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   1 /*
   2  *  drivers/s390/net/qeth_l2_main.c
   3  *
   4  *    Copyright IBM Corp. 2007, 2009
   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/slab.h>
  20 #include <linux/etherdevice.h>
  21 #include <linux/mii.h>
  22 #include <linux/ip.h>
  23 #include <linux/list.h>
  24
  25 #include "qeth_core.h"
  26
  27 static int qeth_l2_set_offline(struct ccwgroup_device *);
  28 static int qeth_l2_stop(struct net_device *);
  29 static int qeth_l2_send_delmac(struct qeth_card *, __u8 *);
  30 static int qeth_l2_send_setdelmac(struct qeth_card *, __u8 *,
  31                            enum qeth_ipa_cmds,
  32                            int (*reply_cb) (struct qeth_card *,
  33                                             struct qeth_reply*,
  34                                             unsigned long));
  35 static void qeth_l2_set_multicast_list(struct net_device *);
  36 static int qeth_l2_recover(void *);
  37
  38 static int qeth_l2_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
  39 {
  40         struct qeth_card *card = dev->ml_priv;
  41         struct mii_ioctl_data *mii_data;
  42         int rc = 0;
  43
  44         if (!card)
  45                 return -ENODEV;
  46
  47         if ((card->state != CARD_STATE_UP) &&
  48                 (card->state != CARD_STATE_SOFTSETUP))
  49                 return -ENODEV;
  50
  51         if (card->info.type == QETH_CARD_TYPE_OSN)
  52                 return -EPERM;
  53
  54         switch (cmd) {
  55         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
  56                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
  57                 break;
  58         case SIOC_QETH_GET_CARD_TYPE:
  59                 if ((card->info.type == QETH_CARD_TYPE_OSD ||
  60                      card->info.type == QETH_CARD_TYPE_OSM ||
  61                      card->info.type == QETH_CARD_TYPE_OSX) &&
  62                     !card->info.guestlan)
  63                         return 1;
  64                 return 0;
  65                 break;
  66         case SIOCGMIIPHY:
  67                 mii_data = if_mii(rq);
  68                 mii_data->phy_id = 0;
  69                 break;
  70         case SIOCGMIIREG:
  71                 mii_data = if_mii(rq);
  72                 if (mii_data->phy_id != 0)
  73                         rc = -EINVAL;
  74                 else
  75                         mii_data->val_out = qeth_mdio_read(dev,
  76                                 mii_data->phy_id, mii_data->reg_num);
  77                 break;
  78         default:
  79                 rc = -EOPNOTSUPP;
  80         }
  81         if (rc)
  82                 QETH_DBF_TEXT_(TRACE, 2, "ioce%d", rc);
  83         return rc;
  84 }
  85
  86 static int qeth_l2_verify_dev(struct net_device *dev)
  87 {
  88         struct qeth_card *card;
  89         unsigned long flags;
  90         int rc = 0;
  91
  92         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
  93         list_for_each_entry(card, &qeth_core_card_list.list, list) {
  94                 if (card->dev == dev) {
  95                         rc = QETH_REAL_CARD;
  96                         break;
  97                 }
  98         }
  99         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
 100
 101         return rc;
 102 }
 103
 104 static struct net_device *qeth_l2_netdev_by_devno(unsigned char *read_dev_no)
 105 {
 106         struct qeth_card *card;
 107         struct net_device *ndev;
 108         __u16 temp_dev_no;
 109         unsigned long flags;
 110         struct ccw_dev_id read_devid;
 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                 ccw_device_get_id(CARD_RDEV(card), &read_devid);
 117                 if (read_devid.devno == temp_dev_no) {
 118                         ndev = card->dev;
 119                         break;
 120                 }
 121         }
 122         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
 123         return ndev;
 124 }
 125
 126 static int qeth_l2_send_setgroupmac_cb(struct qeth_card *card,
 127                                 struct qeth_reply *reply,
 128                                 unsigned long data)
 129 {
 130         struct qeth_ipa_cmd *cmd;
 131         __u8 *mac;
 132
 133         QETH_DBF_TEXT(TRACE, 2, "L2Sgmacb");
 134         cmd = (struct qeth_ipa_cmd *) data;
 135         mac = &cmd->data.setdelmac.mac[0];
 136         /* MAC already registered, needed in couple/uncouple case */
 137         if (cmd->hdr.return_code ==  IPA_RC_L2_DUP_MAC) {
 138                 QETH_DBF_MESSAGE(2, "Group MAC %pM already existing on %s \n",
 139                           mac, QETH_CARD_IFNAME(card));
 140                 cmd->hdr.return_code = 0;
 141         }
 142         if (cmd->hdr.return_code)
 143                 QETH_DBF_MESSAGE(2, "Could not set group MAC %pM on %s: %x\n",
 144                           mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 145         return 0;
 146 }
 147
 148 static int qeth_l2_send_setgroupmac(struct qeth_card *card, __u8 *mac)
 149 {
 150         QETH_DBF_TEXT(TRACE, 2, "L2Sgmac");
 151         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETGMAC,
 152                                           qeth_l2_send_setgroupmac_cb);
 153 }
 154
 155 static int qeth_l2_send_delgroupmac_cb(struct qeth_card *card,
 156                                 struct qeth_reply *reply,
 157                                 unsigned long data)
 158 {
 159         struct qeth_ipa_cmd *cmd;
 160         __u8 *mac;
 161
 162         QETH_DBF_TEXT(TRACE, 2, "L2Dgmacb");
 163         cmd = (struct qeth_ipa_cmd *) data;
 164         mac = &cmd->data.setdelmac.mac[0];
 165         if (cmd->hdr.return_code)
 166                 QETH_DBF_MESSAGE(2, "Could not delete group MAC %pM on %s: %x\n",
 167                           mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 168         return 0;
 169 }
 170
 171 static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac)
 172 {
 173         QETH_DBF_TEXT(TRACE, 2, "L2Dgmac");
 174         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELGMAC,
 175                                           qeth_l2_send_delgroupmac_cb);
 176 }
 177
 178 static void qeth_l2_add_mc(struct qeth_card *card, __u8 *mac, int vmac)
