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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
  25 static int qeth_l2_set_offline(struct ccwgroup_device *);
  26 static int qeth_l2_stop(struct net_device *);
  27 static int qeth_l2_send_delmac(struct qeth_card *, __u8 *);
  28 static int qeth_l2_send_setdelmac(struct qeth_card *, __u8 *,
  29                            enum qeth_ipa_cmds,
  30                            int (*reply_cb) (struct qeth_card *,
  31                                             struct qeth_reply*,
  32                                             unsigned long));
  33 static void qeth_l2_set_multicast_list(struct net_device *);
  34 static int qeth_l2_recover(void *);
  35
  36 static int qeth_l2_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
  37 {
  38         struct qeth_card *card = dev->ml_priv;
  39         struct mii_ioctl_data *mii_data;
  40         int rc = 0;
  41
  42         if (!card)
  43                 return -ENODEV;
  44
  45         if ((card->state != CARD_STATE_UP) &&
  46                 (card->state != CARD_STATE_SOFTSETUP))
  47                 return -ENODEV;
  48
  49         if (card->info.type == QETH_CARD_TYPE_OSN)
  50                 return -EPERM;
  51
  52         switch (cmd) {
  53         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
  54                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
  55                 break;
  56         case SIOC_QETH_GET_CARD_TYPE:
  57                 if ((card->info.type == QETH_CARD_TYPE_OSAE) &&
  58                     !card->info.guestlan)
  59                         return 1;
  60                 return 0;
  61                 break;
  62         case SIOCGMIIPHY:
  63                 mii_data = if_mii(rq);
  64                 mii_data->phy_id = 0;
  65                 break;
  66         case SIOCGMIIREG:
  67                 mii_data = if_mii(rq);
  68                 if (mii_data->phy_id != 0)
  69                         rc = -EINVAL;
  70                 else
  71                         mii_data->val_out = qeth_mdio_read(dev,
  72                                 mii_data->phy_id, mii_data->reg_num);
  73                 break;
  74         default:
  75                 rc = -EOPNOTSUPP;
  76         }
  77         if (rc)
  78                 QETH_DBF_TEXT_(TRACE, 2, "ioce%d", rc);
  79         return rc;
  80 }
  81
  82 static int qeth_l2_verify_dev(struct net_device *dev)
  83 {
  84         struct qeth_card *card;
  85         unsigned long flags;
  86         int rc = 0;
  87
  88         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
  89         list_for_each_entry(card, &qeth_core_card_list.list, list) {
  90                 if (card->dev == dev) {
  91                         rc = QETH_REAL_CARD;
  92                         break;
  93                 }
  94         }
  95         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
  96
  97         return rc;
  98 }
  99
 100 static struct net_device *qeth_l2_netdev_by_devno(unsigned char *read_dev_no)
 101 {
 102         struct qeth_card *card;
 103         struct net_device *ndev;
 104         __u16 temp_dev_no;
 105         unsigned long flags;
 106         struct ccw_dev_id read_devid;
 107
 108         ndev = NULL;
 109         memcpy(&temp_dev_no, read_dev_no, 2);
 110         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
 111         list_for_each_entry(card, &qeth_core_card_list.list, list) {
 112                 ccw_device_get_id(CARD_RDEV(card), &read_devid);
 113                 if (read_devid.devno == temp_dev_no) {
 114                         ndev = card->dev;
 115                         break;
 116                 }
 117         }
 118         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
 119         return ndev;
 120 }
 121
 122 static int qeth_l2_send_setgroupmac_cb(struct qeth_card *card,
 123                                 struct qeth_reply *reply,
 124                                 unsigned long data)
 125 {
 126         struct qeth_ipa_cmd *cmd;
 127         __u8 *mac;
 128
 129         QETH_DBF_TEXT(TRACE, 2, "L2Sgmacb");
 130         cmd = (struct qeth_ipa_cmd *) data;
 131         mac = &cmd->data.setdelmac.mac[0];
 132         /* MAC already registered, needed in couple/uncouple case */
 133         if (cmd->hdr.return_code == 0x2005) {
 134                 QETH_DBF_MESSAGE(2, "Group MAC %pM already existing on %s \n",
 135                           mac, QETH_CARD_IFNAME(card));
 136                 cmd->hdr.return_code = 0;
 137         }
 138         if (cmd->hdr.return_code)
 139                 QETH_DBF_MESSAGE(2, "Could not set group MAC %pM on %s: %x\n",
 140                           mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 141         return 0;
 142 }
 143
 144 static int qeth_l2_send_setgroupmac(struct qeth_card *card, __u8 *mac)
 145 {
 146         QETH_DBF_TEXT(TRACE, 2, "L2Sgmac");
 147         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETGMAC,
 148                                           qeth_l2_send_setgroupmac_cb);
 149 }
 150
 151 static int qeth_l2_send_delgroupmac_cb(struct qeth_card *card,
 152                                 struct qeth_reply *reply,
 153                                 unsigned long data)
 154 {
 155         struct qeth_ipa_cmd *cmd;
 156         __u8 *mac;
 157
 158         QETH_DBF_TEXT(TRACE, 2, "L2Dgmacb");
 159         cmd = (struct qeth_ipa_cmd *) data;
 160         mac = &cmd->data.setdelmac.mac[0];
 161         if (cmd->hdr.return_code)
 162                 QETH_DBF_MESSAGE(2, "Could not delete group MAC %pM on %s: %x\n",
 163                           mac, QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 164         return 0;
 165 }
 166
 167 static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac)
 168 {
 169         QETH_DBF_TEXT(TRACE, 2, "L2Dgmac");
 170         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELGMAC,
 171                                           qeth_l2_send_delgroupmac_cb);
 172 }
 173
