drivers/s390/net/qeth_l2_main.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *    Copyright IBM Corp. 2007, 2009
   4  *    Author(s): Utz Bacher <[email protected]>,
   5  *               Frank Pavlic <[email protected]>,
   6  *               Thomas Spatzier <[email protected]>,
   7  *               Frank Blaschka <[email protected]>
   8  */
   9
  10 #define KMSG_COMPONENT "qeth"
  11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  12
  13 #include <linux/module.h>
  14 #include <linux/moduleparam.h>
  15 #include <linux/string.h>
  16 #include <linux/errno.h>
  17 #include <linux/kernel.h>
  18 #include <linux/slab.h>
  19 #include <linux/etherdevice.h>
  20 #include <linux/ip.h>
  21 #include <linux/list.h>
  22 #include <linux/hash.h>
  23 #include <linux/hashtable.h>
  24 #include <linux/string.h>
  25 #include <asm/setup.h>
  26 #include "qeth_core.h"
  27 #include "qeth_l2.h"
  28
  29 static int qeth_l2_set_offline(struct ccwgroup_device *);
  30 static int qeth_l2_stop(struct net_device *);
  31 static void qeth_l2_set_rx_mode(struct net_device *);
  32 static void qeth_bridgeport_query_support(struct qeth_card *card);
  33 static void qeth_bridge_state_change(struct qeth_card *card,
  34                                         struct qeth_ipa_cmd *cmd);
  35 static void qeth_bridge_host_event(struct qeth_card *card,
  36                                         struct qeth_ipa_cmd *cmd);
  37 static void qeth_l2_vnicc_set_defaults(struct qeth_card *card);
  38 static void qeth_l2_vnicc_init(struct qeth_card *card);
  39 static bool qeth_l2_vnicc_recover_timeout(struct qeth_card *card, u32 vnicc,
  40                                           u32 *timeout);
  41
  42 static struct net_device *qeth_l2_netdev_by_devno(unsigned char *read_dev_no)
  43 {
  44         struct qeth_card *card;
  45         struct net_device *ndev;
  46         __u16 temp_dev_no;
  47         unsigned long flags;
  48         struct ccw_dev_id read_devid;
  49
  50         ndev = NULL;
  51         memcpy(&temp_dev_no, read_dev_no, 2);
  52         read_lock_irqsave(&qeth_core_card_list.rwlock, flags);
  53         list_for_each_entry(card, &qeth_core_card_list.list, list) {
  54                 ccw_device_get_id(CARD_RDEV(card), &read_devid);
  55                 if (read_devid.devno == temp_dev_no) {
  56                         ndev = card->dev;
  57                         break;
  58                 }
  59         }
  60         read_unlock_irqrestore(&qeth_core_card_list.rwlock, flags);
  61         return ndev;
  62 }
  63
  64 static int qeth_setdelmac_makerc(struct qeth_card *card, int retcode)
  65 {
  66         int rc;
  67
  68         if (retcode)
  69                 QETH_CARD_TEXT_(card, 2, "err%04x", retcode);
  70         switch (retcode) {
  71         case IPA_RC_SUCCESS:
  72                 rc = 0;
  73                 break;
  74         case IPA_RC_L2_UNSUPPORTED_CMD:
  75                 rc = -EOPNOTSUPP;
  76                 break;
  77         case IPA_RC_L2_ADDR_TABLE_FULL:
  78                 rc = -ENOSPC;
  79                 break;
  80         case IPA_RC_L2_DUP_MAC:
  81         case IPA_RC_L2_DUP_LAYER3_MAC:
  82                 rc = -EEXIST;
  83                 break;
  84         case IPA_RC_L2_MAC_NOT_AUTH_BY_HYP:
  85         case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
  86                 rc = -EPERM;
  87                 break;
  88         case IPA_RC_L2_MAC_NOT_FOUND:
  89                 rc = -ENOENT;
  90                 break;
  91         case -ENOMEM:
  92                 rc = -ENOMEM;
  93                 break;
  94         default:
  95                 rc = -EIO;
  96                 break;
  97         }
  98         return rc;
  99 }
 100
 101 static int qeth_l2_send_setdelmac(struct qeth_card *card, __u8 *mac,
 102                            enum qeth_ipa_cmds ipacmd)
 103 {
 104         struct qeth_ipa_cmd *cmd;
 105         struct qeth_cmd_buffer *iob;
 106
 107         QETH_CARD_TEXT(card, 2, "L2sdmac");
 108         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 109         if (!iob)
 110                 return -ENOMEM;
 111         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 112         cmd->data.setdelmac.mac_length = ETH_ALEN;
 113         ether_addr_copy(cmd->data.setdelmac.mac, mac);
 114         return qeth_setdelmac_makerc(card, qeth_send_ipa_cmd(card, iob,
 115                                            NULL, NULL));
 116 }
 117
 118 static int qeth_l2_send_setmac(struct qeth_card *card, __u8 *mac)
 119 {
 120         int rc;
 121
 122         QETH_CARD_TEXT(card, 2, "L2Setmac");
 123         rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_SETVMAC);
 124         if (rc == 0) {
 125                 card->info.mac_bits |= QETH_LAYER2_MAC_REGISTERED;
 126                 ether_addr_copy(card->dev->dev_addr, mac);
 127                 dev_info(&card->gdev->dev,
 128                         "MAC address %pM successfully registered on device %s\n",
 129                         card->dev->dev_addr, card->dev->name);
 130         } else {
 131                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 132                 switch (rc) {
 133                 case -EEXIST:
 134                         dev_warn(&card->gdev->dev,
 135                                 "MAC address %pM already exists\n", mac);
 136                         break;
 137                 case -EPERM:
 138                         dev_warn(&card->gdev->dev,
 139                                 "MAC address %pM is not authorized\n", mac);
 140                         break;
 141                 }
 142         }
 143         return rc;
 144 }
 145
 146 static int qeth_l2_send_delmac(struct qeth_card *card, __u8 *mac)
 147 {
 148         int rc;
 149
 150         QETH_CARD_TEXT(card, 2, "L2Delmac");
 151         if (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))
 152                 return 0;
 153         rc = qeth_l2_send_setdelmac(card, mac, IPA_CMD_DELVMAC);
 154         if (rc == 0)
 155                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 156         return rc;
 157 }
 158
 159 static int qeth_l2_write_mac(struct qeth_card *card, u8 *mac)
 160 {
 161         enum qeth_ipa_cmds cmd = is_multicast_ether_addr_64bits(mac) ?
 162                                         IPA_CMD_SETGMAC : IPA_CMD_SETVMAC;
 163         int rc;
 164
 165         QETH_CARD_TEXT(card, 2, "L2Wmac");
 166         rc = qeth_l2_send_setdelmac(card, mac, cmd);
 167         if (rc == -EEXIST)
 168                 QETH_DBF_MESSAGE(2, "MAC %pM already registered on %s\n",
 169                                  mac, QETH_CARD_IFNAME(card));
 170         else if (rc)
 171                 QETH_DBF_MESSAGE(2, "Failed to register MAC %pM on %s: %d\n",
 172                                  mac, QETH_CARD_IFNAME(card), rc);
 173         return rc;
 174 }
 175
 176 static int qeth_l2_remove_mac(struct qeth_card *card, u8 *mac)
 177 {
 178         enum qeth_ipa_cmds cmd = is_multicast_ether_addr_64bits(mac) ?
 179                                         IPA_CMD_DELGMAC : IPA_CMD_DELVMAC;
 180         int rc;
 181
 182         QETH_CARD_TEXT(card, 2, "L2Rmac");
 183         rc = qeth_l2_send_setdelmac(card, mac, cmd);
 184         if (rc)
 185                 QETH_DBF_MESSAGE(2, "Failed to delete MAC %pM on %s: %d\n",
 186                                  mac, QETH_CARD_IFNAME(card), rc);
 187         return rc;
 188 }
 189
 190 static void qeth_l2_del_all_macs(struct qeth_card *card)
 191 {
 192         struct qeth_mac *mac;
 193         struct hlist_node *tmp;
 194         int i;
 195
 196         spin_lock_bh(&card->mclock);
 197         hash_for_each_safe(card->mac_htable, i, tmp, mac, hnode) {
 198                 hash_del(&mac->hnode);
 199                 kfree(mac);
 200         }
 201         spin_unlock_bh(&card->mclock);
 202 }
 203
 204 static int qeth_l2_get_cast_type(struct qeth_card *card, struct sk_buff *skb)
 205 {
 206         if (card->info.type == QETH_CARD_TYPE_OSN)
 207                 return RTN_UNSPEC;
 208         if (is_broadcast_ether_addr(skb->data))
 209                 return RTN_BROADCAST;
 210         if (is_multicast_ether_addr(skb->data))
 211                 return RTN_MULTICAST;
 212         return RTN_UNSPEC;
 213 }
 214
 215 static void qeth_l2_hdr_csum(struct qeth_card *card, struct qeth_hdr *hdr,
 216                              struct sk_buff *skb)
 217 {
 218         struct iphdr *iph = ip_hdr(skb);
 219
 220         /* tcph->check contains already the pseudo hdr checksum
 221          * so just set the header flags
 222          */
 223         if (iph->protocol == IPPROTO_UDP)
 224                 hdr->hdr.l2.flags[1] |= QETH_HDR_EXT_UDP;
 225         hdr->hdr.l2.flags[1] |= QETH_HDR_EXT_CSUM_TRANSP_REQ |
 226                 QETH_HDR_EXT_CSUM_HDR_REQ;
 227         iph->check = 0;
 228         if (card->options.performance_stats)
 229                 card->perf_stats.tx_csum++;
 230 }
 231
 232 static void qeth_l2_fill_header(struct qeth_hdr *hdr, struct sk_buff *skb,
 233                                 int cast_type, unsigned int data_len)
 234 {
 235         struct vlan_ethhdr *veth = (struct vlan_ethhdr *)skb_mac_header(skb);
 236
 237         memset(hdr, 0, sizeof(struct qeth_hdr));
 238         hdr->hdr.l2.id = QETH_HEADER_TYPE_LAYER2;
 239         hdr->hdr.l2.pkt_length = data_len;
 240
 241         /* set byte byte 3 to casting flags */
 242         if (cast_type == RTN_MULTICAST)
 243                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_MULTICAST;
 244         else if (cast_type == RTN_BROADCAST)
 245                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_BROADCAST;
 246         else
 247                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_UNICAST;
 248
 249         /* VSWITCH relies on the VLAN
 250          * information to be present in
 251          * the QDIO header */
 252         if (veth->h_vlan_proto == __constant_htons(ETH_P_8021Q)) {
 253                 hdr->hdr.l2.flags[2] |= QETH_LAYER2_FLAG_VLAN;
 254                 hdr->hdr.l2.vlan_id = ntohs(veth->h_vlan_TCI);
 255         }
 256 }
 257
 258 static int qeth_setdelvlan_makerc(struct qeth_card *card, int retcode)
 259 {
 260         if (retcode)
 261                 QETH_CARD_TEXT_(card, 2, "err%04x", retcode);
 262
 263         switch (retcode) {
 264         case IPA_RC_SUCCESS:
 265                 return 0;
 266         case IPA_RC_L2_INVALID_VLAN_ID:
 267                 return -EINVAL;
 268         case IPA_RC_L2_DUP_VLAN_ID:
 269                 return -EEXIST;
 270         case IPA_RC_L2_VLAN_ID_NOT_FOUND:
 271                 return -ENOENT;
 272         case IPA_RC_L2_VLAN_ID_NOT_ALLOWED:
 273                 return -EPERM;
 274         case -ENOMEM:
 275                 return -ENOMEM;
 276         default:
 277                 return -EIO;
 278         }
 279 }
 280
 281 static int qeth_l2_send_setdelvlan_cb(struct qeth_card *card,
 282                                       struct qeth_reply *reply,
 283                                       unsigned long data)
 284 {
 285         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
 286
 287         QETH_CARD_TEXT(card, 2, "L2sdvcb");
 288         if (cmd->hdr.return_code) {
 289                 QETH_DBF_MESSAGE(2, "Error in processing VLAN %i on %s: 0x%x.\n",
 290                                  cmd->data.setdelvlan.vlan_id,
 291                                  QETH_CARD_IFNAME(card), cmd->hdr.return_code);
 292                 QETH_CARD_TEXT_(card, 2, "L2VL%4x", cmd->hdr.command);
 293                 QETH_CARD_TEXT_(card, 2, "err%d", cmd->hdr.return_code);
 294         }
 295         return 0;
 296 }
 297
 298 static int qeth_l2_send_setdelvlan(struct qeth_card *card, __u16 i,
 299                                    enum qeth_ipa_cmds ipacmd)
 300 {
 301         struct qeth_ipa_cmd *cmd;
 302         struct qeth_cmd_buffer *iob;
 303
 304         QETH_CARD_TEXT_(card, 4, "L2sdv%x", ipacmd);
 305         iob = qeth_get_ipacmd_buffer(card, ipacmd, QETH_PROT_IPV4);
 306         if (!iob)
 307                 return -ENOMEM;
 308         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
 309         cmd->data.setdelvlan.vlan_id = i;
 310         return qeth_setdelvlan_makerc(card, qeth_send_ipa_cmd(card, iob,
 311                                             qeth_l2_send_setdelvlan_cb, NULL));
 312 }
 313
 314 static void qeth_l2_process_vlans(struct qeth_card *card)
 315 {
 316         struct qeth_vlan_vid *id;
 317         QETH_CARD_TEXT(card, 3, "L2prcvln");
 318         spin_lock_bh(&card->vlanlock);
 319         list_for_each_entry(id, &card->vid_list, list) {
 320                 qeth_l2_send_setdelvlan(card, id->vid, IPA_CMD_SETVLAN);
 321         }
 322         spin_unlock_bh(&card->vlanlock);
 323 }
 324
 325 static int qeth_l2_vlan_rx_add_vid(struct net_device *dev,
 326                                    __be16 proto, u16 vid)
 327 {
 328         struct qeth_card *card = dev->ml_priv;
 329         struct qeth_vlan_vid *id;
 330         int rc;
 331
 332         QETH_CARD_TEXT_(card, 4, "aid:%d", vid);
 333         if (!vid)
 334                 return 0;
 335         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 336                 QETH_CARD_TEXT(card, 3, "aidREC");
 337                 return 0;
 338         }
 339         id = kmalloc(sizeof(struct qeth_vlan_vid), GFP_ATOMIC);
 340         if (id) {
