drivers/s390/net/qeth_l2_main.c

   1 /*
   2  *  drivers/s390/net/qeth_l2_main.c
   3  *
   4  *    Copyright IBM Corp. 2007, 2009
   5  *    Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
   6  *               Frank Pavlic <fpavlic@de.ibm.com>,
   7  *               Thomas Spatzier <tspat@de.ibm.com>,
   8  *               Frank Blaschka <frank.blaschka@de.ibm.com>
   9  */
  10
  11 #define KMSG_COMPONENT "qeth"
  12 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  13
  14 #include <linux/module.h>
  15 #include <linux/moduleparam.h>
  16 #include <linux/string.h>
  17 #include <linux/errno.h>
  18 #include <linux/kernel.h>
  19 #include <linux/slab.h>
  20 #include <linux/etherdevice.h>
  21 #include <linux/mii.h>
  22 #include <linux/ip.h>
  23 #include <linux/list.h>
  24
  25 #include "qeth_core.h"
  26
  27 static int qeth_l2_set_offline(struct ccwgroup_device *);
  28 static int qeth_l2_stop(struct net_device *);
  29 static int qeth_l2_send_delmac(struct qeth_card *, __u8 *);
  30 static int qeth_l2_send_setdelmac(struct qeth_card *, __u8 *,
  31                            enum qeth_ipa_cmds,
  32                            int (*reply_cb) (struct qeth_card *,
  33                                             struct qeth_reply*,
  34                                             unsigned long));
  35 static void qeth_l2_set_multicast_list(struct net_device *);
  36 static int qeth_l2_recover(void *);
  37
  38 static int qeth_l2_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
  39 {
  40         struct qeth_card *card = dev->ml_priv;
  41         struct mii_ioctl_data *mii_data;
  42         int rc = 0;
  43
  44         if (!card)
  45                 return -ENODEV;
  46
  47         if ((card->state != CARD_STATE_UP) &&
  48                 (card->state != CARD_STATE_SOFTSETUP))
  49                 return -ENODEV;
  50
  51         if (card->info.type == QETH_CARD_TYPE_OSN)
  52                 return -EPERM;
  53
  54         switch (cmd) {
  55         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
  56                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
  57                 break;
  58         case SIOC_QETH_GET_CARD_TYPE:
  59                 if ((card->info.type == QETH_CARD_TYPE_OSD ||
  60                      card->info.type == QETH_CARD_TYPE_OSM ||
  61                      card->info.type == QETH_CARD_TYPE_OSX) &&
  62                     !card->info.guestlan)
  63                         return 1;
  64                 return 0;
  65                 break;
  66         case SIOCGMIIPHY:
  67                 mii_data = if_mii(rq);
  68                 mii_data->phy_id = 0;
  69                 break;
  70         case SIOCGMIIREG:
  71                 mii_data = if_mii(rq);
  72                 if (mii_data->phy_id != 0)
  73                         rc = -EINVAL;
  74                 else
  75                         mii_data->val_out = qeth_mdio_read(dev,
  76                                 mii_data->phy_id, mii_data->reg_num);
  77                 break;
  78         default:
  79                 rc = -EOPNOTSUPP;
  80         }
  81         if (rc)
  82                 QETH_CARD_TEXT_(card, 2, "ioce%d", rc);
  83         return rc;
  84 }
  85
  86 static int qeth_l2_verify_dev(struct net_device *dev)
  87 {
  88         struct qeth_card *card;
  89         unsigned long flags;
  90         int rc = 0;
  91
  92         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
  93         list_for_each_entry(card, &qeth_core_card_list.list, list) {
  94                 if (card->dev == dev) {
  95                         rc = QETH_REAL_CARD;
  96                         break;
  97                 }
  98         }
  99         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
 100
 101         return rc;
 102 }
 103
 104 static struct net_device *qeth_l2_netdev_by_devno(unsigned char *read_dev_no)
 105 {
 106         struct qeth_card *card;
 107         struct net_device *ndev;
 108         __u16 temp_dev_no;
 109         unsigned long flags;
 110         struct ccw_dev_id read_devid;
 111
 112         ndev = NULL;
 113         memcpy(&temp_dev_no, read_dev_no, 2);
 114         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
 115         list_for_each_entry(card, &qeth_core_card_list.list, list) {
 116                 ccw_device_get_id(CARD_RDEV(card), &read_devid);
 117                 if (read_devid.devno == temp_dev_no) {
 118                         ndev = card->dev;
 119                         break;
 120                 }
 121         }
 122         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
 123         return ndev;
 124 }
 125
 126 static int qeth_l2_send_setgroupmac_cb(struct qeth_card *card,
 127                                 struct qeth_reply *reply,
 128                                 unsigned long data)
 129 {
 130         struct qeth_ipa_cmd *cmd;
 131         __u8 *mac;
 132
 133         QETH_CARD_TEXT(card, 2, "L2Sgmacb");
 134         cmd = (struct qeth_ipa_cmd *) data;
 135         mac = &cmd->data.setdelmac.mac[0];
 136         /* MAC already registered, needed in couple/uncouple case */
 137         if (cmd->hdr.return_code ==  IPA_RC_L2_DUP_MAC) {
 138                 QETH_DBF_MESSAGE(2, "Group MAC %pM already existing on %s \n",
 139                           mac, QETH_CARD_IFNAME(card));
 140                 cmd->hdr.return_code = 0;
 141         }
 142         if (cmd->hdr.return_code)
