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         int nr_frags;
 873
 874         if (card->qdio.do_prio_queueing || (cast_type &&
 875                                         card->info.is_multicast_different))
 876                 queue = card->qdio.out_qs[qeth_get_priority_queue(card, skb,
 877                                         qeth_get_ip_version(skb), cast_type)];
 878         else
 879                 queue = card->qdio.out_qs[card->qdio.default_out_queue];
 880
 881         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
 882                 card->stats.tx_carrier_errors++;
 883                 goto tx_drop;
 884         }
 885
 886         if ((card->info.type == QETH_CARD_TYPE_OSN) &&
 887             (skb->protocol == htons(ETH_P_IPV6)))
 888                 goto tx_drop;
 889
 890         if (card->options.performance_stats) {
 891                 card->perf_stats.outbound_cnt++;
 892                 card->perf_stats.outbound_start_time = qeth_get_micros();
 893         }
 894         netif_stop_queue(dev);
 895
 896         /* fix hardware limitation: as long as we do not have sbal
 897          * chaining we can not send long frag lists
 898          */
 899         if ((card->info.type != QETH_CARD_TYPE_IQD) &&
 900             !qeth_get_elements_no(card, new_skb, 0)) {
 901                 if (skb_linearize(new_skb))
 902                         goto tx_drop;
 903                 if (card->options.performance_stats)
 904                         card->perf_stats.tx_lin++;
 905         }
 906
 907         if (card->info.type == QETH_CARD_TYPE_OSN)
 908                 hdr = (struct qeth_hdr *)skb->data;
 909         else {
 910                 if (card->info.type == QETH_CARD_TYPE_IQD) {
 911                         new_skb = skb;
 912                         data_offset = ETH_HLEN;
 913                         hd_len = ETH_HLEN;
 914                         hdr = kmem_cache_alloc(qeth_core_header_cache,
 915                                                 GFP_ATOMIC);
 916                         if (!hdr)
 917                                 goto tx_drop;
 918                         elements_needed++;
 919                         skb_reset_mac_header(new_skb);
 920                         qeth_l2_fill_header(card, hdr, new_skb, cast_type);
 921                         hdr->hdr.l2.pkt_length = new_skb->len;
 922                         memcpy(((char *)hdr) + sizeof(struct qeth_hdr),
 923                                 skb_mac_header(new_skb), ETH_HLEN);
 924                 } else {
 925                         /* create a clone with writeable headroom */
 926                         new_skb = skb_realloc_headroom(skb,
 927                                                 sizeof(struct qeth_hdr));
 928                         if (!new_skb)
 929                                 goto tx_drop;
 930                         hdr = (struct qeth_hdr *)skb_push(new_skb,
 931                                                 sizeof(struct qeth_hdr));
 932                         skb_set_mac_header(new_skb, sizeof(struct qeth_hdr));
 933                         qeth_l2_fill_header(card, hdr, new_skb, cast_type);
 934                         if (new_skb->ip_summed == CHECKSUM_PARTIAL)
 935                                 qeth_l2_hdr_csum(card, hdr, new_skb);
 936                 }
 937         }
 938
 939         elements = qeth_get_elements_no(card, new_skb, elements_needed);
 940         if (!elements) {
 941                 if (data_offset >= 0)
 942                         kmem_cache_free(qeth_core_header_cache, hdr);
 943                 goto tx_drop;
 944         }
 945
 946         if (card->info.type != QETH_CARD_TYPE_IQD) {
 947                 if (qeth_hdr_chk_and_bounce(new_skb, &hdr,
 948                     sizeof(struct qeth_hdr_layer2)))
 949                         goto tx_drop;
 950                 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
 951                                          elements);
 952         } else
 953                 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
 954                                         elements, data_offset, hd_len);
 955         if (!rc) {
 956                 card->stats.tx_packets++;
 957                 card->stats.tx_bytes += tx_bytes;
 958                 if (card->options.performance_stats) {
 959                         nr_frags = skb_shinfo(new_skb)->nr_frags;
 960                         if (nr_frags) {
 961                                 card->perf_stats.sg_skbs_sent++;
 962                                 /* nr_frags + skb->data */
 963                                 card->perf_stats.sg_frags_sent += nr_frags + 1;
 964                         }
 965                 }
 966                 if (new_skb != skb)
 967                         dev_kfree_skb_any(skb);
 968                 rc = NETDEV_TX_OK;
 969         } else {
 970                 if (data_offset >= 0)
 971                         kmem_cache_free(qeth_core_header_cache, hdr);
 972
 973                 if (rc == -EBUSY) {
 974                         if (new_skb != skb)
 975                                 dev_kfree_skb_any(new_skb);
 976                         return NETDEV_TX_BUSY;
 977                 } else
 978                         goto tx_drop;
 979         }
 980
 981         netif_wake_queue(dev);
 982         if (card->options.performance_stats)
 983                 card->perf_stats.outbound_time += qeth_get_micros() -
 984                         card->perf_stats.outbound_start_time;
 985         return rc;
 986
 987 tx_drop:
 988         card->stats.tx_dropped++;
 989         card->stats.tx_errors++;
 990         if ((new_skb != skb) && new_skb)
 991                 dev_kfree_skb_any(new_skb);
 992         dev_kfree_skb_any(skb);
 993         netif_wake_queue(dev);
 994         return NETDEV_TX_OK;
 995 }
 996
 997 static int __qeth_l2_open(struct net_device *dev)
 998 {
 999         struct qeth_card *card = dev->ml_priv;
1000         int rc = 0;
1001
1002         QETH_CARD_TEXT(card, 4, "qethopen");
1003         if (card->state == CARD_STATE_UP)
1004                 return rc;
1005         if (card->state != CARD_STATE_SOFTSETUP)
1006                 return -ENODEV;
1007
1008         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
1009              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
1010                 QETH_CARD_TEXT(card, 4, "nomacadr");
1011                 return -EPERM;
1012         }
1013         card->data.state = CH_STATE_UP;
1014         card->state = CARD_STATE_UP;
1015         netif_start_queue(dev);
1016
1017         if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) {
1018                 napi_enable(&card->napi);
1019                 napi_schedule(&card->napi);
1020         } else
1021                 rc = -EIO;
1022         return rc;
1023 }
1024
1025 static int qeth_l2_open(struct net_device *dev)
1026 {
1027         struct qeth_card *card = dev->ml_priv;
1028
1029         QETH_CARD_TEXT(card, 5, "qethope_");
1030         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
1031                 QETH_CARD_TEXT(card, 3, "openREC");
1032                 return -ERESTARTSYS;
1033         }
1034         return __qeth_l2_open(dev);
1035 }
1036
1037 static int qeth_l2_stop(struct net_device *dev)
