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 = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 112         cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
 113         memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
 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                 memcpy(card->dev->dev_addr, mac, OSA_ADDR_LEN);
 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_send_setgroupmac(struct qeth_card *card, __u8 *mac)
 160 {
 161         int rc;
 162
 163         QETH_CARD_TEXT(card, 2, "L2Sgmac");
 164         rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETGMAC);
 165         if (rc == -EEXIST)
 166                 QETH_DBF_MESSAGE(2, "Group MAC %pM already existing on %s\n",
 167                         mac, QETH_CARD_IFNAME(card));
 168         else if (rc)
 169                 QETH_DBF_MESSAGE(2, "Could not set group MAC %pM on %s: %d\n",
 170                         mac, QETH_CARD_IFNAME(card), rc);
 171         return rc;
 172 }
 173
 174 static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac)
 175 {
 176         int rc;
 177
 178         QETH_CARD_TEXT(card, 2, "L2Dgmac");
 179         rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELGMAC);
 180         if (rc)
 181                 QETH_DBF_MESSAGE(2,
 182                         "Could not delete group MAC %pM on %s: %d\n",
 183                         mac, QETH_CARD_IFNAME(card), rc);
 184         return rc;
 185 }
 186
 187 static int qeth_l2_write_mac(struct qeth_card *card, struct qeth_mac *mac)
 188 {
 189         if (mac->is_uc) {
 190                 return qeth_l2_send_setdelmac(card, mac->mac_addr,
 191                                                 IPA_CMD_SETVMAC);
 192         } else {
 193                 return qeth_l2_send_setgroupmac(card, mac->mac_addr);
 194         }
 195 }
 196
 197 static int qeth_l2_remove_mac(struct qeth_card *card, struct qeth_mac *mac)
 198 {
 199         if (mac->is_uc) {
 200                 return qeth_l2_send_setdelmac(card, mac->mac_addr,
 201                                                 IPA_CMD_DELVMAC);
 202         } else {
 203                 return qeth_l2_send_delgroupmac(card, mac->mac_addr);
 204         }
 205 }
 206
 207 static void qeth_l2_del_all_macs(struct qeth_card *card)
 208 {
 209         struct qeth_mac *mac;
 210         struct hlist_node *tmp;
 211         int i;
 212
 213         spin_lock_bh(&card->mclock);
 214         hash_for_each_safe(card->mac_htable, i, tmp, mac, hnode) {
 215                 hash_del(&mac->hnode);
 216                 kfree(mac);
 217         }
 218         spin_unlock_bh(&card->mclock);
 219 }
 220
 221 static int qeth_l2_get_cast_type(struct qeth_card *card, struct sk_buff *skb)
 222 {
 223         if (card->info.type == QETH_CARD_TYPE_OSN)
 224                 return RTN_UNSPEC;
 225         if (is_broadcast_ether_addr(skb->data))
 226                 return RTN_BROADCAST;
 227         if (is_multicast_ether_addr(skb->data))
 228                 return RTN_MULTICAST;
 229         return RTN_UNSPEC;
 230 }
 231
 232 static void qeth_l2_hdr_csum(struct qeth_card *card, struct qeth_hdr *hdr,
 233                              struct sk_buff *skb)
 234 {
 235         struct iphdr *iph = ip_hdr(skb);
 236
 237         /* tcph->check contains already the pseudo hdr checksum
 238          * so just set the header flags
 239          */
 240         if (iph->protocol == IPPROTO_UDP)
 241                 hdr->hdr.l2.flags[1] |= QETH_HDR_EXT_UDP;
 242         hdr->hdr.l2.flags[1] |= QETH_HDR_EXT_CSUM_TRANSP_REQ |
 243                 QETH_HDR_EXT_CSUM_HDR_REQ;
 244         iph->check = 0;
 245         if (card->options.performance_stats)
 246                 card->perf_stats.tx_csum++;
 247 }
 248
 249 static void qeth_l2_fill_header(struct qeth_hdr *hdr, struct sk_buff *skb,
 250                                 int cast_type, unsigned int data_len)
 251 {
 252         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
 253
 254         memset(hdr, 0, sizeof(struct qeth_hdr));
 255         hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
 256         hdr->hdr.l2.pkt_length = data_len;
 257
 258         /* set byte byte 3 to casting flags */
 259         if (cast_type == RTN_MULTICAST)
 260                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 261         else if (cast_type == RTN_BROADCAST)
 262                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 263         else
 264                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 265
 266         /* VSWITCH relies on the VLAN
 267          * information to be present in
 268          * the QDIO header */
 269         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
 270                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
 271                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
 272         }
 273 }
 274
 275 static int qeth_setdelvlan_makerc(struct qeth_card *card, int retcode)
 276 {
 277         if (retcode)
 278                 QETH_CARD_TEXT_(card, 2, "err%04x", retcode);
 279
 280         switch (retcode) {
 281         case IPA_RC_SUCCESS:
 282                 return 0;
 283         case IPA_RC_L2_INVALID_VLAN_ID:
 284                 return -EINVAL;
 285         case IPA_RC_L2_DUP_VLAN_ID:
 286                 return -EEXIST;
 287         case IPA_RC_L2_VLAN_ID_NOT_FOUND:
 288                 return -ENOENT;
 289         case IPA_RC_L2_VLAN_ID_NOT_ALLOWED:
 290                 return -EPERM;
 291         case -ENOMEM:
 292                 return -ENOMEM;
 293         default:
 294                 return -EIO;
 295         }
 296 }
 297
 298 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
 299                                       struct qeth_reply *reply,
 300                                       unsigned long data)
 301 {
 302         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
 303
 304         QETH_CARD_TEXT(card, 2, "L2sdvcb");
 305         if (cmd->hdr.return_code) {
 306                 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x.\n",
 307                                  cmd->data.setdelvlan.vlan_id,
 308                                  QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 309                 QETH_CARD_TEXT_(card, 2, "L2VL%4x", cmd->hdr.command);
 310                 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code);
 311         }
 312         return 0;
 313 }
 314
 315 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
 316                                    enum qeth_ipa_cmds ipacmd)
 317 {
 318         struct qeth_ipa_cmd *cmd;
 319         struct qeth_cmd_buffer *iob;
 320
 321         QETH_CARD_TEXT_(card, 4, "L2sdv%x", ipacmd);
 322         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 323         if (!iob)
 324                 return -ENOMEM;
 325         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 326         cmd->data.setdelvlan.vlan_id = i;
 327         return qeth_setdelvlan_makerc(card, qeth_send_ipa_cmd(card, iob,
 328                                             qeth_l2_send_setdelvlan_cb, NULL));
 329 }
 330
 331 static void qeth_l2_process_vlans(struct qeth_card *card)
 332 {
 333         struct qeth_vlan_vid *id;
 334         QETH_CARD_TEXT(card, 3, "L2prcvln");
 335         spin_lock_bh(&card->vlanlock);
 336         list_for_each_entry(id, &card->vid_list, list) {
 337                 qeth_l2_send_setdelvlan(card, id->vid, IPA_CMD_SETVLAN);
 338         }
 339         spin_unlock_bh(&card->vlanlock);
 340 }
 341
 342 static int qeth_l2_vlan_rx_add_vid(struct net_device *dev,
 343                                    __be16 proto, u16 vid)
 344 {
 345         struct qeth_card *card = dev->ml_priv;
 346         struct qeth_vlan_vid *id;
 347         int rc;
 348
 349         QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
 350         if (!vid)
 351                 return 0;
 352         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 353                 QETH_CARD_TEXT(card, 3, "aidREC");
 354                 return 0;
 355         }
 356         id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
 357         if (id) {
 358                 id->vid = vid;
 359                 rc = qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
 360                 if (rc) {
 361                         kfree(id);
 362                         return rc;
 363                 }
 364                 spin_lock_bh(&card->vlanlock);
 365                 list_add_tail(&id->list, &card->vid_list);
 366                 spin_unlock_bh(&card->vlanlock);
 367         } else {
 368                 return -ENOMEM;
 369         }
 370         return 0;
 371 }
 372
 373 static int qeth_l2_vlan_rx_kill_vid(struct net_device *dev,
 374                                     __be16 proto, u16 vid)
 375 {
 376         struct qeth_vlan_vid *id, *tmpid = NULL;
 377         struct qeth_card *card = dev->ml_priv;
 378         int rc = 0;
 379
 380         QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
 381         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 382                 QETH_CARD_TEXT(card, 3, "kidREC");
 383                 return 0;
 384         }
 385         spin_lock_bh(&card->vlanlock);
 386         list_for_each_entry(id, &card->vid_list, list) {
 387                 if (id->vid == vid) {
 388                         list_del(&id->list);
 389                         tmpid = id;
 390                         break;
 391                 }
 392         }
 393         spin_unlock_bh(&card->vlanlock);
 394         if (tmpid) {
 395                 rc = qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 396                 kfree(tmpid);
 397         }
 398         qeth_l2_set_rx_mode(card->dev);
 399         return rc;
 400 }
 401
 402 static void qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
 403 {
 404         QETH_DBF_TEXT(SETUP , 2, "stopcard");
 405         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 406
 407         qeth_set_allowed_threads(card, 0, 1);
 408         if (card->read.state == CH_STATE_UP &&
 409             card->write.state == CH_STATE_UP &&
 410             (card->state == CARD_STATE_UP)) {
 411                 if (recovery_mode &&
 412                     card->info.type != QETH_CARD_TYPE_OSN) {
 413                         qeth_l2_stop(card->dev);
 414                 } else {
 415                         rtnl_lock();
 416                         dev_close(card->dev);
 417                         rtnl_unlock();
 418                 }
 419                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 420                 card->state = CARD_STATE_SOFTSETUP;
 421         }
 422         if (card->state == CARD_STATE_SOFTSETUP) {
 423                 qeth_l2_del_all_macs(card);
 424                 qeth_clear_ipacmd_list(card);
 425                 card->state = CARD_STATE_HARDSETUP;
 426         }
 427         if (card->state == CARD_STATE_HARDSETUP) {
 428                 qeth_qdio_clear_card(card, 0);
 429                 qeth_clear_qdio_buffers(card);
 430                 qeth_clear_working_pool_list(card);
 431                 card->state = CARD_STATE_DOWN;
 432         }
 433         if (card->state == CARD_STATE_DOWN) {
 434                 qeth_clear_cmd_buffers(&card->read);
 435                 qeth_clear_cmd_buffers(&card->write);
 436         }
 437 }
 438
 439 static int qeth_l2_process_inbound_buffer(struct qeth_card *card,
 440                                 int budget, int *done)
 441 {
 442         int work_done = 0;
 443         struct sk_buff *skb;
 444         struct qeth_hdr *hdr;
 445         unsigned int len;
 446
 447         *done = 0;
 448         WARN_ON_ONCE(!budget);
 449         while (budget) {
 450                 skb = qeth_core_get_next_skb(card,
 451                         &card->qdio.in_q->bufs[card->rx.b_index],
 452                         &card->rx.b_element, &card->rx.e_offset, &hdr);
 453                 if (!skb) {
 454                         *done = 1;
 455                         break;
 456                 }
 457                 skb->dev = card->dev;
 458                 switch (hdr->hdr.l2.id) {
 459                 case QETH_HEADER_TYPE_LAYER2:
 460                         skb->pkt_type = PACKET_HOST;
 461                         skb->protocol = eth_type_trans(skb, skb->dev);
 462                         if ((card->dev->features & NETIF_F_RXCSUM)
 463                            && ((hdr->hdr.l2.flags[1] &
 464                                 (QETH_HDR_EXT_CSUM_HDR_REQ |
 465                                    QETH_HDR_EXT_CSUM_TRANSP_REQ)) ==
 466                                 (QETH_HDR_EXT_CSUM_HDR_REQ |
 467                                    QETH_HDR_EXT_CSUM_TRANSP_REQ)))
 468                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 469                         else
 470                                 skb->ip_summed = CHECKSUM_NONE;
 471                         if (skb->protocol == htons(ETH_P_802_2))
