drivers/s390/net/qeth_l2_main.c

   1 /*
   2  *    Copyright IBM Corp. 2007, 2009
   3  *    Author(s): Utz Bacher <[email protected]>,
   4  *               Frank Pavlic <[email protected]>,
   5  *               Thomas Spatzier <[email protected]>,
   6  *               Frank Blaschka <[email protected]>
   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/mii.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 "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_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
  38 {
  39         struct qeth_card *card = dev->ml_priv;
  40         struct mii_ioctl_data *mii_data;
  41         int rc = 0;
  42
  43         if (!card)
  44                 return -ENODEV;
  45
  46         if (!qeth_card_hw_is_reachable(card))
  47                 return -ENODEV;
  48
  49         if (card->info.type == QETH_CARD_TYPE_OSN)
  50                 return -EPERM;
  51
  52         switch (cmd) {
  53         case SIOC_QETH_ADP_SET_SNMP_CONTROL:
  54                 rc = qeth_snmp_command(card, rq->ifr_ifru.ifru_data);
  55                 break;
  56         case SIOC_QETH_GET_CARD_TYPE:
  57                 if ((card->info.type == QETH_CARD_TYPE_OSD ||
  58                      card->info.type == QETH_CARD_TYPE_OSM ||
  59                      card->info.type == QETH_CARD_TYPE_OSX) &&
  60                     !card->info.guestlan)
  61                         return 1;
  62                 return 0;
  63                 break;
  64         case SIOCGMIIPHY:
  65                 mii_data = if_mii(rq);
  66                 mii_data->phy_id = 0;
  67                 break;
  68         case SIOCGMIIREG:
  69                 mii_data = if_mii(rq);
  70                 if (mii_data->phy_id != 0)
  71                         rc = -EINVAL;
  72                 else
  73                         mii_data->val_out = qeth_mdio_read(dev,
  74                                 mii_data->phy_id, mii_data->reg_num);
  75                 break;
  76         case SIOC_QETH_QUERY_OAT:
  77                 rc = qeth_query_oat_command(card, rq->ifr_ifru.ifru_data);
  78                 break;
  79         default:
  80                 rc = -EOPNOTSUPP;
  81         }
  82         if (rc)
  83                 QETH_CARD_TEXT_(card, 2, "ioce%d", rc);
  84         return rc;
  85 }
  86
  87 static int qeth_l2_verify_dev(struct net_device *dev)
  88 {
  89         struct qeth_card *card;
  90         unsigned long flags;
  91         int rc = 0;
  92
  93         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
  94         list_for_each_entry(card, &qeth_core_card_list.list, list) {
  95                 if (card->dev == dev) {
  96                         rc = QETH_REAL_CARD;
  97                         break;
  98                 }
  99         }
 100         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
 101
 102         return rc;
 103 }
 104
 105 static struct net_device *qeth_l2_netdev_by_devno(unsigned char *read_dev_no)
 106 {
 107         struct qeth_card *card;
 108         struct net_device *ndev;
 109         __u16 temp_dev_no;
 110         unsigned long flags;
 111         struct ccw_dev_id read_devid;
 112
 113         ndev = NULL;
 114         memcpy(&temp_dev_no, read_dev_no, 2);
 115         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
 116         list_for_each_entry(card, &qeth_core_card_list.list, list) {
 117                 ccw_device_get_id(CARD_RDEV(card), &read_devid);
 118                 if (read_devid.devno == temp_dev_no) {
 119                         ndev = card->dev;
 120                         break;
 121                 }
 122         }
 123         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
 124         return ndev;
 125 }
 126
 127 static int qeth_setdel_makerc(struct qeth_card *card, int retcode)
 128 {
 129         int rc;
 130
 131         if (retcode)
 132                 QETH_CARD_TEXT_(card, 2, "err%04x", retcode);
 133         switch (retcode) {
 134         case IPA_RC_SUCCESS:
 135                 rc = 0;
 136                 break;
 137         case IPA_RC_L2_UNSUPPORTED_CMD:
 138                 rc = -EOPNOTSUPP;
 139                 break;
 140         case IPA_RC_L2_ADDR_TABLE_FULL:
 141                 rc = -ENOSPC;
 142                 break;
 143         case IPA_RC_L2_DUP_MAC:
 144         case IPA_RC_L2_DUP_LAYER3_MAC:
 145                 rc = -EEXIST;
 146                 break;
 147         case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
 148         case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
 149                 rc = -EPERM;
 150                 break;
 151         case IPA_RC_L2_MAC_NOT_FOUND:
 152                 rc = -ENOENT;
 153                 break;
 154         case -ENOMEM:
 155                 rc = -ENOMEM;
 156                 break;
 157         default:
 158                 rc = -EIO;
 159                 break;
 160         }
 161         return rc;
 162 }
 163
 164 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
 165                            enum qeth_ipa_cmds ipacmd)
 166 {
 167         struct qeth_ipa_cmd *cmd;
 168         struct qeth_cmd_buffer *iob;
 169
 170         QETH_CARD_TEXT(card, 2, "L2sdmac");
 171         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 172         if (!iob)
 173                 return -ENOMEM;
 174         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 175         cmd->data.setdelmac.mac_length = OSA_ADDR_LEN;
 176         memcpy(&cmd->data.setdelmac.mac, mac, OSA_ADDR_LEN);
 177         return qeth_setdel_makerc(card, qeth_send_ipa_cmd(card, iob,
 178                                         NULL, NULL));
 179 }
 180
 181 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
 182 {
 183         int rc;
 184
 185         QETH_CARD_TEXT(card, 2, "L2Setmac");
 186         rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC);
 187         if (rc == 0) {
 188                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 189                 memcpy(card->dev->dev_addr, mac, OSA_ADDR_LEN);
 190                 dev_info(&card->gdev->dev,
 191                         "MAC address %pM successfully registered on device %s\n",
 192                         card->dev->dev_addr, card->dev->name);
 193         } else {
 194                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 195                 switch (rc) {
 196                 case -EEXIST:
 197                         dev_warn(&card->gdev->dev,
 198                                 "MAC address %pM already exists\n", mac);
 199                         break;
 200                 case -EPERM:
 201                         dev_warn(&card->gdev->dev,
 202                                 "MAC address %pM is not authorized\n", mac);
 203                         break;
 204                 }
 205         }
 206         return rc;
 207 }
 208
 209 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
 210 {
 211         int rc;
 212
 213         QETH_CARD_TEXT(card, 2, "L2Delmac");
 214         if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
 215                 return 0;
 216         rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC);
 217         if (rc == 0)
 218                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 219         return rc;
 220 }
 221
 222 static int qeth_l2_send_setgroupmac(struct qeth_card *card, __u8 *mac)
 223 {
 224         int rc;
 225
 226         QETH_CARD_TEXT(card, 2, "L2Sgmac");
 227         rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETGMAC);
 228         if (rc == -EEXIST)
 229                 QETH_DBF_MESSAGE(2, "Group MAC %pM already existing on %s\n",
 230                         mac, QETH_CARD_IFNAME(card));
 231         else if (rc)
 232                 QETH_DBF_MESSAGE(2, "Could not set group MAC %pM on %s: %d\n",
 233                         mac, QETH_CARD_IFNAME(card), rc);
 234         return rc;
 235 }
 236
 237 static int qeth_l2_send_delgroupmac(struct qeth_card *card, __u8 *mac)
 238 {
 239         int rc;
 240
 241         QETH_CARD_TEXT(card, 2, "L2Dgmac");
 242         rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELGMAC);
 243         if (rc)
 244                 QETH_DBF_MESSAGE(2,
 245                         "Could not delete group MAC %pM on %s: %d\n",
 246                         mac, QETH_CARD_IFNAME(card), rc);
 247         return rc;
 248 }
 249
 250 static int qeth_l2_write_mac(struct qeth_card *card, struct qeth_mac *mac)
 251 {
 252         if (mac->is_uc) {
 253                 return qeth_l2_send_setdelmac(card, mac->mac_addr,
 254                                                 IPA_CMD_SETVMAC);
 255         } else {
 256                 return qeth_l2_send_setgroupmac(card, mac->mac_addr);
 257         }
 258 }
 259
 260 static int qeth_l2_remove_mac(struct qeth_card *card, struct qeth_mac *mac)
 261 {
 262         if (mac->is_uc) {
 263                 return qeth_l2_send_setdelmac(card, mac->mac_addr,
 264                                                 IPA_CMD_DELVMAC);
 265         } else {
 266                 return qeth_l2_send_delgroupmac(card, mac->mac_addr);
 267         }
 268 }
 269
 270 static void qeth_l2_del_all_macs(struct qeth_card *card)
 271 {
 272         struct qeth_mac *mac;
 273         struct hlist_node *tmp;
 274         int i;
 275
 276         spin_lock_bh(&card->mclock);
 277         hash_for_each_safe(card->mac_htable, i, tmp, mac, hnode) {
 278                 hash_del(&mac->hnode);
 279                 kfree(mac);
 280         }
 281         spin_unlock_bh(&card->mclock);
 282 }
 283
 284 static inline u32 qeth_l2_mac_hash(const u8 *addr)
 285 {
 286         return get_unaligned((u32 *)(&addr[2]));
 287 }
 288
 289 static inline int qeth_l2_get_cast_type(struct qeth_card *card,
 290                         struct sk_buff *skb)
 291 {
 292         if (card->info.type == QETH_CARD_TYPE_OSN)
 293                 return RTN_UNSPEC;
 294         if (is_broadcast_ether_addr(skb->data))
 295                 return RTN_BROADCAST;
 296         if (is_multicast_ether_addr(skb->data))
 297                 return RTN_MULTICAST;
 298         return RTN_UNSPEC;
 299 }
 300
 301 static inline void qeth_l2_hdr_csum(struct qeth_card *card,
 302                                     struct qeth_hdr *hdr, struct sk_buff *skb)
 303 {
 304         struct iphdr *iph = ip_hdr(skb);
 305
 306         /* tcph->check contains already the pseudo hdr checksum
 307          * so just set the header flags
 308          */
 309         if (iph->protocol == IPPROTO_UDP)
 310                 hdr->hdr.l2.flags[1] |= QETH_HDR_EXT_UDP;
 311         hdr->hdr.l2.flags[1] |= QETH_HDR_EXT_CSUM_TRANSP_REQ |
 312                 QETH_HDR_EXT_CSUM_HDR_REQ;
 313         iph->check = 0;
 314         if (card->options.performance_stats)
 315                 card->perf_stats.tx_csum++;
 316 }
 317
 318 static void qeth_l2_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
