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(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(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         /* avoid racing against concurrent state change: */
 505         if (!mutex_trylock(&card->conf_mutex))
 506                 return -EAGAIN;
 507
 508         if (!qeth_card_hw_is_reachable(card)) {
 509                 ether_addr_copy(dev->dev_addr, addr->sa_data);
 510                 goto out_unlock;
 511         }
 512
 513         /* don't register the same address twice */
 514         if (ether_addr_equal_64bits(dev->dev_addr, addr->sa_data) &&
 515             (card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
 516                 goto out_unlock;
 517
 518         /* add the new address, switch over, drop the old */
 519         rc = qeth_l2_send_setmac(card, addr->sa_data);
 520         if (rc)
 521                 goto out_unlock;
 522         ether_addr_copy(old_addr, dev->dev_addr);
 523         ether_addr_copy(dev->dev_addr, addr->sa_data);
 524
 525         if (card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED)
 526                 qeth_l2_remove_mac(card, old_addr);
 527         card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 528
 529 out_unlock:
 530         mutex_unlock(&card->conf_mutex);
 531         return rc;
 532 }
 533
 534 static void qeth_promisc_to_bridge(struct qeth_card *card)
 535 {
 536         struct net_device *dev = card->dev;
 537         enum qeth_ipa_promisc_modes promisc_mode;
 538         int role;
 539         int rc;
 540
 541         QETH_CARD_TEXT(card, 3, "pmisc2br");
 542
 543         if (!card->options.sbp.reflect_promisc)
 544                 return;
 545         promisc_mode = (dev->flags & IFF_PROMISC) ? SET_PROMISC_MODE_ON
 546                                                 : SET_PROMISC_MODE_OFF;
 547         if (promisc_mode == card->info.promisc_mode)
 548                 return;
 549
 550         if (promisc_mode == SET_PROMISC_MODE_ON) {
 551                 if (card->options.sbp.reflect_promisc_primary)
 552                         role = QETH_SBP_ROLE_PRIMARY;
 553                 else
 554                         role = QETH_SBP_ROLE_SECONDARY;
 555         } else
 556                 role = QETH_SBP_ROLE_NONE;
 557
 558         rc = qeth_bridgeport_setrole(card, role);
 559         QETH_DBF_TEXT_(SETUP, 2, "bpm%c%04x",
 560                         (promisc_mode == SET_PROMISC_MODE_ON) ? '+' : '-', rc);
 561         if (!rc) {
 562                 card->options.sbp.role = role;
 563                 card->info.promisc_mode = promisc_mode;
 564         }
 565
 566 }
 567 /* New MAC address is added to the hash table and marked to be written on card
 568  * only if there is not in the hash table storage already
 569  *
 570 */
 571 static void qeth_l2_add_mac(struct qeth_card *card, struct netdev_hw_addr *ha)
 572 {
 573         u32 mac_hash = get_unaligned((u32 *)(&ha->addr[2]));
 574         struct qeth_mac *mac;
 575
 576         hash_for_each_possible(card->mac_htable, mac, hnode, mac_hash) {
 577                 if (ether_addr_equal_64bits(ha->addr, mac->mac_addr)) {
 578                         mac->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
 579                         return;
 580                 }
 581         }
 582
 583         mac = kzalloc(sizeof(struct qeth_mac), GFP_ATOMIC);
 584         if (!mac)
 585                 return;
 586
 587         ether_addr_copy(mac->mac_addr, ha->addr);
 588         mac->disp_flag = QETH_DISP_ADDR_ADD;
 589
 590         hash_add(card->mac_htable, &mac->hnode, mac_hash);
 591 }
 592
 593 static void qeth_l2_set_rx_mode(struct net_device *dev)
 594 {
 595         struct qeth_card *card = dev->ml_priv;
 596         struct netdev_hw_addr *ha;
 597         struct qeth_mac *mac;
 598         struct hlist_node *tmp;
 599         int i;
 600         int rc;
 601
 602         if (card->info.type == QETH_CARD_TYPE_OSN)
 603                 return;
 604
 605         QETH_CARD_TEXT(card, 3, "setmulti");
 606         if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
 607             (card->state != CARD_STATE_UP))
 608                 return;
 609
 610         spin_lock_bh(&card->mclock);
 611
 612         netdev_for_each_mc_addr(ha, dev)
 613                 qeth_l2_add_mac(card, ha);
 614         netdev_for_each_uc_addr(ha, dev)
 615                 qeth_l2_add_mac(card, ha);
 616
 617         hash_for_each_safe(card->mac_htable, i, tmp, mac, hnode) {
 618                 switch (mac->disp_flag) {
 619                 case QETH_DISP_ADDR_DELETE:
 620                         qeth_l2_remove_mac(card, mac->mac_addr);
 621                         hash_del(&mac->hnode);
 622                         kfree(mac);
 623                         break;
 624                 case QETH_DISP_ADDR_ADD:
 625                         rc = qeth_l2_write_mac(card, mac->mac_addr);
 626                         if (rc) {
 627                                 hash_del(&mac->hnode);
 628                                 kfree(mac);
 629                                 break;
 630                         }
 631                         /* fall through */
 632                 default:
 633                         /* for next call to set_rx_mode(): */
 634                         mac->disp_flag = QETH_DISP_ADDR_DELETE;
 635                 }
 636         }
 637
 638         spin_unlock_bh(&card->mclock);
 639
 640         if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
 641                 qeth_setadp_promisc_mode(card);
 642         else
 643                 qeth_promisc_to_bridge(card);
 644 }
 645
 646 static int qeth_l2_xmit_iqd(struct qeth_card *card, struct sk_buff *skb,
 647                             struct qeth_qdio_out_q *queue, int cast_type)
 648 {
 649         unsigned int data_offset = ETH_HLEN;
 650         struct qeth_hdr *hdr;
 651         int rc;
 652
 653         hdr = kmem_cache_alloc(qeth_core_header_cache, GFP_ATOMIC);
 654         if (!hdr)
 655                 return -ENOMEM;
 656         qeth_l2_fill_header(hdr, skb, cast_type, skb->len);
 657         skb_copy_from_linear_data(skb, ((char *)hdr) + sizeof(*hdr),
 658                                   data_offset);
 659
 660         if (!qeth_get_elements_no(card, skb, 1, data_offset)) {
 661                 rc = -E2BIG;
 662                 goto out;
 663         }
 664         rc = qeth_do_send_packet_fast(queue, skb, hdr, data_offset,
 665                                       sizeof(*hdr) + data_offset);
 666 out:
 667         if (rc)
 668                 kmem_cache_free(qeth_core_header_cache, hdr);
 669         return rc;
 670 }
 671
 672 static int qeth_l2_xmit_osa(struct qeth_card *card, struct sk_buff *skb,
 673                             struct qeth_qdio_out_q *queue, int cast_type,
 674                             int ipv)
 675 {
 676         int push_len = sizeof(struct qeth_hdr);
 677         unsigned int elements, nr_frags;
 678         unsigned int hdr_elements = 0;
 679         struct qeth_hdr *hdr = NULL;
 680         unsigned int hd_len = 0;
 681         int rc;
 682
 683         /* fix hardware limitation: as long as we do not have sbal
 684          * chaining we can not send long frag lists
 685          */
 686         if (!qeth_get_elements_no(card, skb, 0, 0)) {
 687                 rc = skb_linearize(skb);
 688
 689                 if (card->options.performance_stats) {
 690                         if (rc)
 691                                 card->perf_stats.tx_linfail++;
 692                         else
 693                                 card->perf_stats.tx_lin++;
 694                 }
 695                 if (rc)
 696                         return rc;
 697         }
 698         nr_frags = skb_shinfo(skb)->nr_frags;
 699
 700         rc = skb_cow_head(skb, push_len);
 701         if (rc)
 702                 return rc;
 703         push_len = qeth_push_hdr(skb, &hdr, push_len);
 704         if (push_len < 0)
 705                 return push_len;
 706         if (!push_len) {
 707                 /* hdr was allocated from cache */
 708                 hd_len = sizeof(*hdr);
 709                 hdr_elements = 1;
 710         }
 711         qeth_l2_fill_header(hdr, skb, cast_type, skb->len - push_len);
 712         if (skb->ip_summed == CHECKSUM_PARTIAL) {
 713                 qeth_tx_csum(skb, &hdr->hdr.l2.flags[1], ipv);
 714                 if (card->options.performance_stats)
 715                         card->perf_stats.tx_csum++;
 716         }
 717
 718         elements = qeth_get_elements_no(card, skb, hdr_elements, 0);
 719         if (!elements) {
 720                 rc = -E2BIG;
 721                 goto out;
 722         }
 723         elements += hdr_elements;
 724
 725         /* TODO: remove the skb_orphan() once TX completion is fast enough */
 726         skb_orphan(skb);
 727         rc = qeth_do_send_packet(card, queue, skb, hdr, 0, hd_len, elements);
 728 out:
 729         if (!rc) {
 730                 if (card->options.performance_stats && nr_frags) {
 731                         card->perf_stats.sg_skbs_sent++;
 732                         /* nr_frags + skb->data */
 733                         card->perf_stats.sg_frags_sent += nr_frags + 1;
 734                 }
 735         } else {
 736                 if (hd_len)
 737                         kmem_cache_free(qeth_core_header_cache, hdr);
 738                 if (rc == -EBUSY)
 739                         /* roll back to ETH header */
 740                         skb_pull(skb, push_len);
 741         }
 742         return rc;
 743 }
 744
 745 static int qeth_l2_xmit_osn(struct qeth_card *card, struct sk_buff *skb,
 746                             struct qeth_qdio_out_q *queue)
 747 {
 748         unsigned int elements;
 749         struct qeth_hdr *hdr;
 750
 751         if (skb->protocol == htons(ETH_P_IPV6))
 752                 return -EPROTONOSUPPORT;
 753
 754         hdr = (struct qeth_hdr *)skb->data;
 755         elements = qeth_get_elements_no(card, skb, 0, 0);
 756         if (!elements)
 757                 return -E2BIG;
 758         if (qeth_hdr_chk_and_bounce(skb, &hdr, sizeof(*hdr)))
 759                 return -EINVAL;
 760         return qeth_do_send_packet(card, queue, skb, hdr, 0, 0, elements);
 761 }
 762
 763 static netdev_tx_t qeth_l2_hard_start_xmit(struct sk_buff *skb,