 472                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
 473                         len = skb->len;
 474                         napi_gro_receive(&card->napi, skb);
 475                         break;
 476                 case QETH_HEADER_TYPE_OSN:
 477                         if (card->info.type == QETH_CARD_TYPE_OSN) {
 478                                 skb_push(skb, sizeof(struct qeth_hdr));
 479                                 skb_copy_to_linear_data(skb, hdr,
 480                                                 sizeof(struct qeth_hdr));
 481                                 len = skb->len;
 482                                 card->osn_info.data_cb(skb);
 483                                 break;
 484                         }
 485                         /* else unknown */
 486                 default:
 487                         dev_kfree_skb_any(skb);
 488                         QETH_CARD_TEXT(card, 3, "inbunkno");
 489                         QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
 490                         continue;
 491                 }
 492                 work_done++;
 493                 budget--;
 494                 card->stats.rx_packets++;
 495                 card->stats.rx_bytes += len;
 496         }
 497         return work_done;
 498 }
 499
 500 static int qeth_l2_request_initial_mac(struct qeth_card *card)
 501 {
 502         int rc = 0;
 503         char vendor_pre[] = {0x02, 0x00, 0x00};
 504
 505         QETH_DBF_TEXT(SETUP, 2, "l2reqmac");
 506         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
 507
 508         if (MACHINE_IS_VM) {
 509                 rc = qeth_vm_request_mac(card);
 510                 if (!rc)
 511                         goto out;
 512                 QETH_DBF_MESSAGE(2, "z/VM MAC Service failed on device %s: x%x\n",
 513                                  CARD_BUS_ID(card), rc);
 514                 QETH_DBF_TEXT_(SETUP, 2, "err%04x", rc);
 515                 /* fall back to alternative mechanism: */
 516         }
 517
 518         if (card->info.type == QETH_CARD_TYPE_IQD ||
 519             card->info.type == QETH_CARD_TYPE_OSM ||
 520             card->info.type == QETH_CARD_TYPE_OSX ||
 521             card->info.guestlan) {
 522                 rc = qeth_setadpparms_change_macaddr(card);
 523                 if (rc) {
 524                         QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
 525                                 "device %s: x%x\n", CARD_BUS_ID(card), rc);
 526                         QETH_DBF_TEXT_(SETUP, 2, "1err%04x", rc);
 527                         return rc;
 528                 }
 529         } else {
 530                 eth_random_addr(card->dev->dev_addr);
 531                 memcpy(card->dev->dev_addr, vendor_pre, 3);
 532         }
 533 out:
 534         QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, card->dev->addr_len);
 535         return 0;
 536 }
 537
 538 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 539 {
 540         struct sockaddr *addr = p;
 541         struct qeth_card *card = dev->ml_priv;
 542         int rc = 0;
 543
 544         QETH_CARD_TEXT(card, 3, "setmac");
 545
 546         if (card->info.type == QETH_CARD_TYPE_OSN ||
 547             card->info.type == QETH_CARD_TYPE_OSM ||
 548             card->info.type == QETH_CARD_TYPE_OSX) {
 549                 QETH_CARD_TEXT(card, 3, "setmcTYP");
 550                 return -EOPNOTSUPP;
 551         }
 552         QETH_CARD_HEX(card, 3, addr->sa_data, OSA_ADDR_LEN);
 553         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 554                 QETH_CARD_TEXT(card, 3, "setmcREC");
 555                 return -ERESTARTSYS;
 556         }
 557         rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
 558         if (!rc || (rc == -ENOENT))
 559                 rc = qeth_l2_send_setmac(card, addr->sa_data);
 560         return rc ? -EINVAL : 0;
 561 }
 562
 563 static void qeth_promisc_to_bridge(struct qeth_card *card)
 564 {
 565         struct net_device *dev = card->dev;
 566         enum qeth_ipa_promisc_modes promisc_mode;
 567         int role;
 568         int rc;
 569
 570         QETH_CARD_TEXT(card, 3, "pmisc2br");
 571
 572         if (!card->options.sbp.reflect_promisc)
 573                 return;
 574         promisc_mode = (dev->flags & IFF_PROMISC) ? SET_PROMISC_MODE_ON
 575                                                 : SET_PROMISC_MODE_OFF;
 576         if (promisc_mode == card->info.promisc_mode)
 577                 return;
 578
 579         if (promisc_mode == SET_PROMISC_MODE_ON) {
 580                 if (card->options.sbp.reflect_promisc_primary)
 581                         role = QETH_SBP_ROLE_PRIMARY;
 582                 else
 583                         role = QETH_SBP_ROLE_SECONDARY;
 584         } else
 585                 role = QETH_SBP_ROLE_NONE;
 586
 587         rc = qeth_bridgeport_setrole(card, role);
 588         QETH_DBF_TEXT_(SETUP, 2, "bpm%c%04x",
 589                         (promisc_mode == SET_PROMISC_MODE_ON) ? '+' : '-', rc);
 590         if (!rc) {
 591                 card->options.sbp.role = role;
 592                 card->info.promisc_mode = promisc_mode;
 593         }
 594
 595 }
 596 /* New MAC address is added to the hash table and marked to be written on card
 597  * only if there is not in the hash table storage already
 598  *
 599 */
 600 static void qeth_l2_add_mac(struct qeth_card *card, struct netdev_hw_addr *ha,
 601                             u8 is_uc)
 602 {
 603         u32 mac_hash = get_unaligned((u32 *)(&ha->addr[2]));
 604         struct qeth_mac *mac;
 605
 606         hash_for_each_possible(card->mac_htable, mac, hnode, mac_hash) {
 607                 if (is_uc == mac->is_uc &&
 608                     !memcmp(ha->addr, mac->mac_addr, OSA_ADDR_LEN)) {
 609                         mac->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
 610                         return;
 611                 }
 612         }
 613
 614         mac = kzalloc(sizeof(struct qeth_mac), GFP_ATOMIC);
 615
 616         if (!mac)
 617                 return;
 618
 619         memcpy(mac->mac_addr, ha->addr, OSA_ADDR_LEN);
 620         mac->is_uc = is_uc;
 621         mac->disp_flag = QETH_DISP_ADDR_ADD;
 622
 623         hash_add(card->mac_htable, &mac->hnode, mac_hash);
 624 }
 625
 626 static void qeth_l2_set_rx_mode(struct net_device *dev)
 627 {
 628         struct qeth_card *card = dev->ml_priv;
 629         struct netdev_hw_addr *ha;
 630         struct qeth_mac *mac;
 631         struct hlist_node *tmp;
 632         int i;
 633         int rc;
 634
 635         if (card->info.type == QETH_CARD_TYPE_OSN)
 636                 return;
 637
 638         QETH_CARD_TEXT(card, 3, "setmulti");
 639         if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
 640             (card->state != CARD_STATE_UP))
 641                 return;
 642
 643         spin_lock_bh(&card->mclock);
 644
 645         netdev_for_each_mc_addr(ha, dev)
 646                 qeth_l2_add_mac(card, ha, 0);
 647
 648         netdev_for_each_uc_addr(ha, dev)
 649                 qeth_l2_add_mac(card, ha, 1);
 650
 651         hash_for_each_safe(card->mac_htable, i, tmp, mac, hnode) {
 652                 if (mac->disp_flag == QETH_DISP_ADDR_DELETE) {
 653                         qeth_l2_remove_mac(card, mac);
 654                         hash_del(&mac->hnode);
 655                         kfree(mac);
 656
 657                 } else if (mac->disp_flag == QETH_DISP_ADDR_ADD) {
 658                         rc = qeth_l2_write_mac(card, mac);
 659                         if (rc) {
 660                                 hash_del(&mac->hnode);
 661                                 kfree(mac);
 662                         } else
 663                                 mac->disp_flag = QETH_DISP_ADDR_DELETE;
 664                 } else
 665                         mac->disp_flag = QETH_DISP_ADDR_DELETE;
 666         }
 667
 668         spin_unlock_bh(&card->mclock);
 669
 670         if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
 671                 qeth_setadp_promisc_mode(card);
 672         else
 673                 qeth_promisc_to_bridge(card);
 674 }
 675
 676 static int qeth_l2_xmit_iqd(struct qeth_card *card, struct sk_buff *skb,
 677                             struct qeth_qdio_out_q *queue, int cast_type)
 678 {
 679         unsigned int data_offset = ETH_HLEN;
 680         struct qeth_hdr *hdr;
 681         int rc;
 682
 683         hdr = kmem_cache_alloc(qeth_core_header_cache, GFP_ATOMIC);
 684         if (!hdr)
 685                 return -ENOMEM;
 686         qeth_l2_fill_header(hdr, skb, cast_type, skb->len);
 687         skb_copy_from_linear_data(skb, ((char *)hdr) + sizeof(*hdr),
 688                                   data_offset);
 689
 690         if (!qeth_get_elements_no(card, skb, 1, data_offset)) {
 691                 rc = -E2BIG;
 692                 goto out;
 693         }
 694         rc = qeth_do_send_packet_fast(queue, skb, hdr, data_offset,
 695                                       sizeof(*hdr) + data_offset);
 696 out:
 697         if (rc)
 698                 kmem_cache_free(qeth_core_header_cache, hdr);
 699         return rc;
 700 }
 701
 702 static int qeth_l2_xmit_osa(struct qeth_card *card, struct sk_buff *skb,
 703                             struct qeth_qdio_out_q *queue, int cast_type)
 704 {
 705         int push_len = sizeof(struct qeth_hdr);
 706         unsigned int elements, nr_frags;
 707         unsigned int hdr_elements = 0;
 708         struct qeth_hdr *hdr = NULL;
 709         unsigned int hd_len = 0;
 710         int rc;
 711
 712         /* fix hardware limitation: as long as we do not have sbal
 713          * chaining we can not send long frag lists
 714          */
 715         if (!qeth_get_elements_no(card, skb, 0, 0)) {
 716                 rc = skb_linearize(skb);
 717
 718                 if (card->options.performance_stats) {
 719                         if (rc)
 720                                 card->perf_stats.tx_linfail++;
 721                         else
 722                                 card->perf_stats.tx_lin++;
 723                 }
 724                 if (rc)
 725                         return rc;
 726         }
 727         nr_frags = skb_shinfo(skb)->nr_frags;
 728
 729         rc = skb_cow_head(skb, push_len);
 730         if (rc)
 731                 return rc;
 732         push_len = qeth_push_hdr(skb, &hdr, push_len);
 733         if (push_len < 0)
 734                 return push_len;
 735         if (!push_len) {
 736                 /* hdr was allocated from cache */
 737                 hd_len = sizeof(*hdr);
 738                 hdr_elements = 1;
 739         }
 740         qeth_l2_fill_header(hdr, skb, cast_type, skb->len - push_len);
 741         if (skb->ip_summed == CHECKSUM_PARTIAL)
 742                 qeth_l2_hdr_csum(card, hdr, skb);
 743
 744         elements = qeth_get_elements_no(card, skb, hdr_elements, 0);
 745         if (!elements) {
 746                 rc = -E2BIG;
 747                 goto out;
 748         }
 749         elements += hdr_elements;
 750
 751         /* TODO: remove the skb_orphan() once TX completion is fast enough */
 752         skb_orphan(skb);
 753         rc = qeth_do_send_packet(card, queue, skb, hdr, 0, hd_len, elements);
 754 out:
 755         if (!rc) {
 756                 if (card->options.performance_stats && nr_frags) {
 757                         card->perf_stats.sg_skbs_sent++;
 758                         /* nr_frags + skb->data */
 759                         card->perf_stats.sg_frags_sent += nr_frags + 1;
 760                 }
 761         } else {
 762                 if (hd_len)
 763                         kmem_cache_free(qeth_core_header_cache, hdr);
 764                 if (rc == -EBUSY)
 765                         /* roll back to ETH header */
 766                         skb_pull(skb, push_len);
 767         }
 768         return rc;
 769 }
 770
 771 static int qeth_l2_xmit_osn(struct qeth_card *card, struct sk_buff *skb,
 772                             struct qeth_qdio_out_q *queue)
 773 {
 774         unsigned int elements;
 775         struct qeth_hdr *hdr;
 776
 777         if (skb->protocol == htons(ETH_P_IPV6))
 778                 return -EPROTONOSUPPORT;
 779
 780         hdr = (struct qeth_hdr *)skb->data;
 781         elements = qeth_get_elements_no(card, skb, 0, 0);
 782         if (!elements)
 783                 return -E2BIG;
 784         if (qeth_hdr_chk_and_bounce(skb, &hdr, sizeof(*hdr)))
 785                 return -EINVAL;
 786         return qeth_do_send_packet(card, queue, skb, hdr, 0, 0, elements);
 787 }
 788
 789 static netdev_tx_t qeth_l2_hard_start_xmit(struct sk_buff *skb,
 790                                            struct net_device *dev)
 791 {
 792         struct qeth_card *card = dev->ml_priv;
 793         int cast_type = qeth_l2_get_cast_type(card, skb);
 794         struct qeth_qdio_out_q *queue;
 795         int tx_bytes = skb->len;
 796         int rc;