 319                         struct sk_buff *skb, int cast_type)
 320 {
 321         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
 322
 323         memset(hdr, 0, sizeof(struct qeth_hdr));
 324         hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
 325
 326         /* set byte byte 3 to casting flags */
 327         if (cast_type == RTN_MULTICAST)
 328                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 329         else if (cast_type == RTN_BROADCAST)
 330                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 331         else
 332                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 333
 334         hdr->hdr.l2.pkt_length = skb->len-QETH_HEADER_SIZE;
 335         /* VSWITCH relies on the VLAN
 336          * information to be present in
 337          * the QDIO header */
 338         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
 339                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
 340                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
 341         }
 342 }
 343
 344 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
 345                         struct qeth_reply *reply, unsigned long data)
 346 {
 347         struct qeth_ipa_cmd *cmd;
 348
 349         QETH_CARD_TEXT(card, 2, "L2sdvcb");
 350         cmd = (struct qeth_ipa_cmd *) data;
 351         if (cmd->hdr.return_code) {
 352                 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x. "
 353                           "Continuing\n", cmd->data.setdelvlan.vlan_id,
 354                           QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 355                 QETH_CARD_TEXT_(card, 2, "L2VL%4x", cmd->hdr.command);
 356                 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code);
 357         }
 358         return 0;
 359 }
 360
 361 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
 362                                 enum qeth_ipa_cmds ipacmd)
 363 {
 364         struct qeth_ipa_cmd *cmd;
 365         struct qeth_cmd_buffer *iob;
 366
 367         QETH_CARD_TEXT_(card, 4, "L2sdv%x", ipacmd);
 368         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 369         if (!iob)
 370                 return -ENOMEM;
 371         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 372         cmd->data.setdelvlan.vlan_id = i;
 373         return qeth_send_ipa_cmd(card, iob,
 374                                  qeth_l2_send_setdelvlan_cb, NULL);
 375 }
 376
 377 static void qeth_l2_process_vlans(struct qeth_card *card)
 378 {
 379         struct qeth_vlan_vid *id;
 380         QETH_CARD_TEXT(card, 3, "L2prcvln");
 381         spin_lock_bh(&card->vlanlock);
 382         list_for_each_entry(id, &card->vid_list, list) {
 383                 qeth_l2_send_setdelvlan(card, id->vid, IPA_CMD_SETVLAN);
 384         }
 385         spin_unlock_bh(&card->vlanlock);
 386 }
 387
 388 static int qeth_l2_vlan_rx_add_vid(struct net_device *dev,
 389                                    __be16 proto, u16 vid)
 390 {
 391         struct qeth_card *card = dev->ml_priv;
 392         struct qeth_vlan_vid *id;
 393         int rc;
 394
 395         QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
 396         if (!vid)
 397                 return 0;
 398         if (card->info.type == QETH_CARD_TYPE_OSM) {
 399                 QETH_CARD_TEXT(card, 3, "aidOSM");
 400                 return 0;
 401         }
 402         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 403                 QETH_CARD_TEXT(card, 3, "aidREC");
 404                 return 0;
 405         }
 406         id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
 407         if (id) {
 408                 id->vid = vid;
 409                 rc = qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
 410                 if (rc) {
 411                         kfree(id);
 412                         return rc;
 413                 }
 414                 spin_lock_bh(&card->vlanlock);
 415                 list_add_tail(&id->list, &card->vid_list);
 416                 spin_unlock_bh(&card->vlanlock);
 417         } else {
 418                 return -ENOMEM;
 419         }
 420         return 0;
 421 }
 422
 423 static int qeth_l2_vlan_rx_kill_vid(struct net_device *dev,
 424                                     __be16 proto, u16 vid)
 425 {
 426         struct qeth_vlan_vid *id, *tmpid = NULL;
 427         struct qeth_card *card = dev->ml_priv;
 428         int rc = 0;
 429
 430         QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
 431         if (card->info.type == QETH_CARD_TYPE_OSM) {
 432                 QETH_CARD_TEXT(card, 3, "kidOSM");
 433                 return 0;
 434         }
 435         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 436                 QETH_CARD_TEXT(card, 3, "kidREC");
 437                 return 0;
 438         }
 439         spin_lock_bh(&card->vlanlock);
 440         list_for_each_entry(id, &card->vid_list, list) {
 441                 if (id->vid == vid) {
 442                         list_del(&id->list);
 443                         tmpid = id;
 444                         break;
 445                 }
 446         }
 447         spin_unlock_bh(&card->vlanlock);
 448         if (tmpid) {
 449                 rc = qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 450                 kfree(tmpid);
 451         }
 452         qeth_l2_set_rx_mode(card->dev);
 453         return rc;
 454 }
 455
 456 static void qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
 457 {
 458         QETH_DBF_TEXT(SETUP , 2, "stopcard");
 459         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 460
 461         qeth_set_allowed_threads(card, 0, 1);
 462         if (card->read.state == CH_STATE_UP &&
 463             card->write.state == CH_STATE_UP &&
 464             (card->state == CARD_STATE_UP)) {
 465                 if (recovery_mode &&
 466                     card->info.type != QETH_CARD_TYPE_OSN) {
 467                         qeth_l2_stop(card->dev);
 468                 } else {
 469                         rtnl_lock();
 470                         dev_close(card->dev);
 471                         rtnl_unlock();
 472                 }
 473                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 474                 card->state = CARD_STATE_SOFTSETUP;
 475         }
 476         if (card->state == CARD_STATE_SOFTSETUP) {
 477                 qeth_l2_del_all_macs(card);
 478                 qeth_clear_ipacmd_list(card);
 479                 card->state = CARD_STATE_HARDSETUP;
 480         }
 481         if (card->state == CARD_STATE_HARDSETUP) {
 482                 qeth_qdio_clear_card(card, 0);
 483                 qeth_clear_qdio_buffers(card);
 484                 qeth_clear_working_pool_list(card);
 485                 card->state = CARD_STATE_DOWN;
 486         }
 487         if (card->state == CARD_STATE_DOWN) {
 488                 qeth_clear_cmd_buffers(&card->read);
 489                 qeth_clear_cmd_buffers(&card->write);
 490         }
 491 }
 492
 493 static int qeth_l2_process_inbound_buffer(struct qeth_card *card,
 494                                 int budget, int *done)
 495 {
 496         int work_done = 0;
 497         struct sk_buff *skb;
 498         struct qeth_hdr *hdr;
 499         unsigned int len;
 500
 501         *done = 0;
 502         WARN_ON_ONCE(!budget);
 503         while (budget) {
 504                 skb = qeth_core_get_next_skb(card,
 505                         &card->qdio.in_q->bufs[card->rx.b_index],
 506                         &card->rx.b_element, &card->rx.e_offset, &hdr);
 507                 if (!skb) {
 508                         *done = 1;
 509                         break;
 510                 }
 511                 skb->dev = card->dev;
 512                 switch (hdr->hdr.l2.id) {
 513                 case QETH_HEADER_TYPE_LAYER2:
 514                         skb->pkt_type = PACKET_HOST;
 515                         skb->protocol = eth_type_trans(skb, skb->dev);
 516                         if ((card->dev->features & NETIF_F_RXCSUM)
 517                            && ((hdr->hdr.l2.flags[1] &
 518                                 (QETH_HDR_EXT_CSUM_HDR_REQ |
 519                                    QETH_HDR_EXT_CSUM_TRANSP_REQ)) ==
 520                                 (QETH_HDR_EXT_CSUM_HDR_REQ |
 521                                    QETH_HDR_EXT_CSUM_TRANSP_REQ)))
 522                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 523                         else
 524                                 skb->ip_summed = CHECKSUM_NONE;
 525                         if (skb->protocol == htons(ETH_P_802_2))
 526                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
 527                         len = skb->len;
 528                         napi_gro_receive(&card->napi, skb);
 529                         break;
 530                 case QETH_HEADER_TYPE_OSN:
 531                         if (card->info.type == QETH_CARD_TYPE_OSN) {
 532                                 skb_push(skb, sizeof(struct qeth_hdr));
 533                                 skb_copy_to_linear_data(skb, hdr,
 534                                                 sizeof(struct qeth_hdr));
 535                                 len = skb->len;
 536                                 card->osn_info.data_cb(skb);
 537                                 break;
 538                         }
 539                         /* else unknown */
 540                 default:
 541                         dev_kfree_skb_any(skb);
 542                         QETH_CARD_TEXT(card, 3, "inbunkno");
 543                         QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
 544                         continue;
 545                 }
 546                 work_done++;
 547                 budget--;
 548                 card->stats.rx_packets++;
 549                 card->stats.rx_bytes += len;
 550         }
 551         return work_done;
 552 }
 553
 554 static int qeth_l2_poll(struct napi_struct *napi, int budget)
 555 {
 556         struct qeth_card *card = container_of(napi, struct qeth_card, napi);
 557         int work_done = 0;
 558         struct qeth_qdio_buffer *buffer;
 559         int done;
 560         int new_budget = budget;
 561
 562         if (card->options.performance_stats) {
 563                 card->perf_stats.inbound_cnt++;
 564                 card->perf_stats.inbound_start_time = qeth_get_micros();
 565         }
 566
 567         while (1) {
 568                 if (!card->rx.b_count) {
 569                         card->rx.qdio_err = 0;
 570                         card->rx.b_count = qdio_get_next_buffers(
 571                                 card->data.ccwdev, 0, &card->rx.b_index,
 572                                 &card->rx.qdio_err);
 573                         if (card->rx.b_count <= 0) {
 574                                 card->rx.b_count = 0;
