git.oblomov.eu Git - linux-2.6/blob - 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 #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 %pM already existing on %s \n",
 135                           mac, QETH_CARD_IFNAME(card));
 136                 cmd->hdr.return_code = 0;
 137         }
 138         if (cmd->hdr.return_code)
 139                 QETH_DBF_MESSAGE(2, "Could not set group MAC %pM on %s: %x\n",
 140                           mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 141         return 0;
 142 }
 143
 144 static int qeth_l2_send_setgroupmac(struct qeth_card *card, __u8 *mac)
 145 {
 146         QETH_DBF_TEXT(TRACE, 2, "L2Sgmac");
 147         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETGMAC,
 148                                           qeth_l2_send_setgroupmac_cb);
 149 }
 150
 151 static int qeth_l2_send_delgroupmac_cb(struct qeth_card *card,
 152                                 struct qeth_reply *reply,
 153                                 unsigned long data)
 154 {
 155         struct qeth_ipa_cmd *cmd;
 156         __u8 *mac;
 157
 158         QETH_DBF_TEXT(TRACE, 2, "L2Dgmacb");
 159         cmd = (struct qeth_ipa_cmd *) data;
 160         mac = &cmd->data.setdelmac.mac[0];
 161         if (cmd->hdr.return_code)
 162                 QETH_DBF_MESSAGE(2, "Could not delete group MAC %pM on %s: %x\n",
 163                           mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 164         return 0;
 165 }
 166
 167 static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac)
 168 {
 169         QETH_DBF_TEXT(TRACE, 2, "L2Dgmac");
 170         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELGMAC,
 171                                           qeth_l2_send_delgroupmac_cb);
 172 }
 173
 174 static void qeth_l2_add_mc(struct qeth_card *card, __u8 *mac, int vmac)
 175 {
 176         struct qeth_mc_mac *mc;
 177         int rc;
 178
 179         mc = kmalloc(sizeof(struct qeth_mc_mac), GFP_ATOMIC);
 180
 181         if (!mc)
 182                 return;
 183
 184         memcpy(mc->mc_addr, mac, OSA_ADDR_LEN);
 185         mc->mc_addrlen = OSA_ADDR_LEN;
 186         mc->is_vmac = vmac;
 187
 188         if (vmac) {
 189                 rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
 190                                         NULL);
 191         } else {
 192                 rc = qeth_l2_send_setgroupmac(card, mac);
 193         }
 194
 195         if (!rc)
 196                 list_add_tail(&mc->list, &card->mc_list);
 197         else
 198                 kfree(mc);
 199 }
 200
 201 static void qeth_l2_del_all_mc(struct qeth_card *card)
 202 {
 203         struct qeth_mc_mac *mc, *tmp;
 204
 205         spin_lock_bh(&card->mclock);
 206         list_for_each_entry_safe(mc, tmp, &card->mc_list, list) {
 207                 if (mc->is_vmac)
 208                         qeth_l2_send_setdelmac(card, mc->mc_addr,
 209                                         IPA_CMD_DELVMAC, NULL);
 210                 else
 211                         qeth_l2_send_delgroupmac(card, mc->mc_addr);
 212                 list_del(&mc->list);
 213                 kfree(mc);
 214         }
 215         spin_unlock_bh(&card->mclock);
 216 }
 217
 218 static void qeth_l2_get_packet_type(struct qeth_card *card,
 219                         struct qeth_hdr *hdr, struct sk_buff *skb)
 220 {
 221         __u16 hdr_mac;
 222
 223         if (!memcmp(skb->data + QETH_HEADER_SIZE,
 224                     skb->dev->broadcast, 6)) {
 225                 /* broadcast? */
 226                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 227                 return;
 228         }
 229         hdr_mac = *((__u16 *)skb->data);
 230         /* tr multicast? */
 231         switch (card->info.link_type) {
 232         case QETH_LINK_TYPE_HSTR:
 233         case QETH_LINK_TYPE_LANE_TR:
 234                 if ((hdr_mac == QETH_TR_MAC_NC) ||
 235                     (hdr_mac == QETH_TR_MAC_C))
 236                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 237                 else
 238                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 239                 break;
 240                 /* eth or so multicast? */
 241         default:
 242                 if ((hdr_mac == QETH_ETH_MAC_V4) ||
 243                      (hdr_mac == QETH_ETH_MAC_V6))
 244                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 245                 else
 246                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 247         }
 248 }
 249
 250 static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
 251                         struct sk_buff *skb, int ipv, int cast_type)
 252 {
 253         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
 254
 255         memset(hdr, 0, sizeof(struct qeth_hdr));
 256         hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
 257
 258         /* set byte byte 3 to casting flags */
 259         if (cast_type == RTN_MULTICAST)
 260                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 261         else if (cast_type == RTN_BROADCAST)
 262                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 263         else
 264                 qeth_l2_get_packet_type(card, hdr, skb);
 265
 266         hdr->hdr.l2.pkt_length = skb->len-QETH_HEADER_SIZE;
 267         /* VSWITCH relies on the VLAN
 268          * information to be present in
 269          * the QDIO header */
 270         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
 271                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
 272                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
 273         }
 274 }
 275
 276 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
 277                         struct qeth_reply *reply, unsigned long data)
 278 {
 279         struct qeth_ipa_cmd *cmd;
 280
