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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/etherdevice.h>
  20 #include <linux/mii.h>
  21 #include <linux/ip.h>
  22 #include <linux/list.h>
  23
  24 #include "qeth_core.h"
  25
  26 static int qeth_l2_set_offline(struct ccwgroup_device *);
  27 static int qeth_l2_stop(struct net_device *);
  28 static int qeth_l2_send_delmac(struct qeth_card *, __u8 *);
  29 static int qeth_l2_send_setdelmac(struct qeth_card *, __u8 *,
  30                            enum qeth_ipa_cmds,
  31                            int (*reply_cb) (struct qeth_card *,
  32                                             struct qeth_reply*,
  33                                             unsigned long));
  34 static void qeth_l2_set_multicast_list(struct net_device *);
  35 static int qeth_l2_recover(void *);
  36
  37 static int qeth_l2_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
  38 {
  39         struct qeth_card *card = dev->ml_priv;
  40         struct mii_ioctl_data *mii_data;
  41         int rc = 0;
  42
  43         if (!card)
  44                 return -ENODEV;
  45
  46         if ((card->state != CARD_STATE_UP) &&
  47                 (card->state != CARD_STATE_SOFTSETUP))
  48                 return -ENODEV;
  49
  50         if (card->info.type == QETH_CARD_TYPE_OSN)
  51                 return -EPERM;
  52
  53         switch (cmd) {
  54         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
  55                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
  56                 break;
  57         case SIOC_QETH_GET_CARD_TYPE:
  58                 if ((card->info.type == QETH_CARD_TYPE_OSAE) &&
  59                     !card->info.guestlan)
  60                         return 1;
  61                 return 0;
  62                 break;
  63         case SIOCGMIIPHY:
  64                 mii_data = if_mii(rq);
  65                 mii_data->phy_id = 0;
  66                 break;
  67         case SIOCGMIIREG:
  68                 mii_data = if_mii(rq);
  69                 if (mii_data->phy_id != 0)
  70                         rc = -EINVAL;
  71                 else
  72                         mii_data->val_out = qeth_mdio_read(dev,
  73                                 mii_data->phy_id, mii_data->reg_num);
  74                 break;
  75         default:
  76                 rc = -EOPNOTSUPP;
  77         }
  78         if (rc)
  79                 QETH_DBF_TEXT_(TRACE, 2, "ioce%d", rc);
  80         return rc;
  81 }
  82
  83 static int qeth_l2_verify_dev(struct net_device *dev)
  84 {
  85         struct qeth_card *card;
  86         unsigned long flags;
  87         int rc = 0;
  88
  89         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
  90         list_for_each_entry(card, &qeth_core_card_list.list, list) {
  91                 if (card->dev == dev) {
  92                         rc = QETH_REAL_CARD;
  93                         break;
  94                 }
  95         }
  96         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
  97
  98         return rc;
  99 }
 100
 101 static struct net_device *qeth_l2_netdev_by_devno(unsigned char *read_dev_no)
 102 {
 103         struct qeth_card *card;
 104         struct net_device *ndev;
 105         __u16 temp_dev_no;
 106         unsigned long flags;
 107         struct ccw_dev_id read_devid;
 108
 109         ndev = NULL;
 110         memcpy(&temp_dev_no, read_dev_no, 2);
 111         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
 112         list_for_each_entry(card, &qeth_core_card_list.list, list) {
 113                 ccw_device_get_id(CARD_RDEV(card), &read_devid);
 114                 if (read_devid.devno == temp_dev_no) {
 115                         ndev = card->dev;
 116                         break;
 117                 }
 118         }
 119         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
 120         return ndev;
 121 }
 122
 123 static int qeth_l2_send_setgroupmac_cb(struct qeth_card *card,
 124                                 struct qeth_reply *reply,
 125                                 unsigned long data)
 126 {
 127         struct qeth_ipa_cmd *cmd;
 128         __u8 *mac;
 129
 130         QETH_DBF_TEXT(TRACE, 2, "L2Sgmacb");
 131         cmd = (struct qeth_ipa_cmd *) data;
 132         mac = &cmd->data.setdelmac.mac[0];
 133         /* MAC already registered, needed in couple/uncouple case */
 134         if (cmd->hdr.return_code ==  IPA_RC_L2_DUP_MAC) {
 135                 QETH_DBF_MESSAGE(2, "Group MAC %pM already existing on %s \n",
 136                           mac, QETH_CARD_IFNAME(card));
 137                 cmd->hdr.return_code = 0;
 138         }
 139         if (cmd->hdr.return_code)
 140                 QETH_DBF_MESSAGE(2, "Could not set group MAC %pM on %s: %x\n",
 141                           mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 142         return 0;
 143 }
 144
 145 static int qeth_l2_send_setgroupmac(struct qeth_card *card, __u8 *mac)
 146 {
 147         QETH_DBF_TEXT(TRACE, 2, "L2Sgmac");
 148         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETGMAC,
 149                                           qeth_l2_send_setgroupmac_cb);
 150 }
 151
 152 static int qeth_l2_send_delgroupmac_cb(struct qeth_card *card,
 153                                 struct qeth_reply *reply,
 154                                 unsigned long data)
 155 {
 156         struct qeth_ipa_cmd *cmd;
 157         __u8 *mac;
 158
 159         QETH_DBF_TEXT(TRACE, 2, "L2Dgmacb");
 160         cmd = (struct qeth_ipa_cmd *) data;
 161         mac = &cmd->data.setdelmac.mac[0];
 162         if (cmd->hdr.return_code)
 163                 QETH_DBF_MESSAGE(2, "Could not delete group MAC %pM on %s: %x\n",
 164                           mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 165         return 0;
 166 }
 167
 168 static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac)
 169 {
 170         QETH_DBF_TEXT(TRACE, 2, "L2Dgmac");
 171         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELGMAC,
 172                                           qeth_l2_send_delgroupmac_cb);
 173 }
 174
 175 static void qeth_l2_add_mc(struct qeth_card *card, __u8 *mac, int vmac)
 176 {
 177         struct qeth_mc_mac *mc;
 178         int rc;
 179
