drivers/s390/net/qeth_l2_main.c

   1 /*
   2  *    Copyright IBM Corp. 2007, 2009
   3  *    Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
   4  *               Frank Pavlic <fpavlic@de.ibm.com>,
   5  *               Thomas Spatzier <tspat@de.ibm.com>,
   6  *               Frank Blaschka <frank.blaschka@de.ibm.com>
   7  */
   8
   9 #define KMSG_COMPONENT "qeth"
  10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  11
  12 #include <linux/module.h>
  13 #include <linux/moduleparam.h>
  14 #include <linux/string.h>
  15 #include <linux/errno.h>
  16 #include <linux/kernel.h>
  17 #include <linux/slab.h>
  18 #include <linux/etherdevice.h>
  19 #include <linux/ip.h>
  20 #include <linux/list.h>
  21 #include <linux/hash.h>
  22 #include <linux/hashtable.h>
  23 #include <linux/string.h>
  24 #include <asm/setup.h>
  25 #include "qeth_core.h"
  26 #include "qeth_l2.h"
  27
  28 static int qeth_l2_set_offline(struct ccwgroup_device *);
  29 static int qeth_l2_stop(struct net_device *);
  30 static void qeth_l2_set_rx_mode(struct net_device *);
  31 static void qeth_bridgeport_query_support(struct qeth_card *card);
  32 static void qeth_bridge_state_change(struct qeth_card *card,
  33                                         struct qeth_ipa_cmd *cmd);
  34 static void qeth_bridge_host_event(struct qeth_card *card,
  35                                         struct qeth_ipa_cmd *cmd);
  36
  37 static int qeth_l2_verify_dev(struct net_device *dev)
  38 {
  39         struct qeth_card *card;
  40         unsigned long flags;
  41         int rc = 0;
  42
  43         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
  44         list_for_each_entry(card, &qeth_core_card_list.list, list) {
  45                 if (card->dev == dev) {
  46                         rc = QETH_REAL_CARD;
  47                         break;
  48                 }
  49         }
  50         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
  51
  52         return rc;
  53 }
  54
  55 static struct net_device *qeth_l2_netdev_by_devno(unsigned char *read_dev_no)
  56 {
  57         struct qeth_card *card;
  58         struct net_device *ndev;
  59         __u16 temp_dev_no;
  60         unsigned long flags;
  61         struct ccw_dev_id read_devid;
  62
  63         ndev = NULL;
  64         memcpy(&temp_dev_no, read_dev_no, 2);
  65         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
  66         list_for_each_entry(card, &qeth_core_card_list.list, list) {
  67                 ccw_device_get_id(CARD_RDEV(card), &read_devid);
  68                 if (read_devid.devno == temp_dev_no) {
  69                         ndev = card->dev;
  70                         break;
  71                 }
  72         }
  73         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
  74         return ndev;
  75 }
  76
  77 static int qeth_setdel_makerc(struct qeth_card *card, int retcode)
  78 {
  79         int rc;
  80
  81         if (retcode)
  82                 QETH_CARD_TEXT_(card, 2, "err%04x", retcode);
  83         switch (retcode) {
  84         case IPA_RC_SUCCESS:
  85                 rc = 0;
  86                 break;
  87         case IPA_RC_L2_UNSUPPORTED_CMD:
  88                 rc = -EOPNOTSUPP;
  89                 break;
  90         case IPA_RC_L2_ADDR_TABLE_FULL:
  91                 rc = -ENOSPC;
  92                 break;
  93         case IPA_RC_L2_DUP_MAC:
  94         case IPA_RC_L2_DUP_LAYER3_MAC:
  95                 rc = -EEXIST;
  96                 break;
  97         case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
  98         case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
  99                 rc = -EPERM;
 100                 break;
 101         case IPA_RC_L2_MAC_NOT_FOUND:
 102                 rc = -ENOENT;
 103                 break;
 104         case -ENOMEM:
 105                 rc = -ENOMEM;
 106                 break;
 107         default:
 108                 rc = -EIO;
 109                 break;
 110         }
 111         return rc;
 112 }
 113
 114 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
 115                            enum qeth_ipa_cmds ipacmd)
 116 {
 117         struct qeth_ipa_cmd *cmd;
 118         struct qeth_cmd_buffer *iob;
 119
 120         QETH_CARD_TEXT(card, 2, "L2sdmac");
 121         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 122         if (!iob)
 123                 return -ENOMEM;
 124         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 125         cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
 126         memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
 127         return qeth_setdel_makerc(card, qeth_send_ipa_cmd(card, iob,
 128                                         NULL, NULL));
 129 }
 130
 131 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
 132 {
 133         int rc;
 134
 135         QETH_CARD_TEXT(card, 2, "L2Setmac");
 136         rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC);
 137         if (rc == 0) {
 138                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 139                 memcpy(card->dev->dev_addr, mac, OSA_ADDR_LEN);
 140                 dev_info(&card->gdev->dev,
 141                         "MAC address %pM successfully registered on device %s\n",
 142                         card->dev->dev_addr, card->dev->name);
 143         } else {
 144                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 145                 switch (rc) {
 146                 case -EEXIST:
 147                         dev_warn(&card->gdev->dev,
 148                                 "MAC address %pM already exists\n", mac);
 149                         break;
 150                 case -EPERM:
 151                         dev_warn(&card->gdev->dev,
 152                                 "MAC address %pM is not authorized\n", mac);
 153                         break;
 154                 }
 155         }
 156         return rc;
 157 }
 158
 159 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
 160 {
 161         int rc;
 162
 163         QETH_CARD_TEXT(card, 2, "L2Delmac");
 164         if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
 165                 return 0;
 166         rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC);
 167         if (rc == 0)
 168                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 169         return rc;
 170 }
 171
 172 static int qeth_l2_send_setgroupmac(struct qeth_card *card, __u8 *mac)
 173 {
 174         int rc;
 175
 176         QETH_CARD_TEXT(card, 2, "L2Sgmac");
 177         rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETGMAC);
 178         if (rc == -EEXIST)
 179                 QETH_DBF_MESSAGE(2, "Group MAC %pM already existing on %s\n",
 180                         mac, QETH_CARD_IFNAME(card));
 181         else if (rc)
 182                 QETH_DBF_MESSAGE(2, "Could not set group MAC %pM on %s: %d\n",
 183                         mac, QETH_CARD_IFNAME(card), rc);
 184         return rc;
 185 }
 186
 187 static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac)
 188 {
 189         int rc;
 190
 191         QETH_CARD_TEXT(card, 2, "L2Dgmac");
 192         rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELGMAC);
 193         if (rc)
 194                 QETH_DBF_MESSAGE(2,
 195                         "Could not delete group MAC %pM on %s: %d\n",
 196                         mac, QETH_CARD_IFNAME(card), rc);
 197         return rc;
 198 }
 199
 200 static int qeth_l2_write_mac(struct qeth_card *card, struct qeth_mac *mac)
 201 {
 202         if (mac->is_uc) {
 203                 return qeth_l2_send_setdelmac(card, mac->mac_addr,
 204                                                 IPA_CMD_SETVMAC);
 205         } else {
 206                 return qeth_l2_send_setgroupmac(card, mac->mac_addr);
 207         }
 208 }
 209
 210 static int qeth_l2_remove_mac(struct qeth_card *card, struct qeth_mac *mac)
 211 {
 212         if (mac->is_uc) {
 213                 return qeth_l2_send_setdelmac(card, mac->mac_addr,
 214                                                 IPA_CMD_DELVMAC);
 215         } else {
 216                 return qeth_l2_send_delgroupmac(card, mac->mac_addr);
 217         }
 218 }
 219
 220 static void qeth_l2_del_all_macs(struct qeth_card *card)
 221 {
 222         struct qeth_mac *mac;
 223         struct hlist_node *tmp;
 224         int i;
 225
 226         spin_lock_bh(&card->mclock);
 227         hash_for_each_safe(card->mac_htable, i, tmp, mac, hnode) {
 228                 hash_del(&mac->hnode);
 229                 kfree(mac);
 230         }
 231         spin_unlock_bh(&card->mclock);
 232 }
 233
 234 static int qeth_l2_get_cast_type(struct qeth_card *card, struct sk_buff *skb)
 235 {
 236         if (card->info.type == QETH_CARD_TYPE_OSN)
 237                 return RTN_UNSPEC;
 238         if (is_broadcast_ether_addr(skb->data))
 239                 return RTN_BROADCAST;
 240         if (is_multicast_ether_addr(skb->data))
 241                 return RTN_MULTICAST;
 242         return RTN_UNSPEC;
 243 }
 244
 245 static void qeth_l2_hdr_csum(struct qeth_card *card, struct qeth_hdr *hdr,
 246                              struct sk_buff *skb)
 247 {
 248         struct iphdr *iph = ip_hdr(skb);
 249
 250         /* tcph->check contains already the pseudo hdr checksum
 251          * so just set the header flags
 252          */
 253         if (iph->protocol == IPPROTO_UDP)
 254                 hdr->hdr.l2.flags[1] |= QETH_HDR_EXT_UDP;
 255         hdr->hdr.l2.flags[1] |= QETH_HDR_EXT_CSUM_TRANSP_REQ |
 256                 QETH_HDR_EXT_CSUM_HDR_REQ;
 257         iph->check = 0;
 258         if (card->options.performance_stats)
 259                 card->perf_stats.tx_csum++;
 260 }
 261
 262 static void qeth_l2_fill_header(struct qeth_hdr *hdr, struct sk_buff *skb,
 263                                 int cast_type, unsigned int data_len)
 264 {
 265         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
 266
 267         memset(hdr, 0, sizeof(struct qeth_hdr));
 268         hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
 269         hdr->hdr.l2.pkt_length = data_len;
 270
 271         /* set byte byte 3 to casting flags */
 272         if (cast_type == RTN_MULTICAST)
 273                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 274         else if (cast_type == RTN_BROADCAST)
 275                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 276         else
 277                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 278
