git.oblomov.eu Git - linux-2.6/blob - drivers/s390/net/qeth_l2_main.c

   1 /*
   2  *  drivers/s390/net/qeth_l2_main.c
   3  *
   4  *    Copyright IBM Corp. 2007
   5  *    Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
   6  *               Frank Pavlic <fpavlic@de.ibm.com>,
   7  *               Thomas Spatzier <tspat@de.ibm.com>,
   8  *               Frank Blaschka <frank.blaschka@de.ibm.com>
   9  */
  10
  11 #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 <asm/s390_rdev.h>
  24
  25 #include "qeth_core.h"
  26 #include "qeth_core_offl.h"
  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 = dev->ml_priv;
  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         __u16 temp_dev_no;
 108         unsigned long flags;
 109         struct ccw_dev_id read_devid;
 110
 111         ndev = NULL;
 112         memcpy(&temp_dev_no, read_dev_no, 2);
 113         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
 114         list_for_each_entry(card, &qeth_core_card_list.list, list) {
 115                 ccw_device_get_id(CARD_RDEV(card), &read_devid);
 116                 if (read_devid.devno == temp_dev_no) {
 117                         ndev = card->dev;
 118                         break;
 119                 }
 120         }
 121         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
 122         return ndev;
 123 }
 124
 125 static int qeth_l2_send_setgroupmac_cb(struct qeth_card *card,
 126                                 struct qeth_reply *reply,
 127                                 unsigned long data)
 128 {
 129         struct qeth_ipa_cmd *cmd;
 130         __u8 *mac;
 131
 132         QETH_DBF_TEXT(TRACE, 2, "L2Sgmacb");
 133         cmd = (struct qeth_ipa_cmd *) data;
 134         mac = &cmd->data.setdelmac.mac[0];
 135         /* MAC already registered, needed in couple/uncouple case */
 136         if (cmd->hdr.return_code == 0x2005) {
 137                 QETH_DBF_MESSAGE(2, "Group MAC %02x:%02x:%02x:%02x:%02x:%02x "
 138                           "already existing on %s \n",
 139                           mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
 140                           QETH_CARD_IFNAME(card));
 141                 cmd->hdr.return_code = 0;
 142         }
 143         if (cmd->hdr.return_code)
 144                 QETH_DBF_MESSAGE(2, "Could not set group MAC "
 145                           "%02x:%02x:%02x:%02x:%02x:%02x on %s: %x\n",
 146                           mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
 147                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 148         return 0;
 149 }
 150
 151 static int qeth_l2_send_setgroupmac(struct qeth_card *card, __u8 *mac)
 152 {
 153         QETH_DBF_TEXT(TRACE, 2, "L2Sgmac");
 154         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETGMAC,
 155                                           qeth_l2_send_setgroupmac_cb);
 156 }
 157
 158 static int qeth_l2_send_delgroupmac_cb(struct qeth_card *card,
 159                                 struct qeth_reply *reply,
 160                                 unsigned long data)
 161 {
 162         struct qeth_ipa_cmd *cmd;
 163         __u8 *mac;
 164
 165         QETH_DBF_TEXT(TRACE, 2, "L2Dgmacb");
 166         cmd = (struct qeth_ipa_cmd *) data;
 167         mac = &cmd->data.setdelmac.mac[0];
 168         if (cmd->hdr.return_code)
 169                 QETH_DBF_MESSAGE(2, "Could not delete group MAC "
 170                           "%02x:%02x:%02x:%02x:%02x:%02x on %s: %x\n",
 171                           mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
 172                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 173         return 0;
 174 }
 175
 176 static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac)
 177 {
 178         QETH_DBF_TEXT(TRACE, 2, "L2Dgmac");
 179         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELGMAC,
 180                                           qeth_l2_send_delgroupmac_cb);
 181 }
 182
 183 static void qeth_l2_add_mc(struct qeth_card *card, __u8 *mac, int vmac)
 184 {
 185         struct qeth_mc_mac *mc;
 186         int rc;
 187
 188         mc = kmalloc(sizeof(struct qeth_mc_mac), GFP_ATOMIC);
 189
 190         if (!mc)
 191                 return;
 192
 193         memcpy(mc->mc_addr, mac, OSA_ADDR_LEN);
 194         mc->mc_addrlen = OSA_ADDR_LEN;
 195         mc->is_vmac = vmac;
 196
 197         if (vmac) {
 198                 rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
 199                                         NULL);
 200         } else {
 201                 rc = qeth_l2_send_setgroupmac(card, mac);
 202         }
 203
 204         if (!rc)
 205                 list_add_tail(&mc->list, &card->mc_list);
 206         else
 207                 kfree(mc);
 208 }
 209
 210 static void qeth_l2_del_all_mc(struct qeth_card *card)
 211 {
 212         struct qeth_mc_mac *mc, *tmp;
 213
 214         spin_lock_bh(&card->mclock);
 215         list_for_each_entry_safe(mc, tmp, &card->mc_list, list) {
 216                 if (mc->is_vmac)
 217                         qeth_l2_send_setdelmac(card, mc->mc_addr,
 218                                         IPA_CMD_DELVMAC, NULL);
 219                 else
 220                         qeth_l2_send_delgroupmac(card, mc->mc_addr);
 221                 list_del(&mc->list);
 222                 kfree(mc);
 223         }
 224         spin_unlock_bh(&card->mclock);
 225 }
 226
 227 static void qeth_l2_get_packet_type(struct qeth_card *card,
 228                         struct qeth_hdr *hdr, struct sk_buff *skb)
 229 {
 230         __u16 hdr_mac;
 231
 232         if (!memcmp(skb->data + QETH_HEADER_SIZE,
 233                     skb->dev->broadcast, 6)) {
 234                 /* broadcast? */
 235                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 236                 return;
 237         }
 238         hdr_mac = *((__u16 *)skb->data);
 239         /* tr multicast? */
 240         switch (card->info.link_type) {
 241         case QETH_LINK_TYPE_HSTR:
 242         case QETH_LINK_TYPE_LANE_TR:
 243                 if ((hdr_mac == QETH_TR_MAC_NC) ||
 244                     (hdr_mac == QETH_TR_MAC_C))
 245                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 246                 else
 247                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 248                 break;
 249                 /* eth or so multicast? */
 250         default:
 251                 if ((hdr_mac == QETH_ETH_MAC_V4) ||
 252                      (hdr_mac == QETH_ETH_MAC_V6))
 253                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 254                 else
 255                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 256         }
 257 }
 258
 259 static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
 260                         struct sk_buff *skb, int ipv, int cast_type)
 261 {
 262         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
 263
 264         memset(hdr, 0, sizeof(struct qeth_hdr));
 265         hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
 266
 267         /* set byte byte 3 to casting flags */
 268         if (cast_type == RTN_MULTICAST)
 269                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 270         else if (cast_type == RTN_BROADCAST)
 271                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 272         else
 273                 qeth_l2_get_packet_type(card, hdr, skb);
 274
 275         hdr->hdr.l2.pkt_length = skb->len-QETH_HEADER_SIZE;
 276         /* VSWITCH relies on the VLAN
 277          * information to be present in
 278          * the QDIO header */
 279         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
 280                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
 281                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
 282         }
 283 }
 284
 285 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
 286                         struct qeth_reply *reply, unsigned long data)
 287 {
 288         struct qeth_ipa_cmd *cmd;
 289
 290         QETH_DBF_TEXT(TRACE, 2, "L2sdvcb");
 291         cmd = (struct qeth_ipa_cmd *) data;
 292         if (cmd->hdr.return_code) {
 293                 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x. "
 294                           "Continuing\n", cmd->data.setdelvlan.vlan_id,
 295                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 296                 QETH_DBF_TEXT_(TRACE, 2, "L2VL%4x", cmd->hdr.command);
 297                 QETH_DBF_TEXT_(TRACE, 2, "L2%s", CARD_BUS_ID(card));
 298                 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
 299         }
 300         return 0;
 301 }
 302
 303 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
 304                                 enum qeth_ipa_cmds ipacmd)
 305 {
 306         struct qeth_ipa_cmd *cmd;
 307         struct qeth_cmd_buffer *iob;
 308
 309         QETH_DBF_TEXT_(TRACE, 4, "L2sdv%x", ipacmd);
 310         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 311         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 312         cmd->data.setdelvlan.vlan_id = i;
 313         return qeth_send_ipa_cmd(card, iob,
 314                                  qeth_l2_send_setdelvlan_cb, NULL);
 315 }
 316
 317 static void qeth_l2_process_vlans(struct qeth_card *card, int clear)
 318 {
 319         struct qeth_vlan_vid *id;
 320         QETH_DBF_TEXT(TRACE, 3, "L2prcvln");
 321         spin_lock_bh(&card->vlanlock);
 322         list_for_each_entry(id, &card->vid_list, list) {
 323                 if (clear)
 324                         qeth_l2_send_setdelvlan(card, id->vid,
 325                                 IPA_CMD_DELVLAN);
 326                 else
 327                         qeth_l2_send_setdelvlan(card, id->vid,
 328                                 IPA_CMD_SETVLAN);
 329         }
 330         spin_unlock_bh(&card->vlanlock);
 331 }
 332
 333 static void qeth_l2_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
 334 {
 335         struct qeth_card *card = dev->ml_priv;
 336         struct qeth_vlan_vid *id;
 337
 338         QETH_DBF_TEXT_(TRACE, 4, "aid:%d", vid);
 339         id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
 340         if (id) {
 341                 id->vid = vid;
 342                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
 343                 spin_lock_bh(&card->vlanlock);
 344                 list_add_tail(&id->list, &card->vid_list);
 345                 spin_unlock_bh(&card->vlanlock);
 346         }
 347 }
 348
 349 static void qeth_l2_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
 350 {
 351         struct qeth_vlan_vid *id, *tmpid = NULL;
 352         struct qeth_card *card = dev->ml_priv;
 353
 354         QETH_DBF_TEXT_(TRACE, 4, "kid:%d", vid);
 355         spin_lock_bh(&card->vlanlock);
 356         list_for_each_entry(id, &card->vid_list, list) {
 357                 if (id->vid == vid) {
 358                         list_del(&id->list);
 359                         tmpid = id;
 360                         break;
 361                 }
 362         }
 363         spin_unlock_bh(&card->vlanlock);
 364         if (tmpid) {
 365                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 366                 kfree(tmpid);
 367         }
 368         qeth_l2_set_multicast_list(card->dev);
 369 }
 370
 371 static int qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
 372 {
 373         int rc = 0;
 374
 375         QETH_DBF_TEXT(SETUP , 2, "stopcard");
 376         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 377
 378         qeth_set_allowed_threads(card, 0, 1);
 379         if (card->read.state == CH_STATE_UP &&
 380             card->write.state == CH_STATE_UP &&
 381             (card->state == CARD_STATE_UP)) {
 382                 if (recovery_mode &&
 383                     card->info.type != QETH_CARD_TYPE_OSN) {
 384                         qeth_l2_stop(card->dev);
 385                 } else {
 386                         rtnl_lock();
 387                         dev_close(card->dev);
