drivers/s390/net/qeth_l2_main.c

   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_OSAE) &&
  60                     !card->info.guestlan)
  61                         return 1;
  62                 return 0;
  63                 break;
  64         case SIOCGMIIPHY:
  65                 mii_data = if_mii(rq);
  66                 mii_data->phy_id = 0;
  67                 break;
  68         case SIOCGMIIREG:
  69                 mii_data = if_mii(rq);
  70                 if (mii_data->phy_id != 0)
  71                         rc = -EINVAL;
  72                 else
  73                         mii_data->val_out = qeth_mdio_read(dev,
  74                                 mii_data->phy_id, mii_data->reg_num);
  75                 break;
  76         default:
  77                 rc = -EOPNOTSUPP;
  78         }
  79         if (rc)
  80                 QETH_DBF_TEXT_(TRACE, 2, "ioce%d", rc);
  81         return rc;
  82 }
  83
  84 static int qeth_l2_verify_dev(struct net_device *dev)
  85 {
  86         struct qeth_card *card;
  87         unsigned long flags;
  88         int rc = 0;
  89
  90         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
  91         list_for_each_entry(card, &qeth_core_card_list.list, list) {
  92                 if (card->dev == dev) {
  93                         rc = QETH_REAL_CARD;
  94                         break;
  95                 }
  96         }
  97         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
  98
  99         return rc;
 100 }
 101
 102 static struct net_device *qeth_l2_netdev_by_devno(unsigned char *read_dev_no)
 103 {
 104         struct qeth_card *card;
 105         struct net_device *ndev;
 106         __u16 temp_dev_no;
 107         unsigned long flags;
 108         struct ccw_dev_id read_devid;
 109
 110         ndev = NULL;
 111         memcpy(&temp_dev_no, read_dev_no, 2);
 112         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
 113         list_for_each_entry(card, &qeth_core_card_list.list, list) {
 114                 ccw_device_get_id(CARD_RDEV(card), &read_devid);
 115                 if (read_devid.devno == temp_dev_no) {
 116                         ndev = card->dev;
 117                         break;
 118                 }
 119         }
 120         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
 121         return ndev;
 122 }
 123
 124 static int qeth_l2_send_setgroupmac_cb(struct qeth_card *card,
 125                                 struct qeth_reply *reply,
 126                                 unsigned long data)
 127 {
 128         struct qeth_ipa_cmd *cmd;
 129         __u8 *mac;
 130
 131         QETH_DBF_TEXT(TRACE, 2, "L2Sgmacb");
 132         cmd = (struct qeth_ipa_cmd *) data;
 133         mac = &cmd->data.setdelmac.mac[0];
 134         /* MAC already registered, needed in couple/uncouple case */
 135         if (cmd->hdr.return_code ==  IPA_RC_L2_DUP_MAC) {
 136                 QETH_DBF_MESSAGE(2, "Group MAC %pM already existing on %s \n",
 137                           mac, QETH_CARD_IFNAME(card));
 138                 cmd->hdr.return_code = 0;
 139         }
 140         if (cmd->hdr.return_code)
 141                 QETH_DBF_MESSAGE(2, "Could not set group MAC %pM on %s: %x\n",
 142                           mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 143         return 0;
 144 }
 145
 146 static int qeth_l2_send_setgroupmac(struct qeth_card *card, __u8 *mac)
 147 {
 148         QETH_DBF_TEXT(TRACE, 2, "L2Sgmac");
 149         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETGMAC,
 150                                           qeth_l2_send_setgroupmac_cb);
 151 }
 152
 153 static int qeth_l2_send_delgroupmac_cb(struct qeth_card *card,
 154                                 struct qeth_reply *reply,
 155                                 unsigned long data)
 156 {
 157         struct qeth_ipa_cmd *cmd;
 158         __u8 *mac;
 159
 160         QETH_DBF_TEXT(TRACE, 2, "L2Dgmacb");
 161         cmd = (struct qeth_ipa_cmd *) data;
 162         mac = &cmd->data.setdelmac.mac[0];
 163         if (cmd->hdr.return_code)
 164                 QETH_DBF_MESSAGE(2, "Could not delete group MAC %pM on %s: %x\n",
 165                           mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 166         return 0;
 167 }
 168
 169 static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac)
 170 {
 171         QETH_DBF_TEXT(TRACE, 2, "L2Dgmac");
 172         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELGMAC,
 173                                           qeth_l2_send_delgroupmac_cb);
 174 }
 175
 176 static void qeth_l2_add_mc(struct qeth_card *card, __u8 *mac, int vmac)
 177 {
 178         struct qeth_mc_mac *mc;
 179         int rc;
 180
 181         mc = kmalloc(sizeof(struct qeth_mc_mac), GFP_ATOMIC);
 182
 183         if (!mc)
 184                 return;
 185
 186         memcpy(mc->mc_addr, mac, OSA_ADDR_LEN);
 187         mc->mc_addrlen = OSA_ADDR_LEN;
 188         mc->is_vmac = vmac;
 189
 190         if (vmac) {
 191                 rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
 192                                         NULL);
 193         } else {
 194                 rc = qeth_l2_send_setgroupmac(card, mac);
 195         }
 196
 197         if (!rc)
 198                 list_add_tail(&mc->list, &card->mc_list);
 199         else
 200                 kfree(mc);
 201 }
 202
 203 static void qeth_l2_del_all_mc(struct qeth_card *card)
 204 {
 205         struct qeth_mc_mac *mc, *tmp;
 206
 207         spin_lock_bh(&card->mclock);
 208         list_for_each_entry_safe(mc, tmp, &card->mc_list, list) {
 209                 if (mc->is_vmac)
 210                         qeth_l2_send_setdelmac(card, mc->mc_addr,
 211                                         IPA_CMD_DELVMAC, NULL);
 212                 else
 213                         qeth_l2_send_delgroupmac(card, mc->mc_addr);
 214                 list_del(&mc->list);
 215                 kfree(mc);
 216         }
 217         spin_unlock_bh(&card->mclock);