 341                 id->vid = vid;
 342                 rc = qeth_l2_send_setdelvlan(card, vid, IPA_CMD_SETVLAN);
 343                 if (rc) {
 344                         kfree(id);
 345                         return rc;
 346                 }
 347                 spin_lock_bh(&card->vlanlock);
 348                 list_add_tail(&id->list, &card->vid_list);
 349                 spin_unlock_bh(&card->vlanlock);
 350         } else {
 351                 return -ENOMEM;
 352         }
 353         return 0;
 354 }
 355
 356 static int qeth_l2_vlan_rx_kill_vid(struct net_device *dev,
 357                                     __be16 proto, u16 vid)
 358 {
 359         struct qeth_vlan_vid *id, *tmpid = NULL;
 360         struct qeth_card *card = dev->ml_priv;
 361         int rc = 0;
 362
 363         QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
 364         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 365                 QETH_CARD_TEXT(card, 3, "kidREC");
 366                 return 0;
 367         }
 368         spin_lock_bh(&card->vlanlock);
 369         list_for_each_entry(id, &card->vid_list, list) {
 370                 if (id->vid == vid) {
 371                         list_del(&id->list);
 372                         tmpid = id;
 373                         break;
 374                 }
 375         }
 376         spin_unlock_bh(&card->vlanlock);
 377         if (tmpid) {
 378                 rc = qeth_l2_send_setdelvlan(card, vid, IPA_CMD_DELVLAN);
 379                 kfree(tmpid);
 380         }
 381         qeth_l2_set_rx_mode(card->dev);
 382         return rc;
 383 }
 384
 385 static void qeth_l2_stop_card(struct qeth_card *card, int recovery_mode)
 386 {
 387         QETH_DBF_TEXT(SETUP , 2, "stopcard");
 388         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
 389
 390         qeth_set_allowed_threads(card, 0, 1);
 391         if (card->read.state == CH_STATE_UP &&
 392             card->write.state == CH_STATE_UP &&
 393             (card->state == CARD_STATE_UP)) {
 394                 if (recovery_mode &&
 395                     card->info.type != QETH_CARD_TYPE_OSN) {
 396                         qeth_l2_stop(card->dev);
 397                 } else {
 398                         rtnl_lock();
 399                         dev_close(card->dev);
 400                         rtnl_unlock();
 401                 }
 402                 card->info.mac_bits &= ~QETH_LAYER2_MAC_REGISTERED;
 403                 card->state = CARD_STATE_SOFTSETUP;
 404         }
 405         if (card->state == CARD_STATE_SOFTSETUP) {
 406                 qeth_l2_del_all_macs(card);
 407                 qeth_clear_ipacmd_list(card);
 408                 card->state = CARD_STATE_HARDSETUP;
 409         }
 410         if (card->state == CARD_STATE_HARDSETUP) {
 411                 qeth_qdio_clear_card(card, 0);
 412                 qeth_clear_qdio_buffers(card);
 413                 qeth_clear_working_pool_list(card);
 414                 card->state = CARD_STATE_DOWN;
 415         }
 416         if (card->state == CARD_STATE_DOWN) {
 417                 qeth_clear_cmd_buffers(&card->read);
 418                 qeth_clear_cmd_buffers(&card->write);
 419         }
 420 }
 421
 422 static int qeth_l2_process_inbound_buffer(struct qeth_card *card,
 423                                 int budget, int *done)
 424 {
 425         int work_done = 0;
 426         struct sk_buff *skb;
 427         struct qeth_hdr *hdr;
 428         unsigned int len;
 429
 430         *done = 0;
 431         WARN_ON_ONCE(!budget);
 432         while (budget) {
 433                 skb = qeth_core_get_next_skb(card,
 434                         &card->qdio.in_q->bufs[card->rx.b_index],
 435                         &card->rx.b_element, &card->rx.e_offset, &hdr);
 436                 if (!skb) {
 437                         *done = 1;
 438                         break;
 439                 }
 440                 skb->dev = card->dev;
 441                 switch (hdr->hdr.l2.id) {
 442                 case QETH_HEADER_TYPE_LAYER2:
 443                         skb->pkt_type = PACKET_HOST;
 444                         skb->protocol = eth_type_trans(skb, skb->dev);
 445                         if ((card->dev->features & NETIF_F_RXCSUM)
 446                            && ((hdr->hdr.l2.flags[1] &
 447                                 (QETH_HDR_EXT_CSUM_HDR_REQ |
 448                                    QETH_HDR_EXT_CSUM_TRANSP_REQ)) ==
 449                                 (QETH_HDR_EXT_CSUM_HDR_REQ |
 450                                    QETH_HDR_EXT_CSUM_TRANSP_REQ)))
 451                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 452                         else
 453                                 skb->ip_summed = CHECKSUM_NONE;
 454                         if (skb->protocol == htons(ETH_P_802_2))
 455                                 *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
 456                         len = skb->len;
 457                         napi_gro_receive(&card->napi, skb);
 458                         break;
 459                 case QETH_HEADER_TYPE_OSN:
 460                         if (card->info.type == QETH_CARD_TYPE_OSN) {
 461                                 skb_push(skb, sizeof(struct qeth_hdr));
 462                                 skb_copy_to_linear_data(skb, hdr,
 463                                                 sizeof(struct qeth_hdr));
 464                                 len = skb->len;
 465                                 card->osn_info.data_cb(skb);
 466                                 break;
 467                         }
 468                         /* else unknown */
 469                 default:
 470                         dev_kfree_skb_any(skb);
 471                         QETH_CARD_TEXT(card, 3, "inbunkno");
 472                         QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
 473                         continue;
 474                 }
 475                 work_done++;
 476                 budget--;
 477                 card->stats.rx_packets++;
 478                 card->stats.rx_bytes += len;
 479         }
 480         return work_done;
 481 }
 482
 483 static int qeth_l2_request_initial_mac(struct qeth_card *card)
 484 {
 485         int rc = 0;
 486         char vendor_pre[] = {0x02, 0x00, 0x00};
 487
 488         QETH_DBF_TEXT(SETUP, 2, "l2reqmac");
 489         QETH_DBF_TEXT_(SETUP, 2, "doL2%s", CARD_BUS_ID(card));
 490
 491         if (MACHINE_IS_VM) {
 492                 rc = qeth_vm_request_mac(card);
 493                 if (!rc)
 494                         goto out;
 495                 QETH_DBF_MESSAGE(2, "z/VM MAC Service failed on device %s: x%x\n",
 496                                  CARD_BUS_ID(card), rc);
 497                 QETH_DBF_TEXT_(SETUP, 2, "err%04x", rc);
 498                 /* fall back to alternative mechanism: */
 499         }
 500
 501         if (card->info.type == QETH_CARD_TYPE_IQD ||
 502             card->info.type == QETH_CARD_TYPE_OSM ||
 503             card->info.type == QETH_CARD_TYPE_OSX ||
 504             card->info.guestlan) {
 505                 rc = qeth_setadpparms_change_macaddr(card);
 506                 if (rc) {
 507                         QETH_DBF_MESSAGE(2, "couldn't get MAC address on "
 508                                 "device %s: x%x\n", CARD_BUS_ID(card), rc);
 509                         QETH_DBF_TEXT_(SETUP, 2, "1err%04x", rc);
 510                         return rc;
 511                 }
 512         } else {
 513                 eth_random_addr(card->dev->dev_addr);
 514                 memcpy(card->dev->dev_addr, vendor_pre, 3);
 515         }
 516 out:
 517         QETH_DBF_HEX(SETUP, 2, card->dev->dev_addr, card->dev->addr_len);
 518         return 0;
 519 }
 520
 521 static int qeth_l2_set_mac_address(struct net_device *dev, void *p)
 522 {
 523         struct sockaddr *addr = p;
 524         struct qeth_card *card = dev->ml_priv;
 525         int rc = 0;
 526
 527         QETH_CARD_TEXT(card, 3, "setmac");
 528
 529         if (card->info.type == QETH_CARD_TYPE_OSN ||
 530             card->info.type == QETH_CARD_TYPE_OSM ||
 531             card->info.type == QETH_CARD_TYPE_OSX) {
 532                 QETH_CARD_TEXT(card, 3, "setmcTYP");
 533                 return -EOPNOTSUPP;
 534         }
 535         QETH_CARD_HEX(card, 3, addr->sa_data, ETH_ALEN);
 536         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 537                 QETH_CARD_TEXT(card, 3, "setmcREC");
 538                 return -ERESTARTSYS;
 539         }
 540         rc = qeth_l2_send_delmac(card, &card->dev->dev_addr[0]);
 541         if (!rc || (rc == -ENOENT))
 542                 rc = qeth_l2_send_setmac(card, addr->sa_data);
 543         return rc ? -EINVAL : 0;
 544 }
 545
 546 static void qeth_promisc_to_bridge(struct qeth_card *card)
 547 {
 548         struct net_device *dev = card->dev;
 549         enum qeth_ipa_promisc_modes promisc_mode;
 550         int role;
 551         int rc;
 552
 553         QETH_CARD_TEXT(card, 3, "pmisc2br");
 554
 555         if (!card->options.sbp.reflect_promisc)
 556                 return;
 557         promisc_mode = (dev->flags & IFF_PROMISC) ? SET_PROMISC_MODE_ON
 558                                                 : SET_PROMISC_MODE_OFF;
 559         if (promisc_mode == card->info.promisc_mode)
 560                 return;
 561
 562         if (promisc_mode == SET_PROMISC_MODE_ON) {
 563                 if (card->options.sbp.reflect_promisc_primary)
 564                         role = QETH_SBP_ROLE_PRIMARY;
 565                 else
 566                         role = QETH_SBP_ROLE_SECONDARY;
 567         } else
 568                 role = QETH_SBP_ROLE_NONE;
 569
 570         rc = qeth_bridgeport_setrole(card, role);
 571         QETH_DBF_TEXT_(SETUP, 2, "bpm%c%04x",
 572                         (promisc_mode == SET_PROMISC_MODE_ON) ? '+' : '-', rc);
 573         if (!rc) {
 574                 card->options.sbp.role = role;
 575                 card->info.promisc_mode = promisc_mode;
 576         }
 577
 578 }
 579 /* New MAC address is added to the hash table and marked to be written on card
 580  * only if there is not in the hash table storage already
 581  *
 582 */
 583 static void qeth_l2_add_mac(struct qeth_card *card, struct netdev_hw_addr *ha)
 584 {
 585         u32 mac_hash = get_unaligned((u32 *)(&ha->addr[2]));
 586         struct qeth_mac *mac;
 587
 588         hash_for_each_possible(card->mac_htable, mac, hnode, mac_hash) {
 589                 if (ether_addr_equal_64bits(ha->addr, mac->mac_addr)) {
 590                         mac->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
 591                         return;
 592                 }
 593         }
 594
 595         mac = kzalloc(sizeof(struct qeth_mac), GFP_ATOMIC);
 596         if (!mac)
 597                 return;
 598
 599         ether_addr_copy(mac->mac_addr, ha->addr);
 600         mac->disp_flag = QETH_DISP_ADDR_ADD;
 601
 602         hash_add(card->mac_htable, &mac->hnode, mac_hash);
 603 }
 604
 605 static void qeth_l2_set_rx_mode(struct net_device *dev)
 606 {
 607         struct qeth_card *card = dev->ml_priv;
 608         struct netdev_hw_addr *ha;
 609         struct qeth_mac *mac;
 610         struct hlist_node *tmp;
 611         int i;
 612         int rc;
 613
 614         if (card->info.type == QETH_CARD_TYPE_OSN)
 615                 return;
 616
 617         QETH_CARD_TEXT(card, 3, "setmulti");
 618         if (qeth_threads_running(card, QETH_RECOVER_THREAD) &&
 619             (card->state != CARD_STATE_UP))
 620                 return;
 621
 622         spin_lock_bh(&card->mclock);
 623
 624         netdev_for_each_mc_addr(ha, dev)
 625                 qeth_l2_add_mac(card, ha);
 626         netdev_for_each_uc_addr(ha, dev)
 627                 qeth_l2_add_mac(card, ha);
 628
 629         hash_for_each_safe(card->mac_htable, i, tmp, mac, hnode) {
 630                 switch (mac->disp_flag) {
 631                 case QETH_DISP_ADDR_DELETE:
 632                         qeth_l2_remove_mac(card, mac->mac_addr);
 633                         hash_del(&mac->hnode);
 634                         kfree(mac);
 635                         break;
 636                 case QETH_DISP_ADDR_ADD:
 637                         rc = qeth_l2_write_mac(card, mac->mac_addr);
 638                         if (rc) {
 639                                 hash_del(&mac->hnode);
 640                                 kfree(mac);
 641                                 break;
 642                         }
 643                         /* fall through */
 644                 default:
 645                         /* for next call to set_rx_mode(): */
 646                         mac->disp_flag = QETH_DISP_ADDR_DELETE;
 647                 }
 648         }
 649
 650         spin_unlock_bh(&card->mclock);
 651
 652         if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
 653                 qeth_setadp_promisc_mode(card);
 654         else
 655                 qeth_promisc_to_bridge(card);
 656 }
 657
 658 static int qeth_l2_xmit_iqd(struct qeth_card *card, struct sk_buff *skb,
 659                             struct qeth_qdio_out_q *queue, int cast_type)
 660 {
 661         unsigned int data_offset = ETH_HLEN;
 662         struct qeth_hdr *hdr;
 663         int rc;
 664
 665         hdr = kmem_cache_alloc(qeth_core_header_cache, GFP_ATOMIC);
 666         if (!hdr)
 667                 return -ENOMEM;
