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/ip.h>
  21 #include <linux/list.h>
  22 #include <linux/hash.h>
  23 #include <linux/hashtable.h>
  24 #include <linux/string.h>
  25 #include <asm/setup.h>
  26 #include "qeth_core.h"
  27 #include "qeth_l2.h"
  28
  29 static int qeth_l2_set_offline(struct ccwgroup_device *);
  30 static int qeth_l2_stop(struct net_device *);
  31 static void qeth_l2_set_rx_mode(struct net_device *);
  32 static void qeth_bridgeport_query_support(struct qeth_card *card);
  33 static void qeth_bridge_state_change(struct qeth_card *card,
  34                                         struct qeth_ipa_cmd *cmd);
  35 static void qeth_bridge_host_event(struct qeth_card *card,
  36                                         struct qeth_ipa_cmd *cmd);
  37 static void qeth_l2_vnicc_set_defaults(struct qeth_card *card);
  38 static void qeth_l2_vnicc_init(struct qeth_card *card);
  39 static bool qeth_l2_vnicc_recover_timeout(struct qeth_card *card, u32 vnicc,
  40                                           u32 *timeout);
  41
  42 static struct net_device *qeth_l2_netdev_by_devno(unsigned char *read_dev_no)
  43 {
  44         struct qeth_card *card;
  45         struct net_device *ndev;
  46         __u16 temp_dev_no;
  47         unsigned long flags;
  48         struct ccw_dev_id read_devid;
  49
  50         ndev = NULL;
  51         memcpy(&temp_dev_no, read_dev_no, 2);
  52         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
  53         list_for_each_entry(card, &qeth_core_card_list.list, list) {
  54                 ccw_device_get_id(CARD_RDEV(card), &read_devid);
  55                 if (read_devid.devno == temp_dev_no) {
  56                         ndev = card->dev;
  57                         break;
  58                 }
  59         }
  60         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
  61         return ndev;
  62 }
  63
  64 static int qeth_setdelmac_makerc(struct qeth_card *card, int retcode)
  65 {
  66         int rc;
  67
  68         if (retcode)
  69                 QETH_CARD_TEXT_(card, 2, "err%04x", retcode);
  70         switch (retcode) {
  71         case IPA_RC_SUCCESS:
  72                 rc = 0;
  73                 break;
  74         case IPA_RC_L2_UNSUPPORTED_CMD:
  75                 rc = -EOPNOTSUPP;
  76                 break;
  77         case IPA_RC_L2_ADDR_TABLE_FULL:
  78                 rc = -ENOSPC;
  79                 break;
  80         case IPA_RC_L2_DUP_MAC:
  81         case IPA_RC_L2_DUP_LAYER3_MAC:
  82                 rc = -EEXIST;
  83                 break;
  84         case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
  85         case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
  86                 rc = -EPERM;
  87                 break;
  88         case IPA_RC_L2_MAC_NOT_FOUND:
  89                 rc = -ENOENT;
  90                 break;
  91         case -ENOMEM:
  92                 rc = -ENOMEM;
  93                 break;
  94         default:
  95                 rc = -EIO;
  96                 break;
  97         }
  98         return rc;
  99 }
 100
 101 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
 102                            enum qeth_ipa_cmds ipacmd)
 103 {
 104         struct qeth_ipa_cmd *cmd;
 105         struct qeth_cmd_buffer *iob;
 106
 107         QETH_CARD_TEXT(card, 2, "L2sdmac");
 108         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 109         if (!iob)
 110                 return -ENOMEM;
 111         cmd = __ipa_cmd(iob);
 112         cmd->data.setdelmac.mac_length = ETH_ALEN;
 113         ether_addr_copy(cmd->data.setdelmac.mac, mac);
 114         return qeth_setdelmac_makerc(card, qeth_send_ipa_cmd(card, iob,
 115                                            NULL, NULL));
 116 }
 117
 118 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
 119 {
 120         int rc;
 121
 122         QETH_CARD_TEXT(card, 2, "L2Setmac");
 123         rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC);
 124         if (rc == 0) {
 125                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 126                 ether_addr_copy(card->dev->dev_addr, mac);
 127                 dev_info(&card->gdev->dev,
 128                         "MAC address %pM successfully registered on device %s\n",
 129                         card->dev->dev_addr, card->dev->name);
 130         } else {
 131                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 132                 switch (rc) {
 133                 case -EEXIST:
 134                         dev_warn(&card->gdev->dev,
 135                                 "MAC address %pM already exists\n", mac);
 136                         break;
 137                 case -EPERM:
 138                         dev_warn(&card->gdev->dev,
 139                                 "MAC address %pM is not authorized\n", mac);
 140                         break;
 141                 }
 142         }
 143         return rc;
 144 }
 145
 146 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
 147 {
 148         int rc;
 149
 150         QETH_CARD_TEXT(card, 2, "L2Delmac");
 151         if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
 152                 return 0;
 153         rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC);
 154         if (rc == 0)
 155                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 156         return rc;
 157 }
 158
 159 static int qeth_l2_write_mac(struct qeth_card *card, u8 *mac)
 160 {
 161         enum qeth_ipa_cmds cmd = is_multicast_ether_addr_64bits(mac) ?
 162                                         IPA_CMD_SETGMAC : IPA_CMD_SETVMAC;
 163         int rc;
 164
 165         QETH_CARD_TEXT(card, 2, "L2Wmac");
 166         rc = qeth_l2_send_setdelmac(card, mac, cmd);
 167         if (rc == -EEXIST)
 168                 QETH_DBF_MESSAGE(2, "MAC %pM already registered on %s\n",
 169                                  mac, QETH_CARD_IFNAME(card));
 170         else if (rc)
 171                 QETH_DBF_MESSAGE(2, "Failed to register MAC %pM on %s: %d\n",
 172                                  mac, QETH_CARD_IFNAME(card), rc);
 173         return rc;
 174 }
 175
 176 static int qeth_l2_remove_mac(struct qeth_card *card, u8 *mac)
 177 {
 178         enum qeth_ipa_cmds cmd = is_multicast_ether_addr_64bits(mac) ?
 179                                         IPA_CMD_DELGMAC : IPA_CMD_DELVMAC;
 180         int rc;
 181
 182         QETH_CARD_TEXT(card, 2, "L2Rmac");
 183         rc = qeth_l2_send_setdelmac(card, mac, cmd);
 184         if (rc)
 185                 QETH_DBF_MESSAGE(2, "Failed to delete MAC %pM on %s: %d\n",
 186                                  mac, QETH_CARD_IFNAME(card), rc);
 187         return rc;
 188 }
 189
 190 static void qeth_l2_del_all_macs(struct qeth_card *card)
 191 {
 192         struct qeth_mac *mac;
 193         struct hlist_node *tmp;
 194         int i;
 195
 196         spin_lock_bh(&card->mclock);
 197         hash_for_each_safe(card->mac_htable, i, tmp, mac, hnode) {
 198                 hash_del(&mac->hnode);
 199                 kfree(mac);
 200         }
 201         spin_unlock_bh(&card->mclock);
 202 }
 203
 204 static int qeth_l2_get_cast_type(struct qeth_card *card, struct sk_buff *skb)
 205 {
 206         if (card->info.type == QETH_CARD_TYPE_OSN)
 207                 return RTN_UNSPEC;
 208         if (is_broadcast_ether_addr(skb->data))
 209                 return RTN_BROADCAST;
 210         if (is_multicast_ether_addr(skb->data))
 211                 return RTN_MULTICAST;
 212         return RTN_UNSPEC;
 213 }
 214
 215 static void qeth_l2_hdr_csum(struct qeth_card *card, struct qeth_hdr *hdr,
 216                              struct sk_buff *skb)
 217 {
 218         struct iphdr *iph = ip_hdr(skb);
 219
 220         /* tcph->check contains already the pseudo hdr checksum
 221          * so just set the header flags
 222          */
 223         if (iph->protocol == IPPROTO_UDP)
 224                 hdr->hdr.l2.flags[1] |= QETH_HDR_EXT_UDP;
 225         hdr->hdr.l2.flags[1] |= QETH_HDR_EXT_CSUM_TRANSP_REQ |
 226                 QETH_HDR_EXT_CSUM_HDR_REQ;
 227         iph->check = 0;
 228         if (card->options.performance_stats)
 229                 card->perf_stats.tx_csum++;
 230 }
 231
 232 static void qeth_l2_fill_header(struct qeth_hdr *hdr, struct sk_buff *skb,
 233                                 int cast_type, unsigned int data_len)
 234 {
 235         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
 236
 237         memset(hdr, 0, sizeof(struct qeth_hdr));
 238         hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
 239         hdr->hdr.l2.pkt_length = data_len;
 240
 241         /* set byte byte 3 to casting flags */
 242         if (cast_type == RTN_MULTICAST)
 243                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 244         else if (cast_type == RTN_BROADCAST)
 245                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 246         else
 247                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 248
 249         /* VSWITCH relies on the VLAN
 250          * information to be present in
 251          * the QDIO header */
 252         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
 253                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
 254                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
 255         }
 256 }
 257
 258 static int qeth_setdelvlan_makerc(struct qeth_card *card, int retcode)
 259 {
 260         if (retcode)
 261                 QETH_CARD_TEXT_(card, 2, "err%04x", retcode);
 262
 263         switch (retcode) {
 264         case IPA_RC_SUCCESS:
 265                 return 0;
 266         case IPA_RC_L2_INVALID_VLAN_ID:
 267                 return -EINVAL;
 268         case IPA_RC_L2_DUP_VLAN_ID:
 269                 return -EEXIST;
 270         case IPA_RC_L2_VLAN_ID_NOT_FOUND:
 271                 return -ENOENT;
 272         case IPA_RC_L2_VLAN_ID_NOT_ALLOWED:
 273                 return -EPERM;
 274         case -ENOMEM:
 275                 return -ENOMEM;
 276         default:
 277                 return -EIO;
 278         }
 279 }
 280
 281 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
 282                                       struct qeth_reply *reply,
 283                                       unsigned long data)
 284 {
 285         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
 286
 287         QETH_CARD_TEXT(card, 2, "L2sdvcb");
 288         if (cmd->hdr.return_code) {
 289                 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x.\n",
 290                                  cmd->data.setdelvlan.vlan_id,
 291                                  QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 292                 QETH_CARD_TEXT_(card, 2, "L2VL%4x", cmd->hdr.command);
 293                 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code);
 294         }
 295         return 0;
 296 }
 297
 298 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
 299                                    enum qeth_ipa_cmds ipacmd)
 300 {
 301         struct qeth_ipa_cmd *cmd;
 302         struct qeth_cmd_buffer *iob;
 303
 304         QETH_CARD_TEXT_(card, 4, "L2sdv%x", ipacmd);
 305         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 306         if (!iob)
 307                 return -ENOMEM;
 308         cmd = __ipa_cmd(iob);
 309         cmd->data.setdelvlan.vlan_id = i;
 310         return qeth_setdelvlan_makerc(card, qeth_send_ipa_cmd(card, iob,
 311                                             qeth_l2_send_setdelvlan_cb, NULL));
 312 }
 313
 314 static void qeth_l2_process_vlans(struct qeth_card *card)
 315 {
 316         struct qeth_vlan_vid *id;
 317         QETH_CARD_TEXT(card, 3, "L2prcvln");
 318         spin_lock_bh(&card->vlanlock);
 319         list_for_each_entry(id, &card->vid_list, list) {
 320                 qeth_l2_send_setdelvlan(card, id->vid, IPA_CMD_SETVLAN);
 321         }
 322         spin_unlock_bh(&card->vlanlock);
 323 }
 324
 325 static int qeth_l2_vlan_rx_add_vid(struct net_device *dev,
 326                                    __be16 proto, u16 vid)
 327 {
 328         struct qeth_card *card = dev->ml_priv;
 329         struct qeth_vlan_vid *id;
 330         int rc;
 331
 332         QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
 333         if (!vid)
 334                 return 0;
 335         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 336                 QETH_CARD_TEXT(card, 3, "aidREC");
 337                 return 0;
 338         }
 339         id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
 340         if (id) {
 341                 id->vid = vid;
 342                 rc = qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
 343                 if (rc) {
 344                         kfree(id);
 345                         return rc;
 346                 }
 347                 spin_lock_bh(&card->vlanlock);
 348                 list_add_tail(&id->list, &card->vid_list);
 349                 spin_unlock_bh(&card->vlanlock);
 350         } else {
 351                 return -ENOMEM;
 352         }
 353         return 0;
 354 }
 355
 356 static int qeth_l2_vlan_rx_kill_vid(struct net_device *dev,