 179 {
 180         struct qeth_mc_mac *mc;
 181         int rc;
 182
 183         mc = kmalloc(sizeof(struct qeth_mc_mac), GFP_ATOMIC);
 184
 185         if (!mc)
 186                 return;
 187
 188         memcpy(mc->mc_addr, mac, OSA_ADDR_LEN);
 189         mc->mc_addrlen = OSA_ADDR_LEN;
 190         mc->is_vmac = vmac;
 191
 192         if (vmac) {
 193                 rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
 194                                         NULL);
 195         } else {
 196                 rc = qeth_l2_send_setgroupmac(card, mac);
 197         }
 198
 199         if (!rc)
 200                 list_add_tail(&mc->list, &card->mc_list);
 201         else
 202                 kfree(mc);
 203 }
 204
 205 static void qeth_l2_del_all_mc(struct qeth_card *card)
 206 {
 207         struct qeth_mc_mac *mc, *tmp;
 208
 209         spin_lock_bh(&card->mclock);
 210         list_for_each_entry_safe(mc, tmp, &card->mc_list, list) {
 211                 if (mc->is_vmac)
 212                         qeth_l2_send_setdelmac(card, mc->mc_addr,
 213                                         IPA_CMD_DELVMAC, NULL);
 214                 else
 215                         qeth_l2_send_delgroupmac(card, mc->mc_addr);
 216                 list_del(&mc->list);
 217                 kfree(mc);
 218         }
 219         spin_unlock_bh(&card->mclock);
 220 }
 221
 222 static inline int qeth_l2_get_cast_type(struct qeth_card *card,
 223                         struct sk_buff *skb)
 224 {
 225         if (card->info.type == QETH_CARD_TYPE_OSN)
 226                 return RTN_UNSPEC;
 227         if (is_broadcast_ether_addr(skb->data))
 228                 return RTN_BROADCAST;
 229         if (is_multicast_ether_addr(skb->data))
 230                 return RTN_MULTICAST;
 231         return RTN_UNSPEC;
 232 }
 233
 234 static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
 235                         struct sk_buff *skb, int ipv, int cast_type)
 236 {
 237         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
 238
 239         memset(hdr, 0, sizeof(struct qeth_hdr));
 240         hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
 241
 242         /* set byte byte 3 to casting flags */
 243         if (cast_type == RTN_MULTICAST)
 244                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 245         else if (cast_type == RTN_BROADCAST)
 246                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 247         else
 248                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 249
 250         hdr->hdr.l2.pkt_length = skb->len-QETH_HEADER_SIZE;
 251         /* VSWITCH relies on the VLAN
 252          * information to be present in
 253          * the QDIO header */
 254         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
 255                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
 256                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
 257         }
 258 }
 259
 260 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
 261                         struct qeth_reply *reply, unsigned long data)
 262 {
 263         struct qeth_ipa_cmd *cmd;
 264
 265         QETH_DBF_TEXT(TRACE, 2, "L2sdvcb");
 266         cmd = (struct qeth_ipa_cmd *) data;
 267         if (cmd->hdr.return_code) {
 268                 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x. "
 269                           "Continuing\n", cmd->data.setdelvlan.vlan_id,
 270                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 271                 QETH_DBF_TEXT_(TRACE, 2, "L2VL%4x", cmd->hdr.command);
 272                 QETH_DBF_TEXT_(TRACE, 2, "L2%s", CARD_BUS_ID(card));
 273                 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
 274         }
 275         return 0;
 276 }
 277
 278 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
 279                                 enum qeth_ipa_cmds ipacmd)
 280 {
 281         struct qeth_ipa_cmd *cmd;
 282         struct qeth_cmd_buffer *iob;
 283
 284         QETH_DBF_TEXT_(TRACE, 4, "L2sdv%x", ipacmd);
 285         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 286         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 287         cmd->data.setdelvlan.vlan_id = i;
 288         return qeth_send_ipa_cmd(card, iob,
 289                                  qeth_l2_send_setdelvlan_cb, NULL);
 290 }
 291
 292 static void qeth_l2_process_vlans(struct qeth_card *card, int clear)
 293 {
 294         struct qeth_vlan_vid *id;
 295         QETH_DBF_TEXT(TRACE, 3, "L2prcvln");
 296         spin_lock_bh(&card->vlanlock);
 297         list_for_each_entry(id, &card->vid_list, list) {
 298                 if (clear)
 299                         qeth_l2_send_setdelvlan(card, id->vid,
 300                                 IPA_CMD_DELVLAN);
 301                 else
 302                         qeth_l2_send_setdelvlan(card, id->vid,
 303                                 IPA_CMD_SETVLAN);
 304         }
 305         spin_unlock_bh(&card->vlanlock);
 306 }
 307
 308 static void qeth_l2_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
 309 {
 310         struct qeth_card *card = dev->ml_priv;
 311         struct qeth_vlan_vid *id;
 312
 313         QETH_DBF_TEXT_(TRACE, 4, "aid:%d", vid);
 314         if (card->info.type == QETH_CARD_TYPE_OSM) {
 315                 QETH_DBF_TEXT(TRACE, 3, "aidOSM");
 316                 return;
 317         }
 318         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 319                 QETH_DBF_TEXT(TRACE, 3, "aidREC");
 320                 return;
 321         }
 322         id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
 323         if (id) {
 324                 id->vid = vid;
 325                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
 326                 spin_lock_bh(&card->vlanlock);
 327                 list_add_tail(&id->list, &card->vid_list);
 328                 spin_unlock_bh(&card->vlanlock);
 329         }
 330 }
 331
 332 static void qeth_l2_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
 333 {
 334         struct qeth_vlan_vid *id, *tmpid = NULL;
 335         struct qeth_card *card = dev->ml_priv;
 336
 337         QETH_DBF_TEXT_(TRACE, 4, "kid:%d", vid);
 338         if (card->info.type == QETH_CARD_TYPE_OSM) {
