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

   1 /*
   2  *    Copyright IBM Corp. 2007, 2009
   3  *    Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
   4  *               Frank Pavlic <fpavlic@de.ibm.com>,
   5  *               Thomas Spatzier <tspat@de.ibm.com>,
   6  *               Frank Blaschka <frank.blaschka@de.ibm.com>
   7  */
   8
   9 #define KMSG_COMPONENT "qeth"
  10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  11
  12 #include <linux/module.h>
  13 #include <linux/moduleparam.h>
  14 #include <linux/string.h>
  15 #include <linux/errno.h>
  16 #include <linux/kernel.h>
  17 #include <linux/slab.h>
  18 #include <linux/etherdevice.h>
  19 #include <linux/mii.h>
  20 #include <linux/ip.h>
  21 #include <linux/list.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_OSD ||
  58                      card->info.type == QETH_CARD_TYPE_OSM ||
  59                      card->info.type == QETH_CARD_TYPE_OSX) &&
  60                     !card->info.guestlan)
  61                         return 1;
  62                 return 0;
  63                 break;
  64         case SIOCGMIIPHY:
  65                 mii_data = if_mii(rq);
  66                 mii_data->phy_id = 0;
  67                 break;
  68         case SIOCGMIIREG:
  69                 mii_data = if_mii(rq);
  70                 if (mii_data->phy_id != 0)
  71                         rc = -EINVAL;
  72                 else
  73                         mii_data->val_out = qeth_mdio_read(dev,
  74                                 mii_data->phy_id, mii_data->reg_num);
  75                 break;
  76         case SIOC_QETH_QUERY_OAT:
  77                 rc = qeth_query_oat_command(card, rq->ifr_ifru.ifru_data);
  78                 break;
  79         default:
  80                 rc = -EOPNOTSUPP;
  81         }
  82         if (rc)
  83                 QETH_CARD_TEXT_(card, 2, "ioce%d", rc);
  84         return rc;
  85 }
  86
  87 static int qeth_l2_verify_dev(struct net_device *dev)
  88 {
  89         struct qeth_card *card;
  90         unsigned long flags;
  91         int rc = 0;
  92
  93         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
  94         list_for_each_entry(card, &qeth_core_card_list.list, list) {
  95                 if (card->dev == dev) {
  96                         rc = QETH_REAL_CARD;
  97                         break;
  98                 }
  99         }
 100         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
 101
 102         return rc;
 103 }
 104
 105 static struct net_device *qeth_l2_netdev_by_devno(unsigned char *read_dev_no)
 106 {
 107         struct qeth_card *card;
 108         struct net_device *ndev;
 109         __u16 temp_dev_no;
 110         unsigned long flags;
 111         struct ccw_dev_id read_devid;
 112
 113         ndev = NULL;
 114         memcpy(&temp_dev_no, read_dev_no, 2);
 115         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
 116         list_for_each_entry(card, &qeth_core_card_list.list, list) {
 117                 ccw_device_get_id(CARD_RDEV(card), &read_devid);
 118                 if (read_devid.devno == temp_dev_no) {
 119                         ndev = card->dev;
 120                         break;
 121                 }
 122         }
 123         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
 124         return ndev;
 125 }
 126
 127 static int qeth_l2_send_setgroupmac_cb(struct qeth_card *card,
 128                                 struct qeth_reply *reply,
 129                                 unsigned long data)
 130 {
 131         struct qeth_ipa_cmd *cmd;
 132         __u8 *mac;
 133
 134         QETH_CARD_TEXT(card, 2, "L2Sgmacb");
 135         cmd = (struct qeth_ipa_cmd *) data;
 136         mac = &cmd->data.setdelmac.mac[0];
 137         /* MAC already registered, needed in couple/uncouple case */
 138         if (cmd->hdr.return_code ==  IPA_RC_L2_DUP_MAC) {
 139                 QETH_DBF_MESSAGE(2, "Group MAC %pM already existing on %s \n",
 140                           mac, QETH_CARD_IFNAME(card));
 141                 cmd->hdr.return_code = 0;
 142         }
 143         if (cmd->hdr.return_code)
 144                 QETH_DBF_MESSAGE(2, "Could not set group MAC %pM on %s: %x\n",
 145                           mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 146         return 0;
 147 }
 148
 149 static int qeth_l2_send_setgroupmac(struct qeth_card *card, __u8 *mac)
 150 {
 151         QETH_CARD_TEXT(card, 2, "L2Sgmac");
 152         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETGMAC,
 153                                           qeth_l2_send_setgroupmac_cb);
 154 }
 155
 156 static int qeth_l2_send_delgroupmac_cb(struct qeth_card *card,
 157                                 struct qeth_reply *reply,
 158                                 unsigned long data)
 159 {
 160         struct qeth_ipa_cmd *cmd;
 161         __u8 *mac;
 162
 163         QETH_CARD_TEXT(card, 2, "L2Dgmacb");
 164         cmd = (struct qeth_ipa_cmd *) data;
 165         mac = &cmd->data.setdelmac.mac[0];
 166         if (cmd->hdr.return_code)
 167                 QETH_DBF_MESSAGE(2, "Could not delete group MAC %pM on %s: %x\n",
 168                           mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 169         return 0;
 170 }
 171
 172 static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac)
 173 {
 174         QETH_CARD_TEXT(card, 2, "L2Dgmac");
 175         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELGMAC,
 176                                           qeth_l2_send_delgroupmac_cb);
 177 }
 178
 179 static void qeth_l2_add_mc(struct qeth_card *card, __u8 *mac, int vmac)
 180 {
 181         struct qeth_mc_mac *mc;
 182         int rc;
 183
 184         mc = kmalloc(sizeof(struct qeth_mc_mac), GFP_ATOMIC);
 185
 186         if (!mc)
 187                 return;
 188
 189         memcpy(mc->mc_addr, mac, OSA_ADDR_LEN);
 190         mc->mc_addrlen = OSA_ADDR_LEN;
 191         mc->is_vmac = vmac;
 192
 193         if (vmac) {
 194                 rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
 195                                         NULL);
 196         } else {
 197                 rc = qeth_l2_send_setgroupmac(card, mac);
 198         }
 199
 200         if (!rc)
 201                 list_add_tail(&mc->list, &card->mc_list);
 202         else
 203                 kfree(mc);
 204 }
 205
 206 static void qeth_l2_del_all_mc(struct qeth_card *card, int del)
 207 {
 208         struct qeth_mc_mac *mc, *tmp;
 209
 210         spin_lock_bh(&card->mclock);
 211         list_for_each_entry_safe(mc, tmp, &card->mc_list, list) {
 212                 if (del) {
 213                         if (mc->is_vmac)