 174 static void qeth_l2_add_mc(struct qeth_card *card, __u8 *mac, int vmac)
 175 {
 176         struct qeth_mc_mac *mc;
 177         int rc;
 178
 179         mc = kmalloc(sizeof(struct qeth_mc_mac), GFP_ATOMIC);
 180
 181         if (!mc)
 182                 return;
 183
 184         memcpy(mc->mc_addr, mac, OSA_ADDR_LEN);
 185         mc->mc_addrlen = OSA_ADDR_LEN;
 186         mc->is_vmac = vmac;
 187
 188         if (vmac) {
 189                 rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
 190                                         NULL);
 191         } else {
 192                 rc = qeth_l2_send_setgroupmac(card, mac);
 193         }
 194
 195         if (!rc)
 196                 list_add_tail(&mc->list, &card->mc_list);
 197         else
 198                 kfree(mc);
 199 }
 200
 201 static void qeth_l2_del_all_mc(struct qeth_card *card)
 202 {
 203         struct qeth_mc_mac *mc, *tmp;
 204
 205         spin_lock_bh(&card->mclock);
 206         list_for_each_entry_safe(mc, tmp, &card->mc_list, list) {
 207                 if (mc->is_vmac)
 208                         qeth_l2_send_setdelmac(card, mc->mc_addr,
 209                                         IPA_CMD_DELVMAC, NULL);
 210                 else
 211                         qeth_l2_send_delgroupmac(card, mc->mc_addr);
 212                 list_del(&mc->list);
 213                 kfree(mc);
 214         }
 215         spin_unlock_bh(&card->mclock);
 216 }
 217
 218 static void qeth_l2_get_packet_type(struct qeth_card *card,
 219                         struct qeth_hdr *hdr, struct sk_buff *skb)
 220 {
 221         __u16 hdr_mac;
 222
 223         if (!memcmp(skb->data + QETH_HEADER_SIZE,
 224                     skb->dev->broadcast, 6)) {
 225                 /* broadcast? */
 226                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 227                 return;
 228         }
 229         hdr_mac = *((__u16 *)skb->data);
 230         /* tr multicast? */
 231         switch (card->info.link_type) {
 232         case QETH_LINK_TYPE_HSTR:
 233         case QETH_LINK_TYPE_LANE_TR:
 234                 if ((hdr_mac == QETH_TR_MAC_NC) ||
 235                     (hdr_mac == QETH_TR_MAC_C))
 236                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 237                 else
 238                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 239                 break;
 240                 /* eth or so multicast? */
 241         default:
 242                 if ((hdr_mac == QETH_ETH_MAC_V4) ||
 243                      (hdr_mac == QETH_ETH_MAC_V6))
 244                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 245                 else
 246                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 247         }
 248 }
 249
 250 static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
 251                         struct sk_buff *skb, int ipv, int cast_type)
 252 {
 253         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
 254
 255         memset(hdr, 0, sizeof(struct qeth_hdr));
 256         hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
 257
 258         /* set byte byte 3 to casting flags */
 259         if (cast_type == RTN_MULTICAST)
 260                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 261         else if (cast_type == RTN_BROADCAST)
 262                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 263         else
 264                 qeth_l2_get_packet_type(card, hdr, skb);
 265
 266         hdr->hdr.l2.pkt_length = skb->len-QETH_HEADER_SIZE;
 267         /* VSWITCH relies on the VLAN
 268          * information to be present in
 269          * the QDIO header */
 270         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
 271                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
 272                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
 273         }
 274 }
 275
 276 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
 277                         struct qeth_reply *reply, unsigned long data)
 278 {
 279         struct qeth_ipa_cmd *cmd;
 280
 281         QETH_DBF_TEXT(TRACE, 2, "L2sdvcb");
 282         cmd = (struct qeth_ipa_cmd *) data;
 283         if (cmd->hdr.return_code) {
 284                 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x. "
 285                           "Continuing\n", cmd->data.setdelvlan.vlan_id,
 286                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 287                 QETH_DBF_TEXT_(TRACE, 2, "L2VL%4x", cmd->hdr.command);
 288                 QETH_DBF_TEXT_(TRACE, 2, "L2%s", CARD_BUS_ID(card));
 289                 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
 290         }
 291         return 0;
 292 }
 293
 294 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
 295                                 enum qeth_ipa_cmds ipacmd)
 296 {
 297         struct qeth_ipa_cmd *cmd;
 298         struct qeth_cmd_buffer *iob;
 299
 300         QETH_DBF_TEXT_(TRACE, 4, "L2sdv%x", ipacmd);
 301         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 302         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 303         cmd->data.setdelvlan.vlan_id = i;
 304         return qeth_send_ipa_cmd(card, iob,
 305                                  qeth_l2_send_setdelvlan_cb, NULL);
 306 }
 307
 308 static void qeth_l2_process_vlans(struct qeth_card *card, int clear)
 309 {
 310         struct qeth_vlan_vid *id;
 311         QETH_DBF_TEXT(TRACE, 3, "L2prcvln");
 312         spin_lock_bh(&card->vlanlock);
 313         list_for_each_entry(id, &card->vid_list, list) {
 314                 if (clear)
 315                         qeth_l2_send_setdelvlan(card, id->vid,
 316                                 IPA_CMD_DELVLAN);
 317                 else
 318                         qeth_l2_send_setdelvlan(card, id->vid,
 319                                 IPA_CMD_SETVLAN);
 320         }
 321         spin_unlock_bh(&card->vlanlock);
 322 }
 323
 324 static void qeth_l2_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
 325 {