 180         mc = kmalloc(sizeof(struct qeth_mc_mac), GFP_ATOMIC);
 181
 182         if (!mc)
 183                 return;
 184
 185         memcpy(mc->mc_addr, mac, OSA_ADDR_LEN);
 186         mc->mc_addrlen = OSA_ADDR_LEN;
 187         mc->is_vmac = vmac;
 188
 189         if (vmac) {
 190                 rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
 191                                         NULL);
 192         } else {
 193                 rc = qeth_l2_send_setgroupmac(card, mac);
 194         }
 195
 196         if (!rc)
 197                 list_add_tail(&mc->list, &card->mc_list);
 198         else
 199                 kfree(mc);
 200 }
 201
 202 static void qeth_l2_del_all_mc(struct qeth_card *card)
 203 {
 204         struct qeth_mc_mac *mc, *tmp;
 205
 206         spin_lock_bh(&card->mclock);
 207         list_for_each_entry_safe(mc, tmp, &card->mc_list, list) {
 208                 if (mc->is_vmac)
 209                         qeth_l2_send_setdelmac(card, mc->mc_addr,
 210                                         IPA_CMD_DELVMAC, NULL);
 211                 else
 212                         qeth_l2_send_delgroupmac(card, mc->mc_addr);
 213                 list_del(&mc->list);
 214                 kfree(mc);
 215         }
 216         spin_unlock_bh(&card->mclock);
 217 }
 218
 219 static inline int qeth_l2_get_cast_type(struct qeth_card *card,
 220                         struct sk_buff *skb)
 221 {
 222         if (card->info.type == QETH_CARD_TYPE_OSN)
 223                 return RTN_UNSPEC;
 224         if (is_broadcast_ether_addr(skb->data))
 225                 return RTN_BROADCAST;
 226         if (is_multicast_ether_addr(skb->data))
 227                 return RTN_MULTICAST;
 228         return RTN_UNSPEC;
 229 }
 230
 231 static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
 232                         struct sk_buff *skb, int ipv, int cast_type)
 233 {
 234         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
 235
 236         memset(hdr, 0, sizeof(struct qeth_hdr));
 237         hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
 238
 239         /* set byte byte 3 to casting flags */
 240         if (cast_type == RTN_MULTICAST)
 241                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 242         else if (cast_type == RTN_BROADCAST)
 243                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 244         else
 245                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 246
 247         hdr->hdr.l2.pkt_length = skb->len-QETH_HEADER_SIZE;
 248         /* VSWITCH relies on the VLAN
 249          * information to be present in
 250          * the QDIO header */
 251         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
 252                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
 253                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
 254         }
 255 }
 256
 257 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
 258                         struct qeth_reply *reply, unsigned long data)
 259 {
 260         struct qeth_ipa_cmd *cmd;
 261
 262         QETH_DBF_TEXT(TRACE, 2, "L2sdvcb");
 263         cmd = (struct qeth_ipa_cmd *) data;
 264         if (cmd->hdr.return_code) {
 265                 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x. "
 266                           "Continuing\n", cmd->data.setdelvlan.vlan_id,
 267                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 268                 QETH_DBF_TEXT_(TRACE, 2, "L2VL%4x", cmd->hdr.command);
 269                 QETH_DBF_TEXT_(TRACE, 2, "L2%s", CARD_BUS_ID(card));
 270                 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
 271         }
 272         return 0;
 273 }
 274
 275 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
 276                                 enum qeth_ipa_cmds ipacmd)
 277 {
 278         struct qeth_ipa_cmd *cmd;
 279         struct qeth_cmd_buffer *iob;
 280
 281         QETH_DBF_TEXT_(TRACE, 4, "L2sdv%x", ipacmd);
 282         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 283         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 284         cmd->data.setdelvlan.vlan_id = i;
 285         return qeth_send_ipa_cmd(card, iob,
 286                                  qeth_l2_send_setdelvlan_cb, NULL);
 287 }
 288
 289 static void qeth_l2_process_vlans(struct qeth_card *card, int clear)
 290 {
 291         struct qeth_vlan_vid *id;
 292         QETH_DBF_TEXT(TRACE, 3, "L2prcvln");
 293         spin_lock_bh(&card->vlanlock);
 294         list_for_each_entry(id, &card->vid_list, list) {
 295                 if (clear)
 296                         qeth_l2_send_setdelvlan(card, id->vid,
 297                                 IPA_CMD_DELVLAN);
 298                 else
 299                         qeth_l2_send_setdelvlan(card, id->vid,
 300                                 IPA_CMD_SETVLAN);
 301         }
 302         spin_unlock_bh(&card->vlanlock);
 303 }
 304
 305 static void qeth_l2_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
 306 {
 307         struct qeth_card *card = dev->ml_priv;
 308         struct qeth_vlan_vid *id;
 309
 310         QETH_DBF_TEXT_(TRACE, 4, "aid:%d", vid);
 311         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 312                 QETH_DBF_TEXT(TRACE, 3, "aidREC");
 313                 return;
 314         }
 315         id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
 316         if (id) {
 317                 id->vid = vid;
 318                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
 319                 spin_lock_bh(&card->vlanlock);
 320                 list_add_tail(&id->list, &card->vid_list);
 321                 spin_unlock_bh(&card->vlanlock);
 322         }
 323 }
 324
 325 static void qeth_l2_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
 326 {
 327         struct qeth_vlan_vid *id, *tmpid = NULL;
 328         struct qeth_card *card = dev->ml_priv;
 329
 330         QETH_DBF_TEXT_(TRACE, 4, "kid:%d", vid);
 331         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 332                 QETH_DBF_TEXT(TRACE, 3, "kidREC");
 333                 return;
 334         }
 335         spin_lock_bh(&card->vlanlock);
 336         list_for_each_entry(id, &card->vid_list, list) {
 337                 if (id->vid == vid) {