 668         qeth_l2_fill_header(hdr, skb, cast_type, skb->len);
 669         skb_copy_from_linear_data(skb, ((char *)hdr) + sizeof(*hdr),
 670                                   data_offset);
 671
 672         if (!qeth_get_elements_no(card, skb, 1, data_offset)) {
 673                 rc = -E2BIG;
 674                 goto out;
 675         }
 676         rc = qeth_do_send_packet_fast(queue, skb, hdr, data_offset,
 677                                       sizeof(*hdr) + data_offset);
 678 out:
 679         if (rc)
 680                 kmem_cache_free(qeth_core_header_cache, hdr);
 681         return rc;
 682 }
 683
 684 static int qeth_l2_xmit_osa(struct qeth_card *card, struct sk_buff *skb,
 685                             struct qeth_qdio_out_q *queue, int cast_type)
 686 {
 687         int push_len = sizeof(struct qeth_hdr);
 688         unsigned int elements, nr_frags;
 689         unsigned int hdr_elements = 0;
 690         struct qeth_hdr *hdr = NULL;
 691         unsigned int hd_len = 0;
 692         int rc;
 693
 694         /* fix hardware limitation: as long as we do not have sbal
 695          * chaining we can not send long frag lists
 696          */
 697         if (!qeth_get_elements_no(card, skb, 0, 0)) {
 698                 rc = skb_linearize(skb);
 699
 700                 if (card->options.performance_stats) {
 701                         if (rc)
 702                                 card->perf_stats.tx_linfail++;
 703                         else
 704                                 card->perf_stats.tx_lin++;
 705                 }
 706                 if (rc)
 707                         return rc;
 708         }
 709         nr_frags = skb_shinfo(skb)->nr_frags;
 710
 711         rc = skb_cow_head(skb, push_len);
 712         if (rc)
 713                 return rc;
 714         push_len = qeth_push_hdr(skb, &hdr, push_len);
 715         if (push_len < 0)
 716                 return push_len;
 717         if (!push_len) {
 718                 /* hdr was allocated from cache */
 719                 hd_len = sizeof(*hdr);
 720                 hdr_elements = 1;
 721         }
 722         qeth_l2_fill_header(hdr, skb, cast_type, skb->len - push_len);
 723         if (skb->ip_summed == CHECKSUM_PARTIAL)
 724                 qeth_l2_hdr_csum(card, hdr, skb);
 725
 726         elements = qeth_get_elements_no(card, skb, hdr_elements, 0);
 727         if (!elements) {
 728                 rc = -E2BIG;
 729                 goto out;
 730         }
 731         elements += hdr_elements;
 732
 733         /* TODO: remove the skb_orphan() once TX completion is fast enough */
 734         skb_orphan(skb);
 735         rc = qeth_do_send_packet(card, queue, skb, hdr, 0, hd_len, elements);
 736 out:
 737         if (!rc) {
 738                 if (card->options.performance_stats && nr_frags) {
 739                         card->perf_stats.sg_skbs_sent++;
 740                         /* nr_frags + skb->data */
 741                         card->perf_stats.sg_frags_sent += nr_frags + 1;
 742                 }
 743         } else {
 744                 if (hd_len)
 745                         kmem_cache_free(qeth_core_header_cache, hdr);
 746                 if (rc == -EBUSY)
 747                         /* roll back to ETH header */
 748                         skb_pull(skb, push_len);
 749         }
 750         return rc;
 751 }
 752
 753 static int qeth_l2_xmit_osn(struct qeth_card *card, struct sk_buff *skb,
 754                             struct qeth_qdio_out_q *queue)
 755 {
 756         unsigned int elements;
 757         struct qeth_hdr *hdr;
 758
 759         if (skb->protocol == htons(ETH_P_IPV6))
 760                 return -EPROTONOSUPPORT;
 761
 762         hdr = (struct qeth_hdr *)skb->data;
 763         elements = qeth_get_elements_no(card, skb, 0, 0);
 764         if (!elements)
 765                 return -E2BIG;
 766         if (qeth_hdr_chk_and_bounce(skb, &hdr, sizeof(*hdr)))
 767                 return -EINVAL;
 768         return qeth_do_send_packet(card, queue, skb, hdr, 0, 0, elements);
 769 }
 770
 771 static netdev_tx_t qeth_l2_hard_start_xmit(struct sk_buff *skb,
 772                                            struct net_device *dev)
 773 {
 774         struct qeth_card *card = dev->ml_priv;
 775         int cast_type = qeth_l2_get_cast_type(card, skb);
 776         struct qeth_qdio_out_q *queue;
 777         int tx_bytes = skb->len;
 778         int rc;
 779
 780         if (card->qdio.do_prio_queueing || (cast_type &&
 781                                         card->info.is_multicast_different))
 782                 queue = card->qdio.out_qs[qeth_get_priority_queue(card, skb,
 783                                         qeth_get_ip_version(skb), cast_type)];
 784         else
 785                 queue = card->qdio.out_qs[card->qdio.default_out_queue];
 786
 787         if ((card->state != CARD_STATE_UP) || !card->lan_online) {
 788                 card->stats.tx_carrier_errors++;
 789                 goto tx_drop;
 790         }
 791
 792         if (card->options.performance_stats) {
 793                 card->perf_stats.outbound_cnt++;
 794                 card->perf_stats.outbound_start_time = qeth_get_micros();
 795         }
 796         netif_stop_queue(dev);
 797
 798         switch (card->info.type) {
 799         case QETH_CARD_TYPE_OSN:
 800                 rc = qeth_l2_xmit_osn(card, skb, queue);
 801                 break;
 802         case QETH_CARD_TYPE_IQD:
 803                 rc = qeth_l2_xmit_iqd(card, skb, queue, cast_type);
 804                 break;
 805         default:
 806                 rc = qeth_l2_xmit_osa(card, skb, queue, cast_type);
 807         }
 808
 809         if (!rc) {
 810                 card->stats.tx_packets++;
 811                 card->stats.tx_bytes += tx_bytes;
 812                 if (card->options.performance_stats)
 813                         card->perf_stats.outbound_time += qeth_get_micros() -
 814                                 card->perf_stats.outbound_start_time;
 815                 netif_wake_queue(dev);
 816                 return NETDEV_TX_OK;
 817         } else if (rc == -EBUSY) {
 818                 return NETDEV_TX_BUSY;
 819         } /* else fall through */
 820
 821 tx_drop:
 822         card->stats.tx_dropped++;
 823         card->stats.tx_errors++;
 824         dev_kfree_skb_any(skb);
 825         netif_wake_queue(dev);
 826         return NETDEV_TX_OK;
 827 }
 828
 829 static int __qeth_l2_open(struct net_device *dev)
 830 {
 831         struct qeth_card *card = dev->ml_priv;
 832         int rc = 0;
 833
 834         QETH_CARD_TEXT(card, 4, "qethopen");
 835         if (card->state == CARD_STATE_UP)
 836                 return rc;
 837         if (card->state != CARD_STATE_SOFTSETUP)
 838                 return -ENODEV;
 839
 840         if ((card->info.type != QETH_CARD_TYPE_OSN) &&
 841              (!(card->info.mac_bits & QETH_LAYER2_MAC_REGISTERED))) {
 842                 QETH_CARD_TEXT(card, 4, "nomacadr");
 843                 return -EPERM;
 844         }
 845         card->data.state = CH_STATE_UP;
 846         card->state = CARD_STATE_UP;
 847         netif_start_queue(dev);
 848
 849         if (qdio_stop_irq(card->data.ccwdev, 0) >= 0) {
 850                 napi_enable(&card->napi);
 851                 napi_schedule(&card->napi);
 852         } else
 853                 rc = -EIO;
 854         return rc;
 855 }
 856
 857 static int qeth_l2_open(struct net_device *dev)
 858 {
 859         struct qeth_card *card = dev->ml_priv;
 860
 861         QETH_CARD_TEXT(card, 5, "qethope_");
 862         if (qeth_wait_for_threads(card, QETH_RECOVER_THREAD)) {
 863                 QETH_CARD_TEXT(card, 3, "openREC");
 864                 return -ERESTARTSYS;
 865         }
 866         return __qeth_l2_open(dev);
 867 }
 868
 869 static int qeth_l2_stop(struct net_device *dev)
 870 {
 871         struct qeth_card *card = dev->ml_priv;
 872
 873         QETH_CARD_TEXT(card, 4, "qethstop");
 874         netif_tx_disable(dev);
 875         if (card->state == CARD_STATE_UP) {
 876                 card->state = CARD_STATE_SOFTSETUP;
 877                 napi_disable(&card->napi);
 878         }
 879         return 0;
 880 }
 881
 882 static const struct device_type qeth_l2_devtype = {
 883         .name = "qeth_layer2",
 884         .groups = qeth_l2_attr_groups,
 885 };
 886
 887 static int qeth_l2_probe_device(struct ccwgroup_device *gdev)
 888 {
 889         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
 890         int rc;
 891
 892         if (gdev->dev.type == &qeth_generic_devtype) {
 893                 rc = qeth_l2_create_device_attributes(&gdev->dev);
 894                 if (rc)
 895                         return rc;
 896         }
 897         INIT_LIST_HEAD(&card->vid_list);
 898         hash_init(card->mac_htable);
 899         card->options.layer2 = 1;
 900         card->info.hwtrap = 0;
 901         qeth_l2_vnicc_set_defaults(card);
 902         return 0;
 903 }
 904
 905 static void qeth_l2_remove_device(struct ccwgroup_device *cgdev)
 906 {
 907         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
 908
 909         if (cgdev->dev.type == &qeth_generic_devtype)
 910                 qeth_l2_remove_device_attributes(&cgdev->dev);
 911         qeth_set_allowed_threads(card, 0, 1);
 912         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
 913
 914         if (cgdev->state == CCWGROUP_ONLINE)
 915                 qeth_l2_set_offline(cgdev);
 916
 917         if (card->dev) {
 918                 netif_napi_del(&card->napi);
 919                 unregister_netdev(card->dev);
 920                 card->dev = NULL;
 921         }
 922         return;
 923 }
 924
 925 static const struct ethtool_ops qeth_l2_ethtool_ops = {
 926         .get_link = ethtool_op_get_link,
 927         .get_strings = qeth_core_get_strings,
 928         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 929         .get_sset_count = qeth_core_get_sset_count,
 930         .get_drvinfo = qeth_core_get_drvinfo,
 931         .get_link_ksettings = qeth_core_ethtool_get_link_ksettings,
 932 };
 933
 934 static const struct ethtool_ops qeth_l2_osn_ops = {
 935         .get_strings = qeth_core_get_strings,
 936         .get_ethtool_stats = qeth_core_get_ethtool_stats,
 937         .get_sset_count = qeth_core_get_sset_count,
 938         .get_drvinfo = qeth_core_get_drvinfo,
 939 };
 940
 941 static const struct net_device_ops qeth_l2_netdev_ops = {
 942         .ndo_open               = qeth_l2_open,
 943         .ndo_stop               = qeth_l2_stop,
 944         .ndo_get_stats          = qeth_get_stats,
 945         .ndo_start_xmit         = qeth_l2_hard_start_xmit,
 946         .ndo_features_check     = qeth_features_check,
 947         .ndo_validate_addr      = eth_validate_addr,
 948         .ndo_set_rx_mode        = qeth_l2_set_rx_mode,
 949         .ndo_do_ioctl           = qeth_do_ioctl,
 950         .ndo_set_mac_address    = qeth_l2_set_mac_address,
 951         .ndo_change_mtu         = qeth_change_mtu,
 952         .ndo_vlan_rx_add_vid    = qeth_l2_vlan_rx_add_vid,
 953         .ndo_vlan_rx_kill_vid   = qeth_l2_vlan_rx_kill_vid,
 954         .ndo_tx_timeout         = qeth_tx_timeout,
 955         .ndo_fix_features       = qeth_fix_features,
 956         .ndo_set_features       = qeth_set_features
 957 };
 958
 959 static int qeth_l2_setup_netdev(struct qeth_card *card)
 960 {
 961         switch (card->info.type) {
 962         case QETH_CARD_TYPE_IQD:
 963                 card->dev = alloc_netdev(0, "hsi%d", NET_NAME_UNKNOWN,
 964                                          ether_setup);
 965                 break;
 966         case QETH_CARD_TYPE_OSN:
 967                 card->dev = alloc_netdev(0, "osn%d", NET_NAME_UNKNOWN,
 968                                          ether_setup);
 969                 break;
 970         default:
 971                 card->dev = alloc_etherdev(0);
 972         }
 973
 974         if (!card->dev)
 975                 return -ENODEV;
 976
 977         card->dev->ml_priv = card;
 978         card->dev->watchdog_timeo = QETH_TX_TIMEOUT;
 979         card->dev->mtu = card->info.initial_mtu;
 980         card->dev->min_mtu = 64;
 981         card->dev->max_mtu = ETH_MAX_MTU;
 982         card->dev->netdev_ops = &qeth_l2_netdev_ops;
 983         if (card->info.type == QETH_CARD_TYPE_OSN) {
 984                 card->dev->ethtool_ops = &qeth_l2_osn_ops;
 985                 card->dev->flags |= IFF_NOARP;
 986         } else {
 987                 card->dev->ethtool_ops = &qeth_l2_ethtool_ops;
 988         }
 989
 990         if (card->info.type == QETH_CARD_TYPE_OSM)
 991                 card->dev->features |= NETIF_F_VLAN_CHALLENGED;
 992         else
 993                 card->dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
 994         if (card->info.type == QETH_CARD_TYPE_OSD && !card->info.guestlan) {
 995                 card->dev->hw_features = NETIF_F_SG;
 996                 card->dev->vlan_features = NETIF_F_SG;
 997                 card->dev->features |= NETIF_F_SG;
 998                 /* OSA 3S and earlier has no RX/TX support */
 999                 if (qeth_is_supported(card, IPA_OUTBOUND_CHECKSUM)) {
1000                         card->dev->hw_features |= NETIF_F_IP_CSUM;
1001                         card->dev->vlan_features |= NETIF_F_IP_CSUM;
1002                 }
1003                 if (qeth_is_supported(card, IPA_INBOUND_CHECKSUM)) {