 326         struct qeth_card *card = dev->ml_priv;
 327         struct qeth_vlan_vid *id;
 328
 329         QETH_DBF_TEXT_(TRACE, 4, "aid:%d", vid);
 330         id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
 331         if (id) {
 332                 id->vid = vid;
 333                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
 334                 spin_lock_bh(&card->vlanlock);
 335                 list_add_tail(&id->list, &card->vid_list);
 336                 spin_unlock_bh(&card->vlanlock);
 337         }
 338 }
 339
 340 static void qeth_l2_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
 341 {
 342         struct qeth_vlan_vid *id, *tmpid = NULL;
 343         struct qeth_card *card = dev->ml_priv;
 344
 345         QETH_DBF_TEXT_(TRACE, 4, "kid:%d", vid);
 346         spin_lock_bh(&card->vlanlock);
 347         list_for_each_entry(id, &card->vid_list, list) {
 348                 if (id->vid == vid) {
 349                         list_del(&id->list);
 350                         tmpid = id;
 351                         break;
 352                 }
 353         }
 354         spin_unlock_bh(&card->vlanlock);
 355         if (tmpid) {
 356                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 357                 kfree(tmpid);
 358         }
 359         qeth_l2_set_multicast_list(card->dev);
 360 }
 361
 362 static int qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
 363 {
 364         int rc = 0;
 365
 366         QETH_DBF_TEXT(SETUP , 2, "stopcard");
 367         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 368
 369         qeth_set_allowed_threads(card, 0, 1);
 370         if (card->read.state == CH_STATE_UP &&
 371             card->write.state == CH_STATE_UP &&
 372             (card->state == CARD_STATE_UP)) {
 373                 if (recovery_mode &&
 374                     card->info.type != QETH_CARD_TYPE_OSN) {
 375                         qeth_l2_stop(card->dev);
 376                 } else {
 377                         rtnl_lock();
 378                         dev_close(card->dev);
 379                         rtnl_unlock();
 380                 }
 381                 if (!card->use_hard_stop) {
 382                         __u8 *mac = &card->dev->dev_addr[0];
 383                         rc = qeth_l2_send_delmac(card, mac);
 384                         QETH_DBF_TEXT_(SETUP, 2, "Lerr%d", rc);
 385                 }
 386                 card->state = CARD_STATE_SOFTSETUP;
 387         }
 388         if (card->state == CARD_STATE_SOFTSETUP) {
 389                 qeth_l2_process_vlans(card, 1);
 390                 if (!card->use_hard_stop)
 391                         qeth_l2_del_all_mc(card);
 392                 qeth_clear_ipacmd_list(card);
 393                 card->state = CARD_STATE_HARDSETUP;
 394         }
 395         if (card->state == CARD_STATE_HARDSETUP) {
 396                 qeth_qdio_clear_card(card, 0);
 397                 qeth_clear_qdio_buffers(card);
 398                 qeth_clear_working_pool_list(card);
 399                 card->state = CARD_STATE_DOWN;
 400         }
 401         if (card->state == CARD_STATE_DOWN) {
 402                 qeth_clear_cmd_buffers(&card->read);
 403                 qeth_clear_cmd_buffers(&card->write);
 404         }
 405         card->use_hard_stop = 0;
 406         return rc;
 407 }
 408
 409 static void qeth_l2_process_inbound_buffer(struct qeth_card *card,
 410                             struct qeth_qdio_buffer *buf, int index)
 411 {
 412         struct qdio_buffer_element *element;
 413         struct sk_buff *skb;
 414         struct qeth_hdr *hdr;
 415         int offset;
 416         unsigned int len;
 417
 418         /* get first element of current buffer */
 419         element = (struct qdio_buffer_element *)&buf->buffer->element[0];
 420         offset = 0;
 421         if (card->options.performance_stats)
 422                 card->perf_stats.bufs_rec++;
 423         while ((skb = qeth_core_get_next_skb(card, buf->buffer, &element,
 424                                        &offset, &hdr))) {
 425                 skb->dev = card->dev;
 426                 /* is device UP ? */
 427                 if (!(card->dev->flags & IFF_UP)) {
 428                         dev_kfree_skb_any(skb);
 429                         continue;
 430                 }
 431
 432                 switch (hdr->hdr.l2.id) {
 433                 case QETH_HEADER_TYPE_LAYER2:
 434                         skb->pkt_type = PACKET_HOST;
 435                         skb->protocol = eth_type_trans(skb, skb->dev);
 436                         if (card->options.checksum_type == NO_CHECKSUMMING)
 437                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 438                         else
 439                                 skb->ip_summed = CHECKSUM_NONE;
 440                         if (skb->protocol == htons(ETH_P_802_2))
 441                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
 442                         len = skb->len;
 443                         netif_rx(skb);
 444                         break;
 445                 case QETH_HEADER_TYPE_OSN:
 446                         if (card->info.type == QETH_CARD_TYPE_OSN) {
 447                                 skb_push(skb, sizeof(struct qeth_hdr));
 448                                 skb_copy_to_linear_data(skb, hdr,
 449                                                 sizeof(struct qeth_hdr));
 450                                 len = skb->len;
 451                                 card->osn_info.data_cb(skb);
 452                                 break;
 453                         }
 454                         /* else unknown */
 455                 default:
 456                         dev_kfree_skb_any(skb);
 457                         QETH_DBF_TEXT(TRACE, 3, "inbunkno");
 458                         QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
 459                         continue;
 460                 }
 461                 card->dev->last_rx = jiffies;