 797
 798         if (card->qdio.do_prio_queueing || (cast_type &&
 799                                         card->info.is_multicast_different))
 800                 queue = card->qdio.out_qs[qeth_get_priority_queue(card, skb,
 801                                         qeth_get_ip_version(skb), cast_type)];
 802         else
 803                 queue = card->qdio.out_qs[card->qdio.default_out_queue];
 804
 805         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
 806                 card->stats.tx_carrier_errors++;
 807                 goto tx_drop;
 808         }
 809
 810         if (card->options.performance_stats) {
 811                 card->perf_stats.outbound_cnt++;
 812                 card->perf_stats.outbound_start_time = qeth_get_micros();
 813         }
 814         netif_stop_queue(dev);
 815
 816         switch (card->info.type) {
 817         case QETH_CARD_TYPE_OSN:
 818                 rc = qeth_l2_xmit_osn(card, skb, queue);
 819                 break;
 820         case QETH_CARD_TYPE_IQD:
 821                 rc = qeth_l2_xmit_iqd(card, skb, queue, cast_type);
 822                 break;
 823         default:
 824                 rc = qeth_l2_xmit_osa(card, skb, queue, cast_type);
 825         }
 826
 827         if (!rc) {
 828                 card->stats.tx_packets++;
 829                 card->stats.tx_bytes += tx_bytes;
 830                 if (card->options.performance_stats)
 831                         card->perf_stats.outbound_time += qeth_get_micros() -
 832                                 card->perf_stats.outbound_start_time;
 833                 netif_wake_queue(dev);
 834                 return NETDEV_TX_OK;
 835         } else if (rc == -EBUSY) {
 836                 return NETDEV_TX_BUSY;
 837         } /* else fall through */
 838
 839 tx_drop:
 840         card->stats.tx_dropped++;
 841         card->stats.tx_errors++;
 842         dev_kfree_skb_any(skb);
 843         netif_wake_queue(dev);
 844         return NETDEV_TX_OK;
 845 }
 846
 847 static int __qeth_l2_open(struct net_device *dev)
 848 {
 849         struct qeth_card *card = dev->ml_priv;
 850         int rc = 0;
 851
 852         QETH_CARD_TEXT(card, 4, "qethopen");
 853         if (card->state == CARD_STATE_UP)
 854                 return rc;
 855         if (card->state != CARD_STATE_SOFTSETUP)
 856                 return -ENODEV;
 857
 858         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
 859              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
 860                 QETH_CARD_TEXT(card, 4, "nomacadr");
 861                 return -EPERM;
 862         }
 863         card->data.state = CH_STATE_UP;
 864         card->state = CARD_STATE_UP;
 865         netif_start_queue(dev);
 866
 867         if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) {
 868                 napi_enable(&card->napi);
 869                 napi_schedule(&card->napi);
 870         } else
 871                 rc = -EIO;
 872         return rc;
 873 }
 874
 875 static int qeth_l2_open(struct net_device *dev)
 876 {
 877         struct qeth_card *card = dev->ml_priv;
 878
 879         QETH_CARD_TEXT(card, 5, "qethope_");
 880         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 881                 QETH_CARD_TEXT(card, 3, "openREC");
 882                 return -ERESTARTSYS;
 883         }
 884         return __qeth_l2_open(dev);
 885 }
 886
 887 static int qeth_l2_stop(struct net_device *dev)
 888 {
 889         struct qeth_card *card = dev->ml_priv;
 890
 891         QETH_CARD_TEXT(card, 4, "qethstop");
 892         netif_tx_disable(dev);
 893         if (card->state == CARD_STATE_UP) {
 894                 card->state = CARD_STATE_SOFTSETUP;
 895                 napi_disable(&card->napi);
 896         }
 897         return 0;
 898 }
 899
 900 static const struct device_type qeth_l2_devtype = {
 901         .name = "qeth_layer2",
 902         .groups = qeth_l2_attr_groups,
 903 };
 904
 905 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 906 {
 907         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 908         int rc;
 909
 910         if (gdev->dev.type == &qeth_generic_devtype) {
 911                 rc = qeth_l2_create_device_attributes(&gdev->dev);
 912                 if (rc)
 913                         return rc;
 914         }
 915         INIT_LIST_HEAD(&card->vid_list);
 916         hash_init(card->mac_htable);
 917         card->options.layer2 = 1;
 918         card->info.hwtrap = 0;
 919         qeth_l2_vnicc_set_defaults(card);
 920         return 0;
 921 }
 922
 923 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
 924 {
 925         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
 926
 927         if (cgdev->dev.type == &qeth_generic_devtype)
 928                 qeth_l2_remove_device_attributes(&cgdev->dev);
 929         qeth_set_allowed_threads(card, 0, 1);
 930         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 931
 932         if (cgdev->state == CCWGROUP_ONLINE)
 933                 qeth_l2_set_offline(cgdev);
 934
 935         if (card->dev) {
 936                 netif_napi_del(&card->napi);
 937                 unregister_netdev(card->dev);
 938                 card->dev = NULL;
 939         }
 940         return;
 941 }
 942
 943 static const struct ethtool_ops qeth_l2_ethtool_ops = {
 944         .get_link = ethtool_op_get_link,
 945         .get_strings = qeth_core_get_strings,
 946         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 947         .get_sset_count = qeth_core_get_sset_count,
 948         .get_drvinfo = qeth_core_get_drvinfo,
 949         .get_link_ksettings = qeth_core_ethtool_get_link_ksettings,
 950 };
 951
 952 static const struct ethtool_ops qeth_l2_osn_ops = {
 953         .get_strings = qeth_core_get_strings,
 954         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 955         .get_sset_count = qeth_core_get_sset_count,
 956         .get_drvinfo = qeth_core_get_drvinfo,
 957 };
 958
 959 static const struct net_device_ops qeth_l2_netdev_ops = {
 960         .ndo_open               = qeth_l2_open,
 961         .ndo_stop               = qeth_l2_stop,
 962         .ndo_get_stats          = qeth_get_stats,
 963         .ndo_start_xmit         = qeth_l2_hard_start_xmit,
 964         .ndo_features_check     = qeth_features_check,
 965         .ndo_validate_addr      = eth_validate_addr,
 966         .ndo_set_rx_mode        = qeth_l2_set_rx_mode,
 967         .ndo_do_ioctl           = qeth_do_ioctl,
 968         .ndo_set_mac_address    = qeth_l2_set_mac_address,
 969         .ndo_change_mtu         = qeth_change_mtu,
 970         .ndo_vlan_rx_add_vid    = qeth_l2_vlan_rx_add_vid,
 971         .ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,
 972         .ndo_tx_timeout         = qeth_tx_timeout,
 973         .ndo_fix_features       = qeth_fix_features,
 974         .ndo_set_features       = qeth_set_features
 975 };
 976
 977 static int qeth_l2_setup_netdev(struct qeth_card *card)
 978 {
 979         switch (card->info.type) {
 980         case QETH_CARD_TYPE_IQD:
 981                 card->dev = alloc_netdev(0, "hsi%d", NET_NAME_UNKNOWN,
 982                                          ether_setup);
 983                 break;
 984         case QETH_CARD_TYPE_OSN:
 985                 card->dev = alloc_netdev(0, "osn%d", NET_NAME_UNKNOWN,
 986                                          ether_setup);
 987                 break;
 988         default:
 989                 card->dev = alloc_etherdev(0);
 990         }
 991
 992         if (!card->dev)
 993                 return -ENODEV;
 994
 995         card->dev->ml_priv = card;
 996         card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
 997         card->dev->mtu = card->info.initial_mtu;
 998         card->dev->min_mtu = 64;
 999         card->dev->max_mtu = ETH_MAX_MTU;
1000         card->dev->netdev_ops = &qeth_l2_netdev_ops;
1001         if (card->info.type == QETH_CARD_TYPE_OSN) {
1002                 card->dev->ethtool_ops = &qeth_l2_osn_ops;
1003                 card->dev->flags |= IFF_NOARP;
1004         } else {
1005                 card->dev->ethtool_ops = &qeth_l2_ethtool_ops;
1006         }
1007
1008         if (card->info.type == QETH_CARD_TYPE_OSM)
1009                 card->dev->features |= NETIF_F_VLAN_CHALLENGED;
1010         else
1011                 card->dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
1012         if (card->info.type == QETH_CARD_TYPE_OSD && !card->info.guestlan) {
1013                 card->dev->hw_features = NETIF_F_SG;
1014                 card->dev->vlan_features = NETIF_F_SG;
1015                 card->dev->features |= NETIF_F_SG;
1016                 /* OSA 3S and earlier has no RX/TX support */
1017                 if (qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM)) {
1018                         card->dev->hw_features |= NETIF_F_IP_CSUM;
1019                         card->dev->vlan_features |= NETIF_F_IP_CSUM;
1020                 }
1021                 if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM)) {
1022                         card->dev->hw_features |= NETIF_F_RXCSUM;
1023                         card->dev->vlan_features |= NETIF_F_RXCSUM;
1024                 }
1025         }
1026         if (card->info.type != QETH_CARD_TYPE_OSN &&
1027             card->info.type != QETH_CARD_TYPE_IQD) {
1028                 card->dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1029                 card->dev->needed_headroom = sizeof(struct qeth_hdr);
1030         }
1031
1032         card->info.broadcast_capable = 1;
1033         qeth_l2_request_initial_mac(card);
1034         SET_NETDEV_DEV(card->dev, &card->gdev->dev);
1035         netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT);
1036         netif_carrier_off(card->dev);
1037         return register_netdev(card->dev);
1038 }
1039
1040 static int qeth_l2_start_ipassists(struct qeth_card *card)
1041 {
1042         /* configure isolation level */
1043         if (qeth_set_access_ctrl_online(card, 0))
1044                 return -ENODEV;
1045         return 0;
1046 }
1047
1048 static void qeth_l2_trace_features(struct qeth_card *card)
1049 {
1050         /* Set BridgePort features */
1051         QETH_CARD_TEXT(card, 2, "featuSBP");
1052         QETH_CARD_HEX(card, 2, &card->options.sbp.supported_funcs,
1053                       sizeof(card->options.sbp.supported_funcs));
1054         /* VNIC Characteristics features */
1055         QETH_CARD_TEXT(card, 2, "feaVNICC");
1056         QETH_CARD_HEX(card, 2, &card->options.vnicc.sup_chars,
1057                       sizeof(card->options.vnicc.sup_chars));
1058 }
1059
1060 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
1061 {
1062         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1063         int rc = 0;
1064         enum qeth_card_states recover_flag;
1065
1066         mutex_lock(&card->discipline_mutex);
1067         mutex_lock(&card->conf_mutex);
1068         QETH_DBF_TEXT(SETUP, 2, "setonlin");
1069         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1070
1071         recover_flag = card->state;
1072         rc = qeth_core_hardsetup_card(card);
1073         if (rc) {
1074                 QETH_DBF_TEXT_(SETUP, 2, "2err%04x", rc);
1075                 rc = -ENODEV;
1076                 goto out_remove;
1077         }
1078         qeth_bridgeport_query_support(card);
1079         if (card->options.sbp.supported_funcs)
1080                 dev_info(&card->gdev->dev,
1081                 "The device represents a Bridge Capable Port\n");
1082
1083         if (!card->dev && qeth_l2_setup_netdev(card)) {
1084                 rc = -ENODEV;
1085                 goto out_remove;
1086         }
1087
1088         if (card->info.type != QETH_CARD_TYPE_OSN)
1089                 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
1090
1091         if (qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP)) {
1092                 if (card->info.hwtrap &&
1093                     qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM))
1094                         card->info.hwtrap = 0;
1095         } else
1096                 card->info.hwtrap = 0;
1097
1098         /* for the rx_bcast characteristic, init VNICC after setmac */
1099         qeth_l2_vnicc_init(card);
1100
1101         qeth_trace_features(card);
1102         qeth_l2_trace_features(card);
1103
1104         qeth_l2_setup_bridgeport_attrs(card);
1105
1106         card->state = CARD_STATE_HARDSETUP;
1107         memset(&card->rx, 0, sizeof(struct qeth_rx));
1108         qeth_print_status_message(card);
1109
1110         /* softsetup */
1111         QETH_DBF_TEXT(SETUP, 2, "softsetp");
1112
1113         if ((card->info.type == QETH_CARD_TYPE_OSD) ||
1114             (card->info.type == QETH_CARD_TYPE_OSX)) {
1115                 rc = qeth_l2_start_ipassists(card);
1116                 if (rc)
1117                         goto out_remove;
1118         }
1119
1120         if (card->info.type != QETH_CARD_TYPE_OSN)
1121                 qeth_l2_process_vlans(card);
