drivers/s390/net/qeth_l3_main.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *    Copyright IBM Corp. 2007, 2009
   4  *    Author(s): Utz Bacher <utz.bacher@de.ibm.com>,
   5  *               Frank Pavlic <fpavlic@de.ibm.com>,
   6  *               Thomas Spatzier <tspat@de.ibm.com>,
   7  *               Frank Blaschka <frank.blaschka@de.ibm.com>
   8  */
   9
  10 #define KMSG_COMPONENT "qeth"
  11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
  12
  13 #include <linux/module.h>
  14 #include <linux/moduleparam.h>
  15 #include <linux/bitops.h>
  16 #include <linux/string.h>
  17 #include <linux/errno.h>
  18 #include <linux/kernel.h>
  19 #include <linux/etherdevice.h>
  20 #include <linux/ip.h>
  21 #include <linux/in.h>
  22 #include <linux/ipv6.h>
  23 #include <linux/inetdevice.h>
  24 #include <linux/igmp.h>
  25 #include <linux/slab.h>
  26 #include <linux/if_ether.h>
  27 #include <linux/if_vlan.h>
  28 #include <linux/skbuff.h>
  29
  30 #include <net/ip.h>
  31 #include <net/arp.h>
  32 #include <net/route.h>
  33 #include <net/ipv6.h>
  34 #include <net/ip6_route.h>
  35 #include <net/iucv/af_iucv.h>
  36 #include <linux/hashtable.h>
  37
  38 #include "qeth_l3.h"
  39
  40
  41 static int qeth_l3_set_offline(struct ccwgroup_device *);
  42 static int qeth_l3_register_addr_entry(struct qeth_card *,
  43                 struct qeth_ipaddr *);
  44 static int qeth_l3_deregister_addr_entry(struct qeth_card *,
  45                 struct qeth_ipaddr *);
  46
  47 static void qeth_l3_ipaddr4_to_string(const __u8 *addr, char *buf)
  48 {
  49         sprintf(buf, "%pI4", addr);
  50 }
  51
  52 static void qeth_l3_ipaddr6_to_string(const __u8 *addr, char *buf)
  53 {
  54         sprintf(buf, "%pI6", addr);
  55 }
  56
  57 void qeth_l3_ipaddr_to_string(enum qeth_prot_versions proto, const __u8 *addr,
  58                                 char *buf)
  59 {
  60         if (proto == QETH_PROT_IPV4)
  61                 qeth_l3_ipaddr4_to_string(addr, buf);
  62         else if (proto == QETH_PROT_IPV6)
  63                 qeth_l3_ipaddr6_to_string(addr, buf);
  64 }
  65
  66 static struct qeth_ipaddr *qeth_l3_get_addr_buffer(enum qeth_prot_versions prot)
  67 {
  68         struct qeth_ipaddr *addr = kmalloc(sizeof(*addr), GFP_ATOMIC);
  69
  70         if (addr)
  71                 qeth_l3_init_ipaddr(addr, QETH_IP_TYPE_NORMAL, prot);
  72         return addr;
  73 }
  74
  75 static struct qeth_ipaddr *qeth_l3_find_addr_by_ip(struct qeth_card *card,
  76                                                    struct qeth_ipaddr *query)
  77 {
  78         u32 key = qeth_l3_ipaddr_hash(query);
  79         struct qeth_ipaddr *addr;
  80
  81         if (query->is_multicast) {
  82                 hash_for_each_possible(card->ip_mc_htable, addr, hnode, key)
  83                         if (qeth_l3_addr_match_ip(addr, query))
  84                                 return addr;
  85         } else {
  86                 hash_for_each_possible(card->ip_htable,  addr, hnode, key)
  87                         if (qeth_l3_addr_match_ip(addr, query))
  88                                 return addr;
  89         }
  90         return NULL;
  91 }
  92
  93 static void qeth_l3_convert_addr_to_bits(u8 *addr, u8 *bits, int len)
  94 {
  95         int i, j;
  96         u8 octet;
  97
  98         for (i = 0; i < len; ++i) {
  99                 octet = addr[i];
 100                 for (j = 7; j >= 0; --j) {
 101                         bits[i*8 + j] = octet & 1;
 102                         octet >>= 1;
 103                 }
 104         }
 105 }
 106
 107 static bool qeth_l3_is_addr_covered_by_ipato(struct qeth_card *card,
 108                                              struct qeth_ipaddr *addr)
 109 {
 110         struct qeth_ipato_entry *ipatoe;
 111         u8 addr_bits[128] = {0, };
 112         u8 ipatoe_bits[128] = {0, };
 113         int rc = 0;
 114
 115         if (!card->ipato.enabled)
 116                 return false;
 117         if (addr->type != QETH_IP_TYPE_NORMAL)
 118                 return false;
 119
 120         qeth_l3_convert_addr_to_bits((u8 *) &addr->u, addr_bits,
 121                                   (addr->proto == QETH_PROT_IPV4)? 4:16);
 122         list_for_each_entry(ipatoe, &card->ipato.entries, entry) {
 123                 if (addr->proto != ipatoe->proto)
 124                         continue;
 125                 qeth_l3_convert_addr_to_bits(ipatoe->addr, ipatoe_bits,
 126                                           (ipatoe->proto == QETH_PROT_IPV4) ?
 127                                           4 : 16);
 128                 if (addr->proto == QETH_PROT_IPV4)
 129                         rc = !memcmp(addr_bits, ipatoe_bits,
 130                                      min(32, ipatoe->mask_bits));
 131                 else
 132                         rc = !memcmp(addr_bits, ipatoe_bits,
 133                                      min(128, ipatoe->mask_bits));
 134                 if (rc)
 135                         break;
 136         }
 137         /* invert? */
 138         if ((addr->proto == QETH_PROT_IPV4) && card->ipato.invert4)
 139                 rc = !rc;
 140         else if ((addr->proto == QETH_PROT_IPV6) && card->ipato.invert6)
 141                 rc = !rc;
 142
 143         return rc;
 144 }
 145
 146 static int qeth_l3_delete_ip(struct qeth_card *card,
 147                              struct qeth_ipaddr *tmp_addr)
 148 {
 149         int rc = 0;
 150         struct qeth_ipaddr *addr;
 151
 152         if (tmp_addr->type == QETH_IP_TYPE_RXIP)
 153                 QETH_CARD_TEXT(card, 2, "delrxip");
 154         else if (tmp_addr->type == QETH_IP_TYPE_VIPA)
 155                 QETH_CARD_TEXT(card, 2, "delvipa");
 156         else
 157                 QETH_CARD_TEXT(card, 2, "delip");
 158
 159         if (tmp_addr->proto == QETH_PROT_IPV4)
 160                 QETH_CARD_HEX(card, 4, &tmp_addr->u.a4.addr, 4);
 161         else {
 162                 QETH_CARD_HEX(card, 4, &tmp_addr->u.a6.addr, 8);
 163                 QETH_CARD_HEX(card, 4, ((char *)&tmp_addr->u.a6.addr) + 8, 8);
 164         }
 165
 166         addr = qeth_l3_find_addr_by_ip(card, tmp_addr);
 167         if (!addr || !qeth_l3_addr_match_all(addr, tmp_addr))
 168                 return -ENOENT;
 169
 170         addr->ref_counter--;
 171         if (addr->type == QETH_IP_TYPE_NORMAL && addr->ref_counter > 0)
 172                 return rc;
 173         if (addr->in_progress)
 174                 return -EINPROGRESS;
 175
 176         if (qeth_card_hw_is_reachable(card))
 177                 rc = qeth_l3_deregister_addr_entry(card, addr);
 178
 179         hash_del(&addr->hnode);
 180         kfree(addr);
 181
 182         return rc;
 183 }
 184
 185 static int qeth_l3_add_ip(struct qeth_card *card, struct qeth_ipaddr *tmp_addr)
 186 {
 187         int rc = 0;
 188         struct qeth_ipaddr *addr;
 189         char buf[40];
 190
 191         if (tmp_addr->type == QETH_IP_TYPE_RXIP)
 192                 QETH_CARD_TEXT(card, 2, "addrxip");
 193         else if (tmp_addr->type == QETH_IP_TYPE_VIPA)
 194                 QETH_CARD_TEXT(card, 2, "addvipa");
 195         else
 196                 QETH_CARD_TEXT(card, 2, "addip");
 197
 198         if (tmp_addr->proto == QETH_PROT_IPV4)
 199                 QETH_CARD_HEX(card, 4, &tmp_addr->u.a4.addr, 4);
 200         else {
 201                 QETH_CARD_HEX(card, 4, &tmp_addr->u.a6.addr, 8);
 202                 QETH_CARD_HEX(card, 4, ((char *)&tmp_addr->u.a6.addr) + 8, 8);
 203         }
 204
 205         addr = qeth_l3_find_addr_by_ip(card, tmp_addr);
 206         if (addr) {
 207                 if (tmp_addr->type != QETH_IP_TYPE_NORMAL)
 208                         return -EADDRINUSE;
 209                 if (qeth_l3_addr_match_all(addr, tmp_addr)) {
 210                         addr->ref_counter++;
 211                         return 0;
 212                 }
 213                 qeth_l3_ipaddr_to_string(tmp_addr->proto, (u8 *)&tmp_addr->u,
 214                                          buf);
 215                 dev_warn(&card->gdev->dev,
 216                          "Registering IP address %s failed\n", buf);
 217                 return -EADDRINUSE;
 218         } else {
 219                 addr = qeth_l3_get_addr_buffer(tmp_addr->proto);
 220                 if (!addr)
 221                         return -ENOMEM;
 222
 223                 memcpy(addr, tmp_addr, sizeof(struct qeth_ipaddr));
 224                 addr->ref_counter = 1;
 225
 226                 if (qeth_l3_is_addr_covered_by_ipato(card, addr)) {
 227                         QETH_CARD_TEXT(card, 2, "tkovaddr");
 228                         addr->ipato = 1;
 229                 }
 230                 hash_add(card->ip_htable, &addr->hnode,
 231                                 qeth_l3_ipaddr_hash(addr));
 232
 233                 if (!qeth_card_hw_is_reachable(card)) {
 234                         addr->disp_flag = QETH_DISP_ADDR_ADD;
 235                         return 0;
 236                 }
 237
 238                 /* qeth_l3_register_addr_entry can go to sleep
 239                  * if we add a IPV4 addr. It is caused by the reason
 240                  * that SETIP ipa cmd starts ARP staff for IPV4 addr.
