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 static int qeth_l3_register_addr_entry(struct qeth_card *,
  41                 struct qeth_ipaddr *);
  42 static int qeth_l3_deregister_addr_entry(struct qeth_card *,
  43                 struct qeth_ipaddr *);
  44
  45 int qeth_l3_ipaddr_to_string(enum qeth_prot_versions proto, const u8 *addr,
  46                              char *buf)
  47 {
  48         if (proto == QETH_PROT_IPV4)
  49                 return sprintf(buf, "%pI4", addr);
  50         else
  51                 return sprintf(buf, "%pI6", addr);
  52 }
  53
  54 static struct qeth_ipaddr *qeth_l3_find_addr_by_ip(struct qeth_card *card,
  55                                                    struct qeth_ipaddr *query)
  56 {
  57         u32 key = qeth_l3_ipaddr_hash(query);
  58         struct qeth_ipaddr *addr;
  59
  60         if (query->is_multicast) {
  61                 hash_for_each_possible(card->rx_mode_addrs, addr, hnode, key)
  62                         if (qeth_l3_addr_match_ip(addr, query))
  63                                 return addr;
  64         } else {
  65                 hash_for_each_possible(card->ip_htable,  addr, hnode, key)
  66                         if (qeth_l3_addr_match_ip(addr, query))
  67                                 return addr;
  68         }
  69         return NULL;
  70 }
  71
  72 static void qeth_l3_convert_addr_to_bits(u8 *addr, u8 *bits, int len)
  73 {
  74         int i, j;
  75         u8 octet;
  76
  77         for (i = 0; i < len; ++i) {
  78                 octet = addr[i];
  79                 for (j = 7; j >= 0; --j) {
  80                         bits[i*8 + j] = octet & 1;
  81                         octet >>= 1;
  82                 }
  83         }
  84 }
  85
  86 static bool qeth_l3_is_addr_covered_by_ipato(struct qeth_card *card,
  87                                              struct qeth_ipaddr *addr)
  88 {
  89         struct qeth_ipato_entry *ipatoe;
  90         u8 addr_bits[128] = {0, };
  91         u8 ipatoe_bits[128] = {0, };
  92         int rc = 0;
  93
  94         if (!card->ipato.enabled)
  95                 return false;
  96         if (addr->type != QETH_IP_TYPE_NORMAL)
  97                 return false;
  98
  99         qeth_l3_convert_addr_to_bits((u8 *) &addr->u, addr_bits,
 100                                      (addr->proto == QETH_PROT_IPV4) ? 4 : 16);
 101         list_for_each_entry(ipatoe, &card->ipato.entries, entry) {
 102                 if (addr->proto != ipatoe->proto)
 103                         continue;
 104                 qeth_l3_convert_addr_to_bits(ipatoe->addr, ipatoe_bits,
 105                                           (ipatoe->proto == QETH_PROT_IPV4) ?
 106                                           4 : 16);
 107                 rc = !memcmp(addr_bits, ipatoe_bits, ipatoe->mask_bits);
 108                 if (rc)
 109                         break;
 110         }
 111         /* invert? */
 112         if ((addr->proto == QETH_PROT_IPV4) && card->ipato.invert4)
 113                 rc = !rc;
 114         else if ((addr->proto == QETH_PROT_IPV6) && card->ipato.invert6)
 115                 rc = !rc;
 116
 117         return rc;
 118 }
 119
 120 static int qeth_l3_delete_ip(struct qeth_card *card,
 121                              struct qeth_ipaddr *tmp_addr)
 122 {
 123         int rc = 0;
 124         struct qeth_ipaddr *addr;
 125
 126         if (tmp_addr->type == QETH_IP_TYPE_RXIP)
 127                 QETH_CARD_TEXT(card, 2, "delrxip");
 128         else if (tmp_addr->type == QETH_IP_TYPE_VIPA)
 129                 QETH_CARD_TEXT(card, 2, "delvipa");
 130         else
 131                 QETH_CARD_TEXT(card, 2, "delip");
 132
 133         if (tmp_addr->proto == QETH_PROT_IPV4)
 134                 QETH_CARD_HEX(card, 4, &tmp_addr->u.a4.addr, 4);
 135         else {
 136                 QETH_CARD_HEX(card, 4, &tmp_addr->u.a6.addr, 8);
 137                 QETH_CARD_HEX(card, 4, ((char *)&tmp_addr->u.a6.addr) + 8, 8);
 138         }
 139
 140         addr = qeth_l3_find_addr_by_ip(card, tmp_addr);
 141         if (!addr || !qeth_l3_addr_match_all(addr, tmp_addr))
 142                 return -ENOENT;
 143
 144         addr->ref_counter--;
 145         if (addr->type == QETH_IP_TYPE_NORMAL && addr->ref_counter > 0)
 146                 return rc;
 147
 148         if (qeth_card_hw_is_reachable(card))
 149                 rc = qeth_l3_deregister_addr_entry(card, addr);
 150
 151         hash_del(&addr->hnode);
 152         kfree(addr);
 153
 154         return rc;
 155 }
 156
 157 static int qeth_l3_add_ip(struct qeth_card *card, struct qeth_ipaddr *tmp_addr)
 158 {
 159         int rc = 0;
 160         struct qeth_ipaddr *addr;
 161         char buf[40];
 162
 163         if (tmp_addr->type == QETH_IP_TYPE_RXIP)
 164                 QETH_CARD_TEXT(card, 2, "addrxip");
 165         else if (tmp_addr->type == QETH_IP_TYPE_VIPA)
 166                 QETH_CARD_TEXT(card, 2, "addvipa");
 167         else
 168                 QETH_CARD_TEXT(card, 2, "addip");
 169
 170         if (tmp_addr->proto == QETH_PROT_IPV4)
 171                 QETH_CARD_HEX(card, 4, &tmp_addr->u.a4.addr, 4);
 172         else {
 173                 QETH_CARD_HEX(card, 4, &tmp_addr->u.a6.addr, 8);
 174                 QETH_CARD_HEX(card, 4, ((char *)&tmp_addr->u.a6.addr) + 8, 8);
 175         }
 176
 177         addr = qeth_l3_find_addr_by_ip(card, tmp_addr);
 178         if (addr) {
 179                 if (tmp_addr->type != QETH_IP_TYPE_NORMAL)
 180                         return -EADDRINUSE;
 181                 if (qeth_l3_addr_match_all(addr, tmp_addr)) {
 182                         addr->ref_counter++;
 183                         return 0;
 184                 }
 185                 qeth_l3_ipaddr_to_string(tmp_addr->proto, (u8 *)&tmp_addr->u,
 186                                          buf);
 187                 dev_warn(&card->gdev->dev,
 188                          "Registering IP address %s failed\n", buf);
 189                 return -EADDRINUSE;
 190         } else {
 191                 addr = kmemdup(tmp_addr, sizeof(*tmp_addr), GFP_KERNEL);
 192                 if (!addr)
 193                         return -ENOMEM;
 194
 195                 if (qeth_l3_is_addr_covered_by_ipato(card, addr)) {
 196                         QETH_CARD_TEXT(card, 2, "tkovaddr");
 197                         addr->ipato = 1;
 198                 }
 199                 hash_add(card->ip_htable, &addr->hnode,
 200                                 qeth_l3_ipaddr_hash(addr));
 201
 202                 if (!qeth_card_hw_is_reachable(card)) {
 203                         addr->disp_flag = QETH_DISP_ADDR_ADD;
 204                         return 0;
 205                 }
 206
 207                 rc = qeth_l3_register_addr_entry(card, addr);
 208
 209                 if (!rc || rc == -EADDRINUSE || rc == -ENETDOWN) {
 210                         addr->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
 211                 } else {
 212                         hash_del(&addr->hnode);
 213                         kfree(addr);
 214                 }
 215         }
 216         return rc;
 217 }
 218
 219 static int qeth_l3_modify_ip(struct qeth_card *card, struct qeth_ipaddr *addr,
 220                              bool add)
 221 {
 222         int rc;
 223
 224         mutex_lock(&card->ip_lock);
 225         rc = add ? qeth_l3_add_ip(card, addr) : qeth_l3_delete_ip(card, addr);
 226         mutex_unlock(&card->ip_lock);
 227
 228         return rc;
 229 }
 230
 231 static void qeth_l3_drain_rx_mode_cache(struct qeth_card *card)
 232 {
 233         struct qeth_ipaddr *addr;
 234         struct hlist_node *tmp;
 235         int i;
 236
 237         hash_for_each_safe(card->rx_mode_addrs, i, tmp, addr, hnode) {
 238                 hash_del(&addr->hnode);
 239                 kfree(addr);
 240         }
 241 }
 242
 243 static void qeth_l3_clear_ip_htable(struct qeth_card *card, int recover)
 244 {
 245         struct qeth_ipaddr *addr;
 246         struct hlist_node *tmp;
 247         int i;
 248
 249         QETH_CARD_TEXT(card, 4, "clearip");
 250
 251         mutex_lock(&card->ip_lock);
 252
 253         hash_for_each_safe(card->ip_htable, i, tmp, addr, hnode) {
 254                 if (!recover) {
 255                         hash_del(&addr->hnode);
 256                         kfree(addr);
 257                         continue;
 258                 }
 259                 addr->disp_flag = QETH_DISP_ADDR_ADD;
 260         }
 261
 262         mutex_unlock(&card->ip_lock);
 263 }
 264
 265 static void qeth_l3_recover_ip(struct qeth_card *card)
 266 {
 267         struct qeth_ipaddr *addr;
 268         struct hlist_node *tmp;
 269         int i;
 270         int rc;
 271
 272         QETH_CARD_TEXT(card, 4, "recovrip");
 273
 274         mutex_lock(&card->ip_lock);
 275
 276         hash_for_each_safe(card->ip_htable, i, tmp, addr, hnode) {
 277                 if (addr->disp_flag == QETH_DISP_ADDR_ADD) {
 278                         rc = qeth_l3_register_addr_entry(card, addr);
 279
 280                         if (!rc) {
 281                                 addr->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
 282                         } else {
 283                                 hash_del(&addr->hnode);
 284                                 kfree(addr);
 285                         }
 286                 }
 287         }
 288
 289         mutex_unlock(&card->ip_lock);
 290 }
 291
 292 static int qeth_l3_setdelip_cb(struct qeth_card *card, struct qeth_reply *reply,
 293                                unsigned long data)
 294 {
 295         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
 296
 297         switch (cmd->hdr.return_code) {
 298         case IPA_RC_SUCCESS:
 299                 return 0;
 300         case IPA_RC_DUPLICATE_IP_ADDRESS:
 301                 return -EADDRINUSE;
 302         case IPA_RC_MC_ADDR_NOT_FOUND:
 303                 return -ENOENT;
 304         case IPA_RC_LAN_OFFLINE:
 305                 return -ENETDOWN;
 306         default:
 307                 return -EIO;
 308         }
 309 }
 310
 311 static int qeth_l3_send_setdelmc(struct qeth_card *card,
 312                                  struct qeth_ipaddr *addr,
 313                                  enum qeth_ipa_cmds ipacmd)
 314 {
 315         struct qeth_cmd_buffer *iob;
 316         struct qeth_ipa_cmd *cmd;
 317
 318         QETH_CARD_TEXT(card, 4, "setdelmc");
 319
 320         iob = qeth_ipa_alloc_cmd(card, ipacmd, addr->proto,
 321                                  IPA_DATA_SIZEOF(setdelipm));
 322         if (!iob)
 323                 return -ENOMEM;
 324         cmd = __ipa_cmd(iob);