 279         /* VSWITCH relies on the VLAN
 280          * information to be present in
 281          * the QDIO header */
 282         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
 283                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
 284                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
 285         }
 286 }
 287
 288 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
 289                         struct qeth_reply *reply, unsigned long data)
 290 {
 291         struct qeth_ipa_cmd *cmd;
 292
 293         QETH_CARD_TEXT(card, 2, "L2sdvcb");
 294         cmd = (struct qeth_ipa_cmd *) data;
 295         if (cmd->hdr.return_code) {
 296                 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x. "
 297                           "Continuing\n", cmd->data.setdelvlan.vlan_id,
 298                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 299                 QETH_CARD_TEXT_(card, 2, "L2VL%4x", cmd->hdr.command);
 300                 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code);
 301         }
 302         return 0;
 303 }
 304
 305 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
 306                                 enum qeth_ipa_cmds ipacmd)
 307 {
 308         struct qeth_ipa_cmd *cmd;
 309         struct qeth_cmd_buffer *iob;
 310
 311         QETH_CARD_TEXT_(card, 4, "L2sdv%x", ipacmd);
 312         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 313         if (!iob)
 314                 return -ENOMEM;
 315         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 316         cmd->data.setdelvlan.vlan_id = i;
 317         return qeth_send_ipa_cmd(card, iob,
 318                                  qeth_l2_send_setdelvlan_cb, NULL);
 319 }
 320
 321 static void qeth_l2_process_vlans(struct qeth_card *card)
 322 {
 323         struct qeth_vlan_vid *id;
 324         QETH_CARD_TEXT(card, 3, "L2prcvln");
 325         spin_lock_bh(&card->vlanlock);
 326         list_for_each_entry(id, &card->vid_list, list) {
 327                 qeth_l2_send_setdelvlan(card, id->vid, IPA_CMD_SETVLAN);
 328         }
 329         spin_unlock_bh(&card->vlanlock);
 330 }
 331
 332 static int qeth_l2_vlan_rx_add_vid(struct net_device *dev,
 333                                    __be16 proto, u16 vid)
 334 {
 335         struct qeth_card *card = dev->ml_priv;
 336         struct qeth_vlan_vid *id;
 337         int rc;
 338
 339         QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
 340         if (!vid)
 341                 return 0;
 342         if (card->info.type == QETH_CARD_TYPE_OSM) {
 343                 QETH_CARD_TEXT(card, 3, "aidOSM");
 344                 return 0;
 345         }
 346         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 347                 QETH_CARD_TEXT(card, 3, "aidREC");
 348                 return 0;
 349         }
 350         id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
 351         if (id) {
 352                 id->vid = vid;
 353                 rc = qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
 354                 if (rc) {
 355                         kfree(id);
 356                         return rc;
 357                 }
 358                 spin_lock_bh(&card->vlanlock);
 359                 list_add_tail(&id->list, &card->vid_list);
 360                 spin_unlock_bh(&card->vlanlock);
 361         } else {
 362                 return -ENOMEM;
 363         }
 364         return 0;
 365 }
 366
 367 static int qeth_l2_vlan_rx_kill_vid(struct net_device *dev,
 368                                     __be16 proto, u16 vid)
 369 {
 370         struct qeth_vlan_vid *id, *tmpid = NULL;
 371         struct qeth_card *card = dev->ml_priv;
 372         int rc = 0;
 373
 374         QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
 375         if (card->info.type == QETH_CARD_TYPE_OSM) {
 376                 QETH_CARD_TEXT(card, 3, "kidOSM");
 377                 return 0;
 378         }
 379         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 380                 QETH_CARD_TEXT(card, 3, "kidREC");
 381                 return 0;
 382         }
 383         spin_lock_bh(&card->vlanlock);
 384         list_for_each_entry(id, &card->vid_list, list) {
 385                 if (id->vid == vid) {
 386                         list_del(&id->list);
 387                         tmpid = id;
 388                         break;
 389                 }
 390         }
 391         spin_unlock_bh(&card->vlanlock);
 392         if (tmpid) {
 393                 rc = qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 394                 kfree(tmpid);
 395         }
 396         qeth_l2_set_rx_mode(card->dev);
 397         return rc;
 398 }
 399
 400 static void qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
 401 {
 402         QETH_DBF_TEXT(SETUP , 2, "stopcard");
 403         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 404
 405         qeth_set_allowed_threads(card, 0, 1);
 406         if (card->read.state == CH_STATE_UP &&
 407             card->write.state == CH_STATE_UP &&
 408             (card->state == CARD_STATE_UP)) {
 409                 if (recovery_mode &&
 410                     card->info.type != QETH_CARD_TYPE_OSN) {
 411                         qeth_l2_stop(card->dev);
 412                 } else {
 413                         rtnl_lock();
 414                         dev_close(card->dev);
 415                         rtnl_unlock();
 416                 }
 417                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 418                 card->state = CARD_STATE_SOFTSETUP;
 419         }
 420         if (card->state == CARD_STATE_SOFTSETUP) {
 421                 qeth_l2_del_all_macs(card);
 422                 qeth_clear_ipacmd_list(card);
 423                 card->state = CARD_STATE_HARDSETUP;
 424         }
 425         if (card->state == CARD_STATE_HARDSETUP) {
 426                 qeth_qdio_clear_card(card, 0);
 427                 qeth_clear_qdio_buffers(card);
 428                 qeth_clear_working_pool_list(card);
 429                 card->state = CARD_STATE_DOWN;
 430         }
 431         if (card->state == CARD_STATE_DOWN) {
 432                 qeth_clear_cmd_buffers(&card->read);
 433                 qeth_clear_cmd_buffers(&card->write);
 434         }
 435 }
 436
 437 static int qeth_l2_process_inbound_buffer(struct qeth_card *card,
 438                                 int budget, int *done)
 439 {
 440         int work_done = 0;
 441         struct sk_buff *skb;
 442         struct qeth_hdr *hdr;
 443         unsigned int len;
 444
 445         *done = 0;
 446         WARN_ON_ONCE(!budget);
 447         while (budget) {
 448                 skb = qeth_core_get_next_skb(card,
 449                         &card->qdio.in_q->bufs[card->rx.b_index],
 450                         &card->rx.b_element, &card->rx.e_offset, &hdr);
 451                 if (!skb) {
 452                         *done = 1;
 453                         break;
 454                 }
 455                 skb->dev = card->dev;
 456                 switch (hdr->hdr.l2.id) {
 457                 case QETH_HEADER_TYPE_LAYER2:
 458                         skb->pkt_type = PACKET_HOST;
 459                         skb->protocol = eth_type_trans(skb, skb->dev);
 460                         if ((card->dev->features & NETIF_F_RXCSUM)
 461                            && ((hdr->hdr.l2.flags[1] &
 462                                 (QETH_HDR_EXT_CSUM_HDR_REQ |
 463                                    QETH_HDR_EXT_CSUM_TRANSP_REQ)) ==
 464                                 (QETH_HDR_EXT_CSUM_HDR_REQ |
 465                                    QETH_HDR_EXT_CSUM_TRANSP_REQ)))
 466                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 467                         else
 468                                 skb->ip_summed = CHECKSUM_NONE;
 469                         if (skb->protocol == htons(ETH_P_802_2))
 470                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
 471                         len = skb->len;
 472                         napi_gro_receive(&card->napi, skb);
 473                         break;
 474                 case QETH_HEADER_TYPE_OSN:
 475                         if (card->info.type == QETH_CARD_TYPE_OSN) {
 476                                 skb_push(skb, sizeof(struct qeth_hdr));
 477                                 skb_copy_to_linear_data(skb, hdr,
 478                                                 sizeof(struct qeth_hdr));
 479                                 len = skb->len;
 480                                 card->osn_info.data_cb(skb);
 481                                 break;
 482                         }
 483                         /* else unknown */
 484                 default:
 485                         dev_kfree_skb_any(skb);
 486                         QETH_CARD_TEXT(card, 3, "inbunkno");
 487                         QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
 488                         continue;
 489                 }
 490                 work_done++;
 491                 budget--;
 492                 card->stats.rx_packets++;
 493                 card->stats.rx_bytes += len;
 494         }
 495         return work_done;
 496 }
 497
 498 static int qeth_l2_request_initial_mac(struct qeth_card *card)
 499 {
 500         int rc = 0;
 501         char vendor_pre[] = {0x02, 0x00, 0x00};
 502
 503         QETH_DBF_TEXT(SETUP, 2, "l2reqmac");
 504         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
 505
 506         if (MACHINE_IS_VM) {
 507                 rc = qeth_vm_request_mac(card);
 508                 if (!rc)
 509                         goto out;
 510                 QETH_DBF_MESSAGE(2, "z/VM MAC Service failed on device %s: x%x\n",
 511                                  CARD_BUS_ID(card), rc);
 512                 QETH_DBF_TEXT_(SETUP, 2, "err%04x", rc);
 513                 /* fall back to alternative mechanism: */
 514         }
 515
 516         if (card->info.type == QETH_CARD_TYPE_IQD ||
 517             card->info.type == QETH_CARD_TYPE_OSM ||
 518             card->info.type == QETH_CARD_TYPE_OSX ||
 519             card->info.guestlan) {
 520                 rc = qeth_setadpparms_change_macaddr(card);
 521                 if (rc) {
 522                         QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
 523                                 "device %s: x%x\n", CARD_BUS_ID(card), rc);
 524                         QETH_DBF_TEXT_(SETUP, 2, "1err%04x", rc);
