Pileus Git - ~andy/linux/blob - drivers/s390/net/qeth_l2_main.c

   1 /*
   2  *  drivers/s390/net/qeth_l2_main.c
   3  *
   4  *    Copyright IBM Corp. 2007, 2009
   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/slab.h>
  20 #include <linux/etherdevice.h>
  21 #include <linux/mii.h>
  22 #include <linux/ip.h>
  23 #include <linux/list.h>
  24
  25 #include "qeth_core.h"
  26
  27 static int qeth_l2_set_offline(struct ccwgroup_device *);
  28 static int qeth_l2_stop(struct net_device *);
  29 static int qeth_l2_send_delmac(struct qeth_card *, __u8 *);
  30 static int qeth_l2_send_setdelmac(struct qeth_card *, __u8 *,
  31                            enum qeth_ipa_cmds,
  32                            int (*reply_cb) (struct qeth_card *,
  33                                             struct qeth_reply*,
  34                                             unsigned long));
  35 static void qeth_l2_set_multicast_list(struct net_device *);
  36 static int qeth_l2_recover(void *);
  37
  38 static int qeth_l2_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
  39 {
  40         struct qeth_card *card = dev->ml_priv;
  41         struct mii_ioctl_data *mii_data;
  42         int rc = 0;
  43
  44         if (!card)
  45                 return -ENODEV;
  46
  47         if ((card->state != CARD_STATE_UP) &&
  48                 (card->state != CARD_STATE_SOFTSETUP))
  49                 return -ENODEV;
  50
  51         if (card->info.type == QETH_CARD_TYPE_OSN)
  52                 return -EPERM;
  53
  54         switch (cmd) {
  55         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
  56                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
  57                 break;
  58         case SIOC_QETH_GET_CARD_TYPE:
  59                 if ((card->info.type == QETH_CARD_TYPE_OSD ||
  60                      card->info.type == QETH_CARD_TYPE_OSM ||
  61                      card->info.type == QETH_CARD_TYPE_OSX) &&
  62                     !card->info.guestlan)
  63                         return 1;
  64                 return 0;
  65                 break;
  66         case SIOCGMIIPHY:
  67                 mii_data = if_mii(rq);
  68                 mii_data->phy_id = 0;
  69                 break;
  70         case SIOCGMIIREG:
  71                 mii_data = if_mii(rq);
  72                 if (mii_data->phy_id != 0)
  73                         rc = -EINVAL;
  74                 else
  75                         mii_data->val_out = qeth_mdio_read(dev,
  76                                 mii_data->phy_id, mii_data->reg_num);
  77                 break;
  78         default:
  79                 rc = -EOPNOTSUPP;
  80         }
  81         if (rc)
  82                 QETH_CARD_TEXT_(card, 2, "ioce%d", rc);
  83         return rc;
  84 }
  85
  86 static int qeth_l2_verify_dev(struct net_device *dev)
  87 {
  88         struct qeth_card *card;
  89         unsigned long flags;
  90         int rc = 0;
  91
  92         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
  93         list_for_each_entry(card, &qeth_core_card_list.list, list) {
  94                 if (card->dev == dev) {
  95                         rc = QETH_REAL_CARD;
  96                         break;
  97                 }
  98         }
  99         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
 100
 101         return rc;
 102 }
 103
 104 static struct net_device *qeth_l2_netdev_by_devno(unsigned char *read_dev_no)
 105 {
 106         struct qeth_card *card;
 107         struct net_device *ndev;
 108         __u16 temp_dev_no;
 109         unsigned long flags;
 110         struct ccw_dev_id read_devid;
 111
 112         ndev = NULL;
 113         memcpy(&temp_dev_no, read_dev_no, 2);
 114         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
 115         list_for_each_entry(card, &qeth_core_card_list.list, list) {
 116                 ccw_device_get_id(CARD_RDEV(card), &read_devid);
 117                 if (read_devid.devno == temp_dev_no) {
 118                         ndev = card->dev;
 119                         break;
 120                 }
 121         }
 122         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
 123         return ndev;
 124 }
 125
 126 static int qeth_l2_send_setgroupmac_cb(struct qeth_card *card,
 127                                 struct qeth_reply *reply,
 128                                 unsigned long data)
 129 {
 130         struct qeth_ipa_cmd *cmd;
 131         __u8 *mac;
 132
 133         QETH_CARD_TEXT(card, 2, "L2Sgmacb");
 134         cmd = (struct qeth_ipa_cmd *) data;
 135         mac = &cmd->data.setdelmac.mac[0];
 136         /* MAC already registered, needed in couple/uncouple case */
 137         if (cmd->hdr.return_code ==  IPA_RC_L2_DUP_MAC) {
 138                 QETH_DBF_MESSAGE(2, "Group MAC %pM already existing on %s \n",
 139                           mac, QETH_CARD_IFNAME(card));
 140                 cmd->hdr.return_code = 0;
 141         }
 142         if (cmd->hdr.return_code)
 143                 QETH_DBF_MESSAGE(2, "Could not set group MAC %pM on %s: %x\n",
 144                           mac, 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_CARD_TEXT(card, 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_CARD_TEXT(card, 2, "L2Dgmacb");
 163         cmd = (struct qeth_ipa_cmd *) data;
 164         mac = &cmd->data.setdelmac.mac[0];
 165         if (cmd->hdr.return_code)
 166                 QETH_DBF_MESSAGE(2, "Could not delete group MAC %pM on %s: %x\n",
 167                           mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 168         return 0;
 169 }
 170
 171 static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac)
 172 {
 173         QETH_CARD_TEXT(card, 2, "L2Dgmac");
 174         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELGMAC,
 175                                           qeth_l2_send_delgroupmac_cb);
 176 }
 177
 178 static void qeth_l2_add_mc(struct qeth_card *card, __u8 *mac, int vmac)
 179 {
 180         struct qeth_mc_mac *mc;
 181         int rc;
 182
 183         mc = kmalloc(sizeof(struct qeth_mc_mac), GFP_ATOMIC);
 184
 185         if (!mc)
 186                 return;
 187
 188         memcpy(mc->mc_addr, mac, OSA_ADDR_LEN);
 189         mc->mc_addrlen = OSA_ADDR_LEN;
 190         mc->is_vmac = vmac;
 191
 192         if (vmac) {
