drivers/s390/net/qeth_l2_main.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *    Copyright IBM Corp. 2007, 2009
   4  *    Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
   5  *               Frank Pavlic <fpavlic@de.ibm.com>,
   6  *               Thomas Spatzier <tspat@de.ibm.com>,
   7  *               Frank Blaschka <frank.blaschka@de.ibm.com>
   8  */
   9
  10 #define KMSG_COMPONENT "qeth"
  11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  12
  13 #include <linux/module.h>
  14 #include <linux/moduleparam.h>
  15 #include <linux/string.h>
  16 #include <linux/errno.h>
  17 #include <linux/kernel.h>
  18 #include <linux/slab.h>
  19 #include <linux/etherdevice.h>
  20 #include <linux/list.h>
  21 #include <linux/hash.h>
  22 #include <linux/hashtable.h>
  23 #include <asm/setup.h>
  24 #include "qeth_core.h"
  25 #include "qeth_l2.h"
  26
  27 static int qeth_l2_set_offline(struct ccwgroup_device *);
  28 static void qeth_bridgeport_query_support(struct qeth_card *card);
  29 static void qeth_bridge_state_change(struct qeth_card *card,
  30                                         struct qeth_ipa_cmd *cmd);
  31 static void qeth_bridge_host_event(struct qeth_card *card,
  32                                         struct qeth_ipa_cmd *cmd);
  33 static void qeth_l2_vnicc_set_defaults(struct qeth_card *card);
  34 static void qeth_l2_vnicc_init(struct qeth_card *card);
  35 static bool qeth_l2_vnicc_recover_timeout(struct qeth_card *card, u32 vnicc,
  36                                           u32 *timeout);
  37
  38 static int qeth_l2_setdelmac_makerc(struct qeth_card *card, u16 retcode)
  39 {
  40         int rc;
  41
  42         if (retcode)
  43                 QETH_CARD_TEXT_(card, 2, "err%04x", retcode);
  44         switch (retcode) {
  45         case IPA_RC_SUCCESS:
  46                 rc = 0;
  47                 break;
  48         case IPA_RC_L2_UNSUPPORTED_CMD:
  49                 rc = -EOPNOTSUPP;
  50                 break;
  51         case IPA_RC_L2_ADDR_TABLE_FULL:
  52                 rc = -ENOSPC;
  53                 break;
  54         case IPA_RC_L2_DUP_MAC:
  55         case IPA_RC_L2_DUP_LAYER3_MAC:
  56                 rc = -EEXIST;
  57                 break;
  58         case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
  59         case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
  60                 rc = -EPERM;
  61                 break;
  62         case IPA_RC_L2_MAC_NOT_FOUND:
  63                 rc = -ENOENT;
  64                 break;
  65         default:
  66                 rc = -EIO;
  67                 break;
  68         }
  69         return rc;
  70 }
  71
  72 static int qeth_l2_send_setdelmac_cb(struct qeth_card *card,
  73                                      struct qeth_reply *reply,
  74                                      unsigned long data)
  75 {
  76         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
  77
  78         return qeth_l2_setdelmac_makerc(card, cmd->hdr.return_code);
  79 }
  80
  81 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
  82                            enum qeth_ipa_cmds ipacmd)
  83 {
  84         struct qeth_ipa_cmd *cmd;
  85         struct qeth_cmd_buffer *iob;
  86
  87         QETH_CARD_TEXT(card, 2, "L2sdmac");
  88         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
  89         if (!iob)
  90                 return -ENOMEM;
  91         cmd = __ipa_cmd(iob);
  92         cmd->data.setdelmac.mac_length = ETH_ALEN;
  93         ether_addr_copy(cmd->data.setdelmac.mac, mac);
  94         return qeth_send_ipa_cmd(card, iob, qeth_l2_send_setdelmac_cb, NULL);
  95 }
  96
  97 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
  98 {
  99         int rc;
 100
 101         QETH_CARD_TEXT(card, 2, "L2Setmac");
 102         rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC);
 103         if (rc == 0) {
 104                 dev_info(&card->gdev->dev,
 105                          "MAC address %pM successfully registered\n", mac);
 106         } else {
 107                 switch (rc) {
 108                 case -EEXIST:
 109                         dev_warn(&card->gdev->dev,
 110                                 "MAC address %pM already exists\n", mac);
 111                         break;
 112                 case -EPERM:
 113                         dev_warn(&card->gdev->dev,
 114                                 "MAC address %pM is not authorized\n", mac);
 115                         break;
 116                 }
 117         }
 118         return rc;
 119 }
 120
 121 static int qeth_l2_write_mac(struct qeth_card *card, u8 *mac)
 122 {
 123         enum qeth_ipa_cmds cmd = is_multicast_ether_addr(mac) ?
 124                                         IPA_CMD_SETGMAC : IPA_CMD_SETVMAC;
 125         int rc;
 126
 127         QETH_CARD_TEXT(card, 2, "L2Wmac");
 128         rc = qeth_l2_send_setdelmac(card, mac, cmd);
 129         if (rc == -EEXIST)
 130                 QETH_DBF_MESSAGE(2, "MAC already registered on device %x\n",
 131                                  CARD_DEVID(card));
 132         else if (rc)
 133                 QETH_DBF_MESSAGE(2, "Failed to register MAC on device %x: %d\n",
 134                                  CARD_DEVID(card), rc);
 135         return rc;
 136 }
 137
 138 static int qeth_l2_remove_mac(struct qeth_card *card, u8 *mac)
 139 {
 140         enum qeth_ipa_cmds cmd = is_multicast_ether_addr(mac) ?
 141                                         IPA_CMD_DELGMAC : IPA_CMD_DELVMAC;
 142         int rc;
 143
 144         QETH_CARD_TEXT(card, 2, "L2Rmac");
 145         rc = qeth_l2_send_setdelmac(card, mac, cmd);
 146         if (rc)
 147                 QETH_DBF_MESSAGE(2, "Failed to delete MAC on device %u: %d\n",
 148                                  CARD_DEVID(card), rc);
 149         return rc;
 150 }
 151
 152 static void qeth_l2_del_all_macs(struct qeth_card *card)
 153 {
 154         struct qeth_mac *mac;
 155         struct hlist_node *tmp;
 156         int i;
 157
 158         spin_lock_bh(&card->mclock);
 159         hash_for_each_safe(card->mac_htable, i, tmp, mac, hnode) {
 160                 hash_del(&mac->hnode);
 161                 kfree(mac);
 162         }
 163         spin_unlock_bh(&card->mclock);
 164 }
 165
 166 static int qeth_l2_get_cast_type(struct qeth_card *card, struct sk_buff *skb)
 167 {
 168         if (card->info.type == QETH_CARD_TYPE_OSN)
 169                 return RTN_UNICAST;
 170         if (is_broadcast_ether_addr(skb->data))
 171                 return RTN_BROADCAST;
 172         if (is_multicast_ether_addr(skb->data))
 173                 return RTN_MULTICAST;
 174         return RTN_UNICAST;
 175 }
 176
 177 static void qeth_l2_fill_header(struct qeth_qdio_out_q *queue,
 178                                 struct qeth_hdr *hdr, struct sk_buff *skb,
 179                                 int ipv, int cast_type, unsigned int data_len)
 180 {
 181         struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
 182
 183         hdr->hdr.l2.pkt_length = data_len;
 184
 185         if (skb_is_gso(skb)) {
 186                 hdr->hdr.l2.id = QETH_HEADER_TYPE_L2_TSO;
 187         } else {
 188                 hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
 189                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
 190                         qeth_tx_csum(skb, &hdr->hdr.l2.flags[1], ipv);
 191                         QETH_TXQ_STAT_INC(queue, skbs_csum);
 192                 }
 193         }
 194
 195         /* set byte byte 3 to casting flags */
 196         if (cast_type == RTN_MULTICAST)
 197                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 198         else if (cast_type == RTN_BROADCAST)
 199                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 200         else
 201                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 202
 203         /* VSWITCH relies on the VLAN
 204          * information to be present in
 205          * the QDIO header */
 206         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
 207                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
 208                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
 209         }
 210 }
 211
 212 static int qeth_l2_setdelvlan_makerc(struct qeth_card *card, u16 retcode)
 213 {
 214         if (retcode)
 215                 QETH_CARD_TEXT_(card, 2, "err%04x", retcode);
 216
 217         switch (retcode) {
 218         case IPA_RC_SUCCESS:
 219                 return 0;
 220         case IPA_RC_L2_INVALID_VLAN_ID:
 221                 return -EINVAL;
 222         case IPA_RC_L2_DUP_VLAN_ID:
 223                 return -EEXIST;
 224         case IPA_RC_L2_VLAN_ID_NOT_FOUND:
 225                 return -ENOENT;
 226         case IPA_RC_L2_VLAN_ID_NOT_ALLOWED:
 227                 return -EPERM;
 228         default:
 229                 return -EIO;
 230         }
 231 }
 232
 233 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
 234                                       struct qeth_reply *reply,
 235                                       unsigned long data)
 236 {
 237         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
 238
 239         QETH_CARD_TEXT(card, 2, "L2sdvcb");
 240         if (cmd->hdr.return_code) {
 241                 QETH_DBF_MESSAGE(2, "Error in processing VLAN %u on device %x: %#x.\n",
 242                                  cmd->data.setdelvlan.vlan_id,
 243                                  CARD_DEVID(card), cmd->hdr.return_code);
 244                 QETH_CARD_TEXT_(card, 2, "L2VL%4x", cmd->hdr.command);
 245         }
 246         return qeth_l2_setdelvlan_makerc(card, cmd->hdr.return_code);
 247 }
 248
 249 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
 250                                    enum qeth_ipa_cmds ipacmd)
 251 {
 252         struct qeth_ipa_cmd *cmd;
 253         struct qeth_cmd_buffer *iob;
 254
 255         QETH_CARD_TEXT_(card, 4, "L2sdv%x", ipacmd);
 256         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 257         if (!iob)
 258                 return -ENOMEM;
 259         cmd = __ipa_cmd(iob);
 260         cmd->data.setdelvlan.vlan_id = i;
 261         return qeth_send_ipa_cmd(card, iob, qeth_l2_send_setdelvlan_cb, NULL);
 262 }
 263
 264 static int qeth_l2_vlan_rx_add_vid(struct net_device *dev,
 265                                    __be16 proto, u16 vid)
 266 {
 267         struct qeth_card *card = dev->ml_priv;
 268
 269         QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
 270         if (!vid)
 271                 return 0;
 272
 273         return qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
 274 }
 275
 276 static int qeth_l2_vlan_rx_kill_vid(struct net_device *dev,
 277                                     __be16 proto, u16 vid)
 278 {
 279         struct qeth_card *card = dev->ml_priv;
 280
 281         QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
 282         if (!vid)
 283                 return 0;
 284
 285         return qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 286 }
 287
 288 static void qeth_l2_stop_card(struct qeth_card *card)