 764                                            struct net_device *dev)
 765 {
 766         struct qeth_card *card = dev->ml_priv;
 767         int cast_type = qeth_l2_get_cast_type(card, skb);
 768         int ipv = qeth_get_ip_version(skb);
 769         struct qeth_qdio_out_q *queue;
 770         int tx_bytes = skb->len;
 771         int rc;
 772
 773         if (card->qdio.do_prio_queueing || (cast_type &&
 774                                         card->info.is_multicast_different))
 775                 queue = card->qdio.out_qs[qeth_get_priority_queue(card, skb,
 776                                         ipv, cast_type)];
 777         else
 778                 queue = card->qdio.out_qs[card->qdio.default_out_queue];
 779
 780         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
 781                 card->stats.tx_carrier_errors++;
 782                 goto tx_drop;
 783         }
 784
 785         if (card->options.performance_stats) {
 786                 card->perf_stats.outbound_cnt++;
 787                 card->perf_stats.outbound_start_time = qeth_get_micros();
 788         }
 789         netif_stop_queue(dev);
 790
 791         switch (card->info.type) {
 792         case QETH_CARD_TYPE_OSN:
 793                 rc = qeth_l2_xmit_osn(card, skb, queue);
 794                 break;
 795         case QETH_CARD_TYPE_IQD:
 796                 rc = qeth_l2_xmit_iqd(card, skb, queue, cast_type);
 797                 break;
 798         default:
 799                 rc = qeth_l2_xmit_osa(card, skb, queue, cast_type, ipv);
 800         }
 801
 802         if (!rc) {
 803                 card->stats.tx_packets++;
 804                 card->stats.tx_bytes += tx_bytes;
 805                 if (card->options.performance_stats)
 806                         card->perf_stats.outbound_time += qeth_get_micros() -
 807                                 card->perf_stats.outbound_start_time;
 808                 netif_wake_queue(dev);
 809                 return NETDEV_TX_OK;
 810         } else if (rc == -EBUSY) {
 811                 return NETDEV_TX_BUSY;
 812         } /* else fall through */
 813
 814 tx_drop:
 815         card->stats.tx_dropped++;
 816         card->stats.tx_errors++;
 817         dev_kfree_skb_any(skb);
 818         netif_wake_queue(dev);
 819         return NETDEV_TX_OK;
 820 }
 821
 822 static int __qeth_l2_open(struct net_device *dev)
 823 {
 824         struct qeth_card *card = dev->ml_priv;
 825         int rc = 0;
 826
 827         QETH_CARD_TEXT(card, 4, "qethopen");
 828         if (card->state == CARD_STATE_UP)
 829                 return rc;
 830         if (card->state != CARD_STATE_SOFTSETUP)
 831                 return -ENODEV;
 832
 833         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
 834              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
 835                 QETH_CARD_TEXT(card, 4, "nomacadr");
 836                 return -EPERM;
 837         }
 838         card->data.state = CH_STATE_UP;
 839         card->state = CARD_STATE_UP;
 840         netif_start_queue(dev);
 841
 842         if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) {
 843                 napi_enable(&card->napi);
 844                 napi_schedule(&card->napi);
 845         } else
 846                 rc = -EIO;
 847         return rc;
 848 }
 849
 850 static int qeth_l2_open(struct net_device *dev)
 851 {
 852         struct qeth_card *card = dev->ml_priv;
 853
 854         QETH_CARD_TEXT(card, 5, "qethope_");
 855         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 856                 QETH_CARD_TEXT(card, 3, "openREC");
 857                 return -ERESTARTSYS;
 858         }
 859         return __qeth_l2_open(dev);
 860 }
 861
 862 static int qeth_l2_stop(struct net_device *dev)
 863 {
 864         struct qeth_card *card = dev->ml_priv;
 865
 866         QETH_CARD_TEXT(card, 4, "qethstop");
 867         netif_tx_disable(dev);
 868         if (card->state == CARD_STATE_UP) {
 869                 card->state = CARD_STATE_SOFTSETUP;
 870                 napi_disable(&card->napi);
 871         }
 872         return 0;
 873 }
 874
 875 static const struct device_type qeth_l2_devtype = {
 876         .name = "qeth_layer2",
 877         .groups = qeth_l2_attr_groups,
 878 };
 879
 880 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 881 {
 882         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 883         int rc;
 884
 885         if (gdev->dev.type == &qeth_generic_devtype) {
 886                 rc = qeth_l2_create_device_attributes(&gdev->dev);
 887                 if (rc)
 888                         return rc;
 889         }
 890         INIT_LIST_HEAD(&card->vid_list);
 891         hash_init(card->mac_htable);
 892         card->options.layer2 = 1;
 893         card->info.hwtrap = 0;
 894         qeth_l2_vnicc_set_defaults(card);
 895         return 0;
 896 }
 897
 898 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
 899 {
 900         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
 901
 902         if (cgdev->dev.type == &qeth_generic_devtype)
 903                 qeth_l2_remove_device_attributes(&cgdev->dev);
 904         qeth_set_allowed_threads(card, 0, 1);
 905         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 906
 907         if (cgdev->state == CCWGROUP_ONLINE)
 908                 qeth_l2_set_offline(cgdev);
 909
 910         if (card->dev) {
 911                 unregister_netdev(card->dev);
 912                 free_netdev(card->dev);
 913                 card->dev = NULL;
 914         }
 915         return;
 916 }
 917
 918 static const struct ethtool_ops qeth_l2_ethtool_ops = {
 919         .get_link = ethtool_op_get_link,
 920         .get_strings = qeth_core_get_strings,
 921         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 922         .get_sset_count = qeth_core_get_sset_count,
 923         .get_drvinfo = qeth_core_get_drvinfo,
 924         .get_link_ksettings = qeth_core_ethtool_get_link_ksettings,
 925 };
 926
 927 static const struct ethtool_ops qeth_l2_osn_ops = {
 928         .get_strings = qeth_core_get_strings,
 929         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 930         .get_sset_count = qeth_core_get_sset_count,
 931         .get_drvinfo = qeth_core_get_drvinfo,
 932 };
 933
 934 static const struct net_device_ops qeth_l2_netdev_ops = {
 935         .ndo_open               = qeth_l2_open,
 936         .ndo_stop               = qeth_l2_stop,
 937         .ndo_get_stats          = qeth_get_stats,
 938         .ndo_start_xmit         = qeth_l2_hard_start_xmit,
 939         .ndo_features_check     = qeth_features_check,
 940         .ndo_validate_addr      = eth_validate_addr,
 941         .ndo_set_rx_mode        = qeth_l2_set_rx_mode,
 942         .ndo_do_ioctl           = qeth_do_ioctl,
 943         .ndo_set_mac_address    = qeth_l2_set_mac_address,
 944         .ndo_change_mtu         = qeth_change_mtu,
 945         .ndo_vlan_rx_add_vid    = qeth_l2_vlan_rx_add_vid,
 946         .ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,
 947         .ndo_tx_timeout         = qeth_tx_timeout,
 948         .ndo_fix_features       = qeth_fix_features,
 949         .ndo_set_features       = qeth_set_features
 950 };
 951
 952 static int qeth_l2_setup_netdev(struct qeth_card *card)
 953 {
 954         switch (card->info.type) {
 955         case QETH_CARD_TYPE_IQD:
 956                 card->dev = alloc_netdev(0, "hsi%d", NET_NAME_UNKNOWN,
 957                                          ether_setup);
 958                 break;
 959         case QETH_CARD_TYPE_OSN:
 960                 card->dev = alloc_netdev(0, "osn%d", NET_NAME_UNKNOWN,
 961                                          ether_setup);
 962                 break;
 963         default:
 964                 card->dev = alloc_etherdev(0);
 965         }
 966
 967         if (!card->dev)
 968                 return -ENODEV;
 969
 970         card->dev->ml_priv = card;
 971         card->dev->priv_flags |= IFF_UNICAST_FLT;
 972         card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
 973         card->dev->mtu = card->info.initial_mtu;
 974         card->dev->min_mtu = 64;
 975         card->dev->max_mtu = ETH_MAX_MTU;
 976         card->dev->dev_port = card->info.portno;
 977         card->dev->netdev_ops = &qeth_l2_netdev_ops;
 978         if (card->info.type == QETH_CARD_TYPE_OSN) {
 979                 card->dev->ethtool_ops = &qeth_l2_osn_ops;
 980                 card->dev->flags |= IFF_NOARP;
 981         } else {
 982                 card->dev->ethtool_ops = &qeth_l2_ethtool_ops;
 983         }
 984
 985         if (card->info.type == QETH_CARD_TYPE_OSM)
 986                 card->dev->features |= NETIF_F_VLAN_CHALLENGED;
 987         else
 988                 card->dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
 989
 990         if (card->info.type != QETH_CARD_TYPE_OSN &&
 991             card->info.type != QETH_CARD_TYPE_IQD) {
 992                 card->dev->priv_flags &= ~IFF_TX_SKB_SHARING;
 993                 card->dev->needed_headroom = sizeof(struct qeth_hdr);
 994                 card->dev->hw_features |= NETIF_F_SG;
 995                 card->dev->vlan_features |= NETIF_F_SG;
 996         }
 997
 998         if (card->info.type == QETH_CARD_TYPE_OSD && !card->info.guestlan) {
 999                 card->dev->features |= NETIF_F_SG;
1000                 /* OSA 3S and earlier has no RX/TX support */
1001                 if (qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM)) {
1002                         card->dev->hw_features |= NETIF_F_IP_CSUM;
1003                         card->dev->vlan_features |= NETIF_F_IP_CSUM;
1004                 }
1005         }
1006         if (qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) {
1007                 card->dev->hw_features |= NETIF_F_IPV6_CSUM;
1008                 card->dev->vlan_features |= NETIF_F_IPV6_CSUM;
1009         }
1010         if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM) ||
1011             qeth_is_supported6(card, IPA_INBOUND_CHECKSUM_V6)) {
1012                 card->dev->hw_features |= NETIF_F_RXCSUM;
1013                 card->dev->vlan_features |= NETIF_F_RXCSUM;
1014         }
1015
1016         card->info.broadcast_capable = 1;
1017         qeth_l2_request_initial_mac(card);