 338                         list_del(&id->list);
 339                         tmpid = id;
 340                         break;
 341                 }
 342         }
 343         spin_unlock_bh(&card->vlanlock);
 344         if (tmpid) {
 345                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 346                 kfree(tmpid);
 347         }
 348         qeth_l2_set_multicast_list(card->dev);
 349 }
 350
 351 static int qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
 352 {
 353         int rc = 0;
 354
 355         QETH_DBF_TEXT(SETUP , 2, "stopcard");
 356         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 357
 358         qeth_set_allowed_threads(card, 0, 1);
 359         if (card->read.state == CH_STATE_UP &&
 360             card->write.state == CH_STATE_UP &&
 361             (card->state == CARD_STATE_UP)) {
 362                 if (recovery_mode &&
 363                     card->info.type != QETH_CARD_TYPE_OSN) {
 364                         qeth_l2_stop(card->dev);
 365                 } else {
 366                         rtnl_lock();
 367                         dev_close(card->dev);
 368                         rtnl_unlock();
 369                 }
 370                 if (!card->use_hard_stop ||
 371                         recovery_mode) {
 372                         __u8 *mac = &card->dev->dev_addr[0];
 373                         rc = qeth_l2_send_delmac(card, mac);
 374                         QETH_DBF_TEXT_(SETUP, 2, "Lerr%d", rc);
 375                 }
 376                 card->state = CARD_STATE_SOFTSETUP;
 377         }
 378         if (card->state == CARD_STATE_SOFTSETUP) {
 379                 qeth_l2_process_vlans(card, 1);
 380                 if (!card->use_hard_stop ||
 381                         recovery_mode)
 382                         qeth_l2_del_all_mc(card);
 383                 qeth_clear_ipacmd_list(card);
 384                 card->state = CARD_STATE_HARDSETUP;
 385         }
 386         if (card->state == CARD_STATE_HARDSETUP) {
 387                 qeth_qdio_clear_card(card, 0);
 388                 qeth_clear_qdio_buffers(card);
 389                 qeth_clear_working_pool_list(card);
 390                 card->state = CARD_STATE_DOWN;
 391         }
 392         if (card->state == CARD_STATE_DOWN) {
 393                 qeth_clear_cmd_buffers(&card->read);
 394                 qeth_clear_cmd_buffers(&card->write);
 395         }
 396         card->use_hard_stop = 0;
 397         return rc;
 398 }
 399
 400 static void qeth_l2_process_inbound_buffer(struct qeth_card *card,
 401                             struct qeth_qdio_buffer *buf, int index)
 402 {
 403         struct qdio_buffer_element *element;
 404         struct sk_buff *skb;
 405         struct qeth_hdr *hdr;
 406         int offset;
 407         unsigned int len;
 408
 409         /* get first element of current buffer */
 410         element = (struct qdio_buffer_element *)&buf->buffer->element[0];
 411         offset = 0;
 412         if (card->options.performance_stats)
 413                 card->perf_stats.bufs_rec++;
 414         while ((skb = qeth_core_get_next_skb(card, buf->buffer, &element,
 415                                        &offset, &hdr))) {
 416                 skb->dev = card->dev;
 417                 /* is device UP ? */
 418                 if (!(card->dev->flags & IFF_UP)) {
 419                         dev_kfree_skb_any(skb);
 420                         continue;
 421                 }
 422
 423                 switch (hdr->hdr.l2.id) {
 424                 case QETH_HEADER_TYPE_LAYER2:
 425                         skb->pkt_type = PACKET_HOST;
 426                         skb->protocol = eth_type_trans(skb, skb->dev);
 427                         if (card->options.checksum_type == NO_CHECKSUMMING)
 428                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 429                         else
 430                                 skb->ip_summed = CHECKSUM_NONE;
 431                         if (skb->protocol == htons(ETH_P_802_2))
 432                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
 433                         len = skb->len;
 434                         netif_rx(skb);
 435                         break;
 436                 case QETH_HEADER_TYPE_OSN:
 437                         if (card->info.type == QETH_CARD_TYPE_OSN) {
 438                                 skb_push(skb, sizeof(struct qeth_hdr));
 439                                 skb_copy_to_linear_data(skb, hdr,
 440                                                 sizeof(struct qeth_hdr));
 441                                 len = skb->len;
 442                                 card->osn_info.data_cb(skb);
 443                                 break;
 444                         }
 445                         /* else unknown */
 446                 default:
 447                         dev_kfree_skb_any(skb);
 448                         QETH_DBF_TEXT(TRACE, 3, "inbunkno");
 449                         QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
 450                         continue;
 451                 }
 452                 card->stats.rx_packets++;
 453                 card->stats.rx_bytes += len;
 454         }
 455 }
 456
 457 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
 458                            enum qeth_ipa_cmds ipacmd,
 459                            int (*reply_cb) (struct qeth_card *,
 460                                             struct qeth_reply*,
 461                                             unsigned long))
 462 {
 463         struct qeth_ipa_cmd *cmd;
 464         struct qeth_cmd_buffer *iob;
 465
 466         QETH_DBF_TEXT(TRACE, 2, "L2sdmac");
 467         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 468         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 469         cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
 470         memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
 471         return qeth_send_ipa_cmd(card, iob, reply_cb, NULL);
 472 }
 473
 474 static int qeth_l2_send_setmac_cb(struct qeth_card *card,
 475                            struct qeth_reply *reply,
 476                            unsigned long data)
 477 {
 478         struct qeth_ipa_cmd *cmd;
 479
 480         QETH_DBF_TEXT(TRACE, 2, "L2Smaccb");