 325         if (addr->proto == QETH_PROT_IPV6) {
 326                 cmd->data.setdelipm.ip = addr->u.a6.addr;
 327                 ipv6_eth_mc_map(&addr->u.a6.addr, cmd->data.setdelipm.mac);
 328         } else {
 329                 cmd->data.setdelipm.ip.s6_addr32[3] = addr->u.a4.addr;
 330                 ip_eth_mc_map(addr->u.a4.addr, cmd->data.setdelipm.mac);
 331         }
 332
 333         return qeth_send_ipa_cmd(card, iob, qeth_l3_setdelip_cb, NULL);
 334 }
 335
 336 static void qeth_l3_set_ipv6_prefix(struct in6_addr *prefix, unsigned int len)
 337 {
 338         unsigned int i = 0;
 339
 340         while (len && i < 4) {
 341                 int mask_len = min_t(int, len, 32);
 342
 343                 prefix->s6_addr32[i] = inet_make_mask(mask_len);
 344                 len -= mask_len;
 345                 i++;
 346         }
 347 }
 348
 349 static u32 qeth_l3_get_setdelip_flags(struct qeth_ipaddr *addr, bool set)
 350 {
 351         switch (addr->type) {
 352         case QETH_IP_TYPE_RXIP:
 353                 return (set) ? QETH_IPA_SETIP_TAKEOVER_FLAG : 0;
 354         case QETH_IP_TYPE_VIPA:
 355                 return (set) ? QETH_IPA_SETIP_VIPA_FLAG :
 356                                QETH_IPA_DELIP_VIPA_FLAG;
 357         default:
 358                 return (set && addr->ipato) ? QETH_IPA_SETIP_TAKEOVER_FLAG : 0;
 359         }
 360 }
 361
 362 static int qeth_l3_send_setdelip(struct qeth_card *card,
 363                                  struct qeth_ipaddr *addr,
 364                                  enum qeth_ipa_cmds ipacmd)
 365 {
 366         struct qeth_cmd_buffer *iob;
 367         struct qeth_ipa_cmd *cmd;
 368         u32 flags;
 369
 370         QETH_CARD_TEXT(card, 4, "setdelip");
 371
 372         iob = qeth_ipa_alloc_cmd(card, ipacmd, addr->proto,
 373                                  IPA_DATA_SIZEOF(setdelip6));
 374         if (!iob)
 375                 return -ENOMEM;
 376         cmd = __ipa_cmd(iob);
 377
 378         flags = qeth_l3_get_setdelip_flags(addr, ipacmd == IPA_CMD_SETIP);
 379         QETH_CARD_TEXT_(card, 4, "flags%02X", flags);
 380
 381         if (addr->proto == QETH_PROT_IPV6) {
 382                 cmd->data.setdelip6.addr = addr->u.a6.addr;
 383                 qeth_l3_set_ipv6_prefix(&cmd->data.setdelip6.prefix,
 384                                         addr->u.a6.pfxlen);
 385                 cmd->data.setdelip6.flags = flags;
 386         } else {
 387                 cmd->data.setdelip4.addr = addr->u.a4.addr;
 388                 cmd->data.setdelip4.mask = addr->u.a4.mask;
 389                 cmd->data.setdelip4.flags = flags;
 390         }
 391
 392         return qeth_send_ipa_cmd(card, iob, qeth_l3_setdelip_cb, NULL);
 393 }
 394
 395 static int qeth_l3_send_setrouting(struct qeth_card *card,
 396         enum qeth_routing_types type, enum qeth_prot_versions prot)
 397 {
 398         int rc;
 399         struct qeth_ipa_cmd *cmd;
 400         struct qeth_cmd_buffer *iob;
 401
 402         QETH_CARD_TEXT(card, 4, "setroutg");
 403         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_SETRTG, prot,
 404                                  IPA_DATA_SIZEOF(setrtg));
 405         if (!iob)
 406                 return -ENOMEM;
 407         cmd = __ipa_cmd(iob);
 408         cmd->data.setrtg.type = (type);
 409         rc = qeth_send_ipa_cmd(card, iob, NULL, NULL);
 410
 411         return rc;
 412 }
 413
 414 static int qeth_l3_correct_routing_type(struct qeth_card *card,
 415                 enum qeth_routing_types *type, enum qeth_prot_versions prot)
 416 {
 417         if (IS_IQD(card)) {
 418                 switch (*type) {
 419                 case NO_ROUTER:
 420                 case PRIMARY_CONNECTOR:
 421                 case SECONDARY_CONNECTOR:
 422                 case MULTICAST_ROUTER:
 423                         return 0;
 424                 default:
 425                         goto out_inval;
 426                 }
 427         } else {
 428                 switch (*type) {
 429                 case NO_ROUTER:
 430                 case PRIMARY_ROUTER:
 431                 case SECONDARY_ROUTER:
 432                         return 0;
 433                 case MULTICAST_ROUTER:
 434                         if (qeth_is_ipafunc_supported(card, prot,
 435                                                       IPA_OSA_MC_ROUTER))
 436                                 return 0;
 437                 default:
 438                         goto out_inval;
 439                 }
 440         }
 441 out_inval:
 442         *type = NO_ROUTER;
 443         return -EINVAL;
 444 }
 445
 446 int qeth_l3_setrouting_v4(struct qeth_card *card)
 447 {
 448         int rc;
 449
 450         QETH_CARD_TEXT(card, 3, "setrtg4");
 451
 452         rc = qeth_l3_correct_routing_type(card, &card->options.route4.type,
 453                                   QETH_PROT_IPV4);
 454         if (rc)
 455                 return rc;
 456
 457         rc = qeth_l3_send_setrouting(card, card->options.route4.type,
 458                                   QETH_PROT_IPV4);
 459         if (rc) {
 460                 card->options.route4.type = NO_ROUTER;
 461                 QETH_DBF_MESSAGE(2, "Error (%#06x) while setting routing type on device %x. Type set to 'no router'.\n",
 462                                  rc, CARD_DEVID(card));
 463         }
 464         return rc;
 465 }
 466
 467 int qeth_l3_setrouting_v6(struct qeth_card *card)
 468 {
 469         int rc = 0;
 470
 471         QETH_CARD_TEXT(card, 3, "setrtg6");
 472
 473         if (!qeth_is_supported(card, IPA_IPV6))
 474                 return 0;
 475         rc = qeth_l3_correct_routing_type(card, &card->options.route6.type,
 476                                   QETH_PROT_IPV6);
 477         if (rc)
 478                 return rc;
 479
 480         rc = qeth_l3_send_setrouting(card, card->options.route6.type,
 481                                   QETH_PROT_IPV6);
 482         if (rc) {
 483                 card->options.route6.type = NO_ROUTER;
 484                 QETH_DBF_MESSAGE(2, "Error (%#06x) while setting routing type on device %x. Type set to 'no router'.\n",
 485                                  rc, CARD_DEVID(card));
 486         }
 487         return rc;
 488 }
 489
 490 /*
 491  * IP address takeover related functions
 492  */
 493
 494 /**
 495  * qeth_l3_update_ipato() - Update 'takeover' property, for all NORMAL IPs.
 496  *
 497  * Caller must hold ip_lock.
 498  */
 499 void qeth_l3_update_ipato(struct qeth_card *card)
 500 {
 501         struct qeth_ipaddr *addr;
 502         unsigned int i;
 503
 504         hash_for_each(card->ip_htable, i, addr, hnode) {
 505                 if (addr->type != QETH_IP_TYPE_NORMAL)
 506                         continue;
 507                 addr->ipato = qeth_l3_is_addr_covered_by_ipato(card, addr);
 508         }
 509 }
 510
 511 static void qeth_l3_clear_ipato_list(struct qeth_card *card)
 512 {
 513         struct qeth_ipato_entry *ipatoe, *tmp;
 514
 515         mutex_lock(&card->ip_lock);
 516
 517         list_for_each_entry_safe(ipatoe, tmp, &card->ipato.entries, entry) {
 518                 list_del(&ipatoe->entry);
 519                 kfree(ipatoe);
 520         }
 521
 522         qeth_l3_update_ipato(card);
 523         mutex_unlock(&card->ip_lock);
 524 }
 525
 526 int qeth_l3_add_ipato_entry(struct qeth_card *card,
 527                                 struct qeth_ipato_entry *new)
 528 {
 529         struct qeth_ipato_entry *ipatoe;
 530         int rc = 0;
 531
 532         QETH_CARD_TEXT(card, 2, "addipato");
 533
 534         mutex_lock(&card->ip_lock);
 535
 536         list_for_each_entry(ipatoe, &card->ipato.entries, entry) {
 537                 if (ipatoe->proto != new->proto)
 538                         continue;
 539                 if (!memcmp(ipatoe->addr, new->addr,
 540                             (ipatoe->proto == QETH_PROT_IPV4) ? 4 : 16) &&
 541                     (ipatoe->mask_bits == new->mask_bits)) {
 542                         rc = -EEXIST;
 543                         break;
 544                 }
 545         }
 546
 547         if (!rc) {
 548                 list_add_tail(&new->entry, &card->ipato.entries);
 549                 qeth_l3_update_ipato(card);
 550         }
 551
 552         mutex_unlock(&card->ip_lock);
 553
 554         return rc;
 555 }
 556
 557 int qeth_l3_del_ipato_entry(struct qeth_card *card,
 558                             enum qeth_prot_versions proto, u8 *addr,
 559                             unsigned int mask_bits)
 560 {
 561         struct qeth_ipato_entry *ipatoe, *tmp;
 562         int rc = -ENOENT;
 563
 564         QETH_CARD_TEXT(card, 2, "delipato");
 565
 566         mutex_lock(&card->ip_lock);
 567
 568         list_for_each_entry_safe(ipatoe, tmp, &card->ipato.entries, entry) {
 569                 if (ipatoe->proto != proto)
 570                         continue;
 571                 if (!memcmp(ipatoe->addr, addr,
 572                             (proto == QETH_PROT_IPV4) ? 4 : 16) &&
 573                     (ipatoe->mask_bits == mask_bits)) {
 574                         list_del(&ipatoe->entry);
 575                         qeth_l3_update_ipato(card);
 576                         kfree(ipatoe);
 577                         rc = 0;
 578                 }
 579         }
 580
 581         mutex_unlock(&card->ip_lock);
 582
 583         return rc;
 584 }
 585
 586 int qeth_l3_modify_rxip_vipa(struct qeth_card *card, bool add, const u8 *ip,
 587                              enum qeth_ip_types type,
 588                              enum qeth_prot_versions proto)
 589 {
 590         struct qeth_ipaddr addr;
 591
 592         qeth_l3_init_ipaddr(&addr, type, proto);
 593         if (proto == QETH_PROT_IPV4)
 594                 memcpy(&addr.u.a4.addr, ip, 4);
 595         else
 596                 memcpy(&addr.u.a6.addr, ip, 16);
 597
 598         return qeth_l3_modify_ip(card, &addr, add);
 599 }
 600
 601 int qeth_l3_modify_hsuid(struct qeth_card *card, bool add)
 602 {
 603         struct qeth_ipaddr addr;
 604         unsigned int i;
 605
 606         qeth_l3_init_ipaddr(&addr, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV6);
 607         addr.u.a6.addr.s6_addr[0] = 0xfe;
 608         addr.u.a6.addr.s6_addr[1] = 0x80;
 609         for (i = 0; i < 8; i++)
 610                 addr.u.a6.addr.s6_addr[8+i] = card->options.hsuid[i];
 611
 612         return qeth_l3_modify_ip(card, &addr, add);
 613 }
 614
 615 static int qeth_l3_register_addr_entry(struct qeth_card *card,
 616                                 struct qeth_ipaddr *addr)
 617 {
 618         char buf[50];
 619         int rc = 0;
 620         int cnt = 3;
 621
 622         if (card->options.sniffer)