 289 {
 290         QETH_DBF_TEXT(SETUP , 2, "stopcard");
 291         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 292
 293         qeth_set_allowed_threads(card, 0, 1);
 294
 295         if (card->state == CARD_STATE_SOFTSETUP) {
 296                 qeth_l2_del_all_macs(card);
 297                 qeth_clear_ipacmd_list(card);
 298                 card->state = CARD_STATE_HARDSETUP;
 299         }
 300         if (card->state == CARD_STATE_HARDSETUP) {
 301                 qeth_qdio_clear_card(card, 0);
 302                 qeth_clear_qdio_buffers(card);
 303                 qeth_clear_working_pool_list(card);
 304                 card->state = CARD_STATE_DOWN;
 305         }
 306         if (card->state == CARD_STATE_DOWN) {
 307                 qeth_clear_cmd_buffers(&card->read);
 308                 qeth_clear_cmd_buffers(&card->write);
 309         }
 310
 311         flush_workqueue(card->event_wq);
 312         card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 313 }
 314
 315 static int qeth_l2_process_inbound_buffer(struct qeth_card *card,
 316                                 int budget, int *done)
 317 {
 318         int work_done = 0;
 319         struct sk_buff *skb;
 320         struct qeth_hdr *hdr;
 321         unsigned int len;
 322
 323         *done = 0;
 324         WARN_ON_ONCE(!budget);
 325         while (budget) {
 326                 skb = qeth_core_get_next_skb(card,
 327                         &card->qdio.in_q->bufs[card->rx.b_index],
 328                         &card->rx.b_element, &card->rx.e_offset, &hdr);
 329                 if (!skb) {
 330                         *done = 1;
 331                         break;
 332                 }
 333                 switch (hdr->hdr.l2.id) {
 334                 case QETH_HEADER_TYPE_LAYER2:
 335                         skb->protocol = eth_type_trans(skb, skb->dev);
 336                         qeth_rx_csum(card, skb, hdr->hdr.l2.flags[1]);
 337                         if (skb->protocol == htons(ETH_P_802_2))
 338                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
 339                         len = skb->len;
 340                         napi_gro_receive(&card->napi, skb);
 341                         break;
 342                 case QETH_HEADER_TYPE_OSN:
 343                         if (card->info.type == QETH_CARD_TYPE_OSN) {
 344                                 skb_push(skb, sizeof(struct qeth_hdr));
 345                                 skb_copy_to_linear_data(skb, hdr,
 346                                                 sizeof(struct qeth_hdr));
 347                                 len = skb->len;
 348                                 card->osn_info.data_cb(skb);
 349                                 break;
 350                         }
 351                         /* else unknown */
 352                 default:
 353                         dev_kfree_skb_any(skb);
 354                         QETH_CARD_TEXT(card, 3, "inbunkno");
 355                         QETH_DBF_HEX(CTRL, 3, hdr, sizeof(*hdr));
 356                         continue;
 357                 }
 358                 work_done++;
 359                 budget--;
 360                 QETH_CARD_STAT_INC(card, rx_packets);
 361                 QETH_CARD_STAT_ADD(card, rx_bytes, len);
 362         }
 363         return work_done;
 364 }
 365
 366 static int qeth_l2_request_initial_mac(struct qeth_card *card)
 367 {
 368         int rc = 0;
 369
 370         QETH_DBF_TEXT(SETUP, 2, "l2reqmac");
 371         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
 372
 373         if (MACHINE_IS_VM) {
 374                 rc = qeth_vm_request_mac(card);
 375                 if (!rc)
 376                         goto out;
 377                 QETH_DBF_MESSAGE(2, "z/VM MAC Service failed on device %x: %#x\n",
 378                                  CARD_DEVID(card), rc);
 379                 QETH_DBF_TEXT_(SETUP, 2, "err%04x", rc);
 380                 /* fall back to alternative mechanism: */
 381         }
 382
 383         if (!IS_OSN(card)) {
 384                 rc = qeth_setadpparms_change_macaddr(card);
 385                 if (!rc)
 386                         goto out;
 387                 QETH_DBF_MESSAGE(2, "READ_MAC Assist failed on device %x: %#x\n",
 388                                  CARD_DEVID(card), rc);
 389                 QETH_DBF_TEXT_(SETUP, 2, "1err%04x", rc);
 390                 /* fall back once more: */
 391         }
 392
 393         /* some devices don't support a custom MAC address: */
 394         if (card->info.type == QETH_CARD_TYPE_OSM ||
 395             card->info.type == QETH_CARD_TYPE_OSX)
 396                 return (rc) ? rc : -EADDRNOTAVAIL;
 397         eth_hw_addr_random(card->dev);
 398
 399 out:
 400         QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, card->dev->addr_len);
 401         return 0;
 402 }
 403
 404 static void qeth_l2_register_dev_addr(struct qeth_card *card)
 405 {
 406         if (!is_valid_ether_addr(card->dev->dev_addr))
 407                 qeth_l2_request_initial_mac(card);
 408
 409         if (!IS_OSN(card) && !qeth_l2_send_setmac(card, card->dev->dev_addr))
 410                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 411 }
 412
 413 static int qeth_l2_validate_addr(struct net_device *dev)
 414 {
 415         struct qeth_card *card = dev->ml_priv;
 416
 417         if (card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED)
 418                 return eth_validate_addr(dev);
 419
 420         QETH_CARD_TEXT(card, 4, "nomacadr");
 421         return -EPERM;
 422 }
 423
 424 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 425 {
 426         struct sockaddr *addr = p;
 427         struct qeth_card *card = dev->ml_priv;
 428         u8 old_addr[ETH_ALEN];
 429         int rc = 0;
 430
 431         QETH_CARD_TEXT(card, 3, "setmac");
 432
 433         if (IS_OSM(card) || IS_OSX(card)) {
 434                 QETH_CARD_TEXT(card, 3, "setmcTYP");
 435                 return -EOPNOTSUPP;
 436         }
 437         QETH_CARD_HEX(card, 3, addr->sa_data, ETH_ALEN);
 438         if (!is_valid_ether_addr(addr->sa_data))
 439                 return -EADDRNOTAVAIL;
 440
 441         /* don't register the same address twice */
 442         if (ether_addr_equal_64bits(dev->dev_addr, addr->sa_data) &&
 443             (card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
 444                 return 0;
 445
 446         /* add the new address, switch over, drop the old */
 447         rc = qeth_l2_send_setmac(card, addr->sa_data);
 448         if (rc)
 449                 return rc;
 450         ether_addr_copy(old_addr, dev->dev_addr);
 451         ether_addr_copy(dev->dev_addr, addr->sa_data);
 452
 453         if (card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED)
 454                 qeth_l2_remove_mac(card, old_addr);
 455         card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 456         return 0;
 457 }
 458
 459 static void qeth_promisc_to_bridge(struct qeth_card *card)
 460 {
 461         struct net_device *dev = card->dev;
 462         enum qeth_ipa_promisc_modes promisc_mode;
 463         int role;
 464         int rc;
 465
 466         QETH_CARD_TEXT(card, 3, "pmisc2br");
 467
 468         if (!card->options.sbp.reflect_promisc)
 469                 return;
 470         promisc_mode = (dev->flags & IFF_PROMISC) ? SET_PROMISC_MODE_ON
 471                                                 : SET_PROMISC_MODE_OFF;
 472         if (promisc_mode == card->info.promisc_mode)
 473                 return;
 474
 475         if (promisc_mode == SET_PROMISC_MODE_ON) {
 476                 if (card->options.sbp.reflect_promisc_primary)
 477                         role = QETH_SBP_ROLE_PRIMARY;
 478                 else
 479                         role = QETH_SBP_ROLE_SECONDARY;
 480         } else
 481                 role = QETH_SBP_ROLE_NONE;
 482
 483         rc = qeth_bridgeport_setrole(card, role);
 484         QETH_DBF_TEXT_(SETUP, 2, "bpm%c%04x",
 485                         (promisc_mode == SET_PROMISC_MODE_ON) ? '+' : '-', rc);
 486         if (!rc) {
 487                 card->options.sbp.role = role;
 488                 card->info.promisc_mode = promisc_mode;
 489         }
 490
 491 }
 492 /* New MAC address is added to the hash table and marked to be written on card
 493  * only if there is not in the hash table storage already
 494  *
 495 */
 496 static void qeth_l2_add_mac(struct qeth_card *card, struct netdev_hw_addr *ha)
 497 {
 498         u32 mac_hash = get_unaligned((u32 *)(&ha->addr[2]));
 499         struct qeth_mac *mac;
 500
 501         hash_for_each_possible(card->mac_htable, mac, hnode, mac_hash) {
 502                 if (ether_addr_equal_64bits(ha->addr, mac->mac_addr)) {
 503                         mac->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
 504                         return;
 505                 }
 506         }
 507
 508         mac = kzalloc(sizeof(struct qeth_mac), GFP_ATOMIC);
 509         if (!mac)
 510                 return;
 511
 512         ether_addr_copy(mac->mac_addr, ha->addr);
 513         mac->disp_flag = QETH_DISP_ADDR_ADD;
 514
 515         hash_add(card->mac_htable, &mac->hnode, mac_hash);
 516 }
 517
 518 static void qeth_l2_set_rx_mode(struct net_device *dev)
 519 {
 520         struct qeth_card *card = dev->ml_priv;
 521         struct netdev_hw_addr *ha;
 522         struct qeth_mac *mac;
 523         struct hlist_node *tmp;
 524         int i;
 525         int rc;
 526
 527         QETH_CARD_TEXT(card, 3, "setmulti");
 528
 529         spin_lock_bh(&card->mclock);
 530
 531         netdev_for_each_mc_addr(ha, dev)
 532                 qeth_l2_add_mac(card, ha);
 533         netdev_for_each_uc_addr(ha, dev)
 534                 qeth_l2_add_mac(card, ha);
 535
 536         hash_for_each_safe(card->mac_htable, i, tmp, mac, hnode) {
 537                 switch (mac->disp_flag) {
 538                 case QETH_DISP_ADDR_DELETE:
 539                         qeth_l2_remove_mac(card, mac->mac_addr);
 540                         hash_del(&mac->hnode);
 541                         kfree(mac);
 542                         break;
 543                 case QETH_DISP_ADDR_ADD:
 544                         rc = qeth_l2_write_mac(card, mac->mac_addr);
 545                         if (rc) {
 546                                 hash_del(&mac->hnode);
 547                                 kfree(mac);
 548                                 break;
 549                         }
 550                         /* fall through */
 551                 default:
 552                         /* for next call to set_rx_mode(): */
 553                         mac->disp_flag = QETH_DISP_ADDR_DELETE;
 554                 }
 555         }
 556
 557         spin_unlock_bh(&card->mclock);
 558
 559         if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
 560                 qeth_setadp_promisc_mode(card);
 561         else
 562                 qeth_promisc_to_bridge(card);
 563 }
 564
 565 static int qeth_l2_xmit_osn(struct qeth_card *card, struct sk_buff *skb,
