply *reply,
 554                            unsigned long data)
 555 {
 556         struct qeth_ipa_cmd *cmd;
 557
 558         QETH_DBF_TEXT(TRACE, 2, "L2Dmaccb");
 559         cmd = (struct qeth_ipa_cmd *) data;
 560         if (cmd->hdr.return_code) {
 561                 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
 562                 cmd->hdr.return_code = -EIO;
 563                 return 0;
 564         }
 565         card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 566
 567         return 0;
 568 }
 569
 570 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
 571 {
 572         QETH_DBF_TEXT(TRACE, 2, "L2Delmac");
 573         if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
 574                 return 0;
 575         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
 576                                           qeth_l2_send_delmac_cb);
 577 }
 578
 579 static int qeth_l2_request_initial_mac(struct qeth_card *card)
 580 {
 581         int rc = 0;
 582         char vendor_pre[] = {0x02, 0x00, 0x00};
 583
 584         QETH_DBF_TEXT(SETUP, 2, "doL2init");
 585         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
 586
 587         rc = qeth_query_setadapterparms(card);
 588         if (rc) {
 589                 QETH_DBF_MESSAGE(2, "could not query adapter parameters on "
 590                         "device %s: x%x\n", CARD_BUS_ID(card), rc);
 591         }
 592
 593         if ((card->info.type == QETH_CARD_TYPE_IQD) ||
 594             (card->info.guestlan)) {
 595                 rc = qeth_setadpparms_change_macaddr(card);
 596                 if (rc) {
 597                         QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
 598                                 "device %s: x%x\n", CARD_BUS_ID(card), rc);
 599                         QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 600                         return rc;
 601                 }
 602                 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN);
 603         } else {
 604                 random_ether_addr(card->dev->dev_addr);
 605                 memcpy(card->dev->dev_addr, vendor_pre, 3);
 606         }
 607         return 0;
 608 }
 609
 610 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 611 {
 612         struct sockaddr *addr = p;
 613         struct qeth_card *card = dev->ml_priv;
 614         int rc = 0;
 615
 616         QETH_DBF_TEXT(TRACE, 3, "setmac");
 617
 618         if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
 619                 QETH_DBF_TEXT(TRACE, 3, "setmcINV");
 620                 return -EOPNOTSUPP;
 621         }
 622
 623         if (card->info.type == QETH_CARD_TYPE_OSN) {
 624                 QETH_DBF_TEXT(TRACE, 3, "setmcOSN");
 625                 return -EOPNOTSUPP;
 626         }
 627         QETH_DBF_TEXT_(TRACE, 3, "%s", CARD_BUS_ID(card));
 628         QETH_DBF_HEX(TRACE, 3, addr->sa_data, OSA_ADDR_LEN);
 629         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 630                 QETH_DBF_TEXT(TRACE, 3, "setmcREC");
 631                 return -ERESTARTSYS;
 632         }
 633         rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
 634         if (!rc)
 635                 rc = qeth_l2_send_setmac(card, addr->sa_data);
 636         return rc;
 637 }
 638
 639 static void qeth_l2_set_multicast_list(struct net_device *dev)
 640 {
 641         struct qeth_card *card = dev->ml_priv;
 642         struct dev_addr_list *dm;
 643
 644         if (card->info.type == QETH_CARD_TYPE_OSN)
 645                 return ;
 646
 647         QETH_DBF_TEXT(TRACE, 3, "setmulti");
 648         if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
 649             (card->state != CARD_STATE_UP))
 650                 return;
 651         qeth_l2_del_all_mc(card);
 652         spin_lock_bh(&card->mclock);
 653         for (dm = dev->mc_list; dm; dm = dm->next)
 654                 qeth_l2_add_mc(card, dm->da_addr, 0);
 655
 656         for (dm = dev->uc_list; dm; dm = dm->next)
 657                 qeth_l2_add_mc(card, dm->da_addr, 1);
 658
 659         spin_unlock_bh(&card->mclock);
 660         if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
 661                 return;
 662         qeth_setadp_promisc_mode(card);
 663 }
 664
 665 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 666 {
 667         int rc;
 668         struct qeth_hdr *hdr = NULL;
 669         int elements = 0;
 670         struct qeth_card *card = dev->ml_priv;
 671         struct sk_buff *new_skb = skb;
 672         int ipv = qeth_get_ip_version(skb);
 673         int cast_type = qeth_get_cast_type(card, skb);
 674         struct qeth_qdio_out_q *queue = card->qdio.out_qs