 339                 QETH_DBF_TEXT(TRACE, 3, "kidOSM");
 340                 return;
 341         }
 342         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 343                 QETH_DBF_TEXT(TRACE, 3, "kidREC");
 344                 return;
 345         }
 346         spin_lock_bh(&card->vlanlock);
 347         list_for_each_entry(id, &card->vid_list, list) {
 348                 if (id->vid == vid) {
 349                         list_del(&id->list);
 350                         tmpid = id;
 351                         break;
 352                 }
 353         }
 354         spin_unlock_bh(&card->vlanlock);
 355         if (tmpid) {
 356                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 357                 kfree(tmpid);
 358         }
 359         qeth_l2_set_multicast_list(card->dev);
 360 }
 361
 362 static int qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
 363 {
 364         int rc = 0;
 365
 366         QETH_DBF_TEXT(SETUP , 2, "stopcard");
 367         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 368
 369         qeth_set_allowed_threads(card, 0, 1);
 370         if (card->read.state == CH_STATE_UP &&
 371             card->write.state == CH_STATE_UP &&
 372             (card->state == CARD_STATE_UP)) {
 373                 if (recovery_mode &&
 374                     card->info.type != QETH_CARD_TYPE_OSN) {
 375                         qeth_l2_stop(card->dev);
 376                 } else {
 377                         rtnl_lock();
 378                         dev_close(card->dev);
 379                         rtnl_unlock();
 380                 }
 381                 if (!card->use_hard_stop ||
 382                         recovery_mode) {
 383                         __u8 *mac = &card->dev->dev_addr[0];
 384                         rc = qeth_l2_send_delmac(card, mac);
 385                         QETH_DBF_TEXT_(SETUP, 2, "Lerr%d", rc);
 386                 }
 387                 card->state = CARD_STATE_SOFTSETUP;
 388         }
 389         if (card->state == CARD_STATE_SOFTSETUP) {
 390                 qeth_l2_process_vlans(card, 1);
 391                 if (!card->use_hard_stop ||
 392                         recovery_mode)
 393                         qeth_l2_del_all_mc(card);
 394                 qeth_clear_ipacmd_list(card);
 395                 card->state = CARD_STATE_HARDSETUP;
 396         }
 397         if (card->state == CARD_STATE_HARDSETUP) {
 398                 qeth_qdio_clear_card(card, 0);
 399                 qeth_clear_qdio_buffers(card);
 400                 qeth_clear_working_pool_list(card);
 401                 card->state = CARD_STATE_DOWN;
 402         }
 403         if (card->state == CARD_STATE_DOWN) {
 404                 qeth_clear_cmd_buffers(&card->read);
 405                 qeth_clear_cmd_buffers(&card->write);
 406         }
 407         card->use_hard_stop = 0;
 408         return rc;
 409 }
 410
 411 static void qeth_l2_process_inbound_buffer(struct qeth_card *card,
 412                             struct qeth_qdio_buffer *buf, int index)
 413 {
 414         struct qdio_buffer_element *element;
 415         struct sk_buff *skb;
 416         struct qeth_hdr *hdr;
 417         int offset;
 418         unsigned int len;
 419
 420         /* get first element of current buffer */
 421         element = (struct qdio_buffer_element *)&buf->buffer->element[0];
 422         offset = 0;
 423         if (card->options.performance_stats)
 424                 card->perf_stats.bufs_rec++;
 425         while ((skb = qeth_core_get_next_skb(card, buf->buffer, &element,
 426                                        &offset, &hdr))) {
 427                 skb->dev = card->dev;
 428                 /* is device UP ? */
 429                 if (!(card->dev->flags & IFF_UP)) {
 430                         dev_kfree_skb_any(skb);
 431                         continue;
 432                 }
 433
 434                 switch (hdr->hdr.l2.id) {
 435                 case QETH_HEADER_TYPE_LAYER2:
 436                         skb->pkt_type = PACKET_HOST;
 437                         skb->protocol = eth_type_trans(skb, skb->dev);
 438                         if (card->options.checksum_type == NO_CHECKSUMMING)
 439                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 440                         else
 441                                 skb->ip_summed = CHECKSUM_NONE;
 442                         if (skb->protocol == htons(ETH_P_802_2))
 443                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
 444                         len = skb->len;
 445                         netif_rx(skb);
 446                         break;
 447                 case QETH_HEADER_TYPE_OSN:
 448                         if (card->info.type == QETH_CARD_TYPE_OSN) {
 449                                 skb_push(skb, sizeof(struct qeth_hdr));
 450                                 skb_copy_to_linear_data(skb, hdr,
 451                                                 sizeof(struct qeth_hdr));
 452                                 len = skb->len;
 453                                 card->osn_info.data_cb(skb);
 454                                 break;
 455                         }
 456                         /* else unknown */
 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->stats.rx_packets++;
 464                 card->stats.rx_bytes += len;
 465         }
 466 }
 467
 468 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
 469                            enum qeth_ipa_cmds ipacmd,
 470                            int (*reply_cb) (struct qeth_card *,
 471                                             struct qeth_reply*,
 472                                             unsigned long))
 473 {
 474         struct qeth_ipa_cmd *cmd;
 475         struct qeth_cmd_buffer *iob;
 476
 477         QETH_DBF_TEXT(TRACE, 2, "L2sdmac");
 478         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 479         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 480         cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
 481         memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
 482         return qeth_send_ipa_cmd(card, iob, reply_cb, NULL);
 483 }
 484
 485 static int qeth_l2_send_setmac_cb(struct qeth_card *card,
 486                            struct qeth_reply *reply,