 462                 card->stats.rx_packets++;
 463                 card->stats.rx_bytes += len;
 464         }
 465 }
 466
 467 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
 468                            enum qeth_ipa_cmds ipacmd,
 469                            int (*reply_cb) (struct qeth_card *,
 470                                             struct qeth_reply*,
 471                                             unsigned long))
 472 {
 473         struct qeth_ipa_cmd *cmd;
 474         struct qeth_cmd_buffer *iob;
 475
 476         QETH_DBF_TEXT(TRACE, 2, "L2sdmac");
 477         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 478         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 479         cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
 480         memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
 481         return qeth_send_ipa_cmd(card, iob, reply_cb, NULL);
 482 }
 483
 484 static int qeth_l2_send_setmac_cb(struct qeth_card *card,
 485                            struct qeth_reply *reply,
 486                            unsigned long data)
 487 {
 488         struct qeth_ipa_cmd *cmd;
 489
 490         QETH_DBF_TEXT(TRACE, 2, "L2Smaccb");
 491         cmd = (struct qeth_ipa_cmd *) data;
 492         if (cmd->hdr.return_code) {
 493                 QETH_DBF_TEXT_(TRACE, 2, "L2er%x", cmd->hdr.return_code);
 494                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 495                 cmd->hdr.return_code = -EIO;
 496         } else {
 497                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 498                 memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
 499                        OSA_ADDR_LEN);
 500                 dev_info(&card->gdev->dev,
 501                         "MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x "
 502                         "successfully registered on device %s\n",
 503                         card->dev->dev_addr[0], card->dev->dev_addr[1],
 504                         card->dev->dev_addr[2], card->dev->dev_addr[3],
 505                         card->dev->dev_addr[4], card->dev->dev_addr[5],
 506                         card->dev->name);
 507         }
 508         return 0;
 509 }
 510
 511 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
 512 {
 513         QETH_DBF_TEXT(TRACE, 2, "L2Setmac");
 514         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
 515                                           qeth_l2_send_setmac_cb);
 516 }
 517
 518 static int qeth_l2_send_delmac_cb(struct qeth_card *card,
 519                            struct qeth_reply *reply,
 520                            unsigned long data)
 521 {
 522         struct qeth_ipa_cmd *cmd;
 523
 524         QETH_DBF_TEXT(TRACE, 2, "L2Dmaccb");
 525         cmd = (struct qeth_ipa_cmd *) data;
 526         if (cmd->hdr.return_code) {
 527                 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
 528                 cmd->hdr.return_code = -EIO;
 529                 return 0;
 530         }
 531         card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 532
 533         return 0;
 534 }
 535
 536 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
 537 {
 538         QETH_DBF_TEXT(TRACE, 2, "L2Delmac");
 539         if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
 540                 return 0;
 541         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
 542                                           qeth_l2_send_delmac_cb);
 543 }
 544
 545 static int qeth_l2_request_initial_mac(struct qeth_card *card)
 546 {
 547         int rc = 0;
 548         char vendor_pre[] = {0x02, 0x00, 0x00};
 549
 550         QETH_DBF_TEXT(SETUP, 2, "doL2init");
 551         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
 552
 553         rc = qeth_query_setadapterparms(card);
 554         if (rc) {
 555                 QETH_DBF_MESSAGE(2, "could not query adapter parameters on "
 556                         "device %s: x%x\n", CARD_BUS_ID(card), rc);
 557         }
 558
 559         if ((card->info.type == QETH_CARD_TYPE_IQD) ||
 560             (card->info.guestlan)) {
 561                 rc = qeth_setadpparms_change_macaddr(card);
 562                 if (rc) {
 563                         QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
 564                                 "device %s: x%x\n", CARD_BUS_ID(card), rc);
 565                         QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 566                         return rc;
 567                 }
 568                 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN);
 569         } else {
 570                 random_ether_addr(card->dev->dev_addr);
 571                 memcpy(card->dev->dev_addr, vendor_pre, 3);
 572         }
 573         return 0;
 574 }
 575
 576 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 577 {
 578         struct sockaddr *addr = p;
 579         struct qeth_card *card = dev->ml_priv;
 580         int rc = 0;
 581
 582         QETH_DBF_TEXT(TRACE, 3, "setmac");
 583
 584         if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
 585                 QETH_DBF_TEXT(TRACE, 3, "setmcINV");
 586                 return -EOPNOTSUPP;
 587         }
 588
 589         if (card->info.type == QETH_CARD_TYPE_OSN) {
 590                 QETH_DBF_TEXT(TRACE, 3, "setmcOSN");
 591                 return -EOPNOTSUPP;
 592         }
 593         QETH_DBF_TEXT_(TRACE, 3, "%s", CARD_BUS_ID(card));
 594         QETH_DBF_HEX(TRACE, 3, addr->sa_data, OSA_ADDR_LEN);
 595         rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
 596         if (!rc)
 597                 rc = qeth_l2_send_setmac(card, addr->sa_data);
 598         return rc;
 599 }
 600
 601 static void qeth_l2_set_multicast_list(struct net_device *dev)
 602 {
 603         struct qeth_card *card = dev->ml_priv;
 604         struct dev_addr_list *dm;
 605
 606         if (card->info.type == QETH_CARD_TYPE_OSN)
 607                 return ;
 608
 609         QETH_DBF_TEXT(TRACE, 3, "setmulti");
 610         qeth_l2_del_all_mc(card);