 357                                     __be16 proto, u16 vid)
 358 {
 359         struct qeth_vlan_vid *id, *tmpid = NULL;
 360         struct qeth_card *card = dev->ml_priv;
 361         int rc = 0;
 362
 363         QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
 364         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 365                 QETH_CARD_TEXT(card, 3, "kidREC");
 366                 return 0;
 367         }
 368         spin_lock_bh(&card->vlanlock);
 369         list_for_each_entry(id, &card->vid_list, list) {
 370                 if (id->vid == vid) {
 371                         list_del(&id->list);
 372                         tmpid = id;
 373                         break;
 374                 }
 375         }
 376         spin_unlock_bh(&card->vlanlock);
 377         if (tmpid) {
 378                 rc = qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 379                 kfree(tmpid);
 380         }
 381         qeth_l2_set_rx_mode(card->dev);
 382         return rc;
 383 }
 384
 385 static void qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
 386 {
 387         QETH_DBF_TEXT(SETUP , 2, "stopcard");
 388         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 389
 390         qeth_set_allowed_threads(card, 0, 1);
 391         if (card->read.state == CH_STATE_UP &&
 392             card->write.state == CH_STATE_UP &&
 393             (card->state == CARD_STATE_UP)) {
 394                 if (recovery_mode &&
 395                     card->info.type != QETH_CARD_TYPE_OSN) {
 396                         qeth_l2_stop(card->dev);
 397                 } else {
 398                         rtnl_lock();
 399                         dev_close(card->dev);
 400                         rtnl_unlock();
 401                 }
 402                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 403                 card->state = CARD_STATE_SOFTSETUP;
 404         }
 405         if (card->state == CARD_STATE_SOFTSETUP) {
 406                 qeth_l2_del_all_macs(card);
 407                 qeth_clear_ipacmd_list(card);
 408                 card->state = CARD_STATE_HARDSETUP;
 409         }
 410         if (card->state == CARD_STATE_HARDSETUP) {
 411                 qeth_qdio_clear_card(card, 0);
 412                 qeth_clear_qdio_buffers(card);
 413                 qeth_clear_working_pool_list(card);
 414                 card->state = CARD_STATE_DOWN;
 415         }
 416         if (card->state == CARD_STATE_DOWN) {
 417                 qeth_clear_cmd_buffers(&card->read);
 418                 qeth_clear_cmd_buffers(&card->write);
 419         }
 420 }
 421
 422 static int qeth_l2_process_inbound_buffer(struct qeth_card *card,
 423                                 int budget, int *done)
 424 {
 425         int work_done = 0;
 426         struct sk_buff *skb;
 427         struct qeth_hdr *hdr;
 428         unsigned int len;
 429
 430         *done = 0;
 431         WARN_ON_ONCE(!budget);
 432         while (budget) {
 433                 skb = qeth_core_get_next_skb(card,
 434                         &card->qdio.in_q->bufs[card->rx.b_index],
 435                         &card->rx.b_element, &card->rx.e_offset, &hdr);
 436                 if (!skb) {
 437                         *done = 1;
 438                         break;
 439                 }
 440                 switch (hdr->hdr.l2.id) {
 441                 case QETH_HEADER_TYPE_LAYER2:
 442                         skb->protocol = eth_type_trans(skb, skb->dev);
 443                         if ((card->dev->features & NETIF_F_RXCSUM)
 444                            && ((hdr->hdr.l2.flags[1] &
 445                                 (QETH_HDR_EXT_CSUM_HDR_REQ |
 446                                    QETH_HDR_EXT_CSUM_TRANSP_REQ)) ==
 447                                 (QETH_HDR_EXT_CSUM_HDR_REQ |
 448                                    QETH_HDR_EXT_CSUM_TRANSP_REQ)))
 449                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 450                         else
 451                                 skb->ip_summed = CHECKSUM_NONE;
 452                         if (skb->protocol == htons(ETH_P_802_2))
 453                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
 454                         len = skb->len;
 455                         napi_gro_receive(&card->napi, skb);
 456                         break;
 457                 case QETH_HEADER_TYPE_OSN:
 458                         if (card->info.type == QETH_CARD_TYPE_OSN) {
 459                                 skb_push(skb, sizeof(struct qeth_hdr));
 460                                 skb_copy_to_linear_data(skb, hdr,
 461                                                 sizeof(struct qeth_hdr));
 462                                 len = skb->len;
 463                                 card->osn_info.data_cb(skb);
 464                                 break;
 465                         }
 466                         /* else unknown */
 467                 default:
 468                         dev_kfree_skb_any(skb);
 469                         QETH_CARD_TEXT(card, 3, "inbunkno");
 470                         QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
 471                         continue;
 472                 }
 473                 work_done++;
 474                 budget--;
 475                 card->stats.rx_packets++;
 476                 card->stats.rx_bytes += len;
 477         }
 478         return work_done;
 479 }
 480
 481 static int qeth_l2_request_initial_mac(struct qeth_card *card)
 482 {
 483         int rc = 0;
 484         char vendor_pre[] = {0x02, 0x00, 0x00};
 485
 486         QETH_DBF_TEXT(SETUP, 2, "l2reqmac");
 487         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
 488
 489         if (MACHINE_IS_VM) {
 490                 rc = qeth_vm_request_mac(card);
 491                 if (!rc)
 492                         goto out;
 493                 QETH_DBF_MESSAGE(2, "z/VM MAC Service failed on device %s: x%x\n",
 494                                  CARD_BUS_ID(card), rc);
 495                 QETH_DBF_TEXT_(SETUP, 2, "err%04x", rc);
 496                 /* fall back to alternative mechanism: */
 497         }
 498
 499         if (card->info.type == QETH_CARD_TYPE_IQD ||
 500             card->info.type == QETH_CARD_TYPE_OSM ||
 501             card->info.type == QETH_CARD_TYPE_OSX ||
 502             card->info.guestlan) {
 503                 rc = qeth_setadpparms_change_macaddr(card);
 504                 if (rc) {
 505                         QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
 506                                 "device %s: x%x\n", CARD_BUS_ID(card), rc);
 507                         QETH_DBF_TEXT_(SETUP, 2, "1err%04x", rc);
 508                         return rc;
 509                 }
 510         } else {
 511                 eth_random_addr(card->dev->dev_addr);
 512                 memcpy(card->dev->dev_addr, vendor_pre, 3);
 513         }
 514 out:
 515         QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, card->dev->addr_len);
 516         return 0;
 517 }
 518
 519 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 520 {
 521         struct sockaddr *addr = p;
 522         struct qeth_card *card = dev->ml_priv;
 523         int rc = 0;
 524
 525         QETH_CARD_TEXT(card, 3, "setmac");
 526
 527         if (card->info.type == QETH_CARD_TYPE_OSN ||
 528             card->info.type == QETH_CARD_TYPE_OSM ||
 529             card->info.type == QETH_CARD_TYPE_OSX) {
 530                 QETH_CARD_TEXT(card, 3, "setmcTYP");
 531                 return -EOPNOTSUPP;
 532         }
 533         QETH_CARD_HEX(card, 3, addr->sa_data, ETH_ALEN);
 534         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 535                 QETH_CARD_TEXT(card, 3, "setmcREC");
 536                 return -ERESTARTSYS;
 537         }
 538         rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
 539         if (!rc || (rc == -ENOENT))
 540                 rc = qeth_l2_send_setmac(card, addr->sa_data);
 541         return rc ? -EINVAL : 0;
 542 }
 543
 544 static void qeth_promisc_to_bridge(struct qeth_card *card)
 545 {
 546         struct net_device *dev = card->dev;
 547         enum qeth_ipa_promisc_modes promisc_mode;
 548         int role;
 549         int rc;
 550
 551         QETH_CARD_TEXT(card, 3, "pmisc2br");
 552
 553         if (!card->options.sbp.reflect_promisc)
 554                 return;
 555         promisc_mode = (dev->flags & IFF_PROMISC) ? SET_PROMISC_MODE_ON
 556                                                 : SET_PROMISC_MODE_OFF;
 557         if (promisc_mode == card->info.promisc_mode)
 558                 return;
 559
 560         if (promisc_mode == SET_PROMISC_MODE_ON) {
 561                 if (card->options.sbp.reflect_promisc_primary)
 562                         role = QETH_SBP_ROLE_PRIMARY;
 563                 else
 564                         role = QETH_SBP_ROLE_SECONDARY;
 565         } else
 566                 role = QETH_SBP_ROLE_NONE;
 567
 568         rc = qeth_bridgeport_setrole(card, role);
 569         QETH_DBF_TEXT_(SETUP, 2, "bpm%c%04x",
 570                         (promisc_mode == SET_PROMISC_MODE_ON) ? '+' : '-', rc);
 571         if (!rc) {
 572                 card->options.sbp.role = role;
 573                 card->info.promisc_mode = promisc_mode;
 574         }
 575
 576 }
 577 /* New MAC address is added to the hash table and marked to be written on card
 578  * only if there is not in the hash table storage already
 579  *
 580 */
 581 static void qeth_l2_add_mac(struct qeth_card *card, struct netdev_hw_addr *ha)
 582 {
 583         u32 mac_hash = get_unaligned((u32 *)(&ha->addr[2]));
 584         struct qeth_mac *mac;
 585
 586         hash_for_each_possible(card->mac_htable, mac, hnode, mac_hash) {
 587                 if (ether_addr_equal_64bits(ha->addr, mac->mac_addr)) {
 588                         mac->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
 589                         return;
 590                 }
 591         }
 592
 593         mac = kzalloc(sizeof(struct qeth_mac), GFP_ATOMIC);
 594         if (!mac)
 595                 return;
 596
 597         ether_addr_copy(mac->mac_addr, ha->addr);
 598         mac->disp_flag = QETH_DISP_ADDR_ADD;
 599
 600         hash_add(card->mac_htable, &mac->hnode, mac_hash);
 601 }
 602
 603 static void qeth_l2_set_rx_mode(struct net_device *dev)
 604 {
 605         struct qeth_card *card = dev->ml_priv;
 606         struct netdev_hw_addr *ha;
 607         struct qeth_mac *mac;
 608         struct hlist_node *tmp;
 609         int i;
 610         int rc;
 611
 612         if (card->info.type == QETH_CARD_TYPE_OSN)
 613                 return;
 614
 615         QETH_CARD_TEXT(card, 3, "setmulti");
 616         if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
 617             (card->state != CARD_STATE_UP))
 618                 return;
 619
 620         spin_lock_bh(&card->mclock);
 621
 622         netdev_for_each_mc_addr(ha, dev)
 623                 qeth_l2_add_mac(card, ha);
 624         netdev_for_each_uc_addr(ha, dev)
 625                 qeth_l2_add_mac(card, ha);
 626
 627         hash_for_each_safe(card->mac_htable, i, tmp, mac, hnode) {
 628                 switch (mac->disp_flag) {
 629                 case QETH_DISP_ADDR_DELETE:
 630                         qeth_l2_remove_mac(card, mac->mac_addr);
 631                         hash_del(&mac->hnode);
 632                         kfree(mac);
 633                         break;
 634                 case QETH_DISP_ADDR_ADD:
 635                         rc = qeth_l2_write_mac(card, mac->mac_addr);
 636                         if (rc) {
 637                                 hash_del(&mac->hnode);
 638                                 kfree(mac);
 639                                 break;
 640                         }
 641                         /* fall through */
 642                 default:
 643                         /* for next call to set_rx_mode(): */
 644                         mac->disp_flag = QETH_DISP_ADDR_DELETE;
 645                 }
 646         }
 647
 648         spin_unlock_bh(&card->mclock);
 649
 650         if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
 651                 qeth_setadp_promisc_mode(card);
 652         else
 653                 qeth_promisc_to_bridge(card);
 654 }
 655
 656 static int qeth_l2_xmit_iqd(struct qeth_card *card, struct sk_buff *skb,
 657                             struct qeth_qdio_out_q *queue, int cast_type)
 658 {
 659         unsigned int data_offset = ETH_HLEN;
 660         struct qeth_hdr *hdr;
 661         int rc;
 662
 663         hdr = kmem_cache_alloc(qeth_core_header_cache, GFP_ATOMIC);
 664         if (!hdr)
 665                 return -ENOMEM;
 666         qeth_l2_fill_header(hdr, skb, cast_type, skb->len);
 667         skb_copy_from_linear_data(skb, ((char *)hdr) + sizeof(*hdr),
 668                                   data_offset);
 669
 670         if (!qeth_get_elements_no(card, skb, 1, data_offset)) {
 671                 rc = -E2BIG;
 672                 goto out;
 673         }
 674         rc = qeth_do_send_packet_fast(queue, skb, hdr, data_offset,
 675                                       sizeof(*hdr) + data_offset);
 676 out:
 677         if (rc)