1018         SET_NETDEV_DEV(card->dev, &card->gdev->dev);
1019         netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT);
1020         netif_carrier_off(card->dev);
1021         return register_netdev(card->dev);
1022 }
1023
1024 static int qeth_l2_start_ipassists(struct qeth_card *card)
1025 {
1026         /* configure isolation level */
1027         if (qeth_set_access_ctrl_online(card, 0))
1028                 return -ENODEV;
1029         return 0;
1030 }
1031
1032 static void qeth_l2_trace_features(struct qeth_card *card)
1033 {
1034         /* Set BridgePort features */
1035         QETH_CARD_TEXT(card, 2, "featuSBP");
1036         QETH_CARD_HEX(card, 2, &card->options.sbp.supported_funcs,
1037                       sizeof(card->options.sbp.supported_funcs));
1038         /* VNIC Characteristics features */
1039         QETH_CARD_TEXT(card, 2, "feaVNICC");
1040         QETH_CARD_HEX(card, 2, &card->options.vnicc.sup_chars,
1041                       sizeof(card->options.vnicc.sup_chars));
1042 }
1043
1044 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
1045 {
1046         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1047         int rc = 0;
1048         enum qeth_card_states recover_flag;
1049
1050         mutex_lock(&card->discipline_mutex);
1051         mutex_lock(&card->conf_mutex);
1052         QETH_DBF_TEXT(SETUP, 2, "setonlin");
1053         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1054
1055         recover_flag = card->state;
1056         rc = qeth_core_hardsetup_card(card);
1057         if (rc) {
1058                 QETH_DBF_TEXT_(SETUP, 2, "2err%04x", rc);
1059                 rc = -ENODEV;
1060                 goto out_remove;
1061         }
1062         qeth_bridgeport_query_support(card);
1063         if (card->options.sbp.supported_funcs)
1064                 dev_info(&card->gdev->dev,
1065                 "The device represents a Bridge Capable Port\n");
1066
1067         if (!card->dev && qeth_l2_setup_netdev(card)) {
1068                 rc = -ENODEV;
1069                 goto out_remove;
1070         }
1071
1072         if (card->info.type != QETH_CARD_TYPE_OSN &&
1073             !qeth_l2_send_setmac(card, card->dev->dev_addr))
1074                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
1075
1076         if (qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP)) {
1077                 if (card->info.hwtrap &&
1078                     qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM))
1079                         card->info.hwtrap = 0;
1080         } else
1081                 card->info.hwtrap = 0;
1082
1083         /* for the rx_bcast characteristic, init VNICC after setmac */
1084         qeth_l2_vnicc_init(card);
1085
1086         qeth_trace_features(card);
1087         qeth_l2_trace_features(card);
1088
1089         qeth_l2_setup_bridgeport_attrs(card);
1090
1091         card->state = CARD_STATE_HARDSETUP;
1092         qeth_print_status_message(card);
1093
1094         /* softsetup */
1095         QETH_DBF_TEXT(SETUP, 2, "softsetp");
1096
1097         if ((card->info.type == QETH_CARD_TYPE_OSD) ||
1098             (card->info.type == QETH_CARD_TYPE_OSX)) {
1099                 rc = qeth_l2_start_ipassists(card);
1100                 if (rc)
1101                         goto out_remove;
1102         }
1103
1104         if (card->info.type != QETH_CARD_TYPE_OSN)
1105                 qeth_l2_process_vlans(card);
1106
1107         netif_tx_disable(card->dev);
1108
1109         rc = qeth_init_qdio_queues(card);
1110         if (rc) {
1111                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1112                 rc = -ENODEV;
1113                 goto out_remove;
1114         }
1115         card->state = CARD_STATE_SOFTSETUP;
1116         if (card->lan_online)
1117                 netif_carrier_on(card->dev);
1118         else
1119                 netif_carrier_off(card->dev);
1120
1121         qeth_set_allowed_threads(card, 0xffffffff, 0);
1122
1123         qeth_enable_hw_features(card->dev);
1124         if (recover_flag == CARD_STATE_RECOVER) {
1125                 if (recovery_mode &&
1126                     card->info.type != QETH_CARD_TYPE_OSN) {
1127                         __qeth_l2_open(card->dev);
1128                 } else {
1129                         rtnl_lock();
1130                         dev_open(card->dev);
1131                         rtnl_unlock();
1132                 }
1133                 /* this also sets saved unicast addresses */
1134                 qeth_l2_set_rx_mode(card->dev);
1135         }
1136         /* let user_space know that device is online */
1137         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1138         mutex_unlock(&card->conf_mutex);
1139         mutex_unlock(&card->discipline_mutex);
1140         return 0;
1141
1142 out_remove:
1143         qeth_l2_stop_card(card, 0);
1144         ccw_device_set_offline(CARD_DDEV(card));
1145         ccw_device_set_offline(CARD_WDEV(card));
1146         ccw_device_set_offline(CARD_RDEV(card));
1147         qdio_free(CARD_DDEV(card));
1148         if (recover_flag == CARD_STATE_RECOVER)
1149                 card->state = CARD_STATE_RECOVER;
1150         else
1151                 card->state = CARD_STATE_DOWN;
1152         mutex_unlock(&card->conf_mutex);
1153         mutex_unlock(&card->discipline_mutex);
1154         return rc;
1155 }
1156
1157 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1158 {
1159         return __qeth_l2_set_online(gdev, 0);
1160 }
1161
1162 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1163                                         int recovery_mode)
1164 {
1165         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1166         int rc = 0, rc2 = 0, rc3 = 0;
1167         enum qeth_card_states recover_flag;
1168
1169         mutex_lock(&card->discipline_mutex);
1170         mutex_lock(&card->conf_mutex);
1171         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1172         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1173
1174         if (card->dev && netif_carrier_ok(card->dev))
1175                 netif_carrier_off(card->dev);
1176         recover_flag = card->state;
1177         if ((!recovery_mode && card->info.hwtrap) || card->info.hwtrap == 2) {
1178                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1179                 card->info.hwtrap = 1;
1180         }
1181         qeth_l2_stop_card(card, recovery_mode);
1182         rc  = ccw_device_set_offline(CARD_DDEV(card));
1183         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1184         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1185         if (!rc)
1186                 rc = (rc2) ? rc2 : rc3;
1187         if (rc)
1188                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1189         qdio_free(CARD_DDEV(card));
1190         if (recover_flag == CARD_STATE_UP)
1191                 card->state = CARD_STATE_RECOVER;
1192         /* let user_space know that device is offline */
1193         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1194         mutex_unlock(&card->conf_mutex);
1195         mutex_unlock(&card->discipline_mutex);
1196         return 0;
1197 }
1198
1199 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1200 {
1201         return __qeth_l2_set_offline(cgdev, 0);
1202 }
1203
1204 static int qeth_l2_recover(void *ptr)
1205 {
1206         struct qeth_card *card;
1207         int rc = 0;
1208
1209         card = (struct qeth_card *) ptr;
1210         QETH_CARD_TEXT(card, 2, "recover1");
1211         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1212                 return 0;
1213         QETH_CARD_TEXT(card, 2, "recover2");
1214         dev_warn(&card->gdev->dev,
1215                 "A recovery process has been started for the device\n");
1216         qeth_set_recovery_task(card);
1217         __qeth_l2_set_offline(card->gdev, 1);
1218         rc = __qeth_l2_set_online(card->gdev, 1);
1219         if (!rc)
1220                 dev_info(&card->gdev->dev,
1221                         "Device successfully recovered!\n");
1222         else {
1223                 qeth_close_dev(card);
1224                 dev_warn(&card->gdev->dev, "The qeth device driver "
1225                                 "failed to recover an error on the device\n");
1226         }
1227         qeth_clear_recovery_task(card);
1228         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1229         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1230         return 0;
1231 }
1232
1233 static int __init qeth_l2_init(void)
1234 {
1235         pr_info("register layer 2 discipline\n");
1236         return 0;
1237 }
1238
1239 static void __exit qeth_l2_exit(void)
1240 {
1241         pr_info("unregister layer 2 discipline\n");
1242 }
1243
1244 static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev)
1245 {
1246         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1247
1248         if (card->dev)
1249                 netif_device_detach(card->dev);
1250         qeth_set_allowed_threads(card, 0, 1);
1251         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1252         if (gdev->state == CCWGROUP_OFFLINE)
1253                 return 0;
1254         if (card->state == CARD_STATE_UP) {
1255                 if (card->info.hwtrap)
1256                         qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1257                 __qeth_l2_set_offline(card->gdev, 1);
1258         } else
1259                 __qeth_l2_set_offline(card->gdev, 0);
1260         return 0;
1261 }
1262
1263 static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
1264 {
1265         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1266         int rc = 0;
1267
1268         if (gdev->state == CCWGROUP_OFFLINE)
1269                 goto out;
1270
1271         if (card->state == CARD_STATE_RECOVER) {
1272                 rc = __qeth_l2_set_online(card->gdev, 1);
1273                 if (rc) {
1274                         rtnl_lock();
1275                         dev_close(card->dev);
1276                         rtnl_unlock();
1277                 }
1278         } else
1279                 rc = __qeth_l2_set_online(card->gdev, 0);
1280 out:
1281         qeth_set_allowed_threads(card, 0xffffffff, 0);
1282         if (card->dev)
1283                 netif_device_attach(card->dev);