 281         QETH_DBF_TEXT(TRACE, 2, "L2sdvcb");
 282         cmd = (struct qeth_ipa_cmd *) data;
 283         if (cmd->hdr.return_code) {
 284                 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x. "
 285                           "Continuing\n", cmd->data.setdelvlan.vlan_id,
 286                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 287                 QETH_DBF_TEXT_(TRACE, 2, "L2VL%4x", cmd->hdr.command);
 288                 QETH_DBF_TEXT_(TRACE, 2, "L2%s", CARD_BUS_ID(card));
 289                 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
 290         }
 291         return 0;
 292 }
 293
 294 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
 295                                 enum qeth_ipa_cmds ipacmd)
 296 {
 297         struct qeth_ipa_cmd *cmd;
 298         struct qeth_cmd_buffer *iob;
 299
 300         QETH_DBF_TEXT_(TRACE, 4, "L2sdv%x", ipacmd);
 301         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 302         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 303         cmd->data.setdelvlan.vlan_id = i;
 304         return qeth_send_ipa_cmd(card, iob,
 305                                  qeth_l2_send_setdelvlan_cb, NULL);
 306 }
 307
 308 static void qeth_l2_process_vlans(struct qeth_card *card, int clear)
 309 {
 310         struct qeth_vlan_vid *id;
 311         QETH_DBF_TEXT(TRACE, 3, "L2prcvln");
 312         spin_lock_bh(&card->vlanlock);
 313         list_for_each_entry(id, &card->vid_list, list) {
 314                 if (clear)
 315                         qeth_l2_send_setdelvlan(card, id->vid,
 316                                 IPA_CMD_DELVLAN);
 317                 else
 318                         qeth_l2_send_setdelvlan(card, id->vid,
 319                                 IPA_CMD_SETVLAN);
 320         }
 321         spin_unlock_bh(&card->vlanlock);
 322 }
 323
 324 static void qeth_l2_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
 325 {
 326         struct qeth_card *card = dev->ml_priv;
 327         struct qeth_vlan_vid *id;
 328
 329         QETH_DBF_TEXT_(TRACE, 4, "aid:%d", vid);
 330         id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
 331         if (id) {
 332                 id->vid = vid;
 333                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
 334                 spin_lock_bh(&card->vlanlock);
 335                 list_add_tail(&id->list, &card->vid_list);
 336                 spin_unlock_bh(&card->vlanlock);
 337         }
 338 }
 339
 340 static void qeth_l2_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
 341 {
 342         struct qeth_vlan_vid *id, *tmpid = NULL;
 343         struct qeth_card *card = dev->ml_priv;
 344
 345         QETH_DBF_TEXT_(TRACE, 4, "kid:%d", vid);
 346         spin_lock_bh(&card->vlanlock);
 347         list_for_each_entry(id, &card->vid_list, list) {
 348                 if (id->vid == vid) {
 349                         list_del(&id->list);
 350                         tmpid = id;
 351                         break;
 352                 }
 353         }
 354         spin_unlock_bh(&card->vlanlock);
 355         if (tmpid) {
 356                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 357                 kfree(tmpid);
 358         }
 359         qeth_l2_set_multicast_list(card->dev);
 360 }
 361
 362 static int qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
 363 {
 364         int rc = 0;
 365
 366         QETH_DBF_TEXT(SETUP , 2, "stopcard");
 367         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 368
 369         qeth_set_allowed_threads(card, 0, 1);
 370         if (qeth_wait_for_threads(card, ~QETH_RECOVER_THREAD))
 371                 return -ERESTARTSYS;
 372         if (card->read.state == CH_STATE_UP &&
 373             card->write.state == CH_STATE_UP &&
 374             (card->state == CARD_STATE_UP)) {
 375                 if (recovery_mode &&
 376                     card->info.type != QETH_CARD_TYPE_OSN) {
 377                         qeth_l2_stop(card->dev);
 378                 } else {
 379                         rtnl_lock();
 380                         dev_close(card->dev);
 381                         rtnl_unlock();
 382                 }
 383                 if (!card->use_hard_stop) {
 384                         __u8 *mac = &card->dev->dev_addr[0];
 385                         rc = qeth_l2_send_delmac(card, mac);
 386                         QETH_DBF_TEXT_(SETUP, 2, "Lerr%d", rc);
 387                 }
 388                 card->state = CARD_STATE_SOFTSETUP;
 389         }
 390         if (card->state == CARD_STATE_SOFTSETUP) {
 391                 qeth_l2_process_vlans(card, 1);
 392                 if (!card->use_hard_stop)
 393                         qeth_l2_del_all_mc(card);
 394                 qeth_clear_ipacmd_list(card);
 395                 card->state = CARD_STATE_HARDSETUP;
 396         }
 397         if (card->state == CARD_STATE_HARDSETUP) {
 398                 qeth_qdio_clear_card(card, 0);
 399                 qeth_clear_qdio_buffers(card);
 400                 qeth_clear_working_pool_list(card);
 401                 card->state = CARD_STATE_DOWN;
 402         }
 403         if (card->state == CARD_STATE_DOWN) {
 404                 qeth_clear_cmd_buffers(&card->read);
 405                 qeth_clear_cmd_buffers(&card->write);
 406         }
 407         card->use_hard_stop = 0;
 408         return rc;
 409 }
 410
 411 static void qeth_l2_process_inbound_buffer(struct qeth_card *card,
 412                             struct qeth_qdio_buffer *buf, int index)
 413 {
 414         struct qdio_buffer_element *element;
 415         struct sk_buff *skb;
 416         struct qeth_hdr *hdr;
 417         int offset;
 418         unsigned int len;
 419
 420         /* get first element of current buffer */
 421         element = (struct qdio_buffer_element *)&buf->buffer->element[0];