 241                  * Thus we should unlock spinlock, and make a protection
 242                  * using in_progress variable to indicate that there is
 243                  * an hardware operation with this IPV4 address
 244                  */
 245                 if (addr->proto == QETH_PROT_IPV4) {
 246                         addr->in_progress = 1;
 247                         mutex_unlock(&card->ip_lock);
 248                         rc = qeth_l3_register_addr_entry(card, addr);
 249                         mutex_lock(&card->ip_lock);
 250                         addr->in_progress = 0;
 251                 } else
 252                         rc = qeth_l3_register_addr_entry(card, addr);
 253
 254                 if (!rc || rc == -EADDRINUSE || rc == -ENETDOWN) {
 255                         addr->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
 256                         if (addr->ref_counter < 1) {
 257                                 qeth_l3_deregister_addr_entry(card, addr);
 258                                 hash_del(&addr->hnode);
 259                                 kfree(addr);
 260                         }
 261                 } else {
 262                         hash_del(&addr->hnode);
 263                         kfree(addr);
 264                 }
 265         }
 266         return rc;
 267 }
 268
 269 static int qeth_l3_modify_ip(struct qeth_card *card, struct qeth_ipaddr *addr,
 270                              bool add)
 271 {
 272         int rc;
 273
 274         mutex_lock(&card->ip_lock);
 275         rc = add ? qeth_l3_add_ip(card, addr) : qeth_l3_delete_ip(card, addr);
 276         mutex_unlock(&card->ip_lock);
 277
 278         return rc;
 279 }
 280
 281 static void qeth_l3_drain_rx_mode_cache(struct qeth_card *card)
 282 {
 283         struct qeth_ipaddr *addr;
 284         struct hlist_node *tmp;
 285         int i;
 286
 287         hash_for_each_safe(card->ip_mc_htable, i, tmp, addr, hnode) {
 288                 hash_del(&addr->hnode);
 289                 kfree(addr);
 290         }
 291 }
 292
 293 static void qeth_l3_clear_ip_htable(struct qeth_card *card, int recover)
 294 {
 295         struct qeth_ipaddr *addr;
 296         struct hlist_node *tmp;
 297         int i;
 298
 299         QETH_CARD_TEXT(card, 4, "clearip");
 300
 301         mutex_lock(&card->ip_lock);
 302
 303         hash_for_each_safe(card->ip_htable, i, tmp, addr, hnode) {
 304                 if (!recover) {
 305                         hash_del(&addr->hnode);
 306                         kfree(addr);
 307                         continue;
 308                 }
 309                 addr->disp_flag = QETH_DISP_ADDR_ADD;
 310         }
 311
 312         mutex_unlock(&card->ip_lock);
 313 }
 314
 315 static void qeth_l3_recover_ip(struct qeth_card *card)
 316 {
 317         struct qeth_ipaddr *addr;
 318         struct hlist_node *tmp;
 319         int i;
 320         int rc;
 321
 322         QETH_CARD_TEXT(card, 4, "recovrip");
 323
 324         mutex_lock(&card->ip_lock);
 325
 326         hash_for_each_safe(card->ip_htable, i, tmp, addr, hnode) {
 327                 if (addr->disp_flag == QETH_DISP_ADDR_ADD) {
 328                         if (addr->proto == QETH_PROT_IPV4) {
 329                                 addr->in_progress = 1;
 330                                 mutex_unlock(&card->ip_lock);
 331                                 rc = qeth_l3_register_addr_entry(card, addr);
 332                                 mutex_lock(&card->ip_lock);
 333                                 addr->in_progress = 0;
 334                         } else
 335                                 rc = qeth_l3_register_addr_entry(card, addr);
 336
 337                         if (!rc) {
 338                                 addr->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
 339                                 if (addr->ref_counter < 1)
 340                                         qeth_l3_delete_ip(card, addr);
 341                         } else {
 342                                 hash_del(&addr->hnode);
 343                                 kfree(addr);
 344                         }
 345                 }
 346         }
 347
 348         mutex_unlock(&card->ip_lock);
 349 }
 350
 351 static int qeth_l3_setdelip_cb(struct qeth_card *card, struct qeth_reply *reply,
 352                                unsigned long data)
 353 {
 354         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
 355
 356         switch (cmd->hdr.return_code) {
 357         case IPA_RC_SUCCESS:
 358                 return 0;
 359         case IPA_RC_DUPLICATE_IP_ADDRESS:
 360                 return -EADDRINUSE;
 361         case IPA_RC_MC_ADDR_NOT_FOUND:
 362                 return -ENOENT;
 363         case IPA_RC_LAN_OFFLINE:
 364                 return -ENETDOWN;
 365         default:
 366                 return -EIO;
 367         }
 368 }
 369
 370 static int qeth_l3_send_setdelmc(struct qeth_card *card,
 371                         struct qeth_ipaddr *addr, int ipacmd)
 372 {
 373         struct qeth_cmd_buffer *iob;
 374         struct qeth_ipa_cmd *cmd;
 375
 376         QETH_CARD_TEXT(card, 4, "setdelmc");
 377
 378         iob = qeth_ipa_alloc_cmd(card, ipacmd, addr->proto,
 379                                  IPA_DATA_SIZEOF(setdelipm));
 380         if (!iob)
 381                 return -ENOMEM;
 382         cmd = __ipa_cmd(iob);
 383         if (addr->proto == QETH_PROT_IPV6) {
 384                 cmd->data.setdelipm.ip = addr->u.a6.addr;
 385                 ipv6_eth_mc_map(&addr->u.a6.addr, cmd->data.setdelipm.mac);
 386         } else {
 387                 cmd->data.setdelipm.ip.s6_addr32[3] = addr->u.a4.addr;
 388                 ip_eth_mc_map(addr->u.a4.addr, cmd->data.setdelipm.mac);
 389         }
 390
 391         return qeth_send_ipa_cmd(card, iob, qeth_l3_setdelip_cb, NULL);
 392 }
 393
 394 static void qeth_l3_fill_netmask(u8 *netmask, unsigned int len)
 395 {
 396         int i, j;
 397         for (i = 0; i < 16; i++) {
 398                 j = (len) - (i * 8);
 399                 if (j >= 8)
 400                         netmask[i] = 0xff;
 401                 else if (j > 0)
 402                         netmask[i] = (u8)(0xFF00 >> j);
 403                 else
 404                         netmask[i] = 0;
 405         }
 406 }
 407
 408 static u32 qeth_l3_get_setdelip_flags(struct qeth_ipaddr *addr, bool set)
 409 {
 410         switch (addr->type) {
 411         case QETH_IP_TYPE_RXIP:
 412                 return (set) ? QETH_IPA_SETIP_TAKEOVER_FLAG : 0;
 413         case QETH_IP_TYPE_VIPA:
 414                 return (set) ? QETH_IPA_SETIP_VIPA_FLAG :
 415                                QETH_IPA_DELIP_VIPA_FLAG;
 416         default:
 417                 return (set && addr->ipato) ? QETH_IPA_SETIP_TAKEOVER_FLAG : 0;
 418         }
 419 }
 420
 421 static int qeth_l3_send_setdelip(struct qeth_card *card,
 422                                  struct qeth_ipaddr *addr,
 423                                  enum qeth_ipa_cmds ipacmd)
 424 {
 425         struct qeth_cmd_buffer *iob;
 426         struct qeth_ipa_cmd *cmd;
 427         __u8 netmask[16];
 428         u32 flags;
 429
 430         QETH_CARD_TEXT(card, 4, "setdelip");
 431
 432         iob = qeth_ipa_alloc_cmd(card, ipacmd, addr->proto,
 433                                  IPA_DATA_SIZEOF(setdelip6));
 434         if (!iob)
 435                 return -ENOMEM;
 436         cmd = __ipa_cmd(iob);
 437
 438         flags = qeth_l3_get_setdelip_flags(addr, ipacmd == IPA_CMD_SETIP);
 439         QETH_CARD_TEXT_(card, 4, "flags%02X", flags);
 440
 441         if (addr->proto == QETH_PROT_IPV6) {
 442                 memcpy(cmd->data.setdelip6.ip_addr, &addr->u.a6.addr,
 443                        sizeof(struct in6_addr));
 444                 qeth_l3_fill_netmask(netmask, addr->u.a6.pfxlen);
 445                 memcpy(cmd->data.setdelip6.mask, netmask,
 446                        sizeof(struct in6_addr));
 447                 cmd->data.setdelip6.flags = flags;
 448         } else {
 449                 memcpy(cmd->data.setdelip4.ip_addr, &addr->u.a4.addr, 4);
 450                 memcpy(cmd->data.setdelip4.mask, &addr->u.a4.mask, 4);
 451                 cmd->data.setdelip4.flags = flags;
 452         }
 453
 454         return qeth_send_ipa_cmd(card, iob, qeth_l3_setdelip_cb, NULL);
 455 }
 456
 457 static int qeth_l3_send_setrouting(struct qeth_card *card,
 458         enum qeth_routing_types type, enum qeth_prot_versions prot)
 459 {
 460         int rc;
 461         struct qeth_ipa_cmd *cmd;
 462         struct qeth_cmd_buffer *iob;
 463
 464         QETH_CARD_TEXT(card, 4, "setroutg");
 465         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETRTG, prot,
 466                                  IPA_DATA_SIZEOF(setrtg));
 467         if (!iob)
 468                 return -ENOMEM;
 469         cmd = __ipa_cmd(iob);
 470         cmd->data.setrtg.type = (type);
 471         rc = qeth_send_ipa_cmd(card, iob, NULL, NULL);
 472
 473         return rc;
 474 }
 475
 476 static int qeth_l3_correct_routing_type(struct qeth_card *card,
 477                 enum qeth_routing_types *type, enum qeth_prot_versions prot)
 478 {
 479         if (IS_IQD(card)) {
 480                 switch (*type) {
 481                 case NO_ROUTER:
 482                 case PRIMARY_CONNECTOR:
 483                 case SECONDARY_CONNECTOR:
 484                 case MULTICAST_ROUTER:
 485                         return 0;
 486                 default:
 487                         goto out_inval;
 488                 }
 489         } else {
 490                 switch (*type) {
 491                 case NO_ROUTER:
 492                 case PRIMARY_ROUTER:
 493                 case SECONDARY_ROUTER:
 494                         return 0;
 495                 case MULTICAST_ROUTER:
 496                         if (qeth_is_ipafunc_supported(card, prot,
 497                                                       IPA_OSA_MC_ROUTER))
 498                                 return 0;
 499                 default:
 500                         goto out_inval;
 501                 }
 502         }
 503 out_inval:
 504         *type = NO_ROUTER;
 505         return -EINVAL;
 506 }
 507
 508 int qeth_l3_setrouting_v4(struct qeth_card *card)
 509 {
 510         int rc;
 511
 512         QETH_CARD_TEXT(card, 3, "setrtg4");
 513
 514         rc = qeth_l3_correct_routing_type(card, &card->options.route4.type,
 515                                   QETH_PROT_IPV4);
 516         if (rc)
 517                 return rc;
 518
 519         rc = qeth_l3_send_setrouting(card, card->options.route4.type,
 520                                   QETH_PROT_IPV4);
 521         if (rc) {
 522                 card->options.route4.type = NO_ROUTER;
 523                 QETH_DBF_MESSAGE(2, "Error (%#06x) while setting routing type on device %x. Type set to 'no router'.\n",
 524                                  rc, CARD_DEVID(card));
 525         }
 526         return rc;
 527 }
 528
 529 int qeth_l3_setrouting_v6(struct qeth_card *card)
 530 {
 531         int rc = 0;
 532
 533         QETH_CARD_TEXT(card, 3, "setrtg6");
 534
 535         if (!qeth_is_supported(card, IPA_IPV6))
 536                 return 0;
 537         rc = qeth_l3_correct_routing_type(card, &card->options.route6.type,
 538                                   QETH_PROT_IPV6);
 539         if (rc)
 540                 return rc;
 541
 542         rc = qeth_l3_send_setrouting(card, card->options.route6.type,
 543                                   QETH_PROT_IPV6);
 544         if (rc) {
 545                 card->options.route6.type = NO_ROUTER;
 546                 QETH_DBF_MESSAGE(2, "Error (%#06x) while setting routing type on device %x. Type set to 'no router'.\n",
 547                                  rc, CARD_DEVID(card));
 548         }
 549         return rc;
 550 }
 551
 552 /*
 553  * IP address takeover related functions
 554  */
 555
 556 /**
 557  * qeth_l3_update_ipato() - Update 'takeover' property, for all NORMAL IPs.
 558  *
 559  * Caller must hold ip_lock.
 560  */
 561 void qeth_l3_update_ipato(struct qeth_card *card)
 562 {
 563         struct qeth_ipaddr *addr;
 564         unsigned int i;
 565
 566         hash_for_each(card->ip_htable, i, addr, hnode) {
 567                 if (addr->type != QETH_IP_TYPE_NORMAL)
 568                         continue;
 569                 addr->ipato = qeth_l3_is_addr_covered_by_ipato(card, addr);
 570         }
 571 }
 572
 573 static void qeth_l3_clear_ipato_list(struct qeth_card *card)
 574 {
 575         struct qeth_ipato_entry *ipatoe, *tmp;
 576
 577         mutex_lock(&card->ip_lock);
 578
 579         list_for_each_entry_safe(ipatoe, tmp, &card->ipato.entries, entry) {
 580                 list_del(&ipatoe->entry);
 581                 kfree(ipatoe);
 582         }
 583
 584         qeth_l3_update_ipato(card);
 585         mutex_unlock(&card->ip_lock);
 586 }
 587
 588 int qeth_l3_add_ipato_entry(struct qeth_card *card,
 589                                 struct qeth_ipato_entry *new)
 590 {
 591         struct qeth_ipato_entry *ipatoe;
 592         int rc = 0;
 593
 594         QETH_CARD_TEXT(card, 2, "addipato");
 595
 596         mutex_lock(&card->ip_lock);
 597
 598         list_for_each_entry(ipatoe, &card->ipato.entries, entry) {
 599                 if (ipatoe->proto != new->proto)
 600                         continue;
 601                 if (!memcmp(ipatoe->addr, new->addr,
 602                             (ipatoe->proto == QETH_PROT_IPV4)? 4:16) &&
 603                     (ipatoe->mask_bits == new->mask_bits)) {
 604                         rc = -EEXIST;
 605                         break;
 606                 }
 607         }
 608
 609         if (!rc) {
 610                 list_add_tail(&new->entry, &card->ipato.entries);
 611                 qeth_l3_update_ipato(card);
 612         }
 613
 614         mutex_unlock(&card->ip_lock);
 615
 616         return rc;
 617 }
 618
 619 int qeth_l3_del_ipato_entry(struct qeth_card *card,
 620                             enum qeth_prot_versions proto, u8 *addr,
 621                             int mask_bits)
 622 {
 623         struct qeth_ipato_entry *ipatoe, *tmp;
