drivers/s390/net/qeth_l2_main.c

   1 /*
   2  *  drivers/s390/net/qeth_l2_main.c
   3  *
   4  *    Copyright IBM Corp. 2007
   5  *    Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
   6  *               Frank Pavlic <fpavlic@de.ibm.com>,
   7  *               Thomas Spatzier <tspat@de.ibm.com>,
   8  *               Frank Blaschka <frank.blaschka@de.ibm.com>
   9  */
  10
  11 #define KMSG_COMPONENT "qeth"
  12 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  13
  14 #include <linux/module.h>
  15 #include <linux/moduleparam.h>
  16 #include <linux/string.h>
  17 #include <linux/errno.h>
  18 #include <linux/kernel.h>
  19 #include <linux/etherdevice.h>
  20 #include <linux/mii.h>
  21 #include <linux/ip.h>
  22
  23 #include <asm/s390_rdev.h>
  24
  25 #include "qeth_core.h"
  26 #include "qeth_core_offl.h"
  27
  28 static int qeth_l2_set_offline(struct ccwgroup_device *);
  29 static int qeth_l2_stop(struct net_device *);
  30 static int qeth_l2_send_delmac(struct qeth_card *, __u8 *);
  31 static int qeth_l2_send_setdelmac(struct qeth_card *, __u8 *,
  32                            enum qeth_ipa_cmds,
  33                            int (*reply_cb) (struct qeth_card *,
  34                                             struct qeth_reply*,
  35                                             unsigned long));
  36 static void qeth_l2_set_multicast_list(struct net_device *);
  37 static int qeth_l2_recover(void *);
  38
  39 static int qeth_l2_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
  40 {
  41         struct qeth_card *card = dev->ml_priv;
  42         struct mii_ioctl_data *mii_data;
  43         int rc = 0;
  44
  45         if (!card)
  46                 return -ENODEV;
  47
  48         if ((card->state != CARD_STATE_UP) &&
  49                 (card->state != CARD_STATE_SOFTSETUP))
  50                 return -ENODEV;
  51
  52         if (card->info.type == QETH_CARD_TYPE_OSN)
  53                 return -EPERM;
  54
  55         switch (cmd) {
  56         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
  57                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
  58                 break;
  59         case SIOC_QETH_GET_CARD_TYPE:
  60                 if ((card->info.type == QETH_CARD_TYPE_OSAE) &&
  61                     !card->info.guestlan)
  62                         return 1;
  63                 return 0;
  64                 break;
  65         case SIOCGMIIPHY:
  66                 mii_data = if_mii(rq);
  67                 mii_data->phy_id = 0;
  68                 break;
  69         case SIOCGMIIREG:
  70                 mii_data = if_mii(rq);
  71                 if (mii_data->phy_id != 0)
  72                         rc = -EINVAL;
  73                 else
  74                         mii_data->val_out = qeth_mdio_read(dev,
  75                                 mii_data->phy_id, mii_data->reg_num);
  76                 break;
  77         default:
  78                 rc = -EOPNOTSUPP;
  79         }
  80         if (rc)
  81                 QETH_DBF_TEXT_(TRACE, 2, "ioce%d", rc);
  82         return rc;
  83 }
  84
  85 static int qeth_l2_verify_dev(struct net_device *dev)
  86 {
  87         struct qeth_card *card;
  88         unsigned long flags;
  89         int rc = 0;
  90
  91         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
  92         list_for_each_entry(card, &qeth_core_card_list.list, list) {
  93                 if (card->dev == dev) {
  94                         rc = QETH_REAL_CARD;
  95                         break;
  96                 }
  97         }
  98         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
  99
 100         return rc;
 101 }
 102
 103 static struct net_device *qeth_l2_netdev_by_devno(unsigned char *read_dev_no)
 104 {
 105         struct qeth_card *card;
 106         struct net_device *ndev;
 107         __u16 temp_dev_no;
 108         unsigned long flags;
 109         struct ccw_dev_id read_devid;
 110
 111         ndev = NULL;
 112         memcpy(&temp_dev_no, read_dev_no, 2);
 113         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
 114         list_for_each_entry(card, &qeth_core_card_list.list, list) {
 115                 ccw_device_get_id(CARD_RDEV(card), &read_devid);
 116                 if (read_devid.devno == temp_dev_no) {
 117                         ndev = card->dev;
 118                         break;
 119                 }
 120         }
 121         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
 122         return ndev;
 123 }
 124
 125 static int qeth_l2_send_setgroupmac_cb(struct qeth_card *card,
 126                                 struct qeth_reply *reply,
 127                                 unsigned long data)
 128 {
 129         struct qeth_ipa_cmd *cmd;
 130         __u8 *mac;
 131
 132         QETH_DBF_TEXT(TRACE, 2, "L2Sgmacb");
 133         cmd = (struct qeth_ipa_cmd *) data;
 134         mac = &cmd->data.setdelmac.mac[0];
 135         /* MAC already registered, needed in couple/uncouple case */
 136         if (cmd->hdr.return_code == 0x2005) {
 137                 QETH_DBF_MESSAGE(2, "Group MAC %pM already existing on %s \n",
 138                           mac, QETH_CARD_IFNAME(card));
 139                 cmd->hdr.return_code = 0;
 140         }
 141         if (cmd->hdr.return_code)
 142                 QETH_DBF_MESSAGE(2, "Could not set group MAC %pM on %s: %x\n",
 143                           mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 144         return 0;
 145 }
 146
 147 static int qeth_l2_send_setgroupmac(struct qeth_card *card, __u8 *mac)
 148 {
 149         QETH_DBF_TEXT(TRACE, 2, "L2Sgmac");
 150         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETGMAC,
 151                                           qeth_l2_send_setgroupmac_cb);
 152 }
 153
 154 static int qeth_l2_send_delgroupmac_cb(struct qeth_card *card,
 155                                 struct qeth_reply *reply,
 156                                 unsigned long data)
 157 {
 158         struct qeth_ipa_cmd *cmd;
 159         __u8 *mac;
 160
 161         QETH_DBF_TEXT(TRACE, 2, "L2Dgmacb");
 162         cmd = (struct qeth_ipa_cmd *) data;
 163         mac = &cmd->data.setdelmac.mac[0];
 164         if (cmd->hdr.return_code)