 218 }
 219
 220 static inline int qeth_l2_get_cast_type(struct qeth_card *card,
 221                         struct sk_buff *skb)
 222 {
 223         if (card->info.type == QETH_CARD_TYPE_OSN)
 224                 return RTN_UNSPEC;
 225         if (is_broadcast_ether_addr(skb->data))
 226                 return RTN_BROADCAST;
 227         if (is_multicast_ether_addr(skb->data))
 228                 return RTN_MULTICAST;
 229         return RTN_UNSPEC;
 230 }
 231
 232 static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
 233                         struct sk_buff *skb, int ipv, int cast_type)
 234 {
 235         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
 236
 237         memset(hdr, 0, sizeof(struct qeth_hdr));
 238         hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
 239
 240         /* set byte byte 3 to casting flags */
 241         if (cast_type == RTN_MULTICAST)
 242                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 243         else if (cast_type == RTN_BROADCAST)
 244                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 245         else
 246                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 247
 248         hdr->hdr.l2.pkt_length = skb->len-QETH_HEADER_SIZE;
 249         /* VSWITCH relies on the VLAN
 250          * information to be present in
 251          * the QDIO header */
 252         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
 253                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
 254                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
 255         }
 256 }
 257
 258 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
 259                         struct qeth_reply *reply, unsigned long data)
 260 {
 261         struct qeth_ipa_cmd *cmd;
 262
 263         QETH_DBF_TEXT(TRACE, 2, "L2sdvcb");
 264         cmd = (struct qeth_ipa_cmd *) data;
 265         if (cmd->hdr.return_code) {
 266                 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x. "
 267                           "Continuing\n", cmd->data.setdelvlan.vlan_id,
 268                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 269                 QETH_DBF_TEXT_(TRACE, 2, "L2VL%4x", cmd->hdr.command);
 270                 QETH_DBF_TEXT_(TRACE, 2, "L2%s", CARD_BUS_ID(card));
 271                 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
 272         }
 273         return 0;
 274 }
 275
 276 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
 277                                 enum qeth_ipa_cmds ipacmd)
 278 {
 279         struct qeth_ipa_cmd *cmd;
 280         struct qeth_cmd_buffer *iob;
 281
 282         QETH_DBF_TEXT_(TRACE, 4, "L2sdv%x", ipacmd);
 283         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 284         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 285         cmd->data.setdelvlan.vlan_id = i;
 286         return qeth_send_ipa_cmd(card, iob,
 287                                  qeth_l2_send_setdelvlan_cb, NULL);
 288 }
 289
 290 static void qeth_l2_process_vlans(struct qeth_card *card, int clear)
 291 {
 292         struct qeth_vlan_vid *id;
 293         QETH_DBF_TEXT(TRACE, 3, "L2prcvln");
 294         spin_lock_bh(&card->vlanlock);
 295         list_for_each_entry(id, &card->vid_list, list) {
 296                 if (clear)
 297                         qeth_l2_send_setdelvlan(card, id->vid,
 298                                 IPA_CMD_DELVLAN);
 299                 else
 300                         qeth_l2_send_setdelvlan(card, id->vid,
 301                                 IPA_CMD_SETVLAN);
 302         }
 303         spin_unlock_bh(&card->vlanlock);
 304 }
 305
 306 static void qeth_l2_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
 307 {
 308         struct qeth_card *card = dev->ml_priv;
 309         struct qeth_vlan_vid *id;
 310
 311         QETH_DBF_TEXT_(TRACE, 4, "aid:%d", vid);
 312         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 313                 QETH_DBF_TEXT(TRACE, 3, "aidREC");
 314                 return;
 315         }
 316         id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
 317         if (id) {
 318                 id->vid = vid;
 319                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
 320                 spin_lock_bh(&card->vlanlock);
 321                 list_add_tail(&id->list, &card->vid_list);
 322                 spin_unlock_bh(&card->vlanlock);
 323         }
 324 }
 325
 326 static void qeth_l2_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
 327 {
 328         struct qeth_vlan_vid *id, *tmpid = NULL;
 329         struct qeth_card *card = dev->ml_priv;
 330
 331         QETH_DBF_TEXT_(TRACE, 4, "kid:%d", vid);
 332         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 333                 QETH_DBF_TEXT(TRACE, 3, "kidREC");
 334                 return;
 335         }
 336         spin_lock_bh(&card->vlanlock);
 337         list_for_each_entry(id, &card->vid_list, list) {
 338                 if (id->vid == vid) {
 339                         list_del(&id->list);
 340                         tmpid = id;
 341                         break;
 342                 }
 343         }
 344         spin_unlock_bh(&card->vlanlock);
 345         if (tmpid) {
 346                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 347                 kfree(tmpid);
 348         }
 349         qeth_l2_set_multicast_list(card->dev);
 350 }
 351
 352 static int qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
 353 {
 354         int rc = 0;
 355
 356         QETH_DBF_TEXT(SETUP , 2, "stopcard");
 357         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 358
 359         qeth_set_allowed_threads(card, 0, 1);
 360         if (card->read.state == CH_STATE_UP &&
 361             card->write.state == CH_STATE_UP &&
 362             (card->state == CARD_STATE_UP)) {
 363                 if (recovery_mode &&
 364                     card->info.type != QETH_CARD_TYPE_OSN) {