1284         if (rc)
1285                 dev_warn(&card->gdev->dev, "The qeth device driver "
1286                         "failed to recover an error on the device\n");
1287         return rc;
1288 }
1289
1290 /* Returns zero if the command is successfully "consumed" */
1291 static int qeth_l2_control_event(struct qeth_card *card,
1292                                         struct qeth_ipa_cmd *cmd)
1293 {
1294         switch (cmd->hdr.command) {
1295         case IPA_CMD_SETBRIDGEPORT_OSA:
1296         case IPA_CMD_SETBRIDGEPORT_IQD:
1297                 if (cmd->data.sbp.hdr.command_code ==
1298                                 IPA_SBP_BRIDGE_PORT_STATE_CHANGE) {
1299                         qeth_bridge_state_change(card, cmd);
1300                         return 0;
1301                 } else
1302                         return 1;
1303         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
1304                 qeth_bridge_host_event(card, cmd);
1305                 return 0;
1306         default:
1307                 return 1;
1308         }
1309 }
1310
1311 struct qeth_discipline qeth_l2_discipline = {
1312         .devtype = &qeth_l2_devtype,
1313         .process_rx_buffer = qeth_l2_process_inbound_buffer,
1314         .recover = qeth_l2_recover,
1315         .setup = qeth_l2_probe_device,
1316         .remove = qeth_l2_remove_device,
1317         .set_online = qeth_l2_set_online,
1318         .set_offline = qeth_l2_set_offline,
1319         .freeze = qeth_l2_pm_suspend,
1320         .thaw = qeth_l2_pm_resume,
1321         .restore = qeth_l2_pm_resume,
1322         .do_ioctl = NULL,
1323         .control_event_handler = qeth_l2_control_event,
1324 };
1325 EXPORT_SYMBOL_GPL(qeth_l2_discipline);
1326
1327 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1328                            struct qeth_cmd_buffer *iob)
1329 {
1330         unsigned long flags;
1331         int rc = 0;
1332
1333         QETH_CARD_TEXT(card, 5, "osndctrd");
1334
1335         wait_event(card->wait_q,
1336                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1337         qeth_prepare_control_data(card, len, iob);
1338         QETH_CARD_TEXT(card, 6, "osnoirqp");
1339         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1340         rc = ccw_device_start_timeout(CARD_WDEV(card), &card->write.ccw,
1341                                       (addr_t) iob, 0, 0, QETH_IPA_TIMEOUT);
1342         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1343         if (rc) {
1344                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1345                            "ccw_device_start rc = %i\n", rc);
1346                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1347                 qeth_release_buffer(iob->channel, iob);
1348                 atomic_set(&card->write.irq_pending, 0);
1349                 wake_up(&card->wait_q);
1350         }
1351         return rc;
1352 }
1353
1354 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1355                         struct qeth_cmd_buffer *iob, int data_len)
1356 {
1357         u16 s1, s2;
1358
1359         QETH_CARD_TEXT(card, 4, "osndipa");
1360
1361         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1362         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1363         s2 = (u16)data_len;
1364         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1365         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1366         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1367         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1368         return qeth_osn_send_control_data(card, s1, iob);
1369 }
1370
1371 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1372 {
1373         struct qeth_cmd_buffer *iob;
1374         struct qeth_card *card;
1375
1376         if (!dev)
1377                 return -ENODEV;
1378         card = dev->ml_priv;
1379         if (!card)
1380                 return -ENODEV;
1381         QETH_CARD_TEXT(card, 2, "osnsdmc");
1382         if (!qeth_card_hw_is_reachable(card))
1383                 return -ENODEV;
1384         iob = qeth_wait_for_buffer(&card->write);
1385         memcpy(__ipa_cmd(iob), data, data_len);
1386         return qeth_osn_send_ipa_cmd(card, iob, data_len);
1387 }
1388 EXPORT_SYMBOL(qeth_osn_assist);
1389
1390 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1391                   int (*assist_cb)(struct net_device *, void *),
1392                   int (*data_cb)(struct sk_buff *))
1393 {
1394         struct qeth_card *card;
1395
1396         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1397         if (*dev == NULL)
1398                 return -ENODEV;
1399         card = (*dev)->ml_priv;
1400         if (!card)
1401                 return -ENODEV;
1402         QETH_CARD_TEXT(card, 2, "osnreg");
1403         if ((assist_cb == NULL) || (data_cb == NULL))
1404                 return -EINVAL;
1405         card->osn_info.assist_cb = assist_cb;
1406         card->osn_info.data_cb = data_cb;
1407         return 0;
1408 }
1409 EXPORT_SYMBOL(qeth_osn_register);
1410
1411 void qeth_osn_deregister(struct net_device *dev)
1412 {
1413         struct qeth_card *card;
1414
1415         if (!dev)
1416                 return;
1417         card = dev->ml_priv;
1418         if (!card)
1419                 return;
1420         QETH_CARD_TEXT(card, 2, "osndereg");
1421         card->osn_info.assist_cb = NULL;
1422         card->osn_info.data_cb = NULL;
1423         return;
1424 }
1425 EXPORT_SYMBOL(qeth_osn_deregister);
1426
1427 /* SETBRIDGEPORT support, async notifications */
1428
1429 enum qeth_an_event_type {anev_reg_unreg, anev_abort, anev_reset};
1430
1431 /**
1432  * qeth_bridge_emit_host_event() - bridgeport address change notification
1433  * @card:  qeth_card structure pointer, for udev events.
1434  * @evtype:  "normal" register/unregister, or abort, or reset. For abort
1435  *            and reset token and addr_lnid are unused and may be NULL.
1436  * @code:  event bitmask: high order bit 0x80 value 1 means removal of an
1437  *                        object, 0 - addition of an object.
1438  *                        0x01 - VLAN, 0x02 - MAC, 0x03 - VLAN and MAC.
1439  * @token: "network token" structure identifying physical address of the port.
1440  * @addr_lnid: pointer to structure with MAC address and VLAN ID.
1441  *
1442  * This function is called when registrations and deregistrations are
1443  * reported by the hardware, and also when notifications are enabled -
1444  * for all currently registered addresses.
1445  */
1446 static void qeth_bridge_emit_host_event(struct qeth_card *card,
1447         enum qeth_an_event_type evtype,
1448         u8 code, struct net_if_token *token, struct mac_addr_lnid *addr_lnid)
1449 {
1450         char str[7][32];
1451         char *env[8];
1452         int i = 0;
1453
1454         switch (evtype) {
1455         case anev_reg_unreg:
1456                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=%s",
1457                                 (code & IPA_ADDR_CHANGE_CODE_REMOVAL)
1458                                 ? "deregister" : "register");
1459                 env[i] = str[i]; i++;
1460                 if (code & IPA_ADDR_CHANGE_CODE_VLANID) {
1461                         snprintf(str[i], sizeof(str[i]), "VLAN=%d",
1462                                 addr_lnid->lnid);
1463                         env[i] = str[i]; i++;
1464                 }
1465                 if (code & IPA_ADDR_CHANGE_CODE_MACADDR) {
1466                         snprintf(str[i], sizeof(str[i]), "MAC=%pM",
1467                                 addr_lnid->mac);
1468                         env[i] = str[i]; i++;
1469                 }
1470                 snprintf(str[i], sizeof(str[i]), "NTOK_BUSID=%x.%x.%04x",
1471                         token->cssid, token->ssid, token->devnum);
1472                 env[i] = str[i]; i++;
1473                 snprintf(str[i], sizeof(str[i]), "NTOK_IID=%02x", token->iid);
1474                 env[i] = str[i]; i++;
1475                 snprintf(str[i], sizeof(str[i]), "NTOK_CHPID=%02x",
1476                                 token->chpid);
1477                 env[i] = str[i]; i++;
1478                 snprintf(str[i], sizeof(str[i]), "NTOK_CHID=%04x", token->chid);
1479                 env[i] = str[i]; i++;
1480                 break;
1481         case anev_abort:
1482                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=abort");
1483                 env[i] = str[i]; i++;
1484                 break;
1485         case anev_reset:
1486                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=reset");
1487                 env[i] = str[i]; i++;
1488                 break;
1489         }
1490         env[i] = NULL;
1491         kobject_uevent_env(&card->gdev->dev.kobj, KOBJ_CHANGE, env);
1492 }
1493
1494 struct qeth_bridge_state_data {
1495         struct work_struct worker;
1496         struct qeth_card *card;
1497         struct qeth_sbp_state_change qports;
1498 };
1499
1500 static void qeth_bridge_state_change_worker(struct work_struct *work)
1501 {
1502         struct qeth_bridge_state_data *data =
1503                 container_of(work, struct qeth_bridge_state_data, worker);
1504         /* We are only interested in the first entry - local port */
1505         struct qeth_sbp_port_entry *entry = &data->qports.entry[0];
1506         char env_locrem[32];
1507         char env_role[32];
1508         char env_state[32];
1509         char *env[] = {
1510                 env_locrem,
1511                 env_role,
1512                 env_state,
1513                 NULL
1514         };
1515
1516         /* Role should not change by itself, but if it did, */
1517         /* information from the hardware is authoritative.  */
1518         mutex_lock(&data->card->conf_mutex);
1519         data->card->options.sbp.role = entry->role;
1520         mutex_unlock(&data->card->conf_mutex);
1521
1522         snprintf(env_locrem, sizeof(env_locrem), "BRIDGEPORT=statechange");
1523         snprintf(env_role, sizeof(env_role), "ROLE=%s",
1524                 (entry->role == QETH_SBP_ROLE_NONE) ? "none" :
1525                 (entry->role == QETH_SBP_ROLE_PRIMARY) ? "primary" :
1526                 (entry->role == QETH_SBP_ROLE_SECONDARY) ? "secondary" :
1527                 "<INVALID>");
