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   1 /*
   2  *  drivers/s390/net/qeth_l2_main.c
   3  *
   4  *    Copyright IBM Corp. 2007
   5  *    Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
   6  *               Frank Pavlic <fpavlic@de.ibm.com>,
   7  *               Thomas Spatzier <tspat@de.ibm.com>,
   8  *               Frank Blaschka <frank.blaschka@de.ibm.com>
   9  */
  10
  11 #define KMSG_COMPONENT "qeth"
  12 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  13
  14 #include <linux/module.h>
  15 #include <linux/moduleparam.h>
  16 #include <linux/string.h>
  17 #include <linux/errno.h>
  18 #include <linux/kernel.h>
  19 #include <linux/etherdevice.h>
  20 #include <linux/mii.h>
  21 #include <linux/ip.h>
  22
  23 #include "qeth_core.h"
  24 #include "qeth_core_offl.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 == 0x2005) {
 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 void qeth_l2_get_packet_type(struct qeth_card *card,
 220                         struct qeth_hdr *hdr, struct sk_buff *skb)
 221 {
 222         __u16 hdr_mac;
 223
 224         if (!memcmp(skb->data + QETH_HEADER_SIZE,
 225                     skb->dev->broadcast, 6)) {
 226                 /* broadcast? */
 227                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 228                 return;
 229         }
 230         hdr_mac = *((__u16 *)skb->data);
 231         /* tr multicast? */
 232         switch (card->info.link_type) {
 233         case QETH_LINK_TYPE_HSTR:
 234         case QETH_LINK_TYPE_LANE_TR:
 235                 if ((hdr_mac == QETH_TR_MAC_NC) ||
 236                     (hdr_mac == QETH_TR_MAC_C))
 237                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 238                 else
 239                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 240                 break;
 241                 /* eth or so multicast? */
 242         default:
 243                 if ((hdr_mac == QETH_ETH_MAC_V4) ||
 244                      (hdr_mac == QETH_ETH_MAC_V6))
 245                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 246                 else
 247                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 248         }
 249 }
 250
 251 static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
 252                         struct sk_buff *skb, int ipv, int cast_type)
 253 {
 254         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
 255
 256         memset(hdr, 0, sizeof(struct qeth_hdr));
 257         hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
 258
 259         /* set byte byte 3 to casting flags */
 260         if (cast_type == RTN_MULTICAST)
 261                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 262         else if (cast_type == RTN_BROADCAST)
 263                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 264         else
 265                 qeth_l2_get_packet_type(card, hdr, skb);
 266
 267         hdr->hdr.l2.pkt_length = skb->len-QETH_HEADER_SIZE;
 268         /* VSWITCH relies on the VLAN
 269          * information to be present in
 270          * the QDIO header */
 271         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
 272                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
 273                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
 274         }
 275 }
 276
 277 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
 278                         struct qeth_reply *reply, unsigned long data)
 279 {
 280         struct qeth_ipa_cmd *cmd;
 281
 282         QETH_DBF_TEXT(TRACE, 2, "L2sdvcb");
 283         cmd = (struct qeth_ipa_cmd *) data;
 284         if (cmd->hdr.return_code) {
 285                 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x. "
 286                           "Continuing\n", cmd->data.setdelvlan.vlan_id,
 287                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 288                 QETH_DBF_TEXT_(TRACE, 2, "L2VL%4x", cmd->hdr.command);
 289                 QETH_DBF_TEXT_(TRACE, 2, "L2%s", CARD_BUS_ID(card));
 290                 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
 291         }
 292         return 0;
 293 }
 294
 295 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
 296                                 enum qeth_ipa_cmds ipacmd)
 297 {
 298         struct qeth_ipa_cmd *cmd;
 299         struct qeth_cmd_buffer *iob;
 300
 301         QETH_DBF_TEXT_(TRACE, 4, "L2sdv%x", ipacmd);
 302         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 303         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 304         cmd->data.setdelvlan.vlan_id = i;
 305         return qeth_send_ipa_cmd(card, iob,
 306                                  qeth_l2_send_setdelvlan_cb, NULL);
 307 }
 308
 309 static void qeth_l2_process_vlans(struct qeth_card *card, int clear)
 310 {
 311         struct qeth_vlan_vid *id;
 312         QETH_DBF_TEXT(TRACE, 3, "L2prcvln");
 313         spin_lock_bh(&card->vlanlock);
 314         list_for_each_entry(id, &card->vid_list, list) {
 315                 if (clear)
 316                         qeth_l2_send_setdelvlan(card, id->vid,
 317                                 IPA_CMD_DELVLAN);
 318                 else
 319                         qeth_l2_send_setdelvlan(card, id->vid,
 320                                 IPA_CMD_SETVLAN);
 321         }
 322         spin_unlock_bh(&card->vlanlock);
 323 }
 324
 325 static void qeth_l2_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
 326 {
 327         struct qeth_card *card = dev->ml_priv;
