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                 int lin_rc = skb_linearize(new_skb);
 902
 903                 if (card->options.performance_stats) {
 904                         if (lin_rc)
 905                                 card->perf_stats.tx_linfail++;
 906                         else
 907                                 card->perf_stats.tx_lin++;
 908                 }
 909                 if (lin_rc)
 910                         goto tx_drop;
 911         }
 912
 913         if (card->info.type == QETH_CARD_TYPE_OSN)
 914                 hdr = (struct qeth_hdr *)skb->data;
 915         else {
 916                 if (card->info.type == QETH_CARD_TYPE_IQD) {
 917                         new_skb = skb;
 918                         data_offset = ETH_HLEN;
 919                         hd_len = ETH_HLEN;
 920                         hdr = kmem_cache_alloc(qeth_core_header_cache,
 921                                                 GFP_ATOMIC);
 922                         if (!hdr)
 923                                 goto tx_drop;
 924                         elements_needed++;
 925                         skb_reset_mac_header(new_skb);
 926                         qeth_l2_fill_header(card, hdr, new_skb, cast_type);
 927                         hdr->hdr.l2.pkt_length = new_skb->len;
 928                         memcpy(((char *)hdr) + sizeof(struct qeth_hdr),
 929                                 skb_mac_header(new_skb), ETH_HLEN);
 930                 } else {
 931                         /* create a clone with writeable headroom */
 932                         new_skb = skb_realloc_headroom(skb,
 933                                                 sizeof(struct qeth_hdr));
 934                         if (!new_skb)
 935                                 goto tx_drop;
 936                         hdr = (struct qeth_hdr *)skb_push(new_skb,
 937                                                 sizeof(struct qeth_hdr));
 938                         skb_set_mac_header(new_skb, sizeof(struct qeth_hdr));
 939                         qeth_l2_fill_header(card, hdr, new_skb, cast_type);
 940                         if (new_skb->ip_summed == CHECKSUM_PARTIAL)
 941                                 qeth_l2_hdr_csum(card, hdr, new_skb);
 942                 }
 943         }
 944
 945         elements = qeth_get_elements_no(card, new_skb, elements_needed);
 946         if (!elements) {
 947                 if (data_offset >= 0)
 948                         kmem_cache_free(qeth_core_header_cache, hdr);
 949                 goto tx_drop;
 950         }
 951
 952         if (card->info.type != QETH_CARD_TYPE_IQD) {
 953                 if (qeth_hdr_chk_and_bounce(new_skb, &hdr,
 954                     sizeof(struct qeth_hdr_layer2)))
 955                         goto tx_drop;
 956                 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
 957                                          elements);
 958         } else
 959                 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
 960                                         elements, data_offset, hd_len);
 961         if (!rc) {
 962                 card->stats.tx_packets++;
 963                 card->stats.tx_bytes += tx_bytes;
 964                 if (card->options.performance_stats) {
 965                         nr_frags = skb_shinfo(new_skb)->nr_frags;
 966                         if (nr_frags) {
 967                                 card->perf_stats.sg_skbs_sent++;
 968                                 /* nr_frags + skb->data */
 969                                 card->perf_stats.sg_frags_sent += nr_frags + 1;
 970                         }
 971                 }
 972                 if (new_skb != skb)
 973                         dev_kfree_skb_any(skb);
 974                 rc = NETDEV_TX_OK;
 975         } else {
 976                 if (data_offset >= 0)
 977                         kmem_cache_free(qeth_core_header_cache, hdr);
 978
 979                 if (rc == -EBUSY) {
 980                         if (new_skb != skb)
 981                                 dev_kfree_skb_any(new_skb);
 982                         return NETDEV_TX_BUSY;
 983                 } else
 984                         goto tx_drop;
 985         }
 986
 987         netif_wake_queue(dev);
 988         if (card->options.performance_stats)
 989                 card->perf_stats.outbound_time += qeth_get_micros() -
 990                         card->perf_stats.outbound_start_time;
 991         return rc;
 992
 993 tx_drop:
 994         card->stats.tx_dropped++;
 995         card->stats.tx_errors++;
 996         if ((new_skb != skb) && new_skb)
 997                 dev_kfree_skb_any(new_skb);
 998         dev_kfree_skb_any(skb);
 999         netif_wake_queue(dev);
1000         return NETDEV_TX_OK;
1001 }
1002
1003 static int __qeth_l2_open(struct net_device *dev)
1004 {
1005         struct qeth_card *card = dev->ml_priv;
1006         int rc = 0;
1007
1008         QETH_CARD_TEXT(card, 4, "qethopen");
1009         if (card->state == CARD_STATE_UP)
1010                 return rc;
1011         if (card->state != CARD_STATE_SOFTSETUP)
1012                 return -ENODEV;
1013
1014         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
1015              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
1016                 QETH_CARD_TEXT(card, 4, "nomacadr");
1017                 return -EPERM;
1018         }
1019         card->data.state = CH_STATE_UP;
1020         card->state = CARD_STATE_UP;
1021         netif_start_queue(dev);
1022
1023         if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) {
1024                 napi_enable(&card->napi);
1025                 napi_schedule(&card->napi);
1026         } else
1027                 rc = -EIO;
1028         return rc;
1029 }
1030
1031 static int qeth_l2_open(struct net_device *dev)
1032 {
1033         struct qeth_card *card = dev->ml_priv;
1034
1035         QETH_CARD_TEXT(card, 5, "qethope_");
1036         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
1037                 QETH_CARD_TEXT(card, 3, "openREC");
1038                 return -ERESTARTSYS;
1039         }
1040         return __qeth_l2_open(dev);
1041 }
1042
1043 static int qeth_l2_stop(struct net_device *dev)
1044 {
1045         struct qeth_card *card = dev->ml_priv;
1046
1047         QETH_CARD_TEXT(card, 4, "qethstop");
1048         netif_tx_disable(dev);
1049         if (card->state == CARD_STATE_UP) {
1050                 card->state = CARD_STATE_SOFTSETUP;
1051                 napi_disable(&card->napi);
1052         }
1053         return 0;
1054 }
1055
1056 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
1057 {
1058         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1059
1060         qeth_l2_create_device_attributes(&gdev->dev);
1061         INIT_LIST_HEAD(&card->vid_list);
1062         hash_init(card->mac_htable);
1063         card->options.layer2 = 1;
1064         card->info.hwtrap = 0;
1065         return 0;
1066 }
1067
1068 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
1069 {
1070         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1071
