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/ip.h>
  20 #include <linux/list.h>
  21 #include <linux/hash.h>
  22 #include <linux/hashtable.h>
  23 #include <linux/string.h>
  24 #include "qeth_core.h"
  25 #include "qeth_l2.h"
  26
  27 static int qeth_l2_set_offline(struct ccwgroup_device *);
  28 static int qeth_l2_stop(struct net_device *);
  29 static void qeth_l2_set_rx_mode(struct net_device *);
  30 static void qeth_bridgeport_query_support(struct qeth_card *card);
  31 static void qeth_bridge_state_change(struct qeth_card *card,
  32                                         struct qeth_ipa_cmd *cmd);
  33 static void qeth_bridge_host_event(struct qeth_card *card,
  34                                         struct qeth_ipa_cmd *cmd);
  35
  36 static int qeth_l2_verify_dev(struct net_device *dev)
  37 {
  38         struct qeth_card *card;
  39         unsigned long flags;
  40         int rc = 0;
  41
  42         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
  43         list_for_each_entry(card, &qeth_core_card_list.list, list) {
  44                 if (card->dev == dev) {
  45                         rc = QETH_REAL_CARD;
  46                         break;
  47                 }
  48         }
  49         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
  50
  51         return rc;
  52 }
  53
  54 static struct net_device *qeth_l2_netdev_by_devno(unsigned char *read_dev_no)
  55 {
  56         struct qeth_card *card;
  57         struct net_device *ndev;
  58         __u16 temp_dev_no;
  59         unsigned long flags;
  60         struct ccw_dev_id read_devid;
  61
  62         ndev = NULL;
  63         memcpy(&temp_dev_no, read_dev_no, 2);
  64         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
  65         list_for_each_entry(card, &qeth_core_card_list.list, list) {
  66                 ccw_device_get_id(CARD_RDEV(card), &read_devid);
  67                 if (read_devid.devno == temp_dev_no) {
  68                         ndev = card->dev;
  69                         break;
  70                 }
  71         }
  72         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
  73         return ndev;
  74 }
  75
  76 static int qeth_setdel_makerc(struct qeth_card *card, int retcode)
  77 {
  78         int rc;
  79
  80         if (retcode)
  81                 QETH_CARD_TEXT_(card, 2, "err%04x", retcode);
  82         switch (retcode) {
  83         case IPA_RC_SUCCESS:
  84                 rc = 0;
  85                 break;
  86         case IPA_RC_L2_UNSUPPORTED_CMD:
  87                 rc = -EOPNOTSUPP;
  88                 break;
  89         case IPA_RC_L2_ADDR_TABLE_FULL:
  90                 rc = -ENOSPC;
  91                 break;
  92         case IPA_RC_L2_DUP_MAC:
  93         case IPA_RC_L2_DUP_LAYER3_MAC:
  94                 rc = -EEXIST;
  95                 break;
  96         case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
  97         case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
  98                 rc = -EPERM;
  99                 break;
 100         case IPA_RC_L2_MAC_NOT_FOUND:
 101                 rc = -ENOENT;
 102                 break;
 103         case -ENOMEM:
 104                 rc = -ENOMEM;
 105                 break;
 106         default:
 107                 rc = -EIO;
 108                 break;
 109         }
 110         return rc;
 111 }
 112
 113 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
 114                            enum qeth_ipa_cmds ipacmd)
 115 {
 116         struct qeth_ipa_cmd *cmd;
 117         struct qeth_cmd_buffer *iob;
 118
 119         QETH_CARD_TEXT(card, 2, "L2sdmac");
 120         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 121         if (!iob)
 122                 return -ENOMEM;
 123         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 124         cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
 125         memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
 126         return qeth_setdel_makerc(card, qeth_send_ipa_cmd(card, iob,
 127                                         NULL, NULL));
 128 }
 129
 130 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
 131 {
 132         int rc;
 133
 134         QETH_CARD_TEXT(card, 2, "L2Setmac");
 135         rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC);
 136         if (rc == 0) {
 137                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 138                 memcpy(card->dev->dev_addr, mac, OSA_ADDR_LEN);
 139                 dev_info(&card->gdev->dev,
 140                         "MAC address %pM successfully registered on device %s\n",
 141                         card->dev->dev_addr, card->dev->name);
 142         } else {
 143                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 144                 switch (rc) {
 145                 case -EEXIST:
 146                         dev_warn(&card->gdev->dev,
 147                                 "MAC address %pM already exists\n", mac);
 148                         break;
 149                 case -EPERM:
 150                         dev_warn(&card->gdev->dev,
 151                                 "MAC address %pM is not authorized\n", mac);
 152                         break;
 153                 }
 154         }
 155         return rc;
 156 }
 157
 158 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
 159 {
 160         int rc;
 161
 162         QETH_CARD_TEXT(card, 2, "L2Delmac");
 163         if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
 164                 return 0;
 165         rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC);
 166         if (rc == 0)
 167                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 168         return rc;
 169 }
 170
 171 static int qeth_l2_send_setgroupmac(struct qeth_card *card, __u8 *mac)
 172 {
 173         int rc;
 174
 175         QETH_CARD_TEXT(card, 2, "L2Sgmac");
 176         rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETGMAC);
 177         if (rc == -EEXIST)
 178                 QETH_DBF_MESSAGE(2, "Group MAC %pM already existing on %s\n",
 179                         mac, QETH_CARD_IFNAME(card));
 180         else if (rc)
 181                 QETH_DBF_MESSAGE(2, "Could not set group MAC %pM on %s: %d\n",
 182                         mac, QETH_CARD_IFNAME(card), rc);
 183         return rc;
 184 }
 185
 186 static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac)
 187 {
 188         int rc;
 189
 190         QETH_CARD_TEXT(card, 2, "L2Dgmac");
 191         rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELGMAC);
 192         if (rc)
 193                 QETH_DBF_MESSAGE(2,
 194                         "Could not delete group MAC %pM on %s: %d\n",
 195                         mac, QETH_CARD_IFNAME(card), rc);
 196         return rc;
 197 }
 198
 199 static int qeth_l2_write_mac(struct qeth_card *card, struct qeth_mac *mac)
 200 {
 201         if (mac->is_uc) {
 202                 return qeth_l2_send_setdelmac(card, mac->mac_addr,
 203                                                 IPA_CMD_SETVMAC);
 204         } else {
 205                 return qeth_l2_send_setgroupmac(card, mac->mac_addr);
 206         }
 207 }
 208
 209 static int qeth_l2_remove_mac(struct qeth_card *card, struct qeth_mac *mac)
 210 {
 211         if (mac->is_uc) {
 212                 return qeth_l2_send_setdelmac(card, mac->mac_addr,
 213                                                 IPA_CMD_DELVMAC);
 214         } else {
 215                 return qeth_l2_send_delgroupmac(card, mac->mac_addr);
 216         }
 217 }
 218
 219 static void qeth_l2_del_all_macs(struct qeth_card *card)
 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                 hash_del(&mac->hnode);
 228                 kfree(mac);
 229         }
 230         spin_unlock_bh(&card->mclock);
 231 }
 232
 233 static inline u32 qeth_l2_mac_hash(const u8 *addr)
 234 {
 235         return get_unaligned((u32 *)(&addr[2]));
 236 }
 237
 238 static inline int qeth_l2_get_cast_type(struct qeth_card *card,
 239                         struct sk_buff *skb)
 240 {
 241         if (card->info.type == QETH_CARD_TYPE_OSN)
 242                 return RTN_UNSPEC;
 243         if (is_broadcast_ether_addr(skb->data))
 244                 return RTN_BROADCAST;
 245         if (is_multicast_ether_addr(skb->data))
 246                 return RTN_MULTICAST;
 247         return RTN_UNSPEC;
 248 }
 249
 250 static inline void qeth_l2_hdr_csum(struct qeth_card *card,
 251                                     struct qeth_hdr *hdr, struct sk_buff *skb)
 252 {
 253         struct iphdr *iph = ip_hdr(skb);
 254
 255         /* tcph->check contains already the pseudo hdr checksum
 256          * so just set the header flags
 257          */
 258         if (iph->protocol == IPPROTO_UDP)
 259                 hdr->hdr.l2.flags[1] |= QETH_HDR_EXT_UDP;
 260         hdr->hdr.l2.flags[1] |= QETH_HDR_EXT_CSUM_TRANSP_REQ |
 261                 QETH_HDR_EXT_CSUM_HDR_REQ;
 262         iph->check = 0;
 263         if (card->options.performance_stats)
 264                 card->perf_stats.tx_csum++;
 265 }
 266
 267 static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
 268                         struct sk_buff *skb, int cast_type)
 269 {
 270         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
 271
 272         memset(hdr, 0, sizeof(struct qeth_hdr));
 273         hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
 274
 275         /* set byte byte 3 to casting flags */
 276         if (cast_type == RTN_MULTICAST)
 277                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 278         else if (cast_type == RTN_BROADCAST)
 279                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 280         else
 281                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 282
 283         hdr->hdr.l2.pkt_length = skb->len - sizeof(struct qeth_hdr);
 284         /* VSWITCH relies on the VLAN
 285          * information to be present in
 286          * the QDIO header */
 287         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
 288                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
 289                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
 290         }
 291 }
 292
 293 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
 294                         struct qeth_reply *reply, unsigned long data)
 295 {
 296         struct qeth_ipa_cmd *cmd;
 297
 298         QETH_CARD_TEXT(card, 2, "L2sdvcb");
 299         cmd = (struct qeth_ipa_cmd *) data;
 300         if (cmd->hdr.return_code) {
 301                 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x. "
 302                           "Continuing\n", cmd->data.setdelvlan.vlan_id,
 303                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 304                 QETH_CARD_TEXT_(card, 2, "L2VL%4x", cmd->hdr.command);
 305                 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code);
 306         }
 307         return 0;
 308 }
 309
 310 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
 311                                 enum qeth_ipa_cmds ipacmd)