 566                             struct qeth_qdio_out_q *queue)
 567 {
 568         struct qeth_hdr *hdr = (struct qeth_hdr *)skb->data;
 569         addr_t end = (addr_t)(skb->data + sizeof(*hdr));
 570         addr_t start = (addr_t)skb->data;
 571         unsigned int elements = 0;
 572         unsigned int hd_len = 0;
 573         int rc;
 574
 575         if (skb->protocol == htons(ETH_P_IPV6))
 576                 return -EPROTONOSUPPORT;
 577
 578         if (qeth_get_elements_for_range(start, end) > 1) {
 579                 /* Misaligned HW header, move it to its own buffer element. */
 580                 hdr = kmem_cache_alloc(qeth_core_header_cache, GFP_ATOMIC);
 581                 if (!hdr)
 582                         return -ENOMEM;
 583                 hd_len = sizeof(*hdr);
 584                 skb_copy_from_linear_data(skb, (char *)hdr, hd_len);
 585                 elements++;
 586         }
 587
 588         elements += qeth_count_elements(skb, hd_len);
 589         if (elements > QETH_MAX_BUFFER_ELEMENTS(card)) {
 590                 rc = -E2BIG;
 591                 goto out;
 592         }
 593
 594         rc = qeth_do_send_packet(card, queue, skb, hdr, hd_len, hd_len,
 595                                  elements);
 596 out:
 597         if (rc && hd_len)
 598                 kmem_cache_free(qeth_core_header_cache, hdr);
 599         return rc;
 600 }
 601
 602 static netdev_tx_t qeth_l2_hard_start_xmit(struct sk_buff *skb,
 603                                            struct net_device *dev)
 604 {
 605         struct qeth_card *card = dev->ml_priv;
 606         int cast_type = qeth_l2_get_cast_type(card, skb);
 607         int ipv = qeth_get_ip_version(skb);
 608         struct qeth_qdio_out_q *queue;
 609         int tx_bytes = skb->len;
 610         int rc;
 611
 612         queue = qeth_get_tx_queue(card, skb, ipv, cast_type);
 613
 614         netif_stop_queue(dev);
 615
 616         if (IS_OSN(card))
 617                 rc = qeth_l2_xmit_osn(card, skb, queue);
 618         else
 619                 rc = qeth_xmit(card, skb, queue, ipv, cast_type,
 620                                qeth_l2_fill_header);
 621
 622         if (!rc) {
 623                 QETH_TXQ_STAT_INC(queue, tx_packets);
 624                 QETH_TXQ_STAT_ADD(queue, tx_bytes, tx_bytes);
 625                 netif_wake_queue(dev);
 626                 return NETDEV_TX_OK;
 627         } else if (rc == -EBUSY) {
 628                 return NETDEV_TX_BUSY;
 629         } /* else fall through */
 630
 631         QETH_TXQ_STAT_INC(queue, tx_dropped);
 632         QETH_TXQ_STAT_INC(queue, tx_errors);
 633         dev_kfree_skb_any(skb);
 634         netif_wake_queue(dev);
 635         return NETDEV_TX_OK;
 636 }
 637
 638 static const struct device_type qeth_l2_devtype = {
 639         .name = "qeth_layer2",
 640         .groups = qeth_l2_attr_groups,
 641 };
 642
 643 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 644 {
 645         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 646         int rc;
 647
 648         if (gdev->dev.type == &qeth_generic_devtype) {
 649                 rc = qeth_l2_create_device_attributes(&gdev->dev);
 650                 if (rc)
 651                         return rc;
 652         }
 653
 654         hash_init(card->mac_htable);
 655         card->info.hwtrap = 0;
 656         qeth_l2_vnicc_set_defaults(card);
 657         return 0;
 658 }
 659
 660 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
 661 {
 662         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
 663
 664         if (cgdev->dev.type == &qeth_generic_devtype)
 665                 qeth_l2_remove_device_attributes(&cgdev->dev);
 666         qeth_set_allowed_threads(card, 0, 1);
 667         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 668
 669         if (cgdev->state == CCWGROUP_ONLINE)
 670                 qeth_l2_set_offline(cgdev);
 671
 672         cancel_work_sync(&card->close_dev_work);
 673         if (qeth_netdev_is_registered(card->dev))
 674                 unregister_netdev(card->dev);
 675 }
 676
 677 static const struct net_device_ops qeth_l2_netdev_ops = {
 678         .ndo_open               = qeth_open,
 679         .ndo_stop               = qeth_stop,
 680         .ndo_get_stats64        = qeth_get_stats64,
 681         .ndo_start_xmit         = qeth_l2_hard_start_xmit,
 682         .ndo_features_check     = qeth_features_check,
 683         .ndo_validate_addr      = qeth_l2_validate_addr,
 684         .ndo_set_rx_mode        = qeth_l2_set_rx_mode,
 685         .ndo_do_ioctl           = qeth_do_ioctl,
 686         .ndo_set_mac_address    = qeth_l2_set_mac_address,
 687         .ndo_vlan_rx_add_vid    = qeth_l2_vlan_rx_add_vid,
 688         .ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,
 689         .ndo_tx_timeout         = qeth_tx_timeout,
 690         .ndo_fix_features       = qeth_fix_features,
 691         .ndo_set_features       = qeth_set_features
 692 };
 693
 694 static const struct net_device_ops qeth_osn_netdev_ops = {
 695         .ndo_open               = qeth_open,
 696         .ndo_stop               = qeth_stop,
 697         .ndo_get_stats64        = qeth_get_stats64,
 698         .ndo_start_xmit         = qeth_l2_hard_start_xmit,
 699         .ndo_validate_addr      = eth_validate_addr,
 700         .ndo_tx_timeout         = qeth_tx_timeout,
 701 };
 702
 703 static int qeth_l2_setup_netdev(struct qeth_card *card, bool carrier_ok)
 704 {
 705         int rc;
 706
 707         if (IS_OSN(card)) {
 708                 card->dev->netdev_ops = &qeth_osn_netdev_ops;
 709                 card->dev->flags |= IFF_NOARP;
 710                 goto add_napi;
 711         }
 712
 713         card->dev->needed_headroom = sizeof(struct qeth_hdr);
 714         card->dev->netdev_ops = &qeth_l2_netdev_ops;
 715         card->dev->priv_flags |= IFF_UNICAST_FLT;
 716
 717         if (IS_OSM(card)) {
 718                 card->dev->features |= NETIF_F_VLAN_CHALLENGED;
 719         } else {
 720                 if (!IS_VM_NIC(card))
 721                         card->dev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
 722                 card->dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
 723         }
 724
 725         if (card->info.type == QETH_CARD_TYPE_OSD && !card->info.guestlan) {
 726                 card->dev->features |= NETIF_F_SG;
 727                 /* OSA 3S and earlier has no RX/TX support */
 728                 if (qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM)) {
 729                         card->dev->hw_features |= NETIF_F_IP_CSUM;
 730                         card->dev->vlan_features |= NETIF_F_IP_CSUM;
 731                 }
 732         }
 733         if (qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) {
 734                 card->dev->hw_features |= NETIF_F_IPV6_CSUM;
 735                 card->dev->vlan_features |= NETIF_F_IPV6_CSUM;
 736         }
 737         if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM) ||
 738             qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6)) {
 739                 card->dev->hw_features |= NETIF_F_RXCSUM;
 740                 card->dev->vlan_features |= NETIF_F_RXCSUM;
 741         }
 742         if (qeth_is_supported(card, IPA_OUTBOUND_TSO)) {
 743                 card->dev->hw_features |= NETIF_F_TSO;
 744                 card->dev->vlan_features |= NETIF_F_TSO;
 745         }
 746         if (qeth_is_supported6(card, IPA_OUTBOUND_TSO)) {
 747                 card->dev->hw_features |= NETIF_F_TSO6;
 748                 card->dev->vlan_features |= NETIF_F_TSO6;
 749         }
 750
 751         if (card->dev->hw_features & (NETIF_F_TSO | NETIF_F_TSO6)) {
 752                 card->dev->needed_headroom = sizeof(struct qeth_hdr_tso);
 753                 netif_set_gso_max_size(card->dev,
 754                                        PAGE_SIZE * (QDIO_MAX_ELEMENTS_PER_BUFFER - 1));
 755         }
 756
 757 add_napi:
 758         netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT);
 759         rc = register_netdev(card->dev);
 760         if (!rc && carrier_ok)
 761                 netif_carrier_on(card->dev);
 762
 763         if (rc)
 764                 card->dev->netdev_ops = NULL;
 765         return rc;
 766 }
 767
 768 static int qeth_l2_start_ipassists(struct qeth_card *card)
 769 {
 770         /* configure isolation level */
 771         if (qeth_set_access_ctrl_online(card, 0))
 772                 return -ENODEV;
 773         return 0;
 774 }
 775
 776 static void qeth_l2_trace_features(struct qeth_card *card)
 777 {
 778         /* Set BridgePort features */
 779         QETH_CARD_TEXT(card, 2, "featuSBP");
 780         QETH_CARD_HEX(card, 2, &card->options.sbp.supported_funcs,
 781                       sizeof(card->options.sbp.supported_funcs));
 782         /* VNIC Characteristics features */
 783         QETH_CARD_TEXT(card, 2, "feaVNICC");
 784         QETH_CARD_HEX(card, 2, &card->options.vnicc.sup_chars,
 785                       sizeof(card->options.vnicc.sup_chars));
 786 }
 787
 788 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
 789 {
 790         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 791         struct net_device *dev = card->dev;
 792         int rc = 0;
 793         bool carrier_ok;
 794
 795         mutex_lock(&card->discipline_mutex);
 796         mutex_lock(&card->conf_mutex);
 797         QETH_DBF_TEXT(SETUP, 2, "setonlin");
 798         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 799
 800         rc = qeth_core_hardsetup_card(card, &carrier_ok);
 801         if (rc) {
 802                 QETH_DBF_TEXT_(SETUP, 2, "2err%04x", rc);
 803                 rc = -ENODEV;
 804                 goto out_remove;
 805         }
 806
 807         if (qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP)) {
 808                 if (card->info.hwtrap &&
 809                     qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM))
 810                         card->info.hwtrap = 0;
 811         } else
 812                 card->info.hwtrap = 0;
 813
 814         qeth_bridgeport_query_support(card);
 815         if (card->options.sbp.supported_funcs)
 816                 dev_info(&card->gdev->dev,
 817                 "The device represents a Bridge Capable Port\n");
 818
 819         qeth_l2_register_dev_addr(card);
 820
 821         /* for the rx_bcast characteristic, init VNICC after setmac */
 822         qeth_l2_vnicc_init(card);
 823
 824         qeth_trace_features(card);
 825         qeth_l2_trace_features(card);
 826
 827         qeth_l2_setup_bridgeport_attrs(card);
 828
 829         card->state = CARD_STATE_HARDSETUP;
 830         qeth_print_status_message(card);
 831
 832         /* softsetup */
 833         QETH_DBF_TEXT(SETUP, 2, "softsetp");
 834
 835         if ((card->info.type == QETH_CARD_TYPE_OSD) ||
 836             (card->info.type == QETH_CARD_TYPE_OSX)) {
 837                 rc = qeth_l2_start_ipassists(card);
 838                 if (rc)
 839                         goto out_remove;
 840         }
 841
 842         rc = qeth_init_qdio_queues(card);
 843         if (rc) {