1004                         card->dev->hw_features |= NETIF_F_RXCSUM;
1005                         card->dev->vlan_features |= NETIF_F_RXCSUM;
1006                 }
1007         }
1008         if (card->info.type != QETH_CARD_TYPE_OSN &&
1009             card->info.type != QETH_CARD_TYPE_IQD) {
1010                 card->dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1011                 card->dev->needed_headroom = sizeof(struct qeth_hdr);
1012         }
1013
1014         card->info.broadcast_capable = 1;
1015         qeth_l2_request_initial_mac(card);
1016         SET_NETDEV_DEV(card->dev, &card->gdev->dev);
1017         netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT);
1018         netif_carrier_off(card->dev);
1019         return register_netdev(card->dev);
1020 }
1021
1022 static int qeth_l2_start_ipassists(struct qeth_card *card)
1023 {
1024         /* configure isolation level */
1025         if (qeth_set_access_ctrl_online(card, 0))
1026                 return -ENODEV;
1027         return 0;
1028 }
1029
1030 static void qeth_l2_trace_features(struct qeth_card *card)
1031 {
1032         /* Set BridgePort features */
1033         QETH_CARD_TEXT(card, 2, "featuSBP");
1034         QETH_CARD_HEX(card, 2, &card->options.sbp.supported_funcs,
1035                       sizeof(card->options.sbp.supported_funcs));
1036         /* VNIC Characteristics features */
1037         QETH_CARD_TEXT(card, 2, "feaVNICC");
1038         QETH_CARD_HEX(card, 2, &card->options.vnicc.sup_chars,
1039                       sizeof(card->options.vnicc.sup_chars));
1040 }
1041
1042 static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
1043 {
1044         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1045         int rc = 0;
1046         enum qeth_card_states recover_flag;
1047
1048         mutex_lock(&card->discipline_mutex);
1049         mutex_lock(&card->conf_mutex);
1050         QETH_DBF_TEXT(SETUP, 2, "setonlin");
1051         QETH_DBF_HEX(SETUP, 2, &card, sizeof(void *));
1052
1053         recover_flag = card->state;
1054         rc = qeth_core_hardsetup_card(card);
1055         if (rc) {
1056                 QETH_DBF_TEXT_(SETUP, 2, "2err%04x", rc);
1057                 rc = -ENODEV;
1058                 goto out_remove;
1059         }
1060         qeth_bridgeport_query_support(card);
1061         if (card->options.sbp.supported_funcs)
1062                 dev_info(&card->gdev->dev,
1063                 "The device represents a Bridge Capable Port\n");
1064
1065         if (!card->dev && qeth_l2_setup_netdev(card)) {
1066                 rc = -ENODEV;
1067                 goto out_remove;
1068         }
1069
1070         if (card->info.type != QETH_CARD_TYPE_OSN)
1071                 qeth_l2_send_setmac(card, &card->dev->dev_addr[0]);
1072
1073         if (qeth_is_diagass_supported(card, QETH_DIAGS_CMD_TRAP)) {
1074                 if (card->info.hwtrap &&
1075                     qeth_hw_trap(card, QETH_DIAGS_TRAP_ARM))
1076                         card->info.hwtrap = 0;
1077         } else
1078                 card->info.hwtrap = 0;
1079
1080         /* for the rx_bcast characteristic, init VNICC after setmac */
1081         qeth_l2_vnicc_init(card);
1082
1083         qeth_trace_features(card);
1084         qeth_l2_trace_features(card);
1085
1086         qeth_l2_setup_bridgeport_attrs(card);
1087
1088         card->state = CARD_STATE_HARDSETUP;
1089         memset(&card->rx, 0, sizeof(struct qeth_rx));
1090         qeth_print_status_message(card);
1091
1092         /* softsetup */
1093         QETH_DBF_TEXT(SETUP, 2, "softsetp");
1094
1095         if ((card->info.type == QETH_CARD_TYPE_OSD) ||
1096             (card->info.type == QETH_CARD_TYPE_OSX)) {
1097                 rc = qeth_l2_start_ipassists(card);
1098                 if (rc)
1099                         goto out_remove;
1100         }
1101
1102         if (card->info.type != QETH_CARD_TYPE_OSN)
1103                 qeth_l2_process_vlans(card);
1104
1105         netif_tx_disable(card->dev);
1106
1107         rc = qeth_init_qdio_queues(card);
1108         if (rc) {
1109                 QETH_DBF_TEXT_(SETUP, 2, "6err%d", rc);
1110                 rc = -ENODEV;
1111                 goto out_remove;
1112         }
1113         card->state = CARD_STATE_SOFTSETUP;
1114         if (card->lan_online)
1115                 netif_carrier_on(card->dev);
1116         else
1117                 netif_carrier_off(card->dev);
1118
1119         qeth_set_allowed_threads(card, 0xffffffff, 0);
1120         if (recover_flag == CARD_STATE_RECOVER) {
1121                 if (recovery_mode &&
1122                     card->info.type != QETH_CARD_TYPE_OSN) {
1123                         __qeth_l2_open(card->dev);
1124                 } else {
1125                         rtnl_lock();
1126                         dev_open(card->dev);
1127                         rtnl_unlock();
1128                 }
1129                 /* this also sets saved unicast addresses */
1130                 qeth_l2_set_rx_mode(card->dev);
1131                 rtnl_lock();
1132                 qeth_recover_features(card->dev);
1133                 rtnl_unlock();
1134         }
1135         /* let user_space know that device is online */
1136         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
1137         mutex_unlock(&card->conf_mutex);
1138         mutex_unlock(&card->discipline_mutex);
1139         return 0;
1140
1141 out_remove:
1142         qeth_l2_stop_card(card, 0);
1143         ccw_device_set_offline(CARD_DDEV(card));
1144         ccw_device_set_offline(CARD_WDEV(card));
1145         ccw_device_set_offline(CARD_RDEV(card));
1146         qdio_free(CARD_DDEV(card));
1147         if (recover_flag == CARD_STATE_RECOVER)
1148                 card->state = CARD_STATE_RECOVER;
1149         else
1150                 card->state = CARD_STATE_DOWN;
1151         mutex_unlock(&card->conf_mutex);
1152         mutex_unlock(&card->discipline_mutex);
1153         return rc;
1154 }
1155
1156 static int qeth_l2_set_online(struct ccwgroup_device *gdev)
1157 {
1158         return __qeth_l2_set_online(gdev, 0);
1159 }
1160
1161 static int __qeth_l2_set_offline(struct ccwgroup_device *cgdev,
1162                                         int recovery_mode)
1163 {
1164         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1165         int rc = 0, rc2 = 0, rc3 = 0;
1166         enum qeth_card_states recover_flag;
1167
1168         mutex_lock(&card->discipline_mutex);
1169         mutex_lock(&card->conf_mutex);
1170         QETH_DBF_TEXT(SETUP, 3, "setoffl");
1171         QETH_DBF_HEX(SETUP, 3, &card, sizeof(void *));
1172
1173         if (card->dev && netif_carrier_ok(card->dev))
1174                 netif_carrier_off(card->dev);
1175         recover_flag = card->state;
1176         if ((!recovery_mode && card->info.hwtrap) || card->info.hwtrap == 2) {
1177                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1178                 card->info.hwtrap = 1;
1179         }
1180         qeth_l2_stop_card(card, recovery_mode);
1181         rc  = ccw_device_set_offline(CARD_DDEV(card));
1182         rc2 = ccw_device_set_offline(CARD_WDEV(card));
1183         rc3 = ccw_device_set_offline(CARD_RDEV(card));
1184         if (!rc)
1185                 rc = (rc2) ? rc2 : rc3;
1186         if (rc)
1187                 QETH_DBF_TEXT_(SETUP, 2, "1err%d", rc);
1188         qdio_free(CARD_DDEV(card));
1189         if (recover_flag == CARD_STATE_UP)
1190                 card->state = CARD_STATE_RECOVER;
1191         /* let user_space know that device is offline */
1192         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
1193         mutex_unlock(&card->conf_mutex);
1194         mutex_unlock(&card->discipline_mutex);
1195         return 0;
1196 }
1197
1198 static int qeth_l2_set_offline(struct ccwgroup_device *cgdev)
1199 {
1200         return __qeth_l2_set_offline(cgdev, 0);
1201 }
1202
1203 static int qeth_l2_recover(void *ptr)
1204 {
1205         struct qeth_card *card;
1206         int rc = 0;
1207
1208         card = (struct qeth_card *) ptr;
1209         QETH_CARD_TEXT(card, 2, "recover1");
1210         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
1211                 return 0;
1212         QETH_CARD_TEXT(card, 2, "recover2");
1213         dev_warn(&card->gdev->dev,
1214                 "A recovery process has been started for the device\n");
1215         qeth_set_recovery_task(card);
1216         __qeth_l2_set_offline(card->gdev, 1);
1217         rc = __qeth_l2_set_online(card->gdev, 1);
1218         if (!rc)
1219                 dev_info(&card->gdev->dev,
1220                         "Device successfully recovered!\n");
1221         else {
1222                 qeth_close_dev(card);
1223                 dev_warn(&card->gdev->dev, "The qeth device driver "
1224                                 "failed to recover an error on the device\n");
1225         }
1226         qeth_clear_recovery_task(card);
1227         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
1228         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
1229         return 0;
1230 }
1231
1232 static int __init qeth_l2_init(void)
1233 {
1234         pr_info("register layer 2 discipline\n");
1235         return 0;
1236 }
1237
1238 static void __exit qeth_l2_exit(void)
1239 {
1240         pr_info("unregister layer 2 discipline\n");
1241 }
1242
1243 static int qeth_l2_pm_suspend(struct ccwgroup_device *gdev)
1244 {
1245         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1246
1247         if (card->dev)
1248                 netif_device_detach(card->dev);
1249         qeth_set_allowed_threads(card, 0, 1);
1250         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1251         if (gdev->state == CCWGROUP_OFFLINE)
1252                 return 0;
1253         if (card->state == CARD_STATE_UP) {
1254                 if (card->info.hwtrap)
1255                         qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
1256                 __qeth_l2_set_offline(card->gdev, 1);
1257         } else
1258                 __qeth_l2_set_offline(card->gdev, 0);
1259         return 0;
1260 }
1261
1262 static int qeth_l2_pm_resume(struct ccwgroup_device *gdev)
1263 {
1264         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1265         int rc = 0;
1266
1267         if (gdev->state == CCWGROUP_OFFLINE)
1268                 goto out;
1269
1270         if (card->state == CARD_STATE_RECOVER) {
1271                 rc = __qeth_l2_set_online(card->gdev, 1);
1272                 if (rc) {
1273                         rtnl_lock();
1274                         dev_close(card->dev);
1275                         rtnl_unlock();
1276                 }
1277         } else
1278                 rc = __qeth_l2_set_online(card->gdev, 0);
1279 out:
1280         qeth_set_allowed_threads(card, 0xffffffff, 0);
1281         if (card->dev)
1282                 netif_device_attach(card->dev);
1283         if (rc)
1284                 dev_warn(&card->gdev->dev, "The qeth device driver "
1285                         "failed to recover an error on the device\n");
1286         return rc;
1287 }
1288
1289 /* Returns zero if the command is successfully "consumed" */
1290 static int qeth_l2_control_event(struct qeth_card *card,
1291                                         struct qeth_ipa_cmd *cmd)
1292 {
1293         switch (cmd->hdr.command) {
1294         case IPA_CMD_SETBRIDGEPORT_OSA:
1295         case IPA_CMD_SETBRIDGEPORT_IQD:
1296                 if (cmd->data.sbp.hdr.command_code ==
1297                                 IPA_SBP_BRIDGE_PORT_STATE_CHANGE) {
1298                         qeth_bridge_state_change(card, cmd);
1299                         return 0;
1300                 } else
1301                         return 1;
1302         case IPA_CMD_ADDRESS_CHANGE_NOTIF:
1303                 qeth_bridge_host_event(card, cmd);
1304                 return 0;
1305         default:
1306                 return 1;
1307         }
1308 }
1309
1310 struct qeth_discipline qeth_l2_discipline = {
1311         .devtype = &qeth_l2_devtype,
1312         .start_poll = qeth_qdio_start_poll,
1313         .input_handler = (qdio_handler_t *) qeth_qdio_input_handler,
1314         .output_handler = (qdio_handler_t *) qeth_qdio_output_handler,
1315         .process_rx_buffer = qeth_l2_process_inbound_buffer,
1316         .recover = qeth_l2_recover,
1317         .setup = qeth_l2_probe_device,
1318         .remove = qeth_l2_remove_device,
1319         .set_online = qeth_l2_set_online,
1320         .set_offline = qeth_l2_set_offline,
1321         .freeze = qeth_l2_pm_suspend,
1322         .thaw = qeth_l2_pm_resume,
1323         .restore = qeth_l2_pm_resume,
1324         .do_ioctl = NULL,
1325         .control_event_handler = qeth_l2_control_event,
1326 };
1327 EXPORT_SYMBOL_GPL(qeth_l2_discipline);
1328
1329 static int qeth_osn_send_control_data(struct qeth_card *card, int len,
1330                            struct qeth_cmd_buffer *iob)
1331 {
1332         unsigned long flags;
1333         int rc = 0;
1334
1335         QETH_CARD_TEXT(card, 5, "osndctrd");
1336
1337         wait_event(card->wait_q,
1338                    atomic_cmpxchg(&card->write.irq_pending, 0, 1) == 0);
1339         qeth_prepare_control_data(card, len, iob);
1340         QETH_CARD_TEXT(card, 6, "osnoirqp");
1341         spin_lock_irqsave(get_ccwdev_lock(card->write.ccwdev), flags);
1342         rc = ccw_device_start(card->write.ccwdev, &card->write.ccw,