1122
1123         netif_tx_disable(card->dev);
1124
1125         rc = qeth_init_qdio_queues(card);
1126         if (rc) {
1127                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1128                 rc = -ENODEV;
1129                 goto out_remove;
1130         }
1131         card->state = CARD_STATE_SOFTSETUP;
1132         if (card->lan_online)
1133                 netif_carrier_on(card->dev);
1134         else
1135                 netif_carrier_off(card->dev);
1136
1137         qeth_set_allowed_threads(card, 0xffffffff, 0);
1138         if (recover_flag == CARD_STATE_RECOVER) {
1139                 if (recovery_mode &&
1140                     card->info.type != QETH_CARD_TYPE_OSN) {
1141                         __qeth_l2_open(card->dev);
1142                 } else {
1143                         rtnl_lock();
1144                         dev_open(card->dev);
1145                         rtnl_unlock();
1146                 }
1147                 /* this also sets saved unicast addresses */
1148                 qeth_l2_set_rx_mode(card->dev);
1149                 rtnl_lock();
1150                 qeth_recover_features(card->dev);
1151                 rtnl_unlock();
1152         }
1153         /* let user_space know that device is online */
1154         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1155         mutex_unlock(&card->conf_mutex);
1156         mutex_unlock(&card->discipline_mutex);
1157         return 0;
1158
1159 out_remove:
1160         qeth_l2_stop_card(card, 0);
1161         ccw_device_set_offline(CARD_DDEV(card));
1162         ccw_device_set_offline(CARD_WDEV(card));
1163         ccw_device_set_offline(CARD_RDEV(card));
1164         qdio_free(CARD_DDEV(card));
1165         if (recover_flag == CARD_STATE_RECOVER)
1166                 card->state = CARD_STATE_RECOVER;
1167         else
1168                 card->state = CARD_STATE_DOWN;
1169         mutex_unlock(&card->conf_mutex);
1170         mutex_unlock(&card->discipline_mutex);
1171         return rc;
1172 }
1173
1174 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1175 {
1176         return __qeth_l2_set_online(gdev, 0);
1177 }
1178
1179 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1180                                         int recovery_mode)
1181 {
1182         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1183         int rc = 0, rc2 = 0, rc3 = 0;
1184         enum qeth_card_states recover_flag;
1185
1186         mutex_lock(&card->discipline_mutex);
1187         mutex_lock(&card->conf_mutex);
1188         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1189         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1190
1191         if (card->dev && netif_carrier_ok(card->dev))
1192                 netif_carrier_off(card->dev);
1193         recover_flag = card->state;
1194         if ((!recovery_mode && card->info.hwtrap) || card->info.hwtrap == 2) {
1195                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1196                 card->info.hwtrap = 1;
1197         }
1198         qeth_l2_stop_card(card, recovery_mode);
1199         rc  = ccw_device_set_offline(CARD_DDEV(card));
1200         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1201         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1202         if (!rc)
1203                 rc = (rc2) ? rc2 : rc3;
1204         if (rc)
1205                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1206         qdio_free(CARD_DDEV(card));
1207         if (recover_flag == CARD_STATE_UP)
1208                 card->state = CARD_STATE_RECOVER;
1209         /* let user_space know that device is offline */
1210         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1211         mutex_unlock(&card->conf_mutex);
1212         mutex_unlock(&card->discipline_mutex);
1213         return 0;
1214 }
1215
1216 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1217 {
1218         return __qeth_l2_set_offline(cgdev, 0);
1219 }
1220
1221 static int qeth_l2_recover(void *ptr)
1222 {
1223         struct qeth_card *card;
1224         int rc = 0;
1225
1226         card = (struct qeth_card *) ptr;
1227         QETH_CARD_TEXT(card, 2, "recover1");
1228         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1229                 return 0;
1230         QETH_CARD_TEXT(card, 2, "recover2");
1231         dev_warn(&card->gdev->dev,
1232                 "A recovery process has been started for the device\n");
1233         qeth_set_recovery_task(card);
1234         __qeth_l2_set_offline(card->gdev, 1);
1235         rc = __qeth_l2_set_online(card->gdev, 1);
1236         if (!rc)
1237                 dev_info(&card->gdev->dev,
1238                         "Device successfully recovered!\n");
1239         else {
1240                 qeth_close_dev(card);
1241                 dev_warn(&card->gdev->dev, "The qeth device driver "
1242                                 "failed to recover an error on the device\n");
1243         }
1244         qeth_clear_recovery_task(card);
1245         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1246         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1247         return 0;
1248 }
1249
1250 static int __init qeth_l2_init(void)
1251 {
1252         pr_info("register layer 2 discipline\n");
1253         return 0;
1254 }
1255
1256 static void __exit qeth_l2_exit(void)
1257 {
1258         pr_info("unregister layer 2 discipline\n");
1259 }
1260
1261 static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev)
1262 {
1263         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1264
1265         if (card->dev)
1266                 netif_device_detach(card->dev);
1267         qeth_set_allowed_threads(card, 0, 1);
1268         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1269         if (gdev->state == CCWGROUP_OFFLINE)
1270                 return 0;
1271         if (card->state == CARD_STATE_UP) {
1272                 if (card->info.hwtrap)
1273                         qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1274                 __qeth_l2_set_offline(card->gdev, 1);
1275         } else
1276                 __qeth_l2_set_offline(card->gdev, 0);
1277         return 0;
1278 }
1279
1280 static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
1281 {
1282         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1283         int rc = 0;
1284
1285         if (gdev->state == CCWGROUP_OFFLINE)
1286                 goto out;
1287
1288         if (card->state == CARD_STATE_RECOVER) {
1289                 rc = __qeth_l2_set_online(card->gdev, 1);
1290                 if (rc) {
1291                         rtnl_lock();
1292                         dev_close(card->dev);
1293                         rtnl_unlock();
1294                 }
1295         } else
1296                 rc = __qeth_l2_set_online(card->gdev, 0);
1297 out:
1298         qeth_set_allowed_threads(card, 0xffffffff, 0);
1299         if (card->dev)
1300                 netif_device_attach(card->dev);
1301         if (rc)
1302                 dev_warn(&card->gdev->dev, "The qeth device driver "
1303                         "failed to recover an error on the device\n");
1304         return rc;
1305 }
1306
1307 /* Returns zero if the command is successfully "consumed" */
1308 static int qeth_l2_control_event(struct qeth_card *card,
1309                                         struct qeth_ipa_cmd *cmd)
1310 {
1311         switch (cmd->hdr.command) {
1312         case IPA_CMD_SETBRIDGEPORT_OSA:
1313         case IPA_CMD_SETBRIDGEPORT_IQD:
1314                 if (cmd->data.sbp.hdr.command_code ==
1315                                 IPA_SBP_BRIDGE_PORT_STATE_CHANGE) {
1316                         qeth_bridge_state_change(card, cmd);
1317                         return 0;
1318                 } else
1319                         return 1;
1320         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
1321                 qeth_bridge_host_event(card, cmd);
1322                 return 0;
1323         default:
1324                 return 1;
1325         }
1326 }
1327
1328 struct qeth_discipline qeth_l2_discipline = {
1329         .devtype = &qeth_l2_devtype,
1330         .start_poll = qeth_qdio_start_poll,
1331         .input_handler = (qdio_handler_t *) qeth_qdio_input_handler,
1332         .output_handler = (qdio_handler_t *) qeth_qdio_output_handler,
1333         .process_rx_buffer = qeth_l2_process_inbound_buffer,
1334         .recover = qeth_l2_recover,
1335         .setup = qeth_l2_probe_device,
1336         .remove = qeth_l2_remove_device,
1337         .set_online = qeth_l2_set_online,
1338         .set_offline = qeth_l2_set_offline,
1339         .freeze = qeth_l2_pm_suspend,
1340         .thaw = qeth_l2_pm_resume,
1341         .restore = qeth_l2_pm_resume,
1342         .do_ioctl = NULL,
1343         .control_event_handler = qeth_l2_control_event,
1344 };
1345 EXPORT_SYMBOL_GPL(qeth_l2_discipline);
1346
1347 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1348                            struct qeth_cmd_buffer *iob)
1349 {
1350         unsigned long flags;
1351         int rc = 0;
1352
1353         QETH_CARD_TEXT(card, 5, "osndctrd");
1354
1355         wait_event(card->wait_q,
1356                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1357         qeth_prepare_control_data(card, len, iob);
1358         QETH_CARD_TEXT(card, 6, "osnoirqp");
1359         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1360         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1361                               (addr_t) iob, 0, 0);
1362         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1363         if (rc) {
1364                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1365                            "ccw_device_start rc = %i\n", rc);
1366                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1367                 qeth_release_buffer(iob->channel, iob);
1368                 atomic_set(&card->write.irq_pending, 0);
1369                 wake_up(&card->wait_q);
1370         }
1371         return rc;
1372 }
1373
1374 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1375                         struct qeth_cmd_buffer *iob, int data_len)
1376 {
1377         u16 s1, s2;
1378
1379         QETH_CARD_TEXT(card, 4, "osndipa");
1380
1381         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1382         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1383         s2 = (u16)data_len;
1384         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1385         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1386         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1387         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1388         return qeth_osn_send_control_data(card, s1, iob);
1389 }
1390
1391 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1392 {
1393         struct qeth_cmd_buffer *iob;
1394         struct qeth_card *card;
1395         int rc;
1396
1397         if (!dev)
1398                 return -ENODEV;
1399         card = dev->ml_priv;
1400         if (!card)
1401                 return -ENODEV;
1402         QETH_CARD_TEXT(card, 2, "osnsdmc");
1403         if (!qeth_card_hw_is_reachable(card))
1404                 return -ENODEV;
1405         iob = qeth_wait_for_buffer(&card->write);
1406         memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1407         rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1408         return rc;
1409 }
1410 EXPORT_SYMBOL(qeth_osn_assist);
1411
1412 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1413                   int (*assist_cb)(struct net_device *, void *),
1414                   int (*data_cb)(struct sk_buff *))
1415 {
1416         struct qeth_card *card;
1417
1418         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1419         if (*dev == NULL)
1420                 return -ENODEV;
1421         card = (*dev)->ml_priv;
1422         if (!card)
1423                 return -ENODEV;
1424         QETH_CARD_TEXT(card, 2, "osnreg");
1425         if ((assist_cb == NULL) || (data_cb == NULL))
1426                 return -EINVAL;
1427         card->osn_info.assist_cb = assist_cb;
1428         card->osn_info.data_cb = data_cb;
1429         return 0;
1430 }
1431 EXPORT_SYMBOL(qeth_osn_register);
1432
1433 void qeth_osn_deregister(struct net_device *dev)
1434 {
1435         struct qeth_card *card;
1436
1437         if (!dev)
1438                 return;
1439         card = dev->ml_priv;
1440         if (!card)
1441                 return;
1442         QETH_CARD_TEXT(card, 2, "osndereg");
1443         card->osn_info.assist_cb = NULL;
1444         card->osn_info.data_cb = NULL;
1445         return;
1446 }
1447 EXPORT_SYMBOL(qeth_osn_deregister);
1448
1449 /* SETBRIDGEPORT support, async notifications */
1450
1451 enum qeth_an_event_type {anev_reg_unreg, anev_abort, anev_reset};
1452
1453 /**
1454  * qeth_bridge_emit_host_event() - bridgeport address change notification
1455  * @card:  qeth_card structure pointer, for udev events.