 388                         rtnl_unlock();
 389                 }
 390                 if (!card->use_hard_stop) {
 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                         qeth_l2_del_all_mc(card);
 401                 qeth_clear_ipacmd_list(card);
 402                 card->state = CARD_STATE_HARDSETUP;
 403         }
 404         if (card->state == CARD_STATE_HARDSETUP) {
 405                 qeth_qdio_clear_card(card, 0);
 406                 qeth_clear_qdio_buffers(card);
 407                 qeth_clear_working_pool_list(card);
 408                 card->state = CARD_STATE_DOWN;
 409         }
 410         if (card->state == CARD_STATE_DOWN) {
 411                 qeth_clear_cmd_buffers(&card->read);
 412                 qeth_clear_cmd_buffers(&card->write);
 413         }
 414         card->use_hard_stop = 0;
 415         return rc;
 416 }
 417
 418 static void qeth_l2_process_inbound_buffer(struct qeth_card *card,
 419                             struct qeth_qdio_buffer *buf, int index)
 420 {
 421         struct qdio_buffer_element *element;
 422         struct sk_buff *skb;
 423         struct qeth_hdr *hdr;
 424         int offset;
 425         unsigned int len;
 426
 427         /* get first element of current buffer */
 428         element = (struct qdio_buffer_element *)&buf->buffer->element[0];
 429         offset = 0;
 430         if (card->options.performance_stats)
 431                 card->perf_stats.bufs_rec++;
 432         while ((skb = qeth_core_get_next_skb(card, buf->buffer, &element,
 433                                        &offset, &hdr))) {
 434                 skb->dev = card->dev;
 435                 /* is device UP ? */
 436                 if (!(card->dev->flags & IFF_UP)) {
 437                         dev_kfree_skb_any(skb);
 438                         continue;
 439                 }
 440
 441                 switch (hdr->hdr.l2.id) {
 442                 case QETH_HEADER_TYPE_LAYER2:
 443                         skb->pkt_type = PACKET_HOST;
 444                         skb->protocol = eth_type_trans(skb, skb->dev);
 445                         if (card->options.checksum_type == NO_CHECKSUMMING)
 446                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 447                         else
 448                                 skb->ip_summed = CHECKSUM_NONE;
 449                         if (skb->protocol == htons(ETH_P_802_2))
 450                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
 451                         len = skb->len;
 452                         netif_rx(skb);
 453                         break;
 454                 case QETH_HEADER_TYPE_OSN:
 455                         if (card->info.type == QETH_CARD_TYPE_OSN) {
 456                                 skb_push(skb, sizeof(struct qeth_hdr));
 457                                 skb_copy_to_linear_data(skb, hdr,
 458                                                 sizeof(struct qeth_hdr));
 459                                 len = skb->len;
 460                                 card->osn_info.data_cb(skb);
 461                                 break;
 462                         }
 463                         /* else unknown */
 464                 default:
 465                         dev_kfree_skb_any(skb);
 466                         QETH_DBF_TEXT(TRACE, 3, "inbunkno");
 467                         QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
 468                         continue;
 469                 }
 470                 card->dev->last_rx = jiffies;
 471                 card->stats.rx_packets++;
 472                 card->stats.rx_bytes += len;
 473         }
 474 }
 475
 476 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
 477                            enum qeth_ipa_cmds ipacmd,
 478                            int (*reply_cb) (struct qeth_card *,
 479                                             struct qeth_reply*,
 480                                             unsigned long))
 481 {
 482         struct qeth_ipa_cmd *cmd;
 483         struct qeth_cmd_buffer *iob;
 484
 485         QETH_DBF_TEXT(TRACE, 2, "L2sdmac");
 486         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 487         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 488         cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
 489         memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
 490         return qeth_send_ipa_cmd(card, iob, reply_cb, NULL);
 491 }
 492
 493 static int qeth_l2_send_setmac_cb(struct qeth_card *card,
 494                            struct qeth_reply *reply,
 495                            unsigned long data)
 496 {
 497         struct qeth_ipa_cmd *cmd;
 498
 499         QETH_DBF_TEXT(TRACE, 2, "L2Smaccb");
 500         cmd = (struct qeth_ipa_cmd *) data;
 501         if (cmd->hdr.return_code) {
 502                 QETH_DBF_TEXT_(TRACE, 2, "L2er%x", cmd->hdr.return_code);
 503                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 504                 cmd->hdr.return_code = -EIO;
 505         } else {
 506                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 507                 memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
 508                        OSA_ADDR_LEN);
 509                 dev_info(&card->gdev->dev,
 510                         "MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x "
 511                         "successfully registered on device %s\n",
 512                         card->dev->dev_addr[0], card->dev->dev_addr[1],
 513                         card->dev->dev_addr[2], card->dev->dev_addr[3],
 514                         card->dev->dev_addr[4], card->dev->dev_addr[5],
 515                         card->dev->name);
 516         }
 517         return 0;
 518 }
 519
 520 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
 521 {
 522         QETH_DBF_TEXT(TRACE, 2, "L2Setmac");
 523         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
 524                                           qeth_l2_send_setmac_cb);
