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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 #define KMSG_COMPONENT "qeth"
  12 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  13
  14 #include <linux/module.h>
  15 #include <linux/moduleparam.h>
  16 #include <linux/string.h>
  17 #include <linux/errno.h>
  18 #include <linux/kernel.h>
  19 #include <linux/etherdevice.h>
  20 #include <linux/mii.h>
  21 #include <linux/ip.h>
  22
  23 #include "qeth_core.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         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 331                 QETH_DBF_TEXT(TRACE, 3, "aidREC");
 332                 return;
 333         }
 334         id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
 335         if (id) {
 336                 id->vid = vid;
 337                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
 338                 spin_lock_bh(&card->vlanlock);
 339                 list_add_tail(&id->list, &card->vid_list);
 340                 spin_unlock_bh(&card->vlanlock);
 341         }
 342 }
 343
 344 static void qeth_l2_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
 345 {
 346         struct qeth_vlan_vid *id, *tmpid = NULL;
 347         struct qeth_card *card = dev->ml_priv;
 348
 349         QETH_DBF_TEXT_(TRACE, 4, "kid:%d", vid);
 350         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 351                 QETH_DBF_TEXT(TRACE, 3, "kidREC");
 352                 return;
 353         }
 354         spin_lock_bh(&card->vlanlock);
 355         list_for_each_entry(id, &card->vid_list, list) {
 356                 if (id->vid == vid) {
 357                         list_del(&id->list);
 358                         tmpid = id;
 359                         break;
 360                 }
 361         }
 362         spin_unlock_bh(&card->vlanlock);
 363         if (tmpid) {
 364                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 365                 kfree(tmpid);
 366         }
 367         qeth_l2_set_multicast_list(card->dev);
 368 }
 369
 370 static int qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
 371 {
 372         int rc = 0;
 373
 374         QETH_DBF_TEXT(SETUP , 2, "stopcard");
 375         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 376
 377         qeth_set_allowed_threads(card, 0, 1);
 378         if (card->read.state == CH_STATE_UP &&
 379             card->write.state == CH_STATE_UP &&
 380             (card->state == CARD_STATE_UP)) {
 381                 if (recovery_mode &&
 382                     card->info.type != QETH_CARD_TYPE_OSN) {
 383                         qeth_l2_stop(card->dev);
 384                 } else {
 385                         rtnl_lock();
 386                         dev_close(card->dev);
 387                         rtnl_unlock();
 388                 }
 389                 if (!card->use_hard_stop ||
 390                         recovery_mode) {
 391                         __u8 *mac = &card->dev->dev_addr[0];
 392                         rc = qeth_l2_send_delmac(card, mac);
 393                         QETH_DBF_TEXT_(SETUP, 2, "Lerr%d", rc);
 394                 }
 395                 card->state = CARD_STATE_SOFTSETUP;
 396         }
 397         if (card->state == CARD_STATE_SOFTSETUP) {
 398                 qeth_l2_process_vlans(card, 1);
 399                 if (!card->use_hard_stop ||
 400                         recovery_mode)
 401                         qeth_l2_del_all_mc(card);
 402                 qeth_clear_ipacmd_list(card);
 403                 card->state = CARD_STATE_HARDSETUP;
 404         }
 405         if (card->state == CARD_STATE_HARDSETUP) {
 406                 qeth_qdio_clear_card(card, 0);
 407                 qeth_clear_qdio_buffers(card);
 408                 qeth_clear_working_pool_list(card);
 409                 card->state = CARD_STATE_DOWN;
 410         }
 411         if (card->state == CARD_STATE_DOWN) {
 412                 qeth_clear_cmd_buffers(&card->read);
 413                 qeth_clear_cmd_buffers(&card->write);
 414         }
 415         card->use_hard_stop = 0;
 416         return rc;
 417 }
 418
 419 static void qeth_l2_process_inbound_buffer(struct qeth_card *card,
 420                             struct qeth_qdio_buffer *buf, int index)
 421 {
 422         struct qdio_buffer_element *element;
 423         struct sk_buff *skb;
 424         struct qeth_hdr *hdr;
 425         int offset;
 426         unsigned int len;
 427
 428         /* get first element of current buffer */
 429         element = (struct qdio_buffer_element *)&buf->buffer->element[0];
 430         offset = 0;