1456  * @evtype:  "normal" register/unregister, or abort, or reset. For abort
1457  *            and reset token and addr_lnid are unused and may be NULL.
1458  * @code:  event bitmask: high order bit 0x80 value 1 means removal of an
1459  *                        object, 0 - addition of an object.
1460  *                        0x01 - VLAN, 0x02 - MAC, 0x03 - VLAN and MAC.
1461  * @token: "network token" structure identifying physical address of the port.
1462  * @addr_lnid: pointer to structure with MAC address and VLAN ID.
1463  *
1464  * This function is called when registrations and deregistrations are
1465  * reported by the hardware, and also when notifications are enabled -
1466  * for all currently registered addresses.
1467  */
1468 static void qeth_bridge_emit_host_event(struct qeth_card *card,
1469         enum qeth_an_event_type evtype,
1470         u8 code, struct net_if_token *token, struct mac_addr_lnid *addr_lnid)
1471 {
1472         char str[7][32];
1473         char *env[8];
1474         int i = 0;
1475
1476         switch (evtype) {
1477         case anev_reg_unreg:
1478                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=%s",
1479                                 (code & IPA_ADDR_CHANGE_CODE_REMOVAL)
1480                                 ? "deregister" : "register");
1481                 env[i] = str[i]; i++;
1482                 if (code & IPA_ADDR_CHANGE_CODE_VLANID) {
1483                         snprintf(str[i], sizeof(str[i]), "VLAN=%d",
1484                                 addr_lnid->lnid);
1485                         env[i] = str[i]; i++;
1486                 }
1487                 if (code & IPA_ADDR_CHANGE_CODE_MACADDR) {
1488                         snprintf(str[i], sizeof(str[i]), "MAC=%pM",
1489                                 addr_lnid->mac);
1490                         env[i] = str[i]; i++;
1491                 }
1492                 snprintf(str[i], sizeof(str[i]), "NTOK_BUSID=%x.%x.%04x",
1493                         token->cssid, token->ssid, token->devnum);
1494                 env[i] = str[i]; i++;
1495                 snprintf(str[i], sizeof(str[i]), "NTOK_IID=%02x", token->iid);
1496                 env[i] = str[i]; i++;
1497                 snprintf(str[i], sizeof(str[i]), "NTOK_CHPID=%02x",
1498                                 token->chpid);
1499                 env[i] = str[i]; i++;
1500                 snprintf(str[i], sizeof(str[i]), "NTOK_CHID=%04x", token->chid);
1501                 env[i] = str[i]; i++;
1502                 break;
1503         case anev_abort:
1504                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=abort");
1505                 env[i] = str[i]; i++;
1506                 break;
1507         case anev_reset:
1508                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=reset");
1509                 env[i] = str[i]; i++;
1510                 break;
1511         }
1512         env[i] = NULL;
1513         kobject_uevent_env(&card->gdev->dev.kobj, KOBJ_CHANGE, env);
1514 }
1515
1516 struct qeth_bridge_state_data {
1517         struct work_struct worker;
1518         struct qeth_card *card;
1519         struct qeth_sbp_state_change qports;
1520 };
1521
1522 static void qeth_bridge_state_change_worker(struct work_struct *work)
1523 {
1524         struct qeth_bridge_state_data *data =
1525                 container_of(work, struct qeth_bridge_state_data, worker);
1526         /* We are only interested in the first entry - local port */
1527         struct qeth_sbp_port_entry *entry = &data->qports.entry[0];
1528         char env_locrem[32];
1529         char env_role[32];
1530         char env_state[32];
1531         char *env[] = {
1532                 env_locrem,
1533                 env_role,
1534                 env_state,
1535                 NULL
1536         };
1537
1538         /* Role should not change by itself, but if it did, */
1539         /* information from the hardware is authoritative.  */
1540         mutex_lock(&data->card->conf_mutex);
1541         data->card->options.sbp.role = entry->role;
1542         mutex_unlock(&data->card->conf_mutex);
1543
1544         snprintf(env_locrem, sizeof(env_locrem), "BRIDGEPORT=statechange");
1545         snprintf(env_role, sizeof(env_role), "ROLE=%s",
1546                 (entry->role == QETH_SBP_ROLE_NONE) ? "none" :
1547                 (entry->role == QETH_SBP_ROLE_PRIMARY) ? "primary" :
1548                 (entry->role == QETH_SBP_ROLE_SECONDARY) ? "secondary" :
1549                 "<INVALID>");
1550         snprintf(env_state, sizeof(env_state), "STATE=%s",
1551                 (entry->state == QETH_SBP_STATE_INACTIVE) ? "inactive" :
1552                 (entry->state == QETH_SBP_STATE_STANDBY) ? "standby" :
1553                 (entry->state == QETH_SBP_STATE_ACTIVE) ? "active" :
1554                 "<INVALID>");
1555         kobject_uevent_env(&data->card->gdev->dev.kobj,
1556                                 KOBJ_CHANGE, env);
1557         kfree(data);
1558 }
1559
1560 static void qeth_bridge_state_change(struct qeth_card *card,
1561                                         struct qeth_ipa_cmd *cmd)
1562 {
1563         struct qeth_sbp_state_change *qports =
1564                  &cmd->data.sbp.data.state_change;
1565         struct qeth_bridge_state_data *data;
1566         int extrasize;
1567
1568         QETH_CARD_TEXT(card, 2, "brstchng");
1569         if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1570                 QETH_CARD_TEXT_(card, 2, "BPsz%04x", qports->entry_length);
1571                 return;
1572         }
1573         extrasize = sizeof(struct qeth_sbp_port_entry) * qports->num_entries;
1574         data = kzalloc(sizeof(struct qeth_bridge_state_data) + extrasize,
1575                 GFP_ATOMIC);
1576         if (!data) {
1577                 QETH_CARD_TEXT(card, 2, "BPSalloc");
1578                 return;
1579         }
1580         INIT_WORK(&data->worker, qeth_bridge_state_change_worker);
1581         data->card = card;
1582         memcpy(&data->qports, qports,
1583                         sizeof(struct qeth_sbp_state_change) + extrasize);
1584         queue_work(qeth_wq, &data->worker);
1585 }
1586
1587 struct qeth_bridge_host_data {
1588         struct work_struct worker;
1589         struct qeth_card *card;
1590         struct qeth_ipacmd_addr_change hostevs;
1591 };
1592
1593 static void qeth_bridge_host_event_worker(struct work_struct *work)
1594 {
1595         struct qeth_bridge_host_data *data =
1596                 container_of(work, struct qeth_bridge_host_data, worker);
1597         int i;
1598
1599         if (data->hostevs.lost_event_mask) {
1600                 dev_info(&data->card->gdev->dev,
1601 "Address notification from the Bridge Port stopped %s (%s)\n",
1602                         data->card->dev->name,
1603                         (data->hostevs.lost_event_mask == 0x01)
1604                         ? "Overflow"
1605                         : (data->hostevs.lost_event_mask == 0x02)
1606                         ? "Bridge port state change"
1607                         : "Unknown reason");
1608                 mutex_lock(&data->card->conf_mutex);
1609                 data->card->options.sbp.hostnotification = 0;
1610                 mutex_unlock(&data->card->conf_mutex);
1611                 qeth_bridge_emit_host_event(data->card, anev_abort,
1612                         0, NULL, NULL);
1613         } else
1614                 for (i = 0; i < data->hostevs.num_entries; i++) {
1615                         struct qeth_ipacmd_addr_change_entry *entry =
1616                                         &data->hostevs.entry[i];
1617                         qeth_bridge_emit_host_event(data->card,
1618                                         anev_reg_unreg,
1619                                         entry->change_code,
1620                                         &entry->token, &entry->addr_lnid);
1621                 }
1622         kfree(data);
1623 }
1624
1625 static void qeth_bridge_host_event(struct qeth_card *card,
1626                                         struct qeth_ipa_cmd *cmd)
1627 {
1628         struct qeth_ipacmd_addr_change *hostevs =
1629                  &cmd->data.addrchange;
1630         struct qeth_bridge_host_data *data;
1631         int extrasize;
1632
1633         QETH_CARD_TEXT(card, 2, "brhostev");
1634         if (cmd->hdr.return_code != 0x0000) {
1635                 if (cmd->hdr.return_code == 0x0010) {
1636                         if (hostevs->lost_event_mask == 0x00)
1637                                 hostevs->lost_event_mask = 0xff;
1638                 } else {
1639                         QETH_CARD_TEXT_(card, 2, "BPHe%04x",
1640                                 cmd->hdr.return_code);
1641                         return;
1642                 }
1643         }
1644         extrasize = sizeof(struct qeth_ipacmd_addr_change_entry) *
1645                                                 hostevs->num_entries;
1646         data = kzalloc(sizeof(struct qeth_bridge_host_data) + extrasize,
1647                 GFP_ATOMIC);
1648         if (!data) {
1649                 QETH_CARD_TEXT(card, 2, "BPHalloc");
1650                 return;
1651         }
1652         INIT_WORK(&data->worker, qeth_bridge_host_event_worker);
1653         data->card = card;
1654         memcpy(&data->hostevs, hostevs,
1655                         sizeof(struct qeth_ipacmd_addr_change) + extrasize);
1656         queue_work(qeth_wq, &data->worker);
1657 }
1658
1659 /* SETBRIDGEPORT support; sending commands */
1660
1661 struct _qeth_sbp_cbctl {
1662         u16 ipa_rc;
1663         u16 cmd_rc;
1664         union {
1665                 u32 supported;
1666                 struct {
1667                         enum qeth_sbp_roles *role;
1668                         enum qeth_sbp_states *state;
1669                 } qports;
1670         } data;
1671 };
1672
1673 /**
1674  * qeth_bridgeport_makerc() - derive "traditional" error from hardware codes.
1675  * @card:                     qeth_card structure pointer, for debug messages.
1676  * @cbctl:                    state structure with hardware return codes.
1677  * @setcmd:                   IPA command code
1678  *
1679  * Returns negative errno-compatible error indication or 0 on success.
