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                         goto out_inval;
 438                 default:
 439                         goto out_inval;
 440                 }
 441         }
 442 out_inval:
 443         *type = NO_ROUTER;
 444         return -EINVAL;
 445 }
 446
 447 int qeth_l3_setrouting_v4(struct qeth_card *card)
 448 {
 449         int rc;
 450
 451         QETH_CARD_TEXT(card, 3, "setrtg4");
 452
 453         rc = qeth_l3_correct_routing_type(card, &card->options.route4.type,
 454                                   QETH_PROT_IPV4);
 455         if (rc)
 456                 return rc;
 457
 458         rc = qeth_l3_send_setrouting(card, card->options.route4.type,
 459                                   QETH_PROT_IPV4);
 460         if (rc) {
 461                 card->options.route4.type = NO_ROUTER;
 462                 QETH_DBF_MESSAGE(2, "Error (%#06x) while setting routing type on device %x. Type set to 'no router'.\n",
 463                                  rc, CARD_DEVID(card));
 464         }
 465         return rc;
 466 }
 467
 468 int qeth_l3_setrouting_v6(struct qeth_card *card)
 469 {
 470         int rc = 0;
 471
 472         QETH_CARD_TEXT(card, 3, "setrtg6");
 473
 474         if (!qeth_is_supported(card, IPA_IPV6))
 475                 return 0;
 476         rc = qeth_l3_correct_routing_type(card, &card->options.route6.type,
 477                                   QETH_PROT_IPV6);
 478         if (rc)
 479                 return rc;
 480
 481         rc = qeth_l3_send_setrouting(card, card->options.route6.type,
 482                                   QETH_PROT_IPV6);
 483         if (rc) {
 484                 card->options.route6.type = NO_ROUTER;
 485                 QETH_DBF_MESSAGE(2, "Error (%#06x) while setting routing type on device %x. Type set to 'no router'.\n",
 486                                  rc, CARD_DEVID(card));
 487         }
 488         return rc;
 489 }
 490
 491 /*
 492  * IP address takeover related functions
 493  */
 494
 495 /**
 496  * qeth_l3_update_ipato() - Update 'takeover' property, for all NORMAL IPs.
 497  *
 498  * Caller must hold ip_lock.
 499  */
 500 void qeth_l3_update_ipato(struct qeth_card *card)
 501 {
 502         struct qeth_ipaddr *addr;
 503         unsigned int i;
 504
 505         hash_for_each(card->ip_htable, i, addr, hnode) {
 506                 if (addr->type != QETH_IP_TYPE_NORMAL)
 507                         continue;
 508                 addr->ipato = qeth_l3_is_addr_covered_by_ipato(card, addr);
 509         }
 510 }
 511
 512 static void qeth_l3_clear_ipato_list(struct qeth_card *card)
 513 {
 514         struct qeth_ipato_entry *ipatoe, *tmp;
 515
 516         mutex_lock(&card->ip_lock);
 517
 518         list_for_each_entry_safe(ipatoe, tmp, &card->ipato.entries, entry) {
 519                 list_del(&ipatoe->entry);
 520                 kfree(ipatoe);
 521         }
 522
 523         qeth_l3_update_ipato(card);
 524         mutex_unlock(&card->ip_lock);
 525 }
 526
 527 int qeth_l3_add_ipato_entry(struct qeth_card *card,
 528                                 struct qeth_ipato_entry *new)
 529 {
 530         struct qeth_ipato_entry *ipatoe;
 531         int rc = 0;
 532
 533         QETH_CARD_TEXT(card, 2, "addipato");
 534
 535         mutex_lock(&card->ip_lock);
 536
 537         list_for_each_entry(ipatoe, &card->ipato.entries, entry) {
 538                 if (ipatoe->proto != new->proto)
 539                         continue;
 540                 if (!memcmp(ipatoe->addr, new->addr,
 541                             (ipatoe->proto == QETH_PROT_IPV4) ? 4 : 16) &&
 542                     (ipatoe->mask_bits == new->mask_bits)) {
 543                         rc = -EEXIST;
 544                         break;
 545                 }
 546         }
 547
 548         if (!rc) {
 549                 list_add_tail(&new->entry, &card->ipato.entries);
 550                 qeth_l3_update_ipato(card);
 551         }
 552
 553         mutex_unlock(&card->ip_lock);
 554
 555         return rc;
 556 }
 557
 558 int qeth_l3_del_ipato_entry(struct qeth_card *card,
 559                             enum qeth_prot_versions proto, u8 *addr,
 560                             unsigned int mask_bits)
 561 {
 562         struct qeth_ipato_entry *ipatoe, *tmp;
 563         int rc = -ENOENT;
 564
 565         QETH_CARD_TEXT(card, 2, "delipato");
 566
 567         mutex_lock(&card->ip_lock);
 568
 569         list_for_each_entry_safe(ipatoe, tmp, &card->ipato.entries, entry) {
 570                 if (ipatoe->proto != proto)
 571                         continue;
 572                 if (!memcmp(ipatoe->addr, addr,
 573                             (proto == QETH_PROT_IPV4) ? 4 : 16) &&
 574                     (ipatoe->mask_bits == mask_bits)) {
 575                         list_del(&ipatoe->entry);
 576                         qeth_l3_update_ipato(card);
 577                         kfree(ipatoe);
 578                         rc = 0;
 579                 }
 580         }
 581
 582         mutex_unlock(&card->ip_lock);
 583
 584         return rc;
 585 }
 586
 587 int qeth_l3_modify_rxip_vipa(struct qeth_card *card, bool add, const u8 *ip,
 588                              enum qeth_ip_types type,
 589                              enum qeth_prot_versions proto)
 590 {
 591         struct qeth_ipaddr addr;
 592
 593         qeth_l3_init_ipaddr(&addr, type, proto);
 594         if (proto == QETH_PROT_IPV4)
 595                 memcpy(&addr.u.a4.addr, ip, 4);
 596         else
 597                 memcpy(&addr.u.a6.addr, ip, 16);
 598
 599         return qeth_l3_modify_ip(card, &addr, add);
 600 }
 601
 602 int qeth_l3_modify_hsuid(struct qeth_card *card, bool add)
 603 {
 604         struct qeth_ipaddr addr;
 605         unsigned int i;
 606
 607         qeth_l3_init_ipaddr(&addr, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV6);
 608         addr.u.a6.addr.s6_addr[0] = 0xfe;
 609         addr.u.a6.addr.s6_addr[1] = 0x80;
 610         for (i = 0; i < 8; i++)
 611                 addr.u.a6.addr.s6_addr[8+i] = card->options.hsuid[i];
 612
 613         return qeth_l3_modify_ip(card, &addr, add);
 614 }
 615
 616 static int qeth_l3_register_addr_entry(struct qeth_card *card,
 617                                 struct qeth_ipaddr *addr)
 618 {
 619         char buf[50];
 620         int rc = 0;
 621         int cnt = 3;
 622
 623         if (card->options.sniffer)
 624                 return 0;
 625
 626         if (addr->proto == QETH_PROT_IPV4) {
 627                 QETH_CARD_TEXT(card, 2, "setaddr4");
 628                 QETH_CARD_HEX(card, 3, &addr->u.a4.addr, sizeof(int));
 629         } else if (addr->proto == QETH_PROT_IPV6) {
 630                 QETH_CARD_TEXT(card, 2, "setaddr6");
 631                 QETH_CARD_HEX(card, 3, &addr->u.a6.addr, 8);
 632                 QETH_CARD_HEX(card, 3, ((char *)&addr->u.a6.addr) + 8, 8);
 633         } else {
 634                 QETH_CARD_TEXT(card, 2, "setaddr?");
 635                 QETH_CARD_HEX(card, 3, addr, sizeof(struct qeth_ipaddr));
 636         }
 637         do {
 638                 if (addr->is_multicast)
 639                         rc =  qeth_l3_send_setdelmc(card, addr, IPA_CMD_SETIPM);
 640                 else
 641                         rc = qeth_l3_send_setdelip(card, addr, IPA_CMD_SETIP);
 642                 if (rc)
 643                         QETH_CARD_TEXT(card, 2, "failed");
 644         } while ((--cnt > 0) && rc);
 645         if (rc) {
 646                 QETH_CARD_TEXT(card, 2, "FAILED");
 647                 qeth_l3_ipaddr_to_string(addr->proto, (u8 *)&addr->u, buf);
 648                 dev_warn(&card->gdev->dev,
 649                         "Registering IP address %s failed\n", buf);
 650         }
 651         return rc;
 652 }
 653
 654 static int qeth_l3_deregister_addr_entry(struct qeth_card *card,
 655                                                 struct qeth_ipaddr *addr)
 656 {
 657         int rc = 0;
 658
 659         if (card->options.sniffer)
 660                 return 0;
 661
 662         if (addr->proto == QETH_PROT_IPV4) {
 663                 QETH_CARD_TEXT(card, 2, "deladdr4");
 664                 QETH_CARD_HEX(card, 3, &addr->u.a4.addr, sizeof(int));
 665         } else if (addr->proto == QETH_PROT_IPV6) {
 666                 QETH_CARD_TEXT(card, 2, "deladdr6");
 667                 QETH_CARD_HEX(card, 3, &addr->u.a6.addr, 8);
 668                 QETH_CARD_HEX(card, 3, ((char *)&addr->u.a6.addr) + 8, 8);
 669         } else {
 670                 QETH_CARD_TEXT(card, 2, "deladdr?");
 671                 QETH_CARD_HEX(card, 3, addr, sizeof(struct qeth_ipaddr));
 672         }
 673         if (addr->is_multicast)
 674                 rc = qeth_l3_send_setdelmc(card, addr, IPA_CMD_DELIPM);
 675         else
 676                 rc = qeth_l3_send_setdelip(card, addr, IPA_CMD_DELIP);
 677         if (rc)
 678                 QETH_CARD_TEXT(card, 2, "failed");
 679
 680         return rc;
 681 }
 682
 683 static int qeth_l3_setadapter_parms(struct qeth_card *card)
 684 {
 685         int rc = 0;
 686
 687         QETH_CARD_TEXT(card, 2, "setadprm");
