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 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 static void qeth_l2_vnicc_set_defaults(struct qeth_card *card);
  36 static void qeth_l2_vnicc_init(struct qeth_card *card);
  37 static bool qeth_l2_vnicc_recover_timeout(struct qeth_card *card, u32 vnicc,
  38                                           u32 *timeout);
  39
  40 static struct net_device *qeth_l2_netdev_by_devno(unsigned char *read_dev_no)
  41 {
  42         struct qeth_card *card;
  43         struct net_device *ndev;
  44         __u16 temp_dev_no;
  45         unsigned long flags;
  46         struct ccw_dev_id read_devid;
  47
  48         ndev = NULL;
  49         memcpy(&temp_dev_no, read_dev_no, 2);
  50         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
  51         list_for_each_entry(card, &qeth_core_card_list.list, list) {
  52                 ccw_device_get_id(CARD_RDEV(card), &read_devid);
  53                 if (read_devid.devno == temp_dev_no) {
  54                         ndev = card->dev;
  55                         break;
  56                 }
  57         }
  58         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
  59         return ndev;
  60 }
  61
  62 static int qeth_setdelmac_makerc(struct qeth_card *card, int retcode)
  63 {
  64         int rc;
  65
  66         if (retcode)
  67                 QETH_CARD_TEXT_(card, 2, "err%04x", retcode);
  68         switch (retcode) {
  69         case IPA_RC_SUCCESS:
  70                 rc = 0;
  71                 break;
  72         case IPA_RC_L2_UNSUPPORTED_CMD:
  73                 rc = -EOPNOTSUPP;
  74                 break;
  75         case IPA_RC_L2_ADDR_TABLE_FULL:
  76                 rc = -ENOSPC;
  77                 break;
  78         case IPA_RC_L2_DUP_MAC:
  79         case IPA_RC_L2_DUP_LAYER3_MAC:
  80                 rc = -EEXIST;
  81                 break;
  82         case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
  83         case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
  84                 rc = -EPERM;
  85                 break;
  86         case IPA_RC_L2_MAC_NOT_FOUND:
  87                 rc = -ENOENT;
  88                 break;
  89         case -ENOMEM:
  90                 rc = -ENOMEM;
  91                 break;
  92         default:
  93                 rc = -EIO;
  94                 break;
  95         }
  96         return rc;
  97 }
  98
  99 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
 100                            enum qeth_ipa_cmds ipacmd)
 101 {
 102         struct qeth_ipa_cmd *cmd;
 103         struct qeth_cmd_buffer *iob;
 104
 105         QETH_CARD_TEXT(card, 2, "L2sdmac");
 106         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 107         if (!iob)
 108                 return -ENOMEM;
 109         cmd = __ipa_cmd(iob);
 110         cmd->data.setdelmac.mac_length = ETH_ALEN;
 111         ether_addr_copy(cmd->data.setdelmac.mac, mac);
 112         return qeth_setdelmac_makerc(card, qeth_send_ipa_cmd(card, iob,
 113                                            NULL, NULL));
 114 }
 115
 116 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
 117 {
 118         int rc;
 119
 120         QETH_CARD_TEXT(card, 2, "L2Setmac");
 121         rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC);
 122         if (rc == 0) {
 123                 dev_info(&card->gdev->dev,
 124                          "MAC address %pM successfully registered on device %s\n",
 125                          mac, card->dev->name);
 126         } else {
 127                 switch (rc) {
 128                 case -EEXIST:
 129                         dev_warn(&card->gdev->dev,
 130                                 "MAC address %pM already exists\n", mac);
 131                         break;
 132                 case -EPERM:
 133                         dev_warn(&card->gdev->dev,
 134                                 "MAC address %pM is not authorized\n", mac);
 135                         break;
 136                 }
 137         }
 138         return rc;
 139 }
 140
 141 static int qeth_l2_write_mac(struct qeth_card *card, u8 *mac)
 142 {
 143         enum qeth_ipa_cmds cmd = is_multicast_ether_addr_64bits(mac) ?
 144                                         IPA_CMD_SETGMAC : IPA_CMD_SETVMAC;
 145         int rc;
 146
 147         QETH_CARD_TEXT(card, 2, "L2Wmac");
 148         rc = qeth_l2_send_setdelmac(card, mac, cmd);
 149         if (rc == -EEXIST)
 150                 QETH_DBF_MESSAGE(2, "MAC %pM already registered on %s\n",
 151                                  mac, QETH_CARD_IFNAME(card));
 152         else if (rc)
 153                 QETH_DBF_MESSAGE(2, "Failed to register MAC %pM on %s: %d\n",
 154                                  mac, QETH_CARD_IFNAME(card), rc);
 155         return rc;
 156 }
 157
 158 static int qeth_l2_remove_mac(struct qeth_card *card, u8 *mac)
 159 {
 160         enum qeth_ipa_cmds cmd = is_multicast_ether_addr_64bits(mac) ?
 161                                         IPA_CMD_DELGMAC : IPA_CMD_DELVMAC;
 162         int rc;
 163
 164         QETH_CARD_TEXT(card, 2, "L2Rmac");
 165         rc = qeth_l2_send_setdelmac(card, mac, cmd);
 166         if (rc)
 167                 QETH_DBF_MESSAGE(2, "Failed to delete MAC %pM on %s: %d\n",
 168                                  mac, QETH_CARD_IFNAME(card), rc);
 169         return rc;
 170 }
 171
 172 static void qeth_l2_del_all_macs(struct qeth_card *card)
 173 {
 174         struct qeth_mac *mac;
 175         struct hlist_node *tmp;
 176         int i;
 177
 178         spin_lock_bh(&card->mclock);
 179         hash_for_each_safe(card->mac_htable, i, tmp, mac, hnode) {
 180                 hash_del(&mac->hnode);
 181                 kfree(mac);
 182         }
 183         spin_unlock_bh(&card->mclock);
 184 }
 185
 186 static int qeth_l2_get_cast_type(struct qeth_card *card, struct sk_buff *skb)
 187 {
 188         if (card->info.type == QETH_CARD_TYPE_OSN)
 189                 return RTN_UNSPEC;
 190         if (is_broadcast_ether_addr(skb->data))
 191                 return RTN_BROADCAST;
 192         if (is_multicast_ether_addr(skb->data))
 193                 return RTN_MULTICAST;
 194         return RTN_UNSPEC;
 195 }
 196
 197 static void qeth_l2_fill_header(struct qeth_hdr *hdr, struct sk_buff *skb,
 198                                 int cast_type, unsigned int data_len)
 199 {
 200         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
 201
 202         memset(hdr, 0, sizeof(struct qeth_hdr));
 203         hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
 204         hdr->hdr.l2.pkt_length = data_len;
 205
 206         /* set byte byte 3 to casting flags */
 207         if (cast_type == RTN_MULTICAST)
 208                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 209         else if (cast_type == RTN_BROADCAST)
 210                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 211         else
 212                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 213
 214         /* VSWITCH relies on the VLAN
 215          * information to be present in
 216          * the QDIO header */
 217         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
 218                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
 219                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
 220         }
 221 }
 222
 223 static int qeth_setdelvlan_makerc(struct qeth_card *card, int retcode)
 224 {
 225         if (retcode)
 226                 QETH_CARD_TEXT_(card, 2, "err%04x", retcode);
 227
 228         switch (retcode) {
 229         case IPA_RC_SUCCESS:
 230                 return 0;
 231         case IPA_RC_L2_INVALID_VLAN_ID:
 232                 return -EINVAL;
 233         case IPA_RC_L2_DUP_VLAN_ID:
 234                 return -EEXIST;
 235         case IPA_RC_L2_VLAN_ID_NOT_FOUND:
 236                 return -ENOENT;
 237         case IPA_RC_L2_VLAN_ID_NOT_ALLOWED:
 238                 return -EPERM;
 239         case -ENOMEM:
 240                 return -ENOMEM;
 241         default:
 242                 return -EIO;
 243         }
 244 }
 245
 246 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
 247                                       struct qeth_reply *reply,
 248                                       unsigned long data)
 249 {
 250         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
 251
 252         QETH_CARD_TEXT(card, 2, "L2sdvcb");
 253         if (cmd->hdr.return_code) {
 254                 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x.\n",
 255                                  cmd->data.setdelvlan.vlan_id,
 256                                  QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 257                 QETH_CARD_TEXT_(card, 2, "L2VL%4x", cmd->hdr.command);
 258                 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code);
 259         }
 260         return 0;
 261 }
 262
 263 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
 264                                    enum qeth_ipa_cmds ipacmd)
 265 {
 266         struct qeth_ipa_cmd *cmd;
 267         struct qeth_cmd_buffer *iob;
 268
 269         QETH_CARD_TEXT_(card, 4, "L2sdv%x", ipacmd);
 270         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 271         if (!iob)
 272                 return -ENOMEM;
 273         cmd = __ipa_cmd(iob);
 274         cmd->data.setdelvlan.vlan_id = i;
 275         return qeth_setdelvlan_makerc(card, qeth_send_ipa_cmd(card, iob,
 276                                             qeth_l2_send_setdelvlan_cb, NULL));
 277 }
 278
 279 static void qeth_l2_process_vlans(struct qeth_card *card)
 280 {
 281         struct qeth_vlan_vid *id;
 282
 283         QETH_CARD_TEXT(card, 3, "L2prcvln");
 284         mutex_lock(&card->vid_list_mutex);
 285         list_for_each_entry(id, &card->vid_list, list) {
 286                 qeth_l2_send_setdelvlan(card, id->vid, IPA_CMD_SETVLAN);
 287         }
 288         mutex_unlock(&card->vid_list_mutex);
 289 }
 290
 291 static int qeth_l2_vlan_rx_add_vid(struct net_device *dev,
 292                                    __be16 proto, u16 vid)
 293 {
 294         struct qeth_card *card = dev->ml_priv;
 295         struct qeth_vlan_vid *id;
 296         int rc;
 297
 298         QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
 299         if (!vid)
 300                 return 0;
 301         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 302                 QETH_CARD_TEXT(card, 3, "aidREC");
 303                 return 0;
 304         }
 305         id = kmalloc(sizeof(*id), GFP_KERNEL);
 306         if (id) {
 307                 id->vid = vid;
 308                 rc = qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
 309                 if (rc) {
 310                         kfree(id);
 311                         return rc;
 312                 }
 313                 mutex_lock(&card->vid_list_mutex);
 314                 list_add_tail(&id->list, &card->vid_list);
 315                 mutex_unlock(&card->vid_list_mutex);
 316         } else {
 317                 return -ENOMEM;
 318         }
 319         return 0;
 320 }
 321
 322 static int qeth_l2_vlan_rx_kill_vid(struct net_device *dev,
 323                                     __be16 proto, u16 vid)
 324 {
 325         struct qeth_vlan_vid *id, *tmpid = NULL;
 326         struct qeth_card *card = dev->ml_priv;
 327         int rc = 0;
 328
 329         QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
 330         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 331                 QETH_CARD_TEXT(card, 3, "kidREC");
 332                 return 0;
 333         }
 334         mutex_lock(&card->vid_list_mutex);
 335         list_for_each_entry(id, &card->vid_list, list) {
 336                 if (id->vid == vid) {
 337                         list_del(&id->list);
 338                         tmpid = id;
 339                         break;
 340                 }
 341         }
 342         mutex_unlock(&card->vid_list_mutex);
 343         if (tmpid) {
 344                 rc = qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 345                 kfree(tmpid);
 346         }
 347         qeth_l2_set_rx_mode(card->dev);
 348         return rc;
 349 }
 350
 351 static void qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
 352 {
 353         QETH_DBF_TEXT(SETUP , 2, "stopcard");
 354         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 355
 356         qeth_set_allowed_threads(card, 0, 1);
 357         if (card->read.state == CH_STATE_UP &&
 358             card->write.state == CH_STATE_UP &&
 359             (card->state == CARD_STATE_UP)) {
 360                 if (recovery_mode &&
 361                     card->info.type != QETH_CARD_TYPE_OSN) {
 362                         qeth_l2_stop(card->dev);
 363                 } else {
 364                         rtnl_lock();
 365                         dev_close(card->dev);
 366                         rtnl_unlock();
 367                 }
 368                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 369                 card->state = CARD_STATE_SOFTSETUP;
 370         }
 371         if (card->state == CARD_STATE_SOFTSETUP) {
 372                 qeth_l2_del_all_macs(card);
 373                 qeth_clear_ipacmd_list(card);
 374                 card->state = CARD_STATE_HARDSETUP;
 375         }
 376         if (card->state == CARD_STATE_HARDSETUP) {
 377                 qeth_qdio_clear_card(card, 0);
 378                 qeth_clear_qdio_buffers(card);
 379                 qeth_clear_working_pool_list(card);
 380                 card->state = CARD_STATE_DOWN;
 381         }
 382         if (card->state == CARD_STATE_DOWN) {
 383                 qeth_clear_cmd_buffers(&card->read);
 384                 qeth_clear_cmd_buffers(&card->write);