 214                                 qeth_l2_send_setdelmac(card, mc->mc_addr,
 215                                         IPA_CMD_DELVMAC, NULL);
 216                         else
 217                                 qeth_l2_send_delgroupmac(card, mc->mc_addr);
 218                 }
 219                 list_del(&mc->list);
 220                 kfree(mc);
 221         }
 222         spin_unlock_bh(&card->mclock);
 223 }
 224
 225 static inline int qeth_l2_get_cast_type(struct qeth_card *card,
 226                         struct sk_buff *skb)
 227 {
 228         if (card->info.type == QETH_CARD_TYPE_OSN)
 229                 return RTN_UNSPEC;
 230         if (is_broadcast_ether_addr(skb->data))
 231                 return RTN_BROADCAST;
 232         if (is_multicast_ether_addr(skb->data))
 233                 return RTN_MULTICAST;
 234         return RTN_UNSPEC;
 235 }
 236
 237 static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
 238                         struct sk_buff *skb, int ipv, int cast_type)
 239 {
 240         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
 241
 242         memset(hdr, 0, sizeof(struct qeth_hdr));
 243         hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
 244
 245         /* set byte byte 3 to casting flags */
 246         if (cast_type == RTN_MULTICAST)
 247                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 248         else if (cast_type == RTN_BROADCAST)
 249                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 250         else
 251                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 252
 253         hdr->hdr.l2.pkt_length = skb->len-QETH_HEADER_SIZE;
 254         /* VSWITCH relies on the VLAN
 255          * information to be present in
 256          * the QDIO header */
 257         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
 258                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
 259                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
 260         }
 261 }
 262
 263 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
 264                         struct qeth_reply *reply, unsigned long data)
 265 {
 266         struct qeth_ipa_cmd *cmd;
 267
 268         QETH_CARD_TEXT(card, 2, "L2sdvcb");
 269         cmd = (struct qeth_ipa_cmd *) data;
 270         if (cmd->hdr.return_code) {
 271                 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x. "
 272                           "Continuing\n", cmd->data.setdelvlan.vlan_id,
 273                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 274                 QETH_CARD_TEXT_(card, 2, "L2VL%4x", cmd->hdr.command);
 275                 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code);
 276         }
 277         return 0;
 278 }
 279
 280 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
 281                                 enum qeth_ipa_cmds ipacmd)
 282 {
 283         struct qeth_ipa_cmd *cmd;
 284         struct qeth_cmd_buffer *iob;
 285
 286         QETH_CARD_TEXT_(card, 4, "L2sdv%x", ipacmd);
 287         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 288         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 289         cmd->data.setdelvlan.vlan_id = i;
 290         return qeth_send_ipa_cmd(card, iob,
 291                                  qeth_l2_send_setdelvlan_cb, NULL);
 292 }
 293
 294 static void qeth_l2_process_vlans(struct qeth_card *card)
 295 {
 296         struct qeth_vlan_vid *id;
 297         QETH_CARD_TEXT(card, 3, "L2prcvln");
 298         spin_lock_bh(&card->vlanlock);
 299         list_for_each_entry(id, &card->vid_list, list) {
 300                 qeth_l2_send_setdelvlan(card, id->vid, IPA_CMD_SETVLAN);
 301         }
 302         spin_unlock_bh(&card->vlanlock);
 303 }
 304
 305 static int qeth_l2_vlan_rx_add_vid(struct net_device *dev,
 306                                    __be16 proto, u16 vid)
 307 {
 308         struct qeth_card *card = dev->ml_priv;
 309         struct qeth_vlan_vid *id;
 310
 311         QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
 312         if (!vid)
 313                 return 0;
 314         if (card->info.type == QETH_CARD_TYPE_OSM) {
 315                 QETH_CARD_TEXT(card, 3, "aidOSM");
 316                 return 0;
 317         }
 318         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 319                 QETH_CARD_TEXT(card, 3, "aidREC");
 320                 return 0;
 321         }
 322         id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
 323         if (id) {
 324                 id->vid = vid;
 325                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
 326                 spin_lock_bh(&card->vlanlock);
 327                 list_add_tail(&id->list, &card->vid_list);
 328                 spin_unlock_bh(&card->vlanlock);
 329         } else {
 330                 return -ENOMEM;
 331         }
 332         return 0;
 333 }
 334
 335 static int qeth_l2_vlan_rx_kill_vid(struct net_device *dev,
 336                                     __be16 proto, u16 vid)
 337 {
 338         struct qeth_vlan_vid *id, *tmpid = NULL;
 339         struct qeth_card *card = dev->ml_priv;
 340
 341         QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
 342         if (card->info.type == QETH_CARD_TYPE_OSM) {
 343                 QETH_CARD_TEXT(card, 3, "kidOSM");
 344                 return 0;
 345         }
 346         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 347                 QETH_CARD_TEXT(card, 3, "kidREC");
 348                 return 0;
 349         }
 350         spin_lock_bh(&card->vlanlock);
 351         list_for_each_entry(id, &card->vid_list, list) {
 352                 if (id->vid == vid) {
 353                         list_del(&id->list);
 354                         tmpid = id;
 355                         break;
 356                 }
 357         }
 358         spin_unlock_bh(&card->vlanlock);
 359         if (tmpid) {
 360                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 361                 kfree(tmpid);
 362         }
 363         qeth_l2_set_multicast_list(card->dev);
 364         return 0;
 365 }
 366
 367 static int qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
 368 {
 369         int rc = 0;
 370
 371         QETH_DBF_TEXT(SETUP , 2, "stopcard");
 372         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 373
 374         qeth_set_allowed_threads(card, 0, 1);
 375         if (card->read.state == CH_STATE_UP &&
 376             card->write.state == CH_STATE_UP &&
 377             (card->state == CARD_STATE_UP)) {
 378                 if (recovery_mode &&
