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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 #define QETH_DBF_TXT_BUF qeth_l2_dbf_txt_buf
  26 static DEFINE_PER_CPU(char[256], qeth_l2_dbf_txt_buf);
  27
  28 static int qeth_l2_set_offline(struct ccwgroup_device *);
  29 static int qeth_l2_stop(struct net_device *);
  30 static int qeth_l2_send_delmac(struct qeth_card *, __u8 *);
  31 static int qeth_l2_send_setdelmac(struct qeth_card *, __u8 *,
  32                            enum qeth_ipa_cmds,
  33                            int (*reply_cb) (struct qeth_card *,
  34                                             struct qeth_reply*,
  35                                             unsigned long));
  36 static void qeth_l2_set_multicast_list(struct net_device *);
  37 static int qeth_l2_recover(void *);
  38
  39 static int qeth_l2_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
  40 {
  41         struct qeth_card *card = netdev_priv(dev);
  42         struct mii_ioctl_data *mii_data;
  43         int rc = 0;
  44
  45         if (!card)
  46                 return -ENODEV;
  47
  48         if ((card->state != CARD_STATE_UP) &&
  49                 (card->state != CARD_STATE_SOFTSETUP))
  50                 return -ENODEV;
  51
  52         if (card->info.type == QETH_CARD_TYPE_OSN)
  53                 return -EPERM;
  54
  55         switch (cmd) {
  56         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
  57                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
  58                 break;
  59         case SIOC_QETH_GET_CARD_TYPE:
  60                 if ((card->info.type == QETH_CARD_TYPE_OSAE) &&
  61                     !card->info.guestlan)
  62                         return 1;
  63                 return 0;
  64                 break;
  65         case SIOCGMIIPHY:
  66                 mii_data = if_mii(rq);
  67                 mii_data->phy_id = 0;
  68                 break;
  69         case SIOCGMIIREG:
  70                 mii_data = if_mii(rq);
  71                 if (mii_data->phy_id != 0)
  72                         rc = -EINVAL;
  73                 else
  74                         mii_data->val_out = qeth_mdio_read(dev,
  75                                 mii_data->phy_id, mii_data->reg_num);
  76                 break;
  77         default:
  78                 rc = -EOPNOTSUPP;
  79         }
  80         if (rc)
  81                 QETH_DBF_TEXT_(TRACE, 2, "ioce%d", rc);
  82         return rc;
  83 }
  84
  85 static int qeth_l2_verify_dev(struct net_device *dev)
  86 {
  87         struct qeth_card *card;
  88         unsigned long flags;
  89         int rc = 0;
  90
  91         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
  92         list_for_each_entry(card, &qeth_core_card_list.list, list) {
  93                 if (card->dev == dev) {
  94                         rc = QETH_REAL_CARD;
  95                         break;
  96                 }
  97         }
  98         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
  99
 100         return rc;
 101 }
 102
 103 static struct net_device *qeth_l2_netdev_by_devno(unsigned char *read_dev_no)
 104 {
 105         struct qeth_card *card;
 106         struct net_device *ndev;
 107         unsigned char *readno;
 108         __u16 temp_dev_no, card_dev_no;
 109         char *endp;
 110         unsigned long flags;
 111
 112         ndev = NULL;
 113         memcpy(&temp_dev_no, read_dev_no, 2);
 114         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
 115         list_for_each_entry(card, &qeth_core_card_list.list, list) {
 116                 readno = CARD_RDEV_ID(card);
 117                 readno += (strlen(readno) - 4);
 118                 card_dev_no = simple_strtoul(readno, &endp, 16);
 119                 if (card_dev_no == temp_dev_no) {
 120                         ndev = card->dev;
 121                         break;
 122                 }
 123         }
 124         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
 125         return ndev;
 126 }
 127
 128 static int qeth_l2_send_setgroupmac_cb(struct qeth_card *card,
 129                                 struct qeth_reply *reply,
 130                                 unsigned long data)
 131 {
 132         struct qeth_ipa_cmd *cmd;
 133         __u8 *mac;
 134
 135         QETH_DBF_TEXT(TRACE, 2, "L2Sgmacb");
 136         cmd = (struct qeth_ipa_cmd *) data;
 137         mac = &cmd->data.setdelmac.mac[0];
 138         /* MAC already registered, needed in couple/uncouple case */
 139         if (cmd->hdr.return_code == 0x2005) {
 140                 PRINT_WARN("Group MAC %02x:%02x:%02x:%02x:%02x:%02x " \
 141                           "already existing on %s \n",
 142                           mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
 143                           QETH_CARD_IFNAME(card));
 144                 cmd->hdr.return_code = 0;
 145         }
 146         if (cmd->hdr.return_code)
 147                 PRINT_ERR("Could not set group MAC " \
 148                           "%02x:%02x:%02x:%02x:%02x:%02x on %s: %x\n",
 149                           mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
 150                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 151         return 0;
 152 }
 153
 154 static int qeth_l2_send_setgroupmac(struct qeth_card *card, __u8 *mac)
 155 {
 156         QETH_DBF_TEXT(TRACE, 2, "L2Sgmac");
 157         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETGMAC,
 158                                           qeth_l2_send_setgroupmac_cb);
 159 }
 160
 161 static int qeth_l2_send_delgroupmac_cb(struct qeth_card *card,
 162                                 struct qeth_reply *reply,
 163                                 unsigned long data)
 164 {
 165         struct qeth_ipa_cmd *cmd;
 166         __u8 *mac;
 167
 168         QETH_DBF_TEXT(TRACE, 2, "L2Dgmacb");
 169         cmd = (struct qeth_ipa_cmd *) data;
 170         mac = &cmd->data.setdelmac.mac[0];
 171         if (cmd->hdr.return_code)
 172                 PRINT_ERR("Could not delete group MAC " \