 385         }
 386 }
 387
 388 static int qeth_l2_process_inbound_buffer(struct qeth_card *card,
 389                                 int budget, int *done)
 390 {
 391         int work_done = 0;
 392         struct sk_buff *skb;
 393         struct qeth_hdr *hdr;
 394         unsigned int len;
 395
 396         *done = 0;
 397         WARN_ON_ONCE(!budget);
 398         while (budget) {
 399                 skb = qeth_core_get_next_skb(card,
 400                         &card->qdio.in_q->bufs[card->rx.b_index],
 401                         &card->rx.b_element, &card->rx.e_offset, &hdr);
 402                 if (!skb) {
 403                         *done = 1;
 404                         break;
 405                 }
 406                 switch (hdr->hdr.l2.id) {
 407                 case QETH_HEADER_TYPE_LAYER2:
 408                         skb->protocol = eth_type_trans(skb, skb->dev);
 409                         qeth_rx_csum(card, skb, hdr->hdr.l2.flags[1]);
 410                         if (skb->protocol == htons(ETH_P_802_2))
 411                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
 412                         len = skb->len;
 413                         napi_gro_receive(&card->napi, skb);
 414                         break;
 415                 case QETH_HEADER_TYPE_OSN:
 416                         if (card->info.type == QETH_CARD_TYPE_OSN) {
 417                                 skb_push(skb, sizeof(struct qeth_hdr));
 418                                 skb_copy_to_linear_data(skb, hdr,
 419                                                 sizeof(struct qeth_hdr));
 420                                 len = skb->len;
 421                                 card->osn_info.data_cb(skb);
 422                                 break;
 423                         }
 424                         /* else unknown */
 425                 default:
 426                         dev_kfree_skb_any(skb);
 427                         QETH_CARD_TEXT(card, 3, "inbunkno");
 428                         QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
 429                         continue;
 430                 }
 431                 work_done++;
 432                 budget--;
 433                 card->stats.rx_packets++;
 434                 card->stats.rx_bytes += len;
 435         }
 436         return work_done;
 437 }
 438
 439 static int qeth_l2_request_initial_mac(struct qeth_card *card)
 440 {
 441         int rc = 0;
 442
 443         QETH_DBF_TEXT(SETUP, 2, "l2reqmac");
 444         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
 445
 446         if (MACHINE_IS_VM) {
 447                 rc = qeth_vm_request_mac(card);
 448                 if (!rc)
 449                         goto out;
 450                 QETH_DBF_MESSAGE(2, "z/VM MAC Service failed on device %s: x%x\n",
 451                                  CARD_BUS_ID(card), rc);
 452                 QETH_DBF_TEXT_(SETUP, 2, "err%04x", rc);
 453                 /* fall back to alternative mechanism: */
 454         }
 455
 456         if (card->info.type == QETH_CARD_TYPE_IQD ||
 457             card->info.type == QETH_CARD_TYPE_OSM ||
 458             card->info.type == QETH_CARD_TYPE_OSX ||
 459             card->info.guestlan) {
 460                 rc = qeth_setadpparms_change_macaddr(card);
 461                 if (!rc)
 462                         goto out;
 463                 QETH_DBF_MESSAGE(2, "READ_MAC Assist failed on device %s: x%x\n",
 464                                  CARD_BUS_ID(card), rc);
 465                 QETH_DBF_TEXT_(SETUP, 2, "1err%04x", rc);
 466                 /* fall back once more: */
 467         }
 468
 469         /* some devices don't support a custom MAC address: */
 470         if (card->info.type == QETH_CARD_TYPE_OSM ||
 471             card->info.type == QETH_CARD_TYPE_OSX)
 472                 return (rc) ? rc : -EADDRNOTAVAIL;
 473         eth_hw_addr_random(card->dev);
 474
 475 out:
 476         QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, card->dev->addr_len);
 477         return 0;
 478 }
 479
 480 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 481 {
 482         struct sockaddr *addr = p;
 483         struct qeth_card *card = dev->ml_priv;
 484         u8 old_addr[ETH_ALEN];
 485         int rc = 0;
 486
 487         QETH_CARD_TEXT(card, 3, "setmac");
 488
 489         if (card->info.type == QETH_CARD_TYPE_OSN ||
 490             card->info.type == QETH_CARD_TYPE_OSM ||
 491             card->info.type == QETH_CARD_TYPE_OSX) {
 492                 QETH_CARD_TEXT(card, 3, "setmcTYP");
 493                 return -EOPNOTSUPP;
 494         }
 495         QETH_CARD_HEX(card, 3, addr->sa_data, ETH_ALEN);
 496         if (!is_valid_ether_addr(addr->sa_data))
 497                 return -EADDRNOTAVAIL;
 498
 499         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 500                 QETH_CARD_TEXT(card, 3, "setmcREC");
 501                 return -ERESTARTSYS;
 502         }
 503
 504         if (!qeth_card_hw_is_reachable(card)) {
 505                 ether_addr_copy(dev->dev_addr, addr->sa_data);
 506                 return 0;
 507         }
 508
 509         /* don't register the same address twice */
 510         if (ether_addr_equal_64bits(dev->dev_addr, addr->sa_data) &&
 511             (card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
 512                 return 0;
 513
 514         /* add the new address, switch over, drop the old */
 515         rc = qeth_l2_send_setmac(card, addr->sa_data);
 516         if (rc)
 517                 return rc;
 518         ether_addr_copy(old_addr, dev->dev_addr);
 519         ether_addr_copy(dev->dev_addr, addr->sa_data);
 520
 521         if (card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED)
 522                 qeth_l2_remove_mac(card, old_addr);
 523         card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 524         return 0;
 525 }
 526
 527 static void qeth_promisc_to_bridge(struct qeth_card *card)
 528 {
 529         struct net_device *dev = card->dev;
 530         enum qeth_ipa_promisc_modes promisc_mode;
 531         int role;
 532         int rc;
 533
 534         QETH_CARD_TEXT(card, 3, "pmisc2br");
 535
 536         if (!card->options.sbp.reflect_promisc)
 537                 return;
 538         promisc_mode = (dev->flags & IFF_PROMISC) ? SET_PROMISC_MODE_ON
 539                                                 : SET_PROMISC_MODE_OFF;
 540         if (promisc_mode == card->info.promisc_mode)
 541                 return;
 542
 543         if (promisc_mode == SET_PROMISC_MODE_ON) {
 544                 if (card->options.sbp.reflect_promisc_primary)
 545                         role = QETH_SBP_ROLE_PRIMARY;
 546                 else
 547                         role = QETH_SBP_ROLE_SECONDARY;
 548         } else
 549                 role = QETH_SBP_ROLE_NONE;
 550
 551         rc = qeth_bridgeport_setrole(card, role);
 552         QETH_DBF_TEXT_(SETUP, 2, "bpm%c%04x",
 553                         (promisc_mode == SET_PROMISC_MODE_ON) ? '+' : '-', rc);
 554         if (!rc) {
 555                 card->options.sbp.role = role;
 556                 card->info.promisc_mode = promisc_mode;
 557         }
 558
 559 }
 560 /* New MAC address is added to the hash table and marked to be written on card
 561  * only if there is not in the hash table storage already
 562  *
 563 */
 564 static void qeth_l2_add_mac(struct qeth_card *card, struct netdev_hw_addr *ha)
 565 {
 566         u32 mac_hash = get_unaligned((u32 *)(&ha->addr[2]));
 567         struct qeth_mac *mac;
 568
 569         hash_for_each_possible(card->mac_htable, mac, hnode, mac_hash) {
 570                 if (ether_addr_equal_64bits(ha->addr, mac->mac_addr)) {
 571                         mac->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
 572                         return;
 573                 }
 574         }
 575
 576         mac = kzalloc(sizeof(struct qeth_mac), GFP_ATOMIC);
 577         if (!mac)
 578                 return;
 579
 580         ether_addr_copy(mac->mac_addr, ha->addr);
 581         mac->disp_flag = QETH_DISP_ADDR_ADD;
 582
 583         hash_add(card->mac_htable, &mac->hnode, mac_hash);
 584 }
 585
 586 static void qeth_l2_set_rx_mode(struct net_device *dev)
 587 {
 588         struct qeth_card *card = dev->ml_priv;
 589         struct netdev_hw_addr *ha;
 590         struct qeth_mac *mac;
 591         struct hlist_node *tmp;
 592         int i;
 593         int rc;
 594
 595         if (card->info.type == QETH_CARD_TYPE_OSN)
 596                 return;
 597
 598         QETH_CARD_TEXT(card, 3, "setmulti");
 599         if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
 600             (card->state != CARD_STATE_UP))
 601                 return;
 602
 603         spin_lock_bh(&card->mclock);
 604
 605         netdev_for_each_mc_addr(ha, dev)
 606                 qeth_l2_add_mac(card, ha);
 607         netdev_for_each_uc_addr(ha, dev)
 608                 qeth_l2_add_mac(card, ha);
 609
 610         hash_for_each_safe(card->mac_htable, i, tmp, mac, hnode) {
 611                 switch (mac->disp_flag) {
 612                 case QETH_DISP_ADDR_DELETE:
 613                         qeth_l2_remove_mac(card, mac->mac_addr);
 614                         hash_del(&mac->hnode);
 615                         kfree(mac);
 616                         break;
 617                 case QETH_DISP_ADDR_ADD:
 618                         rc = qeth_l2_write_mac(card, mac->mac_addr);
 619                         if (rc) {
 620                                 hash_del(&mac->hnode);
 621                                 kfree(mac);
 622                                 break;
 623                         }
 624                         /* fall through */
 625                 default:
 626                         /* for next call to set_rx_mode(): */
 627                         mac->disp_flag = QETH_DISP_ADDR_DELETE;
 628                 }
 629         }
 630
 631         spin_unlock_bh(&card->mclock);
 632
 633         if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
 634                 qeth_setadp_promisc_mode(card);
 635         else
 636                 qeth_promisc_to_bridge(card);
 637 }
 638
 639 static int qeth_l2_xmit_iqd(struct qeth_card *card, struct sk_buff *skb,
 640                             struct qeth_qdio_out_q *queue, int cast_type)
 641 {
 642         unsigned int data_offset = ETH_HLEN;
 643         struct qeth_hdr *hdr;
 644         int rc;
 645
 646         hdr = kmem_cache_alloc(qeth_core_header_cache, GFP_ATOMIC);
 647         if (!hdr)
 648                 return -ENOMEM;
 649         qeth_l2_fill_header(hdr, skb, cast_type, skb->len);
 650         skb_copy_from_linear_data(skb, ((char *)hdr) + sizeof(*hdr),
 651                                   data_offset);
 652
 653         if (!qeth_get_elements_no(card, skb, 1, data_offset)) {
 654                 rc = -E2BIG;
 655                 goto out;
 656         }
 657         rc = qeth_do_send_packet_fast(queue, skb, hdr, data_offset,
 658                                       sizeof(*hdr) + data_offset);
 659 out:
 660         if (rc)
 661                 kmem_cache_free(qeth_core_header_cache, hdr);
 662         return rc;
 663 }
 664
 665 static int qeth_l2_xmit_osa(struct qeth_card *card, struct sk_buff *skb,
 666                             struct qeth_qdio_out_q *queue, int cast_type,
 667                             int ipv)
 668 {
 669         int push_len = sizeof(struct qeth_hdr);
 670         unsigned int elements, nr_frags;
 671         unsigned int hdr_elements = 0;
 672         struct qeth_hdr *hdr = NULL;
 673         unsigned int hd_len = 0;
 674         int rc;
 675
 676         /* fix hardware limitation: as long as we do not have sbal
 677          * chaining we can not send long frag lists
 678          */
 679         if (!qeth_get_elements_no(card, skb, 0, 0)) {
 680                 rc = skb_linearize(skb);
 681
 682                 if (card->options.performance_stats) {
 683                         if (rc)
 684                                 card->perf_stats.tx_linfail++;
 685                         else
 686                                 card->perf_stats.tx_lin++;
 687                 }
 688                 if (rc)
 689                         return rc;
 690         }
 691         nr_frags = skb_shinfo(skb)->nr_frags;
 692
 693         rc = skb_cow_head(skb, push_len);
 694         if (rc)
 695                 return rc;
 696         push_len = qeth_push_hdr(skb, &hdr, push_len);
 697         if (push_len < 0)
 698                 return push_len;
 699         if (!push_len) {
 700                 /* hdr was allocated from cache */
 701                 hd_len = sizeof(*hdr);
 702                 hdr_elements = 1;
 703         }
 704         qeth_l2_fill_header(hdr, skb, cast_type, skb->len - push_len);
 705         if (skb->ip_summed == CHECKSUM_PARTIAL) {
 706                 qeth_tx_csum(skb, &hdr->hdr.l2.flags[1], ipv);
 707                 if (card->options.performance_stats)
 708                         card->perf_stats.tx_csum++;
 709         }
 710
 711         elements = qeth_get_elements_no(card, skb, hdr_elements, 0);
 712         if (!elements) {
 713                 rc = -E2BIG;
 714                 goto out;
 715         }
 716         elements += hdr_elements;
 717
 718         /* TODO: remove the skb_orphan() once TX completion is fast enough */
 719         skb_orphan(skb);
 720         rc = qeth_do_send_packet(card, queue, skb, hdr, 0, hd_len, elements);
 721 out:
 722         if (!rc) {
 723                 if (card->options.performance_stats && nr_frags) {
 724                         card->perf_stats.sg_skbs_sent++;
 725                         /* nr_frags + skb->data */
 726                         card->perf_stats.sg_frags_sent += nr_frags + 1;