 575                                 break;
 576                         }
 577                         card->rx.b_element =
 578                                 &card->qdio.in_q->bufs[card->rx.b_index]
 579                                 .buffer->element[0];
 580                         card->rx.e_offset = 0;
 581                 }
 582
 583                 while (card->rx.b_count) {
 584                         buffer = &card->qdio.in_q->bufs[card->rx.b_index];
 585                         if (!(card->rx.qdio_err &&
 586                             qeth_check_qdio_errors(card, buffer->buffer,
 587                             card->rx.qdio_err, "qinerr")))
 588                                 work_done += qeth_l2_process_inbound_buffer(
 589                                         card, new_budget, &done);
 590                         else
 591                                 done = 1;
 592
 593                         if (done) {
 594                                 if (card->options.performance_stats)
 595                                         card->perf_stats.bufs_rec++;
 596                                 qeth_put_buffer_pool_entry(card,
 597                                         buffer->pool_entry);
 598                                 qeth_queue_input_buffer(card, card->rx.b_index);
 599                                 card->rx.b_count--;
 600                                 if (card->rx.b_count) {
 601                                         card->rx.b_index =
 602                                                 (card->rx.b_index + 1) %
 603                                                 QDIO_MAX_BUFFERS_PER_Q;
 604                                         card->rx.b_element =
 605                                                 &card->qdio.in_q
 606                                                 ->bufs[card->rx.b_index]
 607                                                 .buffer->element[0];
 608                                         card->rx.e_offset = 0;
 609                                 }
 610                         }
 611
 612                         if (work_done >= budget)
 613                                 goto out;
 614                         else
 615                                 new_budget = budget - work_done;
 616                 }
 617         }
 618
 619         napi_complete(napi);
 620         if (qdio_start_irq(card->data.ccwdev, 0))
 621                 napi_schedule(&card->napi);
 622 out:
 623         if (card->options.performance_stats)
 624                 card->perf_stats.inbound_time += qeth_get_micros() -
 625                         card->perf_stats.inbound_start_time;
 626         return work_done;
 627 }
 628
 629 static int qeth_l2_request_initial_mac(struct qeth_card *card)
 630 {
 631         int rc = 0;
 632         char vendor_pre[] = {0x02, 0x00, 0x00};
 633
 634         QETH_DBF_TEXT(SETUP, 2, "doL2init");
 635         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
 636
 637         if (qeth_is_supported(card, IPA_SETADAPTERPARMS)) {
 638                 rc = qeth_query_setadapterparms(card);
 639                 if (rc) {
 640                         QETH_DBF_MESSAGE(2, "could not query adapter "
 641                                 "parameters on device %s: x%x\n",
 642                                 CARD_BUS_ID(card), rc);
 643                 }
 644         }
 645
 646         if (card->info.type == QETH_CARD_TYPE_IQD ||
 647             card->info.type == QETH_CARD_TYPE_OSM ||
 648             card->info.type == QETH_CARD_TYPE_OSX ||
 649             card->info.guestlan) {
 650                 rc = qeth_setadpparms_change_macaddr(card);
 651                 if (rc) {
 652                         QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
 653                                 "device %s: x%x\n", CARD_BUS_ID(card), rc);
 654                         QETH_DBF_TEXT_(SETUP, 2, "1err%04x", rc);
 655                         return rc;
 656                 }
 657                 QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, OSA_ADDR_LEN);
 658         } else {
 659                 eth_random_addr(card->dev->dev_addr);
 660                 memcpy(card->dev->dev_addr, vendor_pre, 3);
 661         }
 662         return 0;
 663 }
 664
 665 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 666 {
 667         struct sockaddr *addr = p;
 668         struct qeth_card *card = dev->ml_priv;
 669         int rc = 0;
 670
 671         QETH_CARD_TEXT(card, 3, "setmac");
 672
 673         if (qeth_l2_verify_dev(dev) != QETH_REAL_CARD) {
 674                 QETH_CARD_TEXT(card, 3, "setmcINV");
 675                 return -EOPNOTSUPP;
 676         }
 677
 678         if (card->info.type == QETH_CARD_TYPE_OSN ||
 679             card->info.type == QETH_CARD_TYPE_OSM ||
 680             card->info.type == QETH_CARD_TYPE_OSX) {
 681                 QETH_CARD_TEXT(card, 3, "setmcTYP");
 682                 return -EOPNOTSUPP;
 683         }
 684         QETH_CARD_HEX(card, 3, addr->sa_data, OSA_ADDR_LEN);
 685         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 686                 QETH_CARD_TEXT(card, 3, "setmcREC");
 687                 return -ERESTARTSYS;
 688         }
 689         rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
 690         if (!rc || (rc == -ENOENT))
 691                 rc = qeth_l2_send_setmac(card, addr->sa_data);
 692         return rc ? -EINVAL : 0;
 693 }
 694
 695 static void qeth_promisc_to_bridge(struct qeth_card *card)
 696 {
 697         struct net_device *dev = card->dev;
 698         enum qeth_ipa_promisc_modes promisc_mode;
 699         int role;
 700         int rc;
 701
 702         QETH_CARD_TEXT(card, 3, "pmisc2br");
 703
 704         if (!card->options.sbp.reflect_promisc)
 705                 return;
 706         promisc_mode = (dev->flags & IFF_PROMISC) ? SET_PROMISC_MODE_ON
 707                                                 : SET_PROMISC_MODE_OFF;
 708         if (promisc_mode == card->info.promisc_mode)
 709                 return;
 710
 711         if (promisc_mode == SET_PROMISC_MODE_ON) {
 712                 if (card->options.sbp.reflect_promisc_primary)
 713                         role = QETH_SBP_ROLE_PRIMARY;
 714                 else
 715                         role = QETH_SBP_ROLE_SECONDARY;
 716         } else
 717                 role = QETH_SBP_ROLE_NONE;
 718
 719         rc = qeth_bridgeport_setrole(card, role);
 720         QETH_DBF_TEXT_(SETUP, 2, "bpm%c%04x",
 721                         (promisc_mode == SET_PROMISC_MODE_ON) ? '+' : '-', rc);
 722         if (!rc) {
 723                 card->options.sbp.role = role;
 724                 card->info.promisc_mode = promisc_mode;
 725         }
 726
 727 }
 728 /* New MAC address is added to the hash table and marked to be written on card
 729  * only if there is not in the hash table storage already
 730  *
 731 */
 732 static  void
 733 qeth_l2_add_mac(struct qeth_card *card, struct netdev_hw_addr *ha, u8 is_uc)
 734 {
 735         struct qeth_mac *mac;
 736
 737         hash_for_each_possible(card->mac_htable, mac, hnode,
 738                         qeth_l2_mac_hash(ha->addr)) {
 739                 if (is_uc == mac->is_uc &&
 740                     !memcmp(ha->addr, mac->mac_addr, OSA_ADDR_LEN)) {
 741                         mac->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
 742                         return;
 743                 }
 744         }
 745
 746         mac = kzalloc(sizeof(struct qeth_mac), GFP_ATOMIC);
 747
 748         if (!mac)
 749                 return;
 750
 751         memcpy(mac->mac_addr, ha->addr, OSA_ADDR_LEN);
 752         mac->is_uc = is_uc;
 753         mac->disp_flag = QETH_DISP_ADDR_ADD;
 754
 755         hash_add(card->mac_htable, &mac->hnode,
 756                         qeth_l2_mac_hash(mac->mac_addr));
 757
 758 }
 759
 760 static void qeth_l2_set_rx_mode(struct net_device *dev)
 761 {
 762         struct qeth_card *card = dev->ml_priv;
 763         struct netdev_hw_addr *ha;
 764         struct qeth_mac *mac;
 765         struct hlist_node *tmp;
 766         int i;
 767         int rc;
 768
 769         if (card->info.type == QETH_CARD_TYPE_OSN)
 770                 return;
 771
 772         QETH_CARD_TEXT(card, 3, "setmulti");
 773         if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
 774             (card->state != CARD_STATE_UP))
 775                 return;
 776
 777         spin_lock_bh(&card->mclock);
 778
 779         netdev_for_each_mc_addr(ha, dev)
 780                 qeth_l2_add_mac(card, ha, 0);
 781
 782         netdev_for_each_uc_addr(ha, dev)
 783                 qeth_l2_add_mac(card, ha, 1);
 784
 785         hash_for_each_safe(card->mac_htable, i, tmp, mac, hnode) {
 786                 if (mac->disp_flag == QETH_DISP_ADDR_DELETE) {
 787                         qeth_l2_remove_mac(card, mac);
 788                         hash_del(&mac->hnode);
 789                         kfree(mac);
 790
 791                 } else if (mac->disp_flag == QETH_DISP_ADDR_ADD) {
 792                         rc = qeth_l2_write_mac(card, mac);
 793                         if (rc) {
 794                                 hash_del(&mac->hnode);
 795                                 kfree(mac);
 796                         } else
 797                                 mac->disp_flag = QETH_DISP_ADDR_DELETE;
 798                 } else
 799                         mac->disp_flag = QETH_DISP_ADDR_DELETE;
 800         }
 801
 802         spin_unlock_bh(&card->mclock);
 803
 804         if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
 805                 qeth_setadp_promisc_mode(card);
 806         else
 807                 qeth_promisc_to_bridge(card);
 808 }
 809
 810 static int qeth_l2_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 811 {
 812         int rc;
 813         struct qeth_hdr *hdr = NULL;
 814         int elements = 0;
 815         struct qeth_card *card = dev->ml_priv;
 816         struct sk_buff *new_skb = skb;
 817         int cast_type = qeth_l2_get_cast_type(card, skb);
 818         struct qeth_qdio_out_q *queue;
 819         int tx_bytes = skb->len;
 820         int data_offset = -1;
 821         int elements_needed = 0;
 822         int hd_len = 0;
 823         int nr_frags;
 824
 825         if (card->qdio.do_prio_queueing || (cast_type &&
 826                                         card->info.is_multicast_different))
 827                 queue = card->qdio.out_qs[qeth_get_priority_queue(card, skb,
 828                                         qeth_get_ip_version(skb), cast_type)];
 829         else
 830                 queue = card->qdio.out_qs[card->qdio.default_out_queue];
 831
 832         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
 833                 card->stats.tx_carrier_errors++;
 834                 goto tx_drop;
 835         }
 836
 837         if ((card->info.type == QETH_CARD_TYPE_OSN) &&
 838             (skb->protocol == htons(ETH_P_IPV6)))