 623                 return 0;
 624
 625         if (addr->proto == QETH_PROT_IPV4) {
 626                 QETH_CARD_TEXT(card, 2, "setaddr4");
 627                 QETH_CARD_HEX(card, 3, &addr->u.a4.addr, sizeof(int));
 628         } else if (addr->proto == QETH_PROT_IPV6) {
 629                 QETH_CARD_TEXT(card, 2, "setaddr6");
 630                 QETH_CARD_HEX(card, 3, &addr->u.a6.addr, 8);
 631                 QETH_CARD_HEX(card, 3, ((char *)&addr->u.a6.addr) + 8, 8);
 632         } else {
 633                 QETH_CARD_TEXT(card, 2, "setaddr?");
 634                 QETH_CARD_HEX(card, 3, addr, sizeof(struct qeth_ipaddr));
 635         }
 636         do {
 637                 if (addr->is_multicast)
 638                         rc =  qeth_l3_send_setdelmc(card, addr, IPA_CMD_SETIPM);
 639                 else
 640                         rc = qeth_l3_send_setdelip(card, addr, IPA_CMD_SETIP);
 641                 if (rc)
 642                         QETH_CARD_TEXT(card, 2, "failed");
 643         } while ((--cnt > 0) && rc);
 644         if (rc) {
 645                 QETH_CARD_TEXT(card, 2, "FAILED");
 646                 qeth_l3_ipaddr_to_string(addr->proto, (u8 *)&addr->u, buf);
 647                 dev_warn(&card->gdev->dev,
 648                         "Registering IP address %s failed\n", buf);
 649         }
 650         return rc;
 651 }
 652
 653 static int qeth_l3_deregister_addr_entry(struct qeth_card *card,
 654                                                 struct qeth_ipaddr *addr)
 655 {
 656         int rc = 0;
 657
 658         if (card->options.sniffer)
 659                 return 0;
 660
 661         if (addr->proto == QETH_PROT_IPV4) {
 662                 QETH_CARD_TEXT(card, 2, "deladdr4");
 663                 QETH_CARD_HEX(card, 3, &addr->u.a4.addr, sizeof(int));
 664         } else if (addr->proto == QETH_PROT_IPV6) {
 665                 QETH_CARD_TEXT(card, 2, "deladdr6");
 666                 QETH_CARD_HEX(card, 3, &addr->u.a6.addr, 8);
 667                 QETH_CARD_HEX(card, 3, ((char *)&addr->u.a6.addr) + 8, 8);
 668         } else {
 669                 QETH_CARD_TEXT(card, 2, "deladdr?");
 670                 QETH_CARD_HEX(card, 3, addr, sizeof(struct qeth_ipaddr));
 671         }
 672         if (addr->is_multicast)
 673                 rc = qeth_l3_send_setdelmc(card, addr, IPA_CMD_DELIPM);
 674         else
 675                 rc = qeth_l3_send_setdelip(card, addr, IPA_CMD_DELIP);
 676         if (rc)
 677                 QETH_CARD_TEXT(card, 2, "failed");
 678
 679         return rc;
 680 }
 681
 682 static int qeth_l3_setadapter_parms(struct qeth_card *card)
 683 {
 684         int rc = 0;
 685
 686         QETH_CARD_TEXT(card, 2, "setadprm");
 687
 688         if (qeth_adp_supported(card, IPA_SETADP_ALTER_MAC_ADDRESS)) {
 689                 rc = qeth_setadpparms_change_macaddr(card);
 690                 if (rc)
 691                         dev_warn(&card->gdev->dev, "Reading the adapter MAC"
 692                                 " address failed\n");
 693         }
 694
 695         return rc;
 696 }
 697
 698 static int qeth_l3_start_ipa_arp_processing(struct qeth_card *card)
 699 {
 700         int rc;
 701
 702         QETH_CARD_TEXT(card, 3, "ipaarp");
 703
 704         if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
 705                 dev_info(&card->gdev->dev,
 706                          "ARP processing not supported on %s!\n",
 707                          netdev_name(card->dev));
 708                 return 0;
 709         }
 710         rc = qeth_send_simple_setassparms(card, IPA_ARP_PROCESSING,
 711                                           IPA_CMD_ASS_START, NULL);
 712         if (rc) {
 713                 dev_warn(&card->gdev->dev,
 714                          "Starting ARP processing support for %s failed\n",
 715                          netdev_name(card->dev));
 716         }
 717         return rc;
 718 }
 719
 720 static int qeth_l3_start_ipa_source_mac(struct qeth_card *card)
 721 {
 722         int rc;
 723
 724         QETH_CARD_TEXT(card, 3, "stsrcmac");
 725
 726         if (!qeth_is_supported(card, IPA_SOURCE_MAC)) {
 727                 dev_info(&card->gdev->dev,
 728                          "Inbound source MAC-address not supported on %s\n",
 729                          netdev_name(card->dev));
 730                 return -EOPNOTSUPP;
 731         }
 732
 733         rc = qeth_send_simple_setassparms(card, IPA_SOURCE_MAC,
 734                                           IPA_CMD_ASS_START, NULL);
 735         if (rc)
 736                 dev_warn(&card->gdev->dev,
 737                          "Starting source MAC-address support for %s failed\n",
 738                          netdev_name(card->dev));
 739         return rc;
 740 }
 741
 742 static int qeth_l3_start_ipa_vlan(struct qeth_card *card)
 743 {
 744         int rc = 0;
 745
 746         QETH_CARD_TEXT(card, 3, "strtvlan");
 747
 748         if (!qeth_is_supported(card, IPA_FULL_VLAN)) {
 749                 dev_info(&card->gdev->dev,
 750                          "VLAN not supported on %s\n", netdev_name(card->dev));
 751                 return -EOPNOTSUPP;
 752         }
 753
 754         rc = qeth_send_simple_setassparms(card, IPA_VLAN_PRIO,
 755                                           IPA_CMD_ASS_START, NULL);
 756         if (rc) {
 757                 dev_warn(&card->gdev->dev,
 758                          "Starting VLAN support for %s failed\n",
 759                          netdev_name(card->dev));
 760         } else {
 761                 dev_info(&card->gdev->dev, "VLAN enabled\n");
 762         }
 763         return rc;
 764 }
 765
 766 static int qeth_l3_start_ipa_multicast(struct qeth_card *card)
 767 {
 768         int rc;
 769
 770         QETH_CARD_TEXT(card, 3, "stmcast");
 771
 772         if (!qeth_is_supported(card, IPA_MULTICASTING)) {
 773                 dev_info(&card->gdev->dev,
 774                          "Multicast not supported on %s\n",
 775                          netdev_name(card->dev));
 776                 return -EOPNOTSUPP;
 777         }
 778
 779         rc = qeth_send_simple_setassparms(card, IPA_MULTICASTING,
 780                                           IPA_CMD_ASS_START, NULL);
 781         if (rc) {
 782                 dev_warn(&card->gdev->dev,
 783                          "Starting multicast support for %s failed\n",
 784                          netdev_name(card->dev));
 785         } else {
 786                 dev_info(&card->gdev->dev, "Multicast enabled\n");
 787                 card->dev->flags |= IFF_MULTICAST;
 788         }
 789         return rc;
 790 }
 791
 792 static int qeth_l3_softsetup_ipv6(struct qeth_card *card)
 793 {
 794         u32 ipv6_data = 3;
 795         int rc;
 796
 797         QETH_CARD_TEXT(card, 3, "softipv6");
 798
 799         if (IS_IQD(card))
 800                 goto out;
 801
 802         rc = qeth_send_simple_setassparms(card, IPA_IPV6, IPA_CMD_ASS_START,
 803                                           &ipv6_data);
 804         if (rc) {
 805                 dev_err(&card->gdev->dev,
 806                         "Activating IPv6 support for %s failed\n",
 807                         netdev_name(card->dev));
 808                 return rc;
 809         }
 810         rc = qeth_send_simple_setassparms_v6(card, IPA_IPV6, IPA_CMD_ASS_START,
 811                                              NULL);
 812         if (rc) {
 813                 dev_err(&card->gdev->dev,
 814                         "Activating IPv6 support for %s failed\n",
 815                          netdev_name(card->dev));
 816                 return rc;
 817         }
 818         rc = qeth_send_simple_setassparms_v6(card, IPA_PASSTHRU,
 819                                              IPA_CMD_ASS_START, NULL);
 820         if (rc) {
 821                 dev_warn(&card->gdev->dev,
 822                          "Enabling the passthrough mode for %s failed\n",
 823                          netdev_name(card->dev));
 824                 return rc;
 825         }
 826 out:
 827         dev_info(&card->gdev->dev, "IPV6 enabled\n");
 828         return 0;
 829 }
 830
 831 static int qeth_l3_start_ipa_ipv6(struct qeth_card *card)
 832 {
 833         QETH_CARD_TEXT(card, 3, "strtipv6");
 834
 835         if (!qeth_is_supported(card, IPA_IPV6)) {
 836                 dev_info(&card->gdev->dev,
 837                          "IPv6 not supported on %s\n", netdev_name(card->dev));
 838                 return 0;
 839         }
 840         return qeth_l3_softsetup_ipv6(card);
 841 }
 842
 843 static int qeth_l3_start_ipa_broadcast(struct qeth_card *card)
 844 {
 845         u32 filter_data = 1;
 846         int rc;
 847
 848         QETH_CARD_TEXT(card, 3, "stbrdcst");
 849         card->info.broadcast_capable = 0;
 850         if (!qeth_is_supported(card, IPA_FILTERING)) {
 851                 dev_info(&card->gdev->dev,
 852                          "Broadcast not supported on %s\n",
 853                          netdev_name(card->dev));
 854                 rc = -EOPNOTSUPP;
 855                 goto out;
 856         }
 857         rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
 858                                           IPA_CMD_ASS_START, NULL);
 859         if (rc) {
 860                 dev_warn(&card->gdev->dev,
 861                          "Enabling broadcast filtering for %s failed\n",
 862                          netdev_name(card->dev));
 863                 goto out;
 864         }
 865
 866         rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
 867                                           IPA_CMD_ASS_CONFIGURE, &filter_data);
 868         if (rc) {
 869                 dev_warn(&card->gdev->dev,
 870                          "Setting up broadcast filtering for %s failed\n",
 871                          netdev_name(card->dev));
 872                 goto out;
 873         }
 874         card->info.broadcast_capable = QETH_BROADCAST_WITH_ECHO;
 875         dev_info(&card->gdev->dev, "Broadcast enabled\n");
 876         rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
 877                                           IPA_CMD_ASS_ENABLE, &filter_data);
 878         if (rc) {
 879                 dev_warn(&card->gdev->dev,
 880                          "Setting up broadcast echo filtering for %s failed\n",
 881                          netdev_name(card->dev));
 882                 goto out;
 883         }
 884         card->info.broadcast_capable = QETH_BROADCAST_WITHOUT_ECHO;
 885 out:
 886         if (card->info.broadcast_capable)
 887                 card->dev->flags |= IFF_BROADCAST;
 888         else
 889                 card->dev->flags &= ~IFF_BROADCAST;
 890         return rc;
 891 }
 892