 379                     card->info.type != QETH_CARD_TYPE_OSN) {
 380                         qeth_l2_stop(card->dev);
 381                 } else {
 382                         rtnl_lock();
 383                         dev_close(card->dev);
 384                         rtnl_unlock();
 385                 }
 386                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 387                 card->state = CARD_STATE_SOFTSETUP;
 388         }
 389         if (card->state == CARD_STATE_SOFTSETUP) {
 390                 qeth_l2_del_all_mc(card, 0);
 391                 qeth_clear_ipacmd_list(card);
 392                 card->state = CARD_STATE_HARDSETUP;
 393         }
 394         if (card->state == CARD_STATE_HARDSETUP) {
 395                 qeth_qdio_clear_card(card, 0);
 396                 qeth_clear_qdio_buffers(card);
 397                 qeth_clear_working_pool_list(card);
 398                 card->state = CARD_STATE_DOWN;
 399         }
 400         if (card->state == CARD_STATE_DOWN) {
 401                 qeth_clear_cmd_buffers(&card->read);
 402                 qeth_clear_cmd_buffers(&card->write);
 403         }
 404         return rc;
 405 }
 406
 407 static int qeth_l2_process_inbound_buffer(struct qeth_card *card,
 408                                 int budget, int *done)
 409 {
 410         int work_done = 0;
 411         struct sk_buff *skb;
 412         struct qeth_hdr *hdr;
 413         unsigned int len;
 414
 415         *done = 0;
 416         WARN_ON_ONCE(!budget);
 417         while (budget) {
 418                 skb = qeth_core_get_next_skb(card,
 419                         &card->qdio.in_q->bufs[card->rx.b_index],
 420                         &card->rx.b_element, &card->rx.e_offset, &hdr);
 421                 if (!skb) {
 422                         *done = 1;
 423                         break;
 424                 }
 425                 skb->dev = card->dev;
 426                 switch (hdr->hdr.l2.id) {
 427                 case QETH_HEADER_TYPE_LAYER2:
 428                         skb->pkt_type = PACKET_HOST;
 429                         skb->protocol = eth_type_trans(skb, skb->dev);
 430                         skb->ip_summed = CHECKSUM_NONE;
 431                         if (skb->protocol == htons(ETH_P_802_2))
 432                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
 433                         len = skb->len;
 434                         netif_receive_skb(skb);
 435                         break;
 436                 case QETH_HEADER_TYPE_OSN:
 437                         if (card->info.type == QETH_CARD_TYPE_OSN) {
 438                                 skb_push(skb, sizeof(struct qeth_hdr));
 439                                 skb_copy_to_linear_data(skb, hdr,
 440                                                 sizeof(struct qeth_hdr));
 441                                 len = skb->len;
 442                                 card->osn_info.data_cb(skb);
 443                                 break;
 444                         }
 445                         /* else unknown */
 446                 default:
 447                         dev_kfree_skb_any(skb);
 448                         QETH_CARD_TEXT(card, 3, "inbunkno");
 449                         QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
 450                         continue;
 451                 }
 452                 work_done++;
 453                 budget--;
 454                 card->stats.rx_packets++;
 455                 card->stats.rx_bytes += len;
 456         }
 457         return work_done;
 458 }
 459
 460 static int qeth_l2_poll(struct napi_struct *napi, int budget)
 461 {
 462         struct qeth_card *card = container_of(napi, struct qeth_card, napi);
 463         int work_done = 0;
 464         struct qeth_qdio_buffer *buffer;
 465         int done;
 466         int new_budget = budget;
 467
 468         if (card->options.performance_stats) {
 469                 card->perf_stats.inbound_cnt++;
 470                 card->perf_stats.inbound_start_time = qeth_get_micros();
 471         }
 472
 473         while (1) {
 474                 if (!card->rx.b_count) {
 475                         card->rx.qdio_err = 0;
 476                         card->rx.b_count = qdio_get_next_buffers(
 477                                 card->data.ccwdev, 0, &card->rx.b_index,
 478                                 &card->rx.qdio_err);
 479                         if (card->rx.b_count <= 0) {
 480                                 card->rx.b_count = 0;
 481                                 break;
 482                         }
 483                         card->rx.b_element =
 484                                 &card->qdio.in_q->bufs[card->rx.b_index]
 485                                 .buffer->element[0];
 486                         card->rx.e_offset = 0;
 487                 }
 488
 489                 while (card->rx.b_count) {
 490                         buffer = &card->qdio.in_q->bufs[card->rx.b_index];
 491                         if (!(card->rx.qdio_err &&
 492                             qeth_check_qdio_errors(card, buffer->buffer,
 493                             card->rx.qdio_err, "qinerr")))
 494                                 work_done += qeth_l2_process_inbound_buffer(
 495                                         card, new_budget, &done);
 496                         else
 497                                 done = 1;
 498
 499                         if (done) {
 500                                 if (card->options.performance_stats)
 501                                         card->perf_stats.bufs_rec++;
 502                                 qeth_put_buffer_pool_entry(card,
 503                                         buffer->pool_entry);
 504                                 qeth_queue_input_buffer(card, card->rx.b_index);
 505                                 card->rx.b_count--;
 506                                 if (card->rx.b_count) {
 507                                         card->rx.b_index =
 508                                                 (card->rx.b_index + 1) %
 509                                                 QDIO_MAX_BUFFERS_PER_Q;
 510                                         card->rx.b_element =
 511                                                 &card->qdio.in_q
 512                                                 ->bufs[card->rx.b_index]
 513                                                 .buffer->element[0];
 514                                         card->rx.e_offset = 0;
 515                                 }
 516                         }
 517
 518                         if (work_done >= budget)
 519                                 goto out;
 520                         else