 611         spin_lock_bh(&card->mclock);
 612         for (dm = dev->mc_list; dm; dm = dm->next)
 613                 qeth_l2_add_mc(card, dm->da_addr, 0);
 614
 615         for (dm = dev->uc_list; dm; dm = dm->next)
 616                 qeth_l2_add_mc(card, dm->da_addr, 1);
 617
 618         spin_unlock_bh(&card->mclock);
 619         if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
 620                 return;
 621         qeth_setadp_promisc_mode(card);
 622 }
 623
 624 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 625 {
 626         int rc;
 627         struct qeth_hdr *hdr = NULL;
 628         int elements = 0;
 629         struct qeth_card *card = dev->ml_priv;
 630         struct sk_buff *new_skb = skb;
 631         int ipv = qeth_get_ip_version(skb);
 632         int cast_type = qeth_get_cast_type(card, skb);
 633         struct qeth_qdio_out_q *queue = card->qdio.out_qs
 634                 [qeth_get_priority_queue(card, skb, ipv, cast_type)];
 635         int tx_bytes = skb->len;
 636         int data_offset = -1;
 637         int elements_needed = 0;
 638         int hd_len = 0;
 639
 640         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
 641                 card->stats.tx_carrier_errors++;
 642                 goto tx_drop;
 643         }
 644
 645         if ((card->info.type == QETH_CARD_TYPE_OSN) &&
 646             (skb->protocol == htons(ETH_P_IPV6)))
 647                 goto tx_drop;
 648
 649         if (card->options.performance_stats) {
 650                 card->perf_stats.outbound_cnt++;
 651                 card->perf_stats.outbound_start_time = qeth_get_micros();
 652         }
 653         netif_stop_queue(dev);
 654
 655         if (card->info.type == QETH_CARD_TYPE_OSN)
 656                 hdr = (struct qeth_hdr *)skb->data;
 657         else {
 658                 if (card->info.type == QETH_CARD_TYPE_IQD) {
 659                         new_skb = skb;
 660                         data_offset = ETH_HLEN;
 661                         hd_len = ETH_HLEN;
 662                         hdr = kmem_cache_alloc(qeth_core_header_cache,
 663                                                 GFP_ATOMIC);
 664                         if (!hdr)
 665                                 goto tx_drop;
 666                         elements_needed++;
 667                         skb_reset_mac_header(new_skb);
 668                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 669                         hdr->hdr.l2.pkt_length = new_skb->len;
 670                         memcpy(((char *)hdr) + sizeof(struct qeth_hdr),
 671                                 skb_mac_header(new_skb), ETH_HLEN);
 672                 } else {
 673                         /* create a clone with writeable headroom */
 674                         new_skb = skb_realloc_headroom(skb,
 675                                                 sizeof(struct qeth_hdr));
 676                         if (!new_skb)
 677                                 goto tx_drop;
 678                         hdr = (struct qeth_hdr *)skb_push(new_skb,
 679                                                 sizeof(struct qeth_hdr));
 680                         skb_set_mac_header(new_skb, sizeof(struct qeth_hdr));
 681                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 682                 }
 683         }
 684
 685         elements = qeth_get_elements_no(card, (void *)hdr, new_skb,
 686                                                 elements_needed);
 687         if (!elements) {
 688                 if (data_offset >= 0)
 689                         kmem_cache_free(qeth_core_header_cache, hdr);
 690                 goto tx_drop;
 691         }
 692
 693         if (card->info.type != QETH_CARD_TYPE_IQD)
 694                 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
 695                                          elements);
 696         else
 697                 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
 698                                         elements, data_offset, hd_len);
 699         if (!rc) {
 700                 card->stats.tx_packets++;
 701                 card->stats.tx_bytes += tx_bytes;
 702                 if (new_skb != skb)
 703                         dev_kfree_skb_any(skb);
 704         } else {
 705                 if (data_offset >= 0)
 706                         kmem_cache_free(qeth_core_header_cache, hdr);
 707
 708                 if (rc == -EBUSY) {
 709                         if (new_skb != skb)
 710                                 dev_kfree_skb_any(new_skb);
 711                         return NETDEV_TX_BUSY;
 712                 } else
 713                         goto tx_drop;
 714         }
 715
 716         netif_wake_queue(dev);
 717         if (card->options.performance_stats)
 718                 card->perf_stats.outbound_time += qeth_get_micros() -
 719                         card->perf_stats.outbound_start_time;
 720         return rc;
 721
 722 tx_drop:
 723         card->stats.tx_dropped++;
 724         card->stats.tx_errors++;
 725         if ((new_skb != skb) && new_skb)
 726                 dev_kfree_skb_any(new_skb);
 727         dev_kfree_skb_any(skb);
 728         netif_wake_queue(dev);
 729         return NETDEV_TX_OK;
 730 }
 731
 732 static void qeth_l2_qdio_input_handler(struct ccw_device *ccwdev,
 733                         unsigned int qdio_err, unsigned int queue,
 734                         int first_element, int count, unsigned long card_ptr)
 735 {
 736         struct net_device *net_dev;
 737         struct qeth_card *card;
 738         struct qeth_qdio_buffer *buffer;
 739         int index;
 740         int i;
 741
 742         card = (struct qeth_card *) card_ptr;
 743         net_dev = card->dev;
 744         if (card->options.performance_stats) {
 745                 card->perf_stats.inbound_cnt++;
 746                 card->perf_stats.inbound_start_time = qeth_get_micros();
 747         }
 748         if (qdio_err & QDIO_ERROR_ACTIVATE_CHECK_CONDITION) {