 328         struct qeth_vlan_vid *id;
 329
 330         QETH_DBF_TEXT_(TRACE, 4, "aid:%d", vid);
 331         id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
 332         if (id) {
 333                 id->vid = vid;
 334                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
 335                 spin_lock_bh(&card->vlanlock);
 336                 list_add_tail(&id->list, &card->vid_list);
 337                 spin_unlock_bh(&card->vlanlock);
 338         }
 339 }
 340
 341 static void qeth_l2_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
 342 {
 343         struct qeth_vlan_vid *id, *tmpid = NULL;
 344         struct qeth_card *card = dev->ml_priv;
 345
 346         QETH_DBF_TEXT_(TRACE, 4, "kid:%d", vid);
 347         spin_lock_bh(&card->vlanlock);
 348         list_for_each_entry(id, &card->vid_list, list) {
 349                 if (id->vid == vid) {
 350                         list_del(&id->list);
 351                         tmpid = id;
 352                         break;
 353                 }
 354         }
 355         spin_unlock_bh(&card->vlanlock);
 356         if (tmpid) {
 357                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 358                 kfree(tmpid);
 359         }
 360         qeth_l2_set_multicast_list(card->dev);
 361 }
 362
 363 static int qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
 364 {
 365         int rc = 0;
 366
 367         QETH_DBF_TEXT(SETUP , 2, "stopcard");
 368         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 369
 370         qeth_set_allowed_threads(card, 0, 1);
 371         if (card->read.state == CH_STATE_UP &&
 372             card->write.state == CH_STATE_UP &&
 373             (card->state == CARD_STATE_UP)) {
 374                 if (recovery_mode &&
 375                     card->info.type != QETH_CARD_TYPE_OSN) {
 376                         qeth_l2_stop(card->dev);
 377                 } else {
 378                         rtnl_lock();
 379                         dev_close(card->dev);
 380                         rtnl_unlock();
 381                 }
 382                 if (!card->use_hard_stop) {
 383                         __u8 *mac = &card->dev->dev_addr[0];
 384                         rc = qeth_l2_send_delmac(card, mac);
 385                         QETH_DBF_TEXT_(SETUP, 2, "Lerr%d", rc);
 386                 }
 387                 card->state = CARD_STATE_SOFTSETUP;
 388         }
 389         if (card->state == CARD_STATE_SOFTSETUP) {
 390                 qeth_l2_process_vlans(card, 1);
 391                 if (!card->use_hard_stop)
 392                         qeth_l2_del_all_mc(card);
 393                 qeth_clear_ipacmd_list(card);
 394                 card->state = CARD_STATE_HARDSETUP;
 395         }
 396         if (card->state == CARD_STATE_HARDSETUP) {
 397                 qeth_qdio_clear_card(card, 0);
 398                 qeth_clear_qdio_buffers(card);
 399                 qeth_clear_working_pool_list(card);
 400                 card->state = CARD_STATE_DOWN;
 401         }
 402         if (card->state == CARD_STATE_DOWN) {
 403                 qeth_clear_cmd_buffers(&card->read);
 404                 qeth_clear_cmd_buffers(&card->write);
 405         }
 406         card->use_hard_stop = 0;
 407         return rc;
 408 }
 409
 410 static void qeth_l2_process_inbound_buffer(struct qeth_card *card,
 411                             struct qeth_qdio_buffer *buf, int index)
 412 {
 413         struct qdio_buffer_element *element;
 414         struct sk_buff *skb;
 415         struct qeth_hdr *hdr;
 416         int offset;
 417         unsigned int len;
 418
 419         /* get first element of current buffer */
 420         element = (struct qdio_buffer_element *)&buf->buffer->element[0];
 421         offset = 0;
 422         if (card->options.performance_stats)
 423                 card->perf_stats.bufs_rec++;
 424         while ((skb = qeth_core_get_next_skb(card, buf->buffer, &element,
 425                                        &offset, &hdr))) {
 426                 skb->dev = card->dev;
 427                 /* is device UP ? */
 428                 if (!(card->dev->flags & IFF_UP)) {
 429                         dev_kfree_skb_any(skb);
 430                         continue;
 431                 }
 432
 433                 switch (hdr->hdr.l2.id) {
 434                 case QETH_HEADER_TYPE_LAYER2:
 435                         skb->pkt_type = PACKET_HOST;
 436                         skb->protocol = eth_type_trans(skb, skb->dev);
 437                         if (card->options.checksum_type == NO_CHECKSUMMING)
 438                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 439                         else
 440                                 skb->ip_summed = CHECKSUM_NONE;
 441                         if (skb->protocol == htons(ETH_P_802_2))
 442                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
 443                         len = skb->len;
 444                         netif_rx(skb);
 445                         break;
 446                 case QETH_HEADER_TYPE_OSN:
 447                         if (card->info.type == QETH_CARD_TYPE_OSN) {
 448                                 skb_push(skb, sizeof(struct qeth_hdr));
 449                                 skb_copy_to_linear_data(skb, hdr,
 450                                                 sizeof(struct qeth_hdr));
 451                                 len = skb->len;
 452                                 card->osn_info.data_cb(skb);
 453                                 break;
 454                         }