 165                 QETH_DBF_MESSAGE(2, "Could not delete group MAC %pM on %s: %x\n",
 166                           mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 167         return 0;
 168 }
 169
 170 static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac)
 171 {
 172         QETH_DBF_TEXT(TRACE, 2, "L2Dgmac");
 173         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELGMAC,
 174                                           qeth_l2_send_delgroupmac_cb);
 175 }
 176
 177 static void qeth_l2_add_mc(struct qeth_card *card, __u8 *mac, int vmac)
 178 {
 179         struct qeth_mc_mac *mc;
 180         int rc;
 181
 182         mc = kmalloc(sizeof(struct qeth_mc_mac), GFP_ATOMIC);
 183
 184         if (!mc)
 185                 return;
 186
 187         memcpy(mc->mc_addr, mac, OSA_ADDR_LEN);
 188         mc->mc_addrlen = OSA_ADDR_LEN;
 189         mc->is_vmac = vmac;
 190
 191         if (vmac) {
 192                 rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
 193                                         NULL);
 194         } else {
 195                 rc = qeth_l2_send_setgroupmac(card, mac);
 196         }
 197
 198         if (!rc)
 199                 list_add_tail(&mc->list, &card->mc_list);
 200         else
 201                 kfree(mc);
 202 }
 203
 204 static void qeth_l2_del_all_mc(struct qeth_card *card)
 205 {
 206         struct qeth_mc_mac *mc, *tmp;
 207
 208         spin_lock_bh(&card->mclock);
 209         list_for_each_entry_safe(mc, tmp, &card->mc_list, list) {
 210                 if (mc->is_vmac)
 211                         qeth_l2_send_setdelmac(card, mc->mc_addr,
 212                                         IPA_CMD_DELVMAC, NULL);
 213                 else
 214                         qeth_l2_send_delgroupmac(card, mc->mc_addr);
 215                 list_del(&mc->list);
 216                 kfree(mc);
 217         }
 218         spin_unlock_bh(&card->mclock);
 219 }
 220
 221 static void qeth_l2_get_packet_type(struct qeth_card *card,
 222                         struct qeth_hdr *hdr, struct sk_buff *skb)
 223 {
 224         __u16 hdr_mac;
 225
 226         if (!memcmp(skb->data + QETH_HEADER_SIZE,
 227                     skb->dev->broadcast, 6)) {
 228                 /* broadcast? */
 229                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 230                 return;
 231         }
 232         hdr_mac = *((__u16 *)skb->data);
 233         /* tr multicast? */
 234         switch (card->info.link_type) {
 235         case QETH_LINK_TYPE_HSTR:
 236         case QETH_LINK_TYPE_LANE_TR:
 237                 if ((hdr_mac == QETH_TR_MAC_NC) ||
 238                     (hdr_mac == QETH_TR_MAC_C))
 239                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 240                 else
 241                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 242                 break;
 243                 /* eth or so multicast? */
 244         default:
 245                 if ((hdr_mac == QETH_ETH_MAC_V4) ||
 246                      (hdr_mac == QETH_ETH_MAC_V6))
 247                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 248                 else
 249                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 250         }
 251 }
 252
 253 static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
 254                         struct sk_buff *skb, int ipv, int cast_type)
 255 {
 256         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
 257
 258         memset(hdr, 0, sizeof(struct qeth_hdr));
 259         hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
 260
 261         /* set byte byte 3 to casting flags */
 262         if (cast_type == RTN_MULTICAST)
 263                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 264         else if (cast_type == RTN_BROADCAST)
 265                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 266         else
 267                 qeth_l2_get_packet_type(card, hdr, skb);
 268
 269         hdr->hdr.l2.pkt_length = skb->len-QETH_HEADER_SIZE;
 270         /* VSWITCH relies on the VLAN
 271          * information to be present in
 272          * the QDIO header */
 273         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
 274                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
 275                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
 276         }
 277 }
 278
 279 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
 280                         struct qeth_reply *reply, unsigned long data)
 281 {
 282         struct qeth_ipa_cmd *cmd;
 283
 284         QETH_DBF_TEXT(TRACE, 2, "L2sdvcb");
 285         cmd = (struct qeth_ipa_cmd *) data;
 286         if (cmd->hdr.return_code) {
 287                 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x. "
 288                           "Continuing\n", cmd->data.setdelvlan.vlan_id,
 289                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 290                 QETH_DBF_TEXT_(TRACE, 2, "L2VL%4x", cmd->hdr.command);
 291                 QETH_DBF_TEXT_(TRACE, 2, "L2%s", CARD_BUS_ID(card));
 292                 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
 293         }
 294         return 0;
 295 }
 296
 297 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
 298                                 enum qeth_ipa_cmds ipacmd)
 299 {
 300         struct qeth_ipa_cmd *cmd;
 301         struct qeth_cmd_buffer *iob;
 302
 303         QETH_DBF_TEXT_(TRACE, 4, "L2sdv%x", ipacmd);
 304         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 305         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 306         cmd->data.setdelvlan.vlan_id = i;
 307         return qeth_send_ipa_cmd(card, iob,
 308                                  qeth_l2_send_setdelvlan_cb, NULL);
 309 }
 310
 311 static void qeth_l2_process_vlans(struct qeth_card *card, int clear)
 312 {
 313         struct qeth_vlan_vid *id;
 314         QETH_DBF_TEXT(TRACE, 3, "L2prcvln");
 315         spin_lock_bh(&card->vlanlock);
 316         list_for_each_entry(id, &card->vid_list, list) {
 317                 if (clear)
 318                         qeth_l2_send_setdelvlan(card, id->vid,
 319                                 IPA_CMD_DELVLAN);
 320                 else
 321                         qeth_l2_send_setdelvlan(card, id->vid,