 143                 QETH_DBF_MESSAGE(2, "Could not set group MAC %pM on %s: %x\n",
 144                           mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 145         return 0;
 146 }
 147
 148 static int qeth_l2_send_setgroupmac(struct qeth_card *card, __u8 *mac)
 149 {
 150         QETH_CARD_TEXT(card, 2, "L2Sgmac");
 151         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETGMAC,
 152                                           qeth_l2_send_setgroupmac_cb);
 153 }
 154
 155 static int qeth_l2_send_delgroupmac_cb(struct qeth_card *card,
 156                                 struct qeth_reply *reply,
 157                                 unsigned long data)
 158 {
 159         struct qeth_ipa_cmd *cmd;
 160         __u8 *mac;
 161
 162         QETH_CARD_TEXT(card, 2, "L2Dgmacb");
 163         cmd = (struct qeth_ipa_cmd *) data;
 164         mac = &cmd->data.setdelmac.mac[0];
 165         if (cmd->hdr.return_code)
 166                 QETH_DBF_MESSAGE(2, "Could not delete group MAC %pM on %s: %x\n",
 167                           mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 168         return 0;
 169 }
 170
 171 static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac)
 172 {
 173         QETH_CARD_TEXT(card, 2, "L2Dgmac");
 174         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELGMAC,
 175                                           qeth_l2_send_delgroupmac_cb);
 176 }
 177
 178 static void qeth_l2_add_mc(struct qeth_card *card, __u8 *mac, int vmac)
 179 {
 180         struct qeth_mc_mac *mc;
 181         int rc;
 182
 183         mc = kmalloc(sizeof(struct qeth_mc_mac), GFP_ATOMIC);
 184
 185         if (!mc)
 186                 return;
 187
 188         memcpy(mc->mc_addr, mac, OSA_ADDR_LEN);
 189         mc->mc_addrlen = OSA_ADDR_LEN;
 190         mc->is_vmac = vmac;
 191
 192         if (vmac) {
 193                 rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
 194                                         NULL);
 195         } else {
 196                 rc = qeth_l2_send_setgroupmac(card, mac);
 197         }
 198
 199         if (!rc)
 200                 list_add_tail(&mc->list, &card->mc_list);
 201         else
 202                 kfree(mc);
 203 }
 204
 205 static void qeth_l2_del_all_mc(struct qeth_card *card, int del)
 206 {
 207         struct qeth_mc_mac *mc, *tmp;
 208
 209         spin_lock_bh(&card->mclock);
 210         list_for_each_entry_safe(mc, tmp, &card->mc_list, list) {
 211                 if (del) {
 212                         if (mc->is_vmac)
 213                                 qeth_l2_send_setdelmac(card, mc->mc_addr,
 214                                         IPA_CMD_DELVMAC, NULL);
 215                         else
 216                                 qeth_l2_send_delgroupmac(card, mc->mc_addr);
 217                 }
 218                 list_del(&mc->list);
 219                 kfree(mc);
 220         }
 221         spin_unlock_bh(&card->mclock);
 222 }
 223
 224 static inline int qeth_l2_get_cast_type(struct qeth_card *card,
 225                         struct sk_buff *skb)
 226 {
 227         if (card->info.type == QETH_CARD_TYPE_OSN)
 228                 return RTN_UNSPEC;
 229         if (is_broadcast_ether_addr(skb->data))
 230                 return RTN_BROADCAST;
 231         if (is_multicast_ether_addr(skb->data))
 232                 return RTN_MULTICAST;
 233         return RTN_UNSPEC;
 234 }
 235
 236 static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
 237                         struct sk_buff *skb, int ipv, int cast_type)
 238 {
 239         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
 240
 241         memset(hdr, 0, sizeof(struct qeth_hdr));
 242         hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
 243
 244         /* set byte byte 3 to casting flags */
 245         if (cast_type == RTN_MULTICAST)
 246                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 247         else if (cast_type == RTN_BROADCAST)
 248                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 249         else
 250                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 251
 252         hdr->hdr.l2.pkt_length = skb->len-QETH_HEADER_SIZE;
 253         /* VSWITCH relies on the VLAN
 254          * information to be present in
 255          * the QDIO header */
 256         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
 257                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
 258                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
 259         }
 260 }
 261
 262 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
 263                         struct qeth_reply *reply, unsigned long data)
 264 {
 265         struct qeth_ipa_cmd *cmd;
 266
 267         QETH_CARD_TEXT(card, 2, "L2sdvcb");
 268         cmd = (struct qeth_ipa_cmd *) data;
 269         if (cmd->hdr.return_code) {
 270                 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x. "
 271                           "Continuing\n", cmd->data.setdelvlan.vlan_id,
 272                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 273                 QETH_CARD_TEXT_(card, 2, "L2VL%4x", cmd->hdr.command);
 274                 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code);
 275         }
 276         return 0;
 277 }
 278
 279 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
 280                                 enum qeth_ipa_cmds ipacmd)
 281 {