 521                                 new_budget = budget - work_done;
 522                 }
 523         }
 524
 525         napi_complete(napi);
 526         if (qdio_start_irq(card->data.ccwdev, 0))
 527                 napi_schedule(&card->napi);
 528 out:
 529         if (card->options.performance_stats)
 530                 card->perf_stats.inbound_time += qeth_get_micros() -
 531                         card->perf_stats.inbound_start_time;
 532         return work_done;
 533 }
 534
 535 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
 536                            enum qeth_ipa_cmds ipacmd,
 537                            int (*reply_cb) (struct qeth_card *,
 538                                             struct qeth_reply*,
 539                                             unsigned long))
 540 {
 541         struct qeth_ipa_cmd *cmd;
 542         struct qeth_cmd_buffer *iob;
 543
 544         QETH_CARD_TEXT(card, 2, "L2sdmac");
 545         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 546         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 547         cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
 548         memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
 549         return qeth_send_ipa_cmd(card, iob, reply_cb, NULL);
 550 }
 551
 552 static int qeth_l2_send_setmac_cb(struct qeth_card *card,
 553                            struct qeth_reply *reply,
 554                            unsigned long data)
 555 {
 556         struct qeth_ipa_cmd *cmd;
 557
 558         QETH_CARD_TEXT(card, 2, "L2Smaccb");
 559         cmd = (struct qeth_ipa_cmd *) data;
 560         if (cmd->hdr.return_code) {
 561                 QETH_CARD_TEXT_(card, 2, "L2er%x", cmd->hdr.return_code);
 562                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 563                 switch (cmd->hdr.return_code) {
 564                 case IPA_RC_L2_DUP_MAC:
 565                 case IPA_RC_L2_DUP_LAYER3_MAC:
 566                         dev_warn(&card->gdev->dev,
 567                                 "MAC address %pM already exists\n",
 568                                 cmd->data.setdelmac.mac);
 569                         break;
 570                 case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
 571                 case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
 572                         dev_warn(&card->gdev->dev,
 573                                 "MAC address %pM is not authorized\n",
 574                                 cmd->data.setdelmac.mac);
 575                         break;
 576                 default:
 577                         break;
 578                 }
 579         } else {
 580                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 581                 memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
 582                        OSA_ADDR_LEN);
 583                 dev_info(&card->gdev->dev,
 584                         "MAC address %pM successfully registered on device %s\n",
 585                         card->dev->dev_addr, card->dev->name);
 586         }
 587         return 0;
 588 }
 589
 590 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
 591 {
 592         QETH_CARD_TEXT(card, 2, "L2Setmac");
 593         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
 594                                           qeth_l2_send_setmac_cb);
 595 }
 596
 597 static int qeth_l2_send_delmac_cb(struct qeth_card *card,
 598                            struct qeth_reply *reply,
 599                            unsigned long data)
 600 {
 601         struct qeth_ipa_cmd *cmd;
 602
 603         QETH_CARD_TEXT(card, 2, "L2Dmaccb");
 604         cmd = (struct qeth_ipa_cmd *) data;
 605         if (cmd->hdr.return_code) {
 606                 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code);
 607                 return 0;
 608         }
 609         card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 610
 611         return 0;
 612 }
 613
 614 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
 615 {
 616         QETH_CARD_TEXT(card, 2, "L2Delmac");
 617         if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
 618                 return 0;
 619         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
 620                                           qeth_l2_send_delmac_cb);
 621 }
 622
 623 static int qeth_l2_request_initial_mac(struct qeth_card *card)
 624 {
 625         int rc = 0;
 626         char vendor_pre[] = {0x02, 0x00, 0x00};
 627
 628         QETH_DBF_TEXT(SETUP, 2, "doL2init");
 629         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
 630
 631         if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
 632                 rc = qeth_query_setadapterparms(card);
 633                 if (rc) {
 634                         QETH_DBF_MESSAGE(2, "could not query adapter "
 635                                 "parameters on device %s: x%x\n",
 636                                 CARD_BUS_ID(card), rc);
 637                 }
 638         }
 639
 640         if (card->info.type == QETH_CARD_TYPE_IQD ||
 641             card->info.type == QETH_CARD_TYPE_OSM ||
 642             card->info.type == QETH_CARD_TYPE_OSX ||
 643             card->info.guestlan) {
 644                 rc = qeth_setadpparms_change_macaddr(card);
 645                 if (rc) {
 646                         QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
 647                                 "device %s: x%x\n", CARD_BUS_ID(card), rc);
 648                         QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 649                         return rc;
 650                 }
 651                 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN);
 652         } else {
 653                 eth_random_addr(card->dev->dev_addr);
 654                 memcpy(card->dev->dev_addr, vendor_pre, 3);
 655         }
 656         return 0;
 657 }
 658
 659 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 660 {
 661         struct sockaddr *addr = p;
 662         struct qeth_card *card = dev->ml_priv;
 663         int rc = 0;
 664
 665         QETH_CARD_TEXT(card, 3, "setmac");
 666
 667         if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
 668                 QETH_CARD_TEXT(card, 3, "setmcINV");
 669                 return -EOPNOTSUPP;
 670         }
 671
 672         if (card->info.type == QETH_CARD_TYPE_OSN ||
 673             card->info.type == QETH_CARD_TYPE_OSM ||
 674             card->info.type == QETH_CARD_TYPE_OSX) {
 675                 QETH_CARD_TEXT(card, 3, "setmcTYP");
 676                 return -EOPNOTSUPP;
 677         }
 678         QETH_CARD_HEX(card, 3, addr->sa_data, OSA_ADDR_LEN);