 422         offset = 0;
 423         if (card->options.performance_stats)
 424                 card->perf_stats.bufs_rec++;
 425         while ((skb = qeth_core_get_next_skb(card, buf->buffer, &element,
 426                                        &offset, &hdr))) {
 427                 skb->dev = card->dev;
 428                 /* is device UP ? */
 429                 if (!(card->dev->flags & IFF_UP)) {
 430                         dev_kfree_skb_any(skb);
 431                         continue;
 432                 }
 433
 434                 switch (hdr->hdr.l2.id) {
 435                 case QETH_HEADER_TYPE_LAYER2:
 436                         skb->pkt_type = PACKET_HOST;
 437                         skb->protocol = eth_type_trans(skb, skb->dev);
 438                         if (card->options.checksum_type == NO_CHECKSUMMING)
 439                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 440                         else
 441                                 skb->ip_summed = CHECKSUM_NONE;
 442                         if (skb->protocol == htons(ETH_P_802_2))
 443                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
 444                         len = skb->len;
 445                         netif_rx(skb);
 446                         break;
 447                 case QETH_HEADER_TYPE_OSN:
 448                         skb_push(skb, sizeof(struct qeth_hdr));
 449                         skb_copy_to_linear_data(skb, hdr,
 450                                                 sizeof(struct qeth_hdr));
 451                         len = skb->len;
 452                         card->osn_info.data_cb(skb);
 453                         break;
 454                 default:
 455                         dev_kfree_skb_any(skb);
 456                         QETH_DBF_TEXT(TRACE, 3, "inbunkno");
 457                         QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
 458                         continue;
 459                 }
 460                 card->dev->last_rx = jiffies;
 461                 card->stats.rx_packets++;
 462                 card->stats.rx_bytes += len;
 463         }
 464 }
 465
 466 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
 467                            enum qeth_ipa_cmds ipacmd,
 468                            int (*reply_cb) (struct qeth_card *,
 469                                             struct qeth_reply*,
 470                                             unsigned long))
 471 {
 472         struct qeth_ipa_cmd *cmd;
 473         struct qeth_cmd_buffer *iob;
 474
 475         QETH_DBF_TEXT(TRACE, 2, "L2sdmac");
 476         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 477         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 478         cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
 479         memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
 480         return qeth_send_ipa_cmd(card, iob, reply_cb, NULL);
 481 }
 482
 483 static int qeth_l2_send_setmac_cb(struct qeth_card *card,
 484                            struct qeth_reply *reply,
 485                            unsigned long data)
 486 {
 487         struct qeth_ipa_cmd *cmd;
 488
 489         QETH_DBF_TEXT(TRACE, 2, "L2Smaccb");
 490         cmd = (struct qeth_ipa_cmd *) data;
 491         if (cmd->hdr.return_code) {
 492                 QETH_DBF_TEXT_(TRACE, 2, "L2er%x", cmd->hdr.return_code);
 493                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 494                 cmd->hdr.return_code = -EIO;
 495         } else {
 496                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 497                 memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
 498                        OSA_ADDR_LEN);
 499                 PRINT_INFO("MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x "
 500                            "successfully registered on device %s\n",
 501                            card->dev->dev_addr[0], card->dev->dev_addr[1],
 502                            card->dev->dev_addr[2], card->dev->dev_addr[3],
 503                            card->dev->dev_addr[4], card->dev->dev_addr[5],
 504                            card->dev->name);
 505         }
 506         return 0;
 507 }
 508
 509 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
 510 {
 511         QETH_DBF_TEXT(TRACE, 2, "L2Setmac");
 512         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
 513                                           qeth_l2_send_setmac_cb);
 514 }
 515
 516 static int qeth_l2_send_delmac_cb(struct qeth_card *card,
 517                            struct qeth_reply *reply,
 518                            unsigned long data)
 519 {
 520         struct qeth_ipa_cmd *cmd;
 521
 522         QETH_DBF_TEXT(TRACE, 2, "L2Dmaccb");
 523         cmd = (struct qeth_ipa_cmd *) data;
 524         if (cmd->hdr.return_code) {
 525                 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
 526                 cmd->hdr.return_code = -EIO;
 527                 return 0;
 528         }
 529         card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 530
 531         return 0;
 532 }
 533
 534 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
 535 {
 536         QETH_DBF_TEXT(TRACE, 2, "L2Delmac");
 537         if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
 538                 return 0;
 539         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
 540                                           qeth_l2_send_delmac_cb);
 541 }
 542
 543 static int qeth_l2_request_initial_mac(struct qeth_card *card)
 544 {
 545         int rc = 0;
 546         char vendor_pre[] = {0x02, 0x00, 0x00};
 547
 548         QETH_DBF_TEXT(SETUP, 2, "doL2init");
 549         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
 550
 551         rc = qeth_query_setadapterparms(card);
 552         if (rc) {