 282         struct qeth_ipa_cmd *cmd;
 283         struct qeth_cmd_buffer *iob;
 284
 285         QETH_CARD_TEXT_(card, 4, "L2sdv%x", ipacmd);
 286         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 287         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 288         cmd->data.setdelvlan.vlan_id = i;
 289         return qeth_send_ipa_cmd(card, iob,
 290                                  qeth_l2_send_setdelvlan_cb, NULL);
 291 }
 292
 293 static void qeth_l2_process_vlans(struct qeth_card *card)
 294 {
 295         struct qeth_vlan_vid *id;
 296         QETH_CARD_TEXT(card, 3, "L2prcvln");
 297         spin_lock_bh(&card->vlanlock);
 298         list_for_each_entry(id, &card->vid_list, list) {
 299                 qeth_l2_send_setdelvlan(card, id->vid, IPA_CMD_SETVLAN);
 300         }
 301         spin_unlock_bh(&card->vlanlock);
 302 }
 303
 304 static void qeth_l2_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
 305 {
 306         struct qeth_card *card = dev->ml_priv;
 307         struct qeth_vlan_vid *id;
 308
 309         QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
 310         if (!vid)
 311                 return;
 312         if (card->info.type == QETH_CARD_TYPE_OSM) {
 313                 QETH_CARD_TEXT(card, 3, "aidOSM");
 314                 return;
 315         }
 316         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 317                 QETH_CARD_TEXT(card, 3, "aidREC");
 318                 return;
 319         }
 320         id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
 321         if (id) {
 322                 id->vid = vid;
 323                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
 324                 spin_lock_bh(&card->vlanlock);
 325                 list_add_tail(&id->list, &card->vid_list);
 326                 spin_unlock_bh(&card->vlanlock);
 327         }
 328 }
 329
 330 static void qeth_l2_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
 331 {
 332         struct qeth_vlan_vid *id, *tmpid = NULL;
 333         struct qeth_card *card = dev->ml_priv;
 334
 335         QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
 336         if (card->info.type == QETH_CARD_TYPE_OSM) {
 337                 QETH_CARD_TEXT(card, 3, "kidOSM");
 338                 return;
 339         }
 340         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 341                 QETH_CARD_TEXT(card, 3, "kidREC");
 342                 return;
 343         }
 344         spin_lock_bh(&card->vlanlock);
 345         list_for_each_entry(id, &card->vid_list, list) {
 346                 if (id->vid == vid) {
 347                         list_del(&id->list);
 348                         tmpid = id;
 349                         break;
 350                 }
 351         }
 352         spin_unlock_bh(&card->vlanlock);
 353         if (tmpid) {
 354                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 355                 kfree(tmpid);
 356         }
 357         qeth_l2_set_multicast_list(card->dev);
 358 }
 359
 360 static int qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
 361 {
 362         int rc = 0;
 363
 364         QETH_DBF_TEXT(SETUP , 2, "stopcard");
 365         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 366
 367         qeth_set_allowed_threads(card, 0, 1);
 368         if (card->read.state == CH_STATE_UP &&
 369             card->write.state == CH_STATE_UP &&
 370             (card->state == CARD_STATE_UP)) {
 371                 if (recovery_mode &&
 372                     card->info.type != QETH_CARD_TYPE_OSN) {
 373                         qeth_l2_stop(card->dev);
 374                 } else {
 375                         rtnl_lock();
 376                         dev_close(card->dev);
 377                         rtnl_unlock();
 378                 }
 379                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 380                 card->state = CARD_STATE_SOFTSETUP;
 381         }
 382         if (card->state == CARD_STATE_SOFTSETUP) {
 383                 qeth_l2_del_all_mc(card, 0);
 384                 qeth_clear_ipacmd_list(card);
 385                 card->state = CARD_STATE_HARDSETUP;
 386         }
 387         if (card->state == CARD_STATE_HARDSETUP) {
 388                 qeth_qdio_clear_card(card, 0);
 389                 qeth_clear_qdio_buffers(card);
 390                 qeth_clear_working_pool_list(card);
 391                 card->state = CARD_STATE_DOWN;
 392         }
 393         if (card->state == CARD_STATE_DOWN) {
 394                 qeth_clear_cmd_buffers(&card->read);
 395                 qeth_clear_cmd_buffers(&card->write);
 396         }
 397         return rc;
 398 }
 399
 400 static int qeth_l2_process_inbound_buffer(struct qeth_card *card,
 401                                 int budget, int *done)
 402 {
 403         int work_done = 0;
 404         struct sk_buff *skb;
 405         struct qeth_hdr *hdr;
 406         unsigned int len;
 407
 408         *done = 0;
 409         BUG_ON(!budget);
 410         while (budget) {
 411                 skb = qeth_core_get_next_skb(card,
 412                         &card->qdio.in_q->bufs[card->rx.b_index],
 413                         &card->rx.b_element, &card->rx.e_offset, &hdr);
 414                 if (!skb) {
 415                         *done = 1;
 416                         break;
 417                 }
 418                 skb->dev = card->dev;
 419                 switch (hdr->hdr.l2.id) {