1072         qeth_l2_remove_device_attributes(&cgdev->dev);
1073         qeth_set_allowed_threads(card, 0, 1);
1074         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1075
1076         if (cgdev->state == CCWGROUP_ONLINE)
1077                 qeth_l2_set_offline(cgdev);
1078
1079         if (card->dev) {
1080                 unregister_netdev(card->dev);
1081                 card->dev = NULL;
1082         }
1083         return;
1084 }
1085
1086 static const struct ethtool_ops qeth_l2_ethtool_ops = {
1087         .get_link = ethtool_op_get_link,
1088         .get_strings = qeth_core_get_strings,
1089         .get_ethtool_stats = qeth_core_get_ethtool_stats,
1090         .get_sset_count = qeth_core_get_sset_count,
1091         .get_drvinfo = qeth_core_get_drvinfo,
1092         .get_settings = qeth_core_ethtool_get_settings,
1093 };
1094
1095 static const struct ethtool_ops qeth_l2_osn_ops = {
1096         .get_strings = qeth_core_get_strings,
1097         .get_ethtool_stats = qeth_core_get_ethtool_stats,
1098         .get_sset_count = qeth_core_get_sset_count,
1099         .get_drvinfo = qeth_core_get_drvinfo,
1100 };
1101
1102 static const struct net_device_ops qeth_l2_netdev_ops = {
1103         .ndo_open               = qeth_l2_open,
1104         .ndo_stop               = qeth_l2_stop,
1105         .ndo_get_stats          = qeth_get_stats,
1106         .ndo_start_xmit         = qeth_l2_hard_start_xmit,
1107         .ndo_validate_addr      = eth_validate_addr,
1108         .ndo_set_rx_mode        = qeth_l2_set_rx_mode,
1109         .ndo_do_ioctl           = qeth_l2_do_ioctl,
1110         .ndo_set_mac_address    = qeth_l2_set_mac_address,
1111         .ndo_change_mtu         = qeth_change_mtu,
1112         .ndo_vlan_rx_add_vid    = qeth_l2_vlan_rx_add_vid,
1113         .ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,
1114         .ndo_tx_timeout         = qeth_tx_timeout,
1115         .ndo_fix_features       = qeth_l2_fix_features,
1116         .ndo_set_features       = qeth_l2_set_features
1117 };
1118
1119 static int qeth_l2_setup_netdev(struct qeth_card *card)
1120 {
1121         switch (card->info.type) {
1122         case QETH_CARD_TYPE_IQD:
1123                 card->dev = alloc_netdev(0, "hsi%d", NET_NAME_UNKNOWN,
1124                                          ether_setup);
1125                 break;
1126         case QETH_CARD_TYPE_OSN:
1127                 card->dev = alloc_netdev(0, "osn%d", NET_NAME_UNKNOWN,
1128                                          ether_setup);
1129                 card->dev->flags |= IFF_NOARP;
1130                 break;
1131         default:
1132                 card->dev = alloc_etherdev(0);
1133         }
1134
1135         if (!card->dev)
1136                 return -ENODEV;
1137
1138         card->dev->ml_priv = card;
1139         card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
1140         card->dev->mtu = card->info.initial_mtu;
1141         card->dev->netdev_ops = &qeth_l2_netdev_ops;
1142         card->dev->ethtool_ops =
1143                 (card->info.type != QETH_CARD_TYPE_OSN) ?
1144                 &qeth_l2_ethtool_ops : &qeth_l2_osn_ops;
1145         card->dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
1146         if (card->info.type == QETH_CARD_TYPE_OSD && !card->info.guestlan) {
1147                 card->dev->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM |
1148                                          NETIF_F_SG;
1149                 /* Turn on RX offloading and SG per default */
1150                 card->dev->features |= NETIF_F_RXCSUM | NETIF_F_SG;
1151         }
1152         card->info.broadcast_capable = 1;
1153         qeth_l2_request_initial_mac(card);
1154         card->dev->gso_max_size = (QETH_MAX_BUFFER_ELEMENTS(card) - 1) *
1155                                   PAGE_SIZE;
1156         card->dev->gso_max_segs = (QETH_MAX_BUFFER_ELEMENTS(card) - 1);
1157         SET_NETDEV_DEV(card->dev, &card->gdev->dev);
1158         netif_napi_add(card->dev, &card->napi, qeth_l2_poll, QETH_NAPI_WEIGHT);
1159         netif_carrier_off(card->dev);
1160         return register_netdev(card->dev);
1161 }
1162
1163 static int qeth_l2_start_ipassists(struct qeth_card *card)
1164 {
1165         /* configure isolation level */
1166         if (qeth_set_access_ctrl_online(card, 0))
1167                 return -ENODEV;
1168         if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM))
1169                 qeth_set_rx_csum(card, 1);
1170         qeth_start_ipa_tx_checksum(card);
1171         return 0;
1172 }
1173
1174 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
1175 {
1176         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1177         int rc = 0;
1178         enum qeth_card_states recover_flag;
1179
1180         mutex_lock(&card->discipline_mutex);
1181         mutex_lock(&card->conf_mutex);
1182         QETH_DBF_TEXT(SETUP, 2, "setonlin");
1183         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1184
1185         recover_flag = card->state;
1186         rc = qeth_core_hardsetup_card(card);
1187         if (rc) {
1188                 QETH_DBF_TEXT_(SETUP, 2, "2err%04x", rc);
1189                 rc = -ENODEV;
1190                 goto out_remove;
1191         }
1192         qeth_bridgeport_query_support(card);
1193         if (card->options.sbp.supported_funcs)
1194                 dev_info(&card->gdev->dev,
1195                 "The device represents a Bridge Capable Port\n");
1196         qeth_trace_features(card);
1197
1198         if (!card->dev && qeth_l2_setup_netdev(card)) {
1199                 rc = -ENODEV;
1200                 goto out_remove;
1201         }
1202
1203         if (card->info.type != QETH_CARD_TYPE_OSN)
1204                 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
1205
1206         if (qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP)) {
1207                 if (card->info.hwtrap &&
1208                     qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM))
1209                         card->info.hwtrap = 0;
1210         } else
1211                 card->info.hwtrap = 0;
1212
1213         qeth_l2_setup_bridgeport_attrs(card);
1214
1215         card->state = CARD_STATE_HARDSETUP;
1216         memset(&card->rx, 0, sizeof(struct qeth_rx));
1217         qeth_print_status_message(card);
1218
1219         /* softsetup */
1220         QETH_DBF_TEXT(SETUP, 2, "softsetp");
1221
1222         rc = qeth_send_startlan(card);
1223         if (rc) {
1224                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1225                 if (rc == 0xe080) {
1226                         dev_warn(&card->gdev->dev,
1227                                 "The LAN is offline\n");
1228                         card->lan_online = 0;
1229                         goto contin;
1230                 }
1231                 rc = -ENODEV;
1232                 goto out_remove;
1233         } else
1234                 card->lan_online = 1;
1235
1236 contin:
1237         if ((card->info.type == QETH_CARD_TYPE_OSD) ||
1238             (card->info.type == QETH_CARD_TYPE_OSX)) {
1239                 if (qeth_l2_start_ipassists(card))
