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, unsigned short vid)
 306 {
 307         struct qeth_card *card = dev->ml_priv;
 308         struct qeth_vlan_vid *id;
 309
 310         QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
 311         if (!vid)
 312                 return 0;
 313         if (card->info.type == QETH_CARD_TYPE_OSM) {
 314                 QETH_CARD_TEXT(card, 3, "aidOSM");
 315                 return 0;
 316         }
 317         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 318                 QETH_CARD_TEXT(card, 3, "aidREC");
 319                 return 0;
 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         } else {
 329                 return -ENOMEM;
 330         }
 331         return 0;
 332 }
 333
 334 static int qeth_l2_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
 335 {
 336         struct qeth_vlan_vid *id, *tmpid = NULL;
 337         struct qeth_card *card = dev->ml_priv;
 338
 339         QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
 340         if (card->info.type == QETH_CARD_TYPE_OSM) {
 341                 QETH_CARD_TEXT(card, 3, "kidOSM");
 342                 return 0;
 343         }
 344         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 345                 QETH_CARD_TEXT(card, 3, "kidREC");
 346                 return 0;
 347         }
 348         spin_lock_bh(&card->vlanlock);
 349         list_for_each_entry(id, &card->vid_list, list) {
 350                 if (id->vid == vid) {
 351                         list_del(&id->list);
 352                         tmpid = id;
 353                         break;
 354                 }
 355         }
 356         spin_unlock_bh(&card->vlanlock);
 357         if (tmpid) {
 358                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 359                 kfree(tmpid);
 360         }
 361         qeth_l2_set_multicast_list(card->dev);
 362         return 0;
 363 }
 364
 365 static int qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
 366 {
 367         int rc = 0;
 368
 369         QETH_DBF_TEXT(SETUP , 2, "stopcard");
 370         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 371
 372         qeth_set_allowed_threads(card, 0, 1);
 373         if (card->read.state == CH_STATE_UP &&
 374             card->write.state == CH_STATE_UP &&
 375             (card->state == CARD_STATE_UP)) {
 376                 if (recovery_mode &&
 377                     card->info.type != QETH_CARD_TYPE_OSN) {
 378                         qeth_l2_stop(card->dev);
 379                 } else {
 380                         rtnl_lock();
 381                         dev_close(card->dev);
 382                         rtnl_unlock();
 383                 }
 384                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 385                 card->state = CARD_STATE_SOFTSETUP;
 386         }
 387         if (card->state == CARD_STATE_SOFTSETUP) {
 388                 qeth_l2_del_all_mc(card, 0);
 389                 qeth_clear_ipacmd_list(card);
 390                 card->state = CARD_STATE_HARDSETUP;
 391         }
 392         if (card->state == CARD_STATE_HARDSETUP) {
 393                 qeth_qdio_clear_card(card, 0);
 394                 qeth_clear_qdio_buffers(card);
 395                 qeth_clear_working_pool_list(card);
 396                 card->state = CARD_STATE_DOWN;
 397         }
 398         if (card->state == CARD_STATE_DOWN) {
 399                 qeth_clear_cmd_buffers(&card->read);
 400                 qeth_clear_cmd_buffers(&card->write);
 401         }
 402         return rc;
 403 }
 404
 405 static int qeth_l2_process_inbound_buffer(struct qeth_card *card,
 406                                 int budget, int *done)
 407 {
 408         int work_done = 0;
 409         struct sk_buff *skb;
 410         struct qeth_hdr *hdr;
 411         unsigned int len;
 412
 413         *done = 0;
 414         BUG_ON(!budget);
 415         while (budget) {
 416                 skb = qeth_core_get_next_skb(card,
 417                         &card->qdio.in_q->bufs[card->rx.b_index],
 418                         &card->rx.b_element, &card->rx.e_offset, &hdr);
 419                 if (!skb) {
 420                         *done = 1;
 421                         break;
 422                 }
 423                 skb->dev = card->dev;
 424                 switch (hdr->hdr.l2.id) {
 425                 case QETH_HEADER_TYPE_LAYER2:
 426                         skb->pkt_type = PACKET_HOST;
 427                         skb->protocol = eth_type_trans(skb, skb->dev);
 428                         skb->ip_summed = CHECKSUM_NONE;
 429                         if (skb->protocol == htons(ETH_P_802_2))
 430                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
 431                         len = skb->len;
 432                         netif_receive_skb(skb);
 433                         break;
 434                 case QETH_HEADER_TYPE_OSN:
 435                         if (card->info.type == QETH_CARD_TYPE_OSN) {
 436                                 skb_push(skb, sizeof(struct qeth_hdr));
 437                                 skb_copy_to_linear_data(skb, hdr,
 438                                                 sizeof(struct qeth_hdr));