 688
 689         if (qeth_adp_supported(card, IPA_SETADP_ALTER_MAC_ADDRESS)) {
 690                 rc = qeth_setadpparms_change_macaddr(card);
 691                 if (rc)
 692                         dev_warn(&card->gdev->dev, "Reading the adapter MAC"
 693                                 " address failed\n");
 694         }
 695
 696         return rc;
 697 }
 698
 699 static int qeth_l3_start_ipa_arp_processing(struct qeth_card *card)
 700 {
 701         int rc;
 702
 703         QETH_CARD_TEXT(card, 3, "ipaarp");
 704
 705         if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
 706                 dev_info(&card->gdev->dev,
 707                          "ARP processing not supported on %s!\n",
 708                          netdev_name(card->dev));
 709                 return 0;
 710         }
 711         rc = qeth_send_simple_setassparms(card, IPA_ARP_PROCESSING,
 712                                           IPA_CMD_ASS_START, NULL);
 713         if (rc) {
 714                 dev_warn(&card->gdev->dev,
 715                          "Starting ARP processing support for %s failed\n",
 716                          netdev_name(card->dev));
 717         }
 718         return rc;
 719 }
 720
 721 static int qeth_l3_start_ipa_source_mac(struct qeth_card *card)
 722 {
 723         int rc;
 724
 725         QETH_CARD_TEXT(card, 3, "stsrcmac");
 726
 727         if (!qeth_is_supported(card, IPA_SOURCE_MAC)) {
 728                 dev_info(&card->gdev->dev,
 729                          "Inbound source MAC-address not supported on %s\n",
 730                          netdev_name(card->dev));
 731                 return -EOPNOTSUPP;
 732         }
 733
 734         rc = qeth_send_simple_setassparms(card, IPA_SOURCE_MAC,
 735                                           IPA_CMD_ASS_START, NULL);
 736         if (rc)
 737                 dev_warn(&card->gdev->dev,
 738                          "Starting source MAC-address support for %s failed\n",
 739                          netdev_name(card->dev));
 740         return rc;
 741 }
 742
 743 static int qeth_l3_start_ipa_vlan(struct qeth_card *card)
 744 {
 745         int rc = 0;
 746
 747         QETH_CARD_TEXT(card, 3, "strtvlan");
 748
 749         if (!qeth_is_supported(card, IPA_FULL_VLAN)) {
 750                 dev_info(&card->gdev->dev,
 751                          "VLAN not supported on %s\n", netdev_name(card->dev));
 752                 return -EOPNOTSUPP;
 753         }
 754
 755         rc = qeth_send_simple_setassparms(card, IPA_VLAN_PRIO,
 756                                           IPA_CMD_ASS_START, NULL);
 757         if (rc) {
 758                 dev_warn(&card->gdev->dev,
 759                          "Starting VLAN support for %s failed\n",
 760                          netdev_name(card->dev));
 761         } else {
 762                 dev_info(&card->gdev->dev, "VLAN enabled\n");
 763         }
 764         return rc;
 765 }
 766
 767 static int qeth_l3_start_ipa_multicast(struct qeth_card *card)
 768 {
 769         int rc;
 770
 771         QETH_CARD_TEXT(card, 3, "stmcast");
 772
 773         if (!qeth_is_supported(card, IPA_MULTICASTING)) {
 774                 dev_info(&card->gdev->dev,
 775                          "Multicast not supported on %s\n",
 776                          netdev_name(card->dev));
 777                 return -EOPNOTSUPP;
 778         }
 779
 780         rc = qeth_send_simple_setassparms(card, IPA_MULTICASTING,
 781                                           IPA_CMD_ASS_START, NULL);
 782         if (rc) {
 783                 dev_warn(&card->gdev->dev,
 784                          "Starting multicast support for %s failed\n",
 785                          netdev_name(card->dev));
 786         } else {
 787                 dev_info(&card->gdev->dev, "Multicast enabled\n");
 788                 card->dev->flags |= IFF_MULTICAST;
 789         }
 790         return rc;
 791 }
 792
 793 static int qeth_l3_softsetup_ipv6(struct qeth_card *card)
 794 {
 795         u32 ipv6_data = 3;
 796         int rc;
 797
 798         QETH_CARD_TEXT(card, 3, "softipv6");
 799
 800         if (IS_IQD(card))
 801                 goto out;
 802
 803         rc = qeth_send_simple_setassparms(card, IPA_IPV6, IPA_CMD_ASS_START,
 804                                           &ipv6_data);
 805         if (rc) {
 806                 dev_err(&card->gdev->dev,
 807                         "Activating IPv6 support for %s failed\n",
 808                         netdev_name(card->dev));
 809                 return rc;
 810         }
 811         rc = qeth_send_simple_setassparms_v6(card, IPA_IPV6, IPA_CMD_ASS_START,
 812                                              NULL);
 813         if (rc) {
 814                 dev_err(&card->gdev->dev,
 815                         "Activating IPv6 support for %s failed\n",
 816                          netdev_name(card->dev));
 817                 return rc;
 818         }
 819         rc = qeth_send_simple_setassparms_v6(card, IPA_PASSTHRU,
 820                                              IPA_CMD_ASS_START, NULL);
 821         if (rc) {
 822                 dev_warn(&card->gdev->dev,
 823                          "Enabling the passthrough mode for %s failed\n",
 824                          netdev_name(card->dev));
 825                 return rc;
 826         }
 827 out:
 828         dev_info(&card->gdev->dev, "IPV6 enabled\n");
 829         return 0;
 830 }
 831
 832 static int qeth_l3_start_ipa_ipv6(struct qeth_card *card)
 833 {
 834         QETH_CARD_TEXT(card, 3, "strtipv6");
 835
 836         if (!qeth_is_supported(card, IPA_IPV6)) {
 837                 dev_info(&card->gdev->dev,
 838                          "IPv6 not supported on %s\n", netdev_name(card->dev));
 839                 return 0;
 840         }
 841         return qeth_l3_softsetup_ipv6(card);
 842 }
 843
 844 static int qeth_l3_start_ipa_broadcast(struct qeth_card *card)
 845 {
 846         u32 filter_data = 1;
 847         int rc;
 848
 849         QETH_CARD_TEXT(card, 3, "stbrdcst");
 850         card->info.broadcast_capable = 0;
 851         if (!qeth_is_supported(card, IPA_FILTERING)) {
 852                 dev_info(&card->gdev->dev,
 853                          "Broadcast not supported on %s\n",
 854                          netdev_name(card->dev));
 855                 rc = -EOPNOTSUPP;
 856                 goto out;
 857         }
 858         rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
 859                                           IPA_CMD_ASS_START, NULL);
 860         if (rc) {
 861                 dev_warn(&card->gdev->dev,
 862                          "Enabling broadcast filtering for %s failed\n",
 863                          netdev_name(card->dev));
 864                 goto out;
 865         }
 866
 867         rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
 868                                           IPA_CMD_ASS_CONFIGURE, &filter_data);
 869         if (rc) {
 870                 dev_warn(&card->gdev->dev,
 871                          "Setting up broadcast filtering for %s failed\n",
 872                          netdev_name(card->dev));
 873                 goto out;
 874         }
 875         card->info.broadcast_capable = QETH_BROADCAST_WITH_ECHO;
 876         dev_info(&card->gdev->dev, "Broadcast enabled\n");
 877         rc = qeth_send_simple_setassparms(card, IPA_FILTERING,
 878                                           IPA_CMD_ASS_ENABLE, &filter_data);
 879         if (rc) {
 880                 dev_warn(&card->gdev->dev,
 881                          "Setting up broadcast echo filtering for %s failed\n",
 882                          netdev_name(card->dev));
 883                 goto out;
 884         }
 885         card->info.broadcast_capable = QETH_BROADCAST_WITHOUT_ECHO;
 886 out:
 887         if (card->info.broadcast_capable)
 888                 card->dev->flags |= IFF_BROADCAST;
 889         else
 890                 card->dev->flags &= ~IFF_BROADCAST;
 891         return rc;
 892 }
 893
 894 static void qeth_l3_start_ipassists(struct qeth_card *card)
 895 {
 896         QETH_CARD_TEXT(card, 3, "strtipas");
 897
 898         qeth_l3_start_ipa_arp_processing(card); /* go on*/
 899         qeth_l3_start_ipa_source_mac(card);     /* go on*/
 900         qeth_l3_start_ipa_vlan(card);           /* go on*/
 901         qeth_l3_start_ipa_multicast(card);              /* go on*/
 902         qeth_l3_start_ipa_ipv6(card);           /* go on*/
 903         qeth_l3_start_ipa_broadcast(card);              /* go on*/
 904 }
 905
 906 static int qeth_l3_iqd_read_initial_mac_cb(struct qeth_card *card,
 907                 struct qeth_reply *reply, unsigned long data)
 908 {
 909         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
 910
 911         if (cmd->hdr.return_code)
 912                 return -EIO;
 913         if (!is_valid_ether_addr(cmd->data.create_destroy_addr.mac_addr))
 914                 return -EADDRNOTAVAIL;
 915
 916         ether_addr_copy(card->dev->dev_addr,
 917                         cmd->data.create_destroy_addr.mac_addr);
 918         return 0;