 312 {
 313         struct qeth_ipa_cmd *cmd;
 314         struct qeth_cmd_buffer *iob;
 315
 316         QETH_CARD_TEXT_(card, 4, "L2sdv%x", ipacmd);
 317         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 318         if (!iob)
 319                 return -ENOMEM;
 320         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 321         cmd->data.setdelvlan.vlan_id = i;
 322         return qeth_send_ipa_cmd(card, iob,
 323                                  qeth_l2_send_setdelvlan_cb, NULL);
 324 }
 325
 326 static void qeth_l2_process_vlans(struct qeth_card *card)
 327 {
 328         struct qeth_vlan_vid *id;
 329         QETH_CARD_TEXT(card, 3, "L2prcvln");
 330         spin_lock_bh(&card->vlanlock);
 331         list_for_each_entry(id, &card->vid_list, list) {
 332                 qeth_l2_send_setdelvlan(card, id->vid, IPA_CMD_SETVLAN);
 333         }
 334         spin_unlock_bh(&card->vlanlock);
 335 }
 336
 337 static int qeth_l2_vlan_rx_add_vid(struct net_device *dev,
 338                                    __be16 proto, u16 vid)
 339 {
 340         struct qeth_card *card = dev->ml_priv;
 341         struct qeth_vlan_vid *id;
 342         int rc;
 343
 344         QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
 345         if (!vid)
 346                 return 0;
 347         if (card->info.type == QETH_CARD_TYPE_OSM) {
 348                 QETH_CARD_TEXT(card, 3, "aidOSM");
 349                 return 0;
 350         }
 351         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 352                 QETH_CARD_TEXT(card, 3, "aidREC");
 353                 return 0;
 354         }
 355         id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
 356         if (id) {
 357                 id->vid = vid;
 358                 rc = qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
 359                 if (rc) {
 360                         kfree(id);
 361                         return rc;
 362                 }
 363                 spin_lock_bh(&card->vlanlock);
 364                 list_add_tail(&id->list, &card->vid_list);
 365                 spin_unlock_bh(&card->vlanlock);
 366         } else {
 367                 return -ENOMEM;
 368         }
 369         return 0;
 370 }
 371
 372 static int qeth_l2_vlan_rx_kill_vid(struct net_device *dev,
 373                                     __be16 proto, u16 vid)
 374 {
 375         struct qeth_vlan_vid *id, *tmpid = NULL;
 376         struct qeth_card *card = dev->ml_priv;
 377         int rc = 0;
 378
 379         QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
 380         if (card->info.type == QETH_CARD_TYPE_OSM) {
 381                 QETH_CARD_TEXT(card, 3, "kidOSM");
 382                 return 0;
 383         }
 384         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 385                 QETH_CARD_TEXT(card, 3, "kidREC");
 386                 return 0;
 387         }
 388         spin_lock_bh(&card->vlanlock);
 389         list_for_each_entry(id, &card->vid_list, list) {
 390                 if (id->vid == vid) {
 391                         list_del(&id->list);
 392                         tmpid = id;
 393                         break;
 394                 }
 395         }
 396         spin_unlock_bh(&card->vlanlock);
 397         if (tmpid) {
 398                 rc = qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 399                 kfree(tmpid);
 400         }
 401         qeth_l2_set_rx_mode(card->dev);
 402         return rc;
 403 }
 404
 405 static void qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
 406 {
 407         QETH_DBF_TEXT(SETUP , 2, "stopcard");
 408         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 409
 410         qeth_set_allowed_threads(card, 0, 1);
 411         if (card->read.state == CH_STATE_UP &&
 412             card->write.state == CH_STATE_UP &&
 413             (card->state == CARD_STATE_UP)) {
 414                 if (recovery_mode &&
 415                     card->info.type != QETH_CARD_TYPE_OSN) {
 416                         qeth_l2_stop(card->dev);
 417                 } else {
 418                         rtnl_lock();
 419                         dev_close(card->dev);
 420                         rtnl_unlock();
 421                 }
 422                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 423                 card->state = CARD_STATE_SOFTSETUP;
 424         }
 425         if (card->state == CARD_STATE_SOFTSETUP) {
 426                 qeth_l2_del_all_macs(card);
 427                 qeth_clear_ipacmd_list(card);
 428                 card->state = CARD_STATE_HARDSETUP;
 429         }
 430         if (card->state == CARD_STATE_HARDSETUP) {
 431                 qeth_qdio_clear_card(card, 0);
 432                 qeth_clear_qdio_buffers(card);
 433                 qeth_clear_working_pool_list(card);
 434                 card->state = CARD_STATE_DOWN;
 435         }
 436         if (card->state == CARD_STATE_DOWN) {
 437                 qeth_clear_cmd_buffers(&card->read);
 438                 qeth_clear_cmd_buffers(&card->write);
 439         }
 440 }
 441
 442 static int qeth_l2_process_inbound_buffer(struct qeth_card *card,
 443                                 int budget, int *done)
 444 {
 445         int work_done = 0;
 446         struct sk_buff *skb;
 447         struct qeth_hdr *hdr;
 448         unsigned int len;
 449
 450         *done = 0;
 451         WARN_ON_ONCE(!budget);
 452         while (budget) {
 453                 skb = qeth_core_get_next_skb(card,
 454                         &card->qdio.in_q->bufs[card->rx.b_index],
 455                         &card->rx.b_element, &card->rx.e_offset, &hdr);
 456                 if (!skb) {
 457                         *done = 1;
 458                         break;
 459                 }
 460                 skb->dev = card->dev;
 461                 switch (hdr->hdr.l2.id) {
 462                 case QETH_HEADER_TYPE_LAYER2:
 463                         skb->pkt_type = PACKET_HOST;
 464                         skb->protocol = eth_type_trans(skb, skb->dev);
 465                         if ((card->dev->features & NETIF_F_RXCSUM)
 466                            && ((hdr->hdr.l2.flags[1] &
 467                                 (QETH_HDR_EXT_CSUM_HDR_REQ |
 468                                    QETH_HDR_EXT_CSUM_TRANSP_REQ)) ==
 469                                 (QETH_HDR_EXT_CSUM_HDR_REQ |
 470                                    QETH_HDR_EXT_CSUM_TRANSP_REQ)))
 471                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 472                         else
 473                                 skb->ip_summed = CHECKSUM_NONE;
 474                         if (skb->protocol == htons(ETH_P_802_2))
 475                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
 476                         len = skb->len;
 477                         napi_gro_receive(&card->napi, skb);
 478                         break;
 479                 case QETH_HEADER_TYPE_OSN:
 480                         if (card->info.type == QETH_CARD_TYPE_OSN) {
 481                                 skb_push(skb, sizeof(struct qeth_hdr));
 482                                 skb_copy_to_linear_data(skb, hdr,
 483                                                 sizeof(struct qeth_hdr));
 484                                 len = skb->len;
 485                                 card->osn_info.data_cb(skb);
 486                                 break;
 487                         }
 488                         /* else unknown */
 489                 default:
 490                         dev_kfree_skb_any(skb);
 491                         QETH_CARD_TEXT(card, 3, "inbunkno");
 492                         QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
 493                         continue;
 494                 }
 495                 work_done++;
 496                 budget--;
 497                 card->stats.rx_packets++;
 498                 card->stats.rx_bytes += len;
 499         }
 500         return work_done;
 501 }
 502
 503 static int qeth_l2_request_initial_mac(struct qeth_card *card)
 504 {
 505         int rc = 0;
 506         char vendor_pre[] = {0x02, 0x00, 0x00};
 507
 508         QETH_DBF_TEXT(SETUP, 2, "doL2init");
 509         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
 510
 511         if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
 512                 rc = qeth_query_setadapterparms(card);
 513                 if (rc) {
 514                         QETH_DBF_MESSAGE(2, "could not query adapter "
 515                                 "parameters on device %s: x%x\n",
 516                                 CARD_BUS_ID(card), rc);
 517                 }
 518         }
 519
 520         if (card->info.type == QETH_CARD_TYPE_IQD ||
 521             card->info.type == QETH_CARD_TYPE_OSM ||
 522             card->info.type == QETH_CARD_TYPE_OSX ||
 523             card->info.guestlan) {
 524                 rc = qeth_setadpparms_change_macaddr(card);
 525                 if (rc) {
 526                         QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
 527                                 "device %s: x%x\n", CARD_BUS_ID(card), rc);
 528                         QETH_DBF_TEXT_(SETUP, 2, "1err%04x", rc);
 529                         return rc;
 530                 }
 531                 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN);
 532         } else {
 533                 eth_random_addr(card->dev->dev_addr);
 534                 memcpy(card->dev->dev_addr, vendor_pre, 3);
 535         }
 536         return 0;
 537 }
 538
 539 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 540 {
 541         struct sockaddr *addr = p;
 542         struct qeth_card *card = dev->ml_priv;
 543         int rc = 0;
 544
 545         QETH_CARD_TEXT(card, 3, "setmac");
 546
 547         if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
 548                 QETH_CARD_TEXT(card, 3, "setmcINV");
 549                 return -EOPNOTSUPP;
 550         }
 551
 552         if (card->info.type == QETH_CARD_TYPE_OSN ||
 553             card->info.type == QETH_CARD_TYPE_OSM ||
 554             card->info.type == QETH_CARD_TYPE_OSX) {
 555                 QETH_CARD_TEXT(card, 3, "setmcTYP");
 556                 return -EOPNOTSUPP;
 557         }
 558         QETH_CARD_HEX(card, 3, addr->sa_data, OSA_ADDR_LEN);
 559         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 560                 QETH_CARD_TEXT(card, 3, "setmcREC");
 561                 return -ERESTARTSYS;
 562         }
 563         rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
 564         if (!rc || (rc == -ENOENT))
 565                 rc = qeth_l2_send_setmac(card, addr->sa_data);
 566         return rc ? -EINVAL : 0;
 567 }
 568
 569 static void qeth_promisc_to_bridge(struct qeth_card *card)
 570 {
 571         struct net_device *dev = card->dev;
 572         enum qeth_ipa_promisc_modes promisc_mode;
 573         int role;
 574         int rc;
 575
 576         QETH_CARD_TEXT(card, 3, "pmisc2br");
 577
 578         if (!card->options.sbp.reflect_promisc)
 579                 return;
 580         promisc_mode = (dev->flags & IFF_PROMISC) ? SET_PROMISC_MODE_ON