 839                 goto tx_drop;
 840
 841         if (card->options.performance_stats) {
 842                 card->perf_stats.outbound_cnt++;
 843                 card->perf_stats.outbound_start_time = qeth_get_micros();
 844         }
 845         netif_stop_queue(dev);
 846
 847         /* fix hardware limitation: as long as we do not have sbal
 848          * chaining we can not send long frag lists
 849          */
 850         if ((card->info.type != QETH_CARD_TYPE_IQD) &&
 851             !qeth_get_elements_no(card, new_skb, 0, 0)) {
 852                 int lin_rc = skb_linearize(new_skb);
 853
 854                 if (card->options.performance_stats) {
 855                         if (lin_rc)
 856                                 card->perf_stats.tx_linfail++;
 857                         else
 858                                 card->perf_stats.tx_lin++;
 859                 }
 860                 if (lin_rc)
 861                         goto tx_drop;
 862         }
 863
 864         if (card->info.type == QETH_CARD_TYPE_OSN)
 865                 hdr = (struct qeth_hdr *)skb->data;
 866         else {
 867                 if (card->info.type == QETH_CARD_TYPE_IQD) {
 868                         new_skb = skb;
 869                         data_offset = ETH_HLEN;
 870                         hd_len = ETH_HLEN;
 871                         hdr = kmem_cache_alloc(qeth_core_header_cache,
 872                                                 GFP_ATOMIC);
 873                         if (!hdr)
 874                                 goto tx_drop;
 875                         elements_needed++;
 876                         skb_reset_mac_header(new_skb);
 877                         qeth_l2_fill_header(card, hdr, new_skb, cast_type);
 878                         hdr->hdr.l2.pkt_length = new_skb->len;
 879                         memcpy(((char *)hdr) + sizeof(struct qeth_hdr),
 880                                 skb_mac_header(new_skb), ETH_HLEN);
 881                 } else {
 882                         /* create a clone with writeable headroom */
 883                         new_skb = skb_realloc_headroom(skb,
 884                                                 sizeof(struct qeth_hdr));
 885                         if (!new_skb)
 886                                 goto tx_drop;
 887                         hdr = (struct qeth_hdr *)skb_push(new_skb,
 888                                                 sizeof(struct qeth_hdr));
 889                         skb_set_mac_header(new_skb, sizeof(struct qeth_hdr));
 890                         qeth_l2_fill_header(card, hdr, new_skb, cast_type);
 891                         if (new_skb->ip_summed == CHECKSUM_PARTIAL)
 892                                 qeth_l2_hdr_csum(card, hdr, new_skb);
 893                 }
 894         }
 895
 896         elements = qeth_get_elements_no(card, new_skb, elements_needed,
 897                                         (data_offset > 0) ? data_offset : 0);
 898         if (!elements) {
 899                 if (data_offset >= 0)
 900                         kmem_cache_free(qeth_core_header_cache, hdr);
 901                 goto tx_drop;
 902         }
 903
 904         if (card->info.type != QETH_CARD_TYPE_IQD) {
 905                 if (qeth_hdr_chk_and_bounce(new_skb, &hdr,
 906                     sizeof(struct qeth_hdr_layer2)))
 907                         goto tx_drop;
 908                 rc = qeth_do_send_packet(card, queue, new_skb, hdr,
 909                                          elements);
 910         } else
 911                 rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
 912                                         elements, data_offset, hd_len);
 913         if (!rc) {
 914                 card->stats.tx_packets++;
 915                 card->stats.tx_bytes += tx_bytes;
 916                 if (card->options.performance_stats) {
 917                         nr_frags = skb_shinfo(new_skb)->nr_frags;
 918                         if (nr_frags) {
 919                                 card->perf_stats.sg_skbs_sent++;
 920                                 /* nr_frags + skb->data */
 921                                 card->perf_stats.sg_frags_sent += nr_frags + 1;
 922                         }
 923                 }
 924                 if (new_skb != skb)
 925                         dev_kfree_skb_any(skb);
 926                 rc = NETDEV_TX_OK;
 927         } else {
 928                 if (data_offset >= 0)
 929                         kmem_cache_free(qeth_core_header_cache, hdr);
 930
 931                 if (rc == -EBUSY) {
 932                         if (new_skb != skb)
 933                                 dev_kfree_skb_any(new_skb);
 934                         return NETDEV_TX_BUSY;
 935                 } else
 936                         goto tx_drop;
 937         }
 938
 939         netif_wake_queue(dev);
 940         if (card->options.performance_stats)
 941                 card->perf_stats.outbound_time += qeth_get_micros() -
 942                         card->perf_stats.outbound_start_time;
 943         return rc;
 944
 945 tx_drop:
 946         card->stats.tx_dropped++;
 947         card->stats.tx_errors++;
 948         if ((new_skb != skb) && new_skb)
 949                 dev_kfree_skb_any(new_skb);
 950         dev_kfree_skb_any(skb);
 951         netif_wake_queue(dev);
 952         return NETDEV_TX_OK;
 953 }
 954
 955 static int __qeth_l2_open(struct net_device *dev)
 956 {
 957         struct qeth_card *card = dev->ml_priv;
 958         int rc = 0;
 959
 960         QETH_CARD_TEXT(card, 4, "qethopen");
 961         if (card->state == CARD_STATE_UP)
 962                 return rc;
 963         if (card->state != CARD_STATE_SOFTSETUP)
 964                 return -ENODEV;
 965
 966         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
 967              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
 968                 QETH_CARD_TEXT(card, 4, "nomacadr");
 969                 return -EPERM;
 970         }
 971         card->data.state = CH_STATE_UP;
 972         card->state = CARD_STATE_UP;
 973         netif_start_queue(dev);
 974
 975         if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) {
 976                 napi_enable(&card->napi);
 977                 napi_schedule(&card->napi);
 978         } else
 979                 rc = -EIO;
 980         return rc;
 981 }
 982
 983 static int qeth_l2_open(struct net_device *dev)
 984 {
 985         struct qeth_card *card = dev->ml_priv;
 986
 987         QETH_CARD_TEXT(card, 5, "qethope_");
 988         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 989                 QETH_CARD_TEXT(card, 3, "openREC");
 990                 return -ERESTARTSYS;
 991         }
 992         return __qeth_l2_open(dev);
 993 }
 994
 995 static int qeth_l2_stop(struct net_device *dev)
 996 {
 997         struct qeth_card *card = dev->ml_priv;
 998
 999         QETH_CARD_TEXT(card, 4, "qethstop");
1000         netif_tx_disable(dev);
1001         if (card->state == CARD_STATE_UP) {
1002                 card->state = CARD_STATE_SOFTSETUP;
1003                 napi_disable(&card->napi);
1004         }
1005         return 0;
1006 }
1007
1008 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
1009 {
1010         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1011
1012         qeth_l2_create_device_attributes(&gdev->dev);
1013         INIT_LIST_HEAD(&card->vid_list);
1014         hash_init(card->mac_htable);
1015         card->options.layer2 = 1;
1016         card->info.hwtrap = 0;
1017         return 0;
1018 }
1019
1020 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
1021 {
1022         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1023
1024         qeth_l2_remove_device_attributes(&cgdev->dev);
1025         qeth_set_allowed_threads(card, 0, 1);
1026         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1027
1028         if (cgdev->state == CCWGROUP_ONLINE)
1029                 qeth_l2_set_offline(cgdev);
1030
1031         if (card->dev) {
1032                 netif_napi_del(&card->napi);
1033                 unregister_netdev(card->dev);
1034                 card->dev = NULL;
1035         }
1036         return;
1037 }
1038
1039 static const struct ethtool_ops qeth_l2_ethtool_ops = {
1040         .get_link = ethtool_op_get_link,
1041         .get_strings = qeth_core_get_strings,
1042         .get_ethtool_stats = qeth_core_get_ethtool_stats,
1043         .get_sset_count = qeth_core_get_sset_count,
1044         .get_drvinfo = qeth_core_get_drvinfo,
1045         .get_settings = qeth_core_ethtool_get_settings,
1046 };
1047
1048 static const struct ethtool_ops qeth_l2_osn_ops = {
1049         .get_strings = qeth_core_get_strings,
1050         .get_ethtool_stats = qeth_core_get_ethtool_stats,
1051         .get_sset_count = qeth_core_get_sset_count,
1052         .get_drvinfo = qeth_core_get_drvinfo,
1053 };
1054
1055 static const struct net_device_ops qeth_l2_netdev_ops = {
1056         .ndo_open               = qeth_l2_open,
1057         .ndo_stop               = qeth_l2_stop,
1058         .ndo_get_stats          = qeth_get_stats,
1059         .ndo_start_xmit         = qeth_l2_hard_start_xmit,
1060         .ndo_validate_addr      = eth_validate_addr,
1061         .ndo_set_rx_mode        = qeth_l2_set_rx_mode,
1062         .ndo_do_ioctl           = qeth_l2_do_ioctl,
1063         .ndo_set_mac_address    = qeth_l2_set_mac_address,
1064         .ndo_change_mtu         = qeth_change_mtu,
1065         .ndo_vlan_rx_add_vid    = qeth_l2_vlan_rx_add_vid,
1066         .ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,
1067         .ndo_tx_timeout         = qeth_tx_timeout,
1068         .ndo_fix_features       = qeth_fix_features,
1069         .ndo_set_features       = qeth_set_features
1070 };
1071
1072 static int qeth_l2_setup_netdev(struct qeth_card *card)
1073 {
1074         switch (card->info.type) {
1075         case QETH_CARD_TYPE_IQD:
1076                 card->dev = alloc_netdev(0, "hsi%d", NET_NAME_UNKNOWN,
1077                                          ether_setup);
1078                 break;
1079         case QETH_CARD_TYPE_OSN:
1080                 card->dev = alloc_netdev(0, "osn%d", NET_NAME_UNKNOWN,
1081                                          ether_setup);
1082                 card->dev->flags |= IFF_NOARP;
1083                 break;
1084         default:
1085                 card->dev = alloc_etherdev(0);
1086         }
1087
1088         if (!card->dev)
1089                 return -ENODEV;
1090
1091         card->dev->ml_priv = card;
1092         card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
1093         card->dev->mtu = card->info.initial_mtu;
1094         card->dev->min_mtu = 64;
1095         card->dev->max_mtu = ETH_MAX_MTU;
1096         card->dev->netdev_ops = &qeth_l2_netdev_ops;
1097         card->dev->ethtool_ops =
1098                 (card->info.type != QETH_CARD_TYPE_OSN) ?