 679         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 680                 QETH_CARD_TEXT(card, 3, "setmcREC");
 681                 return -ERESTARTSYS;
 682         }
 683         rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
 684         if (!rc || (rc == IPA_RC_L2_MAC_NOT_FOUND))
 685                 rc = qeth_l2_send_setmac(card, addr->sa_data);
 686         return rc ? -EINVAL : 0;
 687 }
 688
 689 static void qeth_l2_set_multicast_list(struct net_device *dev)
 690 {
 691         struct qeth_card *card = dev->ml_priv;
 692         struct netdev_hw_addr *ha;
 693
 694         if (card->info.type == QETH_CARD_TYPE_OSN)
 695                 return ;
 696
 697         QETH_CARD_TEXT(card, 3, "setmulti");
 698         if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
 699             (card->state != CARD_STATE_UP))
 700                 return;
 701         qeth_l2_del_all_mc(card, 1);
 702         spin_lock_bh(&card->mclock);
 703         netdev_for_each_mc_addr(ha, dev)
 704                 qeth_l2_add_mc(card, ha->addr, 0);
 705
 706         netdev_for_each_uc_addr(ha, dev)
 707                 qeth_l2_add_mc(card, ha->addr, 1);
 708
 709         spin_unlock_bh(&card->mclock);
 710         if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
 711                 return;
 712         qeth_setadp_promisc_mode(card);
 713 }
 714
 715 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 716 {
 717         int rc;
 718         struct qeth_hdr *hdr = NULL;
 719         int elements = 0;
 720         struct qeth_card *card = dev->ml_priv;
 721         struct sk_buff *new_skb = skb;
 722         int ipv = qeth_get_ip_version(skb);
 723         int cast_type = qeth_l2_get_cast_type(card, skb);
 724         struct qeth_qdio_out_q *queue = card->qdio.out_qs
 725                 [qeth_get_priority_queue(card, skb, ipv, cast_type)];
 726         int tx_bytes = skb->len;
 727         int data_offset = -1;
 728         int elements_needed = 0;
 729         int hd_len = 0;
 730
 731         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
 732                 card->stats.tx_carrier_errors++;
 733                 goto tx_drop;
 734         }
 735
 736         if ((card->info.type == QETH_CARD_TYPE_OSN) &&
 737             (skb->protocol == htons(ETH_P_IPV6)))
 738                 goto tx_drop;
 739
 740         if (card->options.performance_stats) {
 741                 card->perf_stats.outbound_cnt++;
 742                 card->perf_stats.outbound_start_time = qeth_get_micros();
 743         }
 744         netif_stop_queue(dev);
 745
 746         if (card->info.type == QETH_CARD_TYPE_OSN)
 747                 hdr = (struct qeth_hdr *)skb->data;
 748         else {
 749                 if (card->info.type == QETH_CARD_TYPE_IQD) {
 750                         new_skb = skb;
 751                         data_offset = ETH_HLEN;
 752                         hd_len = ETH_HLEN;
 753                         hdr = kmem_cache_alloc(qeth_core_header_cache,
 754                                                 GFP_ATOMIC);
 755                         if (!hdr)
 756                                 goto tx_drop;
 757                         elements_needed++;
 758                         skb_reset_mac_header(new_skb);
 759                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 760                         hdr->hdr.l2.pkt_length = new_skb->len;
 761                         memcpy(((char *)hdr) + sizeof(struct qeth_hdr),
 762                                 skb_mac_header(new_skb), ETH_HLEN);
 763                 } else {
 764                         /* create a clone with writeable headroom */
 765                         new_skb = skb_realloc_headroom(skb,
 766                                                 sizeof(struct qeth_hdr));
 767                         if (!new_skb)
 768                                 goto tx_drop;
 769                         hdr = (struct qeth_hdr *)skb_push(new_skb,
 770                                                 sizeof(struct qeth_hdr));
 771                         skb_set_mac_header(new_skb, sizeof(struct qeth_hdr));
 772                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 773                 }
 774         }
 775
 776         elements = qeth_get_elements_no(card, new_skb, elements_needed);
 777         if (!elements) {
 778                 if (data_offset >= 0)
 779                         kmem_cache_free(qeth_core_header_cache, hdr);
 780                 goto tx_drop;
 781         }
 782
 783         if (card->info.type != QETH_CARD_TYPE_IQD) {
 784                 if (qeth_hdr_chk_and_bounce(new_skb, &hdr,
 785                     sizeof(struct qeth_hdr_layer2)))
 786                         goto tx_drop;
 787                 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
 788                                          elements);
 789         } else
 790                 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
 791                                         elements, data_offset, hd_len);
 792         if (!rc) {
 793                 card->stats.tx_packets++;
 794                 card->stats.tx_bytes += tx_bytes;
 795                 if (new_skb != skb)
 796                         dev_kfree_skb_any(skb);
 797                 rc = NETDEV_TX_OK;
 798         } else {
 799                 if (data_offset >= 0)
 800                         kmem_cache_free(qeth_core_header_cache, hdr);
 801
 802                 if (rc == -EBUSY) {
 803                         if (new_skb != skb)
 804                                 dev_kfree_skb_any(new_skb);
 805                         return NETDEV_TX_BUSY;
 806                 } else
 807                         goto tx_drop;
 808         }
 809
 810         netif_wake_queue(dev);
 811         if (card->options.performance_stats)
 812                 card->perf_stats.outbound_time += qeth_get_micros() -
 813                         card->perf_stats.outbound_start_time;
 814         return rc;
 815
 816 tx_drop:
 817         card->stats.tx_dropped++;
 818         card->stats.tx_errors++;
 819         if ((new_skb != skb) && new_skb)
 820                 dev_kfree_skb_any(new_skb);
 821         dev_kfree_skb_any(skb);
 822         netif_wake_queue(dev);
 823         return NETDEV_TX_OK;
 824 }
 825
 826 static int __qeth_l2_open(struct net_device *dev)
 827 {
 828         struct qeth_card *card = dev->ml_priv;
 829         int rc = 0;
 830
 831         QETH_CARD_TEXT(card, 4, "qethopen");
 832         if (card->state == CARD_STATE_UP)
 833                 return rc;
 834         if (card->state != CARD_STATE_SOFTSETUP)
 835                 return -ENODEV;
 836