 455                         /* else unknown */
 456                 default:
 457                         dev_kfree_skb_any(skb);
 458                         QETH_DBF_TEXT(TRACE, 3, "inbunkno");
 459                         QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
 460                         continue;
 461                 }
 462                 card->dev->last_rx = jiffies;
 463                 card->stats.rx_packets++;
 464                 card->stats.rx_bytes += len;
 465         }
 466 }
 467
 468 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
 469                            enum qeth_ipa_cmds ipacmd,
 470                            int (*reply_cb) (struct qeth_card *,
 471                                             struct qeth_reply*,
 472                                             unsigned long))
 473 {
 474         struct qeth_ipa_cmd *cmd;
 475         struct qeth_cmd_buffer *iob;
 476
 477         QETH_DBF_TEXT(TRACE, 2, "L2sdmac");
 478         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 479         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 480         cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
 481         memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
 482         return qeth_send_ipa_cmd(card, iob, reply_cb, NULL);
 483 }
 484
 485 static int qeth_l2_send_setmac_cb(struct qeth_card *card,
 486                            struct qeth_reply *reply,
 487                            unsigned long data)
 488 {
 489         struct qeth_ipa_cmd *cmd;
 490
 491         QETH_DBF_TEXT(TRACE, 2, "L2Smaccb");
 492         cmd = (struct qeth_ipa_cmd *) data;
 493         if (cmd->hdr.return_code) {
 494                 QETH_DBF_TEXT_(TRACE, 2, "L2er%x", cmd->hdr.return_code);
 495                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 496                 cmd->hdr.return_code = -EIO;
 497         } else {
 498                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 499                 memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
 500                        OSA_ADDR_LEN);
 501                 dev_info(&card->gdev->dev,
 502                         "MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x "
 503                         "successfully registered on device %s\n",
 504                         card->dev->dev_addr[0], card->dev->dev_addr[1],
 505                         card->dev->dev_addr[2], card->dev->dev_addr[3],
 506                         card->dev->dev_addr[4], card->dev->dev_addr[5],
 507                         card->dev->name);
 508         }
 509         return 0;
 510 }
 511
 512 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
 513 {
 514         QETH_DBF_TEXT(TRACE, 2, "L2Setmac");
 515         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
 516                                           qeth_l2_send_setmac_cb);
 517 }
 518
 519 static int qeth_l2_send_delmac_cb(struct qeth_card *card,
 520                            struct qeth_reply *reply,
 521                            unsigned long data)
 522 {
 523         struct qeth_ipa_cmd *cmd;
 524
 525         QETH_DBF_TEXT(TRACE, 2, "L2Dmaccb");
 526         cmd = (struct qeth_ipa_cmd *) data;
 527         if (cmd->hdr.return_code) {
 528                 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
 529                 cmd->hdr.return_code = -EIO;
 530                 return 0;
 531         }
 532         card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 533
 534         return 0;
 535 }
 536
 537 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
 538 {
 539         QETH_DBF_TEXT(TRACE, 2, "L2Delmac");
 540         if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
 541                 return 0;
 542         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
 543                                           qeth_l2_send_delmac_cb);
 544 }
 545
 546 static int qeth_l2_request_initial_mac(struct qeth_card *card)
 547 {
 548         int rc = 0;
 549         char vendor_pre[] = {0x02, 0x00, 0x00};
 550
 551         QETH_DBF_TEXT(SETUP, 2, "doL2init");
 552         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
 553
 554         rc = qeth_query_setadapterparms(card);
 555         if (rc) {
 556                 QETH_DBF_MESSAGE(2, "could not query adapter parameters on "
 557                         "device %s: x%x\n", CARD_BUS_ID(card), rc);
 558         }
 559
 560         if ((card->info.type == QETH_CARD_TYPE_IQD) ||
 561             (card->info.guestlan)) {
 562                 rc = qeth_setadpparms_change_macaddr(card);
 563                 if (rc) {
 564                         QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
 565                                 "device %s: x%x\n", CARD_BUS_ID(card), rc);
 566                         QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 567                         return rc;
 568                 }
 569                 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN);
 570         } else {
 571                 random_ether_addr(card->dev->dev_addr);
 572                 memcpy(card->dev->dev_addr, vendor_pre, 3);
 573         }
 574         return 0;
 575 }
 576
 577 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 578 {
 579         struct sockaddr *addr = p;
 580         struct qeth_card *card = dev->ml_priv;
 581         int rc = 0;
 582
 583         QETH_DBF_TEXT(TRACE, 3, "setmac");
 584
 585         if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
 586                 QETH_DBF_TEXT(TRACE, 3, "setmcINV");