1099                 &qeth_l2_ethtool_ops : &qeth_l2_osn_ops;
1100         card->dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
1101         if (card->info.type == QETH_CARD_TYPE_OSD && !card->info.guestlan) {
1102                 card->dev->hw_features = NETIF_F_SG;
1103                 card->dev->vlan_features = NETIF_F_SG;
1104                 /* OSA 3S and earlier has no RX/TX support */
1105                 if (qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM)) {
1106                         card->dev->hw_features |= NETIF_F_IP_CSUM;
1107                         card->dev->vlan_features |= NETIF_F_IP_CSUM;
1108                 }
1109                 if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM)) {
1110                         card->dev->hw_features |= NETIF_F_RXCSUM;
1111                         card->dev->vlan_features |= NETIF_F_RXCSUM;
1112                 }
1113         }
1114         card->info.broadcast_capable = 1;
1115         qeth_l2_request_initial_mac(card);
1116         card->dev->gso_max_size = (QETH_MAX_BUFFER_ELEMENTS(card) - 1) *
1117                                   PAGE_SIZE;
1118         SET_NETDEV_DEV(card->dev, &card->gdev->dev);
1119         netif_napi_add(card->dev, &card->napi, qeth_l2_poll, QETH_NAPI_WEIGHT);
1120         netif_carrier_off(card->dev);
1121         return register_netdev(card->dev);
1122 }
1123
1124 static int qeth_l2_start_ipassists(struct qeth_card *card)
1125 {
1126         /* configure isolation level */
1127         if (qeth_set_access_ctrl_online(card, 0))
1128                 return -ENODEV;
1129         return 0;
1130 }
1131
1132 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
1133 {
1134         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1135         int rc = 0;
1136         enum qeth_card_states recover_flag;
1137
1138         mutex_lock(&card->discipline_mutex);
1139         mutex_lock(&card->conf_mutex);
1140         QETH_DBF_TEXT(SETUP, 2, "setonlin");
1141         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1142
1143         recover_flag = card->state;
1144         rc = qeth_core_hardsetup_card(card);
1145         if (rc) {
1146                 QETH_DBF_TEXT_(SETUP, 2, "2err%04x", rc);
1147                 rc = -ENODEV;
1148                 goto out_remove;
1149         }
1150         qeth_bridgeport_query_support(card);
1151         if (card->options.sbp.supported_funcs)
1152                 dev_info(&card->gdev->dev,
1153                 "The device represents a Bridge Capable Port\n");
1154         qeth_trace_features(card);
1155
1156         if (!card->dev && qeth_l2_setup_netdev(card)) {
1157                 rc = -ENODEV;
1158                 goto out_remove;
1159         }
1160
1161         if (card->info.type != QETH_CARD_TYPE_OSN)
1162                 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
1163
1164         if (qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP)) {
1165                 if (card->info.hwtrap &&
1166                     qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM))
1167                         card->info.hwtrap = 0;
1168         } else
1169                 card->info.hwtrap = 0;
1170
1171         qeth_l2_setup_bridgeport_attrs(card);
1172
1173         card->state = CARD_STATE_HARDSETUP;
1174         memset(&card->rx, 0, sizeof(struct qeth_rx));
1175         qeth_print_status_message(card);
1176
1177         /* softsetup */
1178         QETH_DBF_TEXT(SETUP, 2, "softsetp");
1179
1180         if ((card->info.type == QETH_CARD_TYPE_OSD) ||
1181             (card->info.type == QETH_CARD_TYPE_OSX)) {
1182                 rc = qeth_l2_start_ipassists(card);
1183                 if (rc)
1184                         goto out_remove;
1185         }
1186
1187         if (card->info.type != QETH_CARD_TYPE_OSN &&
1188             card->info.type != QETH_CARD_TYPE_OSM)
1189                 qeth_l2_process_vlans(card);
1190
1191         netif_tx_disable(card->dev);
1192
1193         rc = qeth_init_qdio_queues(card);
1194         if (rc) {
1195                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1196                 rc = -ENODEV;
1197                 goto out_remove;
1198         }
1199         card->state = CARD_STATE_SOFTSETUP;
1200         if (card->lan_online)
1201                 netif_carrier_on(card->dev);
1202         else
1203                 netif_carrier_off(card->dev);
1204
1205         qeth_set_allowed_threads(card, 0xffffffff, 0);
1206         if (recover_flag == CARD_STATE_RECOVER) {
1207                 if (recovery_mode &&
1208                     card->info.type != QETH_CARD_TYPE_OSN) {
1209                         __qeth_l2_open(card->dev);
1210                 } else {
1211                         rtnl_lock();
1212                         dev_open(card->dev);
1213                         rtnl_unlock();
1214                 }
1215                 /* this also sets saved unicast addresses */
1216                 qeth_l2_set_rx_mode(card->dev);
1217                 rtnl_lock();
1218                 qeth_recover_features(card->dev);
1219                 rtnl_unlock();
1220         }
1221         /* let user_space know that device is online */
1222         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1223         mutex_unlock(&card->conf_mutex);
1224         mutex_unlock(&card->discipline_mutex);
1225         return 0;
1226
1227 out_remove:
1228         qeth_l2_stop_card(card, 0);
1229         ccw_device_set_offline(CARD_DDEV(card));
1230         ccw_device_set_offline(CARD_WDEV(card));
1231         ccw_device_set_offline(CARD_RDEV(card));
1232         qdio_free(CARD_DDEV(card));
1233         if (recover_flag == CARD_STATE_RECOVER)
1234                 card->state = CARD_STATE_RECOVER;
1235         else
1236                 card->state = CARD_STATE_DOWN;
1237         mutex_unlock(&card->conf_mutex);
1238         mutex_unlock(&card->discipline_mutex);
1239         return rc;
1240 }
1241
1242 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1243 {
1244         return __qeth_l2_set_online(gdev, 0);
1245 }
1246
1247 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1248                                         int recovery_mode)
1249 {
1250         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1251         int rc = 0, rc2 = 0, rc3 = 0;
1252         enum qeth_card_states recover_flag;
1253
1254         mutex_lock(&card->discipline_mutex);
1255         mutex_lock(&card->conf_mutex);
1256         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1257         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1258
1259         if (card->dev && netif_carrier_ok(card->dev))
1260                 netif_carrier_off(card->dev);
1261         recover_flag = card->state;
1262         if ((!recovery_mode && card->info.hwtrap) || card->info.hwtrap == 2) {
1263                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1264                 card->info.hwtrap = 1;
1265         }
1266         qeth_l2_stop_card(card, recovery_mode);
1267         rc  = ccw_device_set_offline(CARD_DDEV(card));
1268         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1269         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1270         if (!rc)
1271                 rc = (rc2) ? rc2 : rc3;
1272         if (rc)
1273                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1274         qdio_free(CARD_DDEV(card));
1275         if (recover_flag == CARD_STATE_UP)
1276                 card->state = CARD_STATE_RECOVER;
1277         /* let user_space know that device is offline */
1278         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1279         mutex_unlock(&card->conf_mutex);
1280         mutex_unlock(&card->discipline_mutex);
1281         return 0;
1282 }
1283
1284 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1285 {
1286         return __qeth_l2_set_offline(cgdev, 0);
1287 }
1288
1289 static int qeth_l2_recover(void *ptr)
1290 {
1291         struct qeth_card *card;
1292         int rc = 0;
1293
1294         card = (struct qeth_card *) ptr;
1295         QETH_CARD_TEXT(card, 2, "recover1");
1296         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1297                 return 0;
1298         QETH_CARD_TEXT(card, 2, "recover2");
1299         dev_warn(&card->gdev->dev,
1300                 "A recovery process has been started for the device\n");
1301         qeth_set_recovery_task(card);
1302         __qeth_l2_set_offline(card->gdev, 1);
1303         rc = __qeth_l2_set_online(card->gdev, 1);
1304         if (!rc)
1305                 dev_info(&card->gdev->dev,
1306                         "Device successfully recovered!\n");
1307         else {
1308                 qeth_close_dev(card);
1309                 dev_warn(&card->gdev->dev, "The qeth device driver "
1310                                 "failed to recover an error on the device\n");
1311         }
1312         qeth_clear_recovery_task(card);
1313         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1314         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1315         return 0;
1316 }
1317
1318 static int __init qeth_l2_init(void)
1319 {
1320         pr_info("register layer 2 discipline\n");
1321         return 0;
1322 }
1323
1324 static void __exit qeth_l2_exit(void)
1325 {
1326         pr_info("unregister layer 2 discipline\n");
1327 }
1328
1329 static void qeth_l2_shutdown(struct ccwgroup_device *gdev)
1330 {
1331         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1332         qeth_set_allowed_threads(card, 0, 1);
1333         if ((gdev->state == CCWGROUP_ONLINE) && card->info.hwtrap)
1334                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1335         qeth_qdio_clear_card(card, 0);
1336         qeth_clear_qdio_buffers(card);
1337         qdio_free(CARD_DDEV(card));
1338 }
1339
1340 static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev)
1341 {
1342         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1343
1344         if (card->dev)
1345                 netif_device_detach(card->dev);
1346         qeth_set_allowed_threads(card, 0, 1);
1347         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1348         if (gdev->state == CCWGROUP_OFFLINE)
1349                 return 0;
1350         if (card->state == CARD_STATE_UP) {
1351                 if (card->info.hwtrap)
1352                         qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1353                 __qeth_l2_set_offline(card->gdev, 1);
1354         } else
1355                 __qeth_l2_set_offline(card->gdev, 0);
1356         return 0;
1357 }
1358
1359 static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
1360 {
1361         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1362         int rc = 0;
1363
1364         if (gdev->state == CCWGROUP_OFFLINE)
1365                 goto out;
1366
1367         if (card->state == CARD_STATE_RECOVER) {
1368                 rc = __qeth_l2_set_online(card->gdev, 1);
1369                 if (rc) {
