drivers/s390/net/qeth_l2_main.c

   1 /*
   2  *    Copyright IBM Corp. 2007, 2009
   3  *    Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
   4  *               Frank Pavlic <fpavlic@de.ibm.com>,
   5  *               Thomas Spatzier <tspat@de.ibm.com>,
   6  *               Frank Blaschka <frank.blaschka@de.ibm.com>
   7  */
   8
   9 #define KMSG_COMPONENT "qeth"
  10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  11
  12 #include <linux/module.h>
  13 #include <linux/moduleparam.h>
  14 #include <linux/string.h>
  15 #include <linux/errno.h>
  16 #include <linux/kernel.h>
  17 #include <linux/slab.h>
  18 #include <linux/etherdevice.h>
  19 #include <linux/mii.h>
  20 #include <linux/ip.h>
  21 #include <linux/list.h>
  22 #include <linux/hash.h>
  23 #include <linux/hashtable.h>
  24 #include <linux/string.h>
  25 #include "qeth_core.h"
  26 #include "qeth_l2.h"
  27
  28 static int qeth_l2_set_offline(struct ccwgroup_device *);
  29 static int qeth_l2_stop(struct net_device *);
  30 static int qeth_l2_send_delmac(struct qeth_card *, __u8 *);
  31 static int qeth_l2_send_setdelmac(struct qeth_card *, __u8 *,
  32                            enum qeth_ipa_cmds);
  33 static void qeth_l2_set_rx_mode(struct net_device *);
  34 static int qeth_l2_recover(void *);
  35 static void qeth_bridgeport_query_support(struct qeth_card *card);
  36 static void qeth_bridge_state_change(struct qeth_card *card,
  37                                         struct qeth_ipa_cmd *cmd);
  38 static void qeth_bridge_host_event(struct qeth_card *card,
  39                                         struct qeth_ipa_cmd *cmd);
  40
  41 static int qeth_l2_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
  42 {
  43         struct qeth_card *card = dev->ml_priv;
  44         struct mii_ioctl_data *mii_data;
  45         int rc = 0;
  46
  47         if (!card)
  48                 return -ENODEV;
  49
  50         if (!qeth_card_hw_is_reachable(card))
  51                 return -ENODEV;
  52
  53         if (card->info.type == QETH_CARD_TYPE_OSN)
  54                 return -EPERM;
  55
  56         switch (cmd) {
  57         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
  58                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
  59                 break;
  60         case SIOC_QETH_GET_CARD_TYPE:
  61                 if ((card->info.type == QETH_CARD_TYPE_OSD ||
  62                      card->info.type == QETH_CARD_TYPE_OSM ||
  63                      card->info.type == QETH_CARD_TYPE_OSX) &&
  64                     !card->info.guestlan)
  65                         return 1;
  66                 return 0;
  67                 break;
  68         case SIOCGMIIPHY:
  69                 mii_data = if_mii(rq);
  70                 mii_data->phy_id = 0;
  71                 break;
  72         case SIOCGMIIREG:
  73                 mii_data = if_mii(rq);
  74                 if (mii_data->phy_id != 0)
  75                         rc = -EINVAL;
  76                 else
  77                         mii_data->val_out = qeth_mdio_read(dev,
  78                                 mii_data->phy_id, mii_data->reg_num);
  79                 break;
  80         case SIOC_QETH_QUERY_OAT:
  81                 rc = qeth_query_oat_command(card, rq->ifr_ifru.ifru_data);
  82                 break;
  83         default:
  84                 rc = -EOPNOTSUPP;
  85         }
  86         if (rc)
  87                 QETH_CARD_TEXT_(card, 2, "ioce%d", rc);
  88         return rc;
  89 }
  90
  91 static int qeth_l2_verify_dev(struct net_device *dev)
  92 {
  93         struct qeth_card *card;
  94         unsigned long flags;
  95         int rc = 0;
  96
  97         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
  98         list_for_each_entry(card, &qeth_core_card_list.list, list) {
  99                 if (card->dev == dev) {
 100                         rc = QETH_REAL_CARD;
 101                         break;
 102                 }
 103         }
 104         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
 105
 106         return rc;
 107 }
 108
 109 static struct net_device *qeth_l2_netdev_by_devno(unsigned char *read_dev_no)
 110 {
 111         struct qeth_card *card;
 112         struct net_device *ndev;
 113         __u16 temp_dev_no;
 114         unsigned long flags;
 115         struct ccw_dev_id read_devid;
 116
 117         ndev = NULL;
 118         memcpy(&temp_dev_no, read_dev_no, 2);
 119         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
 120         list_for_each_entry(card, &qeth_core_card_list.list, list) {
 121                 ccw_device_get_id(CARD_RDEV(card), &read_devid);
 122                 if (read_devid.devno == temp_dev_no) {
 123                         ndev = card->dev;
 124                         break;
 125                 }
 126         }
 127         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
 128         return ndev;
 129 }
 130
 131 static int qeth_setdel_makerc(struct qeth_card *card, int retcode)
 132 {
 133         int rc;
 134
 135         if (retcode)
 136                 QETH_CARD_TEXT_(card, 2, "err%04x", retcode);
 137         switch (retcode) {
 138         case IPA_RC_SUCCESS:
 139                 rc = 0;
 140                 break;
 141         case IPA_RC_L2_UNSUPPORTED_CMD:
 142                 rc = -EOPNOTSUPP;
 143                 break;
 144         case IPA_RC_L2_ADDR_TABLE_FULL:
 145                 rc = -ENOSPC;
 146                 break;
 147         case IPA_RC_L2_DUP_MAC:
 148         case IPA_RC_L2_DUP_LAYER3_MAC:
 149                 rc = -EEXIST;
 150                 break;
 151         case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
 152         case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
 153                 rc = -EPERM;
 154                 break;
 155         case IPA_RC_L2_MAC_NOT_FOUND:
 156                 rc = -ENOENT;
 157                 break;
 158         case -ENOMEM:
 159                 rc = -ENOMEM;
 160                 break;
 161         default:
 162                 rc = -EIO;
 163                 break;
 164         }
 165         return rc;
 166 }
 167
 168 static int qeth_l2_send_setgroupmac(struct qeth_card *card, __u8 *mac)
 169 {
 170         int rc;
 171
 172         QETH_CARD_TEXT(card, 2, "L2Sgmac");
 173         rc = qeth_setdel_makerc(card, qeth_l2_send_setdelmac(card, mac,
 174                                         IPA_CMD_SETGMAC));
 175         if (rc == -EEXIST)
 176                 QETH_DBF_MESSAGE(2, "Group MAC %pM already existing on %s\n",
 177                         mac, QETH_CARD_IFNAME(card));
 178         else if (rc)
 179                 QETH_DBF_MESSAGE(2, "Could not set group MAC %pM on %s: %d\n",
 180                         mac, QETH_CARD_IFNAME(card), rc);
 181         return rc;
 182 }
 183
 184 static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac)
 185 {
 186         int rc;
 187
 188         QETH_CARD_TEXT(card, 2, "L2Dgmac");
 189         rc = qeth_setdel_makerc(card, qeth_l2_send_setdelmac(card, mac,
 190                                         IPA_CMD_DELGMAC));
 191         if (rc)
 192                 QETH_DBF_MESSAGE(2,
 193                         "Could not delete group MAC %pM on %s: %d\n",
 194                         mac, QETH_CARD_IFNAME(card), rc);
 195         return rc;
 196 }
 197
 198 static inline u32 qeth_l2_mac_hash(const u8 *addr)
 199 {
 200         return get_unaligned((u32 *)(&addr[2]));
 201 }
 202
 203 static int qeth_l2_write_mac(struct qeth_card *card, struct qeth_mac *mac)
 204 {
 205
 206         int rc;
 207
 208         if (mac->is_uc) {
 209                 rc = qeth_setdel_makerc(card,
 210                                 qeth_l2_send_setdelmac(card, mac->mac_addr,
 211                                                 IPA_CMD_SETVMAC));
 212         } else {
 213                 rc = qeth_setdel_makerc(card,
 214                                 qeth_l2_send_setgroupmac(card, mac->mac_addr));
 215         }
 216         return rc;
 217 }
 218
 219 static void qeth_l2_del_all_macs(struct qeth_card *card, int del)
 220 {
 221         struct qeth_mac *mac;
 222         struct hlist_node *tmp;
 223         int i;
 224
 225         spin_lock_bh(&card->mclock);
 226         hash_for_each_safe(card->mac_htable, i, tmp, mac, hnode) {
 227                 if (del) {
 228                         if (mac->is_uc)
 229                                 qeth_l2_send_setdelmac(card, mac->mac_addr,
 230                                                 IPA_CMD_DELVMAC);
 231                         else
 232                                 qeth_l2_send_delgroupmac(card, mac->mac_addr);
 233                 }
 234                 hash_del(&mac->hnode);
 235                 kfree(mac);
 236         }
 237         spin_unlock_bh(&card->mclock);
 238 }
 239
 240 static inline int qeth_l2_get_cast_type(struct qeth_card *card,
 241                         struct sk_buff *skb)
 242 {
 243         if (card->info.type == QETH_CARD_TYPE_OSN)
 244                 return RTN_UNSPEC;
 245         if (is_broadcast_ether_addr(skb->data))
 246                 return RTN_BROADCAST;
 247         if (is_multicast_ether_addr(skb->data))
 248                 return RTN_MULTICAST;
 249         return RTN_UNSPEC;
 250 }
 251
 252 static inline void qeth_l2_hdr_csum(struct qeth_card *card,
 253                                     struct qeth_hdr *hdr, struct sk_buff *skb)
 254 {
 255         struct iphdr *iph = ip_hdr(skb);
 256
 257         /* tcph->check contains already the pseudo hdr checksum
 258          * so just set the header flags
 259          */
 260         if (iph->protocol == IPPROTO_UDP)
 261                 hdr->hdr.l2.flags[1] |= QETH_HDR_EXT_UDP;
 262         hdr->hdr.l2.flags[1] |= QETH_HDR_EXT_CSUM_TRANSP_REQ |
 263                 QETH_HDR_EXT_CSUM_HDR_REQ;
 264         iph->check = 0;
 265         if (card->options.performance_stats)
 266                 card->perf_stats.tx_csum++;
 267 }
 268
 269 static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
 270                         struct sk_buff *skb, int cast_type)
 271 {
 272         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
 273
 274         memset(hdr, 0, sizeof(struct qeth_hdr));
 275         hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
 276
 277         /* set byte byte 3 to casting flags */
 278         if (cast_type == RTN_MULTICAST)
 279                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 280         else if (cast_type == RTN_BROADCAST)
 281                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 282         else
 283                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 284
 285         hdr->hdr.l2.pkt_length = skb->len-QETH_HEADER_SIZE;
 286         /* VSWITCH relies on the VLAN
 287          * information to be present in
 288          * the QDIO header */
 289         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
 290                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
 291                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
 292         }
 293 }
 294
 295 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
 296                         struct qeth_reply *reply, unsigned long data)
 297 {
 298         struct qeth_ipa_cmd *cmd;
 299
 300         QETH_CARD_TEXT(card, 2, "L2sdvcb");