 439                                 len = skb->len;
 440                                 card->osn_info.data_cb(skb);
 441                                 break;
 442                         }
 443                         /* else unknown */
 444                 default:
 445                         dev_kfree_skb_any(skb);
 446                         QETH_CARD_TEXT(card, 3, "inbunkno");
 447                         QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
 448                         continue;
 449                 }
 450                 work_done++;
 451                 budget--;
 452                 card->stats.rx_packets++;
 453                 card->stats.rx_bytes += len;
 454         }
 455         return work_done;
 456 }
 457
 458 static int qeth_l2_poll(struct napi_struct *napi, int budget)
 459 {
 460         struct qeth_card *card = container_of(napi, struct qeth_card, napi);
 461         int work_done = 0;
 462         struct qeth_qdio_buffer *buffer;
 463         int done;
 464         int new_budget = budget;
 465
 466         if (card->options.performance_stats) {
 467                 card->perf_stats.inbound_cnt++;
 468                 card->perf_stats.inbound_start_time = qeth_get_micros();
 469         }
 470
 471         while (1) {
 472                 if (!card->rx.b_count) {
 473                         card->rx.qdio_err = 0;
 474                         card->rx.b_count = qdio_get_next_buffers(
 475                                 card->data.ccwdev, 0, &card->rx.b_index,
 476                                 &card->rx.qdio_err);
 477                         if (card->rx.b_count <= 0) {
 478                                 card->rx.b_count = 0;
 479                                 break;
 480                         }
 481                         card->rx.b_element =
 482                                 &card->qdio.in_q->bufs[card->rx.b_index]
 483                                 .buffer->element[0];
 484                         card->rx.e_offset = 0;
 485                 }
 486
 487                 while (card->rx.b_count) {
 488                         buffer = &card->qdio.in_q->bufs[card->rx.b_index];
 489                         if (!(card->rx.qdio_err &&
 490                             qeth_check_qdio_errors(card, buffer->buffer,
 491                             card->rx.qdio_err, "qinerr")))
 492                                 work_done += qeth_l2_process_inbound_buffer(
 493                                         card, new_budget, &done);
 494                         else
 495                                 done = 1;
 496
 497                         if (done) {
 498                                 if (card->options.performance_stats)
 499                                         card->perf_stats.bufs_rec++;
 500                                 qeth_put_buffer_pool_entry(card,
 501                                         buffer->pool_entry);
 502                                 qeth_queue_input_buffer(card, card->rx.b_index);
 503                                 card->rx.b_count--;
 504                                 if (card->rx.b_count) {
 505                                         card->rx.b_index =
 506                                                 (card->rx.b_index + 1) %
 507                                                 QDIO_MAX_BUFFERS_PER_Q;
 508                                         card->rx.b_element =
 509                                                 &card->qdio.in_q
 510                                                 ->bufs[card->rx.b_index]
 511                                                 .buffer->element[0];
 512                                         card->rx.e_offset = 0;
 513                                 }
 514                         }
 515
 516                         if (work_done >= budget)
 517                                 goto out;
 518                         else
 519                                 new_budget = budget - work_done;
 520                 }
 521         }
 522
 523         napi_complete(napi);
 524         if (qdio_start_irq(card->data.ccwdev, 0))
 525                 napi_schedule(&card->napi);
 526 out:
 527         if (card->options.performance_stats)
 528                 card->perf_stats.inbound_time += qeth_get_micros() -
 529                         card->perf_stats.inbound_start_time;
 530         return work_done;
 531 }
 532
 533 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
 534                            enum qeth_ipa_cmds ipacmd,
 535                            int (*reply_cb) (struct qeth_card *,
 536                                             struct qeth_reply*,
 537                                             unsigned long))
 538 {
 539         struct qeth_ipa_cmd *cmd;
 540         struct qeth_cmd_buffer *iob;
 541
 542         QETH_CARD_TEXT(card, 2, "L2sdmac");
 543         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 544         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 545         cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
 546         memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
 547         return qeth_send_ipa_cmd(card, iob, reply_cb, NULL);
 548 }
 549
 550 static int qeth_l2_send_setmac_cb(struct qeth_card *card,