 193                 rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
 194                                         NULL);
 195         } else {
 196                 rc = qeth_l2_send_setgroupmac(card, mac);
 197         }
 198
 199         if (!rc)
 200                 list_add_tail(&mc->list, &card->mc_list);
 201         else
 202                 kfree(mc);
 203 }
 204
 205 static void qeth_l2_del_all_mc(struct qeth_card *card)
 206 {
 207         struct qeth_mc_mac *mc, *tmp;
 208
 209         spin_lock_bh(&card->mclock);
 210         list_for_each_entry_safe(mc, tmp, &card->mc_list, list) {
 211                 if (mc->is_vmac)
 212                         qeth_l2_send_setdelmac(card, mc->mc_addr,
 213                                         IPA_CMD_DELVMAC, NULL);
 214                 else
 215                         qeth_l2_send_delgroupmac(card, mc->mc_addr);
 216                 list_del(&mc->list);
 217                 kfree(mc);
 218         }
 219         spin_unlock_bh(&card->mclock);
 220 }
 221
 222 static inline int qeth_l2_get_cast_type(struct qeth_card *card,
 223                         struct sk_buff *skb)
 224 {
 225         if (card->info.type == QETH_CARD_TYPE_OSN)
 226                 return RTN_UNSPEC;
 227         if (is_broadcast_ether_addr(skb->data))
 228                 return RTN_BROADCAST;
 229         if (is_multicast_ether_addr(skb->data))
 230                 return RTN_MULTICAST;
 231         return RTN_UNSPEC;
 232 }
 233
 234 static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
 235                         struct sk_buff *skb, int ipv, int cast_type)
 236 {
 237         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
 238
 239         memset(hdr, 0, sizeof(struct qeth_hdr));
 240         hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
 241
 242         /* set byte byte 3 to casting flags */
 243         if (cast_type == RTN_MULTICAST)
 244                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 245         else if (cast_type == RTN_BROADCAST)
 246                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 247         else
 248                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 249
 250         hdr->hdr.l2.pkt_length = skb->len-QETH_HEADER_SIZE;
 251         /* VSWITCH relies on the VLAN
 252          * information to be present in
 253          * the QDIO header */
 254         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
 255                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
 256                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
 257         }
 258 }
 259
 260 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
 261                         struct qeth_reply *reply, unsigned long data)
 262 {
 263         struct qeth_ipa_cmd *cmd;
 264
 265         QETH_CARD_TEXT(card, 2, "L2sdvcb");
 266         cmd = (struct qeth_ipa_cmd *) data;
 267         if (cmd->hdr.return_code) {
 268                 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x. "
 269                           "Continuing\n", cmd->data.setdelvlan.vlan_id,
 270                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 271                 QETH_CARD_TEXT_(card, 2, "L2VL%4x", cmd->hdr.command);
 272                 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code);
 273         }
 274         return 0;
 275 }
 276
 277 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
 278                                 enum qeth_ipa_cmds ipacmd)
 279 {
 280         struct qeth_ipa_cmd *cmd;
 281         struct qeth_cmd_buffer *iob;
 282
 283         QETH_CARD_TEXT_(card, 4, "L2sdv%x", ipacmd);
 284         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 285         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 286         cmd->data.setdelvlan.vlan_id = i;
 287         return qeth_send_ipa_cmd(card, iob,
 288                                  qeth_l2_send_setdelvlan_cb, NULL);
 289 }
 290
 291 static void qeth_l2_process_vlans(struct qeth_card *card, int clear)
 292 {
 293         struct qeth_vlan_vid *id;
 294         QETH_CARD_TEXT(card, 3, "L2prcvln");
 295         spin_lock_bh(&card->vlanlock);
 296         list_for_each_entry(id, &card->vid_list, list) {
 297                 if (clear)
 298                         qeth_l2_send_setdelvlan(card, id->vid,
 299                                 IPA_CMD_DELVLAN);
 300                 else
 301                         qeth_l2_send_setdelvlan(card, id->vid,
 302                                 IPA_CMD_SETVLAN);
 303         }
 304         spin_unlock_bh(&card->vlanlock);
 305 }
 306
 307 static void qeth_l2_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
 308 {
 309         struct qeth_card *card = dev->ml_priv;
 310         struct qeth_vlan_vid *id;
 311
 312         QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
 313         if (card->info.type == QETH_CARD_TYPE_OSM) {
 314                 QETH_CARD_TEXT(card, 3, "aidOSM");
 315                 return;
 316         }
 317         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 318                 QETH_CARD_TEXT(card, 3, "aidREC");
 319                 return;
 320         }
 321         id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
 322         if (id) {
 323                 id->vid = vid;
 324                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
 325                 spin_lock_bh(&card->vlanlock);
 326                 list_add_tail(&id->list, &card->vid_list);
 327                 spin_unlock_bh(&card->vlanlock);
 328         }
 329 }
 330
 331 static void qeth_l2_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
 332 {
 333         struct qeth_vlan_vid *id, *tmpid = NULL;
 334         struct qeth_card *card = dev->ml_priv;
 335
 336         QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
 337         if (card->info.type == QETH_CARD_TYPE_OSM) {
 338                 QETH_CARD_TEXT(card, 3, "kidOSM");
 339                 return;
 340         }
 341         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 342                 QETH_CARD_TEXT(card, 3, "kidREC");
 343                 return;
 344         }
 345         spin_lock_bh(&card->vlanlock);
 346         list_for_each_entry(id, &card->vid_list, list) {
 347                 if (id->vid == vid) {
