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   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 #include <linux/module.h>
  12 #include <linux/moduleparam.h>
  13 #include <linux/string.h>
  14 #include <linux/errno.h>
  15 #include <linux/kernel.h>
  16 #include <linux/etherdevice.h>
  17 #include <linux/mii.h>
  18 #include <linux/ip.h>
  19
  20 #include <asm/s390_rdev.h>
  21
  22 #include "qeth_core.h"
  23 #include "qeth_core_offl.h"
  24
  25 static int qeth_l2_set_offline(struct ccwgroup_device *);
  26 static int qeth_l2_stop(struct net_device *);
  27 static int qeth_l2_send_delmac(struct qeth_card *, __u8 *);
  28 static int qeth_l2_send_setdelmac(struct qeth_card *, __u8 *,
  29                            enum qeth_ipa_cmds,
  30                            int (*reply_cb) (struct qeth_card *,
  31                                             struct qeth_reply*,
  32                                             unsigned long));
  33 static void qeth_l2_set_multicast_list(struct net_device *);
  34 static int qeth_l2_recover(void *);
  35
  36 static int qeth_l2_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
  37 {
  38         struct qeth_card *card = dev->ml_priv;
  39         struct mii_ioctl_data *mii_data;
  40         int rc = 0;
  41
  42         if (!card)
  43                 return -ENODEV;
  44
  45         if ((card->state != CARD_STATE_UP) &&
  46                 (card->state != CARD_STATE_SOFTSETUP))
  47                 return -ENODEV;
  48
  49         if (card->info.type == QETH_CARD_TYPE_OSN)
  50                 return -EPERM;
  51
  52         switch (cmd) {
  53         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
  54                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
  55                 break;
  56         case SIOC_QETH_GET_CARD_TYPE:
  57                 if ((card->info.type == QETH_CARD_TYPE_OSAE) &&
  58                     !card->info.guestlan)
  59                         return 1;
  60                 return 0;
  61                 break;
  62         case SIOCGMIIPHY:
  63                 mii_data = if_mii(rq);
  64                 mii_data->phy_id = 0;
  65                 break;
  66         case SIOCGMIIREG:
  67                 mii_data = if_mii(rq);
  68                 if (mii_data->phy_id != 0)
  69                         rc = -EINVAL;
  70                 else
  71                         mii_data->val_out = qeth_mdio_read(dev,
  72                                 mii_data->phy_id, mii_data->reg_num);
  73                 break;
  74         default:
  75                 rc = -EOPNOTSUPP;
  76         }
  77         if (rc)
  78                 QETH_DBF_TEXT_(TRACE, 2, "ioce%d", rc);
  79         return rc;
  80 }
  81
  82 static int qeth_l2_verify_dev(struct net_device *dev)
  83 {
  84         struct qeth_card *card;
  85         unsigned long flags;
  86         int rc = 0;
  87
  88         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
  89         list_for_each_entry(card, &qeth_core_card_list.list, list) {
  90                 if (card->dev == dev) {
  91                         rc = QETH_REAL_CARD;
  92                         break;
  93                 }
  94         }
  95         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
  96
  97         return rc;
  98 }
  99
 100 static struct net_device *qeth_l2_netdev_by_devno(unsigned char *read_dev_no)
 101 {
 102         struct qeth_card *card;
 103         struct net_device *ndev;
 104         __u16 temp_dev_no;
 105         unsigned long flags;
 106         struct ccw_dev_id read_devid;
 107
 108         ndev = NULL;
 109         memcpy(&temp_dev_no, read_dev_no, 2);
 110         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
 111         list_for_each_entry(card, &qeth_core_card_list.list, list) {
 112                 ccw_device_get_id(CARD_RDEV(card), &read_devid);
 113                 if (read_devid.devno == temp_dev_no) {
 114                         ndev = card->dev;
 115                         break;
 116                 }
 117         }
 118         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
 119         return ndev;
 120 }
 121
 122 static int qeth_l2_send_setgroupmac_cb(struct qeth_card *card,
 123                                 struct qeth_reply *reply,
 124                                 unsigned long data)
 125 {
 126         struct qeth_ipa_cmd *cmd;
 127         __u8 *mac;
 128
 129         QETH_DBF_TEXT(TRACE, 2, "L2Sgmacb");
 130         cmd = (struct qeth_ipa_cmd *) data;
 131         mac = &cmd->data.setdelmac.mac[0];
 132         /* MAC already registered, needed in couple/uncouple case */
 133         if (cmd->hdr.return_code == 0x2005) {
 134                 QETH_DBF_MESSAGE(2, "Group MAC %02x:%02x:%02x:%02x:%02x:%02x "
 135                           "already existing on %s \n",
 136                           mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
 137                           QETH_CARD_IFNAME(card));
 138                 cmd->hdr.return_code = 0;
 139         }
 140         if (cmd->hdr.return_code)
 141                 QETH_DBF_MESSAGE(2, "Could not set group MAC "
 142                           "%02x:%02x:%02x:%02x:%02x:%02x on %s: %x\n",
 143                           mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
 144                           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_DBF_TEXT(TRACE, 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_DBF_TEXT(TRACE, 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 "
 167                           "%02x:%02x:%02x:%02x:%02x:%02x on %s: %x\n",
 168                           mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
 169                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 170         return 0;
 171 }
 172
 173 static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac)
 174 {
 175         QETH_DBF_TEXT(TRACE, 2, "L2Dgmac");
 176         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELGMAC,
 177                                           qeth_l2_send_delgroupmac_cb);
 178 }
 179
 180 static void qeth_l2_add_mc(struct qeth_card *card, __u8 *mac)
 181 {
 182         struct qeth_mc_mac *mc;
 183
 184         mc = kmalloc(sizeof(struct qeth_mc_mac), GFP_ATOMIC);
 185
 186         if (!mc)
 187                 return;