 581                                                 : SET_PROMISC_MODE_OFF;
 582         if (promisc_mode == card->info.promisc_mode)
 583                 return;
 584
 585         if (promisc_mode == SET_PROMISC_MODE_ON) {
 586                 if (card->options.sbp.reflect_promisc_primary)
 587                         role = QETH_SBP_ROLE_PRIMARY;
 588                 else
 589                         role = QETH_SBP_ROLE_SECONDARY;
 590         } else
 591                 role = QETH_SBP_ROLE_NONE;
 592
 593         rc = qeth_bridgeport_setrole(card, role);
 594         QETH_DBF_TEXT_(SETUP, 2, "bpm%c%04x",
 595                         (promisc_mode == SET_PROMISC_MODE_ON) ? '+' : '-', rc);
 596         if (!rc) {
 597                 card->options.sbp.role = role;
 598                 card->info.promisc_mode = promisc_mode;
 599         }
 600
 601 }
 602 /* New MAC address is added to the hash table and marked to be written on card
 603  * only if there is not in the hash table storage already
 604  *
 605 */
 606 static  void
 607 qeth_l2_add_mac(struct qeth_card *card, struct netdev_hw_addr *ha, u8 is_uc)
 608 {
 609         struct qeth_mac *mac;
 610
 611         hash_for_each_possible(card->mac_htable, mac, hnode,
 612                         qeth_l2_mac_hash(ha->addr)) {
 613                 if (is_uc == mac->is_uc &&
 614                     !memcmp(ha->addr, mac->mac_addr, OSA_ADDR_LEN)) {
 615                         mac->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
 616                         return;
 617                 }
 618         }
 619
 620         mac = kzalloc(sizeof(struct qeth_mac), GFP_ATOMIC);
 621
 622         if (!mac)
 623                 return;
 624
 625         memcpy(mac->mac_addr, ha->addr, OSA_ADDR_LEN);
 626         mac->is_uc = is_uc;
 627         mac->disp_flag = QETH_DISP_ADDR_ADD;
 628
 629         hash_add(card->mac_htable, &mac->hnode,
 630                         qeth_l2_mac_hash(mac->mac_addr));
 631
 632 }
 633
 634 static void qeth_l2_set_rx_mode(struct net_device *dev)
 635 {
 636         struct qeth_card *card = dev->ml_priv;
 637         struct netdev_hw_addr *ha;
 638         struct qeth_mac *mac;
 639         struct hlist_node *tmp;
 640         int i;
 641         int rc;
 642
 643         if (card->info.type == QETH_CARD_TYPE_OSN)
 644                 return;
 645
 646         QETH_CARD_TEXT(card, 3, "setmulti");
 647         if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
 648             (card->state != CARD_STATE_UP))
 649                 return;
 650
 651         spin_lock_bh(&card->mclock);
 652
 653         netdev_for_each_mc_addr(ha, dev)
 654                 qeth_l2_add_mac(card, ha, 0);
 655
 656         netdev_for_each_uc_addr(ha, dev)
 657                 qeth_l2_add_mac(card, ha, 1);
 658
 659         hash_for_each_safe(card->mac_htable, i, tmp, mac, hnode) {
 660                 if (mac->disp_flag == QETH_DISP_ADDR_DELETE) {
 661                         qeth_l2_remove_mac(card, mac);
 662                         hash_del(&mac->hnode);
 663                         kfree(mac);
 664
 665                 } else if (mac->disp_flag == QETH_DISP_ADDR_ADD) {
 666                         rc = qeth_l2_write_mac(card, mac);
 667                         if (rc) {
 668                                 hash_del(&mac->hnode);
 669                                 kfree(mac);
 670                         } else
 671                                 mac->disp_flag = QETH_DISP_ADDR_DELETE;
 672                 } else
 673                         mac->disp_flag = QETH_DISP_ADDR_DELETE;
 674         }
 675
 676         spin_unlock_bh(&card->mclock);
 677
 678         if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
 679                 qeth_setadp_promisc_mode(card);
 680         else
 681                 qeth_promisc_to_bridge(card);
 682 }
 683
 684 static netdev_tx_t qeth_l2_hard_start_xmit(struct sk_buff *skb,
 685                                            struct net_device *dev)
 686 {
 687         int rc;
 688         struct qeth_hdr *hdr = NULL;
 689         int elements = 0;
 690         struct qeth_card *card = dev->ml_priv;
 691         struct sk_buff *new_skb = skb;
 692         int cast_type = qeth_l2_get_cast_type(card, skb);
 693         struct qeth_qdio_out_q *queue;
 694         int tx_bytes = skb->len;
 695         int data_offset = -1;
 696         int elements_needed = 0;
 697         int hd_len = 0;
 698         int nr_frags;
 699
 700         if (card->qdio.do_prio_queueing || (cast_type &&
 701                                         card->info.is_multicast_different))
 702                 queue = card->qdio.out_qs[qeth_get_priority_queue(card, skb,
 703                                         qeth_get_ip_version(skb), cast_type)];
 704         else
 705                 queue = card->qdio.out_qs[card->qdio.default_out_queue];
 706
 707         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
 708                 card->stats.tx_carrier_errors++;
 709                 goto tx_drop;
 710         }
 711
 712         if ((card->info.type == QETH_CARD_TYPE_OSN) &&
 713             (skb->protocol == htons(ETH_P_IPV6)))
 714                 goto tx_drop;
 715
 716         if (card->options.performance_stats) {
 717                 card->perf_stats.outbound_cnt++;
 718                 card->perf_stats.outbound_start_time = qeth_get_micros();
 719         }
 720         netif_stop_queue(dev);
 721
 722         /* fix hardware limitation: as long as we do not have sbal
 723          * chaining we can not send long frag lists
 724          */
 725         if ((card->info.type != QETH_CARD_TYPE_IQD) &&
 726             !qeth_get_elements_no(card, new_skb, 0, 0)) {
 727                 int lin_rc = skb_linearize(new_skb);
 728
 729                 if (card->options.performance_stats) {
 730                         if (lin_rc)
 731                                 card->perf_stats.tx_linfail++;
 732                         else
 733                                 card->perf_stats.tx_lin++;
 734                 }
 735                 if (lin_rc)
 736                         goto tx_drop;
 737         }
 738
 739         if (card->info.type == QETH_CARD_TYPE_OSN)
 740                 hdr = (struct qeth_hdr *)skb->data;
 741         else {
 742                 if (card->info.type == QETH_CARD_TYPE_IQD) {
 743                         new_skb = skb;
 744                         data_offset = ETH_HLEN;
 745                         hd_len = ETH_HLEN;
 746                         hdr = kmem_cache_alloc(qeth_core_header_cache,
 747                                                 GFP_ATOMIC);
 748                         if (!hdr)
 749                                 goto tx_drop;
 750                         elements_needed++;
 751                         skb_reset_mac_header(new_skb);
 752                         qeth_l2_fill_header(card, hdr, new_skb, cast_type);
 753                         hdr->hdr.l2.pkt_length = new_skb->len;
 754                         memcpy(((char *)hdr) + sizeof(struct qeth_hdr),
 755                                 skb_mac_header(new_skb), ETH_HLEN);
 756                 } else {
 757                         /* create a clone with writeable headroom */
 758                         new_skb = skb_realloc_headroom(skb,
 759                                                 sizeof(struct qeth_hdr));
 760                         if (!new_skb)
 761                                 goto tx_drop;
 762                         hdr = (struct qeth_hdr *)skb_push(new_skb,
 763                                                 sizeof(struct qeth_hdr));
 764                         skb_set_mac_header(new_skb, sizeof(struct qeth_hdr));
 765                         qeth_l2_fill_header(card, hdr, new_skb, cast_type);
 766                         if (new_skb->ip_summed == CHECKSUM_PARTIAL)
 767                                 qeth_l2_hdr_csum(card, hdr, new_skb);
 768                 }
 769         }
 770
 771         elements = qeth_get_elements_no(card, new_skb, elements_needed,
 772                                         (data_offset > 0) ? data_offset : 0);
 773         if (!elements) {
 774                 if (data_offset >= 0)
 775                         kmem_cache_free(qeth_core_header_cache, hdr);
 776                 goto tx_drop;
 777         }
 778
 779         if (card->info.type != QETH_CARD_TYPE_IQD) {
 780                 if (qeth_hdr_chk_and_bounce(new_skb, &hdr,
 781                     sizeof(struct qeth_hdr_layer2)))
 782                         goto tx_drop;
 783                 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
 784                                          elements);
 785         } else
 786                 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
 787                                               data_offset, hd_len);
 788         if (!rc) {
 789                 card->stats.tx_packets++;
 790                 card->stats.tx_bytes += tx_bytes;
 791                 if (card->options.performance_stats) {
 792                         nr_frags = skb_shinfo(new_skb)->nr_frags;
 793                         if (nr_frags) {
 794                                 card->perf_stats.sg_skbs_sent++;
 795                                 /* nr_frags + skb->data */
 796                                 card->perf_stats.sg_frags_sent += nr_frags + 1;
 797                         }
 798                 }
 799                 if (new_skb != skb)
 800                         dev_kfree_skb_any(skb);
 801                 rc = NETDEV_TX_OK;
 802         } else {
 803                 if (data_offset >= 0)
 804                         kmem_cache_free(qeth_core_header_cache, hdr);
 805
 806                 if (rc == -EBUSY) {
 807                         if (new_skb != skb)
 808                                 dev_kfree_skb_any(new_skb);
 809                         return NETDEV_TX_BUSY;
 810                 } else
 811                         goto tx_drop;
 812         }
 813
 814         netif_wake_queue(dev);
 815         if (card->options.performance_stats)
 816                 card->perf_stats.outbound_time += qeth_get_micros() -
 817                         card->perf_stats.outbound_start_time;
 818         return rc;
 819
 820 tx_drop:
 821         card->stats.tx_dropped++;
 822         card->stats.tx_errors++;
 823         if ((new_skb != skb) && new_skb)
 824                 dev_kfree_skb_any(new_skb);
 825         dev_kfree_skb_any(skb);
 826         netif_wake_queue(dev);
 827         return NETDEV_TX_OK;
 828 }
 829
 830 static int __qeth_l2_open(struct net_device *dev)
 831 {
 832         struct qeth_card *card = dev->ml_priv;
 833         int rc = 0;
 834
 835         QETH_CARD_TEXT(card, 4, "qethopen");
 836         if (card->state == CARD_STATE_UP)
 837                 return rc;
 838         if (card->state != CARD_STATE_SOFTSETUP)
 839                 return -ENODEV;
 840
 841         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
 842              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
 843                 QETH_CARD_TEXT(card, 4, "nomacadr");
 844                 return -EPERM;