 301         cmd = (struct qeth_ipa_cmd *) data;
 302         if (cmd->hdr.return_code) {
 303                 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x. "
 304                           "Continuing\n", cmd->data.setdelvlan.vlan_id,
 305                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 306                 QETH_CARD_TEXT_(card, 2, "L2VL%4x", cmd->hdr.command);
 307                 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code);
 308         }
 309         return 0;
 310 }
 311
 312 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
 313                                 enum qeth_ipa_cmds ipacmd)
 314 {
 315         struct qeth_ipa_cmd *cmd;
 316         struct qeth_cmd_buffer *iob;
 317
 318         QETH_CARD_TEXT_(card, 4, "L2sdv%x", ipacmd);
 319         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 320         if (!iob)
 321                 return -ENOMEM;
 322         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 323         cmd->data.setdelvlan.vlan_id = i;
 324         return qeth_send_ipa_cmd(card, iob,
 325                                  qeth_l2_send_setdelvlan_cb, NULL);
 326 }
 327
 328 static void qeth_l2_process_vlans(struct qeth_card *card)
 329 {
 330         struct qeth_vlan_vid *id;
 331         QETH_CARD_TEXT(card, 3, "L2prcvln");
 332         spin_lock_bh(&card->vlanlock);
 333         list_for_each_entry(id, &card->vid_list, list) {
 334                 qeth_l2_send_setdelvlan(card, id->vid, IPA_CMD_SETVLAN);
 335         }
 336         spin_unlock_bh(&card->vlanlock);
 337 }
 338
 339 static int qeth_l2_vlan_rx_add_vid(struct net_device *dev,
 340                                    __be16 proto, u16 vid)
 341 {
 342         struct qeth_card *card = dev->ml_priv;
 343         struct qeth_vlan_vid *id;
 344         int rc;
 345
 346         QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
 347         if (!vid)
 348                 return 0;
 349         if (card->info.type == QETH_CARD_TYPE_OSM) {
 350                 QETH_CARD_TEXT(card, 3, "aidOSM");
 351                 return 0;
 352         }
 353         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 354                 QETH_CARD_TEXT(card, 3, "aidREC");
 355                 return 0;
 356         }
 357         id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
 358         if (id) {
 359                 id->vid = vid;
 360                 rc = qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
 361                 if (rc) {
 362                         kfree(id);
 363                         return rc;
 364                 }
 365                 spin_lock_bh(&card->vlanlock);
 366                 list_add_tail(&id->list, &card->vid_list);
 367                 spin_unlock_bh(&card->vlanlock);
 368         } else {
 369                 return -ENOMEM;
 370         }
 371         return 0;
 372 }
 373
 374 static int qeth_l2_vlan_rx_kill_vid(struct net_device *dev,
 375                                     __be16 proto, u16 vid)
 376 {
 377         struct qeth_vlan_vid *id, *tmpid = NULL;
 378         struct qeth_card *card = dev->ml_priv;
 379         int rc = 0;
 380
 381         QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
 382         if (card->info.type == QETH_CARD_TYPE_OSM) {
 383                 QETH_CARD_TEXT(card, 3, "kidOSM");
 384                 return 0;
 385         }
 386         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 387                 QETH_CARD_TEXT(card, 3, "kidREC");
 388                 return 0;
 389         }
 390         spin_lock_bh(&card->vlanlock);
 391         list_for_each_entry(id, &card->vid_list, list) {
 392                 if (id->vid == vid) {
 393                         list_del(&id->list);
 394                         tmpid = id;
 395                         break;
 396                 }
 397         }
 398         spin_unlock_bh(&card->vlanlock);
 399         if (tmpid) {
 400                 rc = qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 401                 kfree(tmpid);
 402         }
 403         qeth_l2_set_rx_mode(card->dev);
 404         return rc;
 405 }
 406
 407 static netdev_features_t qeth_l2_fix_features(struct net_device *dev,
 408                                               netdev_features_t features)
 409 {
 410         struct qeth_card *card = dev->ml_priv;
 411
 412         QETH_DBF_TEXT(SETUP, 2, "fixfeat");
 413         if (!qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM))
 414                 features &= ~NETIF_F_IP_CSUM;
 415         if (!qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
 416                 features &= ~NETIF_F_RXCSUM;
 417         QETH_DBF_HEX(SETUP, 2, &features, sizeof(features));
 418         return features;
 419 }
 420
 421 static int qeth_l2_set_features(struct net_device *dev,
 422                                 netdev_features_t features)
 423 {
 424         struct qeth_card *card = dev->ml_priv;
 425         netdev_features_t changed = dev->features ^ features;
 426
 427         QETH_DBF_TEXT(SETUP, 2, "setfeat");
 428         QETH_DBF_HEX(SETUP, 2, &features, sizeof(features));
 429
 430         if (card->state == CARD_STATE_DOWN ||
 431             card->state == CARD_STATE_RECOVER)
 432                 return 0;
 433
 434         if (!(changed & NETIF_F_RXCSUM))
 435                 return 0;
 436         return qeth_set_rx_csum(card, features & NETIF_F_RXCSUM ? 1 : 0);
 437 }
 438
 439 static void qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
 440 {
 441         QETH_DBF_TEXT(SETUP , 2, "stopcard");
 442         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 443
 444         qeth_set_allowed_threads(card, 0, 1);
 445         if (card->read.state == CH_STATE_UP &&
 446             card->write.state == CH_STATE_UP &&
 447             (card->state == CARD_STATE_UP)) {
 448                 if (recovery_mode &&
 449                     card->info.type != QETH_CARD_TYPE_OSN) {
 450                         qeth_l2_stop(card->dev);
 451                 } else {
 452                         rtnl_lock();
 453                         dev_close(card->dev);
 454                         rtnl_unlock();
 455                 }
 456                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 457                 card->state = CARD_STATE_SOFTSETUP;
 458         }
 459         if (card->state == CARD_STATE_SOFTSETUP) {
 460                 qeth_l2_del_all_macs(card, 0);
 461                 qeth_clear_ipacmd_list(card);
 462                 card->state = CARD_STATE_HARDSETUP;
 463         }
 464         if (card->state == CARD_STATE_HARDSETUP) {
 465                 qeth_qdio_clear_card(card, 0);
 466                 qeth_clear_qdio_buffers(card);
 467                 qeth_clear_working_pool_list(card);
 468                 card->state = CARD_STATE_DOWN;
 469         }
 470         if (card->state == CARD_STATE_DOWN) {
 471                 qeth_clear_cmd_buffers(&card->read);
 472                 qeth_clear_cmd_buffers(&card->write);
 473         }
 474 }
 475
 476 static int qeth_l2_process_inbound_buffer(struct qeth_card *card,
 477                                 int budget, int *done)
 478 {
 479         int work_done = 0;
 480         struct sk_buff *skb;
 481         struct qeth_hdr *hdr;
 482         unsigned int len;
 483
 484         *done = 0;
 485         WARN_ON_ONCE(!budget);
 486         while (budget) {
 487                 skb = qeth_core_get_next_skb(card,
 488                         &card->qdio.in_q->bufs[card->rx.b_index],
 489                         &card->rx.b_element, &card->rx.e_offset, &hdr);
 490                 if (!skb) {
 491                         *done = 1;
 492                         break;
 493                 }
 494                 skb->dev = card->dev;
 495                 switch (hdr->hdr.l2.id) {
 496                 case QETH_HEADER_TYPE_LAYER2:
 497                         skb->pkt_type = PACKET_HOST;
 498                         skb->protocol = eth_type_trans(skb, skb->dev);
 499                         if ((card->dev->features & NETIF_F_RXCSUM)
 500                            && ((hdr->hdr.l2.flags[1] &
 501                                 (QETH_HDR_EXT_CSUM_HDR_REQ |
 502                                    QETH_HDR_EXT_CSUM_TRANSP_REQ)) ==
 503                                 (QETH_HDR_EXT_CSUM_HDR_REQ |
 504                                    QETH_HDR_EXT_CSUM_TRANSP_REQ)))
 505                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 506                         else
 507                                 skb->ip_summed = CHECKSUM_NONE;
 508                         if (skb->protocol == htons(ETH_P_802_2))
 509                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
 510                         len = skb->len;
 511                         napi_gro_receive(&card->napi, skb);
 512                         break;
 513                 case QETH_HEADER_TYPE_OSN:
 514                         if (card->info.type == QETH_CARD_TYPE_OSN) {
 515                                 skb_push(skb, sizeof(struct qeth_hdr));
 516                                 skb_copy_to_linear_data(skb, hdr,
 517                                                 sizeof(struct qeth_hdr));
 518                                 len = skb->len;
 519                                 card->osn_info.data_cb(skb);
 520                                 break;
 521                         }
 522                         /* else unknown */
 523                 default:
 524                         dev_kfree_skb_any(skb);
 525                         QETH_CARD_TEXT(card, 3, "inbunkno");
 526                         QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
 527                         continue;
 528                 }
 529                 work_done++;
 530                 budget--;
 531                 card->stats.rx_packets++;
 532                 card->stats.rx_bytes += len;
 533         }
 534         return work_done;
 535 }
 536
 537 static int qeth_l2_poll(struct napi_struct *napi, int budget)
 538 {
 539         struct qeth_card *card = container_of(napi, struct qeth_card, napi);
 540         int work_done = 0;
 541         struct qeth_qdio_buffer *buffer;
 542         int done;
 543         int new_budget = budget;
 544
 545         if (card->options.performance_stats) {
 546                 card->perf_stats.inbound_cnt++;
 547                 card->perf_stats.inbound_start_time = qeth_get_micros();
 548         }
 549
 550         while (1) {
 551                 if (!card->rx.b_count) {
 552                         card->rx.qdio_err = 0;
 553                         card->rx.b_count = qdio_get_next_buffers(
 554                                 card->data.ccwdev, 0, &card->rx.b_index,
 555                                 &card->rx.qdio_err);
 556                         if (card->rx.b_count <= 0) {
 557                                 card->rx.b_count = 0;
 558                                 break;
 559                         }
 560                         card->rx.b_element =
 561                                 &card->qdio.in_q->bufs[card->rx.b_index]
 562                                 .buffer->element[0];
 563                         card->rx.e_offset = 0;
 564                 }
 565
 566                 while (card->rx.b_count) {
 567                         buffer = &card->qdio.in_q->bufs[card->rx.b_index];