 431         if (card->options.performance_stats)
 432                 card->perf_stats.bufs_rec++;
 433         while ((skb = qeth_core_get_next_skb(card, buf->buffer, &element,
 434                                        &offset, &hdr))) {
 435                 skb->dev = card->dev;
 436                 /* is device UP ? */
 437                 if (!(card->dev->flags & IFF_UP)) {
 438                         dev_kfree_skb_any(skb);
 439                         continue;
 440                 }
 441
 442                 switch (hdr->hdr.l2.id) {
 443                 case QETH_HEADER_TYPE_LAYER2:
 444                         skb->pkt_type = PACKET_HOST;
 445                         skb->protocol = eth_type_trans(skb, skb->dev);
 446                         if (card->options.checksum_type == NO_CHECKSUMMING)
 447                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 448                         else
 449                                 skb->ip_summed = CHECKSUM_NONE;
 450                         if (skb->protocol == htons(ETH_P_802_2))
 451                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
 452                         len = skb->len;
 453                         netif_rx(skb);
 454                         break;
 455                 case QETH_HEADER_TYPE_OSN:
 456                         if (card->info.type == QETH_CARD_TYPE_OSN) {
 457                                 skb_push(skb, sizeof(struct qeth_hdr));
 458                                 skb_copy_to_linear_data(skb, hdr,
 459                                                 sizeof(struct qeth_hdr));
 460                                 len = skb->len;
 461                                 card->osn_info.data_cb(skb);
 462                                 break;
 463                         }
 464                         /* else unknown */
 465                 default:
 466                         dev_kfree_skb_any(skb);
 467                         QETH_DBF_TEXT(TRACE, 3, "inbunkno");
 468                         QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
 469                         continue;
 470                 }
 471                 card->dev->last_rx = jiffies;
 472                 card->stats.rx_packets++;
 473                 card->stats.rx_bytes += len;
 474         }
 475 }
 476
 477 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
 478                            enum qeth_ipa_cmds ipacmd,
 479                            int (*reply_cb) (struct qeth_card *,
 480                                             struct qeth_reply*,
 481                                             unsigned long))
 482 {
 483         struct qeth_ipa_cmd *cmd;
 484         struct qeth_cmd_buffer *iob;
 485
 486         QETH_DBF_TEXT(TRACE, 2, "L2sdmac");
 487         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 488         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 489         cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
 490         memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
 491         return qeth_send_ipa_cmd(card, iob, reply_cb, NULL);
 492 }
 493
 494 static int qeth_l2_send_setmac_cb(struct qeth_card *card,
 495                            struct qeth_reply *reply,
 496                            unsigned long data)
 497 {
 498         struct qeth_ipa_cmd *cmd;
 499
 500         QETH_DBF_TEXT(TRACE, 2, "L2Smaccb");
 501         cmd = (struct qeth_ipa_cmd *) data;
 502         if (cmd->hdr.return_code) {
 503                 QETH_DBF_TEXT_(TRACE, 2, "L2er%x", cmd->hdr.return_code);
 504                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 505                 cmd->hdr.return_code = -EIO;
 506         } else {
 507                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 508                 memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
 509                        OSA_ADDR_LEN);
 510                 dev_info(&card->gdev->dev,
 511                         "MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x "
 512                         "successfully registered on device %s\n",
 513                         card->dev->dev_addr[0], card->dev->dev_addr[1],
 514                         card->dev->dev_addr[2], card->dev->dev_addr[3],
 515                         card->dev->dev_addr[4], card->dev->dev_addr[5],
 516                         card->dev->name);
 517         }
 518         return 0;
 519 }
 520
 521 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
 522 {
 523         QETH_DBF_TEXT(TRACE, 2, "L2Setmac");
 524         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
 525                                           qeth_l2_send_setmac_cb);