 525                         return rc;
 526                 }
 527         } else {
 528                 eth_random_addr(card->dev->dev_addr);
 529                 memcpy(card->dev->dev_addr, vendor_pre, 3);
 530         }
 531 out:
 532         QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, card->dev->addr_len);
 533         return 0;
 534 }
 535
 536 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 537 {
 538         struct sockaddr *addr = p;
 539         struct qeth_card *card = dev->ml_priv;
 540         int rc = 0;
 541
 542         QETH_CARD_TEXT(card, 3, "setmac");
 543
 544         if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
 545                 QETH_CARD_TEXT(card, 3, "setmcINV");
 546                 return -EOPNOTSUPP;
 547         }
 548
 549         if (card->info.type == QETH_CARD_TYPE_OSN ||
 550             card->info.type == QETH_CARD_TYPE_OSM ||
 551             card->info.type == QETH_CARD_TYPE_OSX) {
 552                 QETH_CARD_TEXT(card, 3, "setmcTYP");
 553                 return -EOPNOTSUPP;
 554         }
 555         QETH_CARD_HEX(card, 3, addr->sa_data, OSA_ADDR_LEN);
 556         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 557                 QETH_CARD_TEXT(card, 3, "setmcREC");
 558                 return -ERESTARTSYS;
 559         }
 560         rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
 561         if (!rc || (rc == -ENOENT))
 562                 rc = qeth_l2_send_setmac(card, addr->sa_data);
 563         return rc ? -EINVAL : 0;
 564 }
 565
 566 static void qeth_promisc_to_bridge(struct qeth_card *card)
 567 {
 568         struct net_device *dev = card->dev;
 569         enum qeth_ipa_promisc_modes promisc_mode;
 570         int role;
 571         int rc;
 572
 573         QETH_CARD_TEXT(card, 3, "pmisc2br");
 574
 575         if (!card->options.sbp.reflect_promisc)
 576                 return;
 577         promisc_mode = (dev->flags & IFF_PROMISC) ? SET_PROMISC_MODE_ON
 578                                                 : SET_PROMISC_MODE_OFF;
 579         if (promisc_mode == card->info.promisc_mode)
 580                 return;
 581
 582         if (promisc_mode == SET_PROMISC_MODE_ON) {
 583                 if (card->options.sbp.reflect_promisc_primary)
 584                         role = QETH_SBP_ROLE_PRIMARY;
 585                 else
 586                         role = QETH_SBP_ROLE_SECONDARY;
 587         } else
 588                 role = QETH_SBP_ROLE_NONE;
 589
 590         rc = qeth_bridgeport_setrole(card, role);
 591         QETH_DBF_TEXT_(SETUP, 2, "bpm%c%04x",
 592                         (promisc_mode == SET_PROMISC_MODE_ON) ? '+' : '-', rc);
 593         if (!rc) {
 594                 card->options.sbp.role = role;
 595                 card->info.promisc_mode = promisc_mode;
 596         }
 597
 598 }
 599 /* New MAC address is added to the hash table and marked to be written on card
 600  * only if there is not in the hash table storage already
 601  *
 602 */
 603 static void qeth_l2_add_mac(struct qeth_card *card, struct netdev_hw_addr *ha,
 604                             u8 is_uc)
 605 {
 606         u32 mac_hash = get_unaligned((u32 *)(&ha->addr[2]));
 607         struct qeth_mac *mac;
 608
 609         hash_for_each_possible(card->mac_htable, mac, hnode, mac_hash) {
 610                 if (is_uc == mac->is_uc &&
 611                     !memcmp(ha->addr, mac->mac_addr, OSA_ADDR_LEN)) {
 612                         mac->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
 613                         return;
 614                 }
 615         }
 616
 617         mac = kzalloc(sizeof(struct qeth_mac), GFP_ATOMIC);
 618
 619         if (!mac)
 620                 return;
 621
 622         memcpy(mac->mac_addr, ha->addr, OSA_ADDR_LEN);
 623         mac->is_uc = is_uc;
 624         mac->disp_flag = QETH_DISP_ADDR_ADD;
 625
 626         hash_add(card->mac_htable, &mac->hnode, mac_hash);
 627 }
 628
 629 static void qeth_l2_set_rx_mode(struct net_device *dev)
 630 {
 631         struct qeth_card *card = dev->ml_priv;
 632         struct netdev_hw_addr *ha;
 633         struct qeth_mac *mac;
 634         struct hlist_node *tmp;
 635         int i;
 636         int rc;
 637
 638         if (card->info.type == QETH_CARD_TYPE_OSN)
 639                 return;
 640
 641         QETH_CARD_TEXT(card, 3, "setmulti");
 642         if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
 643             (card->state != CARD_STATE_UP))
 644                 return;
 645
 646         spin_lock_bh(&card->mclock);
 647
 648         netdev_for_each_mc_addr(ha, dev)
 649                 qeth_l2_add_mac(card, ha, 0);
 650
 651         netdev_for_each_uc_addr(ha, dev)
 652                 qeth_l2_add_mac(card, ha, 1);
 653
 654         hash_for_each_safe(card->mac_htable, i, tmp, mac, hnode) {
 655                 if (mac->disp_flag == QETH_DISP_ADDR_DELETE) {
 656                         qeth_l2_remove_mac(card, mac);
 657                         hash_del(&mac->hnode);
 658                         kfree(mac);
 659
 660                 } else if (mac->disp_flag == QETH_DISP_ADDR_ADD) {
 661                         rc = qeth_l2_write_mac(card, mac);
 662                         if (rc) {
 663                                 hash_del(&mac->hnode);
 664                                 kfree(mac);
 665                         } else
 666                                 mac->disp_flag = QETH_DISP_ADDR_DELETE;
 667                 } else
 668                         mac->disp_flag = QETH_DISP_ADDR_DELETE;
 669         }
 670
 671         spin_unlock_bh(&card->mclock);
 672
 673         if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
 674                 qeth_setadp_promisc_mode(card);
 675         else
 676                 qeth_promisc_to_bridge(card);
 677 }
 678
 679 static int qeth_l2_xmit_iqd(struct qeth_card *card, struct sk_buff *skb,
 680                             struct qeth_qdio_out_q *queue, int cast_type)
 681 {
 682         unsigned int data_offset = ETH_HLEN;
 683         struct qeth_hdr *hdr;
 684         int rc;
 685
 686         hdr = kmem_cache_alloc(qeth_core_header_cache, GFP_ATOMIC);
 687         if (!hdr)
 688                 return -ENOMEM;
 689         qeth_l2_fill_header(hdr, skb, cast_type, skb->len);
 690         skb_copy_from_linear_data(skb, ((char *)hdr) + sizeof(*hdr),
 691                                   data_offset);
 692
 693         if (!qeth_get_elements_no(card, skb, 1, data_offset)) {
 694                 rc = -E2BIG;
 695                 goto out;
 696         }
 697         rc = qeth_do_send_packet_fast(card, queue, skb, hdr, data_offset,
 698                                       sizeof(*hdr) + data_offset);
 699 out:
 700         if (rc)
 701                 kmem_cache_free(qeth_core_header_cache, hdr);
 702         return rc;
 703 }
 704
 705 static int qeth_l2_xmit_osa(struct qeth_card *card, struct sk_buff *skb,
 706                             struct qeth_qdio_out_q *queue, int cast_type)
 707 {
 708         int push_len = sizeof(struct qeth_hdr);
 709         unsigned int elements, nr_frags;
 710         unsigned int hdr_elements = 0;
 711         struct qeth_hdr *hdr = NULL;
 712         unsigned int hd_len = 0;
 713         int rc;
 714
 715         /* fix hardware limitation: as long as we do not have sbal
 716          * chaining we can not send long frag lists
 717          */
 718         if (!qeth_get_elements_no(card, skb, 0, 0)) {
 719                 rc = skb_linearize(skb);
 720
 721                 if (card->options.performance_stats) {
 722                         if (rc)
 723                                 card->perf_stats.tx_linfail++;
 724                         else
 725                                 card->perf_stats.tx_lin++;
 726                 }
 727                 if (rc)
 728                         return rc;
 729         }
 730         nr_frags = skb_shinfo(skb)->nr_frags;
 731
 732         rc = skb_cow_head(skb, push_len);
 733         if (rc)
 734                 return rc;
 735         push_len = qeth_push_hdr(skb, &hdr, push_len);
 736         if (push_len < 0)
 737                 return push_len;
 738         if (!push_len) {
 739                 /* hdr was allocated from cache */
 740                 hd_len = sizeof(*hdr);
 741                 hdr_elements = 1;
 742         }
 743         qeth_l2_fill_header(hdr, skb, cast_type, skb->len - push_len);
 744         if (skb->ip_summed == CHECKSUM_PARTIAL)
 745                 qeth_l2_hdr_csum(card, hdr, skb);
 746
 747         elements = qeth_get_elements_no(card, skb, hdr_elements, 0);
 748         if (!elements) {
 749                 rc = -E2BIG;
 750                 goto out;
 751         }
 752         elements += hdr_elements;
 753
 754         /* TODO: remove the skb_orphan() once TX completion is fast enough */
 755         skb_orphan(skb);
 756         rc = qeth_do_send_packet(card, queue, skb, hdr, 0, hd_len, elements);
 757 out:
 758         if (!rc) {
 759                 if (card->options.performance_stats && nr_frags) {
 760                         card->perf_stats.sg_skbs_sent++;
 761                         /* nr_frags + skb->data */
 762                         card->perf_stats.sg_frags_sent += nr_frags + 1;
 763                 }
 764         } else {
 765                 if (hd_len)
 766                         kmem_cache_free(qeth_core_header_cache, hdr);
 767                 if (rc == -EBUSY)
 768                         /* roll back to ETH header */
 769                         skb_pull(skb, push_len);
 770         }
 771         return rc;
 772 }
 773
 774 static int qeth_l2_xmit_osn(struct qeth_card *card, struct sk_buff *skb,
 775                             struct qeth_qdio_out_q *queue)
 776 {
 777         unsigned int elements;
 778         struct qeth_hdr *hdr;
 779
 780         if (skb->protocol == htons(ETH_P_IPV6))
 781                 return -EPROTONOSUPPORT;
 782
 783         hdr = (struct qeth_hdr *)skb->data;
 784         elements = qeth_get_elements_no(card, skb, 0, 0);
 785         if (!elements)
 786                 return -E2BIG;
 787         if (qeth_hdr_chk_and_bounce(skb, &hdr, sizeof(*hdr)))
 788                 return -EINVAL;
 789         return qeth_do_send_packet(card, queue, skb, hdr, 0, 0, elements);
 790 }
 791
 792 static netdev_tx_t qeth_l2_hard_start_xmit(struct sk_buff *skb,
 793                                            struct net_device *dev)
 794 {
 795         struct qeth_card *card = dev->ml_priv;
 796         int cast_type = qeth_l2_get_cast_type(card, skb);