 675                 [qeth_get_priority_queue(card, skb, ipv, cast_type)];
 676         int tx_bytes = skb->len;
 677         int data_offset = -1;
 678         int elements_needed = 0;
 679         int hd_len = 0;
 680
 681         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
 682                 card->stats.tx_carrier_errors++;
 683                 goto tx_drop;
 684         }
 685
 686         if ((card->info.type == QETH_CARD_TYPE_OSN) &&
 687             (skb->protocol == htons(ETH_P_IPV6)))
 688                 goto tx_drop;
 689
 690         if (card->options.performance_stats) {
 691                 card->perf_stats.outbound_cnt++;
 692                 card->perf_stats.outbound_start_time = qeth_get_micros();
 693         }
 694         netif_stop_queue(dev);
 695
 696         if (card->info.type == QETH_CARD_TYPE_OSN)
 697                 hdr = (struct qeth_hdr *)skb->data;
 698         else {
 699                 if (card->info.type == QETH_CARD_TYPE_IQD) {
 700                         new_skb = skb;
 701                         data_offset = ETH_HLEN;
 702                         hd_len = ETH_HLEN;
 703                         hdr = kmem_cache_alloc(qeth_core_header_cache,
 704                                                 GFP_ATOMIC);
 705                         if (!hdr)
 706                                 goto tx_drop;
 707                         elements_needed++;
 708                         skb_reset_mac_header(new_skb);
 709                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 710                         hdr->hdr.l2.pkt_length = new_skb->len;
 711                         memcpy(((char *)hdr) + sizeof(struct qeth_hdr),
 712                                 skb_mac_header(new_skb), ETH_HLEN);
 713                 } else {
 714                         /* create a clone with writeable headroom */
 715                         new_skb = skb_realloc_headroom(skb,
 716                                                 sizeof(struct qeth_hdr));
 717                         if (!new_skb)
 718                                 goto tx_drop;
 719                         hdr = (struct qeth_hdr *)skb_push(new_skb,
 720                                                 sizeof(struct qeth_hdr));
 721                         skb_set_mac_header(new_skb, sizeof(struct qeth_hdr));
 722                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 723                 }
 724         }
 725
 726         elements = qeth_get_elements_no(card, (void *)hdr, new_skb,
 727                                                 elements_needed);
 728         if (!elements) {
 729                 if (data_offset >= 0)
 730                         kmem_cache_free(qeth_core_header_cache, hdr);
 731                 goto tx_drop;
 732         }
 733
 734         if (card->info.type != QETH_CARD_TYPE_IQD)
 735                 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
 736                                          elements);
 737         else
 738                 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
 739                                         elements, data_offset, hd_len);
 740         if (!rc) {
 741                 card->stats.tx_packets++;
 742                 card->stats.tx_bytes += tx_bytes;
 743                 if (new_skb != skb)
 744                         dev_kfree_skb_any(skb);
 745         } else {
 746                 if (data_offset >= 0)
 747                         kmem_cache_free(qeth_core_header_cache, hdr);
 748
 749                 if (rc == -EBUSY) {
 750                         if (new_skb != skb)
 751                                 dev_kfree_skb_any(new_skb);
 752                         return NETDEV_TX_BUSY;
 753                 } else
 754                         goto tx_drop;
 755         }
 756
 757         netif_wake_queue(dev);
 758         if (card->options.performance_stats)
 759                 card->perf_stats.outbound_time += qeth_get_micros() -
 760                         card->perf_stats.outbound_start_time;
 761         return rc;
 762
 763 tx_drop:
 764         card->stats.tx_dropped++;
 765         card->stats.tx_errors++;
 766         if ((new_skb != skb) && new_skb)
 767                 dev_kfree_skb_any(new_skb);
 768         dev_kfree_skb_any(skb);
 769         netif_wake_queue(dev);
 770         return NETDEV_TX_OK;
 771 }
 772
 773 static void qeth_l2_qdio_input_handler(struct ccw_device *ccwdev,
 774                         unsigned int qdio_err, unsigned int queue,
 775                         int first_element, int count, unsigned long card_ptr)
 776 {
 777         struct net_device *net_dev;
 778         struct qeth_card *card;