 526 }
 527
 528 static int qeth_l2_send_delmac_cb(struct qeth_card *card,
 529                            struct qeth_reply *reply,
 530                            unsigned long data)
 531 {
 532         struct qeth_ipa_cmd *cmd;
 533
 534         QETH_DBF_TEXT(TRACE, 2, "L2Dmaccb");
 535         cmd = (struct qeth_ipa_cmd *) data;
 536         if (cmd->hdr.return_code) {
 537                 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
 538                 cmd->hdr.return_code = -EIO;
 539                 return 0;
 540         }
 541         card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 542
 543         return 0;
 544 }
 545
 546 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
 547 {
 548         QETH_DBF_TEXT(TRACE, 2, "L2Delmac");
 549         if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
 550                 return 0;
 551         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
 552                                           qeth_l2_send_delmac_cb);
 553 }
 554
 555 static int qeth_l2_request_initial_mac(struct qeth_card *card)
 556 {
 557         int rc = 0;
 558         char vendor_pre[] = {0x02, 0x00, 0x00};
 559
 560         QETH_DBF_TEXT(SETUP, 2, "doL2init");
 561         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
 562
 563         rc = qeth_query_setadapterparms(card);
 564         if (rc) {
 565                 QETH_DBF_MESSAGE(2, "could not query adapter parameters on "
 566                         "device %s: x%x\n", CARD_BUS_ID(card), rc);
 567         }
 568
 569         if ((card->info.type == QETH_CARD_TYPE_IQD) ||
 570             (card->info.guestlan)) {
 571                 rc = qeth_setadpparms_change_macaddr(card);
 572                 if (rc) {
 573                         QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
 574                                 "device %s: x%x\n", CARD_BUS_ID(card), rc);
 575                         QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 576                         return rc;
 577                 }
 578                 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN);
 579         } else {
 580                 random_ether_addr(card->dev->dev_addr);
 581                 memcpy(card->dev->dev_addr, vendor_pre, 3);
 582         }
 583         return 0;
 584 }
 585
 586 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 587 {
 588         struct sockaddr *addr = p;
 589         struct qeth_card *card = dev->ml_priv;
 590         int rc = 0;
 591
 592         QETH_DBF_TEXT(TRACE, 3, "setmac");
 593
 594         if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
 595                 QETH_DBF_TEXT(TRACE, 3, "setmcINV");
 596                 return -EOPNOTSUPP;
 597         }
 598
 599         if (card->info.type == QETH_CARD_TYPE_OSN) {
 600                 QETH_DBF_TEXT(TRACE, 3, "setmcOSN");
 601                 return -EOPNOTSUPP;
 602         }
 603         QETH_DBF_TEXT_(TRACE, 3, "%s", CARD_BUS_ID(card));
 604         QETH_DBF_HEX(TRACE, 3, addr->sa_data, OSA_ADDR_LEN);
 605         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 606                 QETH_DBF_TEXT(TRACE, 3, "setmcREC");
 607                 return -ERESTARTSYS;
 608         }
 609         rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
 610         if (!rc)
 611                 rc = qeth_l2_send_setmac(card, addr->sa_data);
 612         return rc;
 613 }
 614
 615 static void qeth_l2_set_multicast_list(struct net_device *dev)
 616 {
 617         struct qeth_card *card = dev->ml_priv;
 618         struct dev_addr_list *dm;
 619
 620         if (card->info.type == QETH_CARD_TYPE_OSN)
 621                 return ;
 622
 623         QETH_DBF_TEXT(TRACE, 3, "setmulti");
 624         if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
 625             (card->state != CARD_STATE_UP))
 626                 return;
 627         qeth_l2_del_all_mc(card);
 628         spin_lock_bh(&card->mclock);
 629         for (dm = dev->mc_list; dm; dm = dm->next)
 630                 qeth_l2_add_mc(card, dm->da_addr, 0);
 631
 632         for (dm = dev->uc_list; dm; dm = dm->next)
 633                 qeth_l2_add_mc(card, dm->da_addr, 1);
 634
 635         spin_unlock_bh(&card->mclock);
 636         if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
 637                 return;
 638         qeth_setadp_promisc_mode(card);
 639 }
 640
 641 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 642 {
 643         int rc;
 644         struct qeth_hdr *hdr = NULL;
 645         int elements = 0;
 646         struct qeth_card *card = dev->ml_priv;
 647         struct sk_buff *new_skb = skb;