 322                                 IPA_CMD_SETVLAN);
 323         }
 324         spin_unlock_bh(&card->vlanlock);
 325 }
 326
 327 static void qeth_l2_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
 328 {
 329         struct qeth_card *card = dev->ml_priv;
 330         struct qeth_vlan_vid *id;
 331
 332         QETH_DBF_TEXT_(TRACE, 4, "aid:%d", vid);
 333         id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
 334         if (id) {
 335                 id->vid = vid;
 336                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
 337                 spin_lock_bh(&card->vlanlock);
 338                 list_add_tail(&id->list, &card->vid_list);
 339                 spin_unlock_bh(&card->vlanlock);
 340         }
 341 }
 342
 343 static void qeth_l2_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
 344 {
 345         struct qeth_vlan_vid *id, *tmpid = NULL;
 346         struct qeth_card *card = dev->ml_priv;
 347
 348         QETH_DBF_TEXT_(TRACE, 4, "kid:%d", vid);
 349         spin_lock_bh(&card->vlanlock);
 350         list_for_each_entry(id, &card->vid_list, list) {
 351                 if (id->vid == vid) {
 352                         list_del(&id->list);
 353                         tmpid = id;
 354                         break;
 355                 }
 356         }
 357         spin_unlock_bh(&card->vlanlock);
 358         if (tmpid) {
 359                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 360                 kfree(tmpid);
 361         }
 362         qeth_l2_set_multicast_list(card->dev);
 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                 if (!card->use_hard_stop) {
 385                         __u8 *mac = &card->dev->dev_addr[0];
 386                         rc = qeth_l2_send_delmac(card, mac);
 387                         QETH_DBF_TEXT_(SETUP, 2, "Lerr%d", rc);
 388                 }
 389                 card->state = CARD_STATE_SOFTSETUP;
 390         }
 391         if (card->state == CARD_STATE_SOFTSETUP) {
 392                 qeth_l2_process_vlans(card, 1);
 393                 if (!card->use_hard_stop)
 394                         qeth_l2_del_all_mc(card);
 395                 qeth_clear_ipacmd_list(card);
 396                 card->state = CARD_STATE_HARDSETUP;
 397         }
 398         if (card->state == CARD_STATE_HARDSETUP) {
 399                 qeth_qdio_clear_card(card, 0);
 400                 qeth_clear_qdio_buffers(card);
 401                 qeth_clear_working_pool_list(card);
 402                 card->state = CARD_STATE_DOWN;
 403         }
 404         if (card->state == CARD_STATE_DOWN) {
 405                 qeth_clear_cmd_buffers(&card->read);
 406                 qeth_clear_cmd_buffers(&card->write);
 407         }
 408         card->use_hard_stop = 0;
 409         return rc;
 410 }
 411
 412 static void qeth_l2_process_inbound_buffer(struct qeth_card *card,
 413                             struct qeth_qdio_buffer *buf, int index)
 414 {
 415         struct qdio_buffer_element *element;
 416         struct sk_buff *skb;
 417         struct qeth_hdr *hdr;
 418         int offset;
 419         unsigned int len;
 420
 421         /* get first element of current buffer */
 422         element = (struct qdio_buffer_element *)&buf->buffer->element[0];
 423         offset = 0;
 424         if (card->options.performance_stats)
 425                 card->perf_stats.bufs_rec++;
 426         while ((skb = qeth_core_get_next_skb(card, buf->buffer, &element,
 427                                        &offset, &hdr))) {
 428                 skb->dev = card->dev;
 429                 /* is device UP ? */
 430                 if (!(card->dev->flags & IFF_UP)) {
 431                         dev_kfree_skb_any(skb);
 432                         continue;
 433                 }
 434
 435                 switch (hdr->hdr.l2.id) {
 436                 case QETH_HEADER_TYPE_LAYER2:
 437                         skb->pkt_type = PACKET_HOST;
 438                         skb->protocol = eth_type_trans(skb, skb->dev);
 439                         if (card->options.checksum_type == NO_CHECKSUMMING)
 440                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 441                         else
 442                                 skb->ip_summed = CHECKSUM_NONE;
 443                         if (skb->protocol == htons(ETH_P_802_2))
 444                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
 445                         len = skb->len;
 446                         netif_rx(skb);
 447                         break;
 448                 case QETH_HEADER_TYPE_OSN:
 449                         if (card->info.type == QETH_CARD_TYPE_OSN) {
 450                                 skb_push(skb, sizeof(struct qeth_hdr));
 451                                 skb_copy_to_linear_data(skb, hdr,
 452                                                 sizeof(struct qeth_hdr));
 453                                 len = skb->len;
 454                                 card->osn_info.data_cb(skb);
 455                                 break;
 456                         }
 457                         /* else unknown */
 458                 default:
 459                         dev_kfree_skb_any(skb);
 460                         QETH_DBF_TEXT(TRACE, 3, "inbunkno");
 461                         QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
 462                         continue;
 463                 }
 464                 card->dev->last_rx = jiffies;
 465                 card->stats.rx_packets++;
 466                 card->stats.rx_bytes += len;
 467         }
 468 }
 469
 470 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
 471                            enum qeth_ipa_cmds ipacmd,
 472                            int (*reply_cb) (struct qeth_card *,
 473                                             struct qeth_reply*,
 474                                             unsigned long))
 475 {
 476         struct qeth_ipa_cmd *cmd;
 477         struct qeth_cmd_buffer *iob;
 478
 479         QETH_DBF_TEXT(TRACE, 2, "L2sdmac");
 480         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 481         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 482         cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