1038 {
1039         struct qeth_card *card = dev->ml_priv;
1040
1041         QETH_CARD_TEXT(card, 4, "qethstop");
1042         netif_tx_disable(dev);
1043         if (card->state == CARD_STATE_UP) {
1044                 card->state = CARD_STATE_SOFTSETUP;
1045                 napi_disable(&card->napi);
1046         }
1047         return 0;
1048 }
1049
1050 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
1051 {
1052         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1053
1054         qeth_l2_create_device_attributes(&gdev->dev);
1055         INIT_LIST_HEAD(&card->vid_list);
1056         hash_init(card->mac_htable);
1057         card->options.layer2 = 1;
1058         card->info.hwtrap = 0;
1059         return 0;
1060 }
1061
1062 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
1063 {
1064         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1065
1066         qeth_l2_remove_device_attributes(&cgdev->dev);
1067         qeth_set_allowed_threads(card, 0, 1);
1068         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1069
1070         if (cgdev->state == CCWGROUP_ONLINE)
1071                 qeth_l2_set_offline(cgdev);
1072
1073         if (card->dev) {
1074                 unregister_netdev(card->dev);
1075                 card->dev = NULL;
1076         }
1077         return;
1078 }
1079
1080 static const struct ethtool_ops qeth_l2_ethtool_ops = {
1081         .get_link = ethtool_op_get_link,
1082         .get_strings = qeth_core_get_strings,
1083         .get_ethtool_stats = qeth_core_get_ethtool_stats,
1084         .get_sset_count = qeth_core_get_sset_count,
1085         .get_drvinfo = qeth_core_get_drvinfo,
1086         .get_settings = qeth_core_ethtool_get_settings,
1087 };
1088
1089 static const struct ethtool_ops qeth_l2_osn_ops = {
1090         .get_strings = qeth_core_get_strings,
1091         .get_ethtool_stats = qeth_core_get_ethtool_stats,
1092         .get_sset_count = qeth_core_get_sset_count,
1093         .get_drvinfo = qeth_core_get_drvinfo,
1094 };
1095
1096 static const struct net_device_ops qeth_l2_netdev_ops = {
1097         .ndo_open               = qeth_l2_open,
1098         .ndo_stop               = qeth_l2_stop,
1099         .ndo_get_stats          = qeth_get_stats,
1100         .ndo_start_xmit         = qeth_l2_hard_start_xmit,
1101         .ndo_validate_addr      = eth_validate_addr,
1102         .ndo_set_rx_mode        = qeth_l2_set_rx_mode,
1103         .ndo_do_ioctl           = qeth_l2_do_ioctl,
1104         .ndo_set_mac_address    = qeth_l2_set_mac_address,
1105         .ndo_change_mtu         = qeth_change_mtu,
1106         .ndo_vlan_rx_add_vid    = qeth_l2_vlan_rx_add_vid,
1107         .ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,
1108         .ndo_tx_timeout         = qeth_tx_timeout,
1109         .ndo_fix_features       = qeth_l2_fix_features,
1110         .ndo_set_features       = qeth_l2_set_features
1111 };
1112
1113 static int qeth_l2_setup_netdev(struct qeth_card *card)
1114 {
1115         switch (card->info.type) {
1116         case QETH_CARD_TYPE_IQD:
1117                 card->dev = alloc_netdev(0, "hsi%d", NET_NAME_UNKNOWN,
1118                                          ether_setup);
1119                 break;
1120         case QETH_CARD_TYPE_OSN:
1121                 card->dev = alloc_netdev(0, "osn%d", NET_NAME_UNKNOWN,
1122                                          ether_setup);
1123                 card->dev->flags |= IFF_NOARP;
1124                 break;
1125         default:
1126                 card->dev = alloc_etherdev(0);
1127         }
1128
1129         if (!card->dev)
1130                 return -ENODEV;
1131
1132         card->dev->ml_priv = card;
1133         card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
1134         card->dev->mtu = card->info.initial_mtu;
1135         card->dev->netdev_ops = &qeth_l2_netdev_ops;
1136         card->dev->ethtool_ops =
1137                 (card->info.type != QETH_CARD_TYPE_OSN) ?
1138                 &qeth_l2_ethtool_ops : &qeth_l2_osn_ops;
1139         card->dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
1140         if (card->info.type == QETH_CARD_TYPE_OSD && !card->info.guestlan) {
1141                 card->dev->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM |
1142                                          NETIF_F_SG;
1143                 /* Turn on RX offloading and SG per default */
1144                 card->dev->features |= NETIF_F_RXCSUM | NETIF_F_SG;
1145         }
1146         card->info.broadcast_capable = 1;
1147         qeth_l2_request_initial_mac(card);
1148         card->dev->gso_max_size = (QETH_MAX_BUFFER_ELEMENTS(card) - 1) *
1149                                   PAGE_SIZE;
1150         card->dev->gso_max_segs = (QETH_MAX_BUFFER_ELEMENTS(card) - 1);
1151         SET_NETDEV_DEV(card->dev, &card->gdev->dev);
1152         netif_napi_add(card->dev, &card->napi, qeth_l2_poll, QETH_NAPI_WEIGHT);
1153         netif_carrier_off(card->dev);
1154         return register_netdev(card->dev);
1155 }
1156
1157 static int qeth_l2_start_ipassists(struct qeth_card *card)
1158 {
1159         /* configure isolation level */
1160         if (qeth_set_access_ctrl_online(card, 0))
1161                 return -ENODEV;
1162         if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
1163                 qeth_set_rx_csum(card, 1);
1164         qeth_start_ipa_tx_checksum(card);
1165         return 0;
1166 }
1167
1168 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
1169 {
1170         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1171         int rc = 0;
1172         enum qeth_card_states recover_flag;
1173
1174         mutex_lock(&card->discipline_mutex);
1175         mutex_lock(&card->conf_mutex);
1176         QETH_DBF_TEXT(SETUP, 2, "setonlin");
1177         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1178
1179         recover_flag = card->state;
1180         rc = qeth_core_hardsetup_card(card);
1181         if (rc) {
1182                 QETH_DBF_TEXT_(SETUP, 2, "2err%04x", rc);
1183                 rc = -ENODEV;
1184                 goto out_remove;
1185         }
1186         qeth_bridgeport_query_support(card);
1187         if (card->options.sbp.supported_funcs)
1188                 dev_info(&card->gdev->dev,
1189                 "The device represents a Bridge Capable Port\n");
1190         qeth_trace_features(card);
1191
1192         if (!card->dev && qeth_l2_setup_netdev(card)) {
1193                 rc = -ENODEV;
1194                 goto out_remove;
1195         }
1196
1197         if (card->info.type != QETH_CARD_TYPE_OSN)
1198                 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
1199
1200         if (qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP)) {
1201                 if (card->info.hwtrap &&
1202                     qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM))
1203                         card->info.hwtrap = 0;
1204         } else
1205                 card->info.hwtrap = 0;
1206
1207         qeth_l2_setup_bridgeport_attrs(card);
1208
1209         card->state = CARD_STATE_HARDSETUP;
1210         memset(&card->rx, 0, sizeof(struct qeth_rx));
1211         qeth_print_status_message(card);
1212
1213         /* softsetup */
1214         QETH_DBF_TEXT(SETUP, 2, "softsetp");
