git.oblomov.eu Git - linux-2.6/blob - drivers/s390/net/qeth_l2_main.c

   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 #include <linux/module.h>
  12 #include <linux/moduleparam.h>
  13 #include <linux/string.h>
  14 #include <linux/errno.h>
  15 #include <linux/kernel.h>
  16 #include <linux/etherdevice.h>
  17 #include <linux/mii.h>
  18 #include <linux/ip.h>
  19
  20 #include <asm/s390_rdev.h>
  21
  22 #include "qeth_core.h"
  23 #include "qeth_core_offl.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 %02x:%02x:%02x:%02x:%02x:%02x "
 135                           "already existing on %s \n",
 136                           mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
 137                           QETH_CARD_IFNAME(card));
 138                 cmd->hdr.return_code = 0;
 139         }
 140         if (cmd->hdr.return_code)
 141                 QETH_DBF_MESSAGE(2, "Could not set group MAC "
 142                           "%02x:%02x:%02x:%02x:%02x:%02x on %s: %x\n",
 143                           mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
 144                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 145         return 0;
 146 }
 147
 148 static int qeth_l2_send_setgroupmac(struct qeth_card *card, __u8 *mac)
 149 {
 150         QETH_DBF_TEXT(TRACE, 2, "L2Sgmac");
 151         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETGMAC,
 152                                           qeth_l2_send_setgroupmac_cb);
 153 }
 154
 155 static int qeth_l2_send_delgroupmac_cb(struct qeth_card *card,
 156                                 struct qeth_reply *reply,
 157                                 unsigned long data)
 158 {
 159         struct qeth_ipa_cmd *cmd;
 160         __u8 *mac;
 161
 162         QETH_DBF_TEXT(TRACE, 2, "L2Dgmacb");
 163         cmd = (struct qeth_ipa_cmd *) data;
 164         mac = &cmd->data.setdelmac.mac[0];
 165         if (cmd->hdr.return_code)
 166                 QETH_DBF_MESSAGE(2, "Could not delete group MAC "
 167                           "%02x:%02x:%02x:%02x:%02x:%02x on %s: %x\n",
 168                           mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
 169                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 170         return 0;
 171 }
 172
 173 static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac)
 174 {
 175         QETH_DBF_TEXT(TRACE, 2, "L2Dgmac");
 176         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELGMAC,
 177                                           qeth_l2_send_delgroupmac_cb);
 178 }
 179
 180 static void qeth_l2_add_mc(struct qeth_card *card, __u8 *mac, int vmac)
 181 {
 182         struct qeth_mc_mac *mc;
 183         int rc;
 184
 185         mc = kmalloc(sizeof(struct qeth_mc_mac), GFP_ATOMIC);
 186
 187         if (!mc)
 188                 return;
 189
 190         memcpy(mc->mc_addr, mac, OSA_ADDR_LEN);
 191         mc->mc_addrlen = OSA_ADDR_LEN;
 192         mc->is_vmac = vmac;
 193
 194         if (vmac) {
 195                 rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
 196                                         NULL);
 197         } else {
 198                 rc = qeth_l2_send_setgroupmac(card, mac);
 199         }
 200
 201         if (!rc)
 202                 list_add_tail(&mc->list, &card->mc_list);
 203         else
 204                 kfree(mc);
 205 }
 206
 207 static void qeth_l2_del_all_mc(struct qeth_card *card)
 208 {
 209         struct qeth_mc_mac *mc, *tmp;
 210
 211         spin_lock_bh(&card->mclock);
 212         list_for_each_entry_safe(mc, tmp, &card->mc_list, list) {
 213                 if (mc->is_vmac)
 214                         qeth_l2_send_setdelmac(card, mc->mc_addr,
 215                                         IPA_CMD_DELVMAC, NULL);
 216                 else
 217                         qeth_l2_send_delgroupmac(card, mc->mc_addr);
 218                 list_del(&mc->list);
 219                 kfree(mc);
 220         }
 221         spin_unlock_bh(&card->mclock);
 222 }
 223
 224 static void qeth_l2_get_packet_type(struct qeth_card *card,
 225                         struct qeth_hdr *hdr, struct sk_buff *skb)
 226 {
 227         __u16 hdr_mac;
 228
 229         if (!memcmp(skb->data + QETH_HEADER_SIZE,
 230                     skb->dev->broadcast, 6)) {
 231                 /* broadcast? */
 232                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 233                 return;
 234         }
 235         hdr_mac = *((__u16 *)skb->data);
 236         /* tr multicast? */
 237         switch (card->info.link_type) {
 238         case QETH_LINK_TYPE_HSTR:
 239         case QETH_LINK_TYPE_LANE_TR:
 240                 if ((hdr_mac == QETH_TR_MAC_NC) ||
 241                     (hdr_mac == QETH_TR_MAC_C))
 242                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 243                 else
 244                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 245                 break;
 246                 /* eth or so multicast? */
 247         default:
 248                 if ((hdr_mac == QETH_ETH_MAC_V4) ||
 249                      (hdr_mac == QETH_ETH_MAC_V6))
 250                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 251                 else
 252                         hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 253         }
 254 }
 255
 256 static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
 257                         struct sk_buff *skb, int ipv, int cast_type)
 258 {
 259         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
 260
 261         memset(hdr, 0, sizeof(struct qeth_hdr));
 262         hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
 263
 264         /* set byte byte 3 to casting flags */
 265         if (cast_type == RTN_MULTICAST)
 266                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 267         else if (cast_type == RTN_BROADCAST)
 268                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 269         else