 188
 189         memcpy(mc->mc_addr, mac, OSA_ADDR_LEN);
 190         mc->mc_addrlen = OSA_ADDR_LEN;
 191
 192         if (!qeth_l2_send_setgroupmac(card, mac))
 193                 list_add_tail(&mc->list, &card->mc_list);
 194         else
 195                 kfree(mc);
 196 }
 197
 198 static void qeth_l2_del_all_mc(struct qeth_card *card)
 199 {
 200         struct qeth_mc_mac *mc, *tmp;
 201
 202         spin_lock_bh(&card->mclock);
 203         list_for_each_entry_safe(mc, tmp, &card->mc_list, list) {
 204                 qeth_l2_send_delgroupmac(card, mc->mc_addr);
 205                 list_del(&mc->list);
 206                 kfree(mc);
 207         }
 208         spin_unlock_bh(&card->mclock);
 209 }
 210
 211 static void qeth_l2_get_packet_type(struct qeth_card *card,
 212                         struct qeth_hdr *hdr, struct sk_buff *skb)
 213 {
 214         __u16 hdr_mac;
 215
 216         if (!memcmp(skb->data + QETH_HEADER_SIZE,
 217                     skb->dev->broadcast, 6)) {
 218                 /* broadcast? */
 219                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 220                 return;
 221         }
 222         hdr_mac = *((__u16 *)skb->data);
 223         /* tr multicast? */
 224         switch (card->info.link_type) {
 225         case QETH_LINK_TYPE_HSTR:
 226         case QETH_LINK_TYPE_LANE_TR:
 227                 if ((hdr_mac == QETH_TR_MAC_NC) ||
 228                     (hdr_mac == QETH_TR_MAC_C))
 229                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 230                 else
 231                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 232                 break;
 233                 /* eth or so multicast? */
 234         default:
 235                 if ((hdr_mac == QETH_ETH_MAC_V4) ||
 236                      (hdr_mac == QETH_ETH_MAC_V6))
 237                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 238                 else
 239                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 240         }
 241 }
 242
 243 static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
 244                         struct sk_buff *skb, int ipv, int cast_type)
 245 {
 246         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
 247
 248         memset(hdr, 0, sizeof(struct qeth_hdr));
 249         hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
 250
 251         /* set byte byte 3 to casting flags */
 252         if (cast_type == RTN_MULTICAST)
 253                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 254         else if (cast_type == RTN_BROADCAST)
 255                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 256         else
 257                 qeth_l2_get_packet_type(card, hdr, skb);
 258
 259         hdr->hdr.l2.pkt_length = skb->len-QETH_HEADER_SIZE;
 260         /* VSWITCH relies on the VLAN
 261          * information to be present in
 262          * the QDIO header */
 263         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
 264                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
 265                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
 266         }
 267 }
 268
 269 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
 270                         struct qeth_reply *reply, unsigned long data)
 271 {
 272         struct qeth_ipa_cmd *cmd;
 273
 274         QETH_DBF_TEXT(TRACE, 2, "L2sdvcb");
 275         cmd = (struct qeth_ipa_cmd *) data;
 276         if (cmd->hdr.return_code) {
 277                 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x. "
 278                           "Continuing\n", cmd->data.setdelvlan.vlan_id,
 279                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 280                 QETH_DBF_TEXT_(TRACE, 2, "L2VL%4x", cmd->hdr.command);
 281                 QETH_DBF_TEXT_(TRACE, 2, "L2%s", CARD_BUS_ID(card));
 282                 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
 283         }
 284         return 0;
 285 }
 286
 287 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
 288                                 enum qeth_ipa_cmds ipacmd)
 289 {
 290         struct qeth_ipa_cmd *cmd;
 291         struct qeth_cmd_buffer *iob;
 292
 293         QETH_DBF_TEXT_(TRACE, 4, "L2sdv%x", ipacmd);
 294         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 295         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 296         cmd->data.setdelvlan.vlan_id = i;
 297         return qeth_send_ipa_cmd(card, iob,
 298                                  qeth_l2_send_setdelvlan_cb, NULL);
 299 }
 300
 301 static void qeth_l2_process_vlans(struct qeth_card *card, int clear)
 302 {
 303         struct qeth_vlan_vid *id;
 304         QETH_DBF_TEXT(TRACE, 3, "L2prcvln");
 305         spin_lock_bh(&card->vlanlock);
 306         list_for_each_entry(id, &card->vid_list, list) {
 307                 if (clear)
 308                         qeth_l2_send_setdelvlan(card, id->vid,
 309                                 IPA_CMD_DELVLAN);
 310                 else
 311                         qeth_l2_send_setdelvlan(card, id->vid,
 312                                 IPA_CMD_SETVLAN);
 313         }
 314         spin_unlock_bh(&card->vlanlock);
 315 }
 316
 317 static void qeth_l2_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
 318 {
 319         struct qeth_card *card = dev->ml_priv;
 320         struct qeth_vlan_vid *id;
 321
 322         QETH_DBF_TEXT_(TRACE, 4, "aid:%d", vid);
 323         id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
 324         if (id) {
 325                 id->vid = vid;
 326                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
 327                 spin_lock_bh(&card->vlanlock);
 328                 list_add_tail(&id->list, &card->vid_list);
 329                 spin_unlock_bh(&card->vlanlock);
 330         }
 331 }
 332
 333 static void qeth_l2_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
 334 {
 335         struct qeth_vlan_vid *id, *tmpid = NULL;
 336         struct qeth_card *card = dev->ml_priv;
 337
 338         QETH_DBF_TEXT_(TRACE, 4, "kid:%d", vid);
 339         spin_lock_bh(&card->vlanlock);
 340         list_for_each_entry(id, &card->vid_list, list) {
 341                 if (id->vid == vid) {
 342                         list_del(&id->list);