 525 }
 526
 527 static int qeth_l2_send_delmac_cb(struct qeth_card *card,
 528                            struct qeth_reply *reply,
 529                            unsigned long data)
 530 {
 531         struct qeth_ipa_cmd *cmd;
 532
 533         QETH_DBF_TEXT(TRACE, 2, "L2Dmaccb");
 534         cmd = (struct qeth_ipa_cmd *) data;
 535         if (cmd->hdr.return_code) {
 536                 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
 537                 cmd->hdr.return_code = -EIO;
 538                 return 0;
 539         }
 540         card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 541
 542         return 0;
 543 }
 544
 545 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
 546 {
 547         QETH_DBF_TEXT(TRACE, 2, "L2Delmac");
 548         if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
 549                 return 0;
 550         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
 551                                           qeth_l2_send_delmac_cb);
 552 }
 553
 554 static int qeth_l2_request_initial_mac(struct qeth_card *card)
 555 {
 556         int rc = 0;
 557         char vendor_pre[] = {0x02, 0x00, 0x00};
 558
 559         QETH_DBF_TEXT(SETUP, 2, "doL2init");
 560         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
 561
 562         rc = qeth_query_setadapterparms(card);
 563         if (rc) {
 564                 QETH_DBF_MESSAGE(2, "could not query adapter parameters on "
 565                         "device %s: x%x\n", CARD_BUS_ID(card), rc);
 566         }
 567
 568         if ((card->info.type == QETH_CARD_TYPE_IQD) ||
 569             (card->info.guestlan)) {
 570                 rc = qeth_setadpparms_change_macaddr(card);
 571                 if (rc) {
 572                         QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
 573                                 "device %s: x%x\n", CARD_BUS_ID(card), rc);
 574                         QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 575                         return rc;
 576                 }
 577                 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN);
 578         } else {
 579                 random_ether_addr(card->dev->dev_addr);
 580                 memcpy(card->dev->dev_addr, vendor_pre, 3);
 581         }
 582         return 0;
 583 }
 584
 585 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 586 {
 587         struct sockaddr *addr = p;
 588         struct qeth_card *card = dev->ml_priv;
 589         int rc = 0;
 590
 591         QETH_DBF_TEXT(TRACE, 3, "setmac");
 592
 593         if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
 594                 QETH_DBF_TEXT(TRACE, 3, "setmcINV");
 595                 return -EOPNOTSUPP;
 596         }
 597
 598         if (card->info.type == QETH_CARD_TYPE_OSN) {
 599                 QETH_DBF_TEXT(TRACE, 3, "setmcOSN");
 600                 return -EOPNOTSUPP;
 601         }
 602         QETH_DBF_TEXT_(TRACE, 3, "%s", CARD_BUS_ID(card));
 603         QETH_DBF_HEX(TRACE, 3, addr->sa_data, OSA_ADDR_LEN);
 604         rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
 605         if (!rc)
 606                 rc = qeth_l2_send_setmac(card, addr->sa_data);
 607         return rc;
 608 }
 609
 610 static void qeth_l2_set_multicast_list(struct net_device *dev)
 611 {
 612         struct qeth_card *card = dev->ml_priv;
 613         struct dev_addr_list *dm;
 614
 615         if (card->info.type == QETH_CARD_TYPE_OSN)
 616                 return ;
 617
 618         QETH_DBF_TEXT(TRACE, 3, "setmulti");
 619         qeth_l2_del_all_mc(card);
 620         spin_lock_bh(&card->mclock);
 621         for (dm = dev->mc_list; dm; dm = dm->next)
 622                 qeth_l2_add_mc(card, dm->da_addr, 0);
 623
 624         for (dm = dev->uc_list; dm; dm = dm->next)
 625                 qeth_l2_add_mc(card, dm->da_addr, 1);
 626
 627         spin_unlock_bh(&card->mclock);
 628         if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
 629                 return;
 630         qeth_setadp_promisc_mode(card);
 631 }
 632
 633 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 634 {
 635         int rc;
 636         struct qeth_hdr *hdr = NULL;
 637         int elements = 0;
 638         struct qeth_card *card = dev->ml_priv;
 639         struct sk_buff *new_skb = skb;
 640         int ipv = qeth_get_ip_version(skb);
 641         int cast_type = qeth_get_cast_type(card, skb);
 642         struct qeth_qdio_out_q *queue = card->qdio.out_qs
 643                 [qeth_get_priority_queue(card, skb, ipv, cast_type)];
 644         int tx_bytes = skb->len;
 645         enum qeth_large_send_types large_send = QETH_LARGE_SEND_NO;
 646         struct qeth_eddp_context *ctx = NULL;
 647         int data_offset = -1;
 648         int elements_needed = 0;
 649         int hd_len = 0;
 650
 651         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
 652                 card->stats.tx_carrier_errors++;
 653                 goto tx_drop;
 654         }
 655
 656         if ((card->info.type == QETH_CARD_TYPE_OSN) &&
 657             (skb->protocol == htons(ETH_P_IPV6)))
 658                 goto tx_drop;
 659
 660         if (card->options.performance_stats) {
 661                 card->perf_stats.outbound_cnt++;
 662                 card->perf_stats.outbound_start_time = qeth_get_micros();
 663         }
 664         netif_stop_queue(dev);
 665
 666         if (skb_is_gso(skb))
 667                 large_send = QETH_LARGE_SEND_EDDP;
 668
 669         if (card->info.type == QETH_CARD_TYPE_OSN)
 670                 hdr = (struct qeth_hdr *)skb->data;
 671         else {
 672                 if ((card->info.type == QETH_CARD_TYPE_IQD) && (!large_send) &&
 673                     (skb_shinfo(skb)->nr_frags == 0)) {
 674                         new_skb = skb;
 675                         data_offset = ETH_HLEN;
 676                         hd_len = ETH_HLEN;
 677                         hdr = kmem_cache_alloc(qeth_core_header_cache,
 678                                                 GFP_ATOMIC);