 678                 kmem_cache_free(qeth_core_header_cache, hdr);
 679         return rc;
 680 }
 681
 682 static int qeth_l2_xmit_osa(struct qeth_card *card, struct sk_buff *skb,
 683                             struct qeth_qdio_out_q *queue, int cast_type)
 684 {
 685         int push_len = sizeof(struct qeth_hdr);
 686         unsigned int elements, nr_frags;
 687         unsigned int hdr_elements = 0;
 688         struct qeth_hdr *hdr = NULL;
 689         unsigned int hd_len = 0;
 690         int rc;
 691
 692         /* fix hardware limitation: as long as we do not have sbal
 693          * chaining we can not send long frag lists
 694          */
 695         if (!qeth_get_elements_no(card, skb, 0, 0)) {
 696                 rc = skb_linearize(skb);
 697
 698                 if (card->options.performance_stats) {
 699                         if (rc)
 700                                 card->perf_stats.tx_linfail++;
 701                         else
 702                                 card->perf_stats.tx_lin++;
 703                 }
 704                 if (rc)
 705                         return rc;
 706         }
 707         nr_frags = skb_shinfo(skb)->nr_frags;
 708
 709         rc = skb_cow_head(skb, push_len);
 710         if (rc)
 711                 return rc;
 712         push_len = qeth_push_hdr(skb, &hdr, push_len);
 713         if (push_len < 0)
 714                 return push_len;
 715         if (!push_len) {
 716                 /* hdr was allocated from cache */
 717                 hd_len = sizeof(*hdr);
 718                 hdr_elements = 1;
 719         }
 720         qeth_l2_fill_header(hdr, skb, cast_type, skb->len - push_len);
 721         if (skb->ip_summed == CHECKSUM_PARTIAL)
 722                 qeth_l2_hdr_csum(card, hdr, skb);
 723
 724         elements = qeth_get_elements_no(card, skb, hdr_elements, 0);
 725         if (!elements) {
 726                 rc = -E2BIG;
 727                 goto out;
 728         }
 729         elements += hdr_elements;
 730
 731         /* TODO: remove the skb_orphan() once TX completion is fast enough */
 732         skb_orphan(skb);
 733         rc = qeth_do_send_packet(card, queue, skb, hdr, 0, hd_len, elements);
 734 out:
 735         if (!rc) {
 736                 if (card->options.performance_stats && nr_frags) {
 737                         card->perf_stats.sg_skbs_sent++;
 738                         /* nr_frags + skb->data */
 739                         card->perf_stats.sg_frags_sent += nr_frags + 1;
 740                 }
 741         } else {
 742                 if (hd_len)
 743                         kmem_cache_free(qeth_core_header_cache, hdr);
 744                 if (rc == -EBUSY)
 745                         /* roll back to ETH header */
 746                         skb_pull(skb, push_len);
 747         }
 748         return rc;
 749 }
 750
 751 static int qeth_l2_xmit_osn(struct qeth_card *card, struct sk_buff *skb,
 752                             struct qeth_qdio_out_q *queue)
 753 {
 754         unsigned int elements;
 755         struct qeth_hdr *hdr;
 756
 757         if (skb->protocol == htons(ETH_P_IPV6))
 758                 return -EPROTONOSUPPORT;
 759
 760         hdr = (struct qeth_hdr *)skb->data;
 761         elements = qeth_get_elements_no(card, skb, 0, 0);
 762         if (!elements)
 763                 return -E2BIG;
 764         if (qeth_hdr_chk_and_bounce(skb, &hdr, sizeof(*hdr)))
 765                 return -EINVAL;
 766         return qeth_do_send_packet(card, queue, skb, hdr, 0, 0, elements);
 767 }
 768
 769 static netdev_tx_t qeth_l2_hard_start_xmit(struct sk_buff *skb,
 770                                            struct net_device *dev)
 771 {
 772         struct qeth_card *card = dev->ml_priv;
 773         int cast_type = qeth_l2_get_cast_type(card, skb);
 774         struct qeth_qdio_out_q *queue;
 775         int tx_bytes = skb->len;
 776         int rc;
 777
 778         if (card->qdio.do_prio_queueing || (cast_type &&
 779                                         card->info.is_multicast_different))
 780                 queue = card->qdio.out_qs[qeth_get_priority_queue(card, skb,
 781                                         qeth_get_ip_version(skb), cast_type)];
 782         else
 783                 queue = card->qdio.out_qs[card->qdio.default_out_queue];
 784
 785         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
 786                 card->stats.tx_carrier_errors++;
 787                 goto tx_drop;
 788         }
 789
 790         if (card->options.performance_stats) {
 791                 card->perf_stats.outbound_cnt++;
 792                 card->perf_stats.outbound_start_time = qeth_get_micros();
 793         }
 794         netif_stop_queue(dev);
 795
 796         switch (card->info.type) {
 797         case QETH_CARD_TYPE_OSN:
 798                 rc = qeth_l2_xmit_osn(card, skb, queue);
 799                 break;
 800         case QETH_CARD_TYPE_IQD:
 801                 rc = qeth_l2_xmit_iqd(card, skb, queue, cast_type);
 802                 break;
 803         default:
 804                 rc = qeth_l2_xmit_osa(card, skb, queue, cast_type);
 805         }
 806
 807         if (!rc) {
 808                 card->stats.tx_packets++;
 809                 card->stats.tx_bytes += tx_bytes;
 810                 if (card->options.performance_stats)
 811                         card->perf_stats.outbound_time += qeth_get_micros() -
 812                                 card->perf_stats.outbound_start_time;
 813                 netif_wake_queue(dev);
 814                 return NETDEV_TX_OK;
 815         } else if (rc == -EBUSY) {
 816                 return NETDEV_TX_BUSY;
 817         } /* else fall through */
 818
 819 tx_drop:
 820         card->stats.tx_dropped++;
 821         card->stats.tx_errors++;
 822         dev_kfree_skb_any(skb);
 823         netif_wake_queue(dev);
 824         return NETDEV_TX_OK;
 825 }
 826
 827 static int __qeth_l2_open(struct net_device *dev)
 828 {
 829         struct qeth_card *card = dev->ml_priv;
 830         int rc = 0;
 831
 832         QETH_CARD_TEXT(card, 4, "qethopen");
 833         if (card->state == CARD_STATE_UP)
 834                 return rc;
 835         if (card->state != CARD_STATE_SOFTSETUP)
 836                 return -ENODEV;
 837
 838         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
 839              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
 840                 QETH_CARD_TEXT(card, 4, "nomacadr");
 841                 return -EPERM;
 842         }
 843         card->data.state = CH_STATE_UP;
 844         card->state = CARD_STATE_UP;
 845         netif_start_queue(dev);
 846
 847         if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) {
 848                 napi_enable(&card->napi);
 849                 napi_schedule(&card->napi);
 850         } else
 851                 rc = -EIO;
 852         return rc;
 853 }
 854
 855 static int qeth_l2_open(struct net_device *dev)
 856 {
 857         struct qeth_card *card = dev->ml_priv;
 858
 859         QETH_CARD_TEXT(card, 5, "qethope_");
 860         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 861                 QETH_CARD_TEXT(card, 3, "openREC");
 862                 return -ERESTARTSYS;
 863         }
 864         return __qeth_l2_open(dev);
 865 }
 866
 867 static int qeth_l2_stop(struct net_device *dev)
 868 {
 869         struct qeth_card *card = dev->ml_priv;
 870
 871         QETH_CARD_TEXT(card, 4, "qethstop");
 872         netif_tx_disable(dev);
 873         if (card->state == CARD_STATE_UP) {
 874                 card->state = CARD_STATE_SOFTSETUP;
 875                 napi_disable(&card->napi);
 876         }
 877         return 0;
 878 }
 879
 880 static const struct device_type qeth_l2_devtype = {
 881         .name = "qeth_layer2",
 882         .groups = qeth_l2_attr_groups,
 883 };
 884
 885 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 886 {
 887         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 888         int rc;
 889
 890         if (gdev->dev.type == &qeth_generic_devtype) {
 891                 rc = qeth_l2_create_device_attributes(&gdev->dev);
 892                 if (rc)
 893                         return rc;
 894         }
 895         INIT_LIST_HEAD(&card->vid_list);
 896         hash_init(card->mac_htable);
 897         card->options.layer2 = 1;
 898         card->info.hwtrap = 0;
 899         qeth_l2_vnicc_set_defaults(card);
 900         return 0;
 901 }
 902
 903 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
 904 {
 905         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
 906
 907         if (cgdev->dev.type == &qeth_generic_devtype)
 908                 qeth_l2_remove_device_attributes(&cgdev->dev);
 909         qeth_set_allowed_threads(card, 0, 1);
 910         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 911
 912         if (cgdev->state == CCWGROUP_ONLINE)
 913                 qeth_l2_set_offline(cgdev);
 914
 915         if (card->dev) {
 916                 unregister_netdev(card->dev);
 917                 free_netdev(card->dev);
 918                 card->dev = NULL;
 919         }
 920         return;
 921 }
 922
 923 static const struct ethtool_ops qeth_l2_ethtool_ops = {
 924         .get_link = ethtool_op_get_link,
 925         .get_strings = qeth_core_get_strings,
 926         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 927         .get_sset_count = qeth_core_get_sset_count,
 928         .get_drvinfo = qeth_core_get_drvinfo,
 929         .get_link_ksettings = qeth_core_ethtool_get_link_ksettings,
 930 };
 931
 932 static const struct ethtool_ops qeth_l2_osn_ops = {
 933         .get_strings = qeth_core_get_strings,
 934         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 935         .get_sset_count = qeth_core_get_sset_count,
 936         .get_drvinfo = qeth_core_get_drvinfo,
 937 };
 938
 939 static const struct net_device_ops qeth_l2_netdev_ops = {
 940         .ndo_open               = qeth_l2_open,
 941         .ndo_stop               = qeth_l2_stop,
 942         .ndo_get_stats          = qeth_get_stats,
 943         .ndo_start_xmit         = qeth_l2_hard_start_xmit,
 944         .ndo_features_check     = qeth_features_check,
 945         .ndo_validate_addr      = eth_validate_addr,
 946         .ndo_set_rx_mode        = qeth_l2_set_rx_mode,
 947         .ndo_do_ioctl           = qeth_do_ioctl,
 948         .ndo_set_mac_address    = qeth_l2_set_mac_address,
 949         .ndo_change_mtu         = qeth_change_mtu,
 950         .ndo_vlan_rx_add_vid    = qeth_l2_vlan_rx_add_vid,
 951         .ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,
 952         .ndo_tx_timeout         = qeth_tx_timeout,
 953         .ndo_fix_features       = qeth_fix_features,
 954         .ndo_set_features       = qeth_set_features
 955 };
 956
 957 static int qeth_l2_setup_netdev(struct qeth_card *card)
 958 {
 959         switch (card->info.type) {
 960         case QETH_CARD_TYPE_IQD:
 961                 card->dev = alloc_netdev(0, "hsi%d", NET_NAME_UNKNOWN,
 962                                          ether_setup);
 963                 break;
 964         case QETH_CARD_TYPE_OSN:
 965                 card->dev = alloc_netdev(0, "osn%d", NET_NAME_UNKNOWN,
 966                                          ether_setup);
 967                 break;
 968         default:
 969                 card->dev = alloc_etherdev(0);
 970         }
 971
 972         if (!card->dev)
 973                 return -ENODEV;
 974
 975         card->dev->ml_priv = card;
 976         card->dev->priv_flags |= IFF_UNICAST_FLT;
 977         card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
 978         card->dev->mtu = card->info.initial_mtu;
 979         card->dev->min_mtu = 64;
 980         card->dev->max_mtu = ETH_MAX_MTU;
 981         card->dev->netdev_ops = &qeth_l2_netdev_ops;
 982         if (card->info.type == QETH_CARD_TYPE_OSN) {
 983                 card->dev->ethtool_ops = &qeth_l2_osn_ops;
 984                 card->dev->flags |= IFF_NOARP;
 985         } else {
 986                 card->dev->ethtool_ops = &qeth_l2_ethtool_ops;
 987         }
 988
 989         if (card->info.type == QETH_CARD_TYPE_OSM)
 990                 card->dev->features |= NETIF_F_VLAN_CHALLENGED;
 991         else
 992                 card->dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
 993
 994         if (card->info.type != QETH_CARD_TYPE_OSN &&
 995             card->info.type != QETH_CARD_TYPE_IQD) {
 996                 card->dev->priv_flags &= ~IFF_TX_SKB_SHARING;
 997                 card->dev->needed_headroom = sizeof(struct qeth_hdr);
 998                 card->dev->hw_features |= NETIF_F_SG;
 999                 card->dev->vlan_features |= NETIF_F_SG;
1000         }
1001
1002         if (card->info.type == QETH_CARD_TYPE_OSD && !card->info.guestlan) {
1003                 card->dev->features |= NETIF_F_SG;
1004                 /* OSA 3S and earlier has no RX/TX support */
1005                 if (qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM)) {
1006                         card->dev->hw_features |= NETIF_F_IP_CSUM;
1007                         card->dev->vlan_features |= NETIF_F_IP_CSUM;
1008                 }
1009                 if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM)) {