 845         }
 846         card->data.state = CH_STATE_UP;
 847         card->state = CARD_STATE_UP;
 848         netif_start_queue(dev);
 849
 850         if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) {
 851                 napi_enable(&card->napi);
 852                 napi_schedule(&card->napi);
 853         } else
 854                 rc = -EIO;
 855         return rc;
 856 }
 857
 858 static int qeth_l2_open(struct net_device *dev)
 859 {
 860         struct qeth_card *card = dev->ml_priv;
 861
 862         QETH_CARD_TEXT(card, 5, "qethope_");
 863         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 864                 QETH_CARD_TEXT(card, 3, "openREC");
 865                 return -ERESTARTSYS;
 866         }
 867         return __qeth_l2_open(dev);
 868 }
 869
 870 static int qeth_l2_stop(struct net_device *dev)
 871 {
 872         struct qeth_card *card = dev->ml_priv;
 873
 874         QETH_CARD_TEXT(card, 4, "qethstop");
 875         netif_tx_disable(dev);
 876         if (card->state == CARD_STATE_UP) {
 877                 card->state = CARD_STATE_SOFTSETUP;
 878                 napi_disable(&card->napi);
 879         }
 880         return 0;
 881 }
 882
 883 static const struct device_type qeth_l2_devtype = {
 884         .name = "qeth_layer2",
 885         .groups = qeth_l2_attr_groups,
 886 };
 887
 888 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 889 {
 890         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 891         int rc;
 892
 893         if (gdev->dev.type == &qeth_generic_devtype) {
 894                 rc = qeth_l2_create_device_attributes(&gdev->dev);
 895                 if (rc)
 896                         return rc;
 897         }
 898         INIT_LIST_HEAD(&card->vid_list);
 899         hash_init(card->mac_htable);
 900         card->options.layer2 = 1;
 901         card->info.hwtrap = 0;
 902         return 0;
 903 }
 904
 905 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
 906 {
 907         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
 908
 909         if (cgdev->dev.type == &qeth_generic_devtype)
 910                 qeth_l2_remove_device_attributes(&cgdev->dev);
 911         qeth_set_allowed_threads(card, 0, 1);
 912         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 913
 914         if (cgdev->state == CCWGROUP_ONLINE)
 915                 qeth_l2_set_offline(cgdev);
 916
 917         if (card->dev) {
 918                 netif_napi_del(&card->napi);
 919                 unregister_netdev(card->dev);
 920                 card->dev = NULL;
 921         }
 922         return;
 923 }
 924
 925 static const struct ethtool_ops qeth_l2_ethtool_ops = {
 926         .get_link = ethtool_op_get_link,
 927         .get_strings = qeth_core_get_strings,
 928         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 929         .get_sset_count = qeth_core_get_sset_count,
 930         .get_drvinfo = qeth_core_get_drvinfo,
 931         .get_link_ksettings = qeth_core_ethtool_get_link_ksettings,
 932 };
 933
 934 static const struct ethtool_ops qeth_l2_osn_ops = {
 935         .get_strings = qeth_core_get_strings,
 936         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 937         .get_sset_count = qeth_core_get_sset_count,
 938         .get_drvinfo = qeth_core_get_drvinfo,
 939 };
 940
 941 static const struct net_device_ops qeth_l2_netdev_ops = {
 942         .ndo_open               = qeth_l2_open,
 943         .ndo_stop               = qeth_l2_stop,
 944         .ndo_get_stats          = qeth_get_stats,
 945         .ndo_start_xmit         = qeth_l2_hard_start_xmit,
 946         .ndo_validate_addr      = eth_validate_addr,
 947         .ndo_set_rx_mode        = qeth_l2_set_rx_mode,
 948         .ndo_do_ioctl           = qeth_do_ioctl,
 949         .ndo_set_mac_address    = qeth_l2_set_mac_address,
 950         .ndo_change_mtu         = qeth_change_mtu,
 951         .ndo_vlan_rx_add_vid    = qeth_l2_vlan_rx_add_vid,
 952         .ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,
 953         .ndo_tx_timeout         = qeth_tx_timeout,
 954         .ndo_fix_features       = qeth_fix_features,
 955         .ndo_set_features       = qeth_set_features
 956 };
 957
 958 static int qeth_l2_setup_netdev(struct qeth_card *card)
 959 {
 960         switch (card->info.type) {
 961         case QETH_CARD_TYPE_IQD:
 962                 card->dev = alloc_netdev(0, "hsi%d", NET_NAME_UNKNOWN,
 963                                          ether_setup);
 964                 break;
 965         case QETH_CARD_TYPE_OSN:
 966                 card->dev = alloc_netdev(0, "osn%d", NET_NAME_UNKNOWN,
 967                                          ether_setup);
 968                 break;
 969         default:
 970                 card->dev = alloc_etherdev(0);
 971         }
 972
 973         if (!card->dev)
 974                 return -ENODEV;
 975
 976         card->dev->ml_priv = card;
 977         card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
 978         card->dev->mtu = card->info.initial_mtu;
 979         card->dev->min_mtu = 64;
 980         card->dev->max_mtu = ETH_MAX_MTU;
 981         card->dev->netdev_ops = &qeth_l2_netdev_ops;
 982         if (card->info.type == QETH_CARD_TYPE_OSN) {
 983                 card->dev->ethtool_ops = &qeth_l2_osn_ops;
 984                 card->dev->flags |= IFF_NOARP;
 985         } else {
 986                 card->dev->ethtool_ops = &qeth_l2_ethtool_ops;
 987         }
 988         card->dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
 989         if (card->info.type == QETH_CARD_TYPE_OSD && !card->info.guestlan) {
 990                 card->dev->hw_features = NETIF_F_SG;
 991                 card->dev->vlan_features = NETIF_F_SG;
 992                 /* OSA 3S and earlier has no RX/TX support */
 993                 if (qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM)) {
 994                         card->dev->hw_features |= NETIF_F_IP_CSUM;
 995                         card->dev->vlan_features |= NETIF_F_IP_CSUM;
 996                 }
 997                 if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM)) {
 998                         card->dev->hw_features |= NETIF_F_RXCSUM;
 999                         card->dev->vlan_features |= NETIF_F_RXCSUM;
1000                 }
1001         }
1002         card->info.broadcast_capable = 1;
1003         qeth_l2_request_initial_mac(card);
1004         card->dev->gso_max_size = (QETH_MAX_BUFFER_ELEMENTS(card) - 1) *
1005                                   PAGE_SIZE;
1006         SET_NETDEV_DEV(card->dev, &card->gdev->dev);
1007         netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT);
1008         netif_carrier_off(card->dev);
1009         return register_netdev(card->dev);
1010 }
1011
1012 static int qeth_l2_start_ipassists(struct qeth_card *card)
1013 {
1014         /* configure isolation level */
1015         if (qeth_set_access_ctrl_online(card, 0))
1016                 return -ENODEV;
1017         return 0;
1018 }
1019
1020 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
1021 {
1022         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1023         int rc = 0;
1024         enum qeth_card_states recover_flag;
1025
1026         mutex_lock(&card->discipline_mutex);
1027         mutex_lock(&card->conf_mutex);
1028         QETH_DBF_TEXT(SETUP, 2, "setonlin");
1029         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1030
1031         recover_flag = card->state;
1032         rc = qeth_core_hardsetup_card(card);
1033         if (rc) {
1034                 QETH_DBF_TEXT_(SETUP, 2, "2err%04x", rc);
1035                 rc = -ENODEV;
1036                 goto out_remove;
1037         }
1038         qeth_bridgeport_query_support(card);
1039         if (card->options.sbp.supported_funcs)
1040                 dev_info(&card->gdev->dev,
1041                 "The device represents a Bridge Capable Port\n");
1042         qeth_trace_features(card);
1043
1044         if (!card->dev && qeth_l2_setup_netdev(card)) {
1045                 rc = -ENODEV;
1046                 goto out_remove;
1047         }
1048
1049         if (card->info.type != QETH_CARD_TYPE_OSN)
1050                 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
1051
1052         if (qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP)) {
1053                 if (card->info.hwtrap &&
1054                     qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM))
1055                         card->info.hwtrap = 0;
1056         } else
1057                 card->info.hwtrap = 0;
1058
1059         qeth_l2_setup_bridgeport_attrs(card);
1060
1061         card->state = CARD_STATE_HARDSETUP;
1062         memset(&card->rx, 0, sizeof(struct qeth_rx));
1063         qeth_print_status_message(card);
1064
1065         /* softsetup */
1066         QETH_DBF_TEXT(SETUP, 2, "softsetp");
1067
1068         if ((card->info.type == QETH_CARD_TYPE_OSD) ||
1069             (card->info.type == QETH_CARD_TYPE_OSX)) {
1070                 rc = qeth_l2_start_ipassists(card);
1071                 if (rc)
1072                         goto out_remove;
1073         }
1074
1075         if (card->info.type != QETH_CARD_TYPE_OSN &&
1076             card->info.type != QETH_CARD_TYPE_OSM)
1077                 qeth_l2_process_vlans(card);
1078
1079         netif_tx_disable(card->dev);
1080
1081         rc = qeth_init_qdio_queues(card);
1082         if (rc) {
1083                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1084                 rc = -ENODEV;
1085                 goto out_remove;
1086         }
1087         card->state = CARD_STATE_SOFTSETUP;
1088         if (card->lan_online)
1089                 netif_carrier_on(card->dev);
1090         else
1091                 netif_carrier_off(card->dev);
1092
1093         qeth_set_allowed_threads(card, 0xffffffff, 0);
1094         if (recover_flag == CARD_STATE_RECOVER) {
1095                 if (recovery_mode &&
1096                     card->info.type != QETH_CARD_TYPE_OSN) {
1097                         __qeth_l2_open(card->dev);
1098                 } else {
1099                         rtnl_lock();
1100                         dev_open(card->dev);
1101                         rtnl_unlock();
1102                 }
1103                 /* this also sets saved unicast addresses */
1104                 qeth_l2_set_rx_mode(card->dev);
1105                 rtnl_lock();
1106                 qeth_recover_features(card->dev);
1107                 rtnl_unlock();
1108         }
1109         /* let user_space know that device is online */
1110         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1111         mutex_unlock(&card->conf_mutex);
1112         mutex_unlock(&card->discipline_mutex);
1113         return 0;
1114
1115 out_remove:
1116         qeth_l2_stop_card(card, 0);
1117         ccw_device_set_offline(CARD_DDEV(card));
1118         ccw_device_set_offline(CARD_WDEV(card));
1119         ccw_device_set_offline(CARD_RDEV(card));
1120         qdio_free(CARD_DDEV(card));
1121         if (recover_flag == CARD_STATE_RECOVER)
1122                 card->state = CARD_STATE_RECOVER;
1123         else
