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