 551                            struct qeth_reply *reply,
 552                            unsigned long data)
 553 {
 554         struct qeth_ipa_cmd *cmd;
 555
 556         QETH_CARD_TEXT(card, 2, "L2Smaccb");
 557         cmd = (struct qeth_ipa_cmd *) data;
 558         if (cmd->hdr.return_code) {
 559                 QETH_CARD_TEXT_(card, 2, "L2er%x", cmd->hdr.return_code);
 560                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 561                 switch (cmd->hdr.return_code) {
 562                 case IPA_RC_L2_DUP_MAC:
 563                 case IPA_RC_L2_DUP_LAYER3_MAC:
 564                         dev_warn(&card->gdev->dev,
 565                                 "MAC address %pM already exists\n",
 566                                 cmd->data.setdelmac.mac);
 567                         break;
 568                 case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
 569                 case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
 570                         dev_warn(&card->gdev->dev,
 571                                 "MAC address %pM is not authorized\n",
 572                                 cmd->data.setdelmac.mac);
 573                         break;
 574                 default:
 575                         break;
 576                 }
 577         } else {
 578                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 579                 memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
 580                        OSA_ADDR_LEN);
 581                 dev_info(&card->gdev->dev,
 582                         "MAC address %pM successfully registered on device %s\n",
 583                         card->dev->dev_addr, card->dev->name);
 584         }
 585         return 0;
 586 }
 587
 588 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
 589 {
 590         QETH_CARD_TEXT(card, 2, "L2Setmac");
 591         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
 592                                           qeth_l2_send_setmac_cb);
 593 }
 594
 595 static int qeth_l2_send_delmac_cb(struct qeth_card *card,
 596                            struct qeth_reply *reply,
 597                            unsigned long data)
 598 {
 599         struct qeth_ipa_cmd *cmd;
 600
 601         QETH_CARD_TEXT(card, 2, "L2Dmaccb");
 602         cmd = (struct qeth_ipa_cmd *) data;
 603         if (cmd->hdr.return_code) {
 604                 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code);
 605                 return 0;
 606         }
 607         card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 608
 609         return 0;
 610 }
 611
 612 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
 613 {
 614         QETH_CARD_TEXT(card, 2, "L2Delmac");
 615         if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
 616                 return 0;
 617         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
 618                                           qeth_l2_send_delmac_cb);
 619 }
 620
 621 static int qeth_l2_request_initial_mac(struct qeth_card *card)
 622 {
 623         int rc = 0;
 624         char vendor_pre[] = {0x02, 0x00, 0x00};
 625
 626         QETH_DBF_TEXT(SETUP, 2, "doL2init");
 627         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
 628
 629         if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
 630                 rc = qeth_query_setadapterparms(card);
 631                 if (rc) {
 632                         QETH_DBF_MESSAGE(2, "could not query adapter "
 633                                 "parameters on device %s: x%x\n",
 634                                 CARD_BUS_ID(card), rc);
 635                 }
 636         }
 637
 638         if (card->info.type == QETH_CARD_TYPE_IQD ||
 639             card->info.type == QETH_CARD_TYPE_OSM ||
 640             card->info.type == QETH_CARD_TYPE_OSX ||
 641             card->info.guestlan) {
 642                 rc = qeth_setadpparms_change_macaddr(card);
 643                 if (rc) {
 644                         QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
 645                                 "device %s: x%x\n", CARD_BUS_ID(card), rc);
 646                         QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 647                         return rc;
 648                 }
 649                 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN);
 650         } else {
 651                 eth_random_addr(card->dev->dev_addr);
 652                 memcpy(card->dev->dev_addr, vendor_pre, 3);
 653         }
 654         return 0;
 655 }
 656
 657 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 658 {
 659         struct sockaddr *addr = p;
 660         struct qeth_card *card = dev->ml_priv;
 661         int rc = 0;
 662
 663         QETH_CARD_TEXT(card, 3, "setmac");
 664
 665         if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
 666                 QETH_CARD_TEXT(card, 3, "setmcINV");
 667                 return -EOPNOTSUPP;
 668         }
 669
 670         if (card->info.type == QETH_CARD_TYPE_OSN ||
 671             card->info.type == QETH_CARD_TYPE_OSM ||
 672             card->info.type == QETH_CARD_TYPE_OSX) {
 673                 QETH_CARD_TEXT(card, 3, "setmcTYP");
 674                 return -EOPNOTSUPP;
 675         }