 365                         qeth_l2_stop(card->dev);
 366                 } else {
 367                         rtnl_lock();
 368                         dev_close(card->dev);
 369                         rtnl_unlock();
 370                 }
 371                 if (!card->use_hard_stop ||
 372                         recovery_mode) {
 373                         __u8 *mac = &card->dev->dev_addr[0];
 374                         rc = qeth_l2_send_delmac(card, mac);
 375                         QETH_DBF_TEXT_(SETUP, 2, "Lerr%d", rc);
 376                 }
 377                 card->state = CARD_STATE_SOFTSETUP;
 378         }
 379         if (card->state == CARD_STATE_SOFTSETUP) {
 380                 qeth_l2_process_vlans(card, 1);
 381                 if (!card->use_hard_stop ||
 382                         recovery_mode)
 383                         qeth_l2_del_all_mc(card);
 384                 qeth_clear_ipacmd_list(card);
 385                 card->state = CARD_STATE_HARDSETUP;
 386         }
 387         if (card->state == CARD_STATE_HARDSETUP) {
 388                 qeth_qdio_clear_card(card, 0);
 389                 qeth_clear_qdio_buffers(card);
 390                 qeth_clear_working_pool_list(card);
 391                 card->state = CARD_STATE_DOWN;
 392         }
 393         if (card->state == CARD_STATE_DOWN) {
 394                 qeth_clear_cmd_buffers(&card->read);
 395                 qeth_clear_cmd_buffers(&card->write);
 396         }
 397         card->use_hard_stop = 0;
 398         return rc;
 399 }
 400
 401 static void qeth_l2_process_inbound_buffer(struct qeth_card *card,
 402                             struct qeth_qdio_buffer *buf, int index)
 403 {
 404         struct qdio_buffer_element *element;
 405         struct sk_buff *skb;
 406         struct qeth_hdr *hdr;
 407         int offset;
 408         unsigned int len;
 409
 410         /* get first element of current buffer */
 411         element = (struct qdio_buffer_element *)&buf->buffer->element[0];
 412         offset = 0;
 413         if (card->options.performance_stats)
 414                 card->perf_stats.bufs_rec++;
 415         while ((skb = qeth_core_get_next_skb(card, buf->buffer, &element,
 416                                        &offset, &hdr))) {
 417                 skb->dev = card->dev;
 418                 /* is device UP ? */
 419                 if (!(card->dev->flags & IFF_UP)) {
 420                         dev_kfree_skb_any(skb);
 421                         continue;
 422                 }
 423
 424                 switch (hdr->hdr.l2.id) {
 425                 case QETH_HEADER_TYPE_LAYER2:
 426                         skb->pkt_type = PACKET_HOST;
 427                         skb->protocol = eth_type_trans(skb, skb->dev);
 428                         if (card->options.checksum_type == NO_CHECKSUMMING)
 429                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 430                         else
 431                                 skb->ip_summed = CHECKSUM_NONE;
 432                         if (skb->protocol == htons(ETH_P_802_2))
 433                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
 434                         len = skb->len;
 435                         netif_rx(skb);
 436                         break;
 437                 case QETH_HEADER_TYPE_OSN:
 438                         if (card->info.type == QETH_CARD_TYPE_OSN) {
 439                                 skb_push(skb, sizeof(struct qeth_hdr));
 440                                 skb_copy_to_linear_data(skb, hdr,
 441                                                 sizeof(struct qeth_hdr));
 442                                 len = skb->len;
 443                                 card->osn_info.data_cb(skb);
 444                                 break;
 445                         }
 446                         /* else unknown */
 447                 default:
 448                         dev_kfree_skb_any(skb);
 449                         QETH_DBF_TEXT(TRACE, 3, "inbunkno");
 450                         QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
 451                         continue;
 452                 }
 453                 card->stats.rx_packets++;
 454                 card->stats.rx_bytes += len;
 455         }
 456 }
 457
 458 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
 459                            enum qeth_ipa_cmds ipacmd,
 460                            int (*reply_cb) (struct qeth_card *,
 461                                             struct qeth_reply*,
 462                                             unsigned long))
 463 {
 464         struct qeth_ipa_cmd *cmd;
 465         struct qeth_cmd_buffer *iob;
 466
 467         QETH_DBF_TEXT(TRACE, 2, "L2sdmac");
 468         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 469         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 470         cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
 471         memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
 472         return qeth_send_ipa_cmd(card, iob, reply_cb, NULL);
 473 }
 474
 475 static int qeth_l2_send_setmac_cb(struct qeth_card *card,
 476                            struct qeth_reply *reply,
 477                            unsigned long data)
 478 {
 479         struct qeth_ipa_cmd *cmd;
 480
 481         QETH_DBF_TEXT(TRACE, 2, "L2Smaccb");
 482         cmd = (struct qeth_ipa_cmd *) data;
 483         if (cmd->hdr.return_code) {
 484                 QETH_DBF_TEXT_(TRACE, 2, "L2er%x", cmd->hdr.return_code);
 485                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 486                 switch (cmd->hdr.return_code) {
 487                 case IPA_RC_L2_DUP_MAC:
 488                 case IPA_RC_L2_DUP_LAYER3_MAC:
 489                         dev_warn(&card->gdev->dev,
 490                                 "MAC address %pM already exists\n",
 491                                 card->dev->dev_addr);
 492                         break;
 493                 case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