 837         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
 838              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
 839                 QETH_CARD_TEXT(card, 4, "nomacadr");
 840                 return -EPERM;
 841         }
 842         card->data.state = CH_STATE_UP;
 843         card->state = CARD_STATE_UP;
 844         netif_start_queue(dev);
 845
 846         if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) {
 847                 napi_enable(&card->napi);
 848                 napi_schedule(&card->napi);
 849         } else
 850                 rc = -EIO;
 851         return rc;
 852 }
 853
 854 static int qeth_l2_open(struct net_device *dev)
 855 {
 856         struct qeth_card *card = dev->ml_priv;
 857
 858         QETH_CARD_TEXT(card, 5, "qethope_");
 859         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 860                 QETH_CARD_TEXT(card, 3, "openREC");
 861                 return -ERESTARTSYS;
 862         }
 863         return __qeth_l2_open(dev);
 864 }
 865
 866 static int qeth_l2_stop(struct net_device *dev)
 867 {
 868         struct qeth_card *card = dev->ml_priv;
 869
 870         QETH_CARD_TEXT(card, 4, "qethstop");
 871         netif_tx_disable(dev);
 872         if (card->state == CARD_STATE_UP) {
 873                 card->state = CARD_STATE_SOFTSETUP;
 874                 napi_disable(&card->napi);
 875         }
 876         return 0;
 877 }
 878
 879 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 880 {
 881         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 882
 883         INIT_LIST_HEAD(&card->vid_list);
 884         INIT_LIST_HEAD(&card->mc_list);
 885         card->options.layer2 = 1;
 886         card->info.hwtrap = 0;
 887         return 0;
 888 }
 889
 890 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
 891 {
 892         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
 893
 894         qeth_set_allowed_threads(card, 0, 1);
 895         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 896
 897         if (cgdev->state == CCWGROUP_ONLINE)
 898                 qeth_l2_set_offline(cgdev);
 899
 900         if (card->dev) {
 901                 unregister_netdev(card->dev);
 902                 card->dev = NULL;
 903         }
 904         return;
 905 }
 906
 907 static const struct ethtool_ops qeth_l2_ethtool_ops = {
 908         .get_link = ethtool_op_get_link,
 909         .get_strings = qeth_core_get_strings,
 910         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 911         .get_sset_count = qeth_core_get_sset_count,
 912         .get_drvinfo = qeth_core_get_drvinfo,
 913         .get_settings = qeth_core_ethtool_get_settings,
 914 };
 915
 916 static const struct ethtool_ops qeth_l2_osn_ops = {
 917         .get_strings = qeth_core_get_strings,
 918         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 919         .get_sset_count = qeth_core_get_sset_count,
 920         .get_drvinfo = qeth_core_get_drvinfo,
 921 };
 922
 923 static const struct net_device_ops qeth_l2_netdev_ops = {
 924         .ndo_open               = qeth_l2_open,
 925         .ndo_stop               = qeth_l2_stop,
 926         .ndo_get_stats          = qeth_get_stats,
 927         .ndo_start_xmit         = qeth_l2_hard_start_xmit,
 928         .ndo_validate_addr      = eth_validate_addr,
 929         .ndo_set_rx_mode        = qeth_l2_set_multicast_list,
 930         .ndo_do_ioctl           = qeth_l2_do_ioctl,
 931         .ndo_set_mac_address    = qeth_l2_set_mac_address,
 932         .ndo_change_mtu         = qeth_change_mtu,
 933         .ndo_vlan_rx_add_vid    = qeth_l2_vlan_rx_add_vid,
 934         .ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,
 935         .ndo_tx_timeout         = qeth_tx_timeout,
 936 };
 937
 938 static int qeth_l2_setup_netdev(struct qeth_card *card)
 939 {
 940         switch (card->info.type) {
 941         case QETH_CARD_TYPE_IQD:
 942                 card->dev = alloc_netdev(0, "hsi%d", ether_setup);
 943                 break;
 944         case QETH_CARD_TYPE_OSN:
 945                 card->dev = alloc_netdev(0, "osn%d", ether_setup);
 946                 card->dev->flags |= IFF_NOARP;
 947                 break;
 948         default:
 949                 card->dev = alloc_etherdev(0);
 950         }
 951
 952         if (!card->dev)
 953                 return -ENODEV;
 954
 955         card->dev->ml_priv = card;
 956         card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
 957         card->dev->mtu = card->info.initial_mtu;
 958         card->dev->netdev_ops = &qeth_l2_netdev_ops;
 959         if (card->info.type != QETH_CARD_TYPE_OSN)
 960                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops);
 961         else
 962                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops);
 963         card->dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
 964         card->info.broadcast_capable = 1;
 965         qeth_l2_request_initial_mac(card);
 966         SET_NETDEV_DEV(card->dev, &card->gdev->dev);
 967         netif_napi_add(card->dev, &card->napi, qeth_l2_poll, QETH_NAPI_WEIGHT);
 968         return register_netdev(card->dev);
 969 }
 970
 971 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 972 {
 973         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 974         int rc = 0;
 975         enum qeth_card_states recover_flag;
 976
 977         mutex_lock(&card->discipline_mutex);
 978         mutex_lock(&card->conf_mutex);
 979         QETH_DBF_TEXT(SETUP, 2, "setonlin");
 980         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 981
 982         recover_flag = card->state;
 983         rc = qeth_core_hardsetup_card(card);
 984         if (rc) {
 985                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
 986                 rc = -ENODEV;
 987                 goto out_remove;
 988         }
 989         qeth_trace_features(card);
 990
 991         if (!card->dev && qeth_l2_setup_netdev(card)) {
 992                 rc = -ENODEV;
 993                 goto out_remove;
 994         }
 995
 996         if (card->info.type != QETH_CARD_TYPE_OSN)
 997                 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
 998
 999         if (qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP)) {
1000                 if (card->info.hwtrap &&
1001                     qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM))
1002                         card->info.hwtrap = 0;
1003         } else
1004                 card->info.hwtrap = 0;
1005
1006         card->state = CARD_STATE_HARDSETUP;
1007         memset(&card->rx, 0, sizeof(struct qeth_rx));
1008         qeth_print_status_message(card);
1009
1010         /* softsetup */