 749                 QETH_DBF_TEXT(TRACE, 1, "qdinchk");
 750                 QETH_DBF_TEXT_(TRACE, 1, "%s", CARD_BUS_ID(card));
 751                 QETH_DBF_TEXT_(TRACE, 1, "%04X%04X", first_element,
 752                                 count);
 753                 QETH_DBF_TEXT_(TRACE, 1, "%04X", queue);
 754                 qeth_schedule_recovery(card);
 755                 return;
 756         }
 757         for (i = first_element; i < (first_element + count); ++i) {
 758                 index = i % QDIO_MAX_BUFFERS_PER_Q;
 759                 buffer = &card->qdio.in_q->bufs[index];
 760                 if (!(qdio_err &&
 761                       qeth_check_qdio_errors(buffer->buffer, qdio_err, "qinerr")))
 762                         qeth_l2_process_inbound_buffer(card, buffer, index);
 763                 /* clear buffer and give back to hardware */
 764                 qeth_put_buffer_pool_entry(card, buffer->pool_entry);
 765                 qeth_queue_input_buffer(card, index);
 766         }
 767         if (card->options.performance_stats)
 768                 card->perf_stats.inbound_time += qeth_get_micros() -
 769                         card->perf_stats.inbound_start_time;
 770 }
 771
 772 static int qeth_l2_open(struct net_device *dev)
 773 {
 774         struct qeth_card *card = dev->ml_priv;
 775
 776         QETH_DBF_TEXT(TRACE, 4, "qethopen");
 777         if (card->state != CARD_STATE_SOFTSETUP)
 778                 return -ENODEV;
 779
 780         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
 781              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
 782                 QETH_DBF_TEXT(TRACE, 4, "nomacadr");
 783                 return -EPERM;
 784         }
 785         card->data.state = CH_STATE_UP;
 786         card->state = CARD_STATE_UP;
 787         netif_start_queue(dev);
 788
 789         if (!card->lan_online && netif_carrier_ok(dev))
 790                 netif_carrier_off(dev);
 791         return 0;
 792 }
 793
 794
 795 static int qeth_l2_stop(struct net_device *dev)
 796 {
 797         struct qeth_card *card = dev->ml_priv;
 798
 799         QETH_DBF_TEXT(TRACE, 4, "qethstop");
 800         netif_tx_disable(dev);
 801         if (card->state == CARD_STATE_UP)
 802                 card->state = CARD_STATE_SOFTSETUP;
 803         return 0;
 804 }
 805
 806 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 807 {
 808         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 809
 810         INIT_LIST_HEAD(&card->vid_list);
 811         INIT_LIST_HEAD(&card->mc_list);
 812         card->options.layer2 = 1;
 813         card->discipline.input_handler = (qdio_handler_t *)
 814                 qeth_l2_qdio_input_handler;
 815         card->discipline.output_handler = (qdio_handler_t *)
 816                 qeth_qdio_output_handler;
 817         card->discipline.recover = qeth_l2_recover;
 818         return 0;
 819 }
 820
 821 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
 822 {
 823         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
 824
 825         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 826
 827         if (cgdev->state == CCWGROUP_ONLINE) {
 828                 card->use_hard_stop = 1;
 829                 qeth_l2_set_offline(cgdev);
 830         }
 831
 832         if (card->dev) {
 833                 unregister_netdev(card->dev);
 834                 card->dev = NULL;
 835         }
 836
 837         qeth_l2_del_all_mc(card);
 838         return;
 839 }
 840
 841 static struct ethtool_ops qeth_l2_ethtool_ops = {
 842         .get_link = ethtool_op_get_link,
 843         .get_strings = qeth_core_get_strings,
 844         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 845         .get_stats_count = qeth_core_get_stats_count,
 846         .get_drvinfo = qeth_core_get_drvinfo,
 847         .get_settings = qeth_core_ethtool_get_settings,
 848 };
 849
 850 static struct ethtool_ops qeth_l2_osn_ops = {
 851         .get_strings = qeth_core_get_strings,
 852         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 853         .get_stats_count = qeth_core_get_stats_count,
 854         .get_drvinfo = qeth_core_get_drvinfo,
 855 };
 856
 857 static const struct net_device_ops qeth_l2_netdev_ops = {
 858         .ndo_open               = qeth_l2_open,
 859         .ndo_stop               = qeth_l2_stop,
 860         .ndo_get_stats          = qeth_get_stats,
 861         .ndo_start_xmit         = qeth_l2_hard_start_xmit,
 862         .ndo_validate_addr      = eth_validate_addr,
 863         .ndo_set_multicast_list = qeth_l2_set_multicast_list,
 864         .ndo_do_ioctl           = qeth_l2_do_ioctl,
 865         .ndo_set_mac_address    = qeth_l2_set_mac_address,
 866         .ndo_change_mtu         = qeth_change_mtu,
 867         .ndo_vlan_rx_add_vid    = qeth_l2_vlan_rx_add_vid,
 868         .ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,
 869         .ndo_tx_timeout         = qeth_tx_timeout,
 870 };
 871
 872 static int qeth_l2_setup_netdev(struct qeth_card *card)
 873 {
 874         switch (card->info.type) {
 875         case QETH_CARD_TYPE_OSAE:
 876                 card->dev = alloc_etherdev(0);
 877                 break;
 878         case QETH_CARD_TYPE_IQD:
 879                 card->dev = alloc_netdev(0, "hsi%d", ether_setup);
 880                 break;
 881         case QETH_CARD_TYPE_OSN:
 882                 card->dev = alloc_netdev(0, "osn%d", ether_setup);
 883                 card->dev->flags |= IFF_NOARP;
 884                 break;
 885         default:
 886                 card->dev = alloc_etherdev(0);
 887         }
 888
 889         if (!card->dev)
 890                 return -ENODEV;
 891
 892         card->dev->ml_priv = card;
 893         card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
 894         card->dev->mtu = card->info.initial_mtu;
 895         card->dev->netdev_ops = &qeth_l2_netdev_ops;
 896         if (card->info.type != QETH_CARD_TYPE_OSN)
 897                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops);
 898         else