1010                         card->dev->hw_features |= NETIF_F_RXCSUM;
1011                         card->dev->vlan_features |= NETIF_F_RXCSUM;
1012                 }
1013         }
1014
1015         card->info.broadcast_capable = 1;
1016         qeth_l2_request_initial_mac(card);
1017         SET_NETDEV_DEV(card->dev, &card->gdev->dev);
1018         netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT);
1019         netif_carrier_off(card->dev);
1020         return register_netdev(card->dev);
1021 }
1022
1023 static int qeth_l2_start_ipassists(struct qeth_card *card)
1024 {
1025         /* configure isolation level */
1026         if (qeth_set_access_ctrl_online(card, 0))
1027                 return -ENODEV;
1028         return 0;
1029 }
1030
1031 static void qeth_l2_trace_features(struct qeth_card *card)
1032 {
1033         /* Set BridgePort features */
1034         QETH_CARD_TEXT(card, 2, "featuSBP");
1035         QETH_CARD_HEX(card, 2, &card->options.sbp.supported_funcs,
1036                       sizeof(card->options.sbp.supported_funcs));
1037         /* VNIC Characteristics features */
1038         QETH_CARD_TEXT(card, 2, "feaVNICC");
1039         QETH_CARD_HEX(card, 2, &card->options.vnicc.sup_chars,
1040                       sizeof(card->options.vnicc.sup_chars));
1041 }
1042
1043 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
1044 {
1045         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1046         int rc = 0;
1047         enum qeth_card_states recover_flag;
1048
1049         mutex_lock(&card->discipline_mutex);
1050         mutex_lock(&card->conf_mutex);
1051         QETH_DBF_TEXT(SETUP, 2, "setonlin");
1052         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1053
1054         recover_flag = card->state;
1055         rc = qeth_core_hardsetup_card(card);
1056         if (rc) {
1057                 QETH_DBF_TEXT_(SETUP, 2, "2err%04x", rc);
1058                 rc = -ENODEV;
1059                 goto out_remove;
1060         }
1061         qeth_bridgeport_query_support(card);
1062         if (card->options.sbp.supported_funcs)
1063                 dev_info(&card->gdev->dev,
1064                 "The device represents a Bridge Capable Port\n");
1065
1066         if (!card->dev && qeth_l2_setup_netdev(card)) {
1067                 rc = -ENODEV;
1068                 goto out_remove;
1069         }
1070
1071         if (card->info.type != QETH_CARD_TYPE_OSN)
1072                 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
1073
1074         if (qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP)) {
1075                 if (card->info.hwtrap &&
1076                     qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM))
1077                         card->info.hwtrap = 0;
1078         } else
1079                 card->info.hwtrap = 0;
1080
1081         /* for the rx_bcast characteristic, init VNICC after setmac */
1082         qeth_l2_vnicc_init(card);
1083
1084         qeth_trace_features(card);
1085         qeth_l2_trace_features(card);
1086
1087         qeth_l2_setup_bridgeport_attrs(card);
1088
1089         card->state = CARD_STATE_HARDSETUP;
1090         qeth_print_status_message(card);
1091
1092         /* softsetup */
1093         QETH_DBF_TEXT(SETUP, 2, "softsetp");
1094
1095         if ((card->info.type == QETH_CARD_TYPE_OSD) ||
1096             (card->info.type == QETH_CARD_TYPE_OSX)) {
1097                 rc = qeth_l2_start_ipassists(card);
1098                 if (rc)
1099                         goto out_remove;
1100         }
1101
1102         if (card->info.type != QETH_CARD_TYPE_OSN)
1103                 qeth_l2_process_vlans(card);
1104
1105         netif_tx_disable(card->dev);
1106
1107         rc = qeth_init_qdio_queues(card);
1108         if (rc) {
1109                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1110                 rc = -ENODEV;
1111                 goto out_remove;
1112         }
1113         card->state = CARD_STATE_SOFTSETUP;
1114         if (card->lan_online)
1115                 netif_carrier_on(card->dev);
1116         else
1117                 netif_carrier_off(card->dev);
1118
1119         qeth_set_allowed_threads(card, 0xffffffff, 0);
1120         if (recover_flag == CARD_STATE_RECOVER) {
1121                 if (recovery_mode &&
1122                     card->info.type != QETH_CARD_TYPE_OSN) {
1123                         __qeth_l2_open(card->dev);
1124                 } else {
1125                         rtnl_lock();
1126                         dev_open(card->dev);
1127                         rtnl_unlock();
1128                 }
1129                 /* this also sets saved unicast addresses */
1130                 qeth_l2_set_rx_mode(card->dev);
1131                 rtnl_lock();
1132                 qeth_recover_features(card->dev);
1133                 rtnl_unlock();
1134         }
1135         /* let user_space know that device is online */
1136         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1137         mutex_unlock(&card->conf_mutex);
1138         mutex_unlock(&card->discipline_mutex);
1139         return 0;
1140
1141 out_remove:
1142         qeth_l2_stop_card(card, 0);
1143         ccw_device_set_offline(CARD_DDEV(card));
1144         ccw_device_set_offline(CARD_WDEV(card));
1145         ccw_device_set_offline(CARD_RDEV(card));
1146         qdio_free(CARD_DDEV(card));
1147         if (recover_flag == CARD_STATE_RECOVER)
1148                 card->state = CARD_STATE_RECOVER;
1149         else
1150                 card->state = CARD_STATE_DOWN;
1151         mutex_unlock(&card->conf_mutex);
1152         mutex_unlock(&card->discipline_mutex);
1153         return rc;
1154 }
1155
1156 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1157 {
1158         return __qeth_l2_set_online(gdev, 0);
1159 }
1160
1161 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1162                                         int recovery_mode)
1163 {
1164         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1165         int rc = 0, rc2 = 0, rc3 = 0;
1166         enum qeth_card_states recover_flag;
1167
1168         mutex_lock(&card->discipline_mutex);
1169         mutex_lock(&card->conf_mutex);
1170         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1171         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1172
1173         if (card->dev && netif_carrier_ok(card->dev))
1174                 netif_carrier_off(card->dev);
1175         recover_flag = card->state;
1176         if ((!recovery_mode && card->info.hwtrap) || card->info.hwtrap == 2) {
1177                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1178                 card->info.hwtrap = 1;
1179         }
1180         qeth_l2_stop_card(card, recovery_mode);
1181         rc  = ccw_device_set_offline(CARD_DDEV(card));
1182         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1183         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1184         if (!rc)
1185                 rc = (rc2) ? rc2 : rc3;
1186         if (rc)
1187                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1188         qdio_free(CARD_DDEV(card));
1189         if (recover_flag == CARD_STATE_UP)
1190                 card->state = CARD_STATE_RECOVER;
1191         /* let user_space know that device is offline */
1192         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1193         mutex_unlock(&card->conf_mutex);
1194         mutex_unlock(&card->discipline_mutex);
1195         return 0;
1196 }
1197
1198 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1199 {
1200         return __qeth_l2_set_offline(cgdev, 0);
1201 }
1202
1203 static int qeth_l2_recover(void *ptr)
1204 {
1205         struct qeth_card *card;
1206         int rc = 0;
1207
1208         card = (struct qeth_card *) ptr;
1209         QETH_CARD_TEXT(card, 2, "recover1");
1210         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1211                 return 0;
1212         QETH_CARD_TEXT(card, 2, "recover2");
1213         dev_warn(&card->gdev->dev,
1214                 "A recovery process has been started for the device\n");
1215         qeth_set_recovery_task(card);
1216         __qeth_l2_set_offline(card->gdev, 1);
1217         rc = __qeth_l2_set_online(card->gdev, 1);
1218         if (!rc)
1219                 dev_info(&card->gdev->dev,
1220                         "Device successfully recovered!\n");
1221         else {
1222                 qeth_close_dev(card);
1223                 dev_warn(&card->gdev->dev, "The qeth device driver "
1224                                 "failed to recover an error on the device\n");
1225         }
1226         qeth_clear_recovery_task(card);
1227         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1228         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1229         return 0;
1230 }
1231
1232 static int __init qeth_l2_init(void)
1233 {
1234         pr_info("register layer 2 discipline\n");
1235         return 0;
1236 }
1237
1238 static void __exit qeth_l2_exit(void)
1239 {
1240         pr_info("unregister layer 2 discipline\n");
1241 }
1242
1243 static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev)
1244 {
1245         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1246
1247         if (card->dev)
1248                 netif_device_detach(card->dev);
1249         qeth_set_allowed_threads(card, 0, 1);
1250         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1251         if (gdev->state == CCWGROUP_OFFLINE)
1252                 return 0;
1253         if (card->state == CARD_STATE_UP) {
1254                 if (card->info.hwtrap)
1255                         qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1256                 __qeth_l2_set_offline(card->gdev, 1);
1257         } else
1258                 __qeth_l2_set_offline(card->gdev, 0);
1259         return 0;
1260 }
1261
1262 static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
1263 {
1264         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1265         int rc = 0;
1266
1267         if (gdev->state == CCWGROUP_OFFLINE)
1268                 goto out;
1269
1270         if (card->state == CARD_STATE_RECOVER) {
1271                 rc = __qeth_l2_set_online(card->gdev, 1);
1272                 if (rc) {
1273                         rtnl_lock();
1274                         dev_close(card->dev);
1275                         rtnl_unlock();
1276                 }
1277         } else
1278                 rc = __qeth_l2_set_online(card->gdev, 0);
1279 out:
1280         qeth_set_allowed_threads(card, 0xffffffff, 0);
1281         if (card->dev)
1282                 netif_device_attach(card->dev);
1283         if (rc)
1284                 dev_warn(&card->gdev->dev, "The qeth device driver "
1285                         "failed to recover an error on the device\n");
1286         return rc;
1287 }
1288
1289 /* Returns zero if the command is successfully "consumed" */
1290 static int qeth_l2_control_event(struct qeth_card *card,
1291                                         struct qeth_ipa_cmd *cmd)
1292 {
1293         switch (cmd->hdr.command) {
1294         case IPA_CMD_SETBRIDGEPORT_OSA:
1295         case IPA_CMD_SETBRIDGEPORT_IQD:
1296                 if (cmd->data.sbp.hdr.command_code ==
1297                                 IPA_SBP_BRIDGE_PORT_STATE_CHANGE) {
1298                         qeth_bridge_state_change(card, cmd);
1299                         return 0;
1300                 } else
1301                         return 1;
1302         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
1303                 qeth_bridge_host_event(card, cmd);
1304                 return 0;
1305         default:
1306                 return 1;
1307         }
1308 }
1309
1310 struct qeth_discipline qeth_l2_discipline = {
1311         .devtype = &qeth_l2_devtype,
1312         .start_poll = qeth_qdio_start_poll,
1313         .input_handler = (qdio_handler_t *) qeth_qdio_input_handler,
1314         .output_handler = (qdio_handler_t *) qeth_qdio_output_handler,
1315         .process_rx_buffer = qeth_l2_process_inbound_buffer,
1316         .recover = qeth_l2_recover,
1317         .setup = qeth_l2_probe_device,
1318         .remove = qeth_l2_remove_device,
1319         .set_online = qeth_l2_set_online,
1320         .set_offline = qeth_l2_set_offline,
1321         .freeze = qeth_l2_pm_suspend,
1322         .thaw = qeth_l2_pm_resume,
1323         .restore = qeth_l2_pm_resume,
1324         .do_ioctl = NULL,
1325         .control_event_handler = qeth_l2_control_event,
1326 };
1327 EXPORT_SYMBOL_GPL(qeth_l2_discipline);
1328
1329 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1330                            struct qeth_cmd_buffer *iob)
1331 {
1332         unsigned long flags;
1333         int rc = 0;
1334
1335         QETH_CARD_TEXT(card, 5, "osndctrd");
1336
1337         wait_event(card->wait_q,
1338                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1339         qeth_prepare_control_data(card, len, iob);
1340         QETH_CARD_TEXT(card, 6, "osnoirqp");
1341         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1342         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1343                               (addr_t) iob, 0, 0);
1344         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1345         if (rc) {