 568                         if (!(card->rx.qdio_err &&
 569                             qeth_check_qdio_errors(card, buffer->buffer,
 570                             card->rx.qdio_err, "qinerr")))
 571                                 work_done += qeth_l2_process_inbound_buffer(
 572                                         card, new_budget, &done);
 573                         else
 574                                 done = 1;
 575
 576                         if (done) {
 577                                 if (card->options.performance_stats)
 578                                         card->perf_stats.bufs_rec++;
 579                                 qeth_put_buffer_pool_entry(card,
 580                                         buffer->pool_entry);
 581                                 qeth_queue_input_buffer(card, card->rx.b_index);
 582                                 card->rx.b_count--;
 583                                 if (card->rx.b_count) {
 584                                         card->rx.b_index =
 585                                                 (card->rx.b_index + 1) %
 586                                                 QDIO_MAX_BUFFERS_PER_Q;
 587                                         card->rx.b_element =
 588                                                 &card->qdio.in_q
 589                                                 ->bufs[card->rx.b_index]
 590                                                 .buffer->element[0];
 591                                         card->rx.e_offset = 0;
 592                                 }
 593                         }
 594
 595                         if (work_done >= budget)
 596                                 goto out;
 597                         else
 598                                 new_budget = budget - work_done;
 599                 }
 600         }
 601
 602         napi_complete(napi);
 603         if (qdio_start_irq(card->data.ccwdev, 0))
 604                 napi_schedule(&card->napi);
 605 out:
 606         if (card->options.performance_stats)
 607                 card->perf_stats.inbound_time += qeth_get_micros() -
 608                         card->perf_stats.inbound_start_time;
 609         return work_done;
 610 }
 611
 612 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
 613                            enum qeth_ipa_cmds ipacmd)
 614 {
 615         struct qeth_ipa_cmd *cmd;
 616         struct qeth_cmd_buffer *iob;
 617
 618         QETH_CARD_TEXT(card, 2, "L2sdmac");
 619         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 620         if (!iob)
 621                 return -ENOMEM;
 622         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 623         cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
 624         memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
 625         return qeth_send_ipa_cmd(card, iob, NULL, NULL);
 626 }
 627
 628 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
 629 {
 630         int rc;
 631
 632         QETH_CARD_TEXT(card, 2, "L2Setmac");
 633         rc = qeth_setdel_makerc(card, qeth_l2_send_setdelmac(card, mac,
 634                                         IPA_CMD_SETVMAC));
 635         if (rc == 0) {
 636                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 637                 memcpy(card->dev->dev_addr, mac, OSA_ADDR_LEN);
 638                 dev_info(&card->gdev->dev,
 639                         "MAC address %pM successfully registered on device %s\n",
 640                         card->dev->dev_addr, card->dev->name);
 641         } else {
 642                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 643                 switch (rc) {
 644                 case -EEXIST:
 645                         dev_warn(&card->gdev->dev,
 646                                 "MAC address %pM already exists\n", mac);
 647                         break;
 648                 case -EPERM:
 649                         dev_warn(&card->gdev->dev,
 650                                 "MAC address %pM is not authorized\n", mac);
 651                         break;
 652                 }
 653         }
 654         return rc;
 655 }
 656
 657 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
 658 {
 659         int rc;
 660
 661         QETH_CARD_TEXT(card, 2, "L2Delmac");
 662         if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
 663                 return 0;
 664         rc = qeth_setdel_makerc(card, qeth_l2_send_setdelmac(card, mac,
 665                                         IPA_CMD_DELVMAC));
 666         if (rc == 0)
 667                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 668         return rc;
 669 }
 670
 671 static int qeth_l2_request_initial_mac(struct qeth_card *card)
 672 {
 673         int rc = 0;
 674         char vendor_pre[] = {0x02, 0x00, 0x00};
 675
 676         QETH_DBF_TEXT(SETUP, 2, "doL2init");
 677         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
 678
 679         if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
 680                 rc = qeth_query_setadapterparms(card);
 681                 if (rc) {
 682                         QETH_DBF_MESSAGE(2, "could not query adapter "
 683                                 "parameters on device %s: x%x\n",
 684                                 CARD_BUS_ID(card), rc);
 685                 }
 686         }
 687
 688         if (card->info.type == QETH_CARD_TYPE_IQD ||
 689             card->info.type == QETH_CARD_TYPE_OSM ||
 690             card->info.type == QETH_CARD_TYPE_OSX ||
 691             card->info.guestlan) {
 692                 rc = qeth_setadpparms_change_macaddr(card);
 693                 if (rc) {
 694                         QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
 695                                 "device %s: x%x\n", CARD_BUS_ID(card), rc);
 696                         QETH_DBF_TEXT_(SETUP, 2, "1err%04x", rc);
 697                         return rc;
 698                 }
 699                 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN);
 700         } else {
 701                 eth_random_addr(card->dev->dev_addr);
 702                 memcpy(card->dev->dev_addr, vendor_pre, 3);
 703         }
 704         return 0;
 705 }
 706
 707 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 708 {
 709         struct sockaddr *addr = p;
 710         struct qeth_card *card = dev->ml_priv;
 711         int rc = 0;
 712
 713         QETH_CARD_TEXT(card, 3, "setmac");
 714
 715         if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
 716                 QETH_CARD_TEXT(card, 3, "setmcINV");
 717                 return -EOPNOTSUPP;
 718         }
 719
 720         if (card->info.type == QETH_CARD_TYPE_OSN ||
 721             card->info.type == QETH_CARD_TYPE_OSM ||
 722             card->info.type == QETH_CARD_TYPE_OSX) {
 723                 QETH_CARD_TEXT(card, 3, "setmcTYP");
 724                 return -EOPNOTSUPP;
 725         }
 726         QETH_CARD_HEX(card, 3, addr->sa_data, OSA_ADDR_LEN);
 727         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 728                 QETH_CARD_TEXT(card, 3, "setmcREC");
 729                 return -ERESTARTSYS;
 730         }
 731         rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
 732         if (!rc || (rc == -ENOENT))
 733                 rc = qeth_l2_send_setmac(card, addr->sa_data);
 734         return rc ? -EINVAL : 0;
 735 }
 736
 737 static void qeth_promisc_to_bridge(struct qeth_card *card)
 738 {
 739         struct net_device *dev = card->dev;
 740         enum qeth_ipa_promisc_modes promisc_mode;
 741         int role;
 742         int rc;
 743
 744         QETH_CARD_TEXT(card, 3, "pmisc2br");
 745
 746         if (!card->options.sbp.reflect_promisc)
 747                 return;
 748         promisc_mode = (dev->flags & IFF_PROMISC) ? SET_PROMISC_MODE_ON
 749                                                 : SET_PROMISC_MODE_OFF;
 750         if (promisc_mode == card->info.promisc_mode)
 751                 return;
 752
 753         if (promisc_mode == SET_PROMISC_MODE_ON) {
 754                 if (card->options.sbp.reflect_promisc_primary)
 755                         role = QETH_SBP_ROLE_PRIMARY;
 756                 else
 757                         role = QETH_SBP_ROLE_SECONDARY;
 758         } else
 759                 role = QETH_SBP_ROLE_NONE;
 760
 761         rc = qeth_bridgeport_setrole(card, role);
 762         QETH_DBF_TEXT_(SETUP, 2, "bpm%c%04x",
 763                         (promisc_mode == SET_PROMISC_MODE_ON) ? '+' : '-', rc);
 764         if (!rc) {
 765                 card->options.sbp.role = role;
 766                 card->info.promisc_mode = promisc_mode;
 767         }
 768
 769 }
 770 /* New MAC address is added to the hash table and marked to be written on card
 771  * only if there is not in the hash table storage already
 772  *
 773 */
 774 static  void
 775 qeth_l2_add_mac(struct qeth_card *card, struct netdev_hw_addr *ha, u8 is_uc)
 776 {
 777         struct qeth_mac *mac;
 778
 779         hash_for_each_possible(card->mac_htable, mac, hnode,
 780                         qeth_l2_mac_hash(ha->addr)) {
 781                 if (is_uc == mac->is_uc &&
 782                     !memcmp(ha->addr, mac->mac_addr, OSA_ADDR_LEN)) {
 783                         mac->disp_flag = QETH_DISP_MAC_DO_NOTHING;
 784                         return;
 785                 }
 786         }
 787
 788         mac = kzalloc(sizeof(struct qeth_mac), GFP_ATOMIC);
 789
 790         if (!mac)
 791                 return;
 792
 793         memcpy(mac->mac_addr, ha->addr, OSA_ADDR_LEN);
 794         mac->is_uc = is_uc;
 795         mac->disp_flag = QETH_DISP_MAC_ADD;
 796
 797         hash_add(card->mac_htable, &mac->hnode,
 798                         qeth_l2_mac_hash(mac->mac_addr));
 799
 800 }
 801
 802 static void qeth_l2_set_rx_mode(struct net_device *dev)
 803 {
 804         struct qeth_card *card = dev->ml_priv;
 805         struct netdev_hw_addr *ha;
 806         struct qeth_mac *mac;
 807         struct hlist_node *tmp;
 808         int i;
 809         int rc;
 810
 811         if (card->info.type == QETH_CARD_TYPE_OSN)
 812                 return;
 813
 814         QETH_CARD_TEXT(card, 3, "setmulti");
 815         if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
 816             (card->state != CARD_STATE_UP))
 817                 return;
 818
 819         spin_lock_bh(&card->mclock);
 820
 821         netdev_for_each_mc_addr(ha, dev)
 822                 qeth_l2_add_mac(card, ha, 0);
 823
 824         netdev_for_each_uc_addr(ha, dev)
 825                 qeth_l2_add_mac(card, ha, 1);
 826
 827         hash_for_each_safe(card->mac_htable, i, tmp, mac, hnode) {
 828                 if (mac->disp_flag == QETH_DISP_MAC_DELETE) {
 829                         if (!mac->is_uc)
 830                                 rc = qeth_l2_send_delgroupmac(card,
 831                                                 mac->mac_addr);
 832                         else {
 833                                 rc = qeth_l2_send_setdelmac(card, mac->mac_addr,
 834                                                 IPA_CMD_DELVMAC);
 835                         }
 836
 837                         hash_del(&mac->hnode);
 838                         kfree(mac);
 839
 840                 } else if (mac->disp_flag == QETH_DISP_MAC_ADD) {
 841                         rc = qeth_l2_write_mac(card, mac);