1215
1216         rc = qeth_send_startlan(card);
1217         if (rc) {
1218                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1219                 if (rc == 0xe080) {
1220                         dev_warn(&card->gdev->dev,
1221                                 "The LAN is offline\n");
1222                         card->lan_online = 0;
1223                         goto contin;
1224                 }
1225                 rc = -ENODEV;
1226                 goto out_remove;
1227         } else
1228                 card->lan_online = 1;
1229
1230 contin:
1231         if ((card->info.type == QETH_CARD_TYPE_OSD) ||
1232             (card->info.type == QETH_CARD_TYPE_OSX)) {
1233                 if (qeth_l2_start_ipassists(card))
1234                         goto out_remove;
1235         }
1236
1237         if (card->info.type != QETH_CARD_TYPE_OSN &&
1238             card->info.type != QETH_CARD_TYPE_OSM)
1239                 qeth_l2_process_vlans(card);
1240
1241         netif_tx_disable(card->dev);
1242
1243         rc = qeth_init_qdio_queues(card);
1244         if (rc) {
1245                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1246                 rc = -ENODEV;
1247                 goto out_remove;
1248         }
1249         card->state = CARD_STATE_SOFTSETUP;
1250         if (card->lan_online)
1251                 netif_carrier_on(card->dev);
1252         else
1253                 netif_carrier_off(card->dev);
1254
1255         qeth_set_allowed_threads(card, 0xffffffff, 0);
1256         if (recover_flag == CARD_STATE_RECOVER) {
1257                 if (recovery_mode &&
1258                     card->info.type != QETH_CARD_TYPE_OSN) {
1259                         __qeth_l2_open(card->dev);
1260                 } else {
1261                         rtnl_lock();
1262                         dev_open(card->dev);
1263                         rtnl_unlock();
1264                 }
1265                 /* this also sets saved unicast addresses */
1266                 qeth_l2_set_rx_mode(card->dev);
1267         }
1268         /* let user_space know that device is online */
1269         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1270         mutex_unlock(&card->conf_mutex);
1271         mutex_unlock(&card->discipline_mutex);
1272         return 0;
1273
1274 out_remove:
1275         qeth_l2_stop_card(card, 0);
1276         ccw_device_set_offline(CARD_DDEV(card));
1277         ccw_device_set_offline(CARD_WDEV(card));
1278         ccw_device_set_offline(CARD_RDEV(card));
1279         qdio_free(CARD_DDEV(card));
1280         if (recover_flag == CARD_STATE_RECOVER)
1281                 card->state = CARD_STATE_RECOVER;
1282         else
1283                 card->state = CARD_STATE_DOWN;
1284         mutex_unlock(&card->conf_mutex);
1285         mutex_unlock(&card->discipline_mutex);
1286         return rc;
1287 }
1288
1289 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1290 {
1291         return __qeth_l2_set_online(gdev, 0);
1292 }
1293
1294 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1295                                         int recovery_mode)
1296 {
1297         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1298         int rc = 0, rc2 = 0, rc3 = 0;
1299         enum qeth_card_states recover_flag;
1300
1301         mutex_lock(&card->discipline_mutex);
1302         mutex_lock(&card->conf_mutex);
1303         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1304         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1305
1306         if (card->dev && netif_carrier_ok(card->dev))
1307                 netif_carrier_off(card->dev);
1308         recover_flag = card->state;
1309         if ((!recovery_mode && card->info.hwtrap) || card->info.hwtrap == 2) {
1310                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1311                 card->info.hwtrap = 1;
1312         }
1313         qeth_l2_stop_card(card, recovery_mode);
1314         rc  = ccw_device_set_offline(CARD_DDEV(card));
1315         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1316         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1317         if (!rc)
1318                 rc = (rc2) ? rc2 : rc3;
1319         if (rc)
1320                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1321         qdio_free(CARD_DDEV(card));
1322         if (recover_flag == CARD_STATE_UP)
1323                 card->state = CARD_STATE_RECOVER;
1324         /* let user_space know that device is offline */
1325         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1326         mutex_unlock(&card->conf_mutex);
1327         mutex_unlock(&card->discipline_mutex);
1328         return 0;
1329 }
1330
1331 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1332 {
1333         return __qeth_l2_set_offline(cgdev, 0);
1334 }
1335
1336 static int qeth_l2_recover(void *ptr)
1337 {
1338         struct qeth_card *card;
1339         int rc = 0;
1340
1341         card = (struct qeth_card *) ptr;
1342         QETH_CARD_TEXT(card, 2, "recover1");
1343         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1344                 return 0;
1345         QETH_CARD_TEXT(card, 2, "recover2");
1346         dev_warn(&card->gdev->dev,
1347                 "A recovery process has been started for the device\n");
1348         qeth_set_recovery_task(card);
1349         __qeth_l2_set_offline(card->gdev, 1);
1350         rc = __qeth_l2_set_online(card->gdev, 1);
1351         if (!rc)
1352                 dev_info(&card->gdev->dev,
1353                         "Device successfully recovered!\n");
1354         else {
1355                 qeth_close_dev(card);
1356                 dev_warn(&card->gdev->dev, "The qeth device driver "
1357                                 "failed to recover an error on the device\n");
1358         }
1359         qeth_clear_recovery_task(card);
1360         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1361         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1362         return 0;
1363 }
1364
1365 static int __init qeth_l2_init(void)
1366 {
1367         pr_info("register layer 2 discipline\n");
1368         return 0;
1369 }
1370
1371 static void __exit qeth_l2_exit(void)
1372 {
1373         pr_info("unregister layer 2 discipline\n");
1374 }
1375
1376 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1377 {
1378         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1379         qeth_set_allowed_threads(card, 0, 1);
1380         if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
1381                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1382         qeth_qdio_clear_card(card, 0);
1383         qeth_clear_qdio_buffers(card);
1384         qdio_free(CARD_DDEV(card));
1385 }
1386
1387 static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev)
1388 {
1389         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1390
1391         if (card->dev)
1392                 netif_device_detach(card->dev);
1393         qeth_set_allowed_threads(card, 0, 1);
1394         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1395         if (gdev->state == CCWGROUP_OFFLINE)
1396                 return 0;
1397         if (card->state == CARD_STATE_UP) {
1398                 if (card->info.hwtrap)