 679                         if (!hdr)
 680                                 goto tx_drop;
 681                         elements_needed++;
 682                         skb_reset_mac_header(new_skb);
 683                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 684                         hdr->hdr.l2.pkt_length = new_skb->len;
 685                         memcpy(((char *)hdr) + sizeof(struct qeth_hdr),
 686                                 skb_mac_header(new_skb), ETH_HLEN);
 687                 } else {
 688                         /* create a clone with writeable headroom */
 689                         new_skb = skb_realloc_headroom(skb,
 690                                                 sizeof(struct qeth_hdr));
 691                         if (!new_skb)
 692                                 goto tx_drop;
 693                         hdr = (struct qeth_hdr *)skb_push(new_skb,
 694                                                 sizeof(struct qeth_hdr));
 695                         skb_set_mac_header(new_skb, sizeof(struct qeth_hdr));
 696                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 697                 }
 698         }
 699
 700         if (large_send == QETH_LARGE_SEND_EDDP) {
 701                 ctx = qeth_eddp_create_context(card, new_skb, hdr,
 702                                                 skb->sk->sk_protocol);
 703                 if (ctx == NULL) {
 704                         QETH_DBF_MESSAGE(2, "could not create eddp context\n");
 705                         goto tx_drop;
 706                 }
 707         } else {
 708                 elements = qeth_get_elements_no(card, (void *)hdr, new_skb,
 709                                                 elements_needed);
 710                 if (!elements) {
 711                         if (data_offset >= 0)
 712                                 kmem_cache_free(qeth_core_header_cache, hdr);
 713                         goto tx_drop;
 714                 }
 715         }
 716
 717         if ((large_send == QETH_LARGE_SEND_NO) &&
 718             (skb->ip_summed == CHECKSUM_PARTIAL))
 719                 qeth_tx_csum(new_skb);
 720
 721         if (card->info.type != QETH_CARD_TYPE_IQD)
 722                 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
 723                                          elements, ctx);
 724         else
 725                 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
 726                                         elements, ctx, data_offset, hd_len);
 727         if (!rc) {
 728                 card->stats.tx_packets++;
 729                 card->stats.tx_bytes += tx_bytes;
 730                 if (new_skb != skb)
 731                         dev_kfree_skb_any(skb);
 732                 if (card->options.performance_stats) {
 733                         if (large_send != QETH_LARGE_SEND_NO) {
 734                                 card->perf_stats.large_send_bytes += tx_bytes;
 735                                 card->perf_stats.large_send_cnt++;
 736                         }
 737                         if (skb_shinfo(new_skb)->nr_frags > 0) {
 738                                 card->perf_stats.sg_skbs_sent++;
 739                                 /* nr_frags + skb->data */
 740                                 card->perf_stats.sg_frags_sent +=
 741                                         skb_shinfo(new_skb)->nr_frags + 1;
 742                         }
 743                 }
 744
 745                 if (ctx != NULL) {
 746                         qeth_eddp_put_context(ctx);
 747                         dev_kfree_skb_any(new_skb);
 748                 }
 749         } else {
 750                 if (ctx != NULL)
 751                         qeth_eddp_put_context(ctx);
 752
 753                 if (data_offset >= 0)
 754                         kmem_cache_free(qeth_core_header_cache, hdr);
 755
 756                 if (rc == -EBUSY) {
 757                         if (new_skb != skb)
 758                                 dev_kfree_skb_any(new_skb);
 759                         return NETDEV_TX_BUSY;
 760                 } else
 761                         goto tx_drop;
 762         }
 763
 764         netif_wake_queue(dev);
 765         if (card->options.performance_stats)
 766                 card->perf_stats.outbound_time += qeth_get_micros() -
 767                         card->perf_stats.outbound_start_time;
 768         return rc;
 769
 770 tx_drop:
 771         card->stats.tx_dropped++;
 772         card->stats.tx_errors++;
 773         if ((new_skb != skb) && new_skb)
 774                 dev_kfree_skb_any(new_skb);
 775         dev_kfree_skb_any(skb);
 776         netif_wake_queue(dev);
 777         return NETDEV_TX_OK;
 778 }
 779
 780 static void qeth_l2_qdio_input_handler(struct ccw_device *ccwdev,
 781                         unsigned int qdio_err, unsigned int queue,
 782                         int first_element, int count, unsigned long card_ptr)
 783 {
 784         struct net_device *net_dev;
 785         struct qeth_card *card;
 786         struct qeth_qdio_buffer *buffer;
 787         int index;
 788         int i;
 789
 790         card = (struct qeth_card *) card_ptr;
 791         net_dev = card->dev;
 792         if (card->options.performance_stats) {
 793                 card->perf_stats.inbound_cnt++;
 794                 card->perf_stats.inbound_start_time = qeth_get_micros();
 795         }
 796         if (qdio_err & QDIO_ERROR_ACTIVATE_CHECK_CONDITION) {
 797                 QETH_DBF_TEXT(TRACE, 1, "qdinchk");
 798                 QETH_DBF_TEXT_(TRACE, 1, "%s", CARD_BUS_ID(card));
 799                 QETH_DBF_TEXT_(TRACE, 1, "%04X%04X", first_element,
 800                                 count);
 801                 QETH_DBF_TEXT_(TRACE, 1, "%04X", queue);
 802                 qeth_schedule_recovery(card);
 803                 return;
 804         }
 805         for (i = first_element; i < (first_element + count); ++i) {
 806                 index = i % QDIO_MAX_BUFFERS_PER_Q;
 807                 buffer = &card->qdio.in_q->bufs[index];