 842                         if (rc) {
 843                                 hash_del(&mac->hnode);
 844                                 kfree(mac);
 845                         } else
 846                                 mac->disp_flag = QETH_DISP_MAC_DELETE;
 847                 } else
 848                         mac->disp_flag = QETH_DISP_MAC_DELETE;
 849         }
 850
 851         spin_unlock_bh(&card->mclock);
 852
 853         if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
 854                 qeth_setadp_promisc_mode(card);
 855         else
 856                 qeth_promisc_to_bridge(card);
 857 }
 858
 859 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 860 {
 861         int rc;
 862         struct qeth_hdr *hdr = NULL;
 863         int elements = 0;
 864         struct qeth_card *card = dev->ml_priv;
 865         struct sk_buff *new_skb = skb;
 866         int cast_type = qeth_l2_get_cast_type(card, skb);
 867         struct qeth_qdio_out_q *queue;
 868         int tx_bytes = skb->len;
 869         int data_offset = -1;
 870         int elements_needed = 0;
 871         int hd_len = 0;
 872
 873         if (card->qdio.do_prio_queueing || (cast_type &&
 874                                         card->info.is_multicast_different))
 875                 queue = card->qdio.out_qs[qeth_get_priority_queue(card, skb,
 876                                         qeth_get_ip_version(skb), cast_type)];
 877         else
 878                 queue = card->qdio.out_qs[card->qdio.default_out_queue];
 879
 880         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
 881                 card->stats.tx_carrier_errors++;
 882                 goto tx_drop;
 883         }
 884
 885         if ((card->info.type == QETH_CARD_TYPE_OSN) &&
 886             (skb->protocol == htons(ETH_P_IPV6)))
 887                 goto tx_drop;
 888
 889         if (card->options.performance_stats) {
 890                 card->perf_stats.outbound_cnt++;
 891                 card->perf_stats.outbound_start_time = qeth_get_micros();
 892         }
 893         netif_stop_queue(dev);
 894
 895         if (card->info.type == QETH_CARD_TYPE_OSN)
 896                 hdr = (struct qeth_hdr *)skb->data;
 897         else {
 898                 if (card->info.type == QETH_CARD_TYPE_IQD) {
 899                         new_skb = skb;
 900                         data_offset = ETH_HLEN;
 901                         hd_len = ETH_HLEN;
 902                         hdr = kmem_cache_alloc(qeth_core_header_cache,
 903                                                 GFP_ATOMIC);
 904                         if (!hdr)
 905                                 goto tx_drop;
 906                         elements_needed++;
 907                         skb_reset_mac_header(new_skb);
 908                         qeth_l2_fill_header(card, hdr, new_skb, cast_type);
 909                         hdr->hdr.l2.pkt_length = new_skb->len;
 910                         memcpy(((char *)hdr) + sizeof(struct qeth_hdr),
 911                                 skb_mac_header(new_skb), ETH_HLEN);
 912                 } else {
 913                         /* create a clone with writeable headroom */
 914                         new_skb = skb_realloc_headroom(skb,
 915                                                 sizeof(struct qeth_hdr));
 916                         if (!new_skb)
 917                                 goto tx_drop;
 918                         hdr = (struct qeth_hdr *)skb_push(new_skb,
 919                                                 sizeof(struct qeth_hdr));
 920                         skb_set_mac_header(new_skb, sizeof(struct qeth_hdr));
 921                         qeth_l2_fill_header(card, hdr, new_skb, cast_type);
 922                         if (new_skb->ip_summed == CHECKSUM_PARTIAL)
 923                                 qeth_l2_hdr_csum(card, hdr, new_skb);
 924                 }
 925         }
 926
 927         elements = qeth_get_elements_no(card, new_skb, elements_needed);
 928         if (!elements) {
 929                 if (data_offset >= 0)
 930                         kmem_cache_free(qeth_core_header_cache, hdr);
 931                 goto tx_drop;
 932         }
 933
 934         if (card->info.type != QETH_CARD_TYPE_IQD) {
 935                 if (qeth_hdr_chk_and_bounce(new_skb, &hdr,
 936                     sizeof(struct qeth_hdr_layer2)))
 937                         goto tx_drop;
 938                 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
 939                                          elements);
 940         } else
 941                 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
 942                                         elements, data_offset, hd_len);
 943         if (!rc) {
 944                 card->stats.tx_packets++;
 945                 card->stats.tx_bytes += tx_bytes;
 946                 if (new_skb != skb)
 947                         dev_kfree_skb_any(skb);
 948                 rc = NETDEV_TX_OK;
 949         } else {
 950                 if (data_offset >= 0)
 951                         kmem_cache_free(qeth_core_header_cache, hdr);
 952
 953                 if (rc == -EBUSY) {
 954                         if (new_skb != skb)
 955                                 dev_kfree_skb_any(new_skb);
 956                         return NETDEV_TX_BUSY;
 957                 } else
 958                         goto tx_drop;
 959         }
 960
 961         netif_wake_queue(dev);
 962         if (card->options.performance_stats)
 963                 card->perf_stats.outbound_time += qeth_get_micros() -
 964                         card->perf_stats.outbound_start_time;
 965         return rc;
 966
 967 tx_drop:
 968         card->stats.tx_dropped++;
 969         card->stats.tx_errors++;
 970         if ((new_skb != skb) && new_skb)
 971                 dev_kfree_skb_any(new_skb);
 972         dev_kfree_skb_any(skb);
 973         netif_wake_queue(dev);
 974         return NETDEV_TX_OK;
 975 }
 976
 977 static int __qeth_l2_open(struct net_device *dev)
 978 {
 979         struct qeth_card *card = dev->ml_priv;
 980         int rc = 0;
 981
 982         QETH_CARD_TEXT(card, 4, "qethopen");
 983         if (card->state == CARD_STATE_UP)
 984                 return rc;
 985         if (card->state != CARD_STATE_SOFTSETUP)
 986                 return -ENODEV;
 987
 988         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
 989              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
 990                 QETH_CARD_TEXT(card, 4, "nomacadr");
 991                 return -EPERM;
 992         }
 993         card->data.state = CH_STATE_UP;
 994         card->state = CARD_STATE_UP;
 995         netif_start_queue(dev);
 996
 997         if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) {
 998                 napi_enable(&card->napi);
 999                 napi_schedule(&card->napi);
1000         } else
1001                 rc = -EIO;
1002         return rc;
1003 }
1004
1005 static int qeth_l2_open(struct net_device *dev)
1006 {
1007         struct qeth_card *card = dev->ml_priv;
1008
1009         QETH_CARD_TEXT(card, 5, "qethope_");
1010         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
1011                 QETH_CARD_TEXT(card, 3, "openREC");
1012                 return -ERESTARTSYS;
1013         }
1014         return __qeth_l2_open(dev);
1015 }
1016
1017 static int qeth_l2_stop(struct net_device *dev)
1018 {
1019         struct qeth_card *card = dev->ml_priv;
1020
1021         QETH_CARD_TEXT(card, 4, "qethstop");
1022         netif_tx_disable(dev);
1023         if (card->state == CARD_STATE_UP) {
1024                 card->state = CARD_STATE_SOFTSETUP;
1025                 napi_disable(&card->napi);
1026         }
1027         return 0;
1028 }
1029
1030 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
1031 {
1032         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1033
1034         qeth_l2_create_device_attributes(&gdev->dev);
1035         INIT_LIST_HEAD(&card->vid_list);
1036         hash_init(card->mac_htable);
1037         card->options.layer2 = 1;
1038         card->info.hwtrap = 0;
1039         return 0;
1040 }
1041
1042 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
1043 {
1044         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1045
1046         qeth_l2_remove_device_attributes(&cgdev->dev);
1047         qeth_set_allowed_threads(card, 0, 1);
1048         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1049
1050         if (cgdev->state == CCWGROUP_ONLINE)
1051                 qeth_l2_set_offline(cgdev);
1052
1053         if (card->dev) {
1054                 unregister_netdev(card->dev);
1055                 card->dev = NULL;
1056         }
1057         return;
1058 }
1059
1060 static const struct ethtool_ops qeth_l2_ethtool_ops = {
1061         .get_link = ethtool_op_get_link,
1062         .get_strings = qeth_core_get_strings,
1063         .get_ethtool_stats = qeth_core_get_ethtool_stats,
1064         .get_sset_count = qeth_core_get_sset_count,
1065         .get_drvinfo = qeth_core_get_drvinfo,
1066         .get_settings = qeth_core_ethtool_get_settings,
1067 };
1068
1069 static const struct ethtool_ops qeth_l2_osn_ops = {
1070         .get_strings = qeth_core_get_strings,
1071         .get_ethtool_stats = qeth_core_get_ethtool_stats,
1072         .get_sset_count = qeth_core_get_sset_count,
1073         .get_drvinfo = qeth_core_get_drvinfo,
1074 };
1075
1076 static const struct net_device_ops qeth_l2_netdev_ops = {
1077         .ndo_open               = qeth_l2_open,
1078         .ndo_stop               = qeth_l2_stop,
1079         .ndo_get_stats          = qeth_get_stats,
1080         .ndo_start_xmit         = qeth_l2_hard_start_xmit,
1081         .ndo_validate_addr      = eth_validate_addr,
1082         .ndo_set_rx_mode        = qeth_l2_set_rx_mode,
1083         .ndo_do_ioctl           = qeth_l2_do_ioctl,
1084         .ndo_set_mac_address    = qeth_l2_set_mac_address,
1085         .ndo_change_mtu         = qeth_change_mtu,
1086         .ndo_vlan_rx_add_vid    = qeth_l2_vlan_rx_add_vid,
1087         .ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,
1088         .ndo_tx_timeout         = qeth_tx_timeout,
1089         .ndo_fix_features       = qeth_l2_fix_features,
1090         .ndo_set_features       = qeth_l2_set_features
1091 };
1092
1093 static int qeth_l2_setup_netdev(struct qeth_card *card)
1094 {
1095         switch (card->info.type) {
1096         case QETH_CARD_TYPE_IQD:
1097                 card->dev = alloc_netdev(0, "hsi%d", NET_NAME_UNKNOWN,
1098                                          ether_setup);
1099                 break;
1100         case QETH_CARD_TYPE_OSN:
1101                 card->dev = alloc_netdev(0, "osn%d", NET_NAME_UNKNOWN,
1102                                          ether_setup);
1103                 card->dev->flags |= IFF_NOARP;
1104                 break;
1105         default:
1106                 card->dev = alloc_etherdev(0);
1107         }
1108
1109         if (!card->dev)
1110                 return -ENODEV;
1111
1112         card->dev->ml_priv = card;
1113         card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
1114         card->dev->mtu = card->info.initial_mtu;
1115         card->dev->netdev_ops = &qeth_l2_netdev_ops;
1116         card->dev->ethtool_ops =
1117                 (card->info.type != QETH_CARD_TYPE_OSN) ?