 553                 QETH_DBF_MESSAGE(2, "could not query adapter parameters on "
 554                         "device %s: x%x\n", CARD_BUS_ID(card), rc);
 555         }
 556
 557         if ((card->info.type == QETH_CARD_TYPE_IQD) ||
 558             (card->info.guestlan)) {
 559                 rc = qeth_setadpparms_change_macaddr(card);
 560                 if (rc) {
 561                         QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
 562                                 "device %s: x%x\n", CARD_BUS_ID(card), rc);
 563                         QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 564                         return rc;
 565                 }
 566                 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN);
 567         } else {
 568                 random_ether_addr(card->dev->dev_addr);
 569                 memcpy(card->dev->dev_addr, vendor_pre, 3);
 570         }
 571         return 0;
 572 }
 573
 574 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 575 {
 576         struct sockaddr *addr = p;
 577         struct qeth_card *card = dev->ml_priv;
 578         int rc = 0;
 579
 580         QETH_DBF_TEXT(TRACE, 3, "setmac");
 581
 582         if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
 583                 QETH_DBF_TEXT(TRACE, 3, "setmcINV");
 584                 return -EOPNOTSUPP;
 585         }
 586
 587         if (card->info.type == QETH_CARD_TYPE_OSN) {
 588                 QETH_DBF_TEXT(TRACE, 3, "setmcOSN");
 589                 return -EOPNOTSUPP;
 590         }
 591         QETH_DBF_TEXT_(TRACE, 3, "%s", CARD_BUS_ID(card));
 592         QETH_DBF_HEX(TRACE, 3, addr->sa_data, OSA_ADDR_LEN);
 593         rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
 594         if (!rc)
 595                 rc = qeth_l2_send_setmac(card, addr->sa_data);
 596         return rc;
 597 }
 598
 599 static void qeth_l2_set_multicast_list(struct net_device *dev)
 600 {
 601         struct qeth_card *card = dev->ml_priv;
 602         struct dev_addr_list *dm;
 603
 604         if (card->info.type == QETH_CARD_TYPE_OSN)
 605                 return ;
 606
 607         QETH_DBF_TEXT(TRACE, 3, "setmulti");
 608         qeth_l2_del_all_mc(card);
 609         spin_lock_bh(&card->mclock);
 610         for (dm = dev->mc_list; dm; dm = dm->next)
 611                 qeth_l2_add_mc(card, dm->da_addr, 0);
 612
 613         for (dm = dev->uc_list; dm; dm = dm->next)
 614                 qeth_l2_add_mc(card, dm->da_addr, 1);
 615
 616         spin_unlock_bh(&card->mclock);
 617         if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
 618                 return;
 619         qeth_setadp_promisc_mode(card);
 620 }
 621
 622 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 623 {
 624         int rc;
 625         struct qeth_hdr *hdr = NULL;
 626         int elements = 0;
 627         struct qeth_card *card = dev->ml_priv;
 628         struct sk_buff *new_skb = skb;
 629         int ipv = qeth_get_ip_version(skb);
 630         int cast_type = qeth_get_cast_type(card, skb);
 631         struct qeth_qdio_out_q *queue = card->qdio.out_qs
 632                 [qeth_get_priority_queue(card, skb, ipv, cast_type)];
 633         int tx_bytes = skb->len;
 634         enum qeth_large_send_types large_send = QETH_LARGE_SEND_NO;
 635         struct qeth_eddp_context *ctx = NULL;
 636         int data_offset = -1;
 637         int elements_needed = 0;
 638         int hd_len = 0;
 639
 640         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
 641                 card->stats.tx_carrier_errors++;
 642                 goto tx_drop;
 643         }
 644
 645         if ((card->info.type == QETH_CARD_TYPE_OSN) &&
 646             (skb->protocol == htons(ETH_P_IPV6)))
 647                 goto tx_drop;
 648
 649         if (card->options.performance_stats) {
 650                 card->perf_stats.outbound_cnt++;
 651                 card->perf_stats.outbound_start_time = qeth_get_micros();
 652         }
 653         netif_stop_queue(dev);
 654
 655         if (skb_is_gso(skb))
 656                 large_send = QETH_LARGE_SEND_EDDP;
 657
 658         if (card->info.type == QETH_CARD_TYPE_OSN)
 659                 hdr = (struct qeth_hdr *)skb->data;
 660         else {
 661                 if ((card->info.type == QETH_CARD_TYPE_IQD) && (!large_send) &&
 662                     (skb_shinfo(skb)->nr_frags == 0)) {
 663                         new_skb = skb;
 664                         data_offset = ETH_HLEN;
 665                         hd_len = ETH_HLEN;
 666                         hdr = kmem_cache_alloc(qeth_core_header_cache,
 667                                                 GFP_ATOMIC);
 668                         if (!hdr)
 669                                 goto tx_drop;
 670                         elements_needed++;
 671                         skb_reset_mac_header(new_skb);
 672                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 673                         hdr->hdr.l2.pkt_length = new_skb->len;
 674                         memcpy(((char *)hdr) + sizeof(struct qeth_hdr),
 675                                 skb_mac_header(new_skb), ETH_HLEN);
 676                 } else {
 677                         /* create a clone with writeable headroom */
 678                         new_skb = skb_realloc_headroom(skb,
 679                                                 sizeof(struct qeth_hdr));
 680                         if (!new_skb)
 681                                 goto tx_drop;
 682                         hdr = (struct qeth_hdr *)skb_push(new_skb,
 683                                                 sizeof(struct qeth_hdr));
 684                         skb_set_mac_header(new_skb, sizeof(struct qeth_hdr));
 685                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 686                 }
 687         }
 688
 689         if (large_send == QETH_LARGE_SEND_EDDP) {