1528         snprintf(env_state, sizeof(env_state), "STATE=%s",
1529                 (entry->state == QETH_SBP_STATE_INACTIVE) ? "inactive" :
1530                 (entry->state == QETH_SBP_STATE_STANDBY) ? "standby" :
1531                 (entry->state == QETH_SBP_STATE_ACTIVE) ? "active" :
1532                 "<INVALID>");
1533         kobject_uevent_env(&data->card->gdev->dev.kobj,
1534                                 KOBJ_CHANGE, env);
1535         kfree(data);
1536 }
1537
1538 static void qeth_bridge_state_change(struct qeth_card *card,
1539                                         struct qeth_ipa_cmd *cmd)
1540 {
1541         struct qeth_sbp_state_change *qports =
1542                  &cmd->data.sbp.data.state_change;
1543         struct qeth_bridge_state_data *data;
1544         int extrasize;
1545
1546         QETH_CARD_TEXT(card, 2, "brstchng");
1547         if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1548                 QETH_CARD_TEXT_(card, 2, "BPsz%04x", qports->entry_length);
1549                 return;
1550         }
1551         extrasize = sizeof(struct qeth_sbp_port_entry) * qports->num_entries;
1552         data = kzalloc(sizeof(struct qeth_bridge_state_data) + extrasize,
1553                 GFP_ATOMIC);
1554         if (!data) {
1555                 QETH_CARD_TEXT(card, 2, "BPSalloc");
1556                 return;
1557         }
1558         INIT_WORK(&data->worker, qeth_bridge_state_change_worker);
1559         data->card = card;
1560         memcpy(&data->qports, qports,
1561                         sizeof(struct qeth_sbp_state_change) + extrasize);
1562         queue_work(qeth_wq, &data->worker);
1563 }
1564
1565 struct qeth_bridge_host_data {
1566         struct work_struct worker;
1567         struct qeth_card *card;
1568         struct qeth_ipacmd_addr_change hostevs;
1569 };
1570
1571 static void qeth_bridge_host_event_worker(struct work_struct *work)
1572 {
1573         struct qeth_bridge_host_data *data =
1574                 container_of(work, struct qeth_bridge_host_data, worker);
1575         int i;
1576
1577         if (data->hostevs.lost_event_mask) {
1578                 dev_info(&data->card->gdev->dev,
1579 "Address notification from the Bridge Port stopped %s (%s)\n",
1580                         data->card->dev->name,
1581                         (data->hostevs.lost_event_mask == 0x01)
1582                         ? "Overflow"
1583                         : (data->hostevs.lost_event_mask == 0x02)
1584                         ? "Bridge port state change"
1585                         : "Unknown reason");
1586                 mutex_lock(&data->card->conf_mutex);
1587                 data->card->options.sbp.hostnotification = 0;
1588                 mutex_unlock(&data->card->conf_mutex);
1589                 qeth_bridge_emit_host_event(data->card, anev_abort,
1590                         0, NULL, NULL);
1591         } else
1592                 for (i = 0; i < data->hostevs.num_entries; i++) {
1593                         struct qeth_ipacmd_addr_change_entry *entry =
1594                                         &data->hostevs.entry[i];
1595                         qeth_bridge_emit_host_event(data->card,
1596                                         anev_reg_unreg,
1597                                         entry->change_code,
1598                                         &entry->token, &entry->addr_lnid);
1599                 }
1600         kfree(data);
1601 }
1602
1603 static void qeth_bridge_host_event(struct qeth_card *card,
1604                                         struct qeth_ipa_cmd *cmd)
1605 {
1606         struct qeth_ipacmd_addr_change *hostevs =
1607                  &cmd->data.addrchange;
1608         struct qeth_bridge_host_data *data;
1609         int extrasize;
1610
1611         QETH_CARD_TEXT(card, 2, "brhostev");
1612         if (cmd->hdr.return_code != 0x0000) {
1613                 if (cmd->hdr.return_code == 0x0010) {
1614                         if (hostevs->lost_event_mask == 0x00)
1615                                 hostevs->lost_event_mask = 0xff;
1616                 } else {
1617                         QETH_CARD_TEXT_(card, 2, "BPHe%04x",
1618                                 cmd->hdr.return_code);
1619                         return;
1620                 }
1621         }
1622         extrasize = sizeof(struct qeth_ipacmd_addr_change_entry) *
1623                                                 hostevs->num_entries;
1624         data = kzalloc(sizeof(struct qeth_bridge_host_data) + extrasize,
1625                 GFP_ATOMIC);
1626         if (!data) {
1627                 QETH_CARD_TEXT(card, 2, "BPHalloc");
1628                 return;
1629         }
1630         INIT_WORK(&data->worker, qeth_bridge_host_event_worker);
1631         data->card = card;
1632         memcpy(&data->hostevs, hostevs,
1633                         sizeof(struct qeth_ipacmd_addr_change) + extrasize);
1634         queue_work(qeth_wq, &data->worker);
1635 }
1636
1637 /* SETBRIDGEPORT support; sending commands */
1638
1639 struct _qeth_sbp_cbctl {
1640         u16 ipa_rc;
1641         u16 cmd_rc;
1642         union {
1643                 u32 supported;
1644                 struct {
1645                         enum qeth_sbp_roles *role;
1646                         enum qeth_sbp_states *state;
1647                 } qports;
1648         } data;
1649 };
1650
1651 /**
1652  * qeth_bridgeport_makerc() - derive "traditional" error from hardware codes.
1653  * @card:                     qeth_card structure pointer, for debug messages.
1654  * @cbctl:                    state structure with hardware return codes.
1655  * @setcmd:                   IPA command code
1656  *
1657  * Returns negative errno-compatible error indication or 0 on success.
1658  */
1659 static int qeth_bridgeport_makerc(struct qeth_card *card,
1660         struct _qeth_sbp_cbctl *cbctl, enum qeth_ipa_sbp_cmd setcmd)
1661 {
1662         int rc;
1663         int is_iqd = (card->info.type == QETH_CARD_TYPE_IQD);
1664
1665         if ((is_iqd && (cbctl->ipa_rc == IPA_RC_SUCCESS)) ||
1666             (!is_iqd && (cbctl->ipa_rc == cbctl->cmd_rc)))
1667                 switch (cbctl->cmd_rc) {
1668                 case IPA_RC_SUCCESS:
1669                         rc = 0;
1670                         break;
1671                 case IPA_RC_L2_UNSUPPORTED_CMD:
1672                 case IPA_RC_UNSUPPORTED_COMMAND:
1673                         rc = -EOPNOTSUPP;
1674                         break;
1675                 case IPA_RC_SBP_OSA_NOT_CONFIGURED:
1676                 case IPA_RC_SBP_IQD_NOT_CONFIGURED:
1677                         rc = -ENODEV; /* maybe not the best code here? */
1678                         dev_err(&card->gdev->dev,
1679         "The device is not configured as a Bridge Port\n");
1680                         break;
1681                 case IPA_RC_SBP_OSA_OS_MISMATCH:
1682                 case IPA_RC_SBP_IQD_OS_MISMATCH:
1683                         rc = -EPERM;
1684                         dev_err(&card->gdev->dev,
1685         "A Bridge Port is already configured by a different operating system\n");
1686                         break;
1687                 case IPA_RC_SBP_OSA_ANO_DEV_PRIMARY:
1688                 case IPA_RC_SBP_IQD_ANO_DEV_PRIMARY:
1689                         switch (setcmd) {
1690                         case IPA_SBP_SET_PRIMARY_BRIDGE_PORT:
1691                                 rc = -EEXIST;
1692                                 dev_err(&card->gdev->dev,
1693         "The LAN already has a primary Bridge Port\n");
1694                                 break;
1695                         case IPA_SBP_SET_SECONDARY_BRIDGE_PORT:
1696                                 rc = -EBUSY;
1697                                 dev_err(&card->gdev->dev,
1698         "The device is already a primary Bridge Port\n");
1699                                 break;
1700                         default:
1701                                 rc = -EIO;
1702                         }
1703                         break;
1704                 case IPA_RC_SBP_OSA_CURRENT_SECOND:
1705                 case IPA_RC_SBP_IQD_CURRENT_SECOND:
1706                         rc = -EBUSY;
1707                         dev_err(&card->gdev->dev,
1708         "The device is already a secondary Bridge Port\n");
1709                         break;
1710                 case IPA_RC_SBP_OSA_LIMIT_SECOND:
1711                 case IPA_RC_SBP_IQD_LIMIT_SECOND:
1712                         rc = -EEXIST;
1713                         dev_err(&card->gdev->dev,
1714         "The LAN cannot have more secondary Bridge Ports\n");
1715                         break;
1716                 case IPA_RC_SBP_OSA_CURRENT_PRIMARY:
1717                 case IPA_RC_SBP_IQD_CURRENT_PRIMARY:
1718                         rc = -EBUSY;
1719                         dev_err(&card->gdev->dev,
1720         "The device is already a primary Bridge Port\n");
1721                         break;
1722                 case IPA_RC_SBP_OSA_NOT_AUTHD_BY_ZMAN:
1723                 case IPA_RC_SBP_IQD_NOT_AUTHD_BY_ZMAN:
1724                         rc = -EACCES;
1725                         dev_err(&card->gdev->dev,
1726         "The device is not authorized to be a Bridge Port\n");
1727                         break;
1728                 default:
1729                         rc = -EIO;
1730                 }
1731         else
1732                 switch (cbctl->ipa_rc) {
1733                 case IPA_RC_NOTSUPP:
1734                         rc = -EOPNOTSUPP;
1735                         break;
1736                 case IPA_RC_UNSUPPORTED_COMMAND:
1737                         rc = -EOPNOTSUPP;
1738                         break;
1739                 default:
1740                         rc = -EIO;
1741                 }
1742
1743         if (rc) {
1744                 QETH_CARD_TEXT_(card, 2, "SBPi%04x", cbctl->ipa_rc);
1745                 QETH_CARD_TEXT_(card, 2, "SBPc%04x", cbctl->cmd_rc);
1746         }
1747         return rc;
1748 }
1749
1750 static struct qeth_cmd_buffer *qeth_sbp_build_cmd(struct qeth_card *card,
1751                                                   enum qeth_ipa_sbp_cmd sbp_cmd,
1752                                                   unsigned int cmd_length)
1753 {
1754         enum qeth_ipa_cmds ipa_cmd = (card->info.type == QETH_CARD_TYPE_IQD) ?