1399                         qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1400                 __qeth_l2_set_offline(card->gdev, 1);
1401         } else
1402                 __qeth_l2_set_offline(card->gdev, 0);
1403         return 0;
1404 }
1405
1406 static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
1407 {
1408         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1409         int rc = 0;
1410
1411         if (gdev->state == CCWGROUP_OFFLINE)
1412                 goto out;
1413
1414         if (card->state == CARD_STATE_RECOVER) {
1415                 rc = __qeth_l2_set_online(card->gdev, 1);
1416                 if (rc) {
1417                         rtnl_lock();
1418                         dev_close(card->dev);
1419                         rtnl_unlock();
1420                 }
1421         } else
1422                 rc = __qeth_l2_set_online(card->gdev, 0);
1423 out:
1424         qeth_set_allowed_threads(card, 0xffffffff, 0);
1425         if (card->dev)
1426                 netif_device_attach(card->dev);
1427         if (rc)
1428                 dev_warn(&card->gdev->dev, "The qeth device driver "
1429                         "failed to recover an error on the device\n");
1430         return rc;
1431 }
1432
1433 /* Returns zero if the command is successfully "consumed" */
1434 static int qeth_l2_control_event(struct qeth_card *card,
1435                                         struct qeth_ipa_cmd *cmd)
1436 {
1437         switch (cmd->hdr.command) {
1438         case IPA_CMD_SETBRIDGEPORT_OSA:
1439         case IPA_CMD_SETBRIDGEPORT_IQD:
1440                 if (cmd->data.sbp.hdr.command_code ==
1441                                 IPA_SBP_BRIDGE_PORT_STATE_CHANGE) {
1442                         qeth_bridge_state_change(card, cmd);
1443                         return 0;
1444                 } else
1445                         return 1;
1446         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
1447                 qeth_bridge_host_event(card, cmd);
1448                 return 0;
1449         default:
1450                 return 1;
1451         }
1452 }
1453
1454 struct qeth_discipline qeth_l2_discipline = {
1455         .start_poll = qeth_qdio_start_poll,
1456         .input_handler = (qdio_handler_t *) qeth_qdio_input_handler,
1457         .output_handler = (qdio_handler_t *) qeth_qdio_output_handler,
1458         .recover = qeth_l2_recover,
1459         .setup = qeth_l2_probe_device,
1460         .remove = qeth_l2_remove_device,
1461         .set_online = qeth_l2_set_online,
1462         .set_offline = qeth_l2_set_offline,
1463         .shutdown = qeth_l2_shutdown,
1464         .freeze = qeth_l2_pm_suspend,
1465         .thaw = qeth_l2_pm_resume,
1466         .restore = qeth_l2_pm_resume,
1467         .control_event_handler = qeth_l2_control_event,
1468 };
1469 EXPORT_SYMBOL_GPL(qeth_l2_discipline);
1470
1471 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1472                            struct qeth_cmd_buffer *iob)
1473 {
1474         unsigned long flags;
1475         int rc = 0;
1476
1477         QETH_CARD_TEXT(card, 5, "osndctrd");
1478
1479         wait_event(card->wait_q,
1480                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1481         qeth_prepare_control_data(card, len, iob);
1482         QETH_CARD_TEXT(card, 6, "osnoirqp");
1483         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1484         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1485                               (addr_t) iob, 0, 0);
1486         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1487         if (rc) {
1488                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1489                            "ccw_device_start rc = %i\n", rc);
1490                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1491                 qeth_release_buffer(iob->channel, iob);
1492                 atomic_set(&card->write.irq_pending, 0);
1493                 wake_up(&card->wait_q);
1494         }
1495         return rc;
1496 }
1497
1498 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1499                         struct qeth_cmd_buffer *iob, int data_len)
1500 {
1501         u16 s1, s2;
1502
1503         QETH_CARD_TEXT(card, 4, "osndipa");
1504
1505         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1506         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1507         s2 = (u16)data_len;
1508         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1509         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1510         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1511         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1512         return qeth_osn_send_control_data(card, s1, iob);
1513 }
1514
1515 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1516 {
1517         struct qeth_cmd_buffer *iob;
1518         struct qeth_card *card;
1519         int rc;
1520
1521         if (!dev)
1522                 return -ENODEV;
1523         card = dev->ml_priv;
1524         if (!card)
1525                 return -ENODEV;
1526         QETH_CARD_TEXT(card, 2, "osnsdmc");
1527         if (!qeth_card_hw_is_reachable(card))
1528                 return -ENODEV;
1529         iob = qeth_wait_for_buffer(&card->write);
1530         memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1531         rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1532         return rc;
1533 }
1534 EXPORT_SYMBOL(qeth_osn_assist);
1535
1536 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1537                   int (*assist_cb)(struct net_device *, void *),
1538                   int (*data_cb)(struct sk_buff *))
1539 {
1540         struct qeth_card *card;
1541
1542         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1543         if (*dev == NULL)
1544                 return -ENODEV;
1545         card = (*dev)->ml_priv;
1546         if (!card)
1547                 return -ENODEV;
1548         QETH_CARD_TEXT(card, 2, "osnreg");
1549         if ((assist_cb == NULL) || (data_cb == NULL))
1550                 return -EINVAL;
1551         card->osn_info.assist_cb = assist_cb;
1552         card->osn_info.data_cb = data_cb;
1553         return 0;
1554 }
1555 EXPORT_SYMBOL(qeth_osn_register);
1556
1557 void qeth_osn_deregister(struct net_device *dev)
1558 {
1559         struct qeth_card *card;
1560
1561         if (!dev)
1562                 return;
1563         card = dev->ml_priv;
1564         if (!card)
1565                 return;
1566         QETH_CARD_TEXT(card, 2, "osndereg");
1567         card->osn_info.assist_cb = NULL;
1568         card->osn_info.data_cb = NULL;
1569         return;
1570 }
1571 EXPORT_SYMBOL(qeth_osn_deregister);
1572
1573 /* SETBRIDGEPORT support, async notifications */
1574
1575 enum qeth_an_event_type {anev_reg_unreg, anev_abort, anev_reset};
1576
1577 /**
1578  * qeth_bridge_emit_host_event() - bridgeport address change notification
1579  * @card:  qeth_card structure pointer, for udev events.
1580  * @evtype:  "normal" register/unregister, or abort, or reset. For abort
1581  *            and reset token and addr_lnid are unused and may be NULL.
1582  * @code:  event bitmask: high order bit 0x80 value 1 means removal of an
1583  *                        object, 0 - addition of an object.