 343                         tmpid = id;
 344                         break;
 345                 }
 346         }
 347         spin_unlock_bh(&card->vlanlock);
 348         if (tmpid) {
 349                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 350                 kfree(tmpid);
 351         }
 352         qeth_l2_set_multicast_list(card->dev);
 353 }
 354
 355 static int qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
 356 {
 357         int rc = 0;
 358
 359         QETH_DBF_TEXT(SETUP , 2, "stopcard");
 360         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 361
 362         qeth_set_allowed_threads(card, 0, 1);
 363         if (qeth_wait_for_threads(card, ~QETH_RECOVER_THREAD))
 364                 return -ERESTARTSYS;
 365         if (card->read.state == CH_STATE_UP &&
 366             card->write.state == CH_STATE_UP &&
 367             (card->state == CARD_STATE_UP)) {
 368                 if (recovery_mode &&
 369                     card->info.type != QETH_CARD_TYPE_OSN) {
 370                         qeth_l2_stop(card->dev);
 371                 } else {
 372                         rtnl_lock();
 373                         dev_close(card->dev);
 374                         rtnl_unlock();
 375                 }
 376                 if (!card->use_hard_stop) {
 377                         __u8 *mac = &card->dev->dev_addr[0];
 378                         rc = qeth_l2_send_delmac(card, mac);
 379                         QETH_DBF_TEXT_(SETUP, 2, "Lerr%d", rc);
 380                 }
 381                 card->state = CARD_STATE_SOFTSETUP;
 382         }
 383         if (card->state == CARD_STATE_SOFTSETUP) {
 384                 qeth_l2_process_vlans(card, 1);
 385                 qeth_l2_del_all_mc(card);
 386                 qeth_clear_ipacmd_list(card);
 387                 card->state = CARD_STATE_HARDSETUP;
 388         }
 389         if (card->state == CARD_STATE_HARDSETUP) {
 390                 qeth_qdio_clear_card(card, 0);
 391                 qeth_clear_qdio_buffers(card);
 392                 qeth_clear_working_pool_list(card);
 393                 card->state = CARD_STATE_DOWN;
 394         }
 395         if (card->state == CARD_STATE_DOWN) {
 396                 qeth_clear_cmd_buffers(&card->read);
 397                 qeth_clear_cmd_buffers(&card->write);
 398         }
 399         card->use_hard_stop = 0;
 400         return rc;
 401 }
 402
 403 static void qeth_l2_process_inbound_buffer(struct qeth_card *card,
 404                             struct qeth_qdio_buffer *buf, int index)
 405 {
 406         struct qdio_buffer_element *element;
 407         struct sk_buff *skb;
 408         struct qeth_hdr *hdr;
 409         int offset;
 410         unsigned int len;
 411
 412         /* get first element of current buffer */
 413         element = (struct qdio_buffer_element *)&buf->buffer->element[0];
 414         offset = 0;
 415         if (card->options.performance_stats)
 416                 card->perf_stats.bufs_rec++;
 417         while ((skb = qeth_core_get_next_skb(card, buf->buffer, &element,
 418                                        &offset, &hdr))) {
 419                 skb->dev = card->dev;
 420                 /* is device UP ? */
 421                 if (!(card->dev->flags & IFF_UP)) {
 422                         dev_kfree_skb_any(skb);
 423                         continue;
 424                 }
 425
 426                 switch (hdr->hdr.l2.id) {
 427                 case QETH_HEADER_TYPE_LAYER2:
 428                         skb->pkt_type = PACKET_HOST;
 429                         skb->protocol = eth_type_trans(skb, skb->dev);
 430                         if (card->options.checksum_type == NO_CHECKSUMMING)
 431                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 432                         else
 433                                 skb->ip_summed = CHECKSUM_NONE;
 434                         if (skb->protocol == htons(ETH_P_802_2))
 435                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
 436                         len = skb->len;
 437                         netif_rx(skb);
 438                         break;
 439                 case QETH_HEADER_TYPE_OSN:
 440                         skb_push(skb, sizeof(struct qeth_hdr));
 441                         skb_copy_to_linear_data(skb, hdr,
 442                                                 sizeof(struct qeth_hdr));
 443                         len = skb->len;
 444                         card->osn_info.data_cb(skb);
 445                         break;
 446                 default:
 447                         dev_kfree_skb_any(skb);
 448                         QETH_DBF_TEXT(TRACE, 3, "inbunkno");
 449                         QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
 450                         continue;
 451                 }
 452                 card->dev->last_rx = jiffies;
 453                 card->stats.rx_packets++;
 454                 card->stats.rx_bytes += len;
 455         }
 456 }
 457
 458 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
 459                            enum qeth_ipa_cmds ipacmd,
 460                            int (*reply_cb) (struct qeth_card *,
 461                                             struct qeth_reply*,
 462                                             unsigned long))
 463 {
 464         struct qeth_ipa_cmd *cmd;
 465         struct qeth_cmd_buffer *iob;
 466
 467         QETH_DBF_TEXT(TRACE, 2, "L2sdmac");
 468         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 469         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 470         cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
 471         memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
 472         return qeth_send_ipa_cmd(card, iob, reply_cb, NULL);
 473 }
 474
 475 static int qeth_l2_send_setmac_cb(struct qeth_card *card,
 476                            struct qeth_reply *reply,
 477                            unsigned long data)
 478 {
 479         struct qeth_ipa_cmd *cmd;
 480
 481         QETH_DBF_TEXT(TRACE, 2, "L2Smaccb");
 482         cmd = (struct qeth_ipa_cmd *) data;
 483         if (cmd->hdr.return_code) {
 484                 QETH_DBF_TEXT_(TRACE, 2, "L2er%x", cmd->hdr.return_code);