 690                 ctx = qeth_eddp_create_context(card, new_skb, hdr,
 691                                                 skb->sk->sk_protocol);
 692                 if (ctx == NULL) {
 693                         QETH_DBF_MESSAGE(2, "could not create eddp context\n");
 694                         goto tx_drop;
 695                 }
 696         } else {
 697                 elements = qeth_get_elements_no(card, (void *)hdr, new_skb,
 698                                                 elements_needed);
 699                 if (!elements) {
 700                         if (data_offset >= 0)
 701                                 kmem_cache_free(qeth_core_header_cache, hdr);
 702                         goto tx_drop;
 703                 }
 704         }
 705
 706         if ((large_send == QETH_LARGE_SEND_NO) &&
 707             (skb->ip_summed == CHECKSUM_PARTIAL))
 708                 qeth_tx_csum(new_skb);
 709
 710         if (card->info.type != QETH_CARD_TYPE_IQD)
 711                 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
 712                                          elements, ctx);
 713         else
 714                 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
 715                                         elements, ctx, data_offset, hd_len);
 716         if (!rc) {
 717                 card->stats.tx_packets++;
 718                 card->stats.tx_bytes += tx_bytes;
 719                 if (new_skb != skb)
 720                         dev_kfree_skb_any(skb);
 721                 if (card->options.performance_stats) {
 722                         if (large_send != QETH_LARGE_SEND_NO) {
 723                                 card->perf_stats.large_send_bytes += tx_bytes;
 724                                 card->perf_stats.large_send_cnt++;
 725                         }
 726                         if (skb_shinfo(new_skb)->nr_frags > 0) {
 727                                 card->perf_stats.sg_skbs_sent++;
 728                                 /* nr_frags + skb->data */
 729                                 card->perf_stats.sg_frags_sent +=
 730                                         skb_shinfo(new_skb)->nr_frags + 1;
 731                         }
 732                 }
 733
 734                 if (ctx != NULL) {
 735                         qeth_eddp_put_context(ctx);
 736                         dev_kfree_skb_any(new_skb);
 737                 }
 738         } else {
 739                 if (ctx != NULL)
 740                         qeth_eddp_put_context(ctx);
 741
 742                 if (data_offset >= 0)
 743                         kmem_cache_free(qeth_core_header_cache, hdr);
 744
 745                 if (rc == -EBUSY) {
 746                         if (new_skb != skb)
 747                                 dev_kfree_skb_any(new_skb);
 748                         return NETDEV_TX_BUSY;
 749                 } else
 750                         goto tx_drop;
 751         }
 752
 753         netif_wake_queue(dev);
 754         if (card->options.performance_stats)
 755                 card->perf_stats.outbound_time += qeth_get_micros() -
 756                         card->perf_stats.outbound_start_time;
 757         return rc;
 758
 759 tx_drop:
 760         card->stats.tx_dropped++;
 761         card->stats.tx_errors++;
 762         if ((new_skb != skb) && new_skb)
 763                 dev_kfree_skb_any(new_skb);
 764         dev_kfree_skb_any(skb);
 765         netif_wake_queue(dev);
 766         return NETDEV_TX_OK;
 767 }
 768
 769 static void qeth_l2_qdio_input_handler(struct ccw_device *ccwdev,
 770                         unsigned int qdio_err, unsigned int queue,
 771                         int first_element, int count, unsigned long card_ptr)
 772 {
 773         struct net_device *net_dev;
 774         struct qeth_card *card;
 775         struct qeth_qdio_buffer *buffer;
 776         int index;
 777         int i;
 778
 779         card = (struct qeth_card *) card_ptr;
 780         net_dev = card->dev;
 781         if (card->options.performance_stats) {
 782                 card->perf_stats.inbound_cnt++;
 783                 card->perf_stats.inbound_start_time = qeth_get_micros();
 784         }
 785         if (qdio_err & QDIO_ERROR_ACTIVATE_CHECK_CONDITION) {
 786                 QETH_DBF_TEXT(TRACE, 1, "qdinchk");
 787                 QETH_DBF_TEXT_(TRACE, 1, "%s", CARD_BUS_ID(card));
 788                 QETH_DBF_TEXT_(TRACE, 1, "%04X%04X", first_element,
 789                                 count);
 790                 QETH_DBF_TEXT_(TRACE, 1, "%04X", queue);
 791                 qeth_schedule_recovery(card);
 792                 return;
 793         }
 794         for (i = first_element; i < (first_element + count); ++i) {
 795                 index = i % QDIO_MAX_BUFFERS_PER_Q;
 796                 buffer = &card->qdio.in_q->bufs[index];
 797                 if (!(qdio_err &&
 798                       qeth_check_qdio_errors(buffer->buffer, qdio_err, "qinerr")))
 799                         qeth_l2_process_inbound_buffer(card, buffer, index);
 800                 /* clear buffer and give back to hardware */
 801                 qeth_put_buffer_pool_entry(card, buffer->pool_entry);
 802                 qeth_queue_input_buffer(card, index);
 803         }
 804         if (card->options.performance_stats)
 805                 card->perf_stats.inbound_time += qeth_get_micros() -
 806                         card->perf_stats.inbound_start_time;
 807 }
 808
 809 static int qeth_l2_open(struct net_device *dev)
 810 {
 811         struct qeth_card *card = dev->ml_priv;
 812
 813         QETH_DBF_TEXT(TRACE, 4, "qethopen");
 814         if (card->state != CARD_STATE_SOFTSETUP)
 815                 return -ENODEV;
 816
 817         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
 818              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