 808                 if (!(qdio_err &&
 809                       qeth_check_qdio_errors(buffer->buffer, qdio_err, "qinerr")))
 810                         qeth_l2_process_inbound_buffer(card, buffer, index);
 811                 /* clear buffer and give back to hardware */
 812                 qeth_put_buffer_pool_entry(card, buffer->pool_entry);
 813                 qeth_queue_input_buffer(card, index);
 814         }
 815         if (card->options.performance_stats)
 816                 card->perf_stats.inbound_time += qeth_get_micros() -
 817                         card->perf_stats.inbound_start_time;
 818 }
 819
 820 static int qeth_l2_open(struct net_device *dev)
 821 {
 822         struct qeth_card *card = dev->ml_priv;
 823
 824         QETH_DBF_TEXT(TRACE, 4, "qethopen");
 825         if (card->state != CARD_STATE_SOFTSETUP)
 826                 return -ENODEV;
 827
 828         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
 829              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
 830                 QETH_DBF_TEXT(TRACE, 4, "nomacadr");
 831                 return -EPERM;
 832         }
 833         card->data.state = CH_STATE_UP;
 834         card->state = CARD_STATE_UP;
 835         netif_start_queue(dev);
 836
 837         if (!card->lan_online && netif_carrier_ok(dev))
 838                 netif_carrier_off(dev);
 839         return 0;
 840 }
 841
 842
 843 static int qeth_l2_stop(struct net_device *dev)
 844 {
 845         struct qeth_card *card = dev->ml_priv;
 846
 847         QETH_DBF_TEXT(TRACE, 4, "qethstop");
 848         netif_tx_disable(dev);
 849         if (card->state == CARD_STATE_UP)
 850                 card->state = CARD_STATE_SOFTSETUP;
 851         return 0;
 852 }
 853
 854 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 855 {
 856         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 857
 858         INIT_LIST_HEAD(&card->vid_list);
 859         INIT_LIST_HEAD(&card->mc_list);
 860         card->options.layer2 = 1;
 861         card->discipline.input_handler = (qdio_handler_t *)
 862                 qeth_l2_qdio_input_handler;
 863         card->discipline.output_handler = (qdio_handler_t *)
 864                 qeth_qdio_output_handler;
 865         card->discipline.recover = qeth_l2_recover;
 866         return 0;
 867 }
 868
 869 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
 870 {
 871         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
 872
 873         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 874
 875         if (cgdev->state == CCWGROUP_ONLINE) {
 876                 card->use_hard_stop = 1;
 877                 qeth_l2_set_offline(cgdev);
 878         }
 879
 880         if (card->dev) {
 881                 unregister_netdev(card->dev);
 882                 card->dev = NULL;
 883         }
 884
 885         qeth_l2_del_all_mc(card);
 886         return;
 887 }
 888
 889 static int qeth_l2_ethtool_set_tso(struct net_device *dev, u32 data)
 890 {
 891         struct qeth_card *card = dev->ml_priv;
 892
 893         if (data) {
 894                 if (card->options.large_send == QETH_LARGE_SEND_NO) {
 895                         card->options.large_send = QETH_LARGE_SEND_EDDP;
 896                         dev->features |= NETIF_F_TSO;
 897                 }
 898         } else {
 899                 dev->features &= ~NETIF_F_TSO;
 900                 card->options.large_send = QETH_LARGE_SEND_NO;
 901         }
 902         return 0;
 903 }
 904
 905 static struct ethtool_ops qeth_l2_ethtool_ops = {
 906         .get_link = ethtool_op_get_link,
 907         .get_tx_csum = ethtool_op_get_tx_csum,
 908         .set_tx_csum = ethtool_op_set_tx_hw_csum,
 909         .get_sg = ethtool_op_get_sg,
 910         .set_sg = ethtool_op_set_sg,
 911         .get_tso = ethtool_op_get_tso,
 912         .set_tso = qeth_l2_ethtool_set_tso,
 913         .get_strings = qeth_core_get_strings,
 914         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 915         .get_stats_count = qeth_core_get_stats_count,
 916         .get_drvinfo = qeth_core_get_drvinfo,
 917         .get_settings = qeth_core_ethtool_get_settings,
 918 };
 919
 920 static struct ethtool_ops qeth_l2_osn_ops = {
 921         .get_strings = qeth_core_get_strings,
 922         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 923         .get_stats_count = qeth_core_get_stats_count,
 924         .get_drvinfo = qeth_core_get_drvinfo,
 925 };
 926
 927 static int qeth_l2_setup_netdev(struct qeth_card *card)
 928 {
 929         switch (card->info.type) {
 930         case QETH_CARD_TYPE_OSAE:
 931                 card->dev = alloc_etherdev(0);
 932                 break;
 933         case QETH_CARD_TYPE_IQD:
 934                 card->dev = alloc_netdev(0, "hsi%d", ether_setup);
 935                 break;
 936         case QETH_CARD_TYPE_OSN:
 937                 card->dev = alloc_netdev(0, "osn%d", ether_setup);
 938                 card->dev->flags |= IFF_NOARP;
 939                 break;
 940         default:
 941                 card->dev = alloc_etherdev(0);
 942         }
 943
 944         if (!card->dev)
 945                 return -ENODEV;
 946
 947         card->dev->ml_priv = card;
 948         card->dev->tx_timeout = &qeth_tx_timeout;
 949         card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
 950         card->dev->open = qeth_l2_open;
 951         card->dev->stop = qeth_l2_stop;
 952         card->dev->hard_start_xmit = qeth_l2_hard_start_xmit;
 953         card->dev->do_ioctl = qeth_l2_do_ioctl;
 954         card->dev->get_stats = qeth_get_stats;
 955         card->dev->change_mtu = qeth_change_mtu;
 956         card->dev->set_multicast_list = qeth_l2_set_multicast_list;
 957         card->dev->vlan_rx_kill_vid = qeth_l2_vlan_rx_kill_vid;
 958         card->dev->vlan_rx_add_vid = qeth_l2_vlan_rx_add_vid;
 959         card->dev->set_mac_address = qeth_l2_set_mac_address;
 960         card->dev->mtu = card->info.initial_mtu;
 961         if (card->info.type != QETH_CARD_TYPE_OSN)