1343                               (addr_t) iob, 0, 0);
1344         spin_unlock_irqrestore(get_ccwdev_lock(card->write.ccwdev), flags);
1345         if (rc) {
1346                 QETH_DBF_MESSAGE(2, "qeth_osn_send_control_data: "
1347                            "ccw_device_start rc = %i\n", rc);
1348                 QETH_CARD_TEXT_(card, 2, " err%d", rc);
1349                 qeth_release_buffer(iob->channel, iob);
1350                 atomic_set(&card->write.irq_pending, 0);
1351                 wake_up(&card->wait_q);
1352         }
1353         return rc;
1354 }
1355
1356 static int qeth_osn_send_ipa_cmd(struct qeth_card *card,
1357                         struct qeth_cmd_buffer *iob, int data_len)
1358 {
1359         u16 s1, s2;
1360
1361         QETH_CARD_TEXT(card, 4, "osndipa");
1362
1363         qeth_prepare_ipa_cmd(card, iob, QETH_PROT_OSN2);
1364         s1 = (u16)(IPA_PDU_HEADER_SIZE + data_len);
1365         s2 = (u16)data_len;
1366         memcpy(QETH_IPA_PDU_LEN_TOTAL(iob->data), &s1, 2);
1367         memcpy(QETH_IPA_PDU_LEN_PDU1(iob->data), &s2, 2);
1368         memcpy(QETH_IPA_PDU_LEN_PDU2(iob->data), &s2, 2);
1369         memcpy(QETH_IPA_PDU_LEN_PDU3(iob->data), &s2, 2);
1370         return qeth_osn_send_control_data(card, s1, iob);
1371 }
1372
1373 int qeth_osn_assist(struct net_device *dev, void *data, int data_len)
1374 {
1375         struct qeth_cmd_buffer *iob;
1376         struct qeth_card *card;
1377         int rc;
1378
1379         if (!dev)
1380                 return -ENODEV;
1381         card = dev->ml_priv;
1382         if (!card)
1383                 return -ENODEV;
1384         QETH_CARD_TEXT(card, 2, "osnsdmc");
1385         if (!qeth_card_hw_is_reachable(card))
1386                 return -ENODEV;
1387         iob = qeth_wait_for_buffer(&card->write);
1388         memcpy(iob->data+IPA_PDU_HEADER_SIZE, data, data_len);
1389         rc = qeth_osn_send_ipa_cmd(card, iob, data_len);
1390         return rc;
1391 }
1392 EXPORT_SYMBOL(qeth_osn_assist);
1393
1394 int qeth_osn_register(unsigned char *read_dev_no, struct net_device **dev,
1395                   int (*assist_cb)(struct net_device *, void *),
1396                   int (*data_cb)(struct sk_buff *))
1397 {
1398         struct qeth_card *card;
1399
1400         *dev = qeth_l2_netdev_by_devno(read_dev_no);
1401         if (*dev == NULL)
1402                 return -ENODEV;
1403         card = (*dev)->ml_priv;
1404         if (!card)
1405                 return -ENODEV;
1406         QETH_CARD_TEXT(card, 2, "osnreg");
1407         if ((assist_cb == NULL) || (data_cb == NULL))
1408                 return -EINVAL;
1409         card->osn_info.assist_cb = assist_cb;
1410         card->osn_info.data_cb = data_cb;
1411         return 0;
1412 }
1413 EXPORT_SYMBOL(qeth_osn_register);
1414
1415 void qeth_osn_deregister(struct net_device *dev)
1416 {
1417         struct qeth_card *card;
1418
1419         if (!dev)
1420                 return;
1421         card = dev->ml_priv;
1422         if (!card)
1423                 return;
1424         QETH_CARD_TEXT(card, 2, "osndereg");
1425         card->osn_info.assist_cb = NULL;
1426         card->osn_info.data_cb = NULL;
1427         return;
1428 }
1429 EXPORT_SYMBOL(qeth_osn_deregister);
1430
1431 /* SETBRIDGEPORT support, async notifications */
1432
1433 enum qeth_an_event_type {anev_reg_unreg, anev_abort, anev_reset};
1434
1435 /**
1436  * qeth_bridge_emit_host_event() - bridgeport address change notification
1437  * @card:  qeth_card structure pointer, for udev events.
1438  * @evtype:  "normal" register/unregister, or abort, or reset. For abort
1439  *            and reset token and addr_lnid are unused and may be NULL.
1440  * @code:  event bitmask: high order bit 0x80 value 1 means removal of an
1441  *                        object, 0 - addition of an object.
1442  *                        0x01 - VLAN, 0x02 - MAC, 0x03 - VLAN and MAC.
1443  * @token: "network token" structure identifying physical address of the port.
1444  * @addr_lnid: pointer to structure with MAC address and VLAN ID.
1445  *
1446  * This function is called when registrations and deregistrations are
1447  * reported by the hardware, and also when notifications are enabled -
1448  * for all currently registered addresses.
1449  */
1450 static void qeth_bridge_emit_host_event(struct qeth_card *card,
1451         enum qeth_an_event_type evtype,
1452         u8 code, struct net_if_token *token, struct mac_addr_lnid *addr_lnid)
1453 {
1454         char str[7][32];
1455         char *env[8];
1456         int i = 0;
1457
1458         switch (evtype) {
1459         case anev_reg_unreg:
1460                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=%s",
1461                                 (code & IPA_ADDR_CHANGE_CODE_REMOVAL)
1462                                 ? "deregister" : "register");
1463                 env[i] = str[i]; i++;
1464                 if (code & IPA_ADDR_CHANGE_CODE_VLANID) {
1465                         snprintf(str[i], sizeof(str[i]), "VLAN=%d",
1466                                 addr_lnid->lnid);
1467                         env[i] = str[i]; i++;
1468                 }
1469                 if (code & IPA_ADDR_CHANGE_CODE_MACADDR) {
1470                         snprintf(str[i], sizeof(str[i]), "MAC=%pM",
1471                                 addr_lnid->mac);
1472                         env[i] = str[i]; i++;
1473                 }
1474                 snprintf(str[i], sizeof(str[i]), "NTOK_BUSID=%x.%x.%04x",
1475                         token->cssid, token->ssid, token->devnum);
1476                 env[i] = str[i]; i++;
1477                 snprintf(str[i], sizeof(str[i]), "NTOK_IID=%02x", token->iid);
1478                 env[i] = str[i]; i++;
1479                 snprintf(str[i], sizeof(str[i]), "NTOK_CHPID=%02x",
1480                                 token->chpid);
1481                 env[i] = str[i]; i++;
1482                 snprintf(str[i], sizeof(str[i]), "NTOK_CHID=%04x", token->chid);
1483                 env[i] = str[i]; i++;
1484                 break;
1485         case anev_abort:
1486                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=abort");
1487                 env[i] = str[i]; i++;
1488                 break;
1489         case anev_reset:
1490                 snprintf(str[i], sizeof(str[i]), "BRIDGEDHOST=reset");
1491                 env[i] = str[i]; i++;
1492                 break;
1493         }
1494         env[i] = NULL;
1495         kobject_uevent_env(&card->gdev->dev.kobj, KOBJ_CHANGE, env);
1496 }
1497
1498 struct qeth_bridge_state_data {
1499         struct work_struct worker;
1500         struct qeth_card *card;
1501         struct qeth_sbp_state_change qports;
1502 };
1503
1504 static void qeth_bridge_state_change_worker(struct work_struct *work)
1505 {
1506         struct qeth_bridge_state_data *data =
1507                 container_of(work, struct qeth_bridge_state_data, worker);
1508         /* We are only interested in the first entry - local port */
1509         struct qeth_sbp_port_entry *entry = &data->qports.entry[0];
1510         char env_locrem[32];
1511         char env_role[32];
1512         char env_state[32];
1513         char *env[] = {
1514                 env_locrem,
1515                 env_role,
1516                 env_state,
1517                 NULL
1518         };
1519
1520         /* Role should not change by itself, but if it did, */
1521         /* information from the hardware is authoritative.  */
1522         mutex_lock(&data->card->conf_mutex);
1523         data->card->options.sbp.role = entry->role;
1524         mutex_unlock(&data->card->conf_mutex);
1525
1526         snprintf(env_locrem, sizeof(env_locrem), "BRIDGEPORT=statechange");
1527         snprintf(env_role, sizeof(env_role), "ROLE=%s",
1528                 (entry->role == QETH_SBP_ROLE_NONE) ? "none" :
1529                 (entry->role == QETH_SBP_ROLE_PRIMARY) ? "primary" :
1530                 (entry->role == QETH_SBP_ROLE_SECONDARY) ? "secondary" :
1531                 "<INVALID>");
1532         snprintf(env_state, sizeof(env_state), "STATE=%s",
1533                 (entry->state == QETH_SBP_STATE_INACTIVE) ? "inactive" :
1534                 (entry->state == QETH_SBP_STATE_STANDBY) ? "standby" :
1535                 (entry->state == QETH_SBP_STATE_ACTIVE) ? "active" :
1536                 "<INVALID>");
1537         kobject_uevent_env(&data->card->gdev->dev.kobj,
1538                                 KOBJ_CHANGE, env);
1539         kfree(data);
1540 }
1541
1542 static void qeth_bridge_state_change(struct qeth_card *card,
1543                                         struct qeth_ipa_cmd *cmd)
1544 {
1545         struct qeth_sbp_state_change *qports =
1546                  &cmd->data.sbp.data.state_change;
1547         struct qeth_bridge_state_data *data;
1548         int extrasize;
1549
1550         QETH_CARD_TEXT(card, 2, "brstchng");
1551         if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1552                 QETH_CARD_TEXT_(card, 2, "BPsz%04x", qports->entry_length);
1553                 return;
1554         }
1555         extrasize = sizeof(struct qeth_sbp_port_entry) * qports->num_entries;
1556         data = kzalloc(sizeof(struct qeth_bridge_state_data) + extrasize,
1557                 GFP_ATOMIC);
1558         if (!data) {
1559                 QETH_CARD_TEXT(card, 2, "BPSalloc");
1560                 return;
1561         }
1562         INIT_WORK(&data->worker, qeth_bridge_state_change_worker);
1563         data->card = card;
1564         memcpy(&data->qports, qports,
1565                         sizeof(struct qeth_sbp_state_change) + extrasize);
1566         queue_work(qeth_wq, &data->worker);
1567 }
1568
1569 struct qeth_bridge_host_data {
1570         struct work_struct worker;
1571         struct qeth_card *card;
1572         struct qeth_ipacmd_addr_change hostevs;
1573 };
1574
1575 static void qeth_bridge_host_event_worker(struct work_struct *work)
1576 {
1577         struct qeth_bridge_host_data *data =
1578                 container_of(work, struct qeth_bridge_host_data, worker);
1579         int i;
1580
1581         if (data->hostevs.lost_event_mask) {
1582                 dev_info(&data->card->gdev->dev,
1583 "Address notification from the Bridge Port stopped %s (%s)\n",
1584                         data->card->dev->name,
1585                         (data->hostevs.lost_event_mask == 0x01)
1586                         ? "Overflow"
1587                         : (data->hostevs.lost_event_mask == 0x02)
1588                         ? "Bridge port state change"
1589                         : "Unknown reason");
1590                 mutex_lock(&data->card->conf_mutex);
1591                 data->card->options.sbp.hostnotification = 0;
1592                 mutex_unlock(&data->card->conf_mutex);
1593                 qeth_bridge_emit_host_event(data->card, anev_abort,
1594                         0, NULL, NULL);
1595         } else
1596                 for (i = 0; i < data->hostevs.num_entries; i++) {
1597                         struct qeth_ipacmd_addr_change_entry *entry =
1598                                         &data->hostevs.entry[i];
1599                         qeth_bridge_emit_host_event(data->card,
1600                                         anev_reg_unreg,
1601                                         entry->change_code,
1602                                         &entry->token, &entry->addr_lnid);
1603                 }
1604         kfree(data);
1605 }
1606
1607 static void qeth_bridge_host_event(struct qeth_card *card,
1608                                         struct qeth_ipa_cmd *cmd)
1609 {
1610         struct qeth_ipacmd_addr_change *hostevs =
1611                  &cmd->data.addrchange;
1612         struct qeth_bridge_host_data *data;
1613         int extrasize;
1614
1615         QETH_CARD_TEXT(card, 2, "brhostev");
1616         if (cmd->hdr.return_code != 0x0000) {
1617                 if (cmd->hdr.return_code == 0x0010) {
1618                         if (hostevs->lost_event_mask == 0x00)
1619                                 hostevs->lost_event_mask = 0xff;
1620                 } else {
1621                         QETH_CARD_TEXT_(card, 2, "BPHe%04x",
1622                                 cmd->hdr.return_code);
1623                         return;
1624                 }
1625         }
1626         extrasize = sizeof(struct qeth_ipacmd_addr_change_entry) *
1627                                                 hostevs->num_entries;
1628         data = kzalloc(sizeof(struct qeth_bridge_host_data) + extrasize,
1629                 GFP_ATOMIC);
1630         if (!data) {
1631                 QETH_CARD_TEXT(card, 2, "BPHalloc");
1632                 return;
1633         }
1634         INIT_WORK(&data->worker, qeth_bridge_host_event_worker);
1635         data->card = card;
1636         memcpy(&data->hostevs, hostevs,
1637                         sizeof(struct qeth_ipacmd_addr_change) + extrasize);
1638         queue_work(qeth_wq, &data->worker);
1639 }
1640
1641 /* SETBRIDGEPORT support; sending commands */
1642
1643 struct _qeth_sbp_cbctl {
1644         u16 ipa_rc;
1645         u16 cmd_rc;
1646         union {
1647                 u32 supported;
1648                 struct {
1649                         enum qeth_sbp_roles *role;
1650                         enum qeth_sbp_states *state;
1651                 } qports;
1652         } data;
1653 };
1654
1655 /**
1656  * qeth_bridgeport_makerc() - derive "traditional" error from hardware codes.