1584  *                        0x01 - VLAN, 0x02 - MAC, 0x03 - VLAN and MAC.
1585  * @token: "network token" structure identifying physical address of the port.
1586  * @addr_lnid: pointer to structure with MAC address and VLAN ID.
1587  *
1588  * This function is called when registrations and deregistrations are
1589  * reported by the hardware, and also when notifications are enabled -
1590  * for all currently registered addresses.
1591  */
1592 static void qeth_bridge_emit_host_event(struct qeth_card *card,
1593         enum qeth_an_event_type evtype,
1594         u8 code, struct net_if_token *token, struct mac_addr_lnid *addr_lnid)
1595 {
1596         char str[7][32];
1597         char *env[8];
1598         int i = 0;
1599
1600         switch (evtype) {
1601         case anev_reg_unreg:
1602                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=%s",
1603                                 (code & IPA_ADDR_CHANGE_CODE_REMOVAL)
1604                                 ? "deregister" : "register");
1605                 env[i] = str[i]; i++;
1606                 if (code & IPA_ADDR_CHANGE_CODE_VLANID) {
1607                         snprintf(str[i], sizeof(str[i]), "VLAN=%d",
1608                                 addr_lnid->lnid);
1609                         env[i] = str[i]; i++;
1610                 }
1611                 if (code & IPA_ADDR_CHANGE_CODE_MACADDR) {
1612                         snprintf(str[i], sizeof(str[i]), "MAC=%pM",
1613                                 addr_lnid->mac);
1614                         env[i] = str[i]; i++;
1615                 }
1616                 snprintf(str[i], sizeof(str[i]), "NTOK_BUSID=%x.%x.%04x",
1617                         token->cssid, token->ssid, token->devnum);
1618                 env[i] = str[i]; i++;
1619                 snprintf(str[i], sizeof(str[i]), "NTOK_IID=%02x", token->iid);
1620                 env[i] = str[i]; i++;
1621                 snprintf(str[i], sizeof(str[i]), "NTOK_CHPID=%02x",
1622                                 token->chpid);
1623                 env[i] = str[i]; i++;
1624                 snprintf(str[i], sizeof(str[i]), "NTOK_CHID=%04x", token->chid);
1625                 env[i] = str[i]; i++;
1626                 break;
1627         case anev_abort:
1628                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=abort");
1629                 env[i] = str[i]; i++;
1630                 break;
1631         case anev_reset:
1632                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=reset");
1633                 env[i] = str[i]; i++;
1634                 break;
1635         }
1636         env[i] = NULL;
1637         kobject_uevent_env(&card->gdev->dev.kobj, KOBJ_CHANGE, env);
1638 }
1639
1640 struct qeth_bridge_state_data {
1641         struct work_struct worker;
1642         struct qeth_card *card;
1643         struct qeth_sbp_state_change qports;
1644 };
1645
1646 static void qeth_bridge_state_change_worker(struct work_struct *work)
1647 {
1648         struct qeth_bridge_state_data *data =
1649                 container_of(work, struct qeth_bridge_state_data, worker);
1650         /* We are only interested in the first entry - local port */
1651         struct qeth_sbp_port_entry *entry = &data->qports.entry[0];
1652         char env_locrem[32];
1653         char env_role[32];
1654         char env_state[32];
1655         char *env[] = {
1656                 env_locrem,
1657                 env_role,
1658                 env_state,
1659                 NULL
1660         };
1661
1662         /* Role should not change by itself, but if it did, */
1663         /* information from the hardware is authoritative.  */
1664         mutex_lock(&data->card->conf_mutex);
1665         data->card->options.sbp.role = entry->role;
1666         mutex_unlock(&data->card->conf_mutex);
1667
1668         snprintf(env_locrem, sizeof(env_locrem), "BRIDGEPORT=statechange");
1669         snprintf(env_role, sizeof(env_role), "ROLE=%s",
1670                 (entry->role == QETH_SBP_ROLE_NONE) ? "none" :
1671                 (entry->role == QETH_SBP_ROLE_PRIMARY) ? "primary" :
1672                 (entry->role == QETH_SBP_ROLE_SECONDARY) ? "secondary" :
1673                 "<INVALID>");
1674         snprintf(env_state, sizeof(env_state), "STATE=%s",
1675                 (entry->state == QETH_SBP_STATE_INACTIVE) ? "inactive" :
1676                 (entry->state == QETH_SBP_STATE_STANDBY) ? "standby" :
1677                 (entry->state == QETH_SBP_STATE_ACTIVE) ? "active" :
1678                 "<INVALID>");
1679         kobject_uevent_env(&data->card->gdev->dev.kobj,
1680                                 KOBJ_CHANGE, env);
1681         kfree(data);
1682 }
1683
1684 static void qeth_bridge_state_change(struct qeth_card *card,
1685                                         struct qeth_ipa_cmd *cmd)
1686 {
1687         struct qeth_sbp_state_change *qports =
1688                  &cmd->data.sbp.data.state_change;
1689         struct qeth_bridge_state_data *data;
1690         int extrasize;
1691
1692         QETH_CARD_TEXT(card, 2, "brstchng");
1693         if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1694                 QETH_CARD_TEXT_(card, 2, "BPsz%04x", qports->entry_length);
1695                 return;
1696         }
1697         extrasize = sizeof(struct qeth_sbp_port_entry) * qports->num_entries;
1698         data = kzalloc(sizeof(struct qeth_bridge_state_data) + extrasize,
1699                 GFP_ATOMIC);
1700         if (!data) {
1701                 QETH_CARD_TEXT(card, 2, "BPSalloc");
1702                 return;
1703         }
1704         INIT_WORK(&data->worker, qeth_bridge_state_change_worker);
1705         data->card = card;
1706         memcpy(&data->qports, qports,
1707                         sizeof(struct qeth_sbp_state_change) + extrasize);
1708         queue_work(qeth_wq, &data->worker);
1709 }
1710
1711 struct qeth_bridge_host_data {
1712         struct work_struct worker;
1713         struct qeth_card *card;
1714         struct qeth_ipacmd_addr_change hostevs;
1715 };
1716
1717 static void qeth_bridge_host_event_worker(struct work_struct *work)
1718 {
1719         struct qeth_bridge_host_data *data =
1720                 container_of(work, struct qeth_bridge_host_data, worker);
1721         int i;
1722
1723         if (data->hostevs.lost_event_mask) {
1724                 dev_info(&data->card->gdev->dev,
1725 "Address notification from the Bridge Port stopped %s (%s)\n",
1726                         data->card->dev->name,
1727                         (data->hostevs.lost_event_mask == 0x01)
1728                         ? "Overflow"
1729                         : (data->hostevs.lost_event_mask == 0x02)
1730                         ? "Bridge port state change"
1731                         : "Unknown reason");
1732                 mutex_lock(&data->card->conf_mutex);
1733                 data->card->options.sbp.hostnotification = 0;
1734                 mutex_unlock(&data->card->conf_mutex);
1735                 qeth_bridge_emit_host_event(data->card, anev_abort,
1736                         0, NULL, NULL);
1737         } else