 481         cmd = (struct qeth_ipa_cmd *) data;
 482         if (cmd->hdr.return_code) {
 483                 QETH_DBF_TEXT_(TRACE, 2, "L2er%x", cmd->hdr.return_code);
 484                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 485                 switch (cmd->hdr.return_code) {
 486                 case IPA_RC_L2_DUP_MAC:
 487                 case IPA_RC_L2_DUP_LAYER3_MAC:
 488                         dev_warn(&card->gdev->dev,
 489                                 "MAC address %pM already exists\n",
 490                                 card->dev->dev_addr);
 491                         break;
 492                 case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
 493                 case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
 494                         dev_warn(&card->gdev->dev,
 495                                 "MAC address %pM is not authorized\n",
 496                                 card->dev->dev_addr);
 497                         break;
 498                 default:
 499                         break;
 500                 }
 501                 cmd->hdr.return_code = -EIO;
 502         } else {
 503                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 504                 memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
 505                        OSA_ADDR_LEN);
 506                 dev_info(&card->gdev->dev,
 507                         "MAC address %pM successfully registered on device %s\n",
 508                         card->dev->dev_addr, card->dev->name);
 509         }
 510         return 0;
 511 }
 512
 513 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
 514 {
 515         QETH_DBF_TEXT(TRACE, 2, "L2Setmac");
 516         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
 517                                           qeth_l2_send_setmac_cb);
 518 }
 519
 520 static int qeth_l2_send_delmac_cb(struct qeth_card *card,
 521                            struct qeth_reply *reply,
 522                            unsigned long data)
 523 {
 524         struct qeth_ipa_cmd *cmd;
 525
 526         QETH_DBF_TEXT(TRACE, 2, "L2Dmaccb");
 527         cmd = (struct qeth_ipa_cmd *) data;
 528         if (cmd->hdr.return_code) {
 529                 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
 530                 cmd->hdr.return_code = -EIO;
 531                 return 0;
 532         }
 533         card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 534
 535         return 0;
 536 }
 537
 538 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
 539 {
 540         QETH_DBF_TEXT(TRACE, 2, "L2Delmac");
 541         if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
 542                 return 0;
 543         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
 544                                           qeth_l2_send_delmac_cb);
 545 }
 546
 547 static int qeth_l2_request_initial_mac(struct qeth_card *card)
 548 {
 549         int rc = 0;
 550         char vendor_pre[] = {0x02, 0x00, 0x00};
 551
 552         QETH_DBF_TEXT(SETUP, 2, "doL2init");
 553         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
 554
 555         rc = qeth_query_setadapterparms(card);
 556         if (rc) {
 557                 QETH_DBF_MESSAGE(2, "could not query adapter parameters on "
 558                         "device %s: x%x\n", CARD_BUS_ID(card), rc);
 559         }
 560
 561         if ((card->info.type == QETH_CARD_TYPE_IQD) ||
 562             (card->info.guestlan)) {
 563                 rc = qeth_setadpparms_change_macaddr(card);
 564                 if (rc) {
 565                         QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
 566                                 "device %s: x%x\n", CARD_BUS_ID(card), rc);
 567                         QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 568                         return rc;
 569                 }
 570                 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN);
 571         } else {
 572                 random_ether_addr(card->dev->dev_addr);
 573                 memcpy(card->dev->dev_addr, vendor_pre, 3);
 574         }
 575         return 0;
 576 }
 577
 578 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 579 {
 580         struct sockaddr *addr = p;
 581         struct qeth_card *card = dev->ml_priv;
 582         int rc = 0;
 583
 584         QETH_DBF_TEXT(TRACE, 3, "setmac");
 585
 586         if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
 587                 QETH_DBF_TEXT(TRACE, 3, "setmcINV");
 588                 return -EOPNOTSUPP;
 589         }
 590
 591         if (card->info.type == QETH_CARD_TYPE_OSN) {
 592                 QETH_DBF_TEXT(TRACE, 3, "setmcOSN");
 593                 return -EOPNOTSUPP;
 594         }
 595         QETH_DBF_TEXT_(TRACE, 3, "%s", CARD_BUS_ID(card));
 596         QETH_DBF_HEX(TRACE, 3, addr->sa_data, OSA_ADDR_LEN);
 597         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 598                 QETH_DBF_TEXT(TRACE, 3, "setmcREC");
 599                 return -ERESTARTSYS;
 600         }
 601         rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
 602         if (!rc)
 603                 rc = qeth_l2_send_setmac(card, addr->sa_data);
 604         return rc;
 605 }
 606
 607 static void qeth_l2_set_multicast_list(struct net_device *dev)
 608 {
 609         struct qeth_card *card = dev->ml_priv;
 610         struct dev_addr_list *dm;
 611         struct netdev_hw_addr *ha;
 612
 613         if (card->info.type == QETH_CARD_TYPE_OSN)
 614                 return ;
 615
 616         QETH_DBF_TEXT(TRACE, 3, "setmulti");
 617         if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
 618             (card->state != CARD_STATE_UP))
 619                 return;
 620         qeth_l2_del_all_mc(card);
 621         spin_lock_bh(&card->mclock);
 622         for (dm = dev->mc_list; dm; dm = dm->next)
 623                 qeth_l2_add_mc(card, dm->da_addr, 0);
 624
 625         list_for_each_entry(ha, &dev->uc.list, list)
 626                 qeth_l2_add_mc(card, ha->addr, 1);
 627
 628         spin_unlock_bh(&card->mclock);
 629         if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
 630                 return;
 631         qeth_setadp_promisc_mode(card);
 632 }
 633