1011         QETH_DBF_TEXT(SETUP, 2, "softsetp");
1012
1013         rc = qeth_send_startlan(card);
1014         if (rc) {
1015                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1016                 if (rc == 0xe080) {
1017                         dev_warn(&card->gdev->dev,
1018                                 "The LAN is offline\n");
1019                         card->lan_online = 0;
1020                         goto contin;
1021                 }
1022                 rc = -ENODEV;
1023                 goto out_remove;
1024         } else
1025                 card->lan_online = 1;
1026
1027 contin:
1028         if ((card->info.type == QETH_CARD_TYPE_OSD) ||
1029             (card->info.type == QETH_CARD_TYPE_OSX)) {
1030                 /* configure isolation level */
1031                 rc = qeth_set_access_ctrl_online(card, 0);
1032                 if (rc) {
1033                         rc = -ENODEV;
1034                         goto out_remove;
1035                 }
1036         }
1037
1038         if (card->info.type != QETH_CARD_TYPE_OSN &&
1039             card->info.type != QETH_CARD_TYPE_OSM)
1040                 qeth_l2_process_vlans(card);
1041
1042         netif_tx_disable(card->dev);
1043
1044         rc = qeth_init_qdio_queues(card);
1045         if (rc) {
1046                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1047                 rc = -ENODEV;
1048                 goto out_remove;
1049         }
1050         card->state = CARD_STATE_SOFTSETUP;
1051         if (card->lan_online)
1052                 netif_carrier_on(card->dev);
1053         else
1054                 netif_carrier_off(card->dev);
1055
1056         qeth_set_allowed_threads(card, 0xffffffff, 0);
1057         if (recover_flag == CARD_STATE_RECOVER) {
1058                 if (recovery_mode &&
1059                     card->info.type != QETH_CARD_TYPE_OSN) {
1060                         __qeth_l2_open(card->dev);
1061                 } else {
1062                         rtnl_lock();
1063                         dev_open(card->dev);
1064                         rtnl_unlock();
1065                 }
1066                 /* this also sets saved unicast addresses */
1067                 qeth_l2_set_multicast_list(card->dev);
1068         }
1069         /* let user_space know that device is online */
1070         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1071         mutex_unlock(&card->conf_mutex);
1072         mutex_unlock(&card->discipline_mutex);
1073         return 0;
1074
1075 out_remove:
1076         qeth_l2_stop_card(card, 0);
1077         ccw_device_set_offline(CARD_DDEV(card));
1078         ccw_device_set_offline(CARD_WDEV(card));
1079         ccw_device_set_offline(CARD_RDEV(card));
1080         if (recover_flag == CARD_STATE_RECOVER)
1081                 card->state = CARD_STATE_RECOVER;
1082         else
1083                 card->state = CARD_STATE_DOWN;
1084         mutex_unlock(&card->conf_mutex);
1085         mutex_unlock(&card->discipline_mutex);
1086         return rc;
1087 }
1088
1089 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1090 {
1091         return __qeth_l2_set_online(gdev, 0);
1092 }
1093
1094 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1095                                         int recovery_mode)
1096 {
1097         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1098         int rc = 0, rc2 = 0, rc3 = 0;
1099         enum qeth_card_states recover_flag;
1100
1101         mutex_lock(&card->discipline_mutex);
1102         mutex_lock(&card->conf_mutex);
1103         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1104         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1105
1106         if (card->dev && netif_carrier_ok(card->dev))
1107                 netif_carrier_off(card->dev);
1108         recover_flag = card->state;
1109         if ((!recovery_mode && card->info.hwtrap) || card->info.hwtrap == 2) {
1110                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1111                 card->info.hwtrap = 1;
1112         }
1113         qeth_l2_stop_card(card, recovery_mode);
1114         rc  = ccw_device_set_offline(CARD_DDEV(card));
1115         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1116         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1117         if (!rc)
1118                 rc = (rc2) ? rc2 : rc3;
1119         if (rc)
1120                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1121         if (recover_flag == CARD_STATE_UP)
1122                 card->state = CARD_STATE_RECOVER;
1123         /* let user_space know that device is offline */
1124         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1125         mutex_unlock(&card->conf_mutex);
1126         mutex_unlock(&card->discipline_mutex);
1127         return 0;
1128 }
1129
1130 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1131 {
1132         return __qeth_l2_set_offline(cgdev, 0);
1133 }
1134
1135 static int qeth_l2_recover(void *ptr)
1136 {
1137         struct qeth_card *card;
1138         int rc = 0;
1139
1140         card = (struct qeth_card *) ptr;
1141         QETH_CARD_TEXT(card, 2, "recover1");
1142         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1143                 return 0;
1144         QETH_CARD_TEXT(card, 2, "recover2");
1145         dev_warn(&card->gdev->dev,
1146                 "A recovery process has been started for the device\n");
1147         qeth_set_recovery_task(card);
1148         __qeth_l2_set_offline(card->gdev, 1);
1149         rc = __qeth_l2_set_online(card->gdev, 1);
1150         if (!rc)
1151                 dev_info(&card->gdev->dev,
1152                         "Device successfully recovered!\n");
1153         else {
1154                 qeth_close_dev(card);
1155                 dev_warn(&card->gdev->dev, "The qeth device driver "
1156                                 "failed to recover an error on the device\n");
1157         }
1158         qeth_clear_recovery_task(card);
1159         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1160         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1161         return 0;
1162 }
1163
1164 static int __init qeth_l2_init(void)
1165 {
1166         pr_info("register layer 2 discipline\n");
1167         return 0;
1168 }
1169
1170 static void __exit qeth_l2_exit(void)
1171 {
1172         pr_info("unregister layer 2 discipline\n");
1173 }
1174
1175 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1176 {
1177         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1178         qeth_set_allowed_threads(card, 0, 1);
1179         if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