 919 }
 920
 921 static int qeth_l3_iqd_read_initial_mac(struct qeth_card *card)
 922 {
 923         int rc = 0;
 924         struct qeth_cmd_buffer *iob;
 925
 926         QETH_CARD_TEXT(card, 2, "hsrmac");
 927
 928         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_CREATE_ADDR, QETH_PROT_IPV6,
 929                                  IPA_DATA_SIZEOF(create_destroy_addr));
 930         if (!iob)
 931                 return -ENOMEM;
 932
 933         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_iqd_read_initial_mac_cb,
 934                                 NULL);
 935         return rc;
 936 }
 937
 938 static int qeth_l3_get_unique_id_cb(struct qeth_card *card,
 939                 struct qeth_reply *reply, unsigned long data)
 940 {
 941         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
 942         u16 *uid = reply->param;
 943
 944         if (cmd->hdr.return_code == 0) {
 945                 *uid = cmd->data.create_destroy_addr.uid;
 946                 return 0;
 947         }
 948
 949         dev_warn(&card->gdev->dev, "The network adapter failed to generate a unique ID\n");
 950         return -EIO;
 951 }
 952
 953 static u16 qeth_l3_get_unique_id(struct qeth_card *card, u16 uid)
 954 {
 955         struct qeth_cmd_buffer *iob;
 956
 957         QETH_CARD_TEXT(card, 2, "guniqeid");
 958
 959         if (!qeth_is_supported(card, IPA_IPV6))
 960                 goto out;
 961
 962         iob = qeth_ipa_alloc_cmd(card, IPA_CMD_CREATE_ADDR, QETH_PROT_IPV6,
 963                                  IPA_DATA_SIZEOF(create_destroy_addr));
 964         if (!iob)
 965                 goto out;
 966
 967         __ipa_cmd(iob)->data.create_destroy_addr.uid = uid;
 968         qeth_send_ipa_cmd(card, iob, qeth_l3_get_unique_id_cb, &uid);
 969
 970 out:
 971         return uid;
 972 }
 973
 974 static int
 975 qeth_diags_trace_cb(struct qeth_card *card, struct qeth_reply *reply,
 976                             unsigned long data)
 977 {
 978         struct qeth_ipa_cmd        *cmd;
 979         __u16 rc;
 980
 981         QETH_CARD_TEXT(card, 2, "diastrcb");
 982
 983         cmd = (struct qeth_ipa_cmd *)data;
 984         rc = cmd->hdr.return_code;
 985         if (rc)
 986                 QETH_CARD_TEXT_(card, 2, "dxter%x", rc);
 987         switch (cmd->data.diagass.action) {
 988         case QETH_DIAGS_CMD_TRACE_QUERY:
 989                 break;
 990         case QETH_DIAGS_CMD_TRACE_DISABLE:
 991                 switch (rc) {
 992                 case 0:
 993                 case IPA_RC_INVALID_SUBCMD:
 994                         card->info.promisc_mode = SET_PROMISC_MODE_OFF;
 995                         dev_info(&card->gdev->dev, "The HiperSockets network "
 996                                 "traffic analyzer is deactivated\n");
 997                         break;
 998                 default:
 999                         break;
1000                 }
1001                 break;
1002         case QETH_DIAGS_CMD_TRACE_ENABLE:
1003                 switch (rc) {
1004                 case 0:
1005                         card->info.promisc_mode = SET_PROMISC_MODE_ON;
1006                         dev_info(&card->gdev->dev, "The HiperSockets network "
1007                                 "traffic analyzer is activated\n");
1008                         break;
1009                 case IPA_RC_HARDWARE_AUTH_ERROR:
1010                         dev_warn(&card->gdev->dev, "The device is not "
1011                                 "authorized to run as a HiperSockets network "
1012                                 "traffic analyzer\n");
1013                         break;
1014                 case IPA_RC_TRACE_ALREADY_ACTIVE:
1015                         dev_warn(&card->gdev->dev, "A HiperSockets "
1016                                 "network traffic analyzer is already "
1017                                 "active in the HiperSockets LAN\n");
1018                         break;
1019                 default:
1020                         break;
1021                 }
1022                 break;
1023         default:
1024                 QETH_DBF_MESSAGE(2, "Unknown sniffer action (%#06x) on device %x\n",
1025                                  cmd->data.diagass.action, CARD_DEVID(card));
1026         }
1027
1028         return rc ? -EIO : 0;
1029 }
1030
1031 static int
1032 qeth_diags_trace(struct qeth_card *card, enum qeth_diags_trace_cmds diags_cmd)
1033 {
1034         struct qeth_cmd_buffer *iob;
1035         struct qeth_ipa_cmd    *cmd;
1036
1037         QETH_CARD_TEXT(card, 2, "diagtrac");
1038
1039         iob = qeth_get_diag_cmd(card, QETH_DIAGS_CMD_TRACE, 0);
1040         if (!iob)
1041                 return -ENOMEM;
1042         cmd = __ipa_cmd(iob);
1043         cmd->data.diagass.type = QETH_DIAGS_TYPE_HIPERSOCKET;
1044         cmd->data.diagass.action = diags_cmd;
1045         return qeth_send_ipa_cmd(card, iob, qeth_diags_trace_cb, NULL);
1046 }
1047
1048 static int qeth_l3_add_mcast_rtnl(struct net_device *dev, int vid, void *arg)
1049 {
1050         struct qeth_card *card = arg;
1051         struct inet6_dev *in6_dev;
1052         struct in_device *in4_dev;
1053         struct qeth_ipaddr *ipm;
1054         struct qeth_ipaddr tmp;
1055         struct ip_mc_list *im4;
1056         struct ifmcaddr6 *im6;
1057
1058         QETH_CARD_TEXT(card, 4, "addmc");
1059
1060         if (!dev || !(dev->flags & IFF_UP))
1061                 goto out;
1062
1063         in4_dev = __in_dev_get_rtnl(dev);
1064         if (!in4_dev)
1065                 goto walk_ipv6;
1066
1067         qeth_l3_init_ipaddr(&tmp, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV4);
1068         tmp.disp_flag = QETH_DISP_ADDR_ADD;
1069         tmp.is_multicast = 1;
1070
1071         for (im4 = rtnl_dereference(in4_dev->mc_list); im4 != NULL;
1072              im4 = rtnl_dereference(im4->next_rcu)) {
1073                 tmp.u.a4.addr = im4->multiaddr;
1074
1075                 ipm = qeth_l3_find_addr_by_ip(card, &tmp);
1076                 if (ipm) {
1077                         /* for mcast, by-IP match means full match */
1078                         ipm->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
1079                         continue;
1080                 }
1081
1082                 ipm = kmemdup(&tmp, sizeof(tmp), GFP_KERNEL);
1083                 if (!ipm)
1084                         continue;
1085
1086                 hash_add(card->rx_mode_addrs, &ipm->hnode,
1087                          qeth_l3_ipaddr_hash(ipm));
1088         }
1089
1090 walk_ipv6:
1091         if (!qeth_is_supported(card, IPA_IPV6))
1092                 goto out;
1093
1094         in6_dev = __in6_dev_get(dev);
1095         if (!in6_dev)
1096                 goto out;
1097
1098         qeth_l3_init_ipaddr(&tmp, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV6);
1099         tmp.disp_flag = QETH_DISP_ADDR_ADD;
1100         tmp.is_multicast = 1;
1101
1102         for (im6 = rtnl_dereference(in6_dev->mc_list);
1103              im6;
1104              im6 = rtnl_dereference(im6->next)) {
1105                 tmp.u.a6.addr = im6->mca_addr;
1106
1107                 ipm = qeth_l3_find_addr_by_ip(card, &tmp);
1108                 if (ipm) {
1109                         /* for mcast, by-IP match means full match */
1110                         ipm->disp_flag = QETH_DISP_ADDR_DO_NOTHING;
1111                         continue;
1112                 }
1113
1114                 ipm = kmemdup(&tmp, sizeof(tmp), GFP_ATOMIC);
1115                 if (!ipm)
1116                         continue;
1117
1118                 hash_add(card->rx_mode_addrs, &ipm->hnode,
1119                          qeth_l3_ipaddr_hash(ipm));
1120
1121         }
1122
1123 out:
1124         return 0;
1125 }
1126
1127 static void qeth_l3_set_promisc_mode(struct qeth_card *card)
1128 {
1129         bool enable = card->dev->flags & IFF_PROMISC;
1130
1131         if (card->info.promisc_mode == enable)
1132                 return;
1133
1134         if (IS_VM_NIC(card)) {          /* Guestlan trace */
1135                 if (qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
1136                         qeth_setadp_promisc_mode(card, enable);
1137         } else if (card->options.sniffer &&     /* HiperSockets trace */
1138                    qeth_adp_supported(card, IPA_SETADP_SET_DIAG_ASSIST)) {
1139                 if (enable) {
1140                         QETH_CARD_TEXT(card, 3, "+promisc");
1141                         qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_ENABLE);
1142                 } else {
1143                         QETH_CARD_TEXT(card, 3, "-promisc");
1144                         qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_DISABLE);
1145                 }
1146         }
1147 }
1148
1149 static void qeth_l3_rx_mode_work(struct work_struct *work)
1150 {
1151         struct qeth_card *card = container_of(work, struct qeth_card,
1152                                               rx_mode_work);
1153         struct qeth_ipaddr *addr;
1154         struct hlist_node *tmp;
1155         int i, rc;
1156