 485                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 486                 cmd->hdr.return_code = -EIO;
 487         } else {
 488                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 489                 memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
 490                        OSA_ADDR_LEN);
 491                 PRINT_INFO("MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x "
 492                            "successfully registered on device %s\n",
 493                            card->dev->dev_addr[0], card->dev->dev_addr[1],
 494                            card->dev->dev_addr[2], card->dev->dev_addr[3],
 495                            card->dev->dev_addr[4], card->dev->dev_addr[5],
 496                            card->dev->name);
 497         }
 498         return 0;
 499 }
 500
 501 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
 502 {
 503         QETH_DBF_TEXT(TRACE, 2, "L2Setmac");
 504         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
 505                                           qeth_l2_send_setmac_cb);
 506 }
 507
 508 static int qeth_l2_send_delmac_cb(struct qeth_card *card,
 509                            struct qeth_reply *reply,
 510                            unsigned long data)
 511 {
 512         struct qeth_ipa_cmd *cmd;
 513
 514         QETH_DBF_TEXT(TRACE, 2, "L2Dmaccb");
 515         cmd = (struct qeth_ipa_cmd *) data;
 516         if (cmd->hdr.return_code) {
 517                 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
 518                 cmd->hdr.return_code = -EIO;
 519                 return 0;
 520         }
 521         card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 522
 523         return 0;
 524 }
 525
 526 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
 527 {
 528         QETH_DBF_TEXT(TRACE, 2, "L2Delmac");
 529         if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
 530                 return 0;
 531         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
 532                                           qeth_l2_send_delmac_cb);
 533 }
 534
 535 static int qeth_l2_request_initial_mac(struct qeth_card *card)
 536 {
 537         int rc = 0;
 538         char vendor_pre[] = {0x02, 0x00, 0x00};
 539
 540         QETH_DBF_TEXT(SETUP, 2, "doL2init");
 541         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
 542
 543         rc = qeth_query_setadapterparms(card);
 544         if (rc) {
 545                 QETH_DBF_MESSAGE(2, "could not query adapter parameters on "
 546                         "device %s: x%x\n", CARD_BUS_ID(card), rc);
 547         }
 548
 549         if (card->info.guestlan) {
 550                 rc = qeth_setadpparms_change_macaddr(card);
 551                 if (rc) {
 552                         QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
 553                                 "device %s: x%x\n", CARD_BUS_ID(card), rc);
 554                         QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 555                         return rc;
 556                 }
 557                 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN);
 558         } else {
 559                 random_ether_addr(card->dev->dev_addr);
 560                 memcpy(card->dev->dev_addr, vendor_pre, 3);
 561         }
 562         return 0;
 563 }
 564
 565 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 566 {
 567         struct sockaddr *addr = p;
 568         struct qeth_card *card = dev->ml_priv;
 569         int rc = 0;
 570
 571         QETH_DBF_TEXT(TRACE, 3, "setmac");
 572
 573         if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
 574                 QETH_DBF_TEXT(TRACE, 3, "setmcINV");
 575                 return -EOPNOTSUPP;
 576         }
 577
 578         if (card->info.type == QETH_CARD_TYPE_OSN) {
 579                 QETH_DBF_TEXT(TRACE, 3, "setmcOSN");
 580                 return -EOPNOTSUPP;
 581         }
 582         QETH_DBF_TEXT_(TRACE, 3, "%s", CARD_BUS_ID(card));
 583         QETH_DBF_HEX(TRACE, 3, addr->sa_data, OSA_ADDR_LEN);
 584         rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
 585         if (!rc)
 586                 rc = qeth_l2_send_setmac(card, addr->sa_data);
 587         return rc;
 588 }
 589
 590 static void qeth_l2_set_multicast_list(struct net_device *dev)
 591 {
 592         struct qeth_card *card = dev->ml_priv;
 593         struct dev_mc_list *dm;
 594
 595         if (card->info.type == QETH_CARD_TYPE_OSN)
 596                 return ;
 597
 598         QETH_DBF_TEXT(TRACE, 3, "setmulti");
 599         qeth_l2_del_all_mc(card);
 600         spin_lock_bh(&card->mclock);
 601         for (dm = dev->mc_list; dm; dm = dm->next)
 602                 qeth_l2_add_mc(card, dm->dmi_addr);
 603         spin_unlock_bh(&card->mclock);
 604         if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
 605                 return;
 606         qeth_setadp_promisc_mode(card);
 607 }
 608
 609 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 610 {
 611         int rc;
 612         struct qeth_hdr *hdr = NULL;
 613         int elements = 0;
 614         struct qeth_card *card = dev->ml_priv;
 615         struct sk_buff *new_skb = skb;
 616         int ipv = qeth_get_ip_version(skb);
 617         int cast_type = qeth_get_cast_type(card, skb);
 618         struct qeth_qdio_out_q *queue = card->qdio.out_qs
 619                 [qeth_get_priority_queue(card, skb, ipv, cast_type)];
 620         int tx_bytes = skb->len;
 621         enum qeth_large_send_types large_send = QETH_LARGE_SEND_NO;
 622         struct qeth_eddp_context *ctx = NULL;
 623         int data_offset = -1;
 624         int elements_needed = 0;
 625         int hd_len = 0;
 626
 627         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
 628                 card->stats.tx_carrier_errors++;
 629                 goto tx_drop;
 630         }
 631
 632         if ((card->info.type == QETH_CARD_TYPE_OSN) &&
 633             (skb->protocol == htons(ETH_P_IPV6)))
 634                 goto tx_drop;
 635
 636         if (card->options.performance_stats) {
 637                 card->perf_stats.outbound_cnt++;
 638                 card->perf_stats.outbound_start_time = qeth_get_micros();
 639         }
 640         netif_stop_queue(dev);
 641
 642         if (skb_is_gso(skb))
 643                 large_send = QETH_LARGE_SEND_EDDP;