 648         int ipv = qeth_get_ip_version(skb);
 649         int cast_type = qeth_get_cast_type(card, skb);
 650         struct qeth_qdio_out_q *queue = card->qdio.out_qs
 651                 [qeth_get_priority_queue(card, skb, ipv, cast_type)];
 652         int tx_bytes = skb->len;
 653         int data_offset = -1;
 654         int elements_needed = 0;
 655         int hd_len = 0;
 656
 657         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
 658                 card->stats.tx_carrier_errors++;
 659                 goto tx_drop;
 660         }
 661
 662         if ((card->info.type == QETH_CARD_TYPE_OSN) &&
 663             (skb->protocol == htons(ETH_P_IPV6)))
 664                 goto tx_drop;
 665
 666         if (card->options.performance_stats) {
 667                 card->perf_stats.outbound_cnt++;
 668                 card->perf_stats.outbound_start_time = qeth_get_micros();
 669         }
 670         netif_stop_queue(dev);
 671
 672         if (card->info.type == QETH_CARD_TYPE_OSN)
 673                 hdr = (struct qeth_hdr *)skb->data;
 674         else {
 675                 if (card->info.type == QETH_CARD_TYPE_IQD) {
 676                         new_skb = skb;
 677                         data_offset = ETH_HLEN;
 678                         hd_len = ETH_HLEN;
 679                         hdr = kmem_cache_alloc(qeth_core_header_cache,
 680                                                 GFP_ATOMIC);
 681                         if (!hdr)
 682                                 goto tx_drop;
 683                         elements_needed++;
 684                         skb_reset_mac_header(new_skb);
 685                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 686                         hdr->hdr.l2.pkt_length = new_skb->len;
 687                         memcpy(((char *)hdr) + sizeof(struct qeth_hdr),
 688                                 skb_mac_header(new_skb), ETH_HLEN);
 689                 } else {
 690                         /* create a clone with writeable headroom */
 691                         new_skb = skb_realloc_headroom(skb,
 692                                                 sizeof(struct qeth_hdr));
 693                         if (!new_skb)
 694                                 goto tx_drop;
 695                         hdr = (struct qeth_hdr *)skb_push(new_skb,
 696                                                 sizeof(struct qeth_hdr));
 697                         skb_set_mac_header(new_skb, sizeof(struct qeth_hdr));
 698                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 699                 }
 700         }
 701
 702         elements = qeth_get_elements_no(card, (void *)hdr, new_skb,
 703                                                 elements_needed);
 704         if (!elements) {
 705                 if (data_offset >= 0)
 706                         kmem_cache_free(qeth_core_header_cache, hdr);
 707                 goto tx_drop;
 708         }
 709
 710         if (card->info.type != QETH_CARD_TYPE_IQD)
 711                 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
 712                                          elements);
 713         else
 714                 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
 715                                         elements, 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         } else {
 722                 if (data_offset >= 0)
 723                         kmem_cache_free(qeth_core_header_cache, hdr);
 724
 725                 if (rc == -EBUSY) {
 726                         if (new_skb != skb)
 727                                 dev_kfree_skb_any(new_skb);
 728                         return NETDEV_TX_BUSY;
 729                 } else
 730                         goto tx_drop;
 731         }
 732
 733         netif_wake_queue(dev);
 734         if (card->options.performance_stats)
 735                 card->perf_stats.outbound_time += qeth_get_micros() -
 736                         card->perf_stats.outbound_start_time;
 737         return rc;
 738
 739 tx_drop:
 740         card->stats.tx_dropped++;
 741         card->stats.tx_errors++;
 742         if ((new_skb != skb) && new_skb)
 743                 dev_kfree_skb_any(new_skb);
 744         dev_kfree_skb_any(skb);
 745         netif_wake_queue(dev);
 746         return NETDEV_TX_OK;
 747 }
 748
 749 static void qeth_l2_qdio_input_handler(struct ccw_device *ccwdev,
 750                         unsigned int qdio_err, unsigned int queue,
 751                         int first_element, int count, unsigned long card_ptr)
 752 {
 753         struct net_device *net_dev;
 754         struct qeth_card *card;