1157         QETH_CARD_TEXT(card, 3, "setmulti");
1158
1159         if (!card->options.sniffer) {
1160                 rtnl_lock();
1161                 qeth_l3_add_mcast_rtnl(card->dev, 0, card);
1162                 if (qeth_is_supported(card, IPA_FULL_VLAN))
1163                         vlan_for_each(card->dev, qeth_l3_add_mcast_rtnl, card);
1164                 rtnl_unlock();
1165
1166                 hash_for_each_safe(card->rx_mode_addrs, i, tmp, addr, hnode) {
1167                         switch (addr->disp_flag) {
1168                         case QETH_DISP_ADDR_DELETE:
1169                                 rc = qeth_l3_deregister_addr_entry(card, addr);
1170                                 if (!rc || rc == -ENOENT) {
1171                                         hash_del(&addr->hnode);
1172                                         kfree(addr);
1173                                 }
1174                                 break;
1175                         case QETH_DISP_ADDR_ADD:
1176                                 rc = qeth_l3_register_addr_entry(card, addr);
1177                                 if (rc && rc != -ENETDOWN) {
1178                                         hash_del(&addr->hnode);
1179                                         kfree(addr);
1180                                         break;
1181                                 }
1182                                 fallthrough;
1183                         default:
1184                                 /* for next call to set_rx_mode(): */
1185                                 addr->disp_flag = QETH_DISP_ADDR_DELETE;
1186                         }
1187                 }
1188         }
1189
1190         qeth_l3_set_promisc_mode(card);
1191 }
1192
1193 static int qeth_l3_arp_makerc(u16 rc)
1194 {
1195         switch (rc) {
1196         case IPA_RC_SUCCESS:
1197                 return 0;
1198         case QETH_IPA_ARP_RC_NOTSUPP:
1199         case QETH_IPA_ARP_RC_Q_NOTSUPP:
1200                 return -EOPNOTSUPP;
1201         case QETH_IPA_ARP_RC_OUT_OF_RANGE:
1202                 return -EINVAL;
1203         case QETH_IPA_ARP_RC_Q_NO_DATA:
1204                 return -ENOENT;
1205         default:
1206                 return -EIO;
1207         }
1208 }
1209
1210 static int qeth_l3_arp_cmd_cb(struct qeth_card *card, struct qeth_reply *reply,
1211                               unsigned long data)
1212 {
1213         struct qeth_ipa_cmd *cmd = (struct qeth_ipa_cmd *) data;
1214
1215         qeth_setassparms_cb(card, reply, data);
1216         return qeth_l3_arp_makerc(cmd->hdr.return_code);
1217 }
1218
1219 static int qeth_l3_arp_set_no_entries(struct qeth_card *card, int no_entries)
1220 {
1221         struct qeth_cmd_buffer *iob;
1222         int rc;
1223
1224         QETH_CARD_TEXT(card, 3, "arpstnoe");
1225
1226         /*
1227          * currently GuestLAN only supports the ARP assist function
1228          * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_SET_NO_ENTRIES;
1229          * thus we say EOPNOTSUPP for this ARP function
1230          */
1231         if (IS_VM_NIC(card))
1232                 return -EOPNOTSUPP;
1233         if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1234                 return -EOPNOTSUPP;
1235         }
1236
1237         iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1238                                        IPA_CMD_ASS_ARP_SET_NO_ENTRIES,
1239                                        SETASS_DATA_SIZEOF(flags_32bit),
1240                                        QETH_PROT_IPV4);
1241         if (!iob)
1242                 return -ENOMEM;
1243
1244         __ipa_cmd(iob)->data.setassparms.data.flags_32bit = (u32) no_entries;
1245         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
1246         if (rc)
1247                 QETH_DBF_MESSAGE(2, "Could not set number of ARP entries on device %x: %#x\n",
1248                                  CARD_DEVID(card), rc);
1249         return rc;
1250 }
1251
1252 static __u32 get_arp_entry_size(struct qeth_card *card,
1253                         struct qeth_arp_query_data *qdata,
1254                         struct qeth_arp_entrytype *type, __u8 strip_entries)
1255 {
1256         __u32 rc;
1257         __u8 is_hsi;
1258
1259         is_hsi = qdata->reply_bits == 5;
1260         if (type->ip == QETHARP_IP_ADDR_V4) {
1261                 QETH_CARD_TEXT(card, 4, "arpev4");
1262                 if (strip_entries) {
1263                         rc = is_hsi ? sizeof(struct qeth_arp_qi_entry5_short) :
1264                                 sizeof(struct qeth_arp_qi_entry7_short);
1265                 } else {
1266                         rc = is_hsi ? sizeof(struct qeth_arp_qi_entry5) :
1267                                 sizeof(struct qeth_arp_qi_entry7);
1268                 }
1269         } else if (type->ip == QETHARP_IP_ADDR_V6) {
1270                 QETH_CARD_TEXT(card, 4, "arpev6");
1271                 if (strip_entries) {
1272                         rc = is_hsi ?
1273                                 sizeof(struct qeth_arp_qi_entry5_short_ipv6) :
1274                                 sizeof(struct qeth_arp_qi_entry7_short_ipv6);
1275                 } else {
1276                         rc = is_hsi ?
1277                                 sizeof(struct qeth_arp_qi_entry5_ipv6) :
1278                                 sizeof(struct qeth_arp_qi_entry7_ipv6);
1279                 }
1280         } else {
1281                 QETH_CARD_TEXT(card, 4, "arpinv");
1282                 rc = 0;
1283         }
1284
1285         return rc;
1286 }
1287
1288 static int arpentry_matches_prot(struct qeth_arp_entrytype *type, __u16 prot)
1289 {
1290         return (type->ip == QETHARP_IP_ADDR_V4 && prot == QETH_PROT_IPV4) ||
1291                 (type->ip == QETHARP_IP_ADDR_V6 && prot == QETH_PROT_IPV6);
1292 }
1293
1294 static int qeth_l3_arp_query_cb(struct qeth_card *card,
1295                 struct qeth_reply *reply, unsigned long data)
1296 {
1297         struct qeth_ipa_cmd *cmd;
1298         struct qeth_arp_query_data *qdata;
1299         struct qeth_arp_query_info *qinfo;
1300         int e;
1301         int entrybytes_done;
1302         int stripped_bytes;
1303         __u8 do_strip_entries;
1304
1305         QETH_CARD_TEXT(card, 3, "arpquecb");
1306
1307         qinfo = (struct qeth_arp_query_info *) reply->param;
1308         cmd = (struct qeth_ipa_cmd *) data;
1309         QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.prot_version);
1310         if (cmd->hdr.return_code) {
1311                 QETH_CARD_TEXT(card, 4, "arpcberr");
1312                 QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.return_code);
1313                 return qeth_l3_arp_makerc(cmd->hdr.return_code);
1314         }
1315         if (cmd->data.setassparms.hdr.return_code) {
1316                 cmd->hdr.return_code = cmd->data.setassparms.hdr.return_code;
1317                 QETH_CARD_TEXT(card, 4, "setaperr");
1318                 QETH_CARD_TEXT_(card, 4, "%i", cmd->hdr.return_code);
1319                 return qeth_l3_arp_makerc(cmd->hdr.return_code);
1320         }
1321         qdata = &cmd->data.setassparms.data.query_arp;
1322         QETH_CARD_TEXT_(card, 4, "anoen%i", qdata->no_entries);
1323
1324         do_strip_entries = (qinfo->mask_bits & QETH_QARP_STRIP_ENTRIES) > 0;
1325         stripped_bytes = do_strip_entries ? QETH_QARP_MEDIASPECIFIC_BYTES : 0;
1326         entrybytes_done = 0;
1327         for (e = 0; e < qdata->no_entries; ++e) {
1328                 char *cur_entry;
1329                 __u32 esize;
1330                 struct qeth_arp_entrytype *etype;
1331
1332                 cur_entry = &qdata->data + entrybytes_done;
1333                 etype = &((struct qeth_arp_qi_entry5 *) cur_entry)->type;
1334                 if (!arpentry_matches_prot(etype, cmd->hdr.prot_version)) {
1335                         QETH_CARD_TEXT(card, 4, "pmis");
1336                         QETH_CARD_TEXT_(card, 4, "%i", etype->ip);
1337                         break;
1338                 }
1339                 esize = get_arp_entry_size(card, qdata, etype,
1340                         do_strip_entries);
1341                 QETH_CARD_TEXT_(card, 5, "esz%i", esize);
1342                 if (!esize)
1343                         break;
1344
1345                 if ((qinfo->udata_len - qinfo->udata_offset) < esize) {
1346                         QETH_CARD_TEXT_(card, 4, "qaer3%i", -ENOSPC);
1347                         memset(qinfo->udata, 0, 4);
1348                         return -ENOSPC;
1349                 }
1350
1351                 memcpy(qinfo->udata + qinfo->udata_offset,
1352                         &qdata->data + entrybytes_done + stripped_bytes,
1353                         esize);
1354                 entrybytes_done += esize + stripped_bytes;
1355                 qinfo->udata_offset += esize;
1356                 ++qinfo->no_entries;
1357         }
1358         /* check if all replies received ... */
1359         if (cmd->data.setassparms.hdr.seq_no <
1360             cmd->data.setassparms.hdr.number_of_replies)
1361                 return 1;
1362         QETH_CARD_TEXT_(card, 4, "nove%i", qinfo->no_entries);