 624         int rc = -ENOENT;
 625
 626         QETH_CARD_TEXT(card, 2, "delipato");
 627
 628         mutex_lock(&card->ip_lock);
 629
 630         list_for_each_entry_safe(ipatoe, tmp, &card->ipato.entries, entry) {
 631                 if (ipatoe->proto != proto)
 632                         continue;
 633                 if (!memcmp(ipatoe->addr, addr,
 634                             (proto == QETH_PROT_IPV4)? 4:16) &&
 635                     (ipatoe->mask_bits == mask_bits)) {
 636                         list_del(&ipatoe->entry);
 637                         qeth_l3_update_ipato(card);
 638                         kfree(ipatoe);
 639                         rc = 0;
 640                 }
 641         }
 642
 643         mutex_unlock(&card->ip_lock);
 644         return rc;
 645 }
 646
 647 int qeth_l3_modify_rxip_vipa(struct qeth_card *card, bool add, const u8 *ip,
 648                              enum qeth_ip_types type,
 649                              enum qeth_prot_versions proto)
 650 {
 651         struct qeth_ipaddr addr;
 652
 653         qeth_l3_init_ipaddr(&addr, type, proto);
 654         if (proto == QETH_PROT_IPV4)
 655                 memcpy(&addr.u.a4.addr, ip, 4);
 656         else
 657                 memcpy(&addr.u.a6.addr, ip, 16);
 658
 659         return qeth_l3_modify_ip(card, &addr, add);
 660 }
 661
 662 int qeth_l3_modify_hsuid(struct qeth_card *card, bool add)
 663 {
 664         struct qeth_ipaddr addr;
 665         unsigned int i;
 666
 667         qeth_l3_init_ipaddr(&addr, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV6);
 668         addr.u.a6.addr.s6_addr[0] = 0xfe;
 669         addr.u.a6.addr.s6_addr[1] = 0x80;
 670         for (i = 0; i < 8; i++)
 671                 addr.u.a6.addr.s6_addr[8+i] = card->options.hsuid[i];
 672
 673         return qeth_l3_modify_ip(card, &addr, add);
 674 }
 675
 676 static int qeth_l3_register_addr_entry(struct qeth_card *card,
 677                                 struct qeth_ipaddr *addr)
 678 {
 679         char buf[50];
 680         int rc = 0;
 681         int cnt = 3;
 682
 683         if (card->options.sniffer)
 684                 return 0;
 685
 686         if (addr->proto == QETH_PROT_IPV4) {
 687                 QETH_CARD_TEXT(card, 2, "setaddr4");
 688                 QETH_CARD_HEX(card, 3, &addr->u.a4.addr, sizeof(int));
 689         } else if (addr->proto == QETH_PROT_IPV6) {
 690                 QETH_CARD_TEXT(card, 2, "setaddr6");
 691                 QETH_CARD_HEX(card, 3, &addr->u.a6.addr, 8);
 692                 QETH_CARD_HEX(card, 3, ((char *)&addr->u.a6.addr) + 8, 8);
 693         } else {
 694                 QETH_CARD_TEXT(card, 2, "setaddr?");
 695                 QETH_CARD_HEX(card, 3, addr, sizeof(struct qeth_ipaddr));
 696         }
 697         do {
 698                 if (addr->is_multicast)
 699                         rc =  qeth_l3_send_setdelmc(card, addr, IPA_CMD_SETIPM);
 700                 else
 701                         rc = qeth_l3_send_setdelip(card, addr, IPA_CMD_SETIP);
 702                 if (rc)
 703                         QETH_CARD_TEXT(card, 2, "failed");
 704         } while ((--cnt > 0) && rc);
 705         if (rc) {
 706                 QETH_CARD_TEXT(card, 2, "FAILED");
 707                 qeth_l3_ipaddr_to_string(addr->proto, (u8 *)&addr->u, buf);
 708                 dev_warn(&card->gdev->dev,
 709                         "Registering IP address %s failed\n", buf);
 710         }
 711         return rc;
 712 }
 713
 714 static int qeth_l3_deregister_addr_entry(struct qeth_card *card,
 715                                                 struct qeth_ipaddr *addr)
 716 {
 717         int rc = 0;
 718
 719         if (card->options.sniffer)
 720                 return 0;
 721
 722         if (addr->proto == QETH_PROT_IPV4) {
 723                 QETH_CARD_TEXT(card, 2, "deladdr4");
 724                 QETH_CARD_HEX(card, 3, &addr->u.a4.addr, sizeof(int));
 725         } else if (addr->proto == QETH_PROT_IPV6) {
 726                 QETH_CARD_TEXT(card, 2, "deladdr6");
 727                 QETH_CARD_HEX(card, 3, &addr->u.a6.addr, 8);
 728                 QETH_CARD_HEX(card, 3, ((char *)&addr->u.a6.addr) + 8, 8);
 729         } else {
 730                 QETH_CARD_TEXT(card, 2, "deladdr?");
 731                 QETH_CARD_HEX(card, 3, addr, sizeof(struct qeth_ipaddr));
 732         }
 733         if (addr->is_multicast)
 734                 rc = qeth_l3_send_setdelmc(card, addr, IPA_CMD_DELIPM);
 735         else
 736                 rc = qeth_l3_send_setdelip(card, addr, IPA_CMD_DELIP);
 737         if (rc)
 738                 QETH_CARD_TEXT(card, 2, "failed");
 739
 740         return rc;
 741 }
 742
 743 static int qeth_l3_setadapter_parms(struct qeth_card *card)
 744 {
 745         int rc = 0;
 746
 747         QETH_CARD_TEXT(card, 2, "setadprm");
 748
 749         if (qeth_adp_supported(card, IPA_SETADP_ALTER_MAC_ADDRESS)) {
 750                 rc = qeth_setadpparms_change_macaddr(card);
 751                 if (rc)
 752                         dev_warn(&card->gdev->dev, "Reading the adapter MAC"
 753                                 " address failed\n");
 754         }
 755
 756         return rc;
 757 }
 758
 759 static int qeth_l3_start_ipa_arp_processing(struct qeth_card *card)
 760 {
 761         int rc;
 762
 763         QETH_CARD_TEXT(card, 3, "ipaarp");
 764
 765         if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
 766                 dev_info(&card->gdev->dev,
 767                         "ARP processing not supported on %s!\n",
 768                         QETH_CARD_IFNAME(card));
 769                 return 0;
 770         }
 771         rc = qeth_send_simple_setassparms(card, IPA_ARP_PROCESSING,
 772                                           IPA_CMD_ASS_START, NULL);
 773         if (rc) {
 774                 dev_warn(&card->gdev->dev,
 775                         "Starting ARP processing support for %s failed\n",
 776                         QETH_CARD_IFNAME(card));
 777         }
 778         return rc;
 779 }
 780
 781 static int qeth_l3_start_ipa_source_mac(struct qeth_card *card)
 782 {
 783         int rc;
 784
 785         QETH_CARD_TEXT(card, 3, "stsrcmac");
 786
 787         if (!qeth_is_supported(card, IPA_SOURCE_MAC)) {
 788                 dev_info(&card->gdev->dev,
 789                         "Inbound source MAC-address not supported on %s\n",
 790                         QETH_CARD_IFNAME(card));
 791                 return -EOPNOTSUPP;
 792         }
 793
 794         rc = qeth_send_simple_setassparms(card, IPA_SOURCE_MAC,
 795                                           IPA_CMD_ASS_START, NULL);
 796         if (rc)
 797                 dev_warn(&card->gdev->dev,
 798                         "Starting source MAC-address support for %s failed\n",
 799                         QETH_CARD_IFNAME(card));
 800         return rc;
 801 }
 802
 803 static int qeth_l3_start_ipa_vlan(struct qeth_card *card)
 804 {
 805         int rc = 0;
 806
 807         QETH_CARD_TEXT(card, 3, "strtvlan");
 808
 809         if (!qeth_is_supported(card, IPA_FULL_VLAN)) {
 810                 dev_info(&card->gdev->dev,
 811                         "VLAN not supported on %s\n", QETH_CARD_IFNAME(card));
 812                 return -EOPNOTSUPP;
 813         }
 814
 815         rc = qeth_send_simple_setassparms(card, IPA_VLAN_PRIO,
 816                                           IPA_CMD_ASS_START, NULL);
 817         if (rc) {
 818                 dev_warn(&card->gdev->dev,
 819                         "Starting VLAN support for %s failed\n",
 820                         QETH_CARD_IFNAME(card));
 821         } else {
 822                 dev_info(&card->gdev->dev, "VLAN enabled\n");
 823         }
 824         return rc;
 825 }
 826
 827 static int qeth_l3_start_ipa_multicast(struct qeth_card *card)
 828 {
 829         int rc;
 830
 831         QETH_CARD_TEXT(card, 3, "stmcast");
 832
 833         if (!qeth_is_supported(card, IPA_MULTICASTING)) {
 834                 dev_info(&card->gdev->dev,
 835                         "Multicast not supported on %s\n",
 836                         QETH_CARD_IFNAME(card));
 837                 return -EOPNOTSUPP;
 838         }
 839
 840         rc = qeth_send_simple_setassparms(card, IPA_MULTICASTING,
 841                                           IPA_CMD_ASS_START, NULL);
 842         if (rc) {
 843                 dev_warn(&card->gdev->dev,
 844                         "Starting multicast support for %s failed\n",
 845                         QETH_CARD_IFNAME(card));
 846         } else {
 847                 dev_info(&card->gdev->dev, "Multicast enabled\n");
 848                 card->dev->flags |= IFF_MULTICAST;
 849         }
 850         return rc;
 851 }
 852
 853 static int qeth_l3_softsetup_ipv6(struct qeth_card *card)
 854 {
 855         u32 ipv6_data = 3;
 856         int rc;
 857
 858         QETH_CARD_TEXT(card, 3, "softipv6");
 859
 860         if (IS_IQD(card))
 861                 goto out;
 862
 863         rc = qeth_send_simple_setassparms(card, IPA_IPV6, IPA_CMD_ASS_START,
 864                                           &ipv6_data);
 865         if (rc) {
 866                 dev_err(&card->gdev->dev,
 867                         "Activating IPv6 support for %s failed\n",
 868                         QETH_CARD_IFNAME(card));
 869                 return rc;
 870         }
 871         rc = qeth_send_simple_setassparms_v6(card, IPA_IPV6, IPA_CMD_ASS_START,
 872                                              NULL);
 873         if (rc) {
 874                 dev_err(&card->gdev->dev,
 875                         "Activating IPv6 support for %s failed\n",
 876                          QETH_CARD_IFNAME(card));
 877                 return rc;
 878         }
 879         rc = qeth_send_simple_setassparms_v6(card, IPA_PASSTHRU,
 880                                              IPA_CMD_ASS_START, NULL);
 881         if (rc) {
 882                 dev_warn(&card->gdev->dev,
 883                         "Enabling the passthrough mode for %s failed\n",
 884                         QETH_CARD_IFNAME(card));
 885                 return rc;
 886         }
 887 out:
 888         dev_info(&card->gdev->dev, "IPV6 enabled\n");
 889         return 0;
 890 }
 891
 892 static int qeth_l3_start_ipa_ipv6(struct qeth_card *card)
 893 {
 894         QETH_CARD_TEXT(card, 3, "strtipv6");
 895
 896         if (!qeth_is_supported(card, IPA_IPV6)) {
 897                 dev_info(&card->gdev->dev,
 898                         "IPv6 not supported on %s\n", QETH_CARD_IFNAME(card));
 899                 return 0;
 900         }
 901         return qeth_l3_softsetup_ipv6(card);
 902 }
 903
 904 static int qeth_l3_start_ipa_broadcast(struct qeth_card *card)
 905 {
 906         u32 filter_data = 1;
 907         int rc;
 908
 909         QETH_CARD_TEXT(card, 3, "stbrdcst");
 910         card->info.broadcast_capable = 0;
 911         if (!qeth_is_supported(card, IPA_FILTERING)) {
 912                 dev_info(&card->gdev->dev,
 913                         "Broadcast not supported on %s\n",
 914                         QETH_CARD_IFNAME(card));
 915                 rc = -EOPNOTSUPP;
 916                 goto out;
 917         }
 918         rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
 919                                           IPA_CMD_ASS_START, NULL);
 920         if (rc) {
 921                 dev_warn(&card->gdev->dev, "Enabling broadcast filtering for "
 922                         "%s failed\n", QETH_CARD_IFNAME(card));
 923                 goto out;
 924         }
 925
 926         rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
 927                                           IPA_CMD_ASS_CONFIGURE, &filter_data);
 928         if (rc) {
 929                 dev_warn(&card->gdev->dev,
 930                         "Setting up broadcast filtering for %s failed\n",
 931                         QETH_CARD_IFNAME(card));
 932                 goto out;
 933         }
 934         card->info.broadcast_capable = QETH_BROADCAST_WITH_ECHO;
 935         dev_info(&card->gdev->dev, "Broadcast enabled\n");
 936         rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
 937                                           IPA_CMD_ASS_ENABLE, &filter_data);
 938         if (rc) {
 939                 dev_warn(&card->gdev->dev, "Setting up broadcast echo "
 940                         "filtering for %s failed\n", QETH_CARD_IFNAME(card));
 941                 goto out;
 942         }
 943         card->info.broadcast_capable = QETH_BROADCAST_WITHOUT_ECHO;
 944 out:
 945         if (card->info.broadcast_capable)
 946                 card->dev->flags |= IFF_BROADCAST;
 947         else
 948                 card->dev->flags &= ~IFF_BROADCAST;
 949         return rc;
 950 }
 951
 952 static int qeth_l3_start_ipassists(struct qeth_card *card)
 953 {
 954         QETH_CARD_TEXT(card, 3, "strtipas");
 955
 956         qeth_l3_start_ipa_arp_processing(card); /* go on*/
 957         qeth_l3_start_ipa_source_mac(card);     /* go on*/
 958         qeth_l3_start_ipa_vlan(card);           /* go on*/
 959         qeth_l3_start_ipa_multicast(card);              /* go on*/
 960         qeth_l3_start_ipa_ipv6(card);           /* go on*/
 961         qeth_l3_start_ipa_broadcast(card);              /* go on*/
 962         return 0;
 963 }
 964
 965 static int qeth_l3_iqd_read_initial_mac_cb(struct qeth_card *card,
 966                 struct qeth_reply *reply, unsigned long data)
 967 {
 968         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
 969
 970         if (cmd->hdr.return_code)
 971                 return -EIO;
 972
 973         ether_addr_copy(card->dev->dev_addr,
 974                         cmd->data.create_destroy_addr.unique_id);
 975         return 0;
 976 }
 977
 978 static int qeth_l3_iqd_read_initial_mac(struct qeth_card *card)
 979 {
 980         int rc = 0;
 981         struct qeth_cmd_buffer *iob;
 982         struct qeth_ipa_cmd *cmd;
 983
 984         QETH_CARD_TEXT(card, 2, "hsrmac");
 985
 986         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_CREATE_ADDR, QETH_PROT_IPV6,
 987                                  IPA_DATA_SIZEOF(create_destroy_addr));
 988         if (!iob)
 989                 return -ENOMEM;