 676         QETH_CARD_HEX(card, 3, addr->sa_data, OSA_ADDR_LEN);
 677         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 678                 QETH_CARD_TEXT(card, 3, "setmcREC");
 679                 return -ERESTARTSYS;
 680         }
 681         rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
 682         if (!rc || (rc == IPA_RC_L2_MAC_NOT_FOUND))
 683                 rc = qeth_l2_send_setmac(card, addr->sa_data);
 684         return rc ? -EINVAL : 0;
 685 }
 686
 687 static void qeth_l2_set_multicast_list(struct net_device *dev)
 688 {
 689         struct qeth_card *card = dev->ml_priv;
 690         struct netdev_hw_addr *ha;
 691
 692         if (card->info.type == QETH_CARD_TYPE_OSN)
 693                 return ;
 694
 695         QETH_CARD_TEXT(card, 3, "setmulti");
 696         if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
 697             (card->state != CARD_STATE_UP))
 698                 return;
 699         qeth_l2_del_all_mc(card, 1);
 700         spin_lock_bh(&card->mclock);
 701         netdev_for_each_mc_addr(ha, dev)
 702                 qeth_l2_add_mc(card, ha->addr, 0);
 703
 704         netdev_for_each_uc_addr(ha, dev)
 705                 qeth_l2_add_mc(card, ha->addr, 1);
 706
 707         spin_unlock_bh(&card->mclock);
 708         if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
 709                 return;
 710         qeth_setadp_promisc_mode(card);
 711 }
 712
 713 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 714 {
 715         int rc;
 716         struct qeth_hdr *hdr = NULL;
 717         int elements = 0;
 718         struct qeth_card *card = dev->ml_priv;
 719         struct sk_buff *new_skb = skb;
 720         int ipv = qeth_get_ip_version(skb);
 721         int cast_type = qeth_l2_get_cast_type(card, skb);
 722         struct qeth_qdio_out_q *queue = card->qdio.out_qs
 723                 [qeth_get_priority_queue(card, skb, ipv, cast_type)];
 724         int tx_bytes = skb->len;
 725         int data_offset = -1;
 726         int elements_needed = 0;
 727         int hd_len = 0;
 728
 729         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
 730                 card->stats.tx_carrier_errors++;
 731                 goto tx_drop;
 732         }
 733
 734         if ((card->info.type == QETH_CARD_TYPE_OSN) &&
 735             (skb->protocol == htons(ETH_P_IPV6)))
 736                 goto tx_drop;
 737
 738         if (card->options.performance_stats) {
 739                 card->perf_stats.outbound_cnt++;
 740                 card->perf_stats.outbound_start_time = qeth_get_micros();
 741         }
 742         netif_stop_queue(dev);
 743
 744         if (card->info.type == QETH_CARD_TYPE_OSN)
 745                 hdr = (struct qeth_hdr *)skb->data;
 746         else {
 747                 if (card->info.type == QETH_CARD_TYPE_IQD) {
 748                         new_skb = skb;
 749                         data_offset = ETH_HLEN;
 750                         hd_len = ETH_HLEN;
 751                         hdr = kmem_cache_alloc(qeth_core_header_cache,
 752                                                 GFP_ATOMIC);
 753                         if (!hdr)
 754                                 goto tx_drop;
 755                         elements_needed++;
 756                         skb_reset_mac_header(new_skb);
 757                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 758                         hdr->hdr.l2.pkt_length = new_skb->len;
 759                         memcpy(((char *)hdr) + sizeof(struct qeth_hdr),
 760                                 skb_mac_header(new_skb), ETH_HLEN);
 761                 } else {
 762                         /* create a clone with writeable headroom */
 763                         new_skb = skb_realloc_headroom(skb,
 764                                                 sizeof(struct qeth_hdr));
 765                         if (!new_skb)
 766                                 goto tx_drop;
 767                         hdr = (struct qeth_hdr *)skb_push(new_skb,
 768                                                 sizeof(struct qeth_hdr));
 769                         skb_set_mac_header(new_skb, sizeof(struct qeth_hdr));
 770                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 771                 }
 772         }
 773
 774         elements = qeth_get_elements_no(card, (void *)hdr, new_skb,
 775                                                 elements_needed);
 776         if (!elements) {
 777                 if (data_offset >= 0)
 778                         kmem_cache_free(qeth_core_header_cache, hdr);
 779                 goto tx_drop;
 780         }
 781
 782         if (card->info.type != QETH_CARD_TYPE_IQD) {
 783                 if (qeth_hdr_chk_and_bounce(new_skb,
 784                     sizeof(struct qeth_hdr_layer2)))
 785                         goto tx_drop;
 786                 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
 787                                          elements);
 788         } else
 789                 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
 790                                         elements, data_offset, hd_len);
 791         if (!rc) {
 792                 card->stats.tx_packets++;
 793                 card->stats.tx_bytes += tx_bytes;