1755                                         IPA_CMD_SETBRIDGEPORT_IQD :
1756                                         IPA_CMD_SETBRIDGEPORT_OSA;
1757         struct qeth_cmd_buffer *iob;
1758         struct qeth_ipa_cmd *cmd;
1759
1760         iob = qeth_get_ipacmd_buffer(card, ipa_cmd, 0);
1761         if (!iob)
1762                 return iob;
1763         cmd = __ipa_cmd(iob);
1764         cmd->data.sbp.hdr.cmdlength = sizeof(struct qeth_ipacmd_sbp_hdr) +
1765                                       cmd_length;
1766         cmd->data.sbp.hdr.command_code = sbp_cmd;
1767         cmd->data.sbp.hdr.used_total = 1;
1768         cmd->data.sbp.hdr.seq_no = 1;
1769         return iob;
1770 }
1771
1772 static int qeth_bridgeport_query_support_cb(struct qeth_card *card,
1773         struct qeth_reply *reply, unsigned long data)
1774 {
1775         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1776         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1777         QETH_CARD_TEXT(card, 2, "brqsupcb");
1778         cbctl->ipa_rc = cmd->hdr.return_code;
1779         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1780         if ((cbctl->ipa_rc == 0) && (cbctl->cmd_rc == 0)) {
1781                 cbctl->data.supported =
1782                         cmd->data.sbp.data.query_cmds_supp.supported_cmds;
1783         } else {
1784                 cbctl->data.supported = 0;
1785         }
1786         return 0;
1787 }
1788
1789 /**
1790  * qeth_bridgeport_query_support() - store bitmask of supported subfunctions.
1791  * @card:                            qeth_card structure pointer.
1792  *
1793  * Sets bitmask of supported setbridgeport subfunctions in the qeth_card
1794  * strucutre: card->options.sbp.supported_funcs.
1795  */
1796 static void qeth_bridgeport_query_support(struct qeth_card *card)
1797 {
1798         struct qeth_cmd_buffer *iob;
1799         struct _qeth_sbp_cbctl cbctl;
1800
1801         QETH_CARD_TEXT(card, 2, "brqsuppo");
1802         iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_COMMANDS_SUPPORTED,
1803                                  sizeof(struct qeth_sbp_query_cmds_supp));
1804         if (!iob)
1805                 return;
1806         if (qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_support_cb,
1807                                                         (void *)&cbctl) ||
1808             qeth_bridgeport_makerc(card, &cbctl,
1809                                         IPA_SBP_QUERY_COMMANDS_SUPPORTED)) {
1810                 /* non-zero makerc signifies failure, and produce messages */
1811                 card->options.sbp.role = QETH_SBP_ROLE_NONE;
1812                 return;
1813         }
1814         card->options.sbp.supported_funcs = cbctl.data.supported;
1815 }
1816
1817 static int qeth_bridgeport_query_ports_cb(struct qeth_card *card,
1818         struct qeth_reply *reply, unsigned long data)
1819 {
1820         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1821         struct qeth_sbp_query_ports *qports = &cmd->data.sbp.data.query_ports;
1822         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1823
1824         QETH_CARD_TEXT(card, 2, "brqprtcb");
1825         cbctl->ipa_rc = cmd->hdr.return_code;
1826         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1827         if ((cbctl->ipa_rc != 0) || (cbctl->cmd_rc != 0))
1828                 return 0;
1829         if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1830                 cbctl->cmd_rc = 0xffff;
1831                 QETH_CARD_TEXT_(card, 2, "SBPs%04x", qports->entry_length);
1832                 return 0;
1833         }
1834         /* first entry contains the state of the local port */
1835         if (qports->num_entries > 0) {
1836                 if (cbctl->data.qports.role)
1837                         *cbctl->data.qports.role = qports->entry[0].role;
1838                 if (cbctl->data.qports.state)
1839                         *cbctl->data.qports.state = qports->entry[0].state;
1840         }
1841         return 0;
1842 }
1843
1844 /**
1845  * qeth_bridgeport_query_ports() - query local bridgeport status.
1846  * @card:                          qeth_card structure pointer.
1847  * @role:   Role of the port: 0-none, 1-primary, 2-secondary.
1848  * @state:  State of the port: 0-inactive, 1-standby, 2-active.
1849  *
1850  * Returns negative errno-compatible error indication or 0 on success.
1851  *
1852  * 'role' and 'state' are not updated in case of hardware operation failure.
1853  */
1854 int qeth_bridgeport_query_ports(struct qeth_card *card,
1855         enum qeth_sbp_roles *role, enum qeth_sbp_states *state)
1856 {
1857         int rc = 0;
1858         struct qeth_cmd_buffer *iob;
1859         struct _qeth_sbp_cbctl cbctl = {
1860                 .data = {
1861                         .qports = {
1862                                 .role = role,
1863                                 .state = state,
1864                         },
1865                 },
1866         };
1867
1868         QETH_CARD_TEXT(card, 2, "brqports");
1869         if (!(card->options.sbp.supported_funcs & IPA_SBP_QUERY_BRIDGE_PORTS))
1870                 return -EOPNOTSUPP;
1871         iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_BRIDGE_PORTS, 0);
1872         if (!iob)
1873                 return -ENOMEM;
1874         rc = qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_ports_cb,
1875                                 (void *)&cbctl);
1876         if (rc < 0)
1877                 return rc;
1878         return qeth_bridgeport_makerc(card, &cbctl, IPA_SBP_QUERY_BRIDGE_PORTS);
1879 }
1880 EXPORT_SYMBOL_GPL(qeth_bridgeport_query_ports);
1881
1882 static int qeth_bridgeport_set_cb(struct qeth_card *card,
1883         struct qeth_reply *reply, unsigned long data)
1884 {
1885         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
1886         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1887         QETH_CARD_TEXT(card, 2, "brsetrcb");
1888         cbctl->ipa_rc = cmd->hdr.return_code;
1889         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1890         return 0;
1891 }
1892
1893 /**
1894  * qeth_bridgeport_setrole() - Assign primary role to the port.
1895  * @card:                      qeth_card structure pointer.
1896  * @role:                      Role to assign.
1897  *
1898  * Returns negative errno-compatible error indication or 0 on success.
1899  */
1900 int qeth_bridgeport_setrole(struct qeth_card *card, enum qeth_sbp_roles role)
1901 {
1902         int rc = 0;
1903         int cmdlength;
1904         struct qeth_cmd_buffer *iob;
1905         struct _qeth_sbp_cbctl cbctl;
1906         enum qeth_ipa_sbp_cmd setcmd;
1907
1908         QETH_CARD_TEXT(card, 2, "brsetrol");
1909         switch (role) {
1910         case QETH_SBP_ROLE_NONE:
1911                 setcmd = IPA_SBP_RESET_BRIDGE_PORT_ROLE;
1912                 cmdlength = sizeof(struct qeth_sbp_reset_role);
1913                 break;
1914         case QETH_SBP_ROLE_PRIMARY:
1915                 setcmd = IPA_SBP_SET_PRIMARY_BRIDGE_PORT;
1916                 cmdlength = sizeof(struct qeth_sbp_set_primary);
1917                 break;
1918         case QETH_SBP_ROLE_SECONDARY:
1919                 setcmd = IPA_SBP_SET_SECONDARY_BRIDGE_PORT;
1920                 cmdlength = sizeof(struct qeth_sbp_set_secondary);
1921                 break;
1922         default:
1923                 return -EINVAL;
1924         }
1925         if (!(card->options.sbp.supported_funcs & setcmd))
1926                 return -EOPNOTSUPP;
1927         iob = qeth_sbp_build_cmd(card, setcmd, cmdlength);
1928         if (!iob)
1929                 return -ENOMEM;
1930         rc = qeth_send_ipa_cmd(card, iob, qeth_bridgeport_set_cb,
1931                                 (void *)&cbctl);
1932         if (rc < 0)
1933                 return rc;
1934         return qeth_bridgeport_makerc(card, &cbctl, setcmd);
1935 }
1936
1937 /**
1938  * qeth_anset_makerc() - derive "traditional" error from hardware codes.
1939  * @card:                     qeth_card structure pointer, for debug messages.
1940  *
1941  * Returns negative errno-compatible error indication or 0 on success.
1942  */
1943 static int qeth_anset_makerc(struct qeth_card *card, int pnso_rc, u16 response)
1944 {
1945         int rc;
1946
1947         if (pnso_rc == 0)
1948                 switch (response) {
1949                 case 0x0001:
1950                         rc = 0;
1951                         break;
1952                 case 0x0004:
1953                 case 0x0100:
1954                 case 0x0106:
1955                         rc = -EOPNOTSUPP;
1956                         dev_err(&card->gdev->dev,
1957                                 "Setting address notification failed\n");
1958                         break;
1959                 case 0x0107:
1960                         rc = -EAGAIN;
1961                         break;
1962                 default:
1963                         rc = -EIO;
1964                 }
1965         else
1966                 rc = -EIO;
1967
1968         if (rc) {
1969                 QETH_CARD_TEXT_(card, 2, "SBPp%04x", pnso_rc);
1970                 QETH_CARD_TEXT_(card, 2, "SBPr%04x", response);
1971         }
1972         return rc;
1973 }
1974
1975 static void qeth_bridgeport_an_set_cb(void *priv,
1976                 enum qdio_brinfo_entry_type type, void *entry)
1977 {
1978         struct qeth_card *card = (struct qeth_card *)priv;
1979         struct qdio_brinfo_entry_l2 *l2entry;
1980         u8 code;
1981
1982         if (type != l2_addr_lnid) {
1983                 WARN_ON_ONCE(1);
1984                 return;
1985         }
1986
1987         l2entry = (struct qdio_brinfo_entry_l2 *)entry;
1988         code = IPA_ADDR_CHANGE_CODE_MACADDR;
1989         if (l2entry->addr_lnid.lnid)
1990                 code |= IPA_ADDR_CHANGE_CODE_VLANID;
1991         qeth_bridge_emit_host_event(card, anev_reg_unreg, code,
1992                 (struct net_if_token *)&l2entry->nit,
1993                 (struct mac_addr_lnid *)&l2entry->addr_lnid);
1994 }
1995
1996 /**
1997  * qeth_bridgeport_an_set() - Enable or disable bridgeport address notification
1998  * @card:                     qeth_card structure pointer.
1999  * @enable:                   0 - disable, non-zero - enable notifications
2000  *
2001  * Returns negative errno-compatible error indication or 0 on success.
2002  *
2003  * On enable, emits a series of address notifications udev events for all
2004  * currently registered hosts.