 348                         list_del(&id->list);
 349                         tmpid = id;
 350                         break;
 351                 }
 352         }
 353         spin_unlock_bh(&card->vlanlock);
 354         if (tmpid) {
 355                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 356                 kfree(tmpid);
 357         }
 358         qeth_l2_set_multicast_list(card->dev);
 359 }
 360
 361 static int qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
 362 {
 363         int rc = 0;
 364
 365         QETH_DBF_TEXT(SETUP , 2, "stopcard");
 366         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 367
 368         qeth_set_allowed_threads(card, 0, 1);
 369         if (card->read.state == CH_STATE_UP &&
 370             card->write.state == CH_STATE_UP &&
 371             (card->state == CARD_STATE_UP)) {
 372                 if (recovery_mode &&
 373                     card->info.type != QETH_CARD_TYPE_OSN) {
 374                         qeth_l2_stop(card->dev);
 375                 } else {
 376                         rtnl_lock();
 377                         dev_close(card->dev);
 378                         rtnl_unlock();
 379                 }
 380                 if (!card->use_hard_stop ||
 381                         recovery_mode) {
 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                 if (!card->use_hard_stop ||
 391                         recovery_mode)
 392                         qeth_l2_del_all_mc(card);
 393                 qeth_clear_ipacmd_list(card);
 394                 card->state = CARD_STATE_HARDSETUP;
 395         }
 396         if (card->state == CARD_STATE_HARDSETUP) {
 397                 qeth_qdio_clear_card(card, 0);
 398                 qeth_clear_qdio_buffers(card);
 399                 qeth_clear_working_pool_list(card);
 400                 card->state = CARD_STATE_DOWN;
 401         }
 402         if (card->state == CARD_STATE_DOWN) {
 403                 qeth_clear_cmd_buffers(&card->read);
 404                 qeth_clear_cmd_buffers(&card->write);
 405         }
 406         card->use_hard_stop = 0;
 407         return rc;
 408 }
 409
 410 static void qeth_l2_process_inbound_buffer(struct qeth_card *card,
 411                             struct qeth_qdio_buffer *buf, int index)
 412 {
 413         struct qdio_buffer_element *element;
 414         struct sk_buff *skb;
 415         struct qeth_hdr *hdr;
 416         int offset;
 417         unsigned int len;
 418
 419         /* get first element of current buffer */
 420         element = (struct qdio_buffer_element *)&buf->buffer->element[0];
 421         offset = 0;
 422         if (card->options.performance_stats)
 423                 card->perf_stats.bufs_rec++;
 424         while ((skb = qeth_core_get_next_skb(card, buf->buffer, &element,
 425                                        &offset, &hdr))) {
 426                 skb->dev = card->dev;
 427                 /* is device UP ? */
 428                 if (!(card->dev->flags & IFF_UP)) {
 429                         dev_kfree_skb_any(skb);
 430                         continue;
 431                 }
 432
 433                 switch (hdr->hdr.l2.id) {
 434                 case QETH_HEADER_TYPE_LAYER2:
 435                         skb->pkt_type = PACKET_HOST;
 436                         skb->protocol = eth_type_trans(skb, skb->dev);
 437                         if (card->options.checksum_type == NO_CHECKSUMMING)
 438                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 439                         else
 440                                 skb->ip_summed = CHECKSUM_NONE;
 441                         if (skb->protocol == htons(ETH_P_802_2))
 442                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
 443                         len = skb->len;
 444                         netif_rx(skb);
 445                         break;
 446                 case QETH_HEADER_TYPE_OSN:
 447                         if (card->info.type == QETH_CARD_TYPE_OSN) {
 448                                 skb_push(skb, sizeof(struct qeth_hdr));
 449                                 skb_copy_to_linear_data(skb, hdr,
 450                                                 sizeof(struct qeth_hdr));
 451                                 len = skb->len;
 452                                 card->osn_info.data_cb(skb);
 453                                 break;
 454                         }
 455                         /* else unknown */
 456                 default:
 457                         dev_kfree_skb_any(skb);
 458                         QETH_CARD_TEXT(card, 3, "inbunkno");
 459                         QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
 460                         continue;
 461                 }
 462                 card->stats.rx_packets++;
 463                 card->stats.rx_bytes += len;
 464         }
 465 }
 466
 467 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
 468                            enum qeth_ipa_cmds ipacmd,
 469                            int (*reply_cb) (struct qeth_card *,
 470                                             struct qeth_reply*,
 471                                             unsigned long))
 472 {
 473         struct qeth_ipa_cmd *cmd;
 474         struct qeth_cmd_buffer *iob;
 475
 476         QETH_CARD_TEXT(card, 2, "L2sdmac");
 477         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 478         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 479         cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
 480         memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
 481         return qeth_send_ipa_cmd(card, iob, reply_cb, NULL);
 482 }
 483
 484 static int qeth_l2_send_setmac_cb(struct qeth_card *card,
 485                            struct qeth_reply *reply,
 486                            unsigned long data)
 487 {
 488         struct qeth_ipa_cmd *cmd;
 489
 490         QETH_CARD_TEXT(card, 2, "L2Smaccb");
 491         cmd = (struct qeth_ipa_cmd *) data;
 492         if (cmd->hdr.return_code) {
 493                 QETH_CARD_TEXT_(card, 2, "L2er%x", cmd->hdr.return_code);
 494                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 495                 switch (cmd->hdr.return_code) {
 496                 case IPA_RC_L2_DUP_MAC:
 497                 case IPA_RC_L2_DUP_LAYER3_MAC:
 498                         dev_warn(&card->gdev->dev,
 499                                 "MAC address %pM already exists\n",
 500                                 card->dev->dev_addr);
 501                         break;
 502                 case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
 503                 case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
 504                         dev_warn(&card->gdev->dev,
 505                                 "MAC address %pM is not authorized\n",
 506                                 card->dev->dev_addr);
 507                         break;
 508                 default:
 509                         break;
 510                 }
 511                 cmd->hdr.return_code = -EIO;
 512         } else {
 513                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 514                 memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
 515                        OSA_ADDR_LEN);
 516                 dev_info(&card->gdev->dev,
 517                         "MAC address %pM successfully registered on device %s\n",
 518                         card->dev->dev_addr, card->dev->name);
 519         }
 520         return 0;
 521 }
 522
 523 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
 524 {
 525         QETH_CARD_TEXT(card, 2, "L2Setmac");
 526         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
 527                                           qeth_l2_send_setmac_cb);
 528 }
 529
 530 static int qeth_l2_send_delmac_cb(struct qeth_card *card,
 531                            struct qeth_reply *reply,
 532                            unsigned long data)
 533 {
 534         struct qeth_ipa_cmd *cmd;
 535
 536         QETH_CARD_TEXT(card, 2, "L2Dmaccb");
 537         cmd = (struct qeth_ipa_cmd *) data;
 538         if (cmd->hdr.return_code) {
 539                 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code);
 540                 cmd->hdr.return_code = -EIO;
 541                 return 0;
 542         }
 543         card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 544
 545         return 0;
 546 }
 547
 548 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
 549 {
 550         QETH_CARD_TEXT(card, 2, "L2Delmac");
 551         if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
 552                 return 0;
 553         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
 554                                           qeth_l2_send_delmac_cb);
 555 }
 556
 557 static int qeth_l2_request_initial_mac(struct qeth_card *card)
 558 {
 559         int rc = 0;
 560         char vendor_pre[] = {0x02, 0x00, 0x00};
 561
 562         QETH_DBF_TEXT(SETUP, 2, "doL2init");
 563         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
 564
 565         rc = qeth_query_setadapterparms(card);
 566         if (rc) {
 567                 QETH_DBF_MESSAGE(2, "could not query adapter parameters on "
 568                         "device %s: x%x\n", CARD_BUS_ID(card), rc);
 569         }
 570
 571         if (card->info.type == QETH_CARD_TYPE_IQD ||
 572             card->info.type == QETH_CARD_TYPE_OSM ||
 573             card->info.type == QETH_CARD_TYPE_OSX ||
 574             card->info.guestlan) {
 575                 rc = qeth_setadpparms_change_macaddr(card);
 576                 if (rc) {
 577                         QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
 578                                 "device %s: x%x\n", CARD_BUS_ID(card), rc);
 579                         QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 580                         return rc;
 581                 }
 582                 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN);
 583         } else {
 584                 random_ether_addr(card->dev->dev_addr);
 585                 memcpy(card->dev->dev_addr, vendor_pre, 3);
 586         }
 587         return 0;
 588 }
 589
 590 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 591 {
 592         struct sockaddr *addr = p;
 593         struct qeth_card *card = dev->ml_priv;
 594         int rc = 0;
 595
 596         QETH_CARD_TEXT(card, 3, "setmac");
 597
 598         if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
 599                 QETH_CARD_TEXT(card, 3, "setmcINV");
 600                 return -EOPNOTSUPP;
 601         }
 602
 603         if (card->info.type == QETH_CARD_TYPE_OSN ||
 604             card->info.type == QETH_CARD_TYPE_OSM ||
 605             card->info.type == QETH_CARD_TYPE_OSX) {
 606                 QETH_CARD_TEXT(card, 3, "setmcTYP");
 607                 return -EOPNOTSUPP;
 608         }
 609         QETH_CARD_HEX(card, 3, addr->sa_data, OSA_ADDR_LEN);
 610         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 611                 QETH_CARD_TEXT(card, 3, "setmcREC");
 612                 return -ERESTARTSYS;
 613         }
 614         rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
 615         if (!rc)
 616                 rc = qeth_l2_send_setmac(card, addr->sa_data);
 617         return rc;
 618 }
 619
 620 static void qeth_l2_set_multicast_list(struct net_device *dev)
 621 {
 622         struct qeth_card *card = dev->ml_priv;
 623         struct netdev_hw_addr *ha;
 624
 625         if (card->info.type == QETH_CARD_TYPE_OSN)
 626                 return ;
 627
 628         QETH_CARD_TEXT(card, 3, "setmulti");
 629         if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
 630             (card->state != CARD_STATE_UP))
 631                 return;
 632         qeth_l2_del_all_mc(card);
 633         spin_lock_bh(&card->mclock);
 634         netdev_for_each_mc_addr(ha, dev)
 635                 qeth_l2_add_mc(card, ha->addr, 0);
 636
 637         netdev_for_each_uc_addr(ha, dev)
 638                 qeth_l2_add_mc(card, ha->addr, 1);
 639
 640         spin_unlock_bh(&card->mclock);
 641         if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
 642                 return;
 643         qeth_setadp_promisc_mode(card);
 644 }
 645
 646 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 647 {
 648         int rc;
 649         struct qeth_hdr *hdr = NULL;
 650         int elements = 0;
 651         struct qeth_card *card = dev->ml_priv;
 652         struct sk_buff *new_skb = skb;
 653         int ipv = qeth_get_ip_version(skb);