 420                 case QETH_HEADER_TYPE_LAYER2:
 421                         skb->pkt_type = PACKET_HOST;
 422                         skb->protocol = eth_type_trans(skb, skb->dev);
 423                         skb->ip_summed = CHECKSUM_NONE;
 424                         if (skb->protocol == htons(ETH_P_802_2))
 425                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
 426                         len = skb->len;
 427                         netif_receive_skb(skb);
 428                         break;
 429                 case QETH_HEADER_TYPE_OSN:
 430                         if (card->info.type == QETH_CARD_TYPE_OSN) {
 431                                 skb_push(skb, sizeof(struct qeth_hdr));
 432                                 skb_copy_to_linear_data(skb, hdr,
 433                                                 sizeof(struct qeth_hdr));
 434                                 len = skb->len;
 435                                 card->osn_info.data_cb(skb);
 436                                 break;
 437                         }
 438                         /* else unknown */
 439                 default:
 440                         dev_kfree_skb_any(skb);
 441                         QETH_CARD_TEXT(card, 3, "inbunkno");
 442                         QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
 443                         continue;
 444                 }
 445                 work_done++;
 446                 budget--;
 447                 card->stats.rx_packets++;
 448                 card->stats.rx_bytes += len;
 449         }
 450         return work_done;
 451 }
 452
 453 static int qeth_l2_poll(struct napi_struct *napi, int budget)
 454 {
 455         struct qeth_card *card = container_of(napi, struct qeth_card, napi);
 456         int work_done = 0;
 457         struct qeth_qdio_buffer *buffer;
 458         int done;
 459         int new_budget = budget;
 460
 461         if (card->options.performance_stats) {
 462                 card->perf_stats.inbound_cnt++;
 463                 card->perf_stats.inbound_start_time = qeth_get_micros();
 464         }
 465
 466         while (1) {
 467                 if (!card->rx.b_count) {
 468                         card->rx.qdio_err = 0;
 469                         card->rx.b_count = qdio_get_next_buffers(
 470                                 card->data.ccwdev, 0, &card->rx.b_index,
 471                                 &card->rx.qdio_err);
 472                         if (card->rx.b_count <= 0) {
 473                                 card->rx.b_count = 0;
 474                                 break;
 475                         }
 476                         card->rx.b_element =
 477                                 &card->qdio.in_q->bufs[card->rx.b_index]
 478                                 .buffer->element[0];
 479                         card->rx.e_offset = 0;
 480                 }
 481
 482                 while (card->rx.b_count) {
 483                         buffer = &card->qdio.in_q->bufs[card->rx.b_index];
 484                         if (!(card->rx.qdio_err &&
 485                             qeth_check_qdio_errors(card, buffer->buffer,
 486                             card->rx.qdio_err, "qinerr")))
 487                                 work_done += qeth_l2_process_inbound_buffer(
 488                                         card, new_budget, &done);
 489                         else
 490                                 done = 1;
 491
 492                         if (done) {
 493                                 if (card->options.performance_stats)
 494                                         card->perf_stats.bufs_rec++;
 495                                 qeth_put_buffer_pool_entry(card,
 496                                         buffer->pool_entry);
 497                                 qeth_queue_input_buffer(card, card->rx.b_index);
 498                                 card->rx.b_count--;
 499                                 if (card->rx.b_count) {
 500                                         card->rx.b_index =
 501                                                 (card->rx.b_index + 1) %
 502                                                 QDIO_MAX_BUFFERS_PER_Q;
 503                                         card->rx.b_element =
 504                                                 &card->qdio.in_q
 505                                                 ->bufs[card->rx.b_index]
 506                                                 .buffer->element[0];
 507                                         card->rx.e_offset = 0;
 508                                 }
 509                         }
 510
 511                         if (work_done >= budget)
 512                                 goto out;
 513                         else
 514                                 new_budget = budget - work_done;
 515                 }
 516         }
 517
 518         napi_complete(napi);
 519         if (qdio_start_irq(card->data.ccwdev, 0))
 520                 napi_schedule(&card->napi);
 521 out:
 522         if (card->options.performance_stats)
 523                 card->perf_stats.inbound_time += qeth_get_micros() -
 524                         card->perf_stats.inbound_start_time;
 525         return work_done;
 526 }
 527
 528 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
 529                            enum qeth_ipa_cmds ipacmd,
 530                            int (*reply_cb) (struct qeth_card *,
 531                                             struct qeth_reply*,