1657  * @card:                     qeth_card structure pointer, for debug messages.
1658  * @cbctl:                    state structure with hardware return codes.
1659  * @setcmd:                   IPA command code
1660  *
1661  * Returns negative errno-compatible error indication or 0 on success.
1662  */
1663 static int qeth_bridgeport_makerc(struct qeth_card *card,
1664         struct _qeth_sbp_cbctl *cbctl, enum qeth_ipa_sbp_cmd setcmd)
1665 {
1666         int rc;
1667         int is_iqd = (card->info.type == QETH_CARD_TYPE_IQD);
1668
1669         if ((is_iqd && (cbctl->ipa_rc == IPA_RC_SUCCESS)) ||
1670             (!is_iqd && (cbctl->ipa_rc == cbctl->cmd_rc)))
1671                 switch (cbctl->cmd_rc) {
1672                 case IPA_RC_SUCCESS:
1673                         rc = 0;
1674                         break;
1675                 case IPA_RC_L2_UNSUPPORTED_CMD:
1676                 case IPA_RC_UNSUPPORTED_COMMAND:
1677                         rc = -EOPNOTSUPP;
1678                         break;
1679                 case IPA_RC_SBP_OSA_NOT_CONFIGURED:
1680                 case IPA_RC_SBP_IQD_NOT_CONFIGURED:
1681                         rc = -ENODEV; /* maybe not the best code here? */
1682                         dev_err(&card->gdev->dev,
1683         "The device is not configured as a Bridge Port\n");
1684                         break;
1685                 case IPA_RC_SBP_OSA_OS_MISMATCH:
1686                 case IPA_RC_SBP_IQD_OS_MISMATCH:
1687                         rc = -EPERM;
1688                         dev_err(&card->gdev->dev,
1689         "A Bridge Port is already configured by a different operating system\n");
1690                         break;
1691                 case IPA_RC_SBP_OSA_ANO_DEV_PRIMARY:
1692                 case IPA_RC_SBP_IQD_ANO_DEV_PRIMARY:
1693                         switch (setcmd) {
1694                         case IPA_SBP_SET_PRIMARY_BRIDGE_PORT:
1695                                 rc = -EEXIST;
1696                                 dev_err(&card->gdev->dev,
1697         "The LAN already has a primary Bridge Port\n");
1698                                 break;
1699                         case IPA_SBP_SET_SECONDARY_BRIDGE_PORT:
1700                                 rc = -EBUSY;
1701                                 dev_err(&card->gdev->dev,
1702         "The device is already a primary Bridge Port\n");
1703                                 break;
1704                         default:
1705                                 rc = -EIO;
1706                         }
1707                         break;
1708                 case IPA_RC_SBP_OSA_CURRENT_SECOND:
1709                 case IPA_RC_SBP_IQD_CURRENT_SECOND:
1710                         rc = -EBUSY;
1711                         dev_err(&card->gdev->dev,
1712         "The device is already a secondary Bridge Port\n");
1713                         break;
1714                 case IPA_RC_SBP_OSA_LIMIT_SECOND:
1715                 case IPA_RC_SBP_IQD_LIMIT_SECOND:
1716                         rc = -EEXIST;
1717                         dev_err(&card->gdev->dev,
1718         "The LAN cannot have more secondary Bridge Ports\n");
1719                         break;
1720                 case IPA_RC_SBP_OSA_CURRENT_PRIMARY:
1721                 case IPA_RC_SBP_IQD_CURRENT_PRIMARY:
1722                         rc = -EBUSY;
1723                         dev_err(&card->gdev->dev,
1724         "The device is already a primary Bridge Port\n");
1725                         break;
1726                 case IPA_RC_SBP_OSA_NOT_AUTHD_BY_ZMAN:
1727                 case IPA_RC_SBP_IQD_NOT_AUTHD_BY_ZMAN:
1728                         rc = -EACCES;
1729                         dev_err(&card->gdev->dev,
1730         "The device is not authorized to be a Bridge Port\n");
1731                         break;
1732                 default:
1733                         rc = -EIO;
1734                 }
1735         else
1736                 switch (cbctl->ipa_rc) {
1737                 case IPA_RC_NOTSUPP:
1738                         rc = -EOPNOTSUPP;
1739                         break;
1740                 case IPA_RC_UNSUPPORTED_COMMAND:
1741                         rc = -EOPNOTSUPP;
1742                         break;
1743                 default:
1744                         rc = -EIO;
1745                 }
1746
1747         if (rc) {
1748                 QETH_CARD_TEXT_(card, 2, "SBPi%04x", cbctl->ipa_rc);
1749                 QETH_CARD_TEXT_(card, 2, "SBPc%04x", cbctl->cmd_rc);
1750         }
1751         return rc;
1752 }
1753
1754 static struct qeth_cmd_buffer *qeth_sbp_build_cmd(struct qeth_card *card,
1755                                                   enum qeth_ipa_sbp_cmd sbp_cmd,
1756                                                   unsigned int cmd_length)
1757 {
1758         enum qeth_ipa_cmds ipa_cmd = (card->info.type == QETH_CARD_TYPE_IQD) ?
1759                                         IPA_CMD_SETBRIDGEPORT_IQD :
1760                                         IPA_CMD_SETBRIDGEPORT_OSA;
1761         struct qeth_cmd_buffer *iob;
1762         struct qeth_ipa_cmd *cmd;
1763
1764         iob = qeth_get_ipacmd_buffer(card, ipa_cmd, 0);
1765         if (!iob)
1766                 return iob;
1767         cmd = (struct qeth_ipa_cmd *)(iob->data+IPA_PDU_HEADER_SIZE);
1768         cmd->data.sbp.hdr.cmdlength = sizeof(struct qeth_ipacmd_sbp_hdr) +
1769                                       cmd_length;
1770         cmd->data.sbp.hdr.command_code = sbp_cmd;
1771         cmd->data.sbp.hdr.used_total = 1;
1772         cmd->data.sbp.hdr.seq_no = 1;
1773         return iob;
1774 }
1775
1776 static int qeth_bridgeport_query_support_cb(struct qeth_card *card,
1777         struct qeth_reply *reply, unsigned long data)
1778 {
1779         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1780         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1781         QETH_CARD_TEXT(card, 2, "brqsupcb");
1782         cbctl->ipa_rc = cmd->hdr.return_code;
1783         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1784         if ((cbctl->ipa_rc == 0) && (cbctl->cmd_rc == 0)) {
1785                 cbctl->data.supported =
1786                         cmd->data.sbp.data.query_cmds_supp.supported_cmds;
1787         } else {
1788                 cbctl->data.supported = 0;
1789         }
1790         return 0;
1791 }
1792
1793 /**
1794  * qeth_bridgeport_query_support() - store bitmask of supported subfunctions.
1795  * @card:                            qeth_card structure pointer.
1796  *
1797  * Sets bitmask of supported setbridgeport subfunctions in the qeth_card
1798  * strucutre: card->options.sbp.supported_funcs.
1799  */
1800 static void qeth_bridgeport_query_support(struct qeth_card *card)
1801 {
1802         struct qeth_cmd_buffer *iob;
1803         struct _qeth_sbp_cbctl cbctl;
1804
1805         QETH_CARD_TEXT(card, 2, "brqsuppo");
1806         iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_COMMANDS_SUPPORTED,
1807                                  sizeof(struct qeth_sbp_query_cmds_supp));
1808         if (!iob)
1809                 return;
1810         if (qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_support_cb,
1811                                                         (void *)&cbctl) ||
1812             qeth_bridgeport_makerc(card, &cbctl,
1813                                         IPA_SBP_QUERY_COMMANDS_SUPPORTED)) {
1814                 /* non-zero makerc signifies failure, and produce messages */
1815                 card->options.sbp.role = QETH_SBP_ROLE_NONE;
1816                 return;
1817         }
1818         card->options.sbp.supported_funcs = cbctl.data.supported;
1819 }
1820
1821 static int qeth_bridgeport_query_ports_cb(struct qeth_card *card,
1822         struct qeth_reply *reply, unsigned long data)
1823 {
1824         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1825         struct qeth_sbp_query_ports *qports = &cmd->data.sbp.data.query_ports;
1826         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1827
1828         QETH_CARD_TEXT(card, 2, "brqprtcb");
1829         cbctl->ipa_rc = cmd->hdr.return_code;
1830         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1831         if ((cbctl->ipa_rc != 0) || (cbctl->cmd_rc != 0))
1832                 return 0;
1833         if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) {
1834                 cbctl->cmd_rc = 0xffff;
1835                 QETH_CARD_TEXT_(card, 2, "SBPs%04x", qports->entry_length);
1836                 return 0;
1837         }
1838         /* first entry contains the state of the local port */
1839         if (qports->num_entries > 0) {
1840                 if (cbctl->data.qports.role)
1841                         *cbctl->data.qports.role = qports->entry[0].role;
1842                 if (cbctl->data.qports.state)
1843                         *cbctl->data.qports.state = qports->entry[0].state;
1844         }
1845         return 0;
1846 }
1847
1848 /**
1849  * qeth_bridgeport_query_ports() - query local bridgeport status.
1850  * @card:                          qeth_card structure pointer.
1851  * @role:   Role of the port: 0-none, 1-primary, 2-secondary.
1852  * @state:  State of the port: 0-inactive, 1-standby, 2-active.
1853  *
1854  * Returns negative errno-compatible error indication or 0 on success.
1855  *
1856  * 'role' and 'state' are not updated in case of hardware operation failure.