 634 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 635 {
 636         int rc;
 637         struct qeth_hdr *hdr = NULL;
 638         int elements = 0;
 639         struct qeth_card *card = dev->ml_priv;
 640         struct sk_buff *new_skb = skb;
 641         int ipv = qeth_get_ip_version(skb);
 642         int cast_type = qeth_l2_get_cast_type(card, skb);
 643         struct qeth_qdio_out_q *queue = card->qdio.out_qs
 644                 [qeth_get_priority_queue(card, skb, ipv, cast_type)];
 645         int tx_bytes = skb->len;
 646         int data_offset = -1;
 647         int elements_needed = 0;
 648         int hd_len = 0;
 649
 650         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
 651                 card->stats.tx_carrier_errors++;
 652                 goto tx_drop;
 653         }
 654
 655         if ((card->info.type == QETH_CARD_TYPE_OSN) &&
 656             (skb->protocol == htons(ETH_P_IPV6)))
 657                 goto tx_drop;
 658
 659         if (card->options.performance_stats) {
 660                 card->perf_stats.outbound_cnt++;
 661                 card->perf_stats.outbound_start_time = qeth_get_micros();
 662         }
 663         netif_stop_queue(dev);
 664
 665         if (card->info.type == QETH_CARD_TYPE_OSN)
 666                 hdr = (struct qeth_hdr *)skb->data;
 667         else {
 668                 if (card->info.type == QETH_CARD_TYPE_IQD) {
 669                         new_skb = skb;
 670                         data_offset = ETH_HLEN;
 671                         hd_len = ETH_HLEN;
 672                         hdr = kmem_cache_alloc(qeth_core_header_cache,
 673                                                 GFP_ATOMIC);
 674                         if (!hdr)
 675                                 goto tx_drop;
 676                         elements_needed++;
 677                         skb_reset_mac_header(new_skb);
 678                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 679                         hdr->hdr.l2.pkt_length = new_skb->len;
 680                         memcpy(((char *)hdr) + sizeof(struct qeth_hdr),
 681                                 skb_mac_header(new_skb), ETH_HLEN);
 682                 } else {
 683                         /* create a clone with writeable headroom */
 684                         new_skb = skb_realloc_headroom(skb,
 685                                                 sizeof(struct qeth_hdr));
 686                         if (!new_skb)
 687                                 goto tx_drop;
 688                         hdr = (struct qeth_hdr *)skb_push(new_skb,
 689                                                 sizeof(struct qeth_hdr));
 690                         skb_set_mac_header(new_skb, sizeof(struct qeth_hdr));
 691                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 692                 }
 693         }
 694
 695         elements = qeth_get_elements_no(card, (void *)hdr, new_skb,
 696                                                 elements_needed);
 697         if (!elements) {
 698                 if (data_offset >= 0)
 699                         kmem_cache_free(qeth_core_header_cache, hdr);
 700                 goto tx_drop;
 701         }
 702
 703         if (card->info.type != QETH_CARD_TYPE_IQD)
 704                 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
 705                                          elements);
 706         else
 707                 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
 708                                         elements, data_offset, hd_len);
 709         if (!rc) {
 710                 card->stats.tx_packets++;
 711                 card->stats.tx_bytes += tx_bytes;
 712                 if (new_skb != skb)
 713                         dev_kfree_skb_any(skb);
 714                 rc = NETDEV_TX_OK;
 715         } else {
 716                 if (data_offset >= 0)
 717                         kmem_cache_free(qeth_core_header_cache, hdr);
 718
 719                 if (rc == -EBUSY) {
 720                         if (new_skb != skb)
 721                                 dev_kfree_skb_any(new_skb);
 722                         return NETDEV_TX_BUSY;
 723                 } else
 724                         goto tx_drop;
 725         }
 726
 727         netif_wake_queue(dev);
 728         if (card->options.performance_stats)
 729                 card->perf_stats.outbound_time += qeth_get_micros() -
 730                         card->perf_stats.outbound_start_time;
 731         return rc;
 732
 733 tx_drop:
 734         card->stats.tx_dropped++;
 735         card->stats.tx_errors++;
 736         if ((new_skb != skb) && new_skb)
 737                 dev_kfree_skb_any(new_skb);
 738         dev_kfree_skb_any(skb);
 739         netif_wake_queue(dev);
 740         return NETDEV_TX_OK;
 741 }
 742
 743 static void qeth_l2_qdio_input_handler(struct ccw_device *ccwdev,
 744                         unsigned int qdio_err, unsigned int queue,
 745                         int first_element, int count, unsigned long card_ptr)
 746 {
 747         struct net_device *net_dev;
 748         struct qeth_card *card;
 749         struct qeth_qdio_buffer *buffer;
 750         int index;
 751         int i;
 752
 753         card = (struct qeth_card *) card_ptr;
 754         net_dev = card->dev;
 755         if (card->options.performance_stats) {
 756                 card->perf_stats.inbound_cnt++;
 757                 card->perf_stats.inbound_start_time = qeth_get_micros();
 758         }
 759         if (qdio_err & QDIO_ERROR_ACTIVATE_CHECK_CONDITION) {
 760                 QETH_DBF_TEXT(TRACE, 1, "qdinchk");
 761                 QETH_DBF_TEXT_(TRACE, 1, "%s", CARD_BUS_ID(card));
 762                 QETH_DBF_TEXT_(TRACE, 1, "%04X%04X", first_element,
 763                                 count);
 764                 QETH_DBF_TEXT_(TRACE, 1, "%04X", queue);
 765                 qeth_schedule_recovery(card);
 766                 return;
 767         }
 768         for (i = first_element; i < (first_element + count); ++i) {
 769                 index = i % QDIO_MAX_BUFFERS_PER_Q;
 770                 buffer = &card->qdio.in_q->bufs[index];
 771                 if (!(qdio_err &&
 772                       qeth_check_qdio_errors(card, buffer->buffer, qdio_err,
 773                                              "qinerr")))