1124                 card->state = CARD_STATE_DOWN;
1125         mutex_unlock(&card->conf_mutex);
1126         mutex_unlock(&card->discipline_mutex);
1127         return rc;
1128 }
1129
1130 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1131 {
1132         return __qeth_l2_set_online(gdev, 0);
1133 }
1134
1135 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1136                                         int recovery_mode)
1137 {
1138         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1139         int rc = 0, rc2 = 0, rc3 = 0;
1140         enum qeth_card_states recover_flag;
1141
1142         mutex_lock(&card->discipline_mutex);
1143         mutex_lock(&card->conf_mutex);
1144         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1145         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1146
1147         if (card->dev && netif_carrier_ok(card->dev))
1148                 netif_carrier_off(card->dev);
1149         recover_flag = card->state;
1150         if ((!recovery_mode && card->info.hwtrap) || card->info.hwtrap == 2) {
1151                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1152                 card->info.hwtrap = 1;
1153         }
1154         qeth_l2_stop_card(card, recovery_mode);
1155         rc  = ccw_device_set_offline(CARD_DDEV(card));
1156         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1157         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1158         if (!rc)
1159                 rc = (rc2) ? rc2 : rc3;
1160         if (rc)
1161                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1162         qdio_free(CARD_DDEV(card));
1163         if (recover_flag == CARD_STATE_UP)
1164                 card->state = CARD_STATE_RECOVER;
1165         /* let user_space know that device is offline */
1166         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1167         mutex_unlock(&card->conf_mutex);
1168         mutex_unlock(&card->discipline_mutex);
1169         return 0;
1170 }
1171
1172 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1173 {
1174         return __qeth_l2_set_offline(cgdev, 0);
1175 }
1176
1177 static int qeth_l2_recover(void *ptr)
1178 {
1179         struct qeth_card *card;
1180         int rc = 0;
1181
1182         card = (struct qeth_card *) ptr;
1183         QETH_CARD_TEXT(card, 2, "recover1");
1184         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1185                 return 0;
1186         QETH_CARD_TEXT(card, 2, "recover2");
1187         dev_warn(&card->gdev->dev,
1188                 "A recovery process has been started for the device\n");
1189         qeth_set_recovery_task(card);
1190         __qeth_l2_set_offline(card->gdev, 1);
1191         rc = __qeth_l2_set_online(card->gdev, 1);
1192         if (!rc)
1193                 dev_info(&card->gdev->dev,
1194                         "Device successfully recovered!\n");
1195         else {
1196                 qeth_close_dev(card);
1197                 dev_warn(&card->gdev->dev, "The qeth device driver "
1198                                 "failed to recover an error on the device\n");
1199         }
1200         qeth_clear_recovery_task(card);
1201         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1202         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1203         return 0;
1204 }
1205
1206 static int __init qeth_l2_init(void)
1207 {
1208         pr_info("register layer 2 discipline\n");
1209         return 0;
1210 }
1211
1212 static void __exit qeth_l2_exit(void)
1213 {
1214         pr_info("unregister layer 2 discipline\n");
1215 }
1216
1217 static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev)
1218 {
1219         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1220
1221         if (card->dev)
1222                 netif_device_detach(card->dev);
1223         qeth_set_allowed_threads(card, 0, 1);
1224         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1225         if (gdev->state == CCWGROUP_OFFLINE)
1226                 return 0;
1227         if (card->state == CARD_STATE_UP) {
1228                 if (card->info.hwtrap)
1229                         qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1230                 __qeth_l2_set_offline(card->gdev, 1);
1231         } else
1232                 __qeth_l2_set_offline(card->gdev, 0);
1233         return 0;
1234 }
1235
1236 static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
1237 {
1238         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1239         int rc = 0;
1240
1241         if (gdev->state == CCWGROUP_OFFLINE)
1242                 goto out;
1243
1244         if (card->state == CARD_STATE_RECOVER) {
1245                 rc = __qeth_l2_set_online(card->gdev, 1);
1246                 if (rc) {
1247                         rtnl_lock();
1248                         dev_close(card->dev);
1249                         rtnl_unlock();
1250                 }
1251         } else
1252                 rc = __qeth_l2_set_online(card->gdev, 0);
1253 out:
1254         qeth_set_allowed_threads(card, 0xffffffff, 0);
1255         if (card->dev)
1256                 netif_device_attach(card->dev);
1257         if (rc)
1258                 dev_warn(&card->gdev->dev, "The qeth device driver "
1259                         "failed to recover an error on the device\n");
1260         return rc;
1261 }
1262
1263 /* Returns zero if the command is successfully "consumed" */
1264 static int qeth_l2_control_event(struct qeth_card *card,
1265                                         struct qeth_ipa_cmd *cmd)
1266 {
1267         switch (cmd->hdr.command) {
1268         case IPA_CMD_SETBRIDGEPORT_OSA:
1269         case IPA_CMD_SETBRIDGEPORT_IQD:
1270                 if (cmd->data.sbp.hdr.command_code ==
1271                                 IPA_SBP_BRIDGE_PORT_STATE_CHANGE) {
1272                         qeth_bridge_state_change(card, cmd);
1273                         return 0;
1274                 } else
1275                         return 1;
1276         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
1277                 qeth_bridge_host_event(card, cmd);
1278                 return 0;
1279         default:
1280                 return 1;
1281         }
1282 }
1283
1284 struct qeth_discipline qeth_l2_discipline = {
1285         .devtype = &qeth_l2_devtype,
1286         .start_poll = qeth_qdio_start_poll,
1287         .input_handler = (qdio_handler_t *) qeth_qdio_input_handler,
1288         .output_handler = (qdio_handler_t *) qeth_qdio_output_handler,
1289         .process_rx_buffer = qeth_l2_process_inbound_buffer,
1290         .recover = qeth_l2_recover,
1291         .setup = qeth_l2_probe_device,
1292         .remove = qeth_l2_remove_device,
1293         .set_online = qeth_l2_set_online,
1294         .set_offline = qeth_l2_set_offline,
1295         .freeze = qeth_l2_pm_suspend,
1296         .thaw = qeth_l2_pm_resume,
1297         .restore = qeth_l2_pm_resume,
1298         .do_ioctl = NULL,
1299         .control_event_handler = qeth_l2_control_event,
1300 };
1301 EXPORT_SYMBOL_GPL(qeth_l2_discipline);
1302
1303 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1304                            struct qeth_cmd_buffer *iob)
1305 {
1306         unsigned long flags;
1307         int rc = 0;
1308
1309         QETH_CARD_TEXT(card, 5, "osndctrd");
1310
1311         wait_event(card->wait_q,
1312                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1313         qeth_prepare_control_data(card, len, iob);
1314         QETH_CARD_TEXT(card, 6, "osnoirqp");
1315         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1316         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1317                               (addr_t) iob, 0, 0);
1318         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1319         if (rc) {
1320                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1321                            "ccw_device_start rc = %i\n", rc);
1322                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1323                 qeth_release_buffer(iob->channel, iob);
1324                 atomic_set(&card->write.irq_pending, 0);
1325                 wake_up(&card->wait_q);
1326         }
1327         return rc;
1328 }
1329
1330 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1331                         struct qeth_cmd_buffer *iob, int data_len)
1332 {
1333         u16 s1, s2;
1334
1335         QETH_CARD_TEXT(card, 4, "osndipa");
1336
1337         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1338         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1339         s2 = (u16)data_len;
1340         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1341         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1342         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1343         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1344         return qeth_osn_send_control_data(card, s1, iob);
1345 }
1346
1347 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1348 {
1349         struct qeth_cmd_buffer *iob;
1350         struct qeth_card *card;
1351         int rc;
1352
1353         if (!dev)
1354                 return -ENODEV;
1355         card = dev->ml_priv;
1356         if (!card)
1357                 return -ENODEV;
1358         QETH_CARD_TEXT(card, 2, "osnsdmc");
1359         if (!qeth_card_hw_is_reachable(card))
1360                 return -ENODEV;
1361         iob = qeth_wait_for_buffer(&card->write);
1362         memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1363         rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1364         return rc;
1365 }
1366 EXPORT_SYMBOL(qeth_osn_assist);
1367
1368 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1369                   int (*assist_cb)(struct net_device *, void *),
1370                   int (*data_cb)(struct sk_buff *))
1371 {
1372         struct qeth_card *card;
1373
1374         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1375         if (*dev == NULL)
1376                 return -ENODEV;
1377         card = (*dev)->ml_priv;
1378         if (!card)
1379                 return -ENODEV;
1380         QETH_CARD_TEXT(card, 2, "osnreg");
1381         if ((assist_cb == NULL) || (data_cb == NULL))
1382                 return -EINVAL;
1383         card->osn_info.assist_cb = assist_cb;
1384         card->osn_info.data_cb = data_cb;
1385         return 0;
1386 }
1387 EXPORT_SYMBOL(qeth_osn_register);
1388
1389 void qeth_osn_deregister(struct net_device *dev)
1390 {
1391         struct qeth_card *card;
1392
1393         if (!dev)
1394                 return;
1395         card = dev->ml_priv;
1396         if (!card)
1397                 return;
1398         QETH_CARD_TEXT(card, 2, "osndereg");
1399         card->osn_info.assist_cb = NULL;
1400         card->osn_info.data_cb = NULL;
1401         return;
1402 }
1403 EXPORT_SYMBOL(qeth_osn_deregister);
1404
1405 /* SETBRIDGEPORT support, async notifications */
1406
1407 enum qeth_an_event_type {anev_reg_unreg, anev_abort, anev_reset};
1408
1409 /**
1410  * qeth_bridge_emit_host_event() - bridgeport address change notification
1411  * @card:  qeth_card structure pointer, for udev events.