 990         cmd = __ipa_cmd(iob);
 991         *((__u16 *) &cmd->data.create_destroy_addr.unique_id[6]) =
 992                         card->info.unique_id;
 993
 994         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_iqd_read_initial_mac_cb,
 995                                 NULL);
 996         return rc;
 997 }
 998
 999 static int qeth_l3_get_unique_id_cb(struct qeth_card *card,
1000                 struct qeth_reply *reply, unsigned long data)
1001 {
1002         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1003
1004         if (cmd->hdr.return_code == 0) {
1005                 card->info.unique_id = *((__u16 *)
1006                                 &cmd->data.create_destroy_addr.unique_id[6]);
1007                 return 0;
1008         }
1009
1010         card->info.unique_id = UNIQUE_ID_IF_CREATE_ADDR_FAILED |
1011                                UNIQUE_ID_NOT_BY_CARD;
1012         dev_warn(&card->gdev->dev, "The network adapter failed to generate a unique ID\n");
1013         return -EIO;
1014 }
1015
1016 static int qeth_l3_get_unique_id(struct qeth_card *card)
1017 {
1018         int rc = 0;
1019         struct qeth_cmd_buffer *iob;
1020         struct qeth_ipa_cmd *cmd;
1021
1022         QETH_CARD_TEXT(card, 2, "guniqeid");
1023
1024         if (!qeth_is_supported(card, IPA_IPV6)) {
1025                 card->info.unique_id =  UNIQUE_ID_IF_CREATE_ADDR_FAILED |
1026                                         UNIQUE_ID_NOT_BY_CARD;
1027                 return 0;
1028         }
1029
1030         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_CREATE_ADDR, QETH_PROT_IPV6,
1031                                  IPA_DATA_SIZEOF(create_destroy_addr));
1032         if (!iob)
1033                 return -ENOMEM;
1034         cmd = __ipa_cmd(iob);
1035         *((__u16 *) &cmd->data.create_destroy_addr.unique_id[6]) =
1036                         card->info.unique_id;
1037
1038         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_get_unique_id_cb, NULL);
1039         return rc;
1040 }
1041
1042 static int
1043 qeth_diags_trace_cb(struct qeth_card *card, struct qeth_reply *reply,
1044                             unsigned long data)
1045 {
1046         struct qeth_ipa_cmd        *cmd;
1047         __u16 rc;
1048
1049         QETH_CARD_TEXT(card, 2, "diastrcb");
1050
1051         cmd = (struct qeth_ipa_cmd *)data;
1052         rc = cmd->hdr.return_code;
1053         if (rc)
1054                 QETH_CARD_TEXT_(card, 2, "dxter%x", rc);
1055         switch (cmd->data.diagass.action) {
1056         case QETH_DIAGS_CMD_TRACE_QUERY:
1057                 break;
1058         case QETH_DIAGS_CMD_TRACE_DISABLE:
1059                 switch (rc) {
1060                 case 0:
1061                 case IPA_RC_INVALID_SUBCMD:
1062                         card->info.promisc_mode = SET_PROMISC_MODE_OFF;
1063                         dev_info(&card->gdev->dev, "The HiperSockets network "
1064                                 "traffic analyzer is deactivated\n");
1065                         break;
1066                 default:
1067                         break;
1068                 }
1069                 break;
1070         case QETH_DIAGS_CMD_TRACE_ENABLE:
1071                 switch (rc) {
1072                 case 0:
1073                         card->info.promisc_mode = SET_PROMISC_MODE_ON;
1074                         dev_info(&card->gdev->dev, "The HiperSockets network "
1075                                 "traffic analyzer is activated\n");
1076                         break;
1077                 case IPA_RC_HARDWARE_AUTH_ERROR:
1078                         dev_warn(&card->gdev->dev, "The device is not "
1079                                 "authorized to run as a HiperSockets network "
1080                                 "traffic analyzer\n");
1081                         break;
1082                 case IPA_RC_TRACE_ALREADY_ACTIVE:
1083                         dev_warn(&card->gdev->dev, "A HiperSockets "
1084                                 "network traffic analyzer is already "
1085                                 "active in the HiperSockets LAN\n");
1086                         break;
1087                 default:
1088                         break;
1089                 }
1090                 break;
1091         default:
1092                 QETH_DBF_MESSAGE(2, "Unknown sniffer action (%#06x) on device %x\n",
1093                                  cmd->data.diagass.action, CARD_DEVID(card));
1094         }
1095
1096         return rc ? -EIO : 0;
1097 }
1098
1099 static int
1100 qeth_diags_trace(struct qeth_card *card, enum qeth_diags_trace_cmds diags_cmd)
1101 {
1102         struct qeth_cmd_buffer *iob;
1103         struct qeth_ipa_cmd    *cmd;
1104
1105         QETH_CARD_TEXT(card, 2, "diagtrac");
1106
1107         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRACE, 0);
1108         if (!iob)
1109                 return -ENOMEM;
1110         cmd = __ipa_cmd(iob);
1111         cmd->data.diagass.type = QETH_DIAGS_TYPE_HIPERSOCKET;
1112         cmd->data.diagass.action = diags_cmd;
1113         return qeth_send_ipa_cmd(card, iob, qeth_diags_trace_cb, NULL);
1114 }
1115
1116 static void
1117 qeth_l3_add_mc_to_hash(struct qeth_card *card, struct in_device *in4_dev)
1118 {
1119         struct ip_mc_list *im4;
1120         struct qeth_ipaddr *tmp, *ipm;
1121
1122         QETH_CARD_TEXT(card, 4, "addmc");
1123
1124         tmp = qeth_l3_get_addr_buffer(QETH_PROT_IPV4);
1125         if (!tmp)
1126                 return;
1127
1128         for (im4 = rcu_dereference(in4_dev->mc_list); im4 != NULL;
1129              im4 = rcu_dereference(im4->next_rcu)) {
1130                 tmp->u.a4.addr = im4->multiaddr;
1131                 tmp->is_multicast = 1;
1132
1133                 ipm = qeth_l3_find_addr_by_ip(card, tmp);
1134                 if (ipm) {
1135                         /* for mcast, by-IP match means full match */
1136                         ipm->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
1137                 } else {
1138                         ipm = qeth_l3_get_addr_buffer(QETH_PROT_IPV4);
1139                         if (!ipm)
1140                                 continue;
1141
1142                         ipm->u.a4.addr = im4->multiaddr;
1143                         ipm->is_multicast = 1;
1144                         ipm->disp_flag = QETH_DISP_ADDR_ADD;
1145                         hash_add(card->ip_mc_htable,
1146                                         &ipm->hnode, qeth_l3_ipaddr_hash(ipm));
1147                 }
1148         }
1149
1150         kfree(tmp);
1151 }
1152
1153 /* called with rcu_read_lock */
1154 static void qeth_l3_add_vlan_mc(struct qeth_card *card)
1155 {
1156         struct in_device *in_dev;
1157         u16 vid;
1158
1159         QETH_CARD_TEXT(card, 4, "addmcvl");
1160
1161         if (!qeth_is_supported(card, IPA_FULL_VLAN))
1162                 return;
1163
1164         for_each_set_bit(vid, card->active_vlans, VLAN_N_VID) {
1165                 struct net_device *netdev;
1166
1167                 netdev = __vlan_find_dev_deep_rcu(card->dev, htons(ETH_P_8021Q),
1168                                               vid);
1169                 if (netdev == NULL ||
1170                     !(netdev->flags & IFF_UP))
1171                         continue;
1172                 in_dev = __in_dev_get_rcu(netdev);
1173                 if (!in_dev)
1174                         continue;
1175                 qeth_l3_add_mc_to_hash(card, in_dev);
1176         }
1177 }
1178
1179 static void qeth_l3_add_multicast_ipv4(struct qeth_card *card)
1180 {
1181         struct in_device *in4_dev;
1182
1183         QETH_CARD_TEXT(card, 4, "chkmcv4");
1184
1185         rcu_read_lock();
1186         in4_dev = __in_dev_get_rcu(card->dev);
1187         if (in4_dev == NULL)
1188                 goto unlock;
1189         qeth_l3_add_mc_to_hash(card, in4_dev);
1190         qeth_l3_add_vlan_mc(card);
1191 unlock:
1192         rcu_read_unlock();
1193 }
1194
1195 static void qeth_l3_add_mc6_to_hash(struct qeth_card *card,
1196                                     struct inet6_dev *in6_dev)
1197 {
1198         struct qeth_ipaddr *ipm;
1199         struct ifmcaddr6 *im6;
1200         struct qeth_ipaddr *tmp;
1201
1202         QETH_CARD_TEXT(card, 4, "addmc6");
1203
1204         tmp = qeth_l3_get_addr_buffer(QETH_PROT_IPV6);
1205         if (!tmp)
1206                 return;
1207
1208         read_lock_bh(&in6_dev->lock);
1209         for (im6 = in6_dev->mc_list; im6 != NULL; im6 = im6->next) {
1210                 tmp->u.a6.addr = im6->mca_addr;
1211                 tmp->is_multicast = 1;
1212
1213                 ipm = qeth_l3_find_addr_by_ip(card, tmp);
1214                 if (ipm) {
1215                         /* for mcast, by-IP match means full match */
1216                         ipm->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
1217                         continue;
1218                 }
1219
1220                 ipm = qeth_l3_get_addr_buffer(QETH_PROT_IPV6);
1221                 if (!ipm)
1222                         continue;
1223
1224                 ipm->u.a6.addr = im6->mca_addr;
1225                 ipm->is_multicast = 1;
1226                 ipm->disp_flag = QETH_DISP_ADDR_ADD;
1227                 hash_add(card->ip_mc_htable,
1228                                 &ipm->hnode, qeth_l3_ipaddr_hash(ipm));
1229
1230         }
1231         read_unlock_bh(&in6_dev->lock);
1232
1233         kfree(tmp);
1234 }
1235
1236 /* called with rcu_read_lock */
1237 static void qeth_l3_add_vlan_mc6(struct qeth_card *card)
1238 {
1239         struct inet6_dev *in_dev;
1240         u16 vid;
1241
1242         QETH_CARD_TEXT(card, 4, "admc6vl");
1243
1244         if (!qeth_is_supported(card, IPA_FULL_VLAN))
1245                 return;
1246
1247         for_each_set_bit(vid, card->active_vlans, VLAN_N_VID) {
1248                 struct net_device *netdev;
1249
1250                 netdev = __vlan_find_dev_deep_rcu(card->dev, htons(ETH_P_8021Q),
1251                                               vid);
1252                 if (netdev == NULL ||
1253                     !(netdev->flags & IFF_UP))
1254                         continue;
1255                 in_dev = in6_dev_get(netdev);
1256                 if (!in_dev)
1257                         continue;
1258                 qeth_l3_add_mc6_to_hash(card, in_dev);
1259                 in6_dev_put(in_dev);
1260         }
1261 }
1262
1263 static void qeth_l3_add_multicast_ipv6(struct qeth_card *card)
1264 {
1265         struct inet6_dev *in6_dev;
1266
1267         QETH_CARD_TEXT(card, 4, "chkmcv6");
1268
1269         if (!qeth_is_supported(card, IPA_IPV6))
1270                 return ;
1271         in6_dev = in6_dev_get(card->dev);
1272         if (!in6_dev)
1273                 return;
1274
1275         rcu_read_lock();
1276         qeth_l3_add_mc6_to_hash(card, in6_dev);
1277         qeth_l3_add_vlan_mc6(card);
1278         rcu_read_unlock();
1279         in6_dev_put(in6_dev);
1280 }
1281
1282 static int qeth_l3_vlan_rx_add_vid(struct net_device *dev,
1283                                    __be16 proto, u16 vid)
1284 {
1285         struct qeth_card *card = dev->ml_priv;
1286
1287         set_bit(vid, card->active_vlans);
1288         return 0;
1289 }
1290
1291 static int qeth_l3_vlan_rx_kill_vid(struct net_device *dev,
1292                                     __be16 proto, u16 vid)
1293 {
1294         struct qeth_card *card = dev->ml_priv;
1295
1296         QETH_CARD_TEXT_(card, 4, "kid:%d", vid);
1297
1298         clear_bit(vid, card->active_vlans);
1299         return 0;
1300 }
1301
1302 static void qeth_l3_rebuild_skb(struct qeth_card *card, struct sk_buff *skb,
1303                                 struct qeth_hdr *hdr)
1304 {
1305         struct af_iucv_trans_hdr *iucv = (struct af_iucv_trans_hdr *) skb->data;
1306         struct net_device *dev = skb->dev;
1307
1308         if (IS_IQD(card) && iucv->magic == ETH_P_AF_IUCV) {
1309                 dev_hard_header(skb, dev, ETH_P_AF_IUCV, dev->dev_addr,
1310                                 "FAKELL", skb->len);
1311                 return;
1312         }
1313
1314         if (!(hdr->hdr.l3.flags & QETH_HDR_PASSTHRU)) {
1315                 u16 prot = (hdr->hdr.l3.flags & QETH_HDR_IPV6) ? ETH_P_IPV6 :
1316                                                                  ETH_P_IP;
1317                 unsigned char tg_addr[ETH_ALEN];
1318
1319                 skb_reset_network_header(skb);
1320                 switch (hdr->hdr.l3.flags & QETH_HDR_CAST_MASK) {
1321                 case QETH_CAST_MULTICAST:
1322                         if (prot == ETH_P_IP)
1323                                 ip_eth_mc_map(ip_hdr(skb)->daddr, tg_addr);
1324                         else
1325                                 ipv6_eth_mc_map(&ipv6_hdr(skb)->daddr, tg_addr);
1326                         QETH_CARD_STAT_INC(card, rx_multicast);
1327                         break;
1328                 case QETH_CAST_BROADCAST:
1329                         ether_addr_copy(tg_addr, card->dev->broadcast);
1330                         QETH_CARD_STAT_INC(card, rx_multicast);
1331                         break;
1332                 default:
1333                         if (card->options.sniffer)
1334                                 skb->pkt_type = PACKET_OTHERHOST;
1335                         ether_addr_copy(tg_addr, card->dev->dev_addr);
1336                 }
1337
1338                 if (hdr->hdr.l3.ext_flags & QETH_HDR_EXT_SRC_MAC_ADDR)
1339                         card->dev->header_ops->create(skb, card->dev, prot,
1340                                 tg_addr, &hdr->hdr.l3.next_hop.rx.src_mac,
1341                                 skb->len);
1342                 else
1343                         card->dev->header_ops->create(skb, card->dev, prot,
1344                                 tg_addr, "FAKELL", skb->len);
1345         }
1346
1347         /* copy VLAN tag from hdr into skb */
1348         if (!card->options.sniffer &&
1349             (hdr->hdr.l3.ext_flags & (QETH_HDR_EXT_VLAN_FRAME |
1350                                       QETH_HDR_EXT_INCLUDE_VLAN_TAG))) {
1351                 u16 tag = (hdr->hdr.l3.ext_flags & QETH_HDR_EXT_VLAN_FRAME) ?