 532                                             unsigned long))
 533 {
 534         struct qeth_ipa_cmd *cmd;
 535         struct qeth_cmd_buffer *iob;
 536
 537         QETH_CARD_TEXT(card, 2, "L2sdmac");
 538         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 539         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 540         cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
 541         memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
 542         return qeth_send_ipa_cmd(card, iob, reply_cb, NULL);
 543 }
 544
 545 static int qeth_l2_send_setmac_cb(struct qeth_card *card,
 546                            struct qeth_reply *reply,
 547                            unsigned long data)
 548 {
 549         struct qeth_ipa_cmd *cmd;
 550
 551         QETH_CARD_TEXT(card, 2, "L2Smaccb");
 552         cmd = (struct qeth_ipa_cmd *) data;
 553         if (cmd->hdr.return_code) {
 554                 QETH_CARD_TEXT_(card, 2, "L2er%x", cmd->hdr.return_code);
 555                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 556                 switch (cmd->hdr.return_code) {
 557                 case IPA_RC_L2_DUP_MAC:
 558                 case IPA_RC_L2_DUP_LAYER3_MAC:
 559                         dev_warn(&card->gdev->dev,
 560                                 "MAC address %pM already exists\n",
 561                                 cmd->data.setdelmac.mac);
 562                         break;
 563                 case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
 564                 case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
 565                         dev_warn(&card->gdev->dev,
 566                                 "MAC address %pM is not authorized\n",
 567                                 cmd->data.setdelmac.mac);
 568                         break;
 569                 default:
 570                         break;
 571                 }
 572                 cmd->hdr.return_code = -EIO;
 573         } else {
 574                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 575                 memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
 576                        OSA_ADDR_LEN);
 577                 dev_info(&card->gdev->dev,
 578                         "MAC address %pM successfully registered on device %s\n",
 579                         card->dev->dev_addr, card->dev->name);
 580         }
 581         return 0;
 582 }
 583
 584 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
 585 {
 586         QETH_CARD_TEXT(card, 2, "L2Setmac");
 587         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
 588                                           qeth_l2_send_setmac_cb);
 589 }
 590
 591 static int qeth_l2_send_delmac_cb(struct qeth_card *card,
 592                            struct qeth_reply *reply,
 593                            unsigned long data)
 594 {
 595         struct qeth_ipa_cmd *cmd;
 596
 597         QETH_CARD_TEXT(card, 2, "L2Dmaccb");
 598         cmd = (struct qeth_ipa_cmd *) data;
 599         if (cmd->hdr.return_code) {
 600                 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code);
 601                 cmd->hdr.return_code = -EIO;
 602                 return 0;
 603         }
 604         card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 605
 606         return 0;
 607 }
 608
 609 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
 610 {
 611         QETH_CARD_TEXT(card, 2, "L2Delmac");
 612         if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
 613                 return 0;
 614         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
 615                                           qeth_l2_send_delmac_cb);
 616 }
 617
 618 static int qeth_l2_request_initial_mac(struct qeth_card *card)
 619 {
 620         int rc = 0;
 621         char vendor_pre[] = {0x02, 0x00, 0x00};
 622
 623         QETH_DBF_TEXT(SETUP, 2, "doL2init");
 624         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
 625
 626         rc = qeth_query_setadapterparms(card);
 627         if (rc) {
 628                 QETH_DBF_MESSAGE(2, "could not query adapter parameters on "
 629                         "device %s: x%x\n", CARD_BUS_ID(card), rc);
 630         }
 631
 632         if (card->info.type == QETH_CARD_TYPE_IQD ||
 633             card->info.type == QETH_CARD_TYPE_OSM ||
 634             card->info.type == QETH_CARD_TYPE_OSX ||
 635             card->info.guestlan) {
 636                 rc = qeth_setadpparms_change_macaddr(card);
 637                 if (rc) {
 638                         QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
 639                                 "device %s: x%x\n", CARD_BUS_ID(card), rc);
 640                         QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 641                         return rc;
 642                 }
 643                 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN);
 644         } else {
 645                 random_ether_addr(card->dev->dev_addr);
 646                 memcpy(card->dev->dev_addr, vendor_pre, 3);
 647         }
 648         return 0;
 649 }
 650
 651 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 652 {
 653         struct sockaddr *addr = p;
 654         struct qeth_card *card = dev->ml_priv;
 655         int rc = 0;
 656
 657         QETH_CARD_TEXT(card, 3, "setmac");
 658
 659         if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
 660                 QETH_CARD_TEXT(card, 3, "setmcINV");