 794                 if (new_skb != skb)
 795                         dev_kfree_skb_any(skb);
 796                 rc = NETDEV_TX_OK;
 797         } else {
 798                 if (data_offset >= 0)
 799                         kmem_cache_free(qeth_core_header_cache, hdr);
 800
 801                 if (rc == -EBUSY) {
 802                         if (new_skb != skb)
 803                                 dev_kfree_skb_any(new_skb);
 804                         return NETDEV_TX_BUSY;
 805                 } else
 806                         goto tx_drop;
 807         }
 808
 809         netif_wake_queue(dev);
 810         if (card->options.performance_stats)
 811                 card->perf_stats.outbound_time += qeth_get_micros() -
 812                         card->perf_stats.outbound_start_time;
 813         return rc;
 814
 815 tx_drop:
 816         card->stats.tx_dropped++;
 817         card->stats.tx_errors++;
 818         if ((new_skb != skb) && new_skb)
 819                 dev_kfree_skb_any(new_skb);
 820         dev_kfree_skb_any(skb);
 821         netif_wake_queue(dev);
 822         return NETDEV_TX_OK;
 823 }
 824
 825 static int __qeth_l2_open(struct net_device *dev)
 826 {
 827         struct qeth_card *card = dev->ml_priv;
 828         int rc = 0;
 829
 830         QETH_CARD_TEXT(card, 4, "qethopen");
 831         if (card->state == CARD_STATE_UP)
 832                 return rc;
 833         if (card->state != CARD_STATE_SOFTSETUP)
 834                 return -ENODEV;
 835
 836         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
 837              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
 838                 QETH_CARD_TEXT(card, 4, "nomacadr");
 839                 return -EPERM;
 840         }
 841         card->data.state = CH_STATE_UP;
 842         card->state = CARD_STATE_UP;
 843         netif_start_queue(dev);
 844
 845         if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) {
 846                 napi_enable(&card->napi);
 847                 napi_schedule(&card->napi);
 848         } else
 849                 rc = -EIO;
 850         return rc;
 851 }
 852
 853 static int qeth_l2_open(struct net_device *dev)
 854 {
 855         struct qeth_card *card = dev->ml_priv;
 856
 857         QETH_CARD_TEXT(card, 5, "qethope_");
 858         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 859                 QETH_CARD_TEXT(card, 3, "openREC");
 860                 return -ERESTARTSYS;
 861         }
 862         return __qeth_l2_open(dev);
 863 }
 864
 865 static int qeth_l2_stop(struct net_device *dev)
 866 {
 867         struct qeth_card *card = dev->ml_priv;
 868
 869         QETH_CARD_TEXT(card, 4, "qethstop");
 870         netif_tx_disable(dev);
 871         if (card->state == CARD_STATE_UP) {
 872                 card->state = CARD_STATE_SOFTSETUP;
 873                 napi_disable(&card->napi);
 874         }
 875         return 0;
 876 }
 877
 878 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 879 {
 880         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 881
 882         INIT_LIST_HEAD(&card->vid_list);
 883         INIT_LIST_HEAD(&card->mc_list);
 884         card->options.layer2 = 1;
 885         card->info.hwtrap = 0;
 886         return 0;
 887 }
 888
 889 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
 890 {
 891         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
 892
 893         qeth_set_allowed_threads(card, 0, 1);
 894         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 895
 896         if (cgdev->state == CCWGROUP_ONLINE)
 897                 qeth_l2_set_offline(cgdev);
 898
 899         if (card->dev) {
 900                 unregister_netdev(card->dev);
 901                 card->dev = NULL;
 902         }
 903         return;
 904 }
 905
 906 static const struct ethtool_ops qeth_l2_ethtool_ops = {
 907         .get_link = ethtool_op_get_link,
 908         .get_strings = qeth_core_get_strings,
 909         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 910         .get_sset_count = qeth_core_get_sset_count,
 911         .get_drvinfo = qeth_core_get_drvinfo,
 912         .get_settings = qeth_core_ethtool_get_settings,
 913 };
 914
 915 static const struct ethtool_ops qeth_l2_osn_ops = {
 916         .get_strings = qeth_core_get_strings,
 917         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 918         .get_sset_count = qeth_core_get_sset_count,
 919         .get_drvinfo = qeth_core_get_drvinfo,
 920 };
 921
 922 static const struct net_device_ops qeth_l2_netdev_ops = {
 923         .ndo_open               = qeth_l2_open,
 924         .ndo_stop               = qeth_l2_stop,
 925         .ndo_get_stats          = qeth_get_stats,
 926         .ndo_start_xmit         = qeth_l2_hard_start_xmit,
 927         .ndo_validate_addr      = eth_validate_addr,
 928         .ndo_set_rx_mode        = qeth_l2_set_multicast_list,
 929         .ndo_do_ioctl           = qeth_l2_do_ioctl,
 930         .ndo_set_mac_address    = qeth_l2_set_mac_address,
 931         .ndo_change_mtu         = qeth_change_mtu,
 932         .ndo_vlan_rx_add_vid    = qeth_l2_vlan_rx_add_vid,
 933         .ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,
 934         .ndo_tx_timeout         = qeth_tx_timeout,