 755         struct qeth_qdio_buffer *buffer;
 756         int index;
 757         int i;
 758
 759         card = (struct qeth_card *) card_ptr;
 760         net_dev = card->dev;
 761         if (card->options.performance_stats) {
 762                 card->perf_stats.inbound_cnt++;
 763                 card->perf_stats.inbound_start_time = qeth_get_micros();
 764         }
 765         if (qdio_err & QDIO_ERROR_ACTIVATE_CHECK_CONDITION) {
 766                 QETH_DBF_TEXT(TRACE, 1, "qdinchk");
 767                 QETH_DBF_TEXT_(TRACE, 1, "%s", CARD_BUS_ID(card));
 768                 QETH_DBF_TEXT_(TRACE, 1, "%04X%04X", first_element,
 769                                 count);
 770                 QETH_DBF_TEXT_(TRACE, 1, "%04X", queue);
 771                 qeth_schedule_recovery(card);
 772                 return;
 773         }
 774         for (i = first_element; i < (first_element + count); ++i) {
 775                 index = i % QDIO_MAX_BUFFERS_PER_Q;
 776                 buffer = &card->qdio.in_q->bufs[index];
 777                 if (!(qdio_err &&
 778                       qeth_check_qdio_errors(buffer->buffer, qdio_err, "qinerr")))
 779                         qeth_l2_process_inbound_buffer(card, buffer, index);
 780                 /* clear buffer and give back to hardware */
 781                 qeth_put_buffer_pool_entry(card, buffer->pool_entry);
 782                 qeth_queue_input_buffer(card, index);
 783         }
 784         if (card->options.performance_stats)
 785                 card->perf_stats.inbound_time += qeth_get_micros() -
 786                         card->perf_stats.inbound_start_time;
 787 }
 788
 789 static int qeth_l2_open(struct net_device *dev)
 790 {
 791         struct qeth_card *card = dev->ml_priv;
 792
 793         QETH_DBF_TEXT(TRACE, 4, "qethopen");
 794         if (card->state != CARD_STATE_SOFTSETUP)
 795                 return -ENODEV;
 796
 797         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
 798              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
 799                 QETH_DBF_TEXT(TRACE, 4, "nomacadr");
 800                 return -EPERM;
 801         }
 802         card->data.state = CH_STATE_UP;
 803         card->state = CARD_STATE_UP;
 804         netif_start_queue(dev);
 805
 806         if (!card->lan_online && netif_carrier_ok(dev))
 807                 netif_carrier_off(dev);
 808         return 0;
 809 }
 810
 811
 812 static int qeth_l2_stop(struct net_device *dev)
 813 {
 814         struct qeth_card *card = dev->ml_priv;
 815
 816         QETH_DBF_TEXT(TRACE, 4, "qethstop");
 817         netif_tx_disable(dev);
 818         if (card->state == CARD_STATE_UP)
 819                 card->state = CARD_STATE_SOFTSETUP;
 820         return 0;
 821 }
 822
 823 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 824 {
 825         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 826
 827         INIT_LIST_HEAD(&card->vid_list);
 828         INIT_LIST_HEAD(&card->mc_list);
 829         card->options.layer2 = 1;
 830         card->discipline.input_handler = (qdio_handler_t *)
 831                 qeth_l2_qdio_input_handler;
 832         card->discipline.output_handler = (qdio_handler_t *)
 833                 qeth_qdio_output_handler;
 834         card->discipline.recover = qeth_l2_recover;
 835         return 0;
 836 }
 837
 838 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
 839 {
 840         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
 841
 842         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 843
 844         if (cgdev->state == CCWGROUP_ONLINE) {
 845                 card->use_hard_stop = 1;
 846                 qeth_l2_set_offline(cgdev);
 847         }
 848
 849         if (card->dev) {
 850                 unregister_netdev(card->dev);
 851                 card->dev = NULL;
 852         }
 853
 854         qeth_l2_del_all_mc(card);
 855         return;
 856 }
 857
 858 static struct ethtool_ops qeth_l2_ethtool_ops = {
 859         .get_link = ethtool_op_get_link,
 860         .get_strings = qeth_core_get_strings,
 861         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 862         .get_stats_count = qeth_core_get_stats_count,
 863         .get_drvinfo = qeth_core_get_drvinfo,
 864         .get_settings = qeth_core_ethtool_get_settings,
 865 };
 866
 867 static struct ethtool_ops qeth_l2_osn_ops = {
 868         .get_strings = qeth_core_get_strings,
 869         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 870         .get_stats_count = qeth_core_get_stats_count,
 871         .get_drvinfo = qeth_core_get_drvinfo,
 872 };
 873