 899                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops);
 900         card->dev->features |= NETIF_F_HW_VLAN_FILTER;
 901         card->info.broadcast_capable = 1;
 902         qeth_l2_request_initial_mac(card);
 903         SET_NETDEV_DEV(card->dev, &card->gdev->dev);
 904         return register_netdev(card->dev);
 905 }
 906
 907 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 908 {
 909         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 910         int rc = 0;
 911         enum qeth_card_states recover_flag;
 912
 913         BUG_ON(!card);
 914         QETH_DBF_TEXT(SETUP, 2, "setonlin");
 915         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 916
 917         qeth_set_allowed_threads(card, QETH_RECOVER_THREAD, 1);
 918         recover_flag = card->state;
 919         rc = ccw_device_set_online(CARD_RDEV(card));
 920         if (rc) {
 921                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 922                 return -EIO;
 923         }
 924         rc = ccw_device_set_online(CARD_WDEV(card));
 925         if (rc) {
 926                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 927                 return -EIO;
 928         }
 929         rc = ccw_device_set_online(CARD_DDEV(card));
 930         if (rc) {
 931                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 932                 return -EIO;
 933         }
 934
 935         rc = qeth_core_hardsetup_card(card);
 936         if (rc) {
 937                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
 938                 goto out_remove;
 939         }
 940
 941         if (!card->dev && qeth_l2_setup_netdev(card))
 942                 goto out_remove;
 943
 944         if (card->info.type != QETH_CARD_TYPE_OSN)
 945                 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
 946
 947         card->state = CARD_STATE_HARDSETUP;
 948         qeth_print_status_message(card);
 949
 950         /* softsetup */
 951         QETH_DBF_TEXT(SETUP, 2, "softsetp");
 952
 953         rc = qeth_send_startlan(card);
 954         if (rc) {
 955                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 956                 if (rc == 0xe080) {
 957                         dev_warn(&card->gdev->dev,
 958                                 "The LAN is offline\n");
 959                         card->lan_online = 0;
 960                 }
 961                 return rc;
 962         } else
 963                 card->lan_online = 1;
 964
 965         if (card->info.type != QETH_CARD_TYPE_OSN) {
 966                 qeth_set_large_send(card, card->options.large_send);
 967                 qeth_l2_process_vlans(card, 0);
 968         }
 969
 970         netif_tx_disable(card->dev);
 971
 972         rc = qeth_init_qdio_queues(card);
 973         if (rc) {
 974                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
 975                 goto out_remove;
 976         }
 977         card->state = CARD_STATE_SOFTSETUP;
 978         netif_carrier_on(card->dev);
 979
 980         qeth_set_allowed_threads(card, 0xffffffff, 0);
 981         if (recover_flag == CARD_STATE_RECOVER) {
 982                 if (recovery_mode &&
 983                     card->info.type != QETH_CARD_TYPE_OSN) {
 984                         qeth_l2_open(card->dev);
 985                 } else {
 986                         rtnl_lock();
 987                         dev_open(card->dev);
 988                         rtnl_unlock();
 989                 }
 990                 /* this also sets saved unicast addresses */
 991                 qeth_l2_set_multicast_list(card->dev);
 992         }
 993         /* let user_space know that device is online */
 994         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
 995         return 0;
 996 out_remove:
 997         card->use_hard_stop = 1;
 998         qeth_l2_stop_card(card, 0);
 999         ccw_device_set_offline(CARD_DDEV(card));
1000         ccw_device_set_offline(CARD_WDEV(card));
1001         ccw_device_set_offline(CARD_RDEV(card));
1002         if (recover_flag == CARD_STATE_RECOVER)
1003                 card->state = CARD_STATE_RECOVER;
1004         else
1005                 card->state = CARD_STATE_DOWN;
1006         return -ENODEV;
1007 }
1008
1009 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1010 {
1011         return __qeth_l2_set_online(gdev, 0);
1012 }
1013
1014 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1015                                         int recovery_mode)
1016 {
1017         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1018         int rc = 0, rc2 = 0, rc3 = 0;
1019         enum qeth_card_states recover_flag;
1020
1021         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1022         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1023
1024         if (card->dev && netif_carrier_ok(card->dev))
1025                 netif_carrier_off(card->dev);
1026         recover_flag = card->state;
1027         qeth_l2_stop_card(card, recovery_mode);
1028         rc  = ccw_device_set_offline(CARD_DDEV(card));
1029         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1030         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1031         if (!rc)
1032                 rc = (rc2) ? rc2 : rc3;
1033         if (rc)
1034                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1035         if (recover_flag == CARD_STATE_UP)
1036                 card->state = CARD_STATE_RECOVER;
1037         /* let user_space know that device is offline */
1038         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1039         return 0;
1040 }
1041
1042 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1043 {
1044         return __qeth_l2_set_offline(cgdev, 0);
1045 }
1046
1047 static int qeth_l2_recover(void *ptr)
1048 {
1049         struct qeth_card *card;
1050         int rc = 0;
1051
1052         card = (struct qeth_card *) ptr;
1053         QETH_DBF_TEXT(TRACE, 2, "recover1");
1054         QETH_DBF_HEX(TRACE, 2, &card, sizeof(void *));