1118                 &qeth_l2_ethtool_ops : &qeth_l2_osn_ops;
1119         card->dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
1120         if (card->info.type == QETH_CARD_TYPE_OSD && !card->info.guestlan) {
1121                 card->dev->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
1122                 /* Turn on RX offloading per default */
1123                 card->dev->features |= NETIF_F_RXCSUM;
1124         }
1125         card->info.broadcast_capable = 1;
1126         qeth_l2_request_initial_mac(card);
1127         SET_NETDEV_DEV(card->dev, &card->gdev->dev);
1128         netif_napi_add(card->dev, &card->napi, qeth_l2_poll, QETH_NAPI_WEIGHT);
1129         return register_netdev(card->dev);
1130 }
1131
1132 static int qeth_l2_start_ipassists(struct qeth_card *card)
1133 {
1134         /* configure isolation level */
1135         if (qeth_set_access_ctrl_online(card, 0))
1136                 return -ENODEV;
1137         if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
1138                 qeth_set_rx_csum(card, 1);
1139         qeth_start_ipa_tx_checksum(card);
1140         return 0;
1141 }
1142
1143 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
1144 {
1145         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1146         int rc = 0;
1147         enum qeth_card_states recover_flag;
1148
1149         mutex_lock(&card->discipline_mutex);
1150         mutex_lock(&card->conf_mutex);
1151         QETH_DBF_TEXT(SETUP, 2, "setonlin");
1152         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1153
1154         recover_flag = card->state;
1155         rc = qeth_core_hardsetup_card(card);
1156         if (rc) {
1157                 QETH_DBF_TEXT_(SETUP, 2, "2err%04x", rc);
1158                 rc = -ENODEV;
1159                 goto out_remove;
1160         }
1161         qeth_bridgeport_query_support(card);
1162         if (card->options.sbp.supported_funcs)
1163                 dev_info(&card->gdev->dev,
1164                 "The device represents a Bridge Capable Port\n");
1165         qeth_trace_features(card);
1166
1167         if (!card->dev && qeth_l2_setup_netdev(card)) {
1168                 rc = -ENODEV;
1169                 goto out_remove;
1170         }
1171
1172         if (card->info.type != QETH_CARD_TYPE_OSN)
1173                 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
1174
1175         if (qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP)) {
1176                 if (card->info.hwtrap &&
1177                     qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM))
1178                         card->info.hwtrap = 0;
1179         } else
1180                 card->info.hwtrap = 0;
1181
1182         qeth_l2_setup_bridgeport_attrs(card);
1183
1184         card->state = CARD_STATE_HARDSETUP;
1185         memset(&card->rx, 0, sizeof(struct qeth_rx));
1186         qeth_print_status_message(card);
1187
1188         /* softsetup */
1189         QETH_DBF_TEXT(SETUP, 2, "softsetp");
1190
1191         rc = qeth_send_startlan(card);
1192         if (rc) {
1193                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1194                 if (rc == 0xe080) {
1195                         dev_warn(&card->gdev->dev,
1196                                 "The LAN is offline\n");
1197                         card->lan_online = 0;
1198                         goto contin;
1199                 }
1200                 rc = -ENODEV;
1201                 goto out_remove;
1202         } else
1203                 card->lan_online = 1;
1204
1205 contin:
1206         if ((card->info.type == QETH_CARD_TYPE_OSD) ||
1207             (card->info.type == QETH_CARD_TYPE_OSX)) {
1208                 if (qeth_l2_start_ipassists(card))
1209                         goto out_remove;
1210         }
1211
1212         if (card->info.type != QETH_CARD_TYPE_OSN &&
1213             card->info.type != QETH_CARD_TYPE_OSM)
1214                 qeth_l2_process_vlans(card);
1215
1216         netif_tx_disable(card->dev);
1217
1218         rc = qeth_init_qdio_queues(card);
1219         if (rc) {
1220                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1221                 rc = -ENODEV;
1222                 goto out_remove;
1223         }
1224         card->state = CARD_STATE_SOFTSETUP;
1225         if (card->lan_online)
1226                 netif_carrier_on(card->dev);
1227         else
1228                 netif_carrier_off(card->dev);
1229
1230         qeth_set_allowed_threads(card, 0xffffffff, 0);
1231         if (recover_flag == CARD_STATE_RECOVER) {
1232                 if (recovery_mode &&
1233                     card->info.type != QETH_CARD_TYPE_OSN) {
1234                         __qeth_l2_open(card->dev);
1235                 } else {
1236                         rtnl_lock();
1237                         dev_open(card->dev);
1238                         rtnl_unlock();
1239                 }
1240                 /* this also sets saved unicast addresses */
1241                 qeth_l2_set_rx_mode(card->dev);
1242         }
1243         /* let user_space know that device is online */
1244         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1245         mutex_unlock(&card->conf_mutex);
1246         mutex_unlock(&card->discipline_mutex);
1247         return 0;
1248
1249 out_remove:
1250         qeth_l2_stop_card(card, 0);
1251         ccw_device_set_offline(CARD_DDEV(card));
1252         ccw_device_set_offline(CARD_WDEV(card));
1253         ccw_device_set_offline(CARD_RDEV(card));
1254         qdio_free(CARD_DDEV(card));
1255         if (recover_flag == CARD_STATE_RECOVER)
1256                 card->state = CARD_STATE_RECOVER;
1257         else
1258                 card->state = CARD_STATE_DOWN;
1259         mutex_unlock(&card->conf_mutex);
1260         mutex_unlock(&card->discipline_mutex);
1261         return rc;
1262 }
1263
1264 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1265 {
1266         return __qeth_l2_set_online(gdev, 0);
1267 }
1268
1269 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1270                                         int recovery_mode)
1271 {
1272         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1273         int rc = 0, rc2 = 0, rc3 = 0;
1274         enum qeth_card_states recover_flag;
1275
1276         mutex_lock(&card->discipline_mutex);
1277         mutex_lock(&card->conf_mutex);
1278         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1279         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1280
1281         if (card->dev && netif_carrier_ok(card->dev))
1282                 netif_carrier_off(card->dev);
1283         recover_flag = card->state;
1284         if ((!recovery_mode && card->info.hwtrap) || card->info.hwtrap == 2) {
1285                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1286                 card->info.hwtrap = 1;
1287         }
1288         qeth_l2_stop_card(card, recovery_mode);
1289         rc  = ccw_device_set_offline(CARD_DDEV(card));
1290         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1291         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1292         if (!rc)
1293                 rc = (rc2) ? rc2 : rc3;
1294         if (rc)
1295                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1296         qdio_free(CARD_DDEV(card));
1297         if (recover_flag == CARD_STATE_UP)
1298                 card->state = CARD_STATE_RECOVER;
1299         /* let user_space know that device is offline */
1300         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1301         mutex_unlock(&card->conf_mutex);
1302         mutex_unlock(&card->discipline_mutex);
1303         return 0;
1304 }
1305
1306 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1307 {
1308         return __qeth_l2_set_offline(cgdev, 0);
1309 }
1310
1311 static int qeth_l2_recover(void *ptr)
1312 {
1313         struct qeth_card *card;
1314         int rc = 0;
1315
1316         card = (struct qeth_card *) ptr;
1317         QETH_CARD_TEXT(card, 2, "recover1");
1318         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1319                 return 0;
1320         QETH_CARD_TEXT(card, 2, "recover2");
1321         dev_warn(&card->gdev->dev,
1322                 "A recovery process has been started for the device\n");
1323         qeth_set_recovery_task(card);
1324         __qeth_l2_set_offline(card->gdev, 1);
1325         rc = __qeth_l2_set_online(card->gdev, 1);
1326         if (!rc)
1327                 dev_info(&card->gdev->dev,
1328                         "Device successfully recovered!\n");
1329         else {
1330                 qeth_close_dev(card);
1331                 dev_warn(&card->gdev->dev, "The qeth device driver "
1332                                 "failed to recover an error on the device\n");
1333         }
1334         qeth_clear_recovery_task(card);
1335         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1336         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1337         return 0;
1338 }
1339
1340 static int __init qeth_l2_init(void)
1341 {
1342         pr_info("register layer 2 discipline\n");
1343         return 0;
1344 }
1345
1346 static void __exit qeth_l2_exit(void)
1347 {
1348         pr_info("unregister layer 2 discipline\n");
1349 }
1350
1351 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1352 {
1353         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1354         qeth_set_allowed_threads(card, 0, 1);
1355         if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
1356                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1357         qeth_qdio_clear_card(card, 0);
1358         qeth_clear_qdio_buffers(card);
1359         qdio_free(CARD_DDEV(card));
1360 }
1361
1362 static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev)
1363 {
1364         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1365
1366         if (card->dev)
1367                 netif_device_detach(card->dev);
1368         qeth_set_allowed_threads(card, 0, 1);
1369         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1370         if (gdev->state == CCWGROUP_OFFLINE)
1371                 return 0;
1372         if (card->state == CARD_STATE_UP) {
1373                 if (card->info.hwtrap)
1374                         qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1375                 __qeth_l2_set_offline(card->gdev, 1);
1376         } else
1377                 __qeth_l2_set_offline(card->gdev, 0);
1378         return 0;
1379 }
1380
1381 static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
1382 {
1383         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1384         int rc = 0;
1385
1386         if (gdev->state == CCWGROUP_OFFLINE)
1387                 goto out;
1388
1389         if (card->state == CARD_STATE_RECOVER) {
1390                 rc = __qeth_l2_set_online(card->gdev, 1);