 644
 645         if (card->info.type == QETH_CARD_TYPE_OSN)
 646                 hdr = (struct qeth_hdr *)skb->data;
 647         else {
 648                 if ((card->info.type == QETH_CARD_TYPE_IQD) && (!large_send) &&
 649                     (skb_shinfo(skb)->nr_frags == 0)) {
 650                         new_skb = skb;
 651                         data_offset = ETH_HLEN;
 652                         hd_len = ETH_HLEN;
 653                         hdr = kmem_cache_alloc(qeth_core_header_cache,
 654                                                 GFP_ATOMIC);
 655                         if (!hdr)
 656                                 goto tx_drop;
 657                         elements_needed++;
 658                         skb_reset_mac_header(new_skb);
 659                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 660                         hdr->hdr.l2.pkt_length = new_skb->len;
 661                         memcpy(((char *)hdr) + sizeof(struct qeth_hdr),
 662                                 skb_mac_header(new_skb), ETH_HLEN);
 663                 } else {
 664                         /* create a clone with writeable headroom */
 665                         new_skb = skb_realloc_headroom(skb,
 666                                                 sizeof(struct qeth_hdr));
 667                         if (!new_skb)
 668                                 goto tx_drop;
 669                         hdr = (struct qeth_hdr *)skb_push(new_skb,
 670                                                 sizeof(struct qeth_hdr));
 671                         skb_set_mac_header(new_skb, sizeof(struct qeth_hdr));
 672                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 673                 }
 674         }
 675
 676         if (large_send == QETH_LARGE_SEND_EDDP) {
 677                 ctx = qeth_eddp_create_context(card, new_skb, hdr,
 678                                                 skb->sk->sk_protocol);
 679                 if (ctx == NULL) {
 680                         QETH_DBF_MESSAGE(2, "could not create eddp context\n");
 681                         goto tx_drop;
 682                 }
 683         } else {
 684                 elements = qeth_get_elements_no(card, (void *)hdr, new_skb,
 685                                                 elements_needed);
 686                 if (!elements) {
 687                         if (data_offset >= 0)
 688                                 kmem_cache_free(qeth_core_header_cache, hdr);
 689                         goto tx_drop;
 690                 }
 691         }
 692
 693         if ((large_send == QETH_LARGE_SEND_NO) &&
 694             (skb->ip_summed == CHECKSUM_PARTIAL))
 695                 qeth_tx_csum(new_skb);
 696
 697         if (card->info.type != QETH_CARD_TYPE_IQD)
 698                 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
 699                                          elements, ctx);
 700         else
 701                 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
 702                                         elements, ctx, data_offset, hd_len);
 703         if (!rc) {
 704                 card->stats.tx_packets++;
 705                 card->stats.tx_bytes += tx_bytes;
 706                 if (new_skb != skb)
 707                         dev_kfree_skb_any(skb);
 708                 if (card->options.performance_stats) {
 709                         if (large_send != QETH_LARGE_SEND_NO) {
 710                                 card->perf_stats.large_send_bytes += tx_bytes;
 711                                 card->perf_stats.large_send_cnt++;
 712                         }
 713                         if (skb_shinfo(new_skb)->nr_frags > 0) {
 714                                 card->perf_stats.sg_skbs_sent++;
 715                                 /* nr_frags + skb->data */
 716                                 card->perf_stats.sg_frags_sent +=
 717                                         skb_shinfo(new_skb)->nr_frags + 1;
 718                         }
 719                 }
 720
 721                 if (ctx != NULL) {
 722                         qeth_eddp_put_context(ctx);
 723                         dev_kfree_skb_any(new_skb);
 724                 }
 725         } else {
 726                 if (ctx != NULL)
 727                         qeth_eddp_put_context(ctx);
 728
 729                 if (data_offset >= 0)
 730                         kmem_cache_free(qeth_core_header_cache, hdr);
 731
 732                 if (rc == -EBUSY) {
 733                         if (new_skb != skb)
 734                                 dev_kfree_skb_any(new_skb);
 735                         return NETDEV_TX_BUSY;
 736                 } else
 737                         goto tx_drop;
 738         }
 739
 740         netif_wake_queue(dev);
 741         if (card->options.performance_stats)
 742                 card->perf_stats.outbound_time += qeth_get_micros() -
 743                         card->perf_stats.outbound_start_time;
 744         return rc;
 745
 746 tx_drop:
 747         card->stats.tx_dropped++;
 748         card->stats.tx_errors++;
 749         if ((new_skb != skb) && new_skb)
 750                 dev_kfree_skb_any(new_skb);
 751         dev_kfree_skb_any(skb);
 752         netif_wake_queue(dev);
 753         return NETDEV_TX_OK;
 754 }
 755
 756 static void qeth_l2_qdio_input_handler(struct ccw_device *ccwdev,
 757                         unsigned int qdio_err, unsigned int queue,
 758                         int first_element, int count, unsigned long card_ptr)
 759 {
 760         struct net_device *net_dev;
 761         struct qeth_card *card;
 762         struct qeth_qdio_buffer *buffer;
 763         int index;
 764         int i;
 765
 766         card = (struct qeth_card *) card_ptr;
 767         net_dev = card->dev;
 768         if (card->options.performance_stats) {
 769                 card->perf_stats.inbound_cnt++;
 770                 card->perf_stats.inbound_start_time = qeth_get_micros();
 771         }
 772         if (qdio_err & QDIO_ERROR_ACTIVATE_CHECK_CONDITION) {
 773                 QETH_DBF_TEXT(TRACE, 1, "qdinchk");
 774                 QETH_DBF_TEXT_(TRACE, 1, "%s", CARD_BUS_ID(card));
 775                 QETH_DBF_TEXT_(TRACE, 1, "%04X%04X", first_element,
 776                                 count);