1738                 for (i = 0; i < data->hostevs.num_entries; i++) {
1739                         struct qeth_ipacmd_addr_change_entry *entry =
1740                                         &data->hostevs.entry[i];
1741                         qeth_bridge_emit_host_event(data->card,
1742                                         anev_reg_unreg,
1743                                         entry->change_code,
1744                                         &entry->token, &entry->addr_lnid);
1745                 }
1746         kfree(data);
1747 }
1748
1749 static void qeth_bridge_host_event(struct qeth_card *card,
1750                                         struct qeth_ipa_cmd *cmd)
1751 {
1752         struct qeth_ipacmd_addr_change *hostevs =
1753                  &cmd->data.addrchange;
1754         struct qeth_bridge_host_data *data;
1755         int extrasize;
1756
1757         QETH_CARD_TEXT(card, 2, "brhostev");
1758         if (cmd->hdr.return_code != 0x0000) {
1759                 if (cmd->hdr.return_code == 0x0010) {
1760                         if (hostevs->lost_event_mask == 0x00)
1761                                 hostevs->lost_event_mask = 0xff;
1762                 } else {
1763                         QETH_CARD_TEXT_(card, 2, "BPHe%04x",
1764                                 cmd->hdr.return_code);
1765                         return;
1766                 }
1767         }
1768         extrasize = sizeof(struct qeth_ipacmd_addr_change_entry) *
1769                                                 hostevs->num_entries;
1770         data = kzalloc(sizeof(struct qeth_bridge_host_data) + extrasize,
1771                 GFP_ATOMIC);
1772         if (!data) {
1773                 QETH_CARD_TEXT(card, 2, "BPHalloc");
1774                 return;
1775         }
1776         INIT_WORK(&data->worker, qeth_bridge_host_event_worker);
1777         data->card = card;
1778         memcpy(&data->hostevs, hostevs,
1779                         sizeof(struct qeth_ipacmd_addr_change) + extrasize);
1780         queue_work(qeth_wq, &data->worker);
1781 }
1782
1783 /* SETBRIDGEPORT support; sending commands */
1784
1785 struct _qeth_sbp_cbctl {
1786         u16 ipa_rc;
1787         u16 cmd_rc;
1788         union {
1789                 u32 supported;
1790                 struct {
1791                         enum qeth_sbp_roles *role;
1792                         enum qeth_sbp_states *state;
1793                 } qports;
1794         } data;
1795 };
1796
1797 /**
1798  * qeth_bridgeport_makerc() - derive "traditional" error from hardware codes.
1799  * @card:                     qeth_card structure pointer, for debug messages.
1800  * @cbctl:                    state structure with hardware return codes.
1801  * @setcmd:                   IPA command code
1802  *
1803  * Returns negative errno-compatible error indication or 0 on success.
1804  */
1805 static int qeth_bridgeport_makerc(struct qeth_card *card,
1806         struct _qeth_sbp_cbctl *cbctl, enum qeth_ipa_sbp_cmd setcmd)
1807 {
1808         int rc;
1809         int is_iqd = (card->info.type == QETH_CARD_TYPE_IQD);
1810
1811         if ((is_iqd && (cbctl->ipa_rc == IPA_RC_SUCCESS)) ||
1812             (!is_iqd && (cbctl->ipa_rc == cbctl->cmd_rc)))
1813                 switch (cbctl->cmd_rc) {
1814                 case 0x0000:
1815                         rc = 0;
1816                         break;
1817                 case 0x2B04:
1818                 case 0x0004:
1819                         rc = -EOPNOTSUPP;
1820                         break;
1821                 case 0x2B0C:
1822                 case 0x000C: /* Not configured as bridge Port */
1823                         rc = -ENODEV; /* maybe not the best code here? */
1824                         dev_err(&card->gdev->dev,
1825         "The device is not configured as a Bridge Port\n");
1826                         break;
1827                 case 0x2B10:
1828                 case 0x0010: /* OS mismatch */
1829                         rc = -EPERM;
1830                         dev_err(&card->gdev->dev,
1831         "A Bridge Port is already configured by a different operating system\n");
1832                         break;
1833                 case 0x2B14:
1834                 case 0x0014: /* Another device is Primary */
1835                         switch (setcmd) {
1836                         case IPA_SBP_SET_PRIMARY_BRIDGE_PORT:
1837                                 rc = -EEXIST;
1838                                 dev_err(&card->gdev->dev,
1839         "The LAN already has a primary Bridge Port\n");
1840                                 break;
1841                         case IPA_SBP_SET_SECONDARY_BRIDGE_PORT:
1842                                 rc = -EBUSY;
1843                                 dev_err(&card->gdev->dev,
1844         "The device is already a primary Bridge Port\n");
1845                                 break;
1846                         default:
1847                                 rc = -EIO;
1848                         }
1849                         break;
1850                 case 0x2B18:
1851                 case 0x0018: /* This device is currently Secondary */
1852                         rc = -EBUSY;
1853                         dev_err(&card->gdev->dev,
1854         "The device is already a secondary Bridge Port\n");
1855                         break;
1856                 case 0x2B1C:
1857                 case 0x001C: /* Limit for Secondary devices reached */
1858                         rc = -EEXIST;
1859                         dev_err(&card->gdev->dev,
1860         "The LAN cannot have more secondary Bridge Ports\n");
1861                         break;
1862                 case 0x2B24:
1863                 case 0x0024: /* This device is currently Primary */
1864                         rc = -EBUSY;
1865                         dev_err(&card->gdev->dev,
1866         "The device is already a primary Bridge Port\n");
1867                         break;
1868                 case 0x2B20:
1869                 case 0x0020: /* Not authorized by zManager */
1870                         rc = -EACCES;
1871                         dev_err(&card->gdev->dev,
1872         "The device is not authorized to be a Bridge Port\n");
1873                         break;
1874                 default:
1875                         rc = -EIO;
1876                 }
1877         else
1878                 switch (cbctl->ipa_rc) {
1879                 case IPA_RC_NOTSUPP:
1880                         rc = -EOPNOTSUPP;
1881                         break;
1882                 case IPA_RC_UNSUPPORTED_COMMAND:
1883                         rc = -EOPNOTSUPP;
1884                         break;
1885                 default:
1886                         rc = -EIO;
1887                 }
1888
1889         if (rc) {
1890                 QETH_CARD_TEXT_(card, 2, "SBPi%04x", cbctl->ipa_rc);
1891                 QETH_CARD_TEXT_(card, 2, "SBPc%04x", cbctl->cmd_rc);
1892         }
1893         return rc;
1894 }
1895
1896 static inline int ipa_cmd_sbp(struct qeth_card *card)
1897 {
1898         return (card->info.type == QETH_CARD_TYPE_IQD) ?