 661                 return -EOPNOTSUPP;
 662         }
 663
 664         if (card->info.type == QETH_CARD_TYPE_OSN ||
 665             card->info.type == QETH_CARD_TYPE_OSM ||
 666             card->info.type == QETH_CARD_TYPE_OSX) {
 667                 QETH_CARD_TEXT(card, 3, "setmcTYP");
 668                 return -EOPNOTSUPP;
 669         }
 670         QETH_CARD_HEX(card, 3, addr->sa_data, OSA_ADDR_LEN);
 671         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 672                 QETH_CARD_TEXT(card, 3, "setmcREC");
 673                 return -ERESTARTSYS;
 674         }
 675         rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
 676         if (!rc)
 677                 rc = qeth_l2_send_setmac(card, addr->sa_data);
 678         return rc;
 679 }
 680
 681 static void qeth_l2_set_multicast_list(struct net_device *dev)
 682 {
 683         struct qeth_card *card = dev->ml_priv;
 684         struct netdev_hw_addr *ha;
 685
 686         if (card->info.type == QETH_CARD_TYPE_OSN)
 687                 return ;
 688
 689         QETH_CARD_TEXT(card, 3, "setmulti");
 690         if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
 691             (card->state != CARD_STATE_UP))
 692                 return;
 693         qeth_l2_del_all_mc(card, 1);
 694         spin_lock_bh(&card->mclock);
 695         netdev_for_each_mc_addr(ha, dev)
 696                 qeth_l2_add_mc(card, ha->addr, 0);
 697
 698         netdev_for_each_uc_addr(ha, dev)
 699                 qeth_l2_add_mc(card, ha->addr, 1);
 700
 701         spin_unlock_bh(&card->mclock);
 702         if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
 703                 return;
 704         qeth_setadp_promisc_mode(card);
 705 }
 706
 707 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 708 {
 709         int rc;
 710         struct qeth_hdr *hdr = NULL;
 711         int elements = 0;
 712         struct qeth_card *card = dev->ml_priv;
 713         struct sk_buff *new_skb = skb;
 714         int ipv = qeth_get_ip_version(skb);
 715         int cast_type = qeth_l2_get_cast_type(card, skb);
 716         struct qeth_qdio_out_q *queue = card->qdio.out_qs
 717                 [qeth_get_priority_queue(card, skb, ipv, cast_type)];
 718         int tx_bytes = skb->len;
 719         int data_offset = -1;
 720         int elements_needed = 0;
 721         int hd_len = 0;
 722
 723         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
 724                 card->stats.tx_carrier_errors++;
 725                 goto tx_drop;
 726         }
 727
 728         if ((card->info.type == QETH_CARD_TYPE_OSN) &&
 729             (skb->protocol == htons(ETH_P_IPV6)))
 730                 goto tx_drop;
 731
 732         if (card->options.performance_stats) {
 733                 card->perf_stats.outbound_cnt++;
 734                 card->perf_stats.outbound_start_time = qeth_get_micros();
 735         }
 736         netif_stop_queue(dev);
 737
 738         if (card->info.type == QETH_CARD_TYPE_OSN)
 739                 hdr = (struct qeth_hdr *)skb->data;
 740         else {
 741                 if (card->info.type == QETH_CARD_TYPE_IQD) {
 742                         new_skb = skb;
 743                         data_offset = ETH_HLEN;
 744                         hd_len = ETH_HLEN;
 745                         hdr = kmem_cache_alloc(qeth_core_header_cache,
 746                                                 GFP_ATOMIC);
 747                         if (!hdr)
 748                                 goto tx_drop;
 749                         elements_needed++;
 750                         skb_reset_mac_header(new_skb);
 751                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 752                         hdr->hdr.l2.pkt_length = new_skb->len;
 753                         memcpy(((char *)hdr) + sizeof(struct qeth_hdr),
 754                                 skb_mac_header(new_skb), ETH_HLEN);
 755                 } else {
 756                         /* create a clone with writeable headroom */
 757                         new_skb = skb_realloc_headroom(skb,
 758                                                 sizeof(struct qeth_hdr));
 759                         if (!new_skb)
 760                                 goto tx_drop;
 761                         hdr = (struct qeth_hdr *)skb_push(new_skb,
 762                                                 sizeof(struct qeth_hdr));
 763                         skb_set_mac_header(new_skb, sizeof(struct qeth_hdr));
 764                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 765                 }
 766         }
 767
 768         elements = qeth_get_elements_no(card, (void *)hdr, new_skb,
 769                                                 elements_needed);
 770         if (!elements) {
 771                 if (data_offset >= 0)
 772                         kmem_cache_free(qeth_core_header_cache, hdr);
 773                 goto tx_drop;
 774         }
 775
 776         if (card->info.type != QETH_CARD_TYPE_IQD) {
 777                 if (qeth_hdr_chk_and_bounce(new_skb,
 778                     sizeof(struct qeth_hdr_layer2)))
 779                         goto tx_drop;
 780                 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
 781                                          elements);
 782         } else
 783                 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
 784                                         elements, data_offset, hd_len);