 797         struct qeth_qdio_out_q *queue;
 798         int tx_bytes = skb->len;
 799         int rc;
 800
 801         if (card->qdio.do_prio_queueing || (cast_type &&
 802                                         card->info.is_multicast_different))
 803                 queue = card->qdio.out_qs[qeth_get_priority_queue(card, skb,
 804                                         qeth_get_ip_version(skb), cast_type)];
 805         else
 806                 queue = card->qdio.out_qs[card->qdio.default_out_queue];
 807
 808         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
 809                 card->stats.tx_carrier_errors++;
 810                 goto tx_drop;
 811         }
 812
 813         if (card->options.performance_stats) {
 814                 card->perf_stats.outbound_cnt++;
 815                 card->perf_stats.outbound_start_time = qeth_get_micros();
 816         }
 817         netif_stop_queue(dev);
 818
 819         switch (card->info.type) {
 820         case QETH_CARD_TYPE_OSN:
 821                 rc = qeth_l2_xmit_osn(card, skb, queue);
 822                 break;
 823         case QETH_CARD_TYPE_IQD:
 824                 rc = qeth_l2_xmit_iqd(card, skb, queue, cast_type);
 825                 break;
 826         default:
 827                 rc = qeth_l2_xmit_osa(card, skb, queue, cast_type);
 828         }
 829
 830         if (!rc) {
 831                 card->stats.tx_packets++;
 832                 card->stats.tx_bytes += tx_bytes;
 833                 if (card->options.performance_stats)
 834                         card->perf_stats.outbound_time += qeth_get_micros() -
 835                                 card->perf_stats.outbound_start_time;
 836                 netif_wake_queue(dev);
 837                 return NETDEV_TX_OK;
 838         } else if (rc == -EBUSY) {
 839                 return NETDEV_TX_BUSY;
 840         } /* else fall through */
 841
 842 tx_drop:
 843         card->stats.tx_dropped++;
 844         card->stats.tx_errors++;
 845         dev_kfree_skb_any(skb);
 846         netif_wake_queue(dev);
 847         return NETDEV_TX_OK;
 848 }
 849
 850 static int __qeth_l2_open(struct net_device *dev)
 851 {
 852         struct qeth_card *card = dev->ml_priv;
 853         int rc = 0;
 854
 855         QETH_CARD_TEXT(card, 4, "qethopen");
 856         if (card->state == CARD_STATE_UP)
 857                 return rc;
 858         if (card->state != CARD_STATE_SOFTSETUP)
 859                 return -ENODEV;
 860
 861         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
 862              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
 863                 QETH_CARD_TEXT(card, 4, "nomacadr");
 864                 return -EPERM;
 865         }
 866         card->data.state = CH_STATE_UP;
 867         card->state = CARD_STATE_UP;
 868         netif_start_queue(dev);
 869
 870         if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) {
 871                 napi_enable(&card->napi);
 872                 napi_schedule(&card->napi);
 873         } else
 874                 rc = -EIO;
 875         return rc;
 876 }
 877
 878 static int qeth_l2_open(struct net_device *dev)
 879 {
 880         struct qeth_card *card = dev->ml_priv;
 881
 882         QETH_CARD_TEXT(card, 5, "qethope_");
 883         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 884                 QETH_CARD_TEXT(card, 3, "openREC");
 885                 return -ERESTARTSYS;
 886         }
 887         return __qeth_l2_open(dev);
 888 }
 889
 890 static int qeth_l2_stop(struct net_device *dev)
 891 {
 892         struct qeth_card *card = dev->ml_priv;
 893
 894         QETH_CARD_TEXT(card, 4, "qethstop");
 895         netif_tx_disable(dev);
 896         if (card->state == CARD_STATE_UP) {
 897                 card->state = CARD_STATE_SOFTSETUP;
 898                 napi_disable(&card->napi);
 899         }
 900         return 0;
 901 }
 902
 903 static const struct device_type qeth_l2_devtype = {
 904         .name = "qeth_layer2",
 905         .groups = qeth_l2_attr_groups,
 906 };
 907
 908 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 909 {
 910         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 911         int rc;
 912
 913         if (gdev->dev.type == &qeth_generic_devtype) {
 914                 rc = qeth_l2_create_device_attributes(&gdev->dev);
 915                 if (rc)
 916                         return rc;
 917         }
 918         INIT_LIST_HEAD(&card->vid_list);
 919         hash_init(card->mac_htable);
 920         card->options.layer2 = 1;
 921         card->info.hwtrap = 0;
 922         return 0;
 923 }
 924
 925 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
 926 {
 927         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
 928
 929         if (cgdev->dev.type == &qeth_generic_devtype)
 930                 qeth_l2_remove_device_attributes(&cgdev->dev);
 931         qeth_set_allowed_threads(card, 0, 1);
 932         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 933
 934         if (cgdev->state == CCWGROUP_ONLINE)
 935                 qeth_l2_set_offline(cgdev);
 936
 937         if (card->dev) {
 938                 unregister_netdev(card->dev);
 939                 free_netdev(card->dev);
 940                 card->dev = NULL;
 941         }
 942         return;
 943 }
 944
 945 static const struct ethtool_ops qeth_l2_ethtool_ops = {
 946         .get_link = ethtool_op_get_link,
 947         .get_strings = qeth_core_get_strings,
 948         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 949         .get_sset_count = qeth_core_get_sset_count,
 950         .get_drvinfo = qeth_core_get_drvinfo,
 951         .get_link_ksettings = qeth_core_ethtool_get_link_ksettings,
 952 };
 953
 954 static const struct ethtool_ops qeth_l2_osn_ops = {
 955         .get_strings = qeth_core_get_strings,
 956         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 957         .get_sset_count = qeth_core_get_sset_count,
 958         .get_drvinfo = qeth_core_get_drvinfo,
 959 };
 960
 961 static const struct net_device_ops qeth_l2_netdev_ops = {
 962         .ndo_open               = qeth_l2_open,
 963         .ndo_stop               = qeth_l2_stop,
 964         .ndo_get_stats          = qeth_get_stats,
 965         .ndo_start_xmit         = qeth_l2_hard_start_xmit,
 966         .ndo_features_check     = qeth_features_check,
 967         .ndo_validate_addr      = eth_validate_addr,
 968         .ndo_set_rx_mode        = qeth_l2_set_rx_mode,
 969         .ndo_do_ioctl           = qeth_do_ioctl,
 970         .ndo_set_mac_address    = qeth_l2_set_mac_address,
 971         .ndo_change_mtu         = qeth_change_mtu,
 972         .ndo_vlan_rx_add_vid    = qeth_l2_vlan_rx_add_vid,
 973         .ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,
 974         .ndo_tx_timeout         = qeth_tx_timeout,
 975         .ndo_fix_features       = qeth_fix_features,
 976         .ndo_set_features       = qeth_set_features
 977 };
 978
 979 static int qeth_l2_setup_netdev(struct qeth_card *card)
 980 {
 981         switch (card->info.type) {
 982         case QETH_CARD_TYPE_IQD:
 983                 card->dev = alloc_netdev(0, "hsi%d", NET_NAME_UNKNOWN,
 984                                          ether_setup);
 985                 break;
 986         case QETH_CARD_TYPE_OSN:
 987                 card->dev = alloc_netdev(0, "osn%d", NET_NAME_UNKNOWN,
 988                                          ether_setup);
 989                 break;
 990         default:
 991                 card->dev = alloc_etherdev(0);
 992         }
 993
 994         if (!card->dev)
 995                 return -ENODEV;
 996
 997         card->dev->ml_priv = card;
 998         card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
 999         card->dev->mtu = card->info.initial_mtu;
1000         card->dev->min_mtu = 64;
1001         card->dev->max_mtu = ETH_MAX_MTU;
1002         card->dev->netdev_ops = &qeth_l2_netdev_ops;
1003         if (card->info.type == QETH_CARD_TYPE_OSN) {
1004                 card->dev->ethtool_ops = &qeth_l2_osn_ops;
1005                 card->dev->flags |= IFF_NOARP;
1006         } else {
1007                 card->dev->ethtool_ops = &qeth_l2_ethtool_ops;
1008         }
1009         card->dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
1010         if (card->info.type == QETH_CARD_TYPE_OSD && !card->info.guestlan) {
1011                 card->dev->hw_features = NETIF_F_SG;
1012                 card->dev->vlan_features = NETIF_F_SG;
1013                 card->dev->features |= NETIF_F_SG;
1014                 /* OSA 3S and earlier has no RX/TX support */
1015                 if (qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM)) {
1016                         card->dev->hw_features |= NETIF_F_IP_CSUM;
1017                         card->dev->vlan_features |= NETIF_F_IP_CSUM;
1018                 }
1019                 if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM)) {
1020                         card->dev->hw_features |= NETIF_F_RXCSUM;
1021                         card->dev->vlan_features |= NETIF_F_RXCSUM;
1022                 }
1023         }
1024         if (card->info.type != QETH_CARD_TYPE_OSN &&
1025             card->info.type != QETH_CARD_TYPE_IQD) {
1026                 card->dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1027                 card->dev->needed_headroom = sizeof(struct qeth_hdr);
1028         }
1029
1030         card->info.broadcast_capable = 1;
1031         qeth_l2_request_initial_mac(card);
1032         SET_NETDEV_DEV(card->dev, &card->gdev->dev);
1033         netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT);
1034         netif_carrier_off(card->dev);
1035         return register_netdev(card->dev);
1036 }
1037
1038 static int qeth_l2_start_ipassists(struct qeth_card *card)
1039 {
1040         /* configure isolation level */
1041         if (qeth_set_access_ctrl_online(card, 0))
1042                 return -ENODEV;
1043         return 0;
1044 }
1045
1046 static void qeth_l2_trace_features(struct qeth_card *card)
1047 {
1048         QETH_CARD_TEXT(card, 2, "l2featur");
1049         QETH_CARD_HEX(card, 2, &card->options.sbp.supported_funcs,
1050                       sizeof(card->options.sbp.supported_funcs));
1051 }
1052
1053 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
1054 {
1055         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1056         int rc = 0;
1057         enum qeth_card_states recover_flag;
1058
1059         mutex_lock(&card->discipline_mutex);
1060         mutex_lock(&card->conf_mutex);