1352                                 hdr->hdr.l3.vlan_id :
1353                                 hdr->hdr.l3.next_hop.rx.vlan_id;
1354                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag);
1355         }
1356
1357         qeth_rx_csum(card, skb, hdr->hdr.l3.ext_flags);
1358 }
1359
1360 static int qeth_l3_process_inbound_buffer(struct qeth_card *card,
1361                                 int budget, int *done)
1362 {
1363         int work_done = 0;
1364         struct sk_buff *skb;
1365         struct qeth_hdr *hdr;
1366
1367         *done = 0;
1368         WARN_ON_ONCE(!budget);
1369         while (budget) {
1370                 skb = qeth_core_get_next_skb(card,
1371                         &card->qdio.in_q->bufs[card->rx.b_index],
1372                         &card->rx.b_element, &card->rx.e_offset, &hdr);
1373                 if (!skb) {
1374                         *done = 1;
1375                         break;
1376                 }
1377
1378                 if (hdr->hdr.l3.id == QETH_HEADER_TYPE_LAYER3)
1379                         qeth_l3_rebuild_skb(card, skb, hdr);
1380
1381                 skb->protocol = eth_type_trans(skb, skb->dev);
1382                 QETH_CARD_STAT_INC(card, rx_packets);
1383                 QETH_CARD_STAT_ADD(card, rx_bytes, skb->len);
1384
1385                 napi_gro_receive(&card->napi, skb);
1386                 work_done++;
1387                 budget--;
1388         }
1389         return work_done;
1390 }
1391
1392 static void qeth_l3_stop_card(struct qeth_card *card)
1393 {
1394         QETH_CARD_TEXT(card, 2, "stopcard");
1395
1396         qeth_set_allowed_threads(card, 0, 1);
1397
1398         cancel_work_sync(&card->rx_mode_work);
1399         qeth_l3_drain_rx_mode_cache(card);
1400
1401         if (card->options.sniffer &&
1402             (card->info.promisc_mode == SET_PROMISC_MODE_ON))
1403                 qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_DISABLE);
1404
1405         if (card->state == CARD_STATE_SOFTSETUP) {
1406                 qeth_l3_clear_ip_htable(card, 1);
1407                 qeth_clear_ipacmd_list(card);
1408                 card->state = CARD_STATE_HARDSETUP;
1409         }
1410         if (card->state == CARD_STATE_HARDSETUP) {
1411                 qeth_qdio_clear_card(card, 0);
1412                 qeth_drain_output_queues(card);
1413                 qeth_clear_working_pool_list(card);
1414                 card->state = CARD_STATE_DOWN;
1415         }
1416
1417         flush_workqueue(card->event_wq);
1418 }
1419
1420 static void qeth_l3_set_promisc_mode(struct qeth_card *card)
1421 {
1422         bool enable = card->dev->flags & IFF_PROMISC;
1423
1424         if (card->info.promisc_mode == enable)
1425                 return;
1426
1427         if (IS_VM_NIC(card)) {          /* Guestlan trace */
1428                 if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
1429                         qeth_setadp_promisc_mode(card, enable);
1430         } else if (card->options.sniffer &&     /* HiperSockets trace */
1431                    qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
1432                 if (enable) {
1433                         QETH_CARD_TEXT(card, 3, "+promisc");
1434                         qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_ENABLE);
1435                 } else {
1436                         QETH_CARD_TEXT(card, 3, "-promisc");
1437                         qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_DISABLE);
1438                 }
1439         }
1440 }
1441
1442 static void qeth_l3_rx_mode_work(struct work_struct *work)
1443 {
1444         struct qeth_card *card = container_of(work, struct qeth_card,
1445                                               rx_mode_work);
1446         struct qeth_ipaddr *addr;
1447         struct hlist_node *tmp;
1448         int i, rc;
1449
1450         QETH_CARD_TEXT(card, 3, "setmulti");
1451
1452         if (!card->options.sniffer) {
1453                 qeth_l3_add_multicast_ipv4(card);
1454                 qeth_l3_add_multicast_ipv6(card);
1455
1456                 hash_for_each_safe(card->ip_mc_htable, i, tmp, addr, hnode) {
1457                         switch (addr->disp_flag) {
1458                         case QETH_DISP_ADDR_DELETE:
1459                                 rc = qeth_l3_deregister_addr_entry(card, addr);
1460                                 if (!rc || rc == -ENOENT) {
1461                                         hash_del(&addr->hnode);
1462                                         kfree(addr);
1463                                 }
1464                                 break;
1465                         case QETH_DISP_ADDR_ADD:
1466                                 rc = qeth_l3_register_addr_entry(card, addr);
1467                                 if (rc && rc != -ENETDOWN) {
1468                                         hash_del(&addr->hnode);
1469                                         kfree(addr);
1470                                         break;
1471                                 }
1472                                 addr->ref_counter = 1;
1473                                 /* fall through */
1474                         default:
1475                                 /* for next call to set_rx_mode(): */
1476                                 addr->disp_flag = QETH_DISP_ADDR_DELETE;
1477                         }
1478                 }
1479         }
1480
1481         qeth_l3_set_promisc_mode(card);
1482 }
1483
1484 static int qeth_l3_arp_makerc(u16 rc)
1485 {
1486         switch (rc) {
1487         case IPA_RC_SUCCESS:
1488                 return 0;
1489         case QETH_IPA_ARP_RC_NOTSUPP:
1490         case QETH_IPA_ARP_RC_Q_NOTSUPP:
1491                 return -EOPNOTSUPP;
1492         case QETH_IPA_ARP_RC_OUT_OF_RANGE:
1493                 return -EINVAL;
1494         case QETH_IPA_ARP_RC_Q_NO_DATA:
1495                 return -ENOENT;
1496         default:
1497                 return -EIO;
1498         }
1499 }
1500
1501 static int qeth_l3_arp_cmd_cb(struct qeth_card *card, struct qeth_reply *reply,
1502                               unsigned long data)
1503 {
1504         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1505
1506         qeth_setassparms_cb(card, reply, data);
1507         return qeth_l3_arp_makerc(cmd->hdr.return_code);
1508 }
1509
1510 static int qeth_l3_arp_set_no_entries(struct qeth_card *card, int no_entries)
1511 {
1512         struct qeth_cmd_buffer *iob;
1513         int rc;
1514
1515         QETH_CARD_TEXT(card, 3, "arpstnoe");
1516
1517         /*
1518          * currently GuestLAN only supports the ARP assist function
1519          * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_SET_NO_ENTRIES;
1520          * thus we say EOPNOTSUPP for this ARP function
1521          */
1522         if (IS_VM_NIC(card))
1523                 return -EOPNOTSUPP;
1524         if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1525                 return -EOPNOTSUPP;
1526         }
1527
1528         iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1529                                        IPA_CMD_ASS_ARP_SET_NO_ENTRIES,
1530                                        SETASS_DATA_SIZEOF(flags_32bit),
1531                                        QETH_PROT_IPV4);
1532         if (!iob)
1533                 return -ENOMEM;
1534
1535         __ipa_cmd(iob)->data.setassparms.data.flags_32bit = (u32) no_entries;
1536         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
1537         if (rc)
1538                 QETH_DBF_MESSAGE(2, "Could not set number of ARP entries on device %x: %#x\n",
1539                                  CARD_DEVID(card), rc);
1540         return rc;
1541 }
1542
1543 static __u32 get_arp_entry_size(struct qeth_card *card,
1544                         struct qeth_arp_query_data *qdata,
1545                         struct qeth_arp_entrytype *type, __u8 strip_entries)
1546 {
1547         __u32 rc;
1548         __u8 is_hsi;
1549
1550         is_hsi = qdata->reply_bits == 5;
1551         if (type->ip == QETHARP_IP_ADDR_V4) {
1552                 QETH_CARD_TEXT(card, 4, "arpev4");
1553                 if (strip_entries) {
1554                         rc = is_hsi ? sizeof(struct qeth_arp_qi_entry5_short) :
1555                                 sizeof(struct qeth_arp_qi_entry7_short);
1556                 } else {
1557                         rc = is_hsi ? sizeof(struct qeth_arp_qi_entry5) :
1558                                 sizeof(struct qeth_arp_qi_entry7);
1559                 }
1560         } else if (type->ip == QETHARP_IP_ADDR_V6) {
1561                 QETH_CARD_TEXT(card, 4, "arpev6");
1562                 if (strip_entries) {
1563                         rc = is_hsi ?
1564                                 sizeof(struct qeth_arp_qi_entry5_short_ipv6) :
1565                                 sizeof(struct qeth_arp_qi_entry7_short_ipv6);
1566                 } else {
1567                         rc = is_hsi ?
1568                                 sizeof(struct qeth_arp_qi_entry5_ipv6) :
1569                                 sizeof(struct qeth_arp_qi_entry7_ipv6);
1570                 }
1571         } else {
1572                 QETH_CARD_TEXT(card, 4, "arpinv");
1573                 rc = 0;
1574         }
1575
1576         return rc;
1577 }
1578
1579 static int arpentry_matches_prot(struct qeth_arp_entrytype *type, __u16 prot)
1580 {
1581         return (type->ip == QETHARP_IP_ADDR_V4 && prot == QETH_PROT_IPV4) ||
1582                 (type->ip == QETHARP_IP_ADDR_V6 && prot == QETH_PROT_IPV6);
1583 }
1584
1585 static int qeth_l3_arp_query_cb(struct qeth_card *card,
1586                 struct qeth_reply *reply, unsigned long data)
1587 {
1588         struct qeth_ipa_cmd *cmd;
1589         struct qeth_arp_query_data *qdata;
1590         struct qeth_arp_query_info *qinfo;
1591         int e;
1592         int entrybytes_done;
1593         int stripped_bytes;
1594         __u8 do_strip_entries;
1595
1596         QETH_CARD_TEXT(card, 3, "arpquecb");
1597
1598         qinfo = (struct qeth_arp_query_info *) reply->param;
1599         cmd = (struct qeth_ipa_cmd *) data;
1600         QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.prot_version);
1601         if (cmd->hdr.return_code) {
1602                 QETH_CARD_TEXT(card, 4, "arpcberr");
1603                 QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.return_code);
1604                 return qeth_l3_arp_makerc(cmd->hdr.return_code);
1605         }
1606         if (cmd->data.setassparms.hdr.return_code) {
1607                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
1608                 QETH_CARD_TEXT(card, 4, "setaperr");
1609                 QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.return_code);
1610                 return qeth_l3_arp_makerc(cmd->hdr.return_code);
1611         }
1612         qdata = &cmd->data.setassparms.data.query_arp;
1613         QETH_CARD_TEXT_(card, 4, "anoen%i", qdata->no_entries);
1614
1615         do_strip_entries = (qinfo->mask_bits & QETH_QARP_STRIP_ENTRIES) > 0;
1616         stripped_bytes = do_strip_entries ? QETH_QARP_MEDIASPECIFIC_BYTES : 0;
1617         entrybytes_done = 0;
1618         for (e = 0; e < qdata->no_entries; ++e) {
1619                 char *cur_entry;
1620                 __u32 esize;
1621                 struct qeth_arp_entrytype *etype;
1622
1623                 cur_entry = &qdata->data + entrybytes_done;
1624                 etype = &((struct qeth_arp_qi_entry5 *) cur_entry)->type;
1625                 if (!arpentry_matches_prot(etype, cmd->hdr.prot_version)) {
1626                         QETH_CARD_TEXT(card, 4, "pmis");
1627                         QETH_CARD_TEXT_(card, 4, "%i", etype->ip);
1628                         break;
1629                 }
1630                 esize = get_arp_entry_size(card, qdata, etype,
1631                         do_strip_entries);
1632                 QETH_CARD_TEXT_(card, 5, "esz%i", esize);
1633                 if (!esize)
1634                         break;
1635
1636                 if ((qinfo->udata_len - qinfo->udata_offset) < esize) {
1637                         QETH_CARD_TEXT_(card, 4, "qaer3%i", -ENOSPC);
1638                         memset(qinfo->udata, 0, 4);
1639                         return -ENOSPC;
1640                 }
1641
1642                 memcpy(qinfo->udata + qinfo->udata_offset,
1643                         &qdata->data + entrybytes_done + stripped_bytes,
1644                         esize);
1645                 entrybytes_done += esize + stripped_bytes;
1646                 qinfo->udata_offset += esize;
1647                 ++qinfo->no_entries;
1648         }
1649         /* check if all replies received ... */
1650         if (cmd->data.setassparms.hdr.seq_no <
1651             cmd->data.setassparms.hdr.number_of_replies)
1652                 return 1;
1653         QETH_CARD_TEXT_(card, 4, "nove%i", qinfo->no_entries);