 494                 case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
 495                         dev_warn(&card->gdev->dev,
 496                                 "MAC address %pM is not authorized\n",
 497                                 card->dev->dev_addr);
 498                         break;
 499                 default:
 500                         break;
 501                 }
 502                 cmd->hdr.return_code = -EIO;
 503         } else {
 504                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 505                 memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
 506                        OSA_ADDR_LEN);
 507                 dev_info(&card->gdev->dev,
 508                         "MAC address %pM successfully registered on device %s\n",
 509                         card->dev->dev_addr, card->dev->name);
 510         }
 511         return 0;
 512 }
 513
 514 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
 515 {
 516         QETH_DBF_TEXT(TRACE, 2, "L2Setmac");
 517         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
 518                                           qeth_l2_send_setmac_cb);
 519 }
 520
 521 static int qeth_l2_send_delmac_cb(struct qeth_card *card,
 522                            struct qeth_reply *reply,
 523                            unsigned long data)
 524 {
 525         struct qeth_ipa_cmd *cmd;
 526
 527         QETH_DBF_TEXT(TRACE, 2, "L2Dmaccb");
 528         cmd = (struct qeth_ipa_cmd *) data;
 529         if (cmd->hdr.return_code) {
 530                 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
 531                 cmd->hdr.return_code = -EIO;
 532                 return 0;
 533         }
 534         card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 535
 536         return 0;
 537 }
 538
 539 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
 540 {
 541         QETH_DBF_TEXT(TRACE, 2, "L2Delmac");
 542         if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
 543                 return 0;
 544         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
 545                                           qeth_l2_send_delmac_cb);
 546 }
 547
 548 static int qeth_l2_request_initial_mac(struct qeth_card *card)
 549 {
 550         int rc = 0;
 551         char vendor_pre[] = {0x02, 0x00, 0x00};
 552
 553         QETH_DBF_TEXT(SETUP, 2, "doL2init");
 554         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
 555
 556         rc = qeth_query_setadapterparms(card);
 557         if (rc) {
 558                 QETH_DBF_MESSAGE(2, "could not query adapter parameters on "
 559                         "device %s: x%x\n", CARD_BUS_ID(card), rc);
 560         }
 561
 562         if ((card->info.type == QETH_CARD_TYPE_IQD) ||
 563             (card->info.guestlan)) {
 564                 rc = qeth_setadpparms_change_macaddr(card);
 565                 if (rc) {
 566                         QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
 567                                 "device %s: x%x\n", CARD_BUS_ID(card), rc);
 568                         QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 569                         return rc;
 570                 }
 571                 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN);
 572         } else {
 573                 random_ether_addr(card->dev->dev_addr);
 574                 memcpy(card->dev->dev_addr, vendor_pre, 3);
 575         }
 576         return 0;
 577 }
 578
 579 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 580 {
 581         struct sockaddr *addr = p;
 582         struct qeth_card *card = dev->ml_priv;
 583         int rc = 0;
 584
 585         QETH_DBF_TEXT(TRACE, 3, "setmac");
 586
 587         if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
 588                 QETH_DBF_TEXT(TRACE, 3, "setmcINV");
 589                 return -EOPNOTSUPP;
 590         }
 591
 592         if (card->info.type == QETH_CARD_TYPE_OSN) {
 593                 QETH_DBF_TEXT(TRACE, 3, "setmcOSN");
 594                 return -EOPNOTSUPP;
 595         }
 596         QETH_DBF_TEXT_(TRACE, 3, "%s", CARD_BUS_ID(card));
 597         QETH_DBF_HEX(TRACE, 3, addr->sa_data, OSA_ADDR_LEN);
 598         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 599                 QETH_DBF_TEXT(TRACE, 3, "setmcREC");
 600                 return -ERESTARTSYS;
 601         }
 602         rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
 603         if (!rc)
 604                 rc = qeth_l2_send_setmac(card, addr->sa_data);
 605         return rc;
 606 }
 607
 608 static void qeth_l2_set_multicast_list(struct net_device *dev)
 609 {
 610         struct qeth_card *card = dev->ml_priv;
 611         struct dev_addr_list *dm;
 612         struct netdev_hw_addr *ha;
 613
 614         if (card->info.type == QETH_CARD_TYPE_OSN)
 615                 return ;
 616
 617         QETH_DBF_TEXT(TRACE, 3, "setmulti");
 618         if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
 619             (card->state != CARD_STATE_UP))
 620                 return;
 621         qeth_l2_del_all_mc(card);
 622         spin_lock_bh(&card->mclock);
 623         for (dm = dev->mc_list; dm; dm = dm->next)
 624                 qeth_l2_add_mc(card, dm->da_addr, 0);
 625
 626         netdev_for_each_uc_addr(ha, dev)
 627                 qeth_l2_add_mc(card, ha->addr, 1);
 628
 629         spin_unlock_bh(&card->mclock);
 630         if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
 631                 return;
 632         qeth_setadp_promisc_mode(card);
 633 }
 634
 635 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 636 {
 637         int rc;
 638         struct qeth_hdr *hdr = NULL;
 639         int elements = 0;
 640         struct qeth_card *card = dev->ml_priv;
 641         struct sk_buff *new_skb = skb;
 642         int ipv = qeth_get_ip_version(skb);
 643         int cast_type = qeth_l2_get_cast_type(card, skb);
 644         struct qeth_qdio_out_q *queue = card->qdio.out_qs