 774                         qeth_l2_process_inbound_buffer(card, buffer, index);
 775                 /* clear buffer and give back to hardware */
 776                 qeth_put_buffer_pool_entry(card, buffer->pool_entry);
 777                 qeth_queue_input_buffer(card, index);
 778         }
 779         if (card->options.performance_stats)
 780                 card->perf_stats.inbound_time += qeth_get_micros() -
 781                         card->perf_stats.inbound_start_time;
 782 }
 783
 784 static int qeth_l2_open(struct net_device *dev)
 785 {
 786         struct qeth_card *card = dev->ml_priv;
 787
 788         QETH_DBF_TEXT(TRACE, 4, "qethopen");
 789         if (card->state != CARD_STATE_SOFTSETUP)
 790                 return -ENODEV;
 791
 792         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
 793              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
 794                 QETH_DBF_TEXT(TRACE, 4, "nomacadr");
 795                 return -EPERM;
 796         }
 797         card->data.state = CH_STATE_UP;
 798         card->state = CARD_STATE_UP;
 799         netif_start_queue(dev);
 800
 801         if (!card->lan_online && netif_carrier_ok(dev))
 802                 netif_carrier_off(dev);
 803         return 0;
 804 }
 805
 806
 807 static int qeth_l2_stop(struct net_device *dev)
 808 {
 809         struct qeth_card *card = dev->ml_priv;
 810
 811         QETH_DBF_TEXT(TRACE, 4, "qethstop");
 812         netif_tx_disable(dev);
 813         if (card->state == CARD_STATE_UP)
 814                 card->state = CARD_STATE_SOFTSETUP;
 815         return 0;
 816 }
 817
 818 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 819 {
 820         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 821
 822         INIT_LIST_HEAD(&card->vid_list);
 823         INIT_LIST_HEAD(&card->mc_list);
 824         card->options.layer2 = 1;
 825         card->discipline.input_handler = (qdio_handler_t *)
 826                 qeth_l2_qdio_input_handler;
 827         card->discipline.output_handler = (qdio_handler_t *)
 828                 qeth_qdio_output_handler;
 829         card->discipline.recover = qeth_l2_recover;
 830         return 0;
 831 }
 832
 833 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
 834 {
 835         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
 836
 837         qeth_set_allowed_threads(card, 0, 1);
 838         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 839
 840         if (cgdev->state == CCWGROUP_ONLINE) {
 841                 card->use_hard_stop = 1;
 842                 qeth_l2_set_offline(cgdev);
 843         }
 844
 845         if (card->dev) {
 846                 unregister_netdev(card->dev);
 847                 card->dev = NULL;
 848         }
 849
 850         qeth_l2_del_all_mc(card);
 851         return;
 852 }
 853
 854 static const struct ethtool_ops qeth_l2_ethtool_ops = {
 855         .get_link = ethtool_op_get_link,
 856         .get_strings = qeth_core_get_strings,
 857         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 858         .get_sset_count = qeth_core_get_sset_count,
 859         .get_drvinfo = qeth_core_get_drvinfo,
 860         .get_settings = qeth_core_ethtool_get_settings,
 861 };
 862
 863 static const struct ethtool_ops qeth_l2_osn_ops = {
 864         .get_strings = qeth_core_get_strings,
 865         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 866         .get_sset_count = qeth_core_get_sset_count,
 867         .get_drvinfo = qeth_core_get_drvinfo,
 868 };
 869
 870 static const struct net_device_ops qeth_l2_netdev_ops = {
 871         .ndo_open               = qeth_l2_open,
 872         .ndo_stop               = qeth_l2_stop,
 873         .ndo_get_stats          = qeth_get_stats,
 874         .ndo_start_xmit         = qeth_l2_hard_start_xmit,
 875         .ndo_validate_addr      = eth_validate_addr,
 876         .ndo_set_multicast_list = qeth_l2_set_multicast_list,
 877         .ndo_do_ioctl           = qeth_l2_do_ioctl,
 878         .ndo_set_mac_address    = qeth_l2_set_mac_address,
 879         .ndo_change_mtu         = qeth_change_mtu,
 880         .ndo_vlan_rx_add_vid    = qeth_l2_vlan_rx_add_vid,
 881         .ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,
 882         .ndo_tx_timeout         = qeth_tx_timeout,
 883 };
 884
 885 static int qeth_l2_setup_netdev(struct qeth_card *card)
 886 {
 887         switch (card->info.type) {
 888         case QETH_CARD_TYPE_OSAE:
 889                 card->dev = alloc_etherdev(0);
 890                 break;
 891         case QETH_CARD_TYPE_IQD:
 892                 card->dev = alloc_netdev(0, "hsi%d", ether_setup);
 893                 break;
 894         case QETH_CARD_TYPE_OSN:
 895                 card->dev = alloc_netdev(0, "osn%d", ether_setup);
 896                 card->dev->flags |= IFF_NOARP;
 897                 break;
 898         default:
 899                 card->dev = alloc_etherdev(0);
 900         }
 901
 902         if (!card->dev)
 903                 return -ENODEV;
 904
 905         card->dev->ml_priv = card;
 906         card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
 907         card->dev->mtu = card->info.initial_mtu;
 908         card->dev->netdev_ops = &qeth_l2_netdev_ops;
 909         if (card->info.type != QETH_CARD_TYPE_OSN)
 910                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops);
 911         else
 912                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops);
 913         card->dev->features |= NETIF_F_HW_VLAN_FILTER;
 914         card->info.broadcast_capable = 1;
 915         qeth_l2_request_initial_mac(card);
 916         SET_NETDEV_DEV(card->dev, &card->gdev->dev);
 917         return register_netdev(card->dev);
 918 }
 919
 920 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 921 {
 922         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 923         int rc = 0;
 924         enum qeth_card_states recover_flag;
 925
 926         BUG_ON(!card);
 927         QETH_DBF_TEXT(SETUP, 2, "setonlin");
 928         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 929
 930         recover_flag = card->state;
 931         rc = qeth_core_hardsetup_card(card);
 932         if (rc) {
 933                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
 934                 rc = -ENODEV;