1654         memcpy(qinfo->udata, &qinfo->no_entries, 4);
1655         /* keep STRIP_ENTRIES flag so the user program can distinguish
1656          * stripped entries from normal ones */
1657         if (qinfo->mask_bits & QETH_QARP_STRIP_ENTRIES)
1658                 qdata->reply_bits |= QETH_QARP_STRIP_ENTRIES;
1659         memcpy(qinfo->udata + QETH_QARP_MASK_OFFSET, &qdata->reply_bits, 2);
1660         QETH_CARD_TEXT_(card, 4, "rc%i", 0);
1661         return 0;
1662 }
1663
1664 static int qeth_l3_query_arp_cache_info(struct qeth_card *card,
1665         enum qeth_prot_versions prot,
1666         struct qeth_arp_query_info *qinfo)
1667 {
1668         struct qeth_cmd_buffer *iob;
1669         struct qeth_ipa_cmd *cmd;
1670         int rc;
1671
1672         QETH_CARD_TEXT_(card, 3, "qarpipv%i", prot);
1673
1674         iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1675                                        IPA_CMD_ASS_ARP_QUERY_INFO,
1676                                        SETASS_DATA_SIZEOF(query_arp), prot);
1677         if (!iob)
1678                 return -ENOMEM;
1679         cmd = __ipa_cmd(iob);
1680         cmd->data.setassparms.data.query_arp.request_bits = 0x000F;
1681         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_query_cb, qinfo);
1682         if (rc)
1683                 QETH_DBF_MESSAGE(2, "Error while querying ARP cache on device %x: %#x\n",
1684                                  CARD_DEVID(card), rc);
1685         return rc;
1686 }
1687
1688 static int qeth_l3_arp_query(struct qeth_card *card, char __user *udata)
1689 {
1690         struct qeth_arp_query_info qinfo = {0, };
1691         int rc;
1692
1693         QETH_CARD_TEXT(card, 3, "arpquery");
1694
1695         if (!qeth_is_supported(card,/*IPA_QUERY_ARP_ADDR_INFO*/
1696                                IPA_ARP_PROCESSING)) {
1697                 QETH_CARD_TEXT(card, 3, "arpqnsup");
1698                 rc = -EOPNOTSUPP;
1699                 goto out;
1700         }
1701         /* get size of userspace buffer and mask_bits -> 6 bytes */
1702         if (copy_from_user(&qinfo, udata, 6)) {
1703                 rc = -EFAULT;
1704                 goto out;
1705         }
1706         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
1707         if (!qinfo.udata) {
1708                 rc = -ENOMEM;
1709                 goto out;
1710         }
1711         qinfo.udata_offset = QETH_QARP_ENTRIES_OFFSET;
1712         rc = qeth_l3_query_arp_cache_info(card, QETH_PROT_IPV4, &qinfo);
1713         if (rc) {
1714                 if (copy_to_user(udata, qinfo.udata, 4))
1715                         rc = -EFAULT;
1716                 goto free_and_out;
1717         }
1718         if (qinfo.mask_bits & QETH_QARP_WITH_IPV6) {
1719                 /* fails in case of GuestLAN QDIO mode */
1720                 qeth_l3_query_arp_cache_info(card, QETH_PROT_IPV6, &qinfo);
1721         }
1722         if (copy_to_user(udata, qinfo.udata, qinfo.udata_len)) {
1723                 QETH_CARD_TEXT(card, 4, "qactf");
1724                 rc = -EFAULT;
1725                 goto free_and_out;
1726         }
1727         QETH_CARD_TEXT(card, 4, "qacts");
1728
1729 free_and_out:
1730         kfree(qinfo.udata);
1731 out:
1732         return rc;
1733 }
1734
1735 static int qeth_l3_arp_modify_entry(struct qeth_card *card,
1736                                     struct qeth_arp_cache_entry *entry,
1737                                     enum qeth_arp_process_subcmds arp_cmd)
1738 {
1739         struct qeth_arp_cache_entry *cmd_entry;
1740         struct qeth_cmd_buffer *iob;
1741         int rc;
1742
1743         if (arp_cmd == IPA_CMD_ASS_ARP_ADD_ENTRY)
1744                 QETH_CARD_TEXT(card, 3, "arpadd");
1745         else
1746                 QETH_CARD_TEXT(card, 3, "arpdel");
1747
1748         /*
1749          * currently GuestLAN only supports the ARP assist function
1750          * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_ADD_ENTRY;
1751          * thus we say EOPNOTSUPP for this ARP function
1752          */
1753         if (IS_VM_NIC(card))
1754                 return -EOPNOTSUPP;
1755         if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1756                 return -EOPNOTSUPP;
1757         }
1758
1759         iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING, arp_cmd,
1760                                        SETASS_DATA_SIZEOF(arp_entry),
1761                                        QETH_PROT_IPV4);
1762         if (!iob)
1763                 return -ENOMEM;
1764
1765         cmd_entry = &__ipa_cmd(iob)->data.setassparms.data.arp_entry;
1766         ether_addr_copy(cmd_entry->macaddr, entry->macaddr);
1767         memcpy(cmd_entry->ipaddr, entry->ipaddr, 4);
1768         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
1769         if (rc)
1770                 QETH_DBF_MESSAGE(2, "Could not modify (cmd: %#x) ARP entry on device %x: %#x\n",
1771                                  arp_cmd, CARD_DEVID(card), rc);
1772         return rc;
1773 }
1774
1775 static int qeth_l3_arp_flush_cache(struct qeth_card *card)
1776 {
1777         struct qeth_cmd_buffer *iob;
1778         int rc;
1779
1780         QETH_CARD_TEXT(card, 3, "arpflush");
1781
1782         /*
1783          * currently GuestLAN only supports the ARP assist function
1784          * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_FLUSH_CACHE;
1785          * thus we say EOPNOTSUPP for this ARP function
1786         */
1787         if (IS_VM_NIC(card) || IS_IQD(card))
1788                 return -EOPNOTSUPP;
1789         if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1790                 return -EOPNOTSUPP;
1791         }
1792
1793         iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1794                                        IPA_CMD_ASS_ARP_FLUSH_CACHE, 0,
1795                                        QETH_PROT_IPV4);
1796         if (!iob)
1797                 return -ENOMEM;
1798
1799         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
1800         if (rc)
1801                 QETH_DBF_MESSAGE(2, "Could not flush ARP cache on device %x: %#x\n",
1802                                  CARD_DEVID(card), rc);
1803         return rc;
1804 }
1805
1806 static int qeth_l3_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1807 {
1808         struct qeth_card *card = dev->ml_priv;
1809         struct qeth_arp_cache_entry arp_entry;
1810         enum qeth_arp_process_subcmds arp_cmd;
1811         int rc = 0;
1812
1813         switch (cmd) {
1814         case SIOC_QETH_ARP_SET_NO_ENTRIES:
1815                 if (!capable(CAP_NET_ADMIN)) {
1816                         rc = -EPERM;
1817                         break;
1818                 }
1819                 rc = qeth_l3_arp_set_no_entries(card, rq->ifr_ifru.ifru_ivalue);
1820                 break;
1821         case SIOC_QETH_ARP_QUERY_INFO:
1822                 if (!capable(CAP_NET_ADMIN)) {
1823                         rc = -EPERM;
1824                         break;
1825                 }
1826                 rc = qeth_l3_arp_query(card, rq->ifr_ifru.ifru_data);
1827                 break;
1828         case SIOC_QETH_ARP_ADD_ENTRY:
1829         case SIOC_QETH_ARP_REMOVE_ENTRY:
1830                 if (!capable(CAP_NET_ADMIN))
1831                         return -EPERM;
1832                 if (copy_from_user(&arp_entry, rq->ifr_data, sizeof(arp_entry)))
1833                         return -EFAULT;
1834
1835                 arp_cmd = (cmd == SIOC_QETH_ARP_ADD_ENTRY) ?
1836                                 IPA_CMD_ASS_ARP_ADD_ENTRY :
1837                                 IPA_CMD_ASS_ARP_REMOVE_ENTRY;
1838                 return qeth_l3_arp_modify_entry(card, &arp_entry, arp_cmd);
1839         case SIOC_QETH_ARP_FLUSH_CACHE:
1840                 if (!capable(CAP_NET_ADMIN)) {
1841                         rc = -EPERM;
1842                         break;
1843                 }
1844                 rc = qeth_l3_arp_flush_cache(card);
1845                 break;
1846         default:
1847                 rc = -EOPNOTSUPP;
1848         }
1849         return rc;
1850 }
1851
1852 static int qeth_l3_get_cast_type_rcu(struct sk_buff *skb, struct dst_entry *dst,
1853                                      int ipv)
1854 {
1855         struct neighbour *n = NULL;
1856
1857         if (dst)
1858                 n = dst_neigh_lookup_skb(dst, skb);
1859
1860         if (n) {
1861                 int cast_type = n->type;
1862
1863                 neigh_release(n);
1864                 if ((cast_type == RTN_BROADCAST) ||
1865                     (cast_type == RTN_MULTICAST) ||
1866                     (cast_type == RTN_ANYCAST))
1867                         return cast_type;
1868                 return RTN_UNICAST;
1869         }
1870
1871         /* no neighbour (eg AF_PACKET), fall back to target's IP address ... */
1872         switch (ipv) {
1873         case 4:
1874                 if (ipv4_is_lbcast(ip_hdr(skb)->daddr))
1875                         return RTN_BROADCAST;
1876                 return ipv4_is_multicast(ip_hdr(skb)->daddr) ?
1877                                 RTN_MULTICAST : RTN_UNICAST;
1878         case 6:
1879                 return ipv6_addr_is_multicast(&ipv6_hdr(skb)->daddr) ?
1880                                 RTN_MULTICAST : RTN_UNICAST;
1881         default:
1882                 /* ... and MAC address */
1883                 return qeth_get_ether_cast_type(skb);
1884         }
1885 }
1886
1887 static int qeth_l3_get_cast_type(struct sk_buff *skb)
1888 {
1889         int ipv = qeth_get_ip_version(skb);
1890         struct dst_entry *dst;
1891         int cast_type;
1892
1893         rcu_read_lock();
1894         dst = qeth_dst_check_rcu(skb, ipv);
1895         cast_type = qeth_l3_get_cast_type_rcu(skb, dst, ipv);
1896         rcu_read_unlock();
1897
1898         return cast_type;
1899 }
1900
1901 static u8 qeth_l3_cast_type_to_flag(int cast_type)
1902 {
1903         if (cast_type == RTN_MULTICAST)
1904                 return QETH_CAST_MULTICAST;
1905         if (cast_type == RTN_ANYCAST)
1906                 return QETH_CAST_ANYCAST;
1907         if (cast_type == RTN_BROADCAST)
1908                 return QETH_CAST_BROADCAST;
1909         return QETH_CAST_UNICAST;
1910 }
1911
1912 static void qeth_l3_fill_header(struct qeth_qdio_out_q *queue,
1913                                 struct qeth_hdr *hdr, struct sk_buff *skb,
1914                                 int ipv, unsigned int data_len)
1915 {
1916         struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3;
1917         struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
1918         struct qeth_card *card = queue->card;
1919         struct dst_entry *dst;
1920         int cast_type;
1921
1922         hdr->hdr.l3.length = data_len;
1923
1924         if (skb_is_gso(skb)) {
1925                 hdr->hdr.l3.id = QETH_HEADER_TYPE_L3_TSO;
1926         } else {
1927                 hdr->hdr.l3.id = QETH_HEADER_TYPE_LAYER3;
1928
1929                 if (skb->protocol == htons(ETH_P_AF_IUCV)) {
1930                         l3_hdr->flags = QETH_HDR_IPV6 | QETH_CAST_UNICAST;
1931                         l3_hdr->next_hop.ipv6_addr.s6_addr16[0] = htons(0xfe80);
1932                         memcpy(&l3_hdr->next_hop.ipv6_addr.s6_addr32[2],
1933                                iucv_trans_hdr(skb)->destUserID, 8);
1934                         return;
1935                 }
1936
1937                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1938                         qeth_tx_csum(skb, &hdr->hdr.l3.ext_flags, ipv);
1939                         /* some HW requires combined L3+L4 csum offload: */
1940                         if (ipv == 4)
1941                                 hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_CSUM_HDR_REQ;
1942                 }
1943         }
1944
1945         if (ipv == 4 || IS_IQD(card)) {
1946                 /* NETIF_F_HW_VLAN_CTAG_TX */
1947                 if (skb_vlan_tag_present(skb)) {
1948                         hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_VLAN_FRAME;
1949                         hdr->hdr.l3.vlan_id = skb_vlan_tag_get(skb);
1950                 }
1951         } else if (veth->h_vlan_proto == htons(ETH_P_8021Q)) {
1952                 hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_INCLUDE_VLAN_TAG;
1953                 hdr->hdr.l3.vlan_id = ntohs(veth->h_vlan_TCI);
1954         }
1955
1956         rcu_read_lock();
1957         dst = qeth_dst_check_rcu(skb, ipv);
1958
1959         if (IS_IQD(card) && skb_get_queue_mapping(skb) != QETH_IQD_MCAST_TXQ)
1960                 cast_type = RTN_UNICAST;
1961         else
1962                 cast_type = qeth_l3_get_cast_type_rcu(skb, dst, ipv);
1963         l3_hdr->flags |= qeth_l3_cast_type_to_flag(cast_type);
1964
1965         if (ipv == 4) {
1966                 struct rtable *rt = (struct rtable *) dst;
1967
1968                 *((__be32 *) &hdr->hdr.l3.next_hop.ipv4.addr) = (rt) ?