1363         memcpy(qinfo->udata, &qinfo->no_entries, 4);
1364         /* keep STRIP_ENTRIES flag so the user program can distinguish
1365          * stripped entries from normal ones */
1366         if (qinfo->mask_bits & QETH_QARP_STRIP_ENTRIES)
1367                 qdata->reply_bits |= QETH_QARP_STRIP_ENTRIES;
1368         memcpy(qinfo->udata + QETH_QARP_MASK_OFFSET, &qdata->reply_bits, 2);
1369         QETH_CARD_TEXT_(card, 4, "rc%i", 0);
1370         return 0;
1371 }
1372
1373 static int qeth_l3_query_arp_cache_info(struct qeth_card *card,
1374         enum qeth_prot_versions prot,
1375         struct qeth_arp_query_info *qinfo)
1376 {
1377         struct qeth_cmd_buffer *iob;
1378         struct qeth_ipa_cmd *cmd;
1379         int rc;
1380
1381         QETH_CARD_TEXT_(card, 3, "qarpipv%i", prot);
1382
1383         iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1384                                        IPA_CMD_ASS_ARP_QUERY_INFO,
1385                                        SETASS_DATA_SIZEOF(query_arp), prot);
1386         if (!iob)
1387                 return -ENOMEM;
1388         cmd = __ipa_cmd(iob);
1389         cmd->data.setassparms.data.query_arp.request_bits = 0x000F;
1390         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_query_cb, qinfo);
1391         if (rc)
1392                 QETH_DBF_MESSAGE(2, "Error while querying ARP cache on device %x: %#x\n",
1393                                  CARD_DEVID(card), rc);
1394         return rc;
1395 }
1396
1397 static int qeth_l3_arp_query(struct qeth_card *card, char __user *udata)
1398 {
1399         struct qeth_arp_query_info qinfo = {0, };
1400         int rc;
1401
1402         QETH_CARD_TEXT(card, 3, "arpquery");
1403
1404         if (!qeth_is_supported(card,/*IPA_QUERY_ARP_ADDR_INFO*/
1405                                IPA_ARP_PROCESSING)) {
1406                 QETH_CARD_TEXT(card, 3, "arpqnsup");
1407                 rc = -EOPNOTSUPP;
1408                 goto out;
1409         }
1410         /* get size of userspace buffer and mask_bits -> 6 bytes */
1411         if (copy_from_user(&qinfo, udata, 6)) {
1412                 rc = -EFAULT;
1413                 goto out;
1414         }
1415         qinfo.udata = kzalloc(qinfo.udata_len, GFP_KERNEL);
1416         if (!qinfo.udata) {
1417                 rc = -ENOMEM;
1418                 goto out;
1419         }
1420         qinfo.udata_offset = QETH_QARP_ENTRIES_OFFSET;
1421         rc = qeth_l3_query_arp_cache_info(card, QETH_PROT_IPV4, &qinfo);
1422         if (rc) {
1423                 if (copy_to_user(udata, qinfo.udata, 4))
1424                         rc = -EFAULT;
1425                 goto free_and_out;
1426         }
1427         if (qinfo.mask_bits & QETH_QARP_WITH_IPV6) {
1428                 /* fails in case of GuestLAN QDIO mode */
1429                 qeth_l3_query_arp_cache_info(card, QETH_PROT_IPV6, &qinfo);
1430         }
1431         if (copy_to_user(udata, qinfo.udata, qinfo.udata_len)) {
1432                 QETH_CARD_TEXT(card, 4, "qactf");
1433                 rc = -EFAULT;
1434                 goto free_and_out;
1435         }
1436         QETH_CARD_TEXT(card, 4, "qacts");
1437
1438 free_and_out:
1439         kfree(qinfo.udata);
1440 out:
1441         return rc;
1442 }
1443
1444 static int qeth_l3_arp_modify_entry(struct qeth_card *card,
1445                                     struct qeth_arp_cache_entry *entry,
1446                                     enum qeth_arp_process_subcmds arp_cmd)
1447 {
1448         struct qeth_arp_cache_entry *cmd_entry;
1449         struct qeth_cmd_buffer *iob;
1450         int rc;
1451
1452         if (arp_cmd == IPA_CMD_ASS_ARP_ADD_ENTRY)
1453                 QETH_CARD_TEXT(card, 3, "arpadd");
1454         else
1455                 QETH_CARD_TEXT(card, 3, "arpdel");
1456
1457         /*
1458          * currently GuestLAN only supports the ARP assist function
1459          * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_ADD_ENTRY;
1460          * thus we say EOPNOTSUPP for this ARP function
1461          */
1462         if (IS_VM_NIC(card))
1463                 return -EOPNOTSUPP;
1464         if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1465                 return -EOPNOTSUPP;
1466         }
1467
1468         iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING, arp_cmd,
1469                                        SETASS_DATA_SIZEOF(arp_entry),
1470                                        QETH_PROT_IPV4);
1471         if (!iob)
1472                 return -ENOMEM;
1473
1474         cmd_entry = &__ipa_cmd(iob)->data.setassparms.data.arp_entry;
1475         ether_addr_copy(cmd_entry->macaddr, entry->macaddr);
1476         memcpy(cmd_entry->ipaddr, entry->ipaddr, 4);
1477         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
1478         if (rc)
1479                 QETH_DBF_MESSAGE(2, "Could not modify (cmd: %#x) ARP entry on device %x: %#x\n",
1480                                  arp_cmd, CARD_DEVID(card), rc);
1481         return rc;
1482 }
1483
1484 static int qeth_l3_arp_flush_cache(struct qeth_card *card)
1485 {
1486         struct qeth_cmd_buffer *iob;
1487         int rc;
1488
1489         QETH_CARD_TEXT(card, 3, "arpflush");
1490
1491         /*
1492          * currently GuestLAN only supports the ARP assist function
1493          * IPA_CMD_ASS_ARP_QUERY_INFO, but not IPA_CMD_ASS_ARP_FLUSH_CACHE;
1494          * thus we say EOPNOTSUPP for this ARP function
1495         */
1496         if (IS_VM_NIC(card) || IS_IQD(card))
1497                 return -EOPNOTSUPP;
1498         if (!qeth_is_supported(card, IPA_ARP_PROCESSING)) {
1499                 return -EOPNOTSUPP;
1500         }
1501
1502         iob = qeth_get_setassparms_cmd(card, IPA_ARP_PROCESSING,
1503                                        IPA_CMD_ASS_ARP_FLUSH_CACHE, 0,
1504                                        QETH_PROT_IPV4);
1505         if (!iob)
1506                 return -ENOMEM;
1507
1508         rc = qeth_send_ipa_cmd(card, iob, qeth_l3_arp_cmd_cb, NULL);
1509         if (rc)
1510                 QETH_DBF_MESSAGE(2, "Could not flush ARP cache on device %x: %#x\n",
1511                                  CARD_DEVID(card), rc);
1512         return rc;
1513 }
1514
1515 static int qeth_l3_do_ioctl(struct net_device *dev, struct ifreq *rq, void __user *data, int cmd)
1516 {
1517         struct qeth_card *card = dev->ml_priv;
1518         struct qeth_arp_cache_entry arp_entry;
1519         enum qeth_arp_process_subcmds arp_cmd;
1520         int rc = 0;
1521
1522         switch (cmd) {
1523         case SIOC_QETH_ARP_SET_NO_ENTRIES:
1524                 if (!capable(CAP_NET_ADMIN)) {
1525                         rc = -EPERM;
1526                         break;
1527                 }
1528                 rc = qeth_l3_arp_set_no_entries(card, rq->ifr_ifru.ifru_ivalue);
1529                 break;
1530         case SIOC_QETH_ARP_QUERY_INFO:
1531                 if (!capable(CAP_NET_ADMIN)) {
1532                         rc = -EPERM;
1533                         break;
1534                 }
1535                 rc = qeth_l3_arp_query(card, data);
1536                 break;
1537         case SIOC_QETH_ARP_ADD_ENTRY:
1538         case SIOC_QETH_ARP_REMOVE_ENTRY:
1539                 if (!capable(CAP_NET_ADMIN))
1540                         return -EPERM;
1541                 if (copy_from_user(&arp_entry, data, sizeof(arp_entry)))
1542                         return -EFAULT;
1543
1544                 arp_cmd = (cmd == SIOC_QETH_ARP_ADD_ENTRY) ?
1545                                 IPA_CMD_ASS_ARP_ADD_ENTRY :
1546                                 IPA_CMD_ASS_ARP_REMOVE_ENTRY;
1547                 return qeth_l3_arp_modify_entry(card, &arp_entry, arp_cmd);
1548         case SIOC_QETH_ARP_FLUSH_CACHE:
1549                 if (!capable(CAP_NET_ADMIN)) {
1550                         rc = -EPERM;
1551                         break;
1552                 }
1553                 rc = qeth_l3_arp_flush_cache(card);
1554                 break;
1555         default:
1556                 rc = -EOPNOTSUPP;
1557         }
1558         return rc;
1559 }
1560
1561 static int qeth_l3_get_cast_type_rcu(struct sk_buff *skb, struct dst_entry *dst,
1562                                      __be16 proto)
1563 {
1564         struct neighbour *n = NULL;
1565
1566         if (dst)
1567                 n = dst_neigh_lookup_skb(dst, skb);
1568
1569         if (n) {
1570                 int cast_type = n->type;
1571
1572                 neigh_release(n);
1573                 if ((cast_type == RTN_BROADCAST) ||
1574                     (cast_type == RTN_MULTICAST) ||
1575                     (cast_type == RTN_ANYCAST))
1576                         return cast_type;
1577                 return RTN_UNICAST;
1578         }
1579
1580         /* no neighbour (eg AF_PACKET), fall back to target's IP address ... */
1581         switch (proto) {
1582         case htons(ETH_P_IP):
1583                 if (ipv4_is_lbcast(ip_hdr(skb)->daddr))
1584                         return RTN_BROADCAST;
1585                 return ipv4_is_multicast(ip_hdr(skb)->daddr) ?