1899                 IPA_CMD_SETBRIDGEPORT_IQD :
1900                 IPA_CMD_SETBRIDGEPORT_OSA;
1901 }
1902
1903 static int qeth_bridgeport_query_support_cb(struct qeth_card *card,
1904         struct qeth_reply *reply, unsigned long data)
1905 {
1906         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1907         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1908         QETH_CARD_TEXT(card, 2, "brqsupcb");
1909         cbctl->ipa_rc = cmd->hdr.return_code;
1910         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1911         if ((cbctl->ipa_rc == 0) && (cbctl->cmd_rc == 0)) {
1912                 cbctl->data.supported =
1913                         cmd->data.sbp.data.query_cmds_supp.supported_cmds;
1914         } else {
1915                 cbctl->data.supported = 0;
1916         }
1917         return 0;
1918 }
1919
1920 /**
1921  * qeth_bridgeport_query_support() - store bitmask of supported subfunctions.
1922  * @card:                            qeth_card structure pointer.
1923  *
1924  * Sets bitmask of supported setbridgeport subfunctions in the qeth_card
1925  * strucutre: card->options.sbp.supported_funcs.
1926  */
1927 static void qeth_bridgeport_query_support(struct qeth_card *card)
1928 {
1929         struct qeth_cmd_buffer *iob;
1930         struct qeth_ipa_cmd *cmd;
1931         struct _qeth_sbp_cbctl cbctl;
1932
1933         QETH_CARD_TEXT(card, 2, "brqsuppo");
1934         iob = qeth_get_ipacmd_buffer(card, ipa_cmd_sbp(card), 0);
1935         if (!iob)
1936                 return;
1937         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
1938         cmd->data.sbp.hdr.cmdlength =
1939                 sizeof(struct qeth_ipacmd_sbp_hdr) +
1940                 sizeof(struct qeth_sbp_query_cmds_supp);
1941         cmd->data.sbp.hdr.command_code =
1942                 IPA_SBP_QUERY_COMMANDS_SUPPORTED;
1943         cmd->data.sbp.hdr.used_total = 1;
1944         cmd->data.sbp.hdr.seq_no = 1;
1945         if (qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_support_cb,
1946                                                         (void *)&cbctl) ||
1947             qeth_bridgeport_makerc(card, &cbctl,
1948                                         IPA_SBP_QUERY_COMMANDS_SUPPORTED)) {
1949                 /* non-zero makerc signifies failure, and produce messages */
1950                 card->options.sbp.role = QETH_SBP_ROLE_NONE;
1951                 return;
1952         }
1953         card->options.sbp.supported_funcs = cbctl.data.supported;
1954 }
1955
1956 static int qeth_bridgeport_query_ports_cb(struct qeth_card *card,
1957         struct qeth_reply *reply, unsigned long data)
1958 {
1959         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1960         struct qeth_sbp_query_ports *qports = &cmd->data.sbp.data.query_ports;
1961         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1962
1963         QETH_CARD_TEXT(card, 2, "brqprtcb");
1964         cbctl->ipa_rc = cmd->hdr.return_code;
1965         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1966         if ((cbctl->ipa_rc != 0) || (cbctl->cmd_rc != 0))
1967                 return 0;
1968         if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1969                 cbctl->cmd_rc = 0xffff;
1970                 QETH_CARD_TEXT_(card, 2, "SBPs%04x", qports->entry_length);
1971                 return 0;
1972         }
1973         /* first entry contains the state of the local port */
1974         if (qports->num_entries > 0) {
1975                 if (cbctl->data.qports.role)
1976                         *cbctl->data.qports.role = qports->entry[0].role;
1977                 if (cbctl->data.qports.state)
1978                         *cbctl->data.qports.state = qports->entry[0].state;
1979         }
1980         return 0;
1981 }
1982
1983 /**
1984  * qeth_bridgeport_query_ports() - query local bridgeport status.
1985  * @card:                          qeth_card structure pointer.
1986  * @role:   Role of the port: 0-none, 1-primary, 2-secondary.
1987  * @state:  State of the port: 0-inactive, 1-standby, 2-active.
1988  *
1989  * Returns negative errno-compatible error indication or 0 on success.
1990  *
1991  * 'role' and 'state' are not updated in case of hardware operation failure.
1992  */
1993 int qeth_bridgeport_query_ports(struct qeth_card *card,
1994         enum qeth_sbp_roles *role, enum qeth_sbp_states *state)
1995 {
1996         int rc = 0;
1997         struct qeth_cmd_buffer *iob;
1998         struct qeth_ipa_cmd *cmd;
1999         struct _qeth_sbp_cbctl cbctl = {
2000                 .data = {
2001                         .qports = {
2002                                 .role = role,
2003                                 .state = state,
2004                         },
2005                 },
2006         };
2007
2008         QETH_CARD_TEXT(card, 2, "brqports");
2009         if (!(card->options.sbp.supported_funcs & IPA_SBP_QUERY_BRIDGE_PORTS))
2010                 return -EOPNOTSUPP;
2011         iob = qeth_get_ipacmd_buffer(card, ipa_cmd_sbp(card), 0);
2012         if (!iob)
2013                 return -ENOMEM;
2014         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
2015         cmd->data.sbp.hdr.cmdlength =
2016                 sizeof(struct qeth_ipacmd_sbp_hdr);
2017         cmd->data.sbp.hdr.command_code =
2018                 IPA_SBP_QUERY_BRIDGE_PORTS;
2019         cmd->data.sbp.hdr.used_total = 1;
2020         cmd->data.sbp.hdr.seq_no = 1;
2021         rc = qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_ports_cb,
2022                                 (void *)&cbctl);
2023         if (rc < 0)
2024                 return rc;
2025         return qeth_bridgeport_makerc(card, &cbctl, IPA_SBP_QUERY_BRIDGE_PORTS);
2026 }
2027 EXPORT_SYMBOL_GPL(qeth_bridgeport_query_ports);
2028
2029 static int qeth_bridgeport_set_cb(struct qeth_card *card,
2030         struct qeth_reply *reply, unsigned long data)
2031 {
2032         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
2033         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
2034         QETH_CARD_TEXT(card, 2, "brsetrcb");
2035         cbctl->ipa_rc = cmd->hdr.return_code;
2036         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
2037         return 0;
2038 }
2039
2040 /**
2041  * qeth_bridgeport_setrole() - Assign primary role to the port.