 645                 [qeth_get_priority_queue(card, skb, ipv, cast_type)];
 646         int tx_bytes = skb->len;
 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 (card->info.type == QETH_CARD_TYPE_OSN)
 667                 hdr = (struct qeth_hdr *)skb->data;
 668         else {
 669                 if (card->info.type == QETH_CARD_TYPE_IQD) {
 670                         new_skb = skb;
 671                         data_offset = ETH_HLEN;
 672                         hd_len = ETH_HLEN;
 673                         hdr = kmem_cache_alloc(qeth_core_header_cache,
 674                                                 GFP_ATOMIC);
 675                         if (!hdr)
 676                                 goto tx_drop;
 677                         elements_needed++;
 678                         skb_reset_mac_header(new_skb);
 679                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 680                         hdr->hdr.l2.pkt_length = new_skb->len;
 681                         memcpy(((char *)hdr) + sizeof(struct qeth_hdr),
 682                                 skb_mac_header(new_skb), ETH_HLEN);
 683                 } else {
 684                         /* create a clone with writeable headroom */
 685                         new_skb = skb_realloc_headroom(skb,
 686                                                 sizeof(struct qeth_hdr));
 687                         if (!new_skb)
 688                                 goto tx_drop;
 689                         hdr = (struct qeth_hdr *)skb_push(new_skb,
 690                                                 sizeof(struct qeth_hdr));
 691                         skb_set_mac_header(new_skb, sizeof(struct qeth_hdr));
 692                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 693                 }
 694         }
 695
 696         elements = qeth_get_elements_no(card, (void *)hdr, new_skb,
 697                                                 elements_needed);
 698         if (!elements) {
 699                 if (data_offset >= 0)
 700                         kmem_cache_free(qeth_core_header_cache, hdr);
 701                 goto tx_drop;
 702         }
 703
 704         if (card->info.type != QETH_CARD_TYPE_IQD)
 705                 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
 706                                          elements);
 707         else
 708                 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
 709                                         elements, data_offset, hd_len);
 710         if (!rc) {
 711                 card->stats.tx_packets++;
 712                 card->stats.tx_bytes += tx_bytes;
 713                 if (new_skb != skb)
 714                         dev_kfree_skb_any(skb);
 715                 rc = NETDEV_TX_OK;
 716         } else {
 717                 if (data_offset >= 0)
 718                         kmem_cache_free(qeth_core_header_cache, hdr);
 719
 720                 if (rc == -EBUSY) {
 721                         if (new_skb != skb)
 722                                 dev_kfree_skb_any(new_skb);
 723                         return NETDEV_TX_BUSY;
 724                 } else
 725                         goto tx_drop;
 726         }
 727
 728         netif_wake_queue(dev);
 729         if (card->options.performance_stats)
 730                 card->perf_stats.outbound_time += qeth_get_micros() -
 731                         card->perf_stats.outbound_start_time;
 732         return rc;
 733
 734 tx_drop:
 735         card->stats.tx_dropped++;
 736         card->stats.tx_errors++;
 737         if ((new_skb != skb) && new_skb)
 738                 dev_kfree_skb_any(new_skb);
 739         dev_kfree_skb_any(skb);
 740         netif_wake_queue(dev);
 741         return NETDEV_TX_OK;
 742 }
 743
 744 static void qeth_l2_qdio_input_handler(struct ccw_device *ccwdev,
 745                         unsigned int qdio_err, unsigned int queue,
 746                         int first_element, int count, unsigned long card_ptr)
 747 {
 748         struct net_device *net_dev;
 749         struct qeth_card *card;
 750         struct qeth_qdio_buffer *buffer;
 751         int index;
 752         int i;
 753
 754         card = (struct qeth_card *) card_ptr;
 755         net_dev = card->dev;
 756         if (card->options.performance_stats) {
 757                 card->perf_stats.inbound_cnt++;
 758                 card->perf_stats.inbound_start_time = qeth_get_micros();
 759         }
 760         if (qdio_err & QDIO_ERROR_ACTIVATE_CHECK_CONDITION) {
 761                 QETH_DBF_TEXT(TRACE, 1, "qdinchk");
 762                 QETH_DBF_TEXT_(TRACE, 1, "%s", CARD_BUS_ID(card));
 763                 QETH_DBF_TEXT_(TRACE, 1, "%04X%04X", first_element,
 764                                 count);
 765                 QETH_DBF_TEXT_(TRACE, 1, "%04X", queue);
 766                 qeth_schedule_recovery(card);
 767                 return;
 768         }
 769         for (i = first_element; i < (first_element + count); ++i) {
 770                 index = i % QDIO_MAX_BUFFERS_PER_Q;
 771                 buffer = &card->qdio.in_q->bufs[index];
 772                 if (!(qdio_err &&
 773                       qeth_check_qdio_errors(card, buffer->buffer, qdio_err,
 774                                              "qinerr")))
 775                         qeth_l2_process_inbound_buffer(card, buffer, index);
 776                 /* clear buffer and give back to hardware */
 777                 qeth_put_buffer_pool_entry(card, buffer->pool_entry);
 778                 qeth_queue_input_buffer(card, index);
 779         }
 780         if (card->options.performance_stats)
 781                 card->perf_stats.inbound_time += qeth_get_micros() -
 782                         card->perf_stats.inbound_start_time;
 783 }
 784
 785 static int qeth_l2_open(struct net_device *dev)
 786 {
 787         struct qeth_card *card = dev->ml_priv;
 788
 789         QETH_DBF_TEXT(TRACE, 4, "qethopen");
 790         if (card->state != CARD_STATE_SOFTSETUP)