 270                 qeth_l2_get_packet_type(card, hdr, skb);
 271
 272         hdr->hdr.l2.pkt_length = skb->len-QETH_HEADER_SIZE;
 273         /* VSWITCH relies on the VLAN
 274          * information to be present in
 275          * the QDIO header */
 276         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
 277                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
 278                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
 279         }
 280 }
 281
 282 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
 283                         struct qeth_reply *reply, unsigned long data)
 284 {
 285         struct qeth_ipa_cmd *cmd;
 286
 287         QETH_DBF_TEXT(TRACE, 2, "L2sdvcb");
 288         cmd = (struct qeth_ipa_cmd *) data;
 289         if (cmd->hdr.return_code) {
 290                 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x. "
 291                           "Continuing\n", cmd->data.setdelvlan.vlan_id,
 292                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 293                 QETH_DBF_TEXT_(TRACE, 2, "L2VL%4x", cmd->hdr.command);
 294                 QETH_DBF_TEXT_(TRACE, 2, "L2%s", CARD_BUS_ID(card));
 295                 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
 296         }
 297         return 0;
 298 }
 299
 300 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
 301                                 enum qeth_ipa_cmds ipacmd)
 302 {
 303         struct qeth_ipa_cmd *cmd;
 304         struct qeth_cmd_buffer *iob;
 305
 306         QETH_DBF_TEXT_(TRACE, 4, "L2sdv%x", ipacmd);
 307         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 308         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 309         cmd->data.setdelvlan.vlan_id = i;
 310         return qeth_send_ipa_cmd(card, iob,
 311                                  qeth_l2_send_setdelvlan_cb, NULL);
 312 }
 313
 314 static void qeth_l2_process_vlans(struct qeth_card *card, int clear)
 315 {
 316         struct qeth_vlan_vid *id;
 317         QETH_DBF_TEXT(TRACE, 3, "L2prcvln");
 318         spin_lock_bh(&card->vlanlock);
 319         list_for_each_entry(id, &card->vid_list, list) {
 320                 if (clear)
 321                         qeth_l2_send_setdelvlan(card, id->vid,
 322                                 IPA_CMD_DELVLAN);
 323                 else
 324                         qeth_l2_send_setdelvlan(card, id->vid,
 325                                 IPA_CMD_SETVLAN);
 326         }
 327         spin_unlock_bh(&card->vlanlock);
 328 }
 329
 330 static void qeth_l2_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)
 331 {
 332         struct qeth_card *card = dev->ml_priv;
 333         struct qeth_vlan_vid *id;
 334
 335         QETH_DBF_TEXT_(TRACE, 4, "aid:%d", vid);
 336         id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
 337         if (id) {
 338                 id->vid = vid;
 339                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
 340                 spin_lock_bh(&card->vlanlock);
 341                 list_add_tail(&id->list, &card->vid_list);
 342                 spin_unlock_bh(&card->vlanlock);
 343         }
 344 }
 345
 346 static void qeth_l2_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid)
 347 {
 348         struct qeth_vlan_vid *id, *tmpid = NULL;
 349         struct qeth_card *card = dev->ml_priv;
 350
 351         QETH_DBF_TEXT_(TRACE, 4, "kid:%d", vid);
 352         spin_lock_bh(&card->vlanlock);
 353         list_for_each_entry(id, &card->vid_list, list) {
 354                 if (id->vid == vid) {
 355                         list_del(&id->list);
 356                         tmpid = id;
 357                         break;
 358                 }
 359         }
 360         spin_unlock_bh(&card->vlanlock);
 361         if (tmpid) {
 362                 qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 363                 kfree(tmpid);
 364         }
 365         qeth_l2_set_multicast_list(card->dev);
 366 }
 367
 368 static int qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
 369 {
 370         int rc = 0;
 371
 372         QETH_DBF_TEXT(SETUP , 2, "stopcard");
 373         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 374
 375         qeth_set_allowed_threads(card, 0, 1);
 376         if (qeth_wait_for_threads(card, ~QETH_RECOVER_THREAD))
 377                 return -ERESTARTSYS;
 378         if (card->read.state == CH_STATE_UP &&
 379             card->write.state == CH_STATE_UP &&
 380             (card->state == CARD_STATE_UP)) {
 381                 if (recovery_mode &&
 382                     card->info.type != QETH_CARD_TYPE_OSN) {
 383                         qeth_l2_stop(card->dev);
 384                 } else {
 385                         rtnl_lock();
 386                         dev_close(card->dev);
 387                         rtnl_unlock();
 388                 }
 389                 if (!card->use_hard_stop) {
 390                         __u8 *mac = &card->dev->dev_addr[0];
 391                         rc = qeth_l2_send_delmac(card, mac);
 392                         QETH_DBF_TEXT_(SETUP, 2, "Lerr%d", rc);
 393                 }
 394                 card->state = CARD_STATE_SOFTSETUP;
 395         }
 396         if (card->state == CARD_STATE_SOFTSETUP) {
 397                 qeth_l2_process_vlans(card, 1);
 398                 if (!card->use_hard_stop)
 399                         qeth_l2_del_all_mc(card);
 400                 qeth_clear_ipacmd_list(card);
 401                 card->state = CARD_STATE_HARDSETUP;
 402         }
 403         if (card->state == CARD_STATE_HARDSETUP) {
 404                 qeth_qdio_clear_card(card, 0);
 405                 qeth_clear_qdio_buffers(card);
 406                 qeth_clear_working_pool_list(card);
 407                 card->state = CARD_STATE_DOWN;
 408         }
 409         if (card->state == CARD_STATE_DOWN) {
 410                 qeth_clear_cmd_buffers(&card->read);