1969                                 rt_nexthop(rt, ip_hdr(skb)->daddr) :
1970                                 ip_hdr(skb)->daddr;
1971         } else if (ipv == 6) {
1972                 struct rt6_info *rt = (struct rt6_info *) dst;
1973
1974                 if (rt && !ipv6_addr_any(&rt->rt6i_gateway))
1975                         l3_hdr->next_hop.ipv6_addr = rt->rt6i_gateway;
1976                 else
1977                         l3_hdr->next_hop.ipv6_addr = ipv6_hdr(skb)->daddr;
1978
1979                 hdr->hdr.l3.flags |= QETH_HDR_IPV6;
1980                 if (!IS_IQD(card))
1981                         hdr->hdr.l3.flags |= QETH_HDR_PASSTHRU;
1982         } else {
1983                 /* OSA only: */
1984                 l3_hdr->flags |= QETH_HDR_PASSTHRU;
1985         }
1986         rcu_read_unlock();
1987 }
1988
1989 static void qeth_l3_fixup_headers(struct sk_buff *skb)
1990 {
1991         struct iphdr *iph = ip_hdr(skb);
1992
1993         /* this is safe, IPv6 traffic takes a different path */
1994         if (skb->ip_summed == CHECKSUM_PARTIAL)
1995                 iph->check = 0;
1996         if (skb_is_gso(skb)) {
1997                 iph->tot_len = 0;
1998                 tcp_hdr(skb)->check = ~tcp_v4_check(0, iph->saddr,
1999                                                     iph->daddr, 0);
2000         }
2001 }
2002
2003 static int qeth_l3_xmit(struct qeth_card *card, struct sk_buff *skb,
2004                         struct qeth_qdio_out_q *queue, int ipv)
2005 {
2006         unsigned int hw_hdr_len;
2007         int rc;
2008
2009         /* re-use the L2 header area for the HW header: */
2010         hw_hdr_len = skb_is_gso(skb) ? sizeof(struct qeth_hdr_tso) :
2011                                        sizeof(struct qeth_hdr);
2012         rc = skb_cow_head(skb, hw_hdr_len - ETH_HLEN);
2013         if (rc)
2014                 return rc;
2015         skb_pull(skb, ETH_HLEN);
2016
2017         qeth_l3_fixup_headers(skb);
2018         return qeth_xmit(card, skb, queue, ipv, qeth_l3_fill_header);
2019 }
2020
2021 static netdev_tx_t qeth_l3_hard_start_xmit(struct sk_buff *skb,
2022                                            struct net_device *dev)
2023 {
2024         struct qeth_card *card = dev->ml_priv;
2025         u16 txq = skb_get_queue_mapping(skb);
2026         int ipv = qeth_get_ip_version(skb);
2027         struct qeth_qdio_out_q *queue;
2028         int rc;
2029
2030         if (!skb_is_gso(skb))
2031                 qdisc_skb_cb(skb)->pkt_len = skb->len;
2032         if (IS_IQD(card)) {
2033                 queue = card->qdio.out_qs[qeth_iqd_translate_txq(dev, txq)];
2034
2035                 if (card->options.sniffer)
2036                         goto tx_drop;
2037                 if ((card->options.cq != QETH_CQ_ENABLED && !ipv) ||
2038                     (card->options.cq == QETH_CQ_ENABLED &&
2039                      skb->protocol != htons(ETH_P_AF_IUCV)))
2040                         goto tx_drop;
2041         } else {
2042                 queue = card->qdio.out_qs[txq];
2043         }
2044
2045         if (!(dev->flags & IFF_BROADCAST) &&
2046             qeth_l3_get_cast_type(skb) == RTN_BROADCAST)
2047                 goto tx_drop;
2048
2049         if (ipv == 4 || IS_IQD(card))
2050                 rc = qeth_l3_xmit(card, skb, queue, ipv);
2051         else
2052                 rc = qeth_xmit(card, skb, queue, ipv, qeth_l3_fill_header);
2053
2054         if (!rc)
2055                 return NETDEV_TX_OK;
2056
2057 tx_drop:
2058         QETH_TXQ_STAT_INC(queue, tx_dropped);
2059         kfree_skb(skb);
2060         return NETDEV_TX_OK;
2061 }
2062
2063 static void qeth_l3_set_rx_mode(struct net_device *dev)
2064 {
2065         struct qeth_card *card = dev->ml_priv;
2066
2067         schedule_work(&card->rx_mode_work);
2068 }
2069
2070 /*
2071  * we need NOARP for IPv4 but we want neighbor solicitation for IPv6. Setting
2072  * NOARP on the netdevice is no option because it also turns off neighbor
2073  * solicitation. For IPv4 we install a neighbor_setup function. We don't want
2074  * arp resolution but we want the hard header (packet socket will work
2075  * e.g. tcpdump)
2076  */
2077 static int qeth_l3_neigh_setup_noarp(struct neighbour *n)
2078 {
2079         n->nud_state = NUD_NOARP;
2080         memcpy(n->ha, "FAKELL", 6);
2081         n->output = n->ops->connected_output;
2082         return 0;
2083 }
2084
2085 static int
2086 qeth_l3_neigh_setup(struct net_device *dev, struct neigh_parms *np)
2087 {
2088         if (np->tbl->family == AF_INET)
2089                 np->neigh_setup = qeth_l3_neigh_setup_noarp;
2090
2091         return 0;
2092 }
2093
2094 static netdev_features_t qeth_l3_osa_features_check(struct sk_buff *skb,
2095                                                     struct net_device *dev,
2096                                                     netdev_features_t features)
2097 {
2098         if (qeth_get_ip_version(skb) != 4)
2099                 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
2100         return qeth_features_check(skb, dev, features);
2101 }
2102
2103 static u16 qeth_l3_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
2104                                     struct net_device *sb_dev)
2105 {
2106         return qeth_iqd_select_queue(dev, skb, qeth_l3_get_cast_type(skb),
2107                                      sb_dev);
2108 }
2109
2110 static u16 qeth_l3_osa_select_queue(struct net_device *dev, struct sk_buff *skb,
2111                                     struct net_device *sb_dev)
2112 {
2113         struct qeth_card *card = dev->ml_priv;
2114
2115         return qeth_get_priority_queue(card, skb);
2116 }
2117
2118 static const struct net_device_ops qeth_l3_netdev_ops = {
2119         .ndo_open               = qeth_open,
2120         .ndo_stop               = qeth_stop,
2121         .ndo_get_stats64        = qeth_get_stats64,
2122         .ndo_start_xmit         = qeth_l3_hard_start_xmit,
2123         .ndo_select_queue       = qeth_l3_iqd_select_queue,
2124         .ndo_validate_addr      = eth_validate_addr,
2125         .ndo_set_rx_mode        = qeth_l3_set_rx_mode,
2126         .ndo_do_ioctl           = qeth_do_ioctl,
2127         .ndo_fix_features       = qeth_fix_features,
2128         .ndo_set_features       = qeth_set_features,
2129         .ndo_vlan_rx_add_vid    = qeth_l3_vlan_rx_add_vid,
2130         .ndo_vlan_rx_kill_vid   = qeth_l3_vlan_rx_kill_vid,
2131         .ndo_tx_timeout         = qeth_tx_timeout,
2132 };
2133
2134 static const struct net_device_ops qeth_l3_osa_netdev_ops = {
2135         .ndo_open               = qeth_open,
2136         .ndo_stop               = qeth_stop,
2137         .ndo_get_stats64        = qeth_get_stats64,
2138         .ndo_start_xmit         = qeth_l3_hard_start_xmit,
2139         .ndo_features_check     = qeth_l3_osa_features_check,
2140         .ndo_select_queue       = qeth_l3_osa_select_queue,
2141         .ndo_validate_addr      = eth_validate_addr,
2142         .ndo_set_rx_mode        = qeth_l3_set_rx_mode,
2143         .ndo_do_ioctl           = qeth_do_ioctl,
2144         .ndo_fix_features       = qeth_fix_features,
2145         .ndo_set_features       = qeth_set_features,
2146         .ndo_vlan_rx_add_vid    = qeth_l3_vlan_rx_add_vid,
2147         .ndo_vlan_rx_kill_vid   = qeth_l3_vlan_rx_kill_vid,
2148         .ndo_tx_timeout         = qeth_tx_timeout,
2149         .ndo_neigh_setup        = qeth_l3_neigh_setup,
2150 };
2151
2152 static int qeth_l3_setup_netdev(struct qeth_card *card, bool carrier_ok)
2153 {
2154         unsigned int headroom;
2155         int rc;
2156
2157         if (IS_OSD(card) || IS_OSX(card)) {
2158                 if ((card->info.link_type == QETH_LINK_TYPE_LANE_TR) ||
2159                     (card->info.link_type == QETH_LINK_TYPE_HSTR)) {
2160                         pr_info("qeth_l3: ignoring TR device\n");
2161                         return -ENODEV;
2162                 }
2163
2164                 card->dev->netdev_ops = &qeth_l3_osa_netdev_ops;
2165
2166                 /*IPv6 address autoconfiguration stuff*/
2167                 qeth_l3_get_unique_id(card);
2168                 if (!(card->info.unique_id & UNIQUE_ID_NOT_BY_CARD))
2169                         card->dev->dev_id = card->info.unique_id & 0xffff;
2170
2171                 if (!IS_VM_NIC(card)) {
2172                         card->dev->features |= NETIF_F_SG;
2173                         card->dev->hw_features |= NETIF_F_TSO |
2174                                 NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
2175                         card->dev->vlan_features |= NETIF_F_TSO |
2176                                 NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
2177                 }
2178
2179                 if (qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) {
2180                         card->dev->hw_features |= NETIF_F_IPV6_CSUM;
2181                         card->dev->vlan_features |= NETIF_F_IPV6_CSUM;
2182                 }
2183                 if (qeth_is_supported6(card, IPA_OUTBOUND_TSO)) {
2184                         card->dev->hw_features |= NETIF_F_TSO6;
2185                         card->dev->vlan_features |= NETIF_F_TSO6;
2186                 }
2187
2188                 /* allow for de-acceleration of NETIF_F_HW_VLAN_CTAG_TX: */
2189                 if (card->dev->hw_features & NETIF_F_TSO6)
2190                         headroom = sizeof(struct qeth_hdr_tso) + VLAN_HLEN;
2191                 else if (card->dev->hw_features & NETIF_F_TSO)
2192                         headroom = sizeof(struct qeth_hdr_tso);
2193                 else
2194                         headroom = sizeof(struct qeth_hdr) + VLAN_HLEN;
2195         } else if (IS_IQD(card)) {
2196                 card->dev->flags |= IFF_NOARP;
2197                 card->dev->netdev_ops = &qeth_l3_netdev_ops;
2198                 headroom = sizeof(struct qeth_hdr) - ETH_HLEN;
2199
2200                 rc = qeth_l3_iqd_read_initial_mac(card);
2201                 if (rc)
2202                         goto out;
2203         } else
2204                 return -ENODEV;
2205
2206         card->dev->needed_headroom = headroom;
2207         card->dev->features |=  NETIF_F_HW_VLAN_CTAG_TX |
2208                                 NETIF_F_HW_VLAN_CTAG_RX |
2209                                 NETIF_F_HW_VLAN_CTAG_FILTER;
2210
2211         netif_keep_dst(card->dev);
2212         if (card->dev->hw_features & (NETIF_F_TSO | NETIF_F_TSO6))
2213                 netif_set_gso_max_size(card->dev,
2214                                        PAGE_SIZE * (QETH_MAX_BUFFER_ELEMENTS(card) - 1));
2215
2216         netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT);
2217         rc = register_netdev(card->dev);
2218         if (!rc && carrier_ok)
2219                 netif_carrier_on(card->dev);
2220
2221 out:
2222         if (rc)
2223                 card->dev->netdev_ops = NULL;
2224         return rc;
2225 }
2226
2227 static const struct device_type qeth_l3_devtype = {
2228         .name = "qeth_layer3",
2229         .groups = qeth_l3_attr_groups,
2230 };
2231
2232 static int qeth_l3_probe_device(struct ccwgroup_device *gdev)
2233 {
2234         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
2235         int rc;
2236
2237         hash_init(card->ip_htable);
2238         mutex_init(&card->ip_lock);
2239         card->cmd_wq = alloc_ordered_workqueue("%s_cmd", 0,
2240                                                dev_name(&gdev->dev));
2241         if (!card->cmd_wq)
2242                 return -ENOMEM;
2243
2244         if (gdev->dev.type == &qeth_generic_devtype) {
2245                 rc = qeth_l3_create_device_attributes(&gdev->dev);
2246                 if (rc) {
2247                         destroy_workqueue(card->cmd_wq);
2248                         return rc;
2249                 }
2250         }
2251
2252         hash_init(card->ip_mc_htable);
2253         INIT_WORK(&card->rx_mode_work, qeth_l3_rx_mode_work);
2254         return 0;
2255 }
2256
2257 static void qeth_l3_remove_device(struct ccwgroup_device *cgdev)
2258 {
2259         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
2260
2261         if (cgdev->dev.type == &qeth_generic_devtype)
2262                 qeth_l3_remove_device_attributes(&cgdev->dev);
2263
2264         qeth_set_allowed_threads(card, 0, 1);
2265         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
2266
2267         if (cgdev->state == CCWGROUP_ONLINE)
2268                 qeth_l3_set_offline(cgdev);
2269
2270         cancel_work_sync(&card->close_dev_work);
2271         if (qeth_netdev_is_registered(card->dev))
2272                 unregister_netdev(card->dev);
2273
2274         flush_workqueue(card->cmd_wq);
2275         destroy_workqueue(card->cmd_wq);
2276         qeth_l3_clear_ip_htable(card, 0);