 844                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
 845                 rc = -ENODEV;
 846                 goto out_remove;
 847         }
 848         card->state = CARD_STATE_SOFTSETUP;
 849
 850         qeth_set_allowed_threads(card, 0xffffffff, 0);
 851
 852         if (!qeth_netdev_is_registered(dev)) {
 853                 rc = qeth_l2_setup_netdev(card, carrier_ok);
 854                 if (rc)
 855                         goto out_remove;
 856         } else {
 857                 rtnl_lock();
 858                 if (carrier_ok)
 859                         netif_carrier_on(dev);
 860                 else
 861                         netif_carrier_off(dev);
 862
 863                 netif_device_attach(dev);
 864                 qeth_enable_hw_features(dev);
 865
 866                 if (card->info.open_when_online) {
 867                         card->info.open_when_online = 0;
 868                         dev_open(dev, NULL);
 869                 }
 870                 rtnl_unlock();
 871         }
 872         /* let user_space know that device is online */
 873         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
 874         mutex_unlock(&card->conf_mutex);
 875         mutex_unlock(&card->discipline_mutex);
 876         return 0;
 877
 878 out_remove:
 879         qeth_l2_stop_card(card);
 880         ccw_device_set_offline(CARD_DDEV(card));
 881         ccw_device_set_offline(CARD_WDEV(card));
 882         ccw_device_set_offline(CARD_RDEV(card));
 883         qdio_free(CARD_DDEV(card));
 884         card->state = CARD_STATE_DOWN;
 885
 886         mutex_unlock(&card->conf_mutex);
 887         mutex_unlock(&card->discipline_mutex);
 888         return rc;
 889 }
 890
 891 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
 892                                         int recovery_mode)
 893 {
 894         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
 895         int rc = 0, rc2 = 0, rc3 = 0;
 896
 897         mutex_lock(&card->discipline_mutex);
 898         mutex_lock(&card->conf_mutex);
 899         QETH_DBF_TEXT(SETUP, 3, "setoffl");
 900         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
 901
 902         if ((!recovery_mode && card->info.hwtrap) || card->info.hwtrap == 2) {
 903                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
 904                 card->info.hwtrap = 1;
 905         }
 906
 907         rtnl_lock();
 908         card->info.open_when_online = card->dev->flags & IFF_UP;
 909         dev_close(card->dev);
 910         netif_device_detach(card->dev);
 911         netif_carrier_off(card->dev);
 912         rtnl_unlock();
 913
 914         qeth_l2_stop_card(card);
 915         rc  = ccw_device_set_offline(CARD_DDEV(card));
 916         rc2 = ccw_device_set_offline(CARD_WDEV(card));
 917         rc3 = ccw_device_set_offline(CARD_RDEV(card));
 918         if (!rc)
 919                 rc = (rc2) ? rc2 : rc3;
 920         if (rc)
 921                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
 922         qdio_free(CARD_DDEV(card));
 923
 924         /* let user_space know that device is offline */
 925         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
 926         mutex_unlock(&card->conf_mutex);
 927         mutex_unlock(&card->discipline_mutex);
 928         return 0;
 929 }
 930
 931 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
 932 {
 933         return __qeth_l2_set_offline(cgdev, 0);
 934 }
 935
 936 static int qeth_l2_recover(void *ptr)
 937 {
 938         struct qeth_card *card;
 939         int rc = 0;
 940
 941         card = (struct qeth_card *) ptr;
 942         QETH_CARD_TEXT(card, 2, "recover1");
 943         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
 944                 return 0;
 945         QETH_CARD_TEXT(card, 2, "recover2");
 946         dev_warn(&card->gdev->dev,
 947                 "A recovery process has been started for the device\n");
 948         __qeth_l2_set_offline(card->gdev, 1);
 949         rc = qeth_l2_set_online(card->gdev);
 950         if (!rc)
 951                 dev_info(&card->gdev->dev,
 952                         "Device successfully recovered!\n");
 953         else {
 954                 ccwgroup_set_offline(card->gdev);
 955                 dev_warn(&card->gdev->dev, "The qeth device driver "
 956                                 "failed to recover an error on the device\n");
 957         }
 958         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
 959         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
 960         return 0;
 961 }
 962
 963 static int __init qeth_l2_init(void)
 964 {
 965         pr_info("register layer 2 discipline\n");
 966         return 0;
 967 }
 968
 969 static void __exit qeth_l2_exit(void)
 970 {
 971         pr_info("unregister layer 2 discipline\n");
 972 }
 973
 974 static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev)
 975 {
 976         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 977
 978         qeth_set_allowed_threads(card, 0, 1);
 979         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 980         if (gdev->state == CCWGROUP_OFFLINE)
 981                 return 0;
 982
 983         qeth_l2_set_offline(gdev);
 984         return 0;
 985 }
 986
 987 static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
 988 {
 989         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 990         int rc;
 991
 992         rc = qeth_l2_set_online(gdev);
 993
 994         qeth_set_allowed_threads(card, 0xffffffff, 0);
 995         if (rc)
 996                 dev_warn(&card->gdev->dev, "The qeth device driver "
 997                         "failed to recover an error on the device\n");
 998         return rc;
 999 }
1000
1001 /* Returns zero if the command is successfully "consumed" */
1002 static int qeth_l2_control_event(struct qeth_card *card,
1003                                         struct qeth_ipa_cmd *cmd)
1004 {
1005         switch (cmd->hdr.command) {
1006         case IPA_CMD_SETBRIDGEPORT_OSA:
1007         case IPA_CMD_SETBRIDGEPORT_IQD:
1008                 if (cmd->data.sbp.hdr.command_code ==
1009                                 IPA_SBP_BRIDGE_PORT_STATE_CHANGE) {
1010                         qeth_bridge_state_change(card, cmd);
1011                         return 0;
1012                 } else
1013                         return 1;
1014         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
1015                 qeth_bridge_host_event(card, cmd);
1016                 return 0;
1017         default:
1018                 return 1;
1019         }
1020 }
1021
1022 struct qeth_discipline qeth_l2_discipline = {
1023         .devtype = &qeth_l2_devtype,
1024         .process_rx_buffer = qeth_l2_process_inbound_buffer,
1025         .recover = qeth_l2_recover,
1026         .setup = qeth_l2_probe_device,
1027         .remove = qeth_l2_remove_device,
1028         .set_online = qeth_l2_set_online,
1029         .set_offline = qeth_l2_set_offline,
1030         .freeze = qeth_l2_pm_suspend,
1031         .thaw = qeth_l2_pm_resume,
1032         .restore = qeth_l2_pm_resume,
1033         .do_ioctl = NULL,
1034         .control_event_handler = qeth_l2_control_event,
1035 };
1036 EXPORT_SYMBOL_GPL(qeth_l2_discipline);
1037
1038 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1039                            struct qeth_cmd_buffer *iob)
1040 {
1041         struct qeth_channel *channel = iob->channel;
1042         int rc = 0;
1043
1044         QETH_CARD_TEXT(card, 5, "osndctrd");
1045
1046         wait_event(card->wait_q,
1047                    atomic_cmpxchg(&channel->irq_pending, 0, 1) == 0);
1048         qeth_prepare_control_data(card, len, iob);
1049         QETH_CARD_TEXT(card, 6, "osnoirqp");
1050         spin_lock_irq(get_ccwdev_lock(channel->ccwdev));
1051         rc = ccw_device_start_timeout(channel->ccwdev, channel->ccw,
1052                                       (addr_t) iob, 0, 0, QETH_IPA_TIMEOUT);
1053         spin_unlock_irq(get_ccwdev_lock(channel->ccwdev));
1054         if (rc) {
1055                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1056                            "ccw_device_start rc = %i\n", rc);
1057                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1058                 qeth_release_buffer(channel, iob);
1059                 atomic_set(&channel->irq_pending, 0);
1060                 wake_up(&card->wait_q);
1061         }
1062         return rc;
1063 }
1064
1065 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1066                                  struct qeth_cmd_buffer *iob)
1067 {
1068         u16 length;
1069
1070         QETH_CARD_TEXT(card, 4, "osndipa");
1071
1072         memcpy(&length, QETH_IPA_PDU_LEN_TOTAL(iob->data), 2);
1073         return qeth_osn_send_control_data(card, length, iob);
1074 }
1075
1076 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1077 {
1078         struct qeth_cmd_buffer *iob;
1079         struct qeth_card *card;
1080
1081         if (!dev)
1082                 return -ENODEV;
1083         card = dev->ml_priv;
1084         if (!card)
1085                 return -ENODEV;
1086         QETH_CARD_TEXT(card, 2, "osnsdmc");
1087         if (!qeth_card_hw_is_reachable(card))
1088                 return -ENODEV;
1089         iob = qeth_wait_for_buffer(&card->write);
1090         qeth_prepare_ipa_cmd(card, iob, (u16) data_len);
1091         memcpy(__ipa_cmd(iob), data, data_len);
1092         return qeth_osn_send_ipa_cmd(card, iob);
1093 }
1094 EXPORT_SYMBOL(qeth_osn_assist);
1095
1096 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1097                   int (*assist_cb)(struct net_device *, void *),
1098                   int (*data_cb)(struct sk_buff *))
1099 {
1100         struct qeth_card *card;
1101         char bus_id[16];
1102         u16 devno;
1103
1104         memcpy(&devno, read_dev_no, 2);
1105         sprintf(bus_id, "0.0.%04x", devno);
1106         card = qeth_get_card_by_busid(bus_id);
1107         if (!card || !IS_OSN(card))
1108                 return -ENODEV;
1109         *dev = card->dev;
1110
1111         QETH_CARD_TEXT(card, 2, "osnreg");
1112         if ((assist_cb == NULL) || (data_cb == NULL))
1113                 return -EINVAL;
1114         card->osn_info.assist_cb = assist_cb;
1115         card->osn_info.data_cb = data_cb;
1116         return 0;
1117 }
1118 EXPORT_SYMBOL(qeth_osn_register);
1119
1120 void qeth_osn_deregister(struct net_device *dev)
1121 {
1122         struct qeth_card *card;
1123
1124         if (!dev)
1125                 return;
1126         card = dev->ml_priv;
1127         if (!card)
1128                 return;
1129         QETH_CARD_TEXT(card, 2, "osndereg");
1130         card->osn_info.assist_cb = NULL;
1131         card->osn_info.data_cb = NULL;
1132         return;
1133 }
1134 EXPORT_SYMBOL(qeth_osn_deregister);
1135
1136 /* SETBRIDGEPORT support, async notifications */
1137
1138 enum qeth_an_event_type {anev_reg_unreg, anev_abort, anev_reset};
1139
1140 /**
1141  * qeth_bridge_emit_host_event() - bridgeport address change notification
1142  * @card:  qeth_card structure pointer, for udev events.