 587                 return -EOPNOTSUPP;
 588         }
 589
 590         if (card->info.type == QETH_CARD_TYPE_OSN) {
 591                 QETH_DBF_TEXT(TRACE, 3, "setmcOSN");
 592                 return -EOPNOTSUPP;
 593         }
 594         QETH_DBF_TEXT_(TRACE, 3, "%s", CARD_BUS_ID(card));
 595         QETH_DBF_HEX(TRACE, 3, addr->sa_data, OSA_ADDR_LEN);
 596         rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
 597         if (!rc)
 598                 rc = qeth_l2_send_setmac(card, addr->sa_data);
 599         return rc;
 600 }
 601
 602 static void qeth_l2_set_multicast_list(struct net_device *dev)
 603 {
 604         struct qeth_card *card = dev->ml_priv;
 605         struct dev_addr_list *dm;
 606
 607         if (card->info.type == QETH_CARD_TYPE_OSN)
 608                 return ;
 609
 610         QETH_DBF_TEXT(TRACE, 3, "setmulti");
 611         qeth_l2_del_all_mc(card);
 612         spin_lock_bh(&card->mclock);
 613         for (dm = dev->mc_list; dm; dm = dm->next)
 614                 qeth_l2_add_mc(card, dm->da_addr, 0);
 615
 616         for (dm = dev->uc_list; dm; dm = dm->next)
 617                 qeth_l2_add_mc(card, dm->da_addr, 1);
 618
 619         spin_unlock_bh(&card->mclock);
 620         if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
 621                 return;
 622         qeth_setadp_promisc_mode(card);
 623 }
 624
 625 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 626 {
 627         int rc;
 628         struct qeth_hdr *hdr = NULL;
 629         int elements = 0;
 630         struct qeth_card *card = dev->ml_priv;
 631         struct sk_buff *new_skb = skb;
 632         int ipv = qeth_get_ip_version(skb);
 633         int cast_type = qeth_get_cast_type(card, skb);
 634         struct qeth_qdio_out_q *queue = card->qdio.out_qs
 635                 [qeth_get_priority_queue(card, skb, ipv, cast_type)];
 636         int tx_bytes = skb->len;
 637         enum qeth_large_send_types large_send = QETH_LARGE_SEND_NO;
 638         struct qeth_eddp_context *ctx = NULL;
 639         int data_offset = -1;
 640         int elements_needed = 0;
 641         int hd_len = 0;
 642
 643         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
 644                 card->stats.tx_carrier_errors++;
 645                 goto tx_drop;
 646         }
 647
 648         if ((card->info.type == QETH_CARD_TYPE_OSN) &&
 649             (skb->protocol == htons(ETH_P_IPV6)))
 650                 goto tx_drop;
 651
 652         if (card->options.performance_stats) {
 653                 card->perf_stats.outbound_cnt++;
 654                 card->perf_stats.outbound_start_time = qeth_get_micros();
 655         }
 656         netif_stop_queue(dev);
 657
 658         if (skb_is_gso(skb))
 659                 large_send = QETH_LARGE_SEND_EDDP;
 660
 661         if (card->info.type == QETH_CARD_TYPE_OSN)
 662                 hdr = (struct qeth_hdr *)skb->data;
 663         else {
 664                 if ((card->info.type == QETH_CARD_TYPE_IQD) && (!large_send) &&
 665                     (skb_shinfo(skb)->nr_frags == 0)) {
 666                         new_skb = skb;
 667                         data_offset = ETH_HLEN;
 668                         hd_len = ETH_HLEN;
 669                         hdr = kmem_cache_alloc(qeth_core_header_cache,
 670                                                 GFP_ATOMIC);
 671                         if (!hdr)
 672                                 goto tx_drop;
 673                         elements_needed++;
 674                         skb_reset_mac_header(new_skb);
 675                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 676                         hdr->hdr.l2.pkt_length = new_skb->len;
 677                         memcpy(((char *)hdr) + sizeof(struct qeth_hdr),
 678                                 skb_mac_header(new_skb), ETH_HLEN);
 679                 } else {
 680                         /* create a clone with writeable headroom */
 681                         new_skb = skb_realloc_headroom(skb,
 682                                                 sizeof(struct qeth_hdr));
 683                         if (!new_skb)
 684                                 goto tx_drop;
 685                         hdr = (struct qeth_hdr *)skb_push(new_skb,
 686                                                 sizeof(struct qeth_hdr));
 687                         skb_set_mac_header(new_skb, sizeof(struct qeth_hdr));
 688                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 689                 }
 690         }
 691
 692         if (large_send == QETH_LARGE_SEND_EDDP) {
 693                 ctx = qeth_eddp_create_context(card, new_skb, hdr,
 694                                                 skb->sk->sk_protocol);
 695                 if (ctx == NULL) {
 696                         QETH_DBF_MESSAGE(2, "could not create eddp context\n");
 697                         goto tx_drop;
 698                 }
 699         } else {
 700                 elements = qeth_get_elements_no(card, (void *)hdr, new_skb,
 701                                                 elements_needed);
 702                 if (!elements) {
 703                         if (data_offset >= 0)
 704                                 kmem_cache_free(qeth_core_header_cache, hdr);
 705                         goto tx_drop;
 706                 }
 707         }
 708
 709         if ((large_send == QETH_LARGE_SEND_NO) &&
 710             (skb->ip_summed == CHECKSUM_PARTIAL))
 711                 qeth_tx_csum(new_skb);
 712
 713         if (card->info.type != QETH_CARD_TYPE_IQD)