1370                         rtnl_lock();
1371                         dev_close(card->dev);
1372                         rtnl_unlock();
1373                 }
1374         } else
1375                 rc = __qeth_l2_set_online(card->gdev, 0);
1376 out:
1377         qeth_set_allowed_threads(card, 0xffffffff, 0);
1378         if (card->dev)
1379                 netif_device_attach(card->dev);
1380         if (rc)
1381                 dev_warn(&card->gdev->dev, "The qeth device driver "
1382                         "failed to recover an error on the device\n");
1383         return rc;
1384 }
1385
1386 /* Returns zero if the command is successfully "consumed" */
1387 static int qeth_l2_control_event(struct qeth_card *card,
1388                                         struct qeth_ipa_cmd *cmd)
1389 {
1390         switch (cmd->hdr.command) {
1391         case IPA_CMD_SETBRIDGEPORT_OSA:
1392         case IPA_CMD_SETBRIDGEPORT_IQD:
1393                 if (cmd->data.sbp.hdr.command_code ==
1394                                 IPA_SBP_BRIDGE_PORT_STATE_CHANGE) {
1395                         qeth_bridge_state_change(card, cmd);
1396                         return 0;
1397                 } else
1398                         return 1;
1399         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
1400                 qeth_bridge_host_event(card, cmd);
1401                 return 0;
1402         default:
1403                 return 1;
1404         }
1405 }
1406
1407 struct qeth_discipline qeth_l2_discipline = {
1408         .start_poll = qeth_qdio_start_poll,
1409         .input_handler = (qdio_handler_t *) qeth_qdio_input_handler,
1410         .output_handler = (qdio_handler_t *) qeth_qdio_output_handler,
1411         .recover = qeth_l2_recover,
1412         .setup = qeth_l2_probe_device,
1413         .remove = qeth_l2_remove_device,
1414         .set_online = qeth_l2_set_online,
1415         .set_offline = qeth_l2_set_offline,
1416         .shutdown = qeth_l2_shutdown,
1417         .freeze = qeth_l2_pm_suspend,
1418         .thaw = qeth_l2_pm_resume,
1419         .restore = qeth_l2_pm_resume,
1420         .control_event_handler = qeth_l2_control_event,
1421 };
1422 EXPORT_SYMBOL_GPL(qeth_l2_discipline);
1423
1424 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1425                            struct qeth_cmd_buffer *iob)
1426 {
1427         unsigned long flags;
1428         int rc = 0;
1429
1430         QETH_CARD_TEXT(card, 5, "osndctrd");
1431
1432         wait_event(card->wait_q,
1433                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1434         qeth_prepare_control_data(card, len, iob);
1435         QETH_CARD_TEXT(card, 6, "osnoirqp");
1436         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1437         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1438                               (addr_t) iob, 0, 0);
1439         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1440         if (rc) {
1441                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1442                            "ccw_device_start rc = %i\n", rc);
1443                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1444                 qeth_release_buffer(iob->channel, iob);
1445                 atomic_set(&card->write.irq_pending, 0);
1446                 wake_up(&card->wait_q);
1447         }
1448         return rc;
1449 }
1450
1451 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1452                         struct qeth_cmd_buffer *iob, int data_len)
1453 {
1454         u16 s1, s2;
1455
1456         QETH_CARD_TEXT(card, 4, "osndipa");
1457
1458         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1459         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1460         s2 = (u16)data_len;
1461         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1462         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1463         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1464         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1465         return qeth_osn_send_control_data(card, s1, iob);
1466 }
1467
1468 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1469 {
1470         struct qeth_cmd_buffer *iob;
1471         struct qeth_card *card;
1472         int rc;
1473
1474         if (!dev)
1475                 return -ENODEV;
1476         card = dev->ml_priv;
1477         if (!card)
1478                 return -ENODEV;
1479         QETH_CARD_TEXT(card, 2, "osnsdmc");
1480         if (!qeth_card_hw_is_reachable(card))
1481                 return -ENODEV;
1482         iob = qeth_wait_for_buffer(&card->write);
1483         memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1484         rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1485         return rc;
1486 }
1487 EXPORT_SYMBOL(qeth_osn_assist);
1488
1489 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1490                   int (*assist_cb)(struct net_device *, void *),
1491                   int (*data_cb)(struct sk_buff *))
1492 {
1493         struct qeth_card *card;
1494
1495         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1496         if (*dev == NULL)
1497                 return -ENODEV;
1498         card = (*dev)->ml_priv;
1499         if (!card)
1500                 return -ENODEV;
1501         QETH_CARD_TEXT(card, 2, "osnreg");
1502         if ((assist_cb == NULL) || (data_cb == NULL))
1503                 return -EINVAL;
1504         card->osn_info.assist_cb = assist_cb;
1505         card->osn_info.data_cb = data_cb;
1506         return 0;
1507 }
1508 EXPORT_SYMBOL(qeth_osn_register);
1509
1510 void qeth_osn_deregister(struct net_device *dev)
1511 {
1512         struct qeth_card *card;
1513
1514         if (!dev)
1515                 return;
1516         card = dev->ml_priv;
1517         if (!card)
1518                 return;
1519         QETH_CARD_TEXT(card, 2, "osndereg");
1520         card->osn_info.assist_cb = NULL;
1521         card->osn_info.data_cb = NULL;
1522         return;
1523 }
1524 EXPORT_SYMBOL(qeth_osn_deregister);
1525
1526 /* SETBRIDGEPORT support, async notifications */
1527
1528 enum qeth_an_event_type {anev_reg_unreg, anev_abort, anev_reset};
1529
1530 /**
1531  * qeth_bridge_emit_host_event() - bridgeport address change notification
1532  * @card:  qeth_card structure pointer, for udev events.
1533  * @evtype:  "normal" register/unregister, or abort, or reset. For abort
1534  *            and reset token and addr_lnid are unused and may be NULL.
1535  * @code:  event bitmask: high order bit 0x80 value 1 means removal of an
1536  *                        object, 0 - addition of an object.
1537  *                        0x01 - VLAN, 0x02 - MAC, 0x03 - VLAN and MAC.
1538  * @token: "network token" structure identifying physical address of the port.
1539  * @addr_lnid: pointer to structure with MAC address and VLAN ID.
1540  *
1541  * This function is called when registrations and deregistrations are
1542  * reported by the hardware, and also when notifications are enabled -
1543  * for all currently registered addresses.
1544  */
1545 static void qeth_bridge_emit_host_event(struct qeth_card *card,
1546         enum qeth_an_event_type evtype,
1547         u8 code, struct net_if_token *token, struct mac_addr_lnid *addr_lnid)
1548 {
1549         char str[7][32];
1550         char *env[8];
1551         int i = 0;
1552
1553         switch (evtype) {
1554         case anev_reg_unreg:
1555                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=%s",
1556                                 (code & IPA_ADDR_CHANGE_CODE_REMOVAL)
1557                                 ? "deregister" : "register");
1558                 env[i] = str[i]; i++;
1559                 if (code & IPA_ADDR_CHANGE_CODE_VLANID) {
1560                         snprintf(str[i], sizeof(str[i]), "VLAN=%d",
1561                                 addr_lnid->lnid);
1562                         env[i] = str[i]; i++;
1563                 }
1564                 if (code & IPA_ADDR_CHANGE_CODE_MACADDR) {
1565                         snprintf(str[i], sizeof(str[i]), "MAC=%pM",
1566                                 addr_lnid->mac);
1567                         env[i] = str[i]; i++;
1568                 }
1569                 snprintf(str[i], sizeof(str[i]), "NTOK_BUSID=%x.%x.%04x",
1570                         token->cssid, token->ssid, token->devnum);
1571                 env[i] = str[i]; i++;
1572                 snprintf(str[i], sizeof(str[i]), "NTOK_IID=%02x", token->iid);
1573                 env[i] = str[i]; i++;
1574                 snprintf(str[i], sizeof(str[i]), "NTOK_CHPID=%02x",
1575                                 token->chpid);
1576                 env[i] = str[i]; i++;
1577                 snprintf(str[i], sizeof(str[i]), "NTOK_CHID=%04x", token->chid);
1578                 env[i] = str[i]; i++;
1579                 break;
1580         case anev_abort:
1581                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=abort");
1582                 env[i] = str[i]; i++;
1583                 break;
1584         case anev_reset:
1585                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=reset");
1586                 env[i] = str[i]; i++;
1587                 break;
1588         }
1589         env[i] = NULL;
1590         kobject_uevent_env(&card->gdev->dev.kobj, KOBJ_CHANGE, env);
1591 }
1592
1593 struct qeth_bridge_state_data {
1594         struct work_struct worker;
1595         struct qeth_card *card;
1596         struct qeth_sbp_state_change qports;
1597 };
1598
1599 static void qeth_bridge_state_change_worker(struct work_struct *work)
1600 {
1601         struct qeth_bridge_state_data *data =
1602                 container_of(work, struct qeth_bridge_state_data, worker);
1603         /* We are only interested in the first entry - local port */
1604         struct qeth_sbp_port_entry *entry = &data->qports.entry[0];
1605         char env_locrem[32];
1606         char env_role[32];
1607         char env_state[32];
1608         char *env[] = {
1609                 env_locrem,
1610                 env_role,
1611                 env_state,
1612                 NULL
1613         };
1614
1615         /* Role should not change by itself, but if it did, */
1616         /* information from the hardware is authoritative.  */
1617         mutex_lock(&data->card->conf_mutex);
1618         data->card->options.sbp.role = entry->role;
1619         mutex_unlock(&data->card->conf_mutex);
1620
1621         snprintf(env_locrem, sizeof(env_locrem), "BRIDGEPORT=statechange");
1622         snprintf(env_role, sizeof(env_role), "ROLE=%s",
1623                 (entry->role == QETH_SBP_ROLE_NONE) ? "none" :
1624                 (entry->role == QETH_SBP_ROLE_PRIMARY) ? "primary" :
1625                 (entry->role == QETH_SBP_ROLE_SECONDARY) ? "secondary" :
1626                 "<INVALID>");
1627         snprintf(env_state, sizeof(env_state), "STATE=%s",
1628                 (entry->state == QETH_SBP_STATE_INACTIVE) ? "inactive" :
