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