 714                 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
 715                                          elements, ctx);
 716         else
 717                 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
 718                                         elements, ctx, data_offset, hd_len);
 719         if (!rc) {
 720                 card->stats.tx_packets++;
 721                 card->stats.tx_bytes += tx_bytes;
 722                 if (new_skb != skb)
 723                         dev_kfree_skb_any(skb);
 724                 if (card->options.performance_stats) {
 725                         if (large_send != QETH_LARGE_SEND_NO) {
 726                                 card->perf_stats.large_send_bytes += tx_bytes;
 727                                 card->perf_stats.large_send_cnt++;
 728                         }
 729                         if (skb_shinfo(new_skb)->nr_frags > 0) {
 730                                 card->perf_stats.sg_skbs_sent++;
 731                                 /* nr_frags + skb->data */
 732                                 card->perf_stats.sg_frags_sent +=
 733                                         skb_shinfo(new_skb)->nr_frags + 1;
 734                         }
 735                 }
 736
 737                 if (ctx != NULL) {
 738                         qeth_eddp_put_context(ctx);
 739                         dev_kfree_skb_any(new_skb);
 740                 }
 741         } else {
 742                 if (ctx != NULL)
 743                         qeth_eddp_put_context(ctx);
 744
 745                 if (data_offset >= 0)
 746                         kmem_cache_free(qeth_core_header_cache, hdr);
 747
 748                 if (rc == -EBUSY) {
 749                         if (new_skb != skb)
 750                                 dev_kfree_skb_any(new_skb);
 751                         return NETDEV_TX_BUSY;
 752                 } else
 753                         goto tx_drop;
 754         }
 755
 756         netif_wake_queue(dev);
 757         if (card->options.performance_stats)
 758                 card->perf_stats.outbound_time += qeth_get_micros() -
 759                         card->perf_stats.outbound_start_time;
 760         return rc;
 761
 762 tx_drop:
 763         card->stats.tx_dropped++;
 764         card->stats.tx_errors++;
 765         if ((new_skb != skb) && new_skb)
 766                 dev_kfree_skb_any(new_skb);
 767         dev_kfree_skb_any(skb);
 768         netif_wake_queue(dev);
 769         return NETDEV_TX_OK;
 770 }
 771
 772 static void qeth_l2_qdio_input_handler(struct ccw_device *ccwdev,
 773                         unsigned int qdio_err, unsigned int queue,
 774                         int first_element, int count, unsigned long card_ptr)
 775 {
 776         struct net_device *net_dev;
 777         struct qeth_card *card;
 778         struct qeth_qdio_buffer *buffer;
 779         int index;
 780         int i;
 781
 782         card = (struct qeth_card *) card_ptr;
 783         net_dev = card->dev;
 784         if (card->options.performance_stats) {
 785                 card->perf_stats.inbound_cnt++;
 786                 card->perf_stats.inbound_start_time = qeth_get_micros();
 787         }
 788         if (qdio_err & QDIO_ERROR_ACTIVATE_CHECK_CONDITION) {
 789                 QETH_DBF_TEXT(TRACE, 1, "qdinchk");
 790                 QETH_DBF_TEXT_(TRACE, 1, "%s", CARD_BUS_ID(card));
 791                 QETH_DBF_TEXT_(TRACE, 1, "%04X%04X", first_element,
 792                                 count);
 793                 QETH_DBF_TEXT_(TRACE, 1, "%04X", queue);
 794                 qeth_schedule_recovery(card);
 795                 return;
 796         }
 797         for (i = first_element; i < (first_element + count); ++i) {
 798                 index = i % QDIO_MAX_BUFFERS_PER_Q;
 799                 buffer = &card->qdio.in_q->bufs[index];
 800                 if (!(qdio_err &&
 801                       qeth_check_qdio_errors(buffer->buffer, qdio_err, "qinerr")))
 802                         qeth_l2_process_inbound_buffer(card, buffer, index);
 803                 /* clear buffer and give back to hardware */
 804                 qeth_put_buffer_pool_entry(card, buffer->pool_entry);
 805                 qeth_queue_input_buffer(card, index);
 806         }
 807         if (card->options.performance_stats)
 808                 card->perf_stats.inbound_time += qeth_get_micros() -
 809                         card->perf_stats.inbound_start_time;
 810 }
 811
 812 static int qeth_l2_open(struct net_device *dev)
 813 {
 814         struct qeth_card *card = dev->ml_priv;
 815
 816         QETH_DBF_TEXT(TRACE, 4, "qethopen");
 817         if (card->state != CARD_STATE_SOFTSETUP)
 818                 return -ENODEV;
 819
 820         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
 821              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
 822                 QETH_DBF_TEXT(TRACE, 4, "nomacadr");
 823                 return -EPERM;
 824         }
 825         card->data.state = CH_STATE_UP;
 826         card->state = CARD_STATE_UP;
 827         netif_start_queue(dev);
 828
 829         if (!card->lan_online && netif_carrier_ok(dev))
 830                 netif_carrier_off(dev);
 831         return 0;
 832 }
 833
 834
 835 static int qeth_l2_stop(struct net_device *dev)
 836 {
 837         struct qeth_card *card = dev->ml_priv;
 838
 839         QETH_DBF_TEXT(TRACE, 4, "qethstop");
 840         netif_tx_disable(dev);
 841         if (card->state == CARD_STATE_UP)
 842                 card->state = CARD_STATE_SOFTSETUP;