1061         QETH_DBF_TEXT(SETUP, 2, "setonlin");
1062         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1063
1064         recover_flag = card->state;
1065         rc = qeth_core_hardsetup_card(card);
1066         if (rc) {
1067                 QETH_DBF_TEXT_(SETUP, 2, "2err%04x", rc);
1068                 rc = -ENODEV;
1069                 goto out_remove;
1070         }
1071         qeth_bridgeport_query_support(card);
1072         if (card->options.sbp.supported_funcs)
1073                 dev_info(&card->gdev->dev,
1074                 "The device represents a Bridge Capable Port\n");
1075         qeth_trace_features(card);
1076         qeth_l2_trace_features(card);
1077
1078         if (!card->dev && qeth_l2_setup_netdev(card)) {
1079                 rc = -ENODEV;
1080                 goto out_remove;
1081         }
1082
1083         if (card->info.type != QETH_CARD_TYPE_OSN)
1084                 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
1085
1086         if (qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP)) {
1087                 if (card->info.hwtrap &&
1088                     qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM))
1089                         card->info.hwtrap = 0;
1090         } else
1091                 card->info.hwtrap = 0;
1092
1093         qeth_l2_setup_bridgeport_attrs(card);
1094
1095         card->state = CARD_STATE_HARDSETUP;
1096         memset(&card->rx, 0, sizeof(struct qeth_rx));
1097         qeth_print_status_message(card);
1098
1099         /* softsetup */
1100         QETH_DBF_TEXT(SETUP, 2, "softsetp");
1101
1102         if ((card->info.type == QETH_CARD_TYPE_OSD) ||
1103             (card->info.type == QETH_CARD_TYPE_OSX)) {
1104                 rc = qeth_l2_start_ipassists(card);
1105                 if (rc)
1106                         goto out_remove;
1107         }
1108
1109         if (card->info.type != QETH_CARD_TYPE_OSN &&
1110             card->info.type != QETH_CARD_TYPE_OSM)
1111                 qeth_l2_process_vlans(card);
1112
1113         netif_tx_disable(card->dev);
1114
1115         rc = qeth_init_qdio_queues(card);
1116         if (rc) {
1117                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1118                 rc = -ENODEV;
1119                 goto out_remove;
1120         }
1121         card->state = CARD_STATE_SOFTSETUP;
1122         if (card->lan_online)
1123                 netif_carrier_on(card->dev);
1124         else
1125                 netif_carrier_off(card->dev);
1126
1127         qeth_set_allowed_threads(card, 0xffffffff, 0);
1128         if (recover_flag == CARD_STATE_RECOVER) {
1129                 if (recovery_mode &&
1130                     card->info.type != QETH_CARD_TYPE_OSN) {
1131                         __qeth_l2_open(card->dev);
1132                 } else {
1133                         rtnl_lock();
1134                         dev_open(card->dev);
1135                         rtnl_unlock();
1136                 }
1137                 /* this also sets saved unicast addresses */
1138                 qeth_l2_set_rx_mode(card->dev);
1139                 rtnl_lock();
1140                 qeth_recover_features(card->dev);
1141                 rtnl_unlock();
1142         }
1143         /* let user_space know that device is online */
1144         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1145         mutex_unlock(&card->conf_mutex);
1146         mutex_unlock(&card->discipline_mutex);
1147         return 0;
1148
1149 out_remove:
1150         qeth_l2_stop_card(card, 0);
1151         ccw_device_set_offline(CARD_DDEV(card));
1152         ccw_device_set_offline(CARD_WDEV(card));
1153         ccw_device_set_offline(CARD_RDEV(card));
1154         qdio_free(CARD_DDEV(card));
1155         if (recover_flag == CARD_STATE_RECOVER)
1156                 card->state = CARD_STATE_RECOVER;
1157         else
1158                 card->state = CARD_STATE_DOWN;
1159         mutex_unlock(&card->conf_mutex);
1160         mutex_unlock(&card->discipline_mutex);
1161         return rc;
1162 }
1163
1164 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1165 {
1166         return __qeth_l2_set_online(gdev, 0);
1167 }
1168
1169 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1170                                         int recovery_mode)
1171 {
1172         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1173         int rc = 0, rc2 = 0, rc3 = 0;
1174         enum qeth_card_states recover_flag;
1175
1176         mutex_lock(&card->discipline_mutex);
1177         mutex_lock(&card->conf_mutex);
1178         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1179         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1180
1181         if (card->dev && netif_carrier_ok(card->dev))
1182                 netif_carrier_off(card->dev);
1183         recover_flag = card->state;
1184         if ((!recovery_mode && card->info.hwtrap) || card->info.hwtrap == 2) {
1185                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1186                 card->info.hwtrap = 1;
1187         }
1188         qeth_l2_stop_card(card, recovery_mode);
1189         rc  = ccw_device_set_offline(CARD_DDEV(card));
1190         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1191         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1192         if (!rc)
1193                 rc = (rc2) ? rc2 : rc3;
1194         if (rc)
1195                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1196         qdio_free(CARD_DDEV(card));
1197         if (recover_flag == CARD_STATE_UP)
1198                 card->state = CARD_STATE_RECOVER;
1199         /* let user_space know that device is offline */
1200         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1201         mutex_unlock(&card->conf_mutex);
1202         mutex_unlock(&card->discipline_mutex);
1203         return 0;
1204 }
1205
1206 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1207 {
1208         return __qeth_l2_set_offline(cgdev, 0);
1209 }
1210
1211 static int qeth_l2_recover(void *ptr)
1212 {
1213         struct qeth_card *card;
1214         int rc = 0;
1215
1216         card = (struct qeth_card *) ptr;
1217         QETH_CARD_TEXT(card, 2, "recover1");
1218         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1219                 return 0;
1220         QETH_CARD_TEXT(card, 2, "recover2");
1221         dev_warn(&card->gdev->dev,
1222                 "A recovery process has been started for the device\n");
1223         qeth_set_recovery_task(card);
1224         __qeth_l2_set_offline(card->gdev, 1);
1225         rc = __qeth_l2_set_online(card->gdev, 1);
1226         if (!rc)
1227                 dev_info(&card->gdev->dev,
1228                         "Device successfully recovered!\n");
1229         else {
1230                 qeth_close_dev(card);
1231                 dev_warn(&card->gdev->dev, "The qeth device driver "
1232                                 "failed to recover an error on the device\n");
1233         }
1234         qeth_clear_recovery_task(card);
1235         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1236         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1237         return 0;
1238 }
1239
1240 static int __init qeth_l2_init(void)
1241 {
1242         pr_info("register layer 2 discipline\n");
1243         return 0;
1244 }
1245
1246 static void __exit qeth_l2_exit(void)
1247 {
1248         pr_info("unregister layer 2 discipline\n");
1249 }
1250
1251 static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev)
1252 {
1253         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1254
1255         if (card->dev)
1256                 netif_device_detach(card->dev);
1257         qeth_set_allowed_threads(card, 0, 1);
1258         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1259         if (gdev->state == CCWGROUP_OFFLINE)
1260                 return 0;
1261         if (card->state == CARD_STATE_UP) {
1262                 if (card->info.hwtrap)
1263                         qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1264                 __qeth_l2_set_offline(card->gdev, 1);
1265         } else
1266                 __qeth_l2_set_offline(card->gdev, 0);
1267         return 0;
1268 }
1269
1270 static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
1271 {
1272         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1273         int rc = 0;
1274
1275         if (gdev->state == CCWGROUP_OFFLINE)
1276                 goto out;
1277
1278         if (card->state == CARD_STATE_RECOVER) {
1279                 rc = __qeth_l2_set_online(card->gdev, 1);
1280                 if (rc) {
1281                         rtnl_lock();
1282                         dev_close(card->dev);
1283                         rtnl_unlock();
1284                 }
1285         } else
1286                 rc = __qeth_l2_set_online(card->gdev, 0);
1287 out:
1288         qeth_set_allowed_threads(card, 0xffffffff, 0);
1289         if (card->dev)
1290                 netif_device_attach(card->dev);
1291         if (rc)
1292                 dev_warn(&card->gdev->dev, "The qeth device driver "
1293                         "failed to recover an error on the device\n");
1294         return rc;
1295 }
1296
1297 /* Returns zero if the command is successfully "consumed" */
1298 static int qeth_l2_control_event(struct qeth_card *card,
1299                                         struct qeth_ipa_cmd *cmd)
1300 {
1301         switch (cmd->hdr.command) {
1302         case IPA_CMD_SETBRIDGEPORT_OSA:
1303         case IPA_CMD_SETBRIDGEPORT_IQD:
1304                 if (cmd->data.sbp.hdr.command_code ==
1305                                 IPA_SBP_BRIDGE_PORT_STATE_CHANGE) {
1306                         qeth_bridge_state_change(card, cmd);
1307                         return 0;
1308                 } else
1309                         return 1;
1310         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
1311                 qeth_bridge_host_event(card, cmd);
1312                 return 0;
1313         default:
1314                 return 1;
1315         }
1316 }
1317
1318 struct qeth_discipline qeth_l2_discipline = {
1319         .devtype = &qeth_l2_devtype,
1320         .start_poll = qeth_qdio_start_poll,
1321         .input_handler = (qdio_handler_t *) qeth_qdio_input_handler,
1322         .output_handler = (qdio_handler_t *) qeth_qdio_output_handler,
1323         .process_rx_buffer = qeth_l2_process_inbound_buffer,
1324         .recover = qeth_l2_recover,
1325         .setup = qeth_l2_probe_device,
1326         .remove = qeth_l2_remove_device,