 874 static const struct net_device_ops qeth_l2_netdev_ops = {
 875         .ndo_open               = qeth_l2_open,
 876         .ndo_stop               = qeth_l2_stop,
 877         .ndo_get_stats          = qeth_get_stats,
 878         .ndo_start_xmit         = qeth_l2_hard_start_xmit,
 879         .ndo_validate_addr      = eth_validate_addr,
 880         .ndo_set_multicast_list = qeth_l2_set_multicast_list,
 881         .ndo_do_ioctl           = qeth_l2_do_ioctl,
 882         .ndo_set_mac_address    = qeth_l2_set_mac_address,
 883         .ndo_change_mtu         = qeth_change_mtu,
 884         .ndo_vlan_rx_add_vid    = qeth_l2_vlan_rx_add_vid,
 885         .ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,
 886         .ndo_tx_timeout         = qeth_tx_timeout,
 887 };
 888
 889 static int qeth_l2_setup_netdev(struct qeth_card *card)
 890 {
 891         switch (card->info.type) {
 892         case QETH_CARD_TYPE_OSAE:
 893                 card->dev = alloc_etherdev(0);
 894                 break;
 895         case QETH_CARD_TYPE_IQD:
 896                 card->dev = alloc_netdev(0, "hsi%d", ether_setup);
 897                 break;
 898         case QETH_CARD_TYPE_OSN:
 899                 card->dev = alloc_netdev(0, "osn%d", ether_setup);
 900                 card->dev->flags |= IFF_NOARP;
 901                 break;
 902         default:
 903                 card->dev = alloc_etherdev(0);
 904         }
 905
 906         if (!card->dev)
 907                 return -ENODEV;
 908
 909         card->dev->ml_priv = card;
 910         card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
 911         card->dev->mtu = card->info.initial_mtu;
 912         card->dev->netdev_ops = &qeth_l2_netdev_ops;
 913         if (card->info.type != QETH_CARD_TYPE_OSN)
 914                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops);
 915         else
 916                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops);
 917         card->dev->features |= NETIF_F_HW_VLAN_FILTER;
 918         card->info.broadcast_capable = 1;
 919         qeth_l2_request_initial_mac(card);
 920         SET_NETDEV_DEV(card->dev, &card->gdev->dev);
 921         return register_netdev(card->dev);
 922 }
 923
 924 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 925 {
 926         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 927         int rc = 0;
 928         enum qeth_card_states recover_flag;
 929
 930         BUG_ON(!card);
 931         QETH_DBF_TEXT(SETUP, 2, "setonlin");
 932         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 933
 934         qeth_set_allowed_threads(card, QETH_RECOVER_THREAD, 1);
 935         recover_flag = card->state;
 936         rc = ccw_device_set_online(CARD_RDEV(card));
 937         if (rc) {
 938                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 939                 return -EIO;
 940         }
 941         rc = ccw_device_set_online(CARD_WDEV(card));
 942         if (rc) {
 943                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 944                 return -EIO;
 945         }
 946         rc = ccw_device_set_online(CARD_DDEV(card));
 947         if (rc) {
 948                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 949                 return -EIO;
 950         }
 951
 952         rc = qeth_core_hardsetup_card(card);
 953         if (rc) {
 954                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
 955                 goto out_remove;
 956         }
 957
 958         if (!card->dev && qeth_l2_setup_netdev(card))
 959                 goto out_remove;
 960
 961         if (card->info.type != QETH_CARD_TYPE_OSN)
 962                 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
 963
 964         card->state = CARD_STATE_HARDSETUP;
 965         qeth_print_status_message(card);
 966
 967         /* softsetup */
 968         QETH_DBF_TEXT(SETUP, 2, "softsetp");
 969
 970         rc = qeth_send_startlan(card);
 971         if (rc) {
 972                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 973                 if (rc == 0xe080) {
 974                         dev_warn(&card->gdev->dev,
 975                                 "The LAN is offline\n");
 976                         card->lan_online = 0;
 977                 }
 978                 return rc;
 979         } else
 980                 card->lan_online = 1;
 981
 982         if (card->info.type != QETH_CARD_TYPE_OSN) {
 983                 qeth_set_large_send(card, card->options.large_send);
 984                 qeth_l2_process_vlans(card, 0);
 985         }
 986
 987         netif_tx_disable(card->dev);
 988
 989         rc = qeth_init_qdio_queues(card);