 962                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops);
 963         else
 964                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops);
 965         card->dev->features |= NETIF_F_HW_VLAN_FILTER;
 966         card->info.broadcast_capable = 1;
 967         qeth_l2_request_initial_mac(card);
 968         SET_NETDEV_DEV(card->dev, &card->gdev->dev);
 969         return register_netdev(card->dev);
 970 }
 971
 972 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 973 {
 974         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 975         int rc = 0;
 976         enum qeth_card_states recover_flag;
 977
 978         BUG_ON(!card);
 979         QETH_DBF_TEXT(SETUP, 2, "setonlin");
 980         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 981
 982         qeth_set_allowed_threads(card, QETH_RECOVER_THREAD, 1);
 983         recover_flag = card->state;
 984         rc = ccw_device_set_online(CARD_RDEV(card));
 985         if (rc) {
 986                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 987                 return -EIO;
 988         }
 989         rc = ccw_device_set_online(CARD_WDEV(card));
 990         if (rc) {
 991                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 992                 return -EIO;
 993         }
 994         rc = ccw_device_set_online(CARD_DDEV(card));
 995         if (rc) {
 996                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 997                 return -EIO;
 998         }
 999
1000         rc = qeth_core_hardsetup_card(card);
1001         if (rc) {
1002                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
1003                 goto out_remove;
1004         }
1005
1006         if (!card->dev && qeth_l2_setup_netdev(card))
1007                 goto out_remove;
1008
1009         if (card->info.type != QETH_CARD_TYPE_OSN)
1010                 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
1011
1012         card->state = CARD_STATE_HARDSETUP;
1013         qeth_print_status_message(card);
1014
1015         /* softsetup */
1016         QETH_DBF_TEXT(SETUP, 2, "softsetp");
1017
1018         rc = qeth_send_startlan(card);
1019         if (rc) {
1020                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1021                 if (rc == 0xe080) {
1022                         dev_warn(&card->gdev->dev,
1023                                 "The LAN is offline\n");
1024                         card->lan_online = 0;
1025                 }
1026                 return rc;
1027         } else
1028                 card->lan_online = 1;
1029
1030         if (card->info.type != QETH_CARD_TYPE_OSN) {
1031                 qeth_set_large_send(card, card->options.large_send);
1032                 qeth_l2_process_vlans(card, 0);
1033         }
1034
1035         netif_tx_disable(card->dev);
1036
1037         rc = qeth_init_qdio_queues(card);
1038         if (rc) {
1039                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1040                 goto out_remove;
1041         }
1042         card->state = CARD_STATE_SOFTSETUP;
1043         netif_carrier_on(card->dev);
1044
1045         qeth_set_allowed_threads(card, 0xffffffff, 0);
1046         if (recover_flag == CARD_STATE_RECOVER) {
1047                 if (recovery_mode &&
1048                     card->info.type != QETH_CARD_TYPE_OSN) {
1049                         qeth_l2_open(card->dev);
1050                 } else {
1051                         rtnl_lock();
1052                         dev_open(card->dev);
1053                         rtnl_unlock();
1054                 }
1055                 /* this also sets saved unicast addresses */
1056                 qeth_l2_set_multicast_list(card->dev);
1057         }
1058         /* let user_space know that device is online */
1059         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1060         return 0;
1061 out_remove:
1062         card->use_hard_stop = 1;
1063         qeth_l2_stop_card(card, 0);
1064         ccw_device_set_offline(CARD_DDEV(card));
1065         ccw_device_set_offline(CARD_WDEV(card));
1066         ccw_device_set_offline(CARD_RDEV(card));
1067         if (recover_flag == CARD_STATE_RECOVER)
1068                 card->state = CARD_STATE_RECOVER;
1069         else
1070                 card->state = CARD_STATE_DOWN;
1071         return -ENODEV;
1072 }
1073
1074 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1075 {
1076         return __qeth_l2_set_online(gdev, 0);
1077 }
1078
1079 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1080                                         int recovery_mode)
1081 {
1082         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1083         int rc = 0, rc2 = 0, rc3 = 0;
1084         enum qeth_card_states recover_flag;
1085
1086         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1087         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1088
1089         if (card->dev && netif_carrier_ok(card->dev))
1090                 netif_carrier_off(card->dev);
1091         recover_flag = card->state;
1092         qeth_l2_stop_card(card, recovery_mode);
1093         rc  = ccw_device_set_offline(CARD_DDEV(card));
1094         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1095         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1096         if (!rc)
1097                 rc = (rc2) ? rc2 : rc3;
1098         if (rc)
1099                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1100         if (recover_flag == CARD_STATE_UP)
1101                 card->state = CARD_STATE_RECOVER;
1102         /* let user_space know that device is offline */
1103         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1104         return 0;
1105 }
1106
1107 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1108 {
1109         return __qeth_l2_set_offline(cgdev, 0);
1110 }
1111
1112 static int qeth_l2_recover(void *ptr)
1113 {
1114         struct qeth_card *card;
1115         int rc = 0;
1116
1117         card = (struct qeth_card *) ptr;