 173                           "%02x:%02x:%02x:%02x:%02x:%02x on %s: %x\n",
 174                           mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
 175                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 176         return 0;
 177 }
 178
 179 static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac)
 180 {
 181         QETH_DBF_TEXT(TRACE, 2, "L2Dgmac");
 182         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELGMAC,
 183                                           qeth_l2_send_delgroupmac_cb);
 184 }
 185
 186 static void qeth_l2_add_mc(struct qeth_card *card, __u8 *mac)
 187 {
 188         struct qeth_mc_mac *mc;
 189
 190         mc = kmalloc(sizeof(struct qeth_mc_mac), GFP_ATOMIC);
 191
 192         if (!mc) {
 193                 PRINT_ERR("no mem vor mc mac address\n");
 194                 return;
 195         }
 196
 197         memcpy(mc->mc_addr, mac, OSA_ADDR_LEN);
 198         mc->mc_addrlen = OSA_ADDR_LEN;
 199
 200         if (!qeth_l2_send_setgroupmac(card, mac))
 201                 list_add_tail(&mc->list, &card->mc_list);
 202         else
 203                 kfree(mc);
 204 }
 205
 206 static void qeth_l2_del_all_mc(struct qeth_card *card)
 207 {
 208         struct qeth_mc_mac *mc, *tmp;
 209
 210         spin_lock_bh(&card->mclock);
 211         list_for_each_entry_safe(mc, tmp, &card->mc_list, list) {
 212                 qeth_l2_send_delgroupmac(card, mc->mc_addr);
 213                 list_del(&mc->list);
 214                 kfree(mc);
 215         }
 216         spin_unlock_bh(&card->mclock);
 217 }
 218
 219 static void qeth_l2_get_packet_type(struct qeth_card *card,
 220                         struct qeth_hdr *hdr, struct sk_buff *skb)
 221 {
 222         __u16 hdr_mac;
 223
 224         if (!memcmp(skb->data + QETH_HEADER_SIZE,
 225                     skb->dev->broadcast, 6)) {
 226                 /* broadcast? */
 227                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 228                 return;
 229         }
 230         hdr_mac = *((__u16 *)skb->data);
 231         /* tr multicast? */
 232         switch (card->info.link_type) {
 233         case QETH_LINK_TYPE_HSTR:
 234         case QETH_LINK_TYPE_LANE_TR:
 235                 if ((hdr_mac == QETH_TR_MAC_NC) ||
 236                     (hdr_mac == QETH_TR_MAC_C))
 237                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 238                 else
 239                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 240                 break;
 241                 /* eth or so multicast? */
 242         default:
 243                 if ((hdr_mac == QETH_ETH_MAC_V4) ||
 244                      (hdr_mac == QETH_ETH_MAC_V6))
 245                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 246                 else
 247                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 248         }
 249 }
 250
 251 static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
 252                         struct sk_buff *skb, int ipv, int cast_type)
 253 {
 254         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)((skb->data) +
 255                                         QETH_HEADER_SIZE);
 256
 257         memset(hdr, 0, sizeof(struct qeth_hdr));
 258         hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
 259
 260         /* set byte byte 3 to casting flags */
 261         if (cast_type == RTN_MULTICAST)
 262                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 263         else if (cast_type == RTN_BROADCAST)
 264                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 265         else
 266                 qeth_l2_get_packet_type(card, hdr, skb);
 267
 268         hdr->hdr.l2.pkt_length = skb->len-QETH_HEADER_SIZE;
 269         /* VSWITCH relies on the VLAN
 270          * information to be present in
 271          * the QDIO header */
 272         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
 273                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
 274                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
 275         }
 276 }
 277
 278 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
 279                         struct qeth_reply *reply, unsigned long data)
 280 {
 281         struct qeth_ipa_cmd *cmd;
 282
 283         QETH_DBF_TEXT(TRACE, 2, "L2sdvcb");
 284         cmd = (struct qeth_ipa_cmd *) data;
 285         if (cmd->hdr.return_code) {
 286                 PRINT_ERR("Error in processing VLAN %i on %s: 0x%x. "
 287                           "Continuing\n", cmd->data.setdelvlan.vlan_id,
 288                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 289                 QETH_DBF_TEXT_(TRACE, 2, "L2VL%4x", cmd->hdr.command);
 290                 QETH_DBF_TEXT_(TRACE, 2, "L2%s", CARD_BUS_ID(card));
 291                 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
 292         }
 293         return 0;
 294 }
 295
 296 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
 297                                 enum qeth_ipa_cmds ipacmd)
 298 {
 299         struct qeth_ipa_cmd *cmd;
 300         struct qeth_cmd_buffer *iob;
 301
 302         QETH_DBF_TEXT_(TRACE, 4, "L2sdv%x", ipacmd);
 303         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 304         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 305         cmd->data.setdelvlan.vlan_id = i;
 306         return qeth_send_ipa_cmd(card, iob,
 307                                  qeth_l2_send_setdelvlan_cb, NULL);
 308 }
 309
 310 static void qeth_l2_process_vlans(struct qeth_card *card, int clear)
 311 {
 312         struct qeth_vlan_vid *id;
 313         QETH_DBF_TEXT(TRACE, 3, "L2prcvln");
 314         spin_lock_bh(&card->vlanlock);
 315         list_for_each_entry(id, &card->vid_list, list) {
 316                 if (clear)
 317                         qeth_l2_send_setdelvlan(card, id->vid,
 318                                 IPA_CMD_DELVLAN);
 319                 else
 320                         qeth_l2_send_setdelvlan(card, id->vid,