1857  */
1858 int qeth_bridgeport_query_ports(struct qeth_card *card,
1859         enum qeth_sbp_roles *role, enum qeth_sbp_states *state)
1860 {
1861         int rc = 0;
1862         struct qeth_cmd_buffer *iob;
1863         struct _qeth_sbp_cbctl cbctl = {
1864                 .data = {
1865                         .qports = {
1866                                 .role = role,
1867                                 .state = state,
1868                         },
1869                 },
1870         };
1871
1872         QETH_CARD_TEXT(card, 2, "brqports");
1873         if (!(card->options.sbp.supported_funcs & IPA_SBP_QUERY_BRIDGE_PORTS))
1874                 return -EOPNOTSUPP;
1875         iob = qeth_sbp_build_cmd(card, IPA_SBP_QUERY_BRIDGE_PORTS, 0);
1876         if (!iob)
1877                 return -ENOMEM;
1878         rc = qeth_send_ipa_cmd(card, iob, qeth_bridgeport_query_ports_cb,
1879                                 (void *)&cbctl);
1880         if (rc < 0)
1881                 return rc;
1882         return qeth_bridgeport_makerc(card, &cbctl, IPA_SBP_QUERY_BRIDGE_PORTS);
1883 }
1884 EXPORT_SYMBOL_GPL(qeth_bridgeport_query_ports);
1885
1886 static int qeth_bridgeport_set_cb(struct qeth_card *card,
1887         struct qeth_reply *reply, unsigned long data)
1888 {
1889         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *)data;
1890         struct _qeth_sbp_cbctl *cbctl = (struct _qeth_sbp_cbctl *)reply->param;
1891         QETH_CARD_TEXT(card, 2, "brsetrcb");
1892         cbctl->ipa_rc = cmd->hdr.return_code;
1893         cbctl->cmd_rc = cmd->data.sbp.hdr.return_code;
1894         return 0;
1895 }
1896
1897 /**
1898  * qeth_bridgeport_setrole() - Assign primary role to the port.
1899  * @card:                      qeth_card structure pointer.
1900  * @role:                      Role to assign.
1901  *
1902  * Returns negative errno-compatible error indication or 0 on success.
1903  */
1904 int qeth_bridgeport_setrole(struct qeth_card *card, enum qeth_sbp_roles role)
1905 {
1906         int rc = 0;
1907         int cmdlength;
1908         struct qeth_cmd_buffer *iob;
1909         struct _qeth_sbp_cbctl cbctl;
1910         enum qeth_ipa_sbp_cmd setcmd;
1911
1912         QETH_CARD_TEXT(card, 2, "brsetrol");
1913         switch (role) {
1914         case QETH_SBP_ROLE_NONE:
1915                 setcmd = IPA_SBP_RESET_BRIDGE_PORT_ROLE;
1916                 cmdlength = sizeof(struct qeth_sbp_reset_role);
1917                 break;
1918         case QETH_SBP_ROLE_PRIMARY:
1919                 setcmd = IPA_SBP_SET_PRIMARY_BRIDGE_PORT;
1920                 cmdlength = sizeof(struct qeth_sbp_set_primary);
1921                 break;
1922         case QETH_SBP_ROLE_SECONDARY:
1923                 setcmd = IPA_SBP_SET_SECONDARY_BRIDGE_PORT;
1924                 cmdlength = sizeof(struct qeth_sbp_set_secondary);
1925                 break;
1926         default:
1927                 return -EINVAL;
1928         }
1929         if (!(card->options.sbp.supported_funcs & setcmd))
1930                 return -EOPNOTSUPP;
1931         iob = qeth_sbp_build_cmd(card, setcmd, cmdlength);
1932         if (!iob)
1933                 return -ENOMEM;
1934         rc = qeth_send_ipa_cmd(card, iob, qeth_bridgeport_set_cb,
1935                                 (void *)&cbctl);
1936         if (rc < 0)
1937                 return rc;
1938         return qeth_bridgeport_makerc(card, &cbctl, setcmd);
1939 }
1940
1941 /**
1942  * qeth_anset_makerc() - derive "traditional" error from hardware codes.
1943  * @card:                     qeth_card structure pointer, for debug messages.
1944  *
1945  * Returns negative errno-compatible error indication or 0 on success.
1946  */
1947 static int qeth_anset_makerc(struct qeth_card *card, int pnso_rc, u16 response)
1948 {
1949         int rc;
1950
1951         if (pnso_rc == 0)
1952                 switch (response) {
1953                 case 0x0001:
1954                         rc = 0;
1955                         break;
1956                 case 0x0004:
1957                 case 0x0100:
1958                 case 0x0106:
1959                         rc = -EOPNOTSUPP;
1960                         dev_err(&card->gdev->dev,
1961                                 "Setting address notification failed\n");
1962                         break;
1963                 case 0x0107:
1964                         rc = -EAGAIN;
1965                         break;
1966                 default:
1967                         rc = -EIO;
1968                 }
1969         else
1970                 rc = -EIO;
1971
1972         if (rc) {
1973                 QETH_CARD_TEXT_(card, 2, "SBPp%04x", pnso_rc);
1974                 QETH_CARD_TEXT_(card, 2, "SBPr%04x", response);
1975         }
1976         return rc;
1977 }
1978
1979 static void qeth_bridgeport_an_set_cb(void *priv,
1980                 enum qdio_brinfo_entry_type type, void *entry)
1981 {
1982         struct qeth_card *card = (struct qeth_card *)priv;
1983         struct qdio_brinfo_entry_l2 *l2entry;
1984         u8 code;
1985
1986         if (type != l2_addr_lnid) {
1987                 WARN_ON_ONCE(1);
1988                 return;
1989         }
1990
1991         l2entry = (struct qdio_brinfo_entry_l2 *)entry;
1992         code = IPA_ADDR_CHANGE_CODE_MACADDR;
1993         if (l2entry->addr_lnid.lnid)
1994                 code |= IPA_ADDR_CHANGE_CODE_VLANID;
1995         qeth_bridge_emit_host_event(card, anev_reg_unreg, code,
1996                 (struct net_if_token *)&l2entry->nit,
1997                 (struct mac_addr_lnid *)&l2entry->addr_lnid);
1998 }
1999
2000 /**
2001  * qeth_bridgeport_an_set() - Enable or disable bridgeport address notification
2002  * @card:                     qeth_card structure pointer.
2003  * @enable:                   0 - disable, non-zero - enable notifications
2004  *
2005  * Returns negative errno-compatible error indication or 0 on success.
2006  *
2007  * On enable, emits a series of address notifications udev events for all
2008  * currently registered hosts.
2009  */
2010 int qeth_bridgeport_an_set(struct qeth_card *card, int enable)
2011 {
2012         int rc;
2013         u16 response;
2014         struct ccw_device *ddev;
2015         struct subchannel_id schid;
2016
2017         if (!card)
2018                 return -EINVAL;
2019         if (!card->options.sbp.supported_funcs)
2020                 return -EOPNOTSUPP;
2021         ddev = CARD_DDEV(card);
2022         ccw_device_get_schid(ddev, &schid);
2023
2024         if (enable) {
2025                 qeth_bridge_emit_host_event(card, anev_reset, 0, NULL, NULL);
2026                 rc = qdio_pnso_brinfo(schid, 1, &response,
2027                         qeth_bridgeport_an_set_cb, card);
2028         } else
2029                 rc = qdio_pnso_brinfo(schid, 0, &response, NULL, NULL);
2030         return qeth_anset_makerc(card, rc, response);
2031 }
2032 EXPORT_SYMBOL_GPL(qeth_bridgeport_an_set);
2033
2034 static bool qeth_bridgeport_is_in_use(struct qeth_card *card)
2035 {
2036         return (card->options.sbp.role || card->options.sbp.reflect_promisc ||
2037                 card->options.sbp.hostnotification);
2038 }
2039
2040 /* VNIC Characteristics support */
2041
2042 /* handle VNICC IPA command return codes; convert to error codes */
2043 static int qeth_l2_vnicc_makerc(struct qeth_card *card, int ipa_rc)
2044 {
2045         int rc;
2046
2047         switch (ipa_rc) {
2048         case IPA_RC_SUCCESS:
2049                 return ipa_rc;
2050         case IPA_RC_L2_UNSUPPORTED_CMD:
2051         case IPA_RC_NOTSUPP:
2052                 rc = -EOPNOTSUPP;
2053                 break;
2054         case IPA_RC_VNICC_OOSEQ:
2055                 rc = -EALREADY;
2056                 break;
2057         case IPA_RC_VNICC_VNICBP:
2058                 rc = -EBUSY;
2059                 break;
2060         case IPA_RC_L2_ADDR_TABLE_FULL:
2061                 rc = -ENOSPC;
2062                 break;
2063         case IPA_RC_L2_MAC_NOT_AUTH_BY_ADP:
2064                 rc = -EACCES;
2065                 break;
2066         default:
2067                 rc = -EIO;
2068         }
2069
2070         QETH_CARD_TEXT_(card, 2, "err%04x", ipa_rc);
2071         return rc;
2072 }
2073
2074 /* generic VNICC request call back control */
2075 struct _qeth_l2_vnicc_request_cbctl {
2076         u32 sub_cmd;
2077         struct {
2078                 u32 vnic_char;
2079                 u32 timeout;
2080         } param;
2081         struct {
2082                 union{
2083                         u32 *sup_cmds;
2084                         u32 *timeout;
2085                 };
2086         } result;
2087 };
2088
2089 /* generic VNICC request call back */
2090 static int qeth_l2_vnicc_request_cb(struct qeth_card *card,
2091                                     struct qeth_reply *reply,
2092                                     unsigned long data)
2093 {
2094         struct _qeth_l2_vnicc_request_cbctl *cbctl =
2095                 (struct _qeth_l2_vnicc_request_cbctl *) reply->param;
2096         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
2097         struct qeth_ipacmd_vnicc *rep = &cmd->data.vnicc;
2098
2099         QETH_CARD_TEXT(card, 2, "vniccrcb");
2100         if (cmd->hdr.return_code)
2101                 return 0;
2102         /* return results to caller */
2103         card->options.vnicc.sup_chars = rep->hdr.sup;
2104         card->options.vnicc.cur_chars = rep->hdr.cur;
2105
2106         if (cbctl->sub_cmd == IPA_VNICC_QUERY_CMDS)
2107                 *cbctl->result.sup_cmds = rep->query_cmds.sup_cmds;
2108
2109         if (cbctl->sub_cmd == IPA_VNICC_GET_TIMEOUT)
2110                 *cbctl->result.timeout = rep->getset_timeout.timeout;
2111
2112         return 0;
2113 }
2114
2115 /* generic VNICC request */
2116 static int qeth_l2_vnicc_request(struct qeth_card *card,
2117                                  struct _qeth_l2_vnicc_request_cbctl *cbctl)
2118 {
2119         struct qeth_ipacmd_vnicc *req;
2120         struct qeth_cmd_buffer *iob;
2121         struct qeth_ipa_cmd *cmd;
2122         int rc;
2123
2124         QETH_CARD_TEXT(card, 2, "vniccreq");
2125
2126         /* get new buffer for request */
2127         iob = qeth_get_ipacmd_buffer(card, IPA_CMD_VNICC, 0);
2128         if (!iob)
2129                 return -ENOMEM;
2130
2131         /* create header for request */
2132         cmd = (struct qeth_ipa_cmd *)(iob->data + IPA_PDU_HEADER_SIZE);
2133         req = &cmd->data.vnicc;
2134
2135         /* create sub command header for request */
2136         req->sub_hdr.data_length = sizeof(req->sub_hdr);
2137         req->sub_hdr.sub_command = cbctl->sub_cmd;
2138
2139         /* create sub command specific request fields */
2140         switch (cbctl->sub_cmd) {
2141         case IPA_VNICC_QUERY_CHARS:
2142                 break;
2143         case IPA_VNICC_QUERY_CMDS:
2144                 req->sub_hdr.data_length += sizeof(req->query_cmds);
2145                 req->query_cmds.vnic_char = cbctl->param.vnic_char;
2146                 break;
2147         case IPA_VNICC_ENABLE:
2148         case IPA_VNICC_DISABLE:
2149                 req->sub_hdr.data_length += sizeof(req->set_char);
2150                 req->set_char.vnic_char = cbctl->param.vnic_char;
2151                 break;
2152         case IPA_VNICC_SET_TIMEOUT:
2153                 req->getset_timeout.timeout = cbctl->param.timeout;
2154                 /* fallthrough */
2155         case IPA_VNICC_GET_TIMEOUT:
2156                 req->sub_hdr.data_length += sizeof(req->getset_timeout);
2157                 req->getset_timeout.vnic_char = cbctl->param.vnic_char;
2158                 break;
2159         default:
2160                 qeth_release_buffer(iob->channel, iob);
2161                 return -EOPNOTSUPP;
2162         }
2163
2164         /* send request */
2165         rc = qeth_send_ipa_cmd(card, iob, qeth_l2_vnicc_request_cb,
2166                                (void *) cbctl);
2167
2168         return qeth_l2_vnicc_makerc(card, rc);
2169 }
2170
2171 /* VNICC query VNIC characteristics request */
2172 static int qeth_l2_vnicc_query_chars(struct qeth_card *card)
2173 {
2174         struct _qeth_l2_vnicc_request_cbctl cbctl;
2175
2176         /* prepare callback control */
2177         cbctl.sub_cmd = IPA_VNICC_QUERY_CHARS;
2178
2179         QETH_CARD_TEXT(card, 2, "vniccqch");
2180         return qeth_l2_vnicc_request(card, &cbctl);
2181 }
2182
2183 /* VNICC query sub commands request */
2184 static int qeth_l2_vnicc_query_cmds(struct qeth_card *card, u32 vnic_char,
2185                                     u32 *sup_cmds)
2186 {
2187         struct _qeth_l2_vnicc_request_cbctl cbctl;
2188
2189         /* prepare callback control */