 893 static void qeth_l3_start_ipassists(struct qeth_card *card)
 894 {
 895         QETH_CARD_TEXT(card, 3, "strtipas");
 896
 897         qeth_l3_start_ipa_arp_processing(card); /* go on*/
 898         qeth_l3_start_ipa_source_mac(card);     /* go on*/
 899         qeth_l3_start_ipa_vlan(card);           /* go on*/
 900         qeth_l3_start_ipa_multicast(card);              /* go on*/
 901         qeth_l3_start_ipa_ipv6(card);           /* go on*/
 902         qeth_l3_start_ipa_broadcast(card);              /* go on*/
 903 }
 904
 905 static int qeth_l3_iqd_read_initial_mac_cb(struct qeth_card *card,
 906                 struct qeth_reply *reply, unsigned long data)
 907 {
 908         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
 909
 910         if (cmd->hdr.return_code)
 911                 return -EIO;
 912         if (!is_valid_ether_addr(cmd->data.create_destroy_addr.mac_addr))
 913                 return -EADDRNOTAVAIL;
 914
 915         ether_addr_copy(card->dev->dev_addr,
 916                         cmd->data.create_destroy_addr.mac_addr);
 917         return 0;
 918 }
 919
 920 static int qeth_l3_iqd_read_initial_mac(struct qeth_card *card)
 921 {
 922         int rc = 0;
 923         struct qeth_cmd_buffer *iob;
 924
 925         QETH_CARD_TEXT(card, 2, "hsrmac");
 926
 927         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_CREATE_ADDR, QETH_PROT_IPV6,
 928                                  IPA_DATA_SIZEOF(create_destroy_addr));
 929         if (!iob)
 930                 return -ENOMEM;
 931
 932         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_iqd_read_initial_mac_cb,
 933                                 NULL);
 934         return rc;
 935 }
 936
 937 static int qeth_l3_get_unique_id_cb(struct qeth_card *card,
 938                 struct qeth_reply *reply, unsigned long data)
 939 {
 940         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
 941         u16 *uid = reply->param;
 942
 943         if (cmd->hdr.return_code == 0) {
 944                 *uid = cmd->data.create_destroy_addr.uid;
 945                 return 0;
 946         }
 947
 948         dev_warn(&card->gdev->dev, "The network adapter failed to generate a unique ID\n");
 949         return -EIO;
 950 }
 951
 952 static u16 qeth_l3_get_unique_id(struct qeth_card *card, u16 uid)
 953 {
 954         struct qeth_cmd_buffer *iob;
 955
 956         QETH_CARD_TEXT(card, 2, "guniqeid");
 957
 958         if (!qeth_is_supported(card, IPA_IPV6))
 959                 goto out;
 960
 961         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_CREATE_ADDR, QETH_PROT_IPV6,
 962                                  IPA_DATA_SIZEOF(create_destroy_addr));
 963         if (!iob)
 964                 goto out;
 965
 966         __ipa_cmd(iob)->data.create_destroy_addr.uid = uid;
 967         qeth_send_ipa_cmd(card, iob, qeth_l3_get_unique_id_cb, &uid);
 968
 969 out:
 970         return uid;
 971 }
 972
 973 static int
 974 qeth_diags_trace_cb(struct qeth_card *card, struct qeth_reply *reply,
 975                             unsigned long data)
 976 {
 977         struct qeth_ipa_cmd        *cmd;
 978         __u16 rc;
 979
 980         QETH_CARD_TEXT(card, 2, "diastrcb");
 981
 982         cmd = (struct qeth_ipa_cmd *)data;
 983         rc = cmd->hdr.return_code;
 984         if (rc)
 985                 QETH_CARD_TEXT_(card, 2, "dxter%x", rc);
 986         switch (cmd->data.diagass.action) {
 987         case QETH_DIAGS_CMD_TRACE_QUERY:
 988                 break;
 989         case QETH_DIAGS_CMD_TRACE_DISABLE:
 990                 switch (rc) {
 991                 case 0:
 992                 case IPA_RC_INVALID_SUBCMD:
 993                         card->info.promisc_mode = SET_PROMISC_MODE_OFF;
 994                         dev_info(&card->gdev->dev, "The HiperSockets network "
 995                                 "traffic analyzer is deactivated\n");
 996                         break;
 997                 default:
 998                         break;
 999                 }
1000                 break;
1001         case QETH_DIAGS_CMD_TRACE_ENABLE:
1002                 switch (rc) {
1003                 case 0:
1004                         card->info.promisc_mode = SET_PROMISC_MODE_ON;
1005                         dev_info(&card->gdev->dev, "The HiperSockets network "
1006                                 "traffic analyzer is activated\n");
1007                         break;
1008                 case IPA_RC_HARDWARE_AUTH_ERROR:
1009                         dev_warn(&card->gdev->dev, "The device is not "
1010                                 "authorized to run as a HiperSockets network "
1011                                 "traffic analyzer\n");
1012                         break;
1013                 case IPA_RC_TRACE_ALREADY_ACTIVE:
1014                         dev_warn(&card->gdev->dev, "A HiperSockets "
1015                                 "network traffic analyzer is already "
1016                                 "active in the HiperSockets LAN\n");
1017                         break;
1018                 default:
1019                         break;
1020                 }
1021                 break;
1022         default:
1023                 QETH_DBF_MESSAGE(2, "Unknown sniffer action (%#06x) on device %x\n",
1024                                  cmd->data.diagass.action, CARD_DEVID(card));
1025         }
1026
1027         return rc ? -EIO : 0;
1028 }
1029
1030 static int
1031 qeth_diags_trace(struct qeth_card *card, enum qeth_diags_trace_cmds diags_cmd)
1032 {
1033         struct qeth_cmd_buffer *iob;
1034         struct qeth_ipa_cmd    *cmd;
1035
1036         QETH_CARD_TEXT(card, 2, "diagtrac");
1037
1038         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRACE, 0);
1039         if (!iob)
1040                 return -ENOMEM;
1041         cmd = __ipa_cmd(iob);
1042         cmd->data.diagass.type = QETH_DIAGS_TYPE_HIPERSOCKET;
1043         cmd->data.diagass.action = diags_cmd;
1044         return qeth_send_ipa_cmd(card, iob, qeth_diags_trace_cb, NULL);
1045 }
1046
1047 static int qeth_l3_add_mcast_rtnl(struct net_device *dev, int vid, void *arg)
1048 {
1049         struct qeth_card *card = arg;
1050         struct inet6_dev *in6_dev;
1051         struct in_device *in4_dev;
1052         struct qeth_ipaddr *ipm;
1053         struct qeth_ipaddr tmp;
1054         struct ip_mc_list *im4;
1055         struct ifmcaddr6 *im6;
1056
1057         QETH_CARD_TEXT(card, 4, "addmc");
1058
1059         if (!dev || !(dev->flags & IFF_UP))
1060                 goto out;
1061
1062         in4_dev = __in_dev_get_rtnl(dev);
1063         if (!in4_dev)
1064                 goto walk_ipv6;
1065
1066         qeth_l3_init_ipaddr(&tmp, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV4);
1067         tmp.disp_flag = QETH_DISP_ADDR_ADD;
1068         tmp.is_multicast = 1;
1069
1070         for (im4 = rtnl_dereference(in4_dev->mc_list); im4 != NULL;
1071              im4 = rtnl_dereference(im4->next_rcu)) {
1072                 tmp.u.a4.addr = im4->multiaddr;
1073
1074                 ipm = qeth_l3_find_addr_by_ip(card, &tmp);
1075                 if (ipm) {
1076                         /* for mcast, by-IP match means full match */
1077                         ipm->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
1078                         continue;
1079                 }
1080
1081                 ipm = kmemdup(&tmp, sizeof(tmp), GFP_KERNEL);
1082                 if (!ipm)
1083                         continue;
1084
1085                 hash_add(card->rx_mode_addrs, &ipm->hnode,
1086                          qeth_l3_ipaddr_hash(ipm));
1087         }
1088
1089 walk_ipv6:
1090         if (!qeth_is_supported(card, IPA_IPV6))
1091                 goto out;
1092
1093         in6_dev = __in6_dev_get(dev);
1094         if (!in6_dev)
1095                 goto out;
1096
1097         qeth_l3_init_ipaddr(&tmp, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV6);
1098         tmp.disp_flag = QETH_DISP_ADDR_ADD;
1099         tmp.is_multicast = 1;
1100
1101         for (im6 = rtnl_dereference(in6_dev->mc_list);
1102              im6;
1103              im6 = rtnl_dereference(im6->next)) {
1104                 tmp.u.a6.addr = im6->mca_addr;
1105
1106                 ipm = qeth_l3_find_addr_by_ip(card, &tmp);
1107                 if (ipm) {
1108                         /* for mcast, by-IP match means full match */
1109                         ipm->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
1110                         continue;
1111                 }
1112
1113                 ipm = kmemdup(&tmp, sizeof(tmp), GFP_ATOMIC);
1114                 if (!ipm)
1115                         continue;
1116
1117                 hash_add(card->rx_mode_addrs, &ipm->hnode,
1118                          qeth_l3_ipaddr_hash(ipm));
1119
1120         }
1121
1122 out:
1123         return 0;
1124 }
1125
1126 static void qeth_l3_set_promisc_mode(struct qeth_card *card)
1127 {
1128         bool enable = card->dev->flags & IFF_PROMISC;
1129
1130         if (card->info.promisc_mode == enable)
1131                 return;
1132
1133         if (IS_VM_NIC(card)) {          /* Guestlan trace */
1134                 if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
1135                         qeth_setadp_promisc_mode(card, enable);
1136         } else if (card->options.sniffer &&     /* HiperSockets trace */
1137                    qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
1138                 if (enable) {
1139                         QETH_CARD_TEXT(card, 3, "+promisc");
1140                         qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_ENABLE);
1141                 } else {
1142                         QETH_CARD_TEXT(card, 3, "-promisc");
1143                         qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_DISABLE);
1144                 }
1145         }
1146 }
1147
1148 static void qeth_l3_rx_mode_work(struct work_struct *work)
1149 {
1150         struct qeth_card *card = container_of(work, struct qeth_card,
1151                                               rx_mode_work);
1152         struct qeth_ipaddr *addr;
1153         struct hlist_node *tmp;
1154         int i, rc;
1155
1156         QETH_CARD_TEXT(card, 3, "setmulti");
1157
1158         if (!card->options.sniffer) {
1159                 rtnl_lock();
1160                 qeth_l3_add_mcast_rtnl(card->dev, 0, card);
1161                 if (qeth_is_supported(card, IPA_FULL_VLAN))
1162                         vlan_for_each(card->dev, qeth_l3_add_mcast_rtnl, card);
1163                 rtnl_unlock();
1164
1165                 hash_for_each_safe(card->rx_mode_addrs, i, tmp, addr, hnode) {
1166                         switch (addr->disp_flag) {