 779         struct qeth_qdio_buffer *buffer;
 780         int index;
 781         int i;
 782
 783         card = (struct qeth_card *) card_ptr;
 784         net_dev = card->dev;
 785         if (card->options.performance_stats) {
 786                 card->perf_stats.inbound_cnt++;
 787                 card->perf_stats.inbound_start_time = qeth_get_micros();
 788         }
 789         if (qdio_err & QDIO_ERROR_ACTIVATE_CHECK_CONDITION) {
 790                 QETH_DBF_TEXT(TRACE, 1, "qdinchk");
 791                 QETH_DBF_TEXT_(TRACE, 1, "%s", CARD_BUS_ID(card));
 792                 QETH_DBF_TEXT_(TRACE, 1, "%04X%04X", first_element,
 793                                 count);
 794                 QETH_DBF_TEXT_(TRACE, 1, "%04X", queue);
 795                 qeth_schedule_recovery(card);
 796                 return;
 797         }
 798         for (i = first_element; i < (first_element + count); ++i) {
 799                 index = i % QDIO_MAX_BUFFERS_PER_Q;
 800                 buffer = &card->qdio.in_q->bufs[index];
 801                 if (!(qdio_err &&
 802                       qeth_check_qdio_errors(buffer->buffer, qdio_err, "qinerr")))
 803                         qeth_l2_process_inbound_buffer(card, buffer, index);
 804                 /* clear buffer and give back to hardware */
 805                 qeth_put_buffer_pool_entry(card, buffer->pool_entry);
 806                 qeth_queue_input_buffer(card, index);
 807         }
 808         if (card->options.performance_stats)
 809                 card->perf_stats.inbound_time += qeth_get_micros() -
 810                         card->perf_stats.inbound_start_time;
 811 }
 812
 813 static int qeth_l2_open(struct net_device *dev)
 814 {
 815         struct qeth_card *card = dev->ml_priv;
 816
 817         QETH_DBF_TEXT(TRACE, 4, "qethopen");
 818         if (card->state != CARD_STATE_SOFTSETUP)
 819                 return -ENODEV;
 820
 821         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
 822              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
 823                 QETH_DBF_TEXT(TRACE, 4, "nomacadr");
 824                 return -EPERM;
 825         }
 826         card->data.state = CH_STATE_UP;
 827         card->state = CARD_STATE_UP;
 828         netif_start_queue(dev);
 829
 830         if (!card->lan_online && netif_carrier_ok(dev))
 831                 netif_carrier_off(dev);
 832         return 0;
 833 }
 834
 835
 836 static int qeth_l2_stop(struct net_device *dev)
 837 {
 838         struct qeth_card *card = dev->ml_priv;
 839
 840         QETH_DBF_TEXT(TRACE, 4, "qethstop");
 841         netif_tx_disable(dev);
 842         if (card->state == CARD_STATE_UP)
 843                 card->state = CARD_STATE_SOFTSETUP;
 844         return 0;
 845 }
 846
 847 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 848 {
 849         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 850
 851         INIT_LIST_HEAD(&card->vid_list);
 852         INIT_LIST_HEAD(&card->mc_list);
 853         card->options.layer2 = 1;
 854         card->discipline.input_handler = (qdio_handler_t *)
 855                 qeth_l2_qdio_input_handler;
 856         card->discipline.output_handler = (qdio_handler_t *)
 857                 qeth_qdio_output_handler;
 858         card->discipline.recover = qeth_l2_recover;
 859         return 0;
 860 }
 861
 862 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
 863 {
 864         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
 865
 866         qeth_set_allowed_threads(card, 0, 1);
 867         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 868
 869         if (cgdev->state == CCWGROUP_ONLINE) {
 870                 card->use_hard_stop = 1;
 871                 qeth_l2_set_offline(cgdev);
 872         }
 873
 874         if (card->dev) {
 875                 unregister_netdev(card->dev);
 876                 card->dev = NULL;
 877         }
 878
 879         qeth_l2_del_all_mc(card);
 880         return;
 881 }
 882
 883 static struct ethtool_ops qeth_l2_ethtool_ops = {
 884         .get_link = ethtool_op_get_link,
 885         .get_strings = qeth_core_get_strings,
 886         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 887         .get_stats_count = qeth_core_get_stats_count,
 888         .get_drvinfo = qeth_core_get_drvinfo,
 889         .get_settings = qeth_core_ethtool_get_settings,
 890 };
 891
 892 static struct ethtool_ops qeth_l2_osn_ops = {
 893         .get_strings = qeth_core_get_strings,
 894         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 895         .get_stats_count = qeth_core_get_stats_count,
 896         .get_drvinfo = qeth_core_get_drvinfo,