1180                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1181         qeth_qdio_clear_card(card, 0);
1182         qeth_clear_qdio_buffers(card);
1183 }
1184
1185 static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev)
1186 {
1187         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1188
1189         if (card->dev)
1190                 netif_device_detach(card->dev);
1191         qeth_set_allowed_threads(card, 0, 1);
1192         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1193         if (gdev->state == CCWGROUP_OFFLINE)
1194                 return 0;
1195         if (card->state == CARD_STATE_UP) {
1196                 if (card->info.hwtrap)
1197                         qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1198                 __qeth_l2_set_offline(card->gdev, 1);
1199         } else
1200                 __qeth_l2_set_offline(card->gdev, 0);
1201         return 0;
1202 }
1203
1204 static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
1205 {
1206         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1207         int rc = 0;
1208
1209         if (gdev->state == CCWGROUP_OFFLINE)
1210                 goto out;
1211
1212         if (card->state == CARD_STATE_RECOVER) {
1213                 rc = __qeth_l2_set_online(card->gdev, 1);
1214                 if (rc) {
1215                         rtnl_lock();
1216                         dev_close(card->dev);
1217                         rtnl_unlock();
1218                 }
1219         } else
1220                 rc = __qeth_l2_set_online(card->gdev, 0);
1221 out:
1222         qeth_set_allowed_threads(card, 0xffffffff, 0);
1223         if (card->dev)
1224                 netif_device_attach(card->dev);
1225         if (rc)
1226                 dev_warn(&card->gdev->dev, "The qeth device driver "
1227                         "failed to recover an error on the device\n");
1228         return rc;
1229 }
1230
1231 struct qeth_discipline qeth_l2_discipline = {
1232         .start_poll = qeth_qdio_start_poll,
1233         .input_handler = (qdio_handler_t *) qeth_qdio_input_handler,
1234         .output_handler = (qdio_handler_t *) qeth_qdio_output_handler,
1235         .recover = qeth_l2_recover,
1236         .setup = qeth_l2_probe_device,
1237         .remove = qeth_l2_remove_device,
1238         .set_online = qeth_l2_set_online,
1239         .set_offline = qeth_l2_set_offline,
1240         .shutdown = qeth_l2_shutdown,
1241         .freeze = qeth_l2_pm_suspend,
1242         .thaw = qeth_l2_pm_resume,
1243         .restore = qeth_l2_pm_resume,
1244 };
1245 EXPORT_SYMBOL_GPL(qeth_l2_discipline);
1246
1247 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1248                            struct qeth_cmd_buffer *iob)
1249 {
1250         unsigned long flags;
1251         int rc = 0;
1252
1253         QETH_CARD_TEXT(card, 5, "osndctrd");
1254
1255         wait_event(card->wait_q,
1256                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1257         qeth_prepare_control_data(card, len, iob);
1258         QETH_CARD_TEXT(card, 6, "osnoirqp");
1259         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1260         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1261                               (addr_t) iob, 0, 0);
1262         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1263         if (rc) {
1264                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1265                            "ccw_device_start rc = %i\n", rc);
1266                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1267                 qeth_release_buffer(iob->channel, iob);
1268                 atomic_set(&card->write.irq_pending, 0);
1269                 wake_up(&card->wait_q);
1270         }
1271         return rc;
1272 }
1273
1274 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1275                         struct qeth_cmd_buffer *iob, int data_len)
1276 {
1277         u16 s1, s2;
1278
1279         QETH_CARD_TEXT(card, 4, "osndipa");
1280
1281         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1282         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1283         s2 = (u16)data_len;
1284         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1285         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1286         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1287         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1288         return qeth_osn_send_control_data(card, s1, iob);
1289 }
1290
1291 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1292 {
1293         struct qeth_cmd_buffer *iob;
1294         struct qeth_card *card;
1295         int rc;
1296
1297         if (!dev)
1298                 return -ENODEV;
1299         card = dev->ml_priv;
1300         if (!card)
1301                 return -ENODEV;
1302         QETH_CARD_TEXT(card, 2, "osnsdmc");
1303         if ((card->state != CARD_STATE_UP) &&
1304             (card->state != CARD_STATE_SOFTSETUP))
1305                 return -ENODEV;
1306         iob = qeth_wait_for_buffer(&card->write);
1307         memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1308         rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1309         return rc;
1310 }
1311 EXPORT_SYMBOL(qeth_osn_assist);
1312
1313 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1314                   int (*assist_cb)(struct net_device *, void *),
1315                   int (*data_cb)(struct sk_buff *))
1316 {
1317         struct qeth_card *card;
1318
1319         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1320         if (*dev == NULL)
1321                 return -ENODEV;
1322         card = (*dev)->ml_priv;
1323         if (!card)
1324                 return -ENODEV;
1325         QETH_CARD_TEXT(card, 2, "osnreg");
1326         if ((assist_cb == NULL) || (data_cb == NULL))
1327                 return -EINVAL;
1328         card->osn_info.assist_cb = assist_cb;
1329         card->osn_info.data_cb = data_cb;
1330         return 0;
1331 }
1332 EXPORT_SYMBOL(qeth_osn_register);
1333
1334 void qeth_osn_deregister(struct net_device *dev)
1335 {
1336         struct qeth_card *card;
1337
1338         if (!dev)
1339                 return;
1340         card = dev->ml_priv;
1341         if (!card)
1342                 return;
1343         QETH_CARD_TEXT(card, 2, "osndereg");
1344         card->osn_info.assist_cb = NULL;
1345         card->osn_info.data_cb = NULL;
1346         return;
1347 }
1348 EXPORT_SYMBOL(qeth_osn_deregister);
1349
1350 module_init(qeth_l2_init);
1351 module_exit(qeth_l2_exit);
1352 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1353 MODULE_DESCRIPTION("qeth layer 2 discipline");
1354 MODULE_LICENSE("GPL");