 819                 QETH_DBF_TEXT(TRACE, 4, "nomacadr");
 820                 return -EPERM;
 821         }
 822         card->data.state = CH_STATE_UP;
 823         card->state = CARD_STATE_UP;
 824         netif_start_queue(dev);
 825
 826         if (!card->lan_online && netif_carrier_ok(dev))
 827                 netif_carrier_off(dev);
 828         return 0;
 829 }
 830
 831
 832 static int qeth_l2_stop(struct net_device *dev)
 833 {
 834         struct qeth_card *card = dev->ml_priv;
 835
 836         QETH_DBF_TEXT(TRACE, 4, "qethstop");
 837         netif_tx_disable(dev);
 838         if (card->state == CARD_STATE_UP)
 839                 card->state = CARD_STATE_SOFTSETUP;
 840         return 0;
 841 }
 842
 843 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 844 {
 845         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 846
 847         INIT_LIST_HEAD(&card->vid_list);
 848         INIT_LIST_HEAD(&card->mc_list);
 849         card->options.layer2 = 1;
 850         card->discipline.input_handler = (qdio_handler_t *)
 851                 qeth_l2_qdio_input_handler;
 852         card->discipline.output_handler = (qdio_handler_t *)
 853                 qeth_qdio_output_handler;
 854         card->discipline.recover = qeth_l2_recover;
 855         return 0;
 856 }
 857
 858 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
 859 {
 860         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
 861
 862         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 863
 864         if (cgdev->state == CCWGROUP_ONLINE) {
 865                 card->use_hard_stop = 1;
 866                 qeth_l2_set_offline(cgdev);
 867         }
 868
 869         if (card->dev) {
 870                 unregister_netdev(card->dev);
 871                 card->dev = NULL;
 872         }
 873
 874         qeth_l2_del_all_mc(card);
 875         return;
 876 }
 877
 878 static int qeth_l2_ethtool_set_tso(struct net_device *dev, u32 data)
 879 {
 880         struct qeth_card *card = dev->ml_priv;
 881
 882         if (data) {
 883                 if (card->options.large_send == QETH_LARGE_SEND_NO) {
 884                         card->options.large_send = QETH_LARGE_SEND_EDDP;
 885                         dev->features |= NETIF_F_TSO;
 886                 }
 887         } else {
 888                 dev->features &= ~NETIF_F_TSO;
 889                 card->options.large_send = QETH_LARGE_SEND_NO;
 890         }
 891         return 0;
 892 }
 893
 894 static struct ethtool_ops qeth_l2_ethtool_ops = {
 895         .get_link = ethtool_op_get_link,
 896         .get_tx_csum = ethtool_op_get_tx_csum,
 897         .set_tx_csum = ethtool_op_set_tx_hw_csum,
 898         .get_sg = ethtool_op_get_sg,
 899         .set_sg = ethtool_op_set_sg,
 900         .get_tso = ethtool_op_get_tso,
 901         .set_tso = qeth_l2_ethtool_set_tso,
 902         .get_strings = qeth_core_get_strings,
 903         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 904         .get_stats_count = qeth_core_get_stats_count,
 905         .get_drvinfo = qeth_core_get_drvinfo,
 906         .get_settings = qeth_core_ethtool_get_settings,
 907 };
 908
 909 static struct ethtool_ops qeth_l2_osn_ops = {
 910         .get_strings = qeth_core_get_strings,
 911         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 912         .get_stats_count = qeth_core_get_stats_count,
 913         .get_drvinfo = qeth_core_get_drvinfo,
 914 };
 915
 916 static int qeth_l2_setup_netdev(struct qeth_card *card)
 917 {
 918         switch (card->info.type) {
 919         case QETH_CARD_TYPE_OSAE:
 920                 card->dev = alloc_etherdev(0);
 921                 break;
 922         case QETH_CARD_TYPE_IQD:
 923                 card->dev = alloc_netdev(0, "hsi%d", ether_setup);
 924                 break;
 925         case QETH_CARD_TYPE_OSN:
 926                 card->dev = alloc_netdev(0, "osn%d", ether_setup);
 927                 card->dev->flags |= IFF_NOARP;
 928                 break;
 929         default:
 930                 card->dev = alloc_etherdev(0);
 931         }
 932
 933         if (!card->dev)
 934                 return -ENODEV;
 935
 936         card->dev->ml_priv = card;
 937         card->dev->tx_timeout = &qeth_tx_timeout;
 938         card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
 939         card->dev->open = qeth_l2_open;
 940         card->dev->stop = qeth_l2_stop;
 941         card->dev->hard_start_xmit = qeth_l2_hard_start_xmit;
 942         card->dev->do_ioctl = qeth_l2_do_ioctl;
 943         card->dev->get_stats = qeth_get_stats;
 944         card->dev->change_mtu = qeth_change_mtu;
 945         card->dev->set_multicast_list = qeth_l2_set_multicast_list;
 946         card->dev->vlan_rx_kill_vid = qeth_l2_vlan_rx_kill_vid;
 947         card->dev->vlan_rx_add_vid = qeth_l2_vlan_rx_add_vid;
 948         card->dev->set_mac_address = qeth_l2_set_mac_address;
 949         card->dev->mtu = card->info.initial_mtu;
 950         if (card->info.type != QETH_CARD_TYPE_OSN)
 951                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops);
 952         else
 953                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops);
 954         card->dev->features |= NETIF_F_HW_VLAN_FILTER;
 955         card->info.broadcast_capable = 1;
 956         qeth_l2_request_initial_mac(card);
 957         SET_NETDEV_DEV(card->dev, &card->gdev->dev);
 958         return register_netdev(card->dev);
 959 }
 960
 961 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 962 {
 963         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 964         int rc = 0;
 965         enum qeth_card_states recover_flag;
 966
 967         BUG_ON(!card);
 968         QETH_DBF_TEXT(SETUP, 2, "setonlin");
 969         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 970
 971         qeth_set_allowed_threads(card, QETH_RECOVER_THREAD, 1);