1240                         goto out_remove;
1241         }
1242
1243         if (card->info.type != QETH_CARD_TYPE_OSN &&
1244             card->info.type != QETH_CARD_TYPE_OSM)
1245                 qeth_l2_process_vlans(card);
1246
1247         netif_tx_disable(card->dev);
1248
1249         rc = qeth_init_qdio_queues(card);
1250         if (rc) {
1251                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1252                 rc = -ENODEV;
1253                 goto out_remove;
1254         }
1255         card->state = CARD_STATE_SOFTSETUP;
1256         if (card->lan_online)
1257                 netif_carrier_on(card->dev);
1258         else
1259                 netif_carrier_off(card->dev);
1260
1261         qeth_set_allowed_threads(card, 0xffffffff, 0);
1262         if (recover_flag == CARD_STATE_RECOVER) {
1263                 if (recovery_mode &&
1264                     card->info.type != QETH_CARD_TYPE_OSN) {
1265                         __qeth_l2_open(card->dev);
1266                 } else {
1267                         rtnl_lock();
1268                         dev_open(card->dev);
1269                         rtnl_unlock();
1270                 }
1271                 /* this also sets saved unicast addresses */
1272                 qeth_l2_set_rx_mode(card->dev);
1273         }
1274         /* let user_space know that device is online */
1275         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1276         mutex_unlock(&card->conf_mutex);
1277         mutex_unlock(&card->discipline_mutex);
1278         return 0;
1279
1280 out_remove:
1281         qeth_l2_stop_card(card, 0);
1282         ccw_device_set_offline(CARD_DDEV(card));
1283         ccw_device_set_offline(CARD_WDEV(card));
1284         ccw_device_set_offline(CARD_RDEV(card));
1285         qdio_free(CARD_DDEV(card));
1286         if (recover_flag == CARD_STATE_RECOVER)
1287                 card->state = CARD_STATE_RECOVER;
1288         else
1289                 card->state = CARD_STATE_DOWN;
1290         mutex_unlock(&card->conf_mutex);
1291         mutex_unlock(&card->discipline_mutex);
1292         return rc;
1293 }
1294
1295 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1296 {
1297         return __qeth_l2_set_online(gdev, 0);
1298 }
1299
1300 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1301                                         int recovery_mode)
1302 {
1303         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1304         int rc = 0, rc2 = 0, rc3 = 0;
1305         enum qeth_card_states recover_flag;
1306
1307         mutex_lock(&card->discipline_mutex);
1308         mutex_lock(&card->conf_mutex);
1309         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1310         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1311
1312         if (card->dev && netif_carrier_ok(card->dev))
1313                 netif_carrier_off(card->dev);
1314         recover_flag = card->state;
1315         if ((!recovery_mode && card->info.hwtrap) || card->info.hwtrap == 2) {
1316                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1317                 card->info.hwtrap = 1;
1318         }
1319         qeth_l2_stop_card(card, recovery_mode);
1320         rc  = ccw_device_set_offline(CARD_DDEV(card));
1321         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1322         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1323         if (!rc)
1324                 rc = (rc2) ? rc2 : rc3;
1325         if (rc)
1326                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1327         qdio_free(CARD_DDEV(card));
1328         if (recover_flag == CARD_STATE_UP)
1329                 card->state = CARD_STATE_RECOVER;
1330         /* let user_space know that device is offline */
1331         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1332         mutex_unlock(&card->conf_mutex);
1333         mutex_unlock(&card->discipline_mutex);
1334         return 0;
1335 }
1336
1337 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1338 {
1339         return __qeth_l2_set_offline(cgdev, 0);
1340 }
1341
1342 static int qeth_l2_recover(void *ptr)
1343 {
1344         struct qeth_card *card;
1345         int rc = 0;
1346
1347         card = (struct qeth_card *) ptr;
1348         QETH_CARD_TEXT(card, 2, "recover1");
1349         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1350                 return 0;
1351         QETH_CARD_TEXT(card, 2, "recover2");
1352         dev_warn(&card->gdev->dev,
1353                 "A recovery process has been started for the device\n");
1354         qeth_set_recovery_task(card);
1355         __qeth_l2_set_offline(card->gdev, 1);
1356         rc = __qeth_l2_set_online(card->gdev, 1);
1357         if (!rc)
1358                 dev_info(&card->gdev->dev,
1359                         "Device successfully recovered!\n");
1360         else {
1361                 qeth_close_dev(card);
1362                 dev_warn(&card->gdev->dev, "The qeth device driver "
1363                                 "failed to recover an error on the device\n");
1364         }
1365         qeth_clear_recovery_task(card);
1366         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1367         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1368         return 0;
1369 }
1370
1371 static int __init qeth_l2_init(void)
1372 {
1373         pr_info("register layer 2 discipline\n");
1374         return 0;
1375 }
1376
1377 static void __exit qeth_l2_exit(void)
1378 {
1379         pr_info("unregister layer 2 discipline\n");
1380 }
1381
1382 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1383 {
1384         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1385         qeth_set_allowed_threads(card, 0, 1);
1386         if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
1387                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1388         qeth_qdio_clear_card(card, 0);
1389         qeth_clear_qdio_buffers(card);
1390         qdio_free(CARD_DDEV(card));
1391 }
1392
1393 static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev)
1394 {
1395         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1396
1397         if (card->dev)
1398                 netif_device_detach(card->dev);
1399         qeth_set_allowed_threads(card, 0, 1);
1400         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1401         if (gdev->state == CCWGROUP_OFFLINE)
1402                 return 0;
1403         if (card->state == CARD_STATE_UP) {
1404                 if (card->info.hwtrap)
1405                         qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1406                 __qeth_l2_set_offline(card->gdev, 1);
1407         } else
1408                 __qeth_l2_set_offline(card->gdev, 0);
1409         return 0;
1410 }
1411
1412 static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
1413 {
1414         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1415         int rc = 0;
1416
1417         if (gdev->state == CCWGROUP_OFFLINE)
1418                 goto out;
1419
1420         if (card->state == CARD_STATE_RECOVER) {
1421                 rc = __qeth_l2_set_online(card->gdev, 1);