1586                                 RTN_MULTICAST : RTN_UNICAST;
1587         case htons(ETH_P_IPV6):
1588                 return ipv6_addr_is_multicast(&ipv6_hdr(skb)->daddr) ?
1589                                 RTN_MULTICAST : RTN_UNICAST;
1590         case htons(ETH_P_AF_IUCV):
1591                 return RTN_UNICAST;
1592         default:
1593                 /* OSA only: ... and MAC address */
1594                 return qeth_get_ether_cast_type(skb);
1595         }
1596 }
1597
1598 static int qeth_l3_get_cast_type(struct sk_buff *skb, __be16 proto)
1599 {
1600         struct dst_entry *dst;
1601         int cast_type;
1602
1603         rcu_read_lock();
1604         dst = qeth_dst_check_rcu(skb, proto);
1605         cast_type = qeth_l3_get_cast_type_rcu(skb, dst, proto);
1606         rcu_read_unlock();
1607
1608         return cast_type;
1609 }
1610
1611 static u8 qeth_l3_cast_type_to_flag(int cast_type)
1612 {
1613         if (cast_type == RTN_MULTICAST)
1614                 return QETH_CAST_MULTICAST;
1615         if (cast_type == RTN_ANYCAST)
1616                 return QETH_CAST_ANYCAST;
1617         if (cast_type == RTN_BROADCAST)
1618                 return QETH_CAST_BROADCAST;
1619         return QETH_CAST_UNICAST;
1620 }
1621
1622 static void qeth_l3_fill_header(struct qeth_qdio_out_q *queue,
1623                                 struct qeth_hdr *hdr, struct sk_buff *skb,
1624                                 __be16 proto, unsigned int data_len)
1625 {
1626         struct qeth_hdr_layer3 *l3_hdr = &hdr->hdr.l3;
1627         struct vlan_ethhdr *veth = vlan_eth_hdr(skb);
1628         struct qeth_card *card = queue->card;
1629         struct dst_entry *dst;
1630         int cast_type;
1631
1632         hdr->hdr.l3.length = data_len;
1633
1634         if (skb_is_gso(skb)) {
1635                 hdr->hdr.l3.id = QETH_HEADER_TYPE_L3_TSO;
1636         } else {
1637                 hdr->hdr.l3.id = QETH_HEADER_TYPE_LAYER3;
1638
1639                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1640                         qeth_tx_csum(skb, &hdr->hdr.l3.ext_flags, proto);
1641                         /* some HW requires combined L3+L4 csum offload: */
1642                         if (proto == htons(ETH_P_IP))
1643                                 hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_CSUM_HDR_REQ;
1644                 }
1645         }
1646
1647         if (proto == htons(ETH_P_IP) || IS_IQD(card)) {
1648                 /* NETIF_F_HW_VLAN_CTAG_TX */
1649                 if (skb_vlan_tag_present(skb)) {
1650                         hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_VLAN_FRAME;
1651                         hdr->hdr.l3.vlan_id = skb_vlan_tag_get(skb);
1652                 }
1653         } else if (veth->h_vlan_proto == htons(ETH_P_8021Q)) {
1654                 hdr->hdr.l3.ext_flags |= QETH_HDR_EXT_INCLUDE_VLAN_TAG;
1655                 hdr->hdr.l3.vlan_id = ntohs(veth->h_vlan_TCI);
1656         }
1657
1658         rcu_read_lock();
1659         dst = qeth_dst_check_rcu(skb, proto);
1660
1661         if (IS_IQD(card) && skb_get_queue_mapping(skb) != QETH_IQD_MCAST_TXQ)
1662                 cast_type = RTN_UNICAST;
1663         else
1664                 cast_type = qeth_l3_get_cast_type_rcu(skb, dst, proto);
1665         l3_hdr->flags |= qeth_l3_cast_type_to_flag(cast_type);
1666
1667         switch (proto) {
1668         case htons(ETH_P_IP):
1669                 l3_hdr->next_hop.addr.s6_addr32[3] =
1670                                         qeth_next_hop_v4_rcu(skb, dst);
1671                 break;
1672         case htons(ETH_P_IPV6):
1673                 l3_hdr->next_hop.addr = *qeth_next_hop_v6_rcu(skb, dst);
1674
1675                 hdr->hdr.l3.flags |= QETH_HDR_IPV6;
1676                 if (!IS_IQD(card))
1677                         hdr->hdr.l3.flags |= QETH_HDR_PASSTHRU;
1678                 break;
1679         case htons(ETH_P_AF_IUCV):
1680                 l3_hdr->next_hop.addr.s6_addr16[0] = htons(0xfe80);
1681                 memcpy(&l3_hdr->next_hop.addr.s6_addr32[2],
1682                        iucv_trans_hdr(skb)->destUserID, 8);
1683                 l3_hdr->flags |= QETH_HDR_IPV6;
1684                 break;
1685         default:
1686                 /* OSA only: */
1687                 l3_hdr->flags |= QETH_HDR_PASSTHRU;
1688         }
1689         rcu_read_unlock();
1690 }
1691
1692 static void qeth_l3_fixup_headers(struct sk_buff *skb)
1693 {
1694         struct iphdr *iph = ip_hdr(skb);
1695
1696         /* this is safe, IPv6 traffic takes a different path */
1697         if (skb->ip_summed == CHECKSUM_PARTIAL)
1698                 iph->check = 0;
1699         if (skb_is_gso(skb)) {
1700                 iph->tot_len = 0;
1701                 tcp_hdr(skb)->check = ~tcp_v4_check(0, iph->saddr,
1702                                                     iph->daddr, 0);
1703         }
1704 }
1705
1706 static int qeth_l3_xmit(struct qeth_card *card, struct sk_buff *skb,
1707                         struct qeth_qdio_out_q *queue, __be16 proto)
1708 {
1709         unsigned int hw_hdr_len;
1710         int rc;
1711
1712         /* re-use the L2 header area for the HW header: */
1713         hw_hdr_len = skb_is_gso(skb) ? sizeof(struct qeth_hdr_tso) :
1714                                        sizeof(struct qeth_hdr);
1715         rc = skb_cow_head(skb, hw_hdr_len - ETH_HLEN);
1716         if (rc)
1717                 return rc;
1718         skb_pull(skb, ETH_HLEN);
1719
1720         qeth_l3_fixup_headers(skb);
1721         return qeth_xmit(card, skb, queue, proto, qeth_l3_fill_header);
1722 }
1723
1724 static netdev_tx_t qeth_l3_hard_start_xmit(struct sk_buff *skb,
1725                                            struct net_device *dev)
1726 {
1727         struct qeth_card *card = dev->ml_priv;
1728         __be16 proto = vlan_get_protocol(skb);
1729         u16 txq = skb_get_queue_mapping(skb);
1730         struct qeth_qdio_out_q *queue;
1731         int rc;
1732
1733         if (!skb_is_gso(skb))
1734                 qdisc_skb_cb(skb)->pkt_len = skb->len;
1735         if (IS_IQD(card)) {
1736                 queue = card->qdio.out_qs[qeth_iqd_translate_txq(dev, txq)];
1737
1738                 if (card->options.sniffer)
1739                         goto tx_drop;
1740
1741                 switch (proto) {
1742                 case htons(ETH_P_AF_IUCV):
1743                         if (card->options.cq != QETH_CQ_ENABLED)
1744                                 goto tx_drop;
1745                         break;
1746                 case htons(ETH_P_IP):
1747                 case htons(ETH_P_IPV6):
1748                         if (card->options.cq == QETH_CQ_ENABLED)
1749                                 goto tx_drop;
1750                         break;
1751                 default:
1752                         goto tx_drop;
1753                 }
1754         } else {
1755                 queue = card->qdio.out_qs[txq];
1756         }
1757
1758         if (!(dev->flags & IFF_BROADCAST) &&
1759             qeth_l3_get_cast_type(skb, proto) == RTN_BROADCAST)
1760                 goto tx_drop;
1761
1762         if (proto == htons(ETH_P_IP) || IS_IQD(card))
1763                 rc = qeth_l3_xmit(card, skb, queue, proto);
1764         else
1765                 rc = qeth_xmit(card, skb, queue, proto, qeth_l3_fill_header);
1766
1767         if (!rc)
1768                 return NETDEV_TX_OK;
1769
1770 tx_drop:
1771         QETH_TXQ_STAT_INC(queue, tx_dropped);
1772         kfree_skb(skb);
1773         return NETDEV_TX_OK;
1774 }
1775
1776 static void qeth_l3_set_rx_mode(struct net_device *dev)
1777 {
1778         struct qeth_card *card = dev->ml_priv;
1779
1780         schedule_work(&card->rx_mode_work);
1781 }
1782
1783 /*
1784  * we need NOARP for IPv4 but we want neighbor solicitation for IPv6. Setting
1785  * NOARP on the netdevice is no option because it also turns off neighbor
1786  * solicitation. For IPv4 we install a neighbor_setup function. We don't want
1787  * arp resolution but we want the hard header (packet socket will work
1788  * e.g. tcpdump)
1789  */
1790 static int qeth_l3_neigh_setup_noarp(struct neighbour *n)
1791 {
1792         n->nud_state = NUD_NOARP;
1793         memcpy(n->ha, "FAKELL", 6);
1794         n->output = n->ops->connected_output;
1795         return 0;
1796 }
1797
1798 static int
1799 qeth_l3_neigh_setup(struct net_device *dev, struct neigh_parms *np)