 321                                 IPA_CMD_SETVLAN);
 322         }
 323         spin_unlock_bh(&card->vlanlock);
 324 }
 325
 326 static void qeth_l2_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
 327 {
 328         struct qeth_card *card = netdev_priv(dev);
 329         struct qeth_vlan_vid *id;
 330
 331         QETH_DBF_TEXT_(TRACE, 4, "aid:%d", vid);
 332         id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
 333         if (id) {
 334                 id->vid = vid;
 335                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
 336                 spin_lock_bh(&card->vlanlock);
 337                 list_add_tail(&id->list, &card->vid_list);
 338                 spin_unlock_bh(&card->vlanlock);
 339         } else {
 340                 PRINT_ERR("no memory for vid\n");
 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 = netdev_priv(dev);
 348
 349         QETH_DBF_TEXT_(TRACE, 4, "kid:%d", vid);
 350         spin_lock_bh(&card->vlanlock);
 351         list_for_each_entry(id, &card->vid_list, list) {
 352                 if (id->vid == vid) {
 353                         list_del(&id->list);
 354                         tmpid = id;
 355                         break;
 356                 }
 357         }
 358         spin_unlock_bh(&card->vlanlock);
 359         if (tmpid) {
 360                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 361                 kfree(tmpid);
 362         }
 363         qeth_l2_set_multicast_list(card->dev);
 364 }
 365
 366 static int qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
 367 {
 368         int rc = 0;
 369
 370         QETH_DBF_TEXT(SETUP , 2, "stopcard");
 371         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 372
 373         qeth_set_allowed_threads(card, 0, 1);
 374         if (qeth_wait_for_threads(card, ~QETH_RECOVER_THREAD))
 375                 return -ERESTARTSYS;
 376         if (card->read.state == CH_STATE_UP &&
 377             card->write.state == CH_STATE_UP &&
 378             (card->state == CARD_STATE_UP)) {
 379                 if (recovery_mode &&
 380                     card->info.type != QETH_CARD_TYPE_OSN) {
 381                         qeth_l2_stop(card->dev);
 382                 } else {
 383                         rtnl_lock();
 384                         dev_close(card->dev);
 385                         rtnl_unlock();
 386                 }
 387                 if (!card->use_hard_stop) {
 388                         __u8 *mac = &card->dev->dev_addr[0];
 389                         rc = qeth_l2_send_delmac(card, mac);
 390                         QETH_DBF_TEXT_(SETUP, 2, "Lerr%d", rc);
 391                 }
 392                 card->state = CARD_STATE_SOFTSETUP;
 393         }
 394         if (card->state == CARD_STATE_SOFTSETUP) {
 395                 qeth_l2_process_vlans(card, 1);
 396                 qeth_l2_del_all_mc(card);
 397                 qeth_clear_ipacmd_list(card);
 398                 card->state = CARD_STATE_HARDSETUP;
 399         }
 400         if (card->state == CARD_STATE_HARDSETUP) {
 401                 qeth_qdio_clear_card(card, 0);
 402                 qeth_clear_qdio_buffers(card);
 403                 qeth_clear_working_pool_list(card);
 404                 card->state = CARD_STATE_DOWN;
 405         }
 406         if (card->state == CARD_STATE_DOWN) {
 407                 qeth_clear_cmd_buffers(&card->read);
 408                 qeth_clear_cmd_buffers(&card->write);
 409         }
 410         card->use_hard_stop = 0;
 411         return rc;
 412 }
 413
 414 static void qeth_l2_process_inbound_buffer(struct qeth_card *card,
 415                             struct qeth_qdio_buffer *buf, int index)
 416 {
 417         struct qdio_buffer_element *element;
 418         struct sk_buff *skb;
 419         struct qeth_hdr *hdr;
 420         int offset;
 421         unsigned int len;
 422
 423         /* get first element of current buffer */
 424         element = (struct qdio_buffer_element *)&buf->buffer->element[0];
 425         offset = 0;
 426         if (card->options.performance_stats)
 427                 card->perf_stats.bufs_rec++;
 428         while ((skb = qeth_core_get_next_skb(card, buf->buffer, &element,
 429                                        &offset, &hdr))) {
 430                 skb->dev = card->dev;
 431                 /* is device UP ? */
 432                 if (!(card->dev->flags & IFF_UP)) {
 433                         dev_kfree_skb_any(skb);
 434                         continue;
 435                 }
 436
 437                 switch (hdr->hdr.l2.id) {
 438                 case QETH_HEADER_TYPE_LAYER2:
 439                         skb->pkt_type = PACKET_HOST;
 440                         skb->protocol = eth_type_trans(skb, skb->dev);
 441                         if (card->options.checksum_type == NO_CHECKSUMMING)
 442                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 443                         else
 444                                 skb->ip_summed = CHECKSUM_NONE;
 445                         if (skb->protocol == htons(ETH_P_802_2))
 446                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
 447                         len = skb->len;
 448                         netif_rx(skb);
 449                         break;
 450                 case QETH_HEADER_TYPE_OSN:
 451                         skb_push(skb, sizeof(struct qeth_hdr));
 452                         skb_copy_to_linear_data(skb, hdr,
 453                                                 sizeof(struct qeth_hdr));
 454                         len = skb->len;
 455                         card->osn_info.data_cb(skb);
 456                         break;
 457                 default:
 458                         dev_kfree_skb_any(skb);
 459                         QETH_DBF_TEXT(TRACE, 3, "inbunkno");
 460                         QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
 461                         continue;
 462                 }
 463                 card->dev->last_rx = jiffies;