 843         return 0;
 844 }
 845
 846 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 847 {
 848         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 849
 850         INIT_LIST_HEAD(&card->vid_list);
 851         INIT_LIST_HEAD(&card->mc_list);
 852         card->options.layer2 = 1;
 853         card->discipline.input_handler = (qdio_handler_t *)
 854                 qeth_l2_qdio_input_handler;
 855         card->discipline.output_handler = (qdio_handler_t *)
 856                 qeth_qdio_output_handler;
 857         card->discipline.recover = qeth_l2_recover;
 858         return 0;
 859 }
 860
 861 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
 862 {
 863         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
 864
 865         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 866
 867         if (cgdev->state == CCWGROUP_ONLINE) {
 868                 card->use_hard_stop = 1;
 869                 qeth_l2_set_offline(cgdev);
 870         }
 871
 872         if (card->dev) {
 873                 unregister_netdev(card->dev);
 874                 card->dev = NULL;
 875         }
 876
 877         qeth_l2_del_all_mc(card);
 878         return;
 879 }
 880
 881 static int qeth_l2_ethtool_set_tso(struct net_device *dev, u32 data)
 882 {
 883         struct qeth_card *card = dev->ml_priv;
 884
 885         if (data) {
 886                 if (card->options.large_send == QETH_LARGE_SEND_NO) {
 887                         card->options.large_send = QETH_LARGE_SEND_EDDP;
 888                         dev->features |= NETIF_F_TSO;
 889                 }
 890         } else {
 891                 dev->features &= ~NETIF_F_TSO;
 892                 card->options.large_send = QETH_LARGE_SEND_NO;
 893         }
 894         return 0;
 895 }
 896
 897 static struct ethtool_ops qeth_l2_ethtool_ops = {
 898         .get_link = ethtool_op_get_link,
 899         .get_tx_csum = ethtool_op_get_tx_csum,
 900         .set_tx_csum = ethtool_op_set_tx_hw_csum,
 901         .get_sg = ethtool_op_get_sg,
 902         .set_sg = ethtool_op_set_sg,
 903         .get_tso = ethtool_op_get_tso,
 904         .set_tso = qeth_l2_ethtool_set_tso,
 905         .get_strings = qeth_core_get_strings,
 906         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 907         .get_stats_count = qeth_core_get_stats_count,
 908         .get_drvinfo = qeth_core_get_drvinfo,
 909         .get_settings = qeth_core_ethtool_get_settings,
 910 };
 911
 912 static struct ethtool_ops qeth_l2_osn_ops = {
 913         .get_strings = qeth_core_get_strings,
 914         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 915         .get_stats_count = qeth_core_get_stats_count,
 916         .get_drvinfo = qeth_core_get_drvinfo,
 917 };
 918
 919 static struct net_device_ops qeth_l2_netdev_ops = {
 920         .ndo_open               = qeth_l2_open,
 921         .ndo_stop               = qeth_l2_stop,
 922         .ndo_get_stats          = qeth_get_stats,
 923         .ndo_start_xmit         = qeth_l2_hard_start_xmit,
 924         .ndo_validate_addr      = eth_validate_addr,
 925         .ndo_set_multicast_list = qeth_l2_set_multicast_list,
 926         .ndo_do_ioctl           = qeth_l2_do_ioctl,
 927         .ndo_set_mac_address    = qeth_l2_set_mac_address,
 928         .ndo_change_mtu         = qeth_change_mtu,
 929         .ndo_vlan_rx_add_vid    = qeth_l2_vlan_rx_add_vid,
 930         .ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,
 931         .ndo_tx_timeout         = qeth_tx_timeout,
 932 };
 933
 934 static int qeth_l2_setup_netdev(struct qeth_card *card)
 935 {
 936         switch (card->info.type) {
 937         case QETH_CARD_TYPE_OSAE:
 938                 card->dev = alloc_etherdev(0);
 939                 break;
 940         case QETH_CARD_TYPE_IQD:
 941                 card->dev = alloc_netdev(0, "hsi%d", ether_setup);
 942                 break;
 943         case QETH_CARD_TYPE_OSN:
 944                 card->dev = alloc_netdev(0, "osn%d", ether_setup);
 945                 card->dev->flags |= IFF_NOARP;
 946                 break;
 947         default:
 948                 card->dev = alloc_etherdev(0);
 949         }
 950
 951         if (!card->dev)
 952                 return -ENODEV;
 953
 954         card->dev->ml_priv = card;
 955         card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
 956         card->dev->mtu = card->info.initial_mtu;
 957         card->dev->netdev_ops = &qeth_l2_netdev_ops;
 958         if (card->info.type != QETH_CARD_TYPE_OSN)
 959                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops);
 960         else
 961                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops);
 962         card->dev->features |= NETIF_F_HW_VLAN_FILTER;
 963         card->info.broadcast_capable = 1;
 964         qeth_l2_request_initial_mac(card);
 965         SET_NETDEV_DEV(card->dev, &card->gdev->dev);
 966         return register_netdev(card->dev);
 967 }
 968
 969 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 970 {
 971         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 972         int rc = 0;
 973         enum qeth_card_states recover_flag;
 974
 975         BUG_ON(!card);
 976         QETH_DBF_TEXT(SETUP, 2, "setonlin");
 977         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 978
 979         qeth_set_allowed_threads(card, QETH_RECOVER_THREAD, 1);
 980         recover_flag = card->state;
 981         rc = ccw_device_set_online(CARD_RDEV(card));
 982         if (rc) {
 983                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 984                 return -EIO;