 935                 goto out_remove;
 936         }
 937
 938         if (!card->dev && qeth_l2_setup_netdev(card)) {
 939                 rc = -ENODEV;
 940                 goto out_remove;
 941         }
 942
 943         if (card->info.type != QETH_CARD_TYPE_OSN)
 944                 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
 945
 946         card->state = CARD_STATE_HARDSETUP;
 947         qeth_print_status_message(card);
 948
 949         /* softsetup */
 950         QETH_DBF_TEXT(SETUP, 2, "softsetp");
 951
 952         rc = qeth_send_startlan(card);
 953         if (rc) {
 954                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 955                 if (rc == 0xe080) {
 956                         dev_warn(&card->gdev->dev,
 957                                 "The LAN is offline\n");
 958                         card->lan_online = 0;
 959                         return 0;
 960                 }
 961                 rc = -ENODEV;
 962                 goto out_remove;
 963         } else
 964                 card->lan_online = 1;
 965
 966         if (card->info.type != QETH_CARD_TYPE_OSN) {
 967                 /* configure isolation level */
 968                 qeth_set_access_ctrl_online(card);
 969                 qeth_l2_process_vlans(card, 0);
 970         }
 971
 972         netif_tx_disable(card->dev);
 973
 974         rc = qeth_init_qdio_queues(card);
 975         if (rc) {
 976                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
 977                 rc = -ENODEV;
 978                 goto out_remove;
 979         }
 980         card->state = CARD_STATE_SOFTSETUP;
 981         netif_carrier_on(card->dev);
 982
 983         qeth_set_allowed_threads(card, 0xffffffff, 0);
 984         if (recover_flag == CARD_STATE_RECOVER) {
 985                 if (recovery_mode &&
 986                     card->info.type != QETH_CARD_TYPE_OSN) {
 987                         qeth_l2_open(card->dev);
 988                 } else {
 989                         rtnl_lock();
 990                         dev_open(card->dev);
 991                         rtnl_unlock();
 992                 }
 993                 /* this also sets saved unicast addresses */
 994                 qeth_l2_set_multicast_list(card->dev);
 995         }
 996         /* let user_space know that device is online */
 997         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
 998         return 0;
 999
1000 out_remove:
1001         card->use_hard_stop = 1;
1002         qeth_l2_stop_card(card, 0);
1003         ccw_device_set_offline(CARD_DDEV(card));
1004         ccw_device_set_offline(CARD_WDEV(card));
1005         ccw_device_set_offline(CARD_RDEV(card));
1006         if (recover_flag == CARD_STATE_RECOVER)
1007                 card->state = CARD_STATE_RECOVER;
1008         else
1009                 card->state = CARD_STATE_DOWN;
1010         return rc;
1011 }
1012
1013 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1014 {
1015         return __qeth_l2_set_online(gdev, 0);
1016 }
1017
1018 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1019                                         int recovery_mode)
1020 {
1021         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1022         int rc = 0, rc2 = 0, rc3 = 0;
1023         enum qeth_card_states recover_flag;
1024
1025         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1026         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1027
1028         if (card->dev && netif_carrier_ok(card->dev))
1029                 netif_carrier_off(card->dev);
1030         recover_flag = card->state;
1031         qeth_l2_stop_card(card, recovery_mode);
1032         rc  = ccw_device_set_offline(CARD_DDEV(card));
1033         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1034         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1035         if (!rc)
1036                 rc = (rc2) ? rc2 : rc3;
1037         if (rc)
1038                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1039         if (recover_flag == CARD_STATE_UP)
1040                 card->state = CARD_STATE_RECOVER;
1041         /* let user_space know that device is offline */
1042         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1043         return 0;
1044 }
1045
1046 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1047 {
1048         return __qeth_l2_set_offline(cgdev, 0);
1049 }
1050
1051 static int qeth_l2_recover(void *ptr)
1052 {
1053         struct qeth_card *card;
1054         int rc = 0;
1055
1056         card = (struct qeth_card *) ptr;
1057         QETH_DBF_TEXT(TRACE, 2, "recover1");
1058         QETH_DBF_HEX(TRACE, 2, &card, sizeof(void *));
1059         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1060                 return 0;
1061         QETH_DBF_TEXT(TRACE, 2, "recover2");
1062         dev_warn(&card->gdev->dev,
1063                 "A recovery process has been started for the device\n");
1064         card->use_hard_stop = 1;
1065         __qeth_l2_set_offline(card->gdev, 1);
1066         rc = __qeth_l2_set_online(card->gdev, 1);
1067         /* don't run another scheduled recovery */
1068         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1069         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1070         if (!rc)
1071                 dev_info(&card->gdev->dev,
1072                         "Device successfully recovered!\n");
1073         else {
1074                 if (card->dev) {
1075                         rtnl_lock();
1076                         dev_close(card->dev);
1077                         rtnl_unlock();
1078                 }
1079                 dev_warn(&card->gdev->dev, "The qeth device driver "
1080                         "failed to recover an error on the device\n");
1081         }
1082         return 0;
1083 }
1084
1085 static int __init qeth_l2_init(void)
1086 {
1087         pr_info("register layer 2 discipline\n");
1088         return 0;
1089 }
1090
1091 static void __exit qeth_l2_exit(void)
1092 {
1093         pr_info("unregister layer 2 discipline\n");
1094 }
1095
1096 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1097 {
1098         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1099         qeth_qdio_clear_card(card, 0);
1100         qeth_clear_qdio_buffers(card);
1101 }
1102