1167                         case QETH_DISP_ADDR_DELETE:
1168                                 rc = qeth_l3_deregister_addr_entry(card, addr);
1169                                 if (!rc || rc == -ENOENT) {
1170                                         hash_del(&addr->hnode);
1171                                         kfree(addr);
1172                                 }
1173                                 break;
1174                         case QETH_DISP_ADDR_ADD:
1175                                 rc = qeth_l3_register_addr_entry(card, addr);
1176                                 if (rc && rc != -ENETDOWN) {
1177                                         hash_del(&addr->hnode);
1178                                         kfree(addr);
1179                                         break;
1180                                 }
1181                                 fallthrough;
1182                         default:
1183                                 /* for next call to set_rx_mode(): */
1184                                 addr->disp_flag = QETH_DISP_ADDR_DELETE;
1185                         }
1186                 }
1187         }
1188
1189         qeth_l3_set_promisc_mode(card);
1190 }
1191
1192 static int qeth_l3_arp_makerc(u16 rc)
1193 {
1194         switch (rc) {
1195         case IPA_RC_SUCCESS:
1196                 return 0;
1197         case QETH_IPA_ARP_RC_NOTSUPP:
1198         case QETH_IPA_ARP_RC_Q_NOTSUPP:
1199                 return -EOPNOTSUPP;
1200         case QETH_IPA_ARP_RC_OUT_OF_RANGE:
1201                 return -EINVAL;
1202         case QETH_IPA_ARP_RC_Q_NO_DATA:
1203                 return -ENOENT;
1204         default:
1205                 return -EIO;
1206         }
1207 }
1208
1209 static int qeth_l3_arp_cmd_cb(struct qeth_card *card, struct qeth_reply *reply,
1210                               unsigned long data)
1211 {
1212         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1213
1214         qeth_setassparms_cb(card, reply, data);
1215         return qeth_l3_arp_makerc(cmd->hdr.return_code);
1216 }
1217
1218 static int qeth_l3_arp_set_no_entries(struct qeth_card *card, int no_entries)
1219 {
1220         struct qeth_cmd_buffer *iob;
1221         int rc;
1222
1223         QETH_CARD_TEXT(card, 3, "arpstnoe");
1224
1225         /*
1226          * currently GuestLAN only supports the ARP assist function
1227          * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_SET_NO_ENTRIES;
1228          * thus we say EOPNOTSUPP for this ARP function
1229          */
1230         if (IS_VM_NIC(card))
1231                 return -EOPNOTSUPP;
1232         if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1233                 return -EOPNOTSUPP;
1234         }
1235
1236         iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1237                                        IPA_CMD_ASS_ARP_SET_NO_ENTRIES,
1238                                        SETASS_DATA_SIZEOF(flags_32bit),
1239                                        QETH_PROT_IPV4);
1240         if (!iob)
1241                 return -ENOMEM;
1242
1243         __ipa_cmd(iob)->data.setassparms.data.flags_32bit = (u32) no_entries;
1244         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
1245         if (rc)
1246                 QETH_DBF_MESSAGE(2, "Could not set number of ARP entries on device %x: %#x\n",
1247                                  CARD_DEVID(card), rc);
1248         return rc;
1249 }
1250
1251 static __u32 get_arp_entry_size(struct qeth_card *card,
1252                         struct qeth_arp_query_data *qdata,
1253                         struct qeth_arp_entrytype *type, __u8 strip_entries)
1254 {
1255         __u32 rc;
1256         __u8 is_hsi;
1257
1258         is_hsi = qdata->reply_bits == 5;
1259         if (type->ip == QETHARP_IP_ADDR_V4) {
1260                 QETH_CARD_TEXT(card, 4, "arpev4");
1261                 if (strip_entries) {
1262                         rc = is_hsi ? sizeof(struct qeth_arp_qi_entry5_short) :
1263                                 sizeof(struct qeth_arp_qi_entry7_short);
1264                 } else {
1265                         rc = is_hsi ? sizeof(struct qeth_arp_qi_entry5) :
1266                                 sizeof(struct qeth_arp_qi_entry7);
1267                 }
1268         } else if (type->ip == QETHARP_IP_ADDR_V6) {
1269                 QETH_CARD_TEXT(card, 4, "arpev6");
1270                 if (strip_entries) {
1271                         rc = is_hsi ?
1272                                 sizeof(struct qeth_arp_qi_entry5_short_ipv6) :
1273                                 sizeof(struct qeth_arp_qi_entry7_short_ipv6);
1274                 } else {
1275                         rc = is_hsi ?
1276                                 sizeof(struct qeth_arp_qi_entry5_ipv6) :
1277                                 sizeof(struct qeth_arp_qi_entry7_ipv6);
1278                 }
1279         } else {
1280                 QETH_CARD_TEXT(card, 4, "arpinv");
1281                 rc = 0;
1282         }
1283
1284         return rc;
1285 }
1286
1287 static int arpentry_matches_prot(struct qeth_arp_entrytype *type, __u16 prot)
1288 {
1289         return (type->ip == QETHARP_IP_ADDR_V4 && prot == QETH_PROT_IPV4) ||
1290                 (type->ip == QETHARP_IP_ADDR_V6 && prot == QETH_PROT_IPV6);
1291 }
1292
1293 static int qeth_l3_arp_query_cb(struct qeth_card *card,
1294                 struct qeth_reply *reply, unsigned long data)
1295 {
1296         struct qeth_ipa_cmd *cmd;
1297         struct qeth_arp_query_data *qdata;
1298         struct qeth_arp_query_info *qinfo;
1299         int e;
1300         int entrybytes_done;
1301         int stripped_bytes;
1302         __u8 do_strip_entries;
1303
1304         QETH_CARD_TEXT(card, 3, "arpquecb");
1305
1306         qinfo = (struct qeth_arp_query_info *) reply->param;
1307         cmd = (struct qeth_ipa_cmd *) data;
1308         QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.prot_version);
1309         if (cmd->hdr.return_code) {
1310                 QETH_CARD_TEXT(card, 4, "arpcberr");
1311                 QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.return_code);
1312                 return qeth_l3_arp_makerc(cmd->hdr.return_code);
1313         }
1314         if (cmd->data.setassparms.hdr.return_code) {
1315                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
1316                 QETH_CARD_TEXT(card, 4, "setaperr");
1317                 QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.return_code);
1318                 return qeth_l3_arp_makerc(cmd->hdr.return_code);
1319         }
1320         qdata = &cmd->data.setassparms.data.query_arp;
1321         QETH_CARD_TEXT_(card, 4, "anoen%i", qdata->no_entries);
1322
1323         do_strip_entries = (qinfo->mask_bits & QETH_QARP_STRIP_ENTRIES) > 0;
1324         stripped_bytes = do_strip_entries ? QETH_QARP_MEDIASPECIFIC_BYTES : 0;
1325         entrybytes_done = 0;
1326         for (e = 0; e < qdata->no_entries; ++e) {
1327                 char *cur_entry;
1328                 __u32 esize;
1329                 struct qeth_arp_entrytype *etype;
1330
1331                 cur_entry = &qdata->data + entrybytes_done;
1332                 etype = &((struct qeth_arp_qi_entry5 *) cur_entry)->type;
1333                 if (!arpentry_matches_prot(etype, cmd->hdr.prot_version)) {
1334                         QETH_CARD_TEXT(card, 4, "pmis");
1335                         QETH_CARD_TEXT_(card, 4, "%i", etype->ip);
1336                         break;
1337                 }
1338                 esize = get_arp_entry_size(card, qdata, etype,
1339                         do_strip_entries);
1340                 QETH_CARD_TEXT_(card, 5, "esz%i", esize);
1341                 if (!esize)
1342                         break;
1343
1344                 if ((qinfo->udata_len - qinfo->udata_offset) < esize) {
1345                         QETH_CARD_TEXT_(card, 4, "qaer3%i", -ENOSPC);
1346                         memset(qinfo->udata, 0, 4);
1347                         return -ENOSPC;
1348                 }
1349
1350                 memcpy(qinfo->udata + qinfo->udata_offset,
1351                         &qdata->data + entrybytes_done + stripped_bytes,
1352                         esize);
1353                 entrybytes_done += esize + stripped_bytes;
1354                 qinfo->udata_offset += esize;
1355                 ++qinfo->no_entries;
1356         }
1357         /* check if all replies received ... */
1358         if (cmd->data.setassparms.hdr.seq_no <
1359             cmd->data.setassparms.hdr.number_of_replies)
1360                 return 1;
1361         QETH_CARD_TEXT_(card, 4, "nove%i", qinfo->no_entries);
1362         memcpy(qinfo->udata, &qinfo->no_entries, 4);
1363         /* keep STRIP_ENTRIES flag so the user program can distinguish
1364          * stripped entries from normal ones */
1365         if (qinfo->mask_bits & QETH_QARP_STRIP_ENTRIES)
1366                 qdata->reply_bits |= QETH_QARP_STRIP_ENTRIES;
1367         memcpy(qinfo->udata + QETH_QARP_MASK_OFFSET, &qdata->reply_bits, 2);
1368         QETH_CARD_TEXT_(card, 4, "rc%i", 0);
1369         return 0;
1370 }
1371
1372 static int qeth_l3_query_arp_cache_info(struct qeth_card *card,
1373         enum qeth_prot_versions prot,
1374         struct qeth_arp_query_info *qinfo)
1375 {
1376         struct qeth_cmd_buffer *iob;
1377         struct qeth_ipa_cmd *cmd;
1378         int rc;
1379
1380         QETH_CARD_TEXT_(card, 3, "qarpipv%i", prot);
1381
1382         iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1383                                        IPA_CMD_ASS_ARP_QUERY_INFO,
1384                                        SETASS_DATA_SIZEOF(query_arp), prot);
1385         if (!iob)
1386                 return -ENOMEM;
1387         cmd = __ipa_cmd(iob);
1388         cmd->data.setassparms.data.query_arp.request_bits = 0x000F;
1389         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_query_cb, qinfo);
1390         if (rc)
1391                 QETH_DBF_MESSAGE(2, "Error while querying ARP cache on device %x: %#x\n",
1392                                  CARD_DEVID(card), rc);
1393         return rc;
1394 }
1395
1396 static int qeth_l3_arp_query(struct qeth_card *card, char __user *udata)
1397 {
1398         struct qeth_arp_query_info qinfo = {0, };
1399         int rc;
1400
1401         QETH_CARD_TEXT(card, 3, "arpquery");
1402
1403         if (!qeth_is_supported(card,/*IPA_QUERY_ARP_ADDR_INFO*/
1404                                IPA_ARP_PROCESSING)) {
1405                 QETH_CARD_TEXT(card, 3, "arpqnsup");
1406                 rc = -EOPNOTSUPP;
1407                 goto out;
1408         }
1409         /* get size of userspace buffer and mask_bits -> 6 bytes */