1346                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1347                            "ccw_device_start rc = %i\n", rc);
1348                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1349                 qeth_release_buffer(iob->channel, iob);
1350                 atomic_set(&card->write.irq_pending, 0);
1351                 wake_up(&card->wait_q);
1352         }
1353         return rc;
1354 }
1355
1356 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1357                         struct qeth_cmd_buffer *iob, int data_len)
1358 {
1359         u16 s1, s2;
1360
1361         QETH_CARD_TEXT(card, 4, "osndipa");
1362
1363         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1364         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1365         s2 = (u16)data_len;
1366         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1367         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1368         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1369         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1370         return qeth_osn_send_control_data(card, s1, iob);
1371 }
1372
1373 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1374 {
1375         struct qeth_cmd_buffer *iob;
1376         struct qeth_card *card;
1377
1378         if (!dev)
1379                 return -ENODEV;
1380         card = dev->ml_priv;
1381         if (!card)
1382                 return -ENODEV;
1383         QETH_CARD_TEXT(card, 2, "osnsdmc");
1384         if (!qeth_card_hw_is_reachable(card))
1385                 return -ENODEV;
1386         iob = qeth_wait_for_buffer(&card->write);
1387         memcpy(__ipa_cmd(iob), data, data_len);
1388         return qeth_osn_send_ipa_cmd(card, iob, data_len);
1389 }
1390 EXPORT_SYMBOL(qeth_osn_assist);
1391
1392 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1393                   int (*assist_cb)(struct net_device *, void *),
1394                   int (*data_cb)(struct sk_buff *))
1395 {
1396         struct qeth_card *card;
1397
1398         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1399         if (*dev == NULL)
1400                 return -ENODEV;
1401         card = (*dev)->ml_priv;
1402         if (!card)
1403                 return -ENODEV;
1404         QETH_CARD_TEXT(card, 2, "osnreg");
1405         if ((assist_cb == NULL) || (data_cb == NULL))
1406                 return -EINVAL;
1407         card->osn_info.assist_cb = assist_cb;
1408         card->osn_info.data_cb = data_cb;
1409         return 0;
1410 }
1411 EXPORT_SYMBOL(qeth_osn_register);
1412
1413 void qeth_osn_deregister(struct net_device *dev)
1414 {
1415         struct qeth_card *card;
1416
1417         if (!dev)
1418                 return;
1419         card = dev->ml_priv;
1420         if (!card)
1421                 return;
1422         QETH_CARD_TEXT(card, 2, "osndereg");
1423         card->osn_info.assist_cb = NULL;
1424         card->osn_info.data_cb = NULL;
1425         return;
1426 }
1427 EXPORT_SYMBOL(qeth_osn_deregister);
1428
1429 /* SETBRIDGEPORT support, async notifications */
1430
1431 enum qeth_an_event_type {anev_reg_unreg, anev_abort, anev_reset};
1432
1433 /**
1434  * qeth_bridge_emit_host_event() - bridgeport address change notification
1435  * @card:  qeth_card structure pointer, for udev events.
1436  * @evtype:  "normal" register/unregister, or abort, or reset. For abort
1437  *            and reset token and addr_lnid are unused and may be NULL.
1438  * @code:  event bitmask: high order bit 0x80 value 1 means removal of an
1439  *                        object, 0 - addition of an object.
1440  *                        0x01 - VLAN, 0x02 - MAC, 0x03 - VLAN and MAC.
1441  * @token: "network token" structure identifying physical address of the port.
1442  * @addr_lnid: pointer to structure with MAC address and VLAN ID.
1443  *
1444  * This function is called when registrations and deregistrations are
1445  * reported by the hardware, and also when notifications are enabled -
1446  * for all currently registered addresses.
1447  */
1448 static void qeth_bridge_emit_host_event(struct qeth_card *card,
1449         enum qeth_an_event_type evtype,
1450         u8 code, struct net_if_token *token, struct mac_addr_lnid *addr_lnid)
1451 {
1452         char str[7][32];
1453         char *env[8];
1454         int i = 0;
1455
1456         switch (evtype) {
1457         case anev_reg_unreg:
1458                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=%s",
1459                                 (code & IPA_ADDR_CHANGE_CODE_REMOVAL)
1460                                 ? "deregister" : "register");
1461                 env[i] = str[i]; i++;
1462                 if (code & IPA_ADDR_CHANGE_CODE_VLANID) {
1463                         snprintf(str[i], sizeof(str[i]), "VLAN=%d",
1464                                 addr_lnid->lnid);
1465                         env[i] = str[i]; i++;
1466                 }
1467                 if (code & IPA_ADDR_CHANGE_CODE_MACADDR) {
1468                         snprintf(str[i], sizeof(str[i]), "MAC=%pM",
1469                                 addr_lnid->mac);
1470                         env[i] = str[i]; i++;
1471                 }
1472                 snprintf(str[i], sizeof(str[i]), "NTOK_BUSID=%x.%x.%04x",
1473                         token->cssid, token->ssid, token->devnum);
1474                 env[i] = str[i]; i++;
1475                 snprintf(str[i], sizeof(str[i]), "NTOK_IID=%02x", token->iid);
1476                 env[i] = str[i]; i++;
1477                 snprintf(str[i], sizeof(str[i]), "NTOK_CHPID=%02x",
1478                                 token->chpid);
1479                 env[i] = str[i]; i++;
1480                 snprintf(str[i], sizeof(str[i]), "NTOK_CHID=%04x", token->chid);
1481                 env[i] = str[i]; i++;
1482                 break;
1483         case anev_abort:
1484                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=abort");
1485                 env[i] = str[i]; i++;
1486                 break;
1487         case anev_reset:
1488                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=reset");
1489                 env[i] = str[i]; i++;
1490                 break;
1491         }
1492         env[i] = NULL;
1493         kobject_uevent_env(&card->gdev->dev.kobj, KOBJ_CHANGE, env);
1494 }
1495
1496 struct qeth_bridge_state_data {
1497         struct work_struct worker;
1498         struct qeth_card *card;
1499         struct qeth_sbp_state_change qports;
1500 };
1501
1502 static void qeth_bridge_state_change_worker(struct work_struct *work)
1503 {
1504         struct qeth_bridge_state_data *data =
1505                 container_of(work, struct qeth_bridge_state_data, worker);
1506         /* We are only interested in the first entry - local port */
1507         struct qeth_sbp_port_entry *entry = &data->qports.entry[0];
1508         char env_locrem[32];
1509         char env_role[32];
1510         char env_state[32];
1511         char *env[] = {
1512                 env_locrem,
1513                 env_role,
1514                 env_state,
1515                 NULL
1516         };
1517
1518         /* Role should not change by itself, but if it did, */
1519         /* information from the hardware is authoritative.  */
1520         mutex_lock(&data->card->conf_mutex);
1521         data->card->options.sbp.role = entry->role;
1522         mutex_unlock(&data->card->conf_mutex);
1523
1524         snprintf(env_locrem, sizeof(env_locrem), "BRIDGEPORT=statechange");
1525         snprintf(env_role, sizeof(env_role), "ROLE=%s",
1526                 (entry->role == QETH_SBP_ROLE_NONE) ? "none" :
1527                 (entry->role == QETH_SBP_ROLE_PRIMARY) ? "primary" :
1528                 (entry->role == QETH_SBP_ROLE_SECONDARY) ? "secondary" :
1529                 "<INVALID>");
1530         snprintf(env_state, sizeof(env_state), "STATE=%s",
1531                 (entry->state == QETH_SBP_STATE_INACTIVE) ? "inactive" :
1532                 (entry->state == QETH_SBP_STATE_STANDBY) ? "standby" :
1533                 (entry->state == QETH_SBP_STATE_ACTIVE) ? "active" :
1534                 "<INVALID>");
1535         kobject_uevent_env(&data->card->gdev->dev.kobj,
1536                                 KOBJ_CHANGE, env);
1537         kfree(data);
1538 }
1539
1540 static void qeth_bridge_state_change(struct qeth_card *card,
1541                                         struct qeth_ipa_cmd *cmd)
1542 {
1543         struct qeth_sbp_state_change *qports =
1544                  &cmd->data.sbp.data.state_change;
1545         struct qeth_bridge_state_data *data;
1546         int extrasize;
1547
1548         QETH_CARD_TEXT(card, 2, "brstchng");
1549         if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1550                 QETH_CARD_TEXT_(card, 2, "BPsz%04x", qports->entry_length);
1551                 return;
1552         }
1553         extrasize = sizeof(struct qeth_sbp_port_entry) * qports->num_entries;
1554         data = kzalloc(sizeof(struct qeth_bridge_state_data) + extrasize,
1555                 GFP_ATOMIC);
1556         if (!data) {
1557                 QETH_CARD_TEXT(card, 2, "BPSalloc");
1558                 return;
1559         }
1560         INIT_WORK(&data->worker, qeth_bridge_state_change_worker);
1561         data->card = card;
1562         memcpy(&data->qports, qports,
1563                         sizeof(struct qeth_sbp_state_change) + extrasize);
1564         queue_work(qeth_wq, &data->worker);
1565 }
1566
1567 struct qeth_bridge_host_data {
1568         struct work_struct worker;
1569         struct qeth_card *card;
1570         struct qeth_ipacmd_addr_change hostevs;
1571 };
1572
1573 static void qeth_bridge_host_event_worker(struct work_struct *work)
1574 {
1575         struct qeth_bridge_host_data *data =
1576                 container_of(work, struct qeth_bridge_host_data, worker);
1577         int i;
1578
1579         if (data->hostevs.lost_event_mask) {
1580                 dev_info(&data->card->gdev->dev,
1581 "Address notification from the Bridge Port stopped %s (%s)\n",
1582                         data->card->dev->name,
1583                         (data->hostevs.lost_event_mask == 0x01)
1584                         ? "Overflow"
1585                         : (data->hostevs.lost_event_mask == 0x02)
1586                         ? "Bridge port state change"
1587                         : "Unknown reason");
1588                 mutex_lock(&data->card->conf_mutex);
1589                 data->card->options.sbp.hostnotification = 0;
1590                 mutex_unlock(&data->card->conf_mutex);
1591                 qeth_bridge_emit_host_event(data->card, anev_abort,
1592                         0, NULL, NULL);
1593         } else
1594                 for (i = 0; i < data->hostevs.num_entries; i++) {
1595                         struct qeth_ipacmd_addr_change_entry *entry =
1596                                         &data->hostevs.entry[i];
1597                         qeth_bridge_emit_host_event(data->card,
1598                                         anev_reg_unreg,
1599                                         entry->change_code,
1600                                         &entry->token, &entry->addr_lnid);
1601                 }
1602         kfree(data);
1603 }
1604
1605 static void qeth_bridge_host_event(struct qeth_card *card,
1606                                         struct qeth_ipa_cmd *cmd)
1607 {
1608         struct qeth_ipacmd_addr_change *hostevs =
1609                  &cmd->data.addrchange;
1610         struct qeth_bridge_host_data *data;
1611         int extrasize;
1612
1613         QETH_CARD_TEXT(card, 2, "brhostev");
1614         if (cmd->hdr.return_code != 0x0000) {
1615                 if (cmd->hdr.return_code == 0x0010) {
1616                         if (hostevs->lost_event_mask == 0x00)
1617                                 hostevs->lost_event_mask = 0xff;
1618                 } else {
1619                         QETH_CARD_TEXT_(card, 2, "BPHe%04x",
1620                                 cmd->hdr.return_code);
1621                         return;
1622                 }
1623         }
1624         extrasize = sizeof(struct qeth_ipacmd_addr_change_entry) *
1625                                                 hostevs->num_entries;
1626         data = kzalloc(sizeof(struct qeth_bridge_host_data) + extrasize,
1627                 GFP_ATOMIC);
1628         if (!data) {
1629                 QETH_CARD_TEXT(card, 2, "BPHalloc");
1630                 return;
1631         }
1632         INIT_WORK(&data->worker, qeth_bridge_host_event_worker);
1633         data->card = card;
1634         memcpy(&data->hostevs, hostevs,
1635                         sizeof(struct qeth_ipacmd_addr_change) + extrasize);
1636         queue_work(qeth_wq, &data->worker);
1637 }
1638
1639 /* SETBRIDGEPORT support; sending commands */
1640
1641 struct _qeth_sbp_cbctl {
1642         u16 ipa_rc;
1643         u16 cmd_rc;
1644         union {
1645                 u32 supported;
1646                 struct {
1647                         enum qeth_sbp_roles *role;
1648                         enum qeth_sbp_states *state;
1649                 } qports;
1650         } data;
1651 };
1652
1653 /**
1654  * qeth_bridgeport_makerc() - derive "traditional" error from hardware codes.