 935 };
 936
 937 static int qeth_l2_setup_netdev(struct qeth_card *card)
 938 {
 939         switch (card->info.type) {
 940         case QETH_CARD_TYPE_IQD:
 941                 card->dev = alloc_netdev(0, "hsi%d", ether_setup);
 942                 break;
 943         case QETH_CARD_TYPE_OSN:
 944                 card->dev = alloc_netdev(0, "osn%d", ether_setup);
 945                 card->dev->flags |= IFF_NOARP;
 946                 break;
 947         default:
 948                 card->dev = alloc_etherdev(0);
 949         }
 950
 951         if (!card->dev)
 952                 return -ENODEV;
 953
 954         card->dev->ml_priv = card;
 955         card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
 956         card->dev->mtu = card->info.initial_mtu;
 957         card->dev->netdev_ops = &qeth_l2_netdev_ops;
 958         if (card->info.type != QETH_CARD_TYPE_OSN)
 959                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops);
 960         else
 961                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops);
 962         card->dev->features |= NETIF_F_HW_VLAN_FILTER;
 963         card->info.broadcast_capable = 1;
 964         qeth_l2_request_initial_mac(card);
 965         SET_NETDEV_DEV(card->dev, &card->gdev->dev);
 966         netif_napi_add(card->dev, &card->napi, qeth_l2_poll, QETH_NAPI_WEIGHT);
 967         return register_netdev(card->dev);
 968 }
 969
 970 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 971 {
 972         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 973         int rc = 0;
 974         enum qeth_card_states recover_flag;
 975
 976         BUG_ON(!card);
 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
 990         if (!card->dev && qeth_l2_setup_netdev(card)) {
 991                 rc = -ENODEV;
 992                 goto out_remove;
 993         }
 994
 995         if (card->info.type != QETH_CARD_TYPE_OSN)
 996                 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
 997
 998         if (qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP)) {
 999                 if (card->info.hwtrap &&
1000                     qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM))
1001                         card->info.hwtrap = 0;
1002         } else
1003                 card->info.hwtrap = 0;
1004
1005         card->state = CARD_STATE_HARDSETUP;
1006         memset(&card->rx, 0, sizeof(struct qeth_rx));
1007         qeth_print_status_message(card);
1008
1009         /* softsetup */
1010         QETH_DBF_TEXT(SETUP, 2, "softsetp");
1011
1012         rc = qeth_send_startlan(card);
1013         if (rc) {
1014                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1015                 if (rc == 0xe080) {
1016                         dev_warn(&card->gdev->dev,
1017                                 "The LAN is offline\n");
1018                         card->lan_online = 0;
1019                         goto contin;
1020                 }
1021                 rc = -ENODEV;
1022                 goto out_remove;
1023         } else
1024                 card->lan_online = 1;
1025
1026 contin:
1027         if ((card->info.type == QETH_CARD_TYPE_OSD) ||
1028             (card->info.type == QETH_CARD_TYPE_OSX))
1029                 /* configure isolation level */
1030                 qeth_set_access_ctrl_online(card);
1031
1032         if (card->info.type != QETH_CARD_TYPE_OSN &&
1033             card->info.type != QETH_CARD_TYPE_OSM)
1034                 qeth_l2_process_vlans(card);
1035
1036         netif_tx_disable(card->dev);
1037
1038         rc = qeth_init_qdio_queues(card);
1039         if (rc) {
1040                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1041                 rc = -ENODEV;
1042                 goto out_remove;
1043         }
1044         card->state = CARD_STATE_SOFTSETUP;
1045         if (card->lan_online)
1046                 netif_carrier_on(card->dev);
1047         else
1048                 netif_carrier_off(card->dev);
1049
1050         qeth_set_allowed_threads(card, 0xffffffff, 0);
1051         if (recover_flag == CARD_STATE_RECOVER) {
1052                 if (recovery_mode &&
1053                     card->info.type != QETH_CARD_TYPE_OSN) {
1054                         __qeth_l2_open(card->dev);
1055                 } else {
1056                         rtnl_lock();
1057                         dev_open(card->dev);
1058                         rtnl_unlock();
1059                 }
1060                 /* this also sets saved unicast addresses */
1061                 qeth_l2_set_multicast_list(card->dev);
1062         }
1063         /* let user_space know that device is online */
1064         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1065         mutex_unlock(&card->conf_mutex);
1066         mutex_unlock(&card->discipline_mutex);
1067         return 0;
1068
1069 out_remove:
1070         qeth_l2_stop_card(card, 0);
1071         ccw_device_set_offline(CARD_DDEV(card));
1072         ccw_device_set_offline(CARD_WDEV(card));
1073         ccw_device_set_offline(CARD_RDEV(card));
1074         if (recover_flag == CARD_STATE_RECOVER)
1075                 card->state = CARD_STATE_RECOVER;
1076         else
1077                 card->state = CARD_STATE_DOWN;