 464                 card->stats.rx_packets++;
 465                 card->stats.rx_bytes += len;
 466         }
 467 }
 468
 469 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
 470                            enum qeth_ipa_cmds ipacmd,
 471                            int (*reply_cb) (struct qeth_card *,
 472                                             struct qeth_reply*,
 473                                             unsigned long))
 474 {
 475         struct qeth_ipa_cmd *cmd;
 476         struct qeth_cmd_buffer *iob;
 477
 478         QETH_DBF_TEXT(TRACE, 2, "L2sdmac");
 479         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 480         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 481         cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
 482         memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
 483         return qeth_send_ipa_cmd(card, iob, reply_cb, NULL);
 484 }
 485
 486 static int qeth_l2_send_setmac_cb(struct qeth_card *card,
 487                            struct qeth_reply *reply,
 488                            unsigned long data)
 489 {
 490         struct qeth_ipa_cmd *cmd;
 491
 492         QETH_DBF_TEXT(TRACE, 2, "L2Smaccb");
 493         cmd = (struct qeth_ipa_cmd *) data;
 494         if (cmd->hdr.return_code) {
 495                 QETH_DBF_TEXT_(TRACE, 2, "L2er%x", cmd->hdr.return_code);
 496                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 497                 cmd->hdr.return_code = -EIO;
 498         } else {
 499                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 500                 memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
 501                        OSA_ADDR_LEN);
 502                 PRINT_INFO("MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x "
 503                            "successfully registered on device %s\n",
 504                            card->dev->dev_addr[0], card->dev->dev_addr[1],
 505                            card->dev->dev_addr[2], card->dev->dev_addr[3],
 506                            card->dev->dev_addr[4], card->dev->dev_addr[5],
 507                            card->dev->name);
 508         }
 509         return 0;
 510 }
 511
 512 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
 513 {
 514         QETH_DBF_TEXT(TRACE, 2, "L2Setmac");
 515         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
 516                                           qeth_l2_send_setmac_cb);
 517 }
 518
 519 static int qeth_l2_send_delmac_cb(struct qeth_card *card,
 520                            struct qeth_reply *reply,
 521                            unsigned long data)
 522 {
 523         struct qeth_ipa_cmd *cmd;
 524
 525         QETH_DBF_TEXT(TRACE, 2, "L2Dmaccb");
 526         cmd = (struct qeth_ipa_cmd *) data;
 527         if (cmd->hdr.return_code) {
 528                 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
 529                 cmd->hdr.return_code = -EIO;
 530                 return 0;
 531         }
 532         card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 533
 534         return 0;
 535 }
 536
 537 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
 538 {
 539         QETH_DBF_TEXT(TRACE, 2, "L2Delmac");
 540         if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
 541                 return 0;
 542         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
 543                                           qeth_l2_send_delmac_cb);
 544 }
 545
 546 static int qeth_l2_request_initial_mac(struct qeth_card *card)
 547 {
 548         int rc = 0;
 549         char vendor_pre[] = {0x02, 0x00, 0x00};
 550
 551         QETH_DBF_TEXT(SETUP, 2, "doL2init");
 552         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
 553
 554         rc = qeth_query_setadapterparms(card);
 555         if (rc) {
 556                 PRINT_WARN("could not query adapter parameters on device %s: "
 557                            "x%x\n", CARD_BUS_ID(card), rc);
 558         }
 559
 560         if (card->info.guestlan) {
 561                 rc = qeth_setadpparms_change_macaddr(card);
 562                 if (rc) {
 563                         PRINT_WARN("couldn't get MAC address on "
 564                            "device %s: x%x\n",
 565                            CARD_BUS_ID(card), rc);
 566                         QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 567                         return rc;
 568                 }
 569                 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN);
 570         } else {
 571                 random_ether_addr(card->dev->dev_addr);
 572                 memcpy(card->dev->dev_addr, vendor_pre, 3);
 573         }
 574         return 0;
 575 }
 576
 577 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 578 {
 579         struct sockaddr *addr = p;
 580         struct qeth_card *card = netdev_priv(dev);
 581         int rc = 0;
 582
 583         QETH_DBF_TEXT(TRACE, 3, "setmac");
 584
 585         if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
 586                 QETH_DBF_TEXT(TRACE, 3, "setmcINV");
 587                 return -EOPNOTSUPP;
 588         }
 589
 590         if (card->info.type == QETH_CARD_TYPE_OSN) {
 591                 PRINT_WARN("Setting MAC address on %s is not supported.\n",
 592                            dev->name);
 593                 QETH_DBF_TEXT(TRACE, 3, "setmcOSN");
 594                 return -EOPNOTSUPP;
 595         }
 596         QETH_DBF_TEXT_(TRACE, 3, "%s", CARD_BUS_ID(card));
 597         QETH_DBF_HEX(TRACE, 3, addr->sa_data, OSA_ADDR_LEN);
 598         rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
 599         if (!rc)
 600                 rc = qeth_l2_send_setmac(card, addr->sa_data);
 601         return rc;
 602 }
 603
 604 static void qeth_l2_set_multicast_list(struct net_device *dev)
 605 {
 606         struct qeth_card *card = netdev_priv(dev);
 607         struct dev_mc_list *dm;
 608
 609         if (card->info.type == QETH_CARD_TYPE_OSN)
 610                 return ;
 611
 612         QETH_DBF_TEXT(TRACE, 3, "setmulti");