2190         cbctl.sub_cmd = IPA_VNICC_QUERY_CMDS;
2191         cbctl.param.vnic_char = vnic_char;
2192         cbctl.result.sup_cmds = sup_cmds;
2193
2194         QETH_CARD_TEXT(card, 2, "vniccqcm");
2195         return qeth_l2_vnicc_request(card, &cbctl);
2196 }
2197
2198 /* VNICC enable/disable characteristic request */
2199 static int qeth_l2_vnicc_set_char(struct qeth_card *card, u32 vnic_char,
2200                                       u32 cmd)
2201 {
2202         struct _qeth_l2_vnicc_request_cbctl cbctl;
2203
2204         /* prepare callback control */
2205         cbctl.sub_cmd = cmd;
2206         cbctl.param.vnic_char = vnic_char;
2207
2208         QETH_CARD_TEXT(card, 2, "vniccedc");
2209         return qeth_l2_vnicc_request(card, &cbctl);
2210 }
2211
2212 /* VNICC get/set timeout for characteristic request */
2213 static int qeth_l2_vnicc_getset_timeout(struct qeth_card *card, u32 vnicc,
2214                                         u32 cmd, u32 *timeout)
2215 {
2216         struct _qeth_l2_vnicc_request_cbctl cbctl;
2217
2218         /* prepare callback control */
2219         cbctl.sub_cmd = cmd;
2220         cbctl.param.vnic_char = vnicc;
2221         if (cmd == IPA_VNICC_SET_TIMEOUT)
2222                 cbctl.param.timeout = *timeout;
2223         if (cmd == IPA_VNICC_GET_TIMEOUT)
2224                 cbctl.result.timeout = timeout;
2225
2226         QETH_CARD_TEXT(card, 2, "vniccgst");
2227         return qeth_l2_vnicc_request(card, &cbctl);
2228 }
2229
2230 /* set current VNICC flag state; called from sysfs store function */
2231 int qeth_l2_vnicc_set_state(struct qeth_card *card, u32 vnicc, bool state)
2232 {
2233         int rc = 0;
2234         u32 cmd;
2235
2236         QETH_CARD_TEXT(card, 2, "vniccsch");
2237
2238         /* do not change anything if BridgePort is enabled */
2239         if (qeth_bridgeport_is_in_use(card))
2240                 return -EBUSY;
2241
2242         /* check if characteristic and enable/disable are supported */
2243         if (!(card->options.vnicc.sup_chars & vnicc) ||
2244             !(card->options.vnicc.set_char_sup & vnicc))
2245                 return -EOPNOTSUPP;
2246
2247         /* set enable/disable command and store wanted characteristic */
2248         if (state) {
2249                 cmd = IPA_VNICC_ENABLE;
2250                 card->options.vnicc.wanted_chars |= vnicc;
2251         } else {
2252                 cmd = IPA_VNICC_DISABLE;
2253                 card->options.vnicc.wanted_chars &= ~vnicc;
2254         }
2255
2256         /* do we need to do anything? */
2257         if (card->options.vnicc.cur_chars == card->options.vnicc.wanted_chars)
2258                 return rc;
2259
2260         /* if card is not ready, simply stop here */
2261         if (!qeth_card_hw_is_reachable(card)) {
2262                 if (state)
2263                         card->options.vnicc.cur_chars |= vnicc;
2264                 else
2265                         card->options.vnicc.cur_chars &= ~vnicc;
2266                 return rc;
2267         }
2268
2269         rc = qeth_l2_vnicc_set_char(card, vnicc, cmd);
2270         if (rc)
2271                 card->options.vnicc.wanted_chars =
2272                         card->options.vnicc.cur_chars;
2273         else {
2274                 /* successful online VNICC change; handle special cases */
2275                 if (state && vnicc == QETH_VNICC_RX_BCAST)
2276                         card->options.vnicc.rx_bcast_enabled = true;
2277                 if (!state && vnicc == QETH_VNICC_LEARNING)
2278                         qeth_l2_vnicc_recover_timeout(card, vnicc,
2279                                         &card->options.vnicc.learning_timeout);
2280         }
2281
2282         return rc;
2283 }
2284
2285 /* get current VNICC flag state; called from sysfs show function */
2286 int qeth_l2_vnicc_get_state(struct qeth_card *card, u32 vnicc, bool *state)
2287 {
2288         int rc = 0;
2289
2290         QETH_CARD_TEXT(card, 2, "vniccgch");
2291
2292         /* do not get anything if BridgePort is enabled */
2293         if (qeth_bridgeport_is_in_use(card))
2294                 return -EBUSY;
2295
2296         /* check if characteristic is supported */
2297         if (!(card->options.vnicc.sup_chars & vnicc))
2298                 return -EOPNOTSUPP;
2299
2300         /* if card is ready, query current VNICC state */
2301         if (qeth_card_hw_is_reachable(card))
2302                 rc = qeth_l2_vnicc_query_chars(card);
2303
2304         *state = (card->options.vnicc.cur_chars & vnicc) ? true : false;
2305         return rc;
2306 }
2307
2308 /* set VNICC timeout; called from sysfs store function. Currently, only learning
2309  * supports timeout
2310  */
2311 int qeth_l2_vnicc_set_timeout(struct qeth_card *card, u32 timeout)
2312 {
2313         int rc = 0;
2314
2315         QETH_CARD_TEXT(card, 2, "vniccsto");
2316
2317         /* do not change anything if BridgePort is enabled */
2318         if (qeth_bridgeport_is_in_use(card))
2319                 return -EBUSY;
2320
2321         /* check if characteristic and set_timeout are supported */
2322         if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
2323             !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
2324                 return -EOPNOTSUPP;
2325
2326         /* do we need to do anything? */
2327         if (card->options.vnicc.learning_timeout == timeout)
2328                 return rc;
2329
2330         /* if card is not ready, simply store the value internally and return */
2331         if (!qeth_card_hw_is_reachable(card)) {
2332                 card->options.vnicc.learning_timeout = timeout;
2333                 return rc;
2334         }
2335
2336         /* send timeout value to card; if successful, store value internally */
2337         rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
2338                                           IPA_VNICC_SET_TIMEOUT, &timeout);
2339         if (!rc)
2340                 card->options.vnicc.learning_timeout = timeout;
2341
2342         return rc;
2343 }
2344
2345 /* get current VNICC timeout; called from sysfs show function. Currently, only
2346  * learning supports timeout
2347  */
2348 int qeth_l2_vnicc_get_timeout(struct qeth_card *card, u32 *timeout)
2349 {
2350         int rc = 0;
2351
2352         QETH_CARD_TEXT(card, 2, "vniccgto");
2353
2354         /* do not get anything if BridgePort is enabled */
2355         if (qeth_bridgeport_is_in_use(card))
2356                 return -EBUSY;
2357
2358         /* check if characteristic and get_timeout are supported */
2359         if (!(card->options.vnicc.sup_chars & QETH_VNICC_LEARNING) ||
2360             !(card->options.vnicc.getset_timeout_sup & QETH_VNICC_LEARNING))
2361                 return -EOPNOTSUPP;
2362         /* if card is ready, get timeout. Otherwise, just return stored value */
2363         *timeout = card->options.vnicc.learning_timeout;
2364         if (qeth_card_hw_is_reachable(card))
2365                 rc = qeth_l2_vnicc_getset_timeout(card, QETH_VNICC_LEARNING,
2366                                                   IPA_VNICC_GET_TIMEOUT,
2367                                                   timeout);
2368
2369         return rc;
2370 }
2371
2372 /* check if VNICC is currently enabled */
2373 bool qeth_l2_vnicc_is_in_use(struct qeth_card *card)
2374 {
2375         /* if everything is turned off, VNICC is not active */
2376         if (!card->options.vnicc.cur_chars)
2377                 return false;
2378         /* default values are only OK if rx_bcast was not enabled by user
2379          * or the card is offline.
2380          */
2381         if (card->options.vnicc.cur_chars == QETH_VNICC_DEFAULT) {
2382                 if (!card->options.vnicc.rx_bcast_enabled ||
2383                     !qeth_card_hw_is_reachable(card))
2384                         return false;
2385         }
2386         return true;
2387 }
2388
2389 /* recover user timeout setting */
2390 static bool qeth_l2_vnicc_recover_timeout(struct qeth_card *card, u32 vnicc,
2391                                           u32 *timeout)
2392 {
2393         if (card->options.vnicc.sup_chars & vnicc &&
2394             card->options.vnicc.getset_timeout_sup & vnicc &&
2395             !qeth_l2_vnicc_getset_timeout(card, vnicc, IPA_VNICC_SET_TIMEOUT,
2396                                           timeout))
2397                 return false;
2398         *timeout = QETH_VNICC_DEFAULT_TIMEOUT;
2399         return true;
2400 }
2401
2402 /* recover user characteristic setting */
2403 static bool qeth_l2_vnicc_recover_char(struct qeth_card *card, u32 vnicc,
2404                                        bool enable)
2405 {
2406         u32 cmd = enable ? IPA_VNICC_ENABLE : IPA_VNICC_DISABLE;
2407
2408         if (card->options.vnicc.sup_chars & vnicc &&
2409             card->options.vnicc.set_char_sup & vnicc &&
2410             !qeth_l2_vnicc_set_char(card, vnicc, cmd))
2411                 return false;
2412         card->options.vnicc.wanted_chars &= ~vnicc;
2413         card->options.vnicc.wanted_chars |= QETH_VNICC_DEFAULT & vnicc;
2414         return true;
2415 }
2416
2417 /* (re-)initialize VNICC */
2418 static void qeth_l2_vnicc_init(struct qeth_card *card)
2419 {
2420         u32 *timeout = &card->options.vnicc.learning_timeout;
2421         unsigned int chars_len, i;
2422         unsigned long chars_tmp;
2423         u32 sup_cmds, vnicc;
2424         bool enable, error;
2425
2426         QETH_CARD_TEXT(card, 2, "vniccini");
2427         /* reset rx_bcast */
2428         card->options.vnicc.rx_bcast_enabled = 0;
2429         /* initial query and storage of VNIC characteristics */
2430         if (qeth_l2_vnicc_query_chars(card)) {
2431                 if (card->options.vnicc.wanted_chars != QETH_VNICC_DEFAULT ||
2432                     *timeout != QETH_VNICC_DEFAULT_TIMEOUT)
2433                         dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
2434                 /* fail quietly if user didn't change the default config */
2435                 card->options.vnicc.sup_chars = 0;
2436                 card->options.vnicc.cur_chars = 0;
2437                 card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
2438                 return;
2439         }
2440         /* get supported commands for each supported characteristic */
2441         chars_tmp = card->options.vnicc.sup_chars;
2442         chars_len = sizeof(card->options.vnicc.sup_chars) * BITS_PER_BYTE;
2443         for_each_set_bit(i, &chars_tmp, chars_len) {
2444                 vnicc = BIT(i);
2445                 qeth_l2_vnicc_query_cmds(card, vnicc, &sup_cmds);
2446                 if (!(sup_cmds & IPA_VNICC_SET_TIMEOUT) ||
2447                     !(sup_cmds & IPA_VNICC_GET_TIMEOUT))
2448                         card->options.vnicc.getset_timeout_sup &= ~vnicc;
2449                 if (!(sup_cmds & IPA_VNICC_ENABLE) ||
2450                     !(sup_cmds & IPA_VNICC_DISABLE))
2451                         card->options.vnicc.set_char_sup &= ~vnicc;
2452         }
2453         /* enforce assumed default values and recover settings, if changed  */
2454         error = qeth_l2_vnicc_recover_timeout(card, QETH_VNICC_LEARNING,
2455                                               timeout);
2456         chars_tmp = card->options.vnicc.wanted_chars ^ QETH_VNICC_DEFAULT;
2457         chars_tmp |= QETH_VNICC_BRIDGE_INVISIBLE;
2458         chars_len = sizeof(card->options.vnicc.wanted_chars) * BITS_PER_BYTE;
2459         for_each_set_bit(i, &chars_tmp, chars_len) {
2460                 vnicc = BIT(i);
2461                 enable = card->options.vnicc.wanted_chars & vnicc;
2462                 error |= qeth_l2_vnicc_recover_char(card, vnicc, enable);
2463         }
2464         if (error)
2465                 dev_err(&card->gdev->dev, "Configuring the VNIC characteristics failed\n");
2466 }
2467
2468 /* configure default values of VNIC characteristics */
2469 static void qeth_l2_vnicc_set_defaults(struct qeth_card *card)
2470 {
2471         /* characteristics values */
2472         card->options.vnicc.sup_chars = QETH_VNICC_ALL;
2473         card->options.vnicc.cur_chars = QETH_VNICC_DEFAULT;
2474         card->options.vnicc.learning_timeout = QETH_VNICC_DEFAULT_TIMEOUT;
2475         /* supported commands */
2476         card->options.vnicc.set_char_sup = QETH_VNICC_ALL;
2477         card->options.vnicc.getset_timeout_sup = QETH_VNICC_LEARNING;
2478         /* settings wanted by users */
2479         card->options.vnicc.wanted_chars = QETH_VNICC_DEFAULT;
2480 }
2481
2482 module_init(qeth_l2_init);
2483 module_exit(qeth_l2_exit);
2484 MODULE_AUTHOR("Frank Blaschka <[email protected]>");
2485 MODULE_DESCRIPTION("qeth layer 2 discipline");
2486 MODULE_LICENSE("GPL");