 990         if (rc) {
 991                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
 992                 goto out_remove;
 993         }
 994         card->state = CARD_STATE_SOFTSETUP;
 995         netif_carrier_on(card->dev);
 996
 997         qeth_set_allowed_threads(card, 0xffffffff, 0);
 998         if (recover_flag == CARD_STATE_RECOVER) {
 999                 if (recovery_mode &&
1000                     card->info.type != QETH_CARD_TYPE_OSN) {
1001                         qeth_l2_open(card->dev);
1002                 } else {
1003                         rtnl_lock();
1004                         dev_open(card->dev);
1005                         rtnl_unlock();
1006                 }
1007                 /* this also sets saved unicast addresses */
1008                 qeth_l2_set_multicast_list(card->dev);
1009         }
1010         /* let user_space know that device is online */
1011         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1012         return 0;
1013 out_remove:
1014         card->use_hard_stop = 1;
1015         qeth_l2_stop_card(card, 0);
1016         ccw_device_set_offline(CARD_DDEV(card));
1017         ccw_device_set_offline(CARD_WDEV(card));
1018         ccw_device_set_offline(CARD_RDEV(card));
1019         if (recover_flag == CARD_STATE_RECOVER)
1020                 card->state = CARD_STATE_RECOVER;
1021         else
1022                 card->state = CARD_STATE_DOWN;
1023         return -ENODEV;
1024 }
1025
1026 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1027 {
1028         return __qeth_l2_set_online(gdev, 0);
1029 }
1030
1031 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1032                                         int recovery_mode)
1033 {
1034         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1035         int rc = 0, rc2 = 0, rc3 = 0;
1036         enum qeth_card_states recover_flag;
1037
1038         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1039         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1040
1041         if (card->dev && netif_carrier_ok(card->dev))
1042                 netif_carrier_off(card->dev);
1043         recover_flag = card->state;
1044         qeth_l2_stop_card(card, recovery_mode);
1045         rc  = ccw_device_set_offline(CARD_DDEV(card));
1046         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1047         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1048         if (!rc)
1049                 rc = (rc2) ? rc2 : rc3;
1050         if (rc)
1051                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1052         if (recover_flag == CARD_STATE_UP)
1053                 card->state = CARD_STATE_RECOVER;
1054         /* let user_space know that device is offline */
1055         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1056         return 0;
1057 }
1058
1059 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1060 {
1061         return __qeth_l2_set_offline(cgdev, 0);
1062 }
1063
1064 static int qeth_l2_recover(void *ptr)
1065 {
1066         struct qeth_card *card;
1067         int rc = 0;
1068
1069         card = (struct qeth_card *) ptr;
1070         QETH_DBF_TEXT(TRACE, 2, "recover1");
1071         QETH_DBF_HEX(TRACE, 2, &card, sizeof(void *));
1072         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1073                 return 0;
1074         QETH_DBF_TEXT(TRACE, 2, "recover2");
1075         dev_warn(&card->gdev->dev,
1076                 "A recovery process has been started for the device\n");
1077         card->use_hard_stop = 1;
1078         __qeth_l2_set_offline(card->gdev, 1);
1079         rc = __qeth_l2_set_online(card->gdev, 1);
1080         /* don't run another scheduled recovery */
1081         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1082         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1083         if (!rc)
1084                 dev_info(&card->gdev->dev,
1085                         "Device successfully recovered!\n");
1086         else {
1087                 if (card->dev) {
1088                         rtnl_lock();
1089                         dev_close(card->dev);
1090                         rtnl_unlock();
1091                 }
1092                 dev_warn(&card->gdev->dev, "The qeth device driver "
1093                         "failed to recover an error on the device\n");
1094         }
1095         return 0;
1096 }
1097
1098 static int __init qeth_l2_init(void)
1099 {
1100         pr_info("register layer 2 discipline\n");
1101         return 0;
1102 }
1103
1104 static void __exit qeth_l2_exit(void)
1105 {
1106         pr_info("unregister layer 2 discipline\n");
1107 }
1108