 727                 }
 728         } else {
 729                 if (hd_len)
 730                         kmem_cache_free(qeth_core_header_cache, hdr);
 731                 if (rc == -EBUSY)
 732                         /* roll back to ETH header */
 733                         skb_pull(skb, push_len);
 734         }
 735         return rc;
 736 }
 737
 738 static int qeth_l2_xmit_osn(struct qeth_card *card, struct sk_buff *skb,
 739                             struct qeth_qdio_out_q *queue)
 740 {
 741         unsigned int elements;
 742         struct qeth_hdr *hdr;
 743
 744         if (skb->protocol == htons(ETH_P_IPV6))
 745                 return -EPROTONOSUPPORT;
 746
 747         hdr = (struct qeth_hdr *)skb->data;
 748         elements = qeth_get_elements_no(card, skb, 0, 0);
 749         if (!elements)
 750                 return -E2BIG;
 751         if (qeth_hdr_chk_and_bounce(skb, &hdr, sizeof(*hdr)))
 752                 return -EINVAL;
 753         return qeth_do_send_packet(card, queue, skb, hdr, 0, 0, elements);
 754 }
 755
 756 static netdev_tx_t qeth_l2_hard_start_xmit(struct sk_buff *skb,
 757                                            struct net_device *dev)
 758 {
 759         struct qeth_card *card = dev->ml_priv;
 760         int cast_type = qeth_l2_get_cast_type(card, skb);
 761         int ipv = qeth_get_ip_version(skb);
 762         struct qeth_qdio_out_q *queue;
 763         int tx_bytes = skb->len;
 764         int rc;
 765
 766         if (card->qdio.do_prio_queueing || (cast_type &&
 767                                         card->info.is_multicast_different))
 768                 queue = card->qdio.out_qs[qeth_get_priority_queue(card, skb,
 769                                         ipv, cast_type)];
 770         else
 771                 queue = card->qdio.out_qs[card->qdio.default_out_queue];
 772
 773         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
 774                 card->stats.tx_carrier_errors++;
 775                 goto tx_drop;
 776         }
 777
 778         if (card->options.performance_stats) {
 779                 card->perf_stats.outbound_cnt++;
 780                 card->perf_stats.outbound_start_time = qeth_get_micros();
 781         }
 782         netif_stop_queue(dev);
 783
 784         switch (card->info.type) {
 785         case QETH_CARD_TYPE_OSN:
 786                 rc = qeth_l2_xmit_osn(card, skb, queue);
 787                 break;
 788         case QETH_CARD_TYPE_IQD:
 789                 rc = qeth_l2_xmit_iqd(card, skb, queue, cast_type);
 790                 break;
 791         default:
 792                 rc = qeth_l2_xmit_osa(card, skb, queue, cast_type, ipv);
 793         }
 794
 795         if (!rc) {
 796                 card->stats.tx_packets++;
 797                 card->stats.tx_bytes += tx_bytes;
 798                 if (card->options.performance_stats)
 799                         card->perf_stats.outbound_time += qeth_get_micros() -
 800                                 card->perf_stats.outbound_start_time;
 801                 netif_wake_queue(dev);
 802                 return NETDEV_TX_OK;
 803         } else if (rc == -EBUSY) {
 804                 return NETDEV_TX_BUSY;
 805         } /* else fall through */
 806
 807 tx_drop:
 808         card->stats.tx_dropped++;
 809         card->stats.tx_errors++;
 810         dev_kfree_skb_any(skb);
 811         netif_wake_queue(dev);
 812         return NETDEV_TX_OK;
 813 }
 814
 815 static int __qeth_l2_open(struct net_device *dev)
 816 {
 817         struct qeth_card *card = dev->ml_priv;
 818         int rc = 0;
 819
 820         QETH_CARD_TEXT(card, 4, "qethopen");
 821         if (card->state == CARD_STATE_UP)
 822                 return rc;
 823         if (card->state != CARD_STATE_SOFTSETUP)
 824                 return -ENODEV;
 825
 826         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
 827              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
 828                 QETH_CARD_TEXT(card, 4, "nomacadr");
 829                 return -EPERM;
 830         }
 831         card->data.state = CH_STATE_UP;
 832         card->state = CARD_STATE_UP;
 833         netif_start_queue(dev);
 834
 835         if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) {
 836                 napi_enable(&card->napi);
 837                 napi_schedule(&card->napi);
 838         } else
 839                 rc = -EIO;
 840         return rc;
 841 }
 842
 843 static int qeth_l2_open(struct net_device *dev)
 844 {
 845         struct qeth_card *card = dev->ml_priv;
 846
 847         QETH_CARD_TEXT(card, 5, "qethope_");
 848         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 849                 QETH_CARD_TEXT(card, 3, "openREC");
 850                 return -ERESTARTSYS;
 851         }
 852         return __qeth_l2_open(dev);
 853 }
 854
 855 static int qeth_l2_stop(struct net_device *dev)
 856 {
 857         struct qeth_card *card = dev->ml_priv;
 858
 859         QETH_CARD_TEXT(card, 4, "qethstop");
 860         netif_tx_disable(dev);
 861         if (card->state == CARD_STATE_UP) {
 862                 card->state = CARD_STATE_SOFTSETUP;
 863                 napi_disable(&card->napi);
 864         }
 865         return 0;
 866 }
 867
 868 static const struct device_type qeth_l2_devtype = {
 869         .name = "qeth_layer2",
 870         .groups = qeth_l2_attr_groups,
 871 };
 872
 873 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 874 {
 875         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 876         int rc;
 877
 878         if (gdev->dev.type == &qeth_generic_devtype) {
 879                 rc = qeth_l2_create_device_attributes(&gdev->dev);
 880                 if (rc)
 881                         return rc;
 882         }
 883         INIT_LIST_HEAD(&card->vid_list);
 884         hash_init(card->mac_htable);
 885         card->options.layer2 = 1;
 886         card->info.hwtrap = 0;
 887         qeth_l2_vnicc_set_defaults(card);
 888         return 0;
 889 }
 890
 891 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
 892 {
 893         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
 894
 895         if (cgdev->dev.type == &qeth_generic_devtype)
 896                 qeth_l2_remove_device_attributes(&cgdev->dev);
 897         qeth_set_allowed_threads(card, 0, 1);
 898         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 899
 900         if (cgdev->state == CCWGROUP_ONLINE)
 901                 qeth_l2_set_offline(cgdev);
 902
 903         if (card->dev) {
 904                 unregister_netdev(card->dev);
 905                 free_netdev(card->dev);
 906                 card->dev = NULL;
 907         }
 908         return;
 909 }
 910
 911 static const struct ethtool_ops qeth_l2_ethtool_ops = {
 912         .get_link = ethtool_op_get_link,
 913         .get_strings = qeth_core_get_strings,
 914         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 915         .get_sset_count = qeth_core_get_sset_count,
 916         .get_drvinfo = qeth_core_get_drvinfo,
 917         .get_link_ksettings = qeth_core_ethtool_get_link_ksettings,
 918 };
 919
 920 static const struct ethtool_ops qeth_l2_osn_ops = {
 921         .get_strings = qeth_core_get_strings,
 922         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 923         .get_sset_count = qeth_core_get_sset_count,
 924         .get_drvinfo = qeth_core_get_drvinfo,
 925 };
 926
 927 static const struct net_device_ops qeth_l2_netdev_ops = {
 928         .ndo_open               = qeth_l2_open,
 929         .ndo_stop               = qeth_l2_stop,
 930         .ndo_get_stats          = qeth_get_stats,
 931         .ndo_start_xmit         = qeth_l2_hard_start_xmit,
 932         .ndo_features_check     = qeth_features_check,
 933         .ndo_validate_addr      = eth_validate_addr,
 934         .ndo_set_rx_mode        = qeth_l2_set_rx_mode,
 935         .ndo_do_ioctl           = qeth_do_ioctl,
 936         .ndo_set_mac_address    = qeth_l2_set_mac_address,
 937         .ndo_change_mtu         = qeth_change_mtu,
 938         .ndo_vlan_rx_add_vid    = qeth_l2_vlan_rx_add_vid,
 939         .ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,
 940         .ndo_tx_timeout         = qeth_tx_timeout,
 941         .ndo_fix_features       = qeth_fix_features,
 942         .ndo_set_features       = qeth_set_features
 943 };
 944
 945 static int qeth_l2_setup_netdev(struct qeth_card *card)
 946 {
 947         switch (card->info.type) {
 948         case QETH_CARD_TYPE_IQD:
 949                 card->dev = alloc_netdev(0, "hsi%d", NET_NAME_UNKNOWN,
 950                                          ether_setup);
 951                 break;
 952         case QETH_CARD_TYPE_OSN:
 953                 card->dev = alloc_netdev(0, "osn%d", NET_NAME_UNKNOWN,
 954                                          ether_setup);
 955                 break;
 956         default:
 957                 card->dev = alloc_etherdev(0);
 958         }
 959
 960         if (!card->dev)
 961                 return -ENODEV;
 962
 963         card->dev->ml_priv = card;
 964         card->dev->priv_flags |= IFF_UNICAST_FLT;
 965         card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
 966         card->dev->mtu = card->info.initial_mtu;
 967         card->dev->min_mtu = 64;
 968         card->dev->max_mtu = ETH_MAX_MTU;
 969         card->dev->dev_port = card->info.portno;
 970         card->dev->netdev_ops = &qeth_l2_netdev_ops;
 971         if (card->info.type == QETH_CARD_TYPE_OSN) {
 972                 card->dev->ethtool_ops = &qeth_l2_osn_ops;
 973                 card->dev->flags |= IFF_NOARP;
 974         } else {
 975                 card->dev->ethtool_ops = &qeth_l2_ethtool_ops;
 976         }
 977
 978         if (card->info.type == QETH_CARD_TYPE_OSM)
 979                 card->dev->features |= NETIF_F_VLAN_CHALLENGED;
 980         else
 981                 card->dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
 982
 983         if (card->info.type != QETH_CARD_TYPE_OSN &&
 984             card->info.type != QETH_CARD_TYPE_IQD) {
 985                 card->dev->priv_flags &= ~IFF_TX_SKB_SHARING;
 986                 card->dev->needed_headroom = sizeof(struct qeth_hdr);
 987                 card->dev->hw_features |= NETIF_F_SG;
 988                 card->dev->vlan_features |= NETIF_F_SG;
 989         }
 990
 991         if (card->info.type == QETH_CARD_TYPE_OSD && !card->info.guestlan) {
 992                 card->dev->features |= NETIF_F_SG;
 993                 /* OSA 3S and earlier has no RX/TX support */
 994                 if (qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM)) {
 995                         card->dev->hw_features |= NETIF_F_IP_CSUM;
 996                         card->dev->vlan_features |= NETIF_F_IP_CSUM;
 997                 }
 998         }
 999         if (qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) {
1000                 card->dev->hw_features |= NETIF_F_IPV6_CSUM;
1001                 card->dev->vlan_features |= NETIF_F_IPV6_CSUM;
1002         }
1003         if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM) ||
1004             qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6)) {
1005                 card->dev->hw_features |= NETIF_F_RXCSUM;
1006                 card->dev->vlan_features |= NETIF_F_RXCSUM;
1007         }
1008
1009         card->info.broadcast_capable = 1;
1010         qeth_l2_request_initial_mac(card);
1011         SET_NETDEV_DEV(card->dev, &card->gdev->dev);
1012         netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT);
1013         netif_carrier_off(card->dev);
1014         return register_netdev(card->dev);
1015 }
1016
1017 static int qeth_l2_start_ipassists(struct qeth_card *card)
1018 {
1019         /* configure isolation level */
1020         if (qeth_set_access_ctrl_online(card, 0))
1021                 return -ENODEV;
1022         return 0;
1023 }
1024
1025 static void qeth_l2_trace_features(struct qeth_card *card)
1026 {
1027         /* Set BridgePort features */
1028         QETH_CARD_TEXT(card, 2, "featuSBP");
1029         QETH_CARD_HEX(card, 2, &card->options.sbp.supported_funcs,
1030                       sizeof(card->options.sbp.supported_funcs));
1031         /* VNIC Characteristics features */
1032         QETH_CARD_TEXT(card, 2, "feaVNICC");
1033         QETH_CARD_HEX(card, 2, &card->options.vnicc.sup_chars,
1034                       sizeof(card->options.vnicc.sup_chars));
1035 }
1036
1037 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
1038 {
1039         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1040         int rc = 0;
1041         enum qeth_card_states recover_flag;
1042
1043         mutex_lock(&card->discipline_mutex);
1044         mutex_lock(&card->conf_mutex);
1045         QETH_DBF_TEXT(SETUP, 2, "setonlin");
1046         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1047
1048         recover_flag = card->state;
1049         rc = qeth_core_hardsetup_card(card);
1050         if (rc) {
1051                 QETH_DBF_TEXT_(SETUP, 2, "2err%04x", rc);
1052                 rc = -ENODEV;
1053                 goto out_remove;
1054         }
1055         qeth_bridgeport_query_support(card);
1056         if (card->options.sbp.supported_funcs)
1057                 dev_info(&card->gdev->dev,
1058                 "The device represents a Bridge Capable Port\n");
1059
1060         if (!card->dev && qeth_l2_setup_netdev(card)) {
1061                 rc = -ENODEV;
1062                 goto out_remove;
1063         }
1064
1065         if (card->info.type != QETH_CARD_TYPE_OSN &&
1066             !qeth_l2_send_setmac(card, card->dev->dev_addr))
1067                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
1068
1069         if (qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP)) {
1070                 if (card->info.hwtrap &&