1078         mutex_unlock(&card->conf_mutex);
1079         mutex_unlock(&card->discipline_mutex);
1080         return rc;
1081 }
1082
1083 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1084 {
1085         return __qeth_l2_set_online(gdev, 0);
1086 }
1087
1088 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1089                                         int recovery_mode)
1090 {
1091         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1092         int rc = 0, rc2 = 0, rc3 = 0;
1093         enum qeth_card_states recover_flag;
1094
1095         mutex_lock(&card->discipline_mutex);
1096         mutex_lock(&card->conf_mutex);
1097         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1098         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1099
1100         if (card->dev && netif_carrier_ok(card->dev))
1101                 netif_carrier_off(card->dev);
1102         recover_flag = card->state;
1103         if ((!recovery_mode && card->info.hwtrap) || card->info.hwtrap == 2) {
1104                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1105                 card->info.hwtrap = 1;
1106         }
1107         qeth_l2_stop_card(card, recovery_mode);
1108         rc  = ccw_device_set_offline(CARD_DDEV(card));
1109         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1110         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1111         if (!rc)
1112                 rc = (rc2) ? rc2 : rc3;
1113         if (rc)
1114                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1115         if (recover_flag == CARD_STATE_UP)
1116                 card->state = CARD_STATE_RECOVER;
1117         /* let user_space know that device is offline */
1118         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1119         mutex_unlock(&card->conf_mutex);
1120         mutex_unlock(&card->discipline_mutex);
1121         return 0;
1122 }
1123
1124 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1125 {
1126         return __qeth_l2_set_offline(cgdev, 0);
1127 }
1128
1129 static int qeth_l2_recover(void *ptr)
1130 {
1131         struct qeth_card *card;
1132         int rc = 0;
1133
1134         card = (struct qeth_card *) ptr;
1135         QETH_CARD_TEXT(card, 2, "recover1");
1136         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1137                 return 0;
1138         QETH_CARD_TEXT(card, 2, "recover2");
1139         dev_warn(&card->gdev->dev,
1140                 "A recovery process has been started for the device\n");
1141         __qeth_l2_set_offline(card->gdev, 1);
1142         rc = __qeth_l2_set_online(card->gdev, 1);
1143         if (!rc)
1144                 dev_info(&card->gdev->dev,
1145                         "Device successfully recovered!\n");
1146         else {
1147                 if (rtnl_trylock()) {
1148                         dev_close(card->dev);
1149                         rtnl_unlock();
1150                         dev_warn(&card->gdev->dev, "The qeth device driver "
1151                                 "failed to recover an error on the device\n");
1152                 }
1153         }
1154         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1155         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1156         return 0;
1157 }
1158
1159 static int __init qeth_l2_init(void)
1160 {
1161         pr_info("register layer 2 discipline\n");
1162         return 0;
1163 }
1164
1165 static void __exit qeth_l2_exit(void)
1166 {
1167         pr_info("unregister layer 2 discipline\n");
1168 }
1169
1170 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1171 {
1172         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1173         qeth_set_allowed_threads(card, 0, 1);
1174         if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
1175                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1176         qeth_qdio_clear_card(card, 0);
1177         qeth_clear_qdio_buffers(card);
1178 }
1179
1180 static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev)
1181 {
1182         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1183
1184         if (card->dev)
1185                 netif_device_detach(card->dev);
1186         qeth_set_allowed_threads(card, 0, 1);
1187         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1188         if (gdev->state == CCWGROUP_OFFLINE)
1189                 return 0;
1190         if (card->state == CARD_STATE_UP) {
1191                 if (card->info.hwtrap)
1192                         qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1193                 __qeth_l2_set_offline(card->gdev, 1);
1194         } else
1195                 __qeth_l2_set_offline(card->gdev, 0);
1196         return 0;
1197 }
1198
1199 static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
1200 {
1201         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1202         int rc = 0;
1203
1204         if (gdev->state == CCWGROUP_OFFLINE)
1205                 goto out;
1206
1207         if (card->state == CARD_STATE_RECOVER) {
1208                 rc = __qeth_l2_set_online(card->gdev, 1);
1209                 if (rc) {
1210                         rtnl_lock();
1211                         dev_close(card->dev);
1212                         rtnl_unlock();