1422                 if (rc) {
1423                         rtnl_lock();
1424                         dev_close(card->dev);
1425                         rtnl_unlock();
1426                 }
1427         } else
1428                 rc = __qeth_l2_set_online(card->gdev, 0);
1429 out:
1430         qeth_set_allowed_threads(card, 0xffffffff, 0);
1431         if (card->dev)
1432                 netif_device_attach(card->dev);
1433         if (rc)
1434                 dev_warn(&card->gdev->dev, "The qeth device driver "
1435                         "failed to recover an error on the device\n");
1436         return rc;
1437 }
1438
1439 /* Returns zero if the command is successfully "consumed" */
1440 static int qeth_l2_control_event(struct qeth_card *card,
1441                                         struct qeth_ipa_cmd *cmd)
1442 {
1443         switch (cmd->hdr.command) {
1444         case IPA_CMD_SETBRIDGEPORT_OSA:
1445         case IPA_CMD_SETBRIDGEPORT_IQD:
1446                 if (cmd->data.sbp.hdr.command_code ==
1447                                 IPA_SBP_BRIDGE_PORT_STATE_CHANGE) {
1448                         qeth_bridge_state_change(card, cmd);
1449                         return 0;
1450                 } else
1451                         return 1;
1452         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
1453                 qeth_bridge_host_event(card, cmd);
1454                 return 0;
1455         default:
1456                 return 1;
1457         }
1458 }
1459
1460 struct qeth_discipline qeth_l2_discipline = {
1461         .start_poll = qeth_qdio_start_poll,
1462         .input_handler = (qdio_handler_t *) qeth_qdio_input_handler,
1463         .output_handler = (qdio_handler_t *) qeth_qdio_output_handler,
1464         .recover = qeth_l2_recover,
1465         .setup = qeth_l2_probe_device,
1466         .remove = qeth_l2_remove_device,
1467         .set_online = qeth_l2_set_online,
1468         .set_offline = qeth_l2_set_offline,
1469         .shutdown = qeth_l2_shutdown,
1470         .freeze = qeth_l2_pm_suspend,
1471         .thaw = qeth_l2_pm_resume,
1472         .restore = qeth_l2_pm_resume,
1473         .control_event_handler = qeth_l2_control_event,
1474 };
1475 EXPORT_SYMBOL_GPL(qeth_l2_discipline);
1476
1477 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1478                            struct qeth_cmd_buffer *iob)
1479 {
1480         unsigned long flags;
1481         int rc = 0;
1482
1483         QETH_CARD_TEXT(card, 5, "osndctrd");
1484
1485         wait_event(card->wait_q,
1486                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1487         qeth_prepare_control_data(card, len, iob);
1488         QETH_CARD_TEXT(card, 6, "osnoirqp");
1489         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1490         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1491                               (addr_t) iob, 0, 0);
1492         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1493         if (rc) {
1494                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1495                            "ccw_device_start rc = %i\n", rc);
1496                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1497                 qeth_release_buffer(iob->channel, iob);
1498                 atomic_set(&card->write.irq_pending, 0);
1499                 wake_up(&card->wait_q);
1500         }
1501         return rc;
1502 }
1503
1504 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1505                         struct qeth_cmd_buffer *iob, int data_len)
1506 {
1507         u16 s1, s2;
1508
1509         QETH_CARD_TEXT(card, 4, "osndipa");
1510
1511         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1512         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1513         s2 = (u16)data_len;
1514         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1515         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1516         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1517         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1518         return qeth_osn_send_control_data(card, s1, iob);
1519 }
1520
1521 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1522 {
1523         struct qeth_cmd_buffer *iob;
1524         struct qeth_card *card;
1525         int rc;
1526
1527         if (!dev)
1528                 return -ENODEV;
1529         card = dev->ml_priv;
1530         if (!card)
1531                 return -ENODEV;
1532         QETH_CARD_TEXT(card, 2, "osnsdmc");
1533         if (!qeth_card_hw_is_reachable(card))
1534                 return -ENODEV;
1535         iob = qeth_wait_for_buffer(&card->write);
1536         memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1537         rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1538         return rc;
1539 }
1540 EXPORT_SYMBOL(qeth_osn_assist);
1541
1542 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1543                   int (*assist_cb)(struct net_device *, void *),
1544                   int (*data_cb)(struct sk_buff *))
1545 {
1546         struct qeth_card *card;
1547
1548         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1549         if (*dev == NULL)
1550                 return -ENODEV;
1551         card = (*dev)->ml_priv;
1552         if (!card)
1553                 return -ENODEV;
1554         QETH_CARD_TEXT(card, 2, "osnreg");
1555         if ((assist_cb == NULL) || (data_cb == NULL))
1556                 return -EINVAL;
1557         card->osn_info.assist_cb = assist_cb;
1558         card->osn_info.data_cb = data_cb;
1559         return 0;
1560 }
1561 EXPORT_SYMBOL(qeth_osn_register);
1562
1563 void qeth_osn_deregister(struct net_device *dev)
1564 {
1565         struct qeth_card *card;
1566
1567         if (!dev)
1568                 return;
1569         card = dev->ml_priv;
1570         if (!card)
1571                 return;
1572         QETH_CARD_TEXT(card, 2, "osndereg");
1573         card->osn_info.assist_cb = NULL;
1574         card->osn_info.data_cb = NULL;
1575         return;
1576 }
1577 EXPORT_SYMBOL(qeth_osn_deregister);
1578
1579 /* SETBRIDGEPORT support, async notifications */
1580
1581 enum qeth_an_event_type {anev_reg_unreg, anev_abort, anev_reset};
1582
1583 /**
1584  * qeth_bridge_emit_host_event() - bridgeport address change notification
1585  * @card:  qeth_card structure pointer, for udev events.
1586  * @evtype:  "normal" register/unregister, or abort, or reset. For abort
1587  *            and reset token and addr_lnid are unused and may be NULL.
1588  * @code:  event bitmask: high order bit 0x80 value 1 means removal of an
1589  *                        object, 0 - addition of an object.
1590  *                        0x01 - VLAN, 0x02 - MAC, 0x03 - VLAN and MAC.
1591  * @token: "network token" structure identifying physical address of the port.
1592  * @addr_lnid: pointer to structure with MAC address and VLAN ID.
1593  *
1594  * This function is called when registrations and deregistrations are
1595  * reported by the hardware, and also when notifications are enabled -
1596  * for all currently registered addresses.