1327         .set_online = qeth_l2_set_online,
1328         .set_offline = qeth_l2_set_offline,
1329         .freeze = qeth_l2_pm_suspend,
1330         .thaw = qeth_l2_pm_resume,
1331         .restore = qeth_l2_pm_resume,
1332         .do_ioctl = NULL,
1333         .control_event_handler = qeth_l2_control_event,
1334 };
1335 EXPORT_SYMBOL_GPL(qeth_l2_discipline);
1336
1337 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1338                            struct qeth_cmd_buffer *iob)
1339 {
1340         unsigned long flags;
1341         int rc = 0;
1342
1343         QETH_CARD_TEXT(card, 5, "osndctrd");
1344
1345         wait_event(card->wait_q,
1346                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1347         qeth_prepare_control_data(card, len, iob);
1348         QETH_CARD_TEXT(card, 6, "osnoirqp");
1349         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1350         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1351                               (addr_t) iob, 0, 0);
1352         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1353         if (rc) {
1354                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1355                            "ccw_device_start rc = %i\n", rc);
1356                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1357                 qeth_release_buffer(iob->channel, iob);
1358                 atomic_set(&card->write.irq_pending, 0);
1359                 wake_up(&card->wait_q);
1360         }
1361         return rc;
1362 }
1363
1364 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1365                         struct qeth_cmd_buffer *iob, int data_len)
1366 {
1367         u16 s1, s2;
1368
1369         QETH_CARD_TEXT(card, 4, "osndipa");
1370
1371         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1372         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1373         s2 = (u16)data_len;
1374         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1375         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1376         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1377         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1378         return qeth_osn_send_control_data(card, s1, iob);
1379 }
1380
1381 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1382 {
1383         struct qeth_cmd_buffer *iob;
1384         struct qeth_card *card;
1385         int rc;
1386
1387         if (!dev)
1388                 return -ENODEV;
1389         card = dev->ml_priv;
1390         if (!card)
1391                 return -ENODEV;
1392         QETH_CARD_TEXT(card, 2, "osnsdmc");
1393         if (!qeth_card_hw_is_reachable(card))
1394                 return -ENODEV;
1395         iob = qeth_wait_for_buffer(&card->write);
1396         memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1397         rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1398         return rc;
1399 }
1400 EXPORT_SYMBOL(qeth_osn_assist);
1401
1402 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1403                   int (*assist_cb)(struct net_device *, void *),
1404                   int (*data_cb)(struct sk_buff *))
1405 {
1406         struct qeth_card *card;
1407
1408         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1409         if (*dev == NULL)
1410                 return -ENODEV;
1411         card = (*dev)->ml_priv;
1412         if (!card)
1413                 return -ENODEV;
1414         QETH_CARD_TEXT(card, 2, "osnreg");
1415         if ((assist_cb == NULL) || (data_cb == NULL))
1416                 return -EINVAL;
1417         card->osn_info.assist_cb = assist_cb;
1418         card->osn_info.data_cb = data_cb;
1419         return 0;
1420 }
1421 EXPORT_SYMBOL(qeth_osn_register);
1422
1423 void qeth_osn_deregister(struct net_device *dev)
1424 {
1425         struct qeth_card *card;
1426
1427         if (!dev)
1428                 return;
1429         card = dev->ml_priv;
1430         if (!card)
1431                 return;
1432         QETH_CARD_TEXT(card, 2, "osndereg");
1433         card->osn_info.assist_cb = NULL;
1434         card->osn_info.data_cb = NULL;
1435         return;
1436 }
1437 EXPORT_SYMBOL(qeth_osn_deregister);
1438
1439 /* SETBRIDGEPORT support, async notifications */
1440
1441 enum qeth_an_event_type {anev_reg_unreg, anev_abort, anev_reset};
1442
1443 /**
1444  * qeth_bridge_emit_host_event() - bridgeport address change notification
1445  * @card:  qeth_card structure pointer, for udev events.
1446  * @evtype:  "normal" register/unregister, or abort, or reset. For abort
1447  *            and reset token and addr_lnid are unused and may be NULL.
1448  * @code:  event bitmask: high order bit 0x80 value 1 means removal of an
1449  *                        object, 0 - addition of an object.
1450  *                        0x01 - VLAN, 0x02 - MAC, 0x03 - VLAN and MAC.
1451  * @token: "network token" structure identifying physical address of the port.
1452  * @addr_lnid: pointer to structure with MAC address and VLAN ID.
1453  *
1454  * This function is called when registrations and deregistrations are
1455  * reported by the hardware, and also when notifications are enabled -
1456  * for all currently registered addresses.
1457  */
1458 static void qeth_bridge_emit_host_event(struct qeth_card *card,
1459         enum qeth_an_event_type evtype,
1460         u8 code, struct net_if_token *token, struct mac_addr_lnid *addr_lnid)
1461 {
1462         char str[7][32];
1463         char *env[8];
1464         int i = 0;
1465
1466         switch (evtype) {
1467         case anev_reg_unreg:
1468                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=%s",
1469                                 (code & IPA_ADDR_CHANGE_CODE_REMOVAL)
1470                                 ? "deregister" : "register");
1471                 env[i] = str[i]; i++;
1472                 if (code & IPA_ADDR_CHANGE_CODE_VLANID) {
1473                         snprintf(str[i], sizeof(str[i]), "VLAN=%d",
1474                                 addr_lnid->lnid);
1475                         env[i] = str[i]; i++;
1476                 }
1477                 if (code & IPA_ADDR_CHANGE_CODE_MACADDR) {
1478                         snprintf(str[i], sizeof(str[i]), "MAC=%pM",
1479                                 addr_lnid->mac);
1480                         env[i] = str[i]; i++;
1481                 }
1482                 snprintf(str[i], sizeof(str[i]), "NTOK_BUSID=%x.%x.%04x",
1483                         token->cssid, token->ssid, token->devnum);
1484                 env[i] = str[i]; i++;
1485                 snprintf(str[i], sizeof(str[i]), "NTOK_IID=%02x", token->iid);
1486                 env[i] = str[i]; i++;
1487                 snprintf(str[i], sizeof(str[i]), "NTOK_CHPID=%02x",
1488                                 token->chpid);
1489                 env[i] = str[i]; i++;
1490                 snprintf(str[i], sizeof(str[i]), "NTOK_CHID=%04x", token->chid);
1491                 env[i] = str[i]; i++;
1492                 break;
1493         case anev_abort:
1494                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=abort");
1495                 env[i] = str[i]; i++;
1496                 break;
1497         case anev_reset:
1498                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=reset");
1499                 env[i] = str[i]; i++;
1500                 break;
1501         }
1502         env[i] = NULL;
1503         kobject_uevent_env(&card->gdev->dev.kobj, KOBJ_CHANGE, env);
1504 }
1505
1506 struct qeth_bridge_state_data {
1507         struct work_struct worker;
1508         struct qeth_card *card;
1509         struct qeth_sbp_state_change qports;
1510 };
1511
1512 static void qeth_bridge_state_change_worker(struct work_struct *work)
1513 {
1514         struct qeth_bridge_state_data *data =
1515                 container_of(work, struct qeth_bridge_state_data, worker);
1516         /* We are only interested in the first entry - local port */
1517         struct qeth_sbp_port_entry *entry = &data->qports.entry[0];
1518         char env_locrem[32];
1519         char env_role[32];
1520         char env_state[32];
1521         char *env[] = {
1522                 env_locrem,
1523                 env_role,
1524                 env_state,
1525                 NULL
1526         };
1527
1528         /* Role should not change by itself, but if it did, */
1529         /* information from the hardware is authoritative.  */
1530         mutex_lock(&data->card->conf_mutex);
1531         data->card->options.sbp.role = entry->role;
1532         mutex_unlock(&data->card->conf_mutex);
1533
1534         snprintf(env_locrem, sizeof(env_locrem), "BRIDGEPORT=statechange");
1535         snprintf(env_role, sizeof(env_role), "ROLE=%s",
1536                 (entry->role == QETH_SBP_ROLE_NONE) ? "none" :
1537                 (entry->role == QETH_SBP_ROLE_PRIMARY) ? "primary" :
1538                 (entry->role == QETH_SBP_ROLE_SECONDARY) ? "secondary" :
1539                 "<INVALID>");
1540         snprintf(env_state, sizeof(env_state), "STATE=%s",
1541                 (entry->state == QETH_SBP_STATE_INACTIVE) ? "inactive" :
1542                 (entry->state == QETH_SBP_STATE_STANDBY) ? "standby" :
1543                 (entry->state == QETH_SBP_STATE_ACTIVE) ? "active" :
1544                 "<INVALID>");
1545         kobject_uevent_env(&data->card->gdev->dev.kobj,
1546                                 KOBJ_CHANGE, env);
1547         kfree(data);
1548 }
1549
1550 static void qeth_bridge_state_change(struct qeth_card *card,
1551                                         struct qeth_ipa_cmd *cmd)
1552 {
1553         struct qeth_sbp_state_change *qports =
1554                  &cmd->data.sbp.data.state_change;
1555         struct qeth_bridge_state_data *data;
1556         int extrasize;
1557
1558         QETH_CARD_TEXT(card, 2, "brstchng");
1559         if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1560                 QETH_CARD_TEXT_(card, 2, "BPsz%04x", qports->entry_length);
1561                 return;
1562         }
1563         extrasize = sizeof(struct qeth_sbp_port_entry) * qports->num_entries;
1564         data = kzalloc(sizeof(struct qeth_bridge_state_data) + extrasize,
1565                 GFP_ATOMIC);
1566         if (!data) {
1567                 QETH_CARD_TEXT(card, 2, "BPSalloc");
1568                 return;
1569         }
1570         INIT_WORK(&data->worker, qeth_bridge_state_change_worker);
1571         data->card = card;
1572         memcpy(&data->qports, qports,