1143  * @evtype:  "normal" register/unregister, or abort, or reset. For abort
1144  *            and reset token and addr_lnid are unused and may be NULL.
1145  * @code:  event bitmask: high order bit 0x80 value 1 means removal of an
1146  *                        object, 0 - addition of an object.
1147  *                        0x01 - VLAN, 0x02 - MAC, 0x03 - VLAN and MAC.
1148  * @token: "network token" structure identifying physical address of the port.
1149  * @addr_lnid: pointer to structure with MAC address and VLAN ID.
1150  *
1151  * This function is called when registrations and deregistrations are
1152  * reported by the hardware, and also when notifications are enabled -
1153  * for all currently registered addresses.
1154  */
1155 static void qeth_bridge_emit_host_event(struct qeth_card *card,
1156         enum qeth_an_event_type evtype,
1157         u8 code, struct net_if_token *token, struct mac_addr_lnid *addr_lnid)
1158 {
1159         char str[7][32];
1160         char *env[8];
1161         int i = 0;
1162
1163         switch (evtype) {
1164         case anev_reg_unreg:
1165                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=%s",
1166                                 (code & IPA_ADDR_CHANGE_CODE_REMOVAL)
1167                                 ? "deregister" : "register");
1168                 env[i] = str[i]; i++;
1169                 if (code & IPA_ADDR_CHANGE_CODE_VLANID) {
1170                         snprintf(str[i], sizeof(str[i]), "VLAN=%d",
1171                                 addr_lnid->lnid);
1172                         env[i] = str[i]; i++;
1173                 }
1174                 if (code & IPA_ADDR_CHANGE_CODE_MACADDR) {
1175                         snprintf(str[i], sizeof(str[i]), "MAC=%pM",
1176                                 addr_lnid->mac);
1177                         env[i] = str[i]; i++;
1178                 }
1179                 snprintf(str[i], sizeof(str[i]), "NTOK_BUSID=%x.%x.%04x",
1180                         token->cssid, token->ssid, token->devnum);
1181                 env[i] = str[i]; i++;
1182                 snprintf(str[i], sizeof(str[i]), "NTOK_IID=%02x", token->iid);
1183                 env[i] = str[i]; i++;
1184                 snprintf(str[i], sizeof(str[i]), "NTOK_CHPID=%02x",
1185                                 token->chpid);
1186                 env[i] = str[i]; i++;
1187                 snprintf(str[i], sizeof(str[i]), "NTOK_CHID=%04x", token->chid);
1188                 env[i] = str[i]; i++;
1189                 break;
1190         case anev_abort:
1191                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=abort");
1192                 env[i] = str[i]; i++;
1193                 break;
1194         case anev_reset:
1195                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=reset");
1196                 env[i] = str[i]; i++;
1197                 break;
1198         }
1199         env[i] = NULL;
1200         kobject_uevent_env(&card->gdev->dev.kobj, KOBJ_CHANGE, env);
1201 }
1202
1203 struct qeth_bridge_state_data {
1204         struct work_struct worker;
1205         struct qeth_card *card;
1206         struct qeth_sbp_state_change qports;
1207 };
1208
1209 static void qeth_bridge_state_change_worker(struct work_struct *work)
1210 {
1211         struct qeth_bridge_state_data *data =
1212                 container_of(work, struct qeth_bridge_state_data, worker);
1213         /* We are only interested in the first entry - local port */
1214         struct qeth_sbp_port_entry *entry = &data->qports.entry[0];
1215         char env_locrem[32];
1216         char env_role[32];
1217         char env_state[32];
1218         char *env[] = {
1219                 env_locrem,
1220                 env_role,
1221                 env_state,
1222                 NULL
1223         };
1224
1225         /* Role should not change by itself, but if it did, */
1226         /* information from the hardware is authoritative.  */
1227         mutex_lock(&data->card->conf_mutex);
1228         data->card->options.sbp.role = entry->role;
1229         mutex_unlock(&data->card->conf_mutex);
1230
1231         snprintf(env_locrem, sizeof(env_locrem), "BRIDGEPORT=statechange");
1232         snprintf(env_role, sizeof(env_role), "ROLE=%s",
1233                 (entry->role == QETH_SBP_ROLE_NONE) ? "none" :
1234                 (entry->role == QETH_SBP_ROLE_PRIMARY) ? "primary" :
1235                 (entry->role == QETH_SBP_ROLE_SECONDARY) ? "secondary" :
1236                 "<INVALID>");
1237         snprintf(env_state, sizeof(env_state), "STATE=%s",
1238                 (entry->state == QETH_SBP_STATE_INACTIVE) ? "inactive" :
1239                 (entry->state == QETH_SBP_STATE_STANDBY) ? "standby" :
1240                 (entry->state == QETH_SBP_STATE_ACTIVE) ? "active" :
1241                 "<INVALID>");
1242         kobject_uevent_env(&data->card->gdev->dev.kobj,
1243                                 KOBJ_CHANGE, env);
1244         kfree(data);
1245 }
1246
1247 static void qeth_bridge_state_change(struct qeth_card *card,
1248                                         struct qeth_ipa_cmd *cmd)
1249 {
1250         struct qeth_sbp_state_change *qports =
1251                  &cmd->data.sbp.data.state_change;
1252         struct qeth_bridge_state_data *data;
1253         int extrasize;
1254
1255         QETH_CARD_TEXT(card, 2, "brstchng");
1256         if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1257                 QETH_CARD_TEXT_(card, 2, "BPsz%04x", qports->entry_length);
1258                 return;
1259         }
1260         extrasize = sizeof(struct qeth_sbp_port_entry) * qports->num_entries;
1261         data = kzalloc(sizeof(struct qeth_bridge_state_data) + extrasize,
1262                 GFP_ATOMIC);
1263         if (!data) {
1264                 QETH_CARD_TEXT(card, 2, "BPSalloc");
1265                 return;
1266         }
1267         INIT_WORK(&data->worker, qeth_bridge_state_change_worker);
1268         data->card = card;
1269         memcpy(&data->qports, qports,
1270                         sizeof(struct qeth_sbp_state_change) + extrasize);
1271         queue_work(card->event_wq, &data->worker);
1272 }
1273
1274 struct qeth_bridge_host_data {
1275         struct work_struct worker;
1276         struct qeth_card *card;
1277         struct qeth_ipacmd_addr_change hostevs;
1278 };
1279
1280 static void qeth_bridge_host_event_worker(struct work_struct *work)
1281 {
1282         struct qeth_bridge_host_data *data =
1283                 container_of(work, struct qeth_bridge_host_data, worker);
1284         int i;
1285
1286         if (data->hostevs.lost_event_mask) {
1287                 dev_info(&data->card->gdev->dev,
1288 "Address notification from the Bridge Port stopped %s (%s)\n",
1289                         data->card->dev->name,
1290                         (data->hostevs.lost_event_mask == 0x01)
1291                         ? "Overflow"
1292                         : (data->hostevs.lost_event_mask == 0x02)
1293                         ? "Bridge port state change"
1294                         : "Unknown reason");
1295                 mutex_lock(&data->card->conf_mutex);
1296                 data->card->options.sbp.hostnotification = 0;
1297                 mutex_unlock(&data->card->conf_mutex);
1298                 qeth_bridge_emit_host_event(data->card, anev_abort,
1299                         0, NULL, NULL);
1300         } else
1301                 for (i = 0; i < data->hostevs.num_entries; i++) {
1302                         struct qeth_ipacmd_addr_change_entry *entry =
1303                                         &data->hostevs.entry[i];
1304                         qeth_bridge_emit_host_event(data->card,
1305                                         anev_reg_unreg,
1306                                         entry->change_code,
1307                                         &entry->token, &entry->addr_lnid);
1308                 }
1309         kfree(data);
1310 }
1311
1312 static void qeth_bridge_host_event(struct qeth_card *card,
1313                                         struct qeth_ipa_cmd *cmd)
1314 {
1315         struct qeth_ipacmd_addr_change *hostevs =
1316                  &cmd->data.addrchange;
1317         struct qeth_bridge_host_data *data;
1318         int extrasize;
1319
1320         QETH_CARD_TEXT(card, 2, "brhostev");
1321         if (cmd->hdr.return_code != 0x0000) {
1322                 if (cmd->hdr.return_code == 0x0010) {
1323                         if (hostevs->lost_event_mask == 0x00)
1324                                 hostevs->lost_event_mask = 0xff;
1325                 } else {
1326                         QETH_CARD_TEXT_(card, 2, "BPHe%04x",
1327                                 cmd->hdr.return_code);
1328                         return;
1329                 }
1330         }
1331         extrasize = sizeof(struct qeth_ipacmd_addr_change_entry) *
1332                                                 hostevs->num_entries;
1333         data = kzalloc(sizeof(struct qeth_bridge_host_data) + extrasize,
1334                 GFP_ATOMIC);
1335         if (!data) {
1336                 QETH_CARD_TEXT(card, 2, "BPHalloc");
1337                 return;
1338         }
1339         INIT_WORK(&data->worker, qeth_bridge_host_event_worker);
1340         data->card = card;
1341         memcpy(&data->hostevs, hostevs,
1342                         sizeof(struct qeth_ipacmd_addr_change) + extrasize);
1343         queue_work(card->event_wq, &data->worker);
1344 }
1345
1346 /* SETBRIDGEPORT support; sending commands */
1347
1348 struct _qeth_sbp_cbctl {
1349         union {
1350                 u32 supported;
1351                 struct {
1352                         enum qeth_sbp_roles *role;
1353                         enum qeth_sbp_states *state;
1354                 } qports;
1355         } data;
1356 };
1357
1358 static int qeth_bridgeport_makerc(struct qeth_card *card,
1359                                   struct qeth_ipa_cmd *cmd)
1360 {
1361         struct qeth_ipacmd_setbridgeport *sbp = &cmd->data.sbp;
1362         enum qeth_ipa_sbp_cmd setcmd = sbp->hdr.command_code;
1363         u16 ipa_rc = cmd->hdr.return_code;
1364         u16 sbp_rc = sbp->hdr.return_code;
1365         int rc;
1366
1367         if (ipa_rc == IPA_RC_SUCCESS && sbp_rc == IPA_RC_SUCCESS)
1368                 return 0;
1369
1370         if ((IS_IQD(card) && ipa_rc == IPA_RC_SUCCESS) ||
1371             (!IS_IQD(card) && ipa_rc == sbp_rc)) {
1372                 switch (sbp_rc) {
1373                 case IPA_RC_SUCCESS:
1374                         rc = 0;
1375                         break;
1376                 case IPA_RC_L2_UNSUPPORTED_CMD:
1377                 case IPA_RC_UNSUPPORTED_COMMAND:
1378                         rc = -EOPNOTSUPP;
1379                         break;
1380                 case IPA_RC_SBP_OSA_NOT_CONFIGURED:
1381                 case IPA_RC_SBP_IQD_NOT_CONFIGURED:
1382                         rc = -ENODEV; /* maybe not the best code here? */
1383                         dev_err(&card->gdev->dev,
1384         "The device is not configured as a Bridge Port\n");
1385                         break;
1386                 case IPA_RC_SBP_OSA_OS_MISMATCH:
1387                 case IPA_RC_SBP_IQD_OS_MISMATCH:
1388                         rc = -EPERM;
1389                         dev_err(&card->gdev->dev,
1390         "A Bridge Port is already configured by a different operating system\n");
1391                         break;
1392                 case IPA_RC_SBP_OSA_ANO_DEV_PRIMARY:
1393                 case IPA_RC_SBP_IQD_ANO_DEV_PRIMARY:
1394                         switch (setcmd) {
1395                         case IPA_SBP_SET_PRIMARY_BRIDGE_PORT:
1396                                 rc = -EEXIST;
1397                                 dev_err(&card->gdev->dev,
1398         "The LAN already has a primary Bridge Port\n");
1399                                 break;
1400                         case IPA_SBP_SET_SECONDARY_BRIDGE_PORT:
1401                                 rc = -EBUSY;
1402                                 dev_err(&card->gdev->dev,
1403         "The device is already a primary Bridge Port\n");
1404                                 break;
1405                         default:
1406                                 rc = -EIO;
1407                         }
1408                         break;
1409                 case IPA_RC_SBP_OSA_CURRENT_SECOND:
1410                 case IPA_RC_SBP_IQD_CURRENT_SECOND:
1411                         rc = -EBUSY;
1412                         dev_err(&card->gdev->dev,
1413         "The device is already a secondary Bridge Port\n");
1414                         break;
1415                 case IPA_RC_SBP_OSA_LIMIT_SECOND:
1416                 case IPA_RC_SBP_IQD_LIMIT_SECOND:
1417                         rc = -EEXIST;
1418                         dev_err(&card->gdev->dev,
1419         "The LAN cannot have more secondary Bridge Ports\n");
1420                         break;
1421                 case IPA_RC_SBP_OSA_CURRENT_PRIMARY:
1422                 case IPA_RC_SBP_IQD_CURRENT_PRIMARY:
1423                         rc = -EBUSY;
1424                         dev_err(&card->gdev->dev,
1425         "The device is already a primary Bridge Port\n");
1426                         break;
1427                 case IPA_RC_SBP_OSA_NOT_AUTHD_BY_ZMAN:
1428                 case IPA_RC_SBP_IQD_NOT_AUTHD_BY_ZMAN:
1429                         rc = -EACCES;
1430                         dev_err(&card->gdev->dev,
1431         "The device is not authorized to be a Bridge Port\n");
1432                         break;
1433                 default:
1434                         rc = -EIO;
1435                 }
1436         } else {
1437                 switch (ipa_rc) {
1438                 case IPA_RC_NOTSUPP:
1439                         rc = -EOPNOTSUPP;
1440                         break;
1441                 case IPA_RC_UNSUPPORTED_COMMAND:
1442                         rc = -EOPNOTSUPP;
1443                         break;
1444                 default:
1445                         rc = -EIO;
1446                 }
1447         }
1448
1449         if (rc) {
1450                 QETH_CARD_TEXT_(card, 2, "SBPi%04x", ipa_rc);
1451                 QETH_CARD_TEXT_(card, 2, "SBPc%04x", sbp_rc);
1452         }
1453         return rc;
1454 }
1455
1456 static struct qeth_cmd_buffer *qeth_sbp_build_cmd(struct qeth_card *card,
1457                                                   enum qeth_ipa_sbp_cmd sbp_cmd,
1458                                                   unsigned int cmd_length)
1459 {
1460         enum qeth_ipa_cmds ipa_cmd = (card->info.type == QETH_CARD_TYPE_IQD) ?
1461                                         IPA_CMD_SETBRIDGEPORT_IQD :
1462                                         IPA_CMD_SETBRIDGEPORT_OSA;
1463         struct qeth_cmd_buffer *iob;
1464         struct qeth_ipa_cmd *cmd;
1465
1466         iob = qeth_get_ipacmd_buffer(card, ipa_cmd, 0);
1467         if (!iob)
1468                 return iob;
1469         cmd = __ipa_cmd(iob);
1470         cmd->data.sbp.hdr.cmdlength = sizeof(struct qeth_ipacmd_sbp_hdr) +
1471                                       cmd_length;
1472         cmd->data.sbp.hdr.command_code = sbp_cmd;
1473         cmd->data.sbp.hdr.used_total = 1;
1474         cmd->data.sbp.hdr.seq_no = 1;
1475         return iob;
1476 }
1477
1478 static int qeth_bridgeport_query_support_cb(struct qeth_card *card,
1479         struct qeth_reply *reply, unsigned long data)
1480 {
1481         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1482         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1483         int rc;
1484
1485         QETH_CARD_TEXT(card, 2, "brqsupcb");
1486         rc = qeth_bridgeport_makerc(card, cmd);
1487         if (rc)
1488                 return rc;
1489
1490         cbctl->data.supported =
1491                 cmd->data.sbp.data.query_cmds_supp.supported_cmds;
1492         return 0;
1493 }
1494
1495 /**
1496  * qeth_bridgeport_query_support() - store bitmask of supported subfunctions.
1497  * @card:                            qeth_card structure pointer.
1498  *
1499  * Sets bitmask of supported setbridgeport subfunctions in the qeth_card
1500  * strucutre: card->options.sbp.supported_funcs.
1501  */
1502 static void qeth_bridgeport_query_support(struct qeth_card *card)
1503 {
1504         struct qeth_cmd_buffer *iob;
1505         struct _qeth_sbp_cbctl cbctl;
1506
1507         QETH_CARD_TEXT(card, 2, "brqsuppo");
1508         iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_COMMANDS_SUPPORTED,
1509                                  sizeof(struct qeth_sbp_query_cmds_supp));
1510         if (!iob)
1511                 return;
1512
1513         if (qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_support_cb,
1514                               &cbctl)) {
1515                 card->options.sbp.role = QETH_SBP_ROLE_NONE;
1516                 card->options.sbp.supported_funcs = 0;
1517                 return;
1518         }
1519         card->options.sbp.supported_funcs = cbctl.data.supported;
1520 }
1521
1522 static int qeth_bridgeport_query_ports_cb(struct qeth_card *card,
1523         struct qeth_reply *reply, unsigned long data)
1524 {
1525         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1526         struct qeth_sbp_query_ports *qports = &cmd->data.sbp.data.query_ports;
1527         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1528         int rc;
1529
1530         QETH_CARD_TEXT(card, 2, "brqprtcb");
1531         rc = qeth_bridgeport_makerc(card, cmd);
1532         if (rc)
1533                 return rc;
1534
1535         if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1536                 QETH_CARD_TEXT_(card, 2, "SBPs%04x", qports->entry_length);
1537                 return -EINVAL;
1538         }
1539         /* first entry contains the state of the local port */
1540         if (qports->num_entries > 0) {
1541                 if (cbctl->data.qports.role)
1542                         *cbctl->data.qports.role = qports->entry[0].role;
1543                 if (cbctl->data.qports.state)
1544                         *cbctl->data.qports.state = qports->entry[0].state;
1545         }
1546         return 0;
1547 }
1548
1549 /**
1550  * qeth_bridgeport_query_ports() - query local bridgeport status.
1551  * @card:                          qeth_card structure pointer.
1552  * @role:   Role of the port: 0-none, 1-primary, 2-secondary.
1553  * @state:  State of the port: 0-inactive, 1-standby, 2-active.
1554  *
1555  * Returns negative errno-compatible error indication or 0 on success.
1556  *
1557  * 'role' and 'state' are not updated in case of hardware operation failure.
1558  */
1559 int qeth_bridgeport_query_ports(struct qeth_card *card,
1560         enum qeth_sbp_roles *role, enum qeth_sbp_states *state)
1561 {
1562         struct qeth_cmd_buffer *iob;
1563         struct _qeth_sbp_cbctl cbctl = {
1564                 .data = {
1565                         .qports = {
1566                                 .role = role,
1567                                 .state = state,
1568                         },
1569                 },
1570         };
1571
1572         QETH_CARD_TEXT(card, 2, "brqports");
1573         if (!(card->options.sbp.supported_funcs & IPA_SBP_QUERY_BRIDGE_PORTS))
1574                 return -EOPNOTSUPP;
1575         iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_BRIDGE_PORTS, 0);
1576         if (!iob)
1577                 return -ENOMEM;
1578
1579         return qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_ports_cb,
1580                                  &cbctl);
1581 }
1582
1583 static int qeth_bridgeport_set_cb(struct qeth_card *card,
1584         struct qeth_reply *reply, unsigned long data)
1585 {
1586         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
1587
1588         QETH_CARD_TEXT(card, 2, "brsetrcb");
1589         return qeth_bridgeport_makerc(card, cmd);
1590 }
1591
1592 /**
1593  * qeth_bridgeport_setrole() - Assign primary role to the port.
1594  * @card:                      qeth_card structure pointer.
1595  * @role:                      Role to assign.
1596  *
1597  * Returns negative errno-compatible error indication or 0 on success.
1598  */
1599 int qeth_bridgeport_setrole(struct qeth_card *card, enum qeth_sbp_roles role)
1600 {
1601         int cmdlength;
1602         struct qeth_cmd_buffer *iob;
1603         enum qeth_ipa_sbp_cmd setcmd;
1604
1605         QETH_CARD_TEXT(card, 2, "brsetrol");
1606         switch (role) {
1607         case QETH_SBP_ROLE_NONE:
1608                 setcmd = IPA_SBP_RESET_BRIDGE_PORT_ROLE;
1609                 cmdlength = sizeof(struct qeth_sbp_reset_role);
1610                 break;
1611         case QETH_SBP_ROLE_PRIMARY:
1612                 setcmd = IPA_SBP_SET_PRIMARY_BRIDGE_PORT;
1613                 cmdlength = sizeof(struct qeth_sbp_set_primary);
1614                 break;
1615         case QETH_SBP_ROLE_SECONDARY:
1616                 setcmd = IPA_SBP_SET_SECONDARY_BRIDGE_PORT;
1617                 cmdlength = sizeof(struct qeth_sbp_set_secondary);
1618                 break;
1619         default:
1620                 return -EINVAL;
1621         }
1622         if (!(card->options.sbp.supported_funcs & setcmd))
1623                 return -EOPNOTSUPP;
1624         iob = qeth_sbp_build_cmd(card, setcmd, cmdlength);
1625         if (!iob)
1626                 return -ENOMEM;
1627
1628         return qeth_send_ipa_cmd(card, iob, qeth_bridgeport_set_cb, NULL);
1629 }
1630
1631 /**
1632  * qeth_anset_makerc() - derive "traditional" error from hardware codes.
1633  * @card:                     qeth_card structure pointer, for debug messages.
1634  *
1635  * Returns negative errno-compatible error indication or 0 on success.