 613         qeth_l2_del_all_mc(card);
 614         spin_lock_bh(&card->mclock);
 615         for (dm = dev->mc_list; dm; dm = dm->next)
 616                 qeth_l2_add_mc(card, dm->dmi_addr);
 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 = netdev_priv(dev);
 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
 638         QETH_DBF_TEXT(TRACE, 6, "l2xmit");
 639
 640         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
 641                 card->stats.tx_carrier_errors++;
 642                 goto tx_drop;
 643         }
 644
 645         if ((card->info.type == QETH_CARD_TYPE_OSN) &&
 646             (skb->protocol == htons(ETH_P_IPV6)))
 647                 goto tx_drop;
 648
 649         if (card->options.performance_stats) {
 650                 card->perf_stats.outbound_cnt++;
 651                 card->perf_stats.outbound_start_time = qeth_get_micros();
 652         }
 653         netif_stop_queue(dev);
 654
 655         if (skb_is_gso(skb))
 656                 large_send = QETH_LARGE_SEND_EDDP;
 657
 658         if (card->info.type == QETH_CARD_TYPE_OSN)
 659                 hdr = (struct qeth_hdr *)skb->data;
 660         else {
 661                 new_skb = qeth_prepare_skb(card, skb, &hdr);
 662                 if (!new_skb)
 663                         goto tx_drop;
 664                 qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 665         }
 666
 667         if (large_send == QETH_LARGE_SEND_EDDP) {
 668                 ctx = qeth_eddp_create_context(card, new_skb, hdr,
 669                                                 skb->sk->sk_protocol);
 670                 if (ctx == NULL) {
 671                         PRINT_WARN("could not create eddp context\n");
 672                         goto tx_drop;
 673                 }
 674         } else {
 675                 elements = qeth_get_elements_no(card, (void *)hdr, new_skb, 0);
 676                 if (!elements)
 677                         goto tx_drop;
 678         }
 679
 680         if ((large_send == QETH_LARGE_SEND_NO) &&
 681             (skb->ip_summed == CHECKSUM_PARTIAL))
 682                 qeth_tx_csum(new_skb);
 683
 684         if (card->info.type != QETH_CARD_TYPE_IQD)
 685                 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
 686                                          elements, ctx);
 687         else
 688                 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
 689                                               elements, ctx);
 690         if (!rc) {
 691                 card->stats.tx_packets++;
 692                 card->stats.tx_bytes += tx_bytes;
 693                 if (new_skb != skb)
 694                         dev_kfree_skb_any(skb);
 695                 if (card->options.performance_stats) {
 696                         if (large_send != QETH_LARGE_SEND_NO) {
 697                                 card->perf_stats.large_send_bytes += tx_bytes;
 698                                 card->perf_stats.large_send_cnt++;
 699                         }
 700                         if (skb_shinfo(new_skb)->nr_frags > 0) {
 701                                 card->perf_stats.sg_skbs_sent++;
 702                                 /* nr_frags + skb->data */
 703                                 card->perf_stats.sg_frags_sent +=
 704                                         skb_shinfo(new_skb)->nr_frags + 1;
 705                         }
 706                 }
 707
 708                 if (ctx != NULL) {
 709                         qeth_eddp_put_context(ctx);
 710                         dev_kfree_skb_any(new_skb);
 711                 }
 712         } else {
 713                 if (ctx != NULL)
 714                         qeth_eddp_put_context(ctx);
 715
 716                 if (rc == -EBUSY) {
 717                         if (new_skb != skb)
 718                                 dev_kfree_skb_any(new_skb);
 719                         return NETDEV_TX_BUSY;
 720                 } else
 721                         goto tx_drop;
 722         }
 723
 724         netif_wake_queue(dev);
 725         if (card->options.performance_stats)
 726                 card->perf_stats.outbound_time += qeth_get_micros() -
 727                         card->perf_stats.outbound_start_time;
 728         return rc;
 729
 730 tx_drop:
 731         card->stats.tx_dropped++;
 732         card->stats.tx_errors++;
 733         if ((new_skb != skb) && new_skb)
 734                 dev_kfree_skb_any(new_skb);
 735         dev_kfree_skb_any(skb);
 736         return NETDEV_TX_OK;
 737 }
 738
 739 static void qeth_l2_qdio_input_handler(struct ccw_device *ccwdev,
 740                         unsigned int status, unsigned int qdio_err,
 741                         unsigned int siga_err, unsigned int queue,
 742                         int first_element, int count, unsigned long card_ptr)
 743 {
 744         struct net_device *net_dev;
 745         struct qeth_card *card;
 746         struct qeth_qdio_buffer *buffer;
 747         int index;
 748         int i;
 749
 750         QETH_DBF_TEXT(TRACE, 6, "qdinput");
 751         card = (struct qeth_card *) card_ptr;
 752         net_dev = card->dev;
 753         if (card->options.performance_stats) {
 754                 card->perf_stats.inbound_cnt++;
 755                 card->perf_stats.inbound_start_time = qeth_get_micros();
 756         }
 757         if (status & QDIO_STATUS_LOOK_FOR_ERROR) {
 758                 if (status & QDIO_STATUS_ACTIVATE_CHECK_CONDITION) {
 759                         QETH_DBF_TEXT(TRACE, 1, "qdinchk");
 760                         QETH_DBF_TEXT_(TRACE, 1, "%s", CARD_BUS_ID(card));
 761                         QETH_DBF_TEXT_(TRACE, 1, "%04X%04X", first_element,
 762                                         count);
 763                         QETH_DBF_TEXT_(TRACE, 1, "%04X%04X", queue, status);
 764                         qeth_schedule_recovery(card);
 765                         return;
 766                 }
 767         }
 768         for (i = first_element; i < (first_element + count); ++i) {