 777                 QETH_DBF_TEXT_(TRACE, 1, "%04X", queue);
 778                 qeth_schedule_recovery(card);
 779                 return;
 780         }
 781         for (i = first_element; i < (first_element + count); ++i) {
 782                 index = i % QDIO_MAX_BUFFERS_PER_Q;
 783                 buffer = &card->qdio.in_q->bufs[index];
 784                 if (!(qdio_err &&
 785                       qeth_check_qdio_errors(buffer->buffer, qdio_err, "qinerr")))
 786                         qeth_l2_process_inbound_buffer(card, buffer, index);
 787                 /* clear buffer and give back to hardware */
 788                 qeth_put_buffer_pool_entry(card, buffer->pool_entry);
 789                 qeth_queue_input_buffer(card, index);
 790         }
 791         if (card->options.performance_stats)
 792                 card->perf_stats.inbound_time += qeth_get_micros() -
 793                         card->perf_stats.inbound_start_time;
 794 }
 795
 796 static int qeth_l2_open(struct net_device *dev)
 797 {
 798         struct qeth_card *card = dev->ml_priv;
 799
 800         QETH_DBF_TEXT(TRACE, 4, "qethopen");
 801         if (card->state != CARD_STATE_SOFTSETUP)
 802                 return -ENODEV;
 803
 804         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
 805              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
 806                 QETH_DBF_TEXT(TRACE, 4, "nomacadr");
 807                 return -EPERM;
 808         }
 809         card->data.state = CH_STATE_UP;
 810         card->state = CARD_STATE_UP;
 811         card->dev->flags |= IFF_UP;
 812         netif_start_queue(dev);
 813
 814         if (!card->lan_online && netif_carrier_ok(dev))
 815                 netif_carrier_off(dev);
 816         return 0;
 817 }
 818
 819
 820 static int qeth_l2_stop(struct net_device *dev)
 821 {
 822         struct qeth_card *card = dev->ml_priv;
 823
 824         QETH_DBF_TEXT(TRACE, 4, "qethstop");
 825         netif_tx_disable(dev);
 826         card->dev->flags &= ~IFF_UP;
 827         if (card->state == CARD_STATE_UP)
 828                 card->state = CARD_STATE_SOFTSETUP;
 829         return 0;
 830 }
 831
 832 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 833 {
 834         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 835
 836         INIT_LIST_HEAD(&card->vid_list);
 837         INIT_LIST_HEAD(&card->mc_list);
 838         card->options.layer2 = 1;
 839         card->discipline.input_handler = (qdio_handler_t *)
 840                 qeth_l2_qdio_input_handler;
 841         card->discipline.output_handler = (qdio_handler_t *)
 842                 qeth_qdio_output_handler;
 843         card->discipline.recover = qeth_l2_recover;
 844         return 0;
 845 }
 846
 847 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
 848 {
 849         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
 850
 851         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 852
 853         if (cgdev->state == CCWGROUP_ONLINE) {
 854                 card->use_hard_stop = 1;
 855                 qeth_l2_set_offline(cgdev);
 856         }
 857
 858         if (card->dev) {
 859                 unregister_netdev(card->dev);
 860                 card->dev = NULL;
 861         }
 862
 863         qeth_l2_del_all_mc(card);
 864         return;
 865 }
 866
 867 static int qeth_l2_ethtool_set_tso(struct net_device *dev, u32 data)
 868 {
 869         struct qeth_card *card = dev->ml_priv;
 870
 871         if (data) {
 872                 if (card->options.large_send == QETH_LARGE_SEND_NO) {
 873                         card->options.large_send = QETH_LARGE_SEND_EDDP;
 874                         dev->features |= NETIF_F_TSO;
 875                 }
 876         } else {
 877                 dev->features &= ~NETIF_F_TSO;
 878                 card->options.large_send = QETH_LARGE_SEND_NO;
 879         }
 880         return 0;
 881 }
 882
 883 static struct ethtool_ops qeth_l2_ethtool_ops = {
 884         .get_link = ethtool_op_get_link,
 885         .get_tx_csum = ethtool_op_get_tx_csum,
 886         .set_tx_csum = ethtool_op_set_tx_hw_csum,
 887         .get_sg = ethtool_op_get_sg,
 888         .set_sg = ethtool_op_set_sg,
 889         .get_tso = ethtool_op_get_tso,
 890         .set_tso = qeth_l2_ethtool_set_tso,
 891         .get_strings = qeth_core_get_strings,
 892         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 893         .get_stats_count = qeth_core_get_stats_count,
 894         .get_drvinfo = qeth_core_get_drvinfo,
 895         .get_settings = qeth_core_ethtool_get_settings,
 896 };
 897
 898 static struct ethtool_ops qeth_l2_osn_ops = {
 899         .get_strings = qeth_core_get_strings,
 900         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 901         .get_stats_count = qeth_core_get_stats_count,
 902         .get_drvinfo = qeth_core_get_drvinfo,
 903 };
 904
 905 static int qeth_l2_setup_netdev(struct qeth_card *card)
 906 {
 907         switch (card->info.type) {
 908         case QETH_CARD_TYPE_OSAE:
 909                 card->dev = alloc_etherdev(0);
 910                 break;
 911         case QETH_CARD_TYPE_IQD:
 912                 card->dev = alloc_netdev(0, "hsi%d", ether_setup);
 913                 break;
 914         case QETH_CARD_TYPE_OSN:
 915                 card->dev = alloc_netdev(0, "osn%d", ether_setup);
 916                 card->dev->flags |= IFF_NOARP;
 917                 break;
 918         default:
 919                 card->dev = alloc_etherdev(0);
 920         }
 921
 922         if (!card->dev)
 923                 return -ENODEV;
 924
 925         card->dev->ml_priv = card;
 926         card->dev->tx_timeout = &qeth_tx_timeout;
 927         card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
 928         card->dev->open = qeth_l2_open;
 929         card->dev->stop = qeth_l2_stop;
 930         card->dev->hard_start_xmit = qeth_l2_hard_start_xmit;
 931         card->dev->do_ioctl = qeth_l2_do_ioctl;
 932         card->dev->get_stats = qeth_get_stats;
 933         card->dev->change_mtu = qeth_change_mtu;
 934         card->dev->set_multicast_list = qeth_l2_set_multicast_list;
 935         card->dev->vlan_rx_kill_vid = qeth_l2_vlan_rx_kill_vid;
 936         card->dev->vlan_rx_add_vid = qeth_l2_vlan_rx_add_vid;
 937         card->dev->set_mac_address = qeth_l2_set_mac_address;