1636  */
1637 static int qeth_anset_makerc(struct qeth_card *card, int pnso_rc, u16 response)
1638 {
1639         int rc;
1640
1641         if (pnso_rc == 0)
1642                 switch (response) {
1643                 case 0x0001:
1644                         rc = 0;
1645                         break;
1646                 case 0x0004:
1647                 case 0x0100:
1648                 case 0x0106:
1649                         rc = -EOPNOTSUPP;
1650                         dev_err(&card->gdev->dev,
1651                                 "Setting address notification failed\n");
1652                         break;
1653                 case 0x0107:
1654                         rc = -EAGAIN;
1655                         break;
1656                 default:
1657                         rc = -EIO;
1658                 }
1659         else
1660                 rc = -EIO;
1661
1662         if (rc) {
1663                 QETH_CARD_TEXT_(card, 2, "SBPp%04x", pnso_rc);
1664                 QETH_CARD_TEXT_(card, 2, "SBPr%04x", response);
1665         }
1666         return rc;
1667 }
1668
1669 static void qeth_bridgeport_an_set_cb(void *priv,
1670                 enum qdio_brinfo_entry_type type, void *entry)
1671 {
1672         struct qeth_card *card = (struct qeth_card *)priv;
1673         struct qdio_brinfo_entry_l2 *l2entry;
1674         u8 code;
1675
1676         if (type != l2_addr_lnid) {
1677                 WARN_ON_ONCE(1);
1678                 return;
1679         }
1680
1681         l2entry = (struct qdio_brinfo_entry_l2 *)entry;
1682         code = IPA_ADDR_CHANGE_CODE_MACADDR;
1683         if (l2entry->addr_lnid.lnid)
1684                 code |= IPA_ADDR_CHANGE_CODE_VLANID;
1685         qeth_bridge_emit_host_event(card, anev_reg_unreg, code,
1686                 (struct net_if_token *)&l2entry->nit,
1687                 (struct mac_addr_lnid *)&l2entry->addr_lnid);
1688 }
1689
1690 /**
1691  * qeth_bridgeport_an_set() - Enable or disable bridgeport address notification
1692  * @card:                     qeth_card structure pointer.
1693  * @enable:                   0 - disable, non-zero - enable notifications
1694  *
1695  * Returns negative errno-compatible error indication or 0 on success.
1696  *
1697  * On enable, emits a series of address notifications udev events for all
1698  * currently registered hosts.
1699  */
1700 int qeth_bridgeport_an_set(struct qeth_card *card, int enable)
1701 {
1702         int rc;
1703         u16 response;
1704         struct ccw_device *ddev;
1705         struct subchannel_id schid;
1706
1707         if (!card)
1708                 return -EINVAL;
1709         if (!card->options.sbp.supported_funcs)
1710                 return -EOPNOTSUPP;
1711         ddev = CARD_DDEV(card);
1712         ccw_device_get_schid(ddev, &schid);
1713
1714         if (enable) {
1715                 qeth_bridge_emit_host_event(card, anev_reset, 0, NULL, NULL);
1716                 rc = qdio_pnso_brinfo(schid, 1, &response,
1717                         qeth_bridgeport_an_set_cb, card);
1718         } else
1719                 rc = qdio_pnso_brinfo(schid, 0, &response, NULL, NULL);
1720         return qeth_anset_makerc(card, rc, response);
1721 }
1722
1723 static bool qeth_bridgeport_is_in_use(struct qeth_card *card)
1724 {
1725         return (card->options.sbp.role || card->options.sbp.reflect_promisc ||
1726                 card->options.sbp.hostnotification);
1727 }
1728
1729 /* VNIC Characteristics support */
1730
1731 /* handle VNICC IPA command return codes; convert to error codes */
1732 static int qeth_l2_vnicc_makerc(struct qeth_card *card, u16 ipa_rc)
1733 {
1734         int rc;
1735
1736         switch (ipa_rc) {
1737         case IPA_RC_SUCCESS:
1738                 return ipa_rc;
1739         case IPA_RC_L2_UNSUPPORTED_CMD:
1740         case IPA_RC_NOTSUPP:
1741                 rc = -EOPNOTSUPP;
1742                 break;
1743         case IPA_RC_VNICC_OOSEQ:
1744                 rc = -EALREADY;
1745                 break;
1746         case IPA_RC_VNICC_VNICBP:
1747                 rc = -EBUSY;
1748                 break;
1749         case IPA_RC_L2_ADDR_TABLE_FULL:
1750                 rc = -ENOSPC;
1751                 break;
1752         case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
1753                 rc = -EACCES;
1754                 break;
1755         default:
1756                 rc = -EIO;
1757         }
1758
1759         QETH_CARD_TEXT_(card, 2, "err%04x", ipa_rc);
1760         return rc;
1761 }
1762
1763 /* generic VNICC request call back control */
1764 struct _qeth_l2_vnicc_request_cbctl {
1765         u32 sub_cmd;
1766         struct {
1767                 u32 vnic_char;
1768                 u32 timeout;
1769         } param;
1770         struct {
1771                 union{
1772                         u32 *sup_cmds;
1773                         u32 *timeout;
1774                 };
1775         } result;
1776 };
1777
1778 /* generic VNICC request call back */
1779 static int qeth_l2_vnicc_request_cb(struct qeth_card *card,
1780                                     struct qeth_reply *reply,
1781                                     unsigned long data)
1782 {
1783         struct _qeth_l2_vnicc_request_cbctl *cbctl =
1784                 (struct _qeth_l2_vnicc_request_cbctl *) reply->param;
1785         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1786         struct qeth_ipacmd_vnicc *rep = &cmd->data.vnicc;
1787
1788         QETH_CARD_TEXT(card, 2, "vniccrcb");
1789         if (cmd->hdr.return_code)
1790                 return qeth_l2_vnicc_makerc(card, cmd->hdr.return_code);
1791         /* return results to caller */
1792         card->options.vnicc.sup_chars = rep->hdr.sup;
1793         card->options.vnicc.cur_chars = rep->hdr.cur;
1794
1795         if (cbctl->sub_cmd == IPA_VNICC_QUERY_CMDS)
1796                 *cbctl->result.sup_cmds = rep->query_cmds.sup_cmds;
1797
1798         if (cbctl->sub_cmd == IPA_VNICC_GET_TIMEOUT)
1799                 *cbctl->result.timeout = rep->getset_timeout.timeout;
1800
1801         return 0;
1802 }
1803
1804 /* generic VNICC request */
1805 static int qeth_l2_vnicc_request(struct qeth_card *card,
1806                                  struct _qeth_l2_vnicc_request_cbctl *cbctl)
1807 {
1808         struct qeth_ipacmd_vnicc *req;
1809         struct qeth_cmd_buffer *iob;
1810         struct qeth_ipa_cmd *cmd;
1811
1812         QETH_CARD_TEXT(card, 2, "vniccreq");
1813
1814         /* get new buffer for request */
1815         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_VNICC, 0);
1816         if (!iob)
1817                 return -ENOMEM;
1818
1819         /* create header for request */
1820         cmd = __ipa_cmd(iob);
1821         req = &cmd->data.vnicc;
1822
1823         /* create sub command header for request */
1824         req->sub_hdr.data_length = sizeof(req->sub_hdr);
1825         req->sub_hdr.sub_command = cbctl->sub_cmd;
1826
1827         /* create sub command specific request fields */
1828         switch (cbctl->sub_cmd) {
1829         case IPA_VNICC_QUERY_CHARS:
1830                 break;
1831         case IPA_VNICC_QUERY_CMDS:
1832                 req->sub_hdr.data_length += sizeof(req->query_cmds);
1833                 req->query_cmds.vnic_char = cbctl->param.vnic_char;
1834                 break;
1835         case IPA_VNICC_ENABLE:
1836         case IPA_VNICC_DISABLE:
1837                 req->sub_hdr.data_length += sizeof(req->set_char);
1838                 req->set_char.vnic_char = cbctl->param.vnic_char;
1839                 break;
1840         case IPA_VNICC_SET_TIMEOUT:
1841                 req->getset_timeout.timeout = cbctl->param.timeout;
1842                 /* fallthrough */
1843         case IPA_VNICC_GET_TIMEOUT:
1844                 req->sub_hdr.data_length += sizeof(req->getset_timeout);
1845                 req->getset_timeout.vnic_char = cbctl->param.vnic_char;
1846                 break;
1847         default:
1848                 qeth_release_buffer(iob->channel, iob);
1849                 return -EOPNOTSUPP;
1850         }
1851
1852         /* send request */
1853         return qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb, cbctl);
1854 }
1855
1856 /* VNICC query VNIC characteristics request */
1857 static int qeth_l2_vnicc_query_chars(struct qeth_card *card)
1858 {
1859         struct _qeth_l2_vnicc_request_cbctl cbctl;
1860
1861         /* prepare callback control */
1862         cbctl.sub_cmd = IPA_VNICC_QUERY_CHARS;
1863
1864         QETH_CARD_TEXT(card, 2, "vniccqch");
1865         return qeth_l2_vnicc_request(card, &cbctl);
1866 }
1867
1868 /* VNICC query sub commands request */
1869 static int qeth_l2_vnicc_query_cmds(struct qeth_card *card, u32 vnic_char,
1870                                     u32 *sup_cmds)
1871 {
1872         struct _qeth_l2_vnicc_request_cbctl cbctl;
1873
1874         /* prepare callback control */
1875         cbctl.sub_cmd = IPA_VNICC_QUERY_CMDS;
1876         cbctl.param.vnic_char = vnic_char;
1877         cbctl.result.sup_cmds = sup_cmds;
1878
1879         QETH_CARD_TEXT(card, 2, "vniccqcm");
1880         return qeth_l2_vnicc_request(card, &cbctl);
1881 }
1882
1883 /* VNICC enable/disable characteristic request */
1884 static int qeth_l2_vnicc_set_char(struct qeth_card *card, u32 vnic_char,
1885                                       u32 cmd)
1886 {
1887         struct _qeth_l2_vnicc_request_cbctl cbctl;
1888
1889         /* prepare callback control */
1890         cbctl.sub_cmd = cmd;
1891         cbctl.param.vnic_char = vnic_char;
1892
1893         QETH_CARD_TEXT(card, 2, "vniccedc");
1894         return qeth_l2_vnicc_request(card, &cbctl);
1895 }
1896
1897 /* VNICC get/set timeout for characteristic request */
1898 static int qeth_l2_vnicc_getset_timeout(struct qeth_card *card, u32 vnicc,
1899                                         u32 cmd, u32 *timeout)
1900 {
1901         struct _qeth_l2_vnicc_request_cbctl cbctl;
1902
1903         /* prepare callback control */
1904         cbctl.sub_cmd = cmd;
1905         cbctl.param.vnic_char = vnicc;
1906         if (cmd == IPA_VNICC_SET_TIMEOUT)
1907                 cbctl.param.timeout = *timeout;
1908         if (cmd == IPA_VNICC_GET_TIMEOUT)
1909                 cbctl.result.timeout = timeout;
1910
1911         QETH_CARD_TEXT(card, 2, "vniccgst");
1912         return qeth_l2_vnicc_request(card, &cbctl);
1913 }
1914
1915 /* set current VNICC flag state; called from sysfs store function */
1916 int qeth_l2_vnicc_set_state(struct qeth_card *card, u32 vnicc, bool state)
1917 {
1918         int rc = 0;
1919         u32 cmd;
1920
1921         QETH_CARD_TEXT(card, 2, "vniccsch");
1922
1923         /* do not change anything if BridgePort is enabled */
1924         if (qeth_bridgeport_is_in_use(card))
1925                 return -EBUSY;
1926