 769                 index = i % QDIO_MAX_BUFFERS_PER_Q;
 770                 buffer = &card->qdio.in_q->bufs[index];
 771                 if (!((status & QDIO_STATUS_LOOK_FOR_ERROR) &&
 772                       qeth_check_qdio_errors(buffer->buffer,
 773                                              qdio_err, siga_err, "qinerr")))
 774                         qeth_l2_process_inbound_buffer(card, buffer, index);
 775                 /* clear buffer and give back to hardware */
 776                 qeth_put_buffer_pool_entry(card, buffer->pool_entry);
 777                 qeth_queue_input_buffer(card, index);
 778         }
 779         if (card->options.performance_stats)
 780                 card->perf_stats.inbound_time += qeth_get_micros() -
 781                         card->perf_stats.inbound_start_time;
 782 }
 783
 784 static int qeth_l2_open(struct net_device *dev)
 785 {
 786         struct qeth_card *card = netdev_priv(dev);
 787
 788         QETH_DBF_TEXT(TRACE, 4, "qethopen");
 789         if (card->state != CARD_STATE_SOFTSETUP)
 790                 return -ENODEV;
 791
 792         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
 793              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
 794                 QETH_DBF_TEXT(TRACE, 4, "nomacadr");
 795                 return -EPERM;
 796         }
 797         card->data.state = CH_STATE_UP;
 798         card->state = CARD_STATE_UP;
 799         card->dev->flags |= IFF_UP;
 800         netif_start_queue(dev);
 801
 802         if (!card->lan_online && netif_carrier_ok(dev))
 803                 netif_carrier_off(dev);
 804         return 0;
 805 }
 806
 807
 808 static int qeth_l2_stop(struct net_device *dev)
 809 {
 810         struct qeth_card *card = netdev_priv(dev);
 811
 812         QETH_DBF_TEXT(TRACE, 4, "qethstop");
 813         netif_tx_disable(dev);
 814         card->dev->flags &= ~IFF_UP;
 815         if (card->state == CARD_STATE_UP)
 816                 card->state = CARD_STATE_SOFTSETUP;
 817         return 0;
 818 }
 819
 820 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 821 {
 822         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 823
 824         INIT_LIST_HEAD(&card->vid_list);
 825         INIT_LIST_HEAD(&card->mc_list);
 826         card->options.layer2 = 1;
 827         card->discipline.input_handler = (qdio_handler_t *)
 828                 qeth_l2_qdio_input_handler;
 829         card->discipline.output_handler = (qdio_handler_t *)
 830                 qeth_qdio_output_handler;
 831         card->discipline.recover = qeth_l2_recover;
 832         return 0;
 833 }
 834
 835 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
 836 {
 837         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
 838
 839         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 840
 841         if (cgdev->state == CCWGROUP_ONLINE) {
 842                 card->use_hard_stop = 1;
 843                 qeth_l2_set_offline(cgdev);
 844         }
 845
 846         if (card->dev) {
 847                 unregister_netdev(card->dev);
 848                 card->dev = NULL;
 849         }
 850
 851         qeth_l2_del_all_mc(card);
 852         return;
 853 }
 854
 855 static struct ethtool_ops qeth_l2_ethtool_ops = {
 856         .get_link = ethtool_op_get_link,
 857         .get_tx_csum = ethtool_op_get_tx_csum,
 858         .set_tx_csum = ethtool_op_set_tx_hw_csum,
 859         .get_sg = ethtool_op_get_sg,
 860         .set_sg = ethtool_op_set_sg,
 861         .get_tso = ethtool_op_get_tso,
 862         .set_tso = ethtool_op_set_tso,
 863         .get_strings = qeth_core_get_strings,
 864         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 865         .get_stats_count = qeth_core_get_stats_count,
 866         .get_drvinfo = qeth_core_get_drvinfo,
 867 };
 868
 869 static struct ethtool_ops qeth_l2_osn_ops = {
 870         .get_strings = qeth_core_get_strings,
 871         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 872         .get_stats_count = qeth_core_get_stats_count,
 873         .get_drvinfo = qeth_core_get_drvinfo,
 874 };
 875
 876 static int qeth_l2_setup_netdev(struct qeth_card *card)
 877 {
 878         switch (card->info.type) {
 879         case QETH_CARD_TYPE_OSAE:
 880                 card->dev = alloc_etherdev(0);
 881                 break;
 882         case QETH_CARD_TYPE_IQD:
 883                 card->dev = alloc_netdev(0, "hsi%d", ether_setup);
 884                 break;
 885         case QETH_CARD_TYPE_OSN:
 886                 card->dev = alloc_netdev(0, "osn%d", ether_setup);
 887                 card->dev->flags |= IFF_NOARP;
 888                 break;
 889         default:
 890                 card->dev = alloc_etherdev(0);
 891         }
 892
 893         if (!card->dev)
 894                 return -ENODEV;
 895
 896         card->dev->priv = card;
 897         card->dev->tx_timeout = &qeth_tx_timeout;
 898         card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
 899         card->dev->open = qeth_l2_open;
 900         card->dev->stop = qeth_l2_stop;
 901         card->dev->hard_start_xmit = qeth_l2_hard_start_xmit;
 902         card->dev->do_ioctl = qeth_l2_do_ioctl;
 903         card->dev->get_stats = qeth_get_stats;
 904         card->dev->change_mtu = qeth_change_mtu;
 905         card->dev->set_multicast_list = qeth_l2_set_multicast_list;
 906         card->dev->vlan_rx_kill_vid = qeth_l2_vlan_rx_kill_vid;
 907         card->dev->vlan_rx_add_vid = qeth_l2_vlan_rx_add_vid;
 908         card->dev->set_mac_address = qeth_l2_set_mac_address;
 909         card->dev->mtu = card->info.initial_mtu;
 910         if (card->info.type != QETH_CARD_TYPE_OSN)
 911                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops);
 912         else
 913                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops);
 914         card->dev->features |= NETIF_F_HW_VLAN_FILTER;
 915         card->info.broadcast_capable = 1;
 916         qeth_l2_request_initial_mac(card);
 917         SET_NETDEV_DEV(card->dev, &card->gdev->dev);