 897 };
 898
 899 static const struct net_device_ops qeth_l2_netdev_ops = {
 900         .ndo_open               = qeth_l2_open,
 901         .ndo_stop               = qeth_l2_stop,
 902         .ndo_get_stats          = qeth_get_stats,
 903         .ndo_start_xmit         = qeth_l2_hard_start_xmit,
 904         .ndo_validate_addr      = eth_validate_addr,
 905         .ndo_set_multicast_list = qeth_l2_set_multicast_list,
 906         .ndo_do_ioctl           = qeth_l2_do_ioctl,
 907         .ndo_set_mac_address    = qeth_l2_set_mac_address,
 908         .ndo_change_mtu         = qeth_change_mtu,
 909         .ndo_vlan_rx_add_vid    = qeth_l2_vlan_rx_add_vid,
 910         .ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,
 911         .ndo_tx_timeout         = qeth_tx_timeout,
 912 };
 913
 914 static int qeth_l2_setup_netdev(struct qeth_card *card)
 915 {
 916         switch (card->info.type) {
 917         case QETH_CARD_TYPE_OSAE:
 918                 card->dev = alloc_etherdev(0);
 919                 break;
 920         case QETH_CARD_TYPE_IQD:
 921                 card->dev = alloc_netdev(0, "hsi%d", ether_setup);
 922                 break;
 923         case QETH_CARD_TYPE_OSN:
 924                 card->dev = alloc_netdev(0, "osn%d", ether_setup);
 925                 card->dev->flags |= IFF_NOARP;
 926                 break;
 927         default:
 928                 card->dev = alloc_etherdev(0);
 929         }
 930
 931         if (!card->dev)
 932                 return -ENODEV;
 933
 934         card->dev->ml_priv = card;
 935         card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
 936         card->dev->mtu = card->info.initial_mtu;
 937         card->dev->netdev_ops = &qeth_l2_netdev_ops;
 938         if (card->info.type != QETH_CARD_TYPE_OSN)
 939                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops);
 940         else
 941                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops);
 942         card->dev->features |= NETIF_F_HW_VLAN_FILTER;
 943         card->info.broadcast_capable = 1;
 944         qeth_l2_request_initial_mac(card);
 945         SET_NETDEV_DEV(card->dev, &card->gdev->dev);
 946         return register_netdev(card->dev);
 947 }
 948
 949 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 950 {
 951         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 952         int rc = 0;
 953         enum qeth_card_states recover_flag;
 954
 955         BUG_ON(!card);
 956         QETH_DBF_TEXT(SETUP, 2, "setonlin");
 957         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 958
 959         qeth_set_allowed_threads(card, QETH_RECOVER_THREAD, 1);
 960         recover_flag = card->state;
 961         rc = ccw_device_set_online(CARD_RDEV(card));
 962         if (rc) {
 963                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 964                 return -EIO;
 965         }
 966         rc = ccw_device_set_online(CARD_WDEV(card));
 967         if (rc) {
 968                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 969                 return -EIO;
 970         }
 971         rc = ccw_device_set_online(CARD_DDEV(card));
 972         if (rc) {
 973                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 974                 return -EIO;
 975         }
 976
 977         rc = qeth_core_hardsetup_card(card);
 978         if (rc) {
 979                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
 980                 goto out_remove;
 981         }
 982
 983         if (!card->dev && qeth_l2_setup_netdev(card))
 984                 goto out_remove;
 985
 986         if (card->info.type != QETH_CARD_TYPE_OSN)
 987                 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
 988
 989         card->state = CARD_STATE_HARDSETUP;
 990         qeth_print_status_message(card);
 991
 992         /* softsetup */
 993         QETH_DBF_TEXT(SETUP, 2, "softsetp");
 994
 995         rc = qeth_send_startlan(card);
 996         if (rc) {
 997                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 998                 if (rc == 0xe080) {
 999                         dev_warn(&card->gdev->dev,
1000                                 "The LAN is offline\n");
1001                         card->lan_online = 0;
1002                         return 0;
1003                 }
1004                 goto out_remove;
1005         } else
1006                 card->lan_online = 1;
1007
1008         if (card->info.type != QETH_CARD_TYPE_OSN) {
1009                 qeth_set_large_send(card, card->options.large_send);
1010                 qeth_l2_process_vlans(card, 0);
1011         }
1012
1013         netif_tx_disable(card->dev);