 972         if (qeth_wait_for_threads(card, ~QETH_RECOVER_THREAD)) {
 973                 PRINT_WARN("set_online of card %s interrupted by user!\n",
 974                            CARD_BUS_ID(card));
 975                 return -ERESTARTSYS;
 976         }
 977
 978         recover_flag = card->state;
 979         rc = ccw_device_set_online(CARD_RDEV(card));
 980         if (rc) {
 981                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 982                 return -EIO;
 983         }
 984         rc = ccw_device_set_online(CARD_WDEV(card));
 985         if (rc) {
 986                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 987                 return -EIO;
 988         }
 989         rc = ccw_device_set_online(CARD_DDEV(card));
 990         if (rc) {
 991                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 992                 return -EIO;
 993         }
 994
 995         rc = qeth_core_hardsetup_card(card);
 996         if (rc) {
 997                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
 998                 goto out_remove;
 999         }
1000
1001         if (!card->dev && qeth_l2_setup_netdev(card))
1002                 goto out_remove;
1003
1004         if (card->info.type != QETH_CARD_TYPE_OSN)
1005                 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
1006
1007         card->state = CARD_STATE_HARDSETUP;
1008         qeth_print_status_message(card);
1009
1010         /* softsetup */
1011         QETH_DBF_TEXT(SETUP, 2, "softsetp");
1012
1013         rc = qeth_send_startlan(card);
1014         if (rc) {
1015                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1016                 if (rc == 0xe080) {
1017                         PRINT_WARN("LAN on card %s if offline! "
1018                                    "Waiting for STARTLAN from card.\n",
1019                                    CARD_BUS_ID(card));
1020                         card->lan_online = 0;
1021                 }
1022                 return rc;
1023         } else
1024                 card->lan_online = 1;
1025
1026         if (card->info.type != QETH_CARD_TYPE_OSN) {
1027                 qeth_set_large_send(card, card->options.large_send);
1028                 qeth_l2_process_vlans(card, 0);
1029         }
1030
1031         netif_tx_disable(card->dev);
1032
1033         rc = qeth_init_qdio_queues(card);
1034         if (rc) {
1035                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1036                 goto out_remove;
1037         }
1038         card->state = CARD_STATE_SOFTSETUP;
1039         netif_carrier_on(card->dev);
1040
1041         qeth_set_allowed_threads(card, 0xffffffff, 0);
1042         if (recover_flag == CARD_STATE_RECOVER) {
1043                 if (recovery_mode &&
1044                     card->info.type != QETH_CARD_TYPE_OSN) {
1045                         qeth_l2_open(card->dev);
1046                 } else {
1047                         rtnl_lock();
1048                         dev_open(card->dev);
1049                         rtnl_unlock();
1050                 }
1051                 /* this also sets saved unicast addresses */
1052                 qeth_l2_set_multicast_list(card->dev);
1053         }
1054         /* let user_space know that device is online */
1055         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1056         return 0;
1057 out_remove:
1058         card->use_hard_stop = 1;
1059         qeth_l2_stop_card(card, 0);
1060         ccw_device_set_offline(CARD_DDEV(card));
1061         ccw_device_set_offline(CARD_WDEV(card));
1062         ccw_device_set_offline(CARD_RDEV(card));
1063         if (recover_flag == CARD_STATE_RECOVER)
1064                 card->state = CARD_STATE_RECOVER;
1065         else
1066                 card->state = CARD_STATE_DOWN;
1067         return -ENODEV;
1068 }
1069
1070 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1071 {
1072         return __qeth_l2_set_online(gdev, 0);
1073 }
1074
1075 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1076                                         int recovery_mode)
1077 {
1078         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1079         int rc = 0, rc2 = 0, rc3 = 0;
1080         enum qeth_card_states recover_flag;
1081
1082         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1083         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1084
1085         if (card->dev && netif_carrier_ok(card->dev))
1086                 netif_carrier_off(card->dev);
1087         recover_flag = card->state;
1088         if (qeth_l2_stop_card(card, recovery_mode) == -ERESTARTSYS) {
1089                 PRINT_WARN("Stopping card %s interrupted by user!\n",
1090                            CARD_BUS_ID(card));
1091                 return -ERESTARTSYS;
1092         }
1093         rc  = ccw_device_set_offline(CARD_DDEV(card));
1094         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1095         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1096         if (!rc)
1097                 rc = (rc2) ? rc2 : rc3;
1098         if (rc)
1099                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1100         if (recover_flag == CARD_STATE_UP)
1101                 card->state = CARD_STATE_RECOVER;
1102         /* let user_space know that device is offline */
1103         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1104         return 0;
1105 }
1106
1107 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1108 {
1109         return __qeth_l2_set_offline(cgdev, 0);
1110 }
1111
1112 static int qeth_l2_recover(void *ptr)
1113 {
1114         struct qeth_card *card;
1115         int rc = 0;
1116
1117         card = (struct qeth_card *) ptr;
1118         QETH_DBF_TEXT(TRACE, 2, "recover1");
1119         QETH_DBF_HEX(TRACE, 2, &card, sizeof(void *));
1120         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1121                 return 0;