1109 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1110 {
1111         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1112         qeth_qdio_clear_card(card, 0);
1113         qeth_clear_qdio_buffers(card);
1114 }
1115
1116 struct ccwgroup_driver qeth_l2_ccwgroup_driver = {
1117         .probe = qeth_l2_probe_device,
1118         .remove = qeth_l2_remove_device,
1119         .set_online = qeth_l2_set_online,
1120         .set_offline = qeth_l2_set_offline,
1121         .shutdown = qeth_l2_shutdown,
1122 };
1123 EXPORT_SYMBOL_GPL(qeth_l2_ccwgroup_driver);
1124
1125 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1126                            struct qeth_cmd_buffer *iob)
1127 {
1128         unsigned long flags;
1129         int rc = 0;
1130
1131         QETH_DBF_TEXT(TRACE, 5, "osndctrd");
1132
1133         wait_event(card->wait_q,
1134                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1135         qeth_prepare_control_data(card, len, iob);
1136         QETH_DBF_TEXT(TRACE, 6, "osnoirqp");
1137         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1138         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1139                               (addr_t) iob, 0, 0);
1140         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1141         if (rc) {
1142                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1143                            "ccw_device_start rc = %i\n", rc);
1144                 QETH_DBF_TEXT_(TRACE, 2, " err%d", rc);
1145                 qeth_release_buffer(iob->channel, iob);
1146                 atomic_set(&card->write.irq_pending, 0);
1147                 wake_up(&card->wait_q);
1148         }
1149         return rc;
1150 }
1151
1152 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1153                         struct qeth_cmd_buffer *iob, int data_len)
1154 {
1155         u16 s1, s2;
1156
1157         QETH_DBF_TEXT(TRACE, 4, "osndipa");
1158
1159         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1160         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1161         s2 = (u16)data_len;
1162         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1163         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1164         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1165         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1166         return qeth_osn_send_control_data(card, s1, iob);
1167 }
1168
1169 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1170 {
1171         struct qeth_cmd_buffer *iob;
1172         struct qeth_card *card;
1173         int rc;
1174
1175         QETH_DBF_TEXT(TRACE, 2, "osnsdmc");
1176         if (!dev)
1177                 return -ENODEV;
1178         card = dev->ml_priv;
1179         if (!card)
1180                 return -ENODEV;
1181         if ((card->state != CARD_STATE_UP) &&
1182             (card->state != CARD_STATE_SOFTSETUP))
1183                 return -ENODEV;
1184         iob = qeth_wait_for_buffer(&card->write);
1185         memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1186         rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1187         return rc;
1188 }
1189 EXPORT_SYMBOL(qeth_osn_assist);
1190
1191 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1192                   int (*assist_cb)(struct net_device *, void *),
1193                   int (*data_cb)(struct sk_buff *))
1194 {
1195         struct qeth_card *card;
1196
1197         QETH_DBF_TEXT(TRACE, 2, "osnreg");
1198         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1199         if (*dev == NULL)
1200                 return -ENODEV;
1201         card = (*dev)->ml_priv;
1202         if (!card)
1203                 return -ENODEV;
1204         if ((assist_cb == NULL) || (data_cb == NULL))
1205                 return -EINVAL;
1206         card->osn_info.assist_cb = assist_cb;
1207         card->osn_info.data_cb = data_cb;
1208         return 0;
1209 }
1210 EXPORT_SYMBOL(qeth_osn_register);
1211
1212 void qeth_osn_deregister(struct net_device *dev)
1213 {
1214         struct qeth_card *card;
1215
1216         QETH_DBF_TEXT(TRACE, 2, "osndereg");
1217         if (!dev)
1218                 return;
1219         card = dev->ml_priv;
1220         if (!card)
1221                 return;
1222         card->osn_info.assist_cb = NULL;
1223         card->osn_info.data_cb = NULL;
1224         return;
1225 }
1226 EXPORT_SYMBOL(qeth_osn_deregister);
1227
1228 module_init(qeth_l2_init);
1229 module_exit(qeth_l2_exit);
1230 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1231 MODULE_DESCRIPTION("qeth layer 2 discipline");
1232 MODULE_LICENSE("GPL");