1655  * @card:                     qeth_card structure pointer, for debug messages.
1656  * @cbctl:                    state structure with hardware return codes.
1657  * @setcmd:                   IPA command code
1658  *
1659  * Returns negative errno-compatible error indication or 0 on success.
1660  */
1661 static int qeth_bridgeport_makerc(struct qeth_card *card,
1662         struct _qeth_sbp_cbctl *cbctl, enum qeth_ipa_sbp_cmd setcmd)
1663 {
1664         int rc;
1665         int is_iqd = (card->info.type == QETH_CARD_TYPE_IQD);
1666
1667         if ((is_iqd && (cbctl->ipa_rc == IPA_RC_SUCCESS)) ||
1668             (!is_iqd && (cbctl->ipa_rc == cbctl->cmd_rc)))
1669                 switch (cbctl->cmd_rc) {
1670                 case IPA_RC_SUCCESS:
1671                         rc = 0;
1672                         break;
1673                 case IPA_RC_L2_UNSUPPORTED_CMD:
1674                 case IPA_RC_UNSUPPORTED_COMMAND:
1675                         rc = -EOPNOTSUPP;
1676                         break;
1677                 case IPA_RC_SBP_OSA_NOT_CONFIGURED:
1678                 case IPA_RC_SBP_IQD_NOT_CONFIGURED:
1679                         rc = -ENODEV; /* maybe not the best code here? */
1680                         dev_err(&card->gdev->dev,
1681         "The device is not configured as a Bridge Port\n");
1682                         break;
1683                 case IPA_RC_SBP_OSA_OS_MISMATCH:
1684                 case IPA_RC_SBP_IQD_OS_MISMATCH:
1685                         rc = -EPERM;
1686                         dev_err(&card->gdev->dev,
1687         "A Bridge Port is already configured by a different operating system\n");
1688                         break;
1689                 case IPA_RC_SBP_OSA_ANO_DEV_PRIMARY:
1690                 case IPA_RC_SBP_IQD_ANO_DEV_PRIMARY:
1691                         switch (setcmd) {
1692                         case IPA_SBP_SET_PRIMARY_BRIDGE_PORT:
1693                                 rc = -EEXIST;
1694                                 dev_err(&card->gdev->dev,
1695         "The LAN already has a primary Bridge Port\n");
1696                                 break;
1697                         case IPA_SBP_SET_SECONDARY_BRIDGE_PORT:
1698                                 rc = -EBUSY;
1699                                 dev_err(&card->gdev->dev,
1700         "The device is already a primary Bridge Port\n");
1701                                 break;
1702                         default:
1703                                 rc = -EIO;
1704                         }
1705                         break;
1706                 case IPA_RC_SBP_OSA_CURRENT_SECOND:
1707                 case IPA_RC_SBP_IQD_CURRENT_SECOND:
1708                         rc = -EBUSY;
1709                         dev_err(&card->gdev->dev,
1710         "The device is already a secondary Bridge Port\n");
1711                         break;
1712                 case IPA_RC_SBP_OSA_LIMIT_SECOND:
1713                 case IPA_RC_SBP_IQD_LIMIT_SECOND:
1714                         rc = -EEXIST;
1715                         dev_err(&card->gdev->dev,
1716         "The LAN cannot have more secondary Bridge Ports\n");
1717                         break;
1718                 case IPA_RC_SBP_OSA_CURRENT_PRIMARY:
1719                 case IPA_RC_SBP_IQD_CURRENT_PRIMARY:
1720                         rc = -EBUSY;
1721                         dev_err(&card->gdev->dev,
1722         "The device is already a primary Bridge Port\n");
1723                         break;
1724                 case IPA_RC_SBP_OSA_NOT_AUTHD_BY_ZMAN:
1725                 case IPA_RC_SBP_IQD_NOT_AUTHD_BY_ZMAN:
1726                         rc = -EACCES;
1727                         dev_err(&card->gdev->dev,
1728         "The device is not authorized to be a Bridge Port\n");
1729                         break;
1730                 default:
1731                         rc = -EIO;
1732                 }
1733         else
1734                 switch (cbctl->ipa_rc) {
1735                 case IPA_RC_NOTSUPP:
1736                         rc = -EOPNOTSUPP;
1737                         break;
1738                 case IPA_RC_UNSUPPORTED_COMMAND:
1739                         rc = -EOPNOTSUPP;
1740                         break;
1741                 default:
1742                         rc = -EIO;
1743                 }
1744
1745         if (rc) {
1746                 QETH_CARD_TEXT_(card, 2, "SBPi%04x", cbctl->ipa_rc);
1747                 QETH_CARD_TEXT_(card, 2, "SBPc%04x", cbctl->cmd_rc);
1748         }
1749         return rc;
1750 }
1751
1752 static struct qeth_cmd_buffer *qeth_sbp_build_cmd(struct qeth_card *card,
1753                                                   enum qeth_ipa_sbp_cmd sbp_cmd,
1754                                                   unsigned int cmd_length)
1755 {
1756         enum qeth_ipa_cmds ipa_cmd = (card->info.type == QETH_CARD_TYPE_IQD) ?
1757                                         IPA_CMD_SETBRIDGEPORT_IQD :
1758                                         IPA_CMD_SETBRIDGEPORT_OSA;
1759         struct qeth_cmd_buffer *iob;
1760         struct qeth_ipa_cmd *cmd;
1761
1762         iob = qeth_get_ipacmd_buffer(card, ipa_cmd, 0);
1763         if (!iob)
1764                 return iob;
1765         cmd = __ipa_cmd(iob);
1766         cmd->data.sbp.hdr.cmdlength = sizeof(struct qeth_ipacmd_sbp_hdr) +
1767                                       cmd_length;
1768         cmd->data.sbp.hdr.command_code = sbp_cmd;
1769         cmd->data.sbp.hdr.used_total = 1;
1770         cmd->data.sbp.hdr.seq_no = 1;
1771         return iob;
1772 }
1773
1774 static int qeth_bridgeport_query_support_cb(struct qeth_card *card,
1775         struct qeth_reply *reply, unsigned long data)
1776 {
1777         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1778         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1779         QETH_CARD_TEXT(card, 2, "brqsupcb");
1780         cbctl->ipa_rc = cmd->hdr.return_code;
1781         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1782         if ((cbctl->ipa_rc == 0) && (cbctl->cmd_rc == 0)) {
1783                 cbctl->data.supported =
1784                         cmd->data.sbp.data.query_cmds_supp.supported_cmds;
1785         } else {
1786                 cbctl->data.supported = 0;
1787         }
1788         return 0;
1789 }
1790
1791 /**
1792  * qeth_bridgeport_query_support() - store bitmask of supported subfunctions.
1793  * @card:                            qeth_card structure pointer.
1794  *
1795  * Sets bitmask of supported setbridgeport subfunctions in the qeth_card
1796  * strucutre: card->options.sbp.supported_funcs.
1797  */
1798 static void qeth_bridgeport_query_support(struct qeth_card *card)
1799 {
1800         struct qeth_cmd_buffer *iob;
1801         struct _qeth_sbp_cbctl cbctl;
1802
1803         QETH_CARD_TEXT(card, 2, "brqsuppo");
1804         iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_COMMANDS_SUPPORTED,
1805                                  sizeof(struct qeth_sbp_query_cmds_supp));
1806         if (!iob)
1807                 return;
1808         if (qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_support_cb,
1809                                                         (void *)&cbctl) ||
1810             qeth_bridgeport_makerc(card, &cbctl,
1811                                         IPA_SBP_QUERY_COMMANDS_SUPPORTED)) {
1812                 /* non-zero makerc signifies failure, and produce messages */
1813                 card->options.sbp.role = QETH_SBP_ROLE_NONE;
1814                 return;
1815         }
1816         card->options.sbp.supported_funcs = cbctl.data.supported;
1817 }
1818
1819 static int qeth_bridgeport_query_ports_cb(struct qeth_card *card,
1820         struct qeth_reply *reply, unsigned long data)
1821 {
1822         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1823         struct qeth_sbp_query_ports *qports = &cmd->data.sbp.data.query_ports;
1824         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1825
1826         QETH_CARD_TEXT(card, 2, "brqprtcb");
1827         cbctl->ipa_rc = cmd->hdr.return_code;
1828         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1829         if ((cbctl->ipa_rc != 0) || (cbctl->cmd_rc != 0))
1830                 return 0;
1831         if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1832                 cbctl->cmd_rc = 0xffff;
1833                 QETH_CARD_TEXT_(card, 2, "SBPs%04x", qports->entry_length);
1834                 return 0;
1835         }
1836         /* first entry contains the state of the local port */
1837         if (qports->num_entries > 0) {
1838                 if (cbctl->data.qports.role)
1839                         *cbctl->data.qports.role = qports->entry[0].role;
1840                 if (cbctl->data.qports.state)
1841                         *cbctl->data.qports.state = qports->entry[0].state;
1842         }
1843         return 0;
1844 }
1845
1846 /**
1847  * qeth_bridgeport_query_ports() - query local bridgeport status.
1848  * @card:                          qeth_card structure pointer.
1849  * @role:   Role of the port: 0-none, 1-primary, 2-secondary.
1850  * @state:  State of the port: 0-inactive, 1-standby, 2-active.
1851  *
1852  * Returns negative errno-compatible error indication or 0 on success.
1853  *
1854  * 'role' and 'state' are not updated in case of hardware operation failure.
1855  */
1856 int qeth_bridgeport_query_ports(struct qeth_card *card,
1857         enum qeth_sbp_roles *role, enum qeth_sbp_states *state)
1858 {
1859         int rc = 0;
1860         struct qeth_cmd_buffer *iob;
1861         struct _qeth_sbp_cbctl cbctl = {
1862                 .data = {
1863                         .qports = {
1864                                 .role = role,
1865                                 .state = state,
1866                         },
1867                 },
1868         };
1869
1870         QETH_CARD_TEXT(card, 2, "brqports");
1871         if (!(card->options.sbp.supported_funcs & IPA_SBP_QUERY_BRIDGE_PORTS))
1872                 return -EOPNOTSUPP;
1873         iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_BRIDGE_PORTS, 0);
1874         if (!iob)
1875                 return -ENOMEM;
1876         rc = qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_ports_cb,
1877                                 (void *)&cbctl);
1878         if (rc < 0)
1879                 return rc;
1880         return qeth_bridgeport_makerc(card, &cbctl, IPA_SBP_QUERY_BRIDGE_PORTS);
1881 }
1882 EXPORT_SYMBOL_GPL(qeth_bridgeport_query_ports);
1883
1884 static int qeth_bridgeport_set_cb(struct qeth_card *card,
1885         struct qeth_reply *reply, unsigned long data)
1886 {
1887         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
1888         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1889         QETH_CARD_TEXT(card, 2, "brsetrcb");
1890         cbctl->ipa_rc = cmd->hdr.return_code;
1891         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1892         return 0;
1893 }
1894
1895 /**
1896  * qeth_bridgeport_setrole() - Assign primary role to the port.