 654         int cast_type = qeth_l2_get_cast_type(card, skb);
 655         struct qeth_qdio_out_q *queue = card->qdio.out_qs
 656                 [qeth_get_priority_queue(card, skb, ipv, cast_type)];
 657         int tx_bytes = skb->len;
 658         int data_offset = -1;
 659         int elements_needed = 0;
 660         int hd_len = 0;
 661
 662         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
 663                 card->stats.tx_carrier_errors++;
 664                 goto tx_drop;
 665         }
 666
 667         if ((card->info.type == QETH_CARD_TYPE_OSN) &&
 668             (skb->protocol == htons(ETH_P_IPV6)))
 669                 goto tx_drop;
 670
 671         if (card->options.performance_stats) {
 672                 card->perf_stats.outbound_cnt++;
 673                 card->perf_stats.outbound_start_time = qeth_get_micros();
 674         }
 675         netif_stop_queue(dev);
 676
 677         if (card->info.type == QETH_CARD_TYPE_OSN)
 678                 hdr = (struct qeth_hdr *)skb->data;
 679         else {
 680                 if (card->info.type == QETH_CARD_TYPE_IQD) {
 681                         new_skb = skb;
 682                         data_offset = ETH_HLEN;
 683                         hd_len = ETH_HLEN;
 684                         hdr = kmem_cache_alloc(qeth_core_header_cache,
 685                                                 GFP_ATOMIC);
 686                         if (!hdr)
 687                                 goto tx_drop;
 688                         elements_needed++;
 689                         skb_reset_mac_header(new_skb);
 690                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 691                         hdr->hdr.l2.pkt_length = new_skb->len;
 692                         memcpy(((char *)hdr) + sizeof(struct qeth_hdr),
 693                                 skb_mac_header(new_skb), ETH_HLEN);
 694                 } else {
 695                         /* create a clone with writeable headroom */
 696                         new_skb = skb_realloc_headroom(skb,
 697                                                 sizeof(struct qeth_hdr));
 698                         if (!new_skb)
 699                                 goto tx_drop;
 700                         hdr = (struct qeth_hdr *)skb_push(new_skb,
 701                                                 sizeof(struct qeth_hdr));
 702                         skb_set_mac_header(new_skb, sizeof(struct qeth_hdr));
 703                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 704                 }
 705         }
 706
 707         elements = qeth_get_elements_no(card, (void *)hdr, new_skb,
 708                                                 elements_needed);
 709         if (!elements) {
 710                 if (data_offset >= 0)
 711                         kmem_cache_free(qeth_core_header_cache, hdr);
 712                 goto tx_drop;
 713         }
 714
 715         if (card->info.type != QETH_CARD_TYPE_IQD) {
 716                 if (qeth_hdr_chk_and_bounce(new_skb,
 717                     sizeof(struct qeth_hdr_layer2)))
 718                         goto tx_drop;
 719                 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
 720                                          elements);
 721         } else
 722                 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
 723                                         elements, data_offset, hd_len);
 724         if (!rc) {
 725                 card->stats.tx_packets++;
 726                 card->stats.tx_bytes += tx_bytes;
 727                 if (new_skb != skb)
 728                         dev_kfree_skb_any(skb);
 729                 rc = NETDEV_TX_OK;
 730         } else {
 731                 if (data_offset >= 0)
 732                         kmem_cache_free(qeth_core_header_cache, hdr);
 733
 734                 if (rc == -EBUSY) {
 735                         if (new_skb != skb)
 736                                 dev_kfree_skb_any(new_skb);
 737                         return NETDEV_TX_BUSY;
 738                 } else
 739                         goto tx_drop;
 740         }
 741
 742         netif_wake_queue(dev);
 743         if (card->options.performance_stats)
 744                 card->perf_stats.outbound_time += qeth_get_micros() -
 745                         card->perf_stats.outbound_start_time;
 746         return rc;
 747
 748 tx_drop:
 749         card->stats.tx_dropped++;
 750         card->stats.tx_errors++;
 751         if ((new_skb != skb) && new_skb)
 752                 dev_kfree_skb_any(new_skb);
 753         dev_kfree_skb_any(skb);
 754         netif_wake_queue(dev);
 755         return NETDEV_TX_OK;
 756 }
 757
 758 static void qeth_l2_qdio_input_handler(struct ccw_device *ccwdev,
 759                         unsigned int qdio_err, unsigned int queue,
 760                         int first_element, int count, unsigned long card_ptr)
 761 {
 762         struct net_device *net_dev;
 763         struct qeth_card *card;
 764         struct qeth_qdio_buffer *buffer;
 765         int index;
 766         int i;
 767
 768         card = (struct qeth_card *) card_ptr;
 769         net_dev = card->dev;
 770         if (card->options.performance_stats) {
 771                 card->perf_stats.inbound_cnt++;
 772                 card->perf_stats.inbound_start_time = qeth_get_micros();
 773         }
 774         if (qdio_err & QDIO_ERROR_ACTIVATE_CHECK_CONDITION) {
 775                 QETH_CARD_TEXT(card, 1, "qdinchk");
 776                 QETH_CARD_TEXT_(card, 1, "%04X%04X", first_element,
 777                                 count);
 778                 QETH_CARD_TEXT_(card, 1, "%04X", queue);
 779                 qeth_schedule_recovery(card);
 780                 return;
 781         }
 782         for (i = first_element; i < (first_element + count); ++i) {
 783                 index = i % QDIO_MAX_BUFFERS_PER_Q;
 784                 buffer = &card->qdio.in_q->bufs[index];
 785                 if (!(qdio_err &&
 786                       qeth_check_qdio_errors(card, buffer->buffer, qdio_err,
 787                                              "qinerr")))
 788                         qeth_l2_process_inbound_buffer(card, buffer, index);
 789                 /* clear buffer and give back to hardware */
 790                 qeth_put_buffer_pool_entry(card, buffer->pool_entry);