2277         qeth_l3_clear_ipato_list(card);
2278 }
2279
2280 static int qeth_l3_set_online(struct ccwgroup_device *gdev)
2281 {
2282         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
2283         struct net_device *dev = card->dev;
2284         int rc = 0;
2285         bool carrier_ok;
2286
2287         mutex_lock(&card->discipline_mutex);
2288         mutex_lock(&card->conf_mutex);
2289         QETH_CARD_TEXT(card, 2, "setonlin");
2290
2291         rc = qeth_core_hardsetup_card(card, &carrier_ok);
2292         if (rc) {
2293                 QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
2294                 rc = -ENODEV;
2295                 goto out_remove;
2296         }
2297
2298         card->state = CARD_STATE_HARDSETUP;
2299         qeth_print_status_message(card);
2300
2301         /* softsetup */
2302         QETH_CARD_TEXT(card, 2, "softsetp");
2303
2304         rc = qeth_l3_setadapter_parms(card);
2305         if (rc)
2306                 QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
2307         if (!card->options.sniffer) {
2308                 rc = qeth_l3_start_ipassists(card);
2309                 if (rc) {
2310                         QETH_CARD_TEXT_(card, 2, "3err%d", rc);
2311                         goto out_remove;
2312                 }
2313                 rc = qeth_l3_setrouting_v4(card);
2314                 if (rc)
2315                         QETH_CARD_TEXT_(card, 2, "4err%04x", rc);
2316                 rc = qeth_l3_setrouting_v6(card);
2317                 if (rc)
2318                         QETH_CARD_TEXT_(card, 2, "5err%04x", rc);
2319         }
2320
2321         rc = qeth_init_qdio_queues(card);
2322         if (rc) {
2323                 QETH_CARD_TEXT_(card, 2, "6err%d", rc);
2324                 rc = -ENODEV;
2325                 goto out_remove;
2326         }
2327         card->state = CARD_STATE_SOFTSETUP;
2328
2329         qeth_set_allowed_threads(card, 0xffffffff, 0);
2330         qeth_l3_recover_ip(card);
2331
2332         if (!qeth_netdev_is_registered(dev)) {
2333                 rc = qeth_l3_setup_netdev(card, carrier_ok);
2334                 if (rc)
2335                         goto out_remove;
2336         } else {
2337                 rtnl_lock();
2338                 if (carrier_ok)
2339                         netif_carrier_on(dev);
2340                 else
2341                         netif_carrier_off(dev);
2342
2343                 netif_device_attach(dev);
2344                 qeth_enable_hw_features(dev);
2345
2346                 if (card->info.open_when_online) {
2347                         card->info.open_when_online = 0;
2348                         dev_open(dev, NULL);
2349                 }
2350                 rtnl_unlock();
2351         }
2352         qeth_trace_features(card);
2353         /* let user_space know that device is online */
2354         kobject_uevent(&gdev->dev.kobj, KOBJ_CHANGE);
2355         mutex_unlock(&card->conf_mutex);
2356         mutex_unlock(&card->discipline_mutex);
2357         return 0;
2358 out_remove:
2359         qeth_l3_stop_card(card);
2360         ccw_device_set_offline(CARD_DDEV(card));
2361         ccw_device_set_offline(CARD_WDEV(card));
2362         ccw_device_set_offline(CARD_RDEV(card));
2363         qdio_free(CARD_DDEV(card));
2364
2365         mutex_unlock(&card->conf_mutex);
2366         mutex_unlock(&card->discipline_mutex);
2367         return rc;
2368 }
2369
2370 static int __qeth_l3_set_offline(struct ccwgroup_device *cgdev,
2371                         int recovery_mode)
2372 {
2373         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
2374         int rc = 0, rc2 = 0, rc3 = 0;
2375
2376         mutex_lock(&card->discipline_mutex);
2377         mutex_lock(&card->conf_mutex);
2378         QETH_CARD_TEXT(card, 3, "setoffl");
2379
2380         if ((!recovery_mode && card->info.hwtrap) || card->info.hwtrap == 2) {
2381                 qeth_hw_trap(card, QETH_DIAGS_TRAP_DISARM);
2382                 card->info.hwtrap = 1;
2383         }
2384
2385         rtnl_lock();
2386         card->info.open_when_online = card->dev->flags & IFF_UP;
2387         dev_close(card->dev);
2388         netif_device_detach(card->dev);
2389         netif_carrier_off(card->dev);
2390         rtnl_unlock();
2391
2392         qeth_l3_stop_card(card);
2393         if (card->options.cq == QETH_CQ_ENABLED) {
2394                 rtnl_lock();
2395                 call_netdevice_notifiers(NETDEV_REBOOT, card->dev);
2396                 rtnl_unlock();
2397         }
2398         rc  = ccw_device_set_offline(CARD_DDEV(card));
2399         rc2 = ccw_device_set_offline(CARD_WDEV(card));
2400         rc3 = ccw_device_set_offline(CARD_RDEV(card));
2401         if (!rc)
2402                 rc = (rc2) ? rc2 : rc3;
2403         if (rc)
2404                 QETH_CARD_TEXT_(card, 2, "1err%d", rc);
2405         qdio_free(CARD_DDEV(card));
2406
2407         /* let user_space know that device is offline */
2408         kobject_uevent(&cgdev->dev.kobj, KOBJ_CHANGE);
2409         mutex_unlock(&card->conf_mutex);
2410         mutex_unlock(&card->discipline_mutex);
2411         return 0;
2412 }
2413
2414 static int qeth_l3_set_offline(struct ccwgroup_device *cgdev)
2415 {
2416         return __qeth_l3_set_offline(cgdev, 0);
2417 }
2418
2419 static int qeth_l3_recover(void *ptr)
2420 {
2421         struct qeth_card *card;
2422         int rc = 0;
2423
2424         card = (struct qeth_card *) ptr;
2425         QETH_CARD_TEXT(card, 2, "recover1");
2426         QETH_CARD_HEX(card, 2, &card, sizeof(void *));
2427         if (!qeth_do_run_thread(card, QETH_RECOVER_THREAD))
2428                 return 0;
2429         QETH_CARD_TEXT(card, 2, "recover2");
2430         dev_warn(&card->gdev->dev,
2431                 "A recovery process has been started for the device\n");
2432         __qeth_l3_set_offline(card->gdev, 1);
2433         rc = qeth_l3_set_online(card->gdev);
2434         if (!rc)
2435                 dev_info(&card->gdev->dev,
2436                         "Device successfully recovered!\n");
2437         else {
2438                 ccwgroup_set_offline(card->gdev);
2439                 dev_warn(&card->gdev->dev, "The qeth device driver "
2440                                 "failed to recover an error on the device\n");
2441         }
2442         qeth_clear_thread_start_bit(card, QETH_RECOVER_THREAD);
2443         qeth_clear_thread_running_bit(card, QETH_RECOVER_THREAD);
2444         return 0;
2445 }
2446
2447 /* Returns zero if the command is successfully "consumed" */
2448 static int qeth_l3_control_event(struct qeth_card *card,
2449                                         struct qeth_ipa_cmd *cmd)
2450 {
2451         return 1;
2452 }
2453
2454 struct qeth_discipline qeth_l3_discipline = {
2455         .devtype = &qeth_l3_devtype,
2456         .process_rx_buffer = qeth_l3_process_inbound_buffer,
2457         .recover = qeth_l3_recover,
2458         .setup = qeth_l3_probe_device,
2459         .remove = qeth_l3_remove_device,
2460         .set_online = qeth_l3_set_online,
2461         .set_offline = qeth_l3_set_offline,
2462         .do_ioctl = qeth_l3_do_ioctl,
2463         .control_event_handler = qeth_l3_control_event,
2464 };
2465 EXPORT_SYMBOL_GPL(qeth_l3_discipline);
2466
2467 static int qeth_l3_handle_ip_event(struct qeth_card *card,
2468                                    struct qeth_ipaddr *addr,
2469                                    unsigned long event)
2470 {
2471         switch (event) {
2472         case NETDEV_UP:
2473                 qeth_l3_modify_ip(card, addr, true);
2474                 return NOTIFY_OK;
2475         case NETDEV_DOWN:
2476                 qeth_l3_modify_ip(card, addr, false);
2477                 return NOTIFY_OK;
2478         default:
2479                 return NOTIFY_DONE;
2480         }
2481 }
2482
2483 struct qeth_l3_ip_event_work {
2484         struct work_struct work;
2485         struct qeth_card *card;
2486         struct qeth_ipaddr addr;
2487 };
2488
2489 #define to_ip_work(w) container_of((w), struct qeth_l3_ip_event_work, work)
2490
2491 static void qeth_l3_add_ip_worker(struct work_struct *work)
2492 {
2493         struct qeth_l3_ip_event_work *ip_work = to_ip_work(work);
2494
2495         qeth_l3_modify_ip(ip_work->card, &ip_work->addr, true);
2496         kfree(work);
2497 }
2498
2499 static void qeth_l3_delete_ip_worker(struct work_struct *work)
2500 {
2501         struct qeth_l3_ip_event_work *ip_work = to_ip_work(work);
2502
2503         qeth_l3_modify_ip(ip_work->card, &ip_work->addr, false);
2504         kfree(work);
2505 }
2506
2507 static struct qeth_card *qeth_l3_get_card_from_dev(struct net_device *dev)
2508 {
2509         if (is_vlan_dev(dev))
2510                 dev = vlan_dev_real_dev(dev);
2511         if (dev->netdev_ops == &qeth_l3_osa_netdev_ops ||
2512             dev->netdev_ops == &qeth_l3_netdev_ops)
2513                 return (struct qeth_card *) dev->ml_priv;
2514         return NULL;
2515 }
2516
2517 static int qeth_l3_ip_event(struct notifier_block *this,
2518                             unsigned long event, void *ptr)
2519 {
2520
2521         struct in_ifaddr *ifa = (struct in_ifaddr *)ptr;
2522         struct net_device *dev = ifa->ifa_dev->dev;
2523         struct qeth_ipaddr addr;
2524         struct qeth_card *card;
2525
2526         if (dev_net(dev) != &init_net)
2527                 return NOTIFY_DONE;
2528
2529         card = qeth_l3_get_card_from_dev(dev);
2530         if (!card)
2531                 return NOTIFY_DONE;
2532         QETH_CARD_TEXT(card, 3, "ipevent");
2533
2534         qeth_l3_init_ipaddr(&addr, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV4);
2535         addr.u.a4.addr = ifa->ifa_address;
2536         addr.u.a4.mask = be32_to_cpu(ifa->ifa_mask);
2537
2538         return qeth_l3_handle_ip_event(card, &addr, event);
2539 }
2540
2541 static struct notifier_block qeth_l3_ip_notifier = {
2542         qeth_l3_ip_event,
2543         NULL,
2544 };
2545
2546 static int qeth_l3_ip6_event(struct notifier_block *this,
2547                              unsigned long event, void *ptr)
2548 {
2549         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
2550         struct net_device *dev = ifa->idev->dev;
2551         struct qeth_l3_ip_event_work *ip_work;
2552         struct qeth_card *card;
2553
2554         if (event != NETDEV_UP && event != NETDEV_DOWN)
2555                 return NOTIFY_DONE;
2556
2557         card = qeth_l3_get_card_from_dev(dev);
2558         if (!card)
2559                 return NOTIFY_DONE;
2560         QETH_CARD_TEXT(card, 3, "ip6event");
2561         if (!qeth_is_supported(card, IPA_IPV6))
2562                 return NOTIFY_DONE;
2563
2564         ip_work = kmalloc(sizeof(*ip_work), GFP_ATOMIC);
2565         if (!ip_work)
2566                 return NOTIFY_DONE;
2567
2568         if (event == NETDEV_UP)
2569                 INIT_WORK(&ip_work->work, qeth_l3_add_ip_worker);
2570         else
2571                 INIT_WORK(&ip_work->work, qeth_l3_delete_ip_worker);
2572
2573         ip_work->card = card;
2574         qeth_l3_init_ipaddr(&ip_work->addr, QETH_IP_TYPE_NORMAL,
2575                             QETH_PROT_IPV6);
2576         ip_work->addr.u.a6.addr = ifa->addr;
2577         ip_work->addr.u.a6.pfxlen = ifa->prefix_len;
2578
2579         queue_work(card->cmd_wq, &ip_work->work);
2580         return NOTIFY_OK;
2581 }
2582
2583 static struct notifier_block qeth_l3_ip6_notifier = {
2584         qeth_l3_ip6_event,
2585         NULL,
2586 };
2587
2588 static int qeth_l3_register_notifiers(void)
2589 {
2590         int rc;
2591
2592         QETH_DBF_TEXT(SETUP, 5, "regnotif");
2593         rc = register_inetaddr_notifier(&qeth_l3_ip_notifier);
2594         if (rc)
2595                 return rc;
2596         rc = register_inet6addr_notifier(&qeth_l3_ip6_notifier);
2597         if (rc) {
2598                 unregister_inetaddr_notifier(&qeth_l3_ip_notifier);
2599                 return rc;
2600         }
2601         return 0;
2602 }
2603
2604 static void qeth_l3_unregister_notifiers(void)
2605 {
2606         QETH_DBF_TEXT(SETUP, 5, "unregnot");
2607         WARN_ON(unregister_inetaddr_notifier(&qeth_l3_ip_notifier));
2608         WARN_ON(unregister_inet6addr_notifier(&qeth_l3_ip6_notifier));
2609 }
2610
2611 static int __init qeth_l3_init(void)
2612 {
2613         pr_info("register layer 3 discipline\n");
2614         return qeth_l3_register_notifiers();
2615 }
2616
2617 static void __exit qeth_l3_exit(void)
2618 {
2619         qeth_l3_unregister_notifiers();
2620         pr_info("unregister layer 3 discipline\n");
2621 }
2622
2623 module_init(qeth_l3_init);
2624 module_exit(qeth_l3_exit);
2625 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
2626 MODULE_DESCRIPTION("qeth layer 3 discipline");
2627 MODULE_LICENSE("GPL");