1897  * @card:                      qeth_card structure pointer.
1898  * @role:                      Role to assign.
1899  *
1900  * Returns negative errno-compatible error indication or 0 on success.
1901  */
1902 int qeth_bridgeport_setrole(struct qeth_card *card, enum qeth_sbp_roles role)
1903 {
1904         int rc = 0;
1905         int cmdlength;
1906         struct qeth_cmd_buffer *iob;
1907         struct _qeth_sbp_cbctl cbctl;
1908         enum qeth_ipa_sbp_cmd setcmd;
1909
1910         QETH_CARD_TEXT(card, 2, "brsetrol");
1911         switch (role) {
1912         case QETH_SBP_ROLE_NONE:
1913                 setcmd = IPA_SBP_RESET_BRIDGE_PORT_ROLE;
1914                 cmdlength = sizeof(struct qeth_sbp_reset_role);
1915                 break;
1916         case QETH_SBP_ROLE_PRIMARY:
1917                 setcmd = IPA_SBP_SET_PRIMARY_BRIDGE_PORT;
1918                 cmdlength = sizeof(struct qeth_sbp_set_primary);
1919                 break;
1920         case QETH_SBP_ROLE_SECONDARY:
1921                 setcmd = IPA_SBP_SET_SECONDARY_BRIDGE_PORT;
1922                 cmdlength = sizeof(struct qeth_sbp_set_secondary);
1923                 break;
1924         default:
1925                 return -EINVAL;
1926         }
1927         if (!(card->options.sbp.supported_funcs & setcmd))
1928                 return -EOPNOTSUPP;
1929         iob = qeth_sbp_build_cmd(card, setcmd, cmdlength);
1930         if (!iob)
1931                 return -ENOMEM;
1932         rc = qeth_send_ipa_cmd(card, iob, qeth_bridgeport_set_cb,
1933                                 (void *)&cbctl);
1934         if (rc < 0)
1935                 return rc;
1936         return qeth_bridgeport_makerc(card, &cbctl, setcmd);
1937 }
1938
1939 /**
1940  * qeth_anset_makerc() - derive "traditional" error from hardware codes.
1941  * @card:                     qeth_card structure pointer, for debug messages.
1942  *
1943  * Returns negative errno-compatible error indication or 0 on success.
1944  */
1945 static int qeth_anset_makerc(struct qeth_card *card, int pnso_rc, u16 response)
1946 {
1947         int rc;
1948
1949         if (pnso_rc == 0)
1950                 switch (response) {
1951                 case 0x0001:
1952                         rc = 0;
1953                         break;
1954                 case 0x0004:
1955                 case 0x0100:
1956                 case 0x0106:
1957                         rc = -EOPNOTSUPP;
1958                         dev_err(&card->gdev->dev,
1959                                 "Setting address notification failed\n");
1960                         break;
1961                 case 0x0107:
1962                         rc = -EAGAIN;
1963                         break;
1964                 default:
1965                         rc = -EIO;
1966                 }
1967         else
1968                 rc = -EIO;
1969
1970         if (rc) {
1971                 QETH_CARD_TEXT_(card, 2, "SBPp%04x", pnso_rc);
1972                 QETH_CARD_TEXT_(card, 2, "SBPr%04x", response);
1973         }
1974         return rc;
1975 }
1976
1977 static void qeth_bridgeport_an_set_cb(void *priv,
1978                 enum qdio_brinfo_entry_type type, void *entry)
1979 {
1980         struct qeth_card *card = (struct qeth_card *)priv;
1981         struct qdio_brinfo_entry_l2 *l2entry;
1982         u8 code;
1983
1984         if (type != l2_addr_lnid) {
1985                 WARN_ON_ONCE(1);
1986                 return;
1987         }
1988
1989         l2entry = (struct qdio_brinfo_entry_l2 *)entry;
1990         code = IPA_ADDR_CHANGE_CODE_MACADDR;
1991         if (l2entry->addr_lnid.lnid)
1992                 code |= IPA_ADDR_CHANGE_CODE_VLANID;
1993         qeth_bridge_emit_host_event(card, anev_reg_unreg, code,
1994                 (struct net_if_token *)&l2entry->nit,
1995                 (struct mac_addr_lnid *)&l2entry->addr_lnid);
1996 }
1997
1998 /**
1999  * qeth_bridgeport_an_set() - Enable or disable bridgeport address notification
2000  * @card:                     qeth_card structure pointer.
2001  * @enable:                   0 - disable, non-zero - enable notifications
2002  *
2003  * Returns negative errno-compatible error indication or 0 on success.
2004  *
2005  * On enable, emits a series of address notifications udev events for all
2006  * currently registered hosts.
2007  */
2008 int qeth_bridgeport_an_set(struct qeth_card *card, int enable)
2009 {
2010         int rc;
2011         u16 response;
2012         struct ccw_device *ddev;
2013         struct subchannel_id schid;
2014
2015         if (!card)
2016                 return -EINVAL;
2017         if (!card->options.sbp.supported_funcs)
2018                 return -EOPNOTSUPP;
2019         ddev = CARD_DDEV(card);
2020         ccw_device_get_schid(ddev, &schid);
2021
2022         if (enable) {
2023                 qeth_bridge_emit_host_event(card, anev_reset, 0, NULL, NULL);
2024                 rc = qdio_pnso_brinfo(schid, 1, &response,
2025                         qeth_bridgeport_an_set_cb, card);
2026         } else
2027                 rc = qdio_pnso_brinfo(schid, 0, &response, NULL, NULL);
2028         return qeth_anset_makerc(card, rc, response);
2029 }
2030 EXPORT_SYMBOL_GPL(qeth_bridgeport_an_set);
2031
2032 static bool qeth_bridgeport_is_in_use(struct qeth_card *card)
2033 {
2034         return (card->options.sbp.role || card->options.sbp.reflect_promisc ||
2035                 card->options.sbp.hostnotification);
2036 }
2037
2038 /* VNIC Characteristics support */
2039
2040 /* handle VNICC IPA command return codes; convert to error codes */
2041 static int qeth_l2_vnicc_makerc(struct qeth_card *card, int ipa_rc)
2042 {
2043         int rc;
2044
2045         switch (ipa_rc) {
2046         case IPA_RC_SUCCESS:
2047                 return ipa_rc;
2048         case IPA_RC_L2_UNSUPPORTED_CMD:
2049         case IPA_RC_NOTSUPP:
2050                 rc = -EOPNOTSUPP;
2051                 break;
2052         case IPA_RC_VNICC_OOSEQ:
2053                 rc = -EALREADY;
2054                 break;
2055         case IPA_RC_VNICC_VNICBP:
2056                 rc = -EBUSY;
2057                 break;
2058         case IPA_RC_L2_ADDR_TABLE_FULL:
2059                 rc = -ENOSPC;
2060                 break;
2061         case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
2062                 rc = -EACCES;
2063                 break;
2064         default:
2065                 rc = -EIO;
2066         }
2067
2068         QETH_CARD_TEXT_(card, 2, "err%04x", ipa_rc);
2069         return rc;
2070 }
2071
2072 /* generic VNICC request call back control */
2073 struct _qeth_l2_vnicc_request_cbctl {
2074         u32 sub_cmd;
2075         struct {
2076                 u32 vnic_char;
2077                 u32 timeout;
2078         } param;
2079         struct {
2080                 union{
2081                         u32 *sup_cmds;
2082                         u32 *timeout;
2083                 };
2084         } result;
2085 };
2086
2087 /* generic VNICC request call back */
2088 static int qeth_l2_vnicc_request_cb(struct qeth_card *card,
2089                                     struct qeth_reply *reply,
2090                                     unsigned long data)
2091 {
2092         struct _qeth_l2_vnicc_request_cbctl *cbctl =
2093                 (struct _qeth_l2_vnicc_request_cbctl *) reply->param;
2094         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2095         struct qeth_ipacmd_vnicc *rep = &cmd->data.vnicc;
2096
2097         QETH_CARD_TEXT(card, 2, "vniccrcb");
2098         if (cmd->hdr.return_code)
2099                 return 0;
2100         /* return results to caller */
2101         card->options.vnicc.sup_chars = rep->hdr.sup;
2102         card->options.vnicc.cur_chars = rep->hdr.cur;
2103
2104         if (cbctl->sub_cmd == IPA_VNICC_QUERY_CMDS)
2105                 *cbctl->result.sup_cmds = rep->query_cmds.sup_cmds;
2106
2107         if (cbctl->sub_cmd == IPA_VNICC_GET_TIMEOUT)
2108                 *cbctl->result.timeout = rep->getset_timeout.timeout;
2109
2110         return 0;
2111 }
2112
2113 /* generic VNICC request */
2114 static int qeth_l2_vnicc_request(struct qeth_card *card,
2115                                  struct _qeth_l2_vnicc_request_cbctl *cbctl)
2116 {
2117         struct qeth_ipacmd_vnicc *req;
2118         struct qeth_cmd_buffer *iob;
2119         struct qeth_ipa_cmd *cmd;
2120         int rc;
2121
2122         QETH_CARD_TEXT(card, 2, "vniccreq");
2123
2124         /* get new buffer for request */
2125         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_VNICC, 0);
2126         if (!iob)
2127                 return -ENOMEM;
2128
2129         /* create header for request */
2130         cmd = __ipa_cmd(iob);
2131         req = &cmd->data.vnicc;
2132
2133         /* create sub command header for request */
2134         req->sub_hdr.data_length = sizeof(req->sub_hdr);
2135         req->sub_hdr.sub_command = cbctl->sub_cmd;
2136
2137         /* create sub command specific request fields */
2138         switch (cbctl->sub_cmd) {
2139         case IPA_VNICC_QUERY_CHARS:
2140                 break;
2141         case IPA_VNICC_QUERY_CMDS:
2142                 req->sub_hdr.data_length += sizeof(req->query_cmds);
2143                 req->query_cmds.vnic_char = cbctl->param.vnic_char;
2144                 break;
2145         case IPA_VNICC_ENABLE:
2146         case IPA_VNICC_DISABLE:
2147                 req->sub_hdr.data_length += sizeof(req->set_char);
2148                 req->set_char.vnic_char = cbctl->param.vnic_char;
2149                 break;
2150         case IPA_VNICC_SET_TIMEOUT:
2151                 req->getset_timeout.timeout = cbctl->param.timeout;
2152                 /* fallthrough */
2153         case IPA_VNICC_GET_TIMEOUT:
2154                 req->sub_hdr.data_length += sizeof(req->getset_timeout);
2155                 req->getset_timeout.vnic_char = cbctl->param.vnic_char;
2156                 break;
2157         default:
2158                 qeth_release_buffer(iob->channel, iob);
2159                 return -EOPNOTSUPP;
2160         }
2161
2162         /* send request */
2163         rc = qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb,
2164                                (void *) cbctl);
2165
2166         return qeth_l2_vnicc_makerc(card, rc);
2167 }
2168
2169 /* VNICC query VNIC characteristics request */
2170 static int qeth_l2_vnicc_query_chars(struct qeth_card *card)
2171 {
2172         struct _qeth_l2_vnicc_request_cbctl cbctl;
2173
2174         /* prepare callback control */
2175         cbctl.sub_cmd = IPA_VNICC_QUERY_CHARS;
2176
2177         QETH_CARD_TEXT(card, 2, "vniccqch");
2178         return qeth_l2_vnicc_request(card, &cbctl);
2179 }
2180
2181 /* VNICC query sub commands request */
2182 static int qeth_l2_vnicc_query_cmds(struct qeth_card *card, u32 vnic_char,
2183                                     u32 *sup_cmds)
2184 {
2185         struct _qeth_l2_vnicc_request_cbctl cbctl;
2186
2187         /* prepare callback control */
2188         cbctl.sub_cmd = IPA_VNICC_QUERY_CMDS;
2189         cbctl.param.vnic_char = vnic_char;
2190         cbctl.result.sup_cmds = sup_cmds;
2191
2192         QETH_CARD_TEXT(card, 2, "vniccqcm");
2193         return qeth_l2_vnicc_request(card, &cbctl);
2194 }
2195
2196 /* VNICC enable/disable characteristic request */
2197 static int qeth_l2_vnicc_set_char(struct qeth_card *card, u32 vnic_char,
2198                                       u32 cmd)
2199 {
2200         struct _qeth_l2_vnicc_request_cbctl cbctl;
2201
2202         /* prepare callback control */
2203         cbctl.sub_cmd = cmd;
2204         cbctl.param.vnic_char = vnic_char;
2205
2206         QETH_CARD_TEXT(card, 2, "vniccedc");
2207         return qeth_l2_vnicc_request(card, &cbctl);
2208 }
2209
2210 /* VNICC get/set timeout for characteristic request */