1597  */
1598 static void qeth_bridge_emit_host_event(struct qeth_card *card,
1599         enum qeth_an_event_type evtype,
1600         u8 code, struct net_if_token *token, struct mac_addr_lnid *addr_lnid)
1601 {
1602         char str[7][32];
1603         char *env[8];
1604         int i = 0;
1605
1606         switch (evtype) {
1607         case anev_reg_unreg:
1608                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=%s",
1609                                 (code & IPA_ADDR_CHANGE_CODE_REMOVAL)
1610                                 ? "deregister" : "register");
1611                 env[i] = str[i]; i++;
1612                 if (code & IPA_ADDR_CHANGE_CODE_VLANID) {
1613                         snprintf(str[i], sizeof(str[i]), "VLAN=%d",
1614                                 addr_lnid->lnid);
1615                         env[i] = str[i]; i++;
1616                 }
1617                 if (code & IPA_ADDR_CHANGE_CODE_MACADDR) {
1618                         snprintf(str[i], sizeof(str[i]), "MAC=%pM",
1619                                 addr_lnid->mac);
1620                         env[i] = str[i]; i++;
1621                 }
1622                 snprintf(str[i], sizeof(str[i]), "NTOK_BUSID=%x.%x.%04x",
1623                         token->cssid, token->ssid, token->devnum);
1624                 env[i] = str[i]; i++;
1625                 snprintf(str[i], sizeof(str[i]), "NTOK_IID=%02x", token->iid);
1626                 env[i] = str[i]; i++;
1627                 snprintf(str[i], sizeof(str[i]), "NTOK_CHPID=%02x",
1628                                 token->chpid);
1629                 env[i] = str[i]; i++;
1630                 snprintf(str[i], sizeof(str[i]), "NTOK_CHID=%04x", token->chid);
1631                 env[i] = str[i]; i++;
1632                 break;
1633         case anev_abort:
1634                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=abort");
1635                 env[i] = str[i]; i++;
1636                 break;
1637         case anev_reset:
1638                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=reset");
1639                 env[i] = str[i]; i++;
1640                 break;
1641         }
1642         env[i] = NULL;
1643         kobject_uevent_env(&card->gdev->dev.kobj, KOBJ_CHANGE, env);
1644 }
1645
1646 struct qeth_bridge_state_data {
1647         struct work_struct worker;
1648         struct qeth_card *card;
1649         struct qeth_sbp_state_change qports;
1650 };
1651
1652 static void qeth_bridge_state_change_worker(struct work_struct *work)
1653 {
1654         struct qeth_bridge_state_data *data =
1655                 container_of(work, struct qeth_bridge_state_data, worker);
1656         /* We are only interested in the first entry - local port */
1657         struct qeth_sbp_port_entry *entry = &data->qports.entry[0];
1658         char env_locrem[32];
1659         char env_role[32];
1660         char env_state[32];
1661         char *env[] = {
1662                 env_locrem,
1663                 env_role,
1664                 env_state,
1665                 NULL
1666         };
1667
1668         /* Role should not change by itself, but if it did, */
1669         /* information from the hardware is authoritative.  */
1670         mutex_lock(&data->card->conf_mutex);
1671         data->card->options.sbp.role = entry->role;
1672         mutex_unlock(&data->card->conf_mutex);
1673
1674         snprintf(env_locrem, sizeof(env_locrem), "BRIDGEPORT=statechange");
1675         snprintf(env_role, sizeof(env_role), "ROLE=%s",
1676                 (entry->role == QETH_SBP_ROLE_NONE) ? "none" :
1677                 (entry->role == QETH_SBP_ROLE_PRIMARY) ? "primary" :
1678                 (entry->role == QETH_SBP_ROLE_SECONDARY) ? "secondary" :
1679                 "<INVALID>");
1680         snprintf(env_state, sizeof(env_state), "STATE=%s",
1681                 (entry->state == QETH_SBP_STATE_INACTIVE) ? "inactive" :
1682                 (entry->state == QETH_SBP_STATE_STANDBY) ? "standby" :
1683                 (entry->state == QETH_SBP_STATE_ACTIVE) ? "active" :
1684                 "<INVALID>");
1685         kobject_uevent_env(&data->card->gdev->dev.kobj,
1686                                 KOBJ_CHANGE, env);
1687         kfree(data);
1688 }
1689
1690 static void qeth_bridge_state_change(struct qeth_card *card,
1691                                         struct qeth_ipa_cmd *cmd)
1692 {
1693         struct qeth_sbp_state_change *qports =
1694                  &cmd->data.sbp.data.state_change;
1695         struct qeth_bridge_state_data *data;
1696         int extrasize;
1697
1698         QETH_CARD_TEXT(card, 2, "brstchng");
1699         if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1700                 QETH_CARD_TEXT_(card, 2, "BPsz%04x", qports->entry_length);
1701                 return;
1702         }
1703         extrasize = sizeof(struct qeth_sbp_port_entry) * qports->num_entries;
1704         data = kzalloc(sizeof(struct qeth_bridge_state_data) + extrasize,
1705                 GFP_ATOMIC);
1706         if (!data) {
1707                 QETH_CARD_TEXT(card, 2, "BPSalloc");
1708                 return;
1709         }
1710         INIT_WORK(&data->worker, qeth_bridge_state_change_worker);
1711         data->card = card;
1712         memcpy(&data->qports, qports,
1713                         sizeof(struct qeth_sbp_state_change) + extrasize);
1714         queue_work(qeth_wq, &data->worker);
1715 }
1716
1717 struct qeth_bridge_host_data {
1718         struct work_struct worker;
1719         struct qeth_card *card;
1720         struct qeth_ipacmd_addr_change hostevs;
1721 };
1722
1723 static void qeth_bridge_host_event_worker(struct work_struct *work)
1724 {
1725         struct qeth_bridge_host_data *data =
1726                 container_of(work, struct qeth_bridge_host_data, worker);
1727         int i;
1728
1729         if (data->hostevs.lost_event_mask) {
1730                 dev_info(&data->card->gdev->dev,
1731 "Address notification from the Bridge Port stopped %s (%s)\n",
1732                         data->card->dev->name,
1733                         (data->hostevs.lost_event_mask == 0x01)
1734                         ? "Overflow"
1735                         : (data->hostevs.lost_event_mask == 0x02)
1736                         ? "Bridge port state change"
1737                         : "Unknown reason");
1738                 mutex_lock(&data->card->conf_mutex);
1739                 data->card->options.sbp.hostnotification = 0;
1740                 mutex_unlock(&data->card->conf_mutex);
1741                 qeth_bridge_emit_host_event(data->card, anev_abort,
1742                         0, NULL, NULL);
1743         } else
1744                 for (i = 0; i < data->hostevs.num_entries; i++) {
1745                         struct qeth_ipacmd_addr_change_entry *entry =
1746                                         &data->hostevs.entry[i];