 918         return register_netdev(card->dev);
 919 }
 920
 921 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 922 {
 923         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 924         int rc = 0;
 925         enum qeth_card_states recover_flag;
 926
 927         BUG_ON(!card);
 928         QETH_DBF_TEXT(SETUP, 2, "setonlin");
 929         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 930
 931         qeth_set_allowed_threads(card, QETH_RECOVER_THREAD, 1);
 932         if (qeth_wait_for_threads(card, ~QETH_RECOVER_THREAD)) {
 933                 PRINT_WARN("set_online of card %s interrupted by user!\n",
 934                            CARD_BUS_ID(card));
 935                 return -ERESTARTSYS;
 936         }
 937
 938         recover_flag = card->state;
 939         rc = ccw_device_set_online(CARD_RDEV(card));
 940         if (rc) {
 941                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 942                 return -EIO;
 943         }
 944         rc = ccw_device_set_online(CARD_WDEV(card));
 945         if (rc) {
 946                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 947                 return -EIO;
 948         }
 949         rc = ccw_device_set_online(CARD_DDEV(card));
 950         if (rc) {
 951                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 952                 return -EIO;
 953         }
 954
 955         rc = qeth_core_hardsetup_card(card);
 956         if (rc) {
 957                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
 958                 goto out_remove;
 959         }
 960
 961         if (!card->dev && qeth_l2_setup_netdev(card))
 962                 goto out_remove;
 963
 964         if (card->info.type != QETH_CARD_TYPE_OSN)
 965                 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
 966
 967         card->state = CARD_STATE_HARDSETUP;
 968         qeth_print_status_message(card);
 969
 970         /* softsetup */
 971         QETH_DBF_TEXT(SETUP, 2, "softsetp");
 972
 973         rc = qeth_send_startlan(card);
 974         if (rc) {
 975                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 976                 if (rc == 0xe080) {
 977                         PRINT_WARN("LAN on card %s if offline! "
 978                                    "Waiting for STARTLAN from card.\n",
 979                                    CARD_BUS_ID(card));
 980                         card->lan_online = 0;
 981                 }
 982                 return rc;
 983         } else
 984                 card->lan_online = 1;
 985
 986         if (card->info.type != QETH_CARD_TYPE_OSN) {
 987                 qeth_set_large_send(card, card->options.large_send);
 988                 qeth_l2_process_vlans(card, 0);
 989         }
 990
 991         netif_tx_disable(card->dev);
 992
 993         rc = qeth_init_qdio_queues(card);
 994         if (rc) {
 995                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
 996                 goto out_remove;
 997         }
 998         card->state = CARD_STATE_SOFTSETUP;
 999         netif_carrier_on(card->dev);
1000
1001         qeth_set_allowed_threads(card, 0xffffffff, 0);
1002         if (recover_flag == CARD_STATE_RECOVER) {
1003                 if (recovery_mode &&
1004                     card->info.type != QETH_CARD_TYPE_OSN) {
1005                         qeth_l2_open(card->dev);
1006                 } else {
1007                         rtnl_lock();
1008                         dev_open(card->dev);
1009                         rtnl_unlock();
1010                 }
1011                 /* this also sets saved unicast addresses */
1012                 qeth_l2_set_multicast_list(card->dev);
1013         }
1014         /* let user_space know that device is online */
1015         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1016         return 0;
1017 out_remove:
1018         card->use_hard_stop = 1;
1019         qeth_l2_stop_card(card, 0);
1020         ccw_device_set_offline(CARD_DDEV(card));
1021         ccw_device_set_offline(CARD_WDEV(card));
1022         ccw_device_set_offline(CARD_RDEV(card));
1023         if (recover_flag == CARD_STATE_RECOVER)
1024                 card->state = CARD_STATE_RECOVER;
1025         else
1026                 card->state = CARD_STATE_DOWN;
1027         return -ENODEV;
1028 }
1029
1030 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1031 {
1032         return __qeth_l2_set_online(gdev, 0);
1033 }
1034
1035 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1036                                         int recovery_mode)
1037 {
1038         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1039         int rc = 0, rc2 = 0, rc3 = 0;
1040         enum qeth_card_states recover_flag;
1041
1042         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1043         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1044
1045         if (card->dev && netif_carrier_ok(card->dev))
1046                 netif_carrier_off(card->dev);
1047         recover_flag = card->state;
1048         if (qeth_l2_stop_card(card, recovery_mode) == -ERESTARTSYS) {
1049                 PRINT_WARN("Stopping card %s interrupted by user!\n",
1050                            CARD_BUS_ID(card));
1051                 return -ERESTARTSYS;
1052         }
1053         rc  = ccw_device_set_offline(CARD_DDEV(card));
1054         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1055         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1056         if (!rc)
1057                 rc = (rc2) ? rc2 : rc3;
1058         if (rc)
1059                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1060         if (recover_flag == CARD_STATE_UP)
1061                 card->state = CARD_STATE_RECOVER;
1062         /* let user_space know that device is offline */
1063         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1064         return 0;
1065 }
1066
1067 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1068 {
1069         return __qeth_l2_set_offline(cgdev, 0);
1070 }
1071