1927         /* check if characteristic and enable/disable are supported */
1928         if (!(card->options.vnicc.sup_chars & vnicc) ||
1929             !(card->options.vnicc.set_char_sup & vnicc))
1930                 return -EOPNOTSUPP;
1931
1932         /* set enable/disable command and store wanted characteristic */
1933         if (state) {
1934                 cmd = IPA_VNICC_ENABLE;
1935                 card->options.vnicc.wanted_chars |= vnicc;
1936         } else {
1937                 cmd = IPA_VNICC_DISABLE;
1938                 card->options.vnicc.wanted_chars &= ~vnicc;
1939         }
1940
1941         /* do we need to do anything? */
1942         if (card->options.vnicc.cur_chars == card->options.vnicc.wanted_chars)
1943                 return rc;
1944
1945         /* if card is not ready, simply stop here */
1946         if (!qeth_card_hw_is_reachable(card)) {
1947                 if (state)
1948                         card->options.vnicc.cur_chars |= vnicc;
1949                 else
1950                         card->options.vnicc.cur_chars &= ~vnicc;
1951                 return rc;
1952         }
1953
1954         rc = qeth_l2_vnicc_set_char(card, vnicc, cmd);
1955         if (rc)
1956                 card->options.vnicc.wanted_chars =
1957                         card->options.vnicc.cur_chars;
1958         else {
1959                 /* successful online VNICC change; handle special cases */
1960                 if (state && vnicc == QETH_VNICC_RX_BCAST)
1961                         card->options.vnicc.rx_bcast_enabled = true;
1962                 if (!state && vnicc == QETH_VNICC_LEARNING)
1963                         qeth_l2_vnicc_recover_timeout(card, vnicc,
1964                                         &card->options.vnicc.learning_timeout);
1965         }
1966
1967         return rc;
1968 }
1969
1970 /* get current VNICC flag state; called from sysfs show function */
1971 int qeth_l2_vnicc_get_state(struct qeth_card *card, u32 vnicc, bool *state)
1972 {
1973         int rc = 0;
1974
1975         QETH_CARD_TEXT(card, 2, "vniccgch");
1976
1977         /* do not get anything if BridgePort is enabled */
1978         if (qeth_bridgeport_is_in_use(card))
1979                 return -EBUSY;
1980
1981         /* check if characteristic is supported */
1982         if (!(card->options.vnicc.sup_chars & vnicc))
1983                 return -EOPNOTSUPP;
1984
1985         /* if card is ready, query current VNICC state */
1986         if (qeth_card_hw_is_reachable(card))
1987                 rc = qeth_l2_vnicc_query_chars(card);
1988
1989         *state = (card->options.vnicc.cur_chars & vnicc) ? true : false;
1990         return rc;
1991 }
1992
1993 /* set VNICC timeout; called from sysfs store function. Currently, only learning
1994  * supports timeout
1995  */
1996 int qeth_l2_vnicc_set_timeout(struct qeth_card *card, u32 timeout)
1997 {
1998         int rc = 0;
1999
2000         QETH_CARD_TEXT(card, 2, "vniccsto");
2001
2002         /* do not change anything if BridgePort is enabled */
2003         if (qeth_bridgeport_is_in_use(card))
2004                 return -EBUSY;
2005
2006         /* check if characteristic and set_timeout are supported */
2007         if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
2008             !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
2009                 return -EOPNOTSUPP;
2010
2011         /* do we need to do anything? */
2012         if (card->options.vnicc.learning_timeout == timeout)
2013                 return rc;
2014
2015         /* if card is not ready, simply store the value internally and return */
2016         if (!qeth_card_hw_is_reachable(card)) {
2017                 card->options.vnicc.learning_timeout = timeout;
2018                 return rc;
2019         }
2020
2021         /* send timeout value to card; if successful, store value internally */
2022         rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
2023                                           IPA_VNICC_SET_TIMEOUT, &timeout);
2024         if (!rc)
2025                 card->options.vnicc.learning_timeout = timeout;
2026
2027         return rc;
2028 }
2029
2030 /* get current VNICC timeout; called from sysfs show function. Currently, only
2031  * learning supports timeout
2032  */
2033 int qeth_l2_vnicc_get_timeout(struct qeth_card *card, u32 *timeout)
2034 {
2035         int rc = 0;
2036
2037         QETH_CARD_TEXT(card, 2, "vniccgto");
2038
2039         /* do not get anything if BridgePort is enabled */
2040         if (qeth_bridgeport_is_in_use(card))
2041                 return -EBUSY;
2042
2043         /* check if characteristic and get_timeout are supported */
2044         if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
2045             !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
2046                 return -EOPNOTSUPP;
2047         /* if card is ready, get timeout. Otherwise, just return stored value */
2048         *timeout = card->options.vnicc.learning_timeout;
2049         if (qeth_card_hw_is_reachable(card))
2050                 rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
2051                                                   IPA_VNICC_GET_TIMEOUT,
2052                                                   timeout);
2053
2054         return rc;
2055 }
2056
2057 /* check if VNICC is currently enabled */
2058 bool qeth_l2_vnicc_is_in_use(struct qeth_card *card)
2059 {
2060         /* if everything is turned off, VNICC is not active */
2061         if (!card->options.vnicc.cur_chars)
2062                 return false;
2063         /* default values are only OK if rx_bcast was not enabled by user
2064          * or the card is offline.
2065          */
2066         if (card->options.vnicc.cur_chars == QETH_VNICC_DEFAULT) {
2067                 if (!card->options.vnicc.rx_bcast_enabled ||
2068                     !qeth_card_hw_is_reachable(card))
2069                         return false;
2070         }
2071         return true;
2072 }
2073
2074 /* recover user timeout setting */
2075 static bool qeth_l2_vnicc_recover_timeout(struct qeth_card *card, u32 vnicc,
2076                                           u32 *timeout)
2077 {
2078         if (card->options.vnicc.sup_chars & vnicc &&
2079             card->options.vnicc.getset_timeout_sup & vnicc &&
2080             !qeth_l2_vnicc_getset_timeout(card, vnicc, IPA_VNICC_SET_TIMEOUT,
2081                                           timeout))
2082                 return false;
2083         *timeout = QETH_VNICC_DEFAULT_TIMEOUT;
2084         return true;
2085 }
2086
2087 /* recover user characteristic setting */
2088 static bool qeth_l2_vnicc_recover_char(struct qeth_card *card, u32 vnicc,
2089                                        bool enable)
2090 {
2091         u32 cmd = enable ? IPA_VNICC_ENABLE : IPA_VNICC_DISABLE;
2092
2093         if (card->options.vnicc.sup_chars & vnicc &&
2094             card->options.vnicc.set_char_sup & vnicc &&
2095             !qeth_l2_vnicc_set_char(card, vnicc, cmd))
2096                 return false;
2097         card->options.vnicc.wanted_chars &= ~vnicc;
2098         card->options.vnicc.wanted_chars |= QETH_VNICC_DEFAULT & vnicc;
2099         return true;
2100 }
2101
2102 /* (re-)initialize VNICC */
2103 static void qeth_l2_vnicc_init(struct qeth_card *card)
2104 {
2105         u32 *timeout = &card->options.vnicc.learning_timeout;
2106         unsigned int chars_len, i;
2107         unsigned long chars_tmp;
2108         u32 sup_cmds, vnicc;
2109         bool enable, error;
2110
2111         QETH_CARD_TEXT(card, 2, "vniccini");
2112         /* reset rx_bcast */
2113         card->options.vnicc.rx_bcast_enabled = 0;
2114         /* initial query and storage of VNIC characteristics */
2115         if (qeth_l2_vnicc_query_chars(card)) {
2116                 if (card->options.vnicc.wanted_chars != QETH_VNICC_DEFAULT ||
2117                     *timeout != QETH_VNICC_DEFAULT_TIMEOUT)
2118                         dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
2119                 /* fail quietly if user didn't change the default config */
2120                 card->options.vnicc.sup_chars = 0;
2121                 card->options.vnicc.cur_chars = 0;
2122                 card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
2123                 return;
2124         }
2125         /* get supported commands for each supported characteristic */
2126         chars_tmp = card->options.vnicc.sup_chars;
2127         chars_len = sizeof(card->options.vnicc.sup_chars) * BITS_PER_BYTE;
2128         for_each_set_bit(i, &chars_tmp, chars_len) {
2129                 vnicc = BIT(i);
2130                 qeth_l2_vnicc_query_cmds(card, vnicc, &sup_cmds);
2131                 if (!(sup_cmds & IPA_VNICC_SET_TIMEOUT) ||
2132                     !(sup_cmds & IPA_VNICC_GET_TIMEOUT))
2133                         card->options.vnicc.getset_timeout_sup &= ~vnicc;
2134                 if (!(sup_cmds & IPA_VNICC_ENABLE) ||
2135                     !(sup_cmds & IPA_VNICC_DISABLE))
2136                         card->options.vnicc.set_char_sup &= ~vnicc;
2137         }
2138         /* enforce assumed default values and recover settings, if changed  */
2139         error = qeth_l2_vnicc_recover_timeout(card, QETH_VNICC_LEARNING,
2140                                               timeout);
2141         chars_tmp = card->options.vnicc.wanted_chars ^ QETH_VNICC_DEFAULT;
2142         chars_tmp |= QETH_VNICC_BRIDGE_INVISIBLE;
2143         chars_len = sizeof(card->options.vnicc.wanted_chars) * BITS_PER_BYTE;
2144         for_each_set_bit(i, &chars_tmp, chars_len) {
2145                 vnicc = BIT(i);
2146                 enable = card->options.vnicc.wanted_chars & vnicc;
2147                 error |= qeth_l2_vnicc_recover_char(card, vnicc, enable);
2148         }
2149         if (error)
2150                 dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
2151 }
2152
2153 /* configure default values of VNIC characteristics */
2154 static void qeth_l2_vnicc_set_defaults(struct qeth_card *card)
2155 {
2156         /* characteristics values */
2157         card->options.vnicc.sup_chars = QETH_VNICC_ALL;
2158         card->options.vnicc.cur_chars = QETH_VNICC_DEFAULT;
2159         card->options.vnicc.learning_timeout = QETH_VNICC_DEFAULT_TIMEOUT;
2160         /* supported commands */
2161         card->options.vnicc.set_char_sup = QETH_VNICC_ALL;
2162         card->options.vnicc.getset_timeout_sup = QETH_VNICC_LEARNING;
2163         /* settings wanted by users */
2164         card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
2165 }
2166
2167 module_init(qeth_l2_init);
2168 module_exit(qeth_l2_exit);
2169 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
2170 MODULE_DESCRIPTION("qeth layer 2 discipline");
2171 MODULE_LICENSE("GPL");