 411                 qeth_clear_cmd_buffers(&card->write);
 412         }
 413         card->use_hard_stop = 0;
 414         return rc;
 415 }
 416
 417 static void qeth_l2_process_inbound_buffer(struct qeth_card *card,
 418                             struct qeth_qdio_buffer *buf, int index)
 419 {
 420         struct qdio_buffer_element *element;
 421         struct sk_buff *skb;
 422         struct qeth_hdr *hdr;
 423         int offset;
 424         unsigned int len;
 425
 426         /* get first element of current buffer */
 427         element = (struct qdio_buffer_element *)&buf->buffer->element[0];
 428         offset = 0;
 429         if (card->options.performance_stats)
 430                 card->perf_stats.bufs_rec++;
 431         while ((skb = qeth_core_get_next_skb(card, buf->buffer, &element,
 432                                        &offset, &hdr))) {
 433                 skb->dev = card->dev;
 434                 /* is device UP ? */
 435                 if (!(card->dev->flags & IFF_UP)) {
 436                         dev_kfree_skb_any(skb);
 437                         continue;
 438                 }
 439
 440                 switch (hdr->hdr.l2.id) {
 441                 case QETH_HEADER_TYPE_LAYER2:
 442                         skb->pkt_type = PACKET_HOST;
 443                         skb->protocol = eth_type_trans(skb, skb->dev);
 444                         if (card->options.checksum_type == NO_CHECKSUMMING)
 445                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 446                         else
 447                                 skb->ip_summed = CHECKSUM_NONE;
 448                         if (skb->protocol == htons(ETH_P_802_2))
 449                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
 450                         len = skb->len;
 451                         netif_rx(skb);
 452                         break;
 453                 case QETH_HEADER_TYPE_OSN:
 454                         skb_push(skb, sizeof(struct qeth_hdr));
 455                         skb_copy_to_linear_data(skb, hdr,
 456                                                 sizeof(struct qeth_hdr));
 457                         len = skb->len;
 458                         card->osn_info.data_cb(skb);
 459                         break;
 460                 default:
 461                         dev_kfree_skb_any(skb);
 462                         QETH_DBF_TEXT(TRACE, 3, "inbunkno");
 463                         QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
 464                         continue;
 465                 }
 466                 card->dev->last_rx = jiffies;
 467                 card->stats.rx_packets++;
 468                 card->stats.rx_bytes += len;
 469         }
 470 }
 471
 472 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
 473                            enum qeth_ipa_cmds ipacmd,
 474                            int (*reply_cb) (struct qeth_card *,
 475                                             struct qeth_reply*,
 476                                             unsigned long))
 477 {
 478         struct qeth_ipa_cmd *cmd;
 479         struct qeth_cmd_buffer *iob;
 480
 481         QETH_DBF_TEXT(TRACE, 2, "L2sdmac");
 482         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 483         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 484         cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
 485         memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
 486         return qeth_send_ipa_cmd(card, iob, reply_cb, NULL);
 487 }
 488
 489 static int qeth_l2_send_setmac_cb(struct qeth_card *card,
 490                            struct qeth_reply *reply,
 491                            unsigned long data)
 492 {
 493         struct qeth_ipa_cmd *cmd;
 494
 495         QETH_DBF_TEXT(TRACE, 2, "L2Smaccb");
 496         cmd = (struct qeth_ipa_cmd *) data;
 497         if (cmd->hdr.return_code) {
 498                 QETH_DBF_TEXT_(TRACE, 2, "L2er%x", cmd->hdr.return_code);
 499                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 500                 cmd->hdr.return_code = -EIO;
 501         } else {
 502                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 503                 memcpy(card->dev->dev_addr, cmd->data.setdelmac.mac,
 504                        OSA_ADDR_LEN);
 505                 PRINT_INFO("MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x "
 506                            "successfully registered on device %s\n",
 507                            card->dev->dev_addr[0], card->dev->dev_addr[1],
 508                            card->dev->dev_addr[2], card->dev->dev_addr[3],
 509                            card->dev->dev_addr[4], card->dev->dev_addr[5],
 510                            card->dev->name);
 511         }
 512         return 0;
 513 }
 514
 515 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
 516 {
 517         QETH_DBF_TEXT(TRACE, 2, "L2Setmac");
 518         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC,
 519                                           qeth_l2_send_setmac_cb);
 520 }
 521
 522 static int qeth_l2_send_delmac_cb(struct qeth_card *card,
 523                            struct qeth_reply *reply,
 524                            unsigned long data)
 525 {
 526         struct qeth_ipa_cmd *cmd;
 527
 528         QETH_DBF_TEXT(TRACE, 2, "L2Dmaccb");
 529         cmd = (struct qeth_ipa_cmd *) data;
 530         if (cmd->hdr.return_code) {
 531                 QETH_DBF_TEXT_(TRACE, 2, "err%d", cmd->hdr.return_code);
 532                 cmd->hdr.return_code = -EIO;
 533                 return 0;
 534         }
 535         card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 536
 537         return 0;
 538 }
 539
 540 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
 541 {
 542         QETH_DBF_TEXT(TRACE, 2, "L2Delmac");
 543         if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
 544                 return 0;
 545         return qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC,