1573                         sizeof(struct qeth_sbp_state_change) + extrasize);
1574         queue_work(qeth_wq, &data->worker);
1575 }
1576
1577 struct qeth_bridge_host_data {
1578         struct work_struct worker;
1579         struct qeth_card *card;
1580         struct qeth_ipacmd_addr_change hostevs;
1581 };
1582
1583 static void qeth_bridge_host_event_worker(struct work_struct *work)
1584 {
1585         struct qeth_bridge_host_data *data =
1586                 container_of(work, struct qeth_bridge_host_data, worker);
1587         int i;
1588
1589         if (data->hostevs.lost_event_mask) {
1590                 dev_info(&data->card->gdev->dev,
1591 "Address notification from the Bridge Port stopped %s (%s)\n",
1592                         data->card->dev->name,
1593                         (data->hostevs.lost_event_mask == 0x01)
1594                         ? "Overflow"
1595                         : (data->hostevs.lost_event_mask == 0x02)
1596                         ? "Bridge port state change"
1597                         : "Unknown reason");
1598                 mutex_lock(&data->card->conf_mutex);
1599                 data->card->options.sbp.hostnotification = 0;
1600                 mutex_unlock(&data->card->conf_mutex);
1601                 qeth_bridge_emit_host_event(data->card, anev_abort,
1602                         0, NULL, NULL);
1603         } else
1604                 for (i = 0; i < data->hostevs.num_entries; i++) {
1605                         struct qeth_ipacmd_addr_change_entry *entry =
1606                                         &data->hostevs.entry[i];
1607                         qeth_bridge_emit_host_event(data->card,
1608                                         anev_reg_unreg,
1609                                         entry->change_code,
1610                                         &entry->token, &entry->addr_lnid);
1611                 }
1612         kfree(data);
1613 }
1614
1615 static void qeth_bridge_host_event(struct qeth_card *card,
1616                                         struct qeth_ipa_cmd *cmd)
1617 {
1618         struct qeth_ipacmd_addr_change *hostevs =
1619                  &cmd->data.addrchange;
1620         struct qeth_bridge_host_data *data;
1621         int extrasize;
1622
1623         QETH_CARD_TEXT(card, 2, "brhostev");
1624         if (cmd->hdr.return_code != 0x0000) {
1625                 if (cmd->hdr.return_code == 0x0010) {
1626                         if (hostevs->lost_event_mask == 0x00)
1627                                 hostevs->lost_event_mask = 0xff;
1628                 } else {
1629                         QETH_CARD_TEXT_(card, 2, "BPHe%04x",
1630                                 cmd->hdr.return_code);
1631                         return;
1632                 }
1633         }
1634         extrasize = sizeof(struct qeth_ipacmd_addr_change_entry) *
1635                                                 hostevs->num_entries;
1636         data = kzalloc(sizeof(struct qeth_bridge_host_data) + extrasize,
1637                 GFP_ATOMIC);
1638         if (!data) {
1639                 QETH_CARD_TEXT(card, 2, "BPHalloc");
1640                 return;
1641         }
1642         INIT_WORK(&data->worker, qeth_bridge_host_event_worker);
1643         data->card = card;
1644         memcpy(&data->hostevs, hostevs,
1645                         sizeof(struct qeth_ipacmd_addr_change) + extrasize);
1646         queue_work(qeth_wq, &data->worker);
1647 }
1648
1649 /* SETBRIDGEPORT support; sending commands */
1650
1651 struct _qeth_sbp_cbctl {
1652         u16 ipa_rc;
1653         u16 cmd_rc;
1654         union {
1655                 u32 supported;
1656                 struct {
1657                         enum qeth_sbp_roles *role;
1658                         enum qeth_sbp_states *state;
1659                 } qports;
1660         } data;
1661 };
1662
1663 /**
1664  * qeth_bridgeport_makerc() - derive "traditional" error from hardware codes.
1665  * @card:                     qeth_card structure pointer, for debug messages.
1666  * @cbctl:                    state structure with hardware return codes.
1667  * @setcmd:                   IPA command code
1668  *
1669  * Returns negative errno-compatible error indication or 0 on success.
1670  */
1671 static int qeth_bridgeport_makerc(struct qeth_card *card,
1672         struct _qeth_sbp_cbctl *cbctl, enum qeth_ipa_sbp_cmd setcmd)
1673 {
1674         int rc;
1675         int is_iqd = (card->info.type == QETH_CARD_TYPE_IQD);
1676
1677         if ((is_iqd && (cbctl->ipa_rc == IPA_RC_SUCCESS)) ||
1678             (!is_iqd && (cbctl->ipa_rc == cbctl->cmd_rc)))
1679                 switch (cbctl->cmd_rc) {
1680                 case IPA_RC_SUCCESS:
1681                         rc = 0;
1682                         break;
1683                 case IPA_RC_L2_UNSUPPORTED_CMD:
1684                 case IPA_RC_UNSUPPORTED_COMMAND:
1685                         rc = -EOPNOTSUPP;
1686                         break;
1687                 case IPA_RC_SBP_OSA_NOT_CONFIGURED:
1688                 case IPA_RC_SBP_IQD_NOT_CONFIGURED:
1689                         rc = -ENODEV; /* maybe not the best code here? */
1690                         dev_err(&card->gdev->dev,
1691         "The device is not configured as a Bridge Port\n");
1692                         break;
1693                 case IPA_RC_SBP_OSA_OS_MISMATCH:
1694                 case IPA_RC_SBP_IQD_OS_MISMATCH:
1695                         rc = -EPERM;
1696                         dev_err(&card->gdev->dev,
1697         "A Bridge Port is already configured by a different operating system\n");
1698                         break;
1699                 case IPA_RC_SBP_OSA_ANO_DEV_PRIMARY:
1700                 case IPA_RC_SBP_IQD_ANO_DEV_PRIMARY:
1701                         switch (setcmd) {
1702                         case IPA_SBP_SET_PRIMARY_BRIDGE_PORT:
1703                                 rc = -EEXIST;
1704                                 dev_err(&card->gdev->dev,
1705         "The LAN already has a primary Bridge Port\n");
1706                                 break;
1707                         case IPA_SBP_SET_SECONDARY_BRIDGE_PORT:
1708                                 rc = -EBUSY;
1709                                 dev_err(&card->gdev->dev,
1710         "The device is already a primary Bridge Port\n");
1711                                 break;
1712                         default:
1713                                 rc = -EIO;
1714                         }
1715                         break;
1716                 case IPA_RC_SBP_OSA_CURRENT_SECOND:
1717                 case IPA_RC_SBP_IQD_CURRENT_SECOND:
1718                         rc = -EBUSY;
1719                         dev_err(&card->gdev->dev,
1720         "The device is already a secondary Bridge Port\n");
1721                         break;
1722                 case IPA_RC_SBP_OSA_LIMIT_SECOND:
1723                 case IPA_RC_SBP_IQD_LIMIT_SECOND:
1724                         rc = -EEXIST;
1725                         dev_err(&card->gdev->dev,
1726         "The LAN cannot have more secondary Bridge Ports\n");
1727                         break;
1728                 case IPA_RC_SBP_OSA_CURRENT_PRIMARY:
1729                 case IPA_RC_SBP_IQD_CURRENT_PRIMARY:
1730                         rc = -EBUSY;
1731                         dev_err(&card->gdev->dev,
1732         "The device is already a primary Bridge Port\n");
1733                         break;
1734                 case IPA_RC_SBP_OSA_NOT_AUTHD_BY_ZMAN:
1735                 case IPA_RC_SBP_IQD_NOT_AUTHD_BY_ZMAN:
1736                         rc = -EACCES;
1737                         dev_err(&card->gdev->dev,
1738         "The device is not authorized to be a Bridge Port\n");
1739                         break;
1740                 default:
1741                         rc = -EIO;
1742                 }
1743         else
1744                 switch (cbctl->ipa_rc) {
1745                 case IPA_RC_NOTSUPP:
1746                         rc = -EOPNOTSUPP;
1747                         break;
1748                 case IPA_RC_UNSUPPORTED_COMMAND:
1749                         rc = -EOPNOTSUPP;
1750                         break;
1751                 default:
1752                         rc = -EIO;
1753                 }
1754
1755         if (rc) {
1756                 QETH_CARD_TEXT_(card, 2, "SBPi%04x", cbctl->ipa_rc);
1757                 QETH_CARD_TEXT_(card, 2, "SBPc%04x", cbctl->cmd_rc);
1758         }
1759         return rc;
1760 }
1761
1762 static struct qeth_cmd_buffer *qeth_sbp_build_cmd(struct qeth_card *card,
1763                                                   enum qeth_ipa_sbp_cmd sbp_cmd,
1764                                                   unsigned int cmd_length)
1765 {
1766         enum qeth_ipa_cmds ipa_cmd = (card->info.type == QETH_CARD_TYPE_IQD) ?
1767                                         IPA_CMD_SETBRIDGEPORT_IQD :
1768                                         IPA_CMD_SETBRIDGEPORT_OSA;
1769         struct qeth_cmd_buffer *iob;
1770         struct qeth_ipa_cmd *cmd;
1771
1772         iob = qeth_get_ipacmd_buffer(card, ipa_cmd, 0);
1773         if (!iob)
1774                 return iob;
1775         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
1776         cmd->data.sbp.hdr.cmdlength = sizeof(struct qeth_ipacmd_sbp_hdr) +
1777                                       cmd_length;
1778         cmd->data.sbp.hdr.command_code = sbp_cmd;
1779         cmd->data.sbp.hdr.used_total = 1;
1780         cmd->data.sbp.hdr.seq_no = 1;
1781         return iob;
1782 }
1783
1784 static int qeth_bridgeport_query_support_cb(struct qeth_card *card,
1785         struct qeth_reply *reply, unsigned long data)
1786 {
1787         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1788         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1789         QETH_CARD_TEXT(card, 2, "brqsupcb");
1790         cbctl->ipa_rc = cmd->hdr.return_code;
1791         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1792         if ((cbctl->ipa_rc == 0) && (cbctl->cmd_rc == 0)) {
1793                 cbctl->data.supported =
1794                         cmd->data.sbp.data.query_cmds_supp.supported_cmds;
1795         } else {
1796                 cbctl->data.supported = 0;
1797         }
1798         return 0;
1799 }
1800
1801 /**
1802  * qeth_bridgeport_query_support() - store bitmask of supported subfunctions.
1803  * @card:                            qeth_card structure pointer.
1804  *
1805  * Sets bitmask of supported setbridgeport subfunctions in the qeth_card
1806  * strucutre: card->options.sbp.supported_funcs.