 483         memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
 484         return qeth_send_ipa_cmd(card, iob, reply_cb, NULL);
 485 }
 486
 487 static int qeth_l2_send_setmac_cb(struct qeth_card *card,
 488                            struct qeth_reply *reply,
 489                            unsigned long data)
 490 {
 491         struct qeth_ipa_cmd *cmd;
 492
 493         QETH_DBF_TEXT(TRACE, 2, "L2Smaccb");
 494         cmd = (struct qeth_ipa_cmd *) data;
 495         if (cmd->hdr.return_code) {
 496                 QETH_DBF_TEXT_(TRACE, 2, "L2er%x", cmd->hdr.return_code);
 497                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 498                 cmd->hdr.return_code = -EIO;
 499         } else {
 500                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 501                 memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
 502                        OSA_ADDR_LEN);
 503                 dev_info(&card->gdev->dev,
 504                         "MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x "
 505                         "successfully registered on device %s\n",
 506                         card->dev->dev_addr[0], card->dev->dev_addr[1],
 507                         card->dev->dev_addr[2], card->dev->dev_addr[3],
 508                         card->dev->dev_addr[4], card->dev->dev_addr[5],
 509                         card->dev->name);
 510         }
 511         return 0;
 512 }
 513
 514 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
 515 {
 516         QETH_DBF_TEXT(TRACE, 2, "L2Setmac");
 517         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
 518                                           qeth_l2_send_setmac_cb);
 519 }
 520
 521 static int qeth_l2_send_delmac_cb(struct qeth_card *card,
 522                            struct qeth_reply *reply,
 523                            unsigned long data)
 524 {
 525         struct qeth_ipa_cmd *cmd;
 526
 527         QETH_DBF_TEXT(TRACE, 2, "L2Dmaccb");
 528         cmd = (struct qeth_ipa_cmd *) data;
 529         if (cmd->hdr.return_code) {
 530                 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
 531                 cmd->hdr.return_code = -EIO;
 532                 return 0;
 533         }
 534         card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 535
 536         return 0;
 537 }
 538
 539 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
 540 {
 541         QETH_DBF_TEXT(TRACE, 2, "L2Delmac");
 542         if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
 543                 return 0;
 544         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
 545                                           qeth_l2_send_delmac_cb);
 546 }
 547
 548 static int qeth_l2_request_initial_mac(struct qeth_card *card)
 549 {
 550         int rc = 0;
 551         char vendor_pre[] = {0x02, 0x00, 0x00};
 552
 553         QETH_DBF_TEXT(SETUP, 2, "doL2init");
 554         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
 555
 556         rc = qeth_query_setadapterparms(card);
 557         if (rc) {
 558                 QETH_DBF_MESSAGE(2, "could not query adapter parameters on "
 559                         "device %s: x%x\n", CARD_BUS_ID(card), rc);
 560         }
 561
 562         if ((card->info.type == QETH_CARD_TYPE_IQD) ||
 563             (card->info.guestlan)) {
 564                 rc = qeth_setadpparms_change_macaddr(card);
 565                 if (rc) {
 566                         QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
 567                                 "device %s: x%x\n", CARD_BUS_ID(card), rc);
 568                         QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 569                         return rc;
 570                 }
 571                 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN);
 572         } else {
 573                 random_ether_addr(card->dev->dev_addr);
 574                 memcpy(card->dev->dev_addr, vendor_pre, 3);
 575         }
 576         return 0;
 577 }
 578
 579 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 580 {
 581         struct sockaddr *addr = p;
 582         struct qeth_card *card = dev->ml_priv;
 583         int rc = 0;
 584
 585         QETH_DBF_TEXT(TRACE, 3, "setmac");
 586
 587         if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
 588                 QETH_DBF_TEXT(TRACE, 3, "setmcINV");
 589                 return -EOPNOTSUPP;
 590         }
 591
 592         if (card->info.type == QETH_CARD_TYPE_OSN) {
 593                 QETH_DBF_TEXT(TRACE, 3, "setmcOSN");
 594                 return -EOPNOTSUPP;
 595         }
 596         QETH_DBF_TEXT_(TRACE, 3, "%s", CARD_BUS_ID(card));
 597         QETH_DBF_HEX(TRACE, 3, addr->sa_data, OSA_ADDR_LEN);
 598         rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
 599         if (!rc)
 600                 rc = qeth_l2_send_setmac(card, addr->sa_data);
 601         return rc;
 602 }
 603
 604 static void qeth_l2_set_multicast_list(struct net_device *dev)
 605 {
 606         struct qeth_card *card = dev->ml_priv;
 607         struct dev_addr_list *dm;
 608
 609         if (card->info.type == QETH_CARD_TYPE_OSN)
 610                 return ;
 611
 612         QETH_DBF_TEXT(TRACE, 3, "setmulti");
 613         qeth_l2_del_all_mc(card);
 614         spin_lock_bh(&card->mclock);
 615         for (dm = dev->mc_list; dm; dm = dm->next)
 616                 qeth_l2_add_mc(card, dm->da_addr, 0);
 617
 618         for (dm = dev->uc_list; dm; dm = dm->next)
 619                 qeth_l2_add_mc(card, dm->da_addr, 1);
 620
 621         spin_unlock_bh(&card->mclock);
 622         if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
 623                 return;
 624         qeth_setadp_promisc_mode(card);
 625 }
 626
 627 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 628 {
 629         int rc;
 630         struct qeth_hdr *hdr = NULL;
 631         int elements = 0;
 632         struct qeth_card *card = dev->ml_priv;
 633         struct sk_buff *new_skb = skb;
 634         int ipv = qeth_get_ip_version(skb);
 635         int cast_type = qeth_get_cast_type(card, skb);
 636         struct qeth_qdio_out_q *queue = card->qdio.out_qs
 637                 [qeth_get_priority_queue(card, skb, ipv, cast_type)];
 638         int tx_bytes = skb->len;