 546                                           qeth_l2_send_delmac_cb);
 547 }
 548
 549 static int qeth_l2_request_initial_mac(struct qeth_card *card)
 550 {
 551         int rc = 0;
 552         char vendor_pre[] = {0x02, 0x00, 0x00};
 553
 554         QETH_DBF_TEXT(SETUP, 2, "doL2init");
 555         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
 556
 557         rc = qeth_query_setadapterparms(card);
 558         if (rc) {
 559                 QETH_DBF_MESSAGE(2, "could not query adapter parameters on "
 560                         "device %s: x%x\n", CARD_BUS_ID(card), rc);
 561         }
 562
 563         if ((card->info.type == QETH_CARD_TYPE_IQD) ||
 564             (card->info.guestlan)) {
 565                 rc = qeth_setadpparms_change_macaddr(card);
 566                 if (rc) {
 567                         QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
 568                                 "device %s: x%x\n", CARD_BUS_ID(card), rc);
 569                         QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 570                         return rc;
 571                 }
 572                 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN);
 573         } else {
 574                 random_ether_addr(card->dev->dev_addr);
 575                 memcpy(card->dev->dev_addr, vendor_pre, 3);
 576         }
 577         return 0;
 578 }
 579
 580 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 581 {
 582         struct sockaddr *addr = p;
 583         struct qeth_card *card = dev->ml_priv;
 584         int rc = 0;
 585
 586         QETH_DBF_TEXT(TRACE, 3, "setmac");
 587
 588         if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
 589                 QETH_DBF_TEXT(TRACE, 3, "setmcINV");
 590                 return -EOPNOTSUPP;
 591         }
 592
 593         if (card->info.type == QETH_CARD_TYPE_OSN) {
 594                 QETH_DBF_TEXT(TRACE, 3, "setmcOSN");
 595                 return -EOPNOTSUPP;
 596         }
 597         QETH_DBF_TEXT_(TRACE, 3, "%s", CARD_BUS_ID(card));
 598         QETH_DBF_HEX(TRACE, 3, addr->sa_data, OSA_ADDR_LEN);
 599         rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
 600         if (!rc)
 601                 rc = qeth_l2_send_setmac(card, addr->sa_data);
 602         return rc;
 603 }
 604
 605 static void qeth_l2_set_multicast_list(struct net_device *dev)
 606 {
 607         struct qeth_card *card = dev->ml_priv;
 608         struct dev_addr_list *dm;
 609
 610         if (card->info.type == QETH_CARD_TYPE_OSN)
 611                 return ;
 612
 613         QETH_DBF_TEXT(TRACE, 3, "setmulti");
 614         qeth_l2_del_all_mc(card);
 615         spin_lock_bh(&card->mclock);
 616         for (dm = dev->mc_list; dm; dm = dm->next)
 617                 qeth_l2_add_mc(card, dm->da_addr, 0);
 618
 619         for (dm = dev->uc_list; dm; dm = dm->next)
 620                 qeth_l2_add_mc(card, dm->da_addr, 1);
 621
 622         spin_unlock_bh(&card->mclock);
 623         if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
 624                 return;
 625         qeth_setadp_promisc_mode(card);
 626 }
 627
 628 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 629 {
 630         int rc;
 631         struct qeth_hdr *hdr = NULL;
 632         int elements = 0;
 633         struct qeth_card *card = dev->ml_priv;
 634         struct sk_buff *new_skb = skb;
 635         int ipv = qeth_get_ip_version(skb);
 636         int cast_type = qeth_get_cast_type(card, skb);
 637         struct qeth_qdio_out_q *queue = card->qdio.out_qs
 638                 [qeth_get_priority_queue(card, skb, ipv, cast_type)];
 639         int tx_bytes = skb->len;
 640         enum qeth_large_send_types large_send = QETH_LARGE_SEND_NO;
 641         struct qeth_eddp_context *ctx = NULL;
 642         int data_offset = -1;
 643         int elements_needed = 0;
 644         int hd_len = 0;
 645
 646         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
 647                 card->stats.tx_carrier_errors++;
 648                 goto tx_drop;
 649         }
 650
 651         if ((card->info.type == QETH_CARD_TYPE_OSN) &&
 652             (skb->protocol == htons(ETH_P_IPV6)))
 653                 goto tx_drop;
 654
 655         if (card->options.performance_stats) {
 656                 card->perf_stats.outbound_cnt++;
 657                 card->perf_stats.outbound_start_time = qeth_get_micros();
 658         }
 659         netif_stop_queue(dev);
 660
 661         if (skb_is_gso(skb))
 662                 large_send = QETH_LARGE_SEND_EDDP;
 663
 664         if (card->info.type == QETH_CARD_TYPE_OSN)
 665                 hdr = (struct qeth_hdr *)skb->data;
 666         else {
 667                 if ((card->info.type == QETH_CARD_TYPE_IQD) && (!large_send) &&
 668                     (skb_shinfo(skb)->nr_frags == 0)) {
 669                         new_skb = skb;
 670                         data_offset = ETH_HLEN;
 671                         hd_len = ETH_HLEN;
 672                         hdr = kmem_cache_alloc(qeth_core_header_cache,
 673                                                 GFP_ATOMIC);
 674                         if (!hdr)
 675                                 goto tx_drop;
 676                         elements_needed++;
 677                         skb_reset_mac_header(new_skb);
 678                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 679                         hdr->hdr.l2.pkt_length = new_skb->len;
 680                         memcpy(((char *)hdr) + sizeof(struct qeth_hdr),
 681                                 skb_mac_header(new_skb), ETH_HLEN);
 682                 } else {
 683                         /* create a clone with writeable headroom */
 684                         new_skb = skb_realloc_headroom(skb,
 685                                                 sizeof(struct qeth_hdr));
 686                         if (!new_skb)
 687                                 goto tx_drop;