1071                     qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM))
1072                         card->info.hwtrap = 0;
1073         } else
1074                 card->info.hwtrap = 0;
1075
1076         /* for the rx_bcast characteristic, init VNICC after setmac */
1077         qeth_l2_vnicc_init(card);
1078
1079         qeth_trace_features(card);
1080         qeth_l2_trace_features(card);
1081
1082         qeth_l2_setup_bridgeport_attrs(card);
1083
1084         card->state = CARD_STATE_HARDSETUP;
1085         qeth_print_status_message(card);
1086
1087         /* softsetup */
1088         QETH_DBF_TEXT(SETUP, 2, "softsetp");
1089
1090         if ((card->info.type == QETH_CARD_TYPE_OSD) ||
1091             (card->info.type == QETH_CARD_TYPE_OSX)) {
1092                 rc = qeth_l2_start_ipassists(card);
1093                 if (rc)
1094                         goto out_remove;
1095         }
1096
1097         if (card->info.type != QETH_CARD_TYPE_OSN)
1098                 qeth_l2_process_vlans(card);
1099
1100         netif_tx_disable(card->dev);
1101
1102         rc = qeth_init_qdio_queues(card);
1103         if (rc) {
1104                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1105                 rc = -ENODEV;
1106                 goto out_remove;
1107         }
1108         card->state = CARD_STATE_SOFTSETUP;
1109         if (card->lan_online)
1110                 netif_carrier_on(card->dev);
1111         else
1112                 netif_carrier_off(card->dev);
1113
1114         qeth_set_allowed_threads(card, 0xffffffff, 0);
1115         if (recover_flag == CARD_STATE_RECOVER) {
1116                 if (recovery_mode &&
1117                     card->info.type != QETH_CARD_TYPE_OSN) {
1118                         __qeth_l2_open(card->dev);
1119                 } else {
1120                         rtnl_lock();
1121                         dev_open(card->dev);
1122                         rtnl_unlock();
1123                 }
1124                 /* this also sets saved unicast addresses */
1125                 qeth_l2_set_rx_mode(card->dev);
1126                 rtnl_lock();
1127                 qeth_recover_features(card->dev);
1128                 rtnl_unlock();
1129         }
1130         /* let user_space know that device is online */
1131         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1132         mutex_unlock(&card->conf_mutex);
1133         mutex_unlock(&card->discipline_mutex);
1134         return 0;
1135
1136 out_remove:
1137         qeth_l2_stop_card(card, 0);
1138         ccw_device_set_offline(CARD_DDEV(card));
1139         ccw_device_set_offline(CARD_WDEV(card));
1140         ccw_device_set_offline(CARD_RDEV(card));
1141         qdio_free(CARD_DDEV(card));
1142         if (recover_flag == CARD_STATE_RECOVER)
1143                 card->state = CARD_STATE_RECOVER;
1144         else
1145                 card->state = CARD_STATE_DOWN;
1146         mutex_unlock(&card->conf_mutex);
1147         mutex_unlock(&card->discipline_mutex);
1148         return rc;
1149 }
1150
1151 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1152 {
1153         return __qeth_l2_set_online(gdev, 0);
1154 }
1155
1156 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1157                                         int recovery_mode)
1158 {
1159         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1160         int rc = 0, rc2 = 0, rc3 = 0;
1161         enum qeth_card_states recover_flag;
1162
1163         mutex_lock(&card->discipline_mutex);
1164         mutex_lock(&card->conf_mutex);
1165         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1166         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1167
1168         if (card->dev && netif_carrier_ok(card->dev))
1169                 netif_carrier_off(card->dev);
1170         recover_flag = card->state;
1171         if ((!recovery_mode && card->info.hwtrap) || card->info.hwtrap == 2) {
1172                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1173                 card->info.hwtrap = 1;
1174         }
1175         qeth_l2_stop_card(card, recovery_mode);
1176         rc  = ccw_device_set_offline(CARD_DDEV(card));
1177         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1178         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1179         if (!rc)
1180                 rc = (rc2) ? rc2 : rc3;
1181         if (rc)
1182                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1183         qdio_free(CARD_DDEV(card));
1184         if (recover_flag == CARD_STATE_UP)
1185                 card->state = CARD_STATE_RECOVER;
1186         /* let user_space know that device is offline */
1187         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1188         mutex_unlock(&card->conf_mutex);
1189         mutex_unlock(&card->discipline_mutex);
1190         return 0;
1191 }
1192
1193 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1194 {
1195         return __qeth_l2_set_offline(cgdev, 0);
1196 }
1197
1198 static int qeth_l2_recover(void *ptr)
1199 {
1200         struct qeth_card *card;
1201         int rc = 0;
1202
1203         card = (struct qeth_card *) ptr;
1204         QETH_CARD_TEXT(card, 2, "recover1");
1205         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1206                 return 0;
1207         QETH_CARD_TEXT(card, 2, "recover2");
1208         dev_warn(&card->gdev->dev,
1209                 "A recovery process has been started for the device\n");
1210         qeth_set_recovery_task(card);
1211         __qeth_l2_set_offline(card->gdev, 1);
1212         rc = __qeth_l2_set_online(card->gdev, 1);
1213         if (!rc)
1214                 dev_info(&card->gdev->dev,
1215                         "Device successfully recovered!\n");
1216         else {
1217                 qeth_close_dev(card);
1218                 dev_warn(&card->gdev->dev, "The qeth device driver "
1219                                 "failed to recover an error on the device\n");
1220         }
1221         qeth_clear_recovery_task(card);
1222         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1223         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1224         return 0;
1225 }
1226
1227 static int __init qeth_l2_init(void)
1228 {
1229         pr_info("register layer 2 discipline\n");
1230         return 0;
1231 }
1232
1233 static void __exit qeth_l2_exit(void)
1234 {
1235         pr_info("unregister layer 2 discipline\n");
1236 }
1237
1238 static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev)
1239 {
1240         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1241
1242         if (card->dev)
1243                 netif_device_detach(card->dev);
1244         qeth_set_allowed_threads(card, 0, 1);
1245         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1246         if (gdev->state == CCWGROUP_OFFLINE)
1247                 return 0;
1248         if (card->state == CARD_STATE_UP) {
1249                 if (card->info.hwtrap)
1250                         qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1251                 __qeth_l2_set_offline(card->gdev, 1);
1252         } else
1253                 __qeth_l2_set_offline(card->gdev, 0);
1254         return 0;
1255 }
1256
1257 static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
1258 {
1259         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1260         int rc = 0;
1261
1262         if (gdev->state == CCWGROUP_OFFLINE)
1263                 goto out;
1264
1265         if (card->state == CARD_STATE_RECOVER) {
1266                 rc = __qeth_l2_set_online(card->gdev, 1);
1267                 if (rc) {
1268                         rtnl_lock();
1269                         dev_close(card->dev);
1270                         rtnl_unlock();
1271                 }
1272         } else
1273                 rc = __qeth_l2_set_online(card->gdev, 0);
1274 out:
1275         qeth_set_allowed_threads(card, 0xffffffff, 0);
1276         if (card->dev)
1277                 netif_device_attach(card->dev);
1278         if (rc)
1279                 dev_warn(&card->gdev->dev, "The qeth device driver "
1280                         "failed to recover an error on the device\n");
1281         return rc;
1282 }
1283
1284 /* Returns zero if the command is successfully "consumed" */
1285 static int qeth_l2_control_event(struct qeth_card *card,
1286                                         struct qeth_ipa_cmd *cmd)
1287 {
1288         switch (cmd->hdr.command) {
1289         case IPA_CMD_SETBRIDGEPORT_OSA:
1290         case IPA_CMD_SETBRIDGEPORT_IQD:
1291                 if (cmd->data.sbp.hdr.command_code ==
1292                                 IPA_SBP_BRIDGE_PORT_STATE_CHANGE) {
1293                         qeth_bridge_state_change(card, cmd);
1294                         return 0;
1295                 } else
1296                         return 1;
1297         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
1298                 qeth_bridge_host_event(card, cmd);
1299                 return 0;
1300         default:
1301                 return 1;
1302         }
1303 }
1304
1305 struct qeth_discipline qeth_l2_discipline = {
1306         .devtype = &qeth_l2_devtype,
1307         .process_rx_buffer = qeth_l2_process_inbound_buffer,
1308         .recover = qeth_l2_recover,
1309         .setup = qeth_l2_probe_device,
1310         .remove = qeth_l2_remove_device,
1311         .set_online = qeth_l2_set_online,
1312         .set_offline = qeth_l2_set_offline,
1313         .freeze = qeth_l2_pm_suspend,
1314         .thaw = qeth_l2_pm_resume,
1315         .restore = qeth_l2_pm_resume,
1316         .do_ioctl = NULL,
1317         .control_event_handler = qeth_l2_control_event,
1318 };
1319 EXPORT_SYMBOL_GPL(qeth_l2_discipline);
1320
1321 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1322                            struct qeth_cmd_buffer *iob)
1323 {
1324         unsigned long flags;
1325         int rc = 0;
1326
1327         QETH_CARD_TEXT(card, 5, "osndctrd");
1328
1329         wait_event(card->wait_q,
1330                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1331         qeth_prepare_control_data(card, len, iob);
1332         QETH_CARD_TEXT(card, 6, "osnoirqp");
1333         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1334         rc = ccw_device_start_timeout(CARD_WDEV(card), &card->write.ccw,
1335                                       (addr_t) iob, 0, 0, QETH_IPA_TIMEOUT);
1336         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1337         if (rc) {
1338                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1339                            "ccw_device_start rc = %i\n", rc);
1340                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1341                 qeth_release_buffer(iob->channel, iob);
1342                 atomic_set(&card->write.irq_pending, 0);
1343                 wake_up(&card->wait_q);
1344         }
1345         return rc;
1346 }
1347
1348 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1349                         struct qeth_cmd_buffer *iob, int data_len)
1350 {
1351         u16 s1, s2;
1352
1353         QETH_CARD_TEXT(card, 4, "osndipa");
1354
1355         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1356         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1357         s2 = (u16)data_len;
1358         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1359         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1360         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1361         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1362         return qeth_osn_send_control_data(card, s1, iob);
1363 }
1364
1365 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1366 {
1367         struct qeth_cmd_buffer *iob;
1368         struct qeth_card *card;
1369
1370         if (!dev)
1371                 return -ENODEV;
1372         card = dev->ml_priv;
1373         if (!card)
1374                 return -ENODEV;
1375         QETH_CARD_TEXT(card, 2, "osnsdmc");
1376         if (!qeth_card_hw_is_reachable(card))
1377                 return -ENODEV;
1378         iob = qeth_wait_for_buffer(&card->write);
1379         memcpy(__ipa_cmd(iob), data, data_len);
1380         return qeth_osn_send_ipa_cmd(card, iob, data_len);
1381 }
1382 EXPORT_SYMBOL(qeth_osn_assist);
1383
1384 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1385                   int (*assist_cb)(struct net_device *, void *),
1386                   int (*data_cb)(struct sk_buff *))
1387 {
1388         struct qeth_card *card;
1389
1390         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1391         if (*dev == NULL)
1392                 return -ENODEV;
1393         card = (*dev)->ml_priv;
1394         if (!card)
1395                 return -ENODEV;
1396         QETH_CARD_TEXT(card, 2, "osnreg");
1397         if ((assist_cb == NULL) || (data_cb == NULL))
1398                 return -EINVAL;
1399         card->osn_info.assist_cb = assist_cb;
1400         card->osn_info.data_cb = data_cb;
1401         return 0;
1402 }
1403 EXPORT_SYMBOL(qeth_osn_register);
1404
1405 void qeth_osn_deregister(struct net_device *dev)
1406 {
1407         struct qeth_card *card;
1408
1409         if (!dev)
1410                 return;
1411         card = dev->ml_priv;
1412         if (!card)
1413                 return;
1414         QETH_CARD_TEXT(card, 2, "osndereg");
1415         card->osn_info.assist_cb = NULL;
1416         card->osn_info.data_cb = NULL;
1417         return;
1418 }
1419 EXPORT_SYMBOL(qeth_osn_deregister);
1420
1421 /* SETBRIDGEPORT support, async notifications */
1422
1423 enum qeth_an_event_type {anev_reg_unreg, anev_abort, anev_reset};
1424
1425 /**
1426  * qeth_bridge_emit_host_event() - bridgeport address change notification
1427  * @card:  qeth_card structure pointer, for udev events.