 938         card->dev->mtu = card->info.initial_mtu;
 939         if (card->info.type != QETH_CARD_TYPE_OSN)
 940                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops);
 941         else
 942                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops);
 943         card->dev->features |= NETIF_F_HW_VLAN_FILTER;
 944         card->info.broadcast_capable = 1;
 945         qeth_l2_request_initial_mac(card);
 946         SET_NETDEV_DEV(card->dev, &card->gdev->dev);
 947         return register_netdev(card->dev);
 948 }
 949
 950 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 951 {
 952         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 953         int rc = 0;
 954         enum qeth_card_states recover_flag;
 955
 956         BUG_ON(!card);
 957         QETH_DBF_TEXT(SETUP, 2, "setonlin");
 958         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 959
 960         qeth_set_allowed_threads(card, QETH_RECOVER_THREAD, 1);
 961         if (qeth_wait_for_threads(card, ~QETH_RECOVER_THREAD)) {
 962                 PRINT_WARN("set_online of card %s interrupted by user!\n",
 963                            CARD_BUS_ID(card));
 964                 return -ERESTARTSYS;
 965         }
 966
 967         recover_flag = card->state;
 968         rc = ccw_device_set_online(CARD_RDEV(card));
 969         if (rc) {
 970                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 971                 return -EIO;
 972         }
 973         rc = ccw_device_set_online(CARD_WDEV(card));
 974         if (rc) {
 975                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 976                 return -EIO;
 977         }
 978         rc = ccw_device_set_online(CARD_DDEV(card));
 979         if (rc) {
 980                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 981                 return -EIO;
 982         }
 983
 984         rc = qeth_core_hardsetup_card(card);
 985         if (rc) {
 986                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
 987                 goto out_remove;
 988         }
 989
 990         if (!card->dev && qeth_l2_setup_netdev(card))
 991                 goto out_remove;
 992
 993         if (card->info.type != QETH_CARD_TYPE_OSN)
 994                 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
 995
 996         card->state = CARD_STATE_HARDSETUP;
 997         qeth_print_status_message(card);
 998
 999         /* softsetup */
1000         QETH_DBF_TEXT(SETUP, 2, "softsetp");
1001
1002         rc = qeth_send_startlan(card);
1003         if (rc) {
1004                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1005                 if (rc == 0xe080) {
1006                         PRINT_WARN("LAN on card %s if offline! "
1007                                    "Waiting for STARTLAN from card.\n",
1008                                    CARD_BUS_ID(card));
1009                         card->lan_online = 0;
1010                 }
1011                 return rc;
1012         } else
1013                 card->lan_online = 1;
1014
1015         if (card->info.type != QETH_CARD_TYPE_OSN) {
1016                 qeth_set_large_send(card, card->options.large_send);
1017                 qeth_l2_process_vlans(card, 0);
1018         }
1019
1020         netif_tx_disable(card->dev);
1021
1022         rc = qeth_init_qdio_queues(card);
1023         if (rc) {
1024                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1025                 goto out_remove;
1026         }
1027         card->state = CARD_STATE_SOFTSETUP;
1028         netif_carrier_on(card->dev);
1029
1030         qeth_set_allowed_threads(card, 0xffffffff, 0);
1031         if (recover_flag == CARD_STATE_RECOVER) {
1032                 if (recovery_mode &&
1033                     card->info.type != QETH_CARD_TYPE_OSN) {
1034                         qeth_l2_open(card->dev);
1035                 } else {
1036                         rtnl_lock();
1037                         dev_open(card->dev);
1038                         rtnl_unlock();
1039                 }
1040                 /* this also sets saved unicast addresses */
1041                 qeth_l2_set_multicast_list(card->dev);
1042         }
1043         /* let user_space know that device is online */
1044         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1045         return 0;
1046 out_remove:
1047         card->use_hard_stop = 1;
1048         qeth_l2_stop_card(card, 0);
1049         ccw_device_set_offline(CARD_DDEV(card));
1050         ccw_device_set_offline(CARD_WDEV(card));
1051         ccw_device_set_offline(CARD_RDEV(card));
1052         if (recover_flag == CARD_STATE_RECOVER)
1053                 card->state = CARD_STATE_RECOVER;
1054         else
1055                 card->state = CARD_STATE_DOWN;
1056         return -ENODEV;
1057 }
1058
1059 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1060 {
1061         return __qeth_l2_set_online(gdev, 0);
1062 }
1063
1064 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1065                                         int recovery_mode)
1066 {
1067         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1068         int rc = 0, rc2 = 0, rc3 = 0;
1069         enum qeth_card_states recover_flag;
1070
1071         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1072         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1073
1074         if (card->dev && netif_carrier_ok(card->dev))
1075                 netif_carrier_off(card->dev);
1076         recover_flag = card->state;
1077         if (qeth_l2_stop_card(card, recovery_mode) == -ERESTARTSYS) {
1078                 PRINT_WARN("Stopping card %s interrupted by user!\n",
1079                            CARD_BUS_ID(card));
1080                 return -ERESTARTSYS;
1081         }
1082         rc  = ccw_device_set_offline(CARD_DDEV(card));
1083         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1084         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1085         if (!rc)
1086                 rc = (rc2) ? rc2 : rc3;
1087         if (rc)
1088                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1089         if (recover_flag == CARD_STATE_UP)
1090                 card->state = CARD_STATE_RECOVER;
1091         /* let user_space know that device is offline */