 688                         hdr = (struct qeth_hdr *)skb_push(new_skb,
 689                                                 sizeof(struct qeth_hdr));
 690                         skb_set_mac_header(new_skb, sizeof(struct qeth_hdr));
 691                         qeth_l2_fill_header(card, hdr, new_skb, ipv, cast_type);
 692                 }
 693         }
 694
 695         if (large_send == QETH_LARGE_SEND_EDDP) {
 696                 ctx = qeth_eddp_create_context(card, new_skb, hdr,
 697                                                 skb->sk->sk_protocol);
 698                 if (ctx == NULL) {
 699                         QETH_DBF_MESSAGE(2, "could not create eddp context\n");
 700                         goto tx_drop;
 701                 }
 702         } else {
 703                 elements = qeth_get_elements_no(card, (void *)hdr, new_skb,
 704                                                 elements_needed);
 705                 if (!elements) {
 706                         if (data_offset >= 0)
 707                                 kmem_cache_free(qeth_core_header_cache, hdr);
 708                         goto tx_drop;
 709                 }
 710         }
 711
 712         if ((large_send == QETH_LARGE_SEND_NO) &&
 713             (skb->ip_summed == CHECKSUM_PARTIAL))
 714                 qeth_tx_csum(new_skb);
 715
 716         if (card->info.type != QETH_CARD_TYPE_IQD)
 717                 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
 718                                          elements, ctx);
 719         else
 720                 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
 721                                         elements, ctx, data_offset, hd_len);
 722         if (!rc) {
 723                 card->stats.tx_packets++;
 724                 card->stats.tx_bytes += tx_bytes;
 725                 if (new_skb != skb)
 726                         dev_kfree_skb_any(skb);
 727                 if (card->options.performance_stats) {
 728                         if (large_send != QETH_LARGE_SEND_NO) {
 729                                 card->perf_stats.large_send_bytes += tx_bytes;
 730                                 card->perf_stats.large_send_cnt++;
 731                         }
 732                         if (skb_shinfo(new_skb)->nr_frags > 0) {
 733                                 card->perf_stats.sg_skbs_sent++;
 734                                 /* nr_frags + skb->data */
 735                                 card->perf_stats.sg_frags_sent +=
 736                                         skb_shinfo(new_skb)->nr_frags + 1;
 737                         }
 738                 }
 739
 740                 if (ctx != NULL) {
 741                         qeth_eddp_put_context(ctx);
 742                         dev_kfree_skb_any(new_skb);
 743                 }
 744         } else {
 745                 if (ctx != NULL)
 746                         qeth_eddp_put_context(ctx);
 747
 748                 if (data_offset >= 0)
 749                         kmem_cache_free(qeth_core_header_cache, hdr);
 750
 751                 if (rc == -EBUSY) {
 752                         if (new_skb != skb)
 753                                 dev_kfree_skb_any(new_skb);
 754                         return NETDEV_TX_BUSY;
 755                 } else
 756                         goto tx_drop;
 757         }
 758
 759         netif_wake_queue(dev);
 760         if (card->options.performance_stats)
 761                 card->perf_stats.outbound_time += qeth_get_micros() -
 762                         card->perf_stats.outbound_start_time;
 763         return rc;
 764
 765 tx_drop:
 766         card->stats.tx_dropped++;
 767         card->stats.tx_errors++;
 768         if ((new_skb != skb) && new_skb)
 769                 dev_kfree_skb_any(new_skb);
 770         dev_kfree_skb_any(skb);
 771         netif_wake_queue(dev);
 772         return NETDEV_TX_OK;
 773 }
 774
 775 static void qeth_l2_qdio_input_handler(struct ccw_device *ccwdev,
 776                         unsigned int qdio_err, unsigned int queue,
 777                         int first_element, int count, unsigned long card_ptr)
 778 {
 779         struct net_device *net_dev;
 780         struct qeth_card *card;
 781         struct qeth_qdio_buffer *buffer;
 782         int index;
 783         int i;
 784
 785         card = (struct qeth_card *) card_ptr;
 786         net_dev = card->dev;
 787         if (card->options.performance_stats) {
 788                 card->perf_stats.inbound_cnt++;
 789                 card->perf_stats.inbound_start_time = qeth_get_micros();
 790         }
 791         if (qdio_err & QDIO_ERROR_ACTIVATE_CHECK_CONDITION) {
 792                 QETH_DBF_TEXT(TRACE, 1, "qdinchk");
 793                 QETH_DBF_TEXT_(TRACE, 1, "%s", CARD_BUS_ID(card));
 794                 QETH_DBF_TEXT_(TRACE, 1, "%04X%04X", first_element,
 795                                 count);
 796                 QETH_DBF_TEXT_(TRACE, 1, "%04X", queue);
 797                 qeth_schedule_recovery(card);
 798                 return;
 799         }
 800         for (i = first_element; i < (first_element + count); ++i) {
 801                 index = i % QDIO_MAX_BUFFERS_PER_Q;
 802                 buffer = &card->qdio.in_q->bufs[index];
 803                 if (!(qdio_err &&
 804                       qeth_check_qdio_errors(buffer->buffer, qdio_err, "qinerr")))
 805                         qeth_l2_process_inbound_buffer(card, buffer, index);
 806                 /* clear buffer and give back to hardware */
 807                 qeth_put_buffer_pool_entry(card, buffer->pool_entry);
 808                 qeth_queue_input_buffer(card, index);
 809         }
 810         if (card->options.performance_stats)
 811                 card->perf_stats.inbound_time += qeth_get_micros() -
 812                         card->perf_stats.inbound_start_time;
 813 }
 814
 815 static int qeth_l2_open(struct net_device *dev)
 816 {
 817         struct qeth_card *card = dev->ml_priv;