 791                 return -ENODEV;
 792
 793         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
 794              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
 795                 QETH_DBF_TEXT(TRACE, 4, "nomacadr");
 796                 return -EPERM;
 797         }
 798         card->data.state = CH_STATE_UP;
 799         card->state = CARD_STATE_UP;
 800         netif_start_queue(dev);
 801
 802         if (!card->lan_online && netif_carrier_ok(dev))
 803                 netif_carrier_off(dev);
 804         return 0;
 805 }
 806
 807
 808 static int qeth_l2_stop(struct net_device *dev)
 809 {
 810         struct qeth_card *card = dev->ml_priv;
 811
 812         QETH_DBF_TEXT(TRACE, 4, "qethstop");
 813         netif_tx_disable(dev);
 814         if (card->state == CARD_STATE_UP)
 815                 card->state = CARD_STATE_SOFTSETUP;
 816         return 0;
 817 }
 818
 819 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 820 {
 821         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 822
 823         INIT_LIST_HEAD(&card->vid_list);
 824         INIT_LIST_HEAD(&card->mc_list);
 825         card->options.layer2 = 1;
 826         card->discipline.input_handler = (qdio_handler_t *)
 827                 qeth_l2_qdio_input_handler;
 828         card->discipline.output_handler = (qdio_handler_t *)
 829                 qeth_qdio_output_handler;
 830         card->discipline.recover = qeth_l2_recover;
 831         return 0;
 832 }
 833
 834 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
 835 {
 836         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
 837
 838         qeth_set_allowed_threads(card, 0, 1);
 839         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 840
 841         if (cgdev->state == CCWGROUP_ONLINE) {
 842                 card->use_hard_stop = 1;
 843                 qeth_l2_set_offline(cgdev);
 844         }
 845
 846         if (card->dev) {
 847                 unregister_netdev(card->dev);
 848                 card->dev = NULL;
 849         }
 850
 851         qeth_l2_del_all_mc(card);
 852         return;
 853 }
 854
 855 static const struct ethtool_ops qeth_l2_ethtool_ops = {
 856         .get_link = ethtool_op_get_link,
 857         .get_strings = qeth_core_get_strings,
 858         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 859         .get_sset_count = qeth_core_get_sset_count,
 860         .get_drvinfo = qeth_core_get_drvinfo,
 861         .get_settings = qeth_core_ethtool_get_settings,
 862 };
 863
 864 static const struct ethtool_ops qeth_l2_osn_ops = {
 865         .get_strings = qeth_core_get_strings,
 866         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 867         .get_sset_count = qeth_core_get_sset_count,
 868         .get_drvinfo = qeth_core_get_drvinfo,
 869 };
 870
 871 static const struct net_device_ops qeth_l2_netdev_ops = {
 872         .ndo_open               = qeth_l2_open,
 873         .ndo_stop               = qeth_l2_stop,
 874         .ndo_get_stats          = qeth_get_stats,
 875         .ndo_start_xmit         = qeth_l2_hard_start_xmit,
 876         .ndo_validate_addr      = eth_validate_addr,
 877         .ndo_set_multicast_list = qeth_l2_set_multicast_list,
 878         .ndo_do_ioctl           = qeth_l2_do_ioctl,
 879         .ndo_set_mac_address    = qeth_l2_set_mac_address,
 880         .ndo_change_mtu         = qeth_change_mtu,
 881         .ndo_vlan_rx_add_vid    = qeth_l2_vlan_rx_add_vid,
 882         .ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,
 883         .ndo_tx_timeout         = qeth_tx_timeout,
 884 };
 885
 886 static int qeth_l2_setup_netdev(struct qeth_card *card)
 887 {
 888         switch (card->info.type) {
 889         case QETH_CARD_TYPE_OSAE:
 890                 card->dev = alloc_etherdev(0);
 891                 break;
 892         case QETH_CARD_TYPE_IQD:
 893                 card->dev = alloc_netdev(0, "hsi%d", ether_setup);
 894                 break;
 895         case QETH_CARD_TYPE_OSN:
 896                 card->dev = alloc_netdev(0, "osn%d", ether_setup);
 897                 card->dev->flags |= IFF_NOARP;
 898                 break;
 899         default:
 900                 card->dev = alloc_etherdev(0);
 901         }
 902
 903         if (!card->dev)
 904                 return -ENODEV;
 905
 906         card->dev->ml_priv = card;
 907         card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
 908         card->dev->mtu = card->info.initial_mtu;
 909         card->dev->netdev_ops = &qeth_l2_netdev_ops;
 910         if (card->info.type != QETH_CARD_TYPE_OSN)
 911                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops);
 912         else
 913                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops);
 914         card->dev->features |= NETIF_F_HW_VLAN_FILTER;
 915         card->info.broadcast_capable = 1;
 916         qeth_l2_request_initial_mac(card);
 917         SET_NETDEV_DEV(card->dev, &card->gdev->dev);
 918         return register_netdev(card->dev);
 919 }
 920
 921 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 922 {
 923         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 924         int rc = 0;
 925         enum qeth_card_states recover_flag;
 926
 927         BUG_ON(!card);
 928         QETH_DBF_TEXT(SETUP, 2, "setonlin");
 929         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 930
 931         recover_flag = card->state;
 932         rc = qeth_core_hardsetup_card(card);
 933         if (rc) {
 934                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
 935                 rc = -ENODEV;
 936                 goto out_remove;
 937         }
 938
 939         if (!card->dev && qeth_l2_setup_netdev(card)) {
 940                 rc = -ENODEV;
 941                 goto out_remove;
 942         }
 943
 944         if (card->info.type != QETH_CARD_TYPE_OSN)
 945                 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
 946
 947         card->state = CARD_STATE_HARDSETUP;
 948         qeth_print_status_message(card);