1118         QETH_DBF_TEXT(TRACE, 2, "recover1");
1119         QETH_DBF_HEX(TRACE, 2, &card, sizeof(void *));
1120         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1121                 return 0;
1122         QETH_DBF_TEXT(TRACE, 2, "recover2");
1123         dev_warn(&card->gdev->dev,
1124                 "A recovery process has been started for the device\n");
1125         card->use_hard_stop = 1;
1126         __qeth_l2_set_offline(card->gdev, 1);
1127         rc = __qeth_l2_set_online(card->gdev, 1);
1128         /* don't run another scheduled recovery */
1129         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1130         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1131         if (!rc)
1132                 dev_info(&card->gdev->dev,
1133                         "Device successfully recovered!\n");
1134         else {
1135                 rtnl_lock();
1136                 dev_close(card->dev);
1137                 rtnl_unlock();
1138                 dev_warn(&card->gdev->dev, "The qeth device driver "
1139                         "failed to recover an error on the device\n");
1140         }
1141         return 0;
1142 }
1143
1144 static int __init qeth_l2_init(void)
1145 {
1146         pr_info("register layer 2 discipline\n");
1147         return 0;
1148 }
1149
1150 static void __exit qeth_l2_exit(void)
1151 {
1152         pr_info("unregister layer 2 discipline\n");
1153 }
1154
1155 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1156 {
1157         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1158         qeth_qdio_clear_card(card, 0);
1159         qeth_clear_qdio_buffers(card);
1160 }
1161
1162 struct ccwgroup_driver qeth_l2_ccwgroup_driver = {
1163         .probe = qeth_l2_probe_device,
1164         .remove = qeth_l2_remove_device,
1165         .set_online = qeth_l2_set_online,
1166         .set_offline = qeth_l2_set_offline,
1167         .shutdown = qeth_l2_shutdown,
1168 };
1169 EXPORT_SYMBOL_GPL(qeth_l2_ccwgroup_driver);
1170
1171 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1172                            struct qeth_cmd_buffer *iob)
1173 {
1174         unsigned long flags;
1175         int rc = 0;
1176
1177         QETH_DBF_TEXT(TRACE, 5, "osndctrd");
1178
1179         wait_event(card->wait_q,
1180                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1181         qeth_prepare_control_data(card, len, iob);
1182         QETH_DBF_TEXT(TRACE, 6, "osnoirqp");
1183         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1184         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1185                               (addr_t) iob, 0, 0);
1186         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1187         if (rc) {
1188                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1189                            "ccw_device_start rc = %i\n", rc);
1190                 QETH_DBF_TEXT_(TRACE, 2, " err%d", rc);
1191                 qeth_release_buffer(iob->channel, iob);
1192                 atomic_set(&card->write.irq_pending, 0);
1193                 wake_up(&card->wait_q);
1194         }
1195         return rc;
1196 }
1197
1198 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1199                         struct qeth_cmd_buffer *iob, int data_len)
1200 {
1201         u16 s1, s2;
1202
1203         QETH_DBF_TEXT(TRACE, 4, "osndipa");
1204
1205         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1206         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1207         s2 = (u16)data_len;
1208         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1209         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1210         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1211         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1212         return qeth_osn_send_control_data(card, s1, iob);
1213 }
1214
1215 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1216 {
1217         struct qeth_cmd_buffer *iob;
1218         struct qeth_card *card;
1219         int rc;
1220
1221         QETH_DBF_TEXT(TRACE, 2, "osnsdmc");
1222         if (!dev)
1223                 return -ENODEV;
1224         card = dev->ml_priv;
1225         if (!card)
1226                 return -ENODEV;
1227         if ((card->state != CARD_STATE_UP) &&
1228             (card->state != CARD_STATE_SOFTSETUP))
1229                 return -ENODEV;
1230         iob = qeth_wait_for_buffer(&card->write);
1231         memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1232         rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1233         return rc;
1234 }
1235 EXPORT_SYMBOL(qeth_osn_assist);
1236
1237 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1238                   int (*assist_cb)(struct net_device *, void *),
1239                   int (*data_cb)(struct sk_buff *))
1240 {
1241         struct qeth_card *card;
1242
1243         QETH_DBF_TEXT(TRACE, 2, "osnreg");
1244         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1245         if (*dev == NULL)
1246                 return -ENODEV;
1247         card = (*dev)->ml_priv;
1248         if (!card)
1249                 return -ENODEV;
1250         if ((assist_cb == NULL) || (data_cb == NULL))
1251                 return -EINVAL;
1252         card->osn_info.assist_cb = assist_cb;
1253         card->osn_info.data_cb = data_cb;
1254         return 0;
1255 }
1256 EXPORT_SYMBOL(qeth_osn_register);
1257
1258 void qeth_osn_deregister(struct net_device *dev)
1259 {
1260         struct qeth_card *card;
1261
1262         QETH_DBF_TEXT(TRACE, 2, "osndereg");
1263         if (!dev)
1264                 return;
1265         card = dev->ml_priv;
1266         if (!card)
1267                 return;
1268         card->osn_info.assist_cb = NULL;
1269         card->osn_info.data_cb = NULL;
1270         return;
1271 }
1272 EXPORT_SYMBOL(qeth_osn_deregister);
1273
1274 module_init(qeth_l2_init);
1275 module_exit(qeth_l2_exit);
1276 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1277 MODULE_DESCRIPTION("qeth layer 2 discipline");
1278 MODULE_LICENSE("GPL");