 791                 qeth_queue_input_buffer(card, index);
 792         }
 793         if (card->options.performance_stats)
 794                 card->perf_stats.inbound_time += qeth_get_micros() -
 795                         card->perf_stats.inbound_start_time;
 796 }
 797
 798 static int qeth_l2_open(struct net_device *dev)
 799 {
 800         struct qeth_card *card = dev->ml_priv;
 801
 802         QETH_CARD_TEXT(card, 4, "qethopen");
 803         if (card->state != CARD_STATE_SOFTSETUP)
 804                 return -ENODEV;
 805
 806         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
 807              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
 808                 QETH_CARD_TEXT(card, 4, "nomacadr");
 809                 return -EPERM;
 810         }
 811         card->data.state = CH_STATE_UP;
 812         card->state = CARD_STATE_UP;
 813         netif_start_queue(dev);
 814
 815         if (!card->lan_online && netif_carrier_ok(dev))
 816                 netif_carrier_off(dev);
 817         return 0;
 818 }
 819
 820
 821 static int qeth_l2_stop(struct net_device *dev)
 822 {
 823         struct qeth_card *card = dev->ml_priv;
 824
 825         QETH_CARD_TEXT(card, 4, "qethstop");
 826         netif_tx_disable(dev);
 827         if (card->state == CARD_STATE_UP)
 828                 card->state = CARD_STATE_SOFTSETUP;
 829         return 0;
 830 }
 831
 832 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 833 {
 834         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 835
 836         INIT_LIST_HEAD(&card->vid_list);
 837         INIT_LIST_HEAD(&card->mc_list);
 838         card->options.layer2 = 1;
 839         card->discipline.input_handler = (qdio_handler_t *)
 840                 qeth_l2_qdio_input_handler;
 841         card->discipline.output_handler = (qdio_handler_t *)
 842                 qeth_qdio_output_handler;
 843         card->discipline.recover = qeth_l2_recover;
 844         return 0;
 845 }
 846
 847 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
 848 {
 849         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
 850
 851         qeth_set_allowed_threads(card, 0, 1);
 852         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 853
 854         if (cgdev->state == CCWGROUP_ONLINE) {
 855                 card->use_hard_stop = 1;
 856                 qeth_l2_set_offline(cgdev);
 857         }
 858
 859         if (card->dev) {
 860                 unregister_netdev(card->dev);
 861                 card->dev = NULL;
 862         }
 863         return;
 864 }
 865
 866 static const struct ethtool_ops qeth_l2_ethtool_ops = {
 867         .get_link = ethtool_op_get_link,
 868         .get_strings = qeth_core_get_strings,
 869         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 870         .get_sset_count = qeth_core_get_sset_count,
 871         .get_drvinfo = qeth_core_get_drvinfo,
 872         .get_settings = qeth_core_ethtool_get_settings,
 873 };
 874
 875 static const struct ethtool_ops qeth_l2_osn_ops = {
 876         .get_strings = qeth_core_get_strings,
 877         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 878         .get_sset_count = qeth_core_get_sset_count,
 879         .get_drvinfo = qeth_core_get_drvinfo,
 880 };
 881
 882 static const struct net_device_ops qeth_l2_netdev_ops = {
 883         .ndo_open               = qeth_l2_open,
 884         .ndo_stop               = qeth_l2_stop,
 885         .ndo_get_stats          = qeth_get_stats,
 886         .ndo_start_xmit         = qeth_l2_hard_start_xmit,
 887         .ndo_validate_addr      = eth_validate_addr,
 888         .ndo_set_multicast_list = qeth_l2_set_multicast_list,
 889         .ndo_do_ioctl           = qeth_l2_do_ioctl,
 890         .ndo_set_mac_address    = qeth_l2_set_mac_address,
 891         .ndo_change_mtu         = qeth_change_mtu,
 892         .ndo_vlan_rx_add_vid    = qeth_l2_vlan_rx_add_vid,
 893         .ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,
 894         .ndo_tx_timeout         = qeth_tx_timeout,
 895 };
 896
 897 static int qeth_l2_setup_netdev(struct qeth_card *card)
 898 {
 899         switch (card->info.type) {
 900         case QETH_CARD_TYPE_IQD:
 901                 card->dev = alloc_netdev(0, "hsi%d", ether_setup);
 902                 break;
 903         case QETH_CARD_TYPE_OSN:
 904                 card->dev = alloc_netdev(0, "osn%d", ether_setup);
 905                 card->dev->flags |= IFF_NOARP;
 906                 break;
 907         default:
 908                 card->dev = alloc_etherdev(0);
 909         }
 910
 911         if (!card->dev)
 912                 return -ENODEV;
 913
 914         card->dev->ml_priv = card;
 915         card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
 916         card->dev->mtu = card->info.initial_mtu;
 917         card->dev->netdev_ops = &qeth_l2_netdev_ops;
 918         if (card->info.type != QETH_CARD_TYPE_OSN)
 919                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops);
 920         else
 921                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops);
 922         card->dev->features |= NETIF_F_HW_VLAN_FILTER;
 923         card->info.broadcast_capable = 1;
 924         qeth_l2_request_initial_mac(card);
 925         SET_NETDEV_DEV(card->dev, &card->gdev->dev);
 926         return register_netdev(card->dev);
 927 }
 928
 929 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 930 {
 931         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 932         int rc = 0;
 933         enum qeth_card_states recover_flag;
 934
 935         BUG_ON(!card);
 936         mutex_lock(&card->discipline_mutex);
 937         mutex_lock(&card->conf_mutex);
 938         QETH_DBF_TEXT(SETUP, 2, "setonlin");
 939         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 940
 941         recover_flag = card->state;
 942         rc = qeth_core_hardsetup_card(card);
 943         if (rc) {
 944                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
 945                 rc = -ENODEV;
 946                 goto out_remove;
 947         }
 948
 949         if (!card->dev && qeth_l2_setup_netdev(card)) {
 950                 rc = -ENODEV;
 951                 goto out_remove;
 952         }
 953
 954         if (card->info.type != QETH_CARD_TYPE_OSN)