1747                         qeth_bridge_emit_host_event(data->card,
1748                                         anev_reg_unreg,
1749                                         entry->change_code,
1750                                         &entry->token, &entry->addr_lnid);
1751                 }
1752         kfree(data);
1753 }
1754
1755 static void qeth_bridge_host_event(struct qeth_card *card,
1756                                         struct qeth_ipa_cmd *cmd)
1757 {
1758         struct qeth_ipacmd_addr_change *hostevs =
1759                  &cmd->data.addrchange;
1760         struct qeth_bridge_host_data *data;
1761         int extrasize;
1762
1763         QETH_CARD_TEXT(card, 2, "brhostev");
1764         if (cmd->hdr.return_code != 0x0000) {
1765                 if (cmd->hdr.return_code == 0x0010) {
1766                         if (hostevs->lost_event_mask == 0x00)
1767                                 hostevs->lost_event_mask = 0xff;
1768                 } else {
1769                         QETH_CARD_TEXT_(card, 2, "BPHe%04x",
1770                                 cmd->hdr.return_code);
1771                         return;
1772                 }
1773         }
1774         extrasize = sizeof(struct qeth_ipacmd_addr_change_entry) *
1775                                                 hostevs->num_entries;
1776         data = kzalloc(sizeof(struct qeth_bridge_host_data) + extrasize,
1777                 GFP_ATOMIC);
1778         if (!data) {
1779                 QETH_CARD_TEXT(card, 2, "BPHalloc");
1780                 return;
1781         }
1782         INIT_WORK(&data->worker, qeth_bridge_host_event_worker);
1783         data->card = card;
1784         memcpy(&data->hostevs, hostevs,
1785                         sizeof(struct qeth_ipacmd_addr_change) + extrasize);
1786         queue_work(qeth_wq, &data->worker);
1787 }
1788
1789 /* SETBRIDGEPORT support; sending commands */
1790
1791 struct _qeth_sbp_cbctl {
1792         u16 ipa_rc;
1793         u16 cmd_rc;
1794         union {
1795                 u32 supported;
1796                 struct {
1797                         enum qeth_sbp_roles *role;
1798                         enum qeth_sbp_states *state;
1799                 } qports;
1800         } data;
1801 };
1802
1803 /**
1804  * qeth_bridgeport_makerc() - derive "traditional" error from hardware codes.
1805  * @card:                     qeth_card structure pointer, for debug messages.
1806  * @cbctl:                    state structure with hardware return codes.
1807  * @setcmd:                   IPA command code
1808  *
1809  * Returns negative errno-compatible error indication or 0 on success.
1810  */
1811 static int qeth_bridgeport_makerc(struct qeth_card *card,
1812         struct _qeth_sbp_cbctl *cbctl, enum qeth_ipa_sbp_cmd setcmd)
1813 {
1814         int rc;
1815         int is_iqd = (card->info.type == QETH_CARD_TYPE_IQD);
1816
1817         if ((is_iqd && (cbctl->ipa_rc == IPA_RC_SUCCESS)) ||
1818             (!is_iqd && (cbctl->ipa_rc == cbctl->cmd_rc)))
1819                 switch (cbctl->cmd_rc) {
1820                 case 0x0000:
1821                         rc = 0;
1822                         break;
1823                 case 0x2B04:
1824                 case 0x0004:
1825                         rc = -EOPNOTSUPP;
1826                         break;
1827                 case 0x2B0C:
1828                 case 0x000C: /* Not configured as bridge Port */
1829                         rc = -ENODEV; /* maybe not the best code here? */
1830                         dev_err(&card->gdev->dev,
1831         "The device is not configured as a Bridge Port\n");
1832                         break;
1833                 case 0x2B10:
1834                 case 0x0010: /* OS mismatch */
1835                         rc = -EPERM;
1836                         dev_err(&card->gdev->dev,
1837         "A Bridge Port is already configured by a different operating system\n");
1838                         break;
1839                 case 0x2B14:
1840                 case 0x0014: /* Another device is Primary */
1841                         switch (setcmd) {
1842                         case IPA_SBP_SET_PRIMARY_BRIDGE_PORT:
1843                                 rc = -EEXIST;
1844                                 dev_err(&card->gdev->dev,
1845         "The LAN already has a primary Bridge Port\n");
1846                                 break;
1847                         case IPA_SBP_SET_SECONDARY_BRIDGE_PORT:
1848                                 rc = -EBUSY;
1849                                 dev_err(&card->gdev->dev,
1850         "The device is already a primary Bridge Port\n");
1851                                 break;
1852                         default:
1853                                 rc = -EIO;
1854                         }
1855                         break;
1856                 case 0x2B18:
1857                 case 0x0018: /* This device is currently Secondary */
1858                         rc = -EBUSY;
1859                         dev_err(&card->gdev->dev,
1860         "The device is already a secondary Bridge Port\n");
1861                         break;
1862                 case 0x2B1C:
1863                 case 0x001C: /* Limit for Secondary devices reached */
1864                         rc = -EEXIST;
1865                         dev_err(&card->gdev->dev,
1866         "The LAN cannot have more secondary Bridge Ports\n");
1867                         break;
1868                 case 0x2B24:
1869                 case 0x0024: /* This device is currently Primary */
1870                         rc = -EBUSY;
1871                         dev_err(&card->gdev->dev,
1872         "The device is already a primary Bridge Port\n");
1873                         break;
1874                 case 0x2B20:
1875                 case 0x0020: /* Not authorized by zManager */
1876                         rc = -EACCES;
1877                         dev_err(&card->gdev->dev,
1878         "The device is not authorized to be a Bridge Port\n");
1879                         break;
1880                 default:
1881                         rc = -EIO;
1882                 }
1883         else
1884                 switch (cbctl->ipa_rc) {
1885                 case IPA_RC_NOTSUPP:
1886                         rc = -EOPNOTSUPP;
1887                         break;
1888                 case IPA_RC_UNSUPPORTED_COMMAND:
1889                         rc = -EOPNOTSUPP;
1890                         break;
1891                 default:
1892                         rc = -EIO;
1893                 }
1894
1895         if (rc) {
1896                 QETH_CARD_TEXT_(card, 2, "SBPi%04x", cbctl->ipa_rc);
1897                 QETH_CARD_TEXT_(card, 2, "SBPc%04x", cbctl->cmd_rc);
1898         }
1899         return rc;
1900 }
1901
1902 static inline int ipa_cmd_sbp(struct qeth_card *card)
1903 {
1904         return (card->info.type == QETH_CARD_TYPE_IQD) ?