 785         if (!rc) {
 786                 card->stats.tx_packets++;
 787                 card->stats.tx_bytes += tx_bytes;
 788                 if (new_skb != skb)
 789                         dev_kfree_skb_any(skb);
 790                 rc = NETDEV_TX_OK;
 791         } else {
 792                 if (data_offset >= 0)
 793                         kmem_cache_free(qeth_core_header_cache, hdr);
 794
 795                 if (rc == -EBUSY) {
 796                         if (new_skb != skb)
 797                                 dev_kfree_skb_any(new_skb);
 798                         return NETDEV_TX_BUSY;
 799                 } else
 800                         goto tx_drop;
 801         }
 802
 803         netif_wake_queue(dev);
 804         if (card->options.performance_stats)
 805                 card->perf_stats.outbound_time += qeth_get_micros() -
 806                         card->perf_stats.outbound_start_time;
 807         return rc;
 808
 809 tx_drop:
 810         card->stats.tx_dropped++;
 811         card->stats.tx_errors++;
 812         if ((new_skb != skb) && new_skb)
 813                 dev_kfree_skb_any(new_skb);
 814         dev_kfree_skb_any(skb);
 815         netif_wake_queue(dev);
 816         return NETDEV_TX_OK;
 817 }
 818
 819 static int __qeth_l2_open(struct net_device *dev)
 820 {
 821         struct qeth_card *card = dev->ml_priv;
 822         int rc = 0;
 823
 824         QETH_CARD_TEXT(card, 4, "qethopen");
 825         if (card->state == CARD_STATE_UP)
 826                 return rc;
 827         if (card->state != CARD_STATE_SOFTSETUP)
 828                 return -ENODEV;
 829
 830         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
 831              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
 832                 QETH_CARD_TEXT(card, 4, "nomacadr");
 833                 return -EPERM;
 834         }
 835         card->data.state = CH_STATE_UP;
 836         card->state = CARD_STATE_UP;
 837         netif_start_queue(dev);
 838
 839         if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) {
 840                 napi_enable(&card->napi);
 841                 napi_schedule(&card->napi);
 842         } else
 843                 rc = -EIO;
 844         return rc;
 845 }
 846
 847 static int qeth_l2_open(struct net_device *dev)
 848 {
 849         struct qeth_card *card = dev->ml_priv;
 850
 851         QETH_CARD_TEXT(card, 5, "qethope_");
 852         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 853                 QETH_CARD_TEXT(card, 3, "openREC");
 854                 return -ERESTARTSYS;
 855         }
 856         return __qeth_l2_open(dev);
 857 }
 858
 859 static int qeth_l2_stop(struct net_device *dev)
 860 {
 861         struct qeth_card *card = dev->ml_priv;
 862
 863         QETH_CARD_TEXT(card, 4, "qethstop");
 864         netif_tx_disable(dev);
 865         if (card->state == CARD_STATE_UP) {
 866                 card->state = CARD_STATE_SOFTSETUP;
 867                 napi_disable(&card->napi);
 868         }
 869         return 0;
 870 }
 871
 872 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 873 {
 874         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 875
 876         INIT_LIST_HEAD(&card->vid_list);
 877         INIT_LIST_HEAD(&card->mc_list);
 878         card->options.layer2 = 1;
 879         card->info.hwtrap = 0;
 880         card->discipline.start_poll = qeth_qdio_start_poll;
 881         card->discipline.input_handler = (qdio_handler_t *)
 882                 qeth_qdio_input_handler;
 883         card->discipline.output_handler = (qdio_handler_t *)
 884                 qeth_qdio_output_handler;
 885         card->discipline.recover = qeth_l2_recover;
 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                 rtnl_lock();
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         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1154         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1155         return 0;
1156 }
1157
1158 static int __init qeth_l2_init(void)
1159 {
1160         pr_info("register layer 2 discipline\n");
1161         return 0;
1162 }
1163
1164 static void __exit qeth_l2_exit(void)
1165 {
1166         pr_info("unregister layer 2 discipline\n");
1167 }
1168
1169 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1170 {
1171         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1172         if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
1173                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1174         qeth_qdio_clear_card(card, 0);
1175         qeth_clear_qdio_buffers(card);
1176 }
1177
1178 static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev)
1179 {
1180         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1181
1182         if (card->dev)
1183                 netif_device_detach(card->dev);
1184         qeth_set_allowed_threads(card, 0, 1);
1185         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1186         if (gdev->state == CCWGROUP_OFFLINE)
1187                 return 0;
1188         if (card->state == CARD_STATE_UP) {
1189                 if (card->info.hwtrap)
1190                         qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1191                 __qeth_l2_set_offline(card->gdev, 1);
1192         } else
1193                 __qeth_l2_set_offline(card->gdev, 0);
1194         return 0;
1195 }
1196
1197 static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
1198 {