1055         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1056                 return 0;
1057         QETH_DBF_TEXT(TRACE, 2, "recover2");
1058         dev_warn(&card->gdev->dev,
1059                 "A recovery process has been started for the device\n");
1060         card->use_hard_stop = 1;
1061         __qeth_l2_set_offline(card->gdev, 1);
1062         rc = __qeth_l2_set_online(card->gdev, 1);
1063         /* don't run another scheduled recovery */
1064         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1065         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1066         if (!rc)
1067                 dev_info(&card->gdev->dev,
1068                         "Device successfully recovered!\n");
1069         else {
1070                 if (card->dev) {
1071                         rtnl_lock();
1072                         dev_close(card->dev);
1073                         rtnl_unlock();
1074                 }
1075                 dev_warn(&card->gdev->dev, "The qeth device driver "
1076                         "failed to recover an error on the device\n");
1077         }
1078         return 0;
1079 }
1080
1081 static int __init qeth_l2_init(void)
1082 {
1083         pr_info("register layer 2 discipline\n");
1084         return 0;
1085 }
1086
1087 static void __exit qeth_l2_exit(void)
1088 {
1089         pr_info("unregister layer 2 discipline\n");
1090 }
1091
1092 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1093 {
1094         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1095         qeth_qdio_clear_card(card, 0);
1096         qeth_clear_qdio_buffers(card);
1097 }
1098
1099 struct ccwgroup_driver qeth_l2_ccwgroup_driver = {
1100         .probe = qeth_l2_probe_device,
1101         .remove = qeth_l2_remove_device,
1102         .set_online = qeth_l2_set_online,
1103         .set_offline = qeth_l2_set_offline,
1104         .shutdown = qeth_l2_shutdown,
1105 };
1106 EXPORT_SYMBOL_GPL(qeth_l2_ccwgroup_driver);
1107
1108 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1109                            struct qeth_cmd_buffer *iob)
1110 {
1111         unsigned long flags;
1112         int rc = 0;
1113
1114         QETH_DBF_TEXT(TRACE, 5, "osndctrd");
1115
1116         wait_event(card->wait_q,
1117                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1118         qeth_prepare_control_data(card, len, iob);
1119         QETH_DBF_TEXT(TRACE, 6, "osnoirqp");
1120         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1121         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1122                               (addr_t) iob, 0, 0);
1123         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1124         if (rc) {
1125                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1126                            "ccw_device_start rc = %i\n", rc);
1127                 QETH_DBF_TEXT_(TRACE, 2, " err%d", rc);
1128                 qeth_release_buffer(iob->channel, iob);
1129                 atomic_set(&card->write.irq_pending, 0);
1130                 wake_up(&card->wait_q);
1131         }
1132         return rc;
1133 }
1134
1135 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1136                         struct qeth_cmd_buffer *iob, int data_len)
1137 {
1138         u16 s1, s2;
1139
1140         QETH_DBF_TEXT(TRACE, 4, "osndipa");
1141
1142         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1143         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1144         s2 = (u16)data_len;
1145         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1146         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1147         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1148         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1149         return qeth_osn_send_control_data(card, s1, iob);
1150 }
1151
1152 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1153 {
1154         struct qeth_cmd_buffer *iob;
1155         struct qeth_card *card;
1156         int rc;
1157
1158         QETH_DBF_TEXT(TRACE, 2, "osnsdmc");
1159         if (!dev)
1160                 return -ENODEV;
1161         card = dev->ml_priv;
1162         if (!card)
1163                 return -ENODEV;
1164         if ((card->state != CARD_STATE_UP) &&
1165             (card->state != CARD_STATE_SOFTSETUP))
1166                 return -ENODEV;
1167         iob = qeth_wait_for_buffer(&card->write);
1168         memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1169         rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1170         return rc;
1171 }
1172 EXPORT_SYMBOL(qeth_osn_assist);
1173
1174 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1175                   int (*assist_cb)(struct net_device *, void *),
1176                   int (*data_cb)(struct sk_buff *))
1177 {
1178         struct qeth_card *card;
1179
1180         QETH_DBF_TEXT(TRACE, 2, "osnreg");
1181         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1182         if (*dev == NULL)
1183                 return -ENODEV;
1184         card = (*dev)->ml_priv;
1185         if (!card)
1186                 return -ENODEV;
1187         if ((assist_cb == NULL) || (data_cb == NULL))
1188                 return -EINVAL;
1189         card->osn_info.assist_cb = assist_cb;
1190         card->osn_info.data_cb = data_cb;
1191         return 0;
1192 }
1193 EXPORT_SYMBOL(qeth_osn_register);
1194
1195 void qeth_osn_deregister(struct net_device *dev)
1196 {
1197         struct qeth_card *card;
1198
1199         QETH_DBF_TEXT(TRACE, 2, "osndereg");
1200         if (!dev)
1201                 return;
1202         card = dev->ml_priv;
1203         if (!card)
1204                 return;
1205         card->osn_info.assist_cb = NULL;
1206         card->osn_info.data_cb = NULL;
1207         return;
1208 }
1209 EXPORT_SYMBOL(qeth_osn_deregister);
1210
1211 module_init(qeth_l2_init);
1212 module_exit(qeth_l2_exit);
1213 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1214 MODULE_DESCRIPTION("qeth layer 2 discipline");
1215 MODULE_LICENSE("GPL");