1213                 }
1214         } else
1215                 rc = __qeth_l2_set_online(card->gdev, 0);
1216 out:
1217         qeth_set_allowed_threads(card, 0xffffffff, 0);
1218         if (card->dev)
1219                 netif_device_attach(card->dev);
1220         if (rc)
1221                 dev_warn(&card->gdev->dev, "The qeth device driver "
1222                         "failed to recover an error on the device\n");
1223         return rc;
1224 }
1225
1226 struct qeth_discipline qeth_l2_discipline = {
1227         .start_poll = qeth_qdio_start_poll,
1228         .input_handler = (qdio_handler_t *) qeth_qdio_input_handler,
1229         .output_handler = (qdio_handler_t *) qeth_qdio_output_handler,
1230         .recover = qeth_l2_recover,
1231         .setup = qeth_l2_probe_device,
1232         .remove = qeth_l2_remove_device,
1233         .set_online = qeth_l2_set_online,
1234         .set_offline = qeth_l2_set_offline,
1235         .shutdown = qeth_l2_shutdown,
1236         .freeze = qeth_l2_pm_suspend,
1237         .thaw = qeth_l2_pm_resume,
1238         .restore = qeth_l2_pm_resume,
1239 };
1240 EXPORT_SYMBOL_GPL(qeth_l2_discipline);
1241
1242 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1243                            struct qeth_cmd_buffer *iob)
1244 {
1245         unsigned long flags;
1246         int rc = 0;
1247
1248         QETH_CARD_TEXT(card, 5, "osndctrd");
1249
1250         wait_event(card->wait_q,
1251                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1252         qeth_prepare_control_data(card, len, iob);
1253         QETH_CARD_TEXT(card, 6, "osnoirqp");
1254         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1255         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1256                               (addr_t) iob, 0, 0);
1257         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1258         if (rc) {
1259                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1260                            "ccw_device_start rc = %i\n", rc);
1261                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1262                 qeth_release_buffer(iob->channel, iob);
1263                 atomic_set(&card->write.irq_pending, 0);
1264                 wake_up(&card->wait_q);
1265         }
1266         return rc;
1267 }
1268
1269 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1270                         struct qeth_cmd_buffer *iob, int data_len)
1271 {
1272         u16 s1, s2;
1273
1274         QETH_CARD_TEXT(card, 4, "osndipa");
1275
1276         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1277         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1278         s2 = (u16)data_len;
1279         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1280         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1281         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1282         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1283         return qeth_osn_send_control_data(card, s1, iob);
1284 }
1285
1286 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1287 {
1288         struct qeth_cmd_buffer *iob;
1289         struct qeth_card *card;
1290         int rc;
1291
1292         if (!dev)
1293                 return -ENODEV;
1294         card = dev->ml_priv;
1295         if (!card)
1296                 return -ENODEV;
1297         QETH_CARD_TEXT(card, 2, "osnsdmc");
1298         if ((card->state != CARD_STATE_UP) &&
1299             (card->state != CARD_STATE_SOFTSETUP))
1300                 return -ENODEV;
1301         iob = qeth_wait_for_buffer(&card->write);
1302         memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1303         rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1304         return rc;
1305 }
1306 EXPORT_SYMBOL(qeth_osn_assist);
1307
1308 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1309                   int (*assist_cb)(struct net_device *, void *),
1310                   int (*data_cb)(struct sk_buff *))
1311 {
1312         struct qeth_card *card;
1313
1314         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1315         if (*dev == NULL)
1316                 return -ENODEV;
1317         card = (*dev)->ml_priv;
1318         if (!card)
1319                 return -ENODEV;
1320         QETH_CARD_TEXT(card, 2, "osnreg");
1321         if ((assist_cb == NULL) || (data_cb == NULL))
1322                 return -EINVAL;
1323         card->osn_info.assist_cb = assist_cb;
1324         card->osn_info.data_cb = data_cb;
1325         return 0;
1326 }
1327 EXPORT_SYMBOL(qeth_osn_register);
1328
1329 void qeth_osn_deregister(struct net_device *dev)
1330 {
1331         struct qeth_card *card;
1332
1333         if (!dev)
1334                 return;
1335         card = dev->ml_priv;
1336         if (!card)
1337                 return;
1338         QETH_CARD_TEXT(card, 2, "osndereg");
1339         card->osn_info.assist_cb = NULL;
1340         card->osn_info.data_cb = NULL;
1341         return;
1342 }
1343 EXPORT_SYMBOL(qeth_osn_deregister);
1344
1345 module_init(qeth_l2_init);
1346 module_exit(qeth_l2_exit);
1347 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1348 MODULE_DESCRIPTION("qeth layer 2 discipline");
1349 MODULE_LICENSE("GPL");