 949
 950         /* softsetup */
 951         QETH_DBF_TEXT(SETUP, 2, "softsetp");
 952
 953         rc = qeth_send_startlan(card);
 954         if (rc) {
 955                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 956                 if (rc == 0xe080) {
 957                         dev_warn(&card->gdev->dev,
 958                                 "The LAN is offline\n");
 959                         card->lan_online = 0;
 960                         return 0;
 961                 }
 962                 rc = -ENODEV;
 963                 goto out_remove;
 964         } else
 965                 card->lan_online = 1;
 966
 967         if (card->info.type != QETH_CARD_TYPE_OSN) {
 968                 /* configure isolation level */
 969                 qeth_set_access_ctrl_online(card);
 970                 qeth_l2_process_vlans(card, 0);
 971         }
 972
 973         netif_tx_disable(card->dev);
 974
 975         rc = qeth_init_qdio_queues(card);
 976         if (rc) {
 977                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
 978                 rc = -ENODEV;
 979                 goto out_remove;
 980         }
 981         card->state = CARD_STATE_SOFTSETUP;
 982         netif_carrier_on(card->dev);
 983
 984         qeth_set_allowed_threads(card, 0xffffffff, 0);
 985         if (recover_flag == CARD_STATE_RECOVER) {
 986                 if (recovery_mode &&
 987                     card->info.type != QETH_CARD_TYPE_OSN) {
 988                         qeth_l2_open(card->dev);
 989                 } else {
 990                         rtnl_lock();
 991                         dev_open(card->dev);
 992                         rtnl_unlock();
 993                 }
 994                 /* this also sets saved unicast addresses */
 995                 qeth_l2_set_multicast_list(card->dev);
 996         }
 997         /* let user_space know that device is online */
 998         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
 999         return 0;
1000
1001 out_remove:
1002         card->use_hard_stop = 1;
1003         qeth_l2_stop_card(card, 0);
1004         ccw_device_set_offline(CARD_DDEV(card));
1005         ccw_device_set_offline(CARD_WDEV(card));
1006         ccw_device_set_offline(CARD_RDEV(card));
1007         if (recover_flag == CARD_STATE_RECOVER)
1008                 card->state = CARD_STATE_RECOVER;
1009         else
1010                 card->state = CARD_STATE_DOWN;
1011         return rc;
1012 }
1013
1014 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1015 {
1016         return __qeth_l2_set_online(gdev, 0);
1017 }
1018
1019 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1020                                         int recovery_mode)
1021 {
1022         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1023         int rc = 0, rc2 = 0, rc3 = 0;
1024         enum qeth_card_states recover_flag;
1025
1026         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1027         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1028
1029         if (card->dev && netif_carrier_ok(card->dev))
1030                 netif_carrier_off(card->dev);
1031         recover_flag = card->state;
1032         qeth_l2_stop_card(card, recovery_mode);
1033         rc  = ccw_device_set_offline(CARD_DDEV(card));
1034         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1035         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1036         if (!rc)
1037                 rc = (rc2) ? rc2 : rc3;
1038         if (rc)
1039                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1040         if (recover_flag == CARD_STATE_UP)
1041                 card->state = CARD_STATE_RECOVER;
1042         /* let user_space know that device is offline */
1043         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1044         return 0;
1045 }
1046
1047 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1048 {
1049         return __qeth_l2_set_offline(cgdev, 0);
1050 }
1051
1052 static int qeth_l2_recover(void *ptr)
1053 {
1054         struct qeth_card *card;
1055         int rc = 0;
1056
1057         card = (struct qeth_card *) ptr;
1058         QETH_DBF_TEXT(TRACE, 2, "recover1");
1059         QETH_DBF_HEX(TRACE, 2, &card, sizeof(void *));
1060         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1061                 return 0;
1062         QETH_DBF_TEXT(TRACE, 2, "recover2");
1063         dev_warn(&card->gdev->dev,
1064                 "A recovery process has been started for the device\n");
1065         card->use_hard_stop = 1;
1066         __qeth_l2_set_offline(card->gdev, 1);
1067         rc = __qeth_l2_set_online(card->gdev, 1);
1068         /* don't run another scheduled recovery */
1069         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1070         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1071         if (!rc)
1072                 dev_info(&card->gdev->dev,
1073                         "Device successfully recovered!\n");
1074         else {
1075                 rtnl_lock();
1076                 dev_close(card->dev);
1077                 rtnl_unlock();
1078                 dev_warn(&card->gdev->dev, "The qeth device driver "
1079                         "failed to recover an error on the device\n");
1080         }
1081         return 0;
1082 }
1083
1084 static int __init qeth_l2_init(void)
1085 {
1086         pr_info("register layer 2 discipline\n");
1087         return 0;
1088 }
1089
1090 static void __exit qeth_l2_exit(void)
1091 {
1092         pr_info("unregister layer 2 discipline\n");
1093 }
1094
1095 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1096 {
1097         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1098         qeth_qdio_clear_card(card, 0);
1099         qeth_clear_qdio_buffers(card);
1100 }
1101
1102 static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev)
1103 {
1104         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1105
1106         if (card->dev)
1107                 netif_device_detach(card->dev);