1428  * @evtype:  "normal" register/unregister, or abort, or reset. For abort
1429  *            and reset token and addr_lnid are unused and may be NULL.
1430  * @code:  event bitmask: high order bit 0x80 value 1 means removal of an
1431  *                        object, 0 - addition of an object.
1432  *                        0x01 - VLAN, 0x02 - MAC, 0x03 - VLAN and MAC.
1433  * @token: "network token" structure identifying physical address of the port.
1434  * @addr_lnid: pointer to structure with MAC address and VLAN ID.
1435  *
1436  * This function is called when registrations and deregistrations are
1437  * reported by the hardware, and also when notifications are enabled -
1438  * for all currently registered addresses.
1439  */
1440 static void qeth_bridge_emit_host_event(struct qeth_card *card,
1441         enum qeth_an_event_type evtype,
1442         u8 code, struct net_if_token *token, struct mac_addr_lnid *addr_lnid)
1443 {
1444         char str[7][32];
1445         char *env[8];
1446         int i = 0;
1447
1448         switch (evtype) {
1449         case anev_reg_unreg:
1450                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=%s",
1451                                 (code & IPA_ADDR_CHANGE_CODE_REMOVAL)
1452                                 ? "deregister" : "register");
1453                 env[i] = str[i]; i++;
1454                 if (code & IPA_ADDR_CHANGE_CODE_VLANID) {
1455                         snprintf(str[i], sizeof(str[i]), "VLAN=%d",
1456                                 addr_lnid->lnid);
1457                         env[i] = str[i]; i++;
1458                 }
1459                 if (code & IPA_ADDR_CHANGE_CODE_MACADDR) {
1460                         snprintf(str[i], sizeof(str[i]), "MAC=%pM",
1461                                 addr_lnid->mac);
1462                         env[i] = str[i]; i++;
1463                 }
1464                 snprintf(str[i], sizeof(str[i]), "NTOK_BUSID=%x.%x.%04x",
1465                         token->cssid, token->ssid, token->devnum);
1466                 env[i] = str[i]; i++;
1467                 snprintf(str[i], sizeof(str[i]), "NTOK_IID=%02x", token->iid);
1468                 env[i] = str[i]; i++;
1469                 snprintf(str[i], sizeof(str[i]), "NTOK_CHPID=%02x",
1470                                 token->chpid);
1471                 env[i] = str[i]; i++;
1472                 snprintf(str[i], sizeof(str[i]), "NTOK_CHID=%04x", token->chid);
1473                 env[i] = str[i]; i++;
1474                 break;
1475         case anev_abort:
1476                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=abort");
1477                 env[i] = str[i]; i++;
1478                 break;
1479         case anev_reset:
1480                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=reset");
1481                 env[i] = str[i]; i++;
1482                 break;
1483         }
1484         env[i] = NULL;
1485         kobject_uevent_env(&card->gdev->dev.kobj, KOBJ_CHANGE, env);
1486 }
1487
1488 struct qeth_bridge_state_data {
1489         struct work_struct worker;
1490         struct qeth_card *card;
1491         struct qeth_sbp_state_change qports;
1492 };
1493
1494 static void qeth_bridge_state_change_worker(struct work_struct *work)
1495 {
1496         struct qeth_bridge_state_data *data =
1497                 container_of(work, struct qeth_bridge_state_data, worker);
1498         /* We are only interested in the first entry - local port */
1499         struct qeth_sbp_port_entry *entry = &data->qports.entry[0];
1500         char env_locrem[32];
1501         char env_role[32];
1502         char env_state[32];
1503         char *env[] = {
1504                 env_locrem,
1505                 env_role,
1506                 env_state,
1507                 NULL
1508         };
1509
1510         /* Role should not change by itself, but if it did, */
1511         /* information from the hardware is authoritative.  */
1512         mutex_lock(&data->card->conf_mutex);
1513         data->card->options.sbp.role = entry->role;
1514         mutex_unlock(&data->card->conf_mutex);
1515
1516         snprintf(env_locrem, sizeof(env_locrem), "BRIDGEPORT=statechange");
1517         snprintf(env_role, sizeof(env_role), "ROLE=%s",
1518                 (entry->role == QETH_SBP_ROLE_NONE) ? "none" :
1519                 (entry->role == QETH_SBP_ROLE_PRIMARY) ? "primary" :
1520                 (entry->role == QETH_SBP_ROLE_SECONDARY) ? "secondary" :
1521                 "<INVALID>");
1522         snprintf(env_state, sizeof(env_state), "STATE=%s",
1523                 (entry->state == QETH_SBP_STATE_INACTIVE) ? "inactive" :
1524                 (entry->state == QETH_SBP_STATE_STANDBY) ? "standby" :
1525                 (entry->state == QETH_SBP_STATE_ACTIVE) ? "active" :
1526                 "<INVALID>");
1527         kobject_uevent_env(&data->card->gdev->dev.kobj,
1528                                 KOBJ_CHANGE, env);
1529         kfree(data);
1530 }
1531
1532 static void qeth_bridge_state_change(struct qeth_card *card,
1533                                         struct qeth_ipa_cmd *cmd)
1534 {
1535         struct qeth_sbp_state_change *qports =
1536                  &cmd->data.sbp.data.state_change;
1537         struct qeth_bridge_state_data *data;
1538         int extrasize;
1539
1540         QETH_CARD_TEXT(card, 2, "brstchng");
1541         if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1542                 QETH_CARD_TEXT_(card, 2, "BPsz%04x", qports->entry_length);
1543                 return;
1544         }
1545         extrasize = sizeof(struct qeth_sbp_port_entry) * qports->num_entries;
1546         data = kzalloc(sizeof(struct qeth_bridge_state_data) + extrasize,
1547                 GFP_ATOMIC);
1548         if (!data) {
1549                 QETH_CARD_TEXT(card, 2, "BPSalloc");
1550                 return;
1551         }
1552         INIT_WORK(&data->worker, qeth_bridge_state_change_worker);
1553         data->card = card;
1554         memcpy(&data->qports, qports,
1555                         sizeof(struct qeth_sbp_state_change) + extrasize);
1556         queue_work(qeth_wq, &data->worker);
1557 }
1558
1559 struct qeth_bridge_host_data {
1560         struct work_struct worker;
1561         struct qeth_card *card;
1562         struct qeth_ipacmd_addr_change hostevs;
1563 };
1564
1565 static void qeth_bridge_host_event_worker(struct work_struct *work)
1566 {
1567         struct qeth_bridge_host_data *data =
1568                 container_of(work, struct qeth_bridge_host_data, worker);
1569         int i;
1570
1571         if (data->hostevs.lost_event_mask) {
1572                 dev_info(&data->card->gdev->dev,
1573 "Address notification from the Bridge Port stopped %s (%s)\n",
1574                         data->card->dev->name,
1575                         (data->hostevs.lost_event_mask == 0x01)
1576                         ? "Overflow"
1577                         : (data->hostevs.lost_event_mask == 0x02)
1578                         ? "Bridge port state change"
1579                         : "Unknown reason");
1580                 mutex_lock(&data->card->conf_mutex);
1581                 data->card->options.sbp.hostnotification = 0;
1582                 mutex_unlock(&data->card->conf_mutex);
1583                 qeth_bridge_emit_host_event(data->card, anev_abort,
1584                         0, NULL, NULL);
1585         } else
1586                 for (i = 0; i < data->hostevs.num_entries; i++) {
1587                         struct qeth_ipacmd_addr_change_entry *entry =
1588                                         &data->hostevs.entry[i];
1589                         qeth_bridge_emit_host_event(data->card,
1590                                         anev_reg_unreg,
1591                                         entry->change_code,
1592                                         &entry->token, &entry->addr_lnid);
1593                 }
1594         kfree(data);
1595 }
1596
1597 static void qeth_bridge_host_event(struct qeth_card *card,
1598                                         struct qeth_ipa_cmd *cmd)
1599 {
1600         struct qeth_ipacmd_addr_change *hostevs =
1601                  &cmd->data.addrchange;
1602         struct qeth_bridge_host_data *data;
1603         int extrasize;
1604
1605         QETH_CARD_TEXT(card, 2, "brhostev");
1606         if (cmd->hdr.return_code != 0x0000) {
1607                 if (cmd->hdr.return_code == 0x0010) {
1608                         if (hostevs->lost_event_mask == 0x00)
1609                                 hostevs->lost_event_mask = 0xff;
1610                 } else {
1611                         QETH_CARD_TEXT_(card, 2, "BPHe%04x",
1612                                 cmd->hdr.return_code);
1613                         return;
1614                 }
1615         }
1616         extrasize = sizeof(struct qeth_ipacmd_addr_change_entry) *
1617                                                 hostevs->num_entries;
1618         data = kzalloc(sizeof(struct qeth_bridge_host_data) + extrasize,
1619                 GFP_ATOMIC);
1620         if (!data) {
1621                 QETH_CARD_TEXT(card, 2, "BPHalloc");
1622                 return;
1623         }
1624         INIT_WORK(&data->worker, qeth_bridge_host_event_worker);
1625         data->card = card;
1626         memcpy(&data->hostevs, hostevs,
1627                         sizeof(struct qeth_ipacmd_addr_change) + extrasize);
1628         queue_work(qeth_wq, &data->worker);
1629 }
1630
1631 /* SETBRIDGEPORT support; sending commands */
1632
1633 struct _qeth_sbp_cbctl {
1634         u16 ipa_rc;
1635         u16 cmd_rc;
1636         union {
1637                 u32 supported;
1638                 struct {
1639                         enum qeth_sbp_roles *role;
1640                         enum qeth_sbp_states *state;
1641                 } qports;
1642         } data;
1643 };
1644
1645 /**
1646  * qeth_bridgeport_makerc() - derive "traditional" error from hardware codes.