1680  */
1681 static int qeth_bridgeport_makerc(struct qeth_card *card,
1682         struct _qeth_sbp_cbctl *cbctl, enum qeth_ipa_sbp_cmd setcmd)
1683 {
1684         int rc;
1685         int is_iqd = (card->info.type == QETH_CARD_TYPE_IQD);
1686
1687         if ((is_iqd && (cbctl->ipa_rc == IPA_RC_SUCCESS)) ||
1688             (!is_iqd && (cbctl->ipa_rc == cbctl->cmd_rc)))
1689                 switch (cbctl->cmd_rc) {
1690                 case IPA_RC_SUCCESS:
1691                         rc = 0;
1692                         break;
1693                 case IPA_RC_L2_UNSUPPORTED_CMD:
1694                 case IPA_RC_UNSUPPORTED_COMMAND:
1695                         rc = -EOPNOTSUPP;
1696                         break;
1697                 case IPA_RC_SBP_OSA_NOT_CONFIGURED:
1698                 case IPA_RC_SBP_IQD_NOT_CONFIGURED:
1699                         rc = -ENODEV; /* maybe not the best code here? */
1700                         dev_err(&card->gdev->dev,
1701         "The device is not configured as a Bridge Port\n");
1702                         break;
1703                 case IPA_RC_SBP_OSA_OS_MISMATCH:
1704                 case IPA_RC_SBP_IQD_OS_MISMATCH:
1705                         rc = -EPERM;
1706                         dev_err(&card->gdev->dev,
1707         "A Bridge Port is already configured by a different operating system\n");
1708                         break;
1709                 case IPA_RC_SBP_OSA_ANO_DEV_PRIMARY:
1710                 case IPA_RC_SBP_IQD_ANO_DEV_PRIMARY:
1711                         switch (setcmd) {
1712                         case IPA_SBP_SET_PRIMARY_BRIDGE_PORT:
1713                                 rc = -EEXIST;
1714                                 dev_err(&card->gdev->dev,
1715         "The LAN already has a primary Bridge Port\n");
1716                                 break;
1717                         case IPA_SBP_SET_SECONDARY_BRIDGE_PORT:
1718                                 rc = -EBUSY;
1719                                 dev_err(&card->gdev->dev,
1720         "The device is already a primary Bridge Port\n");
1721                                 break;
1722                         default:
1723                                 rc = -EIO;
1724                         }
1725                         break;
1726                 case IPA_RC_SBP_OSA_CURRENT_SECOND:
1727                 case IPA_RC_SBP_IQD_CURRENT_SECOND:
1728                         rc = -EBUSY;
1729                         dev_err(&card->gdev->dev,
1730         "The device is already a secondary Bridge Port\n");
1731                         break;
1732                 case IPA_RC_SBP_OSA_LIMIT_SECOND:
1733                 case IPA_RC_SBP_IQD_LIMIT_SECOND:
1734                         rc = -EEXIST;
1735                         dev_err(&card->gdev->dev,
1736         "The LAN cannot have more secondary Bridge Ports\n");
1737                         break;
1738                 case IPA_RC_SBP_OSA_CURRENT_PRIMARY:
1739                 case IPA_RC_SBP_IQD_CURRENT_PRIMARY:
1740                         rc = -EBUSY;
1741                         dev_err(&card->gdev->dev,
1742         "The device is already a primary Bridge Port\n");
1743                         break;
1744                 case IPA_RC_SBP_OSA_NOT_AUTHD_BY_ZMAN:
1745                 case IPA_RC_SBP_IQD_NOT_AUTHD_BY_ZMAN:
1746                         rc = -EACCES;
1747                         dev_err(&card->gdev->dev,
1748         "The device is not authorized to be a Bridge Port\n");
1749                         break;
1750                 default:
1751                         rc = -EIO;
1752                 }
1753         else
1754                 switch (cbctl->ipa_rc) {
1755                 case IPA_RC_NOTSUPP:
1756                         rc = -EOPNOTSUPP;
1757                         break;
1758                 case IPA_RC_UNSUPPORTED_COMMAND:
1759                         rc = -EOPNOTSUPP;
1760                         break;
1761                 default:
1762                         rc = -EIO;
1763                 }
1764
1765         if (rc) {
1766                 QETH_CARD_TEXT_(card, 2, "SBPi%04x", cbctl->ipa_rc);
1767                 QETH_CARD_TEXT_(card, 2, "SBPc%04x", cbctl->cmd_rc);
1768         }
1769         return rc;
1770 }
1771
1772 static struct qeth_cmd_buffer *qeth_sbp_build_cmd(struct qeth_card *card,
1773                                                   enum qeth_ipa_sbp_cmd sbp_cmd,
1774                                                   unsigned int cmd_length)
1775 {
1776         enum qeth_ipa_cmds ipa_cmd = (card->info.type == QETH_CARD_TYPE_IQD) ?
1777                                         IPA_CMD_SETBRIDGEPORT_IQD :
1778                                         IPA_CMD_SETBRIDGEPORT_OSA;
1779         struct qeth_cmd_buffer *iob;
1780         struct qeth_ipa_cmd *cmd;
1781
1782         iob = qeth_get_ipacmd_buffer(card, ipa_cmd, 0);
1783         if (!iob)
1784                 return iob;
1785         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
1786         cmd->data.sbp.hdr.cmdlength = sizeof(struct qeth_ipacmd_sbp_hdr) +
1787                                       cmd_length;
1788         cmd->data.sbp.hdr.command_code = sbp_cmd;
1789         cmd->data.sbp.hdr.used_total = 1;
1790         cmd->data.sbp.hdr.seq_no = 1;
1791         return iob;
1792 }
1793
1794 static int qeth_bridgeport_query_support_cb(struct qeth_card *card,
1795         struct qeth_reply *reply, unsigned long data)
1796 {
1797         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1798         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1799         QETH_CARD_TEXT(card, 2, "brqsupcb");
1800         cbctl->ipa_rc = cmd->hdr.return_code;
1801         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1802         if ((cbctl->ipa_rc == 0) && (cbctl->cmd_rc == 0)) {
1803                 cbctl->data.supported =
1804                         cmd->data.sbp.data.query_cmds_supp.supported_cmds;
1805         } else {
1806                 cbctl->data.supported = 0;
1807         }
1808         return 0;
1809 }
1810
1811 /**
1812  * qeth_bridgeport_query_support() - store bitmask of supported subfunctions.
1813  * @card:                            qeth_card structure pointer.
1814  *
1815  * Sets bitmask of supported setbridgeport subfunctions in the qeth_card
1816  * strucutre: card->options.sbp.supported_funcs.
1817  */
1818 static void qeth_bridgeport_query_support(struct qeth_card *card)
1819 {
1820         struct qeth_cmd_buffer *iob;
1821         struct _qeth_sbp_cbctl cbctl;
1822
1823         QETH_CARD_TEXT(card, 2, "brqsuppo");
1824         iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_COMMANDS_SUPPORTED,
1825                                  sizeof(struct qeth_sbp_query_cmds_supp));
1826         if (!iob)
1827                 return;
1828         if (qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_support_cb,
1829                                                         (void *)&cbctl) ||
1830             qeth_bridgeport_makerc(card, &cbctl,
1831                                         IPA_SBP_QUERY_COMMANDS_SUPPORTED)) {
1832                 /* non-zero makerc signifies failure, and produce messages */
1833                 card->options.sbp.role = QETH_SBP_ROLE_NONE;
1834                 return;
1835         }
1836         card->options.sbp.supported_funcs = cbctl.data.supported;
1837 }
1838
1839 static int qeth_bridgeport_query_ports_cb(struct qeth_card *card,
1840         struct qeth_reply *reply, unsigned long data)
1841 {
1842         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1843         struct qeth_sbp_query_ports *qports = &cmd->data.sbp.data.query_ports;
1844         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1845
1846         QETH_CARD_TEXT(card, 2, "brqprtcb");
1847         cbctl->ipa_rc = cmd->hdr.return_code;
1848         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1849         if ((cbctl->ipa_rc != 0) || (cbctl->cmd_rc != 0))
1850                 return 0;
1851         if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1852                 cbctl->cmd_rc = 0xffff;
1853                 QETH_CARD_TEXT_(card, 2, "SBPs%04x", qports->entry_length);
1854                 return 0;
1855         }
1856         /* first entry contains the state of the local port */
1857         if (qports->num_entries > 0) {
1858                 if (cbctl->data.qports.role)
1859                         *cbctl->data.qports.role = qports->entry[0].role;
1860                 if (cbctl->data.qports.state)
1861                         *cbctl->data.qports.state = qports->entry[0].state;
1862         }
1863         return 0;
1864 }
1865
1866 /**
1867  * qeth_bridgeport_query_ports() - query local bridgeport status.
1868  * @card:                          qeth_card structure pointer.
1869  * @role:   Role of the port: 0-none, 1-primary, 2-secondary.
1870  * @state:  State of the port: 0-inactive, 1-standby, 2-active.
1871  *
1872  * Returns negative errno-compatible error indication or 0 on success.
1873  *
1874  * 'role' and 'state' are not updated in case of hardware operation failure.
1875  */
1876 int qeth_bridgeport_query_ports(struct qeth_card *card,
1877         enum qeth_sbp_roles *role, enum qeth_sbp_states *state)
1878 {
1879         int rc = 0;
1880         struct qeth_cmd_buffer *iob;
1881         struct _qeth_sbp_cbctl cbctl = {
1882                 .data = {
1883                         .qports = {
1884                                 .role = role,
1885                                 .state = state,
1886                         },
1887                 },
1888         };
1889
1890         QETH_CARD_TEXT(card, 2, "brqports");
1891         if (!(card->options.sbp.supported_funcs & IPA_SBP_QUERY_BRIDGE_PORTS))
1892                 return -EOPNOTSUPP;
1893         iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_BRIDGE_PORTS, 0);
1894         if (!iob)
1895                 return -ENOMEM;
1896         rc = qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_ports_cb,
1897                                 (void *)&cbctl);
1898         if (rc < 0)
1899                 return rc;
1900         return qeth_bridgeport_makerc(card, &cbctl, IPA_SBP_QUERY_BRIDGE_PORTS);
1901 }
1902 EXPORT_SYMBOL_GPL(qeth_bridgeport_query_ports);
1903
1904 static int qeth_bridgeport_set_cb(struct qeth_card *card,
1905         struct qeth_reply *reply, unsigned long data)
1906 {
1907         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
1908         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1909         QETH_CARD_TEXT(card, 2, "brsetrcb");
1910         cbctl->ipa_rc = cmd->hdr.return_code;
1911         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1912         return 0;
1913 }
1914
1915 /**
1916  * qeth_bridgeport_setrole() - Assign primary role to the port.
1917  * @card:                      qeth_card structure pointer.
1918  * @role:                      Role to assign.
1919  *
1920  * Returns negative errno-compatible error indication or 0 on success.