1103 static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev)
1104 {
1105         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1106
1107         if (card->dev)
1108                 netif_device_detach(card->dev);
1109         qeth_set_allowed_threads(card, 0, 1);
1110         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1111         if (gdev->state == CCWGROUP_OFFLINE)
1112                 return 0;
1113         if (card->state == CARD_STATE_UP) {
1114                 card->use_hard_stop = 1;
1115                 __qeth_l2_set_offline(card->gdev, 1);
1116         } else
1117                 __qeth_l2_set_offline(card->gdev, 0);
1118         return 0;
1119 }
1120
1121 static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
1122 {
1123         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1124         int rc = 0;
1125
1126         if (gdev->state == CCWGROUP_OFFLINE)
1127                 goto out;
1128
1129         if (card->state == CARD_STATE_RECOVER) {
1130                 rc = __qeth_l2_set_online(card->gdev, 1);
1131                 if (rc) {
1132                         if (card->dev) {
1133                                 rtnl_lock();
1134                                 dev_close(card->dev);
1135                                 rtnl_unlock();
1136                         }
1137                 }
1138         } else
1139                 rc = __qeth_l2_set_online(card->gdev, 0);
1140 out:
1141         qeth_set_allowed_threads(card, 0xffffffff, 0);
1142         if (card->dev)
1143                 netif_device_attach(card->dev);
1144         if (rc)
1145                 dev_warn(&card->gdev->dev, "The qeth device driver "
1146                         "failed to recover an error on the device\n");
1147         return rc;
1148 }
1149
1150 struct ccwgroup_driver qeth_l2_ccwgroup_driver = {
1151         .probe = qeth_l2_probe_device,
1152         .remove = qeth_l2_remove_device,
1153         .set_online = qeth_l2_set_online,
1154         .set_offline = qeth_l2_set_offline,
1155         .shutdown = qeth_l2_shutdown,
1156         .freeze = qeth_l2_pm_suspend,
1157         .thaw = qeth_l2_pm_resume,
1158         .restore = qeth_l2_pm_resume,
1159 };
1160 EXPORT_SYMBOL_GPL(qeth_l2_ccwgroup_driver);
1161
1162 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1163                            struct qeth_cmd_buffer *iob)
1164 {
1165         unsigned long flags;
1166         int rc = 0;
1167
1168         QETH_DBF_TEXT(TRACE, 5, "osndctrd");
1169
1170         wait_event(card->wait_q,
1171                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1172         qeth_prepare_control_data(card, len, iob);
1173         QETH_DBF_TEXT(TRACE, 6, "osnoirqp");
1174         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1175         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1176                               (addr_t) iob, 0, 0);
1177         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1178         if (rc) {
1179                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1180                            "ccw_device_start rc = %i\n", rc);
1181                 QETH_DBF_TEXT_(TRACE, 2, " err%d", rc);
1182                 qeth_release_buffer(iob->channel, iob);
1183                 atomic_set(&card->write.irq_pending, 0);
1184                 wake_up(&card->wait_q);
1185         }
1186         return rc;
1187 }
1188
1189 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1190                         struct qeth_cmd_buffer *iob, int data_len)
1191 {
1192         u16 s1, s2;
1193
1194         QETH_DBF_TEXT(TRACE, 4, "osndipa");
1195
1196         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1197         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1198         s2 = (u16)data_len;
1199         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1200         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1201         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1202         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1203         return qeth_osn_send_control_data(card, s1, iob);
1204 }
1205
1206 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1207 {
1208         struct qeth_cmd_buffer *iob;
1209         struct qeth_card *card;
1210         int rc;
1211
1212         QETH_DBF_TEXT(TRACE, 2, "osnsdmc");
1213         if (!dev)
1214                 return -ENODEV;
1215         card = dev->ml_priv;
1216         if (!card)
1217                 return -ENODEV;
1218         if ((card->state != CARD_STATE_UP) &&
1219             (card->state != CARD_STATE_SOFTSETUP))
1220                 return -ENODEV;
1221         iob = qeth_wait_for_buffer(&card->write);
1222         memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1223         rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1224         return rc;
1225 }
1226 EXPORT_SYMBOL(qeth_osn_assist);
1227
1228 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1229                   int (*assist_cb)(struct net_device *, void *),
1230                   int (*data_cb)(struct sk_buff *))
1231 {
1232         struct qeth_card *card;
1233
1234         QETH_DBF_TEXT(TRACE, 2, "osnreg");
1235         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1236         if (*dev == NULL)
1237                 return -ENODEV;
1238         card = (*dev)->ml_priv;
1239         if (!card)
1240                 return -ENODEV;
1241         if ((assist_cb == NULL) || (data_cb == NULL))
1242                 return -EINVAL;
1243         card->osn_info.assist_cb = assist_cb;
1244         card->osn_info.data_cb = data_cb;
1245         return 0;
1246 }
1247 EXPORT_SYMBOL(qeth_osn_register);
1248
1249 void qeth_osn_deregister(struct net_device *dev)
1250 {
1251         struct qeth_card *card;
1252
1253         QETH_DBF_TEXT(TRACE, 2, "osndereg");
1254         if (!dev)
1255                 return;
1256         card = dev->ml_priv;
1257         if (!card)
1258                 return;
1259         card->osn_info.assist_cb = NULL;
1260         card->osn_info.data_cb = NULL;
1261         return;
1262 }
1263 EXPORT_SYMBOL(qeth_osn_deregister);
1264
1265 module_init(qeth_l2_init);
1266 module_exit(qeth_l2_exit);
1267 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1268 MODULE_DESCRIPTION("qeth layer 2 discipline");
1269 MODULE_LICENSE("GPL");