2005  */
2006 int qeth_bridgeport_an_set(struct qeth_card *card, int enable)
2007 {
2008         int rc;
2009         u16 response;
2010         struct ccw_device *ddev;
2011         struct subchannel_id schid;
2012
2013         if (!card)
2014                 return -EINVAL;
2015         if (!card->options.sbp.supported_funcs)
2016                 return -EOPNOTSUPP;
2017         ddev = CARD_DDEV(card);
2018         ccw_device_get_schid(ddev, &schid);
2019
2020         if (enable) {
2021                 qeth_bridge_emit_host_event(card, anev_reset, 0, NULL, NULL);
2022                 rc = qdio_pnso_brinfo(schid, 1, &response,
2023                         qeth_bridgeport_an_set_cb, card);
2024         } else
2025                 rc = qdio_pnso_brinfo(schid, 0, &response, NULL, NULL);
2026         return qeth_anset_makerc(card, rc, response);
2027 }
2028 EXPORT_SYMBOL_GPL(qeth_bridgeport_an_set);
2029
2030 static bool qeth_bridgeport_is_in_use(struct qeth_card *card)
2031 {
2032         return (card->options.sbp.role || card->options.sbp.reflect_promisc ||
2033                 card->options.sbp.hostnotification);
2034 }
2035
2036 /* VNIC Characteristics support */
2037
2038 /* handle VNICC IPA command return codes; convert to error codes */
2039 static int qeth_l2_vnicc_makerc(struct qeth_card *card, int ipa_rc)
2040 {
2041         int rc;
2042
2043         switch (ipa_rc) {
2044         case IPA_RC_SUCCESS:
2045                 return ipa_rc;
2046         case IPA_RC_L2_UNSUPPORTED_CMD:
2047         case IPA_RC_NOTSUPP:
2048                 rc = -EOPNOTSUPP;
2049                 break;
2050         case IPA_RC_VNICC_OOSEQ:
2051                 rc = -EALREADY;
2052                 break;
2053         case IPA_RC_VNICC_VNICBP:
2054                 rc = -EBUSY;
2055                 break;
2056         case IPA_RC_L2_ADDR_TABLE_FULL:
2057                 rc = -ENOSPC;
2058                 break;
2059         case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
2060                 rc = -EACCES;
2061                 break;
2062         default:
2063                 rc = -EIO;
2064         }
2065
2066         QETH_CARD_TEXT_(card, 2, "err%04x", ipa_rc);
2067         return rc;
2068 }
2069
2070 /* generic VNICC request call back control */
2071 struct _qeth_l2_vnicc_request_cbctl {
2072         u32 sub_cmd;
2073         struct {
2074                 u32 vnic_char;
2075                 u32 timeout;
2076         } param;
2077         struct {
2078                 union{
2079                         u32 *sup_cmds;
2080                         u32 *timeout;
2081                 };
2082         } result;
2083 };
2084
2085 /* generic VNICC request call back */
2086 static int qeth_l2_vnicc_request_cb(struct qeth_card *card,
2087                                     struct qeth_reply *reply,
2088                                     unsigned long data)
2089 {
2090         struct _qeth_l2_vnicc_request_cbctl *cbctl =
2091                 (struct _qeth_l2_vnicc_request_cbctl *) reply->param;
2092         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2093         struct qeth_ipacmd_vnicc *rep = &cmd->data.vnicc;
2094
2095         QETH_CARD_TEXT(card, 2, "vniccrcb");
2096         if (cmd->hdr.return_code)
2097                 return 0;
2098         /* return results to caller */
2099         card->options.vnicc.sup_chars = rep->hdr.sup;
2100         card->options.vnicc.cur_chars = rep->hdr.cur;
2101
2102         if (cbctl->sub_cmd == IPA_VNICC_QUERY_CMDS)
2103                 *cbctl->result.sup_cmds = rep->query_cmds.sup_cmds;
2104
2105         if (cbctl->sub_cmd == IPA_VNICC_GET_TIMEOUT)
2106                 *cbctl->result.timeout = rep->getset_timeout.timeout;
2107
2108         return 0;
2109 }
2110
2111 /* generic VNICC request */
2112 static int qeth_l2_vnicc_request(struct qeth_card *card,
2113                                  struct _qeth_l2_vnicc_request_cbctl *cbctl)
2114 {
2115         struct qeth_ipacmd_vnicc *req;
2116         struct qeth_cmd_buffer *iob;
2117         struct qeth_ipa_cmd *cmd;
2118         int rc;
2119
2120         QETH_CARD_TEXT(card, 2, "vniccreq");
2121
2122         /* get new buffer for request */
2123         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_VNICC, 0);
2124         if (!iob)
2125                 return -ENOMEM;
2126
2127         /* create header for request */
2128         cmd = __ipa_cmd(iob);
2129         req = &cmd->data.vnicc;
2130
2131         /* create sub command header for request */
2132         req->sub_hdr.data_length = sizeof(req->sub_hdr);
2133         req->sub_hdr.sub_command = cbctl->sub_cmd;
2134
2135         /* create sub command specific request fields */
2136         switch (cbctl->sub_cmd) {
2137         case IPA_VNICC_QUERY_CHARS:
2138                 break;
2139         case IPA_VNICC_QUERY_CMDS:
2140                 req->sub_hdr.data_length += sizeof(req->query_cmds);
2141                 req->query_cmds.vnic_char = cbctl->param.vnic_char;
2142                 break;
2143         case IPA_VNICC_ENABLE:
2144         case IPA_VNICC_DISABLE:
2145                 req->sub_hdr.data_length += sizeof(req->set_char);
2146                 req->set_char.vnic_char = cbctl->param.vnic_char;
2147                 break;
2148         case IPA_VNICC_SET_TIMEOUT:
2149                 req->getset_timeout.timeout = cbctl->param.timeout;
2150                 /* fallthrough */
2151         case IPA_VNICC_GET_TIMEOUT:
2152                 req->sub_hdr.data_length += sizeof(req->getset_timeout);
2153                 req->getset_timeout.vnic_char = cbctl->param.vnic_char;
2154                 break;
2155         default:
2156                 qeth_release_buffer(iob->channel, iob);
2157                 return -EOPNOTSUPP;
2158         }
2159
2160         /* send request */
2161         rc = qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb,
2162                                (void *) cbctl);
2163
2164         return qeth_l2_vnicc_makerc(card, rc);
2165 }
2166
2167 /* VNICC query VNIC characteristics request */
2168 static int qeth_l2_vnicc_query_chars(struct qeth_card *card)
2169 {
2170         struct _qeth_l2_vnicc_request_cbctl cbctl;
2171
2172         /* prepare callback control */
2173         cbctl.sub_cmd = IPA_VNICC_QUERY_CHARS;
2174
2175         QETH_CARD_TEXT(card, 2, "vniccqch");
2176         return qeth_l2_vnicc_request(card, &cbctl);
2177 }
2178
2179 /* VNICC query sub commands request */
2180 static int qeth_l2_vnicc_query_cmds(struct qeth_card *card, u32 vnic_char,
2181                                     u32 *sup_cmds)
2182 {
2183         struct _qeth_l2_vnicc_request_cbctl cbctl;
2184
2185         /* prepare callback control */
2186         cbctl.sub_cmd = IPA_VNICC_QUERY_CMDS;
2187         cbctl.param.vnic_char = vnic_char;
2188         cbctl.result.sup_cmds = sup_cmds;
2189
2190         QETH_CARD_TEXT(card, 2, "vniccqcm");
2191         return qeth_l2_vnicc_request(card, &cbctl);
2192 }
2193
2194 /* VNICC enable/disable characteristic request */
2195 static int qeth_l2_vnicc_set_char(struct qeth_card *card, u32 vnic_char,
2196                                       u32 cmd)
2197 {
2198         struct _qeth_l2_vnicc_request_cbctl cbctl;
2199
2200         /* prepare callback control */
2201         cbctl.sub_cmd = cmd;
2202         cbctl.param.vnic_char = vnic_char;
2203
2204         QETH_CARD_TEXT(card, 2, "vniccedc");
2205         return qeth_l2_vnicc_request(card, &cbctl);
2206 }
2207
2208 /* VNICC get/set timeout for characteristic request */
2209 static int qeth_l2_vnicc_getset_timeout(struct qeth_card *card, u32 vnicc,
2210                                         u32 cmd, u32 *timeout)
2211 {
2212         struct _qeth_l2_vnicc_request_cbctl cbctl;
2213
2214         /* prepare callback control */
2215         cbctl.sub_cmd = cmd;
2216         cbctl.param.vnic_char = vnicc;
2217         if (cmd == IPA_VNICC_SET_TIMEOUT)
2218                 cbctl.param.timeout = *timeout;
2219         if (cmd == IPA_VNICC_GET_TIMEOUT)
2220                 cbctl.result.timeout = timeout;
2221
2222         QETH_CARD_TEXT(card, 2, "vniccgst");
2223         return qeth_l2_vnicc_request(card, &cbctl);
2224 }
2225
2226 /* set current VNICC flag state; called from sysfs store function */
2227 int qeth_l2_vnicc_set_state(struct qeth_card *card, u32 vnicc, bool state)
2228 {
2229         int rc = 0;
2230         u32 cmd;
2231
2232         QETH_CARD_TEXT(card, 2, "vniccsch");
2233
2234         /* do not change anything if BridgePort is enabled */
2235         if (qeth_bridgeport_is_in_use(card))
2236                 return -EBUSY;
2237
2238         /* check if characteristic and enable/disable are supported */
2239         if (!(card->options.vnicc.sup_chars & vnicc) ||
2240             !(card->options.vnicc.set_char_sup & vnicc))
2241                 return -EOPNOTSUPP;
2242
2243         /* set enable/disable command and store wanted characteristic */
2244         if (state) {
2245                 cmd = IPA_VNICC_ENABLE;
2246                 card->options.vnicc.wanted_chars |= vnicc;
2247         } else {
2248                 cmd = IPA_VNICC_DISABLE;
2249                 card->options.vnicc.wanted_chars &= ~vnicc;
2250         }
2251
2252         /* do we need to do anything? */
2253         if (card->options.vnicc.cur_chars == card->options.vnicc.wanted_chars)
2254                 return rc;
2255
2256         /* if card is not ready, simply stop here */
2257         if (!qeth_card_hw_is_reachable(card)) {
2258                 if (state)
2259                         card->options.vnicc.cur_chars |= vnicc;
2260                 else
2261                         card->options.vnicc.cur_chars &= ~vnicc;
2262                 return rc;