1629                 (entry->state == QETH_SBP_STATE_STANDBY) ? "standby" :
1630                 (entry->state == QETH_SBP_STATE_ACTIVE) ? "active" :
1631                 "<INVALID>");
1632         kobject_uevent_env(&data->card->gdev->dev.kobj,
1633                                 KOBJ_CHANGE, env);
1634         kfree(data);
1635 }
1636
1637 static void qeth_bridge_state_change(struct qeth_card *card,
1638                                         struct qeth_ipa_cmd *cmd)
1639 {
1640         struct qeth_sbp_state_change *qports =
1641                  &cmd->data.sbp.data.state_change;
1642         struct qeth_bridge_state_data *data;
1643         int extrasize;
1644
1645         QETH_CARD_TEXT(card, 2, "brstchng");
1646         if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1647                 QETH_CARD_TEXT_(card, 2, "BPsz%04x", qports->entry_length);
1648                 return;
1649         }
1650         extrasize = sizeof(struct qeth_sbp_port_entry) * qports->num_entries;
1651         data = kzalloc(sizeof(struct qeth_bridge_state_data) + extrasize,
1652                 GFP_ATOMIC);
1653         if (!data) {
1654                 QETH_CARD_TEXT(card, 2, "BPSalloc");
1655                 return;
1656         }
1657         INIT_WORK(&data->worker, qeth_bridge_state_change_worker);
1658         data->card = card;
1659         memcpy(&data->qports, qports,
1660                         sizeof(struct qeth_sbp_state_change) + extrasize);
1661         queue_work(qeth_wq, &data->worker);
1662 }
1663
1664 struct qeth_bridge_host_data {
1665         struct work_struct worker;
1666         struct qeth_card *card;
1667         struct qeth_ipacmd_addr_change hostevs;
1668 };
1669
1670 static void qeth_bridge_host_event_worker(struct work_struct *work)
1671 {
1672         struct qeth_bridge_host_data *data =
1673                 container_of(work, struct qeth_bridge_host_data, worker);
1674         int i;
1675
1676         if (data->hostevs.lost_event_mask) {
1677                 dev_info(&data->card->gdev->dev,
1678 "Address notification from the Bridge Port stopped %s (%s)\n",
1679                         data->card->dev->name,
1680                         (data->hostevs.lost_event_mask == 0x01)
1681                         ? "Overflow"
1682                         : (data->hostevs.lost_event_mask == 0x02)
1683                         ? "Bridge port state change"
1684                         : "Unknown reason");
1685                 mutex_lock(&data->card->conf_mutex);
1686                 data->card->options.sbp.hostnotification = 0;
1687                 mutex_unlock(&data->card->conf_mutex);
1688                 qeth_bridge_emit_host_event(data->card, anev_abort,
1689                         0, NULL, NULL);
1690         } else
1691                 for (i = 0; i < data->hostevs.num_entries; i++) {
1692                         struct qeth_ipacmd_addr_change_entry *entry =
1693                                         &data->hostevs.entry[i];
1694                         qeth_bridge_emit_host_event(data->card,
1695                                         anev_reg_unreg,
1696                                         entry->change_code,
1697                                         &entry->token, &entry->addr_lnid);
1698                 }
1699         kfree(data);
1700 }
1701
1702 static void qeth_bridge_host_event(struct qeth_card *card,
1703                                         struct qeth_ipa_cmd *cmd)
1704 {
1705         struct qeth_ipacmd_addr_change *hostevs =
1706                  &cmd->data.addrchange;
1707         struct qeth_bridge_host_data *data;
1708         int extrasize;
1709
1710         QETH_CARD_TEXT(card, 2, "brhostev");
1711         if (cmd->hdr.return_code != 0x0000) {
1712                 if (cmd->hdr.return_code == 0x0010) {
1713                         if (hostevs->lost_event_mask == 0x00)
1714                                 hostevs->lost_event_mask = 0xff;
1715                 } else {
1716                         QETH_CARD_TEXT_(card, 2, "BPHe%04x",
1717                                 cmd->hdr.return_code);
1718                         return;
1719                 }
1720         }
1721         extrasize = sizeof(struct qeth_ipacmd_addr_change_entry) *
1722                                                 hostevs->num_entries;
1723         data = kzalloc(sizeof(struct qeth_bridge_host_data) + extrasize,
1724                 GFP_ATOMIC);
1725         if (!data) {
1726                 QETH_CARD_TEXT(card, 2, "BPHalloc");
1727                 return;
1728         }
1729         INIT_WORK(&data->worker, qeth_bridge_host_event_worker);
1730         data->card = card;
1731         memcpy(&data->hostevs, hostevs,
1732                         sizeof(struct qeth_ipacmd_addr_change) + extrasize);
1733         queue_work(qeth_wq, &data->worker);
1734 }
1735
1736 /* SETBRIDGEPORT support; sending commands */
1737
1738 struct _qeth_sbp_cbctl {
1739         u16 ipa_rc;
1740         u16 cmd_rc;
1741         union {
1742                 u32 supported;
1743                 struct {
1744                         enum qeth_sbp_roles *role;
1745                         enum qeth_sbp_states *state;
1746                 } qports;
1747         } data;
1748 };
1749
1750 /**
1751  * qeth_bridgeport_makerc() - derive "traditional" error from hardware codes.
1752  * @card:                     qeth_card structure pointer, for debug messages.
1753  * @cbctl:                    state structure with hardware return codes.
1754  * @setcmd:                   IPA command code
1755  *
1756  * Returns negative errno-compatible error indication or 0 on success.
1757  */
1758 static int qeth_bridgeport_makerc(struct qeth_card *card,
1759         struct _qeth_sbp_cbctl *cbctl, enum qeth_ipa_sbp_cmd setcmd)
1760 {
1761         int rc;
1762         int is_iqd = (card->info.type == QETH_CARD_TYPE_IQD);
1763
1764         if ((is_iqd && (cbctl->ipa_rc == IPA_RC_SUCCESS)) ||
1765             (!is_iqd && (cbctl->ipa_rc == cbctl->cmd_rc)))
1766                 switch (cbctl->cmd_rc) {
1767                 case 0x0000:
1768                         rc = 0;
1769                         break;
1770                 case 0x2B04:
1771                 case 0x0004:
1772                         rc = -EOPNOTSUPP;
1773                         break;
1774                 case 0x2B0C:
1775                 case 0x000C: /* Not configured as bridge Port */
1776                         rc = -ENODEV; /* maybe not the best code here? */
1777                         dev_err(&card->gdev->dev,
1778         "The device is not configured as a Bridge Port\n");
1779                         break;
1780                 case 0x2B10:
1781                 case 0x0010: /* OS mismatch */
1782                         rc = -EPERM;
1783                         dev_err(&card->gdev->dev,
1784         "A Bridge Port is already configured by a different operating system\n");
1785                         break;
1786                 case 0x2B14:
1787                 case 0x0014: /* Another device is Primary */
1788                         switch (setcmd) {
1789                         case IPA_SBP_SET_PRIMARY_BRIDGE_PORT:
1790                                 rc = -EEXIST;
1791                                 dev_err(&card->gdev->dev,
1792         "The LAN already has a primary Bridge Port\n");
1793                                 break;
1794                         case IPA_SBP_SET_SECONDARY_BRIDGE_PORT:
1795                                 rc = -EBUSY;
1796                                 dev_err(&card->gdev->dev,
1797         "The device is already a primary Bridge Port\n");
1798                                 break;
1799                         default:
1800                                 rc = -EIO;
1801                         }
1802                         break;
1803                 case 0x2B18:
1804                 case 0x0018: /* This device is currently Secondary */
1805                         rc = -EBUSY;
1806                         dev_err(&card->gdev->dev,
1807         "The device is already a secondary Bridge Port\n");
1808                         break;
1809                 case 0x2B1C:
1810                 case 0x001C: /* Limit for Secondary devices reached */
1811                         rc = -EEXIST;
1812                         dev_err(&card->gdev->dev,
1813         "The LAN cannot have more secondary Bridge Ports\n");
1814                         break;
1815                 case 0x2B24:
1816                 case 0x0024: /* This device is currently Primary */
1817                         rc = -EBUSY;
1818                         dev_err(&card->gdev->dev,
1819         "The device is already a primary Bridge Port\n");
1820                         break;
1821                 case 0x2B20:
1822                 case 0x0020: /* Not authorized by zManager */
1823                         rc = -EACCES;
1824                         dev_err(&card->gdev->dev,
1825         "The device is not authorized to be a Bridge Port\n");
1826                         break;
1827                 default:
1828                         rc = -EIO;
1829                 }
1830         else
1831                 switch (cbctl->ipa_rc) {
1832                 case IPA_RC_NOTSUPP:
1833                         rc = -EOPNOTSUPP;
1834                         break;
1835                 case IPA_RC_UNSUPPORTED_COMMAND:
1836                         rc = -EOPNOTSUPP;
1837                         break;
1838                 default:
1839                         rc = -EIO;
1840                 }
1841
1842         if (rc) {
1843                 QETH_CARD_TEXT_(card, 2, "SBPi%04x", cbctl->ipa_rc);
1844                 QETH_CARD_TEXT_(card, 2, "SBPc%04x", cbctl->cmd_rc);
1845         }
1846         return rc;
1847 }
1848
1849 static inline int ipa_cmd_sbp(struct qeth_card *card)
1850 {
1851         return (card->info.type == QETH_CARD_TYPE_IQD) ?
1852                 IPA_CMD_SETBRIDGEPORT_IQD :
1853                 IPA_CMD_SETBRIDGEPORT_OSA;
1854 }
1855
1856 static int qeth_bridgeport_query_support_cb(struct qeth_card *card,
1857         struct qeth_reply *reply, unsigned long data)
1858 {
1859         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1860         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1861         QETH_CARD_TEXT(card, 2, "brqsupcb");
1862         cbctl->ipa_rc = cmd->hdr.return_code;
1863         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1864         if ((cbctl->ipa_rc == 0) && (cbctl->cmd_rc == 0)) {
1865                 cbctl->data.supported =
1866                         cmd->data.sbp.data.query_cmds_supp.supported_cmds;
1867         } else {
1868                 cbctl->data.supported = 0;
1869         }
1870         return 0;
1871 }
1872
1873 /**
1874  * qeth_bridgeport_query_support() - store bitmask of supported subfunctions.
1875  * @card:                            qeth_card structure pointer.
1876  *
1877  * Sets bitmask of supported setbridgeport subfunctions in the qeth_card
1878  * strucutre: card->options.sbp.supported_funcs.