1410         if (copy_from_user(&qinfo, udata, 6)) {
1411                 rc = -EFAULT;
1412                 goto out;
1413         }
1414         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
1415         if (!qinfo.udata) {
1416                 rc = -ENOMEM;
1417                 goto out;
1418         }
1419         qinfo.udata_offset = QETH_QARP_ENTRIES_OFFSET;
1420         rc = qeth_l3_query_arp_cache_info(card, QETH_PROT_IPV4, &qinfo);
1421         if (rc) {
1422                 if (copy_to_user(udata, qinfo.udata, 4))
1423                         rc = -EFAULT;
1424                 goto free_and_out;
1425         }
1426         if (qinfo.mask_bits & QETH_QARP_WITH_IPV6) {
1427                 /* fails in case of GuestLAN QDIO mode */
1428                 qeth_l3_query_arp_cache_info(card, QETH_PROT_IPV6, &qinfo);
1429         }
1430         if (copy_to_user(udata, qinfo.udata, qinfo.udata_len)) {
1431                 QETH_CARD_TEXT(card, 4, "qactf");
1432                 rc = -EFAULT;
1433                 goto free_and_out;
1434         }
1435         QETH_CARD_TEXT(card, 4, "qacts");
1436
1437 free_and_out:
1438         kfree(qinfo.udata);
1439 out:
1440         return rc;
1441 }
1442
1443 static int qeth_l3_arp_modify_entry(struct qeth_card *card,
1444                                     struct qeth_arp_cache_entry *entry,
1445                                     enum qeth_arp_process_subcmds arp_cmd)
1446 {
1447         struct qeth_arp_cache_entry *cmd_entry;
1448         struct qeth_cmd_buffer *iob;
1449         int rc;
1450
1451         if (arp_cmd == IPA_CMD_ASS_ARP_ADD_ENTRY)
1452                 QETH_CARD_TEXT(card, 3, "arpadd");
1453         else
1454                 QETH_CARD_TEXT(card, 3, "arpdel");
1455
1456         /*
1457          * currently GuestLAN only supports the ARP assist function
1458          * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_ADD_ENTRY;
1459          * thus we say EOPNOTSUPP for this ARP function
1460          */
1461         if (IS_VM_NIC(card))
1462                 return -EOPNOTSUPP;
1463         if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1464                 return -EOPNOTSUPP;
1465         }
1466
1467         iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING, arp_cmd,
1468                                        SETASS_DATA_SIZEOF(arp_entry),
1469                                        QETH_PROT_IPV4);
1470         if (!iob)
1471                 return -ENOMEM;
1472
1473         cmd_entry = &__ipa_cmd(iob)->data.setassparms.data.arp_entry;
1474         ether_addr_copy(cmd_entry->macaddr, entry->macaddr);
1475         memcpy(cmd_entry->ipaddr, entry->ipaddr, 4);
1476         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
1477         if (rc)
1478                 QETH_DBF_MESSAGE(2, "Could not modify (cmd: %#x) ARP entry on device %x: %#x\n",
1479                                  arp_cmd, CARD_DEVID(card), rc);
1480         return rc;
1481 }
1482
1483 static int qeth_l3_arp_flush_cache(struct qeth_card *card)
1484 {
1485         struct qeth_cmd_buffer *iob;
1486         int rc;
1487
1488         QETH_CARD_TEXT(card, 3, "arpflush");
1489
1490         /*
1491          * currently GuestLAN only supports the ARP assist function
1492          * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_FLUSH_CACHE;
1493          * thus we say EOPNOTSUPP for this ARP function
1494         */
1495         if (IS_VM_NIC(card) || IS_IQD(card))
1496                 return -EOPNOTSUPP;
1497         if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1498                 return -EOPNOTSUPP;
1499         }
1500
1501         iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1502                                        IPA_CMD_ASS_ARP_FLUSH_CACHE, 0,
1503                                        QETH_PROT_IPV4);
1504         if (!iob)
1505                 return -ENOMEM;
1506
1507         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
1508         if (rc)
1509                 QETH_DBF_MESSAGE(2, "Could not flush ARP cache on device %x: %#x\n",
1510                                  CARD_DEVID(card), rc);
1511         return rc;
1512 }
1513
1514 static int qeth_l3_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1515 {
1516         struct qeth_card *card = dev->ml_priv;
1517         struct qeth_arp_cache_entry arp_entry;
1518         enum qeth_arp_process_subcmds arp_cmd;
1519         int rc = 0;
1520
1521         switch (cmd) {
1522         case SIOC_QETH_ARP_SET_NO_ENTRIES:
1523                 if (!capable(CAP_NET_ADMIN)) {
1524                         rc = -EPERM;
1525                         break;
1526                 }
1527                 rc = qeth_l3_arp_set_no_entries(card, rq->ifr_ifru.ifru_ivalue);
1528                 break;
1529         case SIOC_QETH_ARP_QUERY_INFO:
1530                 if (!capable(CAP_NET_ADMIN)) {
1531                         rc = -EPERM;
1532                         break;
1533                 }
1534                 rc = qeth_l3_arp_query(card, rq->ifr_ifru.ifru_data);
1535                 break;
1536         case SIOC_QETH_ARP_ADD_ENTRY:
1537         case SIOC_QETH_ARP_REMOVE_ENTRY:
1538                 if (!capable(CAP_NET_ADMIN))
1539                         return -EPERM;
1540                 if (copy_from_user(&arp_entry, rq->ifr_data, sizeof(arp_entry)))
1541                         return -EFAULT;
1542
1543                 arp_cmd = (cmd == SIOC_QETH_ARP_ADD_ENTRY) ?
1544                                 IPA_CMD_ASS_ARP_ADD_ENTRY :
1545                                 IPA_CMD_ASS_ARP_REMOVE_ENTRY;
1546                 return qeth_l3_arp_modify_entry(card, &arp_entry, arp_cmd);
1547         case SIOC_QETH_ARP_FLUSH_CACHE:
1548                 if (!capable(CAP_NET_ADMIN)) {
1549                         rc = -EPERM;
1550                         break;
1551                 }
1552                 rc = qeth_l3_arp_flush_cache(card);
1553                 break;
1554         default:
1555                 rc = -EOPNOTSUPP;
1556         }
1557         return rc;
1558 }
1559
1560 static int qeth_l3_get_cast_type_rcu(struct sk_buff *skb, struct dst_entry *dst,
1561                                      __be16 proto)
1562 {
1563         struct neighbour *n = NULL;
1564
1565         if (dst)
1566                 n = dst_neigh_lookup_skb(dst, skb);
1567
1568         if (n) {
1569                 int cast_type = n->type;
1570
1571                 neigh_release(n);
1572                 if ((cast_type == RTN_BROADCAST) ||
1573                     (cast_type == RTN_MULTICAST) ||
1574                     (cast_type == RTN_ANYCAST))
1575                         return cast_type;
1576                 return RTN_UNICAST;
1577         }
1578
1579         /* no neighbour (eg AF_PACKET), fall back to target's IP address ... */
1580         switch (proto) {
1581         case htons(ETH_P_IP):
1582                 if (ipv4_is_lbcast(ip_hdr(skb)->daddr))
1583                         return RTN_BROADCAST;
1584                 return ipv4_is_multicast(ip_hdr(skb)->daddr) ?
1585                                 RTN_MULTICAST : RTN_UNICAST;
1586         case htons(ETH_P_IPV6):
1587                 return ipv6_addr_is_multicast(&ipv6_hdr(skb)->daddr) ?
1588                                 RTN_MULTICAST : RTN_UNICAST;
1589         case htons(ETH_P_AF_IUCV):
1590                 return RTN_UNICAST;
1591         default:
1592                 /* OSA only: ... and MAC address */
1593                 return qeth_get_ether_cast_type(skb);
1594         }
1595 }
1596
1597 static int qeth_l3_get_cast_type(struct sk_buff *skb, __be16 proto)
1598 {
1599         struct dst_entry *dst;
1600         int cast_type;
1601
1602         rcu_read_lock();
1603         dst = qeth_dst_check_rcu(skb, proto);
1604         cast_type = qeth_l3_get_cast_type_rcu(skb, dst, proto);
1605         rcu_read_unlock();
1606
1607         return cast_type;
1608 }
1609
1610 static u8 qeth_l3_cast_type_to_flag(int cast_type)
1611 {
1612         if (cast_type == RTN_MULTICAST)
1613                 return QETH_CAST_MULTICAST;
1614         if (cast_type == RTN_ANYCAST)
1615                 return QETH_CAST_ANYCAST;
1616         if (cast_type == RTN_BROADCAST)
1617                 return QETH_CAST_BROADCAST;
1618         return QETH_CAST_UNICAST;
1619 }
1620
1621 static void qeth_l3_fill_header(struct qeth_qdio_out_q *queue,
1622                                 struct qeth_hdr *hdr, struct sk_buff *skb,
1623                                 __be16 proto, unsigned int data_len)
1624 {
1625         struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3;
1626         struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
1627         struct qeth_card *card = queue->card;
1628         struct dst_entry *dst;
1629         int cast_type;
1630
1631         hdr->hdr.l3.length = data_len;
1632
1633         if (skb_is_gso(skb)) {
1634                 hdr->hdr.l3.id = QETH_HEADER_TYPE_L3_TSO;
1635         } else {
1636                 hdr->hdr.l3.id = QETH_HEADER_TYPE_LAYER3;
1637
1638                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1639                         qeth_tx_csum(skb, &hdr->hdr.l3.ext_flags, proto);
1640                         /* some HW requires combined L3+L4 csum offload: */
1641                         if (proto == htons(ETH_P_IP))
1642                                 hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_CSUM_HDR_REQ;
1643                 }
1644         }
1645
1646         if (proto == htons(ETH_P_IP) || IS_IQD(card)) {
1647                 /* NETIF_F_HW_VLAN_CTAG_TX */
1648                 if (skb_vlan_tag_present(skb)) {
1649                         hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_VLAN_FRAME;
1650                         hdr->hdr.l3.vlan_id = skb_vlan_tag_get(skb);
1651                 }
1652         } else if (veth->h_vlan_proto == htons(ETH_P_8021Q)) {
1653                 hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_INCLUDE_VLAN_TAG;
1654                 hdr->hdr.l3.vlan_id = ntohs(veth->h_vlan_TCI);
1655         }
1656
1657         rcu_read_lock();
1658         dst = qeth_dst_check_rcu(skb, proto);
1659
1660         if (IS_IQD(card) && skb_get_queue_mapping(skb) != QETH_IQD_MCAST_TXQ)
1661                 cast_type = RTN_UNICAST;
1662         else
1663                 cast_type = qeth_l3_get_cast_type_rcu(skb, dst, proto);
1664         l3_hdr->flags |= qeth_l3_cast_type_to_flag(cast_type);
1665
1666         switch (proto) {
1667         case htons(ETH_P_IP):
1668                 l3_hdr->next_hop.addr.s6_addr32[3] =
1669                                         qeth_next_hop_v4_rcu(skb, dst);
1670                 break;
1671         case htons(ETH_P_IPV6):
1672                 l3_hdr->next_hop.addr = *qeth_next_hop_v6_rcu(skb, dst);