1391                 if (rc) {
1392                         rtnl_lock();
1393                         dev_close(card->dev);
1394                         rtnl_unlock();
1395                 }
1396         } else
1397                 rc = __qeth_l2_set_online(card->gdev, 0);
1398 out:
1399         qeth_set_allowed_threads(card, 0xffffffff, 0);
1400         if (card->dev)
1401                 netif_device_attach(card->dev);
1402         if (rc)
1403                 dev_warn(&card->gdev->dev, "The qeth device driver "
1404                         "failed to recover an error on the device\n");
1405         return rc;
1406 }
1407
1408 /* Returns zero if the command is successfully "consumed" */
1409 static int qeth_l2_control_event(struct qeth_card *card,
1410                                         struct qeth_ipa_cmd *cmd)
1411 {
1412         switch (cmd->hdr.command) {
1413         case IPA_CMD_SETBRIDGEPORT_OSA:
1414         case IPA_CMD_SETBRIDGEPORT_IQD:
1415                 if (cmd->data.sbp.hdr.command_code ==
1416                                 IPA_SBP_BRIDGE_PORT_STATE_CHANGE) {
1417                         qeth_bridge_state_change(card, cmd);
1418                         return 0;
1419                 } else
1420                         return 1;
1421         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
1422                 qeth_bridge_host_event(card, cmd);
1423                 return 0;
1424         default:
1425                 return 1;
1426         }
1427 }
1428
1429 struct qeth_discipline qeth_l2_discipline = {
1430         .start_poll = qeth_qdio_start_poll,
1431         .input_handler = (qdio_handler_t *) qeth_qdio_input_handler,
1432         .output_handler = (qdio_handler_t *) qeth_qdio_output_handler,
1433         .recover = qeth_l2_recover,
1434         .setup = qeth_l2_probe_device,
1435         .remove = qeth_l2_remove_device,
1436         .set_online = qeth_l2_set_online,
1437         .set_offline = qeth_l2_set_offline,
1438         .shutdown = qeth_l2_shutdown,
1439         .freeze = qeth_l2_pm_suspend,
1440         .thaw = qeth_l2_pm_resume,
1441         .restore = qeth_l2_pm_resume,
1442         .control_event_handler = qeth_l2_control_event,
1443 };
1444 EXPORT_SYMBOL_GPL(qeth_l2_discipline);
1445
1446 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1447                            struct qeth_cmd_buffer *iob)
1448 {
1449         unsigned long flags;
1450         int rc = 0;
1451
1452         QETH_CARD_TEXT(card, 5, "osndctrd");
1453
1454         wait_event(card->wait_q,
1455                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1456         qeth_prepare_control_data(card, len, iob);
1457         QETH_CARD_TEXT(card, 6, "osnoirqp");
1458         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1459         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1460                               (addr_t) iob, 0, 0);
1461         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1462         if (rc) {
1463                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1464                            "ccw_device_start rc = %i\n", rc);
1465                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1466                 qeth_release_buffer(iob->channel, iob);
1467                 atomic_set(&card->write.irq_pending, 0);
1468                 wake_up(&card->wait_q);
1469         }
1470         return rc;
1471 }
1472
1473 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1474                         struct qeth_cmd_buffer *iob, int data_len)
1475 {
1476         u16 s1, s2;
1477
1478         QETH_CARD_TEXT(card, 4, "osndipa");
1479
1480         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1481         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1482         s2 = (u16)data_len;
1483         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1484         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1485         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1486         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1487         return qeth_osn_send_control_data(card, s1, iob);
1488 }
1489
1490 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1491 {
1492         struct qeth_cmd_buffer *iob;
1493         struct qeth_card *card;
1494         int rc;
1495
1496         if (!dev)
1497                 return -ENODEV;
1498         card = dev->ml_priv;
1499         if (!card)
1500                 return -ENODEV;
1501         QETH_CARD_TEXT(card, 2, "osnsdmc");
1502         if (!qeth_card_hw_is_reachable(card))
1503                 return -ENODEV;
1504         iob = qeth_wait_for_buffer(&card->write);
1505         memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1506         rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1507         return rc;
1508 }
1509 EXPORT_SYMBOL(qeth_osn_assist);
1510
1511 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1512                   int (*assist_cb)(struct net_device *, void *),
1513                   int (*data_cb)(struct sk_buff *))
1514 {
1515         struct qeth_card *card;
1516
1517         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1518         if (*dev == NULL)
1519                 return -ENODEV;
1520         card = (*dev)->ml_priv;
1521         if (!card)
1522                 return -ENODEV;
1523         QETH_CARD_TEXT(card, 2, "osnreg");
1524         if ((assist_cb == NULL) || (data_cb == NULL))
1525                 return -EINVAL;
1526         card->osn_info.assist_cb = assist_cb;
1527         card->osn_info.data_cb = data_cb;
1528         return 0;
1529 }
1530 EXPORT_SYMBOL(qeth_osn_register);
1531
1532 void qeth_osn_deregister(struct net_device *dev)
1533 {
1534         struct qeth_card *card;
1535
1536         if (!dev)
1537                 return;
1538         card = dev->ml_priv;
1539         if (!card)
1540                 return;
1541         QETH_CARD_TEXT(card, 2, "osndereg");
1542         card->osn_info.assist_cb = NULL;
1543         card->osn_info.data_cb = NULL;
1544         return;
1545 }
1546 EXPORT_SYMBOL(qeth_osn_deregister);
1547
1548 /* SETBRIDGEPORT support, async notifications */
1549
1550 enum qeth_an_event_type {anev_reg_unreg, anev_abort, anev_reset};
1551
1552 /**
1553  * qeth_bridge_emit_host_event() - bridgeport address change notification
1554  * @card:  qeth_card structure pointer, for udev events.
1555  * @evtype:  "normal" register/unregister, or abort, or reset. For abort
1556  *            and reset token and addr_lnid are unused and may be NULL.
1557  * @code:  event bitmask: high order bit 0x80 value 1 means removal of an
1558  *                        object, 0 - addition of an object.
1559  *                        0x01 - VLAN, 0x02 - MAC, 0x03 - VLAN and MAC.
1560  * @token: "network token" structure identifying physical address of the port.
1561  * @addr_lnid: pointer to structure with MAC address and VLAN ID.
1562  *
1563  * This function is called when registrations and deregistrations are
1564  * reported by the hardware, and also when notifications are enabled -
1565  * for all currently registered addresses.
1566  */
1567 static void qeth_bridge_emit_host_event(struct qeth_card *card,
1568         enum qeth_an_event_type evtype,
1569         u8 code, struct net_if_token *token, struct mac_addr_lnid *addr_lnid)
1570 {
1571         char str[7][32];
1572         char *env[8];
1573         int i = 0;
1574
1575         switch (evtype) {
1576         case anev_reg_unreg:
1577                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=%s",
1578                                 (code & IPA_ADDR_CHANGE_CODE_REMOVAL)
1579                                 ? "deregister" : "register");
1580                 env[i] = str[i]; i++;
1581                 if (code & IPA_ADDR_CHANGE_CODE_VLANID) {
1582                         snprintf(str[i], sizeof(str[i]), "VLAN=%d",
1583                                 addr_lnid->lnid);
1584                         env[i] = str[i]; i++;
1585                 }
1586                 if (code & IPA_ADDR_CHANGE_CODE_MACADDR) {
1587                         snprintf(str[i], sizeof(str[i]), "MAC=%pM",
1588                                 addr_lnid->mac);
1589                         env[i] = str[i]; i++;
1590                 }
1591                 snprintf(str[i], sizeof(str[i]), "NTOK_BUSID=%x.%x.%04x",
1592                         token->cssid, token->ssid, token->devnum);
1593                 env[i] = str[i]; i++;
1594                 snprintf(str[i], sizeof(str[i]), "NTOK_IID=%02x", token->iid);
1595                 env[i] = str[i]; i++;
1596                 snprintf(str[i], sizeof(str[i]), "NTOK_CHPID=%02x",
1597                                 token->chpid);
1598                 env[i] = str[i]; i++;
1599                 snprintf(str[i], sizeof(str[i]), "NTOK_CHID=%04x", token->chid);
1600                 env[i] = str[i]; i++;
1601                 break;
1602         case anev_abort:
1603                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=abort");
1604                 env[i] = str[i]; i++;
1605                 break;
1606         case anev_reset:
1607                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=reset");
1608                 env[i] = str[i]; i++;
1609                 break;
1610         }
1611         env[i] = NULL;
1612         kobject_uevent_env(&card->gdev->dev.kobj, KOBJ_CHANGE, env);
1613 }
1614
1615 struct qeth_bridge_state_data {
1616         struct work_struct worker;
1617         struct qeth_card *card;
1618         struct qeth_sbp_state_change qports;
1619 };
1620
1621 static void qeth_bridge_state_change_worker(struct work_struct *work)
1622 {
1623         struct qeth_bridge_state_data *data =
1624                 container_of(work, struct qeth_bridge_state_data, worker);
1625         /* We are only interested in the first entry - local port */
1626         struct qeth_sbp_port_entry *entry = &data->qports.entry[0];
1627         char env_locrem[32];
1628         char env_role[32];
1629         char env_state[32];
1630         char *env[] = {
1631                 env_locrem,
1632                 env_role,
1633                 env_state,
1634                 NULL
1635         };
1636
1637         /* Role should not change by itself, but if it did, */
1638         /* information from the hardware is authoritative.  */
1639         mutex_lock(&data->card->conf_mutex);
1640         data->card->options.sbp.role = entry->role;
1641         mutex_unlock(&data->card->conf_mutex);
1642
1643         snprintf(env_locrem, sizeof(env_locrem), "BRIDGEPORT=statechange");
1644         snprintf(env_role, sizeof(env_role), "ROLE=%s",
1645                 (entry->role == QETH_SBP_ROLE_NONE) ? "none" :
1646                 (entry->role == QETH_SBP_ROLE_PRIMARY) ? "primary" :
1647                 (entry->role == QETH_SBP_ROLE_SECONDARY) ? "secondary" :
1648                 "<INVALID>");