1092         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1093         return 0;
1094 }
1095
1096 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1097 {
1098         return __qeth_l2_set_offline(cgdev, 0);
1099 }
1100
1101 static int qeth_l2_recover(void *ptr)
1102 {
1103         struct qeth_card *card;
1104         int rc = 0;
1105
1106         card = (struct qeth_card *) ptr;
1107         QETH_DBF_TEXT(TRACE, 2, "recover1");
1108         QETH_DBF_HEX(TRACE, 2, &card, sizeof(void *));
1109         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1110                 return 0;
1111         QETH_DBF_TEXT(TRACE, 2, "recover2");
1112         PRINT_WARN("Recovery of device %s started ...\n",
1113                    CARD_BUS_ID(card));
1114         card->use_hard_stop = 1;
1115         __qeth_l2_set_offline(card->gdev, 1);
1116         rc = __qeth_l2_set_online(card->gdev, 1);
1117         /* don't run another scheduled recovery */
1118         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1119         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1120         if (!rc)
1121                 PRINT_INFO("Device %s successfully recovered!\n",
1122                            CARD_BUS_ID(card));
1123         else
1124                 PRINT_INFO("Device %s could not be recovered!\n",
1125                            CARD_BUS_ID(card));
1126         return 0;
1127 }
1128
1129 static int __init qeth_l2_init(void)
1130 {
1131         PRINT_INFO("register layer 2 discipline\n");
1132         return 0;
1133 }
1134
1135 static void __exit qeth_l2_exit(void)
1136 {
1137         PRINT_INFO("unregister layer 2 discipline\n");
1138 }
1139
1140 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1141 {
1142         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1143         qeth_qdio_clear_card(card, 0);
1144         qeth_clear_qdio_buffers(card);
1145 }
1146
1147 struct ccwgroup_driver qeth_l2_ccwgroup_driver = {
1148         .probe = qeth_l2_probe_device,
1149         .remove = qeth_l2_remove_device,
1150         .set_online = qeth_l2_set_online,
1151         .set_offline = qeth_l2_set_offline,
1152         .shutdown = qeth_l2_shutdown,
1153 };
1154 EXPORT_SYMBOL_GPL(qeth_l2_ccwgroup_driver);
1155
1156 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1157                            struct qeth_cmd_buffer *iob)
1158 {
1159         unsigned long flags;
1160         int rc = 0;
1161
1162         QETH_DBF_TEXT(TRACE, 5, "osndctrd");
1163
1164         wait_event(card->wait_q,
1165                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1166         qeth_prepare_control_data(card, len, iob);
1167         QETH_DBF_TEXT(TRACE, 6, "osnoirqp");
1168         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1169         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1170                               (addr_t) iob, 0, 0);
1171         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1172         if (rc) {
1173                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1174                            "ccw_device_start rc = %i\n", rc);
1175                 QETH_DBF_TEXT_(TRACE, 2, " err%d", rc);
1176                 qeth_release_buffer(iob->channel, iob);
1177                 atomic_set(&card->write.irq_pending, 0);
1178                 wake_up(&card->wait_q);
1179         }
1180         return rc;
1181 }
1182
1183 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1184                         struct qeth_cmd_buffer *iob, int data_len)
1185 {
1186         u16 s1, s2;
1187
1188         QETH_DBF_TEXT(TRACE, 4, "osndipa");
1189
1190         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1191         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1192         s2 = (u16)data_len;
1193         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1194         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1195         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1196         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1197         return qeth_osn_send_control_data(card, s1, iob);
1198 }
1199
1200 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1201 {
1202         struct qeth_cmd_buffer *iob;
1203         struct qeth_card *card;
1204         int rc;
1205
1206         QETH_DBF_TEXT(TRACE, 2, "osnsdmc");
1207         if (!dev)
1208                 return -ENODEV;
1209         card = dev->ml_priv;
1210         if (!card)
1211                 return -ENODEV;
1212         if ((card->state != CARD_STATE_UP) &&
1213             (card->state != CARD_STATE_SOFTSETUP))
1214                 return -ENODEV;
1215         iob = qeth_wait_for_buffer(&card->write);
1216         memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1217         rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1218         return rc;
1219 }
1220 EXPORT_SYMBOL(qeth_osn_assist);
1221
1222 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1223                   int (*assist_cb)(struct net_device *, void *),
1224                   int (*data_cb)(struct sk_buff *))
1225 {
1226         struct qeth_card *card;
1227
1228         QETH_DBF_TEXT(TRACE, 2, "osnreg");
1229         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1230         if (*dev == NULL)
1231                 return -ENODEV;
1232         card = (*dev)->ml_priv;
1233         if (!card)
1234                 return -ENODEV;
1235         if ((assist_cb == NULL) || (data_cb == NULL))
1236                 return -EINVAL;
1237         card->osn_info.assist_cb = assist_cb;
1238         card->osn_info.data_cb = data_cb;
1239         return 0;
1240 }
1241 EXPORT_SYMBOL(qeth_osn_register);
1242
1243 void qeth_osn_deregister(struct net_device *dev)
1244 {
1245         struct qeth_card *card;
1246
1247         QETH_DBF_TEXT(TRACE, 2, "osndereg");
1248         if (!dev)
1249                 return;
1250         card = dev->ml_priv;
1251         if (!card)
1252                 return;
1253         card->osn_info.assist_cb = NULL;
1254         card->osn_info.data_cb = NULL;
1255         return;
1256 }
1257 EXPORT_SYMBOL(qeth_osn_deregister);
1258
1259 module_init(qeth_l2_init);
1260 module_exit(qeth_l2_exit);
1261 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1262 MODULE_DESCRIPTION("qeth layer 2 discipline");
1263 MODULE_LICENSE("GPL");