 487                            unsigned long data)
 488 {
 489         struct qeth_ipa_cmd *cmd;
 490
 491         QETH_DBF_TEXT(TRACE, 2, "L2Smaccb");
 492         cmd = (struct qeth_ipa_cmd *) data;
 493         if (cmd->hdr.return_code) {
 494                 QETH_DBF_TEXT_(TRACE, 2, "L2er%x", cmd->hdr.return_code);
 495                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 496                 switch (cmd->hdr.return_code) {
 497                 case IPA_RC_L2_DUP_MAC:
 498                 case IPA_RC_L2_DUP_LAYER3_MAC:
 499                         dev_warn(&card->gdev->dev,
 500                                 "MAC address %pM already exists\n",
 501                                 card->dev->dev_addr);
 502                         break;
 503                 case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
 504                 case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
 505                         dev_warn(&card->gdev->dev,
 506                                 "MAC address %pM is not authorized\n",
 507                                 card->dev->dev_addr);
 508                         break;
 509                 default:
 510                         break;
 511                 }
 512                 cmd->hdr.return_code = -EIO;
 513         } else {
 514                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 515                 memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
 516                        OSA_ADDR_LEN);
 517                 dev_info(&card->gdev->dev,
 518                         "MAC address %pM successfully registered on device %s\n",
 519                         card->dev->dev_addr, card->dev->name);
 520         }
 521         return 0;
 522 }
 523
 524 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
 525 {
 526         QETH_DBF_TEXT(TRACE, 2, "L2Setmac");
 527         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
 528                                           qeth_l2_send_setmac_cb);
 529 }
 530
 531 static int qeth_l2_send_delmac_cb(struct qeth_card *card,
 532                            struct qeth_reply *reply,
 533                            unsigned long data)
 534 {
 535         struct qeth_ipa_cmd *cmd;
 536
 537         QETH_DBF_TEXT(TRACE, 2, "L2Dmaccb");
 538         cmd = (struct qeth_ipa_cmd *) data;
 539         if (cmd->hdr.return_code) {
 540                 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
 541                 cmd->hdr.return_code = -EIO;
 542                 return 0;
 543         }
 544         card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 545
 546         return 0;
 547 }
 548
 549 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
 550 {
 551         QETH_DBF_TEXT(TRACE, 2, "L2Delmac");
 552         if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
 553                 return 0;
 554         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
 555                                           qeth_l2_send_delmac_cb);
 556 }
 557
 558 static int qeth_l2_request_initial_mac(struct qeth_card *card)
 559 {
 560         int rc = 0;
 561         char vendor_pre[] = {0x02, 0x00, 0x00};
 562
 563         QETH_DBF_TEXT(SETUP, 2, "doL2init");
 564         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
 565
 566         rc = qeth_query_setadapterparms(card);
 567         if (rc) {
 568                 QETH_DBF_MESSAGE(2, "could not query adapter parameters on "
 569                         "device %s: x%x\n", CARD_BUS_ID(card), rc);
 570         }
 571
 572         if (card->info.type == QETH_CARD_TYPE_IQD ||
 573             card->info.type == QETH_CARD_TYPE_OSM ||
 574             card->info.type == QETH_CARD_TYPE_OSX ||
 575             card->info.guestlan) {
 576                 rc = qeth_setadpparms_change_macaddr(card);
 577                 if (rc) {
 578                         QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
 579                                 "device %s: x%x\n", CARD_BUS_ID(card), rc);
 580                         QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 581                         return rc;
 582                 }
 583                 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN);
 584         } else {
 585                 random_ether_addr(card->dev->dev_addr);
 586                 memcpy(card->dev->dev_addr, vendor_pre, 3);
 587         }
 588         return 0;
 589 }
 590
 591 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 592 {
 593         struct sockaddr *addr = p;
 594         struct qeth_card *card = dev->ml_priv;
 595         int rc = 0;
 596
 597         QETH_DBF_TEXT(TRACE, 3, "setmac");
 598
 599         if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
 600                 QETH_DBF_TEXT(TRACE, 3, "setmcINV");
 601                 return -EOPNOTSUPP;
 602         }
 603
 604         if (card->info.type == QETH_CARD_TYPE_OSN ||
 605             card->info.type == QETH_CARD_TYPE_OSM ||
 606             card->info.type == QETH_CARD_TYPE_OSX) {
 607                 QETH_DBF_TEXT(TRACE, 3, "setmcTYP");
 608                 return -EOPNOTSUPP;
 609         }
 610         QETH_DBF_TEXT_(TRACE, 3, "%s", CARD_BUS_ID(card));
 611         QETH_DBF_HEX(TRACE, 3, addr->sa_data, OSA_ADDR_LEN);
 612         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 613                 QETH_DBF_TEXT(TRACE, 3, "setmcREC");
 614                 return -ERESTARTSYS;
 615         }
 616         rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
 617         if (!rc)
 618                 rc = qeth_l2_send_setmac(card, addr->sa_data);
 619         return rc;
 620 }
 621
 622 static void qeth_l2_set_multicast_list(struct net_device *dev)
 623 {
 624         struct qeth_card *card = dev->ml_priv;
 625         struct netdev_hw_addr *ha;
 626
 627         if (card->info.type == QETH_CARD_TYPE_OSN)
 628                 return ;
 629
 630         QETH_DBF_TEXT(TRACE, 3, "setmulti");
 631         if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
 632             (card->state != CARD_STATE_UP))
 633                 return;
 634         qeth_l2_del_all_mc(card);
 635         spin_lock_bh(&card->mclock);
 636         netdev_for_each_mc_addr(ha, dev)
 637                 qeth_l2_add_mc(card, ha->addr, 0);
 638
 639         netdev_for_each_uc_addr(ha, dev)