1649         snprintf(env_state, sizeof(env_state), "STATE=%s",
1650                 (entry->state == QETH_SBP_STATE_INACTIVE) ? "inactive" :
1651                 (entry->state == QETH_SBP_STATE_STANDBY) ? "standby" :
1652                 (entry->state == QETH_SBP_STATE_ACTIVE) ? "active" :
1653                 "<INVALID>");
1654         kobject_uevent_env(&data->card->gdev->dev.kobj,
1655                                 KOBJ_CHANGE, env);
1656         kfree(data);
1657 }
1658
1659 static void qeth_bridge_state_change(struct qeth_card *card,
1660                                         struct qeth_ipa_cmd *cmd)
1661 {
1662         struct qeth_sbp_state_change *qports =
1663                  &cmd->data.sbp.data.state_change;
1664         struct qeth_bridge_state_data *data;
1665         int extrasize;
1666
1667         QETH_CARD_TEXT(card, 2, "brstchng");
1668         if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1669                 QETH_CARD_TEXT_(card, 2, "BPsz%04x", qports->entry_length);
1670                 return;
1671         }
1672         extrasize = sizeof(struct qeth_sbp_port_entry) * qports->num_entries;
1673         data = kzalloc(sizeof(struct qeth_bridge_state_data) + extrasize,
1674                 GFP_ATOMIC);
1675         if (!data) {
1676                 QETH_CARD_TEXT(card, 2, "BPSalloc");
1677                 return;
1678         }
1679         INIT_WORK(&data->worker, qeth_bridge_state_change_worker);
1680         data->card = card;
1681         memcpy(&data->qports, qports,
1682                         sizeof(struct qeth_sbp_state_change) + extrasize);
1683         queue_work(qeth_wq, &data->worker);
1684 }
1685
1686 struct qeth_bridge_host_data {
1687         struct work_struct worker;
1688         struct qeth_card *card;
1689         struct qeth_ipacmd_addr_change hostevs;
1690 };
1691
1692 static void qeth_bridge_host_event_worker(struct work_struct *work)
1693 {
1694         struct qeth_bridge_host_data *data =
1695                 container_of(work, struct qeth_bridge_host_data, worker);
1696         int i;
1697
1698         if (data->hostevs.lost_event_mask) {
1699                 dev_info(&data->card->gdev->dev,
1700 "Address notification from the Bridge Port stopped %s (%s)\n",
1701                         data->card->dev->name,
1702                         (data->hostevs.lost_event_mask == 0x01)
1703                         ? "Overflow"
1704                         : (data->hostevs.lost_event_mask == 0x02)
1705                         ? "Bridge port state change"
1706                         : "Unknown reason");
1707                 mutex_lock(&data->card->conf_mutex);
1708                 data->card->options.sbp.hostnotification = 0;
1709                 mutex_unlock(&data->card->conf_mutex);
1710                 qeth_bridge_emit_host_event(data->card, anev_abort,
1711                         0, NULL, NULL);
1712         } else
1713                 for (i = 0; i < data->hostevs.num_entries; i++) {
1714                         struct qeth_ipacmd_addr_change_entry *entry =
1715                                         &data->hostevs.entry[i];
1716                         qeth_bridge_emit_host_event(data->card,
1717                                         anev_reg_unreg,
1718                                         entry->change_code,
1719                                         &entry->token, &entry->addr_lnid);
1720                 }
1721         kfree(data);
1722 }
1723
1724 static void qeth_bridge_host_event(struct qeth_card *card,
1725                                         struct qeth_ipa_cmd *cmd)
1726 {
1727         struct qeth_ipacmd_addr_change *hostevs =
1728                  &cmd->data.addrchange;
1729         struct qeth_bridge_host_data *data;
1730         int extrasize;
1731
1732         QETH_CARD_TEXT(card, 2, "brhostev");
1733         if (cmd->hdr.return_code != 0x0000) {
1734                 if (cmd->hdr.return_code == 0x0010) {
1735                         if (hostevs->lost_event_mask == 0x00)
1736                                 hostevs->lost_event_mask = 0xff;
1737                 } else {
1738                         QETH_CARD_TEXT_(card, 2, "BPHe%04x",
1739                                 cmd->hdr.return_code);
1740                         return;
1741                 }
1742         }
1743         extrasize = sizeof(struct qeth_ipacmd_addr_change_entry) *
1744                                                 hostevs->num_entries;
1745         data = kzalloc(sizeof(struct qeth_bridge_host_data) + extrasize,
1746                 GFP_ATOMIC);
1747         if (!data) {
1748                 QETH_CARD_TEXT(card, 2, "BPHalloc");
1749                 return;
1750         }
1751         INIT_WORK(&data->worker, qeth_bridge_host_event_worker);
1752         data->card = card;
1753         memcpy(&data->hostevs, hostevs,
1754                         sizeof(struct qeth_ipacmd_addr_change) + extrasize);
1755         queue_work(qeth_wq, &data->worker);
1756 }
1757
1758 /* SETBRIDGEPORT support; sending commands */
1759
1760 struct _qeth_sbp_cbctl {
1761         u16 ipa_rc;
1762         u16 cmd_rc;
1763         union {
1764                 u32 supported;
1765                 struct {
1766                         enum qeth_sbp_roles *role;
1767                         enum qeth_sbp_states *state;
1768                 } qports;
1769         } data;
1770 };
1771
1772 /**
1773  * qeth_bridgeport_makerc() - derive "traditional" error from hardware codes.
1774  * @card:                     qeth_card structure pointer, for debug messages.
1775  * @cbctl:                    state structure with hardware return codes.
1776  * @setcmd:                   IPA command code
1777  *
1778  * Returns negative errno-compatible error indication or 0 on success.
1779  */
1780 static int qeth_bridgeport_makerc(struct qeth_card *card,
1781         struct _qeth_sbp_cbctl *cbctl, enum qeth_ipa_sbp_cmd setcmd)
1782 {
1783         int rc;
1784         int is_iqd = (card->info.type == QETH_CARD_TYPE_IQD);
1785
1786         if ((is_iqd && (cbctl->ipa_rc == IPA_RC_SUCCESS)) ||
1787             (!is_iqd && (cbctl->ipa_rc == cbctl->cmd_rc)))
1788                 switch (cbctl->cmd_rc) {
1789                 case 0x0000:
1790                         rc = 0;
1791                         break;
1792                 case 0x2B04:
1793                 case 0x0004:
1794                         rc = -EOPNOTSUPP;
1795                         break;
1796                 case 0x2B0C:
1797                 case 0x000C: /* Not configured as bridge Port */
1798                         rc = -ENODEV; /* maybe not the best code here? */
1799                         dev_err(&card->gdev->dev,
1800         "The device is not configured as a Bridge Port\n");
1801                         break;
1802                 case 0x2B14:
1803                 case 0x0014: /* Another device is Primary */
1804                         switch (setcmd) {
1805                         case IPA_SBP_SET_PRIMARY_BRIDGE_PORT:
1806                                 rc = -EEXIST;
1807                                 dev_err(&card->gdev->dev,
1808         "The LAN already has a primary Bridge Port\n");
1809                                 break;
1810                         case IPA_SBP_SET_SECONDARY_BRIDGE_PORT:
1811                                 rc = -EBUSY;
1812                                 dev_err(&card->gdev->dev,
1813         "The device is already a primary Bridge Port\n");
1814                                 break;
1815                         default:
1816                                 rc = -EIO;
1817                         }
1818                         break;
1819                 case 0x2B18:
1820                 case 0x0018: /* This device is currently Secondary */
1821                         rc = -EBUSY;
1822                         dev_err(&card->gdev->dev,
1823         "The device is already a secondary Bridge Port\n");
1824                         break;
1825                 case 0x2B1C:
1826                 case 0x001C: /* Limit for Secondary devices reached */
1827                         rc = -EEXIST;
1828                         dev_err(&card->gdev->dev,
1829         "The LAN cannot have more secondary Bridge Ports\n");
1830                         break;
1831                 case 0x2B24:
1832                 case 0x0024: /* This device is currently Primary */
1833                         rc = -EBUSY;
1834                         dev_err(&card->gdev->dev,
1835         "The device is already a primary Bridge Port\n");
1836                         break;
1837                 case 0x2B20:
1838                 case 0x0020: /* Not authorized by zManager */
1839                         rc = -EACCES;
1840                         dev_err(&card->gdev->dev,
1841         "The device is not authorized to be a Bridge Port\n");
1842                         break;
1843                 default:
1844                         rc = -EIO;
1845                 }
1846         else
1847                 switch (cbctl->ipa_rc) {
1848                 case IPA_RC_NOTSUPP:
1849                         rc = -EOPNOTSUPP;
1850                         break;
1851                 case IPA_RC_UNSUPPORTED_COMMAND:
1852                         rc = -EOPNOTSUPP;
1853                         break;
1854                 default:
1855                         rc = -EIO;
1856                 }
1857
1858         if (rc) {
1859                 QETH_CARD_TEXT_(card, 2, "SBPi%04x", cbctl->ipa_rc);
1860                 QETH_CARD_TEXT_(card, 2, "SBPc%04x", cbctl->cmd_rc);
1861         }
1862         return rc;
1863 }
1864
1865 static inline int ipa_cmd_sbp(struct qeth_card *card)
1866 {
1867         return (card->info.type == QETH_CARD_TYPE_IQD) ?
1868                 IPA_CMD_SETBRIDGEPORT_IQD :
1869                 IPA_CMD_SETBRIDGEPORT_OSA;
1870 }
1871
1872 static int qeth_bridgeport_query_support_cb(struct qeth_card *card,
1873         struct qeth_reply *reply, unsigned long data)
1874 {
1875         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1876         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1877         QETH_CARD_TEXT(card, 2, "brqsupcb");
1878         cbctl->ipa_rc = cmd->hdr.return_code;
1879         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1880         if ((cbctl->ipa_rc == 0) && (cbctl->cmd_rc == 0)) {
1881                 cbctl->data.supported =
1882                         cmd->data.sbp.data.query_cmds_supp.supported_cmds;
1883         } else {
1884                 cbctl->data.supported = 0;
1885         }
1886         return 0;
1887 }
1888
1889 /**
1890  * qeth_bridgeport_query_support() - store bitmask of supported subfunctions.
1891  * @card:                            qeth_card structure pointer.
1892  *
1893  * Sets bitmask of supported setbridgeport subfunctions in the qeth_card
1894  * strucutre: card->options.sbp.supported_funcs.