1412  * @evtype:  "normal" register/unregister, or abort, or reset. For abort
1413  *            and reset token and addr_lnid are unused and may be NULL.
1414  * @code:  event bitmask: high order bit 0x80 value 1 means removal of an
1415  *                        object, 0 - addition of an object.
1416  *                        0x01 - VLAN, 0x02 - MAC, 0x03 - VLAN and MAC.
1417  * @token: "network token" structure identifying physical address of the port.
1418  * @addr_lnid: pointer to structure with MAC address and VLAN ID.
1419  *
1420  * This function is called when registrations and deregistrations are
1421  * reported by the hardware, and also when notifications are enabled -
1422  * for all currently registered addresses.
1423  */
1424 static void qeth_bridge_emit_host_event(struct qeth_card *card,
1425         enum qeth_an_event_type evtype,
1426         u8 code, struct net_if_token *token, struct mac_addr_lnid *addr_lnid)
1427 {
1428         char str[7][32];
1429         char *env[8];
1430         int i = 0;
1431
1432         switch (evtype) {
1433         case anev_reg_unreg:
1434                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=%s",
1435                                 (code & IPA_ADDR_CHANGE_CODE_REMOVAL)
1436                                 ? "deregister" : "register");
1437                 env[i] = str[i]; i++;
1438                 if (code & IPA_ADDR_CHANGE_CODE_VLANID) {
1439                         snprintf(str[i], sizeof(str[i]), "VLAN=%d",
1440                                 addr_lnid->lnid);
1441                         env[i] = str[i]; i++;
1442                 }
1443                 if (code & IPA_ADDR_CHANGE_CODE_MACADDR) {
1444                         snprintf(str[i], sizeof(str[i]), "MAC=%pM",
1445                                 addr_lnid->mac);
1446                         env[i] = str[i]; i++;
1447                 }
1448                 snprintf(str[i], sizeof(str[i]), "NTOK_BUSID=%x.%x.%04x",
1449                         token->cssid, token->ssid, token->devnum);
1450                 env[i] = str[i]; i++;
1451                 snprintf(str[i], sizeof(str[i]), "NTOK_IID=%02x", token->iid);
1452                 env[i] = str[i]; i++;
1453                 snprintf(str[i], sizeof(str[i]), "NTOK_CHPID=%02x",
1454                                 token->chpid);
1455                 env[i] = str[i]; i++;
1456                 snprintf(str[i], sizeof(str[i]), "NTOK_CHID=%04x", token->chid);
1457                 env[i] = str[i]; i++;
1458                 break;
1459         case anev_abort:
1460                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=abort");
1461                 env[i] = str[i]; i++;
1462                 break;
1463         case anev_reset:
1464                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=reset");
1465                 env[i] = str[i]; i++;
1466                 break;
1467         }
1468         env[i] = NULL;
1469         kobject_uevent_env(&card->gdev->dev.kobj, KOBJ_CHANGE, env);
1470 }
1471
1472 struct qeth_bridge_state_data {
1473         struct work_struct worker;
1474         struct qeth_card *card;
1475         struct qeth_sbp_state_change qports;
1476 };
1477
1478 static void qeth_bridge_state_change_worker(struct work_struct *work)
1479 {
1480         struct qeth_bridge_state_data *data =
1481                 container_of(work, struct qeth_bridge_state_data, worker);
1482         /* We are only interested in the first entry - local port */
1483         struct qeth_sbp_port_entry *entry = &data->qports.entry[0];
1484         char env_locrem[32];
1485         char env_role[32];
1486         char env_state[32];
1487         char *env[] = {
1488                 env_locrem,
1489                 env_role,
1490                 env_state,
1491                 NULL
1492         };
1493
1494         /* Role should not change by itself, but if it did, */
1495         /* information from the hardware is authoritative.  */
1496         mutex_lock(&data->card->conf_mutex);
1497         data->card->options.sbp.role = entry->role;
1498         mutex_unlock(&data->card->conf_mutex);
1499
1500         snprintf(env_locrem, sizeof(env_locrem), "BRIDGEPORT=statechange");
1501         snprintf(env_role, sizeof(env_role), "ROLE=%s",
1502                 (entry->role == QETH_SBP_ROLE_NONE) ? "none" :
1503                 (entry->role == QETH_SBP_ROLE_PRIMARY) ? "primary" :
1504                 (entry->role == QETH_SBP_ROLE_SECONDARY) ? "secondary" :
1505                 "<INVALID>");
1506         snprintf(env_state, sizeof(env_state), "STATE=%s",
1507                 (entry->state == QETH_SBP_STATE_INACTIVE) ? "inactive" :
1508                 (entry->state == QETH_SBP_STATE_STANDBY) ? "standby" :
1509                 (entry->state == QETH_SBP_STATE_ACTIVE) ? "active" :
1510                 "<INVALID>");
1511         kobject_uevent_env(&data->card->gdev->dev.kobj,
1512                                 KOBJ_CHANGE, env);
1513         kfree(data);
1514 }
1515
1516 static void qeth_bridge_state_change(struct qeth_card *card,
1517                                         struct qeth_ipa_cmd *cmd)
1518 {
1519         struct qeth_sbp_state_change *qports =
1520                  &cmd->data.sbp.data.state_change;
1521         struct qeth_bridge_state_data *data;
1522         int extrasize;
1523
1524         QETH_CARD_TEXT(card, 2, "brstchng");
1525         if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1526                 QETH_CARD_TEXT_(card, 2, "BPsz%04x", qports->entry_length);
1527                 return;
1528         }
1529         extrasize = sizeof(struct qeth_sbp_port_entry) * qports->num_entries;
1530         data = kzalloc(sizeof(struct qeth_bridge_state_data) + extrasize,
1531                 GFP_ATOMIC);
1532         if (!data) {
1533                 QETH_CARD_TEXT(card, 2, "BPSalloc");
1534                 return;
1535         }
1536         INIT_WORK(&data->worker, qeth_bridge_state_change_worker);
1537         data->card = card;
1538         memcpy(&data->qports, qports,
1539                         sizeof(struct qeth_sbp_state_change) + extrasize);
1540         queue_work(qeth_wq, &data->worker);
1541 }
1542
1543 struct qeth_bridge_host_data {
1544         struct work_struct worker;
1545         struct qeth_card *card;
1546         struct qeth_ipacmd_addr_change hostevs;
1547 };
1548
1549 static void qeth_bridge_host_event_worker(struct work_struct *work)
1550 {
1551         struct qeth_bridge_host_data *data =
1552                 container_of(work, struct qeth_bridge_host_data, worker);
1553         int i;
1554
1555         if (data->hostevs.lost_event_mask) {
1556                 dev_info(&data->card->gdev->dev,
1557 "Address notification from the Bridge Port stopped %s (%s)\n",
1558                         data->card->dev->name,
1559                         (data->hostevs.lost_event_mask == 0x01)
1560                         ? "Overflow"
1561                         : (data->hostevs.lost_event_mask == 0x02)
1562                         ? "Bridge port state change"
1563                         : "Unknown reason");
1564                 mutex_lock(&data->card->conf_mutex);
1565                 data->card->options.sbp.hostnotification = 0;
1566                 mutex_unlock(&data->card->conf_mutex);
1567                 qeth_bridge_emit_host_event(data->card, anev_abort,
1568                         0, NULL, NULL);
1569         } else
1570                 for (i = 0; i < data->hostevs.num_entries; i++) {
1571                         struct qeth_ipacmd_addr_change_entry *entry =
1572                                         &data->hostevs.entry[i];
1573                         qeth_bridge_emit_host_event(data->card,
1574                                         anev_reg_unreg,
1575                                         entry->change_code,
1576                                         &entry->token, &entry->addr_lnid);
1577                 }
1578         kfree(data);
1579 }
1580
1581 static void qeth_bridge_host_event(struct qeth_card *card,
1582                                         struct qeth_ipa_cmd *cmd)
1583 {
1584         struct qeth_ipacmd_addr_change *hostevs =
1585                  &cmd->data.addrchange;
1586         struct qeth_bridge_host_data *data;
1587         int extrasize;
1588
1589         QETH_CARD_TEXT(card, 2, "brhostev");
1590         if (cmd->hdr.return_code != 0x0000) {
1591                 if (cmd->hdr.return_code == 0x0010) {
1592                         if (hostevs->lost_event_mask == 0x00)
1593                                 hostevs->lost_event_mask = 0xff;
1594                 } else {
1595                         QETH_CARD_TEXT_(card, 2, "BPHe%04x",
1596                                 cmd->hdr.return_code);
1597                         return;
1598                 }
1599         }
1600         extrasize = sizeof(struct qeth_ipacmd_addr_change_entry) *
1601                                                 hostevs->num_entries;
1602         data = kzalloc(sizeof(struct qeth_bridge_host_data) + extrasize,
1603                 GFP_ATOMIC);
1604         if (!data) {
1605                 QETH_CARD_TEXT(card, 2, "BPHalloc");
1606                 return;
1607         }
1608         INIT_WORK(&data->worker, qeth_bridge_host_event_worker);
1609         data->card = card;
1610         memcpy(&data->hostevs, hostevs,
1611                         sizeof(struct qeth_ipacmd_addr_change) + extrasize);
1612         queue_work(qeth_wq, &data->worker);
1613 }
1614
1615 /* SETBRIDGEPORT support; sending commands */
1616
1617 struct _qeth_sbp_cbctl {
1618         u16 ipa_rc;
1619         u16 cmd_rc;
1620         union {
1621                 u32 supported;
1622                 struct {
1623                         enum qeth_sbp_roles *role;
1624                         enum qeth_sbp_states *state;
1625                 } qports;
1626         } data;
1627 };
1628
1629 /**
1630  * qeth_bridgeport_makerc() - derive "traditional" error from hardware codes.