1921  */
1922 int qeth_bridgeport_setrole(struct qeth_card *card, enum qeth_sbp_roles role)
1923 {
1924         int rc = 0;
1925         int cmdlength;
1926         struct qeth_cmd_buffer *iob;
1927         struct _qeth_sbp_cbctl cbctl;
1928         enum qeth_ipa_sbp_cmd setcmd;
1929
1930         QETH_CARD_TEXT(card, 2, "brsetrol");
1931         switch (role) {
1932         case QETH_SBP_ROLE_NONE:
1933                 setcmd = IPA_SBP_RESET_BRIDGE_PORT_ROLE;
1934                 cmdlength = sizeof(struct qeth_sbp_reset_role);
1935                 break;
1936         case QETH_SBP_ROLE_PRIMARY:
1937                 setcmd = IPA_SBP_SET_PRIMARY_BRIDGE_PORT;
1938                 cmdlength = sizeof(struct qeth_sbp_set_primary);
1939                 break;
1940         case QETH_SBP_ROLE_SECONDARY:
1941                 setcmd = IPA_SBP_SET_SECONDARY_BRIDGE_PORT;
1942                 cmdlength = sizeof(struct qeth_sbp_set_secondary);
1943                 break;
1944         default:
1945                 return -EINVAL;
1946         }
1947         if (!(card->options.sbp.supported_funcs & setcmd))
1948                 return -EOPNOTSUPP;
1949         iob = qeth_sbp_build_cmd(card, setcmd, cmdlength);
1950         if (!iob)
1951                 return -ENOMEM;
1952         rc = qeth_send_ipa_cmd(card, iob, qeth_bridgeport_set_cb,
1953                                 (void *)&cbctl);
1954         if (rc < 0)
1955                 return rc;
1956         return qeth_bridgeport_makerc(card, &cbctl, setcmd);
1957 }
1958
1959 /**
1960  * qeth_anset_makerc() - derive "traditional" error from hardware codes.
1961  * @card:                     qeth_card structure pointer, for debug messages.
1962  *
1963  * Returns negative errno-compatible error indication or 0 on success.
1964  */
1965 static int qeth_anset_makerc(struct qeth_card *card, int pnso_rc, u16 response)
1966 {
1967         int rc;
1968
1969         if (pnso_rc == 0)
1970                 switch (response) {
1971                 case 0x0001:
1972                         rc = 0;
1973                         break;
1974                 case 0x0004:
1975                 case 0x0100:
1976                 case 0x0106:
1977                         rc = -EOPNOTSUPP;
1978                         dev_err(&card->gdev->dev,
1979                                 "Setting address notification failed\n");
1980                         break;
1981                 case 0x0107:
1982                         rc = -EAGAIN;
1983                         break;
1984                 default:
1985                         rc = -EIO;
1986                 }
1987         else
1988                 rc = -EIO;
1989
1990         if (rc) {
1991                 QETH_CARD_TEXT_(card, 2, "SBPp%04x", pnso_rc);
1992                 QETH_CARD_TEXT_(card, 2, "SBPr%04x", response);
1993         }
1994         return rc;
1995 }
1996
1997 static void qeth_bridgeport_an_set_cb(void *priv,
1998                 enum qdio_brinfo_entry_type type, void *entry)
1999 {
2000         struct qeth_card *card = (struct qeth_card *)priv;
2001         struct qdio_brinfo_entry_l2 *l2entry;
2002         u8 code;
2003
2004         if (type != l2_addr_lnid) {
2005                 WARN_ON_ONCE(1);
2006                 return;
2007         }
2008
2009         l2entry = (struct qdio_brinfo_entry_l2 *)entry;
2010         code = IPA_ADDR_CHANGE_CODE_MACADDR;
2011         if (l2entry->addr_lnid.lnid)
2012                 code |= IPA_ADDR_CHANGE_CODE_VLANID;
2013         qeth_bridge_emit_host_event(card, anev_reg_unreg, code,
2014                 (struct net_if_token *)&l2entry->nit,
2015                 (struct mac_addr_lnid *)&l2entry->addr_lnid);
2016 }
2017
2018 /**
2019  * qeth_bridgeport_an_set() - Enable or disable bridgeport address notification
2020  * @card:                     qeth_card structure pointer.
2021  * @enable:                   0 - disable, non-zero - enable notifications
2022  *
2023  * Returns negative errno-compatible error indication or 0 on success.
2024  *
2025  * On enable, emits a series of address notifications udev events for all
2026  * currently registered hosts.
2027  */
2028 int qeth_bridgeport_an_set(struct qeth_card *card, int enable)
2029 {
2030         int rc;
2031         u16 response;
2032         struct ccw_device *ddev;
2033         struct subchannel_id schid;
2034
2035         if (!card)
2036                 return -EINVAL;
2037         if (!card->options.sbp.supported_funcs)
2038                 return -EOPNOTSUPP;
2039         ddev = CARD_DDEV(card);
2040         ccw_device_get_schid(ddev, &schid);
2041
2042         if (enable) {
2043                 qeth_bridge_emit_host_event(card, anev_reset, 0, NULL, NULL);
2044                 rc = qdio_pnso_brinfo(schid, 1, &response,
2045                         qeth_bridgeport_an_set_cb, card);
2046         } else
2047                 rc = qdio_pnso_brinfo(schid, 0, &response, NULL, NULL);
2048         return qeth_anset_makerc(card, rc, response);
2049 }
2050 EXPORT_SYMBOL_GPL(qeth_bridgeport_an_set);
2051
2052 static bool qeth_bridgeport_is_in_use(struct qeth_card *card)
2053 {
2054         return (card->options.sbp.role || card->options.sbp.reflect_promisc ||
2055                 card->options.sbp.hostnotification);
2056 }
2057
2058 /* VNIC Characteristics support */
2059
2060 /* handle VNICC IPA command return codes; convert to error codes */
2061 static int qeth_l2_vnicc_makerc(struct qeth_card *card, int ipa_rc)
2062 {
2063         int rc;
2064
2065         switch (ipa_rc) {
2066         case IPA_RC_SUCCESS:
2067                 return ipa_rc;
2068         case IPA_RC_L2_UNSUPPORTED_CMD:
2069         case IPA_RC_NOTSUPP:
2070                 rc = -EOPNOTSUPP;
2071                 break;
2072         case IPA_RC_VNICC_OOSEQ:
2073                 rc = -EALREADY;
2074                 break;
2075         case IPA_RC_VNICC_VNICBP:
2076                 rc = -EBUSY;
2077                 break;
2078         case IPA_RC_L2_ADDR_TABLE_FULL:
2079                 rc = -ENOSPC;
2080                 break;
2081         case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
2082                 rc = -EACCES;
2083                 break;
2084         default:
2085                 rc = -EIO;
2086         }
2087
2088         QETH_CARD_TEXT_(card, 2, "err%04x", ipa_rc);
2089         return rc;
2090 }
2091
2092 /* generic VNICC request call back control */
2093 struct _qeth_l2_vnicc_request_cbctl {
2094         u32 sub_cmd;
2095         struct {
2096                 u32 vnic_char;
2097                 u32 timeout;
2098         } param;
2099         struct {
2100                 union{
2101                         u32 *sup_cmds;
2102                         u32 *timeout;
2103                 };
2104         } result;
2105 };
2106
2107 /* generic VNICC request call back */
2108 static int qeth_l2_vnicc_request_cb(struct qeth_card *card,
2109                                     struct qeth_reply *reply,
2110                                     unsigned long data)
2111 {
2112         struct _qeth_l2_vnicc_request_cbctl *cbctl =
2113                 (struct _qeth_l2_vnicc_request_cbctl *) reply->param;
2114         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2115         struct qeth_ipacmd_vnicc *rep = &cmd->data.vnicc;
2116
2117         QETH_CARD_TEXT(card, 2, "vniccrcb");
2118         if (cmd->hdr.return_code)
2119                 return 0;
2120         /* return results to caller */
2121         card->options.vnicc.sup_chars = rep->hdr.sup;
2122         card->options.vnicc.cur_chars = rep->hdr.cur;
2123
2124         if (cbctl->sub_cmd == IPA_VNICC_QUERY_CMDS)
2125                 *cbctl->result.sup_cmds = rep->query_cmds.sup_cmds;
2126
2127         if (cbctl->sub_cmd == IPA_VNICC_GET_TIMEOUT)
2128                 *cbctl->result.timeout = rep->getset_timeout.timeout;
2129
2130         return 0;
2131 }
2132
2133 /* generic VNICC request */
2134 static int qeth_l2_vnicc_request(struct qeth_card *card,
2135                                  struct _qeth_l2_vnicc_request_cbctl *cbctl)
2136 {
2137         struct qeth_ipacmd_vnicc *req;
2138         struct qeth_cmd_buffer *iob;
2139         struct qeth_ipa_cmd *cmd;
2140         int rc;
2141
2142         QETH_CARD_TEXT(card, 2, "vniccreq");
2143
2144         /* get new buffer for request */
2145         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_VNICC, 0);
2146         if (!iob)
2147                 return -ENOMEM;
2148
2149         /* create header for request */
2150         cmd = (struct qeth_ipa_cmd *)(iob->data + IPA_PDU_HEADER_SIZE);
2151         req = &cmd->data.vnicc;
2152
2153         /* create sub command header for request */
2154         req->sub_hdr.data_length = sizeof(req->sub_hdr);
2155         req->sub_hdr.sub_command = cbctl->sub_cmd;
2156
2157         /* create sub command specific request fields */
2158         switch (cbctl->sub_cmd) {
2159         case IPA_VNICC_QUERY_CHARS:
2160                 break;
2161         case IPA_VNICC_QUERY_CMDS:
2162                 req->sub_hdr.data_length += sizeof(req->query_cmds);
2163                 req->query_cmds.vnic_char = cbctl->param.vnic_char;
2164                 break;
2165         case IPA_VNICC_ENABLE:
2166         case IPA_VNICC_DISABLE:
2167                 req->sub_hdr.data_length += sizeof(req->set_char);
2168                 req->set_char.vnic_char = cbctl->param.vnic_char;
2169                 break;
2170         case IPA_VNICC_SET_TIMEOUT:
2171                 req->getset_timeout.timeout = cbctl->param.timeout;
2172                 /* fallthrough */
2173         case IPA_VNICC_GET_TIMEOUT:
2174                 req->sub_hdr.data_length += sizeof(req->getset_timeout);
2175                 req->getset_timeout.vnic_char = cbctl->param.vnic_char;
2176                 break;
2177         default:
2178                 qeth_release_buffer(iob->channel, iob);
2179                 return -EOPNOTSUPP;
2180         }
2181
2182         /* send request */
2183         rc = qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb,
2184                                (void *) cbctl);
2185
2186         return qeth_l2_vnicc_makerc(card, rc);
2187 }
2188
2189 /* VNICC query VNIC characteristics request */
2190 static int qeth_l2_vnicc_query_chars(struct qeth_card *card)
2191 {
2192         struct _qeth_l2_vnicc_request_cbctl cbctl;
2193
2194         /* prepare callback control */
2195         cbctl.sub_cmd = IPA_VNICC_QUERY_CHARS;
2196
2197         QETH_CARD_TEXT(card, 2, "vniccqch");
2198         return qeth_l2_vnicc_request(card, &cbctl);
2199 }
2200
2201 /* VNICC query sub commands request */
2202 static int qeth_l2_vnicc_query_cmds(struct qeth_card *card, u32 vnic_char,
2203                                     u32 *sup_cmds)
2204 {
2205         struct _qeth_l2_vnicc_request_cbctl cbctl;
2206
2207         /* prepare callback control */
2208         cbctl.sub_cmd = IPA_VNICC_QUERY_CMDS;
2209         cbctl.param.vnic_char = vnic_char;
2210         cbctl.result.sup_cmds = sup_cmds;
2211
2212         QETH_CARD_TEXT(card, 2, "vniccqcm");
2213         return qeth_l2_vnicc_request(card, &cbctl);
2214 }
2215
2216 /* VNICC enable/disable characteristic request */
2217 static int qeth_l2_vnicc_set_char(struct qeth_card *card, u32 vnic_char,
2218                                       u32 cmd)
2219 {
2220         struct _qeth_l2_vnicc_request_cbctl cbctl;
2221
2222         /* prepare callback control */
2223         cbctl.sub_cmd = cmd;
2224         cbctl.param.vnic_char = vnic_char;
2225
2226         QETH_CARD_TEXT(card, 2, "vniccedc");
2227         return qeth_l2_vnicc_request(card, &cbctl);
2228 }
2229
2230 /* VNICC get/set timeout for characteristic request */
2231 static int qeth_l2_vnicc_getset_timeout(struct qeth_card *card, u32 vnicc,