1905                 IPA_CMD_SETBRIDGEPORT_IQD :
1906                 IPA_CMD_SETBRIDGEPORT_OSA;
1907 }
1908
1909 static int qeth_bridgeport_query_support_cb(struct qeth_card *card,
1910         struct qeth_reply *reply, unsigned long data)
1911 {
1912         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1913         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1914         QETH_CARD_TEXT(card, 2, "brqsupcb");
1915         cbctl->ipa_rc = cmd->hdr.return_code;
1916         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1917         if ((cbctl->ipa_rc == 0) && (cbctl->cmd_rc == 0)) {
1918                 cbctl->data.supported =
1919                         cmd->data.sbp.data.query_cmds_supp.supported_cmds;
1920         } else {
1921                 cbctl->data.supported = 0;
1922         }
1923         return 0;
1924 }
1925
1926 /**
1927  * qeth_bridgeport_query_support() - store bitmask of supported subfunctions.
1928  * @card:                            qeth_card structure pointer.
1929  *
1930  * Sets bitmask of supported setbridgeport subfunctions in the qeth_card
1931  * strucutre: card->options.sbp.supported_funcs.
1932  */
1933 static void qeth_bridgeport_query_support(struct qeth_card *card)
1934 {
1935         struct qeth_cmd_buffer *iob;
1936         struct qeth_ipa_cmd *cmd;
1937         struct _qeth_sbp_cbctl cbctl;
1938
1939         QETH_CARD_TEXT(card, 2, "brqsuppo");
1940         iob = qeth_get_ipacmd_buffer(card, ipa_cmd_sbp(card), 0);
1941         if (!iob)
1942                 return;
1943         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
1944         cmd->data.sbp.hdr.cmdlength =
1945                 sizeof(struct qeth_ipacmd_sbp_hdr) +
1946                 sizeof(struct qeth_sbp_query_cmds_supp);
1947         cmd->data.sbp.hdr.command_code =
1948                 IPA_SBP_QUERY_COMMANDS_SUPPORTED;
1949         cmd->data.sbp.hdr.used_total = 1;
1950         cmd->data.sbp.hdr.seq_no = 1;
1951         if (qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_support_cb,
1952                                                         (void *)&cbctl) ||
1953             qeth_bridgeport_makerc(card, &cbctl,
1954                                         IPA_SBP_QUERY_COMMANDS_SUPPORTED)) {
1955                 /* non-zero makerc signifies failure, and produce messages */
1956                 card->options.sbp.role = QETH_SBP_ROLE_NONE;
1957                 return;
1958         }
1959         card->options.sbp.supported_funcs = cbctl.data.supported;
1960 }
1961
1962 static int qeth_bridgeport_query_ports_cb(struct qeth_card *card,
1963         struct qeth_reply *reply, unsigned long data)
1964 {
1965         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1966         struct qeth_sbp_query_ports *qports = &cmd->data.sbp.data.query_ports;
1967         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1968
1969         QETH_CARD_TEXT(card, 2, "brqprtcb");
1970         cbctl->ipa_rc = cmd->hdr.return_code;
1971         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1972         if ((cbctl->ipa_rc != 0) || (cbctl->cmd_rc != 0))
1973                 return 0;
1974         if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1975                 cbctl->cmd_rc = 0xffff;
1976                 QETH_CARD_TEXT_(card, 2, "SBPs%04x", qports->entry_length);
1977                 return 0;
1978         }
1979         /* first entry contains the state of the local port */
1980         if (qports->num_entries > 0) {
1981                 if (cbctl->data.qports.role)
1982                         *cbctl->data.qports.role = qports->entry[0].role;
1983                 if (cbctl->data.qports.state)
1984                         *cbctl->data.qports.state = qports->entry[0].state;
1985         }
1986         return 0;
1987 }
1988
1989 /**
1990  * qeth_bridgeport_query_ports() - query local bridgeport status.
1991  * @card:                          qeth_card structure pointer.
1992  * @role:   Role of the port: 0-none, 1-primary, 2-secondary.
1993  * @state:  State of the port: 0-inactive, 1-standby, 2-active.
1994  *
1995  * Returns negative errno-compatible error indication or 0 on success.
1996  *
1997  * 'role' and 'state' are not updated in case of hardware operation failure.
1998  */
1999 int qeth_bridgeport_query_ports(struct qeth_card *card,
2000         enum qeth_sbp_roles *role, enum qeth_sbp_states *state)
2001 {
2002         int rc = 0;
2003         struct qeth_cmd_buffer *iob;
2004         struct qeth_ipa_cmd *cmd;
2005         struct _qeth_sbp_cbctl cbctl = {
2006                 .data = {
2007                         .qports = {
2008                                 .role = role,
2009                                 .state = state,
2010                         },
2011                 },
2012         };
2013
2014         QETH_CARD_TEXT(card, 2, "brqports");
2015         if (!(card->options.sbp.supported_funcs & IPA_SBP_QUERY_BRIDGE_PORTS))
2016                 return -EOPNOTSUPP;
2017         iob = qeth_get_ipacmd_buffer(card, ipa_cmd_sbp(card), 0);
2018         if (!iob)
2019                 return -ENOMEM;
2020         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
2021         cmd->data.sbp.hdr.cmdlength =
2022                 sizeof(struct qeth_ipacmd_sbp_hdr);
2023         cmd->data.sbp.hdr.command_code =
2024                 IPA_SBP_QUERY_BRIDGE_PORTS;
2025         cmd->data.sbp.hdr.used_total = 1;
2026         cmd->data.sbp.hdr.seq_no = 1;
2027         rc = qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_ports_cb,
2028                                 (void *)&cbctl);
2029         if (rc < 0)
2030                 return rc;
2031         return qeth_bridgeport_makerc(card, &cbctl, IPA_SBP_QUERY_BRIDGE_PORTS);
2032 }
2033 EXPORT_SYMBOL_GPL(qeth_bridgeport_query_ports);
2034
2035 static int qeth_bridgeport_set_cb(struct qeth_card *card,
2036         struct qeth_reply *reply, unsigned long data)
2037 {
2038         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
2039         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
2040         QETH_CARD_TEXT(card, 2, "brsetrcb");
2041         cbctl->ipa_rc = cmd->hdr.return_code;
2042         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
2043         return 0;
2044 }
2045
2046 /**
2047  * qeth_bridgeport_setrole() - Assign primary role to the port.