 818
 819         QETH_DBF_TEXT(TRACE, 4, "qethopen");
 820         if (card->state != CARD_STATE_SOFTSETUP)
 821                 return -ENODEV;
 822
 823         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
 824              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
 825                 QETH_DBF_TEXT(TRACE, 4, "nomacadr");
 826                 return -EPERM;
 827         }
 828         card->data.state = CH_STATE_UP;
 829         card->state = CARD_STATE_UP;
 830         netif_start_queue(dev);
 831
 832         if (!card->lan_online && netif_carrier_ok(dev))
 833                 netif_carrier_off(dev);
 834         return 0;
 835 }
 836
 837
 838 static int qeth_l2_stop(struct net_device *dev)
 839 {
 840         struct qeth_card *card = dev->ml_priv;
 841
 842         QETH_DBF_TEXT(TRACE, 4, "qethstop");
 843         netif_tx_disable(dev);
 844         if (card->state == CARD_STATE_UP)
 845                 card->state = CARD_STATE_SOFTSETUP;
 846         return 0;
 847 }
 848
 849 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 850 {
 851         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 852
 853         INIT_LIST_HEAD(&card->vid_list);
 854         INIT_LIST_HEAD(&card->mc_list);
 855         card->options.layer2 = 1;
 856         card->discipline.input_handler = (qdio_handler_t *)
 857                 qeth_l2_qdio_input_handler;
 858         card->discipline.output_handler = (qdio_handler_t *)
 859                 qeth_qdio_output_handler;
 860         card->discipline.recover = qeth_l2_recover;
 861         return 0;
 862 }
 863
 864 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
 865 {
 866         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
 867
 868         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 869
 870         if (cgdev->state == CCWGROUP_ONLINE) {
 871                 card->use_hard_stop = 1;
 872                 qeth_l2_set_offline(cgdev);
 873         }
 874
 875         if (card->dev) {
 876                 unregister_netdev(card->dev);
 877                 card->dev = NULL;
 878         }
 879
 880         qeth_l2_del_all_mc(card);
 881         return;
 882 }
 883
 884 static int qeth_l2_ethtool_set_tso(struct net_device *dev, u32 data)
 885 {
 886         struct qeth_card *card = dev->ml_priv;
 887
 888         if (data) {
 889                 if (card->options.large_send == QETH_LARGE_SEND_NO) {
 890                         card->options.large_send = QETH_LARGE_SEND_EDDP;
 891                         dev->features |= NETIF_F_TSO;
 892                 }
 893         } else {
 894                 dev->features &= ~NETIF_F_TSO;
 895                 card->options.large_send = QETH_LARGE_SEND_NO;
 896         }
 897         return 0;
 898 }
 899
 900 static struct ethtool_ops qeth_l2_ethtool_ops = {
 901         .get_link = ethtool_op_get_link,
 902         .get_tx_csum = ethtool_op_get_tx_csum,
 903         .set_tx_csum = ethtool_op_set_tx_hw_csum,
 904         .get_sg = ethtool_op_get_sg,
 905         .set_sg = ethtool_op_set_sg,
 906         .get_tso = ethtool_op_get_tso,
 907         .set_tso = qeth_l2_ethtool_set_tso,
 908         .get_strings = qeth_core_get_strings,
 909         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 910         .get_stats_count = qeth_core_get_stats_count,
 911         .get_drvinfo = qeth_core_get_drvinfo,
 912         .get_settings = qeth_core_ethtool_get_settings,
 913 };
 914
 915 static struct ethtool_ops qeth_l2_osn_ops = {
 916         .get_strings = qeth_core_get_strings,
 917         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 918         .get_stats_count = qeth_core_get_stats_count,
 919         .get_drvinfo = qeth_core_get_drvinfo,
 920 };
 921
 922 static int qeth_l2_setup_netdev(struct qeth_card *card)
 923 {
 924         switch (card->info.type) {
 925         case QETH_CARD_TYPE_OSAE:
 926                 card->dev = alloc_etherdev(0);
 927                 break;
 928         case QETH_CARD_TYPE_IQD:
 929                 card->dev = alloc_netdev(0, "hsi%d", ether_setup);
 930                 break;
 931         case QETH_CARD_TYPE_OSN:
 932                 card->dev = alloc_netdev(0, "osn%d", ether_setup);
 933                 card->dev->flags |= IFF_NOARP;
 934                 break;
 935         default:
 936                 card->dev = alloc_etherdev(0);
 937         }
 938
 939         if (!card->dev)
 940                 return -ENODEV;
 941
 942         card->dev->ml_priv = card;
 943         card->dev->tx_timeout = &qeth_tx_timeout;
 944         card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
 945         card->dev->open = qeth_l2_open;
 946         card->dev->stop = qeth_l2_stop;
 947         card->dev->hard_start_xmit = qeth_l2_hard_start_xmit;
 948         card->dev->do_ioctl = qeth_l2_do_ioctl;
 949         card->dev->get_stats = qeth_get_stats;
 950         card->dev->change_mtu = qeth_change_mtu;
 951         card->dev->set_multicast_list = qeth_l2_set_multicast_list;
 952         card->dev->vlan_rx_kill_vid = qeth_l2_vlan_rx_kill_vid;
 953         card->dev->vlan_rx_add_vid = qeth_l2_vlan_rx_add_vid;
 954         card->dev->set_mac_address = qeth_l2_set_mac_address;
 955         card->dev->mtu = card->info.initial_mtu;
 956         if (card->info.type != QETH_CARD_TYPE_OSN)
 957                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_ethtool_ops);
 958         else
 959                 SET_ETHTOOL_OPS(card->dev, &qeth_l2_osn_ops);
 960         card->dev->features |= NETIF_F_HW_VLAN_FILTER;
 961         card->info.broadcast_capable = 1;
 962         qeth_l2_request_initial_mac(card);
 963         SET_NETDEV_DEV(card->dev, &card->gdev->dev);
 964         return register_netdev(card->dev);
 965 }
 966
 967 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
 968 {
 969         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 970         int rc = 0;
 971         enum qeth_card_states recover_flag;
 972