 639         enum qeth_large_send_types large_send = QETH_LARGE_SEND_NO;
 640         struct qeth_eddp_context *ctx = NULL;
 641         int data_offset = -1;
 642         int elements_needed = 0;
 643         int hd_len = 0;
 644
 645         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
 646                 card->stats.tx_carrier_errors++;
 647                 goto tx_drop;
 648         }
 649
 650         if ((card->info.type == QETH_CARD_TYPE_OSN) &&
 651             (skb->protocol == htons(ETH_P_IPV6)))
 652                 goto tx_drop;
 653
 654         if (card->options.performance_stats) {
 655                 card->perf_stats.outbound_cnt++;
 656                 card->perf_stats.outbound_start_time = qeth_get_micros();
 657         }
 658         netif_stop_queue(dev);
 659
 660         if (skb_is_gso(skb))
 661                 large_send = QETH_LARGE_SEND_EDDP;
 662
 663         if (card->info.type == QETH_CARD_TYPE_OSN)
 664                 hdr = (struct qeth_hdr *)skb->data;
 665         else {
 666                 if ((card->info.type == QETH_CARD_TYPE_IQD) && (!large_send) &&
 667                     (skb_shinfo(skb)->nr_frags == 0)) {
 668                         new_skb = skb;
 669                         data_offset = ETH_HLEN;
 670                         hd_len = ETH_HLEN;
 671                         hdr = kmem_cache_alloc(qeth_core_header_cache,
 672                                                 GFP_ATOMIC);
 673                         if (!hdr)
 674                                 goto tx_drop;
 675                         elements_needed++;
 676                         skb_reset_mac_header(new_skb);
 677                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 678                         hdr->hdr.l2.pkt_length = new_skb->len;
 679                         memcpy(((char *)hdr) + sizeof(struct qeth_hdr),
 680                                 skb_mac_header(new_skb), ETH_HLEN);
 681                 } else {
 682                         /* create a clone with writeable headroom */
 683                         new_skb = skb_realloc_headroom(skb,
 684                                                 sizeof(struct qeth_hdr));
 685                         if (!new_skb)
 686                                 goto tx_drop;
 687                         hdr = (struct qeth_hdr *)skb_push(new_skb,
 688                                                 sizeof(struct qeth_hdr));
 689                         skb_set_mac_header(new_skb, sizeof(struct qeth_hdr));
 690                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 691                 }
 692         }
 693
 694         if (large_send == QETH_LARGE_SEND_EDDP) {
 695                 ctx = qeth_eddp_create_context(card, new_skb, hdr,
 696                                                 skb->sk->sk_protocol);
 697                 if (ctx == NULL) {
 698                         QETH_DBF_MESSAGE(2, "could not create eddp context\n");
 699                         goto tx_drop;
 700                 }
 701         } else {
 702                 elements = qeth_get_elements_no(card, (void *)hdr, new_skb,
 703                                                 elements_needed);
 704                 if (!elements) {
 705                         if (data_offset >= 0)
 706                                 kmem_cache_free(qeth_core_header_cache, hdr);
 707                         goto tx_drop;
 708                 }
 709         }
 710
 711         if ((large_send == QETH_LARGE_SEND_NO) &&
 712             (skb->ip_summed == CHECKSUM_PARTIAL))
 713                 qeth_tx_csum(new_skb);
 714
 715         if (card->info.type != QETH_CARD_TYPE_IQD)
 716                 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
 717                                          elements, ctx);
 718         else
 719                 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
 720                                         elements, ctx, data_offset, hd_len);
 721         if (!rc) {
 722                 card->stats.tx_packets++;
 723                 card->stats.tx_bytes += tx_bytes;
 724                 if (new_skb != skb)
 725                         dev_kfree_skb_any(skb);
 726                 if (card->options.performance_stats) {
 727                         if (large_send != QETH_LARGE_SEND_NO) {
 728                                 card->perf_stats.large_send_bytes += tx_bytes;
 729                                 card->perf_stats.large_send_cnt++;
 730                         }
 731                         if (skb_shinfo(new_skb)->nr_frags > 0) {
 732                                 card->perf_stats.sg_skbs_sent++;
 733                                 /* nr_frags + skb->data */
 734                                 card->perf_stats.sg_frags_sent +=
 735                                         skb_shinfo(new_skb)->nr_frags + 1;
 736                         }
 737                 }
 738
 739                 if (ctx != NULL) {
 740                         qeth_eddp_put_context(ctx);
 741                         dev_kfree_skb_any(new_skb);
 742                 }
 743         } else {
 744                 if (ctx != NULL)
 745                         qeth_eddp_put_context(ctx);
 746
 747                 if (data_offset >= 0)
 748                         kmem_cache_free(qeth_core_header_cache, hdr);
 749
 750                 if (rc == -EBUSY) {
 751                         if (new_skb != skb)
 752                                 dev_kfree_skb_any(new_skb);
 753                         return NETDEV_TX_BUSY;
 754                 } else
 755                         goto tx_drop;
 756         }
 757
 758         netif_wake_queue(dev);
 759         if (card->options.performance_stats)
 760                 card->perf_stats.outbound_time += qeth_get_micros() -
 761                         card->perf_stats.outbound_start_time;
 762         return rc;
 763
 764 tx_drop:
 765         card->stats.tx_dropped++;
 766         card->stats.tx_errors++;
 767         if ((new_skb != skb) && new_skb)
 768                 dev_kfree_skb_any(new_skb);
 769         dev_kfree_skb_any(skb);
 770         netif_wake_queue(dev);
 771         return NETDEV_TX_OK;
 772 }
 773
 774 static void qeth_l2_qdio_input_handler(struct ccw_device *ccwdev,
 775                         unsigned int qdio_err, unsigned int queue,