1631  * @card:                     qeth_card structure pointer, for debug messages.
1632  * @cbctl:                    state structure with hardware return codes.
1633  * @setcmd:                   IPA command code
1634  *
1635  * Returns negative errno-compatible error indication or 0 on success.
1636  */
1637 static int qeth_bridgeport_makerc(struct qeth_card *card,
1638         struct _qeth_sbp_cbctl *cbctl, enum qeth_ipa_sbp_cmd setcmd)
1639 {
1640         int rc;
1641         int is_iqd = (card->info.type == QETH_CARD_TYPE_IQD);
1642
1643         if ((is_iqd && (cbctl->ipa_rc == IPA_RC_SUCCESS)) ||
1644             (!is_iqd && (cbctl->ipa_rc == cbctl->cmd_rc)))
1645                 switch (cbctl->cmd_rc) {
1646                 case 0x0000:
1647                         rc = 0;
1648                         break;
1649                 case 0x2B04:
1650                 case 0x0004:
1651                         rc = -EOPNOTSUPP;
1652                         break;
1653                 case 0x2B0C:
1654                 case 0x000C: /* Not configured as bridge Port */
1655                         rc = -ENODEV; /* maybe not the best code here? */
1656                         dev_err(&card->gdev->dev,
1657         "The device is not configured as a Bridge Port\n");
1658                         break;
1659                 case 0x2B10:
1660                 case 0x0010: /* OS mismatch */
1661                         rc = -EPERM;
1662                         dev_err(&card->gdev->dev,
1663         "A Bridge Port is already configured by a different operating system\n");
1664                         break;
1665                 case 0x2B14:
1666                 case 0x0014: /* Another device is Primary */
1667                         switch (setcmd) {
1668                         case IPA_SBP_SET_PRIMARY_BRIDGE_PORT:
1669                                 rc = -EEXIST;
1670                                 dev_err(&card->gdev->dev,
1671         "The LAN already has a primary Bridge Port\n");
1672                                 break;
1673                         case IPA_SBP_SET_SECONDARY_BRIDGE_PORT:
1674                                 rc = -EBUSY;
1675                                 dev_err(&card->gdev->dev,
1676         "The device is already a primary Bridge Port\n");
1677                                 break;
1678                         default:
1679                                 rc = -EIO;
1680                         }
1681                         break;
1682                 case 0x2B18:
1683                 case 0x0018: /* This device is currently Secondary */
1684                         rc = -EBUSY;
1685                         dev_err(&card->gdev->dev,
1686         "The device is already a secondary Bridge Port\n");
1687                         break;
1688                 case 0x2B1C:
1689                 case 0x001C: /* Limit for Secondary devices reached */
1690                         rc = -EEXIST;
1691                         dev_err(&card->gdev->dev,
1692         "The LAN cannot have more secondary Bridge Ports\n");
1693                         break;
1694                 case 0x2B24:
1695                 case 0x0024: /* This device is currently Primary */
1696                         rc = -EBUSY;
1697                         dev_err(&card->gdev->dev,
1698         "The device is already a primary Bridge Port\n");
1699                         break;
1700                 case 0x2B20:
1701                 case 0x0020: /* Not authorized by zManager */
1702                         rc = -EACCES;
1703                         dev_err(&card->gdev->dev,
1704         "The device is not authorized to be a Bridge Port\n");
1705                         break;
1706                 default:
1707                         rc = -EIO;
1708                 }
1709         else
1710                 switch (cbctl->ipa_rc) {
1711                 case IPA_RC_NOTSUPP:
1712                         rc = -EOPNOTSUPP;
1713                         break;
1714                 case IPA_RC_UNSUPPORTED_COMMAND:
1715                         rc = -EOPNOTSUPP;
1716                         break;
1717                 default:
1718                         rc = -EIO;
1719                 }
1720
1721         if (rc) {
1722                 QETH_CARD_TEXT_(card, 2, "SBPi%04x", cbctl->ipa_rc);
1723                 QETH_CARD_TEXT_(card, 2, "SBPc%04x", cbctl->cmd_rc);
1724         }
1725         return rc;
1726 }
1727
1728 static inline int ipa_cmd_sbp(struct qeth_card *card)
1729 {
1730         return (card->info.type == QETH_CARD_TYPE_IQD) ?
1731                 IPA_CMD_SETBRIDGEPORT_IQD :
1732                 IPA_CMD_SETBRIDGEPORT_OSA;
1733 }
1734
1735 static int qeth_bridgeport_query_support_cb(struct qeth_card *card,
1736         struct qeth_reply *reply, unsigned long data)
1737 {
1738         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1739         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1740         QETH_CARD_TEXT(card, 2, "brqsupcb");
1741         cbctl->ipa_rc = cmd->hdr.return_code;
1742         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1743         if ((cbctl->ipa_rc == 0) && (cbctl->cmd_rc == 0)) {
1744                 cbctl->data.supported =
1745                         cmd->data.sbp.data.query_cmds_supp.supported_cmds;
1746         } else {
1747                 cbctl->data.supported = 0;
1748         }
1749         return 0;
1750 }
1751
1752 /**
1753  * qeth_bridgeport_query_support() - store bitmask of supported subfunctions.
1754  * @card:                            qeth_card structure pointer.
1755  *
1756  * Sets bitmask of supported setbridgeport subfunctions in the qeth_card
1757  * strucutre: card->options.sbp.supported_funcs.
1758  */
1759 static void qeth_bridgeport_query_support(struct qeth_card *card)
1760 {
1761         struct qeth_cmd_buffer *iob;
1762         struct qeth_ipa_cmd *cmd;
1763         struct _qeth_sbp_cbctl cbctl;
1764
1765         QETH_CARD_TEXT(card, 2, "brqsuppo");
1766         iob = qeth_get_ipacmd_buffer(card, ipa_cmd_sbp(card), 0);
1767         if (!iob)
1768                 return;
1769         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
1770         cmd->data.sbp.hdr.cmdlength =
1771                 sizeof(struct qeth_ipacmd_sbp_hdr) +
1772                 sizeof(struct qeth_sbp_query_cmds_supp);
1773         cmd->data.sbp.hdr.command_code =
1774                 IPA_SBP_QUERY_COMMANDS_SUPPORTED;
1775         cmd->data.sbp.hdr.used_total = 1;
1776         cmd->data.sbp.hdr.seq_no = 1;
1777         if (qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_support_cb,
1778                                                         (void *)&cbctl) ||
1779             qeth_bridgeport_makerc(card, &cbctl,
1780                                         IPA_SBP_QUERY_COMMANDS_SUPPORTED)) {
1781                 /* non-zero makerc signifies failure, and produce messages */
1782                 card->options.sbp.role = QETH_SBP_ROLE_NONE;
1783                 return;
1784         }
1785         card->options.sbp.supported_funcs = cbctl.data.supported;
1786 }
1787
1788 static int qeth_bridgeport_query_ports_cb(struct qeth_card *card,
1789         struct qeth_reply *reply, unsigned long data)
1790 {
1791         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1792         struct qeth_sbp_query_ports *qports = &cmd->data.sbp.data.query_ports;
1793         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1794
1795         QETH_CARD_TEXT(card, 2, "brqprtcb");
1796         cbctl->ipa_rc = cmd->hdr.return_code;
1797         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1798         if ((cbctl->ipa_rc != 0) || (cbctl->cmd_rc != 0))
1799                 return 0;
1800         if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1801                 cbctl->cmd_rc = 0xffff;
1802                 QETH_CARD_TEXT_(card, 2, "SBPs%04x", qports->entry_length);
1803                 return 0;
1804         }
1805         /* first entry contains the state of the local port */
1806         if (qports->num_entries > 0) {
1807                 if (cbctl->data.qports.role)
1808                         *cbctl->data.qports.role = qports->entry[0].role;
1809                 if (cbctl->data.qports.state)
1810                         *cbctl->data.qports.state = qports->entry[0].state;
1811         }
1812         return 0;
1813 }
1814
1815 /**
1816  * qeth_bridgeport_query_ports() - query local bridgeport status.