2211 static int qeth_l2_vnicc_getset_timeout(struct qeth_card *card, u32 vnicc,
2212                                         u32 cmd, u32 *timeout)
2213 {
2214         struct _qeth_l2_vnicc_request_cbctl cbctl;
2215
2216         /* prepare callback control */
2217         cbctl.sub_cmd = cmd;
2218         cbctl.param.vnic_char = vnicc;
2219         if (cmd == IPA_VNICC_SET_TIMEOUT)
2220                 cbctl.param.timeout = *timeout;
2221         if (cmd == IPA_VNICC_GET_TIMEOUT)
2222                 cbctl.result.timeout = timeout;
2223
2224         QETH_CARD_TEXT(card, 2, "vniccgst");
2225         return qeth_l2_vnicc_request(card, &cbctl);
2226 }
2227
2228 /* set current VNICC flag state; called from sysfs store function */
2229 int qeth_l2_vnicc_set_state(struct qeth_card *card, u32 vnicc, bool state)
2230 {
2231         int rc = 0;
2232         u32 cmd;
2233
2234         QETH_CARD_TEXT(card, 2, "vniccsch");
2235
2236         /* do not change anything if BridgePort is enabled */
2237         if (qeth_bridgeport_is_in_use(card))
2238                 return -EBUSY;
2239
2240         /* check if characteristic and enable/disable are supported */
2241         if (!(card->options.vnicc.sup_chars & vnicc) ||
2242             !(card->options.vnicc.set_char_sup & vnicc))
2243                 return -EOPNOTSUPP;
2244
2245         /* set enable/disable command and store wanted characteristic */
2246         if (state) {
2247                 cmd = IPA_VNICC_ENABLE;
2248                 card->options.vnicc.wanted_chars |= vnicc;
2249         } else {
2250                 cmd = IPA_VNICC_DISABLE;
2251                 card->options.vnicc.wanted_chars &= ~vnicc;
2252         }
2253
2254         /* do we need to do anything? */
2255         if (card->options.vnicc.cur_chars == card->options.vnicc.wanted_chars)
2256                 return rc;
2257
2258         /* if card is not ready, simply stop here */
2259         if (!qeth_card_hw_is_reachable(card)) {
2260                 if (state)
2261                         card->options.vnicc.cur_chars |= vnicc;
2262                 else
2263                         card->options.vnicc.cur_chars &= ~vnicc;
2264                 return rc;
2265         }
2266
2267         rc = qeth_l2_vnicc_set_char(card, vnicc, cmd);
2268         if (rc)
2269                 card->options.vnicc.wanted_chars =
2270                         card->options.vnicc.cur_chars;
2271         else {
2272                 /* successful online VNICC change; handle special cases */
2273                 if (state && vnicc == QETH_VNICC_RX_BCAST)
2274                         card->options.vnicc.rx_bcast_enabled = true;
2275                 if (!state && vnicc == QETH_VNICC_LEARNING)
2276                         qeth_l2_vnicc_recover_timeout(card, vnicc,
2277                                         &card->options.vnicc.learning_timeout);
2278         }
2279
2280         return rc;
2281 }
2282
2283 /* get current VNICC flag state; called from sysfs show function */
2284 int qeth_l2_vnicc_get_state(struct qeth_card *card, u32 vnicc, bool *state)
2285 {
2286         int rc = 0;
2287
2288         QETH_CARD_TEXT(card, 2, "vniccgch");
2289
2290         /* do not get anything if BridgePort is enabled */
2291         if (qeth_bridgeport_is_in_use(card))
2292                 return -EBUSY;
2293
2294         /* check if characteristic is supported */
2295         if (!(card->options.vnicc.sup_chars & vnicc))
2296                 return -EOPNOTSUPP;
2297
2298         /* if card is ready, query current VNICC state */
2299         if (qeth_card_hw_is_reachable(card))
2300                 rc = qeth_l2_vnicc_query_chars(card);
2301
2302         *state = (card->options.vnicc.cur_chars & vnicc) ? true : false;
2303         return rc;
2304 }
2305
2306 /* set VNICC timeout; called from sysfs store function. Currently, only learning
2307  * supports timeout
2308  */
2309 int qeth_l2_vnicc_set_timeout(struct qeth_card *card, u32 timeout)
2310 {
2311         int rc = 0;
2312
2313         QETH_CARD_TEXT(card, 2, "vniccsto");
2314
2315         /* do not change anything if BridgePort is enabled */
2316         if (qeth_bridgeport_is_in_use(card))
2317                 return -EBUSY;
2318
2319         /* check if characteristic and set_timeout are supported */
2320         if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
2321             !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
2322                 return -EOPNOTSUPP;
2323
2324         /* do we need to do anything? */
2325         if (card->options.vnicc.learning_timeout == timeout)
2326                 return rc;
2327
2328         /* if card is not ready, simply store the value internally and return */
2329         if (!qeth_card_hw_is_reachable(card)) {
2330                 card->options.vnicc.learning_timeout = timeout;
2331                 return rc;
2332         }
2333
2334         /* send timeout value to card; if successful, store value internally */
2335         rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
2336                                           IPA_VNICC_SET_TIMEOUT, &timeout);
2337         if (!rc)
2338                 card->options.vnicc.learning_timeout = timeout;
2339
2340         return rc;
2341 }
2342
2343 /* get current VNICC timeout; called from sysfs show function. Currently, only
2344  * learning supports timeout
2345  */
2346 int qeth_l2_vnicc_get_timeout(struct qeth_card *card, u32 *timeout)
2347 {
2348         int rc = 0;
2349
2350         QETH_CARD_TEXT(card, 2, "vniccgto");
2351
2352         /* do not get anything if BridgePort is enabled */
2353         if (qeth_bridgeport_is_in_use(card))
2354                 return -EBUSY;
2355
2356         /* check if characteristic and get_timeout are supported */
2357         if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
2358             !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
2359                 return -EOPNOTSUPP;
2360         /* if card is ready, get timeout. Otherwise, just return stored value */
2361         *timeout = card->options.vnicc.learning_timeout;
2362         if (qeth_card_hw_is_reachable(card))
2363                 rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
2364                                                   IPA_VNICC_GET_TIMEOUT,
2365                                                   timeout);
2366
2367         return rc;
2368 }
2369
2370 /* check if VNICC is currently enabled */
2371 bool qeth_l2_vnicc_is_in_use(struct qeth_card *card)
2372 {
2373         /* if everything is turned off, VNICC is not active */
2374         if (!card->options.vnicc.cur_chars)
2375                 return false;
2376         /* default values are only OK if rx_bcast was not enabled by user
2377          * or the card is offline.
2378          */
2379         if (card->options.vnicc.cur_chars == QETH_VNICC_DEFAULT) {
2380                 if (!card->options.vnicc.rx_bcast_enabled ||
2381                     !qeth_card_hw_is_reachable(card))
2382                         return false;
2383         }
2384         return true;
2385 }
2386
2387 /* recover user timeout setting */
2388 static bool qeth_l2_vnicc_recover_timeout(struct qeth_card *card, u32 vnicc,
2389                                           u32 *timeout)
2390 {
2391         if (card->options.vnicc.sup_chars & vnicc &&
2392             card->options.vnicc.getset_timeout_sup & vnicc &&
2393             !qeth_l2_vnicc_getset_timeout(card, vnicc, IPA_VNICC_SET_TIMEOUT,
2394                                           timeout))
2395                 return false;
2396         *timeout = QETH_VNICC_DEFAULT_TIMEOUT;
2397         return true;
2398 }
2399
2400 /* recover user characteristic setting */
2401 static bool qeth_l2_vnicc_recover_char(struct qeth_card *card, u32 vnicc,
2402                                        bool enable)
2403 {
2404         u32 cmd = enable ? IPA_VNICC_ENABLE : IPA_VNICC_DISABLE;
2405
2406         if (card->options.vnicc.sup_chars & vnicc &&
2407             card->options.vnicc.set_char_sup & vnicc &&
2408             !qeth_l2_vnicc_set_char(card, vnicc, cmd))
2409                 return false;
2410         card->options.vnicc.wanted_chars &= ~vnicc;
2411         card->options.vnicc.wanted_chars |= QETH_VNICC_DEFAULT & vnicc;
2412         return true;
2413 }
2414
2415 /* (re-)initialize VNICC */
2416 static void qeth_l2_vnicc_init(struct qeth_card *card)
2417 {
2418         u32 *timeout = &card->options.vnicc.learning_timeout;
2419         unsigned int chars_len, i;
2420         unsigned long chars_tmp;
2421         u32 sup_cmds, vnicc;
2422         bool enable, error;
2423
2424         QETH_CARD_TEXT(card, 2, "vniccini");
2425         /* reset rx_bcast */
2426         card->options.vnicc.rx_bcast_enabled = 0;
2427         /* initial query and storage of VNIC characteristics */
2428         if (qeth_l2_vnicc_query_chars(card)) {
2429                 if (card->options.vnicc.wanted_chars != QETH_VNICC_DEFAULT ||
2430                     *timeout != QETH_VNICC_DEFAULT_TIMEOUT)
2431                         dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
2432                 /* fail quietly if user didn't change the default config */
2433                 card->options.vnicc.sup_chars = 0;
2434                 card->options.vnicc.cur_chars = 0;
2435                 card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
2436                 return;
2437         }
2438         /* get supported commands for each supported characteristic */
2439         chars_tmp = card->options.vnicc.sup_chars;
2440         chars_len = sizeof(card->options.vnicc.sup_chars) * BITS_PER_BYTE;
2441         for_each_set_bit(i, &chars_tmp, chars_len) {
2442                 vnicc = BIT(i);
2443                 qeth_l2_vnicc_query_cmds(card, vnicc, &sup_cmds);
2444                 if (!(sup_cmds & IPA_VNICC_SET_TIMEOUT) ||
2445                     !(sup_cmds & IPA_VNICC_GET_TIMEOUT))
2446                         card->options.vnicc.getset_timeout_sup &= ~vnicc;
2447                 if (!(sup_cmds & IPA_VNICC_ENABLE) ||
2448                     !(sup_cmds & IPA_VNICC_DISABLE))
2449                         card->options.vnicc.set_char_sup &= ~vnicc;
2450         }
2451         /* enforce assumed default values and recover settings, if changed  */
2452         error = qeth_l2_vnicc_recover_timeout(card, QETH_VNICC_LEARNING,
2453                                               timeout);
2454         chars_tmp = card->options.vnicc.wanted_chars ^ QETH_VNICC_DEFAULT;
2455         chars_tmp |= QETH_VNICC_BRIDGE_INVISIBLE;
2456         chars_len = sizeof(card->options.vnicc.wanted_chars) * BITS_PER_BYTE;
2457         for_each_set_bit(i, &chars_tmp, chars_len) {
2458                 vnicc = BIT(i);
2459                 enable = card->options.vnicc.wanted_chars & vnicc;
2460                 error |= qeth_l2_vnicc_recover_char(card, vnicc, enable);
2461         }
2462         if (error)
2463                 dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
2464 }
2465
2466 /* configure default values of VNIC characteristics */
2467 static void qeth_l2_vnicc_set_defaults(struct qeth_card *card)
2468 {
2469         /* characteristics values */
2470         card->options.vnicc.sup_chars = QETH_VNICC_ALL;
2471         card->options.vnicc.cur_chars = QETH_VNICC_DEFAULT;
2472         card->options.vnicc.learning_timeout = QETH_VNICC_DEFAULT_TIMEOUT;
2473         /* supported commands */
2474         card->options.vnicc.set_char_sup = QETH_VNICC_ALL;
2475         card->options.vnicc.getset_timeout_sup = QETH_VNICC_LEARNING;
2476         /* settings wanted by users */
2477         card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
2478 }
2479
2480 module_init(qeth_l2_init);
2481 module_exit(qeth_l2_exit);
2482 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
2483 MODULE_DESCRIPTION("qeth layer 2 discipline");
2484 MODULE_LICENSE("GPL");