1807  */
1808 static void qeth_bridgeport_query_support(struct qeth_card *card)
1809 {
1810         struct qeth_cmd_buffer *iob;
1811         struct _qeth_sbp_cbctl cbctl;
1812
1813         QETH_CARD_TEXT(card, 2, "brqsuppo");
1814         iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_COMMANDS_SUPPORTED,
1815                                  sizeof(struct qeth_sbp_query_cmds_supp));
1816         if (!iob)
1817                 return;
1818         if (qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_support_cb,
1819                                                         (void *)&cbctl) ||
1820             qeth_bridgeport_makerc(card, &cbctl,
1821                                         IPA_SBP_QUERY_COMMANDS_SUPPORTED)) {
1822                 /* non-zero makerc signifies failure, and produce messages */
1823                 card->options.sbp.role = QETH_SBP_ROLE_NONE;
1824                 return;
1825         }
1826         card->options.sbp.supported_funcs = cbctl.data.supported;
1827 }
1828
1829 static int qeth_bridgeport_query_ports_cb(struct qeth_card *card,
1830         struct qeth_reply *reply, unsigned long data)
1831 {
1832         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1833         struct qeth_sbp_query_ports *qports = &cmd->data.sbp.data.query_ports;
1834         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1835
1836         QETH_CARD_TEXT(card, 2, "brqprtcb");
1837         cbctl->ipa_rc = cmd->hdr.return_code;
1838         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1839         if ((cbctl->ipa_rc != 0) || (cbctl->cmd_rc != 0))
1840                 return 0;
1841         if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1842                 cbctl->cmd_rc = 0xffff;
1843                 QETH_CARD_TEXT_(card, 2, "SBPs%04x", qports->entry_length);
1844                 return 0;
1845         }
1846         /* first entry contains the state of the local port */
1847         if (qports->num_entries > 0) {
1848                 if (cbctl->data.qports.role)
1849                         *cbctl->data.qports.role = qports->entry[0].role;
1850                 if (cbctl->data.qports.state)
1851                         *cbctl->data.qports.state = qports->entry[0].state;
1852         }
1853         return 0;
1854 }
1855
1856 /**
1857  * qeth_bridgeport_query_ports() - query local bridgeport status.
1858  * @card:                          qeth_card structure pointer.
1859  * @role:   Role of the port: 0-none, 1-primary, 2-secondary.
1860  * @state:  State of the port: 0-inactive, 1-standby, 2-active.
1861  *
1862  * Returns negative errno-compatible error indication or 0 on success.
1863  *
1864  * 'role' and 'state' are not updated in case of hardware operation failure.
1865  */
1866 int qeth_bridgeport_query_ports(struct qeth_card *card,
1867         enum qeth_sbp_roles *role, enum qeth_sbp_states *state)
1868 {
1869         int rc = 0;
1870         struct qeth_cmd_buffer *iob;
1871         struct _qeth_sbp_cbctl cbctl = {
1872                 .data = {
1873                         .qports = {
1874                                 .role = role,
1875                                 .state = state,
1876                         },
1877                 },
1878         };
1879
1880         QETH_CARD_TEXT(card, 2, "brqports");
1881         if (!(card->options.sbp.supported_funcs & IPA_SBP_QUERY_BRIDGE_PORTS))
1882                 return -EOPNOTSUPP;
1883         iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_BRIDGE_PORTS, 0);
1884         if (!iob)
1885                 return -ENOMEM;
1886         rc = qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_ports_cb,
1887                                 (void *)&cbctl);
1888         if (rc < 0)
1889                 return rc;
1890         return qeth_bridgeport_makerc(card, &cbctl, IPA_SBP_QUERY_BRIDGE_PORTS);
1891 }
1892 EXPORT_SYMBOL_GPL(qeth_bridgeport_query_ports);
1893
1894 static int qeth_bridgeport_set_cb(struct qeth_card *card,
1895         struct qeth_reply *reply, unsigned long data)
1896 {
1897         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
1898         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1899         QETH_CARD_TEXT(card, 2, "brsetrcb");
1900         cbctl->ipa_rc = cmd->hdr.return_code;
1901         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1902         return 0;
1903 }
1904
1905 /**
1906  * qeth_bridgeport_setrole() - Assign primary role to the port.
1907  * @card:                      qeth_card structure pointer.
1908  * @role:                      Role to assign.
1909  *
1910  * Returns negative errno-compatible error indication or 0 on success.
1911  */
1912 int qeth_bridgeport_setrole(struct qeth_card *card, enum qeth_sbp_roles role)
1913 {
1914         int rc = 0;
1915         int cmdlength;
1916         struct qeth_cmd_buffer *iob;
1917         struct _qeth_sbp_cbctl cbctl;
1918         enum qeth_ipa_sbp_cmd setcmd;
1919
1920         QETH_CARD_TEXT(card, 2, "brsetrol");
1921         switch (role) {
1922         case QETH_SBP_ROLE_NONE:
1923                 setcmd = IPA_SBP_RESET_BRIDGE_PORT_ROLE;
1924                 cmdlength = sizeof(struct qeth_sbp_reset_role);
1925                 break;
1926         case QETH_SBP_ROLE_PRIMARY:
1927                 setcmd = IPA_SBP_SET_PRIMARY_BRIDGE_PORT;
1928                 cmdlength = sizeof(struct qeth_sbp_set_primary);
1929                 break;
1930         case QETH_SBP_ROLE_SECONDARY:
1931                 setcmd = IPA_SBP_SET_SECONDARY_BRIDGE_PORT;
1932                 cmdlength = sizeof(struct qeth_sbp_set_secondary);
1933                 break;
1934         default:
1935                 return -EINVAL;
1936         }
1937         if (!(card->options.sbp.supported_funcs & setcmd))
1938                 return -EOPNOTSUPP;
1939         iob = qeth_sbp_build_cmd(card, setcmd, cmdlength);
1940         if (!iob)
1941                 return -ENOMEM;
1942         rc = qeth_send_ipa_cmd(card, iob, qeth_bridgeport_set_cb,
1943                                 (void *)&cbctl);
1944         if (rc < 0)
1945                 return rc;
1946         return qeth_bridgeport_makerc(card, &cbctl, setcmd);
1947 }
1948
1949 /**
1950  * qeth_anset_makerc() - derive "traditional" error from hardware codes.
1951  * @card:                     qeth_card structure pointer, for debug messages.
1952  *
1953  * Returns negative errno-compatible error indication or 0 on success.
1954  */
1955 static int qeth_anset_makerc(struct qeth_card *card, int pnso_rc, u16 response)
1956 {
1957         int rc;
1958
1959         if (pnso_rc == 0)
1960                 switch (response) {
1961                 case 0x0001:
1962                         rc = 0;
1963                         break;
1964                 case 0x0004:
1965                 case 0x0100:
1966                 case 0x0106:
1967                         rc = -EOPNOTSUPP;
1968                         dev_err(&card->gdev->dev,
1969                                 "Setting address notification failed\n");
1970                         break;
1971                 case 0x0107:
1972                         rc = -EAGAIN;
1973                         break;
1974                 default:
1975                         rc = -EIO;
1976                 }
1977         else
1978                 rc = -EIO;
1979
1980         if (rc) {
1981                 QETH_CARD_TEXT_(card, 2, "SBPp%04x", pnso_rc);
1982                 QETH_CARD_TEXT_(card, 2, "SBPr%04x", response);
1983         }
1984         return rc;
1985 }
1986
1987 static void qeth_bridgeport_an_set_cb(void *priv,
1988                 enum qdio_brinfo_entry_type type, void *entry)
1989 {
1990         struct qeth_card *card = (struct qeth_card *)priv;
1991         struct qdio_brinfo_entry_l2 *l2entry;
1992         u8 code;
1993
1994         if (type != l2_addr_lnid) {
1995                 WARN_ON_ONCE(1);
1996                 return;
1997         }
1998
1999         l2entry = (struct qdio_brinfo_entry_l2 *)entry;
2000         code = IPA_ADDR_CHANGE_CODE_MACADDR;
2001         if (l2entry->addr_lnid.lnid)
2002                 code |= IPA_ADDR_CHANGE_CODE_VLANID;
2003         qeth_bridge_emit_host_event(card, anev_reg_unreg, code,
2004                 (struct net_if_token *)&l2entry->nit,
2005                 (struct mac_addr_lnid *)&l2entry->addr_lnid);
2006 }
2007
2008 /**
2009  * qeth_bridgeport_an_set() - Enable or disable bridgeport address notification
2010  * @card:                     qeth_card structure pointer.
2011  * @enable:                   0 - disable, non-zero - enable notifications
2012  *
2013  * Returns negative errno-compatible error indication or 0 on success.
2014  *
2015  * On enable, emits a series of address notifications udev events for all
2016  * currently registered hosts.
2017  */
2018 int qeth_bridgeport_an_set(struct qeth_card *card, int enable)
2019 {
2020         int rc;
2021         u16 response;
2022         struct ccw_device *ddev;
2023         struct subchannel_id schid;
2024
2025         if (!card)
2026                 return -EINVAL;
2027         if (!card->options.sbp.supported_funcs)
2028                 return -EOPNOTSUPP;
2029         ddev = CARD_DDEV(card);
2030         ccw_device_get_schid(ddev, &schid);
2031
2032         if (enable) {
2033                 qeth_bridge_emit_host_event(card, anev_reset, 0, NULL, NULL);
2034                 rc = qdio_pnso_brinfo(schid, 1, &response,
2035                         qeth_bridgeport_an_set_cb, card);
2036         } else
2037                 rc = qdio_pnso_brinfo(schid, 0, &response, NULL, NULL);
2038         return qeth_anset_makerc(card, rc, response);
2039 }
2040 EXPORT_SYMBOL_GPL(qeth_bridgeport_an_set);
2041
2042 module_init(qeth_l2_init);
2043 module_exit(qeth_l2_exit);
2044 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
2045 MODULE_DESCRIPTION("qeth layer 2 discipline");
2046 MODULE_LICENSE("GPL");