2232                                         u32 cmd, u32 *timeout)
2233 {
2234         struct _qeth_l2_vnicc_request_cbctl cbctl;
2235
2236         /* prepare callback control */
2237         cbctl.sub_cmd = cmd;
2238         cbctl.param.vnic_char = vnicc;
2239         if (cmd == IPA_VNICC_SET_TIMEOUT)
2240                 cbctl.param.timeout = *timeout;
2241         if (cmd == IPA_VNICC_GET_TIMEOUT)
2242                 cbctl.result.timeout = timeout;
2243
2244         QETH_CARD_TEXT(card, 2, "vniccgst");
2245         return qeth_l2_vnicc_request(card, &cbctl);
2246 }
2247
2248 /* set current VNICC flag state; called from sysfs store function */
2249 int qeth_l2_vnicc_set_state(struct qeth_card *card, u32 vnicc, bool state)
2250 {
2251         int rc = 0;
2252         u32 cmd;
2253
2254         QETH_CARD_TEXT(card, 2, "vniccsch");
2255
2256         /* do not change anything if BridgePort is enabled */
2257         if (qeth_bridgeport_is_in_use(card))
2258                 return -EBUSY;
2259
2260         /* check if characteristic and enable/disable are supported */
2261         if (!(card->options.vnicc.sup_chars & vnicc) ||
2262             !(card->options.vnicc.set_char_sup & vnicc))
2263                 return -EOPNOTSUPP;
2264
2265         /* set enable/disable command and store wanted characteristic */
2266         if (state) {
2267                 cmd = IPA_VNICC_ENABLE;
2268                 card->options.vnicc.wanted_chars |= vnicc;
2269         } else {
2270                 cmd = IPA_VNICC_DISABLE;
2271                 card->options.vnicc.wanted_chars &= ~vnicc;
2272         }
2273
2274         /* do we need to do anything? */
2275         if (card->options.vnicc.cur_chars == card->options.vnicc.wanted_chars)
2276                 return rc;
2277
2278         /* if card is not ready, simply stop here */
2279         if (!qeth_card_hw_is_reachable(card)) {
2280                 if (state)
2281                         card->options.vnicc.cur_chars |= vnicc;
2282                 else
2283                         card->options.vnicc.cur_chars &= ~vnicc;
2284                 return rc;
2285         }
2286
2287         rc = qeth_l2_vnicc_set_char(card, vnicc, cmd);
2288         if (rc)
2289                 card->options.vnicc.wanted_chars =
2290                         card->options.vnicc.cur_chars;
2291         else {
2292                 /* successful online VNICC change; handle special cases */
2293                 if (state && vnicc == QETH_VNICC_RX_BCAST)
2294                         card->options.vnicc.rx_bcast_enabled = true;
2295                 if (!state && vnicc == QETH_VNICC_LEARNING)
2296                         qeth_l2_vnicc_recover_timeout(card, vnicc,
2297                                         &card->options.vnicc.learning_timeout);
2298         }
2299
2300         return rc;
2301 }
2302
2303 /* get current VNICC flag state; called from sysfs show function */
2304 int qeth_l2_vnicc_get_state(struct qeth_card *card, u32 vnicc, bool *state)
2305 {
2306         int rc = 0;
2307
2308         QETH_CARD_TEXT(card, 2, "vniccgch");
2309
2310         /* do not get anything if BridgePort is enabled */
2311         if (qeth_bridgeport_is_in_use(card))
2312                 return -EBUSY;
2313
2314         /* check if characteristic is supported */
2315         if (!(card->options.vnicc.sup_chars & vnicc))
2316                 return -EOPNOTSUPP;
2317
2318         /* if card is ready, query current VNICC state */
2319         if (qeth_card_hw_is_reachable(card))
2320                 rc = qeth_l2_vnicc_query_chars(card);
2321
2322         *state = (card->options.vnicc.cur_chars & vnicc) ? true : false;
2323         return rc;
2324 }
2325
2326 /* set VNICC timeout; called from sysfs store function. Currently, only learning
2327  * supports timeout
2328  */
2329 int qeth_l2_vnicc_set_timeout(struct qeth_card *card, u32 timeout)
2330 {
2331         int rc = 0;
2332
2333         QETH_CARD_TEXT(card, 2, "vniccsto");
2334
2335         /* do not change anything if BridgePort is enabled */
2336         if (qeth_bridgeport_is_in_use(card))
2337                 return -EBUSY;
2338
2339         /* check if characteristic and set_timeout are supported */
2340         if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
2341             !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
2342                 return -EOPNOTSUPP;
2343
2344         /* do we need to do anything? */
2345         if (card->options.vnicc.learning_timeout == timeout)
2346                 return rc;
2347
2348         /* if card is not ready, simply store the value internally and return */
2349         if (!qeth_card_hw_is_reachable(card)) {
2350                 card->options.vnicc.learning_timeout = timeout;
2351                 return rc;
2352         }
2353
2354         /* send timeout value to card; if successful, store value internally */
2355         rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
2356                                           IPA_VNICC_SET_TIMEOUT, &timeout);
2357         if (!rc)
2358                 card->options.vnicc.learning_timeout = timeout;
2359
2360         return rc;
2361 }
2362
2363 /* get current VNICC timeout; called from sysfs show function. Currently, only
2364  * learning supports timeout
2365  */
2366 int qeth_l2_vnicc_get_timeout(struct qeth_card *card, u32 *timeout)
2367 {
2368         int rc = 0;
2369
2370         QETH_CARD_TEXT(card, 2, "vniccgto");
2371
2372         /* do not get anything if BridgePort is enabled */
2373         if (qeth_bridgeport_is_in_use(card))
2374                 return -EBUSY;
2375
2376         /* check if characteristic and get_timeout are supported */
2377         if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
2378             !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
2379                 return -EOPNOTSUPP;
2380         /* if card is ready, get timeout. Otherwise, just return stored value */
2381         *timeout = card->options.vnicc.learning_timeout;
2382         if (qeth_card_hw_is_reachable(card))
2383                 rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
2384                                                   IPA_VNICC_GET_TIMEOUT,
2385                                                   timeout);
2386
2387         return rc;
2388 }
2389
2390 /* check if VNICC is currently enabled */
2391 bool qeth_l2_vnicc_is_in_use(struct qeth_card *card)
2392 {
2393         /* if everything is turned off, VNICC is not active */
2394         if (!card->options.vnicc.cur_chars)
2395                 return false;
2396         /* default values are only OK if rx_bcast was not enabled by user
2397          * or the card is offline.
2398          */
2399         if (card->options.vnicc.cur_chars == QETH_VNICC_DEFAULT) {
2400                 if (!card->options.vnicc.rx_bcast_enabled ||
2401                     !qeth_card_hw_is_reachable(card))
2402                         return false;
2403         }
2404         return true;
2405 }
2406
2407 /* recover user timeout setting */
2408 static bool qeth_l2_vnicc_recover_timeout(struct qeth_card *card, u32 vnicc,
2409                                           u32 *timeout)
2410 {
2411         if (card->options.vnicc.sup_chars & vnicc &&
2412             card->options.vnicc.getset_timeout_sup & vnicc &&
2413             !qeth_l2_vnicc_getset_timeout(card, vnicc, IPA_VNICC_SET_TIMEOUT,
2414                                           timeout))
2415                 return false;
2416         *timeout = QETH_VNICC_DEFAULT_TIMEOUT;
2417         return true;
2418 }
2419
2420 /* recover user characteristic setting */
2421 static bool qeth_l2_vnicc_recover_char(struct qeth_card *card, u32 vnicc,
2422                                        bool enable)
2423 {
2424         u32 cmd = enable ? IPA_VNICC_ENABLE : IPA_VNICC_DISABLE;
2425
2426         if (card->options.vnicc.sup_chars & vnicc &&
2427             card->options.vnicc.set_char_sup & vnicc &&
2428             !qeth_l2_vnicc_set_char(card, vnicc, cmd))
2429                 return false;
2430         card->options.vnicc.wanted_chars &= ~vnicc;
2431         card->options.vnicc.wanted_chars |= QETH_VNICC_DEFAULT & vnicc;
2432         return true;
2433 }
2434
2435 /* (re-)initialize VNICC */
2436 static void qeth_l2_vnicc_init(struct qeth_card *card)
2437 {
2438         u32 *timeout = &card->options.vnicc.learning_timeout;
2439         unsigned int chars_len, i;
2440         unsigned long chars_tmp;
2441         u32 sup_cmds, vnicc;
2442         bool enable, error;
2443
2444         QETH_CARD_TEXT(card, 2, "vniccini");
2445         /* reset rx_bcast */
2446         card->options.vnicc.rx_bcast_enabled = 0;
2447         /* initial query and storage of VNIC characteristics */
2448         if (qeth_l2_vnicc_query_chars(card)) {
2449                 if (card->options.vnicc.wanted_chars != QETH_VNICC_DEFAULT ||
2450                     *timeout != QETH_VNICC_DEFAULT_TIMEOUT)
2451                         dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
2452                 /* fail quietly if user didn't change the default config */
2453                 card->options.vnicc.sup_chars = 0;
2454                 card->options.vnicc.cur_chars = 0;
2455                 card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
2456                 return;
2457         }
2458         /* get supported commands for each supported characteristic */
2459         chars_tmp = card->options.vnicc.sup_chars;
2460         chars_len = sizeof(card->options.vnicc.sup_chars) * BITS_PER_BYTE;
2461         for_each_set_bit(i, &chars_tmp, chars_len) {
2462                 vnicc = BIT(i);
2463                 qeth_l2_vnicc_query_cmds(card, vnicc, &sup_cmds);
2464                 if (!(sup_cmds & IPA_VNICC_SET_TIMEOUT) ||
2465                     !(sup_cmds & IPA_VNICC_GET_TIMEOUT))
2466                         card->options.vnicc.getset_timeout_sup &= ~vnicc;
2467                 if (!(sup_cmds & IPA_VNICC_ENABLE) ||
2468                     !(sup_cmds & IPA_VNICC_DISABLE))
2469                         card->options.vnicc.set_char_sup &= ~vnicc;
2470         }
2471         /* enforce assumed default values and recover settings, if changed  */
2472         error = qeth_l2_vnicc_recover_timeout(card, QETH_VNICC_LEARNING,
2473                                               timeout);
2474         chars_tmp = card->options.vnicc.wanted_chars ^ QETH_VNICC_DEFAULT;
2475         chars_tmp |= QETH_VNICC_BRIDGE_INVISIBLE;
2476         chars_len = sizeof(card->options.vnicc.wanted_chars) * BITS_PER_BYTE;
2477         for_each_set_bit(i, &chars_tmp, chars_len) {
2478                 vnicc = BIT(i);
2479                 enable = card->options.vnicc.wanted_chars & vnicc;
2480                 error |= qeth_l2_vnicc_recover_char(card, vnicc, enable);
2481         }
2482         if (error)
2483                 dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
2484 }
2485
2486 /* configure default values of VNIC characteristics */
2487 static void qeth_l2_vnicc_set_defaults(struct qeth_card *card)
2488 {
2489         /* characteristics values */
2490         card->options.vnicc.sup_chars = QETH_VNICC_ALL;
2491         card->options.vnicc.cur_chars = QETH_VNICC_DEFAULT;
2492         card->options.vnicc.learning_timeout = QETH_VNICC_DEFAULT_TIMEOUT;
2493         /* supported commands */
2494         card->options.vnicc.set_char_sup = QETH_VNICC_ALL;
2495         card->options.vnicc.getset_timeout_sup = QETH_VNICC_LEARNING;
2496         /* settings wanted by users */
2497         card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
2498 }
2499
2500 module_init(qeth_l2_init);
2501 module_exit(qeth_l2_exit);
2502 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
2503 MODULE_DESCRIPTION("qeth layer 2 discipline");
2504 MODULE_LICENSE("GPL");