 985         }
 986         rc = ccw_device_set_online(CARD_WDEV(card));
 987         if (rc) {
 988                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 989                 return -EIO;
 990         }
 991         rc = ccw_device_set_online(CARD_DDEV(card));
 992         if (rc) {
 993                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 994                 return -EIO;
 995         }
 996
 997         rc = qeth_core_hardsetup_card(card);
 998         if (rc) {
 999                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
1000                 goto out_remove;
1001         }
1002
1003         if (!card->dev && qeth_l2_setup_netdev(card))
1004                 goto out_remove;
1005
1006         if (card->info.type != QETH_CARD_TYPE_OSN)
1007                 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
1008
1009         card->state = CARD_STATE_HARDSETUP;
1010         qeth_print_status_message(card);
1011
1012         /* softsetup */
1013         QETH_DBF_TEXT(SETUP, 2, "softsetp");
1014
1015         rc = qeth_send_startlan(card);
1016         if (rc) {
1017                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1018                 if (rc == 0xe080) {
1019                         dev_warn(&card->gdev->dev,
1020                                 "The LAN is offline\n");
1021                         card->lan_online = 0;
1022                 }
1023                 return rc;
1024         } else
1025                 card->lan_online = 1;
1026
1027         if (card->info.type != QETH_CARD_TYPE_OSN) {
1028                 qeth_set_large_send(card, card->options.large_send);
1029                 qeth_l2_process_vlans(card, 0);
1030         }
1031
1032         netif_tx_disable(card->dev);
1033
1034         rc = qeth_init_qdio_queues(card);
1035         if (rc) {
1036                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1037                 goto out_remove;
1038         }
1039         card->state = CARD_STATE_SOFTSETUP;
1040         netif_carrier_on(card->dev);
1041
1042         qeth_set_allowed_threads(card, 0xffffffff, 0);
1043         if (recover_flag == CARD_STATE_RECOVER) {
1044                 if (recovery_mode &&
1045                     card->info.type != QETH_CARD_TYPE_OSN) {
1046                         qeth_l2_open(card->dev);
1047                 } else {
1048                         rtnl_lock();
1049                         dev_open(card->dev);
1050                         rtnl_unlock();
1051                 }
1052                 /* this also sets saved unicast addresses */
1053                 qeth_l2_set_multicast_list(card->dev);
1054         }
1055         /* let user_space know that device is online */
1056         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1057         return 0;
1058 out_remove:
1059         card->use_hard_stop = 1;
1060         qeth_l2_stop_card(card, 0);
1061         ccw_device_set_offline(CARD_DDEV(card));
1062         ccw_device_set_offline(CARD_WDEV(card));
1063         ccw_device_set_offline(CARD_RDEV(card));
1064         if (recover_flag == CARD_STATE_RECOVER)
1065                 card->state = CARD_STATE_RECOVER;
1066         else
1067                 card->state = CARD_STATE_DOWN;
1068         return -ENODEV;
1069 }
1070
1071 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1072 {
1073         return __qeth_l2_set_online(gdev, 0);
1074 }
1075
1076 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1077                                         int recovery_mode)
1078 {
1079         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1080         int rc = 0, rc2 = 0, rc3 = 0;
1081         enum qeth_card_states recover_flag;
1082
1083         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1084         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1085
1086         if (card->dev && netif_carrier_ok(card->dev))
1087                 netif_carrier_off(card->dev);
1088         recover_flag = card->state;
1089         qeth_l2_stop_card(card, recovery_mode);
1090         rc  = ccw_device_set_offline(CARD_DDEV(card));
1091         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1092         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1093         if (!rc)
1094                 rc = (rc2) ? rc2 : rc3;
1095         if (rc)
1096                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1097         if (recover_flag == CARD_STATE_UP)
1098                 card->state = CARD_STATE_RECOVER;
1099         /* let user_space know that device is offline */
1100         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1101         return 0;
1102 }
1103
1104 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1105 {
1106         return __qeth_l2_set_offline(cgdev, 0);
1107 }
1108
1109 static int qeth_l2_recover(void *ptr)
1110 {
1111         struct qeth_card *card;
1112         int rc = 0;
1113
1114         card = (struct qeth_card *) ptr;
1115         QETH_DBF_TEXT(TRACE, 2, "recover1");
1116         QETH_DBF_HEX(TRACE, 2, &card, sizeof(void *));
1117         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1118                 return 0;
1119         QETH_DBF_TEXT(TRACE, 2, "recover2");
1120         dev_warn(&card->gdev->dev,
1121                 "A recovery process has been started for the device\n");
1122         card->use_hard_stop = 1;
1123         __qeth_l2_set_offline(card->gdev, 1);
1124         rc = __qeth_l2_set_online(card->gdev, 1);
1125         /* don't run another scheduled recovery */