1800 {
1801         if (np->tbl->family == AF_INET)
1802                 np->neigh_setup = qeth_l3_neigh_setup_noarp;
1803
1804         return 0;
1805 }
1806
1807 static netdev_features_t qeth_l3_osa_features_check(struct sk_buff *skb,
1808                                                     struct net_device *dev,
1809                                                     netdev_features_t features)
1810 {
1811         if (vlan_get_protocol(skb) != htons(ETH_P_IP))
1812                 features &= ~NETIF_F_HW_VLAN_CTAG_TX;
1813         return qeth_features_check(skb, dev, features);
1814 }
1815
1816 static u16 qeth_l3_iqd_select_queue(struct net_device *dev, struct sk_buff *skb,
1817                                     struct net_device *sb_dev)
1818 {
1819         __be16 proto = vlan_get_protocol(skb);
1820
1821         return qeth_iqd_select_queue(dev, skb,
1822                                      qeth_l3_get_cast_type(skb, proto), sb_dev);
1823 }
1824
1825 static u16 qeth_l3_osa_select_queue(struct net_device *dev, struct sk_buff *skb,
1826                                     struct net_device *sb_dev)
1827 {
1828         struct qeth_card *card = dev->ml_priv;
1829
1830         if (qeth_uses_tx_prio_queueing(card))
1831                 return qeth_get_priority_queue(card, skb);
1832
1833         return netdev_pick_tx(dev, skb, sb_dev);
1834 }
1835
1836 static const struct net_device_ops qeth_l3_netdev_ops = {
1837         .ndo_open               = qeth_open,
1838         .ndo_stop               = qeth_stop,
1839         .ndo_get_stats64        = qeth_get_stats64,
1840         .ndo_start_xmit         = qeth_l3_hard_start_xmit,
1841         .ndo_select_queue       = qeth_l3_iqd_select_queue,
1842         .ndo_validate_addr      = eth_validate_addr,
1843         .ndo_set_rx_mode        = qeth_l3_set_rx_mode,
1844         .ndo_eth_ioctl          = qeth_do_ioctl,
1845         .ndo_siocdevprivate     = qeth_siocdevprivate,
1846         .ndo_fix_features       = qeth_fix_features,
1847         .ndo_set_features       = qeth_set_features,
1848         .ndo_tx_timeout         = qeth_tx_timeout,
1849 };
1850
1851 static const struct net_device_ops qeth_l3_osa_netdev_ops = {
1852         .ndo_open               = qeth_open,
1853         .ndo_stop               = qeth_stop,
1854         .ndo_get_stats64        = qeth_get_stats64,
1855         .ndo_start_xmit         = qeth_l3_hard_start_xmit,
1856         .ndo_features_check     = qeth_l3_osa_features_check,
1857         .ndo_select_queue       = qeth_l3_osa_select_queue,
1858         .ndo_validate_addr      = eth_validate_addr,
1859         .ndo_set_rx_mode        = qeth_l3_set_rx_mode,
1860         .ndo_eth_ioctl          = qeth_do_ioctl,
1861         .ndo_siocdevprivate     = qeth_siocdevprivate,
1862         .ndo_fix_features       = qeth_fix_features,
1863         .ndo_set_features       = qeth_set_features,
1864         .ndo_tx_timeout         = qeth_tx_timeout,
1865         .ndo_neigh_setup        = qeth_l3_neigh_setup,
1866 };
1867
1868 static int qeth_l3_setup_netdev(struct qeth_card *card)
1869 {
1870         struct net_device *dev = card->dev;
1871         unsigned int headroom;
1872         int rc;
1873
1874         if (IS_OSD(card) || IS_OSX(card)) {
1875                 card->dev->netdev_ops = &qeth_l3_osa_netdev_ops;
1876
1877                 /*IPv6 address autoconfiguration stuff*/
1878                 dev->dev_id = qeth_l3_get_unique_id(card, dev->dev_id);
1879
1880                 if (!IS_VM_NIC(card)) {
1881                         card->dev->features |= NETIF_F_SG;
1882                         card->dev->hw_features |= NETIF_F_TSO |
1883                                 NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
1884                         card->dev->vlan_features |= NETIF_F_TSO |
1885                                 NETIF_F_RXCSUM | NETIF_F_IP_CSUM;
1886                 }
1887
1888                 if (qeth_is_supported6(card, IPA_OUTBOUND_CHECKSUM_V6)) {
1889                         card->dev->hw_features |= NETIF_F_IPV6_CSUM;
1890                         card->dev->vlan_features |= NETIF_F_IPV6_CSUM;
1891                 }
1892                 if (qeth_is_supported6(card, IPA_OUTBOUND_TSO)) {
1893                         card->dev->hw_features |= NETIF_F_TSO6;
1894                         card->dev->vlan_features |= NETIF_F_TSO6;
1895                 }
1896
1897                 /* allow for de-acceleration of NETIF_F_HW_VLAN_CTAG_TX: */
1898                 if (card->dev->hw_features & NETIF_F_TSO6)
1899                         headroom = sizeof(struct qeth_hdr_tso) + VLAN_HLEN;
1900                 else if (card->dev->hw_features & NETIF_F_TSO)
1901                         headroom = sizeof(struct qeth_hdr_tso);
1902                 else
1903                         headroom = sizeof(struct qeth_hdr) + VLAN_HLEN;
1904         } else if (IS_IQD(card)) {
1905                 card->dev->flags |= IFF_NOARP;
1906                 card->dev->netdev_ops = &qeth_l3_netdev_ops;
1907                 headroom = sizeof(struct qeth_hdr) - ETH_HLEN;
1908
1909                 rc = qeth_l3_iqd_read_initial_mac(card);
1910                 if (rc)
1911                         return rc;
1912         } else
1913                 return -ENODEV;
1914
1915         card->dev->needed_headroom = headroom;
1916         card->dev->features |=  NETIF_F_HW_VLAN_CTAG_TX |
1917                                 NETIF_F_HW_VLAN_CTAG_RX;
1918
1919         netif_keep_dst(card->dev);
1920         if (card->dev->hw_features & (NETIF_F_TSO | NETIF_F_TSO6))
1921                 netif_set_gso_max_size(card->dev,
1922                                        PAGE_SIZE * (QETH_MAX_BUFFER_ELEMENTS(card) - 1));
1923
1924         netif_napi_add(card->dev, &card->napi, qeth_poll, QETH_NAPI_WEIGHT);
1925         return register_netdev(card->dev);
1926 }
1927
1928 static const struct device_type qeth_l3_devtype = {
1929         .name = "qeth_layer3",
1930         .groups = qeth_l3_attr_groups,
1931 };
1932
1933 static int qeth_l3_probe_device(struct ccwgroup_device *gdev)
1934 {
1935         struct qeth_card *card = dev_get_drvdata(&gdev->dev);
1936         int rc;
1937
1938         hash_init(card->ip_htable);
1939         mutex_init(&card->ip_lock);
1940         card->cmd_wq = alloc_ordered_workqueue("%s_cmd", 0,
1941                                                dev_name(&gdev->dev));
1942         if (!card->cmd_wq)
1943                 return -ENOMEM;
1944
1945         if (gdev->dev.type) {
1946                 rc = device_add_groups(&gdev->dev, qeth_l3_attr_groups);
1947                 if (rc) {
1948                         destroy_workqueue(card->cmd_wq);
1949                         return rc;
1950                 }
1951         } else {
1952                 gdev->dev.type = &qeth_l3_devtype;
1953         }
1954
1955         INIT_WORK(&card->rx_mode_work, qeth_l3_rx_mode_work);
1956         return 0;
1957 }
1958
1959 static void qeth_l3_remove_device(struct ccwgroup_device *cgdev)
1960 {
1961         struct qeth_card *card = dev_get_drvdata(&cgdev->dev);
1962
1963         if (cgdev->dev.type != &qeth_l3_devtype)
1964                 device_remove_groups(&cgdev->dev, qeth_l3_attr_groups);
1965
1966         qeth_set_allowed_threads(card, 0, 1);
1967         wait_event(card->wait_q, qeth_threads_running(card, 0xffffffff) == 0);
1968
1969         if (cgdev->state == CCWGROUP_ONLINE)
1970                 qeth_set_offline(card, card->discipline, false);
1971
1972         cancel_work_sync(&card->close_dev_work);
1973         if (card->dev->reg_state == NETREG_REGISTERED)
1974                 unregister_netdev(card->dev);
1975
1976         flush_workqueue(card->cmd_wq);
1977         destroy_workqueue(card->cmd_wq);
1978         qeth_l3_clear_ip_htable(card, 0);
1979         qeth_l3_clear_ipato_list(card);
1980 }
1981
1982 static int qeth_l3_set_online(struct qeth_card *card, bool carrier_ok)
1983 {
1984         struct net_device *dev = card->dev;
1985         int rc = 0;
1986
1987         /* softsetup */
1988         QETH_CARD_TEXT(card, 2, "softsetp");
1989
1990         rc = qeth_l3_setadapter_parms(card);
1991         if (rc)
1992                 QETH_CARD_TEXT_(card, 2, "2err%04x", rc);
1993         if (!card->options.sniffer) {
1994                 qeth_l3_start_ipassists(card);
1995
1996                 rc = qeth_l3_setrouting_v4(card);
1997                 if (rc)