1647  * @card:                     qeth_card structure pointer, for debug messages.
1648  * @cbctl:                    state structure with hardware return codes.
1649  * @setcmd:                   IPA command code
1650  *
1651  * Returns negative errno-compatible error indication or 0 on success.
1652  */
1653 static int qeth_bridgeport_makerc(struct qeth_card *card,
1654         struct _qeth_sbp_cbctl *cbctl, enum qeth_ipa_sbp_cmd setcmd)
1655 {
1656         int rc;
1657         int is_iqd = (card->info.type == QETH_CARD_TYPE_IQD);
1658
1659         if ((is_iqd && (cbctl->ipa_rc == IPA_RC_SUCCESS)) ||
1660             (!is_iqd && (cbctl->ipa_rc == cbctl->cmd_rc)))
1661                 switch (cbctl->cmd_rc) {
1662                 case IPA_RC_SUCCESS:
1663                         rc = 0;
1664                         break;
1665                 case IPA_RC_L2_UNSUPPORTED_CMD:
1666                 case IPA_RC_UNSUPPORTED_COMMAND:
1667                         rc = -EOPNOTSUPP;
1668                         break;
1669                 case IPA_RC_SBP_OSA_NOT_CONFIGURED:
1670                 case IPA_RC_SBP_IQD_NOT_CONFIGURED:
1671                         rc = -ENODEV; /* maybe not the best code here? */
1672                         dev_err(&card->gdev->dev,
1673         "The device is not configured as a Bridge Port\n");
1674                         break;
1675                 case IPA_RC_SBP_OSA_OS_MISMATCH:
1676                 case IPA_RC_SBP_IQD_OS_MISMATCH:
1677                         rc = -EPERM;
1678                         dev_err(&card->gdev->dev,
1679         "A Bridge Port is already configured by a different operating system\n");
1680                         break;
1681                 case IPA_RC_SBP_OSA_ANO_DEV_PRIMARY:
1682                 case IPA_RC_SBP_IQD_ANO_DEV_PRIMARY:
1683                         switch (setcmd) {
1684                         case IPA_SBP_SET_PRIMARY_BRIDGE_PORT:
1685                                 rc = -EEXIST;
1686                                 dev_err(&card->gdev->dev,
1687         "The LAN already has a primary Bridge Port\n");
1688                                 break;
1689                         case IPA_SBP_SET_SECONDARY_BRIDGE_PORT:
1690                                 rc = -EBUSY;
1691                                 dev_err(&card->gdev->dev,
1692         "The device is already a primary Bridge Port\n");
1693                                 break;
1694                         default:
1695                                 rc = -EIO;
1696                         }
1697                         break;
1698                 case IPA_RC_SBP_OSA_CURRENT_SECOND:
1699                 case IPA_RC_SBP_IQD_CURRENT_SECOND:
1700                         rc = -EBUSY;
1701                         dev_err(&card->gdev->dev,
1702         "The device is already a secondary Bridge Port\n");
1703                         break;
1704                 case IPA_RC_SBP_OSA_LIMIT_SECOND:
1705                 case IPA_RC_SBP_IQD_LIMIT_SECOND:
1706                         rc = -EEXIST;
1707                         dev_err(&card->gdev->dev,
1708         "The LAN cannot have more secondary Bridge Ports\n");
1709                         break;
1710                 case IPA_RC_SBP_OSA_CURRENT_PRIMARY:
1711                 case IPA_RC_SBP_IQD_CURRENT_PRIMARY:
1712                         rc = -EBUSY;
1713                         dev_err(&card->gdev->dev,
1714         "The device is already a primary Bridge Port\n");
1715                         break;
1716                 case IPA_RC_SBP_OSA_NOT_AUTHD_BY_ZMAN:
1717                 case IPA_RC_SBP_IQD_NOT_AUTHD_BY_ZMAN:
1718                         rc = -EACCES;
1719                         dev_err(&card->gdev->dev,
1720         "The device is not authorized to be a Bridge Port\n");
1721                         break;
1722                 default:
1723                         rc = -EIO;
1724                 }
1725         else
1726                 switch (cbctl->ipa_rc) {
1727                 case IPA_RC_NOTSUPP:
1728                         rc = -EOPNOTSUPP;
1729                         break;
1730                 case IPA_RC_UNSUPPORTED_COMMAND:
1731                         rc = -EOPNOTSUPP;
1732                         break;
1733                 default:
1734                         rc = -EIO;
1735                 }
1736
1737         if (rc) {
1738                 QETH_CARD_TEXT_(card, 2, "SBPi%04x", cbctl->ipa_rc);
1739                 QETH_CARD_TEXT_(card, 2, "SBPc%04x", cbctl->cmd_rc);
1740         }
1741         return rc;
1742 }
1743
1744 static struct qeth_cmd_buffer *qeth_sbp_build_cmd(struct qeth_card *card,
1745                                                   enum qeth_ipa_sbp_cmd sbp_cmd,
1746                                                   unsigned int cmd_length)
1747 {
1748         enum qeth_ipa_cmds ipa_cmd = (card->info.type == QETH_CARD_TYPE_IQD) ?
1749                                         IPA_CMD_SETBRIDGEPORT_IQD :
1750                                         IPA_CMD_SETBRIDGEPORT_OSA;
1751         struct qeth_cmd_buffer *iob;
1752         struct qeth_ipa_cmd *cmd;
1753
1754         iob = qeth_get_ipacmd_buffer(card, ipa_cmd, 0);
1755         if (!iob)
1756                 return iob;
1757         cmd = __ipa_cmd(iob);
1758         cmd->data.sbp.hdr.cmdlength = sizeof(struct qeth_ipacmd_sbp_hdr) +
1759                                       cmd_length;
1760         cmd->data.sbp.hdr.command_code = sbp_cmd;
1761         cmd->data.sbp.hdr.used_total = 1;
1762         cmd->data.sbp.hdr.seq_no = 1;
1763         return iob;
1764 }
1765
1766 static int qeth_bridgeport_query_support_cb(struct qeth_card *card,
1767         struct qeth_reply *reply, unsigned long data)
1768 {
1769         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1770         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1771         QETH_CARD_TEXT(card, 2, "brqsupcb");
1772         cbctl->ipa_rc = cmd->hdr.return_code;
1773         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1774         if ((cbctl->ipa_rc == 0) && (cbctl->cmd_rc == 0)) {
1775                 cbctl->data.supported =
1776                         cmd->data.sbp.data.query_cmds_supp.supported_cmds;
1777         } else {
1778                 cbctl->data.supported = 0;
1779         }
1780         return 0;
1781 }
1782
1783 /**
1784  * qeth_bridgeport_query_support() - store bitmask of supported subfunctions.
1785  * @card:                            qeth_card structure pointer.
1786  *
1787  * Sets bitmask of supported setbridgeport subfunctions in the qeth_card
1788  * strucutre: card->options.sbp.supported_funcs.
1789  */
1790 static void qeth_bridgeport_query_support(struct qeth_card *card)
1791 {
1792         struct qeth_cmd_buffer *iob;
1793         struct _qeth_sbp_cbctl cbctl;
1794
1795         QETH_CARD_TEXT(card, 2, "brqsuppo");
1796         iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_COMMANDS_SUPPORTED,
1797                                  sizeof(struct qeth_sbp_query_cmds_supp));
1798         if (!iob)
1799                 return;
1800         if (qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_support_cb,
1801                                                         (void *)&cbctl) ||
1802             qeth_bridgeport_makerc(card, &cbctl,
1803                                         IPA_SBP_QUERY_COMMANDS_SUPPORTED)) {
1804                 /* non-zero makerc signifies failure, and produce messages */
1805                 card->options.sbp.role = QETH_SBP_ROLE_NONE;
1806                 return;
1807         }
1808         card->options.sbp.supported_funcs = cbctl.data.supported;
1809 }
1810
1811 static int qeth_bridgeport_query_ports_cb(struct qeth_card *card,
1812         struct qeth_reply *reply, unsigned long data)
1813 {
1814         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1815         struct qeth_sbp_query_ports *qports = &cmd->data.sbp.data.query_ports;
1816         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1817
1818         QETH_CARD_TEXT(card, 2, "brqprtcb");
1819         cbctl->ipa_rc = cmd->hdr.return_code;
1820         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1821         if ((cbctl->ipa_rc != 0) || (cbctl->cmd_rc != 0))
1822                 return 0;
1823         if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1824                 cbctl->cmd_rc = 0xffff;
1825                 QETH_CARD_TEXT_(card, 2, "SBPs%04x", qports->entry_length);
1826                 return 0;
1827         }
1828         /* first entry contains the state of the local port */
1829         if (qports->num_entries > 0) {
1830                 if (cbctl->data.qports.role)
1831                         *cbctl->data.qports.role = qports->entry[0].role;
1832                 if (cbctl->data.qports.state)
1833                         *cbctl->data.qports.state = qports->entry[0].state;
1834         }
1835         return 0;
1836 }
1837
1838 /**
1839  * qeth_bridgeport_query_ports() - query local bridgeport status.
1840  * @card:                          qeth_card structure pointer.
1841  * @role:   Role of the port: 0-none, 1-primary, 2-secondary.
1842  * @state:  State of the port: 0-inactive, 1-standby, 2-active.
1843  *
1844  * Returns negative errno-compatible error indication or 0 on success.
1845  *
1846  * 'role' and 'state' are not updated in case of hardware operation failure.
1847  */
1848 int qeth_bridgeport_query_ports(struct qeth_card *card,
1849         enum qeth_sbp_roles *role, enum qeth_sbp_states *state)
1850 {
1851         int rc = 0;
1852         struct qeth_cmd_buffer *iob;
1853         struct _qeth_sbp_cbctl cbctl = {
1854                 .data = {
1855                         .qports = {
1856                                 .role = role,
1857                                 .state = state,
1858                         },
1859                 },
1860         };
1861
1862         QETH_CARD_TEXT(card, 2, "brqports");
1863         if (!(card->options.sbp.supported_funcs & IPA_SBP_QUERY_BRIDGE_PORTS))
1864                 return -EOPNOTSUPP;
1865         iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_BRIDGE_PORTS, 0);
1866         if (!iob)
1867                 return -ENOMEM;
1868         rc = qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_ports_cb,
1869                                 (void *)&cbctl);
1870         if (rc < 0)
1871                 return rc;
1872         return qeth_bridgeport_makerc(card, &cbctl, IPA_SBP_QUERY_BRIDGE_PORTS);
1873 }
1874 EXPORT_SYMBOL_GPL(qeth_bridgeport_query_ports);
1875
1876 static int qeth_bridgeport_set_cb(struct qeth_card *card,
1877         struct qeth_reply *reply, unsigned long data)
1878 {
1879         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
1880         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1881         QETH_CARD_TEXT(card, 2, "brsetrcb");
1882         cbctl->ipa_rc = cmd->hdr.return_code;
1883         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1884         return 0;
1885 }
1886
1887 /**
1888  * qeth_bridgeport_setrole() - Assign primary role to the port.
1889  * @card:                      qeth_card structure pointer.
1890  * @role:                      Role to assign.
1891  *
1892  * Returns negative errno-compatible error indication or 0 on success.