 776                         int first_element, int count, unsigned long card_ptr)
 777 {
 778         struct net_device *net_dev;
 779         struct qeth_card *card;
 780         struct qeth_qdio_buffer *buffer;
 781         int index;
 782         int i;
 783
 784         card = (struct qeth_card *) card_ptr;
 785         net_dev = card->dev;
 786         if (card->options.performance_stats) {
 787                 card->perf_stats.inbound_cnt++;
 788                 card->perf_stats.inbound_start_time = qeth_get_micros();
 789         }
 790         if (qdio_err & QDIO_ERROR_ACTIVATE_CHECK_CONDITION) {
 791                 QETH_DBF_TEXT(TRACE, 1, "qdinchk");
 792                 QETH_DBF_TEXT_(TRACE, 1, "%s", CARD_BUS_ID(card));
 793                 QETH_DBF_TEXT_(TRACE, 1, "%04X%04X", first_element,
 794                                 count);
 795                 QETH_DBF_TEXT_(TRACE, 1, "%04X", queue);
 796                 qeth_schedule_recovery(card);
 797                 return;
 798         }
 799         for (i = first_element; i < (first_element + count); ++i) {
 800                 index = i % QDIO_MAX_BUFFERS_PER_Q;
 801                 buffer = &card->qdio.in_q->bufs[index];
 802                 if (!(qdio_err &&
 803                       qeth_check_qdio_errors(buffer->buffer, qdio_err, "qinerr")))
 804                         qeth_l2_process_inbound_buffer(card, buffer, index);
 805                 /* clear buffer and give back to hardware */
 806                 qeth_put_buffer_pool_entry(card, buffer->pool_entry);
 807                 qeth_queue_input_buffer(card, index);
 808         }
 809         if (card->options.performance_stats)
 810                 card->perf_stats.inbound_time += qeth_get_micros() -
 811                         card->perf_stats.inbound_start_time;
 812 }
 813
 814 static int qeth_l2_open(struct net_device *dev)
 815 {
 816         struct qeth_card *card = dev->ml_priv;
 817
 818         QETH_DBF_TEXT(TRACE, 4, "qethopen");
 819         if (card->state != CARD_STATE_SOFTSETUP)
 820                 return -ENODEV;
 821
 822         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
 823              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
 824                 QETH_DBF_TEXT(TRACE, 4, "nomacadr");
 825                 return -EPERM;
 826         }
 827         card->data.state = CH_STATE_UP;
 828         card->state = CARD_STATE_UP;
 829         netif_start_queue(dev);
 830
 831         if (!card->lan_online && netif_carrier_ok(dev))
 832                 netif_carrier_off(dev);
 833         return 0;
 834 }
 835
 836
 837 static int qeth_l2_stop(struct net_device *dev)
 838 {
 839         struct qeth_card *card = dev->ml_priv;
 840
 841         QETH_DBF_TEXT(TRACE, 4, "qethstop");
 842         netif_tx_disable(dev);
 843         if (card->state == CARD_STATE_UP)
 844                 card->state = CARD_STATE_SOFTSETUP;
 845         return 0;
 846 }
 847
 848 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 849 {
 850         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 851
 852         INIT_LIST_HEAD(&card->vid_list);
 853         INIT_LIST_HEAD(&card->mc_list);
 854         card->options.layer2 = 1;
 855         card->discipline.input_handler = (qdio_handler_t *)
 856                 qeth_l2_qdio_input_handler;
 857         card->discipline.output_handler = (qdio_handler_t *)
 858                 qeth_qdio_output_handler;
 859         card->discipline.recover = qeth_l2_recover;
 860         return 0;
 861 }
 862
 863 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
 864 {
 865         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
 866
 867         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 868
 869         if (cgdev->state == CCWGROUP_ONLINE) {
 870                 card->use_hard_stop = 1;
 871                 qeth_l2_set_offline(cgdev);
 872         }
 873
 874         if (card->dev) {
 875                 unregister_netdev(card->dev);
 876                 card->dev = NULL;
 877         }
 878
 879         qeth_l2_del_all_mc(card);
 880         return;
 881 }
 882
 883 static int qeth_l2_ethtool_set_tso(struct net_device *dev, u32 data)
 884 {
 885         struct qeth_card *card = dev->ml_priv;
 886
 887         if (data) {
 888                 if (card->options.large_send == QETH_LARGE_SEND_NO) {
 889                         card->options.large_send = QETH_LARGE_SEND_EDDP;
 890                         dev->features |= NETIF_F_TSO;
 891                 }
 892         } else {
 893                 dev->features &= ~NETIF_F_TSO;
 894                 card->options.large_send = QETH_LARGE_SEND_NO;
 895         }
 896         return 0;
 897 }
 898
 899 static struct ethtool_ops qeth_l2_ethtool_ops = {
 900         .get_link = ethtool_op_get_link,
 901         .get_tx_csum = ethtool_op_get_tx_csum,
 902         .set_tx_csum = ethtool_op_set_tx_hw_csum,
 903         .get_sg = ethtool_op_get_sg,
 904         .set_sg = ethtool_op_set_sg,
 905         .get_tso = ethtool_op_get_tso,
 906         .set_tso = qeth_l2_ethtool_set_tso,
 907         .get_strings = qeth_core_get_strings,
 908         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 909         .get_stats_count = qeth_core_get_stats_count,
 910         .get_drvinfo = qeth_core_get_drvinfo,
 911         .get_settings = qeth_core_ethtool_get_settings,
 912 };
 913
 914 static struct ethtool_ops qeth_l2_osn_ops = {
 915         .get_strings = qeth_core_get_strings,
 916         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 917         .get_stats_count = qeth_core_get_stats_count,
 918         .get_drvinfo = qeth_core_get_drvinfo,
 919 };
 920
 921 static int qeth_l2_setup_netdev(struct qeth_card *card)
 922 {
 923         switch (card->info.type) {
 924         case QETH_CARD_TYPE_OSAE:
 925                 card->dev = alloc_etherdev(0);
 926                 break;
 927         case QETH_CARD_TYPE_IQD:
 928                 card->dev = alloc_netdev(0, "hsi%d", ether_setup);
 929                 break;
 930         case QETH_CARD_TYPE_OSN:
 931                 card->dev = alloc_netdev(0, "osn%d", ether_setup);
 932                 card->dev->flags |= IFF_NOARP;
 933                 break;
 934         default:
 935                 card->dev = alloc_etherdev(0);
 936         }
 937