1998                         QETH_CARD_TEXT_(card, 2, "4err%04x", rc);
1999                 rc = qeth_l3_setrouting_v6(card);
2000                 if (rc)
2001                         QETH_CARD_TEXT_(card, 2, "5err%04x", rc);
2002         }
2003
2004         card->state = CARD_STATE_SOFTSETUP;
2005
2006         qeth_set_allowed_threads(card, 0xffffffff, 0);
2007         qeth_l3_recover_ip(card);
2008
2009         if (dev->reg_state != NETREG_REGISTERED) {
2010                 rc = qeth_l3_setup_netdev(card);
2011                 if (rc)
2012                         goto err_setup;
2013
2014                 if (carrier_ok)
2015                         netif_carrier_on(dev);
2016         } else {
2017                 rtnl_lock();
2018                 rc = qeth_set_real_num_tx_queues(card,
2019                                                  qeth_tx_actual_queues(card));
2020                 if (rc) {
2021                         rtnl_unlock();
2022                         goto err_set_queues;
2023                 }
2024
2025                 if (carrier_ok)
2026                         netif_carrier_on(dev);
2027                 else
2028                         netif_carrier_off(dev);
2029
2030                 netif_device_attach(dev);
2031                 qeth_enable_hw_features(dev);
2032
2033                 if (card->info.open_when_online) {
2034                         card->info.open_when_online = 0;
2035                         dev_open(dev, NULL);
2036                 }
2037                 rtnl_unlock();
2038         }
2039         return 0;
2040
2041 err_set_queues:
2042 err_setup:
2043         qeth_set_allowed_threads(card, 0, 1);
2044         card->state = CARD_STATE_DOWN;
2045         qeth_l3_clear_ip_htable(card, 1);
2046         return rc;
2047 }
2048
2049 static void qeth_l3_set_offline(struct qeth_card *card)
2050 {
2051         qeth_set_allowed_threads(card, 0, 1);
2052         qeth_l3_drain_rx_mode_cache(card);
2053
2054         if (card->options.sniffer &&
2055             (card->info.promisc_mode == SET_PROMISC_MODE_ON))
2056                 qeth_diags_trace(card, QETH_DIAGS_CMD_TRACE_DISABLE);
2057
2058         if (card->state == CARD_STATE_SOFTSETUP) {
2059                 card->state = CARD_STATE_DOWN;
2060                 qeth_l3_clear_ip_htable(card, 1);
2061         }
2062 }
2063
2064 /* Returns zero if the command is successfully "consumed" */
2065 static int qeth_l3_control_event(struct qeth_card *card,
2066                                         struct qeth_ipa_cmd *cmd)
2067 {
2068         return 1;
2069 }
2070
2071 const struct qeth_discipline qeth_l3_discipline = {
2072         .setup = qeth_l3_probe_device,
2073         .remove = qeth_l3_remove_device,
2074         .set_online = qeth_l3_set_online,
2075         .set_offline = qeth_l3_set_offline,
2076         .do_ioctl = qeth_l3_do_ioctl,
2077         .control_event_handler = qeth_l3_control_event,
2078 };
2079 EXPORT_SYMBOL_GPL(qeth_l3_discipline);
2080
2081 static int qeth_l3_handle_ip_event(struct qeth_card *card,
2082                                    struct qeth_ipaddr *addr,
2083                                    unsigned long event)
2084 {
2085         switch (event) {
2086         case NETDEV_UP:
2087                 qeth_l3_modify_ip(card, addr, true);
2088                 return NOTIFY_OK;
2089         case NETDEV_DOWN:
2090                 qeth_l3_modify_ip(card, addr, false);
2091                 return NOTIFY_OK;
2092         default:
2093                 return NOTIFY_DONE;
2094         }
2095 }
2096
2097 struct qeth_l3_ip_event_work {
2098         struct work_struct work;
2099         struct qeth_card *card;
2100         struct qeth_ipaddr addr;
2101 };
2102
2103 #define to_ip_work(w) container_of((w), struct qeth_l3_ip_event_work, work)
2104
2105 static void qeth_l3_add_ip_worker(struct work_struct *work)
2106 {
2107         struct qeth_l3_ip_event_work *ip_work = to_ip_work(work);
2108
2109         qeth_l3_modify_ip(ip_work->card, &ip_work->addr, true);
2110         kfree(work);
2111 }
2112
2113 static void qeth_l3_delete_ip_worker(struct work_struct *work)
2114 {
2115         struct qeth_l3_ip_event_work *ip_work = to_ip_work(work);
2116
2117         qeth_l3_modify_ip(ip_work->card, &ip_work->addr, false);
2118         kfree(work);
2119 }
2120
2121 static struct qeth_card *qeth_l3_get_card_from_dev(struct net_device *dev)
2122 {
2123         if (is_vlan_dev(dev))
2124                 dev = vlan_dev_real_dev(dev);
2125         if (dev->netdev_ops == &qeth_l3_osa_netdev_ops ||
2126             dev->netdev_ops == &qeth_l3_netdev_ops)
2127                 return (struct qeth_card *) dev->ml_priv;
2128         return NULL;
2129 }
2130
2131 static int qeth_l3_ip_event(struct notifier_block *this,
2132                             unsigned long event, void *ptr)
2133 {
2134         struct in_ifaddr *ifa = (struct in_ifaddr *)ptr;
2135         struct net_device *dev = ifa->ifa_dev->dev;
2136         struct qeth_ipaddr addr;
2137         struct qeth_card *card;
2138
2139         card = qeth_l3_get_card_from_dev(dev);
2140         if (!card)
2141                 return NOTIFY_DONE;
2142         QETH_CARD_TEXT(card, 3, "ipevent");
2143
2144         qeth_l3_init_ipaddr(&addr, QETH_IP_TYPE_NORMAL, QETH_PROT_IPV4);
2145         addr.u.a4.addr = ifa->ifa_address;
2146         addr.u.a4.mask = ifa->ifa_mask;
2147
2148         return qeth_l3_handle_ip_event(card, &addr, event);
2149 }
2150
2151 static struct notifier_block qeth_l3_ip_notifier = {
2152         qeth_l3_ip_event,
2153         NULL,
2154 };
2155
2156 static int qeth_l3_ip6_event(struct notifier_block *this,
2157                              unsigned long event, void *ptr)
2158 {
2159         struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
2160         struct net_device *dev = ifa->idev->dev;
2161         struct qeth_l3_ip_event_work *ip_work;
2162         struct qeth_card *card;
2163
2164         if (event != NETDEV_UP && event != NETDEV_DOWN)
2165                 return NOTIFY_DONE;
2166
2167         card = qeth_l3_get_card_from_dev(dev);
2168         if (!card)
2169                 return NOTIFY_DONE;
2170         QETH_CARD_TEXT(card, 3, "ip6event");
2171         if (!qeth_is_supported(card, IPA_IPV6))
2172                 return NOTIFY_DONE;
2173
2174         ip_work = kmalloc(sizeof(*ip_work), GFP_ATOMIC);
2175         if (!ip_work)
2176                 return NOTIFY_DONE;
2177
2178         if (event == NETDEV_UP)
2179                 INIT_WORK(&ip_work->work, qeth_l3_add_ip_worker);
2180         else
2181                 INIT_WORK(&ip_work->work, qeth_l3_delete_ip_worker);
2182
2183         ip_work->card = card;
2184         qeth_l3_init_ipaddr(&ip_work->addr, QETH_IP_TYPE_NORMAL,
2185                             QETH_PROT_IPV6);
2186         ip_work->addr.u.a6.addr = ifa->addr;
2187         ip_work->addr.u.a6.pfxlen = ifa->prefix_len;
2188
2189         queue_work(card->cmd_wq, &ip_work->work);
2190         return NOTIFY_OK;
2191 }
2192
2193 static struct notifier_block qeth_l3_ip6_notifier = {
2194         qeth_l3_ip6_event,
2195         NULL,
2196 };
2197
2198 static int qeth_l3_register_notifiers(void)
2199 {
2200         int rc;
2201
2202         QETH_DBF_TEXT(SETUP, 5, "regnotif");
2203         rc = register_inetaddr_notifier(&qeth_l3_ip_notifier);
2204         if (rc)
2205                 return rc;
2206         rc = register_inet6addr_notifier(&qeth_l3_ip6_notifier);
2207         if (rc) {
2208                 unregister_inetaddr_notifier(&qeth_l3_ip_notifier);
2209                 return rc;
2210         }
2211         return 0;
2212 }
2213
2214 static void qeth_l3_unregister_notifiers(void)
2215 {
2216         QETH_DBF_TEXT(SETUP, 5, "unregnot");
2217         WARN_ON(unregister_inetaddr_notifier(&qeth_l3_ip_notifier));
2218         WARN_ON(unregister_inet6addr_notifier(&qeth_l3_ip6_notifier));
2219 }
2220
2221 static int __init qeth_l3_init(void)
2222 {
2223         pr_info("register layer 3 discipline\n");
2224         return qeth_l3_register_notifiers();
2225 }
2226
2227 static void __exit qeth_l3_exit(void)
2228 {
2229         qeth_l3_unregister_notifiers();
2230         pr_info("unregister layer 3 discipline\n");
2231 }
2232
2233 module_init(qeth_l3_init);
2234 module_exit(qeth_l3_exit);
2235 MODULE_AUTHOR("Frank Blaschka <frank.blaschka@de.ibm.com>");
2236 MODULE_DESCRIPTION("qeth layer 3 discipline");
2237 MODULE_LICENSE("GPL");