1199         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1200         int rc = 0;
1201
1202         if (gdev->state == CCWGROUP_OFFLINE)
1203                 goto out;
1204
1205         if (card->state == CARD_STATE_RECOVER) {
1206                 rc = __qeth_l2_set_online(card->gdev, 1);
1207                 if (rc) {
1208                         rtnl_lock();
1209                         dev_close(card->dev);
1210                         rtnl_unlock();
1211                 }
1212         } else
1213                 rc = __qeth_l2_set_online(card->gdev, 0);
1214 out:
1215         qeth_set_allowed_threads(card, 0xffffffff, 0);
1216         if (card->dev)
1217                 netif_device_attach(card->dev);
1218         if (rc)
1219                 dev_warn(&card->gdev->dev, "The qeth device driver "
1220                         "failed to recover an error on the device\n");
1221         return rc;
1222 }
1223
1224 struct ccwgroup_driver qeth_l2_ccwgroup_driver = {
1225         .probe = qeth_l2_probe_device,
1226         .remove = qeth_l2_remove_device,
1227         .set_online = qeth_l2_set_online,
1228         .set_offline = qeth_l2_set_offline,
1229         .shutdown = qeth_l2_shutdown,
1230         .freeze = qeth_l2_pm_suspend,
1231         .thaw = qeth_l2_pm_resume,
1232         .restore = qeth_l2_pm_resume,
1233 };
1234 EXPORT_SYMBOL_GPL(qeth_l2_ccwgroup_driver);
1235
1236 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1237                            struct qeth_cmd_buffer *iob)
1238 {
1239         unsigned long flags;
1240         int rc = 0;
1241
1242         QETH_CARD_TEXT(card, 5, "osndctrd");
1243
1244         wait_event(card->wait_q,
1245                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1246         qeth_prepare_control_data(card, len, iob);
1247         QETH_CARD_TEXT(card, 6, "osnoirqp");
1248         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1249         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1250                               (addr_t) iob, 0, 0);
1251         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1252         if (rc) {
1253                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1254                            "ccw_device_start rc = %i\n", rc);
1255                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1256                 qeth_release_buffer(iob->channel, iob);
1257                 atomic_set(&card->write.irq_pending, 0);
1258                 wake_up(&card->wait_q);
1259         }
1260         return rc;
1261 }
1262
1263 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1264                         struct qeth_cmd_buffer *iob, int data_len)
1265 {
1266         u16 s1, s2;
1267
1268         QETH_CARD_TEXT(card, 4, "osndipa");
1269
1270         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1271         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1272         s2 = (u16)data_len;
1273         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1274         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1275         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1276         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1277         return qeth_osn_send_control_data(card, s1, iob);
1278 }
1279
1280 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1281 {
1282         struct qeth_cmd_buffer *iob;
1283         struct qeth_card *card;
1284         int rc;
1285
1286         if (!dev)
1287                 return -ENODEV;
1288         card = dev->ml_priv;
1289         if (!card)
1290                 return -ENODEV;
1291         QETH_CARD_TEXT(card, 2, "osnsdmc");
1292         if ((card->state != CARD_STATE_UP) &&
1293             (card->state != CARD_STATE_SOFTSETUP))
1294                 return -ENODEV;
1295         iob = qeth_wait_for_buffer(&card->write);
1296         memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1297         rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1298         return rc;
1299 }
1300 EXPORT_SYMBOL(qeth_osn_assist);
1301
1302 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1303                   int (*assist_cb)(struct net_device *, void *),
1304                   int (*data_cb)(struct sk_buff *))
1305 {
1306         struct qeth_card *card;
1307
1308         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1309         if (*dev == NULL)
1310                 return -ENODEV;
1311         card = (*dev)->ml_priv;
1312         if (!card)
1313                 return -ENODEV;
1314         QETH_CARD_TEXT(card, 2, "osnreg");
1315         if ((assist_cb == NULL) || (data_cb == NULL))
1316                 return -EINVAL;
1317         card->osn_info.assist_cb = assist_cb;
1318         card->osn_info.data_cb = data_cb;
1319         return 0;
1320 }
1321 EXPORT_SYMBOL(qeth_osn_register);
1322
1323 void qeth_osn_deregister(struct net_device *dev)
1324 {
1325         struct qeth_card *card;
1326
1327         if (!dev)
1328                 return;
1329         card = dev->ml_priv;
1330         if (!card)
1331                 return;
1332         QETH_CARD_TEXT(card, 2, "osndereg");
1333         card->osn_info.assist_cb = NULL;
1334         card->osn_info.data_cb = NULL;
1335         return;
1336 }
1337 EXPORT_SYMBOL(qeth_osn_deregister);
1338
1339 module_init(qeth_l2_init);
1340 module_exit(qeth_l2_exit);
1341 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1342 MODULE_DESCRIPTION("qeth layer 2 discipline");
1343 MODULE_LICENSE("GPL");