1108         qeth_set_allowed_threads(card, 0, 1);
1109         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1110         if (gdev->state == CCWGROUP_OFFLINE)
1111                 return 0;
1112         if (card->state == CARD_STATE_UP) {
1113                 card->use_hard_stop = 1;
1114                 __qeth_l2_set_offline(card->gdev, 1);
1115         } else
1116                 __qeth_l2_set_offline(card->gdev, 0);
1117         return 0;
1118 }
1119
1120 static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
1121 {
1122         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1123         int rc = 0;
1124
1125         if (gdev->state == CCWGROUP_OFFLINE)
1126                 goto out;
1127
1128         if (card->state == CARD_STATE_RECOVER) {
1129                 rc = __qeth_l2_set_online(card->gdev, 1);
1130                 if (rc) {
1131                         rtnl_lock();
1132                         dev_close(card->dev);
1133                         rtnl_unlock();
1134                 }
1135         } else
1136                 rc = __qeth_l2_set_online(card->gdev, 0);
1137 out:
1138         qeth_set_allowed_threads(card, 0xffffffff, 0);
1139         if (card->dev)
1140                 netif_device_attach(card->dev);
1141         if (rc)
1142                 dev_warn(&card->gdev->dev, "The qeth device driver "
1143                         "failed to recover an error on the device\n");
1144         return rc;
1145 }
1146
1147 struct ccwgroup_driver qeth_l2_ccwgroup_driver = {
1148         .probe = qeth_l2_probe_device,
1149         .remove = qeth_l2_remove_device,
1150         .set_online = qeth_l2_set_online,
1151         .set_offline = qeth_l2_set_offline,
1152         .shutdown = qeth_l2_shutdown,
1153         .freeze = qeth_l2_pm_suspend,
1154         .thaw = qeth_l2_pm_resume,
1155         .restore = qeth_l2_pm_resume,
1156 };
1157 EXPORT_SYMBOL_GPL(qeth_l2_ccwgroup_driver);
1158
1159 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1160                            struct qeth_cmd_buffer *iob)
1161 {
1162         unsigned long flags;
1163         int rc = 0;
1164
1165         QETH_DBF_TEXT(TRACE, 5, "osndctrd");
1166
1167         wait_event(card->wait_q,
1168                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1169         qeth_prepare_control_data(card, len, iob);
1170         QETH_DBF_TEXT(TRACE, 6, "osnoirqp");
1171         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1172         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1173                               (addr_t) iob, 0, 0);
1174         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1175         if (rc) {
1176                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1177                            "ccw_device_start rc = %i\n", rc);
1178                 QETH_DBF_TEXT_(TRACE, 2, " err%d", rc);
1179                 qeth_release_buffer(iob->channel, iob);
1180                 atomic_set(&card->write.irq_pending, 0);
1181                 wake_up(&card->wait_q);
1182         }
1183         return rc;
1184 }
1185
1186 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1187                         struct qeth_cmd_buffer *iob, int data_len)
1188 {
1189         u16 s1, s2;
1190
1191         QETH_DBF_TEXT(TRACE, 4, "osndipa");
1192
1193         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1194         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1195         s2 = (u16)data_len;
1196         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1197         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1198         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1199         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1200         return qeth_osn_send_control_data(card, s1, iob);
1201 }
1202
1203 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1204 {
1205         struct qeth_cmd_buffer *iob;
1206         struct qeth_card *card;
1207         int rc;
1208
1209         QETH_DBF_TEXT(TRACE, 2, "osnsdmc");
1210         if (!dev)
1211                 return -ENODEV;
1212         card = dev->ml_priv;
1213         if (!card)
1214                 return -ENODEV;
1215         if ((card->state != CARD_STATE_UP) &&
1216             (card->state != CARD_STATE_SOFTSETUP))
1217                 return -ENODEV;
1218         iob = qeth_wait_for_buffer(&card->write);
1219         memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1220         rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1221         return rc;
1222 }
1223 EXPORT_SYMBOL(qeth_osn_assist);
1224
1225 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1226                   int (*assist_cb)(struct net_device *, void *),
1227                   int (*data_cb)(struct sk_buff *))
1228 {
1229         struct qeth_card *card;
1230
1231         QETH_DBF_TEXT(TRACE, 2, "osnreg");
1232         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1233         if (*dev == NULL)
1234                 return -ENODEV;
1235         card = (*dev)->ml_priv;
1236         if (!card)
1237                 return -ENODEV;
1238         if ((assist_cb == NULL) || (data_cb == NULL))
1239                 return -EINVAL;
1240         card->osn_info.assist_cb = assist_cb;
1241         card->osn_info.data_cb = data_cb;
1242         return 0;
1243 }
1244 EXPORT_SYMBOL(qeth_osn_register);
1245
1246 void qeth_osn_deregister(struct net_device *dev)
1247 {
1248         struct qeth_card *card;
1249
1250         QETH_DBF_TEXT(TRACE, 2, "osndereg");
1251         if (!dev)
1252                 return;
1253         card = dev->ml_priv;
1254         if (!card)
1255                 return;
1256         card->osn_info.assist_cb = NULL;
1257         card->osn_info.data_cb = NULL;
1258         return;
1259 }
1260 EXPORT_SYMBOL(qeth_osn_deregister);
1261
1262 module_init(qeth_l2_init);
1263 module_exit(qeth_l2_exit);
1264 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1265 MODULE_DESCRIPTION("qeth layer 2 discipline");
1266 MODULE_LICENSE("GPL");