1126         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1127         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1128         if (!rc)
1129                 dev_info(&card->gdev->dev,
1130                         "Device successfully recovered!\n");
1131         else {
1132                 if (card->dev) {
1133                         rtnl_lock();
1134                         dev_close(card->dev);
1135                         rtnl_unlock();
1136                 }
1137                 dev_warn(&card->gdev->dev, "The qeth device driver "
1138                         "failed to recover an error on the device\n");
1139         }
1140         return 0;
1141 }
1142
1143 static int __init qeth_l2_init(void)
1144 {
1145         pr_info("register layer 2 discipline\n");
1146         return 0;
1147 }
1148
1149 static void __exit qeth_l2_exit(void)
1150 {
1151         pr_info("unregister layer 2 discipline\n");
1152 }
1153
1154 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1155 {
1156         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1157         qeth_qdio_clear_card(card, 0);
1158         qeth_clear_qdio_buffers(card);
1159 }
1160
1161 struct ccwgroup_driver qeth_l2_ccwgroup_driver = {
1162         .probe = qeth_l2_probe_device,
1163         .remove = qeth_l2_remove_device,
1164         .set_online = qeth_l2_set_online,
1165         .set_offline = qeth_l2_set_offline,
1166         .shutdown = qeth_l2_shutdown,
1167 };
1168 EXPORT_SYMBOL_GPL(qeth_l2_ccwgroup_driver);
1169
1170 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1171                            struct qeth_cmd_buffer *iob)
1172 {
1173         unsigned long flags;
1174         int rc = 0;
1175
1176         QETH_DBF_TEXT(TRACE, 5, "osndctrd");
1177
1178         wait_event(card->wait_q,
1179                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1180         qeth_prepare_control_data(card, len, iob);
1181         QETH_DBF_TEXT(TRACE, 6, "osnoirqp");
1182         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1183         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1184                               (addr_t) iob, 0, 0);
1185         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1186         if (rc) {
1187                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1188                            "ccw_device_start rc = %i\n", rc);
1189                 QETH_DBF_TEXT_(TRACE, 2, " err%d", rc);
1190                 qeth_release_buffer(iob->channel, iob);
1191                 atomic_set(&card->write.irq_pending, 0);
1192                 wake_up(&card->wait_q);
1193         }
1194         return rc;
1195 }
1196
1197 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1198                         struct qeth_cmd_buffer *iob, int data_len)
1199 {
1200         u16 s1, s2;
1201
1202         QETH_DBF_TEXT(TRACE, 4, "osndipa");
1203
1204         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1205         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1206         s2 = (u16)data_len;
1207         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1208         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1209         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1210         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1211         return qeth_osn_send_control_data(card, s1, iob);
1212 }
1213
1214 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1215 {
1216         struct qeth_cmd_buffer *iob;
1217         struct qeth_card *card;
1218         int rc;
1219
1220         QETH_DBF_TEXT(TRACE, 2, "osnsdmc");
1221         if (!dev)
1222                 return -ENODEV;
1223         card = dev->ml_priv;
1224         if (!card)
1225                 return -ENODEV;
1226         if ((card->state != CARD_STATE_UP) &&
1227             (card->state != CARD_STATE_SOFTSETUP))
1228                 return -ENODEV;
1229         iob = qeth_wait_for_buffer(&card->write);
1230         memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1231         rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1232         return rc;
1233 }
1234 EXPORT_SYMBOL(qeth_osn_assist);
1235
1236 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1237                   int (*assist_cb)(struct net_device *, void *),
1238                   int (*data_cb)(struct sk_buff *))
1239 {
1240         struct qeth_card *card;
1241
1242         QETH_DBF_TEXT(TRACE, 2, "osnreg");
1243         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1244         if (*dev == NULL)
1245                 return -ENODEV;
1246         card = (*dev)->ml_priv;
1247         if (!card)
1248                 return -ENODEV;
1249         if ((assist_cb == NULL) || (data_cb == NULL))
1250                 return -EINVAL;
1251         card->osn_info.assist_cb = assist_cb;
1252         card->osn_info.data_cb = data_cb;
1253         return 0;
1254 }
1255 EXPORT_SYMBOL(qeth_osn_register);
1256
1257 void qeth_osn_deregister(struct net_device *dev)
1258 {
1259         struct qeth_card *card;
1260
1261         QETH_DBF_TEXT(TRACE, 2, "osndereg");
1262         if (!dev)
1263                 return;
1264         card = dev->ml_priv;
1265         if (!card)
1266                 return;
1267         card->osn_info.assist_cb = NULL;
1268         card->osn_info.data_cb = NULL;
1269         return;
1270 }
1271 EXPORT_SYMBOL(qeth_osn_deregister);
1272
1273 module_init(qeth_l2_init);
1274 module_exit(qeth_l2_exit);
1275 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1276 MODULE_DESCRIPTION("qeth layer 2 discipline");
1277 MODULE_LICENSE("GPL");