1122         QETH_DBF_TEXT(TRACE, 2, "recover2");
1123         PRINT_WARN("Recovery of device %s started ...\n",
1124                    CARD_BUS_ID(card));
1125         card->use_hard_stop = 1;
1126         __qeth_l2_set_offline(card->gdev, 1);
1127         rc = __qeth_l2_set_online(card->gdev, 1);
1128         /* don't run another scheduled recovery */
1129         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1130         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1131         if (!rc)
1132                 PRINT_INFO("Device %s successfully recovered!\n",
1133                            CARD_BUS_ID(card));
1134         else {
1135                 rtnl_lock();
1136                 dev_close(card->dev);
1137                 rtnl_unlock();
1138                 PRINT_INFO("Device %s could not be recovered!\n",
1139                            CARD_BUS_ID(card));
1140         }
1141         return 0;
1142 }
1143
1144 static int __init qeth_l2_init(void)
1145 {
1146         PRINT_INFO("register layer 2 discipline\n");
1147         return 0;
1148 }
1149
1150 static void __exit qeth_l2_exit(void)
1151 {
1152         PRINT_INFO("unregister layer 2 discipline\n");
1153 }
1154
1155 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1156 {
1157         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1158         qeth_qdio_clear_card(card, 0);
1159         qeth_clear_qdio_buffers(card);
1160 }
1161
1162 struct ccwgroup_driver qeth_l2_ccwgroup_driver = {
1163         .probe = qeth_l2_probe_device,
1164         .remove = qeth_l2_remove_device,
1165         .set_online = qeth_l2_set_online,
1166         .set_offline = qeth_l2_set_offline,
1167         .shutdown = qeth_l2_shutdown,
1168 };
1169 EXPORT_SYMBOL_GPL(qeth_l2_ccwgroup_driver);
1170
1171 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1172                            struct qeth_cmd_buffer *iob)
1173 {
1174         unsigned long flags;
1175         int rc = 0;
1176
1177         QETH_DBF_TEXT(TRACE, 5, "osndctrd");
1178
1179         wait_event(card->wait_q,
1180                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1181         qeth_prepare_control_data(card, len, iob);
1182         QETH_DBF_TEXT(TRACE, 6, "osnoirqp");
1183         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1184         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1185                               (addr_t) iob, 0, 0);
1186         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1187         if (rc) {
1188                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1189                            "ccw_device_start rc = %i\n", rc);
1190                 QETH_DBF_TEXT_(TRACE, 2, " err%d", rc);
1191                 qeth_release_buffer(iob->channel, iob);
1192                 atomic_set(&card->write.irq_pending, 0);
1193                 wake_up(&card->wait_q);
1194         }
1195         return rc;
1196 }
1197
1198 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1199                         struct qeth_cmd_buffer *iob, int data_len)
1200 {
1201         u16 s1, s2;
1202
1203         QETH_DBF_TEXT(TRACE, 4, "osndipa");
1204
1205         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1206         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1207         s2 = (u16)data_len;
1208         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1209         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1210         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1211         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1212         return qeth_osn_send_control_data(card, s1, iob);
1213 }
1214
1215 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1216 {
1217         struct qeth_cmd_buffer *iob;
1218         struct qeth_card *card;
1219         int rc;
1220
1221         QETH_DBF_TEXT(TRACE, 2, "osnsdmc");
1222         if (!dev)
1223                 return -ENODEV;
1224         card = dev->ml_priv;
1225         if (!card)
1226                 return -ENODEV;
1227         if ((card->state != CARD_STATE_UP) &&
1228             (card->state != CARD_STATE_SOFTSETUP))
1229                 return -ENODEV;
1230         iob = qeth_wait_for_buffer(&card->write);
1231         memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1232         rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1233         return rc;
1234 }
1235 EXPORT_SYMBOL(qeth_osn_assist);
1236
1237 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1238                   int (*assist_cb)(struct net_device *, void *),
1239                   int (*data_cb)(struct sk_buff *))
1240 {
1241         struct qeth_card *card;
1242
1243         QETH_DBF_TEXT(TRACE, 2, "osnreg");
1244         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1245         if (*dev == NULL)
1246                 return -ENODEV;
1247         card = (*dev)->ml_priv;
1248         if (!card)
1249                 return -ENODEV;
1250         if ((assist_cb == NULL) || (data_cb == NULL))
1251                 return -EINVAL;
1252         card->osn_info.assist_cb = assist_cb;
1253         card->osn_info.data_cb = data_cb;
1254         return 0;
1255 }
1256 EXPORT_SYMBOL(qeth_osn_register);
1257
1258 void qeth_osn_deregister(struct net_device *dev)
1259 {
1260         struct qeth_card *card;
1261
1262         QETH_DBF_TEXT(TRACE, 2, "osndereg");
1263         if (!dev)
1264                 return;
1265         card = dev->ml_priv;
1266         if (!card)
1267                 return;
1268         card->osn_info.assist_cb = NULL;
1269         card->osn_info.data_cb = NULL;
1270         return;
1271 }
1272 EXPORT_SYMBOL(qeth_osn_deregister);
1273
1274 module_init(qeth_l2_init);
1275 module_exit(qeth_l2_exit);
1276 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1277 MODULE_DESCRIPTION("qeth layer 2 discipline");
1278 MODULE_LICENSE("GPL");