2042  * @card:                      qeth_card structure pointer.
2043  * @role:                      Role to assign.
2044  *
2045  * Returns negative errno-compatible error indication or 0 on success.
2046  */
2047 int qeth_bridgeport_setrole(struct qeth_card *card, enum qeth_sbp_roles role)
2048 {
2049         int rc = 0;
2050         int cmdlength;
2051         struct qeth_cmd_buffer *iob;
2052         struct qeth_ipa_cmd *cmd;
2053         struct _qeth_sbp_cbctl cbctl;
2054         enum qeth_ipa_sbp_cmd setcmd;
2055
2056         QETH_CARD_TEXT(card, 2, "brsetrol");
2057         switch (role) {
2058         case QETH_SBP_ROLE_NONE:
2059                 setcmd = IPA_SBP_RESET_BRIDGE_PORT_ROLE;
2060                 cmdlength =  sizeof(struct qeth_ipacmd_sbp_hdr) +
2061                         sizeof(struct qeth_sbp_reset_role);
2062                 break;
2063         case QETH_SBP_ROLE_PRIMARY:
2064                 setcmd = IPA_SBP_SET_PRIMARY_BRIDGE_PORT;
2065                 cmdlength =  sizeof(struct qeth_ipacmd_sbp_hdr) +
2066                         sizeof(struct qeth_sbp_set_primary);
2067                 break;
2068         case QETH_SBP_ROLE_SECONDARY:
2069                 setcmd = IPA_SBP_SET_SECONDARY_BRIDGE_PORT;
2070                 cmdlength =  sizeof(struct qeth_ipacmd_sbp_hdr) +
2071                         sizeof(struct qeth_sbp_set_secondary);
2072                 break;
2073         default:
2074                 return -EINVAL;
2075         }
2076         if (!(card->options.sbp.supported_funcs & setcmd))
2077                 return -EOPNOTSUPP;
2078         iob = qeth_get_ipacmd_buffer(card, ipa_cmd_sbp(card), 0);
2079         if (!iob)
2080                 return -ENOMEM;
2081         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
2082         cmd->data.sbp.hdr.cmdlength = cmdlength;
2083         cmd->data.sbp.hdr.command_code = setcmd;
2084         cmd->data.sbp.hdr.used_total = 1;
2085         cmd->data.sbp.hdr.seq_no = 1;
2086         rc = qeth_send_ipa_cmd(card, iob, qeth_bridgeport_set_cb,
2087                                 (void *)&cbctl);
2088         if (rc < 0)
2089                 return rc;
2090         return qeth_bridgeport_makerc(card, &cbctl, setcmd);
2091 }
2092
2093 /**
2094  * qeth_anset_makerc() - derive "traditional" error from hardware codes.
2095  * @card:                     qeth_card structure pointer, for debug messages.
2096  *
2097  * Returns negative errno-compatible error indication or 0 on success.
2098  */
2099 static int qeth_anset_makerc(struct qeth_card *card, int pnso_rc, u16 response)
2100 {
2101         int rc;
2102
2103         if (pnso_rc == 0)
2104                 switch (response) {
2105                 case 0x0001:
2106                         rc = 0;
2107                         break;
2108                 case 0x0004:
2109                 case 0x0100:
2110                 case 0x0106:
2111                         rc = -EOPNOTSUPP;
2112                         dev_err(&card->gdev->dev,
2113                                 "Setting address notification failed\n");
2114                         break;
2115                 case 0x0107:
2116                         rc = -EAGAIN;
2117                         break;
2118                 default:
2119                         rc = -EIO;
2120                 }
2121         else
2122                 rc = -EIO;
2123
2124         if (rc) {
2125                 QETH_CARD_TEXT_(card, 2, "SBPp%04x", pnso_rc);
2126                 QETH_CARD_TEXT_(card, 2, "SBPr%04x", response);
2127         }
2128         return rc;
2129 }
2130
2131 static void qeth_bridgeport_an_set_cb(void *priv,
2132                 enum qdio_brinfo_entry_type type, void *entry)
2133 {
2134         struct qeth_card *card = (struct qeth_card *)priv;
2135         struct qdio_brinfo_entry_l2 *l2entry;
2136         u8 code;
2137
2138         if (type != l2_addr_lnid) {
2139                 WARN_ON_ONCE(1);
2140                 return;
2141         }
2142
2143         l2entry = (struct qdio_brinfo_entry_l2 *)entry;
2144         code = IPA_ADDR_CHANGE_CODE_MACADDR;
2145         if (l2entry->addr_lnid.lnid)
2146                 code |= IPA_ADDR_CHANGE_CODE_VLANID;
2147         qeth_bridge_emit_host_event(card, anev_reg_unreg, code,
2148                 (struct net_if_token *)&l2entry->nit,
2149                 (struct mac_addr_lnid *)&l2entry->addr_lnid);
2150 }
2151
2152 /**
2153  * qeth_bridgeport_an_set() - Enable or disable bridgeport address notification
2154  * @card:                     qeth_card structure pointer.
2155  * @enable:                   0 - disable, non-zero - enable notifications
2156  *
2157  * Returns negative errno-compatible error indication or 0 on success.
2158  *
2159  * On enable, emits a series of address notifications udev events for all
2160  * currently registered hosts.
2161  */
2162 int qeth_bridgeport_an_set(struct qeth_card *card, int enable)
2163 {
2164         int rc;
2165         u16 response;
2166         struct ccw_device *ddev;
2167         struct subchannel_id schid;
2168
2169         if (!card)
2170                 return -EINVAL;
2171         if (!card->options.sbp.supported_funcs)
2172                 return -EOPNOTSUPP;
2173         ddev = CARD_DDEV(card);
2174         ccw_device_get_schid(ddev, &schid);
2175
2176         if (enable) {
2177                 qeth_bridge_emit_host_event(card, anev_reset, 0, NULL, NULL);
2178                 rc = qdio_pnso_brinfo(schid, 1, &response,
2179                         qeth_bridgeport_an_set_cb, card);
2180         } else
2181                 rc = qdio_pnso_brinfo(schid, 0, &response, NULL, NULL);
2182         return qeth_anset_makerc(card, rc, response);
2183 }
2184 EXPORT_SYMBOL_GPL(qeth_bridgeport_an_set);
2185
2186 module_init(qeth_l2_init);
2187 module_exit(qeth_l2_exit);
2188 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
2189 MODULE_DESCRIPTION("qeth layer 2 discipline");
2190 MODULE_LICENSE("GPL");