1895  */
1896 static void qeth_bridgeport_query_support(struct qeth_card *card)
1897 {
1898         struct qeth_cmd_buffer *iob;
1899         struct qeth_ipa_cmd *cmd;
1900         struct _qeth_sbp_cbctl cbctl;
1901
1902         QETH_CARD_TEXT(card, 2, "brqsuppo");
1903         iob = qeth_get_ipacmd_buffer(card, ipa_cmd_sbp(card), 0);
1904         if (!iob)
1905                 return;
1906         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
1907         cmd->data.sbp.hdr.cmdlength =
1908                 sizeof(struct qeth_ipacmd_sbp_hdr) +
1909                 sizeof(struct qeth_sbp_query_cmds_supp);
1910         cmd->data.sbp.hdr.command_code =
1911                 IPA_SBP_QUERY_COMMANDS_SUPPORTED;
1912         cmd->data.sbp.hdr.used_total = 1;
1913         cmd->data.sbp.hdr.seq_no = 1;
1914         if (qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_support_cb,
1915                                                         (void *)&cbctl) ||
1916             qeth_bridgeport_makerc(card, &cbctl,
1917                                         IPA_SBP_QUERY_COMMANDS_SUPPORTED)) {
1918                 /* non-zero makerc signifies failure, and produce messages */
1919                 card->options.sbp.role = QETH_SBP_ROLE_NONE;
1920                 return;
1921         }
1922         card->options.sbp.supported_funcs = cbctl.data.supported;
1923 }
1924
1925 static int qeth_bridgeport_query_ports_cb(struct qeth_card *card,
1926         struct qeth_reply *reply, unsigned long data)
1927 {
1928         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1929         struct qeth_sbp_query_ports *qports = &cmd->data.sbp.data.query_ports;
1930         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1931
1932         QETH_CARD_TEXT(card, 2, "brqprtcb");
1933         cbctl->ipa_rc = cmd->hdr.return_code;
1934         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1935         if ((cbctl->ipa_rc != 0) || (cbctl->cmd_rc != 0))
1936                 return 0;
1937         if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1938                 cbctl->cmd_rc = 0xffff;
1939                 QETH_CARD_TEXT_(card, 2, "SBPs%04x", qports->entry_length);
1940                 return 0;
1941         }
1942         /* first entry contains the state of the local port */
1943         if (qports->num_entries > 0) {
1944                 if (cbctl->data.qports.role)
1945                         *cbctl->data.qports.role = qports->entry[0].role;
1946                 if (cbctl->data.qports.state)
1947                         *cbctl->data.qports.state = qports->entry[0].state;
1948         }
1949         return 0;
1950 }
1951
1952 /**
1953  * qeth_bridgeport_query_ports() - query local bridgeport status.
1954  * @card:                          qeth_card structure pointer.
1955  * @role:   Role of the port: 0-none, 1-primary, 2-secondary.
1956  * @state:  State of the port: 0-inactive, 1-standby, 2-active.
1957  *
1958  * Returns negative errno-compatible error indication or 0 on success.
1959  *
1960  * 'role' and 'state' are not updated in case of hardware operation failure.
1961  */
1962 int qeth_bridgeport_query_ports(struct qeth_card *card,
1963         enum qeth_sbp_roles *role, enum qeth_sbp_states *state)
1964 {
1965         int rc = 0;
1966         struct qeth_cmd_buffer *iob;
1967         struct qeth_ipa_cmd *cmd;
1968         struct _qeth_sbp_cbctl cbctl = {
1969                 .data = {
1970                         .qports = {
1971                                 .role = role,
1972                                 .state = state,
1973                         },
1974                 },
1975         };
1976
1977         QETH_CARD_TEXT(card, 2, "brqports");
1978         if (!(card->options.sbp.supported_funcs & IPA_SBP_QUERY_BRIDGE_PORTS))
1979                 return -EOPNOTSUPP;
1980         iob = qeth_get_ipacmd_buffer(card, ipa_cmd_sbp(card), 0);
1981         if (!iob)
1982                 return -ENOMEM;
1983         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
1984         cmd->data.sbp.hdr.cmdlength =
1985                 sizeof(struct qeth_ipacmd_sbp_hdr);
1986         cmd->data.sbp.hdr.command_code =
1987                 IPA_SBP_QUERY_BRIDGE_PORTS;
1988         cmd->data.sbp.hdr.used_total = 1;
1989         cmd->data.sbp.hdr.seq_no = 1;
1990         rc = qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_ports_cb,
1991                                 (void *)&cbctl);
1992         if (rc < 0)
1993                 return rc;
1994         return qeth_bridgeport_makerc(card, &cbctl, IPA_SBP_QUERY_BRIDGE_PORTS);
1995 }
1996 EXPORT_SYMBOL_GPL(qeth_bridgeport_query_ports);
1997
1998 static int qeth_bridgeport_set_cb(struct qeth_card *card,
1999         struct qeth_reply *reply, unsigned long data)
2000 {
2001         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
2002         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
2003         QETH_CARD_TEXT(card, 2, "brsetrcb");
2004         cbctl->ipa_rc = cmd->hdr.return_code;
2005         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
2006         return 0;
2007 }
2008
2009 /**
2010  * qeth_bridgeport_setrole() - Assign primary role to the port.
2011  * @card:                      qeth_card structure pointer.
2012  * @role:                      Role to assign.
2013  *
2014  * Returns negative errno-compatible error indication or 0 on success.
2015  */
2016 int qeth_bridgeport_setrole(struct qeth_card *card, enum qeth_sbp_roles role)
2017 {
2018         int rc = 0;
2019         int cmdlength;
2020         struct qeth_cmd_buffer *iob;
2021         struct qeth_ipa_cmd *cmd;
2022         struct _qeth_sbp_cbctl cbctl;
2023         enum qeth_ipa_sbp_cmd setcmd;
2024
2025         QETH_CARD_TEXT(card, 2, "brsetrol");
2026         switch (role) {
2027         case QETH_SBP_ROLE_NONE:
2028                 setcmd = IPA_SBP_RESET_BRIDGE_PORT_ROLE;
2029                 cmdlength =  sizeof(struct qeth_ipacmd_sbp_hdr) +
2030                         sizeof(struct qeth_sbp_reset_role);
2031                 break;
2032         case QETH_SBP_ROLE_PRIMARY:
2033                 setcmd = IPA_SBP_SET_PRIMARY_BRIDGE_PORT;
2034                 cmdlength =  sizeof(struct qeth_ipacmd_sbp_hdr) +
2035                         sizeof(struct qeth_sbp_set_primary);
2036                 break;
2037         case QETH_SBP_ROLE_SECONDARY:
2038                 setcmd = IPA_SBP_SET_SECONDARY_BRIDGE_PORT;
2039                 cmdlength =  sizeof(struct qeth_ipacmd_sbp_hdr) +
2040                         sizeof(struct qeth_sbp_set_secondary);
2041                 break;
2042         default:
2043                 return -EINVAL;
2044         }
2045         if (!(card->options.sbp.supported_funcs & setcmd))
2046                 return -EOPNOTSUPP;
2047         iob = qeth_get_ipacmd_buffer(card, ipa_cmd_sbp(card), 0);
2048         if (!iob)
2049                 return -ENOMEM;
2050         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
2051         cmd->data.sbp.hdr.cmdlength = cmdlength;
2052         cmd->data.sbp.hdr.command_code = setcmd;
2053         cmd->data.sbp.hdr.used_total = 1;
2054         cmd->data.sbp.hdr.seq_no = 1;
2055         rc = qeth_send_ipa_cmd(card, iob, qeth_bridgeport_set_cb,
2056                                 (void *)&cbctl);
2057         if (rc < 0)
2058                 return rc;
2059         return qeth_bridgeport_makerc(card, &cbctl, setcmd);
2060 }
2061
2062 /**
2063  * qeth_anset_makerc() - derive "traditional" error from hardware codes.
2064  * @card:                     qeth_card structure pointer, for debug messages.
2065  *
2066  * Returns negative errno-compatible error indication or 0 on success.
2067  */
2068 static int qeth_anset_makerc(struct qeth_card *card, int pnso_rc, u16 response)
2069 {
2070         int rc;
2071
2072         if (pnso_rc == 0)
2073                 switch (response) {
2074                 case 0x0001:
2075                         rc = 0;
2076                         break;
2077                 case 0x0004:
2078                 case 0x0100:
2079                 case 0x0106:
2080                         rc = -EOPNOTSUPP;
2081                         dev_err(&card->gdev->dev,
2082                                 "Setting address notification failed\n");
2083                         break;
2084                 case 0x0107:
2085                         rc = -EAGAIN;
2086                         break;
2087                 default:
2088                         rc = -EIO;
2089                 }
2090         else
2091                 rc = -EIO;
2092
2093         if (rc) {
2094                 QETH_CARD_TEXT_(card, 2, "SBPp%04x", pnso_rc);
2095                 QETH_CARD_TEXT_(card, 2, "SBPr%04x", response);
2096         }
2097         return rc;
2098 }
2099
2100 static void qeth_bridgeport_an_set_cb(void *priv,
2101                 enum qdio_brinfo_entry_type type, void *entry)
2102 {
2103         struct qeth_card *card = (struct qeth_card *)priv;
2104         struct qdio_brinfo_entry_l2 *l2entry;
2105         u8 code;
2106
2107         if (type != l2_addr_lnid) {
2108                 WARN_ON_ONCE(1);
2109                 return;
2110         }
2111
2112         l2entry = (struct qdio_brinfo_entry_l2 *)entry;
2113         code = IPA_ADDR_CHANGE_CODE_MACADDR;
2114         if (l2entry->addr_lnid.lnid)
2115                 code |= IPA_ADDR_CHANGE_CODE_VLANID;
2116         qeth_bridge_emit_host_event(card, anev_reg_unreg, code,
2117                 (struct net_if_token *)&l2entry->nit,
2118                 (struct mac_addr_lnid *)&l2entry->addr_lnid);
2119 }
2120
2121 /**
2122  * qeth_bridgeport_an_set() - Enable or disable bridgeport address notification
2123  * @card:                     qeth_card structure pointer.
2124  * @enable:                   0 - disable, non-zero - enable notifications
2125  *
2126  * Returns negative errno-compatible error indication or 0 on success.
2127  *
2128  * On enable, emits a series of address notifications udev events for all
2129  * currently registered hosts.
2130  */
2131 int qeth_bridgeport_an_set(struct qeth_card *card, int enable)
2132 {
2133         int rc;
2134         u16 response;
2135         struct ccw_device *ddev;
2136         struct subchannel_id schid;
2137
2138         if (!card)
2139                 return -EINVAL;
2140         if (!card->options.sbp.supported_funcs)
2141                 return -EOPNOTSUPP;
2142         ddev = CARD_DDEV(card);
2143         ccw_device_get_schid(ddev, &schid);
2144
2145         if (enable) {
2146                 qeth_bridge_emit_host_event(card, anev_reset, 0, NULL, NULL);
2147                 rc = qdio_pnso_brinfo(schid, 1, &response,
2148                         qeth_bridgeport_an_set_cb, card);
2149         } else
2150                 rc = qdio_pnso_brinfo(schid, 0, &response, NULL, NULL);
2151         return qeth_anset_makerc(card, rc, response);
2152 }
2153 EXPORT_SYMBOL_GPL(qeth_bridgeport_an_set);
2154
2155 module_init(qeth_l2_init);
2156 module_exit(qeth_l2_exit);
2157 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
2158 MODULE_DESCRIPTION("qeth layer 2 discipline");
2159 MODULE_LICENSE("GPL");