 938         if (!card->dev)
 939                 return -ENODEV;
 940
 941         card->dev->ml_priv = card;
 942         card->dev->tx_timeout = &qeth_tx_timeout;
 943         card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
 944         card->dev->open = qeth_l2_open;
 945         card->dev->stop = qeth_l2_stop;
 946         card->dev->hard_start_xmit = qeth_l2_hard_start_xmit;
 947         card->dev->do_ioctl = qeth_l2_do_ioctl;
 948         card->dev->get_stats = qeth_get_stats;
 949         card->dev->change_mtu = qeth_change_mtu;
 950         card->dev->set_multicast_list = qeth_l2_set_multicast_list;
 951         card->dev->vlan_rx_kill_vid = qeth_l2_vlan_rx_kill_vid;
 952         card->dev->vlan_rx_add_vid = qeth_l2_vlan_rx_add_vid;
 953         card->dev->set_mac_address = qeth_l2_set_mac_address;
 954         card->dev->mtu = card->info.initial_mtu;
 955         if (card->info.type != QETH_CARD_TYPE_OSN)
 956                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops);
 957         else
 958                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops);
 959         card->dev->features |= NETIF_F_HW_VLAN_FILTER;
 960         card->info.broadcast_capable = 1;
 961         qeth_l2_request_initial_mac(card);
 962         SET_NETDEV_DEV(card->dev, &card->gdev->dev);
 963         return register_netdev(card->dev);
 964 }
 965
 966 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 967 {
 968         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 969         int rc = 0;
 970         enum qeth_card_states recover_flag;
 971
 972         BUG_ON(!card);
 973         QETH_DBF_TEXT(SETUP, 2, "setonlin");
 974         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 975
 976         qeth_set_allowed_threads(card, QETH_RECOVER_THREAD, 1);
 977         recover_flag = card->state;
 978         rc = ccw_device_set_online(CARD_RDEV(card));
 979         if (rc) {
 980                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 981                 return -EIO;
 982         }
 983         rc = ccw_device_set_online(CARD_WDEV(card));
 984         if (rc) {
 985                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 986                 return -EIO;
 987         }
 988         rc = ccw_device_set_online(CARD_DDEV(card));
 989         if (rc) {
 990                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 991                 return -EIO;
 992         }
 993
 994         rc = qeth_core_hardsetup_card(card);
 995         if (rc) {
 996                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
 997                 goto out_remove;
 998         }
 999
1000         if (!card->dev && qeth_l2_setup_netdev(card))
1001                 goto out_remove;
1002
1003         if (card->info.type != QETH_CARD_TYPE_OSN)
1004                 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
1005
1006         card->state = CARD_STATE_HARDSETUP;
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                 }
1020                 return rc;
1021         } else
1022                 card->lan_online = 1;
1023
1024         if (card->info.type != QETH_CARD_TYPE_OSN) {
1025                 qeth_set_large_send(card, card->options.large_send);
1026                 qeth_l2_process_vlans(card, 0);
1027         }
1028
1029         netif_tx_disable(card->dev);
1030
1031         rc = qeth_init_qdio_queues(card);
1032         if (rc) {
1033                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1034                 goto out_remove;
1035         }
1036         card->state = CARD_STATE_SOFTSETUP;
1037         netif_carrier_on(card->dev);
1038
1039         qeth_set_allowed_threads(card, 0xffffffff, 0);
1040         if (recover_flag == CARD_STATE_RECOVER) {
1041                 if (recovery_mode &&
1042                     card->info.type != QETH_CARD_TYPE_OSN) {
1043                         qeth_l2_open(card->dev);
1044                 } else {
1045                         rtnl_lock();
1046                         dev_open(card->dev);
1047                         rtnl_unlock();
1048                 }
1049                 /* this also sets saved unicast addresses */
1050                 qeth_l2_set_multicast_list(card->dev);
1051         }
1052         /* let user_space know that device is online */
1053         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1054         return 0;
1055 out_remove:
1056         card->use_hard_stop = 1;
1057         qeth_l2_stop_card(card, 0);
1058         ccw_device_set_offline(CARD_DDEV(card));
1059         ccw_device_set_offline(CARD_WDEV(card));
1060         ccw_device_set_offline(CARD_RDEV(card));
1061         if (recover_flag == CARD_STATE_RECOVER)
1062                 card->state = CARD_STATE_RECOVER;
1063         else
1064                 card->state = CARD_STATE_DOWN;
1065         return -ENODEV;
1066 }
1067
1068 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1069 {
1070         return __qeth_l2_set_online(gdev, 0);
1071 }
1072
1073 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1074                                         int recovery_mode)
1075 {
1076         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1077         int rc = 0, rc2 = 0, rc3 = 0;
1078         enum qeth_card_states recover_flag;
1079
1080         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1081         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1082
1083         if (card->dev && netif_carrier_ok(card->dev))
1084                 netif_carrier_off(card->dev);
1085         recover_flag = card->state;
1086         qeth_l2_stop_card(card, recovery_mode);
1087         rc  = ccw_device_set_offline(CARD_DDEV(card));
1088         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1089         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1090         if (!rc)
1091                 rc = (rc2) ? rc2 : rc3;
1092         if (rc)
1093                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1094         if (recover_flag == CARD_STATE_UP)
1095                 card->state = CARD_STATE_RECOVER;
1096         /* let user_space know that device is offline */
1097         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1098         return 0;
1099 }
1100
1101 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1102 {