1893  */
1894 int qeth_bridgeport_setrole(struct qeth_card *card, enum qeth_sbp_roles role)
1895 {
1896         int rc = 0;
1897         int cmdlength;
1898         struct qeth_cmd_buffer *iob;
1899         struct _qeth_sbp_cbctl cbctl;
1900         enum qeth_ipa_sbp_cmd setcmd;
1901
1902         QETH_CARD_TEXT(card, 2, "brsetrol");
1903         switch (role) {
1904         case QETH_SBP_ROLE_NONE:
1905                 setcmd = IPA_SBP_RESET_BRIDGE_PORT_ROLE;
1906                 cmdlength = sizeof(struct qeth_sbp_reset_role);
1907                 break;
1908         case QETH_SBP_ROLE_PRIMARY:
1909                 setcmd = IPA_SBP_SET_PRIMARY_BRIDGE_PORT;
1910                 cmdlength = sizeof(struct qeth_sbp_set_primary);
1911                 break;
1912         case QETH_SBP_ROLE_SECONDARY:
1913                 setcmd = IPA_SBP_SET_SECONDARY_BRIDGE_PORT;
1914                 cmdlength = sizeof(struct qeth_sbp_set_secondary);
1915                 break;
1916         default:
1917                 return -EINVAL;
1918         }
1919         if (!(card->options.sbp.supported_funcs & setcmd))
1920                 return -EOPNOTSUPP;
1921         iob = qeth_sbp_build_cmd(card, setcmd, cmdlength);
1922         if (!iob)
1923                 return -ENOMEM;
1924         rc = qeth_send_ipa_cmd(card, iob, qeth_bridgeport_set_cb,
1925                                 (void *)&cbctl);
1926         if (rc < 0)
1927                 return rc;
1928         return qeth_bridgeport_makerc(card, &cbctl, setcmd);
1929 }
1930
1931 /**
1932  * qeth_anset_makerc() - derive "traditional" error from hardware codes.
1933  * @card:                     qeth_card structure pointer, for debug messages.
1934  *
1935  * Returns negative errno-compatible error indication or 0 on success.
1936  */
1937 static int qeth_anset_makerc(struct qeth_card *card, int pnso_rc, u16 response)
1938 {
1939         int rc;
1940
1941         if (pnso_rc == 0)
1942                 switch (response) {
1943                 case 0x0001:
1944                         rc = 0;
1945                         break;
1946                 case 0x0004:
1947                 case 0x0100:
1948                 case 0x0106:
1949                         rc = -EOPNOTSUPP;
1950                         dev_err(&card->gdev->dev,
1951                                 "Setting address notification failed\n");
1952                         break;
1953                 case 0x0107:
1954                         rc = -EAGAIN;
1955                         break;
1956                 default:
1957                         rc = -EIO;
1958                 }
1959         else
1960                 rc = -EIO;
1961
1962         if (rc) {
1963                 QETH_CARD_TEXT_(card, 2, "SBPp%04x", pnso_rc);
1964                 QETH_CARD_TEXT_(card, 2, "SBPr%04x", response);
1965         }
1966         return rc;
1967 }
1968
1969 static void qeth_bridgeport_an_set_cb(void *priv,
1970                 enum qdio_brinfo_entry_type type, void *entry)
1971 {
1972         struct qeth_card *card = (struct qeth_card *)priv;
1973         struct qdio_brinfo_entry_l2 *l2entry;
1974         u8 code;
1975
1976         if (type != l2_addr_lnid) {
1977                 WARN_ON_ONCE(1);
1978                 return;
1979         }
1980
1981         l2entry = (struct qdio_brinfo_entry_l2 *)entry;
1982         code = IPA_ADDR_CHANGE_CODE_MACADDR;
1983         if (l2entry->addr_lnid.lnid)
1984                 code |= IPA_ADDR_CHANGE_CODE_VLANID;
1985         qeth_bridge_emit_host_event(card, anev_reg_unreg, code,
1986                 (struct net_if_token *)&l2entry->nit,
1987                 (struct mac_addr_lnid *)&l2entry->addr_lnid);
1988 }
1989
1990 /**
1991  * qeth_bridgeport_an_set() - Enable or disable bridgeport address notification
1992  * @card:                     qeth_card structure pointer.
1993  * @enable:                   0 - disable, non-zero - enable notifications
1994  *
1995  * Returns negative errno-compatible error indication or 0 on success.
1996  *
1997  * On enable, emits a series of address notifications udev events for all
1998  * currently registered hosts.
1999  */
2000 int qeth_bridgeport_an_set(struct qeth_card *card, int enable)
2001 {
2002         int rc;
2003         u16 response;
2004         struct ccw_device *ddev;
2005         struct subchannel_id schid;
2006
2007         if (!card)
2008                 return -EINVAL;
2009         if (!card->options.sbp.supported_funcs)
2010                 return -EOPNOTSUPP;
2011         ddev = CARD_DDEV(card);
2012         ccw_device_get_schid(ddev, &schid);
2013
2014         if (enable) {
2015                 qeth_bridge_emit_host_event(card, anev_reset, 0, NULL, NULL);
2016                 rc = qdio_pnso_brinfo(schid, 1, &response,
2017                         qeth_bridgeport_an_set_cb, card);
2018         } else
2019                 rc = qdio_pnso_brinfo(schid, 0, &response, NULL, NULL);
2020         return qeth_anset_makerc(card, rc, response);
2021 }
2022 EXPORT_SYMBOL_GPL(qeth_bridgeport_an_set);
2023
2024 static bool qeth_bridgeport_is_in_use(struct qeth_card *card)
2025 {
2026         return (card->options.sbp.role || card->options.sbp.reflect_promisc ||
2027                 card->options.sbp.hostnotification);
2028 }
2029
2030 /* VNIC Characteristics support */
2031
2032 /* handle VNICC IPA command return codes; convert to error codes */
2033 static int qeth_l2_vnicc_makerc(struct qeth_card *card, int ipa_rc)
2034 {
2035         int rc;
2036
2037         switch (ipa_rc) {
2038         case IPA_RC_SUCCESS:
2039                 return ipa_rc;
2040         case IPA_RC_L2_UNSUPPORTED_CMD:
2041         case IPA_RC_NOTSUPP:
2042                 rc = -EOPNOTSUPP;
2043                 break;
2044         case IPA_RC_VNICC_OOSEQ:
2045                 rc = -EALREADY;
2046                 break;
2047         case IPA_RC_VNICC_VNICBP:
2048                 rc = -EBUSY;
2049                 break;
2050         case IPA_RC_L2_ADDR_TABLE_FULL:
2051                 rc = -ENOSPC;
2052                 break;
2053         case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
2054                 rc = -EACCES;
2055                 break;
2056         default:
2057                 rc = -EIO;
2058         }
2059
2060         QETH_CARD_TEXT_(card, 2, "err%04x", ipa_rc);
2061         return rc;
2062 }
2063
2064 /* generic VNICC request call back control */
2065 struct _qeth_l2_vnicc_request_cbctl {
2066         u32 sub_cmd;
2067         struct {
2068                 u32 vnic_char;
2069                 u32 timeout;
2070         } param;
2071         struct {
2072                 union{
2073                         u32 *sup_cmds;
2074                         u32 *timeout;
2075                 };
2076         } result;
2077 };
2078
2079 /* generic VNICC request call back */
2080 static int qeth_l2_vnicc_request_cb(struct qeth_card *card,
2081                                     struct qeth_reply *reply,
2082                                     unsigned long data)
2083 {
2084         struct _qeth_l2_vnicc_request_cbctl *cbctl =
2085                 (struct _qeth_l2_vnicc_request_cbctl *) reply->param;
2086         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2087         struct qeth_ipacmd_vnicc *rep = &cmd->data.vnicc;
2088
2089         QETH_CARD_TEXT(card, 2, "vniccrcb");
2090         if (cmd->hdr.return_code)
2091                 return 0;
2092         /* return results to caller */
2093         card->options.vnicc.sup_chars = rep->hdr.sup;
2094         card->options.vnicc.cur_chars = rep->hdr.cur;
2095
2096         if (cbctl->sub_cmd == IPA_VNICC_QUERY_CMDS)
2097                 *cbctl->result.sup_cmds = rep->query_cmds.sup_cmds;
2098
2099         if (cbctl->sub_cmd == IPA_VNICC_GET_TIMEOUT)
2100                 *cbctl->result.timeout = rep->getset_timeout.timeout;
2101
2102         return 0;
2103 }
2104
2105 /* generic VNICC request */
2106 static int qeth_l2_vnicc_request(struct qeth_card *card,
2107                                  struct _qeth_l2_vnicc_request_cbctl *cbctl)
2108 {
2109         struct qeth_ipacmd_vnicc *req;
2110         struct qeth_cmd_buffer *iob;
2111         struct qeth_ipa_cmd *cmd;
2112         int rc;
2113
2114         QETH_CARD_TEXT(card, 2, "vniccreq");
2115
2116         /* get new buffer for request */
2117         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_VNICC, 0);
2118         if (!iob)
2119                 return -ENOMEM;
2120
2121         /* create header for request */
2122         cmd = __ipa_cmd(iob);
2123         req = &cmd->data.vnicc;
2124
2125         /* create sub command header for request */
2126         req->sub_hdr.data_length = sizeof(req->sub_hdr);
2127         req->sub_hdr.sub_command = cbctl->sub_cmd;
2128
2129         /* create sub command specific request fields */
2130         switch (cbctl->sub_cmd) {
2131         case IPA_VNICC_QUERY_CHARS:
2132                 break;
2133         case IPA_VNICC_QUERY_CMDS:
2134                 req->sub_hdr.data_length += sizeof(req->query_cmds);
2135                 req->query_cmds.vnic_char = cbctl->param.vnic_char;
2136                 break;
2137         case IPA_VNICC_ENABLE:
2138         case IPA_VNICC_DISABLE:
2139                 req->sub_hdr.data_length += sizeof(req->set_char);
2140                 req->set_char.vnic_char = cbctl->param.vnic_char;
2141                 break;
2142         case IPA_VNICC_SET_TIMEOUT:
2143                 req->getset_timeout.timeout = cbctl->param.timeout;
2144                 /* fallthrough */
2145         case IPA_VNICC_GET_TIMEOUT:
2146                 req->sub_hdr.data_length += sizeof(req->getset_timeout);
2147                 req->getset_timeout.vnic_char = cbctl->param.vnic_char;
2148                 break;
2149         default:
2150                 qeth_release_buffer(iob->channel, iob);
2151                 return -EOPNOTSUPP;
2152         }
2153
2154         /* send request */
2155         rc = qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb,
2156                                (void *) cbctl);
2157
2158         return qeth_l2_vnicc_makerc(card, rc);
2159 }
2160
2161 /* VNICC query VNIC characteristics request */
2162 static int qeth_l2_vnicc_query_chars(struct qeth_card *card)
2163 {
2164         struct _qeth_l2_vnicc_request_cbctl cbctl;
2165
2166         /* prepare callback control */
2167         cbctl.sub_cmd = IPA_VNICC_QUERY_CHARS;
2168
2169         QETH_CARD_TEXT(card, 2, "vniccqch");
2170         return qeth_l2_vnicc_request(card, &cbctl);
2171 }
2172
2173 /* VNICC query sub commands request */
2174 static int qeth_l2_vnicc_query_cmds(struct qeth_card *card, u32 vnic_char,
2175                                     u32 *sup_cmds)
2176 {
2177         struct _qeth_l2_vnicc_request_cbctl cbctl;
2178
2179         /* prepare callback control */
2180         cbctl.sub_cmd = IPA_VNICC_QUERY_CMDS;
2181         cbctl.param.vnic_char = vnic_char;
2182         cbctl.result.sup_cmds = sup_cmds;
2183
2184         QETH_CARD_TEXT(card, 2, "vniccqcm");
2185         return qeth_l2_vnicc_request(card, &cbctl);
2186 }
2187
2188 /* VNICC enable/disable characteristic request */
2189 static int qeth_l2_vnicc_set_char(struct qeth_card *card, u32 vnic_char,
2190                                       u32 cmd)
2191 {
2192         struct _qeth_l2_vnicc_request_cbctl cbctl;
2193
2194         /* prepare callback control */
2195         cbctl.sub_cmd = cmd;
2196         cbctl.param.vnic_char = vnic_char;
2197
2198         QETH_CARD_TEXT(card, 2, "vniccedc");
2199         return qeth_l2_vnicc_request(card, &cbctl);
2200 }
2201
2202 /* VNICC get/set timeout for characteristic request */
2203 static int qeth_l2_vnicc_getset_timeout(struct qeth_card *card, u32 vnicc,
2204                                         u32 cmd, u32 *timeout)