 640                 qeth_l2_add_mc(card, ha->addr, 1);
 641
 642         spin_unlock_bh(&card->mclock);
 643         if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
 644                 return;
 645         qeth_setadp_promisc_mode(card);
 646 }
 647
 648 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 649 {
 650         int rc;
 651         struct qeth_hdr *hdr = NULL;
 652         int elements = 0;
 653         struct qeth_card *card = dev->ml_priv;
 654         struct sk_buff *new_skb = skb;
 655         int ipv = qeth_get_ip_version(skb);
 656         int cast_type = qeth_l2_get_cast_type(card, skb);
 657         struct qeth_qdio_out_q *queue = card->qdio.out_qs
 658                 [qeth_get_priority_queue(card, skb, ipv, cast_type)];
 659         int tx_bytes = skb->len;
 660         int data_offset = -1;
 661         int elements_needed = 0;
 662         int hd_len = 0;
 663
 664         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
 665                 card->stats.tx_carrier_errors++;
 666                 goto tx_drop;
 667         }
 668
 669         if ((card->info.type == QETH_CARD_TYPE_OSN) &&
 670             (skb->protocol == htons(ETH_P_IPV6)))
 671                 goto tx_drop;
 672
 673         if (card->options.performance_stats) {
 674                 card->perf_stats.outbound_cnt++;
 675                 card->perf_stats.outbound_start_time = qeth_get_micros();
 676         }
 677         netif_stop_queue(dev);
 678
 679         if (card->info.type == QETH_CARD_TYPE_OSN)
 680                 hdr = (struct qeth_hdr *)skb->data;
 681         else {
 682                 if (card->info.type == QETH_CARD_TYPE_IQD) {
 683                         new_skb = skb;
 684                         data_offset = ETH_HLEN;
 685                         hd_len = ETH_HLEN;
 686                         hdr = kmem_cache_alloc(qeth_core_header_cache,
 687                                                 GFP_ATOMIC);
 688                         if (!hdr)
 689                                 goto tx_drop;
 690                         elements_needed++;
 691                         skb_reset_mac_header(new_skb);
 692                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 693                         hdr->hdr.l2.pkt_length = new_skb->len;
 694                         memcpy(((char *)hdr) + sizeof(struct qeth_hdr),
 695                                 skb_mac_header(new_skb), ETH_HLEN);
 696                 } else {
 697                         /* create a clone with writeable headroom */
 698                         new_skb = skb_realloc_headroom(skb,
 699                                                 sizeof(struct qeth_hdr));
 700                         if (!new_skb)
 701                                 goto tx_drop;
 702                         hdr = (struct qeth_hdr *)skb_push(new_skb,
 703                                                 sizeof(struct qeth_hdr));
 704                         skb_set_mac_header(new_skb, sizeof(struct qeth_hdr));
 705                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 706                 }
 707         }
 708
 709         elements = qeth_get_elements_no(card, (void *)hdr, new_skb,
 710                                                 elements_needed);
 711         if (!elements) {
 712                 if (data_offset >= 0)
 713                         kmem_cache_free(qeth_core_header_cache, hdr);
 714                 goto tx_drop;
 715         }
 716
 717         if (card->info.type != QETH_CARD_TYPE_IQD)
 718                 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
 719                                          elements);
 720         else
 721                 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
 722                                         elements, data_offset, hd_len);
 723         if (!rc) {
 724                 card->stats.tx_packets++;
 725                 card->stats.tx_bytes += tx_bytes;
 726                 if (new_skb != skb)
 727                         dev_kfree_skb_any(skb);
 728                 rc = NETDEV_TX_OK;
 729         } else {
 730                 if (data_offset >= 0)
 731                         kmem_cache_free(qeth_core_header_cache, hdr);
 732
 733                 if (rc == -EBUSY) {
 734                         if (new_skb != skb)
 735                                 dev_kfree_skb_any(new_skb);
 736                         return NETDEV_TX_BUSY;
 737                 } else
 738                         goto tx_drop;
 739         }
 740
 741         netif_wake_queue(dev);
 742         if (card->options.performance_stats)
 743                 card->perf_stats.outbound_time += qeth_get_micros() -
 744                         card->perf_stats.outbound_start_time;
 745         return rc;
 746
 747 tx_drop:
 748         card->stats.tx_dropped++;
 749         card->stats.tx_errors++;
 750         if ((new_skb != skb) && new_skb)
 751                 dev_kfree_skb_any(new_skb);
 752         dev_kfree_skb_any(skb);
 753         netif_wake_queue(dev);
 754         return NETDEV_TX_OK;
 755 }
 756
 757 static void qeth_l2_qdio_input_handler(struct ccw_device *ccwdev,
 758                         unsigned int qdio_err, unsigned int queue,
 759                         int first_element, int count, unsigned long card_ptr)
 760 {
 761         struct net_device *net_dev;
 762         struct qeth_card *card;
 763         struct qeth_qdio_buffer *buffer;
 764         int index;
 765         int i;
 766
 767         card = (struct qeth_card *) card_ptr;
 768         net_dev = card->dev;
 769         if (card->options.performance_stats) {
 770                 card->perf_stats.inbound_cnt++;
 771                 card->perf_stats.inbound_start_time = qeth_get_micros();
 772         }
 773         if (qdio_err & QDIO_ERROR_ACTIVATE_CHECK_CONDITION) {
 774                 QETH_DBF_TEXT(TRACE, 1, "qdinchk");
 775                 QETH_DBF_TEXT_(TRACE, 1, "%s", CARD_BUS_ID(card));
 776                 QETH_DBF_TEXT_(TRACE, 1, "%04X%04X", first_element,
 777                                 count);
 778                 QETH_DBF_TEXT_(TRACE, 1, "%04X", queue);
 779                 qeth_schedule_recovery(card);
 780                 return;
 781         }
 782         for (i = first_element; i < (first_element + count); ++i) {