 955                 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
 956
 957         card->state = CARD_STATE_HARDSETUP;
 958         qeth_print_status_message(card);
 959
 960         /* softsetup */
 961         QETH_DBF_TEXT(SETUP, 2, "softsetp");
 962
 963         rc = qeth_send_startlan(card);
 964         if (rc) {
 965                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 966                 if (rc == 0xe080) {
 967                         dev_warn(&card->gdev->dev,
 968                                 "The LAN is offline\n");
 969                         card->lan_online = 0;
 970                         goto out;
 971                 }
 972                 rc = -ENODEV;
 973                 goto out_remove;
 974         } else
 975                 card->lan_online = 1;
 976
 977         if ((card->info.type == QETH_CARD_TYPE_OSD) ||
 978             (card->info.type == QETH_CARD_TYPE_OSX))
 979                 /* configure isolation level */
 980                 qeth_set_access_ctrl_online(card);
 981
 982         if (card->info.type != QETH_CARD_TYPE_OSN &&
 983             card->info.type != QETH_CARD_TYPE_OSM)
 984                 qeth_l2_process_vlans(card, 0);
 985
 986         netif_tx_disable(card->dev);
 987
 988         rc = qeth_init_qdio_queues(card);
 989         if (rc) {
 990                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
 991                 rc = -ENODEV;
 992                 goto out_remove;
 993         }
 994         card->state = CARD_STATE_SOFTSETUP;
 995         netif_carrier_on(card->dev);
 996
 997         qeth_set_allowed_threads(card, 0xffffffff, 0);
 998         if (recover_flag == CARD_STATE_RECOVER) {
 999                 if (recovery_mode &&
1000                     card->info.type != QETH_CARD_TYPE_OSN) {
1001                         qeth_l2_open(card->dev);
1002                 } else {
1003                         rtnl_lock();
1004                         dev_open(card->dev);
1005                         rtnl_unlock();
1006                 }
1007                 /* this also sets saved unicast addresses */
1008                 qeth_l2_set_multicast_list(card->dev);
1009         }
1010         /* let user_space know that device is online */
1011         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1012 out:
1013         mutex_unlock(&card->conf_mutex);
1014         mutex_unlock(&card->discipline_mutex);
1015         return 0;
1016
1017 out_remove:
1018         card->use_hard_stop = 1;
1019         qeth_l2_stop_card(card, 0);
1020         ccw_device_set_offline(CARD_DDEV(card));
1021         ccw_device_set_offline(CARD_WDEV(card));
1022         ccw_device_set_offline(CARD_RDEV(card));
1023         if (recover_flag == CARD_STATE_RECOVER)
1024                 card->state = CARD_STATE_RECOVER;
1025         else
1026                 card->state = CARD_STATE_DOWN;
1027         mutex_unlock(&card->conf_mutex);
1028         mutex_unlock(&card->discipline_mutex);
1029         return rc;
1030 }
1031
1032 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1033 {
1034         return __qeth_l2_set_online(gdev, 0);
1035 }
1036
1037 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1038                                         int recovery_mode)
1039 {
1040         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1041         int rc = 0, rc2 = 0, rc3 = 0;
1042         enum qeth_card_states recover_flag;
1043
1044         mutex_lock(&card->discipline_mutex);
1045         mutex_lock(&card->conf_mutex);
1046         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1047         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1048
1049         if (card->dev && netif_carrier_ok(card->dev))
1050                 netif_carrier_off(card->dev);
1051         recover_flag = card->state;
1052         qeth_l2_stop_card(card, recovery_mode);
1053         rc  = ccw_device_set_offline(CARD_DDEV(card));
1054         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1055         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1056         if (!rc)
1057                 rc = (rc2) ? rc2 : rc3;
1058         if (rc)
1059                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1060         if (recover_flag == CARD_STATE_UP)
1061                 card->state = CARD_STATE_RECOVER;
1062         /* let user_space know that device is offline */
1063         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1064         mutex_unlock(&card->conf_mutex);
1065         mutex_unlock(&card->discipline_mutex);
1066         return 0;
1067 }
1068
1069 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1070 {
1071         return __qeth_l2_set_offline(cgdev, 0);
1072 }
1073
1074 static int qeth_l2_recover(void *ptr)
1075 {
1076         struct qeth_card *card;
1077         int rc = 0;
1078
1079         card = (struct qeth_card *) ptr;
1080         QETH_CARD_TEXT(card, 2, "recover1");
1081         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1082                 return 0;
1083         QETH_CARD_TEXT(card, 2, "recover2");
1084         dev_warn(&card->gdev->dev,
1085                 "A recovery process has been started for the device\n");
1086         card->use_hard_stop = 1;
1087         __qeth_l2_set_offline(card->gdev, 1);
1088         rc = __qeth_l2_set_online(card->gdev, 1);
1089         /* don't run another scheduled recovery */
1090         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1091         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1092         if (!rc)
1093                 dev_info(&card->gdev->dev,
1094                         "Device successfully recovered!\n");
1095         else {
1096                 rtnl_lock();
1097                 dev_close(card->dev);
1098                 rtnl_unlock();
1099                 dev_warn(&card->gdev->dev, "The qeth device driver "
1100                         "failed to recover an error on the device\n");
1101         }
1102         return 0;
1103 }
1104
1105 static int __init qeth_l2_init(void)
1106 {
1107         pr_info("register layer 2 discipline\n");
1108         return 0;
1109 }
1110
1111 static void __exit qeth_l2_exit(void)
1112 {
1113         pr_info("unregister layer 2 discipline\n");
1114 }
1115
1116 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1117 {
1118         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1119         qeth_qdio_clear_card(card, 0);