1014
1015         rc = qeth_init_qdio_queues(card);
1016         if (rc) {
1017                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1018                 goto out_remove;
1019         }
1020         card->state = CARD_STATE_SOFTSETUP;
1021         netif_carrier_on(card->dev);
1022
1023         qeth_set_allowed_threads(card, 0xffffffff, 0);
1024         if (recover_flag == CARD_STATE_RECOVER) {
1025                 if (recovery_mode &&
1026                     card->info.type != QETH_CARD_TYPE_OSN) {
1027                         qeth_l2_open(card->dev);
1028                 } else {
1029                         rtnl_lock();
1030                         dev_open(card->dev);
1031                         rtnl_unlock();
1032                 }
1033                 /* this also sets saved unicast addresses */
1034                 qeth_l2_set_multicast_list(card->dev);
1035         }
1036         /* let user_space know that device is online */
1037         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1038         return 0;
1039 out_remove:
1040         card->use_hard_stop = 1;
1041         qeth_l2_stop_card(card, 0);
1042         ccw_device_set_offline(CARD_DDEV(card));
1043         ccw_device_set_offline(CARD_WDEV(card));
1044         ccw_device_set_offline(CARD_RDEV(card));
1045         if (recover_flag == CARD_STATE_RECOVER)
1046                 card->state = CARD_STATE_RECOVER;
1047         else
1048                 card->state = CARD_STATE_DOWN;
1049         return -ENODEV;
1050 }
1051
1052 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1053 {
1054         return __qeth_l2_set_online(gdev, 0);
1055 }
1056
1057 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1058                                         int recovery_mode)
1059 {
1060         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1061         int rc = 0, rc2 = 0, rc3 = 0;
1062         enum qeth_card_states recover_flag;
1063
1064         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1065         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1066
1067         if (card->dev && netif_carrier_ok(card->dev))
1068                 netif_carrier_off(card->dev);
1069         recover_flag = card->state;
1070         qeth_l2_stop_card(card, recovery_mode);
1071         rc  = ccw_device_set_offline(CARD_DDEV(card));
1072         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1073         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1074         if (!rc)
1075                 rc = (rc2) ? rc2 : rc3;
1076         if (rc)
1077                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1078         if (recover_flag == CARD_STATE_UP)
1079                 card->state = CARD_STATE_RECOVER;
1080         /* let user_space know that device is offline */
1081         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1082         return 0;
1083 }
1084
1085 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1086 {
1087         return __qeth_l2_set_offline(cgdev, 0);
1088 }
1089
1090 static int qeth_l2_recover(void *ptr)
1091 {
1092         struct qeth_card *card;
1093         int rc = 0;
1094
1095         card = (struct qeth_card *) ptr;
1096         QETH_DBF_TEXT(TRACE, 2, "recover1");
1097         QETH_DBF_HEX(TRACE, 2, &card, sizeof(void *));
1098         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1099                 return 0;
1100         QETH_DBF_TEXT(TRACE, 2, "recover2");
1101         dev_warn(&card->gdev->dev,
1102                 "A recovery process has been started for the device\n");
1103         card->use_hard_stop = 1;
1104         __qeth_l2_set_offline(card->gdev, 1);
1105         rc = __qeth_l2_set_online(card->gdev, 1);
1106         /* don't run another scheduled recovery */
1107         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1108         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1109         if (!rc)
1110                 dev_info(&card->gdev->dev,
1111                         "Device successfully recovered!\n");
1112         else {
1113                 if (card->dev) {
1114                         rtnl_lock();
1115                         dev_close(card->dev);
1116                         rtnl_unlock();
1117                 }
1118                 dev_warn(&card->gdev->dev, "The qeth device driver "
1119                         "failed to recover an error on the device\n");
1120         }
1121         return 0;
1122 }
1123
1124 static int __init qeth_l2_init(void)
1125 {
1126         pr_info("register layer 2 discipline\n");
1127         return 0;
1128 }
1129
1130 static void __exit qeth_l2_exit(void)
1131 {
1132         pr_info("unregister layer 2 discipline\n");