1817  * @card:                          qeth_card structure pointer.
1818  * @role:   Role of the port: 0-none, 1-primary, 2-secondary.
1819  * @state:  State of the port: 0-inactive, 1-standby, 2-active.
1820  *
1821  * Returns negative errno-compatible error indication or 0 on success.
1822  *
1823  * 'role' and 'state' are not updated in case of hardware operation failure.
1824  */
1825 int qeth_bridgeport_query_ports(struct qeth_card *card,
1826         enum qeth_sbp_roles *role, enum qeth_sbp_states *state)
1827 {
1828         int rc = 0;
1829         struct qeth_cmd_buffer *iob;
1830         struct qeth_ipa_cmd *cmd;
1831         struct _qeth_sbp_cbctl cbctl = {
1832                 .data = {
1833                         .qports = {
1834                                 .role = role,
1835                                 .state = state,
1836                         },
1837                 },
1838         };
1839
1840         QETH_CARD_TEXT(card, 2, "brqports");
1841         if (!(card->options.sbp.supported_funcs & IPA_SBP_QUERY_BRIDGE_PORTS))
1842                 return -EOPNOTSUPP;
1843         iob = qeth_get_ipacmd_buffer(card, ipa_cmd_sbp(card), 0);
1844         if (!iob)
1845                 return -ENOMEM;
1846         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
1847         cmd->data.sbp.hdr.cmdlength =
1848                 sizeof(struct qeth_ipacmd_sbp_hdr);
1849         cmd->data.sbp.hdr.command_code =
1850                 IPA_SBP_QUERY_BRIDGE_PORTS;
1851         cmd->data.sbp.hdr.used_total = 1;
1852         cmd->data.sbp.hdr.seq_no = 1;
1853         rc = qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_ports_cb,
1854                                 (void *)&cbctl);
1855         if (rc < 0)
1856                 return rc;
1857         return qeth_bridgeport_makerc(card, &cbctl, IPA_SBP_QUERY_BRIDGE_PORTS);
1858 }
1859 EXPORT_SYMBOL_GPL(qeth_bridgeport_query_ports);
1860
1861 static int qeth_bridgeport_set_cb(struct qeth_card *card,
1862         struct qeth_reply *reply, unsigned long data)
1863 {
1864         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
1865         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1866         QETH_CARD_TEXT(card, 2, "brsetrcb");
1867         cbctl->ipa_rc = cmd->hdr.return_code;
1868         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1869         return 0;
1870 }
1871
1872 /**
1873  * qeth_bridgeport_setrole() - Assign primary role to the port.
1874  * @card:                      qeth_card structure pointer.
1875  * @role:                      Role to assign.
1876  *
1877  * Returns negative errno-compatible error indication or 0 on success.
1878  */
1879 int qeth_bridgeport_setrole(struct qeth_card *card, enum qeth_sbp_roles role)
1880 {
1881         int rc = 0;
1882         int cmdlength;
1883         struct qeth_cmd_buffer *iob;
1884         struct qeth_ipa_cmd *cmd;
1885         struct _qeth_sbp_cbctl cbctl;
1886         enum qeth_ipa_sbp_cmd setcmd;
1887
1888         QETH_CARD_TEXT(card, 2, "brsetrol");
1889         switch (role) {
1890         case QETH_SBP_ROLE_NONE:
1891                 setcmd = IPA_SBP_RESET_BRIDGE_PORT_ROLE;
1892                 cmdlength =  sizeof(struct qeth_ipacmd_sbp_hdr) +
1893                         sizeof(struct qeth_sbp_reset_role);
1894                 break;
1895         case QETH_SBP_ROLE_PRIMARY:
1896                 setcmd = IPA_SBP_SET_PRIMARY_BRIDGE_PORT;
1897                 cmdlength =  sizeof(struct qeth_ipacmd_sbp_hdr) +
1898                         sizeof(struct qeth_sbp_set_primary);
1899                 break;
1900         case QETH_SBP_ROLE_SECONDARY:
1901                 setcmd = IPA_SBP_SET_SECONDARY_BRIDGE_PORT;
1902                 cmdlength =  sizeof(struct qeth_ipacmd_sbp_hdr) +
1903                         sizeof(struct qeth_sbp_set_secondary);
1904                 break;
1905         default:
1906                 return -EINVAL;
1907         }
1908         if (!(card->options.sbp.supported_funcs & setcmd))
1909                 return -EOPNOTSUPP;
1910         iob = qeth_get_ipacmd_buffer(card, ipa_cmd_sbp(card), 0);
1911         if (!iob)
1912                 return -ENOMEM;
1913         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
1914         cmd->data.sbp.hdr.cmdlength = cmdlength;
1915         cmd->data.sbp.hdr.command_code = setcmd;
1916         cmd->data.sbp.hdr.used_total = 1;
1917         cmd->data.sbp.hdr.seq_no = 1;
1918         rc = qeth_send_ipa_cmd(card, iob, qeth_bridgeport_set_cb,
1919                                 (void *)&cbctl);
1920         if (rc < 0)
1921                 return rc;
1922         return qeth_bridgeport_makerc(card, &cbctl, setcmd);
1923 }
1924
1925 /**
1926  * qeth_anset_makerc() - derive "traditional" error from hardware codes.
1927  * @card:                     qeth_card structure pointer, for debug messages.
1928  *
1929  * Returns negative errno-compatible error indication or 0 on success.
1930  */
1931 static int qeth_anset_makerc(struct qeth_card *card, int pnso_rc, u16 response)
1932 {
1933         int rc;
1934
1935         if (pnso_rc == 0)
1936                 switch (response) {
1937                 case 0x0001:
1938                         rc = 0;
1939                         break;
1940                 case 0x0004:
1941                 case 0x0100:
1942                 case 0x0106:
1943                         rc = -EOPNOTSUPP;
1944                         dev_err(&card->gdev->dev,
1945                                 "Setting address notification failed\n");
1946                         break;
1947                 case 0x0107:
1948                         rc = -EAGAIN;
1949                         break;
1950                 default:
1951                         rc = -EIO;
1952                 }
1953         else
1954                 rc = -EIO;
1955
1956         if (rc) {
1957                 QETH_CARD_TEXT_(card, 2, "SBPp%04x", pnso_rc);
1958                 QETH_CARD_TEXT_(card, 2, "SBPr%04x", response);
1959         }
1960         return rc;
1961 }
1962
1963 static void qeth_bridgeport_an_set_cb(void *priv,
1964                 enum qdio_brinfo_entry_type type, void *entry)
1965 {
1966         struct qeth_card *card = (struct qeth_card *)priv;
1967         struct qdio_brinfo_entry_l2 *l2entry;
1968         u8 code;
1969
1970         if (type != l2_addr_lnid) {
1971                 WARN_ON_ONCE(1);
1972                 return;
1973         }
1974
1975         l2entry = (struct qdio_brinfo_entry_l2 *)entry;
1976         code = IPA_ADDR_CHANGE_CODE_MACADDR;
1977         if (l2entry->addr_lnid.lnid)
1978                 code |= IPA_ADDR_CHANGE_CODE_VLANID;
1979         qeth_bridge_emit_host_event(card, anev_reg_unreg, code,
1980                 (struct net_if_token *)&l2entry->nit,
1981                 (struct mac_addr_lnid *)&l2entry->addr_lnid);
1982 }
1983
1984 /**
1985  * qeth_bridgeport_an_set() - Enable or disable bridgeport address notification
1986  * @card:                     qeth_card structure pointer.
1987  * @enable:                   0 - disable, non-zero - enable notifications
1988  *
1989  * Returns negative errno-compatible error indication or 0 on success.
1990  *
1991  * On enable, emits a series of address notifications udev events for all
1992  * currently registered hosts.
1993  */
1994 int qeth_bridgeport_an_set(struct qeth_card *card, int enable)
1995 {
1996         int rc;
1997         u16 response;
1998         struct ccw_device *ddev;
1999         struct subchannel_id schid;
2000
2001         if (!card)
2002                 return -EINVAL;
2003         if (!card->options.sbp.supported_funcs)
2004                 return -EOPNOTSUPP;
2005         ddev = CARD_DDEV(card);
2006         ccw_device_get_schid(ddev, &schid);
2007
2008         if (enable) {
2009                 qeth_bridge_emit_host_event(card, anev_reset, 0, NULL, NULL);
2010                 rc = qdio_pnso_brinfo(schid, 1, &response,
2011                         qeth_bridgeport_an_set_cb, card);
2012         } else
2013                 rc = qdio_pnso_brinfo(schid, 0, &response, NULL, NULL);
2014         return qeth_anset_makerc(card, rc, response);
2015 }
2016 EXPORT_SYMBOL_GPL(qeth_bridgeport_an_set);
2017
2018 module_init(qeth_l2_init);
2019 module_exit(qeth_l2_exit);
2020 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
2021 MODULE_DESCRIPTION("qeth layer 2 discipline");
2022 MODULE_LICENSE("GPL");