 973         BUG_ON(!card);
 974         QETH_DBF_TEXT(SETUP, 2, "setonlin");
 975         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 976
 977         qeth_set_allowed_threads(card, QETH_RECOVER_THREAD, 1);
 978         if (qeth_wait_for_threads(card, ~QETH_RECOVER_THREAD)) {
 979                 PRINT_WARN("set_online of card %s interrupted by user!\n",
 980                            CARD_BUS_ID(card));
 981                 return -ERESTARTSYS;
 982         }
 983
 984         recover_flag = card->state;
 985         rc = ccw_device_set_online(CARD_RDEV(card));
 986         if (rc) {
 987                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 988                 return -EIO;
 989         }
 990         rc = ccw_device_set_online(CARD_WDEV(card));
 991         if (rc) {
 992                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 993                 return -EIO;
 994         }
 995         rc = ccw_device_set_online(CARD_DDEV(card));
 996         if (rc) {
 997                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 998                 return -EIO;
 999         }
1000
1001         rc = qeth_core_hardsetup_card(card);
1002         if (rc) {
1003                 QETH_DBF_TEXT_(SETUP, 2, "2err%d", rc);
1004                 goto out_remove;
1005         }
1006
1007         if (!card->dev && qeth_l2_setup_netdev(card))
1008                 goto out_remove;
1009
1010         if (card->info.type != QETH_CARD_TYPE_OSN)
1011                 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
1012
1013         card->state = CARD_STATE_HARDSETUP;
1014         qeth_print_status_message(card);
1015
1016         /* softsetup */
1017         QETH_DBF_TEXT(SETUP, 2, "softsetp");
1018
1019         rc = qeth_send_startlan(card);
1020         if (rc) {
1021                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1022                 if (rc == 0xe080) {
1023                         PRINT_WARN("LAN on card %s if offline! "
1024                                    "Waiting for STARTLAN from card.\n",
1025                                    CARD_BUS_ID(card));
1026                         card->lan_online = 0;
1027                 }
1028                 return rc;
1029         } else
1030                 card->lan_online = 1;
1031
1032         if (card->info.type != QETH_CARD_TYPE_OSN) {
1033                 qeth_set_large_send(card, card->options.large_send);
1034                 qeth_l2_process_vlans(card, 0);
1035         }
1036
1037         netif_tx_disable(card->dev);
1038
1039         rc = qeth_init_qdio_queues(card);
1040         if (rc) {
1041                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1042                 goto out_remove;
1043         }
1044         card->state = CARD_STATE_SOFTSETUP;
1045         netif_carrier_on(card->dev);
1046
1047         qeth_set_allowed_threads(card, 0xffffffff, 0);
1048         if (recover_flag == CARD_STATE_RECOVER) {
1049                 if (recovery_mode &&
1050                     card->info.type != QETH_CARD_TYPE_OSN) {
1051                         qeth_l2_open(card->dev);
1052                 } else {
1053                         rtnl_lock();
1054                         dev_open(card->dev);
1055                         rtnl_unlock();
1056                 }
1057                 /* this also sets saved unicast addresses */
1058                 qeth_l2_set_multicast_list(card->dev);
1059         }
1060         /* let user_space know that device is online */
1061         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1062         return 0;
1063 out_remove:
1064         card->use_hard_stop = 1;
1065         qeth_l2_stop_card(card, 0);
1066         ccw_device_set_offline(CARD_DDEV(card));
1067         ccw_device_set_offline(CARD_WDEV(card));
1068         ccw_device_set_offline(CARD_RDEV(card));
1069         if (recover_flag == CARD_STATE_RECOVER)
1070                 card->state = CARD_STATE_RECOVER;
1071         else
1072                 card->state = CARD_STATE_DOWN;
1073         return -ENODEV;
1074 }
1075
1076 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1077 {
1078         return __qeth_l2_set_online(gdev, 0);
1079 }
1080
1081 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1082                                         int recovery_mode)
1083 {
1084         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1085         int rc = 0, rc2 = 0, rc3 = 0;
1086         enum qeth_card_states recover_flag;
1087
1088         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1089         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1090
1091         if (card->dev && netif_carrier_ok(card->dev))
1092                 netif_carrier_off(card->dev);
1093         recover_flag = card->state;
1094         if (qeth_l2_stop_card(card, recovery_mode) == -ERESTARTSYS) {
1095                 PRINT_WARN("Stopping card %s interrupted by user!\n",
1096                            CARD_BUS_ID(card));
1097                 return -ERESTARTSYS;
1098         }
1099         rc  = ccw_device_set_offline(CARD_DDEV(card));
1100         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1101         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1102         if (!rc)
1103                 rc = (rc2) ? rc2 : rc3;
1104         if (rc)
1105                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1106         if (recover_flag == CARD_STATE_UP)
1107                 card->state = CARD_STATE_RECOVER;
1108         /* let user_space know that device is offline */
1109         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1110         return 0;
1111 }
1112
1113 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1114 {
1115         return __qeth_l2_set_offline(cgdev, 0);
1116 }
1117
1118 static int qeth_l2_recover(void *ptr)
1119 {
1120         struct qeth_card *card;
1121         int rc = 0;
1122
1123         card = (struct qeth_card *) ptr;
1124         QETH_DBF_TEXT(TRACE, 2, "recover1");