1133 }
1134
1135 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1136 {
1137         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1138         qeth_qdio_clear_card(card, 0);
1139         qeth_clear_qdio_buffers(card);
1140 }
1141
1142 struct ccwgroup_driver qeth_l2_ccwgroup_driver = {
1143         .probe = qeth_l2_probe_device,
1144         .remove = qeth_l2_remove_device,
1145         .set_online = qeth_l2_set_online,
1146         .set_offline = qeth_l2_set_offline,
1147         .shutdown = qeth_l2_shutdown,
1148 };
1149 EXPORT_SYMBOL_GPL(qeth_l2_ccwgroup_driver);
1150
1151 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1152                            struct qeth_cmd_buffer *iob)
1153 {
1154         unsigned long flags;
1155         int rc = 0;
1156
1157         QETH_DBF_TEXT(TRACE, 5, "osndctrd");
1158
1159         wait_event(card->wait_q,
1160                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1161         qeth_prepare_control_data(card, len, iob);
1162         QETH_DBF_TEXT(TRACE, 6, "osnoirqp");
1163         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1164         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1165                               (addr_t) iob, 0, 0);
1166         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1167         if (rc) {
1168                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1169                            "ccw_device_start rc = %i\n", rc);
1170                 QETH_DBF_TEXT_(TRACE, 2, " err%d", rc);
1171                 qeth_release_buffer(iob->channel, iob);
1172                 atomic_set(&card->write.irq_pending, 0);
1173                 wake_up(&card->wait_q);
1174         }
1175         return rc;
1176 }
1177
1178 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1179                         struct qeth_cmd_buffer *iob, int data_len)
1180 {
1181         u16 s1, s2;
1182
1183         QETH_DBF_TEXT(TRACE, 4, "osndipa");
1184
1185         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1186         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1187         s2 = (u16)data_len;
1188         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1189         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1190         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1191         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1192         return qeth_osn_send_control_data(card, s1, iob);
1193 }
1194
1195 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1196 {
1197         struct qeth_cmd_buffer *iob;
1198         struct qeth_card *card;
1199         int rc;
1200
1201         QETH_DBF_TEXT(TRACE, 2, "osnsdmc");
1202         if (!dev)
1203                 return -ENODEV;
1204         card = dev->ml_priv;
1205         if (!card)
1206                 return -ENODEV;
1207         if ((card->state != CARD_STATE_UP) &&
1208             (card->state != CARD_STATE_SOFTSETUP))
1209                 return -ENODEV;
1210         iob = qeth_wait_for_buffer(&card->write);
1211         memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1212         rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1213         return rc;
1214 }
1215 EXPORT_SYMBOL(qeth_osn_assist);
1216
1217 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1218                   int (*assist_cb)(struct net_device *, void *),
1219                   int (*data_cb)(struct sk_buff *))
1220 {
1221         struct qeth_card *card;
1222
1223         QETH_DBF_TEXT(TRACE, 2, "osnreg");
1224         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1225         if (*dev == NULL)
1226                 return -ENODEV;
1227         card = (*dev)->ml_priv;
1228         if (!card)
1229                 return -ENODEV;
1230         if ((assist_cb == NULL) || (data_cb == NULL))
1231                 return -EINVAL;
1232         card->osn_info.assist_cb = assist_cb;
1233         card->osn_info.data_cb = data_cb;
1234         return 0;
1235 }
1236 EXPORT_SYMBOL(qeth_osn_register);
1237
1238 void qeth_osn_deregister(struct net_device *dev)
1239 {
1240         struct qeth_card *card;
1241
1242         QETH_DBF_TEXT(TRACE, 2, "osndereg");
1243         if (!dev)
1244                 return;
1245         card = dev->ml_priv;
1246         if (!card)
1247                 return;
1248         card->osn_info.assist_cb = NULL;
1249         card->osn_info.data_cb = NULL;
1250         return;
1251 }
1252 EXPORT_SYMBOL(qeth_osn_deregister);
1253
1254 module_init(qeth_l2_init);
1255 module_exit(qeth_l2_exit);
1256 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1257 MODULE_DESCRIPTION("qeth layer 2 discipline");
1258 MODULE_LICENSE("GPL");