 783                 index = i % QDIO_MAX_BUFFERS_PER_Q;
 784                 buffer = &card->qdio.in_q->bufs[index];
 785                 if (!(qdio_err &&
 786                       qeth_check_qdio_errors(card, buffer->buffer, qdio_err,
 787                                              "qinerr")))
 788                         qeth_l2_process_inbound_buffer(card, buffer, index);
 789                 /* clear buffer and give back to hardware */
 790                 qeth_put_buffer_pool_entry(card, buffer->pool_entry);
 791                 qeth_queue_input_buffer(card, index);
 792         }
 793         if (card->options.performance_stats)
 794                 card->perf_stats.inbound_time += qeth_get_micros() -
 795                         card->perf_stats.inbound_start_time;
 796 }
 797
 798 static int qeth_l2_open(struct net_device *dev)
 799 {
 800         struct qeth_card *card = dev->ml_priv;
 801
 802         QETH_DBF_TEXT(TRACE, 4, "qethopen");
 803         if (card->state != CARD_STATE_SOFTSETUP)
 804                 return -ENODEV;
 805
 806         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
 807              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
 808                 QETH_DBF_TEXT(TRACE, 4, "nomacadr");
 809                 return -EPERM;
 810         }
 811         card->data.state = CH_STATE_UP;
 812         card->state = CARD_STATE_UP;
 813         netif_start_queue(dev);
 814
 815         if (!card->lan_online && netif_carrier_ok(dev))
 816                 netif_carrier_off(dev);
 817         return 0;
 818 }
 819
 820
 821 static int qeth_l2_stop(struct net_device *dev)
 822 {
 823         struct qeth_card *card = dev->ml_priv;
 824
 825         QETH_DBF_TEXT(TRACE, 4, "qethstop");
 826         netif_tx_disable(dev);
 827         if (card->state == CARD_STATE_UP)
 828                 card->state = CARD_STATE_SOFTSETUP;
 829         return 0;
 830 }
 831
 832 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 833 {
 834         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 835
 836         INIT_LIST_HEAD(&card->vid_list);
 837         INIT_LIST_HEAD(&card->mc_list);
 838         card->options.layer2 = 1;
 839         card->discipline.input_handler = (qdio_handler_t *)
 840                 qeth_l2_qdio_input_handler;
 841         card->discipline.output_handler = (qdio_handler_t *)
 842                 qeth_qdio_output_handler;
 843         card->discipline.recover = qeth_l2_recover;
 844         return 0;
 845 }
 846
 847 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
 848 {
 849         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
 850
 851         qeth_set_allowed_threads(card, 0, 1);
 852         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 853
 854         if (cgdev->state == CCWGROUP_ONLINE) {
 855                 card->use_hard_stop = 1;
 856                 qeth_l2_set_offline(cgdev);
 857         }
 858
 859         if (card->dev) {
 860                 unregister_netdev(card->dev);
 861                 card->dev = NULL;
 862         }
 863
 864         qeth_l2_del_all_mc(card);
 865         return;
 866 }
 867
 868 static const struct ethtool_ops qeth_l2_ethtool_ops = {
 869         .get_link = ethtool_op_get_link,
 870         .get_strings = qeth_core_get_strings,
 871         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 872         .get_sset_count = qeth_core_get_sset_count,
 873         .get_drvinfo = qeth_core_get_drvinfo,
 874         .get_settings = qeth_core_ethtool_get_settings,
 875 };
 876
 877 static const struct ethtool_ops qeth_l2_osn_ops = {
 878         .get_strings = qeth_core_get_strings,
 879         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 880         .get_sset_count = qeth_core_get_sset_count,
 881         .get_drvinfo = qeth_core_get_drvinfo,
 882 };
 883
 884 static const struct net_device_ops qeth_l2_netdev_ops = {
 885         .ndo_open               = qeth_l2_open,
 886         .ndo_stop               = qeth_l2_stop,
 887         .ndo_get_stats          = qeth_get_stats,
 888         .ndo_start_xmit         = qeth_l2_hard_start_xmit,
 889         .ndo_validate_addr      = eth_validate_addr,
 890         .ndo_set_multicast_list = qeth_l2_set_multicast_list,
 891         .ndo_do_ioctl           = qeth_l2_do_ioctl,
 892         .ndo_set_mac_address    = qeth_l2_set_mac_address,
 893         .ndo_change_mtu         = qeth_change_mtu,
 894         .ndo_vlan_rx_add_vid    = qeth_l2_vlan_rx_add_vid,
 895         .ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,
 896         .ndo_tx_timeout         = qeth_tx_timeout,
 897 };
 898
 899 static int qeth_l2_setup_netdev(struct qeth_card *card)
 900 {
 901         switch (card->info.type) {
 902         case QETH_CARD_TYPE_IQD:
 903                 card->dev = alloc_netdev(0, "hsi%d", ether_setup);
 904                 break;
 905         case QETH_CARD_TYPE_OSN:
 906                 card->dev = alloc_netdev(0, "osn%d", ether_setup);
 907                 card->dev->flags |= IFF_NOARP;
 908                 break;
 909         default:
 910                 card->dev = alloc_etherdev(0);
 911         }
 912
 913         if (!card->dev)
 914                 return -ENODEV;
 915
 916         card->dev->ml_priv = card;
 917         card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
 918         card->dev->mtu = card->info.initial_mtu;
 919         card->dev->netdev_ops = &qeth_l2_netdev_ops;
 920         if (card->info.type != QETH_CARD_TYPE_OSN)
 921                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops);
 922         else
 923                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops);
 924         card->dev->features |= NETIF_F_HW_VLAN_FILTER;
 925         card->info.broadcast_capable = 1;
 926         qeth_l2_request_initial_mac(card);
 927         SET_NETDEV_DEV(card->dev, &card->gdev->dev);
 928         return register_netdev(card->dev);
 929 }
 930
 931 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 932 {
 933         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 934         int rc = 0;
 935         enum qeth_card_states recover_flag;
 936
 937         BUG_ON(!card);
 938         mutex_lock(&card->conf_mutex);
 939         QETH_DBF_TEXT(SETUP, 2, "setonlin");
 940         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 941