2263         }
2264
2265         rc = qeth_l2_vnicc_set_char(card, vnicc, cmd);
2266         if (rc)
2267                 card->options.vnicc.wanted_chars =
2268                         card->options.vnicc.cur_chars;
2269         else {
2270                 /* successful online VNICC change; handle special cases */
2271                 if (state && vnicc == QETH_VNICC_RX_BCAST)
2272                         card->options.vnicc.rx_bcast_enabled = true;
2273                 if (!state && vnicc == QETH_VNICC_LEARNING)
2274                         qeth_l2_vnicc_recover_timeout(card, vnicc,
2275                                         &card->options.vnicc.learning_timeout);
2276         }
2277
2278         return rc;
2279 }
2280
2281 /* get current VNICC flag state; called from sysfs show function */
2282 int qeth_l2_vnicc_get_state(struct qeth_card *card, u32 vnicc, bool *state)
2283 {
2284         int rc = 0;
2285
2286         QETH_CARD_TEXT(card, 2, "vniccgch");
2287
2288         /* do not get anything if BridgePort is enabled */
2289         if (qeth_bridgeport_is_in_use(card))
2290                 return -EBUSY;
2291
2292         /* check if characteristic is supported */
2293         if (!(card->options.vnicc.sup_chars & vnicc))
2294                 return -EOPNOTSUPP;
2295
2296         /* if card is ready, query current VNICC state */
2297         if (qeth_card_hw_is_reachable(card))
2298                 rc = qeth_l2_vnicc_query_chars(card);
2299
2300         *state = (card->options.vnicc.cur_chars & vnicc) ? true : false;
2301         return rc;
2302 }
2303
2304 /* set VNICC timeout; called from sysfs store function. Currently, only learning
2305  * supports timeout
2306  */
2307 int qeth_l2_vnicc_set_timeout(struct qeth_card *card, u32 timeout)
2308 {
2309         int rc = 0;
2310
2311         QETH_CARD_TEXT(card, 2, "vniccsto");
2312
2313         /* do not change anything if BridgePort is enabled */
2314         if (qeth_bridgeport_is_in_use(card))
2315                 return -EBUSY;
2316
2317         /* check if characteristic and set_timeout are supported */
2318         if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
2319             !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
2320                 return -EOPNOTSUPP;
2321
2322         /* do we need to do anything? */
2323         if (card->options.vnicc.learning_timeout == timeout)
2324                 return rc;
2325
2326         /* if card is not ready, simply store the value internally and return */
2327         if (!qeth_card_hw_is_reachable(card)) {
2328                 card->options.vnicc.learning_timeout = timeout;
2329                 return rc;
2330         }
2331
2332         /* send timeout value to card; if successful, store value internally */
2333         rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
2334                                           IPA_VNICC_SET_TIMEOUT, &timeout);
2335         if (!rc)
2336                 card->options.vnicc.learning_timeout = timeout;
2337
2338         return rc;
2339 }
2340
2341 /* get current VNICC timeout; called from sysfs show function. Currently, only
2342  * learning supports timeout
2343  */
2344 int qeth_l2_vnicc_get_timeout(struct qeth_card *card, u32 *timeout)
2345 {
2346         int rc = 0;
2347
2348         QETH_CARD_TEXT(card, 2, "vniccgto");
2349
2350         /* do not get anything if BridgePort is enabled */
2351         if (qeth_bridgeport_is_in_use(card))
2352                 return -EBUSY;
2353
2354         /* check if characteristic and get_timeout are supported */
2355         if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
2356             !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
2357                 return -EOPNOTSUPP;
2358         /* if card is ready, get timeout. Otherwise, just return stored value */
2359         *timeout = card->options.vnicc.learning_timeout;
2360         if (qeth_card_hw_is_reachable(card))
2361                 rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
2362                                                   IPA_VNICC_GET_TIMEOUT,
2363                                                   timeout);
2364
2365         return rc;
2366 }
2367
2368 /* check if VNICC is currently enabled */
2369 bool qeth_l2_vnicc_is_in_use(struct qeth_card *card)
2370 {
2371         /* if everything is turned off, VNICC is not active */
2372         if (!card->options.vnicc.cur_chars)
2373                 return false;
2374         /* default values are only OK if rx_bcast was not enabled by user
2375          * or the card is offline.
2376          */
2377         if (card->options.vnicc.cur_chars == QETH_VNICC_DEFAULT) {
2378                 if (!card->options.vnicc.rx_bcast_enabled ||
2379                     !qeth_card_hw_is_reachable(card))
2380                         return false;
2381         }
2382         return true;
2383 }
2384
2385 /* recover user timeout setting */
2386 static bool qeth_l2_vnicc_recover_timeout(struct qeth_card *card, u32 vnicc,
2387                                           u32 *timeout)
2388 {
2389         if (card->options.vnicc.sup_chars & vnicc &&
2390             card->options.vnicc.getset_timeout_sup & vnicc &&
2391             !qeth_l2_vnicc_getset_timeout(card, vnicc, IPA_VNICC_SET_TIMEOUT,
2392                                           timeout))
2393                 return false;
2394         *timeout = QETH_VNICC_DEFAULT_TIMEOUT;
2395         return true;
2396 }
2397
2398 /* recover user characteristic setting */
2399 static bool qeth_l2_vnicc_recover_char(struct qeth_card *card, u32 vnicc,
2400                                        bool enable)
2401 {
2402         u32 cmd = enable ? IPA_VNICC_ENABLE : IPA_VNICC_DISABLE;
2403
2404         if (card->options.vnicc.sup_chars & vnicc &&
2405             card->options.vnicc.set_char_sup & vnicc &&
2406             !qeth_l2_vnicc_set_char(card, vnicc, cmd))
2407                 return false;
2408         card->options.vnicc.wanted_chars &= ~vnicc;
2409         card->options.vnicc.wanted_chars |= QETH_VNICC_DEFAULT & vnicc;
2410         return true;
2411 }
2412
2413 /* (re-)initialize VNICC */
2414 static void qeth_l2_vnicc_init(struct qeth_card *card)
2415 {
2416         u32 *timeout = &card->options.vnicc.learning_timeout;
2417         unsigned int chars_len, i;
2418         unsigned long chars_tmp;
2419         u32 sup_cmds, vnicc;
2420         bool enable, error;
2421
2422         QETH_CARD_TEXT(card, 2, "vniccini");
2423         /* reset rx_bcast */
2424         card->options.vnicc.rx_bcast_enabled = 0;
2425         /* initial query and storage of VNIC characteristics */
2426         if (qeth_l2_vnicc_query_chars(card)) {
2427                 if (card->options.vnicc.wanted_chars != QETH_VNICC_DEFAULT ||
2428                     *timeout != QETH_VNICC_DEFAULT_TIMEOUT)
2429                         dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
2430                 /* fail quietly if user didn't change the default config */
2431                 card->options.vnicc.sup_chars = 0;
2432                 card->options.vnicc.cur_chars = 0;
2433                 card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
2434                 return;
2435         }
2436         /* get supported commands for each supported characteristic */
2437         chars_tmp = card->options.vnicc.sup_chars;
2438         chars_len = sizeof(card->options.vnicc.sup_chars) * BITS_PER_BYTE;
2439         for_each_set_bit(i, &chars_tmp, chars_len) {
2440                 vnicc = BIT(i);
2441                 qeth_l2_vnicc_query_cmds(card, vnicc, &sup_cmds);
2442                 if (!(sup_cmds & IPA_VNICC_SET_TIMEOUT) ||
2443                     !(sup_cmds & IPA_VNICC_GET_TIMEOUT))
2444                         card->options.vnicc.getset_timeout_sup &= ~vnicc;
2445                 if (!(sup_cmds & IPA_VNICC_ENABLE) ||
2446                     !(sup_cmds & IPA_VNICC_DISABLE))
2447                         card->options.vnicc.set_char_sup &= ~vnicc;
2448         }
2449         /* enforce assumed default values and recover settings, if changed  */
2450         error = qeth_l2_vnicc_recover_timeout(card, QETH_VNICC_LEARNING,
2451                                               timeout);
2452         chars_tmp = card->options.vnicc.wanted_chars ^ QETH_VNICC_DEFAULT;
2453         chars_tmp |= QETH_VNICC_BRIDGE_INVISIBLE;
2454         chars_len = sizeof(card->options.vnicc.wanted_chars) * BITS_PER_BYTE;
2455         for_each_set_bit(i, &chars_tmp, chars_len) {
2456                 vnicc = BIT(i);
2457                 enable = card->options.vnicc.wanted_chars & vnicc;
2458                 error |= qeth_l2_vnicc_recover_char(card, vnicc, enable);
2459         }
2460         if (error)
2461                 dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
2462 }
2463
2464 /* configure default values of VNIC characteristics */
2465 static void qeth_l2_vnicc_set_defaults(struct qeth_card *card)
2466 {
2467         /* characteristics values */
2468         card->options.vnicc.sup_chars = QETH_VNICC_ALL;
2469         card->options.vnicc.cur_chars = QETH_VNICC_DEFAULT;
2470         card->options.vnicc.learning_timeout = QETH_VNICC_DEFAULT_TIMEOUT;
2471         /* supported commands */
2472         card->options.vnicc.set_char_sup = QETH_VNICC_ALL;
2473         card->options.vnicc.getset_timeout_sup = QETH_VNICC_LEARNING;
2474         /* settings wanted by users */
2475         card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
2476 }
2477
2478 module_init(qeth_l2_init);
2479 module_exit(qeth_l2_exit);
2480 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
2481 MODULE_DESCRIPTION("qeth layer 2 discipline");
2482 MODULE_LICENSE("GPL");