1673
1674                 hdr->hdr.l3.flags |= QETH_HDR_IPV6;
1675                 if (!IS_IQD(card))
1676                         hdr->hdr.l3.flags |= QETH_HDR_PASSTHRU;
1677                 break;
1678         case htons(ETH_P_AF_IUCV):
1679                 l3_hdr->next_hop.addr.s6_addr16[0] = htons(0xfe80);
1680                 memcpy(&l3_hdr->next_hop.addr.s6_addr32[2],
1681                        iucv_trans_hdr(skb)->destUserID, 8);
1682                 l3_hdr->flags |= QETH_HDR_IPV6;
1683                 break;
1684         default:
1685                 /* OSA only: */
1686                 l3_hdr->flags |= QETH_HDR_PASSTHRU;
1687         }
1688         rcu_read_unlock();
1689 }
1690
1691 static void qeth_l3_fixup_headers(struct sk_buff *skb)
1692 {
1693         struct iphdr *iph = ip_hdr(skb);
1694
1695         /* this is safe, IPv6 traffic takes a different path */
1696         if (skb->ip_summed == CHECKSUM_PARTIAL)
1697                 iph->check = 0;
1698         if (skb_is_gso(skb)) {
1699                 iph->tot_len = 0;
1700                 tcp_hdr(skb)->check = ~tcp_v4_check(0, iph->saddr,
1701                                                     iph->daddr, 0);
1702         }
1703 }
1704
1705 static int qeth_l3_xmit(struct qeth_card *card, struct sk_buff *skb,
1706                         struct qeth_qdio_out_q *queue, __be16 proto)
1707 {
1708         unsigned int hw_hdr_len;
1709         int rc;
1710
1711         /* re-use the L2 header area for the HW header: */
1712         hw_hdr_len = skb_is_gso(skb) ? sizeof(struct qeth_hdr_tso) :
1713                                        sizeof(struct qeth_hdr);
1714         rc = skb_cow_head(skb, hw_hdr_len - ETH_HLEN);
1715         if (rc)
1716                 return rc;
1717         skb_pull(skb, ETH_HLEN);
1718
1719         qeth_l3_fixup_headers(skb);
1720         return qeth_xmit(card, skb, queue, proto, qeth_l3_fill_header);
1721 }
1722
1723 static netdev_tx_t qeth_l3_hard_start_xmit(struct sk_buff *skb,
1724                                            struct net_device *dev)
1725 {
1726         struct qeth_card *card = dev->ml_priv;
1727         __be16 proto = vlan_get_protocol(skb);
1728         u16 txq = skb_get_queue_mapping(skb);
1729         struct qeth_qdio_out_q *queue;
1730         int rc;
1731
1732         if (!skb_is_gso(skb))
1733                 qdisc_skb_cb(skb)->pkt_len = skb->len;
1734         if (IS_IQD(card)) {
1735                 queue = card->qdio.out_qs[qeth_iqd_translate_txq(dev, txq)];
1736
1737                 if (card->options.sniffer)
1738                         goto tx_drop;
1739
1740                 switch (proto) {
1741                 case htons(ETH_P_AF_IUCV):
1742                         if (card->options.cq != QETH_CQ_ENABLED)
1743                                 goto tx_drop;
1744                         break;
1745                 case htons(ETH_P_IP):
1746                 case htons(ETH_P_IPV6):
1747                         if (card->options.cq == QETH_CQ_ENABLED)
1748                                 goto tx_drop;
1749                         break;
1750                 default:
1751                         goto tx_drop;
1752                 }
1753         } else {
1754                 queue = card->qdio.out_qs[txq];
1755         }
1756
1757         if (!(dev->flags & IFF_BROADCAST) &&
1758             qeth_l3_get_cast_type(skb, proto) == RTN_BROADCAST)
1759                 goto tx_drop;
1760
1761         if (proto == htons(ETH_P_IP) || IS_IQD(card))
1762                 rc = qeth_l3_xmit(card, skb, queue, proto);
1763         else
1764                 rc = qeth_xmit(card, skb, queue, proto, qeth_l3_fill_header);
1765
1766         if (!rc)
1767                 return NETDEV_TX_OK;
1768
1769 tx_drop:
1770         QETH_TXQ_STAT_INC(queue, tx_dropped);
1771         kfree_skb(skb);
1772         return NETDEV_TX_OK;
1773 }
1774
1775 static void qeth_l3_set_rx_mode(struct net_device *dev)
1776 {
1777         struct qeth_card *card = dev->ml_priv;
1778
1779         schedule_work(&card->rx_mode_work);
1780 }
1781
1782 /*
1783  * we need NOARP for IPv4 but we want neighbor solicitation for IPv6. Setting
1784  * NOARP on the netdevice is no option because it also turns off neighbor
1785  * solicitation. For IPv4 we install a neighbor_setup function. We don't want
1786  * arp resolution but we want the hard header (packet socket will work
1787  * e.g. tcpdump)
1788  */
1789 static int qeth_l3_neigh_setup_noarp(struct neighbour *n)
1790 {
1791         n->nud_state = NUD_NOARP;
1792         memcpy(n->ha, "FAKELL", 6);
1793         n->output = n->ops->connected_output;
1794         return 0;
1795 }
1796
1797 static int
1798 qeth_l3_neigh_setup(struct net_device *dev, struct neigh_parms *np)
1799 {
1800         if (np->tbl->family == AF_INET)
1801                 np->neigh_setup = qeth_l3_neigh_setup_noarp;
1802
1803         return 0;
1804 }
1805
1806 static netdev_features_t qeth_l3_osa_features_check(struct sk_buff *skb,
1807                                                     struct net_device *dev,
1808                                                     netdev_features_t features)
1809 {
1810         if (vlan_get_protocol(skb) != htons(ETH_P_IP))
1811                 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
1812         return qeth_features_check(skb, dev, features);
1813 }
1814
1815 static u16 qeth_l3_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
1816                                     struct net_device *sb_dev)
1817 {
1818         __be16 proto = vlan_get_protocol(skb);
1819
1820         return qeth_iqd_select_queue(dev, skb,
1821                                      qeth_l3_get_cast_type(skb, proto), sb_dev);
1822 }
1823
1824 static u16 qeth_l3_osa_select_queue(struct net_device *dev, struct sk_buff *skb,
1825                                     struct net_device *sb_dev)
1826 {
1827         struct qeth_card *card = dev->ml_priv;
1828
1829         if (qeth_uses_tx_prio_queueing(card))
1830                 return qeth_get_priority_queue(card, skb);
1831
1832         return netdev_pick_tx(dev, skb, sb_dev);
1833 }
1834
1835 static const struct net_device_ops qeth_l3_netdev_ops = {
1836         .ndo_open               = qeth_open,
1837         .ndo_stop               = qeth_stop,
1838         .ndo_get_stats64        = qeth_get_stats64,
1839         .ndo_start_xmit         = qeth_l3_hard_start_xmit,
1840         .ndo_select_queue       = qeth_l3_iqd_select_queue,
1841         .ndo_validate_addr      = eth_validate_addr,
1842         .ndo_set_rx_mode        = qeth_l3_set_rx_mode,
1843         .ndo_do_ioctl           = qeth_do_ioctl,
1844         .ndo_fix_features       = qeth_fix_features,
1845         .ndo_set_features       = qeth_set_features,
1846         .ndo_tx_timeout         = qeth_tx_timeout,
1847 };
1848
1849 static const struct net_device_ops qeth_l3_osa_netdev_ops = {
1850         .ndo_open               = qeth_open,
1851         .ndo_stop               = qeth_stop,
1852         .ndo_get_stats64        = qeth_get_stats64,
1853         .ndo_start_xmit         = qeth_l3_hard_start_xmit,
1854         .ndo_features_check     = qeth_l3_osa_features_check,
1855         .ndo_select_queue       = qeth_l3_osa_select_queue,
1856         .ndo_validate_addr      = eth_validate_addr,
1857         .ndo_set_rx_mode        = qeth_l3_set_rx_mode,
1858         .ndo_do_ioctl           = qeth_do_ioctl,
1859         .ndo_fix_features       = qeth_fix_features,
1860         .ndo_set_features       = qeth_set_features,
1861         .ndo_tx_timeout         = qeth_tx_timeout,
1862         .ndo_neigh_setup        = qeth_l3_neigh_setup,
1863 };
1864
1865 static int qeth_l3_setup_netdev(struct qeth_card *card)
1866 {
1867         struct net_device *dev = card->dev;
1868         unsigned int headroom;
1869         int rc;
1870
1871         if (IS_OSD(card) || IS_OSX(card)) {
1872                 card->dev->netdev_ops = &qeth_l3_osa_netdev_ops;
1873
1874                 /*IPv6 address autoconfiguration stuff*/
1875                 dev->dev_id = qeth_l3_get_unique_id(card, dev->dev_id);
1876
1877                 if (!IS_VM_NIC(card)) {
1878                         card->dev->features |= NETIF_F_SG;
1879                         card->dev->hw_features |= NETIF_F_TSO |
1880                                 NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
1881                         card->dev->vlan_features |= NETIF_F_TSO |
1882                                 NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
1883                 }
1884
1885                 if (qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) {
1886                         card->dev->hw_features |= NETIF_F_IPV6_CSUM;
1887                         card->dev->vlan_features |= NETIF_F_IPV6_CSUM;
1888                 }
1889                 if (qeth_is_supported6(card, IPA_OUTBOUND_TSO)) {
1890                         card->dev->hw_features |= NETIF_F_TSO6;
1891                         card->dev->vlan_features |= NETIF_F_TSO6;
1892                 }
1893
1894                 /* allow for de-acceleration of NETIF_F_HW_VLAN_CTAG_TX: */
1895                 if (card->dev->hw_features & NETIF_F_TSO6)
1896                         headroom = sizeof(struct qeth_hdr_tso) + VLAN_HLEN;
1897                 else if (card->dev->hw_features & NETIF_F_TSO)
1898                         headroom = sizeof(struct qeth_hdr_tso);
1899                 else
1900                         headroom = sizeof(struct qeth_hdr) + VLAN_HLEN;
1901         } else if (IS_IQD(card)) {
1902                 card->dev->flags |= IFF_NOARP;
1903                 card->dev->netdev_ops = &qeth_l3_netdev_ops;
1904                 headroom = sizeof(struct qeth_hdr) - ETH_HLEN;
1905
1906                 rc = qeth_l3_iqd_read_initial_mac(card);
1907                 if (rc)
1908                         return rc;
1909         } else
1910                 return -ENODEV;
1911
1912         card->dev->needed_headroom = headroom;
1913         card->dev->features |=  NETIF_F_HW_VLAN_CTAG_TX |
1914                                 NETIF_F_HW_VLAN_CTAG_RX;
1915
1916         netif_keep_dst(card->dev);
1917         if (card->dev->hw_features & (NETIF_F_TSO | NETIF_F_TSO6))
1918                 netif_set_gso_max_size(card->dev,
1919                                        PAGE_SIZE * (QETH_MAX_BUFFER_ELEMENTS(card) - 1));
1920
1921         netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT);
1922         return register_netdev(card->dev);
1923 }
1924
1925 static const struct device_type qeth_l3_devtype = {
1926         .name = "qeth_layer3",
1927         .groups = qeth_l3_attr_groups,
1928 };
1929
1930 static int qeth_l3_probe_device(struct ccwgroup_device *gdev)