 942         recover_flag = card->state;
 943         rc = qeth_core_hardsetup_card(card);
 944         if (rc) {
 945                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
 946                 rc = -ENODEV;
 947                 goto out_remove;
 948         }
 949
 950         if (!card->dev && qeth_l2_setup_netdev(card)) {
 951                 rc = -ENODEV;
 952                 goto out_remove;
 953         }
 954
 955         if (card->info.type != QETH_CARD_TYPE_OSN)
 956                 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
 957
 958         card->state = CARD_STATE_HARDSETUP;
 959         qeth_print_status_message(card);
 960
 961         /* softsetup */
 962         QETH_DBF_TEXT(SETUP, 2, "softsetp");
 963
 964         rc = qeth_send_startlan(card);
 965         if (rc) {
 966                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 967                 if (rc == 0xe080) {
 968                         dev_warn(&card->gdev->dev,
 969                                 "The LAN is offline\n");
 970                         card->lan_online = 0;
 971                         goto out;
 972                 }
 973                 rc = -ENODEV;
 974                 goto out_remove;
 975         } else
 976                 card->lan_online = 1;
 977
 978         if ((card->info.type == QETH_CARD_TYPE_OSD) ||
 979             (card->info.type == QETH_CARD_TYPE_OSX))
 980                 /* configure isolation level */
 981                 qeth_set_access_ctrl_online(card);
 982
 983         if (card->info.type != QETH_CARD_TYPE_OSN &&
 984             card->info.type != QETH_CARD_TYPE_OSM)
 985                 qeth_l2_process_vlans(card, 0);
 986
 987         netif_tx_disable(card->dev);
 988
 989         rc = qeth_init_qdio_queues(card);
 990         if (rc) {
 991                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
 992                 rc = -ENODEV;
 993                 goto out_remove;
 994         }
 995         card->state = CARD_STATE_SOFTSETUP;
 996         netif_carrier_on(card->dev);
 997
 998         qeth_set_allowed_threads(card, 0xffffffff, 0);
 999         if (recover_flag == CARD_STATE_RECOVER) {
1000                 if (recovery_mode &&
1001                     card->info.type != QETH_CARD_TYPE_OSN) {
1002                         qeth_l2_open(card->dev);
1003                 } else {
1004                         rtnl_lock();
1005                         dev_open(card->dev);
1006                         rtnl_unlock();
1007                 }
1008                 /* this also sets saved unicast addresses */
1009                 qeth_l2_set_multicast_list(card->dev);
1010         }
1011         /* let user_space know that device is online */
1012         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1013 out:
1014         mutex_unlock(&card->conf_mutex);
1015         return 0;
1016
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         mutex_unlock(&card->conf_mutex);
1028         return rc;
1029 }
1030
1031 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1032 {
1033         return __qeth_l2_set_online(gdev, 0);
1034 }
1035
1036 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1037                                         int recovery_mode)
1038 {
1039         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1040         int rc = 0, rc2 = 0, rc3 = 0;
1041         enum qeth_card_states recover_flag;
1042
1043         mutex_lock(&card->conf_mutex);
1044         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1045         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1046
1047         if (card->dev && netif_carrier_ok(card->dev))
1048                 netif_carrier_off(card->dev);
1049         recover_flag = card->state;
1050         qeth_l2_stop_card(card, recovery_mode);
1051         rc  = ccw_device_set_offline(CARD_DDEV(card));
1052         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1053         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1054         if (!rc)
1055                 rc = (rc2) ? rc2 : rc3;
1056         if (rc)
1057                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1058         if (recover_flag == CARD_STATE_UP)
1059                 card->state = CARD_STATE_RECOVER;
1060         /* let user_space know that device is offline */
1061         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1062         mutex_unlock(&card->conf_mutex);
1063         return 0;
1064 }
1065
1066 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1067 {
1068         return __qeth_l2_set_offline(cgdev, 0);
1069 }
1070
1071 static int qeth_l2_recover(void *ptr)
1072 {
1073         struct qeth_card *card;
1074         int rc = 0;
1075
1076         card = (struct qeth_card *) ptr;
1077         QETH_DBF_TEXT(TRACE, 2, "recover1");
1078         QETH_DBF_HEX(TRACE, 2, &card, sizeof(void *));
1079         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1080                 return 0;
1081         QETH_DBF_TEXT(TRACE, 2, "recover2");
1082         dev_warn(&card->gdev->dev,
1083                 "A recovery process has been started for the device\n");
1084         card->use_hard_stop = 1;
1085         __qeth_l2_set_offline(card->gdev, 1);
1086         rc = __qeth_l2_set_online(card->gdev, 1);
1087         /* don't run another scheduled recovery */
1088         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1089         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1090         if (!rc)
1091                 dev_info(&card->gdev->dev,
1092                         "Device successfully recovered!\n");
1093         else {
1094                 rtnl_lock();
1095                 dev_close(card->dev);
1096                 rtnl_unlock();
1097                 dev_warn(&card->gdev->dev, "The qeth device driver "
1098                         "failed to recover an error on the device\n");
1099         }
1100         return 0;
1101 }
1102
1103 static int __init qeth_l2_init(void)
1104 {
1105         pr_info("register layer 2 discipline\n");
1106         return 0;
1107 }
1108
1109 static void __exit qeth_l2_exit(void)
1110 {
1111         pr_info("unregister layer 2 discipline\n");
1112 }
1113
1114 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1115 {
1116         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1117         qeth_qdio_clear_card(card, 0);