1125         QETH_DBF_HEX(TRACE, 2, &card, sizeof(void *));
1126         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1127                 return 0;
1128         QETH_DBF_TEXT(TRACE, 2, "recover2");
1129         PRINT_WARN("Recovery of device %s started ...\n",
1130                    CARD_BUS_ID(card));
1131         card->use_hard_stop = 1;
1132         __qeth_l2_set_offline(card->gdev, 1);
1133         rc = __qeth_l2_set_online(card->gdev, 1);
1134         /* don't run another scheduled recovery */
1135         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1136         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1137         if (!rc)
1138                 PRINT_INFO("Device %s successfully recovered!\n",
1139                            CARD_BUS_ID(card));
1140         else {
1141                 rtnl_lock();
1142                 dev_close(card->dev);
1143                 rtnl_unlock();
1144                 PRINT_INFO("Device %s could not be recovered!\n",
1145                            CARD_BUS_ID(card));
1146         }
1147         return 0;
1148 }
1149
1150 static int __init qeth_l2_init(void)
1151 {
1152         PRINT_INFO("register layer 2 discipline\n");
1153         return 0;
1154 }
1155
1156 static void __exit qeth_l2_exit(void)
1157 {
1158         PRINT_INFO("unregister layer 2 discipline\n");
1159 }
1160
1161 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1162 {
1163         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1164         qeth_qdio_clear_card(card, 0);
1165         qeth_clear_qdio_buffers(card);
1166 }
1167
1168 struct ccwgroup_driver qeth_l2_ccwgroup_driver = {
1169         .probe = qeth_l2_probe_device,
1170         .remove = qeth_l2_remove_device,
1171         .set_online = qeth_l2_set_online,
1172         .set_offline = qeth_l2_set_offline,
1173         .shutdown = qeth_l2_shutdown,
1174 };
1175 EXPORT_SYMBOL_GPL(qeth_l2_ccwgroup_driver);
1176
1177 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1178                            struct qeth_cmd_buffer *iob)
1179 {
1180         unsigned long flags;
1181         int rc = 0;
1182
1183         QETH_DBF_TEXT(TRACE, 5, "osndctrd");
1184
1185         wait_event(card->wait_q,
1186                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1187         qeth_prepare_control_data(card, len, iob);
1188         QETH_DBF_TEXT(TRACE, 6, "osnoirqp");
1189         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1190         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1191                               (addr_t) iob, 0, 0);
1192         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1193         if (rc) {
1194                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1195                            "ccw_device_start rc = %i\n", rc);
1196                 QETH_DBF_TEXT_(TRACE, 2, " err%d", rc);
1197                 qeth_release_buffer(iob->channel, iob);
1198                 atomic_set(&card->write.irq_pending, 0);
1199                 wake_up(&card->wait_q);
1200         }
1201         return rc;
1202 }
1203
1204 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1205                         struct qeth_cmd_buffer *iob, int data_len)
1206 {
1207         u16 s1, s2;
1208
1209         QETH_DBF_TEXT(TRACE, 4, "osndipa");
1210
1211         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1212         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1213         s2 = (u16)data_len;
1214         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1215         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1216         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1217         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1218         return qeth_osn_send_control_data(card, s1, iob);
1219 }
1220
1221 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1222 {
1223         struct qeth_cmd_buffer *iob;
1224         struct qeth_card *card;
1225         int rc;
1226
1227         QETH_DBF_TEXT(TRACE, 2, "osnsdmc");
1228         if (!dev)
1229                 return -ENODEV;
1230         card = dev->ml_priv;
1231         if (!card)
1232                 return -ENODEV;
1233         if ((card->state != CARD_STATE_UP) &&
1234             (card->state != CARD_STATE_SOFTSETUP))
1235                 return -ENODEV;
1236         iob = qeth_wait_for_buffer(&card->write);
1237         memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1238         rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1239         return rc;
1240 }
1241 EXPORT_SYMBOL(qeth_osn_assist);
1242
1243 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1244                   int (*assist_cb)(struct net_device *, void *),
1245                   int (*data_cb)(struct sk_buff *))
1246 {
1247         struct qeth_card *card;
1248
1249         QETH_DBF_TEXT(TRACE, 2, "osnreg");
1250         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1251         if (*dev == NULL)
1252                 return -ENODEV;
1253         card = (*dev)->ml_priv;
1254         if (!card)
1255                 return -ENODEV;
1256         if ((assist_cb == NULL) || (data_cb == NULL))
1257                 return -EINVAL;
1258         card->osn_info.assist_cb = assist_cb;
1259         card->osn_info.data_cb = data_cb;
1260         return 0;
1261 }
1262 EXPORT_SYMBOL(qeth_osn_register);
1263
1264 void qeth_osn_deregister(struct net_device *dev)
1265 {
1266         struct qeth_card *card;
1267
1268         QETH_DBF_TEXT(TRACE, 2, "osndereg");
1269         if (!dev)
1270                 return;
1271         card = dev->ml_priv;
1272         if (!card)
1273                 return;
1274         card->osn_info.assist_cb = NULL;
1275         card->osn_info.data_cb = NULL;
1276         return;
1277 }
1278 EXPORT_SYMBOL(qeth_osn_deregister);
1279
1280 module_init(qeth_l2_init);
1281 module_exit(qeth_l2_exit);
1282 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
1283 MODULE_DESCRIPTION("qeth layer 2 discipline");
1284 MODULE_LICENSE("GPL");