1103         return __qeth_l2_set_offline(cgdev, 0);
1104 }
1105
1106 static int qeth_l2_recover(void *ptr)
1107 {
1108         struct qeth_card *card;
1109         int rc = 0;
1110
1111         card = (struct qeth_card *) ptr;
1112         QETH_DBF_TEXT(TRACE, 2, "recover1");
1113         QETH_DBF_HEX(TRACE, 2, &card, sizeof(void *));
1114         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1115                 return 0;
1116         QETH_DBF_TEXT(TRACE, 2, "recover2");
1117         dev_warn(&card->gdev->dev,
1118                 "A recovery process has been started for the device\n");
1119         card->use_hard_stop = 1;
1120         __qeth_l2_set_offline(card->gdev, 1);
1121         rc = __qeth_l2_set_online(card->gdev, 1);
1122         /* don't run another scheduled recovery */
1123         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1124         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1125         if (!rc)
1126                 dev_info(&card->gdev->dev,
1127                         "Device successfully recovered!\n");
1128         else {
1129                 rtnl_lock();
1130                 dev_close(card->dev);
1131                 rtnl_unlock();
1132                 dev_warn(&card->gdev->dev, "The qeth device driver "
1133                         "failed to recover an error on the device\n");
1134         }
1135         return 0;
1136 }
1137
1138 static int __init qeth_l2_init(void)
1139 {
1140         pr_info("register layer 2 discipline\n");
1141         return 0;
1142 }
1143
1144 static void __exit qeth_l2_exit(void)
1145 {
1146         pr_info("unregister layer 2 discipline\n");
1147 }
1148
1149 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1150 {
1151         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1152         qeth_qdio_clear_card(card, 0);
1153         qeth_clear_qdio_buffers(card);
1154 }
1155
1156 struct ccwgroup_driver qeth_l2_ccwgroup_driver = {
1157         .probe = qeth_l2_probe_device,
1158         .remove = qeth_l2_remove_device,
1159         .set_online = qeth_l2_set_online,
1160         .set_offline = qeth_l2_set_offline,
1161         .shutdown = qeth_l2_shutdown,
1162 };
1163 EXPORT_SYMBOL_GPL(qeth_l2_ccwgroup_driver);
1164
1165 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1166                            struct qeth_cmd_buffer *iob)
1167 {
1168         unsigned long flags;
1169         int rc = 0;
1170
1171         QETH_DBF_TEXT(TRACE, 5, "osndctrd");
1172
1173         wait_event(card->wait_q,
1174                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1175         qeth_prepare_control_data(card, len, iob);
1176         QETH_DBF_TEXT(TRACE, 6, "osnoirqp");
1177         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1178         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1179                               (addr_t) iob, 0, 0);
1180         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1181         if (rc) {
1182                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1183                            "ccw_device_start rc = %i\n", rc);
1184                 QETH_DBF_TEXT_(TRACE, 2, " err%d", rc);
1185                 qeth_release_buffer(iob->channel, iob);
1186                 atomic_set(&card->write.irq_pending, 0);
1187                 wake_up(&card->wait_q);
1188         }
1189         return rc;
1190 }
1191
1192 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1193                         struct qeth_cmd_buffer *iob, int data_len)
1194 {
1195         u16 s1, s2;
1196
1197         QETH_DBF_TEXT(TRACE, 4, "osndipa");
1198
1199         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1200         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1201         s2 = (u16)data_len;
1202         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1203         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1204         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1205         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1206         return qeth_osn_send_control_data(card, s1, iob);
1207 }
1208
1209 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1210 {
1211         struct qeth_cmd_buffer *iob;
1212         struct qeth_card *card;
1213         int rc;
1214
1215         QETH_DBF_TEXT(TRACE, 2, "osnsdmc");
1216         if (!dev)
1217                 return -ENODEV;
1218         card = dev->ml_priv;
1219         if (!card)
1220                 return -ENODEV;
1221         if ((card->state != CARD_STATE_UP) &&
1222             (card->state != CARD_STATE_SOFTSETUP))
1223                 return -ENODEV;
1224         iob = qeth_wait_for_buffer(&card->write);
1225         memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1226         rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1227         return rc;
1228 }
1229 EXPORT_SYMBOL(qeth_osn_assist);
1230
1231 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1232                   int (*assist_cb)(struct net_device *, void *),
1233                   int (*data_cb)(struct sk_buff *))
1234 {
1235         struct qeth_card *card;
1236
1237         QETH_DBF_TEXT(TRACE, 2, "osnreg");
1238         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1239         if (*dev == NULL)
1240                 return -ENODEV;
1241         card = (*dev)->ml_priv;
1242         if (!card)
1243                 return -ENODEV;
1244         if ((assist_cb == NULL) || (data_cb == NULL))
1245                 return -EINVAL;
1246         card->osn_info.assist_cb = assist_cb;
1247         card->osn_info.data_cb = data_cb;
1248         return 0;
1249 }
1250 EXPORT_SYMBOL(qeth_osn_register);
1251
1252 void qeth_osn_deregister(struct net_device *dev)
1253 {
1254         struct qeth_card *card;
1255
1256         QETH_DBF_TEXT(TRACE, 2, "osndereg");
1257         if (!dev)
1258                 return;
1259         card = dev->ml_priv;
1260         if (!card)
1261                 return;
1262         card->osn_info.assist_cb = NULL;
1263         card->osn_info.data_cb = NULL;
1264         return;
1265 }
1266 EXPORT_SYMBOL(qeth_osn_deregister);
1267
1268 module_init(qeth_l2_init);
1269 module_exit(qeth_l2_exit);
1270 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1271 MODULE_DESCRIPTION("qeth layer 2 discipline");
1272 MODULE_LICENSE("GPL");