1118         qeth_clear_qdio_buffers(card);
1119 }
1120
1121 static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev)
1122 {
1123         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1124
1125         if (card->dev)
1126                 netif_device_detach(card->dev);
1127         qeth_set_allowed_threads(card, 0, 1);
1128         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1129         if (gdev->state == CCWGROUP_OFFLINE)
1130                 return 0;
1131         if (card->state == CARD_STATE_UP) {
1132                 card->use_hard_stop = 1;
1133                 __qeth_l2_set_offline(card->gdev, 1);
1134         } else
1135                 __qeth_l2_set_offline(card->gdev, 0);
1136         return 0;
1137 }
1138
1139 static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
1140 {
1141         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1142         int rc = 0;
1143
1144         if (gdev->state == CCWGROUP_OFFLINE)
1145                 goto out;
1146
1147         if (card->state == CARD_STATE_RECOVER) {
1148                 rc = __qeth_l2_set_online(card->gdev, 1);
1149                 if (rc) {
1150                         rtnl_lock();
1151                         dev_close(card->dev);
1152                         rtnl_unlock();
1153                 }
1154         } else
1155                 rc = __qeth_l2_set_online(card->gdev, 0);
1156 out:
1157         qeth_set_allowed_threads(card, 0xffffffff, 0);
1158         if (card->dev)
1159                 netif_device_attach(card->dev);
1160         if (rc)
1161                 dev_warn(&card->gdev->dev, "The qeth device driver "
1162                         "failed to recover an error on the device\n");
1163         return rc;
1164 }
1165
1166 struct ccwgroup_driver qeth_l2_ccwgroup_driver = {
1167         .probe = qeth_l2_probe_device,
1168         .remove = qeth_l2_remove_device,
1169         .set_online = qeth_l2_set_online,
1170         .set_offline = qeth_l2_set_offline,
1171         .shutdown = qeth_l2_shutdown,
1172         .freeze = qeth_l2_pm_suspend,
1173         .thaw = qeth_l2_pm_resume,
1174         .restore = qeth_l2_pm_resume,
1175 };
1176 EXPORT_SYMBOL_GPL(qeth_l2_ccwgroup_driver);
1177
1178 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1179                            struct qeth_cmd_buffer *iob)
1180 {
1181         unsigned long flags;
1182         int rc = 0;
1183
1184         QETH_DBF_TEXT(TRACE, 5, "osndctrd");
1185
1186         wait_event(card->wait_q,
1187                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1188         qeth_prepare_control_data(card, len, iob);
1189         QETH_DBF_TEXT(TRACE, 6, "osnoirqp");
1190         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1191         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1192                               (addr_t) iob, 0, 0);
1193         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1194         if (rc) {
1195                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1196                            "ccw_device_start rc = %i\n", rc);
1197                 QETH_DBF_TEXT_(TRACE, 2, " err%d", rc);
1198                 qeth_release_buffer(iob->channel, iob);
1199                 atomic_set(&card->write.irq_pending, 0);
1200                 wake_up(&card->wait_q);
1201         }
1202         return rc;
1203 }
1204
1205 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1206                         struct qeth_cmd_buffer *iob, int data_len)
1207 {
1208         u16 s1, s2;
1209
1210         QETH_DBF_TEXT(TRACE, 4, "osndipa");
1211
1212         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1213         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1214         s2 = (u16)data_len;
1215         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1216         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1217         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1218         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1219         return qeth_osn_send_control_data(card, s1, iob);
1220 }
1221
1222 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1223 {
1224         struct qeth_cmd_buffer *iob;
1225         struct qeth_card *card;
1226         int rc;
1227
1228         QETH_DBF_TEXT(TRACE, 2, "osnsdmc");
1229         if (!dev)
1230                 return -ENODEV;
1231         card = dev->ml_priv;
1232         if (!card)
1233                 return -ENODEV;
1234         if ((card->state != CARD_STATE_UP) &&
1235             (card->state != CARD_STATE_SOFTSETUP))
1236                 return -ENODEV;
1237         iob = qeth_wait_for_buffer(&card->write);
1238         memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1239         rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1240         return rc;
1241 }
1242 EXPORT_SYMBOL(qeth_osn_assist);
1243
1244 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1245                   int (*assist_cb)(struct net_device *, void *),
1246                   int (*data_cb)(struct sk_buff *))
1247 {
1248         struct qeth_card *card;
1249
1250         QETH_DBF_TEXT(TRACE, 2, "osnreg");
1251         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1252         if (*dev == NULL)
1253                 return -ENODEV;
1254         card = (*dev)->ml_priv;
1255         if (!card)
1256                 return -ENODEV;
1257         if ((assist_cb == NULL) || (data_cb == NULL))
1258                 return -EINVAL;
1259         card->osn_info.assist_cb = assist_cb;
1260         card->osn_info.data_cb = data_cb;
1261         return 0;
1262 }
1263 EXPORT_SYMBOL(qeth_osn_register);
1264
1265 void qeth_osn_deregister(struct net_device *dev)
1266 {
1267         struct qeth_card *card;
1268
1269         QETH_DBF_TEXT(TRACE, 2, "osndereg");
1270         if (!dev)
1271                 return;
1272         card = dev->ml_priv;
1273         if (!card)
1274                 return;
1275         card->osn_info.assist_cb = NULL;
1276         card->osn_info.data_cb = NULL;
1277         return;
1278 }
1279 EXPORT_SYMBOL(qeth_osn_deregister);
1280
1281 module_init(qeth_l2_init);
1282 module_exit(qeth_l2_exit);
1283 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1284 MODULE_DESCRIPTION("qeth layer 2 discipline");
1285 MODULE_LICENSE("GPL");