1879  */
1880 static void qeth_bridgeport_query_support(struct qeth_card *card)
1881 {
1882         struct qeth_cmd_buffer *iob;
1883         struct qeth_ipa_cmd *cmd;
1884         struct _qeth_sbp_cbctl cbctl;
1885
1886         QETH_CARD_TEXT(card, 2, "brqsuppo");
1887         iob = qeth_get_ipacmd_buffer(card, ipa_cmd_sbp(card), 0);
1888         if (!iob)
1889                 return;
1890         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
1891         cmd->data.sbp.hdr.cmdlength =
1892                 sizeof(struct qeth_ipacmd_sbp_hdr) +
1893                 sizeof(struct qeth_sbp_query_cmds_supp);
1894         cmd->data.sbp.hdr.command_code =
1895                 IPA_SBP_QUERY_COMMANDS_SUPPORTED;
1896         cmd->data.sbp.hdr.used_total = 1;
1897         cmd->data.sbp.hdr.seq_no = 1;
1898         if (qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_support_cb,
1899                                                         (void *)&cbctl) ||
1900             qeth_bridgeport_makerc(card, &cbctl,
1901                                         IPA_SBP_QUERY_COMMANDS_SUPPORTED)) {
1902                 /* non-zero makerc signifies failure, and produce messages */
1903                 card->options.sbp.role = QETH_SBP_ROLE_NONE;
1904                 return;
1905         }
1906         card->options.sbp.supported_funcs = cbctl.data.supported;
1907 }
1908
1909 static int qeth_bridgeport_query_ports_cb(struct qeth_card *card,
1910         struct qeth_reply *reply, unsigned long data)
1911 {
1912         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1913         struct qeth_sbp_query_ports *qports = &cmd->data.sbp.data.query_ports;
1914         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1915
1916         QETH_CARD_TEXT(card, 2, "brqprtcb");
1917         cbctl->ipa_rc = cmd->hdr.return_code;
1918         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1919         if ((cbctl->ipa_rc != 0) || (cbctl->cmd_rc != 0))
1920                 return 0;
1921         if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1922                 cbctl->cmd_rc = 0xffff;
1923                 QETH_CARD_TEXT_(card, 2, "SBPs%04x", qports->entry_length);
1924                 return 0;
1925         }
1926         /* first entry contains the state of the local port */
1927         if (qports->num_entries > 0) {
1928                 if (cbctl->data.qports.role)
1929                         *cbctl->data.qports.role = qports->entry[0].role;
1930                 if (cbctl->data.qports.state)
1931                         *cbctl->data.qports.state = qports->entry[0].state;
1932         }
1933         return 0;
1934 }
1935
1936 /**
1937  * qeth_bridgeport_query_ports() - query local bridgeport status.
1938  * @card:                          qeth_card structure pointer.
1939  * @role:   Role of the port: 0-none, 1-primary, 2-secondary.
1940  * @state:  State of the port: 0-inactive, 1-standby, 2-active.
1941  *
1942  * Returns negative errno-compatible error indication or 0 on success.
1943  *
1944  * 'role' and 'state' are not updated in case of hardware operation failure.
1945  */
1946 int qeth_bridgeport_query_ports(struct qeth_card *card,
1947         enum qeth_sbp_roles *role, enum qeth_sbp_states *state)
1948 {
1949         int rc = 0;
1950         struct qeth_cmd_buffer *iob;
1951         struct qeth_ipa_cmd *cmd;
1952         struct _qeth_sbp_cbctl cbctl = {
1953                 .data = {
1954                         .qports = {
1955                                 .role = role,
1956                                 .state = state,
1957                         },
1958                 },
1959         };
1960
1961         QETH_CARD_TEXT(card, 2, "brqports");
1962         if (!(card->options.sbp.supported_funcs & IPA_SBP_QUERY_BRIDGE_PORTS))
1963                 return -EOPNOTSUPP;
1964         iob = qeth_get_ipacmd_buffer(card, ipa_cmd_sbp(card), 0);
1965         if (!iob)
1966                 return -ENOMEM;
1967         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
1968         cmd->data.sbp.hdr.cmdlength =
1969                 sizeof(struct qeth_ipacmd_sbp_hdr);
1970         cmd->data.sbp.hdr.command_code =
1971                 IPA_SBP_QUERY_BRIDGE_PORTS;
1972         cmd->data.sbp.hdr.used_total = 1;
1973         cmd->data.sbp.hdr.seq_no = 1;
1974         rc = qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_ports_cb,
1975                                 (void *)&cbctl);
1976         if (rc < 0)
1977                 return rc;
1978         return qeth_bridgeport_makerc(card, &cbctl, IPA_SBP_QUERY_BRIDGE_PORTS);
1979 }
1980 EXPORT_SYMBOL_GPL(qeth_bridgeport_query_ports);
1981
1982 static int qeth_bridgeport_set_cb(struct qeth_card *card,
1983         struct qeth_reply *reply, unsigned long data)
1984 {
1985         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
1986         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1987         QETH_CARD_TEXT(card, 2, "brsetrcb");
1988         cbctl->ipa_rc = cmd->hdr.return_code;
1989         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1990         return 0;
1991 }
1992
1993 /**
1994  * qeth_bridgeport_setrole() - Assign primary role to the port.
1995  * @card:                      qeth_card structure pointer.
1996  * @role:                      Role to assign.
1997  *
1998  * Returns negative errno-compatible error indication or 0 on success.
1999  */
2000 int qeth_bridgeport_setrole(struct qeth_card *card, enum qeth_sbp_roles role)
2001 {
2002         int rc = 0;
2003         int cmdlength;
2004         struct qeth_cmd_buffer *iob;
2005         struct qeth_ipa_cmd *cmd;
2006         struct _qeth_sbp_cbctl cbctl;
2007         enum qeth_ipa_sbp_cmd setcmd;
2008
2009         QETH_CARD_TEXT(card, 2, "brsetrol");
2010         switch (role) {
2011         case QETH_SBP_ROLE_NONE:
2012                 setcmd = IPA_SBP_RESET_BRIDGE_PORT_ROLE;
2013                 cmdlength =  sizeof(struct qeth_ipacmd_sbp_hdr) +
2014                         sizeof(struct qeth_sbp_reset_role);
2015                 break;
2016         case QETH_SBP_ROLE_PRIMARY:
2017                 setcmd = IPA_SBP_SET_PRIMARY_BRIDGE_PORT;
2018                 cmdlength =  sizeof(struct qeth_ipacmd_sbp_hdr) +
2019                         sizeof(struct qeth_sbp_set_primary);
2020                 break;
2021         case QETH_SBP_ROLE_SECONDARY:
2022                 setcmd = IPA_SBP_SET_SECONDARY_BRIDGE_PORT;
2023                 cmdlength =  sizeof(struct qeth_ipacmd_sbp_hdr) +
2024                         sizeof(struct qeth_sbp_set_secondary);
2025                 break;
2026         default:
2027                 return -EINVAL;
2028         }
2029         if (!(card->options.sbp.supported_funcs & setcmd))
2030                 return -EOPNOTSUPP;
2031         iob = qeth_get_ipacmd_buffer(card, ipa_cmd_sbp(card), 0);
2032         if (!iob)
2033                 return -ENOMEM;
2034         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
2035         cmd->data.sbp.hdr.cmdlength = cmdlength;
2036         cmd->data.sbp.hdr.command_code = setcmd;
2037         cmd->data.sbp.hdr.used_total = 1;
2038         cmd->data.sbp.hdr.seq_no = 1;
2039         rc = qeth_send_ipa_cmd(card, iob, qeth_bridgeport_set_cb,
2040                                 (void *)&cbctl);
2041         if (rc < 0)
2042                 return rc;
2043         return qeth_bridgeport_makerc(card, &cbctl, setcmd);
2044 }
2045
2046 /**
2047  * qeth_anset_makerc() - derive "traditional" error from hardware codes.
2048  * @card:                     qeth_card structure pointer, for debug messages.
2049  *
2050  * Returns negative errno-compatible error indication or 0 on success.
2051  */
2052 static int qeth_anset_makerc(struct qeth_card *card, int pnso_rc, u16 response)
2053 {
2054         int rc;
2055
2056         if (pnso_rc == 0)
2057                 switch (response) {
2058                 case 0x0001:
2059                         rc = 0;
2060                         break;
2061                 case 0x0004:
2062                 case 0x0100:
2063                 case 0x0106:
2064                         rc = -EOPNOTSUPP;
2065                         dev_err(&card->gdev->dev,
2066                                 "Setting address notification failed\n");
2067                         break;
2068                 case 0x0107:
2069                         rc = -EAGAIN;
2070                         break;
2071                 default:
2072                         rc = -EIO;
2073                 }
2074         else
2075                 rc = -EIO;
2076
2077         if (rc) {
2078                 QETH_CARD_TEXT_(card, 2, "SBPp%04x", pnso_rc);
2079                 QETH_CARD_TEXT_(card, 2, "SBPr%04x", response);
2080         }
2081         return rc;
2082 }
2083
2084 static void qeth_bridgeport_an_set_cb(void *priv,
2085                 enum qdio_brinfo_entry_type type, void *entry)
2086 {
2087         struct qeth_card *card = (struct qeth_card *)priv;
2088         struct qdio_brinfo_entry_l2 *l2entry;
2089         u8 code;
2090
2091         if (type != l2_addr_lnid) {
2092                 WARN_ON_ONCE(1);
2093                 return;
2094         }
2095
2096         l2entry = (struct qdio_brinfo_entry_l2 *)entry;
2097         code = IPA_ADDR_CHANGE_CODE_MACADDR;
2098         if (l2entry->addr_lnid.lnid)
2099                 code |= IPA_ADDR_CHANGE_CODE_VLANID;
2100         qeth_bridge_emit_host_event(card, anev_reg_unreg, code,
2101                 (struct net_if_token *)&l2entry->nit,
2102                 (struct mac_addr_lnid *)&l2entry->addr_lnid);
2103 }
2104
2105 /**
2106  * qeth_bridgeport_an_set() - Enable or disable bridgeport address notification
2107  * @card:                     qeth_card structure pointer.
2108  * @enable:                   0 - disable, non-zero - enable notifications
2109  *
2110  * Returns negative errno-compatible error indication or 0 on success.
2111  *
2112  * On enable, emits a series of address notifications udev events for all
2113  * currently registered hosts.
2114  */
2115 int qeth_bridgeport_an_set(struct qeth_card *card, int enable)
2116 {
2117         int rc;
2118         u16 response;
2119         struct ccw_device *ddev;
2120         struct subchannel_id schid;
2121
2122         if (!card)
2123                 return -EINVAL;
2124         if (!card->options.sbp.supported_funcs)
2125                 return -EOPNOTSUPP;
2126         ddev = CARD_DDEV(card);
2127         ccw_device_get_schid(ddev, &schid);
2128
2129         if (enable) {
2130                 qeth_bridge_emit_host_event(card, anev_reset, 0, NULL, NULL);
2131                 rc = qdio_pnso_brinfo(schid, 1, &response,
2132                         qeth_bridgeport_an_set_cb, card);
2133         } else
2134                 rc = qdio_pnso_brinfo(schid, 0, &response, NULL, NULL);
2135         return qeth_anset_makerc(card, rc, response);
2136 }
2137 EXPORT_SYMBOL_GPL(qeth_bridgeport_an_set);
2138
2139 module_init(qeth_l2_init);
2140 module_exit(qeth_l2_exit);
2141 MODULE_AUTHOR("Frank Blaschka <[email protected]>");
2142 MODULE_DESCRIPTION("qeth layer 2 discipline");
2143 MODULE_LICENSE("GPL");