1072 static int qeth_l2_recover(void *ptr)
1073 {
1074         struct qeth_card *card;
1075         int rc = 0;
1076
1077         card = (struct qeth_card *) ptr;
1078         QETH_DBF_TEXT(TRACE, 2, "recover1");
1079         QETH_DBF_HEX(TRACE, 2, &card, sizeof(void *));
1080         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1081                 return 0;
1082         QETH_DBF_TEXT(TRACE, 2, "recover2");
1083         PRINT_WARN("Recovery of device %s started ...\n",
1084                    CARD_BUS_ID(card));
1085         card->use_hard_stop = 1;
1086         __qeth_l2_set_offline(card->gdev, 1);
1087         rc = __qeth_l2_set_online(card->gdev, 1);
1088         /* don't run another scheduled recovery */
1089         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1090         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1091         if (!rc)
1092                 PRINT_INFO("Device %s successfully recovered!\n",
1093                            CARD_BUS_ID(card));
1094         else
1095                 PRINT_INFO("Device %s could not be recovered!\n",
1096                            CARD_BUS_ID(card));
1097         return 0;
1098 }
1099
1100 static int __init qeth_l2_init(void)
1101 {
1102         PRINT_INFO("register layer 2 discipline\n");
1103         return 0;
1104 }
1105
1106 static void __exit qeth_l2_exit(void)
1107 {
1108         PRINT_INFO("unregister layer 2 discipline\n");
1109 }
1110
1111 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1112 {
1113         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1114         qeth_qdio_clear_card(card, 0);
1115         qeth_clear_qdio_buffers(card);
1116 }
1117
1118 struct ccwgroup_driver qeth_l2_ccwgroup_driver = {
1119         .probe = qeth_l2_probe_device,
1120         .remove = qeth_l2_remove_device,
1121         .set_online = qeth_l2_set_online,
1122         .set_offline = qeth_l2_set_offline,
1123         .shutdown = qeth_l2_shutdown,
1124 };
1125 EXPORT_SYMBOL_GPL(qeth_l2_ccwgroup_driver);
1126
1127 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1128                            struct qeth_cmd_buffer *iob)
1129 {
1130         unsigned long flags;
1131         int rc = 0;
1132
1133         QETH_DBF_TEXT(TRACE, 5, "osndctrd");
1134
1135         wait_event(card->wait_q,
1136                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1137         qeth_prepare_control_data(card, len, iob);
1138         QETH_DBF_TEXT(TRACE, 6, "osnoirqp");
1139         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1140         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1141                               (addr_t) iob, 0, 0);
1142         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1143         if (rc) {
1144                 PRINT_WARN("qeth_osn_send_control_data: "
1145                            "ccw_device_start rc = %i\n", rc);
1146                 QETH_DBF_TEXT_(TRACE, 2, " err%d", rc);
1147                 qeth_release_buffer(iob->channel, iob);
1148                 atomic_set(&card->write.irq_pending, 0);
1149                 wake_up(&card->wait_q);
1150         }
1151         return rc;
1152 }
1153
1154 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1155                         struct qeth_cmd_buffer *iob, int data_len)
1156 {
1157         u16 s1, s2;
1158
1159         QETH_DBF_TEXT(TRACE, 4, "osndipa");
1160
1161         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1162         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1163         s2 = (u16)data_len;
1164         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1165         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1166         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1167         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1168         return qeth_osn_send_control_data(card, s1, iob);
1169 }
1170
1171 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1172 {
1173         struct qeth_cmd_buffer *iob;
1174         struct qeth_card *card;
1175         int rc;
1176
1177         QETH_DBF_TEXT(TRACE, 2, "osnsdmc");
1178         if (!dev)
1179                 return -ENODEV;
1180         card = netdev_priv(dev);
1181         if (!card)
1182                 return -ENODEV;
1183         if ((card->state != CARD_STATE_UP) &&
1184             (card->state != CARD_STATE_SOFTSETUP))
1185                 return -ENODEV;
1186         iob = qeth_wait_for_buffer(&card->write);
1187         memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1188         rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1189         return rc;
1190 }
1191 EXPORT_SYMBOL(qeth_osn_assist);
1192
1193 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1194                   int (*assist_cb)(struct net_device *, void *),
1195                   int (*data_cb)(struct sk_buff *))
1196 {
1197         struct qeth_card *card;
1198
1199         QETH_DBF_TEXT(TRACE, 2, "osnreg");
1200         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1201         if (*dev == NULL)
1202                 return -ENODEV;
1203         card = netdev_priv(*dev);
1204         if (!card)
1205                 return -ENODEV;
1206         if ((assist_cb == NULL) || (data_cb == NULL))
1207                 return -EINVAL;
1208         card->osn_info.assist_cb = assist_cb;
1209         card->osn_info.data_cb = data_cb;
1210         return 0;
1211 }
1212 EXPORT_SYMBOL(qeth_osn_register);
1213
1214 void qeth_osn_deregister(struct net_device *dev)
1215 {
1216         struct qeth_card *card;
1217
1218         QETH_DBF_TEXT(TRACE, 2, "osndereg");
1219         if (!dev)
1220                 return;
1221         card = netdev_priv(dev);
1222         if (!card)
1223                 return;
1224         card->osn_info.assist_cb = NULL;
1225         card->osn_info.data_cb = NULL;
1226         return;
1227 }
1228 EXPORT_SYMBOL(qeth_osn_deregister);
1229
1230 module_init(qeth_l2_init);
1231 module_exit(qeth_l2_exit);
1232 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1233 MODULE_DESCRIPTION("qeth layer 2 discipline");
1234 MODULE_LICENSE("GPL");