1120         qeth_clear_qdio_buffers(card);
1121 }
1122
1123 static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev)
1124 {
1125         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1126
1127         if (card->dev)
1128                 netif_device_detach(card->dev);
1129         qeth_set_allowed_threads(card, 0, 1);
1130         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1131         if (gdev->state == CCWGROUP_OFFLINE)
1132                 return 0;
1133         if (card->state == CARD_STATE_UP) {
1134                 card->use_hard_stop = 1;
1135                 __qeth_l2_set_offline(card->gdev, 1);
1136         } else
1137                 __qeth_l2_set_offline(card->gdev, 0);
1138         return 0;
1139 }
1140
1141 static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
1142 {
1143         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1144         int rc = 0;
1145
1146         if (gdev->state == CCWGROUP_OFFLINE)
1147                 goto out;
1148
1149         if (card->state == CARD_STATE_RECOVER) {
1150                 rc = __qeth_l2_set_online(card->gdev, 1);
1151                 if (rc) {
1152                         rtnl_lock();
1153                         dev_close(card->dev);
1154                         rtnl_unlock();
1155                 }
1156         } else
1157                 rc = __qeth_l2_set_online(card->gdev, 0);
1158 out:
1159         qeth_set_allowed_threads(card, 0xffffffff, 0);
1160         if (card->dev)
1161                 netif_device_attach(card->dev);
1162         if (rc)
1163                 dev_warn(&card->gdev->dev, "The qeth device driver "
1164                         "failed to recover an error on the device\n");
1165         return rc;
1166 }
1167
1168 struct ccwgroup_driver qeth_l2_ccwgroup_driver = {
1169         .probe = qeth_l2_probe_device,
1170         .remove = qeth_l2_remove_device,
1171         .set_online = qeth_l2_set_online,
1172         .set_offline = qeth_l2_set_offline,
1173         .shutdown = qeth_l2_shutdown,
1174         .freeze = qeth_l2_pm_suspend,
1175         .thaw = qeth_l2_pm_resume,
1176         .restore = qeth_l2_pm_resume,
1177 };
1178 EXPORT_SYMBOL_GPL(qeth_l2_ccwgroup_driver);
1179
1180 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1181                            struct qeth_cmd_buffer *iob)
1182 {
1183         unsigned long flags;
1184         int rc = 0;
1185
1186         QETH_CARD_TEXT(card, 5, "osndctrd");
1187
1188         wait_event(card->wait_q,
1189                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1190         qeth_prepare_control_data(card, len, iob);
1191         QETH_CARD_TEXT(card, 6, "osnoirqp");
1192         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1193         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1194                               (addr_t) iob, 0, 0);
1195         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1196         if (rc) {
1197                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1198                            "ccw_device_start rc = %i\n", rc);
1199                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1200                 qeth_release_buffer(iob->channel, iob);
1201                 atomic_set(&card->write.irq_pending, 0);
1202                 wake_up(&card->wait_q);
1203         }
1204         return rc;
1205 }
1206
1207 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1208                         struct qeth_cmd_buffer *iob, int data_len)
1209 {
1210         u16 s1, s2;
1211
1212         QETH_CARD_TEXT(card, 4, "osndipa");
1213
1214         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1215         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1216         s2 = (u16)data_len;
1217         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1218         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1219         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1220         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1221         return qeth_osn_send_control_data(card, s1, iob);
1222 }
1223
1224 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1225 {
1226         struct qeth_cmd_buffer *iob;
1227         struct qeth_card *card;
1228         int rc;
1229
1230         if (!dev)
1231                 return -ENODEV;
1232         card = dev->ml_priv;
1233         if (!card)
1234                 return -ENODEV;
1235         QETH_CARD_TEXT(card, 2, "osnsdmc");
1236         if ((card->state != CARD_STATE_UP) &&
1237             (card->state != CARD_STATE_SOFTSETUP))
1238                 return -ENODEV;
1239         iob = qeth_wait_for_buffer(&card->write);
1240         memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1241         rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1242         return rc;
1243 }
1244 EXPORT_SYMBOL(qeth_osn_assist);
1245
1246 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1247                   int (*assist_cb)(struct net_device *, void *),
1248                   int (*data_cb)(struct sk_buff *))
1249 {
1250         struct qeth_card *card;
1251
1252         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1253         if (*dev == NULL)
1254                 return -ENODEV;
1255         card = (*dev)->ml_priv;
1256         if (!card)
1257                 return -ENODEV;
1258         QETH_CARD_TEXT(card, 2, "osnreg");
1259         if ((assist_cb == NULL) || (data_cb == NULL))
1260                 return -EINVAL;
1261         card->osn_info.assist_cb = assist_cb;
1262         card->osn_info.data_cb = data_cb;
1263         return 0;
1264 }
1265 EXPORT_SYMBOL(qeth_osn_register);
1266
1267 void qeth_osn_deregister(struct net_device *dev)
1268 {
1269         struct qeth_card *card;
1270
1271         if (!dev)
1272                 return;
1273         card = dev->ml_priv;
1274         if (!card)
1275                 return;
1276         QETH_CARD_TEXT(card, 2, "osndereg");
1277         card->osn_info.assist_cb = NULL;
1278         card->osn_info.data_cb = NULL;
1279         return;
1280 }
1281 EXPORT_SYMBOL(qeth_osn_deregister);
1282
1283 module_init(qeth_l2_init);
1284 module_exit(qeth_l2_exit);
1285 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1286 MODULE_DESCRIPTION("qeth layer 2 discipline");
1287 MODULE_LICENSE("GPL");