2205 {
2206         struct _qeth_l2_vnicc_request_cbctl cbctl;
2207
2208         /* prepare callback control */
2209         cbctl.sub_cmd = cmd;
2210         cbctl.param.vnic_char = vnicc;
2211         if (cmd == IPA_VNICC_SET_TIMEOUT)
2212                 cbctl.param.timeout = *timeout;
2213         if (cmd == IPA_VNICC_GET_TIMEOUT)
2214                 cbctl.result.timeout = timeout;
2215
2216         QETH_CARD_TEXT(card, 2, "vniccgst");
2217         return qeth_l2_vnicc_request(card, &cbctl);
2218 }
2219
2220 /* set current VNICC flag state; called from sysfs store function */
2221 int qeth_l2_vnicc_set_state(struct qeth_card *card, u32 vnicc, bool state)
2222 {
2223         int rc = 0;
2224         u32 cmd;
2225
2226         QETH_CARD_TEXT(card, 2, "vniccsch");
2227
2228         /* do not change anything if BridgePort is enabled */
2229         if (qeth_bridgeport_is_in_use(card))
2230                 return -EBUSY;
2231
2232         /* check if characteristic and enable/disable are supported */
2233         if (!(card->options.vnicc.sup_chars & vnicc) ||
2234             !(card->options.vnicc.set_char_sup & vnicc))
2235                 return -EOPNOTSUPP;
2236
2237         /* set enable/disable command and store wanted characteristic */
2238         if (state) {
2239                 cmd = IPA_VNICC_ENABLE;
2240                 card->options.vnicc.wanted_chars |= vnicc;
2241         } else {
2242                 cmd = IPA_VNICC_DISABLE;
2243                 card->options.vnicc.wanted_chars &= ~vnicc;
2244         }
2245
2246         /* do we need to do anything? */
2247         if (card->options.vnicc.cur_chars == card->options.vnicc.wanted_chars)
2248                 return rc;
2249
2250         /* if card is not ready, simply stop here */
2251         if (!qeth_card_hw_is_reachable(card)) {
2252                 if (state)
2253                         card->options.vnicc.cur_chars |= vnicc;
2254                 else
2255                         card->options.vnicc.cur_chars &= ~vnicc;
2256                 return rc;
2257         }
2258
2259         rc = qeth_l2_vnicc_set_char(card, vnicc, cmd);
2260         if (rc)
2261                 card->options.vnicc.wanted_chars =
2262                         card->options.vnicc.cur_chars;
2263         else {
2264                 /* successful online VNICC change; handle special cases */
2265                 if (state && vnicc == QETH_VNICC_RX_BCAST)
2266                         card->options.vnicc.rx_bcast_enabled = true;
2267                 if (!state && vnicc == QETH_VNICC_LEARNING)
2268                         qeth_l2_vnicc_recover_timeout(card, vnicc,
2269                                         &card->options.vnicc.learning_timeout);
2270         }
2271
2272         return rc;
2273 }
2274
2275 /* get current VNICC flag state; called from sysfs show function */
2276 int qeth_l2_vnicc_get_state(struct qeth_card *card, u32 vnicc, bool *state)
2277 {
2278         int rc = 0;
2279
2280         QETH_CARD_TEXT(card, 2, "vniccgch");
2281
2282         /* do not get anything if BridgePort is enabled */
2283         if (qeth_bridgeport_is_in_use(card))
2284                 return -EBUSY;
2285
2286         /* check if characteristic is supported */
2287         if (!(card->options.vnicc.sup_chars & vnicc))
2288                 return -EOPNOTSUPP;
2289
2290         /* if card is ready, query current VNICC state */
2291         if (qeth_card_hw_is_reachable(card))
2292                 rc = qeth_l2_vnicc_query_chars(card);
2293
2294         *state = (card->options.vnicc.cur_chars & vnicc) ? true : false;
2295         return rc;
2296 }
2297
2298 /* set VNICC timeout; called from sysfs store function. Currently, only learning
2299  * supports timeout
2300  */
2301 int qeth_l2_vnicc_set_timeout(struct qeth_card *card, u32 timeout)
2302 {
2303         int rc = 0;
2304
2305         QETH_CARD_TEXT(card, 2, "vniccsto");
2306
2307         /* do not change anything if BridgePort is enabled */
2308         if (qeth_bridgeport_is_in_use(card))
2309                 return -EBUSY;
2310
2311         /* check if characteristic and set_timeout are supported */
2312         if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
2313             !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
2314                 return -EOPNOTSUPP;
2315
2316         /* do we need to do anything? */
2317         if (card->options.vnicc.learning_timeout == timeout)
2318                 return rc;
2319
2320         /* if card is not ready, simply store the value internally and return */
2321         if (!qeth_card_hw_is_reachable(card)) {
2322                 card->options.vnicc.learning_timeout = timeout;
2323                 return rc;
2324         }
2325
2326         /* send timeout value to card; if successful, store value internally */
2327         rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
2328                                           IPA_VNICC_SET_TIMEOUT, &timeout);
2329         if (!rc)
2330                 card->options.vnicc.learning_timeout = timeout;
2331
2332         return rc;
2333 }
2334
2335 /* get current VNICC timeout; called from sysfs show function. Currently, only
2336  * learning supports timeout
2337  */
2338 int qeth_l2_vnicc_get_timeout(struct qeth_card *card, u32 *timeout)
2339 {
2340         int rc = 0;
2341
2342         QETH_CARD_TEXT(card, 2, "vniccgto");
2343
2344         /* do not get anything if BridgePort is enabled */
2345         if (qeth_bridgeport_is_in_use(card))
2346                 return -EBUSY;
2347
2348         /* check if characteristic and get_timeout are supported */
2349         if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
2350             !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
2351                 return -EOPNOTSUPP;
2352         /* if card is ready, get timeout. Otherwise, just return stored value */
2353         *timeout = card->options.vnicc.learning_timeout;
2354         if (qeth_card_hw_is_reachable(card))
2355                 rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
2356                                                   IPA_VNICC_GET_TIMEOUT,
2357                                                   timeout);
2358
2359         return rc;
2360 }
2361
2362 /* check if VNICC is currently enabled */
2363 bool qeth_l2_vnicc_is_in_use(struct qeth_card *card)
2364 {
2365         /* if everything is turned off, VNICC is not active */
2366         if (!card->options.vnicc.cur_chars)
2367                 return false;
2368         /* default values are only OK if rx_bcast was not enabled by user
2369          * or the card is offline.
2370          */
2371         if (card->options.vnicc.cur_chars == QETH_VNICC_DEFAULT) {
2372                 if (!card->options.vnicc.rx_bcast_enabled ||
2373                     !qeth_card_hw_is_reachable(card))
2374                         return false;
2375         }
2376         return true;
2377 }
2378
2379 /* recover user timeout setting */
2380 static bool qeth_l2_vnicc_recover_timeout(struct qeth_card *card, u32 vnicc,
2381                                           u32 *timeout)
2382 {
2383         if (card->options.vnicc.sup_chars & vnicc &&
2384             card->options.vnicc.getset_timeout_sup & vnicc &&
2385             !qeth_l2_vnicc_getset_timeout(card, vnicc, IPA_VNICC_SET_TIMEOUT,
2386                                           timeout))
2387                 return false;
2388         *timeout = QETH_VNICC_DEFAULT_TIMEOUT;
2389         return true;
2390 }
2391
2392 /* recover user characteristic setting */
2393 static bool qeth_l2_vnicc_recover_char(struct qeth_card *card, u32 vnicc,
2394                                        bool enable)
2395 {
2396         u32 cmd = enable ? IPA_VNICC_ENABLE : IPA_VNICC_DISABLE;
2397
2398         if (card->options.vnicc.sup_chars & vnicc &&
2399             card->options.vnicc.set_char_sup & vnicc &&
2400             !qeth_l2_vnicc_set_char(card, vnicc, cmd))
2401                 return false;
2402         card->options.vnicc.wanted_chars &= ~vnicc;
2403         card->options.vnicc.wanted_chars |= QETH_VNICC_DEFAULT & vnicc;
2404         return true;
2405 }
2406
2407 /* (re-)initialize VNICC */
2408 static void qeth_l2_vnicc_init(struct qeth_card *card)
2409 {
2410         u32 *timeout = &card->options.vnicc.learning_timeout;
2411         unsigned int chars_len, i;
2412         unsigned long chars_tmp;
2413         u32 sup_cmds, vnicc;
2414         bool enable, error;
2415
2416         QETH_CARD_TEXT(card, 2, "vniccini");
2417         /* reset rx_bcast */
2418         card->options.vnicc.rx_bcast_enabled = 0;
2419         /* initial query and storage of VNIC characteristics */
2420         if (qeth_l2_vnicc_query_chars(card)) {
2421                 if (card->options.vnicc.wanted_chars != QETH_VNICC_DEFAULT ||
2422                     *timeout != QETH_VNICC_DEFAULT_TIMEOUT)
2423                         dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
2424                 /* fail quietly if user didn't change the default config */
2425                 card->options.vnicc.sup_chars = 0;
2426                 card->options.vnicc.cur_chars = 0;
2427                 card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
2428                 return;
2429         }
2430         /* get supported commands for each supported characteristic */
2431         chars_tmp = card->options.vnicc.sup_chars;
2432         chars_len = sizeof(card->options.vnicc.sup_chars) * BITS_PER_BYTE;
2433         for_each_set_bit(i, &chars_tmp, chars_len) {
2434                 vnicc = BIT(i);
2435                 qeth_l2_vnicc_query_cmds(card, vnicc, &sup_cmds);
2436                 if (!(sup_cmds & IPA_VNICC_SET_TIMEOUT) ||
2437                     !(sup_cmds & IPA_VNICC_GET_TIMEOUT))
2438                         card->options.vnicc.getset_timeout_sup &= ~vnicc;
2439                 if (!(sup_cmds & IPA_VNICC_ENABLE) ||
2440                     !(sup_cmds & IPA_VNICC_DISABLE))
2441                         card->options.vnicc.set_char_sup &= ~vnicc;
2442         }
2443         /* enforce assumed default values and recover settings, if changed  */
2444         error = qeth_l2_vnicc_recover_timeout(card, QETH_VNICC_LEARNING,
2445                                               timeout);
2446         chars_tmp = card->options.vnicc.wanted_chars ^ QETH_VNICC_DEFAULT;
2447         chars_tmp |= QETH_VNICC_BRIDGE_INVISIBLE;
2448         chars_len = sizeof(card->options.vnicc.wanted_chars) * BITS_PER_BYTE;
2449         for_each_set_bit(i, &chars_tmp, chars_len) {
2450                 vnicc = BIT(i);
2451                 enable = card->options.vnicc.wanted_chars & vnicc;
2452                 error |= qeth_l2_vnicc_recover_char(card, vnicc, enable);
2453         }
2454         if (error)
2455                 dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
2456 }
2457
2458 /* configure default values of VNIC characteristics */
2459 static void qeth_l2_vnicc_set_defaults(struct qeth_card *card)
2460 {
2461         /* characteristics values */
2462         card->options.vnicc.sup_chars = QETH_VNICC_ALL;
2463         card->options.vnicc.cur_chars = QETH_VNICC_DEFAULT;
2464         card->options.vnicc.learning_timeout = QETH_VNICC_DEFAULT_TIMEOUT;
2465         /* supported commands */
2466         card->options.vnicc.set_char_sup = QETH_VNICC_ALL;
2467         card->options.vnicc.getset_timeout_sup = QETH_VNICC_LEARNING;
2468         /* settings wanted by users */
2469         card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
2470 }
2471
2472 module_init(qeth_l2_init);
2473 module_exit(qeth_l2_exit);
2474 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
2475 MODULE_DESCRIPTION("qeth layer 2 discipline");
2476 MODULE_LICENSE("GPL");