1931 {
1932         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1933         int rc;
1934
1935         hash_init(card->ip_htable);
1936         mutex_init(&card->ip_lock);
1937         card->cmd_wq = alloc_ordered_workqueue("%s_cmd", 0,
1938                                                dev_name(&gdev->dev));
1939         if (!card->cmd_wq)
1940                 return -ENOMEM;
1941
1942         if (gdev->dev.type == &qeth_generic_devtype) {
1943                 rc = device_add_groups(&gdev->dev, qeth_l3_attr_groups);
1944                 if (rc) {
1945                         destroy_workqueue(card->cmd_wq);
1946                         return rc;
1947                 }
1948         }
1949
1950         INIT_WORK(&card->rx_mode_work, qeth_l3_rx_mode_work);
1951         return 0;
1952 }
1953
1954 static void qeth_l3_remove_device(struct ccwgroup_device *cgdev)
1955 {
1956         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1957
1958         if (cgdev->dev.type == &qeth_generic_devtype)
1959                 device_remove_groups(&cgdev->dev, qeth_l3_attr_groups);
1960
1961         qeth_set_allowed_threads(card, 0, 1);
1962         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1963
1964         if (cgdev->state == CCWGROUP_ONLINE)
1965                 qeth_set_offline(card, card->discipline, false);
1966
1967         cancel_work_sync(&card->close_dev_work);
1968         if (card->dev->reg_state == NETREG_REGISTERED)
1969                 unregister_netdev(card->dev);
1970
1971         flush_workqueue(card->cmd_wq);
1972         destroy_workqueue(card->cmd_wq);
1973         qeth_l3_clear_ip_htable(card, 0);
1974         qeth_l3_clear_ipato_list(card);
1975 }
1976
1977 static int qeth_l3_set_online(struct qeth_card *card, bool carrier_ok)
1978 {
1979         struct net_device *dev = card->dev;
1980         int rc = 0;
1981
1982         /* softsetup */
1983         QETH_CARD_TEXT(card, 2, "softsetp");
1984
1985         rc = qeth_l3_setadapter_parms(card);
1986         if (rc)
1987                 QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
1988         if (!card->options.sniffer) {
1989                 qeth_l3_start_ipassists(card);
1990
1991                 rc = qeth_l3_setrouting_v4(card);
1992                 if (rc)
1993                         QETH_CARD_TEXT_(card, 2, "4err%04x", rc);
1994                 rc = qeth_l3_setrouting_v6(card);
1995                 if (rc)
1996                         QETH_CARD_TEXT_(card, 2, "5err%04x", rc);
1997         }
1998
1999         card->state = CARD_STATE_SOFTSETUP;
2000
2001         qeth_set_allowed_threads(card, 0xffffffff, 0);
2002         qeth_l3_recover_ip(card);
2003
2004         if (dev->reg_state != NETREG_REGISTERED) {
2005                 rc = qeth_l3_setup_netdev(card);
2006                 if (rc)
2007                         goto err_setup;
2008
2009                 if (carrier_ok)
2010                         netif_carrier_on(dev);
2011         } else {
2012                 rtnl_lock();
2013                 rc = qeth_set_real_num_tx_queues(card,
2014                                                  qeth_tx_actual_queues(card));
2015                 if (rc) {
2016                         rtnl_unlock();
2017                         goto err_set_queues;
2018                 }
2019
2020                 if (carrier_ok)
2021                         netif_carrier_on(dev);
2022                 else
2023                         netif_carrier_off(dev);
2024
2025                 netif_device_attach(dev);
2026                 qeth_enable_hw_features(dev);
2027
2028                 if (card->info.open_when_online) {
2029                         card->info.open_when_online = 0;
2030                         dev_open(dev, NULL);
2031                 }
2032                 rtnl_unlock();
2033         }
2034         return 0;
2035
2036 err_set_queues:
2037 err_setup:
2038         qeth_set_allowed_threads(card, 0, 1);
2039         card->state = CARD_STATE_DOWN;
2040         qeth_l3_clear_ip_htable(card, 1);
2041         return rc;
2042 }
2043
2044 static void qeth_l3_set_offline(struct qeth_card *card)
2045 {
2046         qeth_set_allowed_threads(card, 0, 1);
2047         qeth_l3_drain_rx_mode_cache(card);
2048
2049         if (card->options.sniffer &&
2050             (card->info.promisc_mode == SET_PROMISC_MODE_ON))
2051                 qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_DISABLE);
2052
2053         if (card->state == CARD_STATE_SOFTSETUP) {
2054                 card->state = CARD_STATE_DOWN;
2055                 qeth_l3_clear_ip_htable(card, 1);
2056         }
2057 }
2058
2059 /* Returns zero if the command is successfully "consumed" */
2060 static int qeth_l3_control_event(struct qeth_card *card,
2061                                         struct qeth_ipa_cmd *cmd)
2062 {
2063         return 1;
2064 }
2065
2066 const struct qeth_discipline qeth_l3_discipline = {
2067         .devtype = &qeth_l3_devtype,
2068         .setup = qeth_l3_probe_device,
2069         .remove = qeth_l3_remove_device,
2070         .set_online = qeth_l3_set_online,
2071         .set_offline = qeth_l3_set_offline,
2072         .do_ioctl = qeth_l3_do_ioctl,
2073         .control_event_handler = qeth_l3_control_event,
2074 };
2075 EXPORT_SYMBOL_GPL(qeth_l3_discipline);
2076
2077 static int qeth_l3_handle_ip_event(struct qeth_card *card,
2078                                    struct qeth_ipaddr *addr,
2079                                    unsigned long event)
2080 {
2081         switch (event) {
2082         case NETDEV_UP:
2083                 qeth_l3_modify_ip(card, addr, true);
2084                 return NOTIFY_OK;
2085         case NETDEV_DOWN:
2086                 qeth_l3_modify_ip(card, addr, false);
2087                 return NOTIFY_OK;
2088         default:
2089                 return NOTIFY_DONE;
2090         }
2091 }
2092
2093 struct qeth_l3_ip_event_work {
2094         struct work_struct work;
2095         struct qeth_card *card;
2096         struct qeth_ipaddr addr;
2097 };
2098
2099 #define to_ip_work(w) container_of((w), struct qeth_l3_ip_event_work, work)
2100
2101 static void qeth_l3_add_ip_worker(struct work_struct *work)
2102 {
2103         struct qeth_l3_ip_event_work *ip_work = to_ip_work(work);
2104
2105         qeth_l3_modify_ip(ip_work->card, &ip_work->addr, true);
2106         kfree(work);
2107 }
2108
2109 static void qeth_l3_delete_ip_worker(struct work_struct *work)
2110 {
2111         struct qeth_l3_ip_event_work *ip_work = to_ip_work(work);
2112
2113         qeth_l3_modify_ip(ip_work->card, &ip_work->addr, false);
2114         kfree(work);
2115 }
2116
2117 static struct qeth_card *qeth_l3_get_card_from_dev(struct net_device *dev)
2118 {
2119         if (is_vlan_dev(dev))
2120                 dev = vlan_dev_real_dev(dev);
2121         if (dev->netdev_ops == &qeth_l3_osa_netdev_ops ||
2122             dev->netdev_ops == &qeth_l3_netdev_ops)
2123                 return (struct qeth_card *) dev->ml_priv;
2124         return NULL;
2125 }
2126
2127 static int qeth_l3_ip_event(struct notifier_block *this,
2128                             unsigned long event, void *ptr)
2129 {
2130         struct in_ifaddr *ifa = (struct in_ifaddr *)ptr;
2131         struct net_device *dev = ifa->ifa_dev->dev;
2132         struct qeth_ipaddr addr;
2133         struct qeth_card *card;
2134
2135         card = qeth_l3_get_card_from_dev(dev);
2136         if (!card)
2137                 return NOTIFY_DONE;
2138         QETH_CARD_TEXT(card, 3, "ipevent");
2139
2140         qeth_l3_init_ipaddr(&addr, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV4);
2141         addr.u.a4.addr = ifa->ifa_address;
2142         addr.u.a4.mask = ifa->ifa_mask;
2143
2144         return qeth_l3_handle_ip_event(card, &addr, event);
2145 }
2146
2147 static struct notifier_block qeth_l3_ip_notifier = {
2148         qeth_l3_ip_event,
2149         NULL,
2150 };
2151
2152 static int qeth_l3_ip6_event(struct notifier_block *this,
2153                              unsigned long event, void *ptr)
2154 {
2155         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
2156         struct net_device *dev = ifa->idev->dev;
2157         struct qeth_l3_ip_event_work *ip_work;
2158         struct qeth_card *card;
2159
2160         if (event != NETDEV_UP && event != NETDEV_DOWN)
2161                 return NOTIFY_DONE;
2162
2163         card = qeth_l3_get_card_from_dev(dev);
2164         if (!card)
2165                 return NOTIFY_DONE;
2166         QETH_CARD_TEXT(card, 3, "ip6event");
2167         if (!qeth_is_supported(card, IPA_IPV6))
2168                 return NOTIFY_DONE;
2169
2170         ip_work = kmalloc(sizeof(*ip_work), GFP_ATOMIC);
2171         if (!ip_work)
2172                 return NOTIFY_DONE;
2173
2174         if (event == NETDEV_UP)
2175                 INIT_WORK(&ip_work->work, qeth_l3_add_ip_worker);
2176         else
2177                 INIT_WORK(&ip_work->work, qeth_l3_delete_ip_worker);
2178
2179         ip_work->card = card;
2180         qeth_l3_init_ipaddr(&ip_work->addr, QETH_IP_TYPE_NORMAL,
2181                             QETH_PROT_IPV6);
2182         ip_work->addr.u.a6.addr = ifa->addr;
2183         ip_work->addr.u.a6.pfxlen = ifa->prefix_len;
2184
2185         queue_work(card->cmd_wq, &ip_work->work);
2186         return NOTIFY_OK;
2187 }
2188
2189 static struct notifier_block qeth_l3_ip6_notifier = {
2190         qeth_l3_ip6_event,
2191         NULL,
2192 };
2193
2194 static int qeth_l3_register_notifiers(void)
2195 {
2196         int rc;
2197
2198         QETH_DBF_TEXT(SETUP, 5, "regnotif");
2199         rc = register_inetaddr_notifier(&qeth_l3_ip_notifier);
2200         if (rc)
2201                 return rc;
2202         rc = register_inet6addr_notifier(&qeth_l3_ip6_notifier);
2203         if (rc) {
2204                 unregister_inetaddr_notifier(&qeth_l3_ip_notifier);
2205                 return rc;
2206         }
2207         return 0;
2208 }
2209
2210 static void qeth_l3_unregister_notifiers(void)
2211 {
2212         QETH_DBF_TEXT(SETUP, 5, "unregnot");
2213         WARN_ON(unregister_inetaddr_notifier(&qeth_l3_ip_notifier));
2214         WARN_ON(unregister_inet6addr_notifier(&qeth_l3_ip6_notifier));
2215 }
2216
2217 static int __init qeth_l3_init(void)
2218 {
2219         pr_info("register layer 3 discipline\n");
2220         return qeth_l3_register_notifiers();
2221 }
2222
2223 static void __exit qeth_l3_exit(void)
2224 {
2225         qeth_l3_unregister_notifiers();
2226         pr_info("unregister layer 3 discipline\n");
2227 }
2228
2229 module_init(qeth_l3_init);
2230 module_exit(qeth_l3_exit);
2231 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
2232 MODULE_DESCRIPTION("qeth layer 3 discipline");
2233 MODULE_LICENSE("GPL");