2048  * @card:                      qeth_card structure pointer.
2049  * @role:                      Role to assign.
2050  *
2051  * Returns negative errno-compatible error indication or 0 on success.
2052  */
2053 int qeth_bridgeport_setrole(struct qeth_card *card, enum qeth_sbp_roles role)
2054 {
2055         int rc = 0;
2056         int cmdlength;
2057         struct qeth_cmd_buffer *iob;
2058         struct qeth_ipa_cmd *cmd;
2059         struct _qeth_sbp_cbctl cbctl;
2060         enum qeth_ipa_sbp_cmd setcmd;
2061
2062         QETH_CARD_TEXT(card, 2, "brsetrol");
2063         switch (role) {
2064         case QETH_SBP_ROLE_NONE:
2065                 setcmd = IPA_SBP_RESET_BRIDGE_PORT_ROLE;
2066                 cmdlength =  sizeof(struct qeth_ipacmd_sbp_hdr) +
2067                         sizeof(struct qeth_sbp_reset_role);
2068                 break;
2069         case QETH_SBP_ROLE_PRIMARY:
2070                 setcmd = IPA_SBP_SET_PRIMARY_BRIDGE_PORT;
2071                 cmdlength =  sizeof(struct qeth_ipacmd_sbp_hdr) +
2072                         sizeof(struct qeth_sbp_set_primary);
2073                 break;
2074         case QETH_SBP_ROLE_SECONDARY:
2075                 setcmd = IPA_SBP_SET_SECONDARY_BRIDGE_PORT;
2076                 cmdlength =  sizeof(struct qeth_ipacmd_sbp_hdr) +
2077                         sizeof(struct qeth_sbp_set_secondary);
2078                 break;
2079         default:
2080                 return -EINVAL;
2081         }
2082         if (!(card->options.sbp.supported_funcs & setcmd))
2083                 return -EOPNOTSUPP;
2084         iob = qeth_get_ipacmd_buffer(card, ipa_cmd_sbp(card), 0);
2085         if (!iob)
2086                 return -ENOMEM;
2087         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
2088         cmd->data.sbp.hdr.cmdlength = cmdlength;
2089         cmd->data.sbp.hdr.command_code = setcmd;
2090         cmd->data.sbp.hdr.used_total = 1;
2091         cmd->data.sbp.hdr.seq_no = 1;
2092         rc = qeth_send_ipa_cmd(card, iob, qeth_bridgeport_set_cb,
2093                                 (void *)&cbctl);
2094         if (rc < 0)
2095                 return rc;
2096         return qeth_bridgeport_makerc(card, &cbctl, setcmd);
2097 }
2098
2099 /**
2100  * qeth_anset_makerc() - derive "traditional" error from hardware codes.
2101  * @card:                     qeth_card structure pointer, for debug messages.
2102  *
2103  * Returns negative errno-compatible error indication or 0 on success.
2104  */
2105 static int qeth_anset_makerc(struct qeth_card *card, int pnso_rc, u16 response)
2106 {
2107         int rc;
2108
2109         if (pnso_rc == 0)
2110                 switch (response) {
2111                 case 0x0001:
2112                         rc = 0;
2113                         break;
2114                 case 0x0004:
2115                 case 0x0100:
2116                 case 0x0106:
2117                         rc = -EOPNOTSUPP;
2118                         dev_err(&card->gdev->dev,
2119                                 "Setting address notification failed\n");
2120                         break;
2121                 case 0x0107:
2122                         rc = -EAGAIN;
2123                         break;
2124                 default:
2125                         rc = -EIO;
2126                 }
2127         else
2128                 rc = -EIO;
2129
2130         if (rc) {
2131                 QETH_CARD_TEXT_(card, 2, "SBPp%04x", pnso_rc);
2132                 QETH_CARD_TEXT_(card, 2, "SBPr%04x", response);
2133         }
2134         return rc;
2135 }
2136
2137 static void qeth_bridgeport_an_set_cb(void *priv,
2138                 enum qdio_brinfo_entry_type type, void *entry)
2139 {
2140         struct qeth_card *card = (struct qeth_card *)priv;
2141         struct qdio_brinfo_entry_l2 *l2entry;
2142         u8 code;
2143
2144         if (type != l2_addr_lnid) {
2145                 WARN_ON_ONCE(1);
2146                 return;
2147         }
2148
2149         l2entry = (struct qdio_brinfo_entry_l2 *)entry;
2150         code = IPA_ADDR_CHANGE_CODE_MACADDR;
2151         if (l2entry->addr_lnid.lnid)
2152                 code |= IPA_ADDR_CHANGE_CODE_VLANID;
2153         qeth_bridge_emit_host_event(card, anev_reg_unreg, code,
2154                 (struct net_if_token *)&l2entry->nit,
2155                 (struct mac_addr_lnid *)&l2entry->addr_lnid);
2156 }
2157
2158 /**
2159  * qeth_bridgeport_an_set() - Enable or disable bridgeport address notification
2160  * @card:                     qeth_card structure pointer.
2161  * @enable:                   0 - disable, non-zero - enable notifications
2162  *
2163  * Returns negative errno-compatible error indication or 0 on success.
2164  *
2165  * On enable, emits a series of address notifications udev events for all
2166  * currently registered hosts.
2167  */
2168 int qeth_bridgeport_an_set(struct qeth_card *card, int enable)
2169 {
2170         int rc;
2171         u16 response;
2172         struct ccw_device *ddev;
2173         struct subchannel_id schid;
2174
2175         if (!card)
2176                 return -EINVAL;
2177         if (!card->options.sbp.supported_funcs)
2178                 return -EOPNOTSUPP;
2179         ddev = CARD_DDEV(card);
2180         ccw_device_get_schid(ddev, &schid);
2181
2182         if (enable) {
2183                 qeth_bridge_emit_host_event(card, anev_reset, 0, NULL, NULL);
2184                 rc = qdio_pnso_brinfo(schid, 1, &response,
2185                         qeth_bridgeport_an_set_cb, card);
2186         } else
2187                 rc = qdio_pnso_brinfo(schid, 0, &response, NULL, NULL);
2188         return qeth_anset_makerc(card, rc, response);
2189 }
2190 EXPORT_SYMBOL_GPL(qeth_bridgeport_an_set);
2191
2192 module_init(qeth_l2_init);
2193 module_exit(qeth_l2_exit);
2194 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
2195 MODULE_DESCRIPTION("qeth layer 2 discipline");
2196 MODULE_LICENSE("GPL");